FreeBSD/Linux Kernel Cross Reference
sys/dev/irdma/irdma_verbs.c

     /*-
      * SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
      *
      * Copyright (c) 2015 - 2022 Intel Corporation
      *
      * 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
     * OpenFabrics.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.
     */
    /*$FreeBSD$*/
    
    #include "irdma_main.h"
    
    /**
     * irdma_query_device - get device attributes
     * @ibdev: device pointer from stack
     * @props: returning device attributes
     * @udata: user data
     */
    static int
    irdma_query_device(struct ib_device *ibdev,
                       struct ib_device_attr *props,
                       struct ib_udata *udata)
    {
            struct irdma_device *iwdev = to_iwdev(ibdev);
            struct irdma_pci_f *rf = iwdev->rf;
            struct pci_dev *pcidev = iwdev->rf->pcidev;
            struct irdma_hw_attrs *hw_attrs = &rf->sc_dev.hw_attrs;
    
            if (udata->inlen || udata->outlen)
                    return -EINVAL;
    
            memset(props, 0, sizeof(*props));
            ether_addr_copy((u8 *)&props->sys_image_guid, IF_LLADDR(iwdev->netdev));
            props->fw_ver = (u64)irdma_fw_major_ver(&rf->sc_dev) << 32 |
                irdma_fw_minor_ver(&rf->sc_dev);
            props->device_cap_flags = IB_DEVICE_MEM_WINDOW |
                IB_DEVICE_MEM_MGT_EXTENSIONS;
            props->device_cap_flags |= IB_DEVICE_LOCAL_DMA_LKEY;
            props->vendor_id = pcidev->vendor;
            props->vendor_part_id = pcidev->device;
            props->hw_ver = pcidev->revision;
            props->page_size_cap = hw_attrs->page_size_cap;
            props->max_mr_size = hw_attrs->max_mr_size;
            props->max_qp = rf->max_qp - rf->used_qps;
            props->max_qp_wr = hw_attrs->max_qp_wr;
            set_max_sge(props, rf);
            props->max_cq = rf->max_cq - rf->used_cqs;
            props->max_cqe = rf->max_cqe - 1;
            props->max_mr = rf->max_mr - rf->used_mrs;
            props->max_mw = props->max_mr;
            props->max_pd = rf->max_pd - rf->used_pds;
            props->max_sge_rd = hw_attrs->uk_attrs.max_hw_read_sges;
            props->max_qp_rd_atom = hw_attrs->max_hw_ird;
            props->max_qp_init_rd_atom = hw_attrs->max_hw_ord;
            if (rdma_protocol_roce(ibdev, 1)) {
                    props->device_cap_flags |= IB_DEVICE_RC_RNR_NAK_GEN;
                    props->max_pkeys = IRDMA_PKEY_TBL_SZ;
                    props->max_ah = rf->max_ah;
                    if (hw_attrs->uk_attrs.hw_rev == IRDMA_GEN_2) {
                            props->max_mcast_grp = rf->max_mcg;
                            props->max_mcast_qp_attach = IRDMA_MAX_MGS_PER_CTX;
                            props->max_total_mcast_qp_attach = rf->max_qp * IRDMA_MAX_MGS_PER_CTX;
                    }
            }
            props->max_fast_reg_page_list_len = IRDMA_MAX_PAGES_PER_FMR;
            if (hw_attrs->uk_attrs.hw_rev >= IRDMA_GEN_2)
                    props->device_cap_flags |= IB_DEVICE_MEM_WINDOW_TYPE_2B;
    
            return 0;
    }
    
    static int
    irdma_mmap_legacy(struct irdma_ucontext *ucontext,
                      struct vm_area_struct *vma)
   {
           u64 pfn;
   
           if (vma->vm_pgoff || vma->vm_end - vma->vm_start != PAGE_SIZE)
                   return -EINVAL;
   
           vma->vm_private_data = ucontext;
           pfn = ((uintptr_t)ucontext->iwdev->rf->sc_dev.hw_regs[IRDMA_DB_ADDR_OFFSET] +
                  pci_resource_start(ucontext->iwdev->rf->pcidev, 0)) >> PAGE_SHIFT;
   
           return rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, PAGE_SIZE,
                                    pgprot_noncached(vma->vm_page_prot), NULL);
   }
   
   static void
   irdma_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
   {
           struct irdma_user_mmap_entry *entry = to_irdma_mmap_entry(rdma_entry);
   
           kfree(entry);
   }
   
   struct rdma_user_mmap_entry *
   irdma_user_mmap_entry_insert(struct irdma_ucontext *ucontext, u64 bar_offset,
                                enum irdma_mmap_flag mmap_flag, u64 *mmap_offset)
   {
           struct irdma_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
           int ret;
   
           if (!entry)
                   return NULL;
   
           entry->bar_offset = bar_offset;
           entry->mmap_flag = mmap_flag;
   
           ret = rdma_user_mmap_entry_insert(&ucontext->ibucontext,
                                             &entry->rdma_entry, PAGE_SIZE);
           if (ret) {
                   kfree(entry);
                   return NULL;
           }
           *mmap_offset = rdma_user_mmap_get_offset(&entry->rdma_entry);
   
           return &entry->rdma_entry;
   }
   
   /**
    * irdma_mmap - user memory map
    * @context: context created during alloc
    * @vma: kernel info for user memory map
    */
   static int
   irdma_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
   {
           struct rdma_user_mmap_entry *rdma_entry;
           struct irdma_user_mmap_entry *entry;
           struct irdma_ucontext *ucontext;
           u64 pfn;
           int ret;
   
           ucontext = to_ucontext(context);
   
           /* Legacy support for libi40iw with hard-coded mmap key */
           if (ucontext->legacy_mode)
                   return irdma_mmap_legacy(ucontext, vma);
   
           rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma);
           if (!rdma_entry) {
                   irdma_debug(iwdev_to_idev(ucontext->iwdev), IRDMA_DEBUG_VERBS,
                               "pgoff[0x%lx] does not have valid entry\n",
                               vma->vm_pgoff);
                   return -EINVAL;
           }
   
           entry = to_irdma_mmap_entry(rdma_entry);
           irdma_debug(iwdev_to_idev(ucontext->iwdev), IRDMA_DEBUG_VERBS,
                       "bar_offset [0x%lx] mmap_flag [%d]\n", entry->bar_offset,
                       entry->mmap_flag);
   
           pfn = (entry->bar_offset +
                  pci_resource_start(ucontext->iwdev->rf->pcidev, 0)) >> PAGE_SHIFT;
   
           switch (entry->mmap_flag) {
           case IRDMA_MMAP_IO_NC:
                   ret = rdma_user_mmap_io(context, vma, pfn, PAGE_SIZE,
                                           pgprot_noncached(vma->vm_page_prot),
                                           rdma_entry);
                   break;
           case IRDMA_MMAP_IO_WC:
                   ret = rdma_user_mmap_io(context, vma, pfn, PAGE_SIZE,
                                           pgprot_writecombine(vma->vm_page_prot),
                                           rdma_entry);
                   break;
           default:
                   ret = -EINVAL;
           }
   
           if (ret)
                   irdma_debug(iwdev_to_idev(ucontext->iwdev), IRDMA_DEBUG_VERBS,
                               "bar_offset [0x%lx] mmap_flag[%d] err[%d]\n",
                               entry->bar_offset, entry->mmap_flag, ret);
           rdma_user_mmap_entry_put(rdma_entry);
   
           return ret;
   }
   
   /**
    * irdma_alloc_push_page - allocate a push page for qp
    * @iwqp: qp pointer
    */
   static void
   irdma_alloc_push_page(struct irdma_qp *iwqp)
   {
           struct irdma_cqp_request *cqp_request;
           struct cqp_cmds_info *cqp_info;
           struct irdma_device *iwdev = iwqp->iwdev;
           struct irdma_sc_qp *qp = &iwqp->sc_qp;
           int status;
   
           cqp_request = irdma_alloc_and_get_cqp_request(&iwdev->rf->cqp, true);
           if (!cqp_request)
                   return;
   
           cqp_info = &cqp_request->info;
           cqp_info->cqp_cmd = IRDMA_OP_MANAGE_PUSH_PAGE;
           cqp_info->post_sq = 1;
           cqp_info->in.u.manage_push_page.info.push_idx = 0;
           cqp_info->in.u.manage_push_page.info.qs_handle =
               qp->vsi->qos[qp->user_pri].qs_handle;
           cqp_info->in.u.manage_push_page.info.free_page = 0;
           cqp_info->in.u.manage_push_page.info.push_page_type = 0;
           cqp_info->in.u.manage_push_page.cqp = &iwdev->rf->cqp.sc_cqp;
           cqp_info->in.u.manage_push_page.scratch = (uintptr_t)cqp_request;
   
           status = irdma_handle_cqp_op(iwdev->rf, cqp_request);
           if (!status && cqp_request->compl_info.op_ret_val <
               iwdev->rf->sc_dev.hw_attrs.max_hw_device_pages) {
                   qp->push_idx = cqp_request->compl_info.op_ret_val;
                   qp->push_offset = 0;
           }
   
           irdma_put_cqp_request(&iwdev->rf->cqp, cqp_request);
   }
   
   /**
    * irdma_get_pbl - Retrieve pbl from a list given a virtual
    * address
    * @va: user virtual address
    * @pbl_list: pbl list to search in (QP's or CQ's)
    */
   struct irdma_pbl *
   irdma_get_pbl(unsigned long va,
                 struct list_head *pbl_list)
   {
           struct irdma_pbl *iwpbl;
   
           list_for_each_entry(iwpbl, pbl_list, list) {
                   if (iwpbl->user_base == va) {
                           list_del(&iwpbl->list);
                           iwpbl->on_list = false;
                           return iwpbl;
                   }
           }
   
           return NULL;
   }
   
   /**
    * irdma_clean_cqes - clean cq entries for qp
    * @iwqp: qp ptr (user or kernel)
    * @iwcq: cq ptr
    */
   void
   irdma_clean_cqes(struct irdma_qp *iwqp, struct irdma_cq *iwcq)
   {
           struct irdma_cq_uk *ukcq = &iwcq->sc_cq.cq_uk;
           unsigned long flags;
   
           spin_lock_irqsave(&iwcq->lock, flags);
           irdma_uk_clean_cq(&iwqp->sc_qp.qp_uk, ukcq);
           spin_unlock_irqrestore(&iwcq->lock, flags);
   }
   
   static u64 irdma_compute_push_wqe_offset(struct irdma_device *iwdev, u32 page_idx){
           u64 bar_off = (uintptr_t)iwdev->rf->sc_dev.hw_regs[IRDMA_DB_ADDR_OFFSET];
   
           if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) {
                   /* skip over db page */
                   bar_off += IRDMA_HW_PAGE_SIZE;
                   /* skip over reserved space */
                   bar_off += IRDMA_PF_BAR_RSVD;
           }
   
           /* push wqe page */
           bar_off += (u64)page_idx * IRDMA_HW_PAGE_SIZE;
   
           return bar_off;
   }
   
   void
   irdma_remove_push_mmap_entries(struct irdma_qp *iwqp)
   {
           if (iwqp->push_db_mmap_entry) {
                   rdma_user_mmap_entry_remove(iwqp->push_db_mmap_entry);
                   iwqp->push_db_mmap_entry = NULL;
           }
           if (iwqp->push_wqe_mmap_entry) {
                   rdma_user_mmap_entry_remove(iwqp->push_wqe_mmap_entry);
                   iwqp->push_wqe_mmap_entry = NULL;
           }
   }
   
   static int
   irdma_setup_push_mmap_entries(struct irdma_ucontext *ucontext,
                                 struct irdma_qp *iwqp,
                                 u64 *push_wqe_mmap_key,
                                 u64 *push_db_mmap_key)
   {
           struct irdma_device *iwdev = ucontext->iwdev;
           u64 bar_off;
   
           WARN_ON_ONCE(iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev < IRDMA_GEN_2);
   
           bar_off = irdma_compute_push_wqe_offset(iwdev, iwqp->sc_qp.push_idx);
   
           iwqp->push_wqe_mmap_entry = irdma_user_mmap_entry_insert(ucontext,
                                                                    bar_off, IRDMA_MMAP_IO_WC,
                                                                    push_wqe_mmap_key);
           if (!iwqp->push_wqe_mmap_entry)
                   return -ENOMEM;
   
           /* push doorbell page */
           bar_off += IRDMA_HW_PAGE_SIZE;
           iwqp->push_db_mmap_entry = irdma_user_mmap_entry_insert(ucontext,
                                                                   bar_off, IRDMA_MMAP_IO_NC,
                                                                   push_db_mmap_key);
           if (!iwqp->push_db_mmap_entry) {
                   rdma_user_mmap_entry_remove(iwqp->push_wqe_mmap_entry);
                   return -ENOMEM;
           }
   
           return 0;
   }
   
   /**
    * irdma_setup_virt_qp - setup for allocation of virtual qp
    * @iwdev: irdma device
    * @iwqp: qp ptr
    * @init_info: initialize info to return
    */
   void
   irdma_setup_virt_qp(struct irdma_device *iwdev,
                       struct irdma_qp *iwqp,
                       struct irdma_qp_init_info *init_info)
   {
           struct irdma_pbl *iwpbl = iwqp->iwpbl;
           struct irdma_qp_mr *qpmr = &iwpbl->qp_mr;
   
           iwqp->page = qpmr->sq_page;
           init_info->shadow_area_pa = qpmr->shadow;
           if (iwpbl->pbl_allocated) {
                   init_info->virtual_map = true;
                   init_info->sq_pa = qpmr->sq_pbl.idx;
                   init_info->rq_pa = qpmr->rq_pbl.idx;
           } else {
                   init_info->sq_pa = qpmr->sq_pbl.addr;
                   init_info->rq_pa = qpmr->rq_pbl.addr;
           }
   }
   
   /**
    * irdma_setup_umode_qp - setup sq and rq size in user mode qp
    * @udata: user data
    * @iwdev: iwarp device
    * @iwqp: qp ptr (user or kernel)
    * @info: initialize info to return
    * @init_attr: Initial QP create attributes
    */
   int
   irdma_setup_umode_qp(struct ib_udata *udata,
                        struct irdma_device *iwdev,
                        struct irdma_qp *iwqp,
                        struct irdma_qp_init_info *info,
                        struct ib_qp_init_attr *init_attr)
   {
           struct irdma_qp_uk_init_info *ukinfo = &info->qp_uk_init_info;
           struct irdma_create_qp_req req = {0};
           unsigned long flags;
           int ret;
   
           ret = ib_copy_from_udata(&req, udata,
                                    min(sizeof(req), udata->inlen));
           if (ret) {
                   irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                               "ib_copy_from_data fail\n");
                   return ret;
           }
   
           iwqp->ctx_info.qp_compl_ctx = req.user_compl_ctx;
           iwqp->user_mode = 1;
           if (req.user_wqe_bufs) {
                   struct irdma_ucontext *ucontext = rdma_udata_to_drv_context(udata, struct irdma_ucontext, ibucontext);
   
                   info->qp_uk_init_info.legacy_mode = ucontext->legacy_mode;
                   spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
                   iwqp->iwpbl = irdma_get_pbl((unsigned long)req.user_wqe_bufs,
                                               &ucontext->qp_reg_mem_list);
                   spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
   
                   if (!iwqp->iwpbl) {
                           ret = -ENODATA;
                           irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                                       "no pbl info\n");
                           return ret;
                   }
           }
   
           if (ukinfo->abi_ver <= 5) {
                   /**
                    * For ABI version less than 6 passes raw sq and rq
                    * quanta in cap.max_send_wr and cap.max_recv_wr.
                    */
                   iwqp->max_send_wr = init_attr->cap.max_send_wr;
                   iwqp->max_recv_wr = init_attr->cap.max_recv_wr;
                   ukinfo->sq_size = init_attr->cap.max_send_wr;
                   ukinfo->rq_size = init_attr->cap.max_recv_wr;
                   irdma_uk_calc_shift_wq(ukinfo, &ukinfo->sq_shift, &ukinfo->rq_shift);
           } else {
                   ret = irdma_uk_calc_depth_shift_sq(ukinfo, &ukinfo->sq_depth,
                                                      &ukinfo->sq_shift);
                   if (ret)
                           return ret;
   
                   ret = irdma_uk_calc_depth_shift_rq(ukinfo, &ukinfo->rq_depth,
                                                      &ukinfo->rq_shift);
                   if (ret)
                           return ret;
   
                   iwqp->max_send_wr = (ukinfo->sq_depth - IRDMA_SQ_RSVD) >> ukinfo->sq_shift;
                   iwqp->max_recv_wr = (ukinfo->rq_depth - IRDMA_RQ_RSVD) >> ukinfo->rq_shift;
                   ukinfo->sq_size = ukinfo->sq_depth >> ukinfo->sq_shift;
                   ukinfo->rq_size = ukinfo->rq_depth >> ukinfo->rq_shift;
           }
           irdma_setup_virt_qp(iwdev, iwqp, info);
   
           return 0;
   }
   
   /**
    * irdma_setup_kmode_qp - setup initialization for kernel mode qp
    * @iwdev: iwarp device
    * @iwqp: qp ptr (user or kernel)
    * @info: initialize info to return
    * @init_attr: Initial QP create attributes
    */
   int
   irdma_setup_kmode_qp(struct irdma_device *iwdev,
                        struct irdma_qp *iwqp,
                        struct irdma_qp_init_info *info,
                        struct ib_qp_init_attr *init_attr)
   {
           struct irdma_dma_mem *mem = &iwqp->kqp.dma_mem;
           u32 size;
           int status;
           struct irdma_qp_uk_init_info *ukinfo = &info->qp_uk_init_info;
   
           status = irdma_uk_calc_depth_shift_sq(ukinfo, &ukinfo->sq_depth,
                                                 &ukinfo->sq_shift);
           if (status)
                   return status;
   
