[PATCH v2 17/18] scsi: libsas: Add sas_abort_task()

John Garry
2022-02-17T15:50:03Z

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

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

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Yihang Li <liyihang6@hisilicon.com>
---
drivers/scsi/hisi_sas/hisi_sas_main.c | 27 +-----
drivers/scsi/libsas/sas_scsi_host.c | 16 ++++
drivers/scsi/mvsas/mv_sas.c | 118 +-------------------------
drivers/scsi/pm8001/pm8001_sas.c | 117 +------------------------
include/scsi/libsas.h | 1 +
5 files changed, 20 insertions(+), 259 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 808eefaf3359..34ed4f8da7cc 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -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);
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index 1923a0627ce7..87dd18a85f6f 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -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.
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index 63a96c307e3c..a6867dae0e7c 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -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) {
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index e8bdc3390019..828d719afa1b 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -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 ||
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index bf8613fb1c4e..4ea964d33600 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -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);
--
2.26.2