diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 2970 |
1 files changed, 2970 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c new file mode 100644 index 000000000..dd4021b11 --- /dev/null +++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c @@ -0,0 +1,2970 @@ +/* This file is part of the Emulex RoCE Device Driver for + * RoCE (RDMA over Converged Ethernet) adapters. + * Copyright (C) 2012-2015 Emulex. All rights reserved. + * EMULEX and SLI are trademarks of Emulex. + * www.emulex.com + * + * 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 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Contact Information: + * linux-drivers@emulex.com + * + * Emulex + * 3333 Susan Street + * Costa Mesa, CA 92626 + */ + +#include <linux/dma-mapping.h> +#include <net/addrconf.h> +#include <rdma/ib_verbs.h> +#include <rdma/ib_user_verbs.h> +#include <rdma/iw_cm.h> +#include <rdma/ib_umem.h> +#include <rdma/ib_addr.h> +#include <rdma/ib_cache.h> +#include <rdma/uverbs_ioctl.h> + +#include "ocrdma.h" +#include "ocrdma_hw.h" +#include "ocrdma_verbs.h" +#include <rdma/ocrdma-abi.h> + +int ocrdma_query_pkey(struct ib_device *ibdev, u32 port, u16 index, u16 *pkey) +{ + if (index > 0) + return -EINVAL; + + *pkey = 0xffff; + return 0; +} + +int ocrdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr, + struct ib_udata *uhw) +{ + struct ocrdma_dev *dev = get_ocrdma_dev(ibdev); + + if (uhw->inlen || uhw->outlen) + return -EINVAL; + + memset(attr, 0, sizeof *attr); + memcpy(&attr->fw_ver, &dev->attr.fw_ver[0], + min(sizeof(dev->attr.fw_ver), sizeof(attr->fw_ver))); + addrconf_addr_eui48((u8 *)&attr->sys_image_guid, + dev->nic_info.mac_addr); + attr->max_mr_size = dev->attr.max_mr_size; + attr->page_size_cap = 0xffff000; + attr->vendor_id = dev->nic_info.pdev->vendor; + attr->vendor_part_id = dev->nic_info.pdev->device; + attr->hw_ver = dev->asic_id; + attr->max_qp = dev->attr.max_qp; + attr->max_ah = OCRDMA_MAX_AH; + attr->max_qp_wr = dev->attr.max_wqe; + + attr->device_cap_flags = IB_DEVICE_CURR_QP_STATE_MOD | + IB_DEVICE_RC_RNR_NAK_GEN | + IB_DEVICE_SHUTDOWN_PORT | + IB_DEVICE_SYS_IMAGE_GUID | + IB_DEVICE_MEM_MGT_EXTENSIONS; + attr->kernel_cap_flags = IBK_LOCAL_DMA_LKEY; + attr->max_send_sge = dev->attr.max_send_sge; + attr->max_recv_sge = dev->attr.max_recv_sge; + attr->max_sge_rd = dev->attr.max_rdma_sge; + attr->max_cq = dev->attr.max_cq; + attr->max_cqe = dev->attr.max_cqe; + attr->max_mr = dev->attr.max_mr; + attr->max_mw = dev->attr.max_mw; + attr->max_pd = dev->attr.max_pd; + attr->atomic_cap = 0; + attr->max_qp_rd_atom = + min(dev->attr.max_ord_per_qp, dev->attr.max_ird_per_qp); + attr->max_qp_init_rd_atom = dev->attr.max_ord_per_qp; + attr->max_srq = dev->attr.max_srq; + attr->max_srq_sge = dev->attr.max_srq_sge; + attr->max_srq_wr = dev->attr.max_rqe; + attr->local_ca_ack_delay = dev->attr.local_ca_ack_delay; + attr->max_fast_reg_page_list_len = dev->attr.max_pages_per_frmr; + attr->max_pkeys = 1; + return 0; +} + +static inline void get_link_speed_and_width(struct ocrdma_dev *dev, + u16 *ib_speed, u8 *ib_width) +{ + int status; + u8 speed; + + status = ocrdma_mbx_get_link_speed(dev, &speed, NULL); + if (status) + speed = OCRDMA_PHYS_LINK_SPEED_ZERO; + + switch (speed) { + case OCRDMA_PHYS_LINK_SPEED_1GBPS: + *ib_speed = IB_SPEED_SDR; + *ib_width = IB_WIDTH_1X; + break; + + case OCRDMA_PHYS_LINK_SPEED_10GBPS: + *ib_speed = IB_SPEED_QDR; + *ib_width = IB_WIDTH_1X; + break; + + case OCRDMA_PHYS_LINK_SPEED_20GBPS: + *ib_speed = IB_SPEED_DDR; + *ib_width = IB_WIDTH_4X; + break; + + case OCRDMA_PHYS_LINK_SPEED_40GBPS: + *ib_speed = IB_SPEED_QDR; + *ib_width = IB_WIDTH_4X; + break; + + default: + /* Unsupported */ + *ib_speed = IB_SPEED_SDR; + *ib_width = IB_WIDTH_1X; + } +} + +int ocrdma_query_port(struct ib_device *ibdev, + u32 port, struct ib_port_attr *props) +{ + enum ib_port_state port_state; + struct ocrdma_dev *dev; + struct net_device *netdev; + + /* props being zeroed by the caller, avoid zeroing it here */ + dev = get_ocrdma_dev(ibdev); + netdev = dev->nic_info.netdev; + if (netif_running(netdev) && netif_oper_up(netdev)) { + port_state = IB_PORT_ACTIVE; + props->phys_state = IB_PORT_PHYS_STATE_LINK_UP; + } else { + port_state = IB_PORT_DOWN; + props->phys_state = IB_PORT_PHYS_STATE_DISABLED; + } + props->max_mtu = IB_MTU_4096; + props->active_mtu = iboe_get_mtu(netdev->mtu); + props->lid = 0; + props->lmc = 0; + props->sm_lid = 0; + props->sm_sl = 0; + props->state = port_state; + props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP | + IB_PORT_DEVICE_MGMT_SUP | + IB_PORT_VENDOR_CLASS_SUP; + props->ip_gids = true; + props->gid_tbl_len = OCRDMA_MAX_SGID; + props->pkey_tbl_len = 1; + props->bad_pkey_cntr = 0; + props->qkey_viol_cntr = 0; + get_link_speed_and_width(dev, &props->active_speed, + &props->active_width); + props->max_msg_sz = 0x80000000; + props->max_vl_num = 4; + return 0; +} + +static int ocrdma_add_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr, + unsigned long len) +{ + struct ocrdma_mm *mm; + + mm = kzalloc(sizeof(*mm), GFP_KERNEL); + if (mm == NULL) + return -ENOMEM; + mm->key.phy_addr = phy_addr; + mm->key.len = len; + INIT_LIST_HEAD(&mm->entry); + + mutex_lock(&uctx->mm_list_lock); + list_add_tail(&mm->entry, &uctx->mm_head); + mutex_unlock(&uctx->mm_list_lock); + return 0; +} + +static void ocrdma_del_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr, + unsigned long len) +{ + struct ocrdma_mm *mm, *tmp; + + mutex_lock(&uctx->mm_list_lock); + list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) { + if (len != mm->key.len && phy_addr != mm->key.phy_addr) + continue; + + list_del(&mm->entry); + kfree(mm); + break; + } + mutex_unlock(&uctx->mm_list_lock); +} + +static bool ocrdma_search_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr, + unsigned long len) +{ + bool found = false; + struct ocrdma_mm *mm; + + mutex_lock(&uctx->mm_list_lock); + list_for_each_entry(mm, &uctx->mm_head, entry) { + if (len != mm->key.len && phy_addr != mm->key.phy_addr) + continue; + + found = true; + break; + } + mutex_unlock(&uctx->mm_list_lock); + return found; +} + + +static u16 _ocrdma_pd_mgr_get_bitmap(struct ocrdma_dev *dev, bool dpp_pool) +{ + u16 pd_bitmap_idx = 0; + unsigned long *pd_bitmap; + + if (dpp_pool) { + pd_bitmap = dev->pd_mgr->pd_dpp_bitmap; + pd_bitmap_idx = find_first_zero_bit(pd_bitmap, + dev->pd_mgr->max_dpp_pd); + __set_bit(pd_bitmap_idx, pd_bitmap); + dev->pd_mgr->pd_dpp_count++; + if (dev->pd_mgr->pd_dpp_count > dev->pd_mgr->pd_dpp_thrsh) + dev->pd_mgr->pd_dpp_thrsh = dev->pd_mgr->pd_dpp_count; + } else { + pd_bitmap = dev->pd_mgr->pd_norm_bitmap; + pd_bitmap_idx = find_first_zero_bit(pd_bitmap, + dev->pd_mgr->max_normal_pd); + __set_bit(pd_bitmap_idx, pd_bitmap); + dev->pd_mgr->pd_norm_count++; + if (dev->pd_mgr->pd_norm_count > dev->pd_mgr->pd_norm_thrsh) + dev->pd_mgr->pd_norm_thrsh = dev->pd_mgr->pd_norm_count; + } + return pd_bitmap_idx; +} + +static int _ocrdma_pd_mgr_put_bitmap(struct ocrdma_dev *dev, u16 pd_id, + bool dpp_pool) +{ + u16 pd_count; + u16 pd_bit_index; + + pd_count = dpp_pool ? dev->pd_mgr->pd_dpp_count : + dev->pd_mgr->pd_norm_count; + if (pd_count == 0) + return -EINVAL; + + if (dpp_pool) { + pd_bit_index = pd_id - dev->pd_mgr->pd_dpp_start; + if (pd_bit_index >= dev->pd_mgr->max_dpp_pd) { + return -EINVAL; + } else { + __clear_bit(pd_bit_index, dev->pd_mgr->pd_dpp_bitmap); + dev->pd_mgr->pd_dpp_count--; + } + } else { + pd_bit_index = pd_id - dev->pd_mgr->pd_norm_start; + if (pd_bit_index >= dev->pd_mgr->max_normal_pd) { + return -EINVAL; + } else { + __clear_bit(pd_bit_index, dev->pd_mgr->pd_norm_bitmap); + dev->pd_mgr->pd_norm_count--; + } + } + + return 0; +} + +static int ocrdma_put_pd_num(struct ocrdma_dev *dev, u16 pd_id, + bool dpp_pool) +{ + int status; + + mutex_lock(&dev->dev_lock); + status = _ocrdma_pd_mgr_put_bitmap(dev, pd_id, dpp_pool); + mutex_unlock(&dev->dev_lock); + return status; +} + +static int ocrdma_get_pd_num(struct ocrdma_dev *dev, struct ocrdma_pd *pd) +{ + u16 pd_idx = 0; + int status = 0; + + mutex_lock(&dev->dev_lock); + if (pd->dpp_enabled) { + /* try allocating DPP PD, if not available then normal PD */ + if (dev->pd_mgr->pd_dpp_count < dev->pd_mgr->max_dpp_pd) { + pd_idx = _ocrdma_pd_mgr_get_bitmap(dev, true); + pd->id = dev->pd_mgr->pd_dpp_start + pd_idx; + pd->dpp_page = dev->pd_mgr->dpp_page_index + pd_idx; + } else if (dev->pd_mgr->pd_norm_count < + dev->pd_mgr->max_normal_pd) { + pd_idx = _ocrdma_pd_mgr_get_bitmap(dev, false); + pd->id = dev->pd_mgr->pd_norm_start + pd_idx; + pd->dpp_enabled = false; + } else { + status = -EINVAL; + } + } else { + if (dev->pd_mgr->pd_norm_count < dev->pd_mgr->max_normal_pd) { + pd_idx = _ocrdma_pd_mgr_get_bitmap(dev, false); + pd->id = dev->pd_mgr->pd_norm_start + pd_idx; + } else { + status = -EINVAL; + } + } + mutex_unlock(&dev->dev_lock); + return status; +} + +/* + * NOTE: + * + * ocrdma_ucontext must be used here because this function is also + * called from ocrdma_alloc_ucontext where ib_udata does not have + * valid ib_ucontext pointer. ib_uverbs_get_context does not call + * uobj_{alloc|get_xxx} helpers which are used to store the + * ib_ucontext in uverbs_attr_bundle wrapping the ib_udata. so + * ib_udata does NOT imply valid ib_ucontext here! + */ +static int _ocrdma_alloc_pd(struct ocrdma_dev *dev, struct ocrdma_pd *pd, + struct ocrdma_ucontext *uctx, + struct ib_udata *udata) +{ + int status; + + if (udata && uctx && dev->attr.max_dpp_pds) { + pd->dpp_enabled = + ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R; + pd->num_dpp_qp = + pd->dpp_enabled ? (dev->nic_info.db_page_size / + dev->attr.wqe_size) : 0; + } + + if (dev->pd_mgr->pd_prealloc_valid) + return ocrdma_get_pd_num(dev, pd); + +retry: + status = ocrdma_mbx_alloc_pd(dev, pd); + if (status) { + if (pd->dpp_enabled) { + pd->dpp_enabled = false; + pd->num_dpp_qp = 0; + goto retry; + } + return status; + } + + return 0; +} + +static inline int is_ucontext_pd(struct ocrdma_ucontext *uctx, + struct ocrdma_pd *pd) +{ + return (uctx->cntxt_pd == pd); +} + +static void _ocrdma_dealloc_pd(struct ocrdma_dev *dev, + struct ocrdma_pd *pd) +{ + if (dev->pd_mgr->pd_prealloc_valid) + ocrdma_put_pd_num(dev, pd->id, pd->dpp_enabled); + else + ocrdma_mbx_dealloc_pd(dev, pd); +} + +static int ocrdma_alloc_ucontext_pd(struct ocrdma_dev *dev, + struct ocrdma_ucontext *uctx, + struct ib_udata *udata) +{ + struct ib_device *ibdev = &dev->ibdev; + struct ib_pd *pd; + int status; + + pd = rdma_zalloc_drv_obj(ibdev, ib_pd); + if (!pd) + return -ENOMEM; + + pd->device = ibdev; + uctx->cntxt_pd = get_ocrdma_pd(pd); + + status = _ocrdma_alloc_pd(dev, uctx->cntxt_pd, uctx, udata); + if (status) { + kfree(uctx->cntxt_pd); + goto err; + } + + uctx->cntxt_pd->uctx = uctx; + uctx->cntxt_pd->ibpd.device = &dev->ibdev; +err: + return status; +} + +static void ocrdma_dealloc_ucontext_pd(struct ocrdma_ucontext *uctx) +{ + struct ocrdma_pd *pd = uctx->cntxt_pd; + struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device); + + if (uctx->pd_in_use) { + pr_err("%s(%d) Freeing in use pdid=0x%x.