Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2720 insertions, 0 deletions

diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
new file mode 100644
index 0000000000..416d819548
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -0,0 +1,2720 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ */
+#include <linux/mempool.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/workqueue.h>
+#include <linux/pci.h>
+#include <linux/scatterlist.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/delay.h>
+#include <linux/gfp.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_fcoe.h>
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+#include "fnic_io.h"
+#include "fnic.h"
+
+const char *fnic_state_str[] = {
+	[FNIC_IN_FC_MODE] =           "FNIC_IN_FC_MODE",
+	[FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
+	[FNIC_IN_ETH_MODE] =          "FNIC_IN_ETH_MODE",
+	[FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
+};
+
+static const char *fnic_ioreq_state_str[] = {
+	[FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
+	[FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
+	[FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
+	[FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
+	[FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
+};
+
+static const char *fcpio_status_str[] =  {
+	[FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
+	[FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
+	[FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
+	[FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
+	[FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
+	[FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
+	[FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
+	[FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
+	[FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
+	[FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
+	[FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
+	[FCPIO_FW_ERR] = "FCPIO_FW_ERR",
+	[FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
+	[FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
+	[FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
+	[FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
+	[FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
+	[FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
+	[FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
+};
+
+const char *fnic_state_to_str(unsigned int state)
+{
+	if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
+		return "unknown";
+
+	return fnic_state_str[state];
+}
+
+static const char *fnic_ioreq_state_to_str(unsigned int state)
+{
+	if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
+	    !fnic_ioreq_state_str[state])
+		return "unknown";
+
+	return fnic_ioreq_state_str[state];
+}
+
+static const char *fnic_fcpio_status_to_str(unsigned int status)
+{
+	if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
+		return "unknown";
+
+	return fcpio_status_str[status];
+}
+
+static void fnic_cleanup_io(struct fnic *fnic);
+
+static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
+					    struct scsi_cmnd *sc)
+{
+	u32 hash = scsi_cmd_to_rq(sc)->tag & (FNIC_IO_LOCKS - 1);
+
+	return &fnic->io_req_lock[hash];
+}
+
+static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
+					    int tag)
+{
+	return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
+}
+
+/*
+ * Unmap the data buffer and sense buffer for an io_req,
+ * also unmap and free the device-private scatter/gather list.
+ */
+static void fnic_release_ioreq_buf(struct fnic *fnic,
+				   struct fnic_io_req *io_req,
+				   struct scsi_cmnd *sc)
+{
+	if (io_req->sgl_list_pa)
+		dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
+				 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
+				 DMA_TO_DEVICE);
+	scsi_dma_unmap(sc);
+
+	if (io_req->sgl_cnt)
+		mempool_free(io_req->sgl_list_alloc,
+			     fnic->io_sgl_pool[io_req->sgl_type]);
+	if (io_req->sense_buf_pa)
+		dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa,
+				 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
+}
+
+/* Free up Copy Wq descriptors. Called with copy_wq lock held */
+static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
+{
+	/* if no Ack received from firmware, then nothing to clean */
+	if (!fnic->fw_ack_recd[0])
+		return 1;
+
+	/*
+	 * Update desc_available count based on number of freed descriptors
+	 * Account for wraparound
+	 */
+	if (wq->to_clean_index <= fnic->fw_ack_index[0])
+		wq->ring.desc_avail += (fnic->fw_ack_index[0]
+					- wq->to_clean_index + 1);
+	else
+		wq->ring.desc_avail += (wq->ring.desc_count
+					- wq->to_clean_index
+					+ fnic->fw_ack_index[0] + 1);
+
+	/*
+	 * just bump clean index to ack_index+1 accounting for wraparound
+	 * this will essentially free up all descriptors between
+	 * to_clean_index and fw_ack_index, both inclusive
+	 */
+	wq->to_clean_index =
+		(fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
+
+	/* we have processed the acks received so far */
+	fnic->fw_ack_recd[0] = 0;
+	return 0;
+}
+
+
+/*
+ * __fnic_set_state_flags
+ * Sets/Clears bits in fnic's state_flags
+ **/
+void
+__fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
+			unsigned long clearbits)
+{
+	unsigned long flags = 0;
+	unsigned long host_lock_flags = 0;
+
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+	spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags);
+
+	if (clearbits)
+		fnic->state_flags &= ~st_flags;
+	else
+		fnic->state_flags |= st_flags;
+
+	spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags);
+	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+	return;
+}
+
+
+/*
+ * fnic_fw_reset_handler
+ * Routine to send reset msg to fw
+ */
+int fnic_fw_reset_handler(struct fnic *fnic)
+{
+	struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+	int ret = 0;
+	unsigned long flags;
+
+	/* indicate fwreset to io path */
+	fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
+
+	skb_queue_purge(&fnic->frame_queue);
+	skb_queue_purge(&fnic->tx_queue);
+
+	/* wait for io cmpl */
+	while (atomic_read(&fnic->in_flight))
+		schedule_timeout(msecs_to_jiffies(1));
+
+	spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+	if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+		free_wq_copy_descs(fnic, wq);
+
+	if (!vnic_wq_copy_desc_avail(wq))
+		ret = -EAGAIN;
+	else {
+		fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
+		atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
+		if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
+			  atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
+			atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
+				atomic64_read(
+				  &fnic->fnic_stats.fw_stats.active_fw_reqs));
+	}
+
+	spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+
+	if (!ret) {
+		atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "Issued fw reset\n");
+	} else {
+		fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "Failed to issue fw reset\n");
+	}
+
+	return ret;
+}
+
+
+/*
+ * fnic_flogi_reg_handler
+ * Routine to send flogi register msg to fw
+ */
+int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
+{
+	struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+	enum fcpio_flogi_reg_format_type format;
+	struct fc_lport *lp = fnic->lport;
+	u8 gw_mac[ETH_ALEN];
+	int ret = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+	if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+		free_wq_copy_descs(fnic, wq);
+
+	if (!vnic_wq_copy_desc_avail(wq)) {
+		ret = -EAGAIN;
+		goto flogi_reg_ioreq_end;
+	}
+
+	if (fnic->ctlr.map_dest) {
+		eth_broadcast_addr(gw_mac);
+		format = FCPIO_FLOGI_REG_DEF_DEST;
+	} else {
+		memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
+		format = FCPIO_FLOGI_REG_GW_DEST;
+	}
+
+	if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
+		fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
+						fc_id, gw_mac,
+						fnic->data_src_addr,
+						lp->r_a_tov, lp->e_d_tov);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
+			      fc_id, fnic->data_src_addr, gw_mac);
+	} else {
+		fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
+						  format, fc_id, gw_mac);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "FLOGI reg issued fcid %x map %d dest %pM\n",
+			      fc_id, fnic->ctlr.map_dest, gw_mac);
+	}
+
+	atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
+	if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
+		  atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
+		atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
+		  atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
+
+flogi_reg_ioreq_end:
+	spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+	return ret;
+}
+
+/*
+ * fnic_queue_wq_copy_desc
+ * Routine to enqueue a wq copy desc
+ */
+static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
+					  struct vnic_wq_copy *wq,
+					  struct fnic_io_req *io_req,
+					  struct scsi_cmnd *sc,
+					  int sg_count)
+{
+	struct scatterlist *sg;
+	struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
+	struct fc_rport_libfc_priv *rp = rport->dd_data;
+	struct host_sg_desc *desc;
+	struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
+	unsigned int i;
+	unsigned long intr_flags;
+	int flags;
+	u8 exch_flags;
+	struct scsi_lun fc_lun;
+
+	if (sg_count) {
+		/* For each SGE, create a device desc entry */
+		desc = io_req->sgl_list;
+		for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
+			desc->addr = cpu_to_le64(sg_dma_address(sg));
+			desc->len = cpu_to_le32(sg_dma_len(sg));
+			desc->_resvd = 0;
+			desc++;
+		}
+
+		io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev,
+				io_req->sgl_list,
+				sizeof(io_req->sgl_list[0]) * sg_count,
+				DMA_TO_DEVICE);
+		if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) {
+			printk(KERN_ERR "DMA mapping failed\n");
+			return SCSI_MLQUEUE_HOST_BUSY;
+		}
+	}
+
+	io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev,
+					      sc->sense_buffer,
+					      SCSI_SENSE_BUFFERSIZE,
+					      DMA_FROM_DEVICE);
+	if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) {
+		dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
+				sizeof(io_req->sgl_list[0]) * sg_count,
+				DMA_TO_DEVICE);
+		printk(KERN_ERR "DMA mapping failed\n");
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+
+	int_to_scsilun(sc->device->lun, &fc_lun);
+
+	/* Enqueue the descriptor in the Copy WQ */
+	spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
+
+	if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+		free_wq_copy_descs(fnic, wq);
+
+	if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
+		spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+		FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+			  "fnic_queue_wq_copy_desc failure - no descriptors\n");
+		atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+
+	flags = 0;
+	if (sc->sc_data_direction == DMA_FROM_DEVICE)
+		flags = FCPIO_ICMND_RDDATA;
+	else if (sc->sc_data_direction == DMA_TO_DEVICE)
+		flags = FCPIO_ICMND_WRDATA;
+
+	exch_flags = 0;
+	if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
+	    (rp->flags & FC_RP_FLAGS_RETRY))
+		exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
+
+	fnic_queue_wq_copy_desc_icmnd_16(wq, scsi_cmd_to_rq(sc)->tag,
+					 0, exch_flags, io_req->sgl_cnt,
+					 SCSI_SENSE_BUFFERSIZE,
+					 io_req->sgl_list_pa,
+					 io_req->sense_buf_pa,
+					 0, /* scsi cmd ref, always 0 */
+					 FCPIO_ICMND_PTA_SIMPLE,
+					 	/* scsi pri and tag */
+					 flags,	/* command flags */
+					 sc->cmnd, sc->cmd_len,
+					 scsi_bufflen(sc),
+					 fc_lun.scsi_lun, io_req->port_id,
+					 rport->maxframe_size, rp->r_a_tov,
+					 rp->e_d_tov);
+
+	atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
+	if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
+		  atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
+		atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
+		  atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
+
+	spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+	return 0;
+}
+
+/*
+ * fnic_queuecommand
+ * Routine to send a scsi cdb
+ * Called with host_lock held and interrupts disabled.
