blob: ca39deb4ff5ba3d141b301283289a5ed8250a17d [file] [log] [blame]
/*
* qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
*
* based on qla2x00t.c code:
*
* Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
* Copyright (C) 2004 - 2005 Leonid Stoljar
* Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
* Copyright (C) 2006 - 2010 ID7 Ltd.
*
* Forward port and refactoring to modern qla2xxx and target/configfs
*
* Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2
* of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/workqueue.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
#include "qla_def.h"
#include "qla_target.h"
static int ql2xtgt_tape_enable;
module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xtgt_tape_enable,
"Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
module_param(qlini_mode, charp, S_IRUGO);
MODULE_PARM_DESC(qlini_mode,
"Determines when initiator mode will be enabled. Possible values: "
"\"exclusive\" - initiator mode will be enabled on load, "
"disabled on enabling target mode and then on disabling target mode "
"enabled back; "
"\"disabled\" - initiator mode will never be enabled; "
"\"enabled\" (default) - initiator mode will always stay enabled.");
int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
static int temp_sam_status = SAM_STAT_BUSY;
/*
* From scsi/fc/fc_fcp.h
*/
enum fcp_resp_rsp_codes {
FCP_TMF_CMPL = 0,
FCP_DATA_LEN_INVALID = 1,
FCP_CMND_FIELDS_INVALID = 2,
FCP_DATA_PARAM_MISMATCH = 3,
FCP_TMF_REJECTED = 4,
FCP_TMF_FAILED = 5,
FCP_TMF_INVALID_LUN = 9,
};
/*
* fc_pri_ta from scsi/fc/fc_fcp.h
*/
#define FCP_PTA_SIMPLE 0 /* simple task attribute */
#define FCP_PTA_HEADQ 1 /* head of queue task attribute */
#define FCP_PTA_ORDERED 2 /* ordered task attribute */
#define FCP_PTA_ACA 4 /* auto. contingent allegiance */
#define FCP_PTA_MASK 7 /* mask for task attribute field */
#define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */
#define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */
/*
* This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
* must be called under HW lock and could unlock/lock it inside.
* It isn't an issue, since in the current implementation on the time when
* those functions are called:
*
* - Either context is IRQ and only IRQ handler can modify HW data,
* including rings related fields,
*
* - Or access to target mode variables from struct qla_tgt doesn't
* cross those functions boundaries, except tgt_stop, which
* additionally protected by irq_cmd_count.
*/
/* Predefs for callbacks handed to qla2xxx LLD */
static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
struct atio_from_isp *pkt, uint8_t);
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, int ul_abort);
static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
struct qla_tgt_srr_imm *imm, int ha_lock);
static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
struct qla_tgt_cmd *cmd);
static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
struct atio_from_isp *atio, uint16_t status, int qfull);
static void qlt_disable_vha(struct scsi_qla_host *vha);
static void qlt_clear_tgt_db(struct qla_tgt *tgt);
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);
static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
struct imm_ntfy_from_isp *imm, int ha_locked);
/*
* Global Variables
*/
static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
static struct kmem_cache *qla_tgt_plogi_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);
/* This API intentionally takes dest as a parameter, rather than returning
* int value to avoid caller forgetting to issue wmb() after the store */
void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
{
scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
*dest = atomic_inc_return(&base_vha->generation_tick);
/* memory barrier */
wmb();
}
/* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
static struct qla_tgt_sess *qlt_find_sess_by_port_name(
struct qla_tgt *tgt,
const uint8_t *port_name)
{
struct qla_tgt_sess *sess;
list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
if (!memcmp(sess->port_name, port_name, WWN_SIZE))
return sess;
}
return NULL;
}
/* Might release hw lock, then reaquire!! */
static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
{
/* Send marker if required */
if (unlikely(vha->marker_needed != 0)) {
int rc = qla2x00_issue_marker(vha, vha_locked);
if (rc != QLA_SUCCESS) {
ql_dbg(ql_dbg_tgt, vha, 0xe03d,
"qla_target(%d): issue_marker() failed\n",
vha->vp_idx);
}
return rc;
}
return QLA_SUCCESS;
}
static inline
struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
uint8_t *d_id)
{
struct qla_hw_data *ha = vha->hw;
uint8_t vp_idx;
if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
return NULL;
if (vha->d_id.b.al_pa == d_id[2])
return vha;
BUG_ON(ha->tgt.tgt_vp_map == NULL);
vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
if (likely(test_bit(vp_idx, ha->vp_idx_map)))
return ha->tgt.tgt_vp_map[vp_idx].vha;
return NULL;
}
static inline
struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
uint16_t vp_idx)
{
struct qla_hw_data *ha = vha->hw;
if (vha->vp_idx == vp_idx)
return vha;
BUG_ON(ha->tgt.tgt_vp_map == NULL);
if (likely(test_bit(vp_idx, ha->vp_idx_map)))
return ha->tgt.tgt_vp_map[vp_idx].vha;
return NULL;
}
static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
{
unsigned long flags;
spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
vha->hw->tgt.num_pend_cmds++;
if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
vha->hw->qla_stats.stat_max_pend_cmds =
vha->hw->tgt.num_pend_cmds;
spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
}
static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
{
unsigned long flags;
spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
vha->hw->tgt.num_pend_cmds--;
spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
}
static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
struct atio_from_isp *atio, uint8_t ha_locked)
{
ql_dbg(ql_dbg_tgt, vha, 0xe072,
"%s: qla_target(%d): type %x ox_id %04x\n",
__func__, vha->vp_idx, atio->u.raw.entry_type,
be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
switch (atio->u.raw.entry_type) {
case ATIO_TYPE7:
{
struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
atio->u.isp24.fcp_hdr.d_id);
if (unlikely(NULL == host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe03e,
"qla_target(%d): Received ATIO_TYPE7 "
"with unknown d_id %x:%x:%x\n", vha->vp_idx,
atio->u.isp24.fcp_hdr.d_id[0],
atio->u.isp24.fcp_hdr.d_id[1],
atio->u.isp24.fcp_hdr.d_id[2]);
break;
}
qlt_24xx_atio_pkt(host, atio, ha_locked);
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, ha_locked);
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 false;
}
void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
{
switch (pkt->entry_type) {
case CTIO_CRC2:
ql_dbg(ql_dbg_tgt, vha, 0xe073,
"qla_target(%d):%s: CRC2 Response pkt\n",
vha->vp_idx, __func__);
case CTIO_TYPE7:
{
struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
entry->vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe041,
"qla_target(%d): Response pkt (CTIO_TYPE7) "
"received, with unknown vp_index %d\n",
vha->vp_idx, entry->vp_index);
break;
}
qlt_response_pkt(host, pkt);
break;
}
case IMMED_NOTIFY_TYPE:
{
struct scsi_qla_host *host = vha;
struct imm_ntfy_from_isp *entry =
(struct imm_ntfy_from_isp *)pkt;
host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe042,
"qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
"received, with unknown vp_index %d\n",
vha->vp_idx, entry->u.isp24.vp_index);
break;
}
qlt_response_pkt(host, pkt);
break;
}
case NOTIFY_ACK_TYPE:
{
struct scsi_qla_host *host = vha;
struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
if (0xFF != entry->u.isp24.vp_index) {
host = qlt_find_host_by_vp_idx(vha,
entry->u.isp24.vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe043,
"qla_target(%d): Response "
"pkt (NOTIFY_ACK_TYPE) "
"received, with unknown "
"vp_index %d\n", vha->vp_idx,
entry->u.isp24.vp_index);
break;
}
}
qlt_response_pkt(host, pkt);
break;
}
case ABTS_RECV_24XX:
{
struct abts_recv_from_24xx *entry =
(struct abts_recv_from_24xx *)pkt;
struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
entry->vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe044,
"qla_target(%d): Response pkt "
"(ABTS_RECV_24XX) received, with unknown "
"vp_index %d\n", vha->vp_idx, entry->vp_index);
break;
}
qlt_response_pkt(host, pkt);
break;
}
case ABTS_RESP_24XX:
{
struct abts_resp_to_24xx *entry =
(struct abts_resp_to_24xx *)pkt;
struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
entry->vp_index);
if (unlikely(!host)) {
ql_dbg(ql_dbg_tgt, vha, 0xe045,
"qla_target(%d): Response pkt "
"(ABTS_RECV_24XX) received, with unknown "
"vp_index %d\n", vha->vp_idx, entry->vp_index);
break;
}
qlt_response_pkt(host, pkt);
break;
}
default:
qlt_response_pkt(vha, pkt);
break;
}
}
/*
* All qlt_plogi_ack_t operations are protected by hardware_lock
*/
/*
* This is a zero-base ref-counting solution, since hardware_lock
* guarantees that ref_count is not modified concurrently.
