diff options
Diffstat (limited to '')
28 files changed, 14878 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/Kconfig b/drivers/infiniband/hw/mthca/Kconfig new file mode 100644 index 000000000..faa7381f7 --- /dev/null +++ b/drivers/infiniband/hw/mthca/Kconfig @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0-only +config INFINIBAND_MTHCA + tristate "Mellanox HCA support" + depends on PCI + help + This is a low-level driver for Mellanox InfiniHost host + channel adapters (HCAs), including the MT23108 PCI-X HCA + ("Tavor") and the MT25208 PCI Express HCA ("Arbel"). + +config INFINIBAND_MTHCA_DEBUG + bool "Verbose debugging output" if EXPERT + depends on INFINIBAND_MTHCA + default y + help + This option causes debugging code to be compiled into the + mthca driver. The output can be turned on via the + debug_level module parameter (which can also be set after + the driver is loaded through sysfs). diff --git a/drivers/infiniband/hw/mthca/Makefile b/drivers/infiniband/hw/mthca/Makefile new file mode 100644 index 000000000..3a09e9ffd --- /dev/null +++ b/drivers/infiniband/hw/mthca/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_INFINIBAND_MTHCA) += ib_mthca.o + +ib_mthca-y := mthca_main.o mthca_cmd.o mthca_profile.o mthca_reset.o \ + mthca_allocator.o mthca_eq.o mthca_pd.o mthca_cq.o \ + mthca_mr.o mthca_qp.o mthca_av.o mthca_mcg.o mthca_mad.o \ + mthca_provider.o mthca_memfree.o mthca_uar.o mthca_srq.o \ + mthca_catas.o diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c new file mode 100644 index 000000000..aef1d274a --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_allocator.c @@ -0,0 +1,303 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/bitmap.h> + +#include "mthca_dev.h" + +/* Trivial bitmap-based allocator */ +u32 mthca_alloc(struct mthca_alloc *alloc) +{ + unsigned long flags; + u32 obj; + + spin_lock_irqsave(&alloc->lock, flags); + + obj = find_next_zero_bit(alloc->table, alloc->max, alloc->last); + if (obj >= alloc->max) { + alloc->top = (alloc->top + alloc->max) & alloc->mask; + obj = find_first_zero_bit(alloc->table, alloc->max); + } + + if (obj < alloc->max) { + set_bit(obj, alloc->table); + obj |= alloc->top; + } else + obj = -1; + + spin_unlock_irqrestore(&alloc->lock, flags); + + return obj; +} + +void mthca_free(struct mthca_alloc *alloc, u32 obj) +{ + unsigned long flags; + + obj &= alloc->max - 1; + + spin_lock_irqsave(&alloc->lock, flags); + + clear_bit(obj, alloc->table); + alloc->last = min(alloc->last, obj); + alloc->top = (alloc->top + alloc->max) & alloc->mask; + + spin_unlock_irqrestore(&alloc->lock, flags); +} + +int mthca_alloc_init(struct mthca_alloc *alloc, u32 num, u32 mask, + u32 reserved) +{ + int i; + + /* num must be a power of 2 */ + if (num != 1 << (ffs(num) - 1)) + return -EINVAL; + + alloc->last = 0; + alloc->top = 0; + alloc->max = num; + alloc->mask = mask; + spin_lock_init(&alloc->lock); + alloc->table = kmalloc_array(BITS_TO_LONGS(num), sizeof(long), + GFP_KERNEL); + if (!alloc->table) + return -ENOMEM; + + bitmap_zero(alloc->table, num); + for (i = 0; i < reserved; ++i) + set_bit(i, alloc->table); + + return 0; +} + +void mthca_alloc_cleanup(struct mthca_alloc *alloc) +{ + kfree(alloc->table); +} + +/* + * Array of pointers with lazy allocation of leaf pages. Callers of + * _get, _set and _clear methods must use a lock or otherwise + * serialize access to the array. + */ + +#define MTHCA_ARRAY_MASK (PAGE_SIZE / sizeof (void *) - 1) + +void *mthca_array_get(struct mthca_array *array, int index) +{ + int p = (index * sizeof (void *)) >> PAGE_SHIFT; + + if (array->page_list[p].page) + return array->page_list[p].page[index & MTHCA_ARRAY_MASK]; + else + return NULL; +} + +int mthca_array_set(struct mthca_array *array, int index, void *value) +{ + int p = (index * sizeof (void *)) >> PAGE_SHIFT; + + /* Allocate with GFP_ATOMIC because we'll be called with locks held. */ + if (!array->page_list[p].page) + array->page_list[p].page = (void **) get_zeroed_page(GFP_ATOMIC); + + if (!array->page_list[p].page) + return -ENOMEM; + + array->page_list[p].page[index & MTHCA_ARRAY_MASK] = value; + ++array->page_list[p].used; + + return 0; +} + +void mthca_array_clear(struct mthca_array *array, int index) +{ + int p = (index * sizeof (void *)) >> PAGE_SHIFT; + + if (--array->page_list[p].used == 0) { + free_page((unsigned long) array->page_list[p].page); + array->page_list[p].page = NULL; + } else + array->page_list[p].page[index & MTHCA_ARRAY_MASK] = NULL; + + if (array->page_list[p].used < 0) + pr_debug("Array %p index %d page %d with ref count %d < 0\n", + array, index, p, array->page_list[p].used); +} + +int mthca_array_init(struct mthca_array *array, int nent) +{ + int npage = (nent * sizeof (void *) + PAGE_SIZE - 1) / PAGE_SIZE; + int i; + + array->page_list = kmalloc_array(npage, sizeof(*array->page_list), + GFP_KERNEL); + if (!array->page_list) + return -ENOMEM; + + for (i = 0; i < npage; ++i) { + array->page_list[i].page = NULL; + array->page_list[i].used = 0; + } + + return 0; +} + +void mthca_array_cleanup(struct mthca_array *array, int nent) +{ + int i; + + for (i = 0; i < (nent * sizeof (void *) + PAGE_SIZE - 1) / PAGE_SIZE; ++i) + free_page((unsigned long) array->page_list[i].page); + + kfree(array->page_list); +} + +/* + * Handling for queue buffers -- we allocate a bunch of memory and + * register it in a memory region at HCA virtual address 0. If the + * requested size is > max_direct, we split the allocation into + * multiple pages, so we don't require too much contiguous memory. + */ + +int mthca_buf_alloc(struct mthca_dev *dev, int size, int max_direct, + union mthca_buf *buf, int *is_direct, struct mthca_pd *pd, + int hca_write, struct mthca_mr *mr) +{ + int err = -ENOMEM; + int npages, shift; + u64 *dma_list = NULL; + dma_addr_t t; + int i; + + if (size <= max_direct) { + *is_direct = 1; + npages = 1; + shift = get_order(size) + PAGE_SHIFT; + + buf->direct.buf = dma_alloc_coherent(&dev->pdev->dev, + size, &t, GFP_KERNEL); + if (!buf->direct.buf) + return -ENOMEM; + + dma_unmap_addr_set(&buf->direct, mapping, t); + + while (t & ((1 << shift) - 1)) { + --shift; + npages *= 2; + } + + dma_list = kmalloc_array(npages, sizeof(*dma_list), + GFP_KERNEL); + if (!dma_list) + goto err_free; + + for (i = 0; i < npages; ++i) + dma_list[i] = t + i * (1 << shift); + } else { + *is_direct = 0; + npages = (size + PAGE_SIZE - 1) / PAGE_SIZE; + shift = PAGE_SHIFT; + + dma_list = kmalloc_array(npages, sizeof(*dma_list), + GFP_KERNEL); + if (!dma_list) + return -ENOMEM; + + buf->page_list = kmalloc_array(npages, + sizeof(*buf->page_list), + GFP_KERNEL); + if (!buf->page_list) + goto err_out; + + for (i = 0; i < npages; ++i) + buf->page_list[i].buf = NULL; + + for (i = 0; i < npages; ++i) { + buf->page_list[i].buf = + dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE, + &t, GFP_KERNEL); + if (!buf->page_list[i].buf) + goto err_free; + + dma_list[i] = t; + dma_unmap_addr_set(&buf->page_list[i], mapping, t); + + clear_page(buf->page_list[i].buf); + } + } + + err = mthca_mr_alloc_phys(dev, pd->pd_num, + dma_list, shift, npages, + 0, size, + MTHCA_MPT_FLAG_LOCAL_READ | + (hca_write ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0), + mr); + if (err) + goto err_free; + + kfree(dma_list); + + return 0; + +err_free: + mthca_buf_free(dev, size, buf, *is_direct, NULL); + +err_out: + kfree(dma_list); + + return err; +} + +void mthca_buf_free(struct mthca_dev *dev, int size, union mthca_buf *buf, + int is_direct, struct mthca_mr *mr) +{ + int i; + + if (mr) + mthca_free_mr(dev, mr); + + if (is_direct) + dma_free_coherent(&dev->pdev->dev, size, buf->direct.buf, + dma_unmap_addr(&buf->direct, mapping)); + else { + for (i = 0; i < (size + PAGE_SIZE - 1) / PAGE_SIZE; ++i) + dma_free_coherent(&dev->pdev->dev, PAGE_SIZE, + buf->page_list[i].buf, + dma_unmap_addr(&buf->page_list[i], + mapping)); + kfree(buf->page_list); + } +} diff --git a/drivers/infiniband/hw/mthca/mthca_av.c b/drivers/infiniband/hw/mthca/mthca_av.c new file mode 100644 index 000000000..f051f4e06 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_av.c @@ -0,0 +1,376 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/string.h> +#include <linux/slab.h> + +#include <rdma/ib_verbs.h> +#include <rdma/ib_cache.h> + +#include "mthca_dev.h" + +enum { + MTHCA_RATE_TAVOR_FULL = 0, + MTHCA_RATE_TAVOR_1X = 1, + MTHCA_RATE_TAVOR_4X = 2, + MTHCA_RATE_TAVOR_1X_DDR = 3 +}; + +enum { + MTHCA_RATE_MEMFREE_FULL = 0, + MTHCA_RATE_MEMFREE_QUARTER = 1, + MTHCA_RATE_MEMFREE_EIGHTH = 2, + MTHCA_RATE_MEMFREE_HALF = 3 +}; + +struct mthca_av { + __be32 port_pd; + u8 reserved1; + u8 g_slid; + __be16 dlid; + u8 reserved2; + u8 gid_index; + u8 msg_sr; + u8 hop_limit; + __be32 sl_tclass_flowlabel; + __be32 dgid[4]; +}; + +static enum ib_rate memfree_rate_to_ib(u8 mthca_rate, u8 port_rate) +{ + switch (mthca_rate) { + case MTHCA_RATE_MEMFREE_EIGHTH: + return mult_to_ib_rate(port_rate >> 3); + case MTHCA_RATE_MEMFREE_QUARTER: + return mult_to_ib_rate(port_rate >> 2); + case MTHCA_RATE_MEMFREE_HALF: + return mult_to_ib_rate(port_rate >> 1); + case MTHCA_RATE_MEMFREE_FULL: + default: + return mult_to_ib_rate(port_rate); + } +} + +static enum ib_rate tavor_rate_to_ib(u8 mthca_rate, u8 port_rate) +{ + switch (mthca_rate) { + case MTHCA_RATE_TAVOR_1X: return IB_RATE_2_5_GBPS; + case MTHCA_RATE_TAVOR_1X_DDR: return IB_RATE_5_GBPS; + case MTHCA_RATE_TAVOR_4X: return IB_RATE_10_GBPS; + default: return mult_to_ib_rate(port_rate); + } +} + +enum ib_rate mthca_rate_to_ib(struct mthca_dev *dev, u8 mthca_rate, u8 port) +{ + if (mthca_is_memfree(dev)) { + /* Handle old Arbel FW */ + if (dev->limits.stat_rate_support == 0x3 && mthca_rate) + return IB_RATE_2_5_GBPS; + + return memfree_rate_to_ib(mthca_rate, dev->rate[port - 1]); + } else + return tavor_rate_to_ib(mthca_rate, dev->rate[port - 1]); +} + +static u8 ib_rate_to_memfree(u8 req_rate, u8 cur_rate) +{ + if (cur_rate <= req_rate) + return 0; + + /* + * Inter-packet delay (IPD) to get from rate X down to a rate + * no more than Y is (X - 1) / Y. + */ + switch ((cur_rate - 1) / req_rate) { + case 0: return MTHCA_RATE_MEMFREE_FULL; + case 1: return MTHCA_RATE_MEMFREE_HALF; + case 2: + case 3: return MTHCA_RATE_MEMFREE_QUARTER; + default: return MTHCA_RATE_MEMFREE_EIGHTH; + } +} + +static u8 ib_rate_to_tavor(u8 static_rate) +{ + switch (static_rate) { + case IB_RATE_2_5_GBPS: return MTHCA_RATE_TAVOR_1X; + case IB_RATE_5_GBPS: return MTHCA_RATE_TAVOR_1X_DDR; + case IB_RATE_10_GBPS: return MTHCA_RATE_TAVOR_4X; + default: return MTHCA_RATE_TAVOR_FULL; + } +} + +u8 mthca_get_rate(struct mthca_dev *dev, int static_rate, u8 port) +{ + u8 rate; + + if (!static_rate || ib_rate_to_mult(static_rate) >= dev->rate[port - 1]) + return 0; + + if (mthca_is_memfree(dev)) + rate = ib_rate_to_memfree(ib_rate_to_mult(static_rate), + dev->rate[port - 1]); + else + rate = ib_rate_to_tavor(static_rate); + + if (!(dev->limits.stat_rate_support & (1 << rate))) + rate = 1; + + return rate; +} + +int mthca_create_ah(struct mthca_dev *dev, + struct mthca_pd *pd, + struct rdma_ah_attr *ah_attr, + struct mthca_ah *ah) +{ + u32 index = -1; + struct mthca_av *av = NULL; + + ah->type = MTHCA_AH_PCI_POOL; + + if (mthca_is_memfree(dev)) { + ah->av = kmalloc(sizeof *ah->av, GFP_ATOMIC); + if (!ah->av) + return -ENOMEM; + + ah->type = MTHCA_AH_KMALLOC; + av = ah->av; + } else if (!atomic_read(&pd->sqp_count) && + !(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) { + index = mthca_alloc(&dev->av_table.alloc); + + /* fall back to allocate in host memory */ + if (index == -1) + goto on_hca_fail; + + av = kmalloc(sizeof *av, GFP_ATOMIC); + if (!av) + goto on_hca_fail; + + ah->type = MTHCA_AH_ON_HCA; + ah->avdma = dev->av_table.ddr_av_base + + index * MTHCA_AV_SIZE; + } + +on_hca_fail: + if (ah->type == MTHCA_AH_PCI_POOL) { + ah->av = dma_pool_zalloc(dev->av_table.pool, + GFP_ATOMIC, &ah->avdma); + if (!ah->av) + return -ENOMEM; + + av = ah->av; + } + + ah->key = pd->ntmr.ibmr.lkey; + + av->port_pd = cpu_to_be32(pd->pd_num | + (rdma_ah_get_port_num(ah_attr) << 24)); + av->g_slid = rdma_ah_get_path_bits(ah_attr); + av->dlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr)); + av->msg_sr = (3 << 4) | /* 2K message */ + mthca_get_rate(dev, rdma_ah_get_static_rate(ah_attr), + rdma_ah_get_port_num(ah_attr)); + av->sl_tclass_flowlabel = cpu_to_be32(rdma_ah_get_sl(ah_attr) << 28); + if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { + const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr); + + av->g_slid |= 0x80; + av->gid_index = (rdma_ah_get_port_num(ah_attr) - 1) * + dev->limits.gid_table_len + + grh->sgid_index; + av->hop_limit = grh->hop_limit; + av->sl_tclass_flowlabel |= + cpu_to_be32((grh->traffic_class << 20) | + grh->flow_label); + memcpy(av->dgid, grh->dgid.raw, 16); + } else { + /* Arbel workaround -- low byte of GID must be 2 */ + av->dgid[3] = cpu_to_be32(2); + } + + if (0) { + int j; + + mthca_dbg(dev, "Created UDAV at %p/%08lx:\n", + av, (unsigned long) ah->avdma); + for (j = 0; j < 8; ++j) + printk(KERN_DEBUG " [%2x] %08x\n", + j * 4, be32_to_cpu(((__be32 *) av)[j])); + } + + if (ah->type == MTHCA_AH_ON_HCA) { + memcpy_toio(dev->av_table.av_map + index * MTHCA_AV_SIZE, + av, MTHCA_AV_SIZE); + kfree(av); + } + + return 0; +} + +int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah) +{ + switch (ah->type) { + case MTHCA_AH_ON_HCA: + mthca_free(&dev->av_table.alloc, + (ah->avdma - dev->av_table.ddr_av_base) / + MTHCA_AV_SIZE); + break; + + case MTHCA_AH_PCI_POOL: + dma_pool_free(dev->av_table.pool, ah->av, ah->avdma); + break; + + case MTHCA_AH_KMALLOC: + kfree(ah->av); + break; + } + + return 0; +} + +int mthca_ah_grh_present(struct mthca_ah *ah) +{ + return !!(ah->av->g_slid & 0x80); +} + +int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah, + struct ib_ud_header *header) +{ + if (ah->type == MTHCA_AH_ON_HCA) + return -EINVAL; + + header->lrh.service_level = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28; + header->lrh.destination_lid = ah->av->dlid; + header->lrh.source_lid = cpu_to_be16(ah->av->g_slid & 0x7f); + if (mthca_ah_grh_present(ah)) { + header->grh.traffic_class = + (be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff; + header->grh.flow_label = + ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff); + header->grh.hop_limit = ah->av->hop_limit; + header->grh.source_gid = ah->ibah.sgid_attr->gid; + memcpy(header->grh.destination_gid.raw, + ah->av->dgid, 16); + } + + return 0; +} + +int mthca_ah_query(struct ib_ah *ibah, struct rdma_ah_attr *attr) +{ + struct mthca_ah *ah = to_mah(ibah); + struct mthca_dev *dev = to_mdev(ibah->device); + u8 port_num = be32_to_cpu(ah->av->port_pd) >> 24; + + /* Only implement for MAD and memfree ah for now. */ + if (ah->type == MTHCA_AH_ON_HCA) + return -ENOSYS; + + memset(attr, 0, sizeof *attr); + attr->type = ibah->type; + rdma_ah_set_dlid(attr, be16_to_cpu(ah->av->dlid)); + rdma_ah_set_sl(attr, be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28); + rdma_ah_set_port_num(attr, port_num); + rdma_ah_set_static_rate(attr, + mthca_rate_to_ib(dev, ah->av->msg_sr & 0x7, + port_num)); + rdma_ah_set_path_bits(attr, ah->av->g_slid & 0x7F); + if (mthca_ah_grh_present(ah)) { + u32 tc_fl = be32_to_cpu(ah->av->sl_tclass_flowlabel); + + rdma_ah_set_grh(attr, NULL, + tc_fl & 0xfffff, + ah->av->gid_index & + (dev->limits.gid_table_len - 1), + ah->av->hop_limit, + (tc_fl >> 20) & 0xff); + rdma_ah_set_dgid_raw(attr, ah->av->dgid); + } + + return 0; +} + +int mthca_init_av_table(struct mthca_dev *dev) +{ + int err; + + if (mthca_is_memfree(dev)) + return 0; + + err = mthca_alloc_init(&dev->av_table.alloc, + dev->av_table.num_ddr_avs, + dev->av_table.num_ddr_avs - 1, + 0); + if (err) + return err; + + dev->av_table.pool = dma_pool_create("mthca_av", &dev->pdev->dev, + MTHCA_AV_SIZE, + MTHCA_AV_SIZE, 0); + if (!dev->av_table.pool) + goto out_free_alloc; + + if (!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) { + dev->av_table.av_map = ioremap(pci_resource_start(dev->pdev, 4) + + dev->av_table.ddr_av_base - + dev->ddr_start, + dev->av_table.num_ddr_avs * + MTHCA_AV_SIZE); + if (!dev->av_table.av_map) + goto out_free_pool; + } else + dev->av_table.av_map = NULL; + + return 0; + + out_free_pool: + dma_pool_destroy(dev->av_table.pool); + + out_free_alloc: + mthca_alloc_cleanup(&dev->av_table.alloc); + return -ENOMEM; +} + +void mthca_cleanup_av_table(struct mthca_dev *dev) +{ + if (mthca_is_memfree(dev)) + return; + + if (dev->av_table.av_map) + iounmap(dev->av_table.av_map); + dma_pool_destroy(dev->av_table.pool); + mthca_alloc_cleanup(&dev->av_table.alloc); +} diff --git a/drivers/infiniband/hw/mthca/mthca_catas.c b/drivers/infiniband/hw/mthca/mthca_catas.c new file mode 100644 index 000000000..ffb98eaaf --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_catas.c @@ -0,0 +1,198 @@ +/* + * Copyright (c) 2005 Cisco Systems. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/jiffies.h> +#include <linux/module.h> +#include <linux/timer.h> +#include <linux/workqueue.h> + +#include "mthca_dev.h" + +enum { + MTHCA_CATAS_POLL_INTERVAL = 5 * HZ, + + MTHCA_CATAS_TYPE_INTERNAL = 0, + MTHCA_CATAS_TYPE_UPLINK = 3, + MTHCA_CATAS_TYPE_DDR = 4, + MTHCA_CATAS_TYPE_PARITY = 5, +}; + +static DEFINE_SPINLOCK(catas_lock); + +static LIST_HEAD(catas_list); +static struct workqueue_struct *catas_wq; +static struct work_struct catas_work; + +static int catas_reset_disable; +module_param_named(catas_reset_disable, catas_reset_disable, int, 0644); +MODULE_PARM_DESC(catas_reset_disable, "disable reset on catastrophic event if nonzero"); + +static void catas_reset(struct work_struct *work) +{ + struct mthca_dev *dev, *tmpdev; + LIST_HEAD(tlist); + int ret; + + mutex_lock(&mthca_device_mutex); + + spin_lock_irq(&catas_lock); + list_splice_init(&catas_list, &tlist); + spin_unlock_irq(&catas_lock); + + list_for_each_entry_safe(dev, tmpdev, &tlist, catas_err.list) { + struct pci_dev *pdev = dev->pdev; + ret = __mthca_restart_one(dev->pdev); + /* 'dev' now is not valid */ + if (ret) + printk(KERN_ERR "mthca %s: Reset failed (%d)\n", + pci_name(pdev), ret); + else { + struct mthca_dev *d = pci_get_drvdata(pdev); + mthca_dbg(d, "Reset succeeded\n"); + } + } + + mutex_unlock(&mthca_device_mutex); +} + +static void handle_catas(struct mthca_dev *dev) +{ + struct ib_event event; + unsigned long flags; + const char *type; + int i; + + event.device = &dev->ib_dev; + event.event = IB_EVENT_DEVICE_FATAL; + event.element.port_num = 0; + dev->active = false; + + ib_dispatch_event(&event); + + switch (swab32(readl(dev->catas_err.map)) >> 24) { + case MTHCA_CATAS_TYPE_INTERNAL: + type = "internal error"; + break; + case MTHCA_CATAS_TYPE_UPLINK: + type = "uplink bus error"; + break; + case MTHCA_CATAS_TYPE_DDR: + type = "DDR data error"; + break; + case MTHCA_CATAS_TYPE_PARITY: + type = "internal parity error"; + break; + default: + type = "unknown error"; + break; + } + + mthca_err(dev, "Catastrophic error detected: %s\n", type); + for (i = 0; i < dev->catas_err.size; ++i) + mthca_err(dev, " buf[%02x]: %08x\n", + i, swab32(readl(dev->catas_err.map + i))); + + if (catas_reset_disable) + return; + + spin_lock_irqsave(&catas_lock, flags); + list_add(&dev->catas_err.list, &catas_list); + queue_work(catas_wq, &catas_work); + spin_unlock_irqrestore(&catas_lock, flags); +} + +static void poll_catas(struct timer_list *t) +{ + struct mthca_dev *dev = from_timer(dev, t, catas_err.timer); + int i; + + for (i = 0; i < dev->catas_err.size; ++i) + if (readl(dev->catas_err.map + i)) { + handle_catas(dev); + return; + } + + mod_timer(&dev->catas_err.timer, + round_jiffies(jiffies + MTHCA_CATAS_POLL_INTERVAL)); +} + +void mthca_start_catas_poll(struct mthca_dev *dev) +{ + phys_addr_t addr; + + timer_setup(&dev->catas_err.timer, poll_catas, 0); + dev->catas_err.map = NULL; + + addr = pci_resource_start(dev->pdev, 0) + + ((pci_resource_len(dev->pdev, 0) - 1) & + dev->catas_err.addr); + + dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4); + if (!dev->catas_err.map) { + mthca_warn(dev, "couldn't map catastrophic error region " + "at 0x%llx/0x%x\n", (unsigned long long) addr, + dev->catas_err.size * 4); + return; + } + + dev->catas_err.timer.expires = jiffies + MTHCA_CATAS_POLL_INTERVAL; + INIT_LIST_HEAD(&dev->catas_err.list); + add_timer(&dev->catas_err.timer); +} + +void mthca_stop_catas_poll(struct mthca_dev *dev) +{ + del_timer_sync(&dev->catas_err.timer); + + if (dev->catas_err.map) + iounmap(dev->catas_err.map); + + spin_lock_irq(&catas_lock); + list_del(&dev->catas_err.list); + spin_unlock_irq(&catas_lock); +} + +int __init mthca_catas_init(void) +{ + INIT_WORK(&catas_work, catas_reset); + + catas_wq = alloc_ordered_workqueue("mthca_catas", WQ_MEM_RECLAIM); + if (!catas_wq) + return -ENOMEM; + + return 0; +} + +void mthca_catas_cleanup(void) +{ + destroy_workqueue(catas_wq); +} diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c new file mode 100644 index 000000000..0307c45aa --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_cmd.c @@ -0,0 +1,1971 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/completion.h> +#include <linux/pci.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <asm/io.h> +#include <rdma/ib_mad.h> + +#include "mthca_dev.h" +#include "mthca_config_reg.h" +#include "mthca_cmd.h" +#include "mthca_memfree.h" + +#define CMD_POLL_TOKEN 0xffff + +enum { + HCR_IN_PARAM_OFFSET = 0x00, + HCR_IN_MODIFIER_OFFSET = 0x08, + HCR_OUT_PARAM_OFFSET = 0x0c, + HCR_TOKEN_OFFSET = 0x14, + HCR_STATUS_OFFSET = 0x18, + + HCR_OPMOD_SHIFT = 12, + HCA_E_BIT = 22, + HCR_GO_BIT = 23 +}; + +enum { + /* initialization and general commands */ + CMD_SYS_EN = 0x1, + CMD_SYS_DIS = 0x2, + CMD_MAP_FA = 0xfff, + CMD_UNMAP_FA = 0xffe, + CMD_RUN_FW = 0xff6, + CMD_MOD_STAT_CFG = 0x34, + CMD_QUERY_DEV_LIM = 0x3, + CMD_QUERY_FW = 0x4, + CMD_ENABLE_LAM = 0xff8, + CMD_DISABLE_LAM = 0xff7, + CMD_QUERY_DDR = 0x5, + CMD_QUERY_ADAPTER = 0x6, + CMD_INIT_HCA = 0x7, + CMD_CLOSE_HCA = 0x8, + CMD_INIT_IB = 0x9, + CMD_CLOSE_IB = 0xa, + CMD_QUERY_HCA = 0xb, + CMD_SET_IB = 0xc, + CMD_ACCESS_DDR = 0x2e, + CMD_MAP_ICM = 0xffa, + CMD_UNMAP_ICM = 0xff9, + CMD_MAP_ICM_AUX = 0xffc, + CMD_UNMAP_ICM_AUX = 0xffb, + CMD_SET_ICM_SIZE = 0xffd, + + /* TPT commands */ + CMD_SW2HW_MPT = 0xd, + CMD_QUERY_MPT = 0xe, + CMD_HW2SW_MPT = 0xf, + CMD_READ_MTT = 0x10, + CMD_WRITE_MTT = 0x11, + CMD_SYNC_TPT = 0x2f, + + /* EQ commands */ + CMD_MAP_EQ = 0x12, + CMD_SW2HW_EQ = 0x13, + CMD_HW2SW_EQ = 0x14, + CMD_QUERY_EQ = 0x15, + + /* CQ commands */ + CMD_SW2HW_CQ = 0x16, + CMD_HW2SW_CQ = 0x17, + CMD_QUERY_CQ = 0x18, + CMD_RESIZE_CQ = 0x2c, + + /* SRQ commands */ + CMD_SW2HW_SRQ = 0x35, + CMD_HW2SW_SRQ = 0x36, + CMD_QUERY_SRQ = 0x37, + CMD_ARM_SRQ = 0x40, + + /* QP/EE commands */ + CMD_RST2INIT_QPEE = 0x19, + CMD_INIT2RTR_QPEE = 0x1a, + CMD_RTR2RTS_QPEE = 0x1b, + CMD_RTS2RTS_QPEE = 0x1c, + CMD_SQERR2RTS_QPEE = 0x1d, + CMD_2ERR_QPEE = 0x1e, + CMD_RTS2SQD_QPEE = 0x1f, + CMD_SQD2SQD_QPEE = 0x38, + CMD_SQD2RTS_QPEE = 0x20, + CMD_ERR2RST_QPEE = 0x21, + CMD_QUERY_QPEE = 0x22, + CMD_INIT2INIT_QPEE = 0x2d, + CMD_SUSPEND_QPEE = 0x32, + CMD_UNSUSPEND_QPEE = 0x33, + /* special QPs and management commands */ + CMD_CONF_SPECIAL_QP = 0x23, + CMD_MAD_IFC = 0x24, + + /* multicast commands */ + CMD_READ_MGM = 0x25, + CMD_WRITE_MGM = 0x26, + CMD_MGID_HASH = 0x27, + + /* miscellaneous commands */ + CMD_DIAG_RPRT = 0x30, + CMD_NOP = 0x31, + + /* debug commands */ + CMD_QUERY_DEBUG_MSG = 0x2a, + CMD_SET_DEBUG_MSG = 0x2b, +}; + +/* + * According to Mellanox code, FW may be starved and never complete + * commands. So we can't use strict timeouts described in PRM -- we + * just arbitrarily select 60 seconds for now. + */ +#if 0 +/* + * Round up and add 1 to make sure we get the full wait time (since we + * will be starting in the middle of a jiffy) + */ +enum { + CMD_TIME_CLASS_A = (HZ + 999) / 1000 + 1, + CMD_TIME_CLASS_B = (HZ + 99) / 100 + 1, + CMD_TIME_CLASS_C = (HZ + 9) / 10 + 1, + CMD_TIME_CLASS_D = 60 * HZ +}; +#else +enum { + CMD_TIME_CLASS_A = 60 * HZ, + CMD_TIME_CLASS_B = 60 * HZ, + CMD_TIME_CLASS_C = 60 * HZ, + CMD_TIME_CLASS_D = 60 * HZ +}; +#endif + +enum { + GO_BIT_TIMEOUT = HZ * 10 +}; + +struct mthca_cmd_context { + struct completion done; + int result; + int next; + u64 out_param; + u16 token; + u8 status; +}; + +static int fw_cmd_doorbell = 0; +module_param(fw_cmd_doorbell, int, 0644); +MODULE_PARM_DESC(fw_cmd_doorbell, "post FW commands through doorbell page if nonzero " + "(and supported by FW)"); + +static inline int go_bit(struct mthca_dev *dev) +{ + return readl(dev->hcr + HCR_STATUS_OFFSET) & + swab32(1 << HCR_GO_BIT); +} + +static void mthca_cmd_post_dbell(struct mthca_dev *dev, + u64 in_param, + u64 out_param, + u32 in_modifier, + u8 op_modifier, + u16 op, + u16 token) +{ + void __iomem *ptr = dev->cmd.dbell_map; + u16 *offs = dev->cmd.dbell_offsets; + + __raw_writel((__force u32) cpu_to_be32(in_param >> 32), ptr + offs[0]); + wmb(); + __raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful), ptr + offs[1]); + wmb(); + __raw_writel((__force u32) cpu_to_be32(in_modifier), ptr + offs[2]); + wmb(); + __raw_writel((__force u32) cpu_to_be32(out_param >> 32), ptr + offs[3]); + wmb(); + __raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), ptr + offs[4]); + wmb(); + __raw_writel((__force u32) cpu_to_be32(token << 16), ptr + offs[5]); + wmb(); + __raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT) | + (1 << HCA_E_BIT) | + (op_modifier << HCR_OPMOD_SHIFT) | + op), ptr + offs[6]); + wmb(); + __raw_writel((__force u32) 0, ptr + offs[7]); + wmb(); +} + +static int mthca_cmd_post_hcr(struct mthca_dev *dev, + u64 in_param, + u64 out_param, + u32 in_modifier, + u8 op_modifier, + u16 op, + u16 token, + int event) +{ + if (event) { + unsigned long end = jiffies + GO_BIT_TIMEOUT; + + while (go_bit(dev) && time_before(jiffies, end)) { + set_current_state(TASK_RUNNING); + schedule(); + } + } + + if (go_bit(dev)) + return -EAGAIN; + + /* + * We use writel (instead of something like memcpy_toio) + * because writes of less than 32 bits to the HCR don't work + * (and some architectures such as ia64 implement memcpy_toio + * in terms of writeb). + */ + __raw_writel((__force u32) cpu_to_be32(in_param >> 32), dev->hcr + 0 * 4); + __raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful), dev->hcr + 1 * 4); + __raw_writel((__force u32) cpu_to_be32(in_modifier), dev->hcr + 2 * 4); + __raw_writel((__force u32) cpu_to_be32(out_param >> 32), dev->hcr + 3 * 4); + __raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), dev->hcr + 4 * 4); + __raw_writel((__force u32) cpu_to_be32(token << 16), dev->hcr + 5 * 4); + + /* __raw_writel may not order writes. */ + wmb(); + + __raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT) | + (event ? (1 << HCA_E_BIT) : 0) | + (op_modifier << HCR_OPMOD_SHIFT) | + op), dev->hcr + 6 * 4); + + return 0; +} + +static int mthca_cmd_post(struct mthca_dev *dev, + u64 in_param, + u64 out_param, + u32 in_modifier, + u8 op_modifier, + u16 op, + u16 token, + int event) +{ + int err = 0; + + mutex_lock(&dev->cmd.hcr_mutex); + + if (event && dev->cmd.flags & MTHCA_CMD_POST_DOORBELLS && fw_cmd_doorbell) + mthca_cmd_post_dbell(dev, in_param, out_param, in_modifier, + op_modifier, op, token); + else + err = mthca_cmd_post_hcr(dev, in_param, out_param, in_modifier, + op_modifier, op, token, event); + + mutex_unlock(&dev->cmd.hcr_mutex); + return err; +} + + +static int mthca_status_to_errno(u8 status) +{ + static const int trans_table[] = { + [MTHCA_CMD_STAT_INTERNAL_ERR] = -EIO, + [MTHCA_CMD_STAT_BAD_OP] = -EPERM, + [MTHCA_CMD_STAT_BAD_PARAM] = -EINVAL, + [MTHCA_CMD_STAT_BAD_SYS_STATE] = -ENXIO, + [MTHCA_CMD_STAT_BAD_RESOURCE] = -EBADF, + [MTHCA_CMD_STAT_RESOURCE_BUSY] = -EBUSY, + [MTHCA_CMD_STAT_DDR_MEM_ERR] = -ENOMEM, + [MTHCA_CMD_STAT_EXCEED_LIM] = -ENOMEM, + [MTHCA_CMD_STAT_BAD_RES_STATE] = -EBADF, + [MTHCA_CMD_STAT_BAD_INDEX] = -EBADF, + [MTHCA_CMD_STAT_BAD_NVMEM] = -EFAULT, + [MTHCA_CMD_STAT_BAD_QPEE_STATE] = -EINVAL, + [MTHCA_CMD_STAT_BAD_SEG_PARAM] = -EFAULT, + [MTHCA_CMD_STAT_REG_BOUND] = -EBUSY, + [MTHCA_CMD_STAT_LAM_NOT_PRE] = -EAGAIN, + [MTHCA_CMD_STAT_BAD_PKT] = -EBADMSG, + [MTHCA_CMD_STAT_BAD_SIZE] = -ENOMEM, + }; + + if (status >= ARRAY_SIZE(trans_table) || + (status != MTHCA_CMD_STAT_OK + && trans_table[status] == 0)) + return -EINVAL; + + return trans_table[status]; +} + + +static int mthca_cmd_poll(struct mthca_dev *dev, + u64 in_param, + u64 *out_param, + int out_is_imm, + u32 in_modifier, + u8 op_modifier, + u16 op, + unsigned long timeout) +{ + int err = 0; + unsigned long end; + u8 status; + + down(&dev->cmd.poll_sem); + + err = mthca_cmd_post(dev, in_param, + out_param ? *out_param : 0, + in_modifier, op_modifier, + op, CMD_POLL_TOKEN, 0); + if (err) + goto out; + + end = timeout + jiffies; + while (go_bit(dev) && time_before(jiffies, end)) { + set_current_state(TASK_RUNNING); + schedule(); + } + + if (go_bit(dev)) { + err = -EBUSY; + goto out; + } + + if (out_is_imm && out_param) { + *out_param = + (u64) be32_to_cpu((__force __be32) + __raw_readl(dev->hcr + HCR_OUT_PARAM_OFFSET)) << 32 | + (u64) be32_to_cpu((__force __be32) + __raw_readl(dev->hcr + HCR_OUT_PARAM_OFFSET + 4)); + } else if (out_is_imm) { + err = -EINVAL; + goto out; + } + + status = be32_to_cpu((__force __be32) __raw_readl(dev->hcr + HCR_STATUS_OFFSET)) >> 24; + if (status) { + mthca_dbg(dev, "Command %02x completed with status %02x\n", + op, status); + err = mthca_status_to_errno(status); + } + +out: + up(&dev->cmd.poll_sem); + return err; +} + +void mthca_cmd_event(struct mthca_dev *dev, + u16 token, + u8 status, + u64 out_param) +{ + struct mthca_cmd_context *context = + &dev->cmd.context[token & dev->cmd.token_mask]; + + /* previously timed out command completing at long last */ + if (token != context->token) + return; + + context->result = 0; + context->status = status; + context->out_param = out_param; + + complete(&context->done); +} + +static int mthca_cmd_wait(struct mthca_dev *dev, + u64 in_param, + u64 *out_param, + int out_is_imm, + u32 in_modifier, + u8 op_modifier, + u16 op, + unsigned long timeout) +{ + int err = 0; + struct mthca_cmd_context *context; + + down(&dev->cmd.event_sem); + + spin_lock(&dev->cmd.context_lock); + BUG_ON(dev->cmd.free_head < 0); + context = &dev->cmd.context[dev->cmd.free_head]; + context->token += dev->cmd.token_mask + 1; + dev->cmd.free_head = context->next; + spin_unlock(&dev->cmd.context_lock); + + init_completion(&context->done); + + err = mthca_cmd_post(dev, in_param, + out_param ? *out_param : 0, + in_modifier, op_modifier, + op, context->token, 1); + if (err) + goto out; + + if (!wait_for_completion_timeout(&context->done, timeout)) { + err = -EBUSY; + goto out; + } + + err = context->result; + if (err) + goto out; + + if (context->status) { + mthca_dbg(dev, "Command %02x completed with status %02x\n", + op, context->status); + err = mthca_status_to_errno(context->status); + } + + if (out_is_imm && out_param) { + *out_param = context->out_param; + } else if (out_is_imm) { + err = -EINVAL; + goto out; + } + +out: + spin_lock(&dev->cmd.context_lock); + context->next = dev->cmd.free_head; + dev->cmd.free_head = context - dev->cmd.context; + spin_unlock(&dev->cmd.context_lock); + + up(&dev->cmd.event_sem); + return err; +} + +/* Invoke a command with an output mailbox */ +static int mthca_cmd_box(struct mthca_dev *dev, + u64 in_param, + u64 out_param, + u32 in_modifier, + u8 op_modifier, + u16 op, + unsigned long timeout) +{ + if (dev->cmd.flags & MTHCA_CMD_USE_EVENTS) + return mthca_cmd_wait(dev, in_param, &out_param, 0, + in_modifier, op_modifier, op, + timeout); + else + return mthca_cmd_poll(dev, in_param, &out_param, 0, + in_modifier, op_modifier, op, + timeout); +} + +/* Invoke a command with no output parameter */ +static int mthca_cmd(struct mthca_dev *dev, + u64 in_param, + u32 in_modifier, + u8 op_modifier, + u16 op, + unsigned long timeout) +{ + return mthca_cmd_box(dev, in_param, 0, in_modifier, + op_modifier, op, timeout); +} + +/* + * Invoke a command with an immediate output parameter (and copy the + * output into the caller's out_param pointer after the command + * executes). + */ +static int mthca_cmd_imm(struct mthca_dev *dev, + u64 in_param, + u64 *out_param, + u32 in_modifier, + u8 op_modifier, + u16 op, + unsigned long timeout) +{ + if (dev->cmd.flags & MTHCA_CMD_USE_EVENTS) + return mthca_cmd_wait(dev, in_param, out_param, 1, + in_modifier, op_modifier, op, + timeout); + else + return mthca_cmd_poll(dev, in_param, out_param, 1, + in_modifier, op_modifier, op, + timeout); +} + +int mthca_cmd_init(struct mthca_dev *dev) +{ + mutex_init(&dev->cmd.hcr_mutex); + sema_init(&dev->cmd.poll_sem, 1); + dev->cmd.flags = 0; + + dev->hcr = ioremap(pci_resource_start(dev->pdev, 0) + MTHCA_HCR_BASE, + MTHCA_HCR_SIZE); + if (!dev->hcr) { + mthca_err(dev, "Couldn't map command register."); + return -ENOMEM; + } + + dev->cmd.pool = dma_pool_create("mthca_cmd", &dev->pdev->dev, + MTHCA_MAILBOX_SIZE, + MTHCA_MAILBOX_SIZE, 0); + if (!dev->cmd.pool) { + iounmap(dev->hcr); + return -ENOMEM; + } + + return 0; +} + +void mthca_cmd_cleanup(struct mthca_dev *dev) +{ + dma_pool_destroy(dev->cmd.pool); + iounmap(dev->hcr); + if (dev->cmd.flags & MTHCA_CMD_POST_DOORBELLS) + iounmap(dev->cmd.dbell_map); +} + +/* + * Switch to using events to issue FW commands (should be called after + * event queue to command events has been initialized). + */ +int mthca_cmd_use_events(struct mthca_dev *dev) +{ + int i; + + dev->cmd.context = kmalloc_array(dev->cmd.max_cmds, + sizeof(struct mthca_cmd_context), + GFP_KERNEL); + if (!dev->cmd.context) + return -ENOMEM; + + for (i = 0; i < dev->cmd.max_cmds; ++i) { + dev->cmd.context[i].token = i; + dev->cmd.context[i].next = i + 1; + } + + dev->cmd.context[dev->cmd.max_cmds - 1].next = -1; + dev->cmd.free_head = 0; + + sema_init(&dev->cmd.event_sem, dev->cmd.max_cmds); + spin_lock_init(&dev->cmd.context_lock); + + for (dev->cmd.token_mask = 1; + dev->cmd.token_mask < dev->cmd.max_cmds; + dev->cmd.token_mask <<= 1) + ; /* nothing */ + --dev->cmd.token_mask; + + dev->cmd.flags |= MTHCA_CMD_USE_EVENTS; + + down(&dev->cmd.poll_sem); + + return 0; +} + +/* + * Switch back to polling (used when shutting down the device) + */ +void mthca_cmd_use_polling(struct mthca_dev *dev) +{ + int i; + + dev->cmd.flags &= ~MTHCA_CMD_USE_EVENTS; + + for (i = 0; i < dev->cmd.max_cmds; ++i) + down(&dev->cmd.event_sem); + + kfree(dev->cmd.context); + + up(&dev->cmd.poll_sem); +} + +struct mthca_mailbox *mthca_alloc_mailbox(struct mthca_dev *dev, + gfp_t gfp_mask) +{ + struct mthca_mailbox *mailbox; + + mailbox = kmalloc(sizeof *mailbox, gfp_mask); + if (!mailbox) + return ERR_PTR(-ENOMEM); + + mailbox->buf = dma_pool_alloc(dev->cmd.pool, gfp_mask, &mailbox->dma); + if (!mailbox->buf) { + kfree(mailbox); + return ERR_PTR(-ENOMEM); + } + + return mailbox; +} + +void mthca_free_mailbox(struct mthca_dev *dev, struct mthca_mailbox *mailbox) +{ + if (!mailbox) + return; + + dma_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma); + kfree(mailbox); +} + +int mthca_SYS_EN(struct mthca_dev *dev) +{ + u64 out = 0; + int ret; + + ret = mthca_cmd_imm(dev, 0, &out, 0, 0, CMD_SYS_EN, CMD_TIME_CLASS_D); + + if (ret == -ENOMEM) + mthca_warn(dev, "SYS_EN DDR error: syn=%x, sock=%d, " + "sladdr=%d, SPD source=%s\n", + (int) (out >> 6) & 0xf, (int) (out >> 4) & 3, + (int) (out >> 1) & 7, (int) out & 1 ? "NVMEM" : "DIMM"); + + return ret; +} + +int mthca_SYS_DIS(struct mthca_dev *dev) +{ + return mthca_cmd(dev, 0, 0, 0, CMD_SYS_DIS, CMD_TIME_CLASS_C); +} + +static int mthca_map_cmd(struct mthca_dev *dev, u16 op, struct mthca_icm *icm, + u64 virt) +{ + struct mthca_mailbox *mailbox; + struct mthca_icm_iter iter; + __be64 *pages; + int lg; + int nent = 0; + int i; + int err = 0; + int ts = 0, tc = 0; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + memset(mailbox->buf, 0, MTHCA_MAILBOX_SIZE); + pages = mailbox->buf; + + for (mthca_icm_first(icm, &iter); + !mthca_icm_last(&iter); + mthca_icm_next(&iter)) { + /* + * We have to pass pages that are aligned to their + * size, so find the least significant 1 in the + * address or size and use that as our log2 size. + */ + lg = ffs(mthca_icm_addr(&iter) | mthca_icm_size(&iter)) - 1; + if (lg < MTHCA_ICM_PAGE_SHIFT) { + mthca_warn(dev, "Got FW area not aligned to %d (%llx/%lx).\n", + MTHCA_ICM_PAGE_SIZE, + (unsigned long long) mthca_icm_addr(&iter), + mthca_icm_size(&iter)); + err = -EINVAL; + goto out; + } + for (i = 0; i < mthca_icm_size(&iter) >> lg; ++i) { + if (virt != -1) { + pages[nent * 2] = cpu_to_be64(virt); + virt += 1ULL << lg; + } + + pages[nent * 2 + 1] = + cpu_to_be64((mthca_icm_addr(&iter) + (i << lg)) | + (lg - MTHCA_ICM_PAGE_SHIFT)); + ts += 1 << (lg - 10); + ++tc; + + if (++nent == MTHCA_MAILBOX_SIZE / 16) { + err = mthca_cmd(dev, mailbox->dma, nent, 0, op, + CMD_TIME_CLASS_B); + if (err) + goto out; + nent = 0; + } + } + } + + if (nent) + err = mthca_cmd(dev, mailbox->dma, nent, 0, op, + CMD_TIME_CLASS_B); + + switch (op) { + case CMD_MAP_FA: + mthca_dbg(dev, "Mapped %d chunks/%d KB for FW.\n", tc, ts); + break; + case CMD_MAP_ICM_AUX: + mthca_dbg(dev, "Mapped %d chunks/%d KB for ICM aux.\n", tc, ts); + break; + case CMD_MAP_ICM: + mthca_dbg(dev, "Mapped %d chunks/%d KB at %llx for ICM.\n", + tc, ts, (unsigned long long) virt - (ts << 10)); + break; + } + +out: + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_MAP_FA(struct mthca_dev *dev, struct mthca_icm *icm) +{ + return mthca_map_cmd(dev, CMD_MAP_FA, icm, -1); +} + +int mthca_UNMAP_FA(struct mthca_dev *dev) +{ + return mthca_cmd(dev, 0, 0, 0, CMD_UNMAP_FA, CMD_TIME_CLASS_B); +} + +int mthca_RUN_FW(struct mthca_dev *dev) +{ + return mthca_cmd(dev, 0, 0, 0, CMD_RUN_FW, CMD_TIME_CLASS_A); +} + +static void mthca_setup_cmd_doorbells(struct mthca_dev *dev, u64 base) +{ + phys_addr_t addr; + u16 max_off = 0; + int i; + + for (i = 0; i < 8; ++i) + max_off = max(max_off, dev->cmd.dbell_offsets[i]); + + if ((base & PAGE_MASK) != ((base + max_off) & PAGE_MASK)) { + mthca_warn(dev, "Firmware doorbell region at 0x%016llx, " + "length 0x%x crosses a page boundary\n", + (unsigned long long) base, max_off); + return; + } + + addr = pci_resource_start(dev->pdev, 2) + + ((pci_resource_len(dev->pdev, 2) - 1) & base); + dev->cmd.dbell_map = ioremap(addr, max_off + sizeof(u32)); + if (!dev->cmd.dbell_map) + return; + + dev->cmd.flags |= MTHCA_CMD_POST_DOORBELLS; + mthca_dbg(dev, "Mapped doorbell page for posting FW commands\n"); +} + +int mthca_QUERY_FW(struct mthca_dev *dev) +{ + struct mthca_mailbox *mailbox; + u32 *outbox; + u64 base; + u32 tmp; + int err = 0; + u8 lg; + int i; + +#define QUERY_FW_OUT_SIZE 0x100 +#define QUERY_FW_VER_OFFSET 0x00 +#define QUERY_FW_MAX_CMD_OFFSET 0x0f +#define QUERY_FW_ERR_START_OFFSET 0x30 +#define QUERY_FW_ERR_SIZE_OFFSET 0x38 + +#define QUERY_FW_CMD_DB_EN_OFFSET 0x10 +#define QUERY_FW_CMD_DB_OFFSET 0x50 +#define QUERY_FW_CMD_DB_BASE 0x60 + +#define QUERY_FW_START_OFFSET 0x20 +#define QUERY_FW_END_OFFSET 0x28 + +#define QUERY_FW_SIZE_OFFSET 0x00 +#define QUERY_FW_CLR_INT_BASE_OFFSET 0x20 +#define QUERY_FW_EQ_ARM_BASE_OFFSET 0x40 +#define QUERY_FW_EQ_SET_CI_BASE_OFFSET 0x48 + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + outbox = mailbox->buf; + + err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_QUERY_FW, + CMD_TIME_CLASS_A); + + if (err) + goto out; + + MTHCA_GET(dev->fw_ver, outbox, QUERY_FW_VER_OFFSET); + /* + * FW subminor version is at more significant bits than minor + * version, so swap here. + */ + dev->fw_ver = (dev->fw_ver & 0xffff00000000ull) | + ((dev->fw_ver & 0xffff0000ull) >> 16) | + ((dev->fw_ver & 0x0000ffffull) << 16); + + MTHCA_GET(lg, outbox, QUERY_FW_MAX_CMD_OFFSET); + dev->cmd.max_cmds = 1 << lg; + + mthca_dbg(dev, "FW version %012llx, max commands %d\n", + (unsigned long long) dev->fw_ver, dev->cmd.max_cmds); + + MTHCA_GET(dev->catas_err.addr, outbox, QUERY_FW_ERR_START_OFFSET); + MTHCA_GET(dev->catas_err.size, outbox, QUERY_FW_ERR_SIZE_OFFSET); + + mthca_dbg(dev, "Catastrophic error buffer at 0x%llx, size 0x%x\n", + (unsigned long long) dev->catas_err.addr, dev->catas_err.size); + + MTHCA_GET(tmp, outbox, QUERY_FW_CMD_DB_EN_OFFSET); + if (tmp & 0x1) { + mthca_dbg(dev, "FW supports commands through doorbells\n"); + + MTHCA_GET(base, outbox, QUERY_FW_CMD_DB_BASE); + for (i = 0; i < MTHCA_CMD_NUM_DBELL_DWORDS; ++i) + MTHCA_GET(dev->cmd.dbell_offsets[i], outbox, + QUERY_FW_CMD_DB_OFFSET + (i << 1)); + + mthca_setup_cmd_doorbells(dev, base); + } + + if (mthca_is_memfree(dev)) { + MTHCA_GET(dev->fw.arbel.fw_pages, outbox, QUERY_FW_SIZE_OFFSET); + MTHCA_GET(dev->fw.arbel.clr_int_base, outbox, QUERY_FW_CLR_INT_BASE_OFFSET); + MTHCA_GET(dev->fw.arbel.eq_arm_base, outbox, QUERY_FW_EQ_ARM_BASE_OFFSET); + MTHCA_GET(dev->fw.arbel.eq_set_ci_base, outbox, QUERY_FW_EQ_SET_CI_BASE_OFFSET); + mthca_dbg(dev, "FW size %d KB\n", dev->fw.arbel.fw_pages << 2); + + /* + * Round up number of system pages needed in case + * MTHCA_ICM_PAGE_SIZE < PAGE_SIZE. + */ + dev->fw.arbel.fw_pages = + ALIGN(dev->fw.arbel.fw_pages, PAGE_SIZE / MTHCA_ICM_PAGE_SIZE) >> + (PAGE_SHIFT - MTHCA_ICM_PAGE_SHIFT); + + mthca_dbg(dev, "Clear int @ %llx, EQ arm @ %llx, EQ set CI @ %llx\n", + (unsigned long long) dev->fw.arbel.clr_int_base, + (unsigned long long) dev->fw.arbel.eq_arm_base, + (unsigned long long) dev->fw.arbel.eq_set_ci_base); + } else { + MTHCA_GET(dev->fw.tavor.fw_start, outbox, QUERY_FW_START_OFFSET); + MTHCA_GET(dev->fw.tavor.fw_end, outbox, QUERY_FW_END_OFFSET); + + mthca_dbg(dev, "FW size %d KB (start %llx, end %llx)\n", + (int) ((dev->fw.tavor.fw_end - dev->fw.tavor.fw_start) >> 10), + (unsigned long long) dev->fw.tavor.fw_start, + (unsigned long long) dev->fw.tavor.fw_end); + } + +out: + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_ENABLE_LAM(struct mthca_dev *dev) +{ + struct mthca_mailbox *mailbox; + u8 info; + u32 *outbox; + int err = 0; + +#define ENABLE_LAM_OUT_SIZE 0x100 +#define ENABLE_LAM_START_OFFSET 0x00 +#define ENABLE_LAM_END_OFFSET 0x08 +#define ENABLE_LAM_INFO_OFFSET 0x13 + +#define ENABLE_LAM_INFO_HIDDEN_FLAG (1 << 4) +#define ENABLE_LAM_INFO_ECC_MASK 0x3 + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + outbox = mailbox->buf; + + err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_ENABLE_LAM, + CMD_TIME_CLASS_C); + + if (err) + goto out; + + MTHCA_GET(dev->ddr_start, outbox, ENABLE_LAM_START_OFFSET); + MTHCA_GET(dev->ddr_end, outbox, ENABLE_LAM_END_OFFSET); + MTHCA_GET(info, outbox, ENABLE_LAM_INFO_OFFSET); + + if (!!(info & ENABLE_LAM_INFO_HIDDEN_FLAG) != + !!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) { + mthca_info(dev, "FW reports that HCA-attached memory " + "is %s hidden; does not match PCI config\n", + (info & ENABLE_LAM_INFO_HIDDEN_FLAG) ? + "" : "not"); + } + if (info & ENABLE_LAM_INFO_HIDDEN_FLAG) + mthca_dbg(dev, "HCA-attached memory is hidden.\n"); + + mthca_dbg(dev, "HCA memory size %d KB (start %llx, end %llx)\n", + (int) ((dev->ddr_end - dev->ddr_start) >> 10), + (unsigned long long) dev->ddr_start, + (unsigned long long) dev->ddr_end); + +out: + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_DISABLE_LAM(struct mthca_dev *dev) +{ + return mthca_cmd(dev, 0, 0, 0, CMD_SYS_DIS, CMD_TIME_CLASS_C); +} + +int mthca_QUERY_DDR(struct mthca_dev *dev) +{ + struct mthca_mailbox *mailbox; + u8 info; + u32 *outbox; + int err = 0; + +#define QUERY_DDR_OUT_SIZE 0x100 +#define QUERY_DDR_START_OFFSET 0x00 +#define QUERY_DDR_END_OFFSET 0x08 +#define QUERY_DDR_INFO_OFFSET 0x13 + +#define QUERY_DDR_INFO_HIDDEN_FLAG (1 << 4) +#define QUERY_DDR_INFO_ECC_MASK 0x3 + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + outbox = mailbox->buf; + + err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_QUERY_DDR, + CMD_TIME_CLASS_A); + + if (err) + goto out; + + MTHCA_GET(dev->ddr_start, outbox, QUERY_DDR_START_OFFSET); + MTHCA_GET(dev->ddr_end, outbox, QUERY_DDR_END_OFFSET); + MTHCA_GET(info, outbox, QUERY_DDR_INFO_OFFSET); + + if (!!(info & QUERY_DDR_INFO_HIDDEN_FLAG) != + !!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) { + mthca_info(dev, "FW reports that HCA-attached memory " + "is %s hidden; does not match PCI config\n", + (info & QUERY_DDR_INFO_HIDDEN_FLAG) ? + "" : "not"); + } + if (info & QUERY_DDR_INFO_HIDDEN_FLAG) + mthca_dbg(dev, "HCA-attached memory is hidden.