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linux/drivers/scsi/qla2xxx/qla_target.c

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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
*
* Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
*
* 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"
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.");
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.");
int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
static int temp_sam_status = SAM_STAT_BUSY;
/*
* From scsi/fc/fc_fcp.h
*/
enum fcp_resp_rsp_codes {
FCP_TMF_CMPL = 0,
FCP_DATA_LEN_INVALID = 1,
FCP_CMND_FIELDS_INVALID = 2,
FCP_DATA_PARAM_MISMATCH = 3,
FCP_TMF_REJECTED = 4,
FCP_TMF_FAILED = 5,
FCP_TMF_INVALID_LUN = 9,
};
/*
* fc_pri_ta from scsi/fc/fc_fcp.h
*/
#define FCP_PTA_SIMPLE 0 /* simple task attribute */
#define FCP_PTA_HEADQ 1 /* head of queue task attribute */
#define FCP_PTA_ORDERED 2 /* ordered task attribute */
#define FCP_PTA_ACA 4 /* auto. contingent allegiance */
#define FCP_PTA_MASK 7 /* mask for task attribute field */
#define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */
#define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */
/*
* This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
* must be called under HW lock and could unlock/lock it inside.
* It isn't an issue, since in the current implementation on the time when
* those functions are called:
*
* - Either context is IRQ and only IRQ handler can modify HW data,
* including rings related fields,
*
* - Or access to target mode variables from struct qla_tgt doesn't
* cross those functions boundaries, except tgt_stop, which
* additionally protected by irq_cmd_count.
*/
/* Predefs for callbacks handed to qla2xxx LLD */
static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
struct atio_from_isp *pkt);
static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
int fn, void *iocb, int flags);
static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
*cmd, struct atio_from_isp *atio, int ha_locked);
static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
struct qla_tgt_srr_imm *imm, int ha_lock);
static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
struct qla_tgt_cmd *cmd);
static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
struct atio_from_isp *atio, uint16_t status, int qfull);
static void qlt_disable_vha(struct scsi_qla_host *vha);
/*
* Global Variables
*/
static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
static mempool_t *qla_tgt_mgmt_cmd_mempool;
static struct workqueue_struct *qla_tgt_wq;
static DEFINE_MUTEX(qla_tgt_mutex);
static LIST_HEAD(qla_tgt_glist);
/* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
static struct qla_tgt_sess *qlt_find_sess_by_port_name(
struct qla_tgt *tgt,
const uint8_t *port_name)
{
struct qla_tgt_sess *sess;
list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
if (!memcmp(sess->port_name, port_name, WWN_SIZE))
return sess;
}
return NULL;
}
/* Might release hw lock, then reaquire!! */
static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
{
/* Send marker if required */
if (unlikely(vha->marker_needed != 0)) {
int rc = qla2x00_issue_marker(vha, vha_locked);
if (rc != QLA_SUCCESS) {
ql_dbg(ql_dbg_tgt, vha, 0xe03d,
"qla_target(%d): issue_marker() failed\n",
vha->vp_idx);
}
return rc;
}
return QLA_SUCCESS;
}
static inline
struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
uint8_t *d_id)
{
struct qla_hw_data *ha = vha->hw;
uint8_t vp_idx;
if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
return NULL;
if (vha->d_id.b.al_pa == d_id[2])
return vha;
BUG_ON(ha->tgt.tgt_vp_map == NULL);
vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
if (likely(test_bit(vp_idx, ha->vp_idx_map)))
return ha->tgt.tgt_vp_map[vp_idx].vha;
return NULL;
}
static inline
struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
uint16_t vp_idx)
{
struct qla_hw_data *ha = vha->hw;
if (vha->vp_idx == vp_idx)
return vha;
BUG_ON(ha->tgt.tgt_vp_map == NULL);
if (likely(test_bit(vp_idx, ha->vp_idx_map)))
return ha->tgt.tgt_vp_map[vp_idx].vha;
return NULL;
}
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);
}
static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
struct atio_from_isp *atio)
{
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));
switch (atio->u.raw.entry_type) {
case ATIO_TYPE7:
{
struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
atio->u.isp24.fcp_hdr.d_id);
if (unlikely(NULL == host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe03e,
"qla_target(%d): Received ATIO_TYPE7 "
"with unknown d_id %x:%x:%x\n", vha->vp_idx,
atio->u.isp24.fcp_hdr.d_id[0],
atio->u.isp24.fcp_hdr.d_id[1],
atio->u.isp24.fcp_hdr.d_id[2]);
break;
}
qlt_24xx_atio_pkt(host, atio);
break;
}
case IMMED_NOTIFY_TYPE:
{
struct scsi_qla_host *host = vha;
struct imm_ntfy_from_isp *entry =
(struct imm_ntfy_from_isp *)atio;
if ((entry->u.isp24.vp_index != 0xFF) &&
(entry->u.isp24.nport_handle != 0xFFFF)) {
host = qlt_find_host_by_vp_idx(vha,
entry->u.isp24.vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe03f,
"qla_target(%d): Received "
"ATIO (IMMED_NOTIFY_TYPE) "
"with unknown vp_index %d\n",
vha->vp_idx, entry->u.isp24.vp_index);
break;
}
}
qlt_24xx_atio_pkt(host, atio);
break;
}
default:
ql_dbg(ql_dbg_tgt, vha, 0xe040,
"qla_target(%d): Received unknown ATIO atio "
"type %x\n", vha->vp_idx, atio->u.raw.entry_type);
break;
}
return;
}
void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
{
switch (pkt->entry_type) {
case CTIO_CRC2:
ql_dbg(ql_dbg_tgt, vha, 0xe073,
"qla_target(%d):%s: CRC2 Response pkt\n",
vha->vp_idx, __func__);
case CTIO_TYPE7:
{
struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
entry->vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe041,
"qla_target(%d): Response pkt (CTIO_TYPE7) "
"received, with unknown vp_index %d\n",
vha->vp_idx, entry->vp_index);
break;
}
qlt_response_pkt(host, pkt);
break;
}
case IMMED_NOTIFY_TYPE:
{
struct scsi_qla_host *host = vha;
struct imm_ntfy_from_isp *entry =
(struct imm_ntfy_from_isp *)pkt;
host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe042,
"qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
"received, with unknown vp_index %d\n",
vha->vp_idx, entry->u.isp24.vp_index);
break;
}
qlt_response_pkt(host, pkt);
break;
}
case NOTIFY_ACK_TYPE:
{
struct scsi_qla_host *host = vha;
struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
if (0xFF != entry->u.isp24.vp_index) {
host = qlt_find_host_by_vp_idx(vha,
entry->u.isp24.vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe043,
"qla_target(%d): Response "
"pkt (NOTIFY_ACK_TYPE) "
"received, with unknown "
"vp_index %d\n", vha->vp_idx,
entry->u.isp24.vp_index);
break;
}
}
qlt_response_pkt(host, pkt);
break;
}
case ABTS_RECV_24XX:
{
struct abts_recv_from_24xx *entry =
(struct abts_recv_from_24xx *)pkt;
struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
entry->vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe044,
"qla_target(%d): Response pkt "
"(ABTS_RECV_24XX) received, with unknown "
"vp_index %d\n", vha->vp_idx, entry->vp_index);
break;
}
qlt_response_pkt(host, pkt);
break;
}
case ABTS_RESP_24XX:
{
struct abts_resp_to_24xx *entry =
(struct abts_resp_to_24xx *)pkt;
struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
entry->vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe045,
"qla_target(%d): Response pkt "
"(ABTS_RECV_24XX) received, with unknown "
"vp_index %d\n", vha->vp_idx, entry->vp_index);
break;
}
qlt_response_pkt(host, pkt);
break;
}
default:
qlt_response_pkt(vha, pkt);
break;
}
}
static void qlt_free_session_done(struct work_struct *work)
{
struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
free_work);
struct qla_tgt *tgt = sess->tgt;
struct scsi_qla_host *vha = sess->vha;
struct qla_hw_data *ha = vha->hw;
BUG_ON(!tgt);
/*
* Release the target session for FC Nexus from fabric module code.
*/
if (sess->se_sess != NULL)
ha->tgt.tgt_ops->free_session(sess);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
"Unregistration of sess %p finished\n", sess);
kfree(sess);
/*
* We need to protect against race, when tgt is freed before or
* inside wake_up()
*/
tgt->sess_count--;
if (tgt->sess_count == 0)
wake_up_all(&tgt->waitQ);
}
/* ha->hardware_lock supposed to be held on entry */
void qlt_unreg_sess(struct qla_tgt_sess *sess)
{
struct scsi_qla_host *vha = sess->vha;
vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
list_del(&sess->sess_list_entry);
if (sess->deleted)
list_del(&sess->del_list_entry);
INIT_WORK(&sess->free_work, qlt_free_session_done);
schedule_work(&sess->free_work);
}
EXPORT_SYMBOL(qlt_unreg_sess);
/* ha->hardware_lock supposed to be held on entry */
static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess = NULL;
uint32_t unpacked_lun, lun = 0;
uint16_t loop_id;
int res = 0;
struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
struct atio_from_isp *a = (struct atio_from_isp *)iocb;
loop_id = le16_to_cpu(n->u.isp24.nport_handle);
if (loop_id == 0xFFFF) {
#if 0 /* FIXME: Re-enable Global event handling.. */
/* Global event */
atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
qlt_clear_tgt_db(ha->tgt.qla_tgt);
if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
typeof(*sess), sess_list_entry);
switch (mcmd) {
case QLA_TGT_NEXUS_LOSS_SESS:
mcmd = QLA_TGT_NEXUS_LOSS;
break;
case QLA_TGT_ABORT_ALL_SESS:
mcmd = QLA_TGT_ABORT_ALL;
break;
case QLA_TGT_NEXUS_LOSS:
case QLA_TGT_ABORT_ALL:
break;
default:
ql_dbg(ql_dbg_tgt, vha, 0xe046,
"qla_target(%d): Not allowed "
"command %x in %s", vha->vp_idx,
mcmd, __func__);
sess = NULL;
break;
}
} else
sess = NULL;
#endif
} else {
sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
}
ql_dbg(ql_dbg_tgt, vha, 0xe000,
"Using sess for qla_tgt_reset: %p\n", sess);
if (!sess) {
res = -ESRCH;
return res;
}
ql_dbg(ql_dbg_tgt, vha, 0xe047,
"scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
"loop_id %d)\n", vha->host_no, sess, sess->port_name,
mcmd, loop_id);
lun = a->u.isp24.fcp_cmnd.lun;
unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
iocb, QLA24XX_MGMT_SEND_NACK);
}
/* ha->hardware_lock supposed to be held on entry */
static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
bool immediate)
{
struct qla_tgt *tgt = sess->tgt;
uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
if (sess->deleted)
return;
ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
"Scheduling sess %p for deletion\n", sess);
list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
sess->deleted = 1;
if (immediate)
dev_loss_tmo = 0;
sess->expires = jiffies + dev_loss_tmo * HZ;
ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
"qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
"deletion in %u secs (expires: %lu) immed: %d\n",
sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
sess->expires, immediate);
if (immediate)
schedule_delayed_work(&tgt->sess_del_work, 0);
else
schedule_delayed_work(&tgt->sess_del_work,
sess->expires - jiffies);
}
/* ha->hardware_lock supposed to be held on entry */
static void qlt_clear_tgt_db(struct qla_tgt *tgt)
{
struct qla_tgt_sess *sess;
list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
qlt_schedule_sess_for_deletion(sess, true);
/* At this point tgt could be already dead */
}
static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
uint16_t *loop_id)
{
struct qla_hw_data *ha = vha->hw;
dma_addr_t gid_list_dma;
struct gid_list_info *gid_list;
char *id_iter;
int res, rc, i;
uint16_t entries;
gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
&gid_list_dma, GFP_KERNEL);
if (!gid_list) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
"qla_target(%d): DMA Alloc failed of %u\n",
vha->vp_idx, qla2x00_gid_list_size(ha));
return -ENOMEM;
}
/* Get list of logged in devices */
rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
if (rc != QLA_SUCCESS) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
"qla_target(%d): get_id_list() failed: %x\n",
vha->vp_idx, rc);
res = -1;
goto out_free_id_list;
}
id_iter = (char *)gid_list;
res = -1;
for (i = 0; i < entries; i++) {
struct gid_list_info *gid = (struct gid_list_info *)id_iter;
if ((gid->al_pa == s_id[2]) &&
(gid->area == s_id[1]) &&
(gid->domain == s_id[0])) {
*loop_id = le16_to_cpu(gid->loop_id);
res = 0;
break;
}
id_iter += ha->gid_list_info_size;
}
out_free_id_list:
dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
gid_list, gid_list_dma);
return res;
}
/* ha->hardware_lock supposed to be held on entry */
static void qlt_undelete_sess(struct qla_tgt_sess *sess)
{
BUG_ON(!sess->deleted);
list_del(&sess->del_list_entry);
sess->deleted = 0;
}
static void qlt_del_sess_work_fn(struct delayed_work *work)
{
struct qla_tgt *tgt = container_of(work, struct qla_tgt,
sess_del_work);
struct scsi_qla_host *vha = tgt->vha;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess;
unsigned long flags, elapsed;
spin_lock_irqsave(&ha->hardware_lock, flags);
while (!list_empty(&tgt->del_sess_list)) {
sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
del_list_entry);
elapsed = jiffies;
if (time_after_eq(elapsed, sess->expires)) {
qlt_undelete_sess(sess);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
"Timeout: sess %p about to be deleted\n",
sess);
ha->tgt.tgt_ops->shutdown_sess(sess);
ha->tgt.tgt_ops->put_sess(sess);
} else {
schedule_delayed_work(&tgt->sess_del_work,
sess->expires - elapsed);
break;
}
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
/*
* Adds an extra ref to allow to drop hw lock after adding sess to the list.
