Commit 75e7d262 authored by Satyanarayana K V P's avatar Satyanarayana K V P Committed by Michal Wajdeczko
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drm/xe/vf: Requeue recovery on GuC MIGRATION error during VF post-migration 



Handle GuC response `XE_GUC_RESPONSE_VF_MIGRATED` as a special case in the
VF post-migration recovery flow. When this error occurs, it indicates that
a new migration was detected while the resource fixup process was still in
progress. Instead of failing immediately, requeue the VF into the recovery
path to allow proper handling of the new migration event.

This improves robustness of VF recovery in SR-IOV environments where
migrations can overlap with resource fixup steps.

Signed-off-by: default avatarSatyanarayana K V P <satyanarayana.k.v.p@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Tomasz Lis <tomasz.lis@intel.com>
Reviewed-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251201095011.21453-9-satyanarayana.k.v.p@intel.com
parent b5fbb943

drivers/gpu/drm/xe/xe_gt_sriov_vf.c

+3 −0
Original line number Diff line number Diff line
@@ -1268,6 +1268,9 @@ static void vf_post_migration_recovery(struct xe_gt *gt) 


	err = vf_post_migration_resfix_done(gt, marker);

	if (err) {

		if (err == -EREMCHG)

			goto queue;



		xe_gt_sriov_err(gt, "Recovery failed at GuC RESFIX_DONE step (%pe)\n",

				ERR_PTR(err));

		goto fail;

drivers/gpu/drm/xe/xe_guc.c

+6 −0
Original line number Diff line number Diff line
@@ -1484,6 +1484,12 @@ int xe_guc_mmio_send_recv(struct xe_guc *guc, const u32 *request, 
		u32 hint = FIELD_GET(GUC_HXG_FAILURE_MSG_0_HINT, header);

		u32 error = FIELD_GET(GUC_HXG_FAILURE_MSG_0_ERROR, header);



		if (unlikely(error == XE_GUC_RESPONSE_VF_MIGRATED)) {

			xe_gt_dbg(gt, "GuC mmio request %#x rejected due to MIGRATION (hint %#x)\n",

				  request[0], hint);

			return -EREMCHG;

		}



		xe_gt_err(gt, "GuC mmio request %#x: failure %#x hint %#x\n",

			  request[0], error, hint);

		return -ENXIO;