Commit | Line | Data |
---|---|---|
f6ffbd4f | 1 | // SPDX-License-Identifier: GPL-2.0 |
a8c21a54 | 2 | /* |
f6ffbd4f | 3 | * Copyright (C) 2014-2018 Etnaviv Project |
a8c21a54 T |
4 | */ |
5 | ||
6eae41fe | 6 | #include <drm/drm_prime.h> |
a8c21a54 | 7 | #include <linux/dma-buf.h> |
6eae41fe | 8 | |
a8c21a54 T |
9 | #include "etnaviv_drv.h" |
10 | #include "etnaviv_gem.h" | |
11 | ||
d6a8743d | 12 | static struct lock_class_key etnaviv_prime_lock_class; |
a8c21a54 T |
13 | |
14 | struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj) | |
15 | { | |
16 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
5f4a4a73 | 17 | int npages = obj->size >> PAGE_SHIFT; |
a8c21a54 | 18 | |
5f4a4a73 | 19 | if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */ |
9e053523 | 20 | return ERR_PTR(-EINVAL); |
a8c21a54 | 21 | |
707d561f | 22 | return drm_prime_pages_to_sg(obj->dev, etnaviv_obj->pages, npages); |
a8c21a54 T |
23 | } |
24 | ||
25 | void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj) | |
26 | { | |
ce3088fd | 27 | return etnaviv_gem_vmap(obj); |
a8c21a54 T |
28 | } |
29 | ||
30 | void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) | |
31 | { | |
32 | /* TODO msm_gem_vunmap() */ | |
33 | } | |
34 | ||
5688e57e LS |
35 | int etnaviv_gem_prime_mmap(struct drm_gem_object *obj, |
36 | struct vm_area_struct *vma) | |
37 | { | |
38 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
39 | int ret; | |
40 | ||
41 | ret = drm_gem_mmap_obj(obj, obj->size, vma); | |
42 | if (ret < 0) | |
43 | return ret; | |
44 | ||
45 | return etnaviv_obj->ops->mmap(etnaviv_obj, vma); | |
46 | } | |
47 | ||
a8c21a54 T |
48 | int etnaviv_gem_prime_pin(struct drm_gem_object *obj) |
49 | { | |
50 | if (!obj->import_attach) { | |
51 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
52 | ||
53 | mutex_lock(&etnaviv_obj->lock); | |
54 | etnaviv_gem_get_pages(etnaviv_obj); | |
55 | mutex_unlock(&etnaviv_obj->lock); | |
56 | } | |
57 | return 0; | |
58 | } | |
59 | ||
60 | void etnaviv_gem_prime_unpin(struct drm_gem_object *obj) | |
61 | { | |
62 | if (!obj->import_attach) { | |
63 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
64 | ||
65 | mutex_lock(&etnaviv_obj->lock); | |
66 | etnaviv_gem_put_pages(to_etnaviv_bo(obj)); | |
67 | mutex_unlock(&etnaviv_obj->lock); | |
68 | } | |
69 | } | |
70 | ||
71 | static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj) | |
72 | { | |
73 | if (etnaviv_obj->vaddr) | |
74 | dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf, | |
75 | etnaviv_obj->vaddr); | |
76 | ||
77 | /* Don't drop the pages for imported dmabuf, as they are not | |
78 | * ours, just free the array we allocated: | |
79 | */ | |
80 | if (etnaviv_obj->pages) | |
2098105e | 81 | kvfree(etnaviv_obj->pages); |
a8c21a54 T |
82 | |
83 | drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt); | |
84 | } | |
85 | ||
a0a5ab3e LS |
86 | static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj) |
87 | { | |
6619ccf1 TZ |
88 | struct dma_buf_map map; |
89 | int ret; | |
90 | ||
a0a5ab3e LS |
91 | lockdep_assert_held(&etnaviv_obj->lock); |
92 | ||
6619ccf1 TZ |
93 | ret = dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf, &map); |
94 | if (ret) | |
95 | return NULL; | |
96 | return map.vaddr; | |
a0a5ab3e LS |
97 | } |
98 | ||
a10e2bde LS |
99 | static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
100 | struct vm_area_struct *vma) | |
101 | { | |
102 | return dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0); | |
103 | } | |
104 | ||
a8c21a54 T |
105 | static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = { |
106 | /* .get_pages should never be called */ | |
107 | .release = etnaviv_gem_prime_release, | |
a0a5ab3e | 108 | .vmap = etnaviv_gem_prime_vmap_impl, |
a10e2bde | 109 | .mmap = etnaviv_gem_prime_mmap_obj, |
a8c21a54 T |
110 | }; |
111 | ||
112 | struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev, | |
113 | struct dma_buf_attachment *attach, struct sg_table *sgt) | |
114 | { | |
115 | struct etnaviv_gem_object *etnaviv_obj; | |
116 | size_t size = PAGE_ALIGN(attach->dmabuf->size); | |
117 | int ret, npages; | |
118 | ||
119 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC, | |
a8c21a54 T |
120 | &etnaviv_gem_prime_ops, &etnaviv_obj); |
121 | if (ret < 0) | |
122 | return ERR_PTR(ret); | |
123 | ||
d6a8743d LS |
124 | lockdep_set_class(&etnaviv_obj->lock, &etnaviv_prime_lock_class); |
125 | ||
a8c21a54 T |
126 | npages = size / PAGE_SIZE; |
127 | ||
128 | etnaviv_obj->sgt = sgt; | |
2098105e | 129 | etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); |
a8c21a54 T |
130 | if (!etnaviv_obj->pages) { |
131 | ret = -ENOMEM; | |
132 | goto fail; | |
133 | } | |
134 | ||
135 | ret = drm_prime_sg_to_page_addr_arrays(sgt, etnaviv_obj->pages, | |
136 | NULL, npages); | |
137 | if (ret) | |
138 | goto fail; | |
139 | ||
54f09288 | 140 | etnaviv_gem_obj_add(dev, &etnaviv_obj->base); |
a8c21a54 T |
141 | |
142 | return &etnaviv_obj->base; | |
143 | ||
144 | fail: | |
6780bf32 | 145 | drm_gem_object_put(&etnaviv_obj->base); |
a8c21a54 T |
146 | |
147 | return ERR_PTR(ret); | |
148 | } |