3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
12 #ifndef _EXYNOS_DRM_GEM_H_
13 #define _EXYNOS_DRM_GEM_H_
15 #include <drm/drm_gem.h>
17 #define to_exynos_gem_obj(x) container_of(x,\
18 struct exynos_drm_gem_obj, base)
20 #define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG)
23 * exynos drm gem buffer structure.
25 * @cookie: cookie returned by dma_alloc_attrs
26 * @kvaddr: kernel virtual address to allocated memory region.
27 * *userptr: user space address.
28 * @dma_addr: bus address(accessed by dma) to allocated memory region.
29 * - this address could be physical address without IOMMU and
30 * device address with IOMMU.
31 * @write: whether pages will be written to by the caller.
32 * @pages: Array of backing pages.
33 * @sgt: sg table to transfer page data.
34 * @size: size of allocated memory region.
35 * @pfnmap: indicate whether memory region from userptr is mmaped with
38 struct exynos_drm_gem_buf {
41 unsigned long userptr;
43 struct dma_attrs dma_attrs;
52 * exynos drm buffer structure.
54 * @base: a gem object.
55 * - a new handle to this gem object would be created
56 * by drm_gem_handle_create().
57 * @buffer: a pointer to exynos_drm_gem_buffer object.
58 * - contain the information to memory region allocated
59 * by user request or at framebuffer creation.
60 * continuous memory region allocated by user request
61 * or at framebuffer creation.
62 * @size: size requested from user, in bytes and this size is aligned
64 * @flags: indicate memory type to allocated buffer and cache attruibute.
66 * P.S. this object would be transferred to user as kms_bo.handle so
67 * user can access the buffer through kms_bo.handle.
69 struct exynos_drm_gem_obj {
70 struct drm_gem_object base;
71 struct exynos_drm_gem_buf *buffer;
76 struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
78 /* destroy a buffer with gem object */
79 void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj);
81 /* create a private gem object and initialize it. */
82 struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
85 /* create a new buffer with gem object */
86 struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
91 * request gem object creation and buffer allocation as the size
92 * that it is calculated with framebuffer information such as width,
95 int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
96 struct drm_file *file_priv);
99 * get dma address from gem handle and this function could be used for
100 * other drivers such as 2d/3d acceleration drivers.
101 * with this function call, gem object reference count would be increased.
103 dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
104 unsigned int gem_handle,
105 struct drm_file *filp);
108 * put dma address from gem handle and this function could be used for
109 * other drivers such as 2d/3d acceleration drivers.
110 * with this function call, gem object reference count would be decreased.
112 void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
113 unsigned int gem_handle,
114 struct drm_file *filp);
116 /* map user space allocated by malloc to pages. */
117 int exynos_drm_gem_userptr_ioctl(struct drm_device *dev, void *data,
118 struct drm_file *file_priv);
120 /* get buffer information to memory region allocated by gem. */
121 int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
122 struct drm_file *file_priv);
124 /* get buffer size to gem handle. */
125 unsigned long exynos_drm_gem_get_size(struct drm_device *dev,
126 unsigned int gem_handle,
127 struct drm_file *file_priv);
129 /* free gem object. */
130 void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj);
132 /* create memory region for drm framebuffer. */
133 int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
134 struct drm_device *dev,
135 struct drm_mode_create_dumb *args);
137 /* map memory region for drm framebuffer to user space. */
138 int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
139 struct drm_device *dev, uint32_t handle,
142 /* page fault handler and mmap fault address(virtual) to physical memory. */
143 int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
145 /* set vm_flags and we can change the vm attribute to other one at here. */
146 int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
148 static inline int vma_is_io(struct vm_area_struct *vma)
150 return !!(vma->vm_flags & (VM_IO | VM_PFNMAP));
153 /* get a copy of a virtual memory region. */
154 struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma);
156 /* release a userspace virtual memory area. */
157 void exynos_gem_put_vma(struct vm_area_struct *vma);
159 /* get pages from user space. */
160 int exynos_gem_get_pages_from_userptr(unsigned long start,
163 struct vm_area_struct *vma);
165 /* drop the reference to pages. */
166 void exynos_gem_put_pages_to_userptr(struct page **pages,
168 struct vm_area_struct *vma);
170 /* map sgt with dma region. */
171 int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev,
172 struct sg_table *sgt,
173 enum dma_data_direction dir);
175 /* unmap sgt from dma region. */
176 void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev,
177 struct sg_table *sgt,
178 enum dma_data_direction dir);