qla_target.c 159.6 KB
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/*
 *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
 *
 *  based on qla2x00t.c code:
 *
 *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
 *  Copyright (C) 2004 - 2005 Leonid Stoljar
 *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
 *  Copyright (C) 2006 - 2010 ID7 Ltd.
 *
 *  Forward port and refactoring to modern qla2xxx and target/configfs
 *
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 *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
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 *
 *  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/blkdev.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/workqueue.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>

#include "qla_def.h"
#include "qla_target.h"

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static int ql2xtgt_tape_enable;
module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xtgt_tape_enable,
		"Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");

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static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
module_param(qlini_mode, charp, S_IRUGO);
MODULE_PARM_DESC(qlini_mode,
	"Determines when initiator mode will be enabled. Possible values: "
	"\"exclusive\" - 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\" (default) - initiator mode will always stay enabled.");

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int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
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static int temp_sam_status = SAM_STAT_BUSY;

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/*
 * 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 */
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#define FCP_PTA_ACA         4   /* auto. contingent allegiance */
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#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_alloc_iocbs() 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.
 */
/* Predefs for callbacks handed to qla2xxx LLD */
static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
	struct atio_from_isp *pkt);
static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
	int fn, void *iocb, int flags);
static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
	*cmd, struct atio_from_isp *atio, int ha_locked);
static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
	struct qla_tgt_srr_imm *imm, int ha_lock);
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static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
	struct qla_tgt_cmd *cmd);
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static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
	struct atio_from_isp *atio, uint16_t status, int qfull);
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static void qlt_disable_vha(struct scsi_qla_host *vha);
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/*
 * Global Variables
 */
static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
static mempool_t *qla_tgt_mgmt_cmd_mempool;
static struct workqueue_struct *qla_tgt_wq;
static DEFINE_MUTEX(qla_tgt_mutex);
static LIST_HEAD(qla_tgt_glist);

/* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
static struct qla_tgt_sess *qlt_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 (!memcmp(sess->port_name, port_name, WWN_SIZE))
			return sess;
	}

	return NULL;
}

/* Might release hw lock, then reaquire!! */
static inline int qlt_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) {
			ql_dbg(ql_dbg_tgt, vha, 0xe03d,
			    "qla_target(%d): issue_marker() failed\n",
			    vha->vp_idx);
		}
		return rc;
	}
	return QLA_SUCCESS;
}

static inline
struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
	uint8_t *d_id)
{
	struct qla_hw_data *ha = vha->hw;
	uint8_t vp_idx;

	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;

	BUG_ON(ha->tgt.tgt_vp_map == NULL);
	vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
	if (likely(test_bit(vp_idx, ha->vp_idx_map)))
		return ha->tgt.tgt_vp_map[vp_idx].vha;

	return NULL;
}

static inline
struct scsi_qla_host *qlt_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;

	BUG_ON(ha->tgt.tgt_vp_map == NULL);
	if (likely(test_bit(vp_idx, ha->vp_idx_map)))
		return ha->tgt.tgt_vp_map[vp_idx].vha;

	return NULL;
}

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static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
{
	unsigned long flags;

	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);

	vha->hw->tgt.num_pend_cmds++;
	if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
		vha->hw->qla_stats.stat_max_pend_cmds =
			vha->hw->tgt.num_pend_cmds;
	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
}
static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
{
	unsigned long flags;

	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
	vha->hw->tgt.num_pend_cmds--;
	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
}

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static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
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	struct atio_from_isp *atio)
{
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	ql_dbg(ql_dbg_tgt, vha, 0xe072,
		"%s: qla_target(%d): type %x ox_id %04x\n",
		__func__, vha->vp_idx, atio->u.raw.entry_type,
		be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));

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	switch (atio->u.raw.entry_type) {
	case ATIO_TYPE7:
	{
		struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
		    atio->u.isp24.fcp_hdr.d_id);
		if (unlikely(NULL == host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe03e,
			    "qla_target(%d): Received ATIO_TYPE7 "
			    "with unknown d_id %x:%x:%x\n", vha->vp_idx,
			    atio->u.isp24.fcp_hdr.d_id[0],
			    atio->u.isp24.fcp_hdr.d_id[1],
			    atio->u.isp24.fcp_hdr.d_id[2]);
			break;
		}
		qlt_24xx_atio_pkt(host, atio);
		break;
	}

	case IMMED_NOTIFY_TYPE:
	{
		struct scsi_qla_host *host = vha;
		struct imm_ntfy_from_isp *entry =
		    (struct imm_ntfy_from_isp *)atio;

		if ((entry->u.isp24.vp_index != 0xFF) &&
		    (entry->u.isp24.nport_handle != 0xFFFF)) {
			host = qlt_find_host_by_vp_idx(vha,
			    entry->u.isp24.vp_index);
			if (unlikely(!host)) {
				ql_dbg(ql_dbg_tgt, vha, 0xe03f,
				    "qla_target(%d): Received "
				    "ATIO (IMMED_NOTIFY_TYPE) "
				    "with unknown vp_index %d\n",
				    vha->vp_idx, entry->u.isp24.vp_index);
				break;
			}
		}
		qlt_24xx_atio_pkt(host, atio);
		break;
	}

	default:
		ql_dbg(ql_dbg_tgt, vha, 0xe040,
		    "qla_target(%d): Received unknown ATIO atio "
		    "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
		break;
	}

	return;
}

void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
{
	switch (pkt->entry_type) {
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	case CTIO_CRC2:
		ql_dbg(ql_dbg_tgt, vha, 0xe073,
			"qla_target(%d):%s: CRC2 Response pkt\n",
			vha->vp_idx, __func__);
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	case CTIO_TYPE7:
	{
		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
		    entry->vp_index);
		if (unlikely(!host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe041,
			    "qla_target(%d): Response pkt (CTIO_TYPE7) "
			    "received, with unknown vp_index %d\n",
			    vha->vp_idx, entry->vp_index);
			break;
		}
		qlt_response_pkt(host, pkt);
		break;
	}

	case IMMED_NOTIFY_TYPE:
	{
		struct scsi_qla_host *host = vha;
		struct imm_ntfy_from_isp *entry =
		    (struct imm_ntfy_from_isp *)pkt;

		host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
		if (unlikely(!host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe042,
			    "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
			    "received, with unknown vp_index %d\n",
			    vha->vp_idx, entry->u.isp24.vp_index);
			break;
		}
		qlt_response_pkt(host, pkt);
		break;
	}

	case NOTIFY_ACK_TYPE:
	{
		struct scsi_qla_host *host = vha;
		struct nack_to_isp *entry = (struct nack_to_isp *)pkt;

		if (0xFF != entry->u.isp24.vp_index) {
			host = qlt_find_host_by_vp_idx(vha,
			    entry->u.isp24.vp_index);
			if (unlikely(!host)) {
				ql_dbg(ql_dbg_tgt, vha, 0xe043,
				    "qla_target(%d): Response "
				    "pkt (NOTIFY_ACK_TYPE) "
				    "received, with unknown "
				    "vp_index %d\n", vha->vp_idx,
				    entry->u.isp24.vp_index);
				break;
			}
		}
		qlt_response_pkt(host, pkt);
		break;
	}

	case ABTS_RECV_24XX:
	{
		struct abts_recv_from_24xx *entry =
		    (struct abts_recv_from_24xx *)pkt;
		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
		    entry->vp_index);
		if (unlikely(!host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe044,
			    "qla_target(%d): Response pkt "
			    "(ABTS_RECV_24XX) received, with unknown "
			    "vp_index %d\n", vha->vp_idx, entry->vp_index);
			break;
		}
		qlt_response_pkt(host, pkt);
		break;
	}

	case ABTS_RESP_24XX:
	{
		struct abts_resp_to_24xx *entry =
		    (struct abts_resp_to_24xx *)pkt;
		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
		    entry->vp_index);
		if (unlikely(!host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe045,
			    "qla_target(%d): Response pkt "
			    "(ABTS_RECV_24XX) received, with unknown "
			    "vp_index %d\n", vha->vp_idx, entry->vp_index);
			break;
		}
		qlt_response_pkt(host, pkt);
		break;
	}

	default:
		qlt_response_pkt(vha, pkt);
		break;
	}

}

static void qlt_free_session_done(struct work_struct *work)
{
	struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
	    free_work);
	struct qla_tgt *tgt = sess->tgt;
	struct scsi_qla_host *vha = sess->vha;
	struct qla_hw_data *ha = vha->hw;

	BUG_ON(!tgt);
	/*
	 * Release the target session for FC Nexus from fabric module code.
	 */
	if (sess->se_sess != NULL)
		ha->tgt.tgt_ops->free_session(sess);

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
	    "Unregistration of sess %p finished\n", sess);

	kfree(sess);
	/*
	 * 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 */
void qlt_unreg_sess(struct qla_tgt_sess *sess)
{
	struct scsi_qla_host *vha = sess->vha;

	vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);

	list_del(&sess->sess_list_entry);
	if (sess->deleted)
		list_del(&sess->del_list_entry);

	INIT_WORK(&sess->free_work, qlt_free_session_done);
	schedule_work(&sess->free_work);
}
EXPORT_SYMBOL(qlt_unreg_sess);

/* ha->hardware_lock supposed to be held on entry */
static int qlt_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;
	struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;

	loop_id = le16_to_cpu(n->u.isp24.nport_handle);
	if (loop_id == 0xFFFF) {
#if 0 /* FIXME: Re-enable Global event handling.. */
		/* Global event */
		atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
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		qlt_clear_tgt_db(ha->tgt.qla_tgt);
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		if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
			sess = list_entry(ha->tgt.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:
				ql_dbg(ql_dbg_tgt, vha, 0xe046,
				    "qla_target(%d): Not allowed "
				    "command %x in %s", vha->vp_idx,
				    mcmd, __func__);
				sess = NULL;
				break;
			}
		} else
			sess = NULL;
#endif
	} else {
		sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
	}

	ql_dbg(ql_dbg_tgt, vha, 0xe000,
	    "Using sess for qla_tgt_reset: %p\n", sess);
	if (!sess) {
		res = -ESRCH;
		return res;
	}

	ql_dbg(ql_dbg_tgt, vha, 0xe047,
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	    "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
	    "loop_id %d)\n", vha->host_no, sess, sess->port_name,
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	    mcmd, loop_id);

	lun = a->u.isp24.fcp_cmnd.lun;
	unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);

	return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
	    iocb, QLA24XX_MGMT_SEND_NACK);
}

/* ha->hardware_lock supposed to be held on entry */
static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
	bool immediate)
{
	struct qla_tgt *tgt = sess->tgt;
	uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;

	if (sess->deleted)
		return;

	ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
	    "Scheduling sess %p for deletion\n", sess);
	list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
	sess->deleted = 1;

	if (immediate)
		dev_loss_tmo = 0;

	sess->expires = jiffies + dev_loss_tmo * HZ;

	ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
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	    "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
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	    "deletion in %u secs (expires: %lu) immed: %d\n",
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	    sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
	    sess->expires, immediate);
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	if (immediate)
		schedule_delayed_work(&tgt->sess_del_work, 0);
	else
		schedule_delayed_work(&tgt->sess_del_work,
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		    sess->expires - jiffies);
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}

/* ha->hardware_lock supposed to be held on entry */
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static void qlt_clear_tgt_db(struct qla_tgt *tgt)
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{
	struct qla_tgt_sess *sess;

	list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
		qlt_schedule_sess_for_deletion(sess, true);

	/* 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, qla2x00_gid_list_size(ha),
	    &gid_list_dma, GFP_KERNEL);
	if (!gid_list) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
		    "qla_target(%d): DMA Alloc failed of %u\n",
		    vha->vp_idx, qla2x00_gid_list_size(ha));
		return -ENOMEM;
	}

	/* Get list of logged in devices */
	rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
	if (rc != QLA_SUCCESS) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
		    "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, qla2x00_gid_list_size(ha),
	    gid_list, gid_list_dma);
	return res;
}

/* ha->hardware_lock supposed to be held on entry */
static void qlt_undelete_sess(struct qla_tgt_sess *sess)
{
	BUG_ON(!sess->deleted);

	list_del(&sess->del_list_entry);
	sess->deleted = 0;
}

static void qlt_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;
594
	unsigned long flags, elapsed;
595 596 597 598 599

	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);
600 601
		elapsed = jiffies;
		if (time_after_eq(elapsed, sess->expires)) {
602 603
			qlt_undelete_sess(sess);

604 605 606 607 608
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
			    "Timeout: sess %p about to be deleted\n",
			    sess);
			ha->tgt.tgt_ops->shutdown_sess(sess);
			ha->tgt.tgt_ops->put_sess(sess);
609 610
		} else {
			schedule_delayed_work(&tgt->sess_del_work,
611
			    sess->expires - elapsed);
612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633
			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 *qlt_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 */
	spin_lock_irqsave(&ha->hardware_lock, flags);
634
	list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
635 636 637 638 639 640 641 642 643 644 645 646 647 648 649
				sess_list_entry) {
		if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
			    "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)
				qlt_undelete_sess(sess);

			kref_get(&sess->se_sess->sess_kref);
650 651 652
			ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
						(fcport->flags & FCF_CONF_COMP_SUPPORTED));

653 654 655 656 657 658 659 660 661 662 663 664
			if (sess->local && !local)
				sess->local = 0;
			spin_unlock_irqrestore(&ha->hardware_lock, flags);

			return sess;
		}
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	sess = kzalloc(sizeof(*sess), GFP_KERNEL);
	if (!sess) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
665 666 667
		    "qla_target(%u): session allocation failed, all commands "
		    "from port %8phC will be refused", vha->vp_idx,
		    fcport->port_name);
668 669 670

		return NULL;
	}
671
	sess->tgt = vha->vha_tgt.qla_tgt;
672 673 674 675 676 677 678
	sess->vha = vha;
	sess->s_id = fcport->d_id;
	sess->loop_id = fcport->loop_id;
	sess->local = local;

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
	    "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
679
	    sess, vha->vha_tgt.qla_tgt);
680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700

	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->tgt.tgt_ops->check_initiator_node_acl(vha,
	    &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
		kfree(sess);
		return NULL;
	}
	/*
	 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
	 * access across ->hardware_lock reaquire.
	 */
	kref_get(&sess->se_sess->sess_kref);

701
	sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
702 703 704 705
	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);
706 707
	list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
	vha->vha_tgt.qla_tgt->sess_count++;
708 709 710
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
711 712 713 714 715
	    "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
	    "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
	    vha->vp_idx, local ?  "local " : "", fcport->port_name,
	    fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
	    sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
716 717 718 719 720 721 722 723 724 725

	return sess;
}

/*
 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 */
void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
{
	struct qla_hw_data *ha = vha->hw;
726
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
727 728 729 730 731 732 733 734 735
	struct qla_tgt_sess *sess;
	unsigned long flags;

	if (!vha->hw->tgt.tgt_ops)
		return;

	if (!tgt || (fcport->port_type != FCT_INITIATOR))
		return;

736 737 738
	if (qla_ini_mode_enabled(vha))
		return;

739 740 741 742 743 744 745 746 747
	spin_lock_irqsave(&ha->hardware_lock, flags);
	if (tgt->tgt_stop) {
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return;
	}
	sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
	if (!sess) {
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

748
		mutex_lock(&vha->vha_tgt.tgt_mutex);
749
		sess = qlt_create_sess(vha, fcport, false);
750
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
751 752 753 754 755 756 757 758 759

		spin_lock_irqsave(&ha->hardware_lock, flags);
	} else {
		kref_get(&sess->se_sess->sess_kref);

		if (sess->deleted) {
			qlt_undelete_sess(sess);

			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
760 761 762
			    "qla_target(%u): %ssession for port %8phC "
			    "(loop ID %d) reappeared\n", vha->vp_idx,
			    sess->local ? "local " : "", sess->port_name,
763 764 765 766 767
			    sess->loop_id);

			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
			    "Reappeared sess %p\n", sess);
		}
768 769
		ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
					(fcport->flags & FCF_CONF_COMP_SUPPORTED));
770 771 772 773 774
	}

	if (sess && sess->local) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
		    "qla_target(%u): local session for "
775 776
		    "port %8phC (loop ID %d) became global\n", vha->vp_idx,
		    fcport->port_name, sess->loop_id);
777 778 779
		sess->local = 0;
	}
	ha->tgt.tgt_ops->put_sess(sess);
780
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
781 782 783 784 785
}

void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
{
	struct qla_hw_data *ha = vha->hw;
786
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833
	struct qla_tgt_sess *sess;
	unsigned long flags;

	if (!vha->hw->tgt.tgt_ops)
		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 = qlt_find_sess_by_port_name(tgt, fcport->port_name);
	if (!sess) {
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return;
	}

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);

	sess->local = 1;
	qlt_schedule_sess_for_deletion(sess, false);
	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);
	ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
	    "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 */
834
int qlt_stop_phase1(struct qla_tgt *tgt)
835 836 837 838 839
{
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = tgt->ha;
	unsigned long flags;

840 841 842 843 844 845 846 847 848 849 850 851 852 853 854
	mutex_lock(&qla_tgt_mutex);
	if (!vha->fc_vport) {
		struct Scsi_Host *sh = vha->host;
		struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
		bool npiv_vports;

		spin_lock_irqsave(sh->host_lock, flags);
		npiv_vports = (fc_host->npiv_vports_inuse);
		spin_unlock_irqrestore(sh->host_lock, flags);

		if (npiv_vports) {
			mutex_unlock(&qla_tgt_mutex);
			return -EPERM;
		}
	}
855 856 857
	if (tgt->tgt_stop || tgt->tgt_stopped) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
		    "Already in tgt->tgt_stop or tgt_stopped state\n");
858 859
		mutex_unlock(&qla_tgt_mutex);
		return -EPERM;
860 861 862 863 864 865 866 867
	}

	ql_dbg(ql_dbg_tgt, vha, 0xe003, "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.
	 */
868
	mutex_lock(&vha->vha_tgt.tgt_mutex);
869 870
	spin_lock_irqsave(&ha->hardware_lock, flags);
	tgt->tgt_stop = 1;
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Joern Engel 已提交
871
	qlt_clear_tgt_db(tgt);
872
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
873
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
874
	mutex_unlock(&qla_tgt_mutex);
875

