// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
/* QLogic qed NIC Driver
 * Copyright (c) 2015-2017  QLogic Corporation
 * Copyright (c) 2019-2020 Marvell International Ltd.
 */

#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/spinlock.h>
#include <linux/tcp.h>
#include "qed_cxt.h"
#include "qed_hw.h"
#include "qed_ll2.h"
#include "qed_rdma.h"
#include "qed_reg_addr.h"
#include "qed_sp.h"
#include "qed_ooo.h"

#define QED_IWARP_ORD_DEFAULT           32
#define QED_IWARP_IRD_DEFAULT           32
#define QED_IWARP_MAX_FW_MSS            4120

#define QED_EP_SIG 0xecabcdef

struct mpa_v2_hdr {
        __be16 ird;
        __be16 ord;
};

#define MPA_V2_PEER2PEER_MODEL  0x8000
#define MPA_V2_SEND_RTR         0x4000  /* on ird */
#define MPA_V2_READ_RTR         0x4000  /* on ord */
#define MPA_V2_WRITE_RTR        0x8000
#define MPA_V2_IRD_ORD_MASK     0x3FFF

#define MPA_REV2(_mpa_rev) ((_mpa_rev) == MPA_NEGOTIATION_TYPE_ENHANCED)

#define QED_IWARP_INVALID_TCP_CID       0xffffffff

#define QED_IWARP_RCV_WND_SIZE_DEF_BB_2P (200 * 1024)
#define QED_IWARP_RCV_WND_SIZE_DEF_BB_4P (100 * 1024)
#define QED_IWARP_RCV_WND_SIZE_DEF_AH_2P (150 * 1024)
#define QED_IWARP_RCV_WND_SIZE_DEF_AH_4P (90 * 1024)

#define QED_IWARP_RCV_WND_SIZE_MIN      (0xffff)
#define TIMESTAMP_HEADER_SIZE           (12)
#define QED_IWARP_MAX_FIN_RT_DEFAULT    (2)

#define QED_IWARP_TS_EN                 BIT(0)
#define QED_IWARP_DA_EN                 BIT(1)
#define QED_IWARP_PARAM_CRC_NEEDED      (1)
#define QED_IWARP_PARAM_P2P             (1)

#define QED_IWARP_DEF_MAX_RT_TIME       (0)
#define QED_IWARP_DEF_CWND_FACTOR       (4)
#define QED_IWARP_DEF_KA_MAX_PROBE_CNT  (5)
#define QED_IWARP_DEF_KA_TIMEOUT        (1200000)       /* 20 min */
#define QED_IWARP_DEF_KA_INTERVAL       (1000)          /* 1 sec */

static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,
                                 __le16 echo, union event_ring_data *data,
                                 u8 fw_return_code);

/* Override devinfo with iWARP specific values */
void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn)
{
        struct qed_rdma_device *dev = p_hwfn->p_rdma_info->dev;

        dev->max_inline = IWARP_REQ_MAX_INLINE_DATA_SIZE;
        dev->max_qp = min_t(u32,
                            IWARP_MAX_QPS,
                            p_hwfn->p_rdma_info->num_qps) -
                      QED_IWARP_PREALLOC_CNT;

        dev->max_cq = dev->max_qp;

        dev->max_qp_resp_rd_atomic_resc = QED_IWARP_IRD_DEFAULT;
        dev->max_qp_req_rd_atomic_resc = QED_IWARP_ORD_DEFAULT;
}

void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
        p_hwfn->rdma_prs_search_reg = PRS_REG_SEARCH_TCP;
        qed_wr(p_hwfn, p_ptt, p_hwfn->rdma_prs_search_reg, 1);
        p_hwfn->b_rdma_enabled_in_prs = true;
}

/* We have two cid maps, one for tcp which should be used only from passive
 * syn processing and replacing a pre-allocated ep in the list. The second
 * for active tcp and for QPs.
 */
static void qed_iwarp_cid_cleaned(struct qed_hwfn *p_hwfn, u32 cid)
{
        cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);

        spin_lock_bh(&p_hwfn->p_rdma_info->lock);

        if (cid < QED_IWARP_PREALLOC_CNT)
                qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
                                    cid);
        else
                qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);

        spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
}

void
qed_iwarp_init_fw_ramrod(struct qed_hwfn *p_hwfn,
                         struct iwarp_init_func_ramrod_data *p_ramrod)
{
        p_ramrod->iwarp.ll2_ooo_q_index =
            RESC_START(p_hwfn, QED_LL2_RAM_QUEUE) +
            p_hwfn->p_rdma_info->iwarp.ll2_ooo_handle;

        p_ramrod->tcp.max_fin_rt = QED_IWARP_MAX_FIN_RT_DEFAULT;

        return;
}

static int qed_iwarp_alloc_cid(struct qed_hwfn *p_hwfn, u32 *cid)
{
        int rc;

        spin_lock_bh(&p_hwfn->p_rdma_info->lock);
        rc = qed_rdma_bmap_alloc_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, cid);
        spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
        if (rc) {
                DP_NOTICE(p_hwfn, "Failed in allocating iwarp cid\n");
                return rc;
        }
        *cid += qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);

        rc = qed_cxt_dynamic_ilt_alloc(p_hwfn, QED_ELEM_CXT, *cid);
        if (rc)
                qed_iwarp_cid_cleaned(p_hwfn, *cid);

        return rc;
}

static void qed_iwarp_set_tcp_cid(struct qed_hwfn *p_hwfn, u32 cid)
{
        cid -= qed_cxt_get_proto_cid_start(p_hwfn, p_hwfn->p_rdma_info->proto);

        spin_lock_bh(&p_hwfn->p_rdma_info->lock);
        qed_bmap_set_id(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, cid);
        spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
}

/* This function allocates a cid for passive tcp (called from syn receive)
 * the reason it's separate from the regular cid allocation is because it
 * is assured that these cids already have ilt allocated. They are preallocated
 * to ensure that we won't need to allocate memory during syn processing
 */
static int qed_iwarp_alloc_tcp_cid(struct qed_hwfn *p_hwfn, u32 *cid)
{
        int rc;

        spin_lock_bh(&p_hwfn->p_rdma_info->lock);

        rc = qed_rdma_bmap_alloc_id(p_hwfn,
                                    &p_hwfn->p_rdma_info->tcp_cid_map, cid);

        spin_unlock_bh(&p_hwfn->p_rdma_info->lock);

        if (rc) {
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "can't allocate iwarp tcp cid max-count=%d\n",
                           p_hwfn->p_rdma_info->tcp_cid_map.max_count);

                *cid = QED_IWARP_INVALID_TCP_CID;
                return rc;
        }

        *cid += qed_cxt_get_proto_cid_start(p_hwfn,
                                            p_hwfn->p_rdma_info->proto);
        return 0;
}

int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
                        struct qed_rdma_qp *qp,
                        struct qed_rdma_create_qp_out_params *out_params)
{
        struct iwarp_create_qp_ramrod_data *p_ramrod;
        struct qed_sp_init_data init_data;
        struct qed_spq_entry *p_ent;
        u16 physical_queue;
        u32 cid;
        int rc;

        qp->shared_queue = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
                                              IWARP_SHARED_QUEUE_PAGE_SIZE,
                                              &qp->shared_queue_phys_addr,
                                              GFP_KERNEL);
        if (!qp->shared_queue)
                return -ENOMEM;

        out_params->sq_pbl_virt = (u8 *)qp->shared_queue +
            IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
        out_params->sq_pbl_phys = qp->shared_queue_phys_addr +
            IWARP_SHARED_QUEUE_PAGE_SQ_PBL_OFFSET;
        out_params->rq_pbl_virt = (u8 *)qp->shared_queue +
            IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;
        out_params->rq_pbl_phys = qp->shared_queue_phys_addr +
            IWARP_SHARED_QUEUE_PAGE_RQ_PBL_OFFSET;

        rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
        if (rc)
                goto err1;

        qp->icid = (u16)cid;

        memset(&init_data, 0, sizeof(init_data));
        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
        init_data.cid = qp->icid;
        init_data.comp_mode = QED_SPQ_MODE_EBLOCK;

        rc = qed_sp_init_request(p_hwfn, &p_ent,
                                 IWARP_RAMROD_CMD_ID_CREATE_QP,
                                 PROTOCOLID_IWARP, &init_data);
        if (rc)
                goto err2;

        p_ramrod = &p_ent->ramrod.iwarp_create_qp;

        SET_FIELD(p_ramrod->flags,
                  IWARP_CREATE_QP_RAMROD_DATA_FMR_AND_RESERVED_EN,
                  qp->fmr_and_reserved_lkey);

        SET_FIELD(p_ramrod->flags,
                  IWARP_CREATE_QP_RAMROD_DATA_SIGNALED_COMP, qp->signal_all);

        SET_FIELD(p_ramrod->flags,
                  IWARP_CREATE_QP_RAMROD_DATA_RDMA_RD_EN,
                  qp->incoming_rdma_read_en);

        SET_FIELD(p_ramrod->flags,
                  IWARP_CREATE_QP_RAMROD_DATA_RDMA_WR_EN,
                  qp->incoming_rdma_write_en);

        SET_FIELD(p_ramrod->flags,
                  IWARP_CREATE_QP_RAMROD_DATA_ATOMIC_EN,
                  qp->incoming_atomic_en);

        SET_FIELD(p_ramrod->flags,
                  IWARP_CREATE_QP_RAMROD_DATA_SRQ_FLG, qp->use_srq);

        p_ramrod->pd = cpu_to_le16(qp->pd);
        p_ramrod->sq_num_pages = cpu_to_le16(qp->sq_num_pages);
        p_ramrod->rq_num_pages = cpu_to_le16(qp->rq_num_pages);

        p_ramrod->srq_id.srq_idx = cpu_to_le16(qp->srq_id);
        p_ramrod->srq_id.opaque_fid = cpu_to_le16(p_hwfn->hw_info.opaque_fid);
        p_ramrod->qp_handle_for_cqe.hi = qp->qp_handle.hi;
        p_ramrod->qp_handle_for_cqe.lo = qp->qp_handle.lo;

        p_ramrod->cq_cid_for_sq =
            cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->sq_cq_id);
        p_ramrod->cq_cid_for_rq =
            cpu_to_le32((p_hwfn->hw_info.opaque_fid << 16) | qp->rq_cq_id);

        p_ramrod->dpi = cpu_to_le16(qp->dpi);

        physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
        p_ramrod->physical_q0 = cpu_to_le16(physical_queue);
        physical_queue = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
        p_ramrod->physical_q1 = cpu_to_le16(physical_queue);

        rc = qed_spq_post(p_hwfn, p_ent, NULL);
        if (rc)
                goto err2;

        return rc;

err2:
        qed_iwarp_cid_cleaned(p_hwfn, cid);
err1:
        dma_free_coherent(&p_hwfn->cdev->pdev->dev,
                          IWARP_SHARED_QUEUE_PAGE_SIZE,
                          qp->shared_queue, qp->shared_queue_phys_addr);

        return rc;
}

static int qed_iwarp_modify_fw(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
{
        struct iwarp_modify_qp_ramrod_data *p_ramrod;
        struct qed_sp_init_data init_data;
        struct qed_spq_entry *p_ent;
        u16 flags, trans_to_state;
        int rc;

        /* Get SPQ entry */
        memset(&init_data, 0, sizeof(init_data));
        init_data.cid = qp->icid;
        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
        init_data.comp_mode = QED_SPQ_MODE_EBLOCK;

        rc = qed_sp_init_request(p_hwfn, &p_ent,
                                 IWARP_RAMROD_CMD_ID_MODIFY_QP,
                                 p_hwfn->p_rdma_info->proto, &init_data);
        if (rc)
                return rc;

        p_ramrod = &p_ent->ramrod.iwarp_modify_qp;

        flags = le16_to_cpu(p_ramrod->flags);
        SET_FIELD(flags, IWARP_MODIFY_QP_RAMROD_DATA_STATE_TRANS_EN, 0x1);
        p_ramrod->flags = cpu_to_le16(flags);

        if (qp->iwarp_state == QED_IWARP_QP_STATE_CLOSING)
                trans_to_state = IWARP_MODIFY_QP_STATE_CLOSING;
        else
                trans_to_state = IWARP_MODIFY_QP_STATE_ERROR;

        p_ramrod->transition_to_state = cpu_to_le16(trans_to_state);

        rc = qed_spq_post(p_hwfn, p_ent, NULL);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x)rc=%d\n", qp->icid, rc);

        return rc;
}

enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state)
{
        switch (state) {
        case QED_ROCE_QP_STATE_RESET:
        case QED_ROCE_QP_STATE_INIT:
        case QED_ROCE_QP_STATE_RTR:
                return QED_IWARP_QP_STATE_IDLE;
        case QED_ROCE_QP_STATE_RTS:
                return QED_IWARP_QP_STATE_RTS;
        case QED_ROCE_QP_STATE_SQD:
                return QED_IWARP_QP_STATE_CLOSING;
        case QED_ROCE_QP_STATE_ERR:
                return QED_IWARP_QP_STATE_ERROR;
        case QED_ROCE_QP_STATE_SQE:
                return QED_IWARP_QP_STATE_TERMINATE;
        default:
                return QED_IWARP_QP_STATE_ERROR;
        }
}

static enum qed_roce_qp_state
qed_iwarp2roce_state(enum qed_iwarp_qp_state state)
{
        switch (state) {
        case QED_IWARP_QP_STATE_IDLE:
                return QED_ROCE_QP_STATE_INIT;
        case QED_IWARP_QP_STATE_RTS:
                return QED_ROCE_QP_STATE_RTS;
        case QED_IWARP_QP_STATE_TERMINATE:
                return QED_ROCE_QP_STATE_SQE;
        case QED_IWARP_QP_STATE_CLOSING:
                return QED_ROCE_QP_STATE_SQD;
        case QED_IWARP_QP_STATE_ERROR:
                return QED_ROCE_QP_STATE_ERR;
        default:
                return QED_ROCE_QP_STATE_ERR;
        }
}

static const char * const iwarp_state_names[] = {
        "IDLE",
        "RTS",
        "TERMINATE",
        "CLOSING",
        "ERROR",
};

int
qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn,
                    struct qed_rdma_qp *qp,
                    enum qed_iwarp_qp_state new_state, bool internal)
{
        enum qed_iwarp_qp_state prev_iw_state;
        bool modify_fw = false;
        int rc = 0;

