drm/xe: Move ufence add to vm_bind_ioctl_ops_fini

Rather than adding a ufence to a VMA in the bind function, add the
ufence to all VMAs in the IOCTL that require binds in
vm_bind_ioctl_ops_fini. This help withs the transition to job 1 per VM
bind IOCTL.

v2:
 - Rebase
v3:
 - Fix typo in commit (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/20240425045513.1913039-12-matthew.brost@intel.com

drivers/gpu/drm/xe/xe_sync.c

@@ -338,6 +338,21 @@ xe_sync_in_fence_get(struct xe_sync_entry *sync, int num_sync,
 	return ERR_PTR(-ENOMEM);
 }
 
+/**
+ * __xe_sync_ufence_get() - Get user fence from user fence
+ * @ufence: input user fence
+ *
+ * Get a user fence reference from user fence
+ *
+ * Return: xe_user_fence pointer with reference
+ */
+struct xe_user_fence *__xe_sync_ufence_get(struct xe_user_fence *ufence)
+{
+	user_fence_get(ufence);
+
+	return ufence;
+}
+
 /**
  * xe_sync_ufence_get() - Get user fence from sync
  * @sync: input sync

drivers/gpu/drm/xe/xe_sync.h

@@ -37,6 +37,7 @@ static inline bool xe_sync_is_ufence(struct xe_sync_entry *sync)
 	return !!sync->ufence;
 }
 
+struct xe_user_fence *__xe_sync_ufence_get(struct xe_user_fence *ufence);
 struct xe_user_fence *xe_sync_ufence_get(struct xe_sync_entry *sync);
 void xe_sync_ufence_put(struct xe_user_fence *ufence);
 int xe_sync_ufence_get_status(struct xe_user_fence *ufence);

drivers/gpu/drm/xe/xe_vm.c

@@ -1798,17 +1798,10 @@ xe_vm_bind(struct xe_vm *vm, struct xe_vma *vma, struct xe_exec_queue *q,
 {
 	struct dma_fence *fence;
 	struct xe_exec_queue *wait_exec_queue = to_wait_exec_queue(vm, q);
-	struct xe_user_fence *ufence;
 
 	xe_vm_assert_held(vm);
 	xe_bo_assert_held(bo);
 
-	ufence = find_ufence_get(syncs, num_syncs);
-	if (vma->ufence && ufence)
-		xe_sync_ufence_put(vma->ufence);
-
-	vma->ufence = ufence ?: vma->ufence;
-
 	if (immediate) {
 		fence = xe_vm_bind_vma(vma, q, syncs, num_syncs, tile_mask,
 				       first_op, last_op);
@@ -2817,20 +2810,57 @@ static struct dma_fence *ops_execute(struct xe_vm *vm,
 	return fence;
 }
 
+static void vma_add_ufence(struct xe_vma *vma, struct xe_user_fence *ufence)
+{
+	if (vma->ufence)
+		xe_sync_ufence_put(vma->ufence);
+	vma->ufence = __xe_sync_ufence_get(ufence);
+}
+
+static void op_add_ufence(struct xe_vm *vm, struct xe_vma_op *op,
+			  struct xe_user_fence *ufence)
+{
+	switch (op->base.op) {
+	case DRM_GPUVA_OP_MAP:
+		vma_add_ufence(op->map.vma, ufence);
+		break;
+	case DRM_GPUVA_OP_REMAP:
+		if (op->remap.prev)
+			vma_add_ufence(op->remap.prev, ufence);
+		if (op->remap.next)
+			vma_add_ufence(op->remap.next, ufence);
+		break;
+	case DRM_GPUVA_OP_UNMAP:
+		break;
+	case DRM_GPUVA_OP_PREFETCH:
+		vma_add_ufence(gpuva_to_vma(op->base.prefetch.va), ufence);
+		break;
+	default:
+		drm_warn(&vm->xe->drm, "NOT POSSIBLE");
+	}
+}
+
 static void vm_bind_ioctl_ops_fini(struct xe_vm *vm, struct xe_vma_ops *vops,
 				   struct dma_fence *fence)
 {
 	struct xe_exec_queue *wait_exec_queue = to_wait_exec_queue(vm, vops->q);
+	struct xe_user_fence *ufence;
 	struct xe_vma_op *op;
 	int i;
 
+	ufence = find_ufence_get(vops->syncs, vops->num_syncs);
 	list_for_each_entry(op, &vops->list, link) {
+		if (ufence)
+			op_add_ufence(vm, op, ufence);
+
 		if (op->base.op == DRM_GPUVA_OP_UNMAP)
 			xe_vma_destroy(gpuva_to_vma(op->base.unmap.va), fence);
 		else if (op->base.op == DRM_GPUVA_OP_REMAP)
 			xe_vma_destroy(gpuva_to_vma(op->base.remap.unmap->va),
 				       fence);
 	}
+	if (ufence)
+		xe_sync_ufence_put(ufence);
 	for (i = 0; i < vops->num_syncs; i++)
 		xe_sync_entry_signal(vops->syncs + i, fence);
 	xe_exec_queue_last_fence_set(wait_exec_queue, vm, fence);