/*
 * Broadcom NetXtreme-E RoCE driver.
 *
 * Copyright (c) 2016 - 2017, Broadcom. All rights reserved.  The term
 * Broadcom refers to Broadcom Limited and/or its subsidiaries.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * BSD license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Description: IB Verbs interpreter
 */

#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/if_ether.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_mad.h>
#include <rdma/ib_cache.h>
#include <rdma/uverbs_ioctl.h>

#include "bnxt_ulp.h"

#include "roce_hsi.h"
#include "qplib_res.h"
#include "qplib_sp.h"
#include "qplib_fp.h"
#include "qplib_rcfw.h"

#include "bnxt_re.h"
#include "ib_verbs.h"
#include <rdma/bnxt_re-abi.h>

static int __from_ib_access_flags(int iflags)
{
        int qflags = 0;

        if (iflags & IB_ACCESS_LOCAL_WRITE)
                qflags |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
        if (iflags & IB_ACCESS_REMOTE_READ)
                qflags |= BNXT_QPLIB_ACCESS_REMOTE_READ;
        if (iflags & IB_ACCESS_REMOTE_WRITE)
                qflags |= BNXT_QPLIB_ACCESS_REMOTE_WRITE;
        if (iflags & IB_ACCESS_REMOTE_ATOMIC)
                qflags |= BNXT_QPLIB_ACCESS_REMOTE_ATOMIC;
        if (iflags & IB_ACCESS_MW_BIND)
                qflags |= BNXT_QPLIB_ACCESS_MW_BIND;
        if (iflags & IB_ZERO_BASED)
                qflags |= BNXT_QPLIB_ACCESS_ZERO_BASED;
        if (iflags & IB_ACCESS_ON_DEMAND)
                qflags |= BNXT_QPLIB_ACCESS_ON_DEMAND;
        return qflags;
};

static enum ib_access_flags __to_ib_access_flags(int qflags)
{
        enum ib_access_flags iflags = 0;

        if (qflags & BNXT_QPLIB_ACCESS_LOCAL_WRITE)
                iflags |= IB_ACCESS_LOCAL_WRITE;
        if (qflags & BNXT_QPLIB_ACCESS_REMOTE_WRITE)
                iflags |= IB_ACCESS_REMOTE_WRITE;
        if (qflags & BNXT_QPLIB_ACCESS_REMOTE_READ)
                iflags |= IB_ACCESS_REMOTE_READ;
        if (qflags & BNXT_QPLIB_ACCESS_REMOTE_ATOMIC)
                iflags |= IB_ACCESS_REMOTE_ATOMIC;
        if (qflags & BNXT_QPLIB_ACCESS_MW_BIND)
                iflags |= IB_ACCESS_MW_BIND;
        if (qflags & BNXT_QPLIB_ACCESS_ZERO_BASED)
                iflags |= IB_ZERO_BASED;
        if (qflags & BNXT_QPLIB_ACCESS_ON_DEMAND)
                iflags |= IB_ACCESS_ON_DEMAND;
        return iflags;
};

static int bnxt_re_build_sgl(struct ib_sge *ib_sg_list,
                             struct bnxt_qplib_sge *sg_list, int num)
{
        int i, total = 0;

        for (i = 0; i < num; i++) {
                sg_list[i].addr = ib_sg_list[i].addr;
                sg_list[i].lkey = ib_sg_list[i].lkey;
                sg_list[i].size = ib_sg_list[i].length;
                total += sg_list[i].size;
        }
        return total;
}

/* Device */
int bnxt_re_query_device(struct ib_device *ibdev,
                         struct ib_device_attr *ib_attr,
                         struct ib_udata *udata)
{
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
        struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;

        memset(ib_attr, 0, sizeof(*ib_attr));
        memcpy(&ib_attr->fw_ver, dev_attr->fw_ver,
               min(sizeof(dev_attr->fw_ver),
                   sizeof(ib_attr->fw_ver)));
        bnxt_qplib_get_guid(rdev->netdev->dev_addr,
                            (u8 *)&ib_attr->sys_image_guid);
        ib_attr->max_mr_size = BNXT_RE_MAX_MR_SIZE;
        ib_attr->page_size_cap = BNXT_RE_PAGE_SIZE_4K | BNXT_RE_PAGE_SIZE_2M;

        ib_attr->vendor_id = rdev->en_dev->pdev->vendor;
        ib_attr->vendor_part_id = rdev->en_dev->pdev->device;
        ib_attr->hw_ver = rdev->en_dev->pdev->subsystem_device;
        ib_attr->max_qp = dev_attr->max_qp;
        ib_attr->max_qp_wr = dev_attr->max_qp_wqes;
        ib_attr->device_cap_flags =
                                    IB_DEVICE_CURR_QP_STATE_MOD
                                    | IB_DEVICE_RC_RNR_NAK_GEN
                                    | IB_DEVICE_SHUTDOWN_PORT
                                    | IB_DEVICE_SYS_IMAGE_GUID
                                    | IB_DEVICE_LOCAL_DMA_LKEY
                                    | IB_DEVICE_RESIZE_MAX_WR
                                    | IB_DEVICE_PORT_ACTIVE_EVENT
                                    | IB_DEVICE_N_NOTIFY_CQ
                                    | IB_DEVICE_MEM_WINDOW
                                    | IB_DEVICE_MEM_WINDOW_TYPE_2B
                                    | IB_DEVICE_MEM_MGT_EXTENSIONS;
        ib_attr->max_send_sge = dev_attr->max_qp_sges;
        ib_attr->max_recv_sge = dev_attr->max_qp_sges;
        ib_attr->max_sge_rd = dev_attr->max_qp_sges;
        ib_attr->max_cq = dev_attr->max_cq;
        ib_attr->max_cqe = dev_attr->max_cq_wqes;
        ib_attr->max_mr = dev_attr->max_mr;
        ib_attr->max_pd = dev_attr->max_pd;
        ib_attr->max_qp_rd_atom = dev_attr->max_qp_rd_atom;
        ib_attr->max_qp_init_rd_atom = dev_attr->max_qp_init_rd_atom;
        ib_attr->atomic_cap = IB_ATOMIC_NONE;
        ib_attr->masked_atomic_cap = IB_ATOMIC_NONE;
        if (dev_attr->is_atomic) {
                ib_attr->atomic_cap = IB_ATOMIC_GLOB;
                ib_attr->masked_atomic_cap = IB_ATOMIC_GLOB;
        }

        ib_attr->max_ee_rd_atom = 0;
        ib_attr->max_res_rd_atom = 0;
        ib_attr->max_ee_init_rd_atom = 0;
        ib_attr->max_ee = 0;
        ib_attr->max_rdd = 0;
        ib_attr->max_mw = dev_attr->max_mw;
        ib_attr->max_raw_ipv6_qp = 0;
        ib_attr->max_raw_ethy_qp = dev_attr->max_raw_ethy_qp;
        ib_attr->max_mcast_grp = 0;
        ib_attr->max_mcast_qp_attach = 0;
        ib_attr->max_total_mcast_qp_attach = 0;
        ib_attr->max_ah = dev_attr->max_ah;

        ib_attr->max_srq = dev_attr->max_srq;
        ib_attr->max_srq_wr = dev_attr->max_srq_wqes;
        ib_attr->max_srq_sge = dev_attr->max_srq_sges;

        ib_attr->max_fast_reg_page_list_len = MAX_PBL_LVL_1_PGS;

        ib_attr->max_pkeys = 1;
        ib_attr->local_ca_ack_delay = BNXT_RE_DEFAULT_ACK_DELAY;
        return 0;
}

/* Port */
int bnxt_re_query_port(struct ib_device *ibdev, u32 port_num,
                       struct ib_port_attr *port_attr)
{
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
        struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;

        memset(port_attr, 0, sizeof(*port_attr));

        if (netif_running(rdev->netdev) && netif_carrier_ok(rdev->netdev)) {
                port_attr->state = IB_PORT_ACTIVE;
                port_attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
        } else {
                port_attr->state = IB_PORT_DOWN;
                port_attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;
        }
        port_attr->max_mtu = IB_MTU_4096;
        port_attr->active_mtu = iboe_get_mtu(rdev->netdev->mtu);
        port_attr->gid_tbl_len = dev_attr->max_sgid;
        port_attr->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
                                    IB_PORT_DEVICE_MGMT_SUP |
                                    IB_PORT_VENDOR_CLASS_SUP;
        port_attr->ip_gids = true;

        port_attr->max_msg_sz = (u32)BNXT_RE_MAX_MR_SIZE_LOW;
        port_attr->bad_pkey_cntr = 0;
        port_attr->qkey_viol_cntr = 0;
        port_attr->pkey_tbl_len = dev_attr->max_pkey;
        port_attr->lid = 0;
        port_attr->sm_lid = 0;
        port_attr->lmc = 0;
        port_attr->max_vl_num = 4;
        port_attr->sm_sl = 0;
        port_attr->subnet_timeout = 0;
        port_attr->init_type_reply = 0;
        port_attr->active_speed = rdev->active_speed;
        port_attr->active_width = rdev->active_width;

        return 0;
}

int bnxt_re_get_port_immutable(struct ib_device *ibdev, u32 port_num,
                               struct ib_port_immutable *immutable)
{
        struct ib_port_attr port_attr;

        if (bnxt_re_query_port(ibdev, port_num, &port_attr))
                return -EINVAL;

        immutable->pkey_tbl_len = port_attr.pkey_tbl_len;
        immutable->gid_tbl_len = port_attr.gid_tbl_len;
        immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
        immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
        immutable->max_mad_size = IB_MGMT_MAD_SIZE;
        return 0;
}

void bnxt_re_query_fw_str(struct ib_device *ibdev, char *str)
{
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);

        snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d.%d",
                 rdev->dev_attr.fw_ver[0], rdev->dev_attr.fw_ver[1],
                 rdev->dev_attr.fw_ver[2], rdev->dev_attr.fw_ver[3]);
}

int bnxt_re_query_pkey(struct ib_device *ibdev, u32 port_num,
                       u16 index, u16 *pkey)
{
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);

        /* Ignore port_num */

        memset(pkey, 0, sizeof(*pkey));
        return bnxt_qplib_get_pkey(&rdev->qplib_res,
                                   &rdev->qplib_res.pkey_tbl, index, pkey);
}

int bnxt_re_query_gid(struct ib_device *ibdev, u32 port_num,
                      int index, union ib_gid *gid)
{
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
        int rc = 0;

        /* Ignore port_num */
        memset(gid, 0, sizeof(*gid));
        rc = bnxt_qplib_get_sgid(&rdev->qplib_res,
                                 &rdev->qplib_res.sgid_tbl, index,
                                 (struct bnxt_qplib_gid *)gid);
        return rc;
}

int bnxt_re_del_gid(const struct ib_gid_attr *attr, void **context)
{
        int rc = 0;
        struct bnxt_re_gid_ctx *ctx, **ctx_tbl;
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(attr->device, ibdev);
        struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
        struct bnxt_qplib_gid *gid_to_del;
        u16 vlan_id = 0xFFFF;

        /* Delete the entry from the hardware */
        ctx = *context;
        if (!ctx)
                return -EINVAL;

        if (sgid_tbl && sgid_tbl->active) {
                if (ctx->idx >= sgid_tbl->max)
                        return -EINVAL;
                gid_to_del = &sgid_tbl->tbl[ctx->idx].gid;
                vlan_id = sgid_tbl->tbl[ctx->idx].vlan_id;
                /* DEL_GID is called in WQ context(netdevice_event_work_handler)
                 * or via the ib_unregister_device path. In the former case QP1
                 * may not be destroyed yet, in which case just return as FW
                 * needs that entry to be present and will fail it's deletion.
                 * We could get invoked again after QP1 is destroyed OR get an
                 * ADD_GID call with a different GID value for the same index
                 * where we issue MODIFY_GID cmd to update the GID entry -- TBD
                 */
                if (ctx->idx == 0 &&
                    rdma_link_local_addr((struct in6_addr *)gid_to_del) &&
                    ctx->refcnt == 1 && rdev->gsi_ctx.gsi_sqp) {
                        ibdev_dbg(&rdev->ibdev,
                                  "Trying to delete GID0 while QP1 is alive\n");
                        return -EFAULT;
                }
                ctx->refcnt--;
                if (!ctx->refcnt) {
                        rc = bnxt_qplib_del_sgid(sgid_tbl, gid_to_del,
                                                 vlan_id,  true);
                        if (rc) {
                                ibdev_err(&rdev->ibdev,
                                          "Failed to remove GID: %#x", rc);
                        } else {
                                ctx_tbl = sgid_tbl->ctx;
                                ctx_tbl[ctx->idx] = NULL;
                                kfree(ctx);
                        }
                }
        } else {
                return -EINVAL;
        }
        return rc;
}

int bnxt_re_add_gid(const struct ib_gid_attr *attr, void **context)
{
        int rc;
        u32 tbl_idx = 0;
        u16 vlan_id = 0xFFFF;
        struct bnxt_re_gid_ctx *ctx, **ctx_tbl;
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(attr->device, ibdev);
        struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;

        rc = rdma_read_gid_l2_fields(attr, &vlan_id, NULL);
        if (rc)
                return rc;

        rc = bnxt_qplib_add_sgid(sgid_tbl, (struct bnxt_qplib_gid *)&attr->gid,
                                 rdev->qplib_res.netdev->dev_addr,
                                 vlan_id, true, &tbl_idx);
        if (rc == -EALREADY) {
                ctx_tbl = sgid_tbl->ctx;
                ctx_tbl[tbl_idx]->refcnt++;
                *context = ctx_tbl[tbl_idx];
                return 0;
        }

        if (rc < 0) {
                ibdev_err(&rdev->ibdev, "Failed to add GID: %#x", rc);
                return rc;
        }

        ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
        if (!ctx)
                return -ENOMEM;
        ctx_tbl = sgid_tbl->ctx;
        ctx->idx = tbl_idx;
        ctx->refcnt = 1;
        ctx_tbl[tbl_idx] = ctx;
        *context = ctx;

        return rc;
}

enum rdma_link_layer bnxt_re_get_link_layer(struct ib_device *ibdev,
                                            u32 port_num)
{
        return IB_LINK_LAYER_ETHERNET;
}

#define BNXT_RE_FENCE_PBL_SIZE  DIV_ROUND_UP(BNXT_RE_FENCE_BYTES, PAGE_SIZE)

static void bnxt_re_create_fence_wqe(struct bnxt_re_pd *pd)
{
        struct bnxt_re_fence_data *fence = &pd->fence;
        struct ib_mr *ib_mr = &fence->mr->ib_mr;
        struct bnxt_qplib_swqe *wqe = &fence->bind_wqe;

        memset(wqe, 0, sizeof(*wqe));
        wqe->type = BNXT_QPLIB_SWQE_TYPE_BIND_MW;
        wqe->wr_id = BNXT_QPLIB_FENCE_WRID;
        wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
        wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
        wqe->bind.zero_based = false;
        wqe->bind.parent_l_key = ib_mr->lkey;
        wqe->bind.va = (u64)(unsigned long)fence->va;
        wqe->bind.length = fence->size;
        wqe->bind.access_cntl = __from_ib_access_flags(IB_ACCESS_REMOTE_READ);
        wqe->bind.mw_type = SQ_BIND_MW_TYPE_TYPE1;