* Caller must put it.
*/
static struct qla_tgt_sess *qlt_create_sess(
struct scsi_qla_host *vha,
fc_port_t *fcport,
bool local)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess;
unsigned long flags;
unsigned char be_sid[3];
/* Check to avoid double sessions */
spin_lock_irqsave(&ha->hardware_lock, flags);
list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
sess_list_entry) {
if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
"Double sess %p found (s_id %x:%x:%x, "
"loop_id %d), updating to d_id %x:%x:%x, "
"loop_id %d", sess, sess->s_id.b.domain,
sess->s_id.b.al_pa, sess->s_id.b.area,
sess->loop_id, fcport->d_id.b.domain,
fcport->d_id.b.al_pa, fcport->d_id.b.area,
fcport->loop_id);
if (sess->deleted)
qlt_undelete_sess(sess);
kref_get(&sess->se_sess->sess_kref);
ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
(fcport->flags & FCF_CONF_COMP_SUPPORTED));
if (sess->local && !local)
sess->local = 0;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return sess;
}
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
sess = kzalloc(sizeof(*sess), GFP_KERNEL);
if (!sess) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
"qla_target(%u): session allocation failed, all commands "
"from port %8phC will be refused", vha->vp_idx,
fcport->port_name);
return NULL;
}
sess->tgt = vha->vha_tgt.qla_tgt;
sess->vha = vha;
sess->s_id = fcport->d_id;
sess->loop_id = fcport->loop_id;
sess->local = local;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
"Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
sess, vha->vha_tgt.qla_tgt);
be_sid[0] = sess->s_id.b.domain;
be_sid[1] = sess->s_id.b.area;
be_sid[2] = sess->s_id.b.al_pa;
/*
* Determine if this fc_port->port_name is allowed to access
* target mode using explict NodeACLs+MappedLUNs, or using
* TPG demo mode. If this is successful a target mode FC nexus
* is created.
*/
if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
&fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
kfree(sess);
return NULL;
}
/*
* Take an extra reference to ->sess_kref here to handle qla_tgt_sess
* access across ->hardware_lock reaquire.
*/
kref_get(&sess->se_sess->sess_kref);
sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
spin_lock_irqsave(&ha->hardware_lock, flags);
list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
vha->vha_tgt.qla_tgt->sess_count++;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
"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 ");
return sess;
}
/*
* Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
*/
void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_sess *sess;
unsigned long flags;
if (!vha->hw->tgt.tgt_ops)
return;
if (!tgt || (fcport->port_type != FCT_INITIATOR))
return;
if (qla_ini_mode_enabled(vha))
return;
spin_lock_irqsave(&ha->hardware_lock, flags);
if (tgt->tgt_stop) {
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return;
}
sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
if (!sess) {
spin_unlock_irqrestore(&ha->hardware_lock, flags);
mutex_lock(&vha->vha_tgt.tgt_mutex);
sess = qlt_create_sess(vha, fcport, false);
mutex_unlock(&vha->vha_tgt.tgt_mutex);
spin_lock_irqsave(&ha->hardware_lock, flags);
} else {
kref_get(&sess->se_sess->sess_kref);
if (sess->deleted) {
qlt_undelete_sess(sess);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
"qla_target(%u): %ssession for port %8phC "
"(loop ID %d) reappeared\n", vha->vp_idx,
sess->local ? "local " : "", sess->port_name,
sess->loop_id);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
"Reappeared sess %p\n", sess);
}
ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
(fcport->flags & FCF_CONF_COMP_SUPPORTED));
}
if (sess && sess->local) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
"qla_target(%u): local session for "
"port %8phC (loop ID %d) became global\n", vha->vp_idx,
fcport->port_name, sess->loop_id);
sess->local = 0;
}
ha->tgt.tgt_ops->put_sess(sess);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_sess *sess;
unsigned long flags;
if (!vha->hw->tgt.tgt_ops)
return;
if (!tgt || (fcport->port_type != FCT_INITIATOR))
return;
spin_lock_irqsave(&ha->hardware_lock, flags);
if (tgt->tgt_stop) {
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return;
}
sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
if (!sess) {
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
sess->local = 1;
qlt_schedule_sess_for_deletion(sess, false);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static inline int test_tgt_sess_count(struct qla_tgt *tgt)
{
struct qla_hw_data *ha = tgt->ha;
unsigned long flags;
int res;
/*
* We need to protect against race, when tgt is freed before or
* inside wake_up()
*/
spin_lock_irqsave(&ha->hardware_lock, flags);
ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
"tgt %p, empty(sess_list)=%d sess_count=%d\n",
tgt, list_empty(&tgt->sess_list), tgt->sess_count);
res = (tgt->sess_count == 0);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return res;
}
/* Called by tcm_qla2xxx configfs code */
int qlt_stop_phase1(struct qla_tgt *tgt)
{
struct scsi_qla_host *vha = tgt->vha;
struct qla_hw_data *ha = tgt->ha;
unsigned long flags;
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;
}
}
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");
mutex_unlock(&qla_tgt_mutex);
return -EPERM;
}
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.
*/
mutex_lock(&vha->vha_tgt.tgt_mutex);
spin_lock_irqsave(&ha->hardware_lock, flags);
tgt->tgt_stop = 1;
qlt_clear_tgt_db(tgt);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
mutex_unlock(&vha->vha_tgt.tgt_mutex);
mutex_unlock(&qla_tgt_mutex);
flush_delayed_work(&tgt->sess_del_work);
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));
return 0;
}
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;
scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
unsigned long flags;
if (tgt->tgt_stopped) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
"Already in tgt->tgt_stopped state\n");
dump_stack();
return;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
"Waiting for %d IRQ commands to complete (tgt %p)",
tgt->irq_cmd_count, tgt);
mutex_lock(&vha->vha_tgt.tgt_mutex);
spin_lock_irqsave(&ha->hardware_lock, flags);
while (tgt->irq_cmd_count != 0) {
spin_unlock_irqrestore(&ha->hardware_lock, flags);
udelay(2);
spin_lock_irqsave(&ha->hardware_lock, flags);
}
tgt->tgt_stop = 0;
tgt->tgt_stopped = 1;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
mutex_unlock(&vha->vha_tgt.tgt_mutex);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
tgt);
}
EXPORT_SYMBOL(qlt_stop_phase2);
/* Called from qlt_remove_target() -> qla2x00_remove_one() */
static void qlt_release(struct qla_tgt *tgt)
{
scsi_qla_host_t *vha = tgt->vha;
if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
qlt_stop_phase2(tgt);
vha->vha_tgt.qla_tgt = NULL;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
"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;
}
if (vha->vha_tgt.qla_tgt != NULL)
vha->vha_tgt.qla_tgt->notify_ack_expected++;
pkt->entry_type = NOTIFY_ACK_TYPE;
pkt->entry_count = 1;
nack = (struct nack_to_isp *)pkt;
nack->ox_id = ntfy->ox_id;
nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
nack->u.isp24.flags = ntfy->u.isp24.flags &
__constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
}
nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
nack->u.isp24.status = ntfy->u.isp24.status;
nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
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.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);
/* Memory Barrier */
wmb();
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;
resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
if (!resp) {
ql_dbg(ql_dbg_tgt, vha, 0xe04a,
"qla_target(%d): %s failed: unable to allocate "
"request packet", vha->vp_idx, __func__);
return;
}
resp->entry_type = ABTS_RESP_24XX;
resp->entry_count = 1;
resp->nport_handle = abts->nport_handle;
resp->vp_index = vha->vp_idx;
resp->sof_type = abts->sof_type;
resp->exchange_address = abts->exchange_address;
resp->fcp_hdr_le = abts->fcp_hdr_le;
f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
F_CTL_LAST_SEQ | F_CTL_END_SEQ |
F_CTL_SEQ_INITIATIVE);
p = (uint8_t *)&f_ctl;
resp->fcp_hdr_le.f_ctl[0] = *p++;
resp->fcp_hdr_le.f_ctl[1] = *p++;
resp->fcp_hdr_le.f_ctl[2] = *p;
if (ids_reversed) {
resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
} else {
resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
}
resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
if (status == FCP_TMF_CMPL) {
resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
resp->payload.ba_acct.low_seq_cnt = 0x0000;
resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
} else {
resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
resp->payload.ba_rjt.reason_code =
BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
/* Other bytes are zero */
}
vha->vha_tgt.qla_tgt->abts_resp_expected++;
/* Memory Barrier */
wmb();
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;
ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
if (ctio == NULL) {
ql_dbg(ql_dbg_tgt, vha, 0xe04b,
"qla_target(%d): %s failed: unable to allocate "
"request packet\n", vha->vp_idx, __func__);
return;
}
/*
* We've got on entrance firmware's response on by us generated
* ABTS response. So, in it ID fields are reversed.
*/
ctio->entry_type = CTIO_TYPE7;
ctio->entry_count = 1;
ctio->nport_handle = entry->nport_handle;
ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
ctio->vp_index = vha->vp_idx;
ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
ctio->exchange_addr = entry->exchange_addr_to_abort;
ctio->u.status1.flags =
__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
CTIO7_FLAGS_TERMINATE);
ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
/* Memory Barrier */
wmb();
qla2x00_start_iocbs(vha, vha->req);
qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
FCP_TMF_CMPL, true);
}
/* ha->hardware_lock supposed to be held on entry */
static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
{
struct qla_hw_data *ha = vha->hw;
struct se_session *se_sess = sess->se_sess;
struct qla_tgt_mgmt_cmd *mcmd;
struct se_cmd *se_cmd;
u32 lun = 0;
int rc;
bool found_lun = false;
spin_lock(&se_sess->sess_cmd_lock);
list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
struct qla_tgt_cmd *cmd =
container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
if (cmd->tag == abts->exchange_addr_to_abort) {
lun = cmd->unpacked_lun;
found_lun = true;
break;
}
}
spin_unlock(&se_sess->sess_cmd_lock);
if (!found_lun)
return -ENOENT;
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));
mcmd->reset_count = vha->hw->chip_reset;
rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
abts->exchange_addr_to_abort);
if (rc != 0) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
"qla_target(%d): tgt_ops->handle_tmr()"
" failed: %d", vha->vp_idx, rc);
mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
return -EFAULT;
}
return 0;
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
struct abts_recv_from_24xx *abts)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess;
uint32_t tag = abts->exchange_addr_to_abort;
uint8_t s_id[3];
int rc;
if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
"qla_target(%d): ABTS: Abort Sequence not "
"supported\n", vha->vp_idx);
qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
return;
}
if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
"qla_target(%d): ABTS: Unknown Exchange "
"Address received\n", vha->vp_idx);
qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
return;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
"qla_target(%d): task abort (s_id=%x:%x:%x, "
"tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
le32_to_cpu(abts->fcp_hdr_le.parameter));
s_id[0] = abts->fcp_hdr_le.s_id[2];
s_id[1] = abts->fcp_hdr_le.s_id[1];
s_id[2] = abts->fcp_hdr_le.s_id[0];
sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
if (!sess) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
"qla_target(%d): task abort for non-existant session\n",
vha->vp_idx);
rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
if (rc != 0) {
qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
false);
}
return;
}
rc = __qlt_24xx_handle_abts(vha, abts, sess);
if (rc != 0) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
"qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
vha->vp_idx, rc);
qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
return;
}
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
{
struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
struct ctio7_to_24xx *ctio;
uint16_t temp;
ql_dbg(ql_dbg_tgt, ha, 0xe008,
"Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
ha, atio, resp_code);
/* Send marker if required */
if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
return;
ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
if (ctio == NULL) {
ql_dbg(ql_dbg_tgt, ha, 0xe04c,
"qla_target(%d): %s failed: unable to allocate "
"request packet\n", ha->vp_idx, __func__);
return;
}
ctio->entry_type = CTIO_TYPE7;
ctio->entry_count = 1;
ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
ctio->nport_handle = mcmd->sess->loop_id;
ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
ctio->vp_index = ha->vp_idx;
ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
ctio->exchange_addr = atio->u.isp24.exchange_addr;
ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
CTIO7_FLAGS_SEND_STATUS);
temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
ctio->u.status1.ox_id = cpu_to_le16(temp);
ctio->u.status1.scsi_status =
__constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
ctio->u.status1.response_len = __constant_cpu_to_le16(8);
ctio->u.status1.sense_data[0] = resp_code;
/* Memory Barrier */
wmb();
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);
if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
/*
* Either a chip reset is active or this request was from
* previous life, just abort the processing.
*/
ql_dbg(ql_dbg_async, vha, 0xe100,
"RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
qla2x00_reset_active(vha), mcmd->reset_count,
ha->chip_reset);
ha->tgt.tgt_ops->free_mcmd(mcmd);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return;
}
if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
0, 0, 0, 0, 0, 0);
else {
if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
mcmd->fc_tm_rsp, false);
else
qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
mcmd->fc_tm_rsp);
}
/*
* Make the callback for ->free_mcmd() to queue_work() and invoke
* target_put_sess_cmd() to drop cmd_kref to 1. The final
* target_put_sess_cmd() call will be made from TFO->check_stop_free()
* -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
* descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
* qlt_xmit_tm_rsp() returns here..