876
	flush_delayed_work(&tgt->sess_del_work);
877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
	    "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);

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
	    "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->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
		qlt_disable_vha(vha);

	/* Wait for sessions to clear out (just in case) */
	wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
901
	return 0;
902 903 904 905 906 907 908
}
EXPORT_SYMBOL(qlt_stop_phase1);

/* Called by tcm_qla2xxx configfs code */
void qlt_stop_phase2(struct qla_tgt *tgt)
{
	struct qla_hw_data *ha = tgt->ha;
909
	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
910 911 912
	unsigned long flags;

	if (tgt->tgt_stopped) {
913
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
914 915 916 917 918
		    "Already in tgt->tgt_stopped state\n");
		dump_stack();
		return;
	}

919
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
920 921 922
	    "Waiting for %d IRQ commands to complete (tgt %p)",
	    tgt->irq_cmd_count, tgt);

923
	mutex_lock(&vha->vha_tgt.tgt_mutex);
924 925 926 927 928 929 930 931 932
	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);
933
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
934

935
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
936 937 938 939 940
	    tgt);
}
EXPORT_SYMBOL(qlt_stop_phase2);

/* Called from qlt_remove_target() -> qla2x00_remove_one() */
941
static void qlt_release(struct qla_tgt *tgt)
942
{
943
	scsi_qla_host_t *vha = tgt->vha;
944

945
	if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
946 947
		qlt_stop_phase2(tgt);

948
	vha->vha_tgt.qla_tgt = NULL;
949

950
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013
	    "Release of tgt %p finished\n", tgt);

	kfree(tgt);
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_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) {
		ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
		    "qla_target(%d): Unable to create session "
		    "work, command will be refused", 0);
		return -ENOMEM;
	}

	ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
	    "Scheduling work (type %d, prm %p)"
	    " to find session for param %p (size %d, tgt %p)\n",
	    type, prm, param, param_size, tgt);

	prm->type = type;
	memcpy(&prm->tm_iocb, param, param_size);

	spin_lock_irqsave(&tgt->sess_work_lock, flags);
	list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
	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 qlt_send_notify_ack(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *ntfy,
	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;
	request_t *pkt;
	struct nack_to_isp *nack;

	ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);

	/* Send marker if required */
	if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
		return;

	pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
	if (!pkt) {
		ql_dbg(ql_dbg_tgt, vha, 0xe049,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet\n", vha->vp_idx, __func__);
		return;
	}

1014 1015
	if (vha->vha_tgt.qla_tgt != NULL)
		vha->vha_tgt.qla_tgt->notify_ack_expected++;
1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030

	pkt->entry_type = NOTIFY_ACK_TYPE;
	pkt->entry_count = 1;

	nack = (struct nack_to_isp *)pkt;
	nack->ox_id = ntfy->ox_id;

	nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
	if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
		nack->u.isp24.flags = ntfy->u.isp24.flags &
			__constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
	}
	nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
	nack->u.isp24.status = ntfy->u.isp24.status;
	nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1031
	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043
	nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
	nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
	nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
	nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
	nack->u.isp24.srr_reject_code = srr_reject_code;
	nack->u.isp24.srr_reject_code_expl = srr_explan;
	nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;

	ql_dbg(ql_dbg_tgt, vha, 0xe005,
	    "qla_target(%d): Sending 24xx Notify Ack %d\n",
	    vha->vp_idx, nack->u.isp24.status);

1044 1045
	/* Memory Barrier */
	wmb();
1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
	qla2x00_start_iocbs(vha, vha->req);
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
	struct abts_recv_from_24xx *abts, uint32_t status,
	bool ids_reversed)
{
	struct qla_hw_data *ha = vha->hw;
	struct abts_resp_to_24xx *resp;
	uint32_t f_ctl;
	uint8_t *p;

	ql_dbg(ql_dbg_tgt, vha, 0xe006,
	    "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
	    ha, abts, status);

	/* Send marker if required */
	if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
		return;

1069
	resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
	if (!resp) {
		ql_dbg(ql_dbg_tgt, vha, 0xe04a,
		    "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 */
	}

1121
	vha->vha_tgt.qla_tgt->abts_resp_expected++;
1122

1123 1124
	/* Memory Barrier */
	wmb();
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
	qla2x00_start_iocbs(vha, vha->req);
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
	struct abts_resp_from_24xx_fw *entry)
{
	struct ctio7_to_24xx *ctio;

	ql_dbg(ql_dbg_tgt, vha, 0xe007,
	    "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
	/* Send marker if required */
	if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
		return;

1142
	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167
	if (ctio == NULL) {
		ql_dbg(ql_dbg_tgt, vha, 0xe04b,
		    "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->entry_type = CTIO_TYPE7;
	ctio->entry_count = 1;
	ctio->nport_handle = entry->nport_handle;
	ctio->handle = QLA_TGT_SKIP_HANDLE |	CTIO_COMPLETION_HANDLE_MARK;
	ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
	ctio->vp_index = vha->vp_idx;
	ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
	ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
	ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
	ctio->exchange_addr = entry->exchange_addr_to_abort;
	ctio->u.status1.flags =
	    __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
		CTIO7_FLAGS_TERMINATE);
1168
	ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1169

1170 1171
	/* Memory Barrier */
	wmb();
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182
	qla2x00_start_iocbs(vha, vha->req);

	qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
	    FCP_TMF_CMPL, true);
}

/* ha->hardware_lock supposed to be held on entry */
static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
	struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
{
	struct qla_hw_data *ha = vha->hw;
1183
	struct se_session *se_sess = sess->se_sess;
1184
	struct qla_tgt_mgmt_cmd *mcmd;
1185 1186
	struct se_cmd *se_cmd;
	u32 lun = 0;
1187
	int rc;
1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203
	bool found_lun = false;

	spin_lock(&se_sess->sess_cmd_lock);
	list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
		struct qla_tgt_cmd *cmd =
			container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
		if (cmd->tag == abts->exchange_addr_to_abort) {
			lun = cmd->unpacked_lun;
			found_lun = true;
			break;
		}
	}
	spin_unlock(&se_sess->sess_cmd_lock);

	if (!found_lun)
		return -ENOENT;
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
	    "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) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
		    "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));
1220
	mcmd->reset_count = vha->hw->chip_reset;
1221

1222
	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277
	    abts->exchange_addr_to_abort);
	if (rc != 0) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
		    "qla_target(%d):  tgt_ops->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 qlt_24xx_handle_abts(struct scsi_qla_host *vha,
	struct abts_recv_from_24xx *abts)
{
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess;
	uint32_t tag = abts->exchange_addr_to_abort;
	uint8_t s_id[3];
	int rc;

	if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
		    "qla_target(%d): ABTS: Abort Sequence not "
		    "supported\n", vha->vp_idx);
		qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
		return;
	}

	if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
		    "qla_target(%d): ABTS: Unknown Exchange "
		    "Address received\n", vha->vp_idx);
		qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
		return;
	}

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
	    "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));

	s_id[0] = abts->fcp_hdr_le.s_id[2];
	s_id[1] = abts->fcp_hdr_le.s_id[1];
	s_id[2] = abts->fcp_hdr_le.s_id[0];

	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
	if (!sess) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
		    "qla_target(%d): task abort for non-existant session\n",
		    vha->vp_idx);
1278
		rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304
		    QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
		if (rc != 0) {
			qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
			    false);
		}
		return;
	}

	rc = __qlt_24xx_handle_abts(vha, abts, sess);
	if (rc != 0) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
		    "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
		    vha->vp_idx, rc);
		qlt_24xx_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 qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
	struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
{
	struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
	struct ctio7_to_24xx *ctio;
1305
	uint16_t temp;
1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335

	ql_dbg(ql_dbg_tgt, ha, 0xe008,
	    "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
	    ha, atio, resp_code);

	/* Send marker if required */
	if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
		return;

	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
	if (ctio == NULL) {
		ql_dbg(ql_dbg_tgt, ha, 0xe04c,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet\n", ha->vp_idx, __func__);
		return;
	}

	ctio->entry_type = CTIO_TYPE7;
	ctio->entry_count = 1;
	ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
	ctio->nport_handle = mcmd->sess->loop_id;
	ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
	ctio->vp_index = ha->vp_idx;
	ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio->exchange_addr = atio->u.isp24.exchange_addr;
	ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
	    __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
		CTIO7_FLAGS_SEND_STATUS);
1336 1337
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio->u.status1.ox_id = cpu_to_le16(temp);
1338 1339 1340
	ctio->u.status1.scsi_status =
	    __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
	ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1341
	ctio->u.status1.sense_data[0] = resp_code;
1342

1343 1344
	/* Memory Barrier */
	wmb();
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365
	qla2x00_start_iocbs(ha, ha->req);
}

void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
{
	mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
}
EXPORT_SYMBOL(qlt_free_mcmd);

/* callback from target fabric module code */
void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
{
	struct scsi_qla_host *vha = mcmd->sess->vha;
	struct qla_hw_data *ha = vha->hw;
	unsigned long flags;

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
	    "TM response mcmd (%p) status %#x state %#x",
	    mcmd, mcmd->fc_tm_rsp, mcmd->flags);

	spin_lock_irqsave(&ha->hardware_lock, flags);
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380

	if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
		/*
		 * Either a chip reset is active or this request was from
		 * previous life, just abort the processing.
		 */
		ql_dbg(ql_dbg_async, vha, 0xe100,
			"RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
			qla2x00_reset_active(vha), mcmd->reset_count,
			ha->chip_reset);
		ha->tgt.tgt_ops->free_mcmd(mcmd);
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return;
	}

1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419
	if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
		qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
		    0, 0, 0, 0, 0, 0);
	else {
		if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
			qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
			    mcmd->fc_tm_rsp, false);
		else
			qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
			    mcmd->fc_tm_rsp);
	}
	/*
	 * Make the callback for ->free_mcmd() to queue_work() and invoke
	 * target_put_sess_cmd() to drop cmd_kref to 1.  The final
	 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
	 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
	 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
	 * qlt_xmit_tm_rsp() returns here..
	 */
	ha->tgt.tgt_ops->free_mcmd(mcmd);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
EXPORT_SYMBOL(qlt_xmit_tm_rsp);

/* No locks */
static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
{
	struct qla_tgt_cmd *cmd = prm->cmd;

	BUG_ON(cmd->sg_cnt == 0);

	prm->sg = (struct scatterlist *)cmd->sg;
	prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
	    cmd->sg_cnt, cmd->dma_data_direction);
	if (unlikely(prm->seg_cnt == 0))
		goto out_err;

	prm->cmd->sg_mapped = 1;

1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455
	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
		/*
		 * 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 += DIV_ROUND_UP(prm->seg_cnt -
			prm->tgt->datasegs_per_cmd,
			prm->tgt->datasegs_per_cont);
	} else {
		/* DIF */
		if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
		    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
			prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
			prm->tot_dsds = prm->seg_cnt;
		} else
			prm->tot_dsds = prm->seg_cnt;

		if (cmd->prot_sg_cnt) {
			prm->prot_sg      = cmd->prot_sg;
			prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
				cmd->prot_sg, cmd->prot_sg_cnt,
				cmd->dma_data_direction);
			if (unlikely(prm->prot_seg_cnt == 0))
				goto out_err;

			if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
			    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
				/* Dif Bundling not support here */
				prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
								cmd->blk_sz);
				prm->tot_dsds += prm->prot_seg_cnt;
			} else
				prm->tot_dsds += prm->prot_seg_cnt;
		}
	}
1456 1457 1458 1459 1460 1461 1462 1463 1464 1465

	return 0;

out_err:
	ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
	    "qla_target(%d): PCI mapping failed: sg_cnt=%d",
	    0, prm->cmd->sg_cnt);
	return -1;
}

J
Joern Engel 已提交
1466
static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1467 1468 1469
{
	struct qla_hw_data *ha = vha->hw;

J
Joern Engel 已提交
1470 1471 1472
	if (!cmd->sg_mapped)
		return;

1473 1474
	pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
	cmd->sg_mapped = 0;
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484

	if (cmd->prot_sg_cnt)
		pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
			cmd->dma_data_direction);

	if (cmd->ctx_dsd_alloced)
		qla2x00_clean_dsd_pool(ha, NULL, cmd);

	if (cmd->ctx)
		dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1485 1486 1487 1488 1489
}

static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
	uint32_t req_cnt)
{
1490
	uint32_t cnt, cnt_in;
1491 1492

	if (vha->req->cnt < (req_cnt + 2)) {
1493
		cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1494
		cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1495 1496 1497 1498 1499 1500 1501 1502 1503

		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))) {
1504
		ql_dbg(ql_dbg_io, vha, 0x305a,
1505 1506 1507
		    "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
		    vha->vp_idx, vha->req->ring_index,
		    vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540
		return -EAGAIN;
	}
	vha->req->cnt -= req_cnt;

	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static inline void *qlt_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 qlt_make_handle(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
	uint32_t h;

	h = ha->tgt.current_handle;
	/* always increment cmd handle */
	do {
		++h;
1541
		if (h > DEFAULT_OUTSTANDING_COMMANDS)
1542 1543
			h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
		if (h == ha->tgt.current_handle) {
1544
			ql_dbg(ql_dbg_io, vha, 0x305b,
1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567
			    "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->tgt.cmds[h-1] != NULL));

	if (h != QLA_TGT_NULL_HANDLE)
		ha->tgt.current_handle = h;

	return h;
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
	struct scsi_qla_host *vha)
{
	uint32_t h;
	struct ctio7_to_24xx *pkt;
	struct qla_hw_data *ha = vha->hw;
	struct atio_from_isp *atio = &prm->cmd->atio;
1568
	uint16_t temp;
1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596

	pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
	prm->pkt = pkt;
	memset(pkt, 0, sizeof(*pkt));

	pkt->entry_type = CTIO_TYPE7;
	pkt->entry_count = (uint8_t)prm->req_cnt;
	pkt->vp_index = vha->vp_idx;

	h = qlt_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.
		 */
		return -EAGAIN;
	} else
		ha->tgt.cmds[h-1] = prm->cmd;

	pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
	pkt->nport_handle = prm->cmd->loop_id;
	pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
	pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	pkt->exchange_addr = atio->u.isp24.exchange_addr;
	pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1597 1598
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	pkt->u.status0.ox_id = cpu_to_le16(temp);
1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735
	pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);

	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 qlt_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 *)qlt_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));

			prm->sg = sg_next(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 qlt_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;
	struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;

	pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);

	/* Setup packet address segment pointer */
	dword_ptr = pkt24->u.status0.dseg_0_address;

	/* Set total data segment count */
	if (prm->seg_cnt)
		pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);

	if (prm->seg_cnt == 0) {
		/* No data transfer */
		*dword_ptr++ = 0;
		*dword_ptr = 0;
		return;
	}

	/* If scatter gather */

	/* 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));

		prm->sg = sg_next(prm->sg);
	}

	qlt_load_cont_data_segments(prm, vha);
}

static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
{
	return cmd->bufflen > 0;
}

/*
 * Called without ha->hardware_lock held
 */
static int qlt_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)) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
		    "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;
1736
		cmd->cmd_flags |= BIT_6;
1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766

		qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);

		/* !! At this point cmd could be already freed !! */
		return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
	}

	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;

	/* Send marker if required */
	if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
		return -EFAULT;

	if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
		if  (qlt_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;
1767
		ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1768 1769 1770 1771 1772 1773 1774
		    "Residual underflow: %d (tag %d, "
		    "op %x, bufflen %d, rq_result %x)\n", prm->residual,
		    cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 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;
1775
		ql_dbg(ql_dbg_io, vha, 0x305d,
1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968
		    "Residual overflow: %d (tag %d, "
		    "op %x, bufflen %d, rq_result %x)\n", prm->residual,
		    cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
		    cmd->bufflen, prm->rq_result);
		prm->rq_result |= SS_RESIDUAL_OVER;
	}

	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 (qlt_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)++;
			}
		}
	}

	return 0;
}

static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
	struct qla_tgt_cmd *cmd, int sending_sense)
{
	if (ha->tgt.enable_class_2)
		return 0;

	if (sending_sense)
		return cmd->conf_compl_supported;
	else
		return ha->tgt.enable_explicit_conf &&
		    cmd->conf_compl_supported;
}

#ifdef CONFIG_QLA_TGT_DEBUG_SRR
/*
 *  Original taken from the XFS code
 */
static unsigned long qlt_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 qlt_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) && (qlt_srr_random() % 200)
	    == 50) {
		*xmit_type &= ~QLA_TGT_XMIT_STATUS;
		ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
		    "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
	}
#endif
	/*
	 * It's currently not possible to simulate SRRs for FCP_WRITE without
	 * a physical link layer failure, so don't even try here..
	 */
	if (cmd->dma_data_direction != DMA_FROM_DEVICE)
		return;

	if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
	    ((qlt_srr_random() % 100) == 20)) {
		int i, leave = 0;
		unsigned int tot_len = 0;

		while (leave == 0)
			leave = qlt_srr_random() % cmd->sg_cnt;

		for (i = 0; i < leave; i++)
			tot_len += cmd->sg[i].length;

		ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
		    "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 (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
		unsigned int offset = qlt_srr_random() % cmd->bufflen;

		ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
		    "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 (qlt_set_data_offset(cmd, offset)) {
			ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
			    "qlt_set_data_offset() failed (tag %d)", cmd->tag);
		}
	}
}
#else
static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
{}
#endif

static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
	struct qla_tgt_prm *prm)
{
	prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
	    (uint32_t)sizeof(ctio->u.status1.sense_data));
	ctio->u.status0.flags |=
	    __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
	if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
		ctio->u.status0.flags |= __constant_cpu_to_le16(
		    CTIO7_FLAGS_EXPLICIT_CONFORM |
		    CTIO7_FLAGS_CONFORM_REQ);
	}
	ctio->u.status0.residual = cpu_to_le32(prm->residual);
	ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
	if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
		int i;

		if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
			if (prm->cmd->se_cmd.scsi_status != 0) {
				ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
				    "Skipping EXPLICIT_CONFORM and "
				    "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
				    "non GOOD status\n");
				goto skip_explict_conf;
			}
			ctio->u.status1.flags |= __constant_cpu_to_le16(
			    CTIO7_FLAGS_EXPLICIT_CONFORM |
			    CTIO7_FLAGS_CONFORM_REQ);
		}
skip_explict_conf:
		ctio->u.status1.flags &=
		    ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
		ctio->u.status1.flags |=
		    __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
		ctio->u.status1.scsi_status |=
		    __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
		ctio->u.status1.sense_length =
		    cpu_to_le16(prm->sense_buffer_len);
		for (i = 0; i < prm->sense_buffer_len/4; i++)
			((uint32_t *)ctio->u.status1.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) {
				ql_dbg(ql_dbg_tgt, vha, 0xe04f,
				    "qla_target(%d): %d bytes of sense "
				    "lost", prm->tgt->ha->vp_idx,
				    prm->sense_buffer_len % 4);
				q++;
			}
		}
#endif
	} else {
		ctio->u.status1.flags &=
		    ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
		ctio->u.status1.flags |=
		    __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
		ctio->u.status1.sense_length = 0;
		memset(ctio->u.status1.sense_data, 0,
		    sizeof(ctio->u.status1.sense_data));
	}

	/* Sense with len > 24, is it possible ??? */
}

1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014


/* diff  */
static inline int
qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
{
	/*
	 * Uncomment when corresponding SCSI changes are done.
	 *
	 if (!sp->cmd->prot_chk)
	 return 0;
	 *
	 */
	switch (se_cmd->prot_op) {
	case TARGET_PROT_DOUT_INSERT:
	case TARGET_PROT_DIN_STRIP:
		if (ql2xenablehba_err_chk >= 1)
			return 1;
		break;
	case TARGET_PROT_DOUT_PASS:
	case TARGET_PROT_DIN_PASS:
		if (ql2xenablehba_err_chk >= 2)
			return 1;
		break;
	case TARGET_PROT_DIN_INSERT:
	case TARGET_PROT_DOUT_STRIP:
		return 1;
	default:
		break;
	}
	return 0;
}

/*
 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
 *
 */
static inline void
qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
{
	uint32_t lba = 0xffffffff & se_cmd->t_task_lba;

	/* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
	 * have been immplemented by TCM, before AppTag is avail.
	 * Look for modesense_handlers[]
	 */
2015
	ctx->app_tag = 0;
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	ctx->app_tag_mask[0] = 0x0;
	ctx->app_tag_mask[1] = 0x0;

	switch (se_cmd->prot_type) {
	case TARGET_DIF_TYPE0_PROT:
		/*
		 * No check for ql2xenablehba_err_chk, as it would be an
		 * I/O error if hba tag generation is not done.
		 */
		ctx->ref_tag = cpu_to_le32(lba);

		if (!qlt_hba_err_chk_enabled(se_cmd))
			break;

		/* enable ALL bytes of the ref tag */
		ctx->ref_tag_mask[0] = 0xff;
		ctx->ref_tag_mask[1] = 0xff;
		ctx->ref_tag_mask[2] = 0xff;
		ctx->ref_tag_mask[3] = 0xff;
		break;
	/*
	 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
	 * 16 bit app tag.
	 */
	case TARGET_DIF_TYPE1_PROT:
		ctx->ref_tag = cpu_to_le32(lba);

		if (!qlt_hba_err_chk_enabled(se_cmd))
			break;

		/* enable ALL bytes of the ref tag */
		ctx->ref_tag_mask[0] = 0xff;
		ctx->ref_tag_mask[1] = 0xff;
		ctx->ref_tag_mask[2] = 0xff;
		ctx->ref_tag_mask[3] = 0xff;
		break;
	/*
	 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
	 * match LBA in CDB + N
	 */
	case TARGET_DIF_TYPE2_PROT:
		ctx->ref_tag = cpu_to_le32(lba);

		if (!qlt_hba_err_chk_enabled(se_cmd))
			break;

		/* enable ALL bytes of the ref tag */
		ctx->ref_tag_mask[0] = 0xff;
		ctx->ref_tag_mask[1] = 0xff;
		ctx->ref_tag_mask[2] = 0xff;
		ctx->ref_tag_mask[3] = 0xff;
		break;

	/* For Type 3 protection: 16 bit GUARD only */
	case TARGET_DIF_TYPE3_PROT:
		ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
			ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
		break;
	}
}


static inline int
qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
{
	uint32_t		*cur_dsd;
	int			sgc;
	uint32_t		transfer_length = 0;
	uint32_t		data_bytes;
	uint32_t		dif_bytes;
	uint8_t			bundling = 1;
	uint8_t			*clr_ptr;
	struct crc_context	*crc_ctx_pkt = NULL;
	struct qla_hw_data	*ha;
	struct ctio_crc2_to_fw	*pkt;
	dma_addr_t		crc_ctx_dma;
	uint16_t		fw_prot_opts = 0;
	struct qla_tgt_cmd	*cmd = prm->cmd;
	struct se_cmd		*se_cmd = &cmd->se_cmd;
	uint32_t h;
	struct atio_from_isp *atio = &prm->cmd->atio;
2097
	uint16_t t16;
2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193

	sgc = 0;
	ha = vha->hw;

	pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
	prm->pkt = pkt;
	memset(pkt, 0, sizeof(*pkt));

	ql_dbg(ql_dbg_tgt, vha, 0xe071,
		"qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
		vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
		prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);

	if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
	    (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
		bundling = 0;

	/* Compute dif len and adjust data len to incude protection */
	data_bytes = cmd->bufflen;
	dif_bytes  = (data_bytes / cmd->blk_sz) * 8;

	switch (se_cmd->prot_op) {
	case TARGET_PROT_DIN_INSERT:
	case TARGET_PROT_DOUT_STRIP:
		transfer_length = data_bytes;
		data_bytes += dif_bytes;
		break;

	case TARGET_PROT_DIN_STRIP:
	case TARGET_PROT_DOUT_INSERT:
	case TARGET_PROT_DIN_PASS:
	case TARGET_PROT_DOUT_PASS:
		transfer_length = data_bytes + dif_bytes;
		break;

	default:
		BUG();
		break;
	}

	if (!qlt_hba_err_chk_enabled(se_cmd))
		fw_prot_opts |= 0x10; /* Disable Guard tag checking */
	/* HBA error checking enabled */
	else if (IS_PI_UNINIT_CAPABLE(ha)) {
		if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
		    (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
			fw_prot_opts |= PO_DIS_VALD_APP_ESC;
		else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
			fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
	}

	switch (se_cmd->prot_op) {
	case TARGET_PROT_DIN_INSERT:
	case TARGET_PROT_DOUT_INSERT:
		fw_prot_opts |= PO_MODE_DIF_INSERT;
		break;
	case TARGET_PROT_DIN_STRIP:
	case TARGET_PROT_DOUT_STRIP:
		fw_prot_opts |= PO_MODE_DIF_REMOVE;
		break;
	case TARGET_PROT_DIN_PASS:
	case TARGET_PROT_DOUT_PASS:
		fw_prot_opts |= PO_MODE_DIF_PASS;
		/* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
		break;
	default:/* Normal Request */
		fw_prot_opts |= PO_MODE_DIF_PASS;
		break;
	}


	/* ---- PKT ---- */
	/* Update entry type to indicate Command Type CRC_2 IOCB */
	pkt->entry_type  = CTIO_CRC2;
	pkt->entry_count = 1;
	pkt->vp_index = vha->vp_idx;

	h = qlt_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.
		 */
		return -EAGAIN;
	} else
		ha->tgt.cmds[h-1] = prm->cmd;


	pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
	pkt->nport_handle = prm->cmd->loop_id;
	pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
	pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2194 2195 2196 2197 2198 2199 2200

	/* silence compile warning */
	t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	pkt->ox_id  = cpu_to_le16(t16);

	t16 = (atio->u.isp24.attr << 9);
	pkt->flags |= cpu_to_le16(t16);
2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274
	pkt->relative_offset = cpu_to_le32(prm->cmd->offset);

	/* Set transfer direction */
	if (cmd->dma_data_direction == DMA_TO_DEVICE)
		pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
	else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
		pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);


	pkt->dseg_count = prm->tot_dsds;
	/* Fibre channel byte count */
	pkt->transfer_length = cpu_to_le32(transfer_length);


	/* ----- CRC context -------- */

	/* Allocate CRC context from global pool */
	crc_ctx_pkt = cmd->ctx =
	    dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);

	if (!crc_ctx_pkt)
		goto crc_queuing_error;

	/* Zero out CTX area. */
	clr_ptr = (uint8_t *)crc_ctx_pkt;
	memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));

	crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
	INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);

	/* Set handle */
	crc_ctx_pkt->handle = pkt->handle;

	qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);

	pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
	pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
	pkt->crc_context_len = CRC_CONTEXT_LEN_FW;


	if (!bundling) {
		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
	} else {
		/*
		 * Configure Bundling if we need to fetch interlaving
		 * protection PCI accesses
		 */
		fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
		crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
		crc_ctx_pkt->u.bundling.dseg_count =
			cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
	}

	/* Finish the common fields of CRC pkt */
	crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
	crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
	crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
	crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);


	/* Walks data segments */
	pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);

	if (!bundling && prm->prot_seg_cnt) {
		if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
			prm->tot_dsds, cmd))
			goto crc_queuing_error;
	} else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
		(prm->tot_dsds - prm->prot_seg_cnt), cmd))
		goto crc_queuing_error;

	if (bundling && prm->prot_seg_cnt) {
		/* Walks dif segments */
2275
		pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290

		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
		if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
			prm->prot_seg_cnt, cmd))
			goto crc_queuing_error;
	}
	return QLA_SUCCESS;

crc_queuing_error:
	/* Cleanup will be performed by the caller */

	return QLA_FUNCTION_FAILED;
}


2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309
/*
 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
 */
int qlt_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 ctio7_to_24xx *pkt;
	struct qla_tgt_prm prm;
	uint32_t full_req_cnt = 0;
	unsigned long flags = 0;
	int res;

	memset(&prm, 0, sizeof(prm));
	qlt_check_srr_debug(cmd, &xmit_type);

	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2310 2311 2312 2313
	    "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
	    (xmit_type & QLA_TGT_XMIT_STATUS) ?
	    1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
	    &cmd->se_cmd);
2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325

	res = qlt_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;
	}

	spin_lock_irqsave(&ha->hardware_lock, flags);

2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340
	if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
		/*
		 * Either a chip reset is active or this request was from
		 * previous life, just abort the processing.
		 */
		cmd->state = QLA_TGT_STATE_PROCESSED;
		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
		ql_dbg(ql_dbg_async, vha, 0xe101,
			"RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
			qla2x00_reset_active(vha), cmd->reset_count,
			ha->chip_reset);
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return 0;
	}

2341 2342 2343 2344 2345
	/* Does F/W have an IOCBs for this request */
	res = qlt_check_reserve_free_req(vha, full_req_cnt);
	if (unlikely(res))
		goto out_unmap_unlock;

2346 2347 2348 2349
	if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
		res = qlt_build_ctio_crc2_pkt(&prm, vha);
	else
		res = qlt_24xx_build_ctio_pkt(&prm, vha);
2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360
	if (unlikely(res != 0))
		goto out_unmap_unlock;


	pkt = (struct ctio7_to_24xx *)prm.pkt;

	if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
		pkt->u.status0.flags |=
		    __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
			CTIO7_FLAGS_STATUS_MODE_0);

2361 2362
		if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
			qlt_load_data_segments(&prm, vha);
2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388

		if (prm.add_status_pkt == 0) {
			if (xmit_type & QLA_TGT_XMIT_STATUS) {
				pkt->u.status0.scsi_status =
				    cpu_to_le16(prm.rq_result);
				pkt->u.status0.residual =
				    cpu_to_le32(prm.residual);
				pkt->u.status0.flags |= __constant_cpu_to_le16(
				    CTIO7_FLAGS_SEND_STATUS);
				if (qlt_need_explicit_conf(ha, cmd, 0)) {
					pkt->u.status0.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().
			 */
			struct ctio7_to_24xx *ctio =
				(struct ctio7_to_24xx *)qlt_get_req_pkt(vha);

2389 2390 2391
			ql_dbg(ql_dbg_io, vha, 0x305e,
			    "Building additional status packet 0x%p.\n",
			    ctio);
2392

2393 2394 2395 2396
			/*
			 * T10Dif: ctio_crc2_to_fw overlay ontop of
			 * ctio7_to_24xx
			 */
2397
			memcpy(ctio, pkt, sizeof(*ctio));
2398
			/* reset back to CTIO7 */
2399
			ctio->entry_count = 1;
2400
			ctio->entry_type = CTIO_TYPE7;
2401 2402 2403 2404 2405 2406 2407 2408
			ctio->dseg_count = 0;
			ctio->u.status1.flags &= ~__constant_cpu_to_le16(
			    CTIO7_FLAGS_DATA_IN);

			/* Real finish is ctio_m1's finish */
			pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
			pkt->u.status0.flags |= __constant_cpu_to_le16(
			    CTIO7_FLAGS_DONT_RET_CTIO);
2409 2410 2411 2412 2413

			/* qlt_24xx_init_ctio_to_isp will correct
			 * all neccessary fields that's part of CTIO7.
			 * There should be no residual of CTIO-CRC2 data.
			 */
2414 2415 2416 2417 2418 2419 2420 2421 2422
			qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
			    &prm);
			pr_debug("Status CTIO7: %p\n", ctio);
		}
	} else
		qlt_24xx_init_ctio_to_isp(pkt, &prm);


	cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2423
	cmd->cmd_sent_to_fw = 1;
2424

2425 2426
	/* Memory Barrier */
	wmb();
2427 2428 2429 2430 2431 2432
	qla2x00_start_iocbs(vha, vha->req);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return 0;

out_unmap_unlock:
J
Joern Engel 已提交
2433
	qlt_unmap_sg(vha, cmd);
2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return res;
}
EXPORT_SYMBOL(qlt_xmit_response);

int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
{
	struct ctio7_to_24xx *pkt;
	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;
	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 (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
		return -EIO;

	/* Calculate number of entries and segments required */
	if (qlt_pci_map_calc_cnt(&prm) != 0)
		return -EAGAIN;

	spin_lock_irqsave(&ha->hardware_lock, flags);

2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480
	if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
		/*
		 * Either a chip reset is active or this request was from
		 * previous life, just abort the processing.
		 */
		cmd->state = QLA_TGT_STATE_NEED_DATA;
		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
		ql_dbg(ql_dbg_async, vha, 0xe102,
			"RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
			qla2x00_reset_active(vha), cmd->reset_count,
			ha->chip_reset);
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return 0;
	}

2481 2482 2483 2484
	/* Does F/W have an IOCBs for this request */
	res = qlt_check_reserve_free_req(vha, prm.req_cnt);
	if (res != 0)
		goto out_unlock_free_unmap;
2485 2486 2487 2488
	if (cmd->se_cmd.prot_op)
		res = qlt_build_ctio_crc2_pkt(&prm, vha);
	else
		res = qlt_24xx_build_ctio_pkt(&prm, vha);
2489 2490 2491 2492 2493 2494

	if (unlikely(res != 0))
		goto out_unlock_free_unmap;
	pkt = (struct ctio7_to_24xx *)prm.pkt;
	pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
	    CTIO7_FLAGS_STATUS_MODE_0);
2495 2496 2497

	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
		qlt_load_data_segments(&prm, vha);
2498 2499

	cmd->state = QLA_TGT_STATE_NEED_DATA;
2500
	cmd->cmd_sent_to_fw = 1;
2501

2502 2503
	/* Memory Barrier */
	wmb();
2504 2505 2506 2507 2508 2509
	qla2x00_start_iocbs(vha, vha->req);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return res;

out_unlock_free_unmap:
J
Joern Engel 已提交
2510
	qlt_unmap_sg(vha, cmd);
2511 2512 2513 2514 2515 2516
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return res;
}
EXPORT_SYMBOL(qlt_rdy_to_xfer);

2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544

/*
 * Checks the guard or meta-data for the type of error
 * detected by the HBA.
 */
static inline int
qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
		struct ctio_crc_from_fw *sts)
{
	uint8_t		*ap = &sts->actual_dif[0];
	uint8_t		*ep = &sts->expected_dif[0];
	uint32_t	e_ref_tag, a_ref_tag;
	uint16_t	e_app_tag, a_app_tag;
	uint16_t	e_guard, a_guard;
	uint64_t	lba = cmd->se_cmd.t_task_lba;

	a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
	a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
	a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));

	e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
	e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
	e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));

	ql_dbg(ql_dbg_tgt, vha, 0xe075,
	    "iocb(s) %p Returned STATUS.\n", sts);

	ql_dbg(ql_dbg_tgt, vha, 0xf075,
2545
	    "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653
	    cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
	    a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);

