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 | ||
5688e57e LS |
30 | int etnaviv_gem_prime_mmap(struct drm_gem_object *obj, |
31 | struct vm_area_struct *vma) | |
32 | { | |
33 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
34 | int ret; | |
35 | ||
36 | ret = drm_gem_mmap_obj(obj, obj->size, vma); | |
37 | if (ret < 0) | |
38 | return ret; | |
39 | ||
40 | return etnaviv_obj->ops->mmap(etnaviv_obj, vma); | |
41 | } | |
42 | ||
a8c21a54 T |
43 | int etnaviv_gem_prime_pin(struct drm_gem_object *obj) |
44 | { | |
45 | if (!obj->import_attach) { | |
46 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
47 | ||
48 | mutex_lock(&etnaviv_obj->lock); | |
49 | etnaviv_gem_get_pages(etnaviv_obj); | |
50 | mutex_unlock(&etnaviv_obj->lock); | |
51 | } | |
52 | return 0; | |
53 | } | |
54 | ||
55 | void etnaviv_gem_prime_unpin(struct drm_gem_object *obj) | |
56 | { | |
57 | if (!obj->import_attach) { | |
58 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
59 | ||
60 | mutex_lock(&etnaviv_obj->lock); | |
61 | etnaviv_gem_put_pages(to_etnaviv_bo(obj)); | |
62 | mutex_unlock(&etnaviv_obj->lock); | |
63 | } | |
64 | } | |
65 | ||
66 | static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj) | |
67 | { | |
20e76f1a TZ |
68 | struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(etnaviv_obj->vaddr); |
69 | ||
a8c21a54 | 70 | if (etnaviv_obj->vaddr) |
20e76f1a | 71 | dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf, &map); |
a8c21a54 T |
72 | |
73 | /* Don't drop the pages for imported dmabuf, as they are not | |
74 | * ours, just free the array we allocated: | |
75 | */ | |
76 | if (etnaviv_obj->pages) | |
2098105e | 77 | kvfree(etnaviv_obj->pages); |
a8c21a54 T |
78 | |
79 | drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt); | |
80 | } | |
81 | ||
a0a5ab3e LS |
82 | static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj) |
83 | { | |
6619ccf1 TZ |
84 | struct dma_buf_map map; |
85 | int ret; | |
86 | ||
a0a5ab3e LS |
87 | lockdep_assert_held(&etnaviv_obj->lock); |
88 | ||
6619ccf1 TZ |
89 | ret = dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf, &map); |
90 | if (ret) | |
91 | return NULL; | |
92 | return map.vaddr; | |
a0a5ab3e LS |
93 | } |
94 | ||
a10e2bde LS |
95 | static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
96 | struct vm_area_struct *vma) | |
97 | { | |
98 | return dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0); | |
99 | } | |
100 | ||
a8c21a54 T |
101 | static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = { |
102 | /* .get_pages should never be called */ | |
103 | .release = etnaviv_gem_prime_release, | |
a0a5ab3e | 104 | .vmap = etnaviv_gem_prime_vmap_impl, |
a10e2bde | 105 | .mmap = etnaviv_gem_prime_mmap_obj, |
a8c21a54 T |
106 | }; |
107 | ||
108 | struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev, | |
109 | struct dma_buf_attachment *attach, struct sg_table *sgt) | |
110 | { | |
111 | struct etnaviv_gem_object *etnaviv_obj; | |
112 | size_t size = PAGE_ALIGN(attach->dmabuf->size); | |
113 | int ret, npages; | |
114 | ||
115 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC, | |
a8c21a54 T |
116 | &etnaviv_gem_prime_ops, &etnaviv_obj); |
117 | if (ret < 0) | |
118 | return ERR_PTR(ret); | |
119 | ||
d6a8743d LS |
120 | lockdep_set_class(&etnaviv_obj->lock, &etnaviv_prime_lock_class); |
121 | ||
a8c21a54 T |
122 | npages = size / PAGE_SIZE; |
123 | ||
124 | etnaviv_obj->sgt = sgt; | |
2098105e | 125 | etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); |
a8c21a54 T |
126 | if (!etnaviv_obj->pages) { |
127 | ret = -ENOMEM; | |
128 | goto fail; | |
129 | } | |
130 | ||
131 | ret = drm_prime_sg_to_page_addr_arrays(sgt, etnaviv_obj->pages, | |
132 | NULL, npages); | |
133 | if (ret) | |
134 | goto fail; | |
135 | ||
54f09288 | 136 | etnaviv_gem_obj_add(dev, &etnaviv_obj->base); |
a8c21a54 T |
137 | |
138 | return &etnaviv_obj->base; | |
139 | ||
140 | fail: | |
6780bf32 | 141 | drm_gem_object_put(&etnaviv_obj->base); |
a8c21a54 T |
142 | |
143 | return ERR_PTR(ret); | |
144 | } |