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scsi: libsas: Add sas_abort_task()

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Add a generic implementation of abort task TMF handler, and use in LLDDs.

With that, some LLDDs custom TMF functions can now be deleted.

Link: https://lore.kernel.org/r/1645112566-115804-18-git-send-email-john.garry@huawei.com
Tested-by: Yihang Li <liyihang6@hisilicon.com>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry 2022-02-17 23:42:45 +08:00 committed by Martin K. Petersen
parent 72f8810e1f
commit 4fea759edf
5 changed files with 20 additions and 259 deletions
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27
drivers/scsi/hisi_sas/hisi_sas_main.c
View File

@ -10,8 +10,6 @@
#define DEV_IS_GONE(dev) \
((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
u8 *lun, struct sas_tmf_task *tmf);
static int
hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
struct domain_device *device,
@ -1416,20 +1414,6 @@ static int hisi_sas_softreset_ata_disk(struct domain_device *device)
return rc;
}
static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
u8 *lun, struct sas_tmf_task *tmf)
{
struct sas_ssp_task ssp_task;
if (!(device->tproto & SAS_PROTOCOL_SSP))
return TMF_RESP_FUNC_ESUPP;
memcpy(ssp_task.LUN, lun, 8);
return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
sizeof(ssp_task), tmf);
}
static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
{
u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
@ -1675,8 +1659,6 @@ static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
static int hisi_sas_abort_task(struct sas_task *task)
{
struct scsi_lun lun;
struct sas_tmf_task tmf_task;
struct domain_device *device = task->dev;
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_hba *hisi_hba;
@ -1711,18 +1693,11 @@ static int hisi_sas_abort_task(struct sas_task *task)
spin_unlock_irqrestore(&task->task_state_lock, flags);
if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
struct scsi_cmnd *cmnd = task->uldd_task;
struct hisi_sas_slot *slot = task->lldd_task;
u16 tag = slot->idx;
int rc2;
int_to_scsilun(cmnd->device->lun, &lun);
tmf_task.tmf = TMF_ABORT_TASK;
tmf_task.tag_of_task_to_be_managed = tag;
rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
&tmf_task);
rc = sas_abort_task(task, tag);
rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_CMD, tag,
false);

16
drivers/scsi/libsas/sas_scsi_host.c
View File

@ -1089,6 +1089,22 @@ int sas_query_task(struct sas_task *task, u16 tag)
}
EXPORT_SYMBOL_GPL(sas_query_task);
int sas_abort_task(struct sas_task *task, u16 tag)
{
struct sas_tmf_task tmf_task = {
.tmf = TMF_ABORT_TASK,
.tag_of_task_to_be_managed = tag,
};
struct scsi_cmnd *cmnd = task->uldd_task;
struct domain_device *dev = task->dev;
struct scsi_lun lun;
int_to_scsilun(cmnd->device->lun, &lun);
return sas_execute_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
}
EXPORT_SYMBOL_GPL(sas_abort_task);
/*
* Tell an upper layer that it needs to initiate an abort for a given task.
* This should only ever be called by an LLDD.

