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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2014-2018 Etnaviv Project
4 */
5
6#include <drm/drm_prime.h>
7#include <linux/dma-buf.h>
8
9#include "etnaviv_drv.h"
10#include "etnaviv_gem.h"
11
12static struct lock_class_key etnaviv_prime_lock_class;
13
14struct 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);
17 int npages = obj->size >> PAGE_SHIFT;
18
19 if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */
20 return ERR_PTR(-EINVAL);
21
22 return drm_prime_pages_to_sg(etnaviv_obj->pages, npages);
23}
24
25void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj)
26{
27 return etnaviv_gem_vmap(obj);
28}
29
30void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
31{
32 /* TODO msm_gem_vunmap() */
33}
34
35int 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
48int 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
60void 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
71static 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)
81 kvfree(etnaviv_obj->pages);
82
83 drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt);
84}
85
86static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj)
87{
88 lockdep_assert_held(&etnaviv_obj->lock);
89
90 return dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf);
91}
92
93static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
94 struct vm_area_struct *vma)
95{
96 return dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0);
97}
98
99static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = {
100 /* .get_pages should never be called */
101 .release = etnaviv_gem_prime_release,
102 .vmap = etnaviv_gem_prime_vmap_impl,
103 .mmap = etnaviv_gem_prime_mmap_obj,
104};
105
106struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,
107 struct dma_buf_attachment *attach, struct sg_table *sgt)
108{
109 struct etnaviv_gem_object *etnaviv_obj;
110 size_t size = PAGE_ALIGN(attach->dmabuf->size);
111 int ret, npages;
112
113 ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC,
114 &etnaviv_gem_prime_ops, &etnaviv_obj);
115 if (ret < 0)
116 return ERR_PTR(ret);
117
118 lockdep_set_class(&etnaviv_obj->lock, &etnaviv_prime_lock_class);
119
120 npages = size / PAGE_SIZE;
121
122 etnaviv_obj->sgt = sgt;
123 etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
124 if (!etnaviv_obj->pages) {
125 ret = -ENOMEM;
126 goto fail;
127 }
128
129 ret = drm_prime_sg_to_page_addr_arrays(sgt, etnaviv_obj->pages,
130 NULL, npages);
131 if (ret)
132 goto fail;
133
134 etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
135
136 return &etnaviv_obj->base;
137
138fail:
139 drm_gem_object_put_unlocked(&etnaviv_obj->base);
140
141 return ERR_PTR(ret);
142}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2014-2018 Etnaviv Project
4 */
5
6#include <drm/drm_prime.h>
7#include <linux/dma-buf.h>
8#include <linux/module.h>
9
10#include "etnaviv_drv.h"
11#include "etnaviv_gem.h"
12
13MODULE_IMPORT_NS(DMA_BUF);
14
15static struct lock_class_key etnaviv_prime_lock_class;
16
17struct 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);
20 int npages = obj->size >> PAGE_SHIFT;
21
22 if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */
23 return ERR_PTR(-EINVAL);
24
25 return drm_prime_pages_to_sg(obj->dev, etnaviv_obj->pages, npages);
26}
27
28int etnaviv_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
29{
30 void *vaddr;
31
32 vaddr = etnaviv_gem_vmap(obj);
33 if (!vaddr)
34 return -ENOMEM;
35 iosys_map_set_vaddr(map, vaddr);
36
37 return 0;
38}
39
40int 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
52void 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
63static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj)
64{
65 struct iosys_map map = IOSYS_MAP_INIT_VADDR(etnaviv_obj->vaddr);
66
67 if (etnaviv_obj->vaddr)
68 dma_buf_vunmap_unlocked(etnaviv_obj->base.import_attach->dmabuf, &map);
69
70 /* Don't drop the pages for imported dmabuf, as they are not
71 * ours, just free the array we allocated:
72 */
73 kvfree(etnaviv_obj->pages);
74
75 drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt);
76}
77
78static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj)
79{
80 struct iosys_map map;
81 int ret;
82
83 lockdep_assert_held(&etnaviv_obj->lock);
84
85 ret = dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf, &map);
86 if (ret)
87 return NULL;
88 return map.vaddr;
89}
90
91static 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
97static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = {
98 /* .get_pages should never be called */
99 .release = etnaviv_gem_prime_release,
100 .vmap = etnaviv_gem_prime_vmap_impl,
101 .mmap = etnaviv_gem_prime_mmap_obj,
102};
103
104struct 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,
112 &etnaviv_gem_prime_ops, &etnaviv_obj);
113 if (ret < 0)
114 return ERR_PTR(ret);
115
116 lockdep_set_class(&etnaviv_obj->lock, &etnaviv_prime_lock_class);
117
118 npages = size / PAGE_SIZE;
119
120 etnaviv_obj->sgt = sgt;
121 etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
122 if (!etnaviv_obj->pages) {
123 ret = -ENOMEM;
124 goto fail;
125 }
126
127 ret = drm_prime_sg_to_page_array(sgt, etnaviv_obj->pages, npages);
128 if (ret)
129 goto fail;
130
131 etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
132
133 return &etnaviv_obj->base;
134
135fail:
136 drm_gem_object_put(&etnaviv_obj->base);
137
138 return ERR_PTR(ret);
139}