qla_target.c 190.4 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 = 0;
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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 ql2xuctrlirq = 1;
module_param(ql2xuctrlirq, int, 0644);
MODULE_PARM_DESC(ql2xuctrlirq,
    "User to control IRQ placement via smp_affinity."
    "Valid with qlini_mode=disabled."
    "1(default): enable");

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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, struct rsp_que *rsp,
	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);
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static void qlt_send_term_exchange(struct qla_qpair *, 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_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 qla_qpair *qpair,
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	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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static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
    uint16_t);
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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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static const char *prot_op_str(u32 prot_op)
{
	switch (prot_op) {
	case TARGET_PROT_NORMAL:	return "NORMAL";
	case TARGET_PROT_DIN_INSERT:	return "DIN_INSERT";
	case TARGET_PROT_DOUT_INSERT:	return "DOUT_INSERT";
	case TARGET_PROT_DIN_STRIP:	return "DIN_STRIP";
	case TARGET_PROT_DOUT_STRIP:	return "DOUT_STRIP";
	case TARGET_PROT_DIN_PASS:	return "DIN_PASS";
	case TARGET_PROT_DOUT_PASS:	return "DOUT_PASS";
	default:			return "UNKNOWN";
	}
}

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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)
{
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	struct scsi_qla_host *host;
	uint32_t key = 0;
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	if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
	    (vha->d_id.b.al_pa == d_id[2]))
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		return vha;

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	key  = (uint32_t)d_id[0] << 16;
	key |= (uint32_t)d_id[1] <<  8;
	key |= (uint32_t)d_id[2];
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	host = btree_lookup32(&vha->hw->tgt.host_map, key);
	if (!host)
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		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
		    "Unable to find host %06x\n", key);
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	return host;
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}

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,
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	struct atio_from_isp *atio, uint8_t ha_locked)
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{
	struct qla_tgt_sess_op *u;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	unsigned long flags;

	if (tgt->tgt_stop) {
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		ql_dbg(ql_dbg_async, vha, 0x502c,
		    "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
		    vha->vp_idx);
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		goto out_term;
	}

	u = kzalloc(sizeof(*u), GFP_ATOMIC);
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	if (u == NULL)
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		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:
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	qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
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	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) {
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			ql_dbg(ql_dbg_async, vha, 0x502e,
			    "Freeing unknown %s %p, because of Abort\n",
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			    "ATIO_TYPE7", u);
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			qlt_send_term_exchange(vha->hw->base_qpair, NULL,
			    &u->atio, ha_locked, 0);
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			goto abort;
		}

		host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
		if (host != NULL) {
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			ql_dbg(ql_dbg_async, vha, 0x502f,
			    "Requeuing unknown ATIO_TYPE7 %p\n", u);
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			qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
		} else if (tgt->tgt_stop) {
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			ql_dbg(ql_dbg_async, vha, 0x503a,
			    "Freeing unknown %s %p, because tgt is being stopped\n",
			    "ATIO_TYPE7", u);
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			qlt_send_term_exchange(vha->hw->base_qpair, NULL,
			    &u->atio, ha_locked, 0);
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		} else {
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			ql_dbg(ql_dbg_async, vha, 0x503d,
			    "Reschedule u %p, vha %p, host %p\n", u, vha, host);
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			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;

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		qlt_issue_marker(vha, ha_locked);

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		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)) {
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			ql_dbg(ql_dbg_tgt, vha, 0xe00a,
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			    "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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}

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void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
	struct rsp_que *rsp, response_t *pkt)
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{
	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;
		}
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		qlt_response_pkt(host, rsp, pkt);
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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 *)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;
		}
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		qlt_response_pkt(host, rsp, pkt);
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		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;
			}
		}
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		qlt_response_pkt(host, rsp, pkt);
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		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;
		}
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		qlt_response_pkt(host, rsp, pkt);
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		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;
		}
539
		qlt_response_pkt(host, rsp, pkt);
540 541 542 543
		break;
	}

	default:
544
		qlt_response_pkt(vha, rsp, pkt);
545 546 547 548 549
		break;
	}

}

550 551 552
/*
 * All qlt_plogi_ack_t operations are protected by hardware_lock
 */
553 554 555 556 557 558 559 560 561 562 563 564 565 566 567
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
568
void qla2x00_async_nack_sp_done(void *s, int res)
569 570
{
	struct srb *sp = (struct srb *)s;
571
	struct scsi_qla_host *vha = sp->vha;
572 573
	unsigned long flags;

574 575 576
	ql_dbg(ql_dbg_disc, vha, 0x20f2,
	    "Async done-%s res %x %8phC  type %d\n",
	    sp->name, res, sp->fcport->port_name, sp->type);
577 578 579

	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
	sp->fcport->flags &= ~FCF_ASYNC_SENT;
580
	sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
581 582 583 584 585 586

	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;
587
		sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
588 589 590 591 592 593 594 595 596 597 598 599 600 601
		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) {
602 603 604 605 606
				ql_dbg(ql_dbg_disc, vha, 0x20f3,
				    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
				    __func__, __LINE__,
				    sp->fcport->port_name,
				    vha->fcport_count);
607 608 609

				qla24xx_post_upd_fcport_work(vha, sp->fcport);
			} else {
610 611 612 613 614
				ql_dbg(ql_dbg_disc, vha, 0x20f5,
				    "%s %d %8phC post gpsc fcp_cnt %d\n",
				    __func__, __LINE__,
				    sp->fcport->port_name,
				    vha->fcport_count);
615 616 617 618 619 620 621 622 623 624 625 626 627 628

				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);

629
	sp->free(sp);
630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646
}

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;
647
		fcport->deleted = 0;
648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672
		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;

673 674 675
	ql_dbg(ql_dbg_disc, vha, 0x20f4,
	    "Async-%s %8phC hndl %x %s\n",
	    sp->name, fcport->port_name, sp->handle, c);
676 677 678 679

	return rval;

done_free_sp:
680
	sp->free(sp);
681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696
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) {
697
			ql_log(ql_log_info, vha, 0xd034,
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
			    "%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)) {
766
			ql_dbg(ql_dbg_disc, vha, 0x2107,
767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
			    "%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);
}
796 797 798 799 800 801

/*
 * 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
 */
802
static struct qlt_plogi_ack_t *
803 804 805
qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
		       struct imm_ntfy_from_isp *iocb)
{
806
	struct qlt_plogi_ack_t *pla;
807 808 809 810

	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);
811
			memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
812 813 814 815 816 817 818 819 820 821 822 823
			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;
	}

824
	memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
825 826 827 828 829 830
	pla->id = *id;
	list_add_tail(&pla->list, &vha->plogi_ack_list);

	return pla;
}

831
void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
832
    struct qlt_plogi_ack_t *pla)
833
{
834
	struct imm_ntfy_from_isp *iocb = &pla->iocb;
835 836 837 838
	port_id_t port_id;
	uint16_t loop_id;
	fc_port_t *fcport = pla->fcport;

839 840 841 842 843 844
	BUG_ON(!pla->ref_count);
	pla->ref_count--;

	if (pla->ref_count)
		return;

845
	ql_dbg(ql_dbg_disc, vha, 0x5089,
846
	    "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
847 848 849 850 851
	    " 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);
852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869

	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;
	}
870 871 872 873 874

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

875
void
876 877
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)
878
{
879
	struct imm_ntfy_from_isp *iocb = &pla->iocb;
880 881 882
	/* Inc ref_count first because link might already be pointing at pla */
	pla->ref_count++;

883 884 885 886 887 888 889 890
	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);

891 892 893
	if (sess->plogi_link[link])
		qlt_plogi_ack_unref(vha, sess->plogi_link[link]);

894 895
	if (link == QLT_PLOGI_LINK_SAME_WWN)
		pla->fcport = sess;
896 897 898 899

	sess->plogi_link[link] = pla;
}

900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939
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);

940 941 942 943
	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);
944 945
}

946 947
static void qlt_free_session_done(struct work_struct *work)
{
948
	struct fc_port *sess = container_of(work, struct fc_port,
949 950 951 952
	    free_work);
	struct qla_tgt *tgt = sess->tgt;
	struct scsi_qla_host *vha = sess->vha;
	struct qla_hw_data *ha = vha->hw;
953 954
	unsigned long flags;
	bool logout_started = false;
955
	struct event_arg ea;
956
	scsi_qla_host_t *base_vha;
957 958 959

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
		"%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
960
		" s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
961
		__func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
962
		sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
963
		sess->logout_on_delete, sess->keep_nport_handle,
964
		sess->send_els_logo);
965

966
	if (!IS_SW_RESV_ADDR(sess->d_id)) {
967 968
		if (sess->send_els_logo) {
			qlt_port_logo_t logo;
969

970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985
			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;
		}
986
	}
987

988 989 990 991 992 993
	/*
	 * Release the target session for FC Nexus from fabric module code.
	 */
	if (sess->se_sess != NULL)
		ha->tgt.tgt_ops->free_session(sess);

994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
	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);
		}

1007
		ql_dbg(ql_dbg_disc, vha, 0xf087,
1008 1009 1010 1011 1012 1013 1014
		    "%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);
1015 1016
	}

1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
	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;
	}

1034
	if (sess->chip_reset != ha->base_qpair->chip_reset)
1035 1036 1037 1038 1039 1040 1041 1042 1043
		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);
	}

1044
	{
1045
		struct qlt_plogi_ack_t *own =
1046
		    sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1047
		struct qlt_plogi_ack_t *con =
1048
		    sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1049
		struct imm_ntfy_from_isp *iocb;
1050 1051

		if (con) {
1052
			iocb = &con->iocb;
1053
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1054 1055 1056 1057 1058 1059
				 "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);
1060
			qlt_plogi_ack_unref(vha, con);
1061
			sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1062 1063 1064 1065 1066 1067 1068 1069 1070
		} 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);
		}

1071 1072
		if (own) {
			sess->fw_login_state = DSC_LS_PLOGI_PEND;
1073
			qlt_plogi_ack_unref(vha, own);
1074 1075
			sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
		}
1076
	}
1077 1078
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

1079
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1080 1081
	    "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
		sess, sess->port_name, vha->fcport_count);
1082

1083
	if (tgt && (tgt->sess_count == 0))
1084
		wake_up_all(&tgt->waitQ);
1085 1086 1087 1088

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

1089 1090 1091 1092
	base_vha = pci_get_drvdata(ha->pdev);
	if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
		return;

1093 1094 1095 1096 1097 1098
	if (!tgt || !tgt->tgt_stop) {
		memset(&ea, 0, sizeof(ea));
		ea.event = FCME_DELETE_DONE;
		ea.fcport = sess;
		qla2x00_fcport_event_handler(vha, &ea);
	}
1099 1100
}

1101
/* ha->tgt.sess_lock supposed to be held on entry */
1102
void qlt_unreg_sess(struct fc_port *sess)
1103 1104 1105
{
	struct scsi_qla_host *vha = sess->vha;

1106
	ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1107 1108 1109
	    "%s sess %p for deletion %8phC\n",
	    __func__, sess, sess->port_name);

1110 1111
	if (sess->se_sess)
		vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1112

1113 1114
	qla2x00_mark_device_lost(vha, sess, 1, 1);

1115
	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1116 1117 1118
	sess->disc_state = DSC_DELETE_PEND;
	sess->last_rscn_gen = sess->rscn_gen;
	sess->last_login_gen = sess->login_gen;
1119

1120 1121 1122
	if (sess->nvme_flag & NVME_FLAG_REGISTERED)
		schedule_work(&sess->nvme_del_work);

1123 1124 1125
	INIT_WORK(&sess->free_work, qlt_free_session_done);
	schedule_work(&sess->free_work);
}
1126
EXPORT_SYMBOL(qlt_unreg_sess);
1127

1128 1129 1130
static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
{
	struct qla_hw_data *ha = vha->hw;
1131
	struct fc_port *sess = NULL;
1132 1133 1134
	uint16_t loop_id;
	int res = 0;
	struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1135
	unsigned long flags;
1136 1137 1138 1139

	loop_id = le16_to_cpu(n->u.isp24.nport_handle);
	if (loop_id == 0xFFFF) {
		/* Global event */
1140
		atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1141
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1142
		qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1143
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1144
	} else {
1145
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1146
		sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1147
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
	}

	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,
1158 1159
	    "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
	    "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1160 1161
	    mcmd, loop_id);

1162
	return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1163 1164
}

1165 1166
static void qla24xx_chk_fcp_state(struct fc_port *sess)
{
1167
	if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1168 1169 1170 1171 1172 1173 1174
		sess->logout_on_delete = 0;
		sess->logo_ack_needed = 0;
		sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
		sess->scan_state = 0;
	}
}

1175
/* ha->tgt.sess_lock supposed to be held on entry */
1176
void qlt_schedule_sess_for_deletion(struct fc_port *sess,
1177 1178 1179 1180
	bool immediate)
{
	struct qla_tgt *tgt = sess->tgt;

1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191
	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])
1192 1193
			return;
	}
1194

1195
	sess->disc_state = DSC_DELETE_PEND;
1196

1197 1198 1199 1200 1201
	if (sess->deleted == QLA_SESS_DELETED)
		sess->logout_on_delete = 0;

	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
	qla24xx_chk_fcp_state(sess);
1202

1203 1204
	ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
	    "Scheduling sess %p for deletion\n", sess);
1205

1206 1207
	schedule_work(&sess->del_work);
}
1208

1209 1210 1211 1212 1213 1214 1215
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);
1216 1217
}

1218
/* ha->tgt.sess_lock supposed to be held on entry */
J
Joern Engel 已提交
1219
static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1220
{
1221 1222
	struct fc_port *sess;
	scsi_qla_host_t *vha = tgt->vha;
1223

1224 1225
	list_for_each_entry(sess, &vha->vp_fcports, list) {
		if (sess->se_sess)
1226
			qlt_schedule_sess_for_deletion(sess, 1);
1227
	}
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251

	/* 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 */
1252
	rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1253 1254 1255 1256
	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);
1257
		res = -EBUSY;
1258 1259 1260 1261
		goto out_free_id_list;
	}

	id_iter = (char *)gid_list;
1262
	res = -ENOENT;
1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284
	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.
 */
1285
static struct fc_port *qlt_create_sess(
1286 1287 1288 1289 1290
	struct scsi_qla_host *vha,
	fc_port_t *fcport,
	bool local)
{
	struct qla_hw_data *ha = vha->hw;
1291
	struct fc_port *sess = fcport;
1292 1293
	unsigned long flags;

1294 1295
	if (vha->vha_tgt.qla_tgt->tgt_stop)
		return NULL;
1296

1297 1298
	if (fcport->se_sess) {
		if (!kref_get_unless_zero(&sess->sess_kref)) {
1299
			ql_dbg(ql_dbg_disc, vha, 0x20f6,
1300 1301 1302
			    "%s: kref_get_unless_zero failed for %8phC\n",
			    __func__, sess->port_name);
			return NULL;
1303
		}
1304
		return fcport;
1305
	}
1306
	sess->tgt = vha->vha_tgt.qla_tgt;
1307
	sess->local = local;
1308

1309 1310
	/*
	 * Under normal circumstances we want to logout from firmware when
1311 1312
	 * session eventually ends and release corresponding nport handle.
	 * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1313 1314
	 * code will adjust these flags as necessary.
	 */
1315 1316
	sess->logout_on_delete = 1;
	sess->keep_nport_handle = 0;
1317
	sess->logout_completed = 0;
1318

