bnx2fc_hwi.c

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/* bnx2fc_hwi.c: Broadcom NetXtreme II Linux FCoE offload driver.
 * This file contains the code that low level functions that interact
 * with 57712 FCoE firmware.
 *
 * Copyright (c) 2008 - 2011 Broadcom 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: Bhanu Prakash Gollapudi ([email protected])
 */

#include "bnx2fc.h"

DECLARE_PER_CPU(struct bnx2fc_percpu_s, bnx2fc_percpu);

static void bnx2fc_fastpath_notification(struct bnx2fc_hba *hba,
                    struct fcoe_kcqe *new_cqe_kcqe);
static void bnx2fc_process_ofld_cmpl(struct bnx2fc_hba *hba,
                    struct fcoe_kcqe *ofld_kcqe);
static void bnx2fc_process_enable_conn_cmpl(struct bnx2fc_hba *hba,
                        struct fcoe_kcqe *ofld_kcqe);
static void bnx2fc_init_failure(struct bnx2fc_hba *hba, u32 err_code);
static void bnx2fc_process_conn_destroy_cmpl(struct bnx2fc_hba *hba,
                    struct fcoe_kcqe *destroy_kcqe);

int bnx2fc_send_stat_req(struct bnx2fc_hba *hba)
{
    struct fcoe_kwqe_stat stat_req;
    struct kwqe *kwqe_arr[2];
    int num_kwqes = 1;
    int rc = 0;

    memset(&stat_req, 0x00, sizeof(struct fcoe_kwqe_stat));
    stat_req.hdr.op_code = FCOE_KWQE_OPCODE_STAT;
    stat_req.hdr.flags =
        (FCOE_KWQE_LAYER_CODE << FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);

    stat_req.stat_params_addr_lo = (u32) hba->stats_buf_dma;
    stat_req.stat_params_addr_hi = (u32) ((u64)hba->stats_buf_dma >> 32);

    kwqe_arr[0] = (struct kwqe *) &stat_req;

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

    return rc;
}

int bnx2fc_send_fw_fcoe_init_msg(struct bnx2fc_hba *hba)
{
    struct fcoe_kwqe_init1 fcoe_init1;
    struct fcoe_kwqe_init2 fcoe_init2;
    struct fcoe_kwqe_init3 fcoe_init3;
    struct kwqe *kwqe_arr[3];
    int num_kwqes = 3;
    int rc = 0;

    if (!hba->cnic) {
        printk(KERN_ERR PFX "hba->cnic NULL during fcoe fw init\n");
        return -ENODEV;
    }

    /* fill init1 KWQE */
    memset(&fcoe_init1, 0x00, sizeof(struct fcoe_kwqe_init1));
    fcoe_init1.hdr.op_code = FCOE_KWQE_OPCODE_INIT1;
    fcoe_init1.hdr.flags = (FCOE_KWQE_LAYER_CODE <<
                    FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);

    fcoe_init1.num_tasks = BNX2FC_MAX_TASKS;
    fcoe_init1.sq_num_wqes = BNX2FC_SQ_WQES_MAX;
    fcoe_init1.rq_num_wqes = BNX2FC_RQ_WQES_MAX;
    fcoe_init1.rq_buffer_log_size = BNX2FC_RQ_BUF_LOG_SZ;
    fcoe_init1.cq_num_wqes = BNX2FC_CQ_WQES_MAX;
    fcoe_init1.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
    fcoe_init1.dummy_buffer_addr_hi = (u32) ((u64)hba->dummy_buf_dma >> 32);
    fcoe_init1.task_list_pbl_addr_lo = (u32) hba->task_ctx_bd_dma;
    fcoe_init1.task_list_pbl_addr_hi =
                (u32) ((u64) hba->task_ctx_bd_dma >> 32);
    fcoe_init1.mtu = BNX2FC_MINI_JUMBO_MTU;

    fcoe_init1.flags = (PAGE_SHIFT <<
                FCOE_KWQE_INIT1_LOG_PAGE_SIZE_SHIFT);

    fcoe_init1.num_sessions_log = BNX2FC_NUM_MAX_SESS_LOG;

    /* fill init2 KWQE */
    memset(&fcoe_init2, 0x00, sizeof(struct fcoe_kwqe_init2));
    fcoe_init2.hdr.op_code = FCOE_KWQE_OPCODE_INIT2;
    fcoe_init2.hdr.flags = (FCOE_KWQE_LAYER_CODE <<
                    FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);

    fcoe_init2.hsi_major_version = FCOE_HSI_MAJOR_VERSION;
    fcoe_init2.hsi_minor_version = FCOE_HSI_MINOR_VERSION;


    fcoe_init2.hash_tbl_pbl_addr_lo = (u32) hba->hash_tbl_pbl_dma;
    fcoe_init2.hash_tbl_pbl_addr_hi = (u32)
                       ((u64) hba->hash_tbl_pbl_dma >> 32);

    fcoe_init2.t2_hash_tbl_addr_lo = (u32) hba->t2_hash_tbl_dma;
    fcoe_init2.t2_hash_tbl_addr_hi = (u32)
                      ((u64) hba->t2_hash_tbl_dma >> 32);

    fcoe_init2.t2_ptr_hash_tbl_addr_lo = (u32) hba->t2_hash_tbl_ptr_dma;
    fcoe_init2.t2_ptr_hash_tbl_addr_hi = (u32)
                    ((u64) hba->t2_hash_tbl_ptr_dma >> 32);

    fcoe_init2.free_list_count = BNX2FC_NUM_MAX_SESS;

    /* fill init3 KWQE */
    memset(&fcoe_init3, 0x00, sizeof(struct fcoe_kwqe_init3));
    fcoe_init3.hdr.op_code = FCOE_KWQE_OPCODE_INIT3;
    fcoe_init3.hdr.flags = (FCOE_KWQE_LAYER_CODE <<
                    FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);
    fcoe_init3.error_bit_map_lo = 0xffffffff;
    fcoe_init3.error_bit_map_hi = 0xffffffff;

    fcoe_init3.perf_config = 1;

    kwqe_arr[0] = (struct kwqe *) &fcoe_init1;
    kwqe_arr[1] = (struct kwqe *) &fcoe_init2;
    kwqe_arr[2] = (struct kwqe *) &fcoe_init3;

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

    return rc;
}
int bnx2fc_send_fw_fcoe_destroy_msg(struct bnx2fc_hba *hba)
{
    struct fcoe_kwqe_destroy fcoe_destroy;
    struct kwqe *kwqe_arr[2];
    int num_kwqes = 1;
    int rc = -1;

    /* fill destroy KWQE */
    memset(&fcoe_destroy, 0x00, sizeof(struct fcoe_kwqe_destroy));
    fcoe_destroy.hdr.op_code = FCOE_KWQE_OPCODE_DESTROY;
    fcoe_destroy.hdr.flags = (FCOE_KWQE_LAYER_CODE <<
                    FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);
    kwqe_arr[0] = (struct kwqe *) &fcoe_destroy;

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

int bnx2fc_send_session_ofld_req(struct fcoe_port *port,
                    struct bnx2fc_rport *tgt)
{
    struct fc_lport *lport = port->lport;
    struct bnx2fc_interface *interface = port->priv;
    struct fcoe_ctlr *ctlr = bnx2fc_to_ctlr(interface);
    struct bnx2fc_hba *hba = interface->hba;
    struct kwqe *kwqe_arr[4];
    struct fcoe_kwqe_conn_offload1 ofld_req1;
    struct fcoe_kwqe_conn_offload2 ofld_req2;
    struct fcoe_kwqe_conn_offload3 ofld_req3;
    struct fcoe_kwqe_conn_offload4 ofld_req4;
    struct fc_rport_priv *rdata = tgt->rdata;
    struct fc_rport *rport = tgt->rport;
    int num_kwqes = 4;
    u32 port_id;
    int rc = 0;
    u16 conn_id;

    /* Initialize offload request 1 structure */
    memset(&ofld_req1, 0x00, sizeof(struct fcoe_kwqe_conn_offload1));

    ofld_req1.hdr.op_code = FCOE_KWQE_OPCODE_OFFLOAD_CONN1;
    ofld_req1.hdr.flags =
        (FCOE_KWQE_LAYER_CODE << FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);


    conn_id = (u16)tgt->fcoe_conn_id;
    ofld_req1.fcoe_conn_id = conn_id;


    ofld_req1.sq_addr_lo = (u32) tgt->sq_dma;
    ofld_req1.sq_addr_hi = (u32)((u64) tgt->sq_dma >> 32);

    ofld_req1.rq_pbl_addr_lo = (u32) tgt->rq_pbl_dma;
    ofld_req1.rq_pbl_addr_hi = (u32)((u64) tgt->rq_pbl_dma >> 32);

    ofld_req1.rq_first_pbe_addr_lo = (u32) tgt->rq_dma;
    ofld_req1.rq_first_pbe_addr_hi =
                (u32)((u64) tgt->rq_dma >> 32);

    ofld_req1.rq_prod = 0x8000;

    /* Initialize offload request 2 structure */
    memset(&ofld_req2, 0x00, sizeof(struct fcoe_kwqe_conn_offload2));

    ofld_req2.hdr.op_code = FCOE_KWQE_OPCODE_OFFLOAD_CONN2;
    ofld_req2.hdr.flags =
        (FCOE_KWQE_LAYER_CODE << FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);

    ofld_req2.tx_max_fc_pay_len = rdata->maxframe_size;

    ofld_req2.cq_addr_lo = (u32) tgt->cq_dma;
    ofld_req2.cq_addr_hi = (u32)((u64)tgt->cq_dma >> 32);

    ofld_req2.xferq_addr_lo = (u32) tgt->xferq_dma;
    ofld_req2.xferq_addr_hi = (u32)((u64)tgt->xferq_dma >> 32);

    ofld_req2.conn_db_addr_lo = (u32)tgt->conn_db_dma;
    ofld_req2.conn_db_addr_hi = (u32)((u64)tgt->conn_db_dma >> 32);

    /* Initialize offload request 3 structure */
    memset(&ofld_req3, 0x00, sizeof(struct fcoe_kwqe_conn_offload3));

    ofld_req3.hdr.op_code = FCOE_KWQE_OPCODE_OFFLOAD_CONN3;
    ofld_req3.hdr.flags =
        (FCOE_KWQE_LAYER_CODE << FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);

    ofld_req3.vlan_tag = interface->vlan_id <<
                FCOE_KWQE_CONN_OFFLOAD3_VLAN_ID_SHIFT;
    ofld_req3.vlan_tag |= 3 << FCOE_KWQE_CONN_OFFLOAD3_PRIORITY_SHIFT;

    port_id = fc_host_port_id(lport->host);
    if (port_id == 0) {
        BNX2FC_HBA_DBG(lport, "ofld_req: port_id = 0, link down?\n");
        return -EINVAL;
    }

