qla2xxx LLD target mode + tcm_qla2xxx fabric module

new file mode 100644
index 0000000..713e684
@@ -0,0 +1,5556 @@
+/*
+ *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
+ *
+ *  based on qla2x00t.c code:
+ *
+ *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <[email protected]>
+ *  Copyright (C) 2004 - 2005 Leonid Stoljar
+ *  Copyright (C) 2006 Nathaniel Clark <[email protected]>
+ *  Copyright (C) 2006 - 2010 ID7 Ltd.
+ *
+ *  Forward port and refactoring to modern qla2xxx and target/configfs
+ *
+ *  Copyright (C) 2010-2011 Nicholas A. Bellinger <[email protected]>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation, version 2
+ *  of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *  GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/list.h>
+#include <asm/unaligned.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <target/target_core_base.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_tmr.h>
+
+#include "qla_def.h"
+#include "qla_target.h"
+
+static char *qlini_mode = QLA2X_INI_MODE_STR_EXCLUSIVE;
+module_param(qlini_mode, charp, S_IRUGO);
+MODULE_PARM_DESC(qlini_mode,
+	"Determines when initiator mode will be enabled. Possible values: "
+	"\"exclusive\" (default) - initiator mode will be enabled on load, "
+	"disabled on enabling target mode and then on disabling target mode "
+	"enabled back; "
+	"\"disabled\" - initiator mode will never be enabled; "
+	"\"enabled\" - initiator mode will always stay enabled.");
+
+static int ql2x_ini_mode = QLA2X_INI_MODE_EXCLUSIVE;
+
+/*
+ * From scsi/fc/fc_fcp.h
+ */
+enum fcp_resp_rsp_codes {
+	FCP_TMF_CMPL = 0,
+	FCP_DATA_LEN_INVALID = 1,
+	FCP_CMND_FIELDS_INVALID = 2,
+	FCP_DATA_PARAM_MISMATCH = 3,
+	FCP_TMF_REJECTED = 4,
+	FCP_TMF_FAILED = 5,
+	FCP_TMF_INVALID_LUN = 9,
+};
+
+/*
+ * fc_pri_ta from scsi/fc/fc_fcp.h
+ */
+#define FCP_PTA_SIMPLE      0   /* simple task attribute */
+#define FCP_PTA_HEADQ       1   /* head of queue task attribute */
+#define FCP_PTA_ORDERED     2   /* ordered task attribute */
+#define FCP_PTA_ACA         4   /* auto. contigent allegiance */
+#define FCP_PTA_MASK        7   /* mask for task attribute field */
+#define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
+#define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
+
+/*
+ * This driver calls qla2x00_req_pkt() and qla2x00_issue_marker(), which
+ * must be called under HW lock and could unlock/lock it inside.
+ * It isn't an issue, since in the current implementation on the time when
+ * those functions are called:
+ *
+ *   - Either context is IRQ and only IRQ handler can modify HW data,
+ *     including rings related fields,
+ *
+ *   - Or access to target mode variables from struct qla_tgt doesn't
+ *     cross those functions boundaries, except tgt_stop, which
+ *     additionally protected by irq_cmd_count.
+ */
+
+static int __qla24xx_xmit_response(struct qla_tgt_cmd *, int, uint8_t);
+
+/* Predefs for callbacks handed to qla2xxx LLD */
+static void qla24xx_atio_pkt(struct scsi_qla_host *ha, atio7_entry_t *pkt);
+static void qla_tgt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
+static int qla_tgt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
+	int fn, void *iocb, int flags);
+static void qla2xxx_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd *cmd,
+	atio_entry_t *atio, int ha_locked);
+static void qla24xx_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd *cmd,
+	atio7_entry_t *atio, int ha_locked);
+static void qla_tgt_reject_free_srr_imm(struct scsi_qla_host *ha, struct srr_imm *imm,
+	int ha_lock);
+static int qla_tgt_cut_cmd_data_head(struct qla_tgt_cmd *cmd, unsigned int offset);
+static void qla_tgt_clear_tgt_db(struct qla_tgt *tgt, bool local_only);
+static int qla_tgt_unreg_sess(struct qla_tgt_sess *sess);
+
+/* Used by qla_target.c code to decode SCSI LUN to TCM unpacked_lun */
+static uint32_t qla_tgt_unpack_lun(unsigned char *p);
+
+/*
+ * Global Variables
+ */
+static struct kmem_cache *qla_tgt_cmd_cachep;
+static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
+static mempool_t *qla_tgt_mgmt_cmd_mempool;
+
+static DECLARE_RWSEM(qla_tgt_unreg_rwsem);
+
+/*
+ * From qla2xxx/qla_iobc.c and used by various qla_target.c logic
+ */
+extern request_t *qla2x00_req_pkt(struct scsi_qla_host *);
+
+/* ha->hardware_lock supposed to be held on entry */
+static inline void qla_tgt_sess_get(struct qla_tgt_sess *sess)
+{
+	sess->sess_ref++;
+	DEBUG21(qla_printk(KERN_INFO, sess->vha->hw, "sess %p, new sess_ref %d\n",
+			sess, sess->sess_ref));
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+void qla_tgt_sess_put(struct qla_tgt_sess *sess)
+{
+	DEBUG21(qla_printk(KERN_INFO, sess->vha->hw, "sess %p, new sess_ref %d\n",
+			sess, sess->sess_ref-1));
+	BUG_ON(sess->sess_ref == 0);
+
+	sess->sess_ref--;
+	if (sess->sess_ref == 0)
+		qla_tgt_unreg_sess(sess);
+}
+EXPORT_SYMBOL(qla_tgt_sess_put);
+
+/* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
+static struct qla_tgt_sess *qla_tgt_find_sess_by_port_name(
+	struct qla_tgt *tgt,
+	const uint8_t *port_name)
+{
+	struct qla_tgt_sess *sess;
+
+	list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
+		if ((sess->port_name[0] == port_name[0]) &&
+		    (sess->port_name[1] == port_name[1]) &&
+		    (sess->port_name[2] == port_name[2]) &&
+		    (sess->port_name[3] == port_name[3]) &&
+		    (sess->port_name[4] == port_name[4]) &&
+		    (sess->port_name[5] == port_name[5]) &&
+		    (sess->port_name[6] == port_name[6]) &&
+		    (sess->port_name[7] == port_name[7]))
+			return sess;
+	}
+
+	return NULL;
+}
+
+/* Might release hw lock, then reaquire!! */
+static inline int qla_tgt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
+{
+	/* Send marker if required */
+	if (unlikely(vha->marker_needed != 0)) {
+		int rc = qla2x00_issue_marker(vha, vha_locked);
+		if (rc != QLA_SUCCESS) {
+			printk(KERN_ERR "qla_target(%d): issue_marker() "
+				"failed\n", vha->vp_idx);
+		}
+		return rc;
+	}
+	return QLA_SUCCESS;
+}
+
+static inline
+struct scsi_qla_host *qla_tgt_find_host_by_d_id(struct scsi_qla_host *vha, uint8_t *d_id)
+{
+	struct qla_hw_data *ha = vha->hw;
+
+	if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
+		return NULL;
+
+	if (vha->d_id.b.al_pa == d_id[2])
+		return vha;
+
+	if (IS_FWI2_CAPABLE(ha)) {
+		uint8_t vp_idx;
+		BUG_ON(ha->tgt_vp_map == NULL);
+		vp_idx = ha->tgt_vp_map[d_id[2]].idx;
+		if (likely(test_bit(vp_idx, ha->vp_idx_map)))
+			return ha->tgt_vp_map[vp_idx].vha;
+	}
+
+	return NULL;
+}
+
+static inline
+struct scsi_qla_host *qla_tgt_find_host_by_vp_idx(struct scsi_qla_host *vha, uint16_t vp_idx)
+{
+	struct qla_hw_data *ha = vha->hw;
+
+	if (vha->vp_idx == vp_idx)
+		return vha;
+
+	if (IS_FWI2_CAPABLE(ha)) {
+		BUG_ON(ha->tgt_vp_map == NULL);
+		if (likely(test_bit(vp_idx, ha->vp_idx_map)))
+			return ha->tgt_vp_map[vp_idx].vha;
+	}
+
+	return NULL;
+}
+
+void qla24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, atio7_entry_t *atio)
+{
+	struct qla_hw_data *ha = vha->hw;
+
+	switch (atio->entry_type) {
+	case ATIO_TYPE7:
+	{
+		struct scsi_qla_host *host = qla_tgt_find_host_by_d_id(vha, atio->fcp_hdr.d_id);
+		if (unlikely(NULL == host)) {
+			printk(KERN_ERR "qla_target(%d): Received ATIO_TYPE7 "
+				"with unknown d_id %x:%x:%x\n", vha->vp_idx,
+				atio->fcp_hdr.d_id[0], atio->fcp_hdr.d_id[1],
+				atio->fcp_hdr.d_id[2]);
+			break;
+		}
+		qla24xx_atio_pkt(host, atio);
+		break;
+	}
+
+	case IMMED_NOTIFY_TYPE:
+	{
+		struct scsi_qla_host *host = vha;
+
+		if (IS_FWI2_CAPABLE(ha)) {
+			notify24xx_entry_t *entry = (notify24xx_entry_t *)atio;
+			if ((entry->vp_index != 0xFF) &&
+			    (entry->nport_handle != 0xFFFF)) {
+				host = qla_tgt_find_host_by_vp_idx(vha,
+							entry->vp_index);
+				if (unlikely(!host)) {
+					printk(KERN_ERR "qla_target(%d): Received "
+						"ATIO (IMMED_NOTIFY_TYPE) "
+						"with unknown vp_index %d\n",
+						vha->vp_idx, entry->vp_index);
+					break;
+				}
+			}
+		}
+		qla24xx_atio_pkt(host, atio);
+		break;
+	}
+
+	default:
+		printk(KERN_ERR "qla_target(%d): Received unknown ATIO atio "
+		     "type %x\n", vha->vp_idx, atio->entry_type);
+		break;
+	}
+
+	return;
+}
+
+void qla_tgt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
+{
+	struct qla_hw_data *ha = vha->hw;
+
+	switch (pkt->entry_type) {
+	case CTIO_TYPE7:
+	{
+		ctio7_fw_entry_t *entry = (ctio7_fw_entry_t *)pkt;
+		struct scsi_qla_host *host = qla_tgt_find_host_by_vp_idx(vha,
+						entry->vp_index);
+		if (unlikely(!host)) {
+			printk(KERN_ERR "qla_target(%d): Response pkt (CTIO_TYPE7) "
+				"received, with unknown vp_index %d\n",
+				vha->vp_idx, entry->vp_index);
+			break;
+		}
+		qla_tgt_response_pkt(host, pkt);
+		break;
+	}
+
+	case IMMED_NOTIFY_TYPE:
+	{
+		struct scsi_qla_host *host = vha;
+		if (IS_FWI2_CAPABLE(ha)) {
+			notify24xx_entry_t *entry = (notify24xx_entry_t *)pkt;
+			host = qla_tgt_find_host_by_vp_idx(vha, entry->vp_index);
+			if (unlikely(!host)) {
+				printk(KERN_ERR "qla_target(%d): Response pkt "
+					"(IMMED_NOTIFY_TYPE) received, "
+					"with unknown vp_index %d\n",
+					vha->vp_idx, entry->vp_index);
+				break;
+			}
+		}
+		qla_tgt_response_pkt(host, pkt);
+		break;
+	}
+
+	case NOTIFY_ACK_TYPE:
+	{
+		struct scsi_qla_host *host = vha;
+		if (IS_FWI2_CAPABLE(ha)) {
+			nack24xx_entry_t *entry = (nack24xx_entry_t *)pkt;
+			if (0xFF != entry->vp_index) {
+				host = qla_tgt_find_host_by_vp_idx(vha,
+						entry->vp_index);
+				if (unlikely(!host)) {
+					printk(KERN_ERR "qla_target(%d): Response "
+						"pkt (NOTIFY_ACK_TYPE) "
+						"received, with unknown "
+						"vp_index %d\n", vha->vp_idx,
+						entry->vp_index);
+					break;
+				}
+			}
+		}
+		qla_tgt_response_pkt(host, pkt);
+		break;
+	}
+
+	case ABTS_RECV_24XX:
+	{
+		abts24_recv_entry_t *entry = (abts24_recv_entry_t *)pkt;
+		struct scsi_qla_host *host = qla_tgt_find_host_by_vp_idx(vha,
+						entry->vp_index);
+		if (unlikely(!host)) {
+			printk(KERN_ERR "qla_target(%d): Response pkt "
+				"(ABTS_RECV_24XX) received, with unknown "
+				"vp_index %d\n", vha->vp_idx, entry->vp_index);
+			break;
+		}
+		qla_tgt_response_pkt(host, pkt);
+		break;
+	}
+
+	case ABTS_RESP_24XX:
+	{
+		abts24_resp_entry_t *entry = (abts24_resp_entry_t *)pkt;
+		struct scsi_qla_host *host = qla_tgt_find_host_by_vp_idx(vha,
+						entry->vp_index);
+		if (unlikely(!host)) {
+			printk(KERN_ERR "qla_target(%d): Response pkt "
+				"(ABTS_RECV_24XX) received, with unknown "
+				"vp_index %d\n", vha->vp_idx, entry->vp_index);
+			break;
+		}
+		qla_tgt_response_pkt(host, pkt);
+		break;
+	}
+
+	default:
+		qla_tgt_response_pkt(vha, pkt);
+		break;
+	}
+
+}
+
+
+/* ha->hardware_lock supposed to be held on entry */
+static void qla_tgt_free_session_done(struct qla_tgt_sess *sess)
+{
+	struct qla_tgt *tgt;
+	struct scsi_qla_host *vha = sess->vha;
+	struct qla_hw_data *ha = vha->hw;
+
+	tgt = sess->tgt;
+	/*
+	 * Release the target session for FC Nexus from fabric module code.
+	 */
+	if (sess->se_sess != NULL)
+		ha->qla2x_tmpl->free_session(sess);
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "Unregistration of"
+		" sess %p finished\n", sess));
+
+	kfree(sess);
+
+	if (!tgt)
+		return;
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "empty(sess_list) %d"
+		" sess_count %d\n", list_empty(&tgt->sess_list), tgt->sess_count));
+	/*
+	 * We need to protect against race, when tgt is freed before or
+	 * inside wake_up()
+	 */
+	tgt->sess_count--;
+	if (tgt->sess_count == 0)
+		wake_up_all(&tgt->waitQ);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qla_tgt_unreg_sess(struct qla_tgt_sess *sess)
+{
+	int res = 1;
+
+	BUG_ON(sess == NULL);
+	BUG_ON(sess->sess_ref != 0);
+
+	list_del(&sess->sess_list_entry);
+
+	if (sess->deleted)
+		list_del(&sess->del_list_entry);
+
+	printk(KERN_INFO "qla_target(%d): %ssession for loop_id %d deleted\n",
+		sess->vha->vp_idx, sess->local ? "local " : "",
+		sess->loop_id);
+
+	qla_tgt_free_session_done(sess);
+
+	return res;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qla_tgt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
+{
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt_sess *sess = NULL;
+	uint32_t unpacked_lun, lun = 0;
+	uint16_t loop_id;
+	int res = 0;
+	uint8_t s_id[3];
+
+	memset(&s_id, 0, 3);
+
+	if (IS_FWI2_CAPABLE(ha)) {
+		notify24xx_entry_t *n = (notify24xx_entry_t *)iocb;
+		loop_id = le16_to_cpu(n->nport_handle);
+		s_id[0] = n->port_id[0];
+		s_id[1] = n->port_id[1];
+		s_id[2] = n->port_id[2];
+	} else
+		loop_id = GET_TARGET_ID(ha, (notify_entry_t *)iocb);
+
+	if (loop_id == 0xFFFF) {
+#warning FIXME: Re-enable Global event handling..
+#if 0
+		/* Global event */
+		printk("Processing qla_tgt_reset with loop_id=0xffff global event............\n");
+		atomic_inc(&ha->qla_tgt->tgt_global_resets_count);
+		qla_tgt_clear_tgt_db(ha->qla_tgt, 1);
