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1 | /************************************************************************** |
2 | * | |
3 | * Copyright © 2013 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the 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 NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | /* | |
28 | * Authors: | |
29 | * Thomas Hellstrom <thellstrom@vmware.com> | |
30 | * | |
31 | */ | |
32 | ||
33 | #include "vmwgfx_drv.h" | |
34 | #include <linux/dma-buf.h> | |
35 | #include <drm/ttm/ttm_object.h> | |
36 | ||
37 | /* | |
38 | * DMA-BUF attach- and mapping methods. No need to implement | |
39 | * these until we have other virtual devices use them. | |
40 | */ | |
41 | ||
42 | static int vmw_prime_map_attach(struct dma_buf *dma_buf, | |
43 | struct device *target_dev, | |
44 | struct dma_buf_attachment *attach) | |
45 | { | |
46 | return -ENOSYS; | |
47 | } | |
48 | ||
49 | static void vmw_prime_map_detach(struct dma_buf *dma_buf, | |
50 | struct dma_buf_attachment *attach) | |
51 | { | |
52 | } | |
53 | ||
54 | static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach, | |
55 | enum dma_data_direction dir) | |
56 | { | |
57 | return ERR_PTR(-ENOSYS); | |
58 | } | |
59 | ||
60 | static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach, | |
61 | struct sg_table *sgb, | |
62 | enum dma_data_direction dir) | |
63 | { | |
64 | } | |
65 | ||
66 | static void *vmw_prime_dmabuf_vmap(struct dma_buf *dma_buf) | |
67 | { | |
68 | return NULL; | |
69 | } | |
70 | ||
71 | static void vmw_prime_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr) | |
72 | { | |
73 | } | |
74 | ||
75 | static void *vmw_prime_dmabuf_kmap_atomic(struct dma_buf *dma_buf, | |
76 | unsigned long page_num) | |
77 | { | |
78 | return NULL; | |
79 | } | |
80 | ||
81 | static void vmw_prime_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, | |
82 | unsigned long page_num, void *addr) | |
83 | { | |
84 | ||
85 | } | |
86 | static void *vmw_prime_dmabuf_kmap(struct dma_buf *dma_buf, | |
87 | unsigned long page_num) | |
88 | { | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | static void vmw_prime_dmabuf_kunmap(struct dma_buf *dma_buf, | |
93 | unsigned long page_num, void *addr) | |
94 | { | |
95 | ||
96 | } | |
97 | ||
98 | static int vmw_prime_dmabuf_mmap(struct dma_buf *dma_buf, | |
99 | struct vm_area_struct *vma) | |
100 | { | |
101 | WARN_ONCE(true, "Attempted use of dmabuf mmap. Bad.\n"); | |
102 | return -ENOSYS; | |
103 | } | |
104 | ||
105 | const struct dma_buf_ops vmw_prime_dmabuf_ops = { | |
106 | .attach = vmw_prime_map_attach, | |
107 | .detach = vmw_prime_map_detach, | |
108 | .map_dma_buf = vmw_prime_map_dma_buf, | |
109 | .unmap_dma_buf = vmw_prime_unmap_dma_buf, | |
110 | .release = NULL, | |
111 | .kmap = vmw_prime_dmabuf_kmap, | |
112 | .kmap_atomic = vmw_prime_dmabuf_kmap_atomic, | |
113 | .kunmap = vmw_prime_dmabuf_kunmap, | |
114 | .kunmap_atomic = vmw_prime_dmabuf_kunmap_atomic, | |
115 | .mmap = vmw_prime_dmabuf_mmap, | |
116 | .vmap = vmw_prime_dmabuf_vmap, | |
117 | .vunmap = vmw_prime_dmabuf_vunmap, | |
118 | }; | |
119 | ||
120 | int vmw_prime_fd_to_handle(struct drm_device *dev, | |
121 | struct drm_file *file_priv, | |
122 | int fd, u32 *handle) | |
123 | { | |
124 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
125 | ||
126 | return ttm_prime_fd_to_handle(tfile, fd, handle); | |
127 | } | |
128 | ||
129 | int vmw_prime_handle_to_fd(struct drm_device *dev, | |
130 | struct drm_file *file_priv, | |
131 | uint32_t handle, uint32_t flags, | |
132 | int *prime_fd) | |
133 | { | |
134 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
135 | ||
136 | return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd); | |
137 | } |