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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 | { | |
a3860c1c | 34 | if (size != 0 && nmemb > SIZE_MAX / size) |
72e942dd DA |
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 | { | |
a3860c1c | 47 | if (size != 0 && nmemb > SIZE_MAX / size) |
72e942dd DA |
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 | ||
f2a85e19 CW |
57 | static __inline__ void *drm_malloc_gfp(size_t nmemb, size_t size, gfp_t gfp) |
58 | { | |
59 | if (size != 0 && nmemb > SIZE_MAX / size) | |
60 | return NULL; | |
61 | ||
62 | if (size * nmemb <= PAGE_SIZE) | |
63 | return kmalloc(nmemb * size, gfp); | |
64 | ||
65 | if (gfp & __GFP_RECLAIMABLE) { | |
66 | void *ptr = kmalloc(nmemb * size, | |
67 | gfp | __GFP_NOWARN | __GFP_NORETRY); | |
68 | if (ptr) | |
69 | return ptr; | |
70 | } | |
71 | ||
72 | return __vmalloc(size * nmemb, | |
73 | gfp | __GFP_HIGHMEM, PAGE_KERNEL); | |
74 | } | |
75 | ||
72e942dd DA |
76 | static __inline void drm_free_large(void *ptr) |
77 | { | |
15e21cd1 | 78 | kvfree(ptr); |
72e942dd DA |
79 | } |
80 | ||
81 | #endif |