| 1 | /* |
| 2 | * Copyright (c) 1993-2003 by The XFree86 Project, Inc. |
| 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 shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 20 | * OTHER DEALINGS IN THE SOFTWARE. |
| 21 | * |
| 22 | * Except as contained in this notice, the name of the copyright holder(s) |
| 23 | * and author(s) shall not be used in advertising or otherwise to promote |
| 24 | * the sale, use or other dealings in this Software without prior written |
| 25 | * authorization from the copyright holder(s) and author(s). |
| 26 | */ |
| 27 | |
| 28 | #ifdef HAVE_XORG_CONFIG_H |
| 29 | #include <xorg-config.h> |
| 30 | #endif |
| 31 | |
| 32 | #include <X11/X.h> |
| 33 | #include "input.h" |
| 34 | #include "scrnintstr.h" |
| 35 | |
| 36 | #include "xf86.h" |
| 37 | #include "xf86Priv.h" |
| 38 | #include "xf86_OSlib.h" |
| 39 | #include "xf86OSpriv.h" |
| 40 | |
| 41 | /* |
| 42 | * This file contains the common part of the video memory mapping functions |
| 43 | */ |
| 44 | |
| 45 | /* |
| 46 | * Get a piece of the ScrnInfoRec. At the moment, this is only used to hold |
| 47 | * the MTRR option information, but it is likely to be expanded if we do |
| 48 | * auto unmapping of memory at VT switch. |
| 49 | * |
| 50 | */ |
| 51 | |
| 52 | typedef struct { |
| 53 | unsigned long size; |
| 54 | pointer virtBase; |
| 55 | pointer mtrrInfo; |
| 56 | } MappingRec, *MappingPtr; |
| 57 | |
| 58 | typedef struct { |
| 59 | int numMappings; |
| 60 | MappingPtr *mappings; |
| 61 | Bool mtrrEnabled; |
| 62 | MessageType mtrrFrom; |
| 63 | Bool mtrrOptChecked; |
| 64 | ScrnInfoPtr pScrn; |
| 65 | } VidMapRec, *VidMapPtr; |
| 66 | |
| 67 | static int vidMapIndex = -1; |
| 68 | |
| 69 | #define VIDMAPPTR(p) ((VidMapPtr)((p)->privates[vidMapIndex].ptr)) |
| 70 | |
| 71 | static VidMemInfo vidMemInfo = { FALSE, }; |
| 72 | static VidMapRec vidMapRec = { 0, NULL, TRUE, X_DEFAULT, FALSE, NULL }; |
| 73 | |
| 74 | static VidMapPtr |
| 75 | getVidMapRec(int scrnIndex) |
| 76 | { |
| 77 | VidMapPtr vp; |
| 78 | ScrnInfoPtr pScrn; |
| 79 | |
| 80 | if ((scrnIndex < 0) || !(pScrn = xf86Screens[scrnIndex])) |
| 81 | return &vidMapRec; |
| 82 | |
| 83 | if (vidMapIndex < 0) |
| 84 | vidMapIndex = xf86AllocateScrnInfoPrivateIndex(); |
| 85 | |
| 86 | if (VIDMAPPTR(pScrn) != NULL) |
| 87 | return VIDMAPPTR(pScrn); |
| 88 | |
| 89 | vp = pScrn->privates[vidMapIndex].ptr = xnfcalloc(sizeof(VidMapRec), 1); |
| 90 | vp->mtrrEnabled = TRUE; /* default to enabled */ |
| 91 | vp->mtrrFrom = X_DEFAULT; |
| 92 | vp->mtrrOptChecked = FALSE; |
| 93 | vp->pScrn = pScrn; |
| 94 | return vp; |
| 95 | } |
| 96 | |
| 97 | static MappingPtr |
| 98 | newMapping(VidMapPtr vp) |
| 99 | { |
| 100 | vp->mappings = xnfrealloc(vp->mappings, sizeof(MappingPtr) * |
| 101 | (vp->numMappings + 1)); |
| 102 | vp->mappings[vp->numMappings] = xnfcalloc(sizeof(MappingRec), 1); |
| 103 | return vp->mappings[vp->numMappings++]; |
| 104 | } |
| 105 | |
| 106 | static MappingPtr |
| 107 | findMapping(VidMapPtr vp, pointer vbase, unsigned long size) |
| 108 | { |
| 109 | int i; |
| 110 | |
| 111 | for (i = 0; i < vp->numMappings; i++) { |
| 112 | if (vp->mappings[i]->virtBase == vbase && vp->mappings[i]->size == size) |
| 113 | return vp->mappings[i]; |
| 114 | } |
| 115 | return NULL; |
| 116 | } |
| 117 | |
| 118 | static void |
| 119 | removeMapping(VidMapPtr vp, MappingPtr mp) |
| 120 | { |
| 121 | int i, found = 0; |
| 122 | |
| 123 | for (i = 0; i < vp->numMappings; i++) { |
| 124 | if (vp->mappings[i] == mp) { |
| 125 | found = 1; |
| 126 | free(vp->mappings[i]); |
| 127 | } |
| 128 | else if (found) { |
| 129 | vp->mappings[i - 1] = vp->mappings[i]; |
| 130 | } |
| 131 | } |
| 132 | vp->numMappings--; |
| 133 | vp->mappings[vp->numMappings] = NULL; |
| 134 | } |
| 135 | |
| 136 | enum { OPTION_MTRR }; |
| 137 | |
