scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.

The QLogic FastLinQ Driver for iSCSI (qedi) is the iSCSI specific module
for 41000 Series Converged Network Adapters by QLogic.

This patch consists of following changes:

  - MAINTAINERS Makefile and Kconfig changes for qedi,
  - PCI driver registration,
  - iSCSI host level initialization,
  - Debugfs and log level infrastructure.

The following indiviual changes are merged into this commit:

  qedi: Add LL2 iSCSI interface for offload iSCSI.
  qedi: Add support for iSCSI session management.
  qedi: Add support for data path.
Signed-off-by: NNilesh Javali <nilesh.javali@cavium.com>
Signed-off-by: NAdheer Chandravanshi <adheer.chandravanshi@qlogic.com>
Signed-off-by: NChad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: NSaurav Kashyap <saurav.kashyap@cavium.com>
Signed-off-by: NArun Easi <arun.easi@cavium.com>
Signed-off-by: NManish Rangankar <manish.rangankar@cavium.com>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: NHannes Reinecke <hare@suse.de>
Reviewed-by: NMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

MAINTAINERS

@@ -10079,6 +10079,12 @@ F:	drivers/net/ethernet/qlogic/qed/
 F:	include/linux/qed/
 F:	drivers/net/ethernet/qlogic/qede/
 
+QLOGIC QL41xxx ISCSI DRIVER
+M:	QLogic-Storage-Upstream@cavium.com
+L:	linux-scsi@vger.kernel.org
+S:	Supported
+F:	drivers/scsi/qedi/
+
 QNX4 FILESYSTEM
 M:	Anders Larsen <al@alarsen.net>
 W:	http://www.alarsen.net/linux/qnx4fs/

drivers/scsi/Kconfig

@@ -1233,6 +1233,7 @@ config SCSI_QLOGICPTI
 
 source "drivers/scsi/qla2xxx/Kconfig"
 source "drivers/scsi/qla4xxx/Kconfig"
+source "drivers/scsi/qedi/Kconfig"
 
 config SCSI_LPFC
 	tristate "Emulex LightPulse Fibre Channel Support"

drivers/scsi/Makefile

@@ -131,6 +131,7 @@ obj-$(CONFIG_PS3_ROM)		+= ps3rom.o
 obj-$(CONFIG_SCSI_CXGB3_ISCSI)	+= libiscsi.o libiscsi_tcp.o cxgbi/
 obj-$(CONFIG_SCSI_CXGB4_ISCSI)	+= libiscsi.o libiscsi_tcp.o cxgbi/
 obj-$(CONFIG_SCSI_BNX2_ISCSI)	+= libiscsi.o bnx2i/
+obj-$(CONFIG_QEDI)          += libiscsi.o qedi/
 obj-$(CONFIG_BE2ISCSI)		+= libiscsi.o be2iscsi/
 obj-$(CONFIG_SCSI_ESAS2R)	+= esas2r/
 obj-$(CONFIG_SCSI_PMCRAID)	+= pmcraid.o

drivers/scsi/qedi/Kconfig

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

drivers/scsi/qedi/Makefile

+obj-$(CONFIG_QEDI) := qedi.o
+qedi-y := qedi_main.o qedi_iscsi.o qedi_fw.o qedi_sysfs.o \
+	    qedi_dbg.o
+
+qedi-$(CONFIG_DEBUG_FS) += qedi_debugfs.o

drivers/scsi/qedi/qedi.h

+/*
+ * QLogic iSCSI 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 _QEDI_H_
+#define _QEDI_H_
+
+#define __PREVENT_QED_HSI__
+
+#include <scsi/scsi_transport_iscsi.h>
+#include <scsi/libiscsi.h>
+#include <scsi/scsi_host.h>
+#include <linux/uio_driver.h>
+
+#include "qedi_hsi.h"
+#include <linux/qed/qed_if.h>
+#include "qedi_dbg.h"
+#include <linux/qed/qed_iscsi_if.h>
+#include <linux/qed/qed_ll2_if.h>
+#include "qedi_version.h"
+
+#define QEDI_MODULE_NAME		"qedi"
+
+struct qedi_endpoint;
+
+/*
+ * PCI function probe defines
+ */
+#define QEDI_MODE_NORMAL	0
+#define QEDI_MODE_RECOVERY	1
+
+#define ISCSI_WQE_SET_PTU_INVALIDATE	1
+#define QEDI_MAX_ISCSI_TASK		4096
+#define QEDI_MAX_TASK_NUM		0x0FFF
+#define QEDI_MAX_ISCSI_CONNS_PER_HBA	1024
+#define QEDI_ISCSI_MAX_BDS_PER_CMD	256	/* Firmware max BDs is 256 */
+#define MAX_OUSTANDING_TASKS_PER_CON	1024
+
+#define QEDI_MAX_BD_LEN		0xffff
+#define QEDI_BD_SPLIT_SZ	0x1000
+#define QEDI_PAGE_SIZE		4096
+#define QEDI_FAST_SGE_COUNT	4
+/* MAX Length for cached SGL */
+#define MAX_SGLEN_FOR_CACHESGL	((1U << 16) - 1)
+
+#define MAX_NUM_MSIX_PF         8
+#define MIN_NUM_CPUS_MSIX(x)	min((x)->msix_count, num_online_cpus())
+
+#define QEDI_LOCAL_PORT_MIN     60000
+#define QEDI_LOCAL_PORT_MAX     61024
+#define QEDI_LOCAL_PORT_RANGE   (QEDI_LOCAL_PORT_MAX - QEDI_LOCAL_PORT_MIN)
+#define QEDI_LOCAL_PORT_INVALID	0xffff
+#define TX_RX_RING		16
+#define RX_RING			(TX_RX_RING - 1)
+#define LL2_SINGLE_BUF_SIZE	0x400
+#define QEDI_PAGE_SIZE		4096
+#define QEDI_PAGE_ALIGN(addr)	ALIGN(addr, QEDI_PAGE_SIZE)
+#define QEDI_PAGE_MASK		(~((QEDI_PAGE_SIZE) - 1))
+
+#define QEDI_PAGE_SIZE		4096
+#define QEDI_PATH_HANDLE	0xFE0000000UL
+
+struct qedi_uio_ctrl {
+	/* meta data */
+	u32 uio_hsi_version;
+
+	/* user writes */
+	u32 host_tx_prod;
+	u32 host_rx_cons;
+	u32 host_rx_bd_cons;
+	u32 host_tx_pkt_len;
+	u32 host_rx_cons_cnt;
+
+	/* driver writes */
+	u32 hw_tx_cons;
+	u32 hw_rx_prod;
+	u32 hw_rx_bd_prod;
+	u32 hw_rx_prod_cnt;
+
+	/* other */
+	u8 mac_addr[6];
+	u8 reserve[2];
+};
+
+struct qedi_rx_bd {
+	u32 rx_pkt_index;
+	u32 rx_pkt_len;
+	u16 vlan_id;
+};
+
+#define QEDI_RX_DESC_CNT	(QEDI_PAGE_SIZE / sizeof(struct qedi_rx_bd))
+#define QEDI_MAX_RX_DESC_CNT	(QEDI_RX_DESC_CNT - 1)
+#define QEDI_NUM_RX_BD		(QEDI_RX_DESC_CNT * 1)
+#define QEDI_MAX_RX_BD		(QEDI_NUM_RX_BD - 1)
+
+#define QEDI_NEXT_RX_IDX(x)	((((x) & (QEDI_MAX_RX_DESC_CNT)) ==	\
+				  (QEDI_MAX_RX_DESC_CNT - 1)) ?		\
+				 (x) + 2 : (x) + 1)
+
+struct qedi_uio_dev {
+	struct uio_info		qedi_uinfo;
+	u32			uio_dev;
+	struct list_head	list;
+
+	u32			ll2_ring_size;
+	void			*ll2_ring;
+
+	u32			ll2_buf_size;
+	void			*ll2_buf;
+
+	void			*rx_pkt;
+	void			*tx_pkt;
+
+	struct qedi_ctx		*qedi;
+	struct pci_dev		*pdev;
+	void			*uctrl;
+};
+
+/* List to maintain the skb pointers */
+struct skb_work_list {
+	struct list_head list;
+	struct sk_buff *skb;
+	u16 vlan_id;
+};
+
+/* Queue sizes in number of elements */
+#define QEDI_SQ_SIZE		MAX_OUSTANDING_TASKS_PER_CON
+#define QEDI_CQ_SIZE		2048
+#define QEDI_CMDQ_SIZE		QEDI_MAX_ISCSI_TASK
+#define QEDI_PROTO_CQ_PROD_IDX	0
+
+struct qedi_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 {
+	union iscsi_cqe *cq;
+	dma_addr_t cq_dma;
+	u32 cq_mem_size;
+	u32 cq_cons_idx; /* Completion queue consumer index */
+
+	void *cq_pbl;
+	dma_addr_t cq_pbl_dma;
+	u32 cq_pbl_size;
+
+};
+
+struct qedi_fastpath {
+	struct qed_sb_info	*sb_info;
+	u16			sb_id;
+#define QEDI_NAME_SIZE		16
+	char			name[QEDI_NAME_SIZE];
+	struct qedi_ctx         *qedi;
+};
+
+/* Used to pass fastpath information needed to process CQEs */
+struct qedi_io_work {
+	struct list_head list;
+	struct iscsi_cqe_solicited cqe;
+	u16	que_idx;
+};
+
+/**
+ * struct iscsi_cid_queue - Per adapter iscsi cid queue
+ *
+ * @cid_que_base:           queue base memory
+ * @cid_que:                queue memory pointer
+ * @cid_q_prod_idx:         produce index
+ * @cid_q_cons_idx:         consumer index
+ * @cid_q_max_idx:          max index. used to detect wrap around condition
+ * @cid_free_cnt:           queue size
+ * @conn_cid_tbl:           iscsi cid to conn structure mapping table
+ *
+ * Per adapter iSCSI CID Queue
+ */
+struct iscsi_cid_queue {
+	void *cid_que_base;
+	u32 *cid_que;
+	u32 cid_q_prod_idx;
+	u32 cid_q_cons_idx;
+	u32 cid_q_max_idx;
+	u32 cid_free_cnt;
+	struct qedi_conn **conn_cid_tbl;
+};
+
+struct qedi_portid_tbl {
+	spinlock_t      lock;	/* Port id lock */
+	u16             start;
+	u16             max;
+	u16             next;
+	unsigned long   *table;
+};
+
+struct qedi_itt_map {
+	__le32	itt;
+	struct qedi_cmd *p_cmd;
+};
+
+/* I/O tracing entry */
+#define QEDI_IO_TRACE_SIZE             2048
+struct qedi_io_log {
+#define QEDI_IO_TRACE_REQ              0
+#define QEDI_IO_TRACE_RSP              1
+	u8 direction;
+	u16 task_id;
+	u32 cid;
+	u32 port_id;	/* Remote port fabric ID */
+	int lun;
+	u8 op;		/* SCSI CDB */
+	u8 lba[4];
+	unsigned int bufflen;	/* SCSI buffer length */
+	unsigned int sg_count;	/* Number of SG elements */
+	u8 fast_sgs;		/* number of fast sgls */
+	u8 slow_sgs;		/* number of slow sgls */
+	u8 cached_sgs;		/* number of cached sgls */
+	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 blk_req_cpu; /* CPU that the task is queued on by
+				   * blk layer
+				   */
+	unsigned int req_cpu;	/* CPU that the task is queued on */
+	unsigned int intr_cpu;	/* Interrupt CPU that the task is received on */
+	unsigned int blk_rsp_cpu;/* CPU that task is actually processed and
+				  * returned to blk layer
+				  */
+	bool cached_sge;
+	bool slow_sge;
+	bool fast_sge;
+};
+
+/* Number of entries in BDQ */
+#define QEDI_BDQ_NUM		256
+#define QEDI_BDQ_BUF_SIZE	256
+
+/* DMA coherent buffers for BDQ */
+struct qedi_bdq_buf {
+	void *buf_addr;
+	dma_addr_t buf_dma;
+};
+
+/* Main port level struct */
+struct qedi_ctx {
+	struct qedi_dbg_ctx dbg_ctx;
+	struct Scsi_Host *shost;
+	struct pci_dev *pdev;
+	struct qed_dev *cdev;
+	struct qed_dev_iscsi_info dev_info;
+	struct qed_int_info int_info;
+	struct qedi_glbl_q_params *p_cpuq;
+	struct global_queue **global_queues;
+	/* uio declaration */
+	struct qedi_uio_dev *udev;
+	struct list_head ll2_skb_list;
+	spinlock_t ll2_lock;	/* Light L2 lock */
+	spinlock_t hba_lock;	/* per port lock */
+	struct task_struct *ll2_recv_thread;
+	unsigned long flags;
+#define UIO_DEV_OPENED		1
+#define QEDI_IOTHREAD_WAKE	2
+#define QEDI_IN_RECOVERY	5
+#define QEDI_IN_OFFLINE		6
+
+	u8 mac[ETH_ALEN];
+	u32 src_ip[4];
+	u8 ip_type;
+
+	/* Physical address of above array */
+	dma_addr_t hw_p_cpuq;
+
+	struct qedi_bdq_buf bdq[QEDI_BDQ_NUM];
+	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;
+	u16 bdq_prod_idx;
+	u16 rq_num_entries;
+
+	u32 msix_count;
+	u32 max_sqes;
+	u8 num_queues;
+	u32 max_active_conns;
+
+	struct iscsi_cid_queue cid_que;
+	struct qedi_endpoint **ep_tbl;
+	struct qedi_portid_tbl lcl_port_tbl;
+
+	/* Rx fast path intr context */
+	struct qed_sb_info	*sb_array;
+	struct qedi_fastpath	*fp_array;
+	struct qed_iscsi_tid	tasks;
+
+#define QEDI_LINK_DOWN		0
+#define QEDI_LINK_UP		1
+	atomic_t link_state;
+
+#define QEDI_RESERVE_TASK_ID	0
+#define MAX_ISCSI_TASK_ENTRIES	4096
+#define QEDI_INVALID_TASK_ID	(MAX_ISCSI_TASK_ENTRIES + 1)
+	unsigned long task_idx_map[MAX_ISCSI_TASK_ENTRIES / BITS_PER_LONG];
+	struct qedi_itt_map *itt_map;
+	u16 tid_reuse_count[QEDI_MAX_ISCSI_TASK];
+	struct qed_pf_params pf_params;
+
+	struct workqueue_struct *tmf_thread;
+	struct workqueue_struct *offload_thread;
+
+	u16 ll2_mtu;
+
+	struct workqueue_struct *dpc_wq;
+
+	spinlock_t task_idx_lock;	/* To protect gbl context */
+	s32 last_tidx_alloc;
+	s32 last_tidx_clear;
+
+	struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE];
+	spinlock_t io_trace_lock;	/* prtect trace Log buf */
+	u16 io_trace_idx;
+	unsigned int intr_cpu;
+	u32 cached_sgls;
+	bool use_cached_sge;
+	u32 slow_sgls;
+	bool use_slow_sge;
+	u32 fast_sgls;
+	bool use_fast_sge;
+
+	atomic_t num_offloads;
+};
+
+struct qedi_work {
+	struct list_head list;
+	struct qedi_ctx *qedi;
+	union iscsi_cqe cqe;
+	u16     que_idx;
+	bool is_solicited;
+};
+
+struct qedi_percpu_s {
+	struct task_struct *iothread;
+	struct list_head work_list;
+	spinlock_t p_work_lock;		/* Per cpu worker lock */
+};
+
+static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid)
+{
+	return (info->blocks[tid / info->num_tids_per_block] +
+		(tid % info->num_tids_per_block) * info->size);
+}
+
+#define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32))
+#define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
+
+#endif /* _QEDI_H_ */

drivers/scsi/qedi/qedi_dbg.c

+/*
+ * QLogic iSCSI 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 "qedi_dbg.h"
+#include <linux/vmalloc.h>
+
+void
+qedi_dbg_err(struct qedi_dbg_ctx *qedi, 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(qedi) && likely(qedi->pdev))
+		pr_err("[%s]:[%s:%d]:%d: %pV", dev_name(&qedi->pdev->dev),
+		       nfunc, line, qedi->host_no, &vaf);
+	else
+		pr_err("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+	va_end(va);
+}
+
+void
+qedi_dbg_warn(struct qedi_dbg_ctx *qedi, 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 (!(qedi_dbg_log & QEDI_LOG_WARN))
+		return;
+
+	if (likely(qedi) && likely(qedi->pdev))
+		pr_warn("[%s]:[%s:%d]:%d: %pV", dev_name(&qedi->pdev->dev),
+			nfunc, line, qedi->host_no, &vaf);
+	else
+		pr_warn("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+	va_end(va);
+}
+
+void
+qedi_dbg_notice(struct qedi_dbg_ctx *qedi, 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 (!(qedi_dbg_log & QEDI_LOG_NOTICE))
+		return;
+
+	if (likely(qedi) && likely(qedi->pdev))
+		pr_notice("[%s]:[%s:%d]:%d: %pV",
+			  dev_name(&qedi->pdev->dev), nfunc, line,
+			  qedi->host_no, &vaf);
+	else
+		pr_notice("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+	va_end(va);
+}
+
+void
+qedi_dbg_info(struct qedi_dbg_ctx *qedi, 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 (!(qedi_dbg_log & level))
+		return;
+
+	if (likely(qedi) && likely(qedi->pdev))
+		pr_info("[%s]:[%s:%d]:%d: %pV", dev_name(&qedi->pdev->dev),
+			nfunc, line, qedi->host_no, &vaf);
+	else
+		pr_info("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+	va_end(va);
+}
+
+int
+qedi_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
+qedi_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/qedi/qedi_dbg.h

+/*
+ * QLogic iSCSI 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 _QEDI_DBG_H_
+#define _QEDI_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 <scsi/scsi_transport_iscsi.h>
+#include <linux/fs.h>
+
+#define __PREVENT_QED_HSI__
+#include <linux/qed/common_hsi.h>
+#include <linux/qed/qed_if.h>
+
+extern uint qedi_dbg_log;
+
+/* Debug print level definitions */
+#define QEDI_LOG_DEFAULT	0x1		/* Set default logging mask */
+#define QEDI_LOG_INFO		0x2		/* Informational logs,
+						 * MAC address, WWPN, WWNN
+						 */
+#define QEDI_LOG_DISC		0x4		/* Init, discovery, rport */
+#define QEDI_LOG_LL2		0x8		/* LL2, VLAN logs */
+#define QEDI_LOG_CONN		0x10		/* Connection setup, cleanup */
+#define QEDI_LOG_EVT		0x20		/* Events, link, mtu */
+#define QEDI_LOG_TIMER		0x40		/* Timer events */
+#define QEDI_LOG_MP_REQ		0x80		/* Middle Path (MP) logs */
+#define QEDI_LOG_SCSI_TM	0x100		/* SCSI Aborts, Task Mgmt */
+#define QEDI_LOG_UNSOL		0x200		/* unsolicited event logs */
+#define QEDI_LOG_IO		0x400		/* scsi cmd, completion */
+#define QEDI_LOG_MQ		0x800		/* Multi Queue logs */
+#define QEDI_LOG_BSG		0x1000		/* BSG logs */
+#define QEDI_LOG_DEBUGFS	0x2000		/* debugFS logs */
+#define QEDI_LOG_LPORT		0x4000		/* lport logs */
+#define QEDI_LOG_ELS		0x8000		/* ELS logs */
+#define QEDI_LOG_NPIV		0x10000		/* NPIV logs */
+#define QEDI_LOG_SESS		0x20000		/* Conection setup, cleanup */
+#define QEDI_LOG_UIO		0x40000		/* iSCSI UIO logs */
+#define QEDI_LOG_TID		0x80000         /* FW TID context acquire,
+						 * free
+						 */
+#define QEDI_TRACK_TID		0x100000        /* Track TID state. To be
+						 * enabled only at module load
+						 * and not run-time.
+						 */
+#define QEDI_TRACK_CMD_LIST    0x300000        /* Track active cmd list nodes,
+						* done with reference to TID,
+						* hence TRACK_TID also enabled.
+						*/
+#define QEDI_LOG_NOTICE		0x40000000	/* Notice logs */
+#define QEDI_LOG_WARN		0x80000000	/* Warning logs */
+
+/* Debug context structure */
+struct qedi_dbg_ctx {
+	unsigned int host_no;
+	struct pci_dev *pdev;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *bdf_dentry;
+#endif
+};
+
+#define QEDI_ERR(pdev, fmt, ...)	\
+		qedi_dbg_err(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
+#define QEDI_WARN(pdev, fmt, ...)	\
+		qedi_dbg_warn(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
+#define QEDI_NOTICE(pdev, fmt, ...)	\
+		qedi_dbg_notice(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
+#define QEDI_INFO(pdev, level, fmt, ...)	\
+		qedi_dbg_info(pdev, __func__, __LINE__, level, fmt,	\
+			      ## __VA_ARGS__)
+
+void qedi_dbg_err(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+		  const char *fmt, ...);
+void qedi_dbg_warn(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+		   const char *fmt, ...);
+void qedi_dbg_notice(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+		     const char *fmt, ...);
+void qedi_dbg_info(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+		   u32 info, const char *fmt, ...);
+
+struct Scsi_Host;
+
+struct sysfs_bin_attrs {
+	char *name;
+	struct bin_attribute *attr;
+};
+
+int qedi_create_sysfs_attr(struct Scsi_Host *shost,
+			   struct sysfs_bin_attrs *iter);
+void qedi_remove_sysfs_attr(struct Scsi_Host *shost,
+			    struct sysfs_bin_attrs *iter);
+
+#ifdef CONFIG_DEBUG_FS
+/* DebugFS related code */
+struct qedi_list_of_funcs {
+	char *oper_str;
+	ssize_t (*oper_func)(struct qedi_dbg_ctx *qedi);
+};
+
+struct qedi_debugfs_ops {
+	char *name;
+	struct qedi_list_of_funcs *qedi_funcs;
+};
+
+#define qedi_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 qedi_dbg_fileops_seq(drv, ops) \
+{ \
+	.owner = THIS_MODULE, \
+	.open = drv##_dbg_##ops##_open, \
+	.read = seq_read, \
+	.llseek = seq_lseek, \
+	.release = single_release, \
+}
+
+void qedi_dbg_host_init(struct qedi_dbg_ctx *qedi,
+			struct qedi_debugfs_ops *dops,
+			const struct file_operations *fops);
+void qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi);
+void qedi_dbg_init(char *drv_name);
+void qedi_dbg_exit(void);
+#endif /* CONFIG_DEBUG_FS */
+
+#endif /* _QEDI_DBG_H_ */

drivers/scsi/qedi/qedi_debugfs.c

+/*
+ * QLogic iSCSI 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 "qedi.h"
+#include "qedi_dbg.h"
+
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+#include <linux/module.h>
+
+int do_not_recover;
+static struct dentry *qedi_dbg_root;
+
+void
+qedi_dbg_host_init(struct qedi_dbg_ctx *qedi,
+		   struct qedi_debugfs_ops *dops,
+		   const struct file_operations *fops)
+{
+	char host_dirname[32];
+	struct dentry *file_dentry = NULL;
+
+	sprintf(host_dirname, "host%u", qedi->host_no);
+	qedi->bdf_dentry = debugfs_create_dir(host_dirname, qedi_dbg_root);
+	if (!qedi->bdf_dentry)
+		return;
+
+	while (dops) {
+		if (!(dops->name))
+			break;
+
+		file_dentry = debugfs_create_file(dops->name, 0600,
+						  qedi->bdf_dentry, qedi,
+						  fops);
+		if (!file_dentry) {
+			QEDI_INFO(qedi, QEDI_LOG_DEBUGFS,
+				  "Debugfs entry %s creation failed\n",
+				  dops->name);
+			debugfs_remove_recursive(qedi->bdf_dentry);
+			return;
+		}
+		dops++;
+		fops++;
+	}
+}
+
+void
+qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi)
+{
+	debugfs_remove_recursive(qedi->bdf_dentry);
+	qedi->bdf_dentry = NULL;
+}
+
+void
+qedi_dbg_init(char *drv_name)
+{
+	qedi_dbg_root = debugfs_create_dir(drv_name, NULL);
+	if (!qedi_dbg_root)
+		QEDI_INFO(NULL, QEDI_LOG_DEBUGFS, "Init of debugfs failed\n");
+}
+
+void
+qedi_dbg_exit(void)
+{
+	debugfs_remove_recursive(qedi_dbg_root);
+	qedi_dbg_root = NULL;
+}
+
+static ssize_t
+qedi_dbg_do_not_recover_enable(struct qedi_dbg_ctx *qedi_dbg)
+{
+	if (!do_not_recover)
+		do_not_recover = 1;
+
+	QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
+		  do_not_recover);
+	return 0;
+}
+
+static ssize_t
+qedi_dbg_do_not_recover_disable(struct qedi_dbg_ctx *qedi_dbg)
+{
+	if (do_not_recover)
+		do_not_recover = 0;
+
+	QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
+		  do_not_recover);
+	return 0;
+}
+
+static struct qedi_list_of_funcs qedi_dbg_do_not_recover_ops[] = {
+	{ "enable", qedi_dbg_do_not_recover_enable },
+	{ "disable", qedi_dbg_do_not_recover_disable },
+	{ NULL, NULL }
+};
+
+struct qedi_debugfs_ops qedi_debugfs_ops[] = {
+	{ "gbl_ctx", NULL },
+	{ "do_not_recover", qedi_dbg_do_not_recover_ops},
+	{ "io_trace", NULL },
+	{ NULL, NULL }
+};
+
+static ssize_t
+qedi_dbg_do_not_recover_cmd_write(struct file *filp, const char __user *buffer,
+				  size_t count, loff_t *ppos)
+{
+	size_t cnt = 0;
+	struct qedi_dbg_ctx *qedi_dbg =
+			(struct qedi_dbg_ctx *)filp->private_data;
+	struct qedi_list_of_funcs *lof = qedi_dbg_do_not_recover_ops;
+
+	if (*ppos)
+		return 0;
+
+	while (lof) {
+		if (!(lof->oper_str))
+			break;
+
+		if (!strncmp(lof->oper_str, buffer, strlen(lof->oper_str))) {
+			cnt = lof->oper_func(qedi_dbg);
+			break;
+		}
+
+		lof++;
+	}
+	return (count - cnt);
+}
+
+static ssize_t
+qedi_dbg_do_not_recover_cmd_read(struct file *filp, char __user *buffer,
+				 size_t count, loff_t *ppos)
+{
+	size_t cnt = 0;
+
+	if (*ppos)
+		return 0;
+
+	cnt = sprintf(buffer, "do_not_recover=%d\n", do_not_recover);
+	cnt = min_t(int, count, cnt - *ppos);
+	*ppos += cnt;
+	return cnt;
+}
+
+static int
+qedi_gbl_ctx_show(struct seq_file *s, void *unused)
+{
+	struct qedi_fastpath *fp = NULL;
+	struct qed_sb_info *sb_info = NULL;
+	struct status_block *sb = NULL;
+	struct global_queue *que = NULL;
+	int id;
+	u16 prod_idx;
+	struct qedi_ctx *qedi = s->private;
+	unsigned long flags;
+
+	seq_puts(s, " DUMP CQ CONTEXT:\n");
+
+	for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
+		spin_lock_irqsave(&qedi->hba_lock, flags);
+		seq_printf(s, "=========FAST CQ PATH [%d] ==========\n", id);
+		fp = &qedi->fp_array[id];
+		sb_info = fp->sb_info;
+		sb = sb_info->sb_virt;
+		prod_idx = (sb->pi_array[QEDI_PROTO_CQ_PROD_IDX] &
+			    STATUS_BLOCK_PROD_INDEX_MASK);
+		seq_printf(s, "SB PROD IDX: %d\n", prod_idx);
+		que = qedi->global_queues[fp->sb_id];
+		seq_printf(s, "DRV CONS IDX: %d\n", que->cq_cons_idx);
+		seq_printf(s, "CQ complete host memory: %d\n", fp->sb_id);
+		seq_puts(s, "=========== END ==================\n\n\n");
+		spin_unlock_irqrestore(&qedi->hba_lock, flags);
+	}
+	return 0;
+}
+
+static int
+qedi_dbg_gbl_ctx_open(struct inode *inode, struct file *file)
+{
+	struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
+	struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
+					     dbg_ctx);
+
+	return single_open(file, qedi_gbl_ctx_show, qedi);
+}
+
+static int
+qedi_io_trace_show(struct seq_file *s, void *unused)
+{
+	int id, idx = 0;
+	struct qedi_ctx *qedi = s->private;
+	struct qedi_io_log *io_log;
+	unsigned long flags;
+
+	seq_puts(s, " DUMP IO LOGS:\n");
+	spin_lock_irqsave(&qedi->io_trace_lock, flags);
+	idx = qedi->io_trace_idx;
+	for (id = 0; id < QEDI_IO_TRACE_SIZE; id++) {
+		io_log = &qedi->io_trace_buf[idx];
+		seq_printf(s, "iodir-%d:", io_log->direction);
+		seq_printf(s, "tid-0x%x:", io_log->task_id);
+		seq_printf(s, "cid-0x%x:", io_log->cid);
+		seq_printf(s, "lun-%d:", io_log->lun);
+		seq_printf(s, "op-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, "buflen-%d:", io_log->bufflen);
+		seq_printf(s, "sgcnt-%d:", io_log->sg_count);
+		seq_printf(s, "res-0x%08x:", io_log->result);
+		seq_printf(s, "jif-%lu:", io_log->jiffies);
+		seq_printf(s, "blk_req_cpu-%d:", io_log->blk_req_cpu);
+		seq_printf(s, "req_cpu-%d:", io_log->req_cpu);
+		seq_printf(s, "intr_cpu-%d:", io_log->intr_cpu);
+		seq_printf(s, "blk_rsp_cpu-%d\n", io_log->blk_rsp_cpu);
+
+		idx++;
+		if (idx == QEDI_IO_TRACE_SIZE)
+			idx = 0;
+	}
+	spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
+	return 0;
+}
+
+static int
+qedi_dbg_io_trace_open(struct inode *inode, struct file *file)
+{
+	struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
+	struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
+					     dbg_ctx);
+
+	return single_open(file, qedi_io_trace_show, qedi);
+}
+
+const struct file_operations qedi_dbg_fops[] = {
+	qedi_dbg_fileops_seq(qedi, gbl_ctx),
+	qedi_dbg_fileops(qedi, do_not_recover),
+	qedi_dbg_fileops_seq(qedi, io_trace),
+	{ NULL, NULL },
+};