+		if (!list_empty(&ha->qla_tgt->sess_list)) {
+			sess = list_entry(ha->qla_tgt->sess_list.next,
+				typeof(*sess), sess_list_entry);
+			switch (mcmd) {
+			case QLA_TGT_NEXUS_LOSS_SESS:
+				mcmd = QLA_TGT_NEXUS_LOSS;
+				break;
+			case QLA_TGT_ABORT_ALL_SESS:
+				mcmd = QLA_TGT_ABORT_ALL;
+				break;
+			case QLA_TGT_NEXUS_LOSS:
+			case QLA_TGT_ABORT_ALL:
+				break;
+			default:
+				printk(KERN_ERR "qla_target(%d): Not allowed "
+					"command %x in %s", vha->vp_idx,
+					mcmd, __func__);
+				sess = NULL;
+				break;
+			}
+		} else
+			sess = NULL;
+#endif
+	} else {
+		sess = ha->qla2x_tmpl->find_sess_by_loop_id(vha, loop_id);
+	}
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "Using sess for qla_tgt_reset: %p\n", sess));
+	if (!sess) {
+		res = -ESRCH;
+		ha->qla_tgt->tm_to_unknown = 1;
+		return res;
+	}
+
+	printk(KERN_INFO "scsi(%ld): resetting (session %p from port "
+		"%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, "
+		"mcmd %x, loop_id %d)\n", vha->host_no, sess,
+		sess->port_name[0], sess->port_name[1],
+		sess->port_name[2], sess->port_name[3],
+		sess->port_name[4], sess->port_name[5],
+		sess->port_name[6], sess->port_name[7],
+		mcmd, loop_id);
+
+	if (IS_FWI2_CAPABLE(ha)) {
+		atio7_entry_t *a = (atio7_entry_t *)iocb;
+		lun = a->fcp_cmnd.lun;
+	} else {
+		notify_entry_t *n = (notify_entry_t *)iocb;
+		lun = swab16(le16_to_cpu(n->lun));
+	}
+	unpacked_lun = qla_tgt_unpack_lun((unsigned char *)&lun);
+
+	return qla_tgt_issue_task_mgmt(sess, unpacked_lun, mcmd,
+				iocb, Q24_MGMT_SEND_NACK);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static void qla_tgt_schedule_sess_for_deletion(struct qla_tgt_sess *sess)
+{
+	struct qla_tgt *tgt = sess->tgt;
+	uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
+	bool schedule;
+
+	if (sess->deleted)
+		return;
+	/*
+	 * If the list is empty, then, most likely, the work isn't
+	 * scheduled.
+	 */
+	schedule = list_empty(&tgt->del_sess_list);
+
+	DEBUG21(qla_printk(KERN_INFO, sess->vha->hw, "Scheduling sess %p for"
+		" deletion (schedule %d)", sess, schedule));
+	list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
+	sess->deleted = 1;
+	sess->expires = jiffies + dev_loss_tmo * HZ;
+
+	printk(KERN_INFO "qla_target(%d): session for port %02x:%02x:%02x:"
+		"%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for "
+		"deletion in %d secs\n", sess->vha->vp_idx,
+		sess->port_name[0], sess->port_name[1],
+		sess->port_name[2], sess->port_name[3],
+		sess->port_name[4], sess->port_name[5],
+		sess->port_name[6], sess->port_name[7],
+		sess->loop_id, dev_loss_tmo);
+
+	if (schedule)
+		schedule_delayed_work(&tgt->sess_del_work,
+				jiffies - sess->expires);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static void qla_tgt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
+{
+	struct qla_tgt_sess *sess, *sess_tmp;
+
+	list_for_each_entry_safe(sess, sess_tmp, &tgt->sess_list,
+					sess_list_entry) {
+		if (local_only) {
+			if (!sess->local)
+				continue;
+			qla_tgt_schedule_sess_for_deletion(sess);
+		} else
+			qla_tgt_sess_put(sess);
+	}
+
+	/* At this point tgt could be already dead */
+}
+
+static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
+	uint16_t *loop_id)
+{
+	struct qla_hw_data *ha = vha->hw;
+	dma_addr_t gid_list_dma;
+	struct gid_list_info *gid_list;
+	char *id_iter;
+	int res, rc, i;
+	uint16_t entries;
+
+	gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
+			&gid_list_dma, GFP_KERNEL);
+	if (!gid_list) {
+		printk(KERN_ERR "qla_target(%d): DMA Alloc failed of %zd\n",
+			vha->vp_idx, GID_LIST_SIZE);
+		return -ENOMEM;
+	}
+
+	/* Get list of logged in devices */
+	rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
+	if (rc != QLA_SUCCESS) {
+		printk(KERN_ERR "qla_target(%d): get_id_list() failed: %x\n",
+			vha->vp_idx, rc);
+		res = -1;
+		goto out_free_id_list;
+	}
+
+	id_iter = (char *)gid_list;
+	res = -1;
+	for (i = 0; i < entries; i++) {
+		struct gid_list_info *gid = (struct gid_list_info *)id_iter;
+		if ((gid->al_pa == s_id[2]) &&
+		    (gid->area == s_id[1]) &&
+		    (gid->domain == s_id[0])) {
+			*loop_id = le16_to_cpu(gid->loop_id);
+			res = 0;
+			break;
+		}
+		id_iter += ha->gid_list_info_size;
+	}
+
+out_free_id_list:
+	dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, gid_list, gid_list_dma);
+
+	return res;
+}
+
+static bool qla_tgt_check_fcport_exist(struct scsi_qla_host *vha, struct qla_tgt_sess *sess)
+{
+	struct qla_hw_data *ha = vha->hw;
+	bool res, found = false;
+	int rc, i;
+	uint16_t loop_id = 0xFFFF; /* to eliminate compiler's warning */
+	uint16_t entries;
+	void *pmap;
+	int pmap_len;
+	fc_port_t *fcport;
+	int global_resets;
+
+retry:
+	global_resets = atomic_read(&ha->qla_tgt->tgt_global_resets_count);
+
+	rc = qla2x00_get_node_name_list(vha, &pmap, &pmap_len);
+	if (rc != QLA_SUCCESS) {
+		res = false;
+		goto out;
+	}
+
+	if (IS_FWI2_CAPABLE(ha)) {
+		struct qla_port24_data *pmap24 = pmap;
+
+		entries = pmap_len/sizeof(*pmap24);
+
+		for (i = 0; i < entries; ++i) {
+			if ((sess->port_name[0] == pmap24[i].port_name[0]) &&
+			    (sess->port_name[1] == pmap24[i].port_name[1]) &&
+			    (sess->port_name[2] == pmap24[i].port_name[2]) &&
+			    (sess->port_name[3] == pmap24[i].port_name[3]) &&
+			    (sess->port_name[4] == pmap24[i].port_name[4]) &&
+			    (sess->port_name[5] == pmap24[i].port_name[5]) &&
+			    (sess->port_name[6] == pmap24[i].port_name[6]) &&
+			    (sess->port_name[7] == pmap24[i].port_name[7])) {
+				loop_id = le16_to_cpu(pmap24[i].loop_id);
+				found = true;
+				break;
+			}
+		}
+	} else {
+		struct qla_port23_data *pmap2x = pmap;
+
+		entries = pmap_len/sizeof(*pmap2x);
+
+		for (i = 0; i < entries; ++i) {
+			if ((sess->port_name[0] == pmap2x[i].port_name[0]) &&
+			    (sess->port_name[1] == pmap2x[i].port_name[1]) &&
+			    (sess->port_name[2] == pmap2x[i].port_name[2]) &&
+			    (sess->port_name[3] == pmap2x[i].port_name[3]) &&
+			    (sess->port_name[4] == pmap2x[i].port_name[4]) &&
+			    (sess->port_name[5] == pmap2x[i].port_name[5]) &&
+			    (sess->port_name[6] == pmap2x[i].port_name[6]) &&
+			    (sess->port_name[7] == pmap2x[i].port_name[7])) {
+				loop_id = le16_to_cpu(pmap2x[i].loop_id);
+				found = true;
+				break;
+			}
+		}
+	}
+
+	kfree(pmap);
+
+	if (!found) {
+		res = false;
+		goto out;
+	}
+
+	printk(KERN_INFO "qla_tgt_check_fcport_exist(): loop_id %d", loop_id);
+
+	fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
+	if (fcport == NULL) {
+		printk(KERN_ERR "qla_target(%d): Allocation of tmp FC port failed",
+			vha->vp_idx);
+		res = false;
+		goto out;
+	}
+
+	fcport->loop_id = loop_id;
+
+	rc = qla2x00_get_port_database(vha, fcport, 0);
+	if (rc != QLA_SUCCESS) {
+		printk(KERN_ERR "qla_target(%d): Failed to retrieve fcport "
+			"information -- get_port_database() returned %x "
+			"(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
+		res = false;
+		goto out_free_fcport;
+	}
+
+	if (global_resets != atomic_read(&ha->qla_tgt->tgt_global_resets_count)) {
+		DEBUG22(qla_printk(KERN_INFO, ha, "qla_target(%d): global reset"
+			" during session discovery (counter was %d, new %d),"
+			" retrying", vha->vp_idx, global_resets,
+			atomic_read(&ha->qla_tgt->tgt_global_resets_count)));
+		goto retry;
+	}
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "Updating sess %p s_id %x:%x:%x, "
+		"loop_id %d) to d_id %x:%x:%x, loop_id %d", sess,
+		sess->s_id.b.domain, sess->s_id.b.al_pa,
+		sess->s_id.b.area, sess->loop_id, fcport->d_id.b.domain,
+		fcport->d_id.b.al_pa, fcport->d_id.b.area, fcport->loop_id));
+
+	sess->s_id = fcport->d_id;
+	sess->loop_id = fcport->loop_id;
+	sess->conf_compl_supported = fcport->conf_compl_supported;
+
+	res = true;
+
+out_free_fcport:
+	kfree(fcport);
+
+out:
+	return res;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static void qla_tgt_undelete_sess(struct qla_tgt_sess *sess)
+{
+	BUG_ON(!sess->deleted);
+
+	list_del(&sess->del_list_entry);
+	sess->deleted = 0;
+}
+
+static void qla_tgt_del_sess_work_fn(struct delayed_work *work)
+{
+	struct qla_tgt *tgt = container_of(work, struct qla_tgt,
+					sess_del_work);
+	struct scsi_qla_host *vha = tgt->vha;
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt_sess *sess;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	while (!list_empty(&tgt->del_sess_list)) {
+		sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
+				del_list_entry);
+		if (time_after_eq(jiffies, sess->expires)) {
+			bool cancel;
+
+			qla_tgt_undelete_sess(sess);
+
+			spin_unlock_irqrestore(&ha->hardware_lock, flags);
+			cancel = qla_tgt_check_fcport_exist(vha, sess);
+			spin_lock_irqsave(&ha->hardware_lock, flags);
+
+			if (cancel) {
+				if (sess->deleted) {
+					/*
+					 * sess was again deleted while we were
+					 * discovering it
+					 */
+					continue;
+				}
+
+				printk(KERN_INFO "qla_target(%d): cancel deletion of "
+					"session for port %02x:%02x:%02x:%02x:%02x:"
+					"%02x:%02x:%02x (loop ID %d), because it isn't"
+					" deleted by firmware", vha->vp_idx,
+					sess->port_name[0], sess->port_name[1],
+					sess->port_name[2], sess->port_name[3],
+					sess->port_name[4], sess->port_name[5],
+					sess->port_name[6], sess->port_name[7],
+					sess->loop_id);
+			} else {
+				DEBUG22(qla_printk(KERN_INFO, ha, "Timeout: sess %p"
+					" about to be deleted\n", sess));
+				qla_tgt_sess_put(sess);
+			}
+		} else {
+			schedule_delayed_work(&tgt->sess_del_work,
+				jiffies - sess->expires);
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+}
+
+/*
+ * Adds an extra ref to allow to drop hw lock after adding sess to the list.
+ * Caller must put it.
+ */
+static struct qla_tgt_sess *qla_tgt_create_sess(
+	struct scsi_qla_host *vha,
+	fc_port_t *fcport,
+	bool local)
+{
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt_sess *sess;
+	unsigned long flags;
+	unsigned char be_sid[3];
+
+	/* Check to avoid double sessions */
+#if 0
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
+		if ((sess->port_name[0] == fcport->port_name[0]) &&
+		    (sess->port_name[1] == fcport->port_name[1]) &&
+		    (sess->port_name[2] == fcport->port_name[2]) &&
+		    (sess->port_name[3] == fcport->port_name[3]) &&
+		    (sess->port_name[4] == fcport->port_name[4]) &&
+		    (sess->port_name[5] == fcport->port_name[5]) &&
+		    (sess->port_name[6] == fcport->port_name[6]) &&
+		    (sess->port_name[7] == fcport->port_name[7])) {
+			DEBUG22(qla_printk(KERN_INFO, "Double sess %p found (s_id %x:%x:%x, "
+				"loop_id %d), updating to d_id %x:%x:%x, "
+				"loop_id %d", sess, sess->s_id.b.domain,
+				sess->s_id.b.al_pa, sess->s_id.b.area,
+				sess->loop_id, fcport->d_id.b.domain,
+				fcport->d_id.b.al_pa, fcport->d_id.b.area,
+				fcport->loop_id));
+
+			if (sess->deleted)
+				qla_tgt_undelete_sess(sess);
+
+			qla_tgt_sess_get(sess);
+			sess->s_id = fcport->d_id;
+			sess->loop_id = fcport->loop_id;
+			sess->conf_compl_supported = fcport->conf_compl_supported;
+			if (sess->local && !local)
+				sess->local = 0;
+			spin_unlock_irqrestore(&ha->hardware_lock, flags);
+			goto out;
+		}
+	}
+	spin_unlock_irq_restore(&ha->hardware_lock, flags);
+#endif
+	/* We are under tgt_mutex, so a new sess can't be added behind us */
+
+	sess = kzalloc(sizeof(*sess), GFP_KERNEL);
+	if (!sess) {
+		printk(KERN_ERR "qla_target(%u): session allocation failed, "
+			"all commands from port %02x:%02x:%02x:%02x:"
+			"%02x:%02x:%02x:%02x will be refused", vha->vp_idx,
+			fcport->port_name[0], fcport->port_name[1],
+			fcport->port_name[2], fcport->port_name[3],
+			fcport->port_name[4], fcport->port_name[5],
+			fcport->port_name[6], fcport->port_name[7]);
+
+		return NULL;
+	}
+
+	sess->sess_ref = 2; /* plus 1 extra ref, see above */
+	sess->tgt = ha->qla_tgt;
+	sess->vha = vha;
+
+	sess->s_id = fcport->d_id;
+	sess->loop_id = fcport->loop_id;
+	sess->local = local;
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "Adding sess %p to tgt %p via"
+		" ->check_initiator_node_acl()\n", sess, ha->qla_tgt));
+
+	be_sid[0] = sess->s_id.b.domain;
+	be_sid[1] = sess->s_id.b.area;
+	be_sid[2] = sess->s_id.b.al_pa;
+	/*
+	 * Determine if this fc_port->port_name is allowed to access
+	 * target mode using explict NodeACLs+MappedLUNs, or using
+	 * TPG demo mode.  If this is successful a target mode FC nexus
+	 * is created.
+	 */
+	if (ha->qla2x_tmpl->check_initiator_node_acl(vha, &fcport->port_name[0],
+				sess, &be_sid[0], fcport->loop_id) < 0) {
+		kfree(sess);
+		return NULL;
+	}
+
+	sess->conf_compl_supported = fcport->conf_compl_supported;
+	BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
+	memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
+
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	list_add_tail(&sess->sess_list_entry, &ha->qla_tgt->sess_list);
+	ha->qla_tgt->sess_count++;