        /* modify QP can be called from upper-layer or as a result of async
         * RST/FIN... therefore need to protect
         */
        spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
        prev_iw_state = qp->iwarp_state;

        if (prev_iw_state == new_state) {
                spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);
                return 0;
        }

        switch (prev_iw_state) {
        case QED_IWARP_QP_STATE_IDLE:
                switch (new_state) {
                case QED_IWARP_QP_STATE_RTS:
                        qp->iwarp_state = QED_IWARP_QP_STATE_RTS;
                        break;
                case QED_IWARP_QP_STATE_ERROR:
                        qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
                        if (!internal)
                                modify_fw = true;
                        break;
                default:
                        break;
                }
                break;
        case QED_IWARP_QP_STATE_RTS:
                switch (new_state) {
                case QED_IWARP_QP_STATE_CLOSING:
                        if (!internal)
                                modify_fw = true;

                        qp->iwarp_state = QED_IWARP_QP_STATE_CLOSING;
                        break;
                case QED_IWARP_QP_STATE_ERROR:
                        if (!internal)
                                modify_fw = true;
                        qp->iwarp_state = QED_IWARP_QP_STATE_ERROR;
                        break;
                default:
                        break;
                }
                break;
        case QED_IWARP_QP_STATE_ERROR:
                switch (new_state) {
                case QED_IWARP_QP_STATE_IDLE:

                        qp->iwarp_state = new_state;
                        break;
                case QED_IWARP_QP_STATE_CLOSING:
                        /* could happen due to race... do nothing.... */
                        break;
                default:
                        rc = -EINVAL;
                }
                break;
        case QED_IWARP_QP_STATE_TERMINATE:
        case QED_IWARP_QP_STATE_CLOSING:
                qp->iwarp_state = new_state;
                break;
        default:
                break;
        }

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) %s --> %s%s\n",
                   qp->icid,
                   iwarp_state_names[prev_iw_state],
                   iwarp_state_names[qp->iwarp_state],
                   internal ? "internal" : "");

        spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.qp_lock);

        if (modify_fw)
                rc = qed_iwarp_modify_fw(p_hwfn, qp);

        return rc;
}

int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
{
        struct qed_sp_init_data init_data;
        struct qed_spq_entry *p_ent;
        int rc;

        /* Get SPQ entry */
        memset(&init_data, 0, sizeof(init_data));
        init_data.cid = qp->icid;
        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
        init_data.comp_mode = QED_SPQ_MODE_EBLOCK;

        rc = qed_sp_init_request(p_hwfn, &p_ent,
                                 IWARP_RAMROD_CMD_ID_DESTROY_QP,
                                 p_hwfn->p_rdma_info->proto, &init_data);
        if (rc)
                return rc;

        rc = qed_spq_post(p_hwfn, p_ent, NULL);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) rc = %d\n", qp->icid, rc);

        return rc;
}

static void qed_iwarp_destroy_ep(struct qed_hwfn *p_hwfn,
                                 struct qed_iwarp_ep *ep,
                                 bool remove_from_active_list)
{
        dma_free_coherent(&p_hwfn->cdev->pdev->dev,
                          sizeof(*ep->ep_buffer_virt),
                          ep->ep_buffer_virt, ep->ep_buffer_phys);

        if (remove_from_active_list) {
                spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
                list_del(&ep->list_entry);
                spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
        }

        if (ep->qp)
                ep->qp->ep = NULL;

        kfree(ep);
}

int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
{
        struct qed_iwarp_ep *ep = qp->ep;
        int wait_count = 0;
        int rc = 0;

        if (qp->iwarp_state != QED_IWARP_QP_STATE_ERROR) {
                rc = qed_iwarp_modify_qp(p_hwfn, qp,
                                         QED_IWARP_QP_STATE_ERROR, false);
                if (rc)
                        return rc;
        }

        /* Make sure ep is closed before returning and freeing memory. */
        if (ep) {
                while (READ_ONCE(ep->state) != QED_IWARP_EP_CLOSED &&
                       wait_count++ < 200)
                        msleep(100);

                if (ep->state != QED_IWARP_EP_CLOSED)
                        DP_NOTICE(p_hwfn, "ep state close timeout state=%x\n",
                                  ep->state);

                qed_iwarp_destroy_ep(p_hwfn, ep, false);
        }

        rc = qed_iwarp_fw_destroy(p_hwfn, qp);

        if (qp->shared_queue)
                dma_free_coherent(&p_hwfn->cdev->pdev->dev,
                                  IWARP_SHARED_QUEUE_PAGE_SIZE,
                                  qp->shared_queue, qp->shared_queue_phys_addr);

        return rc;
}

static int
qed_iwarp_create_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep **ep_out)
{
        struct qed_iwarp_ep *ep;
        int rc;

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

        ep->state = QED_IWARP_EP_INIT;

        ep->ep_buffer_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
                                                sizeof(*ep->ep_buffer_virt),
                                                &ep->ep_buffer_phys,
                                                GFP_KERNEL);
        if (!ep->ep_buffer_virt) {
                rc = -ENOMEM;
                goto err;
        }

        ep->sig = QED_EP_SIG;

        *ep_out = ep;

        return 0;

err:
        kfree(ep);
        return rc;
}

static void
qed_iwarp_print_tcp_ramrod(struct qed_hwfn *p_hwfn,
                           struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod)
{
        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "local_mac=%x %x %x, remote_mac=%x %x %x\n",
                   p_tcp_ramrod->tcp.local_mac_addr_lo,
                   p_tcp_ramrod->tcp.local_mac_addr_mid,
                   p_tcp_ramrod->tcp.local_mac_addr_hi,
                   p_tcp_ramrod->tcp.remote_mac_addr_lo,
                   p_tcp_ramrod->tcp.remote_mac_addr_mid,
                   p_tcp_ramrod->tcp.remote_mac_addr_hi);

        if (p_tcp_ramrod->tcp.ip_version == TCP_IPV4) {
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "local_ip=%pI4h:%x, remote_ip=%pI4h:%x, vlan=%x\n",
                           p_tcp_ramrod->tcp.local_ip,
                           p_tcp_ramrod->tcp.local_port,
                           p_tcp_ramrod->tcp.remote_ip,
                           p_tcp_ramrod->tcp.remote_port,
                           p_tcp_ramrod->tcp.vlan_id);
        } else {
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "local_ip=%pI6:%x, remote_ip=%pI6:%x, vlan=%x\n",
                           p_tcp_ramrod->tcp.local_ip,
                           p_tcp_ramrod->tcp.local_port,
                           p_tcp_ramrod->tcp.remote_ip,
                           p_tcp_ramrod->tcp.remote_port,
                           p_tcp_ramrod->tcp.vlan_id);
        }

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                   "flow_label=%x, ttl=%x, tos_or_tc=%x, mss=%x, rcv_wnd_scale=%x, connect_mode=%x, flags=%x\n",
                   p_tcp_ramrod->tcp.flow_label,
                   p_tcp_ramrod->tcp.ttl,
                   p_tcp_ramrod->tcp.tos_or_tc,
                   p_tcp_ramrod->tcp.mss,
                   p_tcp_ramrod->tcp.rcv_wnd_scale,
                   p_tcp_ramrod->tcp.connect_mode,
                   p_tcp_ramrod->tcp.flags);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "syn_ip_payload_length=%x, lo=%x, hi=%x\n",
                   p_tcp_ramrod->tcp.syn_ip_payload_length,
                   p_tcp_ramrod->tcp.syn_phy_addr_lo,
                   p_tcp_ramrod->tcp.syn_phy_addr_hi);
}

static int
qed_iwarp_tcp_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
{
        struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
        struct iwarp_tcp_offload_ramrod_data *p_tcp_ramrod;
        struct tcp_offload_params_opt2 *tcp;
        struct qed_sp_init_data init_data;
        struct qed_spq_entry *p_ent;
        dma_addr_t async_output_phys;
        dma_addr_t in_pdata_phys;
        u16 physical_q;
        u16 flags = 0;
        u8 tcp_flags;
        int rc;
        int i;

        memset(&init_data, 0, sizeof(init_data));
        init_data.cid = ep->tcp_cid;
        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
        if (ep->connect_mode == TCP_CONNECT_PASSIVE)
                init_data.comp_mode = QED_SPQ_MODE_CB;
        else
                init_data.comp_mode = QED_SPQ_MODE_EBLOCK;

        rc = qed_sp_init_request(p_hwfn, &p_ent,
                                 IWARP_RAMROD_CMD_ID_TCP_OFFLOAD,
                                 PROTOCOLID_IWARP, &init_data);
        if (rc)
                return rc;

        p_tcp_ramrod = &p_ent->ramrod.iwarp_tcp_offload;

        in_pdata_phys = ep->ep_buffer_phys +
                        offsetof(struct qed_iwarp_ep_memory, in_pdata);
        DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.incoming_ulp_buffer.addr,
                       in_pdata_phys);

        p_tcp_ramrod->iwarp.incoming_ulp_buffer.len =
            cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));

        async_output_phys = ep->ep_buffer_phys +
                            offsetof(struct qed_iwarp_ep_memory, async_output);
        DMA_REGPAIR_LE(p_tcp_ramrod->iwarp.async_eqe_output_buf,
                       async_output_phys);

        p_tcp_ramrod->iwarp.handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
        p_tcp_ramrod->iwarp.handle_for_async.lo = cpu_to_le32(PTR_LO(ep));

        physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
        p_tcp_ramrod->iwarp.physical_q0 = cpu_to_le16(physical_q);
        physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
        p_tcp_ramrod->iwarp.physical_q1 = cpu_to_le16(physical_q);
        p_tcp_ramrod->iwarp.mpa_mode = iwarp_info->mpa_rev;

        tcp = &p_tcp_ramrod->tcp;
        qed_set_fw_mac_addr(&tcp->remote_mac_addr_hi,
                            &tcp->remote_mac_addr_mid,
                            &tcp->remote_mac_addr_lo, ep->remote_mac_addr);
        qed_set_fw_mac_addr(&tcp->local_mac_addr_hi, &tcp->local_mac_addr_mid,
                            &tcp->local_mac_addr_lo, ep->local_mac_addr);

        tcp->vlan_id = cpu_to_le16(ep->cm_info.vlan);

        tcp_flags = p_hwfn->p_rdma_info->iwarp.tcp_flags;

        SET_FIELD(flags, TCP_OFFLOAD_PARAMS_OPT2_TS_EN,
                  !!(tcp_flags & QED_IWARP_TS_EN));

        SET_FIELD(flags, TCP_OFFLOAD_PARAMS_OPT2_DA_EN,
                  !!(tcp_flags & QED_IWARP_DA_EN));

        tcp->flags = cpu_to_le16(flags);
        tcp->ip_version = ep->cm_info.ip_version;

        for (i = 0; i < 4; i++) {
                tcp->remote_ip[i] = cpu_to_le32(ep->cm_info.remote_ip[i]);
                tcp->local_ip[i] = cpu_to_le32(ep->cm_info.local_ip[i]);
        }

        tcp->remote_port = cpu_to_le16(ep->cm_info.remote_port);
        tcp->local_port = cpu_to_le16(ep->cm_info.local_port);
        tcp->mss = cpu_to_le16(ep->mss);
        tcp->flow_label = 0;
        tcp->ttl = 0x40;
        tcp->tos_or_tc = 0;

        tcp->max_rt_time = QED_IWARP_DEF_MAX_RT_TIME;
        tcp->cwnd = cpu_to_le32(QED_IWARP_DEF_CWND_FACTOR * ep->mss);
        tcp->ka_max_probe_cnt = QED_IWARP_DEF_KA_MAX_PROBE_CNT;
        tcp->ka_timeout = cpu_to_le32(QED_IWARP_DEF_KA_TIMEOUT);
        tcp->ka_interval = cpu_to_le32(QED_IWARP_DEF_KA_INTERVAL);

        tcp->rcv_wnd_scale = (u8)p_hwfn->p_rdma_info->iwarp.rcv_wnd_scale;
        tcp->connect_mode = ep->connect_mode;

        if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
                tcp->syn_ip_payload_length =
                        cpu_to_le16(ep->syn_ip_payload_length);
                tcp->syn_phy_addr_hi = DMA_HI_LE(ep->syn_phy_addr);
                tcp->syn_phy_addr_lo = DMA_LO_LE(ep->syn_phy_addr);
        }

        qed_iwarp_print_tcp_ramrod(p_hwfn, p_tcp_ramrod);

        rc = qed_spq_post(p_hwfn, p_ent, NULL);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                   "EP(0x%x) Offload completed rc=%d\n", ep->tcp_cid, rc);

        return rc;
}

static void
qed_iwarp_mpa_received(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
{
        struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
        struct qed_iwarp_cm_event_params params;
        struct mpa_v2_hdr *mpa_v2;
        union async_output *async_data;
        u16 mpa_ord, mpa_ird;
        u8 mpa_hdr_size = 0;
        u16 ulp_data_len;
        u8 mpa_rev;

        async_data = &ep->ep_buffer_virt->async_output;

        mpa_rev = async_data->mpa_request.mpa_handshake_mode;
        DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                   "private_data_len=%x handshake_mode=%x private_data=(%x)\n",
                   async_data->mpa_request.ulp_data_len,
                   mpa_rev, *((u32 *)(ep->ep_buffer_virt->in_pdata)));

        if (mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
                /* Read ord/ird values from private data buffer */
                mpa_v2 = (struct mpa_v2_hdr *)ep->ep_buffer_virt->in_pdata;
                mpa_hdr_size = sizeof(*mpa_v2);

                mpa_ord = ntohs(mpa_v2->ord);
                mpa_ird = ntohs(mpa_v2->ird);

