[PATCH v2 06/18] scsi: libsas: Move SMP task handlers to core

John Garry
2022-02-17T15:48:55Z

Move the SMP task handlers to the core host code as they will be re-used
for executing internal abort and TMF tasks.

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/libsas/sas_expander.c | 24 ++----------------------
drivers/scsi/libsas/sas_internal.h | 3 +++
drivers/scsi/libsas/sas_scsi_host.c | 24 ++++++++++++++++++++++++
3 files changed, 29 insertions(+), 22 deletions(-)

diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 6abce9dfc17b..260e735d06fa 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -28,26 +28,6 @@ static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr);

/* ---------- SMP task management ---------- */

-static void smp_task_timedout(struct timer_list *t)
-{
- struct sas_task_slow *slow = from_timer(slow, t, timer);
- struct sas_task *task = slow->task;
- unsigned long flags;
-
- spin_lock_irqsave(&task->task_state_lock, flags);
- if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
- task->task_state_flags |= SAS_TASK_STATE_ABORTED;
- complete(&task->slow_task->completion);
- }
- spin_unlock_irqrestore(&task->task_state_lock, flags);
-}
-
-static void smp_task_done(struct sas_task *task)
-{
- del_timer(&task->slow_task->timer);
- complete(&task->slow_task->completion);
-}
-
/* Give it some long enough timeout. In seconds. */
#define SMP_TIMEOUT 10

@@ -78,9 +58,9 @@ static int smp_execute_task_sg(struct domain_device *dev,
task->smp_task.smp_req = *req;
task->smp_task.smp_resp = *resp;

- task->task_done = smp_task_done;
+ task->task_done = sas_task_internal_done;

- task->slow_task->timer.function = smp_task_timedout;
+ task->slow_task->timer.function = sas_task_internal_timedout;
task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
add_timer(&task->slow_task->timer);

diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h
index acd515c01861..cd6aa723c3e1 100644
--- a/drivers/scsi/libsas/sas_internal.h
+++ b/drivers/scsi/libsas/sas_internal.h
@@ -95,6 +95,9 @@ void sas_destruct_devices(struct asd_sas_port *port);
extern const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS];
extern const work_func_t sas_port_event_fns[PORT_NUM_EVENTS];

+void sas_task_internal_done(struct sas_task *task);
+void sas_task_internal_timedout(struct timer_list *t);
+
#ifdef CONFIG_SCSI_SAS_HOST_SMP
extern void sas_smp_host_handler(struct bsg_job *job, struct Scsi_Host *shost);
#else
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index 387083a16a79..40dcb4e8a747 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -893,6 +893,30 @@ int sas_bios_param(struct scsi_device *scsi_dev,
}
EXPORT_SYMBOL_GPL(sas_bios_param);

+void sas_task_internal_done(struct sas_task *task)
+{
+ del_timer(&task->slow_task->timer);
+ complete(&task->slow_task->completion);
+}
+
+void sas_task_internal_timedout(struct timer_list *t)
+{
+ struct sas_task_slow *slow = from_timer(slow, t, timer);
+ struct sas_task *task = slow->task;
+ bool is_completed = true;
+ unsigned long flags;
+
+ spin_lock_irqsave(&task->task_state_lock, flags);
+ if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
+ task->task_state_flags |= SAS_TASK_STATE_ABORTED;
+ is_completed = false;
+ }
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+ if (!is_completed)
+ complete(&task->slow_task->completion);
+}
+
/*
* Tell an upper layer that it needs to initiate an abort for a given task.
* This should only ever be called by an LLDD.
--
2.26.2