diff --git a/dlls/wined3d/buffer.c b/dlls/wined3d/buffer.c
index 9d22a909fb6..4c5e2054fe0 100644
--- a/dlls/wined3d/buffer.c
+++ b/dlls/wined3d/buffer.c
@@ -1063,7 +1063,7 @@ static void wined3d_buffer_init_data(struct wined3d_buffer *buffer,
     if (buffer->flags & WINED3D_BUFFER_USE_BO)
     {
         wined3d_box_set(&box, 0, 0, resource->size, 1, 0, 1);
-        device->cs->c.ops->update_sub_resource(&device->cs->c, resource,
+        wined3d_device_context_emit_update_sub_resource(&device->cs->c, resource,
                 0, &box, data->data, data->row_pitch, data->slice_pitch);
     }
     else
diff --git a/dlls/wined3d/cs.c b/dlls/wined3d/cs.c
index 47bc36d4cc0..700ff17ee96 100644
--- a/dlls/wined3d/cs.c
+++ b/dlls/wined3d/cs.c
@@ -2649,6 +2649,40 @@ done:
     wined3d_resource_release(resource);
 }
 
+void wined3d_device_context_emit_update_sub_resource(struct wined3d_device_context *context,
+        struct wined3d_resource *resource, unsigned int sub_resource_idx, const struct wined3d_box *box,
+        const void *data, unsigned int row_pitch, unsigned int slice_pitch)
+{
+    struct wined3d_const_bo_address src_addr;
+    void *map_ptr;
+
+    if ((map_ptr = context->ops->prepare_upload_bo(context, resource, sub_resource_idx, box,
+            row_pitch, slice_pitch, WINED3D_MAP_WRITE, &src_addr)))
+    {
+        struct wined3d_cs_update_sub_resource *op;
+
+        wined3d_format_copy_data(resource->format, data, row_pitch, slice_pitch, map_ptr, row_pitch, slice_pitch,
+                box->right - box->left, box->bottom - box->top, box->back - box->front);
+
+        op = wined3d_device_context_require_space(context, sizeof(*op), WINED3D_CS_QUEUE_DEFAULT);
+        op->opcode = WINED3D_CS_OP_UPDATE_SUB_RESOURCE;
+        op->resource = resource;
+        op->sub_resource_idx = sub_resource_idx;
+        op->box = *box;
+        op->addr = src_addr;
+        op->row_pitch = row_pitch;
+        op->slice_pitch = slice_pitch;
+
+        wined3d_device_context_acquire_resource(context, resource);
+
+        wined3d_device_context_submit(context, WINED3D_CS_QUEUE_DEFAULT);
+    }
+    else
+    {
+        context->ops->update_sub_resource(context, resource, sub_resource_idx, box, data, row_pitch, slice_pitch);
+    }
+}
+
 static void wined3d_cs_update_sub_resource(struct wined3d_device_context *context,
         struct wined3d_resource *resource, unsigned int sub_resource_idx, const struct wined3d_box *box,
         const void *data, unsigned int row_pitch, unsigned int slice_pitch)
@@ -2946,12 +2980,21 @@ static void wined3d_cs_st_finish(struct wined3d_device_context *context, enum wi
 {
 }
 
+static void *wined3d_cs_prepare_upload_bo(struct wined3d_device_context *context, struct wined3d_resource *resource,
+        unsigned int sub_resource_idx, const struct wined3d_box *box, unsigned int row_pitch,
+        unsigned int slice_pitch, uint32_t flags, struct wined3d_const_bo_address *address)
+{
+    /* FIXME: We would like to return mapped or newly allocated memory here. */
+    return NULL;
+}
+
 static const struct wined3d_device_context_ops wined3d_cs_st_ops =
 {
     wined3d_cs_st_require_space,
     wined3d_cs_st_submit,
     wined3d_cs_st_finish,
     wined3d_cs_st_push_constants,
+    wined3d_cs_prepare_upload_bo,
     wined3d_cs_map,
     wined3d_cs_unmap,
     wined3d_cs_update_sub_resource,
@@ -3080,6 +3123,7 @@ static const struct wined3d_device_context_ops wined3d_cs_mt_ops =
     wined3d_cs_mt_submit,
     wined3d_cs_mt_finish,
     wined3d_cs_mt_push_constants,
+    wined3d_cs_prepare_upload_bo,
     wined3d_cs_map,
     wined3d_cs_unmap,
     wined3d_cs_update_sub_resource,
@@ -3353,6 +3397,15 @@ static void wined3d_deferred_context_push_constants(struct wined3d_device_contex
     FIXME("context %p, p %#x, start_idx %u, count %u, constants %p, stub!\n", context, p, start_idx, count, constants);
 }
 