drivers/scsi/qedi/qedi_fw.c

+/*
+ * QLogic iSCSI 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/blkdev.h>
+#include <scsi/scsi_tcq.h>
+#include <linux/delay.h>
+
+#include "qedi.h"
+#include "qedi_iscsi.h"
+#include "qedi_gbl.h"
+
+static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
+			       struct iscsi_task *mtask);
+
+void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
+{
+	struct scsi_cmnd *sc = cmd->scsi_cmd;
+
+	if (cmd->io_tbl.sge_valid && sc) {
+		cmd->io_tbl.sge_valid = 0;
+		scsi_dma_unmap(sc);
+	}
+}
+
+static void qedi_process_logout_resp(struct qedi_ctx *qedi,
+				     union iscsi_cqe *cqe,
+				     struct iscsi_task *task,
+				     struct qedi_conn *qedi_conn)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_logout_rsp *resp_hdr;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_logout_response_hdr *cqe_logout_response;
+	struct qedi_cmd *cmd;
+
+	cmd = (struct qedi_cmd *)task->dd_data;
+	cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
+	spin_lock(&session->back_lock);
+	resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
+	resp_hdr->opcode = cqe_logout_response->opcode;
+	resp_hdr->flags = cqe_logout_response->flags;
+	resp_hdr->hlength = 0;
+
+	resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
+	resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
+	resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
+	resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
+
+	resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time2wait);
+	resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time2retain);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+		  "Freeing tid=0x%x for cid=0x%x\n",
+		  cmd->task_id, qedi_conn->iscsi_conn_id);
+
+	if (likely(cmd->io_cmd_in_list)) {
+		cmd->io_cmd_in_list = false;
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	} else {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
+			  cmd->task_id, qedi_conn->iscsi_conn_id,
+			  &cmd->io_cmd);
+	}
+
+	cmd->state = RESPONSE_RECEIVED;
+	qedi_clear_task_idx(qedi, cmd->task_id);
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
+
+	spin_unlock(&session->back_lock);
+}
+
+static void qedi_process_text_resp(struct qedi_ctx *qedi,
+				   union iscsi_cqe *cqe,
+				   struct iscsi_task *task,
+				   struct qedi_conn *qedi_conn)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_task_context *task_ctx;
+	struct iscsi_text_rsp *resp_hdr_ptr;
+	struct iscsi_text_response_hdr *cqe_text_response;
+	struct qedi_cmd *cmd;
+	int pld_len;
+	u32 *tmp;
+
+	cmd = (struct qedi_cmd *)task->dd_data;
+	task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
+
+	cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
+	spin_lock(&session->back_lock);
+	resp_hdr_ptr =  (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
+	resp_hdr_ptr->opcode = cqe_text_response->opcode;
+	resp_hdr_ptr->flags = cqe_text_response->flags;
+	resp_hdr_ptr->hlength = 0;
+
+	hton24(resp_hdr_ptr->dlength,
+	       (cqe_text_response->hdr_second_dword &
+		ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
+	tmp = (u32 *)resp_hdr_ptr->dlength;
+
+	resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
+				      conn->session->age);
+	resp_hdr_ptr->ttt = cqe_text_response->ttt;
+	resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
+	resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
+	resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
+
+	pld_len = cqe_text_response->hdr_second_dword &
+		  ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
+	qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
+
+	memset(task_ctx, '\0', sizeof(*task_ctx));
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+		  "Freeing tid=0x%x for cid=0x%x\n",
+		  cmd->task_id, qedi_conn->iscsi_conn_id);
+
+	if (likely(cmd->io_cmd_in_list)) {
+		cmd->io_cmd_in_list = false;
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	} else {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
+			  cmd->task_id, qedi_conn->iscsi_conn_id,
+			  &cmd->io_cmd);
+	}
+
+	cmd->state = RESPONSE_RECEIVED;
+	qedi_clear_task_idx(qedi, cmd->task_id);
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
+			     qedi_conn->gen_pdu.resp_buf,
+			     (qedi_conn->gen_pdu.resp_wr_ptr -
+			      qedi_conn->gen_pdu.resp_buf));
+	spin_unlock(&session->back_lock);
+}
+
+static void qedi_tmf_resp_work(struct work_struct *work)
+{
+	struct qedi_cmd *qedi_cmd =
+				container_of(work, struct qedi_cmd, tmf_work);
+	struct qedi_conn *qedi_conn = qedi_cmd->conn;
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_tm_rsp *resp_hdr_ptr;
+	struct iscsi_cls_session *cls_sess;
+	int rval = 0;
+
+	set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+	resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
+	cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
+
+	iscsi_block_session(session->cls_session);
+	rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
+	if (rval) {
+		clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+		qedi_clear_task_idx(qedi, qedi_cmd->task_id);
+		iscsi_unblock_session(session->cls_session);
+		return;
+	}
+
+	iscsi_unblock_session(session->cls_session);
+	qedi_clear_task_idx(qedi, qedi_cmd->task_id);
+
+	spin_lock(&session->back_lock);
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
+	spin_unlock(&session->back_lock);
+	kfree(resp_hdr_ptr);
+	clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+}
+
+static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
+				  union iscsi_cqe *cqe,
+				  struct iscsi_task *task,
+				  struct qedi_conn *qedi_conn)
+
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_tmf_response_hdr *cqe_tmp_response;
+	struct iscsi_tm_rsp *resp_hdr_ptr;
+	struct iscsi_tm *tmf_hdr;
+	struct qedi_cmd *qedi_cmd = NULL;
+	u32 *tmp;
+
+	cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
+
+	qedi_cmd = task->dd_data;
+	qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_KERNEL);
+	if (!qedi_cmd->tmf_resp_buf) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failed to allocate resp buf, cid=0x%x\n",
+			  qedi_conn->iscsi_conn_id);
+		return;
+	}
+
+	spin_lock(&session->back_lock);
+	resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
+	memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
+
+	/* Fill up the header */
+	resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
+	resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
+	resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
+	resp_hdr_ptr->hlength = 0;
+
+	hton24(resp_hdr_ptr->dlength,
+	       (cqe_tmp_response->hdr_second_dword &
+		ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
+	tmp = (u32 *)resp_hdr_ptr->dlength;
+	resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
+				      conn->session->age);
+	resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
+	resp_hdr_ptr->exp_cmdsn  = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
+	resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
+
+	tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
+
+	if (likely(qedi_cmd->io_cmd_in_list)) {
+		qedi_cmd->io_cmd_in_list = false;
+		list_del_init(&qedi_cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	}
+
+	if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	      ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
+	    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	      ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
+	    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	      ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
+		INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
+		queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
+		goto unblock_sess;
+	}
+
+	qedi_clear_task_idx(qedi, qedi_cmd->task_id);
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
+	kfree(resp_hdr_ptr);
+
+unblock_sess:
+	spin_unlock(&session->back_lock);
+}
+
+static void qedi_process_login_resp(struct qedi_ctx *qedi,
+				    union iscsi_cqe *cqe,
+				    struct iscsi_task *task,
+				    struct qedi_conn *qedi_conn)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_task_context *task_ctx;
+	struct iscsi_login_rsp *resp_hdr_ptr;
+	struct iscsi_login_response_hdr *cqe_login_response;
+	struct qedi_cmd *cmd;
+	int pld_len;
+	u32 *tmp;
+
+	cmd = (struct qedi_cmd *)task->dd_data;
+
+	cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
+	task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
+
+	spin_lock(&session->back_lock);
+	resp_hdr_ptr =  (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
+	resp_hdr_ptr->opcode = cqe_login_response->opcode;
+	resp_hdr_ptr->flags = cqe_login_response->flags_attr;
+	resp_hdr_ptr->hlength = 0;
+
+	hton24(resp_hdr_ptr->dlength,
+	       (cqe_login_response->hdr_second_dword &
+		ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
+	tmp = (u32 *)resp_hdr_ptr->dlength;
+	resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
+				      conn->session->age);
+	resp_hdr_ptr->tsih = cqe_login_response->tsih;
+	resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
+	resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
+	resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
+	resp_hdr_ptr->status_class = cqe_login_response->status_class;
+	resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
+	pld_len = cqe_login_response->hdr_second_dword &
+		  ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
+	qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
+
+	if (likely(cmd->io_cmd_in_list)) {
+		cmd->io_cmd_in_list = false;
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	}
+
+	memset(task_ctx, '\0', sizeof(*task_ctx));
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
+			     qedi_conn->gen_pdu.resp_buf,
+			     (qedi_conn->gen_pdu.resp_wr_ptr -
+			     qedi_conn->gen_pdu.resp_buf));
+
+	spin_unlock(&session->back_lock);
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+		  "Freeing tid=0x%x for cid=0x%x\n",
+		  cmd->task_id, qedi_conn->iscsi_conn_id);
+	cmd->state = RESPONSE_RECEIVED;
+	qedi_clear_task_idx(qedi, cmd->task_id);
+}
+
+static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
+				struct iscsi_cqe_unsolicited *cqe,
+				char *ptr, int len)
+{
+	u16 idx = 0;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
+		  len, qedi->bdq_prod_idx,
+		  (qedi->bdq_prod_idx % qedi->rq_num_entries));
+
+	/* Obtain buffer address from rqe_opaque */
+	idx = cqe->rqe_opaque.lo;
+	if ((idx < 0) || (idx > (QEDI_BDQ_NUM - 1))) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
+			  idx);
+		return;
+	}
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "rqe_opaque.lo [0x%p], rqe_opaque.hi [0x%p], idx [%d]\n",
+		  cqe->rqe_opaque.lo, cqe->rqe_opaque.hi, idx);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
+	switch (cqe->unsol_cqe_type) {
+	case ISCSI_CQE_UNSOLICITED_SINGLE:
+	case ISCSI_CQE_UNSOLICITED_FIRST:
+		if (len)
+			memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
+		break;
+	case ISCSI_CQE_UNSOLICITED_MIDDLE:
+	case ISCSI_CQE_UNSOLICITED_LAST:
+		break;
+	default:
+		break;
+	}
+}
+
+static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
+				struct iscsi_cqe_unsolicited *cqe,
+				int count)
+{
+	u16 tmp;
+	u16 idx = 0;
+	struct scsi_bd *pbl;
+
+	/* Obtain buffer address from rqe_opaque */
+	idx = cqe->rqe_opaque.lo;
+	if ((idx < 0) || (idx > (QEDI_BDQ_NUM - 1))) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
+			  idx);
+		return;
+	}
+
+	pbl = (struct scsi_bd *)qedi->bdq_pbl;
+	pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
+	pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
+	pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
+		  pbl, pbl->address.hi, pbl->address.lo, idx);
+	pbl->opaque.hi = 0;
+	pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(idx));
+
+	/* Increment producer to let f/w know we've handled the frame */
+	qedi->bdq_prod_idx += count;
+
+	writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
+	tmp = readw(qedi->bdq_primary_prod);
+
+	writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
+	tmp = readw(qedi->bdq_secondary_prod);
+}
+
+static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
+				      struct iscsi_cqe_unsolicited *cqe,
+				      u32 pdu_len, u32 num_bdqs,
+				      char *bdq_data)
+{
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "num_bdqs [%d]\n", num_bdqs);
+
+	qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
+	qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
+}
+
+static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
+				   union iscsi_cqe *cqe,
+				   struct iscsi_task *task,
+				   struct qedi_conn *qedi_conn, u16 que_idx)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_nop_in_hdr *cqe_nop_in;
+	struct iscsi_nopin *hdr;
+	struct qedi_cmd *cmd;
+	int tgt_async_nop = 0;
+	u32 lun[2];
+	u32 pdu_len, num_bdqs;
+	char bdq_data[QEDI_BDQ_BUF_SIZE];
+	unsigned long flags;
+
+	spin_lock_bh(&session->back_lock);
+	cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
+
+	pdu_len = cqe_nop_in->hdr_second_dword &
+		  ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
+	num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
+
+	hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(hdr, 0, sizeof(struct iscsi_hdr));
+	hdr->opcode = cqe_nop_in->opcode;
+	hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
+	hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
+	hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
+	hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
+
+	if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
+		spin_lock_irqsave(&qedi->hba_lock, flags);
+		qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
+					  pdu_len, num_bdqs, bdq_data);
+		hdr->itt = RESERVED_ITT;
+		tgt_async_nop = 1;
+		spin_unlock_irqrestore(&qedi->hba_lock, flags);
+		goto done;
+	}
+
+	/* Response to one of our nop-outs */
+	if (task) {
+		cmd = task->dd_data;
+		hdr->flags = ISCSI_FLAG_CMD_FINAL;
+		hdr->itt = build_itt(cqe->cqe_solicited.itid,
+				     conn->session->age);
+		lun[0] = 0xffffffff;
+		lun[1] = 0xffffffff;
+		memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+			  "Freeing tid=0x%x for cid=0x%x\n",
+			  cmd->task_id, qedi_conn->iscsi_conn_id);
+		cmd->state = RESPONSE_RECEIVED;
+		spin_lock(&qedi_conn->list_lock);
+		if (likely(cmd->io_cmd_in_list)) {
+			cmd->io_cmd_in_list = false;
+			list_del_init(&cmd->io_cmd);
+			qedi_conn->active_cmd_count--;
+		}
+
+		spin_unlock(&qedi_conn->list_lock);
+		qedi_clear_task_idx(qedi, cmd->task_id);
+	}
+
+done:
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
+
+	spin_unlock_bh(&session->back_lock);
+	return tgt_async_nop;
+}
+
+static void qedi_process_async_mesg(struct qedi_ctx *qedi,
+				    union iscsi_cqe *cqe,
+				    struct iscsi_task *task,
+				    struct qedi_conn *qedi_conn,
+				    u16 que_idx)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_async_msg_hdr *cqe_async_msg;
+	struct iscsi_async *resp_hdr;
+	u32 lun[2];
+	u32 pdu_len, num_bdqs;
+	char bdq_data[QEDI_BDQ_BUF_SIZE];
+	unsigned long flags;
+
+	spin_lock_bh(&session->back_lock);
+
+	cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
+	pdu_len = cqe_async_msg->hdr_second_dword &
+		ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
+	num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
+
+	if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
+		spin_lock_irqsave(&qedi->hba_lock, flags);
+		qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
+					  pdu_len, num_bdqs, bdq_data);
+		spin_unlock_irqrestore(&qedi->hba_lock, flags);
+	}
+
+	resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
+	resp_hdr->opcode = cqe_async_msg->opcode;
+	resp_hdr->flags = 0x80;
+
+	lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
+	lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
+	memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
+	resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
+	resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
+	resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
+
+	resp_hdr->async_event = cqe_async_msg->async_event;
+	resp_hdr->async_vcode = cqe_async_msg->async_vcode;
+
+	resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
+	resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
+	resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
+			     pdu_len);
+
+	spin_unlock_bh(&session->back_lock);
+}
+
+static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
+				     union iscsi_cqe *cqe,
+				     struct iscsi_task *task,
+				     struct qedi_conn *qedi_conn,
+				     uint16_t que_idx)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_reject_hdr *cqe_reject;
+	struct iscsi_reject *hdr;
+	u32 pld_len, num_bdqs;
+	unsigned long flags;
+
+	spin_lock_bh(&session->back_lock);
+	cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
+	pld_len = cqe_reject->hdr_second_dword &
+		  ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
+	num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
+
+	if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
+		spin_lock_irqsave(&qedi->hba_lock, flags);
+		qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
+					  pld_len, num_bdqs, conn->data);
+		spin_unlock_irqrestore(&qedi->hba_lock, flags);
+	}
+	hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(hdr, 0, sizeof(struct iscsi_hdr));
+	hdr->opcode = cqe_reject->opcode;
+	hdr->reason = cqe_reject->hdr_reason;
+	hdr->flags = cqe_reject->hdr_flags;
+	hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
+			      ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
+	hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
+	hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
+	hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
+	hdr->ffffffff = cpu_to_be32(0xffffffff);
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
+			     conn->data, pld_len);
+	spin_unlock_bh(&session->back_lock);
+}
+
+static void qedi_scsi_completion(struct qedi_ctx *qedi,
+				 union iscsi_cqe *cqe,
+				 struct iscsi_task *task,
+				 struct iscsi_conn *conn)
+{
+	struct scsi_cmnd *sc_cmd;
+	struct qedi_cmd *cmd = task->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_scsi_rsp *hdr;
+	struct iscsi_data_in_hdr *cqe_data_in;
+	int datalen = 0;
+	struct qedi_conn *qedi_conn;
+	u32 iscsi_cid;
+	bool mark_cmd_node_deleted = false;
+	u8 cqe_err_bits = 0;
+
+	iscsi_cid  = cqe->cqe_common.conn_id;
+	qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
+
+	cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
+	cqe_err_bits =
+		cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
+
+	spin_lock_bh(&session->back_lock);
+	/* get the scsi command */
+	sc_cmd = cmd->scsi_cmd;
+
+	if (!sc_cmd) {
+		QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
+		goto error;
+	}
+
+	if (!sc_cmd->SCp.ptr) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "SCp.ptr is NULL, returned in another context.\n");
+		goto error;
+	}
+
+	if (!sc_cmd->request) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "sc_cmd->request is NULL, sc_cmd=%p.\n",
+			  sc_cmd);
+		goto error;
+	}
+
+	if (!sc_cmd->request->special) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "request->special is NULL so request not valid, sc_cmd=%p.\n",
+			  sc_cmd);
+		goto error;
+	}
+
+	if (!sc_cmd->request->q) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "request->q is NULL so request is not valid, sc_cmd=%p.\n",
+			  sc_cmd);
+		goto error;
+	}
+
+	qedi_iscsi_unmap_sg_list(cmd);
+
+	hdr = (struct iscsi_scsi_rsp *)task->hdr;
+	hdr->opcode = cqe_data_in->opcode;
+	hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
+	hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
+	hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
+	hdr->response = cqe_data_in->reserved1;
+	hdr->cmd_status = cqe_data_in->status_rsvd;
+	hdr->flags = cqe_data_in->flags;
+	hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
+
+	if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
+		datalen = cqe_data_in->reserved2 &
+			  ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
+		memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
+	}
+
+	/* If f/w reports data underrun err then set residual to IO transfer
+	 * length, set Underrun flag and clear Overrun flag explicitly
+	 */
+	if (unlikely(cqe_err_bits &&
+		     GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
+			  hdr->itt, cqe_data_in->flags, cmd->task_id,
+			  qedi_conn->iscsi_conn_id, hdr->residual_count,
+			  scsi_bufflen(sc_cmd));
+		hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
+		hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
+		hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
+	}
+
+	spin_lock(&qedi_conn->list_lock);
+	if (likely(cmd->io_cmd_in_list)) {
+		cmd->io_cmd_in_list = false;
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+		mark_cmd_node_deleted = true;
+	}
+	spin_unlock(&qedi_conn->list_lock);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+		  "Freeing tid=0x%x for cid=0x%x\n",
+		  cmd->task_id, qedi_conn->iscsi_conn_id);
+	cmd->state = RESPONSE_RECEIVED;
+	if (qedi_io_tracing)
+		qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
+
+	qedi_clear_task_idx(qedi, cmd->task_id);
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
+			     conn->data, datalen);
+error:
+	spin_unlock_bh(&session->back_lock);
+}
+
+static void qedi_mtask_completion(struct qedi_ctx *qedi,
+				  union iscsi_cqe *cqe,
+				  struct iscsi_task *task,
+				  struct qedi_conn *conn, uint16_t que_idx)
+{
+	struct iscsi_conn *iscsi_conn;
+	u32 hdr_opcode;
+
+	hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
+	iscsi_conn = conn->cls_conn->dd_data;
+
+	switch (hdr_opcode) {
+	case ISCSI_OPCODE_SCSI_RESPONSE:
+	case ISCSI_OPCODE_DATA_IN:
+		qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
+		break;
+	case ISCSI_OPCODE_LOGIN_RESPONSE:
+		qedi_process_login_resp(qedi, cqe, task, conn);
+		break;
+	case ISCSI_OPCODE_TMF_RESPONSE:
+		qedi_process_tmf_resp(qedi, cqe, task, conn);
+		break;
+	case ISCSI_OPCODE_TEXT_RESPONSE:
+		qedi_process_text_resp(qedi, cqe, task, conn);
+		break;
+	case ISCSI_OPCODE_LOGOUT_RESPONSE:
+		qedi_process_logout_resp(qedi, cqe, task, conn);
+		break;
+	case ISCSI_OPCODE_NOP_IN:
+		qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
+		break;
+	default:
+		QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
+	}
+}
+
+static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
+					  struct iscsi_cqe_solicited *cqe,
+					  struct iscsi_task *task,
+					  struct qedi_conn *qedi_conn)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct qedi_cmd *cmd = task->dd_data;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
+		  "itid=0x%x, cmd task id=0x%x\n",
+		  cqe->itid, cmd->task_id);
+
+	cmd->state = RESPONSE_RECEIVED;
+	qedi_clear_task_idx(qedi, cmd->task_id);
+
+	spin_lock_bh(&session->back_lock);
+	__iscsi_put_task(task);
+	spin_unlock_bh(&session->back_lock);
+}
+
+static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
+					  struct iscsi_cqe_solicited *cqe,
+					  struct iscsi_task *task,
+					  struct iscsi_conn *conn)
+{
+	struct qedi_work_map *work, *work_tmp;
+	u32 proto_itt = cqe->itid;
+	u32 ptmp_itt = 0;
+	itt_t protoitt = 0;
+	int found = 0;
+	struct qedi_cmd *qedi_cmd = NULL;
+	u32 rtid = 0;
+	u32 iscsi_cid;
+	struct qedi_conn *qedi_conn;
+	struct qedi_cmd *cmd_new, *dbg_cmd;
+	struct iscsi_task *mtask;
+	struct iscsi_tm *tmf_hdr = NULL;
+
+	iscsi_cid = cqe->conn_id;
+	qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
+
+	/* Based on this itt get the corresponding qedi_cmd */
+	spin_lock_bh(&qedi_conn->tmf_work_lock);
+	list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
+				 list) {
+		if (work->rtid == proto_itt) {
+			/* We found the command */
+			qedi_cmd = work->qedi_cmd;
+			if (!qedi_cmd->list_tmf_work) {
+				QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+					  "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
+					  proto_itt, qedi_conn->iscsi_conn_id);
+				WARN_ON(1);
+			}
+			found = 1;
+			mtask = qedi_cmd->task;
+			tmf_hdr = (struct iscsi_tm *)mtask->hdr;
+			rtid = work->rtid;
+
+			list_del_init(&work->list);
+			kfree(work);
+			qedi_cmd->list_tmf_work = NULL;
+		}
+	}
+	spin_unlock_bh(&qedi_conn->tmf_work_lock);
+
+	if (found) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+			  "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
+			  proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
+
+		if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+		    ISCSI_TM_FUNC_ABORT_TASK) {
+			spin_lock_bh(&conn->session->back_lock);
+
+			protoitt = build_itt(get_itt(tmf_hdr->rtt),
+					     conn->session->age);
+			task = iscsi_itt_to_task(conn, protoitt);
+
+			spin_unlock_bh(&conn->session->back_lock);
+
+			if (!task) {
+				QEDI_NOTICE(&qedi->dbg_ctx,
+					    "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
+					    get_itt(tmf_hdr->rtt),
+					    qedi_conn->iscsi_conn_id);
+				return;
+			}
+
+			dbg_cmd = task->dd_data;
+
+			QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+				  "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
+				  get_itt(tmf_hdr->rtt), get_itt(task->itt),
+				  dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
+
+			if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
+				qedi_cmd->state = CLEANUP_RECV;
+
+			qedi_clear_task_idx(qedi_conn->qedi, rtid);
+
+			spin_lock(&qedi_conn->list_lock);
+			list_del_init(&dbg_cmd->io_cmd);
+			qedi_conn->active_cmd_count--;
+			spin_unlock(&qedi_conn->list_lock);
+			qedi_cmd->state = CLEANUP_RECV;
+			wake_up_interruptible(&qedi_conn->wait_queue);
+		}
+	} else if (qedi_conn->cmd_cleanup_req > 0) {
+		spin_lock_bh(&conn->session->back_lock);
+		qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
+		protoitt = build_itt(ptmp_itt, conn->session->age);
+		task = iscsi_itt_to_task(conn, protoitt);
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+			  "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
+			  cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
+			  qedi_conn->iscsi_conn_id);
+
+		spin_unlock_bh(&conn->session->back_lock);
+		if (!task) {
+			QEDI_NOTICE(&qedi->dbg_ctx,
+				    "task is null, itid=0x%x, cid=0x%x\n",
+				    cqe->itid, qedi_conn->iscsi_conn_id);
+			return;
+		}
+		qedi_conn->cmd_cleanup_cmpl++;
+		wake_up(&qedi_conn->wait_queue);
+		cmd_new = task->dd_data;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+			  "Freeing tid=0x%x for cid=0x%x\n",
+			  cqe->itid, qedi_conn->iscsi_conn_id);
+		qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
+
+	} else {
+		qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
+		protoitt = build_itt(ptmp_itt, conn->session->age);
+		task = iscsi_itt_to_task(conn, protoitt);
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
+			 protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
+		WARN_ON(1);
+	}
+}
+
+void qedi_fp_process_cqes(struct qedi_work *work)
+{
+	struct qedi_ctx *qedi = work->qedi;
+	union iscsi_cqe *cqe = &work->cqe;
+	struct iscsi_task *task = NULL;
+	struct iscsi_nopout *nopout_hdr;
+	struct qedi_conn *q_conn;
+	struct iscsi_conn *conn;
+	struct qedi_cmd *qedi_cmd;
+	u32 comp_type;
+	u32 iscsi_cid;
+	u32 hdr_opcode;
+	u16 que_idx = work->que_idx;
+	u8 cqe_err_bits = 0;
+
+	comp_type = cqe->cqe_common.cqe_type;
+	hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
+	cqe_err_bits =
+		cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
+		  cqe->cqe_common.conn_id, comp_type, hdr_opcode);
+
+	if (comp_type >= MAX_ISCSI_CQES_TYPE) {
+		QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
+		return;
+	}
+
+	iscsi_cid  = cqe->cqe_common.conn_id;
+	q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
+	if (!q_conn) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Session no longer exists for cid=0x%x!!\n",
+			  iscsi_cid);
+		return;
+	}
+
+	conn = q_conn->cls_conn->dd_data;
+
+	if (unlikely(cqe_err_bits &&
+		     GET_FIELD(cqe_err_bits,
+			       CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
+		iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
+		return;
+	}
+
+	switch (comp_type) {
+	case ISCSI_CQE_TYPE_SOLICITED:
+	case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
+		qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
+		task = qedi_cmd->task;
+		if (!task) {
+			QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
+			return;
+		}
+
+		/* Process NOPIN local completion */
+		nopout_hdr = (struct iscsi_nopout *)task->hdr;
+		if ((nopout_hdr->itt == RESERVED_ITT) &&
+		    (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
+			qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
+						      task, q_conn);
+		} else {
+			cqe->cqe_solicited.itid =
+					       qedi_get_itt(cqe->cqe_solicited);
+			/* Process other solicited responses */
+			qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
+		}
+		break;
+	case ISCSI_CQE_TYPE_UNSOLICITED:
+		switch (hdr_opcode) {
+		case ISCSI_OPCODE_NOP_IN:
+			qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
+						que_idx);
+			break;
+		case ISCSI_OPCODE_ASYNC_MSG:
+			qedi_process_async_mesg(qedi, cqe, task, q_conn,
+						que_idx);
+			break;
+		case ISCSI_OPCODE_REJECT:
+			qedi_process_reject_mesg(qedi, cqe, task, q_conn,
+						 que_idx);
+			break;
+		}
+		goto exit_fp_process;
+	case ISCSI_CQE_TYPE_DUMMY:
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
+		goto exit_fp_process;
+	case ISCSI_CQE_TYPE_TASK_CLEANUP:
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
+		qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
+					      conn);
+		goto exit_fp_process;
+	default:
+		QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
+		break;
+	}
+
+exit_fp_process:
+	return;
+}
+
+static void qedi_add_to_sq(struct qedi_conn *qedi_conn, struct iscsi_task *task,
+			   u16 tid, uint16_t ptu_invalidate, int is_cleanup)
+{
+	struct iscsi_wqe *wqe;
+	struct iscsi_wqe_field *cont_field;
+	struct qedi_endpoint *ep;
+	struct scsi_cmnd *sc = task->sc;
+	struct iscsi_login_req *login_hdr;
+	struct qedi_cmd *cmd = task->dd_data;
+
+	login_hdr = (struct iscsi_login_req *)task->hdr;
+	ep = qedi_conn->ep;
+	wqe = &ep->sq[ep->sq_prod_idx];
+
+	memset(wqe, 0, sizeof(*wqe));
+
+	ep->sq_prod_idx++;
+	ep->fw_sq_prod_idx++;
+	if (ep->sq_prod_idx == QEDI_SQ_SIZE)
+		ep->sq_prod_idx = 0;
+
+	if (is_cleanup) {
+		SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
+			  ISCSI_WQE_TYPE_TASK_CLEANUP);
+		wqe->task_id = tid;
+		return;
+	}
+
+	if (ptu_invalidate) {
+		SET_FIELD(wqe->flags, ISCSI_WQE_PTU_INVALIDATE,
+			  ISCSI_WQE_SET_PTU_INVALIDATE);
+	}
+
+	cont_field = &wqe->cont_prevtid_union.cont_field;
+
+	switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
+	case ISCSI_OP_LOGIN:
+	case ISCSI_OP_TEXT:
+		SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
+			  ISCSI_WQE_TYPE_MIDDLE_PATH);
+		SET_FIELD(wqe->flags, ISCSI_WQE_NUM_FAST_SGES,
+			  1);
+		cont_field->contlen_cdbsize_field = ntoh24(login_hdr->dlength);
+		break;
+	case ISCSI_OP_LOGOUT:
+	case ISCSI_OP_NOOP_OUT:
+	case ISCSI_OP_SCSI_TMFUNC:
+		 SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
+			   ISCSI_WQE_TYPE_NORMAL);
+		break;
+	default:
+		if (!sc)
+			break;
+
+		SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
+			  ISCSI_WQE_TYPE_NORMAL);
+		cont_field->contlen_cdbsize_field =
+				(sc->sc_data_direction == DMA_TO_DEVICE) ?
+				scsi_bufflen(sc) : 0;
+		if (cmd->use_slowpath)
+			SET_FIELD(wqe->flags, ISCSI_WQE_NUM_FAST_SGES, 0);
+		else
+			SET_FIELD(wqe->flags, ISCSI_WQE_NUM_FAST_SGES,
+				  (sc->sc_data_direction ==
+				   DMA_TO_DEVICE) ?
+				  min((u16)QEDI_FAST_SGE_COUNT,
+				      (u16)cmd->io_tbl.sge_valid) : 0);
+		break;
+	}
+
+	wqe->task_id = tid;
+	/* Make sure SQ data is coherent */
+	wmb();
+}
+
+static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
+{
+	struct iscsi_db_data dbell = { 0 };
+
+	dbell.agg_flags = 0;
+
+	dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
+	dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
+	dbell.params |=
+		   DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
+
+	dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
+	writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
+
+	/* Make sure fw write idx is coherent, and include both memory barriers
+	 * as a failsafe as for some architectures the call is the same but on
+	 * others they are two different assembly operations.
+	 */
+	wmb();
+	mmiowb();
+	QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
+		  "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
+		  qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
+		  qedi_conn->iscsi_conn_id);
+}
+
+int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *task)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_login_req *login_hdr;
+	struct iscsi_login_req_hdr *fw_login_req = NULL;
+	struct iscsi_cached_sge_ctx *cached_sge = NULL;
+	struct iscsi_sge *single_sge = NULL;
+	struct iscsi_sge *req_sge = NULL;
+	struct iscsi_sge *resp_sge = NULL;
+	struct qedi_cmd *qedi_cmd;
+	s16 ptu_invalidate = 0;
+	s16 tid = 0;
+
+	req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+	resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
+	qedi_cmd = (struct qedi_cmd *)task->dd_data;
+	login_hdr = (struct iscsi_login_req *)task->hdr;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1)
+		return -ENOMEM;
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+
+	qedi_cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_login_req = &fw_task_ctx->ystorm_st_context.pdu_hdr.login_req;
+	fw_login_req->opcode = login_hdr->opcode;
+	fw_login_req->version_min = login_hdr->min_version;
+	fw_login_req->version_max = login_hdr->max_version;
+	fw_login_req->flags_attr = login_hdr->flags;
+	fw_login_req->isid_tabc = *((u16 *)login_hdr->isid + 2);
+	fw_login_req->isid_d = *((u32 *)login_hdr->isid);
+	fw_login_req->tsih = login_hdr->tsih;
+	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
+	fw_login_req->itt = qedi_set_itt(tid, get_itt(task->itt));
+	fw_login_req->cid = qedi_conn->iscsi_conn_id;
+	fw_login_req->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
+	fw_login_req->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
+	fw_login_req->exp_stat_sn = 0;
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						qedi->tid_reuse_count[tid]++;
+	cached_sge =
+	       &fw_task_ctx->ystorm_st_context.state.sgl_ctx_union.cached_sge;
+	cached_sge->sge.sge_len = req_sge->sge_len;
+	cached_sge->sge.sge_addr.lo = (u32)(qedi_conn->gen_pdu.req_dma_addr);
+	cached_sge->sge.sge_addr.hi =
+			     (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
+
+	/* Mstorm context */
+	single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
+	fw_task_ctx->mstorm_st_context.task_type = 0x2;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+	single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
+	single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
+	single_sge->sge_len = resp_sge->sge_len;
+
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SINGLE_SGE, 1);
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SLOW_IO, 0);
+	fw_task_ctx->mstorm_st_context.sgl_size = 1;
+	fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = resp_sge->sge_len;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len =
+						ntoh24(login_hdr->dlength);
