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)
32 #define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG)
35 * exynos drm gem buffer structure.
37 * @kvaddr: kernel virtual address to allocated memory region.
38 * @dma_addr: bus address(accessed by dma) to allocated memory region.
39 * - this address could be physical address without IOMMU and
40 * device address with IOMMU.
41 * @sgt: sg table to transfer page data.
42 * @pages: contain all pages to allocated memory region.
43 * @page_size: could be 4K, 64K or 1MB.
44 * @size: size of allocated memory region.
46 struct exynos_drm_gem_buf {
49 struct dma_attrs dma_attrs;
52 unsigned long page_size;
57 * exynos drm buffer structure.
59 * @base: a gem object.
60 * - a new handle to this gem object would be created
61 * by drm_gem_handle_create().
62 * @buffer: a pointer to exynos_drm_gem_buffer object.
63 * - contain the information to memory region allocated
64 * by user request or at framebuffer creation.
65 * continuous memory region allocated by user request
66 * or at framebuffer creation.
67 * @size: size requested from user, in bytes and this size is aligned
69 * @flags: indicate memory type to allocated buffer and cache attruibute.
71 * P.S. this object would be transfered to user as kms_bo.handle so
72 * user can access the buffer through kms_bo.handle.
74 struct exynos_drm_gem_obj {
75 struct drm_gem_object base;
76 struct exynos_drm_gem_buf *buffer;
81 struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
83 /* destroy a buffer with gem object */
84 void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj);
86 /* create a private gem object and initialize it. */
87 struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
90 /* create a new buffer with gem object */
91 struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
96 * request gem object creation and buffer allocation as the size
97 * that it is calculated with framebuffer information such as width,
100 int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
101 struct drm_file *file_priv);
104 * get dma address from gem handle and this function could be used for
105 * other drivers such as 2d/3d acceleration drivers.
106 * with this function call, gem object reference count would be increased.
108 void *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
109 unsigned int gem_handle,
110 struct drm_file *file_priv);
113 * put dma address from gem handle and this function could be used for
114 * other drivers such as 2d/3d acceleration drivers.
115 * with this function call, gem object reference count would be decreased.
117 void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
118 unsigned int gem_handle,
119 struct drm_file *file_priv);
121 /* get buffer offset to map to user space. */
122 int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
123 struct drm_file *file_priv);
126 * mmap the physically continuous memory that a gem object contains
129 int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
130 struct drm_file *file_priv);
132 /* get buffer information to memory region allocated by gem. */
133 int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
134 struct drm_file *file_priv);
136 /* initialize gem object. */
137 int exynos_drm_gem_init_object(struct drm_gem_object *obj);
139 /* free gem object. */
140 void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj);
142 /* create memory region for drm framebuffer. */
143 int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
144 struct drm_device *dev,
145 struct drm_mode_create_dumb *args);
147 /* map memory region for drm framebuffer to user space. */
148 int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
149 struct drm_device *dev, uint32_t handle,
153 * destroy memory region allocated.
154 * - a gem handle and physical memory region pointed by a gem object
155 * would be released by drm_gem_handle_delete().
157 int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
158 struct drm_device *dev,
159 unsigned int handle);
161 /* page fault handler and mmap fault address(virtual) to physical memory. */
162 int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
164 /* set vm_flags and we can change the vm attribute to other one at here. */
165 int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);