| 1 | /* |
| 2 | * Copyright 1992 by Rich Murphey <Rich@Rice.edu> |
| 3 | * Copyright 1993 by David Wexelblat <dwex@goblin.org> |
| 4 | * |
| 5 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 6 | * documentation for any purpose is hereby granted without fee, provided that |
| 7 | * the above copyright notice appear in all copies and that both that |
| 8 | * copyright notice and this permission notice appear in supporting |
| 9 | * documentation, and that the names of Rich Murphey and David Wexelblat |
| 10 | * not be used in advertising or publicity pertaining to distribution of |
| 11 | * the software without specific, written prior permission. Rich Murphey and |
| 12 | * David Wexelblat make no representations about the suitability of this |
| 13 | * software for any purpose. It is provided "as is" without express or |
| 14 | * implied warranty. |
| 15 | * |
| 16 | * RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO |
| 17 | * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 18 | * FITNESS, IN NO EVENT SHALL RICH MURPHEY OR DAVID WEXELBLAT BE LIABLE FOR |
| 19 | * ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER |
| 20 | * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF |
| 21 | * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| 22 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #ifdef HAVE_XORG_CONFIG_H |
| 27 | #include <xorg-config.h> |
| 28 | #endif |
| 29 | |
| 30 | #include <X11/X.h> |
| 31 | #include "xf86.h" |
| 32 | #include "xf86Priv.h" |
| 33 | |
| 34 | #include <errno.h> |
| 35 | #include <sys/mman.h> |
| 36 | |
| 37 | #ifdef HAS_MTRR_SUPPORT |
| 38 | #ifndef __NetBSD__ |
| 39 | #include <sys/types.h> |
| 40 | #include <sys/memrange.h> |
| 41 | #else |
| 42 | #include "memrange.h" |
| 43 | #endif |
| 44 | #define X_MTRR_ID "XFree86" |
| 45 | #endif |
| 46 | |
| 47 | #if defined(HAS_MTRR_BUILTIN) && defined(__NetBSD__) |
| 48 | #include <machine/mtrr.h> |
| 49 | #include <machine/sysarch.h> |
| 50 | #include <sys/queue.h> |
| 51 | #ifdef __x86_64__ |
| 52 | #define i386_set_mtrr x86_64_set_mtrr |
| 53 | #define i386_get_mtrr x86_64_get_mtrr |
| 54 | #define i386_iopl x86_64_iopl |
| 55 | #endif |
| 56 | #endif |
| 57 | |
| 58 | #include "xf86_OSlib.h" |
| 59 | #include "xf86OSpriv.h" |
| 60 | |
| 61 | #if defined(__NetBSD__) && !defined(MAP_FILE) |
| 62 | #define MAP_FLAGS MAP_SHARED |
| 63 | #else |
| 64 | #define MAP_FLAGS (MAP_FILE | MAP_SHARED) |
| 65 | #endif |
| 66 | |
| 67 | #ifdef __OpenBSD__ |
| 68 | #define SYSCTL_MSG "\tCheck that you have set 'machdep.allowaperture=1'\n"\ |
| 69 | "\tin /etc/sysctl.conf and reboot your machine\n" \ |
| 70 | "\trefer to xf86(4) for details" |
| 71 | #define SYSCTL_MSG2 \ |
| 72 | "Check that you have set 'machdep.allowaperture=2'\n" \ |
| 73 | "\tin /etc/sysctl.conf and reboot your machine\n" \ |
| 74 | "\trefer to xf86(4) for details" |
| 75 | #endif |
| 76 | |
| 77 | /***************************************************************************/ |
| 78 | /* Video Memory Mapping section */ |
| 79 | /***************************************************************************/ |
| 80 | |
| 81 | static Bool useDevMem = FALSE; |
| 82 | static int devMemFd = -1; |
| 83 | |
| 84 | #ifdef HAS_APERTURE_DRV |
| 85 | #define DEV_APERTURE "/dev/xf86" |
| 86 | #endif |
| 87 | |
| 88 | static pointer mapVidMem(int, unsigned long, unsigned long, int); |