	/*
	 * Ignore sector if:
	 * For type     3: ref & app tag is all 'f's
	 * For type 0,1,2: app tag is all 'f's
	 */
	if ((a_app_tag == 0xffff) &&
	    ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
	     (a_ref_tag == 0xffffffff))) {
		uint32_t blocks_done;

		/* 2TB boundary case covered automatically with this */
		blocks_done = e_ref_tag - (uint32_t)lba + 1;
		cmd->se_cmd.bad_sector = e_ref_tag;
		cmd->se_cmd.pi_err = 0;
		ql_dbg(ql_dbg_tgt, vha, 0xf074,
			"need to return scsi good\n");

		/* Update protection tag */
		if (cmd->prot_sg_cnt) {
			uint32_t i, j = 0, k = 0, num_ent;
			struct scatterlist *sg, *sgl;


			sgl = cmd->prot_sg;

			/* Patch the corresponding protection tags */
			for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
				num_ent = sg_dma_len(sg) / 8;
				if (k + num_ent < blocks_done) {
					k += num_ent;
					continue;
				}
				j = blocks_done - k - 1;
				k = blocks_done;
				break;
			}

			if (k != blocks_done) {
				ql_log(ql_log_warn, vha, 0xf076,
				    "unexpected tag values tag:lba=%u:%llu)\n",
				    e_ref_tag, (unsigned long long)lba);
				goto out;
			}

#if 0
			struct sd_dif_tuple *spt;
			/* TODO:
			 * This section came from initiator. Is it valid here?
			 * should ulp be override with actual val???
			 */
			spt = page_address(sg_page(sg)) + sg->offset;
			spt += j;

			spt->app_tag = 0xffff;
			if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
				spt->ref_tag = 0xffffffff;
#endif
		}

		return 0;
	}

	/* check guard */
	if (e_guard != a_guard) {
		cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
		cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;

		ql_log(ql_log_warn, vha, 0xe076,
		    "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
		    cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
		    a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
		    a_guard, e_guard, cmd);
		goto out;
	}

	/* check ref tag */
	if (e_ref_tag != a_ref_tag) {
		cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
		cmd->se_cmd.bad_sector = e_ref_tag;

		ql_log(ql_log_warn, vha, 0xe077,
			"Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
			cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
			a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
			a_guard, e_guard, cmd);
		goto out;
	}

	/* check appl tag */
	if (e_app_tag != a_app_tag) {
		cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
		cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;

		ql_log(ql_log_warn, vha, 0xe078,
			"App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
			cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
			a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
			a_guard, e_guard, cmd);
		goto out;
	}
out:
	return 1;
}


2654 2655 2656 2657 2658 2659 2660 2661 2662 2663
/* If hardware_lock held on entry, might drop it, then reaquire */
/* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
	struct qla_tgt_cmd *cmd,
	struct atio_from_isp *atio)
{
	struct ctio7_to_24xx *ctio24;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	int ret = 0;
2664
	uint16_t temp;
2665 2666 2667

	ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);

2668
	pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700
	if (pkt == NULL) {
		ql_dbg(ql_dbg_tgt, vha, 0xe050,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet\n", vha->vp_idx, __func__);
		return -ENOMEM;
	}

	if (cmd != NULL) {
		if (cmd->state < QLA_TGT_STATE_PROCESSED) {
			ql_dbg(ql_dbg_tgt, vha, 0xe051,
			    "qla_target(%d): Terminating cmd %p with "
			    "incorrect state %d\n", vha->vp_idx, cmd,
			    cmd->state);
		} else
			ret = 1;
	}

	pkt->entry_count = 1;
	pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;

	ctio24 = (struct ctio7_to_24xx *)pkt;
	ctio24->entry_type = CTIO_TYPE7;
	ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
	ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
	ctio24->vp_index = vha->vp_idx;
	ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
	ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
	    __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
		CTIO7_FLAGS_TERMINATE);
2701 2702
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio24->u.status1.ox_id = cpu_to_le16(temp);
2703 2704 2705 2706 2707 2708 2709 2710

	/* Most likely, it isn't needed */
	ctio24->u.status1.residual = get_unaligned((uint32_t *)
	    &atio->u.isp24.fcp_cmnd.add_cdb[
	    atio->u.isp24.fcp_cmnd.add_cdb_len]);
	if (ctio24->u.status1.residual != 0)
		ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;

2711 2712
	/* Memory Barrier */
	wmb();
2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727
	qla2x00_start_iocbs(vha, vha->req);
	return ret;
}

static void qlt_send_term_exchange(struct scsi_qla_host *vha,
	struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
{
	unsigned long flags;
	int rc;

	if (qlt_issue_marker(vha, ha_locked) < 0)
		return;

	if (ha_locked) {
		rc = __qlt_send_term_exchange(vha, cmd, atio);
2728 2729
		if (rc == -ENOMEM)
			qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2730 2731 2732 2733
		goto done;
	}
	spin_lock_irqsave(&vha->hw->hardware_lock, flags);
	rc = __qlt_send_term_exchange(vha, cmd, atio);
2734 2735
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2736
	spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2737

2738
done:
2739 2740
	if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
	    !cmd->cmd_sent_to_fw)) {
2741 2742 2743
		if (!ha_locked && !in_interrupt())
			msleep(250); /* just in case */

J
Joern Engel 已提交
2744
		qlt_unmap_sg(vha, cmd);
2745 2746
		vha->hw->tgt.tgt_ops->free_cmd(cmd);
	}
2747
	return;
2748 2749
}

2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796
static void qlt_init_term_exchange(struct scsi_qla_host *vha)
{
	struct list_head free_list;
	struct qla_tgt_cmd *cmd, *tcmd;

	vha->hw->tgt.leak_exchg_thresh_hold =
	    (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;

	cmd = tcmd = NULL;
	if (!list_empty(&vha->hw->tgt.q_full_list)) {
		INIT_LIST_HEAD(&free_list);
		list_splice_init(&vha->hw->tgt.q_full_list, &free_list);

		list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
			list_del(&cmd->cmd_list);
			/* This cmd was never sent to TCM.  There is no need
			 * to schedule free or call free_cmd
			 */
			qlt_free_cmd(cmd);
			vha->hw->tgt.num_qfull_cmds_alloc--;
		}
	}
	vha->hw->tgt.num_qfull_cmds_dropped = 0;
}

static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
{
	uint32_t total_leaked;

	total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;

	if (vha->hw->tgt.leak_exchg_thresh_hold &&
	    (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {

		ql_dbg(ql_dbg_tgt, vha, 0xe079,
		    "Chip reset due to exchange starvation: %d/%d.\n",
		    total_leaked, vha->hw->fw_xcb_count);

		if (IS_P3P_TYPE(vha->hw))
			set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
		else
			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		qla2xxx_wake_dpc(vha);
	}

}

2797 2798
void qlt_free_cmd(struct qla_tgt_cmd *cmd)
{
2799 2800
	struct qla_tgt_sess *sess = cmd->sess;

2801 2802 2803 2804
	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
	    "%s: se_cmd[%p] ox_id %04x\n",
	    __func__, &cmd->se_cmd,
	    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2805

2806 2807
	BUG_ON(cmd->cmd_in_wq);

2808 2809 2810
	if (!cmd->q_full)
		qlt_decr_num_pend_cmds(cmd->vha);

2811
	BUG_ON(cmd->sg_mapped);
2812
	cmd->jiffies_at_free = get_jiffies_64();
2813 2814
	if (unlikely(cmd->free_sg))
		kfree(cmd->sg);
2815 2816 2817 2818 2819

	if (!sess || !sess->se_sess) {
		WARN_ON(1);
		return;
	}
2820
	cmd->jiffies_at_free = get_jiffies_64();
2821
	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2822 2823 2824 2825 2826 2827 2828 2829
}
EXPORT_SYMBOL(qlt_free_cmd);

/* ha->hardware_lock supposed to be held on entry */
static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
	struct qla_tgt_cmd *cmd, void *ctio)
{
	struct qla_tgt_srr_ctio *sc;
2830
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2831 2832 2833
	struct qla_tgt_srr_imm *imm;

	tgt->ctio_srr_id++;
2834
	cmd->cmd_flags |= BIT_15;
2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
	    "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);

	if (!ctio) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
		    "qla_target(%d): SRR CTIO, but ctio is NULL\n",
		    vha->vp_idx);
		return -EINVAL;
	}

	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);
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
		    "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) {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
				    "Scheduling srr work\n");
				schedule_work(&tgt->srr_work);
			} else {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
				    "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 qla_tgt_srr_imm *ti;

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
		    "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) {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
				    "IMM SRR %p deleted (id %d)\n",
				    imm, imm->srr_id);
				list_del(&imm->srr_list_entry);
				qlt_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 qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
	struct qla_tgt_cmd *cmd, uint32_t status)
{
	int term = 0;

	if (ctio != NULL) {
		struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
		term = !(c->flags &
		    __constant_cpu_to_le16(OF_TERM_EXCH));
	} else
		term = 1;

	if (term)
		qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);

	return term;
}

/* ha->hardware_lock supposed to be held on entry */
static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
	uint32_t handle)
{
	struct qla_hw_data *ha = vha->hw;

	handle--;
	if (ha->tgt.cmds[handle] != NULL) {
		struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
		ha->tgt.cmds[handle] = NULL;
		return cmd;
	} else
		return NULL;
}

/* ha->hardware_lock supposed to be held on entry */
static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
	uint32_t handle, void *ctio)
{
	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) {
2956
		if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2957
			return NULL;
2958

2959
		/* handle-1 is actually used */
2960
		if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984
			ql_dbg(ql_dbg_tgt, vha, 0xe052,
			    "qla_target(%d): Wrong handle %x received\n",
			    vha->vp_idx, handle);
			return NULL;
		}
		cmd = qlt_get_cmd(vha, handle);
		if (unlikely(cmd == NULL)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe053,
			    "qla_target(%d): Suspicious: unable to "
			    "find the command with handle %x\n", vha->vp_idx,
			    handle);
			return NULL;
		}
	} else if (ctio != NULL) {
		/* We can't get loop ID from CTIO7 */
		ql_dbg(ql_dbg_tgt, vha, 0xe054,
		    "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
		    "support NULL handles\n", vha->vp_idx);
		return NULL;
	}

	return cmd;
}

2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019
/* hardware_lock should be held by caller. */
static void
qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
{
	struct qla_hw_data *ha = vha->hw;
	uint32_t handle;

	if (cmd->sg_mapped)
		qlt_unmap_sg(vha, cmd);

	handle = qlt_make_handle(vha);

	/* TODO: fix debug message type and ids. */
	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
		ql_dbg(ql_dbg_io, vha, 0xff00,
		    "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
		cmd->write_data_transferred = 0;
		cmd->state = QLA_TGT_STATE_DATA_IN;

		ql_dbg(ql_dbg_io, vha, 0xff01,
		    "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);

		ha->tgt.tgt_ops->handle_data(cmd);
		return;
	} else if (cmd->state == QLA_TGT_STATE_ABORTED) {
		ql_dbg(ql_dbg_io, vha, 0xff02,
		    "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
	} else {
		ql_dbg(ql_dbg_io, vha, 0xff03,
		    "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
		    cmd->state);
		dump_stack();
	}

3020
	cmd->cmd_flags |= BIT_12;
3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059
	ha->tgt.tgt_ops->free_cmd(cmd);
}

void
qlt_host_reset_handler(struct qla_hw_data *ha)
{
	struct qla_tgt_cmd *cmd;
	unsigned long flags;
	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
	scsi_qla_host_t *vha = NULL;
	struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
	uint32_t i;

	if (!base_vha->hw->tgt.tgt_ops)
		return;

	if (!tgt || qla_ini_mode_enabled(base_vha)) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
			"Target mode disabled\n");
		return;
	}

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
	    "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
	    base_vha->dpc_flags);

	spin_lock_irqsave(&ha->hardware_lock, flags);
	for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
		cmd = qlt_get_cmd(base_vha, i);
		if (!cmd)
			continue;
		/* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
		vha = cmd->vha;
		qlt_abort_cmd_on_host_reset(vha, cmd);
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
}


3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081
/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_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;

	if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
		/* That could happen only in case of an error/reset/abort */
		if (status != CTIO_SUCCESS) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
			    "Intermediate CTIO received"
			    " (status %x)\n", status);
		}
		return;
	}

	cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3082
	if (cmd == NULL)
3083
		return;
3084

3085 3086
	se_cmd = &cmd->se_cmd;
	tfo = se_cmd->se_tfo;
3087
	cmd->cmd_sent_to_fw = 0;
3088

J
Joern Engel 已提交
3089
	qlt_unmap_sg(vha, cmd);
3090 3091 3092 3093 3094 3095

	if (unlikely(status != CTIO_SUCCESS)) {
		switch (status & 0xFFFF) {
		case CTIO_LIP_RESET:
		case CTIO_TARGET_RESET:
		case CTIO_ABORTED:
3096
			/* driver request abort via Terminate exchange */
3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126
		case CTIO_TIMEOUT:
		case CTIO_INVALID_RX_ID:
			/* They are OK */
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
			    "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:
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
			    "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:
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
			    "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 (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
				break;
			else
				return;

3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157
		case CTIO_DIF_ERROR: {
			struct ctio_crc_from_fw *crc =
				(struct ctio_crc_from_fw *)ctio;
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
			    "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
			    vha->vp_idx, status, cmd->state, se_cmd,
			    *((u64 *)&crc->actual_dif[0]),
			    *((u64 *)&crc->expected_dif[0]));

			if (qlt_handle_dif_error(vha, cmd, ctio)) {
				if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
					/* scsi Write/xfer rdy complete */
					goto skip_term;
				} else {
					/* scsi read/xmit respond complete
					 * call handle dif to send scsi status
					 * rather than terminate exchange.
					 */
					cmd->state = QLA_TGT_STATE_PROCESSED;
					ha->tgt.tgt_ops->handle_dif_err(cmd);
					return;
				}
			} else {
				/* Need to generate a SCSI good completion.
				 * because FW did not send scsi status.
				 */
				status = 0;
				goto skip_term;
			}
			break;
		}
3158 3159
		default:
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3160
			    "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3161 3162 3163 3164
			    vha->vp_idx, status, cmd->state, se_cmd);
			break;
		}

3165 3166 3167 3168 3169 3170 3171 3172

		/* "cmd->state == QLA_TGT_STATE_ABORTED" means
		 * cmd is already aborted/terminated, we don't
		 * need to terminate again.  The exchange is already
		 * cleaned up/freed at FW level.  Just cleanup at driver
		 * level.
		 */
		if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3173
		    (cmd->state != QLA_TGT_STATE_ABORTED)) {
3174
			cmd->cmd_flags |= BIT_13;
3175 3176
			if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
				return;
3177
		}
3178
	}
3179
skip_term:
3180 3181

	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3182
		;
3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203
	} 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;

		ha->tgt.tgt_ops->handle_data(cmd);
		return;
	} else if (cmd->state == QLA_TGT_STATE_ABORTED) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
		    "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
	} else {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
		    "qla_target(%d): A command in state (%d) should "
		    "not return a CTIO complete\n", vha->vp_idx, cmd->state);
	}

3204 3205
	if (unlikely(status != CTIO_SUCCESS) &&
		(cmd->state != QLA_TGT_STATE_ABORTED)) {
3206 3207 3208 3209
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
		dump_stack();
	}

3210

3211 3212 3213 3214 3215 3216 3217 3218 3219 3220
	ha->tgt.tgt_ops->free_cmd(cmd);
}

static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
	uint8_t task_codes)
{
	int fcp_task_attr;

	switch (task_codes) {
	case ATIO_SIMPLE_QUEUE:
C
Christoph Hellwig 已提交
3221
		fcp_task_attr = TCM_SIMPLE_TAG;
3222 3223
		break;
	case ATIO_HEAD_OF_QUEUE:
C
Christoph Hellwig 已提交
3224
		fcp_task_attr = TCM_HEAD_TAG;
3225 3226
		break;
	case ATIO_ORDERED_QUEUE:
C
Christoph Hellwig 已提交
3227
		fcp_task_attr = TCM_ORDERED_TAG;
3228 3229
		break;
	case ATIO_ACA_QUEUE:
C
Christoph Hellwig 已提交
3230
		fcp_task_attr = TCM_ACA_TAG;
3231 3232
		break;
	case ATIO_UNTAGGED:
C
Christoph Hellwig 已提交
3233
		fcp_task_attr = TCM_SIMPLE_TAG;
3234 3235 3236 3237 3238
		break;
	default:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
		    "qla_target: unknown task code %x, use ORDERED instead\n",
		    task_codes);
C
Christoph Hellwig 已提交
3239
		fcp_task_attr = TCM_ORDERED_TAG;
3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250
		break;
	}

	return fcp_task_attr;
}

static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
					uint8_t *);
/*
 * Process context for I/O path into tcm_qla2xxx code
 */
3251
static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3252 3253 3254
{
	scsi_qla_host_t *vha = cmd->vha;
	struct qla_hw_data *ha = vha->hw;
3255
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3256
	struct qla_tgt_sess *sess = cmd->sess;
3257 3258 3259 3260 3261 3262
	struct atio_from_isp *atio = &cmd->atio;
	unsigned char *cdb;
	unsigned long flags;
	uint32_t data_length;
	int ret, fcp_task_attr, data_dir, bidi = 0;

