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 
46 struct drm_prime_file_private {
47 /* private: */
48 	struct mutex lock;
49 	struct rb_root dmabufs;
50 	struct rb_root handles;
51 };
52 
53 struct device;
54 
55 struct dma_buf_export_info;
56 struct dma_buf;
57 struct dma_buf_attachment;
58 
59 enum dma_data_direction;
60 
61 struct drm_device;
62 struct drm_gem_object;
63 struct drm_file;
64 
65 struct device;
66 
67 struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
68 				     struct drm_gem_object *obj,
69 				     int flags);
70 int drm_gem_prime_handle_to_fd(struct drm_device *dev,
71 			       struct drm_file *file_priv, uint32_t handle, uint32_t flags,
72 			       int *prime_fd);
73 struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
74 					    struct dma_buf *dma_buf);
75 
76 struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
77 						struct dma_buf *dma_buf,
78 						struct device *attach_dev);
79 
80 int drm_gem_prime_fd_to_handle(struct drm_device *dev,
81 			       struct drm_file *file_priv, int prime_fd, uint32_t *handle);
82 struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
83 				      struct dma_buf_export_info *exp_info);
84 void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
85 int drm_gem_map_attach(struct dma_buf *dma_buf,
86 		       struct dma_buf_attachment *attach);
87 void drm_gem_map_detach(struct dma_buf *dma_buf,
88 			struct dma_buf_attachment *attach);
89 struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
90 				     enum dma_data_direction dir);
91 void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
92 			   struct sg_table *sgt,
93 			   enum dma_data_direction dir);
94 void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf);
95 void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr);
96 void *drm_gem_dmabuf_kmap(struct dma_buf *dma_buf, unsigned long page_num);
97 void drm_gem_dmabuf_kunmap(struct dma_buf *dma_buf, unsigned long page_num,
98 			   void *addr);
99 int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
100 
101 int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
102 				     dma_addr_t *addrs, int max_pages);
103 struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
104 void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
105 
106 
107 #endif /* __DRM_PRIME_H__ */
108