projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 72e942dd DA |
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 <[email protected]> | |
| 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 |