qla_target.c 181.9 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; "
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	"\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
	"when ready "
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	"\"enabled\" (default) - initiator mode will always stay enabled.");

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static int ql_dm_tgt_ex_pct = 50;
module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
	"For Dual Mode (qlini_mode=dual), this parameter determines "
	"the percentage of exchanges/cmds FW will allocate resources "
	"for Target mode.");

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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,
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	struct atio_from_isp *pkt, uint8_t);
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static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
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static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
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	int fn, void *iocb, int flags);
static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
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	*cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
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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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static void qlt_clear_tgt_db(struct qla_tgt *tgt);
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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);
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static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *imm, int ha_locked);
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static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
	fc_port_t *fcport, bool local);
void qlt_unreg_sess(struct fc_port *sess);
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static void qlt_24xx_handle_abts(struct scsi_qla_host *,
	struct abts_recv_from_24xx *);

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/*
 * Global Variables
 */
static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
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static struct kmem_cache *qla_tgt_plogi_cachep;
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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);

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/* This API intentionally takes dest as a parameter, rather than returning
 * int value to avoid caller forgetting to issue wmb() after the store */
void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
{
	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
	*dest = atomic_inc_return(&base_vha->generation_tick);
	/* memory barrier */
	wmb();
}

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/* 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++;
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	if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
		vha->qla_stats.stat_max_pend_cmds =
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			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_queue_unknown_atio(scsi_qla_host_t *vha,
	struct atio_from_isp *atio,	uint8_t ha_locked)
{
	struct qla_tgt_sess_op *u;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	unsigned long flags;

	if (tgt->tgt_stop) {
		ql_dbg(ql_dbg_async, vha, 0xffff,
			   "qla_target(%d): dropping unknown ATIO_TYPE7, "
			   "because tgt is being stopped", vha->vp_idx);
		goto out_term;
	}

	u = kzalloc(sizeof(*u), GFP_ATOMIC);
	if (u == NULL) {
		ql_dbg(ql_dbg_async, vha, 0xffff,
		    "Alloc of struct unknown_atio (size %zd) failed", sizeof(*u));
		/* It should be harmless and on the next retry should work well */
		goto out_term;
	}

	u->vha = vha;
	memcpy(&u->atio, atio, sizeof(*atio));
	INIT_LIST_HEAD(&u->cmd_list);

	spin_lock_irqsave(&vha->cmd_list_lock, flags);
	list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);

	schedule_delayed_work(&vha->unknown_atio_work, 1);

out:
	return;

out_term:
	qlt_send_term_exchange(vha, NULL, atio, ha_locked, 0);
	goto out;
}

static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
	uint8_t ha_locked)
{
	struct qla_tgt_sess_op *u, *t;
	scsi_qla_host_t *host;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	unsigned long flags;
	uint8_t queued = 0;

	list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
		if (u->aborted) {
			ql_dbg(ql_dbg_async, vha, 0xffff,
			    "Freeing unknown %s %p, because of Abort",
			    "ATIO_TYPE7", u);
			qlt_send_term_exchange(vha, NULL, &u->atio,
			    ha_locked, 0);
			goto abort;
		}

		host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
		if (host != NULL) {
			ql_dbg(ql_dbg_async, vha, 0xffff,
				"Requeuing unknown ATIO_TYPE7 %p", u);
			qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
		} else if (tgt->tgt_stop) {
			ql_dbg(ql_dbg_async, vha, 0xffff,
				"Freeing unknown %s %p, because tgt is being stopped",
				"ATIO_TYPE7", u);
			qlt_send_term_exchange(vha, NULL, &u->atio,
			    ha_locked, 0);
		} else {
			ql_dbg(ql_dbg_async, vha, 0xffff,
				"u %p, vha %p, host %p, sched again..", u,
				vha, host);
			if (!queued) {
				queued = 1;
				schedule_delayed_work(&vha->unknown_atio_work,
				    1);
			}
			continue;
		}

abort:
		spin_lock_irqsave(&vha->cmd_list_lock, flags);
		list_del(&u->cmd_list);
		spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
		kfree(u);
	}
}

void qlt_unknown_atio_work_fn(struct work_struct *work)
{
	struct scsi_qla_host *vha = container_of(to_delayed_work(work),
	    struct scsi_qla_host, unknown_atio_work);

	qlt_try_to_dequeue_unknown_atios(vha, 0);
}

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static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
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	struct atio_from_isp *atio, uint8_t ha_locked)
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{
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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]);
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			qlt_queue_unknown_atio(vha, atio, ha_locked);
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			break;
		}
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		if (unlikely(!list_empty(&vha->unknown_atio_list)))
			qlt_try_to_dequeue_unknown_atios(vha, ha_locked);

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		qlt_24xx_atio_pkt(host, atio, ha_locked);
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		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;
			}
		}
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		qlt_24xx_atio_pkt(host, atio, ha_locked);
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		break;
	}

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	case VP_RPT_ID_IOCB_TYPE:
		qla24xx_report_id_acquisition(vha,
			(struct vp_rpt_id_entry_24xx *)atio);
		break;

	case ABTS_RECV_24XX:
	{
		struct abts_recv_from_24xx *entry =
			(struct abts_recv_from_24xx *)atio;
		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
			entry->vp_index);
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		unsigned long flags;

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		if (unlikely(!host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xffff,
			    "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
			    "received, with unknown vp_index %d\n",
			    vha->vp_idx, entry->vp_index);
			break;
		}
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		if (!ha_locked)
			spin_lock_irqsave(&host->hw->hardware_lock, flags);
		qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
		if (!ha_locked)
			spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
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		break;
	}

	/* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */

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	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;
	}

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	return false;
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}

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;
	}

}

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/*
 * All qlt_plogi_ack_t operations are protected by hardware_lock
 */
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static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
	struct imm_ntfy_from_isp *ntfy, int type)
{
	struct qla_work_evt *e;
	e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
	if (!e)
		return QLA_FUNCTION_FAILED;

	e->u.nack.fcport = fcport;
	e->u.nack.type = type;
	memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
	return qla2x00_post_work(vha, e);
}

static
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void qla2x00_async_nack_sp_done(void *s, int res)
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{
	struct srb *sp = (struct srb *)s;
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	struct scsi_qla_host *vha = sp->vha;
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	unsigned long flags;

	ql_dbg(ql_dbg_disc, vha, 0xffff,
		"Async done-%s res %x %8phC  type %d\n",
		sp->name, res, sp->fcport->port_name, sp->type);

	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
	sp->fcport->flags &= ~FCF_ASYNC_SENT;
	sp->fcport->chip_reset = vha->hw->chip_reset;

	switch (sp->type) {
	case SRB_NACK_PLOGI:
		sp->fcport->login_gen++;
		sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
		sp->fcport->logout_on_delete = 1;
565
		sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606
		break;

	case SRB_NACK_PRLI:
		sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
		sp->fcport->deleted = 0;

		if (!sp->fcport->login_succ &&
		    !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
			sp->fcport->login_succ = 1;

			vha->fcport_count++;

			if (!IS_IIDMA_CAPABLE(vha->hw) ||
			    !vha->hw->flags.gpsc_supported) {
				ql_dbg(ql_dbg_disc, vha, 0xffff,
					"%s %d %8phC post upd_fcport fcp_cnt %d\n",
					__func__, __LINE__,
					sp->fcport->port_name,
					vha->fcport_count);

				qla24xx_post_upd_fcport_work(vha, sp->fcport);
			} else {
				ql_dbg(ql_dbg_disc, vha, 0xffff,
					"%s %d %8phC post gpsc fcp_cnt %d\n",
					__func__, __LINE__,
					sp->fcport->port_name,
					vha->fcport_count);

				qla24xx_post_gpsc_work(vha, sp->fcport);
			}
		}
		break;

	case SRB_NACK_LOGO:
		sp->fcport->login_gen++;
		sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
		qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
		break;
	}
	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);

607
	sp->free(sp);
608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656
}

int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
	struct imm_ntfy_from_isp *ntfy, int type)
{
	int rval = QLA_FUNCTION_FAILED;
	srb_t *sp;
	char *c = NULL;

	fcport->flags |= FCF_ASYNC_SENT;
	switch (type) {
	case SRB_NACK_PLOGI:
		fcport->fw_login_state = DSC_LS_PLOGI_PEND;
		c = "PLOGI";
		break;
	case SRB_NACK_PRLI:
		fcport->fw_login_state = DSC_LS_PRLI_PEND;
		c = "PRLI";
		break;
	case SRB_NACK_LOGO:
		fcport->fw_login_state = DSC_LS_LOGO_PEND;
		c = "LOGO";
		break;
	}

	sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
	if (!sp)
		goto done;

	sp->type = type;
	sp->name = "nack";

	qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);

	sp->u.iocb_cmd.u.nack.ntfy = ntfy;

	sp->done = qla2x00_async_nack_sp_done;

	rval = qla2x00_start_sp(sp);
	if (rval != QLA_SUCCESS)
		goto done_free_sp;

	ql_dbg(ql_dbg_disc, vha, 0xffff,
		"Async-%s %8phC hndl %x %s\n",
		sp->name, fcport->port_name, sp->handle, c);

	return rval;

done_free_sp:
657
	sp->free(sp);
658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772
done:
	fcport->flags &= ~FCF_ASYNC_SENT;
	return rval;
}

void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
{
	fc_port_t *t;
	unsigned long flags;

	switch (e->u.nack.type) {
	case SRB_NACK_PRLI:
		mutex_lock(&vha->vha_tgt.tgt_mutex);
		t = qlt_create_sess(vha, e->u.nack.fcport, 0);
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
		if (t) {
			ql_log(ql_log_info, vha, 0xffff,
			    "%s create sess success %p", __func__, t);
			spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
			/* create sess has an extra kref */
			vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
			spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
		}
		break;
	}
	qla24xx_async_notify_ack(vha, e->u.nack.fcport,
	    (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
}

void qla24xx_delete_sess_fn(struct work_struct *work)
{
	fc_port_t *fcport = container_of(work, struct fc_port, del_work);
	struct qla_hw_data *ha = fcport->vha->hw;
	unsigned long flags;

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);

	if (fcport->se_sess) {
		ha->tgt.tgt_ops->shutdown_sess(fcport);
		ha->tgt.tgt_ops->put_sess(fcport);
	} else {
		qlt_unreg_sess(fcport);
	}
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
}

/*
 * Called from 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;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	struct fc_port *sess = fcport;
	unsigned long flags;

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

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
	if (tgt->tgt_stop) {
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
		return;
	}

	if (fcport->disc_state == DSC_DELETE_PEND) {
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
		return;
	}

	if (!sess->se_sess) {
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

		mutex_lock(&vha->vha_tgt.tgt_mutex);
		sess = qlt_create_sess(vha, fcport, false);
		mutex_unlock(&vha->vha_tgt.tgt_mutex);

		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
	} else {
		if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
			spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
			return;
		}

		if (!kref_get_unless_zero(&sess->sess_kref)) {
			ql_dbg(ql_dbg_disc, vha, 0xffff,
			    "%s: kref_get fail sess %8phC \n",
			    __func__, sess->port_name);
			spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
			return;
		}

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

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
		    "Reappeared sess %p\n", sess);

		ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
		    fcport->loop_id,
		    (fcport->flags & FCF_CONF_COMP_SUPPORTED));
	}

	if (sess && sess->local) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
		    "qla_target(%u): local session for "
		    "port %8phC (loop ID %d) became global\n", vha->vp_idx,
		    fcport->port_name, sess->loop_id);
		sess->local = 0;
	}
	ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
}
773 774 775 776 777 778

/*
 * This is a zero-base ref-counting solution, since hardware_lock
 * guarantees that ref_count is not modified concurrently.
 * Upon successful return content of iocb is undefined
 */
779
static struct qlt_plogi_ack_t *
780 781 782
qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
		       struct imm_ntfy_from_isp *iocb)
{
783
	struct qlt_plogi_ack_t *pla;
784 785 786 787

	list_for_each_entry(pla, &vha->plogi_ack_list, list) {
		if (pla->id.b24 == id->b24) {
			qlt_send_term_imm_notif(vha, &pla->iocb, 1);
788
			memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
789 790 791 792 793 794 795 796 797 798 799 800
			return pla;
		}
	}

	pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
	if (!pla) {
		ql_dbg(ql_dbg_async, vha, 0x5088,
		       "qla_target(%d): Allocation of plogi_ack failed\n",
		       vha->vp_idx);
		return NULL;
	}

801
	memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
802 803 804 805 806 807
	pla->id = *id;
	list_add_tail(&pla->list, &vha->plogi_ack_list);

	return pla;
}

808
void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
809
    struct qlt_plogi_ack_t *pla)
810
{
811
	struct imm_ntfy_from_isp *iocb = &pla->iocb;
812 813 814 815
	port_id_t port_id;
	uint16_t loop_id;
	fc_port_t *fcport = pla->fcport;

816 817 818 819 820 821
	BUG_ON(!pla->ref_count);
	pla->ref_count--;

	if (pla->ref_count)
		return;

