/* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver.
 *
 * Copyright (c) 2006 - 2013 Broadcom Corporation
 * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
 * Copyright (c) 2007, 2008 Mike Christie
 * Copyright (c) 2014, QLogic Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
 * Maintained by: QLogic-Storage-Upstream@qlogic.com
 */

#include <linux/gfp.h>
#include <scsi/scsi_tcq.h>
#include <scsi/libiscsi.h>
#include "bnx2i.h"

DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);

/**
 * bnx2i_get_cid_num - get cid from ep
 * @ep:         endpoint pointer
 *
 * Only applicable to 57710 family of devices
 */
static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
{
        u32 cid;

        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
                cid = ep->ep_cid;
        else
                cid = GET_CID_NUM(ep->ep_cid);
        return cid;
}


/**
 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
 * @hba:                Adapter for which adjustments is to be made
 *
 * Only applicable to 57710 family of devices
 */
static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
{
        u32 num_elements_per_pg;

        if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
            test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
            test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
                if (!is_power_of_2(hba->max_sqes))
                        hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);

                if (!is_power_of_2(hba->max_rqes))
                        hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
        }

        /* Adjust each queue size if the user selection does not
         * yield integral num of page buffers
         */
        /* adjust SQ */
        num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
        if (hba->max_sqes < num_elements_per_pg)
                hba->max_sqes = num_elements_per_pg;
        else if (hba->max_sqes % num_elements_per_pg)
                hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
                                 ~(num_elements_per_pg - 1);

        /* adjust CQ */
        num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE;
        if (hba->max_cqes < num_elements_per_pg)
                hba->max_cqes = num_elements_per_pg;
        else if (hba->max_cqes % num_elements_per_pg)
                hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
                                 ~(num_elements_per_pg - 1);

        /* adjust RQ */
        num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
        if (hba->max_rqes < num_elements_per_pg)
                hba->max_rqes = num_elements_per_pg;
        else if (hba->max_rqes % num_elements_per_pg)
                hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
                                 ~(num_elements_per_pg - 1);
}


/**
 * bnx2i_get_link_state - get network interface link state
 * @hba:        adapter instance pointer
 *
 * updates adapter structure flag based on netdev state
 */
static void bnx2i_get_link_state(struct bnx2i_hba *hba)
{
        if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
                set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
        else
                clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
}


/**
 * bnx2i_iscsi_license_error - displays iscsi license related error message
 * @hba:                adapter instance pointer
 * @error_code:         error classification
 *
 * Puts out an error log when driver is unable to offload iscsi connection
 *      due to license restrictions
 */
static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
{
        if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
                /* iSCSI offload not supported on this device */
                printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
                                hba->netdev->name);
        if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
                /* iSCSI offload not supported on this LOM device */
                printk(KERN_ERR "bnx2i: LOM is not enable to "
                                "offload iSCSI connections, dev=%s\n",
                                hba->netdev->name);
        set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
}


/**
 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
 * @ep:         endpoint (transport identifier) structure
 * @action:     action, ARM or DISARM. For now only ARM_CQE is used
 *
 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
 *      the driver. EQ event is generated CQ index is hit or at least 1 CQ is
 *      outstanding and on chip timer expires
 */
int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
{
        struct bnx2i_5771x_cq_db *cq_db;
        u16 cq_index;
        u16 next_index = 0;
        u32 num_active_cmds;

        /* Coalesce CQ entries only on 10G devices */
        if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
                return 0;

        /* Do not update CQ DB multiple times before firmware writes
         * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
         * interrupts and other unwanted results
         */
        cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;

        if (action != CNIC_ARM_CQE_FP)
                if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
                        return 0;

        if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
                num_active_cmds = atomic_read(&ep->num_active_cmds);
                if (num_active_cmds <= event_coal_min)
                        next_index = 1;
                else {
                        next_index = num_active_cmds >> ep->ec_shift;
                        if (next_index > num_active_cmds - event_coal_min)
                                next_index = num_active_cmds - event_coal_min;
                }
                if (!next_index)
                        next_index = 1;
                cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
                if (cq_index > ep->qp.cqe_size * 2)
                        cq_index -= ep->qp.cqe_size * 2;
                if (!cq_index)
                        cq_index = 1;

                cq_db->sqn[0] = cq_index;
        }
        return next_index;
}


/**
 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
 * @conn:               iscsi connection on which RQ event occurred
 * @ptr:                driver buffer to which RQ buffer contents is to
 *                      be copied
 * @len:                length of valid data inside RQ buf
 *
 * Copies RQ buffer contents from shared (DMA'able) memory region to
 *      driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
 *      scsi sense info
 */
void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
{
        if (!bnx2i_conn->ep->qp.rqe_left)
                return;

        bnx2i_conn->ep->qp.rqe_left--;
        memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
        if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
                bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
                bnx2i_conn->ep->qp.rq_cons_idx = 0;
        } else {
                bnx2i_conn->ep->qp.rq_cons_qe++;
                bnx2i_conn->ep->qp.rq_cons_idx++;
        }
}


static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
{
        struct bnx2i_5771x_dbell dbell;
        u32 msg;

        memset(&dbell, 0, sizeof(dbell));
        dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
                              B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
        msg = *((u32 *)&dbell);
        /* TODO : get doorbell register mapping */
        writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
}


/**
 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
 * @conn:       iscsi connection on which event to post
 * @count:      number of RQ buffer being posted to chip
 *
 * No need to ring hardware doorbell for 57710 family of devices
 */
void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
{
        struct bnx2i_5771x_sq_rq_db *rq_db;
        u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
        struct bnx2i_endpoint *ep = bnx2i_conn->ep;

        ep->qp.rqe_left += count;
        ep->qp.rq_prod_idx &= 0x7FFF;
        ep->qp.rq_prod_idx += count;

        if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
                ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
                if (!hi_bit)
                        ep->qp.rq_prod_idx |= 0x8000;
        } else
                ep->qp.rq_prod_idx |= hi_bit;

        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
                rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
                rq_db->prod_idx = ep->qp.rq_prod_idx;
                /* no need to ring hardware doorbell for 57710 */
        } else {
                writew(ep->qp.rq_prod_idx,
                       ep->qp.ctx_base + CNIC_RECV_DOORBELL);
        }
        mmiowb();
}


/**
 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
 * @conn:               iscsi connection to which new SQ entries belong
 * @count:              number of SQ WQEs to post
 *
 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
 *      of devices. For 5706/5708/5709 new SQ WQE count is written into the
 *      doorbell register
 */
static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
{
        struct bnx2i_5771x_sq_rq_db *sq_db;
        struct bnx2i_endpoint *ep = bnx2i_conn->ep;

        atomic_inc(&ep->num_active_cmds);
        wmb();  /* flush SQ WQE memory before the doorbell is rung */
        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
                sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
                sq_db->prod_idx = ep->qp.sq_prod_idx;
                bnx2i_ring_577xx_doorbell(bnx2i_conn);
        } else
                writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);

        mmiowb(); /* flush posted PCI writes */
}


/**
 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
 * @conn:       iscsi connection to which new SQ entries belong
 * @count:      number of SQ WQEs to post
 *
 * this routine will update SQ driver parameters and ring the doorbell
 */
static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
                                              int count)
{
        int tmp_cnt;

        if (count == 1) {
                if (bnx2i_conn->ep->qp.sq_prod_qe ==
                    bnx2i_conn->ep->qp.sq_last_qe)
                        bnx2i_conn->ep->qp.sq_prod_qe =
                                                bnx2i_conn->ep->qp.sq_first_qe;
                else
                        bnx2i_conn->ep->qp.sq_prod_qe++;
        } else {
                if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
                    bnx2i_conn->ep->qp.sq_last_qe)
                        bnx2i_conn->ep->qp.sq_prod_qe += count;
                else {
                        tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
                                bnx2i_conn->ep->qp.sq_prod_qe;
                        bnx2i_conn->ep->qp.sq_prod_qe =
                                &bnx2i_conn->ep->qp.sq_first_qe[count -
                                                                (tmp_cnt + 1)];
                }
        }
        bnx2i_conn->ep->qp.sq_prod_idx += count;
        /* Ring the doorbell */
        bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
}


/**
 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
 * @conn:       iscsi connection
 * @cmd:        driver command structure which is requesting
 *              a WQE to sent to chip for further processing
 *
 * prepare and post an iSCSI Login request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
                           struct iscsi_task *task)
{
        struct bnx2i_cmd *bnx2i_cmd;
        struct bnx2i_login_request *login_wqe;
        struct iscsi_login_req *login_hdr;
        u32 dword;

        bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
        login_hdr = (struct iscsi_login_req *)task->hdr;
        login_wqe = (struct bnx2i_login_request *)
                                                bnx2i_conn->ep->qp.sq_prod_qe;

        login_wqe->op_code = login_hdr->opcode;
        login_wqe->op_attr = login_hdr->flags;
        login_wqe->version_max = login_hdr->max_version;
        login_wqe->version_min = login_hdr->min_version;
        login_wqe->data_length = ntoh24(login_hdr->dlength);
        login_wqe->isid_lo = *((u32 *) login_hdr->isid);
        login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
        login_wqe->tsih = login_hdr->tsih;
        login_wqe->itt = task->itt |
                (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
        login_wqe->cid = login_hdr->cid;

        login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
        login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
        login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;

        login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
        login_wqe->resp_bd_list_addr_hi =
                (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);

        dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
                 (bnx2i_conn->gen_pdu.resp_buf_size <<
                  ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
        login_wqe->resp_buffer = dword;
        login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
        login_wqe->bd_list_addr_hi =
                (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
        login_wqe->num_bds = 1;
        login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
        return 0;
}