* Upon successful return content of iocb is undefined
*/
static qlt_plogi_ack_t *
qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
struct imm_ntfy_from_isp *iocb)
{
qlt_plogi_ack_t *pla;
list_for_each_entry(pla, &vha->plogi_ack_list, list) {
if (pla->id.b24 == id->b24) {
qlt_send_term_imm_notif(vha, &pla->iocb, 1);
pla->iocb = *iocb;
return pla;
}
}
pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
if (!pla) {
ql_dbg(ql_dbg_async, vha, 0x5088,
"qla_target(%d): Allocation of plogi_ack failed\n",
vha->vp_idx);
return NULL;
}
pla->iocb = *iocb;
pla->id = *id;
list_add_tail(&pla->list, &vha->plogi_ack_list);
return pla;
}
static void qlt_plogi_ack_unref(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla)
{
BUG_ON(!pla->ref_count);
pla->ref_count--;
if (pla->ref_count)
return;
ql_dbg(ql_dbg_async, vha, 0x5089,
"Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
" exch %#x ox_id %#x\n", pla->iocb.u.isp24.port_name,
pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1],
pla->iocb.u.isp24.port_id[0],
le16_to_cpu(pla->iocb.u.isp24.nport_handle),
pla->iocb.u.isp24.exchange_address, pla->iocb.ox_id);
qlt_send_notify_ack(vha, &pla->iocb, 0, 0, 0, 0, 0, 0);
list_del(&pla->list);
kmem_cache_free(qla_tgt_plogi_cachep, pla);
}
static void
qlt_plogi_ack_link(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla,
struct qla_tgt_sess *sess, qlt_plogi_link_t link)
{
/* Inc ref_count first because link might already be pointing at pla */
pla->ref_count++;
if (sess->plogi_link[link])
qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
"Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
" s_id %02x:%02x:%02x, ref=%d\n", sess, link, sess->port_name,
pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2],
pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0],
pla->ref_count);
sess->plogi_link[link] = pla;
}
typedef struct {
/* These fields must be initialized by the caller */
port_id_t id;
/*
* number of cmds dropped while we were waiting for
* initiator to ack LOGO initialize to 1 if LOGO is
* triggered by a command, otherwise, to 0
*/
int cmd_count;
/* These fields are used by callee */
struct list_head list;
} qlt_port_logo_t;
static void
qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
{
qlt_port_logo_t *tmp;
int res;
mutex_lock(&vha->vha_tgt.tgt_mutex);
list_for_each_entry(tmp, &vha->logo_list, list) {
if (tmp->id.b24 == logo->id.b24) {
tmp->cmd_count += logo->cmd_count;
mutex_unlock(&vha->vha_tgt.tgt_mutex);
return;
}
}
list_add_tail(&logo->list, &vha->logo_list);
mutex_unlock(&vha->vha_tgt.tgt_mutex);
res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
mutex_lock(&vha->vha_tgt.tgt_mutex);
list_del(&logo->list);
mutex_unlock(&vha->vha_tgt.tgt_mutex);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
"Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
logo->cmd_count, res);
}
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;
unsigned long flags;
bool logout_started = false;
fc_port_t fcport;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
"%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
" s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
__func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
sess->logout_on_delete, sess->keep_nport_handle,
sess->send_els_logo);
BUG_ON(!tgt);
if (sess->send_els_logo) {
qlt_port_logo_t logo;
logo.id = sess->s_id;
logo.cmd_count = 0;
qlt_send_first_logo(vha, &logo);
}
if (sess->logout_on_delete) {
int rc;
memset(&fcport, 0, sizeof(fcport));
fcport.loop_id = sess->loop_id;
fcport.d_id = sess->s_id;
memcpy(fcport.port_name, sess->port_name, WWN_SIZE);
fcport.vha = vha;
fcport.tgt_session = sess;
rc = qla2x00_post_async_logout_work(vha, &fcport, NULL);
if (rc != QLA_SUCCESS)
ql_log(ql_log_warn, vha, 0xf085,
"Schedule logo failed sess %p rc %d\n",
sess, rc);
else
logout_started = true;
}
/*
* Release the target session for FC Nexus from fabric module code.