\n"); + + mthca_dbg(dev, "HCA memory size %d KB (start %llx, end %llx)\n", + (int) ((dev->ddr_end - dev->ddr_start) >> 10), + (unsigned long long) dev->ddr_start, + (unsigned long long) dev->ddr_end); + +out: + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_QUERY_DEV_LIM(struct mthca_dev *dev, + struct mthca_dev_lim *dev_lim) +{ + struct mthca_mailbox *mailbox; + u32 *outbox; + u8 field; + u16 size; + u16 stat_rate; + int err; + +#define QUERY_DEV_LIM_OUT_SIZE 0x100 +#define QUERY_DEV_LIM_MAX_SRQ_SZ_OFFSET 0x10 +#define QUERY_DEV_LIM_MAX_QP_SZ_OFFSET 0x11 +#define QUERY_DEV_LIM_RSVD_QP_OFFSET 0x12 +#define QUERY_DEV_LIM_MAX_QP_OFFSET 0x13 +#define QUERY_DEV_LIM_RSVD_SRQ_OFFSET 0x14 +#define QUERY_DEV_LIM_MAX_SRQ_OFFSET 0x15 +#define QUERY_DEV_LIM_RSVD_EEC_OFFSET 0x16 +#define QUERY_DEV_LIM_MAX_EEC_OFFSET 0x17 +#define QUERY_DEV_LIM_MAX_CQ_SZ_OFFSET 0x19 +#define QUERY_DEV_LIM_RSVD_CQ_OFFSET 0x1a +#define QUERY_DEV_LIM_MAX_CQ_OFFSET 0x1b +#define QUERY_DEV_LIM_MAX_MPT_OFFSET 0x1d +#define QUERY_DEV_LIM_RSVD_EQ_OFFSET 0x1e +#define QUERY_DEV_LIM_MAX_EQ_OFFSET 0x1f +#define QUERY_DEV_LIM_RSVD_MTT_OFFSET 0x20 +#define QUERY_DEV_LIM_MAX_MRW_SZ_OFFSET 0x21 +#define QUERY_DEV_LIM_RSVD_MRW_OFFSET 0x22 +#define QUERY_DEV_LIM_MAX_MTT_SEG_OFFSET 0x23 +#define QUERY_DEV_LIM_MAX_AV_OFFSET 0x27 +#define QUERY_DEV_LIM_MAX_REQ_QP_OFFSET 0x29 +#define QUERY_DEV_LIM_MAX_RES_QP_OFFSET 0x2b +#define QUERY_DEV_LIM_MAX_RDMA_OFFSET 0x2f +#define QUERY_DEV_LIM_RSZ_SRQ_OFFSET 0x33 +#define QUERY_DEV_LIM_ACK_DELAY_OFFSET 0x35 +#define QUERY_DEV_LIM_MTU_WIDTH_OFFSET 0x36 +#define QUERY_DEV_LIM_VL_PORT_OFFSET 0x37 +#define QUERY_DEV_LIM_MAX_GID_OFFSET 0x3b +#define QUERY_DEV_LIM_RATE_SUPPORT_OFFSET 0x3c +#define QUERY_DEV_LIM_MAX_PKEY_OFFSET 0x3f +#define QUERY_DEV_LIM_FLAGS_OFFSET 0x44 +#define QUERY_DEV_LIM_RSVD_UAR_OFFSET 0x48 +#define QUERY_DEV_LIM_UAR_SZ_OFFSET 0x49 +#define QUERY_DEV_LIM_PAGE_SZ_OFFSET 0x4b +#define QUERY_DEV_LIM_MAX_SG_OFFSET 0x51 +#define QUERY_DEV_LIM_MAX_DESC_SZ_OFFSET 0x52 +#define QUERY_DEV_LIM_MAX_SG_RQ_OFFSET 0x55 +#define QUERY_DEV_LIM_MAX_DESC_SZ_RQ_OFFSET 0x56 +#define QUERY_DEV_LIM_MAX_QP_MCG_OFFSET 0x61 +#define QUERY_DEV_LIM_RSVD_MCG_OFFSET 0x62 +#define QUERY_DEV_LIM_MAX_MCG_OFFSET 0x63 +#define QUERY_DEV_LIM_RSVD_PD_OFFSET 0x64 +#define QUERY_DEV_LIM_MAX_PD_OFFSET 0x65 +#define QUERY_DEV_LIM_RSVD_RDD_OFFSET 0x66 +#define QUERY_DEV_LIM_MAX_RDD_OFFSET 0x67 +#define QUERY_DEV_LIM_EEC_ENTRY_SZ_OFFSET 0x80 +#define QUERY_DEV_LIM_QPC_ENTRY_SZ_OFFSET 0x82 +#define QUERY_DEV_LIM_EEEC_ENTRY_SZ_OFFSET 0x84 +#define QUERY_DEV_LIM_EQPC_ENTRY_SZ_OFFSET 0x86 +#define QUERY_DEV_LIM_EQC_ENTRY_SZ_OFFSET 0x88 +#define QUERY_DEV_LIM_CQC_ENTRY_SZ_OFFSET 0x8a +#define QUERY_DEV_LIM_SRQ_ENTRY_SZ_OFFSET 0x8c +#define QUERY_DEV_LIM_UAR_ENTRY_SZ_OFFSET 0x8e +#define QUERY_DEV_LIM_MTT_ENTRY_SZ_OFFSET 0x90 +#define QUERY_DEV_LIM_MPT_ENTRY_SZ_OFFSET 0x92 +#define QUERY_DEV_LIM_PBL_SZ_OFFSET 0x96 +#define QUERY_DEV_LIM_BMME_FLAGS_OFFSET 0x97 +#define QUERY_DEV_LIM_RSVD_LKEY_OFFSET 0x98 +#define QUERY_DEV_LIM_LAMR_OFFSET 0x9f +#define QUERY_DEV_LIM_MAX_ICM_SZ_OFFSET 0xa0 + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + outbox = mailbox->buf; + + err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_QUERY_DEV_LIM, + CMD_TIME_CLASS_A); + + if (err) + goto out; + + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_QP_OFFSET); + dev_lim->reserved_qps = 1 << (field & 0xf); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_OFFSET); + dev_lim->max_qps = 1 << (field & 0x1f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_SRQ_OFFSET); + dev_lim->reserved_srqs = 1 << (field >> 4); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SRQ_OFFSET); + dev_lim->max_srqs = 1 << (field & 0x1f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_EEC_OFFSET); + dev_lim->reserved_eecs = 1 << (field & 0xf); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_EEC_OFFSET); + dev_lim->max_eecs = 1 << (field & 0x1f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_CQ_SZ_OFFSET); + dev_lim->max_cq_sz = 1 << field; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_CQ_OFFSET); + dev_lim->reserved_cqs = 1 << (field & 0xf); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_CQ_OFFSET); + dev_lim->max_cqs = 1 << (field & 0x1f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_MPT_OFFSET); + dev_lim->max_mpts = 1 << (field & 0x3f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_EQ_OFFSET); + dev_lim->reserved_eqs = 1 << (field & 0xf); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_EQ_OFFSET); + dev_lim->max_eqs = 1 << (field & 0x7); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_MTT_OFFSET); + if (mthca_is_memfree(dev)) + dev_lim->reserved_mtts = ALIGN((1 << (field >> 4)) * sizeof(u64), + dev->limits.mtt_seg_size) / dev->limits.mtt_seg_size; + else + dev_lim->reserved_mtts = 1 << (field >> 4); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_MRW_SZ_OFFSET); + dev_lim->max_mrw_sz = 1 << field; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_MRW_OFFSET); + dev_lim->reserved_mrws = 1 << (field & 0xf); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_MTT_SEG_OFFSET); + dev_lim->max_mtt_seg = 1 << (field & 0x3f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_REQ_QP_OFFSET); + dev_lim->max_requester_per_qp = 1 << (field & 0x3f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_RES_QP_OFFSET); + dev_lim->max_responder_per_qp = 1 << (field & 0x3f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_RDMA_OFFSET); + dev_lim->max_rdma_global = 1 << (field & 0x3f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_ACK_DELAY_OFFSET); + dev_lim->local_ca_ack_delay = field & 0x1f; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MTU_WIDTH_OFFSET); + dev_lim->max_mtu = field >> 4; + dev_lim->max_port_width = field & 0xf; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_VL_PORT_OFFSET); + dev_lim->max_vl = field >> 4; + dev_lim->num_ports = field & 0xf; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_GID_OFFSET); + dev_lim->max_gids = 1 << (field & 0xf); + MTHCA_GET(stat_rate, outbox, QUERY_DEV_LIM_RATE_SUPPORT_OFFSET); + dev_lim->stat_rate_support = stat_rate; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_PKEY_OFFSET); + dev_lim->max_pkeys = 1 << (field & 0xf); + MTHCA_GET(dev_lim->flags, outbox, QUERY_DEV_LIM_FLAGS_OFFSET); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_UAR_OFFSET); + dev_lim->reserved_uars = field >> 4; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_UAR_SZ_OFFSET); + dev_lim->uar_size = 1 << ((field & 0x3f) + 20); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_PAGE_SZ_OFFSET); + dev_lim->min_page_sz = 1 << field; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SG_OFFSET); + dev_lim->max_sg = field; + + MTHCA_GET(size, outbox, QUERY_DEV_LIM_MAX_DESC_SZ_OFFSET); + dev_lim->max_desc_sz = size; + + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_MCG_OFFSET); + dev_lim->max_qp_per_mcg = 1 << field; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_MCG_OFFSET); + dev_lim->reserved_mgms = field & 0xf; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_MCG_OFFSET); + dev_lim->max_mcgs = 1 << field; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_PD_OFFSET); + dev_lim->reserved_pds = field >> 4; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_PD_OFFSET); + dev_lim->max_pds = 1 << (field & 0x3f); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_RDD_OFFSET); + dev_lim->reserved_rdds = field >> 4; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_RDD_OFFSET); + dev_lim->max_rdds = 1 << (field & 0x3f); + + MTHCA_GET(size, outbox, QUERY_DEV_LIM_EEC_ENTRY_SZ_OFFSET); + dev_lim->eec_entry_sz = size; + MTHCA_GET(size, outbox, QUERY_DEV_LIM_QPC_ENTRY_SZ_OFFSET); + dev_lim->qpc_entry_sz = size; + MTHCA_GET(size, outbox, QUERY_DEV_LIM_EEEC_ENTRY_SZ_OFFSET); + dev_lim->eeec_entry_sz = size; + MTHCA_GET(size, outbox, QUERY_DEV_LIM_EQPC_ENTRY_SZ_OFFSET); + dev_lim->eqpc_entry_sz = size; + MTHCA_GET(size, outbox, QUERY_DEV_LIM_EQC_ENTRY_SZ_OFFSET); + dev_lim->eqc_entry_sz = size; + MTHCA_GET(size, outbox, QUERY_DEV_LIM_CQC_ENTRY_SZ_OFFSET); + dev_lim->cqc_entry_sz = size; + MTHCA_GET(size, outbox, QUERY_DEV_LIM_SRQ_ENTRY_SZ_OFFSET); + dev_lim->srq_entry_sz = size; + MTHCA_GET(size, outbox, QUERY_DEV_LIM_UAR_ENTRY_SZ_OFFSET); + dev_lim->uar_scratch_entry_sz = size; + + if (mthca_is_memfree(dev)) { + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SRQ_SZ_OFFSET); + dev_lim->max_srq_sz = 1 << field; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_SZ_OFFSET); + dev_lim->max_qp_sz = 1 << field; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSZ_SRQ_OFFSET); + dev_lim->hca.arbel.resize_srq = field & 1; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SG_RQ_OFFSET); + dev_lim->max_sg = min_t(int, field, dev_lim->max_sg); + MTHCA_GET(size, outbox, QUERY_DEV_LIM_MAX_DESC_SZ_RQ_OFFSET); + dev_lim->max_desc_sz = min_t(int, size, dev_lim->max_desc_sz); + MTHCA_GET(size, outbox, QUERY_DEV_LIM_MPT_ENTRY_SZ_OFFSET); + dev_lim->mpt_entry_sz = size; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_PBL_SZ_OFFSET); + dev_lim->hca.arbel.max_pbl_sz = 1 << (field & 0x3f); + MTHCA_GET(dev_lim->hca.arbel.bmme_flags, outbox, + QUERY_DEV_LIM_BMME_FLAGS_OFFSET); + MTHCA_GET(dev_lim->hca.arbel.reserved_lkey, outbox, + QUERY_DEV_LIM_RSVD_LKEY_OFFSET); + MTHCA_GET(field, outbox, QUERY_DEV_LIM_LAMR_OFFSET); + dev_lim->hca.arbel.lam_required = field & 1; + MTHCA_GET(dev_lim->hca.arbel.max_icm_sz, outbox, + QUERY_DEV_LIM_MAX_ICM_SZ_OFFSET); + + if (dev_lim->hca.arbel.bmme_flags & 1) + mthca_dbg(dev, "Base MM extensions: yes " + "(flags %d, max PBL %d, rsvd L_Key %08x)\n", + dev_lim->hca.arbel.bmme_flags, + dev_lim->hca.arbel.max_pbl_sz, + dev_lim->hca.arbel.reserved_lkey); + else + mthca_dbg(dev, "Base MM extensions: no\n"); + + mthca_dbg(dev, "Max ICM size %lld MB\n", + (unsigned long long) dev_lim->hca.arbel.max_icm_sz >> 20); + } else { + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SRQ_SZ_OFFSET); + dev_lim->max_srq_sz = (1 << field) - 1; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_SZ_OFFSET); + dev_lim->max_qp_sz = (1 << field) - 1; + MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_AV_OFFSET); + dev_lim->hca.tavor.max_avs = 1 << (field & 0x3f); + dev_lim->mpt_entry_sz = MTHCA_MPT_ENTRY_SIZE; + } + + mthca_dbg(dev, "Max QPs: %d, reserved QPs: %d, entry size: %d\n", + dev_lim->max_qps, dev_lim->reserved_qps, dev_lim->qpc_entry_sz); + mthca_dbg(dev, "Max SRQs: %d, reserved SRQs: %d, entry size: %d\n", + dev_lim->max_srqs, dev_lim->reserved_srqs, dev_lim->srq_entry_sz); + mthca_dbg(dev, "Max CQs: %d, reserved CQs: %d, entry size: %d\n", + dev_lim->max_cqs, dev_lim->reserved_cqs, dev_lim->cqc_entry_sz); + mthca_dbg(dev, "Max EQs: %d, reserved EQs: %d, entry size: %d\n", + dev_lim->max_eqs, dev_lim->reserved_eqs, dev_lim->eqc_entry_sz); + mthca_dbg(dev, "reserved MPTs: %d, reserved MTTs: %d\n", + dev_lim->reserved_mrws, dev_lim->reserved_mtts); + mthca_dbg(dev, "Max PDs: %d, reserved PDs: %d, reserved UARs: %d\n", + dev_lim->max_pds, dev_lim->reserved_pds, dev_lim->reserved_uars); + mthca_dbg(dev, "Max QP/MCG: %d, reserved MGMs: %d\n", + dev_lim->max_pds, dev_lim->reserved_mgms); + mthca_dbg(dev, "Max CQEs: %d, max WQEs: %d, max SRQ WQEs: %d\n", + dev_lim->max_cq_sz, dev_lim->max_qp_sz, dev_lim->max_srq_sz); + + mthca_dbg(dev, "Flags: %08x\n", dev_lim->flags); + +out: + mthca_free_mailbox(dev, mailbox); + return err; +} + +static void get_board_id(void *vsd, char *board_id) +{ + int i; + +#define VSD_OFFSET_SIG1 0x00 +#define VSD_OFFSET_SIG2 0xde +#define VSD_OFFSET_MLX_BOARD_ID 0xd0 +#define VSD_OFFSET_TS_BOARD_ID 0x20 + +#define VSD_SIGNATURE_TOPSPIN 0x5ad + + memset(board_id, 0, MTHCA_BOARD_ID_LEN); + + if (be16_to_cpup(vsd + VSD_OFFSET_SIG1) == VSD_SIGNATURE_TOPSPIN && + be16_to_cpup(vsd + VSD_OFFSET_SIG2) == VSD_SIGNATURE_TOPSPIN) { + strlcpy(board_id, vsd + VSD_OFFSET_TS_BOARD_ID, MTHCA_BOARD_ID_LEN); + } else { + /* + * The board ID is a string but the firmware byte + * swaps each 4-byte word before passing it back to + * us. Therefore we need to swab it before printing. + */ + for (i = 0; i < 4; ++i) + ((u32 *) board_id)[i] = + swab32(*(u32 *) (vsd + VSD_OFFSET_MLX_BOARD_ID + i * 4)); + } +} + +int mthca_QUERY_ADAPTER(struct mthca_dev *dev, + struct mthca_adapter *adapter) +{ + struct mthca_mailbox *mailbox; + u32 *outbox; + int err; + +#define QUERY_ADAPTER_OUT_SIZE 0x100 +#define QUERY_ADAPTER_VENDOR_ID_OFFSET 0x00 +#define QUERY_ADAPTER_DEVICE_ID_OFFSET 0x04 +#define QUERY_ADAPTER_REVISION_ID_OFFSET 0x08 +#define QUERY_ADAPTER_INTA_PIN_OFFSET 0x10 +#define QUERY_ADAPTER_VSD_OFFSET 0x20 + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + outbox = mailbox->buf; + + err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_QUERY_ADAPTER, + CMD_TIME_CLASS_A); + + if (err) + goto out; + + if (!mthca_is_memfree(dev)) { + MTHCA_GET(adapter->vendor_id, outbox, + QUERY_ADAPTER_VENDOR_ID_OFFSET); + MTHCA_GET(adapter->device_id, outbox, + QUERY_ADAPTER_DEVICE_ID_OFFSET); + MTHCA_GET(adapter->revision_id, outbox, + QUERY_ADAPTER_REVISION_ID_OFFSET); + } + MTHCA_GET(adapter->inta_pin, outbox, QUERY_ADAPTER_INTA_PIN_OFFSET); + + get_board_id(outbox + QUERY_ADAPTER_VSD_OFFSET / 4, + adapter->board_id); + +out: + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_INIT_HCA(struct mthca_dev *dev, + struct mthca_init_hca_param *param) +{ + struct mthca_mailbox *mailbox; + __be32 *inbox; + int err; + +#define INIT_HCA_IN_SIZE 0x200 +#define INIT_HCA_FLAGS1_OFFSET 0x00c +#define INIT_HCA_FLAGS2_OFFSET 0x014 +#define INIT_HCA_QPC_OFFSET 0x020 +#define INIT_HCA_QPC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x10) +#define INIT_HCA_LOG_QP_OFFSET (INIT_HCA_QPC_OFFSET + 0x17) +#define INIT_HCA_EEC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x20) +#define INIT_HCA_LOG_EEC_OFFSET (INIT_HCA_QPC_OFFSET + 0x27) +#define INIT_HCA_SRQC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x28) +#define INIT_HCA_LOG_SRQ_OFFSET (INIT_HCA_QPC_OFFSET + 0x2f) +#define INIT_HCA_CQC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x30) +#define INIT_HCA_LOG_CQ_OFFSET (INIT_HCA_QPC_OFFSET + 0x37) +#define INIT_HCA_EQPC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x40) +#define INIT_HCA_EEEC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x50) +#define INIT_HCA_EQC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x60) +#define INIT_HCA_LOG_EQ_OFFSET (INIT_HCA_QPC_OFFSET + 0x67) +#define INIT_HCA_RDB_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x70) +#define INIT_HCA_UDAV_OFFSET 0x0b0 +#define INIT_HCA_UDAV_LKEY_OFFSET (INIT_HCA_UDAV_OFFSET + 0x0) +#define INIT_HCA_UDAV_PD_OFFSET (INIT_HCA_UDAV_OFFSET + 0x4) +#define INIT_HCA_MCAST_OFFSET 0x0c0 +#define INIT_HCA_MC_BASE_OFFSET (INIT_HCA_MCAST_OFFSET + 0x00) +#define INIT_HCA_LOG_MC_ENTRY_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x12) +#define INIT_HCA_MC_HASH_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x16) +#define INIT_HCA_LOG_MC_TABLE_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x1b) +#define INIT_HCA_TPT_OFFSET 0x0f0 +#define INIT_HCA_MPT_BASE_OFFSET (INIT_HCA_TPT_OFFSET + 0x00) +#define INIT_HCA_MTT_SEG_SZ_OFFSET (INIT_HCA_TPT_OFFSET + 0x09) +#define INIT_HCA_LOG_MPT_SZ_OFFSET (INIT_HCA_TPT_OFFSET + 0x0b) +#define INIT_HCA_MTT_BASE_OFFSET (INIT_HCA_TPT_OFFSET + 0x10) +#define INIT_HCA_UAR_OFFSET 0x120 +#define INIT_HCA_UAR_BASE_OFFSET (INIT_HCA_UAR_OFFSET + 0x00) +#define INIT_HCA_UARC_SZ_OFFSET (INIT_HCA_UAR_OFFSET + 0x09) +#define INIT_HCA_LOG_UAR_SZ_OFFSET (INIT_HCA_UAR_OFFSET + 0x0a) +#define INIT_HCA_UAR_PAGE_SZ_OFFSET (INIT_HCA_UAR_OFFSET + 0x0b) +#define INIT_HCA_UAR_SCATCH_BASE_OFFSET (INIT_HCA_UAR_OFFSET + 0x10) +#define INIT_HCA_UAR_CTX_BASE_OFFSET (INIT_HCA_UAR_OFFSET + 0x18) + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + inbox = mailbox->buf; + + memset(inbox, 0, INIT_HCA_IN_SIZE); + + if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT) + MTHCA_PUT(inbox, 0x1, INIT_HCA_FLAGS1_OFFSET); + +#if defined(__LITTLE_ENDIAN) + *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) &= ~cpu_to_be32(1 << 1); +#elif defined(__BIG_ENDIAN) + *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) |= cpu_to_be32(1 << 1); +#else +#error Host endianness not defined +#endif + /* Check port for UD address vector: */ + *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) |= cpu_to_be32(1); + + /* Enable IPoIB checksumming if we can: */ + if (dev->device_cap_flags & IB_DEVICE_UD_IP_CSUM) + *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) |= cpu_to_be32(7 << 3); + + /* We leave wqe_quota, responder_exu, etc as 0 (default) */ + + /* QPC/EEC/CQC/EQC/RDB attributes */ + + MTHCA_PUT(inbox, param->qpc_base, INIT_HCA_QPC_BASE_OFFSET); + MTHCA_PUT(inbox, param->log_num_qps, INIT_HCA_LOG_QP_OFFSET); + MTHCA_PUT(inbox, param->eec_base, INIT_HCA_EEC_BASE_OFFSET); + MTHCA_PUT(inbox, param->log_num_eecs, INIT_HCA_LOG_EEC_OFFSET); + MTHCA_PUT(inbox, param->srqc_base, INIT_HCA_SRQC_BASE_OFFSET); + MTHCA_PUT(inbox, param->log_num_srqs, INIT_HCA_LOG_SRQ_OFFSET); + MTHCA_PUT(inbox, param->cqc_base, INIT_HCA_CQC_BASE_OFFSET); + MTHCA_PUT(inbox, param->log_num_cqs, INIT_HCA_LOG_CQ_OFFSET); + MTHCA_PUT(inbox, param->eqpc_base, INIT_HCA_EQPC_BASE_OFFSET); + MTHCA_PUT(inbox, param->eeec_base, INIT_HCA_EEEC_BASE_OFFSET); + MTHCA_PUT(inbox, param->eqc_base, INIT_HCA_EQC_BASE_OFFSET); + MTHCA_PUT(inbox, param->log_num_eqs, INIT_HCA_LOG_EQ_OFFSET); + MTHCA_PUT(inbox, param->rdb_base, INIT_HCA_RDB_BASE_OFFSET); + + /* UD AV attributes */ + + /* multicast attributes */ + + MTHCA_PUT(inbox, param->mc_base, INIT_HCA_MC_BASE_OFFSET); + MTHCA_PUT(inbox, param->log_mc_entry_sz, INIT_HCA_LOG_MC_ENTRY_SZ_OFFSET); + MTHCA_PUT(inbox, param->mc_hash_sz, INIT_HCA_MC_HASH_SZ_OFFSET); + MTHCA_PUT(inbox, param->log_mc_table_sz, INIT_HCA_LOG_MC_TABLE_SZ_OFFSET); + + /* TPT attributes */ + + MTHCA_PUT(inbox, param->mpt_base, INIT_HCA_MPT_BASE_OFFSET); + if (!mthca_is_memfree(dev)) + MTHCA_PUT(inbox, param->mtt_seg_sz, INIT_HCA_MTT_SEG_SZ_OFFSET); + MTHCA_PUT(inbox, param->log_mpt_sz, INIT_HCA_LOG_MPT_SZ_OFFSET); + MTHCA_PUT(inbox, param->mtt_base, INIT_HCA_MTT_BASE_OFFSET); + + /* UAR attributes */ + { + u8 uar_page_sz = PAGE_SHIFT - 12; + MTHCA_PUT(inbox, uar_page_sz, INIT_HCA_UAR_PAGE_SZ_OFFSET); + } + + MTHCA_PUT(inbox, param->uar_scratch_base, INIT_HCA_UAR_SCATCH_BASE_OFFSET); + + if (mthca_is_memfree(dev)) { + MTHCA_PUT(inbox, param->log_uarc_sz, INIT_HCA_UARC_SZ_OFFSET); + MTHCA_PUT(inbox, param->log_uar_sz, INIT_HCA_LOG_UAR_SZ_OFFSET); + MTHCA_PUT(inbox, param->uarc_base, INIT_HCA_UAR_CTX_BASE_OFFSET); + } + + err = mthca_cmd(dev, mailbox->dma, 0, 0, + CMD_INIT_HCA, CMD_TIME_CLASS_D); + + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_INIT_IB(struct mthca_dev *dev, + struct mthca_init_ib_param *param, + int port) +{ + struct mthca_mailbox *mailbox; + u32 *inbox; + int err; + u32 flags; + +#define INIT_IB_IN_SIZE 56 +#define INIT_IB_FLAGS_OFFSET 0x00 +#define INIT_IB_FLAG_SIG (1 << 18) +#define INIT_IB_FLAG_NG (1 << 17) +#define INIT_IB_FLAG_G0 (1 << 16) +#define INIT_IB_VL_SHIFT 4 +#define INIT_IB_PORT_WIDTH_SHIFT 8 +#define INIT_IB_MTU_SHIFT 12 +#define INIT_IB_MAX_GID_OFFSET 0x06 +#define INIT_IB_MAX_PKEY_OFFSET 0x0a +#define INIT_IB_GUID0_OFFSET 0x10 +#define INIT_IB_NODE_GUID_OFFSET 0x18 +#define INIT_IB_SI_GUID_OFFSET 0x20 + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + inbox = mailbox->buf; + + memset(inbox, 0, INIT_IB_IN_SIZE); + + flags = 0; + flags |= param->set_guid0 ? INIT_IB_FLAG_G0 : 0; + flags |= param->set_node_guid ? INIT_IB_FLAG_NG : 0; + flags |= param->set_si_guid ? INIT_IB_FLAG_SIG : 0; + flags |= param->vl_cap << INIT_IB_VL_SHIFT; + flags |= param->port_width << INIT_IB_PORT_WIDTH_SHIFT; + flags |= param->mtu_cap << INIT_IB_MTU_SHIFT; + MTHCA_PUT(inbox, flags, INIT_IB_FLAGS_OFFSET); + + MTHCA_PUT(inbox, param->gid_cap, INIT_IB_MAX_GID_OFFSET); + MTHCA_PUT(inbox, param->pkey_cap, INIT_IB_MAX_PKEY_OFFSET); + MTHCA_PUT(inbox, param->guid0, INIT_IB_GUID0_OFFSET); + MTHCA_PUT(inbox, param->node_guid, INIT_IB_NODE_GUID_OFFSET); + MTHCA_PUT(inbox, param->si_guid, INIT_IB_SI_GUID_OFFSET); + + err = mthca_cmd(dev, mailbox->dma, port, 0, CMD_INIT_IB, + CMD_TIME_CLASS_A); + + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_CLOSE_IB(struct mthca_dev *dev, int port) +{ + return mthca_cmd(dev, 0, port, 0, CMD_CLOSE_IB, CMD_TIME_CLASS_A); +} + +int mthca_CLOSE_HCA(struct mthca_dev *dev, int panic) +{ + return mthca_cmd(dev, 0, 0, panic, CMD_CLOSE_HCA, CMD_TIME_CLASS_C); +} + +int mthca_SET_IB(struct mthca_dev *dev, struct mthca_set_ib_param *param, + int port) +{ + struct mthca_mailbox *mailbox; + u32 *inbox; + int err; + u32 flags = 0; + +#define SET_IB_IN_SIZE 0x40 +#define SET_IB_FLAGS_OFFSET 0x00 +#define SET_IB_FLAG_SIG (1 << 18) +#define SET_IB_FLAG_RQK (1 << 0) +#define SET_IB_CAP_MASK_OFFSET 0x04 +#define SET_IB_SI_GUID_OFFSET 0x08 + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + inbox = mailbox->buf; + + memset(inbox, 0, SET_IB_IN_SIZE); + + flags |= param->set_si_guid ? SET_IB_FLAG_SIG : 0; + flags |= param->reset_qkey_viol ? SET_IB_FLAG_RQK : 0; + MTHCA_PUT(inbox, flags, SET_IB_FLAGS_OFFSET); + + MTHCA_PUT(inbox, param->cap_mask, SET_IB_CAP_MASK_OFFSET); + MTHCA_PUT(inbox, param->si_guid, SET_IB_SI_GUID_OFFSET); + + err = mthca_cmd(dev, mailbox->dma, port, 0, CMD_SET_IB, + CMD_TIME_CLASS_B); + + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_MAP_ICM(struct mthca_dev *dev, struct mthca_icm *icm, u64 virt) +{ + return mthca_map_cmd(dev, CMD_MAP_ICM, icm, virt); +} + +int mthca_MAP_ICM_page(struct mthca_dev *dev, u64 dma_addr, u64 virt) +{ + struct mthca_mailbox *mailbox; + __be64 *inbox; + int err; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + inbox = mailbox->buf; + + inbox[0] = cpu_to_be64(virt); + inbox[1] = cpu_to_be64(dma_addr); + + err = mthca_cmd(dev, mailbox->dma, 1, 0, CMD_MAP_ICM, + CMD_TIME_CLASS_B); + + mthca_free_mailbox(dev, mailbox); + + if (!err) + mthca_dbg(dev, "Mapped page at %llx to %llx for ICM.\n", + (unsigned long long) dma_addr, (unsigned long long) virt); + + return err; +} + +int mthca_UNMAP_ICM(struct mthca_dev *dev, u64 virt, u32 page_count) +{ + mthca_dbg(dev, "Unmapping %d pages at %llx from ICM.\n", + page_count, (unsigned long long) virt); + + return mthca_cmd(dev, virt, page_count, 0, + CMD_UNMAP_ICM, CMD_TIME_CLASS_B); +} + +int mthca_MAP_ICM_AUX(struct mthca_dev *dev, struct mthca_icm *icm) +{ + return mthca_map_cmd(dev, CMD_MAP_ICM_AUX, icm, -1); +} + +int mthca_UNMAP_ICM_AUX(struct mthca_dev *dev) +{ + return mthca_cmd(dev, 0, 0, 0, CMD_UNMAP_ICM_AUX, CMD_TIME_CLASS_B); +} + +int mthca_SET_ICM_SIZE(struct mthca_dev *dev, u64 icm_size, u64 *aux_pages) +{ + int ret = mthca_cmd_imm(dev, icm_size, aux_pages, 0, + 0, CMD_SET_ICM_SIZE, CMD_TIME_CLASS_A); + + if (ret) + return ret; + + /* + * Round up number of system pages needed in case + * MTHCA_ICM_PAGE_SIZE < PAGE_SIZE. + */ + *aux_pages = ALIGN(*aux_pages, PAGE_SIZE / MTHCA_ICM_PAGE_SIZE) >> + (PAGE_SHIFT - MTHCA_ICM_PAGE_SHIFT); + + return 0; +} + +int mthca_SW2HW_MPT(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int mpt_index) +{ + return mthca_cmd(dev, mailbox->dma, mpt_index, 0, CMD_SW2HW_MPT, + CMD_TIME_CLASS_B); +} + +int mthca_HW2SW_MPT(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int mpt_index) +{ + return mthca_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, mpt_index, + !mailbox, CMD_HW2SW_MPT, + CMD_TIME_CLASS_B); +} + +int mthca_WRITE_MTT(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int num_mtt) +{ + return mthca_cmd(dev, mailbox->dma, num_mtt, 0, CMD_WRITE_MTT, + CMD_TIME_CLASS_B); +} + +int mthca_SYNC_TPT(struct mthca_dev *dev) +{ + return mthca_cmd(dev, 0, 0, 0, CMD_SYNC_TPT, CMD_TIME_CLASS_B); +} + +int mthca_MAP_EQ(struct mthca_dev *dev, u64 event_mask, int unmap, + int eq_num) +{ + mthca_dbg(dev, "%s mask %016llx for eqn %d\n", + unmap ? "Clearing" : "Setting", + (unsigned long long) event_mask, eq_num); + return mthca_cmd(dev, event_mask, (unmap << 31) | eq_num, + 0, CMD_MAP_EQ, CMD_TIME_CLASS_B); +} + +int mthca_SW2HW_EQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int eq_num) +{ + return mthca_cmd(dev, mailbox->dma, eq_num, 0, CMD_SW2HW_EQ, + CMD_TIME_CLASS_A); +} + +int mthca_HW2SW_EQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int eq_num) +{ + return mthca_cmd_box(dev, 0, mailbox->dma, eq_num, 0, + CMD_HW2SW_EQ, + CMD_TIME_CLASS_A); +} + +int mthca_SW2HW_CQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int cq_num) +{ + return mthca_cmd(dev, mailbox->dma, cq_num, 0, CMD_SW2HW_CQ, + CMD_TIME_CLASS_A); +} + +int mthca_HW2SW_CQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int cq_num) +{ + return mthca_cmd_box(dev, 0, mailbox->dma, cq_num, 0, + CMD_HW2SW_CQ, + CMD_TIME_CLASS_A); +} + +int mthca_RESIZE_CQ(struct mthca_dev *dev, int cq_num, u32 lkey, u8 log_size) +{ + struct mthca_mailbox *mailbox; + __be32 *inbox; + int err; + +#define RESIZE_CQ_IN_SIZE 0x40 +#define RESIZE_CQ_LOG_SIZE_OFFSET 0x0c +#define RESIZE_CQ_LKEY_OFFSET 0x1c + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + inbox = mailbox->buf; + + memset(inbox, 0, RESIZE_CQ_IN_SIZE); + /* + * Leave start address fields zeroed out -- mthca assumes that + * MRs for CQs always start at virtual address 0. + */ + MTHCA_PUT(inbox, log_size, RESIZE_CQ_LOG_SIZE_OFFSET); + MTHCA_PUT(inbox, lkey, RESIZE_CQ_LKEY_OFFSET); + + err = mthca_cmd(dev, mailbox->dma, cq_num, 1, CMD_RESIZE_CQ, + CMD_TIME_CLASS_B); + + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_SW2HW_SRQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int srq_num) +{ + return mthca_cmd(dev, mailbox->dma, srq_num, 0, CMD_SW2HW_SRQ, + CMD_TIME_CLASS_A); +} + +int mthca_HW2SW_SRQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int srq_num) +{ + return mthca_cmd_box(dev, 0, mailbox->dma, srq_num, 0, + CMD_HW2SW_SRQ, + CMD_TIME_CLASS_A); +} + +int mthca_QUERY_SRQ(struct mthca_dev *dev, u32 num, + struct mthca_mailbox *mailbox) +{ + return mthca_cmd_box(dev, 0, mailbox->dma, num, 0, + CMD_QUERY_SRQ, CMD_TIME_CLASS_A); +} + +int mthca_ARM_SRQ(struct mthca_dev *dev, int srq_num, int limit) +{ + return mthca_cmd(dev, limit, srq_num, 0, CMD_ARM_SRQ, + CMD_TIME_CLASS_B); +} + +int mthca_MODIFY_QP(struct mthca_dev *dev, enum ib_qp_state cur, + enum ib_qp_state next, u32 num, int is_ee, + struct mthca_mailbox *mailbox, u32 optmask) +{ + static const u16 op[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { + [IB_QPS_RESET] = { + [IB_QPS_RESET] = CMD_ERR2RST_QPEE, + [IB_QPS_ERR] = CMD_2ERR_QPEE, + [IB_QPS_INIT] = CMD_RST2INIT_QPEE, + }, + [IB_QPS_INIT] = { + [IB_QPS_RESET] = CMD_ERR2RST_QPEE, + [IB_QPS_ERR] = CMD_2ERR_QPEE, + [IB_QPS_INIT] = CMD_INIT2INIT_QPEE, + [IB_QPS_RTR] = CMD_INIT2RTR_QPEE, + }, + [IB_QPS_RTR] = { + [IB_QPS_RESET] = CMD_ERR2RST_QPEE, + [IB_QPS_ERR] = CMD_2ERR_QPEE, + [IB_QPS_RTS] = CMD_RTR2RTS_QPEE, + }, + [IB_QPS_RTS] = { + [IB_QPS_RESET] = CMD_ERR2RST_QPEE, + [IB_QPS_ERR] = CMD_2ERR_QPEE, + [IB_QPS_RTS] = CMD_RTS2RTS_QPEE, + [IB_QPS_SQD] = CMD_RTS2SQD_QPEE, + }, + [IB_QPS_SQD] = { + [IB_QPS_RESET] = CMD_ERR2RST_QPEE, + [IB_QPS_ERR] = CMD_2ERR_QPEE, + [IB_QPS_RTS] = CMD_SQD2RTS_QPEE, + [IB_QPS_SQD] = CMD_SQD2SQD_QPEE, + }, + [IB_QPS_SQE] = { + [IB_QPS_RESET] = CMD_ERR2RST_QPEE, + [IB_QPS_ERR] = CMD_2ERR_QPEE, + [IB_QPS_RTS] = CMD_SQERR2RTS_QPEE, + }, + [IB_QPS_ERR] = { + [IB_QPS_RESET] = CMD_ERR2RST_QPEE, + [IB_QPS_ERR] = CMD_2ERR_QPEE, + } + }; + + u8 op_mod = 0; + int my_mailbox = 0; + int err; + + if (op[cur][next] == CMD_ERR2RST_QPEE) { + op_mod = 3; /* don't write outbox, any->reset */ + + /* For debugging */ + if (!mailbox) { + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (!IS_ERR(mailbox)) { + my_mailbox = 1; + op_mod = 2; /* write outbox, any->reset */ + } else + mailbox = NULL; + } + + err = mthca_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, + (!!is_ee << 24) | num, op_mod, + op[cur][next], CMD_TIME_CLASS_C); + + if (0 && mailbox) { + int i; + mthca_dbg(dev, "Dumping QP context:\n"); + printk(" %08x\n", be32_to_cpup(mailbox->buf)); + for (i = 0; i < 0x100 / 4; ++i) { + if (i % 8 == 0) + printk("[%02x] ", i * 4); + printk(" %08x", + be32_to_cpu(((__be32 *) mailbox->buf)[i + 2])); + if ((i + 1) % 8 == 0) + printk("\n"); + } + } + + if (my_mailbox) + mthca_free_mailbox(dev, mailbox); + } else { + if (0) { + int i; + mthca_dbg(dev, "Dumping QP context:\n"); + printk(" opt param mask: %08x\n", be32_to_cpup(mailbox->buf)); + for (i = 0; i < 0x100 / 4; ++i) { + if (i % 8 == 0) + printk(" [%02x] ", i * 4); + printk(" %08x", + be32_to_cpu(((__be32 *) mailbox->buf)[i + 2])); + if ((i + 1) % 8 == 0) + printk("\n"); + } + } + + err = mthca_cmd(dev, mailbox->dma, optmask | (!!is_ee << 24) | num, + op_mod, op[cur][next], CMD_TIME_CLASS_C); + } + + return err; +} + +int mthca_QUERY_QP(struct mthca_dev *dev, u32 num, int is_ee, + struct mthca_mailbox *mailbox) +{ + return mthca_cmd_box(dev, 0, mailbox->dma, (!!is_ee << 24) | num, 0, + CMD_QUERY_QPEE, CMD_TIME_CLASS_A); +} + +int mthca_CONF_SPECIAL_QP(struct mthca_dev *dev, int type, u32 qpn) +{ + u8 op_mod; + + switch (type) { + case IB_QPT_SMI: + op_mod = 0; + break; + case IB_QPT_GSI: + op_mod = 1; + break; + case IB_QPT_RAW_IPV6: + op_mod = 2; + break; + case IB_QPT_RAW_ETHERTYPE: + op_mod = 3; + break; + default: + return -EINVAL; + } + + return mthca_cmd(dev, 0, qpn, op_mod, CMD_CONF_SPECIAL_QP, + CMD_TIME_CLASS_B); +} + +int mthca_MAD_IFC(struct mthca_dev *dev, int ignore_mkey, int ignore_bkey, + int port, const struct ib_wc *in_wc, const struct ib_grh *in_grh, + const void *in_mad, void *response_mad) +{ + struct mthca_mailbox *inmailbox, *outmailbox; + void *inbox; + int err; + u32 in_modifier = port; + u8 op_modifier = 0; + +#define MAD_IFC_BOX_SIZE 0x400 +#define MAD_IFC_MY_QPN_OFFSET 0x100 +#define MAD_IFC_RQPN_OFFSET 0x108 +#define MAD_IFC_SL_OFFSET 0x10c +#define MAD_IFC_G_PATH_OFFSET 0x10d +#define MAD_IFC_RLID_OFFSET 0x10e +#define MAD_IFC_PKEY_OFFSET 0x112 +#define MAD_IFC_GRH_OFFSET 0x140 + + inmailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(inmailbox)) + return PTR_ERR(inmailbox); + inbox = inmailbox->buf; + + outmailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(outmailbox)) { + mthca_free_mailbox(dev, inmailbox); + return PTR_ERR(outmailbox); + } + + memcpy(inbox, in_mad, 256); + + /* + * Key check traps can't be generated unless we have in_wc to + * tell us where to send the trap. + */ + if (ignore_mkey || !in_wc) + op_modifier |= 0x1; + if (ignore_bkey || !in_wc) + op_modifier |= 0x2; + + if (in_wc) { + u8 val; + + memset(inbox + 256, 0, 256); + + MTHCA_PUT(inbox, in_wc->qp->qp_num, MAD_IFC_MY_QPN_OFFSET); + MTHCA_PUT(inbox, in_wc->src_qp, MAD_IFC_RQPN_OFFSET); + + val = in_wc->sl << 4; + MTHCA_PUT(inbox, val, MAD_IFC_SL_OFFSET); + + val = in_wc->dlid_path_bits | + (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0); + MTHCA_PUT(inbox, val, MAD_IFC_G_PATH_OFFSET); + + MTHCA_PUT(inbox, ib_lid_cpu16(in_wc->slid), MAD_IFC_RLID_OFFSET); + MTHCA_PUT(inbox, in_wc->pkey_index, MAD_IFC_PKEY_OFFSET); + + if (in_grh) + memcpy(inbox + MAD_IFC_GRH_OFFSET, in_grh, 40); + + op_modifier |= 0x4; + + in_modifier |= ib_lid_cpu16(in_wc->slid) << 16; + } + + err = mthca_cmd_box(dev, inmailbox->dma, outmailbox->dma, + in_modifier, op_modifier, + CMD_MAD_IFC, CMD_TIME_CLASS_C); + + if (!err) + memcpy(response_mad, outmailbox->buf, 256); + + mthca_free_mailbox(dev, inmailbox); + mthca_free_mailbox(dev, outmailbox); + return err; +} + +int mthca_READ_MGM(struct mthca_dev *dev, int index, + struct mthca_mailbox *mailbox) +{ + return mthca_cmd_box(dev, 0, mailbox->dma, index, 0, + CMD_READ_MGM, CMD_TIME_CLASS_A); +} + +int mthca_WRITE_MGM(struct mthca_dev *dev, int index, + struct mthca_mailbox *mailbox) +{ + return mthca_cmd(dev, mailbox->dma, index, 0, CMD_WRITE_MGM, + CMD_TIME_CLASS_A); +} + +int mthca_MGID_HASH(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + u16 *hash) +{ + u64 imm = 0; + int err; + + err = mthca_cmd_imm(dev, mailbox->dma, &imm, 0, 0, CMD_MGID_HASH, + CMD_TIME_CLASS_A); + + *hash = imm; + return err; +} + +int mthca_NOP(struct mthca_dev *dev) +{ + return mthca_cmd(dev, 0, 0x1f, 0, CMD_NOP, msecs_to_jiffies(100)); +} diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.h b/drivers/infiniband/hw/mthca/mthca_cmd.h new file mode 100644 index 000000000..d2e5b194b --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_cmd.h @@ -0,0 +1,325 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * Copyright (c) 2006 Cisco Systems. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef MTHCA_CMD_H +#define MTHCA_CMD_H + +#include <rdma/ib_verbs.h> + +#define MTHCA_MAILBOX_SIZE 4096 + +enum { + /* command completed successfully: */ + MTHCA_CMD_STAT_OK = 0x00, + /* Internal error (such as a bus error) occurred while processing command: */ + MTHCA_CMD_STAT_INTERNAL_ERR = 0x01, + /* Operation/command not supported or opcode modifier not supported: */ + MTHCA_CMD_STAT_BAD_OP = 0x02, + /* Parameter not supported or parameter out of range: */ + MTHCA_CMD_STAT_BAD_PARAM = 0x03, + /* System not enabled or bad system state: */ + MTHCA_CMD_STAT_BAD_SYS_STATE = 0x04, + /* Attempt to access reserved or unallocaterd resource: */ + MTHCA_CMD_STAT_BAD_RESOURCE = 0x05, + /* Requested resource is currently executing a command, or is otherwise busy: */ + MTHCA_CMD_STAT_RESOURCE_BUSY = 0x06, + /* memory error: */ + MTHCA_CMD_STAT_DDR_MEM_ERR = 0x07, + /* Required capability exceeds device limits: */ + MTHCA_CMD_STAT_EXCEED_LIM = 0x08, + /* Resource is not in the appropriate state or ownership: */ + MTHCA_CMD_STAT_BAD_RES_STATE = 0x09, + /* Index out of range: */ + MTHCA_CMD_STAT_BAD_INDEX = 0x0a, + /* FW image corrupted: */ + MTHCA_CMD_STAT_BAD_NVMEM = 0x0b, + /* Attempt to modify a QP/EE which is not in the presumed state: */ + MTHCA_CMD_STAT_BAD_QPEE_STATE = 0x10, + /* Bad segment parameters (Address/Size): */ + MTHCA_CMD_STAT_BAD_SEG_PARAM = 0x20, + /* Memory Region has Memory Windows bound to: */ + MTHCA_CMD_STAT_REG_BOUND = 0x21, + /* HCA local attached memory not present: */ + MTHCA_CMD_STAT_LAM_NOT_PRE = 0x22, + /* Bad management packet (silently discarded): */ + MTHCA_CMD_STAT_BAD_PKT = 0x30, + /* More outstanding CQEs in CQ than new CQ size: */ + MTHCA_CMD_STAT_BAD_SIZE = 0x40 +}; + +enum { + MTHCA_TRANS_INVALID = 0, + MTHCA_TRANS_RST2INIT, + MTHCA_TRANS_INIT2INIT, + MTHCA_TRANS_INIT2RTR, + MTHCA_TRANS_RTR2RTS, + MTHCA_TRANS_RTS2RTS, + MTHCA_TRANS_SQERR2RTS, + MTHCA_TRANS_ANY2ERR, + MTHCA_TRANS_RTS2SQD, + MTHCA_TRANS_SQD2SQD, + MTHCA_TRANS_SQD2RTS, + MTHCA_TRANS_ANY2RST, +}; + +enum { + DEV_LIM_FLAG_RC = 1 << 0, + DEV_LIM_FLAG_UC = 1 << 1, + DEV_LIM_FLAG_UD = 1 << 2, + DEV_LIM_FLAG_RD = 1 << 3, + DEV_LIM_FLAG_RAW_IPV6 = 1 << 4, + DEV_LIM_FLAG_RAW_ETHER = 1 << 5, + DEV_LIM_FLAG_SRQ = 1 << 6, + DEV_LIM_FLAG_IPOIB_CSUM = 1 << 7, + DEV_LIM_FLAG_BAD_PKEY_CNTR = 1 << 8, + DEV_LIM_FLAG_BAD_QKEY_CNTR = 1 << 9, + DEV_LIM_FLAG_MW = 1 << 16, + DEV_LIM_FLAG_AUTO_PATH_MIG = 1 << 17, + DEV_LIM_FLAG_ATOMIC = 1 << 18, + DEV_LIM_FLAG_RAW_MULTI = 1 << 19, + DEV_LIM_FLAG_UD_AV_PORT_ENFORCE = 1 << 20, + DEV_LIM_FLAG_UD_MULTI = 1 << 21, +}; + +struct mthca_mailbox { + dma_addr_t dma; + void *buf; +}; + +struct mthca_dev_lim { + int max_srq_sz; + int max_qp_sz; + int reserved_qps; + int max_qps; + int reserved_srqs; + int max_srqs; + int reserved_eecs; + int max_eecs; + int max_cq_sz; + int reserved_cqs; + int max_cqs; + int max_mpts; + int reserved_eqs; + int max_eqs; + int reserved_mtts; + int max_mrw_sz; + int reserved_mrws; + int max_mtt_seg; + int max_requester_per_qp; + int max_responder_per_qp; + int max_rdma_global; + int local_ca_ack_delay; + int max_mtu; + int max_port_width; + int max_vl; + int num_ports; + int max_gids; + u16 stat_rate_support; + int max_pkeys; + u32 flags; + int reserved_uars; + int uar_size; + int min_page_sz; + int max_sg; + int max_desc_sz; + int max_qp_per_mcg; + int reserved_mgms; + int max_mcgs; + int reserved_pds; + int max_pds; + int reserved_rdds; + int max_rdds; + int eec_entry_sz; + int qpc_entry_sz; + int eeec_entry_sz; + int eqpc_entry_sz; + int eqc_entry_sz; + int cqc_entry_sz; + int srq_entry_sz; + int uar_scratch_entry_sz; + int mpt_entry_sz; + union { + struct { + int max_avs; + } tavor; + struct { + int resize_srq; + int max_pbl_sz; + u8 bmme_flags; + u32 reserved_lkey; + int lam_required; + u64 max_icm_sz; + } arbel; + } hca; +}; + +struct mthca_adapter { + u32 vendor_id; + u32 device_id; + u32 revision_id; + char board_id[MTHCA_BOARD_ID_LEN]; + u8 inta_pin; +}; + +struct mthca_init_hca_param { + u64 qpc_base; + u64 eec_base; + u64 srqc_base; + u64 cqc_base; + u64 eqpc_base; + u64 eeec_base; + u64 eqc_base; + u64 rdb_base; + u64 mc_base; + u64 mpt_base; + u64 mtt_base; + u64 uar_scratch_base; + u64 uarc_base; + u16 log_mc_entry_sz; + u16 mc_hash_sz; + u8 log_num_qps; + u8 log_num_eecs; + u8 log_num_srqs; + u8 log_num_cqs; + u8 log_num_eqs; + u8 log_mc_table_sz; + u8 mtt_seg_sz; + u8 log_mpt_sz; + u8 log_uar_sz; + u8 log_uarc_sz; +}; + +struct mthca_init_ib_param { + int port_width; + int vl_cap; + int mtu_cap; + u16 gid_cap; + u16 pkey_cap; + int set_guid0; + u64 guid0; + int set_node_guid; + u64 node_guid; + int set_si_guid; + u64 si_guid; +}; + +struct mthca_set_ib_param { + int set_si_guid; + int reset_qkey_viol; + u64 si_guid; + u32 cap_mask; +}; + +int mthca_cmd_init(struct mthca_dev *dev); +void mthca_cmd_cleanup(struct mthca_dev *dev); +int mthca_cmd_use_events(struct mthca_dev *dev); +void mthca_cmd_use_polling(struct mthca_dev *dev); +void mthca_cmd_event(struct mthca_dev *dev, u16 token, + u8 status, u64 out_param); + +struct mthca_mailbox *mthca_alloc_mailbox(struct mthca_dev *dev, + gfp_t gfp_mask); +void mthca_free_mailbox(struct mthca_dev *dev, struct mthca_mailbox *mailbox); + +int mthca_SYS_EN(struct mthca_dev *dev); +int mthca_SYS_DIS(struct mthca_dev *dev); +int mthca_MAP_FA(struct mthca_dev *dev, struct mthca_icm *icm); +int mthca_UNMAP_FA(struct mthca_dev *dev); +int mthca_RUN_FW(struct mthca_dev *dev); +int mthca_QUERY_FW(struct mthca_dev *dev); +int mthca_ENABLE_LAM(struct mthca_dev *dev); +int mthca_DISABLE_LAM(struct mthca_dev *dev); +int mthca_QUERY_DDR(struct mthca_dev *dev); +int mthca_QUERY_DEV_LIM(struct mthca_dev *dev, + struct mthca_dev_lim *dev_lim); +int mthca_QUERY_ADAPTER(struct mthca_dev *dev, + struct mthca_adapter *adapter); +int mthca_INIT_HCA(struct mthca_dev *dev, + struct mthca_init_hca_param *param); +int mthca_INIT_IB(struct mthca_dev *dev, + struct mthca_init_ib_param *param, + int port); +int mthca_CLOSE_IB(struct mthca_dev *dev, int port); +int mthca_CLOSE_HCA(struct mthca_dev *dev, int panic); +int mthca_SET_IB(struct mthca_dev *dev, struct mthca_set_ib_param *param, + int port); +int mthca_MAP_ICM(struct mthca_dev *dev, struct mthca_icm *icm, u64 virt); +int mthca_MAP_ICM_page(struct mthca_dev *dev, u64 dma_addr, u64 virt); +int mthca_UNMAP_ICM(struct mthca_dev *dev, u64 virt, u32 page_count); +int mthca_MAP_ICM_AUX(struct mthca_dev *dev, struct mthca_icm *icm); +int mthca_UNMAP_ICM_AUX(struct mthca_dev *dev); +int mthca_SET_ICM_SIZE(struct mthca_dev *dev, u64 icm_size, u64 *aux_pages); +int mthca_SW2HW_MPT(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int mpt_index); +int mthca_HW2SW_MPT(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int mpt_index); +int mthca_WRITE_MTT(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int num_mtt); +int mthca_SYNC_TPT(struct mthca_dev *dev); +int mthca_MAP_EQ(struct mthca_dev *dev, u64 event_mask, int unmap, + int eq_num); +int mthca_SW2HW_EQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int eq_num); +int mthca_HW2SW_EQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int eq_num); +int mthca_SW2HW_CQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int cq_num); +int mthca_HW2SW_CQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int cq_num); +int mthca_RESIZE_CQ(struct mthca_dev *dev, int cq_num, u32 lkey, u8 log_size); +int mthca_SW2HW_SRQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int srq_num); +int mthca_HW2SW_SRQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + int srq_num); +int mthca_QUERY_SRQ(struct mthca_dev *dev, u32 num, + struct mthca_mailbox *mailbox); +int mthca_ARM_SRQ(struct mthca_dev *dev, int srq_num, int limit); +int mthca_MODIFY_QP(struct mthca_dev *dev, enum ib_qp_state cur, + enum ib_qp_state next, u32 num, int is_ee, + struct mthca_mailbox *mailbox, u32 optmask); +int mthca_QUERY_QP(struct mthca_dev *dev, u32 num, int is_ee, + struct mthca_mailbox *mailbox); +int mthca_CONF_SPECIAL_QP(struct mthca_dev *dev, int type, u32 qpn); +int mthca_MAD_IFC(struct mthca_dev *dev, int ignore_mkey, int ignore_bkey, + int port, const struct ib_wc *in_wc, const struct ib_grh *in_grh, + const void *in_mad, void *response_mad); +int mthca_READ_MGM(struct mthca_dev *dev, int index, + struct mthca_mailbox *mailbox); +int mthca_WRITE_MGM(struct mthca_dev *dev, int index, + struct mthca_mailbox *mailbox); +int mthca_MGID_HASH(struct mthca_dev *dev, struct mthca_mailbox *mailbox, + u16 *hash); +int mthca_NOP(struct mthca_dev *dev); + +#endif /* MTHCA_CMD_H */ diff --git a/drivers/infiniband/hw/mthca/mthca_config_reg.h b/drivers/infiniband/hw/mthca/mthca_config_reg.h new file mode 100644 index 000000000..155bc6639 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_config_reg.h @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef MTHCA_CONFIG_REG_H +#define MTHCA_CONFIG_REG_H + +#define MTHCA_HCR_BASE 0x80680 +#define MTHCA_HCR_SIZE 0x0001c +#define MTHCA_ECR_BASE 0x80700 +#define MTHCA_ECR_SIZE 0x00008 +#define MTHCA_ECR_CLR_BASE 0x80708 +#define MTHCA_ECR_CLR_SIZE 0x00008 +#define MTHCA_MAP_ECR_SIZE (MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE) +#define MTHCA_CLR_INT_BASE 0xf00d8 +#define MTHCA_CLR_INT_SIZE 0x00008 +#define MTHCA_EQ_SET_CI_SIZE (8 * 32) + +#endif /* MTHCA_CONFIG_REG_H */ diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c new file mode 100644 index 000000000..26c3408dc --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_cq.c @@ -0,0 +1,978 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. + * Copyright (c) 2005, 2006 Cisco Systems, Inc. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * Copyright (c) 2004 Voltaire, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/gfp.h> +#include <linux/hardirq.h> +#include <linux/sched.h> + +#include <asm/io.h> + +#include <rdma/ib_pack.h> + +#include "mthca_dev.h" +#include "mthca_cmd.h" +#include "mthca_memfree.h" + +enum { + MTHCA_MAX_DIRECT_CQ_SIZE = 4 * PAGE_SIZE +}; + +enum { + MTHCA_CQ_ENTRY_SIZE = 0x20 +}; + +enum { + MTHCA_ATOMIC_BYTE_LEN = 8 +}; + +/* + * Must be packed because start is 64 bits but only aligned to 32 bits. + */ +struct mthca_cq_context { + __be32 flags; + __be64 start; + __be32 logsize_usrpage; + __be32 error_eqn; /* Tavor only */ + __be32 comp_eqn; + __be32 pd; + __be32 lkey; + __be32 last_notified_index; + __be32 solicit_producer_index; + __be32 consumer_index; + __be32 producer_index; + __be32 cqn; + __be32 ci_db; /* Arbel only */ + __be32 state_db; /* Arbel only */ + u32 reserved; +} __packed; + +#define MTHCA_CQ_STATUS_OK ( 0 << 28) +#define MTHCA_CQ_STATUS_OVERFLOW ( 9 << 28) +#define MTHCA_CQ_STATUS_WRITE_FAIL (10 << 28) +#define MTHCA_CQ_FLAG_TR ( 1 << 18) +#define MTHCA_CQ_FLAG_OI ( 1 << 17) +#define MTHCA_CQ_STATE_DISARMED ( 0 << 8) +#define MTHCA_CQ_STATE_ARMED ( 1 << 8) +#define MTHCA_CQ_STATE_ARMED_SOL ( 4 << 8) +#define MTHCA_EQ_STATE_FIRED (10 << 8) + +enum { + MTHCA_ERROR_CQE_OPCODE_MASK = 0xfe +}; + +enum { + SYNDROME_LOCAL_LENGTH_ERR = 0x01, + SYNDROME_LOCAL_QP_OP_ERR = 0x02, + SYNDROME_LOCAL_EEC_OP_ERR = 0x03, + SYNDROME_LOCAL_PROT_ERR = 0x04, + SYNDROME_WR_FLUSH_ERR = 0x05, + SYNDROME_MW_BIND_ERR = 0x06, + SYNDROME_BAD_RESP_ERR = 0x10, + SYNDROME_LOCAL_ACCESS_ERR = 0x11, + SYNDROME_REMOTE_INVAL_REQ_ERR = 0x12, + SYNDROME_REMOTE_ACCESS_ERR = 0x13, + SYNDROME_REMOTE_OP_ERR = 0x14, + SYNDROME_RETRY_EXC_ERR = 0x15, + SYNDROME_RNR_RETRY_EXC_ERR = 0x16, + SYNDROME_LOCAL_RDD_VIOL_ERR = 0x20, + SYNDROME_REMOTE_INVAL_RD_REQ_ERR = 0x21, + SYNDROME_REMOTE_ABORTED_ERR = 0x22, + SYNDROME_INVAL_EECN_ERR = 0x23, + SYNDROME_INVAL_EEC_STATE_ERR = 0x24 +}; + +struct mthca_cqe { + __be32 my_qpn; + __be32 my_ee; + __be32 rqpn; + u8 sl_ipok; + u8 g_mlpath; + __be16 rlid; + __be32 imm_etype_pkey_eec; + __be32 byte_cnt; + __be32 wqe; + u8 opcode; + u8 is_send; + u8 reserved; + u8 owner; +}; + +struct mthca_err_cqe { + __be32 my_qpn; + u32 reserved1[3]; + u8 syndrome; + u8 vendor_err; + __be16 db_cnt; + u32 reserved2; + __be32 wqe; + u8 opcode; + u8 reserved3[2]; + u8 owner; +}; + +#define MTHCA_CQ_ENTRY_OWNER_SW (0 << 7) +#define MTHCA_CQ_ENTRY_OWNER_HW (1 << 7) + +#define MTHCA_TAVOR_CQ_DB_INC_CI (1 << 24) +#define MTHCA_TAVOR_CQ_DB_REQ_NOT (2 << 24) +#define MTHCA_TAVOR_CQ_DB_REQ_NOT_SOL (3 << 24) +#define MTHCA_TAVOR_CQ_DB_SET_CI (4 << 24) +#define MTHCA_TAVOR_CQ_DB_REQ_NOT_MULT (5 << 24) + +#define MTHCA_ARBEL_CQ_DB_REQ_NOT_SOL (1 << 24) +#define MTHCA_ARBEL_CQ_DB_REQ_NOT (2 << 24) +#define MTHCA_ARBEL_CQ_DB_REQ_NOT_MULT (3 << 24) + +static inline struct mthca_cqe *get_cqe_from_buf(struct mthca_cq_buf *buf, + int entry) +{ + if (buf->is_direct) + return buf->queue.direct.buf + (entry * MTHCA_CQ_ENTRY_SIZE); + else + return buf->queue.page_list[entry * MTHCA_CQ_ENTRY_SIZE / PAGE_SIZE].buf + + (entry * MTHCA_CQ_ENTRY_SIZE) % PAGE_SIZE; +} + +static inline struct mthca_cqe *get_cqe(struct mthca_cq *cq, int entry) +{ + return get_cqe_from_buf(&cq->buf, entry); +} + +static inline struct mthca_cqe *cqe_sw(struct mthca_cqe *cqe) +{ + return MTHCA_CQ_ENTRY_OWNER_HW & cqe->owner ? NULL : cqe; +} + +static inline struct mthca_cqe *next_cqe_sw(struct mthca_cq *cq) +{ + return cqe_sw(get_cqe(cq, cq->cons_index & cq->ibcq.cqe)); +} + +static inline void set_cqe_hw(struct mthca_cqe *cqe) +{ + cqe->owner = MTHCA_CQ_ENTRY_OWNER_HW; +} + +static void dump_cqe(struct mthca_dev *dev, void *cqe_ptr) +{ + __be32 *cqe = cqe_ptr; + + (void) cqe; /* avoid warning if mthca_dbg compiled away... */ + mthca_dbg(dev, "CQE contents %08x %08x %08x %08x %08x %08x %08x %08x\n", + be32_to_cpu(cqe[0]), be32_to_cpu(cqe[1]), be32_to_cpu(cqe[2]), + be32_to_cpu(cqe[3]), be32_to_cpu(cqe[4]), be32_to_cpu(cqe[5]), + be32_to_cpu(cqe[6]), be32_to_cpu(cqe[7])); +} + +/* + * incr is ignored in native Arbel (mem-free) mode, so cq->cons_index + * should be correct before calling update_cons_index(). + */ +static inline void update_cons_index(struct mthca_dev *dev, struct mthca_cq *cq, + int incr) +{ + if (mthca_is_memfree(dev)) { + *cq->set_ci_db = cpu_to_be32(cq->cons_index); + wmb(); + } else { + mthca_write64(MTHCA_TAVOR_CQ_DB_INC_CI | cq->cqn, incr - 1, + dev->kar + MTHCA_CQ_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); + } +} + +void mthca_cq_completion(struct mthca_dev *dev, u32 cqn) +{ + struct mthca_cq *cq; + + cq = mthca_array_get(&dev->cq_table.cq, cqn & (dev->limits.num_cqs - 1)); + + if (!cq) { + mthca_warn(dev, "Completion event for bogus CQ %08x\n", cqn); + return; + } + + ++cq->arm_sn; + + cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context); +} + +void mthca_cq_event(struct mthca_dev *dev, u32 cqn, + enum ib_event_type event_type) +{ + struct mthca_cq *cq; + struct ib_event event; + + spin_lock(&dev->cq_table.lock); + + cq = mthca_array_get(&dev->cq_table.cq, cqn & (dev->limits.num_cqs - 1)); + if (cq) + ++cq->refcount; + + spin_unlock(&dev->cq_table.lock); + + if (!cq) { + mthca_warn(dev, "Async event for bogus CQ %08x\n", cqn); + return; + } + + event.device = &dev->ib_dev; + event.event = event_type; + event.element.cq = &cq->ibcq; + if (cq->ibcq.event_handler) + cq->ibcq.event_handler(&event, cq->ibcq.cq_context); + + spin_lock(&dev->cq_table.lock); + if (!--cq->refcount) + wake_up(&cq->wait); + spin_unlock(&dev->cq_table.lock); +} + +static inline int is_recv_cqe(struct mthca_cqe *cqe) +{ + if ((cqe->opcode & MTHCA_ERROR_CQE_OPCODE_MASK) == + MTHCA_ERROR_CQE_OPCODE_MASK) + return !(cqe->opcode & 0x01); + else + return !