| 89 | static void unmapVidMem(int, pointer, unsigned long); |
| 90 | |
| 91 | #ifdef HAS_MTRR_SUPPORT |
| 92 | static pointer setWC(int, unsigned long, unsigned long, Bool, MessageType); |
| 93 | static void undoWC(int, pointer); |
| 94 | static Bool cleanMTRR(void); |
| 95 | #endif |
| 96 | #if defined(HAS_MTRR_BUILTIN) && defined(__NetBSD__) |
| 97 | static pointer NetBSDsetWC(int, unsigned long, unsigned long, Bool, |
| 98 | MessageType); |
| 99 | static void NetBSDundoWC(int, pointer); |
| 100 | #endif |
| 101 | |
| 102 | /* |
| 103 | * Check if /dev/mem can be mmap'd. If it can't print a warning when |
| 104 | * "warn" is TRUE. |
| 105 | */ |
| 106 | static void |
| 107 | checkDevMem(Bool warn) |
| 108 | { |
| 109 | static Bool devMemChecked = FALSE; |
| 110 | int fd; |
| 111 | pointer base; |
| 112 | |
| 113 | if (devMemChecked) |
| 114 | return; |
| 115 | devMemChecked = TRUE; |
| 116 | |
| 117 | if ((fd = open(DEV_MEM, O_RDWR)) >= 0) { |
| 118 | /* Try to map a page at the VGA address */ |
| 119 | base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE, |
| 120 | MAP_FLAGS, fd, (off_t) 0xA0000); |
| 121 | |
| 122 | if (base != MAP_FAILED) { |
| 123 | munmap((caddr_t) base, 4096); |
| 124 | devMemFd = fd; |
| 125 | useDevMem = TRUE; |
| 126 | return; |
| 127 | } |
| 128 | else { |
| 129 | /* This should not happen */ |
| 130 | if (warn) { |
| 131 | xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n", |
| 132 | DEV_MEM, strerror(errno)); |
| 133 | } |
| 134 | useDevMem = FALSE; |
| 135 | return; |
| 136 | } |
| 137 | } |
| 138 | #ifndef HAS_APERTURE_DRV |
| 139 | if (warn) { |
| 140 | xf86Msg(X_WARNING, "checkDevMem: failed to open %s (%s)\n", |
| 141 | DEV_MEM, strerror(errno)); |
| 142 | } |
| 143 | useDevMem = FALSE; |
| 144 | return; |
| 145 | #else |
| 146 | /* Failed to open /dev/mem, try the aperture driver */ |
| 147 | if ((fd = open(DEV_APERTURE, O_RDWR)) >= 0) { |
| 148 | /* Try to map a page at the VGA address */ |
| 149 | base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE, |
| 150 | MAP_FLAGS, fd, (off_t) 0xA0000); |
| 151 | |
| 152 | if (base != MAP_FAILED) { |
| 153 | munmap((caddr_t) base, 4096); |
| 154 | devMemFd = fd; |
| 155 | useDevMem = TRUE; |
| 156 | xf86Msg(X_INFO, "checkDevMem: using aperture driver %s\n", |
| 157 | DEV_APERTURE); |
| 158 | return; |
| 159 | } |
| 160 | else { |
| 161 | |
| 162 | if (warn) { |
| 163 | xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n", |
| 164 | DEV_APERTURE, strerror(errno)); |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | else { |
| 169 | if (warn) { |
| 170 | #ifndef __OpenBSD__ |
| 171 | xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n" |
| 172 | "\t(%s)\n", DEV_MEM, DEV_APERTURE, strerror(errno)); |
| 173 | #else /* __OpenBSD__ */ |
| 174 | xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n" |
| 175 | "\t(%s)\n%s", DEV_MEM, DEV_APERTURE, strerror(errno), |
| 176 | SYSCTL_MSG); |
| 177 | #endif /* __OpenBSD__ */ |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | useDevMem = FALSE; |
| 182 | return; |
| 183 | |
| 184 | #endif |
| 185 | } |
| 186 | |
| 187 | void |
| 188 | xf86OSInitVidMem(VidMemInfoPtr pVidMem) |
| 189 | { |
| 190 | checkDevMem(TRUE); |
| 191 | pVidMem->linearSupported = useDevMem; |
| 192 | pVidMem->mapMem = mapVidMem; |
| 193 | pVidMem->unmapMem = unmapVidMem; |
| 194 | |