*/
if (sess->se_sess != NULL)
ha->tgt.tgt_ops->free_session(sess);
if (logout_started) {
bool traced = false;
while (!ACCESS_ONCE(sess->logout_completed)) {
if (!traced) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
"%s: waiting for sess %p logout\n",
__func__, sess);
traced = true;
}
msleep(100);
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
"%s: sess %p logout completed\n",
__func__, sess);
}
spin_lock_irqsave(&ha->hardware_lock, flags);
{
qlt_plogi_ack_t *own =
sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
qlt_plogi_ack_t *con =
sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
if (con) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
"se_sess %p / sess %p port %8phC is gone,"
" %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
sess->se_sess, sess, sess->port_name,
own ? "releasing own PLOGI" :
"no own PLOGI pending",
own ? own->ref_count : -1,
con->iocb.u.isp24.port_name, con->ref_count);
qlt_plogi_ack_unref(vha, con);
} else {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
"se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
sess->se_sess, sess, sess->port_name,
own ? "releasing own PLOGI" :
"no own PLOGI pending",
own ? own->ref_count : -1);
}
if (own)
qlt_plogi_ack_unref(vha, own);
}
list_del(&sess->sess_list_entry);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
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->tgt.sess_lock supposed to be held on entry */
static void qlt_release_session(struct kref *kref)
{
struct qla_tgt_sess *sess =
container_of(kref, struct qla_tgt_sess, sess_kref);
struct scsi_qla_host *vha = sess->vha;
if (sess->se_sess)
vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
if (!list_empty(&sess->del_list_entry))
list_del_init(&sess->del_list_entry);
sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
INIT_WORK(&sess->free_work, qlt_free_session_done);
schedule_work(&sess->free_work);
}
void qlt_put_sess(struct qla_tgt_sess *sess)
{
if (!sess)
return;
assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
kref_put(&sess->sess_kref, qlt_release_session);
}
EXPORT_SYMBOL(qlt_put_sess);
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;
unsigned long flags;
loop_id = le16_to_cpu(n->u.isp24.nport_handle);
if (loop_id == 0xFFFF) {
/* Global event */
atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
#if 0 /* FIXME: do we need to choose a session here? */
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 {
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
}
ql_dbg(ql_dbg_tgt, vha, 0xe000,
"Using sess for qla_tgt_reset: %p\n", sess);
if (!sess) {
res = -ESRCH;
return res;
}
ql_dbg(ql_dbg_tgt, vha, 0xe047,
"scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
"loop_id %d)\n", vha->host_no, sess, sess->port_name,
mcmd, loop_id);
lun = a->u.isp24.fcp_cmnd.lun;
unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
iocb, QLA24XX_MGMT_SEND_NACK);
}
/* ha->tgt.sess_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) {
/* Upgrade to unconditional deletion in case it was temporary */
if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
list_del(&sess->del_list_entry);
else
return;
}
ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
"Scheduling sess %p for deletion\n", sess);
if (immediate) {
dev_loss_tmo = 0;
sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
list_add(&sess->del_list_entry, &tgt->del_sess_list);
} else {
sess->deleted = QLA_SESS_DELETION_PENDING;
list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
}
sess->expires = jiffies + dev_loss_tmo * HZ;
ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
"qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
" scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
sess->vha->vp_idx, sess->port_name, sess->loop_id,
sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
sess->generation);
if (immediate)
mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
else
schedule_delayed_work(&tgt->sess_del_work,
sess->expires - jiffies);
}
/* ha->tgt.sess_lock supposed to be held on entry */
static void qlt_clear_tgt_db(struct qla_tgt *tgt)
{
struct qla_tgt_sess *sess;
list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
qlt_schedule_sess_for_deletion(sess, true);
/* At this point tgt could be already dead */
}
static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
uint16_t *loop_id)
{
struct qla_hw_data *ha = vha->hw;
dma_addr_t gid_list_dma;
struct gid_list_info *gid_list;
char *id_iter;
int res, rc, i;
uint16_t entries;
gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
&gid_list_dma, GFP_KERNEL);
if (!gid_list) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
"qla_target(%d): DMA Alloc failed of %u\n",
vha->vp_idx, qla2x00_gid_list_size(ha));
return -ENOMEM;
}
/* Get list of logged in devices */
rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
if (rc != QLA_SUCCESS) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
"qla_target(%d): get_id_list() failed: %x\n",
vha->vp_idx, rc);
res = -EBUSY;
goto out_free_id_list;
}
id_iter = (char *)gid_list;
res = -ENOENT;
for (i = 0; i < entries; i++) {
struct gid_list_info *gid = (struct gid_list_info *)id_iter;
if ((gid->al_pa == s_id[2]) &&
(gid->area == s_id[1]) &&
(gid->domain == s_id[0])) {
*loop_id = le16_to_cpu(gid->loop_id);
res = 0;
break;
}
id_iter += ha->gid_list_info_size;
}
out_free_id_list:
dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
gid_list, gid_list_dma);
return res;
}
/* ha->tgt.sess_lock supposed to be held on entry */
static void qlt_undelete_sess(struct qla_tgt_sess *sess)
{
BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
list_del_init(&sess->del_list_entry);
sess->deleted = 0;
}
static void qlt_del_sess_work_fn(struct delayed_work *work)
{
struct qla_tgt *tgt = container_of(work, struct qla_tgt,
sess_del_work);
struct scsi_qla_host *vha = tgt->vha;
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess;
unsigned long flags, elapsed;
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
while (!list_empty(&tgt->del_sess_list)) {
sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
del_list_entry);
elapsed = jiffies;
if (time_after_eq(elapsed, sess->expires)) {
/* No turning back */
list_del_init(&sess->del_list_entry);
sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
"Timeout: sess %p about to be deleted\n",
sess);
if (sess->se_sess)
ha->tgt.tgt_ops->shutdown_sess(sess);
qlt_put_sess(sess);
} else {
schedule_delayed_work(&tgt->sess_del_work,
sess->expires - elapsed);
break;
}
}
spin_unlock_irqrestore(&ha->tgt.sess_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;
/* Check to avoid double sessions */
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
sess_list_entry) {
if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
"Double sess %p found (s_id %x:%x:%x, "
"loop_id %d), updating to d_id %x:%x:%x, "
"loop_id %d", sess, sess->s_id.b.domain,
sess->s_id.b.al_pa, sess->s_id.b.area,
sess->loop_id, fcport->d_id.b.domain,
fcport->d_id.b.al_pa, fcport->d_id.b.area,
fcport->loop_id);
/* Cannot undelete at this point */
if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
spin_unlock_irqrestore(&ha->tgt.sess_lock,
flags);
return NULL;
}
if (sess->deleted)
qlt_undelete_sess(sess);
if (!sess->se_sess) {
if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
&sess->port_name[0], sess) < 0) {
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
return NULL;
}
}
kref_get(&sess->sess_kref);
ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
(fcport->flags & FCF_CONF_COMP_SUPPORTED));
if (sess->local && !local)
sess->local = 0;
qlt_do_generation_tick(vha, &sess->generation);
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
return sess;
}
}
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
sess = kzalloc(sizeof(*sess), GFP_KERNEL);
if (!sess) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
"qla_target(%u): session allocation failed, all commands "
"from port %8phC will be refused", vha->vp_idx,
fcport->port_name);
return NULL;
}
sess->tgt = vha->vha_tgt.qla_tgt;
sess->vha = vha;
sess->s_id = fcport->d_id;
sess->loop_id = fcport->loop_id;
sess->local = local;
kref_init(&sess->sess_kref);
INIT_LIST_HEAD(&sess->del_list_entry);
/* Under normal circumstances we want to logout from firmware when
* session eventually ends and release corresponding nport handle.
* In the exception cases (e.g. when new PLOGI is waiting) corresponding
* code will adjust these flags as necessary. */
sess->logout_on_delete = 1;
sess->keep_nport_handle = 0;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
"Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
sess, vha->vha_tgt.qla_tgt);
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->tgt.sess_lock, flags);
list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
vha->vha_tgt.qla_tgt->sess_count++;
qlt_do_generation_tick(vha, &sess->generation);
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
"qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
"s_id %x:%x:%x, confirmed completion %ssupported) added\n",
vha->vp_idx, local ? "local " : "", fcport->port_name,
fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
/*
* Determine if this fc_port->port_name is allowed to access
* target mode using explict NodeACLs+MappedLUNs, or using
* TPG demo mode. If this is successful a target mode FC nexus
* is created.