    /*
     * Store s_id of the initiator for further reference. This will
     * be used during disable/destroy during linkdown processing as
     * when the lport is reset, the port_id also is reset to 0
     */
    tgt->sid = port_id;
    ofld_req3.s_id[0] = (port_id & 0x000000FF);
    ofld_req3.s_id[1] = (port_id & 0x0000FF00) >> 8;
    ofld_req3.s_id[2] = (port_id & 0x00FF0000) >> 16;

    port_id = rport->port_id;
    ofld_req3.d_id[0] = (port_id & 0x000000FF);
    ofld_req3.d_id[1] = (port_id & 0x0000FF00) >> 8;
    ofld_req3.d_id[2] = (port_id & 0x00FF0000) >> 16;

    ofld_req3.tx_total_conc_seqs = rdata->max_seq;

    ofld_req3.tx_max_conc_seqs_c3 = rdata->max_seq;
    ofld_req3.rx_max_fc_pay_len  = lport->mfs;

    ofld_req3.rx_total_conc_seqs = BNX2FC_MAX_SEQS;
    ofld_req3.rx_max_conc_seqs_c3 = BNX2FC_MAX_SEQS;
    ofld_req3.rx_open_seqs_exch_c3 = 1;

    ofld_req3.confq_first_pbe_addr_lo = tgt->confq_dma;
    ofld_req3.confq_first_pbe_addr_hi = (u32)((u64) tgt->confq_dma >> 32);

    /* set mul_n_port_ids supported flag to 0, until it is supported */
    ofld_req3.flags = 0;
    /*
    ofld_req3.flags |= (((lport->send_sp_features & FC_SP_FT_MNA) ? 1:0) <<
                FCOE_KWQE_CONN_OFFLOAD3_B_MUL_N_PORT_IDS_SHIFT);
    */
    /* Info from PLOGI response */
    ofld_req3.flags |= (((rdata->sp_features & FC_SP_FT_EDTR) ? 1 : 0) <<
                 FCOE_KWQE_CONN_OFFLOAD3_B_E_D_TOV_RES_SHIFT);

    ofld_req3.flags |= (((rdata->sp_features & FC_SP_FT_SEQC) ? 1 : 0) <<
                 FCOE_KWQE_CONN_OFFLOAD3_B_CONT_INCR_SEQ_CNT_SHIFT);

    /*
     * Info from PRLI response, this info is used for sequence level error
     * recovery support
     */
    if (tgt->dev_type == TYPE_TAPE) {
        ofld_req3.flags |= 1 <<
                    FCOE_KWQE_CONN_OFFLOAD3_B_CONF_REQ_SHIFT;
        ofld_req3.flags |= (((rdata->flags & FC_RP_FLAGS_REC_SUPPORTED)
                    ? 1 : 0) <<
                    FCOE_KWQE_CONN_OFFLOAD3_B_REC_VALID_SHIFT);
    }

    /* vlan flag */
    ofld_req3.flags |= (interface->vlan_enabled <<
                FCOE_KWQE_CONN_OFFLOAD3_B_VLAN_FLAG_SHIFT);

    /* C2_VALID and ACK flags are not set as they are not suppported */


    /* Initialize offload request 4 structure */
    memset(&ofld_req4, 0x00, sizeof(struct fcoe_kwqe_conn_offload4));
    ofld_req4.hdr.op_code = FCOE_KWQE_OPCODE_OFFLOAD_CONN4;
    ofld_req4.hdr.flags =
        (FCOE_KWQE_LAYER_CODE << FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);

    ofld_req4.e_d_tov_timer_val = lport->e_d_tov / 20;


    ofld_req4.src_mac_addr_lo[0] =  port->data_src_addr[5];
                            /* local mac */
    ofld_req4.src_mac_addr_lo[1] =  port->data_src_addr[4];
    ofld_req4.src_mac_addr_mid[0] =  port->data_src_addr[3];
    ofld_req4.src_mac_addr_mid[1] =  port->data_src_addr[2];
    ofld_req4.src_mac_addr_hi[0] =  port->data_src_addr[1];
    ofld_req4.src_mac_addr_hi[1] =  port->data_src_addr[0];
    ofld_req4.dst_mac_addr_lo[0] =  ctlr->dest_addr[5];
                            /* fcf mac */
    ofld_req4.dst_mac_addr_lo[1] = ctlr->dest_addr[4];
    ofld_req4.dst_mac_addr_mid[0] = ctlr->dest_addr[3];
    ofld_req4.dst_mac_addr_mid[1] = ctlr->dest_addr[2];
    ofld_req4.dst_mac_addr_hi[0] = ctlr->dest_addr[1];
    ofld_req4.dst_mac_addr_hi[1] = ctlr->dest_addr[0];

    ofld_req4.lcq_addr_lo = (u32) tgt->lcq_dma;
    ofld_req4.lcq_addr_hi = (u32)((u64) tgt->lcq_dma >> 32);

    ofld_req4.confq_pbl_base_addr_lo = (u32) tgt->confq_pbl_dma;
    ofld_req4.confq_pbl_base_addr_hi =
                    (u32)((u64) tgt->confq_pbl_dma >> 32);

    kwqe_arr[0] = (struct kwqe *) &ofld_req1;
    kwqe_arr[1] = (struct kwqe *) &ofld_req2;
    kwqe_arr[2] = (struct kwqe *) &ofld_req3;
    kwqe_arr[3] = (struct kwqe *) &ofld_req4;

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

    return rc;
}

static int bnx2fc_send_session_enable_req(struct fcoe_port *port,
                    struct bnx2fc_rport *tgt)
{
    struct kwqe *kwqe_arr[2];
    struct bnx2fc_interface *interface = port->priv;
    struct fcoe_ctlr *ctlr = bnx2fc_to_ctlr(interface);
    struct bnx2fc_hba *hba = interface->hba;
    struct fcoe_kwqe_conn_enable_disable enbl_req;
    struct fc_lport *lport = port->lport;
    struct fc_rport *rport = tgt->rport;
    int num_kwqes = 1;
    int rc = 0;
    u32 port_id;

    memset(&enbl_req, 0x00,
           sizeof(struct fcoe_kwqe_conn_enable_disable));
    enbl_req.hdr.op_code = FCOE_KWQE_OPCODE_ENABLE_CONN;
    enbl_req.hdr.flags =
        (FCOE_KWQE_LAYER_CODE << FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);

    enbl_req.src_mac_addr_lo[0] =  port->data_src_addr[5];
                            /* local mac */
    enbl_req.src_mac_addr_lo[1] =  port->data_src_addr[4];
    enbl_req.src_mac_addr_mid[0] =  port->data_src_addr[3];
    enbl_req.src_mac_addr_mid[1] =  port->data_src_addr[2];
    enbl_req.src_mac_addr_hi[0] =  port->data_src_addr[1];
    enbl_req.src_mac_addr_hi[1] =  port->data_src_addr[0];
    memcpy(tgt->src_addr, port->data_src_addr, ETH_ALEN);

    enbl_req.dst_mac_addr_lo[0] =  ctlr->dest_addr[5];
    enbl_req.dst_mac_addr_lo[1] =  ctlr->dest_addr[4];
    enbl_req.dst_mac_addr_mid[0] = ctlr->dest_addr[3];
    enbl_req.dst_mac_addr_mid[1] = ctlr->dest_addr[2];
    enbl_req.dst_mac_addr_hi[0] = ctlr->dest_addr[1];
    enbl_req.dst_mac_addr_hi[1] = ctlr->dest_addr[0];

    port_id = fc_host_port_id(lport->host);
    if (port_id != tgt->sid) {
        printk(KERN_ERR PFX "WARN: enable_req port_id = 0x%x,"
                "sid = 0x%x\n", port_id, tgt->sid);
        port_id = tgt->sid;
    }
    enbl_req.s_id[0] = (port_id & 0x000000FF);
    enbl_req.s_id[1] = (port_id & 0x0000FF00) >> 8;
    enbl_req.s_id[2] = (port_id & 0x00FF0000) >> 16;

    port_id = rport->port_id;
    enbl_req.d_id[0] = (port_id & 0x000000FF);
    enbl_req.d_id[1] = (port_id & 0x0000FF00) >> 8;
    enbl_req.d_id[2] = (port_id & 0x00FF0000) >> 16;
    enbl_req.vlan_tag = interface->vlan_id <<
                FCOE_KWQE_CONN_ENABLE_DISABLE_VLAN_ID_SHIFT;
    enbl_req.vlan_tag |= 3 << FCOE_KWQE_CONN_ENABLE_DISABLE_PRIORITY_SHIFT;
    enbl_req.vlan_flag = interface->vlan_enabled;
    enbl_req.context_id = tgt->context_id;
    enbl_req.conn_id = tgt->fcoe_conn_id;

    kwqe_arr[0] = (struct kwqe *) &enbl_req;

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

int bnx2fc_send_session_disable_req(struct fcoe_port *port,
                    struct bnx2fc_rport *tgt)
{
    struct bnx2fc_interface *interface = port->priv;
    struct fcoe_ctlr *ctlr = bnx2fc_to_ctlr(interface);
    struct bnx2fc_hba *hba = interface->hba;
    struct fcoe_kwqe_conn_enable_disable disable_req;
    struct kwqe *kwqe_arr[2];
    struct fc_rport *rport = tgt->rport;
    int num_kwqes = 1;
    int rc = 0;
    u32 port_id;

    memset(&disable_req, 0x00,
           sizeof(struct fcoe_kwqe_conn_enable_disable));
    disable_req.hdr.op_code = FCOE_KWQE_OPCODE_DISABLE_CONN;
    disable_req.hdr.flags =
        (FCOE_KWQE_LAYER_CODE << FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);

    disable_req.src_mac_addr_lo[0] =  tgt->src_addr[5];
    disable_req.src_mac_addr_lo[1] =  tgt->src_addr[4];
    disable_req.src_mac_addr_mid[0] =  tgt->src_addr[3];
    disable_req.src_mac_addr_mid[1] =  tgt->src_addr[2];
    disable_req.src_mac_addr_hi[0] =  tgt->src_addr[1];
    disable_req.src_mac_addr_hi[1] =  tgt->src_addr[0];

    disable_req.dst_mac_addr_lo[0] =  ctlr->dest_addr[5];
    disable_req.dst_mac_addr_lo[1] =  ctlr->dest_addr[4];
    disable_req.dst_mac_addr_mid[0] = ctlr->dest_addr[3];
    disable_req.dst_mac_addr_mid[1] = ctlr->dest_addr[2];
    disable_req.dst_mac_addr_hi[0] = ctlr->dest_addr[1];
    disable_req.dst_mac_addr_hi[1] = ctlr->dest_addr[0];

    port_id = tgt->sid;
    disable_req.s_id[0] = (port_id & 0x000000FF);
    disable_req.s_id[1] = (port_id & 0x0000FF00) >> 8;
    disable_req.s_id[2] = (port_id & 0x00FF0000) >> 16;


    port_id = rport->port_id;
    disable_req.d_id[0] = (port_id & 0x000000FF);
    disable_req.d_id[1] = (port_id & 0x0000FF00) >> 8;
    disable_req.d_id[2] = (port_id & 0x00FF0000) >> 16;
    disable_req.context_id = tgt->context_id;
    disable_req.conn_id = tgt->fcoe_conn_id;
    disable_req.vlan_tag = interface->vlan_id <<
                FCOE_KWQE_CONN_ENABLE_DISABLE_VLAN_ID_SHIFT;
    disable_req.vlan_tag |=
            3 << FCOE_KWQE_CONN_ENABLE_DISABLE_PRIORITY_SHIFT;
    disable_req.vlan_flag = interface->vlan_enabled;

    kwqe_arr[0] = (struct kwqe *) &disable_req;