| 138 | static const OptionInfoRec opts[] = { |
| 139 | {OPTION_MTRR, "mtrr", OPTV_BOOLEAN, {0}, FALSE}, |
| 140 | {-1, NULL, OPTV_NONE, {0}, FALSE} |
| 141 | }; |
| 142 | |
| 143 | static void |
| 144 | checkMtrrOption(VidMapPtr vp) |
| 145 | { |
| 146 | if (!vp->mtrrOptChecked && vp->pScrn && vp->pScrn->options != NULL) { |
| 147 | OptionInfoPtr options; |
| 148 | |
| 149 | options = xnfalloc(sizeof(opts)); |
| 150 | (void) memcpy(options, opts, sizeof(opts)); |
| 151 | xf86ProcessOptions(vp->pScrn->scrnIndex, vp->pScrn->options, options); |
| 152 | if (xf86GetOptValBool(options, OPTION_MTRR, &vp->mtrrEnabled)) |
| 153 | vp->mtrrFrom = X_CONFIG; |
| 154 | free(options); |
| 155 | vp->mtrrOptChecked = TRUE; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | void |
| 160 | xf86InitVidMem(void) |
| 161 | { |
| 162 | if (!vidMemInfo.initialised) { |
| 163 | memset(&vidMemInfo, 0, sizeof(VidMemInfo)); |
| 164 | xf86OSInitVidMem(&vidMemInfo); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | pointer |
| 169 | xf86MapVidMem(int ScreenNum, int Flags, unsigned long Base, unsigned long Size) |
| 170 | { |
| 171 | pointer vbase = NULL; |
| 172 | VidMapPtr vp; |
| 173 | MappingPtr mp; |
| 174 | |
| 175 | if (((Flags & VIDMEM_FRAMEBUFFER) && |
| 176 | (Flags & (VIDMEM_MMIO | VIDMEM_MMIO_32BIT)))) |
| 177 | FatalError("Mapping memory with more than one type\n"); |
| 178 | |
| 179 | xf86InitVidMem(); |
| 180 | if (!vidMemInfo.initialised || !vidMemInfo.mapMem) |
| 181 | return NULL; |
| 182 | |
| 183 | vbase = vidMemInfo.mapMem(ScreenNum, Base, Size, Flags); |
| 184 | |
| 185 | if (!vbase || vbase == (pointer) -1) |
| 186 | return NULL; |
| 187 | |
| 188 | vp = getVidMapRec(ScreenNum); |
| 189 | mp = newMapping(vp); |
| 190 | mp->size = Size; |
| 191 | mp->virtBase = vbase; |
| 192 | |
| 193 | /* |
| 194 | * Check the "mtrr" option even when MTRR isn't supported to avoid |
| 195 | * warnings about unrecognised options. |
| 196 | */ |
| 197 | checkMtrrOption(vp); |
| 198 | |
| 199 | if (vp->mtrrEnabled && vidMemInfo.setWC) { |
| 200 | if (Flags & (VIDMEM_MMIO | VIDMEM_MMIO_32BIT)) |
| 201 | mp->mtrrInfo = |
| 202 | vidMemInfo.setWC(ScreenNum, Base, Size, FALSE, vp->mtrrFrom); |
| 203 | else if (Flags & VIDMEM_FRAMEBUFFER) |
| 204 | mp->mtrrInfo = |
| 205 | vidMemInfo.setWC(ScreenNum, Base, Size, TRUE, vp->mtrrFrom); |
| 206 | } |
| 207 | return vbase; |
| 208 | } |
| 209 | |
| 210 | void |
| 211 | xf86UnMapVidMem(int ScreenNum, pointer Base, unsigned long Size) |
| 212 | { |
| 213 | VidMapPtr vp; |
| 214 | MappingPtr mp; |
| 215 | |
| 216 | if (!vidMemInfo.initialised || !vidMemInfo.unmapMem) { |
| 217 | xf86DrvMsg(ScreenNum, X_WARNING, |
| 218 | "xf86UnMapVidMem() called before xf86MapVidMem()\n"); |
| 219 | return; |
| 220 | } |
| 221 | |
| 222 | vp = getVidMapRec(ScreenNum); |
| 223 | mp = findMapping(vp, Base, Size); |
| 224 | if (!mp) { |
| 225 | xf86DrvMsg(ScreenNum, X_WARNING, |
| 226 | "xf86UnMapVidMem: cannot find region for [%p,0x%lx]\n", |
| 227 | Base, Size); |
| 228 | return; |
| 229 | } |
| 230 | if (vp->mtrrEnabled && vidMemInfo.undoWC && mp) |
| 231 | vidMemInfo.undoWC(ScreenNum, mp->mtrrInfo); |
| 232 | |
| 233 | vidMemInfo.unmapMem(ScreenNum, Base, Size); |
| 234 | removeMapping(vp, mp); |
| 235 | } |
| 236 | |
| 237 | Bool |
| 238 | xf86CheckMTRR(int ScreenNum) |
| 239 | { |
| 240 | VidMapPtr vp = getVidMapRec(ScreenNum); |
| 241 | |
| 242 | /* |
| 243 | * Check the "mtrr" option even when MTRR isn't supported to avoid |
| 244 | * warnings about unrecognised options. |
| 245 | */ |
| 246 | checkMtrrOption(vp); |
| 247 | |
| 248 | if (vp->mtrrEnabled && vidMemInfo.setWC) |
| 249 | return TRUE; |
| 250 | |
| 251 | return FALSE; |
| 252 | } |
| 253 | |
| 254 | Bool |
| 255 | xf86LinearVidMem(void) |
| 256 | { |
| 257 | xf86InitVidMem(); |
| 258 | return vidMemInfo.linearSupported; |
| 259 | } |