/**
 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
 * @conn:       iscsi connection
 * @mtask:      driver command structure which is requesting
 *              a WQE to sent to chip for further processing
 *
 * prepare and post an iSCSI Login request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
                         struct iscsi_task *mtask)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct iscsi_tm *tmfabort_hdr;
        struct scsi_cmnd *ref_sc;
        struct iscsi_task *ctask;
        struct bnx2i_cmd *bnx2i_cmd;
        struct bnx2i_tmf_request *tmfabort_wqe;
        u32 dword;
        u32 scsi_lun[2];

        bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
        tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
        tmfabort_wqe = (struct bnx2i_tmf_request *)
                                                bnx2i_conn->ep->qp.sq_prod_qe;

        tmfabort_wqe->op_code = tmfabort_hdr->opcode;
        tmfabort_wqe->op_attr = tmfabort_hdr->flags;

        tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
        tmfabort_wqe->reserved2 = 0;
        tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);

        switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
        case ISCSI_TM_FUNC_ABORT_TASK:
        case ISCSI_TM_FUNC_TASK_REASSIGN:
                ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
                if (!ctask || !ctask->sc)
                        /*
                         * the iscsi layer must have completed the cmd while
                         * was starting up.
                         *
                         * Note: In the case of a SCSI cmd timeout, the task's
                         *       sc is still active; hence ctask->sc != 0
                         *       In this case, the task must be aborted
                         */
                        return 0;

                ref_sc = ctask->sc;
                if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
                        dword = (ISCSI_TASK_TYPE_WRITE <<
                                 ISCSI_CMD_REQUEST_TYPE_SHIFT);
                else
                        dword = (ISCSI_TASK_TYPE_READ <<
                                 ISCSI_CMD_REQUEST_TYPE_SHIFT);
                tmfabort_wqe->ref_itt = (dword |
                                        (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
                break;
        default:
                tmfabort_wqe->ref_itt = RESERVED_ITT;
        }
        memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
        tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
        tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);

        tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);

        tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
        tmfabort_wqe->bd_list_addr_hi = (u32)
                                ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
        tmfabort_wqe->num_bds = 1;
        tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
        return 0;
}

/**
 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
 * @conn:       iscsi connection
 * @mtask:      driver command structure which is requesting
 *              a WQE to sent to chip for further processing
 *
 * prepare and post an iSCSI Text request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
                          struct iscsi_task *mtask)
{
        struct bnx2i_cmd *bnx2i_cmd;
        struct bnx2i_text_request *text_wqe;
        struct iscsi_text *text_hdr;
        u32 dword;

        bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
        text_hdr = (struct iscsi_text *)mtask->hdr;
        text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;

        memset(text_wqe, 0, sizeof(struct bnx2i_text_request));

        text_wqe->op_code = text_hdr->opcode;
        text_wqe->op_attr = text_hdr->flags;
        text_wqe->data_length = ntoh24(text_hdr->dlength);
        text_wqe->itt = mtask->itt |
                (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
        text_wqe->ttt = be32_to_cpu(text_hdr->ttt);

        text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);

        text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
        text_wqe->resp_bd_list_addr_hi =
                        (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);

        dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
                 (bnx2i_conn->gen_pdu.resp_buf_size <<
                  ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
        text_wqe->resp_buffer = dword;
        text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
        text_wqe->bd_list_addr_hi =
                        (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
        text_wqe->num_bds = 1;
        text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
        return 0;
}


/**
 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
 * @conn:       iscsi connection
 * @cmd:        driver command structure which is requesting
 *              a WQE to sent to chip for further processing
 *
 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
                             struct bnx2i_cmd *cmd)
{
        struct bnx2i_cmd_request *scsi_cmd_wqe;

        scsi_cmd_wqe = (struct bnx2i_cmd_request *)
                                                bnx2i_conn->ep->qp.sq_prod_qe;
        memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
        scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
        return 0;
}

/**
 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
 * @conn:               iscsi connection
 * @cmd:                driver command structure which is requesting
 *                      a WQE to sent to chip for further processing
 * @datap:              payload buffer pointer
 * @data_len:           payload data length
 * @unsol:              indicated whether nopout pdu is unsolicited pdu or
 *                      in response to target's NOPIN w/ TTT != FFFFFFFF
 *
 * prepare and post a nopout request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
                            struct iscsi_task *task,
                            char *datap, int data_len, int unsol)
{
        struct bnx2i_endpoint *ep = bnx2i_conn->ep;
        struct bnx2i_cmd *bnx2i_cmd;
        struct bnx2i_nop_out_request *nopout_wqe;
        struct iscsi_nopout *nopout_hdr;

        bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
        nopout_hdr = (struct iscsi_nopout *)task->hdr;
        nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;

        memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));

        nopout_wqe->op_code = nopout_hdr->opcode;
        nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
        memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);

        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
                u32 tmp = nopout_wqe->lun[0];
                /* 57710 requires LUN field to be swapped */
                nopout_wqe->lun[0] = nopout_wqe->lun[1];
                nopout_wqe->lun[1] = tmp;
        }

        nopout_wqe->itt = ((u16)task->itt |
                           (ISCSI_TASK_TYPE_MPATH <<
                            ISCSI_TMF_REQUEST_TYPE_SHIFT));
        nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
        nopout_wqe->flags = 0;
        if (!unsol)
                nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
        else if (nopout_hdr->itt == RESERVED_ITT)
                nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;

        nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
        nopout_wqe->data_length = data_len;
        if (data_len) {
                /* handle payload data, not required in first release */
                printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
        } else {
                nopout_wqe->bd_list_addr_lo = (u32)
                                        bnx2i_conn->hba->mp_bd_dma;
                nopout_wqe->bd_list_addr_hi =
                        (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
                nopout_wqe->num_bds = 1;
        }
        nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
        return 0;
}


/**
 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
 * @conn:       iscsi connection
 * @cmd:        driver command structure which is requesting
 *              a WQE to sent to chip for further processing
 *
 * prepare and post logout request WQE to CNIC firmware
 */
int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
                            struct iscsi_task *task)
{
        struct bnx2i_cmd *bnx2i_cmd;
        struct bnx2i_logout_request *logout_wqe;
        struct iscsi_logout *logout_hdr;

        bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
        logout_hdr = (struct iscsi_logout *)task->hdr;

        logout_wqe = (struct bnx2i_logout_request *)
                                                bnx2i_conn->ep->qp.sq_prod_qe;
        memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));

        logout_wqe->op_code = logout_hdr->opcode;
        logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
        logout_wqe->op_attr =
                        logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
        logout_wqe->itt = ((u16)task->itt |
                           (ISCSI_TASK_TYPE_MPATH <<
                            ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
        logout_wqe->data_length = 0;
        logout_wqe->cid = 0;

        logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
        logout_wqe->bd_list_addr_hi = (u32)
                                ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
        logout_wqe->num_bds = 1;
        logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */

        bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;

        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
        return 0;
}


/**
 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
 * @conn:       iscsi connection which requires iscsi parameter update
 *
 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 */
void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
{
        struct bnx2i_conn *bnx2i_conn = conn->dd_data;
        struct bnx2i_hba *hba = bnx2i_conn->hba;
        struct kwqe *kwqe_arr[2];
        struct iscsi_kwqe_conn_update *update_wqe;
        struct iscsi_kwqe_conn_update conn_update_kwqe;

        update_wqe = &conn_update_kwqe;

        update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
        update_wqe->hdr.flags =
                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

        /* 5771x requires conn context id to be passed as is */
        if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
                update_wqe->context_id = bnx2i_conn->ep->ep_cid;
        else
                update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
        update_wqe->conn_flags = 0;
        if (conn->hdrdgst_en)
                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
        if (conn->datadgst_en)
                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
        if (conn->session->initial_r2t_en)
                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
        if (conn->session->imm_data_en)
                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;

        update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
        update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
        update_wqe->first_burst_length = conn->session->first_burst;
        update_wqe->max_burst_length = conn->session->max_burst;
        update_wqe->exp_stat_sn = conn->exp_statsn;
        update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
        update_wqe->session_error_recovery_level = conn->session->erl;
        iscsi_conn_printk(KERN_ALERT, conn,
                          "bnx2i: conn update - MBL 0x%x FBL 0x%x"
                          "MRDSL_I 0x%x MRDSL_T 0x%x \n",
                          update_wqe->max_burst_length,
                          update_wqe->first_burst_length,
                          update_wqe->max_recv_pdu_length,
                          update_wqe->max_send_pdu_length);

        kwqe_arr[0] = (struct kwqe *) update_wqe;
        if (hba->cnic && hba->cnic->submit_kwqes)
                hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
}