+	fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+	fw_task_ctx->ustorm_st_context.task_type = 0x2;
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	fw_task_ctx->ustorm_ag_context.exp_data_acked =
+						 ntoh24(login_hdr->dlength);
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+		  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
+
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+	qedi_cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+	return 0;
+}
+
+int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_logout_req_hdr *fw_logout_req = NULL;
+	struct iscsi_task_context *fw_task_ctx = NULL;
+	struct iscsi_logout *logout_hdr = NULL;
+	struct qedi_cmd *qedi_cmd = NULL;
+	s16  tid = 0;
+	s16 ptu_invalidate = 0;
+
+	qedi_cmd = (struct qedi_cmd *)task->dd_data;
+	logout_hdr = (struct iscsi_logout *)task->hdr;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1)
+		return -ENOMEM;
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+	qedi_cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_logout_req = &fw_task_ctx->ystorm_st_context.pdu_hdr.logout_req;
+	fw_logout_req->opcode = ISCSI_OPCODE_LOGOUT_REQUEST;
+	fw_logout_req->reason_code = 0x80 | logout_hdr->flags;
+	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
+	fw_logout_req->itt = qedi_set_itt(tid, get_itt(task->itt));
+	fw_logout_req->exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
+	fw_logout_req->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						  qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						qedi->tid_reuse_count[tid]++;
+	fw_logout_req->cid = qedi_conn->iscsi_conn_id;
+	fw_task_ctx->ystorm_st_context.state.buffer_offset[0] = 0;
+
+	/* Mstorm context */
+	fw_task_ctx->mstorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = 0;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len = 0;
+	fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
+	fw_task_ctx->ustorm_st_context.task_type =  ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+
+	SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+		  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+		  ISCSI_REG1_NUM_FAST_SGES, 0);
+
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+	qedi_cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+
+	return 0;
+}
+
+int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
+			struct iscsi_task *task, bool in_recovery)
+{
+	int rval;
+	struct iscsi_task *ctask;
+	struct qedi_cmd *cmd, *cmd_tmp;
+	struct iscsi_tm *tmf_hdr;
+	unsigned int lun = 0;
+	bool lun_reset = false;
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+
+	/* From recovery, task is NULL or from tmf resp valid task */
+	if (task) {
+		tmf_hdr = (struct iscsi_tm *)task->hdr;
+
+		if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+			ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
+			lun_reset = true;
+			lun = scsilun_to_int(&tmf_hdr->lun);
+		}
+	}
+
+	qedi_conn->cmd_cleanup_req = 0;
+	qedi_conn->cmd_cleanup_cmpl = 0;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
+		  qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
+		  in_recovery, lun_reset);
+
+	if (lun_reset)
+		spin_lock_bh(&session->back_lock);
+
+	spin_lock(&qedi_conn->list_lock);
+
+	list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
+				 io_cmd) {
+		ctask = cmd->task;
+		if (ctask == task)
+			continue;
+
+		if (lun_reset) {
+			if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
+				QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+					  "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
+					  cmd->task_id, get_itt(ctask->itt),
+					  cmd->scsi_cmd, cmd->scsi_cmd->device,
+					  ctask->state, cmd->state,
+					  qedi_conn->iscsi_conn_id);
+				if (cmd->scsi_cmd->device->lun != lun)
+					continue;
+			}
+		}
+		qedi_conn->cmd_cleanup_req++;
+		qedi_iscsi_cleanup_task(ctask, true);
+
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
+			  &cmd->io_cmd, qedi_conn->iscsi_conn_id);
+	}
+
+	spin_unlock(&qedi_conn->list_lock);
+
+	if (lun_reset)
+		spin_unlock_bh(&session->back_lock);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "cmd_cleanup_req=%d, cid=0x%x\n",
+		  qedi_conn->cmd_cleanup_req,
+		  qedi_conn->iscsi_conn_id);
+
+	rval  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
+						 ((qedi_conn->cmd_cleanup_req ==
+						 qedi_conn->cmd_cleanup_cmpl) ||
+						 qedi_conn->ep),
+						 5 * HZ);
+	if (rval) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+			  "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
+			  qedi_conn->cmd_cleanup_req,
+			  qedi_conn->cmd_cleanup_cmpl,
+			  qedi_conn->iscsi_conn_id);
+
+		return 0;
+	}
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
+		  qedi_conn->cmd_cleanup_req,
+		  qedi_conn->cmd_cleanup_cmpl,
+		  qedi_conn->iscsi_conn_id);
+
+	iscsi_host_for_each_session(qedi->shost,
+				    qedi_mark_device_missing);
+	qedi_ops->common->drain(qedi->cdev);
+
+	/* Enable IOs for all other sessions except current.*/
+	if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
+					      (qedi_conn->cmd_cleanup_req ==
+					       qedi_conn->cmd_cleanup_cmpl),
+					      5 * HZ)) {
+		iscsi_host_for_each_session(qedi->shost,
+					    qedi_mark_device_available);
+		return -1;
+	}
+
+	iscsi_host_for_each_session(qedi->shost,
+				    qedi_mark_device_available);
+
+	return 0;
+}
+
+void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
+		  struct iscsi_task *task)
+{
+	struct qedi_endpoint *qedi_ep;
+	int rval;
+
+	qedi_ep = qedi_conn->ep;
+	qedi_conn->cmd_cleanup_req = 0;
+	qedi_conn->cmd_cleanup_cmpl = 0;
+
+	if (!qedi_ep) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Cannot proceed, ep already disconnected, cid=0x%x\n",
+			  qedi_conn->iscsi_conn_id);
+		return;
+	}
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
+		  qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
+
+	qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
+
+	rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
+	if (rval) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "fatal error, need hard reset, cid=0x%x\n",
+			 qedi_conn->iscsi_conn_id);
+		WARN_ON(1);
+	}
+}
+
+static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
+					 struct qedi_conn *qedi_conn,
+					 struct iscsi_task *task,
+					 struct qedi_cmd *qedi_cmd,
+					 struct qedi_work_map *list_work)
+{
+	struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
+	int wait;
+
+	wait  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
+						 ((qedi_cmd->state ==
+						   CLEANUP_RECV) ||
+						 ((qedi_cmd->type == TYPEIO) &&
+						  (cmd->state ==
+						   RESPONSE_RECEIVED))),
+						 5 * HZ);
+	if (!wait) {
+		qedi_cmd->state = CLEANUP_WAIT_FAILED;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+			  "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
+			  cmd->task_id, qedi_conn->iscsi_conn_id);
+
+		return -1;
+	}
+	return 0;
+}
+
+static void qedi_tmf_work(struct work_struct *work)
+{
+	struct qedi_cmd *qedi_cmd =
+		container_of(work, struct qedi_cmd, tmf_work);
+	struct qedi_conn *qedi_conn = qedi_cmd->conn;
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_cls_session *cls_sess;
+	struct qedi_work_map *list_work = NULL;
+	struct iscsi_task *mtask;
+	struct qedi_cmd *cmd;
+	struct iscsi_task *ctask;
+	struct iscsi_tm *tmf_hdr;
+	s16 rval = 0;
+	s16 tid = 0;
+
+	mtask = qedi_cmd->task;
+	tmf_hdr = (struct iscsi_tm *)mtask->hdr;
+	cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
+	set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+
+	ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
+	if (!ctask || !ctask->sc) {
+		QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
+		goto abort_ret;
+	}
+
+	cmd = (struct qedi_cmd *)ctask->dd_data;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
+		  get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
+		  qedi_conn->iscsi_conn_id);
+
+	if (do_not_recover) {
+		QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
+			 do_not_recover);
+		goto abort_ret;
+	}
+
+	list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
+	if (!list_work) {
+		QEDI_ERR(&qedi->dbg_ctx, "Memory alloction failed\n");
+		goto abort_ret;
+	}
+
+	qedi_cmd->type = TYPEIO;
+	list_work->qedi_cmd = qedi_cmd;
+	list_work->rtid = cmd->task_id;
+	list_work->state = QEDI_WORK_SCHEDULED;
+	qedi_cmd->list_tmf_work = list_work;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
+		  list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
+		  tmf_hdr->flags);
+
+	spin_lock_bh(&qedi_conn->tmf_work_lock);
+	list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
+	spin_unlock_bh(&qedi_conn->tmf_work_lock);
+
+	qedi_iscsi_cleanup_task(ctask, false);
+
+	rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
+					     list_work);
+	if (rval == -1) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "FW cleanup got escalated, cid=0x%x\n",
+			  qedi_conn->iscsi_conn_id);
+		goto ldel_exit;
+	}
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1) {
+		QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
+			 qedi_conn->iscsi_conn_id);
+		goto ldel_exit;
+	}
+
+	qedi_cmd->task_id = tid;
+	qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
+
+abort_ret:
+	clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+	return;
+
+ldel_exit:
+	spin_lock_bh(&qedi_conn->tmf_work_lock);
+	if (!qedi_cmd->list_tmf_work) {
+		list_del_init(&list_work->list);
+		qedi_cmd->list_tmf_work = NULL;
+		kfree(list_work);
+	}
+	spin_unlock_bh(&qedi_conn->tmf_work_lock);
+
+	spin_lock(&qedi_conn->list_lock);
+	list_del_init(&cmd->io_cmd);
+	qedi_conn->active_cmd_count--;
+	spin_unlock(&qedi_conn->list_lock);
+
+	clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+}
+
+static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
+			       struct iscsi_task *mtask)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_tmf_request_hdr *fw_tmf_request;
+	struct iscsi_sge *single_sge;
+	struct qedi_cmd *qedi_cmd;
+	struct qedi_cmd *cmd;
+	struct iscsi_task *ctask;
+	struct iscsi_tm *tmf_hdr;
+	struct iscsi_sge *req_sge;
+	struct iscsi_sge *resp_sge;
+	u32 lun[2];
+	s16 tid = 0, ptu_invalidate = 0;
+
+	req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+	resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
+	qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
+	tmf_hdr = (struct iscsi_tm *)mtask->hdr;
+
+	tid = qedi_cmd->task_id;
+	qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+
+	fw_tmf_request = &fw_task_ctx->ystorm_st_context.pdu_hdr.tmf_request;
+	fw_tmf_request->itt = qedi_set_itt(tid, get_itt(mtask->itt));
+	fw_tmf_request->cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
+
+	memcpy(lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
+	fw_tmf_request->lun.lo = be32_to_cpu(lun[0]);
+	fw_tmf_request->lun.hi = be32_to_cpu(lun[1]);
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						qedi->tid_reuse_count[tid]++;
+
+	if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	     ISCSI_TM_FUNC_ABORT_TASK) {
+		ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
+		if (!ctask || !ctask->sc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not get reference task\n");
+			return 0;
+		}
+		cmd = (struct qedi_cmd *)ctask->dd_data;
+		fw_tmf_request->rtt =
+				qedi_set_itt(cmd->task_id,
+					     get_itt(tmf_hdr->rtt));
+	} else {
+		fw_tmf_request->rtt = ISCSI_RESERVED_TAG;
+	}
+
+	fw_tmf_request->opcode = tmf_hdr->opcode;
+	fw_tmf_request->function = tmf_hdr->flags;
+	fw_tmf_request->hdr_second_dword = ntoh24(tmf_hdr->dlength);
+	fw_tmf_request->ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
+
+	single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
+	fw_task_ctx->mstorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+	single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
+	single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
+	single_sge->sge_len = resp_sge->sge_len;
+
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SINGLE_SGE, 1);
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SLOW_IO, 0);
+	fw_task_ctx->mstorm_st_context.sgl_size = 1;
+	fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = 0;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len = 0;
+	fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
+	fw_task_ctx->ustorm_st_context.task_type =  ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+
+	SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+		  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+		  ISCSI_REG1_NUM_FAST_SGES, 0);
+
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+	fw_task_ctx->ustorm_st_context.lun.lo = be32_to_cpu(lun[0]);
+	fw_task_ctx->ustorm_st_context.lun.hi = be32_to_cpu(lun[1]);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "Add TMF to SQ, tmf tid=0x%x, itt=0x%x, cid=0x%x\n",
+		  tid,  mtask->itt, qedi_conn->iscsi_conn_id);
+
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+	qedi_cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, mtask, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+	return 0;
+}
+
+int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *mtask)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_tm *tmf_hdr;
+	struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
+	s16 tid = 0;
+
+	tmf_hdr = (struct iscsi_tm *)mtask->hdr;
+	qedi_cmd->task = mtask;
+
+	/* If abort task then schedule the work and return */
+	if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	    ISCSI_TM_FUNC_ABORT_TASK) {
+		qedi_cmd->state = CLEANUP_WAIT;
+		INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
+		queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
+
+	} else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+		    ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
+		   ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+		    ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
+		   ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+		    ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
+		tid = qedi_get_task_idx(qedi);
+		if (tid == -1) {
+			QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
+				 qedi_conn->iscsi_conn_id);
+			return -1;
+		}
+		qedi_cmd->task_id = tid;
+
+		qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
+
+	} else {
+		QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
+			 qedi_conn->iscsi_conn_id);
+		return -1;
+	}
+
+	return 0;
+}
+
+int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
+			 struct iscsi_task *task)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_text_request_hdr *fw_text_request;
+	struct iscsi_cached_sge_ctx *cached_sge;
+	struct iscsi_sge *single_sge;
+	struct qedi_cmd *qedi_cmd;
+	/* For 6.5 hdr iscsi_hdr */
+	struct iscsi_text *text_hdr;
+	struct iscsi_sge *req_sge;
+	struct iscsi_sge *resp_sge;
+	s16 ptu_invalidate = 0;
+	s16 tid = 0;
+
+	req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+	resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
+	qedi_cmd = (struct qedi_cmd *)task->dd_data;
+	text_hdr = (struct iscsi_text *)task->hdr;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1)
+		return -ENOMEM;
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+
+	qedi_cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_text_request =
+			&fw_task_ctx->ystorm_st_context.pdu_hdr.text_request;
+	fw_text_request->opcode = text_hdr->opcode;
+	fw_text_request->flags_attr = text_hdr->flags;
+
+	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
+	fw_text_request->itt = qedi_set_itt(tid, get_itt(task->itt));
+	fw_text_request->ttt = text_hdr->ttt;
+	fw_text_request->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
+	fw_text_request->exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
+	fw_text_request->hdr_second_dword = ntoh24(text_hdr->dlength);
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						     qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						   qedi->tid_reuse_count[tid]++;
+
+	cached_sge =
+	       &fw_task_ctx->ystorm_st_context.state.sgl_ctx_union.cached_sge;
+	cached_sge->sge.sge_len = req_sge->sge_len;
+	cached_sge->sge.sge_addr.lo = (u32)(qedi_conn->gen_pdu.req_dma_addr);
+	cached_sge->sge.sge_addr.hi =
+			      (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
+
+	/* Mstorm context */
+	single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
+	fw_task_ctx->mstorm_st_context.task_type = 0x2;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+	single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
+	single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
+	single_sge->sge_len = resp_sge->sge_len;
+
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SINGLE_SGE, 1);
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SLOW_IO, 0);
+	fw_task_ctx->mstorm_st_context.sgl_size = 1;
+	fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_ag_context.exp_data_acked =
+						      ntoh24(text_hdr->dlength);
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = resp_sge->sge_len;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len =
+						      ntoh24(text_hdr->dlength);
+	fw_task_ctx->ustorm_st_context.exp_data_sn =
+					      be32_to_cpu(text_hdr->exp_statsn);
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+	fw_task_ctx->ustorm_st_context.task_type = 0x2;
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+
+	/*  Add command in active command list */
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+	qedi_cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+
+	return 0;
+}
+
+int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task,
+			   char *datap, int data_len, int unsol)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_nop_out_hdr *fw_nop_out;
+	struct qedi_cmd *qedi_cmd;
+	/* For 6.5 hdr iscsi_hdr */
+	struct iscsi_nopout *nopout_hdr;
+	struct iscsi_cached_sge_ctx *cached_sge;
+	struct iscsi_sge *single_sge;
+	struct iscsi_sge *req_sge;
+	struct iscsi_sge *resp_sge;
+	u32 lun[2];
+	s16 ptu_invalidate = 0;
+	s16 tid = 0;
+
+	req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+	resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
+	qedi_cmd = (struct qedi_cmd *)task->dd_data;
+	nopout_hdr = (struct iscsi_nopout *)task->hdr;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1) {
+		QEDI_WARN(&qedi->dbg_ctx, "Invalid tid\n");
+		return -ENOMEM;
+	}
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+	qedi_cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_nop_out = &fw_task_ctx->ystorm_st_context.pdu_hdr.nop_out;
+	SET_FIELD(fw_nop_out->flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
+	SET_FIELD(fw_nop_out->flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
+
+	memcpy(lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
+	fw_nop_out->lun.lo = be32_to_cpu(lun[0]);
+	fw_nop_out->lun.hi = be32_to_cpu(lun[1]);
+
+	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
+
+	if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
+		fw_nop_out->itt = be32_to_cpu(nopout_hdr->itt);
+		fw_nop_out->ttt = be32_to_cpu(nopout_hdr->ttt);
+		fw_task_ctx->ystorm_st_context.state.buffer_offset[0] = 0;
+		fw_task_ctx->ystorm_st_context.state.local_comp = 1;
+		SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+			  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 1);
+	} else {
+		fw_nop_out->itt = qedi_set_itt(tid, get_itt(task->itt));
+		fw_nop_out->ttt = ISCSI_TTT_ALL_ONES;
+		fw_task_ctx->ystorm_st_context.state.buffer_offset[0] = 0;
+
+		spin_lock(&qedi_conn->list_lock);
+		list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+		qedi_cmd->io_cmd_in_list = true;
+		qedi_conn->active_cmd_count++;
+		spin_unlock(&qedi_conn->list_lock);
+	}
+
+	fw_nop_out->opcode = ISCSI_OPCODE_NOP_OUT;
+	fw_nop_out->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
+	fw_nop_out->exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
+
+	cached_sge =
+	       &fw_task_ctx->ystorm_st_context.state.sgl_ctx_union.cached_sge;
+	cached_sge->sge.sge_len = req_sge->sge_len;
+	cached_sge->sge.sge_addr.lo = (u32)(qedi_conn->gen_pdu.req_dma_addr);
+	cached_sge->sge.sge_addr.hi =
+			(u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
+
+	/* Mstorm context */
+	fw_task_ctx->mstorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+
+	single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
+	single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
+	single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
+	single_sge->sge_len = resp_sge->sge_len;
+	fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						qedi->tid_reuse_count[tid]++;
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = resp_sge->sge_len;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len = data_len;
+	fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
+	fw_task_ctx->ustorm_st_context.task_type =  ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+
+	SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+		  ISCSI_REG1_NUM_FAST_SGES, 0);
+
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+
+	fw_task_ctx->ustorm_st_context.lun.lo = be32_to_cpu(lun[0]);
+	fw_task_ctx->ustorm_st_context.lun.hi = be32_to_cpu(lun[1]);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+	return 0;
+}
+
+static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
+			 int bd_index)
+{
+	struct iscsi_sge *bd = cmd->io_tbl.sge_tbl;
+	int frag_size, sg_frags;
+
+	sg_frags = 0;
+
+	while (sg_len) {
+		if (addr % QEDI_PAGE_SIZE)
+			frag_size =
+				   (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
+		else
+			frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
+				    (sg_len % QEDI_BD_SPLIT_SZ);
+
+		if (frag_size == 0)
+			frag_size = QEDI_BD_SPLIT_SZ;
+
+		bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
+		bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
+		bd[bd_index + sg_frags].sge_len = (u16)frag_size;
+		QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
+			  "split sge %d: addr=%llx, len=%x",
+			  (bd_index + sg_frags), addr, frag_size);
+
+		addr += (u64)frag_size;
+		sg_frags++;
+		sg_len -= frag_size;
+	}
+	return sg_frags;
+}
+
+static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
+{
+	struct scsi_cmnd *sc = cmd->scsi_cmd;
+	struct iscsi_sge *bd = cmd->io_tbl.sge_tbl;
+	struct scatterlist *sg;
+	int byte_count = 0;
+	int bd_count = 0;
+	int sg_count;
+	int sg_len;
+	int sg_frags;
+	u64 addr, end_addr;
+	int i;
+
+	WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
+
+	sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
+			      scsi_sg_count(sc), sc->sc_data_direction);
+
+	/*
+	 * New condition to send single SGE as cached-SGL.
+	 * Single SGE with length less than 64K.
+	 */
+	sg = scsi_sglist(sc);
+	if ((sg_count == 1) && (sg_dma_len(sg) <= 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].sge_len = (u16)sg_len;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
+			  "single-cashed-sgl: bd_count:%d addr=%llx, len=%x",
+			  sg_count, addr, 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 = (addr + sg_len);
+
+		/*
+		 * first sg elem in the 'list',
+		 * check if end addr is page-aligned.
+		 */
+		if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
+			cmd->use_slowpath = true;
+
+		/*
+		 * last sg elem in the 'list',
+		 * check if start addr is page-aligned.
+		 */
+		else if ((i == (sg_count - 1)) &&
+			 (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
+			cmd->use_slowpath = true;
+
+		/*
+		 * middle sg elements in list,
+		 * check if start and end addr is page-aligned
+		 */
+		else if ((i != 0) && (i != (sg_count - 1)) &&
+			 ((addr % QEDI_PAGE_SIZE) ||
+			 (end_addr % QEDI_PAGE_SIZE)))
+			cmd->use_slowpath = true;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
+			  i, sg_len);
+
+		if (sg_len > QEDI_BD_SPLIT_SZ) {
+			sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
+		} else {
+			sg_frags = 1;
+			bd[bd_count].sge_addr.lo = addr & 0xffffffff;
+			bd[bd_count].sge_addr.hi = addr >> 32;
+			bd[bd_count].sge_len = sg_len;
+		}
+		byte_count += sg_len;
+		bd_count += sg_frags;
+	}
+
+	if (byte_count != scsi_bufflen(sc))
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "byte_count = %d != scsi_bufflen = %d\n", byte_count,
+			 scsi_bufflen(sc));
+	else
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
+			  byte_count);
+
+	WARN_ON(byte_count != scsi_bufflen(sc));
+
+	return bd_count;
+}
+
+static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
+{
+	int bd_count;
+	struct scsi_cmnd *sc = cmd->scsi_cmd;
+
+	if (scsi_sg_count(sc)) {
+		bd_count  = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
+		if (bd_count == 0)
+			return;
+	} else {
+		struct iscsi_sge *bd = cmd->io_tbl.sge_tbl;
+
+		bd[0].sge_addr.lo = 0;
+		bd[0].sge_addr.hi = 0;
+		bd[0].sge_len = 0;
+		bd_count = 0;
+	}
+	cmd->io_tbl.sge_valid = bd_count;
+}
+
+static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
+{
+	u32 dword;
+	int lpcnt;
+	u8 *srcp;
+
+	lpcnt = sc->cmd_len / sizeof(dword);
+	srcp = (u8 *)sc->cmnd;
+	while (lpcnt--) {
+		memcpy(&dword, (const void *)srcp, 4);
+		*dstp = cpu_to_be32(dword);
+		srcp += 4;
+		dstp++;
+	}
+	if (sc->cmd_len & 0x3) {
+		dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
+		*dstp = cpu_to_be32(dword);
+	}
+}
+
+void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
+		   u16 tid, int8_t direction)
+{
+	struct qedi_io_log *io_log;
+	struct iscsi_conn *conn = task->conn;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct scsi_cmnd *sc_cmd = task->sc;
+	unsigned long flags;
+	u8 op;
+
+	spin_lock_irqsave(&qedi->io_trace_lock, flags);
+
+	io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
+	io_log->direction = direction;
+	io_log->task_id = tid;
+	io_log->cid = qedi_conn->iscsi_conn_id;
+	io_log->lun = sc_cmd->device->lun;
+	io_log->op = sc_cmd->cmnd[0];
+	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->fast_sgs = qedi->fast_sgls;
+	io_log->cached_sgs = qedi->cached_sgls;
+	io_log->slow_sgs = qedi->slow_sgls;
+	io_log->cached_sge = qedi->use_cached_sge;
+	io_log->slow_sge = qedi->use_slow_sge;
+	io_log->fast_sge = qedi->use_fast_sge;
+	io_log->result = sc_cmd->result;
+	io_log->jiffies = jiffies;
+	io_log->blk_req_cpu = smp_processor_id();
+
+	if (direction == QEDI_IO_TRACE_REQ) {
+		/* For requests we only care about the submission CPU */
+		io_log->req_cpu = smp_processor_id() % qedi->num_queues;
+		io_log->intr_cpu = 0;
+		io_log->blk_rsp_cpu = 0;
+	} else if (direction == QEDI_IO_TRACE_RSP) {
+		io_log->req_cpu = smp_processor_id() % qedi->num_queues;
+		io_log->intr_cpu = qedi->intr_cpu;
+		io_log->blk_rsp_cpu = smp_processor_id();
+	}
+
+	qedi->io_trace_idx++;
+	if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
+		qedi->io_trace_idx = 0;
+
+	qedi->use_cached_sge = false;
+	qedi->use_slow_sge = false;
+	qedi->use_fast_sge = false;
+
+	spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
+}
+
+int qedi_iscsi_send_ioreq(struct iscsi_task *task)
+{
+	struct iscsi_conn *conn = task->conn;
+	struct iscsi_session *session = conn->session;
+	struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
+	struct qedi_ctx *qedi = iscsi_host_priv(shost);
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_cmd *cmd = task->dd_data;
+	struct scsi_cmnd *sc = task->sc;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_cached_sge_ctx *cached_sge;
+	struct iscsi_phys_sgl_ctx *phys_sgl;
+	struct iscsi_virt_sgl_ctx *virt_sgl;
+	struct ystorm_iscsi_task_st_ctx *yst_cxt;
+	struct mstorm_iscsi_task_st_ctx *mst_cxt;
+	struct iscsi_sgl *sgl_struct;
+	struct iscsi_sge *single_sge;
+	struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
+	struct iscsi_sge *bd = cmd->io_tbl.sge_tbl;
+	enum iscsi_task_type task_type;
+	struct iscsi_cmd_hdr *fw_cmd;
+	u32 lun[2];
+	u32 exp_data;
+	u16 cq_idx = smp_processor_id() % qedi->num_queues;
+	s16 ptu_invalidate = 0;
+	s16 tid = 0;
+	u8 num_fast_sgs;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1)
+		return -ENOMEM;
+
+	qedi_iscsi_map_sg_list(cmd);
+
+	int_to_scsilun(sc->device->lun, (struct scsi_lun *)lun);
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+	cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_cmd = &fw_task_ctx->ystorm_st_context.pdu_hdr.cmd;
+	SET_FIELD(fw_cmd->flags_attr, ISCSI_CMD_HDR_ATTR, ISCSI_ATTR_SIMPLE);
+
+	if (sc->sc_data_direction == DMA_TO_DEVICE) {
+		if (conn->session->initial_r2t_en) {
+			exp_data = min((conn->session->imm_data_en *
+					conn->max_xmit_dlength),
+				       conn->session->first_burst);
+			exp_data = min(exp_data, scsi_bufflen(sc));
+			fw_task_ctx->ustorm_ag_context.exp_data_acked =
+							  cpu_to_le32(exp_data);
+		} else {
+			fw_task_ctx->ustorm_ag_context.exp_data_acked =
+			      min(conn->session->first_burst, scsi_bufflen(sc));
+		}
+
+		SET_FIELD(fw_cmd->flags_attr, ISCSI_CMD_HDR_WRITE, 1);
+		task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
+	} else {
+		if (scsi_bufflen(sc))
+			SET_FIELD(fw_cmd->flags_attr, ISCSI_CMD_HDR_READ, 1);
+		task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
+	}
+
+	fw_cmd->lun.lo = be32_to_cpu(lun[0]);
+	fw_cmd->lun.hi = be32_to_cpu(lun[1]);
+
+	qedi_update_itt_map(qedi, tid, task->itt, cmd);
+	fw_cmd->itt = qedi_set_itt(tid, get_itt(task->itt));
+	fw_cmd->expected_transfer_length = scsi_bufflen(sc);
+	fw_cmd->cmd_sn = be32_to_cpu(hdr->cmdsn);
+	fw_cmd->opcode = hdr->opcode;
+	qedi_cpy_scsi_cdb(sc, (u32 *)fw_cmd->cdb);
+
+	/* Mstorm context */
+	fw_task_ctx->mstorm_st_context.sense_db.lo = (u32)cmd->sense_buffer_dma;
+	fw_task_ctx->mstorm_st_context.sense_db.hi =
+					(u32)((u64)cmd->sense_buffer_dma >> 32);
+	fw_task_ctx->mstorm_ag_context.task_cid = qedi_conn->iscsi_conn_id;
+	fw_task_ctx->mstorm_st_context.task_type = task_type;
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						     qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						   qedi->tid_reuse_count[tid]++;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = scsi_bufflen(sc);
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len = scsi_bufflen(sc);
+	fw_task_ctx->ustorm_st_context.exp_data_sn =
+						   be32_to_cpu(hdr->exp_statsn);
+	fw_task_ctx->ustorm_st_context.task_type = task_type;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = cq_idx;
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+		  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
+
+	num_fast_sgs = (cmd->io_tbl.sge_valid ?
+			min((u16)QEDI_FAST_SGE_COUNT,
+			    (u16)cmd->io_tbl.sge_valid) : 0);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+		  ISCSI_REG1_NUM_FAST_SGES, num_fast_sgs);
+
+	fw_task_ctx->ustorm_st_context.lun.lo = be32_to_cpu(lun[0]);
+	fw_task_ctx->ustorm_st_context.lun.hi = be32_to_cpu(lun[1]);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "Total sge count [%d]\n",
+		  cmd->io_tbl.sge_valid);
+
+	yst_cxt = &fw_task_ctx->ystorm_st_context;
+	mst_cxt = &fw_task_ctx->mstorm_st_context;
+	/* Tx path */
+	if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
+		/* not considering  superIO or FastIO */
+		if (cmd->io_tbl.sge_valid == 1) {
+			cached_sge = &yst_cxt->state.sgl_ctx_union.cached_sge;
+			cached_sge->sge.sge_addr.lo = bd[0].sge_addr.lo;
+			cached_sge->sge.sge_addr.hi = bd[0].sge_addr.hi;
+			cached_sge->sge.sge_len = bd[0].sge_len;
+			qedi->cached_sgls++;
+		} else if ((cmd->io_tbl.sge_valid != 1) && cmd->use_slowpath) {
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 1);
+			SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+				  ISCSI_REG1_NUM_FAST_SGES, 0);
+			phys_sgl = &yst_cxt->state.sgl_ctx_union.phys_sgl;
+			phys_sgl->sgl_base.lo = (u32)(cmd->io_tbl.sge_tbl_dma);
+			phys_sgl->sgl_base.hi =
+				     (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
+			phys_sgl->sgl_size = cmd->io_tbl.sge_valid;
+			qedi->slow_sgls++;
+		} else if ((cmd->io_tbl.sge_valid != 1) && !cmd->use_slowpath) {
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 0);
+			SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+				  ISCSI_REG1_NUM_FAST_SGES,
+				  min((u16)QEDI_FAST_SGE_COUNT,
+				      (u16)cmd->io_tbl.sge_valid));
+			virt_sgl = &yst_cxt->state.sgl_ctx_union.virt_sgl;
+			virt_sgl->sgl_base.lo = (u32)(cmd->io_tbl.sge_tbl_dma);
+			virt_sgl->sgl_base.hi =
+				      (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
+			virt_sgl->sgl_initial_offset =
+				 (u32)bd[0].sge_addr.lo & (QEDI_PAGE_SIZE - 1);
+			qedi->fast_sgls++;
+		}
+		fw_task_ctx->mstorm_st_context.sgl_size = cmd->io_tbl.sge_valid;
+		fw_task_ctx->mstorm_st_context.rem_task_size = scsi_bufflen(sc);
+	} else {
+	/* Rx path */
+		if (cmd->io_tbl.sge_valid == 1) {
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 0);
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SINGLE_SGE, 1);
+			single_sge = &mst_cxt->sgl_union.single_sge;
+			single_sge->sge_addr.lo = bd[0].sge_addr.lo;
+			single_sge->sge_addr.hi = bd[0].sge_addr.hi;
+			single_sge->sge_len = bd[0].sge_len;
+			qedi->cached_sgls++;
+		} else if ((cmd->io_tbl.sge_valid != 1) && cmd->use_slowpath) {
+			sgl_struct = &mst_cxt->sgl_union.sgl_struct;
+			sgl_struct->sgl_addr.lo =
+						(u32)(cmd->io_tbl.sge_tbl_dma);
+			sgl_struct->sgl_addr.hi =
+				     (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 1);
+			SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+				  ISCSI_REG1_NUM_FAST_SGES, 0);
+			sgl_struct->updated_sge_size = 0;
+			sgl_struct->updated_sge_offset = 0;
+			qedi->slow_sgls++;
+		} else if ((cmd->io_tbl.sge_valid != 1) && !cmd->use_slowpath) {
+			sgl_struct = &mst_cxt->sgl_union.sgl_struct;
+			sgl_struct->sgl_addr.lo =
+						(u32)(cmd->io_tbl.sge_tbl_dma);
+			sgl_struct->sgl_addr.hi =
+				     (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
+			sgl_struct->byte_offset =
+				(u32)bd[0].sge_addr.lo & (QEDI_PAGE_SIZE - 1);
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 0);
+			SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+				  ISCSI_REG1_NUM_FAST_SGES, 0);
+			sgl_struct->updated_sge_size = 0;
+			sgl_struct->updated_sge_offset = 0;
+			qedi->fast_sgls++;
+		}
+		fw_task_ctx->mstorm_st_context.sgl_size = cmd->io_tbl.sge_valid;
+		fw_task_ctx->mstorm_st_context.rem_task_size = scsi_bufflen(sc);
+	}
+
+	if (cmd->io_tbl.sge_valid == 1)
+		/* Singel-SGL */
+		qedi->use_cached_sge = true;
+	else {
+		if (cmd->use_slowpath)
+			qedi->use_slow_sge = true;
+		else
+			qedi->use_fast_sge = true;
+	}
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
+		  "%s: %s-SGL: num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x",
+		  (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
+		  "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
+		  "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
+		  (u16)cmd->io_tbl.sge_valid, (u32)(cmd->io_tbl.sge_tbl_dma),
+		  (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
+
+	/*  Add command in active command list */
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
+	cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+	if (qedi_io_tracing)
+		qedi_trace_io(qedi, task, tid, QEDI_IO_TRACE_REQ);
+
+	return 0;
+}
+
+int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
+{
+	struct iscsi_conn *conn = task->conn;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_cmd *cmd = task->dd_data;
+	s16 ptu_invalidate = 0;
+
+	QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
+		  cmd->task_id, get_itt(task->itt), task->state,
+		  cmd->state, qedi_conn->iscsi_conn_id);
+
+	qedi_add_to_sq(qedi_conn, task, cmd->task_id, ptu_invalidate, true);
+	qedi_ring_doorbell(qedi_conn);
+
+	return 0;
+}