*/
if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
&fcport->port_name[0], sess) < 0) {
return NULL;
} else {
/*
* Take an extra reference to ->sess_kref here to handle qla_tgt_sess
* access across ->tgt.sess_lock reaquire.
*/
kref_get(&sess->sess_kref);
}
return sess;
}
/*
* Called from qla2x00_reg_remote_port()
*/
void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_sess *sess;
unsigned long flags;
if (!vha->hw->tgt.tgt_ops)
return;
if (!tgt || (fcport->port_type != FCT_INITIATOR))
return;
if (qla_ini_mode_enabled(vha))
return;
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
if (tgt->tgt_stop) {
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
return;
}
sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
if (!sess) {
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
mutex_lock(&vha->vha_tgt.tgt_mutex);
sess = qlt_create_sess(vha, fcport, false);
mutex_unlock(&vha->vha_tgt.tgt_mutex);
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
} else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
/* Point of no return */
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
return;
} else {
kref_get(&sess->sess_kref);
if (sess->deleted) {
qlt_undelete_sess(sess);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
"qla_target(%u): %ssession for port %8phC "
"(loop ID %d) reappeared\n", vha->vp_idx,
sess->local ? "local " : "", sess->port_name,
sess->loop_id);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
"Reappeared sess %p\n", sess);
}
ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
(fcport->flags & FCF_CONF_COMP_SUPPORTED));
}
if (sess && sess->local) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
"qla_target(%u): local session for "
"port %8phC (loop ID %d) became global\n", vha->vp_idx,
fcport->port_name, sess->loop_id);
sess->local = 0;
}
qlt_put_sess(sess);
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
}
/*
* max_gen - specifies maximum session generation
* at which this deletion requestion is still valid
*/
void
qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
{
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_sess *sess;
unsigned long flags;
if (!vha->hw->tgt.tgt_ops)
return;
if (!tgt)
return;
spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
if (tgt->tgt_stop) {
spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
return;
}
sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
if (!sess) {
spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
return;
}
if (max_gen - sess->generation < 0) {
spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
"Ignoring stale deletion request for se_sess %p / sess %p"
" for port %8phC, req_gen %d, sess_gen %d\n",
sess->se_sess, sess, sess->port_name, max_gen,
sess->generation);
return;
}
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(&vha->hw->tgt.sess_lock, flags);
}
static inline int test_tgt_sess_count(struct qla_tgt *tgt)
{
struct qla_hw_data *ha = tgt->ha;
unsigned long flags;
int res;
/*
* We need to protect against race, when tgt is freed before or
* inside wake_up()
*/
spin_lock_irqsave(&ha->hardware_lock, flags);
ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
"tgt %p, empty(sess_list)=%d sess_count=%d\n",
tgt, list_empty(&tgt->sess_list), tgt->sess_count);
res = (tgt->sess_count == 0);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return res;
}
/* Called by tcm_qla2xxx configfs code */
int qlt_stop_phase1(struct qla_tgt *tgt)
{
struct scsi_qla_host *vha = tgt->vha;
struct qla_hw_data *ha = tgt->ha;
unsigned long flags;
mutex_lock(&qla_tgt_mutex);
if (!vha->fc_vport) {
struct Scsi_Host *sh = vha->host;
struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
bool npiv_vports;
spin_lock_irqsave(sh->host_lock, flags);
npiv_vports = (fc_host->npiv_vports_inuse);
spin_unlock_irqrestore(sh->host_lock, flags);
if (npiv_vports) {
mutex_unlock(&qla_tgt_mutex);
return -EPERM;
}
}
if (tgt->tgt_stop || tgt->tgt_stopped) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
"Already in tgt->tgt_stop or tgt_stopped state\n");
mutex_unlock(&qla_tgt_mutex);
return -EPERM;
}
ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
vha->host_no, vha);
/*
* Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
* Lock is needed, because we still can get an incoming packet.
*/
mutex_lock(&vha->vha_tgt.tgt_mutex);
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
tgt->tgt_stop = 1;
qlt_clear_tgt_db(tgt);
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
mutex_unlock(&vha->vha_tgt.tgt_mutex);
mutex_unlock(&qla_tgt_mutex);
flush_delayed_work(&tgt->sess_del_work);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
"Waiting for sess works (tgt %p)", tgt);
spin_lock_irqsave(&tgt->sess_work_lock, flags);
while (!list_empty(&tgt->sess_works_list)) {
spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
flush_scheduled_work();
spin_lock_irqsave(&tgt->sess_work_lock, flags);
}
spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
"Waiting for tgt %p: list_empty(sess_list)=%d "
"sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
tgt->sess_count);
wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
/* Big hammer */
if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
qlt_disable_vha(vha);
/* Wait for sessions to clear out (just in case) */
wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
return 0;
}
EXPORT_SYMBOL(qlt_stop_phase1);
/* Called by tcm_qla2xxx configfs code */
void qlt_stop_phase2(struct qla_tgt *tgt)
{
struct qla_hw_data *ha = tgt->ha;
scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
unsigned long flags;
if (tgt->tgt_stopped) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
"Already in tgt->tgt_stopped state\n");
dump_stack();
return;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
"Waiting for %d IRQ commands to complete (tgt %p)",
tgt->irq_cmd_count, tgt);
mutex_lock(&vha->vha_tgt.tgt_mutex);
spin_lock_irqsave(&ha->hardware_lock, flags);
while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
spin_unlock_irqrestore(&ha->hardware_lock, flags);
udelay(2);
spin_lock_irqsave(&ha->hardware_lock, flags);
}
tgt->tgt_stop = 0;
tgt->tgt_stopped = 1;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
mutex_unlock(&vha->vha_tgt.tgt_mutex);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
tgt);
}
EXPORT_SYMBOL(qlt_stop_phase2);
/* Called from qlt_remove_target() -> qla2x00_remove_one() */
static void qlt_release(struct qla_tgt *tgt)
{
scsi_qla_host_t *vha = tgt->vha;
if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
qlt_stop_phase2(tgt);
vha->vha_tgt.qla_tgt = NULL;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
"Release of tgt %p finished\n", tgt);
kfree(tgt);
}
/* ha->hardware_lock supposed to be held on entry */
static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
const void *param, unsigned int param_size)
{
struct qla_tgt_sess_work_param *prm;
unsigned long flags;
prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
if (!prm) {
ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
"qla_target(%d): Unable to create session "
"work, command will be refused", 0);
return -ENOMEM;
}
ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
"Scheduling work (type %d, prm %p)"
" to find session for param %p (size %d, tgt %p)\n",
type, prm, param, param_size, tgt);
prm->type = type;
memcpy(&prm->tm_iocb, param, param_size);
spin_lock_irqsave(&tgt->sess_work_lock, flags);
list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
schedule_work(&tgt->sess_work);
return 0;
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static void qlt_send_notify_ack(struct scsi_qla_host *vha,
struct imm_ntfy_from_isp *ntfy,
uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
{
struct qla_hw_data *ha = vha->hw;
request_t *pkt;
struct nack_to_isp *nack;
ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
/* Send marker if required */
if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
return;
pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
if (!pkt) {
ql_dbg(ql_dbg_tgt, vha, 0xe049,
"qla_target(%d): %s failed: unable to allocate "
"request packet\n", vha->vp_idx, __func__);
return;
}
if (vha->vha_tgt.qla_tgt != NULL)
vha->vha_tgt.qla_tgt->notify_ack_expected++;
pkt->entry_type = NOTIFY_ACK_TYPE;
pkt->entry_count = 1;
nack = (struct nack_to_isp *)pkt;
nack->ox_id = ntfy->ox_id;
nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
nack->u.isp24.flags = ntfy->u.isp24.flags &
cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
}
nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
nack->u.isp24.status = ntfy->u.isp24.status;
nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
nack->u.isp24.srr_reject_code = srr_reject_code;
nack->u.isp24.srr_reject_code_expl = srr_explan;
nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
ql_dbg(ql_dbg_tgt, vha, 0xe005,
"qla_target(%d): Sending 24xx Notify Ack %d\n",
vha->vp_idx, nack->u.isp24.status);
/* Memory Barrier */
wmb();
qla2x00_start_iocbs(vha, vha->req);
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
struct abts_recv_from_24xx *abts, uint32_t status,
bool ids_reversed)
{
struct qla_hw_data *ha = vha->hw;
struct abts_resp_to_24xx *resp;
uint32_t f_ctl;
uint8_t *p;
ql_dbg(ql_dbg_tgt, vha, 0xe006,
"Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
ha, abts, status);
/* Send marker if required */
if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
return;
resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
if (!resp) {
ql_dbg(ql_dbg_tgt, vha, 0xe04a,
"qla_target(%d): %s failed: unable to allocate "
"request packet", vha->vp_idx, __func__);
return;
}
resp->entry_type = ABTS_RESP_24XX;
resp->entry_count = 1;
resp->nport_handle = abts->nport_handle;
resp->vp_index = vha->vp_idx;
resp->sof_type = abts->sof_type;
resp->exchange_address = abts->exchange_address;
resp->fcp_hdr_le = abts->fcp_hdr_le;
f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
F_CTL_LAST_SEQ | F_CTL_END_SEQ |
F_CTL_SEQ_INITIATIVE);
p = (uint8_t *)&f_ctl;
resp->fcp_hdr_le.f_ctl[0] = *p++;
resp->fcp_hdr_le.f_ctl[1] = *p++;
resp->fcp_hdr_le.f_ctl[2] = *p;
if (ids_reversed) {
resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
} else {
resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
}
resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
if (status == FCP_TMF_CMPL) {
resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
resp->payload.ba_acct.low_seq_cnt = 0x0000;
resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
} else {
resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
resp->payload.ba_rjt.reason_code =
BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
/* Other bytes are zero */
}
vha->vha_tgt.qla_tgt->abts_resp_expected++;
/* Memory Barrier */
wmb();
qla2x00_start_iocbs(vha, vha->req);
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
struct abts_resp_from_24xx_fw *entry)
{
struct ctio7_to_24xx *ctio;
ql_dbg(ql_dbg_tgt, vha, 0xe007,
"Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
/* Send marker if required */
if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
return;
ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
if (ctio == NULL) {
ql_dbg(ql_dbg_tgt, vha, 0xe04b,
"qla_target(%d): %s failed: unable to allocate "
"request packet\n", vha->vp_idx, __func__);
return;
}
/*
* We've got on entrance firmware's response on by us generated
* ABTS response. So, in it ID fields are reversed.
*/
ctio->entry_type = CTIO_TYPE7;
ctio->entry_count = 1;
ctio->nport_handle = entry->nport_handle;
ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
ctio->timeout = 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 = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
CTIO7_FLAGS_TERMINATE);
ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
/* Memory Barrier */
wmb();
qla2x00_start_iocbs(vha, vha->req);
qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
FCP_TMF_CMPL, true);
}
static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
{
struct qla_tgt_sess_op *op;
struct qla_tgt_cmd *cmd;
spin_lock(&vha->cmd_list_lock);
list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
if (tag == op->atio.u.isp24.exchange_addr) {
op->aborted = true;
spin_unlock(&vha->cmd_list_lock);
return 1;
}
}
list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
if (tag == cmd->atio.u.isp24.exchange_addr) {
cmd->aborted = 1;
spin_unlock(&vha->cmd_list_lock);
return 1;
}
}
spin_unlock(&vha->cmd_list_lock);
return 0;
}
/* drop cmds for the given lun
* XXX only looks for cmds on the port through which lun reset was recieved
* XXX does not go through the list of other port (which may have cmds
* for the same lun)
*/
static void abort_cmds_for_lun(struct scsi_qla_host *vha,
uint32_t lun, uint8_t *s_id)
{
struct qla_tgt_sess_op *op;
struct qla_tgt_cmd *cmd;
uint32_t key;
key = sid_to_key(s_id);
spin_lock(&vha->cmd_list_lock);
list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
uint32_t op_key;
uint32_t op_lun;
op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
op_lun = scsilun_to_int(
(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
if (op_key == key && op_lun == lun)
op->aborted = true;
}
list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
uint32_t cmd_key;
uint32_t cmd_lun;
cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
cmd_lun = scsilun_to_int(
(struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
if (cmd_key == key && cmd_lun == lun)
cmd->aborted = 1;
}
spin_unlock(&vha->cmd_list_lock);
}
/* ha->hardware_lock supposed to be held on entry */
static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
{
struct qla_hw_data *ha = vha->hw;
struct se_session *se_sess = sess->se_sess;
struct qla_tgt_mgmt_cmd *mcmd;
struct se_cmd *se_cmd;
u32 lun = 0;
int rc;
bool found_lun = false;
spin_lock(&se_sess->sess_cmd_lock);
list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
struct qla_tgt_cmd *cmd =
container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
if (se_cmd->tag == abts->exchange_addr_to_abort) {
lun = cmd->unpacked_lun;
found_lun = true;
break;
}
}
spin_unlock(&se_sess->sess_cmd_lock);
/* cmd not in LIO lists, look in qla list */
if (!found_lun) {
if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
/* send TASK_ABORT response immediately */
qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
return 0;
} else {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
"unable to find cmd in driver or LIO for tag 0x%x\n",
abts->exchange_addr_to_abort);
return -ENOENT;
}
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
"qla_target(%d): task abort (tag=%d)\n",
vha->vp_idx, abts->exchange_addr_to_abort);
mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
if (mcmd == NULL) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
"qla_target(%d): %s: Allocation of ABORT cmd failed",
vha->vp_idx, __func__);
return -ENOMEM;
}
memset(mcmd, 0, sizeof(*mcmd));
mcmd->sess = sess;
memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
mcmd->reset_count = vha->hw->chip_reset;
rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
abts->exchange_addr_to_abort);
if (rc != 0) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
"qla_target(%d): tgt_ops->handle_tmr()"
" failed: %d", vha->vp_idx, rc);
mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
return -EFAULT;
}
return 0;
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
struct abts_recv_from_24xx *abts)
{
struct qla_hw_data *ha = vha->hw;
struct qla_tgt_sess *sess;
uint32_t tag = abts->exchange_addr_to_abort;
uint8_t s_id[3];
int rc;
unsigned long flags;
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];
