1 /*
2 * Copyright © 2012 Red Hat
3 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
4 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
5 * Copyright (c) 2009-2010, Code Aurora Forum.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the next
15 * paragraph) shall be included in all copies or substantial portions of the
16 * Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * IN THE SOFTWARE.
25 *
26 * Authors:
27 * Dave Airlie <airlied@redhat.com>
28 * Rob Clark <rob.clark@linaro.org>
29 *
30 */
31
32 #ifndef __DRM_PRIME_H__
33 #define __DRM_PRIME_H__
34
35 #include <linux/mutex.h>
36 #include <linux/rbtree.h>
37 #include <linux/scatterlist.h>
38
39 /**
40 * struct drm_prime_file_private - per-file tracking for PRIME
41 *
42 * This just contains the internal &struct dma_buf and handle caches for each
43 * &struct drm_file used by the PRIME core code.
44 */
45 struct drm_prime_file_private {
46 /* private: */
47 struct mutex lock;
48 struct rb_root dmabufs;
49 struct rb_root handles;
50 };
51
52 struct device;
53
54 struct dma_buf_export_info;
55 struct dma_buf;
56 struct dma_buf_attachment;
57 struct iosys_map;
58
59 enum dma_data_direction;
60
61 struct drm_device;
62 struct drm_gem_object;
63 struct drm_file;
64
65 /* core prime functions */
66 struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
67 struct dma_buf_export_info *exp_info);
68 void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
69
70 int drm_gem_prime_fd_to_handle(struct drm_device *dev,
71 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
72 int drm_gem_prime_handle_to_fd(struct drm_device *dev,
73 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
74 int *prime_fd);
75
76 /* helper functions for exporting */
77 int drm_gem_map_attach(struct dma_buf *dma_buf,
78 struct dma_buf_attachment *attach);
79 void drm_gem_map_detach(struct dma_buf *dma_buf,
80 struct dma_buf_attachment *attach);
81 struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
82 enum dma_data_direction dir);
83 void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
84 struct sg_table *sgt,
85 enum dma_data_direction dir);
86 int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct iosys_map *map);
87 void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct iosys_map *map);
88
89 int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
90 int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
91
92 struct sg_table *drm_prime_pages_to_sg(struct drm_device *dev,
93 struct page **pages, unsigned int nr_pages);
94 struct dma_buf *drm_gem_prime_export(struct drm_gem_object *obj,
95 int flags);
96
97 unsigned long drm_prime_get_contiguous_size(struct sg_table *sgt);
98
99 /* helper functions for importing */
100 struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
101 struct dma_buf *dma_buf,
102 struct device *attach_dev);
103 struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
104 struct dma_buf *dma_buf);
105
106 void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
107
108 int drm_prime_sg_to_page_array(struct sg_table *sgt, struct page **pages,
109 int max_pages);
110 int drm_prime_sg_to_dma_addr_array(struct sg_table *sgt, dma_addr_t *addrs,
111 int max_pages);
112
113 #endif /* __DRM_PRIME_H__ */
114
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