drm/xe/guc_submit: Introduce pause/unpause() helpers for PF

Introduce pause/unpause() helpers which stop/start further runs of
submission tasks on given GuC and can be called from PF context. This
is in preparation of usecases where we simply need to stop/start the
scheduler without losing GuC state and don't require dealing with VF
migration.

v7: Reword commit message (Matthew Brost)

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patch.msgid.link/20251030122357.128825-3-raag.jadav@intel.com

diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index cc7559cab9b377187461b5c320725418bcc93073..3ca2558c8c96e619adc41ad29640ba36a5fb0aa9 100644 (file)
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -2168,6 +2168,21 @@ static void guc_exec_queue_pause(struct xe_guc *guc, struct xe_exec_queue *q)
        }
 }
 
+/**
+ * xe_guc_submit_pause - Stop further runs of submission tasks on given GuC.
+ * @guc: the &xe_guc struct instance whose scheduler is to be disabled
+ */
+void xe_guc_submit_pause(struct xe_guc *guc)
+{
+       struct xe_exec_queue *q;
+       unsigned long index;
+
+       mutex_lock(&guc->submission_state.lock);
+       xa_for_each(&guc->submission_state.exec_queue_lookup, index, q)
+               xe_sched_submission_stop(&q->guc->sched);
+       mutex_unlock(&guc->submission_state.lock);
+}
+
 /**
  * xe_guc_submit_pause_vf - Stop further runs of submission tasks for VF.
  * @guc: the &xe_guc struct instance whose scheduler is to be disabled
@@ -2343,6 +2358,21 @@ static void guc_exec_queue_unpause(struct xe_guc *guc, struct xe_exec_queue *q)
        xe_sched_submission_resume_tdr(sched);
 }
 
+/**
+ * xe_guc_submit_unpause - Allow further runs of submission tasks on given GuC.
+ * @guc: the &xe_guc struct instance whose scheduler is to be enabled
+ */
+void xe_guc_submit_unpause(struct xe_guc *guc)
+{
+       struct xe_exec_queue *q;
+       unsigned long index;
+
+       mutex_lock(&guc->submission_state.lock);
+       xa_for_each(&guc->submission_state.exec_queue_lookup, index, q)
+               xe_sched_submission_start(&q->guc->sched);
+       mutex_unlock(&guc->submission_state.lock);
+}
+
 /**
  * xe_guc_submit_unpause_vf - Allow further runs of submission tasks for VF.
  * @guc: the &xe_guc struct instance whose scheduler is to be enabled

diff --git a/drivers/gpu/drm/xe/xe_guc_submit.h b/drivers/gpu/drm/xe/xe_guc_submit.h
index 0e79968361316af93b174c27e4f5239d10423279..100a7891b9187d9c536e873abbff8f4ecc5df41f 100644 (file)
--- a/drivers/gpu/drm/xe/xe_guc_submit.h
+++ b/drivers/gpu/drm/xe/xe_guc_submit.h
@@ -20,8 +20,10 @@ int xe_guc_submit_reset_prepare(struct xe_guc *guc);
 void xe_guc_submit_reset_wait(struct xe_guc *guc);
 void xe_guc_submit_stop(struct xe_guc *guc);
 int xe_guc_submit_start(struct xe_guc *guc);
+void xe_guc_submit_pause(struct xe_guc *guc);
 void xe_guc_submit_pause_abort(struct xe_guc *guc);
 void xe_guc_submit_pause_vf(struct xe_guc *guc);
+void xe_guc_submit_unpause(struct xe_guc *guc);
 void xe_guc_submit_unpause_vf(struct xe_guc *guc);
 void xe_guc_submit_unpause_prepare_vf(struct xe_guc *guc);
 void xe_guc_submit_wedge(struct xe_guc *guc);