(cqe->is_send & 0x80); +} + +void mthca_cq_clean(struct mthca_dev *dev, struct mthca_cq *cq, u32 qpn, + struct mthca_srq *srq) +{ + struct mthca_cqe *cqe; + u32 prod_index; + int i, nfreed = 0; + + spin_lock_irq(&cq->lock); + + /* + * First we need to find the current producer index, so we + * know where to start cleaning from. It doesn't matter if HW + * adds new entries after this loop -- the QP we're worried + * about is already in RESET, so the new entries won't come + * from our QP and therefore don't need to be checked. + */ + for (prod_index = cq->cons_index; + cqe_sw(get_cqe(cq, prod_index & cq->ibcq.cqe)); + ++prod_index) + if (prod_index == cq->cons_index + cq->ibcq.cqe) + break; + + if (0) + mthca_dbg(dev, "Cleaning QPN %06x from CQN %06x; ci %d, pi %d\n", + qpn, cq->cqn, cq->cons_index, prod_index); + + /* + * Now sweep backwards through the CQ, removing CQ entries + * that match our QP by copying older entries on top of them. + */ + while ((int) --prod_index - (int) cq->cons_index >= 0) { + cqe = get_cqe(cq, prod_index & cq->ibcq.cqe); + if (cqe->my_qpn == cpu_to_be32(qpn)) { + if (srq && is_recv_cqe(cqe)) + mthca_free_srq_wqe(srq, be32_to_cpu(cqe->wqe)); + ++nfreed; + } else if (nfreed) + memcpy(get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe), + cqe, MTHCA_CQ_ENTRY_SIZE); + } + + if (nfreed) { + for (i = 0; i < nfreed; ++i) + set_cqe_hw(get_cqe(cq, (cq->cons_index + i) & cq->ibcq.cqe)); + wmb(); + cq->cons_index += nfreed; + update_cons_index(dev, cq, nfreed); + } + + spin_unlock_irq(&cq->lock); +} + +void mthca_cq_resize_copy_cqes(struct mthca_cq *cq) +{ + int i; + + /* + * In Tavor mode, the hardware keeps the consumer and producer + * indices mod the CQ size. Since we might be making the CQ + * bigger, we need to deal with the case where the producer + * index wrapped around before the CQ was resized. + */ + if (!mthca_is_memfree(to_mdev(cq->ibcq.device)) && + cq->ibcq.cqe < cq->resize_buf->cqe) { + cq->cons_index &= cq->ibcq.cqe; + if (cqe_sw(get_cqe(cq, cq->ibcq.cqe))) + cq->cons_index -= cq->ibcq.cqe + 1; + } + + for (i = cq->cons_index; cqe_sw(get_cqe(cq, i & cq->ibcq.cqe)); ++i) + memcpy(get_cqe_from_buf(&cq->resize_buf->buf, + i & cq->resize_buf->cqe), + get_cqe(cq, i & cq->ibcq.cqe), MTHCA_CQ_ENTRY_SIZE); +} + +int mthca_alloc_cq_buf(struct mthca_dev *dev, struct mthca_cq_buf *buf, int nent) +{ + int ret; + int i; + + ret = mthca_buf_alloc(dev, nent * MTHCA_CQ_ENTRY_SIZE, + MTHCA_MAX_DIRECT_CQ_SIZE, + &buf->queue, &buf->is_direct, + &dev->driver_pd, 1, &buf->mr); + if (ret) + return ret; + + for (i = 0; i < nent; ++i) + set_cqe_hw(get_cqe_from_buf(buf, i)); + + return 0; +} + +void mthca_free_cq_buf(struct mthca_dev *dev, struct mthca_cq_buf *buf, int cqe) +{ + mthca_buf_free(dev, (cqe + 1) * MTHCA_CQ_ENTRY_SIZE, &buf->queue, + buf->is_direct, &buf->mr); +} + +static void handle_error_cqe(struct mthca_dev *dev, struct mthca_cq *cq, + struct mthca_qp *qp, int wqe_index, int is_send, + struct mthca_err_cqe *cqe, + struct ib_wc *entry, int *free_cqe) +{ + int dbd; + __be32 new_wqe; + + if (cqe->syndrome == SYNDROME_LOCAL_QP_OP_ERR) { + mthca_dbg(dev, "local QP operation err " + "(QPN %06x, WQE @ %08x, CQN %06x, index %d)\n", + be32_to_cpu(cqe->my_qpn), be32_to_cpu(cqe->wqe), + cq->cqn, cq->cons_index); + dump_cqe(dev, cqe); + } + + /* + * For completions in error, only work request ID, status, vendor error + * (and freed resource count for RD) have to be set. + */ + switch (cqe->syndrome) { + case SYNDROME_LOCAL_LENGTH_ERR: + entry->status = IB_WC_LOC_LEN_ERR; + break; + case SYNDROME_LOCAL_QP_OP_ERR: + entry->status = IB_WC_LOC_QP_OP_ERR; + break; + case SYNDROME_LOCAL_EEC_OP_ERR: + entry->status = IB_WC_LOC_EEC_OP_ERR; + break; + case SYNDROME_LOCAL_PROT_ERR: + entry->status = IB_WC_LOC_PROT_ERR; + break; + case SYNDROME_WR_FLUSH_ERR: + entry->status = IB_WC_WR_FLUSH_ERR; + break; + case SYNDROME_MW_BIND_ERR: + entry->status = IB_WC_MW_BIND_ERR; + break; + case SYNDROME_BAD_RESP_ERR: + entry->status = IB_WC_BAD_RESP_ERR; + break; + case SYNDROME_LOCAL_ACCESS_ERR: + entry->status = IB_WC_LOC_ACCESS_ERR; + break; + case SYNDROME_REMOTE_INVAL_REQ_ERR: + entry->status = IB_WC_REM_INV_REQ_ERR; + break; + case SYNDROME_REMOTE_ACCESS_ERR: + entry->status = IB_WC_REM_ACCESS_ERR; + break; + case SYNDROME_REMOTE_OP_ERR: + entry->status = IB_WC_REM_OP_ERR; + break; + case SYNDROME_RETRY_EXC_ERR: + entry->status = IB_WC_RETRY_EXC_ERR; + break; + case SYNDROME_RNR_RETRY_EXC_ERR: + entry->status = IB_WC_RNR_RETRY_EXC_ERR; + break; + case SYNDROME_LOCAL_RDD_VIOL_ERR: + entry->status = IB_WC_LOC_RDD_VIOL_ERR; + break; + case SYNDROME_REMOTE_INVAL_RD_REQ_ERR: + entry->status = IB_WC_REM_INV_RD_REQ_ERR; + break; + case SYNDROME_REMOTE_ABORTED_ERR: + entry->status = IB_WC_REM_ABORT_ERR; + break; + case SYNDROME_INVAL_EECN_ERR: + entry->status = IB_WC_INV_EECN_ERR; + break; + case SYNDROME_INVAL_EEC_STATE_ERR: + entry->status = IB_WC_INV_EEC_STATE_ERR; + break; + default: + entry->status = IB_WC_GENERAL_ERR; + break; + } + + entry->vendor_err = cqe->vendor_err; + + /* + * Mem-free HCAs always generate one CQE per WQE, even in the + * error case, so we don't have to check the doorbell count, etc. + */ + if (mthca_is_memfree(dev)) + return; + + mthca_free_err_wqe(dev, qp, is_send, wqe_index, &dbd, &new_wqe); + + /* + * If we're at the end of the WQE chain, or we've used up our + * doorbell count, free the CQE. Otherwise just update it for + * the next poll operation. + */ + if (!(new_wqe & cpu_to_be32(0x3f)) || (!cqe->db_cnt && dbd)) + return; + + be16_add_cpu(&cqe->db_cnt, -dbd); + cqe->wqe = new_wqe; + cqe->syndrome = SYNDROME_WR_FLUSH_ERR; + + *free_cqe = 0; +} + +static inline int mthca_poll_one(struct mthca_dev *dev, + struct mthca_cq *cq, + struct mthca_qp **cur_qp, + int *freed, + struct ib_wc *entry) +{ + struct mthca_wq *wq; + struct mthca_cqe *cqe; + int wqe_index; + int is_error; + int is_send; + int free_cqe = 1; + int err = 0; + u16 checksum; + + cqe = next_cqe_sw(cq); + if (!cqe) + return -EAGAIN; + + /* + * Make sure we read CQ entry contents after we've checked the + * ownership bit. + */ + rmb(); + + if (0) { + mthca_dbg(dev, "%x/%d: CQE -> QPN %06x, WQE @ %08x\n", + cq->cqn, cq->cons_index, be32_to_cpu(cqe->my_qpn), + be32_to_cpu(cqe->wqe)); + dump_cqe(dev, cqe); + } + + is_error = (cqe->opcode & MTHCA_ERROR_CQE_OPCODE_MASK) == + MTHCA_ERROR_CQE_OPCODE_MASK; + is_send = is_error ? cqe->opcode & 0x01 : cqe->is_send & 0x80; + + if (!*cur_qp || be32_to_cpu(cqe->my_qpn) != (*cur_qp)->qpn) { + /* + * We do not have to take the QP table lock here, + * because CQs will be locked while QPs are removed + * from the table. + */ + *cur_qp = mthca_array_get(&dev->qp_table.qp, + be32_to_cpu(cqe->my_qpn) & + (dev->limits.num_qps - 1)); + if (!*cur_qp) { + mthca_warn(dev, "CQ entry for unknown QP %06x\n", + be32_to_cpu(cqe->my_qpn) & 0xffffff); + err = -EINVAL; + goto out; + } + } + + entry->qp = &(*cur_qp)->ibqp; + + if (is_send) { + wq = &(*cur_qp)->sq; + wqe_index = ((be32_to_cpu(cqe->wqe) - (*cur_qp)->send_wqe_offset) + >> wq->wqe_shift); + entry->wr_id = (*cur_qp)->wrid[wqe_index + + (*cur_qp)->rq.max]; + } else if ((*cur_qp)->ibqp.srq) { + struct mthca_srq *srq = to_msrq((*cur_qp)->ibqp.srq); + u32 wqe = be32_to_cpu(cqe->wqe); + wq = NULL; + wqe_index = wqe >> srq->wqe_shift; + entry->wr_id = srq->wrid[wqe_index]; + mthca_free_srq_wqe(srq, wqe); + } else { + s32 wqe; + wq = &(*cur_qp)->rq; + wqe = be32_to_cpu(cqe->wqe); + wqe_index = wqe >> wq->wqe_shift; + /* + * WQE addr == base - 1 might be reported in receive completion + * with error instead of (rq size - 1) by Sinai FW 1.0.800 and + * Arbel FW 5.1.400. This bug should be fixed in later FW revs. + */ + if (unlikely(wqe_index < 0)) + wqe_index = wq->max - 1; + entry->wr_id = (*cur_qp)->wrid[wqe_index]; + } + + if (wq) { + if (wq->last_comp < wqe_index) + wq->tail += wqe_index - wq->last_comp; + else + wq->tail += wqe_index + wq->max - wq->last_comp; + + wq->last_comp = wqe_index; + } + + if (is_error) { + handle_error_cqe(dev, cq, *cur_qp, wqe_index, is_send, + (struct mthca_err_cqe *) cqe, + entry, &free_cqe); + goto out; + } + + if (is_send) { + entry->wc_flags = 0; + switch (cqe->opcode) { + case MTHCA_OPCODE_RDMA_WRITE: + entry->opcode = IB_WC_RDMA_WRITE; + break; + case MTHCA_OPCODE_RDMA_WRITE_IMM: + entry->opcode = IB_WC_RDMA_WRITE; + entry->wc_flags |= IB_WC_WITH_IMM; + break; + case MTHCA_OPCODE_SEND: + entry->opcode = IB_WC_SEND; + break; + case MTHCA_OPCODE_SEND_IMM: + entry->opcode = IB_WC_SEND; + entry->wc_flags |= IB_WC_WITH_IMM; + break; + case MTHCA_OPCODE_RDMA_READ: + entry->opcode = IB_WC_RDMA_READ; + entry->byte_len = be32_to_cpu(cqe->byte_cnt); + break; + case MTHCA_OPCODE_ATOMIC_CS: + entry->opcode = IB_WC_COMP_SWAP; + entry->byte_len = MTHCA_ATOMIC_BYTE_LEN; + break; + case MTHCA_OPCODE_ATOMIC_FA: + entry->opcode = IB_WC_FETCH_ADD; + entry->byte_len = MTHCA_ATOMIC_BYTE_LEN; + break; + default: + entry->opcode = 0xFF; + break; + } + } else { + entry->byte_len = be32_to_cpu(cqe->byte_cnt); + switch (cqe->opcode & 0x1f) { + case IB_OPCODE_SEND_LAST_WITH_IMMEDIATE: + case IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE: + entry->wc_flags = IB_WC_WITH_IMM; + entry->ex.imm_data = cqe->imm_etype_pkey_eec; + entry->opcode = IB_WC_RECV; + break; + case IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE: + case IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE: + entry->wc_flags = IB_WC_WITH_IMM; + entry->ex.imm_data = cqe->imm_etype_pkey_eec; + entry->opcode = IB_WC_RECV_RDMA_WITH_IMM; + break; + default: + entry->wc_flags = 0; + entry->opcode = IB_WC_RECV; + break; + } + entry->slid = be16_to_cpu(cqe->rlid); + entry->sl = cqe->sl_ipok >> 4; + entry->src_qp = be32_to_cpu(cqe->rqpn) & 0xffffff; + entry->dlid_path_bits = cqe->g_mlpath & 0x7f; + entry->pkey_index = be32_to_cpu(cqe->imm_etype_pkey_eec) >> 16; + entry->wc_flags |= cqe->g_mlpath & 0x80 ? IB_WC_GRH : 0; + checksum = (be32_to_cpu(cqe->rqpn) >> 24) | + ((be32_to_cpu(cqe->my_ee) >> 16) & 0xff00); + entry->wc_flags |= (cqe->sl_ipok & 1 && checksum == 0xffff) ? + IB_WC_IP_CSUM_OK : 0; + } + + entry->status = IB_WC_SUCCESS; + + out: + if (likely(free_cqe)) { + set_cqe_hw(cqe); + ++(*freed); + ++cq->cons_index; + } + + return err; +} + +int mthca_poll_cq(struct ib_cq *ibcq, int num_entries, + struct ib_wc *entry) +{ + struct mthca_dev *dev = to_mdev(ibcq->device); + struct mthca_cq *cq = to_mcq(ibcq); + struct mthca_qp *qp = NULL; + unsigned long flags; + int err = 0; + int freed = 0; + int npolled; + + spin_lock_irqsave(&cq->lock, flags); + + npolled = 0; +repoll: + while (npolled < num_entries) { + err = mthca_poll_one(dev, cq, &qp, + &freed, entry + npolled); + if (err) + break; + ++npolled; + } + + if (freed) { + wmb(); + update_cons_index(dev, cq, freed); + } + + /* + * If a CQ resize is in progress and we discovered that the + * old buffer is empty, then peek in the new buffer, and if + * it's not empty, switch to the new buffer and continue + * polling there. + */ + if (unlikely(err == -EAGAIN && cq->resize_buf && + cq->resize_buf->state == CQ_RESIZE_READY)) { + /* + * In Tavor mode, the hardware keeps the producer + * index modulo the CQ size. Since we might be making + * the CQ bigger, we need to mask our consumer index + * using the size of the old CQ buffer before looking + * in the new CQ buffer. + */ + if (!mthca_is_memfree(dev)) + cq->cons_index &= cq->ibcq.cqe; + + if (cqe_sw(get_cqe_from_buf(&cq->resize_buf->buf, + cq->cons_index & cq->resize_buf->cqe))) { + struct mthca_cq_buf tbuf; + int tcqe; + + tbuf = cq->buf; + tcqe = cq->ibcq.cqe; + cq->buf = cq->resize_buf->buf; + cq->ibcq.cqe = cq->resize_buf->cqe; + + cq->resize_buf->buf = tbuf; + cq->resize_buf->cqe = tcqe; + cq->resize_buf->state = CQ_RESIZE_SWAPPED; + + goto repoll; + } + } + + spin_unlock_irqrestore(&cq->lock, flags); + + return err == 0 || err == -EAGAIN ? npolled : err; +} + +int mthca_tavor_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags) +{ + u32 dbhi = ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ? + MTHCA_TAVOR_CQ_DB_REQ_NOT_SOL : + MTHCA_TAVOR_CQ_DB_REQ_NOT) | + to_mcq(cq)->cqn; + + mthca_write64(dbhi, 0xffffffff, to_mdev(cq->device)->kar + MTHCA_CQ_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&to_mdev(cq->device)->doorbell_lock)); + + return 0; +} + +int mthca_arbel_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) +{ + struct mthca_cq *cq = to_mcq(ibcq); + __be32 db_rec[2]; + u32 dbhi; + u32 sn = cq->arm_sn & 3; + + db_rec[0] = cpu_to_be32(cq->cons_index); + db_rec[1] = cpu_to_be32((cq->cqn << 8) | (2 << 5) | (sn << 3) | + ((flags & IB_CQ_SOLICITED_MASK) == + IB_CQ_SOLICITED ? 1 : 2)); + + mthca_write_db_rec(db_rec, cq->arm_db); + + /* + * Make sure that the doorbell record in host memory is + * written before ringing the doorbell via PCI MMIO. + */ + wmb(); + + dbhi = (sn << 28) | + ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ? + MTHCA_ARBEL_CQ_DB_REQ_NOT_SOL : + MTHCA_ARBEL_CQ_DB_REQ_NOT) | cq->cqn; + + mthca_write64(dbhi, cq->cons_index, + to_mdev(ibcq->device)->kar + MTHCA_CQ_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->doorbell_lock)); + + return 0; +} + +int mthca_init_cq(struct mthca_dev *dev, int nent, + struct mthca_ucontext *ctx, u32 pdn, + struct mthca_cq *cq) +{ + struct mthca_mailbox *mailbox; + struct mthca_cq_context *cq_context; + int err = -ENOMEM; + + cq->ibcq.cqe = nent - 1; + cq->is_kernel = !ctx; + + cq->cqn = mthca_alloc(&dev->cq_table.alloc); + if (cq->cqn == -1) + return -ENOMEM; + + if (mthca_is_memfree(dev)) { + err = mthca_table_get(dev, dev->cq_table.table, cq->cqn); + if (err) + goto err_out; + + if (cq->is_kernel) { + cq->arm_sn = 1; + + err = -ENOMEM; + + cq->set_ci_db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_CQ_SET_CI, + cq->cqn, &cq->set_ci_db); + if (cq->set_ci_db_index < 0) + goto err_out_icm; + + cq->arm_db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_CQ_ARM, + cq->cqn, &cq->arm_db); + if (cq->arm_db_index < 0) + goto err_out_ci; + } + } + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) { + err = PTR_ERR(mailbox); + goto err_out_arm; + } + + cq_context = mailbox->buf; + + if (cq->is_kernel) { + err = mthca_alloc_cq_buf(dev, &cq->buf, nent); + if (err) + goto err_out_mailbox; + } + + spin_lock_init(&cq->lock); + cq->refcount = 1; + init_waitqueue_head(&cq->wait); + mutex_init(&cq->mutex); + + memset(cq_context, 0, sizeof *cq_context); + cq_context->flags = cpu_to_be32(MTHCA_CQ_STATUS_OK | + MTHCA_CQ_STATE_DISARMED | + MTHCA_CQ_FLAG_TR); + cq_context->logsize_usrpage = cpu_to_be32((ffs(nent) - 1) << 24); + if (ctx) + cq_context->logsize_usrpage |= cpu_to_be32(ctx->uar.index); + else + cq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index); + cq_context->error_eqn = cpu_to_be32(dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn); + cq_context->comp_eqn = cpu_to_be32(dev->eq_table.eq[MTHCA_EQ_COMP].eqn); + cq_context->pd = cpu_to_be32(pdn); + cq_context->lkey = cpu_to_be32(cq->buf.mr.ibmr.lkey); + cq_context->cqn = cpu_to_be32(cq->cqn); + + if (mthca_is_memfree(dev)) { + cq_context->ci_db = cpu_to_be32(cq->set_ci_db_index); + cq_context->state_db = cpu_to_be32(cq->arm_db_index); + } + + err = mthca_SW2HW_CQ(dev, mailbox, cq->cqn); + if (err) { + mthca_warn(dev, "SW2HW_CQ failed (%d)\n", err); + goto err_out_free_mr; + } + + spin_lock_irq(&dev->cq_table.lock); + err = mthca_array_set(&dev->cq_table.cq, + cq->cqn & (dev->limits.num_cqs - 1), cq); + if (err) { + spin_unlock_irq(&dev->cq_table.lock); + goto err_out_free_mr; + } + spin_unlock_irq(&dev->cq_table.lock); + + cq->cons_index = 0; + + mthca_free_mailbox(dev, mailbox); + + return 0; + +err_out_free_mr: + if (cq->is_kernel) + mthca_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe); + +err_out_mailbox: + mthca_free_mailbox(dev, mailbox); + +err_out_arm: + if (cq->is_kernel && mthca_is_memfree(dev)) + mthca_free_db(dev, MTHCA_DB_TYPE_CQ_ARM, cq->arm_db_index); + +err_out_ci: + if (cq->is_kernel && mthca_is_memfree(dev)) + mthca_free_db(dev, MTHCA_DB_TYPE_CQ_SET_CI, cq->set_ci_db_index); + +err_out_icm: + mthca_table_put(dev, dev->cq_table.table, cq->cqn); + +err_out: + mthca_free(&dev->cq_table.alloc, cq->cqn); + + return err; +} + +static inline int get_cq_refcount(struct mthca_dev *dev, struct mthca_cq *cq) +{ + int c; + + spin_lock_irq(&dev->cq_table.lock); + c = cq->refcount; + spin_unlock_irq(&dev->cq_table.lock); + + return c; +} + +void mthca_free_cq(struct mthca_dev *dev, + struct mthca_cq *cq) +{ + struct mthca_mailbox *mailbox; + int err; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) { + mthca_warn(dev, "No memory for mailbox to free CQ.\n"); + return; + } + + err = mthca_HW2SW_CQ(dev, mailbox, cq->cqn); + if (err) + mthca_warn(dev, "HW2SW_CQ failed (%d)\n", err); + + if (0) { + __be32 *ctx = mailbox->buf; + int j; + + printk(KERN_ERR "context for CQN %x (cons index %x, next sw %d)\n", + cq->cqn, cq->cons_index, + cq->is_kernel ? !!next_cqe_sw(cq) : 0); + for (j = 0; j < 16; ++j) + printk(KERN_ERR "[%2x] %08x\n", j * 4, be32_to_cpu(ctx[j])); + } + + spin_lock_irq(&dev->cq_table.lock); + mthca_array_clear(&dev->cq_table.cq, + cq->cqn & (dev->limits.num_cqs - 1)); + --cq->refcount; + spin_unlock_irq(&dev->cq_table.lock); + + if (dev->mthca_flags & MTHCA_FLAG_MSI_X) + synchronize_irq(dev->eq_table.eq[MTHCA_EQ_COMP].msi_x_vector); + else + synchronize_irq(dev->pdev->irq); + + wait_event(cq->wait, !get_cq_refcount(dev, cq)); + + if (cq->is_kernel) { + mthca_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe); + if (mthca_is_memfree(dev)) { + mthca_free_db(dev, MTHCA_DB_TYPE_CQ_ARM, cq->arm_db_index); + mthca_free_db(dev, MTHCA_DB_TYPE_CQ_SET_CI, cq->set_ci_db_index); + } + } + + mthca_table_put(dev, dev->cq_table.table, cq->cqn); + mthca_free(&dev->cq_table.alloc, cq->cqn); + mthca_free_mailbox(dev, mailbox); +} + +int mthca_init_cq_table(struct mthca_dev *dev) +{ + int err; + + spin_lock_init(&dev->cq_table.lock); + + err = mthca_alloc_init(&dev->cq_table.alloc, + dev->limits.num_cqs, + (1 << 24) - 1, + dev->limits.reserved_cqs); + if (err) + return err; + + err = mthca_array_init(&dev->cq_table.cq, + dev->limits.num_cqs); + if (err) + mthca_alloc_cleanup(&dev->cq_table.alloc); + + return err; +} + +void mthca_cleanup_cq_table(struct mthca_dev *dev) +{ + mthca_array_cleanup(&dev->cq_table.cq, dev->limits.num_cqs); + mthca_alloc_cleanup(&dev->cq_table.alloc); +} diff --git a/drivers/infiniband/hw/mthca/mthca_dev.h b/drivers/infiniband/hw/mthca/mthca_dev.h new file mode 100644 index 000000000..a445160de --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_dev.h @@ -0,0 +1,585 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. + * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * Copyright (c) 2004 Voltaire, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef MTHCA_DEV_H +#define MTHCA_DEV_H + +#include <linux/spinlock.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/dma-mapping.h> +#include <linux/timer.h> +#include <linux/mutex.h> +#include <linux/list.h> +#include <linux/semaphore.h> + +#include "mthca_provider.h" +#include "mthca_doorbell.h" + +#define DRV_NAME "ib_mthca" +#define PFX DRV_NAME ": " +#define DRV_VERSION "1.0" +#define DRV_RELDATE "April 4, 2008" + +enum { + MTHCA_FLAG_DDR_HIDDEN = 1 << 1, + MTHCA_FLAG_SRQ = 1 << 2, + MTHCA_FLAG_MSI_X = 1 << 3, + MTHCA_FLAG_NO_LAM = 1 << 4, + MTHCA_FLAG_FMR = 1 << 5, + MTHCA_FLAG_MEMFREE = 1 << 6, + MTHCA_FLAG_PCIE = 1 << 7, + MTHCA_FLAG_SINAI_OPT = 1 << 8 +}; + +enum { + MTHCA_MAX_PORTS = 2 +}; + +enum { + MTHCA_BOARD_ID_LEN = 64 +}; + +enum { + MTHCA_EQ_CONTEXT_SIZE = 0x40, + MTHCA_CQ_CONTEXT_SIZE = 0x40, + MTHCA_QP_CONTEXT_SIZE = 0x200, + MTHCA_RDB_ENTRY_SIZE = 0x20, + MTHCA_AV_SIZE = 0x20, + MTHCA_MGM_ENTRY_SIZE = 0x100, + + /* Arbel FW gives us these, but we need them for Tavor */ + MTHCA_MPT_ENTRY_SIZE = 0x40, + MTHCA_MTT_SEG_SIZE = 0x40, + + MTHCA_QP_PER_MGM = 4 * (MTHCA_MGM_ENTRY_SIZE / 16 - 2) +}; + +enum { + MTHCA_EQ_CMD, + MTHCA_EQ_ASYNC, + MTHCA_EQ_COMP, + MTHCA_NUM_EQ +}; + +enum { + MTHCA_OPCODE_NOP = 0x00, + MTHCA_OPCODE_RDMA_WRITE = 0x08, + MTHCA_OPCODE_RDMA_WRITE_IMM = 0x09, + MTHCA_OPCODE_SEND = 0x0a, + MTHCA_OPCODE_SEND_IMM = 0x0b, + MTHCA_OPCODE_RDMA_READ = 0x10, + MTHCA_OPCODE_ATOMIC_CS = 0x11, + MTHCA_OPCODE_ATOMIC_FA = 0x12, + MTHCA_OPCODE_BIND_MW = 0x18, +}; + +enum { + MTHCA_CMD_USE_EVENTS = 1 << 0, + MTHCA_CMD_POST_DOORBELLS = 1 << 1 +}; + +enum { + MTHCA_CMD_NUM_DBELL_DWORDS = 8 +}; + +struct mthca_cmd { + struct dma_pool *pool; + struct mutex hcr_mutex; + struct semaphore poll_sem; + struct semaphore event_sem; + int max_cmds; + spinlock_t context_lock; + int free_head; + struct mthca_cmd_context *context; + u16 token_mask; + u32 flags; + void __iomem *dbell_map; + u16 dbell_offsets[MTHCA_CMD_NUM_DBELL_DWORDS]; +}; + +struct mthca_limits { + int num_ports; + int vl_cap; + int mtu_cap; + int gid_table_len; + int pkey_table_len; + int local_ca_ack_delay; + int num_uars; + int max_sg; + int num_qps; + int max_wqes; + int max_desc_sz; + int max_qp_init_rdma; + int reserved_qps; + int num_srqs; + int max_srq_wqes; + int max_srq_sge; + int reserved_srqs; + int num_eecs; + int reserved_eecs; + int num_cqs; + int max_cqes; + int reserved_cqs; + int num_eqs; + int reserved_eqs; + int num_mpts; + int num_mtt_segs; + int mtt_seg_size; + int fmr_reserved_mtts; + int reserved_mtts; + int reserved_mrws; + int reserved_uars; + int num_mgms; + int num_amgms; + int reserved_mcgs; + int num_pds; + int reserved_pds; + u32 page_size_cap; + u32 flags; + u16 stat_rate_support; + u8 port_width_cap; +}; + +struct mthca_alloc { + u32 last; + u32 top; + u32 max; + u32 mask; + spinlock_t lock; + unsigned long *table; +}; + +struct mthca_array { + struct { + void **page; + int used; + } *page_list; +}; + +struct mthca_uar_table { + struct mthca_alloc alloc; + u64 uarc_base; + int uarc_size; +}; + +struct mthca_pd_table { + struct mthca_alloc alloc; +}; + +struct mthca_buddy { + unsigned long **bits; + int *num_free; + int max_order; + spinlock_t lock; +}; + +struct mthca_mr_table { + struct mthca_alloc mpt_alloc; + struct mthca_buddy mtt_buddy; + struct mthca_buddy *fmr_mtt_buddy; + u64 mtt_base; + u64 mpt_base; + struct mthca_icm_table *mtt_table; + struct mthca_icm_table *mpt_table; + struct { + void __iomem *mpt_base; + void __iomem *mtt_base; + struct mthca_buddy mtt_buddy; + } tavor_fmr; +}; + +struct mthca_eq_table { + struct mthca_alloc alloc; + void __iomem *clr_int; + u32 clr_mask; + u32 arm_mask; + struct mthca_eq eq[MTHCA_NUM_EQ]; + u64 icm_virt; + struct page *icm_page; + dma_addr_t icm_dma; + int have_irq; + u8 inta_pin; +}; + +struct mthca_cq_table { + struct mthca_alloc alloc; + spinlock_t lock; + struct mthca_array cq; + struct mthca_icm_table *table; +}; + +struct mthca_srq_table { + struct mthca_alloc alloc; + spinlock_t lock; + struct mthca_array srq; + struct mthca_icm_table *table; +}; + +struct mthca_qp_table { + struct mthca_alloc alloc; + u32 rdb_base; + int rdb_shift; + int sqp_start; + spinlock_t lock; + struct mthca_array qp; + struct mthca_icm_table *qp_table; + struct mthca_icm_table *eqp_table; + struct mthca_icm_table *rdb_table; +}; + +struct mthca_av_table { + struct dma_pool *pool; + int num_ddr_avs; + u64 ddr_av_base; + void __iomem *av_map; + struct mthca_alloc alloc; +}; + +struct mthca_mcg_table { + struct mutex mutex; + struct mthca_alloc alloc; + struct mthca_icm_table *table; +}; + +struct mthca_catas_err { + u64 addr; + u32 __iomem *map; + u32 size; + struct timer_list timer; + struct list_head list; +}; + +extern struct mutex mthca_device_mutex; + +struct mthca_dev { + struct ib_device ib_dev; + struct pci_dev *pdev; + + int hca_type; + unsigned long mthca_flags; + unsigned long device_cap_flags; + + u32 rev_id; + char board_id[MTHCA_BOARD_ID_LEN]; + + /* firmware info */ + u64 fw_ver; + union { + struct { + u64 fw_start; + u64 fw_end; + } tavor; + struct { + u64 clr_int_base; + u64 eq_arm_base; + u64 eq_set_ci_base; + struct mthca_icm *fw_icm; + struct mthca_icm *aux_icm; + u16 fw_pages; + } arbel; + } fw; + + u64 ddr_start; + u64 ddr_end; + + MTHCA_DECLARE_DOORBELL_LOCK(doorbell_lock) + struct mutex cap_mask_mutex; + + void __iomem *hcr; + void __iomem *kar; + void __iomem *clr_base; + union { + struct { + void __iomem *ecr_base; + } tavor; + struct { + void __iomem *eq_arm; + void __iomem *eq_set_ci_base; + } arbel; + } eq_regs; + + struct mthca_cmd cmd; + struct mthca_limits limits; + + struct mthca_uar_table uar_table; + struct mthca_pd_table pd_table; + struct mthca_mr_table mr_table; + struct mthca_eq_table eq_table; + struct mthca_cq_table cq_table; + struct mthca_srq_table srq_table; + struct mthca_qp_table qp_table; + struct mthca_av_table av_table; + struct mthca_mcg_table mcg_table; + + struct mthca_catas_err catas_err; + + struct mthca_uar driver_uar; + struct mthca_db_table *db_tab; + struct mthca_pd driver_pd; + struct mthca_mr driver_mr; + + struct ib_mad_agent *send_agent[MTHCA_MAX_PORTS][2]; + struct ib_ah *sm_ah[MTHCA_MAX_PORTS]; + spinlock_t sm_lock; + u8 rate[MTHCA_MAX_PORTS]; + bool active; +}; + +#ifdef CONFIG_INFINIBAND_MTHCA_DEBUG +extern int mthca_debug_level; + +#define mthca_dbg(mdev, format, arg...) \ + do { \ + if (mthca_debug_level) \ + dev_printk(KERN_DEBUG, &mdev->pdev->dev, format, ## arg); \ + } while (0) + +#else /* CONFIG_INFINIBAND_MTHCA_DEBUG */ + +#define mthca_dbg(mdev, format, arg...) do { (void) mdev; } while (0) + +#endif /* CONFIG_INFINIBAND_MTHCA_DEBUG */ + +#define mthca_err(mdev, format, arg...) \ + dev_err(&mdev->pdev->dev, format, ## arg) +#define mthca_info(mdev, format, arg...) \ + dev_info(&mdev->pdev->dev, format, ## arg) +#define mthca_warn(mdev, format, arg...) \ + dev_warn(&mdev->pdev->dev, format, ## arg) + +extern void __buggy_use_of_MTHCA_GET(void); +extern void __buggy_use_of_MTHCA_PUT(void); + +#define MTHCA_GET(dest, source, offset) \ + do { \ + void *__p = (char *) (source) + (offset); \ + switch (sizeof (dest)) { \ + case 1: (dest) = *(u8 *) __p; break; \ + case 2: (dest) = be16_to_cpup(__p); break; \ + case 4: (dest) = be32_to_cpup(__p); break; \ + case 8: (dest) = be64_to_cpup(__p); break; \ + default: __buggy_use_of_MTHCA_GET(); \ + } \ + } while (0) + +#define MTHCA_PUT(dest, source, offset) \ + do { \ + void *__d = ((char *) (dest) + (offset)); \ + switch (sizeof(source)) { \ + case 1: *(u8 *) __d = (source); break; \ + case 2: *(__be16 *) __d = cpu_to_be16(source); break; \ + case 4: *(__be32 *) __d = cpu_to_be32(source); break; \ + case 8: *(__be64 *) __d = cpu_to_be64(source); break; \ + default: __buggy_use_of_MTHCA_PUT(); \ + } \ + } while (0) + +int mthca_reset(struct mthca_dev *mdev); + +u32 mthca_alloc(struct mthca_alloc *alloc); +void mthca_free(struct mthca_alloc *alloc, u32 obj); +int mthca_alloc_init(struct mthca_alloc *alloc, u32 num, u32 mask, + u32 reserved); +void mthca_alloc_cleanup(struct mthca_alloc *alloc); +void *mthca_array_get(struct mthca_array *array, int index); +int mthca_array_set(struct mthca_array *array, int index, void *value); +void mthca_array_clear(struct mthca_array *array, int index); +int mthca_array_init(struct mthca_array *array, int nent); +void mthca_array_cleanup(struct mthca_array *array, int nent); +int mthca_buf_alloc(struct mthca_dev *dev, int size, int max_direct, + union mthca_buf *buf, int *is_direct, struct mthca_pd *pd, + int hca_write, struct mthca_mr *mr); +void mthca_buf_free(struct mthca_dev *dev, int size, union mthca_buf *buf, + int is_direct, struct mthca_mr *mr); + +int mthca_init_uar_table(struct mthca_dev *dev); +int mthca_init_pd_table(struct mthca_dev *dev); +int mthca_init_mr_table(struct mthca_dev *dev); +int mthca_init_eq_table(struct mthca_dev *dev); +int mthca_init_cq_table(struct mthca_dev *dev); +int mthca_init_srq_table(struct mthca_dev *dev); +int mthca_init_qp_table(struct mthca_dev *dev); +int mthca_init_av_table(struct mthca_dev *dev); +int mthca_init_mcg_table(struct mthca_dev *dev); + +void mthca_cleanup_uar_table(struct mthca_dev *dev); +void mthca_cleanup_pd_table(struct mthca_dev *dev); +void mthca_cleanup_mr_table(struct mthca_dev *dev); +void mthca_cleanup_eq_table(struct mthca_dev *dev); +void mthca_cleanup_cq_table(struct mthca_dev *dev); +void mthca_cleanup_srq_table(struct mthca_dev *dev); +void mthca_cleanup_qp_table(struct mthca_dev *dev); +void mthca_cleanup_av_table(struct mthca_dev *dev); +void mthca_cleanup_mcg_table(struct mthca_dev *dev); + +int mthca_register_device(struct mthca_dev *dev); +void mthca_unregister_device(struct mthca_dev *dev); + +void mthca_start_catas_poll(struct mthca_dev *dev); +void mthca_stop_catas_poll(struct mthca_dev *dev); +int __mthca_restart_one(struct pci_dev *pdev); +int mthca_catas_init(void); +void mthca_catas_cleanup(void); + +int mthca_uar_alloc(struct mthca_dev *dev, struct mthca_uar *uar); +void mthca_uar_free(struct mthca_dev *dev, struct mthca_uar *uar); + +int mthca_pd_alloc(struct mthca_dev *dev, int privileged, struct mthca_pd *pd); +void mthca_pd_free(struct mthca_dev *dev, struct mthca_pd *pd); + +int mthca_write_mtt_size(struct mthca_dev *dev); + +struct mthca_mtt *mthca_alloc_mtt(struct mthca_dev *dev, int size); +void mthca_free_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt); +int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt, + int start_index, u64 *buffer_list, int list_len); +int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift, + u64 iova, u64 total_size, u32 access, struct mthca_mr *mr); +int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd, + u32 access, struct mthca_mr *mr); +int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd, + u64 *buffer_list, int buffer_size_shift, + int list_len, u64 iova, u64 total_size, + u32 access, struct mthca_mr *mr); +void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr); + +int mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt); +void mthca_unmap_eq_icm(struct mthca_dev *dev); + +int mthca_poll_cq(struct ib_cq *ibcq, int num_entries, + struct ib_wc *entry); +int mthca_tavor_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags); +int mthca_arbel_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags); +int mthca_init_cq(struct mthca_dev *dev, int nent, + struct mthca_ucontext *ctx, u32 pdn, + struct mthca_cq *cq); +void mthca_free_cq(struct mthca_dev *dev, + struct mthca_cq *cq); +void mthca_cq_completion(struct mthca_dev *dev, u32 cqn); +void mthca_cq_event(struct mthca_dev *dev, u32 cqn, + enum ib_event_type event_type); +void mthca_cq_clean(struct mthca_dev *dev, struct mthca_cq *cq, u32 qpn, + struct mthca_srq *srq); +void mthca_cq_resize_copy_cqes(struct mthca_cq *cq); +int mthca_alloc_cq_buf(struct mthca_dev *dev, struct mthca_cq_buf *buf, int nent); +void mthca_free_cq_buf(struct mthca_dev *dev, struct mthca_cq_buf *buf, int cqe); + +int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd, + struct ib_srq_attr *attr, struct mthca_srq *srq, + struct ib_udata *udata); +void mthca_free_srq(struct mthca_dev *dev, struct mthca_srq *srq); +int mthca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, + enum ib_srq_attr_mask attr_mask, struct ib_udata *udata); +int mthca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr); +int mthca_max_srq_sge(struct mthca_dev *dev); +void mthca_srq_event(struct mthca_dev *dev, u32 srqn, + enum ib_event_type event_type); +void mthca_free_srq_wqe(struct mthca_srq *srq, u32 wqe_addr); +int mthca_tavor_post_srq_recv(struct ib_srq *srq, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr); +int mthca_arbel_post_srq_recv(struct ib_srq *srq, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr); + +void mthca_qp_event(struct mthca_dev *dev, u32 qpn, + enum ib_event_type event_type); +int mthca_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, + struct ib_qp_init_attr *qp_init_attr); +int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, + struct ib_udata *udata); +int mthca_tavor_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr); +int mthca_tavor_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr); +int mthca_arbel_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr); +int mthca_arbel_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr); +void mthca_free_err_wqe(struct mthca_dev *dev, struct mthca_qp *qp, int is_send, + int index, int *dbd, __be32 *new_wqe); +int mthca_alloc_qp(struct mthca_dev *dev, + struct mthca_pd *pd, + struct mthca_cq *send_cq, + struct mthca_cq *recv_cq, + enum ib_qp_type type, + enum ib_sig_type send_policy, + struct ib_qp_cap *cap, + struct mthca_qp *qp, + struct ib_udata *udata); +int mthca_alloc_sqp(struct mthca_dev *dev, + struct mthca_pd *pd, + struct mthca_cq *send_cq, + struct mthca_cq *recv_cq, + enum ib_sig_type send_policy, + struct ib_qp_cap *cap, + int qpn, + int port, + struct mthca_qp *qp, + struct ib_udata *udata); +void mthca_free_qp(struct mthca_dev *dev, struct mthca_qp *qp); +int mthca_create_ah(struct mthca_dev *dev, + struct mthca_pd *pd, + struct rdma_ah_attr *ah_attr, + struct mthca_ah *ah); +int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah); +int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah, + struct ib_ud_header *header); +int mthca_ah_query(struct ib_ah *ibah, struct rdma_ah_attr *attr); +int mthca_ah_grh_present(struct mthca_ah *ah); +u8 mthca_get_rate(struct mthca_dev *dev, int static_rate, u8 port); +enum ib_rate mthca_rate_to_ib(struct mthca_dev *dev, u8 mthca_rate, u8 port); + +int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid); +int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid); + +int mthca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, + const struct ib_wc *in_wc, const struct ib_grh *in_grh, + const struct ib_mad *in, struct ib_mad *out, + size_t *out_mad_size, u16 *out_mad_pkey_index); +int mthca_create_agents(struct mthca_dev *dev); +void mthca_free_agents(struct mthca_dev *dev); + +static inline struct mthca_dev *to_mdev(struct ib_device *ibdev) +{ + return container_of(ibdev, struct mthca_dev, ib_dev); +} + +static inline int mthca_is_memfree(struct mthca_dev *dev) +{ + return dev->mthca_flags & MTHCA_FLAG_MEMFREE; +} + +#endif /* MTHCA_DEV_H */ diff --git a/drivers/infiniband/hw/mthca/mthca_doorbell.h b/drivers/infiniband/hw/mthca/mthca_doorbell.h new file mode 100644 index 000000000..14f51ef97 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_doorbell.h @@ -0,0 +1,109 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/types.h> + +#define MTHCA_RD_DOORBELL 0x00 +#define MTHCA_SEND_DOORBELL 0x10 +#define MTHCA_RECEIVE_DOORBELL 0x18 +#define MTHCA_CQ_DOORBELL 0x20 +#define MTHCA_EQ_DOORBELL 0x28 + +#if BITS_PER_LONG == 64 +/* + * Assume that we can just write a 64-bit doorbell atomically. s390 + * actually doesn't have writeq() but S/390 systems don't even have + * PCI so we won't worry about it. + */ + +#define MTHCA_DECLARE_DOORBELL_LOCK(name) +#define MTHCA_INIT_DOORBELL_LOCK(ptr) do { } while (0) +#define MTHCA_GET_DOORBELL_LOCK(ptr) (NULL) + +static inline void mthca_write64_raw(__be64 val, void __iomem *dest) +{ + __raw_writeq((__force u64) val, dest); +} + +static inline void mthca_write64(u32 hi, u32 lo, void __iomem *dest, + spinlock_t *doorbell_lock) +{ + __raw_writeq((__force u64) cpu_to_be64((u64) hi << 32 | lo), dest); +} + +static inline void mthca_write_db_rec(__be32 val[2], __be32 *db) +{ + *(u64 *) db = *(u64 *) val; +} + +#else + +/* + * Just fall back to a spinlock to protect the doorbell if + * BITS_PER_LONG is 32 -- there's no portable way to do atomic 64-bit + * MMIO writes. + */ + +#define MTHCA_DECLARE_DOORBELL_LOCK(name) spinlock_t name; +#define MTHCA_INIT_DOORBELL_LOCK(ptr) spin_lock_init(ptr) +#define MTHCA_GET_DOORBELL_LOCK(ptr) (ptr) + +static inline void mthca_write64_raw(__be64 val, void __iomem *dest) +{ + __raw_writel(((__force u32 *) &val)[0], dest); + __raw_writel(((__force u32 *) &val)[1], dest + 4); +} + +static inline void mthca_write64(u32 hi, u32 lo, void __iomem *dest, + spinlock_t *doorbell_lock) +{ + unsigned long flags; + + hi = (__force u32) cpu_to_be32(hi); + lo = (__force u32) cpu_to_be32(lo); + + spin_lock_irqsave(doorbell_lock, flags); + __raw_writel(hi, dest); + __raw_writel(lo, dest + 4); + spin_unlock_irqrestore(doorbell_lock, flags); +} + +static inline void mthca_write_db_rec(__be32 val[2], __be32 *db) +{ + db[0] = val[0]; + wmb(); + db[1] = val[1]; +} + +#endif diff --git a/drivers/infiniband/hw/mthca/mthca_eq.c b/drivers/infiniband/hw/mthca/mthca_eq.c new file mode 100644 index 000000000..2cdf68620 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_eq.c @@ -0,0 +1,905 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/slab.h> + +#include "mthca_dev.h" +#include "mthca_cmd.h" +#include "mthca_config_reg.h" + +enum { + MTHCA_NUM_ASYNC_EQE = 0x80, + MTHCA_NUM_CMD_EQE = 0x80, + MTHCA_NUM_SPARE_EQE = 0x80, + MTHCA_EQ_ENTRY_SIZE = 0x20 +}; + +/* + * Must be packed because start is 64 bits but only aligned to 32 bits. + */ +struct mthca_eq_context { + __be32 flags; + __be64 start; + __be32 logsize_usrpage; + __be32 tavor_pd; /* reserved for Arbel */ + u8 reserved1[3]; + u8 intr; + __be32 arbel_pd; /* lost_count for Tavor */ + __be32 lkey; + u32 reserved2[2]; + __be32 consumer_index; + __be32 producer_index; + u32 reserved3[4]; +} __packed; + +#define MTHCA_EQ_STATUS_OK ( 0 << 28) +#define MTHCA_EQ_STATUS_OVERFLOW ( 9 << 28) +#define MTHCA_EQ_STATUS_WRITE_FAIL (10 << 28) +#define MTHCA_EQ_OWNER_SW ( 0 << 24) +#define MTHCA_EQ_OWNER_HW ( 1 << 24) +#define MTHCA_EQ_FLAG_TR ( 1 << 18) +#define MTHCA_EQ_FLAG_OI ( 1 << 17) +#define MTHCA_EQ_STATE_ARMED ( 1 << 8) +#define MTHCA_EQ_STATE_FIRED ( 2 << 8) +#define MTHCA_EQ_STATE_ALWAYS_ARMED ( 3 << 8) +#define MTHCA_EQ_STATE_ARBEL ( 8 << 8) + +enum { + MTHCA_EVENT_TYPE_COMP = 0x00, + MTHCA_EVENT_TYPE_PATH_MIG = 0x01, + MTHCA_EVENT_TYPE_COMM_EST = 0x02, + MTHCA_EVENT_TYPE_SQ_DRAINED = 0x03, + MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE = 0x13, + MTHCA_EVENT_TYPE_SRQ_LIMIT = 0x14, + MTHCA_EVENT_TYPE_CQ_ERROR = 0x04, + MTHCA_EVENT_TYPE_WQ_CATAS_ERROR = 0x05, + MTHCA_EVENT_TYPE_EEC_CATAS_ERROR = 0x06, + MTHCA_EVENT_TYPE_PATH_MIG_FAILED = 0x07, + MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR = 0x10, + MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR = 0x11, + MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR = 0x12, + MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR = 0x08, + MTHCA_EVENT_TYPE_PORT_CHANGE = 0x09, + MTHCA_EVENT_TYPE_EQ_OVERFLOW = 0x0f, + MTHCA_EVENT_TYPE_ECC_DETECT = 0x0e, + MTHCA_EVENT_TYPE_CMD = 0x0a +}; + +#define MTHCA_ASYNC_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_PATH_MIG) | \ + (1ULL << MTHCA_EVENT_TYPE_COMM_EST) | \ + (1ULL << MTHCA_EVENT_TYPE_SQ_DRAINED) | \ + (1ULL << MTHCA_EVENT_TYPE_CQ_ERROR) | \ + (1ULL << MTHCA_EVENT_TYPE_WQ_CATAS_ERROR) | \ + (1ULL << MTHCA_EVENT_TYPE_EEC_CATAS_ERROR) | \ + (1ULL << MTHCA_EVENT_TYPE_PATH_MIG_FAILED) | \ + (1ULL << MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \ + (1ULL << MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR) | \ + (1ULL << MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR) | \ + (1ULL << MTHCA_EVENT_TYPE_PORT_CHANGE) | \ + (1ULL << MTHCA_EVENT_TYPE_ECC_DETECT)) +#define MTHCA_SRQ_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR) | \ + (1ULL << MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE) | \ + (1ULL << MTHCA_EVENT_TYPE_SRQ_LIMIT)) +#define MTHCA_CMD_EVENT_MASK (1ULL << MTHCA_EVENT_TYPE_CMD) + +#define MTHCA_EQ_DB_INC_CI (1 << 24) +#define MTHCA_EQ_DB_REQ_NOT (2 << 24) +#define MTHCA_EQ_DB_DISARM_CQ (3 << 24) +#define MTHCA_EQ_DB_SET_CI (4 << 24) +#define MTHCA_EQ_DB_ALWAYS_ARM (5 << 24) + +struct mthca_eqe { + u8 reserved1; + u8 type; + u8 reserved2; + u8 subtype; + union { + u32 raw[6]; + struct { + __be32 cqn; + } __packed comp; + struct { + u16 reserved1; + __be16 token; + u32 reserved2; + u8 reserved3[3]; + u8 status; + __be64 out_param; + } __packed cmd; + struct { + __be32 qpn; + } __packed qp; + struct { + __be32 srqn; + } __packed srq; + struct { + __be32 cqn; + u32 reserved1; + u8 reserved2[3]; + u8 syndrome; + } __packed cq_err; + struct { + u32 reserved1[2]; + __be32 port; + } __packed port_change; + } event; + u8 reserved3[3]; + u8 owner; +} __packed; + +#define MTHCA_EQ_ENTRY_OWNER_SW (0 << 7) +#define MTHCA_EQ_ENTRY_OWNER_HW (1 << 7) + +static inline u64 async_mask(struct mthca_dev *dev) +{ + return dev->mthca_flags & MTHCA_FLAG_SRQ ? + MTHCA_ASYNC_EVENT_MASK | MTHCA_SRQ_EVENT_MASK : + MTHCA_ASYNC_EVENT_MASK; +} + +static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci) +{ + /* + * This barrier makes sure that all updates to ownership bits + * done by set_eqe_hw() hit memory before the consumer index + * is updated. set_eq_ci() allows the HCA to possibly write + * more EQ entries, and we want to avoid the exceedingly + * unlikely possibility of the HCA writing an entry and then + * having set_eqe_hw() overwrite the owner field. + */ + wmb(); + mthca_write64(MTHCA_EQ_DB_SET_CI | eq->eqn, ci & (eq->nent - 1), + dev->kar + MTHCA_EQ_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); +} + +static inline void arbel_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci) +{ + /* See comment in tavor_set_eq_ci() above. */ + wmb(); + __raw_writel((__force u32) cpu_to_be32(ci), + dev->eq_regs.arbel.eq_set_ci_base + eq->eqn * 8); + /* We still want ordering, just not swabbing, so add a barrier */ + mb(); +} + +static inline void set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci) +{ + if (mthca_is_memfree(dev)) + arbel_set_eq_ci(dev, eq, ci); + else + tavor_set_eq_ci(dev, eq, ci); +} + +static inline void tavor_eq_req_not(struct mthca_dev *dev, int eqn) +{ + mthca_write64(MTHCA_EQ_DB_REQ_NOT | eqn, 0, + dev->kar + MTHCA_EQ_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); +} + +static inline void arbel_eq_req_not(struct mthca_dev *dev, u32 eqn_mask) +{ + writel(eqn_mask, dev->eq_regs.arbel.eq_arm); +} + +static inline void disarm_cq(struct mthca_dev *dev, int eqn, int cqn) +{ + if (!mthca_is_memfree(dev)) { + mthca_write64(MTHCA_EQ_DB_DISARM_CQ | eqn, cqn, + dev->kar + MTHCA_EQ_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); + } +} + +static inline struct mthca_eqe *get_eqe(struct mthca_eq *eq, u32 entry) +{ + unsigned long off = (entry & (eq->nent - 1)) * MTHCA_EQ_ENTRY_SIZE; + return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE; +} + +static inline struct mthca_eqe *next_eqe_sw(struct mthca_eq *eq) +{ + struct mthca_eqe *eqe; + eqe = get_eqe(eq, eq->cons_index); + return (MTHCA_EQ_ENTRY_OWNER_HW & eqe->owner) ? NULL : eqe; +} + +static inline void set_eqe_hw(struct mthca_eqe *eqe) +{ + eqe->owner = MTHCA_EQ_ENTRY_OWNER_HW; +} + +static void port_change(struct mthca_dev *dev, int port, int active) +{ + struct ib_event record; + + mthca_dbg(dev, "Port change to %s for port %d\n", + active ? "active" : "down", port); + + record.device = &dev->ib_dev; + record.event = active ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR; + record.element.port_num = port; + + ib_dispatch_event(&record); +} + +static int mthca_eq_int(struct mthca_dev *dev, struct mthca_eq *eq) +{ + struct mthca_eqe *eqe; + int disarm_cqn; + int eqes_found = 0; + int set_ci = 0; + + while ((eqe = next_eqe_sw(eq))) { + /* + * Make sure we read EQ entry contents after we've + * checked the ownership bit. + */ + rmb(); + + switch (eqe->type) { + case MTHCA_EVENT_TYPE_COMP: + disarm_cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff; + disarm_cq(dev, eq->eqn, disarm_cqn); + mthca_cq_completion(dev, disarm_cqn); + break; + + case MTHCA_EVENT_TYPE_PATH_MIG: + mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, + IB_EVENT_PATH_MIG); + break; + + case MTHCA_EVENT_TYPE_COMM_EST: + mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, + IB_EVENT_COMM_EST); + break; + + case MTHCA_EVENT_TYPE_SQ_DRAINED: + mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, + IB_EVENT_SQ_DRAINED); + break; + + case MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE: + mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, + IB_EVENT_QP_LAST_WQE_REACHED); + break; + + case MTHCA_EVENT_TYPE_SRQ_LIMIT: + mthca_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 0xffffff, + IB_EVENT_SRQ_LIMIT_REACHED); + break; + + case MTHCA_EVENT_TYPE_WQ_CATAS_ERROR: + mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, + IB_EVENT_QP_FATAL); + break; + + case MTHCA_EVENT_TYPE_PATH_MIG_FAILED: + mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, + IB_EVENT_PATH_MIG_ERR); + break; + + case MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR: + mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, + IB_EVENT_QP_REQ_ERR); + break; + + case MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR: + mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, + IB_EVENT_QP_ACCESS_ERR); + break; + + case MTHCA_EVENT_TYPE_CMD: + mthca_cmd_event(dev, + be16_to_cpu(eqe->event.cmd.token), + eqe->event.cmd.status, + be64_to_cpu(eqe->event.cmd.out_param)); + break; + + case MTHCA_EVENT_TYPE_PORT_CHANGE: + port_change(dev, + (be32_to_cpu(eqe->event.port_change.port) >> 28) & 3, + eqe->subtype == 0x4); + break; + + case MTHCA_EVENT_TYPE_CQ_ERROR: + mthca_warn(dev, "CQ %s on CQN %06x\n", + eqe->event.cq_err.syndrome == 1 ? + "overrun" : "access violation", + be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff); + mthca_cq_event(dev, be32_to_cpu(eqe->event.cq_err.cqn), + IB_EVENT_CQ_ERR); + break; + + case MTHCA_EVENT_TYPE_EQ_OVERFLOW: + mthca_warn(dev, "EQ overrun on EQN %d\n", eq->eqn); + break; + + case MTHCA_EVENT_TYPE_EEC_CATAS_ERROR: + case MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR: + case MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR: + case MTHCA_EVENT_TYPE_ECC_DETECT: + default: + mthca_warn(dev, "Unhandled event %02x(%02x) on EQ %d\n", + eqe->type, eqe->subtype, eq->eqn); + break; + } + + set_eqe_hw(eqe); + ++eq->cons_index; + eqes_found = 1; + ++set_ci; + + /* + * The HCA will think the queue has overflowed if we + * don't tell it we've been processing events. We + * create our EQs with MTHCA_NUM_SPARE_EQE extra + * entries, so we must update our consumer index at + * least that often. + */ + if (unlikely(set_ci >= MTHCA_NUM_SPARE_EQE)) { + /* + * Conditional on hca_type is OK here because + * this is a rare case, not the fast path. + */ + set_eq_ci(dev, eq, eq->cons_index); + set_ci = 0; + } + } + + /* + * Rely on caller to set consumer index so that we don't have + * to test hca_type in our interrupt handling fast path. + */ + return eqes_found; +} + +static irqreturn_t mthca_tavor_interrupt(int irq, void *dev_ptr) +{ + struct mthca_dev *dev = dev_ptr; + u32 ecr; + int i; + + if (dev->eq_table.clr_mask) + writel(dev->eq_table.clr_mask, dev->eq_table.clr_int); + + ecr = readl(dev->eq_regs.tavor.ecr_base + 4); + if (!ecr) + return IRQ_NONE; + + writel(ecr, dev->eq_regs.tavor.ecr_base + + MTHCA_ECR_CLR_BASE - MTHCA_ECR_BASE + 4); + + for (i = 0; i < MTHCA_NUM_EQ; ++i) + if (ecr & dev->eq_table.eq[i].eqn_mask) { + if (mthca_eq_int(dev, &dev->eq_table.eq[i])) + tavor_set_eq_ci(dev, &dev->eq_table.eq[i], + dev->eq_table.eq[i].cons_index); + tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn); + } + + return IRQ_HANDLED; +} + +static irqreturn_t mthca_tavor_msi_x_interrupt(int irq, void *eq_ptr) +{ + struct mthca_eq *eq = eq_ptr; + struct mthca_dev *dev = eq->dev; + + mthca_eq_int(dev, eq); + tavor_set_eq_ci(dev, eq, eq->cons_index); + tavor_eq_req_not(dev, eq->eqn); + + /* MSI-X vectors always belong to us */ + return IRQ_HANDLED; +} + +static irqreturn_t mthca_arbel_interrupt(int irq, void *dev_ptr) +{ + struct mthca_dev *dev = dev_ptr; + int work = 0; + int i; + + if (dev->eq_table.clr_mask) + writel(dev->eq_table.clr_mask, dev->eq_table.clr_int); + + for (i = 0; i < MTHCA_NUM_EQ; ++i) + if (mthca_eq_int(dev, &dev->eq_table.eq[i])) { + work = 1; + arbel_set_eq_ci(dev, &dev->eq_table.eq[i], + dev->eq_table.eq[i].cons_index); + } + + arbel_eq_req_not(dev, dev->eq_table.arm_mask); + + return IRQ_RETVAL(work); +} + +static irqreturn_t mthca_arbel_msi_x_interrupt(int irq, void *eq_ptr) +{ + struct mthca_eq *eq = eq_ptr; + struct mthca_dev *dev = eq->dev; + + mthca_eq_int(dev, eq); + arbel_set_eq_ci(dev, eq, eq->cons_index); + arbel_eq_req_not(dev, eq->eqn_mask); + + /* MSI-X vectors always belong to us */ + return IRQ_HANDLED; +} + +static int mthca_create_eq(struct mthca_dev *dev, + int nent, + u8 intr, + struct mthca_eq *eq) +{ + int npages; + u64 *dma_list = NULL; + dma_addr_t t; + struct mthca_mailbox *mailbox; + struct mthca_eq_context *eq_context; + int err = -ENOMEM; + int i; + + eq->dev = dev; + eq->nent = roundup_pow_of_two(max(nent, 2)); + npages = ALIGN(eq->nent * MTHCA_EQ_ENTRY_SIZE, PAGE_SIZE) / PAGE_SIZE; + + eq->page_list = kmalloc_array(npages, sizeof(*eq->page_list), + GFP_KERNEL); + if (!eq->page_list) + goto err_out; + + for (i = 0; i < npages; ++i) + eq->page_list[i].buf = NULL; + + dma_list = kmalloc_array(npages, sizeof(*dma_list), GFP_KERNEL); + if (!dma_list) + goto err_out_free; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + goto err_out_free; + eq_context = mailbox->buf; + + for (i = 0; i < npages; ++i) { + eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev, + PAGE_SIZE, &t, GFP_KERNEL); + if (!eq->page_list[i].buf) + goto err_out_free_pages; + + dma_list[i] = t; + dma_unmap_addr_set(&eq->page_list[i], mapping, t); + + clear_page(eq->page_list[i].buf); + } + + for (i = 0; i < eq->nent; ++i) + set_eqe_hw(get_eqe(eq, i)); + + eq->eqn = mthca_alloc(&dev->eq_table.alloc); + if (eq->eqn == -1) + goto err_out_free_pages; + + err = mthca_mr_alloc_phys(dev, dev->driver_pd.pd_num, + dma_list, PAGE_SHIFT, npages, + 0, npages * PAGE_SIZE, + MTHCA_MPT_FLAG_LOCAL_WRITE | + MTHCA_MPT_FLAG_LOCAL_READ, + &eq->mr); + if (err) + goto err_out_free_eq; + + memset(eq_context, 0, sizeof *eq_context); + eq_context->flags = cpu_to_be32(MTHCA_EQ_STATUS_OK | + MTHCA_EQ_OWNER_HW | + MTHCA_EQ_STATE_ARMED | + MTHCA_EQ_FLAG_TR); + if (mthca_is_memfree(dev)) + eq_context->flags |= cpu_to_be32(MTHCA_EQ_STATE_ARBEL); + + eq_context->logsize_usrpage = cpu_to_be32((ffs(eq->nent) - 1) << 24); + if (mthca_is_memfree(dev)) { + eq_context->arbel_pd = cpu_to_be32(dev->driver_pd.pd_num); + } else { + eq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index); + eq_context->tavor_pd = cpu_to_be32(dev->driver_pd.pd_num); + } + eq_context->intr = intr; + eq_context->lkey = cpu_to_be32(eq->mr.ibmr.lkey); + + err = mthca_SW2HW_EQ(dev, mailbox, eq->eqn); + if (err) { + mthca_warn(dev, "SW2HW_EQ returned %d\n", err); + goto err_out_free_mr; + } + + kfree(dma_list); + mthca_free_mailbox(dev, mailbox); + + eq->eqn_mask = swab32(1 << eq->eqn); + eq->cons_index = 0; + + dev->eq_table.arm_mask |= eq->eqn_mask; + + mthca_dbg(dev, "Allocated EQ %d with %d entries\n", + eq->eqn, eq->nent); + + return err; + + err_out_free_mr: + mthca_free_mr(dev, &eq->mr); + + err_out_free_eq: + mthca_free(&dev->eq_table.alloc, eq->eqn); + + err_out_free_pages: + for (i = 0; i < npages; ++i) + if (eq->page_list[i].buf) + dma_free_coherent(&dev->pdev->dev, PAGE_SIZE, + eq->page_list[i].buf, + dma_unmap_addr(&eq->page_list[i], + mapping)); + + mthca_free_mailbox(dev, mailbox); + + err_out_free: + kfree(eq->page_list); + kfree(dma_list); + + err_out: + return err; +} + +static void mthca_free_eq(struct mthca_dev *dev, + struct mthca_eq *eq) +{ + struct mthca_mailbox *mailbox; + int err; + int npages = (eq->nent * MTHCA_EQ_ENTRY_SIZE + PAGE_SIZE - 1) / + PAGE_SIZE; + int i; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return; + + err = mthca_HW2SW_EQ(dev, mailbox, eq->eqn); + if (err) + mthca_warn(dev, "HW2SW_EQ returned %d\n", err); + + dev->eq_table.arm_mask &= ~eq->eqn_mask; + + if (0) { + mthca_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn); + for (i = 0; i < sizeof (struct mthca_eq_context) / 4; ++i) { + if (i % 4 == 0) + printk("[%02x] ", i * 4); + printk(" %08x", be32_to_cpup(mailbox->buf + i * 4)); + if ((i + 1) % 4 == 0) + printk("\n"); + } + } + + mthca_free_mr(dev, &eq->mr); + for (i = 0; i < npages; ++i) + pci_free_consistent(dev->pdev, PAGE_SIZE, + eq->page_list[i].buf, + dma_unmap_addr(&eq->page_list[i], mapping)); + + kfree(eq->page_list); + mthca_free_mailbox(dev, mailbox); +} + +static void mthca_free_irqs(struct mthca_dev *dev) +{ + int i; + + if (dev->eq_table.have_irq) + free_irq(dev->pdev->irq, dev); + for (i = 0; i < MTHCA_NUM_EQ; ++i) + if (dev->eq_table.eq[i].have_irq) { + free_irq(dev->eq_table.eq[i].msi_x_vector, + dev->eq_table.eq + i); + dev->eq_table.eq[i].have_irq = 0; + } +} + +static int mthca_map_reg(struct mthca_dev *dev, + unsigned long offset, unsigned long size, + void __iomem **map) +{ + phys_addr_t base = pci_resource_start(dev->pdev, 0); + + *map = ioremap(base + offset, size); + if (!