822
	ql_dbg(ql_dbg_disc, vha, 0x5089,
823
	    "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
824 825 826 827 828
	    " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
	    iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
	    iocb->u.isp24.port_id[0],
	    le16_to_cpu(iocb->u.isp24.nport_handle),
	    iocb->u.isp24.exchange_address, iocb->ox_id);
829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846

	port_id.b.domain = iocb->u.isp24.port_id[2];
	port_id.b.area   = iocb->u.isp24.port_id[1];
	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
	port_id.b.rsvd_1 = 0;

	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);

	fcport->loop_id = loop_id;
	fcport->d_id = port_id;
	qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);

	list_for_each_entry(fcport, &vha->vp_fcports, list) {
		if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
			fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
		if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
			fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
	}
847 848 849 850 851

	list_del(&pla->list);
	kmem_cache_free(qla_tgt_plogi_cachep, pla);
}

852
void
853 854
qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
    struct fc_port *sess, enum qlt_plogi_link_t link)
855
{
856
	struct imm_ntfy_from_isp *iocb = &pla->iocb;
857 858 859
	/* Inc ref_count first because link might already be pointing at pla */
	pla->ref_count++;

860 861 862 863 864 865 866 867
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
		"Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
		" s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
		sess, link, sess->port_name,
		iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
		iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
		pla->ref_count, pla, link);

868 869 870
	if (sess->plogi_link[link])
		qlt_plogi_ack_unref(vha, sess->plogi_link[link]);

871 872
	if (link == QLT_PLOGI_LINK_SAME_WWN)
		pla->fcport = sess;
873 874 875 876

	sess->plogi_link[link] = pla;
}

877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
typedef struct {
	/* These fields must be initialized by the caller */
	port_id_t id;
	/*
	 * number of cmds dropped while we were waiting for
	 * initiator to ack LOGO initialize to 1 if LOGO is
	 * triggered by a command, otherwise, to 0
	 */
	int cmd_count;

	/* These fields are used by callee */
	struct list_head list;
} qlt_port_logo_t;

static void
qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
{
	qlt_port_logo_t *tmp;
	int res;

	mutex_lock(&vha->vha_tgt.tgt_mutex);

	list_for_each_entry(tmp, &vha->logo_list, list) {
		if (tmp->id.b24 == logo->id.b24) {
			tmp->cmd_count += logo->cmd_count;
			mutex_unlock(&vha->vha_tgt.tgt_mutex);
			return;
		}
	}

	list_add_tail(&logo->list, &vha->logo_list);

	mutex_unlock(&vha->vha_tgt.tgt_mutex);

	res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);

	mutex_lock(&vha->vha_tgt.tgt_mutex);
	list_del(&logo->list);
	mutex_unlock(&vha->vha_tgt.tgt_mutex);

917 918 919 920
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
	    "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
	    logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
	    logo->cmd_count, res);
921 922
}

923 924
static void qlt_free_session_done(struct work_struct *work)
{
925
	struct fc_port *sess = container_of(work, struct fc_port,
926 927 928 929
	    free_work);
	struct qla_tgt *tgt = sess->tgt;
	struct scsi_qla_host *vha = sess->vha;
	struct qla_hw_data *ha = vha->hw;
930 931
	unsigned long flags;
	bool logout_started = false;
932
	struct event_arg ea;
933
	scsi_qla_host_t *base_vha;
934 935 936

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
		"%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
937
		" s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
938
		__func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
939
		sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
940
		sess->logout_on_delete, sess->keep_nport_handle,
941
		sess->send_els_logo);
942

943

944
	if (!IS_SW_RESV_ADDR(sess->d_id)) {
945 946
		if (sess->send_els_logo) {
			qlt_port_logo_t logo;
947

948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
			logo.id = sess->d_id;
			logo.cmd_count = 0;
			qlt_send_first_logo(vha, &logo);
		}

		if (sess->logout_on_delete) {
			int rc;

			rc = qla2x00_post_async_logout_work(vha, sess, NULL);
			if (rc != QLA_SUCCESS)
				ql_log(ql_log_warn, vha, 0xf085,
				    "Schedule logo failed sess %p rc %d\n",
				    sess, rc);
			else
				logout_started = true;
		}
964
	}
965

966 967 968 969 970 971
	/*
	 * Release the target session for FC Nexus from fabric module code.
	 */
	if (sess->se_sess != NULL)
		ha->tgt.tgt_ops->free_session(sess);

972 973 974 975 976 977 978 979 980 981 982 983 984
	if (logout_started) {
		bool traced = false;

		while (!ACCESS_ONCE(sess->logout_completed)) {
			if (!traced) {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
					"%s: waiting for sess %p logout\n",
					__func__, sess);
				traced = true;
			}
			msleep(100);
		}

985
		ql_dbg(ql_dbg_disc, vha, 0xf087,
986 987 988 989 990 991 992
		    "%s: sess %p logout completed\n",__func__, sess);
	}

	if (sess->logo_ack_needed) {
		sess->logo_ack_needed = 0;
		qla24xx_async_notify_ack(vha, sess,
			(struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
993 994
	}

995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
	if (sess->se_sess) {
		sess->se_sess = NULL;
		if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
			tgt->sess_count--;
	}

	sess->disc_state = DSC_DELETED;
	sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
	sess->deleted = QLA_SESS_DELETED;
	sess->login_retry = vha->hw->login_retry_count;

	if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
		vha->fcport_count--;
		sess->login_succ = 0;
	}

	if (sess->chip_reset != sess->vha->hw->chip_reset)
		qla2x00_clear_loop_id(sess);

	if (sess->conflict) {
		sess->conflict->login_pause = 0;
		sess->conflict = NULL;
		if (!test_bit(UNLOADING, &vha->dpc_flags))
			set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
	}

1022
	{
1023
		struct qlt_plogi_ack_t *own =
1024
		    sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1025
		struct qlt_plogi_ack_t *con =
1026
		    sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1027
		struct imm_ntfy_from_isp *iocb;
1028 1029

		if (con) {
1030
			iocb = &con->iocb;
1031
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1032 1033 1034 1035 1036 1037
				 "se_sess %p / sess %p port %8phC is gone,"
				 " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
				 sess->se_sess, sess, sess->port_name,
				 own ? "releasing own PLOGI" : "no own PLOGI pending",
				 own ? own->ref_count : -1,
				 iocb->u.isp24.port_name, con->ref_count);
1038
			qlt_plogi_ack_unref(vha, con);
1039
			sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1040 1041 1042 1043 1044 1045 1046 1047 1048
		} else {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
			    "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
			    sess->se_sess, sess, sess->port_name,
			    own ? "releasing own PLOGI" :
			    "no own PLOGI pending",
			    own ? own->ref_count : -1);
		}

1049 1050
		if (own) {
			sess->fw_login_state = DSC_LS_PLOGI_PEND;
1051
			qlt_plogi_ack_unref(vha, own);
1052 1053
			sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
		}
1054
	}
1055 1056
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

1057
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1058 1059
	    "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
		sess, sess->port_name, vha->fcport_count);
1060

1061
	if (tgt && (tgt->sess_count == 0))
1062
		wake_up_all(&tgt->waitQ);
1063 1064 1065 1066

	if (vha->fcport_count == 0)
		wake_up_all(&vha->fcport_waitQ);

1067 1068 1069 1070
	base_vha = pci_get_drvdata(ha->pdev);
	if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
		return;

1071 1072 1073 1074 1075 1076
	if (!tgt || !tgt->tgt_stop) {
		memset(&ea, 0, sizeof(ea));
		ea.event = FCME_DELETE_DONE;
		ea.fcport = sess;
		qla2x00_fcport_event_handler(vha, &ea);
	}
1077 1078
}

1079
/* ha->tgt.sess_lock supposed to be held on entry */
1080
void qlt_unreg_sess(struct fc_port *sess)
1081 1082 1083
{
	struct scsi_qla_host *vha = sess->vha;

1084 1085 1086 1087
	ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
	    "%s sess %p for deletion %8phC\n",
	    __func__, sess, sess->port_name);

1088 1089
	if (sess->se_sess)
		vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1090

1091 1092
	qla2x00_mark_device_lost(vha, sess, 1, 1);

1093
	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1094 1095 1096
	sess->disc_state = DSC_DELETE_PEND;
	sess->last_rscn_gen = sess->rscn_gen;
	sess->last_login_gen = sess->login_gen;
1097 1098 1099 1100

	INIT_WORK(&sess->free_work, qlt_free_session_done);
	schedule_work(&sess->free_work);
}
1101
EXPORT_SYMBOL(qlt_unreg_sess);
1102

1103 1104 1105
static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
{
	struct qla_hw_data *ha = vha->hw;
1106
	struct fc_port *sess = NULL;
1107 1108 1109
	uint16_t loop_id;
	int res = 0;
	struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1110
	unsigned long flags;
1111 1112 1113 1114

	loop_id = le16_to_cpu(n->u.isp24.nport_handle);
	if (loop_id == 0xFFFF) {
		/* Global event */
1115
		atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1116
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1117
		qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1118
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1119
	} else {
1120
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1121
		sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1122
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
	}

	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,
1133 1134
	    "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
	    "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1135 1136
	    mcmd, loop_id);

1137
	return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1138 1139
}

1140 1141 1142 1143 1144 1145 1146 1147 1148 1149
static void qla24xx_chk_fcp_state(struct fc_port *sess)
{
	if (sess->chip_reset != sess->vha->hw->chip_reset) {
		sess->logout_on_delete = 0;
		sess->logo_ack_needed = 0;
		sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
		sess->scan_state = 0;
	}
}

1150
/* ha->tgt.sess_lock supposed to be held on entry */
1151
void qlt_schedule_sess_for_deletion(struct fc_port *sess,
1152 1153 1154 1155
	bool immediate)
{
	struct qla_tgt *tgt = sess->tgt;

1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166
	if (sess->disc_state == DSC_DELETE_PEND)
		return;

	if (sess->disc_state == DSC_DELETED) {
		if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
			wake_up_all(&tgt->waitQ);
		if (sess->vha->fcport_count == 0)
			wake_up_all(&sess->vha->fcport_waitQ);

		if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
			!sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1167 1168
			return;
	}
1169

1170
	sess->disc_state = DSC_DELETE_PEND;
1171

1172 1173 1174 1175 1176
	if (sess->deleted == QLA_SESS_DELETED)
		sess->logout_on_delete = 0;

	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
	qla24xx_chk_fcp_state(sess);
1177

1178 1179
	ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
	    "Scheduling sess %p for deletion\n", sess);
1180

1181 1182
	schedule_work(&sess->del_work);
}
1183

1184 1185 1186 1187 1188 1189 1190
void qlt_schedule_sess_for_deletion_lock(struct fc_port *sess)
{
	unsigned long flags;
	struct qla_hw_data *ha = sess->vha->hw;
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
	qlt_schedule_sess_for_deletion(sess, 1);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1191 1192
}

1193
/* ha->tgt.sess_lock supposed to be held on entry */
J
Joern Engel 已提交
1194
static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1195
{
1196 1197
	struct fc_port *sess;
	scsi_qla_host_t *vha = tgt->vha;
1198

1199 1200
	list_for_each_entry(sess, &vha->vp_fcports, list) {
		if (sess->se_sess)
1201
			qlt_schedule_sess_for_deletion(sess, 1);
1202
	}
1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231

	/* 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);
1232
		res = -EBUSY;
1233 1234 1235 1236
		goto out_free_id_list;
	}

	id_iter = (char *)gid_list;
1237
	res = -ENOENT;
1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259
	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;
}

/*
 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 * Caller must put it.
 */
1260
static struct fc_port *qlt_create_sess(
1261 1262 1263 1264 1265
	struct scsi_qla_host *vha,
	fc_port_t *fcport,
	bool local)
{
	struct qla_hw_data *ha = vha->hw;
1266
	struct fc_port *sess = fcport;
1267 1268
	unsigned long flags;

1269 1270
	if (vha->vha_tgt.qla_tgt->tgt_stop)
		return NULL;
1271

1272 1273 1274 1275 1276 1277
	if (fcport->se_sess) {
		if (!kref_get_unless_zero(&sess->sess_kref)) {
			ql_dbg(ql_dbg_disc, vha, 0xffff,
			    "%s: kref_get_unless_zero failed for %8phC\n",
			    __func__, sess->port_name);
			return NULL;
1278
		}
1279
		return fcport;
1280
	}
1281
	sess->tgt = vha->vha_tgt.qla_tgt;
1282
	sess->local = local;
1283

1284 1285
	/*
	 * Under normal circumstances we want to logout from firmware when
1286 1287
	 * session eventually ends and release corresponding nport handle.
	 * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1288 1289
	 * code will adjust these flags as necessary.
	 */
1290 1291
	sess->logout_on_delete = 1;
	sess->keep_nport_handle = 0;
1292
	sess->logout_completed = 0;
1293

