diff options
Diffstat (limited to 'drivers/infiniband/hw/hns/hns_roce_mr.c')
| -rw-r--r-- | drivers/infiniband/hw/hns/hns_roce_mr.c | 1115 |
1 files changed, 1115 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c new file mode 100644 index 000000000..d5b3b10e0 --- /dev/null +++ b/drivers/infiniband/hw/hns/hns_roce_mr.c @@ -0,0 +1,1115 @@ +/* + * Copyright (c) 2016 Hisilicon Limited. + * Copyright (c) 2007, 2008 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/platform_device.h> +#include <linux/vmalloc.h> +#include <rdma/ib_umem.h> +#include "hns_roce_device.h" +#include "hns_roce_cmd.h" +#include "hns_roce_hem.h" + +static u32 hw_index_to_key(unsigned long ind) +{ + return (u32)(ind >> 24) | (ind << 8); +} + +unsigned long key_to_hw_index(u32 key) +{ + return (key << 24) | (key >> 8); +} + +static int hns_roce_hw_create_mpt(struct hns_roce_dev *hr_dev, + struct hns_roce_cmd_mailbox *mailbox, + unsigned long mpt_index) +{ + return hns_roce_cmd_mbox(hr_dev, mailbox->dma, 0, mpt_index, 0, + HNS_ROCE_CMD_CREATE_MPT, + HNS_ROCE_CMD_TIMEOUT_MSECS); +} + +int hns_roce_hw_destroy_mpt(struct hns_roce_dev *hr_dev, + struct hns_roce_cmd_mailbox *mailbox, + unsigned long mpt_index) +{ + return hns_roce_cmd_mbox(hr_dev, 0, mailbox ? mailbox->dma : 0, + mpt_index, !mailbox, HNS_ROCE_CMD_DESTROY_MPT, + HNS_ROCE_CMD_TIMEOUT_MSECS); +} + +static int alloc_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr, + u32 pd, u64 iova, u64 size, u32 access) +{ + struct ib_device *ibdev = &hr_dev->ib_dev; + unsigned long obj = 0; + int err; + + /* Allocate a key for mr from mr_table */ + err = hns_roce_bitmap_alloc(&hr_dev->mr_table.mtpt_bitmap, &obj); + if (err) { + ibdev_err(ibdev, + "failed to alloc bitmap for MR key, ret = %d.\n", + err); + return -ENOMEM; + } + + mr->iova = iova; /* MR va starting addr */ + mr->size = size; /* MR addr range */ + mr->pd = pd; /* MR num */ + mr->access = access; /* MR access permit */ + mr->enabled = 0; /* MR active status */ + mr->key = hw_index_to_key(obj); /* MR key */ + + err = hns_roce_table_get(hr_dev, &hr_dev->mr_table.mtpt_table, obj); + if (err) { + ibdev_err(ibdev, "failed to alloc mtpt, ret = %d.\n", err); + goto err_free_bitmap; + } + + return 0; +err_free_bitmap: + hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj, BITMAP_NO_RR); + return err; +} + +static void free_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr) +{ + unsigned long obj = key_to_hw_index(mr->key); + + hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table, obj); + hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj, BITMAP_NO_RR); +} + +static int alloc_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr, + size_t length, struct ib_udata *udata, u64 start, + int access) +{ + struct ib_device *ibdev = &hr_dev->ib_dev; + bool is_fast = mr->type == MR_TYPE_FRMR; + struct hns_roce_buf_attr buf_attr = {}; + int err; + + mr->pbl_hop_num = is_fast ? 1 : hr_dev->caps.pbl_hop_num; + buf_attr.page_shift = is_fast ? PAGE_SHIFT : + hr_dev->caps.pbl_buf_pg_sz + PAGE_SHIFT; + buf_attr.region[0].size = length; + buf_attr.region[0].hopnum = mr->pbl_hop_num; + buf_attr.region_count = 1; + buf_attr.fixed_page = true; + buf_attr.user_access = access; + /* fast MR's buffer is alloced before mapping, not at creation */ + buf_attr.mtt_only = is_fast; + + err = hns_roce_mtr_create(hr_dev, &mr->pbl_mtr, &buf_attr, + hr_dev->caps.pbl_ba_pg_sz + HNS_HW_PAGE_SHIFT, + udata, start); + if (err) + ibdev_err(ibdev, "failed to alloc pbl mtr, ret = %d.