[PATCH 8/8] drm/vram-helper: Simplify vmap implementation

[Thomas Zimmermann]

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 at suse.de>
---
 drivers/gpu/drm/drm_gem_vram_helper.c | 57 +++++++++++----------------
 1 file changed, 23 insertions(+), 34 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index a44718dd66cb..10d89c01990f 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);
 
@@ -442,8 +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);
 
@@ -471,7 +460,7 @@ int drm_gem_vram_vmap_unlocked(struct drm_gem_vram_object *gbo, struct dma_buf_m
 	if (ret)
 		return ret;
 
-	ret = drm_gem_vram_kmap_locked(gbo, map);
+	ret = drm_gem_vram_vmap(gbo, map);
 	if (ret)
 		goto err_ttm_bo_unreserve;
 
@@ -494,7 +483,7 @@ EXPORT_SYMBOL(drm_gem_vram_vmap_unlocked);
  */
 void drm_gem_vram_vunmap_unlocked(struct drm_gem_vram_object *gbo, struct dma_buf_map *map)
 {
-	drm_gem_vram_kunmap_locked(gbo, map);
+	drm_gem_vram_vunmap(gbo, map);
 	ttm_bo_unreserve(&gbo->bo);
 }
 EXPORT_SYMBOL(drm_gem_vram_vunmap_unlocked);
-- 
2.29.2