[PATCH 6/9] ocrdma: Driver for Emulex OneConnect RDMA adapter

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From: Parav Pandit <parav.pandit@xxxxxxxxxx>

- rdma verbs interface with stack

Signed-off-by: Parav Pandit <parav.pandit@xxxxxxxxxx>
---
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 2542 +++++++++++++++++++++++++++
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.h |   94 +
 2 files changed, 2636 insertions(+), 0 deletions(-)
 create mode 100644 drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
 create mode 100644 drivers/infiniband/hw/ocrdma/ocrdma_verbs.h

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
new file mode 100644
index 0000000..51fc9c7
--- /dev/null
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -0,0 +1,2542 @@
+/*******************************************************************
+ * This file is part of the Emulex RoCE Device Driver for          *
+ * RoCE (RDMA over Converged Ethernet) adapters.                   *
+ * Copyright (C) 2008-2012 Emulex. All rights reserved.            *
+ * EMULEX and SLI are trademarks of Emulex.                        *
+ * www.emulex.com                                                  *
+ *                                                                 *
+ * This program is free software; you can redistribute it and/or   *
+ * modify it under the terms of version 2 of the GNU General       *
+ * Public License as published by the Free Software Foundation.    *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
+ * more details, a copy of which can be found in the file COPYING  *
+ * included with this package.                                     *
+ *
+ * Contact Information:
+ * linux-drivers@xxxxxxxxxx
+ *
+ * Emulex
+ * 3333 Susan Street
+ * Costa Mesa, CA 92626
+ *******************************************************************/
+
+#include <linux/dma-mapping.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/iw_cm.h>
+#include <rdma/ib_umem.h>
+#include <rdma/ib_addr.h>
+
+#include "ocrdma.h"
+#include "ocrdma_hw.h"
+#include "ocrdma_verbs.h"
+#include "ocrdma_abi.h"
+
+int ocrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
+{
+	if (index > 1)
+		return -EINVAL;
+
+	*pkey = 0xffff;
+	return 0;
+}
+
+int ocrdma_query_gid(struct ib_device *ibdev, u8 port,
+		     int index, union ib_gid *sgid)
+{
+	struct ocrdma_dev *dev;
+
+	dev = get_ocrdma_dev(ibdev);
+	memset(sgid, 0, sizeof(*sgid));
+	if (index > OCRDMA_MAX_SGID)
+		return -EINVAL;
+
+	memcpy(sgid, &dev->sgid_tbl[index], sizeof(*sgid));
+
+	return 0;
+}
+
+int ocrdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr)
+{
+	struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
+
+	memset(attr, 0, sizeof *attr);
+	memcpy(&attr->fw_ver, &dev->attr.fw_ver[0],
+	       min(sizeof(dev->attr.fw_ver), sizeof(attr->fw_ver)));
+	ocrdma_get_guid(dev, (u8 *)&attr->sys_image_guid);
+	attr->max_mr_size = ~0ull;
+	attr->page_size_cap = 0xffff000;
+	attr->vendor_id = dev->nic_info.pdev->vendor;
+	attr->vendor_part_id = dev->nic_info.pdev->device;
+	attr->hw_ver = 0;
+	attr->max_qp = dev->attr.max_qp;
+	attr->max_ah = dev->attr.max_qp;
+	attr->max_qp_wr = dev->attr.max_wqe;
+
+	attr->device_cap_flags = IB_DEVICE_CURR_QP_STATE_MOD |
+					IB_DEVICE_RC_RNR_NAK_GEN |
+					IB_DEVICE_SHUTDOWN_PORT |
+					IB_DEVICE_SYS_IMAGE_GUID |
+					IB_DEVICE_LOCAL_DMA_LKEY;
+	attr->max_sge = dev->attr.max_send_sge;
+	attr->max_sge_rd = dev->attr.max_send_sge;
+	attr->max_cq = dev->attr.max_cq;
+	attr->max_cqe = dev->attr.max_cqe;
+	attr->max_mr = dev->attr.max_mr;
+	attr->max_mw = 0;
+	attr->max_pd = dev->attr.max_pd;
+	attr->atomic_cap = 0;
+	attr->max_fmr = 0;
+	attr->max_map_per_fmr = 0;
+	attr->max_qp_rd_atom =
+	    min(dev->attr.max_ord_per_qp, dev->attr.max_ird_per_qp);
+	attr->max_qp_init_rd_atom = dev->attr.max_ord_per_qp;
+	attr->max_srq = (dev->attr.max_qp - 1);
+	attr->max_srq_sge = attr->max_sge;
+	attr->max_srq_wr = dev->attr.max_rqe;
+	attr->local_ca_ack_delay = dev->attr.local_ca_ack_delay;
+	attr->max_fast_reg_page_list_len = 0;
+	attr->max_pkeys = 1;
+	return 0;
+}
+
+int ocrdma_query_port(struct ib_device *ibdev,
+		      u8 port, struct ib_port_attr *props)
+{
+	enum ib_port_state port_state;
+	struct ocrdma_dev *dev;
+	struct net_device *netdev;
+
+	dev = get_ocrdma_dev(ibdev);
+	if (port > 1) {
+		ocrdma_err("%s(%d) invalid_port=0x%x\n", __func__,
+			   dev->id, port);
+		return -EINVAL;
+	}
+	netdev = dev->nic_info.netdev;
+	if (netif_running(netdev) && netif_oper_up(netdev)) {
+		port_state = IB_PORT_ACTIVE;
+		props->phys_state = 5;
+	} else {
+		port_state = IB_PORT_DOWN;
+		props->phys_state = 3;
+	}
+	props->max_mtu = IB_MTU_4096;
+	props->active_mtu = iboe_get_mtu(netdev->mtu);
+	props->lid = 0;
+	props->lmc = 0;
+	props->sm_lid = 0;
+	props->sm_sl = 0;
+	props->state = port_state;
+	props->port_cap_flags =
+	    IB_PORT_CM_SUP |
+	    IB_PORT_REINIT_SUP |
+	    IB_PORT_DEVICE_MGMT_SUP | IB_PORT_VENDOR_CLASS_SUP;
+	props->gid_tbl_len = OCRDMA_MAX_SGID;
+	props->pkey_tbl_len = 1;
+	props->bad_pkey_cntr = 0;
+	props->qkey_viol_cntr = 0;
+	props->active_width = IB_WIDTH_1X;
+	props->active_speed = 4;
+	props->max_msg_sz = 0x80000000;
+	props->max_vl_num = 4;
+	return 0;
+}
+
+int ocrdma_modify_port(struct ib_device *ibdev, u8 port, int mask,
+		       struct ib_port_modify *props)
+{
+	struct ocrdma_dev *dev;
+
+	dev = get_ocrdma_dev(ibdev);
+	if (port > 1) {
+		ocrdma_err("%s(%d) invalid_port=0x%x\n", __func__,
+			   dev->id, port);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int ocrdma_add_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
+			   unsigned long len)
+{
+	struct ocrdma_mm *mm;
+
+	mm = kzalloc(sizeof(*mm), GFP_KERNEL);
+	if (mm == NULL)
+		return -ENOMEM;
+	mm->key.phy_addr = phy_addr;
+	mm->key.len = len;
+	INIT_LIST_HEAD(&mm->entry);
+
+	mutex_lock(&uctx->mm_list_lock);
+	list_add_tail(&mm->entry, &uctx->mm_head);
+	mutex_unlock(&uctx->mm_list_lock);
+	return 0;
+}
+
+static void ocrdma_del_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
+			    unsigned long len)
+{
+	struct ocrdma_mm *mm, *tmp;
+
+	mutex_lock(&uctx->mm_list_lock);
+	list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
+		if (len != mm->key.len || phy_addr != mm->key.phy_addr)
+			continue;
+
+		list_del(&mm->entry);
+		kfree(mm);
+		break;
+	}
+	mutex_unlock(&uctx->mm_list_lock);
+}
+
+static bool ocrdma_search_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
+			      unsigned long len)
+{
+	bool found = false;
+	struct ocrdma_mm *mm;
+
+	mutex_lock(&uctx->mm_list_lock);
+	list_for_each_entry(mm, &uctx->mm_head, entry) {
+		if (len != mm->key.len || phy_addr != mm->key.phy_addr)
+			continue;
+
+		found = true;
+		break;
+	}
+	mutex_unlock(&uctx->mm_list_lock);
+	return found;
+}
+
+struct ib_ucontext *ocrdma_alloc_ucontext(struct ib_device *ibdev,
+					  struct ib_udata *udata)
+{
+	int status;
+	struct ocrdma_ucontext *ctx;
+	struct ocrdma_alloc_ucontext_resp resp;
+	struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
+	struct pci_dev *pdev = dev->nic_info.pdev;
+	u32 map_len = roundup(sizeof(u32) * 2048, PAGE_SIZE);
+
+	if (!udata)
+		return ERR_PTR(-EFAULT);
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return ERR_PTR(-ENOMEM);
+	ctx->dev = dev;
+	INIT_LIST_HEAD(&ctx->mm_head);
+	mutex_init(&ctx->mm_list_lock);
+
+	ctx->ah_tbl.va = dma_alloc_coherent(&pdev->dev, map_len,
+					    &ctx->ah_tbl.pa, GFP_KERNEL);
+	if (!ctx->ah_tbl.va) {
+		kfree(ctx);
+		return ERR_PTR(-ENOMEM);
+	}
+	memset(ctx->ah_tbl.va, 0, map_len);
+	ctx->ah_tbl.len = map_len;
+
+	resp.ah_tbl_len = ctx->ah_tbl.len;
+	resp.ah_tbl_page = ctx->ah_tbl.pa;
+
+	status = ocrdma_add_mmap(ctx, resp.ah_tbl_page, resp.ah_tbl_len);
+	if (status)
+		goto map_err;
+	resp.dev_id = dev->id;
+	resp.max_inline_data = dev->attr.max_inline_data;
+	resp.wqe_size = dev->attr.wqe_size;
+	resp.rqe_size = dev->attr.rqe_size;
+	resp.dpp_wqe_size = dev->attr.wqe_size;
+	resp.rsvd = 0;
+
+	memcpy(resp.fw_ver, dev->attr.fw_ver, sizeof(resp.fw_ver));
+	status = ib_copy_to_udata(udata, &resp, sizeof(resp));
+	if (status)
+		goto cpy_err;
+	return &ctx->ibucontext;
+
+cpy_err:
+	ocrdma_del_mmap(ctx, ctx->ah_tbl.pa, ctx->ah_tbl.len);
+map_err:
+	dma_free_coherent(&pdev->dev, ctx->ah_tbl.len, ctx->ah_tbl.va,
+			  ctx->ah_tbl.pa);
+	kfree(ctx);
+	return ERR_PTR(status);
+}
+
+int ocrdma_dealloc_ucontext(struct ib_ucontext *ibctx)
+{
+	struct ocrdma_mm *mm, *tmp;
+	struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ibctx);
+	struct pci_dev *pdev = uctx->dev->nic_info.pdev;
+
+	ocrdma_del_mmap(uctx, uctx->ah_tbl.pa, uctx->ah_tbl.len);
+	dma_free_coherent(&pdev->dev, uctx->ah_tbl.len, uctx->ah_tbl.va,
+			  uctx->ah_tbl.pa);
+
