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 * @sgt: sg table to transfer page data.
44 * @size: size of allocated memory region.
45 * @pfnmap: indicate whether memory region from userptr is mmaped with
48 struct exynos_drm_gem_buf {
50 unsigned long userptr;
52 struct dma_attrs dma_attrs;
60 * exynos drm buffer structure.
62 * @base: a gem object.
63 * - a new handle to this gem object would be created
64 * by drm_gem_handle_create().
65 * @buffer: a pointer to exynos_drm_gem_buffer object.
66 * - contain the information to memory region allocated
67 * by user request or at framebuffer creation.
68 * continuous memory region allocated by user request
69 * or at framebuffer creation.
70 * @size: size requested from user, in bytes and this size is aligned
72 * @vma: a pointer to vm_area.
73 * @flags: indicate memory type to allocated buffer and cache attruibute.
75 * P.S. this object would be transfered to user as kms_bo.handle so
76 * user can access the buffer through kms_bo.handle.
78 struct exynos_drm_gem_obj {
79 struct drm_gem_object base;
80 struct exynos_drm_gem_buf *buffer;
82 struct vm_area_struct *vma;
86 struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
88 /* destroy a buffer with gem object */
89 void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj);
91 /* create a private gem object and initialize it. */
92 struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
95 /* create a new buffer with gem object */
96 struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
101 * request gem object creation and buffer allocation as the size
102 * that it is calculated with framebuffer information such as width,
105 int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
106 struct drm_file *file_priv);
109 * get dma address from gem handle and this function could be used for
110 * other drivers such as 2d/3d acceleration drivers.
111 * with this function call, gem object reference count would be increased.
113 dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
114 unsigned int gem_handle,
115 struct drm_file *filp);
118 * put dma address from gem handle and this function could be used for
119 * other drivers such as 2d/3d acceleration drivers.
120 * with this function call, gem object reference count would be decreased.
122 void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
123 unsigned int gem_handle,
124 struct drm_file *filp);
126 /* get buffer offset to map to user space. */
127 int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
128 struct drm_file *file_priv);
131 * mmap the physically continuous memory that a gem object contains
134 int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
135 struct drm_file *file_priv);
137 /* map user space allocated by malloc to pages. */
138 int exynos_drm_gem_userptr_ioctl(struct drm_device *dev, void *data,
139 struct drm_file *file_priv);
141 /* get buffer information to memory region allocated by gem. */
142 int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
143 struct drm_file *file_priv);
145 /* initialize gem object. */
146 int exynos_drm_gem_init_object(struct drm_gem_object *obj);
148 /* free gem object. */
149 void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj);
151 /* create memory region for drm framebuffer. */
152 int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
153 struct drm_device *dev,
154 struct drm_mode_create_dumb *args);
156 /* map memory region for drm framebuffer to user space. */
157 int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
158 struct drm_device *dev, uint32_t handle,
162 * destroy memory region allocated.
163 * - a gem handle and physical memory region pointed by a gem object
164 * would be released by drm_gem_handle_delete().
166 int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
167 struct drm_device *dev,
168 unsigned int handle);
170 /* page fault handler and mmap fault address(virtual) to physical memory. */
171 int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
173 /* set vm_flags and we can change the vm attribute to other one at here. */
174 int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
176 static inline int vma_is_io(struct vm_area_struct *vma)
178 return !!(vma->vm_flags & (VM_IO | VM_PFNMAP));
181 /* get a copy of a virtual memory region. */
182 struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma);
184 /* release a userspace virtual memory area. */
185 void exynos_gem_put_vma(struct vm_area_struct *vma);
187 /* get pages from user space. */
188 int exynos_gem_get_pages_from_userptr(unsigned long start,
191 struct vm_area_struct *vma);
193 /* drop the reference to pages. */
194 void exynos_gem_put_pages_to_userptr(struct page **pages,
196 struct vm_area_struct *vma);
198 /* map sgt with dma region. */
199 int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev,
200 struct sg_table *sgt,
201 enum dma_data_direction dir);
203 /* unmap sgt from dma region. */
204 void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev,
205 struct sg_table *sgt,
206 enum dma_data_direction dir);