linux/drivers/gpu/drm/exynos/exynos_drm_buf.h
Prathyush K 465ed66060 drm/exynos: remove 'pages' and 'page_size' elements in exynos gem buffer
Changelog v2:

Removed redundant check for invalid sgl.
Added check for valid page_offset in the beginning of exynos_drm_gem_map_buf.

Changelog v1:

The 'pages' structure is not required since we can use the 'sgt'. Even for
CONTIG buffers, a SGT is created (which will have just one sgl). This SGT
can be used during mmap instead of 'pages'. The 'page_size' element of the
structure is also not used anywhere and is removed.
This patch also fixes a memory leak where the 'pages' structure was being
allocated during gem buffer allocation but not being freed during deallocate.

Signed-off-by: Prathyush K <prathyush.k@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-12-05 14:39:20 +09:00

48 lines
1.8 KiB
C

/* exynos_drm_buf.h
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Author: Inki Dae <inki.dae@samsung.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef _EXYNOS_DRM_BUF_H_
#define _EXYNOS_DRM_BUF_H_
/* create and initialize buffer object. */
struct exynos_drm_gem_buf *exynos_drm_init_buf(struct drm_device *dev,
unsigned int size);
/* destroy buffer object. */
void exynos_drm_fini_buf(struct drm_device *dev,
struct exynos_drm_gem_buf *buffer);
/* allocate physical memory region and setup sgt. */
int exynos_drm_alloc_buf(struct drm_device *dev,
struct exynos_drm_gem_buf *buf,
unsigned int flags);
/* release physical memory region, and sgt. */
void exynos_drm_free_buf(struct drm_device *dev,
unsigned int flags,
struct exynos_drm_gem_buf *buffer);
#endif