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Commit f0b1bda7 authored by Inki Dae's avatar Inki Dae Committed by Dave Airlie
Browse files

drm/exynos: added new funtion to get/put dma address. 



this function would be used for drm based 2d acceleration driver
to get/put dma address through gem handle.
when exynos_drm_get_dma_address is called reference count of
gem object would be increased not to be released by gem close and
when exynos_drm_put_dma_address is called the reference count of
this gem object would be decreased to be released.

Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 2b35892e

drivers/gpu/drm/exynos/exynos_drm_gem.c

+58 −0
Original line number Diff line number Diff line
@@ -386,6 +386,64 @@ int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, 
	return 0;

}



void *exynos_drm_gem_get_dma_addr(struct drm_device *dev,

					unsigned int gem_handle,

					struct drm_file *file_priv)

{

	struct exynos_drm_gem_obj *exynos_gem_obj;

	struct drm_gem_object *obj;



	obj = drm_gem_object_lookup(dev, file_priv, gem_handle);

	if (!obj) {

		DRM_ERROR("failed to lookup gem object.\n");

		return ERR_PTR(-EINVAL);

	}



	exynos_gem_obj = to_exynos_gem_obj(obj);



	if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) {

		DRM_DEBUG_KMS("not support NONCONTIG type.\n");

		drm_gem_object_unreference_unlocked(obj);



		/* TODO */

		return ERR_PTR(-EINVAL);

	}



	return &exynos_gem_obj->buffer->dma_addr;

}



void exynos_drm_gem_put_dma_addr(struct drm_device *dev,

					unsigned int gem_handle,

					struct drm_file *file_priv)

{

	struct exynos_drm_gem_obj *exynos_gem_obj;

	struct drm_gem_object *obj;



	obj = drm_gem_object_lookup(dev, file_priv, gem_handle);

	if (!obj) {

		DRM_ERROR("failed to lookup gem object.\n");

		return;

	}



	exynos_gem_obj = to_exynos_gem_obj(obj);



	if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) {

		DRM_DEBUG_KMS("not support NONCONTIG type.\n");

		drm_gem_object_unreference_unlocked(obj);



		/* TODO */

		return;

	}



	drm_gem_object_unreference_unlocked(obj);



	/*

	 * decrease obj->refcount one more time because we has already

	 * increased it at exynos_drm_gem_get_dma_addr().

	 */

	drm_gem_object_unreference_unlocked(obj);

}



int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,

				    struct drm_file *file_priv)

{

drivers/gpu/drm/exynos/exynos_drm_gem.h

+18 −0
Original line number Diff line number Diff line
@@ -88,6 +88,24 @@ struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, 
int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,

				struct drm_file *file_priv);



/*

 * get dma address from gem handle and this function could be used for

 * other drivers such as 2d/3d acceleration drivers.

 * with this function call, gem object reference count would be increased.

 */

void *exynos_drm_gem_get_dma_addr(struct drm_device *dev,

					unsigned int gem_handle,

					struct drm_file *file_priv);



/*

 * put dma address from gem handle and this function could be used for

 * other drivers such as 2d/3d acceleration drivers.

 * with this function call, gem object reference count would be decreased.

 */

void exynos_drm_gem_put_dma_addr(struct drm_device *dev,

					unsigned int gem_handle,

					struct drm_file *file_priv);



/* get buffer offset to map to user space. */

int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,

				    struct drm_file *file_priv);