*/
ha->tgt.tgt_ops->free_mcmd(mcmd);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
EXPORT_SYMBOL(qlt_xmit_tm_rsp);
/* No locks */
static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
{
struct qla_tgt_cmd *cmd = prm->cmd;
BUG_ON(cmd->sg_cnt == 0);
prm->sg = (struct scatterlist *)cmd->sg;
prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
cmd->sg_cnt, cmd->dma_data_direction);
if (unlikely(prm->seg_cnt == 0))
goto out_err;
prm->cmd->sg_mapped = 1;
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;
}
}
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;
}
static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
{
struct qla_hw_data *ha = vha->hw;
if (!cmd->sg_mapped)
return;
pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
cmd->sg_mapped = 0;
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);
}
static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
uint32_t req_cnt)
{
uint32_t cnt, cnt_in;
if (vha->req->cnt < (req_cnt + 2)) {
cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
if (vha->req->ring_index < cnt)
vha->req->cnt = cnt - vha->req->ring_index;
else
vha->req->cnt = vha->req->length -
(vha->req->ring_index - cnt);
}
if (unlikely(vha->req->cnt < (req_cnt + 2))) {
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;
}
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;
if (h > DEFAULT_OUTSTANDING_COMMANDS)
h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
if (h == ha->tgt.current_handle) {
ql_dbg(ql_dbg_io, vha, 0x305b,
"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;
uint16_t temp;
pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
prm->pkt = pkt;
memset(pkt, 0, sizeof(*pkt));
pkt->entry_type = CTIO_TYPE7;
pkt->entry_count = (uint8_t)prm->req_cnt;
pkt->vp_index = vha->vp_idx;
h = qlt_make_handle(vha);
if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
/*
* CTIO type 7 from the firmware doesn't provide a way to
* know the initiator's LOOP ID, hence we can't find
* the session and, so, the command.
*/
return -EAGAIN;
} else
ha->tgt.cmds[h-1] = prm->cmd;
pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
pkt->nport_handle = prm->cmd->loop_id;
pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
pkt->exchange_addr = atio->u.isp24.exchange_addr;
pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
pkt->u.status0.ox_id = cpu_to_le16(temp);
pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
return 0;
}
/*
* ha->hardware_lock supposed to be held on entry. We have already made sure
* that there is sufficient amount of request entries to not drop it.
*/
static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
struct scsi_qla_host *vha)
{
int cnt;
uint32_t *dword_ptr;
int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
/* Build continuation packets */
while (prm->seg_cnt > 0) {
cont_a64_entry_t *cont_pkt64 =
(cont_a64_entry_t *)qlt_get_req_pkt(vha);
/*
* Make sure that from cont_pkt64 none of
* 64-bit specific fields used for 32-bit
* addressing. Cast to (cont_entry_t *) for
* that.
*/
memset(cont_pkt64, 0, sizeof(*cont_pkt64));
cont_pkt64->entry_count = 1;
cont_pkt64->sys_define = 0;
if (enable_64bit_addressing) {
cont_pkt64->entry_type = CONTINUE_A64_TYPE;
dword_ptr =
(uint32_t *)&cont_pkt64->dseg_0_address;
} else {
cont_pkt64->entry_type = CONTINUE_TYPE;
dword_ptr =
(uint32_t *)&((cont_entry_t *)
cont_pkt64)->dseg_0_address;
}
/* Load continuation entry data segments */
for (cnt = 0;
cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
cnt++, prm->seg_cnt--) {
*dword_ptr++ =
cpu_to_le32(pci_dma_lo32
(sg_dma_address(prm->sg)));
if (enable_64bit_addressing) {
*dword_ptr++ =
cpu_to_le32(pci_dma_hi32
(sg_dma_address
(prm->sg)));
}
*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
prm->sg = sg_next(prm->sg);
}
}
}
/*
* ha->hardware_lock supposed to be held on entry. We have already made sure
* that there is sufficient amount of request entries to not drop it.
*/
static void qlt_load_data_segments(struct qla_tgt_prm *prm,
struct scsi_qla_host *vha)
{
int cnt;
uint32_t *dword_ptr;
int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
/* Setup packet address segment pointer */
dword_ptr = pkt24->u.status0.dseg_0_address;
/* Set total data segment count */
if (prm->seg_cnt)
pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
if (prm->seg_cnt == 0) {
/* No data transfer */
*dword_ptr++ = 0;
*dword_ptr = 0;
return;
}
/* If scatter gather */
/* Load command entry data segments */
for (cnt = 0;
(cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
cnt++, prm->seg_cnt--) {
*dword_ptr++ =
cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
if (enable_64bit_addressing) {
*dword_ptr++ =
cpu_to_le32(pci_dma_hi32(
sg_dma_address(prm->sg)));
}
*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
prm->sg = sg_next(prm->sg);
}
qlt_load_cont_data_segments(prm, vha);
}
static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
{
return cmd->bufflen > 0;
}
/*
* Called without ha->hardware_lock held
*/
static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
uint32_t *full_req_cnt)
{
struct qla_tgt *tgt = cmd->tgt;
struct scsi_qla_host *vha = tgt->vha;
struct qla_hw_data *ha = vha->hw;
struct se_cmd *se_cmd = &cmd->se_cmd;
if (unlikely(cmd->aborted)) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
"qla_target(%d): terminating exchange "
"for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
se_cmd, cmd->tag);
cmd->state = QLA_TGT_STATE_ABORTED;
cmd->cmd_flags |= BIT_6;
qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
/* !! At this point cmd could be already freed !! */
return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
}
prm->cmd = cmd;
prm->tgt = tgt;
prm->rq_result = scsi_status;
prm->sense_buffer = &cmd->sense_buffer[0];
prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
prm->sg = NULL;
prm->seg_cnt = -1;
prm->req_cnt = 1;
prm->add_status_pkt = 0;
/* Send marker if required */
if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
return -EFAULT;
if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
if (qlt_pci_map_calc_cnt(prm) != 0)
return -EAGAIN;
}
*full_req_cnt = prm->req_cnt;
if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
prm->residual = se_cmd->residual_count;
ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
"Residual underflow: %d (tag %d, "
"op %x, bufflen %d, rq_result %x)\n", prm->residual,
cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
cmd->bufflen, prm->rq_result);
prm->rq_result |= SS_RESIDUAL_UNDER;
} else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
prm->residual = se_cmd->residual_count;
ql_dbg(ql_dbg_io, vha, 0x305d,
"Residual overflow: %d (tag %d, "
"op %x, bufflen %d, rq_result %x)\n", prm->residual,
cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
cmd->bufflen, prm->rq_result);
prm->rq_result |= SS_RESIDUAL_OVER;
}
if (xmit_type & QLA_TGT_XMIT_STATUS) {
/*
* If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
* ignored in *xmit_response() below
*/
if (qlt_has_data(cmd)) {
if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
(IS_FWI2_CAPABLE(ha) &&
(prm->rq_result != 0))) {
prm->add_status_pkt = 1;
(*full_req_cnt)++;
}
}
}
return 0;
}
static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
struct qla_tgt_cmd *cmd, int sending_sense)
{
if (ha->tgt.enable_class_2)
return 0;
if (sending_sense)
return cmd->conf_compl_supported;
else
return ha->tgt.enable_explicit_conf &&
cmd->conf_compl_supported;
}
#ifdef CONFIG_QLA_TGT_DEBUG_SRR
/*
* Original taken from the XFS code
*/
static unsigned long qlt_srr_random(void)
{
static int Inited;
static unsigned long RandomValue;
static DEFINE_SPINLOCK(lock);
/* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
register long rv;
register long lo;
register long hi;
unsigned long flags;
spin_lock_irqsave(&lock, flags);
if (!Inited) {
RandomValue = jiffies;
Inited = 1;
}
rv = RandomValue;
hi = rv / 127773;
lo = rv % 127773;
rv = 16807 * lo - 2836 * hi;
if (rv <= 0)
rv += 2147483647;
RandomValue = rv;
spin_unlock_irqrestore(&lock, flags);
return rv;
}
static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
{
#if 0 /* This is not a real status packets lost, so it won't lead to SRR */
if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
== 50) {
*xmit_type &= ~QLA_TGT_XMIT_STATUS;
ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
"Dropping cmd %p (tag %d) status", cmd, cmd->tag);
}
#endif
/*
* It's currently not possible to simulate SRRs for FCP_WRITE without
* a physical link layer failure, so don't even try here..
*/
if (cmd->dma_data_direction != DMA_FROM_DEVICE)
return;
if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
((qlt_srr_random() % 100) == 20)) {
int i, leave = 0;
unsigned int tot_len = 0;
while (leave == 0)
leave = qlt_srr_random() % cmd->sg_cnt;
for (i = 0; i < leave; i++)
tot_len += cmd->sg[i].length;
ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
"Cutting cmd %p (tag %d) buffer"
" tail to len %d, sg_cnt %d (cmd->bufflen %d,"
" cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
cmd->bufflen, cmd->sg_cnt);
cmd->bufflen = tot_len;
cmd->sg_cnt = leave;
}
if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
unsigned int offset = qlt_srr_random() % cmd->bufflen;
ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
"Cutting cmd %p (tag %d) buffer head "
"to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
cmd->bufflen);
if (offset == 0)
*xmit_type &= ~QLA_TGT_XMIT_DATA;
else if (qlt_set_data_offset(cmd, offset)) {
ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
"qlt_set_data_offset() failed (tag %d)", cmd->tag);
}
}
}
#else
static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
{}
#endif
static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
struct qla_tgt_prm *prm)
{
prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
(uint32_t)sizeof(ctio->u.status1.sense_data));
ctio->u.status0.flags |=
__constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
ctio->u.status0.flags |= __constant_cpu_to_le16(
CTIO7_FLAGS_EXPLICIT_CONFORM |
CTIO7_FLAGS_CONFORM_REQ);
}
ctio->u.status0.residual = cpu_to_le32(prm->residual);
ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
int i;
if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
if (prm->cmd->se_cmd.scsi_status != 0) {
ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
"Skipping EXPLICIT_CONFORM and "
"CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
"non GOOD status\n");
goto skip_explict_conf;
}
ctio->u.status1.flags |= __constant_cpu_to_le16(
CTIO7_FLAGS_EXPLICIT_CONFORM |
CTIO7_FLAGS_CONFORM_REQ);
}
skip_explict_conf:
ctio->u.status1.flags &=
~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
ctio->u.status1.flags |=
__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
ctio->u.status1.scsi_status |=
__constant_cpu_to_le16(SS_SENSE_LEN_VALID);
ctio->u.status1.sense_length =
cpu_to_le16(prm->sense_buffer_len);
for (i = 0; i < prm->sense_buffer_len/4; i++)
((uint32_t *)ctio->u.status1.sense_data)[i] =
cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
#if 0
if (unlikely((prm->sense_buffer_len % 4) != 0)) {
static int q;
if (q < 10) {
ql_dbg(ql_dbg_tgt, vha, 0xe04f,
"qla_target(%d): %d bytes of sense "
"lost", prm->tgt->ha->vp_idx,
prm->sense_buffer_len % 4);
q++;
}
}
#endif
} else {
ctio->u.status1.flags &=
~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
ctio->u.status1.flags |=
__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
ctio->u.status1.sense_length = 0;
memset(ctio->u.status1.sense_data, 0,
sizeof(ctio->u.status1.sense_data));
}
/* Sense with len > 24, is it possible ??? */
}
/* 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[]
*/
ctx->app_tag = 0;
ctx->app_tag_mask[0] = 0x0;
ctx->app_tag_mask[1] = 0x0;
switch (se_cmd->prot_type) {
case TARGET_DIF_TYPE0_PROT:
/*
* No check for ql2xenablehba_err_chk, as it would be an
* I/O error if hba tag generation is not done.
*/
ctx->ref_tag = cpu_to_le32(lba);
if (!qlt_hba_err_chk_enabled(se_cmd))
break;
/* enable ALL bytes of the ref tag */
ctx->ref_tag_mask[0] = 0xff;
ctx->ref_tag_mask[1] = 0xff;
ctx->ref_tag_mask[2] = 0xff;
ctx->ref_tag_mask[3] = 0xff;
break;
/*
* For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
* 16 bit app tag.
