drm/xe/vf: Reset TLB invalidations during VF post migration recovery

TLB invalidations requests can be lost during VF post-migration
recovery. Since the VF has migrated, these invalidations are no longer
needed.

Reset the TLB invalidation frontend, which will signal all pending
fences.

v3:
 - Move TLB invalidation reset after pausing submission (Tomasz)
 - Adjust commit message (Michal)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Tomasz Lis <tomasz.lis@intel.com>
Link: https://lore.kernel.org/r/20251008214532.3442967-22-matthew.brost@intel.com

diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c
index e6f6a5c8ef1b74d86d0bfb50bd112f299f583f2c..75a20de71d8b98c9355eed141d1c8e54977b2069 100644 (file)
--- a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c
@@ -35,6 +35,7 @@
 #include "xe_sriov.h"
 #include "xe_sriov_vf.h"
 #include "xe_tile_sriov_vf.h"
+#include "xe_tlb_inval.h"
 #include "xe_uc_fw.h"
 #include "xe_wopcm.h"
 
@@ -1107,6 +1108,7 @@ static void vf_post_migration_shutdown(struct xe_gt *gt)
 
        xe_guc_ct_flush_and_stop(&gt->uc.guc.ct);
        xe_guc_submit_pause(&gt->uc.guc);
+       xe_tlb_inval_reset(&gt->tlb_inval);
 }
 
 static size_t post_migration_scratch_size(struct xe_device *xe)