drm/vram: Add infrastructure for move_notify()

This patch prepares VRAM helpers for lazy unmapping of buffer objects.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reported-and-tested-by: Davidlohr Bueso <dbueso@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20190906122056.32018-4-tzimmermann@suse.de

diff --git a/drivers/gpu/drm/drm_vram_mm_helper.c b/drivers/gpu/drm/drm_vram_mm_helper.c
index c911781d67284bda9b5d4f2322f63acfa9bf1bed..31984690d5f32eaa151629f957bd6fa87b82ddcc 100644 (file)
--- a/drivers/gpu/drm/drm_vram_mm_helper.c
+++ b/drivers/gpu/drm/drm_vram_mm_helper.c
@@ -98,6 +98,17 @@ static int bo_driver_verify_access(struct ttm_buffer_object *bo,
        return vmm->funcs->verify_access(bo, filp);
 }
 
+static void bo_driver_move_notify(struct ttm_buffer_object *bo,
+                                 bool evict,
+                                 struct ttm_mem_reg *new_mem)
+{
+       struct drm_vram_mm *vmm = drm_vram_mm_of_bdev(bo->bdev);
+
+       if (!vmm->funcs || !vmm->funcs->move_notify)
+               return;
+       vmm->funcs->move_notify(bo, evict, new_mem);
+}
+
 static int bo_driver_io_mem_reserve(struct ttm_bo_device *bdev,
                                    struct ttm_mem_reg *mem)
 {
@@ -140,6 +151,7 @@ static struct ttm_bo_driver bo_driver = {
        .eviction_valuable = ttm_bo_eviction_valuable,
        .evict_flags = bo_driver_evict_flags,
        .verify_access = bo_driver_verify_access,
+       .move_notify = bo_driver_move_notify,
        .io_mem_reserve = bo_driver_io_mem_reserve,
        .io_mem_free = bo_driver_io_mem_free,
 };

diff --git a/include/drm/drm_vram_mm_helper.h b/include/drm/drm_vram_mm_helper.h
index 2aacfb1ccfae40a20d03110a8a98e17dcd8c912e..7fb8700f45fe1cb7d62c187526eb2cc4fbd80505 100644 (file)
--- a/include/drm/drm_vram_mm_helper.h
+++ b/include/drm/drm_vram_mm_helper.h
@@ -15,6 +15,8 @@ struct drm_device;
        &ttm_bo_driver.evict_flags
  * @verify_access:     Provides an implementation for \
        struct &ttm_bo_driver.verify_access
+ * @move_notify:       Provides an implementation for
+ *                     struct &ttm_bo_driver.move_notify
  *
  * These callback function integrate VRAM MM with TTM buffer objects. New
  * functions can be added if necessary.
@@ -23,6 +25,8 @@ struct drm_vram_mm_funcs {
        void (*evict_flags)(struct ttm_buffer_object *bo,
                            struct ttm_placement *placement);
        int (*verify_access)(struct ttm_buffer_object *bo, struct file *filp);
+       void (*move_notify)(struct ttm_buffer_object *bo, bool evict,
+                           struct ttm_mem_reg *new_mem);
 };
 
 /**