drm: use common drm_gem_dmabuf_release in i915/exynos drivers

Note that this is slightly tricky since both drivers store their
native objects in dma_buf->priv. But both also embed the base
drm_gem_object at the first position, so the implicit cast is ok.

To use the release helper we need to export it, too.

Cc: Inki Dae <inki.dae@samsung.com>
Cc: Intel Graphics Development <intel-gfx@lists.freedesktop.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index 85e450e..a35f206 100644 (file)
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -192,7 +192,7 @@ static void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
        /* nothing to be done here */
 }
 
-static void drm_gem_dmabuf_release(struct dma_buf *dma_buf)
+void drm_gem_dmabuf_release(struct dma_buf *dma_buf)
 {
        struct drm_gem_object *obj = dma_buf->priv;
 
@@ -202,6 +202,7 @@ static void drm_gem_dmabuf_release(struct dma_buf *dma_buf)
                drm_gem_object_unreference_unlocked(obj);
        }
 }
+EXPORT_SYMBOL(drm_gem_dmabuf_release);
 
 static void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf)
 {

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
index a0f997e..3cd56e1 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
@@ -127,27 +127,6 @@ static void exynos_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
        /* Nothing to do. */
 }
 
-static void exynos_dmabuf_release(struct dma_buf *dmabuf)
-{
-       struct exynos_drm_gem_obj *exynos_gem_obj = dmabuf->priv;
-
-       /*
-        * exynos_dmabuf_release() call means that file object's
-        * f_count is 0 and it calls drm_gem_object_handle_unreference()
-        * to drop the references that these values had been increased
-        * at drm_prime_handle_to_fd()
-        */
-       if (exynos_gem_obj->base.export_dma_buf == dmabuf) {
-               exynos_gem_obj->base.export_dma_buf = NULL;
-
-               /*
-                * drop this gem object refcount to release allocated buffer
-                * and resources.
-                */
-               drm_gem_object_unreference_unlocked(&exynos_gem_obj->base);
-       }
-}
-
 static void *exynos_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf,
                                                unsigned long page_num)
 {
@@ -193,7 +172,7 @@ static struct dma_buf_ops exynos_dmabuf_ops = {
        .kunmap                 = exynos_gem_dmabuf_kunmap,
        .kunmap_atomic          = exynos_gem_dmabuf_kunmap_atomic,
        .mmap                   = exynos_gem_dmabuf_mmap,
-       .release                = exynos_dmabuf_release,
+       .release                = drm_gem_dmabuf_release,
 };
 
 struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev,

diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
index f2e185c..63ee1a9 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
@@ -90,17 +90,6 @@ static void i915_gem_unmap_dma_buf(struct dma_buf_attachment *attachment,
        kfree(sg);
 }
 
-static void i915_gem_dmabuf_release(struct dma_buf *dma_buf)
-{
-       struct drm_i915_gem_object *obj = dma_buf->priv;
-
-       if (obj->base.export_dma_buf == dma_buf) {
-               /* drop the reference on the export fd holds */
-               obj->base.export_dma_buf = NULL;
-               drm_gem_object_unreference_unlocked(&obj->base);
-       }
-}
-
 static void *i915_gem_dmabuf_vmap(struct dma_buf *dma_buf)
 {
        struct drm_i915_gem_object *obj = dma_buf->priv;
@@ -211,7 +200,7 @@ static int i915_gem_begin_cpu_access(struct dma_buf *dma_buf, size_t start, size
 static const struct dma_buf_ops i915_dmabuf_ops =  {
        .map_dma_buf = i915_gem_map_dma_buf,
        .unmap_dma_buf = i915_gem_unmap_dma_buf,
-       .release = i915_gem_dmabuf_release,
+       .release = drm_gem_dmabuf_release,
        .kmap = i915_gem_dmabuf_kmap,
        .kmap_atomic = i915_gem_dmabuf_kmap_atomic,
        .kunmap = i915_gem_dmabuf_kunmap,

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 91f343c..5ebed3e 100644 (file)
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1478,6 +1478,7 @@ extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
                struct dma_buf *dma_buf);
 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
                struct drm_file *file_priv, int prime_fd, uint32_t *handle);
+extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
 
 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
                                        struct drm_file *file_priv);