           status = irdma_uk_calc_depth_shift_rq(ukinfo, &ukinfo->rq_depth,
                                                 &ukinfo->rq_shift);
           if (status)
                   return status;
   
           iwqp->kqp.sq_wrid_mem =
               kcalloc(ukinfo->sq_depth, sizeof(*iwqp->kqp.sq_wrid_mem), GFP_KERNEL);
           if (!iwqp->kqp.sq_wrid_mem)
                   return -ENOMEM;
   
           iwqp->kqp.rq_wrid_mem =
               kcalloc(ukinfo->rq_depth, sizeof(*iwqp->kqp.rq_wrid_mem), GFP_KERNEL);
           if (!iwqp->kqp.rq_wrid_mem) {
                   kfree(iwqp->kqp.sq_wrid_mem);
                   iwqp->kqp.sq_wrid_mem = NULL;
                   return -ENOMEM;
           }
   
           iwqp->kqp.sig_trk_mem = kcalloc(ukinfo->sq_depth, sizeof(u32), GFP_KERNEL);
           memset(iwqp->kqp.sig_trk_mem, 0, ukinfo->sq_depth * sizeof(u32));
           if (!iwqp->kqp.sig_trk_mem) {
                   kfree(iwqp->kqp.sq_wrid_mem);
                   iwqp->kqp.sq_wrid_mem = NULL;
                   kfree(iwqp->kqp.rq_wrid_mem);
                   iwqp->kqp.rq_wrid_mem = NULL;
                   return -ENOMEM;
           }
           ukinfo->sq_sigwrtrk_array = (void *)iwqp->kqp.sig_trk_mem;
           ukinfo->sq_wrtrk_array = iwqp->kqp.sq_wrid_mem;
           ukinfo->rq_wrid_array = iwqp->kqp.rq_wrid_mem;
   
           size = (ukinfo->sq_depth + ukinfo->rq_depth) * IRDMA_QP_WQE_MIN_SIZE;
           size += (IRDMA_SHADOW_AREA_SIZE << 3);
   
           mem->size = size;
           mem->va = irdma_allocate_dma_mem(&iwdev->rf->hw, mem, mem->size,
                                            256);
           if (!mem->va) {
                   kfree(iwqp->kqp.sq_wrid_mem);
                   iwqp->kqp.sq_wrid_mem = NULL;
                   kfree(iwqp->kqp.rq_wrid_mem);
                   iwqp->kqp.rq_wrid_mem = NULL;
                   return -ENOMEM;
           }
   
           ukinfo->sq = mem->va;
           info->sq_pa = mem->pa;
           ukinfo->rq = &ukinfo->sq[ukinfo->sq_depth];
           info->rq_pa = info->sq_pa + (ukinfo->sq_depth * IRDMA_QP_WQE_MIN_SIZE);
           ukinfo->shadow_area = ukinfo->rq[ukinfo->rq_depth].elem;
           info->shadow_area_pa = info->rq_pa + (ukinfo->rq_depth * IRDMA_QP_WQE_MIN_SIZE);
           ukinfo->sq_size = ukinfo->sq_depth >> ukinfo->sq_shift;
           ukinfo->rq_size = ukinfo->rq_depth >> ukinfo->rq_shift;
           ukinfo->qp_id = iwqp->ibqp.qp_num;
   
           iwqp->max_send_wr = (ukinfo->sq_depth - IRDMA_SQ_RSVD) >> ukinfo->sq_shift;
           iwqp->max_recv_wr = (ukinfo->rq_depth - IRDMA_RQ_RSVD) >> ukinfo->rq_shift;
           init_attr->cap.max_send_wr = iwqp->max_send_wr;
           init_attr->cap.max_recv_wr = iwqp->max_recv_wr;
   
           return 0;
   }
   
   int
   irdma_cqp_create_qp_cmd(struct irdma_qp *iwqp)
   {
           struct irdma_pci_f *rf = iwqp->iwdev->rf;
           struct irdma_cqp_request *cqp_request;
           struct cqp_cmds_info *cqp_info;
           struct irdma_create_qp_info *qp_info;
           int status;
   
           cqp_request = irdma_alloc_and_get_cqp_request(&rf->cqp, true);
           if (!cqp_request)
                   return -ENOMEM;
   
           cqp_info = &cqp_request->info;
           qp_info = &cqp_request->info.in.u.qp_create.info;
           memset(qp_info, 0, sizeof(*qp_info));
           qp_info->mac_valid = true;
           qp_info->cq_num_valid = true;
           qp_info->next_iwarp_state = IRDMA_QP_STATE_IDLE;
   
           cqp_info->cqp_cmd = IRDMA_OP_QP_CREATE;
           cqp_info->post_sq = 1;
           cqp_info->in.u.qp_create.qp = &iwqp->sc_qp;
           cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
           status = irdma_handle_cqp_op(rf, cqp_request);
           irdma_put_cqp_request(&rf->cqp, cqp_request);
   
           return status;
   }
   
   void
   irdma_roce_fill_and_set_qpctx_info(struct irdma_qp *iwqp,
                                      struct irdma_qp_host_ctx_info *ctx_info)
   {
           struct irdma_device *iwdev = iwqp->iwdev;
           struct irdma_sc_dev *dev = &iwdev->rf->sc_dev;
           struct irdma_roce_offload_info *roce_info;
           struct irdma_udp_offload_info *udp_info;
   
           udp_info = &iwqp->udp_info;
           udp_info->snd_mss = ib_mtu_enum_to_int(ib_mtu_int_to_enum(iwdev->vsi.mtu));
           udp_info->cwnd = iwdev->roce_cwnd;
           udp_info->rexmit_thresh = 2;
           udp_info->rnr_nak_thresh = 2;
           udp_info->src_port = 0xc000;
           udp_info->dst_port = ROCE_V2_UDP_DPORT;
           roce_info = &iwqp->roce_info;
           ether_addr_copy(roce_info->mac_addr, IF_LLADDR(iwdev->netdev));
   
           roce_info->rd_en = true;
           roce_info->wr_rdresp_en = true;
           roce_info->bind_en = true;
           roce_info->dcqcn_en = false;
           roce_info->rtomin = 5;
   
           roce_info->ack_credits = iwdev->roce_ackcreds;
           roce_info->ird_size = dev->hw_attrs.max_hw_ird;
           roce_info->ord_size = dev->hw_attrs.max_hw_ord;
   
           if (!iwqp->user_mode) {
                   roce_info->priv_mode_en = true;
                   roce_info->fast_reg_en = true;
                   roce_info->udprivcq_en = true;
           }
           roce_info->roce_tver = 0;
   
           ctx_info->roce_info = &iwqp->roce_info;
           ctx_info->udp_info = &iwqp->udp_info;
           irdma_sc_qp_setctx_roce(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
   }
   
   void
   irdma_iw_fill_and_set_qpctx_info(struct irdma_qp *iwqp,
                                    struct irdma_qp_host_ctx_info *ctx_info)
   {
           struct irdma_device *iwdev = iwqp->iwdev;
           struct irdma_sc_dev *dev = &iwdev->rf->sc_dev;
           struct irdma_iwarp_offload_info *iwarp_info;
   
           iwarp_info = &iwqp->iwarp_info;
           ether_addr_copy(iwarp_info->mac_addr, IF_LLADDR(iwdev->netdev));
           iwarp_info->rd_en = true;
           iwarp_info->wr_rdresp_en = true;
           iwarp_info->bind_en = true;
           iwarp_info->ecn_en = true;
           iwarp_info->rtomin = 5;
   
           if (dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2)
                   iwarp_info->ib_rd_en = true;
           if (!iwqp->user_mode) {
                   iwarp_info->priv_mode_en = true;
                   iwarp_info->fast_reg_en = true;
           }
           iwarp_info->ddp_ver = 1;
           iwarp_info->rdmap_ver = 1;
   
           ctx_info->iwarp_info = &iwqp->iwarp_info;
           ctx_info->iwarp_info_valid = true;
           irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
           ctx_info->iwarp_info_valid = false;
   }
   
   int
   irdma_validate_qp_attrs(struct ib_qp_init_attr *init_attr,
                           struct irdma_device *iwdev)
   {
           struct irdma_sc_dev *dev = &iwdev->rf->sc_dev;
           struct irdma_uk_attrs *uk_attrs = &dev->hw_attrs.uk_attrs;
   
           if (init_attr->create_flags)
                   return -EOPNOTSUPP;
   
           if (init_attr->cap.max_inline_data > uk_attrs->max_hw_inline ||
               init_attr->cap.max_send_sge > uk_attrs->max_hw_wq_frags ||
               init_attr->cap.max_recv_sge > uk_attrs->max_hw_wq_frags)
                   return -EINVAL;
   
           if (rdma_protocol_roce(&iwdev->ibdev, 1)) {
                   if (init_attr->qp_type != IB_QPT_RC &&
                       init_attr->qp_type != IB_QPT_UD &&
                       init_attr->qp_type != IB_QPT_GSI)
                           return -EOPNOTSUPP;
           } else {
                   if (init_attr->qp_type != IB_QPT_RC)
                           return -EOPNOTSUPP;
           }
   
           return 0;
   }
   
   void
   irdma_sched_qp_flush_work(struct irdma_qp *iwqp)
   {
           irdma_qp_add_ref(&iwqp->ibqp);
           if (mod_delayed_work(iwqp->iwdev->cleanup_wq, &iwqp->dwork_flush,
                                msecs_to_jiffies(IRDMA_FLUSH_DELAY_MS)))
                   irdma_qp_rem_ref(&iwqp->ibqp);
   }
   
   void
   irdma_flush_worker(struct work_struct *work)
   {
           struct delayed_work *dwork = to_delayed_work(work);
           struct irdma_qp *iwqp = container_of(dwork, struct irdma_qp, dwork_flush);
   
           irdma_generate_flush_completions(iwqp);
           /* For the add in irdma_sched_qp_flush_work */
           irdma_qp_rem_ref(&iwqp->ibqp);
   }
   
   static int
   irdma_get_ib_acc_flags(struct irdma_qp *iwqp)
   {
           int acc_flags = 0;
   
           if (rdma_protocol_roce(iwqp->ibqp.device, 1)) {
                   if (iwqp->roce_info.wr_rdresp_en) {
                           acc_flags |= IB_ACCESS_LOCAL_WRITE;
                           acc_flags |= IB_ACCESS_REMOTE_WRITE;
                   }
                   if (iwqp->roce_info.rd_en)
                           acc_flags |= IB_ACCESS_REMOTE_READ;
                   if (iwqp->roce_info.bind_en)
                           acc_flags |= IB_ACCESS_MW_BIND;
           } else {
                   if (iwqp->iwarp_info.wr_rdresp_en) {
                           acc_flags |= IB_ACCESS_LOCAL_WRITE;
                           acc_flags |= IB_ACCESS_REMOTE_WRITE;
                   }
                   if (iwqp->iwarp_info.rd_en)
                           acc_flags |= IB_ACCESS_REMOTE_READ;
                   if (iwqp->iwarp_info.bind_en)
                           acc_flags |= IB_ACCESS_MW_BIND;
           }
           return acc_flags;
   }
   
   /**
    * irdma_query_qp - query qp attributes
    * @ibqp: qp pointer
    * @attr: attributes pointer
    * @attr_mask: Not used
    * @init_attr: qp attributes to return
    */
   static int
   irdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
                  int attr_mask, struct ib_qp_init_attr *init_attr)
   {
           struct irdma_qp *iwqp = to_iwqp(ibqp);
           struct irdma_sc_qp *qp = &iwqp->sc_qp;
   
           memset(attr, 0, sizeof(*attr));
           memset(init_attr, 0, sizeof(*init_attr));
   
           attr->qp_state = iwqp->ibqp_state;
           attr->cur_qp_state = iwqp->ibqp_state;
           attr->cap.max_send_wr = iwqp->max_send_wr;
           attr->cap.max_recv_wr = iwqp->max_recv_wr;
           attr->cap.max_inline_data = qp->qp_uk.max_inline_data;
           attr->cap.max_send_sge = qp->qp_uk.max_sq_frag_cnt;
           attr->cap.max_recv_sge = qp->qp_uk.max_rq_frag_cnt;
           attr->qp_access_flags = irdma_get_ib_acc_flags(iwqp);
           attr->port_num = 1;
           if (rdma_protocol_roce(ibqp->device, 1)) {
                   attr->path_mtu = ib_mtu_int_to_enum(iwqp->udp_info.snd_mss);
                   attr->qkey = iwqp->roce_info.qkey;
                   attr->rq_psn = iwqp->udp_info.epsn;
                   attr->sq_psn = iwqp->udp_info.psn_nxt;
                   attr->dest_qp_num = iwqp->roce_info.dest_qp;
                   attr->pkey_index = iwqp->roce_info.p_key;
                   attr->retry_cnt = iwqp->udp_info.rexmit_thresh;
                   attr->rnr_retry = iwqp->udp_info.rnr_nak_thresh;
                   attr->max_rd_atomic = iwqp->roce_info.ord_size;
                   attr->max_dest_rd_atomic = iwqp->roce_info.ird_size;
           }
   
           init_attr->event_handler = iwqp->ibqp.event_handler;
           init_attr->qp_context = iwqp->ibqp.qp_context;
           init_attr->send_cq = iwqp->ibqp.send_cq;
           init_attr->recv_cq = iwqp->ibqp.recv_cq;
           init_attr->cap = attr->cap;
   
           return 0;
   }
   
   /**
    * irdma_modify_qp_roce - modify qp request
    * @ibqp: qp's pointer for modify
    * @attr: access attributes
    * @attr_mask: state mask
    * @udata: user data
    */
   int
   irdma_modify_qp_roce(struct ib_qp *ibqp, struct ib_qp_attr *attr,
                        int attr_mask, struct ib_udata *udata)
   {
   #define IRDMA_MODIFY_QP_MIN_REQ_LEN offsetofend(struct irdma_modify_qp_req, rq_flush)
   #define IRDMA_MODIFY_QP_MIN_RESP_LEN offsetofend(struct irdma_modify_qp_resp, push_valid)
           struct irdma_pd *iwpd = to_iwpd(ibqp->pd);
           struct irdma_qp *iwqp = to_iwqp(ibqp);
           struct irdma_device *iwdev = iwqp->iwdev;
           struct irdma_sc_dev *dev = &iwdev->rf->sc_dev;
           struct irdma_qp_host_ctx_info *ctx_info;
           struct irdma_roce_offload_info *roce_info;
           struct irdma_udp_offload_info *udp_info;
           struct irdma_modify_qp_info info = {0};
           struct irdma_modify_qp_resp uresp = {};
           struct irdma_modify_qp_req ureq;
           unsigned long flags;
           u8 issue_modify_qp = 0;
           int ret = 0;
   
           ctx_info = &iwqp->ctx_info;
           roce_info = &iwqp->roce_info;
           udp_info = &iwqp->udp_info;
   
           if (udata) {
                   if ((udata->inlen && udata->inlen < IRDMA_MODIFY_QP_MIN_REQ_LEN) ||
                       (udata->outlen && udata->outlen < IRDMA_MODIFY_QP_MIN_RESP_LEN))
                           return -EINVAL;
           }
   
           if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
                   return -EOPNOTSUPP;
   
           if (attr_mask & IB_QP_DEST_QPN)
                   roce_info->dest_qp = attr->dest_qp_num;
   
           if (attr_mask & IB_QP_PKEY_INDEX) {
                   ret = irdma_query_pkey(ibqp->device, 0, attr->pkey_index,
                                          &roce_info->p_key);
                   if (ret)
                           return ret;
           }
   
           if (attr_mask & IB_QP_QKEY)
                   roce_info->qkey = attr->qkey;
   
           if (attr_mask & IB_QP_PATH_MTU)
                   udp_info->snd_mss = ib_mtu_enum_to_int(attr->path_mtu);
   
           if (attr_mask & IB_QP_SQ_PSN) {
                   udp_info->psn_nxt = attr->sq_psn;
                   udp_info->lsn = 0xffff;
                   udp_info->psn_una = attr->sq_psn;
                   udp_info->psn_max = attr->sq_psn;
           }
   
           if (attr_mask & IB_QP_RQ_PSN)
                   udp_info->epsn = attr->rq_psn;
   
           if (attr_mask & IB_QP_RNR_RETRY)
                   udp_info->rnr_nak_thresh = attr->rnr_retry;
   
           if (attr_mask & IB_QP_RETRY_CNT)
                   udp_info->rexmit_thresh = attr->retry_cnt;
   
           ctx_info->roce_info->pd_id = iwpd->sc_pd.pd_id;
   
           if (attr_mask & IB_QP_AV) {
                   struct irdma_av *av = &iwqp->roce_ah.av;
                   u16 vlan_id = VLAN_N_VID;
                   u32 local_ip[4] = {};
   
                   memset(&iwqp->roce_ah, 0, sizeof(iwqp->roce_ah));
                   if (attr->ah_attr.ah_flags & IB_AH_GRH) {
                           udp_info->ttl = attr->ah_attr.grh.hop_limit;
                           udp_info->flow_label = attr->ah_attr.grh.flow_label;
                           udp_info->tos = attr->ah_attr.grh.traffic_class;
   
                           udp_info->src_port = kc_rdma_get_udp_sport(udp_info->flow_label,
                                                                      ibqp->qp_num,
                                                                      roce_info->dest_qp);
   
