Merge tag 'drm-xe-fixes-2025-06-19' of https://gitlab.freedesktop.org/drm/xe/kernel into drm-fixes

Driver Changes:
- A workaround update (Vinay)
- Fix memset on iomem (Lucas)
- Fix early wedge on GuC Load failure (Daniele)

Signed-off-by: Dave Airlie <[email protected]>

From: Thomas Hellstrom <[email protected]>
Link: https://lore.kernel.org/r/aFQ03kNzhbiNK7gW@fedora

Author: airlied

drivers/gpu/drm/xe/xe_gt.c

@@ -118,7 +118,7 @@ static void xe_gt_enable_host_l2_vram(struct xe_gt *gt)
 		xe_gt_mcr_multicast_write(gt, XE2_GAMREQSTRM_CTRL, reg);
 	}
 
-	xe_gt_mcr_multicast_write(gt, XEHPC_L3CLOS_MASK(3), 0x3);
+	xe_gt_mcr_multicast_write(gt, XEHPC_L3CLOS_MASK(3), 0xF);
 	xe_force_wake_put(gt_to_fw(gt), fw_ref);
 }
 

drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c

@@ -137,6 +137,14 @@ void xe_gt_tlb_invalidation_reset(struct xe_gt *gt)
 	struct xe_gt_tlb_invalidation_fence *fence, *next;
 	int pending_seqno;
 
+	/*
+	 * we can get here before the CTs are even initialized if we're wedging
+	 * very early, in which case there are not going to be any pending
+	 * fences so we can bail immediately.
+	 */
+	if (!xe_guc_ct_initialized(&gt->uc.guc.ct))
+		return;
+
 	/*
 	 * CT channel is already disabled at this point. No new TLB requests can
 	 * appear.

drivers/gpu/drm/xe/xe_guc_ct.c

@@ -514,6 +514,9 @@ void xe_guc_ct_disable(struct xe_guc_ct *ct)
  */
 void xe_guc_ct_stop(struct xe_guc_ct *ct)
 {
+	if (!xe_guc_ct_initialized(ct))
+		return;
+
 	xe_guc_ct_set_state(ct, XE_GUC_CT_STATE_STOPPED);
 	stop_g2h_handler(ct);
 }
@@ -760,7 +763,7 @@ static int __guc_ct_send_locked(struct xe_guc_ct *ct, const u32 *action,
 	u16 seqno;
 	int ret;
 
-	xe_gt_assert(gt, ct->state != XE_GUC_CT_STATE_NOT_INITIALIZED);
+	xe_gt_assert(gt, xe_guc_ct_initialized(ct));
 	xe_gt_assert(gt, !g2h_len || !g2h_fence);
 	xe_gt_assert(gt, !num_g2h || !g2h_fence);
 	xe_gt_assert(gt, !g2h_len || num_g2h);
@@ -1344,7 +1347,7 @@ static int g2h_read(struct xe_guc_ct *ct, u32 *msg, bool fast_path)
 	u32 action;
 	u32 *hxg;
 
-	xe_gt_assert(gt, ct->state != XE_GUC_CT_STATE_NOT_INITIALIZED);
+	xe_gt_assert(gt, xe_guc_ct_initialized(ct));
 	lockdep_assert_held(&ct->fast_lock);
 
 	if (ct->state == XE_GUC_CT_STATE_DISABLED)

drivers/gpu/drm/xe/xe_guc_ct.h

@@ -22,6 +22,11 @@ void xe_guc_ct_snapshot_print(struct xe_guc_ct_snapshot *snapshot, struct drm_pr
 void xe_guc_ct_snapshot_free(struct xe_guc_ct_snapshot *snapshot);
 void xe_guc_ct_print(struct xe_guc_ct *ct, struct drm_printer *p, bool want_ctb);
 
+static inline bool xe_guc_ct_initialized(struct xe_guc_ct *ct)
+{
+	return ct->state != XE_GUC_CT_STATE_NOT_INITIALIZED;
+}
+
 static inline bool xe_guc_ct_enabled(struct xe_guc_ct *ct)
 {
 	return ct->state == XE_GUC_CT_STATE_ENABLED;

drivers/gpu/drm/xe/xe_guc_pc.c

@@ -1068,7 +1068,7 @@ int xe_guc_pc_start(struct xe_guc_pc *pc)
 		goto out;
 	}
 
-	memset(pc->bo->vmap.vaddr, 0, size);
+	xe_map_memset(xe, &pc->bo->vmap, 0, 0, size);
 	slpc_shared_data_write(pc, header.size, size);
 
 	earlier = ktime_get();

drivers/gpu/drm/xe/xe_guc_submit.c

@@ -1762,6 +1762,9 @@ int xe_guc_submit_reset_prepare(struct xe_guc *guc)
 {
 	int ret;
 
+	if (!guc->submission_state.initialized)
+		return 0;
+
 	/*
 	 * Using an atomic here rather than submission_state.lock as this
 	 * function can be called while holding the CT lock (engine reset