1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311
	if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
	    &fcport->port_name[0], sess) < 0) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
		    "(%d) %8phC check_initiator_node_acl failed\n",
		    vha->vp_idx, fcport->port_name);
		return NULL;
	} else {
		kref_init(&fcport->sess_kref);
		/*
		 * Take an extra reference to ->sess_kref here to handle
		 * fc_port access across ->tgt.sess_lock reaquire.
		 */
		if (!kref_get_unless_zero(&sess->sess_kref)) {
			ql_dbg(ql_dbg_disc, vha, 0xffff,
			    "%s: kref_get_unless_zero failed for %8phC\n",
			    __func__, sess->port_name);
			return NULL;
		}
1312

1313 1314 1315
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
		if (!IS_SW_RESV_ADDR(sess->d_id))
			vha->vha_tgt.qla_tgt->sess_count++;
1316

1317 1318 1319 1320 1321 1322 1323 1324
		qlt_do_generation_tick(vha, &sess->generation);
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
	}

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
	    "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
	    sess, sess->se_sess, vha->vha_tgt.qla_tgt,
	    vha->vha_tgt.qla_tgt->sess_count);
1325 1326

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1327 1328 1329
	    "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,
1330 1331
	    fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
	    sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1332 1333 1334 1335

	return sess;
}

1336 1337 1338 1339 1340 1341
/*
 * max_gen - specifies maximum session generation
 * at which this deletion requestion is still valid
 */
void
qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1342
{
1343
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1344
	struct fc_port *sess = fcport;
1345
	unsigned long flags;
1346 1347 1348 1349

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

1350
	if (!tgt)
1351 1352
		return;

1353
	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1354
	if (tgt->tgt_stop) {
1355
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1356 1357
		return;
	}
1358
	if (!sess->se_sess) {
1359
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1360 1361 1362
		return;
	}

1363
	if (max_gen - sess->generation < 0) {
1364
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1365 1366 1367 1368 1369 1370 1371 1372
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
		    "Ignoring stale deletion request for se_sess %p / sess %p"
		    " for port %8phC, req_gen %d, sess_gen %d\n",
		    sess->se_sess, sess, sess->port_name, max_gen,
		    sess->generation);
		return;
	}

1373 1374 1375 1376
	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);
1377
	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388
}

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()
	 */
1389
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1390
	ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1391 1392
	    "tgt %p, sess_count=%d\n",
	    tgt, tgt->sess_count);
1393
	res = (tgt->sess_count == 0);
1394
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1395 1396 1397 1398 1399

	return res;
}

/* Called by tcm_qla2xxx configfs code */
1400
int qlt_stop_phase1(struct qla_tgt *tgt)
1401 1402 1403 1404 1405
{
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = tgt->ha;
	unsigned long flags;

1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420
	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;
		}
	}
1421 1422 1423
	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");
1424 1425
		mutex_unlock(&qla_tgt_mutex);
		return -EPERM;
1426 1427 1428 1429 1430 1431 1432 1433
	}

	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.
	 */
1434
	mutex_lock(&vha->vha_tgt.tgt_mutex);
1435
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1436
	tgt->tgt_stop = 1;
J
Joern Engel 已提交
1437
	qlt_clear_tgt_db(tgt);
1438
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1439
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1440
	mutex_unlock(&qla_tgt_mutex);
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452

	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,
1453
	    "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1454 1455 1456 1457

	wait_event(tgt->waitQ, test_tgt_sess_count(tgt));

	/* Big hammer */
1458 1459
	if (!ha->flags.host_shutting_down &&
	    (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1460 1461 1462 1463
		qlt_disable_vha(vha);

	/* Wait for sessions to clear out (just in case) */
	wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1464
	return 0;
1465 1466 1467 1468 1469 1470 1471
}
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;
1472
	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1473 1474 1475
	unsigned long flags;

	if (tgt->tgt_stopped) {
1476
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1477 1478 1479 1480 1481
		    "Already in tgt->tgt_stopped state\n");
		dump_stack();
		return;
	}

1482
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1483 1484 1485
	    "Waiting for %d IRQ commands to complete (tgt %p)",
	    tgt->irq_cmd_count, tgt);

1486
	mutex_lock(&vha->vha_tgt.tgt_mutex);
1487
	spin_lock_irqsave(&ha->hardware_lock, flags);
1488
	while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1489 1490 1491 1492 1493 1494 1495
		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);
1496
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1497

1498
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1499 1500 1501 1502 1503
	    tgt);
}
EXPORT_SYMBOL(qlt_stop_phase2);

/* Called from qlt_remove_target() -> qla2x00_remove_one() */
1504
static void qlt_release(struct qla_tgt *tgt)
1505
{
1506
	scsi_qla_host_t *vha = tgt->vha;
1507

1508
	if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1509 1510
		qlt_stop_phase2(tgt);

1511
	vha->vha_tgt.qla_tgt = NULL;
1512

1513
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
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 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576
	    "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;
	}

1577 1578
	if (vha->vha_tgt.qla_tgt != NULL)
		vha->vha_tgt.qla_tgt->notify_ack_expected++;
1579 1580 1581 1582 1583 1584 1585

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

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

1586
	nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1587 1588 1589
	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 &
1590
			cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1591 1592 1593 1594
	}
	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;
1595
	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607
	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);

1608 1609
	/* Memory Barrier */
	wmb();
1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632
	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;

1633
	resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647
	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;
1648
	f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
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
	    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 */
	}

1685
	vha->vha_tgt.qla_tgt->abts_resp_expected++;
1686

1687 1688
	/* Memory Barrier */
	wmb();
1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705
	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;

1706
	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722
	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;
1723
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1724 1725 1726 1727 1728
	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;
1729 1730
	ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
					    CTIO7_FLAGS_TERMINATE);
1731
	ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1732

1733 1734
	/* Memory Barrier */
	wmb();
1735 1736 1737 1738 1739 1740
	qla2x00_start_iocbs(vha, vha->req);

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

1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755
static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
{
	struct qla_tgt_sess_op *op;
	struct qla_tgt_cmd *cmd;

	spin_lock(&vha->cmd_list_lock);

	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
		if (tag == op->atio.u.isp24.exchange_addr) {
			op->aborted = true;
			spin_unlock(&vha->cmd_list_lock);
			return 1;
		}
	}

1756 1757 1758 1759 1760 1761 1762 1763
	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
		if (tag == op->atio.u.isp24.exchange_addr) {
			op->aborted = true;
			spin_unlock(&vha->cmd_list_lock);
			return 1;
		}
	}

1764 1765
	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		if (tag == cmd->atio.u.isp24.exchange_addr) {
1766
			cmd->aborted = 1;
1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799
			spin_unlock(&vha->cmd_list_lock);
			return 1;
		}
	}

	spin_unlock(&vha->cmd_list_lock);
	return 0;
}

/* drop cmds for the given lun
 * XXX only looks for cmds on the port through which lun reset was recieved
 * XXX does not go through the list of other port (which may have cmds
 *     for the same lun)
 */
static void abort_cmds_for_lun(struct scsi_qla_host *vha,
				uint32_t lun, uint8_t *s_id)
{
	struct qla_tgt_sess_op *op;
	struct qla_tgt_cmd *cmd;
	uint32_t key;

	key = sid_to_key(s_id);
	spin_lock(&vha->cmd_list_lock);
	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
		uint32_t op_key;
		uint32_t op_lun;

		op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
		op_lun = scsilun_to_int(
			(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
		if (op_key == key && op_lun == lun)
			op->aborted = true;
	}
1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811

	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
		uint32_t op_key;
		u64 op_lun;

		op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
		op_lun = scsilun_to_int(
			(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
		if (op_key == key && op_lun == lun)
			op->aborted = true;
	}

1812 1813 1814 1815 1816 1817 1818 1819
	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		uint32_t cmd_key;
		uint32_t cmd_lun;

		cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
		cmd_lun = scsilun_to_int(
			(struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
		if (cmd_key == key && cmd_lun == lun)
1820
			cmd->aborted = 1;
1821 1822 1823 1824
	}
	spin_unlock(&vha->cmd_list_lock);
}

1825 1826
/* ha->hardware_lock supposed to be held on entry */
static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1827
	struct abts_recv_from_24xx *abts, struct fc_port *sess)
1828 1829
{
	struct qla_hw_data *ha = vha->hw;
1830
	struct se_session *se_sess = sess->se_sess;
1831
	struct qla_tgt_mgmt_cmd *mcmd;
1832 1833
	struct se_cmd *se_cmd;
	u32 lun = 0;
1834
	int rc;
1835
	bool found_lun = false;
1836
	unsigned long flags;
1837

1838
	spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
1839 1840 1841
	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);
1842
		if (se_cmd->tag == abts->exchange_addr_to_abort) {
1843 1844 1845 1846 1847
			lun = cmd->unpacked_lun;
			found_lun = true;
			break;
		}
	}
1848
	spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
1849

1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862
	/* cmd not in LIO lists, look in qla list */
	if (!found_lun) {
		if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
			/* send TASK_ABORT response immediately */
			qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
			return 0;
		} else {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
			    "unable to find cmd in driver or LIO for tag 0x%x\n",
			    abts->exchange_addr_to_abort);
			return -ENOENT;
		}
	}
1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878

	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));
1879
	mcmd->reset_count = vha->hw->chip_reset;
1880
	mcmd->tmr_func = QLA_TGT_ABTS;
1881

1882
	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func,
1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901
	    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;
1902
	struct fc_port *sess;
1903 1904 1905
	uint32_t tag = abts->exchange_addr_to_abort;
	uint8_t s_id[3];
	int rc;
1906
	unsigned long flags;
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

	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];

1934
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1935 1936 1937 1938 1939
	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);
1940
		rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1941
		    QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1942 1943 1944

		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

1945 1946 1947 1948 1949 1950
		if (rc != 0) {
			qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
			    false);
		}
		return;
	}
1951 1952
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

1953

1954
	if (sess->deleted) {
1955 1956 1957 1958
		qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
		return;
	}

1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976
	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;
1977
	uint16_t temp;
1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998

	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;
1999
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2000 2001 2002 2003 2004 2005
	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) |
2006
	    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
2007 2008
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio->u.status1.ox_id = cpu_to_le16(temp);
2009
	ctio->u.status1.scsi_status =
2010 2011
	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
	ctio->u.status1.response_len = cpu_to_le16(8);
2012
	ctio->u.status1.sense_data[0] = resp_code;
2013

2014 2015
	/* Memory Barrier */
	wmb();
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036
	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);
2037

2038
	if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
2039
		/*
2040
		 * Either the port is not online or this request was from
2041 2042 2043
		 * previous life, just abort the processing.
		 */
		ql_dbg(ql_dbg_async, vha, 0xe100,
2044 2045 2046
			"RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
			mcmd->reset_count, ha->chip_reset);
2047 2048 2049 2050 2051
		ha->tgt.tgt_ops->free_mcmd(mcmd);
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return;
	}

2052 2053
	if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
		if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2054 2055 2056 2057 2058
		    ELS_LOGO ||
		    mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
		    ELS_PRLO ||
		    mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
		    ELS_TPRLO) {
2059 2060 2061 2062 2063 2064 2065 2066 2067 2068
			ql_dbg(ql_dbg_disc, vha, 0xffff,
			    "TM response logo %phC status %#x state %#x",
			    mcmd->sess->port_name, mcmd->fc_tm_rsp,
			    mcmd->flags);
			qlt_schedule_sess_for_deletion_lock(mcmd->sess);
		} else {
			qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
				0, 0, 0, 0, 0, 0);
		}
	} else {
2069
		if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103
			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;

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
	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;
		}
	}
2140 2141 2142 2143 2144 2145 2146 2147 2148 2149

	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
2150
static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2151 2152 2153
{
	struct qla_hw_data *ha = vha->hw;

J
Joern Engel 已提交
2154 2155 2156
	if (!cmd->sg_mapped)
		return;

2157 2158
	pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
	cmd->sg_mapped = 0;
2159 2160 2161 2162 2163 2164 2165 2166 2167 2168

	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);
2169 2170 2171 2172 2173
}

static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
	uint32_t req_cnt)
{
2174
	uint32_t cnt, cnt_in;
2175 2176

	if (vha->req->cnt < (req_cnt + 2)) {
2177
		cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
2178
		cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
2179 2180 2181 2182 2183 2184 2185

		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);

2186 2187 2188 2189 2190 2191 2192 2193
		if (unlikely(vha->req->cnt < (req_cnt + 2))) {
			ql_dbg(ql_dbg_io, vha, 0x305a,
			    "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);
			return -EAGAIN;
		}
2194
	}
2195

2196 2197 2198 2199 2200 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
	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;
2227
		if (h > DEFAULT_OUTSTANDING_COMMANDS)
2228 2229
			h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
		if (h == ha->tgt.current_handle) {
2230
			ql_dbg(ql_dbg_io, vha, 0x305b,
2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253
			    "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;
2254
	uint16_t temp;
2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276

	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;
2277
	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2278 2279 2280 2281 2282
	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);
2283 2284
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	pkt->u.status0.ox_id = cpu_to_le16(temp);
2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 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 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
	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;

	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;
2438
		ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2439 2440 2441 2442
		    "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
		       prm->residual, se_cmd->tag,
		       se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
		       cmd->bufflen, prm->rq_result);
2443 2444 2445
		prm->rq_result |= SS_RESIDUAL_UNDER;
	} else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
		prm->residual = se_cmd->residual_count;
2446
		ql_dbg(ql_dbg_io, vha, 0x305d,
2447 2448 2449
		    "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
		       prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
		       se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488
		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;
}