\n", err); + else + mr->npages = mr->pbl_mtr.hem_cfg.buf_pg_count; + + return err; +} + +static void free_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr) +{ + hns_roce_mtr_destroy(hr_dev, &mr->pbl_mtr); +} + +static void hns_roce_mr_free(struct hns_roce_dev *hr_dev, + struct hns_roce_mr *mr) +{ + struct ib_device *ibdev = &hr_dev->ib_dev; + int ret; + + if (mr->enabled) { + ret = hns_roce_hw_destroy_mpt(hr_dev, NULL, + key_to_hw_index(mr->key) & + (hr_dev->caps.num_mtpts - 1)); + if (ret) + ibdev_warn(ibdev, "failed to destroy mpt, ret = %d.\n", + ret); + } + + free_mr_pbl(hr_dev, mr); + free_mr_key(hr_dev, mr); +} + +static int hns_roce_mr_enable(struct hns_roce_dev *hr_dev, + struct hns_roce_mr *mr) +{ + unsigned long mtpt_idx = key_to_hw_index(mr->key); + struct hns_roce_cmd_mailbox *mailbox; + struct device *dev = hr_dev->dev; + int ret; + + /* Allocate mailbox memory */ + mailbox = hns_roce_alloc_cmd_mailbox(hr_dev); + if (IS_ERR(mailbox)) { + ret = PTR_ERR(mailbox); + return ret; + } + + if (mr->type != MR_TYPE_FRMR) + ret = hr_dev->hw->write_mtpt(hr_dev, mailbox->buf, mr, + mtpt_idx); + else + ret = hr_dev->hw->frmr_write_mtpt(hr_dev, mailbox->buf, mr); + if (ret) { + dev_err(dev, "failed to write mtpt, ret = %d.\n", ret); + goto err_page; + } + + ret = hns_roce_hw_create_mpt(hr_dev, mailbox, + mtpt_idx & (hr_dev->caps.num_mtpts - 1)); + if (ret) { + dev_err(dev, "failed to create mpt, ret = %d.\n", ret); + goto err_page; + } + + mr->enabled = 1; + hns_roce_free_cmd_mailbox(hr_dev, mailbox); + + return 0; + +err_page: + hns_roce_free_cmd_mailbox(hr_dev, mailbox); + + return ret; +} + +int hns_roce_init_mr_table(struct hns_roce_dev *hr_dev) +{ + struct hns_roce_mr_table *mr_table = &hr_dev->mr_table; + int ret; + + ret = hns_roce_bitmap_init(&mr_table->mtpt_bitmap, + hr_dev->caps.num_mtpts, + hr_dev->caps.num_mtpts - 1, + hr_dev->caps.reserved_mrws, 0); + return ret; +} + +void hns_roce_cleanup_mr_table(struct hns_roce_dev *hr_dev) +{ + struct hns_roce_mr_table *mr_table = &hr_dev->mr_table; + + hns_roce_bitmap_cleanup(&mr_table->mtpt_bitmap); +} + +struct ib_mr *hns_roce_get_dma_mr(struct ib_pd *pd, int acc) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(pd->device); + struct hns_roce_mr *mr; + int ret; + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (mr == NULL) + return ERR_PTR(-ENOMEM); + + mr->type = MR_TYPE_DMA; + + /* Allocate memory region key */ + hns_roce_hem_list_init(&mr->pbl_mtr.hem_list); + ret = alloc_mr_key(hr_dev, mr, to_hr_pd(pd)->pdn, 0, 0, acc); + if (ret) + goto err_free; + + ret = hns_roce_mr_enable(to_hr_dev(pd->device), mr); + if (ret) + goto err_mr; + + mr->ibmr.rkey = mr->ibmr.lkey = mr->key; + + return &mr->ibmr; +err_mr: + free_mr_key(hr_dev, mr); + +err_free: + kfree(mr); + return ERR_PTR(ret); +} + +struct ib_mr *hns_roce_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, + u64 virt_addr, int access_flags, + struct ib_udata *udata) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(pd->device); + struct hns_roce_mr *mr; + int ret; + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + mr->type = MR_TYPE_MR; + ret = alloc_mr_key(hr_dev, mr, to_hr_pd(pd)->pdn, virt_addr, length, + access_flags); + if (ret) + goto err_alloc_mr; + + ret = alloc_mr_pbl(hr_dev, mr, length, udata, start, access_flags); + if (ret) + goto