\n", + __func__, dev->id, pd->id); + } + uctx->cntxt_pd = NULL; + _ocrdma_dealloc_pd(dev, pd); + kfree(pd); +} + +static struct ocrdma_pd *ocrdma_get_ucontext_pd(struct ocrdma_ucontext *uctx) +{ + struct ocrdma_pd *pd = NULL; + + mutex_lock(&uctx->mm_list_lock); + if (!uctx->pd_in_use) { + uctx->pd_in_use = true; + pd = uctx->cntxt_pd; + } + mutex_unlock(&uctx->mm_list_lock); + + return pd; +} + +static void ocrdma_release_ucontext_pd(struct ocrdma_ucontext *uctx) +{ + mutex_lock(&uctx->mm_list_lock); + uctx->pd_in_use = false; + mutex_unlock(&uctx->mm_list_lock); +} + +int ocrdma_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata) +{ + struct ib_device *ibdev = uctx->device; + int status; + struct ocrdma_ucontext *ctx = get_ocrdma_ucontext(uctx); + struct ocrdma_alloc_ucontext_resp resp = {}; + struct ocrdma_dev *dev = get_ocrdma_dev(ibdev); + struct pci_dev *pdev = dev->nic_info.pdev; + u32 map_len = roundup(sizeof(u32) * 2048, PAGE_SIZE); + + if (!udata) + return -EFAULT; + INIT_LIST_HEAD(&ctx->mm_head); + mutex_init(&ctx->mm_list_lock); + + ctx->ah_tbl.va = dma_alloc_coherent(&pdev->dev, map_len, + &ctx->ah_tbl.pa, GFP_KERNEL); + if (!ctx->ah_tbl.va) + return -ENOMEM; + + ctx->ah_tbl.len = map_len; + + resp.ah_tbl_len = ctx->ah_tbl.len; + resp.ah_tbl_page = virt_to_phys(ctx->ah_tbl.va); + + status = ocrdma_add_mmap(ctx, resp.ah_tbl_page, resp.ah_tbl_len); + if (status) + goto map_err; + + status = ocrdma_alloc_ucontext_pd(dev, ctx, udata); + if (status) + goto pd_err; + + resp.dev_id = dev->id; + resp.max_inline_data = dev->attr.max_inline_data; + resp.wqe_size = dev->attr.wqe_size; + resp.rqe_size = dev->attr.rqe_size; + resp.dpp_wqe_size = dev->attr.wqe_size; + + memcpy(resp.fw_ver, dev->attr.fw_ver, sizeof(resp.fw_ver)); + status = ib_copy_to_udata(udata, &resp, sizeof(resp)); + if (status) + goto cpy_err; + return 0; + +cpy_err: + ocrdma_dealloc_ucontext_pd(ctx); +pd_err: + ocrdma_del_mmap(ctx, ctx->ah_tbl.pa, ctx->ah_tbl.len); +map_err: + dma_free_coherent(&pdev->dev, ctx->ah_tbl.len, ctx->ah_tbl.va, + ctx->ah_tbl.pa); + return status; +} + +void ocrdma_dealloc_ucontext(struct ib_ucontext *ibctx) +{ + struct ocrdma_mm *mm, *tmp; + struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ibctx); + struct ocrdma_dev *dev = get_ocrdma_dev(ibctx->device); + struct pci_dev *pdev = dev->nic_info.pdev; + + ocrdma_dealloc_ucontext_pd(uctx); + + ocrdma_del_mmap(uctx, uctx->ah_tbl.pa, uctx->ah_tbl.len); + dma_free_coherent(&pdev->dev, uctx->ah_tbl.len, uctx->ah_tbl.va, + uctx->ah_tbl.pa); + + list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) { + list_del(&mm->entry); + kfree(mm); + } +} + +int ocrdma_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) +{ + struct ocrdma_ucontext *ucontext = get_ocrdma_ucontext(context); + struct ocrdma_dev *dev = get_ocrdma_dev(context->device); + unsigned long vm_page = vma->vm_pgoff << PAGE_SHIFT; + u64 unmapped_db = (u64) dev->nic_info.unmapped_db; + unsigned long len = (vma->vm_end - vma->vm_start); + int status; + bool found; + + if (vma->vm_start & (PAGE_SIZE - 1)) + return -EINVAL; + found = ocrdma_search_mmap(ucontext, vma->vm_pgoff << PAGE_SHIFT, len); + if (!found) + return -EINVAL; + + if ((vm_page >= unmapped_db) && (vm_page <= (unmapped_db + + dev->nic_info.db_total_size)) && + (len <= dev->nic_info.db_page_size)) { + if (vma->vm_flags & VM_READ) + return -EPERM; + + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, + len, vma->vm_page_prot); + } else if (dev->nic_info.dpp_unmapped_len && + (vm_page >= (u64) dev->nic_info.dpp_unmapped_addr) && + (vm_page <= (u64) (dev->nic_info.dpp_unmapped_addr + + dev->nic_info.dpp_unmapped_len)) && + (len <= dev->nic_info.dpp_unmapped_len)) { + if (vma->vm_flags & VM_READ) + return -EPERM; + + vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); + status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, + len, vma->vm_page_prot); + } else { + status = remap_pfn_range(vma, vma->vm_start, + vma->vm_pgoff, len, vma->vm_page_prot); + } + return status; +} + +static int ocrdma_copy_pd_uresp(struct ocrdma_dev *dev, struct ocrdma_pd *pd, + struct ib_udata *udata) +{ + int status; + u64 db_page_addr; + u64 dpp_page_addr = 0; + u32 db_page_size; + struct ocrdma_alloc_pd_uresp rsp; + struct ocrdma_ucontext *uctx = rdma_udata_to_drv_context( + udata, struct ocrdma_ucontext, ibucontext); + + memset(&rsp, 0, sizeof(rsp)); + rsp.id = pd->id; + rsp.dpp_enabled = pd->dpp_enabled; + db_page_addr = ocrdma_get_db_addr(dev, pd->id); + db_page_size = dev->nic_info.db_page_size; + + status = ocrdma_add_mmap(uctx, db_page_addr, db_page_size); + if (status) + return status; + + if (pd->dpp_enabled) { + dpp_page_addr = dev->nic_info.dpp_unmapped_addr + + (pd->id * PAGE_SIZE); + status = ocrdma_add_mmap(uctx, dpp_page_addr, + PAGE_SIZE); + if (status) + goto dpp_map_err; + rsp.dpp_page_addr_hi = upper_32_bits(dpp_page_addr); + rsp.dpp_page_addr_lo = dpp_page_addr; + } + + status = ib_copy_to_udata(udata, &rsp, sizeof(rsp)); + if (status) + goto ucopy_err; + + pd->uctx = uctx; + return 0; + +ucopy_err: + if (pd->dpp_enabled) + ocrdma_del_mmap(pd->uctx, dpp_page_addr, PAGE_SIZE); +dpp_map_err: + ocrdma_del_mmap(pd->uctx, db_page_addr, db_page_size); + return status; +} + +int ocrdma_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +{ + struct ib_device *ibdev = ibpd->device; + struct ocrdma_dev *dev = get_ocrdma_dev(ibdev); + struct ocrdma_pd *pd; + int status; + u8 is_uctx_pd = false; + struct ocrdma_ucontext *uctx = rdma_udata_to_drv_context( + udata, struct ocrdma_ucontext, ibucontext); + + if (udata) { + pd = ocrdma_get_ucontext_pd(uctx); + if (pd) { + is_uctx_pd = true; + goto pd_mapping; + } + } + + pd = get_ocrdma_pd(ibpd); + status = _ocrdma_alloc_pd(dev, pd, uctx, udata); + if (status) + goto exit; + +pd_mapping: + if (udata) { + status = ocrdma_copy_pd_uresp(dev, pd, udata); + if (status) + goto err; + } + return 0; + +err: + if (is_uctx_pd) + ocrdma_release_ucontext_pd(uctx); + else + _ocrdma_dealloc_pd(dev, pd); +exit: + return status; +} + +int ocrdma_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +{ + struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); + struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device); + struct ocrdma_ucontext *uctx = NULL; + u64 usr_db; + + uctx = pd->uctx; + if (uctx) { + u64 dpp_db = dev->nic_info.dpp_unmapped_addr + + (pd->id * PAGE_SIZE); + if (pd->dpp_enabled) + ocrdma_del_mmap(pd->uctx, dpp_db, PAGE_SIZE); + usr_db = ocrdma_get_db_addr(dev, pd->id); + ocrdma_del_mmap(pd->uctx, usr_db, dev->nic_info.db_page_size); + + if (is_ucontext_pd(uctx, pd)) { + ocrdma_release_ucontext_pd(uctx); + return 0; + } + } + _ocrdma_dealloc_pd(dev, pd); + return 0; +} + +static int ocrdma_alloc_lkey(struct ocrdma_dev *dev, struct ocrdma_mr *mr, + u32 pdid, int acc, u32 num_pbls, u32 addr_check) +{ + int status; + + mr->hwmr.fr_mr = 0; + mr->hwmr.local_rd = 1; + mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0; + mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0; + mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0; + mr->hwmr.mw_bind = (acc & IB_ACCESS_MW_BIND) ? 1 : 0; + mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0; + mr->hwmr.num_pbls = num_pbls; + + status = ocrdma_mbx_alloc_lkey(dev, &mr->hwmr, pdid, addr_check); + if (status) + return status; + + mr->ibmr.lkey = mr->hwmr.lkey; + if (mr->hwmr.remote_wr || mr->hwmr.remote_rd) + mr->ibmr.rkey = mr->hwmr.lkey; + return 0; +} + +struct ib_mr *ocrdma_get_dma_mr(struct ib_pd *ibpd, int acc) +{ + int status; + struct ocrdma_mr *mr; + struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); + struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device); + + if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE)) { + pr_err("%s err, invalid access rights\n", __func__); + return ERR_PTR(-EINVAL); + } + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + status = ocrdma_alloc_lkey(dev, mr, pd->id, acc, 0, + OCRDMA_ADDR_CHECK_DISABLE); + if (status) { + kfree(mr); + return ERR_PTR(status); + } + + return &mr->ibmr; +} + +static void ocrdma_free_mr_pbl_tbl(struct ocrdma_dev *dev, + struct ocrdma_hw_mr *mr) +{ + struct pci_dev *pdev = dev->nic_info.pdev; + int i = 0; + + if (mr->pbl_table) { + for (i = 0; i < mr->num_pbls; i++) { + if (!mr->pbl_table[i].va) + continue; + dma_free_coherent(&pdev->dev, mr->pbl_size, + mr->pbl_table[i].va, + mr->pbl_table[i].pa); + } + kfree(mr->pbl_table); + mr->pbl_table = NULL; + } +} + +static int ocrdma_get_pbl_info(struct ocrdma_dev *dev, struct ocrdma_mr *mr, + u32 num_pbes) +{ + u32 num_pbls = 0; + u32 idx = 0; + int status = 0; + u32 pbl_size; + + do { + pbl_size = OCRDMA_MIN_HPAGE_SIZE * (1 << idx); + if (pbl_size > MAX_OCRDMA_PBL_SIZE) { + status = -EFAULT; + break; + } + num_pbls = roundup(num_pbes, (pbl_size / sizeof(u64))); + num_pbls = num_pbls / (pbl_size / sizeof(u64)); + idx++; + } while (num_pbls >= dev->attr.max_num_mr_pbl); + + mr->hwmr.num_pbes = num_pbes; + mr->hwmr.num_pbls = num_pbls; + mr->hwmr.pbl_size = pbl_size; + return status; +} + +static int ocrdma_build_pbl_tbl(struct ocrdma_dev *dev, struct ocrdma_hw_mr *mr) +{ + int status = 0; + int i; + u32 dma_len = mr->pbl_size; + struct pci_dev *pdev = dev->nic_info.pdev; + void *va; + dma_addr_t pa; + + mr->pbl_table = kcalloc(mr->num_pbls, sizeof(struct ocrdma_pbl), + GFP_KERNEL); + + if (!mr->pbl_table) + return -ENOMEM; + + for (i = 0; i < mr->num_pbls; i++) { + va = dma_alloc_coherent(&pdev->dev, dma_len, &pa, GFP_KERNEL); + if (!va) { + ocrdma_free_mr_pbl_tbl(dev, mr); + status = -ENOMEM; + break; + } + mr->pbl_table[i].va = va; + mr->pbl_table[i].pa = pa; + } + return status; +} + +static void build_user_pbes(struct ocrdma_dev *dev, struct ocrdma_mr *mr) +{ + struct ocrdma_pbe *pbe; + struct ib_block_iter biter; + struct ocrdma_pbl *pbl_tbl = mr->hwmr.pbl_table; + int pbe_cnt; + u64 pg_addr; + + if (!mr->hwmr.num_pbes) + return; + + pbe = (struct ocrdma_pbe *)pbl_tbl->va; + pbe_cnt = 0; + + rdma_umem_for_each_dma_block (mr->umem, &biter, PAGE_SIZE) { + /* store the page address in pbe */ + pg_addr = rdma_block_iter_dma_address(&biter); + pbe->pa_lo = cpu_to_le32(pg_addr); + pbe->pa_hi = cpu_to_le32(upper_32_bits(pg_addr)); + pbe_cnt += 1; + pbe++; + + /* if the given pbl is full storing the pbes, + * move to next pbl. + */ + if (pbe_cnt == (mr->hwmr.pbl_size / sizeof(u64))) { + pbl_tbl++; + pbe = (struct ocrdma_pbe *)pbl_tbl->va; + pbe_cnt = 0; + } + } +} + +struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len, + u64 usr_addr, int acc, struct ib_udata *udata) +{ + int status = -ENOMEM; + struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device); + struct ocrdma_mr *mr; + struct ocrdma_pd *pd; + + pd = get_ocrdma_pd(ibpd); + + if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE)) + return ERR_PTR(-EINVAL); + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(status); + mr->umem = ib_umem_get(ibpd->device, start, len, acc); + if (IS_ERR(mr->umem)) { + status = -EFAULT; + goto umem_err; + } + status = ocrdma_get_pbl_info( + dev, mr, ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE)); + if (status) + goto umem_err; + + mr->hwmr.pbe_size = PAGE_SIZE; + mr->hwmr.va = usr_addr; + mr->hwmr.len = len; + mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0; + mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0; + mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0; + mr->hwmr.local_rd = 1; + mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0; + status = ocrdma_build_pbl_tbl(dev, &mr->hwmr); + if (status) + goto umem_err; + build_user_pbes(dev, mr); + status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, acc); + if (status) + goto mbx_err; + mr->ibmr.lkey = mr->hwmr.lkey; + if (mr->hwmr.remote_wr || mr->hwmr.remote_rd) + mr->ibmr.rkey = mr->hwmr.lkey; + + return &mr->ibmr; + +mbx_err: + ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr); +umem_err: + kfree(mr); + return ERR_PTR(status); +} + +int ocrdma_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata) +{ + struct ocrdma_mr *mr = get_ocrdma_mr(ib_mr); + struct ocrdma_dev *dev = get_ocrdma_dev(ib_mr->device); + + (void) ocrdma_mbx_dealloc_lkey(dev, mr->hwmr.fr_mr, mr->hwmr.lkey); + + kfree(mr->pages); + ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr); + + /* it could be user registered memory. */ + ib_umem_release(mr->umem); + kfree(mr); + + /* Don't stop cleanup, in case FW is unresponsive */ + if (dev->mqe_ctx.fw_error_state) { + pr_err("%s(%d) fw not responding.\n", + __func__, dev->id); + } + return 0; +} + +static int ocrdma_copy_cq_uresp(struct ocrdma_dev *dev, struct ocrdma_cq *cq, + struct ib_udata *udata) +{ + int status; + struct ocrdma_ucontext *uctx = rdma_udata_to_drv_context( + udata, struct ocrdma_ucontext, ibucontext); + struct ocrdma_create_cq_uresp uresp; + + /* this must be user flow! */ + if (!udata) + return -EINVAL; + + memset(&uresp, 0, sizeof(uresp)); + uresp.cq_id = cq->id; + uresp.page_size = PAGE_ALIGN(cq->len); + uresp.num_pages = 1; + uresp.max_hw_cqe = cq->max_hw_cqe; + uresp.page_addr[0] = virt_to_phys(cq->va); + uresp.db_page_addr = ocrdma_get_db_addr(dev, uctx->cntxt_pd->id); + uresp.db_page_size = dev->nic_info.db_page_size; + uresp.phase_change = cq->phase_change ? 1 : 0; + status = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); + if (status) { + pr_err("%s(%d) copy error cqid=0x%x.\n", + __func__, dev->id, cq->id); + goto err; + } + status = ocrdma_add_mmap(uctx, uresp.db_page_addr, uresp.db_page_size); + if (status) + goto err; + status = ocrdma_add_mmap(uctx, uresp.page_addr[0], uresp.page_size); + if (status) { + ocrdma_del_mmap(uctx, uresp.db_page_addr, uresp.db_page_size); + goto err; + } + cq->ucontext = uctx; +err: + return status; +} + +int ocrdma_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 ocrdma_cq *cq = get_ocrdma_cq(ibcq); + struct ocrdma_dev *dev = get_ocrdma_dev(ibdev); + struct ocrdma_ucontext *uctx = rdma_udata_to_drv_context( + udata, struct ocrdma_ucontext, ibucontext); + u16 pd_id = 0; + int status; + struct ocrdma_create_cq_ureq ureq; + + if (attr->flags) + return -EOPNOTSUPP; + + if (udata) { + if (ib_copy_from_udata(&ureq, udata, sizeof(ureq))) + return -EFAULT; + } else + ureq.dpp_cq = 0; + + spin_lock_init(&cq->cq_lock); + spin_lock_init(&cq->comp_handler_lock); + INIT_LIST_HEAD(&cq->sq_head); + INIT_LIST_HEAD(&cq->rq_head); + + if (udata) + pd_id = uctx->cntxt_pd->id; + + status = ocrdma_mbx_create_cq(dev, cq, entries, ureq.dpp_cq, pd_id); + if (status) + return status; + + if (udata) { + status = ocrdma_copy_cq_uresp(dev, cq, udata); + if (status) + goto ctx_err; + } + cq->phase = OCRDMA_CQE_VALID; + dev->cq_tbl[cq->id] = cq; + return 0; + +ctx_err: + ocrdma_mbx_destroy_cq(dev, cq); + return status; +} + +int ocrdma_resize_cq(struct ib_cq *ibcq, int new_cnt, + struct ib_udata *udata) +{ + int status = 0; + struct ocrdma_cq *cq = get_ocrdma_cq(ibcq); + + if (new_cnt < 1 || new_cnt > cq->max_hw_cqe) { + status = -EINVAL; + return status; + } + ibcq->cqe = new_cnt; + return status; +} + +static void ocrdma_flush_cq(struct ocrdma_cq *cq) +{ + int cqe_cnt; + int valid_count = 0; + unsigned long flags; + + struct ocrdma_dev *dev = get_ocrdma_dev(cq->ibcq.device); + struct ocrdma_cqe *cqe = NULL; + + cqe = cq->va; + cqe_cnt = cq->cqe_cnt; + + /* Last irq might have scheduled a polling thread + * sync-up with it before hard flushing. + */ + spin_lock_irqsave(&cq->cq_lock, flags); + while (cqe_cnt) { + if (is_cqe_valid(cq, cqe)) + valid_count++; + cqe++; + cqe_cnt--; + } + ocrdma_ring_cq_db(dev, cq->id, false, false, valid_count); + spin_unlock_irqrestore(&cq->cq_lock, flags); +} + +int ocrdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata) +{ + struct ocrdma_cq *cq = get_ocrdma_cq(ibcq); + struct ocrdma_eq *eq = NULL; + struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device); + int pdid = 0; + u32 irq, indx; + + dev->cq_tbl[cq->id] = NULL; + indx = ocrdma_get_eq_table_index(dev, cq->eqn); + + eq = &dev->eq_tbl[indx]; + irq = ocrdma_get_irq(dev, eq); + synchronize_irq(irq); + ocrdma_flush_cq(cq); + + ocrdma_mbx_destroy_cq(dev, cq); + if (cq->ucontext) { + pdid = cq->ucontext->cntxt_pd->id; + ocrdma_del_mmap(cq->ucontext, (u64) cq->pa, + PAGE_ALIGN(cq->len)); + ocrdma_del_mmap(cq->ucontext, + ocrdma_get_db_addr(dev, pdid), + dev->nic_info.db_page_size); + } + return 0; +} + +static int ocrdma_add_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp) +{ + int status = -EINVAL; + + if (qp->id < OCRDMA_MAX_QP && dev->qp_tbl[qp->id] == NULL) { + dev->qp_tbl[qp->id] = qp; + status = 0; + } + return status; +} + +static void ocrdma_del_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp) +{ + dev->qp_tbl[qp->id] = NULL; +} + +static int ocrdma_check_qp_params(struct ib_pd *ibpd, struct ocrdma_dev *dev, + struct ib_qp_init_attr *attrs, + struct ib_udata *udata) +{ + if ((attrs->qp_type != IB_QPT_GSI) && + (attrs->qp_type != IB_QPT_RC) && + (attrs->qp_type != IB_QPT_UC) && + (attrs->qp_type != IB_QPT_UD)) { + pr_err("%s(%d) unsupported qp type=0x%x requested\n", + __func__, dev->id, attrs->qp_type); + return -EOPNOTSUPP; + } + /* Skip the check for QP1 to support CM size of 128 */ + if ((attrs->qp_type != IB_QPT_GSI) && + (attrs->cap.max_send_wr > dev->attr.max_wqe)) { + pr_err("%s(%d) unsupported send_wr=0x%x requested\n", + __func__, dev->id, attrs->cap.max_send_wr); + pr_err("%s(%d) supported send_wr=0x%x\n", + __func__, dev->id, dev->attr.max_wqe); + return -EINVAL; + } + if (!attrs->srq && (attrs->cap.max_recv_wr > dev->attr.max_rqe)) { + pr_err("%s(%d) unsupported recv_wr=0x%x requested\n", + __func__, dev->id, attrs->cap.max_recv_wr); + pr_err("%s(%d) supported recv_wr=0x%x\n", + __func__, dev->id, dev->attr.max_rqe); + return -EINVAL; + } + if (attrs->cap.max_inline_data > dev->attr.max_inline_data) { + pr_err("%s(%d) unsupported inline data size=0x%x requested\n", + __func__, dev->id, attrs->cap.max_inline_data); + pr_err("%s(%d) supported inline data size=0x%x\n", + __func__, dev->id, dev->attr.max_inline_data); + return -EINVAL; + } + if (attrs->cap.max_send_sge > dev->attr.max_send_sge) { + pr_err("%s(%d) unsupported send_sge=0x%x requested\n", + __func__, dev->id, attrs->cap.max_send_sge); + pr_err("%s(%d) supported send_sge=0x%x\n", + __func__, dev->id, dev->attr.max_send_sge); + return -EINVAL; + } + if (attrs->cap.max_recv_sge > dev->attr.max_recv_sge) { + pr_err("%s(%d) unsupported recv_sge=0x%x requested\n", + __func__, dev->id, attrs->cap.max_recv_sge); + pr_err("%s(%d) supported recv_sge=0x%x\n", + __func__, dev->id, dev->attr.max_recv_sge); + return -EINVAL; + } + /* unprivileged user space cannot create special QP */ + if (udata && attrs->qp_type == IB_QPT_GSI) { + pr_err + ("%s(%d) Userspace can't create special QPs of type=0x%x\n", + __func__, dev->id, attrs->qp_type); + return -EINVAL; + } + /* allow creating only one GSI type of QP */ + if (attrs->qp_type == IB_QPT_GSI && dev->gsi_qp_created) { + pr_err("%s(%d) GSI special QPs already created.