1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/dma-buf.h>
#include "etnaviv_drv.h"
#include "etnaviv_gem.h"
struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj)
{
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
int npages = obj->size >> PAGE_SHIFT;
if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */
return NULL;
return drm_prime_pages_to_sg(etnaviv_obj->pages, npages);
}
void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj)
{
return etnaviv_gem_vmap(obj);
}
void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
{
/* TODO msm_gem_vunmap() */
}
int etnaviv_gem_prime_mmap(struct drm_gem_object *obj,
struct vm_area_struct *vma)
{
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
int ret;
ret = drm_gem_mmap_obj(obj, obj->size, vma);
if (ret < 0)
return ret;
return etnaviv_obj->ops->mmap(etnaviv_obj, vma);
}
int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
{
if (!obj->import_attach) {
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
mutex_lock(&etnaviv_obj->lock);
etnaviv_gem_get_pages(etnaviv_obj);
mutex_unlock(&etnaviv_obj->lock);
}
return 0;
}
void etnaviv_gem_prime_unpin(struct drm_gem_object *obj)
{
if (!obj->import_attach) {
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
mutex_lock(&etnaviv_obj->lock);
etnaviv_gem_put_pages(to_etnaviv_bo(obj));
mutex_unlock(&etnaviv_obj->lock);
}
}
static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj)
{
if (etnaviv_obj->vaddr)
dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf,
etnaviv_obj->vaddr);
/* Don't drop the pages for imported dmabuf, as they are not
* ours, just free the array we allocated:
*/
if (etnaviv_obj->pages)
kvfree(etnaviv_obj->pages);
drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt);
}
static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj)
{
lockdep_assert_held(&etnaviv_obj->lock);
return dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf);
}
static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
struct vm_area_struct *vma)
{
return dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0);
}
static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = {
/* .get_pages should never be called */
.release = etnaviv_gem_prime_release,
.vmap = etnaviv_gem_prime_vmap_impl,
.mmap = etnaviv_gem_prime_mmap_obj,
};
struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach, struct sg_table *sgt)
{
struct etnaviv_gem_object *etnaviv_obj;
size_t size = PAGE_ALIGN(attach->dmabuf->size);
int ret, npages;
ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC,
attach->dmabuf->resv,
&etnaviv_gem_prime_ops, &etnaviv_obj);
if (ret < 0)
return ERR_PTR(ret);
npages = size / PAGE_SIZE;
etnaviv_obj->sgt = sgt;
etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
if (!etnaviv_obj->pages) {
ret = -ENOMEM;
goto fail;
}
ret = drm_prime_sg_to_page_addr_arrays(sgt, etnaviv_obj->pages,
NULL, npages);
if (ret)
goto fail;
ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
if (ret)
goto fail;
return &etnaviv_obj->base;
fail:
drm_gem_object_put_unlocked(&etnaviv_obj->base);
return ERR_PTR(ret);
}
struct reservation_object *etnaviv_gem_prime_res_obj(struct drm_gem_object *obj)
{
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
return etnaviv_obj->resv;
}
|