1319 1320
	if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
	    &fcport->port_name[0], sess) < 0) {
1321
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1322 1323 1324 1325 1326 1327 1328 1329 1330 1331
		    "(%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)) {
1332
			ql_dbg(ql_dbg_disc, vha, 0x20f7,
1333 1334 1335 1336
			    "%s: kref_get_unless_zero failed for %8phC\n",
			    __func__, sess->port_name);
			return NULL;
		}
1337

1338 1339 1340
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
		if (!IS_SW_RESV_ADDR(sess->d_id))
			vha->vha_tgt.qla_tgt->sess_count++;
1341

1342 1343 1344 1345 1346 1347 1348 1349
		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);
1350 1351

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1352 1353 1354
	    "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,
1355 1356
	    fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
	    sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1357 1358 1359 1360

	return sess;
}

1361 1362 1363 1364 1365 1366
/*
 * 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)
1367
{
1368
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1369
	struct fc_port *sess = fcport;
1370
	unsigned long flags;
1371 1372 1373 1374

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

1375
	if (!tgt)
1376 1377
		return;

1378
	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1379
	if (tgt->tgt_stop) {
1380
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1381 1382
		return;
	}
1383
	if (!sess->se_sess) {
1384
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1385 1386 1387
		return;
	}

1388
	if (max_gen - sess->generation < 0) {
1389
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1390 1391 1392 1393 1394 1395 1396 1397
		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;
	}

1398 1399 1400 1401
	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);
1402
	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413
}

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()
	 */
1414
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1415
	ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1416 1417
	    "tgt %p, sess_count=%d\n",
	    tgt, tgt->sess_count);
1418
	res = (tgt->sess_count == 0);
1419
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1420 1421 1422 1423 1424

	return res;
}

/* Called by tcm_qla2xxx configfs code */
1425
int qlt_stop_phase1(struct qla_tgt *tgt)
1426 1427 1428 1429 1430
{
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = tgt->ha;
	unsigned long flags;

1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442
	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);
1443 1444
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
			    "NPIV is in use. Can not stop target\n");
1445 1446 1447
			return -EPERM;
		}
	}
1448 1449 1450
	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");
1451 1452
		mutex_unlock(&qla_tgt_mutex);
		return -EPERM;
1453 1454
	}

1455
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1456 1457 1458 1459 1460
	    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.
	 */
1461
	mutex_lock(&vha->vha_tgt.tgt_mutex);
1462
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1463
	tgt->tgt_stop = 1;
J
Joern Engel 已提交
1464
	qlt_clear_tgt_db(tgt);
1465
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1466
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1467
	mutex_unlock(&qla_tgt_mutex);
1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479

	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,
1480
	    "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1481

1482
	wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1483 1484

	/* Big hammer */
1485 1486
	if (!ha->flags.host_shutting_down &&
	    (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1487 1488 1489
		qlt_disable_vha(vha);

	/* Wait for sessions to clear out (just in case) */
1490
	wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1491
	return 0;
1492 1493 1494 1495 1496 1497
}
EXPORT_SYMBOL(qlt_stop_phase1);

/* Called by tcm_qla2xxx configfs code */
void qlt_stop_phase2(struct qla_tgt *tgt)
{
1498
	scsi_qla_host_t *vha = tgt->vha;
1499 1500

	if (tgt->tgt_stopped) {
1501
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1502 1503 1504 1505
		    "Already in tgt->tgt_stopped state\n");
		dump_stack();
		return;
	}
1506 1507 1508 1509 1510 1511
	if (!tgt->tgt_stop) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
		    "%s: phase1 stop is not completed\n", __func__);
		dump_stack();
		return;
	}
1512

1513
	mutex_lock(&vha->vha_tgt.tgt_mutex);
1514 1515
	tgt->tgt_stop = 0;
	tgt->tgt_stopped = 1;
1516
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1517

1518
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1519 1520 1521 1522 1523
	    tgt);
}
EXPORT_SYMBOL(qlt_stop_phase2);

/* Called from qlt_remove_target() -> qla2x00_remove_one() */
1524
static void qlt_release(struct qla_tgt *tgt)
1525
{
1526
	scsi_qla_host_t *vha = tgt->vha;
1527 1528 1529 1530
	void *node;
	u64 key = 0;
	u16 i;
	struct qla_qpair_hint *h;
1531

1532 1533 1534 1535
	if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
	    !tgt->tgt_stopped)
		qlt_stop_phase1(tgt);

1536
	if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1537 1538
		qlt_stop_phase2(tgt);

1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556
	for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
		unsigned long flags;

		h = &tgt->qphints[i];
		if (h->qpair) {
			spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
			list_del(&h->hint_elem);
			spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
			h->qpair = NULL;
		}
	}
	kfree(tgt->qphints);

	btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
		btree_remove64(&tgt->lun_qpair_map, key);

	btree_destroy64(&tgt->lun_qpair_map);

1557
	vha->vha_tgt.qla_tgt = NULL;
1558

1559
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599
	    "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
 */
1600
static void qlt_send_notify_ack(struct qla_qpair *qpair,
1601 1602 1603 1604
	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)
{
1605
	struct scsi_qla_host *vha = qpair->vha;
1606 1607 1608 1609
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	struct nack_to_isp *nack;

1610 1611 1612
	if (!ha->flags.fw_started)
		return;

1613 1614
	ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);

1615
	pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1616 1617 1618 1619 1620 1621 1622
	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;
	}

1623 1624
	if (vha->vha_tgt.qla_tgt != NULL)
		vha->vha_tgt.qla_tgt->notify_ack_expected++;
1625 1626 1627 1628 1629 1630 1631

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

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

1632
	nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1633 1634 1635
	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 &
1636
			cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1637 1638 1639 1640
	}
	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;
1641
	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653
	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);

1654 1655
	/* Memory Barrier */
	wmb();
1656
	qla2x00_start_iocbs(vha, qpair->req);
1657 1658 1659 1660 1661
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
1662
static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1663 1664 1665
	struct abts_recv_from_24xx *abts, uint32_t status,
	bool ids_reversed)
{
1666
	struct scsi_qla_host *vha = qpair->vha;
1667 1668 1669 1670 1671 1672 1673 1674 1675
	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);

1676 1677
	resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
	    NULL);
1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691
	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;
1692
	f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728
	    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 */
	}

1729
	vha->vha_tgt.qla_tgt->abts_resp_expected++;
1730

1731 1732
	/* Memory Barrier */
	wmb();
1733 1734 1735 1736
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749
}

/*
 * 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);

1750 1751
	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
	    vha->hw->base_qpair, NULL);
1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767
	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;
1768
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1769 1770 1771 1772 1773
	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;
1774 1775
	ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
					    CTIO7_FLAGS_TERMINATE);
1776
	ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1777

1778 1779
	/* Memory Barrier */
	wmb();
1780 1781
	qla2x00_start_iocbs(vha, vha->req);

1782 1783
	qlt_24xx_send_abts_resp(vha->hw->base_qpair,
	    (struct abts_recv_from_24xx *)entry,
1784 1785 1786
	    FCP_TMF_CMPL, true);
}

1787 1788 1789 1790
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;
1791
	unsigned long flags;
1792

1793
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
1794 1795 1796
	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
		if (tag == op->atio.u.isp24.exchange_addr) {
			op->aborted = true;
1797
			spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1798 1799 1800 1801
			return 1;
		}
	}

1802 1803 1804
	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
		if (tag == op->atio.u.isp24.exchange_addr) {
			op->aborted = true;
1805
			spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1806 1807 1808 1809
			return 1;
		}
	}

1810 1811
	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		if (tag == cmd->atio.u.isp24.exchange_addr) {
1812
			cmd->aborted = 1;
1813
			spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1814 1815 1816
			return 1;
		}
	}
1817
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1818 1819 1820 1821 1822 1823 1824 1825 1826 1827

	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,
1828
			        u64 lun, uint8_t *s_id)
1829 1830 1831 1832
{
	struct qla_tgt_sess_op *op;
	struct qla_tgt_cmd *cmd;
	uint32_t key;
1833
	unsigned long flags;
1834 1835

	key = sid_to_key(s_id);
1836
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
1837 1838
	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
		uint32_t op_key;
1839
		u64 op_lun;
1840 1841 1842 1843 1844 1845 1846

		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;
	}
1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858

	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;
	}

1859 1860
	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		uint32_t cmd_key;
1861
		u64 cmd_lun;
1862 1863 1864 1865 1866

		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)
1867
			cmd->aborted = 1;
1868
	}
1869
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1870 1871
}

1872 1873
/* ha->hardware_lock supposed to be held on entry */
static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1874
	struct abts_recv_from_24xx *abts, struct fc_port *sess)
1875 1876 1877 1878
{
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_mgmt_cmd *mcmd;
	int rc;
1879

1880 1881
	if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
		/* send TASK_ABORT response immediately */
1882
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
1883
		return 0;
1884
	}
1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900

	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));
1901
	mcmd->reset_count = ha->base_qpair->chip_reset;
1902
	mcmd->tmr_func = QLA_TGT_ABTS;
1903
	mcmd->qpair = ha->base_qpair;
1904

1905 1906 1907 1908 1909
	/*
	 * LUN is looked up by target-core internally based on the passed
	 * abts->exchange_addr_to_abort tag.
	 */
	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, mcmd->tmr_func,
1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928
	    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;
1929
	struct fc_port *sess;
1930 1931 1932
	uint32_t tag = abts->exchange_addr_to_abort;
	uint8_t s_id[3];
	int rc;
1933
	unsigned long flags;
1934 1935 1936 1937 1938

	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);
1939 1940
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
		    false);
1941 1942 1943 1944 1945 1946 1947
		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);
1948 1949
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
		    false);
1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962
		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];

1963
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1964 1965 1966 1967 1968
	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);
1969
		rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1970
		    QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1971 1972 1973

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

1974
		if (rc != 0) {
1975 1976
			qlt_24xx_send_abts_resp(ha->base_qpair, abts,
			    FCP_TMF_REJECTED, false);
1977 1978 1979
		}
		return;
	}
1980 1981
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

1982

1983
	if (sess->deleted) {
1984 1985
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
		    false);
1986 1987 1988
		return;
	}

1989 1990 1991 1992 1993
	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);
1994 1995
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
		    false);
1996 1997 1998 1999 2000 2001 2002
		return;
	}
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
2003
static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2004 2005
	struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
{
2006
	struct scsi_qla_host *ha = qpair->vha;
2007 2008
	struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
	struct ctio7_to_24xx *ctio;
2009
	uint16_t temp;
2010 2011 2012 2013 2014 2015

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


2016
	ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027
	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;
2028
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2029 2030 2031 2032 2033
	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;
2034 2035 2036
	temp = (atio->u.isp24.attr << 9)|
		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
	ctio->u.status1.flags = cpu_to_le16(temp);
2037 2038
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio->u.status1.ox_id = cpu_to_le16(temp);
2039
	ctio->u.status1.scsi_status =
2040 2041
	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
	ctio->u.status1.response_len = cpu_to_le16(8);
2042
	ctio->u.status1.sense_data[0] = resp_code;
2043

2044 2045
	/* Memory Barrier */
	wmb();
2046 2047 2048 2049
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(ha, qpair->req);
2050 2051 2052 2053 2054 2055 2056 2057
}

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

2058 2059 2060 2061
/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then
 * reacquire
 */
2062
void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2063 2064 2065 2066 2067
    uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
{
	struct atio_from_isp *atio = &cmd->atio;
	struct ctio7_to_24xx *ctio;
	uint16_t temp;
2068
	struct scsi_qla_host *vha = cmd->vha;
2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092

	ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
	    "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
	    "sense_key=%02x, asc=%02x, ascq=%02x",
	    vha, atio, scsi_status, sense_key, asc, ascq);

	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
	if (!ctio) {
		ql_dbg(ql_dbg_async, vha, 0x3067,
		    "qla2x00t(%ld): %s failed: unable to allocate request packet",
		    vha->host_no, __func__);
		goto out;
	}

	ctio->entry_type = CTIO_TYPE7;
	ctio->entry_count = 1;
	ctio->handle = QLA_TGT_SKIP_HANDLE;
	ctio->nport_handle = cmd->sess->loop_id;
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
	ctio->vp_index = vha->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;
2093 2094 2095
	temp = (atio->u.isp24.attr << 9) |
	    CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
	ctio->u.status1.flags = cpu_to_le16(temp);
2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio->u.status1.ox_id = cpu_to_le16(temp);
	ctio->u.status1.scsi_status =
	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
	ctio->u.status1.response_len = cpu_to_le16(18);
	ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));

	if (ctio->u.status1.residual != 0)
		ctio->u.status1.scsi_status |=
		    cpu_to_le16(SS_RESIDUAL_UNDER);

	/* Response code and sense key */
	put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
	    (&ctio->u.status1.sense_data)[0]);
	/* Additional sense length */
	put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
	/* ASC and ASCQ */
	put_unaligned_le32(((asc << 24) | (ascq << 16)),
	    (&ctio->u.status1.sense_data)[3]);

	/* Memory Barrier */
	wmb();

2119 2120 2121 2122 2123
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);

2124 2125 2126 2127
out:
	return;
}

2128 2129 2130 2131 2132 2133
/* 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;
2134
	struct qla_qpair *qpair = mcmd->qpair;
2135 2136 2137 2138 2139

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

2140
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2141

2142
	if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2143
		/*
2144
		 * Either the port is not online or this request was from
2145 2146 2147
		 * previous life, just abort the processing.
		 */
		ql_dbg(ql_dbg_async, vha, 0xe100,
2148 2149
			"RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
2150
			mcmd->reset_count, qpair->chip_reset);
2151
		ha->tgt.tgt_ops->free_mcmd(mcmd);
2152
		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2153 2154 2155
		return;
	}

2156 2157
	if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
		if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2158 2159 2160 2161 2162
		    ELS_LOGO ||
		    mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
		    ELS_PRLO ||
		    mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
		    ELS_TPRLO) {
2163
			ql_dbg(ql_dbg_disc, vha, 0x2106,
2164 2165 2166 2167 2168
			    "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 {
2169 2170
			qlt_send_notify_ack(vha->hw->base_qpair,
			    &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2171 2172
		}
	} else {
2173
		if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2174
			qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2175 2176
			    mcmd->fc_tm_rsp, false);
		else
2177
			qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188
			    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);
2189
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200
}
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;
2201
	prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2202 2203 2204 2205 2206 2207
	    cmd->sg_cnt, cmd->dma_data_direction);
	if (unlikely(prm->seg_cnt == 0))
		goto out_err;

	prm->cmd->sg_mapped = 1;

2208 2209 2210 2211 2212
	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
		/*
		 * If greater than four sg entries then we need to allocate
		 * the continuation entries
		 */
2213
		if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2214
			prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2215 2216
			QLA_TGT_DATASEGS_PER_CMD_24XX,
			QLA_TGT_DATASEGS_PER_CONT_24XX);
2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227
	} 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;
2228
			prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243
				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;
		}
	}
2244 2245 2246 2247

	return 0;

out_err:
2248
	ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2249 2250 2251 2252 2253
	    "qla_target(%d): PCI mapping failed: sg_cnt=%d",
	    0, prm->cmd->sg_cnt);
	return -1;
}

