/*******************************************************************************
*
* Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses.  You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenFabrics.org BSD license below:
*
*   Redistribution and use in source and binary forms, with or
*   without modification, are permitted provided that the following
*   conditions are met:
*
*    - Redistributions of source code must retain the above
*       copyright notice, this list of conditions and the following
*       disclaimer.
*
*    - Redistributions in binary form must reproduce the above
*       copyright notice, this list of conditions and the following
*       disclaimer in the documentation and/or other materials
*       provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*******************************************************************************/

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/random.h>
#include <linux/highmem.h>
#include <linux/time.h>
#include <linux/hugetlb.h>
#include <linux/irq.h>
#include <asm/byteorder.h>
#include <net/ip.h>
#include <rdma/ib_verbs.h>
#include <rdma/iw_cm.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_umem.h>
#include "i40iw.h"

/**
 * i40iw_query_device - get device attributes
 * @ibdev: device pointer from stack
 * @props: returning device attributes
 * @udata: user data
 */
static int i40iw_query_device(struct ib_device *ibdev,
                              struct ib_device_attr *props,
                              struct ib_udata *udata)
{
        struct i40iw_device *iwdev = to_iwdev(ibdev);

        if (udata->inlen || udata->outlen)
                return -EINVAL;
        memset(props, 0, sizeof(*props));
        ether_addr_copy((u8 *)&props->sys_image_guid, iwdev->netdev->dev_addr);
        props->fw_ver = I40IW_FW_VERSION;
        props->device_cap_flags = iwdev->device_cap_flags;
        props->vendor_id = iwdev->ldev->pcidev->vendor;
        props->vendor_part_id = iwdev->ldev->pcidev->device;
        props->hw_ver = (u32)iwdev->sc_dev.hw_rev;
        props->max_mr_size = I40IW_MAX_OUTBOUND_MESSAGE_SIZE;
        props->max_qp = iwdev->max_qp - iwdev->used_qps;
        props->max_qp_wr = I40IW_MAX_QP_WRS;
        props->max_sge = I40IW_MAX_WQ_FRAGMENT_COUNT;
        props->max_cq = iwdev->max_cq - iwdev->used_cqs;
        props->max_cqe = iwdev->max_cqe;
        props->max_mr = iwdev->max_mr - iwdev->used_mrs;
        props->max_pd = iwdev->max_pd - iwdev->used_pds;
        props->max_sge_rd = I40IW_MAX_SGE_RD;
        props->max_qp_rd_atom = I40IW_MAX_IRD_SIZE;
        props->max_qp_init_rd_atom = props->max_qp_rd_atom;
        props->atomic_cap = IB_ATOMIC_NONE;
        props->max_map_per_fmr = 1;
        props->max_fast_reg_page_list_len = I40IW_MAX_PAGES_PER_FMR;
        return 0;
}

/**
 * i40iw_query_port - get port attrubutes
 * @ibdev: device pointer from stack
 * @port: port number for query
 * @props: returning device attributes
 */
static int i40iw_query_port(struct ib_device *ibdev,
                            u8 port,
                            struct ib_port_attr *props)
{
        struct i40iw_device *iwdev = to_iwdev(ibdev);
        struct net_device *netdev = iwdev->netdev;

        /* props being zeroed by the caller, avoid zeroing it here */
        props->max_mtu = IB_MTU_4096;
        props->active_mtu = ib_mtu_int_to_enum(netdev->mtu);

        props->lid = 1;
        if (netif_carrier_ok(iwdev->netdev))
                props->state = IB_PORT_ACTIVE;
        else
                props->state = IB_PORT_DOWN;
        props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
                IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
        props->gid_tbl_len = 1;
        props->pkey_tbl_len = 1;
        props->active_width = IB_WIDTH_4X;
        props->active_speed = 1;
        props->max_msg_sz = I40IW_MAX_OUTBOUND_MESSAGE_SIZE;
        return 0;
}

/**
 * i40iw_alloc_ucontext - Allocate the user context data structure
 * @ibdev: device pointer from stack
 * @udata: user data
 *
 * This keeps track of all objects associated with a particular
 * user-mode client.
 */
static struct ib_ucontext *i40iw_alloc_ucontext(struct ib_device *ibdev,
                                                struct ib_udata *udata)
{
        struct i40iw_device *iwdev = to_iwdev(ibdev);
        struct i40iw_alloc_ucontext_req req;
        struct i40iw_alloc_ucontext_resp uresp;
        struct i40iw_ucontext *ucontext;

        if (ib_copy_from_udata(&req, udata, sizeof(req)))
                return ERR_PTR(-EINVAL);

        if (req.userspace_ver < 4 || req.userspace_ver > I40IW_ABI_VER) {
                i40iw_pr_err("Unsupported provider library version %u.\n", req.userspace_ver);
                return ERR_PTR(-EINVAL);
        }

        memset(&uresp, 0, sizeof(uresp));
        uresp.max_qps = iwdev->max_qp;
        uresp.max_pds = iwdev->max_pd;
        uresp.wq_size = iwdev->max_qp_wr * 2;
        uresp.kernel_ver = req.userspace_ver;

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

        ucontext->iwdev = iwdev;
        ucontext->abi_ver = req.userspace_ver;

        if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
                kfree(ucontext);
                return ERR_PTR(-EFAULT);
        }

        INIT_LIST_HEAD(&ucontext->cq_reg_mem_list);
        spin_lock_init(&ucontext->cq_reg_mem_list_lock);
        INIT_LIST_HEAD(&ucontext->qp_reg_mem_list);
        spin_lock_init(&ucontext->qp_reg_mem_list_lock);

        return &ucontext->ibucontext;
}

/**
 * i40iw_dealloc_ucontext - deallocate the user context data structure
 * @context: user context created during alloc
 */
static int i40iw_dealloc_ucontext(struct ib_ucontext *context)
{
        struct i40iw_ucontext *ucontext = to_ucontext(context);
        unsigned long flags;

        spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
        if (!list_empty(&ucontext->cq_reg_mem_list)) {
                spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
                return -EBUSY;
        }
        spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
        spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
        if (!list_empty(&ucontext->qp_reg_mem_list)) {
                spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
                return -EBUSY;
        }
        spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);

        kfree(ucontext);
        return 0;
}

/**
 * i40iw_mmap - user memory map
 * @context: context created during alloc
 * @vma: kernel info for user memory map
 */
static int i40iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
{
        struct i40iw_ucontext *ucontext;
        u64 db_addr_offset;
        u64 push_offset;

        ucontext = to_ucontext(context);
        if (ucontext->iwdev->sc_dev.is_pf) {
                db_addr_offset = I40IW_DB_ADDR_OFFSET;
                push_offset = I40IW_PUSH_OFFSET;
                if (vma->vm_pgoff)
                        vma->vm_pgoff += I40IW_PF_FIRST_PUSH_PAGE_INDEX - 1;
        } else {
                db_addr_offset = I40IW_VF_DB_ADDR_OFFSET;
                push_offset = I40IW_VF_PUSH_OFFSET;
                if (vma->vm_pgoff)
                        vma->vm_pgoff += I40IW_VF_FIRST_PUSH_PAGE_INDEX - 1;
        }

        vma->vm_pgoff += db_addr_offset >> PAGE_SHIFT;

        if (vma->vm_pgoff == (db_addr_offset >> PAGE_SHIFT)) {
                vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
                vma->vm_private_data = ucontext;
        } else {
                if ((vma->vm_pgoff - (push_offset >> PAGE_SHIFT)) % 2)
                        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
                else
                        vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
        }

        if (io_remap_pfn_range(vma, vma->vm_start,
                               vma->vm_pgoff + (pci_resource_start(ucontext->iwdev->ldev->pcidev, 0) >> PAGE_SHIFT),
                               PAGE_SIZE, vma->vm_page_prot))
                return -EAGAIN;

        return 0;
}

/**
 * i40iw_alloc_push_page - allocate a push page for qp
 * @iwdev: iwarp device
 * @qp: hardware control qp
 */
static void i40iw_alloc_push_page(struct i40iw_device *iwdev, struct i40iw_sc_qp *qp)
{
        struct i40iw_cqp_request *cqp_request;
        struct cqp_commands_info *cqp_info;
        enum i40iw_status_code status;

        if (qp->push_idx != I40IW_INVALID_PUSH_PAGE_INDEX)
                return;

        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
        if (!cqp_request)
                return;

        atomic_inc(&cqp_request->refcount);

        cqp_info = &cqp_request->info;
        cqp_info->cqp_cmd = OP_MANAGE_PUSH_PAGE;
        cqp_info->post_sq = 1;

        cqp_info->in.u.manage_push_page.info.qs_handle = qp->qs_handle;
        cqp_info->in.u.manage_push_page.info.free_page = 0;
        cqp_info->in.u.manage_push_page.cqp = &iwdev->cqp.sc_cqp;
        cqp_info->in.u.manage_push_page.scratch = (uintptr_t)cqp_request;

        status = i40iw_handle_cqp_op(iwdev, cqp_request);
        if (!status)
                qp->push_idx = cqp_request->compl_info.op_ret_val;
        else
                i40iw_pr_err("CQP-OP Push page fail");
        i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
}

/**
 * i40iw_dealloc_push_page - free a push page for qp
 * @iwdev: iwarp device
 * @qp: hardware control qp
 */
static void i40iw_dealloc_push_page(struct i40iw_device *iwdev, struct i40iw_sc_qp *qp)
{
        struct i40iw_cqp_request *cqp_request;
        struct cqp_commands_info *cqp_info;
        enum i40iw_status_code status;

        if (qp->push_idx == I40IW_INVALID_PUSH_PAGE_INDEX)
                return;

        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
        if (!cqp_request)
                return;

        cqp_info = &cqp_request->info;
        cqp_info->cqp_cmd = OP_MANAGE_PUSH_PAGE;
        cqp_info->post_sq = 1;

        cqp_info->in.u.manage_push_page.info.push_idx = qp->push_idx;
        cqp_info->in.u.manage_push_page.info.qs_handle = qp->qs_handle;
        cqp_info->in.u.manage_push_page.info.free_page = 1;
        cqp_info->in.u.manage_push_page.cqp = &iwdev->cqp.sc_cqp;
        cqp_info->in.u.manage_push_page.scratch = (uintptr_t)cqp_request;

        status = i40iw_handle_cqp_op(iwdev, cqp_request);
        if (!status)
                qp->push_idx = I40IW_INVALID_PUSH_PAGE_INDEX;
        else
                i40iw_pr_err("CQP-OP Push page fail");
}

/**
 * i40iw_alloc_pd - allocate protection domain
 * @ibdev: device pointer from stack
 * @context: user context created during alloc
 * @udata: user data
 */
static struct ib_pd *i40iw_alloc_pd(struct ib_device *ibdev,
                                    struct ib_ucontext *context,
                                    struct ib_udata *udata)
{
        struct i40iw_pd *iwpd;
        struct i40iw_device *iwdev = to_iwdev(ibdev);
        struct i40iw_sc_dev *dev = &iwdev->sc_dev;
        struct i40iw_alloc_pd_resp uresp;
        struct i40iw_sc_pd *sc_pd;
        struct i40iw_ucontext *ucontext;
        u32 pd_id = 0;
        int err;

        if (iwdev->closing)
                return ERR_PTR(-ENODEV);

        err = i40iw_alloc_resource(iwdev, iwdev->allocated_pds,
                                   iwdev->max_pd, &pd_id, &iwdev->next_pd);
        if (err) {
                i40iw_pr_err("alloc resource failed\n");
                return ERR_PTR(err);
        }

        iwpd = kzalloc(sizeof(*iwpd), GFP_KERNEL);
        if (!iwpd) {
                err = -ENOMEM;
                goto free_res;
        }

        sc_pd = &iwpd->sc_pd;

        if (context) {
                ucontext = to_ucontext(context);
                dev->iw_pd_ops->pd_init(dev, sc_pd, pd_id, ucontext->abi_ver);
                memset(&uresp, 0, sizeof(uresp));
                uresp.pd_id = pd_id;
                if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
                        err = -EFAULT;
                        goto error;
                }
        } else {
                dev->iw_pd_ops->pd_init(dev, sc_pd, pd_id, -1);
        }

        i40iw_add_pdusecount(iwpd);
        return &iwpd->ibpd;
error:
        kfree(iwpd);
free_res:
        i40iw_free_resource(iwdev, iwdev->allocated_pds, pd_id);
        return ERR_PTR(err);
}

/**
 * i40iw_dealloc_pd - deallocate pd
 * @ibpd: ptr of pd to be deallocated
 */
static int i40iw_dealloc_pd(struct ib_pd *ibpd)
{
        struct i40iw_pd *iwpd = to_iwpd(ibpd);
        struct i40iw_device *iwdev = to_iwdev(ibpd->device);

        i40iw_rem_pdusecount(iwpd, iwdev);
        return 0;
}

/**
 * i40iw_get_pbl - Retrieve pbl from a list given a virtual
 * address
 * @va: user virtual address
 * @pbl_list: pbl list to search in (QP's or CQ's)
 */
static struct i40iw_pbl *i40iw_get_pbl(unsigned long va,
                                       struct list_head *pbl_list)
{
        struct i40iw_pbl *iwpbl;

        list_for_each_entry(iwpbl, pbl_list, list) {
                if (iwpbl->user_base == va) {
                        iwpbl->on_list = false;
                        list_del(&iwpbl->list);
                        return iwpbl;
                }
        }
        return NULL;
}