+	list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
+		list_del(&mm->entry);
+		kfree(mm);
+	}
+	kfree(uctx);
+	return 0;
+}
+
+int ocrdma_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
+{
+	struct ocrdma_ucontext *ucontext = get_ocrdma_ucontext(context);
+	struct ocrdma_dev *dev = ucontext->dev;
+	unsigned long vm_page = vma->vm_pgoff << PAGE_SHIFT;
+	u64 unmapped_db = (u64) dev->nic_info.unmapped_db;
+	unsigned long len = (vma->vm_end - vma->vm_start);
+	int status = 0;
+	bool found;
+
+	if (vma->vm_start & (PAGE_SIZE - 1))
+		return -EINVAL;
+	found = ocrdma_search_mmap(ucontext, vma->vm_pgoff << PAGE_SHIFT, len);
+	if (!found)
+		return -EINVAL;
+
+	if ((vm_page >= unmapped_db) && (vm_page <= (unmapped_db +
+		dev->nic_info.db_total_size)) &&
+		(len <=	dev->nic_info.db_page_size)) {
+		/* doorbell mapping */
+		status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+					    len, vma->vm_page_prot);
+	} else if (dev->nic_info.dpp_unmapped_len &&
+		(vm_page >= (u64) dev->nic_info.dpp_unmapped_addr) &&
+		(vm_page <= (u64) (dev->nic_info.dpp_unmapped_addr +
+			dev->nic_info.dpp_unmapped_len)) &&
+		(len <= dev->nic_info.dpp_unmapped_len)) {
+		/* dpp area mapping */
+		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+		status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+					    len, vma->vm_page_prot);
+	} else {
+		/* queue memory mapping */
+		status = remap_pfn_range(vma, vma->vm_start,
+					 vma->vm_pgoff, len, vma->vm_page_prot);
+	}
+	return status;
+}
+
+static int ocrdma_copy_pd_uresp(struct ocrdma_pd *pd,
+				struct ib_ucontext *ib_ctx,
+				struct ib_udata *udata)
+{
+	int status;
+	u64 db_page_addr;
+	u64 dpp_page_addr;
+	u32 db_page_size;
+	struct ocrdma_alloc_pd_uresp rsp;
+	struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ib_ctx);
+
+	rsp.id = pd->id;
+	rsp.dpp_enabled = pd->dpp_enabled;
+	db_page_addr = pd->dev->nic_info.unmapped_db +
+			(pd->id * pd->dev->nic_info.db_page_size);
+	db_page_size = pd->dev->nic_info.db_page_size;
+
+	status = ocrdma_add_mmap(uctx, db_page_addr, db_page_size);
+	if (status)
+		return status;
+
+	if (pd->dpp_enabled) {
+		dpp_page_addr = pd->dev->nic_info.dpp_unmapped_addr +
+				(pd->id * OCRDMA_DPP_PAGE_SIZE);
+		status = ocrdma_add_mmap(uctx, dpp_page_addr,
+				 OCRDMA_DPP_PAGE_SIZE);
+		if (status)
+			goto dpp_map_err;
+		rsp.dpp_page_addr_hi = upper_32_bits(dpp_page_addr);
+		rsp.dpp_page_addr_lo = dpp_page_addr;
+	}
+
+	status = ib_copy_to_udata(udata, &rsp, sizeof(rsp));
+	if (status)
+		goto ucopy_err;
+
+	pd->uctx = uctx;
+	return 0;
+
+ucopy_err:
+	ocrdma_del_mmap(pd->uctx, dpp_page_addr, OCRDMA_DPP_PAGE_SIZE);
+dpp_map_err:
+	ocrdma_del_mmap(pd->uctx, db_page_addr, db_page_size);
+	return status;
+}
+
+struct ib_pd *ocrdma_alloc_pd(struct ib_device *ibdev,
+			      struct ib_ucontext *context,
+			      struct ib_udata *udata)
+{
+	struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
+	struct ocrdma_pd *pd;
+	int status;
+
+	pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+	if (!pd)
+		return ERR_PTR(-ENOMEM);
+	pd->dev = dev;
+	if (udata && context) {
+		pd->dpp_enabled = (dev->nic_info.dev_family ==
+					OCRDMA_GEN2_FAMILY) ? true : false;
+		pd->num_dpp_qp =
+			pd->dpp_enabled ? OCRDMA_PD_MAX_DPP_ENABLED_QP : 0;
+	}
+	status = ocrdma_mbx_alloc_pd(dev, pd);
+	if (status) {
+		kfree(pd);
+		return ERR_PTR(status);
+	}
+	atomic_set(&pd->use_cnt, 0);
+
+	if (udata && context) {
+		status = ocrdma_copy_pd_uresp(pd, context, udata);
+		if (status)
+			goto err;
+	}
+	return &pd->ibpd;
+
+err:
+	ocrdma_dealloc_pd(&pd->ibpd);
+	return ERR_PTR(status);
+}
+
+int ocrdma_dealloc_pd(struct ib_pd *ibpd)
+{
+	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+	struct ocrdma_dev *dev = pd->dev;
+	int status;
+	u64 usr_db;
+
+	if (atomic_read(&pd->use_cnt)) {
+		ocrdma_err("%s(%d) pd=0x%x is in use.\n",
+			   __func__, dev->id, pd->id);
+		status = -EFAULT;
+		goto dealloc_err;
+	}
+	status = ocrdma_mbx_dealloc_pd(dev, pd);
+	if (pd->uctx) {
+		u64 dpp_db = dev->nic_info.dpp_unmapped_addr +
+		    (pd->id * OCRDMA_DPP_PAGE_SIZE);
+		if (pd->dpp_enabled)
+			ocrdma_del_mmap(pd->uctx, dpp_db, OCRDMA_DPP_PAGE_SIZE);
+		usr_db = dev->nic_info.unmapped_db +
+		    (pd->id * dev->nic_info.db_page_size);
+		ocrdma_del_mmap(pd->uctx, usr_db, dev->nic_info.db_page_size);
+	}
+	kfree(pd);
+dealloc_err:
+	return status;
+}
+
+static struct ocrdma_mr *ocrdma_alloc_lkey(struct ib_pd *ibpd,
+					   int acc, u32 num_pbls,
+					   u32 addr_check)
+{
+	int status;
+	struct ocrdma_mr *mr;
+	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+	struct ocrdma_dev *dev = pd->dev;
+
+	if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE)) {
+		ocrdma_err("%s(%d) leaving err, invalid access rights\n",
+			   __func__, dev->id);
+		return ERR_PTR(-EINVAL);
+	}
+
+	mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+	if (!mr)
+		return ERR_PTR(-ENOMEM);
+	mr->hwmr.dev = dev;
+	mr->hwmr.fr_mr = 0;
+	mr->hwmr.local_rd = 1;
+	mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
+	mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
+	mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
+	mr->hwmr.mw_bind = (acc & IB_ACCESS_MW_BIND) ? 1 : 0;
+	mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
+	mr->hwmr.num_pbls = num_pbls;
+
+	status = ocrdma_mbx_alloc_lkey(dev, &mr->hwmr, pd->id, addr_check);
+	if (status) {
+		kfree(mr);
+		return ERR_PTR(-ENOMEM);
+	}
+	mr->pd = pd;
+	atomic_inc(&pd->use_cnt);
+	mr->ibmr.lkey = mr->hwmr.lkey;
+	if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
+		mr->ibmr.rkey = mr->hwmr.lkey;
+	return mr;
+}
+
+struct ib_mr *ocrdma_get_dma_mr(struct ib_pd *ibpd, int acc)
+{
+	struct ocrdma_mr *mr;
+
+	mr = ocrdma_alloc_lkey(ibpd, acc, 0, OCRDMA_ADDR_CHECK_DISABLE);
+	if (!mr)
+		return ERR_PTR(-ENOMEM);
+
+	return &mr->ibmr;
+}
+
+static void ocrdma_free_mr_pbl_tbl(struct ocrdma_dev *dev,
+				   struct ocrdma_hw_mr *mr)
+{
+	struct pci_dev *pdev = dev->nic_info.pdev;
+	int i = 0;
+
+	if (mr->pbl_table) {
+		for (i = 0; i < mr->num_pbls; i++) {
+			if (!mr->pbl_table[i].va)
+				continue;
+			dma_free_coherent(&pdev->dev, mr->pbl_size,
+					  mr->pbl_table[i].va,
+					  mr->pbl_table[i].pa);
+		}
+		kfree(mr->pbl_table);
+		mr->pbl_table = NULL;
+	}
+}
+
+static int ocrdma_get_pbl_info(struct ocrdma_mr *mr, u32 num_pbes)
+{
+	u32 num_pbls = 0;
+	u32 idx = 0;
+	int status = 0;
+	u32 pbl_size;
+
+	do {
+		pbl_size = OCRDMA_MIN_HPAGE_SIZE * (1 << idx);
+		if (pbl_size > MAX_OCRDMA_PBL_SIZE) {
+			status = -EFAULT;
+			break;
+		}
+		num_pbls = roundup(num_pbes, (pbl_size / sizeof(u64)));
+		num_pbls = num_pbls / (pbl_size / sizeof(u64));
+		idx++;
+	} while (num_pbls >= mr->hwmr.dev->attr.max_num_mr_pbl);
+
+	mr->hwmr.num_pbes = num_pbes;
+	mr->hwmr.num_pbls = num_pbls;
+	mr->hwmr.pbl_size = pbl_size;
+	return status;
+}
+
+static int ocrdma_build_pbl_tbl(struct ocrdma_dev *dev, struct ocrdma_hw_mr *mr)
+{
+	int status = 0;
+	int i;
+	u32 dma_len = mr->pbl_size;
+	struct pci_dev *pdev = dev->nic_info.pdev;
+	void *va;
+	dma_addr_t pa;
+
+	mr->pbl_table = kzalloc(sizeof(struct ocrdma_pbl) *
+				mr->num_pbls, GFP_KERNEL);
+
+	if (!mr->pbl_table)
+		return -ENOMEM;
+
+	for (i = 0; i < mr->num_pbls; i++) {
+		va = dma_alloc_coherent(&pdev->dev, dma_len, &pa, GFP_KERNEL);
+		if (!va) {
+			ocrdma_free_mr_pbl_tbl(dev, mr);
+			status = -ENOMEM;
+			break;
+		}
+		memset(va, 0, dma_len);
+		mr->pbl_table[i].va = va;
+		mr->pbl_table[i].pa = pa;
+	}
+	return status;
+}
+
+static void build_user_pbes(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
+			    u32 num_pbes)
+{
+	struct ocrdma_pbe *pbe;
+	struct ib_umem_chunk *chunk;
+	struct ocrdma_pbl *pbl_tbl = mr->hwmr.pbl_table;
+	struct ib_umem *umem = mr->umem;
+	int i, shift, pg_cnt, pages, pbe_cnt, total_num_pbes = 0;
+
+	if (!mr->hwmr.num_pbes)
+		return;
+
+	pbe = (struct ocrdma_pbe *)pbl_tbl->va;
+	pbe_cnt = 0;
+
+	shift = ilog2(umem->page_size);
+
+	list_for_each_entry(chunk, &umem->chunk_list, list) {
+		/* get all the dma regions from the chunk. */
+		for (i = 0; i < chunk->nmap; i++) {
+			pages = sg_dma_len(&chunk->page_list[i]) >> shift;
+			for (pg_cnt = 0; pg_cnt < pages; pg_cnt++) {
+				/* store the page address in pbe */
+				pbe->pa_lo =
+				    cpu_to_le32(sg_dma_address
+						(&chunk->page_list[i]) +
+						(umem->page_size * pg_cnt));
+				pbe->pa_hi =
+				    cpu_to_le32(upper_32_bits
+						((sg_dma_address
+						  (&chunk->page_list[i]) +
+						  umem->page_size * pg_cnt)));
+				pbe_cnt += 1;
+				total_num_pbes += 1;
+				pbe++;
+
+				/* if done building pbes, issue the mbx cmd. */
+				if (total_num_pbes == num_pbes)
+					return;
+
+				/* if the given pbl is full storing the pbes,
+				 * move to next pbl.