+ */
+static int fnic_queuecommand_lck(struct scsi_cmnd *sc)
+{
+	void (*done)(struct scsi_cmnd *) = scsi_done;
+	const int tag = scsi_cmd_to_rq(sc)->tag;
+	struct fc_lport *lp = shost_priv(sc->device->host);
+	struct fc_rport *rport;
+	struct fnic_io_req *io_req = NULL;
+	struct fnic *fnic = lport_priv(lp);
+	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
+	struct vnic_wq_copy *wq;
+	int ret;
+	u64 cmd_trace;
+	int sg_count = 0;
+	unsigned long flags = 0;
+	unsigned long ptr;
+	spinlock_t *io_lock = NULL;
+	int io_lock_acquired = 0;
+	struct fc_rport_libfc_priv *rp;
+
+	if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
+		return SCSI_MLQUEUE_HOST_BUSY;
+
+	if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET)))
+		return SCSI_MLQUEUE_HOST_BUSY;
+
+	rport = starget_to_rport(scsi_target(sc->device));
+	if (!rport) {
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+				"returning DID_NO_CONNECT for IO as rport is NULL\n");
+		sc->result = DID_NO_CONNECT << 16;
+		done(sc);
+		return 0;
+	}
+
+	ret = fc_remote_port_chkready(rport);
+	if (ret) {
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+				"rport is not ready\n");
+		atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
+		sc->result = ret;
+		done(sc);
+		return 0;
+	}
+
+	rp = rport->dd_data;
+	if (!rp || rp->rp_state == RPORT_ST_DELETE) {
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			"rport 0x%x removed, returning DID_NO_CONNECT\n",
+			rport->port_id);
+
+		atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
+		sc->result = DID_NO_CONNECT<<16;
+		done(sc);
+		return 0;
+	}
+
+	if (rp->rp_state != RPORT_ST_READY) {
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			"rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n",
+			rport->port_id, rp->rp_state);
+
+		sc->result = DID_IMM_RETRY << 16;
+		done(sc);
+		return 0;
+	}
+
+	if (lp->state != LPORT_ST_READY || !(lp->link_up))
+		return SCSI_MLQUEUE_HOST_BUSY;
+
+	atomic_inc(&fnic->in_flight);
+
+	/*
+	 * Release host lock, use driver resource specific locks from here.
+	 * Don't re-enable interrupts in case they were disabled prior to the
+	 * caller disabling them.
+	 */
+	spin_unlock(lp->host->host_lock);
+	fnic_priv(sc)->state = FNIC_IOREQ_NOT_INITED;
+	fnic_priv(sc)->flags = FNIC_NO_FLAGS;
+
+	/* Get a new io_req for this SCSI IO */
+	io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
+	if (!io_req) {
+		atomic64_inc(&fnic_stats->io_stats.alloc_failures);
+		ret = SCSI_MLQUEUE_HOST_BUSY;
+		goto out;
+	}
+	memset(io_req, 0, sizeof(*io_req));
+
+	/* Map the data buffer */
+	sg_count = scsi_dma_map(sc);
+	if (sg_count < 0) {
+		FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
+			  tag, sc, 0, sc->cmnd[0], sg_count, fnic_priv(sc)->state);
+		mempool_free(io_req, fnic->io_req_pool);
+		goto out;
+	}
+
+	/* Determine the type of scatter/gather list we need */
+	io_req->sgl_cnt = sg_count;
+	io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
+	if (sg_count > FNIC_DFLT_SG_DESC_CNT)
+		io_req->sgl_type = FNIC_SGL_CACHE_MAX;
+
+	if (sg_count) {
+		io_req->sgl_list =
+			mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
+				      GFP_ATOMIC);
+		if (!io_req->sgl_list) {
+			atomic64_inc(&fnic_stats->io_stats.alloc_failures);
+			ret = SCSI_MLQUEUE_HOST_BUSY;
+			scsi_dma_unmap(sc);
+			mempool_free(io_req, fnic->io_req_pool);
+			goto out;
+		}
+
+		/* Cache sgl list allocated address before alignment */
+		io_req->sgl_list_alloc = io_req->sgl_list;
+		ptr = (unsigned long) io_req->sgl_list;
+		if (ptr % FNIC_SG_DESC_ALIGN) {
+			io_req->sgl_list = (struct host_sg_desc *)
+				(((unsigned long) ptr
+				  + FNIC_SG_DESC_ALIGN - 1)
+				 & ~(FNIC_SG_DESC_ALIGN - 1));
+		}
+	}
+
+	/*
+	* Will acquire lock defore setting to IO initialized.
+	*/
+
+	io_lock = fnic_io_lock_hash(fnic, sc);
+	spin_lock_irqsave(io_lock, flags);
+
+	/* initialize rest of io_req */
+	io_lock_acquired = 1;
+	io_req->port_id = rport->port_id;
+	io_req->start_time = jiffies;
+	fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING;
+	fnic_priv(sc)->io_req = io_req;
+	fnic_priv(sc)->flags |= FNIC_IO_INITIALIZED;
+
+	/* create copy wq desc and enqueue it */
+	wq = &fnic->wq_copy[0];
+	ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
+	if (ret) {
+		/*
+		 * In case another thread cancelled the request,
+		 * refetch the pointer under the lock.
+		 */
+		FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
+			  tag, sc, 0, 0, 0, fnic_flags_and_state(sc));
+		io_req = fnic_priv(sc)->io_req;
+		fnic_priv(sc)->io_req = NULL;
+		fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE;
+		spin_unlock_irqrestore(io_lock, flags);
+		if (io_req) {
+			fnic_release_ioreq_buf(fnic, io_req, sc);
+			mempool_free(io_req, fnic->io_req_pool);
+		}
+		atomic_dec(&fnic->in_flight);
+		/* acquire host lock before returning to SCSI */
+		spin_lock(lp->host->host_lock);
+		return ret;
+	} else {
+		atomic64_inc(&fnic_stats->io_stats.active_ios);
+		atomic64_inc(&fnic_stats->io_stats.num_ios);
+		if (atomic64_read(&fnic_stats->io_stats.active_ios) >
+			  atomic64_read(&fnic_stats->io_stats.max_active_ios))
+			atomic64_set(&fnic_stats->io_stats.max_active_ios,
+			     atomic64_read(&fnic_stats->io_stats.active_ios));
+
+		/* REVISIT: Use per IO lock in the final code */
+		fnic_priv(sc)->flags |= FNIC_IO_ISSUED;
+	}
+out:
+	cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
+			(u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
+			(u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
+			sc->cmnd[5]);
+
+	FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
+		   tag, sc, io_req, sg_count, cmd_trace,
+		   fnic_flags_and_state(sc));
+
+	/* if only we issued IO, will we have the io lock */
+	if (io_lock_acquired)
+		spin_unlock_irqrestore(io_lock, flags);
+
+	atomic_dec(&fnic->in_flight);
+	/* acquire host lock before returning to SCSI */
+	spin_lock(lp->host->host_lock);
+	return ret;
+}
+
+DEF_SCSI_QCMD(fnic_queuecommand)
+
+/*
+ * fnic_fcpio_fw_reset_cmpl_handler
+ * Routine to handle fw reset completion
+ */
+static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
+					    struct fcpio_fw_req *desc)
+{
+	u8 type;
+	u8 hdr_status;
+	struct fcpio_tag tag;
+	int ret = 0;
+	unsigned long flags;
+	struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
+
+	fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+
+	atomic64_inc(&reset_stats->fw_reset_completions);
+
+	/* Clean up all outstanding io requests */
+	fnic_cleanup_io(fnic);
+
+	atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
+	atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
+	atomic64_set(&fnic->io_cmpl_skip, 0);
+
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+	/* fnic should be in FC_TRANS_ETH_MODE */
+	if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
+		/* Check status of reset completion */
+		if (!hdr_status) {
+			FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+				      "reset cmpl success\n");
+			/* Ready to send flogi out */
+			fnic->state = FNIC_IN_ETH_MODE;
+		} else {
+			FNIC_SCSI_DBG(KERN_DEBUG,
+				      fnic->lport->host,
+				      "fnic fw_reset : failed %s\n",
+				      fnic_fcpio_status_to_str(hdr_status));
+
+			/*
+			 * Unable to change to eth mode, cannot send out flogi
+			 * Change state to fc mode, so that subsequent Flogi
+			 * requests from libFC will cause more attempts to
+			 * reset the firmware. Free the cached flogi
+			 */
+			fnic->state = FNIC_IN_FC_MODE;
+			atomic64_inc(&reset_stats->fw_reset_failures);
+			ret = -1;
+		}
+	} else {
+		FNIC_SCSI_DBG(KERN_DEBUG,
+			      fnic->lport->host,
+			      "Unexpected state %s while processing"
+			      " reset cmpl\n", fnic_state_to_str(fnic->state));
+		atomic64_inc(&reset_stats->fw_reset_failures);
+		ret = -1;
+	}
+
+	/* Thread removing device blocks till firmware reset is complete */
+	if (fnic->remove_wait)
+		complete(fnic->remove_wait);
+
+	/*
+	 * If fnic is being removed, or fw reset failed
+	 * free the flogi frame. Else, send it out
+	 */
+	if (fnic->remove_wait || ret) {
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		skb_queue_purge(&fnic->tx_queue);
+		goto reset_cmpl_handler_end;
+	}
+
+	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+	fnic_flush_tx(fnic);
+
+ reset_cmpl_handler_end:
+	fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
+
+	return ret;
+}
+
+/*
+ * fnic_fcpio_flogi_reg_cmpl_handler
+ * Routine to handle flogi register completion
+ */
+static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
+					     struct fcpio_fw_req *desc)
+{
+	u8 type;
+	u8 hdr_status;
+	struct fcpio_tag tag;
+	int ret = 0;
+	unsigned long flags;
+
+	fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+
+	/* Update fnic state based on status of flogi reg completion */
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+	if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
+
+		/* Check flogi registration completion status */
+		if (!hdr_status) {
+			FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+				      "flog reg succeeded\n");
+			fnic->state = FNIC_IN_FC_MODE;
+		} else {
+			FNIC_SCSI_DBG(KERN_DEBUG,
+				      fnic->lport->host,
+				      "fnic flogi reg :failed %s\n",
+				      fnic_fcpio_status_to_str(hdr_status));
+			fnic->state = FNIC_IN_ETH_MODE;
+			ret = -1;
+		}
+	} else {
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "Unexpected fnic state %s while"
+			      " processing flogi reg completion\n",
+			      fnic_state_to_str(fnic->state));
+		ret = -1;
+	}
+
+	if (!ret) {
+		if (fnic->stop_rx_link_events) {
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			goto reg_cmpl_handler_end;
+		}
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+		fnic_flush_tx(fnic);
+		queue_work(fnic_event_queue, &fnic->frame_work);
+	} else {
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+	}
+
+reg_cmpl_handler_end:
+	return ret;
+}
+
+static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
+					u16 request_out)
+{
+	if (wq->to_clean_index <= wq->to_use_index) {
+		/* out of range, stale request_out index */
+		if (request_out < wq->to_clean_index ||
