linux/drivers/infiniband/hw/i40iw/i40iw_verbs.c

/*******************************************************************************
*
* 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 <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->vendor_id;
	props->vendor_part_id = iwdev->vendor_part_id;
	props->hw_ver = (u32)iwdev->sc_dev.hw_rev;
	props->max_mr_size = I40IW_MAX_OUTBOUND_MESSAGE_SIZE;
	props->max_qp = iwdev->max_qp;
	props->max_qp_wr = (I40IW_MAX_WQ_ENTRIES >> 2) - 1;
	props->max_sge = I40IW_MAX_WQ_FRAGMENT_COUNT;
	props->max_cq = iwdev->max_cq;
	props->max_cqe = iwdev->max_cqe;
	props->max_mr = iwdev->max_mr;
	props->max_pd = iwdev->max_pd;
	props->max_sge_rd = 1;
	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;
	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;

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

	props->max_mtu = IB_MTU_4096;
	if (netdev->mtu >= 4096)
		props->active_mtu = IB_MTU_4096;
	else if (netdev->mtu >= 2048)
		props->active_mtu = IB_MTU_2048;
	else if (netdev->mtu >= 1024)
		props->active_mtu = IB_MTU_1024;
	else if (netdev->mtu >= 512)
		props->active_mtu = IB_MTU_512;
	else
		props->active_mtu = IB_MTU_256;

	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 = 0x80000000;
	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 != I40IW_ABI_USERSPACE_VER) {
		i40iw_pr_err("Invalid userspace driver version detected. Detected version %d, should be %d\n",
			     req.userspace_ver, I40IW_ABI_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 = I40IW_ABI_KERNEL_VER;

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

	ucontext->iwdev = iwdev;

	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;
	struct i40iw_sc_dev *dev = &iwdev->sc_dev;
	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 = dev->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;
	struct i40iw_sc_dev *dev = &iwdev->sc_dev;
	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 = dev->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;
	u32 pd_id = 0;
	int err;

	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;
	dev->iw_pd_ops->pd_init(dev, sc_pd, pd_id);

	if (context) {
		memset(&uresp, 0, sizeof(uresp));
		uresp.pd_id = pd_id;
		if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
			err = -EFAULT;
			goto error;
		}
	}

	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_qp_roundup - return round up qp ring size
 * @wr_ring_size: ring size to round up
 */
static int i40iw_qp_roundup(u32 wr_ring_size)
{
	int scount = 1;

	if (wr_ring_size < I40IWQP_SW_MIN_WQSIZE)
		wr_ring_size = I40IWQP_SW_MIN_WQSIZE;

	for (wr_ring_size--; scount <= 16; scount *= 2)
		wr_ring_size |= wr_ring_size >> scount;
	return ++wr_ring_size;
}

/**
 * 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) {
			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)
{
	i40iw_dealloc_push_page(iwdev, &iwqp->sc_qp);
	if (qp_num)
		i40iw_free_resource(iwdev, iwdev->allocated_qps, qp_num);
	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);
	iwqp->allocated_buffer = NULL;
}

/**
 * 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;
	u32 sq_size, rq_size;
	u8 sqshift, rqshift;
	u32 size;
	enum i40iw_status_code status;
	struct i40iw_qp_uk_init_info *ukinfo = &info->qp_uk_init_info;

	ukinfo->max_sq_frag_cnt = I40IW_MAX_WQ_FRAGMENT_COUNT;

	sq_size = i40iw_qp_roundup(ukinfo->sq_size + 1);
	rq_size = i40iw_qp_roundup(ukinfo->rq_size + 1);

	status = i40iw_get_wqe_shift(sq_size, ukinfo->max_sq_frag_cnt, &sqshift);
	if (!status)
		status = i40iw_get_wqe_shift(rq_size, ukinfo->max_rq_frag_cnt, &rqshift);

	if (status)
		return -ENOSYS;

	sqdepth = sq_size << sqshift;
	rqdepth = rq_size << rqshift;

	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 = sq_size;
	ukinfo->rq_size = rq_size;
	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 (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;

	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.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;

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

	iwqp = (struct i40iw_qp *)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->allocated_buffer = mem;
	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 = -ENOSYS;
		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) {
				spin_lock_irqsave(
				    &ucontext->qp_reg_mem_list_lock, flags);
				iwqp->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 (!iwqp->iwpbl) {
					err_code = -ENODATA;
					i40iw_pr_err("no pbl info\n");
					goto error;
				}
			}
		}
		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->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);
	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);
		}
	}

	return &iwqp->ibqp;
error:
	i40iw_free_qp_resources(iwdev, iwqp, qp_num);
	kfree(mem);
	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_recv_sge = 1;
	attr->cap.max_inline_data = I40IW_MAX_INLINE_DATA_SIZE;
	init_attr->event_handler = iwqp->ibqp.event_handler;
	init_attr->qp_context = iwqp->ibqp.qp_context;
	init_attr->send_cq = iwqp->ibqp.send_cq;
	init_attr->recv_cq = iwqp->ibqp.recv_cq;
	init_attr->srq = iwqp->ibqp.srq;
	init_attr->cap = attr->cap;
	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)
{
	enum i40iw_status_code status;
	struct i40iw_cqp_request *cqp_request;
	struct cqp_commands_info *cqp_info;
	struct i40iw_modify_qp_info *m_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;
	status = i40iw_handle_cqp_op(iwdev, cqp_request);
	if (status)
		i40iw_pr_err("CQP-OP Modify QP fail");
}