\n", + __func__, dev->id); + return -EINVAL; + } + /* verify consumer QPs are not trying to use GSI QP's CQ */ + if ((attrs->qp_type != IB_QPT_GSI) && (dev->gsi_qp_created)) { + if ((dev->gsi_sqcq == get_ocrdma_cq(attrs->send_cq)) || + (dev->gsi_rqcq == get_ocrdma_cq(attrs->recv_cq))) { + pr_err("%s(%d) Consumer QP cannot use GSI CQs.\n", + __func__, dev->id); + return -EINVAL; + } + } + return 0; +} + +static int ocrdma_copy_qp_uresp(struct ocrdma_qp *qp, + struct ib_udata *udata, int dpp_offset, + int dpp_credit_lmt, int srq) +{ + int status; + u64 usr_db; + struct ocrdma_create_qp_uresp uresp; + struct ocrdma_pd *pd = qp->pd; + struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device); + + memset(&uresp, 0, sizeof(uresp)); + usr_db = dev->nic_info.unmapped_db + + (pd->id * dev->nic_info.db_page_size); + uresp.qp_id = qp->id; + uresp.sq_dbid = qp->sq.dbid; + uresp.num_sq_pages = 1; + uresp.sq_page_size = PAGE_ALIGN(qp->sq.len); + uresp.sq_page_addr[0] = virt_to_phys(qp->sq.va); + uresp.num_wqe_allocated = qp->sq.max_cnt; + if (!srq) { + uresp.rq_dbid = qp->rq.dbid; + uresp.num_rq_pages = 1; + uresp.rq_page_size = PAGE_ALIGN(qp->rq.len); + uresp.rq_page_addr[0] = virt_to_phys(qp->rq.va); + uresp.num_rqe_allocated = qp->rq.max_cnt; + } + uresp.db_page_addr = usr_db; + uresp.db_page_size = dev->nic_info.db_page_size; + uresp.db_sq_offset = OCRDMA_DB_GEN2_SQ_OFFSET; + uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET; + uresp.db_shift = OCRDMA_DB_RQ_SHIFT; + + if (qp->dpp_enabled) { + uresp.dpp_credit = dpp_credit_lmt; + uresp.dpp_offset = dpp_offset; + } + status = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); + if (status) { + pr_err("%s(%d) user copy error.\n", __func__, dev->id); + goto err; + } + status = ocrdma_add_mmap(pd->uctx, uresp.sq_page_addr[0], + uresp.sq_page_size); + if (status) + goto err; + + if (!srq) { + status = ocrdma_add_mmap(pd->uctx, uresp.rq_page_addr[0], + uresp.rq_page_size); + if (status) + goto rq_map_err; + } + return status; +rq_map_err: + ocrdma_del_mmap(pd->uctx, uresp.sq_page_addr[0], uresp.sq_page_size); +err: + return status; +} + +static void ocrdma_set_qp_db(struct ocrdma_dev *dev, struct ocrdma_qp *qp, + struct ocrdma_pd *pd) +{ + if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) { + qp->sq_db = dev->nic_info.db + + (pd->id * dev->nic_info.db_page_size) + + OCRDMA_DB_GEN2_SQ_OFFSET; + qp->rq_db = dev->nic_info.db + + (pd->id * dev->nic_info.db_page_size) + + OCRDMA_DB_GEN2_RQ_OFFSET; + } else { + qp->sq_db = dev->nic_info.db + + (pd->id * dev->nic_info.db_page_size) + + OCRDMA_DB_SQ_OFFSET; + qp->rq_db = dev->nic_info.db + + (pd->id * dev->nic_info.db_page_size) + + OCRDMA_DB_RQ_OFFSET; + } +} + +static int ocrdma_alloc_wr_id_tbl(struct ocrdma_qp *qp) +{ + qp->wqe_wr_id_tbl = + kcalloc(qp->sq.max_cnt, sizeof(*(qp->wqe_wr_id_tbl)), + GFP_KERNEL); + if (qp->wqe_wr_id_tbl == NULL) + return -ENOMEM; + qp->rqe_wr_id_tbl = + kcalloc(qp->rq.max_cnt, sizeof(u64), GFP_KERNEL); + if (qp->rqe_wr_id_tbl == NULL) + return -ENOMEM; + + return 0; +} + +static void ocrdma_set_qp_init_params(struct ocrdma_qp *qp, + struct ocrdma_pd *pd, + struct ib_qp_init_attr *attrs) +{ + qp->pd = pd; + spin_lock_init(&qp->q_lock); + INIT_LIST_HEAD(&qp->sq_entry); + INIT_LIST_HEAD(&qp->rq_entry); + + qp->qp_type = attrs->qp_type; + qp->cap_flags = OCRDMA_QP_INB_RD | OCRDMA_QP_INB_WR; + qp->max_inline_data = attrs->cap.max_inline_data; + qp->sq.max_sges = attrs->cap.max_send_sge; + qp->rq.max_sges = attrs->cap.max_recv_sge; + qp->state = OCRDMA_QPS_RST; + qp->signaled = (attrs->sq_sig_type == IB_SIGNAL_ALL_WR) ? true : false; +} + +static void ocrdma_store_gsi_qp_cq(struct ocrdma_dev *dev, + struct ib_qp_init_attr *attrs) +{ + if (attrs->qp_type == IB_QPT_GSI) { + dev->gsi_qp_created = 1; + dev->gsi_sqcq = get_ocrdma_cq(attrs->send_cq); + dev->gsi_rqcq = get_ocrdma_cq(attrs->recv_cq); + } +} + +int ocrdma_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attrs, + struct ib_udata *udata) +{ + int status; + struct ib_pd *ibpd = ibqp->pd; + struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); + struct ocrdma_qp *qp = get_ocrdma_qp(ibqp); + struct ocrdma_dev *dev = get_ocrdma_dev(ibqp->device); + struct ocrdma_create_qp_ureq ureq; + u16 dpp_credit_lmt, dpp_offset; + + if (attrs->create_flags) + return -EOPNOTSUPP; + + status = ocrdma_check_qp_params(ibpd, dev, attrs, udata); + if (status) + goto gen_err; + + memset(&ureq, 0, sizeof(ureq)); + if (udata) { + if (ib_copy_from_udata(&ureq, udata, sizeof(ureq))) + return -EFAULT; + } + ocrdma_set_qp_init_params(qp, pd, attrs); + if (udata == NULL) + qp->cap_flags |= (OCRDMA_QP_MW_BIND | OCRDMA_QP_LKEY0 | + OCRDMA_QP_FAST_REG); + + mutex_lock(&dev->dev_lock); + status = ocrdma_mbx_create_qp(qp, attrs, ureq.enable_dpp_cq, + ureq.dpp_cq_id, + &dpp_offset, &dpp_credit_lmt); + if (status) + goto mbx_err; + + /* user space QP's wr_id table are managed in library */ + if (udata == NULL) { + status = ocrdma_alloc_wr_id_tbl(qp); + if (status) + goto map_err; + } + + status = ocrdma_add_qpn_map(dev, qp); + if (status) + goto map_err; + ocrdma_set_qp_db(dev, qp, pd); + if (udata) { + status = ocrdma_copy_qp_uresp(qp, udata, dpp_offset, + dpp_credit_lmt, + (attrs->srq != NULL)); + if (status) + goto cpy_err; + } + ocrdma_store_gsi_qp_cq(dev, attrs); + qp->ibqp.qp_num = qp->id; + mutex_unlock(&dev->dev_lock); + return 0; + +cpy_err: + ocrdma_del_qpn_map(dev, qp); +map_err: + ocrdma_mbx_destroy_qp(dev, qp); +mbx_err: + mutex_unlock(&dev->dev_lock); + kfree(qp->wqe_wr_id_tbl); + kfree(qp->rqe_wr_id_tbl); + pr_err("%s(%d) error=%d\n", __func__, dev->id, status); +gen_err: + return status; +} + +int _ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int attr_mask) +{ + int status = 0; + struct ocrdma_qp *qp; + struct ocrdma_dev *dev; + enum ib_qp_state old_qps; + + qp = get_ocrdma_qp(ibqp); + dev = get_ocrdma_dev(ibqp->device); + if (attr_mask & IB_QP_STATE) + status = ocrdma_qp_state_change(qp, attr->qp_state, &old_qps); + /* if new and previous states are same hw doesn't need to + * know about it. + */ + if (status < 0) + return status; + return ocrdma_mbx_modify_qp(dev, qp, attr, attr_mask); +} + +int ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int attr_mask, struct ib_udata *udata) +{ + unsigned long flags; + int status = -EINVAL; + struct ocrdma_qp *qp; + struct ocrdma_dev *dev; + enum ib_qp_state old_qps, new_qps; + + if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS) + return -EOPNOTSUPP; + + qp = get_ocrdma_qp(ibqp); + dev = get_ocrdma_dev(ibqp->device); + + /* syncronize with multiple context trying to change, retrive qps */ + mutex_lock(&dev->dev_lock); + /* syncronize with wqe, rqe posting and cqe processing contexts */ + spin_lock_irqsave(&qp->q_lock, flags); + old_qps = get_ibqp_state(qp->state); + if (attr_mask & IB_QP_STATE) + new_qps = attr->qp_state; + else + new_qps = old_qps; + spin_unlock_irqrestore(&qp->q_lock, flags); + + if (!ib_modify_qp_is_ok(old_qps, new_qps, ibqp->qp_type, attr_mask)) { + pr_err("%s(%d) invalid attribute mask=0x%x specified for\n" + "qpn=0x%x of type=0x%x old_qps=0x%x, new_qps=0x%x\n", + __func__, dev->id, attr_mask, qp->id, ibqp->qp_type, + old_qps, new_qps); + goto param_err; + } + + status = _ocrdma_modify_qp(ibqp, attr, attr_mask); + if (status > 0) + status = 0; +param_err: + mutex_unlock(&dev->dev_lock); + return status; +} + +static enum ib_mtu ocrdma_mtu_int_to_enum(u16 mtu) +{ + switch (mtu) { + case 256: + return IB_MTU_256; + case 512: + return IB_MTU_512; + case 1024: + return IB_MTU_1024; + case 2048: + return IB_MTU_2048; + case 4096: + return IB_MTU_4096; + default: + return IB_MTU_1024; + } +} + +static int ocrdma_to_ib_qp_acc_flags(int qp_cap_flags) +{ + int ib_qp_acc_flags = 0; + + if (qp_cap_flags & OCRDMA_QP_INB_WR) + ib_qp_acc_flags |= IB_ACCESS_REMOTE_WRITE; + if (qp_cap_flags & OCRDMA_QP_INB_RD) + ib_qp_acc_flags |= IB_ACCESS_LOCAL_WRITE; + return ib_qp_acc_flags; +} + +int ocrdma_query_qp(struct ib_qp *ibqp, + struct ib_qp_attr *qp_attr, + int attr_mask, struct ib_qp_init_attr *qp_init_attr) +{ + int status; + u32 qp_state; + struct ocrdma_qp_params params; + struct ocrdma_qp *qp = get_ocrdma_qp(ibqp); + struct ocrdma_dev *dev = get_ocrdma_dev(ibqp->device); + + memset(¶ms, 0, sizeof(params)); + mutex_lock(&dev->dev_lock); + status = ocrdma_mbx_query_qp(dev, qp, ¶ms); + mutex_unlock(&dev->dev_lock); + if (status) + goto mbx_err; + if (qp->qp_type == IB_QPT_UD) + qp_attr->qkey = params.qkey; + qp_attr->path_mtu = + ocrdma_mtu_int_to_enum(params.path_mtu_pkey_indx & + OCRDMA_QP_PARAMS_PATH_MTU_MASK) >> + OCRDMA_QP_PARAMS_PATH_MTU_SHIFT; + qp_attr->path_mig_state = IB_MIG_MIGRATED; + qp_attr->rq_psn = params.hop_lmt_rq_psn & OCRDMA_QP_PARAMS_RQ_PSN_MASK; + qp_attr->sq_psn = params.tclass_sq_psn & OCRDMA_QP_PARAMS_SQ_PSN_MASK; + qp_attr->dest_qp_num = + params.ack_to_rnr_rtc_dest_qpn & OCRDMA_QP_PARAMS_DEST_QPN_MASK; + + qp_attr->qp_access_flags = ocrdma_to_ib_qp_acc_flags(qp->cap_flags); + qp_attr->cap.max_send_wr = qp->sq.max_cnt - 1; + qp_attr->cap.max_recv_wr = qp->rq.max_cnt - 1; + qp_attr->cap.max_send_sge = qp->sq.max_sges; + qp_attr->cap.max_recv_sge = qp->rq.max_sges; + qp_attr->cap.max_inline_data = qp->max_inline_data; + qp_init_attr->cap = qp_attr->cap; + qp_attr->ah_attr.type = RDMA_AH_ATTR_TYPE_ROCE; + + rdma_ah_set_grh(&qp_attr->ah_attr, NULL, + params.rnt_rc_sl_fl & + OCRDMA_QP_PARAMS_FLOW_LABEL_MASK, + qp->sgid_idx, + (params.hop_lmt_rq_psn & + OCRDMA_QP_PARAMS_HOP_LMT_MASK) >> + OCRDMA_QP_PARAMS_HOP_LMT_SHIFT, + (params.tclass_sq_psn & + OCRDMA_QP_PARAMS_TCLASS_MASK) >> + OCRDMA_QP_PARAMS_TCLASS_SHIFT); + rdma_ah_set_dgid_raw(&qp_attr->ah_attr, ¶ms.dgid[0]); + + rdma_ah_set_port_num(&qp_attr->ah_attr, 1); + rdma_ah_set_sl(&qp_attr->ah_attr, (params.rnt_rc_sl_fl & + OCRDMA_QP_PARAMS_SL_MASK) >> + OCRDMA_QP_PARAMS_SL_SHIFT); + qp_attr->timeout = (params.ack_to_rnr_rtc_dest_qpn & + OCRDMA_QP_PARAMS_ACK_TIMEOUT_MASK) >> + OCRDMA_QP_PARAMS_ACK_TIMEOUT_SHIFT; + qp_attr->rnr_retry = (params.ack_to_rnr_rtc_dest_qpn & + OCRDMA_QP_PARAMS_RNR_RETRY_CNT_MASK) >> + OCRDMA_QP_PARAMS_RNR_RETRY_CNT_SHIFT; + qp_attr->retry_cnt = + (params.rnt_rc_sl_fl & OCRDMA_QP_PARAMS_RETRY_CNT_MASK) >> + OCRDMA_QP_PARAMS_RETRY_CNT_SHIFT; + qp_attr->min_rnr_timer = 0; + qp_attr->pkey_index = 0; + qp_attr->port_num = 1; + rdma_ah_set_path_bits(&qp_attr->ah_attr, 0); + rdma_ah_set_static_rate(&qp_attr->ah_attr, 0); + qp_attr->alt_pkey_index = 0; + qp_attr->alt_port_num = 0; + qp_attr->alt_timeout = 0; + memset(&qp_attr->alt_ah_attr, 0, sizeof(qp_attr->alt_ah_attr)); + qp_state = (params.max_sge_recv_flags & OCRDMA_QP_PARAMS_STATE_MASK) >> + OCRDMA_QP_PARAMS_STATE_SHIFT; + qp_attr->qp_state = get_ibqp_state(qp_state); + qp_attr->cur_qp_state = qp_attr->qp_state; + qp_attr->sq_draining = (qp_state == OCRDMA_QPS_SQ_DRAINING) ? 