scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.

The QLogic FastLinQ Driver for FCoE (qedf) is the FCoE specific module
for 41000 Series Converged Network Adapters by QLogic. This patch
consists of following changes:

- MAINTAINERS Makefile and Kconfig changes for qedf
- PCI driver registration
- libfc/fcoe host level initialization
- SCSI host template initialization and callbacks
- Debugfs and log level infrastructure
- Link handling
- Firmware interface structures
- QED core module initialization
- Light L2 interface callbacks
- I/O request initialization
- Firmware I/O completion handling
- Firmware ELS request/response handling
- FIP request/response handled by the driver itself
Signed-off-by: Nilesh Javali <nilesh.javali@cavium.com>
Signed-off-by: Manish Rangankar <manish.rangankar@cavium.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@cavium.com>
Signed-off-by: Arun Easi <arun.easi@cavium.com>
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

MAINTAINERS

@@ -10242,6 +10242,12 @@ L:	linux-scsi@vger.kernel.org
 S:	Supported
 F:	drivers/scsi/qedi/
 
+QLOGIC QL41xxx FCOE DRIVER
+M:	QLogic-Storage-Upstream@cavium.com
+L:	linux-scsi@vger.kernel.org
+S:	Supported
+F:	drivers/scsi/qedf/
+
 QNX4 FILESYSTEM
 M:	Anders Larsen <al@alarsen.net>
 W:	http://www.alarsen.net/linux/qnx4fs/

drivers/scsi/Kconfig

@@ -1235,6 +1235,7 @@ config SCSI_QLOGICPTI
 source "drivers/scsi/qla2xxx/Kconfig"
 source "drivers/scsi/qla4xxx/Kconfig"
 source "drivers/scsi/qedi/Kconfig"
+source "drivers/scsi/qedf/Kconfig"
 
 config SCSI_LPFC
 	tristate "Emulex LightPulse Fibre Channel Support"

drivers/scsi/Makefile

@@ -41,6 +41,7 @@ obj-$(CONFIG_FCOE)		+= fcoe/
 obj-$(CONFIG_FCOE_FNIC)		+= fnic/
 obj-$(CONFIG_SCSI_SNIC)		+= snic/
 obj-$(CONFIG_SCSI_BNX2X_FCOE)	+= libfc/ fcoe/ bnx2fc/
+obj-$(CONFIG_QEDF)		+= qedf/
 obj-$(CONFIG_ISCSI_TCP) 	+= libiscsi.o	libiscsi_tcp.o iscsi_tcp.o
 obj-$(CONFIG_INFINIBAND_ISER) 	+= libiscsi.o
 obj-$(CONFIG_ISCSI_BOOT_SYSFS)	+= iscsi_boot_sysfs.o

drivers/scsi/qedf/Kconfig

+config QEDF
+	tristate "QLogic QEDF 25/40/100Gb FCoE Initiator Driver Support"
+	depends on PCI && SCSI
+	depends on QED
+        depends on LIBFC
+        depends on LIBFCOE
+	select QED_LL2
+	select QED_FCOE
+	---help---
+	This driver supports FCoE offload for the QLogic FastLinQ
+	41000 Series Converged Network Adapters.

drivers/scsi/qedf/Makefile

+obj-$(CONFIG_QEDF) := qedf.o
+qedf-y = qedf_dbg.o qedf_main.o qedf_io.o qedf_fip.o \
+	 qedf_attr.o qedf_els.o
+
+qedf-$(CONFIG_DEBUG_FS) += qedf_debugfs.o

drivers/scsi/qedf/qedf.h

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#ifndef _QEDFC_H_
+#define _QEDFC_H_
+
+#include <scsi/libfcoe.h>
+#include <scsi/libfc.h>
+#include <scsi/fc/fc_fip.h>
+#include <scsi/fc/fc_fc2.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/fc_encode.h>
+#include <linux/version.h>
+
+
+/* qedf_hsi.h needs to before included any qed includes */
+#include "qedf_hsi.h"
+
+#include <linux/qed/qed_if.h>
+#include <linux/qed/qed_fcoe_if.h>
+#include <linux/qed/qed_ll2_if.h>
+#include "qedf_version.h"
+#include "qedf_dbg.h"
+
+/* Helpers to extract upper and lower 32-bits of pointer */
+#define U64_HI(val) ((u32)(((u64)(val)) >> 32))
+#define U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
+
+#define QEDF_DESCR "QLogic FCoE Offload Driver"
+#define QEDF_MODULE_NAME "qedf"
+
+#define QEDF_MIN_XID		0
+#define QEDF_MAX_SCSI_XID	(NUM_TASKS_PER_CONNECTION - 1)
+#define QEDF_MAX_ELS_XID	4095
+#define QEDF_FLOGI_RETRY_CNT	3
+#define QEDF_RPORT_RETRY_CNT	255
+#define QEDF_MAX_SESSIONS	1024
+#define QEDF_MAX_PAYLOAD	2048
+#define QEDF_MAX_BDS_PER_CMD	256
+#define QEDF_MAX_BD_LEN		0xffff
+#define QEDF_BD_SPLIT_SZ	0x1000
+#define QEDF_PAGE_SIZE		4096
+#define QED_HW_DMA_BOUNDARY     0xfff
+#define QEDF_MAX_SGLEN_FOR_CACHESGL		((1U << 16) - 1)
+#define QEDF_MFS		(QEDF_MAX_PAYLOAD + \
+	sizeof(struct fc_frame_header))
+#define QEDF_MAX_NPIV		64
+#define QEDF_TM_TIMEOUT		10
+#define QEDF_ABORT_TIMEOUT	10
+#define QEDF_CLEANUP_TIMEOUT	10
+#define QEDF_MAX_CDB_LEN	16
+
+#define UPSTREAM_REMOVE		1
+#define UPSTREAM_KEEP		1
+
+struct qedf_mp_req {
+	uint8_t tm_flags;
+
+	uint32_t req_len;
+	void *req_buf;
+	dma_addr_t req_buf_dma;
+	struct fcoe_sge *mp_req_bd;
+	dma_addr_t mp_req_bd_dma;
+	struct fc_frame_header req_fc_hdr;
+
+	uint32_t resp_len;
+	void *resp_buf;
+	dma_addr_t resp_buf_dma;
+	struct fcoe_sge *mp_resp_bd;
+	dma_addr_t mp_resp_bd_dma;
+	struct fc_frame_header resp_fc_hdr;
+};
+
+struct qedf_els_cb_arg {
+	struct qedf_ioreq *aborted_io_req;
+	struct qedf_ioreq *io_req;
+	u8 op; /* Used to keep track of ELS op */
+	uint16_t l2_oxid;
+	u32 offset; /* Used for sequence cleanup */
+	u8 r_ctl; /* Used for sequence cleanup */
+};
+
+enum qedf_ioreq_event {
+	QEDF_IOREQ_EV_ABORT_SUCCESS,
+	QEDF_IOREQ_EV_ABORT_FAILED,
+	QEDF_IOREQ_EV_SEND_RRQ,
+	QEDF_IOREQ_EV_ELS_TMO,
+	QEDF_IOREQ_EV_ELS_ERR_DETECT,
+	QEDF_IOREQ_EV_ELS_FLUSH,
+	QEDF_IOREQ_EV_CLEANUP_SUCCESS,
+	QEDF_IOREQ_EV_CLEANUP_FAILED,
+};
+
+#define FC_GOOD		0
+#define FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER	(0x1<<2)
+#define FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER	(0x1<<3)
+#define CMD_SCSI_STATUS(Cmnd)			((Cmnd)->SCp.Status)
+#define FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID	(0x1<<0)
+#define FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID	(0x1<<1)
+struct qedf_ioreq {
+	struct list_head link;
+	uint16_t xid;
+	struct scsi_cmnd *sc_cmd;
+	bool use_slowpath; /* Use slow SGL for this I/O */
+#define QEDF_SCSI_CMD		1
+#define QEDF_TASK_MGMT_CMD	2
+#define QEDF_ABTS		3
+#define QEDF_ELS		4
+#define QEDF_CLEANUP		5
+#define QEDF_SEQ_CLEANUP	6
+	u8 cmd_type;
+#define QEDF_CMD_OUTSTANDING		0x0
+#define QEDF_CMD_IN_ABORT		0x1
+#define QEDF_CMD_IN_CLEANUP		0x2
+#define QEDF_CMD_SRR_SENT		0x3
+	u8 io_req_flags;
+	struct qedf_rport *fcport;
+	unsigned long flags;
+	enum qedf_ioreq_event event;
+	size_t data_xfer_len;
+	struct kref refcount;
+	struct qedf_cmd_mgr *cmd_mgr;
+	struct io_bdt *bd_tbl;
+	struct delayed_work timeout_work;
+	struct completion tm_done;
+	struct completion abts_done;
+	struct fcoe_task_context *task;
+	int idx;
+/*
+ * Need to allocate enough room for both sense data and FCP response data
+ * which has a max length of 8 bytes according to spec.
+ */
+#define QEDF_SCSI_SENSE_BUFFERSIZE	(SCSI_SENSE_BUFFERSIZE + 8)
+	uint8_t *sense_buffer;
+	dma_addr_t sense_buffer_dma;
+	u32 fcp_resid;
+	u32 fcp_rsp_len;
+	u32 fcp_sns_len;
+	u8 cdb_status;
+	u8 fcp_status;
+	u8 fcp_rsp_code;
+	u8 scsi_comp_flags;
+#define QEDF_MAX_REUSE		0xfff
+	u16 reuse_count;
+	struct qedf_mp_req mp_req;
+	void (*cb_func)(struct qedf_els_cb_arg *cb_arg);
+	struct qedf_els_cb_arg *cb_arg;
+	int fp_idx;
+	unsigned int cpu;
+	unsigned int int_cpu;
+#define QEDF_IOREQ_SLOW_SGE		0
+#define QEDF_IOREQ_SINGLE_SGE		1
+#define QEDF_IOREQ_FAST_SGE		2
+	u8 sge_type;
+	struct delayed_work rrq_work;
+
+	/* Used for sequence level recovery; i.e. REC/SRR */
+	uint32_t rx_buf_off;
+	uint32_t tx_buf_off;
+	uint32_t rx_id;
+	uint32_t task_retry_identifier;
+
+	/*
+	 * Used to tell if we need to return a SCSI command
+	 * during some form of error processing.
+	 */
+	bool return_scsi_cmd_on_abts;
+};
+
+extern struct workqueue_struct *qedf_io_wq;
+
+struct qedf_rport {
+	spinlock_t rport_lock;
+#define QEDF_RPORT_SESSION_READY 1
+#define QEDF_RPORT_UPLOADING_CONNECTION	2
+	unsigned long flags;
+	unsigned long retry_delay_timestamp;
+	struct fc_rport *rport;
+	struct fc_rport_priv *rdata;
+	struct qedf_ctx *qedf;
+	u32 handle; /* Handle from qed */
+	u32 fw_cid; /* fw_cid from qed */
+	void __iomem *p_doorbell;
+	/* Send queue management */
+	atomic_t free_sqes;
+	atomic_t num_active_ios;
+	struct fcoe_wqe *sq;
+	dma_addr_t sq_dma;
+	u16 sq_prod_idx;
+	u16 fw_sq_prod_idx;
+	u16 sq_con_idx;
+	u32 sq_mem_size;
+	void *sq_pbl;
+	dma_addr_t sq_pbl_dma;
+	u32 sq_pbl_size;
+	u32 sid;
+#define	QEDF_RPORT_TYPE_DISK		1
+#define	QEDF_RPORT_TYPE_TAPE		2
+	uint dev_type; /* Disk or tape */
+	struct list_head peers;
+};
+
+/* Used to contain LL2 skb's in ll2_skb_list */
+struct qedf_skb_work {
+	struct work_struct work;
+	struct sk_buff *skb;
+	struct qedf_ctx *qedf;
+};
+
+struct qedf_fastpath {
+#define	QEDF_SB_ID_NULL		0xffff
+	u16		sb_id;
+	struct qed_sb_info	*sb_info;
+	struct qedf_ctx *qedf;
+	/* Keep track of number of completions on this fastpath */
+	unsigned long completions;
+	uint32_t cq_num_entries;
+};
+
+/* Used to pass fastpath information needed to process CQEs */
+struct qedf_io_work {
+	struct work_struct work;
+	struct fcoe_cqe cqe;
+	struct qedf_ctx *qedf;
+	struct fc_frame *fp;
+};
+
+struct qedf_glbl_q_params {
+	u64	hw_p_cq;	/* Completion queue PBL */
+	u64	hw_p_rq;	/* Request queue PBL */
+	u64	hw_p_cmdq;	/* Command queue PBL */
+};
+
+struct global_queue {
+	struct fcoe_cqe *cq;
+	dma_addr_t cq_dma;
+	u32 cq_mem_size;
+	u32 cq_cons_idx; /* Completion queue consumer index */
+	u32 cq_prod_idx;
+
+	void *cq_pbl;
+	dma_addr_t cq_pbl_dma;
+	u32 cq_pbl_size;
+};
+
+/* I/O tracing entry */
+#define QEDF_IO_TRACE_SIZE		2048
+struct qedf_io_log {
+#define QEDF_IO_TRACE_REQ		0
+#define QEDF_IO_TRACE_RSP		1
+	uint8_t direction;
+	uint16_t task_id;
+	uint32_t port_id; /* Remote port fabric ID */
+	int lun;
+	char op; /* SCSI CDB */
+	uint8_t lba[4];
+	unsigned int bufflen; /* SCSI buffer length */
+	unsigned int sg_count; /* Number of SG elements */
+	int result; /* Result passed back to mid-layer */
+	unsigned long jiffies; /* Time stamp when I/O logged */
+	int refcount; /* Reference count for task id */
+	unsigned int req_cpu; /* CPU that the task is queued on */
+	unsigned int int_cpu; /* Interrupt CPU that the task is received on */
+	unsigned int rsp_cpu; /* CPU that task is returned on */
+	u8 sge_type; /* Did we take the slow, single or fast SGE path */
+};
+
+/* Number of entries in BDQ */
+#define QEDF_BDQ_SIZE			256
+#define QEDF_BDQ_BUF_SIZE		2072
+
+/* DMA coherent buffers for BDQ */
+struct qedf_bdq_buf {
+	void *buf_addr;
+	dma_addr_t buf_dma;
+};
+
+/* Main adapter struct */
+struct qedf_ctx {
+	struct qedf_dbg_ctx dbg_ctx;
+	struct fcoe_ctlr ctlr;
+	struct fc_lport *lport;
+	u8 data_src_addr[ETH_ALEN];
+#define QEDF_LINK_DOWN		0
+#define QEDF_LINK_UP		1
+	atomic_t link_state;
+#define QEDF_DCBX_PENDING	0
+#define QEDF_DCBX_DONE		1
+	atomic_t dcbx;
+	uint16_t max_scsi_xid;
+	uint16_t max_els_xid;
+#define QEDF_NULL_VLAN_ID	-1
+#define QEDF_FALLBACK_VLAN	1002
+#define QEDF_DEFAULT_PRIO	3
+	int vlan_id;
+	uint vlan_hw_insert:1;
+	struct qed_dev *cdev;
+	struct qed_dev_fcoe_info dev_info;
+	struct qed_int_info int_info;
+	uint16_t last_command;
+	spinlock_t hba_lock;
+	struct pci_dev *pdev;
+	u64 wwnn;
+	u64 wwpn;
+	u8 __aligned(16) mac[ETH_ALEN];
+	struct list_head fcports;
+	atomic_t num_offloads;
+	unsigned int curr_conn_id;
+	struct workqueue_struct *ll2_recv_wq;
+	struct workqueue_struct *link_update_wq;
+	struct delayed_work link_update;
+	struct delayed_work link_recovery;
+	struct completion flogi_compl;
+	struct completion fipvlan_compl;
+
+	/*
+	 * Used to tell if we're in the window where we are waiting for
+	 * the link to come back up before informting fcoe that the link is
+	 * done.
+	 */
+	atomic_t link_down_tmo_valid;
+#define QEDF_TIMER_INTERVAL		(1 * HZ)
+	struct timer_list timer; /* One second book keeping timer */
+#define QEDF_DRAIN_ACTIVE		1
+#define QEDF_LL2_STARTED		2
+#define QEDF_UNLOADING			3
+#define QEDF_GRCDUMP_CAPTURE		4
+#define QEDF_IN_RECOVERY		5
+#define QEDF_DBG_STOP_IO		6
+	unsigned long flags; /* Miscellaneous state flags */
+	int fipvlan_retries;
+	u8 num_queues;
+	struct global_queue **global_queues;
+	/* Pointer to array of queue structures */
+	struct qedf_glbl_q_params *p_cpuq;
+	/* Physical address of array of queue structures */
+	dma_addr_t hw_p_cpuq;
+
+	struct qedf_bdq_buf bdq[QEDF_BDQ_SIZE];
+	void *bdq_pbl;
+	dma_addr_t bdq_pbl_dma;
+	size_t bdq_pbl_mem_size;
+	void *bdq_pbl_list;
+	dma_addr_t bdq_pbl_list_dma;
+	u8 bdq_pbl_list_num_entries;
+	void __iomem *bdq_primary_prod;
+	void __iomem *bdq_secondary_prod;
+	uint16_t bdq_prod_idx;
+
+	/* Structure for holding all the fastpath for this qedf_ctx */
+	struct qedf_fastpath *fp_array;
+	struct qed_fcoe_tid tasks;
+	struct qedf_cmd_mgr *cmd_mgr;
+	/* Holds the PF parameters we pass to qed to start he FCoE function */
+	struct qed_pf_params pf_params;
+	/* Used to time middle path ELS and TM commands */
+	struct workqueue_struct *timer_work_queue;
+
+#define QEDF_IO_WORK_MIN		64
+	mempool_t *io_mempool;
+	struct workqueue_struct *dpc_wq;
+
+	u32 slow_sge_ios;
+	u32 fast_sge_ios;
+	u32 single_sge_ios;
+
+	uint8_t	*grcdump;
+	uint32_t grcdump_size;
+
+	struct qedf_io_log io_trace_buf[QEDF_IO_TRACE_SIZE];
+	spinlock_t io_trace_lock;
+	uint16_t io_trace_idx;
+
+	bool stop_io_on_error;
+
+	u32 flogi_cnt;
+	u32 flogi_failed;
+
+	/* Used for fc statistics */
+	u64 input_requests;
+	u64 output_requests;
+	u64 control_requests;
+	u64 packet_aborts;
+	u64 alloc_failures;
+};
+
+struct io_bdt {
+	struct qedf_ioreq *io_req;
+	struct fcoe_sge *bd_tbl;
+	dma_addr_t bd_tbl_dma;
+	u16 bd_valid;
+};
+
+struct qedf_cmd_mgr {
+	struct qedf_ctx *qedf;
+	u16 idx;
+	struct io_bdt **io_bdt_pool;
+#define FCOE_PARAMS_NUM_TASKS		4096
+	struct qedf_ioreq cmds[FCOE_PARAMS_NUM_TASKS];
+	spinlock_t lock;
+	atomic_t free_list_cnt;
+};
+
+/* Stolen from qed_cxt_api.h and adapted for qed_fcoe_info
+ * Usage:
+ *
+ * void *ptr;
+ * ptr = qedf_get_task_mem(&qedf->tasks, 128);
+ */
+static inline void *qedf_get_task_mem(struct qed_fcoe_tid *info, u32 tid)
+{
+	return (void *)(info->blocks[tid / info->num_tids_per_block] +
+			(tid % info->num_tids_per_block) * info->size);
+}
+
+static inline void qedf_stop_all_io(struct qedf_ctx *qedf)
+{
+	set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
+}
+
+/*
+ * Externs
+ */
+#define QEDF_DEFAULT_LOG_MASK		0x3CFB6
+extern const struct qed_fcoe_ops *qed_ops;
+extern uint qedf_dump_frames;
+extern uint qedf_io_tracing;
+extern uint qedf_stop_io_on_error;
+extern uint qedf_link_down_tmo;
+#define QEDF_RETRY_DELAY_MAX		20 /* 2 seconds */
+extern bool qedf_retry_delay;
+extern uint qedf_debug;
+
+extern struct qedf_cmd_mgr *qedf_cmd_mgr_alloc(struct qedf_ctx *qedf);
+extern void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr);
+extern int qedf_queuecommand(struct Scsi_Host *host,
+	struct scsi_cmnd *sc_cmd);
+extern void qedf_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb);
+extern void qedf_update_src_mac(struct fc_lport *lport, u8 *addr);
+extern u8 *qedf_get_src_mac(struct fc_lport *lport);
+extern void qedf_fip_recv(struct qedf_ctx *qedf, struct sk_buff *skb);
+extern void qedf_fcoe_send_vlan_req(struct qedf_ctx *qedf);
+extern void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *io_req);
+extern void qedf_process_warning_compl(struct qedf_ctx *qedf,
+	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
+extern void qedf_process_error_detect(struct qedf_ctx *qedf,
+	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
+extern void qedf_flush_active_ios(struct qedf_rport *fcport, int lun);
+extern void qedf_release_cmd(struct kref *ref);
+extern int qedf_initiate_abts(struct qedf_ioreq *io_req,
+	bool return_scsi_cmd_on_abts);
+extern void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *io_req);
+extern struct qedf_ioreq *qedf_alloc_cmd(struct qedf_rport *fcport,
+	u8 cmd_type);
+
+extern struct device_attribute *qedf_host_attrs[];
+extern void qedf_cmd_timer_set(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
+	unsigned int timer_msec);
+extern int qedf_init_mp_req(struct qedf_ioreq *io_req);
+extern void qedf_init_mp_task(struct qedf_ioreq *io_req,
+	struct fcoe_task_context *task_ctx);
+extern void qedf_add_to_sq(struct qedf_rport *fcport, u16 xid,
+	u32 ptu_invalidate, enum fcoe_task_type req_type, u32 offset);
+extern void qedf_ring_doorbell(struct qedf_rport *fcport);
+extern void qedf_process_els_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *els_req);
+extern int qedf_send_rrq(struct qedf_ioreq *aborted_io_req);
+extern int qedf_send_adisc(struct qedf_rport *fcport, struct fc_frame *fp);
+extern int qedf_initiate_cleanup(struct qedf_ioreq *io_req,
+	bool return_scsi_cmd_on_abts);
+extern void qedf_process_cleanup_compl(struct qedf_ctx *qedf,
+	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
+extern int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags);
+extern void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *io_req);
+extern void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe);
+extern void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
+	int result);
+extern void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id);
+extern void qedf_create_sysfs_ctx_attr(struct qedf_ctx *qedf);
+extern void qedf_remove_sysfs_ctx_attr(struct qedf_ctx *qedf);
+extern void qedf_capture_grc_dump(struct qedf_ctx *qedf);
+extern void qedf_wait_for_upload(struct qedf_ctx *qedf);
+extern void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx,
+	struct fcoe_cqe *cqe);
+extern void qedf_restart_rport(struct qedf_rport *fcport);
+extern int qedf_send_rec(struct qedf_ioreq *orig_io_req);
+extern int qedf_post_io_req(struct qedf_rport *fcport,
+	struct qedf_ioreq *io_req);
+extern void qedf_process_seq_cleanup_compl(struct qedf_ctx *qedf,
+	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
+extern int qedf_send_flogi(struct qedf_ctx *qedf);
+extern void qedf_fp_io_handler(struct work_struct *work);
+
+#define FCOE_WORD_TO_BYTE  4
+#define QEDF_MAX_TASK_NUM	0xFFFF
+
+struct fip_vlan {
+	struct ethhdr eth;
+	struct fip_header fip;
+	struct {
+		struct fip_mac_desc mac;
+		struct fip_wwn_desc wwnn;
+	} desc;
+};
+
+/* SQ/CQ Sizes */
+#define GBL_RSVD_TASKS			16
+#define NUM_TASKS_PER_CONNECTION	1024
+#define NUM_RW_TASKS_PER_CONNECTION	512
+#define FCOE_PARAMS_CQ_NUM_ENTRIES	FCOE_PARAMS_NUM_TASKS
+
+#define FCOE_PARAMS_CMDQ_NUM_ENTRIES	FCOE_PARAMS_NUM_TASKS
+#define SQ_NUM_ENTRIES			NUM_TASKS_PER_CONNECTION
+
+#define QEDF_FCOE_PARAMS_GL_RQ_PI              0
+#define QEDF_FCOE_PARAMS_GL_CMD_PI             1
+
+#define QEDF_READ                     (1 << 1)
+#define QEDF_WRITE                    (1 << 0)
+#define MAX_FIBRE_LUNS			0xffffffff
+
+#define QEDF_MAX_NUM_CQS		8
+
+/*
+ * PCI function probe defines
+ */
+/* Probe/remove called during normal PCI probe */
+#define	QEDF_MODE_NORMAL		0
+/* Probe/remove called from qed error recovery */
+#define QEDF_MODE_RECOVERY		1
+
+#define SUPPORTED_25000baseKR_Full    (1<<27)
+#define SUPPORTED_50000baseKR2_Full   (1<<28)
+#define SUPPORTED_100000baseKR4_Full  (1<<29)
+#define SUPPORTED_100000baseCR4_Full  (1<<30)
+
+#endif

drivers/scsi/qedf/qedf_attr.c

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#include "qedf.h"
+
+static ssize_t
+qedf_fcoe_mac_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct fc_lport *lport = shost_priv(class_to_shost(dev));
+	u32 port_id;
+	u8 lport_src_id[3];
+	u8 fcoe_mac[6];
+
+	port_id = fc_host_port_id(lport->host);
+	lport_src_id[2] = (port_id & 0x000000FF);
+	lport_src_id[1] = (port_id & 0x0000FF00) >> 8;
+	lport_src_id[0] = (port_id & 0x00FF0000) >> 16;
+	fc_fcoe_set_mac(fcoe_mac, lport_src_id);
+
+	return scnprintf(buf, PAGE_SIZE, "%pM\n", fcoe_mac);
+}
+
+static DEVICE_ATTR(fcoe_mac, S_IRUGO, qedf_fcoe_mac_show, NULL);
+
+struct device_attribute *qedf_host_attrs[] = {
+	&dev_attr_fcoe_mac,
+	NULL,
+};
+
+extern const struct qed_fcoe_ops *qed_ops;
+
+inline bool qedf_is_vport(struct qedf_ctx *qedf)
+{
+	return (!(qedf->lport->vport == NULL));
+}
+
+/* Get base qedf for physical port from vport */
+static struct qedf_ctx *qedf_get_base_qedf(struct qedf_ctx *qedf)
+{
+	struct fc_lport *lport;
+	struct fc_lport *base_lport;
+
+	if (!(qedf_is_vport(qedf)))
+		return NULL;
+
+	lport = qedf->lport;
+	base_lport = shost_priv(vport_to_shost(lport->vport));
+	return (struct qedf_ctx *)(lport_priv(base_lport));
+}
+
+void qedf_capture_grc_dump(struct qedf_ctx *qedf)
+{
+	struct qedf_ctx *base_qedf;
+
+	/* Make sure we use the base qedf to take the GRC dump */
+	if (qedf_is_vport(qedf))
+		base_qedf = qedf_get_base_qedf(qedf);
+	else
+		base_qedf = qedf;
+
+	if (test_bit(QEDF_GRCDUMP_CAPTURE, &base_qedf->flags)) {
+		QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_INFO,
+		    "GRC Dump already captured.\n");
+		return;
+	}
+
+
+	qedf_get_grc_dump(base_qedf->cdev, qed_ops->common,
+	    &base_qedf->grcdump, &base_qedf->grcdump_size);
+	QEDF_ERR(&(base_qedf->dbg_ctx), "GRC Dump captured.\n");
+	set_bit(QEDF_GRCDUMP_CAPTURE, &base_qedf->flags);
+	qedf_uevent_emit(base_qedf->lport->host, QEDF_UEVENT_CODE_GRCDUMP,
+	    NULL);
+}
+
+static ssize_t
+qedf_sysfs_read_grcdump(struct file *filep, struct kobject *kobj,
+			struct bin_attribute *ba, char *buf, loff_t off,
+			size_t count)
+{
+	ssize_t ret = 0;
+	struct fc_lport *lport = shost_priv(dev_to_shost(container_of(kobj,
+							struct device, kobj)));
+	struct qedf_ctx *qedf = lport_priv(lport);
+
+	if (test_bit(QEDF_GRCDUMP_CAPTURE, &qedf->flags)) {
+		ret = memory_read_from_buffer(buf, count, &off,
+		    qedf->grcdump, qedf->grcdump_size);
+	} else {
+		QEDF_ERR(&(qedf->dbg_ctx), "GRC Dump not captured!\n");
+	}
+
+	return ret;
+}
+
+static ssize_t
+qedf_sysfs_write_grcdump(struct file *filep, struct kobject *kobj,
+			struct bin_attribute *ba, char *buf, loff_t off,
+			size_t count)
+{
+	struct fc_lport *lport = NULL;
+	struct qedf_ctx *qedf = NULL;
+	long reading;
+	int ret = 0;
+	char msg[40];
+
+	if (off != 0)
+		return ret;
+
+
+	lport = shost_priv(dev_to_shost(container_of(kobj,
+	    struct device, kobj)));
+	qedf = lport_priv(lport);
+
+	buf[1] = 0;
+	ret = kstrtol(buf, 10, &reading);
+	if (ret) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Invalid input, err(%d)\n", ret);
+		return ret;
+	}
+
+	memset(msg, 0, sizeof(msg));
+	switch (reading) {
+	case 0:
+		memset(qedf->grcdump, 0, qedf->grcdump_size);
+		clear_bit(QEDF_GRCDUMP_CAPTURE, &qedf->flags);
+		break;
+	case 1:
+		qedf_capture_grc_dump(qedf);
+		break;
+	}
+
+	return count;
+}
+
+static struct bin_attribute sysfs_grcdump_attr = {
+	.attr = {
+		.name = "grcdump",
+		.mode = S_IRUSR | S_IWUSR,
+	},
+	.size = 0,
+	.read = qedf_sysfs_read_grcdump,
+	.write = qedf_sysfs_write_grcdump,
+};
+
+static struct sysfs_bin_attrs bin_file_entries[] = {
+	{"grcdump", &sysfs_grcdump_attr},
+	{NULL},
+};
+
+void qedf_create_sysfs_ctx_attr(struct qedf_ctx *qedf)
+{
+	qedf_create_sysfs_attr(qedf->lport->host, bin_file_entries);
+}
+
+void qedf_remove_sysfs_ctx_attr(struct qedf_ctx *qedf)
+{
+	qedf_remove_sysfs_attr(qedf->lport->host, bin_file_entries);
+}

drivers/scsi/qedf/qedf_dbg.c

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#include "qedf_dbg.h"
+#include <linux/vmalloc.h>
+
+void
+qedf_dbg_err(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
+	      const char *fmt, ...)
+{
+	va_list va;
+	struct va_format vaf;
+	char nfunc[32];
+
+	memset(nfunc, 0, sizeof(nfunc));
+	memcpy(nfunc, func, sizeof(nfunc) - 1);
+
+	va_start(va, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	if (likely(qedf) && likely(qedf->pdev))
+		pr_err("[%s]:[%s:%d]:%d: %pV", dev_name(&(qedf->pdev->dev)),
+			nfunc, line, qedf->host_no, &vaf);
+	else
+		pr_err("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+	va_end(va);
+}
+
+void
+qedf_dbg_warn(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
+	       const char *fmt, ...)
+{
+	va_list va;
+	struct va_format vaf;
+	char nfunc[32];
+
+	memset(nfunc, 0, sizeof(nfunc));
+	memcpy(nfunc, func, sizeof(nfunc) - 1);
+
+	va_start(va, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	if (!(qedf_debug & QEDF_LOG_WARN))
+		goto ret;
+
+	if (likely(qedf) && likely(qedf->pdev))
+		pr_warn("[%s]:[%s:%d]:%d: %pV", dev_name(&(qedf->pdev->dev)),
+			nfunc, line, qedf->host_no, &vaf);
+	else
+		pr_warn("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+ret:
+	va_end(va);
+}
+
+void
+qedf_dbg_notice(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
+		 const char *fmt, ...)
+{
+	va_list va;
+	struct va_format vaf;
+	char nfunc[32];
+
+	memset(nfunc, 0, sizeof(nfunc));
+	memcpy(nfunc, func, sizeof(nfunc) - 1);
+
+	va_start(va, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	if (!(qedf_debug & QEDF_LOG_NOTICE))
+		goto ret;
+
+	if (likely(qedf) && likely(qedf->pdev))
+		pr_notice("[%s]:[%s:%d]:%d: %pV",
+			  dev_name(&(qedf->pdev->dev)), nfunc, line,
+			  qedf->host_no, &vaf);
+	else
+		pr_notice("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+ret:
+	va_end(va);
+}
+
+void
+qedf_dbg_info(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
+	       u32 level, const char *fmt, ...)
+{
+	va_list va;
+	struct va_format vaf;
+	char nfunc[32];
+
+	memset(nfunc, 0, sizeof(nfunc));
+	memcpy(nfunc, func, sizeof(nfunc) - 1);
+
+	va_start(va, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	if (!(qedf_debug & level))
+		goto ret;
+
+	if (likely(qedf) && likely(qedf->pdev))
+		pr_info("[%s]:[%s:%d]:%d: %pV", dev_name(&(qedf->pdev->dev)),
+			nfunc, line, qedf->host_no, &vaf);
+	else
+		pr_info("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+ret:
+	va_end(va);
+}
+
+int
+qedf_alloc_grc_dump_buf(u8 **buf, uint32_t len)
+{
+		*buf = vmalloc(len);
+		if (!(*buf))
+			return -ENOMEM;
+
+		memset(*buf, 0, len);
+		return 0;
+}
+
+void
+qedf_free_grc_dump_buf(uint8_t **buf)
+{
+		vfree(*buf);
+		*buf = NULL;
+}
+
+int
+qedf_get_grc_dump(struct qed_dev *cdev, const struct qed_common_ops *common,
+		   u8 **buf, uint32_t *grcsize)
+{
+	if (!*buf)
+		return -EINVAL;
+
+	return common->dbg_grc(cdev, *buf, grcsize);
+}
+
+void
+qedf_uevent_emit(struct Scsi_Host *shost, u32 code, char *msg)
+{
+	char event_string[40];
+	char *envp[] = {event_string, NULL};
+
+	memset(event_string, 0, sizeof(event_string));
+	switch (code) {
+	case QEDF_UEVENT_CODE_GRCDUMP:
+		if (msg)
+			strncpy(event_string, msg, strlen(msg));
+		else
+			sprintf(event_string, "GRCDUMP=%u", shost->host_no);
+		break;
+	default:
+		/* do nothing */
+		break;
+	}
+
+	kobject_uevent_env(&shost->shost_gendev.kobj, KOBJ_CHANGE, envp);
+}
+
+int
+qedf_create_sysfs_attr(struct Scsi_Host *shost, struct sysfs_bin_attrs *iter)
+{
+	int ret = 0;
+
+	for (; iter->name; iter++) {
+		ret = sysfs_create_bin_file(&shost->shost_gendev.kobj,
+					    iter->attr);
+		if (ret)
+			pr_err("Unable to create sysfs %s attr, err(%d).\n",
+			       iter->name, ret);
+	}
+	return ret;
+}
+
+void
+qedf_remove_sysfs_attr(struct Scsi_Host *shost, struct sysfs_bin_attrs *iter)
+{
+	for (; iter->name; iter++)
+		sysfs_remove_bin_file(&shost->shost_gendev.kobj, iter->attr);
+}

drivers/scsi/qedf/qedf_dbg.h

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#ifndef _QEDF_DBG_H_
+#define _QEDF_DBG_H_
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/compiler.h>
+#include <linux/string.h>
+#include <linux/version.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <scsi/scsi_transport.h>
+#include <linux/fs.h>
+
+#include <linux/qed/common_hsi.h>
+#include <linux/qed/qed_if.h>
+
+extern uint qedf_debug;
+
+/* Debug print level definitions */
+#define QEDF_LOG_DEFAULT	0x1		/* Set default logging mask */
+#define QEDF_LOG_INFO		0x2		/*
+						 * Informational logs,
+						 * MAC address, WWPN, WWNN
+						 */
+#define QEDF_LOG_DISC		0x4		/* Init, discovery, rport */
+#define QEDF_LOG_LL2		0x8		/* LL2, VLAN logs */
+#define QEDF_LOG_CONN		0x10		/* Connection setup, cleanup */
+#define QEDF_LOG_EVT		0x20		/* Events, link, mtu */
+#define QEDF_LOG_TIMER		0x40		/* Timer events */
+#define QEDF_LOG_MP_REQ	0x80		/* Middle Path (MP) logs */
+#define QEDF_LOG_SCSI_TM	0x100		/* SCSI Aborts, Task Mgmt */
+#define QEDF_LOG_UNSOL		0x200		/* unsolicited event logs */
+#define QEDF_LOG_IO		0x400		/* scsi cmd, completion */
+#define QEDF_LOG_MQ		0x800		/* Multi Queue logs */
+#define QEDF_LOG_BSG		0x1000		/* BSG logs */
+#define QEDF_LOG_DEBUGFS	0x2000		/* debugFS logs */
+#define QEDF_LOG_LPORT		0x4000		/* lport logs */
+#define QEDF_LOG_ELS		0x8000		/* ELS logs */
+#define QEDF_LOG_NPIV		0x10000		/* NPIV logs */
+#define QEDF_LOG_SESS		0x20000		/* Conection setup, cleanup */
+#define QEDF_LOG_TID		0x80000         /*
+						 * FW TID context acquire
+						 * free
+						 */
+#define QEDF_TRACK_TID		0x100000        /*
+						 * Track TID state. To be
+						 * enabled only at module load
+						 * and not run-time.
+						 */
+#define QEDF_TRACK_CMD_LIST    0x300000        /*
+						* Track active cmd list nodes,
+						* done with reference to TID,
+						* hence TRACK_TID also enabled.
+						*/
+#define QEDF_LOG_NOTICE	0x40000000	/* Notice logs */
+#define QEDF_LOG_WARN		0x80000000	/* Warning logs */
+
+/* Debug context structure */
+struct qedf_dbg_ctx {
+	unsigned int host_no;
+	struct pci_dev *pdev;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *bdf_dentry;
+#endif
+};
+
+#define QEDF_ERR(pdev, fmt, ...)	\
+		qedf_dbg_err(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
+#define QEDF_WARN(pdev, fmt, ...)	\
+		qedf_dbg_warn(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
+#define QEDF_NOTICE(pdev, fmt, ...)	\
+		qedf_dbg_notice(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
+#define QEDF_INFO(pdev, level, fmt, ...)	\
+		qedf_dbg_info(pdev, __func__, __LINE__, level, fmt,	\
+			      ## __VA_ARGS__)
+
+extern void qedf_dbg_err(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
+			  const char *fmt, ...);
+extern void qedf_dbg_warn(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
+			   const char *, ...);
+extern void qedf_dbg_notice(struct qedf_dbg_ctx *qedf, const char *func,
+			    u32 line, const char *, ...);
+extern void qedf_dbg_info(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
+			  u32 info, const char *fmt, ...);
+
+/* GRC Dump related defines */
+
+struct Scsi_Host;
+
+#define QEDF_UEVENT_CODE_GRCDUMP 0
+
+struct sysfs_bin_attrs {
+	char *name;
+	struct bin_attribute *attr;
+};
+
+extern int qedf_alloc_grc_dump_buf(uint8_t **buf, uint32_t len);
+extern void qedf_free_grc_dump_buf(uint8_t **buf);
+extern int qedf_get_grc_dump(struct qed_dev *cdev,
+			     const struct qed_common_ops *common, uint8_t **buf,
+			     uint32_t *grcsize);
+extern void qedf_uevent_emit(struct Scsi_Host *shost, u32 code, char *msg);
+extern int qedf_create_sysfs_attr(struct Scsi_Host *shost,
+				   struct sysfs_bin_attrs *iter);
+extern void qedf_remove_sysfs_attr(struct Scsi_Host *shost,
+				    struct sysfs_bin_attrs *iter);
+
+#ifdef CONFIG_DEBUG_FS
+/* DebugFS related code */
+struct qedf_list_of_funcs {
+	char *oper_str;
+	ssize_t (*oper_func)(struct qedf_dbg_ctx *qedf);
+};
+
+struct qedf_debugfs_ops {
+	char *name;
+	struct qedf_list_of_funcs *qedf_funcs;
+};
+
+#define qedf_dbg_fileops(drv, ops) \
+{ \
+	.owner  = THIS_MODULE, \
+	.open   = simple_open, \
+	.read   = drv##_dbg_##ops##_cmd_read, \
+	.write  = drv##_dbg_##ops##_cmd_write \
+}
+
+/* Used for debugfs sequential files */
+#define qedf_dbg_fileops_seq(drv, ops) \
+{ \
+	.owner = THIS_MODULE, \
+	.open = drv##_dbg_##ops##_open, \
+	.read = seq_read, \
+	.llseek = seq_lseek, \
+	.release = single_release, \
+}
+
+extern void qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,
+				struct qedf_debugfs_ops *dops,
+				struct file_operations *fops);
+extern void qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf);
+extern void qedf_dbg_init(char *drv_name);
+extern void qedf_dbg_exit(void);
+#endif /* CONFIG_DEBUG_FS */
+
+#endif /* _QEDF_DBG_H_ */