| 195 | if (useDevMem) |
| 196 | pci_system_init_dev_mem(devMemFd); |
| 197 | |
| 198 | #ifdef HAS_MTRR_SUPPORT |
| 199 | if (useDevMem) { |
| 200 | if (cleanMTRR()) { |
| 201 | pVidMem->setWC = setWC; |
| 202 | pVidMem->undoWC = undoWC; |
| 203 | } |
| 204 | } |
| 205 | #endif |
| 206 | #if defined(HAS_MTRR_BUILTIN) && defined(__NetBSD__) |
| 207 | pVidMem->setWC = NetBSDsetWC; |
| 208 | pVidMem->undoWC = NetBSDundoWC; |
| 209 | #endif |
| 210 | pVidMem->initialised = TRUE; |
| 211 | } |
| 212 | |
| 213 | static pointer |
| 214 | mapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags) |
| 215 | { |
| 216 | pointer base; |
| 217 | |
| 218 | checkDevMem(FALSE); |
| 219 | |
| 220 | if (useDevMem) { |
| 221 | if (devMemFd < 0) { |
| 222 | FatalError("xf86MapVidMem: failed to open %s (%s)", |
| 223 | DEV_MEM, strerror(errno)); |
| 224 | } |
| 225 | base = mmap((caddr_t) 0, Size, |
| 226 | (flags & VIDMEM_READONLY) ? |
| 227 | PROT_READ : (PROT_READ | PROT_WRITE), |
| 228 | MAP_FLAGS, devMemFd, (off_t) Base); |
| 229 | if (base == MAP_FAILED) { |
| 230 | FatalError("%s: could not mmap %s [s=%lx,a=%lx] (%s)", |
| 231 | "xf86MapVidMem", DEV_MEM, Size, Base, strerror(errno)); |
| 232 | } |
| 233 | return base; |
| 234 | } |
| 235 | |
| 236 | /* else, mmap /dev/vga */ |
| 237 | if ((unsigned long) Base < 0xA0000 || (unsigned long) Base >= 0xC0000) { |
| 238 | FatalError("%s: Address 0x%lx outside allowable range", |
| 239 | "xf86MapVidMem", Base); |
| 240 | } |
| 241 | base = mmap(0, Size, |
| 242 | (flags & VIDMEM_READONLY) ? |
| 243 | PROT_READ : (PROT_READ | PROT_WRITE), |
| 244 | MAP_FLAGS, xf86Info.consoleFd, (unsigned long) Base - 0xA0000); |
| 245 | if (base == MAP_FAILED) { |
| 246 | FatalError("xf86MapVidMem: Could not mmap /dev/vga (%s)", |
| 247 | strerror(errno)); |
| 248 | } |
| 249 | return base; |
| 250 | } |
| 251 | |
| 252 | static void |
| 253 | unmapVidMem(int ScreenNum, pointer Base, unsigned long Size) |
| 254 | { |
| 255 | munmap((caddr_t) Base, Size); |
| 256 | } |
| 257 | |
| 258 | /* |
| 259 | * Read BIOS via mmap()ing DEV_MEM |
| 260 | */ |
| 261 | |
| 262 | int |
| 263 | xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf, |
| 264 | int Len) |
| 265 | { |
| 266 | unsigned char *ptr; |
| 267 | int psize; |
| 268 | int mlen; |
| 269 | |
| 270 | checkDevMem(TRUE); |
| 271 | if (devMemFd == -1) { |
| 272 | return -1; |
| 273 | } |
| 274 | |
| 275 | psize = getpagesize(); |
| 276 | Offset += Base & (psize - 1); |
| 277 | Base &= ~(psize - 1); |
| 278 | mlen = (Offset + Len + psize - 1) & ~(psize - 1); |
| 279 | ptr = (unsigned char *) mmap((caddr_t) 0, mlen, PROT_READ, |
| 280 | MAP_SHARED, devMemFd, (off_t) Base); |
| 281 | if ((long) ptr == -1) { |
| 282 | xf86Msg(X_WARNING, |
| 283 | "xf86ReadBIOS: %s mmap[s=%x,a=%lx,o=%lx] failed (%s)\n", |
| 284 | DEV_MEM, Len, Base, Offset, strerror(errno)); |
| 285 | #ifdef __OpenBSD__ |
| 286 | if (Base < 0xa0000) { |
| 287 | xf86Msg(X_WARNING, SYSCTL_MSG2); |
| 288 | } |
| 289 | #endif |
| 290 | return -1; |
| 291 | } |
| 292 | #ifdef DEBUG |
| 293 | ErrorF("xf86ReadBIOS: BIOS at 0x%08x has signature 0x%04x\n", |
| 294 | Base, ptr[0] | (ptr[1] << 8)); |
| 295 | #endif |
| 296 | (void) memcpy(Buf, (void *) (ptr + Offset), Len); |
| 297 | (void) munmap((caddr_t) ptr, mlen); |
| 298 | #ifdef DEBUG |
| 299 | xf86MsgVerb(X_INFO, 3, "xf86ReadBIOS(%x, %x, Buf, %x)" |