                /* Temprary store in cm_info incoming ord/ird requested, later
                 * replace with negotiated value during accept
                 */
                ep->cm_info.ord = (u8)min_t(u16,
                                            (mpa_ord & MPA_V2_IRD_ORD_MASK),
                                            QED_IWARP_ORD_DEFAULT);

                ep->cm_info.ird = (u8)min_t(u16,
                                            (mpa_ird & MPA_V2_IRD_ORD_MASK),
                                            QED_IWARP_IRD_DEFAULT);

                /* Peer2Peer negotiation */
                ep->rtr_type = MPA_RTR_TYPE_NONE;
                if (mpa_ird & MPA_V2_PEER2PEER_MODEL) {
                        if (mpa_ord & MPA_V2_WRITE_RTR)
                                ep->rtr_type |= MPA_RTR_TYPE_ZERO_WRITE;

                        if (mpa_ord & MPA_V2_READ_RTR)
                                ep->rtr_type |= MPA_RTR_TYPE_ZERO_READ;

                        if (mpa_ird & MPA_V2_SEND_RTR)
                                ep->rtr_type |= MPA_RTR_TYPE_ZERO_SEND;

                        ep->rtr_type &= iwarp_info->rtr_type;

                        /* if we're left with no match send our capabilities */
                        if (ep->rtr_type == MPA_RTR_TYPE_NONE)
                                ep->rtr_type = iwarp_info->rtr_type;
                }

                ep->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;
        } else {
                ep->cm_info.ord = QED_IWARP_ORD_DEFAULT;
                ep->cm_info.ird = QED_IWARP_IRD_DEFAULT;
                ep->mpa_rev = MPA_NEGOTIATION_TYPE_BASIC;
        }

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                   "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x rtr:0x%x ulp_data_len = %x mpa_hdr_size = %x\n",
                   mpa_rev, ep->cm_info.ord, ep->cm_info.ird, ep->rtr_type,
                   async_data->mpa_request.ulp_data_len, mpa_hdr_size);

        /* Strip mpa v2 hdr from private data before sending to upper layer */
        ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_hdr_size;

        ulp_data_len = le16_to_cpu(async_data->mpa_request.ulp_data_len);
        ep->cm_info.private_data_len = ulp_data_len - mpa_hdr_size;

        params.event = QED_IWARP_EVENT_MPA_REQUEST;
        params.cm_info = &ep->cm_info;
        params.ep_context = ep;
        params.status = 0;

        ep->state = QED_IWARP_EP_MPA_REQ_RCVD;
        ep->event_cb(ep->cb_context, &params);
}

static int
qed_iwarp_mpa_offload(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
{
        struct iwarp_mpa_offload_ramrod_data *p_mpa_ramrod;
        struct mpa_outgoing_params *common;
        struct qed_iwarp_info *iwarp_info;
        struct qed_sp_init_data init_data;
        dma_addr_t async_output_phys;
        struct qed_spq_entry *p_ent;
        dma_addr_t out_pdata_phys;
        dma_addr_t in_pdata_phys;
        struct qed_rdma_qp *qp;
        bool reject;
        u32 val;
        int rc;

        if (!ep)
                return -EINVAL;

        qp = ep->qp;
        reject = !qp;

        memset(&init_data, 0, sizeof(init_data));
        init_data.cid = reject ? ep->tcp_cid : qp->icid;
        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;

        if (ep->connect_mode == TCP_CONNECT_ACTIVE)
                init_data.comp_mode = QED_SPQ_MODE_CB;
        else
                init_data.comp_mode = QED_SPQ_MODE_EBLOCK;

        rc = qed_sp_init_request(p_hwfn, &p_ent,
                                 IWARP_RAMROD_CMD_ID_MPA_OFFLOAD,
                                 PROTOCOLID_IWARP, &init_data);
        if (rc)
                return rc;

        p_mpa_ramrod = &p_ent->ramrod.iwarp_mpa_offload;
        common = &p_mpa_ramrod->common;

        out_pdata_phys = ep->ep_buffer_phys +
                         offsetof(struct qed_iwarp_ep_memory, out_pdata);
        DMA_REGPAIR_LE(common->outgoing_ulp_buffer.addr, out_pdata_phys);

        val = ep->cm_info.private_data_len;
        common->outgoing_ulp_buffer.len = cpu_to_le16(val);
        common->crc_needed = p_hwfn->p_rdma_info->iwarp.crc_needed;

        common->out_rq.ord = cpu_to_le32(ep->cm_info.ord);
        common->out_rq.ird = cpu_to_le32(ep->cm_info.ird);

        val = p_hwfn->hw_info.opaque_fid << 16 | ep->tcp_cid;
        p_mpa_ramrod->tcp_cid = cpu_to_le32(val);

        in_pdata_phys = ep->ep_buffer_phys +
                        offsetof(struct qed_iwarp_ep_memory, in_pdata);
        p_mpa_ramrod->tcp_connect_side = ep->connect_mode;
        DMA_REGPAIR_LE(p_mpa_ramrod->incoming_ulp_buffer.addr,
                       in_pdata_phys);
        p_mpa_ramrod->incoming_ulp_buffer.len =
            cpu_to_le16(sizeof(ep->ep_buffer_virt->in_pdata));
        async_output_phys = ep->ep_buffer_phys +
                            offsetof(struct qed_iwarp_ep_memory, async_output);
        DMA_REGPAIR_LE(p_mpa_ramrod->async_eqe_output_buf,
                       async_output_phys);
        p_mpa_ramrod->handle_for_async.hi = cpu_to_le32(PTR_HI(ep));
        p_mpa_ramrod->handle_for_async.lo = cpu_to_le32(PTR_LO(ep));

        if (!reject) {
                DMA_REGPAIR_LE(p_mpa_ramrod->shared_queue_addr,
                               qp->shared_queue_phys_addr);
                p_mpa_ramrod->stats_counter_id =
                    RESC_START(p_hwfn, QED_RDMA_STATS_QUEUE) + qp->stats_queue;
        } else {
                common->reject = 1;
        }

        iwarp_info = &p_hwfn->p_rdma_info->iwarp;
        p_mpa_ramrod->rcv_wnd = cpu_to_le16(iwarp_info->rcv_wnd_size);
        p_mpa_ramrod->mode = ep->mpa_rev;
        SET_FIELD(p_mpa_ramrod->rtr_pref,
                  IWARP_MPA_OFFLOAD_RAMROD_DATA_RTR_SUPPORTED, ep->rtr_type);

        ep->state = QED_IWARP_EP_MPA_OFFLOADED;
        rc = qed_spq_post(p_hwfn, p_ent, NULL);
        if (!reject)
                ep->cid = qp->icid;     /* Now they're migrated. */

        DP_VERBOSE(p_hwfn,
                   QED_MSG_RDMA,
                   "QP(0x%x) EP(0x%x) MPA Offload rc = %d IRD=0x%x ORD=0x%x rtr_type=%d mpa_rev=%d reject=%d\n",
                   reject ? 0xffff : qp->icid,
                   ep->tcp_cid,
                   rc,
                   ep->cm_info.ird,
                   ep->cm_info.ord, ep->rtr_type, ep->mpa_rev, reject);
        return rc;
}

static void
qed_iwarp_return_ep(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
{
        ep->state = QED_IWARP_EP_INIT;
        if (ep->qp)
                ep->qp->ep = NULL;
        ep->qp = NULL;
        memset(&ep->cm_info, 0, sizeof(ep->cm_info));

        if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
                /* We don't care about the return code, it's ok if tcp_cid
                 * remains invalid...in this case we'll defer allocation
                 */
                qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);
        }
        spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);

        list_move_tail(&ep->list_entry,
                       &p_hwfn->p_rdma_info->iwarp.ep_free_list);

        spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
}

static void
qed_iwarp_parse_private_data(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
{
        struct mpa_v2_hdr *mpa_v2_params;
        union async_output *async_data;
        u16 mpa_ird, mpa_ord;
        u8 mpa_data_size = 0;
        u16 ulp_data_len;

        if (MPA_REV2(p_hwfn->p_rdma_info->iwarp.mpa_rev)) {
                mpa_v2_params =
                        (struct mpa_v2_hdr *)(ep->ep_buffer_virt->in_pdata);
                mpa_data_size = sizeof(*mpa_v2_params);
                mpa_ird = ntohs(mpa_v2_params->ird);
                mpa_ord = ntohs(mpa_v2_params->ord);

                ep->cm_info.ird = (u8)(mpa_ord & MPA_V2_IRD_ORD_MASK);
                ep->cm_info.ord = (u8)(mpa_ird & MPA_V2_IRD_ORD_MASK);
        }

        async_data = &ep->ep_buffer_virt->async_output;
        ep->cm_info.private_data = ep->ep_buffer_virt->in_pdata + mpa_data_size;

        ulp_data_len = le16_to_cpu(async_data->mpa_response.ulp_data_len);
        ep->cm_info.private_data_len = ulp_data_len - mpa_data_size;
}

static void
qed_iwarp_mpa_reply_arrived(struct qed_hwfn *p_hwfn, struct qed_iwarp_ep *ep)
{
        struct qed_iwarp_cm_event_params params;

        if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
                DP_NOTICE(p_hwfn,
                          "MPA reply event not expected on passive side!\n");
                return;
        }

        params.event = QED_IWARP_EVENT_ACTIVE_MPA_REPLY;

        qed_iwarp_parse_private_data(p_hwfn, ep);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                   "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
                   ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);

        params.cm_info = &ep->cm_info;
        params.ep_context = ep;
        params.status = 0;

        ep->mpa_reply_processed = true;

        ep->event_cb(ep->cb_context, &params);
}

#define QED_IWARP_CONNECT_MODE_STRING(ep) \
        ((ep)->connect_mode == TCP_CONNECT_PASSIVE) ? "Passive" : "Active"

/* Called as a result of the event:
 * IWARP_EVENT_TYPE_ASYNC_MPA_HANDSHAKE_COMPLETE
 */
static void
qed_iwarp_mpa_complete(struct qed_hwfn *p_hwfn,

                       struct qed_iwarp_ep *ep, u8 fw_return_code)
{
        struct qed_iwarp_cm_event_params params;

        if (ep->connect_mode == TCP_CONNECT_ACTIVE)
                params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
        else
                params.event = QED_IWARP_EVENT_PASSIVE_COMPLETE;

        if (ep->connect_mode == TCP_CONNECT_ACTIVE && !ep->mpa_reply_processed)
                qed_iwarp_parse_private_data(p_hwfn, ep);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                   "MPA_NEGOTIATE (v%d): ORD: 0x%x IRD: 0x%x\n",
                   ep->mpa_rev, ep->cm_info.ord, ep->cm_info.ird);

        params.cm_info = &ep->cm_info;

        params.ep_context = ep;

        switch (fw_return_code) {
        case RDMA_RETURN_OK:
                ep->qp->max_rd_atomic_req = ep->cm_info.ord;
                ep->qp->max_rd_atomic_resp = ep->cm_info.ird;
                qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_RTS, 1);
                ep->state = QED_IWARP_EP_ESTABLISHED;
                params.status = 0;
                break;
        case IWARP_CONN_ERROR_MPA_TIMEOUT:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA timeout\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
                params.status = -EBUSY;
                break;
        case IWARP_CONN_ERROR_MPA_ERROR_REJECT:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA Reject\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
                params.status = -ECONNREFUSED;
                break;
        case IWARP_CONN_ERROR_MPA_RST:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA reset(tcp cid: 0x%x)\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid,
                          ep->tcp_cid);
                params.status = -ECONNRESET;
                break;
        case IWARP_CONN_ERROR_MPA_FIN:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA received FIN\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
                params.status = -ECONNREFUSED;
                break;
        case IWARP_CONN_ERROR_MPA_INSUF_IRD:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA insufficient ird\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
                params.status = -ECONNREFUSED;
                break;
        case IWARP_CONN_ERROR_MPA_RTR_MISMATCH:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA RTR MISMATCH\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
                params.status = -ECONNREFUSED;
                break;
        case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
                params.status = -ECONNREFUSED;
                break;
        case IWARP_CONN_ERROR_MPA_LOCAL_ERROR:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA Local Error\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
                params.status = -ECONNREFUSED;
                break;
        case IWARP_CONN_ERROR_MPA_TERMINATE:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA TERMINATE\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
                params.status = -ECONNREFUSED;
                break;
        default:
                params.status = -ECONNRESET;
                break;
        }

        if (fw_return_code != RDMA_RETURN_OK)
                /* paired with READ_ONCE in destroy_qp */
                smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);

        ep->event_cb(ep->cb_context, &params);

        /* on passive side, if there is no associated QP (REJECT) we need to
         * return the ep to the pool, (in the regular case we add an element
         * in accept instead of this one.
         * In both cases we need to remove it from the ep_list.
         */
        if (fw_return_code != RDMA_RETURN_OK) {
                ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
                if ((ep->connect_mode == TCP_CONNECT_PASSIVE) &&
                    (!ep->qp)) {        /* Rejected */
                        qed_iwarp_return_ep(p_hwfn, ep);
                } else {
                        spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
                        list_del(&ep->list_entry);
                        spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
                }
        }
}

static void
qed_iwarp_mpa_v2_set_private(struct qed_hwfn *p_hwfn,
                             struct qed_iwarp_ep *ep, u8 *mpa_data_size)
{
        struct mpa_v2_hdr *mpa_v2_params;
        u16 mpa_ird, mpa_ord;

