qla_target.c 186.6 KB
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/*
 *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
 *
 *  based on qla2x00t.c code:
 *
 *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
 *  Copyright (C) 2004 - 2005 Leonid Stoljar
 *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
 *  Copyright (C) 2006 - 2010 ID7 Ltd.
 *
 *  Forward port and refactoring to modern qla2xxx and target/configfs
 *
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 *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
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 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation, version 2
 *  of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/workqueue.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>

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

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

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static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
module_param(qlini_mode, charp, S_IRUGO);
MODULE_PARM_DESC(qlini_mode,
	"Determines when initiator mode will be enabled. Possible values: "
	"\"exclusive\" - initiator mode will be enabled on load, "
	"disabled on enabling target mode and then on disabling target mode "
	"enabled back; "
	"\"disabled\" - initiator mode will never be enabled; "
	"\"enabled\" (default) - initiator mode will always stay enabled.");

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int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
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static int temp_sam_status = SAM_STAT_BUSY;

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/*
 * From scsi/fc/fc_fcp.h
 */
enum fcp_resp_rsp_codes {
	FCP_TMF_CMPL = 0,
	FCP_DATA_LEN_INVALID = 1,
	FCP_CMND_FIELDS_INVALID = 2,
	FCP_DATA_PARAM_MISMATCH = 3,
	FCP_TMF_REJECTED = 4,
	FCP_TMF_FAILED = 5,
	FCP_TMF_INVALID_LUN = 9,
};

/*
 * fc_pri_ta from scsi/fc/fc_fcp.h
 */
#define FCP_PTA_SIMPLE      0   /* simple task attribute */
#define FCP_PTA_HEADQ       1   /* head of queue task attribute */
#define FCP_PTA_ORDERED     2   /* ordered task attribute */
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#define FCP_PTA_ACA         4   /* auto. contingent allegiance */
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#define FCP_PTA_MASK        7   /* mask for task attribute field */
#define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
#define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */

/*
 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
 * must be called under HW lock and could unlock/lock it inside.
 * It isn't an issue, since in the current implementation on the time when
 * those functions are called:
 *
 *   - Either context is IRQ and only IRQ handler can modify HW data,
 *     including rings related fields,
 *
 *   - Or access to target mode variables from struct qla_tgt doesn't
 *     cross those functions boundaries, except tgt_stop, which
 *     additionally protected by irq_cmd_count.
 */
/* Predefs for callbacks handed to qla2xxx LLD */
static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
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	struct atio_from_isp *pkt, uint8_t);
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static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
	int fn, void *iocb, int flags);
static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
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	*cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
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static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
	struct qla_tgt_srr_imm *imm, int ha_lock);
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static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
	struct qla_tgt_cmd *cmd);
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static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
	struct atio_from_isp *atio, uint16_t status, int qfull);
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static void qlt_disable_vha(struct scsi_qla_host *vha);
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static void qlt_clear_tgt_db(struct qla_tgt *tgt);
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static void qlt_send_notify_ack(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *ntfy,
	uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
	uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
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static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *imm, int ha_locked);
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/*
 * Global Variables
 */
static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
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static struct kmem_cache *qla_tgt_plogi_cachep;
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static mempool_t *qla_tgt_mgmt_cmd_mempool;
static struct workqueue_struct *qla_tgt_wq;
static DEFINE_MUTEX(qla_tgt_mutex);
static LIST_HEAD(qla_tgt_glist);

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

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/* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
static struct qla_tgt_sess *qlt_find_sess_by_port_name(
	struct qla_tgt *tgt,
	const uint8_t *port_name)
{
	struct qla_tgt_sess *sess;

	list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
		if (!memcmp(sess->port_name, port_name, WWN_SIZE))
			return sess;
	}

	return NULL;
}

/* Might release hw lock, then reaquire!! */
static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
{
	/* Send marker if required */
	if (unlikely(vha->marker_needed != 0)) {
		int rc = qla2x00_issue_marker(vha, vha_locked);
		if (rc != QLA_SUCCESS) {
			ql_dbg(ql_dbg_tgt, vha, 0xe03d,
			    "qla_target(%d): issue_marker() failed\n",
			    vha->vp_idx);
		}
		return rc;
	}
	return QLA_SUCCESS;
}

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

	if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
		return NULL;

	if (vha->d_id.b.al_pa == d_id[2])
		return vha;

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

	return NULL;
}

static inline
struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
	uint16_t vp_idx)
{
	struct qla_hw_data *ha = vha->hw;

	if (vha->vp_idx == vp_idx)
		return vha;

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

	return NULL;
}

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

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

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

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

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

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

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

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

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	return false;
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}

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

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

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

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

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

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

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

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

}

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/*
 * All qlt_plogi_ack_t operations are protected by hardware_lock
 */

/*
 * 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
 */
static qlt_plogi_ack_t *
qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
		       struct imm_ntfy_from_isp *iocb)
{
	qlt_plogi_ack_t *pla;

	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);
			pla->iocb = *iocb;
			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;
	}

	pla->iocb = *iocb;
	pla->id = *id;
	list_add_tail(&pla->list, &vha->plogi_ack_list);

	return pla;
}

static void qlt_plogi_ack_unref(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla)
{
	BUG_ON(!pla->ref_count);
	pla->ref_count--;

	if (pla->ref_count)
		return;

	ql_dbg(ql_dbg_async, vha, 0x5089,
	    "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
	    " exch %#x ox_id %#x\n", pla->iocb.u.isp24.port_name,
	    pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1],
	    pla->iocb.u.isp24.port_id[0],
	    le16_to_cpu(pla->iocb.u.isp24.nport_handle),
	    pla->iocb.u.isp24.exchange_address, pla->iocb.ox_id);
	qlt_send_notify_ack(vha, &pla->iocb, 0, 0, 0, 0, 0, 0);

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

static void
qlt_plogi_ack_link(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla,
    struct qla_tgt_sess *sess, qlt_plogi_link_t link)
{
	/* Inc ref_count first because link might already be pointing at pla */
	pla->ref_count++;

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

	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\n", sess, link, sess->port_name,
	    pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2],
	    pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0],
	    pla->ref_count);

	sess->plogi_link[link] = pla;
}

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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);

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	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);
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}

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static void qlt_free_session_done(struct work_struct *work)
{
	struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
	    free_work);
	struct qla_tgt *tgt = sess->tgt;
	struct scsi_qla_host *vha = sess->vha;
	struct qla_hw_data *ha = vha->hw;
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	unsigned long flags;
	bool logout_started = false;
	fc_port_t fcport;

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
		"%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
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		" s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
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		__func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
		sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
		sess->logout_on_delete, sess->keep_nport_handle,
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		sess->send_els_logo);
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	BUG_ON(!tgt);
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	if (sess->send_els_logo) {
		qlt_port_logo_t logo;
		logo.id = sess->s_id;
		logo.cmd_count = 0;
		qlt_send_first_logo(vha, &logo);
	}

548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566
	if (sess->logout_on_delete) {
		int rc;

		memset(&fcport, 0, sizeof(fcport));
		fcport.loop_id = sess->loop_id;
		fcport.d_id = sess->s_id;
		memcpy(fcport.port_name, sess->port_name, WWN_SIZE);
		fcport.vha = vha;
		fcport.tgt_session = sess;

		rc = qla2x00_post_async_logout_work(vha, &fcport, 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;
	}

567 568 569 570 571 572
	/*
	 * Release the target session for FC Nexus from fabric module code.
	 */
	if (sess->se_sess != NULL)
		ha->tgt.tgt_ops->free_session(sess);

573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592
	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);
		}

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
			"%s: sess %p logout completed\n",
			__func__, sess);
	}

	spin_lock_irqsave(&ha->hardware_lock, flags);

593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620
	{
		qlt_plogi_ack_t *own =
		    sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
		qlt_plogi_ack_t *con =
		    sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];

		if (con) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
			    "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,
			    con->iocb.u.isp24.port_name, con->ref_count);
			qlt_plogi_ack_unref(vha, con);
		} 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);
		}

		if (own)
			qlt_plogi_ack_unref(vha, own);
	}
621 622 623 624 625

	list_del(&sess->sess_list_entry);

	spin_unlock_irqrestore(&ha->hardware_lock, flags);

626 627 628 629 630 631 632 633 634 635 636 637 638
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
	    "Unregistration of sess %p finished\n", sess);

	kfree(sess);
	/*
	 * We need to protect against race, when tgt is freed before or
	 * inside wake_up()
	 */
	tgt->sess_count--;
	if (tgt->sess_count == 0)
		wake_up_all(&tgt->waitQ);
}

639
/* ha->tgt.sess_lock supposed to be held on entry */
640 641 642 643
void qlt_unreg_sess(struct qla_tgt_sess *sess)
{
	struct scsi_qla_host *vha = sess->vha;

644 645
	if (sess->se_sess)
		vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
646

647 648 649
	if (!list_empty(&sess->del_list_entry))
		list_del_init(&sess->del_list_entry);
	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
650 651 652 653 654 655

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

656

657 658 659 660 661 662 663 664 665
static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
{
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess = NULL;
	uint32_t unpacked_lun, lun = 0;
	uint16_t loop_id;
	int res = 0;
	struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
666
	unsigned long flags;
667 668 669 670

	loop_id = le16_to_cpu(n->u.isp24.nport_handle);
	if (loop_id == 0xFFFF) {
		/* Global event */
671
		atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
672
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
673
		qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
674
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
675
#if 0 /* FIXME: do we need to choose a session here? */
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700
		if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
			sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
			    typeof(*sess), sess_list_entry);
			switch (mcmd) {
			case QLA_TGT_NEXUS_LOSS_SESS:
				mcmd = QLA_TGT_NEXUS_LOSS;
				break;
			case QLA_TGT_ABORT_ALL_SESS:
				mcmd = QLA_TGT_ABORT_ALL;
				break;
			case QLA_TGT_NEXUS_LOSS:
			case QLA_TGT_ABORT_ALL:
				break;
			default:
				ql_dbg(ql_dbg_tgt, vha, 0xe046,
				    "qla_target(%d): Not allowed "
				    "command %x in %s", vha->vp_idx,
				    mcmd, __func__);
				sess = NULL;
				break;
			}
		} else
			sess = NULL;
#endif
	} else {
701
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
702
		sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
703
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
704 705 706 707 708 709 710 711 712 713
	}

	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,
714 715
	    "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
	    "loop_id %d)\n", vha->host_no, sess, sess->port_name,
716 717 718 719 720 721 722 723 724
	    mcmd, loop_id);

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

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

725
/* ha->tgt.sess_lock supposed to be held on entry */
726 727 728 729 730 731
static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
	bool immediate)
{
	struct qla_tgt *tgt = sess->tgt;
	uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;

732 733 734 735 736 737 738
	if (sess->deleted) {
		/* Upgrade to unconditional deletion in case it was temporary */
		if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
			list_del(&sess->del_list_entry);
		else
			return;
	}
739 740 741 742

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

743
	if (immediate) {
744
		dev_loss_tmo = 0;
745 746 747 748 749 750
		sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
		list_add(&sess->del_list_entry, &tgt->del_sess_list);
	} else {
		sess->deleted = QLA_SESS_DELETION_PENDING;
		list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
	}
751 752 753 754

	sess->expires = jiffies + dev_loss_tmo * HZ;

	ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
755 756 757 758 759 760
	    "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
	    " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
	    sess->vha->vp_idx, sess->port_name, sess->loop_id,
	    sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
	    dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
	    sess->generation);
761 762

	if (immediate)
763
		mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
764 765
	else
		schedule_delayed_work(&tgt->sess_del_work,
766
		    sess->expires - jiffies);
767 768
}

769
/* ha->tgt.sess_lock supposed to be held on entry */
J
Joern Engel 已提交
770
static void qlt_clear_tgt_db(struct qla_tgt *tgt)
771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804
{
	struct qla_tgt_sess *sess;

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

	/* At this point tgt could be already dead */
}

static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
	uint16_t *loop_id)
{
	struct qla_hw_data *ha = vha->hw;
	dma_addr_t gid_list_dma;
	struct gid_list_info *gid_list;
	char *id_iter;
	int res, rc, i;
	uint16_t entries;

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

	/* Get list of logged in devices */
	rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
	if (rc != QLA_SUCCESS) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
		    "qla_target(%d): get_id_list() failed: %x\n",
		    vha->vp_idx, rc);
805
		res = -EBUSY;
806 807 808 809
		goto out_free_id_list;
	}

	id_iter = (char *)gid_list;
810
	res = -ENOENT;
811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828
	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;
}

829
/* ha->tgt.sess_lock supposed to be held on entry */
830 831
static void qlt_undelete_sess(struct qla_tgt_sess *sess)
{
832
	BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
833

834
	list_del_init(&sess->del_list_entry);
835 836 837 838 839 840 841 842 843 844
	sess->deleted = 0;
}

static void qlt_del_sess_work_fn(struct delayed_work *work)
{
	struct qla_tgt *tgt = container_of(work, struct qla_tgt,
	    sess_del_work);
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess;
845
	unsigned long flags, elapsed;
846

847
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
848 849 850
	while (!list_empty(&tgt->del_sess_list)) {
		sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
		    del_list_entry);
851 852
		elapsed = jiffies;
		if (time_after_eq(elapsed, sess->expires)) {
853 854 855
			/* No turning back */
			list_del_init(&sess->del_list_entry);
			sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
856

857 858 859
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
			    "Timeout: sess %p about to be deleted\n",
			    sess);
860 861 862 863 864 865
			if (sess->se_sess) {
				ha->tgt.tgt_ops->shutdown_sess(sess);
				ha->tgt.tgt_ops->put_sess(sess);
			} else {
				qlt_unreg_sess(sess);
			}
866 867
		} else {
			schedule_delayed_work(&tgt->sess_del_work,
868
			    sess->expires - elapsed);
869 870 871
			break;
		}
	}
872
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888
}

/*
 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 * Caller must put it.
 */
static struct qla_tgt_sess *qlt_create_sess(
	struct scsi_qla_host *vha,
	fc_port_t *fcport,
	bool local)
{
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess;
	unsigned long flags;