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	printk(KERN_INFO "qla_target(%d): %ssession for wwn %02x:%02x:%02x:%02x:"
+		"%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed"
+		" completion %ssupported) added\n", vha->vp_idx, local ?
+		"local " : "", fcport->port_name[0], fcport->port_name[1],
+		fcport->port_name[2], fcport->port_name[3], fcport->port_name[4],
+		fcport->port_name[5], fcport->port_name[6], fcport->port_name[7],
+		fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
+		sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
+
+	return sess;
+}
+
+/*
+ * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
+ */
+void qla_tgt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
+{
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt *tgt = ha->qla_tgt;
+	struct qla_tgt_sess *sess;
+	unsigned long flags;
+	unsigned char s_id[3];
+
+	if (!vha->hw->qla2x_tmpl)
+		return;
+
+	if (!tgt || (fcport->port_type != FCT_INITIATOR))
+		return;
+
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	if (tgt->tgt_stop) {
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+		return;
+	}
+	sess = qla_tgt_find_sess_by_port_name(tgt, fcport->port_name);
+	if (!sess) {
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+		memset(&s_id, 0, 3);
+		s_id[0] = fcport->d_id.b.domain;
+		s_id[1] = fcport->d_id.b.area;
+		s_id[2] = fcport->d_id.b.al_pa;
+
+		mutex_lock(&ha->tgt_mutex);
+		sess = qla_tgt_create_sess(vha, fcport, false);
+		mutex_unlock(&ha->tgt_mutex);
+
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+		if (sess != NULL)
+			qla_tgt_sess_put(sess); /* put the extra creation ref */
+	} else {
+		if (sess->deleted) {
+			qla_tgt_undelete_sess(sess);
+
+			printk(KERN_INFO "qla_target(%u): %ssession for port %02x:"
+				"%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) "
+				"reappeared\n", vha->vp_idx,
+				sess->local ? "local " : "", sess->port_name[0],
+				sess->port_name[1], sess->port_name[2],
+				sess->port_name[3], sess->port_name[4],
+				sess->port_name[5], sess->port_name[6],
+				sess->port_name[7], sess->loop_id);
+
+			DEBUG22(qla_printk(KERN_INFO, ha, "Reappeared sess %p\n", sess));
+		}
+		sess->s_id = fcport->d_id;
+		sess->loop_id = fcport->loop_id;
+		sess->conf_compl_supported = fcport->conf_compl_supported;
+	}
+
+	if (sess && sess->local) {
+		printk(KERN_INFO "qla_target(%u): local session for "
+			"port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
+			"(loop ID %d) became global\n", vha->vp_idx,
+			fcport->port_name[0], fcport->port_name[1],
+			fcport->port_name[2], fcport->port_name[3],
+			fcport->port_name[4], fcport->port_name[5],
+			fcport->port_name[6], fcport->port_name[7],
+			sess->loop_id);
+		sess->local = 0;
+	}
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+}
+
+void qla_tgt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
+{
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt *tgt = ha->qla_tgt;
+	struct qla_tgt_sess *sess;
+	unsigned long flags;
+
+	if (!vha->hw->qla2x_tmpl)
+		return;
+
+	if (!tgt || (fcport->port_type != FCT_INITIATOR))
+		return;
+
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	if (tgt->tgt_stop) {
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+		return;
+	}
+	sess = qla_tgt_find_sess_by_port_name(tgt, fcport->port_name);
+	if (!sess) {
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+		return;
+	}
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "qla_tgt_fc_port_deleted %p", sess));
+
+	sess->local = 1;
+	qla_tgt_schedule_sess_for_deletion(sess);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+}
+
+static inline int test_tgt_sess_count(struct qla_tgt *tgt)
+{
+	struct qla_hw_data *ha = tgt->ha;
+	unsigned long flags;
+	int res;
+	/*
+	 * We need to protect against race, when tgt is freed before or
+	 * inside wake_up()
+	 */
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	DEBUG21(qla_printk(KERN_INFO, ha, "tgt %p, empty(sess_list)=%d sess_count=%d\n",
+	      tgt, list_empty(&tgt->sess_list), tgt->sess_count));
+	res = (tgt->sess_count == 0);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	return res;
+}
+
+/* Called by tcm_qla2xxx configfs code */
+void qla_tgt_stop_phase1(struct qla_tgt *tgt)
+{
+	struct scsi_qla_host *vha = tgt->vha;
+	struct qla_hw_data *ha = tgt->ha;
+	unsigned long flags;
+
+	if (tgt->tgt_stop || tgt->tgt_stopped) {
+		printk(KERN_ERR "Already in tgt->tgt_stop or tgt_stopped state\n");
+		dump_stack();
+		return;
+	}
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "Stopping target for host %ld(%p)\n",
+				vha->host_no, vha));
+	/*
+	 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
+	 * Lock is needed, because we still can get an incoming packet.
+	 */
+	mutex_lock(&ha->tgt_mutex);
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	tgt->tgt_stop = 1;
+	qla_tgt_clear_tgt_db(tgt, false);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+	mutex_unlock(&ha->tgt_mutex);
+
+	cancel_delayed_work_sync(&tgt->sess_del_work);
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "Waiting for sess works (tgt %p)", tgt));
+	spin_lock_irqsave(&tgt->sess_work_lock, flags);
+	while (!list_empty(&tgt->sess_works_list)) {
+		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
+		flush_scheduled_work();
+		spin_lock_irqsave(&tgt->sess_work_lock, flags);
+	}
+	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "Waiting for tgt %p: list_empty(sess_list)=%d "
+		"sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
+		tgt->sess_count));
+
+	wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
+
+	/* Big hammer */
+	if (!ha->host_shutting_down && qla_tgt_mode_enabled(vha))
+		qla_tgt_disable_vha(vha);
+
+	/* Wait for sessions to clear out (just in case) */
+	wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
+}
+EXPORT_SYMBOL(qla_tgt_stop_phase1);
+
+/* Called by tcm_qla2xxx configfs code */
+void qla_tgt_stop_phase2(struct qla_tgt *tgt)
+{
+	struct qla_hw_data *ha = tgt->ha;
+	unsigned long flags;
+
+	if (tgt->tgt_stopped) {
+		printk(KERN_ERR "Already in tgt->tgt_stopped state\n");
+		dump_stack();
+		return;
+	}
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "Waiting for %d IRQ commands to"
+		" complete (tgt %p)", tgt->irq_cmd_count, tgt));
+
+	mutex_lock(&ha->tgt_mutex);
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	while (tgt->irq_cmd_count != 0) {
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+		udelay(2);
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+	}
+	tgt->tgt_stop = 0;
+	tgt->tgt_stopped = 1;
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+	mutex_unlock(&ha->tgt_mutex);
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "Stop of tgt %p finished", tgt));
+}
+EXPORT_SYMBOL(qla_tgt_stop_phase2);
+
+/* Called from qla_tgt_remove_target() -> qla2x00_remove_one() */
+void qla_tgt_release(struct qla_tgt *tgt)
+{
+	struct qla_hw_data *ha = tgt->ha;
+
+	if ((ha->qla_tgt != NULL) && !tgt->tgt_stopped)
+		qla_tgt_stop_phase2(tgt);
+
+	ha->qla_tgt = NULL;
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "Release of tgt %p finished\n", tgt));
+
+	kfree(tgt);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qla_tgt_sched_sess_work(struct qla_tgt *tgt, int type,
+	const void *param, unsigned int param_size)
+{
+	struct qla_tgt_sess_work_param *prm;
+	unsigned long flags;
+
+	prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
+	if (!prm ) {
+		printk(KERN_ERR "qla_target(%d): Unable to create session "
+			"work, command will be refused", 0);
+		return -ENOMEM;
+	}
+
+	DEBUG22(qla_printk(KERN_INFO, tgt->vha->hw, "Scheduling work (type %d, prm %p)"
+		" to find session for param %p (size %d, tgt %p)\n", type, prm, param,
+		param_size, tgt));
+
+	BUG_ON(param_size > (sizeof(*prm) -
+		offsetof(struct qla_tgt_sess_work_param, cmd)));
+
+	prm->type = type;
+	memcpy(&prm->cmd, param, param_size);
+
+	spin_lock_irqsave(&tgt->sess_work_lock, flags);
+	if (!tgt->sess_works_pending)
+		tgt->tm_to_unknown = 0;
+	list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
+	tgt->sess_works_pending = 1;
+	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
+
+	schedule_work(&tgt->sess_work);
+
+	return 0;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qla_tgt_modify_command_count(struct scsi_qla_host *vha, int cmd_count,
+	int imm_count)
+{
+	struct qla_hw_data *ha = vha->hw;
+	modify_lun_entry_t *pkt;
+
+	printk(KERN_INFO "Sending MODIFY_LUN (ha=%p, cmd=%d, imm=%d)\n",
+		  ha, cmd_count, imm_count);
+
+	/* Sending marker isn't necessary, since we called from ISR */
+
+	pkt = (modify_lun_entry_t *)qla2x00_req_pkt(vha);
+	if (!pkt) {
+		printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate "
+			"request packet\n", vha->vp_idx, __func__);
+		return;
+	}
+
+	ha->qla_tgt->modify_lun_expected++;
+
+	pkt->entry_type = MODIFY_LUN_TYPE;
+	pkt->entry_count = 1;
+	if (cmd_count < 0) {
+		pkt->operators = MODIFY_LUN_CMD_SUB;	/* Subtract from command count */
+		pkt->command_count = -cmd_count;
+	} else if (cmd_count > 0) {
+		pkt->operators = MODIFY_LUN_CMD_ADD;	/* Add to command count */
+		pkt->command_count = cmd_count;
+	}
+
+	if (imm_count < 0) {
+		pkt->operators |= MODIFY_LUN_IMM_SUB;
+		pkt->immed_notify_count = -imm_count;
+	} else if (imm_count > 0) {
+		pkt->operators |= MODIFY_LUN_IMM_ADD;
+		pkt->immed_notify_count = imm_count;
+	}
+
+	pkt->timeout = 0;	/* Use default */
+
+	qla2x00_isp_cmd(vha, vha->req);
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qla2xxx_send_notify_ack(struct scsi_qla_host *vha, notify_entry_t *iocb,
+	uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
+	uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
+{
+	struct qla_hw_data *ha = vha->hw;
+	nack_entry_t *ntfy;
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "Sending NOTIFY_ACK (ha=%p)\n", ha));
+
+	/* Send marker if required */
+	if (qla_tgt_issue_marker(vha, 1) != QLA_SUCCESS)
+		return;
+
+	ntfy = (nack_entry_t *)qla2x00_req_pkt(vha);
+	if (!ntfy) {
+		printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate "
+			"request packet\n", vha->vp_idx, __func__);
+		return;
+	}
+
+	if (ha->qla_tgt != NULL)
+		ha->qla_tgt->notify_ack_expected++;
+
+	ntfy->entry_type = NOTIFY_ACK_TYPE;
+	ntfy->entry_count = 1;
+	SET_TARGET_ID(ha, ntfy->target, GET_TARGET_ID(ha, iocb));
+	ntfy->status = iocb->status;
+	ntfy->task_flags = iocb->task_flags;
+	ntfy->seq_id = iocb->seq_id;
+	/* Do not increment here, the chip isn't decrementing */
+	/* ntfy->flags = __constant_cpu_to_le16(NOTIFY_ACK_RES_COUNT); */
+	ntfy->flags |= cpu_to_le16(add_flags);
+	ntfy->srr_rx_id = iocb->srr_rx_id;
+	ntfy->srr_rel_offs = iocb->srr_rel_offs;
+	ntfy->srr_ui = iocb->srr_ui;
+	ntfy->srr_flags = cpu_to_le16(srr_flags);
+	ntfy->srr_reject_code = cpu_to_le16(srr_reject_code);
+	ntfy->srr_reject_code_expl = srr_explan;
+	ntfy->ox_id = iocb->ox_id;
+
+	if (resp_code_valid) {
+		ntfy->resp_code = cpu_to_le16(resp_code);
+		ntfy->flags |= __constant_cpu_to_le16(
+			NOTIFY_ACK_TM_RESP_CODE_VALID);
+	}
+
+	DEBUG23(qla_printk(KERN_INFO, ha, "qla_target(%d): Sending Notify Ack"
+		" Seq %#x -> I %#x St %#x RC %#x\n", vha->vp_idx,
+		le16_to_cpu(iocb->seq_id), GET_TARGET_ID(ha, iocb),
+		le16_to_cpu(iocb->status), le16_to_cpu(ntfy->resp_code)));
+
+	qla2x00_isp_cmd(vha, vha->req);
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qla24xx_send_abts_resp(struct scsi_qla_host *vha,
+	const abts24_recv_entry_t *abts, uint32_t status, bool ids_reversed)
+{
+	struct qla_hw_data *ha = vha->hw;
+	abts24_resp_entry_t *resp;
+	uint32_t f_ctl;
+	uint8_t *p;
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "Sending task mgmt ABTS response"
+		" (ha=%p, atio=%p, status=%x\n", ha, abts, status));
+
+	/* Send marker if required */
+	if (qla_tgt_issue_marker(vha, 1) != QLA_SUCCESS)
+		return;
+
+	resp = (abts24_resp_entry_t *)qla2x00_req_pkt(vha);
+	if (!resp) {
+		printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate "
+			"request packet", vha->vp_idx, __func__);
+		return;
+	}
+
+	resp->entry_type = ABTS_RESP_24XX;
+	resp->entry_count = 1;
+	resp->nport_handle = abts->nport_handle;
+	resp->vp_index = vha->vp_idx;
+	resp->sof_type = abts->sof_type;
+	resp->exchange_address = abts->exchange_address;
+	resp->fcp_hdr_le = abts->fcp_hdr_le;
+	f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
+			F_CTL_LAST_SEQ | F_CTL_END_SEQ |
+			F_CTL_SEQ_INITIATIVE);
+	p = (uint8_t *)&f_ctl;
+	resp->fcp_hdr_le.f_ctl[0] = *p++;
+	resp->fcp_hdr_le.f_ctl[1] = *p++;
+	resp->fcp_hdr_le.f_ctl[2] = *p;
+	if (ids_reversed) {
+		resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
+		resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
+		resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
+		resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
+		resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
+		resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