1 : 0; + qp_attr->max_dest_rd_atomic = + params.max_ord_ird >> OCRDMA_QP_PARAMS_MAX_ORD_SHIFT; + qp_attr->max_rd_atomic = + params.max_ord_ird & OCRDMA_QP_PARAMS_MAX_IRD_MASK; + qp_attr->en_sqd_async_notify = (params.max_sge_recv_flags & + OCRDMA_QP_PARAMS_FLAGS_SQD_ASYNC) ? 1 : 0; + /* Sync driver QP state with FW */ + ocrdma_qp_state_change(qp, qp_attr->qp_state, NULL); +mbx_err: + return status; +} + +static void ocrdma_srq_toggle_bit(struct ocrdma_srq *srq, unsigned int idx) +{ + unsigned int i = idx / 32; + u32 mask = (1U << (idx % 32)); + + srq->idx_bit_fields[i] ^= mask; +} + +static int ocrdma_hwq_free_cnt(struct ocrdma_qp_hwq_info *q) +{ + return ((q->max_wqe_idx - q->head) + q->tail) % q->max_cnt; +} + +static int is_hw_sq_empty(struct ocrdma_qp *qp) +{ + return (qp->sq.tail == qp->sq.head); +} + +static int is_hw_rq_empty(struct ocrdma_qp *qp) +{ + return (qp->rq.tail == qp->rq.head); +} + +static void *ocrdma_hwq_head(struct ocrdma_qp_hwq_info *q) +{ + return q->va + (q->head * q->entry_size); +} + +static void *ocrdma_hwq_head_from_idx(struct ocrdma_qp_hwq_info *q, + u32 idx) +{ + return q->va + (idx * q->entry_size); +} + +static void ocrdma_hwq_inc_head(struct ocrdma_qp_hwq_info *q) +{ + q->head = (q->head + 1) & q->max_wqe_idx; +} + +static void ocrdma_hwq_inc_tail(struct ocrdma_qp_hwq_info *q) +{ + q->tail = (q->tail + 1) & q->max_wqe_idx; +} + +/* discard the cqe for a given QP */ +static void ocrdma_discard_cqes(struct ocrdma_qp *qp, struct ocrdma_cq *cq) +{ + unsigned long cq_flags; + unsigned long flags; + int discard_cnt = 0; + u32 cur_getp, stop_getp; + struct ocrdma_cqe *cqe; + u32 qpn = 0, wqe_idx = 0; + + spin_lock_irqsave(&cq->cq_lock, cq_flags); + + /* traverse through the CQEs in the hw CQ, + * find the matching CQE for a given qp, + * mark the matching one discarded by clearing qpn. + * ring the doorbell in the poll_cq() as + * we don't complete out of order cqe. + */ + + cur_getp = cq->getp; + /* find upto when do we reap the cq. */ + stop_getp = cur_getp; + do { + if (is_hw_sq_empty(qp) && (!qp->srq && is_hw_rq_empty(qp))) + break; + + cqe = cq->va + cur_getp; + /* if (a) done reaping whole hw cq, or + * (b) qp_xq becomes empty. + * then exit + */ + qpn = cqe->cmn.qpn & OCRDMA_CQE_QPN_MASK; + /* if previously discarded cqe found, skip that too. */ + /* check for matching qp */ + if (qpn == 0 || qpn != qp->id) + goto skip_cqe; + + if (is_cqe_for_sq(cqe)) { + ocrdma_hwq_inc_tail(&qp->sq); + } else { + if (qp->srq) { + wqe_idx = (le32_to_cpu(cqe->rq.buftag_qpn) >> + OCRDMA_CQE_BUFTAG_SHIFT) & + qp->srq->rq.max_wqe_idx; + BUG_ON(wqe_idx < 1); + spin_lock_irqsave(&qp->srq->q_lock, flags); + ocrdma_hwq_inc_tail(&qp->srq->rq); + ocrdma_srq_toggle_bit(qp->srq, wqe_idx - 1); + spin_unlock_irqrestore(&qp->srq->q_lock, flags); + + } else { + ocrdma_hwq_inc_tail(&qp->rq); + } + } + /* mark cqe discarded so that it is not picked up later + * in the poll_cq(). + */ + discard_cnt += 1; + cqe->cmn.qpn = 0; +skip_cqe: + cur_getp = (cur_getp + 1) % cq->max_hw_cqe; + } while (cur_getp != stop_getp); + spin_unlock_irqrestore(&cq->cq_lock, cq_flags); +} + +void ocrdma_del_flush_qp(struct ocrdma_qp *qp) +{ + int found = false; + unsigned long flags; + struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device); + /* sync with any active CQ poll */ + + spin_lock_irqsave(&dev->flush_q_lock, flags); + found = ocrdma_is_qp_in_sq_flushlist(qp->sq_cq, qp); + if (found) + list_del(&qp->sq_entry); + if (!qp->srq) { + found = ocrdma_is_qp_in_rq_flushlist(qp->rq_cq, qp); + if (found) + list_del(&qp->rq_entry); + } + spin_unlock_irqrestore(&dev->flush_q_lock, flags); +} + +int ocrdma_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) +{ + struct ocrdma_pd *pd; + struct ocrdma_qp *qp; + struct ocrdma_dev *dev; + struct ib_qp_attr attrs; + int attr_mask; + unsigned long flags; + + qp = get_ocrdma_qp(ibqp); + dev = get_ocrdma_dev(ibqp->device); + + pd = qp->pd; + + /* change the QP state to ERROR */ + if (qp->state != OCRDMA_QPS_RST) { + attrs.qp_state = IB_QPS_ERR; + attr_mask = IB_QP_STATE; + _ocrdma_modify_qp(ibqp, &attrs, attr_mask); + } + /* ensure that CQEs for newly created QP (whose id may be same with + * one which just getting destroyed are same), dont get + * discarded until the old CQEs are discarded. + */ + mutex_lock(&dev->dev_lock); + (void) ocrdma_mbx_destroy_qp(dev, qp); + + /* + * acquire CQ lock while destroy is in progress, in order to + * protect against proessing in-flight CQEs for this QP. + */ + spin_lock_irqsave(&qp->sq_cq->cq_lock, flags); + if (qp->rq_cq && (qp->rq_cq != qp->sq_cq)) { + spin_lock(&qp->rq_cq->cq_lock); + ocrdma_del_qpn_map(dev, qp); + spin_unlock(&qp->rq_cq->cq_lock); + } else { + ocrdma_del_qpn_map(dev, qp); + } + spin_unlock_irqrestore(&qp->sq_cq->cq_lock, flags); + + if (!pd->uctx) { + ocrdma_discard_cqes(qp, qp->sq_cq); + ocrdma_discard_cqes(qp, qp->rq_cq); + } + mutex_unlock(&dev->dev_lock); + + if (pd->uctx) { + ocrdma_del_mmap(pd->uctx, (u64) qp->sq.pa, + PAGE_ALIGN(qp->sq.len)); + if (!qp->srq) + ocrdma_del_mmap(pd->uctx, (u64) qp->rq.pa, + PAGE_ALIGN(qp->rq.len)); + } + + ocrdma_del_flush_qp(qp); + + kfree(qp->wqe_wr_id_tbl); + kfree(qp->rqe_wr_id_tbl); + return 0; +} + +static int ocrdma_copy_srq_uresp(struct ocrdma_dev *dev, struct ocrdma_srq *srq, + struct ib_udata *udata) +{ + int status; + struct ocrdma_create_srq_uresp uresp; + + memset(&uresp, 0, sizeof(uresp)); + uresp.rq_dbid = srq->rq.dbid; + uresp.num_rq_pages = 1; + uresp.rq_page_addr[0] = virt_to_phys(srq->rq.va); + uresp.rq_page_size = srq->rq.len; + uresp.db_page_addr = dev->nic_info.unmapped_db + + (srq->pd->id * dev->nic_info.db_page_size); + uresp.db_page_size = dev->nic_info.db_page_size; + uresp.num_rqe_allocated = srq->rq.max_cnt; + if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) { + uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET; + uresp.db_shift = 24; + } else { + uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET; + uresp.db_shift = 16; + } + + status = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); + if (status) + return status; + status = ocrdma_add_mmap(srq->pd->uctx, uresp.rq_page_addr[0], + uresp.rq_page_size); + if (status) + return status; + return status; +} + +int ocrdma_create_srq(struct ib_srq *ibsrq, struct ib_srq_init_attr *init_attr, + struct ib_udata *udata) +{ + int status; + struct ocrdma_pd *pd = get_ocrdma_pd(ibsrq->pd); + struct ocrdma_dev *dev = get_ocrdma_dev(ibsrq->device); + struct ocrdma_srq *srq = get_ocrdma_srq(ibsrq); + + if (init_attr->srq_type != IB_SRQT_BASIC) + return -EOPNOTSUPP; + + if (init_attr->attr.max_sge > dev->attr.max_recv_sge) + return -EINVAL; + if (init_attr->attr.max_wr > dev->attr.max_rqe) + return -EINVAL; + + spin_lock_init(&srq->q_lock); + srq->pd = pd; + srq->db = dev->nic_info.db + (pd->id * dev->nic_info.db_page_size); + status = ocrdma_mbx_create_srq(dev, srq, init_attr, pd); + if (status) + return status; + + if (!udata) { + srq->rqe_wr_id_tbl = kcalloc(srq->rq.max_cnt, sizeof(u64), + GFP_KERNEL); + if (!srq->rqe_wr_id_tbl) { + status = -ENOMEM; + goto arm_err; + } + + srq->bit_fields_len = (srq->rq.max_cnt / 32) + + (srq->rq.max_cnt % 32 ? 1 : 0); + srq->idx_bit_fields = + kmalloc_array(srq->bit_fields_len, sizeof(u32), + GFP_KERNEL); + if (!srq->idx_bit_fields) { + status = -ENOMEM; + goto arm_err; + } + memset(srq->idx_bit_fields, 0xff, + srq->bit_fields_len * sizeof(u32)); + } + + if (init_attr->attr.srq_limit) { + status = ocrdma_mbx_modify_srq(srq, &init_attr->attr); + if (status) + goto arm_err; + } + + if (udata) { + status = ocrdma_copy_srq_uresp(dev, srq, udata); + if (status) + goto arm_err; + } + + return 0; + +arm_err: + ocrdma_mbx_destroy_srq(dev, srq); + kfree(srq->rqe_wr_id_tbl); + kfree(srq->idx_bit_fields); + return status; +} + +int ocrdma_modify_srq(struct ib_srq *ibsrq, + struct ib_srq_attr *srq_attr, + enum ib_srq_attr_mask srq_attr_mask, + struct ib_udata *udata) +{ + int status; + struct ocrdma_srq *srq; + + srq = get_ocrdma_srq(ibsrq); + if (srq_attr_mask & IB_SRQ_MAX_WR) + status = -EINVAL; + else + status = ocrdma_mbx_modify_srq(srq, srq_attr); + return status; +} + +int ocrdma_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr) +{ + struct ocrdma_srq *srq; + + srq = get_ocrdma_srq(ibsrq); + return ocrdma_mbx_query_srq(srq, srq_attr); +} + +int ocrdma_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata) +{ + struct ocrdma_srq *srq; + struct ocrdma_dev *dev = get_ocrdma_dev(ibsrq->device); + + srq = get_ocrdma_srq(ibsrq); + + ocrdma_mbx_destroy_srq(dev, srq); + + if (srq->pd->uctx) + ocrdma_del_mmap(srq->pd->uctx, (u64) srq->rq.pa, + PAGE_ALIGN(srq->rq.len)); + + kfree(srq->idx_bit_fields); + kfree(srq->rqe_wr_id_tbl); + return 0; +} + +/* unprivileged verbs and their support functions. */ +static void ocrdma_build_ud_hdr(struct ocrdma_qp *qp, + struct ocrdma_hdr_wqe *hdr, + const struct ib_send_wr *wr) +{ + struct ocrdma_ewqe_ud_hdr *ud_hdr = + (struct ocrdma_ewqe_ud_hdr *)(hdr + 1); + struct ocrdma_ah *ah = get_ocrdma_ah(ud_wr(wr)->ah); + + ud_hdr->rsvd_dest_qpn = ud_wr(wr)->remote_qpn; + if (qp->qp_type == IB_QPT_GSI) + ud_hdr->qkey = qp->qkey; + else + ud_hdr->qkey = ud_wr(wr)->remote_qkey; + ud_hdr->rsvd_ahid = ah->id; + ud_hdr->hdr_type = ah->hdr_type; + if (ah->av->valid & OCRDMA_AV_VLAN_VALID) + hdr->cw |= (OCRDMA_FLAG_AH_VLAN_PR << OCRDMA_WQE_FLAGS_SHIFT); +} + +static void ocrdma_build_sges(struct ocrdma_hdr_wqe *hdr, + struct ocrdma_sge *sge, int num_sge, + struct ib_sge *sg_list) +{ + int i; + + for (i = 0; i < num_sge; i++) { + sge[i].lrkey = sg_list[i].lkey; + sge[i].addr_lo = sg_list[i].addr; + sge[i].addr_hi = upper_32_bits(sg_list[i].addr); + sge[i].len = sg_list[i].length; + hdr->total_len += sg_list[i].length; + } + if (num_sge == 0) + memset(sge, 0, sizeof(*sge)); +} + +static inline uint32_t ocrdma_sglist_len(struct ib_sge *sg_list, int num_sge) +{ + uint32_t total_len = 0, i; + + for (i = 0; i < num_sge; i++) + total_len += sg_list[i].length; + return total_len; +} + + +static int ocrdma_build_inline_sges(struct ocrdma_qp *qp, + struct ocrdma_hdr_wqe *hdr, + struct ocrdma_sge *sge, + const struct ib_send_wr *wr, u32 wqe_size) +{ + int i; + char *dpp_addr; + + if (wr->send_flags & IB_SEND_INLINE && qp->qp_type != IB_QPT_UD) { + hdr->total_len = ocrdma_sglist_len(wr->sg_list, wr->num_sge); + if (unlikely(hdr->total_len > qp->max_inline_data)) { + pr_err("%s() supported_len=0x%x,\n" + " unsupported len req=0x%x\n", __func__, + qp->max_inline_data, hdr->total_len); + return -EINVAL; + } + dpp_addr = (char *)sge; + for (i = 0; i < wr->num_sge; i++) { + memcpy(dpp_addr, + (void *)(unsigned long)wr->sg_list[i].addr, + wr->sg_list[i].length); + dpp_addr += wr->sg_list[i].length; + } + + wqe_size += roundup(hdr->total_len, OCRDMA_WQE_ALIGN_BYTES); + if (0 == hdr->total_len) + wqe_size += sizeof(struct ocrdma_sge); + hdr->cw |= (OCRDMA_TYPE_INLINE << OCRDMA_WQE_TYPE_SHIFT); + } else { + ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list); + if (wr->num_sge) + wqe_size += (wr->num_sge * sizeof(struct ocrdma_sge)); + else + wqe_size += sizeof(struct ocrdma_sge); + hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT); + } + hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT); + return 0; +} + +static int ocrdma_build_send(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr, + const struct ib_send_wr *wr) +{ + struct ocrdma_sge *sge; + u32 wqe_size = sizeof(*hdr); + + if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) { + ocrdma_build_ud_hdr(qp, hdr, wr); + sge = (struct ocrdma_sge *)(hdr + 2); + wqe_size += sizeof(struct ocrdma_ewqe_ud_hdr); + } else { + sge = (struct ocrdma_sge *)(hdr + 1); + } + + return ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size); +} + +static int ocrdma_build_write(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr, + const struct ib_send_wr *wr) +{ + int status; + struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1); + struct ocrdma_sge *sge = ext_rw + 1; + u32 wqe_size = sizeof(*hdr) + sizeof(*ext_rw); + + status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size); + if (status) + return status; + ext_rw->addr_lo = rdma_wr(wr)->remote_addr; + ext_rw->addr_hi = upper_32_bits(rdma_wr(wr)->remote_addr); + ext_rw->lrkey = rdma_wr(wr)->rkey; + ext_rw->len = hdr->total_len; + return 0; +} + +static void ocrdma_build_read(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr, + const struct ib_send_wr *wr) +{ + struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1); + struct ocrdma_sge *sge = ext_rw + 1; + u32 wqe_size = ((wr->num_sge + 1) * sizeof(struct ocrdma_sge)) + + sizeof(struct ocrdma_hdr_wqe); + + ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list); + hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT); + hdr->cw |= (OCRDMA_READ << OCRDMA_WQE_OPCODE_SHIFT); + hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT); + + ext_rw->addr_lo = rdma_wr(wr)->remote_addr; + ext_rw->addr_hi = upper_32_bits(rdma_wr(wr)->remote_addr); + ext_rw->lrkey = rdma_wr(wr)->rkey; + ext_rw->len = hdr->total_len; +} + +static int get_encoded_page_size(int pg_sz) +{ + /* Max size is 256M 4096 << 16 */ + int i = 0; + for (; i < 17; i++) + if (pg_sz == (4096 << i)) + break; + return i; +} + +static int ocrdma_build_reg(struct ocrdma_qp *qp, + struct ocrdma_hdr_wqe *hdr, + const struct ib_reg_wr *wr) +{ + u64 fbo; + struct ocrdma_ewqe_fr *fast_reg = (struct ocrdma_ewqe_fr *)(hdr + 1); + struct ocrdma_mr *mr = get_ocrdma_mr(wr->mr); + struct ocrdma_pbl *pbl_tbl = mr->hwmr.pbl_table; + struct ocrdma_pbe *pbe; + u32 wqe_size = sizeof(*fast_reg) + sizeof(*hdr); + int num_pbes = 0, i; + + wqe_size = roundup(wqe_size, OCRDMA_WQE_ALIGN_BYTES); + + hdr->cw |= (OCRDMA_FR_MR << OCRDMA_WQE_OPCODE_SHIFT); + hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT); + + if (wr->access & IB_ACCESS_LOCAL_WRITE) + hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_LOCAL_WR; + if (wr->access & IB_ACCESS_REMOTE_WRITE) + hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_WR; + if (wr->access & IB_ACCESS_REMOTE_READ) + hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_RD; + hdr->lkey = wr->key; + hdr->total_len = mr->ibmr.length; + + fbo = mr->ibmr.iova - mr->pages[0]; + + fast_reg->va_hi = upper_32_bits(mr->ibmr.iova); + fast_reg->va_lo = (u32) (mr->ibmr.iova & 0xffffffff); + fast_reg->fbo_hi = upper_32_bits(fbo); + fast_reg->fbo_lo = (u32) fbo & 0xffffffff; + fast_reg->num_sges = mr->npages; + fast_reg->size_sge = get_encoded_page_size(mr->ibmr.page_size); + + pbe = pbl_tbl->va; + for (i = 0; i < mr->npages; i++) { + u64 buf_addr = mr->pages[i]; + + pbe->pa_lo = cpu_to_le32((u32) (buf_addr & PAGE_MASK)); + pbe->pa_hi = cpu_to_le32((u32) upper_32_bits(buf_addr)); + num_pbes += 1; + pbe++; + + /* if the pbl is full storing the pbes, + * move to next pbl. + */ + if (num_pbes == (mr->hwmr.pbl_size/sizeof(u64))) { + pbl_tbl++; + pbe = (struct ocrdma_pbe *)pbl_tbl->va; + } + } + + return 0; +} + +static void ocrdma_ring_sq_db(struct ocrdma_qp *qp) +{ + u32 val = qp->sq.dbid | (1 << OCRDMA_DB_SQ_SHIFT); + + iowrite32(val, qp->sq_db); +} + +int ocrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) +{ + int status = 0; + struct ocrdma_qp *qp = get_ocrdma_qp(ibqp); + struct ocrdma_hdr_wqe *hdr; + unsigned long flags; + + spin_lock_irqsave(&qp->q_lock, flags); + if (qp->state != OCRDMA_QPS_RTS && qp->state != OCRDMA_QPS_SQD) { + spin_unlock_irqrestore(&qp->q_lock, flags); + *bad_wr = wr; + return -EINVAL; + } + + while (wr) { + if (qp->qp_type == IB_QPT_UD && + (wr->opcode != IB_WR_SEND && + wr->opcode != IB_WR_SEND_WITH_IMM)) { + *bad_wr = wr; + status = -EINVAL; + break; + } + if (ocrdma_hwq_free_cnt(&qp->sq) == 0 || + wr->num_sge > qp->sq.max_sges) { + *bad_wr = wr; + status = -ENOMEM; + break; + } + hdr = ocrdma_hwq_head(&qp->sq); + hdr->cw = 0; + if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled) + hdr->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT); + if (wr->send_flags & IB_SEND_FENCE) + hdr->cw |= + (OCRDMA_FLAG_FENCE_L << OCRDMA_WQE_FLAGS_SHIFT); + if (wr->send_flags & IB_SEND_SOLICITED) + hdr->cw |= + (OCRDMA_FLAG_SOLICIT << OCRDMA_WQE_FLAGS_SHIFT); + hdr->total_len = 0; + switch (wr->opcode) { + case IB_WR_SEND_WITH_IMM: + hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT); + hdr->immdt = ntohl(wr->ex.imm_data); + fallthrough; + case IB_WR_SEND: + hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT); + ocrdma_build_send(qp, hdr, wr); + break; + case IB_WR_SEND_WITH_INV: + hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT); + hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT); + hdr->lkey = wr->ex.invalidate_rkey; + status = ocrdma_build_send(qp, hdr, wr); + break; + case IB_WR_RDMA_WRITE_WITH_IMM: + hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT); + hdr->immdt = ntohl(wr->ex.imm_data); + fallthrough; + case IB_WR_RDMA_WRITE: + hdr->cw |= (OCRDMA_WRITE << OCRDMA_WQE_OPCODE_SHIFT); + status = ocrdma_build_write(qp, hdr, wr); + break; + case IB_WR_RDMA_READ: + ocrdma_build_read(qp, hdr, wr); + break; + case IB_WR_LOCAL_INV: + hdr->cw |= + (OCRDMA_LKEY_INV << OCRDMA_WQE_OPCODE_SHIFT); + hdr->cw |= ((sizeof(struct ocrdma_hdr_wqe) + + sizeof(struct ocrdma_sge)) / + OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT; + hdr->lkey = wr->ex.invalidate_rkey; + break; + case IB_WR_REG_MR: + status = ocrdma_build_reg(qp, hdr, reg_wr(wr)); + break; + default: + status = -EINVAL; + break; + } + if (status) { + *bad_wr = wr; + break; + } + if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled) + qp->wqe_wr_id_tbl[qp->sq.head].signaled = 1; + else + qp->wqe_wr_id_tbl[qp->sq.head].signaled = 0; + qp->wqe_wr_id_tbl[qp->sq.head].wrid = wr->wr_id; + ocrdma_cpu_to_le32(hdr, ((hdr->cw >> OCRDMA_WQE_SIZE_SHIFT) & + OCRDMA_WQE_SIZE_MASK) * OCRDMA_WQE_STRIDE); + /* make sure wqe is written before adapter can access it */ + wmb(); + /* inform hw to start processing it */ + ocrdma_ring_sq_db(qp); + + /* update pointer, counter for next wr */ + ocrdma_hwq_inc_head(&qp->sq); + wr = wr->next; + } + spin_unlock_irqrestore(&qp->q_lock, flags); + return status; +} + +static void ocrdma_ring_rq_db(struct ocrdma_qp *qp) +{ + u32 val = qp->rq.dbid | (1 << OCRDMA_DB_RQ_SHIFT); + + iowrite32(val, qp->rq_db); +} + +static void ocrdma_build_rqe(struct ocrdma_hdr_wqe *rqe, + const struct ib_recv_wr *wr, u16 tag) +{ + u32 wqe_size = 0; + struct ocrdma_sge *sge; + if (wr->num_sge) + wqe_size = (wr->num_sge * sizeof(*sge)) + sizeof(*rqe); + else + wqe_size = sizeof(*sge) + sizeof(*rqe); + + rqe->cw = ((wqe_size / OCRDMA_WQE_STRIDE) << + OCRDMA_WQE_SIZE_SHIFT); + rqe->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT); + rqe->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT); + rqe->total_len = 0; + rqe->rsvd_tag = tag; + sge = (struct ocrdma_sge *)(rqe + 