*/
case TARGET_DIF_TYPE1_PROT:
ctx->ref_tag = cpu_to_le32(lba);
if (!qlt_hba_err_chk_enabled(se_cmd))
break;
/* enable ALL bytes of the ref tag */
ctx->ref_tag_mask[0] = 0xff;
ctx->ref_tag_mask[1] = 0xff;
ctx->ref_tag_mask[2] = 0xff;
ctx->ref_tag_mask[3] = 0xff;
break;
/*
* For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
* match LBA in CDB + N
*/
case TARGET_DIF_TYPE2_PROT:
ctx->ref_tag = cpu_to_le32(lba);
if (!qlt_hba_err_chk_enabled(se_cmd))
break;
/* enable ALL bytes of the ref tag */
ctx->ref_tag_mask[0] = 0xff;
ctx->ref_tag_mask[1] = 0xff;
ctx->ref_tag_mask[2] = 0xff;
ctx->ref_tag_mask[3] = 0xff;
break;
/* For Type 3 protection: 16 bit GUARD only */
case TARGET_DIF_TYPE3_PROT:
ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
break;
}
}
static inline int
qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
{
uint32_t *cur_dsd;
int sgc;
uint32_t transfer_length = 0;
uint32_t data_bytes;
uint32_t dif_bytes;
uint8_t bundling = 1;
uint8_t *clr_ptr;
struct crc_context *crc_ctx_pkt = NULL;
struct qla_hw_data *ha;
struct ctio_crc2_to_fw *pkt;
dma_addr_t crc_ctx_dma;
uint16_t fw_prot_opts = 0;
struct qla_tgt_cmd *cmd = prm->cmd;
struct se_cmd *se_cmd = &cmd->se_cmd;
uint32_t h;
struct atio_from_isp *atio = &prm->cmd->atio;
uint16_t t16;
sgc = 0;
ha = vha->hw;
pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
prm->pkt = pkt;
memset(pkt, 0, sizeof(*pkt));
ql_dbg(ql_dbg_tgt, vha, 0xe071,
"qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
(se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
bundling = 0;
/* Compute dif len and adjust data len to incude protection */
data_bytes = cmd->bufflen;
dif_bytes = (data_bytes / cmd->blk_sz) * 8;
switch (se_cmd->prot_op) {
case TARGET_PROT_DIN_INSERT:
case TARGET_PROT_DOUT_STRIP:
transfer_length = data_bytes;
data_bytes += dif_bytes;
break;
case TARGET_PROT_DIN_STRIP:
case TARGET_PROT_DOUT_INSERT:
case TARGET_PROT_DIN_PASS:
case TARGET_PROT_DOUT_PASS:
transfer_length = data_bytes + dif_bytes;
break;
default:
BUG();
break;
}
if (!qlt_hba_err_chk_enabled(se_cmd))
fw_prot_opts |= 0x10; /* Disable Guard tag checking */
/* HBA error checking enabled */
else if (IS_PI_UNINIT_CAPABLE(ha)) {
if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
(se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
fw_prot_opts |= PO_DIS_VALD_APP_ESC;
else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
}
switch (se_cmd->prot_op) {
case TARGET_PROT_DIN_INSERT:
case TARGET_PROT_DOUT_INSERT:
fw_prot_opts |= PO_MODE_DIF_INSERT;
break;
case TARGET_PROT_DIN_STRIP:
case TARGET_PROT_DOUT_STRIP:
fw_prot_opts |= PO_MODE_DIF_REMOVE;
break;
case TARGET_PROT_DIN_PASS:
case TARGET_PROT_DOUT_PASS:
fw_prot_opts |= PO_MODE_DIF_PASS;
/* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
break;
default:/* Normal Request */
fw_prot_opts |= PO_MODE_DIF_PASS;
break;
}
/* ---- PKT ---- */
/* Update entry type to indicate Command Type CRC_2 IOCB */
pkt->entry_type = CTIO_CRC2;
pkt->entry_count = 1;
pkt->vp_index = vha->vp_idx;
h = qlt_make_handle(vha);
if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
/*
* CTIO type 7 from the firmware doesn't provide a way to
* know the initiator's LOOP ID, hence we can't find
* the session and, so, the command.
*/
return -EAGAIN;
} else
ha->tgt.cmds[h-1] = prm->cmd;
pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
pkt->nport_handle = prm->cmd->loop_id;
pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
pkt->exchange_addr = atio->u.isp24.exchange_addr;
/* 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);
pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
/* Set transfer direction */
if (cmd->dma_data_direction == DMA_TO_DEVICE)
pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
pkt->dseg_count = prm->tot_dsds;
/* Fibre channel byte count */
pkt->transfer_length = cpu_to_le32(transfer_length);
/* ----- CRC context -------- */
/* Allocate CRC context from global pool */
crc_ctx_pkt = cmd->ctx =
dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
if (!crc_ctx_pkt)
goto crc_queuing_error;
/* Zero out CTX area. */
clr_ptr = (uint8_t *)crc_ctx_pkt;
memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
/* Set handle */
crc_ctx_pkt->handle = pkt->handle;
qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
if (!bundling) {
cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
} else {
/*
* Configure Bundling if we need to fetch interlaving
* protection PCI accesses
*/
fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
crc_ctx_pkt->u.bundling.dseg_count =
cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
}
/* Finish the common fields of CRC pkt */
crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz);
crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
/* Walks data segments */
pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
if (!bundling && prm->prot_seg_cnt) {
if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
prm->tot_dsds, cmd))
goto crc_queuing_error;
} else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
(prm->tot_dsds - prm->prot_seg_cnt), cmd))
goto crc_queuing_error;
if (bundling && prm->prot_seg_cnt) {
/* Walks dif segments */
pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
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;
}
/*
* Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
* QLA_TGT_XMIT_STATUS for >= 24xx silicon
*/
int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
uint8_t scsi_status)
{
struct scsi_qla_host *vha = cmd->vha;
struct qla_hw_data *ha = vha->hw;
struct ctio7_to_24xx *pkt;
struct qla_tgt_prm prm;
uint32_t full_req_cnt = 0;
unsigned long flags = 0;
int res;
memset(&prm, 0, sizeof(prm));
qlt_check_srr_debug(cmd, &xmit_type);
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
"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);
res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
&full_req_cnt);
if (unlikely(res != 0)) {
if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
return 0;
return res;
}
spin_lock_irqsave(&ha->hardware_lock, flags);
if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
/*
* Either a chip reset is active or this request was from
* previous life, just abort the processing.
*/
cmd->state = QLA_TGT_STATE_PROCESSED;
qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
ql_dbg(ql_dbg_async, vha, 0xe101,
"RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
qla2x00_reset_active(vha), cmd->reset_count,
ha->chip_reset);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return 0;
}
/* 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;
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);
if (unlikely(res != 0))
goto out_unmap_unlock;
pkt = (struct ctio7_to_24xx *)prm.pkt;
if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
pkt->u.status0.flags |=
__constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
CTIO7_FLAGS_STATUS_MODE_0);
if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
qlt_load_data_segments(&prm, vha);
if (prm.add_status_pkt == 0) {
if (xmit_type & QLA_TGT_XMIT_STATUS) {
pkt->u.status0.scsi_status =
cpu_to_le16(prm.rq_result);
pkt->u.status0.residual =
cpu_to_le32(prm.residual);
pkt->u.status0.flags |= __constant_cpu_to_le16(
CTIO7_FLAGS_SEND_STATUS);
if (qlt_need_explicit_conf(ha, cmd, 0)) {
pkt->u.status0.flags |=
__constant_cpu_to_le16(
CTIO7_FLAGS_EXPLICIT_CONFORM |
CTIO7_FLAGS_CONFORM_REQ);
}
}
} else {
/*
* We have already made sure that there is sufficient
* amount of request entries to not drop HW lock in
* req_pkt().
*/
struct ctio7_to_24xx *ctio =
(struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
ql_dbg(ql_dbg_io, vha, 0x305e,
"Building additional status packet 0x%p.\n",
ctio);
/*
* T10Dif: ctio_crc2_to_fw overlay ontop of
* ctio7_to_24xx
*/
memcpy(ctio, pkt, sizeof(*ctio));
/* reset back to CTIO7 */
ctio->entry_count = 1;
ctio->entry_type = CTIO_TYPE7;
ctio->dseg_count = 0;
ctio->u.status1.flags &= ~__constant_cpu_to_le16(
CTIO7_FLAGS_DATA_IN);
/* Real finish is ctio_m1's finish */
pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
pkt->u.status0.flags |= __constant_cpu_to_le16(
CTIO7_FLAGS_DONT_RET_CTIO);
/* 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.
*/
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 */
cmd->cmd_sent_to_fw = 1;
/* Memory Barrier */
wmb();
qla2x00_start_iocbs(vha, vha->req);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return 0;
out_unmap_unlock:
qlt_unmap_sg(vha, cmd);
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);
if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
/*
* Either a chip reset is active or this request was from
* previous life, just abort the processing.
*/
cmd->state = QLA_TGT_STATE_NEED_DATA;
qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
ql_dbg(ql_dbg_async, vha, 0xe102,
"RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
qla2x00_reset_active(vha), cmd->reset_count,
ha->chip_reset);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return 0;
}
/* 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;
if (cmd->se_cmd.prot_op)
res = qlt_build_ctio_crc2_pkt(&prm, vha);
else
res = qlt_24xx_build_ctio_pkt(&prm, vha);
if (unlikely(res != 0))
goto out_unlock_free_unmap;
pkt = (struct ctio7_to_24xx *)prm.pkt;
pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
CTIO7_FLAGS_STATUS_MODE_0);
if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
qlt_load_data_segments(&prm, vha);
cmd->state = QLA_TGT_STATE_NEED_DATA;
cmd->cmd_sent_to_fw = 1;
/* Memory Barrier */
wmb();
qla2x00_start_iocbs(vha, vha->req);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return res;
out_unlock_free_unmap:
qlt_unmap_sg(vha, cmd);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return res;
}
EXPORT_SYMBOL(qlt_rdy_to_xfer);
/*
* 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,
"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",
cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
/*
* Ignore sector if:
* For type 3: ref & app tag is all 'f's
* For type 0,1,2: app tag is all 'f's
*/
if ((a_app_tag == 0xffff) &&
((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
(a_ref_tag == 0xffffffff))) {
uint32_t blocks_done;
/* 2TB boundary case covered automatically with this */
blocks_done = e_ref_tag - (uint32_t)lba + 1;
cmd->se_cmd.bad_sector = e_ref_tag;
cmd->se_cmd.pi_err = 0;
ql_dbg(ql_dbg_tgt, vha, 0xf074,
"need to return scsi good\n");
/* Update protection tag */
if (cmd->prot_sg_cnt) {
uint32_t i, j = 0, k = 0, num_ent;
struct scatterlist *sg, *sgl;
sgl = cmd->prot_sg;
/* Patch the corresponding protection tags */
for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
num_ent = sg_dma_len(sg) / 8;
if (k + num_ent < blocks_done) {
k += num_ent;
continue;
}
j = blocks_done - k - 1;
k = blocks_done;
break;
}
if (k != blocks_done) {
ql_log(ql_log_warn, vha, 0xf076,
"unexpected tag values tag:lba=%u:%llu)\n",
e_ref_tag, (unsigned long long)lba);
goto out;
}
#if 0
struct sd_dif_tuple *spt;
/* TODO:
* This section came from initiator. Is it valid here?
* should ulp be override with actual val???