+	} else {
+		resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
+		resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
+		resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
+		resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
+		resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
+		resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
+	}
+	resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
+	if (status == FCP_TMF_CMPL) {
+		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
+		resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
+		resp->payload.ba_acct.low_seq_cnt = 0x0000;
+		resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
+		resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
+		resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
+	} else {
+		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
+		resp->payload.ba_rjt.reason_code =
+			BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
+		/* Other bytes are zero */
+	}
+
+	ha->qla_tgt->abts_resp_expected++;
+
+	qla2x00_isp_cmd(vha, vha->req);
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qla24xx_retry_term_exchange(struct scsi_qla_host *vha,
+	abts24_resp_fw_entry_t *entry)
+{
+	ctio7_status1_entry_t *ctio;
+
+	DEBUG21(qla_printk(KERN_INFO, vha->hw, "Sending retry TERM EXCH CTIO7"
+			" (ha=%p)\n", vha->hw));
+	/* Send marker if required */
+	if (qla_tgt_issue_marker(vha, 1) != QLA_SUCCESS)
+		return;
+
+	ctio = (ctio7_status1_entry_t *)qla2x00_req_pkt(vha);
+	if (ctio == NULL) {
+		printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate "
+			"request packet\n", vha->vp_idx, __func__);
+		return;
+	}
+
+	/*
+	 * We've got on entrance firmware's response on by us generated
+	 * ABTS response. So, in it ID fields are reversed.
+	 */
+
+	ctio->common.entry_type = CTIO_TYPE7;
+	ctio->common.entry_count = 1;
+	ctio->common.nport_handle = entry->nport_handle;
+	ctio->common.handle = QLA_TGT_SKIP_HANDLE |	CTIO_COMPLETION_HANDLE_MARK;
+	ctio->common.timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
+	ctio->common.vp_index = vha->vp_idx;
+	ctio->common.initiator_id[0] = entry->fcp_hdr_le.d_id[0];
+	ctio->common.initiator_id[1] = entry->fcp_hdr_le.d_id[1];
+	ctio->common.initiator_id[2] = entry->fcp_hdr_le.d_id[2];
+	ctio->common.exchange_addr = entry->exchange_addr_to_abort;
+	ctio->flags = __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
+	ctio->ox_id = entry->fcp_hdr_le.ox_id;
+
+	qla2x00_isp_cmd(vha, vha->req);
+
+	qla24xx_send_abts_resp(vha, (abts24_recv_entry_t *)entry,
+		FCP_TMF_CMPL, true);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int __qla24xx_handle_abts(struct scsi_qla_host *vha, abts24_recv_entry_t *abts,
+	struct qla_tgt_sess *sess)
+{
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt_mgmt_cmd *mcmd;
+	int rc;
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "qla_target(%d): task abort (tag=%d)\n",
+		vha->vp_idx, abts->exchange_addr_to_abort));
+
+	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
+	if (mcmd == NULL) {
+		printk(KERN_ERR "qla_target(%d): %s: Allocation of ABORT cmd failed",
+			vha->vp_idx, __func__);
+		return -ENOMEM;
+	}
+	memset(mcmd, 0, sizeof(*mcmd));
+
+	mcmd->sess = sess;
+	memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
+
+	rc = ha->qla2x_tmpl->handle_tmr(mcmd, 0, ABORT_TASK);
+	if (rc != 0) {
+		printk(KERN_ERR "qla_target(%d):  qla2x_tmpl->handle_tmr()"
+				" failed: %d", vha->vp_idx, rc);
+		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
+		return -EFAULT;
+	}
+
+	return 0;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qla24xx_handle_abts(struct scsi_qla_host *vha, abts24_recv_entry_t *abts)
+{
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt_sess *sess;
+	uint32_t tag = abts->exchange_addr_to_abort, s_id;
+	int rc;
+
+	if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
+		printk(KERN_ERR "qla_target(%d): ABTS: Abort Sequence not "
+			"supported\n", vha->vp_idx);
+		qla24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
+		return;
+	}
+
+	if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
+		DEBUG22(qla_printk(KERN_INFO, ha, "qla_target(%d): ABTS: Unknown Exchange "
+			"Address received\n", vha->vp_idx));
+		qla24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
+		return;
+	}
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "qla_target(%d): task abort (s_id=%x:%x:%x, "
+		"tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
+		abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
+		le32_to_cpu(abts->fcp_hdr_le.parameter)));
+
+	memset(&s_id, 0, 3);
+	s_id = (abts->fcp_hdr_le.s_id[0] << 16) | (abts->fcp_hdr_le.s_id[1] << 8) |
+		abts->fcp_hdr_le.s_id[2];
+
+	sess = ha->qla2x_tmpl->find_sess_by_s_id(vha, (unsigned char *)&s_id);
+	if (!sess) {
+		DEBUG22(qla_printk(KERN_INFO, ha, "qla_target(%d): task abort for"
+			" non-existant session\n", vha->vp_idx));
+		rc = qla_tgt_sched_sess_work(ha->qla_tgt, QLA_TGT_SESS_WORK_ABORT,
+					abts, sizeof(*abts));
+		if (rc != 0) {
+			ha->qla_tgt->tm_to_unknown = 1;
+			qla24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
+		}
+		return;
+	}
+
+	rc = __qla24xx_handle_abts(vha, abts, sess);
+	if (rc != 0) {
+		printk(KERN_ERR "qla_target(%d): __qla24xx_handle_abts() failed: %d\n",
+			    vha->vp_idx, rc);
+		qla24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
+		return;
+	}
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qla24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
+	struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
+{
+	const atio7_entry_t *atio = &mcmd->orig_iocb.atio7;
+	ctio7_status1_entry_t *ctio;
+
+	DEBUG21(qla_printk(KERN_INFO, ha->hw, "Sending task mgmt CTIO7 (ha=%p,"
+		" atio=%p, resp_code=%x\n", ha, atio, resp_code));
+
+	/* Send marker if required */
+	if (qla_tgt_issue_marker(ha, 1) != QLA_SUCCESS)
+		return;
+
+	ctio = (ctio7_status1_entry_t *)qla2x00_req_pkt(ha);
+	if (ctio == NULL) {
+		printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate "
+			"request packet\n", ha->vp_idx, __func__);
+		return;
+	}
+
+	ctio->common.entry_type = CTIO_TYPE7;
+	ctio->common.entry_count = 1;
+	ctio->common.handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
+	ctio->common.nport_handle = mcmd->sess->loop_id;
+	ctio->common.timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
+	ctio->common.vp_index = ha->vp_idx;
+	ctio->common.initiator_id[0] = atio->fcp_hdr.s_id[2];
+	ctio->common.initiator_id[1] = atio->fcp_hdr.s_id[1];
+	ctio->common.initiator_id[2] = atio->fcp_hdr.s_id[0];
+	ctio->common.exchange_addr = atio->exchange_addr;
+	ctio->flags = (atio->attr << 9) | __constant_cpu_to_le16(
+		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
+	ctio->ox_id = swab16(atio->fcp_hdr.ox_id);
+	ctio->scsi_status = __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
+	ctio->response_len = __constant_cpu_to_le16(8);
+	((uint32_t *)ctio->sense_data)[0] = cpu_to_be32(resp_code);
+
+	qla2x00_isp_cmd(ha, ha->req);
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qla24xx_send_notify_ack(struct scsi_qla_host *vha,
+	notify24xx_entry_t *iocb, uint16_t srr_flags,
+	uint8_t srr_reject_code, uint8_t srr_explan)
+{
+	struct qla_hw_data *ha = vha->hw;
+	nack24xx_entry_t *nack;
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "Sending NOTIFY_ACK24 (ha=%p)\n", ha));
+
+	/* Send marker if required */
+	if (qla_tgt_issue_marker(vha, 1) != QLA_SUCCESS)
+		return;
+
+	if (ha->qla_tgt != NULL)
+		ha->qla_tgt->notify_ack_expected++;
+
+	nack = (nack24xx_entry_t *)qla2x00_req_pkt(vha);
+	if (!nack) {
+		printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate "
+			"request packet\n", vha->vp_idx, __func__);
+		return;
+	}
+
+	nack->entry_type = NOTIFY_ACK_TYPE;
+	nack->entry_count = 1;
+	nack->nport_handle = iocb->nport_handle;
+	if (le16_to_cpu(iocb->status) == IMM_NTFY_ELS) {
+		nack->flags = iocb->flags &
+			__constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
+	}
+	nack->srr_rx_id = iocb->srr_rx_id;
+	nack->status = iocb->status;
+	nack->status_subcode = iocb->status_subcode;
+	nack->exchange_address = iocb->exchange_address;
+	nack->srr_rel_offs = iocb->srr_rel_offs;
+	nack->srr_ui = iocb->srr_ui;
+	nack->srr_flags = cpu_to_le16(srr_flags);
+	nack->srr_reject_code = srr_reject_code;
+	nack->srr_reject_code_expl = srr_explan;
+	nack->ox_id = iocb->ox_id;
+	nack->vp_index = iocb->vp_index;
+
+	DEBUG23(qla_printk(KERN_INFO, ha, "qla_target(%d): Sending 24xx Notify Ack %d\n",
+		vha->vp_idx, nack->status));
+
+	qla2x00_isp_cmd(vha, vha->req);
+}
+
+void qla_tgt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
+{
+	mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
+}
+EXPORT_SYMBOL(qla_tgt_free_mcmd);
+
+/* callback from target fabric module code */
+void qla_tgt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
+{
+	struct scsi_qla_host *vha;
+	struct qla_hw_data *ha;
+	unsigned long flags;
+
+	DEBUG22(qla_printk(KERN_INFO, mcmd->sess->vha->hw, "TM response mcmd"
+		" (%p) status %#x state %#x", mcmd, mcmd->se_tmr_req->response,
+		mcmd->flags));
+
+	vha = mcmd->sess->vha;
+	ha = vha->hw;
+
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	if (IS_FWI2_CAPABLE(ha)) {
+		if (mcmd->flags == Q24_MGMT_SEND_NACK) {
+			qla24xx_send_notify_ack(vha,
+				&mcmd->orig_iocb.notify_entry24, 0, 0, 0);
+		} else {
+			if (mcmd->se_tmr_req->function == ABORT_TASK)
+				qla24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
+					mcmd->fc_tm_rsp, false);
+			else
+				qla24xx_send_task_mgmt_ctio(vha, mcmd, mcmd->fc_tm_rsp);
+		}
+	} else {
+		qla2xxx_send_notify_ack(vha, &mcmd->orig_iocb.notify_entry, 0,
+			mcmd->fc_tm_rsp, 1, 0, 0, 0);
+	}
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+}
+EXPORT_SYMBOL(qla_tgt_xmit_tm_rsp);
+
+/* No locks */
+static int qla_tgt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
+{
+	BUG_ON(prm->cmd->sg_cnt == 0);
+
+	prm->sg = (struct scatterlist *)prm->cmd->sg;
+	prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, prm->cmd->sg,
+		prm->cmd->sg_cnt, prm->cmd->dma_data_direction);
+	if (unlikely(prm->seg_cnt == 0))
+		goto out_err;
+
+	prm->cmd->sg_mapped = 1;
+
+	/*
+	 * If greater than four sg entries then we need to allocate
+	 * the continuation entries
+	 */
+	if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) {
+		prm->req_cnt += (uint16_t)(prm->seg_cnt -
+				prm->tgt->datasegs_per_cmd) /
+				prm->tgt->datasegs_per_cont;
+		if (((uint16_t)(prm->seg_cnt - prm->tgt->datasegs_per_cmd)) %
+		    prm->tgt->datasegs_per_cont)
+			prm->req_cnt++;
+	}
+
+	DEBUG21(qla_printk(KERN_INFO, prm->cmd->vha->hw, "seg_cnt=%d, req_cnt=%d\n",
+			prm->seg_cnt, prm->req_cnt));
+	return 0;
+
+out_err:
+	printk(KERN_ERR "qla_target(%d): PCI mapping failed: sg_cnt=%d",
+		0, prm->cmd->sg_cnt);
+	return -1;
+}
+
+static inline void qla_tgt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
+{
+	struct qla_hw_data *ha = vha->hw;
+
+	BUG_ON(!cmd->sg_mapped);
+	pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
+	cmd->sg_mapped = 0;
+}
+
+static int qla_tgt_check_reserve_free_req(struct scsi_qla_host *vha, uint32_t req_cnt)
+{
+	struct qla_hw_data *ha = vha->hw;
+	device_reg_t __iomem *reg = ha->iobase;
+	uint32_t cnt;
+
+	if (vha->req->cnt < (req_cnt + 2)) {
+		if (IS_FWI2_CAPABLE(ha))
+			cnt = (uint16_t)RD_REG_DWORD(
+				    &reg->isp24.req_q_out);
+		else
+			cnt = qla2x00_debounce_register(
+				    ISP_REQ_Q_OUT(ha, &reg->isp));
+		DEBUG21(qla_printk(KERN_INFO, ha, "Request ring circled: cnt=%d, "
+			"vha->->ring_index=%d, vha->req->cnt=%d, req_cnt=%d\n",
+			cnt, vha->req->ring_index, vha->req->cnt, req_cnt));
+		if  (vha->req->ring_index < cnt)
+			vha->req->cnt = cnt - vha->req->ring_index;
+		else
+			vha->req->cnt = vha->req->length -
+			    (vha->req->ring_index - cnt);
+	}
+
+	if (unlikely(vha->req->cnt < (req_cnt + 2))) {
+		printk(KERN_INFO "qla_target(%d): There is no room in the "
+			"request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
+			"req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
+			vha->req->cnt, req_cnt);
+		return -ENOMEM;
+	}
+	vha->req->cnt -= req_cnt;
+
+	return 0;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static inline void *qla_tgt_get_req_pkt(struct scsi_qla_host *vha)
+{
+	/* Adjust ring index. */
+	vha->req->ring_index++;
+	if (vha->req->ring_index == vha->req->length) {
+		vha->req->ring_index = 0;
+		vha->req->ring_ptr = vha->req->ring;
+	} else {
+		vha->req->ring_ptr++;
+	}
+	return (cont_entry_t *)vha->req->ring_ptr;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static inline uint32_t qla_tgt_make_handle(struct scsi_qla_host *vha)
+{
+	struct qla_hw_data *ha = vha->hw;
+	uint32_t h;
+
+	h = ha->current_handle;
+	/* always increment cmd handle */
+	do {
+		++h;
+		if (h > MAX_OUTSTANDING_COMMANDS)