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

    return rc;
}

int bnx2fc_send_session_destroy_req(struct bnx2fc_hba *hba,
                    struct bnx2fc_rport *tgt)
{
    struct fcoe_kwqe_conn_destroy destroy_req;
    struct kwqe *kwqe_arr[2];
    int num_kwqes = 1;
    int rc = 0;

    memset(&destroy_req, 0x00, sizeof(struct fcoe_kwqe_conn_destroy));
    destroy_req.hdr.op_code = FCOE_KWQE_OPCODE_DESTROY_CONN;
    destroy_req.hdr.flags =
        (FCOE_KWQE_LAYER_CODE << FCOE_KWQE_HEADER_LAYER_CODE_SHIFT);

    destroy_req.context_id = tgt->context_id;
    destroy_req.conn_id = tgt->fcoe_conn_id;

    kwqe_arr[0] = (struct kwqe *) &destroy_req;

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

    return rc;
}

static bool is_valid_lport(struct bnx2fc_hba *hba, struct fc_lport *lport)
{
    struct bnx2fc_lport *blport;

    spin_lock_bh(&hba->hba_lock);
    list_for_each_entry(blport, &hba->vports, list) {
        if (blport->lport == lport) {
            spin_unlock_bh(&hba->hba_lock);
            return true;
        }
    }
    spin_unlock_bh(&hba->hba_lock);
    return false;

}


static void bnx2fc_unsol_els_work(struct work_struct *work)
{
    struct bnx2fc_unsol_els *unsol_els;
    struct fc_lport *lport;
    struct bnx2fc_hba *hba;
    struct fc_frame *fp;

    unsol_els = container_of(work, struct bnx2fc_unsol_els, unsol_els_work);
    lport = unsol_els->lport;
    fp = unsol_els->fp;
    hba = unsol_els->hba;
    if (is_valid_lport(hba, lport))
        fc_exch_recv(lport, fp);
    kfree(unsol_els);
}

void bnx2fc_process_l2_frame_compl(struct bnx2fc_rport *tgt,
                   unsigned char *buf,
                   u32 frame_len, u16 l2_oxid)
{
    struct fcoe_port *port = tgt->port;
    struct fc_lport *lport = port->lport;
    struct bnx2fc_interface *interface = port->priv;
    struct bnx2fc_unsol_els *unsol_els;
    struct fc_frame_header *fh;
    struct fc_frame *fp;
    struct sk_buff *skb;
    u32 payload_len;
    u32 crc;
    u8 op;


    unsol_els = kzalloc(sizeof(*unsol_els), GFP_ATOMIC);
    if (!unsol_els) {
        BNX2FC_TGT_DBG(tgt, "Unable to allocate unsol_work\n");
        return;
    }

    BNX2FC_TGT_DBG(tgt, "l2_frame_compl l2_oxid = 0x%x, frame_len = %d\n",
        l2_oxid, frame_len);

    payload_len = frame_len - sizeof(struct fc_frame_header);

    fp = fc_frame_alloc(lport, payload_len);
    if (!fp) {
        printk(KERN_ERR PFX "fc_frame_alloc failure\n");
        kfree(unsol_els);
        return;
    }

    fh = (struct fc_frame_header *) fc_frame_header_get(fp);
    /* Copy FC Frame header and payload into the frame */
    memcpy(fh, buf, frame_len);

    if (l2_oxid != FC_XID_UNKNOWN)
        fh->fh_ox_id = htons(l2_oxid);

    skb = fp_skb(fp);

    if ((fh->fh_r_ctl == FC_RCTL_ELS_REQ) ||
        (fh->fh_r_ctl == FC_RCTL_ELS_REP)) {

        if (fh->fh_type == FC_TYPE_ELS) {
            op = fc_frame_payload_op(fp);
            if ((op == ELS_TEST) || (op == ELS_ESTC) ||
                (op == ELS_FAN) || (op == ELS_CSU)) {
                /*
                 * No need to reply for these
                 * ELS requests
                 */
                printk(KERN_ERR PFX "dropping ELS 0x%x\n", op);
                kfree_skb(skb);
                kfree(unsol_els);
                return;
            }
        }
        crc = fcoe_fc_crc(fp);
        fc_frame_init(fp);
        fr_dev(fp) = lport;
        fr_sof(fp) = FC_SOF_I3;
        fr_eof(fp) = FC_EOF_T;
        fr_crc(fp) = cpu_to_le32(~crc);
        unsol_els->lport = lport;
        unsol_els->hba = interface->hba;
        unsol_els->fp = fp;
        INIT_WORK(&unsol_els->unsol_els_work, bnx2fc_unsol_els_work);
        queue_work(bnx2fc_wq, &unsol_els->unsol_els_work);
    } else {
        BNX2FC_HBA_DBG(lport, "fh_r_ctl = 0x%x\n", fh->fh_r_ctl);
        kfree_skb(skb);
        kfree(unsol_els);
    }
}

static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
{
    u8 num_rq;
    struct fcoe_err_report_entry *err_entry;
    unsigned char *rq_data;
    unsigned char *buf = NULL, *buf1;
    int i;
    u16 xid;
    u32 frame_len, len;
    struct bnx2fc_cmd *io_req = NULL;
    struct fcoe_task_ctx_entry *task, *task_page;
    struct bnx2fc_interface *interface = tgt->port->priv;
    struct bnx2fc_hba *hba = interface->hba;
    int task_idx, index;
    int rc = 0;
    u64 err_warn_bit_map;
    u8 err_warn = 0xff;


    BNX2FC_TGT_DBG(tgt, "Entered UNSOL COMPLETION wqe = 0x%x\n", wqe);
    switch (wqe & FCOE_UNSOLICITED_CQE_SUBTYPE) {
    case FCOE_UNSOLICITED_FRAME_CQE_TYPE:
        frame_len = (wqe & FCOE_UNSOLICITED_CQE_PKT_LEN) >>
                 FCOE_UNSOLICITED_CQE_PKT_LEN_SHIFT;

        num_rq = (frame_len + BNX2FC_RQ_BUF_SZ - 1) / BNX2FC_RQ_BUF_SZ;

        spin_lock_bh(&tgt->tgt_lock);
        rq_data = (unsigned char *)bnx2fc_get_next_rqe(tgt, num_rq);
        spin_unlock_bh(&tgt->tgt_lock);

        if (rq_data) {
            buf = rq_data;
        } else {
            buf1 = buf = kmalloc((num_rq * BNX2FC_RQ_BUF_SZ),
                          GFP_ATOMIC);

            if (!buf1) {
                BNX2FC_TGT_DBG(tgt, "Memory alloc failure\n");
                break;
            }

            for (i = 0; i < num_rq; i++) {
                spin_lock_bh(&tgt->tgt_lock);
                rq_data = (unsigned char *)
                       bnx2fc_get_next_rqe(tgt, 1);
                spin_unlock_bh(&tgt->tgt_lock);
                len = BNX2FC_RQ_BUF_SZ;
                memcpy(buf1, rq_data, len);
                buf1 += len;
            }
        }
        bnx2fc_process_l2_frame_compl(tgt, buf, frame_len,
                          FC_XID_UNKNOWN);

        if (buf != rq_data)
            kfree(buf);
        spin_lock_bh(&tgt->tgt_lock);
        bnx2fc_return_rqe(tgt, num_rq);
        spin_unlock_bh(&tgt->tgt_lock);
        break;

    case FCOE_ERROR_DETECTION_CQE_TYPE:
        /*
         * In case of error reporting CQE a single RQ entry
         * is consumed.
         */
        spin_lock_bh(&tgt->tgt_lock);
        num_rq = 1;
        err_entry = (struct fcoe_err_report_entry *)
                 bnx2fc_get_next_rqe(tgt, 1);
        xid = err_entry->fc_hdr.ox_id;
        BNX2FC_TGT_DBG(tgt, "Unsol Error Frame OX_ID = 0x%x\n", xid);
        BNX2FC_TGT_DBG(tgt, "err_warn_bitmap = %08x:%08x\n",
            err_entry->data.err_warn_bitmap_hi,
            err_entry->data.err_warn_bitmap_lo);
        BNX2FC_TGT_DBG(tgt, "buf_offsets - tx = 0x%x, rx = 0x%x\n",
            err_entry->data.tx_buf_off, err_entry->data.rx_buf_off);


        if (xid > BNX2FC_MAX_XID) {
            BNX2FC_TGT_DBG(tgt, "xid(0x%x) out of FW range\n",
                   xid);
            goto ret_err_rqe;
        }

        task_idx = xid / BNX2FC_TASKS_PER_PAGE;
        index = xid % BNX2FC_TASKS_PER_PAGE;
        task_page = (struct fcoe_task_ctx_entry *)
                    hba->task_ctx[task_idx];
        task = &(task_page[index]);

        io_req = (struct bnx2fc_cmd *)hba->cmd_mgr->cmds[xid];
        if (!io_req)
            goto ret_err_rqe;

        if (io_req->cmd_type != BNX2FC_SCSI_CMD) {
            printk(KERN_ERR PFX "err_warn: Not a SCSI cmd\n");
            goto ret_err_rqe;
        }

        if (test_and_clear_bit(BNX2FC_FLAG_IO_CLEANUP,
                       &io_req->req_flags)) {
            BNX2FC_IO_DBG(io_req, "unsol_err: cleanup in "
                        "progress.. ignore unsol err\n");
            goto ret_err_rqe;
        }

        err_warn_bit_map = (u64)
            ((u64)err_entry->data.err_warn_bitmap_hi << 32) |
            (u64)err_entry->data.err_warn_bitmap_lo;
        for (i = 0; i < BNX2FC_NUM_ERR_BITS; i++) {
            if (err_warn_bit_map & (u64)((u64)1 << i)) {
                err_warn = i;
                break;
            }
        }

        /*
         * If ABTS is already in progress, and FW error is
         * received after that, do not cancel the timeout_work
         * and let the error recovery continue by explicitly
         * logging out the target, when the ABTS eventually
         * times out.
         */
        if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
            printk(KERN_ERR PFX "err_warn: io_req (0x%x) already "
                        "in ABTS processing\n", xid);
            goto ret_err_rqe;
        }
        BNX2FC_TGT_DBG(tgt, "err = 0x%x\n", err_warn);
        if (tgt->dev_type != TYPE_TAPE)
            goto skip_rec;
        switch (err_warn) {
        case FCOE_ERROR_CODE_REC_TOV_TIMER_EXPIRATION:
        case FCOE_ERROR_CODE_DATA_OOO_RO:
        case FCOE_ERROR_CODE_COMMON_INCORRECT_SEQ_CNT:
        case FCOE_ERROR_CODE_DATA_SOFI3_SEQ_ACTIVE_SET:
        case FCOE_ERROR_CODE_FCP_RSP_OPENED_SEQ:
        case FCOE_ERROR_CODE_DATA_SOFN_SEQ_ACTIVE_RESET:
            BNX2FC_TGT_DBG(tgt, "REC TOV popped for xid - 0x%x\n",
                   xid);
            memset(&io_req->err_entry, 0,
                   sizeof(struct fcoe_err_report_entry));
            memcpy(&io_req->err_entry, err_entry,
                   sizeof(struct fcoe_err_report_entry));
            if (!test_bit(BNX2FC_FLAG_SRR_SENT,
                      &io_req->req_flags)) {
                spin_unlock_bh(&tgt->tgt_lock);
                rc = bnx2fc_send_rec(io_req);
                spin_lock_bh(&tgt->tgt_lock);

