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qla2xxx: Remove SRR code

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During initial implementation, tape support was included but not
enabled by default on target. So far, we don't see any target
customer requesting this support. Since this code is not being
used actively, we want to remove it and we will add back if there
are any request in future for SRR support.

Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Himanshu Madhani 2017-01-19 22:27:56 -08:00 committed by Nicholas Bellinger
parent 1eb42f965c
commit 2c39b5ca2a
2 changed files with 0 additions and 662 deletions
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641
drivers/scsi/qla2xxx/qla_target.c
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@ -106,8 +106,6 @@ 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,
@ -2183,95 +2181,6 @@ static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
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)
{
@ -2686,7 +2595,6 @@ int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
spin_unlock_irqrestore(&ha->hardware_lock, flags);
memset(&prm, 0, sizeof(prm));
qlt_check_srr_debug(cmd, &xmit_type);
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
"is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
@ -3336,90 +3244,6 @@ void qlt_free_cmd(struct qla_tgt_cmd *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_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_srr_imm *imm;
tgt->ctio_srr_id++;
cmd->trc_flags |= TRC_SRR_CTIO;
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
*/
@ -3637,16 +3461,6 @@ static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
}
break;
}
case CTIO_SRR_RECEIVED:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
"qla_target(%d): CTIO with SRR_RECEIVED"
" status %x received (state %x, se_cmd %p)\n",
vha->vp_idx, status, cmd->state, se_cmd);
if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
break;
else
return;
case CTIO_DIF_ERROR: {
struct ctio_crc_from_fw *crc =
(struct ctio_crc_from_fw *)ctio;
@ -4499,451 +4313,6 @@ static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
return res;
}
static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
{
#if 1
/*
* FIXME: Reject non zero SRR relative offset until we can test
* this code properly.
*/
pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
return -1;
#else
struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
size_t first_offset = 0, rem_offset = offset, tmp = 0;
int i, sg_srr_cnt, bufflen = 0;
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
"Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
"cmd->sg_cnt: %u, direction: %d\n",
cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
if (!cmd->sg || !cmd->sg_cnt) {
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
"Missing cmd->sg or zero cmd->sg_cnt in"
" qla_tgt_set_data_offset\n");
return -EINVAL;
}
/*
* Walk the current cmd->sg list until we locate the new sg_srr_start
*/
for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
"sg[%d]: %p page: %p, length: %d, offset: %d\n",
i, sg, sg_page(sg), sg->length, sg->offset);
if ((sg->length + tmp) > offset) {
first_offset = rem_offset;
sg_srr_start = sg;
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
"Found matching sg[%d], using %p as sg_srr_start, "
"and using first_offset: %zu\n", i, sg,
first_offset);
break;
}
tmp += sg->length;
rem_offset -= sg->length;
}
if (!sg_srr_start) {
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
"Unable to locate sg_srr_start for offset: %u\n", offset);
return -EINVAL;
}
sg_srr_cnt = (cmd->sg_cnt - i);
sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
if (!sg_srr) {
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
"Unable to allocate sgp\n");
return -ENOMEM;
}
sg_init_table(sg_srr, sg_srr_cnt);
sgp = &sg_srr[0];
/*
* Walk the remaining list for sg_srr_start, mapping to the newly
* allocated sg_srr taking first_offset into account.
*/
for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
if (first_offset) {
sg_set_page(sgp, sg_page(sg),
(sg->length - first_offset), first_offset);
first_offset = 0;
} else {
sg_set_page(sgp, sg_page(sg), sg->length, 0);
}
bufflen += sgp->length;
sgp = sg_next(sgp);
if (!sgp)
break;
}
cmd->sg = sg_srr;
cmd->sg_cnt = sg_srr_cnt;
cmd->bufflen = bufflen;
cmd->offset += offset;
cmd->free_sg = 1;
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
cmd->sg_cnt);
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
cmd->bufflen);
ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
cmd->offset);
if (cmd->sg_cnt < 0)
BUG();
if (cmd->bufflen < 0)
BUG();
return 0;
#endif
}
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 %lld, SCSI status %d), reject",
vha->vp_idx, se_cmd->tag,
cmd->se_cmd.scsi_status);
goto out_reject;
}
break;
case SRR_IU_DATA_OUT:
if (!cmd->sg || !cmd->sg_cnt) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
"Unable to process SRR_IU_DATA_OUT due to"
" missing cmd->sg\n");
dump_stack();
goto out_reject;
}
if (se_cmd->scsi_status != 0) {
ql_dbg(ql_dbg_tgt, vha, 0xe02b,
"Rejecting SRR_IU_DATA_OUT"