+			h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
+		if (h == ha->current_handle) {
+			printk(KERN_INFO "qla_target(%d): Ran out of "
+				"empty cmd slots in ha %p\n", vha->vp_idx, ha);
+			h = QLA_TGT_NULL_HANDLE;
+			break;
+		}
+	} while ((h == QLA_TGT_NULL_HANDLE) ||
+		 (h == QLA_TGT_SKIP_HANDLE) ||
+		 (ha->cmds[h-1] != NULL));
+
+	if (h != QLA_TGT_NULL_HANDLE)
+		ha->current_handle = h;
+
+	return h;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static void qla2xxx_build_ctio_pkt(struct qla_tgt_prm *prm, struct scsi_qla_host *vha)
+{
+	uint32_t h;
+	ctio_entry_t *pkt;
+	struct qla_hw_data *ha = vha->hw;
+
+	pkt = (ctio_entry_t *)vha->req->ring_ptr;
+	prm->pkt = pkt;
+	memset(pkt, 0, sizeof(*pkt));
+
+	if (prm->tgt->tgt_enable_64bit_addr)
+		pkt->common.entry_type = CTIO_A64_TYPE;
+	else
+		pkt->common.entry_type = CONTINUE_TGT_IO_TYPE;
+
+	pkt->common.entry_count = (uint8_t)prm->req_cnt;
+
+	h = qla_tgt_make_handle(vha);
+	if (h != QLA_TGT_NULL_HANDLE)
+		ha->cmds[h-1] = prm->cmd;
+
+	pkt->common.handle = h | CTIO_COMPLETION_HANDLE_MARK;
+	pkt->common.timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
+
+	/* Set initiator ID */
+	h = GET_TARGET_ID(ha, &prm->cmd->atio.atio2x);
+	SET_TARGET_ID(ha, pkt->common.target, h);
+
+	pkt->common.rx_id = prm->cmd->atio.atio2x.rx_id;
+	pkt->common.relative_offset = cpu_to_le32(prm->cmd->offset);
+
+	DEBUG23(qla_printk(KERN_INFO, ha, "qla_target(%d): handle(se_cmd) -> %08x, "
+		"timeout %d L %#x -> I %#x E %#x\n", vha->vp_idx,
+		pkt->common.handle, QLA_TGT_TIMEOUT,
+		le16_to_cpu(prm->cmd->atio.atio2x.lun),
+		GET_TARGET_ID(ha, &pkt->common), pkt->common.rx_id));
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qla24xx_build_ctio_pkt(struct qla_tgt_prm *prm, struct scsi_qla_host *vha)
+{
+	uint32_t h;
+	ctio7_status0_entry_t *pkt;
+	struct qla_hw_data *ha = vha->hw;
+	atio7_entry_t *atio = &prm->cmd->atio.atio7;
+
+	pkt = (ctio7_status0_entry_t *)vha->req->ring_ptr;
+	prm->pkt = pkt;
+	memset(pkt, 0, sizeof(*pkt));
+
+	pkt->common.entry_type = CTIO_TYPE7;
+	pkt->common.entry_count = (uint8_t)prm->req_cnt;
+	pkt->common.vp_index = vha->vp_idx;
+
+	h = qla_tgt_make_handle(vha);
+	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
+		/*
+		 * CTIO type 7 from the firmware doesn't provide a way to
+		 * know the initiator's LOOP ID, hence we can't find
+		 * the session and, so, the command.
+		 */
+		dump_stack();
+		return -ENOMEM;
+	} else
+		ha->cmds[h-1] = prm->cmd;
+
+	pkt->common.handle = h | CTIO_COMPLETION_HANDLE_MARK;
+	pkt->common.nport_handle = prm->cmd->loop_id;
+	pkt->common.timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
+	pkt->common.initiator_id[0] = atio->fcp_hdr.s_id[2];
+	pkt->common.initiator_id[1] = atio->fcp_hdr.s_id[1];
+	pkt->common.initiator_id[2] = atio->fcp_hdr.s_id[0];
+	pkt->common.exchange_addr = atio->exchange_addr;
+	pkt->flags |= (atio->attr << 9);
+	pkt->ox_id = swab16(atio->fcp_hdr.ox_id);
+	pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
+
+	DEBUG23(qla_printk(KERN_INFO, ha, "qla_target(%d): handle(cmd) -> %08x, "
+		"timeout %d, ox_id %#x\n", vha->vp_idx, pkt->common.handle,
+		QLA_TGT_TIMEOUT, le16_to_cpu(pkt->ox_id)));
+	return 0;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. We have already made sure
+ * that there is sufficient amount of request entries to not drop it.
+ */
+static void qla_tgt_load_cont_data_segments(struct qla_tgt_prm *prm, struct scsi_qla_host *vha)
+{
+	int cnt;
+	uint32_t *dword_ptr;
+	int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
+
+	/* Build continuation packets */
+	while (prm->seg_cnt > 0) {
+		cont_a64_entry_t *cont_pkt64 =
+			(cont_a64_entry_t *)qla_tgt_get_req_pkt(vha);
+
+		/*
+		 * Make sure that from cont_pkt64 none of
+		 * 64-bit specific fields used for 32-bit
+		 * addressing. Cast to (cont_entry_t *) for
+		 * that.
+		 */
+
+		memset(cont_pkt64, 0, sizeof(*cont_pkt64));
+
+		cont_pkt64->entry_count = 1;
+		cont_pkt64->sys_define = 0;
+
+		if (enable_64bit_addressing) {
+			cont_pkt64->entry_type = CONTINUE_A64_TYPE;
+			dword_ptr =
+			    (uint32_t *)&cont_pkt64->dseg_0_address;
+		} else {
+			cont_pkt64->entry_type = CONTINUE_TYPE;
+			dword_ptr =
+			    (uint32_t *)&((cont_entry_t *)
+					    cont_pkt64)->dseg_0_address;
+		}
+
+		/* Load continuation entry data segments */
+		for (cnt = 0;
+		     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
+		     cnt++, prm->seg_cnt--) {
+			*dword_ptr++ =
+			    cpu_to_le32(pci_dma_lo32
+					(sg_dma_address(prm->sg)));
+			if (enable_64bit_addressing) {
+				*dword_ptr++ =
+				    cpu_to_le32(pci_dma_hi32
+						(sg_dma_address
+						 (prm->sg)));
+			}
+			*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
+
+			DEBUG24(qla_printk(KERN_INFO, vha->hw, "S/G Segment Cont. phys_addr=%llx:%llx, len=%d",
+			      (long long unsigned int)pci_dma_hi32(sg_dma_address(prm->sg)),
+			      (long long unsigned int)pci_dma_lo32(sg_dma_address(prm->sg)),
+			      (int)sg_dma_len(prm->sg)));
+
+			prm->sg++;
+		}
+	}
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. We have already made sure
+ * that there is sufficient amount of request entries to not drop it.
+ */
+static void qla2xxx_load_data_segments(struct qla_tgt_prm *prm, struct scsi_qla_host *vha)
+{
+	int cnt;
+	uint32_t *dword_ptr;
+	int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
+	ctio_common_entry_t *pkt = (ctio_common_entry_t *)prm->pkt;
+
+	DEBUG23(qla_printk(KERN_INFO, vha->hw, "iocb->scsi_status=%x, iocb->flags=%x\n",
+	      le16_to_cpu(pkt->scsi_status), le16_to_cpu(pkt->flags)));
+
+	pkt->transfer_length = cpu_to_le32(prm->cmd->bufflen);
+
+	/* Setup packet address segment pointer */
+	dword_ptr = pkt->dseg_0_address;
+
+	if (prm->seg_cnt == 0) {
+		/* No data transfer */
+		*dword_ptr++ = 0;
+		*dword_ptr = 0;
+		return;
+	}
+
+	/* Set total data segment count */
+	pkt->dseg_count = cpu_to_le16(prm->seg_cnt);
+
+	/* If scatter gather */
+	DEBUG24(qla_printk(KERN_INFO, vha->hw, "%s", "Building S/G data segments..."));
+	/* Load command entry data segments */
+	for (cnt = 0;
+	     (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
+	     cnt++, prm->seg_cnt--) {
+		*dword_ptr++ =
+		    cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
+		if (enable_64bit_addressing) {
+			*dword_ptr++ =
+			    cpu_to_le32(pci_dma_hi32
+					(sg_dma_address(prm->sg)));
+		}
+		*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
+
+		DEBUG24(qla_printk(KERN_INFO, vha->hw, "S/G Segment phys_addr=%llx:%llx, len=%d\n",
+		      (long long unsigned int)pci_dma_hi32(sg_dma_address(prm->sg)),
+		      (long long unsigned int)pci_dma_lo32(sg_dma_address(prm->sg)),
+		      (int)sg_dma_len(prm->sg)));
+
+		prm->sg++;
+	}
+
+	qla_tgt_load_cont_data_segments(prm, vha);
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. We have already made sure
+ * that there is sufficient amount of request entries to not drop it.
+ */
+static void qla24xx_load_data_segments(struct qla_tgt_prm *prm, struct scsi_qla_host *vha)
+{
+	int cnt;
+	uint32_t *dword_ptr;
+	int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
+	ctio7_status0_entry_t *pkt = (ctio7_status0_entry_t *)prm->pkt;
+
+	DEBUG21(qla_printk(KERN_INFO, vha->hw, "iocb->scsi_status=%x, iocb->flags=%x\n",
+	      le16_to_cpu(pkt->scsi_status), le16_to_cpu(pkt->flags)));
+
+	pkt->transfer_length = cpu_to_le32(prm->cmd->bufflen);
+
+	/* Setup packet address segment pointer */
+	dword_ptr = pkt->dseg_0_address;
+
+	if (prm->seg_cnt == 0) {
+		/* No data transfer */
+		*dword_ptr++ = 0;
+		*dword_ptr = 0;
+		return;
+	}
+
+	/* Set total data segment count */
+	pkt->common.dseg_count = cpu_to_le16(prm->seg_cnt);
+
+	/* If scatter gather */
+	DEBUG24(qla_printk(KERN_INFO, vha->hw, "%s", "Building S/G data segments..."));
+	/* Load command entry data segments */
+	for (cnt = 0;
+	     (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
+	     cnt++, prm->seg_cnt--) {
+		*dword_ptr++ =
+		    cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
+		if (enable_64bit_addressing) {
+			*dword_ptr++ =
+			    cpu_to_le32(pci_dma_hi32(
+					sg_dma_address(prm->sg)));
+		}
+		*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
+
+		DEBUG24(qla_printk(KERN_INFO, vha->hw, "S/G Segment phys_addr=%llx:%llx, len=%d\n",
+		      (long long unsigned int)pci_dma_hi32(sg_dma_address(
+								prm->sg)),
+		      (long long unsigned int)pci_dma_lo32(sg_dma_address(
+								prm->sg)),
+		      (int)sg_dma_len(prm->sg)));
+
+		prm->sg++;
+	}
+
+	qla_tgt_load_cont_data_segments(prm, vha);
+}
+
+static inline int qla_tgt_has_data(struct qla_tgt_cmd *cmd)
+{
+	return cmd->bufflen > 0;
+}
+
+/*
+ * Called without ha->hardware_lock held
+ */
+static int qla_tgt_pre_xmit_response(struct qla_tgt_cmd *cmd, struct qla_tgt_prm *prm,
+			int xmit_type, uint8_t scsi_status, uint32_t *full_req_cnt)
+{
+	struct qla_tgt *tgt = cmd->tgt;
+	struct scsi_qla_host *vha = tgt->vha;
+	struct qla_hw_data *ha = vha->hw;
+	struct se_cmd *se_cmd = &cmd->se_cmd;
+
+	if (unlikely(cmd->aborted)) {
+		DEBUG22(qla_printk(KERN_INFO, ha, "qla_target(%d): terminating exchange "
+			"for aborted cmd=%p (se_cmd=%p, tag=%d)",
+			vha->vp_idx, cmd, se_cmd, cmd->tag));
+
+		cmd->state = QLA_TGT_STATE_ABORTED;
+
+		if (IS_FWI2_CAPABLE(ha))
+			qla24xx_send_term_exchange(vha, cmd, &cmd->atio.atio7, 0);
+		else
+			qla2xxx_send_term_exchange(vha, cmd, &cmd->atio.atio2x, 0);
+		/* !! At this point cmd could be already freed !! */
+		return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
+	}
+
+	DEBUG23(qla_printk(KERN_INFO, ha, "qla_target(%d): tag=%u\n", vha->vp_idx, cmd->tag));
+
+	prm->cmd = cmd;
+	prm->tgt = tgt;
+	prm->rq_result = scsi_status;
+	prm->sense_buffer = &cmd->sense_buffer[0];
+	prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
+	prm->sg = NULL;
+	prm->seg_cnt = -1;
+	prm->req_cnt = 1;
+	prm->add_status_pkt = 0;
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "rq_result=%x, xmit_type=%x\n",
+				prm->rq_result, xmit_type));
+
+	/* Send marker if required */
+	if (qla_tgt_issue_marker(vha, 0) != QLA_SUCCESS)
+		return -EFAULT;
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "CTIO start: vha(%d)\n", vha->vp_idx));
+
+	if ((xmit_type & QLA_TGT_XMIT_DATA) && qla_tgt_has_data(cmd)) {
+		if  (qla_tgt_pci_map_calc_cnt(prm) != 0)
+			return -EAGAIN;
+	}
+
+	*full_req_cnt = prm->req_cnt;
+
+	if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
+		prm->residual = se_cmd->residual_count;
+		DEBUG21(qla_printk(KERN_INFO, ha, "Residual underflow: %d (tag %d, "
+			"op %x, bufflen %d, rq_result %x)\n",
+			prm->residual, cmd->tag,
+			T_TASK(se_cmd)->t_task_cdb[0], cmd->bufflen,
+			prm->rq_result));
+		prm->rq_result |= SS_RESIDUAL_UNDER;
+	} else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
+		prm->residual = se_cmd->residual_count;
+		DEBUG21(qla_printk(KERN_INFO, ha, "Residual overflow: %d (tag %d, "
+			"op %x, bufflen %d, rq_result %x)\n",
+			prm->residual, cmd->tag,
+			T_TASK(se_cmd)->t_task_cdb[0], cmd->bufflen,
+			prm->rq_result));
+		prm->rq_result |= SS_RESIDUAL_OVER;
+		prm->residual = -prm->residual;
+	}
+
+	if (xmit_type & QLA_TGT_XMIT_STATUS) {
+		/*
+		 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be ignored
+		 * in *xmit_response() below
+		 */
+		if (qla_tgt_has_data(cmd)) {
+			if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
+			    (IS_FWI2_CAPABLE(ha) &&
+			     (prm->rq_result != 0))) {
+				prm->add_status_pkt = 1;
+				(*full_req_cnt)++;
+			}
+		}
+	}
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "req_cnt=%d, full_req_cnt=%d,"
+		" add_status_pkt=%d\n", prm->req_cnt, *full_req_cnt,
+		prm->add_status_pkt));
+
+	return 0;
+}
+
+static inline int qla_tgt_need_explicit_conf(struct qla_hw_data *ha,
+	struct qla_tgt_cmd *cmd, int sending_sense)
+{
+	if (ha->enable_class_2)
+		return 0;
+
+	if (sending_sense)
+		return cmd->conf_compl_supported;
+	else
+		return ha->enable_explicit_conf && cmd->conf_compl_supported;
+}
+
+static void qla_tgt_init_ctio_ret_entry(ctio_ret_entry_t *ctio_m1,
+	struct qla_tgt_prm *prm, struct scsi_qla_host *vha)
+{
+	struct qla_hw_data *ha = vha->hw;
+
+	prm->sense_buffer_len = min((uint32_t)prm->sense_buffer_len,
+				    (uint32_t)sizeof(ctio_m1->sense_data));
+
+	ctio_m1->flags = __constant_cpu_to_le16(OF_SSTS | OF_FAST_POST |
+				     OF_NO_DATA | OF_SS_MODE_1);
+	ctio_m1->flags |= __constant_cpu_to_le16(OF_INC_RC);
+	if (qla_tgt_need_explicit_conf(ha, prm->cmd, 0)) {
+		ctio_m1->flags |= __constant_cpu_to_le16(OF_EXPL_CONF |
+					OF_CONF_REQ);
+	}
+	ctio_m1->scsi_status = cpu_to_le16(prm->rq_result);
+	ctio_m1->residual = cpu_to_le32(prm->residual);
+	if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
+		if (qla_tgt_need_explicit_conf(ha, prm->cmd, 1)) {
+			ctio_m1->flags |= __constant_cpu_to_le16(OF_EXPL_CONF |