                if (rc)
                    goto skip_rec;
            } else
                printk(KERN_ERR PFX "SRR in progress\n");
            goto ret_err_rqe;
            break;
        default:
            break;
        }

skip_rec:
        set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags);
        /*
         * Cancel the timeout_work, as we received IO
         * completion with FW error.
         */
        if (cancel_delayed_work(&io_req->timeout_work))
            kref_put(&io_req->refcount, bnx2fc_cmd_release);

        rc = bnx2fc_initiate_abts(io_req);
        if (rc != SUCCESS) {
            printk(KERN_ERR PFX "err_warn: initiate_abts "
                "failed xid = 0x%x. issue cleanup\n",
                io_req->xid);
            bnx2fc_initiate_cleanup(io_req);
        }
ret_err_rqe:
        bnx2fc_return_rqe(tgt, 1);
        spin_unlock_bh(&tgt->tgt_lock);
        break;

    case FCOE_WARNING_DETECTION_CQE_TYPE:
        /*
         *In case of warning reporting CQE a single RQ entry
         * is consumes.
         */
        spin_lock_bh(&tgt->tgt_lock);
        num_rq = 1;
        err_entry = (struct fcoe_err_report_entry *)
                 bnx2fc_get_next_rqe(tgt, 1);
        xid = cpu_to_be16(err_entry->fc_hdr.ox_id);
        BNX2FC_TGT_DBG(tgt, "Unsol Warning Frame OX_ID = 0x%x\n", xid);
        BNX2FC_TGT_DBG(tgt, "err_warn_bitmap = %08x:%08x",
            err_entry->data.err_warn_bitmap_hi,
            err_entry->data.err_warn_bitmap_lo);
        BNX2FC_TGT_DBG(tgt, "buf_offsets - tx = 0x%x, rx = 0x%x",
            err_entry->data.tx_buf_off, err_entry->data.rx_buf_off);

        if (xid > BNX2FC_MAX_XID) {
            BNX2FC_TGT_DBG(tgt, "xid(0x%x) out of FW range\n", xid);
            goto ret_warn_rqe;
        }

        err_warn_bit_map = (u64)
            ((u64)err_entry->data.err_warn_bitmap_hi << 32) |
            (u64)err_entry->data.err_warn_bitmap_lo;
        for (i = 0; i < BNX2FC_NUM_ERR_BITS; i++) {
            if (err_warn_bit_map & (u64) (1 << i)) {
                err_warn = i;
                break;
            }
        }
        BNX2FC_TGT_DBG(tgt, "warn = 0x%x\n", err_warn);

        task_idx = xid / BNX2FC_TASKS_PER_PAGE;
        index = xid % BNX2FC_TASKS_PER_PAGE;
        task_page = (struct fcoe_task_ctx_entry *)
                 interface->hba->task_ctx[task_idx];
        task = &(task_page[index]);
        io_req = (struct bnx2fc_cmd *)hba->cmd_mgr->cmds[xid];
        if (!io_req)
            goto ret_warn_rqe;

        if (io_req->cmd_type != BNX2FC_SCSI_CMD) {
            printk(KERN_ERR PFX "err_warn: Not a SCSI cmd\n");
            goto ret_warn_rqe;
        }

        memset(&io_req->err_entry, 0,
               sizeof(struct fcoe_err_report_entry));
        memcpy(&io_req->err_entry, err_entry,
               sizeof(struct fcoe_err_report_entry));

        if (err_warn == FCOE_ERROR_CODE_REC_TOV_TIMER_EXPIRATION)
            /* REC_TOV is not a warning code */
            BUG_ON(1);
        else
            BNX2FC_TGT_DBG(tgt, "Unsolicited warning\n");
ret_warn_rqe:
        bnx2fc_return_rqe(tgt, 1);
        spin_unlock_bh(&tgt->tgt_lock);
        break;

    default:
        printk(KERN_ERR PFX "Unsol Compl: Invalid CQE Subtype\n");
        break;
    }
}

void bnx2fc_process_cq_compl(struct bnx2fc_rport *tgt, u16 wqe)
{
    struct fcoe_task_ctx_entry *task;
    struct fcoe_task_ctx_entry *task_page;
    struct fcoe_port *port = tgt->port;
    struct bnx2fc_interface *interface = port->priv;
    struct bnx2fc_hba *hba = interface->hba;
    struct bnx2fc_cmd *io_req;
    int task_idx, index;
    u16 xid;
    u8  cmd_type;
    u8 rx_state = 0;
    u8 num_rq;

    spin_lock_bh(&tgt->tgt_lock);
    xid = wqe & FCOE_PEND_WQ_CQE_TASK_ID;
    if (xid >= BNX2FC_MAX_TASKS) {
        printk(KERN_ERR PFX "ERROR:xid out of range\n");
        spin_unlock_bh(&tgt->tgt_lock);
        return;
    }
    task_idx = xid / BNX2FC_TASKS_PER_PAGE;
    index = xid % BNX2FC_TASKS_PER_PAGE;
    task_page = (struct fcoe_task_ctx_entry *)hba->task_ctx[task_idx];
    task = &(task_page[index]);

    num_rq = ((task->rxwr_txrd.var_ctx.rx_flags &
           FCOE_TCE_RX_WR_TX_RD_VAR_NUM_RQ_WQE) >>
           FCOE_TCE_RX_WR_TX_RD_VAR_NUM_RQ_WQE_SHIFT);

    io_req = (struct bnx2fc_cmd *)hba->cmd_mgr->cmds[xid];

    if (io_req == NULL) {
        printk(KERN_ERR PFX "ERROR? cq_compl - io_req is NULL\n");
        spin_unlock_bh(&tgt->tgt_lock);
        return;
    }

    /* Timestamp IO completion time */
    cmd_type = io_req->cmd_type;

    rx_state = ((task->rxwr_txrd.var_ctx.rx_flags &
            FCOE_TCE_RX_WR_TX_RD_VAR_RX_STATE) >>
            FCOE_TCE_RX_WR_TX_RD_VAR_RX_STATE_SHIFT);

    /* Process other IO completion types */
    switch (cmd_type) {
    case BNX2FC_SCSI_CMD:
        if (rx_state == FCOE_TASK_RX_STATE_COMPLETED) {
            bnx2fc_process_scsi_cmd_compl(io_req, task, num_rq);
            spin_unlock_bh(&tgt->tgt_lock);
            return;
        }

        if (rx_state == FCOE_TASK_RX_STATE_ABTS_COMPLETED)
            bnx2fc_process_abts_compl(io_req, task, num_rq);
        else if (rx_state ==
             FCOE_TASK_RX_STATE_EXCHANGE_CLEANUP_COMPLETED)
            bnx2fc_process_cleanup_compl(io_req, task, num_rq);
        else
            printk(KERN_ERR PFX "Invalid rx state - %d\n",
                rx_state);
        break;

    case BNX2FC_TASK_MGMT_CMD:
        BNX2FC_IO_DBG(io_req, "Processing TM complete\n");
        bnx2fc_process_tm_compl(io_req, task, num_rq);
        break;

    case BNX2FC_ABTS:
        /*
         * ABTS request received by firmware. ABTS response
         * will be delivered to the task belonging to the IO
         * that was aborted
         */
        BNX2FC_IO_DBG(io_req, "cq_compl- ABTS sent out by fw\n");
        kref_put(&io_req->refcount, bnx2fc_cmd_release);
        break;

    case BNX2FC_ELS:
        if (rx_state == FCOE_TASK_RX_STATE_COMPLETED)
            bnx2fc_process_els_compl(io_req, task, num_rq);
        else if (rx_state == FCOE_TASK_RX_STATE_ABTS_COMPLETED)
            bnx2fc_process_abts_compl(io_req, task, num_rq);
        else if (rx_state ==
             FCOE_TASK_RX_STATE_EXCHANGE_CLEANUP_COMPLETED)
            bnx2fc_process_cleanup_compl(io_req, task, num_rq);
        else
            printk(KERN_ERR PFX "Invalid rx state =  %d\n",
                rx_state);
        break;

    case BNX2FC_CLEANUP:
        BNX2FC_IO_DBG(io_req, "cq_compl- cleanup resp rcvd\n");
        kref_put(&io_req->refcount, bnx2fc_cmd_release);
        break;

    case BNX2FC_SEQ_CLEANUP:
        BNX2FC_IO_DBG(io_req, "cq_compl(0x%x) - seq cleanup resp\n",
                  io_req->xid);
        bnx2fc_process_seq_cleanup_compl(io_req, task, rx_state);
        kref_put(&io_req->refcount, bnx2fc_cmd_release);
        break;

    default:
        printk(KERN_ERR PFX "Invalid cmd_type %d\n", cmd_type);
        break;
    }
    spin_unlock_bh(&tgt->tgt_lock);
}

void bnx2fc_arm_cq(struct bnx2fc_rport *tgt)
{
    struct b577xx_fcoe_rx_doorbell *rx_db = &tgt->rx_db;
    u32 msg;

    wmb();
    rx_db->doorbell_cq_cons = tgt->cq_cons_idx | (tgt->cq_curr_toggle_bit <<
            FCOE_CQE_TOGGLE_BIT_SHIFT);
    msg = *((u32 *)rx_db);
    writel(cpu_to_le32(msg), tgt->ctx_base);
    mmiowb();

}

struct bnx2fc_work *bnx2fc_alloc_work(struct bnx2fc_rport *tgt, u16 wqe)
{
    struct bnx2fc_work *work;
    work = kzalloc(sizeof(struct bnx2fc_work), GFP_ATOMIC);
    if (!work)
        return NULL;

    INIT_LIST_HEAD(&work->list);
    work->tgt = tgt;
    work->wqe = wqe;
    return work;
}

int bnx2fc_process_new_cqes(struct bnx2fc_rport *tgt)
{
    struct fcoe_cqe *cq;
    u32 cq_cons;
    struct fcoe_cqe *cqe;
    u32 num_free_sqes = 0;
    u32 num_cqes = 0;
    u16 wqe;

    /*
     * cq_lock is a low contention lock used to protect
     * the CQ data structure from being freed up during
     * the upload operation
     */
    spin_lock_bh(&tgt->cq_lock);

    if (!tgt->cq) {
        printk(KERN_ERR PFX "process_new_cqes: cq is NULL\n");
        spin_unlock_bh(&tgt->cq_lock);
        return 0;
    }
    cq = tgt->cq;
    cq_cons = tgt->cq_cons_idx;
    cqe = &cq[cq_cons];

    while (((wqe = cqe->wqe) & FCOE_CQE_TOGGLE_BIT) ==
           (tgt->cq_curr_toggle_bit <<
           FCOE_CQE_TOGGLE_BIT_SHIFT)) {

        /* new entry on the cq */
        if (wqe & FCOE_CQE_CQE_TYPE) {
            /* Unsolicited event notification */
            bnx2fc_process_unsol_compl(tgt, wqe);
        } else {
            /* Pending work request completion */
            struct bnx2fc_work *work = NULL;
            struct bnx2fc_percpu_s *fps = NULL;
            unsigned int cpu = wqe % num_possible_cpus();

            fps = &per_cpu(bnx2fc_percpu, cpu);
            spin_lock_bh(&fps->fp_work_lock);
            if (unlikely(!fps->iothread))
                goto unlock;

            work = bnx2fc_alloc_work(tgt, wqe);
            if (work)
                list_add_tail(&work->list,
                          &fps->work_list);
unlock:
            spin_unlock_bh(&fps->fp_work_lock);