+		    request_out >= wq->to_use_index)
+			return 0;
+	} else {
+		/* out of range, stale request_out index */
+		if (request_out < wq->to_clean_index &&
+		    request_out >= wq->to_use_index)
+			return 0;
+	}
+	/* request_out index is in range */
+	return 1;
+}
+
+
+/*
+ * Mark that ack received and store the Ack index. If there are multiple
+ * acks received before Tx thread cleans it up, the latest value will be
+ * used which is correct behavior. This state should be in the copy Wq
+ * instead of in the fnic
+ */
+static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
+					  unsigned int cq_index,
+					  struct fcpio_fw_req *desc)
+{
+	struct vnic_wq_copy *wq;
+	u16 request_out = desc->u.ack.request_out;
+	unsigned long flags;
+	u64 *ox_id_tag = (u64 *)(void *)desc;
+
+	/* mark the ack state */
+	wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
+	spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+	fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
+	if (is_ack_index_in_range(wq, request_out)) {
+		fnic->fw_ack_index[0] = request_out;
+		fnic->fw_ack_recd[0] = 1;
+	} else
+		atomic64_inc(
+			&fnic->fnic_stats.misc_stats.ack_index_out_of_range);
+
+	spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+	FNIC_TRACE(fnic_fcpio_ack_handler,
+		  fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
+		  ox_id_tag[4], ox_id_tag[5]);
+}
+
+/*
+ * fnic_fcpio_icmnd_cmpl_handler
+ * Routine to handle icmnd completions
+ */
+static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
+					 struct fcpio_fw_req *desc)
+{
+	u8 type;
+	u8 hdr_status;
+	struct fcpio_tag tag;
+	u32 id;
+	u64 xfer_len = 0;
+	struct fcpio_icmnd_cmpl *icmnd_cmpl;
+	struct fnic_io_req *io_req;
+	struct scsi_cmnd *sc;
+	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
+	unsigned long flags;
+	spinlock_t *io_lock;
+	u64 cmd_trace;
+	unsigned long start_time;
+	unsigned long io_duration_time;
+
+	/* Decode the cmpl description to get the io_req id */
+	fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+	fcpio_tag_id_dec(&tag, &id);
+	icmnd_cmpl = &desc->u.icmnd_cmpl;
+
+	if (id >= fnic->fnic_max_tag_id) {
+		shost_printk(KERN_ERR, fnic->lport->host,
+			"Tag out of range tag %x hdr status = %s\n",
+			     id, fnic_fcpio_status_to_str(hdr_status));
+		return;
+	}
+
+	sc = scsi_host_find_tag(fnic->lport->host, id);
+	WARN_ON_ONCE(!sc);
+	if (!sc) {
+		atomic64_inc(&fnic_stats->io_stats.sc_null);
+		shost_printk(KERN_ERR, fnic->lport->host,
+			  "icmnd_cmpl sc is null - "
+			  "hdr status = %s tag = 0x%x desc = 0x%p\n",
+			  fnic_fcpio_status_to_str(hdr_status), id, desc);
+		FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
+			  fnic->lport->host->host_no, id,
+			  ((u64)icmnd_cmpl->_resvd0[1] << 16 |
+			  (u64)icmnd_cmpl->_resvd0[0]),
+			  ((u64)hdr_status << 16 |
+			  (u64)icmnd_cmpl->scsi_status << 8 |
+			  (u64)icmnd_cmpl->flags), desc,
+			  (u64)icmnd_cmpl->residual, 0);
+		return;
+	}
+
+	io_lock = fnic_io_lock_hash(fnic, sc);
+	spin_lock_irqsave(io_lock, flags);
+	io_req = fnic_priv(sc)->io_req;
+	WARN_ON_ONCE(!io_req);
+	if (!io_req) {
+		atomic64_inc(&fnic_stats->io_stats.ioreq_null);
+		fnic_priv(sc)->flags |= FNIC_IO_REQ_NULL;
+		spin_unlock_irqrestore(io_lock, flags);
+		shost_printk(KERN_ERR, fnic->lport->host,
+			  "icmnd_cmpl io_req is null - "
+			  "hdr status = %s tag = 0x%x sc 0x%p\n",
+			  fnic_fcpio_status_to_str(hdr_status), id, sc);
+		return;
+	}
+	start_time = io_req->start_time;
+
+	/* firmware completed the io */
+	io_req->io_completed = 1;
+
+	/*
+	 *  if SCSI-ML has already issued abort on this command,
+	 *  set completion of the IO. The abts path will clean it up
+	 */
+	if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
+
+		/*
+		 * set the FNIC_IO_DONE so that this doesn't get
+		 * flagged as 'out of order' if it was not aborted
+		 */
+		fnic_priv(sc)->flags |= FNIC_IO_DONE;
+		fnic_priv(sc)->flags |= FNIC_IO_ABTS_PENDING;
+		spin_unlock_irqrestore(io_lock, flags);
+		if(FCPIO_ABORTED == hdr_status)
+			fnic_priv(sc)->flags |= FNIC_IO_ABORTED;
+
+		FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+			"icmnd_cmpl abts pending "
+			  "hdr status = %s tag = 0x%x sc = 0x%p "
+			  "scsi_status = %x residual = %d\n",
+			  fnic_fcpio_status_to_str(hdr_status),
+			  id, sc,
+			  icmnd_cmpl->scsi_status,
+			  icmnd_cmpl->residual);
+		return;
+	}
+
+	/* Mark the IO as complete */
+	fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE;
+
+	icmnd_cmpl = &desc->u.icmnd_cmpl;
+
+	switch (hdr_status) {
+	case FCPIO_SUCCESS:
+		sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
+		xfer_len = scsi_bufflen(sc);
+
+		if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) {
+			xfer_len -= icmnd_cmpl->residual;
+			scsi_set_resid(sc, icmnd_cmpl->residual);
+		}
+
+		if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION)
+			atomic64_inc(&fnic_stats->misc_stats.check_condition);
+
+		if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
+			atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
+		break;
+
+	case FCPIO_TIMEOUT:          /* request was timed out */
+		atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
+		sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
+		break;
+
+	case FCPIO_ABORTED:          /* request was aborted */
+		atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
+		sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+		break;
+
+	case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
+		atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
+		scsi_set_resid(sc, icmnd_cmpl->residual);
+		sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+		break;
+
+	case FCPIO_OUT_OF_RESOURCE:  /* out of resources to complete request */
+		atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
+		sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
+		break;
+
+	case FCPIO_IO_NOT_FOUND:     /* requested I/O was not found */
+		atomic64_inc(&fnic_stats->io_stats.io_not_found);
+		sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+		break;
+
+	case FCPIO_SGL_INVALID:      /* request was aborted due to sgl error */
+		atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
+		sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+		break;
+
+	case FCPIO_FW_ERR:           /* request was terminated due fw error */
+		atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
+		sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+		break;
+
+	case FCPIO_MSS_INVALID:      /* request was aborted due to mss error */
+		atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
+		sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+		break;
+
+	case FCPIO_INVALID_HEADER:   /* header contains invalid data */
+	case FCPIO_INVALID_PARAM:    /* some parameter in request invalid */
+	case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
+	default:
+		sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+		break;
+	}
+
+	/* Break link with the SCSI command */
+	fnic_priv(sc)->io_req = NULL;
+	fnic_priv(sc)->flags |= FNIC_IO_DONE;
+
+	if (hdr_status != FCPIO_SUCCESS) {
+		atomic64_inc(&fnic_stats->io_stats.io_failures);
+		shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
+			     fnic_fcpio_status_to_str(hdr_status));
+	}
+
+	fnic_release_ioreq_buf(fnic, io_req, sc);
+
+	cmd_trace = ((u64)hdr_status << 56) |
+		  (u64)icmnd_cmpl->scsi_status << 48 |
+		  (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
+		  (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
+		  (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
+
+	FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
+		  sc->device->host->host_no, id, sc,
+		  ((u64)icmnd_cmpl->_resvd0[1] << 56 |
+		  (u64)icmnd_cmpl->_resvd0[0] << 48 |
+		  jiffies_to_msecs(jiffies - start_time)),
+		  desc, cmd_trace, fnic_flags_and_state(sc));
+
+	if (sc->sc_data_direction == DMA_FROM_DEVICE) {
+		fnic->lport->host_stats.fcp_input_requests++;
+		fnic->fcp_input_bytes += xfer_len;
+	} else if (sc->sc_data_direction == DMA_TO_DEVICE) {
+		fnic->lport->host_stats.fcp_output_requests++;
+		fnic->fcp_output_bytes += xfer_len;
+	} else
+		fnic->lport->host_stats.fcp_control_requests++;
+
+	/* Call SCSI completion function to complete the IO */
+	scsi_done(sc);
+	spin_unlock_irqrestore(io_lock, flags);
+
+	mempool_free(io_req, fnic->io_req_pool);
+
+	atomic64_dec(&fnic_stats->io_stats.active_ios);
+	if (atomic64_read(&fnic->io_cmpl_skip))
+		atomic64_dec(&fnic->io_cmpl_skip);
+	else
+		atomic64_inc(&fnic_stats->io_stats.io_completions);
+
+
+	io_duration_time = jiffies_to_msecs(jiffies) -
+						jiffies_to_msecs(start_time);
+
+	if(io_duration_time <= 10)
+		atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec);
+	else if(io_duration_time <= 100)
+		atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec);
+	else if(io_duration_time <= 500)
+		atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec);
+	else if(io_duration_time <= 5000)
+		atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec);
+	else if(io_duration_time <= 10000)
+		atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec);
+	else if(io_duration_time <= 30000)
+		atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec);
+	else {
+		atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec);
+
+		if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time))
+			atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time);
+	}
+}
+
+/* fnic_fcpio_itmf_cmpl_handler
+ * Routine to handle itmf completions
+ */
+static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
+					struct fcpio_fw_req *desc)
+{
+	u8 type;
+	u8 hdr_status;
+	struct fcpio_tag ftag;
+	u32 id;
+	struct scsi_cmnd *sc = NULL;
+	struct fnic_io_req *io_req;
+	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
+	struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
+	struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
+	struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
+	unsigned long flags;
+	spinlock_t *io_lock;
+	unsigned long start_time;
+	unsigned int tag;
+
+	fcpio_header_dec(&desc->hdr, &type, &hdr_status, &ftag);
