2 * Copyright © 2008 Intel Corporation
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:
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
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
24 * Jesse Barnes <jbarnes@virtuousgeek.org>
27 #ifndef _DRM_MEM_UTIL_H_
28 #define _DRM_MEM_UTIL_H_
30 #include <linux/vmalloc.h>
32 static __inline__
void *drm_calloc_large(size_t nmemb
, size_t size
)
34 if (size
!= 0 && nmemb
> SIZE_MAX
/ size
)
37 if (size
* nmemb
<= PAGE_SIZE
)
38 return kcalloc(nmemb
, size
, GFP_KERNEL
);
40 return __vmalloc(size
* nmemb
,
41 GFP_KERNEL
| __GFP_HIGHMEM
| __GFP_ZERO
, PAGE_KERNEL
);
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
)
47 if (size
!= 0 && nmemb
> SIZE_MAX
/ size
)
50 if (size
* nmemb
<= PAGE_SIZE
)
51 return kmalloc(nmemb
* size
, GFP_KERNEL
);
53 return __vmalloc(size
* nmemb
,
54 GFP_KERNEL
| __GFP_HIGHMEM
, PAGE_KERNEL
);
57 static __inline
void drm_free_large(void *ptr
)
59 if (!is_vmalloc_addr(ptr
))