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
|
/**************************************************************************
* Copyright (c) 2011, Intel Corporation.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
**************************************************************************/
#include <drm/drmP.h>
#include <drm/drm.h>
#include "gem_glue.h"
void drm_gem_object_release_wrap(struct drm_gem_object *obj)
{
/* Remove the list map if one is present */
if (obj->map_list.map) {
struct drm_gem_mm *mm = obj->dev->mm_private;
struct drm_map_list *list = &obj->map_list;
drm_ht_remove_item(&mm->offset_hash, &list->hash);
drm_mm_put_block(list->file_offset_node);
kfree(list->map);
list->map = NULL;
}
drm_gem_object_release(obj);
}
/**
* gem_create_mmap_offset - invent an mmap offset
* @obj: our object
*
* Standard implementation of offset generation for mmap as is
* duplicated in several drivers. This belongs in GEM.
*/
int gem_create_mmap_offset(struct drm_gem_object *obj)
{
struct drm_device *dev = obj->dev;
struct drm_gem_mm *mm = dev->mm_private;
struct drm_map_list *list;
struct drm_local_map *map;
int ret;
list = &obj->map_list;
list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL);
if (list->map == NULL)
return -ENOMEM;
map = list->map;
map->type = _DRM_GEM;
map->size = obj->size;
map->handle = obj;
list->file_offset_node = drm_mm_search_free(&mm->offset_manager,
obj->size / PAGE_SIZE, 0, 0);
if (!list->file_offset_node) {
dev_err(dev->dev, "failed to allocate offset for bo %d\n",
obj->name);
ret = -ENOSPC;
goto free_it;
}
list->file_offset_node = drm_mm_get_block(list->file_offset_node,
obj->size / PAGE_SIZE, 0);
if (!list->file_offset_node) {
ret = -ENOMEM;
goto free_it;
}
list->hash.key = list->file_offset_node->start;
ret = drm_ht_insert_item(&mm->offset_hash, &list->hash);
if (ret) {
dev_err(dev->dev, "failed to add to map hash\n");
goto free_mm;
}
return 0;
free_mm:
drm_mm_put_block(list->file_offset_node);
free_it:
kfree(list->map);
list->map = NULL;
return ret;
}
|