/**
 * i40iw_free_qp_resources - free up memory resources for qp
 * @iwdev: iwarp device
 * @iwqp: qp ptr (user or kernel)
 * @qp_num: qp number assigned
 */
void i40iw_free_qp_resources(struct i40iw_device *iwdev,
                             struct i40iw_qp *iwqp,
                             u32 qp_num)
{
        struct i40iw_pbl *iwpbl = &iwqp->iwpbl;

        i40iw_ieq_cleanup_qp(iwdev->vsi.ieq, &iwqp->sc_qp);
        i40iw_dealloc_push_page(iwdev, &iwqp->sc_qp);
        if (qp_num)
                i40iw_free_resource(iwdev, iwdev->allocated_qps, qp_num);
        if (iwpbl->pbl_allocated)
                i40iw_free_pble(iwdev->pble_rsrc, &iwpbl->pble_alloc);
        i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->q2_ctx_mem);
        i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->kqp.dma_mem);
        kfree(iwqp->kqp.wrid_mem);
        iwqp->kqp.wrid_mem = NULL;
        kfree(iwqp->allocated_buffer);
}

/**
 * i40iw_clean_cqes - clean cq entries for qp
 * @iwqp: qp ptr (user or kernel)
 * @iwcq: cq ptr
 */
static void i40iw_clean_cqes(struct i40iw_qp *iwqp, struct i40iw_cq *iwcq)
{
        struct i40iw_cq_uk *ukcq = &iwcq->sc_cq.cq_uk;

        ukcq->ops.iw_cq_clean(&iwqp->sc_qp.qp_uk, ukcq);
}

/**
 * i40iw_destroy_qp - destroy qp
 * @ibqp: qp's ib pointer also to get to device's qp address
 */
static int i40iw_destroy_qp(struct ib_qp *ibqp)
{
        struct i40iw_qp *iwqp = to_iwqp(ibqp);

        iwqp->destroyed = 1;

        if (iwqp->ibqp_state >= IB_QPS_INIT && iwqp->ibqp_state < IB_QPS_RTS)
                i40iw_next_iw_state(iwqp, I40IW_QP_STATE_ERROR, 0, 0, 0);

        if (!iwqp->user_mode) {
                if (iwqp->iwscq) {
                        i40iw_clean_cqes(iwqp, iwqp->iwscq);
                        if (iwqp->iwrcq != iwqp->iwscq)
                                i40iw_clean_cqes(iwqp, iwqp->iwrcq);
                }
        }

        i40iw_rem_ref(&iwqp->ibqp);
        return 0;
}

/**
 * i40iw_setup_virt_qp - setup for allocation of virtual qp
 * @dev: iwarp device
 * @qp: qp ptr
 * @init_info: initialize info to return
 */
static int i40iw_setup_virt_qp(struct i40iw_device *iwdev,
                               struct i40iw_qp *iwqp,
                               struct i40iw_qp_init_info *init_info)
{
        struct i40iw_pbl *iwpbl = &iwqp->iwpbl;
        struct i40iw_qp_mr *qpmr = &iwpbl->qp_mr;

        iwqp->page = qpmr->sq_page;
        init_info->shadow_area_pa = cpu_to_le64(qpmr->shadow);
        if (iwpbl->pbl_allocated) {
                init_info->virtual_map = true;
                init_info->sq_pa = qpmr->sq_pbl.idx;
                init_info->rq_pa = qpmr->rq_pbl.idx;
        } else {
                init_info->sq_pa = qpmr->sq_pbl.addr;
                init_info->rq_pa = qpmr->rq_pbl.addr;
        }
        return 0;
}

/**
 * i40iw_setup_kmode_qp - setup initialization for kernel mode qp
 * @iwdev: iwarp device
 * @iwqp: qp ptr (user or kernel)
 * @info: initialize info to return
 */
static int i40iw_setup_kmode_qp(struct i40iw_device *iwdev,
                                struct i40iw_qp *iwqp,
                                struct i40iw_qp_init_info *info)
{
        struct i40iw_dma_mem *mem = &iwqp->kqp.dma_mem;
        u32 sqdepth, rqdepth;
        u8 sqshift;
        u32 size;
        enum i40iw_status_code status;
        struct i40iw_qp_uk_init_info *ukinfo = &info->qp_uk_init_info;

        i40iw_get_wqe_shift(ukinfo->max_sq_frag_cnt, ukinfo->max_inline_data, &sqshift);
        status = i40iw_get_sqdepth(ukinfo->sq_size, sqshift, &sqdepth);
        if (status)
                return -ENOMEM;

        status = i40iw_get_rqdepth(ukinfo->rq_size, I40IW_MAX_RQ_WQE_SHIFT, &rqdepth);
        if (status)
                return -ENOMEM;

        size = sqdepth * sizeof(struct i40iw_sq_uk_wr_trk_info) + (rqdepth << 3);
        iwqp->kqp.wrid_mem = kzalloc(size, GFP_KERNEL);

        ukinfo->sq_wrtrk_array = (struct i40iw_sq_uk_wr_trk_info *)iwqp->kqp.wrid_mem;
        if (!ukinfo->sq_wrtrk_array)
                return -ENOMEM;

        ukinfo->rq_wrid_array = (u64 *)&ukinfo->sq_wrtrk_array[sqdepth];

        size = (sqdepth + rqdepth) * I40IW_QP_WQE_MIN_SIZE;
        size += (I40IW_SHADOW_AREA_SIZE << 3);

        status = i40iw_allocate_dma_mem(iwdev->sc_dev.hw, mem, size, 256);
        if (status) {
                kfree(ukinfo->sq_wrtrk_array);
                ukinfo->sq_wrtrk_array = NULL;
                return -ENOMEM;
        }

        ukinfo->sq = mem->va;
        info->sq_pa = mem->pa;

        ukinfo->rq = &ukinfo->sq[sqdepth];
        info->rq_pa = info->sq_pa + (sqdepth * I40IW_QP_WQE_MIN_SIZE);

        ukinfo->shadow_area = ukinfo->rq[rqdepth].elem;
        info->shadow_area_pa = info->rq_pa + (rqdepth * I40IW_QP_WQE_MIN_SIZE);

        ukinfo->sq_size = sqdepth >> sqshift;
        ukinfo->rq_size = rqdepth >> I40IW_MAX_RQ_WQE_SHIFT;
        ukinfo->qp_id = iwqp->ibqp.qp_num;
        return 0;
}

/**
 * i40iw_create_qp - create qp
 * @ibpd: ptr of pd
 * @init_attr: attributes for qp
 * @udata: user data for create qp
 */
static struct ib_qp *i40iw_create_qp(struct ib_pd *ibpd,
                                     struct ib_qp_init_attr *init_attr,
                                     struct ib_udata *udata)
{
        struct i40iw_pd *iwpd = to_iwpd(ibpd);
        struct i40iw_device *iwdev = to_iwdev(ibpd->device);
        struct i40iw_cqp *iwcqp = &iwdev->cqp;
        struct i40iw_qp *iwqp;
        struct i40iw_ucontext *ucontext;
        struct i40iw_create_qp_req req;
        struct i40iw_create_qp_resp uresp;
        u32 qp_num = 0;
        void *mem;
        enum i40iw_status_code ret;
        int err_code;
        int sq_size;
        int rq_size;
        struct i40iw_sc_qp *qp;
        struct i40iw_sc_dev *dev = &iwdev->sc_dev;
        struct i40iw_qp_init_info init_info;
        struct i40iw_create_qp_info *qp_info;
        struct i40iw_cqp_request *cqp_request;
        struct cqp_commands_info *cqp_info;

        struct i40iw_qp_host_ctx_info *ctx_info;
        struct i40iwarp_offload_info *iwarp_info;
        unsigned long flags;

        if (iwdev->closing)
                return ERR_PTR(-ENODEV);

        if (init_attr->create_flags)
                return ERR_PTR(-EINVAL);
        if (init_attr->cap.max_inline_data > I40IW_MAX_INLINE_DATA_SIZE)
                init_attr->cap.max_inline_data = I40IW_MAX_INLINE_DATA_SIZE;

        if (init_attr->cap.max_send_sge > I40IW_MAX_WQ_FRAGMENT_COUNT)
                init_attr->cap.max_send_sge = I40IW_MAX_WQ_FRAGMENT_COUNT;

        if (init_attr->cap.max_recv_sge > I40IW_MAX_WQ_FRAGMENT_COUNT)
                init_attr->cap.max_recv_sge = I40IW_MAX_WQ_FRAGMENT_COUNT;

        memset(&init_info, 0, sizeof(init_info));

        sq_size = init_attr->cap.max_send_wr;
        rq_size = init_attr->cap.max_recv_wr;

        init_info.vsi = &iwdev->vsi;
        init_info.qp_uk_init_info.sq_size = sq_size;
        init_info.qp_uk_init_info.rq_size = rq_size;
        init_info.qp_uk_init_info.max_sq_frag_cnt = init_attr->cap.max_send_sge;
        init_info.qp_uk_init_info.max_rq_frag_cnt = init_attr->cap.max_recv_sge;
        init_info.qp_uk_init_info.max_inline_data = init_attr->cap.max_inline_data;

        mem = kzalloc(sizeof(*iwqp), GFP_KERNEL);
        if (!mem)
                return ERR_PTR(-ENOMEM);

        iwqp = (struct i40iw_qp *)mem;
        iwqp->allocated_buffer = mem;
        qp = &iwqp->sc_qp;
        qp->back_qp = (void *)iwqp;
        qp->push_idx = I40IW_INVALID_PUSH_PAGE_INDEX;

        iwqp->ctx_info.iwarp_info = &iwqp->iwarp_info;

        if (i40iw_allocate_dma_mem(dev->hw,
                                   &iwqp->q2_ctx_mem,
                                   I40IW_Q2_BUFFER_SIZE + I40IW_QP_CTX_SIZE,
                                   256)) {
                i40iw_pr_err("dma_mem failed\n");
                err_code = -ENOMEM;
                goto error;
        }

        init_info.q2 = iwqp->q2_ctx_mem.va;
        init_info.q2_pa = iwqp->q2_ctx_mem.pa;

        init_info.host_ctx = (void *)init_info.q2 + I40IW_Q2_BUFFER_SIZE;
        init_info.host_ctx_pa = init_info.q2_pa + I40IW_Q2_BUFFER_SIZE;

        err_code = i40iw_alloc_resource(iwdev, iwdev->allocated_qps, iwdev->max_qp,
                                        &qp_num, &iwdev->next_qp);
        if (err_code) {
                i40iw_pr_err("qp resource\n");
                goto error;
        }

        iwqp->iwdev = iwdev;
        iwqp->iwpd = iwpd;
        iwqp->ibqp.qp_num = qp_num;
        qp = &iwqp->sc_qp;
        iwqp->iwscq = to_iwcq(init_attr->send_cq);
        iwqp->iwrcq = to_iwcq(init_attr->recv_cq);

        iwqp->host_ctx.va = init_info.host_ctx;
        iwqp->host_ctx.pa = init_info.host_ctx_pa;
        iwqp->host_ctx.size = I40IW_QP_CTX_SIZE;

        init_info.pd = &iwpd->sc_pd;
        init_info.qp_uk_init_info.qp_id = iwqp->ibqp.qp_num;
        iwqp->ctx_info.qp_compl_ctx = (uintptr_t)qp;

        if (init_attr->qp_type != IB_QPT_RC) {
                err_code = -EINVAL;
                goto error;
        }
        if (iwdev->push_mode)
                i40iw_alloc_push_page(iwdev, qp);
        if (udata) {
                err_code = ib_copy_from_udata(&req, udata, sizeof(req));
                if (err_code) {
                        i40iw_pr_err("ib_copy_from_data\n");
                        goto error;
                }
                iwqp->ctx_info.qp_compl_ctx = req.user_compl_ctx;
                if (ibpd->uobject && ibpd->uobject->context) {
                        iwqp->user_mode = 1;
                        ucontext = to_ucontext(ibpd->uobject->context);

                        if (req.user_wqe_buffers) {
                                struct i40iw_pbl *iwpbl;

                                spin_lock_irqsave(
                                    &ucontext->qp_reg_mem_list_lock, flags);
                                iwpbl = i40iw_get_pbl(
                                    (unsigned long)req.user_wqe_buffers,
                                    &ucontext->qp_reg_mem_list);
                                spin_unlock_irqrestore(
                                    &ucontext->qp_reg_mem_list_lock, flags);

                                if (!iwpbl) {
                                        err_code = -ENODATA;
                                        i40iw_pr_err("no pbl info\n");
                                        goto error;
                                }
                                memcpy(&iwqp->iwpbl, iwpbl, sizeof(iwqp->iwpbl));
                        }
                }
                err_code = i40iw_setup_virt_qp(iwdev, iwqp, &init_info);
        } else {
                err_code = i40iw_setup_kmode_qp(iwdev, iwqp, &init_info);
        }

        if (err_code) {
                i40iw_pr_err("setup qp failed\n");
                goto error;
        }

        init_info.type = I40IW_QP_TYPE_IWARP;
        ret = dev->iw_priv_qp_ops->qp_init(qp, &init_info);
        if (ret) {
                err_code = -EPROTO;
                i40iw_pr_err("qp_init fail\n");
                goto error;
        }
        ctx_info = &iwqp->ctx_info;
        iwarp_info = &iwqp->iwarp_info;
        iwarp_info->rd_enable = true;
        iwarp_info->wr_rdresp_en = true;
        if (!iwqp->user_mode) {
                iwarp_info->fast_reg_en = true;
                iwarp_info->priv_mode_en = true;
        }
        iwarp_info->ddp_ver = 1;
        iwarp_info->rdmap_ver = 1;

        ctx_info->iwarp_info_valid = true;
        ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
        ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
        if (qp->push_idx == I40IW_INVALID_PUSH_PAGE_INDEX) {
                ctx_info->push_mode_en = false;
        } else {
                ctx_info->push_mode_en = true;
                ctx_info->push_idx = qp->push_idx;
        }

        ret = dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp,
                                             (u64 *)iwqp->host_ctx.va,
                                             ctx_info);
        ctx_info->iwarp_info_valid = false;
        cqp_request = i40iw_get_cqp_request(iwcqp, true);
        if (!cqp_request) {
                err_code = -ENOMEM;
                goto error;
        }
        cqp_info = &cqp_request->info;
        qp_info = &cqp_request->info.in.u.qp_create.info;