+				 */
+				if (pbe_cnt ==
+					(mr->hwmr.pbl_size / sizeof(u64))) {
+					pbl_tbl++;
+					pbe = (struct ocrdma_pbe *)pbl_tbl->va;
+					pbe_cnt = 0;
+				}
+			}
+		}
+	}
+}
+
+struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
+				 u64 usr_addr, int acc, struct ib_udata *udata)
+{
+	int status = -ENOMEM;
+	struct ocrdma_dev *dev;
+	struct ocrdma_mr *mr;
+	struct ocrdma_pd *pd;
+	struct pci_dev *pdev;
+	u32 num_pbes;
+
+	pd = get_ocrdma_pd(ibpd);
+	dev = pd->dev;
+	pdev = dev->nic_info.pdev;
+
+	if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE))
+		return ERR_PTR(-EINVAL);
+
+	mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+	if (!mr)
+		return ERR_PTR(status);
+	mr->hwmr.dev = dev;
+	mr->umem = ib_umem_get(ibpd->uobject->context, start, len, acc, 0);
+	if (IS_ERR(mr->umem)) {
+		status = -EFAULT;
+		goto umem_err;
+	}
+	num_pbes = ib_umem_page_count(mr->umem);
+	status = ocrdma_get_pbl_info(mr, num_pbes);
+	if (status)
+		goto umem_err;
+
+	mr->hwmr.pbe_size = mr->umem->page_size;
+	mr->hwmr.fbo = mr->umem->offset;
+	mr->hwmr.va = usr_addr;
+	mr->hwmr.len = len;
+	mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
+	mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
+	mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
+	mr->hwmr.local_rd = 1;
+	mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
+	status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
+	if (status)
+		goto umem_err;
+	build_user_pbes(dev, mr, num_pbes);
+	status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, acc);
+	if (status)
+		goto mbx_err;
+	mr->pd = pd;
+	atomic_inc(&pd->use_cnt);
+	mr->ibmr.lkey = mr->hwmr.lkey;
+	if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
+		mr->ibmr.rkey = mr->hwmr.lkey;
+
+	return &mr->ibmr;
+
+mbx_err:
+	ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
+umem_err:
+	kfree(mr);
+	return ERR_PTR(status);
+}
+
+int ocrdma_dereg_mr(struct ib_mr *ib_mr)
+{
+	struct ocrdma_mr *mr = get_ocrdma_mr(ib_mr);
+	struct ocrdma_dev *dev = mr->hwmr.dev;
+	int status;
+
+	status = ocrdma_mbx_dealloc_lkey(dev, mr->hwmr.fr_mr, mr->hwmr.lkey);
+
+	if (mr->hwmr.fr_mr == 0)
+		ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
+
+	atomic_dec(&mr->pd->use_cnt);
+	/* it could be user registered memory. */
+	if (mr->umem)
+		ib_umem_release(mr->umem);
+	kfree(mr);
+	return status;
+}
+
+static int ocrdma_copy_cq_uresp(struct ocrdma_cq *cq, struct ib_udata *udata,
+				struct ib_ucontext *ib_ctx)
+{
+	int status;
+	struct ocrdma_ucontext *uctx;
+	struct ocrdma_create_cq_uresp uresp;
+
+	uresp.cq_id = cq->id;
+	uresp.page_size = cq->len;
+	uresp.num_pages = 1;
+	uresp.max_hw_cqe = cq->max_hw_cqe;
+	uresp.page_addr[0] = cq->pa;
+	uresp.db_page_addr = cq->dev->nic_info.unmapped_db;
+	uresp.db_page_size = cq->dev->nic_info.db_page_size;
+	uresp.phase_change = cq->phase_change ? 1 : 0;
+	status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
+	if (status) {
+		ocrdma_err("%s(%d) copy error cqid=0x%x.\n",
+			   __func__, cq->dev->id, cq->id);
+		goto err;
+	}
+	uctx = get_ocrdma_ucontext(ib_ctx);
+	status = ocrdma_add_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
+	if (status)
+		goto err;
+	status = ocrdma_add_mmap(uctx, uresp.page_addr[0], uresp.page_size);
+	if (status) {
+		ocrdma_del_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
+		goto err;
+	}
+	cq->ucontext = uctx;
+err:
+	return status;
+}
+
+struct ib_cq *ocrdma_create_cq(struct ib_device *ibdev, int entries, int vector,
+			       struct ib_ucontext *ib_ctx,
+			       struct ib_udata *udata)
+{
+	struct ocrdma_cq *cq;
+	struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
+	int status;
+	struct ocrdma_create_cq_ureq ureq;
+
+	if (udata) {
+		if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
+			return ERR_PTR(-EFAULT);
+	} else
+		ureq.dpp_cq = 0;
+	cq = kzalloc(sizeof(*cq), GFP_KERNEL);
+	if (!cq)
+		return ERR_PTR(-ENOMEM);
+
+	spin_lock_init(&cq->cq_lock);
+	spin_lock_init(&cq->comp_handler_lock);
+	atomic_set(&cq->use_cnt, 0);
+	INIT_LIST_HEAD(&cq->sq_head);
+	INIT_LIST_HEAD(&cq->rq_head);
+	cq->dev = dev;
+
+	status = ocrdma_mbx_create_cq(dev, cq, entries, ureq.dpp_cq);
+	if (status) {
+		kfree(cq);
+		return ERR_PTR(status);
+	}
+	if (ib_ctx) {
+		status = ocrdma_copy_cq_uresp(cq, udata, ib_ctx);
+		if (status)
+			goto ctx_err;
+	}
+	cq->phase = OCRDMA_CQE_VALID;
+	cq->arm_needed = true;
+	dev->cq_tbl[cq->id] = cq;
+
+	return &cq->ibcq;
+
+ctx_err:
+	ocrdma_mbx_destroy_cq(dev, cq);
+	kfree(cq);
+	return ERR_PTR(status);
+}
+
+int ocrdma_resize_cq(struct ib_cq *ibcq, int new_cnt,
+		     struct ib_udata *udata)
+{
+	int status = 0;
+	struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
+
+	if (new_cnt < 1 || new_cnt > cq->max_hw_cqe) {
+		status = -EINVAL;
+		return status;
+	}
+	ibcq->cqe = new_cnt;
+	return status;
+}
+
+int ocrdma_destroy_cq(struct ib_cq *ibcq)
+{
+	int status;
+	struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
+	struct ocrdma_dev *dev = cq->dev;
+
+	if (atomic_read(&cq->use_cnt))
+		return -EINVAL;
+
+	status = ocrdma_mbx_destroy_cq(dev, cq);
+
+	if (cq->ucontext) {
+		ocrdma_del_mmap(cq->ucontext, (u64) cq->pa, cq->len);
+		ocrdma_del_mmap(cq->ucontext, dev->nic_info.unmapped_db,
+				dev->nic_info.db_page_size);
+	}
+	dev->cq_tbl[cq->id] = NULL;
+
+	kfree(cq);
+	return status;
+}
+
+static int ocrdma_add_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
+{
+	int status = -EINVAL;
+
+	if (qp->id < OCRDMA_MAX_QP && dev->qp_tbl[qp->id] == NULL) {
+		dev->qp_tbl[qp->id] = qp;
+		status = 0;
+	}
+	return status;
+}
+
+static void ocrdma_del_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
+{
+	dev->qp_tbl[qp->id] = NULL;
+}
+
+static int ocrdma_check_qp_params(struct ib_pd *ibpd, struct ocrdma_dev *dev,
+				  struct ib_qp_init_attr *attrs)
+{
+	if (attrs->qp_type != IB_QPT_GSI &&
+	    attrs->qp_type != IB_QPT_RC &&
+	    attrs->qp_type != IB_QPT_UD) {
+		ocrdma_err("%s(%d) unsupported qp type=0x%x requested\n",
+			   __func__, dev->id, attrs->qp_type);
+		return -EINVAL;
+	}
+	if (attrs->cap.max_send_wr > dev->attr.max_wqe) {
+		ocrdma_err("%s(%d) unsupported send_wr=0x%x requested\n",
+			   __func__, dev->id, attrs->cap.max_send_wr);
+		ocrdma_err("%s(%d) supported send_wr=0x%x\n",
+			   __func__, dev->id, dev->attr.max_wqe);
+		return -EINVAL;
+	}
+	if (!attrs->srq && (attrs->cap.max_recv_wr > dev->attr.max_rqe)) {
+		ocrdma_err("%s(%d) unsupported recv_wr=0x%x requested\n",
+			   __func__, dev->id, attrs->cap.max_recv_wr);
+		ocrdma_err("%s(%d) supported recv_wr=0x%x\n",
+			   __func__, dev->id, dev->attr.max_rqe);
+		return -EINVAL;
+	}
+	if (attrs->cap.max_inline_data > dev->attr.max_inline_data) {
+		ocrdma_err("%s(%d) unsupported inline data size=0x%x"
+			   " requested\n", __func__, dev->id,
+			   attrs->cap.max_inline_data);
+		ocrdma_err("%s(%d) supported inline data size=0x%x\n",
+			   __func__, dev->id, dev->attr.max_inline_data);
+		return -EINVAL;
+	}
+	if (attrs->cap.max_send_sge > dev->attr.max_send_sge) {
+		ocrdma_err("%s(%d) unsupported send_sge=0x%x requested\n",
+			   __func__, dev->id, attrs->cap.max_send_sge);
+		ocrdma_err("%s(%d) supported send_sge=0x%x\n",
+			   __func__, dev->id, dev->attr.max_send_sge);
+		return -EINVAL;
+	}
+	if (attrs->cap.max_recv_sge > dev->attr.max_recv_sge) {
+		ocrdma_err("%s(%d) unsupported recv_sge=0x%x requested\n",
+			   __func__, dev->id, attrs->cap.max_recv_sge);
+		ocrdma_err("%s(%d) supported recv_sge=0x%x\n",
+			   __func__, dev->id, dev->attr.max_recv_sge);
+		return -EINVAL;
+	}
+	/* unprivileged user space cannot create special QP */
+	if (ibpd->uobject && attrs->qp_type == IB_QPT_GSI) {
+		ocrdma_err
+		    ("%s(%d) Userspace can't create special QPs of type=0x%x\n",
+		     __func__, dev->id, attrs->qp_type);
+		return -EINVAL;
+	}
+	/* allow creating only one GSI type of QP */
+	if (attrs->qp_type == IB_QPT_GSI && dev->gsi_qp_created) {
+		ocrdma_err("%s(%d) GSI special QPs already created.\n",
+			   __func__, dev->id);
+		return -EINVAL;
+	}
+	/* verify consumer QPs are not trying to use GSI QP's CQ */
+	if ((attrs->qp_type != IB_QPT_GSI) && (dev->gsi_qp_created)) {
+		if ((dev->gsi_sqcq == get_ocrdma_cq(attrs->send_cq)) ||
+		    (dev->gsi_sqcq == get_ocrdma_cq(attrs->send_cq))) {
+			ocrdma_err("%s(%d) Consumer QP cannot use GSI CQs.\n",
+				   __func__, dev->id);
+			return -EINVAL;
+		}
+	}
+	return 0;
+}
+
+static int ocrdma_copy_qp_uresp(struct ocrdma_qp *qp,
+				struct ib_udata *udata, int dpp_offset,
+				int dpp_credit_lmt, int srq)
+{
+	int status = 0;
+	u64 usr_db;
+	struct ocrdma_create_qp_uresp uresp;
+	struct ocrdma_dev *dev = qp->dev;
+	struct ocrdma_pd *pd = qp->pd;
+
+	memset(&uresp, 0, sizeof(uresp));
+	usr_db = dev->nic_info.unmapped_db +
+			(pd->id * dev->nic_info.db_page_size);
+	uresp.qp_id = qp->id;
+	uresp.sq_dbid = qp->sq.dbid;
+	uresp.num_sq_pages = 1;
+	uresp.sq_page_size = qp->sq.len;
+	uresp.sq_page_addr[0] = qp->sq.pa;
+	uresp.num_wqe_allocated = qp->sq.max_cnt;
+	if (!srq) {
+		uresp.rq_dbid = qp->rq.dbid;
+		uresp.num_rq_pages = 1;
+		uresp.rq_page_size = qp->rq.len;
+		uresp.rq_page_addr[0] = qp->rq.pa;
+		uresp.num_rqe_allocated = qp->rq.max_cnt;
+	}
+	uresp.db_page_addr = usr_db;
+	uresp.db_page_size = dev->nic_info.db_page_size;
+	if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+		uresp.db_sq_offset = OCRDMA_DB_GEN2_SQ_OFFSET;
+		uresp.db_rq_offset = ((qp->id & 0xFFFF) < 128) ?
+			OCRDMA_DB_GEN2_RQ1_OFFSET : OCRDMA_DB_GEN2_RQ2_OFFSET;
+		uresp.db_shift = (qp->id < 128) ? 24 : 16;
+	} else {
+		uresp.db_sq_offset = OCRDMA_DB_SQ_OFFSET;
+		uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET;
+		uresp.db_shift = 16;
+	}
+	uresp.free_wqe_delta = qp->sq.free_delta;
+	uresp.free_rqe_delta = qp->rq.free_delta;
+
+	if (qp->dpp_enabled) {
+		uresp.dpp_credit = dpp_credit_lmt;
+		uresp.dpp_offset = dpp_offset;
+	}
+	status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
+	if (status) {
+		ocrdma_err("%s(%d) user copy error.\n", __func__, dev->id);
+		goto err;
+	}
+	status = ocrdma_add_mmap(pd->uctx, uresp.sq_page_addr[0],
+				 uresp.sq_page_size);
+	if (status)
+		goto err;
+
+	if (!srq) {
+		status = ocrdma_add_mmap(pd->uctx, uresp.rq_page_addr[0],
+					 uresp.rq_page_size);
+		if (status)
+			goto rq_map_err;
+	}
+	return status;
+rq_map_err:
+	ocrdma_del_mmap(pd->uctx, uresp.sq_page_addr[0], uresp.sq_page_size);
+err:
+	return status;
+}
+
+static void ocrdma_set_qp_db(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
+			     struct ocrdma_pd *pd)
+{
+	if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+		qp->sq_db = dev->nic_info.db +
+			(pd->id * dev->nic_info.db_page_size) +
+			OCRDMA_DB_GEN2_SQ_OFFSET;
+		qp->rq_db = dev->nic_info.db +
+			(pd->id * dev->nic_info.db_page_size) +
+			((qp->id < 128) ?