drivers/scsi/qedi/qedi_gbl.h

+/*
+ * QLogic iSCSI 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 _QEDI_GBL_H_
+#define _QEDI_GBL_H_
+
+#include "qedi_iscsi.h"
+
+extern uint qedi_io_tracing;
+extern int do_not_recover;
+extern struct scsi_host_template qedi_host_template;
+extern struct iscsi_transport qedi_iscsi_transport;
+extern const struct qed_iscsi_ops *qedi_ops;
+extern struct qedi_debugfs_ops qedi_debugfs_ops;
+extern const struct file_operations qedi_dbg_fops;
+extern struct device_attribute *qedi_shost_attrs[];
+
+int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep);
+void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep);
+
+int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *task);
+int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task);
+int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *mtask);
+int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
+			 struct iscsi_task *task);
+int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task,
+			   char *datap, int data_len, int unsol);
+int qedi_iscsi_send_ioreq(struct iscsi_task *task);
+int qedi_get_task_idx(struct qedi_ctx *qedi);
+void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx);
+int qedi_iscsi_cleanup_task(struct iscsi_task *task,
+			    bool mark_cmd_node_deleted);
+void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd);
+void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
+			 struct qedi_cmd *qedi_cmd);
+void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt);
+void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, int16_t *tid);
+void qedi_process_iscsi_error(struct qedi_endpoint *ep,
+			      struct async_data *data);
+void qedi_start_conn_recovery(struct qedi_ctx *qedi,
+			      struct qedi_conn *qedi_conn);
+struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid);
+void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data);
+void qedi_mark_device_missing(struct iscsi_cls_session *cls_session);
+void qedi_mark_device_available(struct iscsi_cls_session *cls_session);
+void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu);
+int qedi_recover_all_conns(struct qedi_ctx *qedi);
+void qedi_fp_process_cqes(struct qedi_work *work);
+int qedi_cleanup_all_io(struct qedi_ctx *qedi,
+			struct qedi_conn *qedi_conn,
+			struct iscsi_task *task, bool in_recovery);
+void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
+		   u16 tid, int8_t direction);
+int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id);
+u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl);
+void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id);
+int qedi_create_sysfs_ctx_attr(struct qedi_ctx *qedi);
+void qedi_remove_sysfs_ctx_attr(struct qedi_ctx *qedi);
+void qedi_clearsq(struct qedi_ctx *qedi,
+		  struct qedi_conn *qedi_conn,
+		  struct iscsi_task *task);
+
+#endif

drivers/scsi/qedi/qedi_hsi.h

+/*
+ * QLogic iSCSI 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 __QEDI_HSI__
+#define __QEDI_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 TCP target
+ */
+#include <linux/qed/tcp_common.h>
+
+/*
+ * Add include to common iSCSI target for both eCore and protocol driver
+ */
+#include <linux/qed/iscsi_common.h>
+
+/*
+ * iSCSI CMDQ element
+ */
+struct iscsi_cmdqe {
+	__le16 conn_id;
+	u8 invalid_command;
+	u8 cmd_hdr_type;
+	__le32 reserved1[2];
+	__le32 cmd_payload[13];
+};
+
+/*
+ * iSCSI CMD header type
+ */
+enum iscsi_cmd_hdr_type {
+	ISCSI_CMD_HDR_TYPE_BHS_ONLY /* iSCSI BHS with no expected AHS */,
+	ISCSI_CMD_HDR_TYPE_BHS_W_AHS /* iSCSI BHS with expected AHS */,
+	ISCSI_CMD_HDR_TYPE_AHS /* iSCSI AHS */,
+	MAX_ISCSI_CMD_HDR_TYPE
+};
+
+#endif /* __QEDI_HSI__ */