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

        qp_info->cq_num_valid = true;
        qp_info->next_iwarp_state = I40IW_QP_STATE_IDLE;

        cqp_info->cqp_cmd = OP_QP_CREATE;
        cqp_info->post_sq = 1;
        cqp_info->in.u.qp_create.qp = qp;
        cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
        ret = i40iw_handle_cqp_op(iwdev, cqp_request);
        if (ret) {
                i40iw_pr_err("CQP-OP QP create fail");
                err_code = -EACCES;
                goto error;
        }

        i40iw_add_ref(&iwqp->ibqp);
        spin_lock_init(&iwqp->lock);
        iwqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
        iwdev->qp_table[qp_num] = iwqp;
        i40iw_add_pdusecount(iwqp->iwpd);
        i40iw_add_devusecount(iwdev);
        if (ibpd->uobject && udata) {
                memset(&uresp, 0, sizeof(uresp));
                uresp.actual_sq_size = sq_size;
                uresp.actual_rq_size = rq_size;
                uresp.qp_id = qp_num;
                uresp.push_idx = qp->push_idx;
                err_code = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
                if (err_code) {
                        i40iw_pr_err("copy_to_udata failed\n");
                        i40iw_destroy_qp(&iwqp->ibqp);
                           /* let the completion of the qp destroy free the qp */
                        return ERR_PTR(err_code);
                }
        }
        init_completion(&iwqp->sq_drained);
        init_completion(&iwqp->rq_drained);

        return &iwqp->ibqp;
error:
        i40iw_free_qp_resources(iwdev, iwqp, qp_num);
        return ERR_PTR(err_code);
}

/**
 * i40iw_query - query qp attributes
 * @ibqp: qp pointer
 * @attr: attributes pointer
 * @attr_mask: Not used
 * @init_attr: qp attributes to return
 */
static int i40iw_query_qp(struct ib_qp *ibqp,
                          struct ib_qp_attr *attr,
                          int attr_mask,
                          struct ib_qp_init_attr *init_attr)
{
        struct i40iw_qp *iwqp = to_iwqp(ibqp);
        struct i40iw_sc_qp *qp = &iwqp->sc_qp;

        attr->qp_access_flags = 0;
        attr->cap.max_send_wr = qp->qp_uk.sq_size;
        attr->cap.max_recv_wr = qp->qp_uk.rq_size;
        attr->cap.max_inline_data = I40IW_MAX_INLINE_DATA_SIZE;
        attr->cap.max_send_sge = I40IW_MAX_WQ_FRAGMENT_COUNT;
        attr->cap.max_recv_sge = I40IW_MAX_WQ_FRAGMENT_COUNT;
        attr->port_num = 1;
        init_attr->event_handler = iwqp->ibqp.event_handler;
        init_attr->qp_context = iwqp->ibqp.qp_context;
        init_attr->send_cq = iwqp->ibqp.send_cq;
        init_attr->recv_cq = iwqp->ibqp.recv_cq;
        init_attr->srq = iwqp->ibqp.srq;
        init_attr->cap = attr->cap;
        init_attr->port_num = 1;
        return 0;
}

/**
 * i40iw_hw_modify_qp - setup cqp for modify qp
 * @iwdev: iwarp device
 * @iwqp: qp ptr (user or kernel)
 * @info: info for modify qp
 * @wait: flag to wait or not for modify qp completion
 */
void i40iw_hw_modify_qp(struct i40iw_device *iwdev, struct i40iw_qp *iwqp,
                        struct i40iw_modify_qp_info *info, bool wait)
{
        struct i40iw_cqp_request *cqp_request;
        struct cqp_commands_info *cqp_info;
        struct i40iw_modify_qp_info *m_info;
        struct i40iw_gen_ae_info ae_info;

        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, wait);
        if (!cqp_request)
                return;

        cqp_info = &cqp_request->info;
        m_info = &cqp_info->in.u.qp_modify.info;
        memcpy(m_info, info, sizeof(*m_info));
        cqp_info->cqp_cmd = OP_QP_MODIFY;
        cqp_info->post_sq = 1;
        cqp_info->in.u.qp_modify.qp = &iwqp->sc_qp;
        cqp_info->in.u.qp_modify.scratch = (uintptr_t)cqp_request;
        if (!i40iw_handle_cqp_op(iwdev, cqp_request))
                return;

        switch (m_info->next_iwarp_state) {
        case I40IW_QP_STATE_RTS:
                if (iwqp->iwarp_state == I40IW_QP_STATE_IDLE)
                        i40iw_send_reset(iwqp->cm_node);
                /* fall through */
        case I40IW_QP_STATE_IDLE:
        case I40IW_QP_STATE_TERMINATE:
        case I40IW_QP_STATE_CLOSING:
                ae_info.ae_code = I40IW_AE_BAD_CLOSE;
                ae_info.ae_source = 0;
                i40iw_gen_ae(iwdev, &iwqp->sc_qp, &ae_info, false);
                break;
        case I40IW_QP_STATE_ERROR:
        default:
                break;
        }
}

/**
 * i40iw_modify_qp - modify qp request
 * @ibqp: qp's pointer for modify
 * @attr: access attributes
 * @attr_mask: state mask
 * @udata: user data
 */
int i40iw_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
                    int attr_mask, struct ib_udata *udata)
{
        struct i40iw_qp *iwqp = to_iwqp(ibqp);
        struct i40iw_device *iwdev = iwqp->iwdev;
        struct i40iw_qp_host_ctx_info *ctx_info;
        struct i40iwarp_offload_info *iwarp_info;
        struct i40iw_modify_qp_info info;
        u8 issue_modify_qp = 0;
        u8 dont_wait = 0;
        u32 err;
        unsigned long flags;

        memset(&info, 0, sizeof(info));
        ctx_info = &iwqp->ctx_info;
        iwarp_info = &iwqp->iwarp_info;

        spin_lock_irqsave(&iwqp->lock, flags);

        if (attr_mask & IB_QP_STATE) {
                if (iwdev->closing && attr->qp_state != IB_QPS_ERR) {
                        err = -EINVAL;
                        goto exit;
                }

                switch (attr->qp_state) {
                case IB_QPS_INIT:
                case IB_QPS_RTR:
                        if (iwqp->iwarp_state > (u32)I40IW_QP_STATE_IDLE) {
                                err = -EINVAL;
                                goto exit;
                        }
                        if (iwqp->iwarp_state == I40IW_QP_STATE_INVALID) {
                                info.next_iwarp_state = I40IW_QP_STATE_IDLE;
                                issue_modify_qp = 1;
                        }
                        break;
                case IB_QPS_RTS:
                        if ((iwqp->iwarp_state > (u32)I40IW_QP_STATE_RTS) ||
                            (!iwqp->cm_id)) {
                                err = -EINVAL;
                                goto exit;
                        }

                        issue_modify_qp = 1;
                        iwqp->hw_tcp_state = I40IW_TCP_STATE_ESTABLISHED;
                        iwqp->hte_added = 1;
                        info.next_iwarp_state = I40IW_QP_STATE_RTS;
                        info.tcp_ctx_valid = true;
                        info.ord_valid = true;
                        info.arp_cache_idx_valid = true;
                        info.cq_num_valid = true;
                        break;
                case IB_QPS_SQD:
                        if (iwqp->hw_iwarp_state > (u32)I40IW_QP_STATE_RTS) {
                                err = 0;
                                goto exit;
                        }
                        if ((iwqp->iwarp_state == (u32)I40IW_QP_STATE_CLOSING) ||
                            (iwqp->iwarp_state < (u32)I40IW_QP_STATE_RTS)) {
                                err = 0;
                                goto exit;
                        }
                        if (iwqp->iwarp_state > (u32)I40IW_QP_STATE_CLOSING) {
                                err = -EINVAL;
                                goto exit;
                        }
                        info.next_iwarp_state = I40IW_QP_STATE_CLOSING;
                        issue_modify_qp = 1;
                        break;
                case IB_QPS_SQE:
                        if (iwqp->iwarp_state >= (u32)I40IW_QP_STATE_TERMINATE) {
                                err = -EINVAL;
                                goto exit;
                        }
                        info.next_iwarp_state = I40IW_QP_STATE_TERMINATE;
                        issue_modify_qp = 1;
                        break;
                case IB_QPS_ERR:
                case IB_QPS_RESET:
                        if (iwqp->iwarp_state == (u32)I40IW_QP_STATE_ERROR) {
                                err = -EINVAL;
                                goto exit;
                        }
                        if (iwqp->sc_qp.term_flags)
                                i40iw_terminate_del_timer(&iwqp->sc_qp);
                        info.next_iwarp_state = I40IW_QP_STATE_ERROR;
                        if ((iwqp->hw_tcp_state > I40IW_TCP_STATE_CLOSED) &&
                            iwdev->iw_status &&
                            (iwqp->hw_tcp_state != I40IW_TCP_STATE_TIME_WAIT))
                                info.reset_tcp_conn = true;
                        else
                                dont_wait = 1;
                        issue_modify_qp = 1;
                        info.next_iwarp_state = I40IW_QP_STATE_ERROR;
                        break;
                default:
                        err = -EINVAL;
                        goto exit;
                }

                iwqp->ibqp_state = attr->qp_state;

        }
        if (attr_mask & IB_QP_ACCESS_FLAGS) {
                ctx_info->iwarp_info_valid = true;
                if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE)
                        iwarp_info->wr_rdresp_en = true;
                if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE)
                        iwarp_info->wr_rdresp_en = true;
                if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ)
                        iwarp_info->rd_enable = true;
                if (attr->qp_access_flags & IB_ACCESS_MW_BIND)
                        iwarp_info->bind_en = true;

                if (iwqp->user_mode) {
                        iwarp_info->rd_enable = true;
                        iwarp_info->wr_rdresp_en = true;
                        iwarp_info->priv_mode_en = false;
                }
        }

        if (ctx_info->iwarp_info_valid) {
                struct i40iw_sc_dev *dev = &iwdev->sc_dev;
                int ret;

                ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
                ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
                ret = dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp,
                                                     (u64 *)iwqp->host_ctx.va,
                                                     ctx_info);
                if (ret) {
                        i40iw_pr_err("setting QP context\n");
                        err = -EINVAL;
                        goto exit;
                }
        }

        spin_unlock_irqrestore(&iwqp->lock, flags);

        if (issue_modify_qp) {
                i40iw_hw_modify_qp(iwdev, iwqp, &info, true);

                spin_lock_irqsave(&iwqp->lock, flags);
                iwqp->iwarp_state = info.next_iwarp_state;
                spin_unlock_irqrestore(&iwqp->lock, flags);
        }

        if (issue_modify_qp && (iwqp->ibqp_state > IB_QPS_RTS)) {
                if (dont_wait) {
                        if (iwqp->cm_id && iwqp->hw_tcp_state) {
                                spin_lock_irqsave(&iwqp->lock, flags);
                                iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
                                iwqp->last_aeq = I40IW_AE_RESET_SENT;
                                spin_unlock_irqrestore(&iwqp->lock, flags);
                                i40iw_cm_disconn(iwqp);
                        }
                } else {
                        spin_lock_irqsave(&iwqp->lock, flags);
                        if (iwqp->cm_id) {
                                if (atomic_inc_return(&iwqp->close_timer_started) == 1) {
                                        iwqp->cm_id->add_ref(iwqp->cm_id);
                                        i40iw_schedule_cm_timer(iwqp->cm_node,
                                                                (struct i40iw_puda_buf *)iwqp,
                                                                 I40IW_TIMER_TYPE_CLOSE, 1, 0);
                                }
                        }
                        spin_unlock_irqrestore(&iwqp->lock, flags);
                }
        }
        return 0;
exit:
        spin_unlock_irqrestore(&iwqp->lock, flags);
        return err;
}

/**
 * cq_free_resources - free up recources for cq
 * @iwdev: iwarp device
 * @iwcq: cq ptr
 */
static void cq_free_resources(struct i40iw_device *iwdev, struct i40iw_cq *iwcq)
{
        struct i40iw_sc_cq *cq = &iwcq->sc_cq;

        if (!iwcq->user_mode)
                i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwcq->kmem);
        i40iw_free_resource(iwdev, iwdev->allocated_cqs, cq->cq_uk.cq_id);
}

/**
 * i40iw_cq_wq_destroy - send cq destroy cqp
 * @iwdev: iwarp device
 * @cq: hardware control cq
 */
void i40iw_cq_wq_destroy(struct i40iw_device *iwdev, struct i40iw_sc_cq *cq)
{
        enum i40iw_status_code status;
        struct i40iw_cqp_request *cqp_request;
        struct cqp_commands_info *cqp_info;

        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
        if (!cqp_request)
                return;

        cqp_info = &cqp_request->info;

        cqp_info->cqp_cmd = OP_CQ_DESTROY;
        cqp_info->post_sq = 1;
        cqp_info->in.u.cq_destroy.cq = cq;
        cqp_info->in.u.cq_destroy.scratch = (uintptr_t)cqp_request;
        status = i40iw_handle_cqp_op(iwdev, cqp_request);
        if (status)
                i40iw_pr_err("CQP-OP Destroy QP fail");
}

/**
 * i40iw_destroy_cq - destroy cq
 * @ib_cq: cq pointer
 */
static int i40iw_destroy_cq(struct ib_cq *ib_cq)
{
        struct i40iw_cq *iwcq;
        struct i40iw_device *iwdev;
        struct i40iw_sc_cq *cq;

        if (!ib_cq) {
                i40iw_pr_err("ib_cq == NULL\n");
                return 0;
        }

        iwcq = to_iwcq(ib_cq);
        iwdev = to_iwdev(ib_cq->device);
        cq = &iwcq->sc_cq;
        i40iw_cq_wq_destroy(iwdev, cq);
        cq_free_resources(iwdev, iwcq);
        kfree(iwcq);
        i40iw_rem_devusecount(iwdev);
        return 0;
}