        /* Save the initial rkey in fence structure for now;
         * wqe->bind.r_key will be set at (re)bind time.
         */
        fence->bind_rkey = ib_inc_rkey(fence->mw->rkey);
}

static int bnxt_re_bind_fence_mw(struct bnxt_qplib_qp *qplib_qp)
{
        struct bnxt_re_qp *qp = container_of(qplib_qp, struct bnxt_re_qp,
                                             qplib_qp);
        struct ib_pd *ib_pd = qp->ib_qp.pd;
        struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
        struct bnxt_re_fence_data *fence = &pd->fence;
        struct bnxt_qplib_swqe *fence_wqe = &fence->bind_wqe;
        struct bnxt_qplib_swqe wqe;
        int rc;

        memcpy(&wqe, fence_wqe, sizeof(wqe));
        wqe.bind.r_key = fence->bind_rkey;
        fence->bind_rkey = ib_inc_rkey(fence->bind_rkey);

        ibdev_dbg(&qp->rdev->ibdev,
                  "Posting bind fence-WQE: rkey: %#x QP: %d PD: %p\n",
                wqe.bind.r_key, qp->qplib_qp.id, pd);
        rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
        if (rc) {
                ibdev_err(&qp->rdev->ibdev, "Failed to bind fence-WQE\n");
                return rc;
        }
        bnxt_qplib_post_send_db(&qp->qplib_qp);

        return rc;
}

static void bnxt_re_destroy_fence_mr(struct bnxt_re_pd *pd)
{
        struct bnxt_re_fence_data *fence = &pd->fence;
        struct bnxt_re_dev *rdev = pd->rdev;
        struct device *dev = &rdev->en_dev->pdev->dev;
        struct bnxt_re_mr *mr = fence->mr;

        if (fence->mw) {
                bnxt_re_dealloc_mw(fence->mw);
                fence->mw = NULL;
        }
        if (mr) {
                if (mr->ib_mr.rkey)
                        bnxt_qplib_dereg_mrw(&rdev->qplib_res, &mr->qplib_mr,
                                             true);
                if (mr->ib_mr.lkey)
                        bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
                kfree(mr);
                fence->mr = NULL;
        }
        if (fence->dma_addr) {
                dma_unmap_single(dev, fence->dma_addr, BNXT_RE_FENCE_BYTES,
                                 DMA_BIDIRECTIONAL);
                fence->dma_addr = 0;
        }
}

static int bnxt_re_create_fence_mr(struct bnxt_re_pd *pd)
{
        int mr_access_flags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_MW_BIND;
        struct bnxt_re_fence_data *fence = &pd->fence;
        struct bnxt_re_dev *rdev = pd->rdev;
        struct device *dev = &rdev->en_dev->pdev->dev;
        struct bnxt_re_mr *mr = NULL;
        dma_addr_t dma_addr = 0;
        struct ib_mw *mw;
        int rc;

        dma_addr = dma_map_single(dev, fence->va, BNXT_RE_FENCE_BYTES,
                                  DMA_BIDIRECTIONAL);
        rc = dma_mapping_error(dev, dma_addr);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Failed to dma-map fence-MR-mem\n");
                rc = -EIO;
                fence->dma_addr = 0;
                goto fail;
        }
        fence->dma_addr = dma_addr;

        /* Allocate a MR */
        mr = kzalloc(sizeof(*mr), GFP_KERNEL);
        if (!mr) {
                rc = -ENOMEM;
                goto fail;
        }
        fence->mr = mr;
        mr->rdev = rdev;
        mr->qplib_mr.pd = &pd->qplib_pd;
        mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
        mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
        rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Failed to alloc fence-HW-MR\n");
                goto fail;
        }

        /* Register MR */
        mr->ib_mr.lkey = mr->qplib_mr.lkey;
        mr->qplib_mr.va = (u64)(unsigned long)fence->va;
        mr->qplib_mr.total_size = BNXT_RE_FENCE_BYTES;
        rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, NULL,
                               BNXT_RE_FENCE_PBL_SIZE, PAGE_SIZE);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Failed to register fence-MR\n");
                goto fail;
        }
        mr->ib_mr.rkey = mr->qplib_mr.rkey;

        /* Create a fence MW only for kernel consumers */
        mw = bnxt_re_alloc_mw(&pd->ib_pd, IB_MW_TYPE_1, NULL);
        if (IS_ERR(mw)) {
                ibdev_err(&rdev->ibdev,
                          "Failed to create fence-MW for PD: %p\n", pd);
                rc = PTR_ERR(mw);
                goto fail;
        }
        fence->mw = mw;

        bnxt_re_create_fence_wqe(pd);
        return 0;

fail:
        bnxt_re_destroy_fence_mr(pd);
        return rc;
}

/* Protection Domains */
int bnxt_re_dealloc_pd(struct ib_pd *ib_pd, struct ib_udata *udata)
{
        struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
        struct bnxt_re_dev *rdev = pd->rdev;

        bnxt_re_destroy_fence_mr(pd);

        if (pd->qplib_pd.id)
                bnxt_qplib_dealloc_pd(&rdev->qplib_res, &rdev->qplib_res.pd_tbl,
                                      &pd->qplib_pd);
        return 0;
}

int bnxt_re_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
{
        struct ib_device *ibdev = ibpd->device;
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
        struct bnxt_re_ucontext *ucntx = rdma_udata_to_drv_context(
                udata, struct bnxt_re_ucontext, ib_uctx);
        struct bnxt_re_pd *pd = container_of(ibpd, struct bnxt_re_pd, ib_pd);
        int rc;

        pd->rdev = rdev;
        if (bnxt_qplib_alloc_pd(&rdev->qplib_res.pd_tbl, &pd->qplib_pd)) {
                ibdev_err(&rdev->ibdev, "Failed to allocate HW PD");
                rc = -ENOMEM;
                goto fail;
        }

        if (udata) {
                struct bnxt_re_pd_resp resp;

                if (!ucntx->dpi.dbr) {
                        /* Allocate DPI in alloc_pd to avoid failing of
                         * ibv_devinfo and family of application when DPIs
                         * are depleted.
                         */
                        if (bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
                                                 &ucntx->dpi, ucntx)) {
                                rc = -ENOMEM;
                                goto dbfail;
                        }
                }

                resp.pdid = pd->qplib_pd.id;
                /* Still allow mapping this DBR to the new user PD. */
                resp.dpi = ucntx->dpi.dpi;
                resp.dbr = (u64)ucntx->dpi.umdbr;

                rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
                if (rc) {
                        ibdev_err(&rdev->ibdev,
                                  "Failed to copy user response\n");
                        goto dbfail;
                }
        }

        if (!udata)
                if (bnxt_re_create_fence_mr(pd))
                        ibdev_warn(&rdev->ibdev,
                                   "Failed to create Fence-MR\n");
        return 0;
dbfail:
        bnxt_qplib_dealloc_pd(&rdev->qplib_res, &rdev->qplib_res.pd_tbl,
                              &pd->qplib_pd);
fail:
        return rc;
}

/* Address Handles */
int bnxt_re_destroy_ah(struct ib_ah *ib_ah, u32 flags)
{
        struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);
        struct bnxt_re_dev *rdev = ah->rdev;

        bnxt_qplib_destroy_ah(&rdev->qplib_res, &ah->qplib_ah,
                              !(flags & RDMA_DESTROY_AH_SLEEPABLE));
        return 0;
}

static u8 bnxt_re_stack_to_dev_nw_type(enum rdma_network_type ntype)
{
        u8 nw_type;

        switch (ntype) {
        case RDMA_NETWORK_IPV4:
                nw_type = CMDQ_CREATE_AH_TYPE_V2IPV4;
                break;
        case RDMA_NETWORK_IPV6:
                nw_type = CMDQ_CREATE_AH_TYPE_V2IPV6;
                break;
        default:
                nw_type = CMDQ_CREATE_AH_TYPE_V1;
                break;
        }
        return nw_type;
}

int bnxt_re_create_ah(struct ib_ah *ib_ah, struct rdma_ah_init_attr *init_attr,
                      struct ib_udata *udata)
{
        struct ib_pd *ib_pd = ib_ah->pd;
        struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
        struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
        const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
        struct bnxt_re_dev *rdev = pd->rdev;
        const struct ib_gid_attr *sgid_attr;
        struct bnxt_re_gid_ctx *ctx;
        struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);
        u8 nw_type;
        int rc;

        if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH)) {
                ibdev_err(&rdev->ibdev, "Failed to alloc AH: GRH not set");
                return -EINVAL;
        }

        ah->rdev = rdev;
        ah->qplib_ah.pd = &pd->qplib_pd;

        /* Supply the configuration for the HW */
        memcpy(ah->qplib_ah.dgid.data, grh->dgid.raw,
               sizeof(union ib_gid));
        sgid_attr = grh->sgid_attr;
        /* Get the HW context of the GID. The reference
         * of GID table entry is already taken by the caller.
         */
        ctx = rdma_read_gid_hw_context(sgid_attr);
        ah->qplib_ah.sgid_index = ctx->idx;
        ah->qplib_ah.host_sgid_index = grh->sgid_index;
        ah->qplib_ah.traffic_class = grh->traffic_class;
        ah->qplib_ah.flow_label = grh->flow_label;
        ah->qplib_ah.hop_limit = grh->hop_limit;
        ah->qplib_ah.sl = rdma_ah_get_sl(ah_attr);

        /* Get network header type for this GID */
        nw_type = rdma_gid_attr_network_type(sgid_attr);
        ah->qplib_ah.nw_type = bnxt_re_stack_to_dev_nw_type(nw_type);

        memcpy(ah->qplib_ah.dmac, ah_attr->roce.dmac, ETH_ALEN);
        rc = bnxt_qplib_create_ah(&rdev->qplib_res, &ah->qplib_ah,
                                  !(init_attr->flags &
                                    RDMA_CREATE_AH_SLEEPABLE));
        if (rc) {
                ibdev_err(&rdev->ibdev, "Failed to allocate HW AH");
                return rc;
        }

        /* Write AVID to shared page. */
        if (udata) {
                struct bnxt_re_ucontext *uctx = rdma_udata_to_drv_context(
                        udata, struct bnxt_re_ucontext, ib_uctx);
                unsigned long flag;
                u32 *wrptr;

                spin_lock_irqsave(&uctx->sh_lock, flag);
                wrptr = (u32 *)(uctx->shpg + BNXT_RE_AVID_OFFT);
                *wrptr = ah->qplib_ah.id;
                wmb(); /* make sure cache is updated. */
                spin_unlock_irqrestore(&uctx->sh_lock, flag);
        }

        return 0;
}

int bnxt_re_modify_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)
{
        return 0;
}

int bnxt_re_query_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)
{
        struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);

        ah_attr->type = ib_ah->type;
        rdma_ah_set_sl(ah_attr, ah->qplib_ah.sl);
        memcpy(ah_attr->roce.dmac, ah->qplib_ah.dmac, ETH_ALEN);
        rdma_ah_set_grh(ah_attr, NULL, 0,
                        ah->qplib_ah.host_sgid_index,
                        0, ah->qplib_ah.traffic_class);
        rdma_ah_set_dgid_raw(ah_attr, ah->qplib_ah.dgid.data);
        rdma_ah_set_port_num(ah_attr, 1);
        rdma_ah_set_static_rate(ah_attr, 0);
        return 0;
}

unsigned long bnxt_re_lock_cqs(struct bnxt_re_qp *qp)
        __acquires(&qp->scq->cq_lock) __acquires(&qp->rcq->cq_lock)
{
        unsigned long flags;

        spin_lock_irqsave(&qp->scq->cq_lock, flags);
        if (qp->rcq != qp->scq)
                spin_lock(&qp->rcq->cq_lock);
        else
                __acquire(&qp->rcq->cq_lock);

        return flags;
}

void bnxt_re_unlock_cqs(struct bnxt_re_qp *qp,
                        unsigned long flags)
        __releases(&qp->scq->cq_lock) __releases(&qp->rcq->cq_lock)
{
        if (qp->rcq != qp->scq)
                spin_unlock(&qp->rcq->cq_lock);
        else
                __release(&qp->rcq->cq_lock);
        spin_unlock_irqrestore(&qp->scq->cq_lock, flags);
}

static int bnxt_re_destroy_gsi_sqp(struct bnxt_re_qp *qp)
{
        struct bnxt_re_qp *gsi_sqp;
        struct bnxt_re_ah *gsi_sah;
        struct bnxt_re_dev *rdev;
        int rc = 0;

        rdev = qp->rdev;
        gsi_sqp = rdev->gsi_ctx.gsi_sqp;
        gsi_sah = rdev->gsi_ctx.gsi_sah;

        ibdev_dbg(&rdev->ibdev, "Destroy the shadow AH\n");
        bnxt_qplib_destroy_ah(&rdev->qplib_res,
                              &gsi_sah->qplib_ah,
                              true);
        bnxt_qplib_clean_qp(&qp->qplib_qp);

        ibdev_dbg(&rdev->ibdev, "Destroy the shadow QP\n");
        rc = bnxt_qplib_destroy_qp(&rdev->qplib_res, &gsi_sqp->qplib_qp);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Destroy Shadow QP failed");
                goto fail;
        }
        bnxt_qplib_free_qp_res(&rdev->qplib_res, &gsi_sqp->qplib_qp);

