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 * *userptr: user space address.
39 * @dma_addr: bus address(accessed by dma) to allocated memory region.
40 * - this address could be physical address without IOMMU and
41 * device address with IOMMU.
42 * @write: whether pages will be written to by the caller.
43 * @pages: Array of backing pages.
44 * @sgt: sg table to transfer page data.
45 * @size: size of allocated memory region.
46 * @pfnmap: indicate whether memory region from userptr is mmaped with
49 struct exynos_drm_gem_buf {
51 unsigned long userptr;
53 struct dma_attrs dma_attrs;
62 * exynos drm buffer structure.
64 * @base: a gem object.
65 * - a new handle to this gem object would be created
66 * by drm_gem_handle_create().
67 * @buffer: a pointer to exynos_drm_gem_buffer object.
68 * - contain the information to memory region allocated
69 * by user request or at framebuffer creation.
70 * continuous memory region allocated by user request
71 * or at framebuffer creation.
72 * @size: size requested from user, in bytes and this size is aligned
74 * @vma: a pointer to vm_area.
75 * @flags: indicate memory type to allocated buffer and cache attruibute.
77 * P.S. this object would be transfered to user as kms_bo.handle so
78 * user can access the buffer through kms_bo.handle.
80 struct exynos_drm_gem_obj {
81 struct drm_gem_object base;
82 struct exynos_drm_gem_buf *buffer;
84 struct vm_area_struct *vma;
88 struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
90 /* destroy a buffer with gem object */
91 void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj);
93 /* create a private gem object and initialize it. */
94 struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
97 /* create a new buffer with gem object */
98 struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
103 * request gem object creation and buffer allocation as the size
104 * that it is calculated with framebuffer information such as width,
107 int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
108 struct drm_file *file_priv);
111 * get dma address from gem handle and this function could be used for
112 * other drivers such as 2d/3d acceleration drivers.
113 * with this function call, gem object reference count would be increased.
115 dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
116 unsigned int gem_handle,
117 struct drm_file *filp);
120 * put dma address from gem handle and this function could be used for
121 * other drivers such as 2d/3d acceleration drivers.
122 * with this function call, gem object reference count would be decreased.
124 void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
125 unsigned int gem_handle,
126 struct drm_file *filp);
128 /* get buffer offset to map to user space. */
129 int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
130 struct drm_file *file_priv);
133 * mmap the physically continuous memory that a gem object contains
136 int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
137 struct drm_file *file_priv);
139 /* map user space allocated by malloc to pages. */
140 int exynos_drm_gem_userptr_ioctl(struct drm_device *dev, void *data,
141 struct drm_file *file_priv);
143 /* get buffer information to memory region allocated by gem. */
144 int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
145 struct drm_file *file_priv);
147 /* initialize gem object. */
148 int exynos_drm_gem_init_object(struct drm_gem_object *obj);
150 /* free gem object. */
151 void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj);
153 /* create memory region for drm framebuffer. */
154 int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
155 struct drm_device *dev,
156 struct drm_mode_create_dumb *args);
158 /* map memory region for drm framebuffer to user space. */
159 int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
160 struct drm_device *dev, uint32_t handle,
164 * destroy memory region allocated.
165 * - a gem handle and physical memory region pointed by a gem object
166 * would be released by drm_gem_handle_delete().
168 int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
169 struct drm_device *dev,
170 unsigned int handle);
172 /* page fault handler and mmap fault address(virtual) to physical memory. */
173 int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
175 /* set vm_flags and we can change the vm attribute to other one at here. */
176 int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
178 static inline int vma_is_io(struct vm_area_struct *vma)
180 return !!(vma->vm_flags & (VM_IO | VM_PFNMAP));
183 /* get a copy of a virtual memory region. */
184 struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma);
186 /* release a userspace virtual memory area. */
187 void exynos_gem_put_vma(struct vm_area_struct *vma);
189 /* get pages from user space. */
190 int exynos_gem_get_pages_from_userptr(unsigned long start,
193 struct vm_area_struct *vma);
195 /* drop the reference to pages. */
196 void exynos_gem_put_pages_to_userptr(struct page **pages,
198 struct vm_area_struct *vma);
200 /* map sgt with dma region. */
201 int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev,
202 struct sg_table *sgt,
203 enum dma_data_direction dir);
205 /* unmap sgt from dma region. */
206 void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev,
207 struct sg_table *sgt,
208 enum dma_data_direction dir);