/* This file is part of the Emulex RoCE Device Driver for
 * RoCE (RDMA over Converged Ethernet) adapters.
 * Copyright (C) 2012-2015 Emulex. All rights reserved.
 * EMULEX and SLI are trademarks of Emulex.
 * www.emulex.com
 *
 * This software is available to you under a choice of one of two licenses.
 * You may choose to be licensed under the terms of the GNU General Public
 * License (GPL) Version 2, available from the file COPYING in the main
 * directory of this source tree, or the BSD license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 */

#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/log2.h>
#include <linux/dma-mapping.h>
#include <linux/if_ether.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_cache.h>

#include "ocrdma.h"
#include "ocrdma_hw.h"
#include "ocrdma_verbs.h"
#include "ocrdma_ah.h"

enum mbx_status {
        OCRDMA_MBX_STATUS_FAILED                = 1,
        OCRDMA_MBX_STATUS_ILLEGAL_FIELD         = 3,
        OCRDMA_MBX_STATUS_OOR                   = 100,
        OCRDMA_MBX_STATUS_INVALID_PD            = 101,
        OCRDMA_MBX_STATUS_PD_INUSE              = 102,
        OCRDMA_MBX_STATUS_INVALID_CQ            = 103,
        OCRDMA_MBX_STATUS_INVALID_QP            = 104,
        OCRDMA_MBX_STATUS_INVALID_LKEY          = 105,
        OCRDMA_MBX_STATUS_ORD_EXCEEDS           = 106,
        OCRDMA_MBX_STATUS_IRD_EXCEEDS           = 107,
        OCRDMA_MBX_STATUS_SENDQ_WQE_EXCEEDS     = 108,
        OCRDMA_MBX_STATUS_RECVQ_RQE_EXCEEDS     = 109,
        OCRDMA_MBX_STATUS_SGE_SEND_EXCEEDS      = 110,
        OCRDMA_MBX_STATUS_SGE_WRITE_EXCEEDS     = 111,
        OCRDMA_MBX_STATUS_SGE_RECV_EXCEEDS      = 112,
        OCRDMA_MBX_STATUS_INVALID_STATE_CHANGE  = 113,
        OCRDMA_MBX_STATUS_MW_BOUND              = 114,
        OCRDMA_MBX_STATUS_INVALID_VA            = 115,
        OCRDMA_MBX_STATUS_INVALID_LENGTH        = 116,
        OCRDMA_MBX_STATUS_INVALID_FBO           = 117,
        OCRDMA_MBX_STATUS_INVALID_ACC_RIGHTS    = 118,
        OCRDMA_MBX_STATUS_INVALID_PBE_SIZE      = 119,
        OCRDMA_MBX_STATUS_INVALID_PBL_ENTRY     = 120,
        OCRDMA_MBX_STATUS_INVALID_PBL_SHIFT     = 121,
        OCRDMA_MBX_STATUS_INVALID_SRQ_ID        = 129,
        OCRDMA_MBX_STATUS_SRQ_ERROR             = 133,
        OCRDMA_MBX_STATUS_RQE_EXCEEDS           = 134,
        OCRDMA_MBX_STATUS_MTU_EXCEEDS           = 135,
        OCRDMA_MBX_STATUS_MAX_QP_EXCEEDS        = 136,
        OCRDMA_MBX_STATUS_SRQ_LIMIT_EXCEEDS     = 137,
        OCRDMA_MBX_STATUS_SRQ_SIZE_UNDERUNS     = 138,
        OCRDMA_MBX_STATUS_QP_BOUND              = 130,
        OCRDMA_MBX_STATUS_INVALID_CHANGE        = 139,
        OCRDMA_MBX_STATUS_ATOMIC_OPS_UNSUP      = 140,
        OCRDMA_MBX_STATUS_INVALID_RNR_NAK_TIMER = 141,
        OCRDMA_MBX_STATUS_MW_STILL_BOUND        = 142,
        OCRDMA_MBX_STATUS_PKEY_INDEX_INVALID    = 143,
        OCRDMA_MBX_STATUS_PKEY_INDEX_EXCEEDS    = 144
};

enum additional_status {
        OCRDMA_MBX_ADDI_STATUS_INSUFFICIENT_RESOURCES = 22
};

enum cqe_status {
        OCRDMA_MBX_CQE_STATUS_INSUFFICIENT_PRIVILEDGES  = 1,
        OCRDMA_MBX_CQE_STATUS_INVALID_PARAMETER         = 2,
        OCRDMA_MBX_CQE_STATUS_INSUFFICIENT_RESOURCES    = 3,
        OCRDMA_MBX_CQE_STATUS_QUEUE_FLUSHING            = 4,
        OCRDMA_MBX_CQE_STATUS_DMA_FAILED                = 5
};

static inline void *ocrdma_get_eqe(struct ocrdma_eq *eq)
{
        return eq->q.va + (eq->q.tail * sizeof(struct ocrdma_eqe));
}

static inline void ocrdma_eq_inc_tail(struct ocrdma_eq *eq)
{
        eq->q.tail = (eq->q.tail + 1) & (OCRDMA_EQ_LEN - 1);
}

static inline void *ocrdma_get_mcqe(struct ocrdma_dev *dev)
{
        struct ocrdma_mcqe *cqe = (struct ocrdma_mcqe *)
            (dev->mq.cq.va + (dev->mq.cq.tail * sizeof(struct ocrdma_mcqe)));

        if (!(le32_to_cpu(cqe->valid_ae_cmpl_cons) & OCRDMA_MCQE_VALID_MASK))
                return NULL;
        return cqe;
}

static inline void ocrdma_mcq_inc_tail(struct ocrdma_dev *dev)
{
        dev->mq.cq.tail = (dev->mq.cq.tail + 1) & (OCRDMA_MQ_CQ_LEN - 1);
}

static inline struct ocrdma_mqe *ocrdma_get_mqe(struct ocrdma_dev *dev)
{
        return dev->mq.sq.va + (dev->mq.sq.head * sizeof(struct ocrdma_mqe));
}

static inline void ocrdma_mq_inc_head(struct ocrdma_dev *dev)
{
        dev->mq.sq.head = (dev->mq.sq.head + 1) & (OCRDMA_MQ_LEN - 1);
}

static inline void *ocrdma_get_mqe_rsp(struct ocrdma_dev *dev)
{
        return dev->mq.sq.va + (dev->mqe_ctx.tag * sizeof(struct ocrdma_mqe));
}

enum ib_qp_state get_ibqp_state(enum ocrdma_qp_state qps)
{
        switch (qps) {
        case OCRDMA_QPS_RST:
                return IB_QPS_RESET;
        case OCRDMA_QPS_INIT:
                return IB_QPS_INIT;
        case OCRDMA_QPS_RTR:
                return IB_QPS_RTR;
        case OCRDMA_QPS_RTS:
                return IB_QPS_RTS;
        case OCRDMA_QPS_SQD:
        case OCRDMA_QPS_SQ_DRAINING:
                return IB_QPS_SQD;
        case OCRDMA_QPS_SQE:
                return IB_QPS_SQE;
        case OCRDMA_QPS_ERR:
                return IB_QPS_ERR;
        }
        return IB_QPS_ERR;
}

static enum ocrdma_qp_state get_ocrdma_qp_state(enum ib_qp_state qps)
{
        switch (qps) {
        case IB_QPS_RESET:
                return OCRDMA_QPS_RST;
        case IB_QPS_INIT:
                return OCRDMA_QPS_INIT;
        case IB_QPS_RTR:
                return OCRDMA_QPS_RTR;
        case IB_QPS_RTS:
                return OCRDMA_QPS_RTS;
        case IB_QPS_SQD:
                return OCRDMA_QPS_SQD;
        case IB_QPS_SQE:
                return OCRDMA_QPS_SQE;
        case IB_QPS_ERR:
                return OCRDMA_QPS_ERR;
        }
        return OCRDMA_QPS_ERR;
}

static int ocrdma_get_mbx_errno(u32 status)
{
        int err_num;
        u8 mbox_status = (status & OCRDMA_MBX_RSP_STATUS_MASK) >>
                                        OCRDMA_MBX_RSP_STATUS_SHIFT;
        u8 add_status = (status & OCRDMA_MBX_RSP_ASTATUS_MASK) >>
                                        OCRDMA_MBX_RSP_ASTATUS_SHIFT;

        switch (mbox_status) {
        case OCRDMA_MBX_STATUS_OOR:
        case OCRDMA_MBX_STATUS_MAX_QP_EXCEEDS:
                err_num = -EAGAIN;
                break;

        case OCRDMA_MBX_STATUS_INVALID_PD:
        case OCRDMA_MBX_STATUS_INVALID_CQ:
        case OCRDMA_MBX_STATUS_INVALID_SRQ_ID:
        case OCRDMA_MBX_STATUS_INVALID_QP:
        case OCRDMA_MBX_STATUS_INVALID_CHANGE:
        case OCRDMA_MBX_STATUS_MTU_EXCEEDS:
        case OCRDMA_MBX_STATUS_INVALID_RNR_NAK_TIMER:
        case OCRDMA_MBX_STATUS_PKEY_INDEX_INVALID:
        case OCRDMA_MBX_STATUS_PKEY_INDEX_EXCEEDS:
        case OCRDMA_MBX_STATUS_ILLEGAL_FIELD:
        case OCRDMA_MBX_STATUS_INVALID_PBL_ENTRY:
        case OCRDMA_MBX_STATUS_INVALID_LKEY:
        case OCRDMA_MBX_STATUS_INVALID_VA:
        case OCRDMA_MBX_STATUS_INVALID_LENGTH:
        case OCRDMA_MBX_STATUS_INVALID_FBO:
        case OCRDMA_MBX_STATUS_INVALID_ACC_RIGHTS:
        case OCRDMA_MBX_STATUS_INVALID_PBE_SIZE:
        case OCRDMA_MBX_STATUS_ATOMIC_OPS_UNSUP:
        case OCRDMA_MBX_STATUS_SRQ_ERROR:
        case OCRDMA_MBX_STATUS_SRQ_SIZE_UNDERUNS:
                err_num = -EINVAL;
                break;

        case OCRDMA_MBX_STATUS_PD_INUSE:
        case OCRDMA_MBX_STATUS_QP_BOUND:
        case OCRDMA_MBX_STATUS_MW_STILL_BOUND:
        case OCRDMA_MBX_STATUS_MW_BOUND:
                err_num = -EBUSY;
                break;

        case OCRDMA_MBX_STATUS_RECVQ_RQE_EXCEEDS:
        case OCRDMA_MBX_STATUS_SGE_RECV_EXCEEDS:
        case OCRDMA_MBX_STATUS_RQE_EXCEEDS:
        case OCRDMA_MBX_STATUS_SRQ_LIMIT_EXCEEDS:
        case OCRDMA_MBX_STATUS_ORD_EXCEEDS:
        case OCRDMA_MBX_STATUS_IRD_EXCEEDS:
        case OCRDMA_MBX_STATUS_SENDQ_WQE_EXCEEDS:
        case OCRDMA_MBX_STATUS_SGE_SEND_EXCEEDS:
        case OCRDMA_MBX_STATUS_SGE_WRITE_EXCEEDS:
                err_num = -ENOBUFS;
                break;

        case OCRDMA_MBX_STATUS_FAILED:
                switch (add_status) {
                case OCRDMA_MBX_ADDI_STATUS_INSUFFICIENT_RESOURCES:
                        err_num = -EAGAIN;
                        break;
                default:
                        err_num = -EFAULT;
                }
                break;
        default:
                err_num = -EFAULT;
        }
        return err_num;
}

char *port_speed_string(struct ocrdma_dev *dev)
{
        char *str = "";
        u16 speeds_supported;

        speeds_supported = dev->phy.fixed_speeds_supported |
                                dev->phy.auto_speeds_supported;
        if (speeds_supported & OCRDMA_PHY_SPEED_40GBPS)
                str = "40Gbps ";
        else if (speeds_supported & OCRDMA_PHY_SPEED_10GBPS)
                str = "10Gbps ";
        else if (speeds_supported & OCRDMA_PHY_SPEED_1GBPS)
                str = "1Gbps ";

        return str;
}

static int ocrdma_get_mbx_cqe_errno(u16 cqe_status)
{
        int err_num = -EINVAL;

        switch (cqe_status) {
        case OCRDMA_MBX_CQE_STATUS_INSUFFICIENT_PRIVILEDGES:
                err_num = -EPERM;
                break;
        case OCRDMA_MBX_CQE_STATUS_INVALID_PARAMETER:
                err_num = -EINVAL;
                break;
        case OCRDMA_MBX_CQE_STATUS_INSUFFICIENT_RESOURCES:
        case OCRDMA_MBX_CQE_STATUS_QUEUE_FLUSHING:
                err_num = -EINVAL;
                break;
        case OCRDMA_MBX_CQE_STATUS_DMA_FAILED:
        default:
                err_num = -EINVAL;
                break;
        }
        return err_num;
}

void ocrdma_ring_cq_db(struct ocrdma_dev *dev, u16 cq_id, bool armed,
                       bool solicited, u16 cqe_popped)
{
        u32 val = cq_id & OCRDMA_DB_CQ_RING_ID_MASK;

        val |= ((cq_id & OCRDMA_DB_CQ_RING_ID_EXT_MASK) <<
             OCRDMA_DB_CQ_RING_ID_EXT_MASK_SHIFT);

        if (armed)
                val |= (1 << OCRDMA_DB_CQ_REARM_SHIFT);
        if (solicited)
                val |= (1 << OCRDMA_DB_CQ_SOLICIT_SHIFT);
        val |= (cqe_popped << OCRDMA_DB_CQ_NUM_POPPED_SHIFT);
        iowrite32(val, dev->nic_info.db + OCRDMA_DB_CQ_OFFSET);
}

static void ocrdma_ring_mq_db(struct ocrdma_dev *dev)
{
        u32 val = 0;

        val |= dev->mq.sq.id & OCRDMA_MQ_ID_MASK;
        val |= 1 << OCRDMA_MQ_NUM_MQE_SHIFT;
        iowrite32(val, dev->nic_info.db + OCRDMA_DB_MQ_OFFSET);
}

static void ocrdma_ring_eq_db(struct ocrdma_dev *dev, u16 eq_id,
                              bool arm, bool clear_int, u16 num_eqe)
{
        u32 val = 0;

        val |= eq_id & OCRDMA_EQ_ID_MASK;
        val |= ((eq_id & OCRDMA_EQ_ID_EXT_MASK) << OCRDMA_EQ_ID_EXT_MASK_SHIFT);
        if (arm)
                val |= (1 << OCRDMA_REARM_SHIFT);
        if (clear_int)
                val |= (1 << OCRDMA_EQ_CLR_SHIFT);
        val |= (1 << OCRDMA_EQ_TYPE_SHIFT);
        val |= (num_eqe << OCRDMA_NUM_EQE_SHIFT);
        iowrite32(val, dev->nic_info.db + OCRDMA_DB_EQ_OFFSET);
}

static void ocrdma_init_mch(struct ocrdma_mbx_hdr *cmd_hdr,
                            u8 opcode, u8 subsys, u32 cmd_len)
{
        cmd_hdr->subsys_op = (opcode | (subsys << OCRDMA_MCH_SUBSYS_SHIFT));
        cmd_hdr->timeout = 20; /* seconds */
        cmd_hdr->cmd_len = cmd_len - sizeof(struct ocrdma_mbx_hdr);
}

static void *ocrdma_init_emb_mqe(u8 opcode, u32 cmd_len)
{
        struct ocrdma_mqe *mqe;

        mqe = kzalloc(sizeof(struct ocrdma_mqe), GFP_KERNEL);
        if (!mqe)
                return NULL;
        mqe->hdr.spcl_sge_cnt_emb |=
                (OCRDMA_MQE_EMBEDDED << OCRDMA_MQE_HDR_EMB_SHIFT) &
                                        OCRDMA_MQE_HDR_EMB_MASK;
        mqe->hdr.pyld_len = cmd_len - sizeof(struct ocrdma_mqe_hdr);

        ocrdma_init_mch(&mqe->u.emb_req.mch, opcode, OCRDMA_SUBSYS_ROCE,
                        mqe->hdr.pyld_len);
        return mqe;
}

static void ocrdma_free_q(struct ocrdma_dev *dev, struct ocrdma_queue_info *q)
{
        dma_free_coherent(&dev->nic_info.pdev->dev, q->size, q->va, q->dma);
}