118
drivers/scsi/mvsas/mv_sas.c
View File

@ -1254,114 +1254,6 @@ void mvs_dev_gone(struct domain_device *dev)
mvs_dev_gone_notify(dev);
}
static void mvs_task_done(struct sas_task *task)
{
if (!del_timer(&task->slow_task->timer))
return;
complete(&task->slow_task->completion);
}
static void mvs_tmf_timedout(struct timer_list *t)
{
struct sas_task_slow *slow = from_timer(slow, t, timer);
struct sas_task *task = slow->task;
task->task_state_flags |= SAS_TASK_STATE_ABORTED;
complete(&task->slow_task->completion);
}
#define MVS_TASK_TIMEOUT 20
static int mvs_exec_internal_tmf_task(struct domain_device *dev,
void *parameter, u32 para_len, struct sas_tmf_task *tmf)
{
int res, retry;
struct sas_task *task = NULL;
for (retry = 0; retry < 3; retry++) {
task = sas_alloc_slow_task(GFP_KERNEL);
if (!task)
return -ENOMEM;
task->dev = dev;
task->task_proto = dev->tproto;
memcpy(&task->ssp_task, parameter, para_len);
task->task_done = mvs_task_done;
task->slow_task->timer.function = mvs_tmf_timedout;
task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
add_timer(&task->slow_task->timer);
task->tmf = tmf;
res = mvs_queue_command(task, GFP_KERNEL);
if (res) {
del_timer(&task->slow_task->timer);
mv_printk("executing internal task failed:%d\n", res);
goto ex_err;
}
wait_for_completion(&task->slow_task->completion);
res = TMF_RESP_FUNC_FAILED;
/* Even TMF timed out, return direct. */
if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
mv_printk("TMF task[%x] timeout.\n", tmf->tmf);
goto ex_err;
}
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == SAS_SAM_STAT_GOOD) {
res = TMF_RESP_FUNC_COMPLETE;
break;
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == SAS_DATA_UNDERRUN) {
/* no error, but return the number of bytes of
* underrun */
res = task->task_status.residual;
break;
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == SAS_DATA_OVERRUN) {
mv_dprintk("blocked task error.\n");
res = -EMSGSIZE;
break;
} else {
mv_dprintk(" task to dev %016llx response: 0x%x "
"status 0x%x\n",
SAS_ADDR(dev->sas_addr),
task->task_status.resp,
task->task_status.stat);
sas_free_task(task);
task = NULL;
}
}
ex_err:
BUG_ON(retry == 3 && task != NULL);
sas_free_task(task);
return res;
}
static int mvs_debug_issue_ssp_tmf(struct domain_device *dev,
u8 *lun, struct sas_tmf_task *tmf)
{
struct sas_ssp_task ssp_task;
if (!(dev->tproto & SAS_PROTOCOL_SSP))
return TMF_RESP_FUNC_ESUPP;
memcpy(ssp_task.LUN, lun, 8);
return mvs_exec_internal_tmf_task(dev, &ssp_task,
sizeof(ssp_task), tmf);
}
/* Standard mandates link reset for ATA (type 0)
and hard reset for SSP (type 1) , only for RECOVERY */
static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
@ -1452,8 +1344,6 @@ int mvs_query_task(struct sas_task *task)
/* mandatory SAM-3, still need free task/slot info */
int mvs_abort_task(struct sas_task *task)
{
struct scsi_lun lun;
struct sas_tmf_task tmf_task;
struct domain_device *dev = task->dev;
struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
struct mvs_info *mvi;
@ -1477,9 +1367,6 @@ int mvs_abort_task(struct sas_task *task)
spin_unlock_irqrestore(&task->task_state_lock, flags);
mvi_dev->dev_status = MVS_DEV_EH;
if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
int_to_scsilun(cmnd->device->lun, &lun);
rc = mvs_find_tag(mvi, task, &tag);
if (rc == 0) {
mv_printk("No such tag in %s\n", __func__);
@ -1487,10 +1374,7 @@ int mvs_abort_task(struct sas_task *task)
return rc;
}
tmf_task.tmf = TMF_ABORT_TASK;
tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
rc = sas_abort_task(task, tag);
/* if successful, clear the task and callback forwards.*/
if (rc == TMF_RESP_FUNC_COMPLETE) {

