/* bnx2fc_hwi.c: QLogic Linux FCoE offload driver.
 * This file contains the code that low level functions that interact
 * with 57712 FCoE firmware.
 *
 * Copyright (c) 2008-2013 Broadcom Corporation
 * Copyright (c) 2014-2016 QLogic Corporation
 * Copyright (c) 2016-2017 Cavium Inc.
 *
 * 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 (bprakash@broadcom.com)
 */

#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;
}

/**
 * bnx2fc_send_fw_fcoe_init_msg - initiates initial handshake with FCoE f/w
 *
 * @hba:        adapter structure pointer
 *
 * Send down FCoE firmware init KWQEs which initiates the initial handshake
 *      with the f/w.
 *
 */
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 = hba->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;

        /*
         * enable both cached connection and cached tasks
         * 0 = none, 1 = cached connection, 2 = cached tasks, 3 = both
         */
        fcoe_init3.perf_config = 3;

        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;
}

/**
 * bnx2fc_send_session_ofld_req - initiates FCoE Session offload process
 *
 * @port:               port structure pointer
 * @tgt:                bnx2fc_rport structure pointer
 */
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 supported */


        /* 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;
}

/**
 * bnx2fc_send_session_enable_req - initiates FCoE Session enablement
 *
 * @port:               port structure pointer
 * @tgt:                bnx2fc_rport structure pointer
 */
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;
}

/**
 * bnx2fc_send_session_disable_req - initiates FCoE Session disable
 *
 * @port:               port structure pointer
 * @tgt:                bnx2fc_rport structure pointer
 */
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;
}

/**
 * bnx2fc_send_session_destroy_req - initiates FCoE Session destroy
 *
 * @port:               port structure pointer
 * @tgt:                bnx2fc_rport structure pointer
 */
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 > hba->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);
                        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 > hba->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;
                }

                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 >= hba->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();

}

static 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;
}

/* Pending work request completion */
static void bnx2fc_pending_work(struct bnx2fc_rport *tgt, unsigned int wqe)
{
        unsigned int cpu = wqe % num_possible_cpus();
        struct bnx2fc_percpu_s *fps;
        struct bnx2fc_work *work;

        fps = &per_cpu(bnx2fc_percpu, cpu);
        spin_lock_bh(&fps->fp_work_lock);
        if (fps->iothread) {
                work = bnx2fc_alloc_work(tgt, wqe);
                if (work) {
                        list_add_tail(&work->list, &fps->work_list);
                        wake_up_process(fps->iothread);
                        spin_unlock_bh(&fps->fp_work_lock);
                        return;
                }
        }
        spin_unlock_bh(&fps->fp_work_lock);
        bnx2fc_process_cq_compl(tgt, wqe);
}

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 {
                        bnx2fc_pending_work(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;
}

/**
 * bnx2fc_fastpath_notification - process global event queue (KCQ)
 *
 * @hba:                adapter structure pointer
 * @new_cqe_kcqe:       pointer to newly DMA'd KCQ entry
 *
 * Fast path event notification handler
 */
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);
}

/**
 * bnx2fc_process_ofld_cmpl - process FCoE session offload completion
 *
 * @hba:        adapter structure pointer
 * @ofld_kcqe:  connection offload kcqe pointer
 *
 * handle session offload completion, enable the session if offload is
 * successful.
 */
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;

        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);
                }
        } else {
                /* FW offload request successfully completed */
                set_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
        }
ofld_cmpl_err:
        set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
        wake_up_interruptible(&tgt->ofld_wait);
}

/**
 * bnx2fc_process_enable_conn_cmpl - process FCoE session enable completion
 *
 * @hba:        adapter structure pointer
 * @ofld_kcqe:  connection offload kcqe pointer
 *
 * handle session enable completion, mark the rport as ready
 */

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)
                /* enable successful - rport ready for issuing IOs */
                set_bit(BNX2FC_FLAG_ENABLED, &tgt->flags);

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);
                clear_bit(BNX2FC_FLAG_ENABLED, &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);
        }
}

/**
 * bnx2fc_indicae_kcqe - process KCQE
 *
 * @hba:        adapter structure pointer
 * @kcqe:       kcqe pointer
 * @num_cqe:    Number of completion queue elements
 *
 * Generic KCQ event handler
 */
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 = (1 << BNX2X_DB_SHIFT) * (context_id & 0x1FFFF);
        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;
        }
}

/**
 * bnx2fc_setup_task_ctx - allocate and map task context
 *
 * @hba:        pointer to adapter structure
 *
 * allocate memory for task context, and associated BD table to be used
 * by firmware
 *
 */
int bnx2fc_setup_task_ctx(struct bnx2fc_hba *hba)
{
        int rc = 0;
        struct regpair *task_ctx_bdt;
        dma_addr_t addr;
        int task_ctx_arr_sz;
        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
         */
        task_ctx_arr_sz = (hba->max_tasks / BNX2FC_TASKS_PER_PAGE);
        hba->task_ctx = kzalloc((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((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 < 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 < 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 task_ctx_arr_sz;
        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;
        }

        task_ctx_arr_sz = (hba->max_tasks / BNX2FC_TASKS_PER_PAGE);
        if (hba->task_ctx) {
                for (i = 0; i < 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;
        u32 *pbl;

        if (hba->hash_tbl_segments) {

                pbl = hba->hash_tbl_pbl;
                if (pbl) {
                        segment_count = hba->hash_tbl_segment_count;
                        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);
                        }
                }

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

        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");
                goto cleanup_ht;
        }

        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");
                        goto cleanup_dma;
                }
                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");
                goto cleanup_dma;
        }
        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;

cleanup_dma:
        for (i = 0; i < segment_count; ++i) {
                if (hba->hash_tbl_segments[i])
                        dma_free_coherent(&hba->pcidev->dev,
                                            BNX2FC_HASH_TBL_CHUNK_SIZE,
                                            hba->hash_tbl_segments[i],
                                            dma_segment_array[i]);
        }

        kfree(dma_segment_array);

cleanup_ht:
        kfree(hba->hash_tbl_segments);
        hba->hash_tbl_segments = NULL;
        return -ENOMEM;
}

/**
 * bnx2fc_setup_fw_resc - Allocate and map hash table and dummy buffer
 *
 * @hba:        Pointer to adapter structure
 *
 */
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);
}