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linux/drivers/scsi/qla2xxx/qla_target.c
Tejun Heo 43829731dd workqueue: deprecate flush[_delayed]_work_sync() 
flush[_delayed]_work_sync() are now spurious.  Mark them deprecated
and convert all users to flush[_delayed]_work().

If you're cc'd and wondering what's going on: Now all workqueues are
non-reentrant and the regular flushes guarantee that the work item is
not pending or running on any CPU on return, so there's no reason to
use the sync flushes at all and they're going away.

This patch doesn't make any functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Mattia Dongili <malattia@linux.it>
Cc: Kent Yoder <key@linux.vnet.ibm.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Bryan Wu <bryan.wu@canonical.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Petr Vandrovec <petr@vandrovec.name>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Avi Kivity <avi@redhat.com>
2012-08-20 14:51:24 -07:00

4964 lines
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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) 2010-2011 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 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.");
static int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
/*
* 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. contigent 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);
/*
* Global Variables
*/
static struct kmem_cache *qla_tgt_cmd_cachep;
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;
}
void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
struct atio_from_isp *atio)
{
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_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, 1);
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 "
"%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, "
"mcmd %x, loop_id %d)\n", vha->host_no, sess,
sess->port_name[0], sess->port_name[1],
sess->port_name[2], sess->port_name[3],
sess->port_name[4], sess->port_name[5],
sess->port_name[6], sess->port_name[7],
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 %02x:%02x:%02x:"
"%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for "
"deletion in %u secs (expires: %lu) immed: %d\n",
sess->vha->vp_idx,
sess->port_name[0], sess->port_name[1],
sess->port_name[2], sess->port_name[3],
sess->port_name[4], sess->port_name[5],
sess->port_name[6], sess->port_name[7],
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,
jiffies - sess->expires);
}
/* ha->hardware_lock supposed to be held on entry */
static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
{
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;
}
static bool qlt_check_fcport_exist(struct scsi_qla_host *vha,
struct qla_tgt_sess *sess)
{
struct qla_hw_data *ha = vha->hw;
struct qla_port_24xx_data *pmap24;
bool res, found = false;
int rc, i;
uint16_t loop_id = 0xFFFF; /* to eliminate compiler's warning */
uint16_t entries;
void *pmap;
int pmap_len;
fc_port_t *fcport;
int global_resets;
retry:
global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
rc = qla2x00_get_node_name_list(vha, &pmap, &pmap_len);
if (rc != QLA_SUCCESS) {
res = false;
goto out;
}
pmap24 = pmap;
entries = pmap_len/sizeof(*pmap24);
for (i = 0; i < entries; ++i) {
if (!memcmp(sess->port_name, pmap24[i].port_name, WWN_SIZE)) {
loop_id = le16_to_cpu(pmap24[i].loop_id);
found = true;
break;
}
}
kfree(pmap);
if (!found) {
res = false;
goto out;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf046,
"qlt_check_fcport_exist(): loop_id %d", loop_id);
fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
if (fcport == NULL) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf047,
"qla_target(%d): Allocation of tmp FC port failed",
vha->vp_idx);
res = false;
goto out;
}
fcport->loop_id = loop_id;
rc = qla2x00_get_port_database(vha, fcport, 0);
if (rc != QLA_SUCCESS) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf048,
"qla_target(%d): Failed to retrieve fcport "
"information -- get_port_database() returned %x "
"(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
res = false;
goto out_free_fcport;
}
if (global_resets !=
atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
"qla_target(%d): global reset during session discovery"
" (counter was %d, new %d), retrying",
vha->vp_idx, global_resets,
atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
goto retry;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
"Updating sess %p s_id %x:%x:%x, loop_id %d) 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);
sess->s_id = fcport->d_id;
sess->loop_id = fcport->loop_id;
sess->conf_compl_supported = !!(fcport->flags &
FCF_CONF_COMP_SUPPORTED);
res = true;
out_free_fcport:
kfree(fcport);
out:
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;
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);
if (time_after_eq(jiffies, sess->expires)) {
bool cancel;
qlt_undelete_sess(sess);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
cancel = qlt_check_fcport_exist(vha, sess);
if (cancel) {
if (sess->deleted) {