        /* remove from active qp list */
        mutex_lock(&rdev->qp_lock);
        list_del(&gsi_sqp->list);
        mutex_unlock(&rdev->qp_lock);
        atomic_dec(&rdev->qp_count);

        kfree(rdev->gsi_ctx.sqp_tbl);
        kfree(gsi_sah);
        kfree(gsi_sqp);
        rdev->gsi_ctx.gsi_sqp = NULL;
        rdev->gsi_ctx.gsi_sah = NULL;
        rdev->gsi_ctx.sqp_tbl = NULL;

        return 0;
fail:
        return rc;
}

/* Queue Pairs */
int bnxt_re_destroy_qp(struct ib_qp *ib_qp, struct ib_udata *udata)
{
        struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
        struct bnxt_re_dev *rdev = qp->rdev;
        unsigned int flags;
        int rc;

        bnxt_qplib_flush_cqn_wq(&qp->qplib_qp);

        rc = bnxt_qplib_destroy_qp(&rdev->qplib_res, &qp->qplib_qp);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Failed to destroy HW QP");
                return rc;
        }

        if (rdma_is_kernel_res(&qp->ib_qp.res)) {
                flags = bnxt_re_lock_cqs(qp);
                bnxt_qplib_clean_qp(&qp->qplib_qp);
                bnxt_re_unlock_cqs(qp, flags);
        }

        bnxt_qplib_free_qp_res(&rdev->qplib_res, &qp->qplib_qp);

        if (ib_qp->qp_type == IB_QPT_GSI && rdev->gsi_ctx.gsi_sqp) {
                rc = bnxt_re_destroy_gsi_sqp(qp);
                if (rc)
                        goto sh_fail;
        }

        mutex_lock(&rdev->qp_lock);
        list_del(&qp->list);
        mutex_unlock(&rdev->qp_lock);
        atomic_dec(&rdev->qp_count);

        ib_umem_release(qp->rumem);
        ib_umem_release(qp->sumem);

        kfree(qp);
        return 0;
sh_fail:
        return rc;
}

static u8 __from_ib_qp_type(enum ib_qp_type type)
{
        switch (type) {
        case IB_QPT_GSI:
                return CMDQ_CREATE_QP1_TYPE_GSI;
        case IB_QPT_RC:
                return CMDQ_CREATE_QP_TYPE_RC;
        case IB_QPT_UD:
                return CMDQ_CREATE_QP_TYPE_UD;
        default:
                return IB_QPT_MAX;
        }
}

static u16 bnxt_re_setup_rwqe_size(struct bnxt_qplib_qp *qplqp,
                                   int rsge, int max)
{
        if (qplqp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC)
                rsge = max;
        return bnxt_re_get_rwqe_size(rsge);
}

static u16 bnxt_re_get_wqe_size(int ilsize, int nsge)
{
        u16 wqe_size, calc_ils;

        wqe_size = bnxt_re_get_swqe_size(nsge);
        if (ilsize) {
                calc_ils = sizeof(struct sq_send_hdr) + ilsize;
                wqe_size = max_t(u16, calc_ils, wqe_size);
                wqe_size = ALIGN(wqe_size, sizeof(struct sq_send_hdr));
        }
        return wqe_size;
}

static int bnxt_re_setup_swqe_size(struct bnxt_re_qp *qp,
                                   struct ib_qp_init_attr *init_attr)
{
        struct bnxt_qplib_dev_attr *dev_attr;
        struct bnxt_qplib_qp *qplqp;
        struct bnxt_re_dev *rdev;
        struct bnxt_qplib_q *sq;
        int align, ilsize;

        rdev = qp->rdev;
        qplqp = &qp->qplib_qp;
        sq = &qplqp->sq;
        dev_attr = &rdev->dev_attr;

        align = sizeof(struct sq_send_hdr);
        ilsize = ALIGN(init_attr->cap.max_inline_data, align);

        sq->wqe_size = bnxt_re_get_wqe_size(ilsize, sq->max_sge);
        if (sq->wqe_size > bnxt_re_get_swqe_size(dev_attr->max_qp_sges))
                return -EINVAL;
        /* For gen p4 and gen p5 backward compatibility mode
         * wqe size is fixed to 128 bytes
         */
        if (sq->wqe_size < bnxt_re_get_swqe_size(dev_attr->max_qp_sges) &&
                        qplqp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC)
                sq->wqe_size = bnxt_re_get_swqe_size(dev_attr->max_qp_sges);

        if (init_attr->cap.max_inline_data) {
                qplqp->max_inline_data = sq->wqe_size -
                        sizeof(struct sq_send_hdr);
                init_attr->cap.max_inline_data = qplqp->max_inline_data;
                if (qplqp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC)
                        sq->max_sge = qplqp->max_inline_data /
                                sizeof(struct sq_sge);
        }

        return 0;
}

static int bnxt_re_init_user_qp(struct bnxt_re_dev *rdev, struct bnxt_re_pd *pd,
                                struct bnxt_re_qp *qp, struct ib_udata *udata)
{
        struct bnxt_qplib_qp *qplib_qp;
        struct bnxt_re_ucontext *cntx;
        struct bnxt_re_qp_req ureq;
        int bytes = 0, psn_sz;
        struct ib_umem *umem;
        int psn_nume;

        qplib_qp = &qp->qplib_qp;
        cntx = rdma_udata_to_drv_context(udata, struct bnxt_re_ucontext,
                                         ib_uctx);
        if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
                return -EFAULT;

        bytes = (qplib_qp->sq.max_wqe * qplib_qp->sq.wqe_size);
        /* Consider mapping PSN search memory only for RC QPs. */
        if (qplib_qp->type == CMDQ_CREATE_QP_TYPE_RC) {
                psn_sz = bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx) ?
                                                   sizeof(struct sq_psn_search_ext) :
                                                   sizeof(struct sq_psn_search);
                psn_nume = (qplib_qp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC) ?
                            qplib_qp->sq.max_wqe :
                            ((qplib_qp->sq.max_wqe * qplib_qp->sq.wqe_size) /
                              sizeof(struct bnxt_qplib_sge));
                bytes += (psn_nume * psn_sz);
        }

        bytes = PAGE_ALIGN(bytes);
        umem = ib_umem_get(&rdev->ibdev, ureq.qpsva, bytes,
                           IB_ACCESS_LOCAL_WRITE);
        if (IS_ERR(umem))
                return PTR_ERR(umem);

        qp->sumem = umem;
        qplib_qp->sq.sg_info.umem = umem;
        qplib_qp->sq.sg_info.pgsize = PAGE_SIZE;
        qplib_qp->sq.sg_info.pgshft = PAGE_SHIFT;
        qplib_qp->qp_handle = ureq.qp_handle;

        if (!qp->qplib_qp.srq) {
                bytes = (qplib_qp->rq.max_wqe * qplib_qp->rq.wqe_size);
                bytes = PAGE_ALIGN(bytes);
                umem = ib_umem_get(&rdev->ibdev, ureq.qprva, bytes,
                                   IB_ACCESS_LOCAL_WRITE);
                if (IS_ERR(umem))
                        goto rqfail;
                qp->rumem = umem;
                qplib_qp->rq.sg_info.umem = umem;
                qplib_qp->rq.sg_info.pgsize = PAGE_SIZE;
                qplib_qp->rq.sg_info.pgshft = PAGE_SHIFT;
        }

        qplib_qp->dpi = &cntx->dpi;
        return 0;
rqfail:
        ib_umem_release(qp->sumem);
        qp->sumem = NULL;
        memset(&qplib_qp->sq.sg_info, 0, sizeof(qplib_qp->sq.sg_info));

        return PTR_ERR(umem);
}

static struct bnxt_re_ah *bnxt_re_create_shadow_qp_ah
                                (struct bnxt_re_pd *pd,
                                 struct bnxt_qplib_res *qp1_res,
                                 struct bnxt_qplib_qp *qp1_qp)
{
        struct bnxt_re_dev *rdev = pd->rdev;
        struct bnxt_re_ah *ah;
        union ib_gid sgid;
        int rc;

        ah = kzalloc(sizeof(*ah), GFP_KERNEL);
        if (!ah)
                return NULL;

        ah->rdev = rdev;
        ah->qplib_ah.pd = &pd->qplib_pd;

        rc = bnxt_re_query_gid(&rdev->ibdev, 1, 0, &sgid);
        if (rc)
                goto fail;

        /* supply the dgid data same as sgid */
        memcpy(ah->qplib_ah.dgid.data, &sgid.raw,
               sizeof(union ib_gid));
        ah->qplib_ah.sgid_index = 0;

        ah->qplib_ah.traffic_class = 0;
        ah->qplib_ah.flow_label = 0;

        ah->qplib_ah.hop_limit = 1;
        ah->qplib_ah.sl = 0;
        /* Have DMAC same as SMAC */
        ether_addr_copy(ah->qplib_ah.dmac, rdev->netdev->dev_addr);

        rc = bnxt_qplib_create_ah(&rdev->qplib_res, &ah->qplib_ah, false);
        if (rc) {
                ibdev_err(&rdev->ibdev,
                          "Failed to allocate HW AH for Shadow QP");
                goto fail;
        }

        return ah;

fail:
        kfree(ah);
        return NULL;
}

static struct bnxt_re_qp *bnxt_re_create_shadow_qp
                                (struct bnxt_re_pd *pd,
                                 struct bnxt_qplib_res *qp1_res,
                                 struct bnxt_qplib_qp *qp1_qp)
{
        struct bnxt_re_dev *rdev = pd->rdev;
        struct bnxt_re_qp *qp;
        int rc;

        qp = kzalloc(sizeof(*qp), GFP_KERNEL);
        if (!qp)
                return NULL;

        qp->rdev = rdev;

        /* Initialize the shadow QP structure from the QP1 values */
        ether_addr_copy(qp->qplib_qp.smac, rdev->netdev->dev_addr);

        qp->qplib_qp.pd = &pd->qplib_pd;
        qp->qplib_qp.qp_handle = (u64)(unsigned long)(&qp->qplib_qp);
        qp->qplib_qp.type = IB_QPT_UD;

        qp->qplib_qp.max_inline_data = 0;
        qp->qplib_qp.sig_type = true;

        /* Shadow QP SQ depth should be same as QP1 RQ depth */
        qp->qplib_qp.sq.wqe_size = bnxt_re_get_wqe_size(0, 6);
        qp->qplib_qp.sq.max_wqe = qp1_qp->rq.max_wqe;
        qp->qplib_qp.sq.max_sge = 2;
        /* Q full delta can be 1 since it is internal QP */
        qp->qplib_qp.sq.q_full_delta = 1;
        qp->qplib_qp.sq.sg_info.pgsize = PAGE_SIZE;
        qp->qplib_qp.sq.sg_info.pgshft = PAGE_SHIFT;

        qp->qplib_qp.scq = qp1_qp->scq;
        qp->qplib_qp.rcq = qp1_qp->rcq;

        qp->qplib_qp.rq.wqe_size = bnxt_re_get_rwqe_size(6);
        qp->qplib_qp.rq.max_wqe = qp1_qp->rq.max_wqe;
        qp->qplib_qp.rq.max_sge = qp1_qp->rq.max_sge;
        /* Q full delta can be 1 since it is internal QP */
        qp->qplib_qp.rq.q_full_delta = 1;
        qp->qplib_qp.rq.sg_info.pgsize = PAGE_SIZE;
        qp->qplib_qp.rq.sg_info.pgshft = PAGE_SHIFT;

        qp->qplib_qp.mtu = qp1_qp->mtu;

        qp->qplib_qp.sq_hdr_buf_size = 0;
        qp->qplib_qp.rq_hdr_buf_size = BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6;
        qp->qplib_qp.dpi = &rdev->dpi_privileged;

        rc = bnxt_qplib_create_qp(qp1_res, &qp->qplib_qp);
        if (rc)
                goto fail;

        spin_lock_init(&qp->sq_lock);
        INIT_LIST_HEAD(&qp->list);
        mutex_lock(&rdev->qp_lock);
        list_add_tail(&qp->list, &rdev->qp_list);
        atomic_inc(&rdev->qp_count);
        mutex_unlock(&rdev->qp_lock);
        return qp;
fail:
        kfree(qp);
        return NULL;
}

static int bnxt_re_init_rq_attr(struct bnxt_re_qp *qp,
                                struct ib_qp_init_attr *init_attr)
{
        struct bnxt_qplib_dev_attr *dev_attr;
        struct bnxt_qplib_qp *qplqp;
        struct bnxt_re_dev *rdev;
        struct bnxt_qplib_q *rq;
        int entries;

        rdev = qp->rdev;
        qplqp = &qp->qplib_qp;
        rq = &qplqp->rq;
        dev_attr = &rdev->dev_attr;

        if (init_attr->srq) {
                struct bnxt_re_srq *srq;

                srq = container_of(init_attr->srq, struct bnxt_re_srq, ib_srq);
                qplqp->srq = &srq->qplib_srq;
                rq->max_wqe = 0;
        } else {
                rq->max_sge = init_attr->cap.max_recv_sge;
                if (rq->max_sge > dev_attr->max_qp_sges)
                        rq->max_sge = dev_attr->max_qp_sges;
                init_attr->cap.max_recv_sge = rq->max_sge;
                rq->wqe_size = bnxt_re_setup_rwqe_size(qplqp, rq->max_sge,
                                                       dev_attr->max_qp_sges);
                /* Allocate 1 more than what's provided so posting max doesn't
                 * mean empty.
                 */
                entries = roundup_pow_of_two(init_attr->cap.max_recv_wr + 1);
                rq->max_wqe = min_t(u32, entries, dev_attr->max_qp_wqes + 1);
                rq->q_full_delta = 0;
                rq->sg_info.pgsize = PAGE_SIZE;
                rq->sg_info.pgshft = PAGE_SHIFT;
        }

        return 0;
}

static void bnxt_re_adjust_gsi_rq_attr(struct bnxt_re_qp *qp)
{
        struct bnxt_qplib_dev_attr *dev_attr;
        struct bnxt_qplib_qp *qplqp;
        struct bnxt_re_dev *rdev;

        rdev = qp->rdev;
        qplqp = &qp->qplib_qp;
        dev_attr = &rdev->dev_attr;

        if (!bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx)) {
                qplqp->rq.max_sge = dev_attr->max_qp_sges;
                if (qplqp->rq.max_sge > dev_attr->max_qp_sges)
                        qplqp->rq.max_sge = dev_attr->max_qp_sges;
                qplqp->rq.max_sge = 6;
        }
}

static int bnxt_re_init_sq_attr(struct bnxt_re_qp *qp,
                                struct ib_qp_init_attr *init_attr,
                                struct ib_udata *udata)
{
        struct bnxt_qplib_dev_attr *dev_attr;
        struct bnxt_qplib_qp *qplqp;
        struct bnxt_re_dev *rdev;
        struct bnxt_qplib_q *sq;
        int entries;
        int diff;
        int rc;

        rdev = qp->rdev;
        qplqp = &qp->qplib_qp;
        sq = &qplqp->sq;
        dev_attr = &rdev->dev_attr;

        sq->max_sge = init_attr->cap.max_send_sge;
        if (sq->max_sge > dev_attr->max_qp_sges) {
                sq->max_sge = dev_attr->max_qp_sges;
                init_attr->cap.max_send_sge = sq->max_sge;
        }

        rc = bnxt_re_setup_swqe_size(qp, init_attr);
        if (rc)
                return rc;