*map) + return -ENOMEM; + + return 0; +} + +static int mthca_map_eq_regs(struct mthca_dev *dev) +{ + if (mthca_is_memfree(dev)) { + /* + * We assume that the EQ arm and EQ set CI registers + * fall within the first BAR. We can't trust the + * values firmware gives us, since those addresses are + * valid on the HCA's side of the PCI bus but not + * necessarily the host side. + */ + if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) & + dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE, + &dev->clr_base)) { + mthca_err(dev, "Couldn't map interrupt clear register, " + "aborting.\n"); + return -ENOMEM; + } + + /* + * Add 4 because we limit ourselves to EQs 0 ... 31, + * so we only need the low word of the register. + */ + if (mthca_map_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) & + dev->fw.arbel.eq_arm_base) + 4, 4, + &dev->eq_regs.arbel.eq_arm)) { + mthca_err(dev, "Couldn't map EQ arm register, aborting.\n"); + iounmap(dev->clr_base); + return -ENOMEM; + } + + if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) & + dev->fw.arbel.eq_set_ci_base, + MTHCA_EQ_SET_CI_SIZE, + &dev->eq_regs.arbel.eq_set_ci_base)) { + mthca_err(dev, "Couldn't map EQ CI register, aborting.\n"); + iounmap(dev->eq_regs.arbel.eq_arm); + iounmap(dev->clr_base); + return -ENOMEM; + } + } else { + if (mthca_map_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE, + &dev->clr_base)) { + mthca_err(dev, "Couldn't map interrupt clear register, " + "aborting.\n"); + return -ENOMEM; + } + + if (mthca_map_reg(dev, MTHCA_ECR_BASE, + MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE, + &dev->eq_regs.tavor.ecr_base)) { + mthca_err(dev, "Couldn't map ecr register, " + "aborting.\n"); + iounmap(dev->clr_base); + return -ENOMEM; + } + } + + return 0; + +} + +static void mthca_unmap_eq_regs(struct mthca_dev *dev) +{ + if (mthca_is_memfree(dev)) { + iounmap(dev->eq_regs.arbel.eq_set_ci_base); + iounmap(dev->eq_regs.arbel.eq_arm); + iounmap(dev->clr_base); + } else { + iounmap(dev->eq_regs.tavor.ecr_base); + iounmap(dev->clr_base); + } +} + +int mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt) +{ + int ret; + + /* + * We assume that mapping one page is enough for the whole EQ + * context table. This is fine with all current HCAs, because + * we only use 32 EQs and each EQ uses 32 bytes of context + * memory, or 1 KB total. + */ + dev->eq_table.icm_virt = icm_virt; + dev->eq_table.icm_page = alloc_page(GFP_HIGHUSER); + if (!dev->eq_table.icm_page) + return -ENOMEM; + dev->eq_table.icm_dma = pci_map_page(dev->pdev, dev->eq_table.icm_page, 0, + PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); + if (pci_dma_mapping_error(dev->pdev, dev->eq_table.icm_dma)) { + __free_page(dev->eq_table.icm_page); + return -ENOMEM; + } + + ret = mthca_MAP_ICM_page(dev, dev->eq_table.icm_dma, icm_virt); + if (ret) { + pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE, + PCI_DMA_BIDIRECTIONAL); + __free_page(dev->eq_table.icm_page); + } + + return ret; +} + +void mthca_unmap_eq_icm(struct mthca_dev *dev) +{ + mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, 1); + pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE, + PCI_DMA_BIDIRECTIONAL); + __free_page(dev->eq_table.icm_page); +} + +int mthca_init_eq_table(struct mthca_dev *dev) +{ + int err; + u8 intr; + int i; + + err = mthca_alloc_init(&dev->eq_table.alloc, + dev->limits.num_eqs, + dev->limits.num_eqs - 1, + dev->limits.reserved_eqs); + if (err) + return err; + + err = mthca_map_eq_regs(dev); + if (err) + goto err_out_free; + + if (dev->mthca_flags & MTHCA_FLAG_MSI_X) { + dev->eq_table.clr_mask = 0; + } else { + dev->eq_table.clr_mask = + swab32(1 << (dev->eq_table.inta_pin & 31)); + dev->eq_table.clr_int = dev->clr_base + + (dev->eq_table.inta_pin < 32 ? 4 : 0); + } + + dev->eq_table.arm_mask = 0; + + intr = dev->eq_table.inta_pin; + + err = mthca_create_eq(dev, dev->limits.num_cqs + MTHCA_NUM_SPARE_EQE, + (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 128 : intr, + &dev->eq_table.eq[MTHCA_EQ_COMP]); + if (err) + goto err_out_unmap; + + err = mthca_create_eq(dev, MTHCA_NUM_ASYNC_EQE + MTHCA_NUM_SPARE_EQE, + (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 129 : intr, + &dev->eq_table.eq[MTHCA_EQ_ASYNC]); + if (err) + goto err_out_comp; + + err = mthca_create_eq(dev, MTHCA_NUM_CMD_EQE + MTHCA_NUM_SPARE_EQE, + (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 130 : intr, + &dev->eq_table.eq[MTHCA_EQ_CMD]); + if (err) + goto err_out_async; + + if (dev->mthca_flags & MTHCA_FLAG_MSI_X) { + static const char *eq_name[] = { + [MTHCA_EQ_COMP] = DRV_NAME "-comp", + [MTHCA_EQ_ASYNC] = DRV_NAME "-async", + [MTHCA_EQ_CMD] = DRV_NAME "-cmd" + }; + + for (i = 0; i < MTHCA_NUM_EQ; ++i) { + snprintf(dev->eq_table.eq[i].irq_name, + IB_DEVICE_NAME_MAX, + "%s@pci:%s", eq_name[i], + pci_name(dev->pdev)); + err = request_irq(dev->eq_table.eq[i].msi_x_vector, + mthca_is_memfree(dev) ? + mthca_arbel_msi_x_interrupt : + mthca_tavor_msi_x_interrupt, + 0, dev->eq_table.eq[i].irq_name, + dev->eq_table.eq + i); + if (err) + goto err_out_cmd; + dev->eq_table.eq[i].have_irq = 1; + } + } else { + snprintf(dev->eq_table.eq[0].irq_name, IB_DEVICE_NAME_MAX, + DRV_NAME "@pci:%s", pci_name(dev->pdev)); + err = request_irq(dev->pdev->irq, + mthca_is_memfree(dev) ? + mthca_arbel_interrupt : + mthca_tavor_interrupt, + IRQF_SHARED, dev->eq_table.eq[0].irq_name, dev); + if (err) + goto err_out_cmd; + dev->eq_table.have_irq = 1; + } + + err = mthca_MAP_EQ(dev, async_mask(dev), + 0, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn); + if (err) + mthca_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n", + dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, err); + + err = mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK, + 0, dev->eq_table.eq[MTHCA_EQ_CMD].eqn); + if (err) + mthca_warn(dev, "MAP_EQ for cmd EQ %d failed (%d)\n", + dev->eq_table.eq[MTHCA_EQ_CMD].eqn, err); + + for (i = 0; i < MTHCA_NUM_EQ; ++i) + if (mthca_is_memfree(dev)) + arbel_eq_req_not(dev, dev->eq_table.eq[i].eqn_mask); + else + tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn); + + return 0; + +err_out_cmd: + mthca_free_irqs(dev); + mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_CMD]); + +err_out_async: + mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_ASYNC]); + +err_out_comp: + mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_COMP]); + +err_out_unmap: + mthca_unmap_eq_regs(dev); + +err_out_free: + mthca_alloc_cleanup(&dev->eq_table.alloc); + return err; +} + +void mthca_cleanup_eq_table(struct mthca_dev *dev) +{ + int i; + + mthca_free_irqs(dev); + + mthca_MAP_EQ(dev, async_mask(dev), + 1, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn); + mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK, + 1, dev->eq_table.eq[MTHCA_EQ_CMD].eqn); + + for (i = 0; i < MTHCA_NUM_EQ; ++i) + mthca_free_eq(dev, &dev->eq_table.eq[i]); + + mthca_unmap_eq_regs(dev); + + mthca_alloc_cleanup(&dev->eq_table.alloc); +} diff --git a/drivers/infiniband/hw/mthca/mthca_mad.c b/drivers/infiniband/hw/mthca/mthca_mad.c new file mode 100644 index 000000000..99aa8183a --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_mad.c @@ -0,0 +1,341 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * Copyright (c) 2004 Voltaire, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/string.h> +#include <linux/slab.h> + +#include <rdma/ib_verbs.h> +#include <rdma/ib_mad.h> +#include <rdma/ib_smi.h> + +#include "mthca_dev.h" +#include "mthca_cmd.h" + +enum { + MTHCA_VENDOR_CLASS1 = 0x9, + MTHCA_VENDOR_CLASS2 = 0xa +}; + +static int mthca_update_rate(struct mthca_dev *dev, u8 port_num) +{ + struct ib_port_attr *tprops = NULL; + int ret; + + tprops = kmalloc(sizeof *tprops, GFP_KERNEL); + if (!tprops) + return -ENOMEM; + + ret = ib_query_port(&dev->ib_dev, port_num, tprops); + if (ret) { + dev_warn(&dev->ib_dev.dev, + "ib_query_port failed (%d) forport %d\n", ret, + port_num); + goto out; + } + + dev->rate[port_num - 1] = tprops->active_speed * + ib_width_enum_to_int(tprops->active_width); + +out: + kfree(tprops); + return ret; +} + +static void update_sm_ah(struct mthca_dev *dev, + u8 port_num, u16 lid, u8 sl) +{ + struct ib_ah *new_ah; + struct rdma_ah_attr ah_attr; + unsigned long flags; + + if (!dev->send_agent[port_num - 1][0]) + return; + + memset(&ah_attr, 0, sizeof ah_attr); + ah_attr.type = rdma_ah_find_type(&dev->ib_dev, port_num); + rdma_ah_set_dlid(&ah_attr, lid); + rdma_ah_set_sl(&ah_attr, sl); + rdma_ah_set_port_num(&ah_attr, port_num); + + new_ah = rdma_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, + &ah_attr, 0); + if (IS_ERR(new_ah)) + return; + + spin_lock_irqsave(&dev->sm_lock, flags); + if (dev->sm_ah[port_num - 1]) + rdma_destroy_ah(dev->sm_ah[port_num - 1], 0); + dev->sm_ah[port_num - 1] = new_ah; + spin_unlock_irqrestore(&dev->sm_lock, flags); +} + +/* + * Snoop SM MADs for port info and P_Key table sets, so we can + * synthesize LID change and P_Key change events. + */ +static void smp_snoop(struct ib_device *ibdev, + u8 port_num, + const struct ib_mad *mad, + u16 prev_lid) +{ + struct ib_event event; + + if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || + mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && + mad->mad_hdr.method == IB_MGMT_METHOD_SET) { + if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { + struct ib_port_info *pinfo = + (struct ib_port_info *) ((struct ib_smp *) mad)->data; + u16 lid = be16_to_cpu(pinfo->lid); + + mthca_update_rate(to_mdev(ibdev), port_num); + update_sm_ah(to_mdev(ibdev), port_num, + be16_to_cpu(pinfo->sm_lid), + pinfo->neighbormtu_mastersmsl & 0xf); + + event.device = ibdev; + event.element.port_num = port_num; + + if (pinfo->clientrereg_resv_subnetto & 0x80) { + event.event = IB_EVENT_CLIENT_REREGISTER; + ib_dispatch_event(&event); + } + + if (prev_lid != lid) { + event.event = IB_EVENT_LID_CHANGE; + ib_dispatch_event(&event); + } + } + + if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { + event.device = ibdev; + event.event = IB_EVENT_PKEY_CHANGE; + event.element.port_num = port_num; + ib_dispatch_event(&event); + } + } +} + +static void node_desc_override(struct ib_device *dev, + struct ib_mad *mad) +{ + if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || + mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && + mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && + mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { + mutex_lock(&to_mdev(dev)->cap_mask_mutex); + memcpy(((struct ib_smp *) mad)->data, dev->node_desc, + IB_DEVICE_NODE_DESC_MAX); + mutex_unlock(&to_mdev(dev)->cap_mask_mutex); + } +} + +static void forward_trap(struct mthca_dev *dev, + u8 port_num, + const struct ib_mad *mad) +{ + int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; + struct ib_mad_send_buf *send_buf; + struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; + int ret; + unsigned long flags; + + if (agent) { + send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, + IB_MGMT_MAD_DATA, GFP_ATOMIC, + IB_MGMT_BASE_VERSION); + if (IS_ERR(send_buf)) + return; + /* + * We rely here on the fact that MLX QPs don't use the + * address handle after the send is posted (this is + * wrong following the IB spec strictly, but we know + * it's OK for our devices). + */ + spin_lock_irqsave(&dev->sm_lock, flags); + memcpy(send_buf->mad, mad, sizeof *mad); + if ((send_buf->ah = dev->sm_ah[port_num - 1])) + ret = ib_post_send_mad(send_buf, NULL); + else + ret = -EINVAL; + spin_unlock_irqrestore(&dev->sm_lock, flags); + + if (ret) + ib_free_send_mad(send_buf); + } +} + +int mthca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, + const struct ib_wc *in_wc, const struct ib_grh *in_grh, + const struct ib_mad *in, struct ib_mad *out, + size_t *out_mad_size, u16 *out_mad_pkey_index) +{ + int err; + u16 slid = in_wc ? ib_lid_cpu16(in_wc->slid) : be16_to_cpu(IB_LID_PERMISSIVE); + u16 prev_lid = 0; + struct ib_port_attr pattr; + + /* Forward locally generated traps to the SM */ + if (in->mad_hdr.method == IB_MGMT_METHOD_TRAP && !slid) { + forward_trap(to_mdev(ibdev), port_num, in); + return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; + } + + /* + * Only handle SM gets, sets and trap represses for SM class + * + * Only handle PMA and Mellanox vendor-specific class gets and + * sets for other classes. + */ + if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || + in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { + if (in->mad_hdr.method != IB_MGMT_METHOD_GET && + in->mad_hdr.method != IB_MGMT_METHOD_SET && + in->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) + return IB_MAD_RESULT_SUCCESS; + + /* + * Don't process SMInfo queries or vendor-specific + * MADs -- the SMA can't handle them. + */ + if (in->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || + ((in->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == + IB_SMP_ATTR_VENDOR_MASK)) + return IB_MAD_RESULT_SUCCESS; + } else if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || + in->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 || + in->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) { + if (in->mad_hdr.method != IB_MGMT_METHOD_GET && + in->mad_hdr.method != IB_MGMT_METHOD_SET) + return IB_MAD_RESULT_SUCCESS; + } else + return IB_MAD_RESULT_SUCCESS; + if ((in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || + in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && + in->mad_hdr.method == IB_MGMT_METHOD_SET && + in->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && + !ib_query_port(ibdev, port_num, &pattr)) + prev_lid = ib_lid_cpu16(pattr.lid); + + err = mthca_MAD_IFC(to_mdev(ibdev), mad_flags & IB_MAD_IGNORE_MKEY, + mad_flags & IB_MAD_IGNORE_BKEY, port_num, in_wc, + in_grh, in, out); + if (err == -EBADMSG) + return IB_MAD_RESULT_SUCCESS; + else if (err) { + mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err); + return IB_MAD_RESULT_FAILURE; + } + + if (!out->mad_hdr.status) { + smp_snoop(ibdev, port_num, in, prev_lid); + node_desc_override(ibdev, out); + } + + /* set return bit in status of directed route responses */ + if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) + out->mad_hdr.status |= cpu_to_be16(1 << 15); + + if (in->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) + /* no response for trap repress */ + return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; + + return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; +} + +static void send_handler(struct ib_mad_agent *agent, + struct ib_mad_send_wc *mad_send_wc) +{ + ib_free_send_mad(mad_send_wc->send_buf); +} + +int mthca_create_agents(struct mthca_dev *dev) +{ + struct ib_mad_agent *agent; + int p, q; + int ret; + + spin_lock_init(&dev->sm_lock); + + for (p = 0; p < dev->limits.num_ports; ++p) + for (q = 0; q <= 1; ++q) { + agent = ib_register_mad_agent(&dev->ib_dev, p + 1, + q ? IB_QPT_GSI : IB_QPT_SMI, + NULL, 0, send_handler, + NULL, NULL, 0); + if (IS_ERR(agent)) { + ret = PTR_ERR(agent); + goto err; + } + dev->send_agent[p][q] = agent; + } + + + for (p = 1; p <= dev->limits.num_ports; ++p) { + ret = mthca_update_rate(dev, p); + if (ret) { + mthca_err(dev, "Failed to obtain port %d rate." + " aborting.\n", p); + goto err; + } + } + + return 0; + +err: + for (p = 0; p < dev->limits.num_ports; ++p) + for (q = 0; q <= 1; ++q) + if (dev->send_agent[p][q]) + ib_unregister_mad_agent(dev->send_agent[p][q]); + + return ret; +} + +void mthca_free_agents(struct mthca_dev *dev) +{ + struct ib_mad_agent *agent; + int p, q; + + for (p = 0; p < dev->limits.num_ports; ++p) { + for (q = 0; q <= 1; ++q) { + agent = dev->send_agent[p][q]; + dev->send_agent[p][q] = NULL; + ib_unregister_mad_agent(agent); + } + + if (dev->sm_ah[p]) + rdma_destroy_ah(dev->sm_ah[p], + RDMA_DESTROY_AH_SLEEPABLE); + } +} diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c new file mode 100644 index 000000000..3acd1372c --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_main.c @@ -0,0 +1,1272 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/pci.h> +#include <linux/interrupt.h> +#include <linux/gfp.h> + +#include "mthca_dev.h" +#include "mthca_config_reg.h" +#include "mthca_cmd.h" +#include "mthca_profile.h" +#include "mthca_memfree.h" +#include "mthca_wqe.h" + +MODULE_AUTHOR("Roland Dreier"); +MODULE_DESCRIPTION("Mellanox InfiniBand HCA low-level driver"); +MODULE_LICENSE("Dual BSD/GPL"); + +#ifdef CONFIG_INFINIBAND_MTHCA_DEBUG + +int mthca_debug_level = 0; +module_param_named(debug_level, mthca_debug_level, int, 0644); +MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); + +#endif /* CONFIG_INFINIBAND_MTHCA_DEBUG */ + +#ifdef CONFIG_PCI_MSI + +static int msi_x = 1; +module_param(msi_x, int, 0444); +MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero"); + +#else /* CONFIG_PCI_MSI */ + +#define msi_x (0) + +#endif /* CONFIG_PCI_MSI */ + +static int tune_pci = 0; +module_param(tune_pci, int, 0444); +MODULE_PARM_DESC(tune_pci, "increase PCI burst from the default set by BIOS if nonzero"); + +DEFINE_MUTEX(mthca_device_mutex); + +#define MTHCA_DEFAULT_NUM_QP (1 << 16) +#define MTHCA_DEFAULT_RDB_PER_QP (1 << 2) +#define MTHCA_DEFAULT_NUM_CQ (1 << 16) +#define MTHCA_DEFAULT_NUM_MCG (1 << 13) +#define MTHCA_DEFAULT_NUM_MPT (1 << 17) +#define MTHCA_DEFAULT_NUM_MTT (1 << 20) +#define MTHCA_DEFAULT_NUM_UDAV (1 << 15) +#define MTHCA_DEFAULT_NUM_RESERVED_MTTS (1 << 18) +#define MTHCA_DEFAULT_NUM_UARC_SIZE (1 << 18) + +static struct mthca_profile hca_profile = { + .num_qp = MTHCA_DEFAULT_NUM_QP, + .rdb_per_qp = MTHCA_DEFAULT_RDB_PER_QP, + .num_cq = MTHCA_DEFAULT_NUM_CQ, + .num_mcg = MTHCA_DEFAULT_NUM_MCG, + .num_mpt = MTHCA_DEFAULT_NUM_MPT, + .num_mtt = MTHCA_DEFAULT_NUM_MTT, + .num_udav = MTHCA_DEFAULT_NUM_UDAV, /* Tavor only */ + .fmr_reserved_mtts = MTHCA_DEFAULT_NUM_RESERVED_MTTS, /* Tavor only */ + .uarc_size = MTHCA_DEFAULT_NUM_UARC_SIZE, /* Arbel only */ +}; + +module_param_named(num_qp, hca_profile.num_qp, int, 0444); +MODULE_PARM_DESC(num_qp, "maximum number of QPs per HCA"); + +module_param_named(rdb_per_qp, hca_profile.rdb_per_qp, int, 0444); +MODULE_PARM_DESC(rdb_per_qp, "number of RDB buffers per QP"); + +module_param_named(num_cq, hca_profile.num_cq, int, 0444); +MODULE_PARM_DESC(num_cq, "maximum number of CQs per HCA"); + +module_param_named(num_mcg, hca_profile.num_mcg, int, 0444); +MODULE_PARM_DESC(num_mcg, "maximum number of multicast groups per HCA"); + +module_param_named(num_mpt, hca_profile.num_mpt, int, 0444); +MODULE_PARM_DESC(num_mpt, + "maximum number of memory protection table entries per HCA"); + +module_param_named(num_mtt, hca_profile.num_mtt, int, 0444); +MODULE_PARM_DESC(num_mtt, + "maximum number of memory translation table segments per HCA"); + +module_param_named(num_udav, hca_profile.num_udav, int, 0444); +MODULE_PARM_DESC(num_udav, "maximum number of UD address vectors per HCA"); + +module_param_named(fmr_reserved_mtts, hca_profile.fmr_reserved_mtts, int, 0444); +MODULE_PARM_DESC(fmr_reserved_mtts, + "number of memory translation table segments reserved for FMR"); + +static int log_mtts_per_seg = ilog2(MTHCA_MTT_SEG_SIZE / 8); +module_param_named(log_mtts_per_seg, log_mtts_per_seg, int, 0444); +MODULE_PARM_DESC(log_mtts_per_seg, "Log2 number of MTT entries per segment (1-5)"); + +static char mthca_version[] = + DRV_NAME ": Mellanox InfiniBand HCA driver v" + DRV_VERSION " (" DRV_RELDATE ")\n"; + +static int mthca_tune_pci(struct mthca_dev *mdev) +{ + if (!tune_pci) + return 0; + + /* First try to max out Read Byte Count */ + if (pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX)) { + if (pcix_set_mmrbc(mdev->pdev, pcix_get_max_mmrbc(mdev->pdev))) { + mthca_err(mdev, "Couldn't set PCI-X max read count, " + "aborting.\n"); + return -ENODEV; + } + } else if (!(mdev->mthca_flags & MTHCA_FLAG_PCIE)) + mthca_info(mdev, "No PCI-X capability, not setting RBC.\n"); + + if (pci_is_pcie(mdev->pdev)) { + if (pcie_set_readrq(mdev->pdev, 4096)) { + mthca_err(mdev, "Couldn't write PCI Express read request, " + "aborting.\n"); + return -ENODEV; + } + } else if (mdev->mthca_flags & MTHCA_FLAG_PCIE) + mthca_info(mdev, "No PCI Express capability, " + "not setting Max Read Request Size.\n"); + + return 0; +} + +static int mthca_dev_lim(struct mthca_dev *mdev, struct mthca_dev_lim *dev_lim) +{ + int err; + + mdev->limits.mtt_seg_size = (1 << log_mtts_per_seg) * 8; + err = mthca_QUERY_DEV_LIM(mdev, dev_lim); + if (err) { + mthca_err(mdev, "QUERY_DEV_LIM command returned %d" + ", aborting.\n", err); + return err; + } + if (dev_lim->min_page_sz > PAGE_SIZE) { + mthca_err(mdev, "HCA minimum page size of %d bigger than " + "kernel PAGE_SIZE of %ld, aborting.\n", + dev_lim->min_page_sz, PAGE_SIZE); + return -ENODEV; + } + if (dev_lim->num_ports > MTHCA_MAX_PORTS) { + mthca_err(mdev, "HCA has %d ports, but we only support %d, " + "aborting.\n", + dev_lim->num_ports, MTHCA_MAX_PORTS); + return -ENODEV; + } + + if (dev_lim->uar_size > pci_resource_len(mdev->pdev, 2)) { + mthca_err(mdev, "HCA reported UAR size of 0x%x bigger than " + "PCI resource 2 size of 0x%llx, aborting.\n", + dev_lim->uar_size, + (unsigned long long)pci_resource_len(mdev->pdev, 2)); + return -ENODEV; + } + + mdev->limits.num_ports = dev_lim->num_ports; + mdev->limits.vl_cap = dev_lim->max_vl; + mdev->limits.mtu_cap = dev_lim->max_mtu; + mdev->limits.gid_table_len = dev_lim->max_gids; + mdev->limits.pkey_table_len = dev_lim->max_pkeys; + mdev->limits.local_ca_ack_delay = dev_lim->local_ca_ack_delay; + /* + * Need to allow for worst case send WQE overhead and check + * whether max_desc_sz imposes a lower limit than max_sg; UD + * send has the biggest overhead. + */ + mdev->limits.max_sg = min_t(int, dev_lim->max_sg, + (dev_lim->max_desc_sz - + sizeof (struct mthca_next_seg) - + (mthca_is_memfree(mdev) ? + sizeof (struct mthca_arbel_ud_seg) : + sizeof (struct mthca_tavor_ud_seg))) / + sizeof (struct mthca_data_seg)); + mdev->limits.max_wqes = dev_lim->max_qp_sz; + mdev->limits.max_qp_init_rdma = dev_lim->max_requester_per_qp; + mdev->limits.reserved_qps = dev_lim->reserved_qps; + mdev->limits.max_srq_wqes = dev_lim->max_srq_sz; + mdev->limits.reserved_srqs = dev_lim->reserved_srqs; + mdev->limits.reserved_eecs = dev_lim->reserved_eecs; + mdev->limits.max_desc_sz = dev_lim->max_desc_sz; + mdev->limits.max_srq_sge = mthca_max_srq_sge(mdev); + /* + * Subtract 1 from the limit because we need to allocate a + * spare CQE so the HCA HW can tell the difference between an + * empty CQ and a full CQ. + */ + mdev->limits.max_cqes = dev_lim->max_cq_sz - 1; + mdev->limits.reserved_cqs = dev_lim->reserved_cqs; + mdev->limits.reserved_eqs = dev_lim->reserved_eqs; + mdev->limits.reserved_mtts = dev_lim->reserved_mtts; + mdev->limits.reserved_mrws = dev_lim->reserved_mrws; + mdev->limits.reserved_uars = dev_lim->reserved_uars; + mdev->limits.reserved_pds = dev_lim->reserved_pds; + mdev->limits.port_width_cap = dev_lim->max_port_width; + mdev->limits.page_size_cap = ~(u32) (dev_lim->min_page_sz - 1); + mdev->limits.flags = dev_lim->flags; + /* + * For old FW that doesn't return static rate support, use a + * value of 0x3 (only static rate values of 0 or 1 are handled), + * except on Sinai, where even old FW can handle static rate + * values of 2 and 3. + */ + if (dev_lim->stat_rate_support) + mdev->limits.stat_rate_support = dev_lim->stat_rate_support; + else if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT) + mdev->limits.stat_rate_support = 0xf; + else + mdev->limits.stat_rate_support = 0x3; + + /* IB_DEVICE_RESIZE_MAX_WR not supported by driver. + May be doable since hardware supports it for SRQ. + + IB_DEVICE_N_NOTIFY_CQ is supported by hardware but not by driver. + + IB_DEVICE_SRQ_RESIZE is supported by hardware but SRQ is not + supported by driver. */ + mdev->device_cap_flags = IB_DEVICE_CHANGE_PHY_PORT | + IB_DEVICE_PORT_ACTIVE_EVENT | + IB_DEVICE_SYS_IMAGE_GUID | + IB_DEVICE_RC_RNR_NAK_GEN; + + if (dev_lim->flags & DEV_LIM_FLAG_BAD_PKEY_CNTR) + mdev->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR; + + if (dev_lim->flags & DEV_LIM_FLAG_BAD_QKEY_CNTR) + mdev->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR; + + if (dev_lim->flags & DEV_LIM_FLAG_RAW_MULTI) + mdev->device_cap_flags |= IB_DEVICE_RAW_MULTI; + + if (dev_lim->flags & DEV_LIM_FLAG_AUTO_PATH_MIG) + mdev->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG; + + if (dev_lim->flags & DEV_LIM_FLAG_UD_AV_PORT_ENFORCE) + mdev->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE; + + if (dev_lim->flags & DEV_LIM_FLAG_SRQ) + mdev->mthca_flags |= MTHCA_FLAG_SRQ; + + if (mthca_is_memfree(mdev)) + if (dev_lim->flags & DEV_LIM_FLAG_IPOIB_CSUM) + mdev->device_cap_flags |= IB_DEVICE_UD_IP_CSUM; + + return 0; +} + +static int mthca_init_tavor(struct mthca_dev *mdev) +{ + s64 size; + int err; + struct mthca_dev_lim dev_lim; + struct mthca_profile profile; + struct mthca_init_hca_param init_hca; + + err = mthca_SYS_EN(mdev); + if (err) { + mthca_err(mdev, "SYS_EN command returned %d, aborting.\n", err); + return err; + } + + err = mthca_QUERY_FW(mdev); + if (err) { + mthca_err(mdev, "QUERY_FW command returned %d," + " aborting.\n", err); + goto err_disable; + } + err = mthca_QUERY_DDR(mdev); + if (err) { + mthca_err(mdev, "QUERY_DDR command returned %d, aborting.\n", err); + goto err_disable; + } + + err = mthca_dev_lim(mdev, &dev_lim); + if (err) { + mthca_err(mdev, "QUERY_DEV_LIM command returned %d, aborting.\n", err); + goto err_disable; + } + + profile = hca_profile; + profile.num_uar = dev_lim.uar_size / PAGE_SIZE; + profile.uarc_size = 0; + if (mdev->mthca_flags & MTHCA_FLAG_SRQ) + profile.num_srq = dev_lim.max_srqs; + + size = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca); + if (size < 0) { + err = size; + goto err_disable; + } + + err = mthca_INIT_HCA(mdev, &init_hca); + if (err) { + mthca_err(mdev, "INIT_HCA command returned %d, aborting.\n", err); + goto err_disable; + } + + return 0; + +err_disable: + mthca_SYS_DIS(mdev); + + return err; +} + +static int mthca_load_fw(struct mthca_dev *mdev) +{ + int err; + + /* FIXME: use HCA-attached memory for FW if present */ + + mdev->fw.arbel.fw_icm = + mthca_alloc_icm(mdev, mdev->fw.arbel.fw_pages, + GFP_HIGHUSER | __GFP_NOWARN, 0); + if (!mdev->fw.arbel.fw_icm) { + mthca_err(mdev, "Couldn't allocate FW area, aborting.\n"); + return -ENOMEM; + } + + err = mthca_MAP_FA(mdev, mdev->fw.arbel.fw_icm); + if (err) { + mthca_err(mdev, "MAP_FA command returned %d, aborting.\n", err); + goto err_free; + } + err = mthca_RUN_FW(mdev); + if (err) { + mthca_err(mdev, "RUN_FW command returned %d, aborting.\n", err); + goto err_unmap_fa; + } + + return 0; + +err_unmap_fa: + mthca_UNMAP_FA(mdev); + +err_free: + mthca_free_icm(mdev, mdev->fw.arbel.fw_icm, 0); + return err; +} + +static int mthca_init_icm(struct mthca_dev *mdev, + struct mthca_dev_lim *dev_lim, + struct mthca_init_hca_param *init_hca, + u64 icm_size) +{ + u64 aux_pages = 0; + int err; + + err = mthca_SET_ICM_SIZE(mdev, icm_size, &aux_pages); + if (err) { + mthca_err(mdev, "SET_ICM_SIZE command returned %d, aborting.\n", err); + return err; + } + + mthca_dbg(mdev, "%lld KB of HCA context requires %lld KB aux memory.\n", + (unsigned long long) icm_size >> 10, + (unsigned long long) aux_pages << 2); + + mdev->fw.arbel.aux_icm = mthca_alloc_icm(mdev, aux_pages, + GFP_HIGHUSER | __GFP_NOWARN, 0); + if (!mdev->fw.arbel.aux_icm) { + mthca_err(mdev, "Couldn't allocate aux memory, aborting.\n"); + return -ENOMEM; + } + + err = mthca_MAP_ICM_AUX(mdev, mdev->fw.arbel.aux_icm); + if (err) { + mthca_err(mdev, "MAP_ICM_AUX returned %d, aborting.\n", err); + goto err_free_aux; + } + + err = mthca_map_eq_icm(mdev, init_hca->eqc_base); + if (err) { + mthca_err(mdev, "Failed to map EQ context memory, aborting.\n"); + goto err_unmap_aux; + } + + /* CPU writes to non-reserved MTTs, while HCA might DMA to reserved mtts */ + mdev->limits.reserved_mtts = ALIGN(mdev->limits.reserved_mtts * mdev->limits.mtt_seg_size, + dma_get_cache_alignment()) / mdev->limits.mtt_seg_size; + + mdev->mr_table.mtt_table = mthca_alloc_icm_table(mdev, init_hca->mtt_base, + mdev->limits.mtt_seg_size, + mdev->limits.num_mtt_segs, + mdev->limits.reserved_mtts, + 1, 0); + if (!mdev->mr_table.mtt_table) { + mthca_err(mdev, "Failed to map MTT context memory, aborting.\n"); + err = -ENOMEM; + goto err_unmap_eq; + } + + mdev->mr_table.mpt_table = mthca_alloc_icm_table(mdev, init_hca->mpt_base, + dev_lim->mpt_entry_sz, + mdev->limits.num_mpts, + mdev->limits.reserved_mrws, + 1, 1); + if (!mdev->mr_table.mpt_table) { + mthca_err(mdev, "Failed to map MPT context memory, aborting.\n"); + err = -ENOMEM; + goto err_unmap_mtt; + } + + mdev->qp_table.qp_table = mthca_alloc_icm_table(mdev, init_hca->qpc_base, + dev_lim->qpc_entry_sz, + mdev->limits.num_qps, + mdev->limits.reserved_qps, + 0, 0); + if (!mdev->qp_table.qp_table) { + mthca_err(mdev, "Failed to map QP context memory, aborting.\n"); + err = -ENOMEM; + goto err_unmap_mpt; + } + + mdev->qp_table.eqp_table = mthca_alloc_icm_table(mdev, init_hca->eqpc_base, + dev_lim->eqpc_entry_sz, + mdev->limits.num_qps, + mdev->limits.reserved_qps, + 0, 0); + if (!mdev->qp_table.eqp_table) { + mthca_err(mdev, "Failed to map EQP context memory, aborting.\n"); + err = -ENOMEM; + goto err_unmap_qp; + } + + mdev->qp_table.rdb_table = mthca_alloc_icm_table(mdev, init_hca->rdb_base, + MTHCA_RDB_ENTRY_SIZE, + mdev->limits.num_qps << + mdev->qp_table.rdb_shift, 0, + 0, 0); + if (!mdev->qp_table.rdb_table) { + mthca_err(mdev, "Failed to map RDB context memory, aborting\n"); + err = -ENOMEM; + goto err_unmap_eqp; + } + + mdev->cq_table.table = mthca_alloc_icm_table(mdev, init_hca->cqc_base, + dev_lim->cqc_entry_sz, + mdev->limits.num_cqs, + mdev->limits.reserved_cqs, + 0, 0); + if (!mdev->cq_table.table) { + mthca_err(mdev, "Failed to map CQ context memory, aborting.\n"); + err = -ENOMEM; + goto err_unmap_rdb; + } + + if (mdev->mthca_flags & MTHCA_FLAG_SRQ) { + mdev->srq_table.table = + mthca_alloc_icm_table(mdev, init_hca->srqc_base, + dev_lim->srq_entry_sz, + mdev->limits.num_srqs, + mdev->limits.reserved_srqs, + 0, 0); + if (!mdev->srq_table.table) { + mthca_err(mdev, "Failed to map SRQ context memory, " + "aborting.\n"); + err = -ENOMEM; + goto err_unmap_cq; + } + } + + /* + * It's not strictly required, but for simplicity just map the + * whole multicast group table now. The table isn't very big + * and it's a lot easier than trying to track ref counts. + */ + mdev->mcg_table.table = mthca_alloc_icm_table(mdev, init_hca->mc_base, + MTHCA_MGM_ENTRY_SIZE, + mdev->limits.num_mgms + + mdev->limits.num_amgms, + mdev->limits.num_mgms + + mdev->limits.num_amgms, + 0, 0); + if (!mdev->mcg_table.table) { + mthca_err(mdev, "Failed to map MCG context memory, aborting.\n"); + err = -ENOMEM; + goto err_unmap_srq; + } + + return 0; + +err_unmap_srq: + if (mdev->mthca_flags & MTHCA_FLAG_SRQ) + mthca_free_icm_table(mdev, mdev->srq_table.table); + +err_unmap_cq: + mthca_free_icm_table(mdev, mdev->cq_table.table); + +err_unmap_rdb: + mthca_free_icm_table(mdev, mdev->qp_table.rdb_table); + +err_unmap_eqp: + mthca_free_icm_table(mdev, mdev->qp_table.eqp_table); + +err_unmap_qp: + mthca_free_icm_table(mdev, mdev->qp_table.qp_table); + +err_unmap_mpt: + mthca_free_icm_table(mdev, mdev->mr_table.mpt_table); + +err_unmap_mtt: + mthca_free_icm_table(mdev, mdev->mr_table.mtt_table); + +err_unmap_eq: + mthca_unmap_eq_icm(mdev); + +err_unmap_aux: + mthca_UNMAP_ICM_AUX(mdev); + +err_free_aux: + mthca_free_icm(mdev, mdev->fw.arbel.aux_icm, 0); + + return err; +} + +static void mthca_free_icms(struct mthca_dev *mdev) +{ + + mthca_free_icm_table(mdev, mdev->mcg_table.table); + if (mdev->mthca_flags & MTHCA_FLAG_SRQ) + mthca_free_icm_table(mdev, mdev->srq_table.table); + mthca_free_icm_table(mdev, mdev->cq_table.table); + mthca_free_icm_table(mdev, mdev->qp_table.rdb_table); + mthca_free_icm_table(mdev, mdev->qp_table.eqp_table); + mthca_free_icm_table(mdev, mdev->qp_table.qp_table); + mthca_free_icm_table(mdev, mdev->mr_table.mpt_table); + mthca_free_icm_table(mdev, mdev->mr_table.mtt_table); + mthca_unmap_eq_icm(mdev); + + mthca_UNMAP_ICM_AUX(mdev); + mthca_free_icm(mdev, mdev->fw.arbel.aux_icm, 0); +} + +static int mthca_init_arbel(struct mthca_dev *mdev) +{ + struct mthca_dev_lim dev_lim; + struct mthca_profile profile; + struct mthca_init_hca_param init_hca; + s64 icm_size; + int err; + + err = mthca_QUERY_FW(mdev); + if (err) { + mthca_err(mdev, "QUERY_FW command failed %d, aborting.\n", err); + return err; + } + + err = mthca_ENABLE_LAM(mdev); + if (err == -EAGAIN) { + mthca_dbg(mdev, "No HCA-attached memory (running in MemFree mode)\n"); + mdev->mthca_flags |= MTHCA_FLAG_NO_LAM; + } else if (err) { + mthca_err(mdev, "ENABLE_LAM returned %d, aborting.\n", err); + return err; + } + + err = mthca_load_fw(mdev); + if (err) { + mthca_err(mdev, "Loading FW returned %d, aborting.\n", err); + goto err_disable; + } + + err = mthca_dev_lim(mdev, &dev_lim); + if (err) { + mthca_err(mdev, "QUERY_DEV_LIM returned %d, aborting.\n", err); + goto err_stop_fw; + } + + profile = hca_profile; + profile.num_uar = dev_lim.uar_size / PAGE_SIZE; + profile.num_udav = 0; + if (mdev->mthca_flags & MTHCA_FLAG_SRQ) + profile.num_srq = dev_lim.max_srqs; + + icm_size = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca); + if (icm_size < 0) { + err = icm_size; + goto err_stop_fw; + } + + err = mthca_init_icm(mdev, &dev_lim, &init_hca, icm_size); + if (err) + goto err_stop_fw; + + err = mthca_INIT_HCA(mdev, &init_hca); + if (err) { + mthca_err(mdev, "INIT_HCA command returned %d, aborting.\n", err); + goto err_free_icm; + } + + return 0; + +err_free_icm: + mthca_free_icms(mdev); + +err_stop_fw: + mthca_UNMAP_FA(mdev); + mthca_free_icm(mdev, mdev->fw.arbel.fw_icm, 0); + +err_disable: + if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM)) + mthca_DISABLE_LAM(mdev); + + return err; +} + +static void mthca_close_hca(struct mthca_dev *mdev) +{ + mthca_CLOSE_HCA(mdev, 0); + + if (mthca_is_memfree(mdev)) { + mthca_free_icms(mdev); + + mthca_UNMAP_FA(mdev); + mthca_free_icm(mdev, mdev->fw.arbel.fw_icm, 0); + + if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM)) + mthca_DISABLE_LAM(mdev); + } else + mthca_SYS_DIS(mdev); +} + +static int mthca_init_hca(struct mthca_dev *mdev) +{ + int err; + struct mthca_adapter adapter; + + if (mthca_is_memfree(mdev)) + err = mthca_init_arbel(mdev); + else + err = mthca_init_tavor(mdev); + + if (err) + return err; + + err = mthca_QUERY_ADAPTER(mdev, &adapter); + if (err) { + mthca_err(mdev, "QUERY_ADAPTER command returned %d, aborting.\n", err); + goto err_close; + } + + mdev->eq_table.inta_pin = adapter.inta_pin; + if (!mthca_is_memfree(mdev)) + mdev->rev_id = adapter.revision_id; + memcpy(mdev->board_id, adapter.board_id, sizeof mdev->board_id); + + return 0; + +err_close: + mthca_close_hca(mdev); + return err; +} + +static int mthca_setup_hca(struct mthca_dev *dev) +{ + int err; + + MTHCA_INIT_DOORBELL_LOCK(&dev->doorbell_lock); + + err = mthca_init_uar_table(dev); + if (err) { + mthca_err(dev, "Failed to initialize " + "user access region table, aborting.\n"); + return err; + } + + err = mthca_uar_alloc(dev, &dev->driver_uar); + if (err) { + mthca_err(dev, "Failed to allocate driver access region, " + "aborting.\n"); + goto err_uar_table_free; + } + + dev->kar = ioremap((phys_addr_t) dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE); + if (!dev->kar) { + mthca_err(dev, "Couldn't map kernel access region, " + "aborting.\n"); + err = -ENOMEM; + goto err_uar_free; + } + + err = mthca_init_pd_table(dev); + if (err) { + mthca_err(dev, "Failed to initialize " + "protection domain table, aborting.\n"); + goto err_kar_unmap; + } + + err = mthca_init_mr_table(dev); + if (err) { + mthca_err(dev, "Failed to initialize " + "memory region table, aborting.\n"); + goto err_pd_table_free; + } + + err = mthca_pd_alloc(dev, 1, &dev->driver_pd); + if (err) { + mthca_err(dev, "Failed to create driver PD, " + "aborting.\n"); + goto err_mr_table_free; + } + + err = mthca_init_eq_table(dev); + if (err) { + mthca_err(dev, "Failed to initialize " + "event queue table, aborting.\n"); + goto err_pd_free; + } + + err = mthca_cmd_use_events(dev); + if (err) { + mthca_err(dev, "Failed to switch to event-driven " + "firmware commands, aborting.\n"); + goto err_eq_table_free; + } + + err = mthca_NOP(dev); + if (err) { + if (dev->mthca_flags & MTHCA_FLAG_MSI_X) { + mthca_warn(dev, "NOP command failed to generate interrupt " + "(IRQ %d).\n", + dev->eq_table.eq[MTHCA_EQ_CMD].msi_x_vector); + mthca_warn(dev, "Trying again with MSI-X disabled.\n"); + } else { + mthca_err(dev, "NOP command failed to generate interrupt " + "(IRQ %d), aborting.\n", + dev->pdev->irq); + mthca_err(dev, "BIOS or ACPI interrupt routing problem?\n"); + } + + goto err_cmd_poll; + } + + mthca_dbg(dev, "NOP command IRQ test passed\n"); + + err = mthca_init_cq_table(dev); + if (err) { + mthca_err(dev, "Failed to initialize " + "completion queue table, aborting.\n"); + goto err_cmd_poll; + } + + err = mthca_init_srq_table(dev); + if (err) { + mthca_err(dev, "Failed to initialize " + "shared receive queue table, aborting.\n"); + goto err_cq_table_free; + } + + err = mthca_init_qp_table(dev); + if (err) { + mthca_err(dev, "Failed to initialize " + "queue pair table, aborting.\n"); + goto err_srq_table_free; + } + + err = mthca_init_av_table(dev); + if (err) { + mthca_err(dev, "Failed to initialize " + "address vector table, aborting.\n"); + goto err_qp_table_free; + } + + err = mthca_init_mcg_table(dev); + if (err) { + mthca_err(dev, "Failed to initialize " + "multicast group table, aborting.\n"); + goto err_av_table_free; + } + + return 0; + +err_av_table_free: + mthca_cleanup_av_table(dev); + +err_qp_table_free: + mthca_cleanup_qp_table(dev); + +err_srq_table_free: + mthca_cleanup_srq_table(dev); + +err_cq_table_free: + mthca_cleanup_cq_table(dev); + +err_cmd_poll: + mthca_cmd_use_polling(dev); + +err_eq_table_free: + mthca_cleanup_eq_table(dev); + +err_pd_free: + mthca_pd_free(dev, &dev->driver_pd); + +err_mr_table_free: + mthca_cleanup_mr_table(dev); + +err_pd_table_free: + mthca_cleanup_pd_table(dev); + +err_kar_unmap: + iounmap(dev->kar); + +err_uar_free: + mthca_uar_free(dev, &dev->driver_uar); + +err_uar_table_free: + mthca_cleanup_uar_table(dev); + return err; +} + +static int mthca_enable_msi_x(struct mthca_dev *mdev) +{ + int err; + + err = pci_alloc_irq_vectors(mdev->pdev, 3, 3, PCI_IRQ_MSIX); + if (err < 0) + return err; + + mdev->eq_table.eq[MTHCA_EQ_COMP ].msi_x_vector = + pci_irq_vector(mdev->pdev, 0); + mdev->eq_table.eq[MTHCA_EQ_ASYNC].msi_x_vector = + pci_irq_vector(mdev->pdev, 1); + mdev->eq_table.eq[MTHCA_EQ_CMD ].msi_x_vector = + pci_irq_vector(mdev->pdev, 2); + + return 0; +} + +/* Types of supported HCA */ +enum { + TAVOR, /* MT23108 */ + ARBEL_COMPAT, /* MT25208 in Tavor compat mode */ + ARBEL_NATIVE, /* MT25208 with extended features */ + SINAI /* MT25204 */ +}; + +#define MTHCA_FW_VER(major, minor, subminor) \ + (((u64) (major) << 32) | ((u64) (minor) << 16) | (u64) (subminor)) + +static struct { + u64 latest_fw; + u32 flags; +} mthca_hca_table[] = { + [TAVOR] = { .latest_fw = MTHCA_FW_VER(3, 5, 0), + .flags = 0 }, + [ARBEL_COMPAT] = { .latest_fw = MTHCA_FW_VER(4, 8, 200), + .flags = MTHCA_FLAG_PCIE }, + [ARBEL_NATIVE] = { .latest_fw = MTHCA_FW_VER(5, 3, 0), + .flags = MTHCA_FLAG_MEMFREE | + MTHCA_FLAG_PCIE }, + [SINAI] = { .latest_fw = MTHCA_FW_VER(1, 2, 0), + .flags = MTHCA_FLAG_MEMFREE | + MTHCA_FLAG_PCIE | + MTHCA_FLAG_SINAI_OPT } +}; + +static int __mthca_init_one(struct pci_dev *pdev, int hca_type) +{ + int ddr_hidden = 0; + int err; + struct mthca_dev *mdev; + + printk(KERN_INFO PFX "Initializing %s\n", + pci_name(pdev)); + + err = pci_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "Cannot enable PCI device, " + "aborting.\n"); + return err; + } + + /* + * Check for BARs. We expect 0: 1MB, 2: 8MB, 4: DDR (may not + * be present) + */ + if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || + pci_resource_len(pdev, 0) != 1 << 20) { + dev_err(&pdev->dev, "Missing DCS, aborting.