/*
* sess was again deleted while we were
* discovering it
*/
spin_lock_irqsave(&ha->hardware_lock,
flags);
continue;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf049,
"qla_target(%d): cancel deletion of "
"session for port %02x:%02x:%02x:%02x:%02x:"
"%02x:%02x:%02x (loop ID %d), because "
" it isn't deleted by firmware",
vha->vp_idx, sess->port_name[0],
sess->port_name[1], sess->port_name[2],
sess->port_name[3], sess->port_name[4],
sess->port_name[5], sess->port_name[6],
sess->port_name[7], sess->loop_id);
} else {
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);
}
spin_lock_irqsave(&ha->hardware_lock, flags);
} else {
schedule_delayed_work(&tgt->sess_del_work,
jiffies - sess->expires);
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, &ha->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);
sess->s_id = fcport->d_id;
sess->loop_id = fcport->loop_id;
sess->conf_compl_supported = !!(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 %02x:%02x:%02x:%02x:"
"%02x:%02x:%02x:%02x will be refused", vha->vp_idx,
fcport->port_name[0], fcport->port_name[1],
fcport->port_name[2], fcport->port_name[3],
fcport->port_name[4], fcport->port_name[5],
fcport->port_name[6], fcport->port_name[7]);
return NULL;
}
sess->tgt = ha->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, ha->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, &ha->tgt.qla_tgt->sess_list);
ha->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 %02x:%02x:%02x:%02x:"
"%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed"
" completion %ssupported) added\n",
vha->vp_idx, local ? "local " : "", fcport->port_name[0],
fcport->port_name[1], fcport->port_name[2], fcport->port_name[3],
fcport->port_name[4], fcport->port_name[5], fcport->port_name[6],
fcport->port_name[7], 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 = ha->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);
mutex_lock(&ha->tgt.tgt_mutex);
sess = qlt_create_sess(vha, fcport, false);
mutex_unlock(&ha->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 %02x:"
"%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) "
"reappeared\n", vha->vp_idx, sess->local ? "local "
: "", sess->port_name[0], sess->port_name[1],
sess->port_name[2], sess->port_name[3],
sess->port_name[4], sess->port_name[5],
sess->port_name[6], sess->port_name[7],
sess->loop_id);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
"Reappeared sess %p\n", sess);
}
sess->s_id = fcport->d_id;
sess->loop_id = fcport->loop_id;
sess->conf_compl_supported = !!(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 %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
"(loop ID %d) became global\n", vha->vp_idx,
fcport->port_name[0], fcport->port_name[1],
fcport->port_name[2], fcport->port_name[3],
fcport->port_name[4], fcport->port_name[5],
fcport->port_name[6], fcport->port_name[7],
sess->loop_id);
sess->local = 0;
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
ha->tgt.tgt_ops->put_sess(sess);
}
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 = ha->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 */
void qlt_stop_phase1(struct qla_tgt *tgt)
{
struct scsi_qla_host *vha = tgt->vha;
struct qla_hw_data *ha = tgt->ha;
unsigned long flags;
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");
dump_stack();
return;
}
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(&ha->tgt.tgt_mutex);
spin_lock_irqsave(&ha->hardware_lock, flags);
tgt->tgt_stop = 1;
qlt_clear_tgt_db(tgt, true);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
mutex_unlock(&ha->tgt.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));
}
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;
unsigned long flags;
if (tgt->tgt_stopped) {
ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
"Already in tgt->tgt_stopped state\n");
dump_stack();
return;
}
ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
"Waiting for %d IRQ commands to complete (tgt %p)",
tgt->irq_cmd_count, tgt);
mutex_lock(&ha->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(&ha->tgt.tgt_mutex);
ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
tgt);
}
EXPORT_SYMBOL(qlt_stop_phase2);
/* Called from qlt_remove_target() -> qla2x00_remove_one() */
void qlt_release(struct qla_tgt *tgt)
{
struct qla_hw_data *ha = tgt->ha;
if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
qlt_stop_phase2(tgt);
ha->tgt.qla_tgt = NULL;
ql_dbg(ql_dbg_tgt_mgt, tgt->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 (ha->tgt.qla_tgt != NULL)
ha->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.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);
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(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 */
}
ha->tgt.qla_tgt->abts_resp_expected++;
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(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 = entry->fcp_hdr_le.ox_id;
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 qla_tgt_mgmt_cmd *mcmd;
int rc;
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));
rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, 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(ha->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;
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);
ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
ctio->u.status1.scsi_status =
__constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
ctio->u.status1.response_len = __constant_cpu_to_le16(8);
((uint32_t *)ctio->u.status1.sense_data)[0] = cpu_to_be32(resp_code);
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 (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 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);
ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
prm->seg_cnt, prm->req_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 inline void qlt_unmap_sg(struct scsi_qla_host *vha,
struct qla_tgt_cmd *cmd)
{
struct qla_hw_data *ha = vha->hw;
BUG_ON(!cmd->sg_mapped);
pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
cmd->sg_mapped = 0;
}
static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
uint32_t req_cnt)
{
struct qla_hw_data *ha = vha->hw;
device_reg_t __iomem *reg = ha->iobase;
uint32_t cnt;
if (vha->req->cnt < (req_cnt + 2)) {
cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
ql_dbg(ql_dbg_tgt, vha, 0xe00a,
"Request ring circled: cnt=%d, vha->->ring_index=%d, "
"vha->req->cnt=%d, req_cnt=%d\n", cnt,
vha->req->ring_index, vha->req->cnt, req_cnt);
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_tgt, vha, 0xe00b,
"qla_target(%d): There is no room in the "
"request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
"req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
vha->req->cnt, req_cnt);
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 > MAX_OUTSTANDING_COMMANDS)
h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
if (h == ha->tgt.current_handle) {
ql_dbg(ql_dbg_tgt, vha, 0xe04e,
"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;
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);
pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
ql_dbg(ql_dbg_tgt, vha, 0xe00c,
"qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
le16_to_cpu(pkt->u.status0.ox_id));
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));
ql_dbg(ql_dbg_tgt, vha, 0xe00d,
"S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
(long long unsigned int)
pci_dma_hi32(sg_dma_address(prm->sg)),
(long long unsigned int)
pci_dma_lo32(sg_dma_address(prm->sg)),
(int)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;
ql_dbg(ql_dbg_tgt, vha, 0xe00e,
"iocb->scsi_status=%x, iocb->flags=%x\n",
le16_to_cpu(pkt24->u.status0.scsi_status),
le16_to_cpu(pkt24->u.status0.flags));
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 */
ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
/* 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));
ql_dbg(ql_dbg_tgt, vha, 0xe010,
"S/G Segment phys_addr=%llx:%llx, len=%d\n",
(long long unsigned int)pci_dma_hi32(sg_dma_address(
prm->sg)),
(long long unsigned int)pci_dma_lo32(sg_dma_address(
prm->sg)),
(int)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;
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;
}
ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
vha->vp_idx, cmd->tag);
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;
ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
prm->rq_result, xmit_type);
/* Send marker if required */
if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
return -EFAULT;
ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
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_tgt, vha, 0xe014,
"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_tgt, vha, 0xe015,
"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)++;
}
}
}
ql_dbg(ql_dbg_tgt, vha, 0xe016,
"req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
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 ??? */
}
/*
* 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\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
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);
/* 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;
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);
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_tgt, vha, 0xe019,
"Building additional status packet\n");
memcpy(ctio, pkt, sizeof(*ctio));
ctio->entry_count = 1;
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((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 */
ql_dbg(ql_dbg_tgt, vha, 0xe01a,
"Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
pkt, scsi_status);
qla2x00_start_iocbs(vha, vha->req);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return 0;
out_unmap_unlock:
if (cmd->sg_mapped)
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;
ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
(int)vha->vp_idx);
/* Calculate number of entries and segments required */
if (qlt_pci_map_calc_cnt(&prm) != 0)
return -EAGAIN;
spin_lock_irqsave(&ha->hardware_lock, flags);
/* 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;