	/* Check to avoid double sessions */
889
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
890
	list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
891 892 893 894 895 896 897 898 899 900 901
				sess_list_entry) {
		if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
			    "Double sess %p found (s_id %x:%x:%x, "
			    "loop_id %d), updating to d_id %x:%x:%x, "
			    "loop_id %d", sess, sess->s_id.b.domain,
			    sess->s_id.b.al_pa, sess->s_id.b.area,
			    sess->loop_id, fcport->d_id.b.domain,
			    fcport->d_id.b.al_pa, fcport->d_id.b.area,
			    fcport->loop_id);

902 903
			/* Cannot undelete at this point */
			if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
904
				spin_unlock_irqrestore(&ha->tgt.sess_lock,
905 906 907 908
				    flags);
				return NULL;
			}

909 910 911
			if (sess->deleted)
				qlt_undelete_sess(sess);

912 913 914 915 916 917 918 919
			if (!sess->se_sess) {
				if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
				    &sess->port_name[0], sess) < 0) {
					spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
					return NULL;
				}
			}

920
			kref_get(&sess->se_sess->sess_kref);
921 922 923
			ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
						(fcport->flags & FCF_CONF_COMP_SUPPORTED));

924 925
			if (sess->local && !local)
				sess->local = 0;
926 927 928

			qlt_do_generation_tick(vha, &sess->generation);

929
			spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
930 931 932 933

			return sess;
		}
	}
934
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
935 936 937 938

	sess = kzalloc(sizeof(*sess), GFP_KERNEL);
	if (!sess) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
939 940 941
		    "qla_target(%u): session allocation failed, all commands "
		    "from port %8phC will be refused", vha->vp_idx,
		    fcport->port_name);
942 943 944

		return NULL;
	}
945
	sess->tgt = vha->vha_tgt.qla_tgt;
946 947 948 949
	sess->vha = vha;
	sess->s_id = fcport->d_id;
	sess->loop_id = fcport->loop_id;
	sess->local = local;
950 951 952 953 954 955 956 957
	INIT_LIST_HEAD(&sess->del_list_entry);

	/* Under normal circumstances we want to logout from firmware when
	 * session eventually ends and release corresponding nport handle.
	 * In the exception cases (e.g. when new PLOGI is waiting) corresponding
	 * code will adjust these flags as necessary. */
	sess->logout_on_delete = 1;
	sess->keep_nport_handle = 0;
958 959 960

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
	    "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
961
	    sess, vha->vha_tgt.qla_tgt);
962

963
	sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
964 965 966
	BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
	memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));

967
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
968 969
	list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
	vha->vha_tgt.qla_tgt->sess_count++;
970
	qlt_do_generation_tick(vha, &sess->generation);
971
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
972 973

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
974 975 976 977 978
	    "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
	    "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
	    vha->vp_idx, local ?  "local " : "", fcport->port_name,
	    fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
	    sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
979

980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996
	/*
	 * Determine if this fc_port->port_name is allowed to access
	 * target mode using explict NodeACLs+MappedLUNs, or using
	 * TPG demo mode.  If this is successful a target mode FC nexus
	 * is created.
	 */
	if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
	    &fcport->port_name[0], sess) < 0) {
		return NULL;
	} else {
		/*
		 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
		 * access across ->tgt.sess_lock reaquire.
		 */
		kref_get(&sess->se_sess->sess_kref);
	}

997 998 999 1000
	return sess;
}

/*
1001
 * Called from qla2x00_reg_remote_port()
1002 1003 1004 1005
 */
void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
{
	struct qla_hw_data *ha = vha->hw;
1006
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1007 1008 1009 1010 1011 1012 1013 1014 1015
	struct qla_tgt_sess *sess;
	unsigned long flags;

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

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

1016 1017 1018
	if (qla_ini_mode_enabled(vha))
		return;

1019
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1020
	if (tgt->tgt_stop) {
1021
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1022 1023 1024 1025
		return;
	}
	sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
	if (!sess) {
1026
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1027

1028
		mutex_lock(&vha->vha_tgt.tgt_mutex);
1029
		sess = qlt_create_sess(vha, fcport, false);
1030
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
1031

1032
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1033 1034
	} else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
		/* Point of no return */
1035
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1036
		return;
1037 1038 1039 1040 1041 1042 1043
	} else {
		kref_get(&sess->se_sess->sess_kref);

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

			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
1044 1045 1046
			    "qla_target(%u): %ssession for port %8phC "
			    "(loop ID %d) reappeared\n", vha->vp_idx,
			    sess->local ? "local " : "", sess->port_name,
1047 1048 1049 1050 1051
			    sess->loop_id);

			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
			    "Reappeared sess %p\n", sess);
		}
1052 1053
		ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
					(fcport->flags & FCF_CONF_COMP_SUPPORTED));
1054 1055 1056 1057 1058
	}

	if (sess && sess->local) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
		    "qla_target(%u): local session for "
1059 1060
		    "port %8phC (loop ID %d) became global\n", vha->vp_idx,
		    fcport->port_name, sess->loop_id);
1061 1062 1063
		sess->local = 0;
	}
	ha->tgt.tgt_ops->put_sess(sess);
1064
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1065 1066
}

1067 1068 1069 1070 1071 1072
/*
 * 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)
1073
{
1074
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1075
	struct qla_tgt_sess *sess;
1076
	unsigned long flags;
1077 1078 1079 1080

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

1081
	if (!tgt)
1082 1083
		return;

1084
	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1085
	if (tgt->tgt_stop) {
1086
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1087 1088 1089 1090
		return;
	}
	sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
	if (!sess) {
1091
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1092 1093 1094
		return;
	}

1095
	if (max_gen - sess->generation < 0) {
1096
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1097 1098 1099 1100 1101 1102 1103 1104
		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;
	}

1105 1106 1107 1108
	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);
1109
	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
}

static inline int test_tgt_sess_count(struct qla_tgt *tgt)
{
	struct qla_hw_data *ha = tgt->ha;
	unsigned long flags;
	int res;
	/*
	 * We need to protect against race, when tgt is freed before or
	 * inside wake_up()
	 */
	spin_lock_irqsave(&ha->hardware_lock, flags);
	ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
	    "tgt %p, empty(sess_list)=%d sess_count=%d\n",
	    tgt, list_empty(&tgt->sess_list), tgt->sess_count);
	res = (tgt->sess_count == 0);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return res;
}

/* Called by tcm_qla2xxx configfs code */
1132
int qlt_stop_phase1(struct qla_tgt *tgt)
1133 1134 1135 1136 1137
{
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = tgt->ha;
	unsigned long flags;

1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152
	mutex_lock(&qla_tgt_mutex);
	if (!vha->fc_vport) {
		struct Scsi_Host *sh = vha->host;
		struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
		bool npiv_vports;

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

		if (npiv_vports) {
			mutex_unlock(&qla_tgt_mutex);
			return -EPERM;
		}
	}
1153 1154 1155
	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");
1156 1157
		mutex_unlock(&qla_tgt_mutex);
		return -EPERM;
1158 1159 1160 1161 1162 1163 1164 1165
	}

	ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
	    vha->host_no, vha);
	/*
	 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
	 * Lock is needed, because we still can get an incoming packet.
	 */
1166
	mutex_lock(&vha->vha_tgt.tgt_mutex);
1167
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1168
	tgt->tgt_stop = 1;
J
Joern Engel 已提交
1169
	qlt_clear_tgt_db(tgt);
1170
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1171
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1172
	mutex_unlock(&qla_tgt_mutex);
1173

1174
	flush_delayed_work(&tgt->sess_del_work);
1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
	    "Waiting for sess works (tgt %p)", tgt);
	spin_lock_irqsave(&tgt->sess_work_lock, flags);
	while (!list_empty(&tgt->sess_works_list)) {
		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
		flush_scheduled_work();
		spin_lock_irqsave(&tgt->sess_work_lock, flags);
	}
	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
	    "Waiting for tgt %p: list_empty(sess_list)=%d "
	    "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
	    tgt->sess_count);

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

	/* Big hammer */
	if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
		qlt_disable_vha(vha);

	/* Wait for sessions to clear out (just in case) */
	wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1199
	return 0;
1200 1201 1202 1203 1204 1205 1206
}
EXPORT_SYMBOL(qlt_stop_phase1);

/* Called by tcm_qla2xxx configfs code */
void qlt_stop_phase2(struct qla_tgt *tgt)
{
	struct qla_hw_data *ha = tgt->ha;
1207
	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1208 1209 1210
	unsigned long flags;

	if (tgt->tgt_stopped) {
1211
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1212 1213 1214 1215 1216
		    "Already in tgt->tgt_stopped state\n");
		dump_stack();
		return;
	}

1217
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1218 1219 1220
	    "Waiting for %d IRQ commands to complete (tgt %p)",
	    tgt->irq_cmd_count, tgt);

1221
	mutex_lock(&vha->vha_tgt.tgt_mutex);
1222
	spin_lock_irqsave(&ha->hardware_lock, flags);
1223
	while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1224 1225 1226 1227 1228 1229 1230
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		udelay(2);
		spin_lock_irqsave(&ha->hardware_lock, flags);
	}
	tgt->tgt_stop = 0;
	tgt->tgt_stopped = 1;
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
1231
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1232

1233
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1234 1235 1236 1237 1238
	    tgt);
}
EXPORT_SYMBOL(qlt_stop_phase2);

/* Called from qlt_remove_target() -> qla2x00_remove_one() */
1239
static void qlt_release(struct qla_tgt *tgt)
1240
{
1241
	scsi_qla_host_t *vha = tgt->vha;
1242

1243
	if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1244 1245
		qlt_stop_phase2(tgt);

1246
	vha->vha_tgt.qla_tgt = NULL;
1247

1248
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311
	    "Release of tgt %p finished\n", tgt);

	kfree(tgt);
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
	const void *param, unsigned int param_size)
{
	struct qla_tgt_sess_work_param *prm;
	unsigned long flags;

	prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
	if (!prm) {
		ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
		    "qla_target(%d): Unable to create session "
		    "work, command will be refused", 0);
		return -ENOMEM;
	}

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

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

	spin_lock_irqsave(&tgt->sess_work_lock, flags);
	list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);

	schedule_work(&tgt->sess_work);

	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_send_notify_ack(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *ntfy,
	uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
	uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
{
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	struct nack_to_isp *nack;

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

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

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

1312 1313
	if (vha->vha_tgt.qla_tgt != NULL)
		vha->vha_tgt.qla_tgt->notify_ack_expected++;
1314 1315 1316 1317 1318 1319 1320 1321 1322 1323

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

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

	nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
	if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
		nack->u.isp24.flags = ntfy->u.isp24.flags &
1324
			cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1325 1326 1327 1328
	}
	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;
1329
	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341
	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);

1342 1343
	/* Memory Barrier */
	wmb();
1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366
	qla2x00_start_iocbs(vha, vha->req);
}

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

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

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

1367
	resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381
	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;
1382
	f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418
	    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 */
	}

1419
	vha->vha_tgt.qla_tgt->abts_resp_expected++;
1420

1421 1422
	/* Memory Barrier */
	wmb();
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439
	qla2x00_start_iocbs(vha, vha->req);
}

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

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

1440
	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456
	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;
1457
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1458 1459 1460 1461 1462
	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;
1463 1464
	ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
					    CTIO7_FLAGS_TERMINATE);
1465
	ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1466

1467 1468
	/* Memory Barrier */
	wmb();
1469 1470 1471 1472 1473 1474
	qla2x00_start_iocbs(vha, vha->req);

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

1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491
static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
{
	struct qla_tgt_sess_op *op;
	struct qla_tgt_cmd *cmd;

	spin_lock(&vha->cmd_list_lock);

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

	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		if (tag == cmd->atio.u.isp24.exchange_addr) {
1492
			cmd->aborted = 1;
1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533
			spin_unlock(&vha->cmd_list_lock);
			return 1;
		}
	}

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

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

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

		op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
		op_lun = scsilun_to_int(
			(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
		if (op_key == key && op_lun == lun)
			op->aborted = true;
	}
	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		uint32_t cmd_key;
		uint32_t cmd_lun;

		cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
		cmd_lun = scsilun_to_int(
			(struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
		if (cmd_key == key && cmd_lun == lun)
1534
			cmd->aborted = 1;
1535 1536 1537 1538
	}
	spin_unlock(&vha->cmd_list_lock);
}

1539 1540 1541 1542 1543
/* ha->hardware_lock supposed to be held on entry */
static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
	struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
{
	struct qla_hw_data *ha = vha->hw;
1544
	struct se_session *se_sess = sess->se_sess;
1545
	struct qla_tgt_mgmt_cmd *mcmd;
1546 1547
	struct se_cmd *se_cmd;
	u32 lun = 0;
1548
	int rc;
1549 1550 1551 1552 1553 1554
	bool found_lun = false;

	spin_lock(&se_sess->sess_cmd_lock);
	list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
		struct qla_tgt_cmd *cmd =
			container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1555
		if (se_cmd->tag == abts->exchange_addr_to_abort) {
1556 1557 1558 1559 1560 1561 1562
			lun = cmd->unpacked_lun;
			found_lun = true;
			break;
		}
	}
	spin_unlock(&se_sess->sess_cmd_lock);

1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575
	/* cmd not in LIO lists, look in qla list */
	if (!found_lun) {
		if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
			/* send TASK_ABORT response immediately */
			qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
			return 0;
		} else {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
			    "unable to find cmd in driver or LIO for tag 0x%x\n",
			    abts->exchange_addr_to_abort);
			return -ENOENT;
		}
	}
1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591

	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));
1592
	mcmd->reset_count = vha->hw->chip_reset;
1593

1594
	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617
	    abts->exchange_addr_to_abort);
	if (rc != 0) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
		    "qla_target(%d):  tgt_ops->handle_tmr()"
		    " failed: %d", vha->vp_idx, rc);
		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
		return -EFAULT;
	}