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
if (!sess) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
"qla_target(%d): task abort for non-existant session\n",
vha->vp_idx);
rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
if (rc != 0) {
qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
false);
}
return;
}
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
return;
}
rc = __qlt_24xx_handle_abts(vha, abts, sess);
if (rc != 0) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
"qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
vha->vp_idx, rc);
qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
return;
}
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
{
struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
struct ctio7_to_24xx *ctio;
uint16_t temp;
ql_dbg(ql_dbg_tgt, ha, 0xe008,
"Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
ha, atio, resp_code);
/* Send marker if required */
if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
return;
ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
if (ctio == NULL) {
ql_dbg(ql_dbg_tgt, ha, 0xe04c,
"qla_target(%d): %s failed: unable to allocate "
"request packet\n", ha->vp_idx, __func__);
return;
}
ctio->entry_type = CTIO_TYPE7;
ctio->entry_count = 1;
ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
ctio->nport_handle = mcmd->sess->loop_id;
ctio->timeout = 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) |
cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
ctio->u.status1.ox_id = cpu_to_le16(temp);
ctio->u.status1.scsi_status =
cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
ctio->u.status1.response_len = cpu_to_le16(8);
ctio->u.status1.sense_data[0] = resp_code;
/* Memory Barrier */
wmb();
qla2x00_start_iocbs(ha, ha->req);
}
void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
{
mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
}
EXPORT_SYMBOL(qlt_free_mcmd);
/* callback from target fabric module code */
void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
{
struct scsi_qla_host *vha = mcmd->sess->vha;
struct qla_hw_data *ha = vha->hw;
unsigned long flags;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
"TM response mcmd (%p) status %#x state %#x",
mcmd, mcmd->fc_tm_rsp, mcmd->flags);
spin_lock_irqsave(&ha->hardware_lock, flags);
if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
/*
* Either the port is not online or this request was from
* previous life, just abort the processing.
*/
ql_dbg(ql_dbg_async, vha, 0xe100,
"RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
vha->flags.online, qla2x00_reset_active(vha),
mcmd->reset_count, ha->chip_reset);
ha->tgt.tgt_ops->free_mcmd(mcmd);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return;
}
if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
0, 0, 0, 0, 0, 0);
else {
if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
mcmd->fc_tm_rsp, false);
else
qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
mcmd->fc_tm_rsp);
}
/*
* Make the callback for ->free_mcmd() to queue_work() and invoke
* target_put_sess_cmd() to drop cmd_kref to 1. The final
* target_put_sess_cmd() call will be made from TFO->check_stop_free()
* -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
* descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
* qlt_xmit_tm_rsp() returns here..
*/
ha->tgt.tgt_ops->free_mcmd(mcmd);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
EXPORT_SYMBOL(qlt_xmit_tm_rsp);
/* No locks */
static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
{
struct qla_tgt_cmd *cmd = prm->cmd;
BUG_ON(cmd->sg_cnt == 0);
prm->sg = (struct scatterlist *)cmd->sg;
prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
cmd->sg_cnt, cmd->dma_data_direction);
if (unlikely(prm->seg_cnt == 0))
goto out_err;
prm->cmd->sg_mapped = 1;
if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
/*
* If greater than four sg entries then we need to allocate
* the continuation entries
*/
if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
prm->tgt->datasegs_per_cmd,
prm->tgt->datasegs_per_cont);
} else {
/* DIF */
if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
(cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
prm->tot_dsds = prm->seg_cnt;
} else
prm->tot_dsds = prm->seg_cnt;
if (cmd->prot_sg_cnt) {
prm->prot_sg = cmd->prot_sg;
prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
cmd->prot_sg, cmd->prot_sg_cnt,
cmd->dma_data_direction);
if (unlikely(prm->prot_seg_cnt == 0))
goto out_err;
if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
(cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
/* Dif Bundling not support here */
prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
cmd->blk_sz);
prm->tot_dsds += prm->prot_seg_cnt;
} else
prm->tot_dsds += prm->prot_seg_cnt;
}
}
return 0;
out_err:
ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
"qla_target(%d): PCI mapping failed: sg_cnt=%d",
0, prm->cmd->sg_cnt);
return -1;
}
static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
{
struct qla_hw_data *ha = vha->hw;
if (!cmd->sg_mapped)
return;
pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
cmd->sg_mapped = 0;
if (cmd->prot_sg_cnt)
pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
cmd->dma_data_direction);
if (cmd->ctx_dsd_alloced)
qla2x00_clean_dsd_pool(ha, NULL, cmd);
if (cmd->ctx)
dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
}
static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
uint32_t req_cnt)
{
uint32_t cnt, cnt_in;
if (vha->req->cnt < (req_cnt + 2)) {
cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
if (vha->req->ring_index < cnt)
vha->req->cnt = cnt - vha->req->ring_index;
else
vha->req->cnt = vha->req->length -
(vha->req->ring_index - cnt);
if (unlikely(vha->req->cnt < (req_cnt + 2))) {
ql_dbg(ql_dbg_io, vha, 0x305a,
"qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
vha->vp_idx, vha->req->ring_index,
vha->req->cnt, req_cnt, cnt, cnt_in,
vha->req->length);
return -EAGAIN;
}
}
vha->req->cnt -= req_cnt;
return 0;
}
/*
* ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
*/
static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
{
/* Adjust ring index. */
vha->req->ring_index++;
if (vha->req->ring_index == vha->req->length) {
vha->req->ring_index = 0;
vha->req->ring_ptr = vha->req->ring;
} else {
vha->req->ring_ptr++;
}
return (cont_entry_t *)vha->req->ring_ptr;
}
/* ha->hardware_lock supposed to be held on entry */
static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
{
struct qla_hw_data *ha = vha->hw;
uint32_t h;
h = ha->tgt.current_handle;
/* always increment cmd handle */
do {
++h;
if (h > DEFAULT_OUTSTANDING_COMMANDS)
h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
if (h == ha->tgt.current_handle) {
ql_dbg(ql_dbg_io, vha, 0x305b,
"qla_target(%d): Ran out of "
"empty cmd slots in ha %p\n", vha->vp_idx, ha);
h = QLA_TGT_NULL_HANDLE;
break;
}
} while ((h == QLA_TGT_NULL_HANDLE) ||
(h == QLA_TGT_SKIP_HANDLE) ||
(ha->tgt.cmds[h-1] != NULL));
if (h != QLA_TGT_NULL_HANDLE)
ha->tgt.current_handle = h;
return h;
}
/* ha->hardware_lock supposed to be held on entry */
static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
struct scsi_qla_host *vha)
{
uint32_t h;
struct ctio7_to_24xx *pkt;
struct qla_hw_data *ha = vha->hw;
struct atio_from_isp *atio = &prm->cmd->atio;
uint16_t temp;
pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
prm->pkt = pkt;
memset(pkt, 0, sizeof(*pkt));
pkt->entry_type = CTIO_TYPE7;
pkt->entry_count = (uint8_t)prm->req_cnt;
pkt->vp_index = vha->vp_idx;
h = qlt_make_handle(vha);
if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
/*
* CTIO type 7 from the firmware doesn't provide a way to
* know the initiator's LOOP ID, hence we can't find
* the session and, so, the command.