err_alloc_key; + + ret = hns_roce_mr_enable(hr_dev, mr); + if (ret) + goto err_alloc_pbl; + + mr->ibmr.rkey = mr->ibmr.lkey = mr->key; + + return &mr->ibmr; + +err_alloc_pbl: + free_mr_pbl(hr_dev, mr); +err_alloc_key: + free_mr_key(hr_dev, mr); +err_alloc_mr: + kfree(mr); + return ERR_PTR(ret); +} + +static int rereg_mr_trans(struct ib_mr *ibmr, int flags, + u64 start, u64 length, + u64 virt_addr, int mr_access_flags, + struct hns_roce_cmd_mailbox *mailbox, + u32 pdn, struct ib_udata *udata) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device); + struct ib_device *ibdev = &hr_dev->ib_dev; + struct hns_roce_mr *mr = to_hr_mr(ibmr); + int ret; + + free_mr_pbl(hr_dev, mr); + ret = alloc_mr_pbl(hr_dev, mr, length, udata, start, mr_access_flags); + if (ret) { + ibdev_err(ibdev, "failed to create mr PBL, ret = %d.\n", ret); + return ret; + } + + ret = hr_dev->hw->rereg_write_mtpt(hr_dev, mr, flags, pdn, + mr_access_flags, virt_addr, + length, mailbox->buf); + if (ret) { + ibdev_err(ibdev, "failed to write mtpt, ret = %d.\n", ret); + free_mr_pbl(hr_dev, mr); + } + + return ret; +} + +int hns_roce_rereg_user_mr(struct ib_mr *ibmr, int flags, u64 start, u64 length, + u64 virt_addr, int mr_access_flags, struct ib_pd *pd, + struct ib_udata *udata) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device); + struct ib_device *ib_dev = &hr_dev->ib_dev; + struct hns_roce_mr *mr = to_hr_mr(ibmr); + struct hns_roce_cmd_mailbox *mailbox; + unsigned long mtpt_idx; + u32 pdn = 0; + int ret; + + if (!mr->enabled) + return -EINVAL; + + mailbox = hns_roce_alloc_cmd_mailbox(hr_dev); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + + mtpt_idx = key_to_hw_index(mr->key) & (hr_dev->caps.num_mtpts - 1); + ret = hns_roce_cmd_mbox(hr_dev, 0, mailbox->dma, mtpt_idx, 0, + HNS_ROCE_CMD_QUERY_MPT, + HNS_ROCE_CMD_TIMEOUT_MSECS); + if (ret) + goto free_cmd_mbox; + + ret = hns_roce_hw_destroy_mpt(hr_dev, NULL, mtpt_idx); + if (ret) + ibdev_warn(ib_dev, "failed to destroy MPT, ret = %d.\n", ret); + + mr->enabled = 0; + + if (flags & IB_MR_REREG_PD) + pdn = to_hr_pd(pd)->pdn; + + if (flags & IB_MR_REREG_TRANS) { + ret = rereg_mr_trans(ibmr, flags, + start, length, + virt_addr, mr_access_flags, + mailbox, pdn, udata); + if (ret) + goto free_cmd_mbox; + } else { + ret = hr_dev->hw->rereg_write_mtpt(hr_dev, mr, flags, pdn, + mr_access_flags, virt_addr, + length, mailbox->buf); + if (ret) + goto free_cmd_mbox; + } + + ret = hns_roce_hw_create_mpt(hr_dev, mailbox, mtpt_idx); + if (ret) { + ibdev_err(ib_dev, "failed to create MPT, ret = %d.\n", ret); + goto free_cmd_mbox; + } + + mr->enabled = 1; + if (flags & IB_MR_REREG_ACCESS) + mr->access = mr_access_flags; + + hns_roce_free_cmd_mailbox(hr_dev, mailbox); + + return 0; + +free_cmd_mbox: + hns_roce_free_cmd_mailbox(hr_dev, mailbox); + + return ret; +} + +int hns_roce_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device); + struct hns_roce_mr *mr = to_hr_mr(ibmr); + int ret = 0; + + if (hr_dev->hw->dereg_mr) { + ret = hr_dev->hw->dereg_mr(hr_dev, mr, udata); + } else { + hns_roce_mr_free(hr_dev, mr); + kfree(mr); + } + + return ret; +} + +struct ib_mr *hns_roce_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, + u32 max_num_sg) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(pd->device); + struct device *dev = hr_dev->dev; + struct hns_roce_mr *mr; + u64 length; + int ret; + + if (mr_type != IB_MR_TYPE_MEM_REG) + return