" with non GOOD scsi_status\n");
goto out_reject;
}
cmd->bufflen = se_cmd->data_length;
if (qlt_has_data(cmd)) {
if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
goto out_reject;
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_notify_ack(vha, ntfy,
0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (xmit_type & QLA_TGT_XMIT_DATA) {
cmd->trc_flags |= TRC_SRR_XRDY;
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 %lld, SCSI status %d), reject",
vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
goto out_reject;
}
break;
default:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
"qla_target(%d): Unknown srr_ui value %x",
vha->vp_idx, srr_ui);
goto out_reject;
}
/* Transmit response in case of status and data-in cases */
if (resp) {
cmd->trc_flags |= TRC_SRR_RSP;
qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
}
return;
out_reject:
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
NOTIFY_ACK_SRR_FLAGS_REJECT,
NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
cmd->state = QLA_TGT_STATE_DATA_IN;
dump_stack();
} else {
cmd->trc_flags |= TRC_SRR_TERM;
qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
}
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;
#ifndef __CHECKER__
if (!ha_locked)
spin_lock_irqsave(&ha->hardware_lock, flags);
#endif
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);
#ifndef __CHECKER__
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
#endif
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 %lld, op %x), sg_cnt=%d, offset=%d",
cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
qlt_handle_srr(vha, sctio, imm);
kfree(imm);
kfree(sctio);
goto restart;
}
spin_unlock_irqrestore(&tgt->srr_lock, flags);
}
/* ha->hardware_lock supposed to be held on entry */
static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
struct imm_ntfy_from_isp *iocb)
{
struct qla_tgt_srr_imm *imm;
struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
struct qla_tgt_srr_ctio *sctio;
tgt->imm_srr_id++;
ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
vha->vp_idx);
imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
if (imm != NULL) {
memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
/* IRQ is already OFF */
spin_lock(&tgt->srr_lock);
imm->srr_id = tgt->imm_srr_id;
list_add_tail(&imm->srr_list_entry,
&tgt->srr_imm_list);
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
"IMM NTFY SRR %p added (id %d, ui %x)\n",
imm, imm->srr_id, iocb->u.isp24.srr_ui);
if (tgt->imm_srr_id == tgt->ctio_srr_id) {
int found = 0;
list_for_each_entry(sctio, &tgt->srr_ctio_list,
srr_list_entry) {
if (sctio->srr_id == imm->srr_id) {
found = 1;
break;
}
}
if (found) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
"Scheduling srr work\n");
schedule_work(&tgt->srr_work);
} else {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
"qla_target(%d): imm_srr_id "
"== ctio_srr_id (%d), but there is no "
"corresponding SRR CTIO, deleting IMM "
"SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
imm);
list_del(&imm->srr_list_entry);
kfree(imm);
spin_unlock(&tgt->srr_lock);
goto out_reject;
}
}
spin_unlock(&tgt->srr_lock);
} else {
struct qla_tgt_srr_ctio *ts;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
"qla_target(%d): Unable to allocate SRR IMM "
"entry, SRR request will be rejected\n", vha->vp_idx);
/* IRQ is already OFF */
spin_lock(&tgt->srr_lock);
list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
srr_list_entry) {
if (sctio->srr_id == tgt->imm_srr_id) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
"CTIO SRR %p deleted (id %d)\n",
sctio, sctio->srr_id);
list_del(&sctio->srr_list_entry);
qlt_send_term_exchange(vha, sctio->cmd,
&sctio->cmd->atio, 1, 0);
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
*/
@ -5065,12 +4434,6 @@ static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
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 "
@ -6021,10 +5384,6 @@ int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
spin_lock_init(&tgt->sess_work_lock);
INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
INIT_LIST_HEAD(&tgt->sess_works_list);
spin_lock_init(&tgt->srr_lock);
INIT_LIST_HEAD(&tgt->srr_ctio_list);
INIT_LIST_HEAD(&tgt->srr_imm_list);
INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
atomic_set(&tgt->tgt_global_resets_count, 0);
base_vha->vha_tgt.qla_tgt = tgt;

21
drivers/scsi/qla2xxx/qla_target.h
View File

@ -890,16 +890,7 @@ struct qla_tgt {
int notify_ack_expected;
int abts_resp_expected;
int modify_lun_expected;
int ctio_srr_id;
int imm_srr_id;
spinlock_t srr_lock;
struct list_head srr_ctio_list;
struct list_head srr_imm_list;
struct work_struct srr_work;
atomic_t tgt_global_resets_count;
struct list_head tgt_list_entry;
};
@ -1087,18 +1078,6 @@ struct qla_tgt_prm {
uint16_t tot_dsds;
};
struct qla_tgt_srr_imm {
struct list_head srr_list_entry;
int srr_id;
struct imm_ntfy_from_isp imm_ntfy;
};
struct qla_tgt_srr_ctio {
struct list_head srr_list_entry;
int srr_id;
struct qla_tgt_cmd *cmd;
};
/* Check for Switch reserved address */
#define IS_SW_RESV_ADDR(_s_id) \
((_s_id.b.domain == 0xff) && (_s_id.b.area == 0xfc))