*/
spt = page_address(sg_page(sg)) + sg->offset;
spt += j;
spt->app_tag = 0xffff;
if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
spt->ref_tag = 0xffffffff;
#endif
}
return 0;
}
/* check guard */
if (e_guard != a_guard) {
cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
ql_log(ql_log_warn, vha, 0xe076,
"Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
a_guard, e_guard, cmd);
goto out;
}
/* check ref tag */
if (e_ref_tag != a_ref_tag) {
cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
cmd->se_cmd.bad_sector = e_ref_tag;
ql_log(ql_log_warn, vha, 0xe077,
"Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
a_guard, e_guard, cmd);
goto out;
}
/* check appl tag */
if (e_app_tag != a_app_tag) {
cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
ql_log(ql_log_warn, vha, 0xe078,
"App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
a_guard, e_guard, cmd);
goto out;
}
out:
return 1;
}
/* 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;
uint16_t temp;
ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
if (pkt == NULL) {
ql_dbg(ql_dbg_tgt, vha, 0xe050,
"qla_target(%d): %s failed: unable to allocate "
"request packet\n", vha->vp_idx, __func__);
return -ENOMEM;
}
if (cmd != NULL) {
if (cmd->state < QLA_TGT_STATE_PROCESSED) {
ql_dbg(ql_dbg_tgt, vha, 0xe051,
"qla_target(%d): Terminating cmd %p with "
"incorrect state %d\n", vha->vp_idx, cmd,
cmd->state);
} else
ret = 1;
}
pkt->entry_count = 1;
pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
ctio24 = (struct ctio7_to_24xx *)pkt;
ctio24->entry_type = CTIO_TYPE7;
ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
ctio24->vp_index = vha->vp_idx;
ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
ctio24->exchange_addr = atio->u.isp24.exchange_addr;
ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
CTIO7_FLAGS_TERMINATE);
temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
ctio24->u.status1.ox_id = cpu_to_le16(temp);
/* 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;
/* Memory Barrier */
wmb();
qla2x00_start_iocbs(vha, vha->req);
return ret;
}
static void qlt_send_term_exchange(struct scsi_qla_host *vha,
struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
{
unsigned long flags;
int rc;
if (qlt_issue_marker(vha, ha_locked) < 0)
return;
if (ha_locked) {
rc = __qlt_send_term_exchange(vha, cmd, atio);
if (rc == -ENOMEM)
qlt_alloc_qfull_cmd(vha, atio, 0, 0);
goto done;
}
spin_lock_irqsave(&vha->hw->hardware_lock, flags);
rc = __qlt_send_term_exchange(vha, cmd, atio);
if (rc == -ENOMEM)
qlt_alloc_qfull_cmd(vha, atio, 0, 0);
spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
done:
if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
!cmd->cmd_sent_to_fw)) {
if (!ha_locked && !in_interrupt())
msleep(250); /* just in case */
qlt_unmap_sg(vha, cmd);
vha->hw->tgt.tgt_ops->free_cmd(cmd);
}
return;
}
static void qlt_init_term_exchange(struct scsi_qla_host *vha)
{
struct list_head free_list;
struct qla_tgt_cmd *cmd, *tcmd;
vha->hw->tgt.leak_exchg_thresh_hold =
(vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
cmd = tcmd = NULL;
if (!list_empty(&vha->hw->tgt.q_full_list)) {
INIT_LIST_HEAD(&free_list);
list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
list_del(&cmd->cmd_list);
/* This cmd was never sent to TCM. There is no need
* to schedule free or call free_cmd
*/
qlt_free_cmd(cmd);
vha->hw->tgt.num_qfull_cmds_alloc--;
}
}
vha->hw->tgt.num_qfull_cmds_dropped = 0;
}
static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
{
uint32_t total_leaked;
total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
if (vha->hw->tgt.leak_exchg_thresh_hold &&
(total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
ql_dbg(ql_dbg_tgt, vha, 0xe079,
"Chip reset due to exchange starvation: %d/%d.\n",
total_leaked, vha->hw->fw_xcb_count);
if (IS_P3P_TYPE(vha->hw))
set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
else
set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
qla2xxx_wake_dpc(vha);
}
}
void qlt_free_cmd(struct qla_tgt_cmd *cmd)
{
struct qla_tgt_sess *sess = cmd->sess;
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));
BUG_ON(cmd->cmd_in_wq);
if (!cmd->q_full)
qlt_decr_num_pend_cmds(cmd->vha);
BUG_ON(cmd->sg_mapped);
cmd->jiffies_at_free = get_jiffies_64();
if (unlikely(cmd->free_sg))
kfree(cmd->sg);
if (!sess || !sess->se_sess) {
WARN_ON(1);
return;
}
cmd->jiffies_at_free = get_jiffies_64();
percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
}
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;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_srr_imm *imm;
tgt->ctio_srr_id++;
cmd->cmd_flags |= BIT_15;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
"qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
if (!ctio) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
"qla_target(%d): SRR CTIO, but ctio is NULL\n",
vha->vp_idx);
return -EINVAL;
}
sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
if (sc != NULL) {
sc->cmd = cmd;
/* IRQ is already OFF */
spin_lock(&tgt->srr_lock);
sc->srr_id = tgt->ctio_srr_id;
list_add_tail(&sc->srr_list_entry,
&tgt->srr_ctio_list);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
"CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
if (tgt->imm_srr_id == tgt->ctio_srr_id) {
int found = 0;
list_for_each_entry(imm, &tgt->srr_imm_list,
srr_list_entry) {
if (imm->srr_id == sc->srr_id) {
found = 1;
break;
}
}
if (found) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
"Scheduling srr work\n");
schedule_work(&tgt->srr_work);
} else {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
"qla_target(%d): imm_srr_id "
"== ctio_srr_id (%d), but there is no "
"corresponding SRR IMM, deleting CTIO "
"SRR %p\n", vha->vp_idx,
tgt->ctio_srr_id, sc);
list_del(&sc->srr_list_entry);
spin_unlock(&tgt->srr_lock);
kfree(sc);
return -EINVAL;
}
}
spin_unlock(&tgt->srr_lock);
} else {
struct qla_tgt_srr_imm *ti;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
"qla_target(%d): Unable to allocate SRR CTIO entry\n",
vha->vp_idx);
spin_lock(&tgt->srr_lock);
list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
srr_list_entry) {
if (imm->srr_id == tgt->ctio_srr_id) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
"IMM SRR %p deleted (id %d)\n",
imm, imm->srr_id);
list_del(&imm->srr_list_entry);
qlt_reject_free_srr_imm(vha, imm, 1);
}
}
spin_unlock(&tgt->srr_lock);
return -ENOMEM;
}
return 0;
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
struct qla_tgt_cmd *cmd, uint32_t status)
{
int term = 0;
if (ctio != NULL) {
struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
term = !(c->flags &
__constant_cpu_to_le16(OF_TERM_EXCH));
} else
term = 1;
if (term)
qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
return term;
}
/* ha->hardware_lock supposed to be held on entry */
static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
uint32_t handle)
{
struct qla_hw_data *ha = vha->hw;
handle--;
if (ha->tgt.cmds[handle] != NULL) {
struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
ha->tgt.cmds[handle] = NULL;
return cmd;
} else
return NULL;
}
/* ha->hardware_lock supposed to be held on entry */
static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
uint32_t handle, void *ctio)
{
struct qla_tgt_cmd *cmd = NULL;
/* Clear out internal marks */
handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
CTIO_INTERMEDIATE_HANDLE_MARK);
if (handle != QLA_TGT_NULL_HANDLE) {
if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
return NULL;
/* handle-1 is actually used */
if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
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;
}
/* hardware_lock should be held by caller. */
static void
qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
{
struct qla_hw_data *ha = vha->hw;
uint32_t handle;
if (cmd->sg_mapped)
qlt_unmap_sg(vha, cmd);
handle = qlt_make_handle(vha);
/* TODO: fix debug message type and ids. */
if (cmd->state == QLA_TGT_STATE_PROCESSED) {
ql_dbg(ql_dbg_io, vha, 0xff00,
"HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
cmd->write_data_transferred = 0;
cmd->state = QLA_TGT_STATE_DATA_IN;
ql_dbg(ql_dbg_io, vha, 0xff01,
"HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
ha->tgt.tgt_ops->handle_data(cmd);
return;
} else if (cmd->state == QLA_TGT_STATE_ABORTED) {
ql_dbg(ql_dbg_io, vha, 0xff02,
"HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
} else {
ql_dbg(ql_dbg_io, vha, 0xff03,
"HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
cmd->state);
dump_stack();
}
cmd->cmd_flags |= BIT_12;
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);
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
uint32_t status, void *ctio)
{
struct qla_hw_data *ha = vha->hw;
struct se_cmd *se_cmd;
struct target_core_fabric_ops *tfo;
struct qla_tgt_cmd *cmd;
if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
/* That could happen only in case of an error/reset/abort */
if (status != CTIO_SUCCESS) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
"Intermediate CTIO received"
" (status %x)\n", status);
}
return;
}
cmd = qlt_ctio_to_cmd(vha, handle, ctio);
if (cmd == NULL)
return;
se_cmd = &cmd->se_cmd;
tfo = se_cmd->se_tfo;
cmd->cmd_sent_to_fw = 0;
qlt_unmap_sg(vha, cmd);
if (unlikely(status != CTIO_SUCCESS)) {
switch (status & 0xFFFF) {
case CTIO_LIP_RESET:
case CTIO_TARGET_RESET:
case CTIO_ABORTED:
/* driver request abort via Terminate exchange */
case CTIO_TIMEOUT:
case CTIO_INVALID_RX_ID:
/* They are OK */
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
"qla_target(%d): CTIO with "
"status %#x received, state %x, se_cmd %p, "
"(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
"TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
status, cmd->state, se_cmd);
break;
case CTIO_PORT_LOGGED_OUT:
case CTIO_PORT_UNAVAILABLE:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
"qla_target(%d): CTIO with PORT LOGGED "
"OUT (29) or PORT UNAVAILABLE (28) status %x "
"received (state %x, se_cmd %p)\n", vha->vp_idx,
status, cmd->state, se_cmd);
break;
case CTIO_SRR_RECEIVED:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
"qla_target(%d): CTIO with SRR_RECEIVED"
" status %x received (state %x, se_cmd %p)\n",
vha->vp_idx, status, cmd->state, se_cmd);
if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
break;
else
return;
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;
}
default:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
"qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
vha->vp_idx, status, cmd->state, se_cmd);
break;
}
/* "cmd->state == QLA_TGT_STATE_ABORTED" means
* cmd is already aborted/terminated, we don't
* need to terminate again. The exchange is already
* cleaned up/freed at FW level. Just cleanup at driver
* level.
*/
if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
(cmd->state != QLA_TGT_STATE_ABORTED)) {
cmd->cmd_flags |= BIT_13;
if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
return;
}
}
skip_term:
if (cmd->state == QLA_TGT_STATE_PROCESSED) {
;
} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
int rx_status = 0;
cmd->state = QLA_TGT_STATE_DATA_IN;
if (unlikely(status != CTIO_SUCCESS))
rx_status = -EIO;
else
cmd->write_data_transferred = 1;
ha->tgt.tgt_ops->handle_data(cmd);
return;
} else if (cmd->state == QLA_TGT_STATE_ABORTED) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
"Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
} else {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
"qla_target(%d): A command in state (%d) should "
"not return a CTIO complete\n", vha->vp_idx, cmd->state);
}
if (unlikely(status != CTIO_SUCCESS) &&
(cmd->state != QLA_TGT_STATE_ABORTED)) {
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:
fcp_task_attr = TCM_SIMPLE_TAG;
break;
case ATIO_HEAD_OF_QUEUE:
fcp_task_attr = TCM_HEAD_TAG;
break;
case ATIO_ORDERED_QUEUE:
fcp_task_attr = TCM_ORDERED_TAG;
break;
case ATIO_ACA_QUEUE:
fcp_task_attr = TCM_ACA_TAG;
break;
case ATIO_UNTAGGED:
fcp_task_attr = TCM_SIMPLE_TAG;
break;
default:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
"qla_target: unknown task code %x, use ORDERED instead\n",
task_codes);
fcp_task_attr = TCM_ORDERED_TAG;
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
*/
static void __qlt_do_work(struct qla_tgt_cmd *cmd)
{
scsi_qla_host_t *vha = cmd->vha;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_sess *sess = cmd->sess;
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;
cmd->cmd_in_wq = 0;
cmd->cmd_flags |= BIT_1;
if (tgt->tgt_stop)
goto out_term;
cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
cmd->tag = atio->u.isp24.exchange_addr;
cmd->unpacked_lun = scsilun_to_int(
(struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
if (atio->u.isp24.fcp_cmnd.rddata &&
atio->u.isp24.fcp_cmnd.wrdata) {
bidi = 1;
data_dir = DMA_TO_DEVICE;
} else if (atio->u.isp24.fcp_cmnd.rddata)
data_dir = DMA_FROM_DEVICE;
else if (atio->u.isp24.fcp_cmnd.wrdata)
data_dir = DMA_TO_DEVICE;
else
data_dir = DMA_NONE;
fcp_task_attr = qlt_get_fcp_task_attr(vha,
atio->u.isp24.fcp_cmnd.task_attr);
data_length = be32_to_cpu(get_unaligned((uint32_t *)
&atio->u.isp24.fcp_cmnd.add_cdb[
atio->u.isp24.fcp_cmnd.add_cdb_len]));
ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
fcp_task_attr, data_dir, bidi);
if (ret != 0)
goto out_term;
/*
* Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
*/
spin_lock_irqsave(&ha->hardware_lock, flags);
ha->tgt.tgt_ops->put_sess(sess);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return;
out_term:
ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
/*
* cmd has not sent to target yet, so pass NULL as the second
* argument to qlt_send_term_exchange() and free the memory here.
*/
cmd->cmd_flags |= BIT_2;
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
qlt_decr_num_pend_cmds(vha);
percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
ha->tgt.tgt_ops->put_sess(sess);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static void qlt_do_work(struct work_struct *work)
{
struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
__qlt_do_work(cmd);
}
static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
struct qla_tgt_sess *sess,
struct atio_from_isp *atio)
{
struct se_session *se_sess = sess->se_sess;
struct qla_tgt_cmd *cmd;
int tag;
tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
if (tag < 0)
return NULL;
cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
memset(cmd, 0, sizeof(struct qla_tgt_cmd));
memcpy(&cmd->atio, atio, sizeof(*atio));
cmd->state = QLA_TGT_STATE_NEW;
cmd->tgt = vha->vha_tgt.qla_tgt;
qlt_incr_num_pend_cmds(vha);
cmd->vha = vha;
cmd->se_cmd.map_tag = tag;
cmd->sess = sess;
cmd->loop_id = sess->loop_id;
cmd->conf_compl_supported = sess->conf_compl_supported;
return cmd;
}
static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
uint16_t);
static void qlt_create_sess_from_atio(struct work_struct *work)
{
struct qla_tgt_sess_op *op = container_of(work,
struct qla_tgt_sess_op, work);
scsi_qla_host_t *vha = op->vha;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess;
struct qla_tgt_cmd *cmd;
unsigned long flags;
uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
"qla_target(%d): Unable to find wwn login"
" (s_id %x:%x:%x), trying to create it manually\n",
vha->vp_idx, s_id[0], s_id[1], s_id[2]);
if (op->atio.u.raw.entry_count > 1) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
"Dropping multy entry atio %p\n", &op->atio);
goto out_term;
}
mutex_lock(&vha->vha_tgt.tgt_mutex);
sess = qlt_make_local_sess(vha, s_id);
/* sess has an extra creation ref. */
mutex_unlock(&vha->vha_tgt.tgt_mutex);
if (!sess)
goto out_term;
/*
* Now obtain a pre-allocated session tag using the original op->atio
* packet header, and dispatch into __qlt_do_work() using the existing
* process context.