ERR_PTR(-EINVAL); + + if (max_num_sg > HNS_ROCE_FRMR_MAX_PA) { + dev_err(dev, "max_num_sg larger than %d\n", + HNS_ROCE_FRMR_MAX_PA); + return ERR_PTR(-EINVAL); + } + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + mr->type = MR_TYPE_FRMR; + + /* Allocate memory region key */ + length = max_num_sg * (1 << PAGE_SHIFT); + ret = alloc_mr_key(hr_dev, mr, to_hr_pd(pd)->pdn, 0, length, 0); + if (ret) + goto err_free; + + ret = alloc_mr_pbl(hr_dev, mr, length, NULL, 0, 0); + if (ret) + goto err_key; + + ret = hns_roce_mr_enable(hr_dev, mr); + if (ret) + goto err_pbl; + + mr->ibmr.rkey = mr->ibmr.lkey = mr->key; + mr->ibmr.length = length; + + return &mr->ibmr; + +err_pbl: + free_mr_pbl(hr_dev, mr); +err_key: + free_mr_key(hr_dev, mr); +err_free: + kfree(mr); + return ERR_PTR(ret); +} + +static int hns_roce_set_page(struct ib_mr *ibmr, u64 addr) +{ + struct hns_roce_mr *mr = to_hr_mr(ibmr); + + if (likely(mr->npages < mr->pbl_mtr.hem_cfg.buf_pg_count)) { + mr->page_list[mr->npages++] = addr; + return 0; + } + + return -ENOBUFS; +} + +int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int *sg_offset) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device); + struct ib_device *ibdev = &hr_dev->ib_dev; + struct hns_roce_mr *mr = to_hr_mr(ibmr); + struct hns_roce_mtr *mtr = &mr->pbl_mtr; + int ret = 0; + + mr->npages = 0; + mr->page_list = kvcalloc(mr->pbl_mtr.hem_cfg.buf_pg_count, + sizeof(dma_addr_t), GFP_KERNEL); + if (!mr->page_list) + return ret; + + ret = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, hns_roce_set_page); + if (ret < 1) { + ibdev_err(ibdev, "failed to store sg pages %u %u, cnt = %d.\n", + mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, ret); + goto err_page_list; + } + + mtr->hem_cfg.region[0].offset = 0; + mtr->hem_cfg.region[0].count = mr->npages; + mtr->hem_cfg.region[0].hopnum = mr->pbl_hop_num; + mtr->hem_cfg.region_count = 1; + ret = hns_roce_mtr_map(hr_dev, mtr, mr->page_list, mr->npages); + if (ret) { + ibdev_err(ibdev, "failed to map sg mtr, ret = %d.\n", ret); + ret = 0; + } else { + mr->pbl_mtr.hem_cfg.buf_pg_shift = ilog2(ibmr->page_size); + ret = mr->npages; + } + +err_page_list: + kvfree(mr->page_list); + mr->page_list = NULL; + + return ret; +} + +static void hns_roce_mw_free(struct hns_roce_dev *hr_dev, + struct hns_roce_mw *mw) +{ + struct device *dev = hr_dev->dev; + int ret; + + if (mw->enabled) { + ret = hns_roce_hw_destroy_mpt(hr_dev, NULL, + key_to_hw_index(mw->rkey) & + (hr_dev->caps.num_mtpts - 1)); + if (ret) + dev_warn(dev, "MW DESTROY_MPT failed (%d)\n", ret); + + hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table, + key_to_hw_index(mw->rkey)); + } + + hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, + key_to_hw_index(mw->rkey), BITMAP_NO_RR); +} + +static int hns_roce_mw_enable(struct hns_roce_dev *hr_dev, + struct hns_roce_mw *mw) +{ + struct hns_roce_mr_table *mr_table = &hr_dev->mr_table; + struct hns_roce_cmd_mailbox *mailbox; + struct device *dev = hr_dev->dev; + unsigned long mtpt_idx = key_to_hw_index(mw->rkey); + int ret; + + /* prepare HEM entry memory */ + ret = hns_roce_table_get(hr_dev, &mr_table->mtpt_table, mtpt_idx); + if (ret) + return ret; + + mailbox = hns_roce_alloc_cmd_mailbox(hr_dev); + if (IS_ERR(mailbox)) { + ret = PTR_ERR(mailbox); + goto err_table; + } + + ret = hr_dev->hw->mw_write_mtpt(mailbox->buf, mw); + if (ret) { + dev_err(dev, "MW write mtpt fail!