Commit 726ceb57 authored by Raag Jadav's avatar Raag Jadav Committed by Ashutosh Dixit
Browse files

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: default avatarRaag Jadav <raag.jadav@intel.com>
Reviewed-by: default avatarMatthew Brost <matthew.brost@intel.com>
Signed-off-by: default avatarAshutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patch.msgid.link/20251030122357.128825-3-raag.jadav@intel.com
parent 99234eda

drivers/gpu/drm/xe/xe_guc_submit.c

+30 −0
Original line number Diff line number Diff line
@@ -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

drivers/gpu/drm/xe/xe_guc_submit.h

+2 −0
Original line number Diff line number Diff line
@@ -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);