drivers/scsi/qedf/qedf_debugfs.c

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 QLogic Corporation
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#ifdef CONFIG_DEBUG_FS
+
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+#include <linux/module.h>
+
+#include "qedf.h"
+#include "qedf_dbg.h"
+
+static struct dentry *qedf_dbg_root;
+
+/**
+ * qedf_dbg_host_init - setup the debugfs file for the pf
+ * @pf: the pf that is starting up
+ **/
+void
+qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,
+		    struct qedf_debugfs_ops *dops,
+		    struct file_operations *fops)
+{
+	char host_dirname[32];
+	struct dentry *file_dentry = NULL;
+
+	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n");
+	/* create pf dir */
+	sprintf(host_dirname, "host%u", qedf->host_no);
+	qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root);
+	if (!qedf->bdf_dentry)
+		return;
+
+	/* create debugfs files */
+	while (dops) {
+		if (!(dops->name))
+			break;
+
+		file_dentry = debugfs_create_file(dops->name, 0600,
+						  qedf->bdf_dentry, qedf,
+						  fops);
+		if (!file_dentry) {
+			QEDF_INFO(qedf, QEDF_LOG_DEBUGFS,
+				   "Debugfs entry %s creation failed\n",
+				   dops->name);
+			debugfs_remove_recursive(qedf->bdf_dentry);
+			return;
+		}
+		dops++;
+		fops++;
+	}
+}
+
+/**
+ * qedf_dbg_host_exit - clear out the pf's debugfs entries
+ * @pf: the pf that is stopping
+ **/
+void
+qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf)
+{
+	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Destroying debugfs host "
+		   "entry\n");
+	/* remove debugfs  entries of this PF */
+	debugfs_remove_recursive(qedf->bdf_dentry);
+	qedf->bdf_dentry = NULL;
+}
+
+/**
+ * qedf_dbg_init - start up debugfs for the driver
+ **/
+void
+qedf_dbg_init(char *drv_name)
+{
+	QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n");
+
+	/* create qed dir in root of debugfs. NULL means debugfs root */
+	qedf_dbg_root = debugfs_create_dir(drv_name, NULL);
+	if (!qedf_dbg_root)
+		QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Init of debugfs "
+			   "failed\n");
+}
+
+/**
+ * qedf_dbg_exit - clean out the driver's debugfs entries
+ **/
+void
+qedf_dbg_exit(void)
+{
+	QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root "
+		   "entry\n");
+
+	/* remove qed dir in root of debugfs */
+	debugfs_remove_recursive(qedf_dbg_root);
+	qedf_dbg_root = NULL;
+}
+
+struct qedf_debugfs_ops qedf_debugfs_ops[] = {
+	{ "fp_int", NULL },
+	{ "io_trace", NULL },
+	{ "debug", NULL },
+	{ "stop_io_on_error", NULL},
+	{ "driver_stats", NULL},
+	{ "clear_stats", NULL},
+	{ "offload_stats", NULL},
+	/* This must be last */
+	{ NULL, NULL }
+};
+
+DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads);
+
+static ssize_t
+qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count,
+			 loff_t *ppos)
+{
+	size_t cnt = 0;
+	int id;
+	struct qedf_fastpath *fp = NULL;
+	struct qedf_dbg_ctx *qedf_dbg =
+				(struct qedf_dbg_ctx *)filp->private_data;
+	struct qedf_ctx *qedf = container_of(qedf_dbg,
+	    struct qedf_ctx, dbg_ctx);
+
+	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
+
+	cnt = sprintf(buffer, "\nFastpath I/O completions\n\n");
+
+	for (id = 0; id < qedf->num_queues; id++) {
+		fp = &(qedf->fp_array[id]);
+		if (fp->sb_id == QEDF_SB_ID_NULL)
+			continue;
+		cnt += sprintf((buffer + cnt), "#%d: %lu\n", id,
+			       fp->completions);
+	}
+
+	cnt = min_t(int, count, cnt - *ppos);
+	*ppos += cnt;
+	return cnt;
+}
+
+static ssize_t
+qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer,
+			  size_t count, loff_t *ppos)
+{
+	if (!count || *ppos)
+		return 0;
+
+	return count;
+}
+
+static ssize_t
+qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count,
+			loff_t *ppos)
+{
+	int cnt;
+	struct qedf_dbg_ctx *qedf =
+				(struct qedf_dbg_ctx *)filp->private_data;
+
+	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "entered\n");
+	cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug);
+
+	cnt = min_t(int, count, cnt - *ppos);
+	*ppos += cnt;
+	return cnt;
+}
+
+static ssize_t
+qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer,
+			 size_t count, loff_t *ppos)
+{
+	uint32_t val;
+	void *kern_buf;
+	int rval;
+	struct qedf_dbg_ctx *qedf =
+	    (struct qedf_dbg_ctx *)filp->private_data;
+
+	if (!count || *ppos)
+		return 0;
+
+	kern_buf = memdup_user(buffer, count);
+	if (IS_ERR(kern_buf))
+		return PTR_ERR(kern_buf);
+
+	rval = kstrtouint(kern_buf, 10, &val);
+	kfree(kern_buf);
+	if (rval)
+		return rval;
+
+	if (val == 1)
+		qedf_debug = QEDF_DEFAULT_LOG_MASK;
+	else
+		qedf_debug = val;
+
+	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val);
+	return count;
+}
+
+static ssize_t
+qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer,
+				   size_t count, loff_t *ppos)
+{
+	int cnt;
+	struct qedf_dbg_ctx *qedf_dbg =
+				(struct qedf_dbg_ctx *)filp->private_data;
+	struct qedf_ctx *qedf = container_of(qedf_dbg,
+	    struct qedf_ctx, dbg_ctx);
+
+	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
+	cnt = sprintf(buffer, "%s\n",
+	    qedf->stop_io_on_error ? "true" : "false");
+
+	cnt = min_t(int, count, cnt - *ppos);
+	*ppos += cnt;
+	return cnt;
+}
+
+static ssize_t
+qedf_dbg_stop_io_on_error_cmd_write(struct file *filp,
+				    const char __user *buffer, size_t count,
+				    loff_t *ppos)
+{
+	void *kern_buf;
+	struct qedf_dbg_ctx *qedf_dbg =
+				(struct qedf_dbg_ctx *)filp->private_data;
+	struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
+	    dbg_ctx);
+
+	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
+
+	if (!count || *ppos)
+		return 0;
+
+	kern_buf = memdup_user(buffer, 6);
+	if (IS_ERR(kern_buf))
+		return PTR_ERR(kern_buf);
+
+	if (strncmp(kern_buf, "false", 5) == 0)
+		qedf->stop_io_on_error = false;
+	else if (strncmp(kern_buf, "true", 4) == 0)
+		qedf->stop_io_on_error = true;
+	else if (strncmp(kern_buf, "now", 3) == 0)
+		/* Trigger from user to stop all I/O on this host */
+		set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
+
+	kfree(kern_buf);
+	return count;
+}
+
+static int
+qedf_io_trace_show(struct seq_file *s, void *unused)
+{
+	int i, idx = 0;
+	struct qedf_ctx *qedf = s->private;
+	struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx;
+	struct qedf_io_log *io_log;
+	unsigned long flags;
+
+	if (!qedf_io_tracing) {
+		seq_puts(s, "I/O tracing not enabled.\n");
+		goto out;
+	}
+
+	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
+
+	spin_lock_irqsave(&qedf->io_trace_lock, flags);
+	idx = qedf->io_trace_idx;
+	for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) {
+		io_log = &qedf->io_trace_buf[idx];
+		seq_printf(s, "%d:", io_log->direction);
+		seq_printf(s, "0x%x:", io_log->task_id);
+		seq_printf(s, "0x%06x:", io_log->port_id);
+		seq_printf(s, "%d:", io_log->lun);
+		seq_printf(s, "0x%02x:", io_log->op);
+		seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
+		    io_log->lba[1], io_log->lba[2], io_log->lba[3]);
+		seq_printf(s, "%d:", io_log->bufflen);
+		seq_printf(s, "%d:", io_log->sg_count);
+		seq_printf(s, "0x%08x:", io_log->result);
+		seq_printf(s, "%lu:", io_log->jiffies);
+		seq_printf(s, "%d:", io_log->refcount);
+		seq_printf(s, "%d:", io_log->req_cpu);
+		seq_printf(s, "%d:", io_log->int_cpu);
+		seq_printf(s, "%d:", io_log->rsp_cpu);
+		seq_printf(s, "%d\n", io_log->sge_type);
+
+		idx++;
+		if (idx == QEDF_IO_TRACE_SIZE)
+			idx = 0;
+	}
+	spin_unlock_irqrestore(&qedf->io_trace_lock, flags);
+
+out:
+	return 0;
+}
+
+static int
+qedf_dbg_io_trace_open(struct inode *inode, struct file *file)
+{
+	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
+	struct qedf_ctx *qedf = container_of(qedf_dbg,
+	    struct qedf_ctx, dbg_ctx);
+
+	return single_open(file, qedf_io_trace_show, qedf);
+}
+
+static int
+qedf_driver_stats_show(struct seq_file *s, void *unused)
+{
+	struct qedf_ctx *qedf = s->private;
+	struct qedf_rport *fcport;
+	struct fc_rport_priv *rdata;
+
+	seq_printf(s, "cmg_mgr free io_reqs: %d\n",
+	    atomic_read(&qedf->cmd_mgr->free_list_cnt));
+	seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios);
+	seq_printf(s, "single SGEs: %d\n", qedf->single_sge_ios);
+	seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios);
+
+	seq_puts(s, "Offloaded ports:\n\n");
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
+		rdata = fcport->rdata;
+		if (rdata == NULL)
+			continue;
+		seq_printf(s, "%06x: free_sqes: %d, num_active_ios: %d\n",
+		    rdata->ids.port_id, atomic_read(&fcport->free_sqes),
+		    atomic_read(&fcport->num_active_ios));
+	}
+	rcu_read_unlock();
+
+	return 0;
+}
+
+static int
+qedf_dbg_driver_stats_open(struct inode *inode, struct file *file)
+{
+	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
+	struct qedf_ctx *qedf = container_of(qedf_dbg,
+	    struct qedf_ctx, dbg_ctx);
+
+	return single_open(file, qedf_driver_stats_show, qedf);
+}
+
+static ssize_t
+qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer,
+				   size_t count, loff_t *ppos)
+{
+	int cnt = 0;
+
+	/* Essentially a read stub */
+	cnt = min_t(int, count, cnt - *ppos);
+	*ppos += cnt;
+	return cnt;
+}
+
+static ssize_t
+qedf_dbg_clear_stats_cmd_write(struct file *filp,
+				    const char __user *buffer, size_t count,
+				    loff_t *ppos)
+{
+	struct qedf_dbg_ctx *qedf_dbg =
+				(struct qedf_dbg_ctx *)filp->private_data;
+	struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
+	    dbg_ctx);
+
+	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n");
+
+	if (!count || *ppos)
+		return 0;
+
+	/* Clear stat counters exposed by 'stats' node */
+	qedf->slow_sge_ios = 0;
+	qedf->single_sge_ios = 0;
+	qedf->fast_sge_ios = 0;
+
+	return count;
+}
+
+static int
+qedf_offload_stats_show(struct seq_file *s, void *unused)
+{
+	struct qedf_ctx *qedf = s->private;
+	struct qed_fcoe_stats *fw_fcoe_stats;
+
+	fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
+	if (!fw_fcoe_stats) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
+		    "fw_fcoe_stats.\n");
+		goto out;
+	}
+
+	/* Query firmware for offload stats */
+	qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
+
+	seq_printf(s, "fcoe_rx_byte_cnt=%llu\n"
+	    "fcoe_rx_data_pkt_cnt=%llu\n"
+	    "fcoe_rx_xfer_pkt_cnt=%llu\n"
+	    "fcoe_rx_other_pkt_cnt=%llu\n"
+	    "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n"
+	    "fcoe_silent_drop_pkt_crc_error_cnt=%u\n"
+	    "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n"
+	    "fcoe_silent_drop_total_pkt_cnt=%u\n"
+	    "fcoe_silent_drop_pkt_rq_full_cnt=%u\n"
+	    "fcoe_tx_byte_cnt=%llu\n"
+	    "fcoe_tx_data_pkt_cnt=%llu\n"
+	    "fcoe_tx_xfer_pkt_cnt=%llu\n"
+	    "fcoe_tx_other_pkt_cnt=%llu\n",
+	    fw_fcoe_stats->fcoe_rx_byte_cnt,
+	    fw_fcoe_stats->fcoe_rx_data_pkt_cnt,
+	    fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt,
+	    fw_fcoe_stats->fcoe_rx_other_pkt_cnt,
+	    fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt,
+	    fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt,
+	    fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt,
+	    fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt,
+	    fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt,
+	    fw_fcoe_stats->fcoe_tx_byte_cnt,
+	    fw_fcoe_stats->fcoe_tx_data_pkt_cnt,
+	    fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt,
+	    fw_fcoe_stats->fcoe_tx_other_pkt_cnt);
+
+	kfree(fw_fcoe_stats);
+out:
+	return 0;
+}
+
+static int
+qedf_dbg_offload_stats_open(struct inode *inode, struct file *file)
+{
+	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
+	struct qedf_ctx *qedf = container_of(qedf_dbg,
+	    struct qedf_ctx, dbg_ctx);
+
+	return single_open(file, qedf_offload_stats_show, qedf);
+}
+
+
+const struct file_operations qedf_dbg_fops[] = {
+	qedf_dbg_fileops(qedf, fp_int),
+	qedf_dbg_fileops_seq(qedf, io_trace),
+	qedf_dbg_fileops(qedf, debug),
+	qedf_dbg_fileops(qedf, stop_io_on_error),
+	qedf_dbg_fileops_seq(qedf, driver_stats),
+	qedf_dbg_fileops(qedf, clear_stats),
+	qedf_dbg_fileops_seq(qedf, offload_stats),
+	/* This must be last */
+	{ NULL, NULL },
+};
+
+#else /* CONFIG_DEBUG_FS */
+void qedf_dbg_host_init(struct qedf_dbg_ctx *);
+void qedf_dbg_host_exit(struct qedf_dbg_ctx *);
+void qedf_dbg_init(char *);
+void qedf_dbg_exit(void);
+#endif /* CONFIG_DEBUG_FS */

drivers/scsi/qedf/qedf_els.c

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#include "qedf.h"
+
+/* It's assumed that the lock is held when calling this function. */
+static int qedf_initiate_els(struct qedf_rport *fcport, unsigned int op,
+	void *data, uint32_t data_len,
+	void (*cb_func)(struct qedf_els_cb_arg *cb_arg),
+	struct qedf_els_cb_arg *cb_arg, uint32_t timer_msec)
+{
+	struct qedf_ctx *qedf = fcport->qedf;
+	struct fc_lport *lport = qedf->lport;
+	struct qedf_ioreq *els_req;
+	struct qedf_mp_req *mp_req;
+	struct fc_frame_header *fc_hdr;
+	struct fcoe_task_context *task;
+	int rc = 0;
+	uint32_t did, sid;
+	uint16_t xid;
+	uint32_t start_time = jiffies / HZ;
+	uint32_t current_time;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending ELS\n");
+
+	rc = fc_remote_port_chkready(fcport->rport);
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: rport not ready\n", op);
+		rc = -EAGAIN;
+		goto els_err;
+	}
+	if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: link is not ready\n",
+			  op);
+		rc = -EAGAIN;
+		goto els_err;
+	}
+
+	if (!(test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))) {
+		QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: fcport not ready\n", op);
+		rc = -EINVAL;
+		goto els_err;
+	}
+
+retry_els:
+	els_req = qedf_alloc_cmd(fcport, QEDF_ELS);
+	if (!els_req) {
+		current_time = jiffies / HZ;
+		if ((current_time - start_time) > 10) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+				   "els: Failed els 0x%x\n", op);
+			rc = -ENOMEM;
+			goto els_err;
+		}
+		mdelay(20 * USEC_PER_MSEC);
+		goto retry_els;
+	}
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "initiate_els els_req = "
+		   "0x%p cb_arg = %p xid = %x\n", els_req, cb_arg,
+		   els_req->xid);
+	els_req->sc_cmd = NULL;
+	els_req->cmd_type = QEDF_ELS;
+	els_req->fcport = fcport;
+	els_req->cb_func = cb_func;
+	cb_arg->io_req = els_req;
+	cb_arg->op = op;
+	els_req->cb_arg = cb_arg;
+	els_req->data_xfer_len = data_len;
+
+	/* Record which cpu this request is associated with */
+	els_req->cpu = smp_processor_id();
+
+	mp_req = (struct qedf_mp_req *)&(els_req->mp_req);
+	rc = qedf_init_mp_req(els_req);
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "ELS MP request init failed\n");
+		kref_put(&els_req->refcount, qedf_release_cmd);
+		goto els_err;
+	} else {
+		rc = 0;
+	}
+
+	/* Fill ELS Payload */
+	if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS)) {
+		memcpy(mp_req->req_buf, data, data_len);
+	} else {
+		QEDF_ERR(&(qedf->dbg_ctx), "Invalid ELS op 0x%x\n", op);
+		els_req->cb_func = NULL;
+		els_req->cb_arg = NULL;
+		kref_put(&els_req->refcount, qedf_release_cmd);
+		rc = -EINVAL;
+	}
+
+	if (rc)
+		goto els_err;
+
+	/* Fill FC header */
+	fc_hdr = &(mp_req->req_fc_hdr);
+
+	did = fcport->rdata->ids.port_id;
+	sid = fcport->sid;
+
+	__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS_REQ, sid, did,
+			   FC_TYPE_ELS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
+			   FC_FC_SEQ_INIT, 0);
+
+	/* Obtain exchange id */
+	xid = els_req->xid;
+
+	/* Initialize task context for this IO request */
+	task = qedf_get_task_mem(&qedf->tasks, xid);
+	qedf_init_mp_task(els_req, task);
+
+	/* Put timer on original I/O request */
+	if (timer_msec)
+		qedf_cmd_timer_set(qedf, els_req, timer_msec);
+
+	qedf_add_to_sq(fcport, xid, 0, FCOE_TASK_TYPE_MIDPATH, 0);
+
+	/* Ring doorbell */
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Ringing doorbell for ELS "
+		   "req\n");
+	qedf_ring_doorbell(fcport);
+els_err:
+	return rc;
+}
+
+void qedf_process_els_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *els_req)
+{
+	struct fcoe_task_context *task_ctx;
+	struct scsi_cmnd *sc_cmd;
+	uint16_t xid;
+	struct fcoe_cqe_midpath_info *mp_info;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered with xid = 0x%x"
+		   " cmd_type = %d.\n", els_req->xid, els_req->cmd_type);
+
+	/* Kill the ELS timer */
+	cancel_delayed_work(&els_req->timeout_work);
+
+	xid = els_req->xid;
+	task_ctx = qedf_get_task_mem(&qedf->tasks, xid);
+	sc_cmd = els_req->sc_cmd;
+
+	/* Get ELS response length from CQE */
+	mp_info = &cqe->cqe_info.midpath_info;
+	els_req->mp_req.resp_len = mp_info->data_placement_size;
+
+	/* Parse ELS response */
+	if ((els_req->cb_func) && (els_req->cb_arg)) {
+		els_req->cb_func(els_req->cb_arg);
+		els_req->cb_arg = NULL;
+	}
+
+	kref_put(&els_req->refcount, qedf_release_cmd);
+}
+
+static void qedf_rrq_compl(struct qedf_els_cb_arg *cb_arg)
+{
+	struct qedf_ioreq *orig_io_req;
+	struct qedf_ioreq *rrq_req;
+	struct qedf_ctx *qedf;
+	int refcount;
+
+	rrq_req = cb_arg->io_req;
+	qedf = rrq_req->fcport->qedf;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered.\n");
+
+	orig_io_req = cb_arg->aborted_io_req;
+
+	if (!orig_io_req)
+		goto out_free;
+
+	if (rrq_req->event != QEDF_IOREQ_EV_ELS_TMO &&
+	    rrq_req->event != QEDF_IOREQ_EV_ELS_ERR_DETECT)
+		cancel_delayed_work_sync(&orig_io_req->timeout_work);
+
+	refcount = atomic_read(&orig_io_req->refcount.refcount);
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "rrq_compl: orig io = %p,"
+		   " orig xid = 0x%x, rrq_xid = 0x%x, refcount=%d\n",
+		   orig_io_req, orig_io_req->xid, rrq_req->xid, refcount);
+
+	/* This should return the aborted io_req to the command pool */
+	if (orig_io_req)
+		kref_put(&orig_io_req->refcount, qedf_release_cmd);
+
+out_free:
+	kfree(cb_arg);
+}
+
+/* Assumes kref is already held by caller */
+int qedf_send_rrq(struct qedf_ioreq *aborted_io_req)
+{
+
+	struct fc_els_rrq rrq;
+	struct qedf_rport *fcport;
+	struct fc_lport *lport;
+	struct qedf_els_cb_arg *cb_arg = NULL;
+	struct qedf_ctx *qedf;
+	uint32_t sid;
+	uint32_t r_a_tov;
+	int rc;
+
+	if (!aborted_io_req) {
+		QEDF_ERR(NULL, "abort_io_req is NULL.\n");
+		return -EINVAL;
+	}
+
+	fcport = aborted_io_req->fcport;
+
+	/* Check that fcport is still offloaded */
+	if (!(test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))) {
+		QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
+		return -EINVAL;
+	}
+
+	if (!fcport->qedf) {
+		QEDF_ERR(NULL, "fcport->qedf is NULL.\n");
+		return -EINVAL;
+	}
+
+	qedf = fcport->qedf;
+	lport = qedf->lport;
+	sid = fcport->sid;
+	r_a_tov = lport->r_a_tov;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending RRQ orig "
+		   "io = %p, orig_xid = 0x%x\n", aborted_io_req,
+		   aborted_io_req->xid);
+	memset(&rrq, 0, sizeof(rrq));
+
+	cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
+	if (!cb_arg) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
+			  "RRQ\n");
+		rc = -ENOMEM;
+		goto rrq_err;
+	}
+
+	cb_arg->aborted_io_req = aborted_io_req;
+
+	rrq.rrq_cmd = ELS_RRQ;
+	hton24(rrq.rrq_s_id, sid);
+	rrq.rrq_ox_id = htons(aborted_io_req->xid);
+	rrq.rrq_rx_id =
+	    htons(aborted_io_req->task->tstorm_st_context.read_write.rx_id);
+
+	rc = qedf_initiate_els(fcport, ELS_RRQ, &rrq, sizeof(rrq),
+	    qedf_rrq_compl, cb_arg, r_a_tov);
+
+rrq_err:
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "RRQ failed - release orig io "
+			  "req 0x%x\n", aborted_io_req->xid);
+		kfree(cb_arg);
+		kref_put(&aborted_io_req->refcount, qedf_release_cmd);
+	}
+	return rc;
+}
+
+static void qedf_process_l2_frame_compl(struct qedf_rport *fcport,
+					struct fc_frame *fp,
+					u16 l2_oxid)
+{
+	struct fc_lport *lport = fcport->qedf->lport;
+	struct fc_frame_header *fh;
+	u32 crc;
+
+	fh = (struct fc_frame_header *)fc_frame_header_get(fp);
+
+	/* Set the OXID we return to what libfc used */
+	if (l2_oxid != FC_XID_UNKNOWN)
+		fh->fh_ox_id = htons(l2_oxid);
+
+	/* Setup header fields */
+	fh->fh_r_ctl = FC_RCTL_ELS_REP;
+	fh->fh_type = FC_TYPE_ELS;
+	/* Last sequence, end sequence */
+	fh->fh_f_ctl[0] = 0x98;
+	hton24(fh->fh_d_id, lport->port_id);
+	hton24(fh->fh_s_id, fcport->rdata->ids.port_id);
+	fh->fh_rx_id = 0xffff;
+
+	/* Set frame attributes */
+	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);
+
+	/* Send completed request to libfc */
+	fc_exch_recv(lport, fp);
+}
+
+/*
+ * In instances where an ELS command times out we may need to restart the
+ * rport by logging out and then logging back in.
+ */
+void qedf_restart_rport(struct qedf_rport *fcport)
+{
+	struct fc_lport *lport;
+	struct fc_rport_priv *rdata;
+	u32 port_id;
+
+	if (!fcport)
+		return;
+
+	rdata = fcport->rdata;
+	if (rdata) {
+		lport = fcport->qedf->lport;
+		port_id = rdata->ids.port_id;
+		QEDF_ERR(&(fcport->qedf->dbg_ctx),
+		    "LOGO port_id=%x.\n", port_id);
+		fc_rport_logoff(rdata);
+		/* Recreate the rport and log back in */
+		rdata = fc_rport_create(lport, port_id);
+		if (rdata)
+			fc_rport_login(rdata);
+	}
+}
+
+static void qedf_l2_els_compl(struct qedf_els_cb_arg *cb_arg)
+{
+	struct qedf_ioreq *els_req;
+	struct qedf_rport *fcport;
+	struct qedf_mp_req *mp_req;
+	struct fc_frame *fp;
+	struct fc_frame_header *fh, *mp_fc_hdr;
+	void *resp_buf, *fc_payload;
+	u32 resp_len;
+	u16 l2_oxid;
+
+	l2_oxid = cb_arg->l2_oxid;
+	els_req = cb_arg->io_req;
+
+	if (!els_req) {
+		QEDF_ERR(NULL, "els_req is NULL.\n");
+		goto free_arg;
+	}
+
+	/*
+	 * If we are flushing the command just free the cb_arg as none of the
+	 * response data will be valid.
+	 */
+	if (els_req->event == QEDF_IOREQ_EV_ELS_FLUSH)
+		goto free_arg;
+
+	fcport = els_req->fcport;
+	mp_req = &(els_req->mp_req);
+	mp_fc_hdr = &(mp_req->resp_fc_hdr);
+	resp_len = mp_req->resp_len;
+	resp_buf = mp_req->resp_buf;
+
+	/*
+	 * If a middle path ELS command times out, don't try to return
+	 * the command but rather do any internal cleanup and then libfc
+	 * timeout the command and clean up its internal resources.
+	 */
+	if (els_req->event == QEDF_IOREQ_EV_ELS_TMO) {
+		/*
+		 * If ADISC times out, libfc will timeout the exchange and then
+		 * try to send a PLOGI which will timeout since the session is
+		 * still offloaded.  Force libfc to logout the session which
+		 * will offload the connection and allow the PLOGI response to
+		 * flow over the LL2 path.
+		 */
+		if (cb_arg->op == ELS_ADISC)
+			qedf_restart_rport(fcport);
+		return;
+	}
+
+	if (sizeof(struct fc_frame_header) + resp_len > QEDF_PAGE_SIZE) {
+		QEDF_ERR(&(fcport->qedf->dbg_ctx), "resp_len is "
+		   "beyond page size.\n");
+		goto free_arg;
+	}
+
+	fp = fc_frame_alloc(fcport->qedf->lport, resp_len);
+	if (!fp) {
+		QEDF_ERR(&(fcport->qedf->dbg_ctx),
+		    "fc_frame_alloc failure.\n");
+		return;
+	}
+
+	/* Copy frame header from firmware into fp */
+	fh = (struct fc_frame_header *)fc_frame_header_get(fp);
+	memcpy(fh, mp_fc_hdr, sizeof(struct fc_frame_header));
+
+	/* Copy payload from firmware into fp */
+	fc_payload = fc_frame_payload_get(fp, resp_len);
+	memcpy(fc_payload, resp_buf, resp_len);
+
+	QEDF_INFO(&(fcport->qedf->dbg_ctx), QEDF_LOG_ELS,
+	    "Completing OX_ID 0x%x back to libfc.\n", l2_oxid);
+	qedf_process_l2_frame_compl(fcport, fp, l2_oxid);
+
+free_arg:
+	kfree(cb_arg);
+}
+
+int qedf_send_adisc(struct qedf_rport *fcport, struct fc_frame *fp)
+{
+	struct fc_els_adisc *adisc;
+	struct fc_frame_header *fh;
+	struct fc_lport *lport = fcport->qedf->lport;
+	struct qedf_els_cb_arg *cb_arg = NULL;
+	struct qedf_ctx *qedf;
+	uint32_t r_a_tov = lport->r_a_tov;
+	int rc;
+
+	qedf = fcport->qedf;
+	fh = fc_frame_header_get(fp);
+
+	cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
+	if (!cb_arg) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
+			  "ADISC\n");
+		rc = -ENOMEM;
+		goto adisc_err;
+	}
+	cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+	    "Sending ADISC ox_id=0x%x.\n", cb_arg->l2_oxid);
+
+	adisc = fc_frame_payload_get(fp, sizeof(*adisc));
+
+	rc = qedf_initiate_els(fcport, ELS_ADISC, adisc, sizeof(*adisc),
+	    qedf_l2_els_compl, cb_arg, r_a_tov);
+
+adisc_err:
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "ADISC failed.\n");
+		kfree(cb_arg);
+	}
+	return rc;
+}
+
+static void qedf_srr_compl(struct qedf_els_cb_arg *cb_arg)
+{
+	struct qedf_ioreq *orig_io_req;
+	struct qedf_ioreq *srr_req;
+	struct qedf_mp_req *mp_req;
+	struct fc_frame_header *mp_fc_hdr, *fh;
+	struct fc_frame *fp;
+	void *resp_buf, *fc_payload;
+	u32 resp_len;
+	struct fc_lport *lport;
+	struct qedf_ctx *qedf;
+	int refcount;
+	u8 opcode;
+
+	srr_req = cb_arg->io_req;
+	qedf = srr_req->fcport->qedf;
+	lport = qedf->lport;
+
+	orig_io_req = cb_arg->aborted_io_req;
+
+	if (!orig_io_req)
+		goto out_free;
+
+	clear_bit(QEDF_CMD_SRR_SENT, &orig_io_req->flags);
+
+	if (srr_req->event != QEDF_IOREQ_EV_ELS_TMO &&
+	    srr_req->event != QEDF_IOREQ_EV_ELS_ERR_DETECT)
+		cancel_delayed_work_sync(&orig_io_req->timeout_work);
+
+	refcount = atomic_read(&orig_io_req->refcount.refcount);
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered: orig_io=%p,"
+		   " orig_io_xid=0x%x, rec_xid=0x%x, refcount=%d\n",
+		   orig_io_req, orig_io_req->xid, srr_req->xid, refcount);
+
+	/* If a SRR times out, simply free resources */
+	if (srr_req->event == QEDF_IOREQ_EV_ELS_TMO)
+		goto out_free;
+
+	/* Normalize response data into struct fc_frame */
+	mp_req = &(srr_req->mp_req);
+	mp_fc_hdr = &(mp_req->resp_fc_hdr);
+	resp_len = mp_req->resp_len;
+	resp_buf = mp_req->resp_buf;
+
+	fp = fc_frame_alloc(lport, resp_len);
+	if (!fp) {
+		QEDF_ERR(&(qedf->dbg_ctx),
+		    "fc_frame_alloc failure.\n");
+		goto out_free;
+	}
+
+	/* Copy frame header from firmware into fp */
+	fh = (struct fc_frame_header *)fc_frame_header_get(fp);
+	memcpy(fh, mp_fc_hdr, sizeof(struct fc_frame_header));
+
+	/* Copy payload from firmware into fp */
+	fc_payload = fc_frame_payload_get(fp, resp_len);
+	memcpy(fc_payload, resp_buf, resp_len);
+
+	opcode = fc_frame_payload_op(fp);
+	switch (opcode) {
+	case ELS_LS_ACC:
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+		    "SRR success.\n");
+		break;
+	case ELS_LS_RJT:
+		QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_ELS,
+		    "SRR rejected.\n");
+		qedf_initiate_abts(orig_io_req, true);
+		break;
+	}
+
+	fc_frame_free(fp);
+out_free:
+	/* Put reference for original command since SRR completed */
+	kref_put(&orig_io_req->refcount, qedf_release_cmd);
+	kfree(cb_arg);
+}
+
+static int qedf_send_srr(struct qedf_ioreq *orig_io_req, u32 offset, u8 r_ctl)
+{
+	struct fcp_srr srr;
+	struct qedf_ctx *qedf;
+	struct qedf_rport *fcport;
+	struct fc_lport *lport;
+	struct qedf_els_cb_arg *cb_arg = NULL;
+	u32 sid, r_a_tov;
+	int rc;
+
+	if (!orig_io_req) {
+		QEDF_ERR(NULL, "orig_io_req is NULL.\n");
+		return -EINVAL;
+	}
+
+	fcport = orig_io_req->fcport;
+
+	/* Check that fcport is still offloaded */
+	if (!(test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))) {
+		QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
+		return -EINVAL;
+	}
+
+	if (!fcport->qedf) {
+		QEDF_ERR(NULL, "fcport->qedf is NULL.\n");
+		return -EINVAL;
+	}
+
+	/* Take reference until SRR command completion */
+	kref_get(&orig_io_req->refcount);
+
+	qedf = fcport->qedf;
+	lport = qedf->lport;
+	sid = fcport->sid;
+	r_a_tov = lport->r_a_tov;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending SRR orig_io=%p, "
+		   "orig_xid=0x%x\n", orig_io_req, orig_io_req->xid);
+	memset(&srr, 0, sizeof(srr));
+
+	cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
+	if (!cb_arg) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
+			  "SRR\n");
+		rc = -ENOMEM;
+		goto srr_err;
+	}
+
+	cb_arg->aborted_io_req = orig_io_req;
+
+	srr.srr_op = ELS_SRR;
+	srr.srr_ox_id = htons(orig_io_req->xid);
+	srr.srr_rx_id = htons(orig_io_req->rx_id);
+	srr.srr_rel_off = htonl(offset);
+	srr.srr_r_ctl = r_ctl;
+
+	rc = qedf_initiate_els(fcport, ELS_SRR, &srr, sizeof(srr),
+	    qedf_srr_compl, cb_arg, r_a_tov);
+
+srr_err:
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "SRR failed - release orig_io_req"
+			  "=0x%x\n", orig_io_req->xid);
+		kfree(cb_arg);
+		/* If we fail to queue SRR, send ABTS to orig_io */
+		qedf_initiate_abts(orig_io_req, true);
+		kref_put(&orig_io_req->refcount, qedf_release_cmd);
+	} else
+		/* Tell other threads that SRR is in progress */
+		set_bit(QEDF_CMD_SRR_SENT, &orig_io_req->flags);
+
+	return rc;
+}
+
+static void qedf_initiate_seq_cleanup(struct qedf_ioreq *orig_io_req,
+	u32 offset, u8 r_ctl)
+{
+	struct qedf_rport *fcport;
+	unsigned long flags;
+	struct qedf_els_cb_arg *cb_arg;
+
+	fcport = orig_io_req->fcport;
+
+	QEDF_INFO(&(fcport->qedf->dbg_ctx), QEDF_LOG_ELS,
+	    "Doing sequence cleanup for xid=0x%x offset=%u.\n",
+	    orig_io_req->xid, offset);
+
+	cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
+	if (!cb_arg) {
+		QEDF_ERR(&(fcport->qedf->dbg_ctx), "Unable to allocate cb_arg "
+			  "for sequence cleanup\n");
+		return;
+	}
+
+	/* Get reference for cleanup request */
+	kref_get(&orig_io_req->refcount);
+
+	orig_io_req->cmd_type = QEDF_SEQ_CLEANUP;
+	cb_arg->offset = offset;
+	cb_arg->r_ctl = r_ctl;
+	orig_io_req->cb_arg = cb_arg;
+
+	qedf_cmd_timer_set(fcport->qedf, orig_io_req,
+	    QEDF_CLEANUP_TIMEOUT * HZ);
+
+	spin_lock_irqsave(&fcport->rport_lock, flags);
+
+	qedf_add_to_sq(fcport, orig_io_req->xid, 0,
+	    FCOE_TASK_TYPE_SEQUENCE_CLEANUP, offset);
+	qedf_ring_doorbell(fcport);
+
+	spin_unlock_irqrestore(&fcport->rport_lock, flags);
+}
+
+void qedf_process_seq_cleanup_compl(struct qedf_ctx *qedf,
+	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req)
+{
+	int rc;
+	struct qedf_els_cb_arg *cb_arg;
+
+	cb_arg = io_req->cb_arg;
+
+	/* If we timed out just free resources */
+	if (io_req->event == QEDF_IOREQ_EV_ELS_TMO || !cqe)
+		goto free;
+
+	/* Kill the timer we put on the request */
+	cancel_delayed_work_sync(&io_req->timeout_work);
+
+	rc = qedf_send_srr(io_req, cb_arg->offset, cb_arg->r_ctl);
+	if (rc)
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to send SRR, I/O will "
+		    "abort, xid=0x%x.\n", io_req->xid);
+free:
+	kfree(cb_arg);
+	kref_put(&io_req->refcount, qedf_release_cmd);
+}
+
+static bool qedf_requeue_io_req(struct qedf_ioreq *orig_io_req)
+{
+	struct qedf_rport *fcport;
+	struct qedf_ioreq *new_io_req;
+	unsigned long flags;
+	bool rc = false;
+
+	fcport = orig_io_req->fcport;
+	if (!fcport) {
+		QEDF_ERR(NULL, "fcport is NULL.\n");
+		goto out;
+	}
+
+	if (!orig_io_req->sc_cmd) {
+		QEDF_ERR(&(fcport->qedf->dbg_ctx), "sc_cmd is NULL for "
+		    "xid=0x%x.\n", orig_io_req->xid);
+		goto out;
+	}
+
+	new_io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD);
+	if (!new_io_req) {
+		QEDF_ERR(&(fcport->qedf->dbg_ctx), "Could not allocate new "
+		    "io_req.\n");
+		goto out;
+	}
+
+	new_io_req->sc_cmd = orig_io_req->sc_cmd;
+
+	/*
+	 * This keeps the sc_cmd struct from being returned to the tape
+	 * driver and being requeued twice. We do need to put a reference
+	 * for the original I/O request since we will not do a SCSI completion
+	 * for it.
+	 */
+	orig_io_req->sc_cmd = NULL;
+	kref_put(&orig_io_req->refcount, qedf_release_cmd);
+
+	spin_lock_irqsave(&fcport->rport_lock, flags);
+
+	/* kref for new command released in qedf_post_io_req on error */
+	if (qedf_post_io_req(fcport, new_io_req)) {
+		QEDF_ERR(&(fcport->qedf->dbg_ctx), "Unable to post io_req\n");
+		/* Return SQE to pool */
+		atomic_inc(&fcport->free_sqes);
+	} else {
+		QEDF_INFO(&(fcport->qedf->dbg_ctx), QEDF_LOG_ELS,
+		    "Reissued SCSI command from  orig_xid=0x%x on "
+		    "new_xid=0x%x.\n", orig_io_req->xid, new_io_req->xid);
+		/*
+		 * Abort the original I/O but do not return SCSI command as
+		 * it has been reissued on another OX_ID.
+		 */
+		spin_unlock_irqrestore(&fcport->rport_lock, flags);
+		qedf_initiate_abts(orig_io_req, false);
+		goto out;
+	}
+
+	spin_unlock_irqrestore(&fcport->rport_lock, flags);
+out:
+	return rc;
+}
+
+
+static void qedf_rec_compl(struct qedf_els_cb_arg *cb_arg)
+{
+	struct qedf_ioreq *orig_io_req;
+	struct qedf_ioreq *rec_req;
+	struct qedf_mp_req *mp_req;
+	struct fc_frame_header *mp_fc_hdr, *fh;
+	struct fc_frame *fp;
+	void *resp_buf, *fc_payload;
+	u32 resp_len;
+	struct fc_lport *lport;
+	struct qedf_ctx *qedf;
+	int refcount;
+	enum fc_rctl r_ctl;
+	struct fc_els_ls_rjt *rjt;
+	struct fc_els_rec_acc *acc;
+	u8 opcode;
+	u32 offset, e_stat;
+	struct scsi_cmnd *sc_cmd;
+	bool srr_needed = false;
+
+	rec_req = cb_arg->io_req;
+	qedf = rec_req->fcport->qedf;
+	lport = qedf->lport;
+
+	orig_io_req = cb_arg->aborted_io_req;
+
+	if (!orig_io_req)
+		goto out_free;
+
+	if (rec_req->event != QEDF_IOREQ_EV_ELS_TMO &&
+	    rec_req->event != QEDF_IOREQ_EV_ELS_ERR_DETECT)
+		cancel_delayed_work_sync(&orig_io_req->timeout_work);
+
+	refcount = atomic_read(&orig_io_req->refcount.refcount);
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered: orig_io=%p,"
+		   " orig_io_xid=0x%x, rec_xid=0x%x, refcount=%d\n",
+		   orig_io_req, orig_io_req->xid, rec_req->xid, refcount);
+
+	/* If a REC times out, free resources */
+	if (rec_req->event == QEDF_IOREQ_EV_ELS_TMO)
+		goto out_free;
+
+	/* Normalize response data into struct fc_frame */
+	mp_req = &(rec_req->mp_req);
+	mp_fc_hdr = &(mp_req->resp_fc_hdr);
+	resp_len = mp_req->resp_len;
+	acc = resp_buf = mp_req->resp_buf;
+
+	fp = fc_frame_alloc(lport, resp_len);
+	if (!fp) {
+		QEDF_ERR(&(qedf->dbg_ctx),
+		    "fc_frame_alloc failure.\n");
+		goto out_free;
+	}
+
+	/* Copy frame header from firmware into fp */
+	fh = (struct fc_frame_header *)fc_frame_header_get(fp);
+	memcpy(fh, mp_fc_hdr, sizeof(struct fc_frame_header));
+
+	/* Copy payload from firmware into fp */
+	fc_payload = fc_frame_payload_get(fp, resp_len);
+	memcpy(fc_payload, resp_buf, resp_len);
+
+	opcode = fc_frame_payload_op(fp);
+	if (opcode == ELS_LS_RJT) {
+		rjt = fc_frame_payload_get(fp, sizeof(*rjt));
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+		    "Received LS_RJT for REC: er_reason=0x%x, "
+		    "er_explan=0x%x.\n", rjt->er_reason, rjt->er_explan);
+		/*
+		 * The following response(s) mean that we need to reissue the
+		 * request on another exchange.  We need to do this without
+		 * informing the upper layers lest it cause an application
+		 * error.
+		 */
+		if ((rjt->er_reason == ELS_RJT_LOGIC ||
+		    rjt->er_reason == ELS_RJT_UNAB) &&
+		    rjt->er_explan == ELS_EXPL_OXID_RXID) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+			    "Handle CMD LOST case.\n");
+			qedf_requeue_io_req(orig_io_req);
+		}
+	} else if (opcode == ELS_LS_ACC) {
+		offset = ntohl(acc->reca_fc4value);
+		e_stat = ntohl(acc->reca_e_stat);
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+		    "Received LS_ACC for REC: offset=0x%x, e_stat=0x%x.\n",
+		    offset, e_stat);
+		if (e_stat & ESB_ST_SEQ_INIT)  {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+			    "Target has the seq init\n");
+			goto out_free_frame;
+		}
+		sc_cmd = orig_io_req->sc_cmd;
+		if (!sc_cmd) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+			    "sc_cmd is NULL for xid=0x%x.\n",
+			    orig_io_req->xid);
+			goto out_free_frame;
+		}
+		/* SCSI write case */
+		if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
+			if (offset == orig_io_req->data_xfer_len) {
+				QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+				    "WRITE - response lost.\n");
+				r_ctl = FC_RCTL_DD_CMD_STATUS;
+				srr_needed = true;
+				offset = 0;
+			} else {
+				QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+				    "WRITE - XFER_RDY/DATA lost.\n");
+				r_ctl = FC_RCTL_DD_DATA_DESC;
+				/* Use data from warning CQE instead of REC */
+				offset = orig_io_req->tx_buf_off;
+			}
+		/* SCSI read case */
+		} else {
+			if (orig_io_req->rx_buf_off ==
+			    orig_io_req->data_xfer_len) {
+				QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+				    "READ - response lost.\n");
+				srr_needed = true;
+				r_ctl = FC_RCTL_DD_CMD_STATUS;
+				offset = 0;
+			} else {
+				QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+				    "READ - DATA lost.\n");
+				/*
+				 * For read case we always set the offset to 0
+				 * for sequence recovery task.
+				 */
+				offset = 0;
+				r_ctl = FC_RCTL_DD_SOL_DATA;
+			}
+		}
+
+		if (srr_needed)
+			qedf_send_srr(orig_io_req, offset, r_ctl);
+		else
+			qedf_initiate_seq_cleanup(orig_io_req, offset, r_ctl);
+	}
+
+out_free_frame:
+	fc_frame_free(fp);
+out_free:
+	/* Put reference for original command since REC completed */
+	kref_put(&orig_io_req->refcount, qedf_release_cmd);
+	kfree(cb_arg);
+}
+
+/* Assumes kref is already held by caller */
+int qedf_send_rec(struct qedf_ioreq *orig_io_req)
+{
+
+	struct fc_els_rec rec;
+	struct qedf_rport *fcport;
+	struct fc_lport *lport;
+	struct qedf_els_cb_arg *cb_arg = NULL;
+	struct qedf_ctx *qedf;
+	uint32_t sid;
+	uint32_t r_a_tov;
+	int rc;
+
+	if (!orig_io_req) {
+		QEDF_ERR(NULL, "orig_io_req is NULL.\n");
+		return -EINVAL;
+	}
+
+	fcport = orig_io_req->fcport;
+
+	/* Check that fcport is still offloaded */
+	if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
+		QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
+		return -EINVAL;
+	}
+
+	if (!fcport->qedf) {
+		QEDF_ERR(NULL, "fcport->qedf is NULL.\n");
+		return -EINVAL;
+	}
+
+	/* Take reference until REC command completion */
+	kref_get(&orig_io_req->refcount);
+
+	qedf = fcport->qedf;
+	lport = qedf->lport;
+	sid = fcport->sid;
+	r_a_tov = lport->r_a_tov;
+
+	memset(&rec, 0, sizeof(rec));
+
+	cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
+	if (!cb_arg) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
+			  "REC\n");
+		rc = -ENOMEM;
+		goto rec_err;
+	}
+
+	cb_arg->aborted_io_req = orig_io_req;
+
+	rec.rec_cmd = ELS_REC;
+	hton24(rec.rec_s_id, sid);
+	rec.rec_ox_id = htons(orig_io_req->xid);
+	rec.rec_rx_id =
+	    htons(orig_io_req->task->tstorm_st_context.read_write.rx_id);
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending REC orig_io=%p, "
+	   "orig_xid=0x%x rx_id=0x%x\n", orig_io_req,
+	   orig_io_req->xid, rec.rec_rx_id);
+	rc = qedf_initiate_els(fcport, ELS_REC, &rec, sizeof(rec),
+	    qedf_rec_compl, cb_arg, r_a_tov);
+
+rec_err:
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "REC failed - release orig_io_req"
+			  "=0x%x\n", orig_io_req->xid);
+		kfree(cb_arg);
+		kref_put(&orig_io_req->refcount, qedf_release_cmd);
+	}
+	return rc;
+}