*/
cmd = qlt_get_tag(vha, sess, &op->atio);
if (!cmd) {
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
ha->tgt.tgt_ops->put_sess(sess);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
kfree(op);
return;
}
/*
* __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
* the extra reference taken above by qlt_make_local_sess()
*/
__qlt_do_work(cmd);
kfree(op);
return;
out_term:
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_term_exchange(vha, NULL, &op->atio, 1);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
kfree(op);
}
/* 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)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_sess *sess;
struct qla_tgt_cmd *cmd;
if (unlikely(tgt->tgt_stop)) {
ql_dbg(ql_dbg_io, vha, 0x3061,
"New command while device %p is shutting down\n", tgt);
return -EFAULT;
}
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));
op->vha = vha;
INIT_WORK(&op->work, qlt_create_sess_from_atio);
queue_work(qla_tgt_wq, &op->work);
return 0;
}
/*
* Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
*/
kref_get(&sess->se_sess->sess_kref);
cmd = qlt_get_tag(vha, sess, atio);
if (!cmd) {
ql_dbg(ql_dbg_io, vha, 0x3062,
"qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
ha->tgt.tgt_ops->put_sess(sess);
return -ENOMEM;
}
cmd->cmd_flags = 0;
cmd->jiffies_at_alloc = get_jiffies_64();
cmd->reset_count = vha->hw->chip_reset;
cmd->cmd_in_wq = 1;
cmd->cmd_flags |= BIT_0;
INIT_WORK(&cmd->work, qlt_do_work);
queue_work(qla_tgt_wq, &cmd->work);
return 0;
}
/* ha->hardware_lock supposed to be held on entry */
static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
int fn, void *iocb, int flags)
{
struct scsi_qla_host *vha = sess->vha;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_mgmt_cmd *mcmd;
int res;
uint8_t tmr_func;
mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
if (!mcmd) {
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
"qla_target(%d): Allocation of management "
"command failed, some commands and their data could "
"leak\n", vha->vp_idx);
return -ENOMEM;
}
memset(mcmd, 0, sizeof(*mcmd));
mcmd->sess = sess;
if (iocb) {
memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
sizeof(mcmd->orig_iocb.imm_ntfy));
}
mcmd->tmr_func = fn;
mcmd->flags = flags;
mcmd->reset_count = vha->hw->chip_reset;
switch (fn) {
case QLA_TGT_CLEAR_ACA:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
"qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
tmr_func = TMR_CLEAR_ACA;
break;
case QLA_TGT_TARGET_RESET:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
"qla_target(%d): TARGET_RESET received\n",
sess->vha->vp_idx);
tmr_func = TMR_TARGET_WARM_RESET;
break;
case QLA_TGT_LUN_RESET:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
"qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
tmr_func = TMR_LUN_RESET;
break;
case QLA_TGT_CLEAR_TS:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
"qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
tmr_func = TMR_CLEAR_TASK_SET;
break;
case QLA_TGT_ABORT_TS:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
"qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
tmr_func = TMR_ABORT_TASK_SET;
break;
#if 0
case QLA_TGT_ABORT_ALL:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
"qla_target(%d): Doing ABORT_ALL_TASKS\n",
sess->vha->vp_idx);
tmr_func = 0;
break;
case QLA_TGT_ABORT_ALL_SESS:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
"qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
sess->vha->vp_idx);
tmr_func = 0;
break;
case QLA_TGT_NEXUS_LOSS_SESS:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
"qla_target(%d): Doing NEXUS_LOSS_SESS\n",
sess->vha->vp_idx);
tmr_func = 0;
break;
case QLA_TGT_NEXUS_LOSS:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
"qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
tmr_func = 0;
break;
#endif
default:
ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
"qla_target(%d): Unknown task mgmt fn 0x%x\n",
sess->vha->vp_idx, fn);
mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
return -ENOSYS;
}
res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
if (res != 0) {
ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
"qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
sess->vha->vp_idx, res);
mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
return -EFAULT;
}
return 0;
}
/* ha->hardware_lock supposed to be held on entry */
static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
{
struct atio_from_isp *a = (struct atio_from_isp *)iocb;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt;
struct qla_tgt_sess *sess;
uint32_t lun, unpacked_lun;
int lun_size, fn;
tgt = vha->vha_tgt.qla_tgt;
lun = a->u.isp24.fcp_cmnd.lun;
lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
a->u.isp24.fcp_hdr.s_id);
unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
if (!sess) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
"qla_target(%d): task mgmt fn 0x%x for "
"non-existant session\n", vha->vp_idx, fn);
return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
sizeof(struct atio_from_isp));
}
return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
}
/* ha->hardware_lock supposed to be held on entry */
static int __qlt_abort_task(struct scsi_qla_host *vha,
struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
{
struct atio_from_isp *a = (struct atio_from_isp *)iocb;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_mgmt_cmd *mcmd;
uint32_t lun, unpacked_lun;
int rc;
mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
if (mcmd == NULL) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
"qla_target(%d): %s: Allocation of ABORT cmd failed\n",
vha->vp_idx, __func__);
return -ENOMEM;
}
memset(mcmd, 0, sizeof(*mcmd));
mcmd->sess = sess;
memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
sizeof(mcmd->orig_iocb.imm_ntfy));
lun = a->u.isp24.fcp_cmnd.lun;
unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
mcmd->reset_count = vha->hw->chip_reset;
rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
le16_to_cpu(iocb->u.isp2x.seq_id));
if (rc != 0) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
"qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
vha->vp_idx, rc);
mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
return -EFAULT;
}
return 0;
}
/* ha->hardware_lock supposed to be held on entry */
static int qlt_abort_task(struct scsi_qla_host *vha,
struct imm_ntfy_from_isp *iocb)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess;
int loop_id;
loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
if (sess == NULL) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
"qla_target(%d): task abort for unexisting "
"session\n", vha->vp_idx);
return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
}
return __qlt_abort_task(vha, iocb, sess);
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
struct imm_ntfy_from_isp *iocb)
{
int res = 0;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
"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);
switch (iocb->u.isp24.status_subcode) {
case ELS_PLOGI:
case ELS_FLOGI:
case ELS_PRLI:
case ELS_LOGO:
case ELS_PRLO:
res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
break;
case ELS_PDISC:
case ELS_ADISC:
{
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
if (tgt->link_reinit_iocb_pending) {
qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
0, 0, 0, 0, 0, 0);
tgt->link_reinit_iocb_pending = 0;
}
res = 1; /* send notify ack */
break;
}
default:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
"qla_target(%d): Unsupported ELS command %x "
"received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
break;
}
return res;
}
static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
{
struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
size_t first_offset = 0, rem_offset = offset, tmp = 0;
int i, sg_srr_cnt, bufflen = 0;
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
"Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
"cmd->sg_cnt: %u, direction: %d\n",
cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
/*
* FIXME: Reject non zero SRR relative offset until we can test
* this code properly.
*/
pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
return -1;
if (!cmd->sg || !cmd->sg_cnt) {
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
"Missing cmd->sg or zero cmd->sg_cnt in"
" qla_tgt_set_data_offset\n");
return -EINVAL;
}
/*
* Walk the current cmd->sg list until we locate the new sg_srr_start
*/
for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
"sg[%d]: %p page: %p, length: %d, offset: %d\n",
i, sg, sg_page(sg), sg->length, sg->offset);
if ((sg->length + tmp) > offset) {
first_offset = rem_offset;
sg_srr_start = sg;
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
"Found matching sg[%d], using %p as sg_srr_start, "
"and using first_offset: %zu\n", i, sg,
first_offset);
break;
}
tmp += sg->length;
rem_offset -= sg->length;
}
if (!sg_srr_start) {
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
"Unable to locate sg_srr_start for offset: %u\n", offset);
return -EINVAL;
}
sg_srr_cnt = (cmd->sg_cnt - i);
sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
if (!sg_srr) {
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
"Unable to allocate sgp\n");
return -ENOMEM;
}
sg_init_table(sg_srr, sg_srr_cnt);
sgp = &sg_srr[0];
/*
* Walk the remaining list for sg_srr_start, mapping to the newly
* allocated sg_srr taking first_offset into account.
*/
for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
if (first_offset) {
sg_set_page(sgp, sg_page(sg),
(sg->length - first_offset), first_offset);
first_offset = 0;
} else {
sg_set_page(sgp, sg_page(sg), sg->length, 0);
}
bufflen += sgp->length;
sgp = sg_next(sgp);
if (!sgp)
break;
}
cmd->sg = sg_srr;
cmd->sg_cnt = sg_srr_cnt;
cmd->bufflen = bufflen;
cmd->offset += offset;
cmd->free_sg = 1;
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
cmd->sg_cnt);
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
cmd->bufflen);
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
cmd->offset);
if (cmd->sg_cnt < 0)
BUG();
if (cmd->bufflen < 0)
BUG();
return 0;
}
static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
uint32_t srr_rel_offs, int *xmit_type)
{
int res = 0, rel_offs;
rel_offs = srr_rel_offs - cmd->offset;
ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
srr_rel_offs, rel_offs);
*xmit_type = QLA_TGT_XMIT_ALL;
if (rel_offs < 0) {
ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
"qla_target(%d): SRR rel_offs (%d) < 0",
cmd->vha->vp_idx, rel_offs);
res = -1;
} else if (rel_offs == cmd->bufflen)
*xmit_type = QLA_TGT_XMIT_STATUS;
else if (rel_offs > 0)
res = qlt_set_data_offset(cmd, rel_offs);
return res;
}
/* No locks, thread context */
static void qlt_handle_srr(struct scsi_qla_host *vha,
struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
{
struct imm_ntfy_from_isp *ntfy =
(struct imm_ntfy_from_isp *)&imm->imm_ntfy;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_cmd *cmd = sctio->cmd;
struct se_cmd *se_cmd = &cmd->se_cmd;
unsigned long flags;
int xmit_type = 0, resp = 0;
uint32_t offset;
uint16_t srr_ui;
offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
srr_ui = ntfy->u.isp24.srr_ui;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
cmd, srr_ui);
switch (srr_ui) {
case SRR_IU_STATUS:
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_notify_ack(vha, ntfy,
0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
xmit_type = QLA_TGT_XMIT_STATUS;
resp = 1;
break;
case SRR_IU_DATA_IN:
if (!cmd->sg || !cmd->sg_cnt) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
"Unable to process SRR_IU_DATA_IN due to"
" missing cmd->sg, state: %d\n", cmd->state);
dump_stack();
goto out_reject;
}
if (se_cmd->scsi_status != 0) {
ql_dbg(ql_dbg_tgt, vha, 0xe02a,
"Rejecting SRR_IU_DATA_IN with non GOOD "
"scsi_status\n");
goto out_reject;
}
cmd->bufflen = se_cmd->data_length;
if (qlt_has_data(cmd)) {
if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
goto out_reject;
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_notify_ack(vha, ntfy,
0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
resp = 1;
} else {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
"qla_target(%d): SRR for in data for cmd "
"without them (tag %d, SCSI status %d), "
"reject", vha->vp_idx, cmd->tag,
cmd->se_cmd.scsi_status);
goto out_reject;
}
break;
case SRR_IU_DATA_OUT:
if (!cmd->sg || !cmd->sg_cnt) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
"Unable to process SRR_IU_DATA_OUT due to"
" missing cmd->sg\n");
dump_stack();
goto out_reject;
}
if (se_cmd->scsi_status != 0) {
ql_dbg(ql_dbg_tgt, vha, 0xe02b,
"Rejecting SRR_IU_DATA_OUT"
" with non GOOD scsi_status\n");
goto out_reject;
}
cmd->bufflen = se_cmd->data_length;
if (qlt_has_data(cmd)) {
if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
goto out_reject;
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_notify_ack(vha, ntfy,
0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (xmit_type & QLA_TGT_XMIT_DATA) {
cmd->cmd_flags |= BIT_8;
qlt_rdy_to_xfer(cmd);
}
} else {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
"qla_target(%d): SRR for out data for cmd "
"without them (tag %d, SCSI status %d), "
"reject", vha->vp_idx, cmd->tag,
cmd->se_cmd.scsi_status);
goto out_reject;
}
break;
default:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
"qla_target(%d): Unknown srr_ui value %x",
vha->vp_idx, srr_ui);
goto out_reject;
}
/* Transmit response in case of status and data-in cases */
if (resp) {
cmd->cmd_flags |= BIT_7;
qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
}
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();
} else {
cmd->cmd_flags |= BIT_9;
qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
struct qla_tgt_srr_imm *imm, int ha_locked)
{
struct qla_hw_data *ha = vha->hw;
unsigned long flags = 0;
if (!ha_locked)
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
NOTIFY_ACK_SRR_FLAGS_REJECT,
NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
kfree(imm);
}
static void qlt_handle_srr_work(struct work_struct *work)
{
struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
struct scsi_qla_host *vha = tgt->vha;
struct qla_tgt_srr_ctio *sctio;
unsigned long flags;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
tgt);
restart:
spin_lock_irqsave(&tgt->srr_lock, flags);
list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
struct qla_tgt_srr_imm *imm, *i, *ti;
struct qla_tgt_cmd *cmd;
struct se_cmd *se_cmd;
imm = NULL;
list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
srr_list_entry) {
if (i->srr_id == sctio->srr_id) {
list_del(&i->srr_list_entry);
if (imm) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
"qla_target(%d): There must be "
"only one IMM SRR per CTIO SRR "
"(IMM SRR %p, id %d, CTIO %p\n",
vha->vp_idx, i, i->srr_id, sctio);
qlt_reject_free_srr_imm(tgt->vha, i, 0);
} else
imm = i;
}
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
"IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
sctio->srr_id);
if (imm == NULL) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
"Not found matching IMM for SRR CTIO (id %d)\n",
sctio->srr_id);
continue;
} else
list_del(&sctio->srr_list_entry);
spin_unlock_irqrestore(&tgt->srr_lock, flags);
cmd = sctio->cmd;
/*
* Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
* tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
* logic..