/**
 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
 * @data:       endpoint (transport handle) structure pointer
 *
 * routine to handle connection offload/destroy request timeout
 */
void bnx2i_ep_ofld_timer(unsigned long data)
{
        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;

        if (ep->state == EP_STATE_OFLD_START) {
                printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
                ep->state = EP_STATE_OFLD_FAILED;
        } else if (ep->state == EP_STATE_DISCONN_START) {
                printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
                ep->state = EP_STATE_DISCONN_TIMEDOUT;
        } else if (ep->state == EP_STATE_CLEANUP_START) {
                printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
                ep->state = EP_STATE_CLEANUP_FAILED;
        }

        wake_up_interruptible(&ep->ofld_wait);
}


static int bnx2i_power_of2(u32 val)
{
        u32 power = 0;
        if (val & (val - 1))
                return power;
        val--;
        while (val) {
                val = val >> 1;
                power++;
        }
        return power;
}


/**
 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
 * @hba:        adapter structure pointer
 * @cmd:        driver command structure which is requesting
 *              a WQE to sent to chip for further processing
 *
 * prepares and posts CONN_OFLD_REQ1/2 KWQE
 */
void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
{
        struct bnx2i_cleanup_request *cmd_cleanup;

        cmd_cleanup =
                (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
        memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));

        cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
        cmd_cleanup->itt = cmd->req.itt;
        cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */

        bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
}


/**
 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
 * @hba:        adapter structure pointer
 * @ep:         endpoint (transport identifier) structure
 *
 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 *      iscsi connection context clean-up process
 */
int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
        struct kwqe *kwqe_arr[2];
        struct iscsi_kwqe_conn_destroy conn_cleanup;
        int rc = -EINVAL;

        memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));

        conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
        conn_cleanup.hdr.flags =
                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
        /* 5771x requires conn context id to be passed as is */
        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
                conn_cleanup.context_id = ep->ep_cid;
        else
                conn_cleanup.context_id = (ep->ep_cid >> 7);

        conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;

        kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
        if (hba->cnic && hba->cnic->submit_kwqes)
                rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);

        return rc;
}


/**
 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
 * @hba:                adapter structure pointer
 * @ep:                 endpoint (transport identifier) structure
 *
 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 */
static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
                                         struct bnx2i_endpoint *ep)
{
        struct kwqe *kwqe_arr[2];
        struct iscsi_kwqe_conn_offload1 ofld_req1;
        struct iscsi_kwqe_conn_offload2 ofld_req2;
        dma_addr_t dma_addr;
        int num_kwqes = 2;
        u32 *ptbl;
        int rc = -EINVAL;

        ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
        ofld_req1.hdr.flags =
                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

        ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;

        dma_addr = ep->qp.sq_pgtbl_phys;
        ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
        ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

        dma_addr = ep->qp.cq_pgtbl_phys;
        ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
        ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

        ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
        ofld_req2.hdr.flags =
                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

        dma_addr = ep->qp.rq_pgtbl_phys;
        ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
        ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

        ptbl = (u32 *) ep->qp.sq_pgtbl_virt;

        ofld_req2.sq_first_pte.hi = *ptbl++;
        ofld_req2.sq_first_pte.lo = *ptbl;

        ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
        ofld_req2.cq_first_pte.hi = *ptbl++;
        ofld_req2.cq_first_pte.lo = *ptbl;

        kwqe_arr[0] = (struct kwqe *) &ofld_req1;
        kwqe_arr[1] = (struct kwqe *) &ofld_req2;
        ofld_req2.num_additional_wqes = 0;

        if (hba->cnic && hba->cnic->submit_kwqes)
                rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);

        return rc;
}


/**
 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
 * @hba:                adapter structure pointer
 * @ep:                 endpoint (transport identifier) structure
 *
 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 */
static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
                                          struct bnx2i_endpoint *ep)
{
        struct kwqe *kwqe_arr[5];
        struct iscsi_kwqe_conn_offload1 ofld_req1;
        struct iscsi_kwqe_conn_offload2 ofld_req2;
        struct iscsi_kwqe_conn_offload3 ofld_req3[1];
        dma_addr_t dma_addr;
        int num_kwqes = 2;
        u32 *ptbl;
        int rc = -EINVAL;

        ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
        ofld_req1.hdr.flags =
                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

        ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;

        dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
        ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
        ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

        dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
        ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
        ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

        ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
        ofld_req2.hdr.flags =
                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

        dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
        ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
        ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);

        ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
        ofld_req2.sq_first_pte.hi = *ptbl++;
        ofld_req2.sq_first_pte.lo = *ptbl;

        ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
        ofld_req2.cq_first_pte.hi = *ptbl++;
        ofld_req2.cq_first_pte.lo = *ptbl;

        kwqe_arr[0] = (struct kwqe *) &ofld_req1;
        kwqe_arr[1] = (struct kwqe *) &ofld_req2;

        ofld_req2.num_additional_wqes = 1;
        memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
        ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
        ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
        ofld_req3[0].qp_first_pte[0].lo = *ptbl;

        kwqe_arr[2] = (struct kwqe *) ofld_req3;
        /* need if we decide to go with multiple KCQE's per conn */
        num_kwqes += 1;

        if (hba->cnic && hba->cnic->submit_kwqes)
                rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);

        return rc;
}

/**
 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
 *
 * @hba:                adapter structure pointer
 * @ep:                 endpoint (transport identifier) structure
 *
 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 */
int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
        int rc;

        if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
                rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
        else
                rc = bnx2i_570x_send_conn_ofld_req(hba, ep);

        return rc;
}


/**
 * setup_qp_page_tables - iscsi QP page table setup function
 * @ep:         endpoint (transport identifier) structure
 *
 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
 *      PT in little endian format
 */
static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
{
        int num_pages;
        u32 *ptbl;
        dma_addr_t page;
        int cnic_dev_10g;

        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
                cnic_dev_10g = 1;
        else
                cnic_dev_10g = 0;

        /* SQ page table */
        memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
        num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE;
        page = ep->qp.sq_phys;

        if (cnic_dev_10g)
                ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
        else
                ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
        while (num_pages--) {
                if (cnic_dev_10g) {
                        /* PTE is written in little endian format for 57710 */
                        *ptbl = (u32) page;
                        ptbl++;
                        *ptbl = (u32) ((u64) page >> 32);
                        ptbl++;
                        page += CNIC_PAGE_SIZE;
                } else {
                        /* PTE is written in big endian format for
                         * 5706/5708/5709 devices */
                        *ptbl = (u32) ((u64) page >> 32);
                        ptbl++;
                        *ptbl = (u32) page;
                        ptbl++;
                        page += CNIC_PAGE_SIZE;
                }
        }

        /* RQ page table */
        memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
        num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE;
        page = ep->qp.rq_phys;

        if (cnic_dev_10g)
                ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
        else
                ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
        while (num_pages--) {
                if (cnic_dev_10g) {

                        /* PTE is written in little endian format for 57710 */
                        *ptbl = (u32) page;
                        ptbl++;
                        *ptbl = (u32) ((u64) page >> 32);
                        ptbl++;
                        page += CNIC_PAGE_SIZE;
                } else {
                        /* PTE is written in big endian format for
                         * 5706/5708/5709 devices */
                        *ptbl = (u32) ((u64) page >> 32);
                        ptbl++;
                        *ptbl = (u32) page;
                        ptbl++;
                        page += CNIC_PAGE_SIZE;
                }
        }

        /* CQ page table */
        memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
        num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE;
        page = ep->qp.cq_phys;

        if (cnic_dev_10g)
                ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
        else
                ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
        while (num_pages--) {
                if (cnic_dev_10g) {
                        /* PTE is written in little endian format for 57710 */
                        *ptbl = (u32) page;
                        ptbl++;
                        *ptbl = (u32) ((u64) page >> 32);
                        ptbl++;
                        page += CNIC_PAGE_SIZE;
                } else {
                        /* PTE is written in big endian format for
                         * 5706/5708/5709 devices */
                        *ptbl = (u32) ((u64) page >> 32);
                        ptbl++;
                        *ptbl = (u32) page;
                        ptbl++;
                        page += CNIC_PAGE_SIZE;
                }
        }
}


/**
 * bnx2i_alloc_qp_resc - allocates required resources for QP.
 * @hba:        adapter structure pointer
 * @ep:         endpoint (transport identifier) structure
 *
 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
 *      memory for SQ/RQ/CQ and page tables. EP structure elements such
 *      as producer/consumer indexes/pointers, queue sizes and page table
 *      contents are setup
 */
int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
        struct bnx2i_5771x_cq_db *cq_db;

        ep->hba = hba;
        ep->conn = NULL;
        ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;

        /* Allocate page table memory for SQ which is page aligned */
        ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
        ep->qp.sq_mem_size =
                (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
        ep->qp.sq_pgtbl_size =
                (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
        ep->qp.sq_pgtbl_size =
                (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;

        ep->qp.sq_pgtbl_virt =
                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
                                   &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
        if (!ep->qp.sq_pgtbl_virt) {
                printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
                                  ep->qp.sq_pgtbl_size);
                goto mem_alloc_err;
        }