+	fcpio_tag_id_dec(&ftag, &id);
+
+	tag = id & FNIC_TAG_MASK;
+	if (tag == fnic->fnic_max_tag_id) {
+		if (!(id & FNIC_TAG_DEV_RST)) {
+			shost_printk(KERN_ERR, fnic->lport->host,
+						"Tag out of range id 0x%x hdr status = %s\n",
+						id, fnic_fcpio_status_to_str(hdr_status));
+			return;
+		}
+	} else if (tag > fnic->fnic_max_tag_id) {
+		shost_printk(KERN_ERR, fnic->lport->host,
+					"Tag out of range tag 0x%x hdr status = %s\n",
+					tag, fnic_fcpio_status_to_str(hdr_status));
+		return;
+	}
+
+	if ((tag == fnic->fnic_max_tag_id) && (id & FNIC_TAG_DEV_RST)) {
+		sc = fnic->sgreset_sc;
+		io_lock = &fnic->sgreset_lock;
+	} else {
+		sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
+		io_lock = fnic_io_lock_hash(fnic, sc);
+	}
+
+	WARN_ON_ONCE(!sc);
+	if (!sc) {
+		atomic64_inc(&fnic_stats->io_stats.sc_null);
+		shost_printk(KERN_ERR, fnic->lport->host,
+			  "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
+			  fnic_fcpio_status_to_str(hdr_status), tag);
+		return;
+	}
+
+	spin_lock_irqsave(io_lock, flags);
+	io_req = fnic_priv(sc)->io_req;
+	WARN_ON_ONCE(!io_req);
+	if (!io_req) {
+		atomic64_inc(&fnic_stats->io_stats.ioreq_null);
+		spin_unlock_irqrestore(io_lock, flags);
+		fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;
+		shost_printk(KERN_ERR, fnic->lport->host,
+			  "itmf_cmpl io_req is null - "
+			  "hdr status = %s tag = 0x%x sc 0x%p\n",
+			  fnic_fcpio_status_to_str(hdr_status), tag, sc);
+		return;
+	}
+	start_time = io_req->start_time;
+
+	if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
+		/* Abort and terminate completion of device reset req */
+		/* REVISIT : Add asserts about various flags */
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "dev reset abts cmpl recd. id %x status %s\n",
+			      id, fnic_fcpio_status_to_str(hdr_status));
+		fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE;
+		fnic_priv(sc)->abts_status = hdr_status;
+		fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE;
+		if (io_req->abts_done)
+			complete(io_req->abts_done);
+		spin_unlock_irqrestore(io_lock, flags);
+	} else if (id & FNIC_TAG_ABORT) {
+		/* Completion of abort cmd */
+		switch (hdr_status) {
+		case FCPIO_SUCCESS:
+			break;
+		case FCPIO_TIMEOUT:
+			if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED)
+				atomic64_inc(&abts_stats->abort_fw_timeouts);
+			else
+				atomic64_inc(
+					&term_stats->terminate_fw_timeouts);
+			break;
+		case FCPIO_ITMF_REJECTED:
+			FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+				"abort reject recd. id %d\n",
+				(int)(id & FNIC_TAG_MASK));
+			break;
+		case FCPIO_IO_NOT_FOUND:
+			if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED)
+				atomic64_inc(&abts_stats->abort_io_not_found);
+			else
+				atomic64_inc(
+					&term_stats->terminate_io_not_found);
+			break;
+		default:
+			if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED)
+				atomic64_inc(&abts_stats->abort_failures);
+			else
+				atomic64_inc(
+					&term_stats->terminate_failures);
+			break;
+		}
+		if (fnic_priv(sc)->state != FNIC_IOREQ_ABTS_PENDING) {
+			/* This is a late completion. Ignore it */
+			spin_unlock_irqrestore(io_lock, flags);
+			return;
+		}
+
+		fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE;
+		fnic_priv(sc)->abts_status = hdr_status;
+
+		/* If the status is IO not found consider it as success */
+		if (hdr_status == FCPIO_IO_NOT_FOUND)
+			fnic_priv(sc)->abts_status = FCPIO_SUCCESS;
+
+		if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
+			atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
+
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "abts cmpl recd. id %d status %s\n",
+			      (int)(id & FNIC_TAG_MASK),
+			      fnic_fcpio_status_to_str(hdr_status));
+
+		/*
+		 * If scsi_eh thread is blocked waiting for abts to complete,
+		 * signal completion to it. IO will be cleaned in the thread
+		 * else clean it in this context
+		 */
+		if (io_req->abts_done) {
+			complete(io_req->abts_done);
+			spin_unlock_irqrestore(io_lock, flags);
+		} else {
+			FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+				      "abts cmpl, completing IO\n");
+			fnic_priv(sc)->io_req = NULL;
+			sc->result = (DID_ERROR << 16);
+
+			spin_unlock_irqrestore(io_lock, flags);
+
+			fnic_release_ioreq_buf(fnic, io_req, sc);
+			mempool_free(io_req, fnic->io_req_pool);
+			FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
+				   sc->device->host->host_no, id,
+				   sc,
+				   jiffies_to_msecs(jiffies - start_time),
+				   desc,
+				   (((u64)hdr_status << 40) |
+				    (u64)sc->cmnd[0] << 32 |
+				    (u64)sc->cmnd[2] << 24 |
+				    (u64)sc->cmnd[3] << 16 |
+				    (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
+				   fnic_flags_and_state(sc));
+			scsi_done(sc);
+			atomic64_dec(&fnic_stats->io_stats.active_ios);
+			if (atomic64_read(&fnic->io_cmpl_skip))
+				atomic64_dec(&fnic->io_cmpl_skip);
+			else
+				atomic64_inc(&fnic_stats->io_stats.io_completions);
+		}
+	} else if (id & FNIC_TAG_DEV_RST) {
+		/* Completion of device reset */
+		fnic_priv(sc)->lr_status = hdr_status;
+		if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
+			spin_unlock_irqrestore(io_lock, flags);
+			fnic_priv(sc)->flags |= FNIC_DEV_RST_ABTS_PENDING;
+			FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
+				  sc->device->host->host_no, id, sc,
+				  jiffies_to_msecs(jiffies - start_time),
+				  desc, 0, fnic_flags_and_state(sc));
+			FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+				"Terminate pending "
+				"dev reset cmpl recd. id %d status %s\n",
+				(int)(id & FNIC_TAG_MASK),
+				fnic_fcpio_status_to_str(hdr_status));
+			return;
+		}
+		if (fnic_priv(sc)->flags & FNIC_DEV_RST_TIMED_OUT) {
+			/* Need to wait for terminate completion */
+			spin_unlock_irqrestore(io_lock, flags);
+			FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
+				  sc->device->host->host_no, id, sc,
+				  jiffies_to_msecs(jiffies - start_time),
+				  desc, 0, fnic_flags_and_state(sc));
+			FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+				"dev reset cmpl recd after time out. "
+				"id %d status %s\n",
+				(int)(id & FNIC_TAG_MASK),
+				fnic_fcpio_status_to_str(hdr_status));
+			return;
+		}
+		fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE;
+		fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE;
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "dev reset cmpl recd. id %d status %s\n",
+			      (int)(id & FNIC_TAG_MASK),
+			      fnic_fcpio_status_to_str(hdr_status));
+		if (io_req->dr_done)
+			complete(io_req->dr_done);
+		spin_unlock_irqrestore(io_lock, flags);
+
+	} else {
+		shost_printk(KERN_ERR, fnic->lport->host,
+			     "Unexpected itmf io state %s tag %x\n",
+			     fnic_ioreq_state_to_str(fnic_priv(sc)->state), id);
+		spin_unlock_irqrestore(io_lock, flags);
+	}
+
+}
+
+/*
+ * fnic_fcpio_cmpl_handler
+ * Routine to service the cq for wq_copy
+ */
+static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
+				   unsigned int cq_index,
+				   struct fcpio_fw_req *desc)
+{
+	struct fnic *fnic = vnic_dev_priv(vdev);
+
+	switch (desc->hdr.type) {
+	case FCPIO_ICMND_CMPL: /* fw completed a command */
+	case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
+	case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
+	case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
+	case FCPIO_RESET_CMPL: /* fw completed reset */
+		atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
+		break;
+	default:
+		break;
+	}
+
+	switch (desc->hdr.type) {
+	case FCPIO_ACK: /* fw copied copy wq desc to its queue */
+		fnic_fcpio_ack_handler(fnic, cq_index, desc);
+		break;
+
+	case FCPIO_ICMND_CMPL: /* fw completed a command */
+		fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
+		break;
+
+	case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
+		fnic_fcpio_itmf_cmpl_handler(fnic, desc);
+		break;
+
+	case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
+	case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
+		fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
+		break;
+
+	case FCPIO_RESET_CMPL: /* fw completed reset */
+		fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
+		break;
+
+	default:
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "firmware completion type %d\n",
+			      desc->hdr.type);
+		break;
+	}
+
+	return 0;
+}
+
+/*
+ * fnic_wq_copy_cmpl_handler
+ * Routine to process wq copy
+ */
+int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
+{
+	unsigned int wq_work_done = 0;
+	unsigned int i, cq_index;
+	unsigned int cur_work_done;
+	struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
+	u64 start_jiffies = 0;
+	u64 end_jiffies = 0;
+	u64 delta_jiffies = 0;
+	u64 delta_ms = 0;
+
+	for (i = 0; i < fnic->wq_copy_count; i++) {
+		cq_index = i + fnic->raw_wq_count + fnic->rq_count;
+
+		start_jiffies = jiffies;
+		cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
+						     fnic_fcpio_cmpl_handler,
+						     copy_work_to_do);
+		end_jiffies = jiffies;
+
+		wq_work_done += cur_work_done;
+		delta_jiffies = end_jiffies - start_jiffies;
+		if (delta_jiffies >
+			(u64) atomic64_read(&misc_stats->max_isr_jiffies)) {
+			atomic64_set(&misc_stats->max_isr_jiffies,
+					delta_jiffies);
+			delta_ms = jiffies_to_msecs(delta_jiffies);
+			atomic64_set(&misc_stats->max_isr_time_ms, delta_ms);
+			atomic64_set(&misc_stats->corr_work_done,
+					cur_work_done);
+		}
+	}
+	return wq_work_done;
+}
+
+static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data)
+{
+	const int tag = scsi_cmd_to_rq(sc)->tag;
+	struct fnic *fnic = data;
+	struct fnic_io_req *io_req;
+	unsigned long flags = 0;
+	spinlock_t *io_lock;
+	unsigned long start_time = 0;
+	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
+
+	io_lock = fnic_io_lock_tag(fnic, tag);
+	spin_lock_irqsave(io_lock, flags);
+
+	io_req = fnic_priv(sc)->io_req;
+	if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) &&
+	    !(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) {
+		/*
+		 * We will be here only when FW completes reset
+		 * without sending completions for outstanding ios.
