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 at samsung.com>
---
drivers/gpu/drm/exynos/exynos_drm_drv.c | 2 ++
drivers/gpu/drm/exynos/exynos_drm_gem.c | 26 ++++++++++++++++++++++++++
drivers/gpu/drm/exynos/exynos_drm_gem.h | 4 ++++
include/drm/exynos_drm.h | 21 ++++++++++++++++++++-
4 files changed, 52 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c
b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 5bb0361..21658fa 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -213,6 +213,8 @@ static struct drm_ioctl_desc exynos_ioctls[] = {
exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
DRM_IOCTL_DEF_DRV(EXYNOS_GEM_USERPTR,
exynos_drm_gem_userptr_ioctl, DRM_UNLOCKED),
+ 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,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c
b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index b68d4ea..c3ffc9f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -864,6 +864,32 @@ err_free_buffer:
return ret;
}
+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__);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h
b/drivers/gpu/drm/exynos/exynos_drm_gem.h
index 1de2241..9f5eabe 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -138,6 +138,10 @@ int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void
*data,
int exynos_drm_gem_userptr_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);
diff --git a/include/drm/exynos_drm.h b/include/drm/exynos_drm.h
index 48eda6e..63e7ee8 100644
--- a/include/drm/exynos_drm.h
+++ b/include/drm/exynos_drm.h
@@ -92,6 +92,21 @@ struct drm_exynos_gem_userptr {
};
/**
+ * 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.
*
* @connection: indicate whether doing connetion or not by user.
@@ -132,7 +147,8 @@ enum e_drm_exynos_gem_mem_type {
#define DRM_EXYNOS_GEM_MAP_OFFSET 0x01
#define DRM_EXYNOS_GEM_MMAP 0x02
#define DRM_EXYNOS_GEM_USERPTR 0x03
-/* Reserved 0x03 ~ 0x05 for exynos specific gem ioctl */
+#define DRM_EXYNOS_GEM_GET 0x04
+/* Reserved 0x04 ~ 0x05 for exynos specific gem ioctl */
#define DRM_EXYNOS_PLANE_SET_ZPOS 0x06
#define DRM_EXYNOS_VIDI_CONNECTION 0x07
@@ -148,6 +164,9 @@ enum e_drm_exynos_gem_mem_type {
#define DRM_IOCTL_EXYNOS_GEM_USERPTR DRM_IOWR(DRM_COMMAND_BASE + \
DRM_EXYNOS_GEM_USERPTR, struct drm_exynos_gem_userptr)
+#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)
--
1.7.4.1