J
Joern Engel 已提交
2254
static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2255
{
2256 2257
	struct qla_hw_data *ha;
	struct qla_qpair *qpair;
J
Joern Engel 已提交
2258 2259 2260
	if (!cmd->sg_mapped)
		return;

2261 2262 2263 2264
	qpair = cmd->qpair;

	pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
	    cmd->dma_data_direction);
2265
	cmd->sg_mapped = 0;
2266 2267

	if (cmd->prot_sg_cnt)
2268
		pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2269 2270
			cmd->dma_data_direction);

2271 2272
	if (!cmd->ctx)
		return;
2273
	ha = vha->hw;
2274
	if (cmd->ctx_dsd_alloced)
2275
		qla2x00_clean_dsd_pool(ha, cmd->ctx);
2276

2277
	dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2278 2279
}

2280
static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2281 2282
	uint32_t req_cnt)
{
2283
	uint32_t cnt;
2284
	struct req_que *req = qpair->req;
2285

2286
	if (req->cnt < (req_cnt + 2)) {
2287 2288
		cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
		    RD_REG_DWORD_RELAXED(req->req_q_out));
2289

2290 2291
		if  (req->ring_index < cnt)
			req->cnt = cnt - req->ring_index;
2292
		else
2293
			req->cnt = req->length - (req->ring_index - cnt);
2294

2295
		if (unlikely(req->cnt < (req_cnt + 2)))
2296
			return -EAGAIN;
2297
	}
2298

2299
	req->cnt -= req_cnt;
2300 2301 2302 2303 2304 2305 2306

	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
2307
static inline void *qlt_get_req_pkt(struct req_que *req)
2308 2309
{
	/* Adjust ring index. */
2310 2311 2312 2313
	req->ring_index++;
	if (req->ring_index == req->length) {
		req->ring_index = 0;
		req->ring_ptr = req->ring;
2314
	} else {
2315
		req->ring_ptr++;
2316
	}
2317
	return (cont_entry_t *)req->ring_ptr;
2318 2319 2320
}

/* ha->hardware_lock supposed to be held on entry */
2321
static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2322 2323
{
	uint32_t h;
2324 2325
	int index;
	uint8_t found = 0;
2326
	struct req_que *req = qpair->req;
2327 2328

	h = req->current_outstanding_cmd;
2329

2330 2331 2332 2333 2334 2335 2336 2337 2338 2339
	for (index = 1; index < req->num_outstanding_cmds; index++) {
		h++;
		if (h == req->num_outstanding_cmds)
			h = 1;

		if (h == QLA_TGT_SKIP_HANDLE)
			continue;

		if (!req->outstanding_cmds[h]) {
			found = 1;
2340 2341
			break;
		}
2342
	}
2343

2344 2345 2346
	if (found) {
		req->current_outstanding_cmd = h;
	} else {
2347 2348 2349
		ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
		    "qla_target(%d): Ran out of empty cmd slots\n",
		    qpair->vha->vp_idx);
2350 2351
		h = QLA_TGT_NULL_HANDLE;
	}
2352 2353 2354 2355 2356

	return h;
}

/* ha->hardware_lock supposed to be held on entry */
2357 2358
static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
	struct qla_tgt_prm *prm)
2359 2360 2361 2362
{
	uint32_t h;
	struct ctio7_to_24xx *pkt;
	struct atio_from_isp *atio = &prm->cmd->atio;
2363
	uint16_t temp;
2364

2365
	pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2366 2367 2368 2369 2370
	prm->pkt = pkt;
	memset(pkt, 0, sizeof(*pkt));

	pkt->entry_type = CTIO_TYPE7;
	pkt->entry_count = (uint8_t)prm->req_cnt;
2371
	pkt->vp_index = prm->cmd->vp_idx;
2372

2373
	h = qlt_make_handle(qpair);
2374 2375 2376 2377 2378 2379 2380
	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;
2381 2382
	} else
		qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2383

2384 2385 2386
	pkt->handle = MAKE_HANDLE(qpair->req->id, h);
	pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
	pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2387
	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2388 2389 2390 2391
	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;
2392 2393
	temp = atio->u.isp24.attr << 9;
	pkt->u.status0.flags |= cpu_to_le16(temp);
2394 2395
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	pkt->u.status0.ox_id = cpu_to_le16(temp);
2396 2397 2398 2399 2400 2401 2402 2403 2404
	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.
 */
2405
static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2406 2407 2408 2409 2410 2411 2412
{
	int cnt;
	uint32_t *dword_ptr;

	/* Build continuation packets */
	while (prm->seg_cnt > 0) {
		cont_a64_entry_t *cont_pkt64 =
2413 2414
			(cont_a64_entry_t *)qlt_get_req_pkt(
			   prm->cmd->qpair->req);
2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427

		/*
		 * 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;

2428 2429
		cont_pkt64->entry_type = CONTINUE_A64_TYPE;
		dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2430 2431 2432

		/* Load continuation entry data segments */
		for (cnt = 0;
2433
		    cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2434 2435 2436 2437
		    cnt++, prm->seg_cnt--) {
			*dword_ptr++ =
			    cpu_to_le32(pci_dma_lo32
				(sg_dma_address(prm->sg)));
2438 2439
			*dword_ptr++ = cpu_to_le32(pci_dma_hi32
			    (sg_dma_address(prm->sg)));
2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450
			*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.
 */
2451
static void qlt_load_data_segments(struct qla_tgt_prm *prm)
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
{
	int cnt;
	uint32_t *dword_ptr;
	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;
2477
	    (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2478 2479 2480
	    cnt++, prm->seg_cnt--) {
		*dword_ptr++ =
		    cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2481 2482 2483 2484

		*dword_ptr++ = cpu_to_le32(pci_dma_hi32(
			sg_dma_address(prm->sg)));

2485 2486 2487 2488 2489
		*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));

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

2490
	qlt_load_cont_data_segments(prm);
2491 2492 2493 2494 2495 2496 2497
}

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

2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509
static void qlt_print_dif_err(struct qla_tgt_prm *prm)
{
	struct qla_tgt_cmd *cmd;
	struct scsi_qla_host *vha;

	/* asc 0x10=dif error */
	if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
		cmd = prm->cmd;
		vha = cmd->vha;
		/* ASCQ */
		switch (prm->sense_buffer[13]) {
		case 1:
2510
			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2511 2512 2513 2514 2515 2516
			    "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
			    "se_cmd=%p tag[%x]",
			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
			    cmd->atio.u.isp24.exchange_addr);
			break;
		case 2:
2517
			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2518 2519 2520 2521 2522 2523
			    "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
			    "se_cmd=%p tag[%x]",
			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
			    cmd->atio.u.isp24.exchange_addr);
			break;
		case 3:
2524
			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2525 2526 2527 2528 2529 2530
			    "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
			    "se_cmd=%p tag[%x]",
			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
			    cmd->atio.u.isp24.exchange_addr);
			break;
		default:
2531
			ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2532 2533 2534 2535 2536 2537
			    "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
			    "se_cmd=%p tag[%x]",
			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
			    cmd->atio.u.isp24.exchange_addr);
			break;
		}
2538
		ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2539 2540 2541
	}
}

2542 2543 2544 2545 2546 2547 2548 2549
/*
 * 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 se_cmd *se_cmd = &cmd->se_cmd;
2550
	struct qla_qpair *qpair = cmd->qpair;
2551 2552

	prm->cmd = cmd;
2553 2554
	prm->tgt = cmd->tgt;
	prm->pkt = NULL;
2555 2556 2557 2558 2559 2560
	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;
2561
	prm->residual = 0;
2562
	prm->add_status_pkt = 0;
2563 2564 2565
	prm->prot_sg = NULL;
	prm->prot_seg_cnt = 0;
	prm->tot_dsds = 0;
2566 2567 2568 2569 2570 2571 2572 2573 2574 2575

	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;
2576
		ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2577 2578 2579 2580
		    "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);
2581 2582 2583
		prm->rq_result |= SS_RESIDUAL_UNDER;
	} else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
		prm->residual = se_cmd->residual_count;
2584
		ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2585 2586 2587
		    "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);
2588 2589 2590 2591 2592 2593 2594 2595 2596 2597
		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) ||
2598
			    (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2599 2600 2601 2602 2603 2604 2605 2606 2607 2608
			    (prm->rq_result != 0))) {
				prm->add_status_pkt = 1;
				(*full_req_cnt)++;
			}
		}
	}

	return 0;
}

2609 2610
static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
    int sending_sense)
2611
{
2612
	if (cmd->qpair->enable_class_2)
2613 2614 2615 2616 2617
		return 0;

	if (sending_sense)
		return cmd->conf_compl_supported;
	else
2618 2619
		return cmd->qpair->enable_explicit_conf &&
                    cmd->conf_compl_supported;
2620 2621 2622 2623 2624 2625 2626
}

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));
2627
	ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2628
	if (qlt_need_explicit_conf(prm->cmd, 0)) {
2629
		ctio->u.status0.flags |= cpu_to_le16(
2630 2631 2632 2633 2634 2635 2636 2637
		    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;

2638
		if (qlt_need_explicit_conf(prm->cmd, 1)) {
2639
			if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2640
				ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2641 2642 2643 2644 2645
				    "Skipping EXPLICIT_CONFORM and "
				    "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
				    "non GOOD status\n");
				goto skip_explict_conf;
			}
2646
			ctio->u.status1.flags |= cpu_to_le16(
2647 2648 2649 2650 2651
			    CTIO7_FLAGS_EXPLICIT_CONFORM |
			    CTIO7_FLAGS_CONFORM_REQ);
		}
skip_explict_conf:
		ctio->u.status1.flags &=
2652
		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2653
		ctio->u.status1.flags |=
2654
		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2655
		ctio->u.status1.scsi_status |=
2656
		    cpu_to_le16(SS_SENSE_LEN_VALID);
2657 2658 2659 2660 2661
		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]);
2662 2663 2664

		qlt_print_dif_err(prm);

2665 2666
	} else {
		ctio->u.status1.flags &=
2667
		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2668
		ctio->u.status1.flags |=
2669
		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2670 2671 2672 2673 2674 2675 2676 2677
		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 ??? */
}

2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700
static inline int
qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
{
	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;
}

2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717
static inline int
qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
{
	switch (se_cmd->prot_op) {
	case TARGET_PROT_DIN_INSERT:
	case TARGET_PROT_DOUT_INSERT:
	case TARGET_PROT_DIN_STRIP:
	case TARGET_PROT_DOUT_STRIP:
	case TARGET_PROT_DIN_PASS:
	case TARGET_PROT_DOUT_PASS:
	    return 1;
	default:
	    return 0;
	}
	return 0;
}

2718
/*
2719
 * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2720
 */
2721 2722 2723
static void
qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
    uint16_t *pfw_prot_opts)
2724
{
2725
	struct se_cmd *se_cmd = &cmd->se_cmd;
2726
	uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2727 2728 2729
	scsi_qla_host_t *vha = cmd->tgt->vha;
	struct qla_hw_data *ha = vha->hw;
	uint32_t t32 = 0;
2730

2731 2732
	/*
	 * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2733 2734 2735
	 * have been immplemented by TCM, before AppTag is avail.
	 * Look for modesense_handlers[]
	 */
2736
	ctx->app_tag = 0;
2737 2738 2739
	ctx->app_tag_mask[0] = 0x0;
	ctx->app_tag_mask[1] = 0x0;

2740 2741 2742 2743 2744 2745 2746 2747 2748 2749
	if (IS_PI_UNINIT_CAPABLE(ha)) {
		if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
		    (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
			*pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
		else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
			*pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
	}

	t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);

2750 2751 2752
	switch (se_cmd->prot_type) {
	case TARGET_DIF_TYPE0_PROT:
		/*
2753 2754 2755
		 * No check for ql2xenablehba_err_chk, as it
		 * would be an I/O error if hba tag generation
		 * is not done.
2756 2757 2758 2759 2760 2761 2762 2763 2764
		 */
		ctx->ref_tag = cpu_to_le32(lba);
		/* 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;
	case TARGET_DIF_TYPE1_PROT:
2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780
	    /*
	     * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
	     * REF tag, and 16 bit app tag.
	     */
	    ctx->ref_tag = cpu_to_le32(lba);
	    if (!qla_tgt_ref_mask_check(se_cmd) ||
		!(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
		    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
		    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;
2781
	case TARGET_DIF_TYPE2_PROT:
2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797
	    /*
	     * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
	     * tag has to match LBA in CDB + N
	     */
	    ctx->ref_tag = cpu_to_le32(lba);
	    if (!qla_tgt_ref_mask_check(se_cmd) ||
		!(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
		    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
		    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;
2798
	case TARGET_DIF_TYPE3_PROT:
2799 2800 2801 2802 2803
	    /* For TYPE 3 protection: 16 bit GUARD only */
	    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
	    ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
		ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
	    break;
2804 2805 2806 2807
	}
}

static inline int
2808
qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824
{
	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;
2825
	struct qla_tc_param	tc;
2826
	uint16_t t16;
2827
	scsi_qla_host_t *vha = cmd->vha;
2828 2829 2830

	ha = vha->hw;

2831
	pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2832 2833 2834
	prm->pkt = pkt;
	memset(pkt, 0, sizeof(*pkt));

2835
	ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2836
		"qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2837
		cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851
		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;
2852 2853
		if (cmd->prot_sg_cnt)
			data_bytes += dif_bytes;
2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899
		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;
2900
	pkt->vp_index = cmd->vp_idx;
2901

2902
	h = qlt_make_handle(qpair);
2903 2904 2905 2906 2907 2908 2909 2910
	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
2911
		qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2912

2913 2914
	pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
	pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2915
	pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2916
	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2917 2918 2919 2920
	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;
2921 2922 2923 2924 2925 2926 2927

	/* 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);
2928 2929 2930 2931
	pkt->relative_offset = cpu_to_le32(prm->cmd->offset);

	/* Set transfer direction */
	if (cmd->dma_data_direction == DMA_TO_DEVICE)
2932
		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2933
	else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2934
		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958

	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;

2959
	qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982

	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);
2983
	crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2984

2985 2986 2987 2988 2989 2990 2991 2992
	memset((uint8_t *)&tc, 0 , sizeof(tc));
	tc.vha = vha;
	tc.blk_sz = cmd->blk_sz;
	tc.bufflen = cmd->bufflen;
	tc.sg = cmd->sg;
	tc.prot_sg = cmd->prot_sg;
	tc.ctx = crc_ctx_pkt;
	tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
2993 2994

	/* Walks data segments */
2995
	pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2996 2997 2998

	if (!bundling && prm->prot_seg_cnt) {
		if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2999
			prm->tot_dsds, &tc))
3000 3001
			goto crc_queuing_error;
	} else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3002
		(prm->tot_dsds - prm->prot_seg_cnt), &tc))
3003 3004 3005 3006
		goto crc_queuing_error;

	if (bundling && prm->prot_seg_cnt) {
		/* Walks dif segments */
3007
		pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3008 3009 3010