        entries = init_attr->cap.max_send_wr;
        /* Allocate 128 + 1 more than what's provided */
        diff = (qplqp->wqe_mode == BNXT_QPLIB_WQE_MODE_VARIABLE) ?
                0 : BNXT_QPLIB_RESERVED_QP_WRS;
        entries = roundup_pow_of_two(entries + diff + 1);
        sq->max_wqe = min_t(u32, entries, dev_attr->max_qp_wqes + diff + 1);
        sq->q_full_delta = diff + 1;
        /*
         * Reserving one slot for Phantom WQE. Application can
         * post one extra entry in this case. But allowing this to avoid
         * unexpected Queue full condition
         */
        qplqp->sq.q_full_delta -= 1;
        qplqp->sq.sg_info.pgsize = PAGE_SIZE;
        qplqp->sq.sg_info.pgshft = PAGE_SHIFT;

        return 0;
}

static void bnxt_re_adjust_gsi_sq_attr(struct bnxt_re_qp *qp,
                                       struct ib_qp_init_attr *init_attr)
{
        struct bnxt_qplib_dev_attr *dev_attr;
        struct bnxt_qplib_qp *qplqp;
        struct bnxt_re_dev *rdev;
        int entries;

        rdev = qp->rdev;
        qplqp = &qp->qplib_qp;
        dev_attr = &rdev->dev_attr;

        if (!bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx)) {
                entries = roundup_pow_of_two(init_attr->cap.max_send_wr + 1);
                qplqp->sq.max_wqe = min_t(u32, entries,
                                          dev_attr->max_qp_wqes + 1);
                qplqp->sq.q_full_delta = qplqp->sq.max_wqe -
                        init_attr->cap.max_send_wr;
                qplqp->sq.max_sge++; /* Need one extra sge to put UD header */
                if (qplqp->sq.max_sge > dev_attr->max_qp_sges)
                        qplqp->sq.max_sge = dev_attr->max_qp_sges;
        }
}

static int bnxt_re_init_qp_type(struct bnxt_re_dev *rdev,
                                struct ib_qp_init_attr *init_attr)
{
        struct bnxt_qplib_chip_ctx *chip_ctx;
        int qptype;

        chip_ctx = rdev->chip_ctx;

        qptype = __from_ib_qp_type(init_attr->qp_type);
        if (qptype == IB_QPT_MAX) {
                ibdev_err(&rdev->ibdev, "QP type 0x%x not supported", qptype);
                qptype = -EOPNOTSUPP;
                goto out;
        }

        if (bnxt_qplib_is_chip_gen_p5(chip_ctx) &&
            init_attr->qp_type == IB_QPT_GSI)
                qptype = CMDQ_CREATE_QP_TYPE_GSI;
out:
        return qptype;
}

static int bnxt_re_init_qp_attr(struct bnxt_re_qp *qp, struct bnxt_re_pd *pd,
                                struct ib_qp_init_attr *init_attr,
                                struct ib_udata *udata)
{
        struct bnxt_qplib_dev_attr *dev_attr;
        struct bnxt_qplib_qp *qplqp;
        struct bnxt_re_dev *rdev;
        struct bnxt_re_cq *cq;
        int rc = 0, qptype;

        rdev = qp->rdev;
        qplqp = &qp->qplib_qp;
        dev_attr = &rdev->dev_attr;

        /* Setup misc params */
        ether_addr_copy(qplqp->smac, rdev->netdev->dev_addr);
        qplqp->pd = &pd->qplib_pd;
        qplqp->qp_handle = (u64)qplqp;
        qplqp->max_inline_data = init_attr->cap.max_inline_data;
        qplqp->sig_type = ((init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ?
                            true : false);
        qptype = bnxt_re_init_qp_type(rdev, init_attr);
        if (qptype < 0) {
                rc = qptype;
                goto out;
        }
        qplqp->type = (u8)qptype;
        qplqp->wqe_mode = rdev->chip_ctx->modes.wqe_mode;

        if (init_attr->qp_type == IB_QPT_RC) {
                qplqp->max_rd_atomic = dev_attr->max_qp_rd_atom;
                qplqp->max_dest_rd_atomic = dev_attr->max_qp_init_rd_atom;
        }
        qplqp->mtu = ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
        qplqp->dpi = &rdev->dpi_privileged; /* Doorbell page */
        if (init_attr->create_flags) {
                ibdev_dbg(&rdev->ibdev,
                          "QP create flags 0x%x not supported",
                          init_attr->create_flags);
                return -EOPNOTSUPP;
        }

        /* Setup CQs */
        if (init_attr->send_cq) {
                cq = container_of(init_attr->send_cq, struct bnxt_re_cq, ib_cq);
                qplqp->scq = &cq->qplib_cq;
                qp->scq = cq;
        }

        if (init_attr->recv_cq) {
                cq = container_of(init_attr->recv_cq, struct bnxt_re_cq, ib_cq);
                qplqp->rcq = &cq->qplib_cq;
                qp->rcq = cq;
        }

        /* Setup RQ/SRQ */
        rc = bnxt_re_init_rq_attr(qp, init_attr);
        if (rc)
                goto out;
        if (init_attr->qp_type == IB_QPT_GSI)
                bnxt_re_adjust_gsi_rq_attr(qp);

        /* Setup SQ */
        rc = bnxt_re_init_sq_attr(qp, init_attr, udata);
        if (rc)
                goto out;
        if (init_attr->qp_type == IB_QPT_GSI)
                bnxt_re_adjust_gsi_sq_attr(qp, init_attr);

        if (udata) /* This will update DPI and qp_handle */
                rc = bnxt_re_init_user_qp(rdev, pd, qp, udata);
out:
        return rc;
}

static int bnxt_re_create_shadow_gsi(struct bnxt_re_qp *qp,
                                     struct bnxt_re_pd *pd)
{
        struct bnxt_re_sqp_entries *sqp_tbl = NULL;
        struct bnxt_re_dev *rdev;
        struct bnxt_re_qp *sqp;
        struct bnxt_re_ah *sah;
        int rc = 0;

        rdev = qp->rdev;
        /* Create a shadow QP to handle the QP1 traffic */
        sqp_tbl = kzalloc(sizeof(*sqp_tbl) * BNXT_RE_MAX_GSI_SQP_ENTRIES,
                          GFP_KERNEL);
        if (!sqp_tbl)
                return -ENOMEM;
        rdev->gsi_ctx.sqp_tbl = sqp_tbl;

        sqp = bnxt_re_create_shadow_qp(pd, &rdev->qplib_res, &qp->qplib_qp);
        if (!sqp) {
                rc = -ENODEV;
                ibdev_err(&rdev->ibdev, "Failed to create Shadow QP for QP1");
                goto out;
        }
        rdev->gsi_ctx.gsi_sqp = sqp;

        sqp->rcq = qp->rcq;
        sqp->scq = qp->scq;
        sah = bnxt_re_create_shadow_qp_ah(pd, &rdev->qplib_res,
                                          &qp->qplib_qp);
        if (!sah) {
                bnxt_qplib_destroy_qp(&rdev->qplib_res,
                                      &sqp->qplib_qp);
                rc = -ENODEV;
                ibdev_err(&rdev->ibdev,
                          "Failed to create AH entry for ShadowQP");
                goto out;
        }
        rdev->gsi_ctx.gsi_sah = sah;

        return 0;
out:
        kfree(sqp_tbl);
        return rc;
}

static int bnxt_re_create_gsi_qp(struct bnxt_re_qp *qp, struct bnxt_re_pd *pd,
                                 struct ib_qp_init_attr *init_attr)
{
        struct bnxt_re_dev *rdev;
        struct bnxt_qplib_qp *qplqp;
        int rc = 0;

        rdev = qp->rdev;
        qplqp = &qp->qplib_qp;

        qplqp->rq_hdr_buf_size = BNXT_QPLIB_MAX_QP1_RQ_HDR_SIZE_V2;
        qplqp->sq_hdr_buf_size = BNXT_QPLIB_MAX_QP1_SQ_HDR_SIZE_V2;

        rc = bnxt_qplib_create_qp1(&rdev->qplib_res, qplqp);
        if (rc) {
                ibdev_err(&rdev->ibdev, "create HW QP1 failed!");
                goto out;
        }

        rc = bnxt_re_create_shadow_gsi(qp, pd);
out:
        return rc;
}

static bool bnxt_re_test_qp_limits(struct bnxt_re_dev *rdev,
                                   struct ib_qp_init_attr *init_attr,
                                   struct bnxt_qplib_dev_attr *dev_attr)
{
        bool rc = true;

        if (init_attr->cap.max_send_wr > dev_attr->max_qp_wqes ||
            init_attr->cap.max_recv_wr > dev_attr->max_qp_wqes ||
            init_attr->cap.max_send_sge > dev_attr->max_qp_sges ||
            init_attr->cap.max_recv_sge > dev_attr->max_qp_sges ||
            init_attr->cap.max_inline_data > dev_attr->max_inline_data) {
                ibdev_err(&rdev->ibdev,
                          "Create QP failed - max exceeded! 0x%x/0x%x 0x%x/0x%x 0x%x/0x%x 0x%x/0x%x 0x%x/0x%x",
                          init_attr->cap.max_send_wr, dev_attr->max_qp_wqes,
                          init_attr->cap.max_recv_wr, dev_attr->max_qp_wqes,
                          init_attr->cap.max_send_sge, dev_attr->max_qp_sges,
                          init_attr->cap.max_recv_sge, dev_attr->max_qp_sges,
                          init_attr->cap.max_inline_data,
                          dev_attr->max_inline_data);
                rc = false;
        }
        return rc;
}

struct ib_qp *bnxt_re_create_qp(struct ib_pd *ib_pd,
                                struct ib_qp_init_attr *qp_init_attr,
                                struct ib_udata *udata)
{
        struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
        struct bnxt_re_dev *rdev = pd->rdev;
        struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
        struct bnxt_re_qp *qp;
        int rc;

        rc = bnxt_re_test_qp_limits(rdev, qp_init_attr, dev_attr);
        if (!rc) {
                rc = -EINVAL;
                goto exit;
        }

        qp = kzalloc(sizeof(*qp), GFP_KERNEL);
        if (!qp) {
                rc = -ENOMEM;
                goto exit;
        }
        qp->rdev = rdev;
        rc = bnxt_re_init_qp_attr(qp, pd, qp_init_attr, udata);
        if (rc)
                goto fail;

        if (qp_init_attr->qp_type == IB_QPT_GSI &&
            !(bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx))) {
                rc = bnxt_re_create_gsi_qp(qp, pd, qp_init_attr);
                if (rc == -ENODEV)
                        goto qp_destroy;
                if (rc)
                        goto fail;
        } else {
                rc = bnxt_qplib_create_qp(&rdev->qplib_res, &qp->qplib_qp);
                if (rc) {
                        ibdev_err(&rdev->ibdev, "Failed to create HW QP");
                        goto free_umem;
                }
                if (udata) {
                        struct bnxt_re_qp_resp resp;

                        resp.qpid = qp->qplib_qp.id;
                        resp.rsvd = 0;
                        rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
                        if (rc) {
                                ibdev_err(&rdev->ibdev, "Failed to copy QP udata");
                                goto qp_destroy;
                        }
                }
        }

        qp->ib_qp.qp_num = qp->qplib_qp.id;
        if (qp_init_attr->qp_type == IB_QPT_GSI)
                rdev->gsi_ctx.gsi_qp = qp;
        spin_lock_init(&qp->sq_lock);
        spin_lock_init(&qp->rq_lock);
        INIT_LIST_HEAD(&qp->list);
        mutex_lock(&rdev->qp_lock);
        list_add_tail(&qp->list, &rdev->qp_list);
        mutex_unlock(&rdev->qp_lock);
        atomic_inc(&rdev->qp_count);

        return &qp->ib_qp;
qp_destroy:
        bnxt_qplib_destroy_qp(&rdev->qplib_res, &qp->qplib_qp);
free_umem:
        ib_umem_release(qp->rumem);
        ib_umem_release(qp->sumem);
fail:
        kfree(qp);
exit:
        return ERR_PTR(rc);
}

static u8 __from_ib_qp_state(enum ib_qp_state state)
{
        switch (state) {
        case IB_QPS_RESET:
                return CMDQ_MODIFY_QP_NEW_STATE_RESET;
        case IB_QPS_INIT:
                return CMDQ_MODIFY_QP_NEW_STATE_INIT;
        case IB_QPS_RTR:
                return CMDQ_MODIFY_QP_NEW_STATE_RTR;
        case IB_QPS_RTS:
                return CMDQ_MODIFY_QP_NEW_STATE_RTS;
        case IB_QPS_SQD:
                return CMDQ_MODIFY_QP_NEW_STATE_SQD;
        case IB_QPS_SQE:
                return CMDQ_MODIFY_QP_NEW_STATE_SQE;
        case IB_QPS_ERR:
        default:
                return CMDQ_MODIFY_QP_NEW_STATE_ERR;
        }
}

static enum ib_qp_state __to_ib_qp_state(u8 state)
{
        switch (state) {
        case CMDQ_MODIFY_QP_NEW_STATE_RESET:
                return IB_QPS_RESET;
        case CMDQ_MODIFY_QP_NEW_STATE_INIT:
                return IB_QPS_INIT;
        case CMDQ_MODIFY_QP_NEW_STATE_RTR:
                return IB_QPS_RTR;
        case CMDQ_MODIFY_QP_NEW_STATE_RTS:
                return IB_QPS_RTS;
        case CMDQ_MODIFY_QP_NEW_STATE_SQD:
                return IB_QPS_SQD;
        case CMDQ_MODIFY_QP_NEW_STATE_SQE:
                return IB_QPS_SQE;
        case CMDQ_MODIFY_QP_NEW_STATE_ERR:
        default:
                return IB_QPS_ERR;
        }
}

static u32 __from_ib_mtu(enum ib_mtu mtu)
{
        switch (mtu) {
        case IB_MTU_256:
                return CMDQ_MODIFY_QP_PATH_MTU_MTU_256;
        case IB_MTU_512:
                return CMDQ_MODIFY_QP_PATH_MTU_MTU_512;
        case IB_MTU_1024:
                return CMDQ_MODIFY_QP_PATH_MTU_MTU_1024;
        case IB_MTU_2048:
                return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
        case IB_MTU_4096:
                return CMDQ_MODIFY_QP_PATH_MTU_MTU_4096;
        default:
                return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
        }
}

static enum ib_mtu __to_ib_mtu(u32 mtu)
{
        switch (mtu & CREQ_QUERY_QP_RESP_SB_PATH_MTU_MASK) {
        case CMDQ_MODIFY_QP_PATH_MTU_MTU_256:
                return IB_MTU_256;
        case CMDQ_MODIFY_QP_PATH_MTU_MTU_512:
                return IB_MTU_512;
        case CMDQ_MODIFY_QP_PATH_MTU_MTU_1024:
                return IB_MTU_1024;
        case CMDQ_MODIFY_QP_PATH_MTU_MTU_2048:
                return IB_MTU_2048;
        case CMDQ_MODIFY_QP_PATH_MTU_MTU_4096:
                return IB_MTU_4096;
        default:
                return IB_MTU_2048;
        }
}