        /* Allocate memory area for actual SQ element */
        ep->qp.sq_virt =
                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
                                   &ep->qp.sq_phys, GFP_KERNEL);
        if (!ep->qp.sq_virt) {
                printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
                                  ep->qp.sq_mem_size);
                goto mem_alloc_err;
        }

        memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
        ep->qp.sq_first_qe = ep->qp.sq_virt;
        ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
        ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
        ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
        ep->qp.sq_prod_idx = 0;
        ep->qp.sq_cons_idx = 0;
        ep->qp.sqe_left = hba->max_sqes;

        /* Allocate page table memory for CQ which is page aligned */
        ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
        ep->qp.cq_mem_size =
                (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
        ep->qp.cq_pgtbl_size =
                (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
        ep->qp.cq_pgtbl_size =
                (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;

        ep->qp.cq_pgtbl_virt =
                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
                                   &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
        if (!ep->qp.cq_pgtbl_virt) {
                printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
                                  ep->qp.cq_pgtbl_size);
                goto mem_alloc_err;
        }

        /* Allocate memory area for actual CQ element */
        ep->qp.cq_virt =
                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
                                   &ep->qp.cq_phys, GFP_KERNEL);
        if (!ep->qp.cq_virt) {
                printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
                                  ep->qp.cq_mem_size);
                goto mem_alloc_err;
        }
        memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);

        ep->qp.cq_first_qe = ep->qp.cq_virt;
        ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
        ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
        ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
        ep->qp.cq_prod_idx = 0;
        ep->qp.cq_cons_idx = 0;
        ep->qp.cqe_left = hba->max_cqes;
        ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
        ep->qp.cqe_size = hba->max_cqes;

        /* Invalidate all EQ CQE index, req only for 57710 */
        cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
        memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);

        /* Allocate page table memory for RQ which is page aligned */
        ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
        ep->qp.rq_mem_size =
                (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
        ep->qp.rq_pgtbl_size =
                (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
        ep->qp.rq_pgtbl_size =
                (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;

        ep->qp.rq_pgtbl_virt =
                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
                                   &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
        if (!ep->qp.rq_pgtbl_virt) {
                printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
                                  ep->qp.rq_pgtbl_size);
                goto mem_alloc_err;
        }

        /* Allocate memory area for actual RQ element */
        ep->qp.rq_virt =
                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
                                   &ep->qp.rq_phys, GFP_KERNEL);
        if (!ep->qp.rq_virt) {
                printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
                                  ep->qp.rq_mem_size);
                goto mem_alloc_err;
        }

        ep->qp.rq_first_qe = ep->qp.rq_virt;
        ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
        ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
        ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
        ep->qp.rq_prod_idx = 0x8000;
        ep->qp.rq_cons_idx = 0;
        ep->qp.rqe_left = hba->max_rqes;

        setup_qp_page_tables(ep);

        return 0;

mem_alloc_err:
        bnx2i_free_qp_resc(hba, ep);
        return -ENOMEM;
}



/**
 * bnx2i_free_qp_resc - free memory resources held by QP
 * @hba:        adapter structure pointer
 * @ep: endpoint (transport identifier) structure
 *
 * Free QP resources - SQ/RQ/CQ memory and page tables.
 */
void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
        if (ep->qp.ctx_base) {
                iounmap(ep->qp.ctx_base);
                ep->qp.ctx_base = NULL;
        }
        /* Free SQ mem */
        if (ep->qp.sq_pgtbl_virt) {
                dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
                                  ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
                ep->qp.sq_pgtbl_virt = NULL;
                ep->qp.sq_pgtbl_phys = 0;
        }
        if (ep->qp.sq_virt) {
                dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
                                  ep->qp.sq_virt, ep->qp.sq_phys);
                ep->qp.sq_virt = NULL;
                ep->qp.sq_phys = 0;
        }

        /* Free RQ mem */
        if (ep->qp.rq_pgtbl_virt) {
                dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
                                  ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
                ep->qp.rq_pgtbl_virt = NULL;
                ep->qp.rq_pgtbl_phys = 0;
        }
        if (ep->qp.rq_virt) {
                dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
                                  ep->qp.rq_virt, ep->qp.rq_phys);
                ep->qp.rq_virt = NULL;
                ep->qp.rq_phys = 0;
        }

        /* Free CQ mem */
        if (ep->qp.cq_pgtbl_virt) {
                dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
                                  ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
                ep->qp.cq_pgtbl_virt = NULL;
                ep->qp.cq_pgtbl_phys = 0;
        }
        if (ep->qp.cq_virt) {
                dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
                                  ep->qp.cq_virt, ep->qp.cq_phys);
                ep->qp.cq_virt = NULL;
                ep->qp.cq_phys = 0;
        }
}


/**
 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
 * @hba:        adapter structure pointer
 *
 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
 *      This results in iSCSi support validation and on-chip context manager
 *      initialization.  Firmware completes this handshake with a CQE carrying
 *      the result of iscsi support validation. Parameter carried by
 *      iscsi init request determines the number of offloaded connection and
 *      tolerance level for iscsi protocol violation this hba/chip can support
 */
int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
{
        struct kwqe *kwqe_arr[3];
        struct iscsi_kwqe_init1 iscsi_init;
        struct iscsi_kwqe_init2 iscsi_init2;
        int rc = 0;
        u64 mask64;

        memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1));
        memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2));

        bnx2i_adjust_qp_size(hba);

        iscsi_init.flags =
                (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
        if (en_tcp_dack)
                iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
        iscsi_init.reserved0 = 0;
        iscsi_init.num_cqs = 1;
        iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
        iscsi_init.hdr.flags =
                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);

        iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
        iscsi_init.dummy_buffer_addr_hi =
                (u32) ((u64) hba->dummy_buf_dma >> 32);

        hba->num_ccell = hba->max_sqes >> 1;
        hba->ctx_ccell_tasks =
                        ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
        iscsi_init.num_ccells_per_conn = hba->num_ccell;
        iscsi_init.num_tasks_per_conn = hba->max_sqes;
        iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
        iscsi_init.sq_num_wqes = hba->max_sqes;
        iscsi_init.cq_log_wqes_per_page =
                (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE);
        iscsi_init.cq_num_wqes = hba->max_cqes;
        iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
                                   (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
        iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
                                   (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
        iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
        iscsi_init.rq_num_wqes = hba->max_rqes;


        iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
        iscsi_init2.hdr.flags =
                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
        iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
        mask64 = 0x0ULL;
        mask64 |= (
                /* CISCO MDS */
                (1UL <<
                  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
                /* HP MSA1510i */
                (1UL <<
                  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
                /* EMC */
                (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
        if (error_mask1) {
                iscsi_init2.error_bit_map[0] = error_mask1;
                mask64 ^= (u32)(mask64);
                mask64 |= error_mask1;
        } else
                iscsi_init2.error_bit_map[0] = (u32) mask64;

        if (error_mask2) {
                iscsi_init2.error_bit_map[1] = error_mask2;
                mask64 &= 0xffffffff;
                mask64 |= ((u64)error_mask2 << 32);
        } else
                iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);

        iscsi_error_mask = mask64;

        kwqe_arr[0] = (struct kwqe *) &iscsi_init;
        kwqe_arr[1] = (struct kwqe *) &iscsi_init2;

        if (hba->cnic && hba->cnic->submit_kwqes)
                rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
        return rc;
}


/**
 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
 * @session:    iscsi session
 * @bnx2i_conn: bnx2i connection
 * @cqe:        pointer to newly DMA'ed CQE entry for processing
 *
 * process SCSI CMD Response CQE & complete the request to SCSI-ML
 */
int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
                                struct bnx2i_conn *bnx2i_conn,
                                struct cqe *cqe)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct bnx2i_hba *hba = bnx2i_conn->hba;
        struct bnx2i_cmd_response *resp_cqe;
        struct bnx2i_cmd *bnx2i_cmd;
        struct iscsi_task *task;
        struct iscsi_scsi_rsp *hdr;
        u32 datalen = 0;

        resp_cqe = (struct bnx2i_cmd_response *)cqe;
        spin_lock_bh(&session->back_lock);
        task = iscsi_itt_to_task(conn,
                                 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
        if (!task)
                goto fail;

        bnx2i_cmd = task->dd_data;

        if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
                conn->datain_pdus_cnt +=
                        resp_cqe->task_stat.read_stat.num_data_ins;
                conn->rxdata_octets +=
                        bnx2i_cmd->req.total_data_transfer_length;
                ADD_STATS_64(hba, rx_pdus,
                             resp_cqe->task_stat.read_stat.num_data_ins);
                ADD_STATS_64(hba, rx_bytes,
                             bnx2i_cmd->req.total_data_transfer_length);
        } else {
                conn->dataout_pdus_cnt +=
                        resp_cqe->task_stat.write_stat.num_data_outs;
                conn->r2t_pdus_cnt +=
                        resp_cqe->task_stat.write_stat.num_r2ts;
                conn->txdata_octets +=
                        bnx2i_cmd->req.total_data_transfer_length;
                ADD_STATS_64(hba, tx_pdus,
                             resp_cqe->task_stat.write_stat.num_data_outs);
                ADD_STATS_64(hba, tx_bytes,
                             bnx2i_cmd->req.total_data_transfer_length);
                ADD_STATS_64(hba, rx_pdus,
                             resp_cqe->task_stat.write_stat.num_r2ts);
        }
        bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);

        hdr = (struct iscsi_scsi_rsp *)task->hdr;
        resp_cqe = (struct bnx2i_cmd_response *)cqe;
        hdr->opcode = resp_cqe->op_code;
        hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
        hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
        hdr->response = resp_cqe->response;
        hdr->cmd_status = resp_cqe->status;
        hdr->flags = resp_cqe->response_flags;
        hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);

        if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
                goto done;

        if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
                datalen = resp_cqe->data_length;
                if (datalen < 2)
                        goto done;

                if (datalen > BNX2I_RQ_WQE_SIZE) {
                        iscsi_conn_printk(KERN_ERR, conn,
                                          "sense data len %d > RQ sz\n",
                                          datalen);
                        datalen = BNX2I_RQ_WQE_SIZE;
                } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
                        iscsi_conn_printk(KERN_ERR, conn,
                                          "sense data len %d > conn data\n",
                                          datalen);
                        datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
                }

                bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
                bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
        }

done:
        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
                             conn->data, datalen);
fail:
        spin_unlock_bh(&session->back_lock);
        return 0;
}