+						OF_CONF_REQ);
+		}
+		ctio_m1->scsi_status |= __constant_cpu_to_le16(
+						SS_SENSE_LEN_VALID);
+		ctio_m1->sense_length = cpu_to_le16(prm->sense_buffer_len);
+		memcpy(ctio_m1->sense_data, prm->sense_buffer,
+		       prm->sense_buffer_len);
+	} else {
+		memset(ctio_m1->sense_data, 0, sizeof(ctio_m1->sense_data));
+		ctio_m1->sense_length = 0;
+	}
+
+	/* Sense with len > 26, is it possible ??? */
+
+	return;
+}
+
+static int __qla2xxx_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, uint8_t scsi_status)
+{
+	struct scsi_qla_host *vha = cmd->vha;
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt_prm prm;
+	ctio_common_entry_t *pkt;
+	unsigned long flags = 0;
+	uint32_t full_req_cnt = 0;
+	int res;
+
+	memset(&prm, 0, sizeof(prm));
+
+	res = qla_tgt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, &full_req_cnt);
+	if (unlikely(res != 0)) {
+		if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
+			return 0;
+
+		return res;
+	}
+
+	if (cmd->locked_rsp)
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+
+	/* Does F/W have an IOCBs for this request */
+	res = qla_tgt_check_reserve_free_req(vha, full_req_cnt);
+	if (unlikely(res != 0) && (xmit_type & QLA_TGT_XMIT_DATA))
+		goto out_unmap_unlock;
+
+	qla2xxx_build_ctio_pkt(&prm, cmd->vha);
+	pkt = (ctio_common_entry_t *)prm.pkt;
+
+	if (qla_tgt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
+		pkt->flags |= __constant_cpu_to_le16(OF_FAST_POST | OF_DATA_IN);
+		pkt->flags |= __constant_cpu_to_le16(OF_INC_RC);
+
+		qla2xxx_load_data_segments(&prm, vha);
+
+		if (prm.add_status_pkt == 0) {
+			if (xmit_type & QLA_TGT_XMIT_STATUS) {
+				pkt->scsi_status = cpu_to_le16(prm.rq_result);
+				pkt->residual = cpu_to_le32(prm.residual);
+				pkt->flags |= __constant_cpu_to_le16(OF_SSTS);
+				if (qla_tgt_need_explicit_conf(ha, cmd, 0)) {
+					pkt->flags |= __constant_cpu_to_le16(
+							OF_EXPL_CONF |
+							OF_CONF_REQ);
+				}
+			}
+		} else {
+			/*
+			 * We have already made sure that there is sufficient
+			 * amount of request entries to not drop HW lock in
+			 * req_pkt().
+			 */
+			ctio_ret_entry_t *ctio_m1 =
+				(ctio_ret_entry_t *)qla_tgt_get_req_pkt(vha);
+
+			DEBUG21(qla_printk(KERN_INFO, ha, "%s", "Building"
+				" additional status packet"));
+
+			memcpy(ctio_m1, pkt, sizeof(*ctio_m1));
+			ctio_m1->entry_count = 1;
+			ctio_m1->dseg_count = 0;
+
+			/* Real finish is ctio_m1's finish */
+			pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
+			pkt->flags &= ~__constant_cpu_to_le16(OF_INC_RC);
+
+			qla_tgt_init_ctio_ret_entry(ctio_m1, &prm, cmd->vha);
+		}
+	} else
+		qla_tgt_init_ctio_ret_entry((ctio_ret_entry_t *)pkt,
+					&prm, cmd->vha);
+
+	cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "Xmitting CTIO7 response pkt for 2xxx:"
+			" %p scsi_status: 0x%02x\n", pkt, scsi_status));
+
+	qla2x00_isp_cmd(vha, vha->req);
+	if (cmd->locked_rsp)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	return 0;
+
+out_unmap_unlock:
+	if (cmd->sg_mapped)
+		qla_tgt_unmap_sg(vha, cmd);
+	if (cmd->locked_rsp)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	return res;
+}
+
+#ifdef CONFIG_QLA_TGT_DEBUG_SRR
+/*
+ *  Original taken from the XFS code
+ */
+static unsigned long qla_tgt_srr_random(void)
+{
+	static int Inited;
+	static unsigned long RandomValue;
+	static DEFINE_SPINLOCK(lock);
+	/* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
+	register long rv;
+	register long lo;
+	register long hi;
+	unsigned long flags;
+
+	spin_lock_irqsave(&lock, flags);
+	if (!Inited) {
+		RandomValue = jiffies;
+		Inited = 1;
+	}
+	rv = RandomValue;
+	hi = rv / 127773;
+	lo = rv % 127773;
+	rv = 16807 * lo - 2836 * hi;
+	if (rv <= 0)
+		rv += 2147483647;
+	RandomValue = rv;
+	spin_unlock_irqrestore(&lock, flags);
+	return rv;
+}
+
+static void qla_tgt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
+{
+#if 0 /* This is not a real status packets lost, so it won't lead to SRR */
+	if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qla_tgt_srr_random() % 200) == 50) {
+		*xmit_type &= ~QLA_TGT_XMIT_STATUS;
+		DEBUG22(qla_printk(KERN_INFO, "Dropping cmd %p (tag %d) status", cmd,
+			cmd->tag));
+	}
+#endif
+
+	if (qla_tgt_has_data(cmd) && (cmd->sg_cnt > 1) &&
+	    ((qla_tgt_srr_random() % 100) == 20)) {
+		int i, leave = 0;
+		unsigned int tot_len = 0;
+
+		while (leave == 0)
+			leave = qla_tgt_srr_random() % cmd->sg_cnt;
+
+		for (i = 0; i < leave; i++)
+			tot_len += cmd->sg[i].length;
+
+		DEBUG22(qla_printk(KERN_INFO, "Cutting cmd %p (tag %d) buffer tail to len %d, "
+			"sg_cnt %d (cmd->bufflen %d, cmd->sg_cnt %d)", cmd,
+			cmd->tag, tot_len, leave, cmd->bufflen, cmd->sg_cnt));
+
+		cmd->bufflen = tot_len;
+		cmd->sg_cnt = leave;
+	}
+
+	if (qla_tgt_has_data(cmd) && ((qla_tgt_srr_random() % 100) == 70)) {
+		unsigned int offset = qla_tgt_srr_random() % cmd->bufflen;
+
+		DEBUG22(qla_printk(KERN_INFO, "Cutting cmd %p (tag %d) buffer head "
+			"to offset %d (cmd->bufflen %d)", cmd, cmd->tag,
+			offset, cmd->bufflen));
+		if (offset == 0)
+			*xmit_type &= ~QLA_TGT_XMIT_DATA;
+		else if (qla_tgt_cut_cmd_data_head(cmd, offset)) {
+			DEBUG22(qla_printk(KERN_INFO, "qla_tgt_cut_cmd_data_head() failed (tag %d)",
+				cmd->tag));
+		}
+	}
+}
+#else
+static inline void qla_tgt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) {}
+#endif
+
+int qla2xxx_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, uint8_t scsi_status)
+{
+#if 0
+	qla_tgt_check_srr_debug(cmd, &xmit_type);
+#endif
+
+	DEBUG21(qla_printk(KERN_INFO, cmd->vha->hw, "is_send_status=%d,"
+		" cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d",
+		(xmit_type & QLA_TGT_XMIT_STATUS) ? 1 : 0, cmd->bufflen,
+		cmd->sg_cnt, cmd->dma_data_direction));
+
+	return (IS_FWI2_CAPABLE(cmd->tgt->ha)) ?
+		__qla24xx_xmit_response(cmd, xmit_type, scsi_status) :
+		__qla2xxx_xmit_response(cmd, xmit_type, scsi_status);
+}
+EXPORT_SYMBOL(qla2xxx_xmit_response);
+
+static void qla24xx_init_ctio_ret_entry(ctio7_status0_entry_t *ctio,
+	struct qla_tgt_prm *prm)
+{
+	ctio7_status1_entry_t *ctio1;
+
+	prm->sense_buffer_len = min((uint32_t)prm->sense_buffer_len,
+				    (uint32_t)sizeof(ctio1->sense_data));
+	ctio->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
+	if (qla_tgt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
+		ctio->flags |= __constant_cpu_to_le16(
+				CTIO7_FLAGS_EXPLICIT_CONFORM |
+				CTIO7_FLAGS_CONFORM_REQ);
+	}
+	ctio->residual = cpu_to_le32(prm->residual);
+	ctio->scsi_status = cpu_to_le16(prm->rq_result);
+	if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
+		int i;
+
+		ctio1 = (ctio7_status1_entry_t *)ctio;
+		if (qla_tgt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
+			ctio1->flags |= __constant_cpu_to_le16(
+				CTIO7_FLAGS_EXPLICIT_CONFORM |
+				CTIO7_FLAGS_CONFORM_REQ);
+		}
+		ctio1->flags &= ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
+		ctio1->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
+		ctio1->scsi_status |= __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
+		ctio1->sense_length = cpu_to_le16(prm->sense_buffer_len);
+		for (i = 0; i < prm->sense_buffer_len/4; i++)
+			((uint32_t *)ctio1->sense_data)[i] =
+				cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
+#if 0
+		if (unlikely((prm->sense_buffer_len % 4) != 0)) {
+			static int q;
+			if (q < 10) {
+				printk(KERN_INFO "qla_target(%d): %d bytes of sense "
+					"lost", prm->tgt->ha->vp_idx,
+					prm->sense_buffer_len % 4);
+				q++;
+			}
+		}
+#endif
+	} else {
+		ctio1 = (ctio7_status1_entry_t *)ctio;
+		ctio1->flags &= ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
+		ctio1->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
+		ctio1->sense_length = 0;
+		memset(ctio1->sense_data, 0, sizeof(ctio1->sense_data));
+	}
+
+	/* Sense with len > 24, is it possible ??? */
+}
+
+/*
+ * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * QLA_TGT_XMIT_STATUS
+ * for >= 24xx silicon
+ */
+static int __qla24xx_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, uint8_t scsi_status)
+{
+	struct scsi_qla_host *vha = cmd->vha;
+	struct qla_hw_data *ha = vha->hw;
+	ctio7_status0_entry_t *pkt;
+	struct qla_tgt_prm prm;
+	uint32_t full_req_cnt = 0;
+	unsigned long flags = 0;
+	int res;
+
+	memset(&prm, 0, sizeof(prm));
+
+	res = qla_tgt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, &full_req_cnt);
+	if (unlikely(res != 0)) {
+		if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
+			return 0;
+
+		return res;
+	}
+
+	if (cmd->locked_rsp)
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+
+        /* Does F/W have an IOCBs for this request */
+	res = qla_tgt_check_reserve_free_req(vha, full_req_cnt);
+	if (unlikely(res != 0) && (xmit_type & QLA_TGT_XMIT_DATA))
+		goto out_unmap_unlock;
+
+	res = qla24xx_build_ctio_pkt(&prm, vha);
+	if (unlikely(res != 0))
+		goto out_unmap_unlock;
+
+
+	pkt = (ctio7_status0_entry_t *)prm.pkt;
+
+	if (qla_tgt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
+		pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
+				CTIO7_FLAGS_STATUS_MODE_0);
+
+		qla24xx_load_data_segments(&prm, vha);
+
+		if (prm.add_status_pkt == 0) {
+			if (xmit_type & QLA_TGT_XMIT_STATUS) {
+				pkt->scsi_status = cpu_to_le16(prm.rq_result);
+				pkt->residual = cpu_to_le32(prm.residual);
+				pkt->flags |= __constant_cpu_to_le16(
+						CTIO7_FLAGS_SEND_STATUS);
+				if (qla_tgt_need_explicit_conf(ha, cmd, 0)) {
+					pkt->flags |= __constant_cpu_to_le16(
+						CTIO7_FLAGS_EXPLICIT_CONFORM |
+						CTIO7_FLAGS_CONFORM_REQ);
+				}
+			}
+
+		} else {
+			/*
+			 * We have already made sure that there is sufficient
+			 * amount of request entries to not drop HW lock in
+			 * req_pkt().
+			 */
+			ctio7_status1_entry_t *ctio =
+				(ctio7_status1_entry_t *)qla_tgt_get_req_pkt(vha);
+
+			DEBUG21(qla_printk(KERN_INFO, ha, "Building additional"
+					" status packet\n"));
+
+			memcpy(ctio, pkt, sizeof(*ctio));
+			ctio->common.entry_count = 1;
+			ctio->common.dseg_count = 0;
+			ctio->flags &= ~__constant_cpu_to_le16(
+						CTIO7_FLAGS_DATA_IN);
+
+			/* Real finish is ctio_m1's finish */
+			pkt->common.handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
+			pkt->flags |= __constant_cpu_to_le16(
+					CTIO7_FLAGS_DONT_RET_CTIO);
+			qla24xx_init_ctio_ret_entry((ctio7_status0_entry_t *)ctio,
+							&prm);
+			printk("Status CTIO7: %p\n", ctio);
+		}
+	} else
+		qla24xx_init_ctio_ret_entry(pkt, &prm);
+
+
+	cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "Xmitting CTIO7 response pkt for 24xx:"
+			" %p scsi_status: 0x%02x\n", pkt, scsi_status));
+
+	qla2x00_isp_cmd(vha, vha->req);
+	if (cmd->locked_rsp)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	return 0;
+
+out_unmap_unlock:
+	if (cmd->sg_mapped)
+		qla_tgt_unmap_sg(vha, cmd);
+	if (cmd->locked_rsp)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	return res;
+}
+
+int qla_tgt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
+{
+	struct scsi_qla_host *vha = cmd->vha;
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt *tgt = cmd->tgt;
+	struct qla_tgt_prm prm;
+	void *p;
+	unsigned long flags;
+	int res = 0;
+
+	memset(&prm, 0, sizeof(prm));
+	prm.cmd = cmd;
+	prm.tgt = tgt;
+	prm.sg = NULL;
+	prm.req_cnt = 1;
+
+	/* Send marker if required */
+	if (qla_tgt_issue_marker(vha, 0) != QLA_SUCCESS)
+		return -EIO;
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "CTIO_start: vha(%d)", (int)vha->vp_idx));
+
+	/* Calculate number of entries and segments required */
+	if (qla_tgt_pci_map_calc_cnt(&prm) != 0)
+		return -ENOMEM;
+
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+
+	/* Does F/W have an IOCBs for this request */
+	res = qla_tgt_check_reserve_free_req(vha, prm.req_cnt);
+	if (res != 0)
+		goto out_unlock_free_unmap;
+
+	if (IS_FWI2_CAPABLE(ha)) {
+		ctio7_status0_entry_t *pkt;
+		res = qla24xx_build_ctio_pkt(&prm, vha);
+		if (unlikely(res != 0))
+			goto out_unlock_free_unmap;
+		pkt = (ctio7_status0_entry_t *)prm.pkt;
+		pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
+				CTIO7_FLAGS_STATUS_MODE_0);
+		qla24xx_load_data_segments(&prm, vha);
+		p = pkt;
+	} else {
+		ctio_common_entry_t *pkt;
+		qla2xxx_build_ctio_pkt(&prm, vha);
+		pkt = (ctio_common_entry_t *)prm.pkt;
+		pkt->flags = __constant_cpu_to_le16(OF_FAST_POST | OF_DATA_OUT);
+		qla2xxx_load_data_segments(&prm, vha);
+		p = pkt;
+	}
+
+	cmd->state = QLA_TGT_STATE_NEED_DATA;
+
+	qla2x00_isp_cmd(vha, vha->req);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	return res;
+
+out_unlock_free_unmap:
+	if (cmd->sg_mapped)
+		qla_tgt_unmap_sg(vha, cmd);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	return res;
+}
+EXPORT_SYMBOL(qla_tgt_rdy_to_xfer);
+
+/* If hardware_lock held on entry, might drop it, then reaquire */
+static void qla2xxx_send_term_exchange(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
