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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - drivers/gpu/drm/exynos/exynos_drm_gem.h
3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
4 * Authoer: Inki Dae <inki.dae@samsung.com>
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
26 #ifndef _EXYNOS_DRM_GEM_H_
27 #define _EXYNOS_DRM_GEM_H_
29 #define to_exynos_gem_obj(x) container_of(x,\
30 struct exynos_drm_gem_obj, base)
33 * exynos drm gem buffer structure.
35 * @kvaddr: kernel virtual address to allocated memory region.
36 * @dma_addr: bus address(accessed by dma) to allocated memory region.
37 * - this address could be physical address without IOMMU and
38 * device address with IOMMU.
39 * @size: size of allocated memory region.
41 struct exynos_drm_gem_buf
{
48 * exynos drm buffer structure.
50 * @base: a gem object.
51 * - a new handle to this gem object would be created
52 * by drm_gem_handle_create().
53 * @buffer: a pointer to exynos_drm_gem_buffer object.
54 * - contain the information to memory region allocated
55 * by user request or at framebuffer creation.
56 * continuous memory region allocated by user request
57 * or at framebuffer creation.
59 * P.S. this object would be transfered to user as kms_bo.handle so
60 * user can access the buffer through kms_bo.handle.
62 struct exynos_drm_gem_obj
{
63 struct drm_gem_object base
;
64 struct exynos_drm_gem_buf
*buffer
;
67 /* create a new buffer and get a new gem handle. */
68 struct exynos_drm_gem_obj
*exynos_drm_gem_create(struct drm_device
*dev
,
69 struct drm_file
*file_priv
,
70 unsigned int *handle
, unsigned long size
);
73 * request gem object creation and buffer allocation as the size
74 * that it is calculated with framebuffer information such as width,
77 int exynos_drm_gem_create_ioctl(struct drm_device
*dev
, void *data
,
78 struct drm_file
*file_priv
);
80 /* get buffer offset to map to user space. */
81 int exynos_drm_gem_map_offset_ioctl(struct drm_device
*dev
, void *data
,
82 struct drm_file
*file_priv
);
84 /* unmap a buffer from user space. */
85 int exynos_drm_gem_munmap_ioctl(struct drm_device
*dev
, void *data
,
86 struct drm_file
*file_priv
);
88 /* initialize gem object. */
89 int exynos_drm_gem_init_object(struct drm_gem_object
*obj
);
91 /* free gem object. */
92 void exynos_drm_gem_free_object(struct drm_gem_object
*gem_obj
);
94 /* create memory region for drm framebuffer. */
95 int exynos_drm_gem_dumb_create(struct drm_file
*file_priv
,
96 struct drm_device
*dev
, struct drm_mode_create_dumb
*args
);
98 /* map memory region for drm framebuffer to user space. */
99 int exynos_drm_gem_dumb_map_offset(struct drm_file
*file_priv
,
100 struct drm_device
*dev
, uint32_t handle
, uint64_t *offset
);
102 /* page fault handler and mmap fault address(virtual) to physical memory. */
103 int exynos_drm_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
106 * mmap the physically continuous memory that a gem object contains
109 int exynos_drm_gem_mmap_ioctl(struct drm_device
*dev
, void *data
,
110 struct drm_file
*file_priv
);
112 /* set vm_flags and we can change the vm attribute to other one at here. */
113 int exynos_drm_gem_mmap(struct file
*filp
, struct vm_area_struct
*vma
);
116 * destroy memory region allocated.
117 * - a gem handle and physical memory region pointed by a gem object
118 * would be released by drm_gem_handle_delete().
120 int exynos_drm_gem_dumb_destroy(struct drm_file
*file_priv
,
121 struct drm_device
*dev
, unsigned int handle
);