| 300 | "-> %02x %02x %02x %02x...\n", |
| 301 | Base, Offset, Len, Buf[0], Buf[1], Buf[2], Buf[3]); |
| 302 | #endif |
| 303 | return Len; |
| 304 | } |
| 305 | |
| 306 | #ifdef USE_I386_IOPL |
| 307 | /***************************************************************************/ |
| 308 | /* I/O Permissions section */ |
| 309 | /***************************************************************************/ |
| 310 | |
| 311 | static Bool ExtendedEnabled = FALSE; |
| 312 | |
| 313 | Bool |
| 314 | xf86EnableIO() |
| 315 | { |
| 316 | if (ExtendedEnabled) |
| 317 | return TRUE; |
| 318 | |
| 319 | if (i386_iopl(TRUE) < 0) { |
| 320 | #ifndef __OpenBSD__ |
| 321 | xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O", |
| 322 | "xf86EnableIO"); |
| 323 | #else |
| 324 | xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O\n%s", |
| 325 | "xf86EnableIO", SYSCTL_MSG); |
| 326 | #endif |
| 327 | return FALSE; |
| 328 | } |
| 329 | ExtendedEnabled = TRUE; |
| 330 | |
| 331 | return TRUE; |
| 332 | } |
| 333 | |
| 334 | void |
| 335 | xf86DisableIO() |
| 336 | { |
| 337 | if (!ExtendedEnabled) |
| 338 | return; |
| 339 | |
| 340 | i386_iopl(FALSE); |
| 341 | ExtendedEnabled = FALSE; |
| 342 | |
| 343 | return; |
| 344 | } |
| 345 | |
| 346 | #endif /* USE_I386_IOPL */ |
| 347 | |
| 348 | #ifdef USE_AMD64_IOPL |
| 349 | /***************************************************************************/ |
| 350 | /* I/O Permissions section */ |
| 351 | /***************************************************************************/ |
| 352 | |
| 353 | static Bool ExtendedEnabled = FALSE; |
| 354 | |
| 355 | Bool |
| 356 | xf86EnableIO() |
| 357 | { |
| 358 | if (ExtendedEnabled) |
| 359 | return TRUE; |
| 360 | |
| 361 | if (amd64_iopl(TRUE) < 0) { |
| 362 | #ifndef __OpenBSD__ |
| 363 | xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O", |
| 364 | "xf86EnableIO"); |
| 365 | #else |
| 366 | xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O\n%s", |
| 367 | "xf86EnableIO", SYSCTL_MSG); |
| 368 | #endif |
| 369 | return FALSE; |
| 370 | } |
| 371 | ExtendedEnabled = TRUE; |
| 372 | |
| 373 | return TRUE; |
| 374 | } |
| 375 | |
| 376 | void |
| 377 | xf86DisableIO() |
| 378 | { |
| 379 | if (!ExtendedEnabled) |
| 380 | return; |
| 381 | |
| 382 | if (amd64_iopl(FALSE) == 0) { |
| 383 | ExtendedEnabled = FALSE; |
| 384 | } |
| 385 | /* Otherwise, the X server has revoqued its root uid, |
| 386 | and thus cannot give up IO privileges any more */ |
| 387 | |
| 388 | return; |
| 389 | } |
| 390 | |
| 391 | #endif /* USE_AMD64_IOPL */ |
| 392 | |
| 393 | #ifdef USE_DEV_IO |
| 394 | static int IoFd = -1; |
| 395 | |
| 396 | Bool |
| 397 | xf86EnableIO() |
| 398 | { |
| 399 | if (IoFd >= 0) |
| 400 | return TRUE; |
| 401 | |
| 402 | if ((IoFd = open("/dev/io", O_RDWR)) == -1) { |
| 403 | xf86Msg(X_WARNING, "xf86EnableIO: " |
| 404 | "Failed to open /dev/io for extended I/O"); |
| 405 | return FALSE; |
| 406 | } |
| 407 | return TRUE; |
| 408 | } |
| 409 | |
| 410 | void |
| 411 | xf86DisableIO() |
| 412 | { |
| 413 | if (IoFd < 0) |
| 414 | return; |
| 415 | |
| 416 | close(IoFd); |
| 417 | IoFd = -1; |
| 418 | return; |
| 419 | } |
| 420 | |
| 421 | #endif |
| 422 | |
| 423 | #ifdef __NetBSD__ |
| 424 | /***************************************************************************/ |
| 425 | /* Set TV output mode */ |