drivers/scsi/qedf/qedf_fip.c

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include "qedf.h"
+
+extern const struct qed_fcoe_ops *qed_ops;
+/*
+ * FIP VLAN functions that will eventually move to libfcoe.
+ */
+
+void qedf_fcoe_send_vlan_req(struct qedf_ctx *qedf)
+{
+	struct sk_buff *skb;
+	char *eth_fr;
+	int fr_len;
+	struct fip_vlan *vlan;
+#define MY_FIP_ALL_FCF_MACS        ((__u8[6]) { 1, 0x10, 0x18, 1, 0, 2 })
+	static u8 my_fcoe_all_fcfs[ETH_ALEN] = MY_FIP_ALL_FCF_MACS;
+
+	skb = dev_alloc_skb(sizeof(struct fip_vlan));
+	if (!skb)
+		return;
+
+	fr_len = sizeof(*vlan);
+	eth_fr = (char *)skb->data;
+	vlan = (struct fip_vlan *)eth_fr;
+
+	memset(vlan, 0, sizeof(*vlan));
+	ether_addr_copy(vlan->eth.h_source, qedf->mac);
+	ether_addr_copy(vlan->eth.h_dest, my_fcoe_all_fcfs);
+	vlan->eth.h_proto = htons(ETH_P_FIP);
+
+	vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+	vlan->fip.fip_op = htons(FIP_OP_VLAN);
+	vlan->fip.fip_subcode = FIP_SC_VL_REQ;
+	vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
+
+	vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
+	vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
+	ether_addr_copy(vlan->desc.mac.fd_mac, qedf->mac);
+
+	vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
+	vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
+	put_unaligned_be64(qedf->lport->wwnn, &vlan->desc.wwnn.fd_wwn);
+
+	skb_put(skb, sizeof(*vlan));
+	skb->protocol = htons(ETH_P_FIP);
+	skb_reset_mac_header(skb);
+	skb_reset_network_header(skb);
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Sending FIP VLAN "
+		   "request.");
+
+	if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Cannot send vlan request "
+		    "because link is not up.\n");
+
+		kfree_skb(skb);
+		return;
+	}
+	qed_ops->ll2->start_xmit(qedf->cdev, skb);
+}
+
+static void qedf_fcoe_process_vlan_resp(struct qedf_ctx *qedf,
+	struct sk_buff *skb)
+{
+	struct fip_header *fiph;
+	struct fip_desc *desc;
+	u16 vid = 0;
+	ssize_t rlen;
+	size_t dlen;
+
+	fiph = (struct fip_header *)(((void *)skb->data) + 2 * ETH_ALEN + 2);
+
+	rlen = ntohs(fiph->fip_dl_len) * 4;
+	desc = (struct fip_desc *)(fiph + 1);
+	while (rlen > 0) {
+		dlen = desc->fip_dlen * FIP_BPW;
+		switch (desc->fip_dtype) {
+		case FIP_DT_VLAN:
+			vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
+			break;
+		}
+		desc = (struct fip_desc *)((char *)desc + dlen);
+		rlen -= dlen;
+	}
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "VLAN response, "
+		   "vid=0x%x.\n", vid);
+
+	if (vid > 0 && qedf->vlan_id != vid) {
+		qedf_set_vlan_id(qedf, vid);
+
+		/* Inform waiter that it's ok to call fcoe_ctlr_link up() */
+		complete(&qedf->fipvlan_compl);
+	}
+}
+
+void qedf_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+	struct qedf_ctx *qedf = container_of(fip, struct qedf_ctx, ctlr);
+	struct ethhdr *eth_hdr;
+	struct vlan_ethhdr *vlan_hdr;
+	struct fip_header *fiph;
+	u16 op, vlan_tci = 0;
+	u8 sub;
+
+	if (!test_bit(QEDF_LL2_STARTED, &qedf->flags)) {
+		QEDF_WARN(&(qedf->dbg_ctx), "LL2 not started\n");
+		kfree_skb(skb);
+		return;
+	}
+
+	fiph = (struct fip_header *) ((void *)skb->data + 2 * ETH_ALEN + 2);
+	eth_hdr = (struct ethhdr *)skb_mac_header(skb);
+	op = ntohs(fiph->fip_op);
+	sub = fiph->fip_subcode;
+
+	if (!qedf->vlan_hw_insert) {
+		vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, sizeof(*vlan_hdr)
+		    - sizeof(*eth_hdr));
+		memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
+		vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
+		vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
+		vlan_hdr->h_vlan_TCI = vlan_tci =  htons(qedf->vlan_id);
+	}
+
+	/* Update eth_hdr since we added a VLAN tag */
+	eth_hdr = (struct ethhdr *)skb_mac_header(skb);
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FIP frame send: "
+	    "dest=%pM op=%x sub=%x vlan=%04x.", eth_hdr->h_dest, op, sub,
+	    ntohs(vlan_tci));
+	if (qedf_dump_frames)
+		print_hex_dump(KERN_WARNING, "fip ", DUMP_PREFIX_OFFSET, 16, 1,
+		    skb->data, skb->len, false);
+
+	qed_ops->ll2->start_xmit(qedf->cdev, skb);
+}
+
+/* Process incoming FIP frames. */
+void qedf_fip_recv(struct qedf_ctx *qedf, struct sk_buff *skb)
+{
+	struct ethhdr *eth_hdr;
+	struct fip_header *fiph;
+	struct fip_desc *desc;
+	struct fip_mac_desc *mp;
+	struct fip_wwn_desc *wp;
+	struct fip_vn_desc *vp;
+	size_t rlen, dlen;
+	uint32_t cvl_port_id;
+	__u8 cvl_mac[ETH_ALEN];
+	u16 op;
+	u8 sub;
+
+	eth_hdr = (struct ethhdr *)skb_mac_header(skb);
+	fiph = (struct fip_header *) ((void *)skb->data + 2 * ETH_ALEN + 2);
+	op = ntohs(fiph->fip_op);
+	sub = fiph->fip_subcode;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FIP frame received: "
+	    "skb=%p fiph=%p source=%pM op=%x sub=%x", skb, fiph,
+	    eth_hdr->h_source, op, sub);
+	if (qedf_dump_frames)
+		print_hex_dump(KERN_WARNING, "fip ", DUMP_PREFIX_OFFSET, 16, 1,
+		    skb->data, skb->len, false);
+
+	/* Handle FIP VLAN resp in the driver */
+	if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
+		qedf_fcoe_process_vlan_resp(qedf, skb);
+		qedf->vlan_hw_insert = 0;
+		kfree_skb(skb);
+	} else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Clear virtual "
+			   "link received.\n");
+
+		/* Check that an FCF has been selected by fcoe */
+		if (qedf->ctlr.sel_fcf == NULL) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "Dropping CVL since FCF has not been selected "
+			    "yet.");
+			return;
+		}
+
+		cvl_port_id = 0;
+		memset(cvl_mac, 0, ETH_ALEN);
+		/*
+		 * We need to loop through the CVL descriptors to determine
+		 * if we want to reset the fcoe link
+		 */
+		rlen = ntohs(fiph->fip_dl_len) * FIP_BPW;
+		desc = (struct fip_desc *)(fiph + 1);
+		while (rlen >= sizeof(*desc)) {
+			dlen = desc->fip_dlen * FIP_BPW;
+			switch (desc->fip_dtype) {
+			case FIP_DT_MAC:
+				mp = (struct fip_mac_desc *)desc;
+				QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
+				    "fd_mac=%pM.\n", __func__, mp->fd_mac);
+				ether_addr_copy(cvl_mac, mp->fd_mac);
+				break;
+			case FIP_DT_NAME:
+				wp = (struct fip_wwn_desc *)desc;
+				QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
+				    "fc_wwpn=%016llx.\n",
+				    get_unaligned_be64(&wp->fd_wwn));
+				break;
+			case FIP_DT_VN_ID:
+				vp = (struct fip_vn_desc *)desc;
+				QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
+				    "fd_fc_id=%x.\n", ntoh24(vp->fd_fc_id));
+				cvl_port_id = ntoh24(vp->fd_fc_id);
+				break;
+			default:
+				/* Ignore anything else */
+				break;
+			}
+			desc = (struct fip_desc *)((char *)desc + dlen);
+			rlen -= dlen;
+		}
+
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
+		    "cvl_port_id=%06x cvl_mac=%pM.\n", cvl_port_id,
+		    cvl_mac);
+		if (cvl_port_id == qedf->lport->port_id &&
+		    ether_addr_equal(cvl_mac,
+		    qedf->ctlr.sel_fcf->fcf_mac)) {
+			fcoe_ctlr_link_down(&qedf->ctlr);
+			qedf_wait_for_upload(qedf);
+			fcoe_ctlr_link_up(&qedf->ctlr);
+		}
+		kfree_skb(skb);
+	} else {
+		/* Everything else is handled by libfcoe */
+		__skb_pull(skb, ETH_HLEN);
+		fcoe_ctlr_recv(&qedf->ctlr, skb);
+	}
+}
+
+void qedf_update_src_mac(struct fc_lport *lport, u8 *addr)
+{
+	struct qedf_ctx *qedf = lport_priv(lport);
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+	    "Setting data_src_addr=%pM.\n", addr);
+	ether_addr_copy(qedf->data_src_addr, addr);
+}
+
+u8 *qedf_get_src_mac(struct fc_lport *lport)
+{
+	u8 mac[ETH_ALEN];
+	u8 port_id[3];
+	struct qedf_ctx *qedf = lport_priv(lport);
+
+	/* We need to use the lport port_id to create the data_src_addr */
+	if (is_zero_ether_addr(qedf->data_src_addr)) {
+		hton24(port_id, lport->port_id);
+		fc_fcoe_set_mac(mac, port_id);
+		qedf->ctlr.update_mac(lport, mac);
+	}
+	return qedf->data_src_addr;
+}

drivers/scsi/qedf/qedf_hsi.h

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#ifndef __QEDF_HSI__
+#define __QEDF_HSI__
+/*
+ * Add include to common target
+ */
+#include <linux/qed/common_hsi.h>
+
+/*
+ * Add include to common storage target
+ */
+#include <linux/qed/storage_common.h>
+
+/*
+ * Add include to common fcoe target for both eCore and protocol driver
+ */
+#include <linux/qed/fcoe_common.h>
+
+
+/*
+ * FCoE CQ element ABTS information
+ */
+struct fcoe_abts_info {
+	u8 r_ctl /* R_CTL in the ABTS response frame */;
+	u8 reserved0;
+	__le16 rx_id;
+	__le32 reserved2[2];
+	__le32 fc_payload[3] /* ABTS FC payload response frame */;
+};
+
+
+/*
+ * FCoE class type
+ */
+enum fcoe_class_type {
+	FCOE_TASK_CLASS_TYPE_3,
+	FCOE_TASK_CLASS_TYPE_2,
+	MAX_FCOE_CLASS_TYPE
+};
+
+
+/*
+ * FCoE CMDQ element control information
+ */
+struct fcoe_cmdqe_control {
+	__le16 conn_id;
+	u8 num_additional_cmdqes;
+	u8 cmdType;
+	/* true for ABTS request cmdqe. used in Target mode */
+#define FCOE_CMDQE_CONTROL_ABTSREQCMD_MASK  0x1
+#define FCOE_CMDQE_CONTROL_ABTSREQCMD_SHIFT 0
+#define FCOE_CMDQE_CONTROL_RESERVED1_MASK   0x7F
+#define FCOE_CMDQE_CONTROL_RESERVED1_SHIFT  1
+	u8 reserved2[4];
+};
+
+/*
+ * FCoE control + payload CMDQ element
+ */
+struct fcoe_cmdqe {
+	struct fcoe_cmdqe_control hdr;
+	u8 fc_header[24];
+	__le32 fcp_cmd_payload[8];
+};
+
+
+
+/*
+ * FCP RSP flags
+ */
+struct fcoe_fcp_rsp_flags {
+	u8 flags;
+#define FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID_MASK  0x1
+#define FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID_SHIFT 0
+#define FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID_MASK  0x1
+#define FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID_SHIFT 1
+#define FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER_MASK     0x1
+#define FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER_SHIFT    2
+#define FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER_MASK    0x1
+#define FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER_SHIFT   3
+#define FCOE_FCP_RSP_FLAGS_FCP_CONF_REQ_MASK       0x1
+#define FCOE_FCP_RSP_FLAGS_FCP_CONF_REQ_SHIFT      4
+#define FCOE_FCP_RSP_FLAGS_FCP_BIDI_FLAGS_MASK     0x7
+#define FCOE_FCP_RSP_FLAGS_FCP_BIDI_FLAGS_SHIFT    5
+};
+
+/*
+ * FCoE CQ element response information
+ */
+struct fcoe_cqe_rsp_info {
+	struct fcoe_fcp_rsp_flags rsp_flags;
+	u8 scsi_status_code;
+	__le16 retry_delay_timer;
+	__le32 fcp_resid;
+	__le32 fcp_sns_len;
+	__le32 fcp_rsp_len;
+	__le16 rx_id;
+	u8 fw_error_flags;
+#define FCOE_CQE_RSP_INFO_FW_UNDERRUN_MASK  0x1 /* FW detected underrun */
+#define FCOE_CQE_RSP_INFO_FW_UNDERRUN_SHIFT 0
+#define FCOE_CQE_RSP_INFO_RESREVED_MASK     0x7F
+#define FCOE_CQE_RSP_INFO_RESREVED_SHIFT    1
+	u8 reserved;
+	__le32 fw_residual /* Residual bytes calculated by FW */;
+};
+
+/*
+ * FCoE CQ element Target completion information
+ */
+struct fcoe_cqe_target_info {
+	__le16 rx_id;
+	__le16 reserved0;
+	__le32 reserved1[5];
+};
+
+/*
+ * FCoE error/warning reporting entry
+ */
+struct fcoe_err_report_entry {
+	__le32 err_warn_bitmap_lo /* Error bitmap lower 32 bits */;
+	__le32 err_warn_bitmap_hi /* Error bitmap higher 32 bits */;
+	/* Buffer offset the beginning of the Sequence last transmitted */
+	__le32 tx_buf_off;
+	/* Buffer offset from the beginning of the Sequence last received */
+	__le32 rx_buf_off;
+	__le16 rx_id /* RX_ID of the associated task */;
+	__le16 reserved1;
+	__le32 reserved2;
+};
+
+/*
+ * FCoE CQ element middle path information
+ */
+struct fcoe_cqe_midpath_info {
+	__le32 data_placement_size;
+	__le16 rx_id;
+	__le16 reserved0;
+	__le32 reserved1[4];
+};
+
+/*
+ * FCoE CQ element unsolicited information
+ */
+struct fcoe_unsolic_info {
+	/* BD information: Physical address and opaque data */
+	struct scsi_bd bd_info;
+	__le16 conn_id /* Connection ID the frame is associated to */;
+	__le16 pkt_len /* Packet length */;
+	u8 reserved1[4];
+};
+
+/*
+ * FCoE warning reporting entry
+ */
+struct fcoe_warning_report_entry {
+	/* BD information: Physical address and opaque data */
+	struct scsi_bd bd_info;
+	/* Buffer offset the beginning of the Sequence last transmitted */
+	__le32 buf_off;
+	__le16 rx_id /* RX_ID of the associated task */;
+	__le16 reserved1;
+};
+
+/*
+ * FCoE CQ element information
+ */
+union fcoe_cqe_info {
+	struct fcoe_cqe_rsp_info rsp_info /* Response completion information */;
+	/* Target completion information */
+	struct fcoe_cqe_target_info target_info;
+	/* Error completion information */
+	struct fcoe_err_report_entry err_info;
+	struct fcoe_abts_info abts_info /* ABTS completion information */;
+	/* Middle path completion information */
+	struct fcoe_cqe_midpath_info midpath_info;
+	/* Unsolicited packet completion information */
+	struct fcoe_unsolic_info unsolic_info;
+	/* Warning completion information (Rec Tov expiration) */
+	struct fcoe_warning_report_entry warn_info;
+};
+
+/*
+ * FCoE CQ element
+ */
+struct fcoe_cqe {
+	__le32 cqe_data;
+	/* The task identifier (OX_ID) to be completed */
+#define FCOE_CQE_TASK_ID_MASK    0xFFFF
+#define FCOE_CQE_TASK_ID_SHIFT   0
+	/*
+	 * The CQE type: 0x0 Indicating on a pending work request completion.
+	 * 0x1 - Indicating on an unsolicited event notification. use enum
+	 * fcoe_cqe_type  (use enum fcoe_cqe_type)
+	 */
+#define FCOE_CQE_CQE_TYPE_MASK   0xF
+#define FCOE_CQE_CQE_TYPE_SHIFT  16
+#define FCOE_CQE_RESERVED0_MASK  0xFFF
+#define FCOE_CQE_RESERVED0_SHIFT 20
+	__le16 reserved1;
+	__le16 fw_cq_prod;
+	union fcoe_cqe_info cqe_info;
+};
+
+/*
+ * FCoE CQE type
+ */
+enum fcoe_cqe_type {
+	/* solicited response on a R/W or middle-path SQE */
+	FCOE_GOOD_COMPLETION_CQE_TYPE,
+	FCOE_UNSOLIC_CQE_TYPE /* unsolicited packet, RQ consumed */,
+	FCOE_ERROR_DETECTION_CQE_TYPE /* timer expiration, validation error */,
+	FCOE_WARNING_CQE_TYPE /* rec_tov or rr_tov timer expiration */,
+	FCOE_EXCH_CLEANUP_CQE_TYPE /* task cleanup completed */,
+	FCOE_ABTS_CQE_TYPE /* ABTS received and task cleaned */,
+	FCOE_DUMMY_CQE_TYPE /* just increment SQ CONS */,
+	/* Task was completed wight after sending a pkt to the target */
+	FCOE_LOCAL_COMP_CQE_TYPE,
+	MAX_FCOE_CQE_TYPE
+};
+
+
+/*
+ * FCoE device type
+ */
+enum fcoe_device_type {
+	FCOE_TASK_DEV_TYPE_DISK,
+	FCOE_TASK_DEV_TYPE_TAPE,
+	MAX_FCOE_DEVICE_TYPE
+};
+
+
+
+
+/*
+ * FCoE fast path error codes
+ */
+enum fcoe_fp_error_warning_code {
+	FCOE_ERROR_CODE_XFER_OOO_RO /* XFER error codes */,
+	FCOE_ERROR_CODE_XFER_RO_NOT_ALIGNED,
+	FCOE_ERROR_CODE_XFER_NULL_BURST_LEN,
+	FCOE_ERROR_CODE_XFER_RO_GREATER_THAN_DATA2TRNS,
+	FCOE_ERROR_CODE_XFER_INVALID_PAYLOAD_SIZE,
+	FCOE_ERROR_CODE_XFER_TASK_TYPE_NOT_WRITE,
+	FCOE_ERROR_CODE_XFER_PEND_XFER_SET,
+	FCOE_ERROR_CODE_XFER_OPENED_SEQ,
+	FCOE_ERROR_CODE_XFER_FCTL,
+	FCOE_ERROR_CODE_FCP_RSP_BIDI_FLAGS_SET /* FCP RSP error codes */,
+	FCOE_ERROR_CODE_FCP_RSP_INVALID_LENGTH_FIELD,
+	FCOE_ERROR_CODE_FCP_RSP_INVALID_SNS_FIELD,
+	FCOE_ERROR_CODE_FCP_RSP_INVALID_PAYLOAD_SIZE,
+	FCOE_ERROR_CODE_FCP_RSP_PEND_XFER_SET,
+	FCOE_ERROR_CODE_FCP_RSP_OPENED_SEQ,
+	FCOE_ERROR_CODE_FCP_RSP_FCTL,
+	FCOE_ERROR_CODE_FCP_RSP_LAST_SEQ_RESET,
+	FCOE_ERROR_CODE_FCP_RSP_CONF_REQ_NOT_SUPPORTED_YET,
+	FCOE_ERROR_CODE_DATA_OOO_RO /* FCP DATA error codes */,
+	FCOE_ERROR_CODE_DATA_EXCEEDS_DEFINED_MAX_FRAME_SIZE,
+	FCOE_ERROR_CODE_DATA_EXCEEDS_DATA2TRNS,
+	FCOE_ERROR_CODE_DATA_SOFI3_SEQ_ACTIVE_SET,
+	FCOE_ERROR_CODE_DATA_SOFN_SEQ_ACTIVE_RESET,
+	FCOE_ERROR_CODE_DATA_EOFN_END_SEQ_SET,
+	FCOE_ERROR_CODE_DATA_EOFT_END_SEQ_RESET,
+	FCOE_ERROR_CODE_DATA_TASK_TYPE_NOT_READ,
+	FCOE_ERROR_CODE_DATA_FCTL_INITIATIR,
+	FCOE_ERROR_CODE_MIDPATH_INVALID_TYPE /* Middle path error codes */,
+	FCOE_ERROR_CODE_MIDPATH_SOFI3_SEQ_ACTIVE_SET,
+	FCOE_ERROR_CODE_MIDPATH_SOFN_SEQ_ACTIVE_RESET,
+	FCOE_ERROR_CODE_MIDPATH_EOFN_END_SEQ_SET,
+	FCOE_ERROR_CODE_MIDPATH_EOFT_END_SEQ_RESET,
+	FCOE_ERROR_CODE_MIDPATH_REPLY_FCTL,
+	FCOE_ERROR_CODE_MIDPATH_INVALID_REPLY,
+	FCOE_ERROR_CODE_MIDPATH_ELS_REPLY_RCTL,
+	FCOE_ERROR_CODE_COMMON_MIDDLE_FRAME_WITH_PAD /* Common error codes */,
+	FCOE_ERROR_CODE_COMMON_SEQ_INIT_IN_TCE,
+	FCOE_ERROR_CODE_COMMON_FC_HDR_RX_ID_MISMATCH,
+	FCOE_ERROR_CODE_COMMON_INCORRECT_SEQ_CNT,
+	FCOE_ERROR_CODE_COMMON_DATA_FC_HDR_FCP_TYPE_MISMATCH,
+	FCOE_ERROR_CODE_COMMON_DATA_NO_MORE_SGES,
+	FCOE_ERROR_CODE_COMMON_OPTIONAL_FC_HDR,
+	FCOE_ERROR_CODE_COMMON_READ_TCE_OX_ID_TOO_BIG,
+	FCOE_ERROR_CODE_COMMON_DATA_WAS_NOT_TRANSMITTED,
+	FCOE_ERROR_CODE_COMMON_TASK_DDF_RCTL_INFO_FIELD,
+	FCOE_ERROR_CODE_COMMON_TASK_INVALID_RCTL,
+	FCOE_ERROR_CODE_COMMON_TASK_RCTL_GENERAL_MISMATCH,
+	FCOE_ERROR_CODE_E_D_TOV_TIMER_EXPIRATION /* Timer error codes */,
+	FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION /* Timer error codes */,
+	FCOE_ERROR_CODE_RR_TOV_TIMER_EXPIRATION /* Timer error codes */,
+	/* ABTSrsp pckt arrived unexpected */
+	FCOE_ERROR_CODE_ABTS_REPLY_UNEXPECTED,
+	FCOE_ERROR_CODE_TARGET_MODE_FCP_RSP,
+	FCOE_ERROR_CODE_TARGET_MODE_FCP_XFER,
+	FCOE_ERROR_CODE_TARGET_MODE_DATA_TASK_TYPE_NOT_WRITE,
+	FCOE_ERROR_CODE_DATA_FCTL_TARGET,
+	FCOE_ERROR_CODE_TARGET_DATA_SIZE_NO_MATCH_XFER,
+	FCOE_ERROR_CODE_TARGET_DIF_CRC_CHECKSUM_ERROR,
+	FCOE_ERROR_CODE_TARGET_DIF_REF_TAG_ERROR,
+	FCOE_ERROR_CODE_TARGET_DIF_APP_TAG_ERROR,
+	MAX_FCOE_FP_ERROR_WARNING_CODE
+};
+
+
+/*
+ * FCoE RESPQ element
+ */
+struct fcoe_respqe {
+	__le16 ox_id /* OX_ID that is located in the FCP_RSP FC header */;
+	__le16 rx_id /* RX_ID that is located in the FCP_RSP FC header */;
+	__le32 additional_info;
+/* PARAM that is located in the FCP_RSP FC header */
+#define FCOE_RESPQE_PARAM_MASK            0xFFFFFF
+#define FCOE_RESPQE_PARAM_SHIFT           0
+/* Indication whther its Target-auto-rsp mode or not */
+#define FCOE_RESPQE_TARGET_AUTO_RSP_MASK  0xFF
+#define FCOE_RESPQE_TARGET_AUTO_RSP_SHIFT 24
+};
+
+
+/*
+ * FCoE slow path error codes
+ */
+enum fcoe_sp_error_code {
+	/* Error codes for Error Reporting in slow path flows */
+	FCOE_ERROR_CODE_SLOW_PATH_TOO_MANY_FUNCS,
+	FCOE_ERROR_SLOW_PATH_CODE_NO_LICENSE,
+	MAX_FCOE_SP_ERROR_CODE
+};
+
+
+/*
+ * FCoE SQE request type
+ */
+enum fcoe_sqe_request_type {
+	SEND_FCOE_CMD,
+	SEND_FCOE_MIDPATH,
+	SEND_FCOE_ABTS_REQUEST,
+	FCOE_EXCHANGE_CLEANUP,
+	FCOE_SEQUENCE_RECOVERY,
+	SEND_FCOE_XFER_RDY,
+	SEND_FCOE_RSP,
+	SEND_FCOE_RSP_WITH_SENSE_DATA,
+	SEND_FCOE_TARGET_DATA,
+	SEND_FCOE_INITIATOR_DATA,
+	/*
+	 * Xfer Continuation (==1) ready to be sent. Previous XFERs data
+	 * received successfully.
+	 */
+	SEND_FCOE_XFER_CONTINUATION_RDY,
+	SEND_FCOE_TARGET_ABTS_RSP,
+	MAX_FCOE_SQE_REQUEST_TYPE
+};
+
+
+/*
+ * FCoE task TX state
+ */
+enum fcoe_task_tx_state {
+	/* Initiate state after driver has initialized the task */
+	FCOE_TASK_TX_STATE_NORMAL,
+	/* Updated by TX path after complete transmitting unsolicited packet */
+	FCOE_TASK_TX_STATE_UNSOLICITED_COMPLETED,
+	/*
+	 * Updated by TX path after start processing the task requesting the
+	 * cleanup/abort operation
+	 */
+	FCOE_TASK_TX_STATE_CLEAN_REQ,
+	FCOE_TASK_TX_STATE_ABTS /* Updated by TX path during abort procedure */,
+	/* Updated by TX path during exchange cleanup procedure */
+	FCOE_TASK_TX_STATE_EXCLEANUP,
+	/*
+	 * Updated by TX path during exchange cleanup continuation task
+	 * procedure
+	 */
+	FCOE_TASK_TX_STATE_EXCLEANUP_TARGET_WRITE_CONT,
+	/* Updated by TX path during exchange cleanup first xfer procedure */
+	FCOE_TASK_TX_STATE_EXCLEANUP_TARGET_WRITE,
+	/* Updated by TX path during exchange cleanup read task in Target */
+	FCOE_TASK_TX_STATE_EXCLEANUP_TARGET_READ_OR_RSP,
+	/* Updated by TX path during target exchange cleanup procedure */
+	FCOE_TASK_TX_STATE_EXCLEANUP_TARGET_WRITE_LAST_CYCLE,
+	/* Updated by TX path during sequence recovery procedure */
+	FCOE_TASK_TX_STATE_SEQRECOVERY,
+	MAX_FCOE_TASK_TX_STATE
+};
+
+
+/*
+ * FCoE task type
+ */
+enum fcoe_task_type {
+	FCOE_TASK_TYPE_WRITE_INITIATOR,
+	FCOE_TASK_TYPE_READ_INITIATOR,
+	FCOE_TASK_TYPE_MIDPATH,
+	FCOE_TASK_TYPE_UNSOLICITED,
+	FCOE_TASK_TYPE_ABTS,
+	FCOE_TASK_TYPE_EXCHANGE_CLEANUP,
+	FCOE_TASK_TYPE_SEQUENCE_CLEANUP,
+	FCOE_TASK_TYPE_WRITE_TARGET,
+	FCOE_TASK_TYPE_READ_TARGET,
+	FCOE_TASK_TYPE_RSP,
+	FCOE_TASK_TYPE_RSP_SENSE_DATA,
+	FCOE_TASK_TYPE_ABTS_TARGET,
+	FCOE_TASK_TYPE_ENUM_SIZE,
+	MAX_FCOE_TASK_TYPE
+};
+
+struct scsi_glbl_queue_entry {
+	/* Start physical address for the RQ (receive queue) PBL. */
+	struct regpair rq_pbl_addr;
+	/* Start physical address for the CQ (completion queue) PBL. */
+	struct regpair cq_pbl_addr;
+	/* Start physical address for the CMDQ (command queue) PBL. */
+	struct regpair cmdq_pbl_addr;
+};
+
+#endif /* __QEDF_HSI__ */