/* Shared Receive Queues */
int bnxt_re_destroy_srq(struct ib_srq *ib_srq, struct ib_udata *udata)
{
        struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
                                               ib_srq);
        struct bnxt_re_dev *rdev = srq->rdev;
        struct bnxt_qplib_srq *qplib_srq = &srq->qplib_srq;
        struct bnxt_qplib_nq *nq = NULL;

        if (qplib_srq->cq)
                nq = qplib_srq->cq->nq;
        bnxt_qplib_destroy_srq(&rdev->qplib_res, qplib_srq);
        ib_umem_release(srq->umem);
        atomic_dec(&rdev->srq_count);
        if (nq)
                nq->budget--;
        return 0;
}

static int bnxt_re_init_user_srq(struct bnxt_re_dev *rdev,
                                 struct bnxt_re_pd *pd,
                                 struct bnxt_re_srq *srq,
                                 struct ib_udata *udata)
{
        struct bnxt_re_srq_req ureq;
        struct bnxt_qplib_srq *qplib_srq = &srq->qplib_srq;
        struct ib_umem *umem;
        int bytes = 0;
        struct bnxt_re_ucontext *cntx = rdma_udata_to_drv_context(
                udata, struct bnxt_re_ucontext, ib_uctx);

        if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
                return -EFAULT;

        bytes = (qplib_srq->max_wqe * qplib_srq->wqe_size);
        bytes = PAGE_ALIGN(bytes);
        umem = ib_umem_get(&rdev->ibdev, ureq.srqva, bytes,
                           IB_ACCESS_LOCAL_WRITE);
        if (IS_ERR(umem))
                return PTR_ERR(umem);

        srq->umem = umem;
        qplib_srq->sg_info.umem = umem;
        qplib_srq->sg_info.pgsize = PAGE_SIZE;
        qplib_srq->sg_info.pgshft = PAGE_SHIFT;
        qplib_srq->srq_handle = ureq.srq_handle;
        qplib_srq->dpi = &cntx->dpi;

        return 0;
}

int bnxt_re_create_srq(struct ib_srq *ib_srq,
                       struct ib_srq_init_attr *srq_init_attr,
                       struct ib_udata *udata)
{
        struct bnxt_qplib_dev_attr *dev_attr;
        struct bnxt_qplib_nq *nq = NULL;
        struct bnxt_re_dev *rdev;
        struct bnxt_re_srq *srq;
        struct bnxt_re_pd *pd;
        struct ib_pd *ib_pd;
        int rc, entries;

        ib_pd = ib_srq->pd;
        pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
        rdev = pd->rdev;
        dev_attr = &rdev->dev_attr;
        srq = container_of(ib_srq, struct bnxt_re_srq, ib_srq);

        if (srq_init_attr->attr.max_wr >= dev_attr->max_srq_wqes) {
                ibdev_err(&rdev->ibdev, "Create CQ failed - max exceeded");
                rc = -EINVAL;
                goto exit;
        }

        if (srq_init_attr->srq_type != IB_SRQT_BASIC) {
                rc = -EOPNOTSUPP;
                goto exit;
        }

        srq->rdev = rdev;
        srq->qplib_srq.pd = &pd->qplib_pd;
        srq->qplib_srq.dpi = &rdev->dpi_privileged;
        /* Allocate 1 more than what's provided so posting max doesn't
         * mean empty
         */
        entries = roundup_pow_of_two(srq_init_attr->attr.max_wr + 1);
        if (entries > dev_attr->max_srq_wqes + 1)
                entries = dev_attr->max_srq_wqes + 1;
        srq->qplib_srq.max_wqe = entries;

        srq->qplib_srq.max_sge = srq_init_attr->attr.max_sge;
         /* 128 byte wqe size for SRQ . So use max sges */
        srq->qplib_srq.wqe_size = bnxt_re_get_rwqe_size(dev_attr->max_srq_sges);
        srq->qplib_srq.threshold = srq_init_attr->attr.srq_limit;
        srq->srq_limit = srq_init_attr->attr.srq_limit;
        srq->qplib_srq.eventq_hw_ring_id = rdev->nq[0].ring_id;
        nq = &rdev->nq[0];

        if (udata) {
                rc = bnxt_re_init_user_srq(rdev, pd, srq, udata);
                if (rc)
                        goto fail;
        }

        rc = bnxt_qplib_create_srq(&rdev->qplib_res, &srq->qplib_srq);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Create HW SRQ failed!");
                goto fail;
        }

        if (udata) {
                struct bnxt_re_srq_resp resp;

                resp.srqid = srq->qplib_srq.id;
                rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
                if (rc) {
                        ibdev_err(&rdev->ibdev, "SRQ copy to udata failed!");
                        bnxt_qplib_destroy_srq(&rdev->qplib_res,
                                               &srq->qplib_srq);
                        goto fail;
                }
        }
        if (nq)
                nq->budget++;
        atomic_inc(&rdev->srq_count);
        spin_lock_init(&srq->lock);

        return 0;

fail:
        ib_umem_release(srq->umem);
exit:
        return rc;
}

int bnxt_re_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr,
                       enum ib_srq_attr_mask srq_attr_mask,
                       struct ib_udata *udata)
{
        struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
                                               ib_srq);
        struct bnxt_re_dev *rdev = srq->rdev;
        int rc;

        switch (srq_attr_mask) {
        case IB_SRQ_MAX_WR:
                /* SRQ resize is not supported */
                break;
        case IB_SRQ_LIMIT:
                /* Change the SRQ threshold */
                if (srq_attr->srq_limit > srq->qplib_srq.max_wqe)
                        return -EINVAL;

                srq->qplib_srq.threshold = srq_attr->srq_limit;
                rc = bnxt_qplib_modify_srq(&rdev->qplib_res, &srq->qplib_srq);
                if (rc) {
                        ibdev_err(&rdev->ibdev, "Modify HW SRQ failed!");
                        return rc;
                }
                /* On success, update the shadow */
                srq->srq_limit = srq_attr->srq_limit;
                /* No need to Build and send response back to udata */
                break;
        default:
                ibdev_err(&rdev->ibdev,
                          "Unsupported srq_attr_mask 0x%x", srq_attr_mask);
                return -EINVAL;
        }
        return 0;
}

int bnxt_re_query_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr)
{
        struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
                                               ib_srq);
        struct bnxt_re_srq tsrq;
        struct bnxt_re_dev *rdev = srq->rdev;
        int rc;

        /* Get live SRQ attr */
        tsrq.qplib_srq.id = srq->qplib_srq.id;
        rc = bnxt_qplib_query_srq(&rdev->qplib_res, &tsrq.qplib_srq);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Query HW SRQ failed!");
                return rc;
        }
        srq_attr->max_wr = srq->qplib_srq.max_wqe;
        srq_attr->max_sge = srq->qplib_srq.max_sge;
        srq_attr->srq_limit = tsrq.qplib_srq.threshold;

        return 0;
}

int bnxt_re_post_srq_recv(struct ib_srq *ib_srq, const struct ib_recv_wr *wr,
                          const struct ib_recv_wr **bad_wr)
{
        struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
                                               ib_srq);
        struct bnxt_qplib_swqe wqe;
        unsigned long flags;
        int rc = 0;

        spin_lock_irqsave(&srq->lock, flags);
        while (wr) {
                /* Transcribe each ib_recv_wr to qplib_swqe */
                wqe.num_sge = wr->num_sge;
                bnxt_re_build_sgl(wr->sg_list, wqe.sg_list, wr->num_sge);
                wqe.wr_id = wr->wr_id;
                wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;

                rc = bnxt_qplib_post_srq_recv(&srq->qplib_srq, &wqe);
                if (rc) {
                        *bad_wr = wr;
                        break;
                }
                wr = wr->next;
        }
        spin_unlock_irqrestore(&srq->lock, flags);

        return rc;
}
static int bnxt_re_modify_shadow_qp(struct bnxt_re_dev *rdev,
                                    struct bnxt_re_qp *qp1_qp,
                                    int qp_attr_mask)
{
        struct bnxt_re_qp *qp = rdev->gsi_ctx.gsi_sqp;
        int rc = 0;

        if (qp_attr_mask & IB_QP_STATE) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_STATE;
                qp->qplib_qp.state = qp1_qp->qplib_qp.state;
        }
        if (qp_attr_mask & IB_QP_PKEY_INDEX) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_PKEY;
                qp->qplib_qp.pkey_index = qp1_qp->qplib_qp.pkey_index;
        }

        if (qp_attr_mask & IB_QP_QKEY) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_QKEY;
                /* Using a Random  QKEY */
                qp->qplib_qp.qkey = 0x81818181;
        }
        if (qp_attr_mask & IB_QP_SQ_PSN) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_SQ_PSN;
                qp->qplib_qp.sq.psn = qp1_qp->qplib_qp.sq.psn;
        }

        rc = bnxt_qplib_modify_qp(&rdev->qplib_res, &qp->qplib_qp);
        if (rc)
                ibdev_err(&rdev->ibdev, "Failed to modify Shadow QP for QP1");
        return rc;
}

int bnxt_re_modify_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
                      int qp_attr_mask, struct ib_udata *udata)
{
        struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
        struct bnxt_re_dev *rdev = qp->rdev;
        struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
        enum ib_qp_state curr_qp_state, new_qp_state;
        int rc, entries;
        unsigned int flags;
        u8 nw_type;

        if (qp_attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
                return -EOPNOTSUPP;

        qp->qplib_qp.modify_flags = 0;
        if (qp_attr_mask & IB_QP_STATE) {
                curr_qp_state = __to_ib_qp_state(qp->qplib_qp.cur_qp_state);
                new_qp_state = qp_attr->qp_state;
                if (!ib_modify_qp_is_ok(curr_qp_state, new_qp_state,
                                        ib_qp->qp_type, qp_attr_mask)) {
                        ibdev_err(&rdev->ibdev,
                                  "Invalid attribute mask: %#x specified ",
                                  qp_attr_mask);
                        ibdev_err(&rdev->ibdev,
                                  "for qpn: %#x type: %#x",
                                  ib_qp->qp_num, ib_qp->qp_type);
                        ibdev_err(&rdev->ibdev,
                                  "curr_qp_state=0x%x, new_qp_state=0x%x\n",
                                  curr_qp_state, new_qp_state);
                        return -EINVAL;
                }
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_STATE;
                qp->qplib_qp.state = __from_ib_qp_state(qp_attr->qp_state);

                if (!qp->sumem &&
                    qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
                        ibdev_dbg(&rdev->ibdev,
                                  "Move QP = %p to flush list\n", qp);
                        flags = bnxt_re_lock_cqs(qp);
                        bnxt_qplib_add_flush_qp(&qp->qplib_qp);
                        bnxt_re_unlock_cqs(qp, flags);
                }
                if (!qp->sumem &&
                    qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_RESET) {
                        ibdev_dbg(&rdev->ibdev,
                                  "Move QP = %p out of flush list\n", qp);
                        flags = bnxt_re_lock_cqs(qp);
                        bnxt_qplib_clean_qp(&qp->qplib_qp);
                        bnxt_re_unlock_cqs(qp, flags);
                }
        }
        if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
                qp->qplib_qp.modify_flags |=
                                CMDQ_MODIFY_QP_MODIFY_MASK_EN_SQD_ASYNC_NOTIFY;
                qp->qplib_qp.en_sqd_async_notify = true;
        }
        if (qp_attr_mask & IB_QP_ACCESS_FLAGS) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_ACCESS;
                qp->qplib_qp.access =
                        __from_ib_access_flags(qp_attr->qp_access_flags);
                /* LOCAL_WRITE access must be set to allow RC receive */
                qp->qplib_qp.access |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
                /* Temp: Set all params on QP as of now */
                qp->qplib_qp.access |= CMDQ_MODIFY_QP_ACCESS_REMOTE_WRITE;
                qp->qplib_qp.access |= CMDQ_MODIFY_QP_ACCESS_REMOTE_READ;
        }
        if (qp_attr_mask & IB_QP_PKEY_INDEX) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_PKEY;
                qp->qplib_qp.pkey_index = qp_attr->pkey_index;
        }
        if (qp_attr_mask & IB_QP_QKEY) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_QKEY;
                qp->qplib_qp.qkey = qp_attr->qkey;
        }
        if (qp_attr_mask & IB_QP_AV) {
                const struct ib_global_route *grh =
                        rdma_ah_read_grh(&qp_attr->ah_attr);
                const struct ib_gid_attr *sgid_attr;
                struct bnxt_re_gid_ctx *ctx;

