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[v2,6/7] drm/vram-helper: Simplify vmap implementation

Message ID 20201203140259.26580-7-tzimmermann@suse.de (mailing list archive)
State New, archived
Headers show
Series drm/vram-helper: Lock GEM BOs while they are mapped | expand

Commit Message

Thomas Zimmermann Dec. 3, 2020, 2:02 p.m. UTC 
After removing the pinning operations, the vmap/vunmap code as been
reduced to what used to be an internal helper. Inline the helper to
simplify the implementation.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/drm_gem_vram_helper.c | 52 +++++++++++----------------
 1 file changed, 20 insertions(+), 32 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index 276e8f8ea663..6159f5dc8f1f 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -378,36 +378,6 @@  int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo)
 }
 EXPORT_SYMBOL(drm_gem_vram_unpin);
 
-static int drm_gem_vram_kmap_locked(struct drm_gem_vram_object *gbo,
-				    struct dma_buf_map *map)
-{
-	int ret;
-
-	ret = ttm_bo_vmap(&gbo->bo, &gbo->map);
-	if (ret)
-		return ret;
-
-	*map = gbo->map;
-
-	return 0;
-}
-
-static void drm_gem_vram_kunmap_locked(struct drm_gem_vram_object *gbo,
-				       struct dma_buf_map *map)
-{
-	struct drm_device *dev = gbo->bo.base.dev;
-
-	if (drm_WARN_ON_ONCE(dev, !dma_buf_map_is_equal(&gbo->map, map)))
-		return; /* BUG: map not mapped from this BO */
-
-	/*
-	 * Permanently mapping and unmapping buffers adds overhead from
-	 * updating the page tables and creates debugging output. Therefore,
-	 * we delay the actual unmap operation until the BO gets evicted
-	 * from memory. See drm_gem_vram_bo_driver_move_notify().
-	 */
-}
-
 /**
  * drm_gem_vram_vmap() - Pins and maps a GEM VRAM object into kernel address
  *                       space
@@ -426,9 +396,17 @@  static void drm_gem_vram_kunmap_locked(struct drm_gem_vram_object *gbo,
  */
 int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map)
 {
+	int ret;
+
 	dma_resv_assert_held(gbo->bo.base.resv);
 
-	return drm_gem_vram_kmap_locked(gbo, map);
+	ret = ttm_bo_vmap(&gbo->bo, &gbo->map);
+	if (ret)
+		return ret;
+
+	*map = gbo->map;
+
+	return 0;
 }
 EXPORT_SYMBOL(drm_gem_vram_vmap);
 
@@ -442,9 +420,19 @@  EXPORT_SYMBOL(drm_gem_vram_vmap);
  */
 void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map)
 {
+	struct drm_device *dev = gbo->bo.base.dev;
+
 	dma_resv_assert_held(gbo->bo.base.resv);
 
-	drm_gem_vram_kunmap_locked(gbo, map);
+	if (drm_WARN_ON_ONCE(dev, !dma_buf_map_is_equal(&gbo->map, map)))
+		return; /* BUG: map not mapped from this BO */
+
+	/*
+	 * Permanently mapping and unmapping buffers adds overhead from
+	 * updating the page tables and creates debugging output. Therefore,
+	 * we delay the actual unmap operation until the BO gets evicted
+	 * from memory. See drm_gem_vram_bo_driver_move_notify().
+	 */
 }
 EXPORT_SYMBOL(drm_gem_vram_vunmap);