/**
 * i40iw_create_cq - create cq
 * @ibdev: device pointer from stack
 * @attr: attributes for cq
 * @context: user context created during alloc
 * @udata: user data
 */
static struct ib_cq *i40iw_create_cq(struct ib_device *ibdev,
                                     const struct ib_cq_init_attr *attr,
                                     struct ib_ucontext *context,
                                     struct ib_udata *udata)
{
        struct i40iw_device *iwdev = to_iwdev(ibdev);
        struct i40iw_cq *iwcq;
        struct i40iw_pbl *iwpbl;
        u32 cq_num = 0;
        struct i40iw_sc_cq *cq;
        struct i40iw_sc_dev *dev = &iwdev->sc_dev;
        struct i40iw_cq_init_info info;
        enum i40iw_status_code status;
        struct i40iw_cqp_request *cqp_request;
        struct cqp_commands_info *cqp_info;
        struct i40iw_cq_uk_init_info *ukinfo = &info.cq_uk_init_info;
        unsigned long flags;
        int err_code;
        int entries = attr->cqe;

        if (iwdev->closing)
                return ERR_PTR(-ENODEV);

        if (entries > iwdev->max_cqe)
                return ERR_PTR(-EINVAL);

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

        memset(&info, 0, sizeof(info));

        err_code = i40iw_alloc_resource(iwdev, iwdev->allocated_cqs,
                                        iwdev->max_cq, &cq_num,
                                        &iwdev->next_cq);
        if (err_code)
                goto error;

        cq = &iwcq->sc_cq;
        cq->back_cq = (void *)iwcq;
        spin_lock_init(&iwcq->lock);

        info.dev = dev;
        ukinfo->cq_size = max(entries, 4);
        ukinfo->cq_id = cq_num;
        iwcq->ibcq.cqe = info.cq_uk_init_info.cq_size;
        info.ceqe_mask = 0;
        if (attr->comp_vector < iwdev->ceqs_count)
                info.ceq_id = attr->comp_vector;
        info.ceq_id_valid = true;
        info.ceqe_mask = 1;
        info.type = I40IW_CQ_TYPE_IWARP;
        if (context) {
                struct i40iw_ucontext *ucontext;
                struct i40iw_create_cq_req req;
                struct i40iw_cq_mr *cqmr;

                memset(&req, 0, sizeof(req));
                iwcq->user_mode = true;
                ucontext = to_ucontext(context);
                if (ib_copy_from_udata(&req, udata, sizeof(struct i40iw_create_cq_req))) {
                        err_code = -EFAULT;
                        goto cq_free_resources;
                }

                spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
                iwpbl = i40iw_get_pbl((unsigned long)req.user_cq_buffer,
                                      &ucontext->cq_reg_mem_list);
                spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
                if (!iwpbl) {
                        err_code = -EPROTO;
                        goto cq_free_resources;
                }

                iwcq->iwpbl = iwpbl;
                iwcq->cq_mem_size = 0;
                cqmr = &iwpbl->cq_mr;
                info.shadow_area_pa = cpu_to_le64(cqmr->shadow);
                if (iwpbl->pbl_allocated) {
                        info.virtual_map = true;
                        info.pbl_chunk_size = 1;
                        info.first_pm_pbl_idx = cqmr->cq_pbl.idx;
                } else {
                        info.cq_base_pa = cqmr->cq_pbl.addr;
                }
        } else {
                /* Kmode allocations */
                int rsize;
                int shadow;

                rsize = info.cq_uk_init_info.cq_size * sizeof(struct i40iw_cqe);
                rsize = round_up(rsize, 256);
                shadow = I40IW_SHADOW_AREA_SIZE << 3;
                status = i40iw_allocate_dma_mem(dev->hw, &iwcq->kmem,
                                                rsize + shadow, 256);
                if (status) {
                        err_code = -ENOMEM;
                        goto cq_free_resources;
                }
                ukinfo->cq_base = iwcq->kmem.va;
                info.cq_base_pa = iwcq->kmem.pa;
                info.shadow_area_pa = info.cq_base_pa + rsize;
                ukinfo->shadow_area = iwcq->kmem.va + rsize;
        }

        if (dev->iw_priv_cq_ops->cq_init(cq, &info)) {
                i40iw_pr_err("init cq fail\n");
                err_code = -EPROTO;
                goto cq_free_resources;
        }

        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
        if (!cqp_request) {
                err_code = -ENOMEM;
                goto cq_free_resources;
        }

        cqp_info = &cqp_request->info;
        cqp_info->cqp_cmd = OP_CQ_CREATE;
        cqp_info->post_sq = 1;
        cqp_info->in.u.cq_create.cq = cq;
        cqp_info->in.u.cq_create.scratch = (uintptr_t)cqp_request;
        status = i40iw_handle_cqp_op(iwdev, cqp_request);
        if (status) {
                i40iw_pr_err("CQP-OP Create QP fail");
                err_code = -EPROTO;
                goto cq_free_resources;
        }

        if (context) {
                struct i40iw_create_cq_resp resp;

                memset(&resp, 0, sizeof(resp));
                resp.cq_id = info.cq_uk_init_info.cq_id;
                resp.cq_size = info.cq_uk_init_info.cq_size;
                if (ib_copy_to_udata(udata, &resp, sizeof(resp))) {
                        i40iw_pr_err("copy to user data\n");
                        err_code = -EPROTO;
                        goto cq_destroy;
                }
        }

        i40iw_add_devusecount(iwdev);
        return (struct ib_cq *)iwcq;

cq_destroy:
        i40iw_cq_wq_destroy(iwdev, cq);
cq_free_resources:
        cq_free_resources(iwdev, iwcq);
error:
        kfree(iwcq);
        return ERR_PTR(err_code);
}

/**
 * i40iw_get_user_access - get hw access from IB access
 * @acc: IB access to return hw access
 */
static inline u16 i40iw_get_user_access(int acc)
{
        u16 access = 0;

        access |= (acc & IB_ACCESS_LOCAL_WRITE) ? I40IW_ACCESS_FLAGS_LOCALWRITE : 0;
        access |= (acc & IB_ACCESS_REMOTE_WRITE) ? I40IW_ACCESS_FLAGS_REMOTEWRITE : 0;
        access |= (acc & IB_ACCESS_REMOTE_READ) ? I40IW_ACCESS_FLAGS_REMOTEREAD : 0;
        access |= (acc & IB_ACCESS_MW_BIND) ? I40IW_ACCESS_FLAGS_BIND_WINDOW : 0;
        return access;
}

/**
 * i40iw_free_stag - free stag resource
 * @iwdev: iwarp device
 * @stag: stag to free
 */
static void i40iw_free_stag(struct i40iw_device *iwdev, u32 stag)
{
        u32 stag_idx;

        stag_idx = (stag & iwdev->mr_stagmask) >> I40IW_CQPSQ_STAG_IDX_SHIFT;
        i40iw_free_resource(iwdev, iwdev->allocated_mrs, stag_idx);
        i40iw_rem_devusecount(iwdev);
}

/**
 * i40iw_create_stag - create random stag
 * @iwdev: iwarp device
 */
static u32 i40iw_create_stag(struct i40iw_device *iwdev)
{
        u32 stag = 0;
        u32 stag_index = 0;
        u32 next_stag_index;
        u32 driver_key;
        u32 random;
        u8 consumer_key;
        int ret;

        get_random_bytes(&random, sizeof(random));
        consumer_key = (u8)random;

        driver_key = random & ~iwdev->mr_stagmask;
        next_stag_index = (random & iwdev->mr_stagmask) >> 8;
        next_stag_index %= iwdev->max_mr;

        ret = i40iw_alloc_resource(iwdev,
                                   iwdev->allocated_mrs, iwdev->max_mr,
                                   &stag_index, &next_stag_index);
        if (!ret) {
                stag = stag_index << I40IW_CQPSQ_STAG_IDX_SHIFT;
                stag |= driver_key;
                stag += (u32)consumer_key;
                i40iw_add_devusecount(iwdev);
        }
        return stag;
}

/**
 * i40iw_next_pbl_addr - Get next pbl address
 * @pbl: pointer to a pble
 * @pinfo: info pointer
 * @idx: index
 */
static inline u64 *i40iw_next_pbl_addr(u64 *pbl,
                                       struct i40iw_pble_info **pinfo,
                                       u32 *idx)
{
        *idx += 1;
        if ((!(*pinfo)) || (*idx != (*pinfo)->cnt))
                return ++pbl;
        *idx = 0;
        (*pinfo)++;
        return (u64 *)(*pinfo)->addr;
}

/**
 * i40iw_copy_user_pgaddrs - copy user page address to pble's os locally
 * @iwmr: iwmr for IB's user page addresses
 * @pbl: ple pointer to save 1 level or 0 level pble
 * @level: indicated level 0, 1 or 2
 */
static void i40iw_copy_user_pgaddrs(struct i40iw_mr *iwmr,
                                    u64 *pbl,
                                    enum i40iw_pble_level level)
{
        struct ib_umem *region = iwmr->region;
        struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
        int chunk_pages, entry, i;
        struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
        struct i40iw_pble_info *pinfo;
        struct scatterlist *sg;
        u64 pg_addr = 0;
        u32 idx = 0;

        pinfo = (level == I40IW_LEVEL_1) ? NULL : palloc->level2.leaf;

        for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
                chunk_pages = sg_dma_len(sg) >> region->page_shift;
                if ((iwmr->type == IW_MEMREG_TYPE_QP) &&
                    !iwpbl->qp_mr.sq_page)
                        iwpbl->qp_mr.sq_page = sg_page(sg);
                for (i = 0; i < chunk_pages; i++) {
                        pg_addr = sg_dma_address(sg) +
                                (i << region->page_shift);

                        if ((entry + i) == 0)
                                *pbl = cpu_to_le64(pg_addr & iwmr->page_msk);
                        else if (!(pg_addr & ~iwmr->page_msk))
                                *pbl = cpu_to_le64(pg_addr);
                        else
                                continue;
                        pbl = i40iw_next_pbl_addr(pbl, &pinfo, &idx);
                }
        }
}

/**
 * i40iw_set_hugetlb_params - set MR pg size and mask to huge pg values.
 * @addr: virtual address
 * @iwmr: mr pointer for this memory registration
 */
static void i40iw_set_hugetlb_values(u64 addr, struct i40iw_mr *iwmr)
{
        struct vm_area_struct *vma;
        struct hstate *h;

        vma = find_vma(current->mm, addr);
        if (vma && is_vm_hugetlb_page(vma)) {
                h = hstate_vma(vma);
                if (huge_page_size(h) == 0x200000) {
                        iwmr->page_size = huge_page_size(h);
                        iwmr->page_msk = huge_page_mask(h);
                }
        }
}

/**
 * i40iw_check_mem_contiguous - check if pbls stored in arr are contiguous
 * @arr: lvl1 pbl array
 * @npages: page count
 * pg_size: page size
 *
 */
static bool i40iw_check_mem_contiguous(u64 *arr, u32 npages, u32 pg_size)
{
        u32 pg_idx;

        for (pg_idx = 0; pg_idx < npages; pg_idx++) {
                if ((*arr + (pg_size * pg_idx)) != arr[pg_idx])
                        return false;
        }
        return true;
}

/**
 * i40iw_check_mr_contiguous - check if MR is physically contiguous
 * @palloc: pbl allocation struct
 * pg_size: page size
 */
static bool i40iw_check_mr_contiguous(struct i40iw_pble_alloc *palloc, u32 pg_size)
{
        struct i40iw_pble_level2 *lvl2 = &palloc->level2;
        struct i40iw_pble_info *leaf = lvl2->leaf;
        u64 *arr = NULL;
        u64 *start_addr = NULL;
        int i;
        bool ret;

        if (palloc->level == I40IW_LEVEL_1) {
                arr = (u64 *)palloc->level1.addr;
                ret = i40iw_check_mem_contiguous(arr, palloc->total_cnt, pg_size);
                return ret;
        }

        start_addr = (u64 *)leaf->addr;

        for (i = 0; i < lvl2->leaf_cnt; i++, leaf++) {
                arr = (u64 *)leaf->addr;
                if ((*start_addr + (i * pg_size * PBLE_PER_PAGE)) != *arr)
                        return false;
                ret = i40iw_check_mem_contiguous(arr, leaf->cnt, pg_size);
                if (!ret)
                        return false;
        }

        return true;
}

/**
 * i40iw_setup_pbles - copy user pg address to pble's
 * @iwdev: iwarp device
 * @iwmr: mr pointer for this memory registration
 * @use_pbles: flag if to use pble's
 */
static int i40iw_setup_pbles(struct i40iw_device *iwdev,
                             struct i40iw_mr *iwmr,
                             bool use_pbles)
{
        struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
        struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
        struct i40iw_pble_info *pinfo;
        u64 *pbl;
        enum i40iw_status_code status;
        enum i40iw_pble_level level = I40IW_LEVEL_1;

        if (use_pbles) {
                mutex_lock(&iwdev->pbl_mutex);
                status = i40iw_get_pble(&iwdev->sc_dev, iwdev->pble_rsrc, palloc, iwmr->page_cnt);
                mutex_unlock(&iwdev->pbl_mutex);
                if (status)
                        return -ENOMEM;

                iwpbl->pbl_allocated = true;
                level = palloc->level;
                pinfo = (level == I40IW_LEVEL_1) ? &palloc->level1 : palloc->level2.leaf;
                pbl = (u64 *)pinfo->addr;
        } else {
                pbl = iwmr->pgaddrmem;
        }

        i40iw_copy_user_pgaddrs(iwmr, pbl, level);

        if (use_pbles)
                iwmr->pgaddrmem[0] = *pbl;