        *mpa_data_size = 0;
        if (MPA_REV2(ep->mpa_rev)) {
                mpa_v2_params =
                    (struct mpa_v2_hdr *)ep->ep_buffer_virt->out_pdata;
                *mpa_data_size = sizeof(*mpa_v2_params);

                mpa_ird = (u16)ep->cm_info.ird;
                mpa_ord = (u16)ep->cm_info.ord;

                if (ep->rtr_type != MPA_RTR_TYPE_NONE) {
                        mpa_ird |= MPA_V2_PEER2PEER_MODEL;

                        if (ep->rtr_type & MPA_RTR_TYPE_ZERO_SEND)
                                mpa_ird |= MPA_V2_SEND_RTR;

                        if (ep->rtr_type & MPA_RTR_TYPE_ZERO_WRITE)
                                mpa_ord |= MPA_V2_WRITE_RTR;

                        if (ep->rtr_type & MPA_RTR_TYPE_ZERO_READ)
                                mpa_ord |= MPA_V2_READ_RTR;
                }

                mpa_v2_params->ird = htons(mpa_ird);
                mpa_v2_params->ord = htons(mpa_ord);

                DP_VERBOSE(p_hwfn,
                           QED_MSG_RDMA,
                           "MPA_NEGOTIATE Header: [%x ord:%x ird] %x ord:%x ird:%x peer2peer:%x rtr_send:%x rtr_write:%x rtr_read:%x\n",
                           mpa_v2_params->ird,
                           mpa_v2_params->ord,
                           *((u32 *)mpa_v2_params),
                           mpa_ord & MPA_V2_IRD_ORD_MASK,
                           mpa_ird & MPA_V2_IRD_ORD_MASK,
                           !!(mpa_ird & MPA_V2_PEER2PEER_MODEL),
                           !!(mpa_ird & MPA_V2_SEND_RTR),
                           !!(mpa_ord & MPA_V2_WRITE_RTR),
                           !!(mpa_ord & MPA_V2_READ_RTR));
        }
}

int qed_iwarp_connect(void *rdma_cxt,
                      struct qed_iwarp_connect_in *iparams,
                      struct qed_iwarp_connect_out *oparams)
{
        struct qed_hwfn *p_hwfn = rdma_cxt;
        struct qed_iwarp_info *iwarp_info;
        struct qed_iwarp_ep *ep;
        u8 mpa_data_size = 0;
        u32 cid;
        int rc;

        if ((iparams->cm_info.ord > QED_IWARP_ORD_DEFAULT) ||
            (iparams->cm_info.ird > QED_IWARP_IRD_DEFAULT)) {
                DP_NOTICE(p_hwfn,
                          "QP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
                          iparams->qp->icid, iparams->cm_info.ord,
                          iparams->cm_info.ird);

                return -EINVAL;
        }

        iwarp_info = &p_hwfn->p_rdma_info->iwarp;

        /* Allocate ep object */
        rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
        if (rc)
                return rc;

        rc = qed_iwarp_create_ep(p_hwfn, &ep);
        if (rc)
                goto err;

        ep->tcp_cid = cid;

        spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
        list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
        spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);

        ep->qp = iparams->qp;
        ep->qp->ep = ep;
        ether_addr_copy(ep->remote_mac_addr, iparams->remote_mac_addr);
        ether_addr_copy(ep->local_mac_addr, iparams->local_mac_addr);
        memcpy(&ep->cm_info, &iparams->cm_info, sizeof(ep->cm_info));

        ep->cm_info.ord = iparams->cm_info.ord;
        ep->cm_info.ird = iparams->cm_info.ird;

        ep->rtr_type = iwarp_info->rtr_type;
        if (!iwarp_info->peer2peer)
                ep->rtr_type = MPA_RTR_TYPE_NONE;

        if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) && (ep->cm_info.ord == 0))
                ep->cm_info.ord = 1;

        ep->mpa_rev = iwarp_info->mpa_rev;

        qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);

        ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
        ep->cm_info.private_data_len = iparams->cm_info.private_data_len +
                                       mpa_data_size;

        memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
               iparams->cm_info.private_data,
               iparams->cm_info.private_data_len);

        ep->mss = iparams->mss;
        ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);

        ep->event_cb = iparams->event_cb;
        ep->cb_context = iparams->cb_context;
        ep->connect_mode = TCP_CONNECT_ACTIVE;

        oparams->ep_context = ep;

        rc = qed_iwarp_tcp_offload(p_hwfn, ep);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x) rc = %d\n",
                   iparams->qp->icid, ep->tcp_cid, rc);

        if (rc) {
                qed_iwarp_destroy_ep(p_hwfn, ep, true);
                goto err;
        }

        return rc;
err:
        qed_iwarp_cid_cleaned(p_hwfn, cid);

        return rc;
}

static struct qed_iwarp_ep *qed_iwarp_get_free_ep(struct qed_hwfn *p_hwfn)
{
        struct qed_iwarp_ep *ep = NULL;
        int rc;

        spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);

        if (list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
                DP_ERR(p_hwfn, "Ep list is empty\n");
                goto out;
        }

        ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
                              struct qed_iwarp_ep, list_entry);

        /* in some cases we could have failed allocating a tcp cid when added
         * from accept / failure... retry now..this is not the common case.
         */
        if (ep->tcp_cid == QED_IWARP_INVALID_TCP_CID) {
                rc = qed_iwarp_alloc_tcp_cid(p_hwfn, &ep->tcp_cid);

                /* if we fail we could look for another entry with a valid
                 * tcp_cid, but since we don't expect to reach this anyway
                 * it's not worth the handling
                 */
                if (rc) {
                        ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
                        ep = NULL;
                        goto out;
                }
        }

        list_del(&ep->list_entry);

out:
        spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
        return ep;
}

#define QED_IWARP_MAX_CID_CLEAN_TIME  100
#define QED_IWARP_MAX_NO_PROGRESS_CNT 5

/* This function waits for all the bits of a bmap to be cleared, as long as
 * there is progress ( i.e. the number of bits left to be cleared decreases )
 * the function continues.
 */
static int
qed_iwarp_wait_cid_map_cleared(struct qed_hwfn *p_hwfn, struct qed_bmap *bmap)
{
        int prev_weight = 0;
        int wait_count = 0;
        int weight = 0;

        weight = bitmap_weight(bmap->bitmap, bmap->max_count);
        prev_weight = weight;

        while (weight) {
                msleep(QED_IWARP_MAX_CID_CLEAN_TIME);

                weight = bitmap_weight(bmap->bitmap, bmap->max_count);

                if (prev_weight == weight) {
                        wait_count++;
                } else {
                        prev_weight = weight;
                        wait_count = 0;
                }

                if (wait_count > QED_IWARP_MAX_NO_PROGRESS_CNT) {
                        DP_NOTICE(p_hwfn,
                                  "%s bitmap wait timed out (%d cids pending)\n",
                                  bmap->name, weight);
                        return -EBUSY;
                }
        }
        return 0;
}

static int qed_iwarp_wait_for_all_cids(struct qed_hwfn *p_hwfn)
{
        int rc;
        int i;

        rc = qed_iwarp_wait_cid_map_cleared(p_hwfn,
                                            &p_hwfn->p_rdma_info->tcp_cid_map);
        if (rc)
                return rc;

        /* Now free the tcp cids from the main cid map */
        for (i = 0; i < QED_IWARP_PREALLOC_CNT; i++)
                qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->cid_map, i);

        /* Now wait for all cids to be completed */
        return qed_iwarp_wait_cid_map_cleared(p_hwfn,
                                              &p_hwfn->p_rdma_info->cid_map);
}

static void qed_iwarp_free_prealloc_ep(struct qed_hwfn *p_hwfn)
{
        struct qed_iwarp_ep *ep;

        while (!list_empty(&p_hwfn->p_rdma_info->iwarp.ep_free_list)) {
                spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);

                ep = list_first_entry(&p_hwfn->p_rdma_info->iwarp.ep_free_list,
                                      struct qed_iwarp_ep, list_entry);

                if (!ep) {
                        spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
                        break;
                }
                list_del(&ep->list_entry);

                spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);

                if (ep->tcp_cid != QED_IWARP_INVALID_TCP_CID)
                        qed_iwarp_cid_cleaned(p_hwfn, ep->tcp_cid);

                qed_iwarp_destroy_ep(p_hwfn, ep, false);
        }
}

static int qed_iwarp_prealloc_ep(struct qed_hwfn *p_hwfn, bool init)
{
        struct qed_iwarp_ep *ep;
        int rc = 0;
        int count;
        u32 cid;
        int i;

        count = init ? QED_IWARP_PREALLOC_CNT : 1;
        for (i = 0; i < count; i++) {
                rc = qed_iwarp_create_ep(p_hwfn, &ep);
                if (rc)
                        return rc;

                /* During initialization we allocate from the main pool,
                 * afterwards we allocate only from the tcp_cid.
                 */
                if (init) {
                        rc = qed_iwarp_alloc_cid(p_hwfn, &cid);
                        if (rc)
                                goto err;
                        qed_iwarp_set_tcp_cid(p_hwfn, cid);
                } else {
                        /* We don't care about the return code, it's ok if
                         * tcp_cid remains invalid...in this case we'll
                         * defer allocation
                         */
                        qed_iwarp_alloc_tcp_cid(p_hwfn, &cid);
                }

                ep->tcp_cid = cid;

                spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
                list_add_tail(&ep->list_entry,
                              &p_hwfn->p_rdma_info->iwarp.ep_free_list);
                spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
        }

        return rc;

err:
        qed_iwarp_destroy_ep(p_hwfn, ep, false);

        return rc;
}

int qed_iwarp_alloc(struct qed_hwfn *p_hwfn)
{
        int rc;

        /* Allocate bitmap for tcp cid. These are used by passive side
         * to ensure it can allocate a tcp cid during dpc that was
         * pre-acquired and doesn't require dynamic allocation of ilt
         */
        rc = qed_rdma_bmap_alloc(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map,
                                 QED_IWARP_PREALLOC_CNT, "TCP_CID");
        if (rc) {
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "Failed to allocate tcp cid, rc = %d\n", rc);
                return rc;
        }

        INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_free_list);
        spin_lock_init(&p_hwfn->p_rdma_info->iwarp.iw_lock);

        rc = qed_iwarp_prealloc_ep(p_hwfn, true);
        if (rc)
                return rc;

        return qed_ooo_alloc(p_hwfn);
}

void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn)
{
        struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;

        qed_ooo_free(p_hwfn);
        qed_rdma_bmap_free(p_hwfn, &p_hwfn->p_rdma_info->tcp_cid_map, 1);
        kfree(iwarp_info->mpa_bufs);
        kfree(iwarp_info->partial_fpdus);
        kfree(iwarp_info->mpa_intermediate_buf);
}

int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams)
{
        struct qed_hwfn *p_hwfn = rdma_cxt;
        struct qed_iwarp_ep *ep;
        u8 mpa_data_size = 0;
        int rc;

        ep = iparams->ep_context;
        if (!ep) {
                DP_ERR(p_hwfn, "Ep Context receive in accept is NULL\n");
                return -EINVAL;
        }

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "QP(0x%x) EP(0x%x)\n",
                   iparams->qp->icid, ep->tcp_cid);

        if ((iparams->ord > QED_IWARP_ORD_DEFAULT) ||
            (iparams->ird > QED_IWARP_IRD_DEFAULT)) {
                DP_VERBOSE(p_hwfn,
                           QED_MSG_RDMA,
                           "QP(0x%x) EP(0x%x) ERROR: Invalid ord(0x%x)/ird(0x%x)\n",
                           iparams->qp->icid,
                           ep->tcp_cid, iparams->ord, iparams->ord);
                return -EINVAL;
        }

        qed_iwarp_prealloc_ep(p_hwfn, false);

        ep->cb_context = iparams->cb_context;
        ep->qp = iparams->qp;
        ep->qp->ep = ep;

        if (ep->mpa_rev == MPA_NEGOTIATION_TYPE_ENHANCED) {
                /* Negotiate ord/ird: if upperlayer requested ord larger than
                 * ird advertised by remote, we need to decrease our ord
                 */
                if (iparams->ord > ep->cm_info.ird)
                        iparams->ord = ep->cm_info.ird;

                if ((ep->rtr_type & MPA_RTR_TYPE_ZERO_READ) &&
                    (iparams->ird == 0))
                        iparams->ird = 1;
        }

        /* Update cm_info ord/ird to be negotiated values */
        ep->cm_info.ord = iparams->ord;
        ep->cm_info.ird = iparams->ird;

        qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);

        ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
        ep->cm_info.private_data_len = iparams->private_data_len +
                                       mpa_data_size;

        memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
               iparams->private_data, iparams->private_data_len);

        rc = qed_iwarp_mpa_offload(p_hwfn, ep);
        if (rc)
                qed_iwarp_modify_qp(p_hwfn,
                                    iparams->qp, QED_IWARP_QP_STATE_ERROR, 1);

        return rc;
}

int qed_iwarp_reject(void *rdma_cxt, struct qed_iwarp_reject_in *iparams)
{
        struct qed_hwfn *p_hwfn = rdma_cxt;
        struct qed_iwarp_ep *ep;
        u8 mpa_data_size = 0;

        ep = iparams->ep_context;
        if (!ep) {
                DP_ERR(p_hwfn, "Ep Context receive in reject is NULL\n");
                return -EINVAL;
        }

