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> |
16b0314a | 8 | #include <linux/module.h> |
6eae41fe | 9 | |
a8c21a54 T |
10 | #include "etnaviv_drv.h" |
11 | #include "etnaviv_gem.h" | |
12 | ||
16b0314a GKH |
13 | MODULE_IMPORT_NS(DMA_BUF); |
14 | ||
d6a8743d | 15 | static struct lock_class_key etnaviv_prime_lock_class; |
a8c21a54 T |
16 | |
17 | struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj) | |
18 | { | |
19 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
5f4a4a73 | 20 | int npages = obj->size >> PAGE_SHIFT; |
a8c21a54 | 21 | |
5f4a4a73 | 22 | if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */ |
9e053523 | 23 | return ERR_PTR(-EINVAL); |
a8c21a54 | 24 | |
707d561f | 25 | return drm_prime_pages_to_sg(obj->dev, etnaviv_obj->pages, npages); |
a8c21a54 T |
26 | } |
27 | ||
7938f421 | 28 | int etnaviv_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map) |
a8c21a54 | 29 | { |
49a3f51d TZ |
30 | void *vaddr; |
31 | ||
32 | vaddr = etnaviv_gem_vmap(obj); | |
33 | if (!vaddr) | |
34 | return -ENOMEM; | |
7938f421 | 35 | iosys_map_set_vaddr(map, vaddr); |
49a3f51d TZ |
36 | |
37 | return 0; | |
a8c21a54 T |
38 | } |
39 | ||
a8c21a54 T |
40 | int etnaviv_gem_prime_pin(struct drm_gem_object *obj) |
41 | { | |
42 | if (!obj->import_attach) { | |
43 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
44 | ||
45 | mutex_lock(&etnaviv_obj->lock); | |
46 | etnaviv_gem_get_pages(etnaviv_obj); | |
47 | mutex_unlock(&etnaviv_obj->lock); | |
48 | } | |
49 | return 0; | |
50 | } | |
51 | ||
52 | void etnaviv_gem_prime_unpin(struct drm_gem_object *obj) | |
53 | { | |
54 | if (!obj->import_attach) { | |
55 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
56 | ||
57 | mutex_lock(&etnaviv_obj->lock); | |
58 | etnaviv_gem_put_pages(to_etnaviv_bo(obj)); | |
59 | mutex_unlock(&etnaviv_obj->lock); | |
60 | } | |
61 | } | |
62 | ||
63 | static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj) | |
64 | { | |
7938f421 | 65 | struct iosys_map map = IOSYS_MAP_INIT_VADDR(etnaviv_obj->vaddr); |
20e76f1a | 66 | |
a8c21a54 | 67 | if (etnaviv_obj->vaddr) |
20e76f1a | 68 | dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf, &map); |
a8c21a54 T |
69 | |
70 | /* Don't drop the pages for imported dmabuf, as they are not | |
71 | * ours, just free the array we allocated: | |
72 | */ | |
7d614ab2 | 73 | kvfree(etnaviv_obj->pages); |
a8c21a54 T |
74 | |
75 | drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt); | |
76 | } | |
77 | ||
a0a5ab3e LS |
78 | static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj) |
79 | { | |
7938f421 | 80 | struct iosys_map map; |
6619ccf1 TZ |
81 | int ret; |
82 | ||
a0a5ab3e LS |
83 | lockdep_assert_held(&etnaviv_obj->lock); |
84 | ||
6619ccf1 TZ |
85 | ret = dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf, &map); |
86 | if (ret) | |
87 | return NULL; | |
88 | return map.vaddr; | |
a0a5ab3e LS |
89 | } |
90 | ||
a10e2bde LS |
91 | static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
92 | struct vm_area_struct *vma) | |
93 | { | |
94 | return dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0); | |
95 | } | |
96 | ||
a8c21a54 T |
97 | static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = { |
98 | /* .get_pages should never be called */ | |
99 | .release = etnaviv_gem_prime_release, | |
a0a5ab3e | 100 | .vmap = etnaviv_gem_prime_vmap_impl, |
a10e2bde | 101 | .mmap = etnaviv_gem_prime_mmap_obj, |
a8c21a54 T |
102 | }; |
103 | ||
104 | struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev, | |
105 | struct dma_buf_attachment *attach, struct sg_table *sgt) | |
106 | { | |
107 | struct etnaviv_gem_object *etnaviv_obj; | |
108 | size_t size = PAGE_ALIGN(attach->dmabuf->size); | |
109 | int ret, npages; | |
110 | ||
111 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC, | |
a8c21a54 T |
112 | &etnaviv_gem_prime_ops, &etnaviv_obj); |
113 | if (ret < 0) | |
114 | return ERR_PTR(ret); | |
115 | ||
d6a8743d LS |
116 | lockdep_set_class(&etnaviv_obj->lock, &etnaviv_prime_lock_class); |
117 | ||
a8c21a54 T |
118 | npages = size / PAGE_SIZE; |
119 | ||
120 | etnaviv_obj->sgt = sgt; | |
2098105e | 121 | etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); |
a8c21a54 T |
122 | if (!etnaviv_obj->pages) { |
123 | ret = -ENOMEM; | |
124 | goto fail; | |
125 | } | |
126 | ||
c67e6279 | 127 | ret = drm_prime_sg_to_page_array(sgt, etnaviv_obj->pages, npages); |
a8c21a54 T |
128 | if (ret) |
129 | goto fail; | |
130 | ||
54f09288 | 131 | etnaviv_gem_obj_add(dev, &etnaviv_obj->base); |
a8c21a54 T |
132 | |
133 | return &etnaviv_obj->base; | |
134 | ||
135 | fail: | |
6780bf32 | 136 | drm_gem_object_put(&etnaviv_obj->base); |
a8c21a54 T |
137 | |
138 | return ERR_PTR(ret); | |
139 | } |