| 426 | /***************************************************************************/ |
| 427 | void |
| 428 | xf86SetTVOut(int mode) |
| 429 | { |
| 430 | switch (xf86Info.consType) { |
| 431 | #ifdef PCCONS_SUPPORT |
| 432 | case PCCONS:{ |
| 433 | |
| 434 | if (ioctl(xf86Info.consoleFd, CONSOLE_X_TV_ON, &mode) < 0) { |
| 435 | xf86Msg(X_WARNING, |
| 436 | "xf86SetTVOut: Could not set console to TV output, %s\n", |
| 437 | strerror(errno)); |
| 438 | } |
| 439 | } |
| 440 | break; |
| 441 | #endif /* PCCONS_SUPPORT */ |
| 442 | |
| 443 | default: |
| 444 | FatalError("Xf86SetTVOut: Unsupported console"); |
| 445 | break; |
| 446 | } |
| 447 | return; |
| 448 | } |
| 449 | |
| 450 | void |
| 451 | xf86SetRGBOut() |
| 452 | { |
| 453 | switch (xf86Info.consType) { |
| 454 | #ifdef PCCONS_SUPPORT |
| 455 | case PCCONS:{ |
| 456 | |
| 457 | if (ioctl(xf86Info.consoleFd, CONSOLE_X_TV_OFF, 0) < 0) { |
| 458 | xf86Msg(X_WARNING, |
| 459 | "xf86SetTVOut: Could not set console to RGB output, %s\n", |
| 460 | strerror(errno)); |
| 461 | } |
| 462 | } |
| 463 | break; |
| 464 | #endif /* PCCONS_SUPPORT */ |
| 465 | |
| 466 | default: |
| 467 | FatalError("Xf86SetTVOut: Unsupported console"); |
| 468 | break; |
| 469 | } |
| 470 | return; |
| 471 | } |
| 472 | #endif |
| 473 | |
| 474 | #ifdef HAS_MTRR_SUPPORT |
| 475 | /* memory range (MTRR) support for FreeBSD */ |
| 476 | |
| 477 | /* |
| 478 | * This code is experimental. Some parts may be overkill, and other parts |
| 479 | * may be incomplete. |
| 480 | */ |
| 481 | |
| 482 | /* |
| 483 | * getAllRanges returns the full list of memory ranges with attributes set. |
| 484 | */ |
| 485 | |
| 486 | static struct mem_range_desc * |
| 487 | getAllRanges(int *nmr) |
| 488 | { |
| 489 | struct mem_range_desc *mrd; |
| 490 | struct mem_range_op mro; |
| 491 | |
| 492 | /* |
| 493 | * Find how many ranges there are. If this fails, then the kernel |
| 494 | * probably doesn't have MTRR support. |
| 495 | */ |
| 496 | mro.mo_arg[0] = 0; |
| 497 | if (ioctl(devMemFd, MEMRANGE_GET, &mro)) |
| 498 | return NULL; |
| 499 | *nmr = mro.mo_arg[0]; |
| 500 | mrd = xnfalloc(*nmr * sizeof(struct mem_range_desc)); |
| 501 | mro.mo_arg[0] = *nmr; |
| 502 | mro.mo_desc = mrd; |
| 503 | if (ioctl(devMemFd, MEMRANGE_GET, &mro)) { |
| 504 | free(mrd); |
| 505 | return NULL; |
| 506 | } |
| 507 | return mrd; |
| 508 | } |
| 509 | |
| 510 | /* |
| 511 | * cleanMTRR removes any memory attribute that may be left by a previous |
| 512 | * X server. Normally there won't be any, but this takes care of the |
| 513 | * case where a server crashed without being able finish cleaning up. |
| 514 | */ |
| 515 | |
| 516 | static Bool |
| 517 | cleanMTRR() |
| 518 | { |
| 519 | struct mem_range_desc *mrd; |
| 520 | struct mem_range_op mro; |
| 521 | int nmr, i; |
| 522 | |
| 523 | /* This shouldn't happen */ |
| 524 | if (devMemFd < 0) |
| 525 | return FALSE; |
| 526 | |
| 527 | if (!(mrd = getAllRanges(&nmr))) |
| 528 | return FALSE; |
| 529 | |
| 530 | for (i = 0; i < nmr; i++) { |
| 531 | if (strcmp(mrd[i].mr_owner, X_MTRR_ID) == 0 && |
| 532 | (mrd[i].mr_flags & MDF_ACTIVE)) { |
| 533 | #ifdef DEBUG |
| 534 | ErrorF("Clean for (0x%lx,0x%lx)\n", |
| 535 | (unsigned long) mrd[i].mr_base, |
| 536 | (unsigned long) mrd[i].mr_len); |
| 537 | #endif |
| 538 | if (mrd[i].mr_flags & MDF_FIXACTIVE) { |
| 539 | mro.mo_arg[0] = MEMRANGE_SET_UPDATE; |