static int ocrdma_alloc_q(struct ocrdma_dev *dev,
                          struct ocrdma_queue_info *q, u16 len, u16 entry_size)
{
        memset(q, 0, sizeof(*q));
        q->len = len;
        q->entry_size = entry_size;
        q->size = len * entry_size;
        q->va = dma_alloc_coherent(&dev->nic_info.pdev->dev, q->size, &q->dma,
                                   GFP_KERNEL);
        if (!q->va)
                return -ENOMEM;
        return 0;
}

static void ocrdma_build_q_pages(struct ocrdma_pa *q_pa, int cnt,
                                        dma_addr_t host_pa, int hw_page_size)
{
        int i;

        for (i = 0; i < cnt; i++) {
                q_pa[i].lo = (u32) (host_pa & 0xffffffff);
                q_pa[i].hi = (u32) upper_32_bits(host_pa);
                host_pa += hw_page_size;
        }
}

static int ocrdma_mbx_delete_q(struct ocrdma_dev *dev,
                               struct ocrdma_queue_info *q, int queue_type)
{
        u8 opcode = 0;
        int status;
        struct ocrdma_delete_q_req *cmd = dev->mbx_cmd;

        switch (queue_type) {
        case QTYPE_MCCQ:
                opcode = OCRDMA_CMD_DELETE_MQ;
                break;
        case QTYPE_CQ:
                opcode = OCRDMA_CMD_DELETE_CQ;
                break;
        case QTYPE_EQ:
                opcode = OCRDMA_CMD_DELETE_EQ;
                break;
        default:
                BUG();
        }
        memset(cmd, 0, sizeof(*cmd));
        ocrdma_init_mch(&cmd->req, opcode, OCRDMA_SUBSYS_COMMON, sizeof(*cmd));
        cmd->id = q->id;

        status = be_roce_mcc_cmd(dev->nic_info.netdev,
                                 cmd, sizeof(*cmd), NULL, NULL);
        if (!status)
                q->created = false;
        return status;
}

static int ocrdma_mbx_create_eq(struct ocrdma_dev *dev, struct ocrdma_eq *eq)
{
        int status;
        struct ocrdma_create_eq_req *cmd = dev->mbx_cmd;
        struct ocrdma_create_eq_rsp *rsp = dev->mbx_cmd;

        memset(cmd, 0, sizeof(*cmd));
        ocrdma_init_mch(&cmd->req, OCRDMA_CMD_CREATE_EQ, OCRDMA_SUBSYS_COMMON,
                        sizeof(*cmd));

        cmd->req.rsvd_version = 2;
        cmd->num_pages = 4;
        cmd->valid = OCRDMA_CREATE_EQ_VALID;
        cmd->cnt = 4 << OCRDMA_CREATE_EQ_CNT_SHIFT;

        ocrdma_build_q_pages(&cmd->pa[0], cmd->num_pages, eq->q.dma,
                             PAGE_SIZE_4K);
        status = be_roce_mcc_cmd(dev->nic_info.netdev, cmd, sizeof(*cmd), NULL,
                                 NULL);
        if (!status) {
                eq->q.id = rsp->vector_eqid & 0xffff;
                eq->vector = (rsp->vector_eqid >> 16) & 0xffff;
                eq->q.created = true;
        }
        return status;
}

static int ocrdma_create_eq(struct ocrdma_dev *dev,
                            struct ocrdma_eq *eq, u16 q_len)
{
        int status;

        status = ocrdma_alloc_q(dev, &eq->q, OCRDMA_EQ_LEN,
                                sizeof(struct ocrdma_eqe));
        if (status)
                return status;

        status = ocrdma_mbx_create_eq(dev, eq);
        if (status)
                goto mbx_err;
        eq->dev = dev;
        ocrdma_ring_eq_db(dev, eq->q.id, true, true, 0);

        return 0;
mbx_err:
        ocrdma_free_q(dev, &eq->q);
        return status;
}

int ocrdma_get_irq(struct ocrdma_dev *dev, struct ocrdma_eq *eq)
{
        int irq;

        if (dev->nic_info.intr_mode == BE_INTERRUPT_MODE_INTX)
                irq = dev->nic_info.pdev->irq;
        else
                irq = dev->nic_info.msix.vector_list[eq->vector];
        return irq;
}

static void _ocrdma_destroy_eq(struct ocrdma_dev *dev, struct ocrdma_eq *eq)
{
        if (eq->q.created) {
                ocrdma_mbx_delete_q(dev, &eq->q, QTYPE_EQ);
                ocrdma_free_q(dev, &eq->q);
        }
}

static void ocrdma_destroy_eq(struct ocrdma_dev *dev, struct ocrdma_eq *eq)
{
        int irq;

        /* disarm EQ so that interrupts are not generated
         * during freeing and EQ delete is in progress.
         */
        ocrdma_ring_eq_db(dev, eq->q.id, false, false, 0);

        irq = ocrdma_get_irq(dev, eq);
        free_irq(irq, eq);
        _ocrdma_destroy_eq(dev, eq);
}

static void ocrdma_destroy_eqs(struct ocrdma_dev *dev)
{
        int i;

        for (i = 0; i < dev->eq_cnt; i++)
                ocrdma_destroy_eq(dev, &dev->eq_tbl[i]);
}

static int ocrdma_mbx_mq_cq_create(struct ocrdma_dev *dev,
                                   struct ocrdma_queue_info *cq,
                                   struct ocrdma_queue_info *eq)
{
        struct ocrdma_create_cq_cmd *cmd = dev->mbx_cmd;
        struct ocrdma_create_cq_cmd_rsp *rsp = dev->mbx_cmd;
        int status;

        memset(cmd, 0, sizeof(*cmd));
        ocrdma_init_mch(&cmd->req, OCRDMA_CMD_CREATE_CQ,
                        OCRDMA_SUBSYS_COMMON, sizeof(*cmd));

        cmd->req.rsvd_version = OCRDMA_CREATE_CQ_VER2;
        cmd->pgsz_pgcnt = (cq->size / OCRDMA_MIN_Q_PAGE_SIZE) <<
                OCRDMA_CREATE_CQ_PAGE_SIZE_SHIFT;
        cmd->pgsz_pgcnt |= PAGES_4K_SPANNED(cq->va, cq->size);

        cmd->ev_cnt_flags = OCRDMA_CREATE_CQ_DEF_FLAGS;
        cmd->eqn = eq->id;
        cmd->pdid_cqecnt = cq->size / sizeof(struct ocrdma_mcqe);

        ocrdma_build_q_pages(&cmd->pa[0], cq->size / OCRDMA_MIN_Q_PAGE_SIZE,
                             cq->dma, PAGE_SIZE_4K);
        status = be_roce_mcc_cmd(dev->nic_info.netdev,
                                 cmd, sizeof(*cmd), NULL, NULL);
        if (!status) {
                cq->id = (u16) (rsp->cq_id & OCRDMA_CREATE_CQ_RSP_CQ_ID_MASK);
                cq->created = true;
        }
        return status;
}

static u32 ocrdma_encoded_q_len(int q_len)
{
        u32 len_encoded = fls(q_len);   /* log2(len) + 1 */

        if (len_encoded == 16)
                len_encoded = 0;
        return len_encoded;
}

static int ocrdma_mbx_create_mq(struct ocrdma_dev *dev,
                                struct ocrdma_queue_info *mq,
                                struct ocrdma_queue_info *cq)
{
        int num_pages, status;
        struct ocrdma_create_mq_req *cmd = dev->mbx_cmd;
        struct ocrdma_create_mq_rsp *rsp = dev->mbx_cmd;
        struct ocrdma_pa *pa;

        memset(cmd, 0, sizeof(*cmd));
        num_pages = PAGES_4K_SPANNED(mq->va, mq->size);

        ocrdma_init_mch(&cmd->req, OCRDMA_CMD_CREATE_MQ_EXT,
                        OCRDMA_SUBSYS_COMMON, sizeof(*cmd));
        cmd->req.rsvd_version = 1;
        cmd->cqid_pages = num_pages;
        cmd->cqid_pages |= (cq->id << OCRDMA_CREATE_MQ_CQ_ID_SHIFT);
        cmd->async_cqid_valid = OCRDMA_CREATE_MQ_ASYNC_CQ_VALID;

        cmd->async_event_bitmap = BIT(OCRDMA_ASYNC_GRP5_EVE_CODE);
        cmd->async_event_bitmap |= BIT(OCRDMA_ASYNC_RDMA_EVE_CODE);
        /* Request link events on this  MQ. */
        cmd->async_event_bitmap |= BIT(OCRDMA_ASYNC_LINK_EVE_CODE);

        cmd->async_cqid_ringsize = cq->id;
        cmd->async_cqid_ringsize |= (ocrdma_encoded_q_len(mq->len) <<
                                OCRDMA_CREATE_MQ_RING_SIZE_SHIFT);
        cmd->valid = OCRDMA_CREATE_MQ_VALID;
        pa = &cmd->pa[0];

        ocrdma_build_q_pages(pa, num_pages, mq->dma, PAGE_SIZE_4K);
        status = be_roce_mcc_cmd(dev->nic_info.netdev,
                                 cmd, sizeof(*cmd), NULL, NULL);
        if (!status) {
                mq->id = rsp->id;
                mq->created = true;
        }
        return status;
}

static int ocrdma_create_mq(struct ocrdma_dev *dev)
{
        int status;

        /* Alloc completion queue for Mailbox queue */
        status = ocrdma_alloc_q(dev, &dev->mq.cq, OCRDMA_MQ_CQ_LEN,
                                sizeof(struct ocrdma_mcqe));
        if (status)
                goto alloc_err;

        dev->eq_tbl[0].cq_cnt++;
        status = ocrdma_mbx_mq_cq_create(dev, &dev->mq.cq, &dev->eq_tbl[0].q);
        if (status)
                goto mbx_cq_free;

        memset(&dev->mqe_ctx, 0, sizeof(dev->mqe_ctx));
        init_waitqueue_head(&dev->mqe_ctx.cmd_wait);
        mutex_init(&dev->mqe_ctx.lock);

        /* Alloc Mailbox queue */
        status = ocrdma_alloc_q(dev, &dev->mq.sq, OCRDMA_MQ_LEN,
                                sizeof(struct ocrdma_mqe));
        if (status)
                goto mbx_cq_destroy;
        status = ocrdma_mbx_create_mq(dev, &dev->mq.sq, &dev->mq.cq);
        if (status)
                goto mbx_q_free;
        ocrdma_ring_cq_db(dev, dev->mq.cq.id, true, false, 0);
        return 0;

mbx_q_free:
        ocrdma_free_q(dev, &dev->mq.sq);
mbx_cq_destroy:
        ocrdma_mbx_delete_q(dev, &dev->mq.cq, QTYPE_CQ);
mbx_cq_free:
        ocrdma_free_q(dev, &dev->mq.cq);
alloc_err:
        return status;
}

static void ocrdma_destroy_mq(struct ocrdma_dev *dev)
{
        struct ocrdma_queue_info *mbxq, *cq;

        /* mqe_ctx lock synchronizes with any other pending cmds. */
        mutex_lock(&dev->mqe_ctx.lock);
        mbxq = &dev->mq.sq;
        if (mbxq->created) {
                ocrdma_mbx_delete_q(dev, mbxq, QTYPE_MCCQ);
                ocrdma_free_q(dev, mbxq);
        }
        mutex_unlock(&dev->mqe_ctx.lock);

        cq = &dev->mq.cq;
        if (cq->created) {
                ocrdma_mbx_delete_q(dev, cq, QTYPE_CQ);
                ocrdma_free_q(dev, cq);
        }
}

static void ocrdma_process_qpcat_error(struct ocrdma_dev *dev,
                                       struct ocrdma_qp *qp)
{
        enum ib_qp_state new_ib_qps = IB_QPS_ERR;
        enum ib_qp_state old_ib_qps;

        if (qp == NULL)
                BUG();
        ocrdma_qp_state_change(qp, new_ib_qps, &old_ib_qps);
}

static void ocrdma_dispatch_ibevent(struct ocrdma_dev *dev,
                                    struct ocrdma_ae_mcqe *cqe)
{
        struct ocrdma_qp *qp = NULL;
        struct ocrdma_cq *cq = NULL;
        struct ib_event ib_evt;
        int cq_event = 0;
        int qp_event = 1;
        int srq_event = 0;
        int dev_event = 0;
        int type = (cqe->valid_ae_event & OCRDMA_AE_MCQE_EVENT_TYPE_MASK) >>
            OCRDMA_AE_MCQE_EVENT_TYPE_SHIFT;
        u16 qpid = cqe->qpvalid_qpid & OCRDMA_AE_MCQE_QPID_MASK;
        u16 cqid = cqe->cqvalid_cqid & OCRDMA_AE_MCQE_CQID_MASK;

        /*
         * Some FW version returns wrong qp or cq ids in CQEs.
         * Checking whether the IDs are valid
         */

        if (cqe->qpvalid_qpid & OCRDMA_AE_MCQE_QPVALID) {
                if (qpid < dev->attr.max_qp)
                        qp = dev->qp_tbl[qpid];
                if (qp == NULL) {
                        pr_err("ocrdma%d:Async event - qpid %u is not valid\n",
                               dev->id, qpid);
                        return;
                }
        }

        if (cqe->cqvalid_cqid & OCRDMA_AE_MCQE_CQVALID) {
                if (cqid < dev->attr.max_cq)
                        cq = dev->cq_tbl[cqid];
                if (cq == NULL) {
                        pr_err("ocrdma%d:Async event - cqid %u is not valid\n",
                               dev->id, cqid);
                        return;
                }
        }

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

        ib_evt.device = &dev->ibdev;

        switch (type) {
        case OCRDMA_CQ_ERROR:
                ib_evt.element.cq = &cq->ibcq;
                ib_evt.event = IB_EVENT_CQ_ERR;
                cq_event = 1;
                qp_event = 0;
                break;
        case OCRDMA_CQ_OVERRUN_ERROR:
                ib_evt.element.cq = &cq->ibcq;
                ib_evt.event = IB_EVENT_CQ_ERR;
                cq_event = 1;
                qp_event = 0;
                break;
        case OCRDMA_CQ_QPCAT_ERROR:
                ib_evt.element.qp = &qp->ibqp;
                ib_evt.event = IB_EVENT_QP_FATAL;
                ocrdma_process_qpcat_error(dev, qp);
                break;
        case OCRDMA_QP_ACCESS_ERROR:
                ib_evt.element.qp = &qp->ibqp;
                ib_evt.event = IB_EVENT_QP_ACCESS_ERR;
                break;
        case OCRDMA_QP_COMM_EST_EVENT:
                ib_evt.element.qp = &qp->ibqp;
                ib_evt.event = IB_EVENT_COMM_EST;
                break;
        case OCRDMA_SQ_DRAINED_EVENT:
                ib_evt.element.qp = &qp->ibqp;
                ib_evt.event = IB_EVENT_SQ_DRAINED;
                break;
        case OCRDMA_DEVICE_FATAL_EVENT:
                ib_evt.element.port_num = 1;
                ib_evt.event = IB_EVENT_DEVICE_FATAL;
                qp_event = 0;
                dev_event = 1;
                break;
        case OCRDMA_SRQCAT_ERROR:
                ib_evt.element.srq = &qp->srq->ibsrq;
                ib_evt.event = IB_EVENT_SRQ_ERR;
                srq_event = 1;
                qp_event = 0;
                break;
        case OCRDMA_SRQ_LIMIT_EVENT:
                ib_evt.element.srq = &qp->srq->ibsrq;
                ib_evt.event = IB_EVENT_SRQ_LIMIT_REACHED;
                srq_event = 1;
                qp_event = 0;
                break;
        case OCRDMA_QP_LAST_WQE_EVENT:
                ib_evt.element.qp = &qp->ibqp;
                ib_evt.event = IB_EVENT_QP_LAST_WQE_REACHED;
                break;
        default:
                cq_event = 0;
                qp_event = 0;
                srq_event = 0;
                dev_event = 0;
                pr_err("%s() unknown type=0x%x\n", __func__, type);
                break;
        }

        if (type < OCRDMA_MAX_ASYNC_ERRORS)
                atomic_inc(&dev->async_err_stats[type]);

        if (qp_event) {
                if (qp->ibqp.event_handler)
                        qp->ibqp.event_handler(&ib_evt, qp->ibqp.qp_context);
        } else if (cq_event) {
                if (cq->ibcq.event_handler)
                        cq->ibcq.event_handler(&ib_evt, cq->ibcq.cq_context);
        } else if (srq_event) {
                if (qp->srq->ibsrq.event_handler)
                        qp->srq->ibsrq.event_handler(&ib_evt,
                                                     qp->srq->ibsrq.
                                                     srq_context);
        } else if (dev_event) {
                dev_err(&dev->ibdev.dev, "Fatal event received\n");
                ib_dispatch_event(&ib_evt);
        }

