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authorAaron Plattner <aplattner@nvidia.com>2013-01-16 00:47:42 +0400
committerDave Airlie <airlied@redhat.com>2013-02-08 07:39:08 +0400
commit89177644a7b6306e6084a89eab7e290f4bfef397 (patch)
treee8bac93d626a14df07b2d904797c5d0e86f6251a /include/drm
parent6504d0d9900a2c05ea1fbab2ec008bf442993d94 (diff)
downloadlinux-89177644a7b6306e6084a89eab7e290f4bfef397.tar.xz
drm: add prime helpers
Instead of reimplementing all of the dma_buf functionality in every driver, create helpers drm_prime_import and drm_prime_export that implement them in terms of new, lower-level hook functions: gem_prime_pin: callback when a buffer is created, used to pin buffers into GTT gem_prime_get_sg_table: convert a drm_gem_object to an sg_table for export gem_prime_import_sg_table: convert an sg_table into a drm_gem_object gem_prime_vmap, gem_prime_vunmap: map and unmap an object These hooks are optional; drivers can opt in by using drm_gem_prime_import and drm_gem_prime_export as the .gem_prime_import and .gem_prime_export fields of struct drm_driver. v2: - Drop .begin_cpu_access. None of the drivers this code replaces implemented it. Having it here was a leftover from when I was trying to include i915 in this rework. - Use mutex_lock instead of mutex_lock_interruptible, as these three drivers did. This patch series shouldn't change that behavior. - Rename helpers to gem_prime_get_sg_table and gem_prime_import_sg_table. Rename struct sg_table* variables to 'sgt' for clarity. - Update drm.tmpl for these new hooks. v3: - Pass the vaddr down to the driver. This lets drivers that just call vunmap on the pointer avoid having to store the pointer in their GEM private structures. - Move documentation into a /** DOC */ comment in drm_prime.c and include it in drm.tmpl with a !P line. I tried to use !F lines to include documentation of the individual functions from drmP.h, but the docproc / kernel-doc scripts barf on that file, so hopefully this is good enough for now. - apply refcount fix from commit be8a42ae60addd8b6092535c11b42d099d6470ec ("drm/prime: drop reference on imported dma-buf come from gem") Signed-off-by: Aaron Plattner <aplattner@nvidia.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drmP.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 3aaa50d64451..2d94d7413d71 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -930,6 +930,14 @@ struct drm_driver {
/* import dmabuf -> GEM */
struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
struct dma_buf *dma_buf);
+ /* low-level interface used by drm_gem_prime_{import,export} */
+ int (*gem_prime_pin)(struct drm_gem_object *obj);
+ struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
+ struct drm_gem_object *(*gem_prime_import_sg_table)(
+ struct drm_device *dev, size_t size,
+ struct sg_table *sgt);
+ void *(*gem_prime_vmap)(struct drm_gem_object *obj);
+ void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
/* vga arb irq handler */
void (*vgaarb_irq)(struct drm_device *dev, bool state);
@@ -1562,9 +1570,13 @@ extern int drm_clients_info(struct seq_file *m, void* data);
extern int drm_gem_name_info(struct seq_file *m, void *data);
+extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
+ struct drm_gem_object *obj, int flags);
extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
struct drm_file *file_priv, uint32_t handle, uint32_t flags,
int *prime_fd);
+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);