\n"); + goto err_page; + } + + ret = hns_roce_hw_create_mpt(hr_dev, mailbox, + mtpt_idx & (hr_dev->caps.num_mtpts - 1)); + if (ret) { + dev_err(dev, "MW CREATE_MPT failed (%d)\n", ret); + goto err_page; + } + + mw->enabled = 1; + + hns_roce_free_cmd_mailbox(hr_dev, mailbox); + + return 0; + +err_page: + hns_roce_free_cmd_mailbox(hr_dev, mailbox); + +err_table: + hns_roce_table_put(hr_dev, &mr_table->mtpt_table, mtpt_idx); + + return ret; +} + +int hns_roce_alloc_mw(struct ib_mw *ibmw, struct ib_udata *udata) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device); + struct hns_roce_mw *mw = to_hr_mw(ibmw); + unsigned long index = 0; + int ret; + + /* Allocate a key for mw from bitmap */ + ret = hns_roce_bitmap_alloc(&hr_dev->mr_table.mtpt_bitmap, &index); + if (ret) + return ret; + + mw->rkey = hw_index_to_key(index); + + ibmw->rkey = mw->rkey; + mw->pdn = to_hr_pd(ibmw->pd)->pdn; + mw->pbl_hop_num = hr_dev->caps.pbl_hop_num; + mw->pbl_ba_pg_sz = hr_dev->caps.pbl_ba_pg_sz; + mw->pbl_buf_pg_sz = hr_dev->caps.pbl_buf_pg_sz; + + ret = hns_roce_mw_enable(hr_dev, mw); + if (ret) + goto err_mw; + + return 0; + +err_mw: + hns_roce_mw_free(hr_dev, mw); + return ret; +} + +int hns_roce_dealloc_mw(struct ib_mw *ibmw) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device); + struct hns_roce_mw *mw = to_hr_mw(ibmw); + + hns_roce_mw_free(hr_dev, mw); + return 0; +} + +static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, + dma_addr_t *pages, struct hns_roce_buf_region *region) +{ + __le64 *mtts; + int offset; + int count; + int npage; + u64 addr; + int end; + int i; + + /* if hopnum is 0, buffer cannot store BAs, so skip write mtt */ + if (!region->hopnum) + return 0; + + offset = region->offset; + end = offset + region->count; + npage = 0; + while (offset < end) { + mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list, + offset, &count, NULL); + if (!mtts) + return -ENOBUFS; + + for (i = 0; i < count; i++) { + if (hr_dev->hw_rev == HNS_ROCE_HW_VER1) + addr = to_hr_hw_page_addr(pages[npage]); + else + addr = pages[npage]; + + mtts[i] = cpu_to_le64(addr); + npage++; + } + offset += count; + } + + return 0; +} + +static inline bool mtr_has_mtt(struct hns_roce_buf_attr *attr) +{ + int i; + + for (i = 0; i < attr->region_count; i++) + if (attr->region[i].hopnum != HNS_ROCE_HOP_NUM_0 && + attr->region[i].hopnum > 0) + return true; + + /* because the mtr only one root base address, when hopnum is 0 means + * root base address equals the first buffer address, thus all alloced + * memory must in a continuous space accessed by direct mode. + */ + return false; +} + +static inline size_t mtr_bufs_size(struct hns_roce_buf_attr *attr) +{ + size_t size = 0; + int i; + + for (i = 0; i < attr->region_count; i++) + size += attr->region[i].size; + + return size; +} + +static inline size_t mtr_kmem_direct_size(bool is_direct, size_t alloc_size, + unsigned int page_shift) +{ + if (is_direct) + return ALIGN(alloc_size, 1 << page_shift); + else + return HNS_HW_DIRECT_PAGE_COUNT << page_shift; +} + +/* + * check the given pages in continuous address space + * Returns 0 on success, or the error page num. + */ +static inline int mtr_check_direct_pages(dma_addr_t *pages, int page_count, + unsigned int page_shift) +{ + size_t page_size = 1 << page_shift; + int i; + + for (i = 1; i < page_count; i++) + if (pages[i] - pages[i - 1] != page_size) + return i; + + return 0; +} + +static void