+		 */
+		fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE;
+		if (io_req && io_req->dr_done)
+			complete(io_req->dr_done);
+		else if (io_req && io_req->abts_done)
+			complete(io_req->abts_done);
+		spin_unlock_irqrestore(io_lock, flags);
+		return true;
+	} else if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) {
+		spin_unlock_irqrestore(io_lock, flags);
+		return true;
+	}
+	if (!io_req) {
+		spin_unlock_irqrestore(io_lock, flags);
+		goto cleanup_scsi_cmd;
+	}
+
+	fnic_priv(sc)->io_req = NULL;
+
+	spin_unlock_irqrestore(io_lock, flags);
+
+	/*
+	 * If there is a scsi_cmnd associated with this io_req, then
+	 * free the corresponding state
+	 */
+	start_time = io_req->start_time;
+	fnic_release_ioreq_buf(fnic, io_req, sc);
+	mempool_free(io_req, fnic->io_req_pool);
+
+cleanup_scsi_cmd:
+	sc->result = DID_TRANSPORT_DISRUPTED << 16;
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "fnic_cleanup_io: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",
+		      tag, sc, jiffies - start_time);
+
+	if (atomic64_read(&fnic->io_cmpl_skip))
+		atomic64_dec(&fnic->io_cmpl_skip);
+	else
+		atomic64_inc(&fnic_stats->io_stats.io_completions);
+
+	/* Complete the command to SCSI */
+	if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED))
+		shost_printk(KERN_ERR, fnic->lport->host,
+			     "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n",
+			     tag, sc);
+
+	FNIC_TRACE(fnic_cleanup_io,
+		   sc->device->host->host_no, tag, sc,
+		   jiffies_to_msecs(jiffies - start_time),
+		   0, ((u64)sc->cmnd[0] << 32 |
+		       (u64)sc->cmnd[2] << 24 |
+		       (u64)sc->cmnd[3] << 16 |
+		       (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
+		   fnic_flags_and_state(sc));
+
+	scsi_done(sc);
+
+	return true;
+}
+
+static void fnic_cleanup_io(struct fnic *fnic)
+{
+	scsi_host_busy_iter(fnic->lport->host,
+			    fnic_cleanup_io_iter, fnic);
+}
+
+void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
+				  struct fcpio_host_req *desc)
+{
+	u32 id;
+	struct fnic *fnic = vnic_dev_priv(wq->vdev);
+	struct fnic_io_req *io_req;
+	struct scsi_cmnd *sc;
+	unsigned long flags;
+	spinlock_t *io_lock;
+	unsigned long start_time = 0;
+
+	/* get the tag reference */
+	fcpio_tag_id_dec(&desc->hdr.tag, &id);
+	id &= FNIC_TAG_MASK;
+
+	if (id >= fnic->fnic_max_tag_id)
+		return;
+
+	sc = scsi_host_find_tag(fnic->lport->host, id);
+	if (!sc)
+		return;
+
+	io_lock = fnic_io_lock_hash(fnic, sc);
+	spin_lock_irqsave(io_lock, flags);
+
+	/* Get the IO context which this desc refers to */
+	io_req = fnic_priv(sc)->io_req;
+
+	/* fnic interrupts are turned off by now */
+
+	if (!io_req) {
+		spin_unlock_irqrestore(io_lock, flags);
+		goto wq_copy_cleanup_scsi_cmd;
+	}
+
+	fnic_priv(sc)->io_req = NULL;
+
+	spin_unlock_irqrestore(io_lock, flags);
+
+	start_time = io_req->start_time;
+	fnic_release_ioreq_buf(fnic, io_req, sc);
+	mempool_free(io_req, fnic->io_req_pool);
+
+wq_copy_cleanup_scsi_cmd:
+	sc->result = DID_NO_CONNECT << 16;
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
+		      " DID_NO_CONNECT\n");
+
+	FNIC_TRACE(fnic_wq_copy_cleanup_handler,
+		   sc->device->host->host_no, id, sc,
+		   jiffies_to_msecs(jiffies - start_time),
+		   0, ((u64)sc->cmnd[0] << 32 |
+		       (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
+		       (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
+		   fnic_flags_and_state(sc));
+
+	scsi_done(sc);
+}
+
+static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
+					  u32 task_req, u8 *fc_lun,
+					  struct fnic_io_req *io_req)
+{
+	struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+	struct Scsi_Host *host = fnic->lport->host;
+	struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
+	unsigned long flags;
+
+	spin_lock_irqsave(host->host_lock, flags);
+	if (unlikely(fnic_chk_state_flags_locked(fnic,
+						FNIC_FLAGS_IO_BLOCKED))) {
+		spin_unlock_irqrestore(host->host_lock, flags);
+		return 1;
+	} else
+		atomic_inc(&fnic->in_flight);
+	spin_unlock_irqrestore(host->host_lock, flags);
+
+	spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+	if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+		free_wq_copy_descs(fnic, wq);
+
+	if (!vnic_wq_copy_desc_avail(wq)) {
+		spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+		atomic_dec(&fnic->in_flight);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			"fnic_queue_abort_io_req: failure: no descriptors\n");
+		atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
+		return 1;
+	}
+	fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
+				     0, task_req, tag, fc_lun, io_req->port_id,
+				     fnic->config.ra_tov, fnic->config.ed_tov);
+
+	atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
+	if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
+		  atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
+		atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
+		  atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
+
+	spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+	atomic_dec(&fnic->in_flight);
+
+	return 0;
+}
+
+struct fnic_rport_abort_io_iter_data {
+	struct fnic *fnic;
+	u32 port_id;
+	int term_cnt;
+};
+
+static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data)
+{
+	struct fnic_rport_abort_io_iter_data *iter_data = data;
+	struct fnic *fnic = iter_data->fnic;
+	int abt_tag = scsi_cmd_to_rq(sc)->tag;
+	struct fnic_io_req *io_req;
+	spinlock_t *io_lock;
+	unsigned long flags;
+	struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
+	struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
+	struct scsi_lun fc_lun;
+	enum fnic_ioreq_state old_ioreq_state;
+
+	io_lock = fnic_io_lock_tag(fnic, abt_tag);
+	spin_lock_irqsave(io_lock, flags);
+
+	io_req = fnic_priv(sc)->io_req;
+
+	if (!io_req || io_req->port_id != iter_data->port_id) {
+		spin_unlock_irqrestore(io_lock, flags);
+		return true;
+	}
+
+	if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) &&
+	    !(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED)) {
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			"fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
+			sc);
+		spin_unlock_irqrestore(io_lock, flags);
+		return true;
+	}
+
+	/*
+	 * Found IO that is still pending with firmware and
+	 * belongs to rport that went away
+	 */
+	if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
+		spin_unlock_irqrestore(io_lock, flags);
+		return true;
+	}
+	if (io_req->abts_done) {
+		shost_printk(KERN_ERR, fnic->lport->host,
+			"fnic_rport_exch_reset: io_req->abts_done is set "
+			"state is %s\n",
+			fnic_ioreq_state_to_str(fnic_priv(sc)->state));
+	}
+
+	if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED)) {
+		shost_printk(KERN_ERR, fnic->lport->host,
+			     "rport_exch_reset "
+			     "IO not yet issued %p tag 0x%x flags "
+			     "%x state %d\n",
+			     sc, abt_tag, fnic_priv(sc)->flags, fnic_priv(sc)->state);
+	}
+	old_ioreq_state = fnic_priv(sc)->state;
+	fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;
+	fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE;
+	if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) {
+		atomic64_inc(&reset_stats->device_reset_terminates);
+		abt_tag |= FNIC_TAG_DEV_RST;
+	}
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "fnic_rport_exch_reset dev rst sc 0x%p\n", sc);
+	BUG_ON(io_req->abts_done);
+
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "fnic_rport_reset_exch: Issuing abts\n");
+
+	spin_unlock_irqrestore(io_lock, flags);
+
+	/* Now queue the abort command to firmware */
+	int_to_scsilun(sc->device->lun, &fc_lun);
+
+	if (fnic_queue_abort_io_req(fnic, abt_tag,
+				    FCPIO_ITMF_ABT_TASK_TERM,
+				    fc_lun.scsi_lun, io_req)) {
+		/*
+		 * Revert the cmd state back to old state, if
+		 * it hasn't changed in between. This cmd will get
+		 * aborted later by scsi_eh, or cleaned up during
+		 * lun reset
+		 */
+		spin_lock_irqsave(io_lock, flags);
+		if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING)
+			fnic_priv(sc)->state = old_ioreq_state;
+		spin_unlock_irqrestore(io_lock, flags);
+	} else {
+		spin_lock_irqsave(io_lock, flags);
+		if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET)
+			fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;
+		else
+			fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED;
+		spin_unlock_irqrestore(io_lock, flags);
+		atomic64_inc(&term_stats->terminates);
+		iter_data->term_cnt++;
+	}
+	return true;
+}
+
+static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
+{
+	struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
+	struct fnic_rport_abort_io_iter_data iter_data = {
+		.fnic = fnic,
+		.port_id = port_id,
+		.term_cnt = 0,
+	};
+
+	FNIC_SCSI_DBG(KERN_DEBUG,
+		      fnic->lport->host,
+		      "fnic_rport_exch_reset called portid 0x%06x\n",
+		      port_id);
+
+	if (fnic->in_remove)
+		return;
+
+	scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter,
+			    &iter_data);
+	if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates))
+		atomic64_set(&term_stats->max_terminates, iter_data.term_cnt);
+
+}
+
+void fnic_terminate_rport_io(struct fc_rport *rport)
+{
+	struct fc_rport_libfc_priv *rdata;
+	struct fc_lport *lport;
+	struct fnic *fnic;
+
+	if (!rport) {
+		printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
+		return;
+	}
+	rdata = rport->dd_data;
+
+	if (!rdata) {
+		printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
+		return;
+	}
+	lport = rdata->local_port;
+
+	if (!lport) {
+		printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
+		return;
+	}
+	fnic = lport_priv(lport);
+	FNIC_SCSI_DBG(KERN_DEBUG,
+		      fnic->lport->host, "fnic_terminate_rport_io called"
+		      " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
+		      rport->port_name, rport->node_name, rport,
+		      rport->port_id);
+
+	if (fnic->in_remove)
+		return;
+
+	fnic_rport_exch_reset(fnic, rport->port_id);
+}
+
+/*
+ * This function is exported to SCSI for sending abort cmnds.
+ * A SCSI IO is represented by a io_req in the driver.
+ * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
+ */
+int fnic_abort_cmd(struct scsi_cmnd *sc)
+{
+	struct request *const rq = scsi_cmd_to_rq(sc);
+	struct fc_lport *lp;
+	struct fnic *fnic;
+	struct fnic_io_req *io_req = NULL;
+	struct fc_rport *rport;
+	spinlock_t *io_lock;
+	unsigned long flags;
+	unsigned long start_time = 0;
+	int ret = SUCCESS;
+	u32 task_req = 0;
+	struct scsi_lun fc_lun;
+	struct fnic_stats *fnic_stats;
+	struct abort_stats *abts_stats;
+	struct terminate_stats *term_stats;
+	enum fnic_ioreq_state old_ioreq_state;
+	const int tag = rq->tag;
+	unsigned long abt_issued_time;
+	DECLARE_COMPLETION_ONSTACK(tm_done);
+
+	/* Wait for rport to unblock */
+	fc_block_scsi_eh(sc);
+
+	/* Get local-port, check ready and link up */
+	lp = shost_priv(sc->device->host);
+
+	fnic = lport_priv(lp);
+	fnic_stats = &fnic->fnic_stats;
+	abts_stats = &fnic->fnic_stats.abts_stats;
+	term_stats = &fnic->fnic_stats.term_stats;
+
+	rport = starget_to_rport(scsi_target(sc->device));
+	FNIC_SCSI_DBG(KERN_DEBUG,
+		fnic->lport->host,
+		"Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
+		rport->port_id, sc->device->lun, tag, fnic_priv(sc)->flags);
+
+	fnic_priv(sc)->flags = FNIC_NO_FLAGS;
+
+	if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
+		ret = FAILED;
+		goto fnic_abort_cmd_end;
+	}
+
+	/*
+	 * Avoid a race between SCSI issuing the abort and the device
+	 * completing the command.
+	 *
+	 * If the command is already completed by the fw cmpl code,
+	 * we just return SUCCESS from here. This means that the abort
+	 * succeeded. In the SCSI ML, since the timeout for command has
+	 * happened, the completion wont actually complete the command
+	 * and it will be considered as an aborted command
+	 *
+	 * .io_req will not be cleared except while holding io_req_lock.
+	 */
+	io_lock = fnic_io_lock_hash(fnic, sc);
+	spin_lock_irqsave(io_lock, flags);
+	io_req = fnic_priv(sc)->io_req;
+	if (!io_req) {
+		spin_unlock_irqrestore(io_lock, flags);
+		goto fnic_abort_cmd_end;
+	}
+
+	io_req->abts_done = &tm_done;
+
+	if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
+		spin_unlock_irqrestore(io_lock, flags);
+		goto wait_pending;
+	}
+
+	abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
+	if (abt_issued_time <= 6000)
+		atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec);
+	else if (abt_issued_time > 6000 && abt_issued_time <= 20000)
+		atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec);
+	else if (abt_issued_time > 20000 && abt_issued_time <= 30000)
+		atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec);
+	else if (abt_issued_time > 30000 && abt_issued_time <= 40000)
+		atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec);
+	else if (abt_issued_time > 40000 && abt_issued_time <= 50000)
+		atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec);
+	else if (abt_issued_time > 50000 && abt_issued_time <= 60000)
+		atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec);
+	else
+		atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec);
+
+	FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+		"CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time);
+	/*
+	 * Command is still pending, need to abort it
+	 * If the firmware completes the command after this point,
+	 * the completion wont be done till mid-layer, since abort
+	 * has already started.
+	 */
+	old_ioreq_state = fnic_priv(sc)->state;
+	fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;
+	fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE;
+
+	spin_unlock_irqrestore(io_lock, flags);
+
+	/*
+	 * Check readiness of the remote port. If the path to remote
+	 * port is up, then send abts to the remote port to terminate
+	 * the IO. Else, just locally terminate the IO in the firmware
+	 */
+	if (fc_remote_port_chkready(rport) == 0)
+		task_req = FCPIO_ITMF_ABT_TASK;
+	else {
+		atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
+		task_req = FCPIO_ITMF_ABT_TASK_TERM;
+	}
+
+	/* Now queue the abort command to firmware */
+	int_to_scsilun(sc->device->lun, &fc_lun);
+
+	if (fnic_queue_abort_io_req(fnic, tag, task_req, fc_lun.scsi_lun,
+				    io_req)) {
+		spin_lock_irqsave(io_lock, flags);
+		if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING)
+			fnic_priv(sc)->state = old_ioreq_state;
+		io_req = fnic_priv(sc)->io_req;
+		if (io_req)
+			io_req->abts_done = NULL;
+		spin_unlock_irqrestore(io_lock, flags);
+		ret = FAILED;
+		goto fnic_abort_cmd_end;
+	}
+	if (task_req == FCPIO_ITMF_ABT_TASK) {
+		fnic_priv(sc)->flags |= FNIC_IO_ABTS_ISSUED;
+		atomic64_inc(&fnic_stats->abts_stats.aborts);
+	} else {
+		fnic_priv(sc)->flags |= FNIC_IO_TERM_ISSUED;
+		atomic64_inc(&fnic_stats->term_stats.terminates);
+	}
+
+	/*
+	 * We queued an abort IO, wait for its completion.
+	 * Once the firmware completes the abort command, it will
+	 * wake up this thread.
+	 */
+ wait_pending:
+	wait_for_completion_timeout(&tm_done,
+				    msecs_to_jiffies
+				    (2 * fnic->config.ra_tov +
+				     fnic->config.ed_tov));
+
+	/* Check the abort status */
+	spin_lock_irqsave(io_lock, flags);
+
+	io_req = fnic_priv(sc)->io_req;
+	if (!io_req) {
+		atomic64_inc(&fnic_stats->io_stats.ioreq_null);
+		spin_unlock_irqrestore(io_lock, flags);
+		fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;
+		ret = FAILED;
+		goto fnic_abort_cmd_end;
+	}
+	io_req->abts_done = NULL;
+
+	/* fw did not complete abort, timed out */
+	if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) {
+		spin_unlock_irqrestore(io_lock, flags);
+		if (task_req == FCPIO_ITMF_ABT_TASK) {
+			atomic64_inc(&abts_stats->abort_drv_timeouts);
+		} else {
+			atomic64_inc(&term_stats->terminate_drv_timeouts);
+		}
+		fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_TIMED_OUT;
+		ret = FAILED;
+		goto fnic_abort_cmd_end;
+	}
+
+	/* IO out of order */
+
+	if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
+		spin_unlock_irqrestore(io_lock, flags);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			"Issuing Host reset due to out of order IO\n");
+
+		ret = FAILED;
+		goto fnic_abort_cmd_end;
+	}
+
+	fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE;
+
+	start_time = io_req->start_time;
+	/*
+	 * firmware completed the abort, check the status,
+	 * free the io_req if successful. If abort fails,
+	 * Device reset will clean the I/O.
+	 */
+	if (fnic_priv(sc)->abts_status == FCPIO_SUCCESS) {
+		fnic_priv(sc)->io_req = NULL;
+	} else {
+		ret = FAILED;
+		spin_unlock_irqrestore(io_lock, flags);
+		goto fnic_abort_cmd_end;
+	}
+
+	spin_unlock_irqrestore(io_lock, flags);
+
+	fnic_release_ioreq_buf(fnic, io_req, sc);
+	mempool_free(io_req, fnic->io_req_pool);
+
+	/* Call SCSI completion function to complete the IO */
+	sc->result = DID_ABORT << 16;
+	scsi_done(sc);
+	atomic64_dec(&fnic_stats->io_stats.active_ios);
+	if (atomic64_read(&fnic->io_cmpl_skip))
+		atomic64_dec(&fnic->io_cmpl_skip);
+	else
+		atomic64_inc(&fnic_stats->io_stats.io_completions);
+
+fnic_abort_cmd_end:
+	FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, tag, sc,
+		  jiffies_to_msecs(jiffies - start_time),
+		  0, ((u64)sc->cmnd[0] << 32 |
+		  (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
+		  (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
+		  fnic_flags_and_state(sc));
+
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "Returning from abort cmd type %x %s\n", task_req,
+		      (ret == SUCCESS) ?
+		      "SUCCESS" : "FAILED");
+	return ret;
+}
+
+static inline int fnic_queue_dr_io_req(struct fnic *fnic,
+				       struct scsi_cmnd *sc,
+				       struct fnic_io_req *io_req)
+{
+	struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+	struct Scsi_Host *host = fnic->lport->host;
+	struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
+	struct scsi_lun fc_lun;
+	int ret = 0;
+	unsigned long intr_flags;
+	unsigned int tag = scsi_cmd_to_rq(sc)->tag;
+
+	if (tag == SCSI_NO_TAG)
+		tag = io_req->tag;
+
+	spin_lock_irqsave(host->host_lock, intr_flags);
+	if (unlikely(fnic_chk_state_flags_locked(fnic,
+						FNIC_FLAGS_IO_BLOCKED))) {
+		spin_unlock_irqrestore(host->host_lock, intr_flags);
+		return FAILED;
+	} else
+		atomic_inc(&fnic->in_flight);
+	spin_unlock_irqrestore(host->host_lock, intr_flags);
+
+	spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
+
+	if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+		free_wq_copy_descs(fnic, wq);
+
+	if (!vnic_wq_copy_desc_avail(wq)) {
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			  "queue_dr_io_req failure - no descriptors\n");
+		atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
+		ret = -EAGAIN;
+		goto lr_io_req_end;
+	}
+
+	/* fill in the lun info */
+	int_to_scsilun(sc->device->lun, &fc_lun);
+
+	tag |= FNIC_TAG_DEV_RST;
+	fnic_queue_wq_copy_desc_itmf(wq, tag,
+				     0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
+				     fc_lun.scsi_lun, io_req->port_id,
+				     fnic->config.ra_tov, fnic->config.ed_tov);
+
+	atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
+	if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
+		  atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
+		atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
+		  atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
+
+lr_io_req_end:
+	spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+	atomic_dec(&fnic->in_flight);
+
+	return ret;
+}
+
+struct fnic_pending_aborts_iter_data {
+	struct fnic *fnic;
+	struct scsi_cmnd *lr_sc;
+	struct scsi_device *lun_dev;
+	int ret;
+};
+
+static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, void *data)
+{
+	struct fnic_pending_aborts_iter_data *iter_data = data;
+	struct fnic *fnic = iter_data->fnic;
+	struct scsi_device *lun_dev = iter_data->lun_dev;
+	int abt_tag = scsi_cmd_to_rq(sc)->tag;
+	struct fnic_io_req *io_req;
+	spinlock_t *io_lock;
+	unsigned long flags;
+	struct scsi_lun fc_lun;
+	DECLARE_COMPLETION_ONSTACK(tm_done);
+	enum fnic_ioreq_state old_ioreq_state;
+
+	if (sc == iter_data->lr_sc || sc->device != lun_dev)
+		return true;
+
+	io_lock = fnic_io_lock_tag(fnic, abt_tag);
+	spin_lock_irqsave(io_lock, flags);
+	io_req = fnic_priv(sc)->io_req;
+	if (!io_req) {
+		spin_unlock_irqrestore(io_lock, flags);
+		return true;
+	}
+
+	/*
+	 * Found IO that is still pending with firmware and
+	 * belongs to the LUN that we are resetting
+	 */
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "Found IO in %s on lun\n",
+		      fnic_ioreq_state_to_str(fnic_priv(sc)->state));
+
+	if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
+		spin_unlock_irqrestore(io_lock, flags);
+		return true;
+	}
+	if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) &&
+	    (!(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED))) {
+		FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+			      "%s dev rst not pending sc 0x%p\n", __func__,
+			      sc);
+		spin_unlock_irqrestore(io_lock, flags);
+		return true;
+	}
+
+	if (io_req->abts_done)
+		shost_printk(KERN_ERR, fnic->lport->host,
+			     "%s: io_req->abts_done is set state is %s\n",
+			     __func__, fnic_ioreq_state_to_str(fnic_priv(sc)->state));
+	old_ioreq_state = fnic_priv(sc)->state;
+	/*
+	 * Any pending IO issued prior to reset is expected to be
+	 * in abts pending state, if not we need to set
+	 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
+	 * When IO is completed, the IO will be handed over and
+	 * handled in this function.