            /* Pending work request completion */
            if (fps->iothread && work)
                wake_up_process(fps->iothread);
            else
                bnx2fc_process_cq_compl(tgt, wqe);
            num_free_sqes++;
        }
        cqe++;
        tgt->cq_cons_idx++;
        num_cqes++;

        if (tgt->cq_cons_idx == BNX2FC_CQ_WQES_MAX) {
            tgt->cq_cons_idx = 0;
            cqe = cq;
            tgt->cq_curr_toggle_bit =
                1 - tgt->cq_curr_toggle_bit;
        }
    }
    if (num_cqes) {
        /* Arm CQ only if doorbell is mapped */
        if (tgt->ctx_base)
            bnx2fc_arm_cq(tgt);
        atomic_add(num_free_sqes, &tgt->free_sqes);
    }
    spin_unlock_bh(&tgt->cq_lock);
    return 0;
}

static void bnx2fc_fastpath_notification(struct bnx2fc_hba *hba,
                    struct fcoe_kcqe *new_cqe_kcqe)
{
    u32 conn_id = new_cqe_kcqe->fcoe_conn_id;
    struct bnx2fc_rport *tgt = hba->tgt_ofld_list[conn_id];

    if (!tgt) {
        printk(KERN_ERR PFX "conn_id 0x%x not valid\n", conn_id);
        return;
    }

    bnx2fc_process_new_cqes(tgt);
}

static void bnx2fc_process_ofld_cmpl(struct bnx2fc_hba *hba,
                    struct fcoe_kcqe *ofld_kcqe)
{
    struct bnx2fc_rport     *tgt;
    struct fcoe_port        *port;
    struct bnx2fc_interface     *interface;
    u32             conn_id;
    u32             context_id;
    int             rc;

    conn_id = ofld_kcqe->fcoe_conn_id;
    context_id = ofld_kcqe->fcoe_conn_context_id;
    tgt = hba->tgt_ofld_list[conn_id];
    if (!tgt) {
        printk(KERN_ALERT PFX "ERROR:ofld_cmpl: No pending ofld req\n");
        return;
    }
    BNX2FC_TGT_DBG(tgt, "Entered ofld compl - context_id = 0x%x\n",
        ofld_kcqe->fcoe_conn_context_id);
    port = tgt->port;
    interface = tgt->port->priv;
    if (hba != interface->hba) {
        printk(KERN_ERR PFX "ERROR:ofld_cmpl: HBA mis-match\n");
        goto ofld_cmpl_err;
    }
    /*
     * cnic has allocated a context_id for this session; use this
     * while enabling the session.
     */
    tgt->context_id = context_id;
    if (ofld_kcqe->completion_status) {
        if (ofld_kcqe->completion_status ==
                FCOE_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE) {
            printk(KERN_ERR PFX "unable to allocate FCoE context "
                "resources\n");
            set_bit(BNX2FC_FLAG_CTX_ALLOC_FAILURE, &tgt->flags);
        }
        goto ofld_cmpl_err;
    } else {

        /* now enable the session */
        rc = bnx2fc_send_session_enable_req(port, tgt);
        if (rc) {
            printk(KERN_ERR PFX "enable session failed\n");
            goto ofld_cmpl_err;
        }
    }
    return;
ofld_cmpl_err:
    set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
    wake_up_interruptible(&tgt->ofld_wait);
}

static void bnx2fc_process_enable_conn_cmpl(struct bnx2fc_hba *hba,
                        struct fcoe_kcqe *ofld_kcqe)
{
    struct bnx2fc_rport     *tgt;
    struct bnx2fc_interface     *interface;
    u32             conn_id;
    u32             context_id;

    context_id = ofld_kcqe->fcoe_conn_context_id;
    conn_id = ofld_kcqe->fcoe_conn_id;
    tgt = hba->tgt_ofld_list[conn_id];
    if (!tgt) {
        printk(KERN_ERR PFX "ERROR:enbl_cmpl: No pending ofld req\n");
        return;
    }

    BNX2FC_TGT_DBG(tgt, "Enable compl - context_id = 0x%x\n",
        ofld_kcqe->fcoe_conn_context_id);

    /*
     * context_id should be the same for this target during offload
     * and enable
     */
    if (tgt->context_id != context_id) {
        printk(KERN_ERR PFX "context id mis-match\n");
        return;
    }
    interface = tgt->port->priv;
    if (hba != interface->hba) {
        printk(KERN_ERR PFX "bnx2fc-enbl_cmpl: HBA mis-match\n");
        goto enbl_cmpl_err;
    }
    if (ofld_kcqe->completion_status)
        goto enbl_cmpl_err;
    else {
        /* enable successful - rport ready for issuing IOs */
        set_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
        set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
        wake_up_interruptible(&tgt->ofld_wait);
    }
    return;

enbl_cmpl_err:
    set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
    wake_up_interruptible(&tgt->ofld_wait);
}

static void bnx2fc_process_conn_disable_cmpl(struct bnx2fc_hba *hba,
                    struct fcoe_kcqe *disable_kcqe)
{

    struct bnx2fc_rport     *tgt;
    u32             conn_id;

    conn_id = disable_kcqe->fcoe_conn_id;
    tgt = hba->tgt_ofld_list[conn_id];
    if (!tgt) {
        printk(KERN_ERR PFX "ERROR: disable_cmpl: No disable req\n");
        return;
    }

    BNX2FC_TGT_DBG(tgt, PFX "disable_cmpl: conn_id %d\n", conn_id);

    if (disable_kcqe->completion_status) {
        printk(KERN_ERR PFX "Disable failed with cmpl status %d\n",
            disable_kcqe->completion_status);
        set_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags);
        set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
        wake_up_interruptible(&tgt->upld_wait);
    } else {
        /* disable successful */
        BNX2FC_TGT_DBG(tgt, "disable successful\n");
        clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
        set_bit(BNX2FC_FLAG_DISABLED, &tgt->flags);
        set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
        wake_up_interruptible(&tgt->upld_wait);
    }
}

static void bnx2fc_process_conn_destroy_cmpl(struct bnx2fc_hba *hba,
                    struct fcoe_kcqe *destroy_kcqe)
{
    struct bnx2fc_rport     *tgt;
    u32             conn_id;

    conn_id = destroy_kcqe->fcoe_conn_id;
    tgt = hba->tgt_ofld_list[conn_id];
    if (!tgt) {
        printk(KERN_ERR PFX "destroy_cmpl: No destroy req\n");
        return;
    }

    BNX2FC_TGT_DBG(tgt, "destroy_cmpl: conn_id %d\n", conn_id);

    if (destroy_kcqe->completion_status) {
        printk(KERN_ERR PFX "Destroy conn failed, cmpl status %d\n",
            destroy_kcqe->completion_status);
        return;
    } else {
        /* destroy successful */
        BNX2FC_TGT_DBG(tgt, "upload successful\n");
        clear_bit(BNX2FC_FLAG_DISABLED, &tgt->flags);
        set_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags);
        set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
        wake_up_interruptible(&tgt->upld_wait);
    }
}

static void bnx2fc_init_failure(struct bnx2fc_hba *hba, u32 err_code)
{
    switch (err_code) {
    case FCOE_KCQE_COMPLETION_STATUS_INVALID_OPCODE:
        printk(KERN_ERR PFX "init_failure due to invalid opcode\n");
        break;

    case FCOE_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE:
        printk(KERN_ERR PFX "init failed due to ctx alloc failure\n");
        break;

    case FCOE_KCQE_COMPLETION_STATUS_NIC_ERROR:
        printk(KERN_ERR PFX "init_failure due to NIC error\n");
        break;
    case FCOE_KCQE_COMPLETION_STATUS_ERROR:
        printk(KERN_ERR PFX "init failure due to compl status err\n");
        break;
    case FCOE_KCQE_COMPLETION_STATUS_WRONG_HSI_VERSION:
        printk(KERN_ERR PFX "init failure due to HSI mismatch\n");
        break;
    default:
        printk(KERN_ERR PFX "Unknown Error code %d\n", err_code);
    }
}

void bnx2fc_indicate_kcqe(void *context, struct kcqe *kcq[],
                    u32 num_cqe)
{
    struct bnx2fc_hba *hba = (struct bnx2fc_hba *)context;
    int i = 0;
    struct fcoe_kcqe *kcqe = NULL;

    while (i < num_cqe) {
        kcqe = (struct fcoe_kcqe *) kcq[i++];

        switch (kcqe->op_code) {
        case FCOE_KCQE_OPCODE_CQ_EVENT_NOTIFICATION:
            bnx2fc_fastpath_notification(hba, kcqe);
            break;

        case FCOE_KCQE_OPCODE_OFFLOAD_CONN:
            bnx2fc_process_ofld_cmpl(hba, kcqe);
            break;

        case FCOE_KCQE_OPCODE_ENABLE_CONN:
            bnx2fc_process_enable_conn_cmpl(hba, kcqe);
            break;

        case FCOE_KCQE_OPCODE_INIT_FUNC:
            if (kcqe->completion_status !=
                    FCOE_KCQE_COMPLETION_STATUS_SUCCESS) {
                bnx2fc_init_failure(hba,
                        kcqe->completion_status);
            } else {
                set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
                bnx2fc_get_link_state(hba);
                printk(KERN_INFO PFX "[%.2x]: FCOE_INIT passed\n",
                    (u8)hba->pcidev->bus->number);
            }
            break;

        case FCOE_KCQE_OPCODE_DESTROY_FUNC:
            if (kcqe->completion_status !=
                    FCOE_KCQE_COMPLETION_STATUS_SUCCESS) {

                printk(KERN_ERR PFX "DESTROY failed\n");
            } else {
                printk(KERN_ERR PFX "DESTROY success\n");
            }
            set_bit(BNX2FC_FLAG_DESTROY_CMPL, &hba->flags);
            wake_up_interruptible(&hba->destroy_wait);
            break;

        case FCOE_KCQE_OPCODE_DISABLE_CONN:
            bnx2fc_process_conn_disable_cmpl(hba, kcqe);
            break;

        case FCOE_KCQE_OPCODE_DESTROY_CONN:
            bnx2fc_process_conn_destroy_cmpl(hba, kcqe);
            break;

        case FCOE_KCQE_OPCODE_STAT_FUNC:
            if (kcqe->completion_status !=
                FCOE_KCQE_COMPLETION_STATUS_SUCCESS)
                printk(KERN_ERR PFX "STAT failed\n");
            complete(&hba->stat_req_done);
            break;

        case FCOE_KCQE_OPCODE_FCOE_ERROR:
            /* fall thru */
        default:
            printk(KERN_ERR PFX "unknown opcode 0x%x\n",
                                kcqe->op_code);
        }
    }
}

void bnx2fc_add_2_sq(struct bnx2fc_rport *tgt, u16 xid)
{
    struct fcoe_sqe *sqe;

    sqe = &tgt->sq[tgt->sq_prod_idx];

    /* Fill SQ WQE */
    sqe->wqe = xid << FCOE_SQE_TASK_ID_SHIFT;
    sqe->wqe |= tgt->sq_curr_toggle_bit << FCOE_SQE_TOGGLE_BIT_SHIFT;