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));
2489
	ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2490
	if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2491
		ctio->u.status0.flags |= cpu_to_le16(
2492 2493 2494 2495 2496 2497 2498 2499 2500
		    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)) {
2501
			if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2502 2503 2504 2505 2506 2507
				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;
			}
2508
			ctio->u.status1.flags |= cpu_to_le16(
2509 2510 2511 2512 2513
			    CTIO7_FLAGS_EXPLICIT_CONFORM |
			    CTIO7_FLAGS_CONFORM_REQ);
		}
skip_explict_conf:
		ctio->u.status1.flags &=
2514
		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2515
		ctio->u.status1.flags |=
2516
		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2517
		ctio->u.status1.scsi_status |=
2518
		    cpu_to_le16(SS_SENSE_LEN_VALID);
2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537
		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 &=
2538
		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2539
		ctio->u.status1.flags |=
2540
		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2541 2542 2543 2544 2545 2546 2547 2548
		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 ??? */
}

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


/* 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[]
	 */
2595
	ctx->app_tag = 0;
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 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675
	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;
	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;
2676
	uint16_t t16;
2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766

	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;
2767
	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2768 2769 2770 2771
	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;
2772 2773 2774 2775 2776 2777 2778

	/* 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);
2779 2780 2781 2782
	pkt->relative_offset = cpu_to_le32(prm->cmd->offset);

	/* Set transfer direction */
	if (cmd->dma_data_direction == DMA_TO_DEVICE)
2783
		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2784
	else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2785
		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836


	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);
2837
	crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2838 2839 2840


	/* Walks data segments */
2841
	pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852

	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 */
2853
		pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868

		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;
}


2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883
/*
 * 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;

2884
	spin_lock_irqsave(&ha->hardware_lock, flags);
2885
	if (cmd->sess && cmd->sess->deleted) {
2886 2887 2888 2889 2890
		cmd->state = QLA_TGT_STATE_PROCESSED;
		if (cmd->sess->logout_completed)
			/* no need to terminate. FW already freed exchange. */
			qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
		else
2891
			qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
2892 2893 2894 2895 2896
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return 0;
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

2897 2898 2899
	memset(&prm, 0, sizeof(prm));

	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2900 2901 2902 2903
	    "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);
2904 2905 2906 2907 2908 2909 2910 2911 2912

	res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
	    &full_req_cnt);
	if (unlikely(res != 0)) {
		return res;
	}

	spin_lock_irqsave(&ha->hardware_lock, flags);

2913 2914 2915 2916 2917
	if (xmit_type == QLA_TGT_XMIT_STATUS)
		vha->tgt_counters.core_qla_snd_status++;
	else
		vha->tgt_counters.core_qla_que_buf++;

2918
	if (!vha->flags.online || cmd->reset_count != ha->chip_reset) {
2919
		/*
2920
		 * Either the port is not online or this request was from
2921 2922 2923 2924 2925
		 * 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,
2926 2927 2928
			"RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
			cmd->reset_count, ha->chip_reset);
2929 2930 2931 2932
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return 0;
	}

2933 2934 2935 2936 2937
	/* 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;

2938 2939 2940 2941
	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);
2942 2943
	if (unlikely(res != 0)) {
		vha->req->cnt += full_req_cnt;
2944
		goto out_unmap_unlock;
2945
	}
2946 2947 2948 2949 2950

	pkt = (struct ctio7_to_24xx *)prm.pkt;

	if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
		pkt->u.status0.flags |=
2951
		    cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2952 2953
			CTIO7_FLAGS_STATUS_MODE_0);

2954 2955
		if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
			qlt_load_data_segments(&prm, vha);
2956 2957 2958 2959 2960 2961 2962

		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);
2963
				pkt->u.status0.flags |= cpu_to_le16(
2964 2965 2966
				    CTIO7_FLAGS_SEND_STATUS);
				if (qlt_need_explicit_conf(ha, cmd, 0)) {
					pkt->u.status0.flags |=
2967
					    cpu_to_le16(
2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981
						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);

2982 2983 2984
			ql_dbg(ql_dbg_io, vha, 0x305e,
			    "Building additional status packet 0x%p.\n",
			    ctio);
2985

2986 2987 2988 2989
			/*
			 * T10Dif: ctio_crc2_to_fw overlay ontop of
			 * ctio7_to_24xx
			 */
2990
			memcpy(ctio, pkt, sizeof(*ctio));
2991
			/* reset back to CTIO7 */
2992
			ctio->entry_count = 1;
2993
			ctio->entry_type = CTIO_TYPE7;
2994
			ctio->dseg_count = 0;
2995
			ctio->u.status1.flags &= ~cpu_to_le16(
2996 2997 2998 2999
			    CTIO7_FLAGS_DATA_IN);

			/* Real finish is ctio_m1's finish */
			pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3000
			pkt->u.status0.flags |= cpu_to_le16(
3001
			    CTIO7_FLAGS_DONT_RET_CTIO);
3002 3003 3004 3005 3006

			/* 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.
			 */
3007 3008 3009 3010 3011 3012 3013 3014 3015
			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 */
3016
	cmd->cmd_sent_to_fw = 1;
3017

3018 3019
	/* Memory Barrier */
	wmb();
3020 3021 3022 3023 3024 3025
	qla2x00_start_iocbs(vha, vha->req);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return 0;

out_unmap_unlock:
J
Joern Engel 已提交
3026
	qlt_unmap_sg(vha, cmd);
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
	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);

3059
	if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) ||
3060
	    (cmd->sess && cmd->sess->deleted)) {
3061
		/*
3062
		 * Either the port is not online or this request was from
3063 3064 3065 3066 3067
		 * 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,
3068 3069 3070
			"RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
			cmd->reset_count, ha->chip_reset);
3071 3072 3073 3074
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return 0;
	}

3075 3076 3077 3078
	/* 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;
3079 3080 3081 3082
	if (cmd->se_cmd.prot_op)
		res = qlt_build_ctio_crc2_pkt(&prm, vha);
	else
		res = qlt_24xx_build_ctio_pkt(&prm, vha);
3083

3084 3085
	if (unlikely(res != 0)) {
		vha->req->cnt += prm.req_cnt;
3086
		goto out_unlock_free_unmap;
3087 3088
	}

3089
	pkt = (struct ctio7_to_24xx *)prm.pkt;
3090
	pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3091
	    CTIO7_FLAGS_STATUS_MODE_0);
3092 3093 3094

	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
		qlt_load_data_segments(&prm, vha);
3095 3096

	cmd->state = QLA_TGT_STATE_NEED_DATA;
3097
	cmd->cmd_sent_to_fw = 1;
3098

3099 3100
	/* Memory Barrier */
	wmb();
3101 3102 3103 3104 3105 3106
	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
3107
	qlt_unmap_sg(vha, cmd);
3108 3109 3110 3111 3112 3113
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return res;
}
EXPORT_SYMBOL(qlt_rdy_to_xfer);

3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141

/*
 * 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,
3142
	    "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",
3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164
	    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) {
3165
			uint32_t i, k = 0, num_ent;
3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249
			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;
				}
				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;
}


3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272
/* 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_imm_notif(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *ntfy)
{
	struct nack_to_isp *nack;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	int ret = 0;

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

	pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
	if (pkt == NULL) {
		ql_dbg(ql_dbg_tgt, vha, 0xe080,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet\n", vha->vp_idx, __func__);
		return -ENOMEM;
	}

	pkt->entry_type = NOTIFY_ACK_TYPE;
	pkt->entry_count = 1;
3273
	pkt->handle = QLA_TGT_SKIP_HANDLE;
3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315

	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);
	}

	/* terminate */
	nack->u.isp24.flags |=
		__constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);

	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;
	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
	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.vp_index = ntfy->u.isp24.vp_index;

	qla2x00_start_iocbs(vha, vha->req);
	return ret;
}

static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *imm, int ha_locked)
{
	unsigned long flags = 0;
	int rc;

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

	if (ha_locked) {
		rc = __qlt_send_term_imm_notif(vha, imm);

#if 0	/* Todo  */
		if (rc == -ENOMEM)
			qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3316 3317 3318
#else
		if (rc) {
		}
3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335
#endif
		goto done;
	}

	spin_lock_irqsave(&vha->hw->hardware_lock, flags);
	rc = __qlt_send_term_imm_notif(vha, imm);

#if 0	/* Todo */
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, imm, 0, 0);
#endif

done:
	if (!ha_locked)
		spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
}

3336 3337 3338 3339 3340 3341 3342 3343 3344 3345
/* 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;
3346
	uint16_t temp;
3347 3348 3349

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

3350
	pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367
	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;
	}

3368
	vha->tgt_counters.num_term_xchg_sent++;
3369 3370 3371 3372 3373
	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;
3374
	ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3375
	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3376 3377 3378 3379 3380 3381
	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) |
3382
	    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3383
		CTIO7_FLAGS_TERMINATE);
3384 3385
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio24->u.status1.ox_id = cpu_to_le16(temp);
3386 3387 3388 3389 3390 3391 3392 3393

	/* 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;

3394 3395
	/* Memory Barrier */
	wmb();
3396 3397 3398 3399 3400
	qla2x00_start_iocbs(vha, vha->req);
	return ret;
}

static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3401 3402
	struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
	int ul_abort)
3403
{
3404
	unsigned long flags = 0;
3405 3406 3407 3408 3409 3410 3411
	int rc;

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

	if (ha_locked) {
		rc = __qlt_send_term_exchange(vha, cmd, atio);
3412 3413
		if (rc == -ENOMEM)
			qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3414 3415 3416 3417
		goto done;
	}
	spin_lock_irqsave(&vha->hw->hardware_lock, flags);
	rc = __qlt_send_term_exchange(vha, cmd, atio);
3418 3419
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3420

3421
done:
3422
	if (cmd && !ul_abort && !cmd->aborted) {
3423 3424
		if (cmd->sg_mapped)
			qlt_unmap_sg(vha, cmd);
3425 3426
		vha->hw->tgt.tgt_ops->free_cmd(cmd);
	}
3427 3428 3429 3430

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

3431
	return;
3432 3433
}

3434 3435 3436 3437 3438 3439
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 =
3440
	    (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469

	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",
3470
		    total_leaked, vha->hw->cur_fw_xcb_count);
3471 3472 3473 3474 3475 3476 3477 3478 3479 3480

		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);
	}

}

3481
int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3482 3483 3484 3485
{
	struct qla_tgt *tgt = cmd->tgt;
	struct scsi_qla_host *vha = tgt->vha;
	struct se_cmd *se_cmd = &cmd->se_cmd;
3486
	unsigned long flags;
3487 3488 3489 3490 3491 3492

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
	    "qla_target(%d): terminating exchange for aborted cmd=%p "
	    "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
	    se_cmd->tag);

3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506
	spin_lock_irqsave(&cmd->cmd_lock, flags);
	if (cmd->aborted) {
		spin_unlock_irqrestore(&cmd->cmd_lock, flags);
		/*
		 * It's normal to see 2 calls in this path:
		 *  1) XFER Rdy completion + CMD_T_ABORT
		 *  2) TCM TMR - drain_state_list
		 */
	        ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
			"multiple abort. %p transport_state %x, t_state %x,"
			" se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
			cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
		return EIO;
	}
3507
	cmd->aborted = 1;
3508
	cmd->trc_flags |= TRC_ABORT;
3509
	spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3510

3511 3512
	qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
	return 0;
3513 3514 3515
}
EXPORT_SYMBOL(qlt_abort_cmd);

3516 3517
void qlt_free_cmd(struct qla_tgt_cmd *cmd)
{
3518
	struct fc_port *sess = cmd->sess;
3519

3520 3521 3522 3523
	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));
3524

3525 3526
	BUG_ON(cmd->cmd_in_wq);

3527 3528 3529
	if (cmd->sg_mapped)
		qlt_unmap_sg(cmd->vha, cmd);

3530 3531 3532
	if (!cmd->q_full)
		qlt_decr_num_pend_cmds(cmd->vha);

3533
	BUG_ON(cmd->sg_mapped);
3534
	cmd->jiffies_at_free = get_jiffies_64();
3535 3536
	if (unlikely(cmd->free_sg))
		kfree(cmd->sg);
3537 3538 3539 3540 3541

	if (!sess || !sess->se_sess) {
		WARN_ON(1);
		return;
	}
3542
	cmd->jiffies_at_free = get_jiffies_64();
3543
	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557
}
EXPORT_SYMBOL(qlt_free_cmd);

/*
 * 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 &
3558
		    cpu_to_le16(OF_TERM_EXCH));
3559 3560 3561 3562
	} else
		term = 1;

	if (term)
3563
		qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593

	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) {
3594
		if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3595
			return NULL;
3596

3597
		/* handle-1 is actually used */
3598
		if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622
			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;
}

3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654
/* 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 {
		ql_dbg(ql_dbg_io, vha, 0xff03,
		    "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
		    cmd->state);
		dump_stack();
	}

3655
	cmd->trc_flags |= TRC_FLUSH;
3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694
	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);
}