		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
		if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3011
			prm->prot_seg_cnt, &tc))
3012 3013 3014 3015 3016 3017
			goto crc_queuing_error;
	}
	return QLA_SUCCESS;

crc_queuing_error:
	/* Cleanup will be performed by the caller */
3018
	qpair->req->outstanding_cmds[h] = NULL;
3019 3020 3021 3022

	return QLA_FUNCTION_FAILED;
}

3023 3024 3025 3026 3027 3028 3029 3030
/*
 * 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;
3031
	struct qla_qpair *qpair = cmd->qpair;
3032 3033 3034 3035 3036 3037
	struct ctio7_to_24xx *pkt;
	struct qla_tgt_prm prm;
	uint32_t full_req_cnt = 0;
	unsigned long flags = 0;
	int res;

3038
	if (cmd->sess && cmd->sess->deleted) {
3039 3040 3041 3042 3043
		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
3044
			qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3045 3046 3047
		return 0;
	}

3048
	ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3049
	    "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3050 3051
	    (xmit_type & QLA_TGT_XMIT_STATUS) ?
	    1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3052
	    &cmd->se_cmd, qpair->id);
3053 3054 3055 3056 3057 3058 3059

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

3060
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3061

3062
	if (xmit_type == QLA_TGT_XMIT_STATUS)
3063
		qpair->tgt_counters.core_qla_snd_status++;
3064
	else
3065
		qpair->tgt_counters.core_qla_que_buf++;
3066

3067
	if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3068
		/*
3069
		 * Either the port is not online or this request was from
3070 3071 3072 3073
		 * previous life, just abort the processing.
		 */
		cmd->state = QLA_TGT_STATE_PROCESSED;
		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3074
		ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3075 3076
			"RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
3077
			cmd->reset_count, qpair->chip_reset);
3078
		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3079 3080 3081
		return 0;
	}

3082
	/* Does F/W have an IOCBs for this request */
3083
	res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3084 3085 3086
	if (unlikely(res))
		goto out_unmap_unlock;

3087
	if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3088
		res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3089
	else
3090
		res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3091
	if (unlikely(res != 0)) {
3092
		qpair->req->cnt += full_req_cnt;
3093
		goto out_unmap_unlock;
3094
	}
3095 3096 3097 3098 3099

	pkt = (struct ctio7_to_24xx *)prm.pkt;

	if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
		pkt->u.status0.flags |=
3100
		    cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3101 3102
			CTIO7_FLAGS_STATUS_MODE_0);

3103
		if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3104
			qlt_load_data_segments(&prm);
3105 3106 3107 3108 3109 3110 3111

		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);
3112
				pkt->u.status0.flags |= cpu_to_le16(
3113
				    CTIO7_FLAGS_SEND_STATUS);
3114
				if (qlt_need_explicit_conf(cmd, 0)) {
3115
					pkt->u.status0.flags |=
3116
					    cpu_to_le16(
3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128
						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 =
3129 3130
				(struct ctio7_to_24xx *)qlt_get_req_pkt(
				    qpair->req);
3131

3132
			ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3133 3134
			    "Building additional status packet 0x%p.\n",
			    ctio);
3135

3136 3137 3138 3139
			/*
			 * T10Dif: ctio_crc2_to_fw overlay ontop of
			 * ctio7_to_24xx
			 */
3140
			memcpy(ctio, pkt, sizeof(*ctio));
3141
			/* reset back to CTIO7 */
3142
			ctio->entry_count = 1;
3143
			ctio->entry_type = CTIO_TYPE7;
3144
			ctio->dseg_count = 0;
3145
			ctio->u.status1.flags &= ~cpu_to_le16(
3146 3147 3148 3149
			    CTIO7_FLAGS_DATA_IN);

			/* Real finish is ctio_m1's finish */
			pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3150
			pkt->u.status0.flags |= cpu_to_le16(
3151
			    CTIO7_FLAGS_DONT_RET_CTIO);
3152 3153 3154 3155 3156

			/* 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.
			 */
3157 3158 3159 3160 3161 3162 3163 3164
			qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
			    &prm);
		}
	} else
		qlt_24xx_init_ctio_to_isp(pkt, &prm);


	cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3165
	cmd->cmd_sent_to_fw = 1;
3166

3167 3168
	/* Memory Barrier */
	wmb();
3169 3170 3171 3172
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
3173
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3174 3175 3176 3177

	return 0;

out_unmap_unlock:
J
Joern Engel 已提交
3178
	qlt_unmap_sg(vha, cmd);
3179
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190

	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_tgt *tgt = cmd->tgt;
	struct qla_tgt_prm prm;
3191
	unsigned long flags = 0;
3192
	int res = 0;
3193
	struct qla_qpair *qpair = cmd->qpair;
3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204

	memset(&prm, 0, sizeof(prm));
	prm.cmd = cmd;
	prm.tgt = tgt;
	prm.sg = NULL;
	prm.req_cnt = 1;

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

3205
	if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3206
	    (cmd->sess && cmd->sess->deleted)) {
3207
		/*
3208
		 * Either the port is not online or this request was from
3209 3210 3211 3212
		 * previous life, just abort the processing.
		 */
		cmd->state = QLA_TGT_STATE_NEED_DATA;
		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3213
		ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3214 3215
			"RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
3216
			cmd->reset_count, qpair->chip_reset);
3217 3218 3219
		return 0;
	}

3220
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3221
	/* Does F/W have an IOCBs for this request */
3222
	res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3223 3224
	if (res != 0)
		goto out_unlock_free_unmap;
3225
	if (cmd->se_cmd.prot_op)
3226
		res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3227
	else
3228
		res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3229

3230
	if (unlikely(res != 0)) {
3231
		qpair->req->cnt += prm.req_cnt;
3232
		goto out_unlock_free_unmap;
3233 3234
	}

3235
	pkt = (struct ctio7_to_24xx *)prm.pkt;
3236
	pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3237
	    CTIO7_FLAGS_STATUS_MODE_0);
3238 3239

	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3240
		qlt_load_data_segments(&prm);
3241 3242

	cmd->state = QLA_TGT_STATE_NEED_DATA;
3243
	cmd->cmd_sent_to_fw = 1;
3244

3245 3246
	/* Memory Barrier */
	wmb();
3247 3248 3249 3250
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
3251
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3252 3253 3254 3255

	return res;

out_unlock_free_unmap:
J
Joern Engel 已提交
3256
	qlt_unmap_sg(vha, cmd);
3257
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3258 3259 3260 3261 3262

	return res;
}
EXPORT_SYMBOL(qlt_rdy_to_xfer);

3263 3264

/*
3265
 * it is assumed either hardware_lock or qpair lock is held.
3266
 */
3267
static void
3268
qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3269
	struct ctio_crc_from_fw *sts)
3270 3271 3272 3273
{
	uint8_t		*ap = &sts->actual_dif[0];
	uint8_t		*ep = &sts->expected_dif[0];
	uint64_t	lba = cmd->se_cmd.t_task_lba;
3274 3275
	uint8_t scsi_status, sense_key, asc, ascq;
	unsigned long flags;
3276
	struct scsi_qla_host *vha = cmd->vha;
3277

3278
	cmd->trc_flags |= TRC_DIF_ERR;
3279

3280 3281 3282
	cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
	cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
	cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3283

3284 3285 3286
	cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
	cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
	cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3287

3288 3289
	ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
	    "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3290

3291
	scsi_status = sense_key = asc = ascq = 0;
3292

3293 3294
	/* check appl tag */
	if (cmd->e_app_tag != cmd->a_app_tag) {
3295 3296 3297 3298 3299 3300
		ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
		    "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3301 3302 3303 3304 3305 3306

		cmd->dif_err_code = DIF_ERR_APP;
		scsi_status = SAM_STAT_CHECK_CONDITION;
		sense_key = ABORTED_COMMAND;
		asc = 0x10;
		ascq = 0x2;
3307 3308 3309
	}

	/* check ref tag */
3310
	if (cmd->e_ref_tag != cmd->a_ref_tag) {
3311 3312 3313 3314 3315 3316
		ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
		    "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ",
		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3317 3318 3319 3320 3321 3322

		cmd->dif_err_code = DIF_ERR_REF;
		scsi_status = SAM_STAT_CHECK_CONDITION;
		sense_key = ABORTED_COMMAND;
		asc = 0x10;
		ascq = 0x3;
3323 3324 3325
		goto out;
	}

3326 3327
	/* check guard */
	if (cmd->e_guard != cmd->a_guard) {
3328 3329 3330 3331 3332 3333 3334
		ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
		    "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
		    cmd->atio.u.isp24.fcp_hdr.ox_id);

3335 3336 3337 3338 3339
		cmd->dif_err_code = DIF_ERR_GRD;
		scsi_status = SAM_STAT_CHECK_CONDITION;
		sense_key = ABORTED_COMMAND;
		asc = 0x10;
		ascq = 0x1;
3340 3341
	}
out:
3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355
	switch (cmd->state) {
	case QLA_TGT_STATE_NEED_DATA:
		/* handle_data will load DIF error code  */
		cmd->state = QLA_TGT_STATE_DATA_IN;
		vha->hw->tgt.tgt_ops->handle_data(cmd);
		break;
	default:
		spin_lock_irqsave(&cmd->cmd_lock, flags);
		if (cmd->aborted) {
			spin_unlock_irqrestore(&cmd->cmd_lock, flags);
			vha->hw->tgt.tgt_ops->free_cmd(cmd);
			break;
		}
		spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3356

3357 3358
		qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
		    ascq);
3359 3360 3361 3362 3363 3364 3365
		/* assume scsi status gets out on the wire.
		 * Will not wait for completion.
		 */
		vha->hw->tgt.tgt_ops->free_cmd(cmd);
		break;
	}
}
3366

3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379
/* 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);

3380
	pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3381 3382 3383 3384 3385 3386 3387 3388 3389
	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;
3390
	pkt->handle = QLA_TGT_SKIP_HANDLE;
3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429

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

#if 0	/* Todo  */
		if (rc == -ENOMEM)
			qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3430 3431 3432
#else
		if (rc) {
		}
3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449
#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);
}

3450 3451 3452 3453
/*
 * If hardware_lock held on entry, might drop it, then reaquire
 * This function sends the appropriate CTIO to ISP 2xxx or 24xx
 */
3454
static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3455 3456 3457
	struct qla_tgt_cmd *cmd,
	struct atio_from_isp *atio)
{
3458
	struct scsi_qla_host *vha = qpair->vha;
3459 3460 3461 3462
	struct ctio7_to_24xx *ctio24;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	int ret = 0;
3463
	uint16_t temp;
3464

3465
	ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3466

3467
	pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484
	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;
	}

3485
	qpair->tgt_counters.num_term_xchg_sent++;
3486 3487 3488 3489 3490
	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;
3491
	ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3492
	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3493 3494 3495 3496 3497
	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;
3498 3499 3500
	temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
		CTIO7_FLAGS_TERMINATE;
	ctio24->u.status1.flags = cpu_to_le16(temp);
3501 3502
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio24->u.status1.ox_id = cpu_to_le16(temp);
3503 3504 3505 3506 3507 3508 3509 3510

	/* 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;

3511 3512
	/* Memory Barrier */
	wmb();
3513 3514 3515 3516
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
3517 3518 3519
	return ret;
}

3520
static void qlt_send_term_exchange(struct qla_qpair *qpair,
3521 3522
	struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
	int ul_abort)
3523
{
3524
	struct scsi_qla_host *vha;
3525
	unsigned long flags = 0;
3526 3527
	int rc;

3528 3529 3530 3531 3532
	/* why use different vha? NPIV */
	if (cmd)
		vha = cmd->vha;
	else
		vha = qpair->vha;
3533 3534

	if (ha_locked) {
3535
		rc = __qlt_send_term_exchange(qpair, cmd, atio);
3536 3537
		if (rc == -ENOMEM)
			qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3538 3539
		goto done;
	}
3540 3541
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
	rc = __qlt_send_term_exchange(qpair, cmd, atio);
3542 3543
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3544

3545
done:
3546
	if (cmd && !ul_abort && !cmd->aborted) {
3547 3548
		if (cmd->sg_mapped)
			qlt_unmap_sg(vha, cmd);
3549 3550
		vha->hw->tgt.tgt_ops->free_cmd(cmd);
	}
3551 3552

	if (!ha_locked)
3553
		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3554

3555
	return;
3556 3557
}

3558 3559 3560 3561 3562 3563
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 =
3564
	    (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
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

	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",
3594
		    total_leaked, vha->hw->cur_fw_xcb_count);
3595 3596 3597 3598 3599 3600 3601 3602 3603 3604

		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);
	}

}

3605
int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3606 3607 3608 3609
{
	struct qla_tgt *tgt = cmd->tgt;
	struct scsi_qla_host *vha = tgt->vha;
	struct se_cmd *se_cmd = &cmd->se_cmd;
3610
	unsigned long flags;
3611 3612 3613 3614 3615 3616

	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);

3617 3618 3619 3620 3621 3622 3623 3624
	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
		 */
3625 3626 3627 3628
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
		    "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);
3629 3630
		return EIO;
	}
3631
	cmd->aborted = 1;
3632
	cmd->trc_flags |= TRC_ABORT;
3633
	spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3634

3635
	qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3636
	return 0;
3637 3638 3639
}
EXPORT_SYMBOL(qlt_abort_cmd);

3640 3641
void qlt_free_cmd(struct qla_tgt_cmd *cmd)
{
3642
	struct fc_port *sess = cmd->sess;
3643

3644 3645 3646 3647
	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));
3648

3649 3650
	BUG_ON(cmd->cmd_in_wq);

3651 3652 3653
	if (cmd->sg_mapped)
		qlt_unmap_sg(cmd->vha, cmd);

3654 3655 3656
	if (!cmd->q_full)
		qlt_decr_num_pend_cmds(cmd->vha);

3657
	BUG_ON(cmd->sg_mapped);
3658
	cmd->jiffies_at_free = get_jiffies_64();
3659 3660
	if (unlikely(cmd->free_sg))
		kfree(cmd->sg);
3661 3662 3663 3664 3665

	if (!sess || !sess->se_sess) {
		WARN_ON(1);
		return;
	}
3666
	cmd->jiffies_at_free = get_jiffies_64();
3667
	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3668 3669 3670 3671 3672 3673
}
EXPORT_SYMBOL(qlt_free_cmd);

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
3674
static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3675 3676 3677
	struct qla_tgt_cmd *cmd, uint32_t status)
{
	int term = 0;
3678
	struct scsi_qla_host *vha = qpair->vha;
3679

3680
	if (cmd->se_cmd.prot_op)
3681
		ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3682 3683 3684 3685 3686 3687 3688 3689
		    "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
		    "se_cmd=%p tag[%x] op %#x/%s",
		     cmd->lba, cmd->lba,
		     cmd->num_blks, &cmd->se_cmd,
		     cmd->atio.u.isp24.exchange_addr,
		     cmd->se_cmd.prot_op,
		     prot_op_str(cmd->se_cmd.prot_op));

3690 3691 3692
	if (ctio != NULL) {
		struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
		term = !(c->flags &
3693
		    cpu_to_le16(OF_TERM_EXCH));
3694 3695 3696 3697
	} else
		term = 1;

	if (term)
3698
		qlt_term_ctio_exchange(qpair, ctio, cmd, status);
3699 3700 3701 3702 3703 3704 3705

	return term;
}


/* ha->hardware_lock supposed to be held on entry */
static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3706
	struct rsp_que *rsp, uint32_t handle, void *ctio)
3707 3708
{
	struct qla_tgt_cmd *cmd = NULL;
3709 3710 3711
	struct req_que *req;
	int qid = GET_QID(handle);
	uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3712