mtr_free_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr) +{ + /* release user buffers */ + if (mtr->umem) { + ib_umem_release(mtr->umem); + mtr->umem = NULL; + } + + /* release kernel buffers */ + if (mtr->kmem) { + hns_roce_buf_free(hr_dev, mtr->kmem); + kfree(mtr->kmem); + mtr->kmem = NULL; + } +} + +static int mtr_alloc_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, + struct hns_roce_buf_attr *buf_attr, bool is_direct, + struct ib_udata *udata, unsigned long user_addr) +{ + struct ib_device *ibdev = &hr_dev->ib_dev; + unsigned int best_pg_shift; + int all_pg_count = 0; + size_t direct_size; + size_t total_size; + int ret; + + total_size = mtr_bufs_size(buf_attr); + if (total_size < 1) { + ibdev_err(ibdev, "Failed to check mtr size\n"); + return -EINVAL; + } + + if (udata) { + unsigned long pgsz_bitmap; + unsigned long page_size; + + mtr->kmem = NULL; + mtr->umem = ib_umem_get(ibdev, user_addr, total_size, + buf_attr->user_access); + if (IS_ERR_OR_NULL(mtr->umem)) { + ibdev_err(ibdev, "Failed to get umem, ret %ld\n", + PTR_ERR(mtr->umem)); + return -ENOMEM; + } + if (buf_attr->fixed_page) + pgsz_bitmap = 1 << buf_attr->page_shift; + else + pgsz_bitmap = GENMASK(buf_attr->page_shift, PAGE_SHIFT); + + page_size = ib_umem_find_best_pgsz(mtr->umem, pgsz_bitmap, + user_addr); + if (!page_size) + return -EINVAL; + best_pg_shift = order_base_2(page_size); + all_pg_count = ib_umem_num_dma_blocks(mtr->umem, page_size); + ret = 0; + } else { + mtr->umem = NULL; + mtr->kmem = kzalloc(sizeof(*mtr->kmem), GFP_KERNEL); + if (!mtr->kmem) { + ibdev_err(ibdev, "Failed to alloc kmem\n"); + return -ENOMEM; + } + direct_size = mtr_kmem_direct_size(is_direct, total_size, + buf_attr->page_shift); + ret = hns_roce_buf_alloc(hr_dev, total_size, direct_size, + mtr->kmem, buf_attr->page_shift); + if (ret) { + ibdev_err(ibdev, "Failed to alloc kmem, ret %d\n", ret); + goto err_alloc_mem; + } + best_pg_shift = buf_attr->page_shift; + all_pg_count = mtr->kmem->npages; + } + + /* must bigger than minimum hardware page shift */ + if (best_pg_shift < HNS_HW_PAGE_SHIFT || all_pg_count < 1) { + ret = -EINVAL; + ibdev_err(ibdev, "Failed to check mtr page shift %d count %d\n", + best_pg_shift, all_pg_count); + goto err_alloc_mem; + } + + mtr->hem_cfg.buf_pg_shift = best_pg_shift; + mtr->hem_cfg.buf_pg_count = all_pg_count; + + return 0; +err_alloc_mem: + mtr_free_bufs(hr_dev, mtr); + return ret; +} + +static int mtr_get_pages(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, + dma_addr_t *pages, int count, unsigned int page_shift) +{ + struct ib_device *ibdev = &hr_dev->ib_dev; + int npage; + int err; + + if (mtr->umem) + npage = hns_roce_get_umem_bufs(hr_dev, pages, count, 0, + mtr->umem, page_shift); + else + npage = hns_roce_get_kmem_bufs(hr_dev, pages, count, 0, + mtr->kmem); + + if (mtr->hem_cfg.is_direct && npage > 1) { + err = mtr_check_direct_pages(pages, npage, page_shift); + if (err) { + ibdev_err(ibdev, "Failed to check %s direct page-%d\n", + mtr->umem ? "user" : "kernel", err); + npage = err; + } + } + + return npage; +} + +int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, + dma_addr_t *pages, int page_cnt) +{ + struct ib_device *ibdev = &hr_dev->ib_dev; + struct hns_roce_buf_region *r; + int err; + int i; + + /* + * Only use the first page address as root ba when hopnum is 0, this + * is because the addresses of all pages are consecutive in this case. + */ + if (mtr->hem_cfg.is_direct) { + mtr->hem_cfg.root_ba = pages[0]; + return 0; + } + + for (i = 0; i < mtr->hem_cfg.region_count; i++) { + r = &mtr->hem_cfg.region[i]; + if (r->offset + r->count > page_cnt) { + err = -EINVAL; + ibdev_err(ibdev, + "failed to check mtr%u end %u + %u, max %u.