    /* Advance SQ Prod Idx */
    if (++tgt->sq_prod_idx == BNX2FC_SQ_WQES_MAX) {
        tgt->sq_prod_idx = 0;
        tgt->sq_curr_toggle_bit = 1 - tgt->sq_curr_toggle_bit;
    }
}

void bnx2fc_ring_doorbell(struct bnx2fc_rport *tgt)
{
    struct b577xx_doorbell_set_prod *sq_db = &tgt->sq_db;
    u32 msg;

    wmb();
    sq_db->prod = tgt->sq_prod_idx |
                (tgt->sq_curr_toggle_bit << 15);
    msg = *((u32 *)sq_db);
    writel(cpu_to_le32(msg), tgt->ctx_base);
    mmiowb();

}

int bnx2fc_map_doorbell(struct bnx2fc_rport *tgt)
{
    u32 context_id = tgt->context_id;
    struct fcoe_port *port = tgt->port;
    u32 reg_off;
    resource_size_t reg_base;
    struct bnx2fc_interface *interface = port->priv;
    struct bnx2fc_hba *hba = interface->hba;

    reg_base = pci_resource_start(hba->pcidev,
                    BNX2X_DOORBELL_PCI_BAR);
    reg_off = BNX2FC_5771X_DB_PAGE_SIZE *
            (context_id & 0x1FFFF) + DPM_TRIGER_TYPE;
    tgt->ctx_base = ioremap_nocache(reg_base + reg_off, 4);
    if (!tgt->ctx_base)
        return -ENOMEM;
    return 0;
}

char *bnx2fc_get_next_rqe(struct bnx2fc_rport *tgt, u8 num_items)
{
    char *buf = (char *)tgt->rq + (tgt->rq_cons_idx * BNX2FC_RQ_BUF_SZ);

    if (tgt->rq_cons_idx + num_items > BNX2FC_RQ_WQES_MAX)
        return NULL;

    tgt->rq_cons_idx += num_items;

    if (tgt->rq_cons_idx >= BNX2FC_RQ_WQES_MAX)
        tgt->rq_cons_idx -= BNX2FC_RQ_WQES_MAX;

    return buf;
}

void bnx2fc_return_rqe(struct bnx2fc_rport *tgt, u8 num_items)
{
    /* return the rq buffer */
    u32 next_prod_idx = tgt->rq_prod_idx + num_items;
    if ((next_prod_idx & 0x7fff) == BNX2FC_RQ_WQES_MAX) {
        /* Wrap around RQ */
        next_prod_idx += 0x8000 - BNX2FC_RQ_WQES_MAX;
    }
    tgt->rq_prod_idx = next_prod_idx;
    tgt->conn_db->rq_prod = tgt->rq_prod_idx;
}

void bnx2fc_init_seq_cleanup_task(struct bnx2fc_cmd *seq_clnp_req,
                  struct fcoe_task_ctx_entry *task,
                  struct bnx2fc_cmd *orig_io_req,
                  u32 offset)
{
    struct scsi_cmnd *sc_cmd = orig_io_req->sc_cmd;
    struct bnx2fc_rport *tgt = seq_clnp_req->tgt;
    struct bnx2fc_interface *interface = tgt->port->priv;
    struct fcoe_bd_ctx *bd = orig_io_req->bd_tbl->bd_tbl;
    struct fcoe_task_ctx_entry *orig_task;
    struct fcoe_task_ctx_entry *task_page;
    struct fcoe_ext_mul_sges_ctx *sgl;
    u8 task_type = FCOE_TASK_TYPE_SEQUENCE_CLEANUP;
    u8 orig_task_type;
    u16 orig_xid = orig_io_req->xid;
    u32 context_id = tgt->context_id;
    u64 phys_addr = (u64)orig_io_req->bd_tbl->bd_tbl_dma;
    u32 orig_offset = offset;
    int bd_count;
    int orig_task_idx, index;
    int i;

    memset(task, 0, sizeof(struct fcoe_task_ctx_entry));

    if (sc_cmd->sc_data_direction == DMA_TO_DEVICE)
        orig_task_type = FCOE_TASK_TYPE_WRITE;
    else
        orig_task_type = FCOE_TASK_TYPE_READ;

    /* Tx flags */
    task->txwr_rxrd.const_ctx.tx_flags =
                FCOE_TASK_TX_STATE_SEQUENCE_CLEANUP <<
                FCOE_TCE_TX_WR_RX_RD_CONST_TX_STATE_SHIFT;
    /* init flags */
    task->txwr_rxrd.const_ctx.init_flags = task_type <<
                FCOE_TCE_TX_WR_RX_RD_CONST_TASK_TYPE_SHIFT;
    task->txwr_rxrd.const_ctx.init_flags |= FCOE_TASK_CLASS_TYPE_3 <<
                FCOE_TCE_TX_WR_RX_RD_CONST_CLASS_TYPE_SHIFT;
    task->rxwr_txrd.const_ctx.init_flags = context_id <<
                FCOE_TCE_RX_WR_TX_RD_CONST_CID_SHIFT;
    task->rxwr_txrd.const_ctx.init_flags = context_id <<
                FCOE_TCE_RX_WR_TX_RD_CONST_CID_SHIFT;

    task->txwr_rxrd.union_ctx.cleanup.ctx.cleaned_task_id = orig_xid;

    task->txwr_rxrd.union_ctx.cleanup.ctx.rolled_tx_seq_cnt = 0;
    task->txwr_rxrd.union_ctx.cleanup.ctx.rolled_tx_data_offset = offset;

    bd_count = orig_io_req->bd_tbl->bd_valid;

    /* obtain the appropriate bd entry from relative offset */
    for (i = 0; i < bd_count; i++) {
        if (offset < bd[i].buf_len)
            break;
        offset -= bd[i].buf_len;
    }
    phys_addr += (i * sizeof(struct fcoe_bd_ctx));

    if (orig_task_type == FCOE_TASK_TYPE_WRITE) {
        task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_addr.lo =
                (u32)phys_addr;
        task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_addr.hi =
                (u32)((u64)phys_addr >> 32);
        task->txwr_only.sgl_ctx.sgl.mul_sgl.sgl_size =
                bd_count;
        task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_off =
                offset; /* adjusted offset */
        task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_idx = i;
    } else {
        orig_task_idx = orig_xid / BNX2FC_TASKS_PER_PAGE;
        index = orig_xid % BNX2FC_TASKS_PER_PAGE;

        task_page = (struct fcoe_task_ctx_entry *)
                 interface->hba->task_ctx[orig_task_idx];
        orig_task = &(task_page[index]);

        /* Multiple SGEs were used for this IO */
        sgl = &task->rxwr_only.union_ctx.read_info.sgl_ctx.sgl;
        sgl->mul_sgl.cur_sge_addr.lo = (u32)phys_addr;
        sgl->mul_sgl.cur_sge_addr.hi = (u32)((u64)phys_addr >> 32);
        sgl->mul_sgl.sgl_size = bd_count;
        sgl->mul_sgl.cur_sge_off = offset; /*adjusted offset */
        sgl->mul_sgl.cur_sge_idx = i;

        memset(&task->rxwr_only.rx_seq_ctx, 0,
               sizeof(struct fcoe_rx_seq_ctx));
        task->rxwr_only.rx_seq_ctx.low_exp_ro = orig_offset;
        task->rxwr_only.rx_seq_ctx.high_exp_ro = orig_offset;
    }
}
void bnx2fc_init_cleanup_task(struct bnx2fc_cmd *io_req,
                  struct fcoe_task_ctx_entry *task,
                  u16 orig_xid)
{
    u8 task_type = FCOE_TASK_TYPE_EXCHANGE_CLEANUP;
    struct bnx2fc_rport *tgt = io_req->tgt;
    u32 context_id = tgt->context_id;

    memset(task, 0, sizeof(struct fcoe_task_ctx_entry));

    /* Tx Write Rx Read */
    /* init flags */
    task->txwr_rxrd.const_ctx.init_flags = task_type <<
                FCOE_TCE_TX_WR_RX_RD_CONST_TASK_TYPE_SHIFT;
    task->txwr_rxrd.const_ctx.init_flags |= FCOE_TASK_CLASS_TYPE_3 <<
                FCOE_TCE_TX_WR_RX_RD_CONST_CLASS_TYPE_SHIFT;
    if (tgt->dev_type == TYPE_TAPE)
        task->txwr_rxrd.const_ctx.init_flags |=
                FCOE_TASK_DEV_TYPE_TAPE <<
                FCOE_TCE_TX_WR_RX_RD_CONST_DEV_TYPE_SHIFT;
    else
        task->txwr_rxrd.const_ctx.init_flags |=
                FCOE_TASK_DEV_TYPE_DISK <<
                FCOE_TCE_TX_WR_RX_RD_CONST_DEV_TYPE_SHIFT;
    task->txwr_rxrd.union_ctx.cleanup.ctx.cleaned_task_id = orig_xid;

    /* Tx flags */
    task->txwr_rxrd.const_ctx.tx_flags =
                FCOE_TASK_TX_STATE_EXCHANGE_CLEANUP <<
                FCOE_TCE_TX_WR_RX_RD_CONST_TX_STATE_SHIFT;

    /* Rx Read Tx Write */
    task->rxwr_txrd.const_ctx.init_flags = context_id <<
                FCOE_TCE_RX_WR_TX_RD_CONST_CID_SHIFT;
    task->rxwr_txrd.var_ctx.rx_flags |= 1 <<
                FCOE_TCE_RX_WR_TX_RD_VAR_EXP_FIRST_FRAME_SHIFT;
}

void bnx2fc_init_mp_task(struct bnx2fc_cmd *io_req,
                struct fcoe_task_ctx_entry *task)
{
    struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);
    struct bnx2fc_rport *tgt = io_req->tgt;
    struct fc_frame_header *fc_hdr;
    struct fcoe_ext_mul_sges_ctx *sgl;
    u8 task_type = 0;
    u64 *hdr;
    u64 temp_hdr[3];
    u32 context_id;


    /* Obtain task_type */
    if ((io_req->cmd_type == BNX2FC_TASK_MGMT_CMD) ||
        (io_req->cmd_type == BNX2FC_ELS)) {
        task_type = FCOE_TASK_TYPE_MIDPATH;
    } else if (io_req->cmd_type == BNX2FC_ABTS) {
        task_type = FCOE_TASK_TYPE_ABTS;
    }

    memset(task, 0, sizeof(struct fcoe_task_ctx_entry));

    /* Setup the task from io_req for easy reference */
    io_req->task = task;

    BNX2FC_IO_DBG(io_req, "Init MP task for cmd_type = %d task_type = %d\n",
        io_req->cmd_type, task_type);

    /* Tx only */
    if ((task_type == FCOE_TASK_TYPE_MIDPATH) ||
        (task_type == FCOE_TASK_TYPE_UNSOLICITED)) {
        task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_addr.lo =
                (u32)mp_req->mp_req_bd_dma;
        task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_addr.hi =
                (u32)((u64)mp_req->mp_req_bd_dma >> 32);
        task->txwr_only.sgl_ctx.sgl.mul_sgl.sgl_size = 1;
    }