3713 3714
	if (unlikely(h == QLA_TGT_SKIP_HANDLE))
		return NULL;
3715

3716 3717 3718 3719 3720 3721 3722 3723 3724 3725
	if (qid == rsp->req->id) {
		req = rsp->req;
	} else if (vha->hw->req_q_map[qid]) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
		    "qla_target(%d): CTIO completion with different QID %d handle %x\n",
		    vha->vp_idx, rsp->id, handle);
		req = vha->hw->req_q_map[qid];
	} else {
		return NULL;
	}
3726

3727
	h &= QLA_CMD_HANDLE_MASK;
3728

3729
	if (h != QLA_TGT_NULL_HANDLE) {
3730
		if (unlikely(h >= req->num_outstanding_cmds)) {
3731 3732 3733 3734 3735
			ql_dbg(ql_dbg_tgt, vha, 0xe052,
			    "qla_target(%d): Wrong handle %x received\n",
			    vha->vp_idx, handle);
			return NULL;
		}
3736 3737 3738

		cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
		if (unlikely(cmd == NULL)) {
3739
			ql_dbg(ql_dbg_async, vha, 0xe053,
3740 3741
			    "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
				vha->vp_idx, handle, req->id, rsp->id);
3742 3743
			return NULL;
		}
3744
		req->outstanding_cmds[h] = NULL;
3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755
	} 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;
}

3756
/* hardware_lock should be held by caller. */
3757
void
3758 3759 3760 3761 3762 3763 3764 3765 3766 3767
qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
{
	struct qla_hw_data *ha = vha->hw;

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

	/* TODO: fix debug message type and ids. */
	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
		ql_dbg(ql_dbg_io, vha, 0xff00,
3768
		    "HOST-ABORT: state=PROCESSED.\n");
3769 3770 3771 3772 3773
	} 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,
3774
		    "HOST-ABORT: state=DATA_IN.\n");
3775 3776 3777 3778 3779

		ha->tgt.tgt_ops->handle_data(cmd);
		return;
	} else {
		ql_dbg(ql_dbg_io, vha, 0xff03,
3780
		    "HOST-ABORT: state=BAD(%d).\n",
3781 3782 3783 3784
		    cmd->state);
		dump_stack();
	}

3785
	cmd->trc_flags |= TRC_FLUSH;
3786 3787 3788
	ha->tgt.tgt_ops->free_cmd(cmd);
}

3789 3790 3791
/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
3792 3793
static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
    struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3794 3795 3796 3797
{
	struct qla_hw_data *ha = vha->hw;
	struct se_cmd *se_cmd;
	struct qla_tgt_cmd *cmd;
3798
	struct qla_qpair *qpair = rsp->qpair;
3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809

	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;
	}

3810
	cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3811
	if (cmd == NULL)
3812
		return;
3813

3814
	se_cmd = &cmd->se_cmd;
3815
	cmd->cmd_sent_to_fw = 0;
3816

J
Joern Engel 已提交
3817
	qlt_unmap_sg(vha, cmd);
3818 3819 3820 3821 3822 3823

	if (unlikely(status != CTIO_SUCCESS)) {
		switch (status & 0xFFFF) {
		case CTIO_LIP_RESET:
		case CTIO_TARGET_RESET:
		case CTIO_ABORTED:
3824
			/* driver request abort via Terminate exchange */
3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837
		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:
3838
		{
3839 3840 3841
			int logged_out =
				(status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;

3842
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3843
			    "qla_target(%d): CTIO with %s status %x "
3844
			    "received (state %x, se_cmd %p)\n", vha->vp_idx,
3845
			    logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3846 3847
			    status, cmd->state, se_cmd);

3848 3849 3850 3851 3852 3853 3854
			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;
3855
				ql_dbg(ql_dbg_disc, vha, 0x20f8,
3856 3857 3858 3859
				    "%s %d %8phC post del sess\n",
				    __func__, __LINE__, cmd->sess->port_name);

				qlt_schedule_sess_for_deletion_lock(cmd->sess);
3860 3861 3862
			}
			break;
		}
3863 3864 3865 3866
		case CTIO_DIF_ERROR: {
			struct ctio_crc_from_fw *crc =
				(struct ctio_crc_from_fw *)ctio;
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3867 3868 3869
			    "qla_target(%d): CTIO with DIF_ERROR status %x "
			    "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
			    "expect_dif[0x%llx]\n",
3870 3871 3872 3873
			    vha->vp_idx, status, cmd->state, se_cmd,
			    *((u64 *)&crc->actual_dif[0]),
			    *((u64 *)&crc->expected_dif[0]));

3874
			qlt_handle_dif_error(qpair, cmd, ctio);
3875
			return;
3876
		}
3877 3878
		default:
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3879
			    "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3880 3881 3882 3883
			    vha->vp_idx, status, cmd->state, se_cmd);
			break;
		}

3884

3885
		/* "cmd->aborted" means
3886 3887 3888 3889 3890 3891
		 * 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) &&
3892
		    (!cmd->aborted)) {
3893
			cmd->trc_flags |= TRC_CTIO_ERR;
3894
			if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
3895
				return;
3896
		}
3897 3898 3899
	}

	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3900
		cmd->trc_flags |= TRC_CTIO_DONE;
3901 3902 3903
	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
		cmd->state = QLA_TGT_STATE_DATA_IN;

3904
		if (status == CTIO_SUCCESS)
3905 3906 3907 3908
			cmd->write_data_transferred = 1;

		ha->tgt.tgt_ops->handle_data(cmd);
		return;
3909
	} else if (cmd->aborted) {
3910
		cmd->trc_flags |= TRC_CTIO_ABORTED;
3911
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3912
		  "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3913
	} else {
3914
		cmd->trc_flags |= TRC_CTIO_STRANGE;
3915 3916 3917 3918 3919
		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);
	}

3920
	if (unlikely(status != CTIO_SUCCESS) &&
3921
		!cmd->aborted) {
3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935
		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
3936
		fcp_task_attr = TCM_SIMPLE_TAG;
3937 3938
		break;
	case ATIO_HEAD_OF_QUEUE:
C
Christoph Hellwig 已提交
3939
		fcp_task_attr = TCM_HEAD_TAG;
3940 3941
		break;
	case ATIO_ORDERED_QUEUE:
C
Christoph Hellwig 已提交
3942
		fcp_task_attr = TCM_ORDERED_TAG;
3943 3944
		break;
	case ATIO_ACA_QUEUE:
C
Christoph Hellwig 已提交
3945
		fcp_task_attr = TCM_ACA_TAG;
3946 3947
		break;
	case ATIO_UNTAGGED:
C
Christoph Hellwig 已提交
3948
		fcp_task_attr = TCM_SIMPLE_TAG;
3949 3950 3951 3952 3953
		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
3954
		fcp_task_attr = TCM_ORDERED_TAG;
3955 3956 3957 3958 3959 3960
		break;
	}

	return fcp_task_attr;
}

3961
static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
3962 3963 3964 3965
					uint8_t *);
/*
 * Process context for I/O path into tcm_qla2xxx code
 */
3966
static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3967 3968 3969
{
	scsi_qla_host_t *vha = cmd->vha;
	struct qla_hw_data *ha = vha->hw;
3970
	struct fc_port *sess = cmd->sess;
3971 3972 3973 3974 3975
	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;
3976
	struct qla_qpair *qpair = cmd->qpair;
3977

3978
	cmd->cmd_in_wq = 0;
3979
	cmd->trc_flags |= TRC_DO_WORK;
3980

3981
	if (cmd->aborted) {
3982 3983 3984 3985 3986 3987
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
		    "cmd with tag %u is aborted\n",
		    cmd->atio.u.isp24.exchange_addr);
		goto out_term;
	}

3988
	spin_lock_init(&cmd->cmd_lock);
3989
	cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3990
	cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008

	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]));

4009 4010
	ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
				          fcp_task_attr, data_dir, bidi);
4011 4012 4013 4014 4015
	if (ret != 0)
		goto out_term;
	/*
	 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
	 */
4016
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4017
	ha->tgt.tgt_ops->put_sess(sess);
4018
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4019 4020 4021
	return;

out_term:
4022
	ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4023
	/*
4024 4025
	 * cmd has not sent to target yet, so pass NULL as the second
	 * argument to qlt_send_term_exchange() and free the memory here.
4026
	 */
4027
	cmd->trc_flags |= TRC_DO_WORK_ERR;
4028 4029
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
	qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4030 4031

	qlt_decr_num_pend_cmds(vha);
4032
	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4033
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4034 4035

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4036
	ha->tgt.tgt_ops->put_sess(sess);
4037
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4038 4039 4040 4041 4042
}

static void qlt_do_work(struct work_struct *work)
{
	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4043 4044 4045 4046 4047 4048
	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);
4049 4050 4051 4052

	__qlt_do_work(cmd);
}

4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077
void qlt_clr_qp_table(struct scsi_qla_host *vha)
{
	unsigned long flags;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	void *node;
	u64 key = 0;

	ql_log(ql_log_info, vha, 0x706c,
	    "User update Number of Active Qpairs %d\n",
	    ha->tgt.num_act_qpairs);

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

	btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
		btree_remove64(&tgt->lun_qpair_map, key);

	ha->base_qpair->lun_cnt = 0;
	for (key = 0; key < ha->max_qpairs; key++)
		if (ha->queue_pair_map[key])
			ha->queue_pair_map[key]->lun_cnt = 0;

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

4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156
static void qlt_assign_qpair(struct scsi_qla_host *vha,
	struct qla_tgt_cmd *cmd)
{
	struct qla_qpair *qpair, *qp;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	struct qla_qpair_hint *h;

	if (vha->flags.qpairs_available) {
		h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
		if (unlikely(!h)) {
			/* spread lun to qpair ratio evently */
			int lcnt = 0, rc;
			struct scsi_qla_host *base_vha =
				pci_get_drvdata(vha->hw->pdev);

			qpair = vha->hw->base_qpair;
			if (qpair->lun_cnt == 0) {
				qpair->lun_cnt++;
				h = qla_qpair_to_hint(tgt, qpair);
				BUG_ON(!h);
				rc = btree_insert64(&tgt->lun_qpair_map,
					cmd->unpacked_lun, h, GFP_ATOMIC);
				if (rc) {
					qpair->lun_cnt--;
					ql_log(ql_log_info, vha, 0xd037,
					    "Unable to insert lun %llx into lun_qpair_map\n",
					    cmd->unpacked_lun);
				}
				goto out;
			} else {
				lcnt = qpair->lun_cnt;
			}

			h = NULL;
			list_for_each_entry(qp, &base_vha->qp_list,
			    qp_list_elem) {
				if (qp->lun_cnt == 0) {
					qp->lun_cnt++;
					h = qla_qpair_to_hint(tgt, qp);
					BUG_ON(!h);
					rc = btree_insert64(&tgt->lun_qpair_map,
					    cmd->unpacked_lun, h, GFP_ATOMIC);
					if (rc) {
						qp->lun_cnt--;
						ql_log(ql_log_info, vha, 0xd038,
							"Unable to insert lun %llx into lun_qpair_map\n",
							cmd->unpacked_lun);
					}
					qpair = qp;
					goto out;
				} else {
					if (qp->lun_cnt < lcnt) {
						lcnt = qp->lun_cnt;
						qpair = qp;
						continue;
					}
				}
			}
			BUG_ON(!qpair);
			qpair->lun_cnt++;
			h = qla_qpair_to_hint(tgt, qpair);
			BUG_ON(!h);
			rc = btree_insert64(&tgt->lun_qpair_map,
				cmd->unpacked_lun, h, GFP_ATOMIC);
			if (rc) {
				qpair->lun_cnt--;
				ql_log(ql_log_info, vha, 0xd039,
				   "Unable to insert lun %llx into lun_qpair_map\n",
				   cmd->unpacked_lun);
			}
		}
	} else {
		h = &tgt->qphints[0];
	}
out:
	cmd->qpair = h->qpair;
	cmd->se_cmd.cpuid = h->cpuid;
}

4157
static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4158
				       struct fc_port *sess,
4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170
				       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));
4171
	cmd->cmd_type = TYPE_TGT_CMD;
4172 4173 4174
	memcpy(&cmd->atio, atio, sizeof(*atio));
	cmd->state = QLA_TGT_STATE_NEW;
	cmd->tgt = vha->vha_tgt.qla_tgt;
4175
	qlt_incr_num_pend_cmds(vha);
4176 4177 4178 4179 4180 4181
	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;

4182
	cmd->trc_flags = 0;
4183 4184
	cmd->jiffies_at_alloc = get_jiffies_64();

4185 4186 4187
	cmd->unpacked_lun = scsilun_to_int(
	    (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
	qlt_assign_qpair(vha, cmd);
4188
	cmd->reset_count = vha->hw->base_qpair->chip_reset;
4189
	cmd->vp_idx = vha->vp_idx;
4190

4191 4192 4193 4194 4195 4196 4197 4198 4199
	return cmd;
}

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;
4200
	struct fc_port *sess;
4201 4202 4203 4204
	struct qla_tgt_cmd *cmd;
	unsigned long flags;
	uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;

4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215
	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;
	}

4216
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
4217 4218 4219
	    "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]);
4220 4221 4222

	if (op->atio.u.raw.entry_count > 1) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
4223
		    "Dropping multy entry atio %p\n", &op->atio);
4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238
		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) {
4239 4240 4241 4242 4243 4244 4245
		struct qla_qpair *qpair = ha->base_qpair;

		spin_lock_irqsave(qpair->qp_lock_ptr, flags);
		qlt_send_busy(qpair, &op->atio, SAM_STAT_BUSY);
		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);

		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4246
		ha->tgt.tgt_ops->put_sess(sess);
4247
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4248 4249 4250
		kfree(op);
		return;
	}
4251

4252
	/*
4253
	 * __qlt_do_work() will call qlt_put_sess() to release
4254 4255 4256 4257 4258 4259
	 * the extra reference taken above by qlt_make_local_sess()
	 */
	__qlt_do_work(cmd);
	kfree(op);
	return;
out_term:
4260
	qlt_send_term_exchange(vha->hw->base_qpair, NULL, &op->atio, 0, 0);
4261
	kfree(op);
4262 4263 4264 4265 4266 4267
}

/* 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)
{
4268
	struct qla_hw_data *ha = vha->hw;
4269
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4270
	struct fc_port *sess;
4271
	struct qla_tgt_cmd *cmd;
4272
	unsigned long flags;
4273 4274

	if (unlikely(tgt->tgt_stop)) {
4275
		ql_dbg(ql_dbg_io, vha, 0x3061,
4276 4277 4278 4279
		    "New command while device %p is shutting down\n", tgt);
		return -EFAULT;
	}

4280 4281 4282 4283 4284 4285 4286 4287
	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));
4288
		op->vha = vha;
4289

4290
		spin_lock_irqsave(&vha->cmd_list_lock, flags);
4291
		list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
4292
		spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4293

4294 4295 4296 4297
		INIT_WORK(&op->work, qlt_create_sess_from_atio);
		queue_work(qla_tgt_wq, &op->work);
		return 0;
	}
4298 4299 4300