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);
qlt_load_data_segments(&prm, vha);
cmd->state = QLA_TGT_STATE_NEED_DATA;
qla2x00_start_iocbs(vha, vha->req);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return res;
out_unlock_free_unmap:
if (cmd->sg_mapped)
qlt_unmap_sg(vha, cmd);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return res;
}
EXPORT_SYMBOL(qlt_rdy_to_xfer);
/* 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;
ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
pkt = (request_t *)qla2x00_alloc_iocbs(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);
ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
/* 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;
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);
goto done;
}
spin_lock_irqsave(&vha->hw->hardware_lock, flags);
rc = __qlt_send_term_exchange(vha, cmd, atio);
spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
done:
if (rc == 1) {
if (!ha_locked && !in_interrupt())
msleep(250); /* just in case */
vha->hw->tgt.tgt_ops->free_cmd(cmd);
}
}
void qlt_free_cmd(struct qla_tgt_cmd *cmd)
{
BUG_ON(cmd->sg_mapped);
if (unlikely(cmd->free_sg))
kfree(cmd->sg);
kmem_cache_free(qla_tgt_cmd_cachep, cmd);
}
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_hw_data *ha = vha->hw;
struct qla_tgt *tgt = ha->tgt.qla_tgt;
struct qla_tgt_srr_imm *imm;
tgt->ctio_srr_id++;
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)) {
ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
"SKIP_HANDLE CTIO\n");
return NULL;
}
/* handle-1 is actually used */
if (unlikely(handle > MAX_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;
}
/*
* 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;
ql_dbg(ql_dbg_tgt, vha, 0xe01e,
"qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
vha->vp_idx, ctio, status, handle);
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;
if (cmd->sg_mapped)
qlt_unmap_sg(vha, cmd);
if (unlikely(status != CTIO_SUCCESS)) {
switch (status & 0xFFFF) {
case CTIO_LIP_RESET:
case CTIO_TARGET_RESET:
case CTIO_ABORTED:
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;
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;
}
if (cmd->state != QLA_TGT_STATE_NEED_DATA)
if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
return;
}
if (cmd->state == QLA_TGT_STATE_PROCESSED) {
ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
} 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;
ql_dbg(ql_dbg_tgt, vha, 0xe020,
"Data received, context %x, rx_status %d\n",
0x0, rx_status);
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)) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
dump_stack();
}
ha->tgt.tgt_ops->free_cmd(cmd);
}
/* ha->hardware_lock supposed to be held on entry */
/* called via callback from qla2xxx */
void qlt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = ha->tgt.qla_tgt;
if (likely(tgt == NULL)) {
ql_dbg(ql_dbg_tgt, vha, 0xe021,
"CTIO, but target mode not enabled"
" (ha %d %p handle %#x)", vha->vp_idx, ha, handle);
return;
}
tgt->irq_cmd_count++;
qlt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL);
tgt->irq_cmd_count--;
}
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 = MSG_SIMPLE_TAG;
break;
case ATIO_HEAD_OF_QUEUE:
fcp_task_attr = MSG_HEAD_TAG;
break;
case ATIO_ORDERED_QUEUE:
fcp_task_attr = MSG_ORDERED_TAG;
break;
case ATIO_ACA_QUEUE:
fcp_task_attr = MSG_ACA_TAG;
break;
case ATIO_UNTAGGED:
fcp_task_attr = MSG_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 = MSG_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 work_struct *work)
{
struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
scsi_qla_host_t *vha = cmd->vha;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = ha->tgt.qla_tgt;
struct qla_tgt_sess *sess = NULL;
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;
if (tgt->tgt_stop)
goto out_term;
spin_lock_irqsave(&ha->hardware_lock, flags);
sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
atio->u.isp24.fcp_hdr.s_id);
/* Do kref_get() before dropping qla_hw_data->hardware_lock. */
if (sess)
kref_get(&sess->se_sess->sess_kref);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (unlikely(!sess)) {
uint8_t *s_id = 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 (atio->u.raw.entry_count > 1) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
"Dropping multy entry cmd %p\n", cmd);
goto out_term;
}
mutex_lock(&ha->tgt.tgt_mutex);
sess = qlt_make_local_sess(vha, s_id);
/* sess has an extra creation ref. */
mutex_unlock(&ha->tgt.tgt_mutex);
if (!sess)
goto out_term;
}
cmd->sess = sess;
cmd->loop_id = sess->loop_id;
cmd->conf_compl_supported = sess->conf_compl_supported;
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]));
ql_dbg(ql_dbg_tgt, vha, 0xe022,
"qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
cmd, cmd->unpacked_lun, cmd->tag);
ret = vha->hw->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*(
*/
ha->tgt.tgt_ops->put_sess(sess);
return;
out_term:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "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.