}

static void ocrdma_process_grp5_aync(struct ocrdma_dev *dev,
                                        struct ocrdma_ae_mcqe *cqe)
{
        struct ocrdma_ae_pvid_mcqe *evt;
        int type = (cqe->valid_ae_event & OCRDMA_AE_MCQE_EVENT_TYPE_MASK) >>
                        OCRDMA_AE_MCQE_EVENT_TYPE_SHIFT;

        switch (type) {
        case OCRDMA_ASYNC_EVENT_PVID_STATE:
                evt = (struct ocrdma_ae_pvid_mcqe *)cqe;
                if ((evt->tag_enabled & OCRDMA_AE_PVID_MCQE_ENABLED_MASK) >>
                        OCRDMA_AE_PVID_MCQE_ENABLED_SHIFT)
                        dev->pvid = ((evt->tag_enabled &
                                        OCRDMA_AE_PVID_MCQE_TAG_MASK) >>
                                        OCRDMA_AE_PVID_MCQE_TAG_SHIFT);
                break;

        case OCRDMA_ASYNC_EVENT_COS_VALUE:
                atomic_set(&dev->update_sl, 1);
                break;
        default:
                /* Not interested evts. */
                break;
        }
}

static void ocrdma_process_link_state(struct ocrdma_dev *dev,
                                      struct ocrdma_ae_mcqe *cqe)
{
        struct ocrdma_ae_lnkst_mcqe *evt;
        u8 lstate;

        evt = (struct ocrdma_ae_lnkst_mcqe *)cqe;
        lstate = ocrdma_get_ae_link_state(evt->speed_state_ptn);

        if (!(lstate & OCRDMA_AE_LSC_LLINK_MASK))
                return;

        if (dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)
                ocrdma_update_link_state(dev, (lstate & OCRDMA_LINK_ST_MASK));
}

static void ocrdma_process_acqe(struct ocrdma_dev *dev, void *ae_cqe)
{
        /* async CQE processing */
        struct ocrdma_ae_mcqe *cqe = ae_cqe;
        u32 evt_code = (cqe->valid_ae_event & OCRDMA_AE_MCQE_EVENT_CODE_MASK) >>
                        OCRDMA_AE_MCQE_EVENT_CODE_SHIFT;
        switch (evt_code) {
        case OCRDMA_ASYNC_LINK_EVE_CODE:
                ocrdma_process_link_state(dev, cqe);
                break;
        case OCRDMA_ASYNC_RDMA_EVE_CODE:
                ocrdma_dispatch_ibevent(dev, cqe);
                break;
        case OCRDMA_ASYNC_GRP5_EVE_CODE:
                ocrdma_process_grp5_aync(dev, cqe);
                break;
        default:
                pr_err("%s(%d) invalid evt code=0x%x\n", __func__,
                       dev->id, evt_code);
        }
}

static void ocrdma_process_mcqe(struct ocrdma_dev *dev, struct ocrdma_mcqe *cqe)
{
        if (dev->mqe_ctx.tag == cqe->tag_lo && dev->mqe_ctx.cmd_done == false) {
                dev->mqe_ctx.cqe_status = (cqe->status &
                     OCRDMA_MCQE_STATUS_MASK) >> OCRDMA_MCQE_STATUS_SHIFT;
                dev->mqe_ctx.ext_status =
                    (cqe->status & OCRDMA_MCQE_ESTATUS_MASK)
                    >> OCRDMA_MCQE_ESTATUS_SHIFT;
                dev->mqe_ctx.cmd_done = true;
                wake_up(&dev->mqe_ctx.cmd_wait);
        } else
                pr_err("%s() cqe for invalid tag0x%x.expected=0x%x\n",
                       __func__, cqe->tag_lo, dev->mqe_ctx.tag);
}

static int ocrdma_mq_cq_handler(struct ocrdma_dev *dev, u16 cq_id)
{
        u16 cqe_popped = 0;
        struct ocrdma_mcqe *cqe;

        while (1) {
                cqe = ocrdma_get_mcqe(dev);
                if (cqe == NULL)
                        break;
                ocrdma_le32_to_cpu(cqe, sizeof(*cqe));
                cqe_popped += 1;
                if (cqe->valid_ae_cmpl_cons & OCRDMA_MCQE_AE_MASK)
                        ocrdma_process_acqe(dev, cqe);
                else if (cqe->valid_ae_cmpl_cons & OCRDMA_MCQE_CMPL_MASK)
                        ocrdma_process_mcqe(dev, cqe);
                memset(cqe, 0, sizeof(struct ocrdma_mcqe));
                ocrdma_mcq_inc_tail(dev);
        }
        ocrdma_ring_cq_db(dev, dev->mq.cq.id, true, false, cqe_popped);
        return 0;
}

static struct ocrdma_cq *_ocrdma_qp_buddy_cq_handler(struct ocrdma_dev *dev,
                                struct ocrdma_cq *cq, bool sq)
{
        struct ocrdma_qp *qp;
        struct list_head *cur;
        struct ocrdma_cq *bcq = NULL;
        struct list_head *head = sq?(&cq->sq_head):(&cq->rq_head);

        list_for_each(cur, head) {
                if (sq)
                        qp = list_entry(cur, struct ocrdma_qp, sq_entry);
                else
                        qp = list_entry(cur, struct ocrdma_qp, rq_entry);

                if (qp->srq)
                        continue;
                /* if wq and rq share the same cq, than comp_handler
                 * is already invoked.
                 */
                if (qp->sq_cq == qp->rq_cq)
                        continue;
                /* if completion came on sq, rq's cq is buddy cq.
                 * if completion came on rq, sq's cq is buddy cq.
                 */
                if (qp->sq_cq == cq)
                        bcq = qp->rq_cq;
                else
                        bcq = qp->sq_cq;
                return bcq;
        }
        return NULL;
}

static void ocrdma_qp_buddy_cq_handler(struct ocrdma_dev *dev,
                                       struct ocrdma_cq *cq)
{
        unsigned long flags;
        struct ocrdma_cq *bcq = NULL;

        /* Go through list of QPs in error state which are using this CQ
         * and invoke its callback handler to trigger CQE processing for
         * error/flushed CQE. It is rare to find more than few entries in
         * this list as most consumers stops after getting error CQE.
         * List is traversed only once when a matching buddy cq found for a QP.
         */
        spin_lock_irqsave(&dev->flush_q_lock, flags);
        /* Check if buddy CQ is present.
         * true - Check for  SQ CQ
         * false - Check for RQ CQ
         */
        bcq = _ocrdma_qp_buddy_cq_handler(dev, cq, true);
        if (bcq == NULL)
                bcq = _ocrdma_qp_buddy_cq_handler(dev, cq, false);
        spin_unlock_irqrestore(&dev->flush_q_lock, flags);

        /* if there is valid buddy cq, look for its completion handler */
        if (bcq && bcq->ibcq.comp_handler) {
                spin_lock_irqsave(&bcq->comp_handler_lock, flags);
                (*bcq->ibcq.comp_handler) (&bcq->ibcq, bcq->ibcq.cq_context);
                spin_unlock_irqrestore(&bcq->comp_handler_lock, flags);
        }
}

static void ocrdma_qp_cq_handler(struct ocrdma_dev *dev, u16 cq_idx)
{
        unsigned long flags;
        struct ocrdma_cq *cq;

        if (cq_idx >= OCRDMA_MAX_CQ)
                BUG();

        cq = dev->cq_tbl[cq_idx];
        if (cq == NULL)
                return;

        if (cq->ibcq.comp_handler) {
                spin_lock_irqsave(&cq->comp_handler_lock, flags);
                (*cq->ibcq.comp_handler) (&cq->ibcq, cq->ibcq.cq_context);
                spin_unlock_irqrestore(&cq->comp_handler_lock, flags);
        }
        ocrdma_qp_buddy_cq_handler(dev, cq);
}

static void ocrdma_cq_handler(struct ocrdma_dev *dev, u16 cq_id)
{
        /* process the MQ-CQE. */
        if (cq_id == dev->mq.cq.id)
                ocrdma_mq_cq_handler(dev, cq_id);
        else
                ocrdma_qp_cq_handler(dev, cq_id);
}

static irqreturn_t ocrdma_irq_handler(int irq, void *handle)
{
        struct ocrdma_eq *eq = handle;
        struct ocrdma_dev *dev = eq->dev;
        struct ocrdma_eqe eqe;
        struct ocrdma_eqe *ptr;
        u16 cq_id;

        u8 mcode;
        int budget = eq->cq_cnt;

        do {
                ptr = ocrdma_get_eqe(eq);
                eqe = *ptr;
                ocrdma_le32_to_cpu(&eqe, sizeof(eqe));
                mcode = (eqe.id_valid & OCRDMA_EQE_MAJOR_CODE_MASK)
                                >> OCRDMA_EQE_MAJOR_CODE_SHIFT;
                if (mcode == OCRDMA_MAJOR_CODE_SENTINAL)
                        pr_err("EQ full on eqid = 0x%x, eqe = 0x%x\n",
                               eq->q.id, eqe.id_valid);
                if ((eqe.id_valid & OCRDMA_EQE_VALID_MASK) == 0)
                        break;

                ptr->id_valid = 0;
                /* ring eq doorbell as soon as its consumed. */
                ocrdma_ring_eq_db(dev, eq->q.id, false, true, 1);
                /* check whether its CQE or not. */
                if ((eqe.id_valid & OCRDMA_EQE_FOR_CQE_MASK) == 0) {
                        cq_id = eqe.id_valid >> OCRDMA_EQE_RESOURCE_ID_SHIFT;
                        ocrdma_cq_handler(dev, cq_id);
                }
                ocrdma_eq_inc_tail(eq);

                /* There can be a stale EQE after the last bound CQ is
                 * destroyed. EQE valid and budget == 0 implies this.
                 */
                if (budget)
                        budget--;

        } while (budget);

        eq->aic_obj.eq_intr_cnt++;
        ocrdma_ring_eq_db(dev, eq->q.id, true, true, 0);
        return IRQ_HANDLED;
}

static void ocrdma_post_mqe(struct ocrdma_dev *dev, struct ocrdma_mqe *cmd)
{
        struct ocrdma_mqe *mqe;

        dev->mqe_ctx.tag = dev->mq.sq.head;
        dev->mqe_ctx.cmd_done = false;
        mqe = ocrdma_get_mqe(dev);
        cmd->hdr.tag_lo = dev->mq.sq.head;
        ocrdma_copy_cpu_to_le32(mqe, cmd, sizeof(*mqe));
        /* make sure descriptor is written before ringing doorbell */
        wmb();
        ocrdma_mq_inc_head(dev);
        ocrdma_ring_mq_db(dev);
}

static int ocrdma_wait_mqe_cmpl(struct ocrdma_dev *dev)
{
        long status;
        /* 30 sec timeout */
        status = wait_event_timeout(dev->mqe_ctx.cmd_wait,
                                    (dev->mqe_ctx.cmd_done != false),
                                    msecs_to_jiffies(30000));
        if (status)
                return 0;
        else {
                dev->mqe_ctx.fw_error_state = true;
                pr_err("%s(%d) mailbox timeout: fw not responding\n",
                       __func__, dev->id);
                return -1;
        }
}

/* issue a mailbox command on the MQ */
static int ocrdma_mbx_cmd(struct ocrdma_dev *dev, struct ocrdma_mqe *mqe)
{
        int status = 0;
        u16 cqe_status, ext_status;
        struct ocrdma_mqe *rsp_mqe;
        struct ocrdma_mbx_rsp *rsp = NULL;

        mutex_lock(&dev->mqe_ctx.lock);
        if (dev->mqe_ctx.fw_error_state)
                goto mbx_err;
        ocrdma_post_mqe(dev, mqe);
        status = ocrdma_wait_mqe_cmpl(dev);
        if (status)
                goto mbx_err;
        cqe_status = dev->mqe_ctx.cqe_status;
        ext_status = dev->mqe_ctx.ext_status;
        rsp_mqe = ocrdma_get_mqe_rsp(dev);
        ocrdma_copy_le32_to_cpu(mqe, rsp_mqe, (sizeof(*mqe)));
        if ((mqe->hdr.spcl_sge_cnt_emb & OCRDMA_MQE_HDR_EMB_MASK) >>
                                OCRDMA_MQE_HDR_EMB_SHIFT)
                rsp = &mqe->u.rsp;

        if (cqe_status || ext_status) {
                pr_err("%s() cqe_status=0x%x, ext_status=0x%x,\n",
                       __func__, cqe_status, ext_status);
                if (rsp) {
                        /* This is for embedded cmds. */
                        pr_err("opcode=0x%x, subsystem=0x%x\n",
                               (rsp->subsys_op & OCRDMA_MBX_RSP_OPCODE_MASK) >>
                                OCRDMA_MBX_RSP_OPCODE_SHIFT,
                                (rsp->subsys_op & OCRDMA_MBX_RSP_SUBSYS_MASK) >>
                                OCRDMA_MBX_RSP_SUBSYS_SHIFT);
                }
                status = ocrdma_get_mbx_cqe_errno(cqe_status);
                goto mbx_err;
        }
        /* For non embedded, rsp errors are handled in ocrdma_nonemb_mbx_cmd */
        if (rsp && (mqe->u.rsp.status & OCRDMA_MBX_RSP_STATUS_MASK))
                status = ocrdma_get_mbx_errno(mqe->u.rsp.status);
mbx_err:
        mutex_unlock(&dev->mqe_ctx.lock);
        return status;
}

static int ocrdma_nonemb_mbx_cmd(struct ocrdma_dev *dev, struct ocrdma_mqe *mqe,
                                 void *payload_va)
{
        int status;
        struct ocrdma_mbx_rsp *rsp = payload_va;

        if ((mqe->hdr.spcl_sge_cnt_emb & OCRDMA_MQE_HDR_EMB_MASK) >>
                                OCRDMA_MQE_HDR_EMB_SHIFT)
                BUG();

        status = ocrdma_mbx_cmd(dev, mqe);
        if (!status)
                /* For non embedded, only CQE failures are handled in
                 * ocrdma_mbx_cmd. We need to check for RSP errors.
                 */
                if (rsp->status & OCRDMA_MBX_RSP_STATUS_MASK)
                        status = ocrdma_get_mbx_errno(rsp->status);

        if (status)
                pr_err("opcode=0x%x, subsystem=0x%x\n",
                       (rsp->subsys_op & OCRDMA_MBX_RSP_OPCODE_MASK) >>
                        OCRDMA_MBX_RSP_OPCODE_SHIFT,
                        (rsp->subsys_op & OCRDMA_MBX_RSP_SUBSYS_MASK) >>
                        OCRDMA_MBX_RSP_SUBSYS_SHIFT);
        return status;
}