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x)\n", ep->tcp_cid);

        ep->cb_context = iparams->cb_context;
        ep->qp = NULL;

        qed_iwarp_mpa_v2_set_private(p_hwfn, ep, &mpa_data_size);

        ep->cm_info.private_data = ep->ep_buffer_virt->out_pdata;
        ep->cm_info.private_data_len = iparams->private_data_len +
                                       mpa_data_size;

        memcpy((u8 *)ep->ep_buffer_virt->out_pdata + mpa_data_size,
               iparams->private_data, iparams->private_data_len);

        return qed_iwarp_mpa_offload(p_hwfn, ep);
}

static void
qed_iwarp_print_cm_info(struct qed_hwfn *p_hwfn,
                        struct qed_iwarp_cm_info *cm_info)
{
        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "ip_version = %d\n",
                   cm_info->ip_version);

        if (cm_info->ip_version == QED_TCP_IPV4)
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "remote_ip %pI4h:%x, local_ip %pI4h:%x vlan=%x\n",
                           cm_info->remote_ip, cm_info->remote_port,
                           cm_info->local_ip, cm_info->local_port,
                           cm_info->vlan);
        else
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "remote_ip %pI6:%x, local_ip %pI6:%x vlan=%x\n",
                           cm_info->remote_ip, cm_info->remote_port,
                           cm_info->local_ip, cm_info->local_port,
                           cm_info->vlan);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                   "private_data_len = %x ord = %d, ird = %d\n",
                   cm_info->private_data_len, cm_info->ord, cm_info->ird);
}

static int
qed_iwarp_ll2_post_rx(struct qed_hwfn *p_hwfn,
                      struct qed_iwarp_ll2_buff *buf, u8 handle)
{
        int rc;

        rc = qed_ll2_post_rx_buffer(p_hwfn, handle, buf->data_phys_addr,
                                    (u16)buf->buff_size, buf, 1);
        if (rc) {
                DP_NOTICE(p_hwfn,
                          "Failed to repost rx buffer to ll2 rc = %d, handle=%d\n",
                          rc, handle);
                dma_free_coherent(&p_hwfn->cdev->pdev->dev, buf->buff_size,
                                  buf->data, buf->data_phys_addr);
                kfree(buf);
        }

        return rc;
}

static bool
qed_iwarp_ep_exists(struct qed_hwfn *p_hwfn, struct qed_iwarp_cm_info *cm_info)
{
        struct qed_iwarp_ep *ep = NULL;
        bool found = false;

        list_for_each_entry(ep,
                            &p_hwfn->p_rdma_info->iwarp.ep_list,
                            list_entry) {
                if ((ep->cm_info.local_port == cm_info->local_port) &&
                    (ep->cm_info.remote_port == cm_info->remote_port) &&
                    (ep->cm_info.vlan == cm_info->vlan) &&
                    !memcmp(&ep->cm_info.local_ip, cm_info->local_ip,
                            sizeof(cm_info->local_ip)) &&
                    !memcmp(&ep->cm_info.remote_ip, cm_info->remote_ip,
                            sizeof(cm_info->remote_ip))) {
                        found = true;
                        break;
                }
        }

        if (found) {
                DP_NOTICE(p_hwfn,
                          "SYN received on active connection - dropping\n");
                qed_iwarp_print_cm_info(p_hwfn, cm_info);

                return true;
        }

        return false;
}

static struct qed_iwarp_listener *
qed_iwarp_get_listener(struct qed_hwfn *p_hwfn,
                       struct qed_iwarp_cm_info *cm_info)
{
        struct qed_iwarp_listener *listener = NULL;
        static const u32 ip_zero[4] = { 0, 0, 0, 0 };
        bool found = false;

        qed_iwarp_print_cm_info(p_hwfn, cm_info);

        list_for_each_entry(listener,
                            &p_hwfn->p_rdma_info->iwarp.listen_list,
                            list_entry) {
                if (listener->port == cm_info->local_port) {
                        if (!memcmp(listener->ip_addr,
                                    ip_zero, sizeof(ip_zero))) {
                                found = true;
                                break;
                        }

                        if (!memcmp(listener->ip_addr,
                                    cm_info->local_ip,
                                    sizeof(cm_info->local_ip)) &&
                            (listener->vlan == cm_info->vlan)) {
                                found = true;
                                break;
                        }
                }
        }

        if (found) {
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener found = %p\n",
                           listener);
                return listener;
        }

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "listener not found\n");
        return NULL;
}

static int
qed_iwarp_parse_rx_pkt(struct qed_hwfn *p_hwfn,
                       struct qed_iwarp_cm_info *cm_info,
                       void *buf,
                       u8 *remote_mac_addr,
                       u8 *local_mac_addr,
                       int *payload_len, int *tcp_start_offset)
{
        struct vlan_ethhdr *vethh;
        bool vlan_valid = false;
        struct ipv6hdr *ip6h;
        struct ethhdr *ethh;
        struct tcphdr *tcph;
        struct iphdr *iph;
        int eth_hlen;
        int ip_hlen;
        int eth_type;
        int i;

        ethh = buf;
        eth_type = ntohs(ethh->h_proto);
        if (eth_type == ETH_P_8021Q) {
                vlan_valid = true;
                vethh = (struct vlan_ethhdr *)ethh;
                cm_info->vlan = ntohs(vethh->h_vlan_TCI) & VLAN_VID_MASK;
                eth_type = ntohs(vethh->h_vlan_encapsulated_proto);
        }

        eth_hlen = ETH_HLEN + (vlan_valid ? sizeof(u32) : 0);

        if (!ether_addr_equal(ethh->h_dest,
                              p_hwfn->p_rdma_info->iwarp.mac_addr)) {
                DP_VERBOSE(p_hwfn,
                           QED_MSG_RDMA,
                           "Got unexpected mac %pM instead of %pM\n",
                           ethh->h_dest, p_hwfn->p_rdma_info->iwarp.mac_addr);
                return -EINVAL;
        }

        ether_addr_copy(remote_mac_addr, ethh->h_source);
        ether_addr_copy(local_mac_addr, ethh->h_dest);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_type =%d source mac: %pM\n",
                   eth_type, ethh->h_source);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "eth_hlen=%d destination mac: %pM\n",
                   eth_hlen, ethh->h_dest);

        iph = (struct iphdr *)((u8 *)(ethh) + eth_hlen);

        if (eth_type == ETH_P_IP) {
                if (iph->protocol != IPPROTO_TCP) {
                        DP_NOTICE(p_hwfn,
                                  "Unexpected ip protocol on ll2 %x\n",
                                  iph->protocol);
                        return -EINVAL;
                }

                cm_info->local_ip[0] = ntohl(iph->daddr);
                cm_info->remote_ip[0] = ntohl(iph->saddr);
                cm_info->ip_version = QED_TCP_IPV4;

                ip_hlen = (iph->ihl) * sizeof(u32);
                *payload_len = ntohs(iph->tot_len) - ip_hlen;
        } else if (eth_type == ETH_P_IPV6) {
                ip6h = (struct ipv6hdr *)iph;

                if (ip6h->nexthdr != IPPROTO_TCP) {
                        DP_NOTICE(p_hwfn,
                                  "Unexpected ip protocol on ll2 %x\n",
                                  iph->protocol);
                        return -EINVAL;
                }

                for (i = 0; i < 4; i++) {
                        cm_info->local_ip[i] =
                            ntohl(ip6h->daddr.in6_u.u6_addr32[i]);
                        cm_info->remote_ip[i] =
                            ntohl(ip6h->saddr.in6_u.u6_addr32[i]);
                }
                cm_info->ip_version = QED_TCP_IPV6;

                ip_hlen = sizeof(*ip6h);
                *payload_len = ntohs(ip6h->payload_len);
        } else {
                DP_NOTICE(p_hwfn, "Unexpected ethertype on ll2 %x\n", eth_type);
                return -EINVAL;
        }

        tcph = (struct tcphdr *)((u8 *)iph + ip_hlen);

        if (!tcph->syn) {
                DP_NOTICE(p_hwfn,
                          "Only SYN type packet expected on this ll2 conn, iph->ihl=%d source=%d dest=%d\n",
                          iph->ihl, tcph->source, tcph->dest);
                return -EINVAL;
        }

        cm_info->local_port = ntohs(tcph->dest);
        cm_info->remote_port = ntohs(tcph->source);

        qed_iwarp_print_cm_info(p_hwfn, cm_info);

        *tcp_start_offset = eth_hlen + ip_hlen;

        return 0;
}

static struct qed_iwarp_fpdu *qed_iwarp_get_curr_fpdu(struct qed_hwfn *p_hwfn,
                                                      u16 cid)
{
        struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
        struct qed_iwarp_fpdu *partial_fpdu;
        u32 idx;

        idx = cid - qed_cxt_get_proto_cid_start(p_hwfn, PROTOCOLID_IWARP);
        if (idx >= iwarp_info->max_num_partial_fpdus) {
                DP_ERR(p_hwfn, "Invalid cid %x max_num_partial_fpdus=%x\n", cid,
                       iwarp_info->max_num_partial_fpdus);
                return NULL;
        }

        partial_fpdu = &iwarp_info->partial_fpdus[idx];

        return partial_fpdu;
}

enum qed_iwarp_mpa_pkt_type {
        QED_IWARP_MPA_PKT_PACKED,
        QED_IWARP_MPA_PKT_PARTIAL,
        QED_IWARP_MPA_PKT_UNALIGNED
};

#define QED_IWARP_INVALID_FPDU_LENGTH 0xffff
#define QED_IWARP_MPA_FPDU_LENGTH_SIZE (2)
#define QED_IWARP_MPA_CRC32_DIGEST_SIZE (4)

/* Pad to multiple of 4 */
#define QED_IWARP_PDU_DATA_LEN_WITH_PAD(data_len) ALIGN(data_len, 4)
#define QED_IWARP_FPDU_LEN_WITH_PAD(_mpa_len)                              \
        (QED_IWARP_PDU_DATA_LEN_WITH_PAD((_mpa_len) +                      \
                                         QED_IWARP_MPA_FPDU_LENGTH_SIZE) + \
                                         QED_IWARP_MPA_CRC32_DIGEST_SIZE)

/* fpdu can be fragmented over maximum 3 bds: header, partial mpa, unaligned */
#define QED_IWARP_MAX_BDS_PER_FPDU 3

static const char * const pkt_type_str[] = {
        "QED_IWARP_MPA_PKT_PACKED",
        "QED_IWARP_MPA_PKT_PARTIAL",
        "QED_IWARP_MPA_PKT_UNALIGNED"
};

static int
qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
                      struct qed_iwarp_fpdu *fpdu,
                      struct qed_iwarp_ll2_buff *buf);

static enum qed_iwarp_mpa_pkt_type
qed_iwarp_mpa_classify(struct qed_hwfn *p_hwfn,
                       struct qed_iwarp_fpdu *fpdu,
                       u16 tcp_payload_len, u8 *mpa_data)
{
        enum qed_iwarp_mpa_pkt_type pkt_type;
        u16 mpa_len;

        if (fpdu->incomplete_bytes) {
                pkt_type = QED_IWARP_MPA_PKT_UNALIGNED;
                goto out;
        }

        /* special case of one byte remaining...
         * lower byte will be read next packet
         */
        if (tcp_payload_len == 1) {
                fpdu->fpdu_length = *mpa_data << BITS_PER_BYTE;
                pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
                goto out;
        }

        mpa_len = ntohs(*(__force __be16 *)mpa_data);
        fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);

        if (fpdu->fpdu_length <= tcp_payload_len)
                pkt_type = QED_IWARP_MPA_PKT_PACKED;
        else
                pkt_type = QED_IWARP_MPA_PKT_PARTIAL;

out:
        DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                   "MPA_ALIGN: %s: fpdu_length=0x%x tcp_payload_len:0x%x\n",
                   pkt_type_str[pkt_type], fpdu->fpdu_length, tcp_payload_len);

        return pkt_type;
}

static void
qed_iwarp_init_fpdu(struct qed_iwarp_ll2_buff *buf,
                    struct qed_iwarp_fpdu *fpdu,
                    struct unaligned_opaque_data *pkt_data,
                    u16 tcp_payload_size, u8 placement_offset)
{
        u16 first_mpa_offset = le16_to_cpu(pkt_data->first_mpa_offset);

        fpdu->mpa_buf = buf;
        fpdu->pkt_hdr = buf->data_phys_addr + placement_offset;
        fpdu->pkt_hdr_size = pkt_data->tcp_payload_offset;
        fpdu->mpa_frag = buf->data_phys_addr + first_mpa_offset;
        fpdu->mpa_frag_virt = (u8 *)(buf->data) + first_mpa_offset;

        if (tcp_payload_size == 1)
                fpdu->incomplete_bytes = QED_IWARP_INVALID_FPDU_LENGTH;
        else if (tcp_payload_size < fpdu->fpdu_length)
                fpdu->incomplete_bytes = fpdu->fpdu_length - tcp_payload_size;
        else
                fpdu->incomplete_bytes = 0;     /* complete fpdu */

        fpdu->mpa_frag_len = fpdu->fpdu_length - fpdu->incomplete_bytes;
}

static int
qed_iwarp_cp_pkt(struct qed_hwfn *p_hwfn,
                 struct qed_iwarp_fpdu *fpdu,
                 struct unaligned_opaque_data *pkt_data,
                 struct qed_iwarp_ll2_buff *buf, u16 tcp_payload_size)
{
        u16 first_mpa_offset = le16_to_cpu(pkt_data->first_mpa_offset);
        u8 *tmp_buf = p_hwfn->p_rdma_info->iwarp.mpa_intermediate_buf;
        int rc;