drivers/scsi/qedi/qedi_iscsi.c

+/*
+ * QLogic iSCSI 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/blkdev.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <scsi/scsi_tcq.h>
+
+#include "qedi.h"
+#include "qedi_iscsi.h"
+#include "qedi_gbl.h"
+
+int qedi_recover_all_conns(struct qedi_ctx *qedi)
+{
+	struct qedi_conn *qedi_conn;
+	int i;
+
+	for (i = 0; i < qedi->max_active_conns; i++) {
+		qedi_conn = qedi_get_conn_from_id(qedi, i);
+		if (!qedi_conn)
+			continue;
+
+		qedi_start_conn_recovery(qedi, qedi_conn);
+	}
+
+	return SUCCESS;
+}
+
+static int qedi_eh_host_reset(struct scsi_cmnd *cmd)
+{
+	struct Scsi_Host *shost = cmd->device->host;
+	struct qedi_ctx *qedi;
+
+	qedi = iscsi_host_priv(shost);
+
+	return qedi_recover_all_conns(qedi);
+}
+
+struct scsi_host_template qedi_host_template = {
+	.module = THIS_MODULE,
+	.name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver",
+	.proc_name = QEDI_MODULE_NAME,
+	.queuecommand = iscsi_queuecommand,
+	.eh_abort_handler = iscsi_eh_abort,
+	.eh_device_reset_handler = iscsi_eh_device_reset,
+	.eh_target_reset_handler = iscsi_eh_recover_target,
+	.eh_host_reset_handler = qedi_eh_host_reset,
+	.target_alloc = iscsi_target_alloc,
+	.change_queue_depth = scsi_change_queue_depth,
+	.can_queue = QEDI_MAX_ISCSI_TASK,
+	.this_id = -1,
+	.sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD,
+	.max_sectors = 0xffff,
+	.cmd_per_lun = 128,
+	.use_clustering = ENABLE_CLUSTERING,
+	.shost_attrs = qedi_shost_attrs,
+};
+
+static void qedi_conn_free_login_resources(struct qedi_ctx *qedi,
+					   struct qedi_conn *qedi_conn)
+{
+	if (qedi_conn->gen_pdu.resp_bd_tbl) {
+		dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+				  qedi_conn->gen_pdu.resp_bd_tbl,
+				  qedi_conn->gen_pdu.resp_bd_dma);
+		qedi_conn->gen_pdu.resp_bd_tbl = NULL;
+	}
+
+	if (qedi_conn->gen_pdu.req_bd_tbl) {
+		dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+				  qedi_conn->gen_pdu.req_bd_tbl,
+				  qedi_conn->gen_pdu.req_bd_dma);
+		qedi_conn->gen_pdu.req_bd_tbl = NULL;
+	}
+
+	if (qedi_conn->gen_pdu.resp_buf) {
+		dma_free_coherent(&qedi->pdev->dev,
+				  ISCSI_DEF_MAX_RECV_SEG_LEN,
+				  qedi_conn->gen_pdu.resp_buf,
+				  qedi_conn->gen_pdu.resp_dma_addr);
+		qedi_conn->gen_pdu.resp_buf = NULL;
+	}
+
+	if (qedi_conn->gen_pdu.req_buf) {
+		dma_free_coherent(&qedi->pdev->dev,
+				  ISCSI_DEF_MAX_RECV_SEG_LEN,
+				  qedi_conn->gen_pdu.req_buf,
+				  qedi_conn->gen_pdu.req_dma_addr);
+		qedi_conn->gen_pdu.req_buf = NULL;
+	}
+}
+
+static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi,
+					   struct qedi_conn *qedi_conn)
+{
+	qedi_conn->gen_pdu.req_buf =
+		dma_alloc_coherent(&qedi->pdev->dev,
+				   ISCSI_DEF_MAX_RECV_SEG_LEN,
+				   &qedi_conn->gen_pdu.req_dma_addr,
+				   GFP_KERNEL);
+	if (!qedi_conn->gen_pdu.req_buf)
+		goto login_req_buf_failure;
+
+	qedi_conn->gen_pdu.req_buf_size = 0;
+	qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf;
+
+	qedi_conn->gen_pdu.resp_buf =
+		dma_alloc_coherent(&qedi->pdev->dev,
+				   ISCSI_DEF_MAX_RECV_SEG_LEN,
+				   &qedi_conn->gen_pdu.resp_dma_addr,
+				   GFP_KERNEL);
+	if (!qedi_conn->gen_pdu.resp_buf)
+		goto login_resp_buf_failure;
+
+	qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
+	qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf;
+
+	qedi_conn->gen_pdu.req_bd_tbl =
+		dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+				   &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
+	if (!qedi_conn->gen_pdu.req_bd_tbl)
+		goto login_req_bd_tbl_failure;
+
+	qedi_conn->gen_pdu.resp_bd_tbl =
+		dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+				   &qedi_conn->gen_pdu.resp_bd_dma,
+				   GFP_KERNEL);
+	if (!qedi_conn->gen_pdu.resp_bd_tbl)
+		goto login_resp_bd_tbl_failure;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS,
+		  "Allocation successful, cid=0x%x\n",
+		  qedi_conn->iscsi_conn_id);
+	return 0;
+
+login_resp_bd_tbl_failure:
+	dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+			  qedi_conn->gen_pdu.req_bd_tbl,
+			  qedi_conn->gen_pdu.req_bd_dma);
+	qedi_conn->gen_pdu.req_bd_tbl = NULL;
+
+login_req_bd_tbl_failure:
+	dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
+			  qedi_conn->gen_pdu.resp_buf,
+			  qedi_conn->gen_pdu.resp_dma_addr);
+	qedi_conn->gen_pdu.resp_buf = NULL;
+login_resp_buf_failure:
+	dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
+			  qedi_conn->gen_pdu.req_buf,
+			  qedi_conn->gen_pdu.req_dma_addr);
+	qedi_conn->gen_pdu.req_buf = NULL;
+login_req_buf_failure:
+	iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data,
+			  "login resource alloc failed!!\n");
+	return -ENOMEM;
+}
+
+static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi,
+				  struct iscsi_session *session)
+{
+	int i;
+
+	for (i = 0; i < session->cmds_max; i++) {
+		struct iscsi_task *task = session->cmds[i];
+		struct qedi_cmd *cmd = task->dd_data;
+
+		if (cmd->io_tbl.sge_tbl)
+			dma_free_coherent(&qedi->pdev->dev,
+					  QEDI_ISCSI_MAX_BDS_PER_CMD *
+					  sizeof(struct iscsi_sge),
+					  cmd->io_tbl.sge_tbl,
+					  cmd->io_tbl.sge_tbl_dma);
+
+		if (cmd->sense_buffer)
+			dma_free_coherent(&qedi->pdev->dev,
+					  SCSI_SENSE_BUFFERSIZE,
+					  cmd->sense_buffer,
+					  cmd->sense_buffer_dma);
+	}
+}
+
+static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session,
+			   struct qedi_cmd *cmd)
+{
+	struct qedi_io_bdt *io = &cmd->io_tbl;
+	struct iscsi_sge *sge;
+
+	io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev,
+					 QEDI_ISCSI_MAX_BDS_PER_CMD *
+					 sizeof(*sge),
+					 &io->sge_tbl_dma, GFP_KERNEL);
+	if (!io->sge_tbl) {
+		iscsi_session_printk(KERN_ERR, session,
+				     "Could not allocate BD table.\n");
+		return -ENOMEM;
+	}
+
+	io->sge_valid = 0;
+	return 0;
+}
+
+static int qedi_setup_cmd_pool(struct qedi_ctx *qedi,
+			       struct iscsi_session *session)
+{
+	int i;
+
+	for (i = 0; i < session->cmds_max; i++) {
+		struct iscsi_task *task = session->cmds[i];
+		struct qedi_cmd *cmd = task->dd_data;
+
+		task->hdr = &cmd->hdr;
+		task->hdr_max = sizeof(struct iscsi_hdr);
+
+		if (qedi_alloc_sget(qedi, session, cmd))
+			goto free_sgets;
+
+		cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev,
+						       SCSI_SENSE_BUFFERSIZE,
+						       &cmd->sense_buffer_dma,
+						       GFP_KERNEL);
+		if (!cmd->sense_buffer)
+			goto free_sgets;
+	}
+
+	return 0;
+
+free_sgets:
+	qedi_destroy_cmd_pool(qedi, session);
+	return -ENOMEM;
+}
+
+static struct iscsi_cls_session *
+qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max,
+		    u16 qdepth, uint32_t initial_cmdsn)
+{
+	struct Scsi_Host *shost;
+	struct iscsi_cls_session *cls_session;
+	struct qedi_ctx *qedi;
+	struct qedi_endpoint *qedi_ep;
+
+	if (!ep)
+		return NULL;
+
+	qedi_ep = ep->dd_data;
+	shost = qedi_ep->qedi->shost;
+	qedi = iscsi_host_priv(shost);
+
+	if (cmds_max > qedi->max_sqes)
+		cmds_max = qedi->max_sqes;
+	else if (cmds_max < QEDI_SQ_WQES_MIN)
+		cmds_max = QEDI_SQ_WQES_MIN;
+
+	cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost,
+					  cmds_max, 0, sizeof(struct qedi_cmd),
+					  initial_cmdsn, ISCSI_MAX_TARGET);
+	if (!cls_session) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failed to setup session for ep=%p\n", qedi_ep);
+		return NULL;
+	}
+
+	if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failed to setup cmd pool for ep=%p\n", qedi_ep);
+		goto session_teardown;
+	}
+
+	return cls_session;
+
+session_teardown:
+	iscsi_session_teardown(cls_session);
+	return NULL;
+}
+
+static void qedi_session_destroy(struct iscsi_cls_session *cls_session)
+{
+	struct iscsi_session *session = cls_session->dd_data;
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct qedi_ctx *qedi = iscsi_host_priv(shost);
+
+	qedi_destroy_cmd_pool(qedi, session);
+	iscsi_session_teardown(cls_session);
+}
+
+static struct iscsi_cls_conn *
+qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
+{
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct qedi_ctx *qedi = iscsi_host_priv(shost);
+	struct iscsi_cls_conn *cls_conn;
+	struct qedi_conn *qedi_conn;
+	struct iscsi_conn *conn;
+
+	cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn),
+				    cid);
+	if (!cls_conn) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n",
+			 cid, cls_session);
+		return NULL;
+	}
+
+	conn = cls_conn->dd_data;
+	qedi_conn = conn->dd_data;
+	qedi_conn->cls_conn = cls_conn;
+	qedi_conn->qedi = qedi;
+	qedi_conn->ep = NULL;
+	qedi_conn->active_cmd_count = 0;
+	INIT_LIST_HEAD(&qedi_conn->active_cmd_list);
+	spin_lock_init(&qedi_conn->list_lock);
+
+	if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) {
+		iscsi_conn_printk(KERN_ALERT, conn,
+				  "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n",
+				   cid, cls_session);
+		goto free_conn;
+	}
+
+	return cls_conn;
+
+free_conn:
+	iscsi_conn_teardown(cls_conn);
+	return NULL;
+}
+
+void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
+{
+	iscsi_block_session(cls_session);
+}
+
+void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
+{
+	iscsi_unblock_session(cls_session);
+}
+
+static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi,
+				       struct qedi_conn *qedi_conn)
+{
+	u32 iscsi_cid = qedi_conn->iscsi_conn_id;
+
+	if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) {
+		iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
+				  "conn bind - entry #%d not free\n",
+				  iscsi_cid);
+		return -EBUSY;
+	}
+
+	qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn;
+	return 0;
+}
+
+struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid)
+{
+	if (!qedi->cid_que.conn_cid_tbl) {
+		QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n");
+		return NULL;
+
+	} else if (iscsi_cid >= qedi->max_active_conns) {
+		QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid);
+		return NULL;
+	}
+	return qedi->cid_que.conn_cid_tbl[iscsi_cid];
+}
+
+static int qedi_conn_bind(struct iscsi_cls_session *cls_session,
+			  struct iscsi_cls_conn *cls_conn,
+			  u64 transport_fd, int is_leading)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct qedi_ctx *qedi = iscsi_host_priv(shost);
+	struct qedi_endpoint *qedi_ep;
+	struct iscsi_endpoint *ep;
+
+	ep = iscsi_lookup_endpoint(transport_fd);
+	if (!ep)
+		return -EINVAL;
+
+	qedi_ep = ep->dd_data;
+	if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) ||
+	    (qedi_ep->state == EP_STATE_TCP_RST_RCVD))
+		return -EINVAL;
+
+	if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
+		return -EINVAL;
+
+	qedi_ep->conn = qedi_conn;
+	qedi_conn->ep = qedi_ep;
+	qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
+	qedi_conn->fw_cid = qedi_ep->fw_cid;
+	qedi_conn->cmd_cleanup_req = 0;
+	qedi_conn->cmd_cleanup_cmpl = 0;
+
+	if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
+		return -EINVAL;
+
+	spin_lock_init(&qedi_conn->tmf_work_lock);
+	INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
+	init_waitqueue_head(&qedi_conn->wait_queue);
+	return 0;
+}
+
+static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
+				  struct qedi_conn *qedi_conn)
+{
+	struct qed_iscsi_params_update *conn_info;
+	struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qedi_endpoint *qedi_ep;
+	int rval;
+
+	qedi_ep = qedi_conn->ep;
+
+	conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
+	if (!conn_info) {
+		QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
+		return -ENOMEM;
+	}
+
+	conn_info->update_flag = 0;
+
+	if (conn->hdrdgst_en)
+		SET_FIELD(conn_info->update_flag,
+			  ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
+	if (conn->datadgst_en)
+		SET_FIELD(conn_info->update_flag,
+			  ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
+	if (conn->session->initial_r2t_en)
+		SET_FIELD(conn_info->update_flag,
+			  ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
+			  true);
+	if (conn->session->imm_data_en)
+		SET_FIELD(conn_info->update_flag,
+			  ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
+			  true);
+
+	conn_info->max_seq_size = conn->session->max_burst;
+	conn_info->max_recv_pdu_length = conn->max_recv_dlength;
+	conn_info->max_send_pdu_length = conn->max_xmit_dlength;
+	conn_info->first_seq_length = conn->session->first_burst;
+	conn_info->exp_stat_sn = conn->exp_statsn;
+
+	rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
+				     conn_info);
+	if (rval) {
+		rval = -ENXIO;
+		QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
+		goto update_conn_err;
+	}
+
+	kfree(conn_info);
+	rval = 0;
+
+update_conn_err:
+	return rval;
+}
+
+static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
+{
+	u16 mss = 0;
+	u16 hdrs = TCP_HDR_LEN;
+
+	if (is_ipv6)
+		hdrs += IPV6_HDR_LEN;
+	else
+		hdrs += IPV4_HDR_LEN;
+
+	if (vlan_en)
+		hdrs += VLAN_LEN;
+
+	mss = pmtu - hdrs;
+
+	if (tcp_ts_en)
+		mss -= TCP_OPTION_LEN;
+
+	if (!mss)
+		mss = DEF_MSS;
+
+	return mss;
+}
+
+static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
+{
+	struct qedi_ctx *qedi = qedi_ep->qedi;
+	struct qed_iscsi_params_offload *conn_info;
+	int rval;
+	int i;
+
+	conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
+	if (!conn_info) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failed to allocate memory ep=%p\n", qedi_ep);
+		return -ENOMEM;
+	}
+
+	ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
+	ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
+
+	conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
+	conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
+
+	if (qedi_ep->ip_type == TCP_IPV4) {
+		conn_info->ip_version = 0;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
+			  qedi_ep->src_addr, qedi_ep->dst_addr);
+	} else {
+		for (i = 1; i < 4; i++) {
+			conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
+			conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
+		}
+
+		conn_info->ip_version = 1;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
+			  qedi_ep->src_addr, qedi_ep->dst_addr);
+	}
+
+	conn_info->src.port = qedi_ep->src_port;
+	conn_info->dst.port = qedi_ep->dst_port;
+
+	conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
+	conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
+	conn_info->vlan_id = qedi_ep->vlan_id;
+
+	SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
+	SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
+	SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
+	SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
+
+	conn_info->default_cq = (qedi_ep->fw_cid % 8);
+
+	conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
+	conn_info->dup_ack_theshold = 3;
+	conn_info->rcv_wnd = 65535;
+	conn_info->cwnd = DEF_MAX_CWND;
+
+	conn_info->ss_thresh = 65535;
+	conn_info->srtt = 300;
+	conn_info->rtt_var = 150;
+	conn_info->flow_label = 0;
+	conn_info->ka_timeout = DEF_KA_TIMEOUT;
+	conn_info->ka_interval = DEF_KA_INTERVAL;
+	conn_info->max_rt_time = DEF_MAX_RT_TIME;
+	conn_info->ttl = DEF_TTL;
+	conn_info->tos_or_tc = DEF_TOS;
+	conn_info->remote_port = qedi_ep->dst_port;
+	conn_info->local_port = qedi_ep->src_port;
+
+	conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
+				       (qedi_ep->ip_type == TCP_IPV6),
+				       1, (qedi_ep->vlan_id != 0));
+
+	conn_info->rcv_wnd_scale = 4;
+	conn_info->ts_ticks_per_second = 1000;
+	conn_info->da_timeout_value = 200;
+	conn_info->ack_frequency = 2;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "Default cq index [%d], mss [%d]\n",
+		  conn_info->default_cq, conn_info->mss);
+
+	rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
+	if (rval)
+		QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
+			 rval, qedi_ep);
+
+	kfree(conn_info);
+	return rval;
+}
+
+static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_ctx *qedi;
+	int rval;
+
+	qedi = qedi_conn->qedi;
+
+	rval = qedi_iscsi_update_conn(qedi, qedi_conn);
+	if (rval) {
+		iscsi_conn_printk(KERN_ALERT, conn,
+				  "conn_start: FW oflload conn failed.\n");
+		rval = -EINVAL;
+		goto start_err;
+	}
+
+	clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+	qedi_conn->abrt_conn = 0;
+
+	rval = iscsi_conn_start(cls_conn);
+	if (rval) {
+		iscsi_conn_printk(KERN_ALERT, conn,
+				  "iscsi_conn_start: FW oflload conn failed!!\n");
+	}
+
+start_err:
+	return rval;
+}
+
+static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct Scsi_Host *shost;
+	struct qedi_ctx *qedi;
+
+	shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
+	qedi = iscsi_host_priv(shost);
+
+	qedi_conn_free_login_resources(qedi, qedi_conn);
+	iscsi_conn_teardown(cls_conn);
+}
+
+static int qedi_ep_get_param(struct iscsi_endpoint *ep,
+			     enum iscsi_param param, char *buf)
+{
+	struct qedi_endpoint *qedi_ep = ep->dd_data;
+	int len;
+
+	if (!qedi_ep)
+		return -ENOTCONN;
+
+	switch (param) {
+	case ISCSI_PARAM_CONN_PORT:
+		len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
+		break;
+	case ISCSI_PARAM_CONN_ADDRESS:
+		if (qedi_ep->ip_type == TCP_IPV4)
+			len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
+		else
+			len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
+		break;
+	default:
+		return -ENOTCONN;
+	}
+
+	return len;
+}
+
+static int qedi_host_get_param(struct Scsi_Host *shost,
+			       enum iscsi_host_param param, char *buf)
+{
+	struct qedi_ctx *qedi;
+	int len;
+
+	qedi = iscsi_host_priv(shost);
+
+	switch (param) {
+	case ISCSI_HOST_PARAM_HWADDRESS:
+		len = sysfs_format_mac(buf, qedi->mac, 6);
+		break;
+	case ISCSI_HOST_PARAM_NETDEV_NAME:
+		len = sprintf(buf, "host%d\n", shost->host_no);
+		break;
+	case ISCSI_HOST_PARAM_IPADDRESS:
+		if (qedi->ip_type == TCP_IPV4)
+			len = sprintf(buf, "%pI4\n", qedi->src_ip);
+		else
+			len = sprintf(buf, "%pI6\n", qedi->src_ip);
+		break;
+	default:
+		return iscsi_host_get_param(shost, param, buf);
+	}
+
+	return len;
+}
+
+static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
+				struct iscsi_stats *stats)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qed_iscsi_stats iscsi_stats;
+	struct Scsi_Host *shost;
+	struct qedi_ctx *qedi;
+
+	shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
+	qedi = iscsi_host_priv(shost);
+	qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
+
+	conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
+	conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
+	conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
+	conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
+	conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
+
+	stats->txdata_octets = conn->txdata_octets;
+	stats->rxdata_octets = conn->rxdata_octets;
+	stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
+	stats->dataout_pdus = conn->dataout_pdus_cnt;
+	stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
+	stats->datain_pdus = conn->datain_pdus_cnt;
+	stats->r2t_pdus = conn->r2t_pdus_cnt;
+	stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
+	stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
+	stats->digest_err = 0;
+	stats->timeout_err = 0;
+	strcpy(stats->custom[0].desc, "eh_abort_cnt");
+	stats->custom[0].value = conn->eh_abort_cnt;
+	stats->custom_length = 1;
+}
+
+static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
+{
+	struct iscsi_sge *bd_tbl;
+
+	bd_tbl = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+
+	bd_tbl->sge_addr.hi =
+		(u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
+	bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
+	bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
+				qedi_conn->gen_pdu.req_buf;
+	bd_tbl->reserved0 = 0;
+	bd_tbl = (struct iscsi_sge  *)qedi_conn->gen_pdu.resp_bd_tbl;
+	bd_tbl->sge_addr.hi =
+			(u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
+	bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
+	bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
+	bd_tbl->reserved0 = 0;
+}
+
+static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
+{
+	struct qedi_cmd *cmd = task->dd_data;
+	struct qedi_conn *qedi_conn = cmd->conn;
+	char *buf;
+	int data_len;
+	int rc = 0;
+
+	qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
+	switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
+	case ISCSI_OP_LOGIN:
+		qedi_send_iscsi_login(qedi_conn, task);
+		break;
+	case ISCSI_OP_NOOP_OUT:
+		data_len = qedi_conn->gen_pdu.req_buf_size;
+		buf = qedi_conn->gen_pdu.req_buf;
+		if (data_len)
+			rc = qedi_send_iscsi_nopout(qedi_conn, task,
+						    buf, data_len, 1);
+		else
+			rc = qedi_send_iscsi_nopout(qedi_conn, task,
+						    NULL, 0, 1);
+		break;
+	case ISCSI_OP_LOGOUT:
+		rc = qedi_send_iscsi_logout(qedi_conn, task);
+		break;
+	case ISCSI_OP_SCSI_TMFUNC:
+		rc = qedi_iscsi_abort_work(qedi_conn, task);
+		break;
+	case ISCSI_OP_TEXT:
+		rc = qedi_send_iscsi_text(qedi_conn, task);
+		break;
+	default:
+		iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
+				  "unsupported op 0x%x\n", task->hdr->opcode);
+	}
+
+	return rc;
+}
+
+static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
+{
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_cmd *cmd = task->dd_data;
+
+	memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
+
+	qedi_conn->gen_pdu.req_buf_size = task->data_count;
+
+	if (task->data_count) {
+		memcpy(qedi_conn->gen_pdu.req_buf, task->data,
+		       task->data_count);
+		qedi_conn->gen_pdu.req_wr_ptr =
+			qedi_conn->gen_pdu.req_buf + task->data_count;
+	}
+
+	cmd->conn = conn->dd_data;
+	cmd->scsi_cmd = NULL;
+	return qedi_iscsi_send_generic_request(task);
+}
+
+static int qedi_task_xmit(struct iscsi_task *task)
+{
+	struct iscsi_conn *conn = task->conn;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_cmd *cmd = task->dd_data;
+	struct scsi_cmnd *sc = task->sc;
+
+	cmd->state = 0;
+	cmd->task = NULL;
+	cmd->use_slowpath = false;
+	cmd->conn = qedi_conn;
+	cmd->task = task;
+	cmd->io_cmd_in_list = false;
+	INIT_LIST_HEAD(&cmd->io_cmd);
+
+	if (!sc)
+		return qedi_mtask_xmit(conn, task);
+
+	cmd->scsi_cmd = sc;
+	return qedi_iscsi_send_ioreq(task);
+}
+
+static struct iscsi_endpoint *
+qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
+		int non_blocking)
+{
+	struct qedi_ctx *qedi;
+	struct iscsi_endpoint *ep;
+	struct qedi_endpoint *qedi_ep;
+	struct sockaddr_in *addr;
+	struct sockaddr_in6 *addr6;
+	struct qed_dev *cdev  =  NULL;
+	struct qedi_uio_dev *udev = NULL;
+	struct iscsi_path path_req;
+	u32 msg_type = ISCSI_KEVENT_IF_DOWN;
+	u32 iscsi_cid = QEDI_CID_RESERVED;
+	u16 len = 0;
+	char *buf = NULL;
+	int ret;
+
+	if (!shost) {
+		ret = -ENXIO;
+		QEDI_ERR(NULL, "shost is NULL\n");
+		return ERR_PTR(ret);
+	}
+
+	if (do_not_recover) {
+		ret = -ENOMEM;
+		return ERR_PTR(ret);
+	}
+
+	qedi = iscsi_host_priv(shost);
+	cdev = qedi->cdev;
+	udev = qedi->udev;
+
+	if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
+	    test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
+		ret = -ENOMEM;
+		return ERR_PTR(ret);
+	}
+
+	ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
+	if (!ep) {
+		QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
+		ret = -ENOMEM;
+		return ERR_PTR(ret);
+	}
+	qedi_ep = ep->dd_data;
+	memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
+	qedi_ep->state = EP_STATE_IDLE;
+	qedi_ep->iscsi_cid = (u32)-1;
+	qedi_ep->qedi = qedi;
+
+	if (dst_addr->sa_family == AF_INET) {
+		addr = (struct sockaddr_in *)dst_addr;
+		memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
+		       sizeof(struct in_addr));
+		qedi_ep->dst_port = ntohs(addr->sin_port);
+		qedi_ep->ip_type = TCP_IPV4;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "dst_addr=%pI4, dst_port=%u\n",
+			  qedi_ep->dst_addr, qedi_ep->dst_port);
+	} else if (dst_addr->sa_family == AF_INET6) {
+		addr6 = (struct sockaddr_in6 *)dst_addr;
+		memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
+		       sizeof(struct in6_addr));
+		qedi_ep->dst_port = ntohs(addr6->sin6_port);
+		qedi_ep->ip_type = TCP_IPV6;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "dst_addr=%pI6, dst_port=%u\n",
+			  qedi_ep->dst_addr, qedi_ep->dst_port);
+	} else {
+		QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
+	}
+
+	if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
+		QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
+		ret = -ENXIO;
+		goto ep_conn_exit;
+	}
+
+	ret = qedi_alloc_sq(qedi, qedi_ep);
+	if (ret)
+		goto ep_conn_exit;
+
+	ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
+				     &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
+
+	if (ret) {
+		QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
+		ret = -ENXIO;
+		goto ep_free_sq;
+	}
+
+	iscsi_cid = qedi_ep->handle;
+	qedi_ep->iscsi_cid = iscsi_cid;
+
+	init_waitqueue_head(&qedi_ep->ofld_wait);
+	init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
+	qedi_ep->state = EP_STATE_OFLDCONN_START;
+	qedi->ep_tbl[iscsi_cid] = qedi_ep;
+
+	buf = (char *)&path_req;
+	len = sizeof(path_req);
+	memset(&path_req, 0, len);
+
+	msg_type = ISCSI_KEVENT_PATH_REQ;
+	path_req.handle = (u64)qedi_ep->iscsi_cid;
+	path_req.pmtu = qedi->ll2_mtu;
+	qedi_ep->pmtu = qedi->ll2_mtu;
+	if (qedi_ep->ip_type == TCP_IPV4) {
+		memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
+		       sizeof(struct in_addr));
+		path_req.ip_addr_len = 4;
+	} else {
+		memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
+		       sizeof(struct in6_addr));
+		path_req.ip_addr_len = 16;
+	}
+
+	ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
+				 len);
+	if (ret) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
+			 iscsi_cid, ret);
+		goto ep_rel_conn;
+	}
+
+	atomic_inc(&qedi->num_offloads);
+	return ep;
+
+ep_rel_conn:
+	qedi->ep_tbl[iscsi_cid] = NULL;
+	ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
+	if (ret)
+		QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
+			  ret);
+ep_free_sq:
+	qedi_free_sq(qedi, qedi_ep);
+ep_conn_exit:
+	iscsi_destroy_endpoint(ep);
+	return ERR_PTR(ret);
+}
+
+static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
+{
+	struct qedi_endpoint *qedi_ep;
+	int ret = 0;
+
+	if (do_not_recover)
+		return 1;
+
+	qedi_ep = ep->dd_data;
+	if (qedi_ep->state == EP_STATE_IDLE ||
+	    qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
+		return -1;
+
+	if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
+		ret = 1;
+
+	ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
+					       QEDI_OFLD_WAIT_STATE(qedi_ep),
+					       msecs_to_jiffies(timeout_ms));
+
+	if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
+		ret = -1;
+
+	if (ret > 0)
+		return 1;
+	else if (!ret)
+		return 0;
+	else
+		return ret;
+}
+
+static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
+{
+	struct qedi_cmd *cmd, *cmd_tmp;
+
+	list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
+				 io_cmd) {
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	}
+}
+
+static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
+{
+	struct qedi_endpoint *qedi_ep;
+	struct qedi_conn *qedi_conn = NULL;
+	struct iscsi_conn *conn = NULL;
+	struct qedi_ctx *qedi;
+	int ret = 0;
+	int wait_delay = 20 * HZ;
+	int abrt_conn = 0;
+	int count = 10;
+
+	qedi_ep = ep->dd_data;
+	qedi = qedi_ep->qedi;
+
+	flush_work(&qedi_ep->offload_work);
+
+	if (qedi_ep->conn) {
+		qedi_conn = qedi_ep->conn;
+		conn = qedi_conn->cls_conn->dd_data;
+		iscsi_suspend_queue(conn);
+		abrt_conn = qedi_conn->abrt_conn;
+
+		while (count--)	{
+			if (!test_bit(QEDI_CONN_FW_CLEANUP,
+				      &qedi_conn->flags)) {
+				break;
+			}
+			msleep(1000);
+		}
+
+		if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
+			if (do_not_recover) {
+				QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+					  "Do not recover cid=0x%x\n",
+					  qedi_ep->iscsi_cid);
+				goto ep_exit_recover;
+			}
+			QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+				  "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
+				  qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
+			qedi_cleanup_active_cmd_list(qedi_conn);
+			goto ep_release_conn;
+		}
+	}
+
+	if (do_not_recover)
+		goto ep_exit_recover;
+
+	switch (qedi_ep->state) {
+	case EP_STATE_OFLDCONN_START:
+		goto ep_release_conn;
+	case EP_STATE_OFLDCONN_FAILED:
+			break;
+	case EP_STATE_OFLDCONN_COMPL:
+		if (unlikely(!qedi_conn))
+			break;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
+			  qedi_conn->active_cmd_count, abrt_conn,
+			  qedi_ep->state,
+			  qedi_ep->iscsi_cid,
+			  qedi_ep->conn
+			  );
+
+		if (!qedi_conn->active_cmd_count)
+			abrt_conn = 0;
+		else
+			abrt_conn = 1;
+
+		if (abrt_conn)
+			qedi_clearsq(qedi, qedi_conn, NULL);
+		break;
+	default:
+		break;
+	}
+
+	qedi_ep->state = EP_STATE_DISCONN_START;
+	ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
+	if (ret) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "destroy_conn failed returned %d\n", ret);
+	} else {
+		ret = wait_event_interruptible_timeout(
+					qedi_ep->tcp_ofld_wait,
+					(qedi_ep->state !=
+					 EP_STATE_DISCONN_START),
+					wait_delay);
+		if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
+			QEDI_WARN(&qedi->dbg_ctx,
+				  "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
+				  ret, wait_delay, qedi_ep->iscsi_cid);
+		}
+	}
+
+ep_release_conn:
+	ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
+	if (ret)
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "release_conn returned %d, cid=0x%x\n",
+			  ret, qedi_ep->iscsi_cid);
+ep_exit_recover:
+	qedi_ep->state = EP_STATE_IDLE;
+	qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
+	qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
+	qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
+	qedi_free_sq(qedi, qedi_ep);
+
+	if (qedi_conn)
+		qedi_conn->ep = NULL;
+
+	qedi_ep->conn = NULL;
+	qedi_ep->qedi = NULL;
+	atomic_dec(&qedi->num_offloads);
+
+	iscsi_destroy_endpoint(ep);
+}
+
+static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
+{
+	struct qed_dev *cdev = qedi->cdev;
+	struct qedi_uio_dev *udev;
+	struct qedi_uio_ctrl *uctrl;
+	struct sk_buff *skb;
+	u32 len;
+	int rc = 0;
+
+	udev = qedi->udev;
+	if (!udev) {
+		QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
+		return -EINVAL;
+	}
+
+	uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
+	if (!uctrl) {
+		QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
+		return -EINVAL;
+	}
+
+	len = uctrl->host_tx_pkt_len;
+	if (!len) {
+		QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
+		return -EINVAL;
+	}
+
+	skb = alloc_skb(len, GFP_ATOMIC);
+	if (!skb) {
+		QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
+		return -EINVAL;
+	}
+
+	skb_put(skb, len);
+	memcpy(skb->data, udev->tx_pkt, len);
+	skb->ip_summed = CHECKSUM_NONE;
+
+	if (vlanid)
+		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
+
+	rc = qedi_ops->ll2->start_xmit(cdev, skb);
+	if (rc) {
+		QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
+			 rc);
+		kfree_skb(skb);
+	}
+
+	uctrl->host_tx_pkt_len = 0;
+	uctrl->hw_tx_cons++;
+
+	return rc;
+}
+
+static void qedi_offload_work(struct work_struct *work)
+{
+	struct qedi_endpoint *qedi_ep =
+		container_of(work, struct qedi_endpoint, offload_work);
+	struct qedi_ctx *qedi;
+	int wait_delay = 20 * HZ;
+	int ret;
+
+	qedi = qedi_ep->qedi;
+
+	ret = qedi_iscsi_offload_conn(qedi_ep);
+	if (ret) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
+			 qedi_ep->iscsi_cid, qedi_ep, ret);
+		qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
+		return;
+	}
+
+	ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
+					       (qedi_ep->state ==
+					       EP_STATE_OFLDCONN_COMPL),
+					       wait_delay);
+	if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
+		qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
+			 qedi_ep->iscsi_cid, qedi_ep);
+	}
+}
+
+static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
+{
+	struct qedi_ctx *qedi;
+	struct qedi_endpoint *qedi_ep;
+	int ret = 0;
+	u32 iscsi_cid;
+	u16 port_id = 0;
+
+	if (!shost) {
+		ret = -ENXIO;
+		QEDI_ERR(NULL, "shost is NULL\n");
+		return ret;
+	}
+
+	if (strcmp(shost->hostt->proc_name, "qedi")) {
+		ret = -ENXIO;
+		QEDI_ERR(NULL, "shost %s is invalid\n",
+			 shost->hostt->proc_name);
+		return ret;
+	}
+
+	qedi = iscsi_host_priv(shost);
+	if (path_data->handle == QEDI_PATH_HANDLE) {
+		ret = qedi_data_avail(qedi, path_data->vlan_id);
+		goto set_path_exit;
+	}
+
+	iscsi_cid = (u32)path_data->handle;
+	qedi_ep = qedi->ep_tbl[iscsi_cid];
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
+
+	if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
+		QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
+		ret = -EIO;
+		goto set_path_exit;
+	}
+
+	ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
+	ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
+
+	qedi_ep->vlan_id = path_data->vlan_id;
+	if (path_data->pmtu < DEF_PATH_MTU) {
+		qedi_ep->pmtu = qedi->ll2_mtu;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "MTU cannot be %u, using default MTU %u\n",
+			   path_data->pmtu, qedi_ep->pmtu);
+	}
+
+	if (path_data->pmtu != qedi->ll2_mtu) {
+		if (path_data->pmtu > JUMBO_MTU) {
+			ret = -EINVAL;
+			QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
+			goto set_path_exit;
+		}
+
+		qedi_reset_host_mtu(qedi, path_data->pmtu);
+		qedi_ep->pmtu = qedi->ll2_mtu;
+	}
+
+	port_id = qedi_ep->src_port;
+	if (port_id >= QEDI_LOCAL_PORT_MIN &&
+	    port_id < QEDI_LOCAL_PORT_MAX) {
+		if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
+			port_id = 0;
+	} else {
+		port_id = 0;
+	}
+
+	if (!port_id) {
+		port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
+		if (port_id == QEDI_LOCAL_PORT_INVALID) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Failed to allocate port id for iscsi_cid=0x%x\n",
+				 iscsi_cid);
+			ret = -ENOMEM;
+			goto set_path_exit;
+		}
+	}
+
+	qedi_ep->src_port = port_id;
+
+	if (qedi_ep->ip_type == TCP_IPV4) {
+		memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
+		       sizeof(struct in_addr));
+		memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
+		       sizeof(struct in_addr));
+		qedi->ip_type = TCP_IPV4;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
+			  qedi_ep->src_addr, qedi_ep->src_port,
+			  qedi_ep->dst_addr, qedi_ep->dst_port);
+	} else {
+		memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
+		       sizeof(struct in6_addr));
+		memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
+		       sizeof(struct in6_addr));
+		qedi->ip_type = TCP_IPV6;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
+			  qedi_ep->src_addr, qedi_ep->src_port,
+			  qedi_ep->dst_addr, qedi_ep->dst_port);
+	}
+
+	INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
+	queue_work(qedi->offload_thread, &qedi_ep->offload_work);
+
+	ret = 0;
+
+set_path_exit:
+	return ret;
+}
+
+static umode_t qedi_attr_is_visible(int param_type, int param)
+{
+	switch (param_type) {
+	case ISCSI_HOST_PARAM:
+		switch (param) {
+		case ISCSI_HOST_PARAM_NETDEV_NAME:
+		case ISCSI_HOST_PARAM_HWADDRESS:
+		case ISCSI_HOST_PARAM_IPADDRESS:
+			return 0444;
+		default:
+			return 0;
+		}
+	case ISCSI_PARAM:
+		switch (param) {
+		case ISCSI_PARAM_MAX_RECV_DLENGTH:
+		case ISCSI_PARAM_MAX_XMIT_DLENGTH:
+		case ISCSI_PARAM_HDRDGST_EN:
+		case ISCSI_PARAM_DATADGST_EN:
+		case ISCSI_PARAM_CONN_ADDRESS:
+		case ISCSI_PARAM_CONN_PORT:
+		case ISCSI_PARAM_EXP_STATSN:
+		case ISCSI_PARAM_PERSISTENT_ADDRESS:
+		case ISCSI_PARAM_PERSISTENT_PORT:
+		case ISCSI_PARAM_PING_TMO:
+		case ISCSI_PARAM_RECV_TMO:
+		case ISCSI_PARAM_INITIAL_R2T_EN:
+		case ISCSI_PARAM_MAX_R2T:
+		case ISCSI_PARAM_IMM_DATA_EN:
+		case ISCSI_PARAM_FIRST_BURST:
+		case ISCSI_PARAM_MAX_BURST:
+		case ISCSI_PARAM_PDU_INORDER_EN:
+		case ISCSI_PARAM_DATASEQ_INORDER_EN:
+		case ISCSI_PARAM_ERL:
+		case ISCSI_PARAM_TARGET_NAME:
+		case ISCSI_PARAM_TPGT:
+		case ISCSI_PARAM_USERNAME:
+		case ISCSI_PARAM_PASSWORD:
+		case ISCSI_PARAM_USERNAME_IN:
+		case ISCSI_PARAM_PASSWORD_IN:
+		case ISCSI_PARAM_FAST_ABORT:
+		case ISCSI_PARAM_ABORT_TMO:
+		case ISCSI_PARAM_LU_RESET_TMO:
+		case ISCSI_PARAM_TGT_RESET_TMO:
+		case ISCSI_PARAM_IFACE_NAME:
+		case ISCSI_PARAM_INITIATOR_NAME:
+		case ISCSI_PARAM_BOOT_ROOT:
+		case ISCSI_PARAM_BOOT_NIC:
+		case ISCSI_PARAM_BOOT_TARGET:
+			return 0444;
+		default:
+			return 0;
+		}
+	}
+
+	return 0;
+}
+
+static void qedi_cleanup_task(struct iscsi_task *task)
+{
+	if (!task->sc || task->state == ISCSI_TASK_PENDING) {
+		QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
+			  atomic_read(&task->refcount));
+		return;
+	}
+
+	qedi_iscsi_unmap_sg_list(task->dd_data);
+}
+
+struct iscsi_transport qedi_iscsi_transport = {
+	.owner = THIS_MODULE,
+	.name = QEDI_MODULE_NAME,
+	.caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
+		CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
+	.create_session = qedi_session_create,
+	.destroy_session = qedi_session_destroy,
+	.create_conn = qedi_conn_create,
+	.bind_conn = qedi_conn_bind,
+	.start_conn = qedi_conn_start,
+	.stop_conn = iscsi_conn_stop,
+	.destroy_conn = qedi_conn_destroy,
+	.set_param = iscsi_set_param,
+	.get_ep_param = qedi_ep_get_param,
+	.get_conn_param = iscsi_conn_get_param,
+	.get_session_param = iscsi_session_get_param,
+	.get_host_param = qedi_host_get_param,
+	.send_pdu = iscsi_conn_send_pdu,
+	.get_stats = qedi_conn_get_stats,
+	.xmit_task = qedi_task_xmit,
+	.cleanup_task = qedi_cleanup_task,
+	.session_recovery_timedout = iscsi_session_recovery_timedout,
+	.ep_connect = qedi_ep_connect,
+	.ep_poll = qedi_ep_poll,
+	.ep_disconnect = qedi_ep_disconnect,
+	.set_path = qedi_set_path,
+	.attr_is_visible = qedi_attr_is_visible,
+};
+
+void qedi_start_conn_recovery(struct qedi_ctx *qedi,
+			      struct qedi_conn *qedi_conn)
+{
+	struct iscsi_cls_session *cls_sess;
+	struct iscsi_cls_conn *cls_conn;
+	struct iscsi_conn *conn;
+
+	cls_conn = qedi_conn->cls_conn;
+	conn = cls_conn->dd_data;
+	cls_sess = iscsi_conn_to_session(cls_conn);
+
+	if (iscsi_is_session_online(cls_sess)) {
+		qedi_conn->abrt_conn = 1;
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failing connection, state=0x%x, cid=0x%x\n",
+			 conn->session->state, qedi_conn->iscsi_conn_id);
+		iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
+				   ISCSI_ERR_CONN_FAILED);
+	}
+}
+
+static const struct {
+	enum iscsi_error_types error_code;
+	char *err_string;
+} qedi_iscsi_error[] = {
+	{ ISCSI_STATUS_NONE,
+	  "tcp_error none"
+	},
+	{ ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
+	  "task cid mismatch"
+	},
+	{ ISCSI_CONN_ERROR_TASK_NOT_VALID,
+	  "invalid task"
+	},
+	{ ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
+	  "rq ring full"
+	},
+	{ ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
+	  "cmdq ring full"
+	},
+	{ ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
+	  "sge caching failed"
+	},
+	{ ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
+	  "hdr digest error"
+	},
+	{ ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
+	  "local cmpl error"
+	},
+	{ ISCSI_CONN_ERROR_DATA_OVERRUN,
+	  "invalid task"
+	},
+	{ ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
+	  "out of sge error"
+	},
+	{ ISCSI_CONN_ERROR_TCP_SEG_PROC_IP_OPTIONS_ERROR,
+	  "tcp seg ip options error"
+	},
+	{ ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
+	  "tcp ip fragment error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
+	  "AHS len protocol error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
+	  "itt out of range error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
+	  "data seg more than pdu size"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
+	  "invalid opcode"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
+	  "invalid opcode before update"
+	},
+	{ ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
+	  "unexpected opcode"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
+	  "r2t carries no data"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
+	  "data sn error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
+	  "data TTT error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
+	  "r2t TTT error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
+	  "buffer offset error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
+	  "buffer offset ooo"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
+	  "data seg len 0"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
+	  "data xer len error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
+	  "data xer len1 error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
+	  "data xer len2 error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
+	  "protocol lun error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
+	  "f bit zero error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
+	  "exp stat sn error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
+	  "dsl not zero error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
+	  "invalid dsl"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
+	  "data seg len too big"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
+	  "outstanding r2t count error"
+	},
+	{ ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
+	  "sense datalen error"
+	},
+};
+
+char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
+{
+	int i;
+	char *msg = NULL;
+
+	for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
+		if (qedi_iscsi_error[i].error_code == err_code) {
+			msg = qedi_iscsi_error[i].err_string;
+			break;
+		}
+	}
+	return msg;
+}
+
+void qedi_process_iscsi_error(struct qedi_endpoint *ep, struct async_data *data)
+{
+	struct qedi_conn *qedi_conn;
+	struct qedi_ctx *qedi;
+	char warn_notice[] = "iscsi_warning";
+	char error_notice[] = "iscsi_error";
+	char unknown_msg[] = "Unknown error";
+	char *message;
+	int need_recovery = 0;
+	u32 err_mask = 0;
+	char *msg;
+
+	if (!ep)
+		return;
+
+	qedi_conn = ep->conn;
+	if (!qedi_conn)
+		return;
+
+	qedi = ep->qedi;
+
+	QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
+		 data->error_code);
+
+	if (err_mask) {
+		need_recovery = 0;
+		message = warn_notice;
+	} else {
+		need_recovery = 1;
+		message = error_notice;
+	}
+
+	msg = qedi_get_iscsi_error(data->error_code);
+	if (!msg) {
+		need_recovery = 0;
+		msg = unknown_msg;
+	}
+
+	iscsi_conn_printk(KERN_ALERT,
+			  qedi_conn->cls_conn->dd_data,
+			  "qedi: %s - %s\n", message, msg);
+
+	if (need_recovery)
+		qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
+}
+
+void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data)
+{
+	struct qedi_conn *qedi_conn;
+
+	if (!ep)
+		return;
+
+	qedi_conn = ep->conn;
+	if (!qedi_conn)
+		return;
+
+	QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
+		 data->error_code);
+
+	qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
+}