3263 3264
	cmd->cmd_in_wq = 0;
	cmd->cmd_flags |= BIT_1;
3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289
	if (tgt->tgt_stop)
		goto out_term;

	cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
	cmd->tag = atio->u.isp24.exchange_addr;
	cmd->unpacked_lun = scsilun_to_int(
	    (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);

	if (atio->u.isp24.fcp_cmnd.rddata &&
	    atio->u.isp24.fcp_cmnd.wrdata) {
		bidi = 1;
		data_dir = DMA_TO_DEVICE;
	} else if (atio->u.isp24.fcp_cmnd.rddata)
		data_dir = DMA_FROM_DEVICE;
	else if (atio->u.isp24.fcp_cmnd.wrdata)
		data_dir = DMA_TO_DEVICE;
	else
		data_dir = DMA_NONE;

	fcp_task_attr = qlt_get_fcp_task_attr(vha,
	    atio->u.isp24.fcp_cmnd.task_attr);
	data_length = be32_to_cpu(get_unaligned((uint32_t *)
	    &atio->u.isp24.fcp_cmnd.add_cdb[
	    atio->u.isp24.fcp_cmnd.add_cdb_len]));

3290 3291
	ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
				          fcp_task_attr, data_dir, bidi);
3292 3293 3294 3295 3296
	if (ret != 0)
		goto out_term;
	/*
	 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
	 */
3297
	spin_lock_irqsave(&ha->hardware_lock, flags);
3298
	ha->tgt.tgt_ops->put_sess(sess);
3299
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
3300 3301 3302
	return;

out_term:
3303
	ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3304
	/*
3305 3306
	 * cmd has not sent to target yet, so pass NULL as the second
	 * argument to qlt_send_term_exchange() and free the memory here.
3307
	 */
3308
	cmd->cmd_flags |= BIT_2;
3309 3310
	spin_lock_irqsave(&ha->hardware_lock, flags);
	qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3311 3312

	qlt_decr_num_pend_cmds(vha);
3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342
	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
	ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static void qlt_do_work(struct work_struct *work)
{
	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);

	__qlt_do_work(cmd);
}

static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
				       struct qla_tgt_sess *sess,
				       struct atio_from_isp *atio)
{
	struct se_session *se_sess = sess->se_sess;
	struct qla_tgt_cmd *cmd;
	int tag;

	tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
	if (tag < 0)
		return NULL;

	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
	memset(cmd, 0, sizeof(struct qla_tgt_cmd));

	memcpy(&cmd->atio, atio, sizeof(*atio));
	cmd->state = QLA_TGT_STATE_NEW;
	cmd->tgt = vha->vha_tgt.qla_tgt;
3343
	qlt_incr_num_pend_cmds(vha);
3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393
	cmd->vha = vha;
	cmd->se_cmd.map_tag = tag;
	cmd->sess = sess;
	cmd->loop_id = sess->loop_id;
	cmd->conf_compl_supported = sess->conf_compl_supported;

	return cmd;
}

static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
			  uint16_t);

static void qlt_create_sess_from_atio(struct work_struct *work)
{
	struct qla_tgt_sess_op *op = container_of(work,
					struct qla_tgt_sess_op, work);
	scsi_qla_host_t *vha = op->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess;
	struct qla_tgt_cmd *cmd;
	unsigned long flags;
	uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
		"qla_target(%d): Unable to find wwn login"
		" (s_id %x:%x:%x), trying to create it manually\n",
		vha->vp_idx, s_id[0], s_id[1], s_id[2]);

	if (op->atio.u.raw.entry_count > 1) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
		        "Dropping multy entry atio %p\n", &op->atio);
		goto out_term;
	}

	mutex_lock(&vha->vha_tgt.tgt_mutex);
	sess = qlt_make_local_sess(vha, s_id);
	/* sess has an extra creation ref. */
	mutex_unlock(&vha->vha_tgt.tgt_mutex);

	if (!sess)
		goto out_term;
	/*
	 * Now obtain a pre-allocated session tag using the original op->atio
	 * packet header, and dispatch into __qlt_do_work() using the existing
	 * process context.
	 */
	cmd = qlt_get_tag(vha, sess, &op->atio);
	if (!cmd) {
		spin_lock_irqsave(&ha->hardware_lock, flags);
		qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3394
		ha->tgt.tgt_ops->put_sess(sess);
3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		kfree(op);
		return;
	}
	/*
	 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
	 * the extra reference taken above by qlt_make_local_sess()
	 */
	__qlt_do_work(cmd);
	kfree(op);
	return;

out_term:
	spin_lock_irqsave(&ha->hardware_lock, flags);
	qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3410
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
3411 3412
	kfree(op);

3413 3414 3415 3416 3417 3418
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
	struct atio_from_isp *atio)
{
3419
	struct qla_hw_data *ha = vha->hw;
3420
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3421
	struct qla_tgt_sess *sess;
3422 3423 3424
	struct qla_tgt_cmd *cmd;

	if (unlikely(tgt->tgt_stop)) {
3425
		ql_dbg(ql_dbg_io, vha, 0x3061,
3426 3427 3428 3429
		    "New command while device %p is shutting down\n", tgt);
		return -EFAULT;
	}

3430 3431 3432 3433 3434 3435 3436 3437
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
	if (unlikely(!sess)) {
		struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
						     GFP_ATOMIC);
		if (!op)
			return -ENOMEM;

		memcpy(&op->atio, atio, sizeof(*atio));
3438
		op->vha = vha;
3439 3440 3441 3442 3443 3444 3445 3446 3447 3448
		INIT_WORK(&op->work, qlt_create_sess_from_atio);
		queue_work(qla_tgt_wq, &op->work);
		return 0;
	}
	/*
	 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
	 */
	kref_get(&sess->se_sess->sess_kref);

	cmd = qlt_get_tag(vha, sess, atio);
3449
	if (!cmd) {
3450
		ql_dbg(ql_dbg_io, vha, 0x3062,
3451
		    "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3452
		ha->tgt.tgt_ops->put_sess(sess);
3453 3454 3455
		return -ENOMEM;
	}

3456 3457 3458
	cmd->cmd_flags = 0;
	cmd->jiffies_at_alloc = get_jiffies_64();

3459 3460
	cmd->reset_count = vha->hw->chip_reset;

3461 3462
	cmd->cmd_in_wq = 1;
	cmd->cmd_flags |= BIT_0;
3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495
	INIT_WORK(&cmd->work, qlt_do_work);
	queue_work(qla_tgt_wq, &cmd->work);
	return 0;

}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
	int fn, void *iocb, int flags)
{
	struct scsi_qla_host *vha = sess->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_mgmt_cmd *mcmd;
	int res;
	uint8_t tmr_func;

	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
	if (!mcmd) {
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
		    "qla_target(%d): Allocation of management "
		    "command failed, some commands and their data could "
		    "leak\n", vha->vp_idx);
		return -ENOMEM;
	}
	memset(mcmd, 0, sizeof(*mcmd));
	mcmd->sess = sess;

	if (iocb) {
		memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
		    sizeof(mcmd->orig_iocb.imm_ntfy));
	}
	mcmd->tmr_func = fn;
	mcmd->flags = flags;
3496
	mcmd->reset_count = vha->hw->chip_reset;
3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586

	switch (fn) {
	case QLA_TGT_CLEAR_ACA:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
		    "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
		tmr_func = TMR_CLEAR_ACA;
		break;

	case QLA_TGT_TARGET_RESET:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
		    "qla_target(%d): TARGET_RESET received\n",
		    sess->vha->vp_idx);
		tmr_func = TMR_TARGET_WARM_RESET;
		break;

	case QLA_TGT_LUN_RESET:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
		    "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
		tmr_func = TMR_LUN_RESET;
		break;

	case QLA_TGT_CLEAR_TS:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
		    "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
		tmr_func = TMR_CLEAR_TASK_SET;
		break;

	case QLA_TGT_ABORT_TS:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
		    "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
		tmr_func = TMR_ABORT_TASK_SET;
		break;
#if 0
	case QLA_TGT_ABORT_ALL:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
		    "qla_target(%d): Doing ABORT_ALL_TASKS\n",
		    sess->vha->vp_idx);
		tmr_func = 0;
		break;

	case QLA_TGT_ABORT_ALL_SESS:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
		    "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
		    sess->vha->vp_idx);
		tmr_func = 0;
		break;

	case QLA_TGT_NEXUS_LOSS_SESS:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
		    "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
		    sess->vha->vp_idx);
		tmr_func = 0;
		break;

	case QLA_TGT_NEXUS_LOSS:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
		    "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
		tmr_func = 0;
		break;
#endif
	default:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
		    "qla_target(%d): Unknown task mgmt fn 0x%x\n",
		    sess->vha->vp_idx, fn);
		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
		return -ENOSYS;
	}

	res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
	if (res != 0) {
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
		    "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
		    sess->vha->vp_idx, res);
		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
		return -EFAULT;
	}

	return 0;
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
{
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt *tgt;
	struct qla_tgt_sess *sess;
	uint32_t lun, unpacked_lun;
	int lun_size, fn;

3587
	tgt = vha->vha_tgt.qla_tgt;
3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631

	lun = a->u.isp24.fcp_cmnd.lun;
	lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    a->u.isp24.fcp_hdr.s_id);
	unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);

	if (!sess) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
		    "qla_target(%d): task mgmt fn 0x%x for "
		    "non-existant session\n", vha->vp_idx, fn);
		return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
		    sizeof(struct atio_from_isp));
	}

	return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
}

/* ha->hardware_lock supposed to be held on entry */
static int __qlt_abort_task(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
{
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_mgmt_cmd *mcmd;
	uint32_t lun, unpacked_lun;
	int rc;

	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
	if (mcmd == NULL) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
		    "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
		    vha->vp_idx, __func__);
		return -ENOMEM;
	}
	memset(mcmd, 0, sizeof(*mcmd));

	mcmd->sess = sess;
	memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
	    sizeof(mcmd->orig_iocb.imm_ntfy));

	lun = a->u.isp24.fcp_cmnd.lun;
	unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3632
	mcmd->reset_count = vha->hw->chip_reset;
3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661

	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
	    le16_to_cpu(iocb->u.isp2x.seq_id));
	if (rc != 0) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
		    "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
		    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 */
static int qlt_abort_task(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb)
{
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess;
	int loop_id;

	loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);

	sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
	if (sess == NULL) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
		    "qla_target(%d): task abort for unexisting "
		    "session\n", vha->vp_idx);
3662
		return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677
		    QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
	}

	return __qlt_abort_task(vha, iocb, sess);
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb)
{
	int res = 0;

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3678 3679
	    "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
	    vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691

	switch (iocb->u.isp24.status_subcode) {
	case ELS_PLOGI:
	case ELS_FLOGI:
	case ELS_PRLI:
	case ELS_LOGO:
	case ELS_PRLO:
		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
		break;
	case ELS_PDISC:
	case ELS_ADISC:
	{
3692
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923
		if (tgt->link_reinit_iocb_pending) {
			qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
			    0, 0, 0, 0, 0, 0);
			tgt->link_reinit_iocb_pending = 0;
		}
		res = 1; /* send notify ack */
		break;
	}

	default:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
		    "qla_target(%d): Unsupported ELS command %x "
		    "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
		break;
	}

	return res;
}

static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
{
	struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
	size_t first_offset = 0, rem_offset = offset, tmp = 0;
	int i, sg_srr_cnt, bufflen = 0;

	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
	    "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
	    "cmd->sg_cnt: %u, direction: %d\n",
	    cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);

	/*
	 * FIXME: Reject non zero SRR relative offset until we can test
	 * this code properly.
	 */
	pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
	return -1;

	if (!cmd->sg || !cmd->sg_cnt) {
		ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
		    "Missing cmd->sg or zero cmd->sg_cnt in"
		    " qla_tgt_set_data_offset\n");
		return -EINVAL;
	}
	/*
	 * Walk the current cmd->sg list until we locate the new sg_srr_start
	 */
	for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
		ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
		    "sg[%d]: %p page: %p, length: %d, offset: %d\n",
		    i, sg, sg_page(sg), sg->length, sg->offset);

		if ((sg->length + tmp) > offset) {
			first_offset = rem_offset;
			sg_srr_start = sg;
			ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
			    "Found matching sg[%d], using %p as sg_srr_start, "
			    "and using first_offset: %zu\n", i, sg,
			    first_offset);
			break;
		}
		tmp += sg->length;
		rem_offset -= sg->length;
	}

	if (!sg_srr_start) {
		ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
		    "Unable to locate sg_srr_start for offset: %u\n", offset);
		return -EINVAL;
	}
	sg_srr_cnt = (cmd->sg_cnt - i);

	sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
	if (!sg_srr) {
		ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
		    "Unable to allocate sgp\n");
		return -ENOMEM;
	}
	sg_init_table(sg_srr, sg_srr_cnt);
	sgp = &sg_srr[0];
	/*
	 * Walk the remaining list for sg_srr_start, mapping to the newly
	 * allocated sg_srr taking first_offset into account.
	 */
	for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
		if (first_offset) {
			sg_set_page(sgp, sg_page(sg),
			    (sg->length - first_offset), first_offset);
			first_offset = 0;
		} else {
			sg_set_page(sgp, sg_page(sg), sg->length, 0);
		}
		bufflen += sgp->length;

		sgp = sg_next(sgp);
		if (!sgp)
			break;
	}

	cmd->sg = sg_srr;
	cmd->sg_cnt = sg_srr_cnt;
	cmd->bufflen = bufflen;
	cmd->offset += offset;
	cmd->free_sg = 1;

	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
	    cmd->sg_cnt);
	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
	    cmd->bufflen);
	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
	    cmd->offset);

	if (cmd->sg_cnt < 0)
		BUG();

	if (cmd->bufflen < 0)
		BUG();

	return 0;
}

static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
	uint32_t srr_rel_offs, int *xmit_type)
{
	int res = 0, rel_offs;

	rel_offs = srr_rel_offs - cmd->offset;
	ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
	    srr_rel_offs, rel_offs);

	*xmit_type = QLA_TGT_XMIT_ALL;

	if (rel_offs < 0) {
		ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
		    "qla_target(%d): SRR rel_offs (%d) < 0",
		    cmd->vha->vp_idx, rel_offs);
		res = -1;
	} else if (rel_offs == cmd->bufflen)
		*xmit_type = QLA_TGT_XMIT_STATUS;
	else if (rel_offs > 0)
		res = qlt_set_data_offset(cmd, rel_offs);

	return res;
}

/* No locks, thread context */
static void qlt_handle_srr(struct scsi_qla_host *vha,
	struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
{
	struct imm_ntfy_from_isp *ntfy =
	    (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_cmd *cmd = sctio->cmd;
	struct se_cmd *se_cmd = &cmd->se_cmd;
	unsigned long flags;
	int xmit_type = 0, resp = 0;
	uint32_t offset;
	uint16_t srr_ui;

	offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
	srr_ui = ntfy->u.isp24.srr_ui;

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
	    cmd, srr_ui);

	switch (srr_ui) {
	case SRR_IU_STATUS:
		spin_lock_irqsave(&ha->hardware_lock, flags);
		qlt_send_notify_ack(vha, ntfy,
		    0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		xmit_type = QLA_TGT_XMIT_STATUS;
		resp = 1;
		break;
	case SRR_IU_DATA_IN:
		if (!cmd->sg || !cmd->sg_cnt) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
			    "Unable to process SRR_IU_DATA_IN due to"
			    " missing cmd->sg, state: %d\n", cmd->state);
			dump_stack();
			goto out_reject;
		}
		if (se_cmd->scsi_status != 0) {
			ql_dbg(ql_dbg_tgt, vha, 0xe02a,
			    "Rejecting SRR_IU_DATA_IN with non GOOD "
			    "scsi_status\n");
			goto out_reject;
		}
		cmd->bufflen = se_cmd->data_length;

		if (qlt_has_data(cmd)) {
			if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
				goto out_reject;
			spin_lock_irqsave(&ha->hardware_lock, flags);
			qlt_send_notify_ack(vha, ntfy,
			    0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			resp = 1;
		} else {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
			    "qla_target(%d): SRR for in data for cmd "
			    "without them (tag %d, SCSI status %d), "
			    "reject", vha->vp_idx, cmd->tag,
			    cmd->se_cmd.scsi_status);
			goto out_reject;
		}
		break;
	case SRR_IU_DATA_OUT:
		if (!cmd->sg || !cmd->sg_cnt) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
			    "Unable to process SRR_IU_DATA_OUT due to"
			    " missing cmd->sg\n");
			dump_stack();
			goto out_reject;
		}
		if (se_cmd->scsi_status != 0) {
			ql_dbg(ql_dbg_tgt, vha, 0xe02b,
			    "Rejecting SRR_IU_DATA_OUT"
			    " with non GOOD scsi_status\n");
			goto out_reject;
		}
		cmd->bufflen = se_cmd->data_length;

		if (qlt_has_data(cmd)) {
			if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
				goto out_reject;
			spin_lock_irqsave(&ha->hardware_lock, flags);
			qlt_send_notify_ack(vha, ntfy,
			    0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
3924 3925
			if (xmit_type & QLA_TGT_XMIT_DATA) {
				cmd->cmd_flags |= BIT_8;
3926
				qlt_rdy_to_xfer(cmd);
3927
			}
3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944
		} else {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
			    "qla_target(%d): SRR for out data for cmd "
			    "without them (tag %d, SCSI status %d), "
			    "reject", vha->vp_idx, cmd->tag,
			    cmd->se_cmd.scsi_status);
			goto out_reject;
		}
		break;
	default:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
		    "qla_target(%d): Unknown srr_ui value %x",
		    vha->vp_idx, srr_ui);
		goto out_reject;
	}

	/* Transmit response in case of status and data-in cases */
3945 3946
	if (resp) {
		cmd->cmd_flags |= BIT_7;
3947
		qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3948
	}
3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960

	return;

out_reject:
	spin_lock_irqsave(&ha->hardware_lock, flags);
	qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
	    NOTIFY_ACK_SRR_FLAGS_REJECT,
	    NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
	    NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
	if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
		cmd->state = QLA_TGT_STATE_DATA_IN;
		dump_stack();
3961 3962
	} else {
		cmd->cmd_flags |= BIT_9;
3963
		qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3964
	}
3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
	struct qla_tgt_srr_imm *imm, int ha_locked)
{
	struct qla_hw_data *ha = vha->hw;
	unsigned long flags = 0;