                           irdma_qp_rem_qos(&iwqp->sc_qp);
                           dev->ws_remove(iwqp->sc_qp.vsi, ctx_info->user_pri);
                           if (iwqp->sc_qp.vsi->dscp_mode)
                                   ctx_info->user_pri =
                                       iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(udp_info->tos)];
                           else
                                   ctx_info->user_pri = rt_tos2priority(udp_info->tos);
                   }
                   ret = kc_irdma_set_roce_cm_info(iwqp, attr, &vlan_id);
                   if (ret)
                           return ret;
                   if (dev->ws_add(iwqp->sc_qp.vsi, ctx_info->user_pri))
                           return -ENOMEM;
                   iwqp->sc_qp.user_pri = ctx_info->user_pri;
                   irdma_qp_add_qos(&iwqp->sc_qp);
   
                   if (vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
                           vlan_id = 0;
                   if (vlan_id < VLAN_N_VID) {
                           udp_info->insert_vlan_tag = true;
                           udp_info->vlan_tag = vlan_id |
                               ctx_info->user_pri << VLAN_PRIO_SHIFT;
                   } else {
                           udp_info->insert_vlan_tag = false;
                   }
   
                   av->attrs = attr->ah_attr;
                   rdma_gid2ip((struct sockaddr *)&av->dgid_addr, &attr->ah_attr.grh.dgid);
                   if (av->sgid_addr.saddr.sa_family == AF_INET6) {
                           __be32 *daddr =
                           av->dgid_addr.saddr_in6.sin6_addr.__u6_addr.__u6_addr32;
                           __be32 *saddr =
                           av->sgid_addr.saddr_in6.sin6_addr.__u6_addr.__u6_addr32;
   
                           irdma_copy_ip_ntohl(&udp_info->dest_ip_addr[0], daddr);
                           irdma_copy_ip_ntohl(&udp_info->local_ipaddr[0], saddr);
   
                           udp_info->ipv4 = false;
                           irdma_copy_ip_ntohl(local_ip, daddr);
   
                           udp_info->arp_idx = irdma_arp_table(iwdev->rf, local_ip,
                                                               NULL, IRDMA_ARP_RESOLVE);
                   } else {
                           __be32 saddr = av->sgid_addr.saddr_in.sin_addr.s_addr;
                           __be32 daddr = av->dgid_addr.saddr_in.sin_addr.s_addr;
   
                           local_ip[0] = ntohl(daddr);
   
                           udp_info->ipv4 = true;
                           udp_info->dest_ip_addr[0] = 0;
                           udp_info->dest_ip_addr[1] = 0;
                           udp_info->dest_ip_addr[2] = 0;
                           udp_info->dest_ip_addr[3] = local_ip[0];
   
                           udp_info->local_ipaddr[0] = 0;
                           udp_info->local_ipaddr[1] = 0;
                           udp_info->local_ipaddr[2] = 0;
                           udp_info->local_ipaddr[3] = ntohl(saddr);
                   }
                   udp_info->arp_idx =
                       irdma_add_arp(iwdev->rf, local_ip,
                                     ah_attr_to_dmac(attr->ah_attr));
           }
   
           if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
                   if (attr->max_rd_atomic > dev->hw_attrs.max_hw_ord) {
                           ibdev_err(&iwdev->ibdev,
                                     "rd_atomic = %d, above max_hw_ord=%d\n",
                                     attr->max_rd_atomic,
                                     dev->hw_attrs.max_hw_ord);
                           return -EINVAL;
                   }
                   if (attr->max_rd_atomic)
                           roce_info->ord_size = attr->max_rd_atomic;
                   info.ord_valid = true;
           }
   
           if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
                   if (attr->max_dest_rd_atomic > dev->hw_attrs.max_hw_ird) {
                           ibdev_err(&iwdev->ibdev,
                                     "rd_atomic = %d, above max_hw_ird=%d\n",
                                     attr->max_rd_atomic,
                                     dev->hw_attrs.max_hw_ird);
                           return -EINVAL;
                   }
                   if (attr->max_dest_rd_atomic)
                           roce_info->ird_size = attr->max_dest_rd_atomic;
           }
   
           if (attr_mask & IB_QP_ACCESS_FLAGS) {
                   if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE)
                           roce_info->wr_rdresp_en = true;
                   if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE)
                           roce_info->wr_rdresp_en = true;
                   if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ)
                           roce_info->rd_en = true;
           }
   
           wait_event(iwqp->mod_qp_waitq, !atomic_read(&iwqp->hw_mod_qp_pend));
   
           irdma_debug(dev, IRDMA_DEBUG_VERBS,
                       "caller: %pS qp_id=%d to_ibqpstate=%d ibqpstate=%d irdma_qpstate=%d attr_mask=0x%x\n",
                       __builtin_return_address(0), ibqp->qp_num, attr->qp_state, iwqp->ibqp_state,
                       iwqp->iwarp_state, attr_mask);
   
           spin_lock_irqsave(&iwqp->lock, flags);
           if (attr_mask & IB_QP_STATE) {
                   if (!kc_ib_modify_qp_is_ok(iwqp->ibqp_state, attr->qp_state,
                                              iwqp->ibqp.qp_type, attr_mask,
                                              IB_LINK_LAYER_ETHERNET)) {
                           irdma_print("modify_qp invalid for qp_id=%d, old_state=0x%x, new_state=0x%x\n",
                                       iwqp->ibqp.qp_num, iwqp->ibqp_state,
                                       attr->qp_state);
                           ret = -EINVAL;
                           goto exit;
                   }
                   info.curr_iwarp_state = iwqp->iwarp_state;
   
                   switch (attr->qp_state) {
                   case IB_QPS_INIT:
                           if (iwqp->iwarp_state > IRDMA_QP_STATE_IDLE) {
                                   ret = -EINVAL;
                                   goto exit;
                           }
   
                           if (iwqp->iwarp_state == IRDMA_QP_STATE_INVALID) {
                                   info.next_iwarp_state = IRDMA_QP_STATE_IDLE;
                                   issue_modify_qp = 1;
                           }
                           break;
                   case IB_QPS_RTR:
                           if (iwqp->iwarp_state > IRDMA_QP_STATE_IDLE) {
                                   ret = -EINVAL;
                                   goto exit;
                           }
                           info.arp_cache_idx_valid = true;
                           info.cq_num_valid = true;
                           info.next_iwarp_state = IRDMA_QP_STATE_RTR;
                           issue_modify_qp = 1;
                           break;
                   case IB_QPS_RTS:
                           if (iwqp->ibqp_state < IB_QPS_RTR ||
                               iwqp->ibqp_state == IB_QPS_ERR) {
                                   ret = -EINVAL;
                                   goto exit;
                           }
   
                           info.arp_cache_idx_valid = true;
                           info.cq_num_valid = true;
                           info.ord_valid = true;
                           info.next_iwarp_state = IRDMA_QP_STATE_RTS;
                           issue_modify_qp = 1;
                          if (dev->hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2)
                                  iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp);
                          udp_info->cwnd = iwdev->roce_cwnd;
                          roce_info->ack_credits = iwdev->roce_ackcreds;
                          if (iwdev->push_mode && udata &&
                              iwqp->sc_qp.push_idx == IRDMA_INVALID_PUSH_PAGE_INDEX &&
                              dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
                                  spin_unlock_irqrestore(&iwqp->lock, flags);
                                  irdma_alloc_push_page(iwqp);
                                  spin_lock_irqsave(&iwqp->lock, flags);
                          }
                          break;
                  case IB_QPS_SQD:
                          if (iwqp->iwarp_state == IRDMA_QP_STATE_SQD)
                                  goto exit;
  
                          if (iwqp->iwarp_state != IRDMA_QP_STATE_RTS) {
                                  ret = -EINVAL;
                                  goto exit;
                          }
  
                          info.next_iwarp_state = IRDMA_QP_STATE_SQD;
                          issue_modify_qp = 1;
                          break;
                  case IB_QPS_SQE:
                  case IB_QPS_ERR:
                  case IB_QPS_RESET:
                          if (iwqp->iwarp_state == IRDMA_QP_STATE_RTS) {
                                  spin_unlock_irqrestore(&iwqp->lock, flags);
                                  info.next_iwarp_state = IRDMA_QP_STATE_SQD;
                                  irdma_hw_modify_qp(iwdev, iwqp, &info, true);
                                  spin_lock_irqsave(&iwqp->lock, flags);
                          }
  
                          if (iwqp->iwarp_state == IRDMA_QP_STATE_ERROR) {
                                  spin_unlock_irqrestore(&iwqp->lock, flags);
                                  if (udata && udata->inlen) {
                                          if (ib_copy_from_udata(&ureq, udata,
                                                                 min(sizeof(ureq), udata->inlen)))
                                                  return -EINVAL;
  
                                          irdma_flush_wqes(iwqp,
                                                           (ureq.sq_flush ? IRDMA_FLUSH_SQ : 0) |
                                                           (ureq.rq_flush ? IRDMA_FLUSH_RQ : 0) |
                                                           IRDMA_REFLUSH);
                                  }
                                  return 0;
                          }
  
                          info.next_iwarp_state = IRDMA_QP_STATE_ERROR;
                          issue_modify_qp = 1;
                          break;
                  default:
                          ret = -EINVAL;
                          goto exit;
                  }
  
                  iwqp->ibqp_state = attr->qp_state;
          }
  
          ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
          ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
          irdma_sc_qp_setctx_roce(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
          spin_unlock_irqrestore(&iwqp->lock, flags);
  
          if (attr_mask & IB_QP_STATE) {
                  if (issue_modify_qp) {
                          ctx_info->rem_endpoint_idx = udp_info->arp_idx;
                          if (irdma_hw_modify_qp(iwdev, iwqp, &info, true))
                                  return -EINVAL;
                          spin_lock_irqsave(&iwqp->lock, flags);
                          if (iwqp->iwarp_state == info.curr_iwarp_state) {
                                  iwqp->iwarp_state = info.next_iwarp_state;
                                  iwqp->ibqp_state = attr->qp_state;
                          }
                          if (iwqp->ibqp_state > IB_QPS_RTS &&
                              !iwqp->flush_issued) {
                                  spin_unlock_irqrestore(&iwqp->lock, flags);
                                  irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ |
                                                   IRDMA_FLUSH_RQ |
                                                   IRDMA_FLUSH_WAIT);
                                  iwqp->flush_issued = 1;
  
                          } else {
                                  spin_unlock_irqrestore(&iwqp->lock, flags);
                          }
                  } else {
                          iwqp->ibqp_state = attr->qp_state;
                  }
                  if (udata && udata->outlen && dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
                          struct irdma_ucontext *ucontext;
  
                          ucontext = rdma_udata_to_drv_context(udata,
                                                               struct irdma_ucontext, ibucontext);
                          if (iwqp->sc_qp.push_idx != IRDMA_INVALID_PUSH_PAGE_INDEX &&
                              !iwqp->push_wqe_mmap_entry &&
                              !irdma_setup_push_mmap_entries(ucontext, iwqp,
                                                             &uresp.push_wqe_mmap_key, &uresp.push_db_mmap_key)) {
                                  uresp.push_valid = 1;
                                  uresp.push_offset = iwqp->sc_qp.push_offset;
                          }
                          uresp.rd_fence_rate = iwdev->rd_fence_rate;
                          ret = ib_copy_to_udata(udata, &uresp, min(sizeof(uresp),
                                                                    udata->outlen));
                          if (ret) {
                                  irdma_remove_push_mmap_entries(iwqp);
                                  irdma_debug(iwdev_to_idev(iwdev),
                                              IRDMA_DEBUG_VERBS,
                                              "copy_to_udata failed\n");
                                  return ret;
                          }
                  }
          }
  
          return 0;
  exit:
          spin_unlock_irqrestore(&iwqp->lock, flags);
  
          return ret;
  }
  
  /**
   * irdma_modify_qp - modify qp request
   * @ibqp: qp's pointer for modify
   * @attr: access attributes
   * @attr_mask: state mask
   * @udata: user data
   */
  int
  irdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
                  struct ib_udata *udata)
  {
  #define IRDMA_MODIFY_QP_MIN_REQ_LEN offsetofend(struct irdma_modify_qp_req, rq_flush)
  #define IRDMA_MODIFY_QP_MIN_RESP_LEN offsetofend(struct irdma_modify_qp_resp, push_valid)
          struct irdma_qp *iwqp = to_iwqp(ibqp);
          struct irdma_device *iwdev = iwqp->iwdev;
          struct irdma_sc_dev *dev = &iwdev->rf->sc_dev;
          struct irdma_qp_host_ctx_info *ctx_info;
          struct irdma_tcp_offload_info *tcp_info;
          struct irdma_iwarp_offload_info *offload_info;
          struct irdma_modify_qp_info info = {0};
          struct irdma_modify_qp_resp uresp = {};
          struct irdma_modify_qp_req ureq = {};
          u8 issue_modify_qp = 0;
          u8 dont_wait = 0;
          int err;
          unsigned long flags;
  
          if (udata) {
                  if ((udata->inlen && udata->inlen < IRDMA_MODIFY_QP_MIN_REQ_LEN) ||
                      (udata->outlen && udata->outlen < IRDMA_MODIFY_QP_MIN_RESP_LEN))
                          return -EINVAL;
          }
  
          if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
                  return -EOPNOTSUPP;
  
          ctx_info = &iwqp->ctx_info;
          offload_info = &iwqp->iwarp_info;
          tcp_info = &iwqp->tcp_info;
          wait_event(iwqp->mod_qp_waitq, !atomic_read(&iwqp->hw_mod_qp_pend));
          irdma_debug(dev, IRDMA_DEBUG_VERBS,
                      "caller: %pS qp_id=%d to_ibqpstate=%d ibqpstate=%d irdma_qpstate=%d last_aeq=%d hw_tcp_state=%d hw_iwarp_state=%d attr_mask=0x%x\n",
                      __builtin_return_address(0), ibqp->qp_num, attr->qp_state, iwqp->ibqp_state, iwqp->iwarp_state,
                      iwqp->last_aeq, iwqp->hw_tcp_state, iwqp->hw_iwarp_state, attr_mask);
  
          spin_lock_irqsave(&iwqp->lock, flags);
          if (attr_mask & IB_QP_STATE) {
                  info.curr_iwarp_state = iwqp->iwarp_state;
                  switch (attr->qp_state) {
                  case IB_QPS_INIT:
                  case IB_QPS_RTR:
                          if (iwqp->iwarp_state > IRDMA_QP_STATE_IDLE) {
                                  err = -EINVAL;
                                  goto exit;
                          }
  
                          if (iwqp->iwarp_state == IRDMA_QP_STATE_INVALID) {
                                  info.next_iwarp_state = IRDMA_QP_STATE_IDLE;
                                  issue_modify_qp = 1;
                          }
                          if (iwdev->push_mode && udata &&
                              iwqp->sc_qp.push_idx == IRDMA_INVALID_PUSH_PAGE_INDEX &&
                              dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
                                  spin_unlock_irqrestore(&iwqp->lock, flags);
                                  irdma_alloc_push_page(iwqp);
                                  spin_lock_irqsave(&iwqp->lock, flags);
                          }
                          break;
                  case IB_QPS_RTS:
                          if (iwqp->iwarp_state > IRDMA_QP_STATE_RTS ||
                              !iwqp->cm_id) {
                                  err = -EINVAL;
                                  goto exit;
                          }
  
                          issue_modify_qp = 1;
                          iwqp->hw_tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
                          iwqp->hte_added = 1;
                          info.next_iwarp_state = IRDMA_QP_STATE_RTS;
                          info.tcp_ctx_valid = true;
                          info.ord_valid = true;
                          info.arp_cache_idx_valid = true;
                          info.cq_num_valid = true;
                          break;
                  case IB_QPS_SQD:
                          if (iwqp->hw_iwarp_state > IRDMA_QP_STATE_RTS) {
                                  err = 0;
                                  goto exit;
                          }
  
                          if (iwqp->iwarp_state == IRDMA_QP_STATE_CLOSING ||
                              iwqp->iwarp_state < IRDMA_QP_STATE_RTS) {
                                  err = 0;
                                  goto exit;
                          }
  
                          if (iwqp->iwarp_state > IRDMA_QP_STATE_CLOSING) {
                                  err = -EINVAL;
                                  goto exit;
                          }
  
                          info.next_iwarp_state = IRDMA_QP_STATE_CLOSING;
                          issue_modify_qp = 1;
                          break;
                  case IB_QPS_SQE:
                          if (iwqp->iwarp_state >= IRDMA_QP_STATE_TERMINATE) {
                                  err = -EINVAL;
                                  goto exit;
                          }
  
                          info.next_iwarp_state = IRDMA_QP_STATE_TERMINATE;
                          issue_modify_qp = 1;
                          break;
                  case IB_QPS_ERR:
                  case IB_QPS_RESET:
                          if (iwqp->iwarp_state == IRDMA_QP_STATE_ERROR) {
                                  spin_unlock_irqrestore(&iwqp->lock, flags);
                                  if (udata && udata->inlen) {
                                          if (ib_copy_from_udata(&ureq, udata,
                                                                 min(sizeof(ureq), udata->inlen)))
                                                  return -EINVAL;
  
                                          irdma_flush_wqes(iwqp,
                                                           (ureq.sq_flush ? IRDMA_FLUSH_SQ : 0) |
                                                           (ureq.rq_flush ? IRDMA_FLUSH_RQ : 0) |
                                                           IRDMA_REFLUSH);
                                  }
                                  return 0;
                          }
  
                          if (iwqp->sc_qp.term_flags) {
                                  spin_unlock_irqrestore(&iwqp->lock, flags);
                                  irdma_terminate_del_timer(&iwqp->sc_qp);
                                  spin_lock_irqsave(&iwqp->lock, flags);
                          }
                          info.next_iwarp_state = IRDMA_QP_STATE_ERROR;
                          if (iwqp->hw_tcp_state > IRDMA_TCP_STATE_CLOSED &&
                              iwdev->iw_status &&
                              iwqp->hw_tcp_state != IRDMA_TCP_STATE_TIME_WAIT)
                                  info.reset_tcp_conn = true;
                          else
                                  dont_wait = 1;
  