drivers/scsi/qedi/qedi_iscsi.h

+/*
+ * QLogic iSCSI 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 _QEDI_ISCSI_H_
+#define _QEDI_ISCSI_H_
+
+#include <linux/socket.h>
+#include <linux/completion.h>
+#include "qedi.h"
+
+#define ISCSI_MAX_SESS_PER_HBA	4096
+
+#define DEF_KA_TIMEOUT		7200000
+#define DEF_KA_INTERVAL		10000
+#define DEF_KA_MAX_PROBE_COUNT	10
+#define DEF_TOS			0
+#define DEF_TTL			0xfe
+#define DEF_SND_SEQ_SCALE	0
+#define DEF_RCV_BUF		0xffff
+#define DEF_SND_BUF		0xffff
+#define DEF_SEED		0
+#define DEF_MAX_RT_TIME		8000
+#define DEF_MAX_DA_COUNT        2
+#define DEF_SWS_TIMER		1000
+#define DEF_MAX_CWND		2
+#define DEF_PATH_MTU		1500
+#define DEF_MSS			1460
+#define DEF_LL2_MTU		1560
+#define JUMBO_MTU		9000
+
+#define MIN_MTU         576 /* rfc 793 */
+#define IPV4_HDR_LEN    20
+#define IPV6_HDR_LEN    40
+#define TCP_HDR_LEN     20
+#define TCP_OPTION_LEN  12
+#define VLAN_LEN         4
+
+enum {
+	EP_STATE_IDLE                   = 0x0,
+	EP_STATE_ACQRCONN_START         = 0x1,
+	EP_STATE_ACQRCONN_COMPL         = 0x2,
+	EP_STATE_OFLDCONN_START         = 0x4,
+	EP_STATE_OFLDCONN_COMPL         = 0x8,
+	EP_STATE_DISCONN_START          = 0x10,
+	EP_STATE_DISCONN_COMPL          = 0x20,
+	EP_STATE_CLEANUP_START          = 0x40,
+	EP_STATE_CLEANUP_CMPL           = 0x80,
+	EP_STATE_TCP_FIN_RCVD           = 0x100,
+	EP_STATE_TCP_RST_RCVD           = 0x200,
+	EP_STATE_LOGOUT_SENT            = 0x400,
+	EP_STATE_LOGOUT_RESP_RCVD       = 0x800,
+	EP_STATE_CLEANUP_FAILED         = 0x1000,
+	EP_STATE_OFLDCONN_FAILED        = 0x2000,
+	EP_STATE_CONNECT_FAILED         = 0x4000,
+	EP_STATE_DISCONN_TIMEDOUT       = 0x8000,
+};
+
+struct qedi_conn;
+
+struct qedi_endpoint {
+	struct qedi_ctx *qedi;
+	u32 dst_addr[4];
+	u32 src_addr[4];
+	u16 src_port;
+	u16 dst_port;
+	u16 vlan_id;
+	u16 pmtu;
+	u8 src_mac[ETH_ALEN];
+	u8 dst_mac[ETH_ALEN];
+	u8 ip_type;
+	int state;
+	wait_queue_head_t ofld_wait;
+	wait_queue_head_t tcp_ofld_wait;
+	u32 iscsi_cid;
+	/* identifier of the connection from qed */
+	u32 handle;
+	u32 fw_cid;
+	void __iomem *p_doorbell;
+
+	/* Send queue management */
+	struct iscsi_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;
+	struct qedi_conn *conn;
+	struct work_struct offload_work;
+};
+
+#define QEDI_SQ_WQES_MIN	16
+
+struct qedi_io_bdt {
+	struct iscsi_sge *sge_tbl;
+	dma_addr_t sge_tbl_dma;
+	u16 sge_valid;
+};
+
+/**
+ * struct generic_pdu_resc - login pdu resource structure
+ *
+ * @req_buf:            driver buffer used to stage payload associated with
+ *                      the login request
+ * @req_dma_addr:       dma address for iscsi login request payload buffer
+ * @req_buf_size:       actual login request payload length
+ * @req_wr_ptr:         pointer into login request buffer when next data is
+ *                      to be written
+ * @resp_hdr:           iscsi header where iscsi login response header is to
+ *                      be recreated
+ * @resp_buf:           buffer to stage login response payload
+ * @resp_dma_addr:      login response payload buffer dma address
+ * @resp_buf_size:      login response paylod length
+ * @resp_wr_ptr:        pointer into login response buffer when next data is
+ *                      to be written
+ * @req_bd_tbl:         iscsi login request payload BD table
+ * @req_bd_dma:         login request BD table dma address
+ * @resp_bd_tbl:        iscsi login response payload BD table
+ * @resp_bd_dma:        login request BD table dma address
+ *
+ * following structure defines buffer info for generic pdus such as iSCSI Login,
+ *      Logout and NOP
+ */
+struct generic_pdu_resc {
+	char *req_buf;
+	dma_addr_t req_dma_addr;
+	u32 req_buf_size;
+	char *req_wr_ptr;
+	struct iscsi_hdr resp_hdr;
+	char *resp_buf;
+	dma_addr_t resp_dma_addr;
+	u32 resp_buf_size;
+	char *resp_wr_ptr;
+	char *req_bd_tbl;
+	dma_addr_t req_bd_dma;
+	char *resp_bd_tbl;
+	dma_addr_t resp_bd_dma;
+};
+
+struct qedi_conn {
+	struct iscsi_cls_conn *cls_conn;
+	struct qedi_ctx *qedi;
+	struct qedi_endpoint *ep;
+	struct list_head active_cmd_list;
+	spinlock_t list_lock;		/* internal conn lock */
+	u32 active_cmd_count;
+	u32 cmd_cleanup_req;
+	u32 cmd_cleanup_cmpl;
+
+	u32 iscsi_conn_id;
+	int itt;
+	int abrt_conn;
+#define QEDI_CID_RESERVED	0x5AFF
+	u32 fw_cid;
+	/*
+	 * Buffer for login negotiation process
+	 */
+	struct generic_pdu_resc gen_pdu;
+
+	struct list_head tmf_work_list;
+	wait_queue_head_t wait_queue;
+	spinlock_t tmf_work_lock;	/* tmf work lock */
+	unsigned long flags;
+#define QEDI_CONN_FW_CLEANUP	1
+};
+
+struct qedi_cmd {
+	struct list_head io_cmd;
+	bool io_cmd_in_list;
+	struct iscsi_hdr hdr;
+	struct qedi_conn *conn;
+	struct scsi_cmnd *scsi_cmd;
+	struct scatterlist *sg;
+	struct qedi_io_bdt io_tbl;
+	struct iscsi_task_context request;
+	unsigned char *sense_buffer;
+	dma_addr_t sense_buffer_dma;
+	u16 task_id;
+
+	/* field populated for tmf work queue */
+	struct iscsi_task *task;
+	struct work_struct tmf_work;
+	int state;
+#define CLEANUP_WAIT	1
+#define CLEANUP_RECV	2
+#define CLEANUP_WAIT_FAILED	3
+#define CLEANUP_NOT_REQUIRED	4
+#define LUN_RESET_RESPONSE_RECEIVED	5
+#define RESPONSE_RECEIVED	6
+
+	int type;
+#define TYPEIO		1
+#define TYPERESET	2
+
+	struct qedi_work_map *list_tmf_work;
+	/* slowpath management */
+	bool use_slowpath;
+
+	struct iscsi_tm_rsp *tmf_resp_buf;
+	struct qedi_work cqe_work;
+};
+
+struct qedi_work_map {
+	struct list_head list;
+	struct qedi_cmd *qedi_cmd;
+	int rtid;
+
+	int state;
+#define QEDI_WORK_QUEUED	1
+#define QEDI_WORK_SCHEDULED	2
+#define QEDI_WORK_EXIT		3
+
+	struct work_struct *ptr_tmf_work;
+};
+
+#define qedi_set_itt(task_id, itt) ((u32)(((task_id) & 0xffff) | ((itt) << 16)))
+#define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16)
+
+#define QEDI_OFLD_WAIT_STATE(q) ((q)->state == EP_STATE_OFLDCONN_FAILED || \
+				(q)->state == EP_STATE_OFLDCONN_COMPL)
+
+#endif /* _QEDI_ISCSI_H_ */