/**
 * bnx2i_process_login_resp - this function handles iscsi login response
 * @session:            iscsi session pointer
 * @bnx2i_conn:         iscsi connection pointer
 * @cqe:                pointer to newly DMA'ed CQE entry for processing
 *
 * process Login Response CQE & complete it to open-iscsi user daemon
 */
static int bnx2i_process_login_resp(struct iscsi_session *session,
                                    struct bnx2i_conn *bnx2i_conn,
                                    struct cqe *cqe)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct iscsi_task *task;
        struct bnx2i_login_response *login;
        struct iscsi_login_rsp *resp_hdr;
        int pld_len;
        int pad_len;

        login = (struct bnx2i_login_response *) cqe;
        spin_lock(&session->back_lock);
        task = iscsi_itt_to_task(conn,
                                 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
        if (!task)
                goto done;

        resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
        resp_hdr->opcode = login->op_code;
        resp_hdr->flags = login->response_flags;
        resp_hdr->max_version = login->version_max;
        resp_hdr->active_version = login->version_active;
        resp_hdr->hlength = 0;

        hton24(resp_hdr->dlength, login->data_length);
        memcpy(resp_hdr->isid, &login->isid_lo, 6);
        resp_hdr->tsih = cpu_to_be16(login->tsih);
        resp_hdr->itt = task->hdr->itt;
        resp_hdr->statsn = cpu_to_be32(login->stat_sn);
        resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
        resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
        resp_hdr->status_class = login->status_class;
        resp_hdr->status_detail = login->status_detail;
        pld_len = login->data_length;
        bnx2i_conn->gen_pdu.resp_wr_ptr =
                                        bnx2i_conn->gen_pdu.resp_buf + pld_len;

        pad_len = 0;
        if (pld_len & 0x3)
                pad_len = 4 - (pld_len % 4);

        if (pad_len) {
                int i = 0;
                for (i = 0; i < pad_len; i++) {
                        bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
                        bnx2i_conn->gen_pdu.resp_wr_ptr++;
                }
        }

        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
                bnx2i_conn->gen_pdu.resp_buf,
                bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
done:
        spin_unlock(&session->back_lock);
        return 0;
}


/**
 * bnx2i_process_text_resp - this function handles iscsi text response
 * @session:    iscsi session pointer
 * @bnx2i_conn: iscsi connection pointer
 * @cqe:        pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI Text Response CQE&  complete it to open-iscsi user daemon
 */
static int bnx2i_process_text_resp(struct iscsi_session *session,
                                   struct bnx2i_conn *bnx2i_conn,
                                   struct cqe *cqe)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct iscsi_task *task;
        struct bnx2i_text_response *text;
        struct iscsi_text_rsp *resp_hdr;
        int pld_len;
        int pad_len;

        text = (struct bnx2i_text_response *) cqe;
        spin_lock(&session->back_lock);
        task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
        if (!task)
                goto done;

        resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
        resp_hdr->opcode = text->op_code;
        resp_hdr->flags = text->response_flags;
        resp_hdr->hlength = 0;

        hton24(resp_hdr->dlength, text->data_length);
        resp_hdr->itt = task->hdr->itt;
        resp_hdr->ttt = cpu_to_be32(text->ttt);
        resp_hdr->statsn = task->hdr->exp_statsn;
        resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
        resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
        pld_len = text->data_length;
        bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
                                          pld_len;
        pad_len = 0;
        if (pld_len & 0x3)
                pad_len = 4 - (pld_len % 4);

        if (pad_len) {
                int i = 0;
                for (i = 0; i < pad_len; i++) {
                        bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
                        bnx2i_conn->gen_pdu.resp_wr_ptr++;
                }
        }
        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
                             bnx2i_conn->gen_pdu.resp_buf,
                             bnx2i_conn->gen_pdu.resp_wr_ptr -
                             bnx2i_conn->gen_pdu.resp_buf);
done:
        spin_unlock(&session->back_lock);
        return 0;
}


/**
 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
 * @session:            iscsi session pointer
 * @bnx2i_conn:         iscsi connection pointer
 * @cqe:                pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI TMF Response CQE and wake up the driver eh thread.
 */
static int bnx2i_process_tmf_resp(struct iscsi_session *session,
                                  struct bnx2i_conn *bnx2i_conn,
                                  struct cqe *cqe)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct iscsi_task *task;
        struct bnx2i_tmf_response *tmf_cqe;
        struct iscsi_tm_rsp *resp_hdr;

        tmf_cqe = (struct bnx2i_tmf_response *)cqe;
        spin_lock(&session->back_lock);
        task = iscsi_itt_to_task(conn,
                                 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
        if (!task)
                goto done;

        resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
        resp_hdr->opcode = tmf_cqe->op_code;
        resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
        resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
        resp_hdr->itt = task->hdr->itt;
        resp_hdr->response = tmf_cqe->response;

        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
done:
        spin_unlock(&session->back_lock);
        return 0;
}

/**
 * bnx2i_process_logout_resp - this function handles iscsi logout response
 * @session:            iscsi session pointer
 * @bnx2i_conn:         iscsi connection pointer
 * @cqe:                pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI Logout Response CQE & make function call to
 * notify the user daemon.
 */
static int bnx2i_process_logout_resp(struct iscsi_session *session,
                                     struct bnx2i_conn *bnx2i_conn,
                                     struct cqe *cqe)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct iscsi_task *task;
        struct bnx2i_logout_response *logout;
        struct iscsi_logout_rsp *resp_hdr;

        logout = (struct bnx2i_logout_response *) cqe;
        spin_lock(&session->back_lock);
        task = iscsi_itt_to_task(conn,
                                 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
        if (!task)
                goto done;

        resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
        resp_hdr->opcode = logout->op_code;
        resp_hdr->flags = logout->response;
        resp_hdr->hlength = 0;

        resp_hdr->itt = task->hdr->itt;
        resp_hdr->statsn = task->hdr->exp_statsn;
        resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
        resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);

        resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
        resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);

        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);

        bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
done:
        spin_unlock(&session->back_lock);
        return 0;
}

/**
 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
 * @session:            iscsi session pointer
 * @bnx2i_conn:         iscsi connection pointer
 * @cqe:                pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
 */
static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
                                           struct bnx2i_conn *bnx2i_conn,
                                           struct cqe *cqe)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct bnx2i_nop_in_msg *nop_in;
        struct iscsi_task *task;

        nop_in = (struct bnx2i_nop_in_msg *)cqe;
        spin_lock(&session->back_lock);
        task = iscsi_itt_to_task(conn,
                                 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
        if (task)
                __iscsi_put_task(task);
        spin_unlock(&session->back_lock);
}

/**
 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
 * @conn:       iscsi connection
 *
 * Firmware advances RQ producer index for every unsolicited PDU even if
 *      payload data length is '0'. This function makes corresponding
 *      adjustments on the driver side to match this f/w behavior
 */
static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
{
        char dummy_rq_data[2];
        bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
        bnx2i_put_rq_buf(bnx2i_conn, 1);
}


/**
 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
 * @session:            iscsi session pointer
 * @bnx2i_conn:         iscsi connection pointer
 * @cqe:                pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI target's proactive iSCSI NOPIN request
 */
static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
                                     struct bnx2i_conn *bnx2i_conn,
                                     struct cqe *cqe)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct iscsi_task *task;
        struct bnx2i_nop_in_msg *nop_in;
        struct iscsi_nopin *hdr;
        int tgt_async_nop = 0;

        nop_in = (struct bnx2i_nop_in_msg *)cqe;

        spin_lock(&session->back_lock);
        hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
        memset(hdr, 0, sizeof(struct iscsi_hdr));
        hdr->opcode = nop_in->op_code;
        hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
        hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
        hdr->ttt = cpu_to_be32(nop_in->ttt);

        if (nop_in->itt == (u16) RESERVED_ITT) {
                bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
                hdr->itt = RESERVED_ITT;
                tgt_async_nop = 1;
                goto done;
        }

