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drm/exynos: added a feature to get gem buffer information. 

this patch adds a feature to get a gem buffer information and user application
can get the gem buffer information simply in runtime through gem handle.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Inki Dae 2012-05-04 15:51:17 +09:00
parent b2df26c10b
commit 40cd7e0c02
4 changed files with 51 additions and 0 deletions
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2
drivers/gpu/drm/exynos/exynos_drm_drv.c
View File

@ -211,6 +211,8 @@ static struct drm_ioctl_desc exynos_ioctls[] = {
DRM_AUTH),
DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET,
exynos_drm_gem_get_ioctl, DRM_UNLOCKED),
DRM_IOCTL_DEF_DRV(EXYNOS_PLANE_SET_ZPOS, exynos_plane_set_zpos_ioctl,
DRM_UNLOCKED | DRM_AUTH),
DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,

26
drivers/gpu/drm/exynos/exynos_drm_gem.c
View File

@ -604,6 +604,32 @@ int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
return 0;
}
int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{ struct exynos_drm_gem_obj *exynos_gem_obj;
struct drm_exynos_gem_info *args = data;
struct drm_gem_object *obj;
mutex_lock(&dev->struct_mutex);
obj = drm_gem_object_lookup(dev, file_priv, args->handle);
if (!obj) {
DRM_ERROR("failed to lookup gem object.\n");
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
exynos_gem_obj = to_exynos_gem_obj(obj);
args->flags = exynos_gem_obj->flags;
args->size = exynos_gem_obj->size;
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
return 0;
}
int exynos_drm_gem_init_object(struct drm_gem_object *obj)
{
DRM_DEBUG_KMS("%s\n", __FILE__);

4
drivers/gpu/drm/exynos/exynos_drm_gem.h
View File

@ -127,6 +127,10 @@ int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/* get buffer information to memory region allocated by gem. */
int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/* initialize gem object. */
int exynos_drm_gem_init_object(struct drm_gem_object *obj);

19
include/drm/exynos_drm.h
View File

@ -74,6 +74,21 @@ struct drm_exynos_gem_mmap {
uint64_t mapped;
};
/**
* A structure to gem information.
*
* @handle: a handle to gem object created.
* @flags: flag value including memory type and cache attribute and
* this value would be set by driver.
* @size: size to memory region allocated by gem and this size would
* be set by driver.
*/
struct drm_exynos_gem_info {
unsigned int handle;
unsigned int flags;
uint64_t size;
};
/**
* A structure for user connection request of virtual display.
*
@ -113,6 +128,7 @@ enum e_drm_exynos_gem_mem_type {
#define DRM_EXYNOS_GEM_MAP_OFFSET 0x01
#define DRM_EXYNOS_GEM_MMAP 0x02
/* Reserved 0x03 ~ 0x05 for exynos specific gem ioctl */
#define DRM_EXYNOS_GEM_GET 0x04
#define DRM_EXYNOS_PLANE_SET_ZPOS 0x06
#define DRM_EXYNOS_VIDI_CONNECTION 0x07
@ -125,6 +141,9 @@ enum e_drm_exynos_gem_mem_type {
#define DRM_IOCTL_EXYNOS_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + \
DRM_EXYNOS_GEM_MMAP, struct drm_exynos_gem_mmap)
#define DRM_IOCTL_EXYNOS_GEM_GET DRM_IOWR(DRM_COMMAND_BASE + \
DRM_EXYNOS_GEM_GET, struct drm_exynos_gem_info)
#define DRM_IOCTL_EXYNOS_PLANE_SET_ZPOS DRM_IOWR(DRM_COMMAND_BASE + \
DRM_EXYNOS_PLANE_SET_ZPOS, struct drm_exynos_plane_set_zpos)