*/
cmd->offset = 0;
if (cmd->free_sg) {
kfree(cmd->sg);
cmd->sg = NULL;
cmd->free_sg = 0;
}
se_cmd = &cmd->se_cmd;
cmd->sg_cnt = se_cmd->t_data_nents;
cmd->sg = se_cmd->t_data_sg;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
"SRR cmd %p (se_cmd %p, tag %d, op %x), "
"sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
cmd->sg_cnt, cmd->offset);
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;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_srr_ctio *sctio;
tgt->imm_srr_id++;
ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
vha->vp_idx);
imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
if (imm != NULL) {
memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
/* IRQ is already OFF */
spin_lock(&tgt->srr_lock);
imm->srr_id = tgt->imm_srr_id;
list_add_tail(&imm->srr_list_entry,
&tgt->srr_imm_list);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
"IMM NTFY SRR %p added (id %d, ui %x)\n",
imm, imm->srr_id, iocb->u.isp24.srr_ui);
if (tgt->imm_srr_id == tgt->ctio_srr_id) {
int found = 0;
list_for_each_entry(sctio, &tgt->srr_ctio_list,
srr_list_entry) {
if (sctio->srr_id == imm->srr_id) {
found = 1;
break;
}
}
if (found) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
"Scheduling srr work\n");
schedule_work(&tgt->srr_work);
} else {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
"qla_target(%d): imm_srr_id "
"== ctio_srr_id (%d), but there is no "
"corresponding SRR CTIO, deleting IMM "
"SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
imm);
list_del(&imm->srr_list_entry);
kfree(imm);
spin_unlock(&tgt->srr_lock);
goto out_reject;
}
}
spin_unlock(&tgt->srr_lock);
} else {
struct qla_tgt_srr_ctio *ts;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
"qla_target(%d): Unable to allocate SRR IMM "
"entry, SRR request will be rejected\n", vha->vp_idx);
/* IRQ is already OFF */
spin_lock(&tgt->srr_lock);
list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
srr_list_entry) {
if (sctio->srr_id == tgt->imm_srr_id) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
"CTIO SRR %p deleted (id %d)\n",
sctio, sctio->srr_id);
list_del(&sctio->srr_list_entry);
qlt_send_term_exchange(vha, sctio->cmd,
&sctio->cmd->atio, 1);
kfree(sctio);
}
}
spin_unlock(&tgt->srr_lock);
goto out_reject;
}
return;
out_reject:
qlt_send_notify_ack(vha, iocb, 0, 0, 0,
NOTIFY_ACK_SRR_FLAGS_REJECT,
NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
struct imm_ntfy_from_isp *iocb)
{
struct qla_hw_data *ha = vha->hw;
uint32_t add_flags = 0;
int send_notify_ack = 1;
uint16_t status;
status = le16_to_cpu(iocb->u.isp2x.status);
switch (status) {
case IMM_NTFY_LIP_RESET:
{
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
"qla_target(%d): LIP reset (loop %#x), subcode %x\n",
vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
iocb->u.isp24.status_subcode);
if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
send_notify_ack = 0;
break;
}
case IMM_NTFY_LIP_LINK_REINIT:
{
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
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.
*/
static int __qlt_send_busy(struct scsi_qla_host *vha,
struct atio_from_isp *atio, uint16_t status)
{
struct ctio7_to_24xx *ctio24;
struct qla_hw_data *ha = vha->hw;
request_t *pkt;
struct qla_tgt_sess *sess = NULL;
sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
atio->u.isp24.fcp_hdr.s_id);
if (!sess) {
qlt_send_term_exchange(vha, NULL, atio, 1);
return 0;
}
/* Sending marker isn't necessary, since we called from ISR */
pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
if (!pkt) {
ql_dbg(ql_dbg_io, vha, 0x3063,
"qla_target(%d): %s failed: unable to allocate "
"request packet", vha->vp_idx, __func__);
return -ENOMEM;
}
pkt->entry_count = 1;
pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
ctio24 = (struct ctio7_to_24xx *)pkt;
ctio24->entry_type = CTIO_TYPE7;
ctio24->nport_handle = sess->loop_id;
ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
ctio24->vp_index = vha->vp_idx;
ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
ctio24->exchange_addr = atio->u.isp24.exchange_addr;
ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
__constant_cpu_to_le16(
CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
CTIO7_FLAGS_DONT_RET_CTIO);
/*
* CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
* if the explicit conformation is used.
*/
ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
ctio24->u.status1.scsi_status = cpu_to_le16(status);
/* Memory Barrier */
wmb();
qla2x00_start_iocbs(vha, vha->req);
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;
}
/* ha->hardware_lock supposed to be held on entry */
/* called via callback from qla2xxx */
static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
struct atio_from_isp *atio)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
int rc;
if (unlikely(tgt == NULL)) {
ql_dbg(ql_dbg_io, vha, 0x3064,
"ATIO pkt, but no tgt (ha %p)", ha);
return;
}
/*
* In tgt_stop mode we also should allow all requests to pass.
* Otherwise, some commands can stuck.
*/
tgt->irq_cmd_count++;
switch (atio->u.raw.entry_type) {
case ATIO_TYPE7:
if (unlikely(atio->u.isp24.exchange_addr ==
ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
ql_dbg(ql_dbg_io, vha, 0x3065,
"qla_target(%d): ATIO_TYPE7 "
"received with UNKNOWN exchange address, "
"sending QUEUE_FULL\n", vha->vp_idx);
qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
break;
}
if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
rc = qlt_chk_qfull_thresh_hold(vha, atio);
if (rc != 0) {
tgt->irq_cmd_count--;
return;
}
rc = qlt_handle_cmd_for_atio(vha, atio);
} else {
rc = qlt_handle_task_mgmt(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, SAM_STAT_BUSY);
#else
qlt_send_term_exchange(vha, NULL, atio, 1);
#endif
} else {
if (tgt->tgt_stop) {
ql_dbg(ql_dbg_tgt, vha, 0xe059,
"qla_target: Unable to send "
"command to target for req, "
"ignoring.\n");
} else {
ql_dbg(ql_dbg_tgt, vha, 0xe05a,
"qla_target(%d): Unable to send "
"command to target, sending BUSY "
"status.\n", vha->vp_idx);
qlt_send_busy(vha, atio, SAM_STAT_BUSY);
}
}
}
break;
case IMMED_NOTIFY_TYPE:
{
if (unlikely(atio->u.isp2x.entry_status != 0)) {
ql_dbg(ql_dbg_tgt, vha, 0xe05b,
"qla_target(%d): Received ATIO packet %x "
"with error status %x\n", vha->vp_idx,
atio->u.raw.entry_type,
atio->u.isp2x.entry_status);
break;
}
ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
break;
}
default:
ql_dbg(ql_dbg_tgt, vha, 0xe05c,
"qla_target(%d): Received unknown ATIO atio "
"type %x\n", vha->vp_idx, atio->u.raw.entry_type);
break;
}
tgt->irq_cmd_count--;
}
/* ha->hardware_lock supposed to be held on entry */
/* called via callback from qla2xxx */
static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
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) {
case CTIO_CRC2:
case CTIO_TYPE7:
{
struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
qlt_do_ctio_completion(vha, entry->handle,
le16_to_cpu(entry->status)|(pkt->entry_status << 16),
entry);
break;
}
case ACCEPT_TGT_IO_TYPE:
{
struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
int rc;
if (atio->u.isp2x.status !=
__constant_cpu_to_le16(ATIO_CDB_VALID)) {
ql_dbg(ql_dbg_tgt, vha, 0xe05e,
"qla_target(%d): ATIO with error "
"status %x received\n", vha->vp_idx,
le16_to_cpu(atio->u.isp2x.status));
break;
}
rc = qlt_chk_qfull_thresh_hold(vha, atio);
if (rc != 0) {
tgt->irq_cmd_count--;
return;
}
rc = qlt_handle_cmd_for_atio(vha, atio);
if (unlikely(rc != 0)) {
if (rc == -ESRCH) {
#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
qlt_send_busy(vha, atio, 0);
#else
qlt_send_term_exchange(vha, NULL, atio, 1);
#endif
} else {
if (tgt->tgt_stop) {
ql_dbg(ql_dbg_tgt, vha, 0xe05f,
"qla_target: Unable to send "
"command to target, sending TERM "
"EXCHANGE for rsp\n");
qlt_send_term_exchange(vha, NULL,
atio, 1);
} else {
ql_dbg(ql_dbg_tgt, vha, 0xe060,
"qla_target(%d): Unable to send "
"command to target, sending BUSY "
"status\n", vha->vp_idx);
qlt_send_busy(vha, atio, 0);
}
}
}
}
break;
case CONTINUE_TGT_IO_TYPE:
{
struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
qlt_do_ctio_completion(vha, entry->handle,
le16_to_cpu(entry->status)|(pkt->entry_status << 16),
entry);
break;
}
case CTIO_A64_TYPE:
{
struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
qlt_do_ctio_completion(vha, entry->handle,
le16_to_cpu(entry->status)|(pkt->entry_status << 16),
entry);
break;
}
case IMMED_NOTIFY_TYPE:
ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
break;
case NOTIFY_ACK_TYPE:
if (tgt->notify_ack_expected > 0) {
struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
ql_dbg(ql_dbg_tgt, vha, 0xe036,
"NOTIFY_ACK seq %08x status %x\n",
le16_to_cpu(entry->u.isp2x.seq_id),
le16_to_cpu(entry->u.isp2x.status));
tgt->notify_ack_expected--;
if (entry->u.isp2x.status !=
__constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
ql_dbg(ql_dbg_tgt, vha, 0xe061,
"qla_target(%d): NOTIFY_ACK "
"failed %x\n", vha->vp_idx,
le16_to_cpu(entry->u.isp2x.status));
}
} else {
ql_dbg(ql_dbg_tgt, vha, 0xe062,
"qla_target(%d): Unexpected NOTIFY_ACK received\n",
vha->vp_idx);
}
break;
case ABTS_RECV_24XX:
ql_dbg(ql_dbg_tgt, vha, 0xe037,
"ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
break;
case ABTS_RESP_24XX:
if (tgt->abts_resp_expected > 0) {
struct abts_resp_from_24xx_fw *entry =
(struct abts_resp_from_24xx_fw *)pkt;
ql_dbg(ql_dbg_tgt, vha, 0xe038,
"ABTS_RESP_24XX: compl_status %x\n",
entry->compl_status);
tgt->abts_resp_expected--;
if (le16_to_cpu(entry->compl_status) !=
ABTS_RESP_COMPL_SUCCESS) {
if ((entry->error_subcode1 == 0x1E) &&
(entry->error_subcode2 == 0)) {
/*
* We've got a race here: aborted
* exchange not terminated, i.e.
* response for the aborted command was
* sent between the abort request was
* received and processed.
* Unfortunately, the firmware has a
* silly requirement that all aborted
* exchanges must be explicitely
* terminated, otherwise it refuses to
* send responses for the abort
* requests. So, we have to
* (re)terminate the exchange and retry
* the abort response.
*/
qlt_24xx_retry_term_exchange(vha,
entry);
} else
ql_dbg(ql_dbg_tgt, vha, 0xe063,
"qla_target(%d): ABTS_RESP_24XX "
"failed %x (subcode %x:%x)",
vha->vp_idx, entry->compl_status,
entry->error_subcode1,
entry->error_subcode2);
}
} else {
ql_dbg(ql_dbg_tgt, vha, 0xe064,
"qla_target(%d): Unexpected ABTS_RESP_24XX "
"received\n", vha->vp_idx);
}
break;
default:
ql_dbg(ql_dbg_tgt, vha, 0xe065,
"qla_target(%d): Received unknown response pkt "
"type %x\n", vha->vp_idx, pkt->entry_type);
break;
}
tgt->irq_cmd_count--;
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
uint16_t *mailbox)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
int login_code;
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 "
"occurred", vha->vp_idx, code);
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,
"qla_target(%d): Async LOOP_UP occurred "
"(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
if (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,
"qla_target(%d): Async event %#x occurred "
"(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]));
break;
case MBA_PORT_UPDATE:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
"qla_target(%d): Port update async event %#x "
"occurred: updating the ports database (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]));
login_code = le16_to_cpu(mailbox[2]);
if (login_code == 0x4)
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
"Async MB 2: Got PLOGI Complete\n");
else if (login_code == 0x7)
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
"Async MB 2: Port Logged Out\n");
break;
default:
break;
}
tgt->irq_cmd_count--;
}
static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
uint16_t loop_id)
{
fc_port_t *fcport;
int rc;
fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
if (!fcport) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
"qla_target(%d): Allocation of tmp FC port failed",
vha->vp_idx);
return NULL;
}
fcport->loop_id = loop_id;
rc = qla2x00_get_port_database(vha, fcport, 0);
if (rc != QLA_SUCCESS) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
"qla_target(%d): Failed to retrieve fcport "
"information -- get_port_database() returned %x "
"(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
kfree(fcport);
return NULL;
}
return fcport;
}
/* Must be called under tgt_mutex */
static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
uint8_t *s_id)
{
struct qla_tgt_sess *sess = NULL;
fc_port_t *fcport = NULL;
int rc, global_resets;
uint16_t loop_id = 0;
retry:
global_resets =
atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
if (rc != 0) {
if ((s_id[0] == 0xFF) &&
(s_id[1] == 0xFC)) {
/*
* This is Domain Controller, so it should be
* OK to drop SCSI commands from it.
