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a8c21a54 T |
1 | /* |
2 | * Copyright (C) 2013 Red Hat | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include <linux/dma-buf.h> | |
19 | #include "etnaviv_drv.h" | |
20 | #include "etnaviv_gem.h" | |
21 | ||
22 | ||
23 | struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj) | |
24 | { | |
25 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
26 | ||
27 | BUG_ON(!etnaviv_obj->sgt); /* should have already pinned! */ | |
28 | ||
29 | return etnaviv_obj->sgt; | |
30 | } | |
31 | ||
32 | void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj) | |
33 | { | |
34 | return etnaviv_gem_vaddr(obj); | |
35 | } | |
36 | ||
37 | void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) | |
38 | { | |
39 | /* TODO msm_gem_vunmap() */ | |
40 | } | |
41 | ||
42 | int etnaviv_gem_prime_pin(struct drm_gem_object *obj) | |
43 | { | |
44 | if (!obj->import_attach) { | |
45 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
46 | ||
47 | mutex_lock(&etnaviv_obj->lock); | |
48 | etnaviv_gem_get_pages(etnaviv_obj); | |
49 | mutex_unlock(&etnaviv_obj->lock); | |
50 | } | |
51 | return 0; | |
52 | } | |
53 | ||
54 | void etnaviv_gem_prime_unpin(struct drm_gem_object *obj) | |
55 | { | |
56 | if (!obj->import_attach) { | |
57 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
58 | ||
59 | mutex_lock(&etnaviv_obj->lock); | |
60 | etnaviv_gem_put_pages(to_etnaviv_bo(obj)); | |
61 | mutex_unlock(&etnaviv_obj->lock); | |
62 | } | |
63 | } | |
64 | ||
65 | static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj) | |
66 | { | |
67 | if (etnaviv_obj->vaddr) | |
68 | dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf, | |
69 | etnaviv_obj->vaddr); | |
70 | ||
71 | /* Don't drop the pages for imported dmabuf, as they are not | |
72 | * ours, just free the array we allocated: | |
73 | */ | |
74 | if (etnaviv_obj->pages) | |
75 | drm_free_large(etnaviv_obj->pages); | |
76 | ||
77 | drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt); | |
78 | } | |
79 | ||
80 | static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = { | |
81 | /* .get_pages should never be called */ | |
82 | .release = etnaviv_gem_prime_release, | |
83 | }; | |
84 | ||
85 | struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev, | |
86 | struct dma_buf_attachment *attach, struct sg_table *sgt) | |
87 | { | |
88 | struct etnaviv_gem_object *etnaviv_obj; | |
89 | size_t size = PAGE_ALIGN(attach->dmabuf->size); | |
90 | int ret, npages; | |
91 | ||
92 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC, | |
93 | attach->dmabuf->resv, | |
94 | &etnaviv_gem_prime_ops, &etnaviv_obj); | |
95 | if (ret < 0) | |
96 | return ERR_PTR(ret); | |
97 | ||
98 | npages = size / PAGE_SIZE; | |
99 | ||
100 | etnaviv_obj->sgt = sgt; | |
101 | etnaviv_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); | |
102 | if (!etnaviv_obj->pages) { | |
103 | ret = -ENOMEM; | |
104 | goto fail; | |
105 | } | |
106 | ||
107 | ret = drm_prime_sg_to_page_addr_arrays(sgt, etnaviv_obj->pages, | |
108 | NULL, npages); | |
109 | if (ret) | |
110 | goto fail; | |
111 | ||
112 | ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base); | |
113 | if (ret) | |
114 | goto fail; | |
115 | ||
116 | return &etnaviv_obj->base; | |
117 | ||
118 | fail: | |
119 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
120 | ||
121 | return ERR_PTR(ret); | |
122 | } |