                          issue_modify_qp = 1;
                          info.next_iwarp_state = IRDMA_QP_STATE_ERROR;
                          break;
                  default:
                          err = -EINVAL;
                          goto exit;
                  }
  
                  iwqp->ibqp_state = attr->qp_state;
          }
          if (attr_mask & IB_QP_ACCESS_FLAGS) {
                  ctx_info->iwarp_info_valid = true;
                  if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE)
                          offload_info->wr_rdresp_en = true;
                  if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE)
                          offload_info->wr_rdresp_en = true;
                  if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ)
                          offload_info->rd_en = true;
          }
  
          if (ctx_info->iwarp_info_valid) {
                  ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
                  ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
                  irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
          }
          spin_unlock_irqrestore(&iwqp->lock, flags);
  
          if (attr_mask & IB_QP_STATE) {
                  if (issue_modify_qp) {
                          ctx_info->rem_endpoint_idx = tcp_info->arp_idx;
                          if (irdma_hw_modify_qp(iwdev, iwqp, &info, true))
                                  return -EINVAL;
                  }
  
                  spin_lock_irqsave(&iwqp->lock, flags);
                  if (iwqp->iwarp_state == info.curr_iwarp_state) {
                          iwqp->iwarp_state = info.next_iwarp_state;
                          iwqp->ibqp_state = attr->qp_state;
                  }
                  spin_unlock_irqrestore(&iwqp->lock, flags);
          }
  
          if (issue_modify_qp && iwqp->ibqp_state > IB_QPS_RTS) {
                  if (dont_wait) {
                          if (iwqp->hw_tcp_state) {
                                  spin_lock_irqsave(&iwqp->lock, flags);
                                  iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED;
                                  iwqp->last_aeq = IRDMA_AE_RESET_SENT;
                                  spin_unlock_irqrestore(&iwqp->lock, flags);
                          }
                          irdma_cm_disconn(iwqp);
                  } else {
                          int close_timer_started;
  
                          spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
  
                          if (iwqp->cm_node) {
                                  atomic_inc(&iwqp->cm_node->refcnt);
                                  spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
                                  close_timer_started = atomic_inc_return(&iwqp->close_timer_started);
                                  if (iwqp->cm_id && close_timer_started == 1)
                                          irdma_schedule_cm_timer(iwqp->cm_node,
                                                                  (struct irdma_puda_buf *)iwqp,
                                                                  IRDMA_TIMER_TYPE_CLOSE, 1, 0);
  
                                  irdma_rem_ref_cm_node(iwqp->cm_node);
                          } else {
                                  spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
                          }
                  }
          }
          if (attr_mask & IB_QP_STATE && udata && udata->outlen &&
              dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
                  struct irdma_ucontext *ucontext;
  
                  ucontext = rdma_udata_to_drv_context(udata,
                                                       struct irdma_ucontext, ibucontext);
                  if (iwqp->sc_qp.push_idx != IRDMA_INVALID_PUSH_PAGE_INDEX &&
                      !iwqp->push_wqe_mmap_entry &&
                      !irdma_setup_push_mmap_entries(ucontext, iwqp,
                                                     &uresp.push_wqe_mmap_key, &uresp.push_db_mmap_key)) {
                          uresp.push_valid = 1;
                          uresp.push_offset = iwqp->sc_qp.push_offset;
                  }
                  uresp.rd_fence_rate = iwdev->rd_fence_rate;
  
                  err = ib_copy_to_udata(udata, &uresp, min(sizeof(uresp),
                                                            udata->outlen));
                  if (err) {
                          irdma_remove_push_mmap_entries(iwqp);
                          irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                                      "copy_to_udata failed\n");
                          return err;
                  }
          }
  
          return 0;
  exit:
          spin_unlock_irqrestore(&iwqp->lock, flags);
  
          return err;
  }
  
  /**
   * irdma_cq_free_rsrc - free up resources for cq
   * @rf: RDMA PCI function
   * @iwcq: cq ptr
   */
  void
  irdma_cq_free_rsrc(struct irdma_pci_f *rf, struct irdma_cq *iwcq)
  {
          struct irdma_sc_cq *cq = &iwcq->sc_cq;
  
          if (!iwcq->user_mode) {
                  irdma_free_dma_mem(rf->sc_dev.hw, &iwcq->kmem);
                  irdma_free_dma_mem(rf->sc_dev.hw, &iwcq->kmem_shadow);
          }
  
          irdma_free_rsrc(rf, rf->allocated_cqs, cq->cq_uk.cq_id);
  }
  
  /**
   * irdma_free_cqbuf - worker to free a cq buffer
   * @work: provides access to the cq buffer to free
   */
  static void
  irdma_free_cqbuf(struct work_struct *work)
  {
          struct irdma_cq_buf *cq_buf = container_of(work, struct irdma_cq_buf, work);
  
          irdma_free_dma_mem(cq_buf->hw, &cq_buf->kmem_buf);
          kfree(cq_buf);
  }
  
  /**
   * irdma_process_resize_list - remove resized cq buffers from the resize_list
   * @iwcq: cq which owns the resize_list
   * @iwdev: irdma device
   * @lcqe_buf: the buffer where the last cqe is received
   */
  int
  irdma_process_resize_list(struct irdma_cq *iwcq,
                            struct irdma_device *iwdev,
                            struct irdma_cq_buf *lcqe_buf)
  {
          struct list_head *tmp_node, *list_node;
          struct irdma_cq_buf *cq_buf;
          int cnt = 0;
  
          list_for_each_safe(list_node, tmp_node, &iwcq->resize_list) {
                  cq_buf = list_entry(list_node, struct irdma_cq_buf, list);
                  if (cq_buf == lcqe_buf)
                          return cnt;
  
                  list_del(&cq_buf->list);
                  queue_work(iwdev->cleanup_wq, &cq_buf->work);
                  cnt++;
          }
  
          return cnt;
  }
  
  /**
   * irdma_resize_cq - resize cq
   * @ibcq: cq to be resized
   * @entries: desired cq size
   * @udata: user data
   */
  static int
  irdma_resize_cq(struct ib_cq *ibcq, int entries,
                  struct ib_udata *udata)
  {
  #define IRDMA_RESIZE_CQ_MIN_REQ_LEN offsetofend(struct irdma_resize_cq_req, user_cq_buffer)
          struct irdma_cq *iwcq = to_iwcq(ibcq);
          struct irdma_sc_dev *dev = iwcq->sc_cq.dev;
          struct irdma_cqp_request *cqp_request;
          struct cqp_cmds_info *cqp_info;
          struct irdma_modify_cq_info *m_info;
          struct irdma_modify_cq_info info = {0};
          struct irdma_dma_mem kmem_buf;
          struct irdma_cq_mr *cqmr_buf;
          struct irdma_pbl *iwpbl_buf;
          struct irdma_device *iwdev;
          struct irdma_pci_f *rf;
          struct irdma_cq_buf *cq_buf = NULL;
          unsigned long flags;
          int ret;
  
          iwdev = to_iwdev(ibcq->device);
          rf = iwdev->rf;
  
          if (!(rf->sc_dev.hw_attrs.uk_attrs.feature_flags &
                IRDMA_FEATURE_CQ_RESIZE))
                  return -EOPNOTSUPP;
  
          if (udata && udata->inlen < IRDMA_RESIZE_CQ_MIN_REQ_LEN)
                  return -EINVAL;
  
          if (entries > rf->max_cqe)
                  return -EINVAL;
  
          if (!iwcq->user_mode) {
                  entries++;
                  if (rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2)
                          entries *= 2;
          }
  
          info.cq_size = max(entries, 4);
  
          if (info.cq_size == iwcq->sc_cq.cq_uk.cq_size - 1)
                  return 0;
  
          if (udata) {
                  struct irdma_resize_cq_req req = {};
                  struct irdma_ucontext *ucontext =
                  rdma_udata_to_drv_context(udata, struct irdma_ucontext,
                                            ibucontext);
  
                  /* CQ resize not supported with legacy GEN_1 libi40iw */
                  if (ucontext->legacy_mode)
                          return -EOPNOTSUPP;
  
                  if (ib_copy_from_udata(&req, udata,
                                         min(sizeof(req), udata->inlen)))
                          return -EINVAL;
  
                  spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
                  iwpbl_buf = irdma_get_pbl((unsigned long)req.user_cq_buffer,
                                            &ucontext->cq_reg_mem_list);
                  spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
  
                  if (!iwpbl_buf)
                          return -ENOMEM;
  
                  cqmr_buf = &iwpbl_buf->cq_mr;
                  if (iwpbl_buf->pbl_allocated) {
                          info.virtual_map = true;
                          info.pbl_chunk_size = 1;
                          info.first_pm_pbl_idx = cqmr_buf->cq_pbl.idx;
                  } else {
                          info.cq_pa = cqmr_buf->cq_pbl.addr;
                  }
          } else {
                  /* Kmode CQ resize */
                  int rsize;
  
                  rsize = info.cq_size * sizeof(struct irdma_cqe);
                  kmem_buf.size = round_up(rsize, 256);
                  kmem_buf.va = irdma_allocate_dma_mem(dev->hw, &kmem_buf,
                                                       kmem_buf.size, 256);
                  if (!kmem_buf.va)
                          return -ENOMEM;
  
                  info.cq_base = kmem_buf.va;
                  info.cq_pa = kmem_buf.pa;
                  cq_buf = kzalloc(sizeof(*cq_buf), GFP_KERNEL);
                  if (!cq_buf) {
                          ret = -ENOMEM;
                          goto error;
                  }
          }
  
          cqp_request = irdma_alloc_and_get_cqp_request(&rf->cqp, true);
          if (!cqp_request) {
                  ret = -ENOMEM;
                  goto error;
          }
  
          info.shadow_read_threshold = iwcq->sc_cq.shadow_read_threshold;
          info.cq_resize = true;
  
          cqp_info = &cqp_request->info;
          m_info = &cqp_info->in.u.cq_modify.info;
          memcpy(m_info, &info, sizeof(*m_info));
  
          cqp_info->cqp_cmd = IRDMA_OP_CQ_MODIFY;
          cqp_info->in.u.cq_modify.cq = &iwcq->sc_cq;
          cqp_info->in.u.cq_modify.scratch = (uintptr_t)cqp_request;
          cqp_info->post_sq = 1;
          ret = irdma_handle_cqp_op(rf, cqp_request);
          irdma_put_cqp_request(&rf->cqp, cqp_request);
          if (ret)
                  goto error;
  
          spin_lock_irqsave(&iwcq->lock, flags);
          if (cq_buf) {
                  cq_buf->kmem_buf = iwcq->kmem;
                  cq_buf->hw = dev->hw;
                  memcpy(&cq_buf->cq_uk, &iwcq->sc_cq.cq_uk, sizeof(cq_buf->cq_uk));
                  INIT_WORK(&cq_buf->work, irdma_free_cqbuf);
                  list_add_tail(&cq_buf->list, &iwcq->resize_list);
                  iwcq->kmem = kmem_buf;
          }
  
          irdma_sc_cq_resize(&iwcq->sc_cq, &info);
          ibcq->cqe = info.cq_size - 1;
          spin_unlock_irqrestore(&iwcq->lock, flags);
  
          return 0;
  error:
          if (!udata)
                  irdma_free_dma_mem(dev->hw, &kmem_buf);
          kfree(cq_buf);
  
          return ret;
  }
  
  /**
   * irdma_get_mr_access - get hw MR access permissions from IB access flags
   * @access: IB access flags
   */
  static inline u16 irdma_get_mr_access(int access){
          u16 hw_access = 0;
  
          hw_access |= (access & IB_ACCESS_LOCAL_WRITE) ?
              IRDMA_ACCESS_FLAGS_LOCALWRITE : 0;
          hw_access |= (access & IB_ACCESS_REMOTE_WRITE) ?
              IRDMA_ACCESS_FLAGS_REMOTEWRITE : 0;
          hw_access |= (access & IB_ACCESS_REMOTE_READ) ?
              IRDMA_ACCESS_FLAGS_REMOTEREAD : 0;
          hw_access |= (access & IB_ACCESS_MW_BIND) ?
              IRDMA_ACCESS_FLAGS_BIND_WINDOW : 0;
          hw_access |= (access & IB_ZERO_BASED) ?
              IRDMA_ACCESS_FLAGS_ZERO_BASED : 0;
          hw_access |= IRDMA_ACCESS_FLAGS_LOCALREAD;
  
          return hw_access;
  }
  
  /**
   * irdma_free_stag - free stag resource
   * @iwdev: irdma device
   * @stag: stag to free
   */
  void
  irdma_free_stag(struct irdma_device *iwdev, u32 stag)
  {
          u32 stag_idx;
  
          stag_idx = (stag & iwdev->rf->mr_stagmask) >> IRDMA_CQPSQ_STAG_IDX_S;
          irdma_free_rsrc(iwdev->rf, iwdev->rf->allocated_mrs, stag_idx);
  }
  
  /**
   * irdma_create_stag - create random stag
   * @iwdev: irdma device
   */
  u32
  irdma_create_stag(struct irdma_device *iwdev)
  {
          u32 stag;
          u32 stag_index = 0;
          u32 next_stag_index;
          u32 driver_key;
          u32 random;
          u8 consumer_key;
          int ret;
  
          get_random_bytes(&random, sizeof(random));
          consumer_key = (u8)random;
  
          driver_key = random & ~iwdev->rf->mr_stagmask;
          next_stag_index = (random & iwdev->rf->mr_stagmask) >> 8;
          next_stag_index %= iwdev->rf->max_mr;
  
          ret = irdma_alloc_rsrc(iwdev->rf, iwdev->rf->allocated_mrs,
                                 iwdev->rf->max_mr, &stag_index,
                                 &next_stag_index);
          if (ret)
                  return 0;
          stag = stag_index << IRDMA_CQPSQ_STAG_IDX_S;
          stag |= driver_key;
          stag += (u32)consumer_key;
  
          return stag;
  }
  
  /**
   * irdma_check_mem_contiguous - check if pbls stored in arr are contiguous
   * @arr: lvl1 pbl array
   * @npages: page count
   * @pg_size: page size
   *
   */
  static bool
  irdma_check_mem_contiguous(u64 *arr, u32 npages, u32 pg_size)
  {
          u32 pg_idx;
  
          for (pg_idx = 0; pg_idx < npages; pg_idx++) {
                  if ((*arr + (pg_size * pg_idx)) != arr[pg_idx])
                          return false;
          }
  
          return true;
  }
  
  /**
   * irdma_check_mr_contiguous - check if MR is physically contiguous
   * @palloc: pbl allocation struct
   * @pg_size: page size
   */
  static bool
  irdma_check_mr_contiguous(struct irdma_pble_alloc *palloc,
                            u32 pg_size)
  {
          struct irdma_pble_level2 *lvl2 = &palloc->level2;
          struct irdma_pble_info *leaf = lvl2->leaf;
          u64 *arr = NULL;
          u64 *start_addr = NULL;
          int i;
          bool ret;
  
          if (palloc->level == PBLE_LEVEL_1) {
                  arr = palloc->level1.addr;
                  ret = irdma_check_mem_contiguous(arr, palloc->total_cnt,
                                                   pg_size);
                  return ret;
          }
  
          start_addr = leaf->addr;
  
          for (i = 0; i < lvl2->leaf_cnt; i++, leaf++) {
                  arr = leaf->addr;
                  if ((*start_addr + (i * pg_size * PBLE_PER_PAGE)) != *arr)
                          return false;
                  ret = irdma_check_mem_contiguous(arr, leaf->cnt, pg_size);
                  if (!ret)
                          return false;
          }
  
          return true;
  }
  
  /**
   * irdma_setup_pbles - copy user pg address to pble's
   * @rf: RDMA PCI function
   * @iwmr: mr pointer for this memory registration
   * @use_pbles: flag if to use pble's
   * @lvl_1_only: request only level 1 pble if true
   */
  static int
  irdma_setup_pbles(struct irdma_pci_f *rf, struct irdma_mr *iwmr,
                    bool use_pbles, bool lvl_1_only)
  {
          struct irdma_pbl *iwpbl = &iwmr->iwpbl;
          struct irdma_pble_alloc *palloc = &iwpbl->pble_alloc;
          struct irdma_pble_info *pinfo;
          u64 *pbl;
          int status;
          enum irdma_pble_level level = PBLE_LEVEL_1;
  
          if (use_pbles) {
                  status = irdma_get_pble(rf->pble_rsrc, palloc, iwmr->page_cnt,
                                          lvl_1_only);
                  if (status)
                          return status;
  
                  iwpbl->pbl_allocated = true;
                  level = palloc->level;
                  pinfo = (level == PBLE_LEVEL_1) ? &palloc->level1 :
                      palloc->level2.leaf;
                  pbl = pinfo->addr;
          } else {
                  pbl = iwmr->pgaddrmem;
          }
  
          irdma_copy_user_pgaddrs(iwmr, pbl, level);
  
          if (use_pbles)
                  iwmr->pgaddrmem[0] = *pbl;
  
          return 0;
  }
  
  /**
   * irdma_handle_q_mem - handle memory for qp and cq
   * @iwdev: irdma device
   * @req: information for q memory management
   * @iwpbl: pble struct
   * @use_pbles: flag to use pble
   */
  static int
  irdma_handle_q_mem(struct irdma_device *iwdev,
                     struct irdma_mem_reg_req *req,
                     struct irdma_pbl *iwpbl, bool use_pbles)
  {
          struct irdma_pble_alloc *palloc = &iwpbl->pble_alloc;
          struct irdma_mr *iwmr = iwpbl->iwmr;
          struct irdma_qp_mr *qpmr = &iwpbl->qp_mr;
          struct irdma_cq_mr *cqmr = &iwpbl->cq_mr;
          struct irdma_hmc_pble *hmc_p;
          u64 *arr = iwmr->pgaddrmem;
          u32 pg_size, total;
          int err = 0;
          bool ret = true;
  
          pg_size = iwmr->page_size;
          err = irdma_setup_pbles(iwdev->rf, iwmr, use_pbles, true);
          if (err)
                  return err;
  
          if (use_pbles)
                  arr = palloc->level1.addr;
  