static void ocrdma_get_attr(struct ocrdma_dev *dev,
                              struct ocrdma_dev_attr *attr,
                              struct ocrdma_mbx_query_config *rsp)
{
        attr->max_pd =
            (rsp->max_pd_ca_ack_delay & OCRDMA_MBX_QUERY_CFG_MAX_PD_MASK) >>
            OCRDMA_MBX_QUERY_CFG_MAX_PD_SHIFT;
        attr->udp_encap = (rsp->max_pd_ca_ack_delay &
                           OCRDMA_MBX_QUERY_CFG_L3_TYPE_MASK) >>
                           OCRDMA_MBX_QUERY_CFG_L3_TYPE_SHIFT;
        attr->max_dpp_pds =
           (rsp->max_dpp_pds_credits & OCRDMA_MBX_QUERY_CFG_MAX_DPP_PDS_MASK) >>
            OCRDMA_MBX_QUERY_CFG_MAX_DPP_PDS_OFFSET;
        attr->max_qp =
            (rsp->qp_srq_cq_ird_ord & OCRDMA_MBX_QUERY_CFG_MAX_QP_MASK) >>
            OCRDMA_MBX_QUERY_CFG_MAX_QP_SHIFT;
        attr->max_srq =
                (rsp->max_srq_rpir_qps & OCRDMA_MBX_QUERY_CFG_MAX_SRQ_MASK) >>
                OCRDMA_MBX_QUERY_CFG_MAX_SRQ_OFFSET;
        attr->max_send_sge = ((rsp->max_recv_send_sge &
                               OCRDMA_MBX_QUERY_CFG_MAX_SEND_SGE_MASK) >>
                              OCRDMA_MBX_QUERY_CFG_MAX_SEND_SGE_SHIFT);
        attr->max_recv_sge = (rsp->max_recv_send_sge &
                              OCRDMA_MBX_QUERY_CFG_MAX_RECV_SGE_MASK) >>
            OCRDMA_MBX_QUERY_CFG_MAX_RECV_SGE_SHIFT;
        attr->max_srq_sge = (rsp->max_srq_rqe_sge &
                              OCRDMA_MBX_QUERY_CFG_MAX_SRQ_SGE_MASK) >>
            OCRDMA_MBX_QUERY_CFG_MAX_SRQ_SGE_OFFSET;
        attr->max_rdma_sge = (rsp->max_wr_rd_sge &
                              OCRDMA_MBX_QUERY_CFG_MAX_RD_SGE_MASK) >>
            OCRDMA_MBX_QUERY_CFG_MAX_RD_SGE_SHIFT;
        attr->max_ord_per_qp = (rsp->max_ird_ord_per_qp &
                                OCRDMA_MBX_QUERY_CFG_MAX_ORD_PER_QP_MASK) >>
            OCRDMA_MBX_QUERY_CFG_MAX_ORD_PER_QP_SHIFT;
        attr->max_ird_per_qp = (rsp->max_ird_ord_per_qp &
                                OCRDMA_MBX_QUERY_CFG_MAX_IRD_PER_QP_MASK) >>
            OCRDMA_MBX_QUERY_CFG_MAX_IRD_PER_QP_SHIFT;
        attr->cq_overflow_detect = (rsp->qp_srq_cq_ird_ord &
                                    OCRDMA_MBX_QUERY_CFG_CQ_OVERFLOW_MASK) >>
            OCRDMA_MBX_QUERY_CFG_CQ_OVERFLOW_SHIFT;
        attr->srq_supported = (rsp->qp_srq_cq_ird_ord &
                               OCRDMA_MBX_QUERY_CFG_SRQ_SUPPORTED_MASK) >>
            OCRDMA_MBX_QUERY_CFG_SRQ_SUPPORTED_SHIFT;
        attr->local_ca_ack_delay = (rsp->max_pd_ca_ack_delay &
                                    OCRDMA_MBX_QUERY_CFG_CA_ACK_DELAY_MASK) >>
            OCRDMA_MBX_QUERY_CFG_CA_ACK_DELAY_SHIFT;
        attr->max_mw = rsp->max_mw;
        attr->max_mr = rsp->max_mr;
        attr->max_mr_size = ((u64)rsp->max_mr_size_hi << 32) |
                              rsp->max_mr_size_lo;
        attr->max_fmr = 0;
        attr->max_pages_per_frmr = rsp->max_pages_per_frmr;
        attr->max_num_mr_pbl = rsp->max_num_mr_pbl;
        attr->max_cqe = rsp->max_cq_cqes_per_cq &
                        OCRDMA_MBX_QUERY_CFG_MAX_CQES_PER_CQ_MASK;
        attr->max_cq = (rsp->max_cq_cqes_per_cq &
                        OCRDMA_MBX_QUERY_CFG_MAX_CQ_MASK) >>
                        OCRDMA_MBX_QUERY_CFG_MAX_CQ_OFFSET;
        attr->wqe_size = ((rsp->wqe_rqe_stride_max_dpp_cqs &
                OCRDMA_MBX_QUERY_CFG_MAX_WQE_SIZE_MASK) >>
                OCRDMA_MBX_QUERY_CFG_MAX_WQE_SIZE_OFFSET) *
                OCRDMA_WQE_STRIDE;
        attr->rqe_size = ((rsp->wqe_rqe_stride_max_dpp_cqs &
                OCRDMA_MBX_QUERY_CFG_MAX_RQE_SIZE_MASK) >>
                OCRDMA_MBX_QUERY_CFG_MAX_RQE_SIZE_OFFSET) *
                OCRDMA_WQE_STRIDE;
        attr->max_inline_data =
            attr->wqe_size - (sizeof(struct ocrdma_hdr_wqe) +
                              sizeof(struct ocrdma_sge));
        if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
                attr->ird = 1;
                attr->ird_page_size = OCRDMA_MIN_Q_PAGE_SIZE;
                attr->num_ird_pages = MAX_OCRDMA_IRD_PAGES;
        }
        dev->attr.max_wqe = rsp->max_wqes_rqes_per_q >>
                 OCRDMA_MBX_QUERY_CFG_MAX_WQES_PER_WQ_OFFSET;
        dev->attr.max_rqe = rsp->max_wqes_rqes_per_q &
                OCRDMA_MBX_QUERY_CFG_MAX_RQES_PER_RQ_MASK;
}

static int ocrdma_check_fw_config(struct ocrdma_dev *dev,
                                   struct ocrdma_fw_conf_rsp *conf)
{
        u32 fn_mode;

        fn_mode = conf->fn_mode & OCRDMA_FN_MODE_RDMA;
        if (fn_mode != OCRDMA_FN_MODE_RDMA)
                return -EINVAL;
        dev->base_eqid = conf->base_eqid;
        dev->max_eq = conf->max_eq;
        return 0;
}

/* can be issued only during init time. */
static int ocrdma_mbx_query_fw_ver(struct ocrdma_dev *dev)
{
        int status = -ENOMEM;
        struct ocrdma_mqe *cmd;
        struct ocrdma_fw_ver_rsp *rsp;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_GET_FW_VER, sizeof(*cmd));
        if (!cmd)
                return -ENOMEM;
        ocrdma_init_mch((struct ocrdma_mbx_hdr *)&cmd->u.cmd[0],
                        OCRDMA_CMD_GET_FW_VER,
                        OCRDMA_SUBSYS_COMMON, sizeof(*cmd));

        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_fw_ver_rsp *)cmd;
        memset(&dev->attr.fw_ver[0], 0, sizeof(dev->attr.fw_ver));
        memcpy(&dev->attr.fw_ver[0], &rsp->running_ver[0],
               sizeof(rsp->running_ver));
        ocrdma_le32_to_cpu(dev->attr.fw_ver, sizeof(rsp->running_ver));
mbx_err:
        kfree(cmd);
        return status;
}

/* can be issued only during init time. */
static int ocrdma_mbx_query_fw_config(struct ocrdma_dev *dev)
{
        int status = -ENOMEM;
        struct ocrdma_mqe *cmd;
        struct ocrdma_fw_conf_rsp *rsp;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_GET_FW_CONFIG, sizeof(*cmd));
        if (!cmd)
                return -ENOMEM;
        ocrdma_init_mch((struct ocrdma_mbx_hdr *)&cmd->u.cmd[0],
                        OCRDMA_CMD_GET_FW_CONFIG,
                        OCRDMA_SUBSYS_COMMON, sizeof(*cmd));
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_fw_conf_rsp *)cmd;
        status = ocrdma_check_fw_config(dev, rsp);
mbx_err:
        kfree(cmd);
        return status;
}

int ocrdma_mbx_rdma_stats(struct ocrdma_dev *dev, bool reset)
{
        struct ocrdma_rdma_stats_req *req = dev->stats_mem.va;
        struct ocrdma_mqe *mqe = &dev->stats_mem.mqe;
        struct ocrdma_rdma_stats_resp *old_stats;
        int status;

        old_stats = kmalloc(sizeof(*old_stats), GFP_KERNEL);
        if (old_stats == NULL)
                return -ENOMEM;

        memset(mqe, 0, sizeof(*mqe));
        mqe->hdr.pyld_len = dev->stats_mem.size;
        mqe->hdr.spcl_sge_cnt_emb |=
                        (1 << OCRDMA_MQE_HDR_SGE_CNT_SHIFT) &
                                OCRDMA_MQE_HDR_SGE_CNT_MASK;
        mqe->u.nonemb_req.sge[0].pa_lo = (u32) (dev->stats_mem.pa & 0xffffffff);
        mqe->u.nonemb_req.sge[0].pa_hi = (u32) upper_32_bits(dev->stats_mem.pa);
        mqe->u.nonemb_req.sge[0].len = dev->stats_mem.size;

        /* Cache the old stats */
        memcpy(old_stats, req, sizeof(struct ocrdma_rdma_stats_resp));
        memset(req, 0, dev->stats_mem.size);

        ocrdma_init_mch((struct ocrdma_mbx_hdr *)req,
                        OCRDMA_CMD_GET_RDMA_STATS,
                        OCRDMA_SUBSYS_ROCE,
                        dev->stats_mem.size);
        if (reset)
                req->reset_stats = reset;

        status = ocrdma_nonemb_mbx_cmd(dev, mqe, dev->stats_mem.va);
        if (status)
                /* Copy from cache, if mbox fails */
                memcpy(req, old_stats, sizeof(struct ocrdma_rdma_stats_resp));
        else
                ocrdma_le32_to_cpu(req, dev->stats_mem.size);

        kfree(old_stats);
        return status;
}

static int ocrdma_mbx_get_ctrl_attribs(struct ocrdma_dev *dev)
{
        int status = -ENOMEM;
        struct ocrdma_dma_mem dma;
        struct ocrdma_mqe *mqe;
        struct ocrdma_get_ctrl_attribs_rsp *ctrl_attr_rsp;
        struct mgmt_hba_attribs *hba_attribs;

        mqe = kzalloc(sizeof(struct ocrdma_mqe), GFP_KERNEL);
        if (!mqe)
                return status;

        dma.size = sizeof(struct ocrdma_get_ctrl_attribs_rsp);
        dma.va   = dma_alloc_coherent(&dev->nic_info.pdev->dev,
                                        dma.size, &dma.pa, GFP_KERNEL);
        if (!dma.va)
                goto free_mqe;

        mqe->hdr.pyld_len = dma.size;
        mqe->hdr.spcl_sge_cnt_emb |=
                        (1 << OCRDMA_MQE_HDR_SGE_CNT_SHIFT) &
                        OCRDMA_MQE_HDR_SGE_CNT_MASK;
        mqe->u.nonemb_req.sge[0].pa_lo = (u32) (dma.pa & 0xffffffff);
        mqe->u.nonemb_req.sge[0].pa_hi = (u32) upper_32_bits(dma.pa);
        mqe->u.nonemb_req.sge[0].len = dma.size;

        ocrdma_init_mch((struct ocrdma_mbx_hdr *)dma.va,
                        OCRDMA_CMD_GET_CTRL_ATTRIBUTES,
                        OCRDMA_SUBSYS_COMMON,
                        dma.size);

        status = ocrdma_nonemb_mbx_cmd(dev, mqe, dma.va);
        if (!status) {
                ctrl_attr_rsp = (struct ocrdma_get_ctrl_attribs_rsp *)dma.va;
                hba_attribs = &ctrl_attr_rsp->ctrl_attribs.hba_attribs;

                dev->hba_port_num = (hba_attribs->ptpnum_maxdoms_hbast_cv &
                                        OCRDMA_HBA_ATTRB_PTNUM_MASK)
                                        >> OCRDMA_HBA_ATTRB_PTNUM_SHIFT;
                strlcpy(dev->model_number,
                        hba_attribs->controller_model_number,
                        sizeof(dev->model_number));
        }
        dma_free_coherent(&dev->nic_info.pdev->dev, dma.size, dma.va, dma.pa);
free_mqe:
        kfree(mqe);
        return status;
}

static int ocrdma_mbx_query_dev(struct ocrdma_dev *dev)
{
        int status = -ENOMEM;
        struct ocrdma_mbx_query_config *rsp;
        struct ocrdma_mqe *cmd;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_QUERY_CONFIG, sizeof(*cmd));
        if (!cmd)
                return status;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_mbx_query_config *)cmd;
        ocrdma_get_attr(dev, &dev->attr, rsp);
mbx_err:
        kfree(cmd);
        return status;
}

int ocrdma_mbx_get_link_speed(struct ocrdma_dev *dev, u8 *lnk_speed,
                              u8 *lnk_state)
{
        int status = -ENOMEM;
        struct ocrdma_get_link_speed_rsp *rsp;
        struct ocrdma_mqe *cmd;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_QUERY_NTWK_LINK_CONFIG_V1,
                                  sizeof(*cmd));
        if (!cmd)
                return status;
        ocrdma_init_mch((struct ocrdma_mbx_hdr *)&cmd->u.cmd[0],
                        OCRDMA_CMD_QUERY_NTWK_LINK_CONFIG_V1,
                        OCRDMA_SUBSYS_COMMON, sizeof(*cmd));

        ((struct ocrdma_mbx_hdr *)cmd->u.cmd)->rsvd_version = 0x1;

        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;

        rsp = (struct ocrdma_get_link_speed_rsp *)cmd;
        if (lnk_speed)
                *lnk_speed = (rsp->pflt_pps_ld_pnum & OCRDMA_PHY_PS_MASK)
                              >> OCRDMA_PHY_PS_SHIFT;
        if (lnk_state)
                *lnk_state = (rsp->res_lnk_st & OCRDMA_LINK_ST_MASK);

mbx_err:
        kfree(cmd);
        return status;
}

static int ocrdma_mbx_get_phy_info(struct ocrdma_dev *dev)
{
        int status = -ENOMEM;
        struct ocrdma_mqe *cmd;
        struct ocrdma_get_phy_info_rsp *rsp;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_PHY_DETAILS, sizeof(*cmd));
        if (!cmd)
                return status;

        ocrdma_init_mch((struct ocrdma_mbx_hdr *)&cmd->u.cmd[0],
                        OCRDMA_CMD_PHY_DETAILS, OCRDMA_SUBSYS_COMMON,
                        sizeof(*cmd));

        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;

        rsp = (struct ocrdma_get_phy_info_rsp *)cmd;
        dev->phy.phy_type =
                        (rsp->ityp_ptyp & OCRDMA_PHY_TYPE_MASK);
        dev->phy.interface_type =
                        (rsp->ityp_ptyp & OCRDMA_IF_TYPE_MASK)
                                >> OCRDMA_IF_TYPE_SHIFT;
        dev->phy.auto_speeds_supported  =
                        (rsp->fspeed_aspeed & OCRDMA_ASPEED_SUPP_MASK);
        dev->phy.fixed_speeds_supported =
                        (rsp->fspeed_aspeed & OCRDMA_FSPEED_SUPP_MASK)
                                >> OCRDMA_FSPEED_SUPP_SHIFT;
mbx_err:
        kfree(cmd);
        return status;
}

int ocrdma_mbx_alloc_pd(struct ocrdma_dev *dev, struct ocrdma_pd *pd)
{
        int status = -ENOMEM;
        struct ocrdma_alloc_pd *cmd;
        struct ocrdma_alloc_pd_rsp *rsp;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_ALLOC_PD, sizeof(*cmd));
        if (!cmd)
                return status;
        if (pd->dpp_enabled)
                cmd->enable_dpp_rsvd |= OCRDMA_ALLOC_PD_ENABLE_DPP;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_alloc_pd_rsp *)cmd;
        pd->id = rsp->dpp_page_pdid & OCRDMA_ALLOC_PD_RSP_PDID_MASK;
        if (rsp->dpp_page_pdid & OCRDMA_ALLOC_PD_RSP_DPP) {
                pd->dpp_enabled = true;
                pd->dpp_page = rsp->dpp_page_pdid >>
                                OCRDMA_ALLOC_PD_RSP_DPP_PAGE_SHIFT;
        } else {
                pd->dpp_enabled = false;
                pd->num_dpp_qp = 0;
        }
mbx_err:
        kfree(cmd);
        return status;
}

int ocrdma_mbx_dealloc_pd(struct ocrdma_dev *dev, struct ocrdma_pd *pd)
{
        int status = -ENOMEM;
        struct ocrdma_dealloc_pd *cmd;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_DEALLOC_PD, sizeof(*cmd));
        if (!cmd)
                return status;
        cmd->id = pd->id;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        kfree(cmd);
        return status;
}


static int ocrdma_mbx_alloc_pd_range(struct ocrdma_dev *dev)
{
        int status = -ENOMEM;
        size_t pd_bitmap_size;
        struct ocrdma_alloc_pd_range *cmd;
        struct ocrdma_alloc_pd_range_rsp *rsp;