*/
return -EAGAIN;
} else
ha->tgt.cmds[h-1] = prm->cmd;
pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
pkt->nport_handle = prm->cmd->loop_id;
pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
pkt->exchange_addr = atio->u.isp24.exchange_addr;
pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
pkt->u.status0.ox_id = cpu_to_le16(temp);
pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
return 0;
}
/*
* ha->hardware_lock supposed to be held on entry. We have already made sure
* that there is sufficient amount of request entries to not drop it.
*/
static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
struct scsi_qla_host *vha)
{
int cnt;
uint32_t *dword_ptr;
int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
/* Build continuation packets */
while (prm->seg_cnt > 0) {
cont_a64_entry_t *cont_pkt64 =
(cont_a64_entry_t *)qlt_get_req_pkt(vha);
/*
* Make sure that from cont_pkt64 none of
* 64-bit specific fields used for 32-bit
* addressing. Cast to (cont_entry_t *) for
* that.
*/
memset(cont_pkt64, 0, sizeof(*cont_pkt64));
cont_pkt64->entry_count = 1;
cont_pkt64->sys_define = 0;
if (enable_64bit_addressing) {
cont_pkt64->entry_type = CONTINUE_A64_TYPE;
dword_ptr =
(uint32_t *)&cont_pkt64->dseg_0_address;
} else {
cont_pkt64->entry_type = CONTINUE_TYPE;
dword_ptr =
(uint32_t *)&((cont_entry_t *)
cont_pkt64)->dseg_0_address;
}
/* Load continuation entry data segments */
for (cnt = 0;
cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
cnt++, prm->seg_cnt--) {
*dword_ptr++ =
cpu_to_le32(pci_dma_lo32
(sg_dma_address(prm->sg)));
if (enable_64bit_addressing) {
*dword_ptr++ =
cpu_to_le32(pci_dma_hi32
(sg_dma_address
(prm->sg)));
}
*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
prm->sg = sg_next(prm->sg);
}
}
}
/*
* ha->hardware_lock supposed to be held on entry. We have already made sure
* that there is sufficient amount of request entries to not drop it.
*/
static void qlt_load_data_segments(struct qla_tgt_prm *prm,
struct scsi_qla_host *vha)
{
int cnt;
uint32_t *dword_ptr;
int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
/* Setup packet address segment pointer */
dword_ptr = pkt24->u.status0.dseg_0_address;
/* Set total data segment count */
if (prm->seg_cnt)
pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
if (prm->seg_cnt == 0) {
/* No data transfer */
*dword_ptr++ = 0;
*dword_ptr = 0;
return;
}
/* If scatter gather */
/* Load command entry data segments */
for (cnt = 0;
(cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
cnt++, prm->seg_cnt--) {
*dword_ptr++ =
cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
if (enable_64bit_addressing) {
*dword_ptr++ =
cpu_to_le32(pci_dma_hi32(
sg_dma_address(prm->sg)));
}
*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
prm->sg = sg_next(prm->sg);
}
qlt_load_cont_data_segments(prm, vha);
}
static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
{
return cmd->bufflen > 0;
}
/*
* Called without ha->hardware_lock held
*/
static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
uint32_t *full_req_cnt)
{
struct qla_tgt *tgt = cmd->tgt;
struct scsi_qla_host *vha = tgt->vha;
struct qla_hw_data *ha = vha->hw;
struct se_cmd *se_cmd = &cmd->se_cmd;
prm->cmd = cmd;
prm->tgt = tgt;
prm->rq_result = scsi_status;
prm->sense_buffer = &cmd->sense_buffer[0];
prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
prm->sg = NULL;
prm->seg_cnt = -1;
prm->req_cnt = 1;
prm->add_status_pkt = 0;
/* Send marker if required */
if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
return -EFAULT;
if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
if (qlt_pci_map_calc_cnt(prm) != 0)
return -EAGAIN;
}
*full_req_cnt = prm->req_cnt;
if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
prm->residual = se_cmd->residual_count;
ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
"Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
prm->residual, se_cmd->tag,
se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
cmd->bufflen, prm->rq_result);
prm->rq_result |= SS_RESIDUAL_UNDER;
} else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
prm->residual = se_cmd->residual_count;
ql_dbg(ql_dbg_io, vha, 0x305d,
"Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
prm->rq_result |= SS_RESIDUAL_OVER;
}
if (xmit_type & QLA_TGT_XMIT_STATUS) {
/*
* If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
* ignored in *xmit_response() below
*/
if (qlt_has_data(cmd)) {
if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
(IS_FWI2_CAPABLE(ha) &&
(prm->rq_result != 0))) {
prm->add_status_pkt = 1;
(*full_req_cnt)++;
}
}
}
return 0;
}
static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
struct qla_tgt_cmd *cmd, int sending_sense)
{
if (ha->tgt.enable_class_2)
return 0;
if (sending_sense)
return cmd->conf_compl_supported;
else
return ha->tgt.enable_explicit_conf &&
cmd->conf_compl_supported;
}
#ifdef CONFIG_QLA_TGT_DEBUG_SRR
/*
* Original taken from the XFS code
*/
static unsigned long qlt_srr_random(void)
{
static int Inited;
static unsigned long RandomValue;
static DEFINE_SPINLOCK(lock);
/* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
register long rv;
register long lo;
register long hi;
unsigned long flags;
spin_lock_irqsave(&lock, flags);
if (!Inited) {
RandomValue = jiffies;
Inited = 1;
}
rv = RandomValue;
hi = rv / 127773;
lo = rv % 127773;
rv = 16807 * lo - 2836 * hi;
if (rv <= 0)
rv += 2147483647;
RandomValue = rv;
spin_unlock_irqrestore(&lock, flags);
return rv;
}
static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
{
#if 0 /* This is not a real status packets lost, so it won't lead to SRR */
if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
== 50) {
*xmit_type &= ~QLA_TGT_XMIT_STATUS;
ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
"Dropping cmd %p (tag %d) status", cmd, se_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, se_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, se_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)", se_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 |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
ctio->u.status0.flags |= 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 |= cpu_to_le16(
CTIO7_FLAGS_EXPLICIT_CONFORM |
CTIO7_FLAGS_CONFORM_REQ);
}
skip_explict_conf:
ctio->u.status1.flags &=
~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
ctio->u.status1.flags |=
cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
ctio->u.status1.scsi_status |=
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 &=
~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
ctio->u.status1.flags |=
cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
ctio->u.status1.sense_length = 0;
memset(ctio->u.status1.sense_data, 0,
sizeof(ctio->u.status1.sense_data));
}
/* Sense with len > 24, is it possible ??? */
}
/* diff */
static inline int
qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
{
/*
* Uncomment when corresponding SCSI changes are done.