\n"); + err = -ENODEV; + goto err_disable_pdev; + } + if (!(pci_resource_flags(pdev, 2) & IORESOURCE_MEM)) { + dev_err(&pdev->dev, "Missing UAR, aborting.\n"); + err = -ENODEV; + goto err_disable_pdev; + } + if (!(pci_resource_flags(pdev, 4) & IORESOURCE_MEM)) + ddr_hidden = 1; + + err = pci_request_regions(pdev, DRV_NAME); + if (err) { + dev_err(&pdev->dev, "Cannot obtain PCI resources, " + "aborting.\n"); + goto err_disable_pdev; + } + + pci_set_master(pdev); + + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask.\n"); + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) { + dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n"); + goto err_free_res; + } + } + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + dev_warn(&pdev->dev, "Warning: couldn't set 64-bit " + "consistent PCI DMA mask.\n"); + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) { + dev_err(&pdev->dev, "Can't set consistent PCI DMA mask, " + "aborting.\n"); + goto err_free_res; + } + } + + /* We can handle large RDMA requests, so allow larger segments. */ + dma_set_max_seg_size(&pdev->dev, 1024 * 1024 * 1024); + + mdev = ib_alloc_device(mthca_dev, ib_dev); + if (!mdev) { + dev_err(&pdev->dev, "Device struct alloc failed, " + "aborting.\n"); + err = -ENOMEM; + goto err_free_res; + } + + mdev->pdev = pdev; + + mdev->mthca_flags = mthca_hca_table[hca_type].flags; + if (ddr_hidden) + mdev->mthca_flags |= MTHCA_FLAG_DDR_HIDDEN; + + /* + * Now reset the HCA before we touch the PCI capabilities or + * attempt a firmware command, since a boot ROM may have left + * the HCA in an undefined state. + */ + err = mthca_reset(mdev); + if (err) { + mthca_err(mdev, "Failed to reset HCA, aborting.\n"); + goto err_free_dev; + } + + err = mthca_cmd_init(mdev); + if (err) { + mthca_err(mdev, "Failed to init command interface, aborting.\n"); + goto err_free_dev; + } + + err = mthca_tune_pci(mdev); + if (err) + goto err_cmd; + + err = mthca_init_hca(mdev); + if (err) + goto err_cmd; + + if (mdev->fw_ver < mthca_hca_table[hca_type].latest_fw) { + mthca_warn(mdev, "HCA FW version %d.%d.%03d is old (%d.%d.%03d is current).\n", + (int) (mdev->fw_ver >> 32), (int) (mdev->fw_ver >> 16) & 0xffff, + (int) (mdev->fw_ver & 0xffff), + (int) (mthca_hca_table[hca_type].latest_fw >> 32), + (int) (mthca_hca_table[hca_type].latest_fw >> 16) & 0xffff, + (int) (mthca_hca_table[hca_type].latest_fw & 0xffff)); + mthca_warn(mdev, "If you have problems, try updating your HCA FW.\n"); + } + + if (msi_x && !mthca_enable_msi_x(mdev)) + mdev->mthca_flags |= MTHCA_FLAG_MSI_X; + + err = mthca_setup_hca(mdev); + if (err == -EBUSY && (mdev->mthca_flags & MTHCA_FLAG_MSI_X)) { + pci_free_irq_vectors(pdev); + mdev->mthca_flags &= ~MTHCA_FLAG_MSI_X; + + err = mthca_setup_hca(mdev); + } + + if (err) + goto err_close; + + err = mthca_register_device(mdev); + if (err) + goto err_cleanup; + + err = mthca_create_agents(mdev); + if (err) + goto err_unregister; + + pci_set_drvdata(pdev, mdev); + mdev->hca_type = hca_type; + + mdev->active = true; + + return 0; + +err_unregister: + mthca_unregister_device(mdev); + +err_cleanup: + mthca_cleanup_mcg_table(mdev); + mthca_cleanup_av_table(mdev); + mthca_cleanup_qp_table(mdev); + mthca_cleanup_srq_table(mdev); + mthca_cleanup_cq_table(mdev); + mthca_cmd_use_polling(mdev); + mthca_cleanup_eq_table(mdev); + + mthca_pd_free(mdev, &mdev->driver_pd); + + mthca_cleanup_mr_table(mdev); + mthca_cleanup_pd_table(mdev); + mthca_cleanup_uar_table(mdev); + +err_close: + if (mdev->mthca_flags & MTHCA_FLAG_MSI_X) + pci_free_irq_vectors(pdev); + + mthca_close_hca(mdev); + +err_cmd: + mthca_cmd_cleanup(mdev); + +err_free_dev: + ib_dealloc_device(&mdev->ib_dev); + +err_free_res: + pci_release_regions(pdev); + +err_disable_pdev: + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + return err; +} + +static void __mthca_remove_one(struct pci_dev *pdev) +{ + struct mthca_dev *mdev = pci_get_drvdata(pdev); + int p; + + if (mdev) { + mthca_free_agents(mdev); + mthca_unregister_device(mdev); + + for (p = 1; p <= mdev->limits.num_ports; ++p) + mthca_CLOSE_IB(mdev, p); + + mthca_cleanup_mcg_table(mdev); + mthca_cleanup_av_table(mdev); + mthca_cleanup_qp_table(mdev); + mthca_cleanup_srq_table(mdev); + mthca_cleanup_cq_table(mdev); + mthca_cmd_use_polling(mdev); + mthca_cleanup_eq_table(mdev); + + mthca_pd_free(mdev, &mdev->driver_pd); + + mthca_cleanup_mr_table(mdev); + mthca_cleanup_pd_table(mdev); + + iounmap(mdev->kar); + mthca_uar_free(mdev, &mdev->driver_uar); + mthca_cleanup_uar_table(mdev); + mthca_close_hca(mdev); + mthca_cmd_cleanup(mdev); + + if (mdev->mthca_flags & MTHCA_FLAG_MSI_X) + pci_free_irq_vectors(pdev); + + ib_dealloc_device(&mdev->ib_dev); + pci_release_regions(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + } +} + +int __mthca_restart_one(struct pci_dev *pdev) +{ + struct mthca_dev *mdev; + int hca_type; + + mdev = pci_get_drvdata(pdev); + if (!mdev) + return -ENODEV; + hca_type = mdev->hca_type; + __mthca_remove_one(pdev); + return __mthca_init_one(pdev, hca_type); +} + +static int mthca_init_one(struct pci_dev *pdev, const struct pci_device_id *id) +{ + int ret; + + mutex_lock(&mthca_device_mutex); + + printk_once(KERN_INFO "%s", mthca_version); + + if (id->driver_data >= ARRAY_SIZE(mthca_hca_table)) { + printk(KERN_ERR PFX "%s has invalid driver data %lx\n", + pci_name(pdev), id->driver_data); + mutex_unlock(&mthca_device_mutex); + return -ENODEV; + } + + ret = __mthca_init_one(pdev, id->driver_data); + + mutex_unlock(&mthca_device_mutex); + + return ret; +} + +static void mthca_remove_one(struct pci_dev *pdev) +{ + mutex_lock(&mthca_device_mutex); + __mthca_remove_one(pdev); + mutex_unlock(&mthca_device_mutex); +} + +static const struct pci_device_id mthca_pci_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR), + .driver_data = TAVOR }, + { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_TAVOR), + .driver_data = TAVOR }, + { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT), + .driver_data = ARBEL_COMPAT }, + { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT), + .driver_data = ARBEL_COMPAT }, + { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL), + .driver_data = ARBEL_NATIVE }, + { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL), + .driver_data = ARBEL_NATIVE }, + { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI), + .driver_data = SINAI }, + { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI), + .driver_data = SINAI }, + { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI_OLD), + .driver_data = SINAI }, + { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI_OLD), + .driver_data = SINAI }, + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, mthca_pci_table); + +static struct pci_driver mthca_driver = { + .name = DRV_NAME, + .id_table = mthca_pci_table, + .probe = mthca_init_one, + .remove = mthca_remove_one, +}; + +static void __init __mthca_check_profile_val(const char *name, int *pval, + int pval_default) +{ + /* value must be positive and power of 2 */ + int old_pval = *pval; + + if (old_pval <= 0) + *pval = pval_default; + else + *pval = roundup_pow_of_two(old_pval); + + if (old_pval != *pval) { + printk(KERN_WARNING PFX "Invalid value %d for %s in module parameter.\n", + old_pval, name); + printk(KERN_WARNING PFX "Corrected %s to %d.\n", name, *pval); + } +} + +#define mthca_check_profile_val(name, default) \ + __mthca_check_profile_val(#name, &hca_profile.name, default) + +static void __init mthca_validate_profile(void) +{ + mthca_check_profile_val(num_qp, MTHCA_DEFAULT_NUM_QP); + mthca_check_profile_val(rdb_per_qp, MTHCA_DEFAULT_RDB_PER_QP); + mthca_check_profile_val(num_cq, MTHCA_DEFAULT_NUM_CQ); + mthca_check_profile_val(num_mcg, MTHCA_DEFAULT_NUM_MCG); + mthca_check_profile_val(num_mpt, MTHCA_DEFAULT_NUM_MPT); + mthca_check_profile_val(num_mtt, MTHCA_DEFAULT_NUM_MTT); + mthca_check_profile_val(num_udav, MTHCA_DEFAULT_NUM_UDAV); + mthca_check_profile_val(fmr_reserved_mtts, MTHCA_DEFAULT_NUM_RESERVED_MTTS); + + if (hca_profile.fmr_reserved_mtts >= hca_profile.num_mtt) { + printk(KERN_WARNING PFX "Invalid fmr_reserved_mtts module parameter %d.\n", + hca_profile.fmr_reserved_mtts); + printk(KERN_WARNING PFX "(Must be smaller than num_mtt %d)\n", + hca_profile.num_mtt); + hca_profile.fmr_reserved_mtts = hca_profile.num_mtt / 2; + printk(KERN_WARNING PFX "Corrected fmr_reserved_mtts to %d.\n", + hca_profile.fmr_reserved_mtts); + } + + if ((log_mtts_per_seg < 1) || (log_mtts_per_seg > 5)) { + printk(KERN_WARNING PFX "bad log_mtts_per_seg (%d). Using default - %d\n", + log_mtts_per_seg, ilog2(MTHCA_MTT_SEG_SIZE / 8)); + log_mtts_per_seg = ilog2(MTHCA_MTT_SEG_SIZE / 8); + } +} + +static int __init mthca_init(void) +{ + int ret; + + mthca_validate_profile(); + + ret = mthca_catas_init(); + if (ret) + return ret; + + ret = pci_register_driver(&mthca_driver); + if (ret < 0) { + mthca_catas_cleanup(); + return ret; + } + + return 0; +} + +static void __exit mthca_cleanup(void) +{ + pci_unregister_driver(&mthca_driver); + mthca_catas_cleanup(); +} + +module_init(mthca_init); +module_exit(mthca_cleanup); diff --git a/drivers/infiniband/hw/mthca/mthca_mcg.c b/drivers/infiniband/hw/mthca/mthca_mcg.c new file mode 100644 index 000000000..6304ae8f4 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_mcg.c @@ -0,0 +1,335 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/string.h> +#include <linux/gfp.h> + +#include "mthca_dev.h" +#include "mthca_cmd.h" + +struct mthca_mgm { + __be32 next_gid_index; + u32 reserved[3]; + u8 gid[16]; + __be32 qp[MTHCA_QP_PER_MGM]; +}; + +static const u8 zero_gid[16]; /* automatically initialized to 0 */ + +/* + * Caller must hold MCG table semaphore. gid and mgm parameters must + * be properly aligned for command interface. + * + * Returns 0 unless a firmware command error occurs. + * + * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1 + * and *mgm holds MGM entry. + * + * if GID is found in AMGM, *index = index in AMGM, *prev = index of + * previous entry in hash chain and *mgm holds AMGM entry. + * + * If no AMGM exists for given gid, *index = -1, *prev = index of last + * entry in hash chain and *mgm holds end of hash chain. + */ +static int find_mgm(struct mthca_dev *dev, + u8 *gid, struct mthca_mailbox *mgm_mailbox, + u16 *hash, int *prev, int *index) +{ + struct mthca_mailbox *mailbox; + struct mthca_mgm *mgm = mgm_mailbox->buf; + u8 *mgid; + int err; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return -ENOMEM; + mgid = mailbox->buf; + + memcpy(mgid, gid, 16); + + err = mthca_MGID_HASH(dev, mailbox, hash); + if (err) { + mthca_err(dev, "MGID_HASH failed (%d)\n", err); + goto out; + } + + if (0) + mthca_dbg(dev, "Hash for %pI6 is %04x\n", gid, *hash); + + *index = *hash; + *prev = -1; + + do { + err = mthca_READ_MGM(dev, *index, mgm_mailbox); + if (err) { + mthca_err(dev, "READ_MGM failed (%d)\n", err); + goto out; + } + + if (!memcmp(mgm->gid, zero_gid, 16)) { + if (*index != *hash) { + mthca_err(dev, "Found zero MGID in AMGM.\n"); + err = -EINVAL; + } + goto out; + } + + if (!memcmp(mgm->gid, gid, 16)) + goto out; + + *prev = *index; + *index = be32_to_cpu(mgm->next_gid_index) >> 6; + } while (*index); + + *index = -1; + + out: + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) +{ + struct mthca_dev *dev = to_mdev(ibqp->device); + struct mthca_mailbox *mailbox; + struct mthca_mgm *mgm; + u16 hash; + int index, prev; + int link = 0; + int i; + int err; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + mgm = mailbox->buf; + + mutex_lock(&dev->mcg_table.mutex); + + err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index); + if (err) + goto out; + + if (index != -1) { + if (!memcmp(mgm->gid, zero_gid, 16)) + memcpy(mgm->gid, gid->raw, 16); + } else { + link = 1; + + index = mthca_alloc(&dev->mcg_table.alloc); + if (index == -1) { + mthca_err(dev, "No AMGM entries left\n"); + err = -ENOMEM; + goto out; + } + + err = mthca_READ_MGM(dev, index, mailbox); + if (err) { + mthca_err(dev, "READ_MGM failed (%d)\n", err); + goto out; + } + memset(mgm, 0, sizeof *mgm); + memcpy(mgm->gid, gid->raw, 16); + } + + for (i = 0; i < MTHCA_QP_PER_MGM; ++i) + if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31))) { + mthca_dbg(dev, "QP %06x already a member of MGM\n", + ibqp->qp_num); + err = 0; + goto out; + } else if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) { + mgm->qp[i] = cpu_to_be32(ibqp->qp_num | (1 << 31)); + break; + } + + if (i == MTHCA_QP_PER_MGM) { + mthca_err(dev, "MGM at index %x is full.\n", index); + err = -ENOMEM; + goto out; + } + + err = mthca_WRITE_MGM(dev, index, mailbox); + if (err) { + mthca_err(dev, "WRITE_MGM failed %d\n", err); + err = -EINVAL; + goto out; + } + + if (!link) + goto out; + + err = mthca_READ_MGM(dev, prev, mailbox); + if (err) { + mthca_err(dev, "READ_MGM failed %d\n", err); + goto out; + } + + mgm->next_gid_index = cpu_to_be32(index << 6); + + err = mthca_WRITE_MGM(dev, prev, mailbox); + if (err) + mthca_err(dev, "WRITE_MGM returned %d\n", err); + + out: + if (err && link && index != -1) { + BUG_ON(index < dev->limits.num_mgms); + mthca_free(&dev->mcg_table.alloc, index); + } + mutex_unlock(&dev->mcg_table.mutex); + + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) +{ + struct mthca_dev *dev = to_mdev(ibqp->device); + struct mthca_mailbox *mailbox; + struct mthca_mgm *mgm; + u16 hash; + int prev, index; + int i, loc; + int err; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + mgm = mailbox->buf; + + mutex_lock(&dev->mcg_table.mutex); + + err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index); + if (err) + goto out; + + if (index == -1) { + mthca_err(dev, "MGID %pI6 not found\n", gid->raw); + err = -EINVAL; + goto out; + } + + for (loc = -1, i = 0; i < MTHCA_QP_PER_MGM; ++i) { + if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31))) + loc = i; + if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) + break; + } + + if (loc == -1) { + mthca_err(dev, "QP %06x not found in MGM\n", ibqp->qp_num); + err = -EINVAL; + goto out; + } + + mgm->qp[loc] = mgm->qp[i - 1]; + mgm->qp[i - 1] = 0; + + err = mthca_WRITE_MGM(dev, index, mailbox); + if (err) { + mthca_err(dev, "WRITE_MGM returned %d\n", err); + goto out; + } + + if (i != 1) + goto out; + + if (prev == -1) { + /* Remove entry from MGM */ + int amgm_index_to_free = be32_to_cpu(mgm->next_gid_index) >> 6; + if (amgm_index_to_free) { + err = mthca_READ_MGM(dev, amgm_index_to_free, + mailbox); + if (err) { + mthca_err(dev, "READ_MGM returned %d\n", err); + goto out; + } + } else + memset(mgm->gid, 0, 16); + + err = mthca_WRITE_MGM(dev, index, mailbox); + if (err) { + mthca_err(dev, "WRITE_MGM returned %d\n", err); + goto out; + } + if (amgm_index_to_free) { + BUG_ON(amgm_index_to_free < dev->limits.num_mgms); + mthca_free(&dev->mcg_table.alloc, amgm_index_to_free); + } + } else { + /* Remove entry from AMGM */ + int curr_next_index = be32_to_cpu(mgm->next_gid_index) >> 6; + err = mthca_READ_MGM(dev, prev, mailbox); + if (err) { + mthca_err(dev, "READ_MGM returned %d\n", err); + goto out; + } + + mgm->next_gid_index = cpu_to_be32(curr_next_index << 6); + + err = mthca_WRITE_MGM(dev, prev, mailbox); + if (err) { + mthca_err(dev, "WRITE_MGM returned %d\n", err); + goto out; + } + BUG_ON(index < dev->limits.num_mgms); + mthca_free(&dev->mcg_table.alloc, index); + } + + out: + mutex_unlock(&dev->mcg_table.mutex); + + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_init_mcg_table(struct mthca_dev *dev) +{ + int err; + int table_size = dev->limits.num_mgms + dev->limits.num_amgms; + + err = mthca_alloc_init(&dev->mcg_table.alloc, + table_size, + table_size - 1, + dev->limits.num_mgms); + if (err) + return err; + + mutex_init(&dev->mcg_table.mutex); + + return 0; +} + +void mthca_cleanup_mcg_table(struct mthca_dev *dev) +{ + mthca_alloc_cleanup(&dev->mcg_table.alloc); +} diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c new file mode 100644 index 000000000..fa808582b --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_memfree.c @@ -0,0 +1,760 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Cisco Systems. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/mm.h> +#include <linux/scatterlist.h> +#include <linux/sched.h> +#include <linux/slab.h> + +#include <asm/page.h> + +#include "mthca_memfree.h" +#include "mthca_dev.h" +#include "mthca_cmd.h" + +/* + * We allocate in as big chunks as we can, up to a maximum of 256 KB + * per chunk. + */ +enum { + MTHCA_ICM_ALLOC_SIZE = 1 << 18, + MTHCA_TABLE_CHUNK_SIZE = 1 << 18 +}; + +struct mthca_user_db_table { + struct mutex mutex; + struct { + u64 uvirt; + struct scatterlist mem; + int refcount; + } page[]; +}; + +static void mthca_free_icm_pages(struct mthca_dev *dev, struct mthca_icm_chunk *chunk) +{ + int i; + + if (chunk->nsg > 0) + pci_unmap_sg(dev->pdev, chunk->mem, chunk->npages, + PCI_DMA_BIDIRECTIONAL); + + for (i = 0; i < chunk->npages; ++i) + __free_pages(sg_page(&chunk->mem[i]), + get_order(chunk->mem[i].length)); +} + +static void mthca_free_icm_coherent(struct mthca_dev *dev, struct mthca_icm_chunk *chunk) +{ + int i; + + for (i = 0; i < chunk->npages; ++i) { + dma_free_coherent(&dev->pdev->dev, chunk->mem[i].length, + lowmem_page_address(sg_page(&chunk->mem[i])), + sg_dma_address(&chunk->mem[i])); + } +} + +void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent) +{ + struct mthca_icm_chunk *chunk, *tmp; + + if (!icm) + return; + + list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) { + if (coherent) + mthca_free_icm_coherent(dev, chunk); + else + mthca_free_icm_pages(dev, chunk); + + kfree(chunk); + } + + kfree(icm); +} + +static int mthca_alloc_icm_pages(struct scatterlist *mem, int order, gfp_t gfp_mask) +{ + struct page *page; + + /* + * Use __GFP_ZERO because buggy firmware assumes ICM pages are + * cleared, and subtle failures are seen if they aren't. + */ + page = alloc_pages(gfp_mask | __GFP_ZERO, order); + if (!page) + return -ENOMEM; + + sg_set_page(mem, page, PAGE_SIZE << order, 0); + return 0; +} + +static int mthca_alloc_icm_coherent(struct device *dev, struct scatterlist *mem, + int order, gfp_t gfp_mask) +{ + void *buf = dma_alloc_coherent(dev, PAGE_SIZE << order, &sg_dma_address(mem), + gfp_mask); + if (!buf) + return -ENOMEM; + + sg_set_buf(mem, buf, PAGE_SIZE << order); + BUG_ON(mem->offset); + sg_dma_len(mem) = PAGE_SIZE << order; + return 0; +} + +struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages, + gfp_t gfp_mask, int coherent) +{ + struct mthca_icm *icm; + struct mthca_icm_chunk *chunk = NULL; + int cur_order; + int ret; + + /* We use sg_set_buf for coherent allocs, which assumes low memory */ + BUG_ON(coherent && (gfp_mask & __GFP_HIGHMEM)); + + icm = kmalloc(sizeof *icm, gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN)); + if (!icm) + return icm; + + icm->refcount = 0; + INIT_LIST_HEAD(&icm->chunk_list); + + cur_order = get_order(MTHCA_ICM_ALLOC_SIZE); + + while (npages > 0) { + if (!chunk) { + chunk = kmalloc(sizeof *chunk, + gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN)); + if (!chunk) + goto fail; + + sg_init_table(chunk->mem, MTHCA_ICM_CHUNK_LEN); + chunk->npages = 0; + chunk->nsg = 0; + list_add_tail(&chunk->list, &icm->chunk_list); + } + + while (1 << cur_order > npages) + --cur_order; + + if (coherent) + ret = mthca_alloc_icm_coherent(&dev->pdev->dev, + &chunk->mem[chunk->npages], + cur_order, gfp_mask); + else + ret = mthca_alloc_icm_pages(&chunk->mem[chunk->npages], + cur_order, gfp_mask); + + if (!ret) { + ++chunk->npages; + + if (coherent) + ++chunk->nsg; + else if (chunk->npages == MTHCA_ICM_CHUNK_LEN) { + chunk->nsg = pci_map_sg(dev->pdev, chunk->mem, + chunk->npages, + PCI_DMA_BIDIRECTIONAL); + + if (chunk->nsg <= 0) + goto fail; + } + + if (chunk->npages == MTHCA_ICM_CHUNK_LEN) + chunk = NULL; + + npages -= 1 << cur_order; + } else { + --cur_order; + if (cur_order < 0) + goto fail; + } + } + + if (!coherent && chunk) { + chunk->nsg = pci_map_sg(dev->pdev, chunk->mem, + chunk->npages, + PCI_DMA_BIDIRECTIONAL); + + if (chunk->nsg <= 0) + goto fail; + } + + return icm; + +fail: + mthca_free_icm(dev, icm, coherent); + return NULL; +} + +int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj) +{ + int i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE; + int ret = 0; + + mutex_lock(&table->mutex); + + if (table->icm[i]) { + ++table->icm[i]->refcount; + goto out; + } + + table->icm[i] = mthca_alloc_icm(dev, MTHCA_TABLE_CHUNK_SIZE >> PAGE_SHIFT, + (table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) | + __GFP_NOWARN, table->coherent); + if (!table->icm[i]) { + ret = -ENOMEM; + goto out; + } + + if (mthca_MAP_ICM(dev, table->icm[i], + table->virt + i * MTHCA_TABLE_CHUNK_SIZE)) { + mthca_free_icm(dev, table->icm[i], table->coherent); + table->icm[i] = NULL; + ret = -ENOMEM; + goto out; + } + + ++table->icm[i]->refcount; + +out: + mutex_unlock(&table->mutex); + return ret; +} + +void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj) +{ + int i; + + if (!mthca_is_memfree(dev)) + return; + + i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE; + + mutex_lock(&table->mutex); + + if (--table->icm[i]->refcount == 0) { + mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE, + MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE); + mthca_free_icm(dev, table->icm[i], table->coherent); + table->icm[i] = NULL; + } + + mutex_unlock(&table->mutex); +} + +void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle) +{ + int idx, offset, dma_offset, i; + struct mthca_icm_chunk *chunk; + struct mthca_icm *icm; + struct page *page = NULL; + + if (!table->lowmem) + return NULL; + + mutex_lock(&table->mutex); + + idx = (obj & (table->num_obj - 1)) * table->obj_size; + icm = table->icm[idx / MTHCA_TABLE_CHUNK_SIZE]; + dma_offset = offset = idx % MTHCA_TABLE_CHUNK_SIZE; + + if (!icm) + goto out; + + list_for_each_entry(chunk, &icm->chunk_list, list) { + for (i = 0; i < chunk->npages; ++i) { + if (dma_handle && dma_offset >= 0) { + if (sg_dma_len(&chunk->mem[i]) > dma_offset) + *dma_handle = sg_dma_address(&chunk->mem[i]) + + dma_offset; + dma_offset -= sg_dma_len(&chunk->mem[i]); + } + /* DMA mapping can merge pages but not split them, + * so if we found the page, dma_handle has already + * been assigned to. */ + if (chunk->mem[i].length > offset) { + page = sg_page(&chunk->mem[i]); + goto out; + } + offset -= chunk->mem[i].length; + } + } + +out: + mutex_unlock(&table->mutex); + return page ? lowmem_page_address(page) + offset : NULL; +} + +int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table, + int start, int end) +{ + int inc = MTHCA_TABLE_CHUNK_SIZE / table->obj_size; + int i, err; + + for (i = start; i <= end; i += inc) { + err = mthca_table_get(dev, table, i); + if (err) + goto fail; + } + + return 0; + +fail: + while (i > start) { + i -= inc; + mthca_table_put(dev, table, i); + } + + return err; +} + +void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table, + int start, int end) +{ + int i; + + if (!mthca_is_memfree(dev)) + return; + + for (i = start; i <= end; i += MTHCA_TABLE_CHUNK_SIZE / table->obj_size) + mthca_table_put(dev, table, i); +} + +struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev, + u64 virt, int obj_size, + int nobj, int reserved, + int use_lowmem, int use_coherent) +{ + struct mthca_icm_table *table; + int obj_per_chunk; + int num_icm; + unsigned chunk_size; + int i; + + obj_per_chunk = MTHCA_TABLE_CHUNK_SIZE / obj_size; + num_icm = DIV_ROUND_UP(nobj, obj_per_chunk); + + table = kmalloc(struct_size(table, icm, num_icm), GFP_KERNEL); + if (!table) + return NULL; + + table->virt = virt; + table->num_icm = num_icm; + table->num_obj = nobj; + table->obj_size = obj_size; + table->lowmem = use_lowmem; + table->coherent = use_coherent; + mutex_init(&table->mutex); + + for (i = 0; i < num_icm; ++i) + table->icm[i] = NULL; + + for (i = 0; i * MTHCA_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) { + chunk_size = MTHCA_TABLE_CHUNK_SIZE; + if ((i + 1) * MTHCA_TABLE_CHUNK_SIZE > nobj * obj_size) + chunk_size = nobj * obj_size - i * MTHCA_TABLE_CHUNK_SIZE; + + table->icm[i] = mthca_alloc_icm(dev, chunk_size >> PAGE_SHIFT, + (use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) | + __GFP_NOWARN, use_coherent); + if (!table->icm[i]) + goto err; + if (mthca_MAP_ICM(dev, table->icm[i], + virt + i * MTHCA_TABLE_CHUNK_SIZE)) { + mthca_free_icm(dev, table->icm[i], table->coherent); + table->icm[i] = NULL; + goto err; + } + + /* + * Add a reference to this ICM chunk so that it never + * gets freed (since it contains reserved firmware objects). + */ + ++table->icm[i]->refcount; + } + + return table; + +err: + for (i = 0; i < num_icm; ++i) + if (table->icm[i]) { + mthca_UNMAP_ICM(dev, virt + i * MTHCA_TABLE_CHUNK_SIZE, + MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE); + mthca_free_icm(dev, table->icm[i], table->coherent); + } + + kfree(table); + + return NULL; +} + +void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table) +{ + int i; + + for (i = 0; i < table->num_icm; ++i) + if (table->icm[i]) { + mthca_UNMAP_ICM(dev, + table->virt + i * MTHCA_TABLE_CHUNK_SIZE, + MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE); + mthca_free_icm(dev, table->icm[i], table->coherent); + } + + kfree(table); +} + +static u64 mthca_uarc_virt(struct mthca_dev *dev, struct mthca_uar *uar, int page) +{ + return dev->uar_table.uarc_base + + uar->index * dev->uar_table.uarc_size + + page * MTHCA_ICM_PAGE_SIZE; +} + +int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar, + struct mthca_user_db_table *db_tab, int index, u64 uaddr) +{ + struct page *pages[1]; + int ret = 0; + int i; + + if (!mthca_is_memfree(dev)) + return 0; + + if (index < 0 || index > dev->uar_table.uarc_size / 8) + return -EINVAL; + + mutex_lock(&db_tab->mutex); + + i = index / MTHCA_DB_REC_PER_PAGE; + + if ((db_tab->page[i].refcount >= MTHCA_DB_REC_PER_PAGE) || + (db_tab->page[i].uvirt && db_tab->page[i].uvirt != uaddr) || + (uaddr & 4095)) { + ret = -EINVAL; + goto out; + } + + if (db_tab->page[i].refcount) { + ++db_tab->page[i].refcount; + goto out; + } + + ret = pin_user_pages_fast(uaddr & PAGE_MASK, 1, + FOLL_WRITE | FOLL_LONGTERM, pages); + if (ret < 0) + goto out; + + sg_set_page(&db_tab->page[i].mem, pages[0], MTHCA_ICM_PAGE_SIZE, + uaddr & ~PAGE_MASK); + + ret = pci_map_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE); + if (ret < 0) { + unpin_user_page(pages[0]); + goto out; + } + + ret = mthca_MAP_ICM_page(dev, sg_dma_address(&db_tab->page[i].mem), + mthca_uarc_virt(dev, uar, i)); + if (ret) { + pci_unmap_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE); + unpin_user_page(sg_page(&db_tab->page[i].mem)); + goto out; + } + + db_tab->page[i].uvirt = uaddr; + db_tab->page[i].refcount = 1; + +out: + mutex_unlock(&db_tab->mutex); + return ret; +} + +void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar, + struct mthca_user_db_table *db_tab, int index) +{ + if (!mthca_is_memfree(dev)) + return; + + /* + * To make our bookkeeping simpler, we don't unmap DB + * pages until we clean up the whole db table. + */ + + mutex_lock(&db_tab->mutex); + + --db_tab->page[index / MTHCA_DB_REC_PER_PAGE].refcount; + + mutex_unlock(&db_tab->mutex); +} + +struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev) +{ + struct mthca_user_db_table *db_tab; + int npages; + int i; + + if (!mthca_is_memfree(dev)) + return NULL; + + npages = dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE; + db_tab = kmalloc(struct_size(db_tab, page, npages), GFP_KERNEL); + if (!db_tab) + return ERR_PTR(-ENOMEM); + + mutex_init(&db_tab->mutex); + for (i = 0; i < npages; ++i) { + db_tab->page[i].refcount = 0; + db_tab->page[i].uvirt = 0; + sg_init_table(&db_tab->page[i].mem, 1); + } + + return db_tab; +} + +void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar, + struct mthca_user_db_table *db_tab) +{ + int i; + + if (!mthca_is_memfree(dev)) + return; + + for (i = 0; i < dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE; ++i) { + if (db_tab->page[i].uvirt) { + mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, uar, i), 1); + pci_unmap_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE); + unpin_user_page(sg_page(&db_tab->page[i].mem)); + } + } + + kfree(db_tab); +} + +int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type, + u32 qn, __be32 **db) +{ + int group; + int start, end, dir; + int i, j; + struct mthca_db_page *page; + int ret = 0; + + mutex_lock(&dev->db_tab->mutex); + + switch (type) { + case MTHCA_DB_TYPE_CQ_ARM: + case MTHCA_DB_TYPE_SQ: + group = 0; + start = 0; + end = dev->db_tab->max_group1; + dir = 1; + break; + + case MTHCA_DB_TYPE_CQ_SET_CI: + case MTHCA_DB_TYPE_RQ: + case MTHCA_DB_TYPE_SRQ: + group = 1; + start = dev->db_tab->npages - 1; + end = dev->db_tab->min_group2; + dir = -1; + break; + + default: + ret = -EINVAL; + goto out; + } + + for (i = start; i != end; i += dir) + if (dev->db_tab->page[i].db_rec && + !bitmap_full(dev->db_tab->page[i].used, + MTHCA_DB_REC_PER_PAGE)) { + page = dev->db_tab->page + i; + goto found; + } + + for (i = start; i != end; i += dir) + if (!dev->db_tab->page[i].db_rec) { + page = dev->db_tab->page + i; + goto alloc; + } + + if (dev->db_tab->max_group1 >= dev->db_tab->min_group2 - 1) { + ret = -ENOMEM; + goto out; + } + + if (group == 0) + ++dev->db_tab->max_group1; + else + --dev->db_tab->min_group2; + + page = dev->db_tab->page + end; + +alloc: + page->db_rec = dma_alloc_coherent(&dev->pdev->dev, + MTHCA_ICM_PAGE_SIZE, &page->mapping, + GFP_KERNEL); + if (!page->db_rec) { + ret = -ENOMEM; + goto out; + } + + ret = mthca_MAP_ICM_page(dev, page->mapping, + mthca_uarc_virt(dev, &dev->driver_uar, i)); + if (ret) { + dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE, + page->db_rec, page->mapping); + goto out; + } + + bitmap_zero(page->used, MTHCA_DB_REC_PER_PAGE); + +found: + j = find_first_zero_bit(page->used, MTHCA_DB_REC_PER_PAGE); + set_bit(j, page->used); + + if (group == 1) + j = MTHCA_DB_REC_PER_PAGE - 1 - j; + + ret = i * MTHCA_DB_REC_PER_PAGE + j; + + page->db_rec[j] = cpu_to_be64((qn << 8) | (type << 5)); + + *db = (__be32 *) &page->db_rec[j]; + +out: + mutex_unlock(&dev->db_tab->mutex); + + return ret; +} + +void mthca_free_db(struct mthca_dev *dev, int type, int db_index) +{ + int i, j; + struct mthca_db_page *page; + + i = db_index / MTHCA_DB_REC_PER_PAGE; + j = db_index % MTHCA_DB_REC_PER_PAGE; + + page = dev->db_tab->page + i; + + mutex_lock(&dev->db_tab->mutex); + + page->db_rec[j] = 0; + if (i >= dev->db_tab->min_group2) + j = MTHCA_DB_REC_PER_PAGE - 1 - j; + clear_bit(j, page->used); + + if (bitmap_empty(page->used, MTHCA_DB_REC_PER_PAGE) && + i >= dev->db_tab->max_group1 - 1) { + mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1); + + dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE, + page->db_rec, page->mapping); + page->db_rec = NULL; + + if (i == dev->db_tab->max_group1) { + --dev->db_tab->max_group1; + /* XXX may be able to unmap more pages now */ + } + if (i == dev->db_tab->min_group2) + ++dev->db_tab->min_group2; + } + + mutex_unlock(&dev->db_tab->mutex); +} + +int mthca_init_db_tab(struct mthca_dev *dev) +{ + int i; + + if (!mthca_is_memfree(dev)) + return 0; + + dev->db_tab = kmalloc(sizeof *dev->db_tab, GFP_KERNEL); + if (!dev->db_tab) + return -ENOMEM; + + mutex_init(&dev->db_tab->mutex); + + dev->db_tab->npages = dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE; + dev->db_tab->max_group1 = 0; + dev->db_tab->min_group2 = dev->db_tab->npages - 1; + + dev->db_tab->page = kmalloc_array(dev->db_tab->npages, + sizeof(*dev->db_tab->page), + GFP_KERNEL); + if (!dev->db_tab->page) { + kfree(dev->db_tab); + return -ENOMEM; + } + + for (i = 0; i < dev->db_tab->npages; ++i) + dev->db_tab->page[i].db_rec = NULL; + + return 0; +} + +void mthca_cleanup_db_tab(struct mthca_dev *dev) +{ + int i; + + if (!mthca_is_memfree(dev)) + return; + + /* + * Because we don't always free our UARC pages when they + * become empty to make mthca_free_db() simpler we need to + * make a sweep through the doorbell pages and free any + * leftover pages now. + */ + for (i = 0; i < dev->db_tab->npages; ++i) { + if (!dev->db_tab->page[i].db_rec) + continue; + + if (!bitmap_empty(dev->db_tab->page[i].used, MTHCA_DB_REC_PER_PAGE)) + mthca_warn(dev, "Kernel UARC page %d not empty\n", i); + + mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1); + + dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE, + dev->db_tab->page[i].db_rec, + dev->db_tab->page[i].mapping); + } + + kfree(dev->db_tab->page); + kfree(dev->db_tab); +} diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.h b/drivers/infiniband/hw/mthca/mthca_memfree.h new file mode 100644 index 000000000..f9a2e65e2 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_memfree.h @@ -0,0 +1,179 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Cisco Systems. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef MTHCA_MEMFREE_H +#define MTHCA_MEMFREE_H + +#include <linux/list.h> +#include <linux/mutex.h> + +#define MTHCA_ICM_CHUNK_LEN \ + ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \ + (sizeof (struct scatterlist))) + +enum { + MTHCA_ICM_PAGE_SHIFT = 12, + MTHCA_ICM_PAGE_SIZE = 1 << MTHCA_ICM_PAGE_SHIFT, + MTHCA_DB_REC_PER_PAGE = MTHCA_ICM_PAGE_SIZE / 8 +}; + +struct mthca_icm_chunk { + struct list_head list; + int npages; + int nsg; + struct scatterlist mem[MTHCA_ICM_CHUNK_LEN]; +}; + +struct mthca_icm { + struct list_head chunk_list; + int refcount; +}; + +struct mthca_icm_table { + u64 virt; + int num_icm; + int num_obj; + int obj_size; + int lowmem; + int coherent; + struct mutex mutex; + struct mthca_icm *icm[]; +}; + +struct mthca_icm_iter { + struct mthca_icm *icm; + struct mthca_icm_chunk *chunk; + int page_idx; +}; + +struct mthca_dev; + +struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages, + gfp_t gfp_mask, int coherent); +void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent); + +struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev, + u64 virt, int obj_size, + int nobj, int reserved, + int use_lowmem, int use_coherent); +void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table); +int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); +void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); +void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle); +int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table, + int start, int end); +void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table, + int start, int end); + +static inline void mthca_icm_first(struct mthca_icm *icm, + struct mthca_icm_iter *iter) +{ + iter->icm = icm; + iter->chunk = list_empty(&icm->chunk_list) ? + NULL : list_entry(icm->chunk_list.next, + struct mthca_icm_chunk, list); + iter->page_idx = 0; +} + +static inline int mthca_icm_last(struct mthca_icm_iter *iter) +{ + return !iter->chunk; +} + +static inline void mthca_icm_next(struct mthca_icm_iter *iter) +{ + if (++iter->page_idx >= iter->chunk->nsg) { + if (iter->chunk->list.next == &iter->icm->chunk_list) { + iter->chunk = NULL; + return; + } + + iter->chunk = list_entry(iter->chunk->list.next, + struct mthca_icm_chunk, list); + iter->page_idx = 0; + } +} + +static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter) +{ + return sg_dma_address(&iter->chunk->mem[iter->page_idx]); +} + +static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter) +{ + return sg_dma_len(&iter->chunk->mem[iter->page_idx]); +} + +struct mthca_db_page { + DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE); + __be64 *db_rec; + dma_addr_t mapping; +}; + +struct mthca_db_table { + int npages; + int max_group1; + int min_group2; + struct mthca_db_page *page; + struct mutex mutex; +}; + +enum mthca_db_type { + MTHCA_DB_TYPE_INVALID = 0x0, + MTHCA_DB_TYPE_CQ_SET_CI = 0x1, + MTHCA_DB_TYPE_CQ_ARM = 0x2, + MTHCA_DB_TYPE_SQ = 0x3, + MTHCA_DB_TYPE_RQ = 0x4, + MTHCA_DB_TYPE_SRQ = 0x5, + MTHCA_DB_TYPE_GROUP_SEP = 0x7 +}; + +struct mthca_user_db_table; +struct mthca_uar; + +int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar, + struct mthca_user_db_table *db_tab, int index, u64 uaddr); +void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar, + struct mthca_user_db_table *db_tab, int index); +struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev); +void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar, + struct mthca_user_db_table *db_tab); + +int mthca_init_db_tab(struct mthca_dev *dev); +void mthca_cleanup_db_tab(struct mthca_dev *dev); +int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type, + u32 qn, __be32 **db); +void mthca_free_db(struct mthca_dev *dev, int type, int db_index); + +#endif /* MTHCA_MEMFREE_H */ diff --git a/drivers/infiniband/hw/mthca/mthca_mr.c b/drivers/infiniband/hw/mthca/mthca_mr.c new file mode 100644 index 000000000..ce0e0867e --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_mr.c @@ -0,0 +1,705 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/slab.h> +#include <linux/errno.h> + +#include "mthca_dev.h" +#include "mthca_cmd.h" +#include "mthca_memfree.h" + +struct mthca_mtt { + struct mthca_buddy *buddy; + int order; + u32 first_seg; +}; + +/* + * Must be packed because mtt_seg is 64 bits but only aligned to 32 bits. + */ +struct mthca_mpt_entry { + __be32 flags; + __be32 page_size; + __be32 key; + __be32 pd; + __be64 start; + __be64 length; + __be32 lkey; + __be32 window_count; + __be32 window_count_limit; + __be64 mtt_seg; + __be32 mtt_sz; /* Arbel only */ + u32 reserved[2]; +} __packed; + +#define MTHCA_MPT_FLAG_SW_OWNS (0xfUL << 28) +#define MTHCA_MPT_FLAG_MIO (1 << 17) +#define MTHCA_MPT_FLAG_BIND_ENABLE (1 << 15) +#define MTHCA_MPT_FLAG_PHYSICAL (1 << 9) +#define MTHCA_MPT_FLAG_REGION (1 << 8) + +#define MTHCA_MTT_FLAG_PRESENT 1 + +#define MTHCA_MPT_STATUS_SW 0xF0 +#define MTHCA_MPT_STATUS_HW 0x00 + +#define SINAI_FMR_KEY_INC 0x1000000 + +/* + * Buddy allocator for MTT segments (currently not very efficient + * since it doesn't keep a free list and just searches linearly + * through the bitmaps) + */ + +static u32 mthca_buddy_alloc(struct mthca_buddy *buddy, int order) +{ + int o; + int m; + u32 seg; + + spin_lock(&buddy->lock); + + for (o = order; o <= buddy->max_order; ++o) + if (buddy->num_free[o]) { + m = 1 << (buddy->max_order - o); + seg = find_first_bit(buddy->bits[o], m); + if (seg < m) + goto found; + } + + spin_unlock(&buddy->lock); + return -1; + + found: + clear_bit(seg, buddy->bits[o]); + --buddy->num_free[o]; + + while (o > order) { + --o; + seg <<= 1; + set_bit(seg ^ 1, buddy->bits[o]); + ++buddy->num_free[o]; + } + + spin_unlock(&buddy->lock); + + seg <<= order; + + return seg; +} + +static void mthca_buddy_free(struct mthca_buddy *buddy, u32 seg, int order) +{ + seg >>= order; + + spin_lock(&buddy->lock); + + while (test_bit(seg ^ 1, buddy->bits[order])) { + clear_bit(seg ^ 1, buddy->bits[order]); + --buddy->num_free[order]; + seg >>= 1; + ++order; + } + + set_bit(seg, buddy->bits[order]); + ++buddy->num_free[order]; + + spin_unlock(&buddy->lock); +} + +static int mthca_buddy_init(struct mthca_buddy *buddy, int max_order) +{ + int i, s; + + buddy->max_order = max_order; + spin_lock_init(&buddy->lock); + + buddy->bits = kcalloc(buddy->max_order + 1, sizeof(long *), + GFP_KERNEL); + buddy->num_free = kcalloc((buddy->max_order + 1), sizeof *buddy->num_free, + GFP_KERNEL); + if (!buddy->bits || !buddy->num_free) + goto err_out; + + for (i = 0; i <= buddy->max_order; ++i) { + s = BITS_TO_LONGS(1 << (buddy->max_order - i)); + buddy->bits[i] = kmalloc_array(s, sizeof(long), GFP_KERNEL); + if (!buddy->bits[i]) + goto err_out_free; + bitmap_zero(buddy->bits[i], + 1 << (buddy->max_order - i)); + } + + set_bit(0, buddy->bits[buddy->max_order]); + buddy->num_free[buddy->max_order] = 1; + + return 0; + +err_out_free: + for (i = 0; i <= buddy->max_order; ++i) + kfree(buddy->bits[i]); + +err_out: + kfree(buddy->bits); + kfree(buddy->num_free); + + return -ENOMEM; +} + +static void mthca_buddy_cleanup(struct mthca_buddy *buddy) +{ + int i; + + for (i = 0; i <= buddy->max_order; ++i) + kfree(buddy->bits[i]); + + kfree(buddy->bits); + kfree(buddy->num_free); +} + +static u32 mthca_alloc_mtt_range(struct mthca_dev *dev, int order, + struct mthca_buddy *buddy) +{ + u32 seg = mthca_buddy_alloc(buddy, order); + + if (seg == -1) + return -1; + + if (mthca_is_memfree(dev)) + if (mthca_table_get_range(dev, dev->mr_table.mtt_table, seg, + seg + (1 << order) - 1)) { + mthca_buddy_free(buddy, seg, order); + seg = -1; + } + + return seg; +} + +static struct mthca_mtt *__mthca_alloc_mtt(struct mthca_dev *dev, int size, + struct mthca_buddy *buddy) +{ + struct mthca_mtt *mtt; + int i; + + if (size <= 0) + return ERR_PTR(-EINVAL); + + mtt = kmalloc(sizeof *mtt, GFP_KERNEL); + if (!mtt) + return ERR_PTR(-ENOMEM); + + mtt->buddy = buddy; + mtt->order = 0; + for (i = dev->limits.mtt_seg_size / 8; i < size; i <<= 1) + ++mtt->order; + + mtt->first_seg = mthca_alloc_mtt_range(dev, mtt->order, buddy); + if (mtt->first_seg == -1) { + kfree(mtt); + return ERR_PTR(-ENOMEM); + } + + return mtt; +} + +struct mthca_mtt *mthca_alloc_mtt(struct mthca_dev *dev, int size) +{ + return __mthca_alloc_mtt(dev, size, &dev->mr_table.mtt_buddy); +} + +void mthca_free_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt) +{ + if (!mtt) + return; + + mthca_buddy_free(mtt->buddy, mtt->first_seg, mtt->order); + + mthca_table_put_range(dev, dev->mr_table.mtt_table, + mtt->first_seg, + mtt->first_seg + (1 << mtt->order) - 1); + + kfree(mtt); +} + +static int __mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt, + int start_index, u64 *buffer_list, int list_len) +{ + struct mthca_mailbox *mailbox; + __be64 *mtt_entry; + int err = 0; + int i; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + mtt_entry = mailbox->buf; + + while (list_len > 0) { + mtt_entry[0] = cpu_to_be64(dev->mr_table.mtt_base + + mtt->first_seg * dev->limits.mtt_seg_size + + start_index * 8); + mtt_entry[1] = 0; + for (i = 0; i < list_len && i < MTHCA_MAILBOX_SIZE / 8 - 2; ++i) + mtt_entry[i + 2] = cpu_to_be64(buffer_list[i] | + MTHCA_MTT_FLAG_PRESENT); + + /* + * If we have an odd number of entries to write, add + * one more dummy entry for firmware efficiency. + */ + if (i & 1) + mtt_entry[i + 2] = 0; + + err = mthca_WRITE_MTT(dev, mailbox, (i + 1) & ~1); + if (err) { + mthca_warn(dev, "WRITE_MTT failed (%d)\n", err); + goto out; + } + + list_len -= i; + start_index += i; + buffer_list += i; + } + +out: + mthca_free_mailbox(dev, mailbox); + return err; +} + +int mthca_write_mtt_size(struct mthca_dev *dev) +{ + if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy || + !(dev->mthca_flags & MTHCA_FLAG_FMR)) + /* + * Be friendly to WRITE_MTT command + * and leave two empty slots for the + * index and reserved fields of the + * mailbox. + */ + return PAGE_SIZE / sizeof (u64) - 2; + + /* For Arbel, all MTTs must fit in the same page. */ + return mthca_is_memfree(dev) ? (PAGE_SIZE / sizeof (u64)) : 0x7ffffff; +} + +static void mthca_tavor_write_mtt_seg(struct mthca_dev *dev, + struct mthca_mtt *mtt, int start_index, + u64 *buffer_list, int list_len) +{ + u64 __iomem *mtts; + int i; + + mtts = dev->mr_table.tavor_fmr.mtt_base + mtt->first_seg * dev->limits.mtt_seg_size + + start_index * sizeof (u64); + for (i = 0; i < list_len; ++i) + mthca_write64_raw(cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT), + mtts + i); +} + +static void mthca_arbel_write_mtt_seg(struct mthca_dev *dev, + struct mthca_mtt *mtt, int start_index, + u64 *buffer_list, int list_len) +{ + __be64 *mtts; + dma_addr_t dma_handle; + int i; + int s = start_index * sizeof (u64); + + /* For Arbel, all MTTs must fit in the same page. */ + BUG_ON(s / PAGE_SIZE != (s + list_len * sizeof(u64) - 1) / PAGE_SIZE); + /* Require full segments */ + BUG_ON(s % dev->limits.mtt_seg_size); + + mtts = mthca_table_find(dev->mr_table.mtt_table, mtt->first_seg + + s / dev->limits.mtt_seg_size, &dma_handle); + + BUG_ON(!mtts); + + dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle, + list_len * sizeof (u64), DMA_TO_DEVICE); + + for (i = 0; i < list_len; ++i) + mtts[i] = cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT); + + dma_sync_single_for_device(&dev->pdev->dev, dma_handle, + list_len * sizeof (u64), DMA_TO_DEVICE); +} + +int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt, + int start_index, u64 *buffer_list, int list_len) +{ + int size = mthca_write_mtt_size(dev); + int chunk; + + if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy || + !(dev->mthca_flags & MTHCA_FLAG_FMR)) + return __mthca_write_mtt(dev, mtt, start_index, buffer_list, list_len); + + while (list_len > 0) { + chunk = min(size, list_len); + if (mthca_is_memfree(dev)) + mthca_arbel_write_mtt_seg(dev, mtt, start_index, + buffer_list, chunk); + else + mthca_tavor_write_mtt_seg(dev, mtt, start_index, + buffer_list, chunk); + + list_len -= chunk; + start_index += chunk; + buffer_list += chunk; + } + + return 0; +} + +static inline u32 tavor_hw_index_to_key(u32 ind) +{ + return ind; +} + +static inline u32 tavor_key_to_hw_index(u32 key) +{ + return key; +} + +static inline u32 arbel_hw_index_to_key(u32 ind) +{ + return (ind >> 24) | (ind << 8); +} + +static inline u32 arbel_key_to_hw_index(u32 key) +{ + return (key << 24) | (key >> 8); +} + +static inline u32 hw_index_to_key(struct mthca_dev *dev, u32 ind) +{ + if (mthca_is_memfree(dev)) + return arbel_hw_index_to_key(ind); + else + return tavor_hw_index_to_key(ind); +} + +static inline u32 key_to_hw_index(struct mthca_dev *dev, u32 key) +{ + if (mthca_is_memfree(dev)) + return arbel_key_to_hw_index(key); + else + return tavor_key_to_hw_index(key); +} + +static inline u32 adjust_key(struct mthca_dev *dev, u32 key) +{ + if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT) + return ((key << 20) & 0x800000) | (key & 0x7fffff); + else + return key; +} + +int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift, + u64 iova, u64 total_size, u32 access, struct mthca_mr *mr) +{ + struct mthca_mailbox *mailbox; + struct mthca_mpt_entry *mpt_entry; + u32 key; + int i; + int err; + + WARN_ON(buffer_size_shift >= 32); + + key = mthca_alloc(&dev->mr_table.mpt_alloc); + if (key == -1) + return -ENOMEM; + key = adjust_key(dev, key); + mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key); + + if (mthca_is_memfree(dev)) { + err = mthca_table_get(dev, dev->mr_table.mpt_table, key); + if (err) + goto err_out_mpt_free; + } + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) { + err = PTR_ERR(mailbox); + goto err_out_table; + } + mpt_entry = mailbox->buf; + + mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS | + MTHCA_MPT_FLAG_MIO | + MTHCA_MPT_FLAG_REGION | + access); + if (!mr->mtt) + mpt_entry->flags |= cpu_to_be32(MTHCA_MPT_FLAG_PHYSICAL); + + mpt_entry->page_size = cpu_to_be32(buffer_size_shift - 12); + mpt_entry->key = cpu_to_be32(key); + mpt_entry->pd = cpu_to_be32(pd); + mpt_entry->start = cpu_to_be64(iova); + mpt_entry->length = cpu_to_be64(total_size); + + memset(&mpt_entry->lkey, 0, + sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, lkey)); + + if (mr->mtt) + mpt_entry->mtt_seg = + cpu_to_be64(dev->mr_table.mtt_base + + mr->mtt->first_seg * dev->limits.mtt_seg_size); + + if (0) { + mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey); + for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) { + if (i % 4 == 0) + printk("[%02x] ", i * 4); + printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i])); + if ((i + 1) % 4 == 0) + printk("\n"); + } + } + + err = mthca_SW2HW_MPT(dev, mailbox, + key & (dev->limits.num_mpts - 1)); + if (err) { + mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err); + goto err_out_mailbox; + } + + mthca_free_mailbox(dev, mailbox); + return err; + +err_out_mailbox: + mthca_free_mailbox(dev, mailbox); + +err_out_table: + mthca_table_put(dev, dev->mr_table.mpt_table, key); + +err_out_mpt_free: + mthca_free(&dev->mr_table.mpt_alloc, key); + return err; +} + +int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd, + u32 access, struct mthca_mr *mr) +{ + mr->mtt = NULL; + return mthca_mr_alloc(dev, pd, 12, 0, ~0ULL, access, mr); +} + +int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd, + u64 *buffer_list, int buffer_size_shift, + int list_len, u64 iova, u64 total_size, + u32 access, struct mthca_mr *mr) +{ + int err; + + mr->mtt = mthca_alloc_mtt(dev, list_len); + if (IS_ERR(mr->mtt)) + return PTR_ERR(mr->mtt); + + err = mthca_write_mtt(dev, mr->mtt, 0, buffer_list, list_len); + if (err) { + mthca_free_mtt(dev, mr->mtt); + return err; + } + + err = mthca_mr_alloc(dev, pd, buffer_size_shift, iova, + total_size, access, mr); + if (err) + mthca_free_mtt(dev, mr->mtt); + + return err; +} + +/* Free mr */ +static void mthca_free_region(struct mthca_dev *dev, u32 lkey) +{ + mthca_table_put(dev, dev->mr_table.mpt_table, + key_to_hw_index(dev, lkey)); + + mthca_free(&dev->mr_table.mpt_alloc, key_to_hw_index(dev, lkey)); +} + +void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr) +{ + int err; + + err = mthca_HW2SW_MPT(dev, NULL, + key_to_hw_index(dev, mr->ibmr.lkey) & + (dev->limits.num_mpts - 1)); + if (err) + mthca_warn(dev, "HW2SW_MPT failed (%d)\n", err); + + mthca_free_region(dev, mr->ibmr.lkey); + mthca_free_mtt(dev, mr->mtt); +} + +int mthca_init_mr_table(struct mthca_dev *dev) +{ + phys_addr_t addr; + int mpts, mtts, err, i; + + err = mthca_alloc_init(&dev->mr_table.mpt_alloc, + dev->limits.num_mpts, + ~0, dev->limits.reserved_mrws); + if (err) + return err; + + if (!mthca_is_memfree(dev) && + (dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) + dev->limits.fmr_reserved_mtts = 0; + else + dev->mthca_flags |= MTHCA_FLAG_FMR; + + if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT) + mthca_dbg(dev, "Memory key throughput optimization activated.\n"); + + err = mthca_buddy_init(&dev->mr_table.mtt_buddy, + fls(dev->limits.num_mtt_segs - 1)); + + if (err) + goto err_mtt_buddy; + + dev->mr_table.tavor_fmr.mpt_base = NULL; + dev->mr_table.tavor_fmr.mtt_base = NULL; + + if (dev->limits.fmr_reserved_mtts) { + i = fls(dev->limits.fmr_reserved_mtts - 1); + + if (i >= 31) { + mthca_warn(dev, "Unable to reserve 2^31 FMR MTTs.\n"); + err = -EINVAL; + goto err_fmr_mpt; + } + mpts = mtts = 1 << i; + } else { + mtts = dev->limits.num_mtt_segs; + mpts = dev->limits.num_mpts; + } + + if (!mthca_is_memfree(dev) && + (dev->mthca_flags & MTHCA_FLAG_FMR)) { + + addr = pci_resource_start(dev->pdev, 4) + + ((pci_resource_len(dev->pdev, 4) - 1) & + dev->mr_table.mpt_base); + + dev->mr_table.tavor_fmr.mpt_base = + ioremap(addr, mpts * sizeof(struct mthca_mpt_entry)); + + if (!dev->mr_table.tavor_fmr.mpt_base) { + mthca_warn(dev, "MPT ioremap for FMR failed.\n"); + err = -ENOMEM; + goto err_fmr_mpt; + } + + addr = pci_resource_start(dev->pdev, 4) + + ((pci_resource_len(dev->pdev, 4) - 1) & + dev->mr_table.mtt_base); + + dev->mr_table.tavor_fmr.mtt_base = + ioremap(addr, mtts * dev->limits.mtt_seg_size); + if (!dev->mr_table.tavor_fmr.mtt_base) { + mthca_warn(dev, "MTT ioremap for FMR failed.\n"); + err = -ENOMEM; + goto err_fmr_mtt; + } + } + + if (dev->limits.fmr_reserved_mtts) { + err = mthca_buddy_init(&dev->mr_table.tavor_fmr.mtt_buddy, fls(mtts - 1)); + if (err) + goto err_fmr_mtt_buddy; + + /* Prevent regular MRs from using FMR keys */ + err = mthca_buddy_alloc(&dev->mr_table.mtt_buddy, fls(mtts - 1)); + if (err) + goto err_reserve_fmr; + + dev->mr_table.fmr_mtt_buddy = + &dev->mr_table.tavor_fmr.mtt_buddy; + } else + dev->mr_table.fmr_mtt_buddy = &dev->mr_table.mtt_buddy; + + /* FMR table is always the first, take reserved MTTs out of there */ + if (dev->limits.reserved_mtts) { + i = fls(dev->limits.reserved_mtts - 1); + + if (mthca_alloc_mtt_range(dev, i, + dev->mr_table.fmr_mtt_buddy) == -1) { + mthca_warn(dev, "MTT table of order %d is too small.\n", + dev->mr_table.fmr_mtt_buddy->max_order); + err = -ENOMEM; + goto err_reserve_mtts; + } + } + + return 0; + +err_reserve_mtts: +err_reserve_fmr: + if (dev->limits.fmr_reserved_mtts) + mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy); + +err_fmr_mtt_buddy: + if (dev->mr_table.tavor_fmr.mtt_base) + iounmap(dev->mr_table.tavor_fmr.mtt_base); + +err_fmr_mtt: + if (dev->mr_table.tavor_fmr.mpt_base) + iounmap(dev->mr_table.tavor_fmr.mpt_base); + +err_fmr_mpt: + mthca_buddy_cleanup(&dev->mr_table.mtt_buddy); + +err_mtt_buddy: + mthca_alloc_cleanup(&dev->mr_table.mpt_alloc); + + return err; +} + +void mthca_cleanup_mr_table(struct mthca_dev *dev) +{ + /* XXX check if any MRs are still allocated? */ + if (dev->limits.fmr_reserved_mtts) + mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy); + + mthca_buddy_cleanup(&dev->mr_table.mtt_buddy); + + if (dev->mr_table.tavor_fmr.mtt_base) + iounmap(dev->mr_table.tavor_fmr.mtt_base); + if (dev->mr_table.tavor_fmr.mpt_base) + iounmap(dev->mr_table.tavor_fmr.mpt_base); + + mthca_alloc_cleanup(&dev->mr_table.mpt_alloc); +} diff --git a/drivers/infiniband/hw/mthca/mthca_pd.c b/drivers/infiniband/hw/mthca/mthca_pd.c new file mode 100644 index 000000000..266f14e47 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_pd.c @@ -0,0 +1,81 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Cisco Systems. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/errno.h> + +#include "mthca_dev.h" + +int mthca_pd_alloc(struct mthca_dev *dev, int privileged, struct mthca_pd *pd) +{ + int err = 0; + + pd->privileged = privileged; + + atomic_set(&pd->sqp_count, 0); + pd->pd_num = mthca_alloc(&dev->pd_table.alloc); + if (pd->pd_num == -1) + return -ENOMEM; + + if (privileged) { + err = mthca_mr_alloc_notrans(dev, pd->pd_num, + MTHCA_MPT_FLAG_LOCAL_READ | + MTHCA_MPT_FLAG_LOCAL_WRITE, + &pd->ntmr); + if (err) + mthca_free(&dev->pd_table.alloc, pd->pd_num); + } + + return err; +} + +void mthca_pd_free(struct mthca_dev *dev, struct mthca_pd *pd) +{ + if (pd->privileged) + mthca_free_mr(dev, &pd->ntmr); + mthca_free(&dev->pd_table.alloc, pd->pd_num); +} + +int mthca_init_pd_table(struct mthca_dev *dev) +{ + return mthca_alloc_init(&dev->pd_table.alloc, + dev->limits.num_pds, + (1 << 24) - 1, + dev->limits.reserved_pds); +} + +void mthca_cleanup_pd_table(struct mthca_dev *dev) +{ + /* XXX check if any PDs are still allocated? */ + mthca_alloc_cleanup(&dev->pd_table.alloc); +} diff --git a/drivers/infiniband/hw/mthca/mthca_profile.c b/drivers/infiniband/hw/mthca/mthca_profile.c new file mode 100644 index 000000000..7ea970774 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_profile.c @@ -0,0 +1,281 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/string.h> +#include <linux/slab.h> + +#include "mthca_profile.h" + +enum { + MTHCA_RES_QP, + MTHCA_RES_EEC, + MTHCA_RES_SRQ, + MTHCA_RES_CQ, + MTHCA_RES_EQP, + MTHCA_RES_EEEC, + MTHCA_RES_EQ, + MTHCA_RES_RDB, + MTHCA_RES_MCG, + MTHCA_RES_MPT, + MTHCA_RES_MTT, + MTHCA_RES_UAR, + MTHCA_RES_UDAV, + MTHCA_RES_UARC, + MTHCA_RES_NUM +}; + +enum { + MTHCA_NUM_EQS = 32, + MTHCA_NUM_PDS = 1 << 15 +}; + +s64 mthca_make_profile(struct mthca_dev *dev, + struct mthca_profile *request, + struct mthca_dev_lim *dev_lim, + struct mthca_init_hca_param *init_hca) +{ + struct mthca_resource { + u64 size; + u64 start; + int type; + int num; + int log_num; + }; + + u64 mem_base, mem_avail; + s64 total_size = 0; + struct mthca_resource *profile; + int i, j; + + profile = kcalloc(MTHCA_RES_NUM, sizeof(*profile), GFP_KERNEL); + if (!profile) + return -ENOMEM; + + profile[MTHCA_RES_QP].size = dev_lim->qpc_entry_sz; + profile[MTHCA_RES_EEC].size = dev_lim->eec_entry_sz; + profile[MTHCA_RES_SRQ].size = dev_lim->srq_entry_sz; + profile[MTHCA_RES_CQ].size = dev_lim->cqc_entry_sz; + profile[MTHCA_RES_EQP].size = dev_lim->eqpc_entry_sz; + profile[MTHCA_RES_EEEC].size = dev_lim->eeec_entry_sz; + profile[MTHCA_RES_EQ].size = dev_lim->eqc_entry_sz; + profile[MTHCA_RES_RDB].size = MTHCA_RDB_ENTRY_SIZE; + profile[MTHCA_RES_MCG].size = MTHCA_MGM_ENTRY_SIZE; + profile[MTHCA_RES_MPT].size = dev_lim->mpt_entry_sz; + profile[MTHCA_RES_MTT].size = dev->limits.mtt_seg_size; + profile[MTHCA_RES_UAR].size = dev_lim->uar_scratch_entry_sz; + profile[MTHCA_RES_UDAV].size = MTHCA_AV_SIZE; + profile[MTHCA_RES_UARC].size = request->uarc_size; + + profile[MTHCA_RES_QP].num = request->num_qp; + profile[MTHCA_RES_SRQ].num = request->num_srq; + profile[MTHCA_RES_EQP].num = request->num_qp; + profile[MTHCA_RES_RDB].num = request->num_qp * request->rdb_per_qp; + profile[MTHCA_RES_CQ].num = request->num_cq; + profile[MTHCA_RES_EQ].num = MTHCA_NUM_EQS; + profile[MTHCA_RES_MCG].num = request->num_mcg; + profile[MTHCA_RES_MPT].num = request->num_mpt; + profile[MTHCA_RES_MTT].num = request->num_mtt; + profile[MTHCA_RES_UAR].num = request->num_uar; + profile[MTHCA_RES_UARC].num = request->num_uar; + profile[MTHCA_RES_UDAV].num = request->num_udav; + + for (i = 0; i < MTHCA_RES_NUM; ++i) { + profile[i].type = i; + profile[i].log_num = max(ffs(profile[i].num) - 1, 0); + profile[i].size *= profile[i].num; + if (mthca_is_memfree(dev)) + profile[i].size = max(profile[i].size, (u64) PAGE_SIZE); + } + + if (mthca_is_memfree(dev)) { + mem_base = 0; + mem_avail = dev_lim->hca.arbel.max_icm_sz; + } else { + mem_base = dev->ddr_start; + mem_avail = dev->fw.tavor.fw_start - dev->ddr_start; + } + + /* + * Sort the resources in decreasing order of size. Since they + * all have sizes that are powers of 2, we'll be able to keep + * resources aligned to their size and pack them without gaps + * using the sorted order. + */ + for (i = MTHCA_RES_NUM; i > 0; --i) + for (j = 1; j < i; ++j) { + if (profile[j].size > profile[j - 1].size) + swap(profile[j], profile[j - 1]); + } + + for (i = 0; i < MTHCA_RES_NUM; ++i) { + if (profile[i].size) { + profile[i].start = mem_base + total_size; + total_size += profile[i].size; + } + if (total_size > mem_avail) { + mthca_err(dev, "Profile requires 0x%llx bytes; " + "won't fit in 0x%llx bytes of context memory.\n", + (unsigned long long) total_size, + (unsigned long long) mem_avail); + kfree(profile); + return -ENOMEM; + } + + if (profile[i].size) + mthca_dbg(dev, "profile[%2d]--%2d/%2d @ 0x%16llx " + "(size 0x%8llx)\n", + i, profile[i].type, profile[i].log_num, + (unsigned long long) profile[i].start, + (unsigned long long) profile[i].size); + } + + if (mthca_is_memfree(dev)) + mthca_dbg(dev, "HCA context memory: reserving %d KB\n", + (int) (total_size >> 10)); + else + mthca_dbg(dev, "HCA memory: allocated %d KB/%d KB (%d KB free)\n", + (int) (total_size >> 10), (int) (mem_avail >> 10), + (int) ((mem_avail - total_size) >> 10)); + + for (i = 0; i < MTHCA_RES_NUM; ++i) { + switch (profile[i].type) { + case MTHCA_RES_QP: + dev->limits.num_qps = profile[i].num; + init_hca->qpc_base = profile[i].start; + init_hca->log_num_qps = profile[i].log_num; + break; + case MTHCA_RES_EEC: + dev->limits.num_eecs = profile[i].num; + init_hca->eec_base = profile[i].start; + init_hca->log_num_eecs = profile[i].log_num; + break; + case MTHCA_RES_SRQ: + dev->limits.num_srqs = profile[i].num; + init_hca->srqc_base = profile[i].start; + init_hca->log_num_srqs = profile[i].log_num; + break; + case MTHCA_RES_CQ: + dev->limits.num_cqs = profile[i].num; + init_hca->cqc_base = profile[i].start; + init_hca->log_num_cqs = profile[i].log_num; + break; + case MTHCA_RES_EQP: + init_hca->eqpc_base = profile[i].start; + break; + case MTHCA_RES_EEEC: + init_hca->eeec_base = profile[i].start; + break; + case MTHCA_RES_EQ: + dev->limits.num_eqs = profile[i].num; + init_hca->eqc_base = profile[i].start; + init_hca->log_num_eqs = profile[i].log_num; + break; + case MTHCA_RES_RDB: + for (dev->qp_table.rdb_shift = 0; + request->num_qp << dev->qp_table.rdb_shift < profile[i].num; + ++dev->qp_table.rdb_shift) + ; /* nothing */ + dev->qp_table.rdb_base = (u32) profile[i].start; + init_hca->rdb_base = profile[i].start; + break; + case MTHCA_RES_MCG: + dev->limits.num_mgms = profile[i].num >> 1; + dev->limits.num_amgms = profile[i].num >> 1; + init_hca->mc_base = profile[i].start; + init_hca->log_mc_entry_sz = ffs(MTHCA_MGM_ENTRY_SIZE) - 1; + init_hca->log_mc_table_sz = profile[i].log_num; + init_hca->mc_hash_sz = 1 << (profile[i].log_num - 1); + break; + case MTHCA_RES_MPT: + dev->limits.num_mpts = profile[i].num; + dev->mr_table.mpt_base = profile[i].start; + init_hca->mpt_base = profile[i].start; + init_hca->log_mpt_sz = profile[i].log_num; + break; + case MTHCA_RES_MTT: + dev->limits.num_mtt_segs = profile[i].num; + dev->mr_table.mtt_base = profile[i].start; + init_hca->mtt_base = profile[i].start; + init_hca->mtt_seg_sz = ffs(dev->limits.mtt_seg_size) - 7; + break; + case MTHCA_RES_UAR: + dev->limits.num_uars = profile[i].num; + init_hca->uar_scratch_base = profile[i].start; + break; + case MTHCA_RES_UDAV: + dev->av_table.ddr_av_base = profile[i].start; + dev->av_table.num_ddr_avs = profile[i].num; + break; + case MTHCA_RES_UARC: + dev->uar_table.uarc_size = request->uarc_size; + dev->uar_table.uarc_base = profile[i].start; + init_hca->uarc_base = profile[i].start; + init_hca->log_uarc_sz = ffs(request->uarc_size) - 13; + init_hca->log_uar_sz = ffs(request->num_uar) - 1; + break; + default: + break; + } + } + + /* + * PDs don't take any HCA memory, but we assign them as part + * of the HCA profile anyway. + */ + dev->limits.num_pds = MTHCA_NUM_PDS; + + if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT && + init_hca->log_mpt_sz > 23) { + mthca_warn(dev, "MPT table too large (requested size 2^%d >= 2^24)\n", + init_hca->log_mpt_sz); + mthca_warn(dev, "Disabling memory key throughput optimization.\n"); + dev->mthca_flags &= ~MTHCA_FLAG_SINAI_OPT; + } + + /* + * For Tavor, FMRs use ioremapped PCI memory. For 32 bit + * systems it may use too much vmalloc space to map all MTT + * memory, so we reserve some MTTs for FMR access, taking them + * out of the MR pool. They don't use additional memory, but + * we assign them as part of the HCA profile anyway. + */ + if (mthca_is_memfree(dev) || BITS_PER_LONG == 64) + dev->limits.fmr_reserved_mtts = 0; + else + dev->limits.fmr_reserved_mtts = request->fmr_reserved_mtts; + + kfree(profile); + return total_size; +} diff --git a/drivers/infiniband/hw/mthca/mthca_profile.h b/drivers/infiniband/hw/mthca/mthca_profile.h new file mode 100644 index 000000000..62b009cc8 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_profile.h @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef MTHCA_PROFILE_H +#define MTHCA_PROFILE_H + +#include "mthca_dev.h" +#include "mthca_cmd.h" + +struct mthca_profile { + int num_qp; + int rdb_per_qp; + int num_srq; + int num_cq; + int num_mcg; + int num_mpt; + int num_mtt; + int num_udav; + int num_uar; + int uarc_size; + int fmr_reserved_mtts; +}; + +s64 mthca_make_profile(struct mthca_dev *mdev, + struct mthca_profile *request, + struct mthca_dev_lim *dev_lim, + struct mthca_init_hca_param *init_hca); + +#endif /* MTHCA_PROFILE_H */ diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c new file mode 100644 index 000000000..c4d9cdc4e --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_provider.c @@ -0,0 +1,1222 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. + * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * Copyright (c) 2004 Voltaire, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <rdma/ib_smi.h> +#include <rdma/ib_umem.h> +#include <rdma/ib_user_verbs.h> +#include <rdma/uverbs_ioctl.h> + +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/mm.h> +#include <linux/export.h> + +#include "mthca_dev.h" +#include "mthca_cmd.h" +#include <rdma/mthca-abi.h> +#include "mthca_memfree.h" + +static void init_query_mad(struct ib_smp *mad) +{ + mad->base_version = 1; + mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED; + mad->class_version = 1; + mad->method = IB_MGMT_METHOD_GET; +} + +static int mthca_query_device(struct ib_device *ibdev, struct ib_device_attr *props, + struct ib_udata *uhw) +{ + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + struct mthca_dev *mdev = to_mdev(ibdev); + + if (uhw->inlen || uhw->outlen) + return -EINVAL; + + in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); + out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + memset(props, 0, sizeof *props); + + props->fw_ver = mdev->fw_ver; + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_NODE_INFO; + + err = mthca_MAD_IFC(mdev, 1, 1, + 1, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + props->device_cap_flags = mdev->device_cap_flags; + props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) & + 0xffffff; + props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30)); + props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32)); + memcpy(&props->sys_image_guid, out_mad->data + 4, 8); + + props->max_mr_size = ~0ull; + props->page_size_cap = mdev->limits.page_size_cap; + props->max_qp = mdev->limits.num_qps - mdev->limits.reserved_qps; + props->max_qp_wr = mdev->limits.max_wqes; + props->max_send_sge = mdev->limits.max_sg; + props->max_recv_sge = mdev->limits.max_sg; + props->max_sge_rd = mdev->limits.max_sg; + props->max_cq = mdev->limits.num_cqs - mdev->limits.reserved_cqs; + props->max_cqe = mdev->limits.max_cqes; + props->max_mr = mdev->limits.num_mpts - mdev->limits.reserved_mrws; + props->max_pd = mdev->limits.num_pds - mdev->limits.reserved_pds; + props->max_qp_rd_atom = 1 << mdev->qp_table.rdb_shift; + props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma; + props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp; + props->max_srq = mdev->limits.num_srqs - mdev->limits.reserved_srqs; + props->max_srq_wr = mdev->limits.max_srq_wqes; + props->max_srq_sge = mdev->limits.max_srq_sge; + props->local_ca_ack_delay = mdev->limits.local_ca_ack_delay; + props->atomic_cap = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ? + IB_ATOMIC_HCA : IB_ATOMIC_NONE; + props->max_pkeys = mdev->limits.pkey_table_len; + props->max_mcast_grp = mdev->limits.num_mgms + mdev->limits.num_amgms; + props->max_mcast_qp_attach = MTHCA_QP_PER_MGM; + props->max_total_mcast_qp_attach = props->max_mcast_qp_attach * + props->max_mcast_grp; + + err = 0; + out: + kfree(in_mad); + kfree(out_mad); + return err; +} + +static int mthca_query_port(struct ib_device *ibdev, + u8 port, struct ib_port_attr *props) +{ + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + + in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); + out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + /* props being zeroed by the caller, avoid zeroing it here */ + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_PORT_INFO; + in_mad->attr_mod = cpu_to_be32(port); + + err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, + port, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16)); + props->lmc = out_mad->data[34] & 0x7; + props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18)); + props->sm_sl = out_mad->data[36] & 0xf; + props->state = out_mad->data[32] & 0xf; + props->phys_state = out_mad->data[33] >> 4; + props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20)); + props->gid_tbl_len = to_mdev(ibdev)->limits.gid_table_len; + props->max_msg_sz = 0x80000000; + props->pkey_tbl_len = to_mdev(ibdev)->limits.pkey_table_len; + props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46)); + props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48)); + props->active_width = out_mad->data[31] & 0xf; + props->active_speed = out_mad->data[35] >> 4; + props->max_mtu = out_mad->data[41] & 0xf; + props->active_mtu = out_mad->data[36] >> 4; + props->subnet_timeout = out_mad->data[51] & 0x1f; + props->max_vl_num = out_mad->data[37] >> 4; + props->init_type_reply = out_mad->data[41] >> 4; + + out: + kfree(in_mad); + kfree(out_mad); + return err; +} + +static int mthca_modify_device(struct ib_device *ibdev, + int mask, + struct ib_device_modify *props) +{ + if (mask & ~IB_DEVICE_MODIFY_NODE_DESC) + return -EOPNOTSUPP; + + if (mask & IB_DEVICE_MODIFY_NODE_DESC) { + if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex)) + return -ERESTARTSYS; + memcpy(ibdev->node_desc, props->node_desc, + IB_DEVICE_NODE_DESC_MAX); + mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex); + } + + return 0; +} + +static int mthca_modify_port(struct ib_device *ibdev, + u8 port, int port_modify_mask, + struct ib_port_modify *props) +{ + struct mthca_set_ib_param set_ib; + struct ib_port_attr attr; + int err; + + if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex)) + return -ERESTARTSYS; + + err = ib_query_port(ibdev, port, &attr); + if (err) + goto out; + + set_ib.set_si_guid = 0; + set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR); + + set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) & + ~props->clr_port_cap_mask; + + err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port); + if (err) + goto out; +out: + mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex); + return err; +} + +static int mthca_query_pkey(struct ib_device *ibdev, + u8 port, u16 index, u16 *pkey) +{ + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + + in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); + out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE; + in_mad->attr_mod = cpu_to_be32(index / 32); + + err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, + port, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]); + + out: + kfree(in_mad); + kfree(out_mad); + return err; +} + +static int mthca_query_gid(struct ib_device *ibdev, u8 port, + int index, union ib_gid *gid) +{ + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + + in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); + out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_PORT_INFO; + in_mad->attr_mod = cpu_to_be32(port); + + err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, + port, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + memcpy(gid->raw, out_mad->data + 8, 8); + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_GUID_INFO; + in_mad->attr_mod = cpu_to_be32(index / 8); + + err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, + port, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8); + + out: + kfree(in_mad); + kfree(out_mad); + return err; +} + +static int mthca_alloc_ucontext(struct ib_ucontext *uctx, + struct ib_udata *udata) +{ + struct ib_device *ibdev = uctx->device; + struct mthca_alloc_ucontext_resp uresp = {}; + struct mthca_ucontext *context = to_mucontext(uctx); + int err; + + if (!(to_mdev(ibdev)->active)) + return -EAGAIN; + + uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps; + if (mthca_is_memfree(to_mdev(ibdev))) + uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size; + else + uresp.uarc_size = 0; + + err = mthca_uar_alloc(to_mdev(ibdev), &context->uar); + if (err) + return err; + + context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev)); + if (IS_ERR(context->db_tab)) { + err = PTR_ERR(context->db_tab); + mthca_uar_free(to_mdev(ibdev), &context->uar); + return err; + } + + if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) { + mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab); + mthca_uar_free(to_mdev(ibdev), &context->uar); + return -EFAULT; + } + + context->reg_mr_warned = 0; + + return 0; +} + +static void mthca_dealloc_ucontext(struct ib_ucontext *context) +{ + mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar, + to_mucontext(context)->db_tab); + mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar); +} + +static int mthca_mmap_uar(struct ib_ucontext *context, + struct vm_area_struct *vma) +{ + if (vma->vm_end - vma->vm_start != PAGE_SIZE) + return -EINVAL; + + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + + if (io_remap_pfn_range(vma, vma->vm_start, + to_mucontext(context)->uar.pfn, + PAGE_SIZE, vma->vm_page_prot)) + return -EAGAIN; + + return 0; +} + +static int mthca_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +{ + struct ib_device *ibdev = ibpd->device; + struct mthca_pd *pd = to_mpd(ibpd); + int err; + + err = mthca_pd_alloc(to_mdev(ibdev), !udata, pd); + if (err) + return err; + + if (udata) { + if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) { + mthca_pd_free(to_mdev(ibdev), pd); + return -EFAULT; + } + } + + return 0; +} + +static int mthca_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) +{ + mthca_pd_free(to_mdev(pd->device), to_mpd(pd)); + return 0; +} + +static int mthca_ah_create(struct ib_ah *ibah, + struct rdma_ah_init_attr *init_attr, + struct ib_udata *udata) + +{ + struct mthca_ah *ah = to_mah(ibah); + + return mthca_create_ah(to_mdev(ibah->device), to_mpd(ibah->pd), + init_attr->ah_attr, ah); +} + +static int mthca_ah_destroy(struct ib_ah *ah, u32 flags) +{ + mthca_destroy_ah(to_mdev(ah->device), to_mah(ah)); + return 0; +} + +static int mthca_create_srq(struct ib_srq *ibsrq, + struct ib_srq_init_attr *init_attr, + struct ib_udata *udata) +{ + struct mthca_create_srq ucmd; + struct mthca_ucontext *context = rdma_udata_to_drv_context( + udata, struct mthca_ucontext, ibucontext); + struct mthca_srq *srq = to_msrq(ibsrq); + int err; + + if (init_attr->srq_type != IB_SRQT_BASIC) + return -EOPNOTSUPP; + + if (udata) { + if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) + return -EFAULT; + + err = mthca_map_user_db(to_mdev(ibsrq->device), &context->uar, + context->db_tab, ucmd.db_index, + ucmd.db_page); + + if (err) + return err; + + srq->mr.ibmr.lkey = ucmd.lkey; + srq->db_index = ucmd.db_index; + } + + err = mthca_alloc_srq(to_mdev(ibsrq->device), to_mpd(ibsrq->pd), + &init_attr->attr, srq, udata); + + if (err && udata) + mthca_unmap_user_db(to_mdev(ibsrq->device), &context->uar, + context->db_tab, ucmd.db_index); + + if (err) + return err; + + if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof(__u32))) { + mthca_free_srq(to_mdev(ibsrq->device), srq); + return -EFAULT; + } + + return 0; +} + +static int mthca_destroy_srq(struct ib_srq *srq, struct ib_udata *udata) +{ + if (udata) { + struct mthca_ucontext *context = + rdma_udata_to_drv_context( + udata, + struct mthca_ucontext, + ibucontext); + + mthca_unmap_user_db(to_mdev(srq->device), &context->uar, + context->db_tab, to_msrq(srq)->db_index); + } + + mthca_free_srq(to_mdev(srq->device), to_msrq(srq)); + return 0; +} + +static struct ib_qp *mthca_create_qp(struct ib_pd *pd, + struct ib_qp_init_attr *init_attr, + struct ib_udata *udata) +{ + struct mthca_ucontext *context = rdma_udata_to_drv_context( + udata, struct mthca_ucontext, ibucontext); + struct mthca_create_qp ucmd; + struct mthca_qp *qp; + int err; + + if (init_attr->create_flags) + return ERR_PTR(-EINVAL); + + switch (init_attr->qp_type) { + case IB_QPT_RC: + case IB_QPT_UC: + case IB_QPT_UD: + { + qp = kzalloc(sizeof(*qp), GFP_KERNEL); + if (!qp) + return ERR_PTR(-ENOMEM); + + if (udata) { + if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { + kfree(qp); + return ERR_PTR(-EFAULT); + } + + err = mthca_map_user_db(to_mdev(pd->device), &context->uar, + context->db_tab, + ucmd.sq_db_index, ucmd.sq_db_page); + if (err) { + kfree(qp); + return ERR_PTR(err); + } + + err = mthca_map_user_db(to_mdev(pd->device), &context->uar, + context->db_tab, + ucmd.rq_db_index, ucmd.rq_db_page); + if (err) { + mthca_unmap_user_db(to_mdev(pd->device), + &context->uar, + context->db_tab, + ucmd.sq_db_index); + kfree(qp); + return ERR_PTR(err); + } + + qp->mr.ibmr.lkey = ucmd.lkey; + qp->sq.db_index = ucmd.sq_db_index; + qp->rq.db_index = ucmd.rq_db_index; + } + + err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd), + to_mcq(init_attr->send_cq), + to_mcq(init_attr->recv_cq), + init_attr->qp_type, init_attr->sq_sig_type, + &init_attr->cap, qp, udata); + + if (err && udata) { + mthca_unmap_user_db(to_mdev(pd->device), + &context->uar, + context->db_tab, + ucmd.sq_db_index); + mthca_unmap_user_db(to_mdev(pd->device), + &context->uar, + context->db_tab, + ucmd.rq_db_index); + } + + qp->ibqp.qp_num = qp->qpn; + break; + } + case IB_QPT_SMI: + case IB_QPT_GSI: + { + qp = kzalloc(sizeof(*qp), GFP_KERNEL); + if (!qp) + return ERR_PTR(-ENOMEM); + qp->sqp = kzalloc(sizeof(struct mthca_sqp), GFP_KERNEL); + if (!qp->sqp) { + kfree(qp); + return ERR_PTR(-ENOMEM); + } + + qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1; + + err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd), + to_mcq(init_attr->send_cq), + to_mcq(init_attr->recv_cq), + init_attr->sq_sig_type, &init_attr->cap, + qp->ibqp.qp_num, init_attr->port_num, + qp, udata); + break; + } + default: + /* Don't support raw QPs */ + return ERR_PTR(-EOPNOTSUPP); + } + + if (err) { + kfree(qp->sqp); + kfree(qp); + return ERR_PTR(err); + } + + init_attr->cap.max_send_wr = qp->sq.max; + init_attr->cap.max_recv_wr = qp->rq.max; + init_attr->cap.max_send_sge = qp->sq.max_gs; + init_attr->cap.max_recv_sge = qp->rq.max_gs; + init_attr->cap.max_inline_data = qp->max_inline_data; + + return &qp->ibqp; +} + +static int mthca_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) +{ + if (udata) { + struct mthca_ucontext *context = + rdma_udata_to_drv_context( + udata, + struct mthca_ucontext, + ibucontext); + + mthca_unmap_user_db(to_mdev(qp->device), + &context->uar, + context->db_tab, + to_mqp(qp)->sq.db_index); + mthca_unmap_user_db(to_mdev(qp->device), + &context->uar, + context->db_tab, + to_mqp(qp)->rq.db_index); + } + mthca_free_qp(to_mdev(qp->device), to_mqp(qp)); + kfree(to_mqp(qp)->sqp); + kfree(to_mqp(qp)); + return 0; +} + +static int mthca_create_cq(struct ib_cq *ibcq, + const struct ib_cq_init_attr *attr, + struct ib_udata *udata) +{ + struct ib_device *ibdev = ibcq->device; + int entries = attr->cqe; + struct mthca_create_cq ucmd; + struct mthca_cq *cq; + int nent; + int err; + struct mthca_ucontext *context = rdma_udata_to_drv_context( + udata, struct mthca_ucontext, ibucontext); + + if (attr->flags) + return -EINVAL; + + if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes) + return -EINVAL; + + if (udata) { + if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) + return -EFAULT; + + err = mthca_map_user_db(to_mdev(ibdev), &context->uar, + context->db_tab, ucmd.set_db_index, + ucmd.set_db_page); + if (err) + return err; + + err = mthca_map_user_db(to_mdev(ibdev), &context->uar, + context->db_tab, ucmd.arm_db_index, + ucmd.arm_db_page); + if (err) + goto err_unmap_set; + } + + cq = to_mcq(ibcq); + + if (udata) { + cq->buf.mr.ibmr.lkey = ucmd.lkey; + cq->set_ci_db_index = ucmd.set_db_index; + cq->arm_db_index = ucmd.arm_db_index; + } + + for (nent = 1; nent <= entries; nent <<= 1) + ; /* nothing */ + + err = mthca_init_cq(to_mdev(ibdev), nent, context, + udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num, + cq); + if (err) + goto err_unmap_arm; + + if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) { + mthca_free_cq(to_mdev(ibdev), cq); + err = -EFAULT; + goto err_unmap_arm; + } + + cq->resize_buf = NULL; + + return 0; + +err_unmap_arm: + if (udata) + mthca_unmap_user_db(to_mdev(ibdev), &context->uar, + context->db_tab, ucmd.arm_db_index); + +err_unmap_set: + if (udata) + mthca_unmap_user_db(to_mdev(ibdev), &context->uar, + context->db_tab, ucmd.set_db_index); + + return err; +} + +static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq, + int entries) +{ + int ret; + + spin_lock_irq(&cq->lock); + if (cq->resize_buf) { + ret = -EBUSY; + goto unlock; + } + + cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC); + if (!cq->resize_buf) { + ret = -ENOMEM; + goto unlock; + } + + cq->resize_buf->state = CQ_RESIZE_ALLOC; + + ret = 0; + +unlock: + spin_unlock_irq(&cq->lock); + + if (ret) + return ret; + + ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries); + if (ret) { + spin_lock_irq(&cq->lock); + kfree(cq->resize_buf); + cq->resize_buf = NULL; + spin_unlock_irq(&cq->lock); + return ret; + } + + cq->resize_buf->cqe = entries - 1; + + spin_lock_irq(&cq->lock); + cq->resize_buf->state = CQ_RESIZE_READY; + spin_unlock_irq(&cq->lock); + + return 0; +} + +static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) +{ + struct mthca_dev *dev = to_mdev(ibcq->device); + struct mthca_cq *cq = to_mcq(ibcq); + struct mthca_resize_cq ucmd; + u32 lkey; + int ret; + + if (entries < 1 || entries > dev->limits.max_cqes) + return -EINVAL; + + mutex_lock(&cq->mutex); + + entries = roundup_pow_of_two(entries + 1); + if (entries == ibcq->cqe + 1) { + ret = 0; + goto out; + } + + if (cq->is_kernel) { + ret = mthca_alloc_resize_buf(dev, cq, entries); + if (ret) + goto out; + lkey = cq->resize_buf->buf.mr.ibmr.lkey; + } else { + if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { + ret = -EFAULT; + goto out; + } + lkey = ucmd.lkey; + } + + ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries)); + + if (ret) { + if (cq->resize_buf) { + mthca_free_cq_buf(dev, &cq->resize_buf->buf, + cq->resize_buf->cqe); + kfree(cq->resize_buf); + spin_lock_irq(&cq->lock); + cq->resize_buf = NULL; + spin_unlock_irq(&cq->lock); + } + goto out; + } + + if (cq->is_kernel) { + struct mthca_cq_buf tbuf; + int tcqe; + + spin_lock_irq(&cq->lock); + if (cq->resize_buf->state == CQ_RESIZE_READY) { + mthca_cq_resize_copy_cqes(cq); + tbuf = cq->buf; + tcqe = cq->ibcq.cqe; + cq->buf = cq->resize_buf->buf; + cq->ibcq.cqe = cq->resize_buf->cqe; + } else { + tbuf = cq->resize_buf->buf; + tcqe = cq->resize_buf->cqe; + } + + kfree(cq->resize_buf); + cq->resize_buf = NULL; + spin_unlock_irq(&cq->lock); + + mthca_free_cq_buf(dev, &tbuf, tcqe); + } else + ibcq->cqe = entries - 1; + +out: + mutex_unlock(&cq->mutex); + + return ret; +} + +static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata) +{ + if (udata) { + struct mthca_ucontext *context = + rdma_udata_to_drv_context( + udata, + struct mthca_ucontext, + ibucontext); + + mthca_unmap_user_db(to_mdev(cq->device), + &context->uar, + context->db_tab, + to_mcq(cq)->arm_db_index); + mthca_unmap_user_db(to_mdev(cq->device), + &context->uar, + context->db_tab, + to_mcq(cq)->set_ci_db_index); + } + mthca_free_cq(to_mdev(cq->device), to_mcq(cq)); + return 0; +} + +static inline u32 convert_access(int acc) +{ + return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) | + (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) | + (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) | + (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) | + MTHCA_MPT_FLAG_LOCAL_READ; +} + +static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc) +{ + struct mthca_mr *mr; + int err; + + mr = kmalloc(sizeof *mr, GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + err = mthca_mr_alloc_notrans(to_mdev(pd->device), + to_mpd(pd)->pd_num, + convert_access(acc), mr); + + if (err) { + kfree(mr); + return ERR_PTR(err); + } + + mr->umem = NULL; + + return &mr->ibmr; +} + +static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, + u64 virt, int acc, struct ib_udata *udata) +{ + struct mthca_dev *dev = to_mdev(pd->device); + struct ib_block_iter biter; + struct mthca_ucontext *context = rdma_udata_to_drv_context( + udata, struct mthca_ucontext, ibucontext); + struct mthca_mr *mr; + struct mthca_reg_mr ucmd; + u64 *pages; + int n, i; + int err = 0; + int write_mtt_size; + + if (udata->inlen < sizeof ucmd) { + if (!context->reg_mr_warned) { + mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n", + current->comm); + mthca_warn(dev, " Update libmthca to fix this.\n"); + } + ++context->reg_mr_warned; + ucmd.mr_attrs = 0; + } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) + return ERR_PTR(-EFAULT); + + mr = kmalloc(sizeof *mr, GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + mr->umem = ib_umem_get(pd->device, start, length, acc); + if (IS_ERR(mr->umem)) { + err = PTR_ERR(mr->umem); + goto err; + } + + n = ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE); + + mr->mtt = mthca_alloc_mtt(dev, n); + if (IS_ERR(mr->mtt)) { + err = PTR_ERR(mr->mtt); + goto err_umem; + } + + pages = (u64 *) __get_free_page(GFP_KERNEL); + if (!pages) { + err = -ENOMEM; + goto err_mtt; + } + + i = n = 0; + + write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages)); + + rdma_umem_for_each_dma_block(mr->umem, &biter, PAGE_SIZE) { + pages[i++] = rdma_block_iter_dma_address(&biter); + + /* + * Be friendly to write_mtt and pass it chunks + * of appropriate size. + */ + if (i == write_mtt_size) { + err = mthca_write_mtt(dev, mr->mtt, n, pages, i); + if (err) + goto mtt_done; + n += i; + i = 0; + } + } + + if (i) + err = mthca_write_mtt(dev, mr->mtt, n, pages, i); +mtt_done: + free_page((unsigned long) pages); + if (err) + goto err_mtt; + + err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, PAGE_SHIFT, virt, length, + convert_access(acc), mr); + + if (err) + goto err_mtt; + + return &mr->ibmr; + +err_mtt: + mthca_free_mtt(dev, mr->mtt); + +err_umem: + ib_umem_release(mr->umem); + +err: + kfree(mr); + return ERR_PTR(err); +} + +static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata) +{ + struct mthca_mr *mmr = to_mmr(mr); + + mthca_free_mr(to_mdev(mr->device), mmr); + ib_umem_release(mmr->umem); + kfree(mmr); + + return 0; +} + +static ssize_t hw_rev_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct mthca_dev *dev = + rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); + + return sprintf(buf, "%x\n", dev->rev_id); +} +static DEVICE_ATTR_RO(hw_rev); + +static ssize_t hca_type_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct mthca_dev *dev = + rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); + + switch (dev->pdev->device) { + case PCI_DEVICE_ID_MELLANOX_TAVOR: + return sprintf(buf, "MT23108\n"); + case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT: + return sprintf(buf, "MT25208 (MT23108 compat mode)\n"); + case PCI_DEVICE_ID_MELLANOX_ARBEL: + return sprintf(buf, "MT25208\n"); + case PCI_DEVICE_ID_MELLANOX_SINAI: + case PCI_DEVICE_ID_MELLANOX_SINAI_OLD: + return sprintf(buf, "MT25204\n"); + default: + return sprintf(buf, "unknown\n"); + } +} +static DEVICE_ATTR_RO(hca_type); + +static ssize_t board_id_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct mthca_dev *dev = + rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); + + return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id); +} +static DEVICE_ATTR_RO(board_id); + +static struct attribute *mthca_dev_attributes[] = { + &dev_attr_hw_rev.attr, + &dev_attr_hca_type.attr, + &dev_attr_board_id.attr, + NULL +}; + +static const struct attribute_group mthca_attr_group = { + .attrs = mthca_dev_attributes, +}; + +static int mthca_init_node_data(struct mthca_dev *dev) +{ + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + + in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); + out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_NODE_DESC; + + err = mthca_MAD_IFC(dev, 1, 1, + 1, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX); + + in_mad->attr_id = IB_SMP_ATTR_NODE_INFO; + + err = mthca_MAD_IFC(dev, 1, 1, + 1, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + if (mthca_is_memfree(dev)) + dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32)); + memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8); + +out: + kfree(in_mad); + kfree(out_mad); + return err; +} + +static int mthca_port_immutable(struct ib_device *ibdev, u8 port_num, + struct ib_port_immutable *immutable) +{ + struct ib_port_attr attr; + int err; + + immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB; + + err = ib_query_port(ibdev, port_num, &attr); + if (err) + return err; + + immutable->pkey_tbl_len = attr.pkey_tbl_len; + immutable->gid_tbl_len = attr.gid_tbl_len; + immutable->max_mad_size = IB_MGMT_MAD_SIZE; + + return 0; +} + +static void get_dev_fw_str(struct ib_device *device, char *str) +{ + struct mthca_dev *dev = + container_of(device, struct mthca_dev, ib_dev); + snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d", + (int) (dev->fw_ver >> 32), + (int) (dev->fw_ver >> 16) & 0xffff, + (int) dev->fw_ver & 0xffff); +} + +static const struct ib_device_ops mthca_dev_ops = { + .owner = THIS_MODULE, + .driver_id = RDMA_DRIVER_MTHCA, + .uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION, + .uverbs_no_driver_id_binding = 1, + + .alloc_pd = mthca_alloc_pd, + .alloc_ucontext = mthca_alloc_ucontext, + .attach_mcast = mthca_multicast_attach, + .create_ah = mthca_ah_create, + .create_cq = mthca_create_cq, + .create_qp = mthca_create_qp, + .dealloc_pd = mthca_dealloc_pd, + .dealloc_ucontext = mthca_dealloc_ucontext, + .dereg_mr = mthca_dereg_mr, + .destroy_ah = mthca_ah_destroy, + .destroy_cq = mthca_destroy_cq, + .destroy_qp = mthca_destroy_qp, + .detach_mcast = mthca_multicast_detach, + .get_dev_fw_str = get_dev_fw_str, + .get_dma_mr = mthca_get_dma_mr, + .get_port_immutable = mthca_port_immutable, + .mmap = mthca_mmap_uar, + .modify_device = mthca_modify_device, + .modify_port = mthca_modify_port, + .modify_qp = mthca_modify_qp, + .poll_cq = mthca_poll_cq, + .process_mad = mthca_process_mad, + .query_ah = mthca_ah_query, + .query_device = mthca_query_device, + .query_gid = mthca_query_gid, + .query_pkey = mthca_query_pkey, + .query_port = mthca_query_port, + .query_qp = mthca_query_qp, + .reg_user_mr = mthca_reg_user_mr, + .resize_cq = mthca_resize_cq, + + INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah), + INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq), + INIT_RDMA_OBJ_SIZE(ib_pd, mthca_pd, ibpd), + INIT_RDMA_OBJ_SIZE(ib_ucontext, mthca_ucontext, ibucontext), +}; + +static const struct ib_device_ops mthca_dev_arbel_srq_ops = { + .create_srq = mthca_create_srq, + .destroy_srq = mthca_destroy_srq, + .modify_srq = mthca_modify_srq, + .post_srq_recv = mthca_arbel_post_srq_recv, + .query_srq = mthca_query_srq, + + INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq), +}; + +static const struct ib_device_ops mthca_dev_tavor_srq_ops = { + .create_srq = mthca_create_srq, + .destroy_srq = mthca_destroy_srq, + .modify_srq = mthca_modify_srq, + .post_srq_recv = mthca_tavor_post_srq_recv, + .query_srq = mthca_query_srq, + + INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq), +}; + +static const struct ib_device_ops mthca_dev_arbel_ops = { + .post_recv = mthca_arbel_post_receive, + .post_send = mthca_arbel_post_send, + .req_notify_cq = mthca_arbel_arm_cq, +}; + +static const struct ib_device_ops mthca_dev_tavor_ops = { + .post_recv = mthca_tavor_post_receive, + .post_send = mthca_tavor_post_send, + .req_notify_cq = mthca_tavor_arm_cq, +}; + +int mthca_register_device(struct mthca_dev *dev) +{ + int ret; + + ret = mthca_init_node_data(dev); + if (ret) + return ret; + + dev->ib_dev.uverbs_cmd_mask = + (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | + (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | + (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | + (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | + (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | + (1ull << IB_USER_VERBS_CMD_REG_MR) | + (1ull << IB_USER_VERBS_CMD_DEREG_MR) | + (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | + (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | + (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) | + (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | + (1ull << IB_USER_VERBS_CMD_CREATE_QP) | + (1ull << IB_USER_VERBS_CMD_QUERY_QP) | + (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | + (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | + (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | + (1ull << IB_USER_VERBS_CMD_DETACH_MCAST); + dev->ib_dev.node_type = RDMA_NODE_IB_CA; + dev->ib_dev.phys_port_cnt = dev->limits.num_ports; + dev->ib_dev.num_comp_vectors = 1; + dev->ib_dev.dev.parent = &dev->pdev->dev; + + if (dev->mthca_flags & MTHCA_FLAG_SRQ) { + dev->ib_dev.uverbs_cmd_mask |= + (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | + (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | + (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | + (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ); + + if (mthca_is_memfree(dev)) + ib_set_device_ops(&dev->ib_dev, + &mthca_dev_arbel_srq_ops); + else + ib_set_device_ops(&dev->ib_dev, + &mthca_dev_tavor_srq_ops); + } + + ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops); + + if (mthca_is_memfree(dev)) + ib_set_device_ops(&dev->ib_dev, &mthca_dev_arbel_ops); + else + ib_set_device_ops(&dev->ib_dev, &mthca_dev_tavor_ops); + + mutex_init(&dev->cap_mask_mutex); + + rdma_set_device_sysfs_group(&dev->ib_dev, &mthca_attr_group); + ret = ib_register_device(&dev->ib_dev, "mthca%d", &dev->pdev->dev); + if (ret) + return ret; + + mthca_start_catas_poll(dev); + + return 0; +} + +void mthca_unregister_device(struct mthca_dev *dev) +{ + mthca_stop_catas_poll(dev); + ib_unregister_device(&dev->ib_dev); +} diff --git a/drivers/infiniband/hw/mthca/mthca_provider.h b/drivers/infiniband/hw/mthca/mthca_provider.h new