xref: /openbmc/linux/drivers/scsi/bnx2fc/bnx2fc_hwi.c (revision 4f2c0a4acffbec01079c28f839422e64ddeff004)

/* 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
 *
 * @hba:		adapter 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 bnx2fc_interface *interface = tgt->port->priv;
	struct bnx2fc_hba *hba = interface->hba;
	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;
		}


		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;
		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);

		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,
			     unsigned char *rq_data, u8 num_rq,
			     struct fcoe_task_ctx_entry *task)
{
	struct fcoe_port *port = tgt->port;
	struct bnx2fc_interface *interface = port->priv;
	struct bnx2fc_hba *hba = interface->hba;
	struct bnx2fc_cmd *io_req;

	u16 xid;
	u8  cmd_type;
	u8 rx_state = 0;

	spin_lock_bh(&tgt->tgt_lock);

	xid = wqe & FCOE_PEND_WQ_CQE_TASK_ID;
	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,
						      rq_data);
			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, rq_data);
		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);

}

static struct bnx2fc_work *bnx2fc_alloc_work(struct bnx2fc_rport *tgt, u16 wqe,
					     unsigned char *rq_data, u8 num_rq,
					     struct fcoe_task_ctx_entry *task)
{
	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;
	work->num_rq = num_rq;
	work->task = task;
	if (rq_data)
		memcpy(work->rq_data, rq_data, BNX2FC_RQ_BUF_SZ);

	return work;
}

/* Pending work request completion */
static bool 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;
	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;
	unsigned char *rq_data = NULL;
	unsigned char rq_data_buff[BNX2FC_RQ_BUF_SZ];
	int task_idx, index;
	u16 xid;
	u8 num_rq;
	int i;

	xid = wqe & FCOE_PEND_WQ_CQE_TASK_ID;
	if (xid >= hba->max_tasks) {
		pr_err(PFX "ERROR:xid out of range\n");
		return false;
	}

	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);

	memset(rq_data_buff, 0, BNX2FC_RQ_BUF_SZ);

	if (!num_rq)
		goto num_rq_zero;

	rq_data = bnx2fc_get_next_rqe(tgt, 1);

	if (num_rq > 1) {
		/* We do not need extra sense data */
		for (i = 1; i < num_rq; i++)
			bnx2fc_get_next_rqe(tgt, 1);
	}

	if (rq_data)
		memcpy(rq_data_buff, rq_data, BNX2FC_RQ_BUF_SZ);

	/* return RQ entries */
	for (i = 0; i < num_rq; i++)
		bnx2fc_return_rqe(tgt, 1);

num_rq_zero:

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

	return true;
}

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 {
			if (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 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);
	interface = tgt->port->priv;
	if (hba != interface->hba) {
		printk(KERN_ERR PFX "ERROR:ofld_cmpl: HBA mismatch\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 mismatch\n");
		return;
	}
	interface = tgt->port->priv;
	if (hba != interface->hba) {
		printk(KERN_ERR PFX "bnx2fc-enbl_cmpl: HBA mismatch\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_indicate_kcqe() - process KCQE
 *
 * @context:	adapter structure pointer
 * @kcq:	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:
		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);

}

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(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 fcoe_bd_ctx *bd = orig_io_req->bd_tbl->bd_tbl;
	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 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 {

		/* 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;
	}

	/*
	 * 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;
		}
		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;
		}
	}

	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;
	}

	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)) {
		++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;
	}

	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;
	}
	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;
	}

	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);
}