        /* need to copy the data from the partial packet stored in fpdu
         * to the new buf, for this we also need to move the data currently
         * placed on the buf. The assumption is that the buffer is big enough
         * since fpdu_length <= mss, we use an intermediate buffer since
         * we may need to copy the new data to an overlapping location
         */
        if ((fpdu->mpa_frag_len + tcp_payload_size) > (u16)buf->buff_size) {
                DP_ERR(p_hwfn,
                       "MPA ALIGN: Unexpected: buffer is not large enough for split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n",
                       buf->buff_size, fpdu->mpa_frag_len,
                       tcp_payload_size, fpdu->incomplete_bytes);
                return -EINVAL;
        }

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                   "MPA ALIGN Copying fpdu: [%p, %d] [%p, %d]\n",
                   fpdu->mpa_frag_virt, fpdu->mpa_frag_len,
                   (u8 *)(buf->data) + first_mpa_offset, tcp_payload_size);

        memcpy(tmp_buf, fpdu->mpa_frag_virt, fpdu->mpa_frag_len);
        memcpy(tmp_buf + fpdu->mpa_frag_len,
               (u8 *)(buf->data) + first_mpa_offset, tcp_payload_size);

        rc = qed_iwarp_recycle_pkt(p_hwfn, fpdu, fpdu->mpa_buf);
        if (rc)
                return rc;

        /* If we managed to post the buffer copy the data to the new buffer
         * o/w this will occur in the next round...
         */
        memcpy((u8 *)(buf->data), tmp_buf,
               fpdu->mpa_frag_len + tcp_payload_size);

        fpdu->mpa_buf = buf;
        /* fpdu->pkt_hdr remains as is */
        /* fpdu->mpa_frag is overridden with new buf */
        fpdu->mpa_frag = buf->data_phys_addr;
        fpdu->mpa_frag_virt = buf->data;
        fpdu->mpa_frag_len += tcp_payload_size;

        fpdu->incomplete_bytes -= tcp_payload_size;

        DP_VERBOSE(p_hwfn,
                   QED_MSG_RDMA,
                   "MPA ALIGN: split fpdu buff_size = %d mpa_frag_len = %d, tcp_payload_size = %d, incomplete_bytes = %d\n",
                   buf->buff_size, fpdu->mpa_frag_len, tcp_payload_size,
                   fpdu->incomplete_bytes);

        return 0;
}

static void
qed_iwarp_update_fpdu_length(struct qed_hwfn *p_hwfn,
                             struct qed_iwarp_fpdu *fpdu, u8 *mpa_data)
{
        u16 mpa_len;

        /* Update incomplete packets if needed */
        if (fpdu->incomplete_bytes == QED_IWARP_INVALID_FPDU_LENGTH) {
                /* Missing lower byte is now available */
                mpa_len = fpdu->fpdu_length | *mpa_data;
                fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
                /* one byte of hdr */
                fpdu->mpa_frag_len = 1;
                fpdu->incomplete_bytes = fpdu->fpdu_length - 1;
                DP_VERBOSE(p_hwfn,
                           QED_MSG_RDMA,
                           "MPA_ALIGN: Partial header mpa_len=%x fpdu_length=%x incomplete_bytes=%x\n",
                           mpa_len, fpdu->fpdu_length, fpdu->incomplete_bytes);
        }
}

#define QED_IWARP_IS_RIGHT_EDGE(_curr_pkt) \
        (GET_FIELD((_curr_pkt)->flags,     \
                   UNALIGNED_OPAQUE_DATA_PKT_REACHED_WIN_RIGHT_EDGE))

/* This function is used to recycle a buffer using the ll2 drop option. It
 * uses the mechanism to ensure that all buffers posted to tx before this one
 * were completed. The buffer sent here will be sent as a cookie in the tx
 * completion function and can then be reposted to rx chain when done. The flow
 * that requires this is the flow where a FPDU splits over more than 3 tcp
 * segments. In this case the driver needs to re-post a rx buffer instead of
 * the one received, but driver can't simply repost a buffer it copied from
 * as there is a case where the buffer was originally a packed FPDU, and is
 * partially posted to FW. Driver needs to ensure FW is done with it.
 */
static int
qed_iwarp_recycle_pkt(struct qed_hwfn *p_hwfn,
                      struct qed_iwarp_fpdu *fpdu,
                      struct qed_iwarp_ll2_buff *buf)
{
        struct qed_ll2_tx_pkt_info tx_pkt;
        u8 ll2_handle;
        int rc;

        memset(&tx_pkt, 0, sizeof(tx_pkt));
        tx_pkt.num_of_bds = 1;
        tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
        tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;
        tx_pkt.first_frag = fpdu->pkt_hdr;
        tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
        buf->piggy_buf = NULL;
        tx_pkt.cookie = buf;

        ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;

        rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
        if (rc)
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "Can't drop packet rc=%d\n", rc);

        DP_VERBOSE(p_hwfn,

                   QED_MSG_RDMA,
                   "MPA_ALIGN: send drop tx packet [%lx, 0x%x], buf=%p, rc=%d\n",
                   (unsigned long int)tx_pkt.first_frag,
                   tx_pkt.first_frag_len, buf, rc);

        return rc;
}

static int
qed_iwarp_win_right_edge(struct qed_hwfn *p_hwfn, struct qed_iwarp_fpdu *fpdu)
{
        struct qed_ll2_tx_pkt_info tx_pkt;
        u8 ll2_handle;
        int rc;

        memset(&tx_pkt, 0, sizeof(tx_pkt));
        tx_pkt.num_of_bds = 1;
        tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
        tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2;

        tx_pkt.first_frag = fpdu->pkt_hdr;
        tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
        tx_pkt.enable_ip_cksum = true;
        tx_pkt.enable_l4_cksum = true;
        tx_pkt.calc_ip_len = true;
        /* vlan overload with enum iwarp_ll2_tx_queues */
        tx_pkt.vlan = IWARP_LL2_ALIGNED_RIGHT_TRIMMED_TX_QUEUE;

        ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;

        rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
        if (rc)
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "Can't send right edge rc=%d\n", rc);
        DP_VERBOSE(p_hwfn,
                   QED_MSG_RDMA,
                   "MPA_ALIGN: Sent right edge FPDU num_bds=%d [%lx, 0x%x], rc=%d\n",
                   tx_pkt.num_of_bds,
                   (unsigned long int)tx_pkt.first_frag,
                   tx_pkt.first_frag_len, rc);

        return rc;
}

static int
qed_iwarp_send_fpdu(struct qed_hwfn *p_hwfn,
                    struct qed_iwarp_fpdu *fpdu,
                    struct unaligned_opaque_data *curr_pkt,
                    struct qed_iwarp_ll2_buff *buf,
                    u16 tcp_payload_size, enum qed_iwarp_mpa_pkt_type pkt_type)
{
        struct qed_ll2_tx_pkt_info tx_pkt;
        u16 first_mpa_offset;
        u8 ll2_handle;
        int rc;

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

        /* An unaligned packet means it's split over two tcp segments. So the
         * complete packet requires 3 bds, one for the header, one for the
         * part of the fpdu of the first tcp segment, and the last fragment
         * will point to the remainder of the fpdu. A packed pdu, requires only
         * two bds, one for the header and one for the data.
         */
        tx_pkt.num_of_bds = (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED) ? 3 : 2;
        tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
        tx_pkt.l4_hdr_offset_w = fpdu->pkt_hdr_size >> 2; /* offset in words */

        /* Send the mpa_buf only with the last fpdu (in case of packed) */
        if (pkt_type == QED_IWARP_MPA_PKT_UNALIGNED ||
            tcp_payload_size <= fpdu->fpdu_length)
                tx_pkt.cookie = fpdu->mpa_buf;

        tx_pkt.first_frag = fpdu->pkt_hdr;
        tx_pkt.first_frag_len = fpdu->pkt_hdr_size;
        tx_pkt.enable_ip_cksum = true;
        tx_pkt.enable_l4_cksum = true;
        tx_pkt.calc_ip_len = true;
        /* vlan overload with enum iwarp_ll2_tx_queues */
        tx_pkt.vlan = IWARP_LL2_ALIGNED_TX_QUEUE;

        /* special case of unaligned packet and not packed, need to send
         * both buffers as cookie to release.
         */
        if (tcp_payload_size == fpdu->incomplete_bytes)
                fpdu->mpa_buf->piggy_buf = buf;

        ll2_handle = p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle;

        /* Set first fragment to header */
        rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_handle, &tx_pkt, true);
        if (rc)
                goto out;

        /* Set second fragment to first part of packet */
        rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn, ll2_handle,
                                               fpdu->mpa_frag,
                                               fpdu->mpa_frag_len);
        if (rc)
                goto out;

        if (!fpdu->incomplete_bytes)
                goto out;

        first_mpa_offset = le16_to_cpu(curr_pkt->first_mpa_offset);

        /* Set third fragment to second part of the packet */
        rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
                                               ll2_handle,
                                               buf->data_phys_addr +
                                               first_mpa_offset,
                                               fpdu->incomplete_bytes);
out:
        DP_VERBOSE(p_hwfn,
                   QED_MSG_RDMA,
                   "MPA_ALIGN: Sent FPDU num_bds=%d first_frag_len=%x, mpa_frag_len=0x%x, incomplete_bytes:0x%x rc=%d\n",
                   tx_pkt.num_of_bds,
                   tx_pkt.first_frag_len,
                   fpdu->mpa_frag_len,
                   fpdu->incomplete_bytes, rc);

        return rc;
}

static void
qed_iwarp_mpa_get_data(struct qed_hwfn *p_hwfn,
                       struct unaligned_opaque_data *curr_pkt,
                       u32 opaque_data0, u32 opaque_data1)
{
        u64 opaque_data;

        opaque_data = HILO_64(cpu_to_le32(opaque_data1),
                              cpu_to_le32(opaque_data0));
        *curr_pkt = *((struct unaligned_opaque_data *)&opaque_data);

        le16_add_cpu(&curr_pkt->first_mpa_offset,
                     curr_pkt->tcp_payload_offset);
}

/* This function is called when an unaligned or incomplete MPA packet arrives
 * driver needs to align the packet, perhaps using previous data and send
 * it down to FW once it is aligned.
 */
static int
qed_iwarp_process_mpa_pkt(struct qed_hwfn *p_hwfn,
                          struct qed_iwarp_ll2_mpa_buf *mpa_buf)
{
        struct unaligned_opaque_data *curr_pkt = &mpa_buf->data;
        struct qed_iwarp_ll2_buff *buf = mpa_buf->ll2_buf;
        enum qed_iwarp_mpa_pkt_type pkt_type;
        struct qed_iwarp_fpdu *fpdu;
        u16 cid, first_mpa_offset;
        int rc = -EINVAL;
        u8 *mpa_data;

        cid = le32_to_cpu(curr_pkt->cid);

        fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, (u16)cid);
        if (!fpdu) { /* something corrupt with cid, post rx back */
                DP_ERR(p_hwfn, "Invalid cid, drop and post back to rx cid=%x\n",
                       cid);
                goto err;
        }

        do {
                first_mpa_offset = le16_to_cpu(curr_pkt->first_mpa_offset);
                mpa_data = ((u8 *)(buf->data) + first_mpa_offset);

                pkt_type = qed_iwarp_mpa_classify(p_hwfn, fpdu,
                                                  mpa_buf->tcp_payload_len,
                                                  mpa_data);

                switch (pkt_type) {
                case QED_IWARP_MPA_PKT_PARTIAL:
                        qed_iwarp_init_fpdu(buf, fpdu,
                                            curr_pkt,
                                            mpa_buf->tcp_payload_len,
                                            mpa_buf->placement_offset);

                        if (!QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
                                mpa_buf->tcp_payload_len = 0;
                                break;
                        }

                        rc = qed_iwarp_win_right_edge(p_hwfn, fpdu);

                        if (rc) {
                                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                                           "Can't send FPDU:reset rc=%d\n", rc);
                                memset(fpdu, 0, sizeof(*fpdu));
                                break;
                        }

                        mpa_buf->tcp_payload_len = 0;
                        break;
                case QED_IWARP_MPA_PKT_PACKED:
                        qed_iwarp_init_fpdu(buf, fpdu,
                                            curr_pkt,
                                            mpa_buf->tcp_payload_len,
                                            mpa_buf->placement_offset);

                        rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
                                                 mpa_buf->tcp_payload_len,
                                                 pkt_type);
                        if (rc) {
                                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                                           "Can't send FPDU:reset rc=%d\n", rc);
                                memset(fpdu, 0, sizeof(*fpdu));
                                break;
                        }

                        mpa_buf->tcp_payload_len -= fpdu->fpdu_length;
                        le16_add_cpu(&curr_pkt->first_mpa_offset,
                                     fpdu->fpdu_length);
                        break;
                case QED_IWARP_MPA_PKT_UNALIGNED:
                        qed_iwarp_update_fpdu_length(p_hwfn, fpdu, mpa_data);
                        if (mpa_buf->tcp_payload_len < fpdu->incomplete_bytes) {
                                /* special handling of fpdu split over more
                                 * than 2 segments
                                 */
                                if (QED_IWARP_IS_RIGHT_EDGE(curr_pkt)) {
                                        rc = qed_iwarp_win_right_edge(p_hwfn,
                                                                      fpdu);
                                        /* packet will be re-processed later */
                                        if (rc)
                                                return rc;
                                }

                                rc = qed_iwarp_cp_pkt(p_hwfn, fpdu, curr_pkt,
                                                      buf,
                                                      mpa_buf->tcp_payload_len);
                                if (rc) /* packet will be re-processed later */
                                        return rc;

                                mpa_buf->tcp_payload_len = 0;
                                break;
                        }

                        rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
                                                 mpa_buf->tcp_payload_len,
                                                 pkt_type);
                        if (rc) {
                                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                                           "Can't send FPDU:delay rc=%d\n", rc);
                                /* don't reset fpdu -> we need it for next
                                 * classify
                                 */
                                break;
                        }