file mode 100644 index 000000000..8a77483bb --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_provider.h @@ -0,0 +1,316 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef MTHCA_PROVIDER_H +#define MTHCA_PROVIDER_H + +#include <rdma/ib_verbs.h> +#include <rdma/ib_pack.h> + +#define MTHCA_MPT_FLAG_ATOMIC (1 << 14) +#define MTHCA_MPT_FLAG_REMOTE_WRITE (1 << 13) +#define MTHCA_MPT_FLAG_REMOTE_READ (1 << 12) +#define MTHCA_MPT_FLAG_LOCAL_WRITE (1 << 11) +#define MTHCA_MPT_FLAG_LOCAL_READ (1 << 10) + +struct mthca_buf_list { + void *buf; + DEFINE_DMA_UNMAP_ADDR(mapping); +}; + +union mthca_buf { + struct mthca_buf_list direct; + struct mthca_buf_list *page_list; +}; + +struct mthca_uar { + unsigned long pfn; + int index; +}; + +struct mthca_user_db_table; + +struct mthca_ucontext { + struct ib_ucontext ibucontext; + struct mthca_uar uar; + struct mthca_user_db_table *db_tab; + int reg_mr_warned; +}; + +struct mthca_mtt; + +struct mthca_mr { + struct ib_mr ibmr; + struct ib_umem *umem; + struct mthca_mtt *mtt; +}; + +struct mthca_pd { + struct ib_pd ibpd; + u32 pd_num; + atomic_t sqp_count; + struct mthca_mr ntmr; + int privileged; +}; + +struct mthca_eq { + struct mthca_dev *dev; + int eqn; + u32 eqn_mask; + u32 cons_index; + u16 msi_x_vector; + u16 msi_x_entry; + int have_irq; + int nent; + struct mthca_buf_list *page_list; + struct mthca_mr mr; + char irq_name[IB_DEVICE_NAME_MAX]; +}; + +struct mthca_av; + +enum mthca_ah_type { + MTHCA_AH_ON_HCA, + MTHCA_AH_PCI_POOL, + MTHCA_AH_KMALLOC +}; + +struct mthca_ah { + struct ib_ah ibah; + enum mthca_ah_type type; + u32 key; + struct mthca_av *av; + dma_addr_t avdma; +}; + +/* + * Quick description of our CQ/QP locking scheme: + * + * We have one global lock that protects dev->cq/qp_table. Each + * struct mthca_cq/qp also has its own lock. An individual qp lock + * may be taken inside of an individual cq lock. Both cqs attached to + * a qp may be locked, with the cq with the lower cqn locked first. + * No other nesting should be done. + * + * Each struct mthca_cq/qp also has an ref count, protected by the + * corresponding table lock. The pointer from the cq/qp_table to the + * struct counts as one reference. This reference also is good for + * access through the consumer API, so modifying the CQ/QP etc doesn't + * need to take another reference. Access to a QP because of a + * completion being polled does not need a reference either. + * + * Finally, each struct mthca_cq/qp has a wait_queue_head_t for the + * destroy function to sleep on. + * + * This means that access from the consumer API requires nothing but + * taking the struct's lock. + * + * Access because of a completion event should go as follows: + * - lock cq/qp_table and look up struct + * - increment ref count in struct + * - drop cq/qp_table lock + * - lock struct, do your thing, and unlock struct + * - decrement ref count; if zero, wake up waiters + * + * To destroy a CQ/QP, we can do the following: + * - lock cq/qp_table + * - remove pointer and decrement ref count + * - unlock cq/qp_table lock + * - wait_event until ref count is zero + * + * It is the consumer's responsibilty to make sure that no QP + * operations (WQE posting or state modification) are pending when a + * QP is destroyed. Also, the consumer must make sure that calls to + * qp_modify are serialized. Similarly, the consumer is responsible + * for ensuring that no CQ resize operations are pending when a CQ + * is destroyed. + * + * Possible optimizations (wait for profile data to see if/where we + * have locks bouncing between CPUs): + * - split cq/qp table lock into n separate (cache-aligned) locks, + * indexed (say) by the page in the table + * - split QP struct lock into three (one for common info, one for the + * send queue and one for the receive queue) + */ + +struct mthca_cq_buf { + union mthca_buf queue; + struct mthca_mr mr; + int is_direct; +}; + +struct mthca_cq_resize { + struct mthca_cq_buf buf; + int cqe; + enum { + CQ_RESIZE_ALLOC, + CQ_RESIZE_READY, + CQ_RESIZE_SWAPPED + } state; +}; + +struct mthca_cq { + struct ib_cq ibcq; + spinlock_t lock; + int refcount; + int cqn; + u32 cons_index; + struct mthca_cq_buf buf; + struct mthca_cq_resize *resize_buf; + int is_kernel; + + /* Next fields are Arbel only */ + int set_ci_db_index; + __be32 *set_ci_db; + int arm_db_index; + __be32 *arm_db; + int arm_sn; + + wait_queue_head_t wait; + struct mutex mutex; +}; + +struct mthca_srq { + struct ib_srq ibsrq; + spinlock_t lock; + int refcount; + int srqn; + int max; + int max_gs; + int wqe_shift; + int first_free; + int last_free; + u16 counter; /* Arbel only */ + int db_index; /* Arbel only */ + __be32 *db; /* Arbel only */ + void *last; + + int is_direct; + u64 *wrid; + union mthca_buf queue; + struct mthca_mr mr; + + wait_queue_head_t wait; + struct mutex mutex; +}; + +struct mthca_wq { + spinlock_t lock; + int max; + unsigned next_ind; + unsigned last_comp; + unsigned head; + unsigned tail; + void *last; + int max_gs; + int wqe_shift; + + int db_index; /* Arbel only */ + __be32 *db; +}; + +struct mthca_sqp { + int pkey_index; + u32 qkey; + u32 send_psn; + struct ib_ud_header ud_header; + int header_buf_size; + void *header_buf; + dma_addr_t header_dma; +}; + +struct mthca_qp { + struct ib_qp ibqp; + int refcount; + u32 qpn; + int is_direct; + u8 port; /* for SQP and memfree use only */ + u8 alt_port; /* for memfree use only */ + u8 transport; + u8 state; + u8 atomic_rd_en; + u8 resp_depth; + + struct mthca_mr mr; + + struct mthca_wq rq; + struct mthca_wq sq; + enum ib_sig_type sq_policy; + int send_wqe_offset; + int max_inline_data; + + u64 *wrid; + union mthca_buf queue; + + wait_queue_head_t wait; + struct mutex mutex; + struct mthca_sqp *sqp; +}; + +static inline struct mthca_ucontext *to_mucontext(struct ib_ucontext *ibucontext) +{ + return container_of(ibucontext, struct mthca_ucontext, ibucontext); +} + +static inline struct mthca_mr *to_mmr(struct ib_mr *ibmr) +{ + return container_of(ibmr, struct mthca_mr, ibmr); +} + +static inline struct mthca_pd *to_mpd(struct ib_pd *ibpd) +{ + return container_of(ibpd, struct mthca_pd, ibpd); +} + +static inline struct mthca_ah *to_mah(struct ib_ah *ibah) +{ + return container_of(ibah, struct mthca_ah, ibah); +} + +static inline struct mthca_cq *to_mcq(struct ib_cq *ibcq) +{ + return container_of(ibcq, struct mthca_cq, ibcq); +} + +static inline struct mthca_srq *to_msrq(struct ib_srq *ibsrq) +{ + return container_of(ibsrq, struct mthca_srq, ibsrq); +} + +static inline struct mthca_qp *to_mqp(struct ib_qp *ibqp) +{ + return container_of(ibqp, struct mthca_qp, ibqp); +} + +#endif /* MTHCA_PROVIDER_H */ diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c new file mode 100644 index 000000000..3f57f7dfb --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_qp.c @@ -0,0 +1,2314 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Cisco Systems. All rights reserved. + * Copyright (c) 2005 Mellanox Technologies. All rights reserved. + * Copyright (c) 2004 Voltaire, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/sched.h> + +#include <asm/io.h> + +#include <rdma/ib_verbs.h> +#include <rdma/ib_cache.h> +#include <rdma/ib_pack.h> +#include <rdma/uverbs_ioctl.h> + +#include "mthca_dev.h" +#include "mthca_cmd.h" +#include "mthca_memfree.h" +#include "mthca_wqe.h" + +enum { + MTHCA_MAX_DIRECT_QP_SIZE = 4 * PAGE_SIZE, + MTHCA_ACK_REQ_FREQ = 10, + MTHCA_FLIGHT_LIMIT = 9, + MTHCA_UD_HEADER_SIZE = 72, /* largest UD header possible */ + MTHCA_INLINE_HEADER_SIZE = 4, /* data segment overhead for inline */ + MTHCA_INLINE_CHUNK_SIZE = 16 /* inline data segment chunk */ +}; + +enum { + MTHCA_QP_STATE_RST = 0, + MTHCA_QP_STATE_INIT = 1, + MTHCA_QP_STATE_RTR = 2, + MTHCA_QP_STATE_RTS = 3, + MTHCA_QP_STATE_SQE = 4, + MTHCA_QP_STATE_SQD = 5, + MTHCA_QP_STATE_ERR = 6, + MTHCA_QP_STATE_DRAINING = 7 +}; + +enum { + MTHCA_QP_ST_RC = 0x0, + MTHCA_QP_ST_UC = 0x1, + MTHCA_QP_ST_RD = 0x2, + MTHCA_QP_ST_UD = 0x3, + MTHCA_QP_ST_MLX = 0x7 +}; + +enum { + MTHCA_QP_PM_MIGRATED = 0x3, + MTHCA_QP_PM_ARMED = 0x0, + MTHCA_QP_PM_REARM = 0x1 +}; + +enum { + /* qp_context flags */ + MTHCA_QP_BIT_DE = 1 << 8, + /* params1 */ + MTHCA_QP_BIT_SRE = 1 << 15, + MTHCA_QP_BIT_SWE = 1 << 14, + MTHCA_QP_BIT_SAE = 1 << 13, + MTHCA_QP_BIT_SIC = 1 << 4, + MTHCA_QP_BIT_SSC = 1 << 3, + /* params2 */ + MTHCA_QP_BIT_RRE = 1 << 15, + MTHCA_QP_BIT_RWE = 1 << 14, + MTHCA_QP_BIT_RAE = 1 << 13, + MTHCA_QP_BIT_RIC = 1 << 4, + MTHCA_QP_BIT_RSC = 1 << 3 +}; + +enum { + MTHCA_SEND_DOORBELL_FENCE = 1 << 5 +}; + +struct mthca_qp_path { + __be32 port_pkey; + u8 rnr_retry; + u8 g_mylmc; + __be16 rlid; + u8 ackto; + u8 mgid_index; + u8 static_rate; + u8 hop_limit; + __be32 sl_tclass_flowlabel; + u8 rgid[16]; +} __packed; + +struct mthca_qp_context { + __be32 flags; + __be32 tavor_sched_queue; /* Reserved on Arbel */ + u8 mtu_msgmax; + u8 rq_size_stride; /* Reserved on Tavor */ + u8 sq_size_stride; /* Reserved on Tavor */ + u8 rlkey_arbel_sched_queue; /* Reserved on Tavor */ + __be32 usr_page; + __be32 local_qpn; + __be32 remote_qpn; + u32 reserved1[2]; + struct mthca_qp_path pri_path; + struct mthca_qp_path alt_path; + __be32 rdd; + __be32 pd; + __be32 wqe_base; + __be32 wqe_lkey; + __be32 params1; + __be32 reserved2; + __be32 next_send_psn; + __be32 cqn_snd; + __be32 snd_wqe_base_l; /* Next send WQE on Tavor */ + __be32 snd_db_index; /* (debugging only entries) */ + __be32 last_acked_psn; + __be32 ssn; + __be32 params2; + __be32 rnr_nextrecvpsn; + __be32 ra_buff_indx; + __be32 cqn_rcv; + __be32 rcv_wqe_base_l; /* Next recv WQE on Tavor */ + __be32 rcv_db_index; /* (debugging only entries) */ + __be32 qkey; + __be32 srqn; + __be32 rmsn; + __be16 rq_wqe_counter; /* reserved on Tavor */ + __be16 sq_wqe_counter; /* reserved on Tavor */ + u32 reserved3[18]; +} __packed; + +struct mthca_qp_param { + __be32 opt_param_mask; + u32 reserved1; + struct mthca_qp_context context; + u32 reserved2[62]; +} __packed; + +enum { + MTHCA_QP_OPTPAR_ALT_ADDR_PATH = 1 << 0, + MTHCA_QP_OPTPAR_RRE = 1 << 1, + MTHCA_QP_OPTPAR_RAE = 1 << 2, + MTHCA_QP_OPTPAR_RWE = 1 << 3, + MTHCA_QP_OPTPAR_PKEY_INDEX = 1 << 4, + MTHCA_QP_OPTPAR_Q_KEY = 1 << 5, + MTHCA_QP_OPTPAR_RNR_TIMEOUT = 1 << 6, + MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH = 1 << 7, + MTHCA_QP_OPTPAR_SRA_MAX = 1 << 8, + MTHCA_QP_OPTPAR_RRA_MAX = 1 << 9, + MTHCA_QP_OPTPAR_PM_STATE = 1 << 10, + MTHCA_QP_OPTPAR_PORT_NUM = 1 << 11, + MTHCA_QP_OPTPAR_RETRY_COUNT = 1 << 12, + MTHCA_QP_OPTPAR_ALT_RNR_RETRY = 1 << 13, + MTHCA_QP_OPTPAR_ACK_TIMEOUT = 1 << 14, + MTHCA_QP_OPTPAR_RNR_RETRY = 1 << 15, + MTHCA_QP_OPTPAR_SCHED_QUEUE = 1 << 16 +}; + +static const u8 mthca_opcode[] = { + [IB_WR_SEND] = MTHCA_OPCODE_SEND, + [IB_WR_SEND_WITH_IMM] = MTHCA_OPCODE_SEND_IMM, + [IB_WR_RDMA_WRITE] = MTHCA_OPCODE_RDMA_WRITE, + [IB_WR_RDMA_WRITE_WITH_IMM] = MTHCA_OPCODE_RDMA_WRITE_IMM, + [IB_WR_RDMA_READ] = MTHCA_OPCODE_RDMA_READ, + [IB_WR_ATOMIC_CMP_AND_SWP] = MTHCA_OPCODE_ATOMIC_CS, + [IB_WR_ATOMIC_FETCH_AND_ADD] = MTHCA_OPCODE_ATOMIC_FA, +}; + +static int is_sqp(struct mthca_dev *dev, struct mthca_qp *qp) +{ + return qp->qpn >= dev->qp_table.sqp_start && + qp->qpn <= dev->qp_table.sqp_start + 3; +} + +static int is_qp0(struct mthca_dev *dev, struct mthca_qp *qp) +{ + return qp->qpn >= dev->qp_table.sqp_start && + qp->qpn <= dev->qp_table.sqp_start + 1; +} + +static void *get_recv_wqe(struct mthca_qp *qp, int n) +{ + if (qp->is_direct) + return qp->queue.direct.buf + (n << qp->rq.wqe_shift); + else + return qp->queue.page_list[(n << qp->rq.wqe_shift) >> PAGE_SHIFT].buf + + ((n << qp->rq.wqe_shift) & (PAGE_SIZE - 1)); +} + +static void *get_send_wqe(struct mthca_qp *qp, int n) +{ + if (qp->is_direct) + return qp->queue.direct.buf + qp->send_wqe_offset + + (n << qp->sq.wqe_shift); + else + return qp->queue.page_list[(qp->send_wqe_offset + + (n << qp->sq.wqe_shift)) >> + PAGE_SHIFT].buf + + ((qp->send_wqe_offset + (n << qp->sq.wqe_shift)) & + (PAGE_SIZE - 1)); +} + +static void mthca_wq_reset(struct mthca_wq *wq) +{ + wq->next_ind = 0; + wq->last_comp = wq->max - 1; + wq->head = 0; + wq->tail = 0; +} + +void mthca_qp_event(struct mthca_dev *dev, u32 qpn, + enum ib_event_type event_type) +{ + struct mthca_qp *qp; + struct ib_event event; + + spin_lock(&dev->qp_table.lock); + qp = mthca_array_get(&dev->qp_table.qp, qpn & (dev->limits.num_qps - 1)); + if (qp) + ++qp->refcount; + spin_unlock(&dev->qp_table.lock); + + if (!qp) { + mthca_warn(dev, "Async event %d for bogus QP %08x\n", + event_type, qpn); + return; + } + + if (event_type == IB_EVENT_PATH_MIG) + qp->port = qp->alt_port; + + event.device = &dev->ib_dev; + event.event = event_type; + event.element.qp = &qp->ibqp; + if (qp->ibqp.event_handler) + qp->ibqp.event_handler(&event, qp->ibqp.qp_context); + + spin_lock(&dev->qp_table.lock); + if (!--qp->refcount) + wake_up(&qp->wait); + spin_unlock(&dev->qp_table.lock); +} + +static int to_mthca_state(enum ib_qp_state ib_state) +{ + switch (ib_state) { + case IB_QPS_RESET: return MTHCA_QP_STATE_RST; + case IB_QPS_INIT: return MTHCA_QP_STATE_INIT; + case IB_QPS_RTR: return MTHCA_QP_STATE_RTR; + case IB_QPS_RTS: return MTHCA_QP_STATE_RTS; + case IB_QPS_SQD: return MTHCA_QP_STATE_SQD; + case IB_QPS_SQE: return MTHCA_QP_STATE_SQE; + case IB_QPS_ERR: return MTHCA_QP_STATE_ERR; + default: return -1; + } +} + +enum { RC, UC, UD, RD, RDEE, MLX, NUM_TRANS }; + +static int to_mthca_st(int transport) +{ + switch (transport) { + case RC: return MTHCA_QP_ST_RC; + case UC: return MTHCA_QP_ST_UC; + case UD: return MTHCA_QP_ST_UD; + case RD: return MTHCA_QP_ST_RD; + case MLX: return MTHCA_QP_ST_MLX; + default: return -1; + } +} + +static void store_attrs(struct mthca_sqp *sqp, const struct ib_qp_attr *attr, + int attr_mask) +{ + if (attr_mask & IB_QP_PKEY_INDEX) + sqp->pkey_index = attr->pkey_index; + if (attr_mask & IB_QP_QKEY) + sqp->qkey = attr->qkey; + if (attr_mask & IB_QP_SQ_PSN) + sqp->send_psn = attr->sq_psn; +} + +static void init_port(struct mthca_dev *dev, int port) +{ + int err; + struct mthca_init_ib_param param; + + memset(¶m, 0, sizeof param); + + param.port_width = dev->limits.port_width_cap; + param.vl_cap = dev->limits.vl_cap; + param.mtu_cap = dev->limits.mtu_cap; + param.gid_cap = dev->limits.gid_table_len; + param.pkey_cap = dev->limits.pkey_table_len; + + err = mthca_INIT_IB(dev, ¶m, port); + if (err) + mthca_warn(dev, "INIT_IB failed, return code %d.\n", err); +} + +static __be32 get_hw_access_flags(struct mthca_qp *qp, const struct ib_qp_attr *attr, + int attr_mask) +{ + u8 dest_rd_atomic; + u32 access_flags; + u32 hw_access_flags = 0; + + if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) + dest_rd_atomic = attr->max_dest_rd_atomic; + else + dest_rd_atomic = qp->resp_depth; + + if (attr_mask & IB_QP_ACCESS_FLAGS) + access_flags = attr->qp_access_flags; + else + access_flags = qp->atomic_rd_en; + + if (!dest_rd_atomic) + access_flags &= IB_ACCESS_REMOTE_WRITE; + + if (access_flags & IB_ACCESS_REMOTE_READ) + hw_access_flags |= MTHCA_QP_BIT_RRE; + if (access_flags & IB_ACCESS_REMOTE_ATOMIC) + hw_access_flags |= MTHCA_QP_BIT_RAE; + if (access_flags & IB_ACCESS_REMOTE_WRITE) + hw_access_flags |= MTHCA_QP_BIT_RWE; + + return cpu_to_be32(hw_access_flags); +} + +static inline enum ib_qp_state to_ib_qp_state(int mthca_state) +{ + switch (mthca_state) { + case MTHCA_QP_STATE_RST: return IB_QPS_RESET; + case MTHCA_QP_STATE_INIT: return IB_QPS_INIT; + case MTHCA_QP_STATE_RTR: return IB_QPS_RTR; + case MTHCA_QP_STATE_RTS: return IB_QPS_RTS; + case MTHCA_QP_STATE_DRAINING: + case MTHCA_QP_STATE_SQD: return IB_QPS_SQD; + case MTHCA_QP_STATE_SQE: return IB_QPS_SQE; + case MTHCA_QP_STATE_ERR: return IB_QPS_ERR; + default: return -1; + } +} + +static inline enum ib_mig_state to_ib_mig_state(int mthca_mig_state) +{ + switch (mthca_mig_state) { + case 0: return IB_MIG_ARMED; + case 1: return IB_MIG_REARM; + case 3: return IB_MIG_MIGRATED; + default: return -1; + } +} + +static int to_ib_qp_access_flags(int mthca_flags) +{ + int ib_flags = 0; + + if (mthca_flags & MTHCA_QP_BIT_RRE) + ib_flags |= IB_ACCESS_REMOTE_READ; + if (mthca_flags & MTHCA_QP_BIT_RWE) + ib_flags |= IB_ACCESS_REMOTE_WRITE; + if (mthca_flags & MTHCA_QP_BIT_RAE) + ib_flags |= IB_ACCESS_REMOTE_ATOMIC; + + return ib_flags; +} + +static void to_rdma_ah_attr(struct mthca_dev *dev, + struct rdma_ah_attr *ah_attr, + struct mthca_qp_path *path) +{ + u8 port_num = (be32_to_cpu(path->port_pkey) >> 24) & 0x3; + + memset(ah_attr, 0, sizeof(*ah_attr)); + + if (port_num == 0 || port_num > dev->limits.num_ports) + return; + ah_attr->type = rdma_ah_find_type(&dev->ib_dev, port_num); + rdma_ah_set_port_num(ah_attr, port_num); + + rdma_ah_set_dlid(ah_attr, be16_to_cpu(path->rlid)); + rdma_ah_set_sl(ah_attr, be32_to_cpu(path->sl_tclass_flowlabel) >> 28); + rdma_ah_set_path_bits(ah_attr, path->g_mylmc & 0x7f); + rdma_ah_set_static_rate(ah_attr, + mthca_rate_to_ib(dev, + path->static_rate & 0xf, + port_num)); + if (path->g_mylmc & (1 << 7)) { + u32 tc_fl = be32_to_cpu(path->sl_tclass_flowlabel); + + rdma_ah_set_grh(ah_attr, NULL, + tc_fl & 0xfffff, + path->mgid_index & + (dev->limits.gid_table_len - 1), + path->hop_limit, + (tc_fl >> 20) & 0xff); + rdma_ah_set_dgid_raw(ah_attr, path->rgid); + } +} + +int mthca_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, + struct ib_qp_init_attr *qp_init_attr) +{ + struct mthca_dev *dev = to_mdev(ibqp->device); + struct mthca_qp *qp = to_mqp(ibqp); + int err = 0; + struct mthca_mailbox *mailbox = NULL; + struct mthca_qp_param *qp_param; + struct mthca_qp_context *context; + int mthca_state; + + mutex_lock(&qp->mutex); + + if (qp->state == IB_QPS_RESET) { + qp_attr->qp_state = IB_QPS_RESET; + goto done; + } + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) { + err = PTR_ERR(mailbox); + goto out; + } + + err = mthca_QUERY_QP(dev, qp->qpn, 0, mailbox); + if (err) { + mthca_warn(dev, "QUERY_QP failed (%d)\n", err); + goto out_mailbox; + } + + qp_param = mailbox->buf; + context = &qp_param->context; + mthca_state = be32_to_cpu(context->flags) >> 28; + + qp->state = to_ib_qp_state(mthca_state); + qp_attr->qp_state = qp->state; + qp_attr->path_mtu = context->mtu_msgmax >> 5; + qp_attr->path_mig_state = + to_ib_mig_state((be32_to_cpu(context->flags) >> 11) & 0x3); + qp_attr->qkey = be32_to_cpu(context->qkey); + qp_attr->rq_psn = be32_to_cpu(context->rnr_nextrecvpsn) & 0xffffff; + qp_attr->sq_psn = be32_to_cpu(context->next_send_psn) & 0xffffff; + qp_attr->dest_qp_num = be32_to_cpu(context->remote_qpn) & 0xffffff; + qp_attr->qp_access_flags = + to_ib_qp_access_flags(be32_to_cpu(context->params2)); + + if (qp->transport == RC || qp->transport == UC) { + to_rdma_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path); + to_rdma_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path); + qp_attr->alt_pkey_index = + be32_to_cpu(context->alt_path.port_pkey) & 0x7f; + qp_attr->alt_port_num = + rdma_ah_get_port_num(&qp_attr->alt_ah_attr); + } + + qp_attr->pkey_index = be32_to_cpu(context->pri_path.port_pkey) & 0x7f; + qp_attr->port_num = + (be32_to_cpu(context->pri_path.port_pkey) >> 24) & 0x3; + + /* qp_attr->en_sqd_async_notify is only applicable in modify qp */ + qp_attr->sq_draining = mthca_state == MTHCA_QP_STATE_DRAINING; + + qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context->params1) >> 21) & 0x7); + + qp_attr->max_dest_rd_atomic = + 1 << ((be32_to_cpu(context->params2) >> 21) & 0x7); + qp_attr->min_rnr_timer = + (be32_to_cpu(context->rnr_nextrecvpsn) >> 24) & 0x1f; + qp_attr->timeout = context->pri_path.ackto >> 3; + qp_attr->retry_cnt = (be32_to_cpu(context->params1) >> 16) & 0x7; + qp_attr->rnr_retry = context->pri_path.rnr_retry >> 5; + qp_attr->alt_timeout = context->alt_path.ackto >> 3; + +done: + qp_attr->cur_qp_state = qp_attr->qp_state; + qp_attr->cap.max_send_wr = qp->sq.max; + qp_attr->cap.max_recv_wr = qp->rq.max; + qp_attr->cap.max_send_sge = qp->sq.max_gs; + qp_attr->cap.max_recv_sge = qp->rq.max_gs; + qp_attr->cap.max_inline_data = qp->max_inline_data; + + qp_init_attr->cap = qp_attr->cap; + qp_init_attr->sq_sig_type = qp->sq_policy; + +out_mailbox: + mthca_free_mailbox(dev, mailbox); + +out: + mutex_unlock(&qp->mutex); + return err; +} + +static int mthca_path_set(struct mthca_dev *dev, const struct rdma_ah_attr *ah, + struct mthca_qp_path *path, u8 port) +{ + path->g_mylmc = rdma_ah_get_path_bits(ah) & 0x7f; + path->rlid = cpu_to_be16(rdma_ah_get_dlid(ah)); + path->static_rate = mthca_get_rate(dev, rdma_ah_get_static_rate(ah), + port); + + if (rdma_ah_get_ah_flags(ah) & IB_AH_GRH) { + const struct ib_global_route *grh = rdma_ah_read_grh(ah); + + if (grh->sgid_index >= dev->limits.gid_table_len) { + mthca_dbg(dev, "sgid_index (%u) too large. max is %d\n", + grh->sgid_index, + dev->limits.gid_table_len - 1); + return -1; + } + + path->g_mylmc |= 1 << 7; + path->mgid_index = grh->sgid_index; + path->hop_limit = grh->hop_limit; + path->sl_tclass_flowlabel = + cpu_to_be32((rdma_ah_get_sl(ah) << 28) | + (grh->traffic_class << 20) | + (grh->flow_label)); + memcpy(path->rgid, grh->dgid.raw, 16); + } else { + path->sl_tclass_flowlabel = cpu_to_be32(rdma_ah_get_sl(ah) << + 28); + } + + return 0; +} + +static int __mthca_modify_qp(struct ib_qp *ibqp, + const struct ib_qp_attr *attr, int attr_mask, + enum ib_qp_state cur_state, + enum ib_qp_state new_state, + struct ib_udata *udata) +{ + struct mthca_dev *dev = to_mdev(ibqp->device); + struct mthca_qp *qp = to_mqp(ibqp); + struct mthca_ucontext *context = rdma_udata_to_drv_context( + udata, struct mthca_ucontext, ibucontext); + struct mthca_mailbox *mailbox; + struct mthca_qp_param *qp_param; + struct mthca_qp_context *qp_context; + u32 sqd_event = 0; + int err = -EINVAL; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) { + err = PTR_ERR(mailbox); + goto out; + } + qp_param = mailbox->buf; + qp_context = &qp_param->context; + memset(qp_param, 0, sizeof *qp_param); + + qp_context->flags = cpu_to_be32((to_mthca_state(new_state) << 28) | + (to_mthca_st(qp->transport) << 16)); + qp_context->flags |= cpu_to_be32(MTHCA_QP_BIT_DE); + if (!(attr_mask & IB_QP_PATH_MIG_STATE)) + qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11); + else { + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PM_STATE); + switch (attr->path_mig_state) { + case IB_MIG_MIGRATED: + qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11); + break; + case IB_MIG_REARM: + qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_REARM << 11); + break; + case IB_MIG_ARMED: + qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_ARMED << 11); + break; + } + } + + /* leave tavor_sched_queue as 0 */ + + if (qp->transport == MLX || qp->transport == UD) + qp_context->mtu_msgmax = (IB_MTU_2048 << 5) | 11; + else if (attr_mask & IB_QP_PATH_MTU) { + if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_2048) { + mthca_dbg(dev, "path MTU (%u) is invalid\n", + attr->path_mtu); + goto out_mailbox; + } + qp_context->mtu_msgmax = (attr->path_mtu << 5) | 31; + } + + if (mthca_is_memfree(dev)) { + if (qp->rq.max) + qp_context->rq_size_stride = ilog2(qp->rq.max) << 3; + qp_context->rq_size_stride |= qp->rq.wqe_shift - 4; + + if (qp->sq.max) + qp_context->sq_size_stride = ilog2(qp->sq.max) << 3; + qp_context->sq_size_stride |= qp->sq.wqe_shift - 4; + } + + /* leave arbel_sched_queue as 0 */ + + if (qp->ibqp.uobject) + qp_context->usr_page = cpu_to_be32(context->uar.index); + else + qp_context->usr_page = cpu_to_be32(dev->driver_uar.index); + qp_context->local_qpn = cpu_to_be32(qp->qpn); + if (attr_mask & IB_QP_DEST_QPN) { + qp_context->remote_qpn = cpu_to_be32(attr->dest_qp_num); + } + + if (qp->transport == MLX) + qp_context->pri_path.port_pkey |= + cpu_to_be32(qp->port << 24); + else { + if (attr_mask & IB_QP_PORT) { + qp_context->pri_path.port_pkey |= + cpu_to_be32(attr->port_num << 24); + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PORT_NUM); + } + } + + if (attr_mask & IB_QP_PKEY_INDEX) { + qp_context->pri_path.port_pkey |= + cpu_to_be32(attr->pkey_index); + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PKEY_INDEX); + } + + if (attr_mask & IB_QP_RNR_RETRY) { + qp_context->alt_path.rnr_retry = qp_context->pri_path.rnr_retry = + attr->rnr_retry << 5; + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_RETRY | + MTHCA_QP_OPTPAR_ALT_RNR_RETRY); + } + + if (attr_mask & IB_QP_AV) { + if (mthca_path_set(dev, &attr->ah_attr, &qp_context->pri_path, + attr_mask & IB_QP_PORT ? attr->port_num : qp->port)) + goto out_mailbox; + + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH); + } + + if (ibqp->qp_type == IB_QPT_RC && + cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) { + u8 sched_queue = ibqp->uobject ? 0x2 : 0x1; + + if (mthca_is_memfree(dev)) + qp_context->rlkey_arbel_sched_queue |= sched_queue; + else + qp_context->tavor_sched_queue |= cpu_to_be32(sched_queue); + + qp_param->opt_param_mask |= + cpu_to_be32(MTHCA_QP_OPTPAR_SCHED_QUEUE); + } + + if (attr_mask & IB_QP_TIMEOUT) { + qp_context->pri_path.ackto = attr->timeout << 3; + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ACK_TIMEOUT); + } + + if (attr_mask & IB_QP_ALT_PATH) { + if (attr->alt_pkey_index >= dev->limits.pkey_table_len) { + mthca_dbg(dev, "Alternate P_Key index (%u) too large. max is %d\n", + attr->alt_pkey_index, dev->limits.pkey_table_len-1); + goto out_mailbox; + } + + if (attr->alt_port_num == 0 || attr->alt_port_num > dev->limits.num_ports) { + mthca_dbg(dev, "Alternate port number (%u) is invalid\n", + attr->alt_port_num); + goto out_mailbox; + } + + if (mthca_path_set(dev, &attr->alt_ah_attr, &qp_context->alt_path, + rdma_ah_get_port_num(&attr->alt_ah_attr))) + goto out_mailbox; + + qp_context->alt_path.port_pkey |= cpu_to_be32(attr->alt_pkey_index | + attr->alt_port_num << 24); + qp_context->alt_path.ackto = attr->alt_timeout << 3; + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ALT_ADDR_PATH); + } + + /* leave rdd as 0 */ + qp_context->pd = cpu_to_be32(to_mpd(ibqp->pd)->pd_num); + /* leave wqe_base as 0 (we always create an MR based at 0 for WQs) */ + qp_context->wqe_lkey = cpu_to_be32(qp->mr.ibmr.lkey); + qp_context->params1 = cpu_to_be32((MTHCA_ACK_REQ_FREQ << 28) | + (MTHCA_FLIGHT_LIMIT << 24) | + MTHCA_QP_BIT_SWE); + if (qp->sq_policy == IB_SIGNAL_ALL_WR) + qp_context->params1 |= cpu_to_be32(MTHCA_QP_BIT_SSC); + if (attr_mask & IB_QP_RETRY_CNT) { + qp_context->params1 |= cpu_to_be32(attr->retry_cnt << 16); + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RETRY_COUNT); + } + + if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { + if (attr->max_rd_atomic) { + qp_context->params1 |= + cpu_to_be32(MTHCA_QP_BIT_SRE | + MTHCA_QP_BIT_SAE); + qp_context->params1 |= + cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); + } + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_SRA_MAX); + } + + if (attr_mask & IB_QP_SQ_PSN) + qp_context->next_send_psn = cpu_to_be32(attr->sq_psn); + qp_context->cqn_snd = cpu_to_be32(to_mcq(ibqp->send_cq)->cqn); + + if (mthca_is_memfree(dev)) { + qp_context->snd_wqe_base_l = cpu_to_be32(qp->send_wqe_offset); + qp_context->snd_db_index = cpu_to_be32(qp->sq.db_index); + } + + if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { + if (attr->max_dest_rd_atomic) + qp_context->params2 |= + cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); + + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RRA_MAX); + } + + if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) { + qp_context->params2 |= get_hw_access_flags(qp, attr, attr_mask); + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE | + MTHCA_QP_OPTPAR_RRE | + MTHCA_QP_OPTPAR_RAE); + } + + qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RSC); + + if (ibqp->srq) + qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RIC); + + if (attr_mask & IB_QP_MIN_RNR_TIMER) { + qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_TIMEOUT); + } + if (attr_mask & IB_QP_RQ_PSN) + qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); + + qp_context->ra_buff_indx = + cpu_to_be32(dev->qp_table.rdb_base + + ((qp->qpn & (dev->limits.num_qps - 1)) * MTHCA_RDB_ENTRY_SIZE << + dev->qp_table.rdb_shift)); + + qp_context->cqn_rcv = cpu_to_be32(to_mcq(ibqp->recv_cq)->cqn); + + if (mthca_is_memfree(dev)) + qp_context->rcv_db_index = cpu_to_be32(qp->rq.db_index); + + if (attr_mask & IB_QP_QKEY) { + qp_context->qkey = cpu_to_be32(attr->qkey); + qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_Q_KEY); + } + + if (ibqp->srq) + qp_context->srqn = cpu_to_be32(1 << 24 | + to_msrq(ibqp->srq)->srqn); + + if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && + attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && + attr->en_sqd_async_notify) + sqd_event = 1 << 31; + + err = mthca_MODIFY_QP(dev, cur_state, new_state, qp->qpn, 0, + mailbox, sqd_event); + if (err) { + mthca_warn(dev, "modify QP %d->%d returned %d.\n", + cur_state, new_state, err); + goto out_mailbox; + } + + qp->state = new_state; + if (attr_mask & IB_QP_ACCESS_FLAGS) + qp->atomic_rd_en = attr->qp_access_flags; + if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) + qp->resp_depth = attr->max_dest_rd_atomic; + if (attr_mask & IB_QP_PORT) + qp->port = attr->port_num; + if (attr_mask & IB_QP_ALT_PATH) + qp->alt_port = attr->alt_port_num; + + if (is_sqp(dev, qp)) + store_attrs(qp->sqp, attr, attr_mask); + + /* + * If we moved QP0 to RTR, bring the IB link up; if we moved + * QP0 to RESET or ERROR, bring the link back down. + */ + if (is_qp0(dev, qp)) { + if (cur_state != IB_QPS_RTR && + new_state == IB_QPS_RTR) + init_port(dev, qp->port); + + if (cur_state != IB_QPS_RESET && + cur_state != IB_QPS_ERR && + (new_state == IB_QPS_RESET || + new_state == IB_QPS_ERR)) + mthca_CLOSE_IB(dev, qp->port); + } + + /* + * If we moved a kernel QP to RESET, clean up all old CQ + * entries and reinitialize the QP. + */ + if (new_state == IB_QPS_RESET && !qp->ibqp.uobject) { + mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq), qp->qpn, + qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL); + if (qp->ibqp.send_cq != qp->ibqp.recv_cq) + mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq), qp->qpn, NULL); + + mthca_wq_reset(&qp->sq); + qp->sq.last = get_send_wqe(qp, qp->sq.max - 1); + + mthca_wq_reset(&qp->rq); + qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1); + + if (mthca_is_memfree(dev)) { + *qp->sq.db = 0; + *qp->rq.db = 0; + } + } + +out_mailbox: + mthca_free_mailbox(dev, mailbox); +out: + return err; +} + +int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, + struct ib_udata *udata) +{ + struct mthca_dev *dev = to_mdev(ibqp->device); + struct mthca_qp *qp = to_mqp(ibqp); + enum ib_qp_state cur_state, new_state; + int err = -EINVAL; + + mutex_lock(&qp->mutex); + if (attr_mask & IB_QP_CUR_STATE) { + cur_state = attr->cur_qp_state; + } else { + spin_lock_irq(&qp->sq.lock); + spin_lock(&qp->rq.lock); + cur_state = qp->state; + spin_unlock(&qp->rq.lock); + spin_unlock_irq(&qp->sq.lock); + } + + new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; + + if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, + attr_mask)) { + mthca_dbg(dev, "Bad QP transition (transport %d) " + "%d->%d with attr 0x%08x\n", + qp->transport, cur_state, new_state, + attr_mask); + goto out; + } + + if ((attr_mask & IB_QP_PKEY_INDEX) && + attr->pkey_index >= dev->limits.pkey_table_len) { + mthca_dbg(dev, "P_Key index (%u) too large. max is %d\n", + attr->pkey_index, dev->limits.pkey_table_len-1); + goto out; + } + + if ((attr_mask & IB_QP_PORT) && + (attr->port_num == 0 || attr->port_num > dev->limits.num_ports)) { + mthca_dbg(dev, "Port number (%u) is invalid\n", attr->port_num); + goto out; + } + + if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && + attr->max_rd_atomic > dev->limits.max_qp_init_rdma) { + mthca_dbg(dev, "Max rdma_atomic as initiator %u too large (max is %d)\n", + attr->max_rd_atomic, dev->limits.max_qp_init_rdma); + goto out; + } + + if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && + attr->max_dest_rd_atomic > 1 << dev->qp_table.rdb_shift) { + mthca_dbg(dev, "Max rdma_atomic as responder %u too large (max %d)\n", + attr->max_dest_rd_atomic, 1 << dev->qp_table.rdb_shift); + goto out; + } + + if (cur_state == new_state && cur_state == IB_QPS_RESET) { + err = 0; + goto out; + } + + err = __mthca_modify_qp(ibqp, attr, attr_mask, cur_state, new_state, + udata); + +out: + mutex_unlock(&qp->mutex); + return err; +} + +static int mthca_max_data_size(struct mthca_dev *dev, struct mthca_qp *qp, int desc_sz) +{ + /* + * Calculate the maximum size of WQE s/g segments, excluding + * the next segment and other non-data segments. + */ + int max_data_size = desc_sz - sizeof (struct mthca_next_seg); + + switch (qp->transport) { + case MLX: + max_data_size -= 2 * sizeof (struct mthca_data_seg); + break; + + case UD: + if (mthca_is_memfree(dev)) + max_data_size -= sizeof (struct mthca_arbel_ud_seg); + else + max_data_size -= sizeof (struct mthca_tavor_ud_seg); + break; + + default: + max_data_size -= sizeof (struct mthca_raddr_seg); + break; + } + + return max_data_size; +} + +static inline int mthca_max_inline_data(struct mthca_pd *pd, int max_data_size) +{ + /* We don't support inline data for kernel QPs (yet). */ + return pd->ibpd.uobject ? max_data_size - MTHCA_INLINE_HEADER_SIZE : 0; +} + +static void mthca_adjust_qp_caps(struct mthca_dev *dev, + struct mthca_pd *pd, + struct mthca_qp *qp) +{ + int max_data_size = mthca_max_data_size(dev, qp, + min(dev->limits.max_desc_sz, + 1 << qp->sq.wqe_shift)); + + qp->max_inline_data = mthca_max_inline_data(pd, max_data_size); + + qp->sq.max_gs = min_t(int, dev->limits.max_sg, + max_data_size / sizeof (struct mthca_data_seg)); + qp->rq.max_gs = min_t(int, dev->limits.max_sg, + (min(dev->limits.max_desc_sz, 1 << qp->rq.wqe_shift) - + sizeof (struct mthca_next_seg)) / + sizeof (struct mthca_data_seg)); +} + +/* + * Allocate and register buffer for WQEs. qp->rq.max, sq.max, + * rq.max_gs and sq.max_gs must all be assigned. + * mthca_alloc_wqe_buf will calculate rq.wqe_shift and + * sq.wqe_shift (as well as send_wqe_offset, is_direct, and + * queue) + */ +static int mthca_alloc_wqe_buf(struct mthca_dev *dev, + struct mthca_pd *pd, + struct mthca_qp *qp, + struct ib_udata *udata) +{ + int size; + int err = -ENOMEM; + + size = sizeof (struct mthca_next_seg) + + qp->rq.max_gs * sizeof (struct mthca_data_seg); + + if (size > dev->limits.max_desc_sz) + return -EINVAL; + + for (qp->rq.wqe_shift = 6; 1 << qp->rq.wqe_shift < size; + qp->rq.wqe_shift++) + ; /* nothing */ + + size = qp->sq.max_gs * sizeof (struct mthca_data_seg); + switch (qp->transport) { + case MLX: + size += 2 * sizeof (struct mthca_data_seg); + break; + + case UD: + size += mthca_is_memfree(dev) ? + sizeof (struct mthca_arbel_ud_seg) : + sizeof (struct mthca_tavor_ud_seg); + break; + + case UC: + size += sizeof (struct mthca_raddr_seg); + break; + + case RC: + size += sizeof (struct mthca_raddr_seg); + /* + * An atomic op will require an atomic segment, a + * remote address segment and one scatter entry. + */ + size = max_t(int, size, + sizeof (struct mthca_atomic_seg) + + sizeof (struct mthca_raddr_seg) + + sizeof (struct mthca_data_seg)); + break; + + default: + break; + } + + /* Make sure that we have enough space for a bind request */ + size = max_t(int, size, sizeof (struct mthca_bind_seg)); + + size += sizeof (struct mthca_next_seg); + + if (size > dev->limits.max_desc_sz) + return -EINVAL; + + for (qp->sq.wqe_shift = 6; 1 << qp->sq.wqe_shift < size; + qp->sq.wqe_shift++) + ; /* nothing */ + + qp->send_wqe_offset = ALIGN(qp->rq.max << qp->rq.wqe_shift, + 1 << qp->sq.wqe_shift); + + /* + * If this is a userspace QP, we don't actually have to + * allocate anything. All we need is to calculate the WQE + * sizes and the send_wqe_offset, so we're done now. + */ + if (udata) + return 0; + + size = PAGE_ALIGN(qp->send_wqe_offset + + (qp->sq.max << qp->sq.wqe_shift)); + + qp->wrid = kmalloc_array(qp->rq.max + qp->sq.max, sizeof(u64), + GFP_KERNEL); + if (!qp->wrid) + goto err_out; + + err = mthca_buf_alloc(dev, size, MTHCA_MAX_DIRECT_QP_SIZE, + &qp->queue, &qp->is_direct, pd, 0, &qp->mr); + if (err) + goto err_out; + + return 0; + +err_out: + kfree(qp->wrid); + return err; +} + +static void mthca_free_wqe_buf(struct mthca_dev *dev, + struct mthca_qp *qp) +{ + mthca_buf_free(dev, PAGE_ALIGN(qp->send_wqe_offset + + (qp->sq.max << qp->sq.wqe_shift)), + &qp->queue, qp->is_direct, &qp->mr); + kfree(qp->wrid); +} + +static int mthca_map_memfree(struct mthca_dev *dev, + struct mthca_qp *qp) +{ + int ret; + + if (mthca_is_memfree(dev)) { + ret = mthca_table_get(dev, dev->qp_table.qp_table, qp->qpn); + if (ret) + return ret; + + ret = mthca_table_get(dev, dev->qp_table.eqp_table, qp->qpn); + if (ret) + goto err_qpc; + + ret = mthca_table_get(dev, dev->qp_table.rdb_table, + qp->qpn << dev->qp_table.rdb_shift); + if (ret) + goto err_eqpc; + + } + + return 0; + +err_eqpc: + mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn); + +err_qpc: + mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn); + + return ret; +} + +static void mthca_unmap_memfree(struct mthca_dev *dev, + struct mthca_qp *qp) +{ + mthca_table_put(dev, dev->qp_table.rdb_table, + qp->qpn << dev->qp_table.rdb_shift); + mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn); + mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn); +} + +static int mthca_alloc_memfree(struct mthca_dev *dev, + struct mthca_qp *qp) +{ + if (mthca_is_memfree(dev)) { + qp->rq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_RQ, + qp->qpn, &qp->rq.db); + if (qp->rq.db_index < 0) + return -ENOMEM; + + qp->sq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SQ, + qp->qpn, &qp->sq.db); + if (qp->sq.db_index < 0) { + mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index); + return -ENOMEM; + } + } + + return 0; +} + +static void mthca_free_memfree(struct mthca_dev *dev, + struct mthca_qp *qp) +{ + if (mthca_is_memfree(dev)) { + mthca_free_db(dev, MTHCA_DB_TYPE_SQ, qp->sq.db_index); + mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index); + } +} + +static int mthca_alloc_qp_common(struct mthca_dev *dev, + struct mthca_pd *pd, + struct mthca_cq *send_cq, + struct mthca_cq *recv_cq, + enum ib_sig_type send_policy, + struct mthca_qp *qp, + struct ib_udata *udata) +{ + int ret; + int i; + struct mthca_next_seg *next; + + qp->refcount = 1; + init_waitqueue_head(&qp->wait); + mutex_init(&qp->mutex); + qp->state = IB_QPS_RESET; + qp->atomic_rd_en = 0; + qp->resp_depth = 0; + qp->sq_policy = send_policy; + mthca_wq_reset(&qp->sq); + mthca_wq_reset(&qp->rq); + + spin_lock_init(&qp->sq.lock); + spin_lock_init(&qp->rq.lock); + + ret = mthca_map_memfree(dev, qp); + if (ret) + return ret; + + ret = mthca_alloc_wqe_buf(dev, pd, qp, udata); + if (ret) { + mthca_unmap_memfree(dev, qp); + return ret; + } + + mthca_adjust_qp_caps(dev, pd, qp); + + /* + * If this is a userspace QP, we're done now. The doorbells + * will be allocated and buffers will be initialized in + * userspace. + */ + if (udata) + return 0; + + ret = mthca_alloc_memfree(dev, qp); + if (ret) { + mthca_free_wqe_buf(dev, qp); + mthca_unmap_memfree(dev, qp); + return ret; + } + + if (mthca_is_memfree(dev)) { + struct mthca_data_seg *scatter; + int size = (sizeof (struct mthca_next_seg) + + qp->rq.max_gs * sizeof (struct mthca_data_seg)) / 16; + + for (i = 0; i < qp->rq.max; ++i) { + next = get_recv_wqe(qp, i); + next->nda_op = cpu_to_be32(((i + 1) & (qp->rq.max - 1)) << + qp->rq.wqe_shift); + next->ee_nds = cpu_to_be32(size); + + for (scatter = (void *) (next + 1); + (void *) scatter < (void *) next + (1 << qp->rq.wqe_shift); + ++scatter) + scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY); + } + + for (i = 0; i < qp->sq.max; ++i) { + next = get_send_wqe(qp, i); + next->nda_op = cpu_to_be32((((i + 1) & (qp->sq.max - 1)) << + qp->sq.wqe_shift) + + qp->send_wqe_offset); + } + } else { + for (i = 0; i < qp->rq.max; ++i) { + next = get_recv_wqe(qp, i); + next->nda_op = htonl((((i + 1) % qp->rq.max) << + qp->rq.wqe_shift) | 1); + } + + } + + qp->sq.last = get_send_wqe(qp, qp->sq.max - 1); + qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1); + + return 0; +} + +static int mthca_set_qp_size(struct mthca_dev *dev, struct ib_qp_cap *cap, + struct mthca_pd *pd, struct mthca_qp *qp) +{ + int max_data_size = mthca_max_data_size(dev, qp, dev->limits.max_desc_sz); + + /* Sanity check QP size before proceeding */ + if (cap->max_send_wr > dev->limits.max_wqes || + cap->max_recv_wr > dev->limits.max_wqes || + cap->max_send_sge > dev->limits.max_sg || + cap->max_recv_sge > dev->limits.max_sg || + cap->max_inline_data > mthca_max_inline_data(pd, max_data_size)) + return -EINVAL; + + /* + * For MLX transport we need 2 extra send gather entries: + * one for the header and one for the checksum at the end + */ + if (qp->transport == MLX && cap->max_send_sge + 2 > dev->limits.max_sg) + return -EINVAL; + + if (mthca_is_memfree(dev)) { + qp->rq.max = cap->max_recv_wr ? + roundup_pow_of_two(cap->max_recv_wr) : 0; + qp->sq.max = cap->max_send_wr ? + roundup_pow_of_two(cap->max_send_wr) : 0; + } else { + qp->rq.max = cap->max_recv_wr; + qp->sq.max = cap->max_send_wr; + } + + qp->rq.max_gs = cap->max_recv_sge; + qp->sq.max_gs = max_t(int, cap->max_send_sge, + ALIGN(cap->max_inline_data + MTHCA_INLINE_HEADER_SIZE, + MTHCA_INLINE_CHUNK_SIZE) / + sizeof (struct mthca_data_seg)); + + return 0; +} + +int mthca_alloc_qp(struct mthca_dev *dev, + struct mthca_pd *pd, + struct mthca_cq *send_cq, + struct mthca_cq *recv_cq, + enum ib_qp_type type, + enum ib_sig_type send_policy, + struct ib_qp_cap *cap, + struct mthca_qp *qp, + struct ib_udata *udata) +{ + int err; + + switch (type) { + case IB_QPT_RC: qp->transport = RC; break; + case IB_QPT_UC: qp->transport = UC; break; + case IB_QPT_UD: qp->transport = UD; break; + default: return -EINVAL; + } + + err = mthca_set_qp_size(dev, cap, pd, qp); + if (err) + return err; + + qp->qpn = mthca_alloc(&dev->qp_table.alloc); + if (qp->qpn == -1) + return -ENOMEM; + + /* initialize port to zero for error-catching. */ + qp->port = 0; + + err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq, + send_policy, qp, udata); + if (err) { + mthca_free(&dev->qp_table.alloc, qp->qpn); + return err; + } + + spin_lock_irq(&dev->qp_table.lock); + mthca_array_set(&dev->qp_table.qp, + qp->qpn & (dev->limits.num_qps - 1), qp); + spin_unlock_irq(&dev->qp_table.lock); + + return 0; +} + +static void mthca_lock_cqs(struct mthca_cq *send_cq, struct mthca_cq *recv_cq) + __acquires(&send_cq->lock) __acquires(&recv_cq->lock) +{ + if (send_cq == recv_cq) { + spin_lock_irq(&send_cq->lock); + __acquire(&recv_cq->lock); + } else if (send_cq->cqn < recv_cq->cqn) { + spin_lock_irq(&send_cq->lock); + spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); + } else { + spin_lock_irq(&recv_cq->lock); + spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); + } +} + +static void mthca_unlock_cqs(struct mthca_cq *send_cq, struct mthca_cq *recv_cq) + __releases(&send_cq->lock) __releases(&recv_cq->lock) +{ + if (send_cq == recv_cq) { + __release(&recv_cq->lock); + spin_unlock_irq(&send_cq->lock); + } else if (send_cq->cqn < recv_cq->cqn) { + spin_unlock(&recv_cq->lock); + spin_unlock_irq(&send_cq->lock); + } else { + spin_unlock(&send_cq->lock); + spin_unlock_irq(&recv_cq->lock); + } +} + +int mthca_alloc_sqp(struct mthca_dev *dev, + struct mthca_pd *pd, + struct mthca_cq *send_cq, + struct mthca_cq *recv_cq, + enum ib_sig_type send_policy, + struct ib_qp_cap *cap, + int qpn, + int port, + struct mthca_qp *qp, + struct ib_udata *udata) +{ + u32 mqpn = qpn * 2 + dev->qp_table.sqp_start + port - 1; + int err; + + qp->transport = MLX; + err = mthca_set_qp_size(dev, cap, pd, qp); + if (err) + return err; + + qp->sqp->header_buf_size = qp->sq.max * MTHCA_UD_HEADER_SIZE; + qp->sqp->header_buf = + dma_alloc_coherent(&dev->pdev->dev, qp->sqp->header_buf_size, + &qp->sqp->header_dma, GFP_KERNEL); + if (!qp->sqp->header_buf) + return -ENOMEM; + + spin_lock_irq(&dev->qp_table.lock); + if (mthca_array_get(&dev->qp_table.qp, mqpn)) + err = -EBUSY; + else + mthca_array_set(&dev->qp_table.qp, mqpn, qp); + spin_unlock_irq(&dev->qp_table.lock); + + if (err) + goto err_out; + + qp->port = port; + qp->qpn = mqpn; + qp->transport = MLX; + + err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq, + send_policy, qp, udata); + if (err) + goto err_out_free; + + atomic_inc(&pd->sqp_count); + + return 0; + + err_out_free: + /* + * Lock CQs here, so that CQ polling code can do QP lookup + * without taking a lock. + */ + mthca_lock_cqs(send_cq, recv_cq); + + spin_lock(&dev->qp_table.lock); + mthca_array_clear(&dev->qp_table.qp, mqpn); + spin_unlock(&dev->qp_table.lock); + + mthca_unlock_cqs(send_cq, recv_cq); + +err_out: + dma_free_coherent(&dev->pdev->dev, qp->sqp->header_buf_size, + qp->sqp->header_buf, qp->sqp->header_dma); + return err; +} + +static inline int get_qp_refcount(struct mthca_dev *dev, struct mthca_qp *qp) +{ + int c; + + spin_lock_irq(&dev->qp_table.lock); + c = qp->refcount; + spin_unlock_irq(&dev->qp_table.lock); + + return c; +} + +void mthca_free_qp(struct mthca_dev *dev, + struct mthca_qp *qp) +{ + struct mthca_cq *send_cq; + struct mthca_cq *recv_cq; + + send_cq = to_mcq(qp->ibqp.send_cq); + recv_cq = to_mcq(qp->ibqp.recv_cq); + + /* + * Lock CQs here, so that CQ polling code can do QP lookup + * without taking a lock. + */ + mthca_lock_cqs(send_cq, recv_cq); + + spin_lock(&dev->qp_table.lock); + mthca_array_clear(&dev->qp_table.qp, + qp->qpn & (dev->limits.num_qps - 1)); + --qp->refcount; + spin_unlock(&dev->qp_table.lock); + + mthca_unlock_cqs(send_cq, recv_cq); + + wait_event(qp->wait, !get_qp_refcount(dev, qp)); + + if (qp->state != IB_QPS_RESET) + mthca_MODIFY_QP(dev, qp->state, IB_QPS_RESET, qp->qpn, 0, + NULL, 0); + + /* + * If this is a userspace QP, the buffers, MR, CQs and so on + * will be cleaned up in userspace, so all we have to do is + * unref the mem-free tables and free the QPN in our table. + */ + if (!qp->ibqp.uobject) { + mthca_cq_clean(dev, recv_cq, qp->qpn, + qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL); + if (send_cq != recv_cq) + mthca_cq_clean(dev, send_cq, qp->qpn, NULL); + + mthca_free_memfree(dev, qp); + mthca_free_wqe_buf(dev, qp); + } + + mthca_unmap_memfree(dev, qp); + + if (is_sqp(dev, qp)) { + atomic_dec(&(to_mpd(qp->ibqp.pd)->sqp_count)); + dma_free_coherent(&dev->pdev->dev, qp->sqp->header_buf_size, + qp->sqp->header_buf, qp->sqp->header_dma); + } else + mthca_free(&dev->qp_table.alloc, qp->qpn); +} + +/* Create UD header for an MLX send and build a data segment for it */ +static int build_mlx_header(struct mthca_dev *dev, struct mthca_qp *qp, int ind, + const struct ib_ud_wr *wr, + struct mthca_mlx_seg *mlx, + struct mthca_data_seg *data) +{ + struct mthca_sqp *sqp = qp->sqp; + int header_size; + int err; + u16 pkey; + + ib_ud_header_init(256, /* assume a MAD */ 1, 0, 0, + mthca_ah_grh_present(to_mah(wr->ah)), 0, 0, 0, + &sqp->ud_header); + + err = mthca_read_ah(dev, to_mah(wr->ah), &sqp->ud_header); + if (err) + return err; + mlx->flags &= ~cpu_to_be32(MTHCA_NEXT_SOLICIT | 1); + mlx->flags |= cpu_to_be32((!qp->ibqp.qp_num ? MTHCA_MLX_VL15 : 0) | + (sqp->ud_header.lrh.destination_lid == + IB_LID_PERMISSIVE ? MTHCA_MLX_SLR : 0) | + (sqp->ud_header.lrh.service_level << 8)); + mlx->rlid = sqp->ud_header.lrh.destination_lid; + mlx->vcrc = 0; + + switch (wr->wr.opcode) { + case IB_WR_SEND: + sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; + sqp->ud_header.immediate_present = 0; + break; + case IB_WR_SEND_WITH_IMM: + sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; + sqp->ud_header.immediate_present = 1; + sqp->ud_header.immediate_data = wr->wr.ex.imm_data; + break; + default: + return -EINVAL; + } + + sqp->ud_header.lrh.virtual_lane = !qp->ibqp.qp_num ? 