        /* Pre allocate the DPP PDs */
        if (dev->attr.max_dpp_pds) {
                cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_ALLOC_PD_RANGE,
                                          sizeof(*cmd));
                if (!cmd)
                        return -ENOMEM;
                cmd->pd_count = dev->attr.max_dpp_pds;
                cmd->enable_dpp_rsvd |= OCRDMA_ALLOC_PD_ENABLE_DPP;
                status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
                rsp = (struct ocrdma_alloc_pd_range_rsp *)cmd;

                if (!status && (rsp->dpp_page_pdid & OCRDMA_ALLOC_PD_RSP_DPP) &&
                    rsp->pd_count) {
                        dev->pd_mgr->dpp_page_index = rsp->dpp_page_pdid >>
                                        OCRDMA_ALLOC_PD_RSP_DPP_PAGE_SHIFT;
                        dev->pd_mgr->pd_dpp_start = rsp->dpp_page_pdid &
                                        OCRDMA_ALLOC_PD_RNG_RSP_START_PDID_MASK;
                        dev->pd_mgr->max_dpp_pd = rsp->pd_count;
                        pd_bitmap_size =
                                BITS_TO_LONGS(rsp->pd_count) * sizeof(long);
                        dev->pd_mgr->pd_dpp_bitmap = kzalloc(pd_bitmap_size,
                                                             GFP_KERNEL);
                }
                kfree(cmd);
        }

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_ALLOC_PD_RANGE, sizeof(*cmd));
        if (!cmd)
                return -ENOMEM;

        cmd->pd_count = dev->attr.max_pd - dev->attr.max_dpp_pds;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        rsp = (struct ocrdma_alloc_pd_range_rsp *)cmd;
        if (!status && rsp->pd_count) {
                dev->pd_mgr->pd_norm_start = rsp->dpp_page_pdid &
                                        OCRDMA_ALLOC_PD_RNG_RSP_START_PDID_MASK;
                dev->pd_mgr->max_normal_pd = rsp->pd_count;
                pd_bitmap_size = BITS_TO_LONGS(rsp->pd_count) * sizeof(long);
                dev->pd_mgr->pd_norm_bitmap = kzalloc(pd_bitmap_size,
                                                      GFP_KERNEL);
        }
        kfree(cmd);

        if (dev->pd_mgr->pd_norm_bitmap || dev->pd_mgr->pd_dpp_bitmap) {
                /* Enable PD resource manager */
                dev->pd_mgr->pd_prealloc_valid = true;
                return 0;
        }
        return status;
}

static void ocrdma_mbx_dealloc_pd_range(struct ocrdma_dev *dev)
{
        struct ocrdma_dealloc_pd_range *cmd;

        /* return normal PDs to firmware */
        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_DEALLOC_PD_RANGE, sizeof(*cmd));
        if (!cmd)
                goto mbx_err;

        if (dev->pd_mgr->max_normal_pd) {
                cmd->start_pd_id = dev->pd_mgr->pd_norm_start;
                cmd->pd_count = dev->pd_mgr->max_normal_pd;
                ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        }

        if (dev->pd_mgr->max_dpp_pd) {
                kfree(cmd);
                /* return DPP PDs to firmware */
                cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_DEALLOC_PD_RANGE,
                                          sizeof(*cmd));
                if (!cmd)
                        goto mbx_err;

                cmd->start_pd_id = dev->pd_mgr->pd_dpp_start;
                cmd->pd_count = dev->pd_mgr->max_dpp_pd;
                ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        }
mbx_err:
        kfree(cmd);
}

void ocrdma_alloc_pd_pool(struct ocrdma_dev *dev)
{
        int status;

        dev->pd_mgr = kzalloc(sizeof(struct ocrdma_pd_resource_mgr),
                              GFP_KERNEL);
        if (!dev->pd_mgr)
                return;

        status = ocrdma_mbx_alloc_pd_range(dev);
        if (status) {
                pr_err("%s(%d) Unable to initialize PD pool, using default.\n",
                         __func__, dev->id);
        }
}

static void ocrdma_free_pd_pool(struct ocrdma_dev *dev)
{
        ocrdma_mbx_dealloc_pd_range(dev);
        kfree(dev->pd_mgr->pd_norm_bitmap);
        kfree(dev->pd_mgr->pd_dpp_bitmap);
        kfree(dev->pd_mgr);
}

static int ocrdma_build_q_conf(u32 *num_entries, int entry_size,
                               int *num_pages, int *page_size)
{
        int i;
        int mem_size;

        *num_entries = roundup_pow_of_two(*num_entries);
        mem_size = *num_entries * entry_size;
        /* find the possible lowest possible multiplier */
        for (i = 0; i < OCRDMA_MAX_Q_PAGE_SIZE_CNT; i++) {
                if (mem_size <= (OCRDMA_Q_PAGE_BASE_SIZE << i))
                        break;
        }
        if (i >= OCRDMA_MAX_Q_PAGE_SIZE_CNT)
                return -EINVAL;
        mem_size = roundup(mem_size,
                       ((OCRDMA_Q_PAGE_BASE_SIZE << i) / OCRDMA_MAX_Q_PAGES));
        *num_pages =
            mem_size / ((OCRDMA_Q_PAGE_BASE_SIZE << i) / OCRDMA_MAX_Q_PAGES);
        *page_size = ((OCRDMA_Q_PAGE_BASE_SIZE << i) / OCRDMA_MAX_Q_PAGES);
        *num_entries = mem_size / entry_size;
        return 0;
}

static int ocrdma_mbx_create_ah_tbl(struct ocrdma_dev *dev)
{
        int i;
        int status = -ENOMEM;
        int max_ah;
        struct ocrdma_create_ah_tbl *cmd;
        struct ocrdma_create_ah_tbl_rsp *rsp;
        struct pci_dev *pdev = dev->nic_info.pdev;
        dma_addr_t pa;
        struct ocrdma_pbe *pbes;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_CREATE_AH_TBL, sizeof(*cmd));
        if (!cmd)
                return status;

        max_ah = OCRDMA_MAX_AH;
        dev->av_tbl.size = sizeof(struct ocrdma_av) * max_ah;

        /* number of PBEs in PBL */
        cmd->ah_conf = (OCRDMA_AH_TBL_PAGES <<
                                OCRDMA_CREATE_AH_NUM_PAGES_SHIFT) &
                                OCRDMA_CREATE_AH_NUM_PAGES_MASK;

        /* page size */
        for (i = 0; i < OCRDMA_MAX_Q_PAGE_SIZE_CNT; i++) {
                if (PAGE_SIZE == (OCRDMA_MIN_Q_PAGE_SIZE << i))
                        break;
        }
        cmd->ah_conf |= (i << OCRDMA_CREATE_AH_PAGE_SIZE_SHIFT) &
                                OCRDMA_CREATE_AH_PAGE_SIZE_MASK;

        /* ah_entry size */
        cmd->ah_conf |= (sizeof(struct ocrdma_av) <<
                                OCRDMA_CREATE_AH_ENTRY_SIZE_SHIFT) &
                                OCRDMA_CREATE_AH_ENTRY_SIZE_MASK;

        dev->av_tbl.pbl.va = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
                                                &dev->av_tbl.pbl.pa,
                                                GFP_KERNEL);
        if (dev->av_tbl.pbl.va == NULL)
                goto mem_err;

        dev->av_tbl.va = dma_alloc_coherent(&pdev->dev, dev->av_tbl.size,
                                            &pa, GFP_KERNEL);
        if (dev->av_tbl.va == NULL)
                goto mem_err_ah;
        dev->av_tbl.pa = pa;
        dev->av_tbl.num_ah = max_ah;

        pbes = (struct ocrdma_pbe *)dev->av_tbl.pbl.va;
        for (i = 0; i < dev->av_tbl.size / OCRDMA_MIN_Q_PAGE_SIZE; i++) {
                pbes[i].pa_lo = (u32)cpu_to_le32(pa & 0xffffffff);
                pbes[i].pa_hi = (u32)cpu_to_le32(upper_32_bits(pa));
                pa += PAGE_SIZE;
        }
        cmd->tbl_addr[0].lo = (u32)(dev->av_tbl.pbl.pa & 0xFFFFFFFF);
        cmd->tbl_addr[0].hi = (u32)upper_32_bits(dev->av_tbl.pbl.pa);
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_create_ah_tbl_rsp *)cmd;
        dev->av_tbl.ahid = rsp->ahid & 0xFFFF;
        kfree(cmd);
        return 0;

mbx_err:
        dma_free_coherent(&pdev->dev, dev->av_tbl.size, dev->av_tbl.va,
                          dev->av_tbl.pa);
        dev->av_tbl.va = NULL;
mem_err_ah:
        dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->av_tbl.pbl.va,
                          dev->av_tbl.pbl.pa);
        dev->av_tbl.pbl.va = NULL;
        dev->av_tbl.size = 0;
mem_err:
        kfree(cmd);
        return status;
}

static void ocrdma_mbx_delete_ah_tbl(struct ocrdma_dev *dev)
{
        struct ocrdma_delete_ah_tbl *cmd;
        struct pci_dev *pdev = dev->nic_info.pdev;

        if (dev->av_tbl.va == NULL)
                return;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_DELETE_AH_TBL, sizeof(*cmd));
        if (!cmd)
                return;
        cmd->ahid = dev->av_tbl.ahid;

        ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        dma_free_coherent(&pdev->dev, dev->av_tbl.size, dev->av_tbl.va,
                          dev->av_tbl.pa);
        dev->av_tbl.va = NULL;
        dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->av_tbl.pbl.va,
                          dev->av_tbl.pbl.pa);
        kfree(cmd);
}

/* Multiple CQs uses the EQ. This routine returns least used
 * EQ to associate with CQ. This will distributes the interrupt
 * processing and CPU load to associated EQ, vector and so to that CPU.
 */
static u16 ocrdma_bind_eq(struct ocrdma_dev *dev)
{
        int i, selected_eq = 0, cq_cnt = 0;
        u16 eq_id;

        mutex_lock(&dev->dev_lock);
        cq_cnt = dev->eq_tbl[0].cq_cnt;
        eq_id = dev->eq_tbl[0].q.id;
        /* find the EQ which is has the least number of
         * CQs associated with it.
         */
        for (i = 0; i < dev->eq_cnt; i++) {
                if (dev->eq_tbl[i].cq_cnt < cq_cnt) {
                        cq_cnt = dev->eq_tbl[i].cq_cnt;
                        eq_id = dev->eq_tbl[i].q.id;
                        selected_eq = i;
                }
        }
        dev->eq_tbl[selected_eq].cq_cnt += 1;
        mutex_unlock(&dev->dev_lock);
        return eq_id;
}

static void ocrdma_unbind_eq(struct ocrdma_dev *dev, u16 eq_id)
{
        int i;

        mutex_lock(&dev->dev_lock);
        i = ocrdma_get_eq_table_index(dev, eq_id);
        if (i == -EINVAL)
                BUG();
        dev->eq_tbl[i].cq_cnt -= 1;
        mutex_unlock(&dev->dev_lock);
}

int ocrdma_mbx_create_cq(struct ocrdma_dev *dev, struct ocrdma_cq *cq,
                         int entries, int dpp_cq, u16 pd_id)
{
        int status = -ENOMEM; int max_hw_cqe;
        struct pci_dev *pdev = dev->nic_info.pdev;
        struct ocrdma_create_cq *cmd;
        struct ocrdma_create_cq_rsp *rsp;
        u32 hw_pages, cqe_size, page_size, cqe_count;

        if (entries > dev->attr.max_cqe) {
                pr_err("%s(%d) max_cqe=0x%x, requester_cqe=0x%x\n",
                       __func__, dev->id, dev->attr.max_cqe, entries);
                return -EINVAL;
        }
        if (dpp_cq && (ocrdma_get_asic_type(dev) != OCRDMA_ASIC_GEN_SKH_R))
                return -EINVAL;

        if (dpp_cq) {
                cq->max_hw_cqe = 1;
                max_hw_cqe = 1;
                cqe_size = OCRDMA_DPP_CQE_SIZE;
                hw_pages = 1;
        } else {
                cq->max_hw_cqe = dev->attr.max_cqe;
                max_hw_cqe = dev->attr.max_cqe;
                cqe_size = sizeof(struct ocrdma_cqe);
                hw_pages = OCRDMA_CREATE_CQ_MAX_PAGES;
        }

        cq->len = roundup(max_hw_cqe * cqe_size, OCRDMA_MIN_Q_PAGE_SIZE);

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_CREATE_CQ, sizeof(*cmd));
        if (!cmd)
                return -ENOMEM;
        ocrdma_init_mch(&cmd->cmd.req, OCRDMA_CMD_CREATE_CQ,
                        OCRDMA_SUBSYS_COMMON, sizeof(*cmd));
        cq->va = dma_alloc_coherent(&pdev->dev, cq->len, &cq->pa, GFP_KERNEL);
        if (!cq->va) {
                status = -ENOMEM;
                goto mem_err;
        }
        page_size = cq->len / hw_pages;
        cmd->cmd.pgsz_pgcnt = (page_size / OCRDMA_MIN_Q_PAGE_SIZE) <<
                                        OCRDMA_CREATE_CQ_PAGE_SIZE_SHIFT;
        cmd->cmd.pgsz_pgcnt |= hw_pages;
        cmd->cmd.ev_cnt_flags = OCRDMA_CREATE_CQ_DEF_FLAGS;

        cq->eqn = ocrdma_bind_eq(dev);
        cmd->cmd.req.rsvd_version = OCRDMA_CREATE_CQ_VER3;
        cqe_count = cq->len / cqe_size;
        cq->cqe_cnt = cqe_count;
        if (cqe_count > 1024) {
                /* Set cnt to 3 to indicate more than 1024 cq entries */
                cmd->cmd.ev_cnt_flags |= (0x3 << OCRDMA_CREATE_CQ_CNT_SHIFT);
        } else {
                u8 count = 0;
                switch (cqe_count) {
                case 256:
                        count = 0;
                        break;
                case 512:
                        count = 1;
                        break;
                case 1024:
                        count = 2;
                        break;
                default:
                        goto mbx_err;
                }
                cmd->cmd.ev_cnt_flags |= (count << OCRDMA_CREATE_CQ_CNT_SHIFT);
        }
        /* shared eq between all the consumer cqs. */
        cmd->cmd.eqn = cq->eqn;
        if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
                if (dpp_cq)
                        cmd->cmd.pgsz_pgcnt |= OCRDMA_CREATE_CQ_DPP <<
                                OCRDMA_CREATE_CQ_TYPE_SHIFT;
                cq->phase_change = false;
                cmd->cmd.pdid_cqecnt = (cq->len / cqe_size);
        } else {
                cmd->cmd.pdid_cqecnt = (cq->len / cqe_size) - 1;
                cmd->cmd.ev_cnt_flags |= OCRDMA_CREATE_CQ_FLAGS_AUTO_VALID;
                cq->phase_change = true;
        }

        /* pd_id valid only for v3 */
        cmd->cmd.pdid_cqecnt |= (pd_id <<
                OCRDMA_CREATE_CQ_CMD_PDID_SHIFT);
        ocrdma_build_q_pages(&cmd->cmd.pa[0], hw_pages, cq->pa, page_size);
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;

        rsp = (struct ocrdma_create_cq_rsp *)cmd;
        cq->id = (u16) (rsp->rsp.cq_id & OCRDMA_CREATE_CQ_RSP_CQ_ID_MASK);
        kfree(cmd);
        return 0;
mbx_err:
        ocrdma_unbind_eq(dev, cq->eqn);
        dma_free_coherent(&pdev->dev, cq->len, cq->va, cq->pa);
mem_err:
        kfree(cmd);
        return status;
}

void ocrdma_mbx_destroy_cq(struct ocrdma_dev *dev, struct ocrdma_cq *cq)
{
        struct ocrdma_destroy_cq *cmd;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_DELETE_CQ, sizeof(*cmd));
        if (!cmd)
                return;
        ocrdma_init_mch(&cmd->req, OCRDMA_CMD_DELETE_CQ,
                        OCRDMA_SUBSYS_COMMON, sizeof(*cmd));

        cmd->bypass_flush_qid |=
            (cq->id << OCRDMA_DESTROY_CQ_QID_SHIFT) &
            OCRDMA_DESTROY_CQ_QID_MASK;

        ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        ocrdma_unbind_eq(dev, cq->eqn);
        dma_free_coherent(&dev->nic_info.pdev->dev, cq->len, cq->va, cq->pa);
        kfree(cmd);
}

int ocrdma_mbx_alloc_lkey(struct ocrdma_dev *dev, struct ocrdma_hw_mr *hwmr,
                          u32 pdid, int addr_check)
{
        int status = -ENOMEM;
        struct ocrdma_alloc_lkey *cmd;
        struct ocrdma_alloc_lkey_rsp *rsp;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_ALLOC_LKEY, sizeof(*cmd));
        if (!cmd)
                return status;
        cmd->pdid = pdid;
        cmd->pbl_sz_flags |= addr_check;
        cmd->pbl_sz_flags |= (hwmr->fr_mr << OCRDMA_ALLOC_LKEY_FMR_SHIFT);
        cmd->pbl_sz_flags |=
            (hwmr->remote_wr << OCRDMA_ALLOC_LKEY_REMOTE_WR_SHIFT);
        cmd->pbl_sz_flags |=
            (hwmr->remote_rd << OCRDMA_ALLOC_LKEY_REMOTE_RD_SHIFT);
        cmd->pbl_sz_flags |=
            (hwmr->local_wr << OCRDMA_ALLOC_LKEY_LOCAL_WR_SHIFT);
        cmd->pbl_sz_flags |=
            (hwmr->remote_atomic << OCRDMA_ALLOC_LKEY_REMOTE_ATOMIC_SHIFT);
        cmd->pbl_sz_flags |=
            (hwmr->num_pbls << OCRDMA_ALLOC_LKEY_PBL_SIZE_SHIFT);