+			OCRDMA_DB_GEN2_RQ1_OFFSET : OCRDMA_DB_GEN2_RQ2_OFFSET);
+	} else {
+		qp->sq_db = dev->nic_info.db +
+			(pd->id * dev->nic_info.db_page_size) +
+			OCRDMA_DB_SQ_OFFSET;
+		qp->rq_db = dev->nic_info.db +
+			(pd->id * dev->nic_info.db_page_size) +
+			OCRDMA_DB_RQ_OFFSET;
+	}
+}
+
+static int ocrdma_alloc_wr_id_tbl(struct ocrdma_qp *qp)
+{
+	qp->wqe_wr_id_tbl =
+	    kzalloc(sizeof(*(qp->wqe_wr_id_tbl)) * qp->sq.max_cnt,
+		    GFP_KERNEL);
+	if (qp->wqe_wr_id_tbl == NULL)
+		return -ENOMEM;
+	qp->rqe_wr_id_tbl =
+	    kzalloc(sizeof(u64) * qp->rq.max_cnt, GFP_KERNEL);
+	if (qp->rqe_wr_id_tbl == NULL)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void ocrdma_set_qp_init_params(struct ocrdma_qp *qp,
+				      struct ocrdma_pd *pd,
+				      struct ib_qp_init_attr *attrs)
+{
+	qp->pd = pd;
+	spin_lock_init(&qp->q_lock);
+	INIT_LIST_HEAD(&qp->sq_entry);
+	INIT_LIST_HEAD(&qp->rq_entry);
+
+	qp->qp_type = attrs->qp_type;
+	qp->cap_flags = OCRDMA_QP_INB_RD | OCRDMA_QP_INB_WR;
+	qp->max_inline_data = attrs->cap.max_inline_data;
+	qp->sq.max_sges = attrs->cap.max_send_sge;
+	qp->rq.max_sges = attrs->cap.max_recv_sge;
+	qp->state = OCRDMA_QPS_RST;
+}
+
+static void ocrdma_set_qp_use_cnt(struct ocrdma_qp *qp, struct ocrdma_pd *pd)
+{
+	atomic_inc(&pd->use_cnt);
+	atomic_inc(&qp->sq_cq->use_cnt);
+	atomic_inc(&qp->rq_cq->use_cnt);
+	if (qp->srq)
+		atomic_inc(&qp->srq->use_cnt);
+	qp->ibqp.qp_num = qp->id;
+}
+
+static void ocrdma_store_gsi_qp_cq(struct ocrdma_dev *dev,
+				   struct ib_qp_init_attr *attrs)
+{
+	if (attrs->qp_type == IB_QPT_GSI) {
+		dev->gsi_qp_created = 1;
+		dev->gsi_sqcq = get_ocrdma_cq(attrs->send_cq);
+		dev->gsi_rqcq = get_ocrdma_cq(attrs->recv_cq);
+	}
+}
+
+struct ib_qp *ocrdma_create_qp(struct ib_pd *ibpd,
+			       struct ib_qp_init_attr *attrs,
+			       struct ib_udata *udata)
+{
+	int status;
+	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+	struct ocrdma_qp *qp;
+	struct ocrdma_dev *dev = pd->dev;
+	struct ocrdma_create_qp_ureq ureq;
+	u16 dpp_credit_lmt, dpp_offset;
+
+	status = ocrdma_check_qp_params(ibpd, dev, attrs);
+	if (status)
+		goto gen_err;
+
+	memset(&ureq, 0, sizeof(ureq));
+	if (udata) {
+		if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
+			return ERR_PTR(-EFAULT);
+	}
+	qp = kzalloc(sizeof(*qp), GFP_KERNEL);
+	if (!qp) {
+		status = -ENOMEM;
+		goto gen_err;
+	}
+	qp->dev = dev;
+	ocrdma_set_qp_init_params(qp, pd, attrs);
+
+	mutex_lock(&dev->dev_lock);
+	status = ocrdma_mbx_create_qp(qp, attrs, ureq.enable_dpp_cq,
+					ureq.dpp_cq_id,
+					&dpp_offset, &dpp_credit_lmt);
+	if (status)
+		goto mbx_err;
+
+	/* user space QP's wr_id table are managed in library */
+	if (udata == NULL) {
+		qp->cap_flags |= (OCRDMA_QP_MW_BIND | OCRDMA_QP_LKEY0 |
+				  OCRDMA_QP_FAST_REG);
+		status = ocrdma_alloc_wr_id_tbl(qp);
+		if (status)
+			goto map_err;
+	}
+
+	status = ocrdma_add_qpn_map(dev, qp);
+	if (status)
+		goto map_err;
+	ocrdma_set_qp_db(dev, qp, pd);
+	if (udata) {
+		status = ocrdma_copy_qp_uresp(qp, udata, dpp_offset,
+					      dpp_credit_lmt,
+					      (attrs->srq != NULL));
+		if (status)
+			goto cpy_err;
+	}
+	ocrdma_store_gsi_qp_cq(dev, attrs);
+	ocrdma_set_qp_use_cnt(qp, pd);
+	mutex_unlock(&dev->dev_lock);
+	return &qp->ibqp;
+
+cpy_err:
+	ocrdma_del_qpn_map(dev, qp);
+map_err:
+	ocrdma_mbx_destroy_qp(dev, qp);
+mbx_err:
+	mutex_unlock(&dev->dev_lock);
+	kfree(qp->wqe_wr_id_tbl);
+	kfree(qp->rqe_wr_id_tbl);
+	kfree(qp);
+	ocrdma_err("%s(%d) error=%d\n", __func__, dev->id, status);
+gen_err:
+	return ERR_PTR(status);
+}
+
+int _ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+		      int attr_mask)
+{
+	int status = 0;
+	struct ocrdma_qp *qp;
+	struct ocrdma_dev *dev;
+	enum ib_qp_state old_qps;
+
+	qp = get_ocrdma_qp(ibqp);
+	dev = qp->dev;
+	if (attr_mask & IB_QP_STATE)
+		status = ocrdma_qp_state_machine(qp, attr->qp_state, &old_qps);
+	/* if new and previous states are same hw doesn't need to
+	 * know about it.
+	 */
+	if (status < 0)
+		return status;
+	status = ocrdma_mbx_modify_qp(dev, qp, attr, attr_mask, old_qps);
+	return status;
+}
+
+int ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+		     int attr_mask, struct ib_udata *udata)
+{
+	unsigned long flags;
+	int status = -EINVAL;
+	struct ocrdma_qp *qp;
+	struct ocrdma_dev *dev;
+	enum ib_qp_state old_qps, new_qps;
+
+	qp = get_ocrdma_qp(ibqp);
+	dev = qp->dev;
+
+	/* syncronize with multiple context trying to change, retrive qps */
+	mutex_lock(&dev->dev_lock);
+	/* syncronize with wqe, rqe posting and cqe processing contexts */
+	spin_lock_irqsave(&qp->q_lock, flags);
+	old_qps = get_ibqp_state(qp->state);
+	if (attr_mask & IB_QP_STATE)
+		new_qps = attr->qp_state;
+	else
+		new_qps = old_qps;
+	spin_unlock_irqrestore(&qp->q_lock, flags);
+
+	if (!ib_modify_qp_is_ok(old_qps, new_qps, ibqp->qp_type, attr_mask)) {
+		ocrdma_err("%s(%d) invalid attribute mask=0x%x specified for "
+			   "qpn=0x%x of type=0x%x old_qps=0x%x, new_qps=0x%x\n",
+			   __func__, dev->id, attr_mask, qp->id, ibqp->qp_type,
+			   old_qps, new_qps);
+		goto param_err;
+	}
+
+	status = _ocrdma_modify_qp(ibqp, attr, attr_mask);
+	if (status > 0)
+		status = 0;
+param_err:
+	mutex_unlock(&dev->dev_lock);
+	return status;
+}
+
+static enum ib_mtu ocrdma_mtu_int_to_enum(u16 mtu)
+{
+	switch (mtu) {
+	case 256:
+		return IB_MTU_256;
+	case 512:
+		return IB_MTU_512;
+	case 1024:
+		return IB_MTU_1024;
+	case 2048:
+		return IB_MTU_2048;
+	case 4096:
+		return IB_MTU_4096;
+	default:
+		return IB_MTU_1024;
+	}
+}
+
+static int ocrdma_to_ib_qp_acc_flags(int qp_cap_flags)
+{
+	int ib_qp_acc_flags = 0;
+
+	if (qp_cap_flags & OCRDMA_QP_INB_WR)
+		ib_qp_acc_flags |= IB_ACCESS_REMOTE_WRITE;
+	if (qp_cap_flags & OCRDMA_QP_INB_RD)
+		ib_qp_acc_flags |= IB_ACCESS_LOCAL_WRITE;
+	return ib_qp_acc_flags;
+}
+
+int ocrdma_query_qp(struct ib_qp *ibqp,
+		    struct ib_qp_attr *qp_attr,
+		    int attr_mask, struct ib_qp_init_attr *qp_init_attr)
+{
+	int status;
+	u32 qp_state;
+	struct ocrdma_qp_params params;
+	struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
+	struct ocrdma_dev *dev = qp->dev;
+
+	memset(&params, 0, sizeof(params));
+	mutex_lock(&dev->dev_lock);
+	status = ocrdma_mbx_query_qp(dev, qp, &params);
+	mutex_unlock(&dev->dev_lock);
+	if (status)
+		goto mbx_err;
+	qp_attr->qp_state = get_ibqp_state(IB_QPS_INIT);
+	qp_attr->cur_qp_state = get_ibqp_state(IB_QPS_INIT);
+	qp_attr->path_mtu =
+		ocrdma_mtu_int_to_enum(params.path_mtu_pkey_indx &
+				OCRDMA_QP_PARAMS_PATH_MTU_MASK) >>
+				OCRDMA_QP_PARAMS_PATH_MTU_SHIFT;
+	qp_attr->path_mig_state = IB_MIG_MIGRATED;
+	qp_attr->rq_psn = params.hop_lmt_rq_psn & OCRDMA_QP_PARAMS_RQ_PSN_MASK;
+	qp_attr->sq_psn = params.tclass_sq_psn & OCRDMA_QP_PARAMS_SQ_PSN_MASK;
+	qp_attr->dest_qp_num =
+	    params.ack_to_rnr_rtc_dest_qpn & OCRDMA_QP_PARAMS_DEST_QPN_MASK;
+
+	qp_attr->qp_access_flags = ocrdma_to_ib_qp_acc_flags(qp->cap_flags);
+	qp_attr->cap.max_send_wr = qp->sq.max_cnt - 1;
+	qp_attr->cap.max_recv_wr = qp->rq.max_cnt - 1;
+	qp_attr->cap.max_send_sge = qp->sq.max_sges;
+	qp_attr->cap.max_recv_sge = qp->rq.max_sges;
+	qp_attr->cap.max_inline_data = dev->attr.max_inline_data;
+	qp_init_attr->cap = qp_attr->cap;
+	memcpy(&qp_attr->ah_attr.grh.dgid, &params.dgid[0],
+	       sizeof(params.dgid));
+	qp_attr->ah_attr.grh.flow_label = params.rnt_rc_sl_fl &
+	    OCRDMA_QP_PARAMS_FLOW_LABEL_MASK;
+	qp_attr->ah_attr.grh.sgid_index = qp->sgid_idx;
+	qp_attr->ah_attr.grh.hop_limit = (params.hop_lmt_rq_psn &
+					  OCRDMA_QP_PARAMS_HOP_LMT_MASK) >>
+						OCRDMA_QP_PARAMS_HOP_LMT_SHIFT;
+	qp_attr->ah_attr.grh.traffic_class = (params.tclass_sq_psn &
+					      OCRDMA_QP_PARAMS_SQ_PSN_MASK) >>
+						OCRDMA_QP_PARAMS_TCLASS_SHIFT;
+
+	qp_attr->ah_attr.ah_flags = IB_AH_GRH;
+	qp_attr->ah_attr.port_num = 1;
+	qp_attr->ah_attr.sl = (params.rnt_rc_sl_fl &
+			       OCRDMA_QP_PARAMS_SL_MASK) >>
+				OCRDMA_QP_PARAMS_SL_SHIFT;
+	qp_attr->timeout = (params.ack_to_rnr_rtc_dest_qpn &
+			    OCRDMA_QP_PARAMS_ACK_TIMEOUT_MASK) >>
+				OCRDMA_QP_PARAMS_ACK_TIMEOUT_SHIFT;
+	qp_attr->rnr_retry = (params.ack_to_rnr_rtc_dest_qpn &
+			      OCRDMA_QP_PARAMS_RNR_RETRY_CNT_MASK) >>
+				OCRDMA_QP_PARAMS_RNR_RETRY_CNT_SHIFT;
+	qp_attr->retry_cnt =
+	    (params.rnt_rc_sl_fl & OCRDMA_QP_PARAMS_RETRY_CNT_MASK) >>
+		OCRDMA_QP_PARAMS_RETRY_CNT_SHIFT;
+	qp_attr->min_rnr_timer = 0;
+	qp_attr->pkey_index = 0;
+	qp_attr->port_num = 1;
+	qp_attr->ah_attr.src_path_bits = 0;
+	qp_attr->ah_attr.static_rate = 0;
+	qp_attr->alt_pkey_index = 0;
+	qp_attr->alt_port_num = 0;
+	qp_attr->alt_timeout = 0;
+	memset(&qp_attr->alt_ah_attr, 0, sizeof(qp_attr->alt_ah_attr));
+	qp_state = (params.max_sge_recv_flags & OCRDMA_QP_PARAMS_STATE_MASK) >>
+		    OCRDMA_QP_PARAMS_STATE_SHIFT;
+	qp_attr->sq_draining = (qp_state == OCRDMA_QPS_SQ_DRAINING) ? 1 : 0;
+	qp_attr->max_dest_rd_atomic =
+	    params.max_ord_ird >> OCRDMA_QP_PARAMS_MAX_ORD_SHIFT;
+	qp_attr->max_rd_atomic =
+	    params.max_ord_ird & OCRDMA_QP_PARAMS_MAX_IRD_MASK;
+	qp_attr->en_sqd_async_notify = (params.max_sge_recv_flags &
+				OCRDMA_QP_PARAMS_FLAGS_SQD_ASYNC) ? 1 : 0;
+mbx_err:
+	return status;
+}
+
+static void ocrdma_srq_toggle_bit(struct ocrdma_srq *srq, int idx)
+{
+	int i = idx / 32;
+	unsigned int mask = (1 << (idx % 32));
+
+	if (srq->idx_bit_fields[i] & mask)
+		srq->idx_bit_fields[i] &= ~mask;
+	else
+		srq->idx_bit_fields[i] |= mask;
+}
+
+static int ocrdma_hwq_free_cnt(struct ocrdma_qp_hwq_info *q)
+{
+	int free_cnt;
+	if (q->head >= q->tail)
+		free_cnt = (q->max_cnt - q->head) + q->tail;
+	else
+		free_cnt = q->tail - q->head;
+	if (q->free_delta)
+		free_cnt -= q->free_delta;
+	return free_cnt;
+}
+
+static int is_hw_sq_empty(struct ocrdma_qp *qp)
+{
+	return (qp->sq.tail == qp->sq.head &&
+		ocrdma_hwq_free_cnt(&qp->sq) ? 1 : 0);
+}
+
+static int is_hw_rq_empty(struct ocrdma_qp *qp)
+{
+	return (qp->rq.tail == qp->rq.head) ? 1 : 0;
+}
+
+static void *ocrdma_hwq_head(struct ocrdma_qp_hwq_info *q)
+{
+	return q->va + (q->head * q->entry_size);
+}
+
+static void *ocrdma_hwq_head_from_idx(struct ocrdma_qp_hwq_info *q,
+				      u32 idx)
+{
+	return q->va + (idx * q->entry_size);
+}
+
+static void ocrdma_hwq_inc_head(struct ocrdma_qp_hwq_info *q)
+{
+	q->head = (q->head + 1) & q->max_wqe_idx;
+}
+
+static void ocrdma_hwq_inc_tail(struct ocrdma_qp_hwq_info *q)
+{
+	q->tail = (q->tail + 1) & q->max_wqe_idx;
+}
+
+/* discard the cqe for a given QP */
+static void ocrdma_discard_cqes(struct ocrdma_qp *qp, struct ocrdma_cq *cq)
+{
+	unsigned long cq_flags;
+	unsigned long flags;
+	int discard_cnt = 0;
+	u32 cur_getp, stop_getp;
+	struct ocrdma_cqe *cqe;
+	u32 qpn = 0;
+
+	spin_lock_irqsave(&cq->cq_lock, cq_flags);
+
+	/* traverse through the CQEs in the hw CQ,
+	 * find the matching CQE for a given qp,
+	 * mark the matching one discarded by clearing qpn.