          switch (iwmr->type) {
          case IRDMA_MEMREG_TYPE_QP:
                  total = req->sq_pages + req->rq_pages;
                  hmc_p = &qpmr->sq_pbl;
                  qpmr->shadow = (dma_addr_t) arr[total];
                  if (use_pbles) {
                          ret = irdma_check_mem_contiguous(arr, req->sq_pages,
                                                           pg_size);
                          if (ret)
                                  ret = irdma_check_mem_contiguous(&arr[req->sq_pages],
                                                                   req->rq_pages,
                                                                   pg_size);
                  }
  
                  if (!ret) {
                          hmc_p->idx = palloc->level1.idx;
                          hmc_p = &qpmr->rq_pbl;
                          hmc_p->idx = palloc->level1.idx + req->sq_pages;
                  } else {
                          hmc_p->addr = arr[0];
                          hmc_p = &qpmr->rq_pbl;
                          hmc_p->addr = arr[req->sq_pages];
                  }
                  break;
          case IRDMA_MEMREG_TYPE_CQ:
                  hmc_p = &cqmr->cq_pbl;
  
                  if (!cqmr->split)
                          cqmr->shadow = (dma_addr_t) arr[req->cq_pages];
  
                  if (use_pbles)
                          ret = irdma_check_mem_contiguous(arr, req->cq_pages,
                                                           pg_size);
  
                  if (!ret)
                          hmc_p->idx = palloc->level1.idx;
                  else
                          hmc_p->addr = arr[0];
                  break;
          default:
                  irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                              "MR type error\n");
                  err = -EINVAL;
          }
  
          if (use_pbles && ret) {
                  irdma_free_pble(iwdev->rf->pble_rsrc, palloc);
                  iwpbl->pbl_allocated = false;
          }
  
          return err;
  }
  
  /**
   * irdma_hw_alloc_mw - create the hw memory window
   * @iwdev: irdma device
   * @iwmr: pointer to memory window info
   */
  int
  irdma_hw_alloc_mw(struct irdma_device *iwdev, struct irdma_mr *iwmr)
  {
          struct irdma_mw_alloc_info *info;
          struct irdma_pd *iwpd = to_iwpd(iwmr->ibmr.pd);
          struct irdma_cqp_request *cqp_request;
          struct cqp_cmds_info *cqp_info;
          int status;
  
          cqp_request = irdma_alloc_and_get_cqp_request(&iwdev->rf->cqp, true);
          if (!cqp_request)
                  return -ENOMEM;
  
          cqp_info = &cqp_request->info;
          info = &cqp_info->in.u.mw_alloc.info;
          memset(info, 0, sizeof(*info));
          if (iwmr->ibmw.type == IB_MW_TYPE_1)
                  info->mw_wide = true;
  
          info->page_size = PAGE_SIZE;
          info->mw_stag_index = iwmr->stag >> IRDMA_CQPSQ_STAG_IDX_S;
          info->pd_id = iwpd->sc_pd.pd_id;
          info->remote_access = true;
          cqp_info->cqp_cmd = IRDMA_OP_MW_ALLOC;
          cqp_info->post_sq = 1;
          cqp_info->in.u.mw_alloc.dev = &iwdev->rf->sc_dev;
          cqp_info->in.u.mw_alloc.scratch = (uintptr_t)cqp_request;
          status = irdma_handle_cqp_op(iwdev->rf, cqp_request);
          irdma_put_cqp_request(&iwdev->rf->cqp, cqp_request);
  
          return status;
  }
  
  /**
   * irdma_dealloc_mw - Dealloc memory window
   * @ibmw: memory window structure.
   */
  static int
  irdma_dealloc_mw(struct ib_mw *ibmw)
  {
          struct ib_pd *ibpd = ibmw->pd;
          struct irdma_pd *iwpd = to_iwpd(ibpd);
          struct irdma_mr *iwmr = to_iwmr((struct ib_mr *)ibmw);
          struct irdma_device *iwdev = to_iwdev(ibmw->device);
          struct irdma_cqp_request *cqp_request;
          struct cqp_cmds_info *cqp_info;
          struct irdma_dealloc_stag_info *info;
  
          cqp_request = irdma_alloc_and_get_cqp_request(&iwdev->rf->cqp, true);
          if (!cqp_request)
                  return -ENOMEM;
  
          cqp_info = &cqp_request->info;
          info = &cqp_info->in.u.dealloc_stag.info;
          memset(info, 0, sizeof(*info));
          info->pd_id = iwpd->sc_pd.pd_id;
          info->stag_idx = RS_64_1(ibmw->rkey, IRDMA_CQPSQ_STAG_IDX_S);
          info->mr = false;
          cqp_info->cqp_cmd = IRDMA_OP_DEALLOC_STAG;
          cqp_info->post_sq = 1;
          cqp_info->in.u.dealloc_stag.dev = &iwdev->rf->sc_dev;
          cqp_info->in.u.dealloc_stag.scratch = (uintptr_t)cqp_request;
          irdma_handle_cqp_op(iwdev->rf, cqp_request);
          irdma_put_cqp_request(&iwdev->rf->cqp, cqp_request);
          irdma_free_stag(iwdev, iwmr->stag);
          kfree(iwmr);
  
          return 0;
  }
  
  /**
   * irdma_hw_alloc_stag - cqp command to allocate stag
   * @iwdev: irdma device
   * @iwmr: irdma mr pointer
   */
  int
  irdma_hw_alloc_stag(struct irdma_device *iwdev,
                      struct irdma_mr *iwmr)
  {
          struct irdma_allocate_stag_info *info;
          struct ib_pd *pd = iwmr->ibmr.pd;
          struct irdma_pd *iwpd = to_iwpd(pd);
          struct irdma_cqp_request *cqp_request;
          struct cqp_cmds_info *cqp_info;
          int status;
  
          cqp_request = irdma_alloc_and_get_cqp_request(&iwdev->rf->cqp, true);
          if (!cqp_request)
                  return -ENOMEM;
  
          cqp_info = &cqp_request->info;
          info = &cqp_info->in.u.alloc_stag.info;
          memset(info, 0, sizeof(*info));
          info->page_size = PAGE_SIZE;
          info->stag_idx = iwmr->stag >> IRDMA_CQPSQ_STAG_IDX_S;
          info->pd_id = iwpd->sc_pd.pd_id;
          info->total_len = iwmr->len;
          info->all_memory = (pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) ? true : false;
          info->remote_access = true;
          cqp_info->cqp_cmd = IRDMA_OP_ALLOC_STAG;
          cqp_info->post_sq = 1;
          cqp_info->in.u.alloc_stag.dev = &iwdev->rf->sc_dev;
          cqp_info->in.u.alloc_stag.scratch = (uintptr_t)cqp_request;
          status = irdma_handle_cqp_op(iwdev->rf, cqp_request);
          irdma_put_cqp_request(&iwdev->rf->cqp, cqp_request);
          if (!status)
                  iwmr->is_hwreg = 1;
  
          return status;
  }
  
  /**
   * irdma_set_page - populate pbl list for fmr
   * @ibmr: ib mem to access iwarp mr pointer
   * @addr: page dma address fro pbl list
   */
  static int
  irdma_set_page(struct ib_mr *ibmr, u64 addr)
  {
          struct irdma_mr *iwmr = to_iwmr(ibmr);
          struct irdma_pbl *iwpbl = &iwmr->iwpbl;
          struct irdma_pble_alloc *palloc = &iwpbl->pble_alloc;
          u64 *pbl;
  
          if (unlikely(iwmr->npages == iwmr->page_cnt))
                  return -ENOMEM;
  
          if (palloc->level == PBLE_LEVEL_2) {
                  struct irdma_pble_info *palloc_info =
                  palloc->level2.leaf + (iwmr->npages >> PBLE_512_SHIFT);
  
                  palloc_info->addr[iwmr->npages & (PBLE_PER_PAGE - 1)] = addr;
          } else {
                  pbl = palloc->level1.addr;
                  pbl[iwmr->npages] = addr;
          }
  
          iwmr->npages++;
          return 0;
  }
  
  /**
   * irdma_map_mr_sg - map of sg list for fmr
   * @ibmr: ib mem to access iwarp mr pointer
   * @sg: scatter gather list
   * @sg_nents: number of sg pages
   * @sg_offset: scatter gather list for fmr
   */
  static int
  irdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
                  int sg_nents, unsigned int *sg_offset)
  {
          struct irdma_mr *iwmr = to_iwmr(ibmr);
  
          iwmr->npages = 0;
  
          return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, irdma_set_page);
  }
  
  /**
   * irdma_hwreg_mr - send cqp command for memory registration
   * @iwdev: irdma device
   * @iwmr: irdma mr pointer
   * @access: access for MR
   */
  int
  irdma_hwreg_mr(struct irdma_device *iwdev, struct irdma_mr *iwmr,
                 u16 access)
  {
          struct irdma_pbl *iwpbl = &iwmr->iwpbl;
          struct irdma_reg_ns_stag_info *stag_info;
          struct ib_pd *pd = iwmr->ibmr.pd;
          struct irdma_pd *iwpd = to_iwpd(pd);
          struct irdma_pble_alloc *palloc = &iwpbl->pble_alloc;
          struct irdma_cqp_request *cqp_request;
          struct cqp_cmds_info *cqp_info;
          int ret;
  
          cqp_request = irdma_alloc_and_get_cqp_request(&iwdev->rf->cqp, true);
          if (!cqp_request)
                  return -ENOMEM;
  
          cqp_info = &cqp_request->info;
          stag_info = &cqp_info->in.u.mr_reg_non_shared.info;
          memset(stag_info, 0, sizeof(*stag_info));
          stag_info->va = iwpbl->user_base;
          stag_info->stag_idx = iwmr->stag >> IRDMA_CQPSQ_STAG_IDX_S;
          stag_info->stag_key = (u8)iwmr->stag;
          stag_info->total_len = iwmr->len;
          stag_info->all_memory = (pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) ? true : false;
          stag_info->access_rights = irdma_get_mr_access(access);
          stag_info->pd_id = iwpd->sc_pd.pd_id;
          if (stag_info->access_rights & IRDMA_ACCESS_FLAGS_ZERO_BASED)
                  stag_info->addr_type = IRDMA_ADDR_TYPE_ZERO_BASED;
          else
                  stag_info->addr_type = IRDMA_ADDR_TYPE_VA_BASED;
          stag_info->page_size = iwmr->page_size;
  
          if (iwpbl->pbl_allocated) {
                  if (palloc->level == PBLE_LEVEL_1) {
                          stag_info->first_pm_pbl_index = palloc->level1.idx;
                          stag_info->chunk_size = 1;
                  } else {
                          stag_info->first_pm_pbl_index = palloc->level2.root.idx;
                          stag_info->chunk_size = 3;
                  }
          } else {
                  stag_info->reg_addr_pa = iwmr->pgaddrmem[0];
          }
  
          cqp_info->cqp_cmd = IRDMA_OP_MR_REG_NON_SHARED;
          cqp_info->post_sq = 1;
          cqp_info->in.u.mr_reg_non_shared.dev = &iwdev->rf->sc_dev;
          cqp_info->in.u.mr_reg_non_shared.scratch = (uintptr_t)cqp_request;
          ret = irdma_handle_cqp_op(iwdev->rf, cqp_request);
          irdma_put_cqp_request(&iwdev->rf->cqp, cqp_request);
  
          if (!ret)
                  iwmr->is_hwreg = 1;
  
          return ret;
  }
  
  /**
   * irdma_reg_user_mr - Register a user memory region
   * @pd: ptr of pd
   * @start: virtual start address
   * @len: length of mr
   * @virt: virtual address
   * @access: access of mr
   * @udata: user data
   */
  static struct ib_mr *
  irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len,
                    u64 virt, int access,
                    struct ib_udata *udata)
  {
  #define IRDMA_MEM_REG_MIN_REQ_LEN offsetofend(struct irdma_mem_reg_req, sq_pages)
          struct irdma_device *iwdev = to_iwdev(pd->device);
          struct irdma_ucontext *ucontext;
          struct irdma_pble_alloc *palloc;
          struct irdma_pbl *iwpbl;
          struct irdma_mr *iwmr;
          struct ib_umem *region;
          struct irdma_mem_reg_req req = {};
          u32 total, stag = 0;
          u8 shadow_pgcnt = 1;
          bool use_pbles = false;
          unsigned long flags;
          int err = -EINVAL;
          int ret;
  
          if (len > iwdev->rf->sc_dev.hw_attrs.max_mr_size)
                  return ERR_PTR(-EINVAL);
  
          if (udata->inlen < IRDMA_MEM_REG_MIN_REQ_LEN)
                  return ERR_PTR(-EINVAL);
  
          region = ib_umem_get(pd->uobject->context, start, len, access, 0);
  
          if (IS_ERR(region)) {
                  irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                              "Failed to create ib_umem region\n");
                  return (struct ib_mr *)region;
          }
  
          if (ib_copy_from_udata(&req, udata, min(sizeof(req), udata->inlen))) {
                  ib_umem_release(region);
                  return ERR_PTR(-EFAULT);
          }
  
          iwmr = kzalloc(sizeof(*iwmr), GFP_KERNEL);
          if (!iwmr) {
                  ib_umem_release(region);
                  return ERR_PTR(-ENOMEM);
          }
  
          iwpbl = &iwmr->iwpbl;
          iwpbl->iwmr = iwmr;
          iwmr->region = region;
          iwmr->ibmr.pd = pd;
          iwmr->ibmr.device = pd->device;
          iwmr->ibmr.iova = virt;
          iwmr->page_size = IRDMA_HW_PAGE_SIZE;
          iwmr->page_msk = ~(IRDMA_HW_PAGE_SIZE - 1);
  
          iwmr->len = region->length;
          iwpbl->user_base = virt;
          palloc = &iwpbl->pble_alloc;
          iwmr->type = req.reg_type;
          iwmr->page_cnt = irdma_ib_umem_num_dma_blocks(region, iwmr->page_size, virt);
  
          switch (req.reg_type) {
          case IRDMA_MEMREG_TYPE_QP:
                  total = req.sq_pages + req.rq_pages + shadow_pgcnt;
                  if (total > iwmr->page_cnt) {
                          err = -EINVAL;
                          goto error;
                  }
                  total = req.sq_pages + req.rq_pages;
                  use_pbles = (total > 2);
                  err = irdma_handle_q_mem(iwdev, &req, iwpbl, use_pbles);
                  if (err)
                          goto error;
  
                  ucontext = rdma_udata_to_drv_context(udata, struct irdma_ucontext,
                                                       ibucontext);
                  spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
                  list_add_tail(&iwpbl->list, &ucontext->qp_reg_mem_list);
                  iwpbl->on_list = true;
                  spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
                  break;
          case IRDMA_MEMREG_TYPE_CQ:
                  if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_CQ_RESIZE)
                          shadow_pgcnt = 0;
                  total = req.cq_pages + shadow_pgcnt;
                  if (total > iwmr->page_cnt) {
                          err = -EINVAL;
                          goto error;
                  }
  
                  use_pbles = (req.cq_pages > 1);
                  err = irdma_handle_q_mem(iwdev, &req, iwpbl, use_pbles);
                  if (err)
                          goto error;
  
                  ucontext = rdma_udata_to_drv_context(udata, struct irdma_ucontext,
                                                       ibucontext);
                  spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
                  list_add_tail(&iwpbl->list, &ucontext->cq_reg_mem_list);
                  iwpbl->on_list = true;
                  spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
                  break;
          case IRDMA_MEMREG_TYPE_MEM:
                  use_pbles = (iwmr->page_cnt != 1);
  
                  err = irdma_setup_pbles(iwdev->rf, iwmr, use_pbles, false);
                  if (err)
                          goto error;
  
                  if (use_pbles) {
                          ret = irdma_check_mr_contiguous(palloc,
                                                          iwmr->page_size);
                          if (ret) {
                                  irdma_free_pble(iwdev->rf->pble_rsrc, palloc);
                                  iwpbl->pbl_allocated = false;
                          }
                  }
  
                  stag = irdma_create_stag(iwdev);
                  if (!stag) {
                          err = -ENOMEM;
                          goto error;
                  }
  
                  iwmr->stag = stag;
                  iwmr->ibmr.rkey = stag;
                  iwmr->ibmr.lkey = stag;
                  iwmr->access = access;
                  err = irdma_hwreg_mr(iwdev, iwmr, access);
                  if (err) {
                          irdma_free_stag(iwdev, stag);
                          goto error;
                  }
  
                  break;
          default:
                  goto error;
          }
  
          iwmr->type = req.reg_type;
  
          return &iwmr->ibmr;
  
  error:
          if (palloc->level != PBLE_LEVEL_0 && iwpbl->pbl_allocated)
                  irdma_free_pble(iwdev->rf->pble_rsrc, palloc);
          ib_umem_release(region);
          kfree(iwmr);
  
          return ERR_PTR(err);
  }
  
  int
  irdma_hwdereg_mr(struct ib_mr *ib_mr)
  {
          struct irdma_device *iwdev = to_iwdev(ib_mr->device);
          struct irdma_mr *iwmr = to_iwmr(ib_mr);
          struct irdma_pd *iwpd = to_iwpd(ib_mr->pd);
          struct irdma_dealloc_stag_info *info;
          struct irdma_pbl *iwpbl = &iwmr->iwpbl;
          struct irdma_cqp_request *cqp_request;
          struct cqp_cmds_info *cqp_info;
          int status;
  
