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scsi: libsas: Add sas_execute_internal_abort_single()

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The internal abort feature is common to hisi_sas and pm8001 HBAs, and the
driver support is similar also, so add a common handler.

Two modes of operation will be supported:

 - single: Abort a single tagged command

 - device: Abort all commands associated with a specific domain device

A new protocol is added, SAS_PROTOCOL_INTERNAL_ABORT, so the common queue
command API may be re-used.

Only add "single" support as a first step.

Link: https://lore.kernel.org/r/1647001432-239276-2-git-send-email-john.garry@huawei.com
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
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 2022-03-11 20:23:49 +08:00 committed by Martin K. Petersen
parent 2ea3a393bf
commit 5c9bf3635b
3 changed files with 90 additions and 0 deletions
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74
drivers/scsi/libsas/sas_scsi_host.c
View File

@ -920,6 +920,80 @@ void sas_task_internal_timedout(struct timer_list *t)
#define TASK_TIMEOUT (20 * HZ)
#define TASK_RETRY 3
static int sas_execute_internal_abort(struct domain_device *device,
enum sas_internal_abort type, u16 tag,
unsigned int qid, void *data)
{
struct sas_ha_struct *ha = device->port->ha;
struct sas_internal *i = to_sas_internal(ha->core.shost->transportt);
struct sas_task *task = NULL;
int res, retry;
for (retry = 0; retry < TASK_RETRY; retry++) {
task = sas_alloc_slow_task(GFP_KERNEL);
if (!task)
return -ENOMEM;
task->dev = device;
task->task_proto = SAS_PROTOCOL_INTERNAL_ABORT;
task->task_done = sas_task_internal_done;
task->slow_task->timer.function = sas_task_internal_timedout;
task->slow_task->timer.expires = jiffies + TASK_TIMEOUT;
add_timer(&task->slow_task->timer);
task->abort_task.tag = tag;
task->abort_task.type = type;
res = i->dft->lldd_execute_task(task, GFP_KERNEL);
if (res) {
del_timer_sync(&task->slow_task->timer);
pr_err("Executing internal abort failed %016llx (%d)\n",
SAS_ADDR(device->sas_addr), res);
break;
}
wait_for_completion(&task->slow_task->completion);
res = TMF_RESP_FUNC_FAILED;
/* Even if the internal abort timed out, return direct. */
if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
pr_err("Internal abort: timeout %016llx\n",
SAS_ADDR(device->sas_addr));
res = -EIO;
break;
}
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 == TMF_RESP_FUNC_SUCC) {
res = TMF_RESP_FUNC_SUCC;
break;
}
pr_err("Internal abort: task to dev %016llx response: 0x%x status 0x%x\n",
SAS_ADDR(device->sas_addr), task->task_status.resp,
task->task_status.stat);
sas_free_task(task);
task = NULL;
}
BUG_ON(retry == TASK_RETRY && task != NULL);
sas_free_task(task);
return res;
}
int sas_execute_internal_abort_single(struct domain_device *device, u16 tag,
unsigned int qid, void *data)
{
return sas_execute_internal_abort(device, SAS_INTERNAL_ABORT_SINGLE,
tag, qid, data);
}
EXPORT_SYMBOL_GPL(sas_execute_internal_abort_single);
int sas_execute_tmf(struct domain_device *device, void *parameter,
int para_len, int force_phy_id,
struct sas_tmf_task *tmf)

14
include/scsi/libsas.h
View File

@ -557,6 +557,16 @@ struct sas_ata_task {
int force_phy_id;
};
/* LLDDs rely on these values */
enum sas_internal_abort {
SAS_INTERNAL_ABORT_SINGLE = 0,
};
struct sas_internal_abort_task {
enum sas_internal_abort type;
u16 tag;
};
struct sas_smp_task {
struct scatterlist smp_req;
struct scatterlist smp_resp;
@ -596,6 +606,7 @@ struct sas_task {
struct sas_ata_task ata_task;
struct sas_smp_task smp_task;
struct sas_ssp_task ssp_task;
struct sas_internal_abort_task abort_task;
};
struct scatterlist *scatter;
@ -683,6 +694,9 @@ extern int sas_slave_configure(struct scsi_device *);
extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
extern int sas_bios_param(struct scsi_device *, struct block_device *,
sector_t capacity, int *hsc);
int sas_execute_internal_abort_single(struct domain_device *device,
u16 tag, unsigned int qid,
void *data);
extern struct scsi_transport_template *
sas_domain_attach_transport(struct sas_domain_function_template *);
extern struct device_attribute dev_attr_phy_event_threshold;

2
include/scsi/sas.h
View File

@ -95,6 +95,8 @@ enum sas_protocol {
SAS_PROTOCOL_SSP = 0x08,
SAS_PROTOCOL_ALL = 0x0E,
SAS_PROTOCOL_STP_ALL = SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA,
/* these are internal to libsas */
SAS_PROTOCOL_INTERNAL_ABORT = 0x10,
};
/* From the spec; local phys only */