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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 | ||
d6a8743d | 22 | static struct lock_class_key etnaviv_prime_lock_class; |
a8c21a54 T |
23 | |
24 | struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj) | |
25 | { | |
26 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
5f4a4a73 | 27 | int npages = obj->size >> PAGE_SHIFT; |
a8c21a54 | 28 | |
5f4a4a73 LS |
29 | if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */ |
30 | return NULL; | |
a8c21a54 | 31 | |
5f4a4a73 | 32 | return drm_prime_pages_to_sg(etnaviv_obj->pages, npages); |
a8c21a54 T |
33 | } |
34 | ||
35 | void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj) | |
36 | { | |
ce3088fd | 37 | return etnaviv_gem_vmap(obj); |
a8c21a54 T |
38 | } |
39 | ||
40 | void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) | |
41 | { | |
42 | /* TODO msm_gem_vunmap() */ | |
43 | } | |
44 | ||
5688e57e LS |
45 | int etnaviv_gem_prime_mmap(struct drm_gem_object *obj, |
46 | struct vm_area_struct *vma) | |
47 | { | |
48 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
49 | int ret; | |
50 | ||
51 | ret = drm_gem_mmap_obj(obj, obj->size, vma); | |
52 | if (ret < 0) | |
53 | return ret; | |
54 | ||
55 | return etnaviv_obj->ops->mmap(etnaviv_obj, vma); | |
56 | } | |
57 | ||
a8c21a54 T |
58 | int etnaviv_gem_prime_pin(struct drm_gem_object *obj) |
59 | { | |
60 | if (!obj->import_attach) { | |
61 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
62 | ||
63 | mutex_lock(&etnaviv_obj->lock); | |
64 | etnaviv_gem_get_pages(etnaviv_obj); | |
65 | mutex_unlock(&etnaviv_obj->lock); | |
66 | } | |
67 | return 0; | |
68 | } | |
69 | ||
70 | void etnaviv_gem_prime_unpin(struct drm_gem_object *obj) | |
71 | { | |
72 | if (!obj->import_attach) { | |
73 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
74 | ||
75 | mutex_lock(&etnaviv_obj->lock); | |
76 | etnaviv_gem_put_pages(to_etnaviv_bo(obj)); | |
77 | mutex_unlock(&etnaviv_obj->lock); | |
78 | } | |
79 | } | |
80 | ||
81 | static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj) | |
82 | { | |
83 | if (etnaviv_obj->vaddr) | |
84 | dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf, | |
85 | etnaviv_obj->vaddr); | |
86 | ||
87 | /* Don't drop the pages for imported dmabuf, as they are not | |
88 | * ours, just free the array we allocated: | |
89 | */ | |
90 | if (etnaviv_obj->pages) | |
2098105e | 91 | kvfree(etnaviv_obj->pages); |
a8c21a54 T |
92 | |
93 | drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt); | |
94 | } | |
95 | ||
a0a5ab3e LS |
96 | static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj) |
97 | { | |
98 | lockdep_assert_held(&etnaviv_obj->lock); | |
99 | ||
100 | return dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf); | |
101 | } | |
102 | ||
a10e2bde LS |
103 | static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
104 | struct vm_area_struct *vma) | |
105 | { | |
106 | return dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0); | |
107 | } | |
108 | ||
a8c21a54 T |
109 | static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = { |
110 | /* .get_pages should never be called */ | |
111 | .release = etnaviv_gem_prime_release, | |
a0a5ab3e | 112 | .vmap = etnaviv_gem_prime_vmap_impl, |
a10e2bde | 113 | .mmap = etnaviv_gem_prime_mmap_obj, |
a8c21a54 T |
114 | }; |
115 | ||
116 | struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev, | |
117 | struct dma_buf_attachment *attach, struct sg_table *sgt) | |
118 | { | |
119 | struct etnaviv_gem_object *etnaviv_obj; | |
120 | size_t size = PAGE_ALIGN(attach->dmabuf->size); | |
121 | int ret, npages; | |
122 | ||
123 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC, | |
124 | attach->dmabuf->resv, | |
125 | &etnaviv_gem_prime_ops, &etnaviv_obj); | |
126 | if (ret < 0) | |
127 | return ERR_PTR(ret); | |
128 | ||
d6a8743d LS |
129 | lockdep_set_class(&etnaviv_obj->lock, &etnaviv_prime_lock_class); |
130 | ||
a8c21a54 T |
131 | npages = size / PAGE_SIZE; |
132 | ||
133 | etnaviv_obj->sgt = sgt; | |
2098105e | 134 | etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); |
a8c21a54 T |
135 | if (!etnaviv_obj->pages) { |
136 | ret = -ENOMEM; | |
137 | goto fail; | |
138 | } | |
139 | ||
140 | ret = drm_prime_sg_to_page_addr_arrays(sgt, etnaviv_obj->pages, | |
141 | NULL, npages); | |
142 | if (ret) | |
143 | goto fail; | |
144 | ||
54f09288 | 145 | etnaviv_gem_obj_add(dev, &etnaviv_obj->base); |
a8c21a54 T |
146 | |
147 | return &etnaviv_obj->base; | |
148 | ||
149 | fail: | |
23d1dd03 | 150 | drm_gem_object_put_unlocked(&etnaviv_obj->base); |
a8c21a54 T |
151 | |
152 | return ERR_PTR(ret); | |
153 | } | |
8555137e EA |
154 | |
155 | struct reservation_object *etnaviv_gem_prime_res_obj(struct drm_gem_object *obj) | |
156 | { | |
157 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
158 | ||
159 | return etnaviv_obj->resv; | |
160 | } |