    /* Tx Write Rx Read */
    /* init flags */
    task->txwr_rxrd.const_ctx.init_flags = task_type <<
                FCOE_TCE_TX_WR_RX_RD_CONST_TASK_TYPE_SHIFT;
    if (tgt->dev_type == TYPE_TAPE)
        task->txwr_rxrd.const_ctx.init_flags |=
                FCOE_TASK_DEV_TYPE_TAPE <<
                FCOE_TCE_TX_WR_RX_RD_CONST_DEV_TYPE_SHIFT;
    else
        task->txwr_rxrd.const_ctx.init_flags |=
                FCOE_TASK_DEV_TYPE_DISK <<
                FCOE_TCE_TX_WR_RX_RD_CONST_DEV_TYPE_SHIFT;
    task->txwr_rxrd.const_ctx.init_flags |= FCOE_TASK_CLASS_TYPE_3 <<
                FCOE_TCE_TX_WR_RX_RD_CONST_CLASS_TYPE_SHIFT;

    /* tx flags */
    task->txwr_rxrd.const_ctx.tx_flags = FCOE_TASK_TX_STATE_INIT <<
                FCOE_TCE_TX_WR_RX_RD_CONST_TX_STATE_SHIFT;

    /* Rx Write Tx Read */
    task->rxwr_txrd.const_ctx.data_2_trns = io_req->data_xfer_len;

    /* rx flags */
    task->rxwr_txrd.var_ctx.rx_flags |= 1 <<
                FCOE_TCE_RX_WR_TX_RD_VAR_EXP_FIRST_FRAME_SHIFT;

    context_id = tgt->context_id;
    task->rxwr_txrd.const_ctx.init_flags = context_id <<
                FCOE_TCE_RX_WR_TX_RD_CONST_CID_SHIFT;

    fc_hdr = &(mp_req->req_fc_hdr);
    if (task_type == FCOE_TASK_TYPE_MIDPATH) {
        fc_hdr->fh_ox_id = cpu_to_be16(io_req->xid);
        fc_hdr->fh_rx_id = htons(0xffff);
        task->rxwr_txrd.var_ctx.rx_id = 0xffff;
    } else if (task_type == FCOE_TASK_TYPE_UNSOLICITED) {
        fc_hdr->fh_rx_id = cpu_to_be16(io_req->xid);
    }

    /* Fill FC Header into middle path buffer */
    hdr = (u64 *) &task->txwr_rxrd.union_ctx.tx_frame.fc_hdr;
    memcpy(temp_hdr, fc_hdr, sizeof(temp_hdr));
    hdr[0] = cpu_to_be64(temp_hdr[0]);
    hdr[1] = cpu_to_be64(temp_hdr[1]);
    hdr[2] = cpu_to_be64(temp_hdr[2]);

    /* Rx Only */
    if (task_type == FCOE_TASK_TYPE_MIDPATH) {
        sgl = &task->rxwr_only.union_ctx.read_info.sgl_ctx.sgl;

        sgl->mul_sgl.cur_sge_addr.lo = (u32)mp_req->mp_resp_bd_dma;
        sgl->mul_sgl.cur_sge_addr.hi =
                (u32)((u64)mp_req->mp_resp_bd_dma >> 32);
        sgl->mul_sgl.sgl_size = 1;
    }
}

void bnx2fc_init_task(struct bnx2fc_cmd *io_req,
                 struct fcoe_task_ctx_entry *task)
{
    u8 task_type;
    struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
    struct io_bdt *bd_tbl = io_req->bd_tbl;
    struct bnx2fc_rport *tgt = io_req->tgt;
    struct fcoe_cached_sge_ctx *cached_sge;
    struct fcoe_ext_mul_sges_ctx *sgl;
    int dev_type = tgt->dev_type;
    u64 *fcp_cmnd;
    u64 tmp_fcp_cmnd[4];
    u32 context_id;
    int cnt, i;
    int bd_count;

    memset(task, 0, sizeof(struct fcoe_task_ctx_entry));

    /* Setup the task from io_req for easy reference */
    io_req->task = task;

    if (sc_cmd->sc_data_direction == DMA_TO_DEVICE)
        task_type = FCOE_TASK_TYPE_WRITE;
    else
        task_type = FCOE_TASK_TYPE_READ;

    /* Tx only */
    bd_count = bd_tbl->bd_valid;
    cached_sge = &task->rxwr_only.union_ctx.read_info.sgl_ctx.cached_sge;
    if (task_type == FCOE_TASK_TYPE_WRITE) {
        if ((dev_type == TYPE_DISK) && (bd_count == 1)) {
            struct fcoe_bd_ctx *fcoe_bd_tbl = bd_tbl->bd_tbl;

            task->txwr_only.sgl_ctx.cached_sge.cur_buf_addr.lo =
            cached_sge->cur_buf_addr.lo =
                    fcoe_bd_tbl->buf_addr_lo;
            task->txwr_only.sgl_ctx.cached_sge.cur_buf_addr.hi =
            cached_sge->cur_buf_addr.hi =
                    fcoe_bd_tbl->buf_addr_hi;
            task->txwr_only.sgl_ctx.cached_sge.cur_buf_rem =
            cached_sge->cur_buf_rem =
                    fcoe_bd_tbl->buf_len;

            task->txwr_rxrd.const_ctx.init_flags |= 1 <<
                FCOE_TCE_TX_WR_RX_RD_CONST_CACHED_SGE_SHIFT;
        } else {
            task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_addr.lo =
                    (u32)bd_tbl->bd_tbl_dma;
            task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_addr.hi =
                    (u32)((u64)bd_tbl->bd_tbl_dma >> 32);
            task->txwr_only.sgl_ctx.sgl.mul_sgl.sgl_size =
                    bd_tbl->bd_valid;
        }
    }

    /*Tx Write Rx Read */
    /* Init state to NORMAL */
    task->txwr_rxrd.const_ctx.init_flags |= task_type <<
                FCOE_TCE_TX_WR_RX_RD_CONST_TASK_TYPE_SHIFT;
    if (dev_type == TYPE_TAPE) {
        task->txwr_rxrd.const_ctx.init_flags |=
                FCOE_TASK_DEV_TYPE_TAPE <<
                FCOE_TCE_TX_WR_RX_RD_CONST_DEV_TYPE_SHIFT;
        io_req->rec_retry = 0;
        io_req->rec_retry = 0;
    } else
        task->txwr_rxrd.const_ctx.init_flags |=
                FCOE_TASK_DEV_TYPE_DISK <<
                FCOE_TCE_TX_WR_RX_RD_CONST_DEV_TYPE_SHIFT;
    task->txwr_rxrd.const_ctx.init_flags |= FCOE_TASK_CLASS_TYPE_3 <<
                FCOE_TCE_TX_WR_RX_RD_CONST_CLASS_TYPE_SHIFT;
    /* tx flags */
    task->txwr_rxrd.const_ctx.tx_flags = FCOE_TASK_TX_STATE_NORMAL <<
                FCOE_TCE_TX_WR_RX_RD_CONST_TX_STATE_SHIFT;

    /* Set initial seq counter */
    task->txwr_rxrd.union_ctx.tx_seq.ctx.seq_cnt = 1;

    /* Fill FCP_CMND IU */
    fcp_cmnd = (u64 *)
            task->txwr_rxrd.union_ctx.fcp_cmd.opaque;
    bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)&tmp_fcp_cmnd);

    /* swap fcp_cmnd */
    cnt = sizeof(struct fcp_cmnd) / sizeof(u64);

    for (i = 0; i < cnt; i++) {
        *fcp_cmnd = cpu_to_be64(tmp_fcp_cmnd[i]);
        fcp_cmnd++;
    }

    /* Rx Write Tx Read */
    task->rxwr_txrd.const_ctx.data_2_trns = io_req->data_xfer_len;

    context_id = tgt->context_id;
    task->rxwr_txrd.const_ctx.init_flags = context_id <<
                FCOE_TCE_RX_WR_TX_RD_CONST_CID_SHIFT;

    /* rx flags */
    /* Set state to "waiting for the first packet" */
    task->rxwr_txrd.var_ctx.rx_flags |= 1 <<
                FCOE_TCE_RX_WR_TX_RD_VAR_EXP_FIRST_FRAME_SHIFT;

    task->rxwr_txrd.var_ctx.rx_id = 0xffff;

    /* Rx Only */
    if (task_type != FCOE_TASK_TYPE_READ)
        return;

    sgl = &task->rxwr_only.union_ctx.read_info.sgl_ctx.sgl;
    bd_count = bd_tbl->bd_valid;

    if (dev_type == TYPE_DISK) {
        if (bd_count == 1) {

            struct fcoe_bd_ctx *fcoe_bd_tbl = bd_tbl->bd_tbl;

            cached_sge->cur_buf_addr.lo = fcoe_bd_tbl->buf_addr_lo;
            cached_sge->cur_buf_addr.hi = fcoe_bd_tbl->buf_addr_hi;
            cached_sge->cur_buf_rem = fcoe_bd_tbl->buf_len;
            task->txwr_rxrd.const_ctx.init_flags |= 1 <<
                FCOE_TCE_TX_WR_RX_RD_CONST_CACHED_SGE_SHIFT;
        } else if (bd_count == 2) {
            struct fcoe_bd_ctx *fcoe_bd_tbl = bd_tbl->bd_tbl;

            cached_sge->cur_buf_addr.lo = fcoe_bd_tbl->buf_addr_lo;
            cached_sge->cur_buf_addr.hi = fcoe_bd_tbl->buf_addr_hi;
            cached_sge->cur_buf_rem = fcoe_bd_tbl->buf_len;

            fcoe_bd_tbl++;
            cached_sge->second_buf_addr.lo =
                         fcoe_bd_tbl->buf_addr_lo;
            cached_sge->second_buf_addr.hi =
                        fcoe_bd_tbl->buf_addr_hi;
            cached_sge->second_buf_rem = fcoe_bd_tbl->buf_len;
            task->txwr_rxrd.const_ctx.init_flags |= 1 <<
                FCOE_TCE_TX_WR_RX_RD_CONST_CACHED_SGE_SHIFT;
        } else {

            sgl->mul_sgl.cur_sge_addr.lo = (u32)bd_tbl->bd_tbl_dma;
            sgl->mul_sgl.cur_sge_addr.hi =
                    (u32)((u64)bd_tbl->bd_tbl_dma >> 32);
            sgl->mul_sgl.sgl_size = bd_count;
        }
    } else {
        sgl->mul_sgl.cur_sge_addr.lo = (u32)bd_tbl->bd_tbl_dma;
        sgl->mul_sgl.cur_sge_addr.hi =
                (u32)((u64)bd_tbl->bd_tbl_dma >> 32);
        sgl->mul_sgl.sgl_size = bd_count;
    }
}

int bnx2fc_setup_task_ctx(struct bnx2fc_hba *hba)
{
    int rc = 0;
    struct regpair *task_ctx_bdt;
    dma_addr_t addr;
    int i;

    /*
     * Allocate task context bd table. A page size of bd table
     * can map 256 buffers. Each buffer contains 32 task context
     * entries. Hence the limit with one page is 8192 task context
     * entries.
     */
    hba->task_ctx_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
                          PAGE_SIZE,
                          &hba->task_ctx_bd_dma,
                          GFP_KERNEL);
    if (!hba->task_ctx_bd_tbl) {
        printk(KERN_ERR PFX "unable to allocate task context BDT\n");
        rc = -1;
        goto out;
    }
    memset(hba->task_ctx_bd_tbl, 0, PAGE_SIZE);