          /*
           * Skip HW MR de-register when it is already de-registered during an MR re-reregister and the re-registration
           * fails
           */
          if (!iwmr->is_hwreg)
                  return 0;
  
          cqp_request = irdma_alloc_and_get_cqp_request(&iwdev->rf->cqp, true);
          if (!cqp_request)
                  return -ENOMEM;
  
          cqp_info = &cqp_request->info;
          info = &cqp_info->in.u.dealloc_stag.info;
          memset(info, 0, sizeof(*info));
          info->pd_id = iwpd->sc_pd.pd_id;
          info->stag_idx = RS_64_1(ib_mr->rkey, IRDMA_CQPSQ_STAG_IDX_S);
          info->mr = true;
          if (iwpbl->pbl_allocated)
                  info->dealloc_pbl = true;
  
          cqp_info->cqp_cmd = IRDMA_OP_DEALLOC_STAG;
          cqp_info->post_sq = 1;
          cqp_info->in.u.dealloc_stag.dev = &iwdev->rf->sc_dev;
          cqp_info->in.u.dealloc_stag.scratch = (uintptr_t)cqp_request;
          status = irdma_handle_cqp_op(iwdev->rf, cqp_request);
          irdma_put_cqp_request(&iwdev->rf->cqp, cqp_request);
  
          if (!status)
                  iwmr->is_hwreg = 0;
  
          return status;
  }
  
  /*
   * irdma_rereg_mr_trans - Re-register a user MR for a change translation. @iwmr: ptr of iwmr @start: virtual start
   * address @len: length of mr @virt: virtual address
   *
   * Re-register a user memory region when a change translation is requested. Re-register a new region while reusing the
   * stag from the original registration.
   */
  struct ib_mr *
  irdma_rereg_mr_trans(struct irdma_mr *iwmr, u64 start, u64 len,
                       u64 virt, struct ib_udata *udata)
  {
          struct irdma_device *iwdev = to_iwdev(iwmr->ibmr.device);
          struct irdma_pbl *iwpbl = &iwmr->iwpbl;
          struct irdma_pble_alloc *palloc = &iwpbl->pble_alloc;
          struct ib_pd *pd = iwmr->ibmr.pd;
          struct ib_umem *region;
          bool use_pbles;
          int err;
  
          region = ib_umem_get(pd->uobject->context, start, len, iwmr->access, 0);
  
          if (IS_ERR(region)) {
                  irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                              "Failed to create ib_umem region\n");
                  return (struct ib_mr *)region;
          }
  
          iwmr->region = region;
          iwmr->ibmr.iova = virt;
          iwmr->ibmr.pd = pd;
          iwmr->page_size = PAGE_SIZE;
  
          iwmr->len = region->length;
          iwpbl->user_base = virt;
          iwmr->page_cnt = irdma_ib_umem_num_dma_blocks(region, iwmr->page_size,
                                                        virt);
  
          use_pbles = (iwmr->page_cnt != 1);
  
          err = irdma_setup_pbles(iwdev->rf, iwmr, use_pbles, false);
          if (err)
                  goto error;
  
          if (use_pbles) {
                  err = irdma_check_mr_contiguous(palloc,
                                                  iwmr->page_size);
                  if (err) {
                          irdma_free_pble(iwdev->rf->pble_rsrc, palloc);
                          iwpbl->pbl_allocated = false;
                  }
          }
  
          err = irdma_hwreg_mr(iwdev, iwmr, iwmr->access);
          if (err)
                  goto error;
  
          return &iwmr->ibmr;
  
  error:
          if (palloc->level != PBLE_LEVEL_0 && iwpbl->pbl_allocated) {
                  irdma_free_pble(iwdev->rf->pble_rsrc, palloc);
                  iwpbl->pbl_allocated = false;
          }
          ib_umem_release(region);
          iwmr->region = NULL;
  
          return ERR_PTR(err);
  }
  
  /**
   * irdma_reg_phys_mr - register kernel physical memory
   * @pd: ibpd pointer
   * @addr: physical address of memory to register
   * @size: size of memory to register
   * @access: Access rights
   * @iova_start: start of virtual address for physical buffers
   */
  struct ib_mr *
  irdma_reg_phys_mr(struct ib_pd *pd, u64 addr, u64 size, int access,
                    u64 *iova_start)
  {
          struct irdma_device *iwdev = to_iwdev(pd->device);
          struct irdma_pbl *iwpbl;
          struct irdma_mr *iwmr;
          u32 stag;
          int ret;
  
          iwmr = kzalloc(sizeof(*iwmr), GFP_KERNEL);
          if (!iwmr)
                  return ERR_PTR(-ENOMEM);
  
          iwmr->ibmr.pd = pd;
          iwmr->ibmr.device = pd->device;
          iwpbl = &iwmr->iwpbl;
          iwpbl->iwmr = iwmr;
          iwmr->type = IRDMA_MEMREG_TYPE_MEM;
          iwpbl->user_base = *iova_start;
          stag = irdma_create_stag(iwdev);
          if (!stag) {
                  ret = -ENOMEM;
                  goto err;
          }
  
          iwmr->stag = stag;
          iwmr->ibmr.iova = *iova_start;
          iwmr->ibmr.rkey = stag;
          iwmr->ibmr.lkey = stag;
          iwmr->page_cnt = 1;
          iwmr->pgaddrmem[0] = addr;
          iwmr->len = size;
          iwmr->page_size = SZ_4K;
          ret = irdma_hwreg_mr(iwdev, iwmr, access);
          if (ret) {
                  irdma_free_stag(iwdev, stag);
                  goto err;
          }
  
          return &iwmr->ibmr;
  
  err:
          kfree(iwmr);
  
          return ERR_PTR(ret);
  }
  
  /**
   * irdma_get_dma_mr - register physical mem
   * @pd: ptr of pd
   * @acc: access for memory
   */
  static struct ib_mr *
  irdma_get_dma_mr(struct ib_pd *pd, int acc)
  {
          u64 kva = 0;
  
          return irdma_reg_phys_mr(pd, 0, 0, acc, &kva);
  }
  
  /**
   * irdma_del_memlist - Deleting pbl list entries for CQ/QP
   * @iwmr: iwmr for IB's user page addresses
   * @ucontext: ptr to user context
   */
  void
  irdma_del_memlist(struct irdma_mr *iwmr,
                    struct irdma_ucontext *ucontext)
  {
          struct irdma_pbl *iwpbl = &iwmr->iwpbl;
          unsigned long flags;
  
          switch (iwmr->type) {
          case IRDMA_MEMREG_TYPE_CQ:
                  spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
                  if (iwpbl->on_list) {
                          iwpbl->on_list = false;
                          list_del(&iwpbl->list);
                  }
                  spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
                  break;
          case IRDMA_MEMREG_TYPE_QP:
                  spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
                  if (iwpbl->on_list) {
                          iwpbl->on_list = false;
                          list_del(&iwpbl->list);
                  }
                  spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
                  break;
          default:
                  break;
          }
  }
  
  /**
   * irdma_copy_sg_list - copy sg list for qp
   * @sg_list: copied into sg_list
   * @sgl: copy from sgl
   * @num_sges: count of sg entries
   */
  static void
  irdma_copy_sg_list(struct irdma_sge *sg_list, struct ib_sge *sgl,
                     int num_sges)
  {
          unsigned int i;
  
          for (i = 0; i < num_sges; i++) {
                  sg_list[i].tag_off = sgl[i].addr;
                  sg_list[i].len = sgl[i].length;
                  sg_list[i].stag = sgl[i].lkey;
          }
  }
  
  /**
   * irdma_post_send -  kernel application wr
   * @ibqp: qp ptr for wr
   * @ib_wr: work request ptr
   * @bad_wr: return of bad wr if err
   */
  static int
  irdma_post_send(struct ib_qp *ibqp,
                  const struct ib_send_wr *ib_wr,
                  const struct ib_send_wr **bad_wr)
  {
          struct irdma_qp *iwqp;
          struct irdma_qp_uk *ukqp;
          struct irdma_sc_dev *dev;
          struct irdma_post_sq_info info;
          int err = 0;
          unsigned long flags;
          bool inv_stag;
          struct irdma_ah *ah;
  
          iwqp = to_iwqp(ibqp);
          ukqp = &iwqp->sc_qp.qp_uk;
          dev = &iwqp->iwdev->rf->sc_dev;
  
          spin_lock_irqsave(&iwqp->lock, flags);
          while (ib_wr) {
                  memset(&info, 0, sizeof(info));
                  inv_stag = false;
                  info.wr_id = (ib_wr->wr_id);
                  if ((ib_wr->send_flags & IB_SEND_SIGNALED) || iwqp->sig_all)
                          info.signaled = true;
                  if (ib_wr->send_flags & IB_SEND_FENCE)
                          info.read_fence = true;
                  switch (ib_wr->opcode) {
                  case IB_WR_SEND_WITH_IMM:
                          if (ukqp->qp_caps & IRDMA_SEND_WITH_IMM) {
                                  info.imm_data_valid = true;
                                  info.imm_data = ntohl(ib_wr->ex.imm_data);
                          } else {
                                  err = -EINVAL;
                                  break;
                          }
                          /* fallthrough */
                  case IB_WR_SEND:
                  case IB_WR_SEND_WITH_INV:
                          if (ib_wr->opcode == IB_WR_SEND ||
                              ib_wr->opcode == IB_WR_SEND_WITH_IMM) {
                                  if (ib_wr->send_flags & IB_SEND_SOLICITED)
                                          info.op_type = IRDMA_OP_TYPE_SEND_SOL;
                                  else
                                          info.op_type = IRDMA_OP_TYPE_SEND;
                          } else {
                                  if (ib_wr->send_flags & IB_SEND_SOLICITED)
                                          info.op_type = IRDMA_OP_TYPE_SEND_SOL_INV;
                                  else
                                          info.op_type = IRDMA_OP_TYPE_SEND_INV;
                                  info.stag_to_inv = ib_wr->ex.invalidate_rkey;
                          }
  
                          info.op.send.num_sges = ib_wr->num_sge;
                          info.op.send.sg_list = (struct irdma_sge *)ib_wr->sg_list;
                          if (iwqp->ibqp.qp_type == IB_QPT_UD ||
                              iwqp->ibqp.qp_type == IB_QPT_GSI) {
                                  ah = to_iwah(ud_wr(ib_wr)->ah);
                                  info.op.send.ah_id = ah->sc_ah.ah_info.ah_idx;
                                  info.op.send.qkey = ud_wr(ib_wr)->remote_qkey;
                                  info.op.send.dest_qp = ud_wr(ib_wr)->remote_qpn;
                          }
  
                          if (ib_wr->send_flags & IB_SEND_INLINE)
                                  err = irdma_uk_inline_send(ukqp, &info, false);
                          else
                                  err = irdma_uk_send(ukqp, &info, false);
                          break;
                  case IB_WR_RDMA_WRITE_WITH_IMM:
                          if (ukqp->qp_caps & IRDMA_WRITE_WITH_IMM) {
                                  info.imm_data_valid = true;
                                  info.imm_data = ntohl(ib_wr->ex.imm_data);
                          } else {
                                  err = -EINVAL;
                                  break;
                          }
                          /* fallthrough */
                  case IB_WR_RDMA_WRITE:
                          if (ib_wr->send_flags & IB_SEND_SOLICITED)
                                  info.op_type = IRDMA_OP_TYPE_RDMA_WRITE_SOL;
                          else
                                  info.op_type = IRDMA_OP_TYPE_RDMA_WRITE;
  
                          info.op.rdma_write.num_lo_sges = ib_wr->num_sge;
                          info.op.rdma_write.lo_sg_list = (void *)ib_wr->sg_list;
                          info.op.rdma_write.rem_addr.tag_off = rdma_wr(ib_wr)->remote_addr;
                          info.op.rdma_write.rem_addr.stag = rdma_wr(ib_wr)->rkey;
                          if (ib_wr->send_flags & IB_SEND_INLINE)
                                  err = irdma_uk_inline_rdma_write(ukqp, &info, false);
                          else
                                  err = irdma_uk_rdma_write(ukqp, &info, false);
                          break;
                  case IB_WR_RDMA_READ_WITH_INV:
                          inv_stag = true;
                          /* fallthrough */
                  case IB_WR_RDMA_READ:
                          if (ib_wr->num_sge >
                              dev->hw_attrs.uk_attrs.max_hw_read_sges) {
                                  err = -EINVAL;
                                  break;
                          }
                          info.op_type = IRDMA_OP_TYPE_RDMA_READ;
                          info.op.rdma_read.rem_addr.tag_off = rdma_wr(ib_wr)->remote_addr;
                          info.op.rdma_read.rem_addr.stag = rdma_wr(ib_wr)->rkey;
                          info.op.rdma_read.lo_sg_list = (void *)ib_wr->sg_list;
                          info.op.rdma_read.num_lo_sges = ib_wr->num_sge;
                          err = irdma_uk_rdma_read(ukqp, &info, inv_stag, false);
                          break;
                  case IB_WR_LOCAL_INV:
                          info.op_type = IRDMA_OP_TYPE_INV_STAG;
                          info.op.inv_local_stag.target_stag = ib_wr->ex.invalidate_rkey;
                          err = irdma_uk_stag_local_invalidate(ukqp, &info, true);
                          break;
                  case IB_WR_REG_MR:{
                                  struct irdma_mr *iwmr = to_iwmr(reg_wr(ib_wr)->mr);
                                  struct irdma_pble_alloc *palloc = &iwmr->iwpbl.pble_alloc;
                                  struct irdma_fast_reg_stag_info stag_info = {0};
  
                                  stag_info.signaled = info.signaled;
                                  stag_info.read_fence = info.read_fence;
                                  stag_info.access_rights = irdma_get_mr_access(reg_wr(ib_wr)->access);
                                  stag_info.stag_key = reg_wr(ib_wr)->key & 0xff;
                                  stag_info.stag_idx = reg_wr(ib_wr)->key >> 8;
                                  stag_info.page_size = reg_wr(ib_wr)->mr->page_size;
                                  stag_info.wr_id = ib_wr->wr_id;
                                  stag_info.addr_type = IRDMA_ADDR_TYPE_VA_BASED;
                                  stag_info.va = (void *)(uintptr_t)iwmr->ibmr.iova;
                                  stag_info.total_len = iwmr->ibmr.length;
                                  if (palloc->level == PBLE_LEVEL_2) {
                                          stag_info.chunk_size = 3;
                                          stag_info.first_pm_pbl_index = palloc->level2.root.idx;
                                  } else {
                                          stag_info.chunk_size = 1;
                                          stag_info.first_pm_pbl_index = palloc->level1.idx;
                                  }
                                  stag_info.local_fence = ib_wr->send_flags & IB_SEND_FENCE;
                                  err = irdma_sc_mr_fast_register(&iwqp->sc_qp, &stag_info,
                                                                  true);
                                  break;
                          }
                  default:
                          err = -EINVAL;
                          irdma_debug(iwdev_to_idev(iwqp->iwdev),
                                      IRDMA_DEBUG_VERBS,
                                      "upost_send bad opcode = 0x%x\n",
                                      ib_wr->opcode);
                          break;
                  }
  
                  if (err)
                          break;
                  ib_wr = ib_wr->next;
          }
  
          if (!iwqp->flush_issued) {
                  if (iwqp->hw_iwarp_state <= IRDMA_QP_STATE_RTS)
                          irdma_uk_qp_post_wr(ukqp);
                  spin_unlock_irqrestore(&iwqp->lock, flags);
          } else {
                  spin_unlock_irqrestore(&iwqp->lock, flags);
                  irdma_sched_qp_flush_work(iwqp);
          }
          if (err)
                  *bad_wr = ib_wr;
  
          return err;
  }
  
  /**
   * irdma_post_recv - post receive wr for kernel application
   * @ibqp: ib qp pointer
   * @ib_wr: work request for receive
   * @bad_wr: bad wr caused an error
   */
  static int
  irdma_post_recv(struct ib_qp *ibqp,
                  const struct ib_recv_wr *ib_wr,
                  const struct ib_recv_wr **bad_wr)
  {
          struct irdma_qp *iwqp = to_iwqp(ibqp);
          struct irdma_qp_uk *ukqp = &iwqp->sc_qp.qp_uk;
          struct irdma_post_rq_info post_recv = {0};
          struct irdma_sge *sg_list = iwqp->sg_list;
          unsigned long flags;
          int err = 0;
  
          spin_lock_irqsave(&iwqp->lock, flags);
  
          while (ib_wr) {
                  if (ib_wr->num_sge > ukqp->max_rq_frag_cnt) {
                          err = -EINVAL;
                          goto out;
                  }
                  post_recv.num_sges = ib_wr->num_sge;
                  post_recv.wr_id = ib_wr->wr_id;
                  irdma_copy_sg_list(sg_list, ib_wr->sg_list, ib_wr->num_sge);
                  post_recv.sg_list = sg_list;
                  err = irdma_uk_post_receive(ukqp, &post_recv);
                  if (err) {
                          irdma_debug(iwdev_to_idev(iwqp->iwdev),
                                      IRDMA_DEBUG_VERBS, "post_recv err %d\n",
                                      err);
                          goto out;
                  }
  
                  ib_wr = ib_wr->next;
          }
  
  out:
          spin_unlock_irqrestore(&iwqp->lock, flags);
          if (iwqp->flush_issued)
                  irdma_sched_qp_flush_work(iwqp);
          if (err)
                  *bad_wr = ib_wr;
  
          return err;
  }
  
  /**
   * irdma_flush_err_to_ib_wc_status - return change flush error code to IB status
   * @opcode: iwarp flush code
   */
  static enum ib_wc_status
  irdma_flush_err_to_ib_wc_status(enum irdma_flush_opcode opcode)
  {
          switch (opcode) {
          case FLUSH_PROT_ERR:
                  return IB_WC_LOC_PROT_ERR;
          case FLUSH_REM_ACCESS_ERR:
                  return IB_WC_REM_ACCESS_ERR;
          case FLUSH_LOC_QP_OP_ERR:
                  return IB_WC_LOC_QP_OP_ERR;
          case FLUSH_REM_OP_ERR:
                  return IB_WC_REM_OP_ERR;
          case FLUSH_LOC_LEN_ERR:
                  return IB_WC_LOC_LEN_ERR;
          case FLUSH_GENERAL_ERR:
                  return IB_WC_WR_FLUSH_ERR;
          case FLUSH_MW_BIND_ERR:
                  return IB_WC_MW_BIND_ERR;
          case FLUSH_REM_INV_REQ_ERR:
                  return IB_WC_REM_INV_REQ_ERR;
          case FLUSH_RETRY_EXC_ERR:
                  return IB_WC_RETRY_EXC_ERR;
          case FLUSH_FATAL_ERR:
          default:
                  return IB_WC_FATAL_ERR;
          }
  }
  
  static inline void
  set_ib_wc_op_sq(struct irdma_cq_poll_info *cq_poll_info,
                  struct ib_wc *entry)
  {
          struct irdma_sc_qp *qp;
  
          switch (cq_poll_info->op_type) {
          case IRDMA_OP_TYPE_RDMA_WRITE:
          case IRDMA_OP_TYPE_RDMA_WRITE_SOL:
                  entry->opcode = IB_WC_RDMA_WRITE;
                  break;
          case IRDMA_OP_TYPE_RDMA_READ_INV_STAG:
          case IRDMA_OP_TYPE_RDMA_READ:
                  entry->opcode = IB_WC_RDMA_READ;
                  break;
          case IRDMA_OP_TYPE_SEND_SOL:
          case IRDMA_OP_TYPE_SEND_SOL_INV:
          case IRDMA_OP_TYPE_SEND_INV:
          case IRDMA_OP_TYPE_SEND:
                  entry->opcode = IB_WC_SEND;
                  break;
          case IRDMA_OP_TYPE_FAST_REG_NSMR:
                  entry->opcode = IB_WC_REG_MR;
                  break;
          case IRDMA_OP_TYPE_INV_STAG:
                  entry->opcode = IB_WC_LOCAL_INV;
                  break;
          default:
                  qp = cq_poll_info->qp_handle;
                  ibdev_err(irdma_get_ibdev(qp->dev), "Invalid opcode = %d in CQE\n",
                            cq_poll_info->op_type);
                  entry->status = IB_WC_GENERAL_ERR;
          }
  }
  
  static inline void
  set_ib_wc_op_rq(struct irdma_cq_poll_info *cq_poll_info,
                  struct ib_wc *entry, bool send_imm_support)
  {
          /**
           * iWARP does not support sendImm, so the presence of Imm data
           * must be WriteImm.
           */
          if (!send_imm_support) {
                  entry->opcode = cq_poll_info->imm_valid ?
                      IB_WC_RECV_RDMA_WITH_IMM : IB_WC_RECV;
                  return;
          }
          switch (cq_poll_info->op_type) {
          case IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE:
          case IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE:
                  entry->opcode = IB_WC_RECV_RDMA_WITH_IMM;
                  break;
          default:
                  entry->opcode = IB_WC_RECV;
          }
  }
  