	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);

	qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
	    NOTIFY_ACK_SRR_FLAGS_REJECT,
	    NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
	    NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);

	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

	kfree(imm);
}

static void qlt_handle_srr_work(struct work_struct *work)
{
	struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_tgt_srr_ctio *sctio;
	unsigned long flags;

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
	    tgt);

restart:
	spin_lock_irqsave(&tgt->srr_lock, flags);
	list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
		struct qla_tgt_srr_imm *imm, *i, *ti;
		struct qla_tgt_cmd *cmd;
		struct se_cmd *se_cmd;

		imm = NULL;
		list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
						srr_list_entry) {
			if (i->srr_id == sctio->srr_id) {
				list_del(&i->srr_list_entry);
				if (imm) {
					ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
					  "qla_target(%d): There must be "
					  "only one IMM SRR per CTIO SRR "
					  "(IMM SRR %p, id %d, CTIO %p\n",
					  vha->vp_idx, i, i->srr_id, sctio);
					qlt_reject_free_srr_imm(tgt->vha, i, 0);
				} else
					imm = i;
			}
		}

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
		    "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
		    sctio->srr_id);

		if (imm == NULL) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
			    "Not found matching IMM for SRR CTIO (id %d)\n",
			    sctio->srr_id);
			continue;
		} else
			list_del(&sctio->srr_list_entry);

		spin_unlock_irqrestore(&tgt->srr_lock, flags);

		cmd = sctio->cmd;
		/*
		 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
		 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
		 * logic..
		 */
		cmd->offset = 0;
		if (cmd->free_sg) {
			kfree(cmd->sg);
			cmd->sg = NULL;
			cmd->free_sg = 0;
		}
		se_cmd = &cmd->se_cmd;

		cmd->sg_cnt = se_cmd->t_data_nents;
		cmd->sg = se_cmd->t_data_sg;

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
		    "SRR cmd %p (se_cmd %p, tag %d, op %x), "
		    "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
4056 4057
		    se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
		    cmd->sg_cnt, cmd->offset);
4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072

		qlt_handle_srr(vha, sctio, imm);

		kfree(imm);
		kfree(sctio);
		goto restart;
	}
	spin_unlock_irqrestore(&tgt->srr_lock, flags);
}

/* ha->hardware_lock supposed to be held on entry */
static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb)
{
	struct qla_tgt_srr_imm *imm;
4073
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4074 4075 4076 4077
	struct qla_tgt_srr_ctio *sctio;

	tgt->imm_srr_id++;

4078
	ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182
	    vha->vp_idx);

	imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
	if (imm != NULL) {
		memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));

		/* IRQ is already OFF */
		spin_lock(&tgt->srr_lock);
		imm->srr_id = tgt->imm_srr_id;
		list_add_tail(&imm->srr_list_entry,
		    &tgt->srr_imm_list);
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
		    "IMM NTFY SRR %p added (id %d, ui %x)\n",
		    imm, imm->srr_id, iocb->u.isp24.srr_ui);
		if (tgt->imm_srr_id == tgt->ctio_srr_id) {
			int found = 0;
			list_for_each_entry(sctio, &tgt->srr_ctio_list,
			    srr_list_entry) {
				if (sctio->srr_id == imm->srr_id) {
					found = 1;
					break;
				}
			}
			if (found) {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
				    "Scheduling srr work\n");
				schedule_work(&tgt->srr_work);
			} else {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
				    "qla_target(%d): imm_srr_id "
				    "== ctio_srr_id (%d), but there is no "
				    "corresponding SRR CTIO, deleting IMM "
				    "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
				    imm);
				list_del(&imm->srr_list_entry);

				kfree(imm);

				spin_unlock(&tgt->srr_lock);
				goto out_reject;
			}
		}
		spin_unlock(&tgt->srr_lock);
	} else {
		struct qla_tgt_srr_ctio *ts;

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
		    "qla_target(%d): Unable to allocate SRR IMM "
		    "entry, SRR request will be rejected\n", vha->vp_idx);

		/* IRQ is already OFF */
		spin_lock(&tgt->srr_lock);
		list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
		    srr_list_entry) {
			if (sctio->srr_id == tgt->imm_srr_id) {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
				    "CTIO SRR %p deleted (id %d)\n",
				    sctio, sctio->srr_id);
				list_del(&sctio->srr_list_entry);
				qlt_send_term_exchange(vha, sctio->cmd,
				    &sctio->cmd->atio, 1);
				kfree(sctio);
			}
		}
		spin_unlock(&tgt->srr_lock);
		goto out_reject;
	}

	return;

out_reject:
	qlt_send_notify_ack(vha, iocb, 0, 0, 0,
	    NOTIFY_ACK_SRR_FLAGS_REJECT,
	    NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
	    NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb)
{
	struct qla_hw_data *ha = vha->hw;
	uint32_t add_flags = 0;
	int send_notify_ack = 1;
	uint16_t status;

	status = le16_to_cpu(iocb->u.isp2x.status);
	switch (status) {
	case IMM_NTFY_LIP_RESET:
	{
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
		    "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
		    vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
		    iocb->u.isp24.status_subcode);

		if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
			send_notify_ack = 0;
		break;
	}

	case IMM_NTFY_LIP_LINK_REINIT:
	{
4183
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
		    "qla_target(%d): LINK REINIT (loop %#x, "
		    "subcode %x)\n", vha->vp_idx,
		    le16_to_cpu(iocb->u.isp24.nport_handle),
		    iocb->u.isp24.status_subcode);
		if (tgt->link_reinit_iocb_pending) {
			qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
			    0, 0, 0, 0, 0, 0);
		}
		memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
		tgt->link_reinit_iocb_pending = 1;
		/*
		 * QLogic requires to wait after LINK REINIT for possible
		 * PDISC or ADISC ELS commands
		 */
		send_notify_ack = 0;
		break;
	}

	case IMM_NTFY_PORT_LOGOUT:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
		    "qla_target(%d): Port logout (loop "
		    "%#x, subcode %x)\n", vha->vp_idx,
		    le16_to_cpu(iocb->u.isp24.nport_handle),
		    iocb->u.isp24.status_subcode);

		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
			send_notify_ack = 0;
		/* The sessions will be cleared in the callback, if needed */
		break;

	case IMM_NTFY_GLBL_TPRLO:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
		    "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
			send_notify_ack = 0;
		/* The sessions will be cleared in the callback, if needed */
		break;

	case IMM_NTFY_PORT_CONFIG:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
		    "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
		    status);
		if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
			send_notify_ack = 0;
		/* The sessions will be cleared in the callback, if needed */
		break;

	case IMM_NTFY_GLBL_LOGO:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
		    "qla_target(%d): Link failure detected\n",
		    vha->vp_idx);
		/* I_T nexus loss */
		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
			send_notify_ack = 0;
		break;

	case IMM_NTFY_IOCB_OVERFLOW:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
		    "qla_target(%d): Cannot provide requested "
		    "capability (IOCB overflowed the immediate notify "
		    "resource count)\n", vha->vp_idx);
		break;

	case IMM_NTFY_ABORT_TASK:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
		    "qla_target(%d): Abort Task (S %08x I %#x -> "
		    "L %#x)\n", vha->vp_idx,
		    le16_to_cpu(iocb->u.isp2x.seq_id),
		    GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
		    le16_to_cpu(iocb->u.isp2x.lun));
		if (qlt_abort_task(vha, iocb) == 0)
			send_notify_ack = 0;
		break;

	case IMM_NTFY_RESOURCE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
		    "qla_target(%d): Out of resources, host %ld\n",
		    vha->vp_idx, vha->host_no);
		break;

	case IMM_NTFY_MSG_RX:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
		    "qla_target(%d): Immediate notify task %x\n",
		    vha->vp_idx, iocb->u.isp2x.task_flags);
		if (qlt_handle_task_mgmt(vha, iocb) == 0)
			send_notify_ack = 0;
		break;

	case IMM_NTFY_ELS:
		if (qlt_24xx_handle_els(vha, iocb) == 0)
			send_notify_ack = 0;
		break;

	case IMM_NTFY_SRR:
		qlt_prepare_srr_imm(vha, iocb);
		send_notify_ack = 0;
		break;

	default:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
		    "qla_target(%d): Received unknown immediate "
		    "notify status %x\n", vha->vp_idx, status);
		break;
	}

	if (send_notify_ack)
		qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 * This function sends busy to ISP 2xxx or 24xx.
 */
4298
static int __qlt_send_busy(struct scsi_qla_host *vha,
4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309
	struct atio_from_isp *atio, uint16_t status)
{
	struct ctio7_to_24xx *ctio24;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	struct qla_tgt_sess *sess = NULL;

	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    atio->u.isp24.fcp_hdr.s_id);
	if (!sess) {
		qlt_send_term_exchange(vha, NULL, atio, 1);
4310
		return 0;
4311 4312 4313 4314 4315
	}
	/* Sending marker isn't necessary, since we called from ISR */

	pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
	if (!pkt) {
4316
		ql_dbg(ql_dbg_io, vha, 0x3063,
4317 4318
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet", vha->vp_idx, __func__);
4319
		return -ENOMEM;
4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343
	}

	pkt->entry_count = 1;
	pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;

	ctio24 = (struct ctio7_to_24xx *)pkt;
	ctio24->entry_type = CTIO_TYPE7;
	ctio24->nport_handle = sess->loop_id;
	ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
	ctio24->vp_index = vha->vp_idx;
	ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
	ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
	    __constant_cpu_to_le16(
		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
		CTIO7_FLAGS_DONT_RET_CTIO);
	/*
	 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
	 * if the explicit conformation is used.
	 */
	ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
	ctio24->u.status1.scsi_status = cpu_to_le16(status);
4344 4345
	/* Memory Barrier */
	wmb();
4346
	qla2x00_start_iocbs(vha, vha->req);
4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529
	return 0;
}

/*
 * This routine is used to allocate a command for either a QFull condition
 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
 * out previously.
 */
static void
qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
	struct atio_from_isp *atio, uint16_t status, int qfull)
{
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess;
	struct se_session *se_sess;
	struct qla_tgt_cmd *cmd;
	int tag;

	if (unlikely(tgt->tgt_stop)) {
		ql_dbg(ql_dbg_io, vha, 0x300a,
			"New command while device %p is shutting down\n", tgt);
		return;
	}

	if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
		vha->hw->tgt.num_qfull_cmds_dropped++;
		if (vha->hw->tgt.num_qfull_cmds_dropped >
			vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
			vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
				vha->hw->tgt.num_qfull_cmds_dropped;

		ql_dbg(ql_dbg_io, vha, 0x3068,
			"qla_target(%d): %s: QFull CMD dropped[%d]\n",
			vha->vp_idx, __func__,
			vha->hw->tgt.num_qfull_cmds_dropped);

		qlt_chk_exch_leak_thresh_hold(vha);
		return;
	}

	sess = ha->tgt.tgt_ops->find_sess_by_s_id
		(vha, atio->u.isp24.fcp_hdr.s_id);
	if (!sess)
		return;

	se_sess = sess->se_sess;

	tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
	if (tag < 0)
		return;

	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
	if (!cmd) {
		ql_dbg(ql_dbg_io, vha, 0x3009,
			"qla_target(%d): %s: Allocation of cmd failed\n",
			vha->vp_idx, __func__);

		vha->hw->tgt.num_qfull_cmds_dropped++;
		if (vha->hw->tgt.num_qfull_cmds_dropped >
			vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
			vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
				vha->hw->tgt.num_qfull_cmds_dropped;

		qlt_chk_exch_leak_thresh_hold(vha);
		return;
	}

	memset(cmd, 0, sizeof(struct qla_tgt_cmd));

	qlt_incr_num_pend_cmds(vha);
	INIT_LIST_HEAD(&cmd->cmd_list);
	memcpy(&cmd->atio, atio, sizeof(*atio));

	cmd->tgt = vha->vha_tgt.qla_tgt;
	cmd->vha = vha;
	cmd->reset_count = vha->hw->chip_reset;
	cmd->q_full = 1;

	if (qfull) {
		cmd->q_full = 1;
		/* NOTE: borrowing the state field to carry the status */
		cmd->state = status;
	} else
		cmd->term_exchg = 1;

	list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);

	vha->hw->tgt.num_qfull_cmds_alloc++;
	if (vha->hw->tgt.num_qfull_cmds_alloc >
		vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
		vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
			vha->hw->tgt.num_qfull_cmds_alloc;
}

int
qlt_free_qfull_cmds(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
	unsigned long flags;
	struct qla_tgt_cmd *cmd, *tcmd;
	struct list_head free_list;
	int rc = 0;

	if (list_empty(&ha->tgt.q_full_list))
		return 0;

	INIT_LIST_HEAD(&free_list);

	spin_lock_irqsave(&vha->hw->hardware_lock, flags);

	if (list_empty(&ha->tgt.q_full_list)) {
		spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
		return 0;
	}

	list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
		if (cmd->q_full)
			/* cmd->state is a borrowed field to hold status */
			rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
		else if (cmd->term_exchg)
			rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);

		if (rc == -ENOMEM)
			break;

		if (cmd->q_full)
			ql_dbg(ql_dbg_io, vha, 0x3006,
			    "%s: busy sent for ox_id[%04x]\n", __func__,
			    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
		else if (cmd->term_exchg)
			ql_dbg(ql_dbg_io, vha, 0x3007,
			    "%s: Term exchg sent for ox_id[%04x]\n", __func__,
			    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
		else
			ql_dbg(ql_dbg_io, vha, 0x3008,
			    "%s: Unexpected cmd in QFull list %p\n", __func__,
			    cmd);

		list_del(&cmd->cmd_list);
		list_add_tail(&cmd->cmd_list, &free_list);

		/* piggy back on hardware_lock for protection */
		vha->hw->tgt.num_qfull_cmds_alloc--;
	}
	spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);

	cmd = NULL;

	list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
		list_del(&cmd->cmd_list);
		/* This cmd was never sent to TCM.  There is no need
		 * to schedule free or call free_cmd
		 */
		qlt_free_cmd(cmd);
	}
	return rc;
}

static void
qlt_send_busy(struct scsi_qla_host *vha,
	struct atio_from_isp *atio, uint16_t status)
{
	int rc = 0;

	rc = __qlt_send_busy(vha, atio, status);
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, atio, status, 1);
}

static int
qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
	struct atio_from_isp *atio)
{
	struct qla_hw_data *ha = vha->hw;
	uint16_t status;

	if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
		return 0;

	status = temp_sam_status;
	qlt_send_busy(vha, atio, status);
	return 1;
4530 4531 4532 4533 4534 4535 4536 4537
}

/* ha->hardware_lock supposed to be held on entry */
/* called via callback from qla2xxx */
static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
	struct atio_from_isp *atio)
{
	struct qla_hw_data *ha = vha->hw;
4538
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4539 4540 4541
	int rc;

	if (unlikely(tgt == NULL)) {
4542
		ql_dbg(ql_dbg_io, vha, 0x3064,
4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556
		    "ATIO pkt, but no tgt (ha %p)", ha);
		return;
	}
	/*
	 * In tgt_stop mode we also should allow all requests to pass.
	 * Otherwise, some commands can stuck.
	 */

	tgt->irq_cmd_count++;

	switch (atio->u.raw.entry_type) {
	case ATIO_TYPE7:
		if (unlikely(atio->u.isp24.exchange_addr ==
		    ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4557
			ql_dbg(ql_dbg_io, vha, 0x3065,
4558 4559 4560 4561 4562 4563
			    "qla_target(%d): ATIO_TYPE7 "
			    "received with UNKNOWN exchange address, "
			    "sending QUEUE_FULL\n", vha->vp_idx);
			qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
			break;
		}
4564 4565 4566 4567 4568 4569 4570 4571 4572



		if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
			rc = qlt_chk_qfull_thresh_hold(vha, atio);
			if (rc != 0) {
				tgt->irq_cmd_count--;
				return;
			}
4573
			rc = qlt_handle_cmd_for_atio(vha, atio);
4574
		} else {
4575
			rc = qlt_handle_task_mgmt(vha, atio);
4576
		}
4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630
		if (unlikely(rc != 0)) {
			if (rc == -ESRCH) {
#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
				qlt_send_busy(vha, atio, SAM_STAT_BUSY);
#else
				qlt_send_term_exchange(vha, NULL, atio, 1);
#endif
			} else {
				if (tgt->tgt_stop) {
					ql_dbg(ql_dbg_tgt, vha, 0xe059,
					    "qla_target: Unable to send "
					    "command to target for req, "
					    "ignoring.\n");
				} else {
					ql_dbg(ql_dbg_tgt, vha, 0xe05a,
					    "qla_target(%d): Unable to send "
					    "command to target, sending BUSY "
					    "status.\n", vha->vp_idx);
					qlt_send_busy(vha, atio, SAM_STAT_BUSY);
				}
			}
		}
		break;

	case IMMED_NOTIFY_TYPE:
	{
		if (unlikely(atio->u.isp2x.entry_status != 0)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe05b,
			    "qla_target(%d): Received ATIO packet %x "
			    "with error status %x\n", vha->vp_idx,
			    atio->u.raw.entry_type,
			    atio->u.isp2x.entry_status);
			break;
		}
		ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
		break;
	}

	default:
		ql_dbg(ql_dbg_tgt, vha, 0xe05c,
		    "qla_target(%d): Received unknown ATIO atio "
		    "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
		break;
	}

	tgt->irq_cmd_count--;
}

/* ha->hardware_lock supposed to be held on entry */
/* called via callback from qla2xxx */
static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
{
	struct qla_hw_data *ha = vha->hw;
4631
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647

	if (unlikely(tgt == NULL)) {
		ql_dbg(ql_dbg_tgt, vha, 0xe05d,
		    "qla_target(%d): Response pkt %x received, but no "
		    "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
		return;
	}