drivers/scsi/qedf/qedf_io.c

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#include <linux/spinlock.h>
+#include <linux/vmalloc.h>
+#include "qedf.h"
+#include <scsi/scsi_tcq.h>
+
+void qedf_cmd_timer_set(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
+	unsigned int timer_msec)
+{
+	queue_delayed_work(qedf->timer_work_queue, &io_req->timeout_work,
+	    msecs_to_jiffies(timer_msec));
+}
+
+static void qedf_cmd_timeout(struct work_struct *work)
+{
+
+	struct qedf_ioreq *io_req =
+	    container_of(work, struct qedf_ioreq, timeout_work.work);
+	struct qedf_ctx *qedf = io_req->fcport->qedf;
+	struct qedf_rport *fcport = io_req->fcport;
+	u8 op = 0;
+
+	switch (io_req->cmd_type) {
+	case QEDF_ABTS:
+		QEDF_ERR((&qedf->dbg_ctx), "ABTS timeout, xid=0x%x.\n",
+		    io_req->xid);
+		/* Cleanup timed out ABTS */
+		qedf_initiate_cleanup(io_req, true);
+		complete(&io_req->abts_done);
+
+		/*
+		 * Need to call kref_put for reference taken when initiate_abts
+		 * was called since abts_compl won't be called now that we've
+		 * cleaned up the task.
+		 */
+		kref_put(&io_req->refcount, qedf_release_cmd);
+
+		/*
+		 * Now that the original I/O and the ABTS are complete see
+		 * if we need to reconnect to the target.
+		 */
+		qedf_restart_rport(fcport);
+		break;
+	case QEDF_ELS:
+		kref_get(&io_req->refcount);
+		/*
+		 * Don't attempt to clean an ELS timeout as any subseqeunt
+		 * ABTS or cleanup requests just hang.  For now just free
+		 * the resources of the original I/O and the RRQ
+		 */
+		QEDF_ERR(&(qedf->dbg_ctx), "ELS timeout, xid=0x%x.\n",
+			  io_req->xid);
+		io_req->event = QEDF_IOREQ_EV_ELS_TMO;
+		/* Call callback function to complete command */
+		if (io_req->cb_func && io_req->cb_arg) {
+			op = io_req->cb_arg->op;
+			io_req->cb_func(io_req->cb_arg);
+			io_req->cb_arg = NULL;
+		}
+		qedf_initiate_cleanup(io_req, true);
+		kref_put(&io_req->refcount, qedf_release_cmd);
+		break;
+	case QEDF_SEQ_CLEANUP:
+		QEDF_ERR(&(qedf->dbg_ctx), "Sequence cleanup timeout, "
+		    "xid=0x%x.\n", io_req->xid);
+		qedf_initiate_cleanup(io_req, true);
+		io_req->event = QEDF_IOREQ_EV_ELS_TMO;
+		qedf_process_seq_cleanup_compl(qedf, NULL, io_req);
+		break;
+	default:
+		break;
+	}
+}
+
+void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr)
+{
+	struct io_bdt *bdt_info;
+	struct qedf_ctx *qedf = cmgr->qedf;
+	size_t bd_tbl_sz;
+	u16 min_xid = QEDF_MIN_XID;
+	u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1);
+	int num_ios;
+	int i;
+	struct qedf_ioreq *io_req;
+
+	num_ios = max_xid - min_xid + 1;
+
+	/* Free fcoe_bdt_ctx structures */
+	if (!cmgr->io_bdt_pool)
+		goto free_cmd_pool;
+
+	bd_tbl_sz = QEDF_MAX_BDS_PER_CMD * sizeof(struct fcoe_sge);
+	for (i = 0; i < num_ios; i++) {
+		bdt_info = cmgr->io_bdt_pool[i];
+		if (bdt_info->bd_tbl) {
+			dma_free_coherent(&qedf->pdev->dev, bd_tbl_sz,
+			    bdt_info->bd_tbl, bdt_info->bd_tbl_dma);
+			bdt_info->bd_tbl = NULL;
+		}
+	}
+
+	/* Destroy io_bdt pool */
+	for (i = 0; i < num_ios; i++) {
+		kfree(cmgr->io_bdt_pool[i]);
+		cmgr->io_bdt_pool[i] = NULL;
+	}
+
+	kfree(cmgr->io_bdt_pool);
+	cmgr->io_bdt_pool = NULL;
+
+free_cmd_pool:
+
+	for (i = 0; i < num_ios; i++) {
+		io_req = &cmgr->cmds[i];
+		/* Make sure we free per command sense buffer */
+		if (io_req->sense_buffer)
+			dma_free_coherent(&qedf->pdev->dev,
+			    QEDF_SCSI_SENSE_BUFFERSIZE, io_req->sense_buffer,
+			    io_req->sense_buffer_dma);
+		cancel_delayed_work_sync(&io_req->rrq_work);
+	}
+
+	/* Free command manager itself */
+	vfree(cmgr);
+}
+
+static void qedf_handle_rrq(struct work_struct *work)
+{
+	struct qedf_ioreq *io_req =
+	    container_of(work, struct qedf_ioreq, rrq_work.work);
+
+	qedf_send_rrq(io_req);
+
+}
+
+struct qedf_cmd_mgr *qedf_cmd_mgr_alloc(struct qedf_ctx *qedf)
+{
+	struct qedf_cmd_mgr *cmgr;
+	struct io_bdt *bdt_info;
+	struct qedf_ioreq *io_req;
+	u16 xid;
+	int i;
+	int num_ios;
+	u16 min_xid = QEDF_MIN_XID;
+	u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1);
+
+	/* Make sure num_queues is already set before calling this function */
+	if (!qedf->num_queues) {
+		QEDF_ERR(&(qedf->dbg_ctx), "num_queues is not set.\n");
+		return NULL;
+	}
+
+	if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Invalid min_xid 0x%x and "
+			   "max_xid 0x%x.\n", min_xid, max_xid);
+		return NULL;
+	}
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "min xid 0x%x, max xid "
+		   "0x%x.\n", min_xid, max_xid);
+
+	num_ios = max_xid - min_xid + 1;
+
+	cmgr = vzalloc(sizeof(struct qedf_cmd_mgr));
+	if (!cmgr) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc cmd mgr.\n");
+		return NULL;
+	}
+
+	cmgr->qedf = qedf;
+	spin_lock_init(&cmgr->lock);
+
+	/*
+	 * Initialize list of qedf_ioreq.
+	 */
+	xid = QEDF_MIN_XID;
+
+	for (i = 0; i < num_ios; i++) {
+		io_req = &cmgr->cmds[i];
+		INIT_DELAYED_WORK(&io_req->timeout_work, qedf_cmd_timeout);
+
+		io_req->xid = xid++;
+
+		INIT_DELAYED_WORK(&io_req->rrq_work, qedf_handle_rrq);
+
+		/* Allocate DMA memory to hold sense buffer */
+		io_req->sense_buffer = dma_alloc_coherent(&qedf->pdev->dev,
+		    QEDF_SCSI_SENSE_BUFFERSIZE, &io_req->sense_buffer_dma,
+		    GFP_KERNEL);
+		if (!io_req->sense_buffer)
+			goto mem_err;
+	}
+
+	/* Allocate pool of io_bdts - one for each qedf_ioreq */
+	cmgr->io_bdt_pool = kmalloc_array(num_ios, sizeof(struct io_bdt *),
+	    GFP_KERNEL);
+
+	if (!cmgr->io_bdt_pool) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc io_bdt_pool.\n");
+		goto mem_err;
+	}
+
+	for (i = 0; i < num_ios; i++) {
+		cmgr->io_bdt_pool[i] = kmalloc(sizeof(struct io_bdt),
+		    GFP_KERNEL);
+		if (!cmgr->io_bdt_pool[i]) {
+			QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc "
+				   "io_bdt_pool[%d].\n", i);
+			goto mem_err;
+		}
+	}
+
+	for (i = 0; i < num_ios; i++) {
+		bdt_info = cmgr->io_bdt_pool[i];
+		bdt_info->bd_tbl = dma_alloc_coherent(&qedf->pdev->dev,
+		    QEDF_MAX_BDS_PER_CMD * sizeof(struct fcoe_sge),
+		    &bdt_info->bd_tbl_dma, GFP_KERNEL);
+		if (!bdt_info->bd_tbl) {
+			QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc "
+				   "bdt_tbl[%d].\n", i);
+			goto mem_err;
+		}
+	}
+	atomic_set(&cmgr->free_list_cnt, num_ios);
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+	    "cmgr->free_list_cnt=%d.\n",
+	    atomic_read(&cmgr->free_list_cnt));
+
+	return cmgr;
+
+mem_err:
+	qedf_cmd_mgr_free(cmgr);
+	return NULL;
+}
+
+struct qedf_ioreq *qedf_alloc_cmd(struct qedf_rport *fcport, u8 cmd_type)
+{
+	struct qedf_ctx *qedf = fcport->qedf;
+	struct qedf_cmd_mgr *cmd_mgr = qedf->cmd_mgr;
+	struct qedf_ioreq *io_req = NULL;
+	struct io_bdt *bd_tbl;
+	u16 xid;
+	uint32_t free_sqes;
+	int i;
+	unsigned long flags;
+
+	free_sqes = atomic_read(&fcport->free_sqes);
+
+	if (!free_sqes) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Returning NULL, free_sqes=%d.\n ",
+		    free_sqes);
+		goto out_failed;
+	}
+
+	/* Limit the number of outstanding R/W tasks */
+	if ((atomic_read(&fcport->num_active_ios) >=
+	    NUM_RW_TASKS_PER_CONNECTION)) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Returning NULL, num_active_ios=%d.\n",
+		    atomic_read(&fcport->num_active_ios));
+		goto out_failed;
+	}
+
+	/* Limit global TIDs certain tasks */
+	if (atomic_read(&cmd_mgr->free_list_cnt) <= GBL_RSVD_TASKS) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Returning NULL, free_list_cnt=%d.\n",
+		    atomic_read(&cmd_mgr->free_list_cnt));
+		goto out_failed;
+	}
+
+	spin_lock_irqsave(&cmd_mgr->lock, flags);
+	for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) {
+		io_req = &cmd_mgr->cmds[cmd_mgr->idx];
+		cmd_mgr->idx++;
+		if (cmd_mgr->idx == FCOE_PARAMS_NUM_TASKS)
+			cmd_mgr->idx = 0;
+
+		/* Check to make sure command was previously freed */
+		if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags))
+			break;
+	}
+
+	if (i == FCOE_PARAMS_NUM_TASKS) {
+		spin_unlock_irqrestore(&cmd_mgr->lock, flags);
+		goto out_failed;
+	}
+
+	set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
+	spin_unlock_irqrestore(&cmd_mgr->lock, flags);
+
+	atomic_inc(&fcport->num_active_ios);
+	atomic_dec(&fcport->free_sqes);
+	xid = io_req->xid;
+	atomic_dec(&cmd_mgr->free_list_cnt);
+
+	io_req->cmd_mgr = cmd_mgr;
+	io_req->fcport = fcport;
+
+	/* Hold the io_req against deletion */
+	kref_init(&io_req->refcount);
+
+	/* Bind io_bdt for this io_req */
+	/* Have a static link between io_req and io_bdt_pool */
+	bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
+	if (bd_tbl == NULL) {
+		QEDF_ERR(&(qedf->dbg_ctx), "bd_tbl is NULL, xid=%x.\n", xid);
+		kref_put(&io_req->refcount, qedf_release_cmd);
+		goto out_failed;
+	}
+	bd_tbl->io_req = io_req;
+	io_req->cmd_type = cmd_type;
+
+	/* Reset sequence offset data */
+	io_req->rx_buf_off = 0;
+	io_req->tx_buf_off = 0;
+	io_req->rx_id = 0xffff; /* No OX_ID */
+
+	return io_req;
+
+out_failed:
+	/* Record failure for stats and return NULL to caller */
+	qedf->alloc_failures++;
+	return NULL;
+}
+
+static void qedf_free_mp_resc(struct qedf_ioreq *io_req)
+{
+	struct qedf_mp_req *mp_req = &(io_req->mp_req);
+	struct qedf_ctx *qedf = io_req->fcport->qedf;
+	uint64_t sz = sizeof(struct fcoe_sge);
+
+	/* clear tm flags */
+	mp_req->tm_flags = 0;
+	if (mp_req->mp_req_bd) {
+		dma_free_coherent(&qedf->pdev->dev, sz,
+		    mp_req->mp_req_bd, mp_req->mp_req_bd_dma);
+		mp_req->mp_req_bd = NULL;
+	}
+	if (mp_req->mp_resp_bd) {
+		dma_free_coherent(&qedf->pdev->dev, sz,
+		    mp_req->mp_resp_bd, mp_req->mp_resp_bd_dma);
+		mp_req->mp_resp_bd = NULL;
+	}
+	if (mp_req->req_buf) {
+		dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
+		    mp_req->req_buf, mp_req->req_buf_dma);
+		mp_req->req_buf = NULL;
+	}
+	if (mp_req->resp_buf) {
+		dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
+		    mp_req->resp_buf, mp_req->resp_buf_dma);
+		mp_req->resp_buf = NULL;
+	}
+}
+
+void qedf_release_cmd(struct kref *ref)
+{
+	struct qedf_ioreq *io_req =
+	    container_of(ref, struct qedf_ioreq, refcount);
+	struct qedf_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
+	struct qedf_rport *fcport = io_req->fcport;
+
+	if (io_req->cmd_type == QEDF_ELS ||
+	    io_req->cmd_type == QEDF_TASK_MGMT_CMD)
+		qedf_free_mp_resc(io_req);
+
+	atomic_inc(&cmd_mgr->free_list_cnt);
+	atomic_dec(&fcport->num_active_ios);
+	if (atomic_read(&fcport->num_active_ios) < 0)
+		QEDF_WARN(&(fcport->qedf->dbg_ctx), "active_ios < 0.\n");
+
+	/* Increment task retry identifier now that the request is released */
+	io_req->task_retry_identifier++;
+
+	clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
+}
+
+static int qedf_split_bd(struct qedf_ioreq *io_req, u64 addr, int sg_len,
+	int bd_index)
+{
+	struct fcoe_sge *bd = io_req->bd_tbl->bd_tbl;
+	int frag_size, sg_frags;
+
+	sg_frags = 0;
+	while (sg_len) {
+		if (sg_len > QEDF_BD_SPLIT_SZ)
+			frag_size = QEDF_BD_SPLIT_SZ;
+		else
+			frag_size = sg_len;
+		bd[bd_index + sg_frags].sge_addr.lo = U64_LO(addr);
+		bd[bd_index + sg_frags].sge_addr.hi = U64_HI(addr);
+		bd[bd_index + sg_frags].size = (uint16_t)frag_size;
+
+		addr += (u64)frag_size;
+		sg_frags++;
+		sg_len -= frag_size;
+	}
+	return sg_frags;
+}
+
+static int qedf_map_sg(struct qedf_ioreq *io_req)
+{
+	struct scsi_cmnd *sc = io_req->sc_cmd;
+	struct Scsi_Host *host = sc->device->host;
+	struct fc_lport *lport = shost_priv(host);
+	struct qedf_ctx *qedf = lport_priv(lport);
+	struct fcoe_sge *bd = io_req->bd_tbl->bd_tbl;
+	struct scatterlist *sg;
+	int byte_count = 0;
+	int sg_count = 0;
+	int bd_count = 0;
+	int sg_frags;
+	unsigned int sg_len;
+	u64 addr, end_addr;
+	int i;
+
+	sg_count = dma_map_sg(&qedf->pdev->dev, scsi_sglist(sc),
+	    scsi_sg_count(sc), sc->sc_data_direction);
+
+	sg = scsi_sglist(sc);
+
+	/*
+	 * New condition to send single SGE as cached-SGL with length less
+	 * than 64k.
+	 */
+	if ((sg_count == 1) && (sg_dma_len(sg) <=
+	    QEDF_MAX_SGLEN_FOR_CACHESGL)) {
+		sg_len = sg_dma_len(sg);
+		addr = (u64)sg_dma_address(sg);
+
+		bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
+		bd[bd_count].sge_addr.hi = (addr >> 32);
+		bd[bd_count].size = (u16)sg_len;
+
+		return ++bd_count;
+	}
+
+	scsi_for_each_sg(sc, sg, sg_count, i) {
+		sg_len = sg_dma_len(sg);
+		addr = (u64)sg_dma_address(sg);
+		end_addr = (u64)(addr + sg_len);
+
+		/*
+		 * First s/g element in the list so check if the end_addr
+		 * is paged aligned. Also check to make sure the length is
+		 * at least page size.
+		 */
+		if ((i == 0) && (sg_count > 1) &&
+		    ((end_addr % QEDF_PAGE_SIZE) ||
+		    sg_len < QEDF_PAGE_SIZE))
+			io_req->use_slowpath = true;
+		/*
+		 * Last s/g element so check if the start address is paged
+		 * aligned.
+		 */
+		else if ((i == (sg_count - 1)) && (sg_count > 1) &&
+		    (addr % QEDF_PAGE_SIZE))
+			io_req->use_slowpath = true;
+		/*
+		 * Intermediate s/g element so check if start and end address
+		 * is page aligned.
+		 */
+		else if ((i != 0) && (i != (sg_count - 1)) &&
+		    ((addr % QEDF_PAGE_SIZE) || (end_addr % QEDF_PAGE_SIZE)))
+			io_req->use_slowpath = true;
+
+		if (sg_len > QEDF_MAX_BD_LEN) {
+			sg_frags = qedf_split_bd(io_req, addr, sg_len,
+			    bd_count);
+		} else {
+			sg_frags = 1;
+			bd[bd_count].sge_addr.lo = U64_LO(addr);
+			bd[bd_count].sge_addr.hi  = U64_HI(addr);
+			bd[bd_count].size = (uint16_t)sg_len;
+		}
+
+		bd_count += sg_frags;
+		byte_count += sg_len;
+	}
+
+	if (byte_count != scsi_bufflen(sc))
+		QEDF_ERR(&(qedf->dbg_ctx), "byte_count = %d != "
+			  "scsi_bufflen = %d, task_id = 0x%x.\n", byte_count,
+			   scsi_bufflen(sc), io_req->xid);
+
+	return bd_count;
+}
+
+static int qedf_build_bd_list_from_sg(struct qedf_ioreq *io_req)
+{
+	struct scsi_cmnd *sc = io_req->sc_cmd;
+	struct fcoe_sge *bd = io_req->bd_tbl->bd_tbl;
+	int bd_count;
+
+	if (scsi_sg_count(sc)) {
+		bd_count = qedf_map_sg(io_req);
+		if (bd_count == 0)
+			return -ENOMEM;
+	} else {
+		bd_count = 0;
+		bd[0].sge_addr.lo = bd[0].sge_addr.hi = 0;
+		bd[0].size = 0;
+	}
+	io_req->bd_tbl->bd_valid = bd_count;
+
+	return 0;
+}
+
+static void qedf_build_fcp_cmnd(struct qedf_ioreq *io_req,
+				  struct fcp_cmnd *fcp_cmnd)
+{
+	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+
+	/* fcp_cmnd is 32 bytes */
+	memset(fcp_cmnd, 0, FCP_CMND_LEN);
+
+	/* 8 bytes: SCSI LUN info */
+	int_to_scsilun(sc_cmd->device->lun,
+			(struct scsi_lun *)&fcp_cmnd->fc_lun);
+
+	/* 4 bytes: flag info */
+	fcp_cmnd->fc_pri_ta = 0;
+	fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
+	fcp_cmnd->fc_flags = io_req->io_req_flags;
+	fcp_cmnd->fc_cmdref = 0;
+
+	/* Populate data direction */
+	if (sc_cmd->sc_data_direction == DMA_TO_DEVICE)
+		fcp_cmnd->fc_flags |= FCP_CFL_WRDATA;
+	else if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE)
+		fcp_cmnd->fc_flags |= FCP_CFL_RDDATA;
+
+	fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
+
+	/* 16 bytes: CDB information */
+	memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
+
+	/* 4 bytes: FCP data length */
+	fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
+
+}
+
+static void  qedf_init_task(struct qedf_rport *fcport, struct fc_lport *lport,
+	struct qedf_ioreq *io_req, u32 *ptu_invalidate,
+	struct fcoe_task_context *task_ctx)
+{
+	enum fcoe_task_type task_type;
+	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+	struct io_bdt *bd_tbl = io_req->bd_tbl;
+	union fcoe_data_desc_ctx *data_desc;
+	u32 *fcp_cmnd;
+	u32 tmp_fcp_cmnd[8];
+	int cnt, i;
+	int bd_count;
+	struct qedf_ctx *qedf = fcport->qedf;
+	uint16_t cq_idx = smp_processor_id() % qedf->num_queues;
+	u8 tmp_sgl_mode = 0;
+	u8 mst_sgl_mode = 0;
+
+	memset(task_ctx, 0, sizeof(struct fcoe_task_context));
+	io_req->task = task_ctx;
+
+	if (sc_cmd->sc_data_direction == DMA_TO_DEVICE)
+		task_type = FCOE_TASK_TYPE_WRITE_INITIATOR;
+	else
+		task_type = FCOE_TASK_TYPE_READ_INITIATOR;
+
+	/* Y Storm context */
+	task_ctx->ystorm_st_context.expect_first_xfer = 1;
+	task_ctx->ystorm_st_context.data_2_trns_rem = io_req->data_xfer_len;
+	/* Check if this is required */
+	task_ctx->ystorm_st_context.ox_id = io_req->xid;
+	task_ctx->ystorm_st_context.task_rety_identifier =
+	    io_req->task_retry_identifier;
+
+	/* T Storm ag context */
+	SET_FIELD(task_ctx->tstorm_ag_context.flags0,
+	    TSTORM_FCOE_TASK_AG_CTX_CONNECTION_TYPE, PROTOCOLID_FCOE);
+	task_ctx->tstorm_ag_context.icid = (u16)fcport->fw_cid;
+
+	/* T Storm st context */
+	SET_FIELD(task_ctx->tstorm_st_context.read_write.flags,
+	    FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME,
+	    1);
+	task_ctx->tstorm_st_context.read_write.rx_id = 0xffff;
+
+	task_ctx->tstorm_st_context.read_only.dev_type =
+	    FCOE_TASK_DEV_TYPE_DISK;
+	task_ctx->tstorm_st_context.read_only.conf_supported = 0;
+	task_ctx->tstorm_st_context.read_only.cid = fcport->fw_cid;
+
+	/* Completion queue for response. */
+	task_ctx->tstorm_st_context.read_only.glbl_q_num = cq_idx;
+	task_ctx->tstorm_st_context.read_only.fcp_cmd_trns_size =
+	    io_req->data_xfer_len;
+	task_ctx->tstorm_st_context.read_write.e_d_tov_exp_timeout_val =
+	    lport->e_d_tov;
+
+	task_ctx->ustorm_ag_context.global_cq_num = cq_idx;
+	io_req->fp_idx = cq_idx;
+
+	bd_count = bd_tbl->bd_valid;
+	if (task_type == FCOE_TASK_TYPE_WRITE_INITIATOR) {
+		/* Setup WRITE task */
+		struct fcoe_sge *fcoe_bd_tbl = bd_tbl->bd_tbl;
+
+		task_ctx->ystorm_st_context.task_type =
+		    FCOE_TASK_TYPE_WRITE_INITIATOR;
+		data_desc = &task_ctx->ystorm_st_context.data_desc;
+
+		if (io_req->use_slowpath) {
+			SET_FIELD(task_ctx->ystorm_st_context.sgl_mode,
+			    YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
+			    FCOE_SLOW_SGL);
+			data_desc->slow.base_sgl_addr.lo =
+			    U64_LO(bd_tbl->bd_tbl_dma);
+			data_desc->slow.base_sgl_addr.hi =
+			    U64_HI(bd_tbl->bd_tbl_dma);
+			data_desc->slow.remainder_num_sges = bd_count;
+			data_desc->slow.curr_sge_off = 0;
+			data_desc->slow.curr_sgl_index = 0;
+			qedf->slow_sge_ios++;
+			io_req->sge_type = QEDF_IOREQ_SLOW_SGE;
+		} else {
+			SET_FIELD(task_ctx->ystorm_st_context.sgl_mode,
+			    YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
+			    (bd_count <= 4) ? (enum fcoe_sgl_mode)bd_count :
+			    FCOE_MUL_FAST_SGES);
+
+			if (bd_count == 1) {
+				data_desc->single_sge.sge_addr.lo =
+				    fcoe_bd_tbl->sge_addr.lo;
+				data_desc->single_sge.sge_addr.hi =
+				    fcoe_bd_tbl->sge_addr.hi;
+				data_desc->single_sge.size =
+				    fcoe_bd_tbl->size;
+				data_desc->single_sge.is_valid_sge = 0;
+				qedf->single_sge_ios++;
+				io_req->sge_type = QEDF_IOREQ_SINGLE_SGE;
+			} else {
+				data_desc->fast.sgl_start_addr.lo =
+				    U64_LO(bd_tbl->bd_tbl_dma);
+				data_desc->fast.sgl_start_addr.hi =
+				    U64_HI(bd_tbl->bd_tbl_dma);
+				data_desc->fast.sgl_byte_offset =
+				    data_desc->fast.sgl_start_addr.lo &
+				    (QEDF_PAGE_SIZE - 1);
+				if (data_desc->fast.sgl_byte_offset > 0)
+					QEDF_ERR(&(qedf->dbg_ctx),
+					    "byte_offset=%u for xid=0x%x.\n",
+					    io_req->xid,
+					    data_desc->fast.sgl_byte_offset);
+				data_desc->fast.task_reuse_cnt =
+				    io_req->reuse_count;
+				io_req->reuse_count++;
+				if (io_req->reuse_count == QEDF_MAX_REUSE) {
+					*ptu_invalidate = 1;
+					io_req->reuse_count = 0;
+				}
+				qedf->fast_sge_ios++;
+				io_req->sge_type = QEDF_IOREQ_FAST_SGE;
+			}
+		}
+
+		/* T Storm context */
+		task_ctx->tstorm_st_context.read_only.task_type =
+		    FCOE_TASK_TYPE_WRITE_INITIATOR;
+
+		/* M Storm context */
+		tmp_sgl_mode = GET_FIELD(task_ctx->ystorm_st_context.sgl_mode,
+		    YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE);
+		SET_FIELD(task_ctx->mstorm_st_context.non_fp.tx_rx_sgl_mode,
+		    FCOE_MSTORM_FCOE_TASK_ST_CTX_NON_FP_TX_SGL_MODE,
+		    tmp_sgl_mode);
+
+	} else {
+		/* Setup READ task */
+
+		/* M Storm context */
+		struct fcoe_sge *fcoe_bd_tbl = bd_tbl->bd_tbl;
+
+		data_desc = &task_ctx->mstorm_st_context.fp.data_desc;
+		task_ctx->mstorm_st_context.fp.data_2_trns_rem =
+		    io_req->data_xfer_len;
+
+		if (io_req->use_slowpath) {
+			SET_FIELD(
+			    task_ctx->mstorm_st_context.non_fp.tx_rx_sgl_mode,
+			    FCOE_MSTORM_FCOE_TASK_ST_CTX_NON_FP_RX_SGL_MODE,
+			    FCOE_SLOW_SGL);
+			data_desc->slow.base_sgl_addr.lo =
+			    U64_LO(bd_tbl->bd_tbl_dma);
+			data_desc->slow.base_sgl_addr.hi =
+			    U64_HI(bd_tbl->bd_tbl_dma);
+			data_desc->slow.remainder_num_sges =
+			    bd_count;
+			data_desc->slow.curr_sge_off = 0;
+			data_desc->slow.curr_sgl_index = 0;
+			qedf->slow_sge_ios++;
+			io_req->sge_type = QEDF_IOREQ_SLOW_SGE;
+		} else {
+			SET_FIELD(
+			    task_ctx->mstorm_st_context.non_fp.tx_rx_sgl_mode,
+			    FCOE_MSTORM_FCOE_TASK_ST_CTX_NON_FP_RX_SGL_MODE,
+			    (bd_count <= 4) ? (enum fcoe_sgl_mode)bd_count :
+			    FCOE_MUL_FAST_SGES);
+
+			if (bd_count == 1) {
+				data_desc->single_sge.sge_addr.lo =
+				    fcoe_bd_tbl->sge_addr.lo;
+				data_desc->single_sge.sge_addr.hi =
+				    fcoe_bd_tbl->sge_addr.hi;
+				data_desc->single_sge.size =
+				    fcoe_bd_tbl->size;
+				data_desc->single_sge.is_valid_sge = 0;
+				qedf->single_sge_ios++;
+				io_req->sge_type = QEDF_IOREQ_SINGLE_SGE;
+			} else {
+				data_desc->fast.sgl_start_addr.lo =
+				    U64_LO(bd_tbl->bd_tbl_dma);
+				data_desc->fast.sgl_start_addr.hi =
+				    U64_HI(bd_tbl->bd_tbl_dma);
+				data_desc->fast.sgl_byte_offset = 0;
+				data_desc->fast.task_reuse_cnt =
+				    io_req->reuse_count;
+				io_req->reuse_count++;
+				if (io_req->reuse_count == QEDF_MAX_REUSE) {
+					*ptu_invalidate = 1;
+					io_req->reuse_count = 0;
+				}
+				qedf->fast_sge_ios++;
+				io_req->sge_type = QEDF_IOREQ_FAST_SGE;
+			}
+		}
+
+		/* Y Storm context */
+		task_ctx->ystorm_st_context.expect_first_xfer = 0;
+		task_ctx->ystorm_st_context.task_type =
+		    FCOE_TASK_TYPE_READ_INITIATOR;
+
+		/* T Storm context */
+		task_ctx->tstorm_st_context.read_only.task_type =
+		    FCOE_TASK_TYPE_READ_INITIATOR;
+		mst_sgl_mode = GET_FIELD(
+		    task_ctx->mstorm_st_context.non_fp.tx_rx_sgl_mode,
+		    FCOE_MSTORM_FCOE_TASK_ST_CTX_NON_FP_RX_SGL_MODE);
+		SET_FIELD(task_ctx->tstorm_st_context.read_write.flags,
+		    FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_RX_SGL_MODE,
+		    mst_sgl_mode);
+	}
+
+	/* fill FCP_CMND IU */
+	fcp_cmnd = (u32 *)task_ctx->ystorm_st_context.tx_info_union.fcp_cmd_payload.opaque;
+	qedf_build_fcp_cmnd(io_req, (struct fcp_cmnd *)&tmp_fcp_cmnd);
+
+	/* Swap fcp_cmnd since FC is big endian */
+	cnt = sizeof(struct fcp_cmnd) / sizeof(u32);
+
+	for (i = 0; i < cnt; i++) {
+		*fcp_cmnd = cpu_to_be32(tmp_fcp_cmnd[i]);
+		fcp_cmnd++;
+	}
+
+	/* M Storm context - Sense buffer */
+	task_ctx->mstorm_st_context.non_fp.rsp_buf_addr.lo =
+		U64_LO(io_req->sense_buffer_dma);
+	task_ctx->mstorm_st_context.non_fp.rsp_buf_addr.hi =
+		U64_HI(io_req->sense_buffer_dma);
+}
+
+void qedf_init_mp_task(struct qedf_ioreq *io_req,
+	struct fcoe_task_context *task_ctx)
+{
+	struct qedf_mp_req *mp_req = &(io_req->mp_req);
+	struct qedf_rport *fcport = io_req->fcport;
+	struct qedf_ctx *qedf = io_req->fcport->qedf;
+	struct fc_frame_header *fc_hdr;
+	enum fcoe_task_type task_type = 0;
+	union fcoe_data_desc_ctx *data_desc;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Initializing MP task "
+		   "for cmd_type = %d\n", io_req->cmd_type);
+
+	qedf->control_requests++;
+
+	/* Obtain task_type */
+	if ((io_req->cmd_type == QEDF_TASK_MGMT_CMD) ||
+	    (io_req->cmd_type == QEDF_ELS)) {
+		task_type = FCOE_TASK_TYPE_MIDPATH;
+	} else if (io_req->cmd_type == QEDF_ABTS) {
+		task_type = FCOE_TASK_TYPE_ABTS;
+	}
+
+	memset(task_ctx, 0, sizeof(struct fcoe_task_context));
+
+	/* Setup the task from io_req for easy reference */
+	io_req->task = task_ctx;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "task type = %d\n",
+		   task_type);
+
+	/* YSTORM only */
+	{
+		/* Initialize YSTORM task context */
+		struct fcoe_tx_mid_path_params *task_fc_hdr =
+		    &task_ctx->ystorm_st_context.tx_info_union.tx_params.mid_path;
+		memset(task_fc_hdr, 0, sizeof(struct fcoe_tx_mid_path_params));
+		task_ctx->ystorm_st_context.task_rety_identifier =
+		    io_req->task_retry_identifier;
+
+		/* Init SGL parameters */
+		if ((task_type == FCOE_TASK_TYPE_MIDPATH) ||
+		    (task_type == FCOE_TASK_TYPE_UNSOLICITED)) {
+			data_desc = &task_ctx->ystorm_st_context.data_desc;
+			data_desc->slow.base_sgl_addr.lo =
+			    U64_LO(mp_req->mp_req_bd_dma);
+			data_desc->slow.base_sgl_addr.hi =
+			    U64_HI(mp_req->mp_req_bd_dma);
+			data_desc->slow.remainder_num_sges = 1;
+			data_desc->slow.curr_sge_off = 0;
+			data_desc->slow.curr_sgl_index = 0;
+		}
+
+		fc_hdr = &(mp_req->req_fc_hdr);
+		if (task_type == FCOE_TASK_TYPE_MIDPATH) {
+			fc_hdr->fh_ox_id = io_req->xid;
+			fc_hdr->fh_rx_id = htons(0xffff);
+		} else if (task_type == FCOE_TASK_TYPE_UNSOLICITED) {
+			fc_hdr->fh_rx_id = io_req->xid;
+		}
+
+		/* Fill FC Header into middle path buffer */
+		task_fc_hdr->parameter = fc_hdr->fh_parm_offset;
+		task_fc_hdr->r_ctl = fc_hdr->fh_r_ctl;
+		task_fc_hdr->type = fc_hdr->fh_type;
+		task_fc_hdr->cs_ctl = fc_hdr->fh_cs_ctl;
+		task_fc_hdr->df_ctl = fc_hdr->fh_df_ctl;
+		task_fc_hdr->rx_id = fc_hdr->fh_rx_id;
+		task_fc_hdr->ox_id = fc_hdr->fh_ox_id;
+
+		task_ctx->ystorm_st_context.data_2_trns_rem =
+		    io_req->data_xfer_len;
+		task_ctx->ystorm_st_context.task_type = task_type;
+	}
+
+	/* TSTORM ONLY */
+	{
+		task_ctx->tstorm_ag_context.icid = (u16)fcport->fw_cid;
+		task_ctx->tstorm_st_context.read_only.cid = fcport->fw_cid;
+		/* Always send middle-path repsonses on CQ #0 */
+		task_ctx->tstorm_st_context.read_only.glbl_q_num = 0;
+		io_req->fp_idx = 0;
+		SET_FIELD(task_ctx->tstorm_ag_context.flags0,
+		    TSTORM_FCOE_TASK_AG_CTX_CONNECTION_TYPE,
+		    PROTOCOLID_FCOE);
+		task_ctx->tstorm_st_context.read_only.task_type = task_type;
+		SET_FIELD(task_ctx->tstorm_st_context.read_write.flags,
+		    FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME,
+		    1);
+		task_ctx->tstorm_st_context.read_write.rx_id = 0xffff;
+	}
+
+	/* MSTORM only */
+	{
+		if (task_type == FCOE_TASK_TYPE_MIDPATH) {
+			/* Initialize task context */
+			data_desc = &task_ctx->mstorm_st_context.fp.data_desc;
+
+			/* Set cache sges address and length */
+			data_desc->slow.base_sgl_addr.lo =
+			    U64_LO(mp_req->mp_resp_bd_dma);
+			data_desc->slow.base_sgl_addr.hi =
+			    U64_HI(mp_req->mp_resp_bd_dma);
+			data_desc->slow.remainder_num_sges = 1;
+			data_desc->slow.curr_sge_off = 0;
+			data_desc->slow.curr_sgl_index = 0;
+
+			/*
+			 * Also need to fil in non-fastpath response address
+			 * for middle path commands.
+			 */
+			task_ctx->mstorm_st_context.non_fp.rsp_buf_addr.lo =
+			    U64_LO(mp_req->mp_resp_bd_dma);
+			task_ctx->mstorm_st_context.non_fp.rsp_buf_addr.hi =
+			    U64_HI(mp_req->mp_resp_bd_dma);
+		}
+	}
+
+	/* USTORM ONLY */
+	{
+		task_ctx->ustorm_ag_context.global_cq_num = 0;
+	}
+
+	/* I/O stats. Middle path commands always use slow SGEs */
+	qedf->slow_sge_ios++;
+	io_req->sge_type = QEDF_IOREQ_SLOW_SGE;
+}
+
+void qedf_add_to_sq(struct qedf_rport *fcport, u16 xid, u32 ptu_invalidate,
+	enum fcoe_task_type req_type, u32 offset)
+{
+	struct fcoe_wqe *sqe;
+	uint16_t total_sqe = (fcport->sq_mem_size)/(sizeof(struct fcoe_wqe));
+
+	sqe = &fcport->sq[fcport->sq_prod_idx];
+
+	fcport->sq_prod_idx++;
+	fcport->fw_sq_prod_idx++;
+	if (fcport->sq_prod_idx == total_sqe)
+		fcport->sq_prod_idx = 0;
+
+	switch (req_type) {
+	case FCOE_TASK_TYPE_WRITE_INITIATOR:
+	case FCOE_TASK_TYPE_READ_INITIATOR:
+		SET_FIELD(sqe->flags, FCOE_WQE_REQ_TYPE, SEND_FCOE_CMD);
+		if (ptu_invalidate)
+			SET_FIELD(sqe->flags, FCOE_WQE_INVALIDATE_PTU, 1);
+		break;
+	case FCOE_TASK_TYPE_MIDPATH:
+		SET_FIELD(sqe->flags, FCOE_WQE_REQ_TYPE, SEND_FCOE_MIDPATH);
+		break;
+	case FCOE_TASK_TYPE_ABTS:
+		SET_FIELD(sqe->flags, FCOE_WQE_REQ_TYPE,
+		    SEND_FCOE_ABTS_REQUEST);
+		break;
+	case FCOE_TASK_TYPE_EXCHANGE_CLEANUP:
+		SET_FIELD(sqe->flags, FCOE_WQE_REQ_TYPE,
+		     FCOE_EXCHANGE_CLEANUP);
+		break;
+	case FCOE_TASK_TYPE_SEQUENCE_CLEANUP:
+		SET_FIELD(sqe->flags, FCOE_WQE_REQ_TYPE,
+		    FCOE_SEQUENCE_RECOVERY);
+		/* NOTE: offset param only used for sequence recovery */
+		sqe->additional_info_union.seq_rec_updated_offset = offset;
+		break;
+	case FCOE_TASK_TYPE_UNSOLICITED:
+		break;
+	default:
+		break;
+	}
+
+	sqe->task_id = xid;
+
+	/* Make sure SQ data is coherent */
+	wmb();
+
+}
+
+void qedf_ring_doorbell(struct qedf_rport *fcport)
+{
+	struct fcoe_db_data dbell = { 0 };
+
+	dbell.agg_flags = 0;
+
+	dbell.params |= DB_DEST_XCM << FCOE_DB_DATA_DEST_SHIFT;
+	dbell.params |= DB_AGG_CMD_SET << FCOE_DB_DATA_AGG_CMD_SHIFT;
+	dbell.params |= DQ_XCM_FCOE_SQ_PROD_CMD <<
+	    FCOE_DB_DATA_AGG_VAL_SEL_SHIFT;
+
+	dbell.sq_prod = fcport->fw_sq_prod_idx;
+	writel(*(u32 *)&dbell, fcport->p_doorbell);
+	/* Make sure SQ index is updated so f/w prcesses requests in order */
+	wmb();
+	mmiowb();
+}
+
+static void qedf_trace_io(struct qedf_rport *fcport, struct qedf_ioreq *io_req,
+			  int8_t direction)
+{
+	struct qedf_ctx *qedf = fcport->qedf;
+	struct qedf_io_log *io_log;
+	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+	unsigned long flags;
+	uint8_t op;
+
+	spin_lock_irqsave(&qedf->io_trace_lock, flags);
+
+	io_log = &qedf->io_trace_buf[qedf->io_trace_idx];
+	io_log->direction = direction;
+	io_log->task_id = io_req->xid;
+	io_log->port_id = fcport->rdata->ids.port_id;
+	io_log->lun = sc_cmd->device->lun;
+	io_log->op = op = sc_cmd->cmnd[0];
+	io_log->lba[0] = sc_cmd->cmnd[2];
+	io_log->lba[1] = sc_cmd->cmnd[3];
+	io_log->lba[2] = sc_cmd->cmnd[4];
+	io_log->lba[3] = sc_cmd->cmnd[5];
+	io_log->bufflen = scsi_bufflen(sc_cmd);
+	io_log->sg_count = scsi_sg_count(sc_cmd);
+	io_log->result = sc_cmd->result;
+	io_log->jiffies = jiffies;
+	io_log->refcount = atomic_read(&io_req->refcount.refcount);
+
+	if (direction == QEDF_IO_TRACE_REQ) {
+		/* For requests we only care abot the submission CPU */
+		io_log->req_cpu = io_req->cpu;
+		io_log->int_cpu = 0;
+		io_log->rsp_cpu = 0;
+	} else if (direction == QEDF_IO_TRACE_RSP) {
+		io_log->req_cpu = io_req->cpu;
+		io_log->int_cpu = io_req->int_cpu;
+		io_log->rsp_cpu = smp_processor_id();
+	}
+
+	io_log->sge_type = io_req->sge_type;
+
+	qedf->io_trace_idx++;
+	if (qedf->io_trace_idx == QEDF_IO_TRACE_SIZE)
+		qedf->io_trace_idx = 0;
+
+	spin_unlock_irqrestore(&qedf->io_trace_lock, flags);
+}
+
+int qedf_post_io_req(struct qedf_rport *fcport, struct qedf_ioreq *io_req)
+{
+	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+	struct Scsi_Host *host = sc_cmd->device->host;
+	struct fc_lport *lport = shost_priv(host);
+	struct qedf_ctx *qedf = lport_priv(lport);
+	struct fcoe_task_context *task_ctx;
+	u16 xid;
+	enum fcoe_task_type req_type = 0;
+	u32 ptu_invalidate = 0;
+
+	/* Initialize rest of io_req fileds */
+	io_req->data_xfer_len = scsi_bufflen(sc_cmd);
+	sc_cmd->SCp.ptr = (char *)io_req;
+	io_req->use_slowpath = false; /* Assume fast SGL by default */
+
+	/* Record which cpu this request is associated with */
+	io_req->cpu = smp_processor_id();
+
+	if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
+		req_type = FCOE_TASK_TYPE_READ_INITIATOR;
+		io_req->io_req_flags = QEDF_READ;
+		qedf->input_requests++;
+	} else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
+		req_type = FCOE_TASK_TYPE_WRITE_INITIATOR;
+		io_req->io_req_flags = QEDF_WRITE;
+		qedf->output_requests++;
+	} else {
+		io_req->io_req_flags = 0;
+		qedf->control_requests++;
+	}
+
+	xid = io_req->xid;
+
+	/* Build buffer descriptor list for firmware from sg list */
+	if (qedf_build_bd_list_from_sg(io_req)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "BD list creation failed.\n");
+		kref_put(&io_req->refcount, qedf_release_cmd);
+		return -EAGAIN;
+	}
+
+	/* Get the task context */
+	task_ctx = qedf_get_task_mem(&qedf->tasks, xid);
+	if (!task_ctx) {
+		QEDF_WARN(&(qedf->dbg_ctx), "task_ctx is NULL, xid=%d.\n",
+			   xid);
+		kref_put(&io_req->refcount, qedf_release_cmd);
+		return -EINVAL;
+	}
+
+	qedf_init_task(fcport, lport, io_req, &ptu_invalidate, task_ctx);
+
+	if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n");
+		kref_put(&io_req->refcount, qedf_release_cmd);
+	}
+
+	/* Obtain free SQ entry */
+	qedf_add_to_sq(fcport, xid, ptu_invalidate, req_type, 0);
+
+	/* Ring doorbell */
+	qedf_ring_doorbell(fcport);
+
+	if (qedf_io_tracing && io_req->sc_cmd)
+		qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_REQ);
+
+	return false;
+}
+
+int
+qedf_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd)
+{
+	struct fc_lport *lport = shost_priv(host);
+	struct qedf_ctx *qedf = lport_priv(lport);
+	struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
+	struct fc_rport_libfc_priv *rp = rport->dd_data;
+	struct qedf_rport *fcport = rport->dd_data;
+	struct qedf_ioreq *io_req;
+	int rc = 0;
+	int rval;
+	unsigned long flags = 0;
+
+
+	if (test_bit(QEDF_UNLOADING, &qedf->flags) ||