	/* Another WWN used to have our s_id. Our PLOGI scheduled its
	 * session deletion, but it's still in sess_del_work wq */
4301
	if (sess->deleted) {
4302
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4303 4304 4305 4306 4307
		    "New command while old session %p is being deleted\n",
		    sess);
		return -EFAULT;
	}

4308 4309 4310
	/*
	 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
	 */
4311
	if (!kref_get_unless_zero(&sess->sess_kref)) {
4312
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4313 4314 4315 4316 4317
		    "%s: kref_get fail, %8phC oxid %x \n",
		    __func__, sess->port_name,
		     be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
		return -EFAULT;
	}
4318 4319

	cmd = qlt_get_tag(vha, sess, atio);
4320
	if (!cmd) {
4321
		ql_dbg(ql_dbg_io, vha, 0x3062,
4322
		    "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4323 4324 4325
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
		ha->tgt.tgt_ops->put_sess(sess);
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4326 4327 4328
		return -ENOMEM;
	}

4329
	cmd->cmd_in_wq = 1;
4330
	cmd->trc_flags |= TRC_NEW_CMD;
4331

4332
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4333
	list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4334
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4335

4336
	INIT_WORK(&cmd->work, qlt_do_work);
4337 4338 4339
	if (vha->flags.qpairs_available) {
		queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
	} else if (ha->msix_count) {
4340 4341 4342 4343 4344 4345 4346 4347 4348
		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);
	}
4349

4350
	return 0;
4351 4352 4353
}

/* ha->hardware_lock supposed to be held on entry */
4354
static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4355 4356 4357 4358 4359
	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;
4360
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379
	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;
4380
	mcmd->reset_count = ha->base_qpair->chip_reset;
4381
	mcmd->qpair = ha->base_qpair;
4382 4383 4384

	switch (fn) {
	case QLA_TGT_LUN_RESET:
4385 4386
	    abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
	    break;
4387 4388
	}

4389
	res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406
	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;
4407
	struct fc_port *sess;
4408
	u64 unpacked_lun;
4409
	int fn;
4410
	unsigned long flags;
4411

4412
	tgt = vha->vha_tgt.qla_tgt;
4413 4414

	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4415 4416

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4417 4418
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    a->u.isp24.fcp_hdr.s_id);
4419 4420
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

4421 4422
	unpacked_lun =
	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4423 4424 4425 4426 4427 4428 4429 4430 4431

	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));
	}

4432
	if (sess->deleted)
4433 4434
		return -EFAULT;

4435 4436 4437 4438 4439
	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,
4440
	struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4441 4442 4443 4444
{
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_mgmt_cmd *mcmd;
4445
	u64 unpacked_lun;
4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460
	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));

4461 4462
	unpacked_lun =
	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4463
	mcmd->reset_count = ha->base_qpair->chip_reset;
4464
	mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4465
	mcmd->qpair = ha->base_qpair;
4466

4467
	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484
	    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;
4485
	struct fc_port *sess;
4486
	int loop_id;
4487
	unsigned long flags;
4488 4489 4490

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

4491
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4492
	sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4493 4494
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

4495 4496 4497 4498
	if (sess == NULL) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
		    "qla_target(%d): task abort for unexisting "
		    "session\n", vha->vp_idx);
4499
		return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4500 4501 4502 4503 4504 4505
		    QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
	}

	return __qlt_abort_task(vha, iocb, sess);
}

4506 4507
void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
{
4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521
	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;
4522 4523 4524 4525 4526 4527 4528 4529 4530
}

/*
* 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.
*/
4531 4532
struct fc_port *
qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4533
    port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4534
{
4535
	struct fc_port *sess = NULL, *other_sess;
4536 4537
	uint64_t other_wwn;

4538 4539
	*conflict_sess = NULL;

4540
	list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4541 4542 4543 4544 4545 4546 4547 4548 4549 4550

		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 */
4551
		if (port_id.b24 == other_sess->d_id.b24) {
4552
			if (loop_id != other_sess->loop_id) {
4553
				ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566
				    "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
4567
				 * kill the session, but don't free the loop_id
4568
				 */
4569
				ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4570 4571 4572 4573
				    "Invalidating sess %p loop_id %d wwn %llx.\n",
				    other_sess, other_sess->loop_id, other_wwn);


4574 4575
				other_sess->keep_nport_handle = 1;
				*conflict_sess = other_sess;
4576 4577 4578 4579 4580 4581 4582
				qlt_schedule_sess_for_deletion(other_sess,
				    true);
			}
			continue;
		}

		/* find other sess with nport handle collision */
4583 4584 4585
		if ((loop_id == other_sess->loop_id) &&
			(loop_id != FC_NO_LOOP_ID)) {
			ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597
			       "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;
}

4598 4599 4600 4601 4602 4603 4604
/* 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;
4605
	unsigned long flags;
4606 4607 4608 4609 4610

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

4611
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4612 4613
	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);
4614

4615 4616 4617 4618 4619
		if (op_key == key) {
			op->aborted = true;
			count++;
		}
	}
4620 4621 4622 4623 4624 4625 4626 4627 4628

	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++;
		}
	}

4629 4630 4631
	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) {
4632
			cmd->aborted = 1;
4633 4634 4635
			count++;
		}
	}
4636
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4637 4638 4639 4640

	return count;
}

4641 4642 4643 4644 4645 4646
/*
 * 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)
{
4647
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4648
	struct qla_hw_data *ha = vha->hw;
4649
	struct fc_port *sess = NULL, *conflict_sess = NULL;
4650 4651 4652 4653
	uint64_t wwn;
	port_id_t port_id;
	uint16_t loop_id;
	uint16_t wd3_lo;
4654
	int res = 0;
4655
	struct qlt_plogi_ack_t *pla;
4656
	unsigned long flags;
4657

4658 4659 4660 4661 4662 4663 4664 4665 4666
	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);

4667 4668 4669 4670 4671 4672
	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);
4673

4674 4675 4676
	/* res = 1 means ack at the end of thread
	 * res = 0 means ack async/later.
	 */
4677 4678
	switch (iocb->u.isp24.status_subcode) {
	case ELS_PLOGI:
4679

4680 4681 4682
		/* Mark all stale commands in qla_tgt_wq for deletion */
		abort_cmds_for_s_id(vha, &port_id);

4683 4684
		if (wwn) {
			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4685 4686
			sess = qlt_find_sess_invalidate_other(vha, wwn,
				port_id, loop_id, &conflict_sess);
4687 4688
			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
		}
4689

4690
		if (IS_SW_RESV_ADDR(port_id)) {
4691 4692 4693 4694
			res = 1;
			break;
		}

4695 4696
		pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
		if (!pla) {
4697 4698 4699 4700 4701 4702
			qlt_send_term_imm_notif(vha, iocb, 1);
			break;
		}

		res = 0;

4703 4704
		if (conflict_sess) {
			conflict_sess->login_gen++;
4705
			qlt_plogi_ack_link(vha, pla, conflict_sess,
4706 4707
				QLT_PLOGI_LINK_CONFLICT);
		}
4708

4709 4710 4711 4712 4713
		if (!sess) {
			pla->ref_count++;
			qla24xx_post_newsess_work(vha, &port_id,
				iocb->u.isp24.port_name, pla);
			res = 0;
4714
			break;
4715
		}
4716 4717

		qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748
		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));

4749 4750 4751
			ql_dbg(ql_dbg_disc, vha, 0x20f9,
			    "%s %d %8phC post del sess\n",
			    __func__, __LINE__, sess->port_name);
4752 4753 4754 4755 4756 4757


			qlt_schedule_sess_for_deletion_lock(sess);
			break;
		}

4758 4759
		break;

4760
	case ELS_PRLI:
4761 4762
		wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);

4763 4764
		if (wwn) {
			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4765 4766
			sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
				loop_id, &conflict_sess);
4767 4768
			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
		}
4769 4770 4771 4772 4773 4774 4775 4776 4777

		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;
		}
4778 4779

		if (sess != NULL) {
4780 4781
			if (sess->fw_login_state != DSC_LS_PLOGI_PEND &&
			    sess->fw_login_state != DSC_LS_PLOGI_COMP) {
4782 4783 4784 4785 4786
				/*
				 * Impatient initiator sent PRLI before last
				 * PLOGI could finish. Will force him to re-try,
				 * while last one finishes.
				 */
4787
				ql_log(ql_log_warn, sess->vha, 0xf095,
4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798
				    "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
			 */
4799
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4800 4801 4802 4803 4804
			    "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;
4805
			sess->d_id = port_id;
4806
			sess->fw_login_state = DSC_LS_PRLI_PEND;
4807 4808 4809 4810

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

4811 4812 4813 4814
			if ((wd3_lo & BIT_4) == 0)
				sess->port_type = FCT_INITIATOR;
			else
				sess->port_type = FCT_TARGET;
4815 4816 4817 4818 4819
		}
		res = 1; /* send notify ack */

		/* Make session global (not used in fabric mode) */
		if (ha->current_topology != ISP_CFG_F) {
4820
			if (sess) {
4821
				ql_dbg(ql_dbg_disc, vha, 0x20fa,
4822 4823 4824 4825 4826 4827 4828 4829 4830 4831
				    "%s %d %8phC post nack\n",
				    __func__, __LINE__, sess->port_name);
				qla24xx_post_nack_work(vha, sess, iocb,
					SRB_NACK_PRLI);
				res = 0;
			} else {
				set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
				set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
				qla2xxx_wake_dpc(vha);
			}
4832
		} else {
4833
			if (sess) {
4834
				ql_dbg(ql_dbg_disc, vha, 0x20fb,
4835 4836
				    "%s %d %8phC post nack\n",
				    __func__, __LINE__, sess->port_name);
4837 4838 4839 4840 4841
				qla24xx_post_nack_work(vha, sess, iocb,
					SRB_NACK_PRLI);
				res = 0;
			}
		}
4842 4843
		break;

4844 4845 4846 4847 4848 4849 4850 4851 4852
	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 */
4853 4854
	case ELS_LOGO:
	case ELS_PRLO:
4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865
		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);
		}

4866
		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4867

4868
		ql_dbg(ql_dbg_disc, vha, 0x20fc,
4869 4870 4871
		    "%s: logo %llx res %d sess %p ",
		    __func__, wwn, res, sess);
		if (res == 0) {
4872 4873 4874 4875
			/*
			 * cmd went upper layer, look for qlt_xmit_tm_rsp()
			 * for LOGO_ACK & sess delete
			 */
4876 4877 4878
			BUG_ON(!sess);
			res = 0;
		} else {
4879
			/* cmd did not go to upper layer. */
4880 4881 4882 4883 4884 4885
			if (sess) {
				qlt_schedule_sess_for_deletion_lock(sess);
				res = 0;
			}
			/* else logo will be ack */
		}
4886 4887 4888 4889
		break;
	case ELS_PDISC:
	case ELS_ADISC:
	{
4890
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4891
		if (tgt->link_reinit_iocb_pending) {
4892 4893
			qlt_send_notify_ack(ha->base_qpair,
			    &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4894 4895
			tgt->link_reinit_iocb_pending = 0;
		}
4896 4897 4898 4899

		sess = qla2x00_find_fcport_by_wwpn(vha,
		    iocb->u.isp24.port_name, 1);
		if (sess) {
4900
			ql_dbg(ql_dbg_disc, vha, 0x20fd,
4901 4902 4903 4904 4905
				"sess %p lid %d|%d DS %d LS %d\n",
				sess, sess->loop_id, loop_id,
				sess->disc_state, sess->fw_login_state);
		}

4906 4907 4908 4909
		res = 1; /* send notify ack */
		break;
	}

4910
	case ELS_FLOGI:	/* should never happen */
4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948
	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:
	{
4949
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4950 4951 4952 4953 4954 4955
		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) {
4956 4957
			qlt_send_notify_ack(ha->base_qpair,
			    &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 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
		}
		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)
5051 5052
		qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
		    0, 0);
5053 5054 5055 5056 5057 5058
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 * This function sends busy to ISP 2xxx or 24xx.
 */
5059
static int __qlt_send_busy(struct qla_qpair *qpair,
5060 5061
	struct atio_from_isp *atio, uint16_t status)
{
5062
	struct scsi_qla_host *vha = qpair->vha;
5063 5064 5065
	struct ctio7_to_24xx *ctio24;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
5066
	struct fc_port *sess = NULL;
5067
	unsigned long flags;
5068
	u16 temp;
5069

5070
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5071 5072
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    atio->u.isp24.fcp_hdr.s_id);
5073
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5074
	if (!sess) {
5075
		qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5076
		return 0;
5077 5078 5079
	}
	/* Sending marker isn't necessary, since we called from ISR */

5080
	pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5081
	if (!pkt) {
5082
		ql_dbg(ql_dbg_io, vha, 0x3063,
5083 5084
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet", vha->vp_idx, __func__);
5085
		return -ENOMEM;
5086 5087
	}

5088
	qpair->tgt_counters.num_q_full_sent++;
5089 5090 5091 5092 5093 5094
	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;
5095
	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5096 5097 5098 5099 5100
	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;
5101
	temp = (atio->u.isp24.attr << 9) |
5102
		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5103 5104
		CTIO7_FLAGS_DONT_RET_CTIO;
	ctio24->u.status1.flags = cpu_to_le16(temp);
5105 5106 5107 5108 5109 5110
	/*
	 * 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);
5111 5112
	/* Memory Barrier */
	wmb();
5113 5114 5115 5116
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130
	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;
5131
	struct fc_port *sess;
5132 5133 5134
	struct se_session *se_sess;
	struct qla_tgt_cmd *cmd;
	int tag;
5135
	unsigned long flags;
5136 5137 5138 5139 5140 5141 5142 5143 5144 5145

	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 >
5146 5147
			vha->qla_stats.stat_max_qfull_cmds_dropped)
			vha->qla_stats.stat_max_qfull_cmds_dropped =
5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177
				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 >
5178 5179
			vha->qla_stats.stat_max_qfull_cmds_dropped)
			vha->qla_stats.stat_max_qfull_cmds_dropped =
5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193
				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;
5194
	cmd->reset_count = ha->base_qpair->chip_reset;
5195
	cmd->q_full = 1;
5196
	cmd->qpair = ha->base_qpair;
5197 5198 5199 5200 5201 5202 5203 5204

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

5205
	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5206 5207 5208 5209
	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 >
5210 5211
		vha->qla_stats.stat_max_qfull_cmds_alloc)
		vha->qla_stats.stat_max_qfull_cmds_alloc =
5212
			vha->hw->tgt.num_qfull_cmds_alloc;
5213
	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5214 5215 5216
}

int
5217
qlt_free_qfull_cmds(struct qla_qpair *qpair)
5218
{
5219
	struct scsi_qla_host *vha = qpair->vha;
5220 5221 5222
	struct qla_hw_data *ha = vha->hw;
	unsigned long flags;
	struct qla_tgt_cmd *cmd, *tcmd;
5223
	struct list_head free_list, q_full_list;
5224 5225 5226 5227 5228 5229
	int rc = 0;

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

	INIT_LIST_HEAD(&free_list);
5230
	INIT_LIST_HEAD(&q_full_list);
5231

5232
	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5233
	if (list_empty(&ha->tgt.q_full_list)) {
5234
		spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5235 5236 5237
		return 0;
	}