        /* this is a response to one of our nop-outs */
        task = iscsi_itt_to_task(conn,
                         (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
        if (task) {
                hdr->flags = ISCSI_FLAG_CMD_FINAL;
                hdr->itt = task->hdr->itt;
                hdr->ttt = cpu_to_be32(nop_in->ttt);
                memcpy(&hdr->lun, nop_in->lun, 8);
        }
done:
        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
        spin_unlock(&session->back_lock);

        return tgt_async_nop;
}


/**
 * bnx2i_process_async_mesg - this function handles iscsi async message
 * @session:            iscsi session pointer
 * @bnx2i_conn:         iscsi connection pointer
 * @cqe:                pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI ASYNC Message
 */
static void bnx2i_process_async_mesg(struct iscsi_session *session,
                                     struct bnx2i_conn *bnx2i_conn,
                                     struct cqe *cqe)
{
        struct bnx2i_async_msg *async_cqe;
        struct iscsi_async *resp_hdr;
        u8 async_event;

        bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);

        async_cqe = (struct bnx2i_async_msg *)cqe;
        async_event = async_cqe->async_event;

        if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
                iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
                                  "async: scsi events not supported\n");
                return;
        }

        spin_lock(&session->back_lock);
        resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
        resp_hdr->opcode = async_cqe->op_code;
        resp_hdr->flags = 0x80;

        memcpy(&resp_hdr->lun, async_cqe->lun, 8);
        resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
        resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);

        resp_hdr->async_event = async_cqe->async_event;
        resp_hdr->async_vcode = async_cqe->async_vcode;

        resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
        resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
        resp_hdr->param3 = cpu_to_be16(async_cqe->param3);

        __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
                             (struct iscsi_hdr *)resp_hdr, NULL, 0);
        spin_unlock(&session->back_lock);
}


/**
 * bnx2i_process_reject_mesg - process iscsi reject pdu
 * @session:            iscsi session pointer
 * @bnx2i_conn:         iscsi connection pointer
 * @cqe:                pointer to newly DMA'ed CQE entry for processing
 *
 * process iSCSI REJECT message
 */
static void bnx2i_process_reject_mesg(struct iscsi_session *session,
                                      struct bnx2i_conn *bnx2i_conn,
                                      struct cqe *cqe)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct bnx2i_reject_msg *reject;
        struct iscsi_reject *hdr;

        reject = (struct bnx2i_reject_msg *) cqe;
        if (reject->data_length) {
                bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
                bnx2i_put_rq_buf(bnx2i_conn, 1);
        } else
                bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);

        spin_lock(&session->back_lock);
        hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
        memset(hdr, 0, sizeof(struct iscsi_hdr));
        hdr->opcode = reject->op_code;
        hdr->reason = reject->reason;
        hton24(hdr->dlength, reject->data_length);
        hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
        hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
        hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
                             reject->data_length);
        spin_unlock(&session->back_lock);
}

/**
 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
 * @session:            iscsi session pointer
 * @bnx2i_conn:         iscsi connection pointer
 * @cqe:                pointer to newly DMA'ed CQE entry for processing
 *
 * process command cleanup response CQE during conn shutdown or error recovery
 */
static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
                                           struct bnx2i_conn *bnx2i_conn,
                                           struct cqe *cqe)
{
        struct bnx2i_cleanup_response *cmd_clean_rsp;
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct iscsi_task *task;

        cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
        spin_lock(&session->back_lock);
        task = iscsi_itt_to_task(conn,
                        cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
        if (!task)
                printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
                        cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
        spin_unlock(&session->back_lock);
        complete(&bnx2i_conn->cmd_cleanup_cmpl);
}


/**
 * bnx2i_percpu_io_thread - thread per cpu for ios
 *
 * @arg:        ptr to bnx2i_percpu_info structure
 */
int bnx2i_percpu_io_thread(void *arg)
{
        struct bnx2i_percpu_s *p = arg;
        struct bnx2i_work *work, *tmp;
        LIST_HEAD(work_list);

        set_user_nice(current, MIN_NICE);

        while (!kthread_should_stop()) {
                spin_lock_bh(&p->p_work_lock);
                while (!list_empty(&p->work_list)) {
                        list_splice_init(&p->work_list, &work_list);
                        spin_unlock_bh(&p->p_work_lock);

                        list_for_each_entry_safe(work, tmp, &work_list, list) {
                                list_del_init(&work->list);
                                /* work allocated in the bh, freed here */
                                bnx2i_process_scsi_cmd_resp(work->session,
                                                            work->bnx2i_conn,
                                                            &work->cqe);
                                atomic_dec(&work->bnx2i_conn->work_cnt);
                                kfree(work);
                        }
                        spin_lock_bh(&p->p_work_lock);
                }
                set_current_state(TASK_INTERRUPTIBLE);
                spin_unlock_bh(&p->p_work_lock);
                schedule();
        }
        __set_current_state(TASK_RUNNING);

        return 0;
}


/**
 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
 * @bnx2i_conn:         bnx2i connection
 *
 * this function is called by generic KCQ handler to queue all pending cmd
 * completion CQEs
 *
 * The implementation is to queue the cmd response based on the
 * last recorded command for the given connection.  The
 * cpu_id gets recorded upon task_xmit.  No out-of-order completion!
 */
static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
                                     struct bnx2i_conn *bnx2i_conn,
                                     struct bnx2i_nop_in_msg *cqe)
{
        struct bnx2i_work *bnx2i_work = NULL;
        struct bnx2i_percpu_s *p = NULL;
        struct iscsi_task *task;
        struct scsi_cmnd *sc;
        int rc = 0;
        int cpu;

        spin_lock(&session->back_lock);
        task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
                                 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
        if (!task || !task->sc) {
                spin_unlock(&session->back_lock);
                return -EINVAL;
        }
        sc = task->sc;

        if (!blk_rq_cpu_valid(sc->request))
                cpu = smp_processor_id();
        else
                cpu = sc->request->cpu;

        spin_unlock(&session->back_lock);

        p = &per_cpu(bnx2i_percpu, cpu);
        spin_lock(&p->p_work_lock);
        if (unlikely(!p->iothread)) {
                rc = -EINVAL;
                goto err;
        }
        /* Alloc and copy to the cqe */
        bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
        if (bnx2i_work) {
                INIT_LIST_HEAD(&bnx2i_work->list);
                bnx2i_work->session = session;
                bnx2i_work->bnx2i_conn = bnx2i_conn;
                memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
                list_add_tail(&bnx2i_work->list, &p->work_list);
                atomic_inc(&bnx2i_conn->work_cnt);
                wake_up_process(p->iothread);
                spin_unlock(&p->p_work_lock);
                goto done;
        } else
                rc = -ENOMEM;
err:
        spin_unlock(&p->p_work_lock);
        bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
done:
        return rc;
}


/**
 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
 * @bnx2i_conn:         bnx2i connection
 *
 * this function is called by generic KCQ handler to process all pending CQE's
 */
static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
{
        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
        struct iscsi_session *session = conn->session;
        struct bnx2i_hba *hba = bnx2i_conn->hba;
        struct qp_info *qp;
        struct bnx2i_nop_in_msg *nopin;
        int tgt_async_msg;
        int cqe_cnt = 0;

        if (bnx2i_conn->ep == NULL)
                return 0;

        qp = &bnx2i_conn->ep->qp;

        if (!qp->cq_virt) {
                printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
                       hba->netdev->name);
                goto out;
        }
        while (1) {
                nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
                if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
                        break;

                if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
                        if (nopin->op_code == ISCSI_OP_NOOP_IN &&
                            nopin->itt == (u16) RESERVED_ITT) {
                                printk(KERN_ALERT "bnx2i: Unsolicited "
                                       "NOP-In detected for suspended "
                                       "connection dev=%s!\n",
                                       hba->netdev->name);
                                bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
                                goto cqe_out;
                        }
                        break;
                }
                tgt_async_msg = 0;

                switch (nopin->op_code) {
                case ISCSI_OP_SCSI_CMD_RSP:
                case ISCSI_OP_SCSI_DATA_IN:
                        /* Run the kthread engine only for data cmds
                           All other cmds will be completed in this bh! */
                        bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
                        goto done;
                case ISCSI_OP_LOGIN_RSP:
                        bnx2i_process_login_resp(session, bnx2i_conn,
                                                 qp->cq_cons_qe);
                        break;
                case ISCSI_OP_SCSI_TMFUNC_RSP:
                        bnx2i_process_tmf_resp(session, bnx2i_conn,
                                               qp->cq_cons_qe);
                        break;
                case ISCSI_OP_TEXT_RSP:
                        bnx2i_process_text_resp(session, bnx2i_conn,
                                                qp->cq_cons_qe);
                        break;
                case ISCSI_OP_LOGOUT_RSP:
                        bnx2i_process_logout_resp(session, bnx2i_conn,
                                                  qp->cq_cons_qe);
                        break;
                case ISCSI_OP_NOOP_IN:
                        if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
                                                     qp->cq_cons_qe))
                                tgt_async_msg = 1;
                        break;
                case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
                        bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
                                                       qp->cq_cons_qe);
                        break;
                case ISCSI_OP_ASYNC_EVENT:
                        bnx2i_process_async_mesg(session, bnx2i_conn,
                                                 qp->cq_cons_qe);
                        tgt_async_msg = 1;
                        break;
                case ISCSI_OP_REJECT:
                        bnx2i_process_reject_mesg(session, bnx2i_conn,
                                                  qp->cq_cons_qe);
                        break;
                case ISCSI_OPCODE_CLEANUP_RESPONSE:
                        bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
                                                       qp->cq_cons_qe);
                        break;
                default:
                        printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
                                          nopin->op_code);
                }