        return 0;
}

/**
 * i40iw_handle_q_mem - handle memory for qp and cq
 * @iwdev: iwarp device
 * @req: information for q memory management
 * @iwpbl: pble struct
 * @use_pbles: flag to use pble
 */
static int i40iw_handle_q_mem(struct i40iw_device *iwdev,
                              struct i40iw_mem_reg_req *req,
                              struct i40iw_pbl *iwpbl,
                              bool use_pbles)
{
        struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
        struct i40iw_mr *iwmr = iwpbl->iwmr;
        struct i40iw_qp_mr *qpmr = &iwpbl->qp_mr;
        struct i40iw_cq_mr *cqmr = &iwpbl->cq_mr;
        struct i40iw_hmc_pble *hmc_p;
        u64 *arr = iwmr->pgaddrmem;
        u32 pg_size;
        int err;
        int total;
        bool ret = true;

        total = req->sq_pages + req->rq_pages + req->cq_pages;
        pg_size = iwmr->page_size;

        err = i40iw_setup_pbles(iwdev, iwmr, use_pbles);
        if (err)
                return err;

        if (use_pbles && (palloc->level != I40IW_LEVEL_1)) {
                i40iw_free_pble(iwdev->pble_rsrc, palloc);
                iwpbl->pbl_allocated = false;
                return -ENOMEM;
        }

        if (use_pbles)
                arr = (u64 *)palloc->level1.addr;

        if (iwmr->type == IW_MEMREG_TYPE_QP) {
                hmc_p = &qpmr->sq_pbl;
                qpmr->shadow = (dma_addr_t)arr[total];

                if (use_pbles) {
                        ret = i40iw_check_mem_contiguous(arr, req->sq_pages, pg_size);
                        if (ret)
                                ret = i40iw_check_mem_contiguous(&arr[req->sq_pages], req->rq_pages, pg_size);
                }

                if (!ret) {
                        hmc_p->idx = palloc->level1.idx;
                        hmc_p = &qpmr->rq_pbl;
                        hmc_p->idx = palloc->level1.idx + req->sq_pages;
                } else {
                        hmc_p->addr = arr[0];
                        hmc_p = &qpmr->rq_pbl;
                        hmc_p->addr = arr[req->sq_pages];
                }
        } else {                /* CQ */
                hmc_p = &cqmr->cq_pbl;
                cqmr->shadow = (dma_addr_t)arr[total];

                if (use_pbles)
                        ret = i40iw_check_mem_contiguous(arr, req->cq_pages, pg_size);

                if (!ret)
                        hmc_p->idx = palloc->level1.idx;
                else
                        hmc_p->addr = arr[0];
        }

        if (use_pbles && ret) {
                i40iw_free_pble(iwdev->pble_rsrc, palloc);
                iwpbl->pbl_allocated = false;
        }

        return err;
}

/**
 * i40iw_hw_alloc_stag - cqp command to allocate stag
 * @iwdev: iwarp device
 * @iwmr: iwarp mr pointer
 */
static int i40iw_hw_alloc_stag(struct i40iw_device *iwdev, struct i40iw_mr *iwmr)
{
        struct i40iw_allocate_stag_info *info;
        struct i40iw_pd *iwpd = to_iwpd(iwmr->ibmr.pd);
        enum i40iw_status_code status;
        int err = 0;
        struct i40iw_cqp_request *cqp_request;
        struct cqp_commands_info *cqp_info;

        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
        if (!cqp_request)
                return -ENOMEM;

        cqp_info = &cqp_request->info;
        info = &cqp_info->in.u.alloc_stag.info;
        memset(info, 0, sizeof(*info));
        info->page_size = PAGE_SIZE;
        info->stag_idx = iwmr->stag >> I40IW_CQPSQ_STAG_IDX_SHIFT;
        info->pd_id = iwpd->sc_pd.pd_id;
        info->total_len = iwmr->length;
        info->remote_access = true;
        cqp_info->cqp_cmd = OP_ALLOC_STAG;
        cqp_info->post_sq = 1;
        cqp_info->in.u.alloc_stag.dev = &iwdev->sc_dev;
        cqp_info->in.u.alloc_stag.scratch = (uintptr_t)cqp_request;

        status = i40iw_handle_cqp_op(iwdev, cqp_request);
        if (status) {
                err = -ENOMEM;
                i40iw_pr_err("CQP-OP MR Reg fail");
        }
        return err;
}

/**
 * i40iw_alloc_mr - register stag for fast memory registration
 * @pd: ibpd pointer
 * @mr_type: memory for stag registrion
 * @max_num_sg: man number of pages
 */
static struct ib_mr *i40iw_alloc_mr(struct ib_pd *pd,
                                    enum ib_mr_type mr_type,
                                    u32 max_num_sg)
{
        struct i40iw_pd *iwpd = to_iwpd(pd);
        struct i40iw_device *iwdev = to_iwdev(pd->device);
        struct i40iw_pble_alloc *palloc;
        struct i40iw_pbl *iwpbl;
        struct i40iw_mr *iwmr;
        enum i40iw_status_code status;
        u32 stag;
        int err_code = -ENOMEM;

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

        stag = i40iw_create_stag(iwdev);
        if (!stag) {
                err_code = -EOVERFLOW;
                goto err;
        }
        stag &= ~I40IW_CQPSQ_STAG_KEY_MASK;
        iwmr->stag = stag;
        iwmr->ibmr.rkey = stag;
        iwmr->ibmr.lkey = stag;
        iwmr->ibmr.pd = pd;
        iwmr->ibmr.device = pd->device;
        iwpbl = &iwmr->iwpbl;
        iwpbl->iwmr = iwmr;
        iwmr->type = IW_MEMREG_TYPE_MEM;
        palloc = &iwpbl->pble_alloc;
        iwmr->page_cnt = max_num_sg;
        mutex_lock(&iwdev->pbl_mutex);
        status = i40iw_get_pble(&iwdev->sc_dev, iwdev->pble_rsrc, palloc, iwmr->page_cnt);
        mutex_unlock(&iwdev->pbl_mutex);
        if (status)
                goto err1;

        if (palloc->level != I40IW_LEVEL_1)
                goto err2;
        err_code = i40iw_hw_alloc_stag(iwdev, iwmr);
        if (err_code)
                goto err2;
        iwpbl->pbl_allocated = true;
        i40iw_add_pdusecount(iwpd);
        return &iwmr->ibmr;
err2:
        i40iw_free_pble(iwdev->pble_rsrc, palloc);
err1:
        i40iw_free_stag(iwdev, stag);
err:
        kfree(iwmr);
        return ERR_PTR(err_code);
}

/**
 * i40iw_set_page - populate pbl list for fmr
 * @ibmr: ib mem to access iwarp mr pointer
 * @addr: page dma address fro pbl list
 */
static int i40iw_set_page(struct ib_mr *ibmr, u64 addr)
{
        struct i40iw_mr *iwmr = to_iwmr(ibmr);
        struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
        struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
        u64 *pbl;

        if (unlikely(iwmr->npages == iwmr->page_cnt))
                return -ENOMEM;

        pbl = (u64 *)palloc->level1.addr;
        pbl[iwmr->npages++] = cpu_to_le64(addr);
        return 0;
}

/**
 * i40iw_map_mr_sg - map of sg list for fmr
 * @ibmr: ib mem to access iwarp mr pointer
 * @sg: scatter gather list for fmr
 * @sg_nents: number of sg pages
 */
static int i40iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
                           int sg_nents, unsigned int *sg_offset)
{
        struct i40iw_mr *iwmr = to_iwmr(ibmr);

        iwmr->npages = 0;
        return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, i40iw_set_page);
}

/**
 * i40iw_drain_sq - drain the send queue
 * @ibqp: ib qp pointer
 */
static void i40iw_drain_sq(struct ib_qp *ibqp)
{
        struct i40iw_qp *iwqp = to_iwqp(ibqp);
        struct i40iw_sc_qp *qp = &iwqp->sc_qp;

        if (I40IW_RING_MORE_WORK(qp->qp_uk.sq_ring))
                wait_for_completion(&iwqp->sq_drained);
}

/**
 * i40iw_drain_rq - drain the receive queue
 * @ibqp: ib qp pointer
 */
static void i40iw_drain_rq(struct ib_qp *ibqp)
{
        struct i40iw_qp *iwqp = to_iwqp(ibqp);
        struct i40iw_sc_qp *qp = &iwqp->sc_qp;

        if (I40IW_RING_MORE_WORK(qp->qp_uk.rq_ring))
                wait_for_completion(&iwqp->rq_drained);
}

/**
 * i40iw_hwreg_mr - send cqp command for memory registration
 * @iwdev: iwarp device
 * @iwmr: iwarp mr pointer
 * @access: access for MR
 */
static int i40iw_hwreg_mr(struct i40iw_device *iwdev,
                          struct i40iw_mr *iwmr,
                          u16 access)
{
        struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
        struct i40iw_reg_ns_stag_info *stag_info;
        struct i40iw_pd *iwpd = to_iwpd(iwmr->ibmr.pd);
        struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
        enum i40iw_status_code status;
        int err = 0;
        struct i40iw_cqp_request *cqp_request;
        struct cqp_commands_info *cqp_info;

        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
        if (!cqp_request)
                return -ENOMEM;

        cqp_info = &cqp_request->info;
        stag_info = &cqp_info->in.u.mr_reg_non_shared.info;
        memset(stag_info, 0, sizeof(*stag_info));
        stag_info->va = (void *)(unsigned long)iwpbl->user_base;
        stag_info->stag_idx = iwmr->stag >> I40IW_CQPSQ_STAG_IDX_SHIFT;
        stag_info->stag_key = (u8)iwmr->stag;
        stag_info->total_len = iwmr->length;
        stag_info->access_rights = access;
        stag_info->pd_id = iwpd->sc_pd.pd_id;
        stag_info->addr_type = I40IW_ADDR_TYPE_VA_BASED;
        stag_info->page_size = iwmr->page_size;

        if (iwpbl->pbl_allocated) {
                if (palloc->level == I40IW_LEVEL_1) {
                        stag_info->first_pm_pbl_index = palloc->level1.idx;
                        stag_info->chunk_size = 1;
                } else {
                        stag_info->first_pm_pbl_index = palloc->level2.root.idx;
                        stag_info->chunk_size = 3;
                }
        } else {
                stag_info->reg_addr_pa = iwmr->pgaddrmem[0];
        }

        cqp_info->cqp_cmd = OP_MR_REG_NON_SHARED;
        cqp_info->post_sq = 1;
        cqp_info->in.u.mr_reg_non_shared.dev = &iwdev->sc_dev;
        cqp_info->in.u.mr_reg_non_shared.scratch = (uintptr_t)cqp_request;

        status = i40iw_handle_cqp_op(iwdev, cqp_request);
        if (status) {
                err = -ENOMEM;
                i40iw_pr_err("CQP-OP MR Reg fail");
        }
        return err;
}

/**
 * i40iw_reg_user_mr - Register a user memory region
 * @pd: ptr of pd
 * @start: virtual start address
 * @length: length of mr
 * @virt: virtual address
 * @acc: access of mr
 * @udata: user data
 */
static struct ib_mr *i40iw_reg_user_mr(struct ib_pd *pd,
                                       u64 start,
                                       u64 length,
                                       u64 virt,
                                       int acc,
                                       struct ib_udata *udata)
{
        struct i40iw_pd *iwpd = to_iwpd(pd);
        struct i40iw_device *iwdev = to_iwdev(pd->device);
        struct i40iw_ucontext *ucontext;
        struct i40iw_pble_alloc *palloc;
        struct i40iw_pbl *iwpbl;
        struct i40iw_mr *iwmr;
        struct ib_umem *region;
        struct i40iw_mem_reg_req req;
        u64 pbl_depth = 0;
        u32 stag = 0;
        u16 access;
        u64 region_length;
        bool use_pbles = false;
        unsigned long flags;
        int err = -ENOSYS;
        int ret;
        int pg_shift;

        if (iwdev->closing)
                return ERR_PTR(-ENODEV);

        if (length > I40IW_MAX_MR_SIZE)
                return ERR_PTR(-EINVAL);
        region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
        if (IS_ERR(region))
                return (struct ib_mr *)region;

        if (ib_copy_from_udata(&req, udata, sizeof(req))) {
                ib_umem_release(region);
                return ERR_PTR(-EFAULT);
        }

        iwmr = kzalloc(sizeof(*iwmr), GFP_KERNEL);
        if (!iwmr) {
                ib_umem_release(region);
                return ERR_PTR(-ENOMEM);
        }

        iwpbl = &iwmr->iwpbl;
        iwpbl->iwmr = iwmr;
        iwmr->region = region;
        iwmr->ibmr.pd = pd;
        iwmr->ibmr.device = pd->device;
        ucontext = to_ucontext(pd->uobject->context);

        iwmr->page_size = PAGE_SIZE;
        iwmr->page_msk = PAGE_MASK;

        if (region->hugetlb && (req.reg_type == IW_MEMREG_TYPE_MEM))
                i40iw_set_hugetlb_values(start, iwmr);

        region_length = region->length + (start & (iwmr->page_size - 1));
        pg_shift = ffs(iwmr->page_size) - 1;
        pbl_depth = region_length >> pg_shift;
        pbl_depth += (region_length & (iwmr->page_size - 1)) ? 1 : 0;
        iwmr->length = region->length;

        iwpbl->user_base = virt;
        palloc = &iwpbl->pble_alloc;

        iwmr->type = req.reg_type;
        iwmr->page_cnt = (u32)pbl_depth;

        switch (req.reg_type) {
        case IW_MEMREG_TYPE_QP:
                use_pbles = ((req.sq_pages + req.rq_pages) > 2);
                err = i40iw_handle_q_mem(iwdev, &req, iwpbl, use_pbles);
                if (err)
                        goto error;
                spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
                list_add_tail(&iwpbl->list, &ucontext->qp_reg_mem_list);
                iwpbl->on_list = true;
                spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
                break;
        case IW_MEMREG_TYPE_CQ:
                use_pbles = (req.cq_pages > 1);
                err = i40iw_handle_q_mem(iwdev, &req, iwpbl, use_pbles);
                if (err)
                        goto error;

                spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
                list_add_tail(&iwpbl->list, &ucontext->cq_reg_mem_list);
                iwpbl->on_list = true;
                spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
                break;
        case IW_MEMREG_TYPE_MEM:
                use_pbles = (iwmr->page_cnt != 1);
                access = I40IW_ACCESS_FLAGS_LOCALREAD;

                err = i40iw_setup_pbles(iwdev, iwmr, use_pbles);
                if (err)
                        goto error;

                if (use_pbles) {
                        ret = i40iw_check_mr_contiguous(palloc, iwmr->page_size);
                        if (ret) {
                                i40iw_free_pble(iwdev->pble_rsrc, palloc);
                                iwpbl->pbl_allocated = false;
                        }
                }

                access |= i40iw_get_user_access(acc);
                stag = i40iw_create_stag(iwdev);
                if (!stag) {
                        err = -ENOMEM;
                        goto error;
                }

                iwmr->stag = stag;
                iwmr->ibmr.rkey = stag;
                iwmr->ibmr.lkey = stag;

                err = i40iw_hwreg_mr(iwdev, iwmr, access);
                if (err) {
                        i40iw_free_stag(iwdev, stag);
                        goto error;
                }

                break;
        default:
                goto error;
        }

        iwmr->type = req.reg_type;
        if (req.reg_type == IW_MEMREG_TYPE_MEM)
                i40iw_add_pdusecount(iwpd);
        return &iwmr->ibmr;

error:
        if (palloc->level != I40IW_LEVEL_0 && iwpbl->pbl_allocated)
                i40iw_free_pble(iwdev->pble_rsrc, palloc);
        ib_umem_release(region);
        kfree(iwmr);
        return ERR_PTR(err);
}

/**
 * i40iw_reg_phys_mr - register kernel physical memory
 * @pd: ibpd pointer
 * @addr: physical address of memory to register
 * @size: size of memory to register
 * @acc: Access rights
 * @iova_start: start of virtual address for physical buffers
 */
struct ib_mr *i40iw_reg_phys_mr(struct ib_pd *pd,
                                u64 addr,
                                u64 size,
                                int acc,
                                u64 *iova_start)
{
        struct i40iw_pd *iwpd = to_iwpd(pd);
        struct i40iw_device *iwdev = to_iwdev(pd->device);
        struct i40iw_pbl *iwpbl;
        struct i40iw_mr *iwmr;
        enum i40iw_status_code status;
        u32 stag;
        u16 access = I40IW_ACCESS_FLAGS_LOCALREAD;
        int ret;

        iwmr = kzalloc(sizeof(*iwmr), GFP_KERNEL);
        if (!iwmr)
                return ERR_PTR(-ENOMEM);
        iwmr->ibmr.pd = pd;
        iwmr->ibmr.device = pd->device;
        iwpbl = &iwmr->iwpbl;
        iwpbl->iwmr = iwmr;
        iwmr->type = IW_MEMREG_TYPE_MEM;
        iwpbl->user_base = *iova_start;
        stag = i40iw_create_stag(iwdev);
        if (!stag) {

                ret = -EOVERFLOW;
                goto err;
        }
        access |= i40iw_get_user_access(acc);
        iwmr->stag = stag;
        iwmr->ibmr.rkey = stag;
        iwmr->ibmr.lkey = stag;
        iwmr->page_cnt = 1;
        iwmr->pgaddrmem[0]  = addr;
        iwmr->length = size;
        status = i40iw_hwreg_mr(iwdev, iwmr, access);
        if (status) {
                i40iw_free_stag(iwdev, stag);
                ret = -ENOMEM;
                goto err;
        }

        i40iw_add_pdusecount(iwpd);
        return &iwmr->ibmr;
 err:
        kfree(iwmr);
        return ERR_PTR(ret);
}

/**
 * i40iw_get_dma_mr - register physical mem
 * @pd: ptr of pd
 * @acc: access for memory
 */
static struct ib_mr *i40iw_get_dma_mr(struct ib_pd *pd, int acc)
{
        u64 kva = 0;

        return i40iw_reg_phys_mr(pd, 0, 0, acc, &kva);
}

/**
 * i40iw_del_mem_list - Deleting pbl list entries for CQ/QP
 * @iwmr: iwmr for IB's user page addresses
 * @ucontext: ptr to user context
 */
static void i40iw_del_memlist(struct i40iw_mr *iwmr,
                              struct i40iw_ucontext *ucontext)
{
        struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
        unsigned long flags;

        switch (iwmr->type) {
        case IW_MEMREG_TYPE_CQ:
                spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
                if (iwpbl->on_list) {
                        iwpbl->on_list = false;
                        list_del(&iwpbl->list);
                }
                spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
                break;
        case IW_MEMREG_TYPE_QP:
                spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
                if (iwpbl->on_list) {
                        iwpbl->on_list = false;
                        list_del(&iwpbl->list);
                }
                spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
                break;
        default:
                break;
        }
}

/**
 * i40iw_dereg_mr - deregister mr
 * @ib_mr: mr ptr for dereg
 */
static int i40iw_dereg_mr(struct ib_mr *ib_mr)
{
        struct ib_pd *ibpd = ib_mr->pd;
        struct i40iw_pd *iwpd = to_iwpd(ibpd);
        struct i40iw_mr *iwmr = to_iwmr(ib_mr);
        struct i40iw_device *iwdev = to_iwdev(ib_mr->device);
        enum i40iw_status_code status;
        struct i40iw_dealloc_stag_info *info;
        struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
        struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
        struct i40iw_cqp_request *cqp_request;
        struct cqp_commands_info *cqp_info;
        u32 stag_idx;

        if (iwmr->region)
                ib_umem_release(iwmr->region);

        if (iwmr->type != IW_MEMREG_TYPE_MEM) {
                if (ibpd->uobject) {
                        struct i40iw_ucontext *ucontext;

                        ucontext = to_ucontext(ibpd->uobject->context);
                        i40iw_del_memlist(iwmr, ucontext);
                }
                if (iwpbl->pbl_allocated && iwmr->type != IW_MEMREG_TYPE_QP)
                        i40iw_free_pble(iwdev->pble_rsrc, palloc);
                kfree(iwmr);
                return 0;
        }

        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
        if (!cqp_request)
                return -ENOMEM;

        cqp_info = &cqp_request->info;
        info = &cqp_info->in.u.dealloc_stag.info;
        memset(info, 0, sizeof(*info));

        info->pd_id = cpu_to_le32(iwpd->sc_pd.pd_id & 0x00007fff);
        info->stag_idx = RS_64_1(ib_mr->rkey, I40IW_CQPSQ_STAG_IDX_SHIFT);
        stag_idx = info->stag_idx;
        info->mr = true;
        if (iwpbl->pbl_allocated)
                info->dealloc_pbl = true;

        cqp_info->cqp_cmd = OP_DEALLOC_STAG;
        cqp_info->post_sq = 1;
        cqp_info->in.u.dealloc_stag.dev = &iwdev->sc_dev;
        cqp_info->in.u.dealloc_stag.scratch = (uintptr_t)cqp_request;
        status = i40iw_handle_cqp_op(iwdev, cqp_request);
        if (status)
                i40iw_pr_err("CQP-OP dealloc failed for stag_idx = 0x%x\n", stag_idx);
        i40iw_rem_pdusecount(iwpd, iwdev);
        i40iw_free_stag(iwdev, iwmr->stag);
        if (iwpbl->pbl_allocated)
                i40iw_free_pble(iwdev->pble_rsrc, palloc);
        kfree(iwmr);
        return 0;
}

/**
 * i40iw_show_rev
 */
static ssize_t i40iw_show_rev(struct device *dev,
                              struct device_attribute *attr, char *buf)
{
        struct i40iw_ib_device *iwibdev = container_of(dev,
                                                       struct i40iw_ib_device,
                                                       ibdev.dev);
        u32 hw_rev = iwibdev->iwdev->sc_dev.hw_rev;

        return sprintf(buf, "%x\n", hw_rev);
}

/**
 * i40iw_show_hca
 */
static ssize_t i40iw_show_hca(struct device *dev,
                              struct device_attribute *attr, char *buf)
{
        return sprintf(buf, "I40IW\n");
}

/**
 * i40iw_show_board
 */
static ssize_t i40iw_show_board(struct device *dev,
                                struct device_attribute *attr,
                                char *buf)
{
        return sprintf(buf, "%.*s\n", 32, "I40IW Board ID");
}

static DEVICE_ATTR(hw_rev, S_IRUGO, i40iw_show_rev, NULL);
static DEVICE_ATTR(hca_type, S_IRUGO, i40iw_show_hca, NULL);
static DEVICE_ATTR(board_id, S_IRUGO, i40iw_show_board, NULL);

static struct device_attribute *i40iw_dev_attributes[] = {
        &dev_attr_hw_rev,
        &dev_attr_hca_type,
        &dev_attr_board_id
};

/**
 * i40iw_copy_sg_list - copy sg list for qp
 * @sg_list: copied into sg_list
 * @sgl: copy from sgl
 * @num_sges: count of sg entries
 */
static void i40iw_copy_sg_list(struct i40iw_sge *sg_list, struct ib_sge *sgl, int num_sges)
{
        unsigned int i;

        for (i = 0; (i < num_sges) && (i < I40IW_MAX_WQ_FRAGMENT_COUNT); i++) {
                sg_list[i].tag_off = sgl[i].addr;
                sg_list[i].len = sgl[i].length;
                sg_list[i].stag = sgl[i].lkey;
        }
}

/**
 * i40iw_post_send -  kernel application wr
 * @ibqp: qp ptr for wr
 * @ib_wr: work request ptr
 * @bad_wr: return of bad wr if err
 */
static int i40iw_post_send(struct ib_qp *ibqp,
                           struct ib_send_wr *ib_wr,
                           struct ib_send_wr **bad_wr)
{
        struct i40iw_qp *iwqp;
        struct i40iw_qp_uk *ukqp;
        struct i40iw_post_sq_info info;
        enum i40iw_status_code ret;
        int err = 0;
        unsigned long flags;
        bool inv_stag;

        iwqp = (struct i40iw_qp *)ibqp;
        ukqp = &iwqp->sc_qp.qp_uk;

        spin_lock_irqsave(&iwqp->lock, flags);

        if (iwqp->flush_issued) {
                err = -EINVAL;
                goto out;
        }

        while (ib_wr) {
                inv_stag = false;
                memset(&info, 0, sizeof(info));
                info.wr_id = (u64)(ib_wr->wr_id);
                if ((ib_wr->send_flags & IB_SEND_SIGNALED) || iwqp->sig_all)
                        info.signaled = true;
                if (ib_wr->send_flags & IB_SEND_FENCE)
                        info.read_fence = true;

                switch (ib_wr->opcode) {
                case IB_WR_SEND:
                        /* fall-through */
                case IB_WR_SEND_WITH_INV:
                        if (ib_wr->opcode == IB_WR_SEND) {
                                if (ib_wr->send_flags & IB_SEND_SOLICITED)
                                        info.op_type = I40IW_OP_TYPE_SEND_SOL;
                                else
                                        info.op_type = I40IW_OP_TYPE_SEND;
                        } else {
                                if (ib_wr->send_flags & IB_SEND_SOLICITED)
                                        info.op_type = I40IW_OP_TYPE_SEND_SOL_INV;
                                else
                                        info.op_type = I40IW_OP_TYPE_SEND_INV;
                        }

                        if (ib_wr->send_flags & IB_SEND_INLINE) {
                                info.op.inline_send.data = (void *)(unsigned long)ib_wr->sg_list[0].addr;
                                info.op.inline_send.len = ib_wr->sg_list[0].length;
                                ret = ukqp->ops.iw_inline_send(ukqp, &info, ib_wr->ex.invalidate_rkey, false);
                        } else {
                                info.op.send.num_sges = ib_wr->num_sge;
                                info.op.send.sg_list = (struct i40iw_sge *)ib_wr->sg_list;
                                ret = ukqp->ops.iw_send(ukqp, &info, ib_wr->ex.invalidate_rkey, false);
                        }

                        if (ret) {
                                if (ret == I40IW_ERR_QP_TOOMANY_WRS_POSTED)
                                        err = -ENOMEM;
                                else
                                        err = -EINVAL;
                        }
                        break;
                case IB_WR_RDMA_WRITE:
                        info.op_type = I40IW_OP_TYPE_RDMA_WRITE;

                        if (ib_wr->send_flags & IB_SEND_INLINE) {
                                info.op.inline_rdma_write.data = (void *)(unsigned long)ib_wr->sg_list[0].addr;
                                info.op.inline_rdma_write.len = ib_wr->sg_list[0].length;
                                info.op.inline_rdma_write.rem_addr.tag_off = rdma_wr(ib_wr)->remote_addr;
                                info.op.inline_rdma_write.rem_addr.stag = rdma_wr(ib_wr)->rkey;
                                ret = ukqp->ops.iw_inline_rdma_write(ukqp, &info, false);
                        } else {
                                info.op.rdma_write.lo_sg_list = (void *)ib_wr->sg_list;
                                info.op.rdma_write.num_lo_sges = ib_wr->num_sge;
                                info.op.rdma_write.rem_addr.tag_off = rdma_wr(ib_wr)->remote_addr;
                                info.op.rdma_write.rem_addr.stag = rdma_wr(ib_wr)->rkey;
                                ret = ukqp->ops.iw_rdma_write(ukqp, &info, false);
                        }