*/
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
kmem_cache_free(qla_tgt_cmd_cachep, cmd);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (sess)
ha->tgt.tgt_ops->put_sess(sess);
}
/* 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 = ha->tgt.qla_tgt;
struct qla_tgt_cmd *cmd;
if (unlikely(tgt->tgt_stop)) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
"New command while device %p is shutting down\n", tgt);
return -EFAULT;
}
cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
if (!cmd) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
"qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
return -ENOMEM;
}
INIT_LIST_HEAD(&cmd->cmd_list);
memcpy(&cmd->atio, atio, sizeof(*atio));
cmd->state = QLA_TGT_STATE_NEW;
cmd->tgt = ha->tgt.qla_tgt;
cmd->vha = vha;
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;
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 = ha->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);
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(ha->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)
{
struct qla_hw_data *ha = vha->hw;
int res = 0;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
"qla_target(%d): Port ID: 0x%02x:%02x:%02x"
" ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0],
iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2],
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 = ha->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)
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)
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
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[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_hw_data *ha = vha->hw;
struct qla_tgt *tgt = ha->tgt.qla_tgt;
struct qla_tgt_srr_ctio *sctio;
tgt->imm_srr_id++;
ql_dbg(ql_dbg_tgt_mgt, 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 = ha->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 void 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;
}
/* Sending marker isn't necessary, since we called from ISR */
pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
if (!pkt) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
"qla_target(%d): %s failed: unable to allocate "
"request packet", vha->vp_idx, __func__);
return;
}
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);
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;
qla2x00_start_iocbs(vha, vha->req);
}
/* 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 = ha->tgt.qla_tgt;
int rc;
if (unlikely(tgt == NULL)) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
"ATIO pkt, but no tgt (ha %p)", ha);
return;
}
ql_dbg(ql_dbg_tgt, vha, 0xe02c,
"qla_target(%d): ATIO pkt %p: type %02x count %02x",
vha->vp_idx, atio, atio->u.raw.entry_type,
atio->u.raw.entry_count);
/*
* 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:
ql_dbg(ql_dbg_tgt, vha, 0xe02d,
"ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
"add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
atio->u.isp24.fcp_cmnd.rddata,
atio->u.isp24.fcp_cmnd.wrdata,
atio->u.isp24.fcp_cmnd.add_cdb_len,
be32_to_cpu(get_unaligned((uint32_t *)
&atio->u.isp24.fcp_cmnd.add_cdb[
atio->u.isp24.fcp_cmnd.add_cdb_len])),
atio->u.isp24.fcp_hdr.s_id[0],
atio->u.isp24.fcp_hdr.s_id[1],
atio->u.isp24.fcp_hdr.s_id[2]);
if (unlikely(atio->u.isp24.exchange_addr ==
ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
ql_dbg(ql_dbg_tgt, vha, 0xe058,
"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_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 = ha->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;
}
ql_dbg(ql_dbg_tgt, vha, 0xe02f,
"qla_target(%d): response pkt %p: T %02x C %02x S %02x "
"handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
pkt->entry_count, pkt->entry_status, pkt->handle);
/*
* 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_TYPE7:
{
struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
vha->vp_idx);
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;
ql_dbg(ql_dbg_tgt, vha, 0xe031,
"ACCEPT_TGT_IO instance %d status %04x "
"lun %04x read/write %d data_length %04x "
"target_id %02x rx_id %04x\n ", vha->vp_idx,
le16_to_cpu(atio->u.isp2x.status),
le16_to_cpu(atio->u.isp2x.lun),
atio->u.isp2x.execution_codes,
le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
atio), atio->u.isp2x.rx_id);
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;
}
ql_dbg(ql_dbg_tgt, vha, 0xe032,
"FCP CDB: 0x%02x, sizeof(cdb): %lu",
atio->u.isp2x.cdb[0], (unsigned long
int)sizeof(atio->u.isp2x.cdb));
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;
ql_dbg(ql_dbg_tgt, vha, 0xe033,
"CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
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;
ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
vha->vp_idx);
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 = ha->tgt.qla_tgt;
int login_code;
ql_dbg(ql_dbg_tgt, vha, 0xe039,
"scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
ha->operating_mode, ha->current_topology);
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 "
"occured", 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 occured "
"(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 occured "
"(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 "