                ADD_STATS_64(hba, rx_pdus, 1);
                ADD_STATS_64(hba, rx_bytes, nopin->data_length);
done:
                if (!tgt_async_msg) {
                        if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
                                printk(KERN_ALERT "bnx2i (%s): no active cmd! "
                                       "op 0x%x\n",
                                       hba->netdev->name,
                                       nopin->op_code);
                        else
                                atomic_dec(&bnx2i_conn->ep->num_active_cmds);
                }
cqe_out:
                /* clear out in production version only, till beta keep opcode
                 * field intact, will be helpful in debugging (context dump)
                 * nopin->op_code = 0;
                 */
                cqe_cnt++;
                qp->cqe_exp_seq_sn++;
                if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
                        qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;

                if (qp->cq_cons_qe == qp->cq_last_qe) {
                        qp->cq_cons_qe = qp->cq_first_qe;
                        qp->cq_cons_idx = 0;
                } else {
                        qp->cq_cons_qe++;
                        qp->cq_cons_idx++;
                }
        }
out:
        return cqe_cnt;
}

/**
 * bnx2i_fastpath_notification - process global event queue (KCQ)
 * @hba:                adapter structure pointer
 * @new_cqe_kcqe:       pointer to newly DMA'ed KCQE entry
 *
 * Fast path event notification handler, KCQ entry carries context id
 *      of the connection that has 1 or more pending CQ entries
 */
static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
                                        struct iscsi_kcqe *new_cqe_kcqe)
{
        struct bnx2i_conn *bnx2i_conn;
        u32 iscsi_cid;
        int nxt_idx;

        iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
        bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);

        if (!bnx2i_conn) {
                printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
                return;
        }
        if (!bnx2i_conn->ep) {
                printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
                return;
        }

        bnx2i_process_new_cqes(bnx2i_conn);
        nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
                                                CNIC_ARM_CQE_FP);
        if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
                bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
}


/**
 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
 * @hba:                adapter structure pointer
 * @update_kcqe:        kcqe pointer
 *
 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
 */
static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
                                           struct iscsi_kcqe *update_kcqe)
{
        struct bnx2i_conn *conn;
        u32 iscsi_cid;

        iscsi_cid = update_kcqe->iscsi_conn_id;
        conn = bnx2i_get_conn_from_id(hba, iscsi_cid);

        if (!conn) {
                printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
                return;
        }
        if (!conn->ep) {
                printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
                return;
        }

        if (update_kcqe->completion_status) {
                printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
                conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
        } else
                conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;

        wake_up_interruptible(&conn->ep->ofld_wait);
}


/**
 * bnx2i_recovery_que_add_conn - add connection to recovery queue
 * @hba:                adapter structure pointer
 * @bnx2i_conn:         iscsi connection
 *
 * Add connection to recovery queue and schedule adapter eh worker
 */
static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
                                        struct bnx2i_conn *bnx2i_conn)
{
        iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
                           ISCSI_ERR_CONN_FAILED);
}


/**
 * bnx2i_process_tcp_error - process error notification on a given connection
 *
 * @hba:                adapter structure pointer
 * @tcp_err:            tcp error kcqe pointer
 *
 * handles tcp level error notifications from FW.
 */
static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
                                    struct iscsi_kcqe *tcp_err)
{
        struct bnx2i_conn *bnx2i_conn;
        u32 iscsi_cid;

        iscsi_cid = tcp_err->iscsi_conn_id;
        bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);

        if (!bnx2i_conn) {
                printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
                return;
        }

        printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
                          iscsi_cid, tcp_err->completion_status);
        bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
}


/**
 * bnx2i_process_iscsi_error - process error notification on a given connection
 * @hba:                adapter structure pointer
 * @iscsi_err:          iscsi error kcqe pointer
 *
 * handles iscsi error notifications from the FW. Firmware based in initial
 *      handshake classifies iscsi protocol / TCP rfc violation into either
 *      warning or error indications. If indication is of "Error" type, driver
 *      will initiate session recovery for that connection/session. For
 *      "Warning" type indication, driver will put out a system log message
 *      (there will be only one message for each type for the life of the
 *      session, this is to avoid un-necessarily overloading the system)
 */
static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
                                      struct iscsi_kcqe *iscsi_err)
{
        struct bnx2i_conn *bnx2i_conn;
        u32 iscsi_cid;
        char warn_notice[] = "iscsi_warning";
        char error_notice[] = "iscsi_error";
        char additional_notice[64];
        char *message;
        int need_recovery;
        u64 err_mask64;

        iscsi_cid = iscsi_err->iscsi_conn_id;
        bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
        if (!bnx2i_conn) {
                printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
                return;
        }

        err_mask64 = (0x1ULL << iscsi_err->completion_status);

        if (err_mask64 & iscsi_error_mask) {
                need_recovery = 0;
                message = warn_notice;
        } else {
                need_recovery = 1;
                message = error_notice;
        }

        switch (iscsi_err->completion_status) {
        case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
                strcpy(additional_notice, "hdr digest err");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
                strcpy(additional_notice, "data digest err");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
                strcpy(additional_notice, "wrong opcode rcvd");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
                strcpy(additional_notice, "AHS len > 0 rcvd");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
                strcpy(additional_notice, "invalid ITT rcvd");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
                strcpy(additional_notice, "wrong StatSN rcvd");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
                strcpy(additional_notice, "wrong DataSN rcvd");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
                strcpy(additional_notice, "pend R2T violation");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
                strcpy(additional_notice, "ERL0, UO");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
                strcpy(additional_notice, "ERL0, U1");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
                strcpy(additional_notice, "ERL0, U2");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
                strcpy(additional_notice, "ERL0, U3");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
                strcpy(additional_notice, "ERL0, U4");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
                strcpy(additional_notice, "ERL0, U5");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
                strcpy(additional_notice, "ERL0, U6");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
                strcpy(additional_notice, "invalid resi len");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
                strcpy(additional_notice, "MRDSL violation");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
                strcpy(additional_notice, "F-bit not set");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
                strcpy(additional_notice, "invalid TTT");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
                strcpy(additional_notice, "invalid DataSN");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
                strcpy(additional_notice, "burst len violation");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
                strcpy(additional_notice, "buf offset violation");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
                strcpy(additional_notice, "invalid LUN field");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
                strcpy(additional_notice, "invalid R2TSN field");
                break;
#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0       \
        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
        case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
                strcpy(additional_notice, "invalid cmd len1");
                break;
#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1       \
        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
        case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
                strcpy(additional_notice, "invalid cmd len2");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
                strcpy(additional_notice,
                       "pend r2t exceeds MaxOutstandingR2T value");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
                strcpy(additional_notice, "TTT is rsvd");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
                strcpy(additional_notice, "MBL violation");
                break;
#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO         \
        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
        case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
                strcpy(additional_notice, "data seg len != 0");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
                strcpy(additional_notice, "reject pdu len error");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
                strcpy(additional_notice, "async pdu len error");
                break;
        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
                strcpy(additional_notice, "nopin pdu len error");
                break;
#define BNX2_ERR_PEND_R2T_IN_CLEANUP                    \
        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
        case BNX2_ERR_PEND_R2T_IN_CLEANUP:
                strcpy(additional_notice, "pend r2t in cleanup");
                break;

        case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
                strcpy(additional_notice, "IP fragments rcvd");
                break;
        case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
                strcpy(additional_notice, "IP options error");
                break;
        case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
                strcpy(additional_notice, "urgent flag error");
                break;
        default:
                printk(KERN_ALERT "iscsi_err - unknown err %x\n",
                                  iscsi_err->completion_status);
        }

        if (need_recovery) {
                iscsi_conn_printk(KERN_ALERT,
                                  bnx2i_conn->cls_conn->dd_data,
                                  "bnx2i: %s - %s\n",
                                  message, additional_notice);

                iscsi_conn_printk(KERN_ALERT,
                                  bnx2i_conn->cls_conn->dd_data,
                                  "conn_err - hostno %d conn %p, "
                                  "iscsi_cid %x cid %x\n",
                                  bnx2i_conn->hba->shost->host_no,
                                  bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
                                  bnx2i_conn->ep->ep_cid);
                bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
        } else
                if (!test_and_set_bit(iscsi_err->completion_status,
                                      (void *) &bnx2i_conn->violation_notified))
                        iscsi_conn_printk(KERN_ALERT,
                                          bnx2i_conn->cls_conn->dd_data,
                                          "bnx2i: %s - %s\n",
                                          message, additional_notice);
}


