1 /* $OpenBSD: drm_memory.c,v 1.27 2015/06/04 06:07:23 jsg Exp $ */ 2 /*- 3 *Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 4 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the next 15 * paragraph) shall be included in all copies or substantial portions of the 16 * Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 24 * OTHER DEALINGS IN THE SOFTWARE. 25 * 26 * Authors: 27 * Rickard E. (Rik) Faith <faith@valinux.com> 28 * Gareth Hughes <gareth@valinux.com> 29 * 30 */ 31 32 /** @file drm_memory.c 33 * Wrappers for kernel memory allocation routines, and MTRR management support. 34 * 35 * This file previously implemented a memory consumption tracking system using 36 * the "area" argument for various different types of allocations, but that 37 * has been stripped out for now. 38 */ 39 40 #include "drmP.h" 41 42 #if !defined(__amd64__) && !defined(__i386__) 43 #define DRM_NO_MTRR 1 44 #endif 45 46 void* 47 drm_alloc(size_t size) 48 { 49 return (malloc(size, M_DRM, M_NOWAIT)); 50 } 51 52 void * 53 drm_calloc(size_t nmemb, size_t size) 54 { 55 if (nmemb == 0 || SIZE_MAX / nmemb < size) 56 return (NULL); 57 else 58 return mallocarray(size, nmemb, M_DRM, M_NOWAIT | M_ZERO); 59 } 60 61 void * 62 drm_realloc(void *oldpt, size_t oldsize, size_t size) 63 { 64 void *pt; 65 66 pt = malloc(size, M_DRM, M_NOWAIT); 67 if (pt == NULL) 68 return NULL; 69 if (oldpt && oldsize) { 70 memcpy(pt, oldpt, min(oldsize, size)); 71 free(oldpt, M_DRM, 0); 72 } 73 return pt; 74 } 75 76 void 77 drm_free(void *pt) 78 { 79 if (pt != NULL) 80 free(pt, M_DRM, 0); 81 } 82 83 int 84 drm_mtrr_add(unsigned long offset, size_t size, int flags) 85 { 86 #ifndef DRM_NO_MTRR 87 int act; 88 struct mem_range_desc mrdesc; 89 90 mrdesc.mr_base = offset; 91 mrdesc.mr_len = size; 92 mrdesc.mr_flags = flags; 93 act = MEMRANGE_SET_UPDATE; 94 strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner)); 95 return mem_range_attr_set(&mrdesc, &act); 96 #else 97 return 0; 98 #endif 99 } 100 101 int 102 drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags) 103 { 104 #ifndef DRM_NO_MTRR 105 int act; 106 struct mem_range_desc mrdesc; 107 108 mrdesc.mr_base = offset; 109 mrdesc.mr_len = size; 110 mrdesc.mr_flags = flags; 111 act = MEMRANGE_SET_REMOVE; 112 strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner)); 113 return mem_range_attr_set(&mrdesc, &act); 114 #else 115 return 0; 116 #endif 117 } 118