/**
 * 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) {
		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)
				del_timer(&iwqp->terminate_timer);
			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 (issue_modify_qp)
			iwqp->iwarp_state = info.next_iwarp_state;
		else
			info.next_iwarp_state = iwqp->iwarp_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);

	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);
			}
		}
	}
	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);
}

/**
 * cq_wq_destroy - send cq destroy cqp
 * @iwdev: iwarp device
 * @cq: hardware control cq
 */
static void 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;
	cq_wq_destroy(iwdev, cq);
	cq_free_resources(iwdev, iwcq);
	kfree(iwcq);
	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 (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;
	info.ceq_id = 0;
	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)))
			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;
		}
	}

	return (struct ib_cq *)iwcq;

cq_destroy:
	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_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;
	}
	return stag;
}

/**
 * i40iw_next_pbl_addr - Get next pbl address
 * @palloc: Poiner to allocated pbles
 * @pbl: pointer to a pble
 * @pinfo: info pointer
 * @idx: index
 */
static inline u64 *i40iw_next_pbl_addr(struct i40iw_pble_alloc *palloc,
				       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, pg_shift, i;
	struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
	struct i40iw_pble_info *pinfo;
	struct scatterlist *sg;
	u32 idx = 0;

	pinfo = (level == I40IW_LEVEL_1) ? NULL : palloc->level2.leaf;
	pg_shift = ffs(region->page_size) - 1;
	for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
		chunk_pages = sg_dma_len(sg) >> pg_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++) {
			*pbl = cpu_to_le64(sg_dma_address(sg) + region->page_size * i);
			pbl = i40iw_next_pbl_addr(palloc, pbl, &pinfo, &idx);
		}
	}
}

/**
 * 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 or memory (level 0)
 */
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 && (iwmr->page_cnt > MAX_SAVE_PAGE_ADDRS))
		return -ENOMEM;

	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);
	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;
	int err;
	int total;

	total = req->sq_pages + req->rq_pages + req->cq_pages;

	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 (req->reg_type == IW_MEMREG_TYPE_QP) {
		hmc_p = &qpmr->sq_pbl;
		qpmr->shadow = (dma_addr_t)arr[total];
		if (use_pbles) {
			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[1];
		}
	} else {		/* CQ */
		hmc_p = &cqmr->cq_pbl;
		cqmr->shadow = (dma_addr_t)arr[total];
		if (use_pbles)
			hmc_p->idx = palloc->level1.idx;
		else
			hmc_p->addr = arr[0];
	}
	return err;
}

/**
 * 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;

	if (iwmr->page_cnt > 1) {
		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;

	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);
	region_length = region->length + (start & 0xfff);
	pbl_depth = region_length >> 12;
	pbl_depth += (region_length & (4096 - 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);
		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);
		spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
		break;
	case IW_MEMREG_TYPE_MEM:
		access = I40IW_ACCESS_FLAGS_LOCALREAD;

		use_pbles = (iwmr->page_cnt != 1);
		err = i40iw_setup_pbles(iwdev, iwmr, use_pbles);
		if (err)
			goto error;

		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)
		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;
	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, 0xffffffffffULL, 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 (!list_empty(&ucontext->cq_reg_mem_list))
			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 (!list_empty(&ucontext->qp_reg_mem_list))
			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)
			i40iw_free_pble(iwdev->pble_rsrc, palloc);
		kfree(iwpbl->iwmr);
		iwpbl->iwmr = NULL;
		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_fw_ver
 */
static ssize_t i40iw_show_fw_ver(struct device *dev,
				 struct device_attribute *attr, char *buf)
{
	u32 firmware_version = I40IW_FW_VERSION;

	return sprintf(buf, "%u.%u\n", firmware_version,
		       (firmware_version & 0x000000ff));
}

/**
 * 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(fw_ver, S_IRUGO, i40iw_show_fw_ver, 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_fw_ver,
	&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;

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

	spin_lock_irqsave(&iwqp->lock, flags);
	while (ib_wr) {
		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:
			if (ib_wr->send_flags & IB_SEND_SOLICITED)
				info.op_type = I40IW_OP_TYPE_SEND_SOL;
			else
				info.op_type = I40IW_OP_TYPE_SEND;

			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, rdma_wr(ib_wr)->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, rdma_wr(ib_wr)->rkey, false);
			}

			if (ret)
				err = -EIO;
			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;
				info.op.inline_rdma_write.rem_addr.len = ib_wr->sg_list->length;
				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;
				info.op.rdma_write.rem_addr.len = ib_wr->sg_list->length;
				ret = ukqp->ops.iw_rdma_write(ukqp, &info, false);
			}

			if (ret)
				err = -EIO;
			break;
		case IB_WR_RDMA_READ:
			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.rem_addr.len = ib_wr->sg_list->length;
			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, false, false);
			if (ret)
				err = -EIO;
			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;
	}

