diff options
Diffstat (limited to 'drivers/gpu/drm/gma500/gem_glue.c')
-rw-r--r-- | drivers/gpu/drm/gma500/gem_glue.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/gem_glue.c b/drivers/gpu/drm/gma500/gem_glue.c new file mode 100644 index 000000000000..daac12120653 --- /dev/null +++ b/drivers/gpu/drm/gma500/gem_glue.c | |||
@@ -0,0 +1,89 @@ | |||
1 | /************************************************************************** | ||
2 | * Copyright (c) 2011, Intel Corporation. | ||
3 | * All Rights Reserved. | ||
4 | * | ||
5 | * This program is free software; you can redistribute it and/or modify it | ||
6 | * under the terms and conditions of the GNU General Public License, | ||
7 | * version 2, as published by the Free Software Foundation. | ||
8 | * | ||
9 | * This program is distributed in the hope it will be useful, but WITHOUT | ||
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | ||
12 | * more details. | ||
13 | * | ||
14 | * You should have received a copy of the GNU General Public License along with | ||
15 | * this program; if not, write to the Free Software Foundation, Inc., | ||
16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | ||
17 | * | ||
18 | **************************************************************************/ | ||
19 | |||
20 | #include <drm/drmP.h> | ||
21 | #include <drm/drm.h> | ||
22 | |||
23 | void drm_gem_object_release_wrap(struct drm_gem_object *obj) | ||
24 | { | ||
25 | /* Remove the list map if one is present */ | ||
26 | if (obj->map_list.map) { | ||
27 | struct drm_gem_mm *mm = obj->dev->mm_private; | ||
28 | struct drm_map_list *list = &obj->map_list; | ||
29 | drm_ht_remove_item(&mm->offset_hash, &list->hash); | ||
30 | drm_mm_put_block(list->file_offset_node); | ||
31 | kfree(list->map); | ||
32 | list->map = NULL; | ||
33 | } | ||
34 | drm_gem_object_release(obj); | ||
35 | } | ||
36 | |||
37 | /** | ||
38 | * gem_create_mmap_offset - invent an mmap offset | ||
39 | * @obj: our object | ||
40 | * | ||
41 | * Standard implementation of offset generation for mmap as is | ||
42 | * duplicated in several drivers. This belongs in GEM. | ||
43 | */ | ||
44 | int gem_create_mmap_offset(struct drm_gem_object *obj) | ||
45 | { | ||
46 | struct drm_device *dev = obj->dev; | ||
47 | struct drm_gem_mm *mm = dev->mm_private; | ||
48 | struct drm_map_list *list; | ||
49 | struct drm_local_map *map; | ||
50 | int ret; | ||
51 | |||
52 | list = &obj->map_list; | ||
53 | list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); | ||
54 | if (list->map == NULL) | ||
55 | return -ENOMEM; | ||
56 | map = list->map; | ||
57 | map->type = _DRM_GEM; | ||
58 | map->size = obj->size; | ||
59 | map->handle = obj; | ||
60 | |||
61 | list->file_offset_node = drm_mm_search_free(&mm->offset_manager, | ||
62 | obj->size / PAGE_SIZE, 0, 0); | ||
63 | if (!list->file_offset_node) { | ||
64 | dev_err(dev->dev, "failed to allocate offset for bo %d\n", | ||
65 | obj->name); | ||
66 | ret = -ENOSPC; | ||
67 | goto free_it; | ||
68 | } | ||
69 | list->file_offset_node = drm_mm_get_block(list->file_offset_node, | ||
70 | obj->size / PAGE_SIZE, 0); | ||
71 | if (!list->file_offset_node) { | ||
72 | ret = -ENOMEM; | ||
73 | goto free_it; | ||
74 | } | ||
75 | list->hash.key = list->file_offset_node->start; | ||
76 | ret = drm_ht_insert_item(&mm->offset_hash, &list->hash); | ||
77 | if (ret) { | ||
78 | dev_err(dev->dev, "failed to add to map hash\n"); | ||
79 | goto free_mm; | ||
80 | } | ||
81 | return 0; | ||
82 | |||
83 | free_mm: | ||
84 | drm_mm_put_block(list->file_offset_node); | ||
85 | free_it: | ||
86 | kfree(list->map); | ||
87 | list->map = NULL; | ||
88 | return ret; | ||
89 | } | ||