                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_DGID |
                                     CMDQ_MODIFY_QP_MODIFY_MASK_FLOW_LABEL |
                                     CMDQ_MODIFY_QP_MODIFY_MASK_SGID_INDEX |
                                     CMDQ_MODIFY_QP_MODIFY_MASK_HOP_LIMIT |
                                     CMDQ_MODIFY_QP_MODIFY_MASK_TRAFFIC_CLASS |
                                     CMDQ_MODIFY_QP_MODIFY_MASK_DEST_MAC |
                                     CMDQ_MODIFY_QP_MODIFY_MASK_VLAN_ID;
                memcpy(qp->qplib_qp.ah.dgid.data, grh->dgid.raw,
                       sizeof(qp->qplib_qp.ah.dgid.data));
                qp->qplib_qp.ah.flow_label = grh->flow_label;
                sgid_attr = grh->sgid_attr;
                /* Get the HW context of the GID. The reference
                 * of GID table entry is already taken by the caller.
                 */
                ctx = rdma_read_gid_hw_context(sgid_attr);
                qp->qplib_qp.ah.sgid_index = ctx->idx;
                qp->qplib_qp.ah.host_sgid_index = grh->sgid_index;
                qp->qplib_qp.ah.hop_limit = grh->hop_limit;
                qp->qplib_qp.ah.traffic_class = grh->traffic_class;
                qp->qplib_qp.ah.sl = rdma_ah_get_sl(&qp_attr->ah_attr);
                ether_addr_copy(qp->qplib_qp.ah.dmac,
                                qp_attr->ah_attr.roce.dmac);

                rc = rdma_read_gid_l2_fields(sgid_attr, NULL,
                                             &qp->qplib_qp.smac[0]);
                if (rc)
                        return rc;

                nw_type = rdma_gid_attr_network_type(sgid_attr);
                switch (nw_type) {
                case RDMA_NETWORK_IPV4:
                        qp->qplib_qp.nw_type =
                                CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV2_IPV4;
                        break;
                case RDMA_NETWORK_IPV6:
                        qp->qplib_qp.nw_type =
                                CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV2_IPV6;
                        break;
                default:
                        qp->qplib_qp.nw_type =
                                CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV1;
                        break;
                }
        }

        if (qp_attr_mask & IB_QP_PATH_MTU) {
                qp->qplib_qp.modify_flags |=
                                CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
                qp->qplib_qp.path_mtu = __from_ib_mtu(qp_attr->path_mtu);
                qp->qplib_qp.mtu = ib_mtu_enum_to_int(qp_attr->path_mtu);
        } else if (qp_attr->qp_state == IB_QPS_RTR) {
                qp->qplib_qp.modify_flags |=
                        CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
                qp->qplib_qp.path_mtu =
                        __from_ib_mtu(iboe_get_mtu(rdev->netdev->mtu));
                qp->qplib_qp.mtu =
                        ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
        }

        if (qp_attr_mask & IB_QP_TIMEOUT) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_TIMEOUT;
                qp->qplib_qp.timeout = qp_attr->timeout;
        }
        if (qp_attr_mask & IB_QP_RETRY_CNT) {
                qp->qplib_qp.modify_flags |=
                                CMDQ_MODIFY_QP_MODIFY_MASK_RETRY_CNT;
                qp->qplib_qp.retry_cnt = qp_attr->retry_cnt;
        }
        if (qp_attr_mask & IB_QP_RNR_RETRY) {
                qp->qplib_qp.modify_flags |=
                                CMDQ_MODIFY_QP_MODIFY_MASK_RNR_RETRY;
                qp->qplib_qp.rnr_retry = qp_attr->rnr_retry;
        }
        if (qp_attr_mask & IB_QP_MIN_RNR_TIMER) {
                qp->qplib_qp.modify_flags |=
                                CMDQ_MODIFY_QP_MODIFY_MASK_MIN_RNR_TIMER;
                qp->qplib_qp.min_rnr_timer = qp_attr->min_rnr_timer;
        }
        if (qp_attr_mask & IB_QP_RQ_PSN) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_RQ_PSN;
                qp->qplib_qp.rq.psn = qp_attr->rq_psn;
        }
        if (qp_attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
                qp->qplib_qp.modify_flags |=
                                CMDQ_MODIFY_QP_MODIFY_MASK_MAX_RD_ATOMIC;
                /* Cap the max_rd_atomic to device max */
                qp->qplib_qp.max_rd_atomic = min_t(u32, qp_attr->max_rd_atomic,
                                                   dev_attr->max_qp_rd_atom);
        }
        if (qp_attr_mask & IB_QP_SQ_PSN) {
                qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_SQ_PSN;
                qp->qplib_qp.sq.psn = qp_attr->sq_psn;
        }
        if (qp_attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
                if (qp_attr->max_dest_rd_atomic >
                    dev_attr->max_qp_init_rd_atom) {
                        ibdev_err(&rdev->ibdev,
                                  "max_dest_rd_atomic requested%d is > dev_max%d",
                                  qp_attr->max_dest_rd_atomic,
                                  dev_attr->max_qp_init_rd_atom);
                        return -EINVAL;
                }

                qp->qplib_qp.modify_flags |=
                                CMDQ_MODIFY_QP_MODIFY_MASK_MAX_DEST_RD_ATOMIC;
                qp->qplib_qp.max_dest_rd_atomic = qp_attr->max_dest_rd_atomic;
        }
        if (qp_attr_mask & IB_QP_CAP) {
                qp->qplib_qp.modify_flags |=

                                CMDQ_MODIFY_QP_MODIFY_MASK_SQ_SIZE |
                                CMDQ_MODIFY_QP_MODIFY_MASK_RQ_SIZE |
                                CMDQ_MODIFY_QP_MODIFY_MASK_SQ_SGE |
                                CMDQ_MODIFY_QP_MODIFY_MASK_RQ_SGE |
                                CMDQ_MODIFY_QP_MODIFY_MASK_MAX_INLINE_DATA;
                if ((qp_attr->cap.max_send_wr >= dev_attr->max_qp_wqes) ||
                    (qp_attr->cap.max_recv_wr >= dev_attr->max_qp_wqes) ||
                    (qp_attr->cap.max_send_sge >= dev_attr->max_qp_sges) ||
                    (qp_attr->cap.max_recv_sge >= dev_attr->max_qp_sges) ||
                    (qp_attr->cap.max_inline_data >=
                                                dev_attr->max_inline_data)) {
                        ibdev_err(&rdev->ibdev,
                                  "Create QP failed - max exceeded");
                        return -EINVAL;
                }
                entries = roundup_pow_of_two(qp_attr->cap.max_send_wr);
                qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
                                                dev_attr->max_qp_wqes + 1);
                qp->qplib_qp.sq.q_full_delta = qp->qplib_qp.sq.max_wqe -
                                                qp_attr->cap.max_send_wr;
                /*
                 * Reserving one slot for Phantom WQE. Some application can
                 * post one extra entry in this case. Allowing this to avoid
                 * unexpected Queue full condition
                 */
                qp->qplib_qp.sq.q_full_delta -= 1;
                qp->qplib_qp.sq.max_sge = qp_attr->cap.max_send_sge;
                if (qp->qplib_qp.rq.max_wqe) {
                        entries = roundup_pow_of_two(qp_attr->cap.max_recv_wr);
                        qp->qplib_qp.rq.max_wqe =
                                min_t(u32, entries, dev_attr->max_qp_wqes + 1);
                        qp->qplib_qp.rq.q_full_delta = qp->qplib_qp.rq.max_wqe -
                                                       qp_attr->cap.max_recv_wr;
                        qp->qplib_qp.rq.max_sge = qp_attr->cap.max_recv_sge;
                } else {
                        /* SRQ was used prior, just ignore the RQ caps */
                }
        }
        if (qp_attr_mask & IB_QP_DEST_QPN) {
                qp->qplib_qp.modify_flags |=
                                CMDQ_MODIFY_QP_MODIFY_MASK_DEST_QP_ID;
                qp->qplib_qp.dest_qpn = qp_attr->dest_qp_num;
        }
        rc = bnxt_qplib_modify_qp(&rdev->qplib_res, &qp->qplib_qp);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Failed to modify HW QP");
                return rc;
        }
        if (ib_qp->qp_type == IB_QPT_GSI && rdev->gsi_ctx.gsi_sqp)
                rc = bnxt_re_modify_shadow_qp(rdev, qp, qp_attr_mask);
        return rc;
}

int bnxt_re_query_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
                     int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
{
        struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
        struct bnxt_re_dev *rdev = qp->rdev;
        struct bnxt_qplib_qp *qplib_qp;
        int rc;

        qplib_qp = kzalloc(sizeof(*qplib_qp), GFP_KERNEL);
        if (!qplib_qp)
                return -ENOMEM;

        qplib_qp->id = qp->qplib_qp.id;
        qplib_qp->ah.host_sgid_index = qp->qplib_qp.ah.host_sgid_index;

        rc = bnxt_qplib_query_qp(&rdev->qplib_res, qplib_qp);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Failed to query HW QP");
                goto out;
        }
        qp_attr->qp_state = __to_ib_qp_state(qplib_qp->state);
        qp_attr->cur_qp_state = __to_ib_qp_state(qplib_qp->cur_qp_state);
        qp_attr->en_sqd_async_notify = qplib_qp->en_sqd_async_notify ? 1 : 0;
        qp_attr->qp_access_flags = __to_ib_access_flags(qplib_qp->access);
        qp_attr->pkey_index = qplib_qp->pkey_index;
        qp_attr->qkey = qplib_qp->qkey;
        qp_attr->ah_attr.type = RDMA_AH_ATTR_TYPE_ROCE;
        rdma_ah_set_grh(&qp_attr->ah_attr, NULL, qplib_qp->ah.flow_label,
                        qplib_qp->ah.host_sgid_index,
                        qplib_qp->ah.hop_limit,
                        qplib_qp->ah.traffic_class);
        rdma_ah_set_dgid_raw(&qp_attr->ah_attr, qplib_qp->ah.dgid.data);
        rdma_ah_set_sl(&qp_attr->ah_attr, qplib_qp->ah.sl);
        ether_addr_copy(qp_attr->ah_attr.roce.dmac, qplib_qp->ah.dmac);
        qp_attr->path_mtu = __to_ib_mtu(qplib_qp->path_mtu);
        qp_attr->timeout = qplib_qp->timeout;
        qp_attr->retry_cnt = qplib_qp->retry_cnt;
        qp_attr->rnr_retry = qplib_qp->rnr_retry;
        qp_attr->min_rnr_timer = qplib_qp->min_rnr_timer;
        qp_attr->rq_psn = qplib_qp->rq.psn;
        qp_attr->max_rd_atomic = qplib_qp->max_rd_atomic;
        qp_attr->sq_psn = qplib_qp->sq.psn;
        qp_attr->max_dest_rd_atomic = qplib_qp->max_dest_rd_atomic;
        qp_init_attr->sq_sig_type = qplib_qp->sig_type ? IB_SIGNAL_ALL_WR :
                                                         IB_SIGNAL_REQ_WR;
        qp_attr->dest_qp_num = qplib_qp->dest_qpn;

        qp_attr->cap.max_send_wr = qp->qplib_qp.sq.max_wqe;
        qp_attr->cap.max_send_sge = qp->qplib_qp.sq.max_sge;
        qp_attr->cap.max_recv_wr = qp->qplib_qp.rq.max_wqe;
        qp_attr->cap.max_recv_sge = qp->qplib_qp.rq.max_sge;
        qp_attr->cap.max_inline_data = qp->qplib_qp.max_inline_data;
        qp_init_attr->cap = qp_attr->cap;

out:
        kfree(qplib_qp);
        return rc;
}

/* Routine for sending QP1 packets for RoCE V1 an V2
 */
static int bnxt_re_build_qp1_send_v2(struct bnxt_re_qp *qp,
                                     const struct ib_send_wr *wr,
                                     struct bnxt_qplib_swqe *wqe,
                                     int payload_size)
{
        struct bnxt_re_ah *ah = container_of(ud_wr(wr)->ah, struct bnxt_re_ah,
                                             ib_ah);
        struct bnxt_qplib_ah *qplib_ah = &ah->qplib_ah;
        const struct ib_gid_attr *sgid_attr = ah->ib_ah.sgid_attr;
        struct bnxt_qplib_sge sge;
        u8 nw_type;
        u16 ether_type;
        union ib_gid dgid;
        bool is_eth = false;
        bool is_vlan = false;
        bool is_grh = false;
        bool is_udp = false;
        u8 ip_version = 0;
        u16 vlan_id = 0xFFFF;
        void *buf;
        int i, rc = 0;

        memset(&qp->qp1_hdr, 0, sizeof(qp->qp1_hdr));

        rc = rdma_read_gid_l2_fields(sgid_attr, &vlan_id, NULL);
        if (rc)
                return rc;

        /* Get network header type for this GID */
        nw_type = rdma_gid_attr_network_type(sgid_attr);
        switch (nw_type) {
        case RDMA_NETWORK_IPV4:
                nw_type = BNXT_RE_ROCEV2_IPV4_PACKET;
                break;
        case RDMA_NETWORK_IPV6:
                nw_type = BNXT_RE_ROCEV2_IPV6_PACKET;
                break;
        default:
                nw_type = BNXT_RE_ROCE_V1_PACKET;
                break;
        }
        memcpy(&dgid.raw, &qplib_ah->dgid, 16);
        is_udp = sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP;
        if (is_udp) {
                if (ipv6_addr_v4mapped((struct in6_addr *)&sgid_attr->gid)) {
                        ip_version = 4;
                        ether_type = ETH_P_IP;
                } else {
                        ip_version = 6;
                        ether_type = ETH_P_IPV6;
                }
                is_grh = false;
        } else {
                ether_type = ETH_P_IBOE;
                is_grh = true;
        }

        is_eth = true;
        is_vlan = (vlan_id && (vlan_id < 0x1000)) ? true : false;

        ib_ud_header_init(payload_size, !is_eth, is_eth, is_vlan, is_grh,
                          ip_version, is_udp, 0, &qp->qp1_hdr);

        /* ETH */
        ether_addr_copy(qp->qp1_hdr.eth.dmac_h, ah->qplib_ah.dmac);
        ether_addr_copy(qp->qp1_hdr.eth.smac_h, qp->qplib_qp.smac);

        /* For vlan, check the sgid for vlan existence */

        if (!is_vlan) {
                qp->qp1_hdr.eth.type = cpu_to_be16(ether_type);
        } else {
                qp->qp1_hdr.vlan.type = cpu_to_be16(ether_type);
                qp->qp1_hdr.vlan.tag = cpu_to_be16(vlan_id);
        }

        if (is_grh || (ip_version == 6)) {
                memcpy(qp->qp1_hdr.grh.source_gid.raw, sgid_attr->gid.raw,
                       sizeof(sgid_attr->gid));
                memcpy(qp->qp1_hdr.grh.destination_gid.raw, qplib_ah->dgid.data,
                       sizeof(sgid_attr->gid));
                qp->qp1_hdr.grh.hop_limit     = qplib_ah->hop_limit;
        }

        if (ip_version == 4) {
                qp->qp1_hdr.ip4.tos = 0;
                qp->qp1_hdr.ip4.id = 0;
                qp->qp1_hdr.ip4.frag_off = htons(IP_DF);
                qp->qp1_hdr.ip4.ttl = qplib_ah->hop_limit;

                memcpy(&qp->qp1_hdr.ip4.saddr, sgid_attr->gid.raw + 12, 4);
                memcpy(&qp->qp1_hdr.ip4.daddr, qplib_ah->dgid.data + 12, 4);
                qp->qp1_hdr.ip4.check = ib_ud_ip4_csum(&qp->qp1_hdr);
        }

        if (is_udp) {
                qp->qp1_hdr.udp.dport = htons(ROCE_V2_UDP_DPORT);
                qp->qp1_hdr.udp.sport = htons(0x8CD1);
                qp->qp1_hdr.udp.csum = 0;
        }

        /* BTH */
        if (wr->opcode == IB_WR_SEND_WITH_IMM) {
                qp->qp1_hdr.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
                qp->qp1_hdr.immediate_present = 1;
        } else {
                qp->qp1_hdr.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
        }
        if (wr->send_flags & IB_SEND_SOLICITED)
                qp->qp1_hdr.bth.solicited_event = 1;
        /* pad_count */
        qp->qp1_hdr.bth.pad_count = (4 - payload_size) & 3;

        /* P_key for QP1 is for all members */
        qp->qp1_hdr.bth.pkey = cpu_to_be16(0xFFFF);
        qp->qp1_hdr.bth.destination_qpn = IB_QP1;
        qp->qp1_hdr.bth.ack_req = 0;
        qp->send_psn++;
        qp->send_psn &= BTH_PSN_MASK;
        qp->qp1_hdr.bth.psn = cpu_to_be32(qp->send_psn);
        /* DETH */
        /* Use the priviledged Q_Key for QP1 */
        qp->qp1_hdr.deth.qkey = cpu_to_be32(IB_QP1_QKEY);
        qp->qp1_hdr.deth.source_qpn = IB_QP1;