	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
	struct abts_recv_from_24xx *abts)
{
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess;
	uint32_t tag = abts->exchange_addr_to_abort;
	uint8_t s_id[3];
	int rc;
1618
	unsigned long flags;
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645

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

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

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
	    "qla_target(%d): task abort (s_id=%x:%x:%x, "
	    "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
	    abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
	    le32_to_cpu(abts->fcp_hdr_le.parameter));

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

1646
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1647 1648 1649 1650 1651
	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);
1652
		rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1653
		    QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1654 1655 1656

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

1657 1658 1659 1660 1661 1662
		if (rc != 0) {
			qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
			    false);
		}
		return;
	}
1663 1664
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

1665

1666 1667 1668 1669 1670
	if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
		qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
		return;
	}

1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688
	rc = __qlt_24xx_handle_abts(vha, abts, sess);
	if (rc != 0) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
		    "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
		    vha->vp_idx, rc);
		qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
		return;
	}
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
	struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
{
	struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
	struct ctio7_to_24xx *ctio;
1689
	uint16_t temp;
1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710

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

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

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

	ctio->entry_type = CTIO_TYPE7;
	ctio->entry_count = 1;
	ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
	ctio->nport_handle = mcmd->sess->loop_id;
1711
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1712 1713 1714 1715 1716 1717
	ctio->vp_index = ha->vp_idx;
	ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio->exchange_addr = atio->u.isp24.exchange_addr;
	ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1718
	    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1719 1720
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio->u.status1.ox_id = cpu_to_le16(temp);
1721
	ctio->u.status1.scsi_status =
1722 1723
	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
	ctio->u.status1.response_len = cpu_to_le16(8);
1724
	ctio->u.status1.sense_data[0] = resp_code;
1725

1726 1727
	/* Memory Barrier */
	wmb();
1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748
	qla2x00_start_iocbs(ha, ha->req);
}

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

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

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

	spin_lock_irqsave(&ha->hardware_lock, flags);
1749

1750
	if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
1751
		/*
1752
		 * Either the port is not online or this request was from
1753 1754 1755
		 * previous life, just abort the processing.
		 */
		ql_dbg(ql_dbg_async, vha, 0xe100,
1756 1757 1758
			"RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
			mcmd->reset_count, ha->chip_reset);
1759 1760 1761 1762 1763
		ha->tgt.tgt_ops->free_mcmd(mcmd);
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return;
	}

1764 1765 1766 1767
	if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
		qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
		    0, 0, 0, 0, 0, 0);
	else {
1768
		if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802
			qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
			    mcmd->fc_tm_rsp, false);
		else
			qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
			    mcmd->fc_tm_rsp);
	}
	/*
	 * Make the callback for ->free_mcmd() to queue_work() and invoke
	 * target_put_sess_cmd() to drop cmd_kref to 1.  The final
	 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
	 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
	 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
	 * qlt_xmit_tm_rsp() returns here..
	 */
	ha->tgt.tgt_ops->free_mcmd(mcmd);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
EXPORT_SYMBOL(qlt_xmit_tm_rsp);

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

	BUG_ON(cmd->sg_cnt == 0);

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

	prm->cmd->sg_mapped = 1;

1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838
	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
		/*
		 * If greater than four sg entries then we need to allocate
		 * the continuation entries
		 */
		if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
			prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
			prm->tgt->datasegs_per_cmd,
			prm->tgt->datasegs_per_cont);
	} else {
		/* DIF */
		if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
		    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
			prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
			prm->tot_dsds = prm->seg_cnt;
		} else
			prm->tot_dsds = prm->seg_cnt;

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

			if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
			    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
				/* Dif Bundling not support here */
				prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
								cmd->blk_sz);
				prm->tot_dsds += prm->prot_seg_cnt;
			} else
				prm->tot_dsds += prm->prot_seg_cnt;
		}
	}
1839 1840 1841 1842 1843 1844 1845 1846 1847 1848

	return 0;

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

J
Joern Engel 已提交
1849
static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1850 1851 1852
{
	struct qla_hw_data *ha = vha->hw;

J
Joern Engel 已提交
1853 1854 1855
	if (!cmd->sg_mapped)
		return;

1856 1857
	pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
	cmd->sg_mapped = 0;
1858 1859 1860 1861 1862 1863 1864 1865 1866 1867

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

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

	if (cmd->ctx)
		dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1868 1869 1870 1871 1872
}

static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
	uint32_t req_cnt)
{
1873
	uint32_t cnt, cnt_in;
1874 1875

	if (vha->req->cnt < (req_cnt + 2)) {
1876
		cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1877
		cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1878 1879 1880 1881 1882 1883 1884

		if  (vha->req->ring_index < cnt)
			vha->req->cnt = cnt - vha->req->ring_index;
		else
			vha->req->cnt = vha->req->length -
			    (vha->req->ring_index - cnt);

1885 1886 1887 1888 1889 1890 1891 1892
		if (unlikely(vha->req->cnt < (req_cnt + 2))) {
			ql_dbg(ql_dbg_io, vha, 0x305a,
			    "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
			    vha->vp_idx, vha->req->ring_index,
			    vha->req->cnt, req_cnt, cnt, cnt_in,
			    vha->req->length);
			return -EAGAIN;
		}
1893
	}
1894

1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925
	vha->req->cnt -= req_cnt;

	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
{
	/* Adjust ring index. */
	vha->req->ring_index++;
	if (vha->req->ring_index == vha->req->length) {
		vha->req->ring_index = 0;
		vha->req->ring_ptr = vha->req->ring;
	} else {
		vha->req->ring_ptr++;
	}
	return (cont_entry_t *)vha->req->ring_ptr;
}

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

	h = ha->tgt.current_handle;
	/* always increment cmd handle */
	do {
		++h;
1926
		if (h > DEFAULT_OUTSTANDING_COMMANDS)
1927 1928
			h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
		if (h == ha->tgt.current_handle) {
1929
			ql_dbg(ql_dbg_io, vha, 0x305b,
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952
			    "qla_target(%d): Ran out of "
			    "empty cmd slots in ha %p\n", vha->vp_idx, ha);
			h = QLA_TGT_NULL_HANDLE;
			break;
		}
	} while ((h == QLA_TGT_NULL_HANDLE) ||
	    (h == QLA_TGT_SKIP_HANDLE) ||
	    (ha->tgt.cmds[h-1] != NULL));

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

	return h;
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
	struct scsi_qla_host *vha)
{
	uint32_t h;
	struct ctio7_to_24xx *pkt;
	struct qla_hw_data *ha = vha->hw;
	struct atio_from_isp *atio = &prm->cmd->atio;
1953
	uint16_t temp;
1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975

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

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

	h = qlt_make_handle(vha);
	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
		/*
		 * CTIO type 7 from the firmware doesn't provide a way to
		 * know the initiator's LOOP ID, hence we can't find
		 * the session and, so, the command.
		 */
		return -EAGAIN;
	} else
		ha->tgt.cmds[h-1] = prm->cmd;

	pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
	pkt->nport_handle = prm->cmd->loop_id;
1976
	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1977 1978 1979 1980 1981
	pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	pkt->exchange_addr = atio->u.isp24.exchange_addr;
	pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1982 1983
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	pkt->u.status0.ox_id = cpu_to_le16(temp);
1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136
	pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);

	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. We have already made sure
 * that there is sufficient amount of request entries to not drop it.
 */
static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
	struct scsi_qla_host *vha)
{
	int cnt;
	uint32_t *dword_ptr;
	int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;

	/* Build continuation packets */
	while (prm->seg_cnt > 0) {
		cont_a64_entry_t *cont_pkt64 =
			(cont_a64_entry_t *)qlt_get_req_pkt(vha);

		/*
		 * Make sure that from cont_pkt64 none of
		 * 64-bit specific fields used for 32-bit
		 * addressing. Cast to (cont_entry_t *) for
		 * that.
		 */

		memset(cont_pkt64, 0, sizeof(*cont_pkt64));

		cont_pkt64->entry_count = 1;
		cont_pkt64->sys_define = 0;

		if (enable_64bit_addressing) {
			cont_pkt64->entry_type = CONTINUE_A64_TYPE;
			dword_ptr =
			    (uint32_t *)&cont_pkt64->dseg_0_address;
		} else {
			cont_pkt64->entry_type = CONTINUE_TYPE;
			dword_ptr =
			    (uint32_t *)&((cont_entry_t *)
				cont_pkt64)->dseg_0_address;
		}

		/* Load continuation entry data segments */
		for (cnt = 0;
		    cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
		    cnt++, prm->seg_cnt--) {
			*dword_ptr++ =
			    cpu_to_le32(pci_dma_lo32
				(sg_dma_address(prm->sg)));
			if (enable_64bit_addressing) {
				*dword_ptr++ =
				    cpu_to_le32(pci_dma_hi32
					(sg_dma_address
					(prm->sg)));
			}
			*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));

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

/*
 * ha->hardware_lock supposed to be held on entry. We have already made sure
 * that there is sufficient amount of request entries to not drop it.
 */
static void qlt_load_data_segments(struct qla_tgt_prm *prm,
	struct scsi_qla_host *vha)
{
	int cnt;
	uint32_t *dword_ptr;
	int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
	struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;

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

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

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

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

	/* If scatter gather */

	/* Load command entry data segments */
	for (cnt = 0;
	    (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
	    cnt++, prm->seg_cnt--) {
		*dword_ptr++ =
		    cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
		if (enable_64bit_addressing) {
			*dword_ptr++ =
			    cpu_to_le32(pci_dma_hi32(
				sg_dma_address(prm->sg)));
		}
		*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));

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

	qlt_load_cont_data_segments(prm, vha);
}

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

/*
 * Called without ha->hardware_lock held
 */
static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
	struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
	uint32_t *full_req_cnt)
{
	struct qla_tgt *tgt = cmd->tgt;
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = vha->hw;
	struct se_cmd *se_cmd = &cmd->se_cmd;

	prm->cmd = cmd;
	prm->tgt = tgt;
	prm->rq_result = scsi_status;
	prm->sense_buffer = &cmd->sense_buffer[0];
	prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
	prm->sg = NULL;
	prm->seg_cnt = -1;
	prm->req_cnt = 1;
	prm->add_status_pkt = 0;

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

	if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
		if  (qlt_pci_map_calc_cnt(prm) != 0)
			return -EAGAIN;
	}

	*full_req_cnt = prm->req_cnt;

	if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
		prm->residual = se_cmd->residual_count;
2137
		ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2138 2139 2140 2141
		    "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);
2142 2143 2144
		prm->rq_result |= SS_RESIDUAL_UNDER;
	} else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
		prm->residual = se_cmd->residual_count;
2145
		ql_dbg(ql_dbg_io, vha, 0x305d,
2146 2147 2148
		    "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);
2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220
		prm->rq_result |= SS_RESIDUAL_OVER;
	}

	if (xmit_type & QLA_TGT_XMIT_STATUS) {
		/*
		 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
		 * ignored in *xmit_response() below
		 */
		if (qlt_has_data(cmd)) {
			if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
			    (IS_FWI2_CAPABLE(ha) &&
			    (prm->rq_result != 0))) {
				prm->add_status_pkt = 1;
				(*full_req_cnt)++;
			}
		}
	}

	return 0;
}

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

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

#ifdef CONFIG_QLA_TGT_DEBUG_SRR
/*
 *  Original taken from the XFS code
 */
static unsigned long qlt_srr_random(void)
{
	static int Inited;
	static unsigned long RandomValue;
	static DEFINE_SPINLOCK(lock);
	/* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
	register long rv;
	register long lo;
	register long hi;
	unsigned long flags;

	spin_lock_irqsave(&lock, flags);
	if (!Inited) {
		RandomValue = jiffies;
		Inited = 1;
	}
	rv = RandomValue;
	hi = rv / 127773;
	lo = rv % 127773;
	rv = 16807 * lo - 2836 * hi;
	if (rv <= 0)
		rv += 2147483647;
	RandomValue = rv;
	spin_unlock_irqrestore(&lock, flags);
	return rv;
}

static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
{
#if 0 /* This is not a real status packets lost, so it won't lead to SRR */
	if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
	    == 50) {
		*xmit_type &= ~QLA_TGT_XMIT_STATUS;
		ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2221
		    "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244
	}
#endif
	/*
	 * It's currently not possible to simulate SRRs for FCP_WRITE without
	 * a physical link layer failure, so don't even try here..
	 */
	if (cmd->dma_data_direction != DMA_FROM_DEVICE)
		return;

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

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

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

		ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
		    "Cutting cmd %p (tag %d) buffer"
		    " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2245
		    " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256
		    cmd->bufflen, cmd->sg_cnt);

		cmd->bufflen = tot_len;
		cmd->sg_cnt = leave;
	}

	if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
		unsigned int offset = qlt_srr_random() % cmd->bufflen;

		ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
		    "Cutting cmd %p (tag %d) buffer head "
2257
		    "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2258 2259 2260 2261 2262
		    cmd->bufflen);
		if (offset == 0)
			*xmit_type &= ~QLA_TGT_XMIT_DATA;
		else if (qlt_set_data_offset(cmd, offset)) {
			ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2263
			    "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276
		}
	}
}
#else
static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
{}
#endif

static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
	struct qla_tgt_prm *prm)
{
	prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
	    (uint32_t)sizeof(ctio->u.status1.sense_data));
2277
	ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2278
	if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2279
		ctio->u.status0.flags |= cpu_to_le16(
2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295
		    CTIO7_FLAGS_EXPLICIT_CONFORM |
		    CTIO7_FLAGS_CONFORM_REQ);
	}
	ctio->u.status0.residual = cpu_to_le32(prm->residual);
	ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
	if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
		int i;

		if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
			if (prm->cmd->se_cmd.scsi_status != 0) {
				ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
				    "Skipping EXPLICIT_CONFORM and "
				    "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
				    "non GOOD status\n");
				goto skip_explict_conf;
			}
2296
			ctio->u.status1.flags |= cpu_to_le16(
2297 2298 2299 2300 2301
			    CTIO7_FLAGS_EXPLICIT_CONFORM |
			    CTIO7_FLAGS_CONFORM_REQ);
		}
skip_explict_conf:
		ctio->u.status1.flags &=
2302
		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2303
		ctio->u.status1.flags |=
2304
		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2305
		ctio->u.status1.scsi_status |=
2306
		    cpu_to_le16(SS_SENSE_LEN_VALID);
2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325
		ctio->u.status1.sense_length =
		    cpu_to_le16(prm->sense_buffer_len);
		for (i = 0; i < prm->sense_buffer_len/4; i++)
			((uint32_t *)ctio->u.status1.sense_data)[i] =
				cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
#if 0
		if (unlikely((prm->sense_buffer_len % 4) != 0)) {
			static int q;
			if (q < 10) {
				ql_dbg(ql_dbg_tgt, vha, 0xe04f,
				    "qla_target(%d): %d bytes of sense "
				    "lost", prm->tgt->ha->vp_idx,
				    prm->sense_buffer_len % 4);
				q++;
			}
		}
#endif
	} else {
		ctio->u.status1.flags &=
2326
		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2327
		ctio->u.status1.flags |=
2328
		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2329 2330 2331 2332 2333 2334 2335 2336
		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 ??? */
}

2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382


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

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

	/* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
	 * have been immplemented by TCM, before AppTag is avail.
	 * Look for modesense_handlers[]
	 */
2383
	ctx->app_tag = 0;
2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463
	ctx->app_tag_mask[0] = 0x0;
	ctx->app_tag_mask[1] = 0x0;

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

		if (!qlt_hba_err_chk_enabled(se_cmd))
			break;

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

		if (!qlt_hba_err_chk_enabled(se_cmd))
			break;

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

		if (!qlt_hba_err_chk_enabled(se_cmd))
			break;

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

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


static inline int
qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
{
	uint32_t		*cur_dsd;
	uint32_t		transfer_length = 0;
	uint32_t		data_bytes;
	uint32_t		dif_bytes;
	uint8_t			bundling = 1;
	uint8_t			*clr_ptr;
	struct crc_context	*crc_ctx_pkt = NULL;
	struct qla_hw_data	*ha;
	struct ctio_crc2_to_fw	*pkt;
	dma_addr_t		crc_ctx_dma;
	uint16_t		fw_prot_opts = 0;
	struct qla_tgt_cmd	*cmd = prm->cmd;
	struct se_cmd		*se_cmd = &cmd->se_cmd;
	uint32_t h;
	struct atio_from_isp *atio = &prm->cmd->atio;
2464
	uint16_t t16;
2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554

	ha = vha->hw;

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

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

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

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

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

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

	default:
		BUG();
		break;
	}

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

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


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

	h = qlt_make_handle(vha);
	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
		/*
		 * CTIO type 7 from the firmware doesn't provide a way to
		 * know the initiator's LOOP ID, hence we can't find
		 * the session and, so, the command.
		 */
		return -EAGAIN;
	} else
		ha->tgt.cmds[h-1] = prm->cmd;


	pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
	pkt->nport_handle = prm->cmd->loop_id;
2555
	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2556 2557 2558 2559
	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;
2560 2561 2562 2563 2564 2565 2566

	/* 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);
2567 2568 2569 2570
	pkt->relative_offset = cpu_to_le32(prm->cmd->offset);

	/* Set transfer direction */
	if (cmd->dma_data_direction == DMA_TO_DEVICE)
2571
		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2572
	else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2573
		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624


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


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

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

	if (!crc_ctx_pkt)
		goto crc_queuing_error;

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

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

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

	qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);

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


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

	/* Finish the common fields of CRC pkt */
	crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
	crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
	crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2625
	crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2626 2627 2628


	/* Walks data segments */
2629
	pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640

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

	if (bundling && prm->prot_seg_cnt) {
		/* Walks dif segments */
2641
		pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656

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

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

	return QLA_FUNCTION_FAILED;
}


2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671
/*
 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
 */
int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
	uint8_t scsi_status)
{
	struct scsi_qla_host *vha = cmd->vha;
	struct qla_hw_data *ha = vha->hw;
	struct ctio7_to_24xx *pkt;
	struct qla_tgt_prm prm;
	uint32_t full_req_cnt = 0;
	unsigned long flags = 0;
	int res;

2672 2673 2674 2675 2676 2677 2678
	spin_lock_irqsave(&ha->hardware_lock, flags);
	if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
		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
2679
			qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
2680 2681 2682 2683 2684
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return 0;
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

2685 2686 2687 2688
	memset(&prm, 0, sizeof(prm));
	qlt_check_srr_debug(cmd, &xmit_type);

	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2689 2690 2691 2692
	    "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
	    (xmit_type & QLA_TGT_XMIT_STATUS) ?
	    1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
	    &cmd->se_cmd);
2693 2694 2695 2696 2697 2698 2699 2700 2701

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

	spin_lock_irqsave(&ha->hardware_lock, flags);

2702 2703 2704 2705 2706
	if (xmit_type == QLA_TGT_XMIT_STATUS)
		vha->tgt_counters.core_qla_snd_status++;
	else
		vha->tgt_counters.core_qla_que_buf++;

2707
	if (!vha->flags.online || cmd->reset_count != ha->chip_reset) {
2708
		/*
2709
		 * Either the port is not online or this request was from
2710 2711 2712 2713 2714
		 * previous life, just abort the processing.
		 */
		cmd->state = QLA_TGT_STATE_PROCESSED;
		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
		ql_dbg(ql_dbg_async, vha, 0xe101,
2715 2716 2717
			"RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
			cmd->reset_count, ha->chip_reset);
2718 2719 2720 2721
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return 0;
	}

2722 2723 2724 2725 2726
	/* Does F/W have an IOCBs for this request */
	res = qlt_check_reserve_free_req(vha, full_req_cnt);
	if (unlikely(res))
		goto out_unmap_unlock;

2727 2728 2729 2730
	if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
		res = qlt_build_ctio_crc2_pkt(&prm, vha);
	else
		res = qlt_24xx_build_ctio_pkt(&prm, vha);
2731 2732
	if (unlikely(res != 0)) {
		vha->req->cnt += full_req_cnt;
2733
		goto out_unmap_unlock;
2734
	}
2735 2736 2737 2738 2739

	pkt = (struct ctio7_to_24xx *)prm.pkt;

	if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
		pkt->u.status0.flags |=
2740
		    cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2741 2742
			CTIO7_FLAGS_STATUS_MODE_0);

2743 2744
		if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
			qlt_load_data_segments(&prm, vha);
2745 2746 2747 2748 2749 2750 2751

		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);
2752
				pkt->u.status0.flags |= cpu_to_le16(
2753 2754 2755
				    CTIO7_FLAGS_SEND_STATUS);
				if (qlt_need_explicit_conf(ha, cmd, 0)) {
					pkt->u.status0.flags |=
2756
					    cpu_to_le16(
2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770
						CTIO7_FLAGS_EXPLICIT_CONFORM |
						CTIO7_FLAGS_CONFORM_REQ);
				}
			}

		} else {
			/*
			 * We have already made sure that there is sufficient
			 * amount of request entries to not drop HW lock in
			 * req_pkt().
			 */
			struct ctio7_to_24xx *ctio =
				(struct ctio7_to_24xx *)qlt_get_req_pkt(vha);

2771 2772 2773
			ql_dbg(ql_dbg_io, vha, 0x305e,
			    "Building additional status packet 0x%p.\n",
			    ctio);
2774

2775 2776 2777 2778
			/*
			 * T10Dif: ctio_crc2_to_fw overlay ontop of
			 * ctio7_to_24xx
			 */
2779
			memcpy(ctio, pkt, sizeof(*ctio));
2780
			/* reset back to CTIO7 */
2781
			ctio->entry_count = 1;
2782
			ctio->entry_type = CTIO_TYPE7;
2783
			ctio->dseg_count = 0;
2784
			ctio->u.status1.flags &= ~cpu_to_le16(
2785 2786 2787 2788
			    CTIO7_FLAGS_DATA_IN);

			/* Real finish is ctio_m1's finish */
			pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2789
			pkt->u.status0.flags |= cpu_to_le16(
2790
			    CTIO7_FLAGS_DONT_RET_CTIO);
2791 2792 2793 2794 2795

			/* 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.
			 */
2796 2797 2798 2799 2800 2801 2802 2803 2804
			qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
			    &prm);
			pr_debug("Status CTIO7: %p\n", ctio);
		}
	} else
		qlt_24xx_init_ctio_to_isp(pkt, &prm);


	cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2805
	cmd->cmd_sent_to_fw = 1;
2806

2807 2808
	/* Memory Barrier */
	wmb();
2809 2810 2811 2812 2813 2814
	qla2x00_start_iocbs(vha, vha->req);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return 0;

out_unmap_unlock:
J
Joern Engel 已提交
2815
	qlt_unmap_sg(vha, cmd);
2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return res;
}
EXPORT_SYMBOL(qlt_xmit_response);

int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
{
	struct ctio7_to_24xx *pkt;
	struct scsi_qla_host *vha = cmd->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt *tgt = cmd->tgt;
	struct qla_tgt_prm prm;
	unsigned long flags;
	int res = 0;

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

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

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

	spin_lock_irqsave(&ha->hardware_lock, flags);

2848
	if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) ||
2849
	    (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2850
		/*
2851
		 * Either the port is not online or this request was from
2852 2853 2854 2855 2856
		 * previous life, just abort the processing.
		 */
		cmd->state = QLA_TGT_STATE_NEED_DATA;
		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
		ql_dbg(ql_dbg_async, vha, 0xe102,
2857 2858 2859
			"RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
			cmd->reset_count, ha->chip_reset);
2860 2861 2862 2863
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		return 0;
	}

2864 2865 2866 2867
	/* Does F/W have an IOCBs for this request */
	res = qlt_check_reserve_free_req(vha, prm.req_cnt);
	if (res != 0)
		goto out_unlock_free_unmap;
2868 2869 2870 2871
	if (cmd->se_cmd.prot_op)
		res = qlt_build_ctio_crc2_pkt(&prm, vha);
	else
		res = qlt_24xx_build_ctio_pkt(&prm, vha);
2872

2873 2874
	if (unlikely(res != 0)) {
		vha->req->cnt += prm.req_cnt;
2875
		goto out_unlock_free_unmap;
2876 2877
	}

2878
	pkt = (struct ctio7_to_24xx *)prm.pkt;
2879
	pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2880
	    CTIO7_FLAGS_STATUS_MODE_0);
2881 2882 2883

	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
		qlt_load_data_segments(&prm, vha);
2884 2885

	cmd->state = QLA_TGT_STATE_NEED_DATA;
2886
	cmd->cmd_sent_to_fw = 1;
2887

2888 2889
	/* Memory Barrier */
	wmb();
2890 2891 2892 2893 2894 2895
	qla2x00_start_iocbs(vha, vha->req);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return res;

out_unlock_free_unmap:
J
Joern Engel 已提交
2896
	qlt_unmap_sg(vha, cmd);
2897 2898 2899 2900 2901 2902
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return res;
}
EXPORT_SYMBOL(qlt_rdy_to_xfer);

2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930

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

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

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

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

	ql_dbg(ql_dbg_tgt, vha, 0xf075,
2931
	    "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953
	    cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
	    a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);

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

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

		/* Update protection tag */
		if (cmd->prot_sg_cnt) {
2954
			uint32_t i, k = 0, num_ent;
2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038
			struct scatterlist *sg, *sgl;


			sgl = cmd->prot_sg;

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

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

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

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

		return 0;
	}

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

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

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

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

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

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


3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121
/* If hardware_lock held on entry, might drop it, then reaquire */
/* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *ntfy)
{
	struct nack_to_isp *nack;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	int ret = 0;

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

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

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

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

	nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
	if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
		nack->u.isp24.flags = ntfy->u.isp24.flags &
			__constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
	}

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

	nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
	nack->u.isp24.status = ntfy->u.isp24.status;
	nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
	nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
	nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
	nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
	nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;

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

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

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

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

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

3122 3123 3124 3125 3126 3127 3128 3129 3130 3131
/* If hardware_lock held on entry, might drop it, then reaquire */
/* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
	struct qla_tgt_cmd *cmd,
	struct atio_from_isp *atio)
{
	struct ctio7_to_24xx *ctio24;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	int ret = 0;
3132
	uint16_t temp;
3133 3134 3135

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

3136
	pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153
	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;
	}

3154
	vha->tgt_counters.num_term_xchg_sent++;
3155 3156 3157 3158 3159
	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;
3160
	ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3161
	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3162 3163 3164 3165 3166 3167
	ctio24->vp_index = vha->vp_idx;
	ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
	ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3168
	    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3169
		CTIO7_FLAGS_TERMINATE);
3170 3171
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio24->u.status1.ox_id = cpu_to_le16(temp);
3172 3173 3174 3175 3176 3177 3178 3179

	/* 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;

3180 3181
	/* Memory Barrier */
	wmb();
3182 3183 3184 3185 3186
	qla2x00_start_iocbs(vha, vha->req);
	return ret;
}

static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3187 3188
	struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
	int ul_abort)
3189
{
3190
	unsigned long flags = 0;
3191 3192 3193 3194 3195 3196 3197
	int rc;

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

	if (ha_locked) {
		rc = __qlt_send_term_exchange(vha, cmd, atio);
3198 3199
		if (rc == -ENOMEM)
			qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3200 3201 3202 3203
		goto done;
	}
	spin_lock_irqsave(&vha->hw->hardware_lock, flags);
	rc = __qlt_send_term_exchange(vha, cmd, atio);
3204 3205
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3206

3207
done:
3208
	if (cmd && !ul_abort && !cmd->aborted) {
3209 3210
		if (cmd->sg_mapped)
			qlt_unmap_sg(vha, cmd);
3211 3212
		vha->hw->tgt.tgt_ops->free_cmd(cmd);
	}
3213 3214 3215 3216

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

3217
	return;
3218 3219
}

3220 3221 3222 3223 3224 3225
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 =
3226
	    (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255