        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_alloc_lkey_rsp *)cmd;
        hwmr->lkey = rsp->lrkey;
mbx_err:
        kfree(cmd);
        return status;
}

int ocrdma_mbx_dealloc_lkey(struct ocrdma_dev *dev, int fr_mr, u32 lkey)
{
        int status;
        struct ocrdma_dealloc_lkey *cmd;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_DEALLOC_LKEY, sizeof(*cmd));
        if (!cmd)
                return -ENOMEM;
        cmd->lkey = lkey;
        cmd->rsvd_frmr = fr_mr ? 1 : 0;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);

        kfree(cmd);
        return status;
}

static int ocrdma_mbx_reg_mr(struct ocrdma_dev *dev, struct ocrdma_hw_mr *hwmr,
                             u32 pdid, u32 pbl_cnt, u32 pbe_size, u32 last)
{
        int status = -ENOMEM;
        int i;
        struct ocrdma_reg_nsmr *cmd;
        struct ocrdma_reg_nsmr_rsp *rsp;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_REGISTER_NSMR, sizeof(*cmd));
        if (!cmd)
                return -ENOMEM;
        cmd->num_pbl_pdid =
            pdid | (hwmr->num_pbls << OCRDMA_REG_NSMR_NUM_PBL_SHIFT);
        cmd->fr_mr = hwmr->fr_mr;

        cmd->flags_hpage_pbe_sz |= (hwmr->remote_wr <<
                                    OCRDMA_REG_NSMR_REMOTE_WR_SHIFT);
        cmd->flags_hpage_pbe_sz |= (hwmr->remote_rd <<
                                    OCRDMA_REG_NSMR_REMOTE_RD_SHIFT);
        cmd->flags_hpage_pbe_sz |= (hwmr->local_wr <<
                                    OCRDMA_REG_NSMR_LOCAL_WR_SHIFT);
        cmd->flags_hpage_pbe_sz |= (hwmr->remote_atomic <<
                                    OCRDMA_REG_NSMR_REMOTE_ATOMIC_SHIFT);
        cmd->flags_hpage_pbe_sz |= (hwmr->mw_bind <<
                                    OCRDMA_REG_NSMR_BIND_MEMWIN_SHIFT);
        cmd->flags_hpage_pbe_sz |= (last << OCRDMA_REG_NSMR_LAST_SHIFT);

        cmd->flags_hpage_pbe_sz |= (hwmr->pbe_size / OCRDMA_MIN_HPAGE_SIZE);
        cmd->flags_hpage_pbe_sz |= (hwmr->pbl_size / OCRDMA_MIN_HPAGE_SIZE) <<
                                        OCRDMA_REG_NSMR_HPAGE_SIZE_SHIFT;
        cmd->totlen_low = hwmr->len;
        cmd->totlen_high = upper_32_bits(hwmr->len);
        cmd->fbo_low = (u32) (hwmr->fbo & 0xffffffff);
        cmd->fbo_high = (u32) upper_32_bits(hwmr->fbo);
        cmd->va_loaddr = (u32) hwmr->va;
        cmd->va_hiaddr = (u32) upper_32_bits(hwmr->va);

        for (i = 0; i < pbl_cnt; i++) {
                cmd->pbl[i].lo = (u32) (hwmr->pbl_table[i].pa & 0xffffffff);
                cmd->pbl[i].hi = upper_32_bits(hwmr->pbl_table[i].pa);
        }
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);

        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_reg_nsmr_rsp *)cmd;
        hwmr->lkey = rsp->lrkey;
mbx_err:
        kfree(cmd);
        return status;
}

static int ocrdma_mbx_reg_mr_cont(struct ocrdma_dev *dev,
                                  struct ocrdma_hw_mr *hwmr, u32 pbl_cnt,
                                  u32 pbl_offset, u32 last)
{
        int status;
        int i;
        struct ocrdma_reg_nsmr_cont *cmd;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_REGISTER_NSMR_CONT, sizeof(*cmd));
        if (!cmd)
                return -ENOMEM;
        cmd->lrkey = hwmr->lkey;
        cmd->num_pbl_offset = (pbl_cnt << OCRDMA_REG_NSMR_CONT_NUM_PBL_SHIFT) |
            (pbl_offset & OCRDMA_REG_NSMR_CONT_PBL_SHIFT_MASK);
        cmd->last = last << OCRDMA_REG_NSMR_CONT_LAST_SHIFT;

        for (i = 0; i < pbl_cnt; i++) {
                cmd->pbl[i].lo =
                    (u32) (hwmr->pbl_table[i + pbl_offset].pa & 0xffffffff);
                cmd->pbl[i].hi =
                    upper_32_bits(hwmr->pbl_table[i + pbl_offset].pa);
        }
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);

        kfree(cmd);
        return status;
}

int ocrdma_reg_mr(struct ocrdma_dev *dev,
                  struct ocrdma_hw_mr *hwmr, u32 pdid, int acc)
{
        int status;
        u32 last = 0;
        u32 cur_pbl_cnt, pbl_offset;
        u32 pending_pbl_cnt = hwmr->num_pbls;

        pbl_offset = 0;
        cur_pbl_cnt = min(pending_pbl_cnt, MAX_OCRDMA_NSMR_PBL);
        if (cur_pbl_cnt == pending_pbl_cnt)
                last = 1;

        status = ocrdma_mbx_reg_mr(dev, hwmr, pdid,
                                   cur_pbl_cnt, hwmr->pbe_size, last);
        if (status) {
                pr_err("%s() status=%d\n", __func__, status);
                return status;
        }
        /* if there is no more pbls to register then exit. */
        if (last)
                return 0;

        while (!last) {
                pbl_offset += cur_pbl_cnt;
                pending_pbl_cnt -= cur_pbl_cnt;
                cur_pbl_cnt = min(pending_pbl_cnt, MAX_OCRDMA_NSMR_PBL);
                /* if we reach the end of the pbls, then need to set the last
                 * bit, indicating no more pbls to register for this memory key.
                 */
                if (cur_pbl_cnt == pending_pbl_cnt)
                        last = 1;

                status = ocrdma_mbx_reg_mr_cont(dev, hwmr, cur_pbl_cnt,
                                                pbl_offset, last);
                if (status)
                        break;
        }
        if (status)
                pr_err("%s() err. status=%d\n", __func__, status);

        return status;
}

bool ocrdma_is_qp_in_sq_flushlist(struct ocrdma_cq *cq, struct ocrdma_qp *qp)
{
        struct ocrdma_qp *tmp;
        bool found = false;
        list_for_each_entry(tmp, &cq->sq_head, sq_entry) {
                if (qp == tmp) {
                        found = true;
                        break;
                }
        }
        return found;
}

bool ocrdma_is_qp_in_rq_flushlist(struct ocrdma_cq *cq, struct ocrdma_qp *qp)
{
        struct ocrdma_qp *tmp;
        bool found = false;
        list_for_each_entry(tmp, &cq->rq_head, rq_entry) {
                if (qp == tmp) {
                        found = true;
                        break;
                }
        }
        return found;
}

void ocrdma_flush_qp(struct ocrdma_qp *qp)
{
        bool found;
        unsigned long flags;
        struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);

        spin_lock_irqsave(&dev->flush_q_lock, flags);
        found = ocrdma_is_qp_in_sq_flushlist(qp->sq_cq, qp);
        if (!found)
                list_add_tail(&qp->sq_entry, &qp->sq_cq->sq_head);
        if (!qp->srq) {
                found = ocrdma_is_qp_in_rq_flushlist(qp->rq_cq, qp);
                if (!found)
                        list_add_tail(&qp->rq_entry, &qp->rq_cq->rq_head);
        }
        spin_unlock_irqrestore(&dev->flush_q_lock, flags);
}

static void ocrdma_init_hwq_ptr(struct ocrdma_qp *qp)
{
        qp->sq.head = 0;
        qp->sq.tail = 0;
        qp->rq.head = 0;
        qp->rq.tail = 0;
}

int ocrdma_qp_state_change(struct ocrdma_qp *qp, enum ib_qp_state new_ib_state,
                           enum ib_qp_state *old_ib_state)
{
        unsigned long flags;
        enum ocrdma_qp_state new_state;
        new_state = get_ocrdma_qp_state(new_ib_state);

        /* sync with wqe and rqe posting */
        spin_lock_irqsave(&qp->q_lock, flags);

        if (old_ib_state)
                *old_ib_state = get_ibqp_state(qp->state);
        if (new_state == qp->state) {
                spin_unlock_irqrestore(&qp->q_lock, flags);
                return 1;
        }


        if (new_state == OCRDMA_QPS_INIT) {
                ocrdma_init_hwq_ptr(qp);
                ocrdma_del_flush_qp(qp);
        } else if (new_state == OCRDMA_QPS_ERR) {
                ocrdma_flush_qp(qp);
        }

        qp->state = new_state;

        spin_unlock_irqrestore(&qp->q_lock, flags);
        return 0;
}

static u32 ocrdma_set_create_qp_mbx_access_flags(struct ocrdma_qp *qp)
{
        u32 flags = 0;
        if (qp->cap_flags & OCRDMA_QP_INB_RD)
                flags |= OCRDMA_CREATE_QP_REQ_INB_RDEN_MASK;
        if (qp->cap_flags & OCRDMA_QP_INB_WR)
                flags |= OCRDMA_CREATE_QP_REQ_INB_WREN_MASK;
        if (qp->cap_flags & OCRDMA_QP_MW_BIND)
                flags |= OCRDMA_CREATE_QP_REQ_BIND_MEMWIN_MASK;
        if (qp->cap_flags & OCRDMA_QP_LKEY0)
                flags |= OCRDMA_CREATE_QP_REQ_ZERO_LKEYEN_MASK;
        if (qp->cap_flags & OCRDMA_QP_FAST_REG)
                flags |= OCRDMA_CREATE_QP_REQ_FMR_EN_MASK;
        return flags;
}

static int ocrdma_set_create_qp_sq_cmd(struct ocrdma_create_qp_req *cmd,
                                        struct ib_qp_init_attr *attrs,
                                        struct ocrdma_qp *qp)
{
        int status;
        u32 len, hw_pages, hw_page_size;
        dma_addr_t pa;
        struct ocrdma_pd *pd = qp->pd;
        struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
        struct pci_dev *pdev = dev->nic_info.pdev;
        u32 max_wqe_allocated;
        u32 max_sges = attrs->cap.max_send_sge;

        /* QP1 may exceed 127 */
        max_wqe_allocated = min_t(u32, attrs->cap.max_send_wr + 1,
                                dev->attr.max_wqe);

        status = ocrdma_build_q_conf(&max_wqe_allocated,
                dev->attr.wqe_size, &hw_pages, &hw_page_size);
        if (status) {
                pr_err("%s() req. max_send_wr=0x%x\n", __func__,
                       max_wqe_allocated);
                return -EINVAL;
        }
        qp->sq.max_cnt = max_wqe_allocated;
        len = (hw_pages * hw_page_size);

        qp->sq.va = dma_alloc_coherent(&pdev->dev, len, &pa, GFP_KERNEL);
        if (!qp->sq.va)
                return -EINVAL;
        qp->sq.len = len;
        qp->sq.pa = pa;
        qp->sq.entry_size = dev->attr.wqe_size;
        ocrdma_build_q_pages(&cmd->wq_addr[0], hw_pages, pa, hw_page_size);

        cmd->type_pgsz_pdn |= (ilog2(hw_page_size / OCRDMA_MIN_Q_PAGE_SIZE)
                                << OCRDMA_CREATE_QP_REQ_SQ_PAGE_SIZE_SHIFT);
        cmd->num_wq_rq_pages |= (hw_pages <<
                                 OCRDMA_CREATE_QP_REQ_NUM_WQ_PAGES_SHIFT) &
            OCRDMA_CREATE_QP_REQ_NUM_WQ_PAGES_MASK;
        cmd->max_sge_send_write |= (max_sges <<
                                    OCRDMA_CREATE_QP_REQ_MAX_SGE_SEND_SHIFT) &
            OCRDMA_CREATE_QP_REQ_MAX_SGE_SEND_MASK;
        cmd->max_sge_send_write |= (max_sges <<
                                    OCRDMA_CREATE_QP_REQ_MAX_SGE_WRITE_SHIFT) &
                                        OCRDMA_CREATE_QP_REQ_MAX_SGE_WRITE_MASK;
        cmd->max_wqe_rqe |= (ilog2(qp->sq.max_cnt) <<
                             OCRDMA_CREATE_QP_REQ_MAX_WQE_SHIFT) &
                                OCRDMA_CREATE_QP_REQ_MAX_WQE_MASK;
        cmd->wqe_rqe_size |= (dev->attr.wqe_size <<
                              OCRDMA_CREATE_QP_REQ_WQE_SIZE_SHIFT) &
                                OCRDMA_CREATE_QP_REQ_WQE_SIZE_MASK;
        return 0;
}

static int ocrdma_set_create_qp_rq_cmd(struct ocrdma_create_qp_req *cmd,
                                        struct ib_qp_init_attr *attrs,
                                        struct ocrdma_qp *qp)
{
        int status;
        u32 len, hw_pages, hw_page_size;
        dma_addr_t pa = 0;
        struct ocrdma_pd *pd = qp->pd;
        struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
        struct pci_dev *pdev = dev->nic_info.pdev;
        u32 max_rqe_allocated = attrs->cap.max_recv_wr + 1;

        status = ocrdma_build_q_conf(&max_rqe_allocated, dev->attr.rqe_size,
                                     &hw_pages, &hw_page_size);
        if (status) {
                pr_err("%s() req. max_recv_wr=0x%x\n", __func__,
                       attrs->cap.max_recv_wr + 1);
                return status;
        }
        qp->rq.max_cnt = max_rqe_allocated;
        len = (hw_pages * hw_page_size);

        qp->rq.va = dma_alloc_coherent(&pdev->dev, len, &pa, GFP_KERNEL);
        if (!qp->rq.va)
                return -ENOMEM;
        qp->rq.pa = pa;
        qp->rq.len = len;
        qp->rq.entry_size = dev->attr.rqe_size;

        ocrdma_build_q_pages(&cmd->rq_addr[0], hw_pages, pa, hw_page_size);
        cmd->type_pgsz_pdn |= (ilog2(hw_page_size / OCRDMA_MIN_Q_PAGE_SIZE) <<
                OCRDMA_CREATE_QP_REQ_RQ_PAGE_SIZE_SHIFT);
        cmd->num_wq_rq_pages |=
            (hw_pages << OCRDMA_CREATE_QP_REQ_NUM_RQ_PAGES_SHIFT) &
            OCRDMA_CREATE_QP_REQ_NUM_RQ_PAGES_MASK;
        cmd->max_sge_recv_flags |= (attrs->cap.max_recv_sge <<
                                OCRDMA_CREATE_QP_REQ_MAX_SGE_RECV_SHIFT) &
                                OCRDMA_CREATE_QP_REQ_MAX_SGE_RECV_MASK;
        cmd->max_wqe_rqe |= (ilog2(qp->rq.max_cnt) <<
                                OCRDMA_CREATE_QP_REQ_MAX_RQE_SHIFT) &
                                OCRDMA_CREATE_QP_REQ_MAX_RQE_MASK;
        cmd->wqe_rqe_size |= (dev->attr.rqe_size <<
                        OCRDMA_CREATE_QP_REQ_RQE_SIZE_SHIFT) &
                        OCRDMA_CREATE_QP_REQ_RQE_SIZE_MASK;
        return 0;
}