+	 * ring the doorbell in the poll_cq() as
+	 * we don't complete out of order cqe.
+	 */
+
+	cur_getp = cq->getp;
+	/* find upto when do we reap the cq. */
+	stop_getp = cur_getp;
+	do {
+		if (is_hw_sq_empty(qp) && (!qp->srq && is_hw_rq_empty(qp)))
+			break;
+
+		cqe = cq->va + cur_getp;
+		/* if (a) done reaping whole hw cq, or
+		 *    (b) qp_xq becomes empty.
+		 * then exit
+		 */
+		qpn = cqe->cmn.qpn & OCRDMA_CQE_QPN_MASK;
+		/* if previously discarded cqe found, skip that too. */
+		/* check for matching qp */
+		if (qpn == 0 || qpn != qp->id)
+			goto skip_cqe;
+
+		/* mark cqe discarded so that it is not picked up later
+		 * in the poll_cq().
+		 */
+		discard_cnt += 1;
+		cqe->cmn.qpn = 0;
+		if (is_cqe_for_sq(cqe))
+			ocrdma_hwq_inc_tail(&qp->sq);
+		else {
+			if (qp->srq) {
+				spin_lock_irqsave(&qp->srq->q_lock, flags);
+				ocrdma_hwq_inc_tail(&qp->srq->rq);
+				ocrdma_srq_toggle_bit(qp->srq, cur_getp);
+				spin_unlock_irqrestore(&qp->srq->q_lock, flags);
+
+			} else
+				ocrdma_hwq_inc_tail(&qp->rq);
+		}
+skip_cqe:
+		cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
+	} while (cur_getp != stop_getp);
+	spin_unlock_irqrestore(&cq->cq_lock, cq_flags);
+}
+
+static void ocrdma_del_flush_qp(struct ocrdma_qp *qp)
+{
+	int found = false;
+	unsigned long flags;
+	struct ocrdma_dev *dev = qp->dev;
+	/* sync with any active CQ poll */
+
+	spin_lock_irqsave(&dev->flush_q_lock, flags);
+	found = ocrdma_is_qp_in_sq_flushlist(qp->sq_cq, qp);
+	if (found)
+		list_del(&qp->sq_entry);
+	if (!qp->srq) {
+		found = ocrdma_is_qp_in_rq_flushlist(qp->rq_cq, qp);
+		if (found)
+			list_del(&qp->rq_entry);
+	}
+	spin_unlock_irqrestore(&dev->flush_q_lock, flags);
+}
+
+int ocrdma_destroy_qp(struct ib_qp *ibqp)
+{
+	int status;
+	struct ocrdma_pd *pd;
+	struct ocrdma_qp *qp;
+	struct ocrdma_dev *dev;
+	struct ib_qp_attr attrs;
+	int attr_mask = IB_QP_STATE;
+	unsigned long wq_flags = 0, rq_flags = 0;
+
+	qp = get_ocrdma_qp(ibqp);
+	dev = qp->dev;
+
+	attrs.qp_state = IB_QPS_ERR;
+	pd = qp->pd;
+
+	/* change the QP state to ERROR */
+	_ocrdma_modify_qp(ibqp, &attrs, attr_mask);
+
+	/* ensure that CQEs for newly created QP (whose id may be same with
+	 * one which just getting destroyed are same), dont get
+	 * discarded until the old CQEs are discarded.
+	 */
+	mutex_lock(&dev->dev_lock);
+	status = ocrdma_mbx_destroy_qp(dev, qp);
+
+	/*
+	 * acquire CQ lock while destroy is in progress, in order to
+	 * protect against proessing in-flight CQEs for this QP.
+	 */
+	spin_lock_irqsave(&qp->sq_cq->cq_lock, wq_flags);
+	if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
+		spin_lock_irqsave(&qp->rq_cq->cq_lock, rq_flags);
+
+	ocrdma_del_qpn_map(dev, qp);
+
+	if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
+		spin_unlock_irqrestore(&qp->rq_cq->cq_lock, rq_flags);
+	spin_unlock_irqrestore(&qp->sq_cq->cq_lock, wq_flags);
+
+	if (!pd->uctx) {
+		ocrdma_discard_cqes(qp, qp->sq_cq);
+		ocrdma_discard_cqes(qp, qp->rq_cq);
+	}
+	mutex_unlock(&dev->dev_lock);
+
+	if (pd->uctx) {
+		ocrdma_del_mmap(pd->uctx, (u64) qp->sq.pa, qp->sq.len);
+		if (!qp->srq)
+			ocrdma_del_mmap(pd->uctx, (u64) qp->rq.pa, qp->rq.len);
+	}
+
+	ocrdma_del_flush_qp(qp);
+
+	atomic_dec(&qp->pd->use_cnt);
+	atomic_dec(&qp->sq_cq->use_cnt);
+	atomic_dec(&qp->rq_cq->use_cnt);
+	if (qp->srq)
+		atomic_dec(&qp->srq->use_cnt);
+	kfree(qp->wqe_wr_id_tbl);
+	kfree(qp->rqe_wr_id_tbl);
+	kfree(qp);
+	return status;
+}
+
+static int ocrdma_copy_srq_uresp(struct ocrdma_srq *srq, struct ib_udata *udata)
+{
+	int status;
+	struct ocrdma_create_srq_uresp uresp;
+
+	uresp.rq_dbid = srq->rq.dbid;
+	uresp.num_rq_pages = 1;
+	uresp.rq_page_addr[0] = srq->rq.pa;
+	uresp.rq_page_size = srq->rq.len;
+	uresp.db_page_addr = srq->dev->nic_info.unmapped_db +
+	    (srq->pd->id * srq->dev->nic_info.db_page_size);
+	uresp.db_page_size = srq->dev->nic_info.db_page_size;
+	uresp.num_rqe_allocated = srq->rq.max_cnt;
+	uresp.free_rqe_delta = 1;
+	if (srq->dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+		uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ1_OFFSET;
+		uresp.db_shift = 24;
+	} else {
+		uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET;
+		uresp.db_shift = 16;
+	}
+
+	status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
+	if (status)
+		return status;
+	status = ocrdma_add_mmap(srq->pd->uctx, uresp.rq_page_addr[0],
+				 uresp.rq_page_size);
+	if (status)
+		return status;
+	return status;
+}
+
+struct ib_srq *ocrdma_create_srq(struct ib_pd *ibpd,
+				 struct ib_srq_init_attr *init_attr,
+				 struct ib_udata *udata)
+{
+	int status = -ENOMEM;
+	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+	struct ocrdma_dev *dev = pd->dev;
+	struct ocrdma_srq *srq;
+
+	if (init_attr->attr.max_sge > dev->attr.max_recv_sge)
+		return ERR_PTR(-EINVAL);
+	if (init_attr->attr.max_wr > dev->attr.max_rqe)
+		return ERR_PTR(-EINVAL);
+
+	srq = kzalloc(sizeof(*srq), GFP_KERNEL);
+	if (!srq)
+		return ERR_PTR(status);
+
+	spin_lock_init(&srq->q_lock);
+	srq->dev = dev;
+	srq->pd = pd;
+	srq->db = dev->nic_info.db + (pd->id * dev->nic_info.db_page_size);
+	status = ocrdma_mbx_create_srq(srq, init_attr, pd);
+	if (status)
+		goto err;
+
+	if (udata == NULL) {
+		srq->rqe_wr_id_tbl = kzalloc(sizeof(u64) * srq->rq.max_cnt,
+			    GFP_KERNEL);
+		if (srq->rqe_wr_id_tbl == NULL)
+			goto arm_err;
+
+		srq->bit_fields_len = (srq->rq.max_cnt / 32) +
+		    (srq->rq.max_cnt % 32 ? 1 : 0);
+		srq->idx_bit_fields =
+		    kmalloc(srq->bit_fields_len * sizeof(u32), GFP_KERNEL);
+		if (srq->idx_bit_fields == NULL)
+			goto arm_err;
+		memset(srq->idx_bit_fields, 0xff,
+		       srq->bit_fields_len * sizeof(u32));
+	}
+
+	if (init_attr->attr.srq_limit) {
+		status = ocrdma_mbx_modify_srq(srq, &init_attr->attr);
+		if (status)
+			goto arm_err;
+	}
+
+	atomic_set(&srq->use_cnt, 0);
+	if (udata) {
+		status = ocrdma_copy_srq_uresp(srq, udata);
+		if (status)
+			goto arm_err;
+	}
+
+	atomic_inc(&pd->use_cnt);
+	return &srq->ibsrq;
+
+arm_err:
+	ocrdma_mbx_destroy_srq(dev, srq);
+err:
+	kfree(srq->rqe_wr_id_tbl);
+	kfree(srq->idx_bit_fields);
+	kfree(srq);
+	return ERR_PTR(status);
+}
+
+int ocrdma_modify_srq(struct ib_srq *ibsrq,
+		      struct ib_srq_attr *srq_attr,
+		      enum ib_srq_attr_mask srq_attr_mask,
+		      struct ib_udata *udata)
+{
+	int status = 0;
+	struct ocrdma_srq *srq;
+	struct ocrdma_dev *dev;
+
+	srq = get_ocrdma_srq(ibsrq);
+	dev = srq->dev;
+	if (srq_attr_mask & IB_SRQ_MAX_WR)
+		status = -EINVAL;
+	else
+		status = ocrdma_mbx_modify_srq(srq, srq_attr);
+	return status;
+}
+
+int ocrdma_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
+{
+	int status;
+	struct ocrdma_srq *srq;
+	struct ocrdma_dev *dev;
+
+	srq = get_ocrdma_srq(ibsrq);
+	dev = srq->dev;
+	status = ocrdma_mbx_query_srq(srq, srq_attr);
+	return status;
+}
+
+int ocrdma_destroy_srq(struct ib_srq *ibsrq)
+{
+	int status;
+	struct ocrdma_srq *srq;
+	struct ocrdma_dev *dev;
+
+	srq = get_ocrdma_srq(ibsrq);
+	dev = srq->dev;
+	if (atomic_read(&srq->use_cnt)) {
+		ocrdma_err("%s(%d) err, srq=0x%x in use\n",
+			   __func__, dev->id, srq->id);
+		return -EAGAIN;
+	}
+
+	status = ocrdma_mbx_destroy_srq(dev, srq);
+
+	if (srq->pd->uctx)
+		ocrdma_del_mmap(srq->pd->uctx, (u64) srq->rq.pa, srq->rq.len);
+
+	atomic_dec(&srq->pd->use_cnt);
+	kfree(srq->idx_bit_fields);
+	kfree(srq->rqe_wr_id_tbl);
+	kfree(srq);
+	return status;
+}
+
+/* unprivileged verbs and their support functions. */
+static void ocrdma_build_ud_hdr(struct ocrdma_qp *qp,
+				struct ocrdma_hdr_wqe *hdr,
+				struct ib_send_wr *wr)
+{
+	struct ocrdma_ewqe_ud_hdr *ud_hdr =
+		(struct ocrdma_ewqe_ud_hdr *)(hdr + 1);
+	struct ocrdma_ah *ah = get_ocrdma_ah(wr->wr.ud.ah);
+
+	ud_hdr->rsvd_dest_qpn = wr->wr.ud.remote_qpn;
+	if (qp->qp_type == IB_QPT_GSI)
+		ud_hdr->qkey = qp->qkey;
+	else
+		ud_hdr->qkey = wr->wr.ud.remote_qkey;
+	ud_hdr->rsvd_ahid = ah->id;
+}
+
+static void ocrdma_build_sges(struct ocrdma_hdr_wqe *hdr,
+			      struct ocrdma_sge *sge, int num_sge,
+			      struct ib_sge *sg_list)
+{
+	int i;
+
+	for (i = 0; i < num_sge; i++) {
+		sge[i].lrkey = sg_list[i].lkey;