                        mpa_buf->tcp_payload_len -= fpdu->incomplete_bytes;
                        le16_add_cpu(&curr_pkt->first_mpa_offset,
                                     fpdu->incomplete_bytes);

                        /* The framed PDU was sent - no more incomplete bytes */
                        fpdu->incomplete_bytes = 0;
                        break;
                }
        } while (mpa_buf->tcp_payload_len && !rc);

        return rc;

err:
        qed_iwarp_ll2_post_rx(p_hwfn,
                              buf,
                              p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle);
        return rc;
}

static void qed_iwarp_process_pending_pkts(struct qed_hwfn *p_hwfn)
{
        struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
        struct qed_iwarp_ll2_mpa_buf *mpa_buf = NULL;
        int rc;

        while (!list_empty(&iwarp_info->mpa_buf_pending_list)) {
                mpa_buf = list_first_entry(&iwarp_info->mpa_buf_pending_list,
                                           struct qed_iwarp_ll2_mpa_buf,
                                           list_entry);

                rc = qed_iwarp_process_mpa_pkt(p_hwfn, mpa_buf);

                /* busy means break and continue processing later, don't
                 * remove the buf from the pending list.
                 */
                if (rc == -EBUSY)
                        break;

                list_move_tail(&mpa_buf->list_entry,
                               &iwarp_info->mpa_buf_list);

                if (rc) {       /* different error, don't continue */
                        DP_NOTICE(p_hwfn, "process pkts failed rc=%d\n", rc);
                        break;
                }
        }
}

static void
qed_iwarp_ll2_comp_mpa_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
{
        struct qed_iwarp_ll2_mpa_buf *mpa_buf;
        struct qed_iwarp_info *iwarp_info;
        struct qed_hwfn *p_hwfn = cxt;
        u16 first_mpa_offset;

        iwarp_info = &p_hwfn->p_rdma_info->iwarp;
        mpa_buf = list_first_entry(&iwarp_info->mpa_buf_list,
                                   struct qed_iwarp_ll2_mpa_buf, list_entry);
        if (!mpa_buf) {
                DP_ERR(p_hwfn, "No free mpa buf\n");
                goto err;
        }

        list_del(&mpa_buf->list_entry);
        qed_iwarp_mpa_get_data(p_hwfn, &mpa_buf->data,
                               data->opaque_data_0, data->opaque_data_1);

        first_mpa_offset = le16_to_cpu(mpa_buf->data.first_mpa_offset);

        DP_VERBOSE(p_hwfn,
                   QED_MSG_RDMA,
                   "LL2 MPA CompRx payload_len:0x%x\tfirst_mpa_offset:0x%x\ttcp_payload_offset:0x%x\tflags:0x%x\tcid:0x%x\n",
                   data->length.packet_length, first_mpa_offset,
                   mpa_buf->data.tcp_payload_offset, mpa_buf->data.flags,
                   mpa_buf->data.cid);

        mpa_buf->ll2_buf = data->cookie;
        mpa_buf->tcp_payload_len = data->length.packet_length -
                                   first_mpa_offset;

        first_mpa_offset += data->u.placement_offset;
        mpa_buf->data.first_mpa_offset = cpu_to_le16(first_mpa_offset);
        mpa_buf->placement_offset = data->u.placement_offset;

        list_add_tail(&mpa_buf->list_entry, &iwarp_info->mpa_buf_pending_list);

        qed_iwarp_process_pending_pkts(p_hwfn);
        return;
err:
        qed_iwarp_ll2_post_rx(p_hwfn, data->cookie,
                              iwarp_info->ll2_mpa_handle);
}

static void
qed_iwarp_ll2_comp_syn_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
{
        struct qed_iwarp_ll2_buff *buf = data->cookie;
        struct qed_iwarp_listener *listener;
        struct qed_ll2_tx_pkt_info tx_pkt;
        struct qed_iwarp_cm_info cm_info;
        struct qed_hwfn *p_hwfn = cxt;
        u8 remote_mac_addr[ETH_ALEN];
        u8 local_mac_addr[ETH_ALEN];
        struct qed_iwarp_ep *ep;
        int tcp_start_offset;
        u8 ll2_syn_handle;
        int payload_len;
        u32 hdr_size;
        int rc;

        memset(&cm_info, 0, sizeof(cm_info));
        ll2_syn_handle = p_hwfn->p_rdma_info->iwarp.ll2_syn_handle;

        /* Check if packet was received with errors... */
        if (data->err_flags) {
                DP_NOTICE(p_hwfn, "Error received on SYN packet: 0x%x\n",
                          data->err_flags);
                goto err;
        }

        if (GET_FIELD(data->parse_flags,
                      PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED) &&
            GET_FIELD(data->parse_flags, PARSING_AND_ERR_FLAGS_L4CHKSMERROR)) {
                DP_NOTICE(p_hwfn, "Syn packet received with checksum error\n");
                goto err;
        }

        rc = qed_iwarp_parse_rx_pkt(p_hwfn, &cm_info, (u8 *)(buf->data) +
                                    data->u.placement_offset, remote_mac_addr,
                                    local_mac_addr, &payload_len,
                                    &tcp_start_offset);
        if (rc)
                goto err;

        /* Check if there is a listener for this 4-tuple+vlan */
        listener = qed_iwarp_get_listener(p_hwfn, &cm_info);
        if (!listener) {
                DP_VERBOSE(p_hwfn,
                           QED_MSG_RDMA,
                           "SYN received on tuple not listened on parse_flags=%d packet len=%d\n",
                           data->parse_flags, data->length.packet_length);

                memset(&tx_pkt, 0, sizeof(tx_pkt));
                tx_pkt.num_of_bds = 1;
                tx_pkt.l4_hdr_offset_w = (data->length.packet_length) >> 2;
                tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
                tx_pkt.first_frag = buf->data_phys_addr +
                                    data->u.placement_offset;
                tx_pkt.first_frag_len = data->length.packet_length;
                tx_pkt.cookie = buf;

                rc = qed_ll2_prepare_tx_packet(p_hwfn, ll2_syn_handle,
                                               &tx_pkt, true);

                if (rc) {
                        DP_NOTICE(p_hwfn,
                                  "Can't post SYN back to chip rc=%d\n", rc);
                        goto err;
                }
                return;
        }

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Received syn on listening port\n");
        /* There may be an open ep on this connection if this is a syn
         * retrasnmit... need to make sure there isn't...
         */
        if (qed_iwarp_ep_exists(p_hwfn, &cm_info))
                goto err;

        ep = qed_iwarp_get_free_ep(p_hwfn);
        if (!ep)
                goto err;

        spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
        list_add_tail(&ep->list_entry, &p_hwfn->p_rdma_info->iwarp.ep_list);
        spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);

        ether_addr_copy(ep->remote_mac_addr, remote_mac_addr);
        ether_addr_copy(ep->local_mac_addr, local_mac_addr);

        memcpy(&ep->cm_info, &cm_info, sizeof(ep->cm_info));

        hdr_size = ((cm_info.ip_version == QED_TCP_IPV4) ? 40 : 60);
        ep->mss = p_hwfn->p_rdma_info->iwarp.max_mtu - hdr_size;
        ep->mss = min_t(u16, QED_IWARP_MAX_FW_MSS, ep->mss);

        ep->event_cb = listener->event_cb;
        ep->cb_context = listener->cb_context;
        ep->connect_mode = TCP_CONNECT_PASSIVE;

        ep->syn = buf;
        ep->syn_ip_payload_length = (u16)payload_len;
        ep->syn_phy_addr = buf->data_phys_addr + data->u.placement_offset +
                           tcp_start_offset;

        rc = qed_iwarp_tcp_offload(p_hwfn, ep);
        if (rc) {
                qed_iwarp_return_ep(p_hwfn, ep);
                goto err;
        }

        return;
err:
        qed_iwarp_ll2_post_rx(p_hwfn, buf, ll2_syn_handle);
}

static void qed_iwarp_ll2_rel_rx_pkt(void *cxt, u8 connection_handle,
                                     void *cookie, dma_addr_t rx_buf_addr,
                                     bool b_last_packet)
{
        struct qed_iwarp_ll2_buff *buffer = cookie;
        struct qed_hwfn *p_hwfn = cxt;

        dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
                          buffer->data, buffer->data_phys_addr);
        kfree(buffer);
}

static void qed_iwarp_ll2_comp_tx_pkt(void *cxt, u8 connection_handle,
                                      void *cookie, dma_addr_t first_frag_addr,
                                      bool b_last_fragment, bool b_last_packet)
{
        struct qed_iwarp_ll2_buff *buffer = cookie;
        struct qed_iwarp_ll2_buff *piggy;
        struct qed_hwfn *p_hwfn = cxt;

        if (!buffer)            /* can happen in packed mpa unaligned... */
                return;

        /* this was originally an rx packet, post it back */
        piggy = buffer->piggy_buf;
        if (piggy) {
                buffer->piggy_buf = NULL;
                qed_iwarp_ll2_post_rx(p_hwfn, piggy, connection_handle);
        }

        qed_iwarp_ll2_post_rx(p_hwfn, buffer, connection_handle);

        if (connection_handle == p_hwfn->p_rdma_info->iwarp.ll2_mpa_handle)
                qed_iwarp_process_pending_pkts(p_hwfn);

        return;
}

static void qed_iwarp_ll2_rel_tx_pkt(void *cxt, u8 connection_handle,
                                     void *cookie, dma_addr_t first_frag_addr,
                                     bool b_last_fragment, bool b_last_packet)
{
        struct qed_iwarp_ll2_buff *buffer = cookie;
        struct qed_hwfn *p_hwfn = cxt;

        if (!buffer)
                return;

        if (buffer->piggy_buf) {
                dma_free_coherent(&p_hwfn->cdev->pdev->dev,
                                  buffer->piggy_buf->buff_size,
                                  buffer->piggy_buf->data,
                                  buffer->piggy_buf->data_phys_addr);

                kfree(buffer->piggy_buf);
        }

        dma_free_coherent(&p_hwfn->cdev->pdev->dev, buffer->buff_size,
                          buffer->data, buffer->data_phys_addr);

        kfree(buffer);
}

/* The only slowpath for iwarp ll2 is unalign flush. When this completion
 * is received, need to reset the FPDU.
 */
static void
qed_iwarp_ll2_slowpath(void *cxt,
                       u8 connection_handle,
                       u32 opaque_data_0, u32 opaque_data_1)
{
        struct unaligned_opaque_data unalign_data;
        struct qed_hwfn *p_hwfn = cxt;
        struct qed_iwarp_fpdu *fpdu;
        u32 cid;

        qed_iwarp_mpa_get_data(p_hwfn, &unalign_data,
                               opaque_data_0, opaque_data_1);

        cid = le32_to_cpu(unalign_data.cid);

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "(0x%x) Flush fpdu\n", cid);

        fpdu = qed_iwarp_get_curr_fpdu(p_hwfn, (u16)cid);
        if (fpdu)
                memset(fpdu, 0, sizeof(*fpdu));
}

static int qed_iwarp_ll2_stop(struct qed_hwfn *p_hwfn)
{
        struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
        int rc = 0;

        if (iwarp_info->ll2_syn_handle != QED_IWARP_HANDLE_INVAL) {
                rc = qed_ll2_terminate_connection(p_hwfn,
                                                  iwarp_info->ll2_syn_handle);
                if (rc)
                        DP_INFO(p_hwfn, "Failed to terminate syn connection\n");

                qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_syn_handle);
                iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
        }

        if (iwarp_info->ll2_ooo_handle != QED_IWARP_HANDLE_INVAL) {
                rc = qed_ll2_terminate_connection(p_hwfn,
                                                  iwarp_info->ll2_ooo_handle);
                if (rc)
                        DP_INFO(p_hwfn, "Failed to terminate ooo connection\n");

                qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
                iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
        }

        if (iwarp_info->ll2_mpa_handle != QED_IWARP_HANDLE_INVAL) {
                rc = qed_ll2_terminate_connection(p_hwfn,
                                                  iwarp_info->ll2_mpa_handle);
                if (rc)
                        DP_INFO(p_hwfn, "Failed to terminate mpa connection\n");

                qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
                iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
        }

        qed_llh_remove_mac_filter(p_hwfn->cdev, 0,
                                  p_hwfn->p_rdma_info->iwarp.mac_addr);

        return rc;
}

static int
qed_iwarp_ll2_alloc_buffers(struct qed_hwfn *p_hwfn,
                            int num_rx_bufs, int buff_size, u8 ll2_handle)
{
        struct qed_iwarp_ll2_buff *buffer;
        int rc = 0;
        int i;

        for (i = 0; i < num_rx_bufs; i++) {
                buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
                if (!buffer) {
                        rc = -ENOMEM;
                        break;
                }

                buffer->data = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
                                                  buff_size,
                                                  &buffer->data_phys_addr,
                                                  GFP_KERNEL);
                if (!buffer->data) {
                        kfree(buffer);
                        rc = -ENOMEM;
                        break;
                }

                buffer->buff_size = buff_size;
                rc = qed_iwarp_ll2_post_rx(p_hwfn, buffer, ll2_handle);
                if (rc)
                        /* buffers will be deallocated by qed_ll2 */
                        break;
        }
        return rc;
}

#define QED_IWARP_MAX_BUF_SIZE(mtu)                                  \
        ALIGN((mtu) + ETH_HLEN + 2 * VLAN_HLEN + 2 + ETH_CACHE_LINE_SIZE, \
                ETH_CACHE_LINE_SIZE)

static int
qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
                    struct qed_rdma_start_in_params *params,
                    u32 rcv_wnd_size)
{
        struct qed_iwarp_info *iwarp_info;
        struct qed_ll2_acquire_data data;
        struct qed_ll2_cbs cbs;
        u32 buff_size;
        u16 n_ooo_bufs;
        int rc = 0;
        int i;

        iwarp_info = &p_hwfn->p_rdma_info->iwarp;
        iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
        iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
        iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;

        iwarp_info->max_mtu = params->max_mtu;

        ether_addr_copy(p_hwfn->p_rdma_info->iwarp.mac_addr, params->mac_addr);

        rc = qed_llh_add_mac_filter(p_hwfn->cdev, 0, params->mac_addr);
        if (rc)
                return rc;