+	atio_entry_t *atio, int ha_locked)
+{
+	struct qla_hw_data *ha = vha->hw;
+	ctio_ret_entry_t *ctio;
+	unsigned long flags = 0; /* to stop compiler's warning */
+	int do_tgt_cmd_done = 0;
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "Sending TERM EXCH CTIO (ha=%p)\n", ha));
+
+	/* Send marker if required */
+	if (qla_tgt_issue_marker(vha, ha_locked) != QLA_SUCCESS)
+		return;
+
+	if (!ha_locked)
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+
+	ctio = (ctio_ret_entry_t *)qla2x00_req_pkt(vha);
+	if (ctio == NULL) {
+		printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate "
+			"request packet\n", vha->vp_idx, __func__);
+		goto out_unlock;
+	}
+
+	ctio->entry_type = CTIO_RET_TYPE;
+	ctio->entry_count = 1;
+	if (cmd != NULL) {
+		if (cmd->state < QLA_TGT_STATE_PROCESSED) {
+			printk(KERN_ERR "qla_target(%d): Terminating cmd %p with "
+				"incorrect state %d\n", vha->vp_idx, cmd,
+				cmd->state);
+		} else
+			do_tgt_cmd_done = 1;
+	}
+	ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
+
+	/* Set IDs */
+	SET_TARGET_ID(ha, ctio->target, GET_TARGET_ID(ha, atio));
+	ctio->rx_id = atio->rx_id;
+
+	/* Most likely, it isn't needed */
+	ctio->residual = atio->data_length;
+	if (ctio->residual != 0)
+		ctio->scsi_status |= SS_RESIDUAL_UNDER;
+
+	ctio->flags = __constant_cpu_to_le16(OF_FAST_POST | OF_TERM_EXCH |
+			OF_NO_DATA | OF_SS_MODE_1);
+	ctio->flags |= __constant_cpu_to_le16(OF_INC_RC);
+
+	qla2x00_isp_cmd(vha, vha->req);
+
+out_unlock:
+	if (!ha_locked)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	if (do_tgt_cmd_done) {
+		if (!ha_locked && !in_interrupt())
+			msleep(250); /* just in case */
+
+		ha->qla2x_tmpl->free_cmd(cmd);
+	}
+}
+
+/* If hardware_lock held on entry, might drop it, then reaquire */
+static void qla24xx_send_term_exchange(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
+	atio7_entry_t *atio, int ha_locked)
+{
+	struct qla_hw_data *ha = vha->hw;
+	ctio7_status1_entry_t *ctio;
+	unsigned long flags = 0; /* to stop compiler's warning */
+	int do_tgt_cmd_done = 0;
+
+	DEBUG21(qla_printk(KERN_INFO, ha, "Sending TERM EXCH CTIO7 (ha=%p)\n", ha));
+
+	/* Send marker if required */
+	if (qla_tgt_issue_marker(vha, ha_locked) != QLA_SUCCESS)
+		return;
+
+	if (!ha_locked)
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+
+	ctio = (ctio7_status1_entry_t *)qla2x00_req_pkt(vha);
+	if (ctio == NULL) {
+		printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate "
+			"request packet\n", vha->vp_idx, __func__);
+		goto out_unlock;
+	}
+
+	ctio->common.entry_type = CTIO_TYPE7;
+	ctio->common.entry_count = 1;
+	if (cmd != NULL) {
+		ctio->common.nport_handle = cmd->loop_id;
+		if (cmd->state < QLA_TGT_STATE_PROCESSED) {
+			printk(KERN_ERR "qla_target(%d): Terminating cmd %p with "
+				"incorrect state %d\n", vha->vp_idx, cmd,
+				 cmd->state);
+		} else
+			do_tgt_cmd_done = 1;
+	} else
+		ctio->common.nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
+	ctio->common.handle = QLA_TGT_SKIP_HANDLE |	CTIO_COMPLETION_HANDLE_MARK;
+	ctio->common.timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
+	ctio->common.vp_index = vha->vp_idx;
+	ctio->common.initiator_id[0] = atio->fcp_hdr.s_id[2];
+	ctio->common.initiator_id[1] = atio->fcp_hdr.s_id[1];
+	ctio->common.initiator_id[2] = atio->fcp_hdr.s_id[0];
+	ctio->common.exchange_addr = atio->exchange_addr;
+	ctio->flags = (atio->attr << 9) | __constant_cpu_to_le16(
+		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
+	ctio->ox_id = swab16(atio->fcp_hdr.ox_id);
+
+	/* Most likely, it isn't needed */
+	ctio->residual = get_unaligned((uint32_t *)
+			&atio->fcp_cmnd.add_cdb[atio->fcp_cmnd.add_cdb_len]);
+	if (ctio->residual != 0)
+		ctio->scsi_status |= SS_RESIDUAL_UNDER;
+
+	qla2x00_isp_cmd(vha, vha->req);
+
+out_unlock:
+	if (!ha_locked)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	if (do_tgt_cmd_done) {
+		if (!ha_locked && !in_interrupt())
+			msleep(250); /* just in case */
+
+		ha->qla2x_tmpl->free_cmd(cmd);
+	}
+}
+
+void qla_tgt_free_cmd(struct qla_tgt_cmd *cmd)
+{
+	BUG_ON(cmd->sg_mapped);
+
+	if (unlikely(cmd->free_sg))
+		kfree(cmd->sg);
+	kmem_cache_free(qla_tgt_cmd_cachep, cmd);
+}
+EXPORT_SYMBOL(qla_tgt_free_cmd);
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qla_tgt_prepare_srr_ctio(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
+	void *ctio)
+{
+	struct srr_ctio *sc;
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt *tgt = ha->qla_tgt;
+	struct srr_imm *imm;
+
+	tgt->ctio_srr_id++;
+
+	DEBUG22(qla_printk(KERN_INFO, ha, "qla_target(%d): CTIO with SRR "
+		"status received\n", vha->vp_idx));
+
+	if (!ctio) {
+		printk(KERN_ERR "qla_target(%d): SRR CTIO, "
+			"but ctio is NULL\n", vha->vp_idx);
+		return EINVAL;
+	}
+
+	dump_stack();
+
+	sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
+	if (sc != NULL) {
+		sc->cmd = cmd;
+		/* IRQ is already OFF */
+		spin_lock(&tgt->srr_lock);
+		sc->srr_id = tgt->ctio_srr_id;
+		list_add_tail(&sc->srr_list_entry,
+			&tgt->srr_ctio_list);
+		DEBUG22(qla_printk(KERN_INFO, ha, "CTIO SRR %p added (id %d)\n",
+			sc, sc->srr_id));
+		if (tgt->imm_srr_id == tgt->ctio_srr_id) {
+			int found = 0;
+			list_for_each_entry(imm, &tgt->srr_imm_list,
+					srr_list_entry) {
+				if (imm->srr_id == sc->srr_id) {
+					found = 1;
+					break;
+				}
+			}
+			if (found) {
+				DEBUG22(qla_printk(KERN_INFO, ha, "%s", "Scheduling srr work\n"));
+				schedule_work(&tgt->srr_work);
+			} else {
+				printk(KERN_ERR "qla_target(%d): imm_srr_id "
+					"== ctio_srr_id (%d), but there is no "
+					"corresponding SRR IMM, deleting CTIO "
+					"SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
+					sc);
+				list_del(&sc->srr_list_entry);
+				spin_unlock(&tgt->srr_lock);
+
+				kfree(sc);
+				return -EINVAL;
+			}
+		}
+		spin_unlock(&tgt->srr_lock);
+	} else {
+		struct srr_imm *ti;
+
+		printk(KERN_ERR "qla_target(%d): Unable to allocate SRR CTIO entry\n",
+			vha->vp_idx);
+		spin_lock(&tgt->srr_lock);
+		list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
+					srr_list_entry) {
+			if (imm->srr_id == tgt->ctio_srr_id) {
+				DEBUG22(qla_printk(KERN_INFO, ha, "IMM SRR %p deleted "
+					"(id %d)\n", imm, imm->srr_id));
+				list_del(&imm->srr_list_entry);
+				qla_tgt_reject_free_srr_imm(vha, imm, 1);
+			}
+		}
+		spin_unlock(&tgt->srr_lock);
+
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static int qla_tgt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
+	struct qla_tgt_cmd *cmd, uint32_t status)
+{
+	struct qla_hw_data *ha = vha->hw;
+	int term = 0;
+
+	if (IS_FWI2_CAPABLE(ha)) {
+		if (ctio != NULL) {
+			ctio7_fw_entry_t *c = (ctio7_fw_entry_t *)ctio;
+			term = !(c->flags &
+				__constant_cpu_to_le16(OF_TERM_EXCH));
+		} else
+			term = 1;
+		if (term) {
+			qla24xx_send_term_exchange(vha, cmd,
+				&cmd->atio.atio7, 1);
+		}
+	} else {
+		if (status != CTIO_SUCCESS)
+			qla_tgt_modify_command_count(vha, 1, 0);
+#if 0 /* seems, it isn't needed */
+		if (ctio != NULL) {
+			ctio_common_entry_t *c = (ctio_common_entry_t *)ctio;
+			term = !(c->flags &
+				__constant_cpu_to_le16(
+					CTIO7_FLAGS_TERMINATE));
+		} else
+			term = 1;
+		if (term) {
+			qla2xxx_send_term_exchange(vha, cmd,
+				&cmd->atio.atio2x, 1);
+		}
+#endif
+	}
+	return term;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static inline struct qla_tgt_cmd *qla_tgt_get_cmd(struct scsi_qla_host *vha, uint32_t handle)
+{
+	struct qla_hw_data *ha = vha->hw;
+
+	handle--;
+	if (ha->cmds[handle] != NULL) {
+		struct qla_tgt_cmd *cmd = ha->cmds[handle];
+		ha->cmds[handle] = NULL;
+		return cmd;
+	} else
+		return NULL;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static struct qla_tgt_cmd *qla_tgt_ctio_to_cmd(struct scsi_qla_host *vha, uint32_t handle,
+	void *ctio)
+{
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_tgt_cmd *cmd = NULL;
+
+	/* Clear out internal marks */
+	handle &= ~(CTIO_COMPLETION_HANDLE_MARK | CTIO_INTERMEDIATE_HANDLE_MARK);
+
+	if (handle != QLA_TGT_NULL_HANDLE) {
+		if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
+			DEBUG21(qla_printk(KERN_INFO, ha, "%s", "SKIP_HANDLE CTIO\n"));
+			return NULL;
+		}
+		/* handle-1 is actually used */
+		if (unlikely(handle > MAX_OUTSTANDING_COMMANDS)) {
+			printk(KERN_ERR "qla_target(%d): Wrong handle %x "
+				"received\n", vha->vp_idx, handle);
+			return NULL;
+		}
+		cmd = qla_tgt_get_cmd(vha, handle);
+		if (unlikely(cmd == NULL)) {
+			printk(KERN_WARNING "qla_target(%d): Suspicious: unable to "
+				   "find the command with handle %x\n",
+				   vha->vp_idx, handle);
+			return NULL;
+		}
+	} else if (ctio != NULL) {
+		struct qla_tgt_sess *sess;
+		int tag;
+		uint16_t loop_id;
+
+		if (IS_FWI2_CAPABLE(ha)) {
+			/* We can't get loop ID from CTIO7 */
+			printk(KERN_ERR "qla_target(%d): Wrong CTIO received: "
+				"QLA24xx doesn't support NULL handles\n",
+				vha->vp_idx);
+			return NULL;
+		} else {
+			ctio_common_entry_t *c = (ctio_common_entry_t *)ctio;
+			loop_id = GET_TARGET_ID(ha, c);
+			tag = c->rx_id;
+		}
+
+		sess = ha->qla2x_tmpl->find_sess_by_loop_id(vha, loop_id);
+		if (!sess) {
+			printk(KERN_WARNING "qla_target(%d): Suspicious: "
+				   "ctio_completion for non-existing session "
+				   "(loop_id %d, tag %d)\n",
+				   vha->vp_idx, loop_id, tag);
+			return NULL;
+		}
+	}
+
+	return cmd;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qla_tgt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
+	uint32_t status, void *ctio)
+{
+	struct qla_hw_data *ha = vha->hw;
+	struct se_cmd *se_cmd;
+	struct target_core_fabric_ops *tfo;
+	struct qla_tgt_cmd *cmd;
+
+	DEBUG23(qla_printk(KERN_INFO, ha, "qla_target(%d): handle(ctio %p status"
+		" %#x) <- %08x\n", vha->vp_idx, ctio, status, handle));
+
+	if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
+		/* That could happen only in case of an error/reset/abort */
+		if (status != CTIO_SUCCESS) {
+			DEBUG22(qla_printk(KERN_INFO, ha, "Intermediate CTIO received"
+				" (status %x)\n", status));
+		}
+		return;
+	}
+
+	cmd = qla_tgt_ctio_to_cmd(vha, handle, ctio);
+	if (cmd == NULL) {
+		if (status != CTIO_SUCCESS)
+			qla_tgt_term_ctio_exchange(vha, ctio, NULL, status);
+		return;
+	}
+	se_cmd = &cmd->se_cmd;
+	tfo = se_cmd->se_tfo;
+
+	if (cmd->sg_mapped)
+		qla_tgt_unmap_sg(vha, cmd);
+
+	if (unlikely(status != CTIO_SUCCESS)) {
+		switch (status & 0xFFFF) {
+		case CTIO_LIP_RESET:
+		case CTIO_TARGET_RESET:
+		case CTIO_ABORTED:
+		case CTIO_TIMEOUT:
+		case CTIO_INVALID_RX_ID:
+			/* They are OK */
+			printk(KERN_INFO "qla_target(%d): CTIO with "
+				"status %#x received, state %x, se_cmd %p, "
+				"(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
+				"TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
+				status, cmd->state, se_cmd);
+			break;
+
+		case CTIO_PORT_LOGGED_OUT:
+		case CTIO_PORT_UNAVAILABLE:
+			printk(KERN_INFO "qla_target(%d): CTIO with PORT LOGGED "
+				"OUT (29) or PORT UNAVAILABLE (28) status %x "
+				"received (state %x, se_cmd %p)\n",
+				vha->vp_idx, status, cmd->state, se_cmd);
+			break;
+
+		case CTIO_SRR_RECEIVED:
+			printk(KERN_INFO "qla_target(%d): CTIO with SRR_RECEIVED"
+				" status %x received (state %x, se_cmd %p)\n",
+				vha->vp_idx, status, cmd->state, se_cmd);
+			if (qla_tgt_prepare_srr_ctio(vha, cmd, ctio) != 0)
+				break;
+			else
+				return;
+
+		default:
+			printk(KERN_ERR "qla_target(%d): CTIO with error status "
+				"0x%x received (state %x, se_cmd %p\n",
+				vha->vp_idx, status, cmd->state, se_cmd);
+			break;
+		}
+
+		if (cmd->state != QLA_TGT_STATE_NEED_DATA)
+			if (qla_tgt_term_ctio_exchange(vha, ctio, cmd, status))
+				return;
+	}
+
+	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
+		DEBUG21(qla_printk(KERN_INFO, ha, "Command %p finished\n", cmd));
+	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
+		int rx_status = 0;
+
+		cmd->state = QLA_TGT_STATE_DATA_IN;
+
+		if (unlikely(status != CTIO_SUCCESS))
+			rx_status = -EIO;
+		else
+			cmd->write_data_transferred = 1;
+
+		DEBUG21(qla_printk(KERN_INFO, ha, "Data received, context %x,"
+				" rx_status %d\n", 0x0, rx_status));
+
+		ha->qla2x_tmpl->handle_data(cmd);
+		return;
+	} else if (cmd->state == QLA_TGT_STATE_ABORTED) {
+		DEBUG22(qla_printk(KERN_INFO, ha, "Aborted command %p (tag %d) finished\n",
+				cmd, cmd->tag));
+	} else {
+		printk(KERN_ERR "qla_target(%d): A command in state (%d) should "
+			"not return a CTIO complete\n", vha->vp_idx, cmd->state);
+	}
+
+	if (unlikely(status != CTIO_SUCCESS)) {
+		DEBUG22(qla_printk(KERN_INFO, ha, "%s", "Finishing failed CTIO\n"));
+		dump_stack();
+	}
+
+	ha->qla2x_tmpl->free_cmd(cmd);
+}
+
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index d3e58d7..5318478 100644
@@ -5,6 +5,7 @@
  * See LICENSE.qla2xxx for copyright and licensing details.
  */
 #include "qla_def.h"
+#include "qla_target.h"
 