/**
 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
 * @hba:                adapter structure pointer
 * @conn_destroy:       conn destroy kcqe pointer
 *
 * handles connection destroy completion request.
 */
static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
                                            struct iscsi_kcqe *conn_destroy)
{
        struct bnx2i_endpoint *ep;

        ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
        if (!ep) {
                printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
                                  "offload request, unexpected completion\n");
                return;
        }

        if (hba != ep->hba) {
                printk(KERN_ALERT "conn destroy- error hba mis-match\n");
                return;
        }

        if (conn_destroy->completion_status) {
                printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
                ep->state = EP_STATE_CLEANUP_FAILED;
        } else
                ep->state = EP_STATE_CLEANUP_CMPL;
        wake_up_interruptible(&ep->ofld_wait);
}


/**
 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
 * @hba:                adapter structure pointer
 * @ofld_kcqe:          conn offload kcqe pointer
 *
 * handles initial connection offload completion, ep_connect() thread is
 *      woken-up to continue with LLP connect process
 */
static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
                                    struct iscsi_kcqe *ofld_kcqe)
{
        u32 cid_addr;
        struct bnx2i_endpoint *ep;
        u32 cid_num;

        ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
        if (!ep) {
                printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
                return;
        }

        if (hba != ep->hba) {
                printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
                return;
        }

        if (ofld_kcqe->completion_status) {
                ep->state = EP_STATE_OFLD_FAILED;
                if (ofld_kcqe->completion_status ==
                    ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
                        printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
                                "to allocate iSCSI context resources\n",
                                hba->netdev->name);
                else if (ofld_kcqe->completion_status ==
                         ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
                        printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
                                "opcode\n", hba->netdev->name);
                else if (ofld_kcqe->completion_status ==
                         ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
                        /* error status code valid only for 5771x chipset */
                        ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
                else
                        printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
                                "error code %d\n", hba->netdev->name,
                                ofld_kcqe->completion_status);
        } else {
                ep->state = EP_STATE_OFLD_COMPL;
                cid_addr = ofld_kcqe->iscsi_conn_context_id;
                cid_num = bnx2i_get_cid_num(ep);
                ep->ep_cid = cid_addr;
                ep->qp.ctx_base = NULL;
        }
        wake_up_interruptible(&ep->ofld_wait);
}

/**
 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
 * @hba:                adapter structure pointer
 * @update_kcqe:        kcqe pointer
 *
 * Generic KCQ event handler/dispatcher
 */
static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
                                u32 num_cqe)
{
        struct bnx2i_hba *hba = context;
        int i = 0;
        struct iscsi_kcqe *ikcqe = NULL;

        while (i < num_cqe) {
                ikcqe = (struct iscsi_kcqe *) kcqe[i++];

                if (ikcqe->op_code ==
                    ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
                        bnx2i_fastpath_notification(hba, ikcqe);
                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
                        bnx2i_process_ofld_cmpl(hba, ikcqe);
                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
                        bnx2i_process_update_conn_cmpl(hba, ikcqe);
                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
                        if (ikcqe->completion_status !=
                            ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
                                bnx2i_iscsi_license_error(hba, ikcqe->\
                                                          completion_status);
                        else {
                                set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
                                bnx2i_get_link_state(hba);
                                printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
                                                 "ISCSI_INIT passed\n",
                                                 (u8)hba->pcidev->bus->number,
                                                 hba->pci_devno,
                                                 (u8)hba->pci_func);


                        }
                } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
                        bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
                        bnx2i_process_iscsi_error(hba, ikcqe);
                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
                        bnx2i_process_tcp_error(hba, ikcqe);
                else
                        printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
                                          ikcqe->op_code);
        }
}


/**
 * bnx2i_indicate_netevent - Generic netdev event handler
 * @context:    adapter structure pointer
 * @event:      event type
 * @vlan_id:    vlans id - associated vlan id with this event
 *
 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
 *      NETDEV_GOING_DOWN and NETDEV_CHANGE
 */
static void bnx2i_indicate_netevent(void *context, unsigned long event,
                                    u16 vlan_id)
{
        struct bnx2i_hba *hba = context;

        /* Ignore all netevent coming from vlans */
        if (vlan_id != 0)
                return;

        switch (event) {
        case NETDEV_UP:
                if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
                        bnx2i_send_fw_iscsi_init_msg(hba);
                break;
        case NETDEV_DOWN:
                clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
                clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
                break;
        case NETDEV_GOING_DOWN:
                set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
                iscsi_host_for_each_session(hba->shost,
                                            bnx2i_drop_session);
                break;
        case NETDEV_CHANGE:
                bnx2i_get_link_state(hba);
                break;
        default:
                ;
        }
}


/**
 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
 * @cm_sk:              cnic sock structure pointer
 *
 * function callback exported via bnx2i - cnic driver interface to
 *      indicate completion of option-2 TCP connect request.
 */
static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
{
        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;

        if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
                ep->state = EP_STATE_CONNECT_FAILED;
        else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
                ep->state = EP_STATE_CONNECT_COMPL;
        else
                ep->state = EP_STATE_CONNECT_FAILED;

        wake_up_interruptible(&ep->ofld_wait);
}


/**
 * bnx2i_cm_close_cmpl - process tcp conn close completion
 * @cm_sk:      cnic sock structure pointer
 *
 * function callback exported via bnx2i - cnic driver interface to
 *      indicate completion of option-2 graceful TCP connect shutdown
 */
static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
{
        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;

        ep->state = EP_STATE_DISCONN_COMPL;
        wake_up_interruptible(&ep->ofld_wait);
}


/**
 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
 * @cm_sk:      cnic sock structure pointer
 *
 * function callback exported via bnx2i - cnic driver interface to
 *      indicate completion of option-2 abortive TCP connect termination
 */
static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
{
        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;

        ep->state = EP_STATE_DISCONN_COMPL;
        wake_up_interruptible(&ep->ofld_wait);
}


/**
 * bnx2i_cm_remote_close - process received TCP FIN
 * @hba:                adapter structure pointer
 * @update_kcqe:        kcqe pointer
 *
 * function callback exported via bnx2i - cnic driver interface to indicate
 *      async TCP events such as FIN
 */
static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
{
        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;

        ep->state = EP_STATE_TCP_FIN_RCVD;
        if (ep->conn)
                bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
}

/**
 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
 * @hba:                adapter structure pointer
 * @update_kcqe:        kcqe pointer
 *
 * function callback exported via bnx2i - cnic driver interface to
 *      indicate async TCP events (RST) sent by the peer.
 */
static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
{
        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
        u32 old_state = ep->state;

        ep->state = EP_STATE_TCP_RST_RCVD;
        if (old_state == EP_STATE_DISCONN_START)
                wake_up_interruptible(&ep->ofld_wait);
        else
                if (ep->conn)
                        bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
}


static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
                              char *buf, u16 buflen)
{
        struct bnx2i_hba *hba = context;
        int rc;

        if (!hba)
                return -ENODEV;

        rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
                                msg_type, buf, buflen);
        if (rc)
                printk(KERN_ALERT "bnx2i: private nl message send error\n");

        return rc;
}


/**
 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
 *                      carrying callback function pointers
 *
 */
struct cnic_ulp_ops bnx2i_cnic_cb = {
        .cnic_init = bnx2i_ulp_init,
        .cnic_exit = bnx2i_ulp_exit,
        .cnic_start = bnx2i_start,
        .cnic_stop = bnx2i_stop,
        .indicate_kcqes = bnx2i_indicate_kcqe,
        .indicate_netevent = bnx2i_indicate_netevent,
        .cm_connect_complete = bnx2i_cm_connect_cmpl,
        .cm_close_complete = bnx2i_cm_close_cmpl,
        .cm_abort_complete = bnx2i_cm_abort_cmpl,
        .cm_remote_close = bnx2i_cm_remote_close,
        .cm_remote_abort = bnx2i_cm_remote_abort,
        .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
        .cnic_get_stats = bnx2i_get_stats,
        .owner = THIS_MODULE
};


/**
 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
 * @ep: bnx2i endpoint
 *
 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
 *      register in BAR #0. Whereas in 57710 these register are accessed by
 *      mapping BAR #1
 */
int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
{
        u32 cid_num;
        u32 reg_off;
        u32 first_l4l5;
        u32 ctx_sz;
        u32 config2;
        resource_size_t reg_base;

        cid_num = bnx2i_get_cid_num(ep);

        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
                reg_base = pci_resource_start(ep->hba->pcidev,
                                              BNX2X_DOORBELL_PCI_BAR);
                reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
                ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
                goto arm_cq;
        }

        if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
            (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
                config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
                first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
                ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
                if (ctx_sz)
                        reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
                                  + BNX2I_570X_PAGE_SIZE_DEFAULT *
                                  (((cid_num - first_l4l5) / ctx_sz) + 256);
                else
                        reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
        } else
                /* 5709 device in normal node and 5706/5708 devices */
                reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);

        ep->qp.ctx_base = ioremap_nocache(ep->hba->reg_base + reg_off,
                                          MB_KERNEL_CTX_SIZE);
        if (!ep->qp.ctx_base)
                return -ENOMEM;

arm_cq:
        bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
        return 0;
}