15 : 0; + if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE) + sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE; + sqp->ud_header.bth.solicited_event = !!(wr->wr.send_flags & IB_SEND_SOLICITED); + if (!qp->ibqp.qp_num) + ib_get_cached_pkey(&dev->ib_dev, qp->port, sqp->pkey_index, + &pkey); + else + ib_get_cached_pkey(&dev->ib_dev, qp->port, wr->pkey_index, + &pkey); + sqp->ud_header.bth.pkey = cpu_to_be16(pkey); + sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->remote_qpn); + sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); + sqp->ud_header.deth.qkey = cpu_to_be32(wr->remote_qkey & 0x80000000 ? + sqp->qkey : wr->remote_qkey); + sqp->ud_header.deth.source_qpn = cpu_to_be32(qp->ibqp.qp_num); + + header_size = ib_ud_header_pack(&sqp->ud_header, + sqp->header_buf + + ind * MTHCA_UD_HEADER_SIZE); + + data->byte_count = cpu_to_be32(header_size); + data->lkey = cpu_to_be32(to_mpd(qp->ibqp.pd)->ntmr.ibmr.lkey); + data->addr = cpu_to_be64(sqp->header_dma + + ind * MTHCA_UD_HEADER_SIZE); + + return 0; +} + +static inline int mthca_wq_overflow(struct mthca_wq *wq, int nreq, + struct ib_cq *ib_cq) +{ + unsigned cur; + struct mthca_cq *cq; + + cur = wq->head - wq->tail; + if (likely(cur + nreq < wq->max)) + return 0; + + cq = to_mcq(ib_cq); + spin_lock(&cq->lock); + cur = wq->head - wq->tail; + spin_unlock(&cq->lock); + + return cur + nreq >= wq->max; +} + +static __always_inline void set_raddr_seg(struct mthca_raddr_seg *rseg, + u64 remote_addr, u32 rkey) +{ + rseg->raddr = cpu_to_be64(remote_addr); + rseg->rkey = cpu_to_be32(rkey); + rseg->reserved = 0; +} + +static __always_inline void set_atomic_seg(struct mthca_atomic_seg *aseg, + const struct ib_atomic_wr *wr) +{ + if (wr->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP) { + aseg->swap_add = cpu_to_be64(wr->swap); + aseg->compare = cpu_to_be64(wr->compare_add); + } else { + aseg->swap_add = cpu_to_be64(wr->compare_add); + aseg->compare = 0; + } + +} + +static void set_tavor_ud_seg(struct mthca_tavor_ud_seg *useg, + const struct ib_ud_wr *wr) +{ + useg->lkey = cpu_to_be32(to_mah(wr->ah)->key); + useg->av_addr = cpu_to_be64(to_mah(wr->ah)->avdma); + useg->dqpn = cpu_to_be32(wr->remote_qpn); + useg->qkey = cpu_to_be32(wr->remote_qkey); + +} + +static void set_arbel_ud_seg(struct mthca_arbel_ud_seg *useg, + const struct ib_ud_wr *wr) +{ + memcpy(useg->av, to_mah(wr->ah)->av, MTHCA_AV_SIZE); + useg->dqpn = cpu_to_be32(wr->remote_qpn); + useg->qkey = cpu_to_be32(wr->remote_qkey); +} + +int mthca_tavor_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) +{ + struct mthca_dev *dev = to_mdev(ibqp->device); + struct mthca_qp *qp = to_mqp(ibqp); + void *wqe; + void *prev_wqe; + unsigned long flags; + int err = 0; + int nreq; + int i; + int size; + /* + * f0 and size0 are only used if nreq != 0, and they will + * always be initialized the first time through the main loop + * before nreq is incremented. So nreq cannot become non-zero + * without initializing f0 and size0, and they are in fact + * never used uninitialized. + */ + int size0; + u32 f0; + int ind; + u8 op0 = 0; + + spin_lock_irqsave(&qp->sq.lock, flags); + + /* XXX check that state is OK to post send */ + + ind = qp->sq.next_ind; + + for (nreq = 0; wr; ++nreq, wr = wr->next) { + if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) { + mthca_err(dev, "SQ %06x full (%u head, %u tail," + " %d max, %d nreq)\n", qp->qpn, + qp->sq.head, qp->sq.tail, + qp->sq.max, nreq); + err = -ENOMEM; + *bad_wr = wr; + goto out; + } + + wqe = get_send_wqe(qp, ind); + prev_wqe = qp->sq.last; + qp->sq.last = wqe; + + ((struct mthca_next_seg *) wqe)->nda_op = 0; + ((struct mthca_next_seg *) wqe)->ee_nds = 0; + ((struct mthca_next_seg *) wqe)->flags = + ((wr->send_flags & IB_SEND_SIGNALED) ? + cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) | + ((wr->send_flags & IB_SEND_SOLICITED) ? + cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0) | + cpu_to_be32(1); + if (wr->opcode == IB_WR_SEND_WITH_IMM || + wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) + ((struct mthca_next_seg *) wqe)->imm = wr->ex.imm_data; + + wqe += sizeof (struct mthca_next_seg); + size = sizeof (struct mthca_next_seg) / 16; + + switch (qp->transport) { + case RC: + switch (wr->opcode) { + case IB_WR_ATOMIC_CMP_AND_SWP: + case IB_WR_ATOMIC_FETCH_AND_ADD: + set_raddr_seg(wqe, atomic_wr(wr)->remote_addr, + atomic_wr(wr)->rkey); + wqe += sizeof (struct mthca_raddr_seg); + + set_atomic_seg(wqe, atomic_wr(wr)); + wqe += sizeof (struct mthca_atomic_seg); + size += (sizeof (struct mthca_raddr_seg) + + sizeof (struct mthca_atomic_seg)) / 16; + break; + + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + case IB_WR_RDMA_READ: + set_raddr_seg(wqe, rdma_wr(wr)->remote_addr, + rdma_wr(wr)->rkey); + wqe += sizeof (struct mthca_raddr_seg); + size += sizeof (struct mthca_raddr_seg) / 16; + break; + + default: + /* No extra segments required for sends */ + break; + } + + break; + + case UC: + switch (wr->opcode) { + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + set_raddr_seg(wqe, rdma_wr(wr)->remote_addr, + rdma_wr(wr)->rkey); + wqe += sizeof (struct mthca_raddr_seg); + size += sizeof (struct mthca_raddr_seg) / 16; + break; + + default: + /* No extra segments required for sends */ + break; + } + + break; + + case UD: + set_tavor_ud_seg(wqe, ud_wr(wr)); + wqe += sizeof (struct mthca_tavor_ud_seg); + size += sizeof (struct mthca_tavor_ud_seg) / 16; + break; + + case MLX: + err = build_mlx_header( + dev, qp, ind, ud_wr(wr), + wqe - sizeof(struct mthca_next_seg), wqe); + if (err) { + *bad_wr = wr; + goto out; + } + wqe += sizeof (struct mthca_data_seg); + size += sizeof (struct mthca_data_seg) / 16; + break; + } + + if (wr->num_sge > qp->sq.max_gs) { + mthca_err(dev, "too many gathers\n"); + err = -EINVAL; + *bad_wr = wr; + goto out; + } + + for (i = 0; i < wr->num_sge; ++i) { + mthca_set_data_seg(wqe, wr->sg_list + i); + wqe += sizeof (struct mthca_data_seg); + size += sizeof (struct mthca_data_seg) / 16; + } + + /* Add one more inline data segment for ICRC */ + if (qp->transport == MLX) { + ((struct mthca_data_seg *) wqe)->byte_count = + cpu_to_be32((1 << 31) | 4); + ((u32 *) wqe)[1] = 0; + wqe += sizeof (struct mthca_data_seg); + size += sizeof (struct mthca_data_seg) / 16; + } + + qp->wrid[ind + qp->rq.max] = wr->wr_id; + + if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) { + mthca_err(dev, "opcode invalid\n"); + err = -EINVAL; + *bad_wr = wr; + goto out; + } + + ((struct mthca_next_seg *) prev_wqe)->nda_op = + cpu_to_be32(((ind << qp->sq.wqe_shift) + + qp->send_wqe_offset) | + mthca_opcode[wr->opcode]); + wmb(); + ((struct mthca_next_seg *) prev_wqe)->ee_nds = + cpu_to_be32((nreq ? 0 : MTHCA_NEXT_DBD) | size | + ((wr->send_flags & IB_SEND_FENCE) ? + MTHCA_NEXT_FENCE : 0)); + + if (!nreq) { + size0 = size; + op0 = mthca_opcode[wr->opcode]; + f0 = wr->send_flags & IB_SEND_FENCE ? + MTHCA_SEND_DOORBELL_FENCE : 0; + } + + ++ind; + if (unlikely(ind >= qp->sq.max)) + ind -= qp->sq.max; + } + +out: + if (likely(nreq)) { + wmb(); + + mthca_write64(((qp->sq.next_ind << qp->sq.wqe_shift) + + qp->send_wqe_offset) | f0 | op0, + (qp->qpn << 8) | size0, + dev->kar + MTHCA_SEND_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); + } + + qp->sq.next_ind = ind; + qp->sq.head += nreq; + + spin_unlock_irqrestore(&qp->sq.lock, flags); + return err; +} + +int mthca_tavor_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + struct mthca_dev *dev = to_mdev(ibqp->device); + struct mthca_qp *qp = to_mqp(ibqp); + unsigned long flags; + int err = 0; + int nreq; + int i; + int size; + /* + * size0 is only used if nreq != 0, and it will always be + * initialized the first time through the main loop before + * nreq is incremented. So nreq cannot become non-zero + * without initializing size0, and it is in fact never used + * uninitialized. + */ + int size0; + int ind; + void *wqe; + void *prev_wqe; + + spin_lock_irqsave(&qp->rq.lock, flags); + + /* XXX check that state is OK to post receive */ + + ind = qp->rq.next_ind; + + for (nreq = 0; wr; wr = wr->next) { + if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { + mthca_err(dev, "RQ %06x full (%u head, %u tail," + " %d max, %d nreq)\n", qp->qpn, + qp->rq.head, qp->rq.tail, + qp->rq.max, nreq); + err = -ENOMEM; + *bad_wr = wr; + goto out; + } + + wqe = get_recv_wqe(qp, ind); + prev_wqe = qp->rq.last; + qp->rq.last = wqe; + + ((struct mthca_next_seg *) wqe)->ee_nds = + cpu_to_be32(MTHCA_NEXT_DBD); + ((struct mthca_next_seg *) wqe)->flags = 0; + + wqe += sizeof (struct mthca_next_seg); + size = sizeof (struct mthca_next_seg) / 16; + + if (unlikely(wr->num_sge > qp->rq.max_gs)) { + err = -EINVAL; + *bad_wr = wr; + goto out; + } + + for (i = 0; i < wr->num_sge; ++i) { + mthca_set_data_seg(wqe, wr->sg_list + i); + wqe += sizeof (struct mthca_data_seg); + size += sizeof (struct mthca_data_seg) / 16; + } + + qp->wrid[ind] = wr->wr_id; + + ((struct mthca_next_seg *) prev_wqe)->ee_nds = + cpu_to_be32(MTHCA_NEXT_DBD | size); + + if (!nreq) + size0 = size; + + ++ind; + if (unlikely(ind >= qp->rq.max)) + ind -= qp->rq.max; + + ++nreq; + if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) { + nreq = 0; + + wmb(); + + mthca_write64((qp->rq.next_ind << qp->rq.wqe_shift) | size0, + qp->qpn << 8, dev->kar + MTHCA_RECEIVE_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); + + qp->rq.next_ind = ind; + qp->rq.head += MTHCA_TAVOR_MAX_WQES_PER_RECV_DB; + } + } + +out: + if (likely(nreq)) { + wmb(); + + mthca_write64((qp->rq.next_ind << qp->rq.wqe_shift) | size0, + qp->qpn << 8 | nreq, dev->kar + MTHCA_RECEIVE_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); + } + + qp->rq.next_ind = ind; + qp->rq.head += nreq; + + spin_unlock_irqrestore(&qp->rq.lock, flags); + return err; +} + +int mthca_arbel_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) +{ + struct mthca_dev *dev = to_mdev(ibqp->device); + struct mthca_qp *qp = to_mqp(ibqp); + u32 dbhi; + void *wqe; + void *prev_wqe; + unsigned long flags; + int err = 0; + int nreq; + int i; + int size; + /* + * f0 and size0 are only used if nreq != 0, and they will + * always be initialized the first time through the main loop + * before nreq is incremented. So nreq cannot become non-zero + * without initializing f0 and size0, and they are in fact + * never used uninitialized. + */ + int size0; + u32 f0; + int ind; + u8 op0 = 0; + + spin_lock_irqsave(&qp->sq.lock, flags); + + /* XXX check that state is OK to post send */ + + ind = qp->sq.head & (qp->sq.max - 1); + + for (nreq = 0; wr; ++nreq, wr = wr->next) { + if (unlikely(nreq == MTHCA_ARBEL_MAX_WQES_PER_SEND_DB)) { + nreq = 0; + + dbhi = (MTHCA_ARBEL_MAX_WQES_PER_SEND_DB << 24) | + ((qp->sq.head & 0xffff) << 8) | f0 | op0; + + qp->sq.head += MTHCA_ARBEL_MAX_WQES_PER_SEND_DB; + + /* + * Make sure that descriptors are written before + * doorbell record. + */ + wmb(); + *qp->sq.db = cpu_to_be32(qp->sq.head & 0xffff); + + /* + * Make sure doorbell record is written before we + * write MMIO send doorbell. + */ + wmb(); + + mthca_write64(dbhi, (qp->qpn << 8) | size0, + dev->kar + MTHCA_SEND_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); + } + + if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) { + mthca_err(dev, "SQ %06x full (%u head, %u tail," + " %d max, %d nreq)\n", qp->qpn, + qp->sq.head, qp->sq.tail, + qp->sq.max, nreq); + err = -ENOMEM; + *bad_wr = wr; + goto out; + } + + wqe = get_send_wqe(qp, ind); + prev_wqe = qp->sq.last; + qp->sq.last = wqe; + + ((struct mthca_next_seg *) wqe)->flags = + ((wr->send_flags & IB_SEND_SIGNALED) ? + cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) | + ((wr->send_flags & IB_SEND_SOLICITED) ? + cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0) | + ((wr->send_flags & IB_SEND_IP_CSUM) ? + cpu_to_be32(MTHCA_NEXT_IP_CSUM | MTHCA_NEXT_TCP_UDP_CSUM) : 0) | + cpu_to_be32(1); + if (wr->opcode == IB_WR_SEND_WITH_IMM || + wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) + ((struct mthca_next_seg *) wqe)->imm = wr->ex.imm_data; + + wqe += sizeof (struct mthca_next_seg); + size = sizeof (struct mthca_next_seg) / 16; + + switch (qp->transport) { + case RC: + switch (wr->opcode) { + case IB_WR_ATOMIC_CMP_AND_SWP: + case IB_WR_ATOMIC_FETCH_AND_ADD: + set_raddr_seg(wqe, atomic_wr(wr)->remote_addr, + atomic_wr(wr)->rkey); + wqe += sizeof (struct mthca_raddr_seg); + + set_atomic_seg(wqe, atomic_wr(wr)); + wqe += sizeof (struct mthca_atomic_seg); + size += (sizeof (struct mthca_raddr_seg) + + sizeof (struct mthca_atomic_seg)) / 16; + break; + + case IB_WR_RDMA_READ: + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + set_raddr_seg(wqe, rdma_wr(wr)->remote_addr, + rdma_wr(wr)->rkey); + wqe += sizeof (struct mthca_raddr_seg); + size += sizeof (struct mthca_raddr_seg) / 16; + break; + + default: + /* No extra segments required for sends */ + break; + } + + break; + + case UC: + switch (wr->opcode) { + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + set_raddr_seg(wqe, rdma_wr(wr)->remote_addr, + rdma_wr(wr)->rkey); + wqe += sizeof (struct mthca_raddr_seg); + size += sizeof (struct mthca_raddr_seg) / 16; + break; + + default: + /* No extra segments required for sends */ + break; + } + + break; + + case UD: + set_arbel_ud_seg(wqe, ud_wr(wr)); + wqe += sizeof (struct mthca_arbel_ud_seg); + size += sizeof (struct mthca_arbel_ud_seg) / 16; + break; + + case MLX: + err = build_mlx_header( + dev, qp, ind, ud_wr(wr), + wqe - sizeof(struct mthca_next_seg), wqe); + if (err) { + *bad_wr = wr; + goto out; + } + wqe += sizeof (struct mthca_data_seg); + size += sizeof (struct mthca_data_seg) / 16; + break; + } + + if (wr->num_sge > qp->sq.max_gs) { + mthca_err(dev, "too many gathers\n"); + err = -EINVAL; + *bad_wr = wr; + goto out; + } + + for (i = 0; i < wr->num_sge; ++i) { + mthca_set_data_seg(wqe, wr->sg_list + i); + wqe += sizeof (struct mthca_data_seg); + size += sizeof (struct mthca_data_seg) / 16; + } + + /* Add one more inline data segment for ICRC */ + if (qp->transport == MLX) { + ((struct mthca_data_seg *) wqe)->byte_count = + cpu_to_be32((1 << 31) | 4); + ((u32 *) wqe)[1] = 0; + wqe += sizeof (struct mthca_data_seg); + size += sizeof (struct mthca_data_seg) / 16; + } + + qp->wrid[ind + qp->rq.max] = wr->wr_id; + + if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) { + mthca_err(dev, "opcode invalid\n"); + err = -EINVAL; + *bad_wr = wr; + goto out; + } + + ((struct mthca_next_seg *) prev_wqe)->nda_op = + cpu_to_be32(((ind << qp->sq.wqe_shift) + + qp->send_wqe_offset) | + mthca_opcode[wr->opcode]); + wmb(); + ((struct mthca_next_seg *) prev_wqe)->ee_nds = + cpu_to_be32(MTHCA_NEXT_DBD | size | + ((wr->send_flags & IB_SEND_FENCE) ? + MTHCA_NEXT_FENCE : 0)); + + if (!nreq) { + size0 = size; + op0 = mthca_opcode[wr->opcode]; + f0 = wr->send_flags & IB_SEND_FENCE ? + MTHCA_SEND_DOORBELL_FENCE : 0; + } + + ++ind; + if (unlikely(ind >= qp->sq.max)) + ind -= qp->sq.max; + } + +out: + if (likely(nreq)) { + dbhi = (nreq << 24) | ((qp->sq.head & 0xffff) << 8) | f0 | op0; + + qp->sq.head += nreq; + + /* + * Make sure that descriptors are written before + * doorbell record. + */ + wmb(); + *qp->sq.db = cpu_to_be32(qp->sq.head & 0xffff); + + /* + * Make sure doorbell record is written before we + * write MMIO send doorbell. + */ + wmb(); + + mthca_write64(dbhi, (qp->qpn << 8) | size0, dev->kar + MTHCA_SEND_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); + } + + spin_unlock_irqrestore(&qp->sq.lock, flags); + return err; +} + +int mthca_arbel_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + struct mthca_dev *dev = to_mdev(ibqp->device); + struct mthca_qp *qp = to_mqp(ibqp); + unsigned long flags; + int err = 0; + int nreq; + int ind; + int i; + void *wqe; + + spin_lock_irqsave(&qp->rq.lock, flags); + + /* XXX check that state is OK to post receive */ + + ind = qp->rq.head & (qp->rq.max - 1); + + for (nreq = 0; wr; ++nreq, wr = wr->next) { + if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { + mthca_err(dev, "RQ %06x full (%u head, %u tail," + " %d max, %d nreq)\n", qp->qpn, + qp->rq.head, qp->rq.tail, + qp->rq.max, nreq); + err = -ENOMEM; + *bad_wr = wr; + goto out; + } + + wqe = get_recv_wqe(qp, ind); + + ((struct mthca_next_seg *) wqe)->flags = 0; + + wqe += sizeof (struct mthca_next_seg); + + if (unlikely(wr->num_sge > qp->rq.max_gs)) { + err = -EINVAL; + *bad_wr = wr; + goto out; + } + + for (i = 0; i < wr->num_sge; ++i) { + mthca_set_data_seg(wqe, wr->sg_list + i); + wqe += sizeof (struct mthca_data_seg); + } + + if (i < qp->rq.max_gs) + mthca_set_data_seg_inval(wqe); + + qp->wrid[ind] = wr->wr_id; + + ++ind; + if (unlikely(ind >= qp->rq.max)) + ind -= qp->rq.max; + } +out: + if (likely(nreq)) { + qp->rq.head += nreq; + + /* + * Make sure that descriptors are written before + * doorbell record. + */ + wmb(); + *qp->rq.db = cpu_to_be32(qp->rq.head & 0xffff); + } + + spin_unlock_irqrestore(&qp->rq.lock, flags); + return err; +} + +void mthca_free_err_wqe(struct mthca_dev *dev, struct mthca_qp *qp, int is_send, + int index, int *dbd, __be32 *new_wqe) +{ + struct mthca_next_seg *next; + + /* + * For SRQs, all receive WQEs generate a CQE, so we're always + * at the end of the doorbell chain. + */ + if (qp->ibqp.srq && !is_send) { + *new_wqe = 0; + return; + } + + if (is_send) + next = get_send_wqe(qp, index); + else + next = get_recv_wqe(qp, index); + + *dbd = !!(next->ee_nds & cpu_to_be32(MTHCA_NEXT_DBD)); + if (next->ee_nds & cpu_to_be32(0x3f)) + *new_wqe = (next->nda_op & cpu_to_be32(~0x3f)) | + (next->ee_nds & cpu_to_be32(0x3f)); + else + *new_wqe = 0; +} + +int mthca_init_qp_table(struct mthca_dev *dev) +{ + int err; + int i; + + spin_lock_init(&dev->qp_table.lock); + + /* + * We reserve 2 extra QPs per port for the special QPs. The + * special QP for port 1 has to be even, so round up. + */ + dev->qp_table.sqp_start = (dev->limits.reserved_qps + 1) & ~1UL; + err = mthca_alloc_init(&dev->qp_table.alloc, + dev->limits.num_qps, + (1 << 24) - 1, + dev->qp_table.sqp_start + + MTHCA_MAX_PORTS * 2); + if (err) + return err; + + err = mthca_array_init(&dev->qp_table.qp, + dev->limits.num_qps); + if (err) { + mthca_alloc_cleanup(&dev->qp_table.alloc); + return err; + } + + for (i = 0; i < 2; ++i) { + err = mthca_CONF_SPECIAL_QP(dev, i ? IB_QPT_GSI : IB_QPT_SMI, + dev->qp_table.sqp_start + i * 2); + if (err) { + mthca_warn(dev, "CONF_SPECIAL_QP returned " + "%d, aborting.\n", err); + goto err_out; + } + } + return 0; + + err_out: + for (i = 0; i < 2; ++i) + mthca_CONF_SPECIAL_QP(dev, i, 0); + + mthca_array_cleanup(&dev->qp_table.qp, dev->limits.num_qps); + mthca_alloc_cleanup(&dev->qp_table.alloc); + + return err; +} + +void mthca_cleanup_qp_table(struct mthca_dev *dev) +{ + int i; + + for (i = 0; i < 2; ++i) + mthca_CONF_SPECIAL_QP(dev, i, 0); + + mthca_array_cleanup(&dev->qp_table.qp, dev->limits.num_qps); + mthca_alloc_cleanup(&dev->qp_table.alloc); +} diff --git a/drivers/infiniband/hw/mthca/mthca_reset.c b/drivers/infiniband/hw/mthca/mthca_reset.c new file mode 100644 index 000000000..2a6979e4a --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_reset.c @@ -0,0 +1,282 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/errno.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/slab.h> + +#include "mthca_dev.h" +#include "mthca_cmd.h" + +int mthca_reset(struct mthca_dev *mdev) +{ + int i; + int err = 0; + u32 *hca_header = NULL; + u32 *bridge_header = NULL; + struct pci_dev *bridge = NULL; + int bridge_pcix_cap = 0; + int hca_pcie_cap = 0; + int hca_pcix_cap = 0; + + u16 devctl; + u16 linkctl; + +#define MTHCA_RESET_OFFSET 0xf0010 +#define MTHCA_RESET_VALUE swab32(1) + + /* + * Reset the chip. This is somewhat ugly because we have to + * save off the PCI header before reset and then restore it + * after the chip reboots. We skip config space offsets 22 + * and 23 since those have a special meaning. + * + * To make matters worse, for Tavor (PCI-X HCA) we have to + * find the associated bridge device and save off its PCI + * header as well. + */ + + if (!(mdev->mthca_flags & MTHCA_FLAG_PCIE)) { + /* Look for the bridge -- its device ID will be 2 more + than HCA's device ID. */ + while ((bridge = pci_get_device(mdev->pdev->vendor, + mdev->pdev->device + 2, + bridge)) != NULL) { + if (bridge->hdr_type == PCI_HEADER_TYPE_BRIDGE && + bridge->subordinate == mdev->pdev->bus) { + mthca_dbg(mdev, "Found bridge: %s\n", + pci_name(bridge)); + break; + } + } + + if (!bridge) { + /* + * Didn't find a bridge for a Tavor device -- + * assume we're in no-bridge mode and hope for + * the best. + */ + mthca_warn(mdev, "No bridge found for %s\n", + pci_name(mdev->pdev)); + } + + } + + /* For Arbel do we need to save off the full 4K PCI Express header?? */ + hca_header = kmalloc(256, GFP_KERNEL); + if (!hca_header) { + err = -ENOMEM; + goto put_dev; + } + + for (i = 0; i < 64; ++i) { + if (i == 22 || i == 23) + continue; + if (pci_read_config_dword(mdev->pdev, i * 4, hca_header + i)) { + err = -ENODEV; + mthca_err(mdev, "Couldn't save HCA " + "PCI header, aborting.\n"); + goto free_hca; + } + } + + hca_pcix_cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX); + hca_pcie_cap = pci_pcie_cap(mdev->pdev); + + if (bridge) { + bridge_header = kmalloc(256, GFP_KERNEL); + if (!bridge_header) { + err = -ENOMEM; + goto free_hca; + } + + for (i = 0; i < 64; ++i) { + if (i == 22 || i == 23) + continue; + if (pci_read_config_dword(bridge, i * 4, bridge_header + i)) { + err = -ENODEV; + mthca_err(mdev, "Couldn't save HCA bridge " + "PCI header, aborting.\n"); + goto free_bh; + } + } + bridge_pcix_cap = pci_find_capability(bridge, PCI_CAP_ID_PCIX); + if (!bridge_pcix_cap) { + err = -ENODEV; + mthca_err(mdev, "Couldn't locate HCA bridge " + "PCI-X capability, aborting.\n"); + goto free_bh; + } + } + + /* actually hit reset */ + { + void __iomem *reset = ioremap(pci_resource_start(mdev->pdev, 0) + + MTHCA_RESET_OFFSET, 4); + + if (!reset) { + err = -ENOMEM; + mthca_err(mdev, "Couldn't map HCA reset register, " + "aborting.\n"); + goto free_bh; + } + + writel(MTHCA_RESET_VALUE, reset); + iounmap(reset); + } + + /* Docs say to wait one second before accessing device */ + msleep(1000); + + /* Now wait for PCI device to start responding again */ + { + u32 v; + int c = 0; + + for (c = 0; c < 100; ++c) { + if (pci_read_config_dword(bridge ? bridge : mdev->pdev, 0, &v)) { + err = -ENODEV; + mthca_err(mdev, "Couldn't access HCA after reset, " + "aborting.\n"); + goto free_bh; + } + + if (v != 0xffffffff) + goto good; + + msleep(100); + } + + err = -ENODEV; + mthca_err(mdev, "PCI device did not come back after reset, " + "aborting.\n"); + goto free_bh; + } + +good: + /* Now restore the PCI headers */ + if (bridge) { + if (pci_write_config_dword(bridge, bridge_pcix_cap + 0x8, + bridge_header[(bridge_pcix_cap + 0x8) / 4])) { + err = -ENODEV; + mthca_err(mdev, "Couldn't restore HCA bridge Upstream " + "split transaction control, aborting.\n"); + goto free_bh; + } + if (pci_write_config_dword(bridge, bridge_pcix_cap + 0xc, + bridge_header[(bridge_pcix_cap + 0xc) / 4])) { + err = -ENODEV; + mthca_err(mdev, "Couldn't restore HCA bridge Downstream " + "split transaction control, aborting.\n"); + goto free_bh; + } + /* + * Bridge control register is at 0x3e, so we'll + * naturally restore it last in this loop. + */ + for (i = 0; i < 16; ++i) { + if (i * 4 == PCI_COMMAND) + continue; + + if (pci_write_config_dword(bridge, i * 4, bridge_header[i])) { + err = -ENODEV; + mthca_err(mdev, "Couldn't restore HCA bridge reg %x, " + "aborting.\n", i); + goto free_bh; + } + } + + if (pci_write_config_dword(bridge, PCI_COMMAND, + bridge_header[PCI_COMMAND / 4])) { + err = -ENODEV; + mthca_err(mdev, "Couldn't restore HCA bridge COMMAND, " + "aborting.\n"); + goto free_bh; + } + } + + if (hca_pcix_cap) { + if (pci_write_config_dword(mdev->pdev, hca_pcix_cap, + hca_header[hca_pcix_cap / 4])) { + err = -ENODEV; + mthca_err(mdev, "Couldn't restore HCA PCI-X " + "command register, aborting.\n"); + goto free_bh; + } + } + + if (hca_pcie_cap) { + devctl = hca_header[(hca_pcie_cap + PCI_EXP_DEVCTL) / 4]; + if (pcie_capability_write_word(mdev->pdev, PCI_EXP_DEVCTL, + devctl)) { + err = -ENODEV; + mthca_err(mdev, "Couldn't restore HCA PCI Express " + "Device Control register, aborting.\n"); + goto free_bh; + } + linkctl = hca_header[(hca_pcie_cap + PCI_EXP_LNKCTL) / 4]; + if (pcie_capability_write_word(mdev->pdev, PCI_EXP_LNKCTL, + linkctl)) { + err = -ENODEV; + mthca_err(mdev, "Couldn't restore HCA PCI Express " + "Link control register, aborting.\n"); + goto free_bh; + } + } + + for (i = 0; i < 16; ++i) { + if (i * 4 == PCI_COMMAND) + continue; + + if (pci_write_config_dword(mdev->pdev, i * 4, hca_header[i])) { + err = -ENODEV; + mthca_err(mdev, "Couldn't restore HCA reg %x, " + "aborting.\n", i); + goto free_bh; + } + } + + if (pci_write_config_dword(mdev->pdev, PCI_COMMAND, + hca_header[PCI_COMMAND / 4])) { + err = -ENODEV; + mthca_err(mdev, "Couldn't restore HCA COMMAND, " + "aborting.\n"); + } +free_bh: + kfree(bridge_header); +free_hca: + kfree(hca_header); +put_dev: + pci_dev_put(bridge); + return err; +} diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c new file mode 100644 index 000000000..a85935ccc --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_srq.c @@ -0,0 +1,698 @@ +/* + * Copyright (c) 2005 Cisco Systems. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/sched.h> + +#include <asm/io.h> + +#include <rdma/uverbs_ioctl.h> + +#include "mthca_dev.h" +#include "mthca_cmd.h" +#include "mthca_memfree.h" +#include "mthca_wqe.h" + +enum { + MTHCA_MAX_DIRECT_SRQ_SIZE = 4 * PAGE_SIZE +}; + +struct mthca_tavor_srq_context { + __be64 wqe_base_ds; /* low 6 bits is descriptor size */ + __be32 state_pd; + __be32 lkey; + __be32 uar; + __be16 limit_watermark; + __be16 wqe_cnt; + u32 reserved[2]; +}; + +struct mthca_arbel_srq_context { + __be32 state_logsize_srqn; + __be32 lkey; + __be32 db_index; + __be32 logstride_usrpage; + __be64 wqe_base; + __be32 eq_pd; + __be16 limit_watermark; + __be16 wqe_cnt; + u16 reserved1; + __be16 wqe_counter; + u32 reserved2[3]; +}; + +static void *get_wqe(struct mthca_srq *srq, int n) +{ + if (srq->is_direct) + return srq->queue.direct.buf + (n << srq->wqe_shift); + else + return srq->queue.page_list[(n << srq->wqe_shift) >> PAGE_SHIFT].buf + + ((n << srq->wqe_shift) & (PAGE_SIZE - 1)); +} + +/* + * Return a pointer to the location within a WQE that we're using as a + * link when the WQE is in the free list. We use the imm field + * because in the Tavor case, posting a WQE may overwrite the next + * segment of the previous WQE, but a receive WQE will never touch the + * imm field. This avoids corrupting our free list if the previous + * WQE has already completed and been put on the free list when we + * post the next WQE. + */ +static inline int *wqe_to_link(void *wqe) +{ + return (int *) (wqe + offsetof(struct mthca_next_seg, imm)); +} + +static void mthca_tavor_init_srq_context(struct mthca_dev *dev, + struct mthca_pd *pd, + struct mthca_srq *srq, + struct mthca_tavor_srq_context *context, + struct ib_udata *udata) +{ + struct mthca_ucontext *ucontext = rdma_udata_to_drv_context( + udata, struct mthca_ucontext, ibucontext); + + memset(context, 0, sizeof *context); + + context->wqe_base_ds = cpu_to_be64(1 << (srq->wqe_shift - 4)); + context->state_pd = cpu_to_be32(pd->pd_num); + context->lkey = cpu_to_be32(srq->mr.ibmr.lkey); + + if (udata) + context->uar = cpu_to_be32(ucontext->uar.index); + else + context->uar = cpu_to_be32(dev->driver_uar.index); +} + +static void mthca_arbel_init_srq_context(struct mthca_dev *dev, + struct mthca_pd *pd, + struct mthca_srq *srq, + struct mthca_arbel_srq_context *context, + struct ib_udata *udata) +{ + struct mthca_ucontext *ucontext = rdma_udata_to_drv_context( + udata, struct mthca_ucontext, ibucontext); + int logsize, max; + + memset(context, 0, sizeof *context); + + /* + * Put max in a temporary variable to work around gcc bug + * triggered by ilog2() on sparc64. + */ + max = srq->max; + logsize = ilog2(max); + context->state_logsize_srqn = cpu_to_be32(logsize << 24 | srq->srqn); + context->lkey = cpu_to_be32(srq->mr.ibmr.lkey); + context->db_index = cpu_to_be32(srq->db_index); + context->logstride_usrpage = cpu_to_be32((srq->wqe_shift - 4) << 29); + if (udata) + context->logstride_usrpage |= cpu_to_be32(ucontext->uar.index); + else + context->logstride_usrpage |= cpu_to_be32(dev->driver_uar.index); + context->eq_pd = cpu_to_be32(MTHCA_EQ_ASYNC << 24 | pd->pd_num); +} + +static void mthca_free_srq_buf(struct mthca_dev *dev, struct mthca_srq *srq) +{ + mthca_buf_free(dev, srq->max << srq->wqe_shift, &srq->queue, + srq->is_direct, &srq->mr); + kfree(srq->wrid); +} + +static int mthca_alloc_srq_buf(struct mthca_dev *dev, struct mthca_pd *pd, + struct mthca_srq *srq, struct ib_udata *udata) +{ + struct mthca_data_seg *scatter; + void *wqe; + int err; + int i; + + if (udata) + return 0; + + srq->wrid = kmalloc_array(srq->max, sizeof(u64), GFP_KERNEL); + if (!srq->wrid) + return -ENOMEM; + + err = mthca_buf_alloc(dev, srq->max << srq->wqe_shift, + MTHCA_MAX_DIRECT_SRQ_SIZE, + &srq->queue, &srq->is_direct, pd, 1, &srq->mr); + if (err) { + kfree(srq->wrid); + return err; + } + + /* + * Now initialize the SRQ buffer so that all of the WQEs are + * linked into the list of free WQEs. In addition, set the + * scatter list L_Keys to the sentry value of 0x100. + */ + for (i = 0; i < srq->max; ++i) { + struct mthca_next_seg *next; + + next = wqe = get_wqe(srq, i); + + if (i < srq->max - 1) { + *wqe_to_link(wqe) = i + 1; + next->nda_op = htonl(((i + 1) << srq->wqe_shift) | 1); + } else { + *wqe_to_link(wqe) = -1; + next->nda_op = 0; + } + + for (scatter = wqe + sizeof (struct mthca_next_seg); + (void *) scatter < wqe + (1 << srq->wqe_shift); + ++scatter) + scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY); + } + + srq->last = get_wqe(srq, srq->max - 1); + + return 0; +} + +int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd, + struct ib_srq_attr *attr, struct mthca_srq *srq, + struct ib_udata *udata) +{ + struct mthca_mailbox *mailbox; + int ds; + int err; + + /* Sanity check SRQ size before proceeding */ + if (attr->max_wr > dev->limits.max_srq_wqes || + attr->max_sge > dev->limits.max_srq_sge) + return -EINVAL; + + srq->max = attr->max_wr; + srq->max_gs = attr->max_sge; + srq->counter = 0; + + if (mthca_is_memfree(dev)) + srq->max = roundup_pow_of_two(srq->max + 1); + else + srq->max = srq->max + 1; + + ds = max(64UL, + roundup_pow_of_two(sizeof (struct mthca_next_seg) + + srq->max_gs * sizeof (struct mthca_data_seg))); + + if (!mthca_is_memfree(dev) && (ds > dev->limits.max_desc_sz)) + return -EINVAL; + + srq->wqe_shift = ilog2(ds); + + srq->srqn = mthca_alloc(&dev->srq_table.alloc); + if (srq->srqn == -1) + return -ENOMEM; + + if (mthca_is_memfree(dev)) { + err = mthca_table_get(dev, dev->srq_table.table, srq->srqn); + if (err) + goto err_out; + + if (!udata) { + srq->db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SRQ, + srq->srqn, &srq->db); + if (srq->db_index < 0) { + err = -ENOMEM; + goto err_out_icm; + } + } + } + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) { + err = PTR_ERR(mailbox); + goto err_out_db; + } + + err = mthca_alloc_srq_buf(dev, pd, srq, udata); + if (err) + goto err_out_mailbox; + + spin_lock_init(&srq->lock); + srq->refcount = 1; + init_waitqueue_head(&srq->wait); + mutex_init(&srq->mutex); + + if (mthca_is_memfree(dev)) + mthca_arbel_init_srq_context(dev, pd, srq, mailbox->buf, udata); + else + mthca_tavor_init_srq_context(dev, pd, srq, mailbox->buf, udata); + + err = mthca_SW2HW_SRQ(dev, mailbox, srq->srqn); + + if (err) { + mthca_warn(dev, "SW2HW_SRQ failed (%d)\n", err); + goto err_out_free_buf; + } + + spin_lock_irq(&dev->srq_table.lock); + if (mthca_array_set(&dev->srq_table.srq, + srq->srqn & (dev->limits.num_srqs - 1), + srq)) { + spin_unlock_irq(&dev->srq_table.lock); + goto err_out_free_srq; + } + spin_unlock_irq(&dev->srq_table.lock); + + mthca_free_mailbox(dev, mailbox); + + srq->first_free = 0; + srq->last_free = srq->max - 1; + + attr->max_wr = srq->max - 1; + attr->max_sge = srq->max_gs; + + return 0; + +err_out_free_srq: + err = mthca_HW2SW_SRQ(dev, mailbox, srq->srqn); + if (err) + mthca_warn(dev, "HW2SW_SRQ failed (%d)\n", err); + +err_out_free_buf: + if (!udata) + mthca_free_srq_buf(dev, srq); + +err_out_mailbox: + mthca_free_mailbox(dev, mailbox); + +err_out_db: + if (!udata && mthca_is_memfree(dev)) + mthca_free_db(dev, MTHCA_DB_TYPE_SRQ, srq->db_index); + +err_out_icm: + mthca_table_put(dev, dev->srq_table.table, srq->srqn); + +err_out: + mthca_free(&dev->srq_table.alloc, srq->srqn); + + return err; +} + +static inline int get_srq_refcount(struct mthca_dev *dev, struct mthca_srq *srq) +{ + int c; + + spin_lock_irq(&dev->srq_table.lock); + c = srq->refcount; + spin_unlock_irq(&dev->srq_table.lock); + + return c; +} + +void mthca_free_srq(struct mthca_dev *dev, struct mthca_srq *srq) +{ + struct mthca_mailbox *mailbox; + int err; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) { + mthca_warn(dev, "No memory for mailbox to free SRQ.\n"); + return; + } + + err = mthca_HW2SW_SRQ(dev, mailbox, srq->srqn); + if (err) + mthca_warn(dev, "HW2SW_SRQ failed (%d)\n", err); + + spin_lock_irq(&dev->srq_table.lock); + mthca_array_clear(&dev->srq_table.srq, + srq->srqn & (dev->limits.num_srqs - 1)); + --srq->refcount; + spin_unlock_irq(&dev->srq_table.lock); + + wait_event(srq->wait, !get_srq_refcount(dev, srq)); + + if (!srq->ibsrq.uobject) { + mthca_free_srq_buf(dev, srq); + if (mthca_is_memfree(dev)) + mthca_free_db(dev, MTHCA_DB_TYPE_SRQ, srq->db_index); + } + + mthca_table_put(dev, dev->srq_table.table, srq->srqn); + mthca_free(&dev->srq_table.alloc, srq->srqn); + mthca_free_mailbox(dev, mailbox); +} + +int mthca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, + enum ib_srq_attr_mask attr_mask, struct ib_udata *udata) +{ + struct mthca_dev *dev = to_mdev(ibsrq->device); + struct mthca_srq *srq = to_msrq(ibsrq); + int ret = 0; + + /* We don't support resizing SRQs (yet?) */ + if (attr_mask & IB_SRQ_MAX_WR) + return -EINVAL; + + if (attr_mask & IB_SRQ_LIMIT) { + u32 max_wr = mthca_is_memfree(dev) ? srq->max - 1 : srq->max; + if (attr->srq_limit > max_wr) + return -EINVAL; + + mutex_lock(&srq->mutex); + ret = mthca_ARM_SRQ(dev, srq->srqn, attr->srq_limit); + mutex_unlock(&srq->mutex); + } + + return ret; +} + +int mthca_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr) +{ + struct mthca_dev *dev = to_mdev(ibsrq->device); + struct mthca_srq *srq = to_msrq(ibsrq); + struct mthca_mailbox *mailbox; + struct mthca_arbel_srq_context *arbel_ctx; + struct mthca_tavor_srq_context *tavor_ctx; + int err; + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + + err = mthca_QUERY_SRQ(dev, srq->srqn, mailbox); + if (err) + goto out; + + if (mthca_is_memfree(dev)) { + arbel_ctx = mailbox->buf; + srq_attr->srq_limit = be16_to_cpu(arbel_ctx->limit_watermark); + } else { + tavor_ctx = mailbox->buf; + srq_attr->srq_limit = be16_to_cpu(tavor_ctx->limit_watermark); + } + + srq_attr->max_wr = srq->max - 1; + srq_attr->max_sge = srq->max_gs; + +out: + mthca_free_mailbox(dev, mailbox); + + return err; +} + +void mthca_srq_event(struct mthca_dev *dev, u32 srqn, + enum ib_event_type event_type) +{ + struct mthca_srq *srq; + struct ib_event event; + + spin_lock(&dev->srq_table.lock); + srq = mthca_array_get(&dev->srq_table.srq, srqn & (dev->limits.num_srqs - 1)); + if (srq) + ++srq->refcount; + spin_unlock(&dev->srq_table.lock); + + if (!srq) { + mthca_warn(dev, "Async event for bogus SRQ %08x\n", srqn); + return; + } + + if (!srq->ibsrq.event_handler) + goto out; + + event.device = &dev->ib_dev; + event.event = event_type; + event.element.srq = &srq->ibsrq; + srq->ibsrq.event_handler(&event, srq->ibsrq.srq_context); + +out: + spin_lock(&dev->srq_table.lock); + if (!--srq->refcount) + wake_up(&srq->wait); + spin_unlock(&dev->srq_table.lock); +} + +/* + * This function must be called with IRQs disabled. + */ +void mthca_free_srq_wqe(struct mthca_srq *srq, u32 wqe_addr) +{ + int ind; + struct mthca_next_seg *last_free; + + ind = wqe_addr >> srq->wqe_shift; + + spin_lock(&srq->lock); + + last_free = get_wqe(srq, srq->last_free); + *wqe_to_link(last_free) = ind; + last_free->nda_op = htonl((ind << srq->wqe_shift) | 1); + *wqe_to_link(get_wqe(srq, ind)) = -1; + srq->last_free = ind; + + spin_unlock(&srq->lock); +} + +int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + struct mthca_dev *dev = to_mdev(ibsrq->device); + struct mthca_srq *srq = to_msrq(ibsrq); + unsigned long flags; + int err = 0; + int first_ind; + int ind; + int next_ind; + int nreq; + int i; + void *wqe; + void *prev_wqe; + + spin_lock_irqsave(&srq->lock, flags); + + first_ind = srq->first_free; + + for (nreq = 0; wr; wr = wr->next) { + ind = srq->first_free; + wqe = get_wqe(srq, ind); + next_ind = *wqe_to_link(wqe); + + if (unlikely(next_ind < 0)) { + mthca_err(dev, "SRQ %06x full\n", srq->srqn); + err = -ENOMEM; + *bad_wr = wr; + break; + } + + prev_wqe = srq->last; + srq->last = wqe; + + ((struct mthca_next_seg *) wqe)->ee_nds = 0; + /* flags field will always remain 0 */ + + wqe += sizeof (struct mthca_next_seg); + + if (unlikely(wr->num_sge > srq->max_gs)) { + err = -EINVAL; + *bad_wr = wr; + srq->last = prev_wqe; + break; + } + + for (i = 0; i < wr->num_sge; ++i) { + mthca_set_data_seg(wqe, wr->sg_list + i); + wqe += sizeof (struct mthca_data_seg); + } + + if (i < srq->max_gs) + mthca_set_data_seg_inval(wqe); + + ((struct mthca_next_seg *) prev_wqe)->ee_nds = + cpu_to_be32(MTHCA_NEXT_DBD); + + srq->wrid[ind] = wr->wr_id; + srq->first_free = next_ind; + + ++nreq; + if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) { + nreq = 0; + + /* + * Make sure that descriptors are written + * before doorbell is rung. + */ + wmb(); + + mthca_write64(first_ind << srq->wqe_shift, srq->srqn << 8, + dev->kar + MTHCA_RECEIVE_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); + + first_ind = srq->first_free; + } + } + + if (likely(nreq)) { + /* + * Make sure that descriptors are written before + * doorbell is rung. + */ + wmb(); + + mthca_write64(first_ind << srq->wqe_shift, (srq->srqn << 8) | nreq, + dev->kar + MTHCA_RECEIVE_DOORBELL, + MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); + } + + spin_unlock_irqrestore(&srq->lock, flags); + return err; +} + +int mthca_arbel_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + struct mthca_dev *dev = to_mdev(ibsrq->device); + struct mthca_srq *srq = to_msrq(ibsrq); + unsigned long flags; + int err = 0; + int ind; + int next_ind; + int nreq; + int i; + void *wqe; + + spin_lock_irqsave(&srq->lock, flags); + + for (nreq = 0; wr; ++nreq, wr = wr->next) { + ind = srq->first_free; + wqe = get_wqe(srq, ind); + next_ind = *wqe_to_link(wqe); + + if (unlikely(next_ind < 0)) { + mthca_err(dev, "SRQ %06x full\n", srq->srqn); + err = -ENOMEM; + *bad_wr = wr; + break; + } + + ((struct mthca_next_seg *) wqe)->ee_nds = 0; + /* flags field will always remain 0 */ + + wqe += sizeof (struct mthca_next_seg); + + if (unlikely(wr->num_sge > srq->max_gs)) { + err = -EINVAL; + *bad_wr = wr; + break; + } + + for (i = 0; i < wr->num_sge; ++i) { + mthca_set_data_seg(wqe, wr->sg_list + i); + wqe += sizeof (struct mthca_data_seg); + } + + if (i < srq->max_gs) + mthca_set_data_seg_inval(wqe); + + srq->wrid[ind] = wr->wr_id; + srq->first_free = next_ind; + } + + if (likely(nreq)) { + srq->counter += nreq; + + /* + * Make sure that descriptors are written before + * we write doorbell record. + */ + wmb(); + *srq->db = cpu_to_be32(srq->counter); + } + + spin_unlock_irqrestore(&srq->lock, flags); + return err; +} + +int mthca_max_srq_sge(struct mthca_dev *dev) +{ + if (mthca_is_memfree(dev)) + return dev->limits.max_sg; + + /* + * SRQ allocations are based on powers of 2 for Tavor, + * (although they only need to be multiples of 16 bytes). + * + * Therefore, we need to base the max number of sg entries on + * the largest power of 2 descriptor size that is <= to the + * actual max WQE descriptor size, rather than return the + * max_sg value given by the firmware (which is based on WQE + * sizes as multiples of 16, not powers of 2). + * + * If SRQ implementation is changed for Tavor to be based on + * multiples of 16, the calculation below can be deleted and + * the FW max_sg value returned. + */ + return min_t(int, dev->limits.max_sg, + ((1 << (fls(dev->limits.max_desc_sz) - 1)) - + sizeof (struct mthca_next_seg)) / + sizeof (struct mthca_data_seg)); +} + +int mthca_init_srq_table(struct mthca_dev *dev) +{ + int err; + + if (!(dev->mthca_flags & MTHCA_FLAG_SRQ)) + return 0; + + spin_lock_init(&dev->srq_table.lock); + + err = mthca_alloc_init(&dev->srq_table.alloc, + dev->limits.num_srqs, + dev->limits.num_srqs - 1, + dev->limits.reserved_srqs); + if (err) + return err; + + err = mthca_array_init(&dev->srq_table.srq, + dev->limits.num_srqs); + if (err) + mthca_alloc_cleanup(&dev->srq_table.alloc); + + return err; +} + +void mthca_cleanup_srq_table(struct mthca_dev *dev) +{ + if (!(dev->mthca_flags & MTHCA_FLAG_SRQ)) + return; + + mthca_array_cleanup(&dev->srq_table.srq, dev->limits.num_srqs); + mthca_alloc_cleanup(&dev->srq_table.alloc); +} diff --git a/drivers/infiniband/hw/mthca/mthca_uar.c b/drivers/infiniband/hw/mthca/mthca_uar.c new file mode 100644 index 000000000..ca5900c96 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_uar.c @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2005 Topspin Communications. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <asm/page.h> /* PAGE_SHIFT */ + +#include "mthca_dev.h" +#include "mthca_memfree.h" + +int mthca_uar_alloc(struct mthca_dev *dev, struct mthca_uar *uar) +{ + uar->index = mthca_alloc(&dev->uar_table.alloc); + if (uar->index == -1) + return -ENOMEM; + + uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index; + + return 0; +} + +void mthca_uar_free(struct mthca_dev *dev, struct mthca_uar *uar) +{ + mthca_free(&dev->uar_table.alloc, uar->index); +} + +int mthca_init_uar_table(struct mthca_dev *dev) +{ + int ret; + + ret = mthca_alloc_init(&dev->uar_table.alloc, + dev->limits.num_uars, + dev->limits.num_uars - 1, + dev->limits.reserved_uars + 1); + if (ret) + return ret; + + ret = mthca_init_db_tab(dev); + if (ret) + mthca_alloc_cleanup(&dev->uar_table.alloc); + + return ret; +} + +void mthca_cleanup_uar_table(struct mthca_dev *dev) +{ + mthca_cleanup_db_tab(dev); + + /* XXX check if any UARs are still allocated? */ + mthca_alloc_cleanup(&dev->uar_table.alloc); +} diff --git a/drivers/infiniband/hw/mthca/mthca_wqe.h b/drivers/infiniband/hw/mthca/mthca_wqe.h new file mode 100644 index 000000000..341a5ae88 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_wqe.h @@ -0,0 +1,131 @@ +/* + * Copyright (c) 2005 Cisco Systems. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef MTHCA_WQE_H +#define MTHCA_WQE_H + +#include <linux/types.h> + +enum { + MTHCA_NEXT_DBD = 1 << 7, + MTHCA_NEXT_FENCE = 1 << 6, + MTHCA_NEXT_CQ_UPDATE = 1 << 3, + MTHCA_NEXT_EVENT_GEN = 1 << 2, + MTHCA_NEXT_SOLICIT = 1 << 1, + MTHCA_NEXT_IP_CSUM = 1 << 4, + MTHCA_NEXT_TCP_UDP_CSUM = 1 << 5, + + MTHCA_MLX_VL15 = 1 << 17, + MTHCA_MLX_SLR = 1 << 16 +}; + +enum { + MTHCA_INVAL_LKEY = 0x100, + MTHCA_TAVOR_MAX_WQES_PER_RECV_DB = 256, + MTHCA_ARBEL_MAX_WQES_PER_SEND_DB = 255 +}; + +struct mthca_next_seg { + __be32 nda_op; /* [31:6] next WQE [4:0] next opcode */ + __be32 ee_nds; /* [31:8] next EE [7] DBD [6] F [5:0] next WQE size */ + __be32 flags; /* [3] CQ [2] Event [1] Solicit */ + __be32 imm; /* immediate data */ +}; + +struct mthca_tavor_ud_seg { + u32 reserved1; + __be32 lkey; + __be64 av_addr; + u32 reserved2[4]; + __be32 dqpn; + __be32 qkey; + u32 reserved3[2]; +}; + +struct mthca_arbel_ud_seg { + __be32 av[8]; + __be32 dqpn; + __be32 qkey; + u32 reserved[2]; +}; + +struct mthca_bind_seg { + __be32 flags; /* [31] Atomic [30] rem write [29] rem read */ + u32 reserved; + __be32 new_rkey; + __be32 lkey; + __be64 addr; + __be64 length; +}; + +struct mthca_raddr_seg { + __be64 raddr; + __be32 rkey; + u32 reserved; +}; + +struct mthca_atomic_seg { + __be64 swap_add; + __be64 compare; +}; + +struct mthca_data_seg { + __be32 byte_count; + __be32 lkey; + __be64 addr; +}; + +struct mthca_mlx_seg { + __be32 nda_op; + __be32 nds; + __be32 flags; /* [17] VL15 [16] SLR [14:12] static rate + [11:8] SL [3] C [2] E */ + __be16 rlid; + __be16 vcrc; +}; + +static __always_inline void mthca_set_data_seg(struct mthca_data_seg *dseg, + struct ib_sge *sg) +{ + dseg->byte_count = cpu_to_be32(sg->length); + dseg->lkey = cpu_to_be32(sg->lkey); + dseg->addr = cpu_to_be64(sg->addr); +} + +static __always_inline void mthca_set_data_seg_inval(struct mthca_data_seg *dseg) +{ + dseg->byte_count = 0; + dseg->lkey = cpu_to_be32(MTHCA_INVAL_LKEY); + dseg->addr = 0; +} + +#endif /* MTHCA_WQE_H */ |