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 > 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. */ 45static __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 57static __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 66