"occured: 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:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
"qla_target(%d): Async event %#x occured: "
"ignore (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;
}
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;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
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_hw_data *ha = vha->hw;
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(&ha->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(&ha->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(&ha->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(&ha->tgt.tgt_mutex);
sess = qlt_make_local_sess(vha, s_id);
/* sess has got an extra creation ref */
mutex_unlock(&ha->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;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
ha->tgt.tgt_ops->put_sess(sess);
return;
out_term:
qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (sess)
ha->tgt.tgt_ops->put_sess(sess);
}
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(&ha->tgt.tgt_mutex);
sess = qlt_make_local_sess(vha, s_id);
/* sess has got an extra creation ref */
mutex_unlock(&ha->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;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
ha->tgt.tgt_ops->put_sess(sess);
return;
out_term:
qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (sess)
ha->tgt.tgt_ops->put_sess(sess);
}
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;
ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
"Registering target for host %ld(%p)", base_vha->host_no, ha);
BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != 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);
ha->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;
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 (!ha->tgt.qla_tgt)
return 0;
mutex_lock(&qla_tgt_mutex);
list_del(&ha->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(ha->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(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
{
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 (ha->tgt.tgt_ops != NULL)
continue;
if (!(host->hostt->supported_mode & MODE_TARGET))
continue;
spin_lock_irqsave(&ha->hardware_lock, flags);
if (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;
}
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, wwpn, b);
if (memcmp(vha->port_name, b, WWN_SIZE)) {
scsi_host_put(host);
continue;
}
/*
* Setup passed parameters ahead of invoking callback
*/
ha->tgt.tgt_ops = qla_tgt_ops;
ha->tgt.target_lport_ptr = target_lport_ptr;
rc = (*callback)(vha);
if (rc != 0) {
ha->tgt.tgt_ops = NULL;
ha->tgt.target_lport_ptr = NULL;
}
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
*/
ha->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 */
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 */
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 = ha->tgt.qla_tgt;
unsigned long flags;
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);
set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
qla2xxx_wake_dpc(vha);
qla2x00_wait_for_hba_online(vha);
}
EXPORT_SYMBOL(qlt_enable_vha);
/*
* qla_tgt_disable_vha - NO LOCK HELD
*
* Disable Target Mode and reset the adapter
*/
void
qlt_disable_vha(struct scsi_qla_host *vha)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = ha->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;
mutex_init(&ha->tgt.tgt_mutex);
mutex_init(&ha->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;
}
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 device_reg_24xx __iomem *reg = &ha->iobase->isp24;
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(&reg->atio_q_out, ha->tgt.atio_ring_index);
}
void
qlt_24xx_config_rings(struct scsi_qla_host *vha, device_reg_t __iomem *reg)
{
struct qla_hw_data *ha = vha->hw;
/* FIXME: atio_q in/out for ha->mqenable=1..? */
if (ha->mqenable) {
#if 0
WRT_REG_DWORD(&reg->isp25mq.atio_q_in, 0);
WRT_REG_DWORD(&reg->isp25mq.atio_q_out, 0);
RD_REG_DWORD(&reg->isp25mq.atio_q_out);
#endif
} else {
/* Setup APTIO registers for target mode */
WRT_REG_DWORD(&reg->isp24.atio_q_in, 0);
WRT_REG_DWORD(&reg->isp24.atio_q_out, 0);
RD_REG_DWORD(&reg->isp24.atio_q_out);
}
}
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);
/* Enable FC tapes support */
nv->firmware_options_2 |= __constant_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);
}
}
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:
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;
mutex_init(&ha->tgt.tgt_mutex);
mutex_init(&ha->tgt.tgt_host_action_mutex);
qlt_clear_mode(base_vha);
}
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_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
NULL);
if (!qla_tgt_cmd_cachep) {
ql_log(ql_log_fatal, NULL, 0xe06c,
"kmem_cache_create for qla_tgt_cmd_cachep failed\n");
return -ENOMEM;
}
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");
ret = -ENOMEM;
goto out;
}
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);
out:
kmem_cache_destroy(qla_tgt_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);
kmem_cache_destroy(qla_tgt_cmd_cachep);
}
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