117
drivers/scsi/pm8001/pm8001_sas.c
View File

@ -706,103 +706,6 @@ static void pm8001_tmf_timedout(struct timer_list *t)
}
#define PM8001_TASK_TIMEOUT 20
/**
* pm8001_exec_internal_tmf_task - execute some task management commands.
* @dev: the wanted device.
* @tmf: which task management wanted to be take.
* @para_len: para_len.
* @parameter: ssp task parameter.
*
* when errors or exception happened, we may want to do something, for example
* abort the issued task which result in this exception, it is done by calling
* this function, note it is also with the task execute interface.
*/
static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
void *parameter, u32 para_len, struct sas_tmf_task *tmf)
{
int res, retry;
struct sas_task *task = NULL;
struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
struct pm8001_device *pm8001_dev = dev->lldd_dev;
DECLARE_COMPLETION_ONSTACK(completion_setstate);
for (retry = 0; retry < 3; retry++) {
task = sas_alloc_slow_task(GFP_KERNEL);
if (!task)
return -ENOMEM;
task->dev = dev;
task->task_proto = dev->tproto;
memcpy(&task->ssp_task, parameter, para_len);
task->task_done = pm8001_task_done;
task->slow_task->timer.function = pm8001_tmf_timedout;
task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
add_timer(&task->slow_task->timer);
task->tmf = tmf;
res = pm8001_queue_command(task, GFP_KERNEL);
if (res) {
del_timer(&task->slow_task->timer);
pm8001_dbg(pm8001_ha, FAIL, "Executing internal task failed\n");
goto ex_err;
}
wait_for_completion(&task->slow_task->completion);
if (pm8001_ha->chip_id != chip_8001) {
pm8001_dev->setds_completion = &completion_setstate;
PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
pm8001_dev, DS_OPERATIONAL);
wait_for_completion(&completion_setstate);
}
res = -TMF_RESP_FUNC_FAILED;
/* Even TMF timed out, return direct. */
if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
struct pm8001_ccb_info *ccb = task->lldd_task;
pm8001_dbg(pm8001_ha, FAIL, "TMF task[%x]timeout.\n",
tmf->tmf);
if (ccb)
ccb->task = NULL;
goto ex_err;
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == SAS_SAM_STAT_GOOD) {
res = TMF_RESP_FUNC_COMPLETE;
break;
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == SAS_DATA_UNDERRUN) {
/* no error, but return the number of bytes of
* underrun */
res = task->task_status.residual;
break;
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == SAS_DATA_OVERRUN) {
pm8001_dbg(pm8001_ha, FAIL, "Blocked task error.\n");
res = -EMSGSIZE;
break;
} else {
pm8001_dbg(pm8001_ha, EH,
" Task to dev %016llx response:0x%x status 0x%x\n",
SAS_ADDR(dev->sas_addr),
task->task_status.resp,
task->task_status.stat);
sas_free_task(task);
task = NULL;
}
}
ex_err:
BUG_ON(retry == 3 && task != NULL);
sas_free_task(task);
return res;
}
static int
pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
@ -910,18 +813,6 @@ void pm8001_dev_gone(struct domain_device *dev)
pm8001_dev_gone_notify(dev);
}
static int pm8001_issue_ssp_tmf(struct domain_device *dev,
u8 *lun, struct sas_tmf_task *tmf)
{
struct sas_ssp_task ssp_task;
if (!(dev->tproto & SAS_PROTOCOL_SSP))
return TMF_RESP_FUNC_ESUPP;
memcpy((u8 *)&ssp_task.LUN, lun, 8);
return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
tmf);
}
/* retry commands by ha, by task and/or by device */
void pm8001_open_reject_retry(
struct pm8001_hba_info *pm8001_ha,
@ -1181,9 +1072,7 @@ int pm8001_abort_task(struct sas_task *task)
u32 tag;
struct domain_device *dev ;
struct pm8001_hba_info *pm8001_ha;
struct scsi_lun lun;
struct pm8001_device *pm8001_dev;
struct sas_tmf_task tmf_task;
int rc = TMF_RESP_FUNC_FAILED, ret;
u32 phy_id, port_id;
struct sas_task_slow slow_task;
@ -1219,11 +1108,7 @@ int pm8001_abort_task(struct sas_task *task)
}
spin_unlock_irqrestore(&task->task_state_lock, flags);
if (task->task_proto & SAS_PROTOCOL_SSP) {
struct scsi_cmnd *cmnd = task->uldd_task;
int_to_scsilun(cmnd->device->lun, &lun);
tmf_task.tmf = TMF_ABORT_TASK;
tmf_task.tag_of_task_to_be_managed = tag;
rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
rc = sas_abort_task(task, tag);
pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
pm8001_dev->sas_device, 0, tag);
} else if (task->task_proto & SAS_PROTOCOL_SATA ||

1
include/scsi/libsas.h
View File

@ -726,6 +726,7 @@ int sas_abort_task_set(struct domain_device *dev, u8 *lun);
int sas_clear_task_set(struct domain_device *dev, u8 *lun);
int sas_lu_reset(struct domain_device *dev, u8 *lun);
int sas_query_task(struct sas_task *task, u16 tag);
int sas_abort_task(struct sas_task *task, u16 tag);
int sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
gfp_t gfp_flags);