static void ocrdma_set_create_qp_dpp_cmd(struct ocrdma_create_qp_req *cmd,
                                         struct ocrdma_pd *pd,
                                         struct ocrdma_qp *qp,
                                         u8 enable_dpp_cq, u16 dpp_cq_id)
{
        pd->num_dpp_qp--;
        qp->dpp_enabled = true;
        cmd->max_sge_recv_flags |= OCRDMA_CREATE_QP_REQ_ENABLE_DPP_MASK;
        if (!enable_dpp_cq)
                return;
        cmd->max_sge_recv_flags |= OCRDMA_CREATE_QP_REQ_ENABLE_DPP_MASK;
        cmd->dpp_credits_cqid = dpp_cq_id;
        cmd->dpp_credits_cqid |= OCRDMA_CREATE_QP_REQ_DPP_CREDIT_LIMIT <<
                                        OCRDMA_CREATE_QP_REQ_DPP_CREDIT_SHIFT;
}

static int ocrdma_set_create_qp_ird_cmd(struct ocrdma_create_qp_req *cmd,
                                        struct ocrdma_qp *qp)
{
        struct ocrdma_pd *pd = qp->pd;
        struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
        struct pci_dev *pdev = dev->nic_info.pdev;
        dma_addr_t pa = 0;
        int ird_page_size = dev->attr.ird_page_size;
        int ird_q_len = dev->attr.num_ird_pages * ird_page_size;
        struct ocrdma_hdr_wqe *rqe;
        int i  = 0;

        if (dev->attr.ird == 0)
                return 0;

        qp->ird_q_va = dma_alloc_coherent(&pdev->dev, ird_q_len, &pa,
                                          GFP_KERNEL);
        if (!qp->ird_q_va)
                return -ENOMEM;
        ocrdma_build_q_pages(&cmd->ird_addr[0], dev->attr.num_ird_pages,
                             pa, ird_page_size);
        for (; i < ird_q_len / dev->attr.rqe_size; i++) {
                rqe = (struct ocrdma_hdr_wqe *)(qp->ird_q_va +
                        (i * dev->attr.rqe_size));
                rqe->cw = 0;
                rqe->cw |= 2;
                rqe->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
                rqe->cw |= (8 << OCRDMA_WQE_SIZE_SHIFT);
                rqe->cw |= (8 << OCRDMA_WQE_NXT_WQE_SIZE_SHIFT);
        }
        return 0;
}

static void ocrdma_get_create_qp_rsp(struct ocrdma_create_qp_rsp *rsp,
                                     struct ocrdma_qp *qp,
                                     struct ib_qp_init_attr *attrs,
                                     u16 *dpp_offset, u16 *dpp_credit_lmt)
{
        u32 max_wqe_allocated, max_rqe_allocated;
        qp->id = rsp->qp_id & OCRDMA_CREATE_QP_RSP_QP_ID_MASK;
        qp->rq.dbid = rsp->sq_rq_id & OCRDMA_CREATE_QP_RSP_RQ_ID_MASK;
        qp->sq.dbid = rsp->sq_rq_id >> OCRDMA_CREATE_QP_RSP_SQ_ID_SHIFT;
        qp->max_ird = rsp->max_ord_ird & OCRDMA_CREATE_QP_RSP_MAX_IRD_MASK;
        qp->max_ord = (rsp->max_ord_ird >> OCRDMA_CREATE_QP_RSP_MAX_ORD_SHIFT);
        qp->dpp_enabled = false;
        if (rsp->dpp_response & OCRDMA_CREATE_QP_RSP_DPP_ENABLED_MASK) {
                qp->dpp_enabled = true;
                *dpp_credit_lmt = (rsp->dpp_response &
                                OCRDMA_CREATE_QP_RSP_DPP_CREDITS_MASK) >>
                                OCRDMA_CREATE_QP_RSP_DPP_CREDITS_SHIFT;
                *dpp_offset = (rsp->dpp_response &
                                OCRDMA_CREATE_QP_RSP_DPP_PAGE_OFFSET_MASK) >>
                                OCRDMA_CREATE_QP_RSP_DPP_PAGE_OFFSET_SHIFT;
        }
        max_wqe_allocated =
                rsp->max_wqe_rqe >> OCRDMA_CREATE_QP_RSP_MAX_WQE_SHIFT;
        max_wqe_allocated = 1 << max_wqe_allocated;
        max_rqe_allocated = 1 << ((u16)rsp->max_wqe_rqe);

        qp->sq.max_cnt = max_wqe_allocated;
        qp->sq.max_wqe_idx = max_wqe_allocated - 1;

        if (!attrs->srq) {
                qp->rq.max_cnt = max_rqe_allocated;
                qp->rq.max_wqe_idx = max_rqe_allocated - 1;
        }
}

int ocrdma_mbx_create_qp(struct ocrdma_qp *qp, struct ib_qp_init_attr *attrs,
                         u8 enable_dpp_cq, u16 dpp_cq_id, u16 *dpp_offset,
                         u16 *dpp_credit_lmt)
{
        int status = -ENOMEM;
        u32 flags = 0;
        struct ocrdma_pd *pd = qp->pd;
        struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
        struct pci_dev *pdev = dev->nic_info.pdev;
        struct ocrdma_cq *cq;
        struct ocrdma_create_qp_req *cmd;
        struct ocrdma_create_qp_rsp *rsp;
        int qptype;

        switch (attrs->qp_type) {
        case IB_QPT_GSI:
                qptype = OCRDMA_QPT_GSI;
                break;
        case IB_QPT_RC:
                qptype = OCRDMA_QPT_RC;
                break;
        case IB_QPT_UD:
                qptype = OCRDMA_QPT_UD;
                break;
        default:
                return -EINVAL;
        }

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_CREATE_QP, sizeof(*cmd));
        if (!cmd)
                return status;
        cmd->type_pgsz_pdn |= (qptype << OCRDMA_CREATE_QP_REQ_QPT_SHIFT) &
                                                OCRDMA_CREATE_QP_REQ_QPT_MASK;
        status = ocrdma_set_create_qp_sq_cmd(cmd, attrs, qp);
        if (status)
                goto sq_err;

        if (attrs->srq) {
                struct ocrdma_srq *srq = get_ocrdma_srq(attrs->srq);
                cmd->max_sge_recv_flags |= OCRDMA_CREATE_QP_REQ_USE_SRQ_MASK;
                cmd->rq_addr[0].lo = srq->id;
                qp->srq = srq;
        } else {
                status = ocrdma_set_create_qp_rq_cmd(cmd, attrs, qp);
                if (status)
                        goto rq_err;
        }

        status = ocrdma_set_create_qp_ird_cmd(cmd, qp);
        if (status)
                goto mbx_err;

        cmd->type_pgsz_pdn |= (pd->id << OCRDMA_CREATE_QP_REQ_PD_ID_SHIFT) &
                                OCRDMA_CREATE_QP_REQ_PD_ID_MASK;

        flags = ocrdma_set_create_qp_mbx_access_flags(qp);

        cmd->max_sge_recv_flags |= flags;
        cmd->max_ord_ird |= (dev->attr.max_ord_per_qp <<
                             OCRDMA_CREATE_QP_REQ_MAX_ORD_SHIFT) &
                                OCRDMA_CREATE_QP_REQ_MAX_ORD_MASK;
        cmd->max_ord_ird |= (dev->attr.max_ird_per_qp <<
                             OCRDMA_CREATE_QP_REQ_MAX_IRD_SHIFT) &
                                OCRDMA_CREATE_QP_REQ_MAX_IRD_MASK;
        cq = get_ocrdma_cq(attrs->send_cq);
        cmd->wq_rq_cqid |= (cq->id << OCRDMA_CREATE_QP_REQ_WQ_CQID_SHIFT) &
                                OCRDMA_CREATE_QP_REQ_WQ_CQID_MASK;
        qp->sq_cq = cq;
        cq = get_ocrdma_cq(attrs->recv_cq);
        cmd->wq_rq_cqid |= (cq->id << OCRDMA_CREATE_QP_REQ_RQ_CQID_SHIFT) &
                                OCRDMA_CREATE_QP_REQ_RQ_CQID_MASK;
        qp->rq_cq = cq;

        if (pd->dpp_enabled && attrs->cap.max_inline_data && pd->num_dpp_qp &&
            (attrs->cap.max_inline_data <= dev->attr.max_inline_data)) {
                ocrdma_set_create_qp_dpp_cmd(cmd, pd, qp, enable_dpp_cq,
                                             dpp_cq_id);
        }

        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_create_qp_rsp *)cmd;
        ocrdma_get_create_qp_rsp(rsp, qp, attrs, dpp_offset, dpp_credit_lmt);
        qp->state = OCRDMA_QPS_RST;
        kfree(cmd);
        return 0;
mbx_err:
        if (qp->rq.va)
                dma_free_coherent(&pdev->dev, qp->rq.len, qp->rq.va, qp->rq.pa);
rq_err:
        pr_err("%s(%d) rq_err\n", __func__, dev->id);
        dma_free_coherent(&pdev->dev, qp->sq.len, qp->sq.va, qp->sq.pa);
sq_err:
        pr_err("%s(%d) sq_err\n", __func__, dev->id);
        kfree(cmd);
        return status;
}

int ocrdma_mbx_query_qp(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
                        struct ocrdma_qp_params *param)
{
        int status = -ENOMEM;
        struct ocrdma_query_qp *cmd;
        struct ocrdma_query_qp_rsp *rsp;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_QUERY_QP, sizeof(*rsp));
        if (!cmd)
                return status;
        cmd->qp_id = qp->id;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_query_qp_rsp *)cmd;
        memcpy(param, &rsp->params, sizeof(struct ocrdma_qp_params));
mbx_err:
        kfree(cmd);
        return status;
}

static int ocrdma_set_av_params(struct ocrdma_qp *qp,
                                struct ocrdma_modify_qp *cmd,
                                struct ib_qp_attr *attrs,
                                int attr_mask)
{
        int status;
        struct rdma_ah_attr *ah_attr = &attrs->ah_attr;
        const struct ib_gid_attr *sgid_attr;
        u16 vlan_id = 0xFFFF;
        u8 mac_addr[6], hdr_type;
        union {
                struct sockaddr_in  _sockaddr_in;
                struct sockaddr_in6 _sockaddr_in6;
        } sgid_addr, dgid_addr;
        struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);
        const struct ib_global_route *grh;

        if ((rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) == 0)
                return -EINVAL;
        grh = rdma_ah_read_grh(ah_attr);
        if (atomic_cmpxchg(&dev->update_sl, 1, 0))
                ocrdma_init_service_level(dev);
        cmd->params.tclass_sq_psn |=
            (grh->traffic_class << OCRDMA_QP_PARAMS_TCLASS_SHIFT);
        cmd->params.rnt_rc_sl_fl |=
            (grh->flow_label & OCRDMA_QP_PARAMS_FLOW_LABEL_MASK);
        cmd->params.rnt_rc_sl_fl |= (rdma_ah_get_sl(ah_attr) <<
                                     OCRDMA_QP_PARAMS_SL_SHIFT);
        cmd->params.hop_lmt_rq_psn |=
            (grh->hop_limit << OCRDMA_QP_PARAMS_HOP_LMT_SHIFT);
        cmd->flags |= OCRDMA_QP_PARA_FLOW_LBL_VALID;

        /* GIDs */
        memcpy(&cmd->params.dgid[0], &grh->dgid.raw[0],
               sizeof(cmd->params.dgid));

        sgid_attr = ah_attr->grh.sgid_attr;
        status = rdma_read_gid_l2_fields(sgid_attr, &vlan_id, &mac_addr[0]);
        if (status)
                return status;

        qp->sgid_idx = grh->sgid_index;
        memcpy(&cmd->params.sgid[0], &sgid_attr->gid.raw[0],
               sizeof(cmd->params.sgid));
        status = ocrdma_resolve_dmac(dev, ah_attr, &mac_addr[0]);
        if (status)
                return status;

        cmd->params.dmac_b0_to_b3 = mac_addr[0] | (mac_addr[1] << 8) |
                                (mac_addr[2] << 16) | (mac_addr[3] << 24);

        hdr_type = rdma_gid_attr_network_type(sgid_attr);
        if (hdr_type == RDMA_NETWORK_IPV4) {
                rdma_gid2ip((struct sockaddr *)&sgid_addr, &sgid_attr->gid);
                rdma_gid2ip((struct sockaddr *)&dgid_addr, &grh->dgid);
                memcpy(&cmd->params.dgid[0],
                       &dgid_addr._sockaddr_in.sin_addr.s_addr, 4);
                memcpy(&cmd->params.sgid[0],
                       &sgid_addr._sockaddr_in.sin_addr.s_addr, 4);
        }
        /* convert them to LE format. */
        ocrdma_cpu_to_le32(&cmd->params.dgid[0], sizeof(cmd->params.dgid));
        ocrdma_cpu_to_le32(&cmd->params.sgid[0], sizeof(cmd->params.sgid));
        cmd->params.vlan_dmac_b4_to_b5 = mac_addr[4] | (mac_addr[5] << 8);

        if (vlan_id == 0xFFFF)
                vlan_id = 0;
        if (vlan_id || dev->pfc_state) {
                if (!vlan_id) {
                        pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
                               dev->id);
                        pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
                               dev->id);
                }
                cmd->params.vlan_dmac_b4_to_b5 |=
                    vlan_id << OCRDMA_QP_PARAMS_VLAN_SHIFT;
                cmd->flags |= OCRDMA_QP_PARA_VLAN_EN_VALID;
                cmd->params.rnt_rc_sl_fl |=
                        (dev->sl & 0x07) << OCRDMA_QP_PARAMS_SL_SHIFT;
        }
        cmd->params.max_sge_recv_flags |= ((hdr_type <<
                                        OCRDMA_QP_PARAMS_FLAGS_L3_TYPE_SHIFT) &
                                        OCRDMA_QP_PARAMS_FLAGS_L3_TYPE_MASK);
        return 0;
}

static int ocrdma_set_qp_params(struct ocrdma_qp *qp,
                                struct ocrdma_modify_qp *cmd,
                                struct ib_qp_attr *attrs, int attr_mask)
{
        int status = 0;
        struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);

