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 __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. */
45static __inline__ void *drm_malloc_ab(size_t nmemb, size_t size)
46{
47	if (size != 0 && nmemb > SIZE_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
57static __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
76static __inline void drm_free_large(void *ptr)
77{
78	kvfree(ptr);
79}
80
81#endif