+		sge[i].addr_lo = sg_list[i].addr;
+		sge[i].addr_hi = upper_32_bits(sg_list[i].addr);
+		sge[i].len = sg_list[i].length;
+		hdr->total_len += sg_list[i].length;
+	}
+	if (num_sge == 0)
+		memset(sge, 0, sizeof(*sge));
+}
+
+static int ocrdma_build_inline_sges(struct ocrdma_qp *qp,
+				    struct ocrdma_hdr_wqe *hdr,
+				    struct ocrdma_sge *sge,
+				    struct ib_send_wr *wr, u32 wqe_size)
+{
+	if (wr->send_flags & IB_SEND_INLINE) {
+		if (wr->sg_list[0].length > qp->max_inline_data) {
+			ocrdma_err("%s() supported_len=0x%x,"
+				" unspported len req=0x%x\n", __func__,
+				qp->max_inline_data, wr->sg_list[0].length);
+			return -EINVAL;
+		}
+		memcpy(sge,
+		       (void *)(unsigned long)wr->sg_list[0].addr,
+		       wr->sg_list[0].length);
+		hdr->total_len = wr->sg_list[0].length;
+		wqe_size += roundup(hdr->total_len, OCRDMA_WQE_ALIGN_BYTES);
+		hdr->cw |= (OCRDMA_TYPE_INLINE << OCRDMA_WQE_TYPE_SHIFT);
+	} else {
+		ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
+		if (wr->num_sge)
+			wqe_size += (wr->num_sge * sizeof(struct ocrdma_sge));
+		else
+			wqe_size += sizeof(struct ocrdma_sge);
+		hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
+	}
+	hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
+	return 0;
+}
+
+static int ocrdma_build_send(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
+			     struct ib_send_wr *wr)
+{
+	int status;
+	struct ocrdma_sge *sge;
+	u32 wqe_size = sizeof(*hdr);
+
+	if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
+		ocrdma_build_ud_hdr(qp, hdr, wr);
+		sge = (struct ocrdma_sge *)(hdr + 2);
+		wqe_size += sizeof(struct ocrdma_ewqe_ud_hdr);
+	} else
+		sge = (struct ocrdma_sge *)(hdr + 1);
+
+	status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
+	return status;
+}
+
+static int ocrdma_build_write(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
+			      struct ib_send_wr *wr)
+{
+	int status;
+	struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
+	struct ocrdma_sge *sge = ext_rw + 1;
+	u32 wqe_size = sizeof(*hdr) + sizeof(*ext_rw);
+
+	status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
+	if (status)
+		return status;
+	ext_rw->addr_lo = wr->wr.rdma.remote_addr;
+	ext_rw->addr_hi = upper_32_bits(wr->wr.rdma.remote_addr);
+	ext_rw->lrkey = wr->wr.rdma.rkey;
+	ext_rw->len = hdr->total_len;
+	return 0;
+}
+
+static void ocrdma_build_read(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
+			      struct ib_send_wr *wr)
+{
+	struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
+	struct ocrdma_sge *sge = ext_rw + 1;
+	u32 wqe_size = ((wr->num_sge + 1) * sizeof(struct ocrdma_sge)) +
+	    sizeof(struct ocrdma_hdr_wqe);
+
+	ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
+	hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
+	hdr->cw |= (OCRDMA_READ << OCRDMA_WQE_OPCODE_SHIFT);
+	hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
+
+	ext_rw->addr_lo = wr->wr.rdma.remote_addr;
+	ext_rw->addr_hi = upper_32_bits(wr->wr.rdma.remote_addr);
+	ext_rw->lrkey = wr->wr.rdma.rkey;
+	ext_rw->len = hdr->total_len;
+}
+
+static void ocrdma_ring_sq_db(struct ocrdma_qp *qp)
+{
+	u32 val = qp->sq.dbid | (1 << 16);
+
+	iowrite32(val, qp->sq_db);
+}
+
+int ocrdma_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+		     struct ib_send_wr **bad_wr)
+{
+	int status = 0;
+	struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
+	struct ocrdma_hdr_wqe *hdr;
+	unsigned long flags;
+
+	spin_lock_irqsave(&qp->q_lock, flags);
+	if (qp->state != OCRDMA_QPS_RTS && qp->state != OCRDMA_QPS_SQD) {
+		spin_unlock_irqrestore(&qp->q_lock, flags);
+		return -EINVAL;
+	}
+
+	while (wr) {
+		if (ocrdma_hwq_free_cnt(&qp->sq) == 0 ||
+		    wr->num_sge > qp->sq.max_sges) {
+			status = -ENOMEM;
+			break;
+		}
+		hdr = ocrdma_hwq_head(&qp->sq);
+		hdr->cw = 0;
+		if (wr->send_flags & IB_SEND_SIGNALED)
+			hdr->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
+		if (wr->send_flags & IB_SEND_FENCE)
+			hdr->cw |=
+			    (OCRDMA_FLAG_FENCE_L << OCRDMA_WQE_FLAGS_SHIFT);
+		if (wr->send_flags & IB_SEND_SOLICITED)
+			hdr->cw |=
+			    (OCRDMA_FLAG_SOLICIT << OCRDMA_WQE_FLAGS_SHIFT);
+		hdr->total_len = 0;
+		switch (wr->opcode) {
+		case IB_WR_SEND_WITH_IMM:
+			hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
+			hdr->immdt = ntohl(wr->ex.imm_data);
+		case IB_WR_SEND:
+			hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
+			ocrdma_build_send(qp, hdr, wr);
+			break;
+		case IB_WR_SEND_WITH_INV:
+			hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT);
+			hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
+			hdr->lkey = wr->ex.invalidate_rkey;
+			status = ocrdma_build_send(qp, hdr, wr);
+			break;
+		case IB_WR_RDMA_WRITE_WITH_IMM:
+			hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
+			hdr->immdt = ntohl(wr->ex.imm_data);
+		case IB_WR_RDMA_WRITE:
+			hdr->cw |= (OCRDMA_WRITE << OCRDMA_WQE_OPCODE_SHIFT);
+			status = ocrdma_build_write(qp, hdr, wr);
+			break;
+		case IB_WR_RDMA_READ_WITH_INV:
+			hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT);
+		case IB_WR_RDMA_READ:
+			ocrdma_build_read(qp, hdr, wr);
+			break;
+		case IB_WR_LOCAL_INV:
+			hdr->cw |=
+			    (OCRDMA_LKEY_INV << OCRDMA_WQE_OPCODE_SHIFT);
+			hdr->cw |= (sizeof(struct ocrdma_hdr_wqe) /
+				OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT;
+			hdr->lkey = wr->ex.invalidate_rkey;
+			break;
+		default:
+			status = -EINVAL;
+			break;
+		}
+		if (status) {
+			*bad_wr = wr;
+			break;
+		}
+		if (wr->send_flags & IB_SEND_SIGNALED)
+			qp->wqe_wr_id_tbl[qp->sq.head].signaled = 1;
+		else
+			qp->wqe_wr_id_tbl[qp->sq.head].signaled = 0;
+		qp->wqe_wr_id_tbl[qp->sq.head].wrid = wr->wr_id;
+		ocrdma_cpu_to_le32(hdr, ((hdr->cw >> OCRDMA_WQE_SIZE_SHIFT) &
+				   OCRDMA_WQE_SIZE_MASK) * OCRDMA_WQE_STRIDE);
+		/* make sure wqe is written before adapter can access it */
+		wmb();
+		/* inform hw to start processing it */
+		ocrdma_ring_sq_db(qp);
+
+		/* update pointer, counter for next wr */
+		ocrdma_hwq_inc_head(&qp->sq);
+		wr = wr->next;
+	}
+	spin_unlock_irqrestore(&qp->q_lock, flags);
+	return status;
+}
+
+static void ocrdma_ring_rq_db(struct ocrdma_qp *qp)
+{
+	u32 val = qp->rq.dbid | (1 << OCRDMA_GET_NUM_POSTED_SHIFT_VAL(qp));
+
+	iowrite32(val, qp->rq_db);
+}
+
+static void ocrdma_build_rqe(struct ocrdma_hdr_wqe *rqe, struct ib_recv_wr *wr,
+			     u16 tag)
+{
+	u32 wqe_size = 0;
+	struct ocrdma_sge *sge;
+	if (wr->num_sge)
+		wqe_size = (wr->num_sge * sizeof(*sge)) + sizeof(*rqe);
+	else
+		wqe_size = sizeof(*sge) + sizeof(*rqe);
+
+	rqe->cw = ((wqe_size / OCRDMA_WQE_STRIDE) <<
+				OCRDMA_WQE_SIZE_SHIFT);
+	rqe->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
+	rqe->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
+	rqe->total_len = 0;
+	rqe->rsvd_tag = tag;
+	sge = (struct ocrdma_sge *)(rqe + 1);
+	ocrdma_build_sges(rqe, sge, wr->num_sge, wr->sg_list);
+	ocrdma_cpu_to_le32(rqe, wqe_size);
+}
+
+int ocrdma_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+		     struct ib_recv_wr **bad_wr)
+{
+	int status = 0;
+	unsigned long flags;
+	struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
+	struct ocrdma_hdr_wqe *rqe;
+
+	spin_lock_irqsave(&qp->q_lock, flags);
+	if (qp->state == OCRDMA_QPS_RST || qp->state == OCRDMA_QPS_ERR) {
+		spin_unlock_irqrestore(&qp->q_lock, flags);
+		*bad_wr = wr;
+		return -EINVAL;
+	}
+	while (wr) {
+		if (ocrdma_hwq_free_cnt(&qp->rq) == 0 ||
+		    wr->num_sge > qp->rq.max_sges) {
+			*bad_wr = wr;
+			status = -ENOMEM;
+			break;
+		}
+		rqe = ocrdma_hwq_head(&qp->rq);
+		ocrdma_build_rqe(rqe, wr, 0);
+
+		qp->rqe_wr_id_tbl[qp->rq.head] = wr->wr_id;
+		/* make sure rqe is written before adapter can access it */
+		wmb();
+
+		/* inform hw to start processing it */
+		ocrdma_ring_rq_db(qp);
+
+		/* update pointer, counter for next wr */
+		ocrdma_hwq_inc_head(&qp->rq);
+		wr = wr->next;
+	}
+	spin_unlock_irqrestore(&qp->q_lock, flags);
+	return status;
+}
+
+/* cqe for srq's rqe can potentially arrive out of order.
+ * index gives the entry in the shadow table where to store
+ * the wr_id. tag/index is returned in cqe to reference back
+ * for a given rqe.