+	    test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) {
+		sc_cmd->result = DID_NO_CONNECT << 16;
+		sc_cmd->scsi_done(sc_cmd);
+		return 0;
+	}
+
+	rval = fc_remote_port_chkready(rport);
+	if (rval) {
+		sc_cmd->result = rval;
+		sc_cmd->scsi_done(sc_cmd);
+		return 0;
+	}
+
+	/* Retry command if we are doing a qed drain operation */
+	if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) {
+		rc = SCSI_MLQUEUE_HOST_BUSY;
+		goto exit_qcmd;
+	}
+
+	if (lport->state != LPORT_ST_READY ||
+	    atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
+		rc = SCSI_MLQUEUE_HOST_BUSY;
+		goto exit_qcmd;
+	}
+
+	/* rport and tgt are allocated together, so tgt should be non-NULL */
+	fcport = (struct qedf_rport *)&rp[1];
+
+	if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
+		/*
+		 * Session is not offloaded yet. Let SCSI-ml retry
+		 * the command.
+		 */
+		rc = SCSI_MLQUEUE_TARGET_BUSY;
+		goto exit_qcmd;
+	}
+	if (fcport->retry_delay_timestamp) {
+		if (time_after(jiffies, fcport->retry_delay_timestamp)) {
+			fcport->retry_delay_timestamp = 0;
+		} else {
+			/* If retry_delay timer is active, flow off the ML */
+			rc = SCSI_MLQUEUE_TARGET_BUSY;
+			goto exit_qcmd;
+		}
+	}
+
+	io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD);
+	if (!io_req) {
+		rc = SCSI_MLQUEUE_HOST_BUSY;
+		goto exit_qcmd;
+	}
+
+	io_req->sc_cmd = sc_cmd;
+
+	/* Take fcport->rport_lock for posting to fcport send queue */
+	spin_lock_irqsave(&fcport->rport_lock, flags);
+	if (qedf_post_io_req(fcport, io_req)) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Unable to post io_req\n");
+		/* Return SQE to pool */
+		atomic_inc(&fcport->free_sqes);
+		rc = SCSI_MLQUEUE_HOST_BUSY;
+	}
+	spin_unlock_irqrestore(&fcport->rport_lock, flags);
+
+exit_qcmd:
+	return rc;
+}
+
+static void qedf_parse_fcp_rsp(struct qedf_ioreq *io_req,
+				 struct fcoe_cqe_rsp_info *fcp_rsp)
+{
+	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+	struct qedf_ctx *qedf = io_req->fcport->qedf;
+	u8 rsp_flags = fcp_rsp->rsp_flags.flags;
+	int fcp_sns_len = 0;
+	int fcp_rsp_len = 0;
+	uint8_t *rsp_info, *sense_data;
+
+	io_req->fcp_status = FC_GOOD;
+	io_req->fcp_resid = 0;
+	if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER |
+	    FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER))
+		io_req->fcp_resid = fcp_rsp->fcp_resid;
+
+	io_req->scsi_comp_flags = rsp_flags;
+	CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
+	    fcp_rsp->scsi_status_code;
+
+	if (rsp_flags &
+	    FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID)
+		fcp_rsp_len = fcp_rsp->fcp_rsp_len;
+
+	if (rsp_flags &
+	    FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID)
+		fcp_sns_len = fcp_rsp->fcp_sns_len;
+
+	io_req->fcp_rsp_len = fcp_rsp_len;
+	io_req->fcp_sns_len = fcp_sns_len;
+	rsp_info = sense_data = io_req->sense_buffer;
+
+	/* fetch fcp_rsp_code */
+	if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
+		/* Only for task management function */
+		io_req->fcp_rsp_code = rsp_info[3];
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "fcp_rsp_code = %d\n", io_req->fcp_rsp_code);
+		/* Adjust sense-data location. */
+		sense_data += fcp_rsp_len;
+	}
+
+	if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Truncating sense buffer\n");
+		fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
+	}
+
+	memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
+	if (fcp_sns_len)
+		memcpy(sc_cmd->sense_buffer, sense_data,
+		    fcp_sns_len);
+}
+
+static void qedf_unmap_sg_list(struct qedf_ctx *qedf, struct qedf_ioreq *io_req)
+{
+	struct scsi_cmnd *sc = io_req->sc_cmd;
+
+	if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) {
+		dma_unmap_sg(&qedf->pdev->dev, scsi_sglist(sc),
+		    scsi_sg_count(sc), sc->sc_data_direction);
+		io_req->bd_tbl->bd_valid = 0;
+	}
+}
+
+void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *io_req)
+{
+	u16 xid, rval;
+	struct fcoe_task_context *task_ctx;
+	struct scsi_cmnd *sc_cmd;
+	struct fcoe_cqe_rsp_info *fcp_rsp;
+	struct qedf_rport *fcport;
+	int refcount;
+	u16 scope, qualifier = 0;
+	u8 fw_residual_flag = 0;
+
+	if (!io_req)
+		return;
+	if (!cqe)
+		return;
+
+	xid = io_req->xid;
+	task_ctx = qedf_get_task_mem(&qedf->tasks, xid);
+	sc_cmd = io_req->sc_cmd;
+	fcp_rsp = &cqe->cqe_info.rsp_info;
+
+	if (!sc_cmd) {
+		QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n");
+		return;
+	}
+
+	if (!sc_cmd->SCp.ptr) {
+		QEDF_WARN(&(qedf->dbg_ctx), "SCp.ptr is NULL, returned in "
+		    "another context.\n");
+		return;
+	}
+
+	if (!sc_cmd->request) {
+		QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd->request is NULL, "
+		    "sc_cmd=%p.\n", sc_cmd);
+		return;
+	}
+
+	if (!sc_cmd->request->special) {
+		QEDF_WARN(&(qedf->dbg_ctx), "request->special is NULL so "
+		    "request not valid, sc_cmd=%p.\n", sc_cmd);
+		return;
+	}
+
+	if (!sc_cmd->request->q) {
+		QEDF_WARN(&(qedf->dbg_ctx), "request->q is NULL so request "
+		   "is not valid, sc_cmd=%p.\n", sc_cmd);
+		return;
+	}
+
+	fcport = io_req->fcport;
+
+	qedf_parse_fcp_rsp(io_req, fcp_rsp);
+
+	qedf_unmap_sg_list(qedf, io_req);
+
+	/* Check for FCP transport error */
+	if (io_req->fcp_rsp_len > 3 && io_req->fcp_rsp_code) {
+		QEDF_ERR(&(qedf->dbg_ctx),
+		    "FCP I/O protocol failure xid=0x%x fcp_rsp_len=%d "
+		    "fcp_rsp_code=%d.\n", io_req->xid, io_req->fcp_rsp_len,
+		    io_req->fcp_rsp_code);
+		sc_cmd->result = DID_BUS_BUSY << 16;
+		goto out;
+	}
+
+	fw_residual_flag = GET_FIELD(cqe->cqe_info.rsp_info.fw_error_flags,
+	    FCOE_CQE_RSP_INFO_FW_UNDERRUN);
+	if (fw_residual_flag) {
+		QEDF_ERR(&(qedf->dbg_ctx),
+		    "Firmware detected underrun: xid=0x%x fcp_rsp.flags=0x%02x "
+		    "fcp_resid=%d fw_residual=0x%x.\n", io_req->xid,
+		    fcp_rsp->rsp_flags.flags, io_req->fcp_resid,
+		    cqe->cqe_info.rsp_info.fw_residual);
+
+		if (io_req->cdb_status == 0)
+			sc_cmd->result = (DID_ERROR << 16) | io_req->cdb_status;
+		else
+			sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
+
+		/* Abort the command since we did not get all the data */
+		init_completion(&io_req->abts_done);
+		rval = qedf_initiate_abts(io_req, true);
+		if (rval) {
+			QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
+			sc_cmd->result = (DID_ERROR << 16) | io_req->cdb_status;
+		}
+
+		/*
+		 * Set resid to the whole buffer length so we won't try to resue
+		 * any previously data.
+		 */
+		scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
+		goto out;
+	}
+
+	switch (io_req->fcp_status) {
+	case FC_GOOD:
+		if (io_req->cdb_status == 0) {
+			/* Good I/O completion */
+			sc_cmd->result = DID_OK << 16;
+		} else {
+			refcount = atomic_read(&io_req->refcount.refcount);
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+			    "%d:0:%d:%d xid=0x%0x op=0x%02x "
+			    "lba=%02x%02x%02x%02x cdb_status=%d "
+			    "fcp_resid=0x%x refcount=%d.\n",
+			    qedf->lport->host->host_no, sc_cmd->device->id,
+			    sc_cmd->device->lun, io_req->xid,
+			    sc_cmd->cmnd[0], sc_cmd->cmnd[2], sc_cmd->cmnd[3],
+			    sc_cmd->cmnd[4], sc_cmd->cmnd[5],
+			    io_req->cdb_status, io_req->fcp_resid,
+			    refcount);
+			sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
+
+			if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL ||
+			    io_req->cdb_status == SAM_STAT_BUSY) {
+				/*
+				 * Check whether we need to set retry_delay at
+				 * all based on retry_delay module parameter
+				 * and the status qualifier.
+				 */
+
+				/* Upper 2 bits */
+				scope = fcp_rsp->retry_delay_timer & 0xC000;
+				/* Lower 14 bits */
+				qualifier = fcp_rsp->retry_delay_timer & 0x3FFF;
+
+				if (qedf_retry_delay &&
+				    scope > 0 && qualifier > 0 &&
+				    qualifier <= 0x3FEF) {
+					/* Check we don't go over the max */
+					if (qualifier > QEDF_RETRY_DELAY_MAX)
+						qualifier =
+						    QEDF_RETRY_DELAY_MAX;
+					fcport->retry_delay_timestamp =
+					    jiffies + (qualifier * HZ / 10);
+				}
+			}
+		}
+		if (io_req->fcp_resid)
+			scsi_set_resid(sc_cmd, io_req->fcp_resid);
+		break;
+	default:
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "fcp_status=%d.\n",
+			   io_req->fcp_status);
+		break;
+	}
+
+out:
+	if (qedf_io_tracing)
+		qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_RSP);
+
+	io_req->sc_cmd = NULL;
+	sc_cmd->SCp.ptr =  NULL;
+	sc_cmd->scsi_done(sc_cmd);
+	kref_put(&io_req->refcount, qedf_release_cmd);
+}
+
+/* Return a SCSI command in some other context besides a normal completion */
+void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
+	int result)
+{
+	u16 xid;
+	struct scsi_cmnd *sc_cmd;
+	int refcount;
+
+	if (!io_req)
+		return;
+
+	xid = io_req->xid;
+	sc_cmd = io_req->sc_cmd;
+
+	if (!sc_cmd) {
+		QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n");
+		return;
+	}
+
+	if (!sc_cmd->SCp.ptr) {
+		QEDF_WARN(&(qedf->dbg_ctx), "SCp.ptr is NULL, returned in "
+		    "another context.\n");
+		return;
+	}
+
+	qedf_unmap_sg_list(qedf, io_req);
+
+	sc_cmd->result = result << 16;
+	refcount = atomic_read(&io_req->refcount.refcount);
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "%d:0:%d:%d: Completing "
+	    "sc_cmd=%p result=0x%08x op=0x%02x lba=0x%02x%02x%02x%02x, "
+	    "allowed=%d retries=%d refcount=%d.\n",
+	    qedf->lport->host->host_no, sc_cmd->device->id,
+	    sc_cmd->device->lun, sc_cmd, sc_cmd->result, sc_cmd->cmnd[0],
+	    sc_cmd->cmnd[2], sc_cmd->cmnd[3], sc_cmd->cmnd[4],
+	    sc_cmd->cmnd[5], sc_cmd->allowed, sc_cmd->retries,
+	    refcount);
+
+	/*
+	 * Set resid to the whole buffer length so we won't try to resue any
+	 * previously read data
+	 */
+	scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
+
+	if (qedf_io_tracing)
+		qedf_trace_io(io_req->fcport, io_req, QEDF_IO_TRACE_RSP);
+
+	io_req->sc_cmd = NULL;
+	sc_cmd->SCp.ptr = NULL;
+	sc_cmd->scsi_done(sc_cmd);
+	kref_put(&io_req->refcount, qedf_release_cmd);
+}
+
+/*
+ * Handle warning type CQE completions. This is mainly used for REC timer
+ * popping.
+ */
+void qedf_process_warning_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *io_req)
+{
+	int rval, i;
+	struct qedf_rport *fcport = io_req->fcport;
+	u64 err_warn_bit_map;
+	u8 err_warn = 0xff;
+
+	if (!cqe)
+		return;
+
+	QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Warning CQE, "
+		  "xid=0x%x\n", io_req->xid);
+	QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx),
+		  "err_warn_bitmap=%08x:%08x\n",
+		  le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi),
+		  le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo));
+	QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, "
+		  "rx_buff_off=%08x, rx_id=%04x\n",
+		  le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off),
+		  le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off),
+		  le32_to_cpu(cqe->cqe_info.err_info.rx_id));
+
+	/* Normalize the error bitmap value to an just an unsigned int */
+	err_warn_bit_map = (u64)
+	    ((u64)cqe->cqe_info.err_info.err_warn_bitmap_hi << 32) |
+	    (u64)cqe->cqe_info.err_info.err_warn_bitmap_lo;
+	for (i = 0; i < 64; i++) {
+		if (err_warn_bit_map & (u64)((u64)1 << i)) {
+			err_warn = i;
+			break;
+		}
+	}
+
+	/* Check if REC TOV expired if this is a tape device */
+	if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) {
+		if (err_warn ==
+		    FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION) {
+			QEDF_ERR(&(qedf->dbg_ctx), "REC timer expired.\n");
+			if (!test_bit(QEDF_CMD_SRR_SENT, &io_req->flags)) {
+				io_req->rx_buf_off =
+				    cqe->cqe_info.err_info.rx_buf_off;
+				io_req->tx_buf_off =
+				    cqe->cqe_info.err_info.tx_buf_off;
+				io_req->rx_id = cqe->cqe_info.err_info.rx_id;
+				rval = qedf_send_rec(io_req);
+				/*
+				 * We only want to abort the io_req if we
+				 * can't queue the REC command as we want to
+				 * keep the exchange open for recovery.
+				 */
+				if (rval)
+					goto send_abort;
+			}
+			return;
+		}
+	}
+
+send_abort:
+	init_completion(&io_req->abts_done);
+	rval = qedf_initiate_abts(io_req, true);
+	if (rval)
+		QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
+}
+
+/* Cleanup a command when we receive an error detection completion */
+void qedf_process_error_detect(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *io_req)
+{
+	int rval;
+
+	if (!cqe)
+		return;
+
+	QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Error detection CQE, "
+		  "xid=0x%x\n", io_req->xid);
+	QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx),
+		  "err_warn_bitmap=%08x:%08x\n",
+		  le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi),
+		  le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo));
+	QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, "
+		  "rx_buff_off=%08x, rx_id=%04x\n",
+		  le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off),
+		  le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off),
+		  le32_to_cpu(cqe->cqe_info.err_info.rx_id));
+
+	if (qedf->stop_io_on_error) {
+		qedf_stop_all_io(qedf);
+		return;
+	}
+
+	init_completion(&io_req->abts_done);
+	rval = qedf_initiate_abts(io_req, true);
+	if (rval)
+		QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
+}
+
+static void qedf_flush_els_req(struct qedf_ctx *qedf,
+	struct qedf_ioreq *els_req)
+{
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+	    "Flushing ELS request xid=0x%x refcount=%d.\n", els_req->xid,
+	    atomic_read(&els_req->refcount.refcount));
+
+	/*
+	 * Need to distinguish this from a timeout when calling the
+	 * els_req->cb_func.
+	 */
+	els_req->event = QEDF_IOREQ_EV_ELS_FLUSH;
+
+	/* Cancel the timer */
+	cancel_delayed_work_sync(&els_req->timeout_work);
+
+	/* Call callback function to complete command */
+	if (els_req->cb_func && els_req->cb_arg) {
+		els_req->cb_func(els_req->cb_arg);
+		els_req->cb_arg = NULL;
+	}
+
+	/* Release kref for original initiate_els */
+	kref_put(&els_req->refcount, qedf_release_cmd);
+}
+
+/* A value of -1 for lun is a wild card that means flush all
+ * active SCSI I/Os for the target.
+ */
+void qedf_flush_active_ios(struct qedf_rport *fcport, int lun)
+{
+	struct qedf_ioreq *io_req;
+	struct qedf_ctx *qedf;
+	struct qedf_cmd_mgr *cmd_mgr;
+	int i, rc;
+
+	if (!fcport)
+		return;
+
+	qedf = fcport->qedf;
+	cmd_mgr = qedf->cmd_mgr;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Flush active i/o's.\n");
+
+	for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) {
+		io_req = &cmd_mgr->cmds[i];
+
+		if (!io_req)
+			continue;
+		if (io_req->fcport != fcport)
+			continue;
+		if (io_req->cmd_type == QEDF_ELS) {
+			rc = kref_get_unless_zero(&io_req->refcount);
+			if (!rc) {
+				QEDF_ERR(&(qedf->dbg_ctx),
+				    "Could not get kref for io_req=0x%p.\n",
+				    io_req);
+				continue;
+			}
+			qedf_flush_els_req(qedf, io_req);
+			/*
+			 * Release the kref and go back to the top of the
+			 * loop.
+			 */
+			goto free_cmd;
+		}
+
+		if (!io_req->sc_cmd)
+			continue;
+		if (lun > 0) {
+			if (io_req->sc_cmd->device->lun !=
+			    (u64)lun)
+				continue;
+		}
+
+		/*
+		 * Use kref_get_unless_zero in the unlikely case the command
+		 * we're about to flush was completed in the normal SCSI path
+		 */
+		rc = kref_get_unless_zero(&io_req->refcount);
+		if (!rc) {
+			QEDF_ERR(&(qedf->dbg_ctx), "Could not get kref for "
+			    "io_req=0x%p\n", io_req);
+			continue;
+		}
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Cleanup xid=0x%x.\n", io_req->xid);
+
+		/* Cleanup task and return I/O mid-layer */
+		qedf_initiate_cleanup(io_req, true);
+
+free_cmd:
+		kref_put(&io_req->refcount, qedf_release_cmd);
+	}
+}
+
+/*
+ * Initiate a ABTS middle path command. Note that we don't have to initialize
+ * the task context for an ABTS task.
+ */
+int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts)
+{
+	struct fc_lport *lport;
+	struct qedf_rport *fcport = io_req->fcport;
+	struct fc_rport_priv *rdata = fcport->rdata;
+	struct qedf_ctx *qedf = fcport->qedf;
+	u16 xid;
+	u32 r_a_tov = 0;
+	int rc = 0;
+	unsigned long flags;
+
+	r_a_tov = rdata->r_a_tov;
+	lport = qedf->lport;
+
+	if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "tgt not offloaded\n");
+		rc = 1;
+		goto abts_err;
+	}
+
+	if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n");
+		rc = 1;
+		goto abts_err;
+	}
+
+	if (atomic_read(&qedf->link_down_tmo_valid) > 0) {
+		QEDF_ERR(&(qedf->dbg_ctx), "link_down_tmo active.\n");
+		rc = 1;
+		goto abts_err;
+	}
+
+	/* Ensure room on SQ */
+	if (!atomic_read(&fcport->free_sqes)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n");
+		rc = 1;
+		goto abts_err;
+	}
+
+
+	kref_get(&io_req->refcount);
+
+	xid = io_req->xid;
+	qedf->control_requests++;
+	qedf->packet_aborts++;
+
+	/* Set the return CPU to be the same as the request one */
+	io_req->cpu = smp_processor_id();
+
+	/* Set the command type to abort */
+	io_req->cmd_type = QEDF_ABTS;
+	io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts;
+
+	set_bit(QEDF_CMD_IN_ABORT, &io_req->flags);
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "ABTS io_req xid = "
+		   "0x%x\n", xid);
+
+	qedf_cmd_timer_set(qedf, io_req, QEDF_ABORT_TIMEOUT * HZ);
+
+	spin_lock_irqsave(&fcport->rport_lock, flags);
+
+	/* Add ABTS to send queue */
+	qedf_add_to_sq(fcport, xid, 0, FCOE_TASK_TYPE_ABTS, 0);
+
+	/* Ring doorbell */
+	qedf_ring_doorbell(fcport);
+
+	spin_unlock_irqrestore(&fcport->rport_lock, flags);
+
+	return rc;
+abts_err:
+	/*
+	 * If the ABTS task fails to queue then we need to cleanup the
+	 * task at the firmware.
+	 */
+	qedf_initiate_cleanup(io_req, return_scsi_cmd_on_abts);
+	return rc;
+}
+
+void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *io_req)
+{
+	uint32_t r_ctl;
+	uint16_t xid;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "Entered with xid = "
+		   "0x%x cmd_type = %d\n", io_req->xid, io_req->cmd_type);
+
+	cancel_delayed_work(&io_req->timeout_work);
+
+	xid = io_req->xid;
+	r_ctl = cqe->cqe_info.abts_info.r_ctl;
+
+	switch (r_ctl) {
+	case FC_RCTL_BA_ACC:
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM,
+		    "ABTS response - ACC Send RRQ after R_A_TOV\n");
+		io_req->event = QEDF_IOREQ_EV_ABORT_SUCCESS;
+		/*
+		 * Dont release this cmd yet. It will be relesed
+		 * after we get RRQ response
+		 */
+		kref_get(&io_req->refcount);
+		queue_delayed_work(qedf->dpc_wq, &io_req->rrq_work,
+		    msecs_to_jiffies(qedf->lport->r_a_tov));
+		break;
+	/* For error cases let the cleanup return the command */
+	case FC_RCTL_BA_RJT:
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM,
+		   "ABTS response - RJT\n");
+		io_req->event = QEDF_IOREQ_EV_ABORT_FAILED;
+		break;
+	default:
+		QEDF_ERR(&(qedf->dbg_ctx), "Unknown ABTS response\n");
+		break;
+	}
+
+	clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags);
+
+	if (io_req->sc_cmd) {
+		if (io_req->return_scsi_cmd_on_abts)
+			qedf_scsi_done(qedf, io_req, DID_ERROR);
+	}
+
+	/* Notify eh_abort handler that ABTS is complete */
+	complete(&io_req->abts_done);
+
+	kref_put(&io_req->refcount, qedf_release_cmd);
+}
+
+int qedf_init_mp_req(struct qedf_ioreq *io_req)
+{
+	struct qedf_mp_req *mp_req;
+	struct fcoe_sge *mp_req_bd;
+	struct fcoe_sge *mp_resp_bd;
+	struct qedf_ctx *qedf = io_req->fcport->qedf;
+	dma_addr_t addr;
+	uint64_t sz;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_MP_REQ, "Entered.\n");
+
+	mp_req = (struct qedf_mp_req *)&(io_req->mp_req);
+	memset(mp_req, 0, sizeof(struct qedf_mp_req));
+
+	if (io_req->cmd_type != QEDF_ELS) {
+		mp_req->req_len = sizeof(struct fcp_cmnd);
+		io_req->data_xfer_len = mp_req->req_len;
+	} else
+		mp_req->req_len = io_req->data_xfer_len;
+
+	mp_req->req_buf = dma_alloc_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
+	    &mp_req->req_buf_dma, GFP_KERNEL);
+	if (!mp_req->req_buf) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req buffer\n");
+		qedf_free_mp_resc(io_req);
+		return -ENOMEM;
+	}
+
+	mp_req->resp_buf = dma_alloc_coherent(&qedf->pdev->dev,
+	    QEDF_PAGE_SIZE, &mp_req->resp_buf_dma, GFP_KERNEL);
+	if (!mp_req->resp_buf) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc TM resp "
+			  "buffer\n");
+		qedf_free_mp_resc(io_req);
+		return -ENOMEM;
+	}
+
+	/* Allocate and map mp_req_bd and mp_resp_bd */
+	sz = sizeof(struct fcoe_sge);
+	mp_req->mp_req_bd = dma_alloc_coherent(&qedf->pdev->dev, sz,
+	    &mp_req->mp_req_bd_dma, GFP_KERNEL);
+	if (!mp_req->mp_req_bd) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req bd\n");
+		qedf_free_mp_resc(io_req);
+		return -ENOMEM;
+	}
+
+	mp_req->mp_resp_bd = dma_alloc_coherent(&qedf->pdev->dev, sz,
+	    &mp_req->mp_resp_bd_dma, GFP_KERNEL);
+	if (!mp_req->mp_resp_bd) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP resp bd\n");
+		qedf_free_mp_resc(io_req);
+		return -ENOMEM;
+	}
+
+	/* Fill bd table */
+	addr = mp_req->req_buf_dma;
+	mp_req_bd = mp_req->mp_req_bd;
+	mp_req_bd->sge_addr.lo = U64_LO(addr);
+	mp_req_bd->sge_addr.hi = U64_HI(addr);
+	mp_req_bd->size = QEDF_PAGE_SIZE;
+
+	/*
+	 * MP buffer is either a task mgmt command or an ELS.
+	 * So the assumption is that it consumes a single bd
+	 * entry in the bd table
+	 */
+	mp_resp_bd = mp_req->mp_resp_bd;
+	addr = mp_req->resp_buf_dma;
+	mp_resp_bd->sge_addr.lo = U64_LO(addr);
+	mp_resp_bd->sge_addr.hi = U64_HI(addr);
+	mp_resp_bd->size = QEDF_PAGE_SIZE;
+
+	return 0;
+}
+
+/*
+ * Last ditch effort to clear the port if it's stuck. Used only after a
+ * cleanup task times out.
+ */
+static void qedf_drain_request(struct qedf_ctx *qedf)
+{
+	if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "MCP drain already active.\n");
+		return;
+	}
+
+	/* Set bit to return all queuecommand requests as busy */
+	set_bit(QEDF_DRAIN_ACTIVE, &qedf->flags);
+
+	/* Call qed drain request for function. Should be synchronous */
+	qed_ops->common->drain(qedf->cdev);
+
+	/* Settle time for CQEs to be returned */
+	msleep(100);
+
+	/* Unplug and continue */
+	clear_bit(QEDF_DRAIN_ACTIVE, &qedf->flags);
+}
+
+/*
+ * Returns SUCCESS if the cleanup task does not timeout, otherwise return
+ * FAILURE.
+ */
+int qedf_initiate_cleanup(struct qedf_ioreq *io_req,
+	bool return_scsi_cmd_on_abts)
+{
+	struct qedf_rport *fcport;
+	struct qedf_ctx *qedf;
+	uint16_t xid;
+	struct fcoe_task_context *task;
+	int tmo = 0;
+	int rc = SUCCESS;
+	unsigned long flags;
+
+	fcport = io_req->fcport;
+	if (!fcport) {
+		QEDF_ERR(NULL, "fcport is NULL.\n");
+		return SUCCESS;
+	}
+
+	qedf = fcport->qedf;
+	if (!qedf) {
+		QEDF_ERR(NULL, "qedf is NULL.\n");
+		return SUCCESS;
+	}
+
+	if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) ||
+	    test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in "
+			  "cleanup processing or already completed.\n",
+			  io_req->xid);
+		return SUCCESS;
+	}
+
+	/* Ensure room on SQ */
+	if (!atomic_read(&fcport->free_sqes)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n");
+		return FAILED;
+	}
+
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Entered xid=0x%x\n",
+	    io_req->xid);
+
+	/* Cleanup cmds re-use the same TID as the original I/O */
+	xid = io_req->xid;
+	io_req->cmd_type = QEDF_CLEANUP;
+	io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts;
+
+	/* Set the return CPU to be the same as the request one */
+	io_req->cpu = smp_processor_id();
+
+	set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags);
+
+	task = qedf_get_task_mem(&qedf->tasks, xid);
+
+	init_completion(&io_req->tm_done);
+
+	/* Obtain free SQ entry */
+	spin_lock_irqsave(&fcport->rport_lock, flags);
+	qedf_add_to_sq(fcport, xid, 0, FCOE_TASK_TYPE_EXCHANGE_CLEANUP, 0);
+
+	/* Ring doorbell */
+	qedf_ring_doorbell(fcport);
+	spin_unlock_irqrestore(&fcport->rport_lock, flags);
+
+	tmo = wait_for_completion_timeout(&io_req->tm_done,
+	    QEDF_CLEANUP_TIMEOUT * HZ);
+
+	if (!tmo) {
+		rc = FAILED;
+		/* Timeout case */
+		QEDF_ERR(&(qedf->dbg_ctx), "Cleanup command timeout, "
+			  "xid=%x.\n", io_req->xid);
+		clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags);
+		/* Issue a drain request if cleanup task times out */
+		QEDF_ERR(&(qedf->dbg_ctx), "Issuing MCP drain request.\n");
+		qedf_drain_request(qedf);
+	}
+
+	if (io_req->sc_cmd) {
+		if (io_req->return_scsi_cmd_on_abts)
+			qedf_scsi_done(qedf, io_req, DID_ERROR);
+	}
+
+	if (rc == SUCCESS)
+		io_req->event = QEDF_IOREQ_EV_CLEANUP_SUCCESS;
+	else
+		io_req->event = QEDF_IOREQ_EV_CLEANUP_FAILED;
+
+	return rc;
+}
+
+void qedf_process_cleanup_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *io_req)
+{
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Entered xid = 0x%x\n",
+		   io_req->xid);
+
+	clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags);
+
+	/* Complete so we can finish cleaning up the I/O */
+	complete(&io_req->tm_done);
+}
+
+static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
+	uint8_t tm_flags)
+{
+	struct qedf_ioreq *io_req;
+	struct qedf_mp_req *tm_req;
+	struct fcoe_task_context *task;
+	struct fc_frame_header *fc_hdr;
+	struct fcp_cmnd *fcp_cmnd;
+	struct qedf_ctx *qedf = fcport->qedf;
+	int rc = 0;
+	uint16_t xid;
+	uint32_t sid, did;
+	int tmo = 0;
+	unsigned long flags;
+
+	if (!sc_cmd) {
+		QEDF_ERR(&(qedf->dbg_ctx), "invalid arg\n");
+		return FAILED;
+	}
+
+	if (!(test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))) {
+		QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n");
+		rc = FAILED;
+		return FAILED;
+	}
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "portid = 0x%x "
+		   "tm_flags = %d\n", fcport->rdata->ids.port_id, tm_flags);
+
+	io_req = qedf_alloc_cmd(fcport, QEDF_TASK_MGMT_CMD);
+	if (!io_req) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Failed TMF");
+		rc = -EAGAIN;
+		goto reset_tmf_err;
+	}
+
+	/* Initialize rest of io_req fields */
+	io_req->sc_cmd = sc_cmd;
+	io_req->fcport = fcport;
+	io_req->cmd_type = QEDF_TASK_MGMT_CMD;
+
+	/* Set the return CPU to be the same as the request one */
+	io_req->cpu = smp_processor_id();
+
+	tm_req = (struct qedf_mp_req *)&(io_req->mp_req);
+
+	rc = qedf_init_mp_req(io_req);
+	if (rc == FAILED) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Task mgmt MP request init "
+			  "failed\n");
+		kref_put(&io_req->refcount, qedf_release_cmd);
+		goto reset_tmf_err;
+	}
+
+	/* Set TM flags */
+	io_req->io_req_flags = 0;
+	tm_req->tm_flags = tm_flags;
+
+	/* Default is to return a SCSI command when an error occurs */
+	io_req->return_scsi_cmd_on_abts = true;
+
+	/* Fill FCP_CMND */
+	qedf_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);
+	fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;
+	memset(fcp_cmnd->fc_cdb, 0, FCP_CMND_LEN);
+	fcp_cmnd->fc_dl = 0;
+
+	/* Fill FC header */
+	fc_hdr = &(tm_req->req_fc_hdr);
+	sid = fcport->sid;
+	did = fcport->rdata->ids.port_id;
+	__fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, sid, did,
+			   FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
+			   FC_FC_SEQ_INIT, 0);
+	/* Obtain exchange id */
+	xid = io_req->xid;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "TMF io_req xid = "
+		   "0x%x\n", xid);
+
+	/* Initialize task context for this IO request */
+	task = qedf_get_task_mem(&qedf->tasks, xid);
+	qedf_init_mp_task(io_req, task);
+
+	init_completion(&io_req->tm_done);
+
+	/* Obtain free SQ entry */
+	spin_lock_irqsave(&fcport->rport_lock, flags);
+	qedf_add_to_sq(fcport, xid, 0, FCOE_TASK_TYPE_MIDPATH, 0);
+
+	/* Ring doorbell */
+	qedf_ring_doorbell(fcport);
+	spin_unlock_irqrestore(&fcport->rport_lock, flags);
+
+	tmo = wait_for_completion_timeout(&io_req->tm_done,
+	    QEDF_TM_TIMEOUT * HZ);
+
+	if (!tmo) {
+		rc = FAILED;
+		QEDF_ERR(&(qedf->dbg_ctx), "wait for tm_cmpl timeout!\n");
+	} else {
+		/* Check TMF response code */
+		if (io_req->fcp_rsp_code == 0)
+			rc = SUCCESS;
+		else
+			rc = FAILED;
+	}
+
+	if (tm_flags == FCP_TMF_LUN_RESET)
+		qedf_flush_active_ios(fcport, (int)sc_cmd->device->lun);
+	else
+		qedf_flush_active_ios(fcport, -1);
+
+	kref_put(&io_req->refcount, qedf_release_cmd);
+
+	if (rc != SUCCESS) {
+		QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command failed...\n");
+		rc = FAILED;
+	} else {
+		QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command success...\n");
+		rc = SUCCESS;
+	}
+reset_tmf_err:
+	return rc;
+}
+
+int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
+{
+	struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
+	struct fc_rport_libfc_priv *rp = rport->dd_data;
+	struct qedf_rport *fcport = (struct qedf_rport *)&rp[1];
+	struct qedf_ctx *qedf;
+	struct fc_lport *lport;
+	int rc = SUCCESS;
+	int rval;
+
+	rval = fc_remote_port_chkready(rport);
+
+	if (rval) {
+		QEDF_ERR(NULL, "device_reset rport not ready\n");
+		rc = FAILED;
+		goto tmf_err;
+	}
+
+	if (fcport == NULL) {
+		QEDF_ERR(NULL, "device_reset: rport is NULL\n");
+		rc = FAILED;
+		goto tmf_err;
+	}
+
+	qedf = fcport->qedf;
+	lport = qedf->lport;
+
+	if (test_bit(QEDF_UNLOADING, &qedf->flags) ||
+	    test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) {
+		rc = SUCCESS;
+		goto tmf_err;
+	}
+
+	if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n");
+		rc = FAILED;
+		goto tmf_err;
+	}
+
+	rc = qedf_execute_tmf(fcport, sc_cmd, tm_flags);
+
+tmf_err:
+	return rc;
+}
+
+void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
+	struct qedf_ioreq *io_req)
+{
+	struct fcoe_cqe_rsp_info *fcp_rsp;
+	struct fcoe_cqe_midpath_info *mp_info;
+
+
+	/* Get TMF response length from CQE */
+	mp_info = &cqe->cqe_info.midpath_info;
+	io_req->mp_req.resp_len = mp_info->data_placement_size;
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM,
+	    "Response len is %d.\n", io_req->mp_req.resp_len);
+
+	fcp_rsp = &cqe->cqe_info.rsp_info;
+	qedf_parse_fcp_rsp(io_req, fcp_rsp);
+
+	io_req->sc_cmd = NULL;
+	complete(&io_req->tm_done);
+}
+
+void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx,
+	struct fcoe_cqe *cqe)
+{
+	unsigned long flags;
+	uint16_t tmp;
+	uint16_t pktlen = cqe->cqe_info.unsolic_info.pkt_len;
+	u32 payload_len, crc;
+	struct fc_frame_header *fh;
+	struct fc_frame *fp;
+	struct qedf_io_work *io_work;
+	u32 bdq_idx;
+	void *bdq_addr;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
+	    "address.hi=%x address.lo=%x opaque_data.hi=%x "
+	    "opaque_data.lo=%x bdq_prod_idx=%u len=%u.\n",
+	    le32_to_cpu(cqe->cqe_info.unsolic_info.bd_info.address.hi),
+	    le32_to_cpu(cqe->cqe_info.unsolic_info.bd_info.address.lo),
+	    le32_to_cpu(cqe->cqe_info.unsolic_info.bd_info.opaque.hi),
+	    le32_to_cpu(cqe->cqe_info.unsolic_info.bd_info.opaque.lo),
+	    qedf->bdq_prod_idx, pktlen);
+
+	bdq_idx = le32_to_cpu(cqe->cqe_info.unsolic_info.bd_info.opaque.lo);
+	if (bdq_idx >= QEDF_BDQ_SIZE) {
+		QEDF_ERR(&(qedf->dbg_ctx), "bdq_idx is out of range %d.\n",
+		    bdq_idx);
+		goto increment_prod;
+	}
+
+	bdq_addr = qedf->bdq[bdq_idx].buf_addr;
+	if (!bdq_addr) {
+		QEDF_ERR(&(qedf->dbg_ctx), "bdq_addr is NULL, dropping "
+		    "unsolicited packet.\n");
+		goto increment_prod;
+	}
+
+	if (qedf_dump_frames) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
+		    "BDQ frame is at addr=%p.\n", bdq_addr);
+		print_hex_dump(KERN_WARNING, "bdq ", DUMP_PREFIX_OFFSET, 16, 1,
+		    (void *)bdq_addr, pktlen, false);
+	}
+
+	/* Allocate frame */
+	payload_len = pktlen - sizeof(struct fc_frame_header);
+	fp = fc_frame_alloc(qedf->lport, payload_len);
+	if (!fp) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate fp.\n");
+		goto increment_prod;
+	}
+
+	/* Copy data from BDQ buffer into fc_frame struct */
+	fh = (struct fc_frame_header *)fc_frame_header_get(fp);
+	memcpy(fh, (void *)bdq_addr, pktlen);
+
+	/* Initialize the frame so libfc sees it as a valid frame */
+	crc = fcoe_fc_crc(fp);
+	fc_frame_init(fp);
+	fr_dev(fp) = qedf->lport;
+	fr_sof(fp) = FC_SOF_I3;
+	fr_eof(fp) = FC_EOF_T;
+	fr_crc(fp) = cpu_to_le32(~crc);
+
+	/*
+	 * We need to return the frame back up to libfc in a non-atomic
+	 * context
+	 */
+	io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC);
+	if (!io_work) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
+			   "work for I/O completion.\n");
+		fc_frame_free(fp);
+		goto increment_prod;
+	}
+	memset(io_work, 0, sizeof(struct qedf_io_work));
+
+	INIT_WORK(&io_work->work, qedf_fp_io_handler);
+
+	/* Copy contents of CQE for deferred processing */
+	memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe));
+
+	io_work->qedf = qedf;
+	io_work->fp = fp;
+
+	queue_work_on(smp_processor_id(), qedf_io_wq, &io_work->work);
+increment_prod:
+	spin_lock_irqsave(&qedf->hba_lock, flags);
+
+	/* Increment producer to let f/w know we've handled the frame */
+	qedf->bdq_prod_idx++;
+
+	/* Producer index wraps at uint16_t boundary */
+	if (qedf->bdq_prod_idx == 0xffff)
+		qedf->bdq_prod_idx = 0;
+
+	writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod);
+	tmp = readw(qedf->bdq_primary_prod);
+	writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod);
+	tmp = readw(qedf->bdq_secondary_prod);
+
+	spin_unlock_irqrestore(&qedf->hba_lock, flags);
+}