+	 */
+	fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;
+
+	BUG_ON(io_req->abts_done);
+
+	if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) {
+		abt_tag |= FNIC_TAG_DEV_RST;
+		FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+			      "%s: dev rst sc 0x%p\n", __func__, sc);
+	}
+
+	fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE;
+	io_req->abts_done = &tm_done;
+	spin_unlock_irqrestore(io_lock, flags);
+
+	/* Now queue the abort command to firmware */
+	int_to_scsilun(sc->device->lun, &fc_lun);
+
+	if (fnic_queue_abort_io_req(fnic, abt_tag,
+				    FCPIO_ITMF_ABT_TASK_TERM,
+				    fc_lun.scsi_lun, io_req)) {
+		spin_lock_irqsave(io_lock, flags);
+		io_req = fnic_priv(sc)->io_req;
+		if (io_req)
+			io_req->abts_done = NULL;
+		if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING)
+			fnic_priv(sc)->state = old_ioreq_state;
+		spin_unlock_irqrestore(io_lock, flags);
+		iter_data->ret = FAILED;
+		return false;
+	} else {
+		spin_lock_irqsave(io_lock, flags);
+		if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET)
+			fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;
+		spin_unlock_irqrestore(io_lock, flags);
+	}
+	fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED;
+
+	wait_for_completion_timeout(&tm_done, msecs_to_jiffies
+				    (fnic->config.ed_tov));
+
+	/* Recheck cmd state to check if it is now aborted */
+	spin_lock_irqsave(io_lock, flags);
+	io_req = fnic_priv(sc)->io_req;
+	if (!io_req) {
+		spin_unlock_irqrestore(io_lock, flags);
+		fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;
+		return true;
+	}
+
+	io_req->abts_done = NULL;
+
+	/* if abort is still pending with fw, fail */
+	if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) {
+		spin_unlock_irqrestore(io_lock, flags);
+		fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE;
+		iter_data->ret = FAILED;
+		return false;
+	}
+	fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE;
+
+	/* original sc used for lr is handled by dev reset code */
+	if (sc != iter_data->lr_sc)
+		fnic_priv(sc)->io_req = NULL;
+	spin_unlock_irqrestore(io_lock, flags);
+
+	/* original sc used for lr is handled by dev reset code */
+	if (sc != iter_data->lr_sc) {
+		fnic_release_ioreq_buf(fnic, io_req, sc);
+		mempool_free(io_req, fnic->io_req_pool);
+	}
+
+	/*
+	 * Any IO is returned during reset, it needs to call scsi_done
+	 * to return the scsi_cmnd to upper layer.
+	 */
+	/* Set result to let upper SCSI layer retry */
+	sc->result = DID_RESET << 16;
+	scsi_done(sc);
+
+	return true;
+}
+
+/*
+ * Clean up any pending aborts on the lun
+ * For each outstanding IO on this lun, whose abort is not completed by fw,
+ * issue a local abort. Wait for abort to complete. Return 0 if all commands
+ * successfully aborted, 1 otherwise
+ */
+static int fnic_clean_pending_aborts(struct fnic *fnic,
+				     struct scsi_cmnd *lr_sc,
+				     bool new_sc)
+
+{
+	int ret = 0;
+	struct fnic_pending_aborts_iter_data iter_data = {
+		.fnic = fnic,
+		.lun_dev = lr_sc->device,
+		.ret = SUCCESS,
+	};
+
+	iter_data.lr_sc = lr_sc;
+
+	scsi_host_busy_iter(fnic->lport->host,
+			    fnic_pending_aborts_iter, &iter_data);
+	if (iter_data.ret == FAILED) {
+		ret = iter_data.ret;
+		goto clean_pending_aborts_end;
+	}
+	schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
+
+	/* walk again to check, if IOs are still pending in fw */
+	if (fnic_is_abts_pending(fnic, lr_sc))
+		ret = 1;
+
+clean_pending_aborts_end:
+	FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+			"%s: exit status: %d\n", __func__, ret);
+	return ret;
+}
+
+/*
+ * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
+ * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
+ * on the LUN.
+ */
+int fnic_device_reset(struct scsi_cmnd *sc)
+{
+	struct request *rq = scsi_cmd_to_rq(sc);
+	struct fc_lport *lp;
+	struct fnic *fnic;
+	struct fnic_io_req *io_req = NULL;
+	struct fc_rport *rport;
+	int status;
+	int ret = FAILED;
+	spinlock_t *io_lock;
+	unsigned long flags;
+	unsigned long start_time = 0;
+	struct scsi_lun fc_lun;
+	struct fnic_stats *fnic_stats;
+	struct reset_stats *reset_stats;
+	int tag = rq->tag;
+	DECLARE_COMPLETION_ONSTACK(tm_done);
+	bool new_sc = 0;
+
+	/* Wait for rport to unblock */
+	fc_block_scsi_eh(sc);
+
+	/* Get local-port, check ready and link up */
+	lp = shost_priv(sc->device->host);
+
+	fnic = lport_priv(lp);
+	fnic_stats = &fnic->fnic_stats;
+	reset_stats = &fnic->fnic_stats.reset_stats;
+
+	atomic64_inc(&reset_stats->device_resets);
+
+	rport = starget_to_rport(scsi_target(sc->device));
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
+		      rport->port_id, sc->device->lun, sc);
+
+	if (lp->state != LPORT_ST_READY || !(lp->link_up))
+		goto fnic_device_reset_end;
+
+	/* Check if remote port up */
+	if (fc_remote_port_chkready(rport)) {
+		atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
+		goto fnic_device_reset_end;
+	}
+
+	fnic_priv(sc)->flags = FNIC_DEVICE_RESET;
+
+	if (unlikely(tag < 0)) {
+		/*
+		 * For device reset issued through sg3utils, we let
+		 * only one LUN_RESET to go through and use a special
+		 * tag equal to max_tag_id so that we don't have to allocate
+		 * or free it. It won't interact with tags
+		 * allocated by mid layer.
+		 */
+		mutex_lock(&fnic->sgreset_mutex);
+		tag = fnic->fnic_max_tag_id;
+		new_sc = 1;
+		fnic->sgreset_sc = sc;
+		io_lock = &fnic->sgreset_lock;
+		FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+			"fcid: 0x%x lun: 0x%llx flags: 0x%x tag: 0x%x Issuing sgreset\n",
+			rport->port_id, sc->device->lun, fnic_priv(sc)->flags, tag);
+	} else
+		io_lock = fnic_io_lock_hash(fnic, sc);
+
+	spin_lock_irqsave(io_lock, flags);
+	io_req = fnic_priv(sc)->io_req;
+
+	/*
+	 * If there is a io_req attached to this command, then use it,
+	 * else allocate a new one.
+	 */
+	if (!io_req) {
+		io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
+		if (!io_req) {
+			spin_unlock_irqrestore(io_lock, flags);
+			goto fnic_device_reset_end;
+		}
+		memset(io_req, 0, sizeof(*io_req));
+		io_req->port_id = rport->port_id;
+		io_req->tag = tag;
+		io_req->sc = sc;
+		fnic_priv(sc)->io_req = io_req;
+	}
+	io_req->dr_done = &tm_done;
+	fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING;
+	fnic_priv(sc)->lr_status = FCPIO_INVALID_CODE;
+	spin_unlock_irqrestore(io_lock, flags);
+
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
+
+	/*
+	 * issue the device reset, if enqueue failed, clean up the ioreq
+	 * and break assoc with scsi cmd
+	 */
+	if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
+		spin_lock_irqsave(io_lock, flags);
+		io_req = fnic_priv(sc)->io_req;
+		if (io_req)
+			io_req->dr_done = NULL;
+		goto fnic_device_reset_clean;
+	}
+	spin_lock_irqsave(io_lock, flags);
+	fnic_priv(sc)->flags |= FNIC_DEV_RST_ISSUED;
+	spin_unlock_irqrestore(io_lock, flags);
+
+	/*
+	 * Wait on the local completion for LUN reset.  The io_req may be
+	 * freed while we wait since we hold no lock.
+	 */
+	wait_for_completion_timeout(&tm_done,
+				    msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
+
+	spin_lock_irqsave(io_lock, flags);
+	io_req = fnic_priv(sc)->io_req;
+	if (!io_req) {
+		spin_unlock_irqrestore(io_lock, flags);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+				"io_req is null tag 0x%x sc 0x%p\n", tag, sc);
+		goto fnic_device_reset_end;
+	}
+	io_req->dr_done = NULL;
+
+	status = fnic_priv(sc)->lr_status;
+
+	/*
+	 * If lun reset not completed, bail out with failed. io_req
+	 * gets cleaned up during higher levels of EH
+	 */
+	if (status == FCPIO_INVALID_CODE) {
+		atomic64_inc(&reset_stats->device_reset_timeouts);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "Device reset timed out\n");
+		fnic_priv(sc)->flags |= FNIC_DEV_RST_TIMED_OUT;
+		spin_unlock_irqrestore(io_lock, flags);
+		int_to_scsilun(sc->device->lun, &fc_lun);
+		/*
+		 * Issue abort and terminate on device reset request.
+		 * If q'ing of terminate fails, retry it after a delay.
