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drm: Add simple PRIME helpers for GEM VRAM

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These basic helper functions for GEM VRAM allow for pinning and mapping
GEM VRAM objects via the PRIME interfaces. It's not a full implementation,
but complete enough for generic fbcon.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: http://patchwork.freedesktop.org/patch/msgid/20190508082630.15116-6-tzimmermann@suse.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Thomas Zimmermann
2019-05-08 10:26:15 +02:00
committed by Gerd Hoffmann
parent fed1eec080
commit 1f460b4978
2 changed files with 118 additions and 0 deletions
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20
include/drm/drm_gem_vram_helper.h
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@@ -116,5 +116,25 @@ void drm_gem_vram_driver_gem_free_object_unlocked(struct drm_gem_object *gem);
int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
struct drm_device *dev,
uint32_t handle, uint64_t *offset);
/*
* PRIME helpers for struct drm_driver
*/
int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj);
void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj);
void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *obj);
void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *obj,
void *vaddr);
int drm_gem_vram_driver_gem_prime_mmap(struct drm_gem_object *obj,
struct vm_area_struct *vma);
#define DRM_GEM_VRAM_DRIVER_PRIME \
.gem_prime_export = drm_gem_prime_export, \
.gem_prime_import = drm_gem_prime_import, \
.gem_prime_pin = drm_gem_vram_driver_gem_prime_pin, \
.gem_prime_unpin = drm_gem_vram_driver_gem_prime_unpin, \
.gem_prime_vmap = drm_gem_vram_driver_gem_prime_vmap, \
.gem_prime_vunmap = drm_gem_vram_driver_gem_prime_vunmap, \
.gem_prime_mmap = drm_gem_vram_driver_gem_prime_mmap
#endif