drm/xe: Move ufence check to op_lock_and_prep

Rather than checking for an unsignaled ufence ay unbind time, check for
this during the op_lock_and_prep function. This helps with the
transition to job 1 per VM bind IOCTL.

v2:
 - Rebase
v3:
 - Fix typo in commit message (Oak)
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Oak Zeng <oak.zeng@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240425045513.1913039-11-matthew.brost@intel.com

drivers/gpu/drm/xe/xe_vm.c

@@ -1653,16 +1653,6 @@ xe_vm_unbind_vma(struct xe_vma *vma, struct xe_exec_queue *q,
 
 	trace_xe_vma_unbind(vma);
 
-	if (vma->ufence) {
-		struct xe_user_fence * const f = vma->ufence;
-
-		if (!xe_sync_ufence_get_status(f))
-			return ERR_PTR(-EBUSY);
-
-		vma->ufence = NULL;
-		xe_sync_ufence_put(f);
-	}
-
 	if (number_tiles > 1) {
 		fences = kmalloc_array(number_tiles, sizeof(*fences),
 				       GFP_KERNEL);
@@ -2717,6 +2707,21 @@ static int vma_lock_and_validate(struct drm_exec *exec, struct xe_vma *vma,
 	return err;
 }
 
+static int check_ufence(struct xe_vma *vma)
+{
+	if (vma->ufence) {
+		struct xe_user_fence * const f = vma->ufence;
+
+		if (!xe_sync_ufence_get_status(f))
+			return -EBUSY;
+
+		vma->ufence = NULL;
+		xe_sync_ufence_put(f);
+	}
+
+	return 0;
+}
+
 static int op_lock_and_prep(struct drm_exec *exec, struct xe_vm *vm,
 			    struct xe_vma_op *op)
 {
@@ -2729,6 +2734,10 @@ static int op_lock_and_prep(struct drm_exec *exec, struct xe_vm *vm,
 					    op->map.immediate);
 		break;
 	case DRM_GPUVA_OP_REMAP:
+		err = check_ufence(gpuva_to_vma(op->base.remap.unmap->va));
+		if (err)
+			break;
+
 		err = vma_lock_and_validate(exec,
 					    gpuva_to_vma(op->base.remap.unmap->va),
 					    false);
@@ -2738,6 +2747,10 @@ static int op_lock_and_prep(struct drm_exec *exec, struct xe_vm *vm,
 			err = vma_lock_and_validate(exec, op->remap.next, true);
 		break;
 	case DRM_GPUVA_OP_UNMAP:
+		err = check_ufence(gpuva_to_vma(op->base.unmap.va));
+		if (err)
+			break;
+
 		err = vma_lock_and_validate(exec,
 					    gpuva_to_vma(op->base.unmap.va),
 					    false);