drivers/scsi/qedf/qedf_main.c

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <linux/highmem.h>
+#include <linux/crc32.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/kthread.h>
+#include <scsi/libfc.h>
+#include <scsi/scsi_host.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/cpu.h>
+#include "qedf.h"
+
+const struct qed_fcoe_ops *qed_ops;
+
+static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id);
+static void qedf_remove(struct pci_dev *pdev);
+
+extern struct qedf_debugfs_ops qedf_debugfs_ops;
+extern struct file_operations qedf_dbg_fops;
+
+/*
+ * Driver module parameters.
+ */
+static unsigned int qedf_dev_loss_tmo = 60;
+module_param_named(dev_loss_tmo, qedf_dev_loss_tmo, int, S_IRUGO);
+MODULE_PARM_DESC(dev_loss_tmo,  " dev_loss_tmo setting for attached "
+	"remote ports (default 60)");
+
+uint qedf_debug = QEDF_LOG_INFO;
+module_param_named(debug, qedf_debug, uint, S_IRUGO);
+MODULE_PARM_DESC(qedf_debug, " Debug mask. Pass '1' to enable default debugging"
+	" mask");
+
+static uint qedf_fipvlan_retries = 30;
+module_param_named(fipvlan_retries, qedf_fipvlan_retries, int, S_IRUGO);
+MODULE_PARM_DESC(fipvlan_retries, " Number of FIP VLAN requests to attempt "
+	"before giving up (default 30)");
+
+static uint qedf_fallback_vlan = QEDF_FALLBACK_VLAN;
+module_param_named(fallback_vlan, qedf_fallback_vlan, int, S_IRUGO);
+MODULE_PARM_DESC(fallback_vlan, " VLAN ID to try if fip vlan request fails "
+	"(default 1002).");
+
+static uint qedf_default_prio = QEDF_DEFAULT_PRIO;
+module_param_named(default_prio, qedf_default_prio, int, S_IRUGO);
+MODULE_PARM_DESC(default_prio, " Default 802.1q priority for FIP and FCoE"
+	" traffic (default 3).");
+
+uint qedf_dump_frames;
+module_param_named(dump_frames, qedf_dump_frames, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dump_frames, " Print the skb data of FIP and FCoE frames "
+	"(default off)");
+
+static uint qedf_queue_depth;
+module_param_named(queue_depth, qedf_queue_depth, int, S_IRUGO);
+MODULE_PARM_DESC(queue_depth, " Sets the queue depth for all LUNs discovered "
+	"by the qedf driver. Default is 0 (use OS default).");
+
+uint qedf_io_tracing;
+module_param_named(io_tracing, qedf_io_tracing, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(io_tracing, " Enable logging of SCSI requests/completions "
+	"into trace buffer. (default off).");
+
+static uint qedf_max_lun = MAX_FIBRE_LUNS;
+module_param_named(max_lun, qedf_max_lun, int, S_IRUGO);
+MODULE_PARM_DESC(max_lun, " Sets the maximum luns per target that the driver "
+	"supports. (default 0xffffffff)");
+
+uint qedf_link_down_tmo;
+module_param_named(link_down_tmo, qedf_link_down_tmo, int, S_IRUGO);
+MODULE_PARM_DESC(link_down_tmo, " Delays informing the fcoe transport that the "
+	"link is down by N seconds.");
+
+bool qedf_retry_delay;
+module_param_named(retry_delay, qedf_retry_delay, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(retry_delay, " Enable/disable handling of FCP_RSP IU retry "
+	"delay handling (default off).");
+
+static uint qedf_dp_module;
+module_param_named(dp_module, qedf_dp_module, uint, S_IRUGO);
+MODULE_PARM_DESC(dp_module, " bit flags control for verbose printk passed "
+	"qed module during probe.");
+
+static uint qedf_dp_level;
+module_param_named(dp_level, qedf_dp_level, uint, S_IRUGO);
+MODULE_PARM_DESC(dp_level, " printk verbosity control passed to qed module  "
+	"during probe (0-3: 0 more verbose).");
+
+struct workqueue_struct *qedf_io_wq;
+
+static struct fcoe_percpu_s qedf_global;
+static DEFINE_SPINLOCK(qedf_global_lock);
+
+static struct kmem_cache *qedf_io_work_cache;
+
+void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id)
+{
+	qedf->vlan_id = vlan_id;
+	qedf->vlan_id |= qedf_default_prio << VLAN_PRIO_SHIFT;
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Setting vlan_id=%04x "
+		   "prio=%d.\n", vlan_id, qedf_default_prio);
+}
+
+/* Returns true if we have a valid vlan, false otherwise */
+static bool qedf_initiate_fipvlan_req(struct qedf_ctx *qedf)
+{
+	int rc;
+
+	if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Link not up.\n");
+		return  false;
+	}
+
+	while (qedf->fipvlan_retries--) {
+		if (qedf->vlan_id > 0)
+			return true;
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			   "Retry %d.\n", qedf->fipvlan_retries);
+		init_completion(&qedf->fipvlan_compl);
+		qedf_fcoe_send_vlan_req(qedf);
+		rc = wait_for_completion_timeout(&qedf->fipvlan_compl,
+		    1 * HZ);
+		if (rc > 0) {
+			fcoe_ctlr_link_up(&qedf->ctlr);
+			return true;
+		}
+	}
+
+	return false;
+}
+
+static void qedf_handle_link_update(struct work_struct *work)
+{
+	struct qedf_ctx *qedf =
+	    container_of(work, struct qedf_ctx, link_update.work);
+	int rc;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Entered.\n");
+
+	if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
+		rc = qedf_initiate_fipvlan_req(qedf);
+		if (rc)
+			return;
+		/*
+		 * If we get here then we never received a repsonse to our
+		 * fip vlan request so set the vlan_id to the default and
+		 * tell FCoE that the link is up
+		 */
+		QEDF_WARN(&(qedf->dbg_ctx), "Did not receive FIP VLAN "
+			   "response, falling back to default VLAN %d.\n",
+			   qedf_fallback_vlan);
+		qedf_set_vlan_id(qedf, QEDF_FALLBACK_VLAN);
+
+		/*
+		 * Zero out data_src_addr so we'll update it with the new
+		 * lport port_id
+		 */
+		eth_zero_addr(qedf->data_src_addr);
+		fcoe_ctlr_link_up(&qedf->ctlr);
+	} else if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
+		/*
+		 * If we hit here and link_down_tmo_valid is still 1 it means
+		 * that link_down_tmo timed out so set it to 0 to make sure any
+		 * other readers have accurate state.
+		 */
+		atomic_set(&qedf->link_down_tmo_valid, 0);
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+		    "Calling fcoe_ctlr_link_down().\n");
+		fcoe_ctlr_link_down(&qedf->ctlr);
+		qedf_wait_for_upload(qedf);
+		/* Reset the number of FIP VLAN retries */
+		qedf->fipvlan_retries = qedf_fipvlan_retries;
+	}
+}
+
+static void qedf_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
+	void *arg)
+{
+	struct fc_exch *exch = fc_seq_exch(seq);
+	struct fc_lport *lport = exch->lp;
+	struct qedf_ctx *qedf = lport_priv(lport);
+
+	if (!qedf) {
+		QEDF_ERR(NULL, "qedf is NULL.\n");
+		return;
+	}
+
+	/*
+	 * If ERR_PTR is set then don't try to stat anything as it will cause
+	 * a crash when we access fp.
+	 */
+	if (IS_ERR(fp)) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+		    "fp has IS_ERR() set.\n");
+		goto skip_stat;
+	}
+
+	/* Log stats for FLOGI reject */
+	if (fc_frame_payload_op(fp) == ELS_LS_RJT)
+		qedf->flogi_failed++;
+
+	/* Complete flogi_compl so we can proceed to sending ADISCs */
+	complete(&qedf->flogi_compl);
+
+skip_stat:
+	/* Report response to libfc */
+	fc_lport_flogi_resp(seq, fp, lport);
+}
+
+static struct fc_seq *qedf_elsct_send(struct fc_lport *lport, u32 did,
+	struct fc_frame *fp, unsigned int op,
+	void (*resp)(struct fc_seq *,
+	struct fc_frame *,
+	void *),
+	void *arg, u32 timeout)
+{
+	struct qedf_ctx *qedf = lport_priv(lport);
+
+	/*
+	 * Intercept FLOGI for statistic purposes. Note we use the resp
+	 * callback to tell if this is really a flogi.
+	 */
+	if (resp == fc_lport_flogi_resp) {
+		qedf->flogi_cnt++;
+		return fc_elsct_send(lport, did, fp, op, qedf_flogi_resp,
+		    arg, timeout);
+	}
+
+	return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
+}
+
+int qedf_send_flogi(struct qedf_ctx *qedf)
+{
+	struct fc_lport *lport;
+	struct fc_frame *fp;
+
+	lport = qedf->lport;
+
+	if (!lport->tt.elsct_send)
+		return -EINVAL;
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
+	if (!fp) {
+		QEDF_ERR(&(qedf->dbg_ctx), "fc_frame_alloc failed.\n");
+		return -ENOMEM;
+	}
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
+	    "Sending FLOGI to reestablish session with switch.\n");
+	lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
+	    ELS_FLOGI, qedf_flogi_resp, lport, lport->r_a_tov);
+
+	init_completion(&qedf->flogi_compl);
+
+	return 0;
+}
+
+struct qedf_tmp_rdata_item {
+	struct fc_rport_priv *rdata;
+	struct list_head list;
+};
+
+/*
+ * This function is called if link_down_tmo is in use.  If we get a link up and
+ * link_down_tmo has not expired then use just FLOGI/ADISC to recover our
+ * sessions with targets.  Otherwise, just call fcoe_ctlr_link_up().
+ */
+static void qedf_link_recovery(struct work_struct *work)
+{
+	struct qedf_ctx *qedf =
+	    container_of(work, struct qedf_ctx, link_recovery.work);
+	struct qedf_rport *fcport;
+	struct fc_rport_priv *rdata;
+	struct qedf_tmp_rdata_item *rdata_item, *tmp_rdata_item;
+	bool rc;
+	int retries = 30;
+	int rval, i;
+	struct list_head rdata_login_list;
+
+	INIT_LIST_HEAD(&rdata_login_list);
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+	    "Link down tmo did not expire.\n");
+
+	/*
+	 * Essentially reset the fcoe_ctlr here without affecting the state
+	 * of the libfc structs.
+	 */
+	qedf->ctlr.state = FIP_ST_LINK_WAIT;
+	fcoe_ctlr_link_down(&qedf->ctlr);
+
+	/*
+	 * Bring the link up before we send the fipvlan request so libfcoe
+	 * can select a new fcf in parallel
+	 */
+	fcoe_ctlr_link_up(&qedf->ctlr);
+
+	/* Since the link when down and up to verify which vlan we're on */
+	qedf->fipvlan_retries = qedf_fipvlan_retries;
+	rc = qedf_initiate_fipvlan_req(qedf);
+	if (!rc)
+		return;
+
+	/*
+	 * We need to wait for an FCF to be selected due to the
+	 * fcoe_ctlr_link_up other the FLOGI will be rejected.
+	 */
+	while (retries > 0) {
+		if (qedf->ctlr.sel_fcf) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "FCF reselected, proceeding with FLOGI.\n");
+			break;
+		}
+		msleep(500);
+		retries--;
+	}
+
+	if (retries < 1) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Exhausted retries waiting for "
+		    "FCF selection.\n");
+		return;
+	}
+
+	rval = qedf_send_flogi(qedf);
+	if (rval)
+		return;
+
+	/* Wait for FLOGI completion before proceeding with sending ADISCs */
+	i = wait_for_completion_timeout(&qedf->flogi_compl,
+	    qedf->lport->r_a_tov);
+	if (i == 0) {
+		QEDF_ERR(&(qedf->dbg_ctx), "FLOGI timed out.\n");
+		return;
+	}
+
+	/*
+	 * Call lport->tt.rport_login which will cause libfc to send an
+	 * ADISC since the rport is in state ready.
+	 */
+	rcu_read_lock();
+	list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
+		rdata = fcport->rdata;
+		if (rdata == NULL)
+			continue;
+		rdata_item = kzalloc(sizeof(struct qedf_tmp_rdata_item),
+		    GFP_ATOMIC);
+		if (!rdata_item)
+			continue;
+		if (kref_get_unless_zero(&rdata->kref)) {
+			rdata_item->rdata = rdata;
+			list_add(&rdata_item->list, &rdata_login_list);
+		} else
+			kfree(rdata_item);
+	}
+	rcu_read_unlock();
+	/*
+	 * Do the fc_rport_login outside of the rcu lock so we don't take a
+	 * mutex in an atomic context.
+	 */
+	list_for_each_entry_safe(rdata_item, tmp_rdata_item, &rdata_login_list,
+	    list) {
+		list_del(&rdata_item->list);
+		fc_rport_login(rdata_item->rdata);
+		kref_put(&rdata_item->rdata->kref, fc_rport_destroy);
+		kfree(rdata_item);
+	}
+}
+
+static void qedf_update_link_speed(struct qedf_ctx *qedf,
+	struct qed_link_output *link)
+{
+	struct fc_lport *lport = qedf->lport;
+
+	lport->link_speed = FC_PORTSPEED_UNKNOWN;
+	lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;
+
+	/* Set fc_host link speed */
+	switch (link->speed) {
+	case 10000:
+		lport->link_speed = FC_PORTSPEED_10GBIT;
+		break;
+	case 25000:
+		lport->link_speed = FC_PORTSPEED_25GBIT;
+		break;
+	case 40000:
+		lport->link_speed = FC_PORTSPEED_40GBIT;
+		break;
+	case 50000:
+		lport->link_speed = FC_PORTSPEED_50GBIT;
+		break;
+	case 100000:
+		lport->link_speed = FC_PORTSPEED_100GBIT;
+		break;
+	default:
+		lport->link_speed = FC_PORTSPEED_UNKNOWN;
+		break;
+	}
+
+	/*
+	 * Set supported link speed by querying the supported
+	 * capabilities of the link.
+	 */
+	if (link->supported_caps & SUPPORTED_10000baseKR_Full)
+		lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;
+	if (link->supported_caps & SUPPORTED_25000baseKR_Full)
+		lport->link_supported_speeds |= FC_PORTSPEED_25GBIT;
+	if (link->supported_caps & SUPPORTED_40000baseLR4_Full)
+		lport->link_supported_speeds |= FC_PORTSPEED_40GBIT;
+	if (link->supported_caps & SUPPORTED_50000baseKR2_Full)
+		lport->link_supported_speeds |= FC_PORTSPEED_50GBIT;
+	if (link->supported_caps & SUPPORTED_100000baseKR4_Full)
+		lport->link_supported_speeds |= FC_PORTSPEED_100GBIT;
+	fc_host_supported_speeds(lport->host) = lport->link_supported_speeds;
+}
+
+static void qedf_link_update(void *dev, struct qed_link_output *link)
+{
+	struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
+
+	if (link->link_up) {
+		QEDF_ERR(&(qedf->dbg_ctx), "LINK UP (%d GB/s).\n",
+		    link->speed / 1000);
+
+		/* Cancel any pending link down work */
+		cancel_delayed_work(&qedf->link_update);
+
+		atomic_set(&qedf->link_state, QEDF_LINK_UP);
+		qedf_update_link_speed(qedf, link);
+
+		if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE) {
+			QEDF_ERR(&(qedf->dbg_ctx), "DCBx done.\n");
+			if (atomic_read(&qedf->link_down_tmo_valid) > 0)
+				queue_delayed_work(qedf->link_update_wq,
+				    &qedf->link_recovery, 0);
+			else
+				queue_delayed_work(qedf->link_update_wq,
+				    &qedf->link_update, 0);
+			atomic_set(&qedf->link_down_tmo_valid, 0);
+		}
+
+	} else {
+		QEDF_ERR(&(qedf->dbg_ctx), "LINK DOWN.\n");
+
+		atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
+		atomic_set(&qedf->dcbx, QEDF_DCBX_PENDING);
+		/*
+		 * Flag that we're waiting for the link to come back up before
+		 * informing the fcoe layer of the event.
+		 */
+		if (qedf_link_down_tmo > 0) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "Starting link down tmo.\n");
+			atomic_set(&qedf->link_down_tmo_valid, 1);
+		}
+		qedf->vlan_id  = 0;
+		qedf_update_link_speed(qedf, link);
+		queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
+		    qedf_link_down_tmo * HZ);
+	}
+}
+
+
+static void qedf_dcbx_handler(void *dev, struct qed_dcbx_get *get, u32 mib_type)
+{
+	struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
+
+	QEDF_ERR(&(qedf->dbg_ctx), "DCBx event valid=%d enabled=%d fcoe "
+	    "prio=%d.\n", get->operational.valid, get->operational.enabled,
+	    get->operational.app_prio.fcoe);
+
+	if (get->operational.enabled && get->operational.valid) {
+		/* If DCBX was already negotiated on link up then just exit */
+		if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "DCBX already set on link up.\n");
+			return;
+		}
+
+		atomic_set(&qedf->dcbx, QEDF_DCBX_DONE);
+
+		if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
+			if (atomic_read(&qedf->link_down_tmo_valid) > 0)
+				queue_delayed_work(qedf->link_update_wq,
+				    &qedf->link_recovery, 0);
+			else
+				queue_delayed_work(qedf->link_update_wq,
+				    &qedf->link_update, 0);
+			atomic_set(&qedf->link_down_tmo_valid, 0);
+		}
+	}
+
+}
+
+static u32 qedf_get_login_failures(void *cookie)
+{
+	struct qedf_ctx *qedf;
+
+	qedf = (struct qedf_ctx *)cookie;
+	return qedf->flogi_failed;
+}
+
+static struct qed_fcoe_cb_ops qedf_cb_ops = {
+	{
+		.link_update = qedf_link_update,
+		.dcbx_aen = qedf_dcbx_handler,
+	}
+};
+
+/*
+ * Various transport templates.
+ */
+
+static struct scsi_transport_template *qedf_fc_transport_template;
+static struct scsi_transport_template *qedf_fc_vport_transport_template;
+
+/*
+ * SCSI EH handlers
+ */
+static int qedf_eh_abort(struct scsi_cmnd *sc_cmd)
+{
+	struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
+	struct fc_rport_libfc_priv *rp = rport->dd_data;
+	struct qedf_rport *fcport;
+	struct fc_lport *lport;
+	struct qedf_ctx *qedf;
+	struct qedf_ioreq *io_req;
+	int rc = FAILED;
+	int rval;
+
+	if (fc_remote_port_chkready(rport)) {
+		QEDF_ERR(NULL, "rport not ready\n");
+		goto out;
+	}
+
+	lport = shost_priv(sc_cmd->device->host);
+	qedf = (struct qedf_ctx *)lport_priv(lport);
+
+	if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "link not ready.\n");
+		goto out;
+	}
+
+	fcport = (struct qedf_rport *)&rp[1];
+
+	io_req = (struct qedf_ioreq *)sc_cmd->SCp.ptr;
+	if (!io_req) {
+		QEDF_ERR(&(qedf->dbg_ctx), "io_req is NULL.\n");
+		rc = SUCCESS;
+		goto out;
+	}
+
+	if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) ||
+	    test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) ||
+	    test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in "
+			  "cleanup or abort processing or already "
+			  "completed.\n", io_req->xid);
+		rc = SUCCESS;
+		goto out;
+	}
+
+	QEDF_ERR(&(qedf->dbg_ctx), "Aborting io_req sc_cmd=%p xid=0x%x "
+		  "fp_idx=%d.\n", sc_cmd, io_req->xid, io_req->fp_idx);
+
+	if (qedf->stop_io_on_error) {
+		qedf_stop_all_io(qedf);
+		rc = SUCCESS;
+		goto out;
+	}
+
+	init_completion(&io_req->abts_done);
+	rval = qedf_initiate_abts(io_req, true);
+	if (rval) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
+		goto out;
+	}
+
+	wait_for_completion(&io_req->abts_done);
+
+	if (io_req->event == QEDF_IOREQ_EV_ABORT_SUCCESS ||
+	    io_req->event == QEDF_IOREQ_EV_ABORT_FAILED ||
+	    io_req->event == QEDF_IOREQ_EV_CLEANUP_SUCCESS) {
+		/*
+		 * If we get a reponse to the abort this is success from
+		 * the perspective that all references to the command have
+		 * been removed from the driver and firmware
+		 */
+		rc = SUCCESS;
+	} else {
+		/* If the abort and cleanup failed then return a failure */
+		rc = FAILED;
+	}
+
+	if (rc == SUCCESS)
+		QEDF_ERR(&(qedf->dbg_ctx), "ABTS succeeded, xid=0x%x.\n",
+			  io_req->xid);
+	else
+		QEDF_ERR(&(qedf->dbg_ctx), "ABTS failed, xid=0x%x.\n",
+			  io_req->xid);
+
+out:
+	return rc;
+}
+
+static int qedf_eh_target_reset(struct scsi_cmnd *sc_cmd)
+{
+	QEDF_ERR(NULL, "TARGET RESET Issued...");
+	return qedf_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
+}
+
+static int qedf_eh_device_reset(struct scsi_cmnd *sc_cmd)
+{
+	QEDF_ERR(NULL, "LUN RESET Issued...\n");
+	return qedf_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
+}
+
+void qedf_wait_for_upload(struct qedf_ctx *qedf)
+{
+	while (1) {
+		if (atomic_read(&qedf->num_offloads))
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "Waiting for all uploads to complete.\n");
+		else
+			break;
+		msleep(500);
+	}
+}
+
+/* Reset the host by gracefully logging out and then logging back in */
+static int qedf_eh_host_reset(struct scsi_cmnd *sc_cmd)
+{
+	struct fc_lport *lport;
+	struct qedf_ctx *qedf;
+
+	lport = shost_priv(sc_cmd->device->host);
+
+	if (lport->vport) {
+		QEDF_ERR(NULL, "Cannot issue host reset on NPIV port.\n");
+		return SUCCESS;
+	}
+
+	qedf = (struct qedf_ctx *)lport_priv(lport);
+
+	if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN ||
+	    test_bit(QEDF_UNLOADING, &qedf->flags) ||
+	    test_bit(QEDF_DBG_STOP_IO, &qedf->flags))
+		return FAILED;
+
+	QEDF_ERR(&(qedf->dbg_ctx), "HOST RESET Issued...");
+
+	/* For host reset, essentially do a soft link up/down */
+	atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
+	atomic_set(&qedf->dcbx, QEDF_DCBX_PENDING);
+	queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
+	    0);
+	qedf_wait_for_upload(qedf);
+	atomic_set(&qedf->link_state, QEDF_LINK_UP);
+	qedf->vlan_id  = 0;
+	queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
+	    0);
+
+	return SUCCESS;
+}
+
+static int qedf_slave_configure(struct scsi_device *sdev)
+{
+	if (qedf_queue_depth) {
+		scsi_change_queue_depth(sdev, qedf_queue_depth);
+	}
+
+	return 0;
+}
+
+static struct scsi_host_template qedf_host_template = {
+	.module 	= THIS_MODULE,
+	.name 		= QEDF_MODULE_NAME,
+	.this_id 	= -1,
+	.cmd_per_lun 	= 3,
+	.use_clustering = ENABLE_CLUSTERING,
+	.max_sectors 	= 0xffff,
+	.queuecommand 	= qedf_queuecommand,
+	.shost_attrs	= qedf_host_attrs,
+	.eh_abort_handler	= qedf_eh_abort,
+	.eh_device_reset_handler = qedf_eh_device_reset, /* lun reset */
+	.eh_target_reset_handler = qedf_eh_target_reset, /* target reset */
+	.eh_host_reset_handler  = qedf_eh_host_reset,
+	.slave_configure	= qedf_slave_configure,
+	.dma_boundary = QED_HW_DMA_BOUNDARY,
+	.sg_tablesize = QEDF_MAX_BDS_PER_CMD,
+	.can_queue = FCOE_PARAMS_NUM_TASKS,
+};
+
+static int qedf_get_paged_crc_eof(struct sk_buff *skb, int tlen)
+{
+	int rc;
+
+	spin_lock(&qedf_global_lock);
+	rc = fcoe_get_paged_crc_eof(skb, tlen, &qedf_global);
+	spin_unlock(&qedf_global_lock);
+
+	return rc;
+}
+
+static struct qedf_rport *qedf_fcport_lookup(struct qedf_ctx *qedf, u32 port_id)
+{
+	struct qedf_rport *fcport;
+	struct fc_rport_priv *rdata;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
+		rdata = fcport->rdata;
+		if (rdata == NULL)
+			continue;
+		if (rdata->ids.port_id == port_id) {
+			rcu_read_unlock();
+			return fcport;
+		}
+	}
+	rcu_read_unlock();
+
+	/* Return NULL to caller to let them know fcport was not found */
+	return NULL;
+}
+
+/* Transmits an ELS frame over an offloaded session */
+static int qedf_xmit_l2_frame(struct qedf_rport *fcport, struct fc_frame *fp)
+{
+	struct fc_frame_header *fh;
+	int rc = 0;
+
+	fh = fc_frame_header_get(fp);
+	if ((fh->fh_type == FC_TYPE_ELS) &&
+	    (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
+		switch (fc_frame_payload_op(fp)) {
+		case ELS_ADISC:
+			qedf_send_adisc(fcport, fp);
+			rc = 1;
+			break;
+		}
+	}
+
+	return rc;
+}
+
+/**
+ * qedf_xmit - qedf FCoE frame transmit function
+ *
+ */
+static int qedf_xmit(struct fc_lport *lport, struct fc_frame *fp)
+{
+	struct fc_lport		*base_lport;
+	struct qedf_ctx		*qedf;
+	struct ethhdr		*eh;
+	struct fcoe_crc_eof	*cp;
+	struct sk_buff		*skb;
+	struct fc_frame_header	*fh;
+	struct fcoe_hdr		*hp;
+	u8			sof, eof;
+	u32			crc;
+	unsigned int		hlen, tlen, elen;
+	int			wlen;
+	struct fc_stats		*stats;
+	struct fc_lport *tmp_lport;
+	struct fc_lport *vn_port = NULL;
+	struct qedf_rport *fcport;
+	int rc;
+	u16 vlan_tci = 0;
+
+	qedf = (struct qedf_ctx *)lport_priv(lport);
+
+	fh = fc_frame_header_get(fp);
+	skb = fp_skb(fp);
+
+	/* Filter out traffic to other NPIV ports on the same host */
+	if (lport->vport)
+		base_lport = shost_priv(vport_to_shost(lport->vport));
+	else
+		base_lport = lport;
+
+	/* Flag if the destination is the base port */
+	if (base_lport->port_id == ntoh24(fh->fh_d_id)) {
+		vn_port = base_lport;
+	} else {
+		/* Got through the list of vports attached to the base_lport
+		 * and see if we have a match with the destination address.
+		 */
+		list_for_each_entry(tmp_lport, &base_lport->vports, list) {
+			if (tmp_lport->port_id == ntoh24(fh->fh_d_id)) {
+				vn_port = tmp_lport;
+				break;
+			}
+		}
+	}
+	if (vn_port && ntoh24(fh->fh_d_id) != FC_FID_FLOGI) {
+		struct fc_rport_priv *rdata = NULL;
+
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
+		    "Dropping FCoE frame to %06x.\n", ntoh24(fh->fh_d_id));
+		kfree_skb(skb);
+		rdata = fc_rport_lookup(lport, ntoh24(fh->fh_d_id));
+		if (rdata)
+			rdata->retries = lport->max_rport_retry_count;
+		return -EINVAL;
+	}
+	/* End NPIV filtering */
+
+	if (!qedf->ctlr.sel_fcf) {
+		kfree_skb(skb);
+		return 0;
+	}
+
+	if (!test_bit(QEDF_LL2_STARTED, &qedf->flags)) {
+		QEDF_WARN(&(qedf->dbg_ctx), "LL2 not started\n");
+		kfree_skb(skb);
+		return 0;
+	}
+
+	if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
+		QEDF_WARN(&(qedf->dbg_ctx), "qedf link down\n");
+		kfree_skb(skb);
+		return 0;
+	}
+
+	if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
+		if (fcoe_ctlr_els_send(&qedf->ctlr, lport, skb))
+			return 0;
+	}
+
+	/* Check to see if this needs to be sent on an offloaded session */
+	fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
+
+	if (fcport && test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
+		rc = qedf_xmit_l2_frame(fcport, fp);
+		/*
+		 * If the frame was successfully sent over the middle path
+		 * then do not try to also send it over the LL2 path
+		 */
+		if (rc)
+			return 0;
+	}
+
+	sof = fr_sof(fp);
+	eof = fr_eof(fp);
+
+	elen = sizeof(struct ethhdr);
+	hlen = sizeof(struct fcoe_hdr);
+	tlen = sizeof(struct fcoe_crc_eof);
+	wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
+
+	skb->ip_summed = CHECKSUM_NONE;
+	crc = fcoe_fc_crc(fp);
+
+	/* copy port crc and eof to the skb buff */
+	if (skb_is_nonlinear(skb)) {
+		skb_frag_t *frag;
+
+		if (qedf_get_paged_crc_eof(skb, tlen)) {
+			kfree_skb(skb);
+			return -ENOMEM;
+		}
+		frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
+		cp = kmap_atomic(skb_frag_page(frag)) + frag->page_offset;
+	} else {
+		cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
+	}
+
+	memset(cp, 0, sizeof(*cp));
+	cp->fcoe_eof = eof;
+	cp->fcoe_crc32 = cpu_to_le32(~crc);
+	if (skb_is_nonlinear(skb)) {
+		kunmap_atomic(cp);
+		cp = NULL;
+	}
+
+
+	/* adjust skb network/transport offsets to match mac/fcoe/port */
+	skb_push(skb, elen + hlen);
+	skb_reset_mac_header(skb);
+	skb_reset_network_header(skb);
+	skb->mac_len = elen;
+	skb->protocol = htons(ETH_P_FCOE);
+
+	__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), qedf->vlan_id);
+
+	/* fill up mac and fcoe headers */
+	eh = eth_hdr(skb);
+	eh->h_proto = htons(ETH_P_FCOE);
+	if (qedf->ctlr.map_dest)
+		fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
+	else
+		/* insert GW address */
+		ether_addr_copy(eh->h_dest, qedf->ctlr.dest_addr);
+
+	/* Set the source MAC address */
+	fc_fcoe_set_mac(eh->h_source, fh->fh_s_id);
+
+	hp = (struct fcoe_hdr *)(eh + 1);
+	memset(hp, 0, sizeof(*hp));
+	if (FC_FCOE_VER)
+		FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
+	hp->fcoe_sof = sof;
+
+	/*update tx stats */
+	stats = per_cpu_ptr(lport->stats, get_cpu());
+	stats->TxFrames++;
+	stats->TxWords += wlen;
+	put_cpu();
+
+	/* Get VLAN ID from skb for printing purposes */
+	__vlan_hwaccel_get_tag(skb, &vlan_tci);
+
+	/* send down to lld */
+	fr_dev(fp) = lport;
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame send: "
+	    "src=%06x dest=%06x r_ctl=%x type=%x vlan=%04x.\n",
+	    ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, fh->fh_type,
+	    vlan_tci);
+	if (qedf_dump_frames)
+		print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
+		    1, skb->data, skb->len, false);
+	qed_ops->ll2->start_xmit(qedf->cdev, skb);
+
+	return 0;
+}
+
+static int qedf_alloc_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
+{
+	int rval = 0;
+	u32 *pbl;
+	dma_addr_t page;
+	int num_pages;
+
+	/* Calculate appropriate queue and PBL sizes */
+	fcport->sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
+	fcport->sq_mem_size = ALIGN(fcport->sq_mem_size, QEDF_PAGE_SIZE);
+	fcport->sq_pbl_size = (fcport->sq_mem_size / QEDF_PAGE_SIZE) *
+	    sizeof(void *);
+	fcport->sq_pbl_size = fcport->sq_pbl_size + QEDF_PAGE_SIZE;
+
+	fcport->sq = dma_alloc_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
+	    &fcport->sq_dma, GFP_KERNEL);
+	if (!fcport->sq) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send "
+			   "queue.\n");
+		rval = 1;
+		goto out;
+	}
+	memset(fcport->sq, 0, fcport->sq_mem_size);
+
+	fcport->sq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
+	    fcport->sq_pbl_size, &fcport->sq_pbl_dma, GFP_KERNEL);
+	if (!fcport->sq_pbl) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send "
+			   "queue PBL.\n");
+		rval = 1;
+		goto out_free_sq;
+	}
+	memset(fcport->sq_pbl, 0, fcport->sq_pbl_size);
+
+	/* Create PBL */
+	num_pages = fcport->sq_mem_size / QEDF_PAGE_SIZE;
+	page = fcport->sq_dma;
+	pbl = (u32 *)fcport->sq_pbl;
+
+	while (num_pages--) {
+		*pbl = U64_LO(page);
+		pbl++;
+		*pbl = U64_HI(page);
+		pbl++;
+		page += QEDF_PAGE_SIZE;
+	}
+
+	return rval;
+
+out_free_sq:
+	dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size, fcport->sq,
+	    fcport->sq_dma);
+out:
+	return rval;
+}
+
+static void qedf_free_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
+{
+	if (fcport->sq_pbl)
+		dma_free_coherent(&qedf->pdev->dev, fcport->sq_pbl_size,
+		    fcport->sq_pbl, fcport->sq_pbl_dma);
+	if (fcport->sq)
+		dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
+		    fcport->sq, fcport->sq_dma);
+}
+
+static int qedf_offload_connection(struct qedf_ctx *qedf,
+	struct qedf_rport *fcport)
+{
+	struct qed_fcoe_params_offload conn_info;
+	u32 port_id;
+	u8 lport_src_id[3];
+	int rval;
+	uint16_t total_sqe = (fcport->sq_mem_size / sizeof(struct fcoe_wqe));
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offloading connection "
+		   "portid=%06x.\n", fcport->rdata->ids.port_id);
+	rval = qed_ops->acquire_conn(qedf->cdev, &fcport->handle,
+	    &fcport->fw_cid, &fcport->p_doorbell);
+	if (rval) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Could not acquire connection "
+			   "for portid=%06x.\n", fcport->rdata->ids.port_id);
+		rval = 1; /* For some reason qed returns 0 on failure here */
+		goto out;
+	}
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "portid=%06x "
+		   "fw_cid=%08x handle=%d.\n", fcport->rdata->ids.port_id,
+		   fcport->fw_cid, fcport->handle);
+
+	memset(&conn_info, 0, sizeof(struct qed_fcoe_params_offload));
+
+	/* Fill in the offload connection info */
+	conn_info.sq_pbl_addr = fcport->sq_pbl_dma;
+
+	conn_info.sq_curr_page_addr = (dma_addr_t)(*(u64 *)fcport->sq_pbl);
+	conn_info.sq_next_page_addr =
+	    (dma_addr_t)(*(u64 *)(fcport->sq_pbl + 8));
+
+	/* Need to use our FCoE MAC for the offload session */
+	port_id = fc_host_port_id(qedf->lport->host);
+	lport_src_id[2] = (port_id & 0x000000FF);
+	lport_src_id[1] = (port_id & 0x0000FF00) >> 8;
+	lport_src_id[0] = (port_id & 0x00FF0000) >> 16;
+	fc_fcoe_set_mac(conn_info.src_mac, lport_src_id);
+
+	ether_addr_copy(conn_info.dst_mac, qedf->ctlr.dest_addr);
+
+	conn_info.tx_max_fc_pay_len = fcport->rdata->maxframe_size;
+	conn_info.e_d_tov_timer_val = qedf->lport->e_d_tov / 20;
+	conn_info.rec_tov_timer_val = 3; /* I think this is what E3 was */
+	conn_info.rx_max_fc_pay_len = fcport->rdata->maxframe_size;
+
+	/* Set VLAN data */
+	conn_info.vlan_tag = qedf->vlan_id <<
+	    FCOE_CONN_OFFLOAD_RAMROD_DATA_VLAN_ID_SHIFT;
+	conn_info.vlan_tag |=
+	    qedf_default_prio << FCOE_CONN_OFFLOAD_RAMROD_DATA_PRIORITY_SHIFT;
+	conn_info.flags |= (FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_MASK <<
+	    FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_SHIFT);
+
+	/* Set host port source id */
+	port_id = fc_host_port_id(qedf->lport->host);
+	fcport->sid = port_id;
+	conn_info.s_id.addr_hi = (port_id & 0x000000FF);
+	conn_info.s_id.addr_mid = (port_id & 0x0000FF00) >> 8;
+	conn_info.s_id.addr_lo = (port_id & 0x00FF0000) >> 16;
+
+	conn_info.max_conc_seqs_c3 = fcport->rdata->max_seq;
+
+	/* Set remote port destination id */
+	port_id = fcport->rdata->rport->port_id;
+	conn_info.d_id.addr_hi = (port_id & 0x000000FF);
+	conn_info.d_id.addr_mid = (port_id & 0x0000FF00) >> 8;
+	conn_info.d_id.addr_lo = (port_id & 0x00FF0000) >> 16;
+
+	conn_info.def_q_idx = 0; /* Default index for send queue? */
+
+	/* Set FC-TAPE specific flags if needed */
+	if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN,
+		    "Enable CONF, REC for portid=%06x.\n",
+		    fcport->rdata->ids.port_id);
+		conn_info.flags |= 1 <<
+		    FCOE_CONN_OFFLOAD_RAMROD_DATA_B_CONF_REQ_SHIFT;
+		conn_info.flags |=
+		    ((fcport->rdata->sp_features & FC_SP_FT_SEQC) ? 1 : 0) <<
+		    FCOE_CONN_OFFLOAD_RAMROD_DATA_B_REC_VALID_SHIFT;
+	}
+
+	rval = qed_ops->offload_conn(qedf->cdev, fcport->handle, &conn_info);
+	if (rval) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Could not offload connection "