*/
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
"Unable to find initiator with S_ID %x:%x:%x",
s_id[0], s_id[1], s_id[2]);
} else
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
"qla_target(%d): Unable to find "
"initiator with S_ID %x:%x:%x",
vha->vp_idx, s_id[0], s_id[1],
s_id[2]);
return NULL;
}
fcport = qlt_get_port_database(vha, loop_id);
if (!fcport)
return NULL;
if (global_resets !=
atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
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,
atomic_read(&vha->vha_tgt.
qla_tgt->tgt_global_resets_count));
goto retry;
}
sess = qlt_create_sess(vha, fcport, true);
kfree(fcport);
return sess;
}
static void qlt_abort_work(struct qla_tgt *tgt,
struct qla_tgt_sess_work_param *prm)
{
struct scsi_qla_host *vha = tgt->vha;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess = NULL;
unsigned long flags;
uint32_t be_s_id;
uint8_t s_id[3];
int rc;
spin_lock_irqsave(&ha->hardware_lock, flags);
if (tgt->tgt_stop)
goto out_term;
s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
(unsigned char *)&be_s_id);
if (!sess) {
spin_unlock_irqrestore(&ha->hardware_lock, flags);
mutex_lock(&vha->vha_tgt.tgt_mutex);
sess = qlt_make_local_sess(vha, s_id);
/* sess has got an extra creation ref */
mutex_unlock(&vha->vha_tgt.tgt_mutex);
spin_lock_irqsave(&ha->hardware_lock, flags);
if (!sess)
goto out_term;
} else {
kref_get(&sess->se_sess->sess_kref);
}
if (tgt->tgt_stop)
goto out_term;
rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
if (rc != 0)
goto out_term;
ha->tgt.tgt_ops->put_sess(sess);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return;
out_term:
qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
if (sess)
ha->tgt.tgt_ops->put_sess(sess);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static void qlt_tmr_work(struct qla_tgt *tgt,
struct qla_tgt_sess_work_param *prm)
{
struct atio_from_isp *a = &prm->tm_iocb2;
struct scsi_qla_host *vha = tgt->vha;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess = NULL;
unsigned long flags;
uint8_t *s_id = NULL; /* to hide compiler warnings */
int rc;
uint32_t lun, unpacked_lun;
int lun_size, fn;
void *iocb;
spin_lock_irqsave(&ha->hardware_lock, flags);
if (tgt->tgt_stop)
goto out_term;
s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
if (!sess) {
spin_unlock_irqrestore(&ha->hardware_lock, flags);
mutex_lock(&vha->vha_tgt.tgt_mutex);
sess = qlt_make_local_sess(vha, s_id);
/* sess has got an extra creation ref */
mutex_unlock(&vha->vha_tgt.tgt_mutex);
spin_lock_irqsave(&ha->hardware_lock, flags);
if (!sess)
goto out_term;
} else {
kref_get(&sess->se_sess->sess_kref);
}
iocb = a;
lun = a->u.isp24.fcp_cmnd.lun;
lun_size = sizeof(lun);
fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
if (rc != 0)
goto out_term;
ha->tgt.tgt_ops->put_sess(sess);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return;
out_term:
qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
if (sess)
ha->tgt.tgt_ops->put_sess(sess);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
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;
if (!IS_TGT_MODE_CAPABLE(ha)) {
ql_log(ql_log_warn, base_vha, 0xe070,
"This adapter does not support target mode.\n");
return 0;
}
ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
"Registering target for host %ld(%p).\n", base_vha->host_no, ha);
BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
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);
base_vha->vha_tgt.qla_tgt = tgt;
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;
if (base_vha->fc_vport)
return 0;
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)
{
if (!vha->vha_tgt.qla_tgt)
return 0;
if (vha->fc_vport) {
qlt_release(vha->vha_tgt.qla_tgt);
return 0;
}
/* free left over qfull cmds */
qlt_init_term_exchange(vha);
mutex_lock(&qla_tgt_mutex);
list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
mutex_unlock(&qla_tgt_mutex);
ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
vha->host_no, ha);
qlt_release(vha->vha_tgt.qla_tgt);
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
*/
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))
{
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);
if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
host->host_no);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
continue;
}
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;
}
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;
}
qlt_lport_dump(vha, phys_wwpn, b);
if (memcmp(vha->port_name, b, WWN_SIZE)) {
scsi_host_put(host);
continue;
}
rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
if (rc != 0)
scsi_host_put(host);
mutex_unlock(&qla_tgt_mutex);
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
*/
vha->vha_tgt.target_lport_ptr = NULL;
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 */
static void qlt_set_mode(struct scsi_qla_host *vha)
{
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 */
static void qlt_clear_mode(struct scsi_qla_host *vha)
{
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;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
unsigned long flags;
scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
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);
if (vha->vp_idx) {
qla24xx_disable_vp(vha);
qla24xx_enable_vp(vha);
} else {
set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
qla2xxx_wake_dpc(base_vha);
qla2x00_wait_for_hba_online(base_vha);
}
}
EXPORT_SYMBOL(qlt_enable_vha);
/*
* qla_tgt_disable_vha - NO LOCK HELD
*
* Disable Target Mode and reset the adapter
*/
static void qlt_disable_vha(struct scsi_qla_host *vha)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
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;
vha->vha_tgt.qla_tgt = NULL;
mutex_init(&vha->vha_tgt.tgt_mutex);
mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
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;
qlt_add_target(ha, vha);
}
void
qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
{
/*
* FC-4 Feature bit 0 indicates target functionality to the name server.
*/
if (qla_tgt_mode_enabled(vha)) {
if (qla_ini_mode_enabled(vha))
ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
else
ct_req->req.rff_id.fc4_feature = BIT_0;
} else if (qla_ini_mode_enabled(vha)) {
ct_req->req.rff_id.fc4_feature = BIT_1;
}
}
/*
* qlt_init_atio_q_entries() - Initializes ATIO queue entries.
* @ha: HA context
*
* Beginning of ATIO ring has initialization control block already built
* by nvram config routine.
*
* Returns 0 on success.
*/
void
qlt_init_atio_q_entries(struct scsi_qla_host *vha)
{
struct qla_hw_data *ha = vha->hw;
uint16_t cnt;
struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
if (!qla_tgt_mode_enabled(vha))
return;
for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
pkt->u.raw.signature = ATIO_PROCESSED;
pkt++;
}
}
/*
* qlt_24xx_process_atio_queue() - Process ATIO queue entries.
* @ha: SCSI driver HA context
*/
void
qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
{
struct qla_hw_data *ha = vha->hw;
struct atio_from_isp *pkt;
int cnt, i;
if (!vha->flags.online)
return;
while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
cnt = pkt->u.raw.entry_count;
qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
for (i = 0; i < cnt; i++) {
ha->tgt.atio_ring_index++;
if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
ha->tgt.atio_ring_index = 0;
ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
} else
ha->tgt.atio_ring_ptr++;
pkt->u.raw.signature = ATIO_PROCESSED;
pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
}
wmb();
}
/* Adjust ring index */
WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
}
void
qlt_24xx_config_rings(struct scsi_qla_host *vha)
{
struct qla_hw_data *ha = vha->hw;
if (!QLA_TGT_MODE_ENABLED())
return;
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);
}
}
void
qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
{
struct qla_hw_data *ha = vha->hw;
if (qla_tgt_mode_enabled(vha)) {
if (!ha->tgt.saved_set) {
/* We save only once */
ha->tgt.saved_exchange_count = nv->exchange_count;
ha->tgt.saved_firmware_options_1 =
nv->firmware_options_1;
ha->tgt.saved_firmware_options_2 =
nv->firmware_options_2;
ha->tgt.saved_firmware_options_3 =
nv->firmware_options_3;
ha->tgt.saved_set = 1;
}
nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
/* Enable target mode */
nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
/* Disable ini mode, if requested */
if (!qla_ini_mode_enabled(vha))
nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
/* Disable Full Login after LIP */
nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
/* Enable initial LIP */
nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
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);
/* Disable Full Login after LIP */
nv->host_p &= __constant_cpu_to_le32(~BIT_10);
/* Enable target PRLI control */
nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
} else {
if (ha->tgt.saved_set) {
nv->exchange_count = ha->tgt.saved_exchange_count;
nv->firmware_options_1 =
ha->tgt.saved_firmware_options_1;
nv->firmware_options_2 =
ha->tgt.saved_firmware_options_2;
nv->firmware_options_3 =
ha->tgt.saved_firmware_options_3;
}
return;
}
/* out-of-order frames reassembly */
nv->firmware_options_3 |= BIT_6|BIT_9;
if (ha->tgt.enable_class_2) {
if (vha->flags.init_done)
fc_host_supported_classes(vha->host) =
FC_COS_CLASS2 | FC_COS_CLASS3;
nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
} else {
if (vha->flags.init_done)
fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
}
}
void
qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
struct init_cb_24xx *icb)
{
struct qla_hw_data *ha = vha->hw;
if (ha->tgt.node_name_set) {
memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
}
}
void
qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
{
struct qla_hw_data *ha = vha->hw;
if (!QLA_TGT_MODE_ENABLED())
return;
if (qla_tgt_mode_enabled(vha)) {
if (!ha->tgt.saved_set) {
/* We save only once */
ha->tgt.saved_exchange_count = nv->exchange_count;
ha->tgt.saved_firmware_options_1 =
nv->firmware_options_1;
ha->tgt.saved_firmware_options_2 =
nv->firmware_options_2;
ha->tgt.saved_firmware_options_3 =
nv->firmware_options_3;
ha->tgt.saved_set = 1;
}
nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
/* Enable target mode */
nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
/* Disable ini mode, if requested */
if (!qla_ini_mode_enabled(vha))
nv->firmware_options_1 |=
__constant_cpu_to_le32(BIT_5);
/* Disable Full Login after LIP */
nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
/* Enable initial LIP */
nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
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);
/* Disable Full Login after LIP */
nv->host_p &= __constant_cpu_to_le32(~BIT_10);
/* Enable target PRLI control */
nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
} else {
if (ha->tgt.saved_set) {
nv->exchange_count = ha->tgt.saved_exchange_count;
nv->firmware_options_1 =
ha->tgt.saved_firmware_options_1;
nv->firmware_options_2 =
ha->tgt.saved_firmware_options_2;
nv->firmware_options_3 =
ha->tgt.saved_firmware_options_3;
}
return;
}
/* out-of-order frames reassembly */
nv->firmware_options_3 |= BIT_6|BIT_9;
if (ha->tgt.enable_class_2) {
if (vha->flags.init_done)
fc_host_supported_classes(vha->host) =
FC_COS_CLASS2 | FC_COS_CLASS3;
nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
} else {
if (vha->flags.init_done)
fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
}
}
void
qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
struct init_cb_81xx *icb)
{
struct qla_hw_data *ha = vha->hw;
if (!QLA_TGT_MODE_ENABLED())
return;
if (ha->tgt.node_name_set) {
memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
}
}
void
qlt_83xx_iospace_config(struct qla_hw_data *ha)
{
if (!QLA_TGT_MODE_ENABLED())
return;
ha->msix_count += 1; /* For ATIO Q */
}
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:
case CTIO_CRC2:
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;
if (ha->mqenable || IS_QLA83XX(ha)) {
ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
} else {
ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
}
mutex_init(&base_vha->vha_tgt.tgt_mutex);
mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
qlt_clear_mode(base_vha);
}
irqreturn_t
qla83xx_msix_atio_q(int irq, void *dev_id)
{
struct rsp_que *rsp;
scsi_qla_host_t *vha;
struct qla_hw_data *ha;
unsigned long flags;
rsp = (struct rsp_que *) dev_id;
ha = rsp->hw;
vha = pci_get_drvdata(ha->pdev);
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_24xx_process_atio_queue(vha);
qla24xx_process_response_queue(vha, rsp);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return IRQ_HANDLED;
}
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");
return -ENOMEM;
}
qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
if (!qla_tgt_mgmt_cmd_mempool) {
ql_log(ql_log_fatal, NULL, 0xe06e,
"mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
ret = -ENOMEM;
goto out_mgmt_cmd_cachep;
}
qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
if (!qla_tgt_wq) {
ql_log(ql_log_fatal, NULL, 0xe06f,
"alloc_workqueue for qla_tgt_wq failed\n");
ret = -ENOMEM;
goto out_cmd_mempool;
}
/*
* Return 1 to signal that initiator-mode is being disabled
*/
return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
out_cmd_mempool:
mempool_destroy(qla_tgt_mgmt_cmd_mempool);
out_mgmt_cmd_cachep:
kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
return ret;
}
void qlt_exit(void)
{
if (!QLA_TGT_MODE_ENABLED())
return;
destroy_workqueue(qla_tgt_wq);
mempool_destroy(qla_tgt_mgmt_cmd_mempool);
kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
}
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