        /* Pack the QP1 to the transmit buffer */
        buf = bnxt_qplib_get_qp1_sq_buf(&qp->qplib_qp, &sge);
        if (buf) {
                ib_ud_header_pack(&qp->qp1_hdr, buf);
                for (i = wqe->num_sge; i; i--) {
                        wqe->sg_list[i].addr = wqe->sg_list[i - 1].addr;
                        wqe->sg_list[i].lkey = wqe->sg_list[i - 1].lkey;
                        wqe->sg_list[i].size = wqe->sg_list[i - 1].size;
                }

                /*
                 * Max Header buf size for IPV6 RoCE V2 is 86,
                 * which is same as the QP1 SQ header buffer.
                 * Header buf size for IPV4 RoCE V2 can be 66.
                 * ETH(14) + VLAN(4)+ IP(20) + UDP (8) + BTH(20).
                 * Subtract 20 bytes from QP1 SQ header buf size
                 */
                if (is_udp && ip_version == 4)
                        sge.size -= 20;
                /*
                 * Max Header buf size for RoCE V1 is 78.
                 * ETH(14) + VLAN(4) + GRH(40) + BTH(20).
                 * Subtract 8 bytes from QP1 SQ header buf size
                 */
                if (!is_udp)
                        sge.size -= 8;

                /* Subtract 4 bytes for non vlan packets */
                if (!is_vlan)
                        sge.size -= 4;

                wqe->sg_list[0].addr = sge.addr;
                wqe->sg_list[0].lkey = sge.lkey;
                wqe->sg_list[0].size = sge.size;
                wqe->num_sge++;

        } else {
                ibdev_err(&qp->rdev->ibdev, "QP1 buffer is empty!");
                rc = -ENOMEM;
        }
        return rc;
}

/* For the MAD layer, it only provides the recv SGE the size of
 * ib_grh + MAD datagram.  No Ethernet headers, Ethertype, BTH, DETH,
 * nor RoCE iCRC.  The Cu+ solution must provide buffer for the entire
 * receive packet (334 bytes) with no VLAN and then copy the GRH
 * and the MAD datagram out to the provided SGE.
 */
static int bnxt_re_build_qp1_shadow_qp_recv(struct bnxt_re_qp *qp,
                                            const struct ib_recv_wr *wr,
                                            struct bnxt_qplib_swqe *wqe,
                                            int payload_size)
{
        struct bnxt_re_sqp_entries *sqp_entry;
        struct bnxt_qplib_sge ref, sge;
        struct bnxt_re_dev *rdev;
        u32 rq_prod_index;

        rdev = qp->rdev;

        rq_prod_index = bnxt_qplib_get_rq_prod_index(&qp->qplib_qp);

        if (!bnxt_qplib_get_qp1_rq_buf(&qp->qplib_qp, &sge))
                return -ENOMEM;

        /* Create 1 SGE to receive the entire
         * ethernet packet
         */
        /* Save the reference from ULP */
        ref.addr = wqe->sg_list[0].addr;
        ref.lkey = wqe->sg_list[0].lkey;
        ref.size = wqe->sg_list[0].size;

        sqp_entry = &rdev->gsi_ctx.sqp_tbl[rq_prod_index];

        /* SGE 1 */
        wqe->sg_list[0].addr = sge.addr;
        wqe->sg_list[0].lkey = sge.lkey;
        wqe->sg_list[0].size = BNXT_QPLIB_MAX_QP1_RQ_HDR_SIZE_V2;
        sge.size -= wqe->sg_list[0].size;

        sqp_entry->sge.addr = ref.addr;
        sqp_entry->sge.lkey = ref.lkey;
        sqp_entry->sge.size = ref.size;
        /* Store the wrid for reporting completion */
        sqp_entry->wrid = wqe->wr_id;
        /* change the wqe->wrid to table index */
        wqe->wr_id = rq_prod_index;
        return 0;
}

static int is_ud_qp(struct bnxt_re_qp *qp)
{
        return (qp->qplib_qp.type == CMDQ_CREATE_QP_TYPE_UD ||
                qp->qplib_qp.type == CMDQ_CREATE_QP_TYPE_GSI);
}

static int bnxt_re_build_send_wqe(struct bnxt_re_qp *qp,
                                  const struct ib_send_wr *wr,
                                  struct bnxt_qplib_swqe *wqe)
{
        struct bnxt_re_ah *ah = NULL;

        if (is_ud_qp(qp)) {
                ah = container_of(ud_wr(wr)->ah, struct bnxt_re_ah, ib_ah);
                wqe->send.q_key = ud_wr(wr)->remote_qkey;
                wqe->send.dst_qp = ud_wr(wr)->remote_qpn;
                wqe->send.avid = ah->qplib_ah.id;
        }
        switch (wr->opcode) {
        case IB_WR_SEND:
                wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND;
                break;
        case IB_WR_SEND_WITH_IMM:
                wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM;
                wqe->send.imm_data = wr->ex.imm_data;
                break;
        case IB_WR_SEND_WITH_INV:
                wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV;
                wqe->send.inv_key = wr->ex.invalidate_rkey;
                break;
        default:
                return -EINVAL;
        }
        if (wr->send_flags & IB_SEND_SIGNALED)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
        if (wr->send_flags & IB_SEND_FENCE)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
        if (wr->send_flags & IB_SEND_SOLICITED)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
        if (wr->send_flags & IB_SEND_INLINE)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_INLINE;

        return 0;
}

static int bnxt_re_build_rdma_wqe(const struct ib_send_wr *wr,
                                  struct bnxt_qplib_swqe *wqe)
{
        switch (wr->opcode) {
        case IB_WR_RDMA_WRITE:
                wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE;
                break;
        case IB_WR_RDMA_WRITE_WITH_IMM:
                wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM;
                wqe->rdma.imm_data = wr->ex.imm_data;
                break;
        case IB_WR_RDMA_READ:
                wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_READ;
                wqe->rdma.inv_key = wr->ex.invalidate_rkey;
                break;
        default:
                return -EINVAL;
        }
        wqe->rdma.remote_va = rdma_wr(wr)->remote_addr;
        wqe->rdma.r_key = rdma_wr(wr)->rkey;
        if (wr->send_flags & IB_SEND_SIGNALED)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
        if (wr->send_flags & IB_SEND_FENCE)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
        if (wr->send_flags & IB_SEND_SOLICITED)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
        if (wr->send_flags & IB_SEND_INLINE)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_INLINE;

        return 0;
}

static int bnxt_re_build_atomic_wqe(const struct ib_send_wr *wr,
                                    struct bnxt_qplib_swqe *wqe)
{
        switch (wr->opcode) {
        case IB_WR_ATOMIC_CMP_AND_SWP:
                wqe->type = BNXT_QPLIB_SWQE_TYPE_ATOMIC_CMP_AND_SWP;
                wqe->atomic.cmp_data = atomic_wr(wr)->compare_add;
                wqe->atomic.swap_data = atomic_wr(wr)->swap;
                break;
        case IB_WR_ATOMIC_FETCH_AND_ADD:
                wqe->type = BNXT_QPLIB_SWQE_TYPE_ATOMIC_FETCH_AND_ADD;
                wqe->atomic.cmp_data = atomic_wr(wr)->compare_add;
                break;
        default:
                return -EINVAL;
        }
        wqe->atomic.remote_va = atomic_wr(wr)->remote_addr;
        wqe->atomic.r_key = atomic_wr(wr)->rkey;
        if (wr->send_flags & IB_SEND_SIGNALED)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
        if (wr->send_flags & IB_SEND_FENCE)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
        if (wr->send_flags & IB_SEND_SOLICITED)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
        return 0;
}

static int bnxt_re_build_inv_wqe(const struct ib_send_wr *wr,
                                 struct bnxt_qplib_swqe *wqe)
{
        wqe->type = BNXT_QPLIB_SWQE_TYPE_LOCAL_INV;
        wqe->local_inv.inv_l_key = wr->ex.invalidate_rkey;

        /* Need unconditional fence for local invalidate
         * opcode to work as expected.
         */
        wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;

        if (wr->send_flags & IB_SEND_SIGNALED)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
        if (wr->send_flags & IB_SEND_SOLICITED)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;

        return 0;
}

static int bnxt_re_build_reg_wqe(const struct ib_reg_wr *wr,
                                 struct bnxt_qplib_swqe *wqe)
{
        struct bnxt_re_mr *mr = container_of(wr->mr, struct bnxt_re_mr, ib_mr);
        struct bnxt_qplib_frpl *qplib_frpl = &mr->qplib_frpl;
        int access = wr->access;

        wqe->frmr.pbl_ptr = (__le64 *)qplib_frpl->hwq.pbl_ptr[0];
        wqe->frmr.pbl_dma_ptr = qplib_frpl->hwq.pbl_dma_ptr[0];
        wqe->frmr.page_list = mr->pages;
        wqe->frmr.page_list_len = mr->npages;
        wqe->frmr.levels = qplib_frpl->hwq.level;
        wqe->type = BNXT_QPLIB_SWQE_TYPE_REG_MR;

        /* Need unconditional fence for reg_mr
         * opcode to function as expected.
         */

        wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;

        if (wr->wr.send_flags & IB_SEND_SIGNALED)
                wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;

        if (access & IB_ACCESS_LOCAL_WRITE)
                wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_LOCAL_WRITE;
        if (access & IB_ACCESS_REMOTE_READ)
                wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_READ;
        if (access & IB_ACCESS_REMOTE_WRITE)
                wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_WRITE;
        if (access & IB_ACCESS_REMOTE_ATOMIC)
                wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_ATOMIC;
        if (access & IB_ACCESS_MW_BIND)
                wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_WINDOW_BIND;

        wqe->frmr.l_key = wr->key;
        wqe->frmr.length = wr->mr->length;
        wqe->frmr.pbl_pg_sz_log = (wr->mr->page_size >> PAGE_SHIFT_4K) - 1;
        wqe->frmr.va = wr->mr->iova;
        return 0;
}

static int bnxt_re_copy_inline_data(struct bnxt_re_dev *rdev,
                                    const struct ib_send_wr *wr,
                                    struct bnxt_qplib_swqe *wqe)
{
        /*  Copy the inline data to the data  field */
        u8 *in_data;
        u32 i, sge_len;
        void *sge_addr;

        in_data = wqe->inline_data;
        for (i = 0; i < wr->num_sge; i++) {
                sge_addr = (void *)(unsigned long)
                                wr->sg_list[i].addr;
                sge_len = wr->sg_list[i].length;

                if ((sge_len + wqe->inline_len) >
                    BNXT_QPLIB_SWQE_MAX_INLINE_LENGTH) {
                        ibdev_err(&rdev->ibdev,
                                  "Inline data size requested > supported value");
                        return -EINVAL;
                }
                sge_len = wr->sg_list[i].length;

                memcpy(in_data, sge_addr, sge_len);
                in_data += wr->sg_list[i].length;
                wqe->inline_len += wr->sg_list[i].length;
        }
        return wqe->inline_len;
}

static int bnxt_re_copy_wr_payload(struct bnxt_re_dev *rdev,
                                   const struct ib_send_wr *wr,
                                   struct bnxt_qplib_swqe *wqe)
{
        int payload_sz = 0;

        if (wr->send_flags & IB_SEND_INLINE)
                payload_sz = bnxt_re_copy_inline_data(rdev, wr, wqe);
        else
                payload_sz = bnxt_re_build_sgl(wr->sg_list, wqe->sg_list,
                                               wqe->num_sge);

        return payload_sz;
}

static void bnxt_ud_qp_hw_stall_workaround(struct bnxt_re_qp *qp)
{
        if ((qp->ib_qp.qp_type == IB_QPT_UD ||
             qp->ib_qp.qp_type == IB_QPT_GSI ||
             qp->ib_qp.qp_type == IB_QPT_RAW_ETHERTYPE) &&
             qp->qplib_qp.wqe_cnt == BNXT_RE_UD_QP_HW_STALL) {
                int qp_attr_mask;
                struct ib_qp_attr qp_attr;

                qp_attr_mask = IB_QP_STATE;
                qp_attr.qp_state = IB_QPS_RTS;
                bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, qp_attr_mask, NULL);
                qp->qplib_qp.wqe_cnt = 0;
        }
}

static int bnxt_re_post_send_shadow_qp(struct bnxt_re_dev *rdev,
                                       struct bnxt_re_qp *qp,
                                       const struct ib_send_wr *wr)
{
        int rc = 0, payload_sz = 0;
        unsigned long flags;

        spin_lock_irqsave(&qp->sq_lock, flags);
        while (wr) {
                struct bnxt_qplib_swqe wqe = {};

                /* Common */
                wqe.num_sge = wr->num_sge;
                if (wr->num_sge > qp->qplib_qp.sq.max_sge) {
                        ibdev_err(&rdev->ibdev,
                                  "Limit exceeded for Send SGEs");
                        rc = -EINVAL;
                        goto bad;
                }

                payload_sz = bnxt_re_copy_wr_payload(qp->rdev, wr, &wqe);
                if (payload_sz < 0) {
                        rc = -EINVAL;
                        goto bad;
                }
                wqe.wr_id = wr->wr_id;

                wqe.type = BNXT_QPLIB_SWQE_TYPE_SEND;

                rc = bnxt_re_build_send_wqe(qp, wr, &wqe);
                if (!rc)
                        rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
bad:
                if (rc) {
                        ibdev_err(&rdev->ibdev,
                                  "Post send failed opcode = %#x rc = %d",
                                  wr->opcode, rc);
                        break;
                }
                wr = wr->next;
        }
        bnxt_qplib_post_send_db(&qp->qplib_qp);
        bnxt_ud_qp_hw_stall_workaround(qp);
        spin_unlock_irqrestore(&qp->sq_lock, flags);
        return rc;
}

int bnxt_re_post_send(struct ib_qp *ib_qp, const struct ib_send_wr *wr,
                      const struct ib_send_wr **bad_wr)
{
        struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
        struct bnxt_qplib_swqe wqe;
        int rc = 0, payload_sz = 0;
        unsigned long flags;

        spin_lock_irqsave(&qp->sq_lock, flags);
        while (wr) {
                /* House keeping */
                memset(&wqe, 0, sizeof(wqe));