+			   "for portid=%06x.\n", fcport->rdata->ids.port_id);
+		goto out_free_conn;
+	} else
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offload "
+			   "succeeded portid=%06x total_sqe=%d.\n",
+			   fcport->rdata->ids.port_id, total_sqe);
+
+	spin_lock_init(&fcport->rport_lock);
+	atomic_set(&fcport->free_sqes, total_sqe);
+	return 0;
+out_free_conn:
+	qed_ops->release_conn(qedf->cdev, fcport->handle);
+out:
+	return rval;
+}
+
+#define QEDF_TERM_BUFF_SIZE		10
+static void qedf_upload_connection(struct qedf_ctx *qedf,
+	struct qedf_rport *fcport)
+{
+	void *term_params;
+	dma_addr_t term_params_dma;
+
+	/* Term params needs to be a DMA coherent buffer as qed shared the
+	 * physical DMA address with the firmware. The buffer may be used in
+	 * the receive path so we may eventually have to move this.
+	 */
+	term_params = dma_alloc_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE,
+		&term_params_dma, GFP_KERNEL);
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Uploading connection "
+		   "port_id=%06x.\n", fcport->rdata->ids.port_id);
+
+	qed_ops->destroy_conn(qedf->cdev, fcport->handle, term_params_dma);
+	qed_ops->release_conn(qedf->cdev, fcport->handle);
+
+	dma_free_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE, term_params,
+	    term_params_dma);
+}
+
+static void qedf_cleanup_fcport(struct qedf_ctx *qedf,
+	struct qedf_rport *fcport)
+{
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Cleaning up portid=%06x.\n",
+	    fcport->rdata->ids.port_id);
+
+	/* Flush any remaining i/o's before we upload the connection */
+	qedf_flush_active_ios(fcport, -1);
+
+	if (test_and_clear_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))
+		qedf_upload_connection(qedf, fcport);
+	qedf_free_sq(qedf, fcport);
+	fcport->rdata = NULL;
+	fcport->qedf = NULL;
+}
+
+/**
+ * This event_callback is called after successful completion of libfc
+ * initiated target login. qedf can proceed with initiating the session
+ * establishment.
+ */
+static void qedf_rport_event_handler(struct fc_lport *lport,
+				struct fc_rport_priv *rdata,
+				enum fc_rport_event event)
+{
+	struct qedf_ctx *qedf = lport_priv(lport);
+	struct fc_rport *rport = rdata->rport;
+	struct fc_rport_libfc_priv *rp;
+	struct qedf_rport *fcport;
+	u32 port_id;
+	int rval;
+	unsigned long flags;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "event = %d, "
+		   "port_id = 0x%x\n", event, rdata->ids.port_id);
+
+	switch (event) {
+	case RPORT_EV_READY:
+		if (!rport) {
+			QEDF_WARN(&(qedf->dbg_ctx), "rport is NULL.\n");
+			break;
+		}
+
+		rp = rport->dd_data;
+		fcport = (struct qedf_rport *)&rp[1];
+		fcport->qedf = qedf;
+
+		if (atomic_read(&qedf->num_offloads) >= QEDF_MAX_SESSIONS) {
+			QEDF_ERR(&(qedf->dbg_ctx), "Not offloading "
+			    "portid=0x%x as max number of offloaded sessions "
+			    "reached.\n", rdata->ids.port_id);
+			return;
+		}
+
+		/*
+		 * Don't try to offload the session again. Can happen when we
+		 * get an ADISC
+		 */
+		if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
+			QEDF_WARN(&(qedf->dbg_ctx), "Session already "
+				   "offloaded, portid=0x%x.\n",
+				   rdata->ids.port_id);
+			return;
+		}
+
+		if (rport->port_id == FC_FID_DIR_SERV) {
+			/*
+			 * qedf_rport structure doesn't exist for
+			 * directory server.
+			 * We should not come here, as lport will
+			 * take care of fabric login
+			 */
+			QEDF_WARN(&(qedf->dbg_ctx), "rport struct does not "
+			    "exist for dir server port_id=%x\n",
+			    rdata->ids.port_id);
+			break;
+		}
+
+		if (rdata->spp_type != FC_TYPE_FCP) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "Not offlading since since spp type isn't FCP\n");
+			break;
+		}
+		if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "Not FCP target so not offloading\n");
+			break;
+		}
+
+		fcport->rdata = rdata;
+		fcport->rport = rport;
+
+		rval = qedf_alloc_sq(qedf, fcport);
+		if (rval) {
+			qedf_cleanup_fcport(qedf, fcport);
+			break;
+		}
+
+		/* Set device type */
+		if (rdata->flags & FC_RP_FLAGS_RETRY &&
+		    rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET &&
+		    !(rdata->ids.roles & FC_RPORT_ROLE_FCP_INITIATOR)) {
+			fcport->dev_type = QEDF_RPORT_TYPE_TAPE;
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "portid=%06x is a TAPE device.\n",
+			    rdata->ids.port_id);
+		} else {
+			fcport->dev_type = QEDF_RPORT_TYPE_DISK;
+		}
+
+		rval = qedf_offload_connection(qedf, fcport);
+		if (rval) {
+			qedf_cleanup_fcport(qedf, fcport);
+			break;
+		}
+
+		/* Add fcport to list of qedf_ctx list of offloaded ports */
+		spin_lock_irqsave(&qedf->hba_lock, flags);
+		list_add_rcu(&fcport->peers, &qedf->fcports);
+		spin_unlock_irqrestore(&qedf->hba_lock, flags);
+
+		/*
+		 * Set the session ready bit to let everyone know that this
+		 * connection is ready for I/O
+		 */
+		set_bit(QEDF_RPORT_SESSION_READY, &fcport->flags);
+		atomic_inc(&qedf->num_offloads);
+
+		break;
+	case RPORT_EV_LOGO:
+	case RPORT_EV_FAILED:
+	case RPORT_EV_STOP:
+		port_id = rdata->ids.port_id;
+		if (port_id == FC_FID_DIR_SERV)
+			break;
+
+		if (!rport) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "port_id=%x - rport notcreated Yet!!\n", port_id);
+			break;
+		}
+		rp = rport->dd_data;
+		/*
+		 * Perform session upload. Note that rdata->peers is already
+		 * removed from disc->rports list before we get this event.
+		 */
+		fcport = (struct qedf_rport *)&rp[1];
+
+		/* Only free this fcport if it is offloaded already */
+		if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
+			set_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags);
+			qedf_cleanup_fcport(qedf, fcport);
+
+			/*
+			 * Remove fcport to list of qedf_ctx list of offloaded
+			 * ports
+			 */
+			spin_lock_irqsave(&qedf->hba_lock, flags);
+			list_del_rcu(&fcport->peers);
+			spin_unlock_irqrestore(&qedf->hba_lock, flags);
+
+			clear_bit(QEDF_RPORT_UPLOADING_CONNECTION,
+			    &fcport->flags);
+			atomic_dec(&qedf->num_offloads);
+		}
+
+		break;
+
+	case RPORT_EV_NONE:
+		break;
+	}
+}
+
+static void qedf_abort_io(struct fc_lport *lport)
+{
+	/* NO-OP but need to fill in the template */
+}
+
+static void qedf_fcp_cleanup(struct fc_lport *lport)
+{
+	/*
+	 * NO-OP but need to fill in template to prevent a NULL
+	 * function pointer dereference during link down. I/Os
+	 * will be flushed when port is uploaded.
+	 */
+}
+
+static struct libfc_function_template qedf_lport_template = {
+	.frame_send		= qedf_xmit,
+	.fcp_abort_io		= qedf_abort_io,
+	.fcp_cleanup		= qedf_fcp_cleanup,
+	.rport_event_callback	= qedf_rport_event_handler,
+	.elsct_send		= qedf_elsct_send,
+};
+
+static void qedf_fcoe_ctlr_setup(struct qedf_ctx *qedf)
+{
+	fcoe_ctlr_init(&qedf->ctlr, FIP_ST_AUTO);
+
+	qedf->ctlr.send = qedf_fip_send;
+	qedf->ctlr.update_mac = qedf_update_src_mac;
+	qedf->ctlr.get_src_addr = qedf_get_src_mac;
+	ether_addr_copy(qedf->ctlr.ctl_src_addr, qedf->mac);
+}
+
+static int qedf_lport_setup(struct qedf_ctx *qedf)
+{
+	struct fc_lport *lport = qedf->lport;
+
+	lport->link_up = 0;
+	lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
+	lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
+	lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+	    FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
+	lport->boot_time = jiffies;
+	lport->e_d_tov = 2 * 1000;
+	lport->r_a_tov = 10 * 1000;
+
+	/* Set NPIV support */
+	lport->does_npiv = 1;
+	fc_host_max_npiv_vports(lport->host) = QEDF_MAX_NPIV;
+
+	fc_set_wwnn(lport, qedf->wwnn);
+	fc_set_wwpn(lport, qedf->wwpn);
+
+	fcoe_libfc_config(lport, &qedf->ctlr, &qedf_lport_template, 0);
+
+	/* Allocate the exchange manager */
+	fc_exch_mgr_alloc(lport, FC_CLASS_3, qedf->max_scsi_xid + 1,
+	    qedf->max_els_xid, NULL);
+
+	if (fc_lport_init_stats(lport))
+		return -ENOMEM;
+
+	/* Finish lport config */
+	fc_lport_config(lport);
+
+	/* Set max frame size */
+	fc_set_mfs(lport, QEDF_MFS);
+	fc_host_maxframe_size(lport->host) = lport->mfs;
+
+	/* Set default dev_loss_tmo based on module parameter */
+	fc_host_dev_loss_tmo(lport->host) = qedf_dev_loss_tmo;
+
+	/* Set symbolic node name */
+	snprintf(fc_host_symbolic_name(lport->host), 256,
+	    "QLogic %s v%s", QEDF_MODULE_NAME, QEDF_VERSION);
+
+	return 0;
+}
+
+/*
+ * NPIV functions
+ */
+
+static int qedf_vport_libfc_config(struct fc_vport *vport,
+	struct fc_lport *lport)
+{
+	lport->link_up = 0;
+	lport->qfull = 0;
+	lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
+	lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
+	lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+	    FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
+	lport->boot_time = jiffies;
+	lport->e_d_tov = 2 * 1000;
+	lport->r_a_tov = 10 * 1000;
+	lport->does_npiv = 1; /* Temporary until we add NPIV support */
+
+	/* Allocate stats for vport */
+	if (fc_lport_init_stats(lport))
+		return -ENOMEM;
+
+	/* Finish lport config */
+	fc_lport_config(lport);
+
+	/* offload related configuration */
+	lport->crc_offload = 0;
+	lport->seq_offload = 0;
+	lport->lro_enabled = 0;
+	lport->lro_xid = 0;
+	lport->lso_max = 0;
+
+	return 0;
+}
+
+static int qedf_vport_create(struct fc_vport *vport, bool disabled)
+{
+	struct Scsi_Host *shost = vport_to_shost(vport);
+	struct fc_lport *n_port = shost_priv(shost);
+	struct fc_lport *vn_port;
+	struct qedf_ctx *base_qedf = lport_priv(n_port);
+	struct qedf_ctx *vport_qedf;
+
+	char buf[32];
+	int rc = 0;
+
+	rc = fcoe_validate_vport_create(vport);
+	if (rc) {
+		fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
+		QEDF_WARN(&(base_qedf->dbg_ctx), "Failed to create vport, "
+			   "WWPN (0x%s) already exists.\n", buf);
+		goto err1;
+	}
+
+	if (atomic_read(&base_qedf->link_state) != QEDF_LINK_UP) {
+		QEDF_WARN(&(base_qedf->dbg_ctx), "Cannot create vport "
+			   "because link is not up.\n");
+		rc = -EIO;
+		goto err1;
+	}
+
+	vn_port = libfc_vport_create(vport, sizeof(struct qedf_ctx));
+	if (!vn_port) {
+		QEDF_WARN(&(base_qedf->dbg_ctx), "Could not create lport "
+			   "for vport.\n");
+		rc = -ENOMEM;
+		goto err1;
+	}
+
+	fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
+	QEDF_ERR(&(base_qedf->dbg_ctx), "Creating NPIV port, WWPN=%s.\n",
+	    buf);
+
+	/* Copy some fields from base_qedf */
+	vport_qedf = lport_priv(vn_port);
+	memcpy(vport_qedf, base_qedf, sizeof(struct qedf_ctx));
+
+	/* Set qedf data specific to this vport */
+	vport_qedf->lport = vn_port;
+	/* Use same hba_lock as base_qedf */
+	vport_qedf->hba_lock = base_qedf->hba_lock;
+	vport_qedf->pdev = base_qedf->pdev;
+	vport_qedf->cmd_mgr = base_qedf->cmd_mgr;
+	init_completion(&vport_qedf->flogi_compl);
+	INIT_LIST_HEAD(&vport_qedf->fcports);
+
+	rc = qedf_vport_libfc_config(vport, vn_port);
+	if (rc) {
+		QEDF_ERR(&(base_qedf->dbg_ctx), "Could not allocate memory "
+		    "for lport stats.\n");
+		goto err2;
+	}
+
+	fc_set_wwnn(vn_port, vport->node_name);
+	fc_set_wwpn(vn_port, vport->port_name);
+	vport_qedf->wwnn = vn_port->wwnn;
+	vport_qedf->wwpn = vn_port->wwpn;
+
+	vn_port->host->transportt = qedf_fc_vport_transport_template;
+	vn_port->host->can_queue = QEDF_MAX_ELS_XID;
+	vn_port->host->max_lun = qedf_max_lun;
+	vn_port->host->sg_tablesize = QEDF_MAX_BDS_PER_CMD;
+	vn_port->host->max_cmd_len = QEDF_MAX_CDB_LEN;
+
+	rc = scsi_add_host(vn_port->host, &vport->dev);
+	if (rc) {
+		QEDF_WARN(&(base_qedf->dbg_ctx), "Error adding Scsi_Host.\n");
+		goto err2;
+	}
+
+	/* Set default dev_loss_tmo based on module parameter */
+	fc_host_dev_loss_tmo(vn_port->host) = qedf_dev_loss_tmo;
+
+	/* Init libfc stuffs */
+	memcpy(&vn_port->tt, &qedf_lport_template,
+		sizeof(qedf_lport_template));
+	fc_exch_init(vn_port);
+	fc_elsct_init(vn_port);
+	fc_lport_init(vn_port);
+	fc_disc_init(vn_port);
+	fc_disc_config(vn_port, vn_port);
+
+
+	/* Allocate the exchange manager */
+	shost = vport_to_shost(vport);
+	n_port = shost_priv(shost);
+	fc_exch_mgr_list_clone(n_port, vn_port);
+
+	/* Set max frame size */
+	fc_set_mfs(vn_port, QEDF_MFS);
+
+	fc_host_port_type(vn_port->host) = FC_PORTTYPE_UNKNOWN;
+
+	if (disabled) {
+		fc_vport_set_state(vport, FC_VPORT_DISABLED);
+	} else {
+		vn_port->boot_time = jiffies;
+		fc_fabric_login(vn_port);
+		fc_vport_setlink(vn_port);
+	}
+
+	QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_NPIV, "vn_port=%p.\n",
+		   vn_port);
+
+	/* Set up debug context for vport */
+	vport_qedf->dbg_ctx.host_no = vn_port->host->host_no;
+	vport_qedf->dbg_ctx.pdev = base_qedf->pdev;
+
+err2:
+	scsi_host_put(vn_port->host);
+err1:
+	return rc;
+}
+
+static int qedf_vport_destroy(struct fc_vport *vport)
+{
+	struct Scsi_Host *shost = vport_to_shost(vport);
+	struct fc_lport *n_port = shost_priv(shost);
+	struct fc_lport *vn_port = vport->dd_data;
+
+	mutex_lock(&n_port->lp_mutex);
+	list_del(&vn_port->list);
+	mutex_unlock(&n_port->lp_mutex);
+
+	fc_fabric_logoff(vn_port);
+	fc_lport_destroy(vn_port);
+
+	/* Detach from scsi-ml */
+	fc_remove_host(vn_port->host);
+	scsi_remove_host(vn_port->host);
+
+	/*
+	 * Only try to release the exchange manager if the vn_port
+	 * configuration is complete.
+	 */
+	if (vn_port->state == LPORT_ST_READY)
+		fc_exch_mgr_free(vn_port);
+
+	/* Free memory used by statistical counters */
+	fc_lport_free_stats(vn_port);
+
+	/* Release Scsi_Host */
+	if (vn_port->host)
+		scsi_host_put(vn_port->host);
+
+	return 0;
+}
+
+static int qedf_vport_disable(struct fc_vport *vport, bool disable)
+{
+	struct fc_lport *lport = vport->dd_data;
+
+	if (disable) {
+		fc_vport_set_state(vport, FC_VPORT_DISABLED);
+		fc_fabric_logoff(lport);
+	} else {
+		lport->boot_time = jiffies;
+		fc_fabric_login(lport);
+		fc_vport_setlink(lport);
+	}
+	return 0;
+}
+
+/*
+ * During removal we need to wait for all the vports associated with a port
+ * to be destroyed so we avoid a race condition where libfc is still trying
+ * to reap vports while the driver remove function has already reaped the
+ * driver contexts associated with the physical port.
+ */
+static void qedf_wait_for_vport_destroy(struct qedf_ctx *qedf)
+{
+	struct fc_host_attrs *fc_host = shost_to_fc_host(qedf->lport->host);
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
+	    "Entered.\n");
+	while (fc_host->npiv_vports_inuse > 0) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
+		    "Waiting for all vports to be reaped.\n");
+		msleep(1000);
+	}
+}
+
+/**
+ * qedf_fcoe_reset - Resets the fcoe
+ *
+ * @shost: shost the reset is from
+ *
+ * Returns: always 0
+ */
+static int qedf_fcoe_reset(struct Scsi_Host *shost)
+{
+	struct fc_lport *lport = shost_priv(shost);
+
+	fc_fabric_logoff(lport);
+	fc_fabric_login(lport);
+	return 0;
+}
+
+static struct fc_host_statistics *qedf_fc_get_host_stats(struct Scsi_Host
+	*shost)
+{
+	struct fc_host_statistics *qedf_stats;
+	struct fc_lport *lport = shost_priv(shost);
+	struct qedf_ctx *qedf = lport_priv(lport);
+	struct qed_fcoe_stats *fw_fcoe_stats;
+
+	qedf_stats = fc_get_host_stats(shost);
+
+	/* We don't collect offload stats for specific NPIV ports */
+	if (lport->vport)
+		goto out;
+
+	fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
+	if (!fw_fcoe_stats) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
+		    "fw_fcoe_stats.\n");
+		goto out;
+	}
+
+	/* Query firmware for offload stats */
+	qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
+
+	/*
+	 * The expectation is that we add our offload stats to the stats
+	 * being maintained by libfc each time the fc_get_host_status callback
+	 * is invoked. The additions are not carried over for each call to
+	 * the fc_get_host_stats callback.
+	 */
+	qedf_stats->tx_frames += fw_fcoe_stats->fcoe_tx_data_pkt_cnt +
+	    fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt +
+	    fw_fcoe_stats->fcoe_tx_other_pkt_cnt;
+	qedf_stats->rx_frames += fw_fcoe_stats->fcoe_rx_data_pkt_cnt +
+	    fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt +
+	    fw_fcoe_stats->fcoe_rx_other_pkt_cnt;
+	qedf_stats->fcp_input_megabytes +=
+	    do_div(fw_fcoe_stats->fcoe_rx_byte_cnt, 1000000);
+	qedf_stats->fcp_output_megabytes +=
+	    do_div(fw_fcoe_stats->fcoe_tx_byte_cnt, 1000000);
+	qedf_stats->rx_words += fw_fcoe_stats->fcoe_rx_byte_cnt / 4;
+	qedf_stats->tx_words += fw_fcoe_stats->fcoe_tx_byte_cnt / 4;
+	qedf_stats->invalid_crc_count +=
+	    fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt;
+	qedf_stats->dumped_frames =
+	    fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
+	qedf_stats->error_frames +=
+	    fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
+	qedf_stats->fcp_input_requests += qedf->input_requests;
+	qedf_stats->fcp_output_requests += qedf->output_requests;
+	qedf_stats->fcp_control_requests += qedf->control_requests;
+	qedf_stats->fcp_packet_aborts += qedf->packet_aborts;
+	qedf_stats->fcp_frame_alloc_failures += qedf->alloc_failures;
+
+	kfree(fw_fcoe_stats);
+out:
+	return qedf_stats;
+}
+
+static struct fc_function_template qedf_fc_transport_fn = {
+	.show_host_node_name = 1,
+	.show_host_port_name = 1,
+	.show_host_supported_classes = 1,
+	.show_host_supported_fc4s = 1,
+	.show_host_active_fc4s = 1,
+	.show_host_maxframe_size = 1,
+
+	.show_host_port_id = 1,
+	.show_host_supported_speeds = 1,
+	.get_host_speed = fc_get_host_speed,
+	.show_host_speed = 1,
+	.show_host_port_type = 1,
+	.get_host_port_state = fc_get_host_port_state,
+	.show_host_port_state = 1,
+	.show_host_symbolic_name = 1,
+
+	/*
+	 * Tell FC transport to allocate enough space to store the backpointer
+	 * for the associate qedf_rport struct.
+	 */
+	.dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
+				sizeof(struct qedf_rport)),
+	.show_rport_maxframe_size = 1,
+	.show_rport_supported_classes = 1,
+	.show_host_fabric_name = 1,
+	.show_starget_node_name = 1,
+	.show_starget_port_name = 1,
+	.show_starget_port_id = 1,
+	.set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
+	.show_rport_dev_loss_tmo = 1,
+	.get_fc_host_stats = qedf_fc_get_host_stats,
+	.issue_fc_host_lip = qedf_fcoe_reset,
+	.vport_create = qedf_vport_create,
+	.vport_delete = qedf_vport_destroy,
+	.vport_disable = qedf_vport_disable,
+	.bsg_request = fc_lport_bsg_request,
+};
+
+static struct fc_function_template qedf_fc_vport_transport_fn = {
+	.show_host_node_name = 1,
+	.show_host_port_name = 1,
+	.show_host_supported_classes = 1,
+	.show_host_supported_fc4s = 1,
+	.show_host_active_fc4s = 1,
+	.show_host_maxframe_size = 1,
+	.show_host_port_id = 1,
+	.show_host_supported_speeds = 1,
+	.get_host_speed = fc_get_host_speed,
+	.show_host_speed = 1,
+	.show_host_port_type = 1,
+	.get_host_port_state = fc_get_host_port_state,
+	.show_host_port_state = 1,
+	.show_host_symbolic_name = 1,
+	.dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
+				sizeof(struct qedf_rport)),
+	.show_rport_maxframe_size = 1,
+	.show_rport_supported_classes = 1,
+	.show_host_fabric_name = 1,
+	.show_starget_node_name = 1,
+	.show_starget_port_name = 1,
+	.show_starget_port_id = 1,
+	.set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
+	.show_rport_dev_loss_tmo = 1,
+	.get_fc_host_stats = fc_get_host_stats,
+	.issue_fc_host_lip = qedf_fcoe_reset,
+	.bsg_request = fc_lport_bsg_request,
+};
+
+static bool qedf_fp_has_work(struct qedf_fastpath *fp)
+{
+	struct qedf_ctx *qedf = fp->qedf;
+	struct global_queue *que;
+	struct qed_sb_info *sb_info = fp->sb_info;
+	struct status_block *sb = sb_info->sb_virt;
+	u16 prod_idx;
+
+	/* Get the pointer to the global CQ this completion is on */
+	que = qedf->global_queues[fp->sb_id];
+
+	/* Be sure all responses have been written to PI */
+	rmb();
+
+	/* Get the current firmware producer index */
+	prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
+
+	return (que->cq_prod_idx != prod_idx);
+}
+
+/*
+ * Interrupt handler code.
+ */
+
+/* Process completion queue and copy CQE contents for deferred processesing
+ *
+ * Return true if we should wake the I/O thread, false if not.
+ */
+static bool qedf_process_completions(struct qedf_fastpath *fp)
+{
+	struct qedf_ctx *qedf = fp->qedf;
+	struct qed_sb_info *sb_info = fp->sb_info;
+	struct status_block *sb = sb_info->sb_virt;
+	struct global_queue *que;
+	u16 prod_idx;
+	struct fcoe_cqe *cqe;
+	struct qedf_io_work *io_work;
+	int num_handled = 0;
+	unsigned int cpu;
+	struct qedf_ioreq *io_req = NULL;
+	u16 xid;
+	u16 new_cqes;
+	u32 comp_type;
+
+	/* Get the current firmware producer index */
+	prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
+
+	/* Get the pointer to the global CQ this completion is on */
+	que = qedf->global_queues[fp->sb_id];
+
+	/* Calculate the amount of new elements since last processing */
+	new_cqes = (prod_idx >= que->cq_prod_idx) ?
+	    (prod_idx - que->cq_prod_idx) :
+	    0x10000 - que->cq_prod_idx + prod_idx;
+
+	/* Save producer index */
+	que->cq_prod_idx = prod_idx;
+
+	while (new_cqes) {
+		fp->completions++;
+		num_handled++;
+		cqe = &que->cq[que->cq_cons_idx];
+
+		comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
+		    FCOE_CQE_CQE_TYPE_MASK;
+
+		/*
+		 * Process unsolicited CQEs directly in the interrupt handler
+		 * sine we need the fastpath ID
+		 */
+		if (comp_type == FCOE_UNSOLIC_CQE_TYPE) {
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
+			   "Unsolicated CQE.\n");
+			qedf_process_unsol_compl(qedf, fp->sb_id, cqe);
+			/*
+			 * Don't add a work list item.  Increment consumer
+			 * consumer index and move on.
+			 */
+			goto inc_idx;
+		}
+
+		xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
+		io_req = &qedf->cmd_mgr->cmds[xid];
+
+		/*
+		 * Figure out which percpu thread we should queue this I/O
+		 * on.
+		 */
+		if (!io_req)
+			/* If there is not io_req assocated with this CQE
+			 * just queue it on CPU 0
+			 */
+			cpu = 0;
+		else {
+			cpu = io_req->cpu;
+			io_req->int_cpu = smp_processor_id();
+		}
+
+		io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC);
+		if (!io_work) {
+			QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
+				   "work for I/O completion.\n");
+			continue;
+		}
+		memset(io_work, 0, sizeof(struct qedf_io_work));
+
+		INIT_WORK(&io_work->work, qedf_fp_io_handler);
+
+		/* Copy contents of CQE for deferred processing */
+		memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe));
+
+		io_work->qedf = fp->qedf;
+		io_work->fp = NULL; /* Only used for unsolicited frames */
+
+		queue_work_on(cpu, qedf_io_wq, &io_work->work);
+
+inc_idx:
+		que->cq_cons_idx++;
+		if (que->cq_cons_idx == fp->cq_num_entries)
+			que->cq_cons_idx = 0;
+		new_cqes--;
+	}
+
+	return true;
+}
+
+
+/* MSI-X fastpath handler code */
+static irqreturn_t qedf_msix_handler(int irq, void *dev_id)
+{
+	struct qedf_fastpath *fp = dev_id;
+
+	if (!fp) {
+		QEDF_ERR(NULL, "fp is null.\n");
+		return IRQ_HANDLED;
+	}
+	if (!fp->sb_info) {
+		QEDF_ERR(NULL, "fp->sb_info in null.");
+		return IRQ_HANDLED;
+	}
+
+	/*
+	 * Disable interrupts for this status block while we process new
+	 * completions
+	 */
+	qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/);
+
+	while (1) {
+		qedf_process_completions(fp);
+
+		if (qedf_fp_has_work(fp) == 0) {
+			/* Update the sb information */
+			qed_sb_update_sb_idx(fp->sb_info);
+
+			/* Check for more work */
+			rmb();
+
+			if (qedf_fp_has_work(fp) == 0) {
+				/* Re-enable interrupts */
+				qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
+				return IRQ_HANDLED;
+			}
+		}
+	}
+
+	/* Do we ever want to break out of above loop? */
+	return IRQ_HANDLED;
+}
+
+/* simd handler for MSI/INTa */
+static void qedf_simd_int_handler(void *cookie)
+{
+	/* Cookie is qedf_ctx struct */
+	struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
+
+	QEDF_WARN(&(qedf->dbg_ctx), "qedf=%p.\n", qedf);
+}
+
+#define QEDF_SIMD_HANDLER_NUM		0
+static void qedf_sync_free_irqs(struct qedf_ctx *qedf)
+{
+	int i;
+
+	if (qedf->int_info.msix_cnt) {
+		for (i = 0; i < qedf->int_info.used_cnt; i++) {
+			synchronize_irq(qedf->int_info.msix[i].vector);
+			irq_set_affinity_hint(qedf->int_info.msix[i].vector,
+			    NULL);
+			irq_set_affinity_notifier(qedf->int_info.msix[i].vector,
+			    NULL);
+			free_irq(qedf->int_info.msix[i].vector,
+			    &qedf->fp_array[i]);
+		}
+	} else
+		qed_ops->common->simd_handler_clean(qedf->cdev,
+		    QEDF_SIMD_HANDLER_NUM);
+
+	qedf->int_info.used_cnt = 0;
+	qed_ops->common->set_fp_int(qedf->cdev, 0);
+}
+
+static int qedf_request_msix_irq(struct qedf_ctx *qedf)
+{
+	int i, rc, cpu;
+
+	cpu = cpumask_first(cpu_online_mask);
+	for (i = 0; i < qedf->num_queues; i++) {
+		rc = request_irq(qedf->int_info.msix[i].vector,
+		    qedf_msix_handler, 0, "qedf", &qedf->fp_array[i]);
+
+		if (rc) {
+			QEDF_WARN(&(qedf->dbg_ctx), "request_irq failed.\n");
+			qedf_sync_free_irqs(qedf);
+			return rc;
+		}
+
+		qedf->int_info.used_cnt++;
+		rc = irq_set_affinity_hint(qedf->int_info.msix[i].vector,
+		    get_cpu_mask(cpu));
+		cpu = cpumask_next(cpu, cpu_online_mask);
+	}
+
+	return 0;
+}
+
+static int qedf_setup_int(struct qedf_ctx *qedf)
+{
+	int rc = 0;
+
+	/*
+	 * Learn interrupt configuration
+	 */
+	rc = qed_ops->common->set_fp_int(qedf->cdev, num_online_cpus());
+
+	rc  = qed_ops->common->get_fp_int(qedf->cdev, &qedf->int_info);
+	if (rc)
+		return 0;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of msix_cnt = "
+		   "0x%x num of cpus = 0x%x\n", qedf->int_info.msix_cnt,
+		   num_online_cpus());
+
+	if (qedf->int_info.msix_cnt)
+		return qedf_request_msix_irq(qedf);
+
+	qed_ops->common->simd_handler_config(qedf->cdev, &qedf,
+	    QEDF_SIMD_HANDLER_NUM, qedf_simd_int_handler);
+	qedf->int_info.used_cnt = 1;
+
+	return 0;
+}
+
+/* Main function for libfc frame reception */
+static void qedf_recv_frame(struct qedf_ctx *qedf,
+	struct sk_buff *skb)
+{
+	u32 fr_len;
+	struct fc_lport *lport;
+	struct fc_frame_header *fh;
+	struct fcoe_crc_eof crc_eof;
+	struct fc_frame *fp;
+	u8 *mac = NULL;
+	u8 *dest_mac = NULL;
+	struct fcoe_hdr *hp;
+	struct qedf_rport *fcport;
+
+	lport = qedf->lport;
+	if (lport == NULL || lport->state == LPORT_ST_DISABLED) {
+		QEDF_WARN(NULL, "Invalid lport struct or lport disabled.\n");
+		kfree_skb(skb);
+		return;
+	}
+
+	if (skb_is_nonlinear(skb))
+		skb_linearize(skb);
+	mac = eth_hdr(skb)->h_source;
+	dest_mac = eth_hdr(skb)->h_dest;
+
+	/* Pull the header */
+	hp = (struct fcoe_hdr *)skb->data;
+	fh = (struct fc_frame_header *) skb_transport_header(skb);
+	skb_pull(skb, sizeof(struct fcoe_hdr));
+	fr_len = skb->len - sizeof(struct fcoe_crc_eof);
+
+	fp = (struct fc_frame *)skb;
+	fc_frame_init(fp);
+	fr_dev(fp) = lport;
+	fr_sof(fp) = hp->fcoe_sof;
+	if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
+		kfree_skb(skb);
+		return;
+	}
+	fr_eof(fp) = crc_eof.fcoe_eof;
+	fr_crc(fp) = crc_eof.fcoe_crc32;
+	if (pskb_trim(skb, fr_len)) {
+		kfree_skb(skb);
+		return;
+	}
+
+	fh = fc_frame_header_get(fp);
+
+	if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
+	    fh->fh_type == FC_TYPE_FCP) {
+		/* Drop FCP data. We dont this in L2 path */
+		kfree_skb(skb);
+		return;
+	}
+	if (fh->fh_r_ctl == FC_RCTL_ELS_REQ &&
+	    fh->fh_type == FC_TYPE_ELS) {
+		switch (fc_frame_payload_op(fp)) {
+		case ELS_LOGO:
+			if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
+				/* drop non-FIP LOGO */
+				kfree_skb(skb);
+				return;
+			}
+			break;
+		}
+	}
+
+	if (fh->fh_r_ctl == FC_RCTL_BA_ABTS) {
+		/* Drop incoming ABTS */
+		kfree_skb(skb);
+		return;
+	}
+
+	/*
+	 * If a connection is uploading, drop incoming FCoE frames as there
+	 * is a small window where we could try to return a frame while libfc
+	 * is trying to clean things up.
+	 */
+
+	/* Get fcport associated with d_id if it exists */
+	fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
+
+	if (fcport && test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
+	    &fcport->flags)) {
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
+		    "Connection uploading, dropping fp=%p.\n", fp);
+		kfree_skb(skb);
+		return;
+	}
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame receive: "
+	    "skb=%p fp=%p src=%06x dest=%06x r_ctl=%x fh_type=%x.\n", skb, fp,
+	    ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl,
+	    fh->fh_type);
+	if (qedf_dump_frames)
+		print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
+		    1, skb->data, skb->len, false);
+	fc_exch_recv(lport, fp);
+}
+
+static void qedf_ll2_process_skb(struct work_struct *work)
+{
+	struct qedf_skb_work *skb_work =
+	    container_of(work, struct qedf_skb_work, work);
+	struct qedf_ctx *qedf = skb_work->qedf;
+	struct sk_buff *skb = skb_work->skb;
+	struct ethhdr *eh;
+
+	if (!qedf) {
+		QEDF_ERR(NULL, "qedf is NULL\n");
+		goto err_out;
+	}
+
+	eh = (struct ethhdr *)skb->data;
+
+	/* Undo VLAN encapsulation */
+	if (eh->h_proto == htons(ETH_P_8021Q)) {
+		memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
+		eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
+		skb_reset_mac_header(skb);
+	}
+
+	/*
+	 * Process either a FIP frame or FCoE frame based on the
+	 * protocol value.  If it's not either just drop the
+	 * frame.
+	 */
+	if (eh->h_proto == htons(ETH_P_FIP)) {
+		qedf_fip_recv(qedf, skb);
+		goto out;
+	} else if (eh->h_proto == htons(ETH_P_FCOE)) {
+		__skb_pull(skb, ETH_HLEN);
+		qedf_recv_frame(qedf, skb);
+		goto out;
+	} else
+		goto err_out;
+
+err_out:
+	kfree_skb(skb);
+out:
+	kfree(skb_work);
+	return;
+}
+
+static int qedf_ll2_rx(void *cookie, struct sk_buff *skb,
+	u32 arg1, u32 arg2)
+{
+	struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
+	struct qedf_skb_work *skb_work;
+
+	skb_work = kzalloc(sizeof(struct qedf_skb_work), GFP_ATOMIC);
+	if (!skb_work) {
+		QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate skb_work so "
+			   "dropping frame.\n");
+		kfree_skb(skb);
+		return 0;
+	}
+
+	INIT_WORK(&skb_work->work, qedf_ll2_process_skb);
+	skb_work->skb = skb;
+	skb_work->qedf = qedf;
+	queue_work(qedf->ll2_recv_wq, &skb_work->work);
+
+	return 0;
+}
+
+static struct qed_ll2_cb_ops qedf_ll2_cb_ops = {
+	.rx_cb = qedf_ll2_rx,
+	.tx_cb = NULL,
+};
+
+/* Main thread to process I/O completions */
+void qedf_fp_io_handler(struct work_struct *work)
+{
+	struct qedf_io_work *io_work =
+	    container_of(work, struct qedf_io_work, work);
+	u32 comp_type;
+
+	/*
+	 * Deferred part of unsolicited CQE sends
+	 * frame to libfc.
+	 */
+	comp_type = (io_work->cqe.cqe_data >>
+	    FCOE_CQE_CQE_TYPE_SHIFT) &
+	    FCOE_CQE_CQE_TYPE_MASK;
+	if (comp_type == FCOE_UNSOLIC_CQE_TYPE &&
+	    io_work->fp)
+		fc_exch_recv(io_work->qedf->lport, io_work->fp);
+	else
+		qedf_process_cqe(io_work->qedf, &io_work->cqe);
+
+	kfree(io_work);
+}
+
+static int qedf_alloc_and_init_sb(struct qedf_ctx *qedf,
+	struct qed_sb_info *sb_info, u16 sb_id)
+{
+	struct status_block *sb_virt;
+	dma_addr_t sb_phys;
+	int ret;
+
+	sb_virt = dma_alloc_coherent(&qedf->pdev->dev,
+	    sizeof(struct status_block), &sb_phys, GFP_KERNEL);
+
+	if (!sb_virt) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Status block allocation failed "
+			  "for id = %d.\n", sb_id);
+		return -ENOMEM;
+	}
+
+	ret = qed_ops->common->sb_init(qedf->cdev, sb_info, sb_virt, sb_phys,
+	    sb_id, QED_SB_TYPE_STORAGE);
+
+	if (ret) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Status block initialization "
+			  "failed for id = %d.\n", sb_id);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void qedf_free_sb(struct qedf_ctx *qedf, struct qed_sb_info *sb_info)