                        if (ret) {
                                if (ret == I40IW_ERR_QP_TOOMANY_WRS_POSTED)
                                        err = -ENOMEM;
                                else
                                        err = -EINVAL;
                        }
                        break;
                case IB_WR_RDMA_READ_WITH_INV:
                        inv_stag = true;
                        /* fall-through*/
                case IB_WR_RDMA_READ:
                        if (ib_wr->num_sge > I40IW_MAX_SGE_RD) {
                                err = -EINVAL;
                                break;
                        }
                        info.op_type = I40IW_OP_TYPE_RDMA_READ;
                        info.op.rdma_read.rem_addr.tag_off = rdma_wr(ib_wr)->remote_addr;
                        info.op.rdma_read.rem_addr.stag = rdma_wr(ib_wr)->rkey;
                        info.op.rdma_read.lo_addr.tag_off = ib_wr->sg_list->addr;
                        info.op.rdma_read.lo_addr.stag = ib_wr->sg_list->lkey;
                        info.op.rdma_read.lo_addr.len = ib_wr->sg_list->length;
                        ret = ukqp->ops.iw_rdma_read(ukqp, &info, inv_stag, false);
                        if (ret) {
                                if (ret == I40IW_ERR_QP_TOOMANY_WRS_POSTED)
                                        err = -ENOMEM;
                                else
                                        err = -EINVAL;
                        }
                        break;
                case IB_WR_LOCAL_INV:
                        info.op_type = I40IW_OP_TYPE_INV_STAG;
                        info.op.inv_local_stag.target_stag = ib_wr->ex.invalidate_rkey;
                        ret = ukqp->ops.iw_stag_local_invalidate(ukqp, &info, true);
                        if (ret)
                                err = -ENOMEM;
                        break;
                case IB_WR_REG_MR:
                {
                        struct i40iw_mr *iwmr = to_iwmr(reg_wr(ib_wr)->mr);
                        int flags = reg_wr(ib_wr)->access;
                        struct i40iw_pble_alloc *palloc = &iwmr->iwpbl.pble_alloc;
                        struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
                        struct i40iw_fast_reg_stag_info info;

                        memset(&info, 0, sizeof(info));
                        info.access_rights = I40IW_ACCESS_FLAGS_LOCALREAD;
                        info.access_rights |= i40iw_get_user_access(flags);
                        info.stag_key = reg_wr(ib_wr)->key & 0xff;
                        info.stag_idx = reg_wr(ib_wr)->key >> 8;
                        info.page_size = reg_wr(ib_wr)->mr->page_size;
                        info.wr_id = ib_wr->wr_id;

                        info.addr_type = I40IW_ADDR_TYPE_VA_BASED;
                        info.va = (void *)(uintptr_t)iwmr->ibmr.iova;
                        info.total_len = iwmr->ibmr.length;
                        info.reg_addr_pa = *(u64 *)palloc->level1.addr;
                        info.first_pm_pbl_index = palloc->level1.idx;
                        info.local_fence = ib_wr->send_flags & IB_SEND_FENCE;
                        info.signaled = ib_wr->send_flags & IB_SEND_SIGNALED;

                        if (iwmr->npages > I40IW_MIN_PAGES_PER_FMR)
                                info.chunk_size = 1;

                        ret = dev->iw_priv_qp_ops->iw_mr_fast_register(&iwqp->sc_qp, &info, true);
                        if (ret)
                                err = -ENOMEM;
                        break;
                }
                default:
                        err = -EINVAL;
                        i40iw_pr_err(" upost_send bad opcode = 0x%x\n",
                                     ib_wr->opcode);
                        break;
                }

                if (err)
                        break;
                ib_wr = ib_wr->next;
        }

out:
        if (err)
                *bad_wr = ib_wr;
        else
                ukqp->ops.iw_qp_post_wr(ukqp);
        spin_unlock_irqrestore(&iwqp->lock, flags);

        return err;
}

/**
 * i40iw_post_recv - post receive wr for kernel application
 * @ibqp: ib qp pointer
 * @ib_wr: work request for receive
 * @bad_wr: bad wr caused an error
 */
static int i40iw_post_recv(struct ib_qp *ibqp,
                           struct ib_recv_wr *ib_wr,
                           struct ib_recv_wr **bad_wr)
{
        struct i40iw_qp *iwqp;
        struct i40iw_qp_uk *ukqp;
        struct i40iw_post_rq_info post_recv;
        struct i40iw_sge sg_list[I40IW_MAX_WQ_FRAGMENT_COUNT];
        enum i40iw_status_code ret = 0;
        unsigned long flags;
        int err = 0;

        iwqp = (struct i40iw_qp *)ibqp;
        ukqp = &iwqp->sc_qp.qp_uk;

        memset(&post_recv, 0, sizeof(post_recv));
        spin_lock_irqsave(&iwqp->lock, flags);

        if (iwqp->flush_issued) {
                err = -EINVAL;
                goto out;
        }

        while (ib_wr) {
                post_recv.num_sges = ib_wr->num_sge;
                post_recv.wr_id = ib_wr->wr_id;
                i40iw_copy_sg_list(sg_list, ib_wr->sg_list, ib_wr->num_sge);
                post_recv.sg_list = sg_list;
                ret = ukqp->ops.iw_post_receive(ukqp, &post_recv);
                if (ret) {
                        i40iw_pr_err(" post_recv err %d\n", ret);
                        if (ret == I40IW_ERR_QP_TOOMANY_WRS_POSTED)
                                err = -ENOMEM;
                        else
                                err = -EINVAL;
                        *bad_wr = ib_wr;
                        goto out;
                }
                ib_wr = ib_wr->next;
        }
 out:
        spin_unlock_irqrestore(&iwqp->lock, flags);
        return err;
}

/**
 * i40iw_poll_cq - poll cq for completion (kernel apps)
 * @ibcq: cq to poll
 * @num_entries: number of entries to poll
 * @entry: wr of entry completed
 */
static int i40iw_poll_cq(struct ib_cq *ibcq,
                         int num_entries,
                         struct ib_wc *entry)
{
        struct i40iw_cq *iwcq;
        int cqe_count = 0;
        struct i40iw_cq_poll_info cq_poll_info;
        enum i40iw_status_code ret;
        struct i40iw_cq_uk *ukcq;
        struct i40iw_sc_qp *qp;
        struct i40iw_qp *iwqp;
        unsigned long flags;

        iwcq = (struct i40iw_cq *)ibcq;
        ukcq = &iwcq->sc_cq.cq_uk;

        spin_lock_irqsave(&iwcq->lock, flags);
        while (cqe_count < num_entries) {
                ret = ukcq->ops.iw_cq_poll_completion(ukcq, &cq_poll_info);
                if (ret == I40IW_ERR_QUEUE_EMPTY) {
                        break;
                } else if (ret == I40IW_ERR_QUEUE_DESTROYED) {
                        continue;
                } else if (ret) {
                        if (!cqe_count)
                                cqe_count = -1;
                        break;
                }
                entry->wc_flags = 0;
                entry->wr_id = cq_poll_info.wr_id;
                if (cq_poll_info.error) {
                        entry->status = IB_WC_WR_FLUSH_ERR;
                        entry->vendor_err = cq_poll_info.major_err << 16 | cq_poll_info.minor_err;
                } else {
                        entry->status = IB_WC_SUCCESS;
                }

                switch (cq_poll_info.op_type) {
                case I40IW_OP_TYPE_RDMA_WRITE:
                        entry->opcode = IB_WC_RDMA_WRITE;
                        break;
                case I40IW_OP_TYPE_RDMA_READ_INV_STAG:
                case I40IW_OP_TYPE_RDMA_READ:
                        entry->opcode = IB_WC_RDMA_READ;
                        break;
                case I40IW_OP_TYPE_SEND_SOL:
                case I40IW_OP_TYPE_SEND_SOL_INV:
                case I40IW_OP_TYPE_SEND_INV:
                case I40IW_OP_TYPE_SEND:
                        entry->opcode = IB_WC_SEND;
                        break;
                case I40IW_OP_TYPE_REC:
                        entry->opcode = IB_WC_RECV;
                        break;
                default:
                        entry->opcode = IB_WC_RECV;
                        break;
                }

                entry->ex.imm_data = 0;
                qp = (struct i40iw_sc_qp *)cq_poll_info.qp_handle;
                entry->qp = (struct ib_qp *)qp->back_qp;
                entry->src_qp = cq_poll_info.qp_id;
                iwqp = (struct i40iw_qp *)qp->back_qp;
                if (iwqp->iwarp_state > I40IW_QP_STATE_RTS) {
                        if (!I40IW_RING_MORE_WORK(qp->qp_uk.sq_ring))
                                complete(&iwqp->sq_drained);
                        if (!I40IW_RING_MORE_WORK(qp->qp_uk.rq_ring))
                                complete(&iwqp->rq_drained);
                }
                entry->byte_len = cq_poll_info.bytes_xfered;
                entry++;
                cqe_count++;
        }
        spin_unlock_irqrestore(&iwcq->lock, flags);
        return cqe_count;
}

/**
 * i40iw_req_notify_cq - arm cq kernel application
 * @ibcq: cq to arm
 * @notify_flags: notofication flags
 */
static int i40iw_req_notify_cq(struct ib_cq *ibcq,
                               enum ib_cq_notify_flags notify_flags)
{
        struct i40iw_cq *iwcq;
        struct i40iw_cq_uk *ukcq;
        unsigned long flags;
        enum i40iw_completion_notify cq_notify = IW_CQ_COMPL_EVENT;

        iwcq = (struct i40iw_cq *)ibcq;
        ukcq = &iwcq->sc_cq.cq_uk;
        if (notify_flags == IB_CQ_SOLICITED)
                cq_notify = IW_CQ_COMPL_SOLICITED;
        spin_lock_irqsave(&iwcq->lock, flags);
        ukcq->ops.iw_cq_request_notification(ukcq, cq_notify);
        spin_unlock_irqrestore(&iwcq->lock, flags);
        return 0;
}

/**
 * i40iw_port_immutable - return port's immutable data
 * @ibdev: ib dev struct
 * @port_num: port number
 * @immutable: immutable data for the port return
 */
static int i40iw_port_immutable(struct ib_device *ibdev, u8 port_num,
                                struct ib_port_immutable *immutable)
{
        struct ib_port_attr attr;
        int err;

        immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;

        err = ib_query_port(ibdev, port_num, &attr);

        if (err)
                return err;

        immutable->pkey_tbl_len = attr.pkey_tbl_len;
        immutable->gid_tbl_len = attr.gid_tbl_len;

        return 0;
}

static const char * const i40iw_hw_stat_names[] = {
        // 32bit names
        [I40IW_HW_STAT_INDEX_IP4RXDISCARD] = "ip4InDiscards",
        [I40IW_HW_STAT_INDEX_IP4RXTRUNC] = "ip4InTruncatedPkts",
        [I40IW_HW_STAT_INDEX_IP4TXNOROUTE] = "ip4OutNoRoutes",
        [I40IW_HW_STAT_INDEX_IP6RXDISCARD] = "ip6InDiscards",
        [I40IW_HW_STAT_INDEX_IP6RXTRUNC] = "ip6InTruncatedPkts",
        [I40IW_HW_STAT_INDEX_IP6TXNOROUTE] = "ip6OutNoRoutes",
        [I40IW_HW_STAT_INDEX_TCPRTXSEG] = "tcpRetransSegs",
        [I40IW_HW_STAT_INDEX_TCPRXOPTERR] = "tcpInOptErrors",
        [I40IW_HW_STAT_INDEX_TCPRXPROTOERR] = "tcpInProtoErrors",
        // 64bit names
        [I40IW_HW_STAT_INDEX_IP4RXOCTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip4InOctets",
        [I40IW_HW_STAT_INDEX_IP4RXPKTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip4InPkts",
        [I40IW_HW_STAT_INDEX_IP4RXFRAGS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip4InReasmRqd",
        [I40IW_HW_STAT_INDEX_IP4RXMCPKTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip4InMcastPkts",
        [I40IW_HW_STAT_INDEX_IP4TXOCTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip4OutOctets",
        [I40IW_HW_STAT_INDEX_IP4TXPKTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip4OutPkts",
        [I40IW_HW_STAT_INDEX_IP4TXFRAGS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip4OutSegRqd",
        [I40IW_HW_STAT_INDEX_IP4TXMCPKTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip4OutMcastPkts",
        [I40IW_HW_STAT_INDEX_IP6RXOCTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip6InOctets",
        [I40IW_HW_STAT_INDEX_IP6RXPKTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip6InPkts",
        [I40IW_HW_STAT_INDEX_IP6RXFRAGS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip6InReasmRqd",
        [I40IW_HW_STAT_INDEX_IP6RXMCPKTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip6InMcastPkts",
        [I40IW_HW_STAT_INDEX_IP6TXOCTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip6OutOctets",
        [I40IW_HW_STAT_INDEX_IP6TXPKTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip6OutPkts",
        [I40IW_HW_STAT_INDEX_IP6TXFRAGS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip6OutSegRqd",
        [I40IW_HW_STAT_INDEX_IP6TXMCPKTS + I40IW_HW_STAT_INDEX_MAX_32] =
                "ip6OutMcastPkts",
        [I40IW_HW_STAT_INDEX_TCPRXSEGS + I40IW_HW_STAT_INDEX_MAX_32] =
                "tcpInSegs",
        [I40IW_HW_STAT_INDEX_TCPTXSEG + I40IW_HW_STAT_INDEX_MAX_32] =
                "tcpOutSegs",
        [I40IW_HW_STAT_INDEX_RDMARXRDS + I40IW_HW_STAT_INDEX_MAX_32] =
                "iwInRdmaReads",
        [I40IW_HW_STAT_INDEX_RDMARXSNDS + I40IW_HW_STAT_INDEX_MAX_32] =
                "iwInRdmaSends",
        [I40IW_HW_STAT_INDEX_RDMARXWRS + I40IW_HW_STAT_INDEX_MAX_32] =
                "iwInRdmaWrites",
        [I40IW_HW_STAT_INDEX_RDMATXRDS + I40IW_HW_STAT_INDEX_MAX_32] =
                "iwOutRdmaReads",
        [I40IW_HW_STAT_INDEX_RDMATXSNDS + I40IW_HW_STAT_INDEX_MAX_32] =
                "iwOutRdmaSends",
        [I40IW_HW_STAT_INDEX_RDMATXWRS + I40IW_HW_STAT_INDEX_MAX_32] =
                "iwOutRdmaWrites",
        [I40IW_HW_STAT_INDEX_RDMAVBND + I40IW_HW_STAT_INDEX_MAX_32] =
                "iwRdmaBnd",
        [I40IW_HW_STAT_INDEX_RDMAVINV + I40IW_HW_STAT_INDEX_MAX_32] =
                "iwRdmaInv"
};

static void i40iw_get_dev_fw_str(struct ib_device *dev, char *str)
{
        u32 firmware_version = I40IW_FW_VERSION;

        snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u", firmware_version,
                 (firmware_version & 0x000000ff));
}