*
if (!sp->cmd->prot_chk)
return 0;
*
*/
switch (se_cmd->prot_op) {
case TARGET_PROT_DOUT_INSERT:
case TARGET_PROT_DIN_STRIP:
if (ql2xenablehba_err_chk >= 1)
return 1;
break;
case TARGET_PROT_DOUT_PASS:
case TARGET_PROT_DIN_PASS:
if (ql2xenablehba_err_chk >= 2)
return 1;
break;
case TARGET_PROT_DIN_INSERT:
case TARGET_PROT_DOUT_STRIP:
return 1;
default:
break;
}
return 0;
}
/*
* qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
*
*/
static inline void
qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
{
uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
/* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
* have been immplemented by TCM, before AppTag is avail.
* Look for modesense_handlers[]
*/
ctx->app_tag = 0;
ctx->app_tag_mask[0] = 0x0;
ctx->app_tag_mask[1] = 0x0;
switch (se_cmd->prot_type) {
case TARGET_DIF_TYPE0_PROT:
/*
* No check for ql2xenablehba_err_chk, as it would be an
* I/O error if hba tag generation is not done.
*/
ctx->ref_tag = cpu_to_le32(lba);
if (!qlt_hba_err_chk_enabled(se_cmd))
break;
/* enable ALL bytes of the ref tag */
ctx->ref_tag_mask[0] = 0xff;
ctx->ref_tag_mask[1] = 0xff;
ctx->ref_tag_mask[2] = 0xff;
ctx->ref_tag_mask[3] = 0xff;
break;
/*
* For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
* 16 bit app tag.
*/
case TARGET_DIF_TYPE1_PROT:
ctx->ref_tag = cpu_to_le32(lba);
if (!qlt_hba_err_chk_enabled(se_cmd))
break;
/* enable ALL bytes of the ref tag */
ctx->ref_tag_mask[0] = 0xff;
ctx->ref_tag_mask[1] = 0xff;
ctx->ref_tag_mask[2] = 0xff;
ctx->ref_tag_mask[3] = 0xff;
break;
/*
* For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
* match LBA in CDB + N
*/
case TARGET_DIF_TYPE2_PROT:
ctx->ref_tag = cpu_to_le32(lba);
if (!qlt_hba_err_chk_enabled(se_cmd))
break;
/* enable ALL bytes of the ref tag */
ctx->ref_tag_mask[0] = 0xff;
ctx->ref_tag_mask[1] = 0xff;
ctx->ref_tag_mask[2] = 0xff;
ctx->ref_tag_mask[3] = 0xff;
break;
/* For Type 3 protection: 16 bit GUARD only */
case TARGET_DIF_TYPE3_PROT:
ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
break;
}
}
static inline int
qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
{
uint32_t *cur_dsd;
uint32_t transfer_length = 0;
uint32_t data_bytes;
uint32_t dif_bytes;
uint8_t bundling = 1;
uint8_t *clr_ptr;
struct crc_context *crc_ctx_pkt = NULL;
struct qla_hw_data *ha;
struct ctio_crc2_to_fw *pkt;
dma_addr_t crc_ctx_dma;
uint16_t fw_prot_opts = 0;
struct qla_tgt_cmd *cmd = prm->cmd;
struct se_cmd *se_cmd = &cmd->se_cmd;
uint32_t h;
struct atio_from_isp *atio = &prm->cmd->atio;
uint16_t t16;
ha = vha->hw;
pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
prm->pkt = pkt;
memset(pkt, 0, sizeof(*pkt));
ql_dbg(ql_dbg_tgt, vha, 0xe071,
"qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
(se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
bundling = 0;
/* Compute dif len and adjust data len to incude protection */
data_bytes = cmd->bufflen;
dif_bytes = (data_bytes / cmd->blk_sz) * 8;
switch (se_cmd->prot_op) {
case TARGET_PROT_DIN_INSERT:
case TARGET_PROT_DOUT_STRIP:
transfer_length = data_bytes;
data_bytes += dif_bytes;
break;
case TARGET_PROT_DIN_STRIP:
case TARGET_PROT_DOUT_INSERT:
case TARGET_PROT_DIN_PASS:
case TARGET_PROT_DOUT_PASS:
transfer_length = data_bytes + dif_bytes;
break;
default:
BUG();
break;
}
if (!qlt_hba_err_chk_enabled(se_cmd))
fw_prot_opts |= 0x10; /* Disable Guard tag checking */
/* HBA error checking enabled */
else if (IS_PI_UNINIT_CAPABLE(ha)) {
if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
(se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
fw_prot_opts |= PO_DIS_VALD_APP_ESC;
else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
}
switch (se_cmd->prot_op) {
case TARGET_PROT_DIN_INSERT:
case TARGET_PROT_DOUT_INSERT:
fw_prot_opts |= PO_MODE_DIF_INSERT;
break;
case TARGET_PROT_DIN_STRIP:
case TARGET_PROT_DOUT_STRIP:
fw_prot_opts |= PO_MODE_DIF_REMOVE;
break;
case TARGET_PROT_DIN_PASS:
case TARGET_PROT_DOUT_PASS:
fw_prot_opts |= PO_MODE_DIF_PASS;
/* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
break;
default:/* Normal Request */
fw_prot_opts |= PO_MODE_DIF_PASS;
break;
}
/* ---- PKT ---- */
/* Update entry type to indicate Command Type CRC_2 IOCB */
pkt->entry_type = CTIO_CRC2;
pkt->entry_count = 1;
pkt->vp_index = vha->vp_idx;
h = qlt_make_handle(vha);
if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
/*
* CTIO type 7 from the firmware doesn't provide a way to
* know the initiator's LOOP ID, hence we can't find
* the session and, so, the command.
*/
return -EAGAIN;
} else
ha->tgt.cmds[h-1] = prm->cmd;
pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
pkt->nport_handle = prm->cmd->loop_id;
pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
pkt->exchange_addr = atio->u.isp24.exchange_addr;
/* silence compile warning */
t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
pkt->ox_id = cpu_to_le16(t16);
t16 = (atio->u.isp24.attr << 9);
pkt->flags |= cpu_to_le16(t16);
pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
/* Set transfer direction */
if (cmd->dma_data_direction == DMA_TO_DEVICE)
pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
pkt->dseg_count = prm->tot_dsds;
/* Fibre channel byte count */
pkt->transfer_length = cpu_to_le32(transfer_length);
/* ----- CRC context -------- */
/* Allocate CRC context from global pool */
crc_ctx_pkt = cmd->ctx =
dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
if (!crc_ctx_pkt)
goto crc_queuing_error;
/* Zero out CTX area. */
clr_ptr = (uint8_t *)crc_ctx_pkt;
memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
/* Set handle */
crc_ctx_pkt->handle = pkt->handle;
qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
if (!bundling) {
cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
} else {
/*
* Configure Bundling if we need to fetch interlaving
* protection PCI accesses
*/
fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
crc_ctx_pkt->u.bundling.