| 540 | mrd[i].mr_flags = MDF_UNCACHEABLE; |
| 541 | } |
| 542 | else { |
| 543 | mro.mo_arg[0] = MEMRANGE_SET_REMOVE; |
| 544 | } |
| 545 | mro.mo_desc = mrd + i; |
| 546 | ioctl(devMemFd, MEMRANGE_SET, &mro); |
| 547 | } |
| 548 | } |
| 549 | #ifdef DEBUG |
| 550 | sleep(10); |
| 551 | #endif |
| 552 | free(mrd); |
| 553 | return TRUE; |
| 554 | } |
| 555 | |
| 556 | typedef struct x_RangeRec { |
| 557 | struct mem_range_desc mrd; |
| 558 | Bool wasWC; |
| 559 | struct x_RangeRec *next; |
| 560 | } RangeRec, *RangePtr; |
| 561 | |
| 562 | static void |
| 563 | freeRangeList(RangePtr range) |
| 564 | { |
| 565 | RangePtr rp; |
| 566 | |
| 567 | while (range) { |
| 568 | rp = range; |
| 569 | range = rp->next; |
| 570 | free(rp); |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | static RangePtr |
| 575 | dupRangeList(RangePtr list) |
| 576 | { |
| 577 | RangePtr new = NULL, rp, p; |
| 578 | |
| 579 | rp = list; |
| 580 | while (rp) { |
| 581 | p = xnfalloc(sizeof(RangeRec)); |
| 582 | *p = *rp; |
| 583 | p->next = new; |
| 584 | new = p; |
| 585 | rp = rp->next; |
| 586 | } |
| 587 | return new; |
| 588 | } |
| 589 | |
| 590 | static RangePtr |
| 591 | sortRangeList(RangePtr list) |
| 592 | { |
| 593 | RangePtr rp1, rp2, copy, sorted = NULL, minp, prev, minprev; |
| 594 | unsigned long minBase; |
| 595 | |
| 596 | /* Sort by base address */ |
| 597 | rp1 = copy = dupRangeList(list); |
| 598 | while (rp1) { |
| 599 | minBase = rp1->mrd.mr_base; |
| 600 | minp = rp1; |
| 601 | minprev = NULL; |
| 602 | prev = rp1; |
| 603 | rp2 = rp1->next; |
| 604 | while (rp2) { |
| 605 | if (rp2->mrd.mr_base < minBase) { |
| 606 | minBase = rp2->mrd.mr_base; |
| 607 | minp = rp2; |
| 608 | minprev = prev; |
| 609 | } |
| 610 | prev = rp2; |
| 611 | rp2 = rp2->next; |
| 612 | } |
| 613 | if (minprev) { |
| 614 | minprev->next = minp->next; |
| 615 | rp1 = copy; |
| 616 | } |
| 617 | else { |
| 618 | rp1 = minp->next; |
| 619 | } |
| 620 | minp->next = sorted; |
| 621 | sorted = minp; |
| 622 | } |
| 623 | return sorted; |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * findRanges returns a list of ranges that overlap the specified range. |
| 628 | */ |
| 629 | |
| 630 | static void |
| 631 | findRanges(unsigned long base, unsigned long size, RangePtr * ucp, |
| 632 | RangePtr * wcp) |
| 633 | { |
| 634 | struct mem_range_desc *mrd; |
| 635 | int nmr, i; |
| 636 | RangePtr rp, *p; |
| 637 | |
| 638 | if (!(mrd = getAllRanges(&nmr))) |
| 639 | return; |
| 640 | |
| 641 | for (i = 0; i < nmr; i++) { |
| 642 | if ((mrd[i].mr_flags & MDF_ACTIVE) && |
| 643 | mrd[i].mr_base < base + size && |
| 644 | mrd[i].mr_base + mrd[i].mr_len > base) { |
| 645 | if (mrd[i].mr_flags & MDF_WRITECOMBINE) |
| 646 | p = wcp; |
| 647 | else if (mrd[i].mr_flags & MDF_UNCACHEABLE) |
| 648 | p = ucp; |
| 649 | else |
| 650 | continue; |
| 651 | rp = xnfalloc(sizeof(RangeRec)); |
| 652 | rp->mrd = mrd[i]; |
| 653 | rp->next = *p; |
| 654 | *p = rp; |
| 655 | } |
| 656 | } |
| 657 | free(mrd); |
| 658 | } |
| 659 | |
| 660 | /* |
| 661 | * This checks if the existing overlapping ranges fully cover the requested |
| 662 | * range. Is this overkill? |
| 663 | */ |
| 664 | |
| 665 | static Bool |
| 666 | fullCoverage(unsigned long base, unsigned long size, RangePtr overlap) |
| 667 | { |
| 668 | RangePtr rp1, sorted = NULL; |
| 669 | unsigned long end; |