1); + ocrdma_build_sges(rqe, sge, wr->num_sge, wr->sg_list); + ocrdma_cpu_to_le32(rqe, wqe_size); +} + +int ocrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + int status = 0; + unsigned long flags; + struct ocrdma_qp *qp = get_ocrdma_qp(ibqp); + struct ocrdma_hdr_wqe *rqe; + + spin_lock_irqsave(&qp->q_lock, flags); + if (qp->state == OCRDMA_QPS_RST || qp->state == OCRDMA_QPS_ERR) { + spin_unlock_irqrestore(&qp->q_lock, flags); + *bad_wr = wr; + return -EINVAL; + } + while (wr) { + if (ocrdma_hwq_free_cnt(&qp->rq) == 0 || + wr->num_sge > qp->rq.max_sges) { + *bad_wr = wr; + status = -ENOMEM; + break; + } + rqe = ocrdma_hwq_head(&qp->rq); + ocrdma_build_rqe(rqe, wr, 0); + + qp->rqe_wr_id_tbl[qp->rq.head] = wr->wr_id; + /* make sure rqe is written before adapter can access it */ + wmb(); + + /* inform hw to start processing it */ + ocrdma_ring_rq_db(qp); + + /* update pointer, counter for next wr */ + ocrdma_hwq_inc_head(&qp->rq); + wr = wr->next; + } + spin_unlock_irqrestore(&qp->q_lock, flags); + return status; +} + +/* cqe for srq's rqe can potentially arrive out of order. + * index gives the entry in the shadow table where to store + * the wr_id. tag/index is returned in cqe to reference back + * for a given rqe. + */ +static int ocrdma_srq_get_idx(struct ocrdma_srq *srq) +{ + int row = 0; + int indx = 0; + + for (row = 0; row < srq->bit_fields_len; row++) { + if (srq->idx_bit_fields[row]) { + indx = ffs(srq->idx_bit_fields[row]); + indx = (row * 32) + (indx - 1); + BUG_ON(indx >= srq->rq.max_cnt); + ocrdma_srq_toggle_bit(srq, indx); + break; + } + } + + BUG_ON(row == srq->bit_fields_len); + return indx + 1; /* Use from index 1 */ +} + +static void ocrdma_ring_srq_db(struct ocrdma_srq *srq) +{ + u32 val = srq->rq.dbid | (1 << 16); + + iowrite32(val, srq->db + OCRDMA_DB_GEN2_SRQ_OFFSET); +} + +int ocrdma_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + int status = 0; + unsigned long flags; + struct ocrdma_srq *srq; + struct ocrdma_hdr_wqe *rqe; + u16 tag; + + srq = get_ocrdma_srq(ibsrq); + + spin_lock_irqsave(&srq->q_lock, flags); + while (wr) { + if (ocrdma_hwq_free_cnt(&srq->rq) == 0 || + wr->num_sge > srq->rq.max_sges) { + status = -ENOMEM; + *bad_wr = wr; + break; + } + tag = ocrdma_srq_get_idx(srq); + rqe = ocrdma_hwq_head(&srq->rq); + ocrdma_build_rqe(rqe, wr, tag); + + srq->rqe_wr_id_tbl[tag] = wr->wr_id; + /* make sure rqe is written before adapter can perform DMA */ + wmb(); + /* inform hw to start processing it */ + ocrdma_ring_srq_db(srq); + /* update pointer, counter for next wr */ + ocrdma_hwq_inc_head(&srq->rq); + wr = wr->next; + } + spin_unlock_irqrestore(&srq->q_lock, flags); + return status; +} + +static enum ib_wc_status ocrdma_to_ibwc_err(u16 status) +{ + enum ib_wc_status ibwc_status; + + switch (status) { + case OCRDMA_CQE_GENERAL_ERR: + ibwc_status = IB_WC_GENERAL_ERR; + break; + case OCRDMA_CQE_LOC_LEN_ERR: + ibwc_status = IB_WC_LOC_LEN_ERR; + break; + case OCRDMA_CQE_LOC_QP_OP_ERR: + ibwc_status = IB_WC_LOC_QP_OP_ERR; + break; + case OCRDMA_CQE_LOC_EEC_OP_ERR: + ibwc_status = IB_WC_LOC_EEC_OP_ERR; + break; + case OCRDMA_CQE_LOC_PROT_ERR: + ibwc_status = IB_WC_LOC_PROT_ERR; + break; + case OCRDMA_CQE_WR_FLUSH_ERR: + ibwc_status = IB_WC_WR_FLUSH_ERR; + break; + case OCRDMA_CQE_MW_BIND_ERR: + ibwc_status = IB_WC_MW_BIND_ERR; + break; + case OCRDMA_CQE_BAD_RESP_ERR: + ibwc_status = IB_WC_BAD_RESP_ERR; + break; + case OCRDMA_CQE_LOC_ACCESS_ERR: + ibwc_status = IB_WC_LOC_ACCESS_ERR; + break; + case OCRDMA_CQE_REM_INV_REQ_ERR: + ibwc_status = IB_WC_REM_INV_REQ_ERR; + break; + case OCRDMA_CQE_REM_ACCESS_ERR: + ibwc_status = IB_WC_REM_ACCESS_ERR; + break; + case OCRDMA_CQE_REM_OP_ERR: + ibwc_status = IB_WC_REM_OP_ERR; + break; + case OCRDMA_CQE_RETRY_EXC_ERR: + ibwc_status = IB_WC_RETRY_EXC_ERR; + break; + case OCRDMA_CQE_RNR_RETRY_EXC_ERR: + ibwc_status = IB_WC_RNR_RETRY_EXC_ERR; + break; + case OCRDMA_CQE_LOC_RDD_VIOL_ERR: + ibwc_status = IB_WC_LOC_RDD_VIOL_ERR; + break; + case OCRDMA_CQE_REM_INV_RD_REQ_ERR: + ibwc_status = IB_WC_REM_INV_RD_REQ_ERR; + break; + case OCRDMA_CQE_REM_ABORT_ERR: + ibwc_status = IB_WC_REM_ABORT_ERR; + break; + case OCRDMA_CQE_INV_EECN_ERR: + ibwc_status = IB_WC_INV_EECN_ERR; + break; + case OCRDMA_CQE_INV_EEC_STATE_ERR: + ibwc_status = IB_WC_INV_EEC_STATE_ERR; + break; + case OCRDMA_CQE_FATAL_ERR: + ibwc_status = IB_WC_FATAL_ERR; + break; + case OCRDMA_CQE_RESP_TIMEOUT_ERR: + ibwc_status = IB_WC_RESP_TIMEOUT_ERR; + break; + default: + ibwc_status = IB_WC_GENERAL_ERR; + break; + } + return ibwc_status; +} + +static void ocrdma_update_wc(struct ocrdma_qp *qp, struct ib_wc *ibwc, + u32 wqe_idx) +{ + struct ocrdma_hdr_wqe *hdr; + struct ocrdma_sge *rw; + int opcode; + + hdr = ocrdma_hwq_head_from_idx(&qp->sq, wqe_idx); + + ibwc->wr_id = qp->wqe_wr_id_tbl[wqe_idx].wrid; + /* Undo the hdr->cw swap */ + opcode = le32_to_cpu(hdr->cw) & OCRDMA_WQE_OPCODE_MASK; + switch (opcode) { + case OCRDMA_WRITE: + ibwc->opcode = IB_WC_RDMA_WRITE; + break; + case OCRDMA_READ: + rw = (struct ocrdma_sge *)(hdr + 1); + ibwc->opcode = IB_WC_RDMA_READ; + ibwc->byte_len = rw->len; + break; + case OCRDMA_SEND: + ibwc->opcode = IB_WC_SEND; + break; + case OCRDMA_FR_MR: + ibwc->opcode = IB_WC_REG_MR; + break; + case OCRDMA_LKEY_INV: + ibwc->opcode = IB_WC_LOCAL_INV; + break; + default: + ibwc->status = IB_WC_GENERAL_ERR; + pr_err("%s() invalid opcode received = 0x%x\n", + __func__, hdr->cw & OCRDMA_WQE_OPCODE_MASK); + break; + } +} + +static void ocrdma_set_cqe_status_flushed(struct ocrdma_qp *qp, + struct ocrdma_cqe *cqe) +{ + if (is_cqe_for_sq(cqe)) { + cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu( + cqe->flags_status_srcqpn) & + ~OCRDMA_CQE_STATUS_MASK); + cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu( + cqe->flags_status_srcqpn) | + (OCRDMA_CQE_WR_FLUSH_ERR << + OCRDMA_CQE_STATUS_SHIFT)); + } else { + if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) { + cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu( + cqe->flags_status_srcqpn) & + ~OCRDMA_CQE_UD_STATUS_MASK); + cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu( + cqe->flags_status_srcqpn) | + (OCRDMA_CQE_WR_FLUSH_ERR << + OCRDMA_CQE_UD_STATUS_SHIFT)); + } else { + cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu( + cqe->flags_status_srcqpn) & + ~OCRDMA_CQE_STATUS_MASK); + cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu( + cqe->flags_status_srcqpn) | + (OCRDMA_CQE_WR_FLUSH_ERR << + OCRDMA_CQE_STATUS_SHIFT)); + } + } +} + +static bool ocrdma_update_err_cqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe, + struct ocrdma_qp *qp, int status) +{ + bool expand = false; + + ibwc->byte_len = 0; + ibwc->qp = &qp->ibqp; + ibwc->status = ocrdma_to_ibwc_err(status); + + ocrdma_flush_qp(qp); + ocrdma_qp_state_change(qp, IB_QPS_ERR, NULL); + + /* if wqe/rqe pending for which cqe needs to be returned, + * trigger inflating it. + */ + if (!is_hw_rq_empty(qp) || !is_hw_sq_empty(qp)) { + expand = true; + ocrdma_set_cqe_status_flushed(qp, cqe); + } + return expand; +} + +static int ocrdma_update_err_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe, + struct ocrdma_qp *qp, int status) +{ + ibwc->opcode = IB_WC_RECV; + ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail]; + ocrdma_hwq_inc_tail(&qp->rq); + + return ocrdma_update_err_cqe(ibwc, cqe, qp, status); +} + +static int ocrdma_update_err_scqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe, + struct ocrdma_qp *qp, int status) +{ + ocrdma_update_wc(qp, ibwc, qp->sq.tail); + ocrdma_hwq_inc_tail(&qp->sq); + + return ocrdma_update_err_cqe(ibwc, cqe, qp, status); +} + + +static bool ocrdma_poll_err_scqe(struct ocrdma_qp *qp, + struct ocrdma_cqe *cqe, struct ib_wc *ibwc, + bool *polled, bool *stop) +{ + bool expand; + struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device); + int status = (le32_to_cpu(cqe->flags_status_srcqpn) & + OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT; + if (status < OCRDMA_MAX_CQE_ERR) + atomic_inc(&dev->cqe_err_stats[status]); + + /* when hw sq is empty, but rq is not empty, so we continue + * to keep the cqe in order to get the cq event again. + */ + if (is_hw_sq_empty(qp) && !is_hw_rq_empty(qp)) { + /* when cq for rq and sq is same, it is safe to return + * flush cqe for RQEs. + */ + if (!qp->srq && (qp->sq_cq == qp->rq_cq)) { + *polled = true; + status = OCRDMA_CQE_WR_FLUSH_ERR; + expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status); + } else { + /* stop processing further cqe as this cqe is used for + * triggering cq event on buddy cq of RQ. + * When QP is destroyed, this cqe will be removed + * from the cq's hardware q. + */ + *polled = false; + *stop = true; + expand = false; + } + } else if (is_hw_sq_empty(qp)) { + /* Do nothing */ + expand = false; + *polled = false; + *stop = false; + } else { + *polled = true; + expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status); + } + return expand; +} + +static bool ocrdma_poll_success_scqe(struct ocrdma_qp *qp, + struct ocrdma_cqe *cqe, + struct ib_wc *ibwc, bool *polled) +{ + bool expand = false; + int tail = qp->sq.tail; + u32 wqe_idx; + + if (!qp->wqe_wr_id_tbl[tail].signaled) { + *polled = false; /* WC cannot be consumed yet */ + } else { + ibwc->status = IB_WC_SUCCESS; + ibwc->wc_flags = 0; + ibwc->qp = &qp->ibqp; + ocrdma_update_wc(qp, ibwc, tail); + *polled = true; + } + wqe_idx = (le32_to_cpu(cqe->wq.wqeidx) & + OCRDMA_CQE_WQEIDX_MASK) & qp->sq.max_wqe_idx; + if (tail != wqe_idx) + expand = true; /* Coalesced CQE can't be consumed yet */ + + ocrdma_hwq_inc_tail(&qp->sq); + return expand; +} + +static bool ocrdma_poll_scqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe, + struct ib_wc *ibwc, bool *polled, bool *stop) +{ + int status; + bool expand; + + status = (le32_to_cpu(cqe->flags_status_srcqpn) & + OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT; + + if (status == OCRDMA_CQE_SUCCESS) + expand = ocrdma_poll_success_scqe(qp, cqe, ibwc, polled); + else + expand = ocrdma_poll_err_scqe(qp, cqe, ibwc, polled, stop); + return expand; +} + +static int ocrdma_update_ud_rcqe(struct ocrdma_dev *dev, struct ib_wc *ibwc, + struct ocrdma_cqe *cqe) +{ + int status; + u16 hdr_type = 0; + + status = (le32_to_cpu(cqe->flags_status_srcqpn) & + OCRDMA_CQE_UD_STATUS_MASK) >> OCRDMA_CQE_UD_STATUS_SHIFT; + ibwc->src_qp = le32_to_cpu(cqe->flags_status_srcqpn) & + OCRDMA_CQE_SRCQP_MASK; + ibwc->pkey_index = 0; + ibwc->wc_flags = IB_WC_GRH; + ibwc->byte_len = (le32_to_cpu(cqe->ud.rxlen_pkey) >> + OCRDMA_CQE_UD_XFER_LEN_SHIFT) & + OCRDMA_CQE_UD_XFER_LEN_MASK; + + if (ocrdma_is_udp_encap_supported(dev)) { + hdr_type = (le32_to_cpu(cqe->ud.rxlen_pkey) >> + OCRDMA_CQE_UD_L3TYPE_SHIFT) & + OCRDMA_CQE_UD_L3TYPE_MASK; + ibwc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE; + ibwc->network_hdr_type = hdr_type; + } + + return status; +} + +static void ocrdma_update_free_srq_cqe(struct ib_wc *ibwc, + struct ocrdma_cqe *cqe, + struct ocrdma_qp *qp) +{ + unsigned long flags; + struct ocrdma_srq *srq; + u32 wqe_idx; + + srq = get_ocrdma_srq(qp->ibqp.srq); + wqe_idx = (le32_to_cpu(cqe->rq.buftag_qpn) >> + OCRDMA_CQE_BUFTAG_SHIFT) & srq->rq.max_wqe_idx; + BUG_ON(wqe_idx < 1); + + ibwc->wr_id = srq->rqe_wr_id_tbl[wqe_idx]; + spin_lock_irqsave(&srq->q_lock, flags); + ocrdma_srq_toggle_bit(srq, wqe_idx - 1); + spin_unlock_irqrestore(&srq->q_lock, flags); + ocrdma_hwq_inc_tail(&srq->rq); +} + +static bool ocrdma_poll_err_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe, + struct ib_wc *ibwc, bool *polled, bool *stop, + int status) +{ + bool expand; + struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device); + + if (status < OCRDMA_MAX_CQE_ERR) + atomic_inc(&dev->cqe_err_stats[status]); + + /* when hw_rq is empty, but wq is not empty, so continue + * to keep the cqe to get the cq event again. + */ + if (is_hw_rq_empty(qp) && !is_hw_sq_empty(qp)) { + if (!qp->srq && (qp->sq_cq == qp->rq_cq)) { + *polled = true; + status = OCRDMA_CQE_WR_FLUSH_ERR; + expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status); + } else { + *polled = false; + *stop = true; + expand = false; + } + } else if (is_hw_rq_empty(qp)) { + /* Do nothing */ + expand = false; + *polled = false; + *stop = false; + } else { + *polled = true; + expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status); + } + return expand; +} + +static void ocrdma_poll_success_rcqe(struct ocrdma_qp *qp, + struct ocrdma_cqe *cqe, struct ib_wc *ibwc) +{ + struct ocrdma_dev *dev; + + dev = get_ocrdma_dev(qp->ibqp.device); + ibwc->opcode = IB_WC_RECV; + ibwc->qp = &qp->ibqp; + ibwc->status = IB_WC_SUCCESS; + + if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) + ocrdma_update_ud_rcqe(dev, ibwc, cqe); + else + ibwc->byte_len = le32_to_cpu(cqe->rq.rxlen); + + if (is_cqe_imm(cqe)) { + ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt)); + ibwc->wc_flags |= IB_WC_WITH_IMM; + } else if (is_cqe_wr_imm(cqe)) { + ibwc->opcode = IB_WC_RECV_RDMA_WITH_IMM; + ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt)); + ibwc->wc_flags |= IB_WC_WITH_IMM; + } else if (is_cqe_invalidated(cqe)) { + ibwc->ex.invalidate_rkey = le32_to_cpu(cqe->rq.lkey_immdt); + ibwc->wc_flags |= IB_WC_WITH_INVALIDATE; + } + if (qp->ibqp.srq) { + ocrdma_update_free_srq_cqe(ibwc, cqe, qp); + } else { + ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail]; + ocrdma_hwq_inc_tail(&qp->rq); + } +} + +static bool ocrdma_poll_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe, + struct ib_wc *ibwc, bool *polled, bool *stop) +{ + int status; + bool expand = false; + + ibwc->wc_flags = 0; + if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) { + status = (le32_to_cpu(cqe->flags_status_srcqpn) & + OCRDMA_CQE_UD_STATUS_MASK) >> + OCRDMA_CQE_UD_STATUS_SHIFT; + } else { + status = (le32_to_cpu(cqe->flags_status_srcqpn) & + OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT; + } + + if (status == OCRDMA_CQE_SUCCESS) { + *polled = true; + ocrdma_poll_success_rcqe(qp, cqe, ibwc); + } else { + expand = ocrdma_poll_err_rcqe(qp, cqe, ibwc, polled, stop, + status); + } + return expand; +} + +static void ocrdma_change_cq_phase(struct ocrdma_cq *cq, struct ocrdma_cqe *cqe, + u16 cur_getp) +{ + if (cq->phase_change) { + if (cur_getp == 0) + cq->phase = (~cq->phase & OCRDMA_CQE_VALID); + } else { + /* clear valid bit */ + cqe->flags_status_srcqpn = 0; + } +} + +static int ocrdma_poll_hwcq(struct ocrdma_cq *cq, int num_entries, + struct ib_wc *ibwc) +{ + u16 qpn = 0; + int i = 0; + bool expand = false; + int polled_hw_cqes = 0; + struct ocrdma_qp *qp = NULL; + struct ocrdma_dev *dev = get_ocrdma_dev(cq->ibcq.device); + struct ocrdma_cqe *cqe; + u16 cur_getp; bool polled = false; bool stop = false; + + cur_getp = cq->getp; + while (num_entries) { + cqe = cq->va + cur_getp; + /* check whether valid cqe or not */ + if (!is_cqe_valid(cq, cqe)) + break; + qpn = (le32_to_cpu(cqe->cmn.qpn) & OCRDMA_CQE_QPN_MASK); + /* ignore discarded cqe */ + if (qpn == 0) + goto skip_cqe; + qp = dev->qp_tbl[qpn]; + BUG_ON(qp == NULL); + + if (is_cqe_for_sq(cqe)) { + expand = ocrdma_poll_scqe(qp, cqe, ibwc, &polled, + &stop); + } else { + expand = ocrdma_poll_rcqe(qp, cqe, ibwc, &polled, + &stop); + } + if (expand) + goto expand_cqe; + if (stop) + goto stop_cqe; + /* clear qpn to avoid duplicate processing by discard_cqe() */ + cqe->cmn.qpn = 0; +skip_cqe: + polled_hw_cqes += 1; + cur_getp = (cur_getp + 1) % cq->max_hw_cqe; + ocrdma_change_cq_phase(cq, cqe, cur_getp); +expand_cqe: + if (polled) { + num_entries -= 1; + i += 1; + ibwc = ibwc + 1; + polled = false; + } + } +stop_cqe: + cq->getp = cur_getp; + + if (polled_hw_cqes) + ocrdma_ring_cq_db(dev, cq->id, false, false, polled_hw_cqes); + + return i; +} + +/* insert error cqe if the QP's SQ or RQ's CQ matches the CQ under poll. */ +static int ocrdma_add_err_cqe(struct ocrdma_cq *cq, int num_entries, + struct ocrdma_qp *qp, struct ib_wc *ibwc) +{ + int err_cqes = 0; + + while (num_entries) { + if (is_hw_sq_empty(qp) && is_hw_rq_empty(qp)) + break; + if (!is_hw_sq_empty(qp) && qp->sq_cq == cq) { + ocrdma_update_wc(qp, ibwc, qp->sq.tail); + ocrdma_hwq_inc_tail(&qp->sq); + } else if (!is_hw_rq_empty(qp) && qp->rq_cq == cq) { + ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail]; + ocrdma_hwq_inc_tail(&qp->rq); + } else { + return err_cqes; + } + ibwc->byte_len = 0; + ibwc->status = IB_WC_WR_FLUSH_ERR; + ibwc = ibwc + 1; + err_cqes += 1; + num_entries -= 1; + } + return err_cqes; +} + +int ocrdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) +{ + int cqes_to_poll = num_entries; + struct ocrdma_cq *cq = get_ocrdma_cq(ibcq); + struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device); + int num_os_cqe = 0, err_cqes = 0; + struct ocrdma_qp *qp; + unsigned long flags; + + /* poll cqes from adapter CQ */ + spin_lock_irqsave(&cq->cq_lock, flags); + num_os_cqe = ocrdma_poll_hwcq(cq, cqes_to_poll, wc); + spin_unlock_irqrestore(&cq->cq_lock, flags); + cqes_to_poll -= num_os_cqe; + + if (cqes_to_poll) { + wc = wc + num_os_cqe; + /* adapter returns single error cqe when qp moves to + * error state. So insert error cqes with wc_status as + * FLUSHED for pending WQEs and RQEs of QP's SQ and RQ + * respectively which uses this CQ. + */ + spin_lock_irqsave(&dev->flush_q_lock, flags); + list_for_each_entry(qp, &cq->sq_head, sq_entry) { + if (cqes_to_poll == 0) + break; + err_cqes = ocrdma_add_err_cqe(cq, cqes_to_poll, qp, wc); + cqes_to_poll -= err_cqes; + num_os_cqe += err_cqes; + wc = wc + err_cqes; + } + spin_unlock_irqrestore(&dev->flush_q_lock, flags); + } + return num_os_cqe; +} + +int ocrdma_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags cq_flags) +{ + struct ocrdma_cq *cq = get_ocrdma_cq(ibcq); + struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device); + u16 cq_id; + unsigned long flags; + bool arm_needed = false, sol_needed = false; + + cq_id = cq->id; + + spin_lock_irqsave(&cq->cq_lock, flags); + if (cq_flags & IB_CQ_NEXT_COMP || cq_flags & IB_CQ_SOLICITED) + arm_needed = true; + if (cq_flags & IB_CQ_SOLICITED) + sol_needed = true; + + ocrdma_ring_cq_db(dev, cq_id, arm_needed, sol_needed, 0); + spin_unlock_irqrestore(&cq->cq_lock, flags); + + return 0; +} + +struct ib_mr *ocrdma_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type, + u32 max_num_sg) +{ + int status; + struct ocrdma_mr *mr; + struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); + struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device); + + if (mr_type != IB_MR_TYPE_MEM_REG) + return ERR_PTR(-EINVAL); + + if (max_num_sg > dev->attr.max_pages_per_frmr) + return ERR_PTR(-EINVAL); + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + mr->pages = kcalloc(max_num_sg, sizeof(u64), GFP_KERNEL); + if (!mr->pages) { + status = -ENOMEM; + goto pl_err; + } + + status = ocrdma_get_pbl_info(dev, mr, max_num_sg); + if (status) + goto pbl_err; + mr->hwmr.fr_mr = 1; + mr->hwmr.remote_rd = 0; + mr->hwmr.remote_wr = 0; + mr->hwmr.local_rd = 0; + mr->hwmr.local_wr = 0; + mr->hwmr.mw_bind = 0; + status = ocrdma_build_pbl_tbl(dev, &mr->hwmr); + if (status) + goto pbl_err; + status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, 0); + if (status) + goto mbx_err; + mr->ibmr.rkey = mr->hwmr.lkey; + mr->ibmr.lkey = mr->hwmr.lkey; + dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] = + (unsigned long) mr; + return &mr->ibmr; +mbx_err: + ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr); +pbl_err: + kfree(mr->pages); +pl_err: + kfree(mr); + return ERR_PTR(-ENOMEM); +} + +static int ocrdma_set_page(struct ib_mr *ibmr, u64 addr) +{ + struct ocrdma_mr *mr = get_ocrdma_mr(ibmr); + + if (unlikely(mr->npages == mr->hwmr.num_pbes)) + return -ENOMEM; + + mr->pages[mr->npages++] = addr; + + return 0; +} + +int ocrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int *sg_offset) +{ + struct ocrdma_mr *mr = get_ocrdma_mr(ibmr); + + mr->npages = 0; + + return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, ocrdma_set_page); +} |