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1 | /* |
2 | * Copyright © 2008 Intel Corporation |
3 | * |
4 | * Permission is hereby granted, free of charge, to any person obtaining a |
5 | * copy of this software and associated documentation files (the "Software"), |
6 | * to deal in the Software without restriction, including without limitation |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
8 | * and/or sell copies of the Software, and to permit persons to whom the |
9 | * Software is furnished to do so, subject to the following conditions: |
10 | * |
11 | * The above copyright notice and this permission notice (including the next |
12 | * paragraph) shall be included in all copies or substantial portions of the |
13 | * Software. |
14 | * |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
21 | * IN THE SOFTWARE. |
22 | * |
23 | * Authors: |
24 | * Jesse Barnes <jbarnes@virtuousgeek.org> |
25 | * |
26 | */ |
27 | #ifndef _DRM_MEM_UTIL_H_ |
28 | #define _DRM_MEM_UTIL_H_ |
29 | |
30 | #include <linux/vmalloc.h> |
31 | |
32 | static __inline__ void *drm_calloc_large(size_t nmemb, size_t size) |
33 | { |
34 | if (size != 0 && nmemb > ULONG_MAX / size) |
35 | return NULL; |
36 | |
37 | if (size * nmemb <= PAGE_SIZE) |
38 | return kcalloc(nmemb, size, GFP_KERNEL); |
39 | |
40 | return __vmalloc(size * nmemb, |
41 | GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO, PAGE_KERNEL); |
42 | } |
43 | |
44 | /* Modeled after cairo's malloc_ab, it's like calloc but without the zeroing. */ |
45 | static __inline__ void *drm_malloc_ab(size_t nmemb, size_t size) |
46 | { |
47 | if (size != 0 && nmemb > ULONG_MAX / size) |
48 | return NULL; |
49 | |
50 | if (size * nmemb <= PAGE_SIZE) |
51 | return kmalloc(nmemb * size, GFP_KERNEL); |
52 | |
53 | return __vmalloc(size * nmemb, |
54 | GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL); |
55 | } |
56 | |
57 | static __inline void drm_free_large(void *ptr) |
58 | { |
59 | if (!is_vmalloc_addr(ptr)) |
60 | return kfree(ptr); |
61 | |
62 | vfree(ptr); |
63 | } |
64 | |
65 | #endif |
66 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9