3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715
/*
 * 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 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);
3716
	if (cmd == NULL)
3717
		return;
3718

3719
	se_cmd = &cmd->se_cmd;
3720
	cmd->cmd_sent_to_fw = 0;
3721

J
Joern Engel 已提交
3722
	qlt_unmap_sg(vha, cmd);
3723 3724 3725 3726 3727 3728

	if (unlikely(status != CTIO_SUCCESS)) {
		switch (status & 0xFFFF) {
		case CTIO_LIP_RESET:
		case CTIO_TARGET_RESET:
		case CTIO_ABORTED:
3729
			/* driver request abort via Terminate exchange */
3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742
		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:
3743
		{
3744 3745 3746
			int logged_out =
				(status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;

3747
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3748
			    "qla_target(%d): CTIO with %s status %x "
3749
			    "received (state %x, se_cmd %p)\n", vha->vp_idx,
3750
			    logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3751 3752
			    status, cmd->state, se_cmd);

3753 3754 3755 3756 3757 3758 3759
			if (logged_out && cmd->sess) {
				/*
				 * Session is already logged out, but we need
				 * to notify initiator, who's not aware of this
				 */
				cmd->sess->logout_on_delete = 0;
				cmd->sess->send_els_logo = 1;
3760 3761 3762 3763 3764
				ql_dbg(ql_dbg_disc, vha, 0xffff,
				    "%s %d %8phC post del sess\n",
				    __func__, __LINE__, cmd->sess->port_name);

				qlt_schedule_sess_for_deletion_lock(cmd->sess);
3765 3766 3767
			}
			break;
		}
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
		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;
		}
3799 3800
		default:
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3801
			    "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3802 3803 3804 3805
			    vha->vp_idx, status, cmd->state, se_cmd);
			break;
		}

3806

3807
		/* "cmd->aborted" means
3808 3809 3810 3811 3812 3813
		 * 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) &&
3814
		    (!cmd->aborted)) {
3815
			cmd->trc_flags |= TRC_CTIO_ERR;
3816 3817
			if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
				return;
3818
		}
3819
	}
3820
skip_term:
3821 3822

	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3823
		cmd->trc_flags |= TRC_CTIO_DONE;
3824 3825 3826
	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
		cmd->state = QLA_TGT_STATE_DATA_IN;

3827
		if (status == CTIO_SUCCESS)
3828 3829 3830 3831
			cmd->write_data_transferred = 1;

		ha->tgt.tgt_ops->handle_data(cmd);
		return;
3832
	} else if (cmd->aborted) {
3833
		cmd->trc_flags |= TRC_CTIO_ABORTED;
3834
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3835
		  "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3836
	} else {
3837
		cmd->trc_flags |= TRC_CTIO_STRANGE;
3838 3839 3840 3841 3842
		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);
	}

3843
	if (unlikely(status != CTIO_SUCCESS) &&
3844
		!cmd->aborted) {
3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
		dump_stack();
	}

	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
3859
		fcp_task_attr = TCM_SIMPLE_TAG;
3860 3861
		break;
	case ATIO_HEAD_OF_QUEUE:
C
Christoph Hellwig 已提交
3862
		fcp_task_attr = TCM_HEAD_TAG;
3863 3864
		break;
	case ATIO_ORDERED_QUEUE:
C
Christoph Hellwig 已提交
3865
		fcp_task_attr = TCM_ORDERED_TAG;
3866 3867
		break;
	case ATIO_ACA_QUEUE:
C
Christoph Hellwig 已提交
3868
		fcp_task_attr = TCM_ACA_TAG;
3869 3870
		break;
	case ATIO_UNTAGGED:
C
Christoph Hellwig 已提交
3871
		fcp_task_attr = TCM_SIMPLE_TAG;
3872 3873 3874 3875 3876
		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
3877
		fcp_task_attr = TCM_ORDERED_TAG;
3878 3879 3880 3881 3882 3883
		break;
	}

	return fcp_task_attr;
}

3884
static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
3885 3886 3887 3888
					uint8_t *);
/*
 * Process context for I/O path into tcm_qla2xxx code
 */
3889
static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3890 3891 3892
{
	scsi_qla_host_t *vha = cmd->vha;
	struct qla_hw_data *ha = vha->hw;
3893
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3894
	struct fc_port *sess = cmd->sess;
3895 3896 3897 3898 3899 3900
	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;

3901
	cmd->cmd_in_wq = 0;
3902
	cmd->trc_flags |= TRC_DO_WORK;
3903 3904 3905
	if (tgt->tgt_stop)
		goto out_term;

3906
	if (cmd->aborted) {
3907 3908 3909 3910 3911 3912
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
		    "cmd with tag %u is aborted\n",
		    cmd->atio.u.isp24.exchange_addr);
		goto out_term;
	}

3913
	spin_lock_init(&cmd->cmd_lock);
3914
	cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3915
	cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935
	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]));

3936 3937
	ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
				          fcp_task_attr, data_dir, bidi);
3938 3939 3940 3941 3942
	if (ret != 0)
		goto out_term;
	/*
	 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
	 */
3943
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3944
	ha->tgt.tgt_ops->put_sess(sess);
3945
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3946 3947 3948
	return;

out_term:
3949
	ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3950
	/*
3951 3952
	 * cmd has not sent to target yet, so pass NULL as the second
	 * argument to qlt_send_term_exchange() and free the memory here.
3953
	 */
3954
	cmd->trc_flags |= TRC_DO_WORK_ERR;
3955
	spin_lock_irqsave(&ha->hardware_lock, flags);
3956
	qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
3957 3958

	qlt_decr_num_pend_cmds(vha);
3959 3960
	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
3961 3962

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3963
	ha->tgt.tgt_ops->put_sess(sess);
3964
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3965 3966 3967 3968 3969
}

static void qlt_do_work(struct work_struct *work)
{
	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3970 3971 3972 3973 3974 3975
	scsi_qla_host_t *vha = cmd->vha;
	unsigned long flags;

	spin_lock_irqsave(&vha->cmd_list_lock, flags);
	list_del(&cmd->cmd_list);
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3976 3977 3978 3979 3980

	__qlt_do_work(cmd);
}

static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3981
				       struct fc_port *sess,
3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997
				       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;
3998
	qlt_incr_num_pend_cmds(vha);
3999 4000 4001 4002 4003 4004
	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;

4005
	cmd->trc_flags = 0;
4006 4007 4008 4009
	cmd->jiffies_at_alloc = get_jiffies_64();

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

4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021
	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;
4022
	struct fc_port *sess;
4023 4024 4025 4026
	struct qla_tgt_cmd *cmd;
	unsigned long flags;
	uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;

4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
	list_del(&op->cmd_list);
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);

	if (op->aborted) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
		    "sess_op with tag %u is aborted\n",
		    op->atio.u.isp24.exchange_addr);
		goto out_term;
	}

4038
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
4039 4040 4041
	    "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]);
4042 4043 4044

	if (op->atio.u.raw.entry_count > 1) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
4045
		    "Dropping multy entry atio %p\n", &op->atio);
4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062
		goto out_term;
	}

	sess = qlt_make_local_sess(vha, s_id);
	/* sess has an extra creation ref. */

	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);
4063
		ha->tgt.tgt_ops->put_sess(sess);
4064 4065 4066 4067
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		kfree(op);
		return;
	}
4068

4069
	/*
4070
	 * __qlt_do_work() will call qlt_put_sess() to release
4071 4072 4073 4074 4075 4076 4077
	 * 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);
4078
	qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
4079
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
4080
	kfree(op);
4081 4082 4083 4084 4085 4086
}

/* 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)
{
4087
	struct qla_hw_data *ha = vha->hw;
4088
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4089
	struct fc_port *sess;
4090
	struct qla_tgt_cmd *cmd;
4091
	unsigned long flags;
4092 4093

	if (unlikely(tgt->tgt_stop)) {
4094
		ql_dbg(ql_dbg_io, vha, 0x3061,
4095 4096 4097 4098
		    "New command while device %p is shutting down\n", tgt);
		return -EFAULT;
	}

4099 4100 4101 4102 4103 4104 4105 4106
	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));
4107
		op->vha = vha;
4108 4109 4110 4111 4112

		spin_lock(&vha->cmd_list_lock);
		list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
		spin_unlock(&vha->cmd_list_lock);

4113 4114 4115 4116
		INIT_WORK(&op->work, qlt_create_sess_from_atio);
		queue_work(qla_tgt_wq, &op->work);
		return 0;
	}
4117 4118 4119

	/* Another WWN used to have our s_id. Our PLOGI scheduled its
	 * session deletion, but it's still in sess_del_work wq */
4120
	if (sess->deleted) {
4121 4122 4123 4124 4125 4126
		ql_dbg(ql_dbg_io, vha, 0x3061,
		    "New command while old session %p is being deleted\n",
		    sess);
		return -EFAULT;
	}

4127 4128 4129
	/*
	 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
	 */
4130 4131 4132 4133 4134 4135 4136
	if (!kref_get_unless_zero(&sess->sess_kref)) {
		ql_dbg(ql_dbg_tgt, vha, 0xffff,
		    "%s: kref_get fail, %8phC oxid %x \n",
		    __func__, sess->port_name,
		     be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
		return -EFAULT;
	}
4137 4138

	cmd = qlt_get_tag(vha, sess, atio);
4139
	if (!cmd) {
4140
		ql_dbg(ql_dbg_io, vha, 0x3062,
4141
		    "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4142 4143 4144
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
		ha->tgt.tgt_ops->put_sess(sess);
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4145 4146 4147
		return -ENOMEM;
	}

4148
	cmd->cmd_in_wq = 1;
4149
	cmd->trc_flags |= TRC_NEW_CMD;
4150 4151
	cmd->se_cmd.cpuid = ha->msix_count ?
		ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4152

4153
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4154
	list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4155
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4156

4157
	INIT_WORK(&cmd->work, qlt_do_work);
4158 4159 4160 4161 4162 4163 4164 4165 4166 4167
	if (ha->msix_count) {
		if (cmd->atio.u.isp24.fcp_cmnd.rddata)
			queue_work_on(smp_processor_id(), qla_tgt_wq,
			    &cmd->work);
		else
			queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
			    &cmd->work);
	} else {
		queue_work(qla_tgt_wq, &cmd->work);
	}
4168 4169 4170 4171 4172
	return 0;

}

/* ha->hardware_lock supposed to be held on entry */
4173
static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4174 4175 4176 4177 4178
	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;
4179
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198
	int res;

	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;
4199
	mcmd->reset_count = vha->hw->chip_reset;
4200 4201 4202

	switch (fn) {
	case QLA_TGT_LUN_RESET:
4203 4204
	    abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
	    break;
4205 4206
	}

4207
	res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224
	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;
4225
	struct fc_port *sess;
4226
	uint32_t lun, unpacked_lun;
4227
	int fn;
4228
	unsigned long flags;
4229

4230
	tgt = vha->vha_tgt.qla_tgt;
4231 4232 4233

	lun = a->u.isp24.fcp_cmnd.lun;
	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4234 4235

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4236 4237
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    a->u.isp24.fcp_hdr.s_id);
4238 4239
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

4240 4241 4242 4243 4244 4245 4246 4247 4248 4249
	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));
	}

4250
	if (sess->deleted)
4251 4252
		return -EFAULT;

4253 4254 4255 4256 4257
	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,
4258
	struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280
{
	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);
4281
	mcmd->reset_count = vha->hw->chip_reset;
4282
	mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4283

4284
	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301
	    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;
4302
	struct fc_port *sess;
4303
	int loop_id;
4304
	unsigned long flags;
4305 4306 4307

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

4308
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4309
	sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4310 4311
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

4312 4313 4314 4315
	if (sess == NULL) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
		    "qla_target(%d): task abort for unexisting "
		    "session\n", vha->vp_idx);
4316
		return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4317 4318 4319 4320 4321 4322
		    QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
	}

	return __qlt_abort_task(vha, iocb, sess);
}

4323 4324
void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
{
4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338
	if (rc != MBS_COMMAND_COMPLETE) {
		ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
			"%s: se_sess %p / sess %p from"
			" port %8phC loop_id %#04x s_id %02x:%02x:%02x"
			" LOGO failed: %#x\n",
			__func__,
			fcport->se_sess,
			fcport,
			fcport->port_name, fcport->loop_id,
			fcport->d_id.b.domain, fcport->d_id.b.area,
			fcport->d_id.b.al_pa, rc);
	}

	fcport->logout_completed = 1;
4339 4340 4341 4342 4343 4344 4345 4346 4347
}

/*
* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
*
* Schedules sessions with matching port_id/loop_id but different wwn for
* deletion. Returns existing session with matching wwn if present.
* Null otherwise.
*/
4348 4349
struct fc_port *
qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4350
    port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4351
{
4352
	struct fc_port *sess = NULL, *other_sess;
4353 4354
	uint64_t other_wwn;

4355 4356
	*conflict_sess = NULL;

