Commit 3061e8e0 authored by Matthew Brost's avatar Matthew Brost
Browse files

drm/xe/vf: Flush and stop CTs in VF post migration recovery 



Flushing CTs (i.e., progressing all pending G2H messages) gives VF
post-migration recovery an accurate view of which H2G messages the GuC
has processed, enabling the GuC submission state machine to correctly
rebuild all state.

Also, stop all CT traffic, as the CT is not live during VF
post-migration recovery.

v3:
 - xe_guc_ct_flush_and_stop rename (Michal)
 - Drop extra GuC CT WQ wake up (Michal)

Signed-off-by: default avatarMatthew Brost <matthew.brost@intel.com>
Reviewed-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://lore.kernel.org/r/20251008214532.3442967-21-matthew.brost@intel.com
parent 1f135a1e

drivers/gpu/drm/xe/xe_gt_sriov_vf.c

+1 −0
Original line number Diff line number Diff line
@@ -1105,6 +1105,7 @@ static void vf_post_migration_shutdown(struct xe_gt *gt) 
	gt->sriov.vf.migration.recovery_queued = false;

	spin_unlock_irq(&gt->sriov.vf.migration.lock);



	xe_guc_ct_flush_and_stop(&gt->uc.guc.ct);

	xe_guc_submit_pause(&gt->uc.guc);

}

drivers/gpu/drm/xe/xe_guc_ct.c

+10 −0
Original line number Diff line number Diff line
@@ -574,6 +574,16 @@ void xe_guc_ct_disable(struct xe_guc_ct *ct) 
	stop_g2h_handler(ct);

}



/**

 * xe_guc_ct_flush_and_stop - Flush and stop all processing of G2H / H2G

 * @ct: the &xe_guc_ct

 */

void xe_guc_ct_flush_and_stop(struct xe_guc_ct *ct)

{

	receive_g2h(ct);

	xe_guc_ct_stop(ct);

}



/**

 * xe_guc_ct_stop - Set GuC to stopped state

 * @ct: the &xe_guc_ct

drivers/gpu/drm/xe/xe_guc_ct.h

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ int xe_guc_ct_init_post_hwconfig(struct xe_guc_ct *ct); 
int xe_guc_ct_enable(struct xe_guc_ct *ct);

void xe_guc_ct_disable(struct xe_guc_ct *ct);

void xe_guc_ct_stop(struct xe_guc_ct *ct);

void xe_guc_ct_flush_and_stop(struct xe_guc_ct *ct);

void xe_guc_ct_fast_path(struct xe_guc_ct *ct);



struct xe_guc_ct_snapshot *xe_guc_ct_snapshot_capture(struct xe_guc_ct *ct);