1 /* $OpenBSD: drm_memory.c,v 1.28 2019/04/14 10:14:51 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 MTRR management support. 34 */ 35 36 #include <drm/drmP.h> 37 38 #if !defined(__amd64__) && !defined(__i386__) 39 #define DRM_NO_MTRR 1 40 #endif 41 42 int 43 drm_mtrr_add(unsigned long offset, size_t size, int flags) 44 { 45 #ifndef DRM_NO_MTRR 46 int act; 47 struct mem_range_desc mrdesc; 48 49 mrdesc.mr_base = offset; 50 mrdesc.mr_len = size; 51 mrdesc.mr_flags = flags; 52 act = MEMRANGE_SET_UPDATE; 53 strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner)); 54 return mem_range_attr_set(&mrdesc, &act); 55 #else 56 return 0; 57 #endif 58 } 59 60 int 61 drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags) 62 { 63 #ifndef DRM_NO_MTRR 64 int act; 65 struct mem_range_desc mrdesc; 66 67 mrdesc.mr_base = offset; 68 mrdesc.mr_len = size; 69 mrdesc.mr_flags = flags; 70 act = MEMRANGE_SET_REMOVE; 71 strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner)); 72 return mem_range_attr_set(&mrdesc, &act); 73 #else 74 return 0; 75 #endif 76 } 77