4357
	list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4358 4359 4360 4361 4362 4363 4364 4365 4366 4367

		other_wwn = wwn_to_u64(other_sess->port_name);

		if (wwn == other_wwn) {
			WARN_ON(sess);
			sess = other_sess;
			continue;
		}

		/* find other sess with nport_id collision */
4368
		if (port_id.b24 == other_sess->d_id.b24) {
4369
			if (loop_id != other_sess->loop_id) {
4370
				ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383
				    "Invalidating sess %p loop_id %d wwn %llx.\n",
				    other_sess, other_sess->loop_id, other_wwn);

				/*
				 * logout_on_delete is set by default, but another
				 * session that has the same s_id/loop_id combo
				 * might have cleared it when requested this session
				 * deletion, so don't touch it
				 */
				qlt_schedule_sess_for_deletion(other_sess, true);
			} else {
				/*
				 * Another wwn used to have our s_id/loop_id
4384
				 * kill the session, but don't free the loop_id
4385
				 */
4386 4387 4388 4389 4390
				ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
				    "Invalidating sess %p loop_id %d wwn %llx.\n",
				    other_sess, other_sess->loop_id, other_wwn);


4391 4392
				other_sess->keep_nport_handle = 1;
				*conflict_sess = other_sess;
4393 4394 4395 4396 4397 4398 4399
				qlt_schedule_sess_for_deletion(other_sess,
				    true);
			}
			continue;
		}

		/* find other sess with nport handle collision */
4400 4401 4402
		if ((loop_id == other_sess->loop_id) &&
			(loop_id != FC_NO_LOOP_ID)) {
			ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414
			       "Invalidating sess %p loop_id %d wwn %llx.\n",
			       other_sess, other_sess->loop_id, other_wwn);

			/* Same loop_id but different s_id
			 * Ok to kill and logout */
			qlt_schedule_sess_for_deletion(other_sess, true);
		}
	}

	return sess;
}

4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429
/* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
{
	struct qla_tgt_sess_op *op;
	struct qla_tgt_cmd *cmd;
	uint32_t key;
	int count = 0;

	key = (((u32)s_id->b.domain << 16) |
	       ((u32)s_id->b.area   <<  8) |
	       ((u32)s_id->b.al_pa));

	spin_lock(&vha->cmd_list_lock);
	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
		uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4430

4431 4432 4433 4434 4435
		if (op_key == key) {
			op->aborted = true;
			count++;
		}
	}
4436 4437 4438 4439 4440 4441 4442 4443 4444

	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
		uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
		if (op_key == key) {
			op->aborted = true;
			count++;
		}
	}

4445 4446 4447
	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
		if (cmd_key == key) {
4448
			cmd->aborted = 1;
4449 4450 4451 4452 4453 4454 4455 4456
			count++;
		}
	}
	spin_unlock(&vha->cmd_list_lock);

	return count;
}

4457 4458 4459 4460 4461 4462
/*
 * 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)
{
4463
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4464
	struct qla_hw_data *ha = vha->hw;
4465
	struct fc_port *sess = NULL, *conflict_sess = NULL;
4466 4467 4468 4469
	uint64_t wwn;
	port_id_t port_id;
	uint16_t loop_id;
	uint16_t wd3_lo;
4470
	int res = 0;
4471
	struct qlt_plogi_ack_t *pla;
4472
	unsigned long flags;
4473

4474 4475 4476 4477 4478 4479 4480 4481 4482
	wwn = wwn_to_u64(iocb->u.isp24.port_name);

	port_id.b.domain = iocb->u.isp24.port_id[2];
	port_id.b.area   = iocb->u.isp24.port_id[1];
	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
	port_id.b.rsvd_1 = 0;

	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);

4483 4484 4485 4486 4487 4488
	ql_dbg(ql_dbg_disc, vha, 0xf026,
	    "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
	    vha->vp_idx, iocb->u.isp24.port_id[2],
		iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
		   iocb->u.isp24.status_subcode, loop_id,
		iocb->u.isp24.port_name);
4489

4490 4491 4492
	/* res = 1 means ack at the end of thread
	 * res = 0 means ack async/later.
	 */
4493 4494
	switch (iocb->u.isp24.status_subcode) {
	case ELS_PLOGI:
4495

4496 4497 4498
		/* Mark all stale commands in qla_tgt_wq for deletion */
		abort_cmds_for_s_id(vha, &port_id);

4499 4500
		if (wwn) {
			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4501 4502
			sess = qlt_find_sess_invalidate_other(vha, wwn,
				port_id, loop_id, &conflict_sess);
4503 4504
			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
		}
4505

4506
		if (IS_SW_RESV_ADDR(port_id)) {
4507 4508 4509 4510
			res = 1;
			break;
		}

4511 4512
		pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
		if (!pla) {
4513 4514 4515 4516 4517 4518
			qlt_send_term_imm_notif(vha, iocb, 1);
			break;
		}

		res = 0;

4519 4520
		if (conflict_sess) {
			conflict_sess->login_gen++;
4521
			qlt_plogi_ack_link(vha, pla, conflict_sess,
4522 4523
				QLT_PLOGI_LINK_CONFLICT);
		}
4524

4525 4526 4527 4528 4529
		if (!sess) {
			pla->ref_count++;
			qla24xx_post_newsess_work(vha, &port_id,
				iocb->u.isp24.port_name, pla);
			res = 0;
4530
			break;
4531
		}
4532 4533

		qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573
		sess->fw_login_state = DSC_LS_PLOGI_PEND;
		sess->d_id = port_id;
		sess->login_gen++;

		switch (sess->disc_state) {
		case DSC_DELETED:
			qlt_plogi_ack_unref(vha, pla);
			break;

		default:
			/*
			 * Under normal circumstances we want to release nport handle
			 * during LOGO process to avoid nport handle leaks inside FW.
			 * The exception is when LOGO is done while another PLOGI with
			 * the same nport handle is waiting as might be the case here.
			 * Note: there is always a possibily of a race where session
			 * deletion has already started for other reasons (e.g. ACL
			 * removal) and now PLOGI arrives:
			 * 1. if PLOGI arrived in FW after nport handle has been freed,
			 *    FW must have assigned this PLOGI a new/same handle and we
			 *    can proceed ACK'ing it as usual when session deletion
			 *    completes.
			 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
			 *    bit reached it, the handle has now been released. We'll
			 *    get an error when we ACK this PLOGI. Nothing will be sent
			 *    back to initiator. Initiator should eventually retry
			 *    PLOGI and situation will correct itself.
			 */
			sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
			   (sess->d_id.b24 == port_id.b24));

			ql_dbg(ql_dbg_disc, vha, 0xffff,
				   "%s %d %8phC post del sess\n",
				   __func__, __LINE__, sess->port_name);


			qlt_schedule_sess_for_deletion_lock(sess);
			break;
		}

4574 4575
		break;

4576
	case ELS_PRLI:
4577 4578
		wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);

4579 4580
		if (wwn) {
			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4581 4582
			sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
				loop_id, &conflict_sess);
4583 4584
			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
		}
4585 4586 4587 4588 4589 4590 4591 4592 4593

		if (conflict_sess) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
			    "PRLI with conflicting sess %p port %8phC\n",
			    conflict_sess, conflict_sess->port_name);
			qlt_send_term_imm_notif(vha, iocb, 1);
			res = 0;
			break;
		}
4594 4595

		if (sess != NULL) {
4596
			if (sess->fw_login_state == DSC_LS_PLOGI_PEND) {
4597 4598 4599 4600 4601
				/*
				 * Impatient initiator sent PRLI before last
				 * PLOGI could finish. Will force him to re-try,
				 * while last one finishes.
				 */
4602
				ql_log(ql_log_warn, sess->vha, 0xf095,
4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613
				    "sess %p PRLI received, before plogi ack.\n",
				    sess);
				qlt_send_term_imm_notif(vha, iocb, 1);
				res = 0;
				break;
			}

			/*
			 * This shouldn't happen under normal circumstances,
			 * since we have deleted the old session during PLOGI
			 */
4614
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4615 4616 4617 4618 4619
			    "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
			    sess->loop_id, sess, iocb->u.isp24.nport_handle);

			sess->local = 0;
			sess->loop_id = loop_id;
4620
			sess->d_id = port_id;
4621
			sess->fw_login_state = DSC_LS_PRLI_PEND;
4622 4623 4624 4625

			if (wd3_lo & BIT_7)
				sess->conf_compl_supported = 1;

4626 4627 4628 4629
			if ((wd3_lo & BIT_4) == 0)
				sess->port_type = FCT_INITIATOR;
			else
				sess->port_type = FCT_TARGET;
4630 4631 4632 4633 4634 4635 4636 4637
		}
		res = 1; /* send notify ack */

		/* Make session global (not used in fabric mode) */
		if (ha->current_topology != ISP_CFG_F) {
			set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
			set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
			qla2xxx_wake_dpc(vha);
4638
		} else {
4639 4640 4641 4642
			if (sess) {
				ql_dbg(ql_dbg_disc, vha, 0xffff,
					   "%s %d %8phC post nack\n",
					   __func__, __LINE__, sess->port_name);
4643

4644 4645 4646 4647 4648
				qla24xx_post_nack_work(vha, sess, iocb,
					SRB_NACK_PRLI);
				res = 0;
			}
		}
4649 4650
		break;

4651 4652 4653 4654 4655 4656 4657 4658 4659 4660

	case ELS_TPRLO:
		if (le16_to_cpu(iocb->u.isp24.flags) &
			NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
			loop_id = 0xFFFF;
			qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
			res = 1;
			break;
		}
		/* drop through */
4661 4662
	case ELS_LOGO:
	case ELS_PRLO:
4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
		sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

		if (sess) {
			sess->login_gen++;
			sess->fw_login_state = DSC_LS_LOGO_PEND;
			sess->logo_ack_needed = 1;
			memcpy(sess->iocb, iocb, IOCB_SIZE);
		}

4674
		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4675 4676 4677 4678 4679

		ql_dbg(ql_dbg_disc, vha, 0xffff,
		    "%s: logo %llx res %d sess %p ",
		    __func__, wwn, res, sess);
		if (res == 0) {
4680 4681 4682 4683
			/*
			 * cmd went upper layer, look for qlt_xmit_tm_rsp()
			 * for LOGO_ACK & sess delete
			 */
4684 4685 4686
			BUG_ON(!sess);
			res = 0;
		} else {
4687
			/* cmd did not go to upper layer. */
4688 4689 4690 4691 4692 4693
			if (sess) {
				qlt_schedule_sess_for_deletion_lock(sess);
				res = 0;
			}
			/* else logo will be ack */
		}
4694 4695 4696 4697
		break;
	case ELS_PDISC:
	case ELS_ADISC:
	{
4698
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4699 4700 4701 4702 4703
		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;
		}
4704 4705 4706 4707 4708 4709 4710 4711 4712 4713

		sess = qla2x00_find_fcport_by_wwpn(vha,
		    iocb->u.isp24.port_name, 1);
		if (sess) {
			ql_dbg(ql_dbg_disc, vha, 0xffff,
				"sess %p lid %d|%d DS %d LS %d\n",
				sess, sess->loop_id, loop_id,
				sess->disc_state, sess->fw_login_state);
		}

4714 4715 4716 4717
		res = 1; /* send notify ack */
		break;
	}

4718
	case ELS_FLOGI:	/* should never happen */
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
	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;
}

/*
 * 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:
	{
4757
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
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 4817 4818 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 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865
		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;
	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.
 */
4866
static int __qlt_send_busy(struct scsi_qla_host *vha,
4867 4868 4869 4870 4871
	struct atio_from_isp *atio, uint16_t status)
{
	struct ctio7_to_24xx *ctio24;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
4872
	struct fc_port *sess = NULL;
4873
	unsigned long flags;
4874

4875
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4876 4877
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    atio->u.isp24.fcp_hdr.s_id);
4878
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4879
	if (!sess) {
4880
		qlt_send_term_exchange(vha, NULL, atio, 1, 0);
4881
		return 0;
4882 4883 4884 4885 4886
	}
	/* Sending marker isn't necessary, since we called from ISR */

	pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
	if (!pkt) {
4887
		ql_dbg(ql_dbg_io, vha, 0x3063,
4888 4889
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet", vha->vp_idx, __func__);
4890
		return -ENOMEM;
4891 4892
	}

4893
	vha->tgt_counters.num_q_full_sent++;
4894 4895 4896 4897 4898 4899
	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;
4900
	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
4901 4902 4903 4904 4905 4906
	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) |
4907
	    cpu_to_le16(
4908 4909 4910 4911 4912 4913 4914 4915
		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);
4916 4917
	/* Memory Barrier */
	wmb();
4918
	qla2x00_start_iocbs(vha, vha->req);
4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932
	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;
4933
	struct fc_port *sess;
4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946
	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 >
4947 4948
			vha->qla_stats.stat_max_qfull_cmds_dropped)
			vha->qla_stats.stat_max_qfull_cmds_dropped =
4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978
				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 >
4979 4980
			vha->qla_stats.stat_max_qfull_cmds_dropped)
			vha->qla_stats.stat_max_qfull_cmds_dropped =
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
				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 >
5009 5010
		vha->qla_stats.stat_max_qfull_cmds_alloc)
		vha->qla_stats.stat_max_qfull_cmds_alloc =
5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 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 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090
			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,
5091
	struct atio_from_isp *atio, bool ha_locked)
5092 5093 5094
{
	struct qla_hw_data *ha = vha->hw;
	uint16_t status;
5095
	unsigned long flags;
5096 5097 5098 5099