+ */
+static int ocrdma_srq_get_idx(struct ocrdma_srq *srq)
+{
+	int row = 0;
+	int indx = 0;
+
+	for (row = 0; row < srq->bit_fields_len; row++) {
+		if (srq->idx_bit_fields[row]) {
+			indx = ffs(srq->idx_bit_fields[row]);
+			indx = (row * 32) + (indx - 1);
+			if (indx >= srq->rq.max_cnt)
+				BUG();
+			ocrdma_srq_toggle_bit(srq, indx);
+			break;
+		}
+	}
+
+	if (row == srq->bit_fields_len)
+		BUG();
+	return indx;
+}
+
+static void ocrdma_ring_srq_db(struct ocrdma_srq *srq)
+{
+	u32 val = srq->rq.dbid | (1 << 16);
+
+	iowrite32(val, srq->db + OCRDMA_DB_GEN2_SRQ_OFFSET);
+}
+
+int ocrdma_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+			 struct ib_recv_wr **bad_wr)
+{
+	int status = 0;
+	unsigned long flags;
+	struct ocrdma_srq *srq;
+	struct ocrdma_hdr_wqe *rqe;
+	u16 tag;
+
+	srq = get_ocrdma_srq(ibsrq);
+
+	spin_lock_irqsave(&srq->q_lock, flags);
+	while (wr) {
+		if (ocrdma_hwq_free_cnt(&srq->rq) == 0 ||
+		    wr->num_sge > srq->rq.max_sges) {
+			status = -ENOMEM;
+			*bad_wr = wr;
+			break;
+		}
+		tag = ocrdma_srq_get_idx(srq);
+		rqe = ocrdma_hwq_head(&srq->rq);
+		ocrdma_build_rqe(rqe, wr, tag);
+
+		srq->rqe_wr_id_tbl[tag] = wr->wr_id;
+		/* make sure rqe is written before adapter can perform DMA */
+		wmb();
+		/* inform hw to start processing it */
+		ocrdma_ring_srq_db(srq);
+		/* update pointer, counter for next wr */
+		ocrdma_hwq_inc_head(&srq->rq);
+		wr = wr->next;
+	}
+	spin_unlock_irqrestore(&srq->q_lock, flags);
+	return status;
+}
+
+static enum ib_wc_status ocrdma_to_ibwc_err(u16 status)
+{
+	enum ib_wc_status ibwc_status = IB_WC_GENERAL_ERR;
+
+	switch (status) {
+	case OCRDMA_CQE_GENERAL_ERR:
+		ibwc_status = IB_WC_GENERAL_ERR;
+		break;
+	case OCRDMA_CQE_LOC_LEN_ERR:
+		ibwc_status = IB_WC_LOC_LEN_ERR;
+		break;
+	case OCRDMA_CQE_LOC_QP_OP_ERR:
+		ibwc_status = IB_WC_LOC_QP_OP_ERR;
+		break;
+	case OCRDMA_CQE_LOC_EEC_OP_ERR:
+		ibwc_status = IB_WC_LOC_EEC_OP_ERR;
+		break;
+	case OCRDMA_CQE_LOC_PROT_ERR:
+		ibwc_status = IB_WC_LOC_PROT_ERR;
+		break;
+	case OCRDMA_CQE_WR_FLUSH_ERR:
+		ibwc_status = IB_WC_WR_FLUSH_ERR;
+		break;
+	case OCRDMA_CQE_MW_BIND_ERR:
+		ibwc_status = IB_WC_MW_BIND_ERR;
+		break;
+	case OCRDMA_CQE_BAD_RESP_ERR:
+		ibwc_status = IB_WC_BAD_RESP_ERR;
+		break;
+	case OCRDMA_CQE_LOC_ACCESS_ERR:
+		ibwc_status = IB_WC_LOC_ACCESS_ERR;
+		break;
+	case OCRDMA_CQE_REM_INV_REQ_ERR:
+		ibwc_status = IB_WC_REM_INV_REQ_ERR;
+		break;
+	case OCRDMA_CQE_REM_ACCESS_ERR:
+		ibwc_status = IB_WC_REM_ACCESS_ERR;
+		break;
+	case OCRDMA_CQE_REM_OP_ERR:
+		ibwc_status = IB_WC_REM_OP_ERR;
+		break;
+	case OCRDMA_CQE_RETRY_EXC_ERR:
+		ibwc_status = IB_WC_RETRY_EXC_ERR;
+		break;
+	case OCRDMA_CQE_RNR_RETRY_EXC_ERR:
+		ibwc_status = IB_WC_RNR_RETRY_EXC_ERR;
+		break;
+	case OCRDMA_CQE_LOC_RDD_VIOL_ERR:
+		ibwc_status = IB_WC_LOC_RDD_VIOL_ERR;
+		break;
+	case OCRDMA_CQE_REM_INV_RD_REQ_ERR:
+		ibwc_status = IB_WC_REM_INV_RD_REQ_ERR;
+		break;
+	case OCRDMA_CQE_REM_ABORT_ERR:
+		ibwc_status = IB_WC_REM_ABORT_ERR;
+		break;
+	case OCRDMA_CQE_INV_EECN_ERR:
+		ibwc_status = IB_WC_INV_EECN_ERR;
+		break;
+	case OCRDMA_CQE_INV_EEC_STATE_ERR:
+		ibwc_status = IB_WC_INV_EEC_STATE_ERR;
+		break;
+	case OCRDMA_CQE_FATAL_ERR:
+		ibwc_status = IB_WC_FATAL_ERR;
+		break;
+	case OCRDMA_CQE_RESP_TIMEOUT_ERR:
+		ibwc_status = IB_WC_RESP_TIMEOUT_ERR;
+		break;
+	default:
+		ibwc_status = IB_WC_GENERAL_ERR;
+		break;
+	};
+	return ibwc_status;
+}
+
+static void ocrdma_update_wc(struct ocrdma_qp *qp, struct ib_wc *ibwc,
+		      u32 wqe_idx)
+{
+	struct ocrdma_hdr_wqe *hdr;
+	struct ocrdma_sge *rw;
+	int opcode;
+
+	hdr = ocrdma_hwq_head_from_idx(&qp->sq, wqe_idx);
+
+	ibwc->wr_id = qp->wqe_wr_id_tbl[wqe_idx].wrid;
+	/* Undo the hdr->cw swap */
+	opcode = le32_to_cpu(hdr->cw) & OCRDMA_WQE_OPCODE_MASK;
+	switch (opcode) {
+	case OCRDMA_WRITE:
+		ibwc->opcode = IB_WC_RDMA_WRITE;
+		break;
+	case OCRDMA_READ:
+		rw = (struct ocrdma_sge *)(hdr + 1);
+		ibwc->opcode = IB_WC_RDMA_READ;
+		ibwc->byte_len = rw->len;
+		break;
+	case OCRDMA_SEND:
+		ibwc->opcode = IB_WC_SEND;
+		break;
+	case OCRDMA_LKEY_INV:
+		ibwc->opcode = IB_WC_LOCAL_INV;
+		break;
+	default:
+		ibwc->status = IB_WC_GENERAL_ERR;
+		ocrdma_err("%s() invalid opcode received = 0x%x\n",
+			   __func__, hdr->cw & OCRDMA_WQE_OPCODE_MASK);
+		break;
+	};
+}
+
+static void ocrdma_set_cqe_status_flushed(struct ocrdma_qp *qp,
+						struct ocrdma_cqe *cqe)
+{
+	if (is_cqe_for_sq(cqe)) {
+		cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+				cqe->flags_status_srcqpn) &
+					~OCRDMA_CQE_STATUS_MASK);
+		cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+				cqe->flags_status_srcqpn) |
+				(OCRDMA_CQE_WR_FLUSH_ERR <<
+					OCRDMA_CQE_STATUS_SHIFT));
+	} else {
+		if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
+			cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+					cqe->flags_status_srcqpn) &
+						~OCRDMA_CQE_UD_STATUS_MASK);
+			cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+					cqe->flags_status_srcqpn) |
+					(OCRDMA_CQE_WR_FLUSH_ERR <<
+						OCRDMA_CQE_UD_STATUS_SHIFT));
+		} else {
+			cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+					cqe->flags_status_srcqpn) &
+						~OCRDMA_CQE_STATUS_MASK);
+			cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+					cqe->flags_status_srcqpn) |
+					(OCRDMA_CQE_WR_FLUSH_ERR <<
+						OCRDMA_CQE_STATUS_SHIFT));
+		}
+	}
+}
+
+static bool ocrdma_update_err_cqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
+				  struct ocrdma_qp *qp, int status)
+{
+	bool expand = false;
+
+	ibwc->byte_len = 0;
+	ibwc->qp = &qp->ibqp;
+	ibwc->status = ocrdma_to_ibwc_err(status);
+
+	ocrdma_flush_qp(qp);
+	ocrdma_qp_state_machine(qp, IB_QPS_ERR, NULL);
+
+	/* if wqe/rqe pending for which cqe needs to be returned,
+	 * trigger inflating it.
+	 */
+	if (!is_hw_rq_empty(qp) || !is_hw_sq_empty(qp)) {
+		expand = true;
+		ocrdma_set_cqe_status_flushed(qp, cqe);
+	}
+	return expand;
+}
+
+static int ocrdma_update_err_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
+				  struct ocrdma_qp *qp, int status)
+{
+	ibwc->opcode = IB_WC_RECV;
+	ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
+	ocrdma_hwq_inc_tail(&qp->rq);
+
+	return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
+}
+
+static int ocrdma_update_err_scqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
+				  struct ocrdma_qp *qp, int status)
+{
+	ocrdma_update_wc(qp, ibwc, qp->sq.tail);
+	ocrdma_hwq_inc_tail(&qp->sq);
+
+	return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
+}
+
+
+static bool ocrdma_poll_err_scqe(struct ocrdma_qp *qp,
+				 struct ocrdma_cqe *cqe, struct ib_wc *ibwc,
+				 bool *polled, bool *stop)
+{
+	bool expand;
+	int status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+		OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
+
+	/* when hw sq is empty, but rq is not empty, so we continue
+	 * to keep the cqe in order to get the cq event again.
+	 */
+	if (is_hw_sq_empty(qp) && !is_hw_rq_empty(qp)) {
+		/* when cq for rq and sq is same, it is safe to return
+		 * flush cqe for RQEs.
+		 */
+		if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
+			*polled = true;
+			status = OCRDMA_CQE_WR_FLUSH_ERR;
+			expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
+		} else {
+			/* stop processing further cqe as this cqe is used for
+			 * triggering cq event on buddy cq of RQ.
+			 * When QP is destroyed, this cqe will be removed
+			 * from the cq's hardware q.
+			 */
+			*polled = false;
+			*stop = true;
+			expand = false;
+		}
+	} else {
+		*polled = true;
+		expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
+	}
+	return expand;
+}
+
+static bool ocrdma_poll_success_scqe(struct ocrdma_qp *qp,
+				     struct ocrdma_cqe *cqe,
+				     struct ib_wc *ibwc, bool *polled)
+{
+	bool expand = false;
+	int tail = qp->sq.tail;
+	u32 wqe_idx;
+
+	if (!qp->wqe_wr_id_tbl[tail].signaled) {
+		expand = true;	/* CQE cannot be consumed yet */
+		*polled = false;    /* WC cannot be consumed yet */
+	} else {
+		ibwc->status = IB_WC_SUCCESS;
+		ibwc->wc_flags = 0;
+		ibwc->qp = &qp->ibqp;
+		ocrdma_update_wc(qp, ibwc, tail);
+		*polled = true;
+		wqe_idx = le32_to_cpu(cqe->wq.wqeidx) &	OCRDMA_CQE_WQEIDX_MASK;
+		if (tail != wqe_idx)
+			expand = true; /* Coalesced CQE can't be consumed yet */
+	}
+	ocrdma_hwq_inc_tail(&qp->sq);
+	return expand;
+}
+
+static bool ocrdma_poll_scqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
+			     struct ib_wc *ibwc, bool *polled, bool *stop)
+{
+	int status;
+	bool expand;
+
+	status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+		OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
+
+	if (status == OCRDMA_CQE_SUCCESS)
+		expand = ocrdma_poll_success_scqe(qp, cqe, ibwc, polled);
+	else
+		expand = ocrdma_poll_err_scqe(qp, cqe, ibwc, polled, stop);
+	return expand;
+}
+
+static int ocrdma_update_ud_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe)
+{
+	int status;
+
+	status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+		OCRDMA_CQE_UD_STATUS_MASK) >> OCRDMA_CQE_UD_STATUS_SHIFT;
+	ibwc->src_qp = le32_to_cpu(cqe->flags_status_srcqpn) &
+						OCRDMA_CQE_SRCQP_MASK;
+	ibwc->pkey_index = le32_to_cpu(cqe->ud.rxlen_pkey) &
+						OCRDMA_CQE_PKEY_MASK;
+	ibwc->wc_flags = IB_WC_GRH;
+	ibwc->byte_len = (le32_to_cpu(cqe->ud.rxlen_pkey) >>
+					OCRDMA_CQE_UD_XFER_LEN_SHIFT);
+	return status;
+}
+
+static void ocrdma_update_free_srq_cqe(struct ib_wc *ibwc,
+				       struct ocrdma_cqe *cqe,
+				       struct ocrdma_qp *qp)
+{
+	unsigned long flags;
+	struct ocrdma_srq *srq;
+	u32 wqe_idx;
+
+	srq = get_ocrdma_srq(qp->ibqp.srq);
+	wqe_idx = le32_to_cpu(cqe->rq.buftag_qpn) >> OCRDMA_CQE_BUFTAG_SHIFT;
+	ibwc->wr_id = srq->rqe_wr_id_tbl[wqe_idx];
+	spin_lock_irqsave(&srq->q_lock, flags);
+	ocrdma_srq_toggle_bit(srq, wqe_idx);
+	spin_unlock_irqrestore(&srq->q_lock, flags);
+	ocrdma_hwq_inc_tail(&srq->rq);
+}
+
+static bool ocrdma_poll_err_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
+				struct ib_wc *ibwc, bool *polled, bool *stop,
+				int status)
+{
+	bool expand;
+
+	/* when hw_rq is empty, but wq is not empty, so continue
+	 * to keep the cqe to get the cq event again.