  /**
   * irdma_process_cqe - process cqe info
   * @entry: processed cqe
   * @cq_poll_info: cqe info
   */
  static void
  irdma_process_cqe(struct ib_wc *entry,
                    struct irdma_cq_poll_info *cq_poll_info)
  {
          struct irdma_sc_qp *qp;
  
          entry->wc_flags = 0;
          entry->pkey_index = 0;
          entry->wr_id = cq_poll_info->wr_id;
  
          qp = cq_poll_info->qp_handle;
          entry->qp = qp->qp_uk.back_qp;
  
          if (cq_poll_info->error) {
                  entry->status = (cq_poll_info->comp_status == IRDMA_COMPL_STATUS_FLUSHED) ?
                      irdma_flush_err_to_ib_wc_status(cq_poll_info->minor_err) : IB_WC_GENERAL_ERR;
  
                  entry->vendor_err = cq_poll_info->major_err << 16 |
                      cq_poll_info->minor_err;
          } else {
                  entry->status = IB_WC_SUCCESS;
                  if (cq_poll_info->imm_valid) {
                          entry->ex.imm_data = htonl(cq_poll_info->imm_data);
                          entry->wc_flags |= IB_WC_WITH_IMM;
                  }
                  if (cq_poll_info->ud_smac_valid) {
                          ether_addr_copy(entry->smac, cq_poll_info->ud_smac);
                          entry->wc_flags |= IB_WC_WITH_SMAC;
                  }
  
                  if (cq_poll_info->ud_vlan_valid) {
                          u16 vlan = cq_poll_info->ud_vlan & EVL_VLID_MASK;
  
                          entry->sl = cq_poll_info->ud_vlan >> VLAN_PRIO_SHIFT;
                          if (vlan) {
                                  entry->vlan_id = vlan;
                                  entry->wc_flags |= IB_WC_WITH_VLAN;
                          }
                  } else {
                          entry->sl = 0;
                  }
          }
  
          if (cq_poll_info->q_type == IRDMA_CQE_QTYPE_SQ) {
                  set_ib_wc_op_sq(cq_poll_info, entry);
          } else {
                  set_ib_wc_op_rq(cq_poll_info, entry,
                                  qp->qp_uk.qp_caps & IRDMA_SEND_WITH_IMM ?
                                  true : false);
                  if (qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_UD &&
                      cq_poll_info->stag_invalid_set) {
                          entry->ex.invalidate_rkey = cq_poll_info->inv_stag;
                          entry->wc_flags |= IB_WC_WITH_INVALIDATE;
                  }
          }
  
          if (qp->qp_uk.qp_type == IRDMA_QP_TYPE_ROCE_UD) {
                  entry->src_qp = cq_poll_info->ud_src_qpn;
                  entry->slid = 0;
                  entry->wc_flags |=
                      (IB_WC_GRH | IB_WC_WITH_NETWORK_HDR_TYPE);
                  entry->network_hdr_type = cq_poll_info->ipv4 ?
                      RDMA_NETWORK_IPV4 :
                      RDMA_NETWORK_IPV6;
          } else {
                  entry->src_qp = cq_poll_info->qp_id;
          }
  
          entry->byte_len = cq_poll_info->bytes_xfered;
  }
  
  /**
   * irdma_poll_one - poll one entry of the CQ
   * @ukcq: ukcq to poll
   * @cur_cqe: current CQE info to be filled in
   * @entry: ibv_wc object to be filled for non-extended CQ or NULL for extended CQ
   *
   * Returns the internal irdma device error code or 0 on success
   */
  static inline int
  irdma_poll_one(struct irdma_cq_uk *ukcq,
                 struct irdma_cq_poll_info *cur_cqe,
                 struct ib_wc *entry)
  {
          int ret = irdma_uk_cq_poll_cmpl(ukcq, cur_cqe);
  
          if (ret)
                  return ret;
  
          irdma_process_cqe(entry, cur_cqe);
  
          return 0;
  }
  
  /**
   * __irdma_poll_cq - poll cq for completion (kernel apps)
   * @iwcq: cq to poll
   * @num_entries: number of entries to poll
   * @entry: wr of a completed entry
   */
  static int
  __irdma_poll_cq(struct irdma_cq *iwcq, int num_entries, struct ib_wc *entry)
  {
          struct list_head *tmp_node, *list_node;
          struct irdma_cq_buf *last_buf = NULL;
          struct irdma_cq_poll_info *cur_cqe = &iwcq->cur_cqe;
          struct irdma_cq_buf *cq_buf;
          int ret;
          struct irdma_device *iwdev;
          struct irdma_cq_uk *ukcq;
          bool cq_new_cqe = false;
          int resized_bufs = 0;
          int npolled = 0;
  
          iwdev = to_iwdev(iwcq->ibcq.device);
          ukcq = &iwcq->sc_cq.cq_uk;
  
          /* go through the list of previously resized CQ buffers */
          list_for_each_safe(list_node, tmp_node, &iwcq->resize_list) {
                  cq_buf = container_of(list_node, struct irdma_cq_buf, list);
                  while (npolled < num_entries) {
                          ret = irdma_poll_one(&cq_buf->cq_uk, cur_cqe, entry + npolled);
                          if (!ret) {
                                  ++npolled;
                                  cq_new_cqe = true;
                                  continue;
                          }
                          if (ret == -ENOENT)
                                  break;
                          /* QP using the CQ is destroyed. Skip reporting this CQE */
                          if (ret == -EFAULT) {
                                  cq_new_cqe = true;
                                  continue;
                          }
                          goto error;
                  }
  
                  /* save the resized CQ buffer which received the last cqe */
                  if (cq_new_cqe)
                          last_buf = cq_buf;
                  cq_new_cqe = false;
          }
  
          /* check the current CQ for new cqes */
          while (npolled < num_entries) {
                  ret = irdma_poll_one(ukcq, cur_cqe, entry + npolled);
                  if (ret == -ENOENT) {
                          ret = irdma_generated_cmpls(iwcq, cur_cqe);
                          if (!ret)
                                  irdma_process_cqe(entry + npolled, cur_cqe);
                  }
                  if (!ret) {
                          ++npolled;
                          cq_new_cqe = true;
                          continue;
                  }
  
                  if (ret == -ENOENT)
                          break;
                  /* QP using the CQ is destroyed. Skip reporting this CQE */
                  if (ret == -EFAULT) {
                          cq_new_cqe = true;
                          continue;
                  }
                  goto error;
          }
  
          if (cq_new_cqe)
                  /* all previous CQ resizes are complete */
                  resized_bufs = irdma_process_resize_list(iwcq, iwdev, NULL);
          else if (last_buf)
                  /* only CQ resizes up to the last_buf are complete */
                  resized_bufs = irdma_process_resize_list(iwcq, iwdev, last_buf);
          if (resized_bufs)
                  /* report to the HW the number of complete CQ resizes */
                  irdma_uk_cq_set_resized_cnt(ukcq, resized_bufs);
  
          return npolled;
  error:
          irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                      "%s: Error polling CQ, irdma_err: %d\n", __func__, ret);
  
          return ret;
  }
  
  /**
   * irdma_poll_cq - poll cq for completion (kernel apps)
   * @ibcq: cq to poll
   * @num_entries: number of entries to poll
   * @entry: wr of a completed entry
   */
  static int
  irdma_poll_cq(struct ib_cq *ibcq, int num_entries,
                struct ib_wc *entry)
  {
          struct irdma_cq *iwcq;
          unsigned long flags;
          int ret;
  
          iwcq = to_iwcq(ibcq);
  
          spin_lock_irqsave(&iwcq->lock, flags);
          ret = __irdma_poll_cq(iwcq, num_entries, entry);
          spin_unlock_irqrestore(&iwcq->lock, flags);
  
          return ret;
  }
  
  /**
   * irdma_req_notify_cq - arm cq kernel application
   * @ibcq: cq to arm
   * @notify_flags: notofication flags
   */
  static int
  irdma_req_notify_cq(struct ib_cq *ibcq,
                      enum ib_cq_notify_flags notify_flags)
  {
          struct irdma_cq *iwcq;
          struct irdma_cq_uk *ukcq;
          unsigned long flags;
          enum irdma_cmpl_notify cq_notify = IRDMA_CQ_COMPL_EVENT;
          bool promo_event = false;
          int ret = 0;
  
          iwcq = to_iwcq(ibcq);
          ukcq = &iwcq->sc_cq.cq_uk;
  
          spin_lock_irqsave(&iwcq->lock, flags);
          if (notify_flags == IB_CQ_SOLICITED) {
                  cq_notify = IRDMA_CQ_COMPL_SOLICITED;
          } else {
                  if (iwcq->last_notify == IRDMA_CQ_COMPL_SOLICITED)
                          promo_event = true;
          }
  
          if (!atomic_cmpxchg(&iwcq->armed, 0, 1) || promo_event) {
                  iwcq->last_notify = cq_notify;
                  irdma_uk_cq_request_notification(ukcq, cq_notify);
          }
  
          if ((notify_flags & IB_CQ_REPORT_MISSED_EVENTS) &&
              (!irdma_cq_empty(iwcq) || !list_empty(&iwcq->cmpl_generated)))
                  ret = 1;
          spin_unlock_irqrestore(&iwcq->lock, flags);
  
          return ret;
  }
  
  /**
   * mcast_list_add -  Add a new mcast item to list
   * @rf: RDMA PCI function
   * @new_elem: pointer to element to add
   */
  static void
  mcast_list_add(struct irdma_pci_f *rf,
                 struct mc_table_list *new_elem)
  {
          list_add(&new_elem->list, &rf->mc_qht_list.list);
  }
  
  /**
   * mcast_list_del - Remove an mcast item from list
   * @mc_qht_elem: pointer to mcast table list element
   */
  static void
  mcast_list_del(struct mc_table_list *mc_qht_elem)
  {
          if (mc_qht_elem)
                  list_del(&mc_qht_elem->list);
  }
  
  /**
   * mcast_list_lookup_ip - Search mcast list for address
   * @rf: RDMA PCI function
   * @ip_mcast: pointer to mcast IP address
   */
  static struct mc_table_list *
  mcast_list_lookup_ip(struct irdma_pci_f *rf,
                       u32 *ip_mcast)
  {
          struct mc_table_list *mc_qht_el;
          struct list_head *pos, *q;
  
          list_for_each_safe(pos, q, &rf->mc_qht_list.list) {
                  mc_qht_el = list_entry(pos, struct mc_table_list, list);
                  if (!memcmp(mc_qht_el->mc_info.dest_ip, ip_mcast,
                              sizeof(mc_qht_el->mc_info.dest_ip)))
                          return mc_qht_el;
          }
  
          return NULL;
  }
  
  /**
   * irdma_mcast_cqp_op - perform a mcast cqp operation
   * @iwdev: irdma device
   * @mc_grp_ctx: mcast group info
   * @op: operation
   *
   * returns error status
   */
  static int
  irdma_mcast_cqp_op(struct irdma_device *iwdev,
                     struct irdma_mcast_grp_info *mc_grp_ctx, u8 op)
  {
          struct cqp_cmds_info *cqp_info;
          struct irdma_cqp_request *cqp_request;
          int status;
  
          cqp_request = irdma_alloc_and_get_cqp_request(&iwdev->rf->cqp, true);
          if (!cqp_request)
                  return -ENOMEM;
  
          cqp_request->info.in.u.mc_create.info = *mc_grp_ctx;
          cqp_info = &cqp_request->info;
          cqp_info->cqp_cmd = op;
          cqp_info->post_sq = 1;
          cqp_info->in.u.mc_create.scratch = (uintptr_t)cqp_request;
          cqp_info->in.u.mc_create.cqp = &iwdev->rf->cqp.sc_cqp;
          status = irdma_handle_cqp_op(iwdev->rf, cqp_request);
          irdma_put_cqp_request(&iwdev->rf->cqp, cqp_request);
  
          return status;
  }
  
  /**
   * irdma_attach_mcast - attach a qp to a multicast group
   * @ibqp: ptr to qp
   * @ibgid: pointer to global ID
   * @lid: local ID
   *
   * returns error status
   */
  static int
  irdma_attach_mcast(struct ib_qp *ibqp, union ib_gid *ibgid, u16 lid)
  {
          struct irdma_qp *iwqp = to_iwqp(ibqp);
          struct irdma_device *iwdev = iwqp->iwdev;
          struct irdma_pci_f *rf = iwdev->rf;
          struct mc_table_list *mc_qht_elem;
          struct irdma_mcast_grp_ctx_entry_info mcg_info = {0};
          unsigned long flags;
          u32 ip_addr[4] = {0};
          u32 mgn;
          u32 no_mgs;
          int ret = 0;
          bool ipv4;
          u16 vlan_id;
          union {
                  struct sockaddr saddr;
                  struct sockaddr_in saddr_in;
                  struct sockaddr_in6 saddr_in6;
          } sgid_addr;
          unsigned char dmac[ETH_ALEN];
  
          rdma_gid2ip((struct sockaddr *)&sgid_addr, ibgid);
  
          if (!ipv6_addr_v4mapped((struct in6_addr *)ibgid)) {
                  irdma_copy_ip_ntohl(ip_addr,
                                      sgid_addr.saddr_in6.sin6_addr.__u6_addr.__u6_addr32);
                  irdma_netdev_vlan_ipv6(ip_addr, &vlan_id, NULL);
                  ipv4 = false;
                  irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                              "qp_id=%d, IP6address=%pI6\n", ibqp->qp_num,
                              ip_addr);
                  irdma_mcast_mac_v6(ip_addr, dmac);
          } else {
                  ip_addr[0] = ntohl(sgid_addr.saddr_in.sin_addr.s_addr);
                  ipv4 = true;
                  vlan_id = irdma_get_vlan_ipv4(ip_addr);
                  irdma_mcast_mac_v4(ip_addr, dmac);
                  irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                              "qp_id=%d, IP4address=%pI4, MAC=%pM\n",
                              ibqp->qp_num, ip_addr, dmac);
          }
  
          spin_lock_irqsave(&rf->qh_list_lock, flags);
          mc_qht_elem = mcast_list_lookup_ip(rf, ip_addr);
          if (!mc_qht_elem) {
                  struct irdma_dma_mem *dma_mem_mc;
  
                  spin_unlock_irqrestore(&rf->qh_list_lock, flags);
                  mc_qht_elem = kzalloc(sizeof(*mc_qht_elem), GFP_KERNEL);
                  if (!mc_qht_elem)
                          return -ENOMEM;
  
                  mc_qht_elem->mc_info.ipv4_valid = ipv4;
                  memcpy(mc_qht_elem->mc_info.dest_ip, ip_addr,
                         sizeof(mc_qht_elem->mc_info.dest_ip));
                  ret = irdma_alloc_rsrc(rf, rf->allocated_mcgs, rf->max_mcg,
                                         &mgn, &rf->next_mcg);
                  if (ret) {
                          kfree(mc_qht_elem);
                          return -ENOMEM;
                  }
  
                  mc_qht_elem->mc_info.mgn = mgn;
                  dma_mem_mc = &mc_qht_elem->mc_grp_ctx.dma_mem_mc;
                  dma_mem_mc->size = sizeof(u64)* IRDMA_MAX_MGS_PER_CTX;
                  dma_mem_mc->va = irdma_allocate_dma_mem(&rf->hw, dma_mem_mc,
                                                          dma_mem_mc->size,
                                                          IRDMA_HW_PAGE_SIZE);
                  if (!dma_mem_mc->va) {
                          irdma_free_rsrc(rf, rf->allocated_mcgs, mgn);
                          kfree(mc_qht_elem);
                          return -ENOMEM;
                  }
  
                  mc_qht_elem->mc_grp_ctx.mg_id = (u16)mgn;
                  memcpy(mc_qht_elem->mc_grp_ctx.dest_ip_addr, ip_addr,
                         sizeof(mc_qht_elem->mc_grp_ctx.dest_ip_addr));
                  mc_qht_elem->mc_grp_ctx.ipv4_valid = ipv4;
                  mc_qht_elem->mc_grp_ctx.vlan_id = vlan_id;
                  if (vlan_id < VLAN_N_VID)
                          mc_qht_elem->mc_grp_ctx.vlan_valid = true;
                  mc_qht_elem->mc_grp_ctx.hmc_fcn_id = iwdev->rf->sc_dev.hmc_fn_id;
                  mc_qht_elem->mc_grp_ctx.qs_handle =
                      iwqp->sc_qp.vsi->qos[iwqp->sc_qp.user_pri].qs_handle;
                  ether_addr_copy(mc_qht_elem->mc_grp_ctx.dest_mac_addr, dmac);
  
                  spin_lock_irqsave(&rf->qh_list_lock, flags);
                  mcast_list_add(rf, mc_qht_elem);
          } else {
                  if (mc_qht_elem->mc_grp_ctx.no_of_mgs ==
                      IRDMA_MAX_MGS_PER_CTX) {
                          spin_unlock_irqrestore(&rf->qh_list_lock, flags);
                          return -ENOMEM;
                  }
          }
  
          mcg_info.qp_id = iwqp->ibqp.qp_num;
          no_mgs = mc_qht_elem->mc_grp_ctx.no_of_mgs;
          irdma_sc_add_mcast_grp(&mc_qht_elem->mc_grp_ctx, &mcg_info);
          spin_unlock_irqrestore(&rf->qh_list_lock, flags);
  
