tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
32static __inline__ void *drm_calloc_large(size_t nmemb, size_t size)
33{
34 if (size != 0 && nmemb > SIZE_MAX / size)
35 return NULL;
36
37 if (size * nmemb <= PAGE_SIZE)
38 return kcalloc(nmemb, size, GFP_KERNEL);
39
40 return vzalloc(size * nmemb);
41}
42
43/* Modeled after cairo's malloc_ab, it's like calloc but without the zeroing. */
44static __inline__ void *drm_malloc_ab(size_t nmemb, size_t size)
45{
46 if (size != 0 && nmemb > SIZE_MAX / size)
47 return NULL;
48
49 if (size * nmemb <= PAGE_SIZE)
50 return kmalloc(nmemb * size, GFP_KERNEL);
51
52 return vmalloc(size * nmemb);
53}
54
55static __inline__ void *drm_malloc_gfp(size_t nmemb, size_t size, gfp_t gfp)
56{
57 if (size != 0 && nmemb > SIZE_MAX / size)
58 return NULL;
59
60 if (size * nmemb <= PAGE_SIZE)
61 return kmalloc(nmemb * size, gfp);
62
63 if (gfp & __GFP_RECLAIMABLE) {
64 void *ptr = kmalloc(nmemb * size,
65 gfp | __GFP_NOWARN | __GFP_NORETRY);
66 if (ptr)
67 return ptr;
68 }
69
70 return __vmalloc(size * nmemb, gfp, PAGE_KERNEL);
71}
72
73static __inline void drm_free_large(void *ptr)
74{
75 kvfree(ptr);
76}
77
78#endif