drivers/scsi/qedi/qedi_main.c

+/*
+ * QLogic iSCSI 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/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/if_arp.h>
+#include <scsi/iscsi_if.h>
+#include <linux/inet.h>
+#include <net/arp.h>
+#include <linux/list.h>
+#include <linux/kthread.h>
+#include <linux/mm.h>
+#include <linux/if_vlan.h>
+#include <linux/cpu.h>
+
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi.h>
+
+#include "qedi.h"
+#include "qedi_gbl.h"
+#include "qedi_iscsi.h"
+
+static uint qedi_fw_debug;
+module_param(qedi_fw_debug, uint, 0644);
+MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
+
+uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
+module_param(qedi_dbg_log, uint, 0644);
+MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
+
+uint qedi_io_tracing;
+module_param(qedi_io_tracing, uint, 0644);
+MODULE_PARM_DESC(qedi_io_tracing,
+		 " Enable logging of SCSI requests/completions into trace buffer. (default off).");
+
+const struct qed_iscsi_ops *qedi_ops;
+static struct scsi_transport_template *qedi_scsi_transport;
+static struct pci_driver qedi_pci_driver;
+static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
+static LIST_HEAD(qedi_udev_list);
+/* Static function declaration */
+static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
+static void qedi_free_global_queues(struct qedi_ctx *qedi);
+static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
+static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
+static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
+
+static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
+{
+	struct qedi_ctx *qedi;
+	struct qedi_endpoint *qedi_ep;
+	struct async_data *data;
+	int rval = 0;
+
+	if (!context || !fw_handle) {
+		QEDI_ERR(NULL, "Recv event with ctx NULL\n");
+		return -EINVAL;
+	}
+
+	qedi = (struct qedi_ctx *)context;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
+
+	data = (struct async_data *)fw_handle;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "cid=0x%x tid=0x%x err-code=0x%x fw-dbg-param=0x%x\n",
+		   data->cid, data->itid, data->error_code,
+		   data->fw_debug_param);
+
+	qedi_ep = qedi->ep_tbl[data->cid];
+
+	if (!qedi_ep) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Cannot process event, ep already disconnected, cid=0x%x\n",
+			   data->cid);
+		WARN_ON(1);
+		return -ENODEV;
+	}
+
+	switch (fw_event_code) {
+	case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
+		if (qedi_ep->state == EP_STATE_OFLDCONN_START)
+			qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
+
+		wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
+		break;
+	case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
+		qedi_ep->state = EP_STATE_DISCONN_COMPL;
+		wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
+		break;
+	case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
+		qedi_process_iscsi_error(qedi_ep, data);
+		break;
+	case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
+	case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
+	case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
+	case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
+	case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
+	case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
+	case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
+		qedi_process_tcp_error(qedi_ep, data);
+		break;
+	default:
+		QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
+			 fw_event_code);
+	}
+
+	return rval;
+}
+
+static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
+{
+	struct qedi_uio_dev *udev = uinfo->priv;
+	struct qedi_ctx *qedi = udev->qedi;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (udev->uio_dev != -1)
+		return -EBUSY;
+
+	rtnl_lock();
+	udev->uio_dev = iminor(inode);
+	qedi_reset_uio_rings(udev);
+	set_bit(UIO_DEV_OPENED, &qedi->flags);
+	rtnl_unlock();
+
+	return 0;
+}
+
+static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
+{
+	struct qedi_uio_dev *udev = uinfo->priv;
+	struct qedi_ctx *qedi = udev->qedi;
+
+	udev->uio_dev = -1;
+	clear_bit(UIO_DEV_OPENED, &qedi->flags);
+	qedi_ll2_free_skbs(qedi);
+	return 0;
+}
+
+static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
+{
+	if (udev->ll2_ring) {
+		free_page((unsigned long)udev->ll2_ring);
+		udev->ll2_ring = NULL;
+	}
+
+	if (udev->ll2_buf) {
+		free_pages((unsigned long)udev->ll2_buf, 2);
+		udev->ll2_buf = NULL;
+	}
+}
+
+static void __qedi_free_uio(struct qedi_uio_dev *udev)
+{
+	uio_unregister_device(&udev->qedi_uinfo);
+
+	__qedi_free_uio_rings(udev);
+
+	pci_dev_put(udev->pdev);
+	kfree(udev->uctrl);
+	kfree(udev);
+}
+
+static void qedi_free_uio(struct qedi_uio_dev *udev)
+{
+	if (!udev)
+		return;
+
+	list_del_init(&udev->list);
+	__qedi_free_uio(udev);
+}
+
+static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
+{
+	struct qedi_ctx *qedi = NULL;
+	struct qedi_uio_ctrl *uctrl = NULL;
+
+	qedi = udev->qedi;
+	uctrl = udev->uctrl;
+
+	spin_lock_bh(&qedi->ll2_lock);
+	uctrl->host_rx_cons = 0;
+	uctrl->hw_rx_prod = 0;
+	uctrl->hw_rx_bd_prod = 0;
+	uctrl->host_rx_bd_cons = 0;
+
+	memset(udev->ll2_ring, 0, udev->ll2_ring_size);
+	memset(udev->ll2_buf, 0, udev->ll2_buf_size);
+	spin_unlock_bh(&qedi->ll2_lock);
+}
+
+static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
+{
+	int rc = 0;
+
+	if (udev->ll2_ring || udev->ll2_buf)
+		return rc;
+
+	/* Allocating memory for LL2 ring  */
+	udev->ll2_ring_size = QEDI_PAGE_SIZE;
+	udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
+	if (!udev->ll2_ring) {
+		rc = -ENOMEM;
+		goto exit_alloc_ring;
+	}
+
+	/* Allocating memory for Tx/Rx pkt buffer */
+	udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
+	udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
+	udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
+						 __GFP_ZERO, 2);
+	if (!udev->ll2_buf) {
+		rc = -ENOMEM;
+		goto exit_alloc_buf;
+	}
+	return rc;
+
+exit_alloc_buf:
+	free_page((unsigned long)udev->ll2_ring);
+	udev->ll2_ring = NULL;
+exit_alloc_ring:
+	return rc;
+}
+
+static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
+{
+	struct qedi_uio_dev *udev = NULL;
+	struct qedi_uio_ctrl *uctrl = NULL;
+	int rc = 0;
+
+	list_for_each_entry(udev, &qedi_udev_list, list) {
+		if (udev->pdev == qedi->pdev) {
+			udev->qedi = qedi;
+			if (__qedi_alloc_uio_rings(udev)) {
+				udev->qedi = NULL;
+				return -ENOMEM;
+			}
+			qedi->udev = udev;
+			return 0;
+		}
+	}
+
+	udev = kzalloc(sizeof(*udev), GFP_KERNEL);
+	if (!udev) {
+		rc = -ENOMEM;
+		goto err_udev;
+	}
+
+	uctrl = kzalloc(sizeof(*uctrl), GFP_KERNEL);
+	if (!uctrl) {
+		rc = -ENOMEM;
+		goto err_uctrl;
+	}
+
+	udev->uio_dev = -1;
+
+	udev->qedi = qedi;
+	udev->pdev = qedi->pdev;
+	udev->uctrl = uctrl;
+
+	rc = __qedi_alloc_uio_rings(udev);
+	if (rc)
+		goto err_uio_rings;
+
+	list_add(&udev->list, &qedi_udev_list);
+
+	pci_dev_get(udev->pdev);
+	qedi->udev = udev;
+
+	udev->tx_pkt = udev->ll2_buf;
+	udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
+	return 0;
+
+ err_uio_rings:
+	kfree(uctrl);
+ err_uctrl:
+	kfree(udev);
+ err_udev:
+	return -ENOMEM;
+}
+
+static int qedi_init_uio(struct qedi_ctx *qedi)
+{
+	struct qedi_uio_dev *udev = qedi->udev;
+	struct uio_info *uinfo;
+	int ret = 0;
+
+	if (!udev)
+		return -ENOMEM;
+
+	uinfo = &udev->qedi_uinfo;
+
+	uinfo->mem[0].addr = (unsigned long)udev->uctrl;
+	uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
+	uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
+
+	uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
+	uinfo->mem[1].size = udev->ll2_ring_size;
+	uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
+
+	uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
+	uinfo->mem[2].size = udev->ll2_buf_size;
+	uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
+
+	uinfo->name = "qedi_uio";
+	uinfo->version = QEDI_MODULE_VERSION;
+	uinfo->irq = UIO_IRQ_CUSTOM;
+
+	uinfo->open = qedi_uio_open;
+	uinfo->release = qedi_uio_close;
+
+	if (udev->uio_dev == -1) {
+		if (!uinfo->priv) {
+			uinfo->priv = udev;
+
+			ret = uio_register_device(&udev->pdev->dev, uinfo);
+			if (ret) {
+				QEDI_ERR(&qedi->dbg_ctx,
+					 "UIO registration failed\n");
+			}
+		}
+	}
+
+	return ret;
+}
+
+static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
+				  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(&qedi->pdev->dev,
+				     sizeof(struct status_block), &sb_phys,
+				     GFP_KERNEL);
+	if (!sb_virt) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Status block allocation failed for id = %d.\n",
+			  sb_id);
+		return -ENOMEM;
+	}
+
+	ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
+				       sb_id, QED_SB_TYPE_STORAGE);
+	if (ret) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Status block initialization failed for id = %d.\n",
+			  sb_id);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void qedi_free_sb(struct qedi_ctx *qedi)
+{
+	struct qed_sb_info *sb_info;
+	int id;
+
+	for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
+		sb_info = &qedi->sb_array[id];
+		if (sb_info->sb_virt)
+			dma_free_coherent(&qedi->pdev->dev,
+					  sizeof(*sb_info->sb_virt),
+					  (void *)sb_info->sb_virt,
+					  sb_info->sb_phys);
+	}
+}
+
+static void qedi_free_fp(struct qedi_ctx *qedi)
+{
+	kfree(qedi->fp_array);
+	kfree(qedi->sb_array);
+}
+
+static void qedi_destroy_fp(struct qedi_ctx *qedi)
+{
+	qedi_free_sb(qedi);
+	qedi_free_fp(qedi);
+}
+
+static int qedi_alloc_fp(struct qedi_ctx *qedi)
+{
+	int ret = 0;
+
+	qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
+				 sizeof(struct qedi_fastpath), GFP_KERNEL);
+	if (!qedi->fp_array) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "fastpath fp array allocation failed.\n");
+		return -ENOMEM;
+	}
+
+	qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
+				 sizeof(struct qed_sb_info), GFP_KERNEL);
+	if (!qedi->sb_array) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "fastpath sb array allocation failed.\n");
+		ret = -ENOMEM;
+		goto free_fp;
+	}
+
+	return ret;
+
+free_fp:
+	qedi_free_fp(qedi);
+	return ret;
+}
+
+static void qedi_int_fp(struct qedi_ctx *qedi)
+{
+	struct qedi_fastpath *fp;
+	int id;
+
+	memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
+	       sizeof(*qedi->fp_array));
+	memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
+	       sizeof(*qedi->sb_array));
+
+	for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
+		fp = &qedi->fp_array[id];
+		fp->sb_info = &qedi->sb_array[id];
+		fp->sb_id = id;
+		fp->qedi = qedi;
+		snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
+			 "qedi", id);
+
+		/* fp_array[i] ---- irq cookie
+		 * So init data which is needed in int ctx
+		 */
+	}
+}
+
+static int qedi_prepare_fp(struct qedi_ctx *qedi)
+{
+	struct qedi_fastpath *fp;
+	int id, ret = 0;
+
+	ret = qedi_alloc_fp(qedi);
+	if (ret)
+		goto err;
+
+	qedi_int_fp(qedi);
+
+	for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
+		fp = &qedi->fp_array[id];
+		ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
+		if (ret) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "SB allocation and initialization failed.\n");
+			ret = -EIO;
+			goto err_init;
+		}
+	}
+
+	return 0;
+
+err_init:
+	qedi_free_sb(qedi);
+	qedi_free_fp(qedi);
+err:
+	return ret;
+}
+
+static int qedi_setup_cid_que(struct qedi_ctx *qedi)
+{
+	int i;
+
+	qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
+						   sizeof(u32), GFP_KERNEL);
+	if (!qedi->cid_que.cid_que_base)
+		return -ENOMEM;
+
+	qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
+						   sizeof(struct qedi_conn *),
+						   GFP_KERNEL);
+	if (!qedi->cid_que.conn_cid_tbl) {
+		kfree(qedi->cid_que.cid_que_base);
+		qedi->cid_que.cid_que_base = NULL;
+		return -ENOMEM;
+	}
+
+	qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
+	qedi->cid_que.cid_q_prod_idx = 0;
+	qedi->cid_que.cid_q_cons_idx = 0;
+	qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
+	qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
+
+	for (i = 0; i < qedi->max_active_conns; i++) {
+		qedi->cid_que.cid_que[i] = i;
+		qedi->cid_que.conn_cid_tbl[i] = NULL;
+	}
+
+	return 0;
+}
+
+static void qedi_release_cid_que(struct qedi_ctx *qedi)
+{
+	kfree(qedi->cid_que.cid_que_base);
+	qedi->cid_que.cid_que_base = NULL;
+
+	kfree(qedi->cid_que.conn_cid_tbl);
+	qedi->cid_que.conn_cid_tbl = NULL;
+}
+
+static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
+			    u16 start_id, u16 next)
+{
+	id_tbl->start = start_id;
+	id_tbl->max = size;
+	id_tbl->next = next;
+	spin_lock_init(&id_tbl->lock);
+	id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
+	if (!id_tbl->table)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
+{
+	kfree(id_tbl->table);
+	id_tbl->table = NULL;
+}
+
+int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
+{
+	int ret = -1;
+
+	id -= id_tbl->start;
+	if (id >= id_tbl->max)
+		return ret;
+
+	spin_lock(&id_tbl->lock);
+	if (!test_bit(id, id_tbl->table)) {
+		set_bit(id, id_tbl->table);
+		ret = 0;
+	}
+	spin_unlock(&id_tbl->lock);
+	return ret;
+}
+
+u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
+{
+	u16 id;
+
+	spin_lock(&id_tbl->lock);
+	id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
+	if (id >= id_tbl->max) {
+		id = QEDI_LOCAL_PORT_INVALID;
+		if (id_tbl->next != 0) {
+			id = find_first_zero_bit(id_tbl->table, id_tbl->next);
+			if (id >= id_tbl->next)
+				id = QEDI_LOCAL_PORT_INVALID;
+		}
+	}
+
+	if (id < id_tbl->max) {
+		set_bit(id, id_tbl->table);
+		id_tbl->next = (id + 1) & (id_tbl->max - 1);
+		id += id_tbl->start;
+	}
+
+	spin_unlock(&id_tbl->lock);
+
+	return id;
+}
+
+void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
+{
+	if (id == QEDI_LOCAL_PORT_INVALID)
+		return;
+
+	id -= id_tbl->start;
+	if (id >= id_tbl->max)
+		return;
+
+	clear_bit(id, id_tbl->table);
+}
+
+static void qedi_cm_free_mem(struct qedi_ctx *qedi)
+{
+	kfree(qedi->ep_tbl);
+	qedi->ep_tbl = NULL;
+	qedi_free_id_tbl(&qedi->lcl_port_tbl);
+}
+
+static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
+{
+	u16 port_id;
+
+	qedi->ep_tbl = kzalloc((qedi->max_active_conns *
+				sizeof(struct qedi_endpoint *)), GFP_KERNEL);
+	if (!qedi->ep_tbl)
+		return -ENOMEM;
+	port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
+	if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
+			     QEDI_LOCAL_PORT_MIN, port_id)) {
+		qedi_cm_free_mem(qedi);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
+{
+	struct Scsi_Host *shost;
+	struct qedi_ctx *qedi = NULL;
+
+	shost = iscsi_host_alloc(&qedi_host_template,
+				 sizeof(struct qedi_ctx), 0);
+	if (!shost) {
+		QEDI_ERR(NULL, "Could not allocate shost\n");
+		goto exit_setup_shost;
+	}
+
+	shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
+	shost->max_channel = 0;
+	shost->max_lun = ~0;
+	shost->max_cmd_len = 16;
+	shost->transportt = qedi_scsi_transport;
+
+	qedi = iscsi_host_priv(shost);
+	memset(qedi, 0, sizeof(*qedi));
+	qedi->shost = shost;
+	qedi->dbg_ctx.host_no = shost->host_no;
+	qedi->pdev = pdev;
+	qedi->dbg_ctx.pdev = pdev;
+	qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
+	qedi->max_sqes = QEDI_SQ_SIZE;
+
+	if (shost_use_blk_mq(shost))
+		shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
+
+	pci_set_drvdata(pdev, qedi);
+
+exit_setup_shost:
+	return qedi;
+}
+
+static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
+{
+	struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
+	struct qedi_uio_dev *udev;
+	struct qedi_uio_ctrl *uctrl;
+	struct skb_work_list *work;
+	u32 prod;
+
+	if (!qedi) {
+		QEDI_ERR(NULL, "qedi is NULL\n");
+		return -1;
+	}
+
+	if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
+			  "UIO DEV is not opened\n");
+		kfree_skb(skb);
+		return 0;
+	}
+
+	udev = qedi->udev;
+	uctrl = udev->uctrl;
+
+	work = kzalloc(sizeof(*work), GFP_ATOMIC);
+	if (!work) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Could not allocate work so dropping frame.\n");
+		kfree_skb(skb);
+		return 0;
+	}
+
+	INIT_LIST_HEAD(&work->list);
+	work->skb = skb;
+
+	if (skb_vlan_tag_present(skb))
+		work->vlan_id = skb_vlan_tag_get(skb);
+
+	if (work->vlan_id)
+		__vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
+
+	spin_lock_bh(&qedi->ll2_lock);
+	list_add_tail(&work->list, &qedi->ll2_skb_list);
+
+	++uctrl->hw_rx_prod_cnt;
+	prod = (uctrl->hw_rx_prod + 1) % RX_RING;
+	if (prod != uctrl->host_rx_cons) {
+		uctrl->hw_rx_prod = prod;
+		spin_unlock_bh(&qedi->ll2_lock);
+		wake_up_process(qedi->ll2_recv_thread);
+		return 0;
+	}
+
+	spin_unlock_bh(&qedi->ll2_lock);
+	return 0;
+}
+
+/* map this skb to iscsiuio mmaped region */
+static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
+				u16 vlan_id)
+{
+	struct qedi_uio_dev *udev = NULL;
+	struct qedi_uio_ctrl *uctrl = NULL;
+	struct qedi_rx_bd rxbd;
+	struct qedi_rx_bd *p_rxbd;
+	u32 rx_bd_prod;
+	void *pkt;
+	int len = 0;
+
+	if (!qedi) {
+		QEDI_ERR(NULL, "qedi is NULL\n");
+		return -1;
+	}
+
+	udev = qedi->udev;
+	uctrl = udev->uctrl;
+	pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
+	len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
+	memcpy(pkt, skb->data, len);
+
+	memset(&rxbd, 0, sizeof(rxbd));
+	rxbd.rx_pkt_index = uctrl->hw_rx_prod;
+	rxbd.rx_pkt_len = len;
+	rxbd.vlan_id = vlan_id;
+
+	uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
+	rx_bd_prod = uctrl->hw_rx_bd_prod;
+	p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
+	p_rxbd += rx_bd_prod;
+
+	memcpy(p_rxbd, &rxbd, sizeof(rxbd));
+
+	/* notify the iscsiuio about new packet */
+	uio_event_notify(&udev->qedi_uinfo);
+
+	return 0;
+}
+
+static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
+{
+	struct skb_work_list *work, *work_tmp;
+
+	spin_lock_bh(&qedi->ll2_lock);
+	list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
+		list_del(&work->list);
+		if (work->skb)
+			kfree_skb(work->skb);
+		kfree(work);
+	}
+	spin_unlock_bh(&qedi->ll2_lock);
+}
+
+static int qedi_ll2_recv_thread(void *arg)
+{
+	struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
+	struct skb_work_list *work, *work_tmp;
+
+	set_user_nice(current, -20);
+
+	while (!kthread_should_stop()) {
+		spin_lock_bh(&qedi->ll2_lock);
+		list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
+					 list) {
+			list_del(&work->list);
+			qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
+			kfree_skb(work->skb);
+			kfree(work);
+		}
+		set_current_state(TASK_INTERRUPTIBLE);
+		spin_unlock_bh(&qedi->ll2_lock);
+		schedule();
+	}
+
+	__set_current_state(TASK_RUNNING);
+	return 0;
+}
+
+static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
+{
+	u8 num_sq_pages;
+	u32 log_page_size;
+	int rval = 0;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "Min number of MSIX %d\n",
+		  MIN_NUM_CPUS_MSIX(qedi));
+
+	num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
+
+	qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
+
+	memset(&qedi->pf_params.iscsi_pf_params, 0,
+	       sizeof(qedi->pf_params.iscsi_pf_params));
+
+	qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
+			qedi->num_queues * sizeof(struct qedi_glbl_q_params),
+			&qedi->hw_p_cpuq);
+	if (!qedi->p_cpuq) {
+		QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
+		rval = -1;
+		goto err_alloc_mem;
+	}
+
+	rval = qedi_alloc_global_queues(qedi);
+	if (rval) {
+		QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
+		rval = -1;
+		goto err_alloc_mem;
+	}
+
+	qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
+	qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
+	qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
+	qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
+	qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
+	qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
+	qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
+	qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
+
+	for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
+		if ((1 << log_page_size) == PAGE_SIZE)
+			break;
+	}
+	qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
+
+	qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
+							   (u64)qedi->hw_p_cpuq;
+
+	/* RQ BDQ initializations.
+	 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
+	 * rqe_log_size: 8 for 256B RQE
+	 */
+	qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
+	/* BDQ address and size */
+	qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
+							qedi->bdq_pbl_list_dma;
+	qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
+						qedi->bdq_pbl_list_num_entries;
+	qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
+
+	/* cq_num_entries: num_tasks + rq_num_entries */
+	qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
+
+	qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
+	qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
+	qedi->pf_params.iscsi_pf_params.ooo_enable = 1;
+
+err_alloc_mem:
+	return rval;
+}
+
+/* Free DMA coherent memory for array of queue pointers we pass to qed */
+static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
+{
+	size_t size = 0;
+
+	if (qedi->p_cpuq) {
+		size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
+		pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
+				    qedi->hw_p_cpuq);
+	}
+
+	qedi_free_global_queues(qedi);
+
+	kfree(qedi->global_queues);
+}
+
+static void qedi_link_update(void *dev, struct qed_link_output *link)
+{
+	struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
+
+	if (link->link_up) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
+		atomic_set(&qedi->link_state, QEDI_LINK_UP);
+	} else {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Link Down event.\n");
+		atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
+	}
+}
+
+static struct qed_iscsi_cb_ops qedi_cb_ops = {
+	{
+		.link_update =		qedi_link_update,
+	}
+};
+
+static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
+			  u16 que_idx, struct qedi_percpu_s *p)
+{
+	struct qedi_work *qedi_work;
+	struct qedi_conn *q_conn;
+	struct iscsi_conn *conn;
+	struct qedi_cmd *qedi_cmd;
+	u32 iscsi_cid;
+	int rc = 0;
+
+	iscsi_cid  = cqe->cqe_common.conn_id;
+	q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
+	if (!q_conn) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Session no longer exists for cid=0x%x!!\n",
+			  iscsi_cid);
+		return -1;
+	}
+	conn = q_conn->cls_conn->dd_data;
+
+	switch (cqe->cqe_common.cqe_type) {
+	case ISCSI_CQE_TYPE_SOLICITED:
+	case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
+		qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
+		if (!qedi_cmd) {
+			rc = -1;
+			break;
+		}
+		INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
+		qedi_cmd->cqe_work.qedi = qedi;
+		memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
+		qedi_cmd->cqe_work.que_idx = que_idx;
+		qedi_cmd->cqe_work.is_solicited = true;
+		list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
+		break;
+	case ISCSI_CQE_TYPE_UNSOLICITED:
+	case ISCSI_CQE_TYPE_DUMMY:
+	case ISCSI_CQE_TYPE_TASK_CLEANUP:
+		qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
+		if (!qedi_work) {
+			rc = -1;
+			break;
+		}
+		INIT_LIST_HEAD(&qedi_work->list);
+		qedi_work->qedi = qedi;
+		memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
+		qedi_work->que_idx = que_idx;
+		qedi_work->is_solicited = false;
+		list_add_tail(&qedi_work->list, &p->work_list);
+		break;
+	default:
+		rc = -1;
+		QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
+	}
+	return rc;
+}
+
+static bool qedi_process_completions(struct qedi_fastpath *fp)
+{
+	struct qedi_ctx *qedi = fp->qedi;
+	struct qed_sb_info *sb_info = fp->sb_info;
+	struct status_block *sb = sb_info->sb_virt;
+	struct qedi_percpu_s *p = NULL;
+	struct global_queue *que;
+	u16 prod_idx;
+	unsigned long flags;
+	union iscsi_cqe *cqe;
+	int cpu;
+	int ret;
+
+	/* Get the current firmware producer index */
+	prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
+
+	if (prod_idx >= QEDI_CQ_SIZE)
+		prod_idx = prod_idx % QEDI_CQ_SIZE;
+
+	que = qedi->global_queues[fp->sb_id];
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
+		  "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
+		  que, prod_idx, que->cq_cons_idx, fp->sb_id);
+
+	qedi->intr_cpu = fp->sb_id;
+	cpu = smp_processor_id();
+	p = &per_cpu(qedi_percpu, cpu);
+
+	if (unlikely(!p->iothread))
+		WARN_ON(1);
+
+	spin_lock_irqsave(&p->p_work_lock, flags);
+	while (que->cq_cons_idx != prod_idx) {
+		cqe = &que->cq[que->cq_cons_idx];
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
+			  "cqe=%p prod_idx=%d cons_idx=%d.\n",
+			  cqe, prod_idx, que->cq_cons_idx);
+
+		ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
+		if (ret)
+			continue;
+
+		que->cq_cons_idx++;
+		if (que->cq_cons_idx == QEDI_CQ_SIZE)
+			que->cq_cons_idx = 0;
+	}
+	wake_up_process(p->iothread);
+	spin_unlock_irqrestore(&p->p_work_lock, flags);
+
+	return true;
+}
+
+static bool qedi_fp_has_work(struct qedi_fastpath *fp)
+{
+	struct qedi_ctx *qedi = fp->qedi;
+	struct global_queue *que;
+	struct qed_sb_info *sb_info = fp->sb_info;
+	struct status_block *sb = sb_info->sb_virt;
+	u16 prod_idx;
+
+	barrier();
+
+	/* Get the current firmware producer index */
+	prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
+
+	/* Get the pointer to the global CQ this completion is on */
+	que = qedi->global_queues[fp->sb_id];
+
+	/* prod idx wrap around uint16 */
+	if (prod_idx >= QEDI_CQ_SIZE)
+		prod_idx = prod_idx % QEDI_CQ_SIZE;
+
+	return (que->cq_cons_idx != prod_idx);
+}
+
+/* MSI-X fastpath handler code */
+static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
+{
+	struct qedi_fastpath *fp = dev_id;
+	struct qedi_ctx *qedi = fp->qedi;
+	bool wake_io_thread = true;
+
+	qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
+
+process_again:
+	wake_io_thread = qedi_process_completions(fp);
+	if (wake_io_thread) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+			  "process already running\n");
+	}
+
+	if (qedi_fp_has_work(fp) == 0)
+		qed_sb_update_sb_idx(fp->sb_info);
+
+	/* Check for more work */
+	rmb();
+
+	if (qedi_fp_has_work(fp) == 0)
+		qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
+	else
+		goto process_again;
+
+	return IRQ_HANDLED;
+}
+
+/* simd handler for MSI/INTa */
+static void qedi_simd_int_handler(void *cookie)
+{
+	/* Cookie is qedi_ctx struct */
+	struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
+
+	QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
+}
+
+#define QEDI_SIMD_HANDLER_NUM		0
+static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
+{
+	int i;
+
+	if (qedi->int_info.msix_cnt) {
+		for (i = 0; i < qedi->int_info.used_cnt; i++) {
+			synchronize_irq(qedi->int_info.msix[i].vector);
+			irq_set_affinity_hint(qedi->int_info.msix[i].vector,
+					      NULL);
+			free_irq(qedi->int_info.msix[i].vector,
+				 &qedi->fp_array[i]);
+		}
+	} else {
+		qedi_ops->common->simd_handler_clean(qedi->cdev,
+						     QEDI_SIMD_HANDLER_NUM);
+	}
+
+	qedi->int_info.used_cnt = 0;
+	qedi_ops->common->set_fp_int(qedi->cdev, 0);
+}
+
+static int qedi_request_msix_irq(struct qedi_ctx *qedi)
+{
+	int i, rc, cpu;
+
+	cpu = cpumask_first(cpu_online_mask);
+	for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
+		rc = request_irq(qedi->int_info.msix[i].vector,
+				 qedi_msix_handler, 0, "qedi",
+				 &qedi->fp_array[i]);
+
+		if (rc) {
+			QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
+			qedi_sync_free_irqs(qedi);
+			return rc;
+		}
+		qedi->int_info.used_cnt++;
+		rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
+					   get_cpu_mask(cpu));
+		cpu = cpumask_next(cpu, cpu_online_mask);
+	}
+
+	return 0;
+}
+
+static int qedi_setup_int(struct qedi_ctx *qedi)
+{
+	int rc = 0;
+
+	rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
+	rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
+	if (rc)
+		goto exit_setup_int;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
+		   qedi->int_info.msix_cnt, num_online_cpus());
+
+	if (qedi->int_info.msix_cnt) {
+		rc = qedi_request_msix_irq(qedi);
+		goto exit_setup_int;
+	} else {
+		qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
+						      QEDI_SIMD_HANDLER_NUM,
+						      qedi_simd_int_handler);
+		qedi->int_info.used_cnt = 1;
+	}
+
+exit_setup_int:
+	return rc;
+}
+
+static void qedi_free_bdq(struct qedi_ctx *qedi)
+{
+	int i;
+
+	if (qedi->bdq_pbl_list)
+		dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
+				  qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
+
+	if (qedi->bdq_pbl)
+		dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
+				  qedi->bdq_pbl, qedi->bdq_pbl_dma);
+
+	for (i = 0; i < QEDI_BDQ_NUM; i++) {
+		if (qedi->bdq[i].buf_addr) {
+			dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
+					  qedi->bdq[i].buf_addr,
+					  qedi->bdq[i].buf_dma);
+		}
+	}
+}
+
+static void qedi_free_global_queues(struct qedi_ctx *qedi)
+{
+	int i;
+	struct global_queue **gl = qedi->global_queues;
+
+	for (i = 0; i < qedi->num_queues; i++) {
+		if (!gl[i])
+			continue;
+
+		if (gl[i]->cq)
+			dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
+					  gl[i]->cq, gl[i]->cq_dma);
+		if (gl[i]->cq_pbl)
+			dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
+					  gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
+
+		kfree(gl[i]);
+	}
+	qedi_free_bdq(qedi);
+}
+
+static int qedi_alloc_bdq(struct qedi_ctx *qedi)
+{
+	int i;
+	struct scsi_bd *pbl;
+	u64 *list;
+	dma_addr_t page;
+
+	/* Alloc dma memory for BDQ buffers */
+	for (i = 0; i < QEDI_BDQ_NUM; i++) {
+		qedi->bdq[i].buf_addr =
+				dma_alloc_coherent(&qedi->pdev->dev,
+						   QEDI_BDQ_BUF_SIZE,
+						   &qedi->bdq[i].buf_dma,
+						   GFP_KERNEL);
+		if (!qedi->bdq[i].buf_addr) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not allocate BDQ buffer %d.\n", i);
+			return -ENOMEM;
+		}
+	}
+
+	/* Alloc dma memory for BDQ page buffer list */
+	qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
+	qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
+	qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
+		  qedi->rq_num_entries);
+
+	qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
+					   qedi->bdq_pbl_mem_size,
+					   &qedi->bdq_pbl_dma, GFP_KERNEL);
+	if (!qedi->bdq_pbl) {
+		QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
+		return -ENOMEM;
+	}
+
+	/*
+	 * Populate BDQ PBL with physical and virtual address of individual
+	 * BDQ buffers
+	 */
+	pbl = (struct scsi_bd  *)qedi->bdq_pbl;
+	for (i = 0; i < QEDI_BDQ_NUM; i++) {
+		pbl->address.hi =
+				cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
+		pbl->address.lo =
+				cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
+			  pbl, pbl->address.hi, pbl->address.lo, i);
+		pbl->opaque.hi = 0;
+		pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(i));
+		pbl++;
+	}
+
+	/* Allocate list of PBL pages */
+	qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
+						PAGE_SIZE,
+						&qedi->bdq_pbl_list_dma,
+						GFP_KERNEL);
+	if (!qedi->bdq_pbl_list) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Could not allocate list of PBL pages.\n");
+		return -ENOMEM;
+	}
+	memset(qedi->bdq_pbl_list, 0, PAGE_SIZE);
+
+	/*
+	 * Now populate PBL list with pages that contain pointers to the
+	 * individual buffers.
+	 */
+	qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
+	list = (u64 *)qedi->bdq_pbl_list;
+	page = qedi->bdq_pbl_list_dma;
+	for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
+		*list = qedi->bdq_pbl_dma;
+		list++;
+		page += PAGE_SIZE;
+	}
+
+	return 0;
+}
+
+static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
+{
+	u32 *list;
+	int i;
+	int status = 0, rc;
+	u32 *pbl;
+	dma_addr_t page;
+	int num_pages;
+
+	/*
+	 * Number of global queues (CQ / RQ). This should
+	 * be <= number of available MSIX vectors for the PF
+	 */
+	if (!qedi->num_queues) {
+		QEDI_ERR(&qedi->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 (!qedi->p_cpuq) {
+		status = 1;
+		goto mem_alloc_failure;
+	}
+
+	qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
+				       qedi->num_queues), GFP_KERNEL);
+	if (!qedi->global_queues) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Unable to allocate global queues array ptr memory\n");
+		return -ENOMEM;
+	}
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "qedi->global_queues=%p.\n", qedi->global_queues);
+
+	/* Allocate DMA coherent buffers for BDQ */
+	rc = qedi_alloc_bdq(qedi);
+	if (rc)
+		goto mem_alloc_failure;
+
+	/* Allocate a CQ and an associated PBL for each MSI-X
+	 * vector.
+	 */
+	for (i = 0; i < qedi->num_queues; i++) {
+		qedi->global_queues[i] =
+					kzalloc(sizeof(*qedi->global_queues[0]),
+						GFP_KERNEL);
+		if (!qedi->global_queues[i]) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Unable to allocation global queue %d.\n", i);
+			goto mem_alloc_failure;
+		}
+
+		qedi->global_queues[i]->cq_mem_size =
+		    (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
+		qedi->global_queues[i]->cq_mem_size =
+		    (qedi->global_queues[i]->cq_mem_size +
+		    (QEDI_PAGE_SIZE - 1));
+
+		qedi->global_queues[i]->cq_pbl_size =
+		    (qedi->global_queues[i]->cq_mem_size /
+		    QEDI_PAGE_SIZE) * sizeof(void *);
+		qedi->global_queues[i]->cq_pbl_size =
+		    (qedi->global_queues[i]->cq_pbl_size +
+		    (QEDI_PAGE_SIZE - 1));
+
+		qedi->global_queues[i]->cq =
+		    dma_alloc_coherent(&qedi->pdev->dev,
+				       qedi->global_queues[i]->cq_mem_size,
+				       &qedi->global_queues[i]->cq_dma,
+				       GFP_KERNEL);
+
+		if (!qedi->global_queues[i]->cq) {
+			QEDI_WARN(&qedi->dbg_ctx,
+				  "Could not allocate cq.\n");
+			status = -ENOMEM;
+			goto mem_alloc_failure;
+		}
+		memset(qedi->global_queues[i]->cq, 0,
+		       qedi->global_queues[i]->cq_mem_size);
+
+		qedi->global_queues[i]->cq_pbl =
+		    dma_alloc_coherent(&qedi->pdev->dev,
+				       qedi->global_queues[i]->cq_pbl_size,
+				       &qedi->global_queues[i]->cq_pbl_dma,
+				       GFP_KERNEL);
+
+		if (!qedi->global_queues[i]->cq_pbl) {
+			QEDI_WARN(&qedi->dbg_ctx,
+				  "Could not allocate cq PBL.\n");
+			status = -ENOMEM;
+			goto mem_alloc_failure;
+		}
+		memset(qedi->global_queues[i]->cq_pbl, 0,
+		       qedi->global_queues[i]->cq_pbl_size);
+
+		/* Create PBL */
+		num_pages = qedi->global_queues[i]->cq_mem_size /
+		    QEDI_PAGE_SIZE;
+		page = qedi->global_queues[i]->cq_dma;
+		pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
+
+		while (num_pages--) {
+			*pbl = (u32)page;
+			pbl++;
+			*pbl = (u32)((u64)page >> 32);
+			pbl++;
+			page += QEDI_PAGE_SIZE;
+		}
+	}
+
+	list = (u32 *)qedi->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 < qedi->num_queues; i++) {
+		*list = (u32)qedi->global_queues[i]->cq_pbl_dma;
+		list++;
+		*list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
+		list++;
+
+		*list = (u32)0;
+		list++;
+		*list = (u32)((u64)0 >> 32);
+		list++;
+	}
+
+	return 0;
+
+mem_alloc_failure:
+	qedi_free_global_queues(qedi);
+	return status;
+}
+
+int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
+{
+	int rval = 0;
+	u32 *pbl;
+	dma_addr_t page;
+	int num_pages;
+
+	if (!ep)
+		return -EIO;
+
+	/* Calculate appropriate queue and PBL sizes */
+	ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
+	ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
+
+	ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
+	ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
+
+	ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
+				    &ep->sq_dma, GFP_KERNEL);
+	if (!ep->sq) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Could not allocate send queue.\n");
+		rval = -ENOMEM;
+		goto out;
+	}
+	memset(ep->sq, 0, ep->sq_mem_size);
+
+	ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
+					&ep->sq_pbl_dma, GFP_KERNEL);
+	if (!ep->sq_pbl) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Could not allocate send queue PBL.\n");
+		rval = -ENOMEM;
+		goto out_free_sq;
+	}
+	memset(ep->sq_pbl, 0, ep->sq_pbl_size);
+
+	/* Create PBL */
+	num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
+	page = ep->sq_dma;
+	pbl = (u32 *)ep->sq_pbl;
+
+	while (num_pages--) {
+		*pbl = (u32)page;
+		pbl++;
+		*pbl = (u32)((u64)page >> 32);
+		pbl++;
+		page += QEDI_PAGE_SIZE;
+	}
+
+	return rval;
+
+out_free_sq:
+	dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
+			  ep->sq_dma);
+out:
+	return rval;
+}
+
+void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
+{
+	if (ep->sq_pbl)
+		dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
+				  ep->sq_pbl_dma);
+	if (ep->sq)
+		dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
+				  ep->sq_dma);
+}
+
+int qedi_get_task_idx(struct qedi_ctx *qedi)
+{
+	s16 tmp_idx;
+
+again:
+	tmp_idx = find_first_zero_bit(qedi->task_idx_map,
+				      MAX_ISCSI_TASK_ENTRIES);
+
+	if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
+		QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
+		tmp_idx = -1;
+		goto err_idx;
+	}
+
+	if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
+		goto again;
+
+err_idx:
+	return tmp_idx;
+}
+
+void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
+{
+	if (!test_and_clear_bit(idx, qedi->task_idx_map)) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "FW task context, already cleared, tid=0x%x\n", idx);
+		WARN_ON(1);
+	}
+}
+
+void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
+			 struct qedi_cmd *cmd)
+{
+	qedi->itt_map[tid].itt = proto_itt;
+	qedi->itt_map[tid].p_cmd = cmd;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
+		  qedi->itt_map[tid].itt);
+}
+
+void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
+{
+	u16 i;
+
+	for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
+		if (qedi->itt_map[i].itt == itt) {
+			*tid = i;
+			QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+				  "Ref itt=0x%x, found at tid=0x%x\n",
+				  itt, *tid);
+			return;
+		}
+	}
+
+	WARN_ON(1);
+}
+
+void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
+{
+	*proto_itt = qedi->itt_map[tid].itt;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "Get itt map tid [0x%x with proto itt[0x%x]",
+		  tid, *proto_itt);
+}
+
+struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
+{
+	struct qedi_cmd *cmd = NULL;
+
+	if (tid > MAX_ISCSI_TASK_ENTRIES)
+		return NULL;
+
+	cmd = qedi->itt_map[tid].p_cmd;
+	if (cmd->task_id != tid)
+		return NULL;
+
+	qedi->itt_map[tid].p_cmd = NULL;
+
+	return cmd;
+}
+
+static int qedi_alloc_itt(struct qedi_ctx *qedi)
+{
+	qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
+				sizeof(struct qedi_itt_map), GFP_KERNEL);
+	if (!qedi->itt_map) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Unable to allocate itt map array memory\n");
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+static void qedi_free_itt(struct qedi_ctx *qedi)
+{
+	kfree(qedi->itt_map);
+}
+
+static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
+	.rx_cb = qedi_ll2_rx,
+	.tx_cb = NULL,
+};
+
+static int qedi_percpu_io_thread(void *arg)
+{
+	struct qedi_percpu_s *p = arg;
+	struct qedi_work *work, *tmp;
+	unsigned long flags;
+	LIST_HEAD(work_list);
+
+	set_user_nice(current, -20);
+
+	while (!kthread_should_stop()) {
+		spin_lock_irqsave(&p->p_work_lock, flags);
+		while (!list_empty(&p->work_list)) {
+			list_splice_init(&p->work_list, &work_list);
+			spin_unlock_irqrestore(&p->p_work_lock, flags);
+
+			list_for_each_entry_safe(work, tmp, &work_list, list) {
+				list_del_init(&work->list);
+				qedi_fp_process_cqes(work);
+				if (!work->is_solicited)
+					kfree(work);
+			}
+			cond_resched();
+			spin_lock_irqsave(&p->p_work_lock, flags);
+		}
+		set_current_state(TASK_INTERRUPTIBLE);
+		spin_unlock_irqrestore(&p->p_work_lock, flags);
+		schedule();
+	}
+	__set_current_state(TASK_RUNNING);
+
+	return 0;
+}
+
+static void qedi_percpu_thread_create(unsigned int cpu)
+{
+	struct qedi_percpu_s *p;
+	struct task_struct *thread;
+
+	p = &per_cpu(qedi_percpu, cpu);
+
+	thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
+					cpu_to_node(cpu),
+					"qedi_thread/%d", cpu);
+	if (likely(!IS_ERR(thread))) {
+		kthread_bind(thread, cpu);
+		p->iothread = thread;
+		wake_up_process(thread);
+	}
+}
+
+static void qedi_percpu_thread_destroy(unsigned int cpu)
+{
+	struct qedi_percpu_s *p;
+	struct task_struct *thread;
+	struct qedi_work *work, *tmp;
+
+	p = &per_cpu(qedi_percpu, cpu);
+	spin_lock_bh(&p->p_work_lock);
+	thread = p->iothread;
+	p->iothread = NULL;
+
+	list_for_each_entry_safe(work, tmp, &p->work_list, list) {
+		list_del_init(&work->list);
+		qedi_fp_process_cqes(work);
+		if (!work->is_solicited)
+			kfree(work);
+	}
+
+	spin_unlock_bh(&p->p_work_lock);
+	if (thread)
+		kthread_stop(thread);
+}
+
+static int qedi_cpu_callback(struct notifier_block *nfb,
+			     unsigned long action, void *hcpu)
+{
+	unsigned int cpu = (unsigned long)hcpu;
+
+	switch (action) {
+	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
+		QEDI_ERR(NULL, "CPU %d online.\n", cpu);
+		qedi_percpu_thread_create(cpu);
+		break;
+	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
+		QEDI_ERR(NULL, "CPU %d offline.\n", cpu);
+		qedi_percpu_thread_destroy(cpu);
+		break;
+	default:
+		break;
+	}
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block qedi_cpu_notifier = {
+	.notifier_call = qedi_cpu_callback,
+};
+
+void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
+{
+	struct qed_ll2_params params;
+
+	qedi_recover_all_conns(qedi);
+
+	qedi_ops->ll2->stop(qedi->cdev);
+	qedi_ll2_free_skbs(qedi);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
+		  qedi->ll2_mtu, mtu);
+	memset(&params, 0, sizeof(params));
+	qedi->ll2_mtu = mtu;
+	params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
+	params.drop_ttl0_packets = 0;
+	params.rx_vlan_stripping = 1;
+	ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
+	qedi_ops->ll2->start(qedi->cdev, &params);
+}
+
+static void __qedi_remove(struct pci_dev *pdev, int mode)
+{
+	struct qedi_ctx *qedi = pci_get_drvdata(pdev);
+
+	if (qedi->tmf_thread) {
+		flush_workqueue(qedi->tmf_thread);
+		destroy_workqueue(qedi->tmf_thread);
+		qedi->tmf_thread = NULL;
+	}
+
+	if (qedi->offload_thread) {
+		flush_workqueue(qedi->offload_thread);
+		destroy_workqueue(qedi->offload_thread);
+		qedi->offload_thread = NULL;
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_host_exit(&qedi->dbg_ctx);
+#endif
+	if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
+		qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
+
+	qedi_sync_free_irqs(qedi);
+
+	if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
+		qedi_ops->stop(qedi->cdev);
+		qedi_ops->ll2->stop(qedi->cdev);
+	}
+
+	if (mode == QEDI_MODE_NORMAL)
+		qedi_free_iscsi_pf_param(qedi);
+
+	if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
+		qedi_ops->common->slowpath_stop(qedi->cdev);
+		qedi_ops->common->remove(qedi->cdev);
+	}
+
+	qedi_destroy_fp(qedi);
+
+	if (mode == QEDI_MODE_NORMAL) {
+		qedi_release_cid_que(qedi);
+		qedi_cm_free_mem(qedi);
+		qedi_free_uio(qedi->udev);
+		qedi_free_itt(qedi);
+
+		iscsi_host_remove(qedi->shost);
+		iscsi_host_free(qedi->shost);
+
+		if (qedi->ll2_recv_thread) {
+			kthread_stop(qedi->ll2_recv_thread);
+			qedi->ll2_recv_thread = NULL;
+		}
+		qedi_ll2_free_skbs(qedi);
+	}
+}
+
+static int __qedi_probe(struct pci_dev *pdev, int mode)
+{
+	struct qedi_ctx *qedi;
+	struct qed_ll2_params params;
+	u32 dp_module = 0;
+	u8 dp_level = 0;
+	bool is_vf = false;
+	char host_buf[16];
+	struct qed_link_params link_params;
+	struct qed_slowpath_params sp_params;
+	struct qed_probe_params qed_params;
+	void *task_start, *task_end;
+	int rc;
+	u16 tmp;
+
+	if (mode != QEDI_MODE_RECOVERY) {
+		qedi = qedi_host_alloc(pdev);
+		if (!qedi) {
+			rc = -ENOMEM;
+			goto exit_probe;
+		}
+	} else {
+		qedi = pci_get_drvdata(pdev);
+	}
+
+	memset(&qed_params, 0, sizeof(qed_params));
+	qed_params.protocol = QED_PROTOCOL_ISCSI;
+	qed_params.dp_module = dp_module;
+	qed_params.dp_level = dp_level;
+	qed_params.is_vf = is_vf;
+	qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
+	if (!qedi->cdev) {
+		rc = -ENODEV;
+		QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
+		goto free_host;
+	}
+
+	qedi->msix_count = MAX_NUM_MSIX_PF;
+	atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
+
+	if (mode != QEDI_MODE_RECOVERY) {
+		rc = qedi_set_iscsi_pf_param(qedi);
+		if (rc) {
+			rc = -ENOMEM;
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Set iSCSI pf param fail\n");
+			goto free_host;
+		}
+	}
+
+	qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
+
+	rc = qedi_prepare_fp(qedi);
+	if (rc) {
+		QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
+		goto free_pf_params;
+	}
+
+	/* Start the Slowpath-process */
+	memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
+	sp_params.int_mode = QED_INT_MODE_MSIX;
+	sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
+	sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
+	sp_params.drv_rev = QEDI_DRIVER_REV_VER;
+	sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
+	strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
+	rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
+	if (rc) {
+		QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
+		goto stop_hw;
+	}
+
+	/* update_pf_params needs to be called before and after slowpath
+	 * start
+	 */
+	qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
+
+	qedi_setup_int(qedi);
+	if (rc)
+		goto stop_iscsi_func;
+
+	qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
+
+	/* Learn information crucial for qedi to progress */
+	rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
+	if (rc)
+		goto stop_iscsi_func;
+
+	/* Record BDQ producer doorbell addresses */
+	qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
+	qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "BDQ primary_prod=%p secondary_prod=%p.\n",
+		  qedi->bdq_primary_prod,
+		  qedi->bdq_secondary_prod);
+
+	/*
+	 * 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.
+	 */
+	qedi->bdq_prod_idx = QEDI_BDQ_NUM;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "Writing %d to primary and secondary BDQ doorbell registers.\n",
+		  qedi->bdq_prod_idx);
+	writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
+	tmp = readw(qedi->bdq_primary_prod);
+	writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
+	tmp = readw(qedi->bdq_secondary_prod);
+
+	ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
+		  qedi->mac);
+
+	sprintf(host_buf, "host_%d", qedi->shost->host_no);
+	qedi_ops->common->set_id(qedi->cdev, host_buf, QEDI_MODULE_VERSION);
+
+	qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
+
+	memset(&params, 0, sizeof(params));
+	params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
+	qedi->ll2_mtu = DEF_PATH_MTU;
+	params.drop_ttl0_packets = 0;
+	params.rx_vlan_stripping = 1;
+	ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
+
+	if (mode != QEDI_MODE_RECOVERY) {
+		/* set up rx path */
+		INIT_LIST_HEAD(&qedi->ll2_skb_list);
+		spin_lock_init(&qedi->ll2_lock);
+		/* start qedi context */
+		spin_lock_init(&qedi->hba_lock);
+		spin_lock_init(&qedi->task_idx_lock);
+	}
+	qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
+	qedi_ops->ll2->start(qedi->cdev, &params);
+
+	if (mode != QEDI_MODE_RECOVERY) {
+		qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
+						    (void *)qedi,
+						    "qedi_ll2_thread");
+	}
+
+	rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
+			     qedi, qedi_iscsi_event_cb);
+	if (rc) {
+		rc = -ENODEV;
+		QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
+		goto stop_slowpath;
+	}
+
+	task_start = qedi_get_task_mem(&qedi->tasks, 0);
+	task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "Task context start=%p, end=%p block_size=%u.\n",
+		   task_start, task_end, qedi->tasks.size);
+
+	memset(&link_params, 0, sizeof(link_params));
+	link_params.link_up = true;
+	rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
+	if (rc) {
+		QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
+		atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
+			   &qedi_dbg_fops);
+#endif
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
+		  QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
+		  FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
+
+	if (mode == QEDI_MODE_NORMAL) {
+		if (iscsi_host_add(qedi->shost, &pdev->dev)) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not add iscsi host\n");
+			rc = -ENOMEM;
+			goto remove_host;
+		}
+
+		/* Allocate uio buffers */
+		rc = qedi_alloc_uio_rings(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "UIO alloc ring failed err=%d\n", rc);
+			goto remove_host;
+		}
+
+		rc = qedi_init_uio(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "UIO init failed, err=%d\n", rc);
+			goto free_uio;
+		}
+
+		/* host the array on iscsi_conn */
+		rc = qedi_setup_cid_que(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not setup cid que\n");
+			goto free_uio;
+		}
+
+		rc = qedi_cm_alloc_mem(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not alloc cm memory\n");
+			goto free_cid_que;
+		}
+
+		rc = qedi_alloc_itt(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not alloc itt memory\n");
+			goto free_cid_que;
+		}
+
+		sprintf(host_buf, "host_%d", qedi->shost->host_no);
+		qedi->tmf_thread = create_singlethread_workqueue(host_buf);
+		if (!qedi->tmf_thread) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Unable to start tmf thread!\n");
+			rc = -ENODEV;
+			goto free_cid_que;
+		}
+
+		sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
+		qedi->offload_thread = create_workqueue(host_buf);
+		if (!qedi->offload_thread) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Unable to start offload thread!\n");
+			rc = -ENODEV;
+			goto free_cid_que;
+		}
+
+		/* F/w needs 1st task context memory entry for performance */
+		set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
+		atomic_set(&qedi->num_offloads, 0);
+	}
+
+	return 0;
+
+free_cid_que:
+	qedi_release_cid_que(qedi);
+free_uio:
+	qedi_free_uio(qedi->udev);
+remove_host:
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_host_exit(&qedi->dbg_ctx);
+#endif
+	iscsi_host_remove(qedi->shost);
+stop_iscsi_func:
+	qedi_ops->stop(qedi->cdev);
+stop_slowpath:
+	qedi_ops->common->slowpath_stop(qedi->cdev);
+stop_hw:
+	qedi_ops->common->remove(qedi->cdev);
+free_pf_params:
+	qedi_free_iscsi_pf_param(qedi);
+free_host:
+	iscsi_host_free(qedi->shost);
+exit_probe:
+	return rc;
+}
+
+static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	return __qedi_probe(pdev, QEDI_MODE_NORMAL);
+}
+
+static void qedi_remove(struct pci_dev *pdev)
+{
+	__qedi_remove(pdev, QEDI_MODE_NORMAL);
+}
+
+static struct pci_device_id qedi_pci_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
+	{ 0 },
+};
+MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
+
+static struct pci_driver qedi_pci_driver = {
+	.name = QEDI_MODULE_NAME,
+	.id_table = qedi_pci_tbl,
+	.probe = qedi_probe,
+	.remove = qedi_remove,
+};
+
+static int __init qedi_init(void)
+{
+	int rc = 0;
+	int ret;
+	struct qedi_percpu_s *p;
+	unsigned int cpu = 0;
+
+	qedi_ops = qed_get_iscsi_ops();
+	if (!qedi_ops) {
+		QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
+		rc = -EINVAL;
+		goto exit_qedi_init_0;
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_init("qedi");
+#endif
+
+	qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
+	if (!qedi_scsi_transport) {
+		QEDI_ERR(NULL, "Could not register qedi transport");
+		rc = -ENOMEM;
+		goto exit_qedi_init_1;
+	}
+
+	register_hotcpu_notifier(&qedi_cpu_notifier);
+
+	ret = pci_register_driver(&qedi_pci_driver);
+	if (ret) {
+		QEDI_ERR(NULL, "Failed to register driver\n");
+		rc = -EINVAL;
+		goto exit_qedi_init_2;
+	}
+
+	for_each_possible_cpu(cpu) {
+		p = &per_cpu(qedi_percpu, cpu);
+		INIT_LIST_HEAD(&p->work_list);
+		spin_lock_init(&p->p_work_lock);
+		p->iothread = NULL;
+	}
+
+	for_each_online_cpu(cpu)
+		qedi_percpu_thread_create(cpu);
+
+	return rc;
+
+exit_qedi_init_2:
+	iscsi_unregister_transport(&qedi_iscsi_transport);
+exit_qedi_init_1:
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_exit();
+#endif
+	qed_put_iscsi_ops();
+exit_qedi_init_0:
+	return rc;
+}
+
+static void __exit qedi_cleanup(void)
+{
+	unsigned int cpu = 0;
+
+	for_each_online_cpu(cpu)
+		qedi_percpu_thread_destroy(cpu);
+
+	pci_unregister_driver(&qedi_pci_driver);
+	unregister_hotcpu_notifier(&qedi_cpu_notifier);
+	iscsi_unregister_transport(&qedi_iscsi_transport);
+
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_exit();
+#endif
+	qed_put_iscsi_ops();
+}
+
+MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("QLogic Corporation");
+MODULE_VERSION(QEDI_MODULE_VERSION);
+module_init(qedi_init);
+module_exit(qedi_cleanup);