	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",
3256
		    total_leaked, vha->hw->cur_fw_xcb_count);
3257 3258 3259 3260 3261 3262 3263 3264 3265 3266

		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);
	}

}

3267
int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3268 3269 3270 3271
{
	struct qla_tgt *tgt = cmd->tgt;
	struct scsi_qla_host *vha = tgt->vha;
	struct se_cmd *se_cmd = &cmd->se_cmd;
3272
	unsigned long flags;
3273 3274 3275 3276 3277 3278

	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);

3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292
	spin_lock_irqsave(&cmd->cmd_lock, flags);
	if (cmd->aborted) {
		spin_unlock_irqrestore(&cmd->cmd_lock, flags);
		/*
		 * It's normal to see 2 calls in this path:
		 *  1) XFER Rdy completion + CMD_T_ABORT
		 *  2) TCM TMR - drain_state_list
		 */
	        ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
			"multiple abort. %p transport_state %x, t_state %x,"
			" se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
			cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
		return EIO;
	}
3293
	cmd->aborted = 1;
3294
	cmd->cmd_flags |= BIT_6;
3295
	spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3296

3297 3298
	qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
	return 0;
3299 3300 3301
}
EXPORT_SYMBOL(qlt_abort_cmd);

3302 3303
void qlt_free_cmd(struct qla_tgt_cmd *cmd)
{
3304 3305
	struct qla_tgt_sess *sess = cmd->sess;

3306 3307 3308 3309
	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));
3310

3311 3312
	BUG_ON(cmd->cmd_in_wq);

3313 3314 3315
	if (cmd->sg_mapped)
		qlt_unmap_sg(cmd->vha, cmd);

3316 3317 3318
	if (!cmd->q_full)
		qlt_decr_num_pend_cmds(cmd->vha);

3319
	BUG_ON(cmd->sg_mapped);
3320
	cmd->jiffies_at_free = get_jiffies_64();
3321 3322
	if (unlikely(cmd->free_sg))
		kfree(cmd->sg);
3323 3324 3325 3326 3327

	if (!sess || !sess->se_sess) {
		WARN_ON(1);
		return;
	}
3328
	cmd->jiffies_at_free = get_jiffies_64();
3329
	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3330 3331 3332 3333 3334 3335 3336 3337
}
EXPORT_SYMBOL(qlt_free_cmd);

/* ha->hardware_lock supposed to be held on entry */
static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
	struct qla_tgt_cmd *cmd, void *ctio)
{
	struct qla_tgt_srr_ctio *sc;
3338
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3339 3340 3341
	struct qla_tgt_srr_imm *imm;

	tgt->ctio_srr_id++;
3342
	cmd->cmd_flags |= BIT_15;
3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 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

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

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

	sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
	if (sc != NULL) {
		sc->cmd = cmd;
		/* IRQ is already OFF */
		spin_lock(&tgt->srr_lock);
		sc->srr_id = tgt->ctio_srr_id;
		list_add_tail(&sc->srr_list_entry,
		    &tgt->srr_ctio_list);
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
		    "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
		if (tgt->imm_srr_id == tgt->ctio_srr_id) {
			int found = 0;
			list_for_each_entry(imm, &tgt->srr_imm_list,
			    srr_list_entry) {
				if (imm->srr_id == sc->srr_id) {
					found = 1;
					break;
				}
			}
			if (found) {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
				    "Scheduling srr work\n");
				schedule_work(&tgt->srr_work);
			} else {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
				    "qla_target(%d): imm_srr_id "
				    "== ctio_srr_id (%d), but there is no "
				    "corresponding SRR IMM, deleting CTIO "
				    "SRR %p\n", vha->vp_idx,
				    tgt->ctio_srr_id, sc);
				list_del(&sc->srr_list_entry);
				spin_unlock(&tgt->srr_lock);

				kfree(sc);
				return -EINVAL;
			}
		}
		spin_unlock(&tgt->srr_lock);
	} else {
		struct qla_tgt_srr_imm *ti;

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
		    "qla_target(%d): Unable to allocate SRR CTIO entry\n",
		    vha->vp_idx);
		spin_lock(&tgt->srr_lock);
		list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
		    srr_list_entry) {
			if (imm->srr_id == tgt->ctio_srr_id) {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
				    "IMM SRR %p deleted (id %d)\n",
				    imm, imm->srr_id);
				list_del(&imm->srr_list_entry);
				qlt_reject_free_srr_imm(vha, imm, 1);
			}
		}
		spin_unlock(&tgt->srr_lock);

		return -ENOMEM;
	}

	return 0;
}

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

	if (ctio != NULL) {
		struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
		term = !(c->flags &
3428
		    cpu_to_le16(OF_TERM_EXCH));
3429 3430 3431 3432
	} else
		term = 1;

	if (term)
3433
		qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463

	return term;
}

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

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

/* ha->hardware_lock supposed to be held on entry */
static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
	uint32_t handle, void *ctio)
{
	struct qla_tgt_cmd *cmd = NULL;

	/* Clear out internal marks */
	handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
	    CTIO_INTERMEDIATE_HANDLE_MARK);

	if (handle != QLA_TGT_NULL_HANDLE) {
3464
		if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3465
			return NULL;
3466

3467
		/* handle-1 is actually used */
3468
		if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492
			ql_dbg(ql_dbg_tgt, vha, 0xe052,
			    "qla_target(%d): Wrong handle %x received\n",
			    vha->vp_idx, handle);
			return NULL;
		}
		cmd = qlt_get_cmd(vha, handle);
		if (unlikely(cmd == NULL)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe053,
			    "qla_target(%d): Suspicious: unable to "
			    "find the command with handle %x\n", vha->vp_idx,
			    handle);
			return NULL;
		}
	} else if (ctio != NULL) {
		/* We can't get loop ID from CTIO7 */
		ql_dbg(ql_dbg_tgt, vha, 0xe054,
		    "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
		    "support NULL handles\n", vha->vp_idx);
		return NULL;
	}

	return cmd;
}

3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524
/* hardware_lock should be held by caller. */
static void
qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
{
	struct qla_hw_data *ha = vha->hw;
	uint32_t handle;

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

	handle = qlt_make_handle(vha);

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

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

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

Q
Quinn Tran 已提交
3525
	cmd->cmd_flags |= BIT_17;
3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564
	ha->tgt.tgt_ops->free_cmd(cmd);
}

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

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

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

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

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


3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585
/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
	uint32_t status, void *ctio)
{
	struct qla_hw_data *ha = vha->hw;
	struct se_cmd *se_cmd;
	struct qla_tgt_cmd *cmd;

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

	cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3586
	if (cmd == NULL)
3587
		return;
3588

3589
	se_cmd = &cmd->se_cmd;
3590
	cmd->cmd_sent_to_fw = 0;
3591

J
Joern Engel 已提交
3592
	qlt_unmap_sg(vha, cmd);
3593 3594 3595 3596 3597 3598

	if (unlikely(status != CTIO_SUCCESS)) {
		switch (status & 0xFFFF) {
		case CTIO_LIP_RESET:
		case CTIO_TARGET_RESET:
		case CTIO_ABORTED:
3599
			/* driver request abort via Terminate exchange */
3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612
		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:
3613
		{
3614 3615 3616
			int logged_out =
				(status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;

3617
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3618
			    "qla_target(%d): CTIO with %s status %x "
3619
			    "received (state %x, se_cmd %p)\n", vha->vp_idx,
3620
			    logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3621 3622
			    status, cmd->state, se_cmd);

3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633
			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;
				qlt_schedule_sess_for_deletion(cmd->sess, true);
			}
			break;
		}
3634 3635 3636 3637 3638 3639 3640 3641 3642 3643
		case CTIO_SRR_RECEIVED:
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
			    "qla_target(%d): CTIO with SRR_RECEIVED"
			    " status %x received (state %x, se_cmd %p)\n",
			    vha->vp_idx, status, cmd->state, se_cmd);
			if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
				break;
			else
				return;

3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674
		case CTIO_DIF_ERROR: {
			struct ctio_crc_from_fw *crc =
				(struct ctio_crc_from_fw *)ctio;
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
			    "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
			    vha->vp_idx, status, cmd->state, se_cmd,
			    *((u64 *)&crc->actual_dif[0]),
			    *((u64 *)&crc->expected_dif[0]));

			if (qlt_handle_dif_error(vha, cmd, ctio)) {
				if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
					/* scsi Write/xfer rdy complete */
					goto skip_term;
				} else {
					/* scsi read/xmit respond complete
					 * call handle dif to send scsi status
					 * rather than terminate exchange.
					 */
					cmd->state = QLA_TGT_STATE_PROCESSED;
					ha->tgt.tgt_ops->handle_dif_err(cmd);
					return;
				}
			} else {
				/* Need to generate a SCSI good completion.
				 * because FW did not send scsi status.
				 */
				status = 0;
				goto skip_term;
			}
			break;
		}
3675 3676
		default:
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3677
			    "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3678 3679 3680 3681
			    vha->vp_idx, status, cmd->state, se_cmd);
			break;
		}

3682

3683
		/* "cmd->aborted" means
3684 3685 3686 3687 3688 3689
		 * 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) &&
3690
		    (!cmd->aborted)) {
3691
			cmd->cmd_flags |= BIT_13;
3692 3693
			if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
				return;
3694
		}
3695
	}
3696
skip_term:
3697 3698

	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
Q
Quinn Tran 已提交
3699
		cmd->cmd_flags |= BIT_12;
3700 3701 3702
	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
		cmd->state = QLA_TGT_STATE_DATA_IN;

3703
		if (status == CTIO_SUCCESS)
3704 3705 3706 3707
			cmd->write_data_transferred = 1;

		ha->tgt.tgt_ops->handle_data(cmd);
		return;
3708
	} else if (cmd->aborted) {
Q
Quinn Tran 已提交
3709
		cmd->cmd_flags |= BIT_18;
3710
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3711
		  "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3712
	} else {
Q
Quinn Tran 已提交
3713
		cmd->cmd_flags |= BIT_19;
3714 3715 3716 3717 3718
		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);
	}

3719
	if (unlikely(status != CTIO_SUCCESS) &&
3720
		!cmd->aborted) {
3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734
		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
3735
		fcp_task_attr = TCM_SIMPLE_TAG;
3736 3737
		break;
	case ATIO_HEAD_OF_QUEUE:
C
Christoph Hellwig 已提交
3738
		fcp_task_attr = TCM_HEAD_TAG;
3739 3740
		break;
	case ATIO_ORDERED_QUEUE:
C
Christoph Hellwig 已提交
3741
		fcp_task_attr = TCM_ORDERED_TAG;
3742 3743
		break;
	case ATIO_ACA_QUEUE:
C
Christoph Hellwig 已提交
3744
		fcp_task_attr = TCM_ACA_TAG;
3745 3746
		break;
	case ATIO_UNTAGGED:
C
Christoph Hellwig 已提交
3747
		fcp_task_attr = TCM_SIMPLE_TAG;
3748 3749 3750 3751 3752
		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
3753
		fcp_task_attr = TCM_ORDERED_TAG;
3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764
		break;
	}

	return fcp_task_attr;
}

static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
					uint8_t *);
/*
 * Process context for I/O path into tcm_qla2xxx code
 */
3765
static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3766 3767 3768
{
	scsi_qla_host_t *vha = cmd->vha;
	struct qla_hw_data *ha = vha->hw;
3769
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3770
	struct qla_tgt_sess *sess = cmd->sess;
3771 3772 3773 3774 3775 3776
	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;

3777 3778
	cmd->cmd_in_wq = 0;
	cmd->cmd_flags |= BIT_1;
3779 3780 3781
	if (tgt->tgt_stop)
		goto out_term;

3782
	if (cmd->aborted) {
3783 3784 3785 3786 3787 3788
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
		    "cmd with tag %u is aborted\n",
		    cmd->atio.u.isp24.exchange_addr);
		goto out_term;
	}

3789
	spin_lock_init(&cmd->cmd_lock);
3790
	cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3791
	cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811
	cmd->unpacked_lun = scsilun_to_int(
	    (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);

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

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

3812 3813
	ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
				          fcp_task_attr, data_dir, bidi);
3814 3815 3816 3817 3818
	if (ret != 0)
		goto out_term;
	/*
	 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
	 */
3819
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3820
	ha->tgt.tgt_ops->put_sess(sess);
3821
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3822 3823 3824
	return;

out_term:
3825
	ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3826
	/*
3827 3828
	 * cmd has not sent to target yet, so pass NULL as the second
	 * argument to qlt_send_term_exchange() and free the memory here.
3829
	 */
3830
	cmd->cmd_flags |= BIT_2;
3831
	spin_lock_irqsave(&ha->hardware_lock, flags);
3832
	qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
3833 3834

	qlt_decr_num_pend_cmds(vha);
3835 3836
	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
3837 3838 3839 3840

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
	ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3841 3842 3843 3844 3845
}

static void qlt_do_work(struct work_struct *work)
{
	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3846 3847 3848 3849 3850 3851
	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);
3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873

	__qlt_do_work(cmd);
}

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

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

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

	memcpy(&cmd->atio, atio, sizeof(*atio));
	cmd->state = QLA_TGT_STATE_NEW;
	cmd->tgt = vha->vha_tgt.qla_tgt;
3874
	qlt_incr_num_pend_cmds(vha);
3875 3876 3877 3878 3879 3880
	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;

3881 3882 3883 3884 3885
	cmd->cmd_flags = 0;
	cmd->jiffies_at_alloc = get_jiffies_64();

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

3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902
	return cmd;
}

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

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

3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913
	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;
	}

3914
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3915 3916 3917
	    "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]);
3918 3919 3920

	if (op->atio.u.raw.entry_count > 1) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3921
		    "Dropping multy entry atio %p\n", &op->atio);
3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938
		goto out_term;
	}