          /* Only if there is a change do we need to modify or create */
          if (!no_mgs) {
                  ret = irdma_mcast_cqp_op(iwdev, &mc_qht_elem->mc_grp_ctx,
                                           IRDMA_OP_MC_CREATE);
          } else if (no_mgs != mc_qht_elem->mc_grp_ctx.no_of_mgs) {
                  ret = irdma_mcast_cqp_op(iwdev, &mc_qht_elem->mc_grp_ctx,
                                           IRDMA_OP_MC_MODIFY);
          } else {
                  return 0;
          }
  
          if (ret)
                  goto error;
  
          return 0;
  
  error:
          irdma_sc_del_mcast_grp(&mc_qht_elem->mc_grp_ctx, &mcg_info);
          if (!mc_qht_elem->mc_grp_ctx.no_of_mgs) {
                  mcast_list_del(mc_qht_elem);
                  irdma_free_dma_mem(&rf->hw,
                                     &mc_qht_elem->mc_grp_ctx.dma_mem_mc);
                  irdma_free_rsrc(rf, rf->allocated_mcgs,
                                  mc_qht_elem->mc_grp_ctx.mg_id);
                  kfree(mc_qht_elem);
          }
  
          return ret;
  }
  
  /**
   * irdma_detach_mcast - detach a qp from a multicast group
   * @ibqp: ptr to qp
   * @ibgid: pointer to global ID
   * @lid: local ID
   *
   * returns error status
   */
  static int
  irdma_detach_mcast(struct ib_qp *ibqp, union ib_gid *ibgid, u16 lid)
  {
          struct irdma_qp *iwqp = to_iwqp(ibqp);
          struct irdma_device *iwdev = iwqp->iwdev;
          struct irdma_pci_f *rf = iwdev->rf;
          u32 ip_addr[4] = {0};
          struct mc_table_list *mc_qht_elem;
          struct irdma_mcast_grp_ctx_entry_info mcg_info = {0};
          int ret;
          unsigned long flags;
          union {
                  struct sockaddr saddr;
                  struct sockaddr_in saddr_in;
                  struct sockaddr_in6 saddr_in6;
          } sgid_addr;
  
          rdma_gid2ip((struct sockaddr *)&sgid_addr, ibgid);
          if (!ipv6_addr_v4mapped((struct in6_addr *)ibgid))
                  irdma_copy_ip_ntohl(ip_addr,
                                      sgid_addr.saddr_in6.sin6_addr.__u6_addr.__u6_addr32);
          else
                  ip_addr[0] = ntohl(sgid_addr.saddr_in.sin_addr.s_addr);
  
          spin_lock_irqsave(&rf->qh_list_lock, flags);
          mc_qht_elem = mcast_list_lookup_ip(rf, ip_addr);
          if (!mc_qht_elem) {
                  spin_unlock_irqrestore(&rf->qh_list_lock, flags);
                  irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                              "address not found MCG\n");
                  return 0;
          }
  
          mcg_info.qp_id = iwqp->ibqp.qp_num;
          irdma_sc_del_mcast_grp(&mc_qht_elem->mc_grp_ctx, &mcg_info);
          if (!mc_qht_elem->mc_grp_ctx.no_of_mgs) {
                  mcast_list_del(mc_qht_elem);
                  spin_unlock_irqrestore(&rf->qh_list_lock, flags);
                  ret = irdma_mcast_cqp_op(iwdev, &mc_qht_elem->mc_grp_ctx,
                                           IRDMA_OP_MC_DESTROY);
                  if (ret) {
                          irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                                      "failed MC_DESTROY MCG\n");
                          spin_lock_irqsave(&rf->qh_list_lock, flags);
                          mcast_list_add(rf, mc_qht_elem);
                          spin_unlock_irqrestore(&rf->qh_list_lock, flags);
                          return -EAGAIN;
                  }
  
                  irdma_free_dma_mem(&rf->hw,
                                     &mc_qht_elem->mc_grp_ctx.dma_mem_mc);
                  irdma_free_rsrc(rf, rf->allocated_mcgs,
                                  mc_qht_elem->mc_grp_ctx.mg_id);
                  kfree(mc_qht_elem);
          } else {
                  spin_unlock_irqrestore(&rf->qh_list_lock, flags);
                  ret = irdma_mcast_cqp_op(iwdev, &mc_qht_elem->mc_grp_ctx,
                                           IRDMA_OP_MC_MODIFY);
                  if (ret) {
                          irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_VERBS,
                                      "failed Modify MCG\n");
                          return ret;
                  }
          }
  
          return 0;
  }
  
  /**
   * irdma_query_ah - Query address handle
   * @ibah: pointer to address handle
   * @ah_attr: address handle attributes
   */
  static int
  irdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
  {
          struct irdma_ah *ah = to_iwah(ibah);
  
          memset(ah_attr, 0, sizeof(*ah_attr));
          if (ah->av.attrs.ah_flags & IB_AH_GRH) {
                  ah_attr->ah_flags = IB_AH_GRH;
                  ah_attr->grh.flow_label = ah->sc_ah.ah_info.flow_label;
                  ah_attr->grh.traffic_class = ah->sc_ah.ah_info.tc_tos;
                  ah_attr->grh.hop_limit = ah->sc_ah.ah_info.hop_ttl;
                  ah_attr->grh.sgid_index = ah->sgid_index;
                  ah_attr->grh.sgid_index = ah->sgid_index;
                  memcpy(&ah_attr->grh.dgid, &ah->dgid,
                         sizeof(ah_attr->grh.dgid));
          }
  
          return 0;
  }
  
  static __be64 irdma_mac_to_guid(struct ifnet *ndev){
          const unsigned char *mac = IF_LLADDR(ndev);
          __be64 guid;
          unsigned char *dst = (unsigned char *)&guid;
  
          dst[0] = mac[0] ^ 2;
          dst[1] = mac[1];
          dst[2] = mac[2];
          dst[3] = 0xff;
          dst[4] = 0xfe;
          dst[5] = mac[3];
          dst[6] = mac[4];
          dst[7] = mac[5];
  
          return guid;
  }
  
  static struct ifnet *
  irdma_get_netdev(struct ib_device *ibdev, u8 port_num)
  {
          struct irdma_device *iwdev = to_iwdev(ibdev);
  
          if (iwdev->netdev) {
                  dev_hold(iwdev->netdev);
                  return iwdev->netdev;
          }
  
          return NULL;
  }
  
  static void
  irdma_set_device_ops(struct ib_device *ibdev)
  {
          struct ib_device *dev_ops = ibdev;
  
          dev_ops->ops.driver_id = RDMA_DRIVER_I40IW;
          dev_ops->ops.size_ib_ah = IRDMA_SET_RDMA_OBJ_SIZE(ib_ah, irdma_ah, ibah);
          dev_ops->ops.size_ib_cq = IRDMA_SET_RDMA_OBJ_SIZE(ib_cq, irdma_cq, ibcq);
          dev_ops->ops.size_ib_pd = IRDMA_SET_RDMA_OBJ_SIZE(ib_pd, irdma_pd, ibpd);
          dev_ops->ops.size_ib_ucontext = IRDMA_SET_RDMA_OBJ_SIZE(ib_ucontext,
                                                                  irdma_ucontext,
                                                                  ibucontext);
  
          dev_ops->alloc_hw_stats = irdma_alloc_hw_stats;
          dev_ops->alloc_mr = irdma_alloc_mr;
          dev_ops->alloc_mw = irdma_alloc_mw;
          dev_ops->alloc_pd = irdma_alloc_pd;
          dev_ops->alloc_ucontext = irdma_alloc_ucontext;
          dev_ops->create_cq = irdma_create_cq;
          dev_ops->create_qp = irdma_create_qp;
          dev_ops->dealloc_mw = irdma_dealloc_mw;
          dev_ops->dealloc_pd = irdma_dealloc_pd;
          dev_ops->dealloc_ucontext = irdma_dealloc_ucontext;
          dev_ops->dereg_mr = irdma_dereg_mr;
          dev_ops->destroy_cq = irdma_destroy_cq;
          dev_ops->destroy_qp = irdma_destroy_qp;
          dev_ops->disassociate_ucontext = irdma_disassociate_ucontext;
          dev_ops->get_dev_fw_str = irdma_get_dev_fw_str;
          dev_ops->get_dma_mr = irdma_get_dma_mr;
          dev_ops->get_hw_stats = irdma_get_hw_stats;
          dev_ops->get_netdev = irdma_get_netdev;
          dev_ops->map_mr_sg = irdma_map_mr_sg;
          dev_ops->mmap = irdma_mmap;
          dev_ops->mmap_free = irdma_mmap_free;
          dev_ops->poll_cq = irdma_poll_cq;
          dev_ops->post_recv = irdma_post_recv;
          dev_ops->post_send = irdma_post_send;
          dev_ops->query_device = irdma_query_device;
          dev_ops->query_port = irdma_query_port;
          dev_ops->modify_port = irdma_modify_port;
          dev_ops->query_qp = irdma_query_qp;
          dev_ops->reg_user_mr = irdma_reg_user_mr;
          dev_ops->rereg_user_mr = irdma_rereg_user_mr;
          dev_ops->req_notify_cq = irdma_req_notify_cq;
          dev_ops->resize_cq = irdma_resize_cq;
  }
  
  static void
  irdma_set_device_mcast_ops(struct ib_device *ibdev)
  {
          struct ib_device *dev_ops = ibdev;
          dev_ops->attach_mcast = irdma_attach_mcast;
          dev_ops->detach_mcast = irdma_detach_mcast;
  }
  
  static void
  irdma_set_device_roce_ops(struct ib_device *ibdev)
  {
          struct ib_device *dev_ops = ibdev;
          dev_ops->create_ah = irdma_create_ah;
          dev_ops->destroy_ah = irdma_destroy_ah;
          dev_ops->get_link_layer = irdma_get_link_layer;
          dev_ops->get_port_immutable = irdma_roce_port_immutable;
          dev_ops->modify_qp = irdma_modify_qp_roce;
          dev_ops->query_ah = irdma_query_ah;
          dev_ops->query_gid = irdma_query_gid_roce;
          dev_ops->query_pkey = irdma_query_pkey;
          ibdev->add_gid = irdma_add_gid;
          ibdev->del_gid = irdma_del_gid;
  }
  
  static void
  irdma_set_device_iw_ops(struct ib_device *ibdev)
  {
          struct ib_device *dev_ops = ibdev;
  
          ibdev->uverbs_cmd_mask |=
              (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
              (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
  
          dev_ops->create_ah = irdma_create_ah_stub;
          dev_ops->destroy_ah = irdma_destroy_ah_stub;
          dev_ops->get_port_immutable = irdma_iw_port_immutable;
          dev_ops->modify_qp = irdma_modify_qp;
          dev_ops->query_gid = irdma_query_gid;
          dev_ops->query_pkey = irdma_iw_query_pkey;
  }
  
  static inline void
  irdma_set_device_gen1_ops(struct ib_device *ibdev)
  {
  }
  
  /**
   * irdma_init_roce_device - initialization of roce rdma device
   * @iwdev: irdma device
   */
  static void
  irdma_init_roce_device(struct irdma_device *iwdev)
  {
          kc_set_roce_uverbs_cmd_mask(iwdev);
          iwdev->ibdev.node_type = RDMA_NODE_IB_CA;
          iwdev->ibdev.node_guid = irdma_mac_to_guid(iwdev->netdev);
          irdma_set_device_roce_ops(&iwdev->ibdev);
          if (iwdev->rf->rdma_ver == IRDMA_GEN_2)
                  irdma_set_device_mcast_ops(&iwdev->ibdev);
  }
  
  /**
   * irdma_init_iw_device - initialization of iwarp rdma device
   * @iwdev: irdma device
   */
  static int
  irdma_init_iw_device(struct irdma_device *iwdev)
  {
          struct ifnet *netdev = iwdev->netdev;
  
          iwdev->ibdev.node_type = RDMA_NODE_RNIC;
          ether_addr_copy((u8 *)&iwdev->ibdev.node_guid, IF_LLADDR(netdev));
          iwdev->ibdev.iwcm = kzalloc(sizeof(*iwdev->ibdev.iwcm), GFP_KERNEL);
          if (!iwdev->ibdev.iwcm)
                  return -ENOMEM;
  
          iwdev->ibdev.iwcm->add_ref = irdma_qp_add_ref;
          iwdev->ibdev.iwcm->rem_ref = irdma_qp_rem_ref;
          iwdev->ibdev.iwcm->get_qp = irdma_get_qp;
          iwdev->ibdev.iwcm->connect = irdma_connect;
          iwdev->ibdev.iwcm->accept = irdma_accept;
          iwdev->ibdev.iwcm->reject = irdma_reject;
          iwdev->ibdev.iwcm->create_listen = irdma_create_listen;
          iwdev->ibdev.iwcm->destroy_listen = irdma_destroy_listen;
          memcpy(iwdev->ibdev.iwcm->ifname, if_name(netdev),
                 sizeof(iwdev->ibdev.iwcm->ifname));
          irdma_set_device_iw_ops(&iwdev->ibdev);
  
          return 0;
  }
  
  /**
   * irdma_init_rdma_device - initialization of rdma device
   * @iwdev: irdma device
   */
  static int
  irdma_init_rdma_device(struct irdma_device *iwdev)
  {
          struct pci_dev *pcidev = iwdev->rf->pcidev;
          int ret;
  
          iwdev->ibdev.owner = THIS_MODULE;
          iwdev->ibdev.uverbs_abi_ver = IRDMA_ABI_VER;
          kc_set_rdma_uverbs_cmd_mask(iwdev);
  
          if (iwdev->roce_mode) {
                  irdma_init_roce_device(iwdev);
          } else {
                  ret = irdma_init_iw_device(iwdev);
                  if (ret)
                          return ret;
          }
  
          iwdev->ibdev.phys_port_cnt = 1;
          iwdev->ibdev.num_comp_vectors = iwdev->rf->ceqs_count;
          iwdev->ibdev.dev.parent = iwdev->rf->dev_ctx.dev;
          set_ibdev_dma_device(iwdev->ibdev, &pcidev->dev);
          irdma_set_device_ops(&iwdev->ibdev);
          if (iwdev->rf->rdma_ver == IRDMA_GEN_1)
                  irdma_set_device_gen1_ops(&iwdev->ibdev);
  
          return 0;
  }
  
  /**
   * irdma_port_ibevent - indicate port event
   * @iwdev: irdma device
   */
  void
  irdma_port_ibevent(struct irdma_device *iwdev)
  {
          struct ib_event event;
  
          event.device = &iwdev->ibdev;
          event.element.port_num = 1;
          event.event =
              iwdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
          ib_dispatch_event(&event);
  }
  
  /**
   * irdma_ib_unregister_device - unregister rdma device from IB
   * core
   * @iwdev: irdma device
   */
  void
  irdma_ib_unregister_device(struct irdma_device *iwdev)
  {
          iwdev->iw_status = 0;
          irdma_port_ibevent(iwdev);
          ib_unregister_device(&iwdev->ibdev);
          dev_put(iwdev->netdev);
          kfree(iwdev->ibdev.iwcm);
          iwdev->ibdev.iwcm = NULL;
  }
  
  /**
   * irdma_ib_register_device - register irdma device to IB core
   * @iwdev: irdma device
   */
  int
  irdma_ib_register_device(struct irdma_device *iwdev)
  {
          int ret;
  
          ret = irdma_init_rdma_device(iwdev);
          if (ret)
                  return ret;
  
          dev_hold(iwdev->netdev);
          sprintf(iwdev->ibdev.name, "irdma-%s", if_name(iwdev->netdev));
          ret = ib_register_device(&iwdev->ibdev, NULL);
          if (ret)
                  goto error;
  
          iwdev->iw_status = 1;
          irdma_port_ibevent(iwdev);
  
          return 0;
  
  error:
          kfree(iwdev->ibdev.iwcm);
          iwdev->ibdev.iwcm = NULL;
          irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_VERBS, "Register RDMA device fail\n");
  
          return ret;
  }

Cache object: 8f9f2711cc85bb640feb541935172cbe