        if (attr_mask & IB_QP_PKEY_INDEX) {
                cmd->params.path_mtu_pkey_indx |= (attrs->pkey_index &
                                            OCRDMA_QP_PARAMS_PKEY_INDEX_MASK);
                cmd->flags |= OCRDMA_QP_PARA_PKEY_VALID;
        }
        if (attr_mask & IB_QP_QKEY) {
                qp->qkey = attrs->qkey;
                cmd->params.qkey = attrs->qkey;
                cmd->flags |= OCRDMA_QP_PARA_QKEY_VALID;
        }
        if (attr_mask & IB_QP_AV) {
                status = ocrdma_set_av_params(qp, cmd, attrs, attr_mask);
                if (status)
                        return status;
        } else if (qp->qp_type == IB_QPT_GSI || qp->qp_type == IB_QPT_UD) {
                /* set the default mac address for UD, GSI QPs */
                cmd->params.dmac_b0_to_b3 = dev->nic_info.mac_addr[0] |
                        (dev->nic_info.mac_addr[1] << 8) |
                        (dev->nic_info.mac_addr[2] << 16) |
                        (dev->nic_info.mac_addr[3] << 24);
                cmd->params.vlan_dmac_b4_to_b5 = dev->nic_info.mac_addr[4] |
                                        (dev->nic_info.mac_addr[5] << 8);
        }
        if ((attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) &&
            attrs->en_sqd_async_notify) {
                cmd->params.max_sge_recv_flags |=
                        OCRDMA_QP_PARAMS_FLAGS_SQD_ASYNC;
                cmd->flags |= OCRDMA_QP_PARA_DST_QPN_VALID;
        }
        if (attr_mask & IB_QP_DEST_QPN) {
                cmd->params.ack_to_rnr_rtc_dest_qpn |= (attrs->dest_qp_num &
                                OCRDMA_QP_PARAMS_DEST_QPN_MASK);
                cmd->flags |= OCRDMA_QP_PARA_DST_QPN_VALID;
        }
        if (attr_mask & IB_QP_PATH_MTU) {
                if (attrs->path_mtu < IB_MTU_512 ||
                    attrs->path_mtu > IB_MTU_4096) {
                        pr_err("ocrdma%d: IB MTU %d is not supported\n",
                               dev->id, ib_mtu_enum_to_int(attrs->path_mtu));
                        status = -EINVAL;
                        goto pmtu_err;
                }
                cmd->params.path_mtu_pkey_indx |=
                    (ib_mtu_enum_to_int(attrs->path_mtu) <<
                     OCRDMA_QP_PARAMS_PATH_MTU_SHIFT) &
                    OCRDMA_QP_PARAMS_PATH_MTU_MASK;
                cmd->flags |= OCRDMA_QP_PARA_PMTU_VALID;
        }
        if (attr_mask & IB_QP_TIMEOUT) {
                cmd->params.ack_to_rnr_rtc_dest_qpn |= attrs->timeout <<
                    OCRDMA_QP_PARAMS_ACK_TIMEOUT_SHIFT;
                cmd->flags |= OCRDMA_QP_PARA_ACK_TO_VALID;
        }
        if (attr_mask & IB_QP_RETRY_CNT) {
                cmd->params.rnt_rc_sl_fl |= (attrs->retry_cnt <<
                                      OCRDMA_QP_PARAMS_RETRY_CNT_SHIFT) &
                    OCRDMA_QP_PARAMS_RETRY_CNT_MASK;
                cmd->flags |= OCRDMA_QP_PARA_RETRY_CNT_VALID;
        }
        if (attr_mask & IB_QP_MIN_RNR_TIMER) {
                cmd->params.rnt_rc_sl_fl |= (attrs->min_rnr_timer <<
                                      OCRDMA_QP_PARAMS_RNR_NAK_TIMER_SHIFT) &
                    OCRDMA_QP_PARAMS_RNR_NAK_TIMER_MASK;
                cmd->flags |= OCRDMA_QP_PARA_RNT_VALID;
        }
        if (attr_mask & IB_QP_RNR_RETRY) {
                cmd->params.ack_to_rnr_rtc_dest_qpn |= (attrs->rnr_retry <<
                        OCRDMA_QP_PARAMS_RNR_RETRY_CNT_SHIFT)
                        & OCRDMA_QP_PARAMS_RNR_RETRY_CNT_MASK;
                cmd->flags |= OCRDMA_QP_PARA_RRC_VALID;
        }
        if (attr_mask & IB_QP_SQ_PSN) {
                cmd->params.tclass_sq_psn |= (attrs->sq_psn & 0x00ffffff);
                cmd->flags |= OCRDMA_QP_PARA_SQPSN_VALID;
        }
        if (attr_mask & IB_QP_RQ_PSN) {
                cmd->params.hop_lmt_rq_psn |= (attrs->rq_psn & 0x00ffffff);
                cmd->flags |= OCRDMA_QP_PARA_RQPSN_VALID;
        }
        if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
                if (attrs->max_rd_atomic > dev->attr.max_ord_per_qp) {
                        status = -EINVAL;
                        goto pmtu_err;
                }
                qp->max_ord = attrs->max_rd_atomic;
                cmd->flags |= OCRDMA_QP_PARA_MAX_ORD_VALID;
        }
        if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
                if (attrs->max_dest_rd_atomic > dev->attr.max_ird_per_qp) {
                        status = -EINVAL;
                        goto pmtu_err;
                }
                qp->max_ird = attrs->max_dest_rd_atomic;
                cmd->flags |= OCRDMA_QP_PARA_MAX_IRD_VALID;
        }
        cmd->params.max_ord_ird = (qp->max_ord <<
                                OCRDMA_QP_PARAMS_MAX_ORD_SHIFT) |
                                (qp->max_ird & OCRDMA_QP_PARAMS_MAX_IRD_MASK);
pmtu_err:
        return status;
}

int ocrdma_mbx_modify_qp(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
                         struct ib_qp_attr *attrs, int attr_mask)
{
        int status = -ENOMEM;
        struct ocrdma_modify_qp *cmd;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_MODIFY_QP, sizeof(*cmd));
        if (!cmd)
                return status;

        cmd->params.id = qp->id;
        cmd->flags = 0;
        if (attr_mask & IB_QP_STATE) {
                cmd->params.max_sge_recv_flags |=
                    (get_ocrdma_qp_state(attrs->qp_state) <<
                     OCRDMA_QP_PARAMS_STATE_SHIFT) &
                    OCRDMA_QP_PARAMS_STATE_MASK;
                cmd->flags |= OCRDMA_QP_PARA_QPS_VALID;
        } else {
                cmd->params.max_sge_recv_flags |=
                    (qp->state << OCRDMA_QP_PARAMS_STATE_SHIFT) &
                    OCRDMA_QP_PARAMS_STATE_MASK;
        }

        status = ocrdma_set_qp_params(qp, cmd, attrs, attr_mask);
        if (status)
                goto mbx_err;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;

mbx_err:
        kfree(cmd);
        return status;
}

int ocrdma_mbx_destroy_qp(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
{
        int status = -ENOMEM;
        struct ocrdma_destroy_qp *cmd;
        struct pci_dev *pdev = dev->nic_info.pdev;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_DELETE_QP, sizeof(*cmd));
        if (!cmd)
                return status;
        cmd->qp_id = qp->id;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;

mbx_err:
        kfree(cmd);
        if (qp->sq.va)
                dma_free_coherent(&pdev->dev, qp->sq.len, qp->sq.va, qp->sq.pa);
        if (!qp->srq && qp->rq.va)
                dma_free_coherent(&pdev->dev, qp->rq.len, qp->rq.va, qp->rq.pa);
        if (qp->dpp_enabled)
                qp->pd->num_dpp_qp++;
        return status;
}

int ocrdma_mbx_create_srq(struct ocrdma_dev *dev, struct ocrdma_srq *srq,
                          struct ib_srq_init_attr *srq_attr,
                          struct ocrdma_pd *pd)
{
        int status = -ENOMEM;
        int hw_pages, hw_page_size;
        int len;
        struct ocrdma_create_srq_rsp *rsp;
        struct ocrdma_create_srq *cmd;
        dma_addr_t pa;
        struct pci_dev *pdev = dev->nic_info.pdev;
        u32 max_rqe_allocated;

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_CREATE_SRQ, sizeof(*cmd));
        if (!cmd)
                return status;

        cmd->pgsz_pdid = pd->id & OCRDMA_CREATE_SRQ_PD_ID_MASK;
        max_rqe_allocated = srq_attr->attr.max_wr + 1;
        status = ocrdma_build_q_conf(&max_rqe_allocated,
                                dev->attr.rqe_size,
                                &hw_pages, &hw_page_size);
        if (status) {
                pr_err("%s() req. max_wr=0x%x\n", __func__,
                       srq_attr->attr.max_wr);
                status = -EINVAL;
                goto ret;
        }
        len = hw_pages * hw_page_size;
        srq->rq.va = dma_alloc_coherent(&pdev->dev, len, &pa, GFP_KERNEL);
        if (!srq->rq.va) {
                status = -ENOMEM;
                goto ret;
        }
        ocrdma_build_q_pages(&cmd->rq_addr[0], hw_pages, pa, hw_page_size);

        srq->rq.entry_size = dev->attr.rqe_size;
        srq->rq.pa = pa;
        srq->rq.len = len;
        srq->rq.max_cnt = max_rqe_allocated;

        cmd->max_sge_rqe = ilog2(max_rqe_allocated);
        cmd->max_sge_rqe |= srq_attr->attr.max_sge <<
                                OCRDMA_CREATE_SRQ_MAX_SGE_RECV_SHIFT;

        cmd->pgsz_pdid |= (ilog2(hw_page_size / OCRDMA_MIN_Q_PAGE_SIZE)
                << OCRDMA_CREATE_SRQ_PG_SZ_SHIFT);
        cmd->pages_rqe_sz |= (dev->attr.rqe_size
                << OCRDMA_CREATE_SRQ_RQE_SIZE_SHIFT)
                & OCRDMA_CREATE_SRQ_RQE_SIZE_MASK;
        cmd->pages_rqe_sz |= hw_pages << OCRDMA_CREATE_SRQ_NUM_RQ_PAGES_SHIFT;

        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status)
                goto mbx_err;
        rsp = (struct ocrdma_create_srq_rsp *)cmd;
        srq->id = rsp->id;
        srq->rq.dbid = rsp->id;
        max_rqe_allocated = ((rsp->max_sge_rqe_allocated &
                OCRDMA_CREATE_SRQ_RSP_MAX_RQE_ALLOCATED_MASK) >>
                OCRDMA_CREATE_SRQ_RSP_MAX_RQE_ALLOCATED_SHIFT);
        max_rqe_allocated = (1 << max_rqe_allocated);
        srq->rq.max_cnt = max_rqe_allocated;
        srq->rq.max_wqe_idx = max_rqe_allocated - 1;
        srq->rq.max_sges = (rsp->max_sge_rqe_allocated &
                OCRDMA_CREATE_SRQ_RSP_MAX_SGE_RECV_ALLOCATED_MASK) >>
                OCRDMA_CREATE_SRQ_RSP_MAX_SGE_RECV_ALLOCATED_SHIFT;
        goto ret;
mbx_err:
        dma_free_coherent(&pdev->dev, srq->rq.len, srq->rq.va, pa);
ret:
        kfree(cmd);
        return status;
}

int ocrdma_mbx_modify_srq(struct ocrdma_srq *srq, struct ib_srq_attr *srq_attr)
{
        int status = -ENOMEM;
        struct ocrdma_modify_srq *cmd;
        struct ocrdma_pd *pd = srq->pd;
        struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_MODIFY_SRQ, sizeof(*cmd));
        if (!cmd)
                return status;
        cmd->id = srq->id;
        cmd->limit_max_rqe |= srq_attr->srq_limit <<
            OCRDMA_MODIFY_SRQ_LIMIT_SHIFT;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        kfree(cmd);
        return status;
}

int ocrdma_mbx_query_srq(struct ocrdma_srq *srq, struct ib_srq_attr *srq_attr)
{
        int status = -ENOMEM;
        struct ocrdma_query_srq *cmd;
        struct ocrdma_dev *dev = get_ocrdma_dev(srq->ibsrq.device);

        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_QUERY_SRQ, sizeof(*cmd));
        if (!cmd)
                return status;
        cmd->id = srq->rq.dbid;
        status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (status == 0) {
                struct ocrdma_query_srq_rsp *rsp =
                    (struct ocrdma_query_srq_rsp *)cmd;
                srq_attr->max_sge =
                    rsp->srq_lmt_max_sge &
                    OCRDMA_QUERY_SRQ_RSP_MAX_SGE_RECV_MASK;
                srq_attr->max_wr =
                    rsp->max_rqe_pdid >> OCRDMA_QUERY_SRQ_RSP_MAX_RQE_SHIFT;
                srq_attr->srq_limit = rsp->srq_lmt_max_sge >>
                    OCRDMA_QUERY_SRQ_RSP_SRQ_LIMIT_SHIFT;
        }
        kfree(cmd);
        return status;
}

void ocrdma_mbx_destroy_srq(struct ocrdma_dev *dev, struct ocrdma_srq *srq)
{
        struct ocrdma_destroy_srq *cmd;
        struct pci_dev *pdev = dev->nic_info.pdev;
        cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_DELETE_SRQ, sizeof(*cmd));
        if (!cmd)
                return;
        cmd->id = srq->id;
        ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
        if (srq->rq.va)
                dma_free_coherent(&pdev->dev, srq->rq.len,
                                  srq->rq.va, srq->rq.pa);
        kfree(cmd);
}

static int ocrdma_mbx_get_dcbx_config(struct ocrdma_dev *dev, u32 ptype,
                                      struct ocrdma_dcbx_cfg *dcbxcfg)
{
        int status;
        dma_addr_t pa;
        struct ocrdma_mqe cmd;

        struct ocrdma_get_dcbx_cfg_req *req = NULL;
        struct ocrdma_get_dcbx_cfg_rsp *rsp = NULL;
        struct pci_dev *pdev = dev->nic_info.pdev;
        struct ocrdma_mqe_sge *mqe_sge = cmd.u.nonemb_req.sge;

        memset(&cmd, 0, sizeof(struct ocrdma_mqe));
        cmd.hdr.pyld_len = max_t (u32, sizeof(struct ocrdma_get_dcbx_cfg_rsp),
                                        sizeof(struct ocrdma_get_dcbx_cfg_req));
        req = dma_alloc_coherent(&pdev->dev, cmd.hdr.pyld_len, &pa, GFP_KERNEL);
        if (!req) {
                status = -ENOMEM;
                goto mem_err;
        }

        cmd.hdr.spcl_sge_cnt_emb |= (1 << OCRDMA_MQE_HDR_SGE_CNT_SHIFT) &
                                        OCRDMA_MQE_HDR_SGE_CNT_MASK;
        mqe_sge->pa_lo = (u32) (pa & 0xFFFFFFFFUL);
        mqe_sge->pa_hi = (u32) upper_32_bits(pa);
        mqe_sge->len = cmd.hdr.pyld_len;

        ocrdma_init_mch(&req->hdr, OCRDMA_CMD_GET_DCBX_CONFIG,
                        OCRDMA_SUBSYS_DCBX, cmd.hdr.pyld_len);
        req->param_type = ptype;

        status = ocrdma_mbx_cmd(dev, &cmd);
        if (status)
                goto mbx_err;

        rsp = (struct ocrdma_get_dcbx_cfg_rsp *)req;
        ocrdma_le32_to_cpu(rsp, sizeof(struct ocrdma_get_dcbx_cfg_rsp));
        memcpy(dcbxcfg, &rsp->cfg, sizeof(struct ocrdma_dcbx_cfg));

mbx_err:
        dma_free_coherent(&pdev->dev, cmd.hdr.pyld_len, req, pa);
mem_err:
        return status;
}

#define OCRDMA_MAX_SERVICE_LEVEL_INDEX  0x08
#define OCRDMA_DEFAULT_SERVICE_LEVEL    0x05

static int ocrdma_parse_dcbxcfg_rsp(struct ocrdma_dev *dev, int ptype,
                                    struct ocrdma_dcbx_cfg *dcbxcfg,
                                    u8 *srvc_lvl)
{
        int status = -EINVAL, indx, slindx;
        int ventry_cnt;
        struct ocrdma_app_parameter *app_param;
        u8 valid, proto_sel;
        u8 app_prio, pfc_prio;
        u16 proto;

        if (!(dcbxcfg->tcv_aev_opv_st & OCRDMA_DCBX_STATE_MASK)) {
                pr_info("%s ocrdma%d DCBX is disabled\n",
                        dev_name(&dev->nic_info.pdev->dev), dev->id);
                goto out;
        }

        if (!ocrdma_is_enabled_and_synced(dcbxcfg->pfc_state)) {
                pr_info("%s ocrdma%d priority flow control(%s) is %s%s\n",
                        dev_name(&dev->nic_info.pdev->dev), dev->id,
                        (ptype > 0 ? "operational" : "admin"),
                        (dcbxcfg->pfc_state & OCRDMA_STATE_FLAG_ENABLED) ?
                        "enabled" : "disabled",
                        (dcbxcfg->pfc_state & OCRDMA_STATE_FLAG_SYNC) ?
                        "" : ", not sync'ed");
                goto out;
        } else {
                pr_info("%s ocrdma%d priority flow control is enabled and sync'ed\n",
                        dev_name(&dev->nic_info.pdev->dev), dev->id);
        }

        ventry_cnt = (dcbxcfg->tcv_aev_opv_st >>
                                OCRDMA_DCBX_APP_ENTRY_SHIFT)
                                & OCRDMA_DCBX_STATE_MASK;

        for (indx = 0; indx < ventry_cnt; indx++) {
                app_param = &dcbxcfg->app_param[indx];
                valid = (app_param->valid_proto_app >>
                                OCRDMA_APP_PARAM_VALID_SHIFT)
                                & OCRDMA_APP_PARAM_VALID_MASK;
                proto_sel = (app_param->valid_proto_app
                                >>  OCRDMA_APP_PARAM_PROTO_SEL_SHIFT)
                                & OCRDMA_APP_PARAM_PROTO_SEL_MASK;
                proto = app_param->valid_proto_app &
                                OCRDMA_APP_PARAM_APP_PROTO_MASK;

                if (
                        valid && proto == ETH_P_IBOE &&
                        proto_sel == OCRDMA_PROTO_SELECT_L2) {
                        for (slindx = 0; slindx <
                                OCRDMA_MAX_SERVICE_LEVEL_INDEX; slindx++) {
                                app_prio = ocrdma_get_app_prio(
                                                (u8 *)app_param->app_prio,
                                                slindx);
                                pfc_prio = ocrdma_get_pfc_prio(
                                                (u8 *)dcbxcfg->pfc_prio,
                                                slindx);

                                if (app_prio && pfc_prio) {
                                        *srvc_lvl = slindx;
                                        status = 0;
                                        goto out;
                                }
                        }
                        if (slindx == OCRDMA_MAX_SERVICE_LEVEL_INDEX) {
                                pr_info("%s ocrdma%d application priority not set for 0x%x protocol\n",
                                        dev_name(&dev->nic_info.pdev->dev),
                                        dev->id, proto);
                        }
                }
        }

out:
        return status;
}