| 670 | |
| 671 | sorted = sortRangeList(overlap); |
| 672 | /* Look for gaps */ |
| 673 | rp1 = sorted; |
| 674 | end = base + size; |
| 675 | while (rp1) { |
| 676 | if (rp1->mrd.mr_base > base) { |
| 677 | freeRangeList(sorted); |
| 678 | return FALSE; |
| 679 | } |
| 680 | else { |
| 681 | base = rp1->mrd.mr_base + rp1->mrd.mr_len; |
| 682 | } |
| 683 | if (base >= end) { |
| 684 | freeRangeList(sorted); |
| 685 | return TRUE; |
| 686 | } |
| 687 | rp1 = rp1->next; |
| 688 | } |
| 689 | freeRangeList(sorted); |
| 690 | return FALSE; |
| 691 | } |
| 692 | |
| 693 | static pointer |
| 694 | addWC(int screenNum, unsigned long base, unsigned long size, MessageType from) |
| 695 | { |
| 696 | RangePtr uc = NULL, wc = NULL, retlist = NULL; |
| 697 | struct mem_range_desc mrd; |
| 698 | struct mem_range_op mro; |
| 699 | |
| 700 | findRanges(base, size, &uc, &wc); |
| 701 | |
| 702 | /* See of the full range is already WC */ |
| 703 | if (!uc && fullCoverage(base, size, wc)) { |
| 704 | xf86DrvMsg(screenNum, from, |
| 705 | "Write-combining range (0x%lx,0x%lx) was already set\n", |
| 706 | base, size); |
| 707 | return NULL; |
| 708 | } |
| 709 | |
| 710 | /* Otherwise, try to add the new range */ |
| 711 | mrd.mr_base = base; |
| 712 | mrd.mr_len = size; |
| 713 | strcpy(mrd.mr_owner, X_MTRR_ID); |
| 714 | mrd.mr_flags = MDF_WRITECOMBINE; |
| 715 | mro.mo_desc = &mrd; |
| 716 | mro.mo_arg[0] = MEMRANGE_SET_UPDATE; |
| 717 | if (ioctl(devMemFd, MEMRANGE_SET, &mro)) { |
| 718 | xf86DrvMsg(screenNum, X_WARNING, |
| 719 | "Failed to set write-combining range " |
| 720 | "(0x%lx,0x%lx)\n", base, size); |
| 721 | return NULL; |
| 722 | } |
| 723 | else { |
| 724 | xf86DrvMsg(screenNum, from, |
| 725 | "Write-combining range (0x%lx,0x%lx)\n", base, size); |
| 726 | retlist = xnfalloc(sizeof(RangeRec)); |
| 727 | retlist->mrd = mrd; |
| 728 | retlist->wasWC = FALSE; |
| 729 | retlist->next = NULL; |
| 730 | return retlist; |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | static pointer |
| 735 | delWC(int screenNum, unsigned long base, unsigned long size, MessageType from) |
| 736 | { |
| 737 | RangePtr uc = NULL, wc = NULL, retlist = NULL; |
| 738 | struct mem_range_desc mrd; |
| 739 | struct mem_range_op mro; |
| 740 | |
| 741 | findRanges(base, size, &uc, &wc); |
| 742 | |
| 743 | /* |
| 744 | * See of the full range is already not WC, or if there is full |
| 745 | * coverage from UC ranges. |
| 746 | */ |
| 747 | if (!wc || fullCoverage(base, size, uc)) { |
| 748 | xf86DrvMsg(screenNum, from, |
| 749 | "Write-combining range (0x%lx,0x%lx) was already clear\n", |
| 750 | base, size); |
| 751 | return NULL; |
| 752 | } |
| 753 | |
| 754 | /* Otherwise, try to add the new range */ |
| 755 | mrd.mr_base = base; |
| 756 | mrd.mr_len = size; |
| 757 | strcpy(mrd.mr_owner, X_MTRR_ID); |
| 758 | mrd.mr_flags = MDF_UNCACHEABLE; |
| 759 | mro.mo_desc = &mrd; |
| 760 | mro.mo_arg[0] = MEMRANGE_SET_UPDATE; |
| 761 | if (ioctl(devMemFd, MEMRANGE_SET, &mro)) { |
| 762 | xf86DrvMsg(screenNum, X_WARNING, |
| 763 | "Failed to remove write-combining range " |
| 764 | "(0x%lx,0x%lx)\n", base, size); |
| 765 | /* XXX Should then remove all of the overlapping WC ranges */ |
| 766 | return NULL; |
| 767 | } |
| 768 | else { |
| 769 | xf86DrvMsg(screenNum, from, |
| 770 | "Removed Write-combining range (0x%lx,0x%lx)\n", base, size); |