+		 */
+		while (1) {
+			spin_lock_irqsave(io_lock, flags);
+			if (fnic_priv(sc)->flags & FNIC_DEV_RST_TERM_ISSUED) {
+				spin_unlock_irqrestore(io_lock, flags);
+				break;
+			}
+			spin_unlock_irqrestore(io_lock, flags);
+			if (fnic_queue_abort_io_req(fnic,
+				tag | FNIC_TAG_DEV_RST,
+				FCPIO_ITMF_ABT_TASK_TERM,
+				fc_lun.scsi_lun, io_req)) {
+				wait_for_completion_timeout(&tm_done,
+				msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
+			} else {
+				spin_lock_irqsave(io_lock, flags);
+				fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;
+				fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;
+				io_req->abts_done = &tm_done;
+				spin_unlock_irqrestore(io_lock, flags);
+				FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+				"Abort and terminate issued on Device reset "
+				"tag 0x%x sc 0x%p\n", tag, sc);
+				break;
+			}
+		}
+		while (1) {
+			spin_lock_irqsave(io_lock, flags);
+			if (!(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) {
+				spin_unlock_irqrestore(io_lock, flags);
+				wait_for_completion_timeout(&tm_done,
+				msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
+				break;
+			} else {
+				io_req = fnic_priv(sc)->io_req;
+				io_req->abts_done = NULL;
+				goto fnic_device_reset_clean;
+			}
+		}
+	} else {
+		spin_unlock_irqrestore(io_lock, flags);
+	}
+
+	/* Completed, but not successful, clean up the io_req, return fail */
+	if (status != FCPIO_SUCCESS) {
+		spin_lock_irqsave(io_lock, flags);
+		FNIC_SCSI_DBG(KERN_DEBUG,
+			      fnic->lport->host,
+			      "Device reset completed - failed\n");
+		io_req = fnic_priv(sc)->io_req;
+		goto fnic_device_reset_clean;
+	}
+
+	/*
+	 * Clean up any aborts on this lun that have still not
+	 * completed. If any of these fail, then LUN reset fails.
+	 * clean_pending_aborts cleans all cmds on this lun except
+	 * the lun reset cmd. If all cmds get cleaned, the lun reset
+	 * succeeds
+	 */
+	if (fnic_clean_pending_aborts(fnic, sc, new_sc)) {
+		spin_lock_irqsave(io_lock, flags);
+		io_req = fnic_priv(sc)->io_req;
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "Device reset failed"
+			      " since could not abort all IOs\n");
+		goto fnic_device_reset_clean;
+	}
+
+	/* Clean lun reset command */
+	spin_lock_irqsave(io_lock, flags);
+	io_req = fnic_priv(sc)->io_req;
+	if (io_req)
+		/* Completed, and successful */
+		ret = SUCCESS;
+
+fnic_device_reset_clean:
+	if (io_req)
+		fnic_priv(sc)->io_req = NULL;
+
+	spin_unlock_irqrestore(io_lock, flags);
+
+	if (io_req) {
+		start_time = io_req->start_time;
+		fnic_release_ioreq_buf(fnic, io_req, sc);
+		mempool_free(io_req, fnic->io_req_pool);
+	}
+
+fnic_device_reset_end:
+	FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc,
+		  jiffies_to_msecs(jiffies - start_time),
+		  0, ((u64)sc->cmnd[0] << 32 |
+		  (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
+		  (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
+		  fnic_flags_and_state(sc));
+
+	if (new_sc) {
+		fnic->sgreset_sc = NULL;
+		mutex_unlock(&fnic->sgreset_mutex);
+	}
+
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "Returning from device reset %s\n",
+		      (ret == SUCCESS) ?
+		      "SUCCESS" : "FAILED");
+
+	if (ret == FAILED)
+		atomic64_inc(&reset_stats->device_reset_failures);
+
+	return ret;
+}
+
+/* Clean up all IOs, clean up libFC local port */
+int fnic_reset(struct Scsi_Host *shost)
+{
+	struct fc_lport *lp;
+	struct fnic *fnic;
+	int ret = 0;
+	struct reset_stats *reset_stats;
+
+	lp = shost_priv(shost);
+	fnic = lport_priv(lp);
+	reset_stats = &fnic->fnic_stats.reset_stats;
+
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "fnic_reset called\n");
+
+	atomic64_inc(&reset_stats->fnic_resets);
+
+	/*
+	 * Reset local port, this will clean up libFC exchanges,
+	 * reset remote port sessions, and if link is up, begin flogi
+	 */
+	ret = fc_lport_reset(lp);
+
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "Returning from fnic reset %s\n",
+		      (ret == 0) ?
+		      "SUCCESS" : "FAILED");
+
+	if (ret == 0)
+		atomic64_inc(&reset_stats->fnic_reset_completions);
+	else
+		atomic64_inc(&reset_stats->fnic_reset_failures);
+
+	return ret;
+}
+
+/*
+ * SCSI Error handling calls driver's eh_host_reset if all prior
+ * error handling levels return FAILED. If host reset completes
+ * successfully, and if link is up, then Fabric login begins.
+ *
+ * Host Reset is the highest level of error recovery. If this fails, then
+ * host is offlined by SCSI.
+ *
+ */
+int fnic_host_reset(struct scsi_cmnd *sc)
+{
+	int ret;
+	unsigned long wait_host_tmo;
+	struct Scsi_Host *shost = sc->device->host;
+	struct fc_lport *lp = shost_priv(shost);
+	struct fnic *fnic = lport_priv(lp);
+	unsigned long flags;
+
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+	if (!fnic->internal_reset_inprogress) {
+		fnic->internal_reset_inprogress = true;
+	} else {
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			"host reset in progress skipping another host reset\n");
+		return SUCCESS;
+	}
+	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+	/*
+	 * If fnic_reset is successful, wait for fabric login to complete
+	 * scsi-ml tries to send a TUR to every device if host reset is
+	 * successful, so before returning to scsi, fabric should be up
+	 */
+	ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
+	if (ret == SUCCESS) {
+		wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
+		ret = FAILED;
+		while (time_before(jiffies, wait_host_tmo)) {
+			if ((lp->state == LPORT_ST_READY) &&
+			    (lp->link_up)) {
+				ret = SUCCESS;
+				break;
+			}
+			ssleep(1);
+		}
+	}
+
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+	fnic->internal_reset_inprogress = false;
+	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+	return ret;
+}
+
+/*
+ * This fxn is called from libFC when host is removed
+ */
+void fnic_scsi_abort_io(struct fc_lport *lp)
+{
+	int err = 0;
+	unsigned long flags;
+	enum fnic_state old_state;
+	struct fnic *fnic = lport_priv(lp);
+	DECLARE_COMPLETION_ONSTACK(remove_wait);
+
+	/* Issue firmware reset for fnic, wait for reset to complete */
+retry_fw_reset:
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+	if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) &&
+		     fnic->link_events) {
+		/* fw reset is in progress, poll for its completion */
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		schedule_timeout(msecs_to_jiffies(100));
+		goto retry_fw_reset;
+	}
+
+	fnic->remove_wait = &remove_wait;
+	old_state = fnic->state;
+	fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
+	fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
+	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+	err = fnic_fw_reset_handler(fnic);
+	if (err) {
+		spin_lock_irqsave(&fnic->fnic_lock, flags);
+		if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
+			fnic->state = old_state;
+		fnic->remove_wait = NULL;
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		return;
+	}
+
+	/* Wait for firmware reset to complete */
+	wait_for_completion_timeout(&remove_wait,
+				    msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
+
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+	fnic->remove_wait = NULL;
+	FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+		      "fnic_scsi_abort_io %s\n",
+		      (fnic->state == FNIC_IN_ETH_MODE) ?
+		      "SUCCESS" : "FAILED");
+	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+}
+
+/*
+ * This fxn called from libFC to clean up driver IO state on link down
+ */
+void fnic_scsi_cleanup(struct fc_lport *lp)
+{
+	unsigned long flags;
+	enum fnic_state old_state;
+	struct fnic *fnic = lport_priv(lp);
+
+	/* issue fw reset */
+retry_fw_reset:
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+	if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
+		/* fw reset is in progress, poll for its completion */
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		schedule_timeout(msecs_to_jiffies(100));
+		goto retry_fw_reset;
+	}
+	old_state = fnic->state;
+	fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
+	fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
+	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+	if (fnic_fw_reset_handler(fnic)) {
+		spin_lock_irqsave(&fnic->fnic_lock, flags);
+		if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
+			fnic->state = old_state;
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+	}
+
+}
+
+void fnic_empty_scsi_cleanup(struct fc_lport *lp)
+{
+}
+
+void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
+{
+	struct fnic *fnic = lport_priv(lp);
+
+	/* Non-zero sid, nothing to do */
+	if (sid)
+		goto call_fc_exch_mgr_reset;
+
+	if (did) {
+		fnic_rport_exch_reset(fnic, did);
+		goto call_fc_exch_mgr_reset;
+	}
+
+	/*
+	 * sid = 0, did = 0
+	 * link down or device being removed
+	 */
+	if (!fnic->in_remove)
+		fnic_scsi_cleanup(lp);
+	else
+		fnic_scsi_abort_io(lp);
+
+	/* call libFC exch mgr reset to reset its exchanges */
+call_fc_exch_mgr_reset:
+	fc_exch_mgr_reset(lp, sid, did);
+
+}
+
+static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data)
+{
+	struct fnic_pending_aborts_iter_data *iter_data = data;
+	struct fnic *fnic = iter_data->fnic;
+	int cmd_state;
+	struct fnic_io_req *io_req;
+	spinlock_t *io_lock;
+	unsigned long flags;
+
+	/*
+	 * ignore this lun reset cmd or cmds that do not belong to
+	 * this lun
+	 */
+	if (iter_data->lr_sc && sc == iter_data->lr_sc)
+		return true;
+	if (iter_data->lun_dev && sc->device != iter_data->lun_dev)
+		return true;
+
+	io_lock = fnic_io_lock_hash(fnic, sc);
+	spin_lock_irqsave(io_lock, flags);
+
+	io_req = fnic_priv(sc)->io_req;
+	if (!io_req) {
+		spin_unlock_irqrestore(io_lock, flags);
+		return true;
+	}
+
+	/*
+	 * Found IO that is still pending with firmware and
+	 * belongs to the LUN that we are resetting
+	 */
+	FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+		      "Found IO in %s on lun\n",
+		      fnic_ioreq_state_to_str(fnic_priv(sc)->state));
+	cmd_state = fnic_priv(sc)->state;
+	spin_unlock_irqrestore(io_lock, flags);
+	if (cmd_state == FNIC_IOREQ_ABTS_PENDING)
+		iter_data->ret = 1;
+
+	return iter_data->ret ? false : true;
+}
+
+/*
+ * fnic_is_abts_pending() is a helper function that
+ * walks through tag map to check if there is any IOs pending,if there is one,
+ * then it returns 1 (true), otherwise 0 (false)
+ * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
+ * otherwise, it checks for all IOs.
+ */
+int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
+{
+	struct fnic_pending_aborts_iter_data iter_data = {
+		.fnic = fnic,
+		.lun_dev = NULL,
+		.ret = 0,
+	};
+
+	if (lr_sc) {
+		iter_data.lun_dev = lr_sc->device;
+		iter_data.lr_sc = lr_sc;
+	}
+
+	/* walk again to check, if IOs are still pending in fw */
+	scsi_host_busy_iter(fnic->lport->host,
+			    fnic_abts_pending_iter, &iter_data);
+
+	return iter_data.ret;
+}