/**
 * i40iw_alloc_hw_stats - Allocate a hw stats structure
 * @ibdev: device pointer from stack
 * @port_num: port number
 */
static struct rdma_hw_stats *i40iw_alloc_hw_stats(struct ib_device *ibdev,
                                                  u8 port_num)
{
        struct i40iw_device *iwdev = to_iwdev(ibdev);
        struct i40iw_sc_dev *dev = &iwdev->sc_dev;
        int num_counters = I40IW_HW_STAT_INDEX_MAX_32 +
                I40IW_HW_STAT_INDEX_MAX_64;
        unsigned long lifespan = RDMA_HW_STATS_DEFAULT_LIFESPAN;

        BUILD_BUG_ON(ARRAY_SIZE(i40iw_hw_stat_names) !=
                     (I40IW_HW_STAT_INDEX_MAX_32 +
                      I40IW_HW_STAT_INDEX_MAX_64));

        /*
         * PFs get the default update lifespan, but VFs only update once
         * per second
         */
        if (!dev->is_pf)
                lifespan = 1000;
        return rdma_alloc_hw_stats_struct(i40iw_hw_stat_names, num_counters,
                                          lifespan);
}

/**
 * i40iw_get_hw_stats - Populates the rdma_hw_stats structure
 * @ibdev: device pointer from stack
 * @stats: stats pointer from stack
 * @port_num: port number
 * @index: which hw counter the stack is requesting we update
 */
static int i40iw_get_hw_stats(struct ib_device *ibdev,
                              struct rdma_hw_stats *stats,
                              u8 port_num, int index)
{
        struct i40iw_device *iwdev = to_iwdev(ibdev);
        struct i40iw_sc_dev *dev = &iwdev->sc_dev;
        struct i40iw_vsi_pestat *devstat = iwdev->vsi.pestat;
        struct i40iw_dev_hw_stats *hw_stats = &devstat->hw_stats;

        if (dev->is_pf) {
                i40iw_hw_stats_read_all(devstat, &devstat->hw_stats);
        } else {
                if (i40iw_vchnl_vf_get_pe_stats(dev, &devstat->hw_stats))
                        return -ENOSYS;
        }

        memcpy(&stats->value[0], hw_stats, sizeof(*hw_stats));

        return stats->num_counters;
}

/**
 * i40iw_query_gid - Query port GID
 * @ibdev: device pointer from stack
 * @port: port number
 * @index: Entry index
 * @gid: Global ID
 */
static int i40iw_query_gid(struct ib_device *ibdev,
                           u8 port,
                           int index,
                           union ib_gid *gid)
{
        struct i40iw_device *iwdev = to_iwdev(ibdev);

        memset(gid->raw, 0, sizeof(gid->raw));
        ether_addr_copy(gid->raw, iwdev->netdev->dev_addr);
        return 0;
}

/**
 * i40iw_modify_port  Modify port properties
 * @ibdev: device pointer from stack
 * @port: port number
 * @port_modify_mask: mask for port modifications
 * @props: port properties
 */
static int i40iw_modify_port(struct ib_device *ibdev,
                             u8 port,
                             int port_modify_mask,
                             struct ib_port_modify *props)
{
        return -ENOSYS;
}

/**
 * i40iw_query_pkey - Query partition key
 * @ibdev: device pointer from stack
 * @port: port number
 * @index: index of pkey
 * @pkey: pointer to store the pkey
 */
static int i40iw_query_pkey(struct ib_device *ibdev,
                            u8 port,
                            u16 index,
                            u16 *pkey)
{
        *pkey = 0;
        return 0;
}

/**
 * i40iw_create_ah - create address handle
 * @ibpd: ptr of pd
 * @ah_attr: address handle attributes
 */
static struct ib_ah *i40iw_create_ah(struct ib_pd *ibpd,
                                     struct rdma_ah_attr *attr,
                                     struct ib_udata *udata)

{
        return ERR_PTR(-ENOSYS);
}

/**
 * i40iw_destroy_ah - Destroy address handle
 * @ah: pointer to address handle
 */
static int i40iw_destroy_ah(struct ib_ah *ah)
{
        return -ENOSYS;
}

/**
 * i40iw_get_vector_affinity - report IRQ affinity mask
 * @ibdev: IB device
 * @comp_vector: completion vector index
 */
static const struct cpumask *i40iw_get_vector_affinity(struct ib_device *ibdev,
                                                       int comp_vector)
{
        struct i40iw_device *iwdev = to_iwdev(ibdev);
        struct i40iw_msix_vector *msix_vec;

        if (iwdev->msix_shared)
                msix_vec = &iwdev->iw_msixtbl[comp_vector];
        else
                msix_vec = &iwdev->iw_msixtbl[comp_vector + 1];

        return irq_get_affinity_mask(msix_vec->irq);
}

/**
 * i40iw_init_rdma_device - initialization of iwarp device
 * @iwdev: iwarp device
 */
static struct i40iw_ib_device *i40iw_init_rdma_device(struct i40iw_device *iwdev)
{
        struct i40iw_ib_device *iwibdev;
        struct net_device *netdev = iwdev->netdev;
        struct pci_dev *pcidev = (struct pci_dev *)iwdev->hw.dev_context;

        iwibdev = (struct i40iw_ib_device *)ib_alloc_device(sizeof(*iwibdev));
        if (!iwibdev) {
                i40iw_pr_err("iwdev == NULL\n");
                return NULL;
        }
        strlcpy(iwibdev->ibdev.name, "i40iw%d", IB_DEVICE_NAME_MAX);
        iwibdev->ibdev.owner = THIS_MODULE;
        iwdev->iwibdev = iwibdev;
        iwibdev->iwdev = iwdev;

        iwibdev->ibdev.node_type = RDMA_NODE_RNIC;
        ether_addr_copy((u8 *)&iwibdev->ibdev.node_guid, netdev->dev_addr);

        iwibdev->ibdev.uverbs_cmd_mask =
            (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
            (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
            (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
            (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
            (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
            (1ull << IB_USER_VERBS_CMD_REG_MR) |
            (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
            (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
            (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
            (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
            (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
            (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
            (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
            (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
            (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
            (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
            (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
            (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
            (1ull << IB_USER_VERBS_CMD_POST_RECV) |
            (1ull << IB_USER_VERBS_CMD_POST_SEND);
        iwibdev->ibdev.phys_port_cnt = 1;
        iwibdev->ibdev.num_comp_vectors = iwdev->ceqs_count;
        iwibdev->ibdev.dev.parent = &pcidev->dev;
        iwibdev->ibdev.query_port = i40iw_query_port;
        iwibdev->ibdev.modify_port = i40iw_modify_port;
        iwibdev->ibdev.query_pkey = i40iw_query_pkey;
        iwibdev->ibdev.query_gid = i40iw_query_gid;
        iwibdev->ibdev.alloc_ucontext = i40iw_alloc_ucontext;
        iwibdev->ibdev.dealloc_ucontext = i40iw_dealloc_ucontext;
        iwibdev->ibdev.mmap = i40iw_mmap;
        iwibdev->ibdev.alloc_pd = i40iw_alloc_pd;
        iwibdev->ibdev.dealloc_pd = i40iw_dealloc_pd;
        iwibdev->ibdev.create_qp = i40iw_create_qp;
        iwibdev->ibdev.modify_qp = i40iw_modify_qp;
        iwibdev->ibdev.query_qp = i40iw_query_qp;
        iwibdev->ibdev.destroy_qp = i40iw_destroy_qp;
        iwibdev->ibdev.create_cq = i40iw_create_cq;
        iwibdev->ibdev.destroy_cq = i40iw_destroy_cq;
        iwibdev->ibdev.get_dma_mr = i40iw_get_dma_mr;
        iwibdev->ibdev.reg_user_mr = i40iw_reg_user_mr;
        iwibdev->ibdev.dereg_mr = i40iw_dereg_mr;
        iwibdev->ibdev.alloc_hw_stats = i40iw_alloc_hw_stats;
        iwibdev->ibdev.get_hw_stats = i40iw_get_hw_stats;
        iwibdev->ibdev.query_device = i40iw_query_device;
        iwibdev->ibdev.create_ah = i40iw_create_ah;
        iwibdev->ibdev.destroy_ah = i40iw_destroy_ah;
        iwibdev->ibdev.drain_sq = i40iw_drain_sq;
        iwibdev->ibdev.drain_rq = i40iw_drain_rq;
        iwibdev->ibdev.alloc_mr = i40iw_alloc_mr;
        iwibdev->ibdev.map_mr_sg = i40iw_map_mr_sg;
        iwibdev->ibdev.iwcm = kzalloc(sizeof(*iwibdev->ibdev.iwcm), GFP_KERNEL);
        if (!iwibdev->ibdev.iwcm) {
                ib_dealloc_device(&iwibdev->ibdev);
                return NULL;
        }

        iwibdev->ibdev.iwcm->add_ref = i40iw_add_ref;
        iwibdev->ibdev.iwcm->rem_ref = i40iw_rem_ref;
        iwibdev->ibdev.iwcm->get_qp = i40iw_get_qp;
        iwibdev->ibdev.iwcm->connect = i40iw_connect;
        iwibdev->ibdev.iwcm->accept = i40iw_accept;
        iwibdev->ibdev.iwcm->reject = i40iw_reject;
        iwibdev->ibdev.iwcm->create_listen = i40iw_create_listen;
        iwibdev->ibdev.iwcm->destroy_listen = i40iw_destroy_listen;
        memcpy(iwibdev->ibdev.iwcm->ifname, netdev->name,
               sizeof(iwibdev->ibdev.iwcm->ifname));
        iwibdev->ibdev.get_port_immutable   = i40iw_port_immutable;
        iwibdev->ibdev.get_dev_fw_str       = i40iw_get_dev_fw_str;
        iwibdev->ibdev.poll_cq = i40iw_poll_cq;
        iwibdev->ibdev.req_notify_cq = i40iw_req_notify_cq;
        iwibdev->ibdev.post_send = i40iw_post_send;
        iwibdev->ibdev.post_recv = i40iw_post_recv;
        iwibdev->ibdev.get_vector_affinity = i40iw_get_vector_affinity;

        return iwibdev;
}

/**
 * i40iw_port_ibevent - indicate port event
 * @iwdev: iwarp device
 */
void i40iw_port_ibevent(struct i40iw_device *iwdev)
{
        struct i40iw_ib_device *iwibdev = iwdev->iwibdev;
        struct ib_event event;

        event.device = &iwibdev->ibdev;
        event.element.port_num = 1;
        event.event = iwdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
        ib_dispatch_event(&event);
}

/**
 * i40iw_unregister_rdma_device - unregister of iwarp from IB
 * @iwibdev: rdma device ptr
 */
static void i40iw_unregister_rdma_device(struct i40iw_ib_device *iwibdev)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(i40iw_dev_attributes); ++i)
                device_remove_file(&iwibdev->ibdev.dev,
                                   i40iw_dev_attributes[i]);
        ib_unregister_device(&iwibdev->ibdev);
}

/**
 * i40iw_destroy_rdma_device - destroy rdma device and free resources
 * @iwibdev: IB device ptr
 */
void i40iw_destroy_rdma_device(struct i40iw_ib_device *iwibdev)
{
        if (!iwibdev)
                return;

        i40iw_unregister_rdma_device(iwibdev);
        kfree(iwibdev->ibdev.iwcm);
        iwibdev->ibdev.iwcm = NULL;
        wait_event_timeout(iwibdev->iwdev->close_wq,
                           !atomic64_read(&iwibdev->iwdev->use_count),
                           I40IW_EVENT_TIMEOUT);
        ib_dealloc_device(&iwibdev->ibdev);
}

/**
 * i40iw_register_rdma_device - register iwarp device to IB
 * @iwdev: iwarp device
 */
int i40iw_register_rdma_device(struct i40iw_device *iwdev)
{
        int i, ret;
        struct i40iw_ib_device *iwibdev;

        iwdev->iwibdev = i40iw_init_rdma_device(iwdev);
        if (!iwdev->iwibdev)
                return -ENOMEM;
        iwibdev = iwdev->iwibdev;

        iwibdev->ibdev.driver_id = RDMA_DRIVER_I40IW;
        ret = ib_register_device(&iwibdev->ibdev, NULL);
        if (ret)
                goto error;

        for (i = 0; i < ARRAY_SIZE(i40iw_dev_attributes); ++i) {
                ret =
                    device_create_file(&iwibdev->ibdev.dev,
                                       i40iw_dev_attributes[i]);
                if (ret) {
                        while (i > 0) {
                                i--;
                                device_remove_file(&iwibdev->ibdev.dev, i40iw_dev_attributes[i]);
                        }
                        ib_unregister_device(&iwibdev->ibdev);
                        goto error;
                }
        }
        return 0;
error:
        kfree(iwdev->iwibdev->ibdev.iwcm);
        iwdev->iwibdev->ibdev.iwcm = NULL;
        ib_dealloc_device(&iwdev->iwibdev->ibdev);
        return ret;
}