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

5100 5101
	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);
5102 5103
	status = temp_sam_status;
	qlt_send_busy(vha, atio, status);
5104 5105 5106
	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

5107
	return 1;
5108 5109 5110 5111 5112
}

/* 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,
5113
	struct atio_from_isp *atio, uint8_t ha_locked)
5114 5115
{
	struct qla_hw_data *ha = vha->hw;
5116
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5117
	int rc;
5118
	unsigned long flags;
5119 5120

	if (unlikely(tgt == NULL)) {
5121
		ql_dbg(ql_dbg_io, vha, 0x3064,
5122 5123 5124 5125 5126 5127 5128 5129
		    "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.
	 */

5130
	tgt->atio_irq_cmd_count++;
5131 5132 5133 5134 5135

	switch (atio->u.raw.entry_type) {
	case ATIO_TYPE7:
		if (unlikely(atio->u.isp24.exchange_addr ==
		    ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5136
			ql_dbg(ql_dbg_io, vha, 0x3065,
5137 5138 5139
			    "qla_target(%d): ATIO_TYPE7 "
			    "received with UNKNOWN exchange address, "
			    "sending QUEUE_FULL\n", vha->vp_idx);
5140 5141
			if (!ha_locked)
				spin_lock_irqsave(&ha->hardware_lock, flags);
5142
			qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5143 5144
			if (!ha_locked)
				spin_unlock_irqrestore(&ha->hardware_lock, flags);
5145 5146
			break;
		}
5147 5148 5149 5150



		if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5151
			rc = qlt_chk_qfull_thresh_hold(vha, atio, ha_locked);
5152
			if (rc != 0) {
5153
				tgt->atio_irq_cmd_count--;
5154 5155
				return;
			}
5156
			rc = qlt_handle_cmd_for_atio(vha, atio);
5157
		} else {
5158
			rc = qlt_handle_task_mgmt(vha, atio);
5159
		}
5160 5161
		if (unlikely(rc != 0)) {
			if (rc == -ESRCH) {
5162 5163 5164 5165
				if (!ha_locked)
					spin_lock_irqsave
						(&ha->hardware_lock, flags);

5166 5167 5168
#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
				qlt_send_busy(vha, atio, SAM_STAT_BUSY);
#else
5169
				qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5170
#endif
5171 5172 5173 5174 5175

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

5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186
			} 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);
5187 5188 5189
					if (!ha_locked)
						spin_lock_irqsave(
						    &ha->hardware_lock, flags);
5190
					qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5191 5192 5193
					if (!ha_locked)
						spin_unlock_irqrestore(
						    &ha->hardware_lock, flags);
5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209
				}
			}
		}
		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");
5210 5211 5212

		if (!ha_locked)
			spin_lock_irqsave(&ha->hardware_lock, flags);
5213
		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5214 5215
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
5216 5217 5218 5219 5220 5221 5222 5223 5224 5225
		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;
	}

5226
	tgt->atio_irq_cmd_count--;
5227 5228 5229 5230 5231 5232 5233
}

/* 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;
5234
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250

	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) {
5251
	case CTIO_CRC2:
5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265
	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 !=
5266
		    cpu_to_le16(ATIO_CDB_VALID)) {
5267 5268 5269 5270 5271 5272 5273
			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;
		}

5274
		rc = qlt_chk_qfull_thresh_hold(vha, atio, true);
5275 5276 5277 5278 5279
		if (rc != 0) {
			tgt->irq_cmd_count--;
			return;
		}

5280 5281 5282 5283 5284 5285
		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
5286
				qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5287 5288 5289 5290 5291 5292 5293 5294
#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,
5295
					    atio, 1, 0);
5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339
				} 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 !=
5340
			    cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 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 5396 5397 5398 5399 5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418 5419
				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;
5420
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5421
	int login_code;
5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448

	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 "
5449
		    "occurred", vha->vp_idx, code);
5450 5451 5452 5453 5454 5455 5456 5457
		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,
5458
		    "qla_target(%d): Async LOOP_UP occurred "
5459 5460 5461
		    "(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]));
5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474
		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,
5475
		    "qla_target(%d): Async event %#x occurred "
5476 5477 5478
		    "(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]));
5479 5480
		break;

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
	case MBA_REJECTED_FCP_CMD:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
			"qla_target(%d): Async event LS_REJECT occurred "
			"(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]));

		if (le16_to_cpu(mailbox[3]) == 1) {
			/* exchange starvation. */
			vha->hw->exch_starvation++;
			if (vha->hw->exch_starvation > 5) {
				ql_log(ql_log_warn, vha, 0xffff,
				    "Exchange starvation-. Resetting RISC\n");

				vha->hw->exch_starvation = 0;
				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);
			}
		}
		break;

5507 5508 5509
	case MBA_PORT_UPDATE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
		    "qla_target(%d): Port update async event %#x "
5510
		    "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5511 5512 5513 5514 5515
		    "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]);
5516
		if (login_code == 0x4) {
5517 5518
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
			    "Async MB 2: Got PLOGI Complete\n");
5519 5520
			vha->hw->exch_starvation = 0;
		} else if (login_code == 0x7)
5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533
			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)
{
5534
	fc_port_t *fcport, *tfcp, *del;
5535
	int rc;
5536 5537
	unsigned long flags;
	u8 newfcport = 0;
5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558

	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;
	}

5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578 5579 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
	del = NULL;
	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
	tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);

	if (tfcp) {
		tfcp->d_id = fcport->d_id;
		tfcp->port_type = fcport->port_type;
		tfcp->supported_classes = fcport->supported_classes;
		tfcp->flags |= fcport->flags;

		del = fcport;
		fcport = tfcp;
	} else {
		if (vha->hw->current_topology == ISP_CFG_F)
			fcport->flags |= FCF_FABRIC_DEVICE;

		list_add_tail(&fcport->list, &vha->vp_fcports);
		if (!IS_SW_RESV_ADDR(fcport->d_id))
		   vha->fcport_count++;
		fcport->login_gen++;
		fcport->disc_state = DSC_LOGIN_COMPLETE;
		fcport->login_succ = 1;
		newfcport = 1;
	}

	fcport->deleted = 0;
	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);

	switch (vha->host->active_mode) {
	case MODE_INITIATOR:
	case MODE_DUAL:
		if (newfcport) {
			if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
				ql_dbg(ql_dbg_disc, vha, 0xffff,
				   "%s %d %8phC post upd_fcport fcp_cnt %d\n",
				   __func__, __LINE__, fcport->port_name, vha->fcport_count);
				qla24xx_post_upd_fcport_work(vha, fcport);
			} else {
				ql_dbg(ql_dbg_disc, vha, 0xffff,
				   "%s %d %8phC post gpsc fcp_cnt %d\n",
				   __func__, __LINE__, fcport->port_name, vha->fcport_count);
				qla24xx_post_gpsc_work(vha, fcport);
			}
		}
		break;

	case MODE_TARGET:
	default:
		break;
	}
	if (del)
		qla2x00_free_fcport(del);

5612 5613 5614 5615
	return fcport;
}

/* Must be called under tgt_mutex */
5616
static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5617 5618
	uint8_t *s_id)
{
5619
	struct fc_port *sess = NULL;
5620 5621 5622 5623
	fc_port_t *fcport = NULL;
	int rc, global_resets;
	uint16_t loop_id = 0;

5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634
	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]);
		return NULL;
	}

5635 5636
	mutex_lock(&vha->vha_tgt.tgt_mutex);

5637
retry:
5638 5639
	global_resets =
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5640 5641 5642

	rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
	if (rc != 0) {
5643 5644
		mutex_unlock(&vha->vha_tgt.tgt_mutex);

5645 5646 5647 5648 5649
		ql_log(ql_log_info, 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]);
5650 5651 5652 5653 5654 5655 5656 5657

		if (rc == -ENOENT) {
			qlt_port_logo_t logo;
			sid_to_portid(s_id, &logo.id);
			logo.cmd_count = 1;
			qlt_send_first_logo(vha, &logo);
		}

5658 5659 5660 5661
		return NULL;
	}

	fcport = qlt_get_port_database(vha, loop_id);
5662 5663
	if (!fcport) {
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
5664
		return NULL;
5665
	}
5666 5667

	if (global_resets !=
5668
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5669 5670 5671 5672
		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,
5673 5674
		    atomic_read(&vha->vha_tgt.
			qla_tgt->tgt_global_resets_count));
5675 5676 5677 5678 5679
		goto retry;
	}

	sess = qlt_create_sess(vha, fcport, true);

5680 5681
	mutex_unlock(&vha->vha_tgt.tgt_mutex);

5682 5683 5684 5685 5686 5687 5688 5689
	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;
5690
	struct fc_port *sess = NULL;
5691
	unsigned long flags = 0, flags2 = 0;
5692 5693 5694 5695
	uint32_t be_s_id;
	uint8_t s_id[3];
	int rc;

5696
	spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5697 5698

	if (tgt->tgt_stop)
5699
		goto out_term2;
5700 5701 5702 5703 5704 5705 5706 5707

	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) {
5708
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5709 5710 5711 5712

		sess = qlt_make_local_sess(vha, s_id);
		/* sess has got an extra creation ref */

5713
		spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5714
		if (!sess)
5715
			goto out_term2;
5716
	} else {
5717
		if (sess->deleted) {
5718
			sess = NULL;
5719
			goto out_term2;
5720 5721
		}

5722 5723 5724 5725 5726 5727 5728
		if (!kref_get_unless_zero(&sess->sess_kref)) {
			ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
			    "%s: kref_get fail %8phC \n",
			     __func__, sess->port_name);
			sess = NULL;
			goto out_term2;
		}
5729 5730 5731
	}

	rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5732 5733 5734
	ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);

5735 5736 5737 5738
	if (rc != 0)
		goto out_term;
	return;

5739
out_term2:
5740 5741 5742
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5743

5744
out_term:
5745
	spin_lock_irqsave(&ha->hardware_lock, flags);
5746
	qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5747
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
5748 5749 5750 5751 5752 5753 5754 5755
}

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;
5756
	struct fc_port *sess = NULL;
5757 5758 5759 5760
	unsigned long flags;
	uint8_t *s_id = NULL; /* to hide compiler warnings */
	int rc;
	uint32_t lun, unpacked_lun;
5761
	int fn;
5762 5763
	void *iocb;

5764
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5765 5766

	if (tgt->tgt_stop)
5767
		goto out_term2;
5768 5769 5770 5771

	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) {
5772
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5773 5774 5775 5776

		sess = qlt_make_local_sess(vha, s_id);
		/* sess has got an extra creation ref */

5777
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5778
		if (!sess)
5779
			goto out_term2;
5780
	} else {
5781
		if (sess->deleted) {
5782
			sess = NULL;
5783
			goto out_term2;
5784 5785
		}

5786 5787 5788 5789 5790
		if (!kref_get_unless_zero(&sess->sess_kref)) {
			ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
			    "%s: kref_get fail %8phC\n",
			     __func__, sess->port_name);
			sess = NULL;
5791
			goto out_term2;
5792
		}
5793 5794 5795 5796 5797 5798 5799 5800
	}

	iocb = a;
	lun = a->u.isp24.fcp_cmnd.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);
5801
	ha->tgt.tgt_ops->put_sess(sess);
5802
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5803 5804 5805

	if (rc != 0)
		goto out_term;
5806 5807
	return;

5808 5809 5810 5811
out_term2:
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5812
out_term:
5813
	qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
5814 5815 5816 5817 5818 5819 5820 5821 5822 5823 5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854 5855 5856 5857 5858 5859 5860 5861 5862 5863 5864
}

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;

5865 5866 5867 5868 5869 5870
	if (!IS_TGT_MODE_CAPABLE(ha)) {
		ql_log(ql_log_warn, base_vha, 0xe070,
		    "This adapter does not support target mode.\n");
		return 0;
	}

5871
	ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5872
	    "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5873

5874
	BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5875 5876 5877 5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894

	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->del_sess_list);
	spin_lock_init(&tgt->sess_work_lock);
	INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
	INIT_LIST_HEAD(&tgt->sess_works_list);
	atomic_set(&tgt->tgt_global_resets_count, 0);

5895
	base_vha->vha_tgt.qla_tgt = tgt;
5896 5897 5898 5899 5900 5901 5902 5903 5904 5905

	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;

5906 5907 5908
	if (base_vha->fc_vport)
		return 0;

5909 5910 5911 5912 5913 5914 5915 5916 5917 5918
	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)
{
5919
	if (!vha->vha_tgt.qla_tgt)
5920 5921
		return 0;

5922 5923 5924 5925
	if (vha->fc_vport) {
		qlt_release(vha->vha_tgt.qla_tgt);
		return 0;
	}
5926 5927 5928 5929

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

5930
	mutex_lock(&qla_tgt_mutex);
5931
	list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5932 5933 5934 5935
	mutex_unlock(&qla_tgt_mutex);

	ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
	    vha->host_no, ha);
5936
	qlt_release(vha->vha_tgt.qla_tgt);
5937 5938 5939 5940 5941 5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958 5959 5960 5961 5962 5963 5964 5965 5966 5967 5968 5969

	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
 */
5970 5971 5972
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))
5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989 5990 5991 5992 5993 5994
{
	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);
5995
		if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5996 5997 5998 5999 6000
			pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
			    host->host_no);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			continue;
		}
6001 6002 6003 6004 6005 6006
		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;
		}
6007 6008 6009 6010 6011 6012 6013 6014
		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;
		}
6015
		qlt_lport_dump(vha, phys_wwpn, b);
6016 6017 6018 6019 6020

		if (memcmp(vha->port_name, b, WWN_SIZE)) {
			scsi_host_put(host);
			continue;
		}
6021 6022 6023 6024
		rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
		if (rc != 0)
			scsi_host_put(host);

6025
		mutex_unlock(&qla_tgt_mutex);
6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044 6045
		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
	 */
6046
	vha->vha_tgt.target_lport_ptr = NULL;
6047 6048 6049 6050 6051 6052 6053 6054 6055
	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 */
6056
static void qlt_set_mode(struct scsi_qla_host *vha)
6057 6058 6059 6060 6061 6062 6063
{
	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:
6064 6065 6066 6067
		vha->host->active_mode = MODE_UNKNOWN;
		break;
	case QLA2XXX_INI_MODE_DUAL:
		vha->host->active_mode = MODE_DUAL;
6068 6069 6070 6071 6072 6073 6074
		break;
	default:
		break;
	}
}

/* Must be called under HW lock */
6075
static void qlt_clear_mode(struct scsi_qla_host *vha)
6076 6077 6078 6079 6080 6081 6082 6083 6084
{
	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:
6085 6086
	case QLA2XXX_INI_MODE_DUAL:
		vha->host->active_mode = MODE_INITIATOR;
6087 6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101
		break;
	default:
		break;
	}
}

/*
 * 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;
6102
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6103
	unsigned long flags;
6104
	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6105
	int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6106 6107 6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119

	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);

6120 6121 6122 6123
	if (vha->vp_idx) {
		qla24xx_disable_vp(vha);
		qla24xx_enable_vp(vha);
	} else {
6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134
		if (ha->msix_entries) {
			ql_dbg(ql_dbg_tgt, vha, 0xffff,
			    "%s: host%ld : vector %d cpu %d\n",
			    __func__, vha->host_no,
			    ha->msix_entries[rspq_ent].vector,
			    ha->msix_entries[rspq_ent].cpuid);

			ha->tgt.rspq_vector_cpuid =
			    ha->msix_entries[rspq_ent].cpuid;
		}

6135 6136 6137 6138
		set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
		qla2xxx_wake_dpc(base_vha);
		qla2x00_wait_for_hba_online(base_vha);
	}
6139 6140 6141 6142 6143 6144 6145 6146
}
EXPORT_SYMBOL(qlt_enable_vha);

/*
 * qla_tgt_disable_vha - NO LOCK HELD
 *
 * Disable Target Mode and reset the adapter
 */
6147
static void qlt_disable_vha(struct scsi_qla_host *vha)
6148 6149
{
	struct qla_hw_data *ha = vha->hw;
6150
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6151 6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177
	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)
{
6178 6179 6180 6181
	vha->vha_tgt.qla_tgt = NULL;

	mutex_init(&vha->vha_tgt.tgt_mutex);
	mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6182 6183 6184 6185 6186 6187 6188 6189 6190 6191

	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;
6192 6193

	qlt_add_target(ha, vha);
6194 6195 6196 6197 6198 6199 6200 6201 6202
}

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)) {
6203
		ct_req->req.rff_id.fc4_feature = BIT_0;
6204 6205
	} else if (qla_ini_mode_enabled(vha)) {
		ct_req->req.rff_id.fc4_feature = BIT_1;
6206 6207
	} else if (qla_dual_mode_enabled(vha))
		ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225
}

/*
 * 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;

6226
	if (qla_ini_mode_enabled(vha))
6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240
		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
6241
qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6242 6243 6244 6245 6246 6247 6248 6249
{
	struct qla_hw_data *ha = vha->hw;
	struct atio_from_isp *pkt;
	int cnt, i;

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

6250 6251
	while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
	    fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6252 6253 6254
		pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
		cnt = pkt->u.raw.entry_count;

6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272
		if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
			/*
			 * This packet is corrupted. The header + payload
			 * can not be trusted. There is no point in passing
			 * it further up.
			 */
			ql_log(ql_log_warn, vha, 0xffff,
			    "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
			    pkt->u.isp24.fcp_hdr.s_id,
			    be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
			    le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);

			adjust_corrupted_atio(pkt);
			qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0);
		} else {
			qlt_24xx_atio_pkt_all_vps(vha,
			    (struct atio_from_isp *)pkt, ha_locked);
		}
6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285 6286 6287 6288

		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 */
6289
	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6290
	RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6291 6292 6293
}

void
6294
qlt_24xx_config_rings(struct scsi_qla_host *vha)
6295 6296
{
	struct qla_hw_data *ha = vha->hw;
6297 6298
	if (!QLA_TGT_MODE_ENABLED())
		return;
6299

6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311
	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);
6312 6313 6314 6315 6316 6317 6318
	}
}

void
qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
{
	struct qla_hw_data *ha = vha->hw;
6319 6320
	u32 tmp;
	u16 t;
6321

6322
	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334
		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;
		}

6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352
		if (qla_tgt_mode_enabled(vha)) {
			nv->exchange_count = cpu_to_le16(0xFFFF);
		} else {			/* dual */
			if (ql_dm_tgt_ex_pct > 100) {
				ql_dm_tgt_ex_pct = 50;
			} else if (ql_dm_tgt_ex_pct == 100) {
				/* leave some for FW */
				ql_dm_tgt_ex_pct = 95;
			}

			tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
			tmp = tmp/100;
			if (tmp > 0xffff)
				tmp = 0xffff;

			t = tmp & 0xffff;
			nv->exchange_count = cpu_to_le16(t);
		}
6353 6354

		/* Enable target mode */
6355
		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6356 6357

		/* Disable ini mode, if requested */
6358
		if (qla_tgt_mode_enabled(vha))
6359
			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6360 6361

		/* Disable Full Login after LIP */
6362
		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6363
		/* Enable initial LIP */
6364
		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6365 6366 6367 6368 6369 6370 6371
		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);

6372
		/* Disable Full Login after LIP */
6373
		nv->host_p &= cpu_to_le32(~BIT_10);
6374 6375 6376 6377 6378 6379 6380

		/*
		 * clear BIT 15 explicitly as we have seen at least
		 * a couple of instances where this was set and this
		 * was causing the firmware to not be initialized.
		 */
		nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6381
		/* Enable target PRLI control */
6382
		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399 6400
	} 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;
	}

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

6401
		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6402 6403 6404 6405
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

6406
		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6407 6408 6409 6410 6411 6412 6413 6414 6415
	}
}

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

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6416 6417 6418
	if (!QLA_TGT_MODE_ENABLED())
		return;

6419 6420
	if (ha->tgt.node_name_set) {
		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6421
		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6422
	}
Q
Quinn Tran 已提交
6423 6424 6425 6426 6427 6428 6429 6430

	/* disable ZIO at start time. */
	if (!vha->flags.init_done) {
		uint32_t tmp;
		tmp = le32_to_cpu(icb->firmware_options_2);
		tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
		icb->firmware_options_2 = cpu_to_le32(tmp);
	}
6431 6432
}

6433 6434 6435 6436
void
qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
{
	struct qla_hw_data *ha = vha->hw;
6437 6438
	u32 tmp;
	u16 t;
6439 6440 6441 6442

	if (!QLA_TGT_MODE_ENABLED())
		return;

6443
	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455
		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;
		}

6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471 6472
		if (qla_tgt_mode_enabled(vha)) {
			nv->exchange_count = cpu_to_le16(0xFFFF);
		} else {			/* dual */
			if (ql_dm_tgt_ex_pct > 100) {
				ql_dm_tgt_ex_pct = 50;
			} else if (ql_dm_tgt_ex_pct == 100) {
				/* leave some for FW */
				ql_dm_tgt_ex_pct = 95;
			}

			tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
			tmp = tmp/100;
			if (tmp > 0xffff)
				tmp = 0xffff;
			t = tmp & 0xffff;
			nv->exchange_count = cpu_to_le16(t);
		}
6473 6474

		/* Enable target mode */
6475
		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6476 6477

		/* Disable ini mode, if requested */
6478
		if (qla_tgt_mode_enabled(vha))
6479
			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6480
		/* Disable Full Login after LIP */
6481
		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6482
		/* Enable initial LIP */
6483
		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6484 6485 6486 6487 6488 6489 6490
		/*
		 * clear BIT 15 explicitly as we have seen at
		 * least a couple of instances where this was set
		 * and this was causing the firmware to not be
		 * initialized.
		 */
		nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6491 6492 6493 6494 6495 6496 6497
		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);

6498
		/* Disable Full Login after LIP */
6499
		nv->host_p &= cpu_to_le32(~BIT_10);
6500
		/* Enable target PRLI control */
6501
		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519
	} 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;
	}

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

6520
		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6521 6522 6523 6524
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

6525
		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6526 6527 6528 6529 6530 6531 6532 6533 6534 6535 6536 6537 6538 6539
	}
}

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);
6540
		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6541
	}
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6542 6543 6544 6545 6546 6547 6548 6549 6550

	/* disable ZIO at start time. */
	if (!vha->flags.init_done) {
		uint32_t tmp;
		tmp = le32_to_cpu(icb->firmware_options_2);
		tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
		icb->firmware_options_2 = cpu_to_le32(tmp);
	}

6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561
}

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

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

6562 6563 6564 6565 6566 6567 6568 6569 6570
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:
6571
	case CTIO_CRC2:
6572 6573 6574 6575 6576 6577 6578 6579 6580 6581
		return 1;
	default:
		return 0;
	}
}

void
qlt_modify_vp_config(struct scsi_qla_host *vha,
	struct vp_config_entry_24xx *vpmod)
{
6582 6583
	/* enable target mode.  Bit5 = 1 => disable */
	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6584
		vpmod->options_idx1 &= ~BIT_5;
6585

6586
	/* Disable ini mode, if requested.  bit4 = 1 => disable */
6587
	if (qla_tgt_mode_enabled(vha))
6588 6589 6590 6591 6592 6593 6594 6595 6596
		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;

6597
	if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6598 6599 6600 6601 6602 6603 6604
		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;
	}

6605 6606
	mutex_init(&base_vha->vha_tgt.tgt_mutex);
	mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6607 6608 6609 6610 6611

	INIT_LIST_HEAD(&base_vha->unknown_atio_list);
	INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
	    qlt_unknown_atio_work_fn);

6612 6613 6614
	qlt_clear_mode(base_vha);
}

6615 6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626
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);

6627
	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6628

6629
	qlt_24xx_process_atio_queue(vha, 0);
6630

6631
	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6632 6633 6634 6635

	return IRQ_HANDLED;
}

6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649 6650 6651 6652 6653 6654
static void
qlt_handle_abts_recv_work(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;
	unsigned long flags;

	if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset))
		return;

	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
	qlt_24xx_process_atio_queue(vha, 0);
	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);

	spin_lock_irqsave(&ha->hardware_lock, flags);
	qlt_response_pkt_all_vps(vha, (response_t *)&op->atio);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6655 6656

	kfree(op);
6657 6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681
}

void
qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt)
{
	struct qla_tgt_sess_op *op;

	op = kzalloc(sizeof(*op), GFP_ATOMIC);

	if (!op) {
		/* do not reach for ATIO queue here.  This is best effort err
		 * recovery at this point.
		 */
		qlt_response_pkt_all_vps(vha, pkt);
		return;
	}

	memcpy(&op->atio, pkt, sizeof(*pkt));
	op->vha = vha;
	op->chip_reset = vha->hw->chip_reset;
	INIT_WORK(&op->work, qlt_handle_abts_recv_work);
	queue_work(qla_tgt_wq, &op->work);
	return;
}

6682 6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747
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;
6748 6749
	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
		ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774
	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");
6775
		return -ENOMEM;
6776 6777
	}

6778
	qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
6779 6780
	    sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
	    0, NULL);
6781 6782 6783 6784 6785 6786 6787 6788

	if (!qla_tgt_plogi_cachep) {
		ql_log(ql_log_fatal, NULL, 0xe06d,
		    "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
		ret = -ENOMEM;
		goto out_mgmt_cmd_cachep;
	}

6789 6790 6791 6792 6793 6794
	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;
6795
		goto out_plogi_cachep;
6796 6797 6798 6799 6800 6801 6802 6803 6804 6805 6806 6807 6808 6809 6810 6811
	}

	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);
6812 6813
out_plogi_cachep:
	kmem_cache_destroy(qla_tgt_plogi_cachep);
6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824 6825
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);
6826
	kmem_cache_destroy(qla_tgt_plogi_cachep);
6827 6828
	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
}