\n", + i, r->offset, r->count, page_cnt); + return err; + } + + err = mtr_map_region(hr_dev, mtr, &pages[r->offset], r); + if (err) { + ibdev_err(ibdev, + "failed to map mtr%u offset %u, ret = %d.\n", + i, r->offset, err); + return err; + } + } + + return 0; +} + +int hns_roce_mtr_find(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, + int offset, u64 *mtt_buf, int mtt_max, u64 *base_addr) +{ + struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg; + int start_index; + int mtt_count; + int total = 0; + __le64 *mtts; + int npage; + u64 addr; + int left; + + if (!mtt_buf || mtt_max < 1) + goto done; + + /* no mtt memory in direct mode, so just return the buffer address */ + if (cfg->is_direct) { + start_index = offset >> HNS_HW_PAGE_SHIFT; + for (mtt_count = 0; mtt_count < cfg->region_count && + total < mtt_max; mtt_count++) { + npage = cfg->region[mtt_count].offset; + if (npage < start_index) + continue; + + addr = cfg->root_ba + (npage << HNS_HW_PAGE_SHIFT); + if (hr_dev->hw_rev == HNS_ROCE_HW_VER1) + mtt_buf[total] = to_hr_hw_page_addr(addr); + else + mtt_buf[total] = addr; + + total++; + } + + goto done; + } + + start_index = offset >> cfg->buf_pg_shift; + left = mtt_max; + while (left > 0) { + mtt_count = 0; + mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list, + start_index + total, + &mtt_count, NULL); + if (!mtts || !mtt_count) + goto done; + + npage = min(mtt_count, left); + left -= npage; + for (mtt_count = 0; mtt_count < npage; mtt_count++) + mtt_buf[total++] = le64_to_cpu(mtts[mtt_count]); + } + +done: + if (base_addr) + *base_addr = cfg->root_ba; + + return total; +} + +static int mtr_init_buf_cfg(struct hns_roce_dev *hr_dev, + struct hns_roce_buf_attr *attr, + struct hns_roce_hem_cfg *cfg, + unsigned int *buf_page_shift) +{ + struct hns_roce_buf_region *r; + unsigned int page_shift; + int page_cnt = 0; + size_t buf_size; + int region_cnt; + + if (cfg->is_direct) { + buf_size = cfg->buf_pg_count << cfg->buf_pg_shift; + page_cnt = DIV_ROUND_UP(buf_size, HNS_HW_PAGE_SIZE); + /* + * When HEM buffer use level-0 addressing, the page size equals + * the buffer size, and the the page size = 4K * 2^N. + */ + cfg->buf_pg_shift = HNS_HW_PAGE_SHIFT + order_base_2(page_cnt); + if (attr->region_count > 1) { + cfg->buf_pg_count = page_cnt; + page_shift = HNS_HW_PAGE_SHIFT; + } else { + cfg->buf_pg_count = 1; + page_shift = cfg->buf_pg_shift; + if (buf_size != 1 << page_shift) { + ibdev_err(&hr_dev->ib_dev, + "failed to check direct size %zu shift %d.\n", + buf_size, page_shift); + return -EINVAL; + } + } + } else { + page_shift = cfg->buf_pg_shift; + } + + /* convert buffer size to page index and page count */ + for (page_cnt = 0, region_cnt = 0; page_cnt < cfg->buf_pg_count && + region_cnt < attr->region_count && + region_cnt < ARRAY_SIZE(cfg->region); region_cnt++) { + r = &cfg->region[region_cnt]; + r->offset = page_cnt; + buf_size = hr_hw_page_align(attr->region[region_cnt].size); + r->count = DIV_ROUND_UP(buf_size, 1 << page_shift); + page_cnt += r->count; + r->hopnum = to_hr_hem_hopnum(attr->region[region_cnt].hopnum, + r->count); + } + + if (region_cnt < 1) { + ibdev_err(&hr_dev->ib_dev, + "failed to check mtr region count, pages = %d.