	/*
	 * In tgt_stop mode we also should allow all requests to pass.
	 * Otherwise, some commands can stuck.
	 */

	tgt->irq_cmd_count++;

	switch (pkt->entry_type) {
4648
	case CTIO_CRC2:
4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670
	case CTIO_TYPE7:
	{
		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
		qlt_do_ctio_completion(vha, entry->handle,
		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
		    entry);
		break;
	}

	case ACCEPT_TGT_IO_TYPE:
	{
		struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
		int rc;
		if (atio->u.isp2x.status !=
		    __constant_cpu_to_le16(ATIO_CDB_VALID)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe05e,
			    "qla_target(%d): ATIO with error "
			    "status %x received\n", vha->vp_idx,
			    le16_to_cpu(atio->u.isp2x.status));
			break;
		}

4671 4672 4673 4674 4675 4676
		rc = qlt_chk_qfull_thresh_hold(vha, atio);
		if (rc != 0) {
			tgt->irq_cmd_count--;
			return;
		}

4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816
		rc = qlt_handle_cmd_for_atio(vha, atio);
		if (unlikely(rc != 0)) {
			if (rc == -ESRCH) {
#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
				qlt_send_busy(vha, atio, 0);
#else
				qlt_send_term_exchange(vha, NULL, atio, 1);
#endif
			} else {
				if (tgt->tgt_stop) {
					ql_dbg(ql_dbg_tgt, vha, 0xe05f,
					    "qla_target: Unable to send "
					    "command to target, sending TERM "
					    "EXCHANGE for rsp\n");
					qlt_send_term_exchange(vha, NULL,
					    atio, 1);
				} else {
					ql_dbg(ql_dbg_tgt, vha, 0xe060,
					    "qla_target(%d): Unable to send "
					    "command to target, sending BUSY "
					    "status\n", vha->vp_idx);
					qlt_send_busy(vha, atio, 0);
				}
			}
		}
	}
	break;

	case CONTINUE_TGT_IO_TYPE:
	{
		struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
		qlt_do_ctio_completion(vha, entry->handle,
		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
		    entry);
		break;
	}

	case CTIO_A64_TYPE:
	{
		struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
		qlt_do_ctio_completion(vha, entry->handle,
		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
		    entry);
		break;
	}

	case IMMED_NOTIFY_TYPE:
		ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
		break;

	case NOTIFY_ACK_TYPE:
		if (tgt->notify_ack_expected > 0) {
			struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
			ql_dbg(ql_dbg_tgt, vha, 0xe036,
			    "NOTIFY_ACK seq %08x status %x\n",
			    le16_to_cpu(entry->u.isp2x.seq_id),
			    le16_to_cpu(entry->u.isp2x.status));
			tgt->notify_ack_expected--;
			if (entry->u.isp2x.status !=
			    __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
				ql_dbg(ql_dbg_tgt, vha, 0xe061,
				    "qla_target(%d): NOTIFY_ACK "
				    "failed %x\n", vha->vp_idx,
				    le16_to_cpu(entry->u.isp2x.status));
			}
		} else {
			ql_dbg(ql_dbg_tgt, vha, 0xe062,
			    "qla_target(%d): Unexpected NOTIFY_ACK received\n",
			    vha->vp_idx);
		}
		break;

	case ABTS_RECV_24XX:
		ql_dbg(ql_dbg_tgt, vha, 0xe037,
		    "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
		qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
		break;

	case ABTS_RESP_24XX:
		if (tgt->abts_resp_expected > 0) {
			struct abts_resp_from_24xx_fw *entry =
				(struct abts_resp_from_24xx_fw *)pkt;
			ql_dbg(ql_dbg_tgt, vha, 0xe038,
			    "ABTS_RESP_24XX: compl_status %x\n",
			    entry->compl_status);
			tgt->abts_resp_expected--;
			if (le16_to_cpu(entry->compl_status) !=
			    ABTS_RESP_COMPL_SUCCESS) {
				if ((entry->error_subcode1 == 0x1E) &&
				    (entry->error_subcode2 == 0)) {
					/*
					 * We've got a race here: aborted
					 * exchange not terminated, i.e.
					 * response for the aborted command was
					 * sent between the abort request was
					 * received and processed.
					 * Unfortunately, the firmware has a
					 * silly requirement that all aborted
					 * exchanges must be explicitely
					 * terminated, otherwise it refuses to
					 * send responses for the abort
					 * requests. So, we have to
					 * (re)terminate the exchange and retry
					 * the abort response.
					 */
					qlt_24xx_retry_term_exchange(vha,
					    entry);
				} else
					ql_dbg(ql_dbg_tgt, vha, 0xe063,
					    "qla_target(%d): ABTS_RESP_24XX "
					    "failed %x (subcode %x:%x)",
					    vha->vp_idx, entry->compl_status,
					    entry->error_subcode1,
					    entry->error_subcode2);
			}
		} else {
			ql_dbg(ql_dbg_tgt, vha, 0xe064,
			    "qla_target(%d): Unexpected ABTS_RESP_24XX "
			    "received\n", vha->vp_idx);
		}
		break;

	default:
		ql_dbg(ql_dbg_tgt, vha, 0xe065,
		    "qla_target(%d): Received unknown response pkt "
		    "type %x\n", vha->vp_idx, pkt->entry_type);
		break;
	}

	tgt->irq_cmd_count--;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
	uint16_t *mailbox)
{
	struct qla_hw_data *ha = vha->hw;
4817
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4818
	int login_code;
4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845

	if (!ha->tgt.tgt_ops)
		return;

	if (unlikely(tgt == NULL)) {
		ql_dbg(ql_dbg_tgt, vha, 0xe03a,
		    "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
		return;
	}

	if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
	    IS_QLA2100(ha))
		return;
	/*
	 * In tgt_stop mode we also should allow all requests to pass.
	 * Otherwise, some commands can stuck.
	 */

	tgt->irq_cmd_count++;

	switch (code) {
	case MBA_RESET:			/* Reset */
	case MBA_SYSTEM_ERR:		/* System Error */
	case MBA_REQ_TRANSFER_ERR:	/* Request Transfer Error */
	case MBA_RSP_TRANSFER_ERR:	/* Response Transfer Error */
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
		    "qla_target(%d): System error async event %#x "
4846
		    "occurred", vha->vp_idx, code);
4847 4848 4849 4850 4851 4852 4853 4854
		break;
	case MBA_WAKEUP_THRES:		/* Request Queue Wake-up. */
		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		break;

	case MBA_LOOP_UP:
	{
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4855
		    "qla_target(%d): Async LOOP_UP occurred "
4856 4857 4858
		    "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871
		if (tgt->link_reinit_iocb_pending) {
			qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
			    0, 0, 0, 0, 0, 0);
			tgt->link_reinit_iocb_pending = 0;
		}
		break;
	}

	case MBA_LIP_OCCURRED:
	case MBA_LOOP_DOWN:
	case MBA_LIP_RESET:
	case MBA_RSCN_UPDATE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4872
		    "qla_target(%d): Async event %#x occurred "
4873 4874 4875
		    "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4876 4877 4878 4879 4880
		break;

	case MBA_PORT_UPDATE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
		    "qla_target(%d): Port update async event %#x "
4881
		    "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4882 4883 4884 4885 4886 4887
		    "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));

		login_code = le16_to_cpu(mailbox[2]);
		if (login_code == 0x4)
4888 4889
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
			    "Async MB 2: Got PLOGI Complete\n");
4890
		else if (login_code == 0x7)
4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
			    "Async MB 2: Port Logged Out\n");
		break;

	default:
		break;
	}

	tgt->irq_cmd_count--;
}

static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
	uint16_t loop_id)
{
	fc_port_t *fcport;
	int rc;

	fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
	if (!fcport) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
		    "qla_target(%d): Allocation of tmp FC port failed",
		    vha->vp_idx);
		return NULL;
	}

	fcport->loop_id = loop_id;

	rc = qla2x00_get_port_database(vha, fcport, 0);
	if (rc != QLA_SUCCESS) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
		    "qla_target(%d): Failed to retrieve fcport "
		    "information -- get_port_database() returned %x "
		    "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
		kfree(fcport);
		return NULL;
	}

	return fcport;
}

/* Must be called under tgt_mutex */
static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
	uint8_t *s_id)
{
	struct qla_tgt_sess *sess = NULL;
	fc_port_t *fcport = NULL;
	int rc, global_resets;
	uint16_t loop_id = 0;

retry:
4941 4942
	global_resets =
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968

	rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
	if (rc != 0) {
		if ((s_id[0] == 0xFF) &&
		    (s_id[1] == 0xFC)) {
			/*
			 * This is Domain Controller, so it should be
			 * OK to drop SCSI commands from it.
			 */
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
			    "Unable to find initiator with S_ID %x:%x:%x",
			    s_id[0], s_id[1], s_id[2]);
		} else
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
			    "qla_target(%d): Unable to find "
			    "initiator with S_ID %x:%x:%x",
			    vha->vp_idx, s_id[0], s_id[1],
			    s_id[2]);
		return NULL;
	}

	fcport = qlt_get_port_database(vha, loop_id);
	if (!fcport)
		return NULL;

	if (global_resets !=
4969
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4970 4971 4972 4973
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
		    "qla_target(%d): global reset during session discovery "
		    "(counter was %d, new %d), retrying", vha->vp_idx,
		    global_resets,
4974 4975
		    atomic_read(&vha->vha_tgt.
			qla_tgt->tgt_global_resets_count));
4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009
		goto retry;
	}

	sess = qlt_create_sess(vha, fcport, true);

	kfree(fcport);
	return sess;
}

static void qlt_abort_work(struct qla_tgt *tgt,
	struct qla_tgt_sess_work_param *prm)
{
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess = NULL;
	unsigned long flags;
	uint32_t be_s_id;
	uint8_t s_id[3];
	int rc;

	spin_lock_irqsave(&ha->hardware_lock, flags);

	if (tgt->tgt_stop)
		goto out_term;

	s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
	s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
	s_id[2] = prm->abts.fcp_hdr_le.s_id[0];

	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    (unsigned char *)&be_s_id);
	if (!sess) {
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

5010
		mutex_lock(&vha->vha_tgt.tgt_mutex);
5011 5012
		sess = qlt_make_local_sess(vha, s_id);
		/* sess has got an extra creation ref */
5013
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029

		spin_lock_irqsave(&ha->hardware_lock, flags);
		if (!sess)
			goto out_term;
	} else {
		kref_get(&sess->se_sess->sess_kref);
	}

	if (tgt->tgt_stop)
		goto out_term;

	rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
	if (rc != 0)
		goto out_term;

	ha->tgt.tgt_ops->put_sess(sess);
5030
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
5031 5032 5033 5034 5035 5036
	return;

out_term:
	qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
5037
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063
}

static void qlt_tmr_work(struct qla_tgt *tgt,
	struct qla_tgt_sess_work_param *prm)
{
	struct atio_from_isp *a = &prm->tm_iocb2;
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess = NULL;
	unsigned long flags;
	uint8_t *s_id = NULL; /* to hide compiler warnings */
	int rc;
	uint32_t lun, unpacked_lun;
	int lun_size, fn;
	void *iocb;

	spin_lock_irqsave(&ha->hardware_lock, flags);

	if (tgt->tgt_stop)
		goto out_term;

	s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
	if (!sess) {
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

5064
		mutex_lock(&vha->vha_tgt.tgt_mutex);
5065 5066
		sess = qlt_make_local_sess(vha, s_id);
		/* sess has got an extra creation ref */
5067
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086

		spin_lock_irqsave(&ha->hardware_lock, flags);
		if (!sess)
			goto out_term;
	} else {
		kref_get(&sess->se_sess->sess_kref);
	}

	iocb = a;
	lun = a->u.isp24.fcp_cmnd.lun;
	lun_size = sizeof(lun);
	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
	unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);

	rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
	if (rc != 0)
		goto out_term;

	ha->tgt.tgt_ops->put_sess(sess);
5087
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
5088 5089 5090 5091 5092 5093
	return;

out_term:
	qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
5094
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145
}

static void qlt_sess_work_fn(struct work_struct *work)
{
	struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
	struct scsi_qla_host *vha = tgt->vha;
	unsigned long flags;

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);

	spin_lock_irqsave(&tgt->sess_work_lock, flags);
	while (!list_empty(&tgt->sess_works_list)) {
		struct qla_tgt_sess_work_param *prm = list_entry(
		    tgt->sess_works_list.next, typeof(*prm),
		    sess_works_list_entry);

		/*
		 * This work can be scheduled on several CPUs at time, so we
		 * must delete the entry to eliminate double processing
		 */
		list_del(&prm->sess_works_list_entry);

		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);

		switch (prm->type) {
		case QLA_TGT_SESS_WORK_ABORT:
			qlt_abort_work(tgt, prm);
			break;
		case QLA_TGT_SESS_WORK_TM:
			qlt_tmr_work(tgt, prm);
			break;
		default:
			BUG_ON(1);
			break;
		}

		spin_lock_irqsave(&tgt->sess_work_lock, flags);

		kfree(prm);
	}
	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
}

/* Must be called under tgt_host_action_mutex */
int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
{
	struct qla_tgt *tgt;

	if (!QLA_TGT_MODE_ENABLED())
		return 0;

5146 5147 5148 5149 5150 5151
	if (!IS_TGT_MODE_CAPABLE(ha)) {
		ql_log(ql_log_warn, base_vha, 0xe070,
		    "This adapter does not support target mode.\n");
		return 0;
	}

5152
	ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5153
	    "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5154

5155
	BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182

	tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
	if (!tgt) {
		ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
		    "Unable to allocate struct qla_tgt\n");
		return -ENOMEM;
	}

	if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
		base_vha->host->hostt->supported_mode |= MODE_TARGET;

	tgt->ha = ha;
	tgt->vha = base_vha;
	init_waitqueue_head(&tgt->waitQ);
	INIT_LIST_HEAD(&tgt->sess_list);
	INIT_LIST_HEAD(&tgt->del_sess_list);
	INIT_DELAYED_WORK(&tgt->sess_del_work,
		(void (*)(struct work_struct *))qlt_del_sess_work_fn);
	spin_lock_init(&tgt->sess_work_lock);
	INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
	INIT_LIST_HEAD(&tgt->sess_works_list);
	spin_lock_init(&tgt->srr_lock);
	INIT_LIST_HEAD(&tgt->srr_ctio_list);
	INIT_LIST_HEAD(&tgt->srr_imm_list);
	INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
	atomic_set(&tgt->tgt_global_resets_count, 0);

5183
	base_vha->vha_tgt.qla_tgt = tgt;
5184 5185 5186 5187 5188 5189 5190 5191 5192 5193

	ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
		"qla_target(%d): using 64 Bit PCI addressing",
		base_vha->vp_idx);
	tgt->tgt_enable_64bit_addr = 1;
	/* 3 is reserved */
	tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
	tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
	tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;

5194 5195 5196
	if (base_vha->fc_vport)
		return 0;

5197 5198 5199 5200 5201 5202 5203 5204 5205 5206
	mutex_lock(&qla_tgt_mutex);
	list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
	mutex_unlock(&qla_tgt_mutex);

	return 0;
}

/* Must be called under tgt_host_action_mutex */
int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
{
5207
	if (!vha->vha_tgt.qla_tgt)
5208 5209
		return 0;

5210 5211 5212 5213
	if (vha->fc_vport) {
		qlt_release(vha->vha_tgt.qla_tgt);
		return 0;
	}
5214 5215 5216 5217

	/* free left over qfull cmds */
	qlt_init_term_exchange(vha);

5218
	mutex_lock(&qla_tgt_mutex);
5219
	list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5220 5221 5222 5223
	mutex_unlock(&qla_tgt_mutex);

	ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
	    vha->host_no, ha);
5224
	qlt_release(vha->vha_tgt.qla_tgt);
5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257

	return 0;
}

static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
	unsigned char *b)
{
	int i;

	pr_debug("qla2xxx HW vha->node_name: ");
	for (i = 0; i < WWN_SIZE; i++)
		pr_debug("%02x ", vha->node_name[i]);
	pr_debug("\n");
	pr_debug("qla2xxx HW vha->port_name: ");
	for (i = 0; i < WWN_SIZE; i++)
		pr_debug("%02x ", vha->port_name[i]);
	pr_debug("\n");

	pr_debug("qla2xxx passed configfs WWPN: ");
	put_unaligned_be64(wwpn, b);
	for (i = 0; i < WWN_SIZE; i++)
		pr_debug("%02x ", b[i]);
	pr_debug("\n");
}

