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1 | /* |
2 | * Copyright © 2012 Intel Corporation | |
3 | * Copyright © 2014 The Chromium OS Authors | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice (including the next | |
13 | * paragraph) shall be included in all copies or substantial portions of the | |
14 | * Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
22 | * IN THE SOFTWARE. | |
23 | * | |
24 | * Authors: | |
25 | * Ben Widawsky <ben@bwidawsk.net> | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <linux/dma-buf.h> | |
30 | #include "vgem_drv.h" | |
31 | ||
32 | struct sg_table *vgem_gem_prime_get_sg_table(struct drm_gem_object *gobj) | |
33 | { | |
34 | struct drm_vgem_gem_object *obj = to_vgem_bo(gobj); | |
35 | BUG_ON(obj->pages == NULL); | |
36 | ||
37 | return drm_prime_pages_to_sg(obj->pages, obj->base.size / PAGE_SIZE); | |
38 | } | |
39 | ||
40 | int vgem_gem_prime_pin(struct drm_gem_object *gobj) | |
41 | { | |
42 | struct drm_vgem_gem_object *obj = to_vgem_bo(gobj); | |
43 | return vgem_gem_get_pages(obj); | |
44 | } | |
45 | ||
46 | void vgem_gem_prime_unpin(struct drm_gem_object *gobj) | |
47 | { | |
48 | struct drm_vgem_gem_object *obj = to_vgem_bo(gobj); | |
49 | vgem_gem_put_pages(obj); | |
50 | } | |
51 | ||
52 | void *vgem_gem_prime_vmap(struct drm_gem_object *gobj) | |
53 | { | |
54 | struct drm_vgem_gem_object *obj = to_vgem_bo(gobj); | |
55 | BUG_ON(obj->pages == NULL); | |
56 | ||
57 | return vmap(obj->pages, obj->base.size / PAGE_SIZE, 0, PAGE_KERNEL); | |
58 | } | |
59 | ||
60 | void vgem_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) | |
61 | { | |
62 | vunmap(vaddr); | |
63 | } | |
64 | ||
65 | struct drm_gem_object *vgem_gem_prime_import(struct drm_device *dev, | |
66 | struct dma_buf *dma_buf) | |
67 | { | |
68 | struct drm_vgem_gem_object *obj = NULL; | |
69 | int ret; | |
70 | ||
71 | obj = kzalloc(sizeof(*obj), GFP_KERNEL); | |
72 | if (obj == NULL) { | |
73 | ret = -ENOMEM; | |
74 | goto fail; | |
75 | } | |
76 | ||
77 | ret = drm_gem_object_init(dev, &obj->base, dma_buf->size); | |
78 | if (ret) { | |
79 | ret = -ENOMEM; | |
80 | goto fail_free; | |
81 | } | |
82 | ||
83 | get_dma_buf(dma_buf); | |
84 | ||
85 | obj->base.dma_buf = dma_buf; | |
86 | obj->use_dma_buf = true; | |
87 | ||
88 | return &obj->base; | |
89 | ||
90 | fail_free: | |
91 | kfree(obj); | |
92 | fail: | |
93 | return ERR_PTR(ret); | |
94 | } |