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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); | |
5f4a4a73 | 26 | int npages = obj->size >> PAGE_SHIFT; |
a8c21a54 | 27 | |
5f4a4a73 LS |
28 | if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */ |
29 | return NULL; | |
a8c21a54 | 30 | |
5f4a4a73 | 31 | return drm_prime_pages_to_sg(etnaviv_obj->pages, npages); |
a8c21a54 T |
32 | } |
33 | ||
34 | void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj) | |
35 | { | |
ce3088fd | 36 | return etnaviv_gem_vmap(obj); |
a8c21a54 T |
37 | } |
38 | ||
39 | void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) | |
40 | { | |
41 | /* TODO msm_gem_vunmap() */ | |
42 | } | |
43 | ||
5688e57e LS |
44 | int etnaviv_gem_prime_mmap(struct drm_gem_object *obj, |
45 | struct vm_area_struct *vma) | |
46 | { | |
47 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
48 | int ret; | |
49 | ||
50 | ret = drm_gem_mmap_obj(obj, obj->size, vma); | |
51 | if (ret < 0) | |
52 | return ret; | |
53 | ||
54 | return etnaviv_obj->ops->mmap(etnaviv_obj, vma); | |
55 | } | |
56 | ||
a8c21a54 T |
57 | int etnaviv_gem_prime_pin(struct drm_gem_object *obj) |
58 | { | |
59 | if (!obj->import_attach) { | |
60 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
61 | ||
62 | mutex_lock(&etnaviv_obj->lock); | |
63 | etnaviv_gem_get_pages(etnaviv_obj); | |
64 | mutex_unlock(&etnaviv_obj->lock); | |
65 | } | |
66 | return 0; | |
67 | } | |
68 | ||
69 | void etnaviv_gem_prime_unpin(struct drm_gem_object *obj) | |
70 | { | |
71 | if (!obj->import_attach) { | |
72 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
73 | ||
74 | mutex_lock(&etnaviv_obj->lock); | |
75 | etnaviv_gem_put_pages(to_etnaviv_bo(obj)); | |
76 | mutex_unlock(&etnaviv_obj->lock); | |
77 | } | |
78 | } | |
79 | ||
80 | static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj) | |
81 | { | |
82 | if (etnaviv_obj->vaddr) | |
83 | dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf, | |
84 | etnaviv_obj->vaddr); | |
85 | ||
86 | /* Don't drop the pages for imported dmabuf, as they are not | |
87 | * ours, just free the array we allocated: | |
88 | */ | |
89 | if (etnaviv_obj->pages) | |
90 | drm_free_large(etnaviv_obj->pages); | |
91 | ||
92 | drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt); | |
93 | } | |
94 | ||
a0a5ab3e LS |
95 | static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj) |
96 | { | |
97 | lockdep_assert_held(&etnaviv_obj->lock); | |
98 | ||
99 | return dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf); | |
100 | } | |
101 | ||
a10e2bde LS |
102 | static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
103 | struct vm_area_struct *vma) | |
104 | { | |
105 | return dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0); | |
106 | } | |
107 | ||
a8c21a54 T |
108 | static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = { |
109 | /* .get_pages should never be called */ | |
110 | .release = etnaviv_gem_prime_release, | |
a0a5ab3e | 111 | .vmap = etnaviv_gem_prime_vmap_impl, |
a10e2bde | 112 | .mmap = etnaviv_gem_prime_mmap_obj, |
a8c21a54 T |
113 | }; |
114 | ||
115 | struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev, | |
116 | struct dma_buf_attachment *attach, struct sg_table *sgt) | |
117 | { | |
118 | struct etnaviv_gem_object *etnaviv_obj; | |
119 | size_t size = PAGE_ALIGN(attach->dmabuf->size); | |
120 | int ret, npages; | |
121 | ||
122 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC, | |
123 | attach->dmabuf->resv, | |
124 | &etnaviv_gem_prime_ops, &etnaviv_obj); | |
125 | if (ret < 0) | |
126 | return ERR_PTR(ret); | |
127 | ||
128 | npages = size / PAGE_SIZE; | |
129 | ||
130 | etnaviv_obj->sgt = sgt; | |
131 | etnaviv_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); | |
132 | if (!etnaviv_obj->pages) { | |
133 | ret = -ENOMEM; | |
134 | goto fail; | |
135 | } | |
136 | ||
137 | ret = drm_prime_sg_to_page_addr_arrays(sgt, etnaviv_obj->pages, | |
138 | NULL, npages); | |
139 | if (ret) | |
140 | goto fail; | |
141 | ||
142 | ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base); | |
143 | if (ret) | |
144 | goto fail; | |
145 | ||
146 | return &etnaviv_obj->base; | |
147 | ||
148 | fail: | |
149 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
150 | ||
151 | return ERR_PTR(ret); | |
152 | } |