	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;

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

	memset(&post_recv, 0, sizeof(post_recv));
	spin_lock_irqsave(&iwqp->lock, flags);
	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);
			*bad_wr = ib_wr;
			goto out;
		}
		ib_wr = ib_wr->next;
	}
 out:
	spin_unlock_irqrestore(&iwqp->lock, flags);
	if (ret)
		return -ENOSYS;
	return 0;
}

/**
 * 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;
	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, true);
		if (ret == I40IW_ERR_QUEUE_EMPTY) {
			break;
		} 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_SUCCESS;
		else
			entry->status = IB_WC_WR_FLUSH_ERR;

		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->vendor_err =
		    cq_poll_info.major_err << 16 | cq_poll_info.minor_err;
		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;
		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;
	enum i40iw_completion_notify cq_notify = IW_CQ_COMPL_SOLICITED;

	iwcq = (struct i40iw_cq *)ibcq;
	ukcq = &iwcq->sc_cq.cq_uk;
	if (notify_flags == IB_CQ_NEXT_COMP)
		cq_notify = IW_CQ_COMPL_EVENT;
	ukcq->ops.iw_cq_request_notification(ukcq, cq_notify);
	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;

	err = i40iw_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;
	immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;

	return 0;
}

/**
 * i40iw_get_protocol_stats - Populates the rdma_stats structure
 * @ibdev: ib dev struct
 * @stats: iw protocol stats struct
 */
static int i40iw_get_protocol_stats(struct ib_device *ibdev,
				    union rdma_protocol_stats *stats)
{
	struct i40iw_device *iwdev = to_iwdev(ibdev);
	struct i40iw_sc_dev *dev = &iwdev->sc_dev;
	struct i40iw_dev_pestat *devstat = &dev->dev_pestat;
	struct i40iw_dev_hw_stats *hw_stats = &devstat->hw_stats;
	struct timespec curr_time;
	static struct timespec last_rd_time = {0, 0};
	enum i40iw_status_code status = 0;
	unsigned long flags;

	curr_time = current_kernel_time();
	memset(stats, 0, sizeof(*stats));

	if (dev->is_pf) {
		spin_lock_irqsave(&devstat->stats_lock, flags);
		devstat->ops.iw_hw_stat_read_all(devstat,
			&devstat->hw_stats);
		spin_unlock_irqrestore(&devstat->stats_lock, flags);
	} else {
		if (((u64)curr_time.tv_sec - (u64)last_rd_time.tv_sec) > 1)
			status = i40iw_vchnl_vf_get_pe_stats(dev,
							     &devstat->hw_stats);

		if (status)
			return -ENOSYS;
	}

	stats->iw.ipInReceives = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4RXPKTS] +
				 hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6RXPKTS];
	stats->iw.ipInTruncatedPkts = hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP4RXTRUNC] +
				      hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP6RXTRUNC];
	stats->iw.ipInDiscards = hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP4RXDISCARD] +
				 hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP6RXDISCARD];
	stats->iw.ipOutNoRoutes = hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP4TXNOROUTE] +
				  hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP6TXNOROUTE];
	stats->iw.ipReasmReqds = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4RXFRAGS] +
				 hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6RXFRAGS];
	stats->iw.ipFragCreates = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4TXFRAGS] +
				  hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6TXFRAGS];
	stats->iw.ipInMcastPkts = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4RXMCPKTS] +
				  hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6RXMCPKTS];
	stats->iw.ipOutMcastPkts = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4TXMCPKTS] +
				   hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6TXMCPKTS];
	stats->iw.tcpOutSegs = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_TCPTXSEG];
	stats->iw.tcpInSegs = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_TCPRXSEGS];
	stats->iw.tcpRetransSegs = hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_TCPRTXSEG];

	last_rd_time = curr_time;
	return 0;
}

/**
 * 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 0;
}

/**
 * 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 ib_ah_attr *attr)
{
	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_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 = 1;
	iwibdev->ibdev.dma_device = &pcidev->dev;
	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.get_protocol_stats = i40iw_get_protocol_stats;
	iwibdev->ibdev.query_device = i40iw_query_device;
	iwibdev->ibdev.create_ah = i40iw_create_ah;
	iwibdev->ibdev.destroy_ah = i40iw_destroy_ah;
	iwibdev->ibdev.iwcm = kzalloc(sizeof(*iwibdev->ibdev.iwcm), GFP_KERNEL);
	if (!iwibdev->ibdev.iwcm) {
		ib_dealloc_device(&iwibdev->ibdev);
		i40iw_pr_err("iwcm == NULL\n");
		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.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;

	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;
	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 -ENOSYS;
	iwibdev = iwdev->iwibdev;

	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 -ENOSYS;
}