\n", + cfg->buf_pg_count); + return -ENOBUFS; + } + + cfg->region_count = region_cnt; + *buf_page_shift = page_shift; + + return page_cnt; +} + +/** + * hns_roce_mtr_create - Create hns memory translate region. + * + * @mtr: memory translate region + * @buf_attr: buffer attribute for creating mtr + * @ba_page_shift: page shift for multi-hop base address table + * @udata: user space context, if it's NULL, means kernel space + * @user_addr: userspace virtual address to start at + */ +int hns_roce_mtr_create(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, + struct hns_roce_buf_attr *buf_attr, + unsigned int ba_page_shift, struct ib_udata *udata, + unsigned long user_addr) +{ + struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg; + struct ib_device *ibdev = &hr_dev->ib_dev; + unsigned int buf_page_shift = 0; + dma_addr_t *pages = NULL; + int all_pg_cnt; + int get_pg_cnt; + int ret = 0; + + /* if disable mtt, all pages must in a continuous address range */ + cfg->is_direct = !mtr_has_mtt(buf_attr); + + /* if buffer only need mtt, just init the hem cfg */ + if (buf_attr->mtt_only) { + cfg->buf_pg_shift = buf_attr->page_shift; + cfg->buf_pg_count = mtr_bufs_size(buf_attr) >> + buf_attr->page_shift; + mtr->umem = NULL; + mtr->kmem = NULL; + } else { + ret = mtr_alloc_bufs(hr_dev, mtr, buf_attr, cfg->is_direct, + udata, user_addr); + if (ret) { + ibdev_err(ibdev, + "failed to alloc mtr bufs, ret = %d.\n", ret); + return ret; + } + } + + all_pg_cnt = mtr_init_buf_cfg(hr_dev, buf_attr, cfg, &buf_page_shift); + if (all_pg_cnt < 1) { + ret = -ENOBUFS; + ibdev_err(ibdev, "failed to init mtr buf cfg.\n"); + goto err_alloc_bufs; + } + + hns_roce_hem_list_init(&mtr->hem_list); + if (!cfg->is_direct) { + ret = hns_roce_hem_list_request(hr_dev, &mtr->hem_list, + cfg->region, cfg->region_count, + ba_page_shift); + if (ret) { + ibdev_err(ibdev, "failed to request mtr hem, ret = %d.\n", + ret); + goto err_alloc_bufs; + } + cfg->root_ba = mtr->hem_list.root_ba; + cfg->ba_pg_shift = ba_page_shift; + } else { + cfg->ba_pg_shift = cfg->buf_pg_shift; + } + + /* no buffer to map */ + if (buf_attr->mtt_only) + return 0; + + /* alloc a tmp array to store buffer's dma address */ + pages = kvcalloc(all_pg_cnt, sizeof(dma_addr_t), GFP_KERNEL); + if (!pages) { + ret = -ENOMEM; + ibdev_err(ibdev, "failed to alloc mtr page list %d.\n", + all_pg_cnt); + goto err_alloc_hem_list; + } + + get_pg_cnt = mtr_get_pages(hr_dev, mtr, pages, all_pg_cnt, + buf_page_shift); + if (get_pg_cnt != all_pg_cnt) { + ibdev_err(ibdev, "failed to get mtr page %d != %d.\n", + get_pg_cnt, all_pg_cnt); + ret = -ENOBUFS; + goto err_alloc_page_list; + } + + /* write buffer's dma address to BA table */ + ret = hns_roce_mtr_map(hr_dev, mtr, pages, all_pg_cnt); + if (ret) { + ibdev_err(ibdev, "failed to map mtr pages, ret = %d.\n", ret); + goto err_alloc_page_list; + } + + /* drop tmp array */ + kvfree(pages); + return 0; +err_alloc_page_list: + kvfree(pages); +err_alloc_hem_list: + hns_roce_hem_list_release(hr_dev, &mtr->hem_list); +err_alloc_bufs: + mtr_free_bufs(hr_dev, mtr); + return ret; +} + +void hns_roce_mtr_destroy(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr) +{ + /* release multi-hop addressing resource */ + hns_roce_hem_list_release(hr_dev, &mtr->hem_list); + + /* free buffers */ + mtr_free_bufs(hr_dev, mtr); +} |