                /* Common */
                wqe.num_sge = wr->num_sge;
                if (wr->num_sge > qp->qplib_qp.sq.max_sge) {
                        ibdev_err(&qp->rdev->ibdev,
                                  "Limit exceeded for Send SGEs");
                        rc = -EINVAL;
                        goto bad;
                }

                payload_sz = bnxt_re_copy_wr_payload(qp->rdev, wr, &wqe);
                if (payload_sz < 0) {
                        rc = -EINVAL;
                        goto bad;
                }
                wqe.wr_id = wr->wr_id;

                switch (wr->opcode) {
                case IB_WR_SEND:
                case IB_WR_SEND_WITH_IMM:
                        if (qp->qplib_qp.type == CMDQ_CREATE_QP1_TYPE_GSI) {
                                rc = bnxt_re_build_qp1_send_v2(qp, wr, &wqe,
                                                               payload_sz);
                                if (rc)
                                        goto bad;
                                wqe.rawqp1.lflags |=
                                        SQ_SEND_RAWETH_QP1_LFLAGS_ROCE_CRC;
                        }
                        switch (wr->send_flags) {
                        case IB_SEND_IP_CSUM:
                                wqe.rawqp1.lflags |=
                                        SQ_SEND_RAWETH_QP1_LFLAGS_IP_CHKSUM;
                                break;
                        default:
                                break;
                        }
                        fallthrough;
                case IB_WR_SEND_WITH_INV:
                        rc = bnxt_re_build_send_wqe(qp, wr, &wqe);
                        break;
                case IB_WR_RDMA_WRITE:
                case IB_WR_RDMA_WRITE_WITH_IMM:
                case IB_WR_RDMA_READ:
                        rc = bnxt_re_build_rdma_wqe(wr, &wqe);
                        break;
                case IB_WR_ATOMIC_CMP_AND_SWP:
                case IB_WR_ATOMIC_FETCH_AND_ADD:
                        rc = bnxt_re_build_atomic_wqe(wr, &wqe);
                        break;
                case IB_WR_RDMA_READ_WITH_INV:
                        ibdev_err(&qp->rdev->ibdev,
                                  "RDMA Read with Invalidate is not supported");
                        rc = -EINVAL;
                        goto bad;
                case IB_WR_LOCAL_INV:
                        rc = bnxt_re_build_inv_wqe(wr, &wqe);
                        break;
                case IB_WR_REG_MR:
                        rc = bnxt_re_build_reg_wqe(reg_wr(wr), &wqe);
                        break;
                default:
                        /* Unsupported WRs */
                        ibdev_err(&qp->rdev->ibdev,
                                  "WR (%#x) is not supported", wr->opcode);
                        rc = -EINVAL;
                        goto bad;
                }
                if (!rc)
                        rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
bad:
                if (rc) {
                        ibdev_err(&qp->rdev->ibdev,
                                  "post_send failed op:%#x qps = %#x rc = %d\n",
                                  wr->opcode, qp->qplib_qp.state, rc);
                        *bad_wr = wr;
                        break;
                }
                wr = wr->next;
        }
        bnxt_qplib_post_send_db(&qp->qplib_qp);
        bnxt_ud_qp_hw_stall_workaround(qp);
        spin_unlock_irqrestore(&qp->sq_lock, flags);

        return rc;
}

static int bnxt_re_post_recv_shadow_qp(struct bnxt_re_dev *rdev,
                                       struct bnxt_re_qp *qp,
                                       const struct ib_recv_wr *wr)
{
        struct bnxt_qplib_swqe wqe;
        int rc = 0;

        memset(&wqe, 0, sizeof(wqe));
        while (wr) {
                /* House keeping */
                memset(&wqe, 0, sizeof(wqe));

                /* Common */
                wqe.num_sge = wr->num_sge;
                if (wr->num_sge > qp->qplib_qp.rq.max_sge) {
                        ibdev_err(&rdev->ibdev,
                                  "Limit exceeded for Receive SGEs");
                        rc = -EINVAL;
                        break;
                }
                bnxt_re_build_sgl(wr->sg_list, wqe.sg_list, wr->num_sge);
                wqe.wr_id = wr->wr_id;
                wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;

                rc = bnxt_qplib_post_recv(&qp->qplib_qp, &wqe);
                if (rc)
                        break;

                wr = wr->next;
        }
        if (!rc)
                bnxt_qplib_post_recv_db(&qp->qplib_qp);
        return rc;
}

int bnxt_re_post_recv(struct ib_qp *ib_qp, const struct ib_recv_wr *wr,
                      const struct ib_recv_wr **bad_wr)
{
        struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
        struct bnxt_qplib_swqe wqe;
        int rc = 0, payload_sz = 0;
        unsigned long flags;
        u32 count = 0;

        spin_lock_irqsave(&qp->rq_lock, flags);
        while (wr) {
                /* House keeping */
                memset(&wqe, 0, sizeof(wqe));

                /* Common */
                wqe.num_sge = wr->num_sge;
                if (wr->num_sge > qp->qplib_qp.rq.max_sge) {
                        ibdev_err(&qp->rdev->ibdev,
                                  "Limit exceeded for Receive SGEs");
                        rc = -EINVAL;
                        *bad_wr = wr;
                        break;
                }

                payload_sz = bnxt_re_build_sgl(wr->sg_list, wqe.sg_list,
                                               wr->num_sge);
                wqe.wr_id = wr->wr_id;
                wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;

                if (ib_qp->qp_type == IB_QPT_GSI &&
                    qp->qplib_qp.type != CMDQ_CREATE_QP_TYPE_GSI)
                        rc = bnxt_re_build_qp1_shadow_qp_recv(qp, wr, &wqe,
                                                              payload_sz);
                if (!rc)
                        rc = bnxt_qplib_post_recv(&qp->qplib_qp, &wqe);
                if (rc) {
                        *bad_wr = wr;
                        break;
                }

                /* Ring DB if the RQEs posted reaches a threshold value */
                if (++count >= BNXT_RE_RQ_WQE_THRESHOLD) {
                        bnxt_qplib_post_recv_db(&qp->qplib_qp);
                        count = 0;
                }

                wr = wr->next;
        }

        if (count)
                bnxt_qplib_post_recv_db(&qp->qplib_qp);

        spin_unlock_irqrestore(&qp->rq_lock, flags);

        return rc;
}

/* Completion Queues */
int bnxt_re_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
{
        struct bnxt_re_cq *cq;
        struct bnxt_qplib_nq *nq;
        struct bnxt_re_dev *rdev;

        cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
        rdev = cq->rdev;
        nq = cq->qplib_cq.nq;

        bnxt_qplib_destroy_cq(&rdev->qplib_res, &cq->qplib_cq);
        ib_umem_release(cq->umem);

        atomic_dec(&rdev->cq_count);
        nq->budget--;
        kfree(cq->cql);
        return 0;
}

int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
                      struct ib_udata *udata)
{
        struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibcq->device, ibdev);
        struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
        struct bnxt_re_cq *cq = container_of(ibcq, struct bnxt_re_cq, ib_cq);
        int rc, entries;
        int cqe = attr->cqe;
        struct bnxt_qplib_nq *nq = NULL;
        unsigned int nq_alloc_cnt;

        if (attr->flags)
                return -EOPNOTSUPP;

        /* Validate CQ fields */
        if (cqe < 1 || cqe > dev_attr->max_cq_wqes) {
                ibdev_err(&rdev->ibdev, "Failed to create CQ -max exceeded");
                return -EINVAL;
        }

        cq->rdev = rdev;
        cq->qplib_cq.cq_handle = (u64)(unsigned long)(&cq->qplib_cq);

        entries = roundup_pow_of_two(cqe + 1);
        if (entries > dev_attr->max_cq_wqes + 1)
                entries = dev_attr->max_cq_wqes + 1;

        cq->qplib_cq.sg_info.pgsize = PAGE_SIZE;
        cq->qplib_cq.sg_info.pgshft = PAGE_SHIFT;
        if (udata) {
                struct bnxt_re_cq_req req;
                struct bnxt_re_ucontext *uctx = rdma_udata_to_drv_context(
                        udata, struct bnxt_re_ucontext, ib_uctx);
                if (ib_copy_from_udata(&req, udata, sizeof(req))) {
                        rc = -EFAULT;
                        goto fail;
                }

                cq->umem = ib_umem_get(&rdev->ibdev, req.cq_va,
                                       entries * sizeof(struct cq_base),
                                       IB_ACCESS_LOCAL_WRITE);
                if (IS_ERR(cq->umem)) {
                        rc = PTR_ERR(cq->umem);
                        goto fail;
                }
                cq->qplib_cq.sg_info.umem = cq->umem;
                cq->qplib_cq.dpi = &uctx->dpi;
        } else {
                cq->max_cql = min_t(u32, entries, MAX_CQL_PER_POLL);
                cq->cql = kcalloc(cq->max_cql, sizeof(struct bnxt_qplib_cqe),
                                  GFP_KERNEL);
                if (!cq->cql) {
                        rc = -ENOMEM;
                        goto fail;
                }

                cq->qplib_cq.dpi = &rdev->dpi_privileged;
        }
        /*
         * Allocating the NQ in a round robin fashion. nq_alloc_cnt is a
         * used for getting the NQ index.
         */
        nq_alloc_cnt = atomic_inc_return(&rdev->nq_alloc_cnt);
        nq = &rdev->nq[nq_alloc_cnt % (rdev->num_msix - 1)];
        cq->qplib_cq.max_wqe = entries;
        cq->qplib_cq.cnq_hw_ring_id = nq->ring_id;
        cq->qplib_cq.nq = nq;

        rc = bnxt_qplib_create_cq(&rdev->qplib_res, &cq->qplib_cq);
        if (rc) {
                ibdev_err(&rdev->ibdev, "Failed to create HW CQ");
                goto fail;
        }

        cq->ib_cq.cqe = entries;
        cq->cq_period = cq->qplib_cq.period;
        nq->budget++;

        atomic_inc(&rdev->cq_count);
        spin_lock_init(&cq->cq_lock);

        if (udata) {
                struct bnxt_re_cq_resp resp;

                resp.cqid = cq->qplib_cq.id;
                resp.tail = cq->qplib_cq.hwq.cons;
                resp.phase = cq->qplib_cq.period;
                resp.rsvd = 0;
                rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
                if (rc) {
                        ibdev_err(&rdev->ibdev, "Failed to copy CQ udata");
                        bnxt_qplib_destroy_cq(&rdev->qplib_res, &cq->qplib_cq);
                        goto c2fail;
                }
        }

        return 0;

c2fail:
        ib_umem_release(cq->umem);
fail:
        kfree(cq->cql);
        return rc;
}

static u8 __req_to_ib_wc_status(u8 qstatus)
{
        switch (qstatus) {
        case CQ_REQ_STATUS_OK:
                return IB_WC_SUCCESS;
        case CQ_REQ_STATUS_BAD_RESPONSE_ERR:
                return IB_WC_BAD_RESP_ERR;
        case CQ_REQ_STATUS_LOCAL_LENGTH_ERR:
                return IB_WC_LOC_LEN_ERR;
        case CQ_REQ_STATUS_LOCAL_QP_OPERATION_ERR:
                return IB_WC_LOC_QP_OP_ERR;
        case CQ_REQ_STATUS_LOCAL_PROTECTION_ERR:
                return IB_WC_LOC_PROT_ERR;
        case CQ_REQ_STATUS_MEMORY_MGT_OPERATION_ERR:
                return IB_WC_GENERAL_ERR;
        case CQ_REQ_STATUS_REMOTE_INVALID_REQUEST_ERR:
                return IB_WC_REM_INV_REQ_ERR;
        case CQ_REQ_STATUS_REMOTE_ACCESS_ERR:
                return IB_WC_REM_ACCESS_ERR;
        case CQ_REQ_STATUS_REMOTE_OPERATION_ERR:
                return IB_WC_REM_OP_ERR;
        case CQ_REQ_STATUS_RNR_NAK_RETRY_CNT_ERR:
                return IB_WC_RNR_RETRY_EXC_ERR;
        case CQ_REQ_STATUS_TRANSPORT_RETRY_CNT_ERR:
                return IB_WC_RETRY_EXC_ERR;
        case CQ_REQ_STATUS_WORK_REQUEST_FLUSHED_ERR:
                return IB_WC_WR_FLUSH_ERR;
        default:
                return IB_WC_GENERAL_ERR;
        }
        return 0;
}

static u8 __rawqp1_to_ib_wc_status(u8 qstatus)
{
        switch (qstatus) {
        case CQ_RES_RAWETH_QP1_STATUS_OK:
                return IB_WC_SUCCESS;
        case CQ_RES_RAWETH_QP1_STATUS_LOCAL_ACCESS_ERROR:
                return IB_WC_LOC_ACCESS_ERR;
        case CQ_RES_RAWETH_QP1_STATUS_HW_LOCAL_LENGTH_ERR:
                return IB_WC_LOC_LEN_ERR;
        case CQ_RES_RAWETH_QP1_STATUS_LOCAL_PROTECTION_ERR:
                return IB_WC_LOC_PROT_ERR;
        case CQ_RES_RAWETH_QP1_STATUS_LOCAL_QP_OPERATION_ERR:
                return IB_WC_LOC_QP_OP_ERR;
        case CQ_RES_RAWETH_QP1_STATUS_MEMORY_MGT_OPERATION_ERR:
                return IB_WC_GENERAL_ERR;
        case CQ_RES_RAWETH_QP1_STATUS_WORK_REQUEST_FLUSHED_ERR:
                return IB_WC_WR_FLUSH_ERR;
        case CQ_RES_RAWETH_QP1_STATUS_HW_FLUSH_ERR:
                return IB_WC_WR_FLUSH_ERR;
        default:
                return IB_WC_GENERAL_ERR;
        }
}

static u8 __rc_to_ib_wc_status(u8 qstatus)
{
        switch (qstatus) {
        case CQ_RES_RC_STATUS_OK:
                return IB_WC_SUCCESS;
        case CQ_RES_RC_STATUS_LOCAL_ACCESS_ERROR:
                return IB_WC_LOC_ACCESS_ERR;
        case CQ_RES_RC_STATUS_LOCAL_LENGTH_ERR:
                return IB_WC_LOC_LEN_ERR;
        case CQ_RES_RC_STATUS_LOCAL_PROTECTION_ERR:
                return IB_WC_LOC_PROT_ERR;
        case CQ_RES_RC_STATUS_LOCAL_QP_OPERATION_ERR:
                return IB_WC_LOC_QP_OP_ERR;
        case CQ_RES_RC_STATUS_MEMORY_MGT_OPERATION_ERR:
                return IB_WC_GENERAL_ERR;
        case CQ_RES_RC_STATUS_REMOTE_INVALID_REQUEST_ERR:
                return IB_WC_REM_INV_REQ_ERR;
        case CQ_RES_RC_STATUS_WORK_REQUEST_FLUSHED_ERR:
                return IB_WC_WR_FLUSH_ERR;
        case CQ_RES_RC_STATUS_HW_FLUSH_ERR:
                return IB_WC_WR_FLUSH_ERR;
        default:
                return IB_WC_GENERAL_ERR;
        }
}