+	 */
+	if (is_hw_rq_empty(qp) && !is_hw_sq_empty(qp)) {
+		if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
+			*polled = true;
+			status = OCRDMA_CQE_WR_FLUSH_ERR;
+			expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
+		} else {
+			*polled = false;
+			*stop = true;
+			expand = false;
+		}
+	} else
+		expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
+	return expand;
+}
+
+static void ocrdma_poll_success_rcqe(struct ocrdma_qp *qp,
+				     struct ocrdma_cqe *cqe, struct ib_wc *ibwc)
+{
+	ibwc->opcode = IB_WC_RECV;
+	ibwc->qp = &qp->ibqp;
+	ibwc->status = IB_WC_SUCCESS;
+
+	if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI)
+		ocrdma_update_ud_rcqe(ibwc, cqe);
+	else
+		ibwc->byte_len = le32_to_cpu(cqe->rq.rxlen);
+
+	if (is_cqe_imm(cqe)) {
+		ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
+		ibwc->wc_flags |= IB_WC_WITH_IMM;
+	} else if (is_cqe_wr_imm(cqe)) {
+		ibwc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
+		ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
+		ibwc->wc_flags |= IB_WC_WITH_IMM;
+	} else if (is_cqe_invalidated(cqe)) {
+		ibwc->ex.invalidate_rkey = le32_to_cpu(cqe->rq.lkey_immdt);
+		ibwc->wc_flags |= IB_WC_WITH_INVALIDATE;
+	}
+	if (qp->ibqp.srq)
+		ocrdma_update_free_srq_cqe(ibwc, cqe, qp);
+	else {
+		ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
+		ocrdma_hwq_inc_tail(&qp->rq);
+	}
+}
+
+static bool ocrdma_poll_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
+			     struct ib_wc *ibwc, bool *polled, bool *stop)
+{
+	int status;
+	bool expand = false;
+
+	ibwc->wc_flags = 0;
+	if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI)
+		status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+					OCRDMA_CQE_UD_STATUS_MASK) >>
+					OCRDMA_CQE_UD_STATUS_SHIFT;
+	else
+		status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+			     OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
+
+	if (status == OCRDMA_CQE_SUCCESS) {
+		*polled = true;
+		ocrdma_poll_success_rcqe(qp, cqe, ibwc);
+	} else {
+		expand = ocrdma_poll_err_rcqe(qp, cqe, ibwc, polled, stop,
+					      status);
+	}
+	return expand;
+}
+
+static void ocrdma_change_cq_phase(struct ocrdma_cq *cq, struct ocrdma_cqe *cqe,
+				   u16 cur_getp)
+{
+	if (cq->phase_change) {
+		if (cur_getp == 0)
+			cq->phase = (~cq->phase & OCRDMA_CQE_VALID);
+	} else
+		/* clear valid bit */
+		cqe->flags_status_srcqpn = 0;
+}
+
+static int ocrdma_poll_hwcq(struct ocrdma_cq *cq, int num_entries,
+			    struct ib_wc *ibwc)
+{
+	u16 qpn = 0;
+	int i = 0;
+	bool expand = false;
+	int polled_hw_cqes = 0;
+	struct ocrdma_qp *qp = NULL;
+	struct ocrdma_dev *dev = cq->dev;
+	struct ocrdma_cqe *cqe;
+	u16 cur_getp; bool polled = false; bool stop = false;
+
+	cur_getp = cq->getp;
+	while (num_entries) {
+		cqe = cq->va + cur_getp;
+		/* check whether valid cqe or not */
+		if (!is_cqe_valid(cq, cqe))
+			break;
+		qpn = (le32_to_cpu(cqe->cmn.qpn) & OCRDMA_CQE_QPN_MASK);
+		/* ignore discarded cqe */
+		if (qpn == 0)
+			goto skip_cqe;
+		qp = dev->qp_tbl[qpn];
+		BUG_ON(qp == NULL);
+
+		if (is_cqe_for_sq(cqe)) {
+			expand = ocrdma_poll_scqe(qp, cqe, ibwc, &polled,
+						  &stop);
+		} else {
+			expand = ocrdma_poll_rcqe(qp, cqe, ibwc, &polled,
+						  &stop);
+		}
+		if (expand)
+			goto expand_cqe;
+		if (stop)
+			goto stop_cqe;
+		/* clear qpn to avoid duplicate processing by discard_cqe() */
+		cqe->cmn.qpn = 0;
+skip_cqe:
+		polled_hw_cqes += 1;
+		cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
+		ocrdma_change_cq_phase(cq, cqe, cur_getp);
+expand_cqe:
+		if (polled) {
+			num_entries -= 1;
+			i += 1;
+			ibwc = ibwc + 1;
+			polled = false;
+		}
+	}
+stop_cqe:
+	cq->getp = cur_getp;
+	if (polled_hw_cqes || expand || stop) {
+		ocrdma_ring_cq_db(dev, cq->id, cq->armed, cq->solicited,
+				  polled_hw_cqes);
+	}
+	return i;
+}
+
+/* insert error cqe if the QP's SQ or RQ's CQ matches the CQ under poll. */
+static int ocrdma_add_err_cqe(struct ocrdma_cq *cq, int num_entries,
+			      struct ocrdma_qp *qp, struct ib_wc *ibwc)
+{
+	int err_cqes = 0;
+
+	while (num_entries) {
+		if (is_hw_sq_empty(qp) && is_hw_rq_empty(qp))
+			break;
+		if (!is_hw_sq_empty(qp) && qp->sq_cq == cq) {
+			ocrdma_update_wc(qp, ibwc, qp->sq.tail);
+			ocrdma_hwq_inc_tail(&qp->sq);
+		} else if (!is_hw_rq_empty(qp) && qp->rq_cq == cq) {
+			ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
+			ocrdma_hwq_inc_tail(&qp->rq);
+		} else
+			return err_cqes;
+		ibwc->byte_len = 0;
+		ibwc->status = IB_WC_WR_FLUSH_ERR;
+		ibwc = ibwc + 1;
+		err_cqes += 1;
+		num_entries -= 1;
+	}
+	return err_cqes;
+}
+
+int ocrdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
+{
+	int cqes_to_poll = num_entries;
+	struct ocrdma_cq *cq = NULL;
+	unsigned long flags;
+	struct ocrdma_dev *dev;
+	int num_os_cqe = 0, err_cqes = 0;
+	struct ocrdma_qp *qp;
+
+	cq = get_ocrdma_cq(ibcq);
+	dev = cq->dev;
+
+	/* poll cqes from adapter CQ */
+	spin_lock_irqsave(&cq->cq_lock, flags);
+	num_os_cqe = ocrdma_poll_hwcq(cq, cqes_to_poll, wc);
+	spin_unlock_irqrestore(&cq->cq_lock, flags);
+	cqes_to_poll -= num_os_cqe;
+
+	if (cqes_to_poll) {
+		wc = wc + num_os_cqe;
+		/* adapter returns single error cqe when qp moves to
+		 * error state. So insert error cqes with wc_status as
+		 * FLUSHED for pending WQEs and RQEs of QP's SQ and RQ
+		 * respectively which uses this CQ.
+		 */
+		spin_lock_irqsave(&dev->flush_q_lock, flags);
+		list_for_each_entry(qp, &cq->sq_head, sq_entry) {
+			if (cqes_to_poll == 0)
+				break;
+			err_cqes = ocrdma_add_err_cqe(cq, cqes_to_poll, qp, wc);
+			cqes_to_poll -= err_cqes;
+			num_os_cqe += err_cqes;
+			wc = wc + err_cqes;
+		}
+		spin_unlock_irqrestore(&dev->flush_q_lock, flags);
+	}
+	return num_os_cqe;
+}
+
+int ocrdma_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags cq_flags)
+{
+	struct ocrdma_cq *cq;
+	unsigned long flags;
+	struct ocrdma_dev *dev;
+	u16 cq_id;
+	u16 cur_getp;
+	struct ocrdma_cqe *cqe;
+
+	cq = get_ocrdma_cq(ibcq);
+	cq_id = cq->id;
+	dev = cq->dev;
+
+	spin_lock_irqsave(&cq->cq_lock, flags);
+	if (cq_flags & IB_CQ_NEXT_COMP || cq_flags & IB_CQ_SOLICITED)
+		cq->armed = true;
+	if (cq_flags & IB_CQ_SOLICITED)
+		cq->solicited = true;
+
+	cur_getp = cq->getp;
+	cqe = cq->va + cur_getp;
+
+	/* check whether any valid cqe exist or not, if not then safe to
+	 * arm. If cqe is not yet consumed, then let it get consumed and then
+	 * we arm it to avoid false interrupts.
+	 */
+	if (!is_cqe_valid(cq, cqe) || cq->arm_needed) {
+		cq->arm_needed = false;
+		ocrdma_ring_cq_db(dev, cq_id, cq->armed, cq->solicited, 0);
+	}
+	spin_unlock_irqrestore(&cq->cq_lock, flags);
+	return 0;
+}
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h
new file mode 100644
index 0000000..e648343
--- /dev/null
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h
@@ -0,0 +1,94 @@
+/*******************************************************************
+ * This file is part of the Emulex RoCE Device Driver for          *
+ * RoCE (RDMA over Converged Ethernet) adapters.                   *
+ * Copyright (C) 2008-2012 Emulex. All rights reserved.            *
+ * EMULEX and SLI are trademarks of Emulex.                        *
+ * www.emulex.com                                                  *
+ *                                                                 *
+ * This program is free software; you can redistribute it and/or   *
+ * modify it under the terms of version 2 of the GNU General       *
+ * Public License as published by the Free Software Foundation.    *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
+ * more details, a copy of which can be found in the file COPYING  *
+ * included with this package.                                     *
+ *
+ * Contact Information:
+ * linux-drivers@xxxxxxxxxx
+ *
+ * Emulex
+ * 3333 Susan Street
+ * Costa Mesa, CA 92626
+ *******************************************************************/
+
+#ifndef __OCRDMA_VERBS_H__
+#define __OCRDMA_VERBS_H__
+
+#include <linux/version.h>
+int ocrdma_post_send(struct ib_qp *, struct ib_send_wr *,
+		     struct ib_send_wr **bad_wr);
+int ocrdma_post_recv(struct ib_qp *, struct ib_recv_wr *,
+		     struct ib_recv_wr **bad_wr);
+
+int ocrdma_poll_cq(struct ib_cq *, int num_entries, struct ib_wc *wc);
+int ocrdma_arm_cq(struct ib_cq *, enum ib_cq_notify_flags flags);
+
+int ocrdma_query_device(struct ib_device *, struct ib_device_attr *props);
+int ocrdma_query_port(struct ib_device *, u8 port, struct ib_port_attr *props);
+int ocrdma_modify_port(struct ib_device *, u8 port, int mask,
+		       struct ib_port_modify *props);
+
+void ocrdma_get_guid(struct ocrdma_dev *, u8 *guid);
+int ocrdma_query_gid(struct ib_device *, u8 port,
+		     int index, union ib_gid *gid);
+int ocrdma_query_pkey(struct ib_device *, u8 port, u16 index, u16 *pkey);
+
+struct ib_ucontext *ocrdma_alloc_ucontext(struct ib_device *,
+					  struct ib_udata *);
+int ocrdma_dealloc_ucontext(struct ib_ucontext *);
+
+int ocrdma_mmap(struct ib_ucontext *, struct vm_area_struct *vma);
+
+struct ib_pd *ocrdma_alloc_pd(struct ib_device *,
+			      struct ib_ucontext *, struct ib_udata *);
+int ocrdma_dealloc_pd(struct ib_pd *pd);
+
+struct ib_cq *ocrdma_create_cq(struct ib_device *, int entries, int vector,
+			       struct ib_ucontext *, struct ib_udata *);
+int ocrdma_resize_cq(struct ib_cq *, int cqe, struct ib_udata *);
+int ocrdma_destroy_cq(struct ib_cq *);
+
+struct ib_qp *ocrdma_create_qp(struct ib_pd *,
+			       struct ib_qp_init_attr *attrs,
+			       struct ib_udata *);
+int _ocrdma_modify_qp(struct ib_qp *, struct ib_qp_attr *attr,
+		      int attr_mask);
+int ocrdma_modify_qp(struct ib_qp *, struct ib_qp_attr *attr,
+		     int attr_mask, struct ib_udata *udata);
+int ocrdma_query_qp(struct ib_qp *,
+		    struct ib_qp_attr *qp_attr,
+		    int qp_attr_mask, struct ib_qp_init_attr *);
+int ocrdma_destroy_qp(struct ib_qp *);
+
+struct ib_srq *ocrdma_create_srq(struct ib_pd *, struct ib_srq_init_attr *,
+				 struct ib_udata *);
+int ocrdma_modify_srq(struct ib_srq *, struct ib_srq_attr *,
+		      enum ib_srq_attr_mask, struct ib_udata *);
+int ocrdma_query_srq(struct ib_srq *, struct ib_srq_attr *);
+int ocrdma_destroy_srq(struct ib_srq *);
+int ocrdma_post_srq_recv(struct ib_srq *, struct ib_recv_wr *,
+			 struct ib_recv_wr **bad_recv_wr);
+
+int ocrdma_dereg_mr(struct ib_mr *);
+struct ib_mr *ocrdma_get_dma_mr(struct ib_pd *, int acc);
+struct ib_mr *ocrdma_reg_kernel_mr(struct ib_pd *,
+				   struct ib_phys_buf *buffer_list,
+				   int num_phys_buf, int acc, u64 *iova_start);
+struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *, u64 start, u64 length,
+				 u64 virt, int acc, struct ib_udata *);
+
+#endif				/* __OCRDMA_VERBS_H__ */
-- 
1.6.0.2

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