+static void *wined3d_deferred_context_prepare_upload_bo(struct wined3d_device_context *context,
+        struct wined3d_resource *resource, unsigned int sub_resource_idx, const struct wined3d_box *box,
+        unsigned int row_pitch, unsigned int slice_pitch, uint32_t flags, struct wined3d_const_bo_address *address)
+{
+    FIXME("context %p, resource %p, sub_resource_idx %u, box %p, flags %#x, address %p, stub!\n",
+            context, resource, sub_resource_idx, box, flags, address);
+    return NULL;
+}
+
 static HRESULT wined3d_deferred_context_map(struct wined3d_device_context *context, struct wined3d_resource *resource,
         unsigned int sub_resource_idx, void **map_ptr, const struct wined3d_box *box, unsigned int flags)
 {
@@ -3430,6 +3483,7 @@ static const struct wined3d_device_context_ops wined3d_deferred_context_ops =
     wined3d_deferred_context_submit,
     wined3d_deferred_context_finish,
     wined3d_deferred_context_push_constants,
+    wined3d_deferred_context_prepare_upload_bo,
     wined3d_deferred_context_map,
     wined3d_deferred_context_unmap,
     wined3d_deferred_context_update_sub_resource,
diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index 701041962e5..ce618b594de 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -4681,7 +4681,8 @@ void CDECL wined3d_device_context_update_sub_resource(struct wined3d_device_cont
         return;
     }
 
-    context->ops->update_sub_resource(context, resource, sub_resource_idx, box, data, row_pitch, depth_pitch);
+    wined3d_device_context_emit_update_sub_resource(context, resource,
+            sub_resource_idx, box, data, row_pitch, depth_pitch);
 }
 
 void CDECL wined3d_device_context_resolve_sub_resource(struct wined3d_device_context *context,
diff --git a/dlls/wined3d/texture.c b/dlls/wined3d/texture.c
index 62f38a1d592..c1247fbc56b 100644
--- a/dlls/wined3d/texture.c
+++ b/dlls/wined3d/texture.c
@@ -4350,7 +4350,7 @@ HRESULT CDECL wined3d_texture_create(struct wined3d_device *device, const struct
         for (i = 0; i < sub_count; ++i)
         {
             wined3d_texture_get_level_box(*texture, i % (*texture)->level_count, &box);
-            device->cs->c.ops->update_sub_resource(&device->cs->c, &(*texture)->resource,
+            wined3d_device_context_emit_update_sub_resource(&device->cs->c, &(*texture)->resource,
                     i, &box, data[i].data, data[i].row_pitch, data[i].slice_pitch);
         }
     }
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index c70b0f7c338..83a0a48471b 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -4704,6 +4704,9 @@ struct wined3d_device_context_ops
     void (*finish)(struct wined3d_device_context *context, enum wined3d_cs_queue_id queue_id);
     void (*push_constants)(struct wined3d_device_context *context, enum wined3d_push_constants p,
             unsigned int start_idx, unsigned int count, const void *constants);
+    void *(*prepare_upload_bo)(struct wined3d_device_context *context, struct wined3d_resource *resource,
+            unsigned int sub_resource_idx, const struct wined3d_box *box, unsigned int row_pitch,
+            unsigned int slice_pitch, uint32_t flags, struct wined3d_const_bo_address *address);
     HRESULT (*map)(struct wined3d_device_context *context, struct wined3d_resource *resource,
             unsigned int sub_resource_idx, void **map_ptr, const struct wined3d_box *box, unsigned int flags);
     HRESULT (*unmap)(struct wined3d_device_context *context, struct wined3d_resource *resource,
@@ -4855,6 +4858,9 @@ void wined3d_device_context_emit_set_vertex_declaration(struct wined3d_device_co
         struct wined3d_vertex_declaration *declaration) DECLSPEC_HIDDEN;
 void wined3d_device_context_emit_set_viewports(struct wined3d_device_context *context, unsigned int viewport_count,
         const struct wined3d_viewport *viewports) DECLSPEC_HIDDEN;
+void wined3d_device_context_emit_update_sub_resource(struct wined3d_device_context *context,
+        struct wined3d_resource *resource, unsigned int sub_resource_idx, const struct wined3d_box *box,
+        const void *data, unsigned int row_pitch, unsigned int slice_pitch) DECLSPEC_HIDDEN;
 
 static inline void wined3d_resource_wait_idle(struct wined3d_resource *resource)
 {