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

	if (!sess)
		goto out_term;
	/*
	 * Now obtain a pre-allocated session tag using the original op->atio
	 * packet header, and dispatch into __qlt_do_work() using the existing
	 * process context.
	 */
	cmd = qlt_get_tag(vha, sess, &op->atio);
	if (!cmd) {
		spin_lock_irqsave(&ha->hardware_lock, flags);
		qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3939
		ha->tgt.tgt_ops->put_sess(sess);
3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
		kfree(op);
		return;
	}
	/*
	 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
	 * the extra reference taken above by qlt_make_local_sess()
	 */
	__qlt_do_work(cmd);
	kfree(op);
	return;

out_term:
	spin_lock_irqsave(&ha->hardware_lock, flags);
3954
	qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
3955
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
3956 3957
	kfree(op);

3958 3959 3960 3961 3962 3963
}

/* 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)
{
3964
	struct qla_hw_data *ha = vha->hw;
3965
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3966
	struct qla_tgt_sess *sess;
3967 3968 3969
	struct qla_tgt_cmd *cmd;

	if (unlikely(tgt->tgt_stop)) {
3970
		ql_dbg(ql_dbg_io, vha, 0x3061,
3971 3972 3973 3974
		    "New command while device %p is shutting down\n", tgt);
		return -EFAULT;
	}

3975 3976 3977 3978 3979 3980 3981 3982
	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));
3983
		op->vha = vha;
3984 3985 3986 3987 3988

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

3989 3990 3991 3992
		INIT_WORK(&op->work, qlt_create_sess_from_atio);
		queue_work(qla_tgt_wq, &op->work);
		return 0;
	}
3993 3994 3995 3996 3997 3998 3999 4000 4001 4002

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

4003 4004 4005 4006 4007 4008
	/*
	 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
	 */
	kref_get(&sess->se_sess->sess_kref);

	cmd = qlt_get_tag(vha, sess, atio);
4009
	if (!cmd) {
4010
		ql_dbg(ql_dbg_io, vha, 0x3062,
4011
		    "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4012
		ha->tgt.tgt_ops->put_sess(sess);
4013 4014 4015
		return -ENOMEM;
	}

4016 4017
	cmd->cmd_in_wq = 1;
	cmd->cmd_flags |= BIT_0;
4018 4019
	cmd->se_cmd.cpuid = ha->msix_count ?
		ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4020 4021 4022 4023 4024

	spin_lock(&vha->cmd_list_lock);
	list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
	spin_unlock(&vha->cmd_list_lock);

4025
	INIT_WORK(&cmd->work, qlt_do_work);
4026 4027 4028 4029 4030 4031 4032 4033 4034 4035
	if (ha->msix_count) {
		if (cmd->atio.u.isp24.fcp_cmnd.rddata)
			queue_work_on(smp_processor_id(), qla_tgt_wq,
			    &cmd->work);
		else
			queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
			    &cmd->work);
	} else {
		queue_work(qla_tgt_wq, &cmd->work);
	}
4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046
	return 0;

}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
	int fn, void *iocb, int flags)
{
	struct scsi_qla_host *vha = sess->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_mgmt_cmd *mcmd;
4047
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067
	int res;
	uint8_t tmr_func;

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

	if (iocb) {
		memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
		    sizeof(mcmd->orig_iocb.imm_ntfy));
	}
	mcmd->tmr_func = fn;
	mcmd->flags = flags;
4068
	mcmd->reset_count = vha->hw->chip_reset;
4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087

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

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

	case QLA_TGT_LUN_RESET:
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
		    "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
		tmr_func = TMR_LUN_RESET;
4088
		abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157
		break;

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

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

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

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

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

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

	return 0;
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
{
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt *tgt;
	struct qla_tgt_sess *sess;
	uint32_t lun, unpacked_lun;
4158
	int fn;
4159
	unsigned long flags;
4160

4161
	tgt = vha->vha_tgt.qla_tgt;
4162 4163 4164

	lun = a->u.isp24.fcp_cmnd.lun;
	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4165 4166

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4167 4168
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    a->u.isp24.fcp_hdr.s_id);
4169 4170
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

4171 4172 4173 4174 4175 4176 4177 4178 4179 4180
	unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);

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

4181 4182 4183
	if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
		return -EFAULT;

4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211
	return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
}

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

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

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

	lun = a->u.isp24.fcp_cmnd.lun;
	unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4212
	mcmd->reset_count = vha->hw->chip_reset;
4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233

	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
	    le16_to_cpu(iocb->u.isp2x.seq_id));
	if (rc != 0) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
		    "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
		    vha->vp_idx, rc);
		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
		return -EFAULT;
	}

	return 0;
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_abort_task(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb)
{
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess;
	int loop_id;
4234
	unsigned long flags;
4235 4236 4237

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

4238
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4239
	sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4240 4241
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

4242 4243 4244 4245
	if (sess == NULL) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
		    "qla_target(%d): task abort for unexisting "
		    "session\n", vha->vp_idx);
4246
		return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4247 4248 4249 4250 4251 4252
		    QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
	}

	return __qlt_abort_task(vha, iocb, sess);
}

4253 4254 4255 4256
void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
{
	if (fcport->tgt_session) {
		if (rc != MBS_COMMAND_COMPLETE) {
4257
			ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281
				"%s: se_sess %p / sess %p from"
				" port %8phC loop_id %#04x s_id %02x:%02x:%02x"
				" LOGO failed: %#x\n",
				__func__,
				fcport->tgt_session->se_sess,
				fcport->tgt_session,
				fcport->port_name, fcport->loop_id,
				fcport->d_id.b.domain, fcport->d_id.b.area,
				fcport->d_id.b.al_pa, rc);
		}

		fcport->tgt_session->logout_completed = 1;
	}
}

/*
* 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.
*/
static struct qla_tgt_sess *
qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4282
    port_id_t port_id, uint16_t loop_id, struct qla_tgt_sess **conflict_sess)
4283 4284 4285 4286
{
	struct qla_tgt_sess *sess = NULL, *other_sess;
	uint64_t other_wwn;

4287 4288
	*conflict_sess = NULL;

4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315
	list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {

		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 */
		if (port_id.b24 == other_sess->s_id.b24) {
			if (loop_id != other_sess->loop_id) {
				ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
				    "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
4316
				 * kill the session, but don't free the loop_id
4317
				 */
4318 4319
				other_sess->keep_nport_handle = 1;
				*conflict_sess = other_sess;
4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340
				qlt_schedule_sess_for_deletion(other_sess,
				    true);
			}
			continue;
		}

		/* find other sess with nport handle collision */
		if (loop_id == other_sess->loop_id) {
			ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
			       "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;
}

4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363
/* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
{
	struct qla_tgt_sess_op *op;
	struct qla_tgt_cmd *cmd;
	uint32_t key;
	int count = 0;

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

	spin_lock(&vha->cmd_list_lock);
	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
		uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
		if (op_key == key) {
			op->aborted = true;
			count++;
		}
	}
	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) {
4364
			cmd->aborted = 1;
4365 4366 4367 4368 4369 4370 4371 4372
			count++;
		}
	}
	spin_unlock(&vha->cmd_list_lock);

	return count;
}

4373 4374 4375 4376 4377 4378
/*
 * 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)
{
4379
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4380
	struct qla_hw_data *ha = vha->hw;
4381
	struct qla_tgt_sess *sess = NULL, *conflict_sess = NULL;
4382 4383 4384 4385
	uint64_t wwn;
	port_id_t port_id;
	uint16_t loop_id;
	uint16_t wd3_lo;
4386
	int res = 0;
4387
	qlt_plogi_ack_t *pla;
4388
	unsigned long flags;
4389

4390 4391 4392 4393 4394 4395 4396 4397 4398
	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);

4399
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4400 4401
	    "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
	    vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4402

4403 4404 4405
	/* res = 1 means ack at the end of thread
	 * res = 0 means ack async/later.
	 */
4406 4407
	switch (iocb->u.isp24.status_subcode) {
	case ELS_PLOGI:
4408

4409 4410 4411
		/* Mark all stale commands in qla_tgt_wq for deletion */
		abort_cmds_for_s_id(vha, &port_id);

4412 4413
		if (wwn) {
			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4414
			sess = qlt_find_sess_invalidate_other(tgt, wwn,
4415
			    port_id, loop_id, &conflict_sess);
4416 4417
			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
		}
4418

4419
		if (IS_SW_RESV_ADDR(port_id) || (!sess && !conflict_sess)) {
4420 4421 4422 4423
			res = 1;
			break;
		}

4424 4425
		pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
		if (!pla) {
4426 4427 4428 4429 4430 4431 4432 4433
			qlt_send_term_imm_notif(vha, iocb, 1);

			res = 0;
			break;
		}

		res = 0;

4434 4435 4436
		if (conflict_sess)
			qlt_plogi_ack_link(vha, pla, conflict_sess,
			    QLT_PLOGI_LINK_CONFLICT);
4437

4438 4439 4440 4441
		if (!sess)
			break;

		qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464
		 /*
		  * 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->s_id.b24 == port_id.b24));
		qlt_schedule_sess_for_deletion(sess, true);
		break;

4465
	case ELS_PRLI:
4466 4467
		wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);

4468 4469
		if (wwn) {
			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4470
			sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4471
			    loop_id, &conflict_sess);
4472 4473
			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
		}
4474 4475 4476 4477 4478 4479 4480 4481 4482

		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;
		}
4483 4484 4485 4486 4487 4488 4489 4490

		if (sess != NULL) {
			if (sess->deleted) {
				/*
				 * Impatient initiator sent PRLI before last
				 * PLOGI could finish. Will force him to re-try,
				 * while last one finishes.
				 */
4491
				ql_log(ql_log_warn, sess->vha, 0xf095,
4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502
				    "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
			 */
4503
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4504 4505 4506 4507 4508 4509 4510 4511 4512 4513
			    "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;
			sess->s_id = port_id;

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

4514 4515 4516 4517 4518 4519 4520 4521
		}
		res = 1; /* send notify ack */

		/* Make session global (not used in fabric mode) */
		if (ha->current_topology != ISP_CFG_F) {
			set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
			set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
			qla2xxx_wake_dpc(vha);
4522 4523 4524 4525 4526 4527 4528
		} else {
			/* todo: else - create sess here. */
			res = 1; /* send notify ack */
		}

		break;

4529 4530 4531 4532 4533 4534 4535
	case ELS_LOGO:
	case ELS_PRLO:
		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
		break;
	case ELS_PDISC:
	case ELS_ADISC:
	{
4536
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4537 4538 4539 4540 4541 4542 4543 4544 4545
		if (tgt->link_reinit_iocb_pending) {
			qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
			    0, 0, 0, 0, 0, 0);
			tgt->link_reinit_iocb_pending = 0;
		}
		res = 1; /* send notify ack */
		break;
	}

4546
	case ELS_FLOGI:	/* should never happen */
4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559
	default:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
		    "qla_target(%d): Unsupported ELS command %x "
		    "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
		break;
	}

	return res;
}

static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
{
4560 4561 4562 4563 4564 4565 4566 4567
#if 1
	/*
	 * FIXME: Reject non zero SRR relative offset until we can test
	 * this code properly.
	 */
	pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
	return -1;
#else
4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658
	struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
	size_t first_offset = 0, rem_offset = offset, tmp = 0;
	int i, sg_srr_cnt, bufflen = 0;

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

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

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

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

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

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

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

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

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

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

	return 0;
4659
#endif
4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740
}

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

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

	*xmit_type = QLA_TGT_XMIT_ALL;

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

	return res;
}

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

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

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

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

		if (qlt_has_data(cmd)) {
			if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
				goto out_reject;
			spin_lock_irqsave(&ha->hardware_lock, flags);
			qlt_send_notify_ack(vha, ntfy,
			    0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			resp = 1;
		} else {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4741 4742
			       "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
			       vha->vp_idx, se_cmd->tag,
4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769
			    cmd->se_cmd.scsi_status);
			goto out_reject;
		}
		break;
	case SRR_IU_DATA_OUT:
		if (!cmd->sg || !cmd->sg_cnt) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
			    "Unable to process SRR_IU_DATA_OUT due to"
			    " missing cmd->sg\n");
			dump_stack();
			goto out_reject;
		}
		if (se_cmd->scsi_status != 0) {
			ql_dbg(ql_dbg_tgt, vha, 0xe02b,
			    "Rejecting SRR_IU_DATA_OUT"
			    " with non GOOD scsi_status\n");
			goto out_reject;
		}
		cmd->bufflen = se_cmd->data_length;

		if (qlt_has_data(cmd)) {
			if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
				goto out_reject;
			spin_lock_irqsave(&ha->hardware_lock, flags);
			qlt_send_notify_ack(vha, ntfy,
			    0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
4770 4771
			if (xmit_type & QLA_TGT_XMIT_DATA) {
				cmd->cmd_flags |= BIT_8;
4772
				qlt_rdy_to_xfer(cmd);
4773
			}
4774 4775
		} else {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4776 4777
			    "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
			       vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788
			goto out_reject;
		}
		break;
	default:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
		    "qla_target(%d): Unknown srr_ui value %x",
		    vha->vp_idx, srr_ui);
		goto out_reject;
	}

	/* Transmit response in case of status and data-in cases */
4789 4790
	if (resp) {
		cmd->cmd_flags |= BIT_7;
4791
		qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4792
	}
4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804

	return;

out_reject:
	spin_lock_irqsave(&ha->hardware_lock, flags);
	qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
	    NOTIFY_ACK_SRR_FLAGS_REJECT,
	    NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
	    NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
	if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
		cmd->state = QLA_TGT_STATE_DATA_IN;
		dump_stack();
4805 4806
	} else {
		cmd->cmd_flags |= BIT_9;
4807
		qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
4808
	}
4809 4810 4811 4812 4813 4814 4815 4816 4817
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

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

4818
#ifndef __CHECKER__
4819 4820
	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);
4821
#endif
4822 4823 4824 4825 4826 4827

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

4828
#ifndef __CHECKER__
4829 4830
	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
4831
#endif
4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901

	kfree(imm);
}

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

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

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

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

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

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

		spin_unlock_irqrestore(&tgt->srr_lock, flags);

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

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

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4902 4903 4904
		       "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
		       cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
		       se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919

		qlt_handle_srr(vha, sctio, imm);

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

/* ha->hardware_lock supposed to be held on entry */
static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb)
{
	struct qla_tgt_srr_imm *imm;
4920
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4921 4922 4923 4924
	struct qla_tgt_srr_ctio *sctio;

	tgt->imm_srr_id++;

4925
	ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985
	    vha->vp_idx);

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

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

				kfree(imm);

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

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

		/* IRQ is already OFF */
		spin_lock(&tgt->srr_lock);
		list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
		    srr_list_entry) {
			if (sctio->srr_id == tgt->imm_srr_id) {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
				    "CTIO SRR %p deleted (id %d)\n",
				    sctio, sctio->srr_id);
				list_del(&sctio->srr_list_entry);
				qlt_send_term_exchange(vha, sctio->cmd,
4986
				    &sctio->cmd->atio, 1, 0);
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
				kfree(sctio);
			}
		}
		spin_unlock(&tgt->srr_lock);
		goto out_reject;
	}

	return;

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

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

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

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

	case IMM_NTFY_LIP_LINK_REINIT:
	{
5030
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
		    "qla_target(%d): LINK REINIT (loop %#x, "
		    "subcode %x)\n", vha->vp_idx,
		    le16_to_cpu(iocb->u.isp24.nport_handle),
		    iocb->u.isp24.status_subcode);
		if (tgt->link_reinit_iocb_pending) {
			qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
			    0, 0, 0, 0, 0, 0);
		}
		memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
		tgt->link_reinit_iocb_pending = 1;
		/*
		 * QLogic requires to wait after LINK REINIT for possible
		 * PDISC or ADISC ELS commands
		 */
		send_notify_ack = 0;
		break;
	}

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

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

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

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

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

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

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

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

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

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

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

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

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

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 * This function sends busy to ISP 2xxx or 24xx.
 */
5145
static int __qlt_send_busy(struct scsi_qla_host *vha,
5146 5147 5148 5149 5150 5151
	struct atio_from_isp *atio, uint16_t status)
{
	struct ctio7_to_24xx *ctio24;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	struct qla_tgt_sess *sess = NULL;
5152
	unsigned long flags;
5153

5154
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5155 5156
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    atio->u.isp24.fcp_hdr.s_id);
5157
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5158
	if (!sess) {
5159
		qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5160
		return 0;
5161 5162 5163 5164 5165
	}
	/* Sending marker isn't necessary, since we called from ISR */

	pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
	if (!pkt) {
5166
		ql_dbg(ql_dbg_io, vha, 0x3063,
5167 5168
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet", vha->vp_idx, __func__);
5169
		return -ENOMEM;
5170 5171
	}

5172
	vha->tgt_counters.num_q_full_sent++;
5173 5174 5175 5176 5177 5178
	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;
5179
	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5180 5181 5182 5183 5184 5185
	ctio24->vp_index = vha->vp_idx;
	ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
	ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
5186
	    cpu_to_le16(
5187 5188 5189 5190 5191 5192 5193 5194
		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
		CTIO7_FLAGS_DONT_RET_CTIO);
	/*
	 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
	 * if the explicit conformation is used.
	 */
	ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
	ctio24->u.status1.scsi_status = cpu_to_le16(status);
5195 5196
	/* Memory Barrier */
	wmb();
5197
	qla2x00_start_iocbs(vha, vha->req);
5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339 5340 5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380
	return 0;
}

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

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

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

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

		qlt_chk_exch_leak_thresh_hold(vha);
		return;
	}

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

	se_sess = sess->se_sess;

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

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

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

		qlt_chk_exch_leak_thresh_hold(vha);
		return;
	}

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

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

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

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

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

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

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

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

	INIT_LIST_HEAD(&free_list);

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

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

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

		if (rc == -ENOMEM)
			break;

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

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

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

	cmd = NULL;

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

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

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

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

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

	status = temp_sam_status;
	qlt_send_busy(vha, atio, status);
	return 1;
5381 5382 5383 5384 5385
}

/* 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,
5386
	struct atio_from_isp *atio, uint8_t ha_locked)
5387 5388
{
	struct qla_hw_data *ha = vha->hw;
5389
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5390
	int rc;
5391
	unsigned long flags;
5392 5393

	if (unlikely(tgt == NULL)) {
5394
		ql_dbg(ql_dbg_io, vha, 0x3064,
5395 5396 5397 5398 5399 5400 5401 5402
		    "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.
	 */

5403
	tgt->atio_irq_cmd_count++;
5404 5405 5406 5407 5408

	switch (atio->u.raw.entry_type) {
	case ATIO_TYPE7:
		if (unlikely(atio->u.isp24.exchange_addr ==
		    ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5409
			ql_dbg(ql_dbg_io, vha, 0x3065,
5410 5411 5412
			    "qla_target(%d): ATIO_TYPE7 "
			    "received with UNKNOWN exchange address, "
			    "sending QUEUE_FULL\n", vha->vp_idx);
5413 5414
			if (!ha_locked)
				spin_lock_irqsave(&ha->hardware_lock, flags);
5415
			qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5416 5417
			if (!ha_locked)
				spin_unlock_irqrestore(&ha->hardware_lock, flags);
5418 5419
			break;
		}
5420 5421 5422 5423 5424 5425



		if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
			rc = qlt_chk_qfull_thresh_hold(vha, atio);
			if (rc != 0) {
5426
				tgt->atio_irq_cmd_count--;
5427 5428
				return;
			}
5429
			rc = qlt_handle_cmd_for_atio(vha, atio);
5430
		} else {
5431
			rc = qlt_handle_task_mgmt(vha, atio);
5432
		}
5433 5434
		if (unlikely(rc != 0)) {
			if (rc == -ESRCH) {
5435 5436 5437 5438
				if (!ha_locked)
					spin_lock_irqsave
						(&ha->hardware_lock, flags);

5439 5440 5441
#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
				qlt_send_busy(vha, atio, SAM_STAT_BUSY);
#else
5442
				qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5443
#endif
5444 5445 5446 5447 5448

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

5449 5450 5451 5452 5453 5454 5455 5456 5457 5458 5459
			} 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);
5460 5461 5462
					if (!ha_locked)
						spin_lock_irqsave(
						    &ha->hardware_lock, flags);
5463
					qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5464 5465 5466
					if (!ha_locked)
						spin_unlock_irqrestore(
						    &ha->hardware_lock, flags);
5467 5468 5469 5470 5471 5472 5473 5474 5475 5476 5477 5478 5479 5480 5481 5482
				}
			}
		}
		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");
5483 5484 5485

		if (!ha_locked)
			spin_lock_irqsave(&ha->hardware_lock, flags);
5486
		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5487 5488
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
5489 5490 5491 5492 5493 5494 5495 5496 5497 5498
		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;
	}

5499
	tgt->atio_irq_cmd_count--;
5500 5501 5502 5503 5504 5505 5506
}

/* ha->hardware_lock supposed to be held on entry */
/* called via callback from qla2xxx */
static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
{
	struct qla_hw_data *ha = vha->hw;
5507
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5508 5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523

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

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

	tgt->irq_cmd_count++;

	switch (pkt->entry_type) {
5524
	case CTIO_CRC2:
5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536 5537 5538
	case CTIO_TYPE7:
	{
		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
		qlt_do_ctio_completion(vha, entry->handle,
		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
		    entry);
		break;
	}

	case ACCEPT_TGT_IO_TYPE:
	{
		struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
		int rc;
		if (atio->u.isp2x.status !=
5539
		    cpu_to_le16(ATIO_CDB_VALID)) {
5540 5541 5542 5543 5544 5545 5546
			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;
		}

5547 5548 5549 5550 5551 5552
		rc = qlt_chk_qfull_thresh_hold(vha, atio);
		if (rc != 0) {
			tgt->irq_cmd_count--;
			return;
		}

5553 5554 5555 5556 5557 5558
		rc = qlt_handle_cmd_for_atio(vha, atio);
		if (unlikely(rc != 0)) {
			if (rc == -ESRCH) {
#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
				qlt_send_busy(vha, atio, 0);
#else
5559
				qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5560 5561 5562 5563 5564 5565 5566 5567
#endif
			} else {
				if (tgt->tgt_stop) {
					ql_dbg(ql_dbg_tgt, vha, 0xe05f,
					    "qla_target: Unable to send "
					    "command to target, sending TERM "
					    "EXCHANGE for rsp\n");
					qlt_send_term_exchange(vha, NULL,
5568
					    atio, 1, 0);
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
				} else {
					ql_dbg(ql_dbg_tgt, vha, 0xe060,
					    "qla_target(%d): Unable to send "
					    "command to target, sending BUSY "
					    "status\n", vha->vp_idx);
					qlt_send_busy(vha, atio, 0);
				}
			}
		}
	}
	break;

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

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

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

	case NOTIFY_ACK_TYPE:
		if (tgt->notify_ack_expected > 0) {
			struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
			ql_dbg(ql_dbg_tgt, vha, 0xe036,
			    "NOTIFY_ACK seq %08x status %x\n",
			    le16_to_cpu(entry->u.isp2x.seq_id),
			    le16_to_cpu(entry->u.isp2x.status));
			tgt->notify_ack_expected--;
			if (entry->u.isp2x.status !=
5613
			    cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5614 5615 5616 5617 5618 5619 5620 5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653 5654 5655 5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 5689 5690 5691 5692
				ql_dbg(ql_dbg_tgt, vha, 0xe061,
				    "qla_target(%d): NOTIFY_ACK "
				    "failed %x\n", vha->vp_idx,
				    le16_to_cpu(entry->u.isp2x.status));
			}
		} else {
			ql_dbg(ql_dbg_tgt, vha, 0xe062,
			    "qla_target(%d): Unexpected NOTIFY_ACK received\n",
			    vha->vp_idx);
		}
		break;

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

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

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

	tgt->irq_cmd_count--;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
	uint16_t *mailbox)
{
	struct qla_hw_data *ha = vha->hw;
5693
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5694
	int login_code;
5695 5696 5697 5698 5699 5700 5701 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713 5714 5715 5716 5717 5718 5719 5720 5721

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

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

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

	tgt->irq_cmd_count++;

	switch (code) {
	case MBA_RESET:			/* Reset */
	case MBA_SYSTEM_ERR:		/* System Error */
	case MBA_REQ_TRANSFER_ERR:	/* Request Transfer Error */
	case MBA_RSP_TRANSFER_ERR:	/* Response Transfer Error */
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
		    "qla_target(%d): System error async event %#x "
5722
		    "occurred", vha->vp_idx, code);
5723 5724 5725 5726 5727 5728 5729 5730
		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,
5731
		    "qla_target(%d): Async LOOP_UP occurred "
5732 5733 5734
		    "(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]));
5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747
		if (tgt->link_reinit_iocb_pending) {
			qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
			    0, 0, 0, 0, 0, 0);
			tgt->link_reinit_iocb_pending = 0;
		}
		break;
	}

	case MBA_LIP_OCCURRED:
	case MBA_LOOP_DOWN:
	case MBA_LIP_RESET:
	case MBA_RSCN_UPDATE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5748
		    "qla_target(%d): Async event %#x occurred "
5749 5750 5751
		    "(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]));
5752 5753 5754 5755 5756
		break;

	case MBA_PORT_UPDATE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
		    "qla_target(%d): Port update async event %#x "
5757
		    "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5758 5759 5760 5761 5762 5763
		    "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));

		login_code = le16_to_cpu(mailbox[2]);
		if (login_code == 0x4)
5764 5765
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
			    "Async MB 2: Got PLOGI Complete\n");
5766
		else if (login_code == 0x7)
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 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
			    "Async MB 2: Port Logged Out\n");
		break;

	default:
		break;
	}

	tgt->irq_cmd_count--;
}

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

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

	fcport->loop_id = loop_id;

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

	return fcport;
}

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

5816 5817
	mutex_lock(&vha->vha_tgt.tgt_mutex);

5818
retry:
5819 5820
	global_resets =
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5821 5822 5823

	rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
	if (rc != 0) {
5824 5825
		mutex_unlock(&vha->vha_tgt.tgt_mutex);

5826 5827 5828 5829 5830 5831 5832 5833 5834 5835
		if ((s_id[0] == 0xFF) &&
		    (s_id[1] == 0xFC)) {
			/*
			 * This is Domain Controller, so it should be
			 * OK to drop SCSI commands from it.
			 */
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
			    "Unable to find initiator with S_ID %x:%x:%x",
			    s_id[0], s_id[1], s_id[2]);
		} else
5836
			ql_log(ql_log_info, vha, 0xf071,
5837 5838 5839 5840
			    "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]);
5841 5842 5843 5844 5845 5846 5847 5848

		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);
		}

5849 5850 5851 5852
		return NULL;
	}

	fcport = qlt_get_port_database(vha, loop_id);
5853 5854
	if (!fcport) {
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
5855
		return NULL;
5856
	}
5857 5858

	if (global_resets !=
5859
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5860 5861 5862 5863
		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,
5864 5865
		    atomic_read(&vha->vha_tgt.
			qla_tgt->tgt_global_resets_count));
5866 5867 5868 5869 5870
		goto retry;
	}

	sess = qlt_create_sess(vha, fcport, true);

5871 5872
	mutex_unlock(&vha->vha_tgt.tgt_mutex);

5873 5874 5875 5876 5877 5878 5879 5880 5881 5882
	kfree(fcport);
	return sess;
}

static void qlt_abort_work(struct qla_tgt *tgt,
	struct qla_tgt_sess_work_param *prm)
{
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess = NULL;
5883
	unsigned long flags = 0, flags2 = 0;
5884 5885 5886 5887
	uint32_t be_s_id;
	uint8_t s_id[3];
	int rc;

5888
	spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5889 5890

	if (tgt->tgt_stop)
5891
		goto out_term2;
5892 5893 5894 5895 5896 5897 5898 5899

	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) {
5900
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5901 5902 5903 5904

