drm/xe: Use xe_vma_ops to implement xe_vm_rebind

All page tables updates are moving to a xe_vma_ops interface to
implement 1 job per VM bind IOCTL. Convert xe_vm_rebind to use a
xe_vma_ops based interface.
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Oak Zeng <oak.zeng@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240425045513.1913039-6-matthew.brost@intel.com

drivers/gpu/drm/xe/xe_vm.c

@@ -712,37 +712,87 @@ int xe_vm_userptr_check_repin(struct xe_vm *vm)
 		list_empty_careful(&vm->userptr.invalidated)) ? 0 : -EAGAIN;
 }
 
-static struct dma_fence *
-xe_vm_bind_vma(struct xe_vma *vma, struct xe_exec_queue *q,
-	       struct xe_sync_entry *syncs, u32 num_syncs,
-	       bool first_op, bool last_op);
+static void xe_vm_populate_rebind(struct xe_vma_op *op, struct xe_vma *vma,
+				  u8 tile_mask)
+{
+	INIT_LIST_HEAD(&op->link);
+	op->base.op = DRM_GPUVA_OP_MAP;
+	op->base.map.va.addr = vma->gpuva.va.addr;
+	op->base.map.va.range = vma->gpuva.va.range;
+	op->base.map.gem.obj = vma->gpuva.gem.obj;
+	op->base.map.gem.offset = vma->gpuva.gem.offset;
+	op->map.vma = vma;
+	op->map.immediate = true;
+	op->map.dumpable = vma->gpuva.flags & XE_VMA_DUMPABLE;
+	op->map.is_null = xe_vma_is_null(vma);
+}
+
+static int xe_vm_ops_add_rebind(struct xe_vma_ops *vops, struct xe_vma *vma,
+				u8 tile_mask)
+{
+	struct xe_vma_op *op;
+
+	op = kzalloc(sizeof(*op), GFP_KERNEL);
+	if (!op)
+		return -ENOMEM;
+
+	xe_vm_populate_rebind(op, vma, tile_mask);
+	list_add_tail(&op->link, &vops->list);
+
+	return 0;
+}
+
+static struct dma_fence *ops_execute(struct xe_vm *vm,
+				     struct xe_vma_ops *vops,
+				     bool cleanup);
+static void xe_vma_ops_init(struct xe_vma_ops *vops);
 
 int xe_vm_rebind(struct xe_vm *vm, bool rebind_worker)
 {
 	struct dma_fence *fence;
 	struct xe_vma *vma, *next;
+	struct xe_vma_ops vops;
+	struct xe_vma_op *op, *next_op;
+	int err;
 
 	lockdep_assert_held(&vm->lock);
-	if (xe_vm_in_lr_mode(vm) && !rebind_worker)
+	if ((xe_vm_in_lr_mode(vm) && !rebind_worker) ||
+	    list_empty(&vm->rebind_list))
 		return 0;
 
+	xe_vma_ops_init(&vops);
+
 	xe_vm_assert_held(vm);
-	list_for_each_entry_safe(vma, next, &vm->rebind_list,
-				 combined_links.rebind) {
+	list_for_each_entry(vma, &vm->rebind_list, combined_links.rebind) {
 		xe_assert(vm->xe, vma->tile_present);
 
-		list_del_init(&vma->combined_links.rebind);
 		if (rebind_worker)
 			trace_xe_vma_rebind_worker(vma);
 		else
 			trace_xe_vma_rebind_exec(vma);
-		fence = xe_vm_bind_vma(vma, NULL, NULL, 0, false, false);
-		if (IS_ERR(fence))
-			return PTR_ERR(fence);
+
+		err = xe_vm_ops_add_rebind(&vops, vma,
+					   vma->tile_present);
+		if (err)
+			goto free_ops;
+	}
+
+	fence = ops_execute(vm, &vops, false);
+	if (IS_ERR(fence)) {
+		err = PTR_ERR(fence);
+	} else {
 		dma_fence_put(fence);
+		list_for_each_entry_safe(vma, next, &vm->rebind_list,
+					 combined_links.rebind)
+			list_del_init(&vma->combined_links.rebind);
+	}
+free_ops:
+	list_for_each_entry_safe(op, next_op, &vops.list, link) {
+		list_del(&op->link);
+		kfree(op);
 	}
 
-	return 0;
+	return err;
 }
 
 static void xe_vma_free(struct xe_vma *vma)
@@ -2414,7 +2464,7 @@ static struct dma_fence *op_execute(struct xe_vm *vm, struct xe_vma *vma,
 {
 	struct dma_fence *fence = NULL;
 
-	lockdep_assert_held_write(&vm->lock);
+	lockdep_assert_held(&vm->lock);
 
 	xe_vm_assert_held(vm);
 	xe_bo_assert_held(xe_vma_bo(vma));
@@ -2533,7 +2583,7 @@ xe_vma_op_execute(struct xe_vm *vm, struct xe_vma_op *op)
 {
 	struct dma_fence *fence = ERR_PTR(-ENOMEM);
 
-	lockdep_assert_held_write(&vm->lock);
+	lockdep_assert_held(&vm->lock);
 
 	switch (op->base.op) {
 	case DRM_GPUVA_OP_MAP: