[PATCH 12/28] drm/xe/vf: Abort H2G sends during VF post-migration recovery

[Matthew Brost <matthew.brost@intel.com>]

While VF post-migration recovery is in progress, abort H2G sends with
-ECANCEL. These messages are treated as lost, and TLB invalidation
errors are suppressed. During this phase, the H2G channel is down, and
VF recovery requires the CT lock to proceed.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_guc_ct.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c
index 47079ab9922c..661ab1bf4502 100644
--- a/drivers/gpu/drm/xe/xe_guc_ct.c
+++ b/drivers/gpu/drm/xe/xe_guc_ct.c
@@ -25,6 +25,7 @@
 #include "xe_gt_printk.h"
 #include "xe_gt_sriov_pf_control.h"
 #include "xe_gt_sriov_pf_monitor.h"
+#include "xe_gt_sriov_vf.h"
 #include "xe_guc.h"
 #include "xe_guc_log.h"
 #include "xe_guc_relay.h"
@@ -851,7 +852,7 @@ static int __guc_ct_send_locked(struct xe_guc_ct *ct, const u32 *action,
 				u32 len, u32 g2h_len, u32 num_g2h,
 				struct g2h_fence *g2h_fence)
 {
-	struct xe_gt *gt __maybe_unused = ct_to_gt(ct);
+	struct xe_gt *gt = ct_to_gt(ct);
 	u16 seqno;
 	int ret;
 
@@ -872,7 +873,8 @@ static int __guc_ct_send_locked(struct xe_guc_ct *ct, const u32 *action,
 		goto out;
 	}
 
-	if (ct->state == XE_GUC_CT_STATE_STOPPED) {
+	if (ct->state == XE_GUC_CT_STATE_STOPPED ||
+	    xe_gt_sriov_vf_recovery_inprogress(gt)) {
 		ret = -ECANCELED;
 		goto out;
 	}
-- 
2.34.1