 #include <linux/kthread.h>
 #include <linux/vmalloc.h>

@@ -1816,6 +1817,7 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
 	fc_host_supported_speeds(vha->host) =
 		fc_host_supported_speeds(base_vha->host);
 
+	qla_tgt_vport_create(vha, ha);
 	qla24xx_vport_disable(fc_vport, disable);
 
 	if (ha->flags.cpu_affinity_enabled) {

@@ -2020,7 +2022,8 @@ qla2x00_init_host_attr(scsi_qla_host_t *vha)
 	fc_host_dev_loss_tmo(vha->host) = ha->port_down_retry_count;
 	fc_host_node_name(vha->host) = wwn_to_u64(vha->node_name);
 	fc_host_port_name(vha->host) = wwn_to_u64(vha->port_name);
-	fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
+	fc_host_supported_classes(vha->host) = ha->enable_class_2 ?
+			(FC_COS_CLASS2|FC_COS_CLASS3) : FC_COS_CLASS3;
 	fc_host_max_npiv_vports(vha->host) = ha->max_npiv_vports;
 	fc_host_npiv_vports_inuse(vha->host) = ha->cur_vport_count;
 

index b74e6b5..b5b2f95 100644
@@ -28,6 +28,11 @@
 /* #define QL_DEBUG_LEVEL_16 */ /* Output ISP84XX trace msgs */
 /* #define QL_DEBUG_LEVEL_17 */ /* Output EEH trace messages */
 /* #define QL_DEBUG_LEVEL_18 */ /* Output T10 CRC trace messages */
+/* #define QL_DEBUG_LEVEL_21 */ /* Output for target */
+/* #define QL_DEBUG_LEVEL_22 */ /* Output for target management */
+/* #define QL_DEBUG_LEVEL_23 */ /* Output for target scsi packets */
+/* #define QL_DEBUG_LEVEL_24 */ /* Output for target SG lists */
+/* #define QL_DEBUG_LEVEL_25 */ /* Output for target task management */
 
 /*
 * Macros use for debugging the driver.

@@ -146,6 +151,35 @@
 #define DEBUG18(x)	do {} while (0)
 #endif
 
+#if defined(QL_DEBUG_LEVEL_21)
+#define DEBUG21(x)	do {x;} while (0)
+#else
+#define DEBUG21(x)	do {} while (0)
+#endif
+
+#if defined(QL_DEBUG_LEVEL_22)
+#define DEBUG22(x)	do {x;} while (0)
+#else
+#define DEBUG22(x)	do {} while (0)
+#endif
+
+#if defined(QL_DEBUG_LEVEL_23)
+#define DEBUG23(x)	do {x;} while (0)
+#else
+#define DEBUG23(x)	do {} while (0)
+#endif
+
+#if defined(QL_DEBUG_LEVEL_24)
+#define DEBUG24(x)	do {x;} while (0)
+#else
+#define DEBUG24(x)	do {} while (0)
+#endif
+
+#if defined(QL_DEBUG_LEVEL_25)
+#define DEBUG25(x)	do {x;} while (0)
+#else
+#define DEBUG25(x)	do {} while (0)
+#endif
 
 /*
  * Firmware Dump structure definition

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index d48326e..6c0a9e8 100644
@@ -172,6 +172,7 @@ extern int  qla2x00_vp_abort_isp(scsi_qla_host_t *);
 /*
  * Global Function Prototypes in qla_iocb.c source file.
  */
+
 extern uint16_t qla2x00_calc_iocbs_32(uint16_t);
 extern uint16_t qla2x00_calc_iocbs_64(uint16_t);
 extern void qla2x00_build_scsi_iocbs_32(srb_t *, cmd_entry_t *, uint16_t);

@@ -185,6 +186,9 @@ extern uint16_t qla24xx_calc_iocbs(uint16_t);
 extern void qla24xx_build_scsi_iocbs(srb_t *, struct cmd_type_7 *, uint16_t);
 extern int qla24xx_dif_start_scsi(srb_t *);
 
+extern void *qla2x00_alloc_iocbs(scsi_qla_host_t *, srb_t *);
+extern void qla2x00_isp_cmd(struct scsi_qla_host *, struct req_que *);
+extern int qla2x00_issue_marker(scsi_qla_host_t *, int);
 
 /*
  * Global Function Prototypes in qla_mbx.c source file.

@@ -237,6 +241,9 @@ extern int
 qla2x00_init_firmware(scsi_qla_host_t *, uint16_t);
 
 extern int
+qla2x00_get_node_name_list(scsi_qla_host_t *, void **, int *);
+
+extern int
 qla2x00_get_port_database(scsi_qla_host_t *, fc_port_t *, uint8_t);
 
 extern int

index 74a91b6..e5f33ad 100644
@@ -5,6 +5,7 @@
  * See LICENSE.qla2xxx for copyright and licensing details.
  */
 #include "qla_def.h"
+#include "qla_target.h"
 
 static int qla2x00_sns_ga_nxt(scsi_qla_host_t *, fc_port_t *);
 static int qla2x00_sns_gid_pt(scsi_qla_host_t *, sw_info_t *);

@@ -548,7 +549,8 @@ qla2x00_rff_id(scsi_qla_host_t *vha)
 	ct_req->req.rff_id.port_id[1] = vha->d_id.b.area;
 	ct_req->req.rff_id.port_id[2] = vha->d_id.b.al_pa;
 
-	ct_req->req.rff_id.fc4_feature = BIT_1;
+	qla_tgt_rff_id(vha, ct_req);
+
 	ct_req->req.rff_id.fc4_type = 0x08;		/* SCSI - FCP */
 
 	/* Execute MS IOCB */

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index 2b69392..b91a50a 100644
@@ -6,6 +6,7 @@
  */
 #include "qla_def.h"
 #include "qla_gbl.h"
+#include "qla_target.h"
 
 #include <linux/moduleparam.h>
 #include <linux/vmalloc.h>

@@ -48,6 +49,7 @@ qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
 
 	spin_lock_irqsave(&ha->vport_slock, flags);
 	list_add_tail(&vha->list, &ha->vp_list);
+	ha->tgt_vp_map[vp_id].vha = vha;
 	spin_unlock_irqrestore(&ha->vport_slock, flags);
 
 	mutex_unlock(&ha->vport_lock);

@@ -78,6 +80,7 @@ qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
 		spin_lock_irqsave(&ha->vport_slock, flags);
 	}
 	list_del(&vha->list);
+	ha->tgt_vp_map[vha->vp_idx].vha = NULL;
 	spin_unlock_irqrestore(&ha->vport_slock, flags);
 
 	vp_id = vha->vp_idx;

@@ -143,12 +146,16 @@ qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
 int
 qla24xx_disable_vp(scsi_qla_host_t *vha)
 {
+	struct qla_hw_data *ha = vha->hw;
 	int ret;
 
 	ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 	atomic_set(&vha->loop_state, LOOP_DOWN);
 	atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 
+	/* Remove port id from vp target map */
+	ha->tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
+
 	qla2x00_mark_vp_devices_dead(vha);
 	atomic_set(&vha->vp_state, VP_FAILED);
 	vha->flags.management_server_logged_in = 0;

@@ -266,6 +273,8 @@ qla2x00_alert_all_vps(struct rsp_que *rsp, uint16_t *mb)
 int
 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 {
+	int ret;
+
 	/*
 	 * Physical port will do most of the abort and recovery work. We can
 	 * just treat it as a loop down

@@ -288,7 +297,17 @@ qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 
 	DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 	    vha->host_no, vha->vp_idx));
-	return qla24xx_enable_vp(vha);
+	ret = qla24xx_enable_vp(vha);
+	if (ret)
+		return ret;
+
+	/* Enable target response to SCSI bus. */
+	if (qla_tgt_mode_enabled(vha)) {
+		DEBUG15(printk("qla2x00_vp_abort_isp() calling qla2x00_send_enable_lun()\n"));
+		qla2x00_send_enable_lun(vha, true);
+	}
+
+	return 0;
 }
 
 static int

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