drivers/scsi/qedi/qedi_sysfs.c

+/*
+ * QLogic iSCSI 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 "qedi.h"
+#include "qedi_gbl.h"
+#include "qedi_iscsi.h"
+#include "qedi_dbg.h"
+
+static inline struct qedi_ctx *qedi_dev_to_hba(struct device *dev)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+
+	return iscsi_host_priv(shost);
+}
+
+static ssize_t qedi_show_port_state(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct qedi_ctx *qedi = qedi_dev_to_hba(dev);
+
+	if (atomic_read(&qedi->link_state) == QEDI_LINK_UP)
+		return sprintf(buf, "Online\n");
+	else
+		return sprintf(buf, "Linkdown\n");
+}
+
+static ssize_t qedi_show_speed(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct qedi_ctx *qedi = qedi_dev_to_hba(dev);
+	struct qed_link_output if_link;
+
+	qedi_ops->common->get_link(qedi->cdev, &if_link);
+
+	return sprintf(buf, "%d Gbit\n", if_link.speed / 1000);
+}
+
+static DEVICE_ATTR(port_state, 0444, qedi_show_port_state, NULL);
+static DEVICE_ATTR(speed, 0444, qedi_show_speed, NULL);
+
+struct device_attribute *qedi_shost_attrs[] = {
+	&dev_attr_port_state,
+	&dev_attr_speed,
+	NULL
+};

drivers/scsi/qedi/qedi_version.h

+/*
+ * QLogic iSCSI 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 QEDI_MODULE_VERSION	"8.10.3.0"
+#define QEDI_DRIVER_MAJOR_VER		8
+#define QEDI_DRIVER_MINOR_VER		10
+#define QEDI_DRIVER_REV_VER		3
+#define QEDI_DRIVER_ENG_VER		0