        /* Start SYN connection */
        cbs.rx_comp_cb = qed_iwarp_ll2_comp_syn_pkt;
        cbs.rx_release_cb = qed_iwarp_ll2_rel_rx_pkt;
        cbs.tx_comp_cb = qed_iwarp_ll2_comp_tx_pkt;
        cbs.tx_release_cb = qed_iwarp_ll2_rel_tx_pkt;
        cbs.slowpath_cb = NULL;
        cbs.cookie = p_hwfn;

        memset(&data, 0, sizeof(data));
        data.input.conn_type = QED_LL2_TYPE_IWARP;
        /* SYN will use ctx based queues */
        data.input.rx_conn_type = QED_LL2_RX_TYPE_CTX;
        data.input.mtu = params->max_mtu;
        data.input.rx_num_desc = QED_IWARP_LL2_SYN_RX_SIZE;
        data.input.tx_num_desc = QED_IWARP_LL2_SYN_TX_SIZE;
        data.input.tx_max_bds_per_packet = 1;   /* will never be fragmented */
        data.input.tx_tc = PKT_LB_TC;
        data.input.tx_dest = QED_LL2_TX_DEST_LB;
        data.p_connection_handle = &iwarp_info->ll2_syn_handle;
        data.cbs = &cbs;

        rc = qed_ll2_acquire_connection(p_hwfn, &data);
        if (rc) {
                DP_NOTICE(p_hwfn, "Failed to acquire LL2 connection\n");
                qed_llh_remove_mac_filter(p_hwfn->cdev, 0, params->mac_addr);
                return rc;
        }

        rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_syn_handle);
        if (rc) {
                DP_NOTICE(p_hwfn, "Failed to establish LL2 connection\n");
                goto err;
        }

        buff_size = QED_IWARP_MAX_BUF_SIZE(params->max_mtu);
        rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
                                         QED_IWARP_LL2_SYN_RX_SIZE,
                                         buff_size,
                                         iwarp_info->ll2_syn_handle);
        if (rc)
                goto err;

        /* Start OOO connection */
        data.input.conn_type = QED_LL2_TYPE_OOO;
        /* OOO/unaligned will use legacy ll2 queues (ram based) */
        data.input.rx_conn_type = QED_LL2_RX_TYPE_LEGACY;
        data.input.mtu = params->max_mtu;

        n_ooo_bufs = (QED_IWARP_MAX_OOO * rcv_wnd_size) /
                     iwarp_info->max_mtu;
        n_ooo_bufs = min_t(u32, n_ooo_bufs, QED_IWARP_LL2_OOO_MAX_RX_SIZE);

        data.input.rx_num_desc = n_ooo_bufs;
        data.input.rx_num_ooo_buffers = n_ooo_bufs;

        data.input.tx_max_bds_per_packet = 1;   /* will never be fragmented */
        data.input.tx_num_desc = QED_IWARP_LL2_OOO_DEF_TX_SIZE;
        data.p_connection_handle = &iwarp_info->ll2_ooo_handle;

        rc = qed_ll2_acquire_connection(p_hwfn, &data);
        if (rc)
                goto err;

        rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
        if (rc)
                goto err;

        /* Start Unaligned MPA connection */
        cbs.rx_comp_cb = qed_iwarp_ll2_comp_mpa_pkt;
        cbs.slowpath_cb = qed_iwarp_ll2_slowpath;

        memset(&data, 0, sizeof(data));
        data.input.conn_type = QED_LL2_TYPE_IWARP;
        data.input.mtu = params->max_mtu;
        /* FW requires that once a packet arrives OOO, it must have at
         * least 2 rx buffers available on the unaligned connection
         * for handling the case that it is a partial fpdu.
         */
        data.input.rx_num_desc = n_ooo_bufs * 2;
        data.input.tx_num_desc = data.input.rx_num_desc;
        data.input.tx_max_bds_per_packet = QED_IWARP_MAX_BDS_PER_FPDU;
        data.input.tx_tc = PKT_LB_TC;
        data.input.tx_dest = QED_LL2_TX_DEST_LB;
        data.p_connection_handle = &iwarp_info->ll2_mpa_handle;
        data.input.secondary_queue = true;
        data.cbs = &cbs;

        rc = qed_ll2_acquire_connection(p_hwfn, &data);
        if (rc)
                goto err;

        rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
        if (rc)
                goto err;

        rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
                                         data.input.rx_num_desc,
                                         buff_size,
                                         iwarp_info->ll2_mpa_handle);
        if (rc)
                goto err;

        iwarp_info->partial_fpdus = kcalloc((u16)p_hwfn->p_rdma_info->num_qps,
                                            sizeof(*iwarp_info->partial_fpdus),
                                            GFP_KERNEL);
        if (!iwarp_info->partial_fpdus) {
                rc = -ENOMEM;
                goto err;
        }

        iwarp_info->max_num_partial_fpdus = (u16)p_hwfn->p_rdma_info->num_qps;

        iwarp_info->mpa_intermediate_buf = kzalloc(buff_size, GFP_KERNEL);
        if (!iwarp_info->mpa_intermediate_buf) {
                rc = -ENOMEM;
                goto err;
        }

        /* The mpa_bufs array serves for pending RX packets received on the
         * mpa ll2 that don't have place on the tx ring and require later
         * processing. We can't fail on allocation of such a struct therefore
         * we allocate enough to take care of all rx packets
         */
        iwarp_info->mpa_bufs = kcalloc(data.input.rx_num_desc,
                                       sizeof(*iwarp_info->mpa_bufs),
                                       GFP_KERNEL);
        if (!iwarp_info->mpa_bufs) {
                rc = -ENOMEM;
                goto err;
        }

        INIT_LIST_HEAD(&iwarp_info->mpa_buf_pending_list);
        INIT_LIST_HEAD(&iwarp_info->mpa_buf_list);
        for (i = 0; i < data.input.rx_num_desc; i++)
                list_add_tail(&iwarp_info->mpa_bufs[i].list_entry,
                              &iwarp_info->mpa_buf_list);
        return rc;
err:
        qed_iwarp_ll2_stop(p_hwfn);

        return rc;
}

static struct {
        u32 two_ports;
        u32 four_ports;
} qed_iwarp_rcv_wnd_size[MAX_CHIP_IDS] = {
        {QED_IWARP_RCV_WND_SIZE_DEF_BB_2P, QED_IWARP_RCV_WND_SIZE_DEF_BB_4P},
        {QED_IWARP_RCV_WND_SIZE_DEF_AH_2P, QED_IWARP_RCV_WND_SIZE_DEF_AH_4P}
};

int qed_iwarp_setup(struct qed_hwfn *p_hwfn,
                    struct qed_rdma_start_in_params *params)
{
        struct qed_dev *cdev = p_hwfn->cdev;
        struct qed_iwarp_info *iwarp_info;
        enum chip_ids chip_id;
        u32 rcv_wnd_size;

        iwarp_info = &p_hwfn->p_rdma_info->iwarp;

        iwarp_info->tcp_flags = QED_IWARP_TS_EN;

        chip_id = QED_IS_BB(cdev) ? CHIP_BB : CHIP_K2;
        rcv_wnd_size = (qed_device_num_ports(cdev) == 4) ?
                qed_iwarp_rcv_wnd_size[chip_id].four_ports :
                qed_iwarp_rcv_wnd_size[chip_id].two_ports;

        /* value 0 is used for ilog2(QED_IWARP_RCV_WND_SIZE_MIN) */
        iwarp_info->rcv_wnd_scale = ilog2(rcv_wnd_size) -
            ilog2(QED_IWARP_RCV_WND_SIZE_MIN);
        iwarp_info->rcv_wnd_size = rcv_wnd_size >> iwarp_info->rcv_wnd_scale;
        iwarp_info->crc_needed = QED_IWARP_PARAM_CRC_NEEDED;
        iwarp_info->mpa_rev = MPA_NEGOTIATION_TYPE_ENHANCED;

        iwarp_info->peer2peer = QED_IWARP_PARAM_P2P;

        iwarp_info->rtr_type =  MPA_RTR_TYPE_ZERO_SEND |
                                MPA_RTR_TYPE_ZERO_WRITE |
                                MPA_RTR_TYPE_ZERO_READ;

        spin_lock_init(&p_hwfn->p_rdma_info->iwarp.qp_lock);
        INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.ep_list);
        INIT_LIST_HEAD(&p_hwfn->p_rdma_info->iwarp.listen_list);

        qed_spq_register_async_cb(p_hwfn, PROTOCOLID_IWARP,
                                  qed_iwarp_async_event);
        qed_ooo_setup(p_hwfn);

        return qed_iwarp_ll2_start(p_hwfn, params, rcv_wnd_size);
}

int qed_iwarp_stop(struct qed_hwfn *p_hwfn)
{
        int rc;

        qed_iwarp_free_prealloc_ep(p_hwfn);
        rc = qed_iwarp_wait_for_all_cids(p_hwfn);
        if (rc)
                return rc;

        return qed_iwarp_ll2_stop(p_hwfn);
}

static void qed_iwarp_qp_in_error(struct qed_hwfn *p_hwfn,
                                  struct qed_iwarp_ep *ep,
                                  u8 fw_return_code)
{
        struct qed_iwarp_cm_event_params params;

        qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_ERROR, true);

        params.event = QED_IWARP_EVENT_CLOSE;
        params.ep_context = ep;
        params.cm_info = &ep->cm_info;
        params.status = (fw_return_code == IWARP_QP_IN_ERROR_GOOD_CLOSE) ?
                         0 : -ECONNRESET;

        /* paired with READ_ONCE in destroy_qp */
        smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);

        spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
        list_del(&ep->list_entry);
        spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);

        ep->event_cb(ep->cb_context, &params);
}

static void qed_iwarp_exception_received(struct qed_hwfn *p_hwfn,
                                         struct qed_iwarp_ep *ep,
                                         int fw_ret_code)
{
        struct qed_iwarp_cm_event_params params;
        bool event_cb = false;

        DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x) fw_ret_code=%d\n",
                   ep->cid, fw_ret_code);

        switch (fw_ret_code) {
        case IWARP_EXCEPTION_DETECTED_LLP_CLOSED:
                params.status = 0;
                params.event = QED_IWARP_EVENT_DISCONNECT;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_LLP_RESET:
                params.status = -ECONNRESET;
                params.event = QED_IWARP_EVENT_DISCONNECT;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_RQ_EMPTY:
                params.event = QED_IWARP_EVENT_RQ_EMPTY;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_IRQ_FULL:
                params.event = QED_IWARP_EVENT_IRQ_FULL;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_LLP_TIMEOUT:
                params.event = QED_IWARP_EVENT_LLP_TIMEOUT;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_REMOTE_PROTECTION_ERROR:
                params.event = QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_CQ_OVERFLOW:
                params.event = QED_IWARP_EVENT_CQ_OVERFLOW;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_LOCAL_CATASTROPHIC:
                params.event = QED_IWARP_EVENT_QP_CATASTROPHIC;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_LOCAL_ACCESS_ERROR:
                params.event = QED_IWARP_EVENT_LOCAL_ACCESS_ERROR;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_REMOTE_OPERATION_ERROR:
                params.event = QED_IWARP_EVENT_REMOTE_OPERATION_ERROR;
                event_cb = true;
                break;
        case IWARP_EXCEPTION_DETECTED_TERMINATE_RECEIVED:
                params.event = QED_IWARP_EVENT_TERMINATE_RECEIVED;
                event_cb = true;
                break;
        default:
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "Unhandled exception received...fw_ret_code=%d\n",
                           fw_ret_code);
                break;
        }

        if (event_cb) {
                params.ep_context = ep;
                params.cm_info = &ep->cm_info;
                ep->event_cb(ep->cb_context, &params);
        }
}

static void
qed_iwarp_tcp_connect_unsuccessful(struct qed_hwfn *p_hwfn,
                                   struct qed_iwarp_ep *ep, u8 fw_return_code)
{
        struct qed_iwarp_cm_event_params params;

        memset(&params, 0, sizeof(params));
        params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
        params.ep_context = ep;
        params.cm_info = &ep->cm_info;
        /* paired with READ_ONCE in destroy_qp */
        smp_store_release(&ep->state, QED_IWARP_EP_CLOSED);

        switch (fw_return_code) {
        case IWARP_CONN_ERROR_TCP_CONNECT_INVALID_PACKET:
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "%s(0x%x) TCP connect got invalid packet\n",
                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
                params.status = -ECONNRESET;
                break;
        case IWARP_CONN_ERROR_TCP_CONNECTION_RST:
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "%s(0x%x) TCP Connection Reset\n",
                           QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
                params.status = -ECONNRESET;
                break;
        case IWARP_CONN_ERROR_TCP_CONNECT_TIMEOUT:
                DP_NOTICE(p_hwfn, "%s(0x%x) TCP timeout\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
                params.status = -EBUSY;
                break;
        case IWARP_CONN_ERROR_MPA_NOT_SUPPORTED_VER:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA not supported VER\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
                params.status = -ECONNREFUSED;
                break;
        case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
                DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
                params.status = -ECONNRESET;
                break;
        default:
                DP_ERR(p_hwfn,
                       "%s(0x%x) Unexpected return code tcp connect: %d\n",
                       QED_IWARP_CONNECT_MODE_STRING(ep),
                       ep->tcp_cid, fw_return_code);
                params.status = -ECONNRESET;
                break;
        }