    /*
     * Allocate task_ctx which is an array of pointers pointing to
     * a page containing 32 task contexts
     */
    hba->task_ctx = kzalloc((BNX2FC_TASK_CTX_ARR_SZ * sizeof(void *)),
                 GFP_KERNEL);
    if (!hba->task_ctx) {
        printk(KERN_ERR PFX "unable to allocate task context array\n");
        rc = -1;
        goto out1;
    }

    /*
     * Allocate task_ctx_dma which is an array of dma addresses
     */
    hba->task_ctx_dma = kmalloc((BNX2FC_TASK_CTX_ARR_SZ *
                    sizeof(dma_addr_t)), GFP_KERNEL);
    if (!hba->task_ctx_dma) {
        printk(KERN_ERR PFX "unable to alloc context mapping array\n");
        rc = -1;
        goto out2;
    }

    task_ctx_bdt = (struct regpair *)hba->task_ctx_bd_tbl;
    for (i = 0; i < BNX2FC_TASK_CTX_ARR_SZ; i++) {

        hba->task_ctx[i] = dma_alloc_coherent(&hba->pcidev->dev,
                              PAGE_SIZE,
                              &hba->task_ctx_dma[i],
                              GFP_KERNEL);
        if (!hba->task_ctx[i]) {
            printk(KERN_ERR PFX "unable to alloc task context\n");
            rc = -1;
            goto out3;
        }
        memset(hba->task_ctx[i], 0, PAGE_SIZE);
        addr = (u64)hba->task_ctx_dma[i];
        task_ctx_bdt->hi = cpu_to_le32((u64)addr >> 32);
        task_ctx_bdt->lo = cpu_to_le32((u32)addr);
        task_ctx_bdt++;
    }
    return 0;

out3:
    for (i = 0; i < BNX2FC_TASK_CTX_ARR_SZ; i++) {
        if (hba->task_ctx[i]) {

            dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
                hba->task_ctx[i], hba->task_ctx_dma[i]);
            hba->task_ctx[i] = NULL;
        }
    }

    kfree(hba->task_ctx_dma);
    hba->task_ctx_dma = NULL;
out2:
    kfree(hba->task_ctx);
    hba->task_ctx = NULL;
out1:
    dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
            hba->task_ctx_bd_tbl, hba->task_ctx_bd_dma);
    hba->task_ctx_bd_tbl = NULL;
out:
    return rc;
}

void bnx2fc_free_task_ctx(struct bnx2fc_hba *hba)
{
    int i;

    if (hba->task_ctx_bd_tbl) {
        dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
                    hba->task_ctx_bd_tbl,
                    hba->task_ctx_bd_dma);
        hba->task_ctx_bd_tbl = NULL;
    }

    if (hba->task_ctx) {
        for (i = 0; i < BNX2FC_TASK_CTX_ARR_SZ; i++) {
            if (hba->task_ctx[i]) {
                dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
                            hba->task_ctx[i],
                            hba->task_ctx_dma[i]);
                hba->task_ctx[i] = NULL;
            }
        }
        kfree(hba->task_ctx);
        hba->task_ctx = NULL;
    }

    kfree(hba->task_ctx_dma);
    hba->task_ctx_dma = NULL;
}

static void bnx2fc_free_hash_table(struct bnx2fc_hba *hba)
{
    int i;
    int segment_count;
    int hash_table_size;
    u32 *pbl;

    segment_count = hba->hash_tbl_segment_count;
    hash_table_size = BNX2FC_NUM_MAX_SESS * BNX2FC_MAX_ROWS_IN_HASH_TBL *
        sizeof(struct fcoe_hash_table_entry);

    pbl = hba->hash_tbl_pbl;
    for (i = 0; i < segment_count; ++i) {
        dma_addr_t dma_address;

        dma_address = le32_to_cpu(*pbl);
        ++pbl;
        dma_address += ((u64)le32_to_cpu(*pbl)) << 32;
        ++pbl;
        dma_free_coherent(&hba->pcidev->dev,
                  BNX2FC_HASH_TBL_CHUNK_SIZE,
                  hba->hash_tbl_segments[i],
                  dma_address);

    }

    if (hba->hash_tbl_pbl) {
        dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
                    hba->hash_tbl_pbl,
                    hba->hash_tbl_pbl_dma);
        hba->hash_tbl_pbl = NULL;
    }
}

static int bnx2fc_allocate_hash_table(struct bnx2fc_hba *hba)
{
    int i;
    int hash_table_size;
    int segment_count;
    int segment_array_size;
    int dma_segment_array_size;
    dma_addr_t *dma_segment_array;
    u32 *pbl;

    hash_table_size = BNX2FC_NUM_MAX_SESS * BNX2FC_MAX_ROWS_IN_HASH_TBL *
        sizeof(struct fcoe_hash_table_entry);

    segment_count = hash_table_size + BNX2FC_HASH_TBL_CHUNK_SIZE - 1;
    segment_count /= BNX2FC_HASH_TBL_CHUNK_SIZE;
    hba->hash_tbl_segment_count = segment_count;

    segment_array_size = segment_count * sizeof(*hba->hash_tbl_segments);
    hba->hash_tbl_segments = kzalloc(segment_array_size, GFP_KERNEL);
    if (!hba->hash_tbl_segments) {
        printk(KERN_ERR PFX "hash table pointers alloc failed\n");
        return -ENOMEM;
    }
    dma_segment_array_size = segment_count * sizeof(*dma_segment_array);
    dma_segment_array = kzalloc(dma_segment_array_size, GFP_KERNEL);
    if (!dma_segment_array) {
        printk(KERN_ERR PFX "hash table pointers (dma) alloc failed\n");
        return -ENOMEM;
    }

    for (i = 0; i < segment_count; ++i) {
        hba->hash_tbl_segments[i] =
            dma_alloc_coherent(&hba->pcidev->dev,
                       BNX2FC_HASH_TBL_CHUNK_SIZE,
                       &dma_segment_array[i],
                       GFP_KERNEL);
        if (!hba->hash_tbl_segments[i]) {
            printk(KERN_ERR PFX "hash segment alloc failed\n");
            while (--i >= 0) {
                dma_free_coherent(&hba->pcidev->dev,
                            BNX2FC_HASH_TBL_CHUNK_SIZE,
                            hba->hash_tbl_segments[i],
                            dma_segment_array[i]);
                hba->hash_tbl_segments[i] = NULL;
            }
            kfree(dma_segment_array);
            return -ENOMEM;
        }
        memset(hba->hash_tbl_segments[i], 0,
               BNX2FC_HASH_TBL_CHUNK_SIZE);
    }

    hba->hash_tbl_pbl = dma_alloc_coherent(&hba->pcidev->dev,
                           PAGE_SIZE,
                           &hba->hash_tbl_pbl_dma,
                           GFP_KERNEL);
    if (!hba->hash_tbl_pbl) {
        printk(KERN_ERR PFX "hash table pbl alloc failed\n");
        kfree(dma_segment_array);
        return -ENOMEM;
    }
    memset(hba->hash_tbl_pbl, 0, PAGE_SIZE);

    pbl = hba->hash_tbl_pbl;
    for (i = 0; i < segment_count; ++i) {
        u64 paddr = dma_segment_array[i];
        *pbl = cpu_to_le32((u32) paddr);
        ++pbl;
        *pbl = cpu_to_le32((u32) (paddr >> 32));
        ++pbl;
    }
    pbl = hba->hash_tbl_pbl;
    i = 0;
    while (*pbl && *(pbl + 1)) {
        u32 lo;
        u32 hi;
        lo = *pbl;
        ++pbl;
        hi = *pbl;
        ++pbl;
        ++i;
    }
    kfree(dma_segment_array);
    return 0;
}

int bnx2fc_setup_fw_resc(struct bnx2fc_hba *hba)
{
    u64 addr;
    u32 mem_size;
    int i;

    if (bnx2fc_allocate_hash_table(hba))
        return -ENOMEM;

    mem_size = BNX2FC_NUM_MAX_SESS * sizeof(struct regpair);
    hba->t2_hash_tbl_ptr = dma_alloc_coherent(&hba->pcidev->dev, mem_size,
                          &hba->t2_hash_tbl_ptr_dma,
                          GFP_KERNEL);
    if (!hba->t2_hash_tbl_ptr) {
        printk(KERN_ERR PFX "unable to allocate t2 hash table ptr\n");
        bnx2fc_free_fw_resc(hba);
        return -ENOMEM;
    }
    memset(hba->t2_hash_tbl_ptr, 0x00, mem_size);

    mem_size = BNX2FC_NUM_MAX_SESS *
                sizeof(struct fcoe_t2_hash_table_entry);
    hba->t2_hash_tbl = dma_alloc_coherent(&hba->pcidev->dev, mem_size,
                          &hba->t2_hash_tbl_dma,
                          GFP_KERNEL);
    if (!hba->t2_hash_tbl) {
        printk(KERN_ERR PFX "unable to allocate t2 hash table\n");
        bnx2fc_free_fw_resc(hba);
        return -ENOMEM;
    }
    memset(hba->t2_hash_tbl, 0x00, mem_size);
    for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
        addr = (unsigned long) hba->t2_hash_tbl_dma +
             ((i+1) * sizeof(struct fcoe_t2_hash_table_entry));
        hba->t2_hash_tbl[i].next.lo = addr & 0xffffffff;
        hba->t2_hash_tbl[i].next.hi = addr >> 32;
    }

    hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev,
                           PAGE_SIZE, &hba->dummy_buf_dma,
                           GFP_KERNEL);
    if (!hba->dummy_buffer) {
        printk(KERN_ERR PFX "unable to alloc MP Dummy Buffer\n");
        bnx2fc_free_fw_resc(hba);
        return -ENOMEM;
    }

    hba->stats_buffer = dma_alloc_coherent(&hba->pcidev->dev,
                           PAGE_SIZE,
                           &hba->stats_buf_dma,
                           GFP_KERNEL);
    if (!hba->stats_buffer) {
        printk(KERN_ERR PFX "unable to alloc Stats Buffer\n");
        bnx2fc_free_fw_resc(hba);
        return -ENOMEM;
    }
    memset(hba->stats_buffer, 0x00, PAGE_SIZE);

    return 0;
}

void bnx2fc_free_fw_resc(struct bnx2fc_hba *hba)
{
    u32 mem_size;

    if (hba->stats_buffer) {
        dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
                  hba->stats_buffer, hba->stats_buf_dma);
        hba->stats_buffer = NULL;
    }

    if (hba->dummy_buffer) {
        dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
                  hba->dummy_buffer, hba->dummy_buf_dma);
        hba->dummy_buffer = NULL;
    }

    if (hba->t2_hash_tbl_ptr) {
        mem_size = BNX2FC_NUM_MAX_SESS * sizeof(struct regpair);
        dma_free_coherent(&hba->pcidev->dev, mem_size,
                    hba->t2_hash_tbl_ptr,
                    hba->t2_hash_tbl_ptr_dma);
        hba->t2_hash_tbl_ptr = NULL;
    }

    if (hba->t2_hash_tbl) {
        mem_size = BNX2FC_NUM_MAX_SESS *
                sizeof(struct fcoe_t2_hash_table_entry);
        dma_free_coherent(&hba->pcidev->dev, mem_size,
                    hba->t2_hash_tbl, hba->t2_hash_tbl_dma);
        hba->t2_hash_tbl = NULL;
    }
    bnx2fc_free_hash_table(hba);
}