5238 5239 5240 5241 5242
	list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);

	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
	list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5243 5244
		if (cmd->q_full)
			/* cmd->state is a borrowed field to hold status */
5245
			rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5246
		else if (cmd->term_exchg)
5247
			rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270

		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--;
	}
5271
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5272 5273 5274 5275 5276 5277 5278 5279 5280 5281

	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);
	}
5282 5283 5284 5285 5286 5287 5288

	if (!list_empty(&q_full_list)) {
		spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
		list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
		spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
	}

5289 5290 5291 5292
	return rc;
}

static void
5293 5294
qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
    uint16_t status)
5295 5296
{
	int rc = 0;
5297
	struct scsi_qla_host *vha = qpair->vha;
5298

5299
	rc = __qlt_send_busy(qpair, atio, status);
5300 5301 5302 5303 5304
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, atio, status, 1);
}

static int
5305 5306
qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
	struct atio_from_isp *atio, uint8_t ha_locked)
5307 5308 5309
{
	struct qla_hw_data *ha = vha->hw;
	uint16_t status;
5310
	unsigned long flags;
5311 5312 5313 5314

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

5315 5316
	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);
5317
	status = temp_sam_status;
5318
	qlt_send_busy(qpair, atio, status);
5319 5320 5321
	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

5322
	return 1;
5323 5324 5325 5326 5327
}

/* 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,
5328
	struct atio_from_isp *atio, uint8_t ha_locked)
5329 5330
{
	struct qla_hw_data *ha = vha->hw;
5331
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5332
	int rc;
5333
	unsigned long flags;
5334 5335

	if (unlikely(tgt == NULL)) {
5336
		ql_dbg(ql_dbg_tgt, vha, 0x3064,
5337 5338 5339 5340 5341 5342 5343 5344
		    "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.
	 */

5345
	tgt->atio_irq_cmd_count++;
5346 5347 5348 5349 5350

	switch (atio->u.raw.entry_type) {
	case ATIO_TYPE7:
		if (unlikely(atio->u.isp24.exchange_addr ==
		    ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5351
			ql_dbg(ql_dbg_io, vha, 0x3065,
5352 5353 5354
			    "qla_target(%d): ATIO_TYPE7 "
			    "received with UNKNOWN exchange address, "
			    "sending QUEUE_FULL\n", vha->vp_idx);
5355 5356
			if (!ha_locked)
				spin_lock_irqsave(&ha->hardware_lock, flags);
5357 5358
			qlt_send_busy(ha->base_qpair, atio,
			    SAM_STAT_TASK_SET_FULL);
5359
			if (!ha_locked)
5360 5361
				spin_unlock_irqrestore(&ha->hardware_lock,
				    flags);
5362 5363
			break;
		}
5364 5365

		if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5366 5367
			rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
			    atio, ha_locked);
5368
			if (rc != 0) {
5369
				tgt->atio_irq_cmd_count--;
5370 5371
				return;
			}
5372
			rc = qlt_handle_cmd_for_atio(vha, atio);
5373
		} else {
5374
			rc = qlt_handle_task_mgmt(vha, atio);
5375
		}
5376 5377
		if (unlikely(rc != 0)) {
			if (rc == -ESRCH) {
5378
				if (!ha_locked)
5379 5380
					spin_lock_irqsave(&ha->hardware_lock,
					    flags);
5381

5382
#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5383 5384
				qlt_send_busy(ha->base_qpair, atio,
				    SAM_STAT_BUSY);
5385
#else
5386 5387
				qlt_send_term_exchange(ha->base_qpair, NULL,
				    atio, 1, 0);
5388
#endif
5389
				if (!ha_locked)
5390 5391
					spin_unlock_irqrestore(
					    &ha->hardware_lock, flags);
5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402
			} 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);
5403 5404 5405
					if (!ha_locked)
						spin_lock_irqsave(
						    &ha->hardware_lock, flags);
5406 5407
					qlt_send_busy(ha->base_qpair,
					    atio, SAM_STAT_BUSY);
5408 5409 5410
					if (!ha_locked)
						spin_unlock_irqrestore(
						    &ha->hardware_lock, flags);
5411 5412 5413 5414 5415 5416 5417 5418 5419 5420 5421 5422 5423 5424 5425 5426
				}
			}
		}
		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");
5427 5428 5429

		if (!ha_locked)
			spin_lock_irqsave(&ha->hardware_lock, flags);
5430
		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5431 5432
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
5433 5434 5435 5436 5437 5438 5439 5440 5441 5442
		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;
	}

5443
	tgt->atio_irq_cmd_count--;
5444 5445 5446 5447
}

/* ha->hardware_lock supposed to be held on entry */
/* called via callback from qla2xxx */
5448 5449
static void qlt_response_pkt(struct scsi_qla_host *vha,
	struct rsp_que *rsp, response_t *pkt)
5450
{
5451
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5452 5453 5454

	if (unlikely(tgt == NULL)) {
		ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5455 5456
		    "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
		    vha->vp_idx, pkt->entry_type, vha->hw);
5457 5458 5459 5460 5461 5462 5463 5464 5465
		return;
	}

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

	switch (pkt->entry_type) {
5466
	case CTIO_CRC2:
5467 5468 5469
	case CTIO_TYPE7:
	{
		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5470
		qlt_do_ctio_completion(vha, rsp, entry->handle,
5471 5472 5473 5474 5475 5476 5477 5478 5479 5480
		    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 !=
5481
		    cpu_to_le16(ATIO_CDB_VALID)) {
5482 5483 5484 5485 5486 5487 5488
			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;
		}

5489
		rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5490
		if (rc != 0)
5491 5492
			return;

5493 5494 5495 5496
		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 */
5497
				qlt_send_busy(rsp->qpair, atio, 0);
5498
#else
5499
				qlt_send_term_exchange(rsp->qpair, NULL, atio, 1, 0);
5500 5501 5502 5503 5504 5505 5506
#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");
5507
					qlt_send_term_exchange(rsp->qpair, NULL,
5508
					    atio, 1, 0);
5509 5510 5511 5512 5513
				} else {
					ql_dbg(ql_dbg_tgt, vha, 0xe060,
					    "qla_target(%d): Unable to send "
					    "command to target, sending BUSY "
					    "status\n", vha->vp_idx);
5514
					qlt_send_busy(rsp->qpair, atio, 0);
5515 5516 5517 5518 5519 5520 5521 5522 5523
				}
			}
		}
	}
	break;

	case CONTINUE_TGT_IO_TYPE:
	{
		struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5524
		qlt_do_ctio_completion(vha, rsp, entry->handle,
5525 5526 5527 5528 5529 5530 5531 5532
		    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;
5533
		qlt_do_ctio_completion(vha, rsp, entry->handle,
5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552
		    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 !=
5553
			    cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5554 5555 5556 5557 5558 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 5612 5613 5614 5615 5616 5617 5618 5619 5620 5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631
				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;
	}

}

/*
 * 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;
5632
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5633
	int login_code;
5634

5635
	if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653
		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.
	 */


	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 "
5654
		    "occurred", vha->vp_idx, code);
5655 5656 5657 5658 5659 5660 5661 5662
		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,
5663
		    "qla_target(%d): Async LOOP_UP occurred "
5664 5665 5666
		    "(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]));
5667
		if (tgt->link_reinit_iocb_pending) {
5668 5669
			qlt_send_notify_ack(ha->base_qpair,
			    (void *)&tgt->link_reinit_iocb,
5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680
			    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,
5681
		    "qla_target(%d): Async event %#x occurred "
5682 5683 5684
		    "(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]));
5685 5686
		break;

5687
	case MBA_REJECTED_FCP_CMD:
5688 5689 5690 5691 5692
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
		    "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]));
5693 5694 5695 5696 5697

		if (le16_to_cpu(mailbox[3]) == 1) {
			/* exchange starvation. */
			vha->hw->exch_starvation++;
			if (vha->hw->exch_starvation > 5) {
5698
				ql_log(ql_log_warn, vha, 0xd03a,
5699 5700 5701 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712
				    "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;

5713 5714 5715
	case MBA_PORT_UPDATE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
		    "qla_target(%d): Port update async event %#x "
5716
		    "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5717 5718 5719 5720 5721
		    "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]);
5722
		if (login_code == 0x4) {
5723 5724
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
			    "Async MB 2: Got PLOGI Complete\n");
5725 5726
			vha->hw->exch_starvation = 0;
		} else if (login_code == 0x7)
5727 5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
			    "Async MB 2: Port Logged Out\n");
		break;
	default:
		break;
	}

}

static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
	uint16_t loop_id)
{
5739
	fc_port_t *fcport, *tfcp, *del;
5740
	int rc;
5741 5742
	unsigned long flags;
	u8 newfcport = 0;
5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753

	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;

5754
	rc = qla24xx_gpdb_wait(vha, fcport, 0);
5755 5756 5757 5758 5759 5760 5761 5762 5763
	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;
	}

5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796
	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) {
5797
				ql_dbg(ql_dbg_disc, vha, 0x20fe,
5798 5799 5800 5801
				   "%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 {
5802
				ql_dbg(ql_dbg_disc, vha, 0x20ff,
5803 5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816
				   "%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);

5817 5818 5819 5820
	return fcport;
}

/* Must be called under tgt_mutex */
5821
static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5822 5823
	uint8_t *s_id)
{
5824
	struct fc_port *sess = NULL;
5825 5826 5827 5828
	fc_port_t *fcport = NULL;
	int rc, global_resets;
	uint16_t loop_id = 0;

5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839
	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;
	}

5840 5841
	mutex_lock(&vha->vha_tgt.tgt_mutex);

5842
retry:
5843 5844
	global_resets =
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5845 5846 5847

	rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
	if (rc != 0) {
5848 5849
		mutex_unlock(&vha->vha_tgt.tgt_mutex);

5850 5851 5852 5853 5854
		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]);
5855 5856 5857 5858 5859 5860 5861 5862

		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);
		}

5863 5864 5865 5866
		return NULL;
	}

	fcport = qlt_get_port_database(vha, loop_id);
5867 5868
	if (!fcport) {
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
5869
		return NULL;
5870
	}
5871 5872

	if (global_resets !=
5873
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5874 5875 5876 5877
		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,
5878 5879
		    atomic_read(&vha->vha_tgt.
			qla_tgt->tgt_global_resets_count));
5880 5881 5882 5883 5884
		goto retry;
	}

	sess = qlt_create_sess(vha, fcport, true);

5885 5886
	mutex_unlock(&vha->vha_tgt.tgt_mutex);

5887 5888 5889 5890 5891 5892 5893 5894
	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;
5895
	struct fc_port *sess = NULL;
5896
	unsigned long flags = 0, flags2 = 0;
5897 5898 5899 5900
	uint32_t be_s_id;
	uint8_t s_id[3];
	int rc;

5901
	spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5902 5903

	if (tgt->tgt_stop)
5904
		goto out_term2;
5905 5906 5907 5908 5909 5910 5911 5912

	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) {
5913
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5914 5915 5916 5917

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

5918
		spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5919
		if (!sess)
5920
			goto out_term2;
5921
	} else {
5922
		if (sess->deleted) {
5923
			sess = NULL;
5924
			goto out_term2;
5925 5926
		}

5927
		if (!kref_get_unless_zero(&sess->sess_kref)) {
5928
			ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
5929 5930 5931 5932 5933
			    "%s: kref_get fail %8phC \n",
			     __func__, sess->port_name);
			sess = NULL;
			goto out_term2;
		}
5934 5935 5936
	}

	rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5937 5938 5939
	ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);

5940 5941 5942 5943
	if (rc != 0)
		goto out_term;
	return;

5944
out_term2:
5945 5946 5947
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5948

5949
out_term:
5950
	spin_lock_irqsave(&ha->hardware_lock, flags);
5951 5952
	qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
	    FCP_TMF_REJECTED, false);
5953
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
5954 5955 5956 5957 5958 5959 5960 5961
}

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;
5962
	struct fc_port *sess = NULL;
5963 5964 5965
	unsigned long flags;
	uint8_t *s_id = NULL; /* to hide compiler warnings */
	int rc;
5966
	u64 unpacked_lun;
5967
	int fn;
5968 5969
	void *iocb;

5970
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5971 5972

	if (tgt->tgt_stop)
5973
		goto out_term2;
5974 5975 5976 5977

	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) {
5978
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5979 5980 5981 5982

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

5983
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5984
		if (!sess)
5985
			goto out_term2;
5986
	} else {
5987
		if (sess->deleted) {
5988
			sess = NULL;
5989
			goto out_term2;
5990 5991
		}

5992
		if (!kref_get_unless_zero(&sess->sess_kref)) {
5993
			ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
5994 5995 5996
			    "%s: kref_get fail %8phC\n",
			     __func__, sess->port_name);
			sess = NULL;
5997
			goto out_term2;
5998
		}
5999 6000 6001 6002
	}

	iocb = a;
	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6003 6004
	unpacked_lun =
	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6005 6006

	rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6007
	ha->tgt.tgt_ops->put_sess(sess);
6008
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6009 6010 6011

	if (rc != 0)
		goto out_term;
6012 6013
	return;

6014 6015 6016 6017
out_term2:
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6018
out_term:
6019
	qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066
}

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;
6067 6068
	int rc, i;
	struct qla_qpair_hint *h;
6069 6070 6071 6072

	if (!QLA_TGT_MODE_ENABLED())
		return 0;

6073 6074 6075 6076 6077 6078
	if (!IS_TGT_MODE_CAPABLE(ha)) {
		ql_log(ql_log_warn, base_vha, 0xe070,
		    "This adapter does not support target mode.\n");
		return 0;
	}

6079
	ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6080
	    "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6081

6082
	BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6083 6084 6085 6086 6087 6088 6089 6090

	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;
	}

6091 6092 6093 6094 6095 6096 6097 6098 6099
	tgt->qphints = kzalloc((ha->max_qpairs + 1) *
	    sizeof(struct qla_qpair_hint), GFP_KERNEL);
	if (!tgt->qphints) {
		kfree(tgt);
		ql_log(ql_log_warn, base_vha, 0x0197,
		    "Unable to allocate qpair hints.\n");
		return -ENOMEM;
	}

6100 6101 6102
	if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
		base_vha->host->hostt->supported_mode |= MODE_TARGET;

6103 6104 6105 6106 6107 6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131
	rc = btree_init64(&tgt->lun_qpair_map);
	if (rc) {
		kfree(tgt->qphints);
		kfree(tgt);
		ql_log(ql_log_info, base_vha, 0x0198,
			"Unable to initialize lun_qpair_map btree\n");
		return -EIO;
	}
	h = &tgt->qphints[0];
	h->qpair = ha->base_qpair;
	INIT_LIST_HEAD(&h->hint_elem);
	h->cpuid = ha->base_qpair->cpuid;
	list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);

	for (i = 0; i < ha->max_qpairs; i++) {
		unsigned long flags;

		struct qla_qpair *qpair = ha->queue_pair_map[i];
		h = &tgt->qphints[i + 1];
		INIT_LIST_HEAD(&h->hint_elem);
		if (qpair) {
			h->qpair = qpair;
			spin_lock_irqsave(qpair->qp_lock_ptr, flags);
			list_add_tail(&h->hint_elem, &qpair->hints_list);
			spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
			h->cpuid = qpair->cpuid;
		}
	}