/**
 * qla_tgt_lport_register - register lport with external module
 *
 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
 * @wwpn: Passwd FC target WWPN
 * @callback:  lport initialization callback for tcm_qla2xxx code
 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
 */
5258 5259 5260
int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
		       u64 npiv_wwpn, u64 npiv_wwnn,
		       int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282
{
	struct qla_tgt *tgt;
	struct scsi_qla_host *vha;
	struct qla_hw_data *ha;
	struct Scsi_Host *host;
	unsigned long flags;
	int rc;
	u8 b[WWN_SIZE];

	mutex_lock(&qla_tgt_mutex);
	list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
		vha = tgt->vha;
		ha = vha->hw;

		host = vha->host;
		if (!host)
			continue;

		if (!(host->hostt->supported_mode & MODE_TARGET))
			continue;

		spin_lock_irqsave(&ha->hardware_lock, flags);
5283
		if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5284 5285 5286 5287 5288
			pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
			    host->host_no);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			continue;
		}
5289 5290 5291 5292 5293 5294
		if (tgt->tgt_stop) {
			pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
				 host->host_no);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			continue;
		}
5295 5296 5297 5298 5299 5300 5301 5302
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

		if (!scsi_host_get(host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe068,
			    "Unable to scsi_host_get() for"
			    " qla2xxx scsi_host\n");
			continue;
		}
5303
		qlt_lport_dump(vha, phys_wwpn, b);
5304 5305 5306 5307 5308

		if (memcmp(vha->port_name, b, WWN_SIZE)) {
			scsi_host_put(host);
			continue;
		}
5309 5310 5311 5312
		rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
		if (rc != 0)
			scsi_host_put(host);

5313
		mutex_unlock(&qla_tgt_mutex);
5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333
		return rc;
	}
	mutex_unlock(&qla_tgt_mutex);

	return -ENODEV;
}
EXPORT_SYMBOL(qlt_lport_register);

/**
 * qla_tgt_lport_deregister - Degister lport
 *
 * @vha:  Registered scsi_qla_host pointer
 */
void qlt_lport_deregister(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
	struct Scsi_Host *sh = vha->host;
	/*
	 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
	 */
5334
	vha->vha_tgt.target_lport_ptr = NULL;
5335 5336 5337 5338 5339 5340 5341 5342 5343
	ha->tgt.tgt_ops = NULL;
	/*
	 * Release the Scsi_Host reference for the underlying qla2xxx host
	 */
	scsi_host_put(sh);
}
EXPORT_SYMBOL(qlt_lport_deregister);

/* Must be called under HW lock */
5344
static void qlt_set_mode(struct scsi_qla_host *vha)
5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364
{
	struct qla_hw_data *ha = vha->hw;

	switch (ql2x_ini_mode) {
	case QLA2XXX_INI_MODE_DISABLED:
	case QLA2XXX_INI_MODE_EXCLUSIVE:
		vha->host->active_mode = MODE_TARGET;
		break;
	case QLA2XXX_INI_MODE_ENABLED:
		vha->host->active_mode |= MODE_TARGET;
		break;
	default:
		break;
	}

	if (ha->tgt.ini_mode_force_reverse)
		qla_reverse_ini_mode(vha);
}

/* Must be called under HW lock */
5365
static void qlt_clear_mode(struct scsi_qla_host *vha)
5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380 5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392 5393 5394 5395
{
	struct qla_hw_data *ha = vha->hw;

	switch (ql2x_ini_mode) {
	case QLA2XXX_INI_MODE_DISABLED:
		vha->host->active_mode = MODE_UNKNOWN;
		break;
	case QLA2XXX_INI_MODE_EXCLUSIVE:
		vha->host->active_mode = MODE_INITIATOR;
		break;
	case QLA2XXX_INI_MODE_ENABLED:
		vha->host->active_mode &= ~MODE_TARGET;
		break;
	default:
		break;
	}

	if (ha->tgt.ini_mode_force_reverse)
		qla_reverse_ini_mode(vha);
}

/*
 * qla_tgt_enable_vha - NO LOCK HELD
 *
 * host_reset, bring up w/ Target Mode Enabled
 */
void
qlt_enable_vha(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
5396
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5397
	unsigned long flags;
5398
	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5399 5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412

	if (!tgt) {
		ql_dbg(ql_dbg_tgt, vha, 0xe069,
		    "Unable to locate qla_tgt pointer from"
		    " struct qla_hw_data\n");
		dump_stack();
		return;
	}

	spin_lock_irqsave(&ha->hardware_lock, flags);
	tgt->tgt_stopped = 0;
	qlt_set_mode(vha);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

5413 5414 5415 5416 5417 5418 5419 5420
	if (vha->vp_idx) {
		qla24xx_disable_vp(vha);
		qla24xx_enable_vp(vha);
	} else {
		set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
		qla2xxx_wake_dpc(base_vha);
		qla2x00_wait_for_hba_online(base_vha);
	}
5421 5422 5423 5424 5425 5426 5427 5428
}
EXPORT_SYMBOL(qlt_enable_vha);

/*
 * qla_tgt_disable_vha - NO LOCK HELD
 *
 * Disable Target Mode and reset the adapter
 */
5429
static void qlt_disable_vha(struct scsi_qla_host *vha)
5430 5431
{
	struct qla_hw_data *ha = vha->hw;
5432
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5433 5434 5435 5436 5437 5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457 5458 5459 5460 5461 5462
	unsigned long flags;

	if (!tgt) {
		ql_dbg(ql_dbg_tgt, vha, 0xe06a,
		    "Unable to locate qla_tgt pointer from"
		    " struct qla_hw_data\n");
		dump_stack();
		return;
	}

	spin_lock_irqsave(&ha->hardware_lock, flags);
	qlt_clear_mode(vha);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
	qla2xxx_wake_dpc(vha);
	qla2x00_wait_for_hba_online(vha);
}

/*
 * Called from qla_init.c:qla24xx_vport_create() contex to setup
 * the target mode specific struct scsi_qla_host and struct qla_hw_data
 * members.
 */
void
qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
{
	if (!qla_tgt_mode_enabled(vha))
		return;

5463 5464 5465 5466
	vha->vha_tgt.qla_tgt = NULL;

	mutex_init(&vha->vha_tgt.tgt_mutex);
	mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5467 5468 5469 5470 5471 5472 5473 5474 5475 5476

	qlt_clear_mode(vha);

	/*
	 * NOTE: Currently the value is kept the same for <24xx and
	 * >=24xx ISPs. If it is necessary to change it,
	 * the check should be added for specific ISPs,
	 * assigning the value appropriately.
	 */
	ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5477 5478

	qlt_add_target(ha, vha);
5479 5480 5481 5482 5483 5484 5485 5486 5487 5488 5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499 5500 5501 5502 5503 5504 5505 5506 5507 5508 5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557
}

void
qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
{
	/*
	 * FC-4 Feature bit 0 indicates target functionality to the name server.
	 */
	if (qla_tgt_mode_enabled(vha)) {
		if (qla_ini_mode_enabled(vha))
			ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
		else
			ct_req->req.rff_id.fc4_feature = BIT_0;
	} else if (qla_ini_mode_enabled(vha)) {
		ct_req->req.rff_id.fc4_feature = BIT_1;
	}
}

/*
 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
 * @ha: HA context
 *
 * Beginning of ATIO ring has initialization control block already built
 * by nvram config routine.
 *
 * Returns 0 on success.
 */
void
qlt_init_atio_q_entries(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
	uint16_t cnt;
	struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;

	if (!qla_tgt_mode_enabled(vha))
		return;

	for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
		pkt->u.raw.signature = ATIO_PROCESSED;
		pkt++;
	}

}

/*
 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
 * @ha: SCSI driver HA context
 */
void
qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
	struct atio_from_isp *pkt;
	int cnt, i;

	if (!vha->flags.online)
		return;

	while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
		pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
		cnt = pkt->u.raw.entry_count;

		qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);

		for (i = 0; i < cnt; i++) {
			ha->tgt.atio_ring_index++;
			if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
				ha->tgt.atio_ring_index = 0;
				ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
			} else
				ha->tgt.atio_ring_ptr++;

			pkt->u.raw.signature = ATIO_PROCESSED;
			pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
		}
		wmb();
	}

	/* Adjust ring index */
5558
	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5559 5560 5561
}

void
5562
qlt_24xx_config_rings(struct scsi_qla_host *vha)
5563 5564
{
	struct qla_hw_data *ha = vha->hw;
5565 5566
	if (!QLA_TGT_MODE_ENABLED())
		return;
5567

5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578 5579
	WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
	RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));

	if (IS_ATIO_MSIX_CAPABLE(ha)) {
		struct qla_msix_entry *msix = &ha->msix_entries[2];
		struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;

		icb->msix_atio = cpu_to_le16(msix->entry);
		ql_dbg(ql_dbg_init, vha, 0xf072,
		    "Registering ICB vector 0x%x for atio que.\n",
		    msix->entry);
5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599 5600 5601 5602 5603 5604 5605 5606 5607 5608 5609 5610 5611 5612 5613
	}
}

void
qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
{
	struct qla_hw_data *ha = vha->hw;

	if (qla_tgt_mode_enabled(vha)) {
		if (!ha->tgt.saved_set) {
			/* We save only once */
			ha->tgt.saved_exchange_count = nv->exchange_count;
			ha->tgt.saved_firmware_options_1 =
			    nv->firmware_options_1;
			ha->tgt.saved_firmware_options_2 =
			    nv->firmware_options_2;
			ha->tgt.saved_firmware_options_3 =
			    nv->firmware_options_3;
			ha->tgt.saved_set = 1;
		}

		nv->exchange_count = __constant_cpu_to_le16(0xFFFF);

		/* Enable target mode */
		nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);

		/* Disable ini mode, if requested */
		if (!qla_ini_mode_enabled(vha))
			nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);

		/* Disable Full Login after LIP */
		nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
		/* Enable initial LIP */
		nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5614 5615 5616 5617 5618 5619 5620
		if (ql2xtgt_tape_enable)
			/* Enable FC Tape support */
			nv->firmware_options_2 |= cpu_to_le32(BIT_12);
		else
			/* Disable FC Tape support */
			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);

5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653 5654 5655 5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666
		/* Disable Full Login after LIP */
		nv->host_p &= __constant_cpu_to_le32(~BIT_10);
		/* Enable target PRLI control */
		nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
	} else {
		if (ha->tgt.saved_set) {
			nv->exchange_count = ha->tgt.saved_exchange_count;
			nv->firmware_options_1 =
			    ha->tgt.saved_firmware_options_1;
			nv->firmware_options_2 =
			    ha->tgt.saved_firmware_options_2;
			nv->firmware_options_3 =
			    ha->tgt.saved_firmware_options_3;
		}
		return;
	}

	/* out-of-order frames reassembly */
	nv->firmware_options_3 |= BIT_6|BIT_9;

	if (ha->tgt.enable_class_2) {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) =
				FC_COS_CLASS2 | FC_COS_CLASS3;

		nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

		nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
	}
}

void
qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
	struct init_cb_24xx *icb)
{
	struct qla_hw_data *ha = vha->hw;

	if (ha->tgt.node_name_set) {
		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
		icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
	}
}

5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 5689 5690 5691 5692 5693 5694 5695 5696 5697 5698 5699 5700 5701
void
qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
{
	struct qla_hw_data *ha = vha->hw;

	if (!QLA_TGT_MODE_ENABLED())
		return;

	if (qla_tgt_mode_enabled(vha)) {
		if (!ha->tgt.saved_set) {
			/* We save only once */
			ha->tgt.saved_exchange_count = nv->exchange_count;
			ha->tgt.saved_firmware_options_1 =
			    nv->firmware_options_1;
			ha->tgt.saved_firmware_options_2 =
			    nv->firmware_options_2;
			ha->tgt.saved_firmware_options_3 =
			    nv->firmware_options_3;
			ha->tgt.saved_set = 1;
		}

		nv->exchange_count = __constant_cpu_to_le16(0xFFFF);

		/* Enable target mode */
		nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);

		/* Disable ini mode, if requested */
		if (!qla_ini_mode_enabled(vha))
			nv->firmware_options_1 |=
			    __constant_cpu_to_le32(BIT_5);

		/* Disable Full Login after LIP */
		nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
		/* Enable initial LIP */
		nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5702 5703 5704 5705 5706 5707 5708
		if (ql2xtgt_tape_enable)
			/* Enable FC tape support */
			nv->firmware_options_2 |= cpu_to_le32(BIT_12);
		else
			/* Disable FC tape support */
			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);

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		/* Disable Full Login after LIP */
		nv->host_p &= __constant_cpu_to_le32(~BIT_10);
		/* Enable target PRLI control */
		nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
	} else {
		if (ha->tgt.saved_set) {
			nv->exchange_count = ha->tgt.saved_exchange_count;
			nv->firmware_options_1 =
			    ha->tgt.saved_firmware_options_1;
			nv->firmware_options_2 =
			    ha->tgt.saved_firmware_options_2;
			nv->firmware_options_3 =
			    ha->tgt.saved_firmware_options_3;
		}
		return;
	}

	/* out-of-order frames reassembly */
	nv->firmware_options_3 |= BIT_6|BIT_9;

	if (ha->tgt.enable_class_2) {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) =
				FC_COS_CLASS2 | FC_COS_CLASS3;

		nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

		nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
	}
}

void
qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
	struct init_cb_81xx *icb)
{
	struct qla_hw_data *ha = vha->hw;

	if (!QLA_TGT_MODE_ENABLED())
		return;

	if (ha->tgt.node_name_set) {
		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
		icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
	}
}

void
qlt_83xx_iospace_config(struct qla_hw_data *ha)
{
	if (!QLA_TGT_MODE_ENABLED())
		return;

	ha->msix_count += 1; /* For ATIO Q */
}

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int
qlt_24xx_process_response_error(struct scsi_qla_host *vha,
	struct sts_entry_24xx *pkt)
{
	switch (pkt->entry_type) {
	case ABTS_RECV_24XX:
	case ABTS_RESP_24XX:
	case CTIO_TYPE7:
	case NOTIFY_ACK_TYPE:
5776
	case CTIO_CRC2:
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		return 1;
	default:
		return 0;
	}
}

void
qlt_modify_vp_config(struct scsi_qla_host *vha,
	struct vp_config_entry_24xx *vpmod)
{
	if (qla_tgt_mode_enabled(vha))
		vpmod->options_idx1 &= ~BIT_5;
	/* Disable ini mode, if requested */
	if (!qla_ini_mode_enabled(vha))
		vpmod->options_idx1 &= ~BIT_4;
}

void
qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
{
	if (!QLA_TGT_MODE_ENABLED())
		return;

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	if  (ha->mqenable || IS_QLA83XX(ha)) {
		ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
		ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
	} else {
		ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
		ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
	}

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	mutex_init(&base_vha->vha_tgt.tgt_mutex);
	mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
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	qlt_clear_mode(base_vha);
}

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irqreturn_t
qla83xx_msix_atio_q(int irq, void *dev_id)
{
	struct rsp_que *rsp;
	scsi_qla_host_t	*vha;
	struct qla_hw_data *ha;
	unsigned long flags;

	rsp = (struct rsp_que *) dev_id;
	ha = rsp->hw;
	vha = pci_get_drvdata(ha->pdev);

	spin_lock_irqsave(&ha->hardware_lock, flags);

	qlt_24xx_process_atio_queue(vha);
	qla24xx_process_response_queue(vha, rsp);

	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return IRQ_HANDLED;
}

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int
qlt_mem_alloc(struct qla_hw_data *ha)
{
	if (!QLA_TGT_MODE_ENABLED())
		return 0;

	ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
	    MAX_MULTI_ID_FABRIC, GFP_KERNEL);
	if (!ha->tgt.tgt_vp_map)
		return -ENOMEM;

	ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
	    (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
	    &ha->tgt.atio_dma, GFP_KERNEL);
	if (!ha->tgt.atio_ring) {
		kfree(ha->tgt.tgt_vp_map);
		return -ENOMEM;
	}
	return 0;
}

void
qlt_mem_free(struct qla_hw_data *ha)
{
	if (!QLA_TGT_MODE_ENABLED())
		return;

	if (ha->tgt.atio_ring) {
		dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
		    sizeof(struct atio_from_isp), ha->tgt.atio_ring,
		    ha->tgt.atio_dma);
	}
	kfree(ha->tgt.tgt_vp_map);
}

/* vport_slock to be held by the caller */
void
qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
{
	if (!QLA_TGT_MODE_ENABLED())
		return;

	switch (cmd) {
	case SET_VP_IDX:
		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
		break;
	case SET_AL_PA:
		vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
		break;
	case RESET_VP_IDX:
		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
		break;
	case RESET_AL_PA:
		vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
		break;
	}
}

static int __init qlt_parse_ini_mode(void)
{
	if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
		ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
		ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
		ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
	else
		return false;

	return true;
}

int __init qlt_init(void)
{
	int ret;

	if (!qlt_parse_ini_mode()) {
		ql_log(ql_log_fatal, NULL, 0xe06b,
		    "qlt_parse_ini_mode() failed\n");
		return -EINVAL;
	}

	if (!QLA_TGT_MODE_ENABLED())
		return 0;

	qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
	    sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
	    qla_tgt_mgmt_cmd), 0, NULL);
	if (!qla_tgt_mgmt_cmd_cachep) {
		ql_log(ql_log_fatal, NULL, 0xe06d,
		    "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5926
		return -ENOMEM;
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	}

	qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
	    mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
	if (!qla_tgt_mgmt_cmd_mempool) {
		ql_log(ql_log_fatal, NULL, 0xe06e,
		    "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
		ret = -ENOMEM;
		goto out_mgmt_cmd_cachep;
	}

	qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
	if (!qla_tgt_wq) {
		ql_log(ql_log_fatal, NULL, 0xe06f,
		    "alloc_workqueue for qla_tgt_wq failed\n");
		ret = -ENOMEM;
		goto out_cmd_mempool;
	}
	/*
	 * Return 1 to signal that initiator-mode is being disabled
	 */
	return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;

out_cmd_mempool:
	mempool_destroy(qla_tgt_mgmt_cmd_mempool);
out_mgmt_cmd_cachep:
	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
	return ret;
}

void qlt_exit(void)
{
	if (!QLA_TGT_MODE_ENABLED())
		return;

	destroy_workqueue(qla_tgt_wq);
	mempool_destroy(qla_tgt_mgmt_cmd_mempool);
	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
}