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

5905
		spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5906
		if (!sess)
5907
			goto out_term2;
5908
	} else {
5909 5910
		if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
			sess = NULL;
5911
			goto out_term2;
5912 5913
		}

5914 5915 5916
		kref_get(&sess->se_sess->sess_kref);
	}

5917 5918
	spin_lock_irqsave(&ha->hardware_lock, flags);

5919 5920 5921 5922 5923 5924
	if (tgt->tgt_stop)
		goto out_term;

	rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
	if (rc != 0)
		goto out_term;
5925
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
5926 5927

	ha->tgt.tgt_ops->put_sess(sess);
5928
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5929 5930
	return;

5931 5932 5933
out_term2:
	spin_lock_irqsave(&ha->hardware_lock, flags);

5934 5935
out_term:
	qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5936 5937
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

5938 5939
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
5940
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5941 5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953
}

static void qlt_tmr_work(struct qla_tgt *tgt,
	struct qla_tgt_sess_work_param *prm)
{
	struct atio_from_isp *a = &prm->tm_iocb2;
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_sess *sess = NULL;
	unsigned long flags;
	uint8_t *s_id = NULL; /* to hide compiler warnings */
	int rc;
	uint32_t lun, unpacked_lun;
5954
	int fn;
5955 5956
	void *iocb;

5957
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5958 5959 5960 5961 5962 5963 5964

	if (tgt->tgt_stop)
		goto out_term;

	s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
	if (!sess) {
5965
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5966 5967 5968 5969

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

5970
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5971 5972 5973
		if (!sess)
			goto out_term;
	} else {
5974 5975 5976 5977 5978
		if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
			sess = NULL;
			goto out_term;
		}

5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989 5990 5991
		kref_get(&sess->se_sess->sess_kref);
	}

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

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

	ha->tgt.tgt_ops->put_sess(sess);
5992
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5993 5994 5995
	return;

out_term:
5996
	qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
5997 5998
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
5999
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6000 6001 6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 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
}

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

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

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

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

		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);

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

		spin_lock_irqsave(&tgt->sess_work_lock, flags);

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

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

	if (!QLA_TGT_MODE_ENABLED())
		return 0;

6051 6052 6053 6054 6055 6056
	if (!IS_TGT_MODE_CAPABLE(ha)) {
		ql_log(ql_log_warn, base_vha, 0xe070,
		    "This adapter does not support target mode.\n");
		return 0;
	}

6057
	ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6058
	    "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6059

6060
	BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086 6087

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

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

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

6088
	base_vha->vha_tgt.qla_tgt = tgt;
6089 6090 6091 6092 6093 6094 6095 6096 6097 6098

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

6099 6100 6101
	if (base_vha->fc_vport)
		return 0;

6102 6103 6104 6105 6106 6107 6108 6109 6110 6111
	mutex_lock(&qla_tgt_mutex);
	list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
	mutex_unlock(&qla_tgt_mutex);

	return 0;
}

/* Must be called under tgt_host_action_mutex */
int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
{
6112
	if (!vha->vha_tgt.qla_tgt)
6113 6114
		return 0;

6115 6116 6117 6118
	if (vha->fc_vport) {
		qlt_release(vha->vha_tgt.qla_tgt);
		return 0;
	}
6119 6120 6121 6122

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

6123
	mutex_lock(&qla_tgt_mutex);
6124
	list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6125 6126 6127 6128
	mutex_unlock(&qla_tgt_mutex);

	ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
	    vha->host_no, ha);
6129
	qlt_release(vha->vha_tgt.qla_tgt);
6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162

	return 0;
}

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

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

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

/**
 * qla_tgt_lport_register - register lport with external module
 *
 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
 * @wwpn: Passwd FC target WWPN
 * @callback:  lport initialization callback for tcm_qla2xxx code
 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
 */
6163 6164 6165
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))
6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177 6178 6179 6180 6181 6182 6183 6184 6185 6186 6187
{
	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);
6188
		if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6189 6190 6191 6192 6193
			pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
			    host->host_no);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			continue;
		}
6194 6195 6196 6197 6198 6199
		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;
		}
6200 6201 6202 6203 6204 6205 6206 6207
		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;
		}
6208
		qlt_lport_dump(vha, phys_wwpn, b);
6209 6210 6211 6212 6213

		if (memcmp(vha->port_name, b, WWN_SIZE)) {
			scsi_host_put(host);
			continue;
		}
6214 6215 6216 6217
		rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
		if (rc != 0)
			scsi_host_put(host);

6218
		mutex_unlock(&qla_tgt_mutex);
6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238
		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
	 */
6239
	vha->vha_tgt.target_lport_ptr = NULL;
6240 6241 6242 6243 6244 6245 6246 6247 6248
	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 */
6249
static void qlt_set_mode(struct scsi_qla_host *vha)
6250 6251 6252 6253 6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269
{
	struct qla_hw_data *ha = vha->hw;

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

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

/* Must be called under HW lock */
6270
static void qlt_clear_mode(struct scsi_qla_host *vha)
6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285 6286 6287 6288 6289 6290 6291 6292 6293 6294 6295 6296 6297 6298 6299 6300
{
	struct qla_hw_data *ha = vha->hw;

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

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

/*
 * qla_tgt_enable_vha - NO LOCK HELD
 *
 * host_reset, bring up w/ Target Mode Enabled
 */
void
qlt_enable_vha(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
6301
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6302
	unsigned long flags;
6303
	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6304
	int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318

	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);

6319 6320 6321 6322
	if (vha->vp_idx) {
		qla24xx_disable_vp(vha);
		qla24xx_enable_vp(vha);
	} else {
6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333
		if (ha->msix_entries) {
			ql_dbg(ql_dbg_tgt, vha, 0xffff,
			    "%s: host%ld : vector %d cpu %d\n",
			    __func__, vha->host_no,
			    ha->msix_entries[rspq_ent].vector,
			    ha->msix_entries[rspq_ent].cpuid);

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

6334 6335 6336 6337
		set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
		qla2xxx_wake_dpc(base_vha);
		qla2x00_wait_for_hba_online(base_vha);
	}
6338 6339 6340 6341 6342 6343 6344 6345
}
EXPORT_SYMBOL(qlt_enable_vha);

/*
 * qla_tgt_disable_vha - NO LOCK HELD
 *
 * Disable Target Mode and reset the adapter
 */
6346
static void qlt_disable_vha(struct scsi_qla_host *vha)
6347 6348
{
	struct qla_hw_data *ha = vha->hw;
6349
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375 6376 6377 6378 6379
	unsigned long flags;

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

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

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

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

6380 6381 6382 6383
	vha->vha_tgt.qla_tgt = NULL;

	mutex_init(&vha->vha_tgt.tgt_mutex);
	mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6384 6385 6386 6387 6388 6389 6390 6391 6392 6393

	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;
6394 6395

	qlt_add_target(ha, vha);
6396 6397 6398 6399 6400 6401 6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 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)) {
		if (qla_ini_mode_enabled(vha))
			ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
		else
			ct_req->req.rff_id.fc4_feature = BIT_0;
	} else if (qla_ini_mode_enabled(vha)) {
		ct_req->req.rff_id.fc4_feature = BIT_1;
	}
}

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

	if (!qla_tgt_mode_enabled(vha))
		return;

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

}

/*
 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
 * @ha: SCSI driver HA context
 */
void
6445
qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457
{
	struct qla_hw_data *ha = vha->hw;
	struct atio_from_isp *pkt;
	int cnt, i;

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

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

6458 6459
		qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt,
		    ha_locked);
6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471 6472 6473 6474 6475

		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 */
6476
	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6477
	RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6478 6479 6480
}

void
6481
qlt_24xx_config_rings(struct scsi_qla_host *vha)
6482 6483
{
	struct qla_hw_data *ha = vha->hw;
6484 6485
	if (!QLA_TGT_MODE_ENABLED())
		return;
6486

6487 6488 6489 6490 6491 6492 6493 6494 6495 6496 6497 6498
	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);
6499 6500 6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519
	}
}

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

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

6520
		nv->exchange_count = cpu_to_le16(0xFFFF);
6521 6522

		/* Enable target mode */
6523
		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6524 6525 6526

		/* Disable ini mode, if requested */
		if (!qla_ini_mode_enabled(vha))
6527
			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6528 6529

		/* Disable Full Login after LIP */
6530
		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6531
		/* Enable initial LIP */
6532
		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6533 6534 6535 6536 6537 6538 6539
		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);

6540
		/* Disable Full Login after LIP */
6541
		nv->host_p &= cpu_to_le32(~BIT_10);
6542
		/* Enable target PRLI control */
6543
		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6544 6545 6546 6547 6548 6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564
	} else {
		if (ha->tgt.saved_set) {
			nv->exchange_count = ha->tgt.saved_exchange_count;
			nv->firmware_options_1 =
			    ha->tgt.saved_firmware_options_1;
			nv->firmware_options_2 =
			    ha->tgt.saved_firmware_options_2;
			nv->firmware_options_3 =
			    ha->tgt.saved_firmware_options_3;
		}
		return;
	}

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

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

6565
		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6566 6567 6568 6569
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

6570
		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6571 6572 6573 6574 6575 6576 6577 6578 6579
	}
}

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
6580 6581 6582
	if (!QLA_TGT_MODE_ENABLED())
		return;

6583 6584
	if (ha->tgt.node_name_set) {
		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6585
		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6586
	}
Q
Quinn Tran 已提交
6587 6588 6589 6590 6591 6592 6593 6594

	/* 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);
	}
6595 6596
}

6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610 6611 6612 6613 6614 6615 6616 6617
void
qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
{
	struct qla_hw_data *ha = vha->hw;

	if (!QLA_TGT_MODE_ENABLED())
		return;

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

6618
		nv->exchange_count = cpu_to_le16(0xFFFF);
6619 6620

		/* Enable target mode */
6621
		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6622 6623 6624

		/* Disable ini mode, if requested */
		if (!qla_ini_mode_enabled(vha))
6625
			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6626 6627

		/* Disable Full Login after LIP */
6628
		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6629
		/* Enable initial LIP */
6630
		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6631 6632 6633 6634 6635 6636 6637
		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);

6638
		/* Disable Full Login after LIP */
6639
		nv->host_p &= cpu_to_le32(~BIT_10);
6640
		/* Enable target PRLI control */
6641
		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6642 6643 6644 6645 6646 6647 6648 6649 6650 6651 6652 6653 6654 6655 6656 6657 6658 6659 6660 6661 6662
	} else {
		if (ha->tgt.saved_set) {
			nv->exchange_count = ha->tgt.saved_exchange_count;
			nv->firmware_options_1 =
			    ha->tgt.saved_firmware_options_1;
			nv->firmware_options_2 =
			    ha->tgt.saved_firmware_options_2;
			nv->firmware_options_3 =
			    ha->tgt.saved_firmware_options_3;
		}
		return;
	}

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

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

6663
		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6664 6665 6666 6667
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

6668
		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682
	}
}

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);
6683
		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6684
	}
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6685 6686 6687 6688 6689 6690 6691 6692 6693

	/* 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);
	}

6694 6695 6696 6697 6698 6699 6700 6701 6702 6703 6704
}

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

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

6705 6706 6707 6708 6709 6710 6711 6712 6713
int
qlt_24xx_process_response_error(struct scsi_qla_host *vha,
	struct sts_entry_24xx *pkt)
{
	switch (pkt->entry_type) {
	case ABTS_RECV_24XX:
	case ABTS_RESP_24XX:
	case CTIO_TYPE7:
	case NOTIFY_ACK_TYPE:
6714
	case CTIO_CRC2:
6715 6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737
		return 1;
	default:
		return 0;
	}
}

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

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

6738
	if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6739 6740 6741 6742 6743 6744 6745
		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;
	}

6746 6747
	mutex_init(&base_vha->vha_tgt.tgt_mutex);
	mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6748 6749 6750
	qlt_clear_mode(base_vha);
}

6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762
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);

6763
	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6764

6765
	qlt_24xx_process_atio_queue(vha, 0);
6766

6767
	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6768 6769 6770 6771

	return IRQ_HANDLED;
}

6772 6773 6774 6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794 6795 6796 6797 6798 6799 6800 6801 6802 6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815
static void
qlt_handle_abts_recv_work(struct work_struct *work)
{
	struct qla_tgt_sess_op *op = container_of(work,
		struct qla_tgt_sess_op, work);
	scsi_qla_host_t *vha = op->vha;
	struct qla_hw_data *ha = vha->hw;
	unsigned long flags;

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

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

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

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

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

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

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

6816 6817 6818 6819 6820 6821 6822 6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858 6859 6860 6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876 6877 6878 6879 6880 6881 6882 6883 6884 6885 6886 6887 6888 6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906
int
qlt_mem_alloc(struct qla_hw_data *ha)
{
	if (!QLA_TGT_MODE_ENABLED())
		return 0;

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

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

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

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

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

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

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

	return true;
}

int __init qlt_init(void)
{
	int ret;

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

	if (!QLA_TGT_MODE_ENABLED())
		return 0;

	qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
	    sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
	    qla_tgt_mgmt_cmd), 0, NULL);
	if (!qla_tgt_mgmt_cmd_cachep) {
		ql_log(ql_log_fatal, NULL, 0xe06d,
		    "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6907
		return -ENOMEM;
6908 6909
	}

6910 6911 6912 6913 6914 6915 6916 6917 6918 6919 6920 6921
	qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
						 sizeof(qlt_plogi_ack_t),
						 __alignof__(qlt_plogi_ack_t),
						 0, NULL);

	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;
	}

6922 6923 6924 6925 6926 6927
	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;
6928
		goto out_plogi_cachep;
6929 6930 6931 6932 6933 6934 6935 6936 6937 6938 6939 6940 6941 6942 6943 6944
	}

	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);
6945 6946
out_plogi_cachep:
	kmem_cache_destroy(qla_tgt_plogi_cachep);
6947 6948 6949 6950 6951 6952 6953 6954 6955 6956 6957 6958
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);
6959
	kmem_cache_destroy(qla_tgt_plogi_cachep);
6960 6961
	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
}