6132 6133 6134 6135 6136 6137 6138 6139 6140
	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);

6141
	base_vha->vha_tgt.qla_tgt = tgt;
6142 6143 6144 6145 6146 6147 6148 6149 6150 6151 6152

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

	mutex_lock(&qla_tgt_mutex);
	list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
	mutex_unlock(&qla_tgt_mutex);

6153 6154 6155
	if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
		ha->tgt.tgt_ops->add_target(base_vha);

6156 6157 6158 6159 6160 6161
	return 0;
}

/* Must be called under tgt_host_action_mutex */
int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
{
6162
	if (!vha->vha_tgt.qla_tgt)
6163 6164
		return 0;

6165 6166 6167 6168
	if (vha->fc_vport) {
		qlt_release(vha->vha_tgt.qla_tgt);
		return 0;
	}
6169 6170 6171 6172

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

6173
	mutex_lock(&qla_tgt_mutex);
6174
	list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6175 6176 6177 6178
	mutex_unlock(&qla_tgt_mutex);

	ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
	    vha->host_no, ha);
6179
	qlt_release(vha->vha_tgt.qla_tgt);
6180 6181 6182 6183

	return 0;
}

6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194
void qlt_remove_target_resources(struct qla_hw_data *ha)
{
	struct scsi_qla_host *node;
	u32 key = 0;

	btree_for_each_safe32(&ha->tgt.host_map, key, node)
		btree_remove32(&ha->tgt.host_map, key);

	btree_destroy32(&ha->tgt.host_map);
}

6195 6196 6197 6198 6199 6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223
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
 */
6224 6225 6226
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))
6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246 6247 6248
{
	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);
6249
		if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6250 6251 6252 6253 6254
			pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
			    host->host_no);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			continue;
		}
6255 6256 6257 6258 6259 6260
		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;
		}
6261 6262 6263 6264 6265 6266 6267 6268
		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;
		}
6269
		qlt_lport_dump(vha, phys_wwpn, b);
6270 6271 6272 6273 6274

		if (memcmp(vha->port_name, b, WWN_SIZE)) {
			scsi_host_put(host);
			continue;
		}
6275 6276 6277 6278
		rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
		if (rc != 0)
			scsi_host_put(host);

6279
		mutex_unlock(&qla_tgt_mutex);
6280 6281 6282 6283 6284 6285 6286 6287 6288 6289 6290 6291 6292 6293 6294 6295 6296 6297 6298 6299
		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
	 */
6300
	vha->vha_tgt.target_lport_ptr = NULL;
6301 6302 6303 6304 6305 6306 6307 6308 6309
	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 */
6310
static void qlt_set_mode(struct scsi_qla_host *vha)
6311 6312 6313 6314 6315 6316 6317
{
	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:
6318 6319 6320 6321
		vha->host->active_mode = MODE_UNKNOWN;
		break;
	case QLA2XXX_INI_MODE_DUAL:
		vha->host->active_mode = MODE_DUAL;
6322 6323 6324 6325 6326 6327 6328
		break;
	default:
		break;
	}
}

/* Must be called under HW lock */
6329
static void qlt_clear_mode(struct scsi_qla_host *vha)
6330 6331 6332 6333 6334 6335 6336 6337 6338
{
	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:
6339 6340
	case QLA2XXX_INI_MODE_DUAL:
		vha->host->active_mode = MODE_INITIATOR;
6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353 6354 6355
		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;
6356
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6357
	unsigned long flags;
6358
	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372

	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);

6373 6374 6375 6376 6377 6378 6379 6380
	if (vha->vp_idx) {
		qla24xx_disable_vp(vha);
		qla24xx_enable_vp(vha);
	} else {
		set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
		qla2xxx_wake_dpc(base_vha);
		qla2x00_wait_for_hba_online(base_vha);
	}
6381 6382 6383 6384 6385 6386 6387 6388
}
EXPORT_SYMBOL(qlt_enable_vha);

/*
 * qla_tgt_disable_vha - NO LOCK HELD
 *
 * Disable Target Mode and reset the adapter
 */
6389
static void qlt_disable_vha(struct scsi_qla_host *vha)
6390 6391
{
	struct qla_hw_data *ha = vha->hw;
6392
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6393 6394 6395 6396 6397 6398 6399 6400 6401 6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419
	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)
{
6420 6421 6422 6423
	vha->vha_tgt.qla_tgt = NULL;

	mutex_init(&vha->vha_tgt.tgt_mutex);
	mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6424 6425 6426 6427 6428 6429 6430 6431 6432 6433

	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;
6434 6435

	qlt_add_target(ha, vha);
6436 6437 6438 6439 6440 6441 6442 6443 6444
}

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)) {
6445
		ct_req->req.rff_id.fc4_feature = BIT_0;
6446 6447
	} else if (qla_ini_mode_enabled(vha)) {
		ct_req->req.rff_id.fc4_feature = BIT_1;
6448 6449
	} else if (qla_dual_mode_enabled(vha))
		ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6450 6451 6452 6453 6454 6455 6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467
}

/*
 * 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;

6468
	if (qla_ini_mode_enabled(vha))
6469 6470 6471 6472 6473 6474 6475 6476 6477 6478 6479 6480 6481 6482
		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
6483
qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6484 6485 6486 6487 6488
{
	struct qla_hw_data *ha = vha->hw;
	struct atio_from_isp *pkt;
	int cnt, i;

6489
	if (!ha->flags.fw_started)
6490 6491
		return;

6492 6493
	while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
	    fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6494 6495 6496
		pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
		cnt = pkt->u.raw.entry_count;

6497 6498 6499 6500 6501 6502
		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.
			 */
6503
			ql_log(ql_log_warn, vha, 0xd03c,
6504 6505 6506 6507 6508 6509
			    "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);
6510 6511
			qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
			    ha_locked, 0);
6512 6513 6514 6515
		} else {
			qlt_24xx_atio_pkt_all_vps(vha,
			    (struct atio_from_isp *)pkt, ha_locked);
		}
6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531

		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 */
6532
	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6533 6534 6535
}

void
6536
qlt_24xx_config_rings(struct scsi_qla_host *vha)
6537 6538
{
	struct qla_hw_data *ha = vha->hw;
6539 6540
	if (!QLA_TGT_MODE_ENABLED())
		return;
6541

6542 6543 6544 6545 6546 6547 6548 6549 6550 6551 6552 6553
	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);
6554 6555 6556 6557 6558 6559 6560
	}
}

void
qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
{
	struct qla_hw_data *ha = vha->hw;
6561 6562 6563

	if (!QLA_TGT_MODE_ENABLED())
		return;
6564

6565
	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577
		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;
		}

6578
		if (qla_tgt_mode_enabled(vha))
6579
			nv->exchange_count = cpu_to_le16(0xFFFF);
6580 6581
		else			/* dual */
			nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6582 6583

		/* Enable target mode */
6584
		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6585 6586

		/* Disable ini mode, if requested */
6587
		if (qla_tgt_mode_enabled(vha))
6588
			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6589 6590

		/* Disable Full Login after LIP */
6591
		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6592
		/* Enable initial LIP */
6593
		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6594 6595 6596 6597 6598 6599 6600
		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);

6601
		/* Disable Full Login after LIP */
6602
		nv->host_p &= cpu_to_le32(~BIT_10);
6603 6604 6605 6606 6607 6608 6609

		/*
		 * 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);
6610
		/* Enable target PRLI control */
6611
		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6612 6613 6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624
	} 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;
	}

6625
	if (ha->base_qpair->enable_class_2) {
6626 6627 6628 6629
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) =
				FC_COS_CLASS2 | FC_COS_CLASS3;

6630
		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6631 6632 6633 6634
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

6635
		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6636 6637 6638 6639 6640 6641 6642 6643 6644
	}
}

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

Q
Quinn Tran 已提交
6645 6646 6647
	if (!QLA_TGT_MODE_ENABLED())
		return;

6648 6649
	if (ha->tgt.node_name_set) {
		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6650
		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6651
	}
Q
Quinn Tran 已提交
6652 6653 6654 6655 6656 6657 6658 6659

	/* 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);
	}
6660 6661
}

6662 6663 6664 6665 6666 6667 6668 6669
void
qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
{
	struct qla_hw_data *ha = vha->hw;

	if (!QLA_TGT_MODE_ENABLED())
		return;

6670
	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682
		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;
		}

6683
		if (qla_tgt_mode_enabled(vha))
6684
			nv->exchange_count = cpu_to_le16(0xFFFF);
6685 6686
		else			/* dual */
			nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6687 6688

		/* Enable target mode */
6689
		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6690 6691

		/* Disable ini mode, if requested */
6692
		if (qla_tgt_mode_enabled(vha))
6693
			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6694
		/* Disable Full Login after LIP */
6695
		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6696
		/* Enable initial LIP */
6697
		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6698 6699 6700 6701 6702 6703 6704
		/*
		 * 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);
6705 6706 6707 6708 6709 6710 6711
		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);

6712
		/* Disable Full Login after LIP */
6713
		nv->host_p &= cpu_to_le32(~BIT_10);
6714
		/* Enable target PRLI control */
6715
		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728
	} 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;
	}

6729
	if (ha->base_qpair->enable_class_2) {
6730 6731 6732 6733
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) =
				FC_COS_CLASS2 | FC_COS_CLASS3;

6734
		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6735 6736 6737 6738
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

6739
		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753
	}
}

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);
6754
		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6755
	}
Q
Quinn Tran 已提交
6756 6757 6758 6759 6760 6761 6762 6763 6764

	/* 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);
	}

6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775
}

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

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

6776 6777 6778 6779 6780

void
qlt_modify_vp_config(struct scsi_qla_host *vha,
	struct vp_config_entry_24xx *vpmod)
{
6781 6782
	/* enable target mode.  Bit5 = 1 => disable */
	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6783
		vpmod->options_idx1 &= ~BIT_5;
6784

6785
	/* Disable ini mode, if requested.  bit4 = 1 => disable */
6786
	if (qla_tgt_mode_enabled(vha))
6787 6788 6789 6790 6791 6792
		vpmod->options_idx1 &= ~BIT_4;
}

void
qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
{
6793 6794
	int rc;

6795 6796 6797
	if (!QLA_TGT_MODE_ENABLED())
		return;

6798
	if  (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6799 6800 6801 6802 6803 6804 6805
		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;
	}

6806 6807
	mutex_init(&base_vha->vha_tgt.tgt_mutex);
	mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6808 6809 6810 6811 6812

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

6813
	qlt_clear_mode(base_vha);
6814 6815 6816

	rc = btree_init32(&ha->tgt.host_map);
	if (rc)
6817
		ql_log(ql_log_info, base_vha, 0xd03d,
6818 6819 6820
		    "Unable to initialize ha->host_map btree\n");

	qlt_update_vp_map(base_vha, SET_VP_IDX);
6821 6822
}

6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834
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);

6835
	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6836

6837
	qlt_24xx_process_atio_queue(vha, 0);
6838

6839
	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6840 6841 6842 6843

	return IRQ_HANDLED;
}

6844 6845 6846 6847 6848 6849 6850 6851 6852
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;

6853 6854
	if (qla2x00_reset_active(vha) ||
	    (op->chip_reset != ha->base_qpair->chip_reset))
6855 6856 6857 6858 6859 6860 6861
		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);
6862
	qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
6863
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6864 6865

	kfree(op);
6866 6867 6868
}

void
6869 6870
qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
    response_t *pkt)
6871 6872 6873 6874 6875 6876 6877 6878 6879
{
	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.
		 */
6880
		qlt_response_pkt_all_vps(vha, rsp, pkt);
6881 6882 6883 6884 6885
		return;
	}

	memcpy(&op->atio, pkt, sizeof(*pkt));
	op->vha = vha;
6886
	op->chip_reset = vha->hw->base_qpair->chip_reset;
6887
	op->rsp = rsp;
6888 6889 6890 6891 6892
	INIT_WORK(&op->work, qlt_handle_abts_recv_work);
	queue_work(qla_tgt_wq, &op->work);
	return;
}

6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913 6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931
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)
{
6932 6933 6934 6935
	void *slot;
	u32 key;
	int rc;

6936 6937 6938
	if (!QLA_TGT_MODE_ENABLED())
		return;

6939 6940
	key = vha->d_id.b24;

6941 6942 6943 6944 6945
	switch (cmd) {
	case SET_VP_IDX:
		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
		break;
	case SET_AL_PA:
6946 6947
		slot = btree_lookup32(&vha->hw->tgt.host_map, key);
		if (!slot) {
6948
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
6949 6950 6951 6952
			    "Save vha in host_map %p %06x\n", vha, key);
			rc = btree_insert32(&vha->hw->tgt.host_map,
				key, vha, GFP_ATOMIC);
			if (rc)
6953
				ql_log(ql_log_info, vha, 0xd03e,
6954 6955 6956 6957
				    "Unable to insert s_id into host_map: %06x\n",
				    key);
			return;
		}
6958 6959
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
		    "replace existing vha in host_map %p %06x\n", vha, key);
6960
		btree_update32(&vha->hw->tgt.host_map, key, vha);
6961 6962 6963 6964 6965
		break;
	case RESET_VP_IDX:
		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
		break;
	case RESET_AL_PA:
6966
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
6967 6968 6969 6970 6971
		   "clear vha in host_map %p %06x\n", vha, key);
		slot = btree_lookup32(&vha->hw->tgt.host_map, key);
		if (slot)
			btree_remove32(&vha->hw->tgt.host_map, key);
		vha->d_id.b24 = 0;
6972 6973 6974 6975
		break;
	}
}

6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994
void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
{
	unsigned long flags;
	struct qla_hw_data *ha = vha->hw;

	if (!vha->d_id.b24) {
		spin_lock_irqsave(&ha->vport_slock, flags);
		vha->d_id = id;
		qlt_update_vp_map(vha, SET_AL_PA);
		spin_unlock_irqrestore(&ha->vport_slock, flags);
	} else if (vha->d_id.b24 != id.b24) {
		spin_lock_irqsave(&ha->vport_slock, flags);
		qlt_update_vp_map(vha, RESET_AL_PA);
		vha->d_id = id;
		qlt_update_vp_map(vha, SET_AL_PA);
		spin_unlock_irqrestore(&ha->vport_slock, flags);
	}
}

6995 6996 6997 6998 6999 7000 7001 7002
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;
7003 7004
	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
		ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7005 7006 7007 7008 7009 7010 7011 7012 7013 7014 7015 7016 7017 7018 7019 7020 7021 7022 7023 7024 7025 7026 7027
	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) {
7028
		ql_log(ql_log_fatal, NULL, 0xd04b,
7029
		    "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7030
		return -ENOMEM;
7031 7032
	}

7033
	qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7034 7035
	    sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
	    0, NULL);
7036 7037 7038 7039 7040 7041 7042 7043

	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;
	}

7044 7045 7046 7047 7048 7049
	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;
7050
		goto out_plogi_cachep;
7051 7052 7053 7054 7055 7056 7057 7058 7059 7060 7061 7062 7063 7064 7065 7066
	}

	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);
7067 7068
out_plogi_cachep:
	kmem_cache_destroy(qla_tgt_plogi_cachep);
7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080
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);
7081
	kmem_cache_destroy(qla_tgt_plogi_cachep);
7082 7083
	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
}