+{
+	if (sb_info->sb_virt)
+		dma_free_coherent(&qedf->pdev->dev, sizeof(*sb_info->sb_virt),
+		    (void *)sb_info->sb_virt, sb_info->sb_phys);
+}
+
+static void qedf_destroy_sb(struct qedf_ctx *qedf)
+{
+	int id;
+	struct qedf_fastpath *fp = NULL;
+
+	for (id = 0; id < qedf->num_queues; id++) {
+		fp = &(qedf->fp_array[id]);
+		if (fp->sb_id == QEDF_SB_ID_NULL)
+			break;
+		qedf_free_sb(qedf, fp->sb_info);
+		kfree(fp->sb_info);
+	}
+	kfree(qedf->fp_array);
+}
+
+static int qedf_prepare_sb(struct qedf_ctx *qedf)
+{
+	int id;
+	struct qedf_fastpath *fp;
+	int ret;
+
+	qedf->fp_array =
+	    kcalloc(qedf->num_queues, sizeof(struct qedf_fastpath),
+		GFP_KERNEL);
+
+	if (!qedf->fp_array) {
+		QEDF_ERR(&(qedf->dbg_ctx), "fastpath array allocation "
+			  "failed.\n");
+		return -ENOMEM;
+	}
+
+	for (id = 0; id < qedf->num_queues; id++) {
+		fp = &(qedf->fp_array[id]);
+		fp->sb_id = QEDF_SB_ID_NULL;
+		fp->sb_info = kcalloc(1, sizeof(*fp->sb_info), GFP_KERNEL);
+		if (!fp->sb_info) {
+			QEDF_ERR(&(qedf->dbg_ctx), "SB info struct "
+				  "allocation failed.\n");
+			goto err;
+		}
+		ret = qedf_alloc_and_init_sb(qedf, fp->sb_info, id);
+		if (ret) {
+			QEDF_ERR(&(qedf->dbg_ctx), "SB allocation and "
+				  "initialization failed.\n");
+			goto err;
+		}
+		fp->sb_id = id;
+		fp->qedf = qedf;
+		fp->cq_num_entries =
+		    qedf->global_queues[id]->cq_mem_size /
+		    sizeof(struct fcoe_cqe);
+	}
+err:
+	return 0;
+}
+
+void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe)
+{
+	u16 xid;
+	struct qedf_ioreq *io_req;
+	struct qedf_rport *fcport;
+	u32 comp_type;
+
+	comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
+	    FCOE_CQE_CQE_TYPE_MASK;
+
+	xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
+	io_req = &qedf->cmd_mgr->cmds[xid];
+
+	/* Completion not for a valid I/O anymore so just return */
+	if (!io_req)
+		return;
+
+	fcport = io_req->fcport;
+
+	if (fcport == NULL) {
+		QEDF_ERR(&(qedf->dbg_ctx), "fcport is NULL.\n");
+		return;
+	}
+
+	/*
+	 * Check that fcport is offloaded.  If it isn't then the spinlock
+	 * isn't valid and shouldn't be taken. We should just return.
+	 */
+	if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n");
+		return;
+	}
+
+
+	switch (comp_type) {
+	case FCOE_GOOD_COMPLETION_CQE_TYPE:
+		atomic_inc(&fcport->free_sqes);
+		switch (io_req->cmd_type) {
+		case QEDF_SCSI_CMD:
+			qedf_scsi_completion(qedf, cqe, io_req);
+			break;
+		case QEDF_ELS:
+			qedf_process_els_compl(qedf, cqe, io_req);
+			break;
+		case QEDF_TASK_MGMT_CMD:
+			qedf_process_tmf_compl(qedf, cqe, io_req);
+			break;
+		case QEDF_SEQ_CLEANUP:
+			qedf_process_seq_cleanup_compl(qedf, cqe, io_req);
+			break;
+		}
+		break;
+	case FCOE_ERROR_DETECTION_CQE_TYPE:
+		atomic_inc(&fcport->free_sqes);
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Error detect CQE.\n");
+		qedf_process_error_detect(qedf, cqe, io_req);
+		break;
+	case FCOE_EXCH_CLEANUP_CQE_TYPE:
+		atomic_inc(&fcport->free_sqes);
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Cleanup CQE.\n");
+		qedf_process_cleanup_compl(qedf, cqe, io_req);
+		break;
+	case FCOE_ABTS_CQE_TYPE:
+		atomic_inc(&fcport->free_sqes);
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Abort CQE.\n");
+		qedf_process_abts_compl(qedf, cqe, io_req);
+		break;
+	case FCOE_DUMMY_CQE_TYPE:
+		atomic_inc(&fcport->free_sqes);
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Dummy CQE.\n");
+		break;
+	case FCOE_LOCAL_COMP_CQE_TYPE:
+		atomic_inc(&fcport->free_sqes);
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Local completion CQE.\n");
+		break;
+	case FCOE_WARNING_CQE_TYPE:
+		atomic_inc(&fcport->free_sqes);
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Warning CQE.\n");
+		qedf_process_warning_compl(qedf, cqe, io_req);
+		break;
+	case MAX_FCOE_CQE_TYPE:
+		atomic_inc(&fcport->free_sqes);
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Max FCoE CQE.\n");
+		break;
+	default:
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
+		    "Default CQE.\n");
+		break;
+	}
+}
+
+static void qedf_free_bdq(struct qedf_ctx *qedf)
+{
+	int i;
+
+	if (qedf->bdq_pbl_list)
+		dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
+		    qedf->bdq_pbl_list, qedf->bdq_pbl_list_dma);
+
+	if (qedf->bdq_pbl)
+		dma_free_coherent(&qedf->pdev->dev, qedf->bdq_pbl_mem_size,
+		    qedf->bdq_pbl, qedf->bdq_pbl_dma);
+
+	for (i = 0; i < QEDF_BDQ_SIZE; i++) {
+		if (qedf->bdq[i].buf_addr) {
+			dma_free_coherent(&qedf->pdev->dev, QEDF_BDQ_BUF_SIZE,
+			    qedf->bdq[i].buf_addr, qedf->bdq[i].buf_dma);
+		}
+	}
+}
+
+static void qedf_free_global_queues(struct qedf_ctx *qedf)
+{
+	int i;
+	struct global_queue **gl = qedf->global_queues;
+
+	for (i = 0; i < qedf->num_queues; i++) {
+		if (!gl[i])
+			continue;
+
+		if (gl[i]->cq)
+			dma_free_coherent(&qedf->pdev->dev,
+			    gl[i]->cq_mem_size, gl[i]->cq, gl[i]->cq_dma);
+		if (gl[i]->cq_pbl)
+			dma_free_coherent(&qedf->pdev->dev, gl[i]->cq_pbl_size,
+			    gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
+
+		kfree(gl[i]);
+	}
+
+	qedf_free_bdq(qedf);
+}
+
+static int qedf_alloc_bdq(struct qedf_ctx *qedf)
+{
+	int i;
+	struct scsi_bd *pbl;
+	u64 *list;
+	dma_addr_t page;
+
+	/* Alloc dma memory for BDQ buffers */
+	for (i = 0; i < QEDF_BDQ_SIZE; i++) {
+		qedf->bdq[i].buf_addr = dma_alloc_coherent(&qedf->pdev->dev,
+		    QEDF_BDQ_BUF_SIZE, &qedf->bdq[i].buf_dma, GFP_KERNEL);
+		if (!qedf->bdq[i].buf_addr) {
+			QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ "
+			    "buffer %d.\n", i);
+			return -ENOMEM;
+		}
+	}
+
+	/* Alloc dma memory for BDQ page buffer list */
+	qedf->bdq_pbl_mem_size =
+	    QEDF_BDQ_SIZE * sizeof(struct scsi_bd);
+	qedf->bdq_pbl_mem_size =
+	    ALIGN(qedf->bdq_pbl_mem_size, QEDF_PAGE_SIZE);
+
+	qedf->bdq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
+	    qedf->bdq_pbl_mem_size, &qedf->bdq_pbl_dma, GFP_KERNEL);
+	if (!qedf->bdq_pbl) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ PBL.\n");
+		return -ENOMEM;
+	}
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+	    "BDQ PBL addr=0x%p dma=0x%llx.\n", qedf->bdq_pbl,
+	    qedf->bdq_pbl_dma);
+
+	/*
+	 * Populate BDQ PBL with physical and virtual address of individual
+	 * BDQ buffers
+	 */
+	pbl = (struct scsi_bd *)qedf->bdq_pbl;
+	for (i = 0; i < QEDF_BDQ_SIZE; i++) {
+		pbl->address.hi = cpu_to_le32(U64_HI(qedf->bdq[i].buf_dma));
+		pbl->address.lo = cpu_to_le32(U64_LO(qedf->bdq[i].buf_dma));
+		pbl->opaque.hi = 0;
+		/* Opaque lo data is an index into the BDQ array */
+		pbl->opaque.lo = cpu_to_le32(i);
+		pbl++;
+	}
+
+	/* Allocate list of PBL pages */
+	qedf->bdq_pbl_list = dma_alloc_coherent(&qedf->pdev->dev,
+	    QEDF_PAGE_SIZE, &qedf->bdq_pbl_list_dma, GFP_KERNEL);
+	if (!qedf->bdq_pbl_list) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate list of PBL "
+		    "pages.\n");
+		return -ENOMEM;
+	}
+	memset(qedf->bdq_pbl_list, 0, QEDF_PAGE_SIZE);
+
+	/*
+	 * Now populate PBL list with pages that contain pointers to the
+	 * individual buffers.
+	 */
+	qedf->bdq_pbl_list_num_entries = qedf->bdq_pbl_mem_size /
+	    QEDF_PAGE_SIZE;
+	list = (u64 *)qedf->bdq_pbl_list;
+	page = qedf->bdq_pbl_list_dma;
+	for (i = 0; i < qedf->bdq_pbl_list_num_entries; i++) {
+		*list = qedf->bdq_pbl_dma;
+		list++;
+		page += QEDF_PAGE_SIZE;
+	}
+
+	return 0;
+}
+
+static int qedf_alloc_global_queues(struct qedf_ctx *qedf)
+{
+	u32 *list;
+	int i;
+	int status = 0, rc;
+	u32 *pbl;
+	dma_addr_t page;
+	int num_pages;
+
+	/* Allocate and map CQs, RQs */
+	/*
+	 * Number of global queues (CQ / RQ). This should
+	 * be <= number of available MSIX vectors for the PF
+	 */
+	if (!qedf->num_queues) {
+		QEDF_ERR(&(qedf->dbg_ctx), "No MSI-X vectors available!\n");
+		return 1;
+	}
+
+	/*
+	 * Make sure we allocated the PBL that will contain the physical
+	 * addresses of our queues
+	 */
+	if (!qedf->p_cpuq) {
+		status = 1;
+		goto mem_alloc_failure;
+	}
+
+	qedf->global_queues = kzalloc((sizeof(struct global_queue *)
+	    * qedf->num_queues), GFP_KERNEL);
+	if (!qedf->global_queues) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate global "
+			  "queues array ptr memory\n");
+		return -ENOMEM;
+	}
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+		   "qedf->global_queues=%p.\n", qedf->global_queues);
+
+	/* Allocate DMA coherent buffers for BDQ */
+	rc = qedf_alloc_bdq(qedf);
+	if (rc)
+		goto mem_alloc_failure;
+
+	/* Allocate a CQ and an associated PBL for each MSI-X vector */
+	for (i = 0; i < qedf->num_queues; i++) {
+		qedf->global_queues[i] = kzalloc(sizeof(struct global_queue),
+		    GFP_KERNEL);
+		if (!qedf->global_queues[i]) {
+			QEDF_WARN(&(qedf->dbg_ctx), "Unable to allocation "
+				   "global queue %d.\n", i);
+			goto mem_alloc_failure;
+		}
+
+		qedf->global_queues[i]->cq_mem_size =
+		    FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
+		qedf->global_queues[i]->cq_mem_size =
+		    ALIGN(qedf->global_queues[i]->cq_mem_size, QEDF_PAGE_SIZE);
+
+		qedf->global_queues[i]->cq_pbl_size =
+		    (qedf->global_queues[i]->cq_mem_size /
+		    PAGE_SIZE) * sizeof(void *);
+		qedf->global_queues[i]->cq_pbl_size =
+		    ALIGN(qedf->global_queues[i]->cq_pbl_size, QEDF_PAGE_SIZE);
+
+		qedf->global_queues[i]->cq =
+		    dma_alloc_coherent(&qedf->pdev->dev,
+			qedf->global_queues[i]->cq_mem_size,
+			&qedf->global_queues[i]->cq_dma, GFP_KERNEL);
+
+		if (!qedf->global_queues[i]->cq) {
+			QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
+				   "cq.\n");
+			status = -ENOMEM;
+			goto mem_alloc_failure;
+		}
+		memset(qedf->global_queues[i]->cq, 0,
+		    qedf->global_queues[i]->cq_mem_size);
+
+		qedf->global_queues[i]->cq_pbl =
+		    dma_alloc_coherent(&qedf->pdev->dev,
+			qedf->global_queues[i]->cq_pbl_size,
+			&qedf->global_queues[i]->cq_pbl_dma, GFP_KERNEL);
+
+		if (!qedf->global_queues[i]->cq_pbl) {
+			QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
+				   "cq PBL.\n");
+			status = -ENOMEM;
+			goto mem_alloc_failure;
+		}
+		memset(qedf->global_queues[i]->cq_pbl, 0,
+		    qedf->global_queues[i]->cq_pbl_size);
+
+		/* Create PBL */
+		num_pages = qedf->global_queues[i]->cq_mem_size /
+		    QEDF_PAGE_SIZE;
+		page = qedf->global_queues[i]->cq_dma;
+		pbl = (u32 *)qedf->global_queues[i]->cq_pbl;
+
+		while (num_pages--) {
+			*pbl = U64_LO(page);
+			pbl++;
+			*pbl = U64_HI(page);
+			pbl++;
+			page += QEDF_PAGE_SIZE;
+		}
+		/* Set the initial consumer index for cq */
+		qedf->global_queues[i]->cq_cons_idx = 0;
+	}
+
+	list = (u32 *)qedf->p_cpuq;
+
+	/*
+	 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
+	 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
+	 * to the physical address which contains an array of pointers to
+	 * the physical addresses of the specific queue pages.
+	 */
+	for (i = 0; i < qedf->num_queues; i++) {
+		*list = U64_LO(qedf->global_queues[i]->cq_pbl_dma);
+		list++;
+		*list = U64_HI(qedf->global_queues[i]->cq_pbl_dma);
+		list++;
+		*list = U64_LO(0);
+		list++;
+		*list = U64_HI(0);
+		list++;
+	}
+
+	return 0;
+
+mem_alloc_failure:
+	qedf_free_global_queues(qedf);
+	return status;
+}
+
+static int qedf_set_fcoe_pf_param(struct qedf_ctx *qedf)
+{
+	u8 sq_num_pbl_pages;
+	u32 sq_mem_size;
+	u32 cq_mem_size;
+	u32 cq_num_entries;
+	int rval;
+
+	/*
+	 * The number of completion queues/fastpath interrupts/status blocks
+	 * we allocation is the minimum off:
+	 *
+	 * Number of CPUs
+	 * Number of MSI-X vectors
+	 * Max number allocated in hardware (QEDF_MAX_NUM_CQS)
+	 */
+	qedf->num_queues = min((unsigned int)QEDF_MAX_NUM_CQS,
+	    num_online_cpus());
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of CQs is %d.\n",
+		   qedf->num_queues);
+
+	qedf->p_cpuq = pci_alloc_consistent(qedf->pdev,
+	    qedf->num_queues * sizeof(struct qedf_glbl_q_params),
+	    &qedf->hw_p_cpuq);
+
+	if (!qedf->p_cpuq) {
+		QEDF_ERR(&(qedf->dbg_ctx), "pci_alloc_consistent failed.\n");
+		return 1;
+	}
+
+	rval = qedf_alloc_global_queues(qedf);
+	if (rval) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Global queue allocation "
+			  "failed.\n");
+		return 1;
+	}
+
+	/* Calculate SQ PBL size in the same manner as in qedf_sq_alloc() */
+	sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
+	sq_mem_size = ALIGN(sq_mem_size, QEDF_PAGE_SIZE);
+	sq_num_pbl_pages = (sq_mem_size / QEDF_PAGE_SIZE);
+
+	/* Calculate CQ num entries */
+	cq_mem_size = FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
+	cq_mem_size = ALIGN(cq_mem_size, QEDF_PAGE_SIZE);
+	cq_num_entries = cq_mem_size / sizeof(struct fcoe_cqe);
+
+	memset(&(qedf->pf_params), 0,
+	    sizeof(qedf->pf_params));
+
+	/* Setup the value for fcoe PF */
+	qedf->pf_params.fcoe_pf_params.num_cons = QEDF_MAX_SESSIONS;
+	qedf->pf_params.fcoe_pf_params.num_tasks = FCOE_PARAMS_NUM_TASKS;
+	qedf->pf_params.fcoe_pf_params.glbl_q_params_addr =
+	    (u64)qedf->hw_p_cpuq;
+	qedf->pf_params.fcoe_pf_params.sq_num_pbl_pages = sq_num_pbl_pages;
+
+	qedf->pf_params.fcoe_pf_params.rq_buffer_log_size = 0;
+
+	qedf->pf_params.fcoe_pf_params.cq_num_entries = cq_num_entries;
+	qedf->pf_params.fcoe_pf_params.num_cqs = qedf->num_queues;
+
+	/* log_page_size: 12 for 4KB pages */
+	qedf->pf_params.fcoe_pf_params.log_page_size = ilog2(QEDF_PAGE_SIZE);
+
+	qedf->pf_params.fcoe_pf_params.mtu = 9000;
+	qedf->pf_params.fcoe_pf_params.gl_rq_pi = QEDF_FCOE_PARAMS_GL_RQ_PI;
+	qedf->pf_params.fcoe_pf_params.gl_cmd_pi = QEDF_FCOE_PARAMS_GL_CMD_PI;
+
+	/* BDQ address and size */
+	qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0] =
+	    qedf->bdq_pbl_list_dma;
+	qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0] =
+	    qedf->bdq_pbl_list_num_entries;
+	qedf->pf_params.fcoe_pf_params.rq_buffer_size = QEDF_BDQ_BUF_SIZE;
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+	    "bdq_list=%p bdq_pbl_list_dma=%llx bdq_pbl_list_entries=%d.\n",
+	    qedf->bdq_pbl_list,
+	    qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0],
+	    qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0]);
+
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+	    "cq_num_entries=%d.\n",
+	    qedf->pf_params.fcoe_pf_params.cq_num_entries);
+
+	return 0;
+}
+
+/* Free DMA coherent memory for array of queue pointers we pass to qed */
+static void qedf_free_fcoe_pf_param(struct qedf_ctx *qedf)
+{
+	size_t size = 0;
+
+	if (qedf->p_cpuq) {
+		size = qedf->num_queues * sizeof(struct qedf_glbl_q_params);
+		pci_free_consistent(qedf->pdev, size, qedf->p_cpuq,
+		    qedf->hw_p_cpuq);
+	}
+
+	qedf_free_global_queues(qedf);
+
+	if (qedf->global_queues)
+		kfree(qedf->global_queues);
+}
+
+/*
+ * PCI driver functions
+ */
+
+static const struct pci_device_id qedf_pci_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165c) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8080) },
+	{0}
+};
+MODULE_DEVICE_TABLE(pci, qedf_pci_tbl);
+
+static struct pci_driver qedf_pci_driver = {
+	.name = QEDF_MODULE_NAME,
+	.id_table = qedf_pci_tbl,
+	.probe = qedf_probe,
+	.remove = qedf_remove,
+};
+
+static int __qedf_probe(struct pci_dev *pdev, int mode)
+{
+	int rc = -EINVAL;
+	struct fc_lport *lport;
+	struct qedf_ctx *qedf;
+	struct Scsi_Host *host;
+	bool is_vf = false;
+	struct qed_ll2_params params;
+	char host_buf[20];
+	struct qed_link_params link_params;
+	int status;
+	void *task_start, *task_end;
+	struct qed_slowpath_params slowpath_params;
+	struct qed_probe_params qed_params;
+	u16 tmp;
+
+	/*
+	 * When doing error recovery we didn't reap the lport so don't try
+	 * to reallocate it.
+	 */
+	if (mode != QEDF_MODE_RECOVERY) {
+		lport = libfc_host_alloc(&qedf_host_template,
+		    sizeof(struct qedf_ctx));
+
+		if (!lport) {
+			QEDF_ERR(NULL, "Could not allocate lport.\n");
+			rc = -ENOMEM;
+			goto err0;
+		}
+
+		/* Initialize qedf_ctx */
+		qedf = lport_priv(lport);
+		qedf->lport = lport;
+		qedf->ctlr.lp = lport;
+		qedf->pdev = pdev;
+		qedf->dbg_ctx.pdev = pdev;
+		qedf->dbg_ctx.host_no = lport->host->host_no;
+		spin_lock_init(&qedf->hba_lock);
+		INIT_LIST_HEAD(&qedf->fcports);
+		qedf->curr_conn_id = QEDF_MAX_SESSIONS - 1;
+		atomic_set(&qedf->num_offloads, 0);
+		qedf->stop_io_on_error = false;
+		pci_set_drvdata(pdev, qedf);
+
+		QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO,
+		   "QLogic FastLinQ FCoE Module qedf %s, "
+		   "FW %d.%d.%d.%d\n", QEDF_VERSION,
+		   FW_MAJOR_VERSION, FW_MINOR_VERSION, FW_REVISION_VERSION,
+		   FW_ENGINEERING_VERSION);
+	} else {
+		/* Init pointers during recovery */
+		qedf = pci_get_drvdata(pdev);
+		lport = qedf->lport;
+	}
+
+	host = lport->host;
+
+	/* Allocate mempool for qedf_io_work structs */
+	qedf->io_mempool = mempool_create_slab_pool(QEDF_IO_WORK_MIN,
+	    qedf_io_work_cache);
+	if (qedf->io_mempool == NULL) {
+		QEDF_ERR(&(qedf->dbg_ctx), "qedf->io_mempool is NULL.\n");
+		goto err1;
+	}
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO, "qedf->io_mempool=%p.\n",
+	    qedf->io_mempool);
+
+	sprintf(host_buf, "qedf_%u_link",
+	    qedf->lport->host->host_no);
+	qedf->link_update_wq = create_singlethread_workqueue(host_buf);
+	INIT_DELAYED_WORK(&qedf->link_update, qedf_handle_link_update);
+	INIT_DELAYED_WORK(&qedf->link_recovery, qedf_link_recovery);
+
+	qedf->fipvlan_retries = qedf_fipvlan_retries;
+
+	/*
+	 * Common probe. Takes care of basic hardware init and pci_*
+	 * functions.
+	 */
+	memset(&qed_params, 0, sizeof(qed_params));
+	qed_params.protocol = QED_PROTOCOL_FCOE;
+	qed_params.dp_module = qedf_dp_module;
+	qed_params.dp_level = qedf_dp_level;
+	qed_params.is_vf = is_vf;
+	qedf->cdev = qed_ops->common->probe(pdev, &qed_params);
+	if (!qedf->cdev) {
+		rc = -ENODEV;
+		goto err1;
+	}
+
+	/* queue allocation code should come here
+	 * order should be
+	 * 	slowpath_start
+	 * 	status block allocation
+	 *	interrupt registration (to get min number of queues)
+	 *	set_fcoe_pf_param
+	 *	qed_sp_fcoe_func_start
+	 */
+	rc = qedf_set_fcoe_pf_param(qedf);
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Cannot set fcoe pf param.\n");
+		goto err2;
+	}
+	qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
+
+	/* Learn information crucial for qedf to progress */
+	rc = qed_ops->fill_dev_info(qedf->cdev, &qedf->dev_info);
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Failed to dev info.\n");
+		goto err1;
+	}
+
+	/* Record BDQ producer doorbell addresses */
+	qedf->bdq_primary_prod = qedf->dev_info.primary_dbq_rq_addr;
+	qedf->bdq_secondary_prod = qedf->dev_info.secondary_bdq_rq_addr;
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+	    "BDQ primary_prod=%p secondary_prod=%p.\n", qedf->bdq_primary_prod,
+	    qedf->bdq_secondary_prod);
+
+	qed_ops->register_ops(qedf->cdev, &qedf_cb_ops, qedf);
+
+	rc = qedf_prepare_sb(qedf);
+	if (rc) {
+
+		QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
+		goto err2;
+	}
+
+	/* Start the Slowpath-process */
+	slowpath_params.int_mode = QED_INT_MODE_MSIX;
+	slowpath_params.drv_major = QEDF_DRIVER_MAJOR_VER;
+	slowpath_params.drv_minor = QEDF_DRIVER_MINOR_VER;
+	slowpath_params.drv_rev = QEDF_DRIVER_REV_VER;
+	slowpath_params.drv_eng = QEDF_DRIVER_ENG_VER;
+	memcpy(slowpath_params.name, "qedf", QED_DRV_VER_STR_SIZE);
+	rc = qed_ops->common->slowpath_start(qedf->cdev, &slowpath_params);
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
+		goto err2;
+	}
+
+	/*
+	 * update_pf_params needs to be called before and after slowpath
+	 * start
+	 */
+	qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
+
+	/* Setup interrupts */
+	rc = qedf_setup_int(qedf);
+	if (rc)
+		goto err3;
+
+	rc = qed_ops->start(qedf->cdev, &qedf->tasks);
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Cannot start FCoE function.\n");
+		goto err4;
+	}
+	task_start = qedf_get_task_mem(&qedf->tasks, 0);
+	task_end = qedf_get_task_mem(&qedf->tasks, MAX_TID_BLOCKS_FCOE - 1);
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Task context start=%p, "
+		   "end=%p block_size=%u.\n", task_start, task_end,
+		   qedf->tasks.size);
+
+	/*
+	 * We need to write the number of BDs in the BDQ we've preallocated so
+	 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
+	 * packet arrives.
+	 */
+	qedf->bdq_prod_idx = QEDF_BDQ_SIZE;
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+	    "Writing %d to primary and secondary BDQ doorbell registers.\n",
+	    qedf->bdq_prod_idx);
+	writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod);
+	tmp = readw(qedf->bdq_primary_prod);
+	writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod);
+	tmp = readw(qedf->bdq_secondary_prod);
+
+	qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
+
+	/* Now that the dev_info struct has been filled in set the MAC
+	 * address
+	 */
+	ether_addr_copy(qedf->mac, qedf->dev_info.common.hw_mac);
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "MAC address is %pM.\n",
+		   qedf->mac);
+
+	/* Set the WWNN and WWPN based on the MAC address */
+	qedf->wwnn = fcoe_wwn_from_mac(qedf->mac, 1, 0);
+	qedf->wwpn = fcoe_wwn_from_mac(qedf->mac, 2, 0);
+	QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,  "WWNN=%016llx "
+		   "WWPN=%016llx.\n", qedf->wwnn, qedf->wwpn);
+
+	sprintf(host_buf, "host_%d", host->host_no);
+	qed_ops->common->set_id(qedf->cdev, host_buf, QEDF_VERSION);
+
+
+	/* Set xid max values */
+	qedf->max_scsi_xid = QEDF_MAX_SCSI_XID;
+	qedf->max_els_xid = QEDF_MAX_ELS_XID;
+
+	/* Allocate cmd mgr */
+	qedf->cmd_mgr = qedf_cmd_mgr_alloc(qedf);
+	if (!qedf->cmd_mgr) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Failed to allocate cmd mgr.\n");
+		goto err5;
+	}
+
+	if (mode != QEDF_MODE_RECOVERY) {
+		host->transportt = qedf_fc_transport_template;
+		host->can_queue = QEDF_MAX_ELS_XID;
+		host->max_lun = qedf_max_lun;
+		host->max_cmd_len = QEDF_MAX_CDB_LEN;
+		rc = scsi_add_host(host, &pdev->dev);
+		if (rc)
+			goto err6;
+	}
+
+	memset(&params, 0, sizeof(params));
+	params.mtu = 9000;
+	ether_addr_copy(params.ll2_mac_address, qedf->mac);
+
+	/* Start LL2 processing thread */
+	snprintf(host_buf, 20, "qedf_%d_ll2", host->host_no);
+	qedf->ll2_recv_wq =
+		create_singlethread_workqueue(host_buf);
+	if (!qedf->ll2_recv_wq) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Failed to LL2 workqueue.\n");
+		goto err7;
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	qedf_dbg_host_init(&(qedf->dbg_ctx), &qedf_debugfs_ops,
+			    &qedf_dbg_fops);
+#endif
+
+	/* Start LL2 */
+	qed_ops->ll2->register_cb_ops(qedf->cdev, &qedf_ll2_cb_ops, qedf);
+	rc = qed_ops->ll2->start(qedf->cdev, &params);
+	if (rc) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Could not start Light L2.\n");
+		goto err7;
+	}
+	set_bit(QEDF_LL2_STARTED, &qedf->flags);
+
+	/* hw will be insterting vlan tag*/
+	qedf->vlan_hw_insert = 1;
+	qedf->vlan_id = 0;
+
+	/*
+	 * No need to setup fcoe_ctlr or fc_lport objects during recovery since
+	 * they were not reaped during the unload process.
+	 */
+	if (mode != QEDF_MODE_RECOVERY) {
+		/* Setup imbedded fcoe controller */
+		qedf_fcoe_ctlr_setup(qedf);
+
+		/* Setup lport */
+		rc = qedf_lport_setup(qedf);
+		if (rc) {
+			QEDF_ERR(&(qedf->dbg_ctx),
+			    "qedf_lport_setup failed.\n");
+			goto err7;
+		}
+	}
+
+	sprintf(host_buf, "qedf_%u_timer", qedf->lport->host->host_no);
+	qedf->timer_work_queue =
+		create_singlethread_workqueue(host_buf);
+	if (!qedf->timer_work_queue) {
+		QEDF_ERR(&(qedf->dbg_ctx), "Failed to start timer "
+			  "workqueue.\n");
+		goto err7;
+	}
+
+	/* DPC workqueue is not reaped during recovery unload */
+	if (mode != QEDF_MODE_RECOVERY) {
+		sprintf(host_buf, "qedf_%u_dpc",
+		    qedf->lport->host->host_no);
+		qedf->dpc_wq = create_singlethread_workqueue(host_buf);
+	}
+
+	/*
+	 * GRC dump and sysfs parameters are not reaped during the recovery
+	 * unload process.
+	 */
+	if (mode != QEDF_MODE_RECOVERY) {
+		qedf->grcdump_size = qed_ops->common->dbg_grc_size(qedf->cdev);
+		if (qedf->grcdump_size) {
+			rc = qedf_alloc_grc_dump_buf(&qedf->grcdump,
+			    qedf->grcdump_size);
+			if (rc) {
+				QEDF_ERR(&(qedf->dbg_ctx),
+				    "GRC Dump buffer alloc failed.\n");
+				qedf->grcdump = NULL;
+			}
+
+			QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
+			    "grcdump: addr=%p, size=%u.\n",
+			    qedf->grcdump, qedf->grcdump_size);
+		}
+		qedf_create_sysfs_ctx_attr(qedf);
+
+		/* Initialize I/O tracing for this adapter */
+		spin_lock_init(&qedf->io_trace_lock);
+		qedf->io_trace_idx = 0;
+	}
+
+	init_completion(&qedf->flogi_compl);
+
+	memset(&link_params, 0, sizeof(struct qed_link_params));
+	link_params.link_up = true;
+	status = qed_ops->common->set_link(qedf->cdev, &link_params);
+	if (status)
+		QEDF_WARN(&(qedf->dbg_ctx), "set_link failed.\n");
+
+	/* Start/restart discovery */
+	if (mode == QEDF_MODE_RECOVERY)
+		fcoe_ctlr_link_up(&qedf->ctlr);
+	else
+		fc_fabric_login(lport);
+
+	/* All good */
+	return 0;
+
+err7:
+	if (qedf->ll2_recv_wq)
+		destroy_workqueue(qedf->ll2_recv_wq);
+	fc_remove_host(qedf->lport->host);
+	scsi_remove_host(qedf->lport->host);
+#ifdef CONFIG_DEBUG_FS
+	qedf_dbg_host_exit(&(qedf->dbg_ctx));
+#endif
+err6:
+	qedf_cmd_mgr_free(qedf->cmd_mgr);
+err5:
+	qed_ops->stop(qedf->cdev);
+err4:
+	qedf_free_fcoe_pf_param(qedf);
+	qedf_sync_free_irqs(qedf);
+err3:
+	qed_ops->common->slowpath_stop(qedf->cdev);
+err2:
+	qed_ops->common->remove(qedf->cdev);
+err1:
+	scsi_host_put(lport->host);
+err0:
+	return rc;
+}
+
+static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	return __qedf_probe(pdev, QEDF_MODE_NORMAL);
+}
+
+static void __qedf_remove(struct pci_dev *pdev, int mode)
+{
+	struct qedf_ctx *qedf;
+
+	if (!pdev) {
+		QEDF_ERR(NULL, "pdev is NULL.\n");
+		return;
+	}
+
+	qedf = pci_get_drvdata(pdev);
+
+	/*
+	 * Prevent race where we're in board disable work and then try to
+	 * rmmod the module.
+	 */
+	if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
+		QEDF_ERR(&qedf->dbg_ctx, "Already removing PCI function.\n");
+		return;
+	}
+
+	if (mode != QEDF_MODE_RECOVERY)
+		set_bit(QEDF_UNLOADING, &qedf->flags);
+
+	/* Logoff the fabric to upload all connections */
+	if (mode == QEDF_MODE_RECOVERY)
+		fcoe_ctlr_link_down(&qedf->ctlr);
+	else
+		fc_fabric_logoff(qedf->lport);
+	qedf_wait_for_upload(qedf);
+
+#ifdef CONFIG_DEBUG_FS
+	qedf_dbg_host_exit(&(qedf->dbg_ctx));
+#endif
+
+	/* Stop any link update handling */
+	cancel_delayed_work_sync(&qedf->link_update);
+	destroy_workqueue(qedf->link_update_wq);
+	qedf->link_update_wq = NULL;
+
+	if (qedf->timer_work_queue)
+		destroy_workqueue(qedf->timer_work_queue);
+
+	/* Stop Light L2 */
+	clear_bit(QEDF_LL2_STARTED, &qedf->flags);
+	qed_ops->ll2->stop(qedf->cdev);
+	if (qedf->ll2_recv_wq)
+		destroy_workqueue(qedf->ll2_recv_wq);
+
+	/* Stop fastpath */
+	qedf_sync_free_irqs(qedf);
+	qedf_destroy_sb(qedf);
+
+	/*
+	 * During recovery don't destroy OS constructs that represent the
+	 * physical port.
+	 */
+	if (mode != QEDF_MODE_RECOVERY) {
+		qedf_free_grc_dump_buf(&qedf->grcdump);
+		qedf_remove_sysfs_ctx_attr(qedf);
+
+		/* Remove all SCSI/libfc/libfcoe structures */
+		fcoe_ctlr_destroy(&qedf->ctlr);
+		fc_lport_destroy(qedf->lport);
+		fc_remove_host(qedf->lport->host);
+		scsi_remove_host(qedf->lport->host);
+	}
+
+	qedf_cmd_mgr_free(qedf->cmd_mgr);
+
+	if (mode != QEDF_MODE_RECOVERY) {
+		fc_exch_mgr_free(qedf->lport);
+		fc_lport_free_stats(qedf->lport);
+
+		/* Wait for all vports to be reaped */
+		qedf_wait_for_vport_destroy(qedf);
+	}
+
+	/*
+	 * Now that all connections have been uploaded we can stop the
+	 * rest of the qed operations
+	 */
+	qed_ops->stop(qedf->cdev);
+
+	if (mode != QEDF_MODE_RECOVERY) {
+		if (qedf->dpc_wq) {
+			/* Stop general DPC handling */
+			destroy_workqueue(qedf->dpc_wq);
+			qedf->dpc_wq = NULL;
+		}
+	}
+
+	/* Final shutdown for the board */
+	qedf_free_fcoe_pf_param(qedf);
+	if (mode != QEDF_MODE_RECOVERY) {
+		qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
+		pci_set_drvdata(pdev, NULL);
+	}
+	qed_ops->common->slowpath_stop(qedf->cdev);
+	qed_ops->common->remove(qedf->cdev);
+
+	mempool_destroy(qedf->io_mempool);
+
+	/* Only reap the Scsi_host on a real removal */
+	if (mode != QEDF_MODE_RECOVERY)
+		scsi_host_put(qedf->lport->host);
+}
+
+static void qedf_remove(struct pci_dev *pdev)
+{
+	/* Check to make sure this function wasn't already disabled */
+	if (!atomic_read(&pdev->enable_cnt))
+		return;
+
+	__qedf_remove(pdev, QEDF_MODE_NORMAL);
+}
+
+/*
+ * Module Init/Remove
+ */
+
+static int __init qedf_init(void)
+{
+	int ret;
+
+	/* If debug=1 passed, set the default log mask */
+	if (qedf_debug == QEDF_LOG_DEFAULT)
+		qedf_debug = QEDF_DEFAULT_LOG_MASK;
+
+	/* Print driver banner */
+	QEDF_INFO(NULL, QEDF_LOG_INFO, "%s v%s.\n", QEDF_DESCR,
+		   QEDF_VERSION);
+
+	/* Create kmem_cache for qedf_io_work structs */
+	qedf_io_work_cache = kmem_cache_create("qedf_io_work_cache",
+	    sizeof(struct qedf_io_work), 0, SLAB_HWCACHE_ALIGN, NULL);
+	if (qedf_io_work_cache == NULL) {
+		QEDF_ERR(NULL, "qedf_io_work_cache is NULL.\n");
+		goto err1;
+	}
+	QEDF_INFO(NULL, QEDF_LOG_DISC, "qedf_io_work_cache=%p.\n",
+	    qedf_io_work_cache);
+
+	qed_ops = qed_get_fcoe_ops();
+	if (!qed_ops) {
+		QEDF_ERR(NULL, "Failed to get qed fcoe operations\n");
+		goto err1;
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	qedf_dbg_init("qedf");
+#endif
+
+	qedf_fc_transport_template =
+	    fc_attach_transport(&qedf_fc_transport_fn);
+	if (!qedf_fc_transport_template) {
+		QEDF_ERR(NULL, "Could not register with FC transport\n");
+		goto err2;
+	}
+
+	qedf_fc_vport_transport_template =
+		fc_attach_transport(&qedf_fc_vport_transport_fn);
+	if (!qedf_fc_vport_transport_template) {
+		QEDF_ERR(NULL, "Could not register vport template with FC "
+			  "transport\n");
+		goto err3;
+	}
+
+	qedf_io_wq = create_workqueue("qedf_io_wq");
+	if (!qedf_io_wq) {
+		QEDF_ERR(NULL, "Could not create qedf_io_wq.\n");
+		goto err4;
+	}
+
+	qedf_cb_ops.get_login_failures = qedf_get_login_failures;
+
+	ret = pci_register_driver(&qedf_pci_driver);
+	if (ret) {
+		QEDF_ERR(NULL, "Failed to register driver\n");
+		goto err5;
+	}
+
+	return 0;
+
+err5:
+	destroy_workqueue(qedf_io_wq);
+err4:
+	fc_release_transport(qedf_fc_vport_transport_template);
+err3:
+	fc_release_transport(qedf_fc_transport_template);
+err2:
+#ifdef CONFIG_DEBUG_FS
+	qedf_dbg_exit();
+#endif
+	qed_put_fcoe_ops();
+err1:
+	return -EINVAL;
+}
+
+static void __exit qedf_cleanup(void)
+{
+	pci_unregister_driver(&qedf_pci_driver);
+
+	destroy_workqueue(qedf_io_wq);
+
+	fc_release_transport(qedf_fc_vport_transport_template);
+	fc_release_transport(qedf_fc_transport_template);
+#ifdef CONFIG_DEBUG_FS
+	qedf_dbg_exit();
+#endif
+	qed_put_fcoe_ops();
+
+	kmem_cache_destroy(qedf_io_work_cache);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("QLogic QEDF 25/40/50/100Gb FCoE Driver");
+MODULE_AUTHOR("QLogic Corporation");
+MODULE_VERSION(QEDF_VERSION);
+module_init(qedf_init);
+module_exit(qedf_cleanup);

drivers/scsi/qedf/qedf_version.h

+/*
+ *  QLogic FCoE Offload Driver
+ *  Copyright (c) 2016 Cavium Inc.
+ *
+ *  This software is available under the terms of the GNU General Public License
+ *  (GPL) Version 2, available from the file COPYING in the main directory of
+ *  this source tree.
+ */
+
+#define QEDF_VERSION		"8.10.7.0"
+#define QEDF_DRIVER_MAJOR_VER		8
+#define QEDF_DRIVER_MINOR_VER		10
+#define QEDF_DRIVER_REV_VER		7
+#define QEDF_DRIVER_ENG_VER		0
+