| 771 | retlist = xnfalloc(sizeof(RangeRec)); |
| 772 | retlist->mrd = mrd; |
| 773 | retlist->wasWC = TRUE; |
| 774 | retlist->next = NULL; |
| 775 | return retlist; |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | static pointer |
| 780 | setWC(int screenNum, unsigned long base, unsigned long size, Bool enable, |
| 781 | MessageType from) |
| 782 | { |
| 783 | if (enable) |
| 784 | return addWC(screenNum, base, size, from); |
| 785 | else |
| 786 | return delWC(screenNum, base, size, from); |
| 787 | } |
| 788 | |
| 789 | static void |
| 790 | undoWC(int screenNum, pointer list) |
| 791 | { |
| 792 | RangePtr rp; |
| 793 | struct mem_range_op mro; |
| 794 | Bool failed; |
| 795 | |
| 796 | rp = list; |
| 797 | while (rp) { |
| 798 | #ifdef DEBUG |
| 799 | ErrorF("Undo for (0x%lx,0x%lx), %d\n", |
| 800 | (unsigned long) rp->mrd.mr_base, |
| 801 | (unsigned long) rp->mrd.mr_len, rp->wasWC); |
| 802 | #endif |
| 803 | failed = FALSE; |
| 804 | if (rp->wasWC) { |
| 805 | mro.mo_arg[0] = MEMRANGE_SET_UPDATE; |
| 806 | rp->mrd.mr_flags = MDF_WRITECOMBINE; |
| 807 | strcpy(rp->mrd.mr_owner, "unknown"); |
| 808 | } |
| 809 | else { |
| 810 | mro.mo_arg[0] = MEMRANGE_SET_REMOVE; |
| 811 | } |
| 812 | mro.mo_desc = &rp->mrd; |
| 813 | |
| 814 | if (ioctl(devMemFd, MEMRANGE_SET, &mro)) { |
| 815 | if (!rp->wasWC) { |
| 816 | mro.mo_arg[0] = MEMRANGE_SET_UPDATE; |
| 817 | rp->mrd.mr_flags = MDF_UNCACHEABLE; |
| 818 | strcpy(rp->mrd.mr_owner, "unknown"); |
| 819 | if (ioctl(devMemFd, MEMRANGE_SET, &mro)) |
| 820 | failed = TRUE; |
| 821 | } |
| 822 | else |
| 823 | failed = TRUE; |
| 824 | } |
| 825 | if (failed) { |
| 826 | xf86DrvMsg(screenNum, X_WARNING, |
| 827 | "Failed to restore MTRR range (0x%lx,0x%lx)\n", |
| 828 | (unsigned long) rp->mrd.mr_base, |
| 829 | (unsigned long) rp->mrd.mr_len); |
| 830 | } |
| 831 | rp = rp->next; |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | #endif /* HAS_MTRR_SUPPORT */ |
| 836 | |
| 837 | #if defined(HAS_MTRR_BUILTIN) && defined(__NetBSD__) |
| 838 | static pointer |
| 839 | NetBSDsetWC(int screenNum, unsigned long base, unsigned long size, Bool enable, |
| 840 | MessageType from) |
| 841 | { |
| 842 | struct mtrr *mtrrp; |
| 843 | int n; |
| 844 | |
| 845 | xf86DrvMsg(screenNum, X_WARNING, |
| 846 | "%s MTRR %lx - %lx\n", enable ? "set" : "remove", |
| 847 | base, (base + size)); |
| 848 | |
| 849 | mtrrp = xnfalloc(sizeof(struct mtrr)); |
| 850 | mtrrp->base = base; |
| 851 | mtrrp->len = size; |
| 852 | mtrrp->type = MTRR_TYPE_WC; |
| 853 | |
| 854 | /* |
| 855 | * MTRR_PRIVATE will make this MTRR get reset automatically |
| 856 | * if this process exits, so we have no need for an explicit |
| 857 | * cleanup operation when starting a new server. |
| 858 | */ |
| 859 | |
| 860 | if (enable) |
| 861 | mtrrp->flags = MTRR_VALID | MTRR_PRIVATE; |
| 862 | else |
| 863 | mtrrp->flags = 0; |
| 864 | n = 1; |
| 865 | |
| 866 | if (i386_set_mtrr(mtrrp, &n) < 0) { |
| 867 | free(mtrrp); |
| 868 | return NULL; |
| 869 | } |
| 870 | return mtrrp; |
| 871 | } |
| 872 | |
| 873 | static void |
| 874 | NetBSDundoWC(int screenNum, pointer list) |
| 875 | { |
| 876 | struct mtrr *mtrrp = (struct mtrr *) list; |
| 877 | int n; |
| 878 | |
| 879 | if (mtrrp == NULL) |
| 880 | return; |
| 881 | n = 1; |
| 882 | mtrrp->flags &= ~MTRR_VALID; |
| 883 | i386_set_mtrr(mtrrp, &n); |
| 884 | free(mtrrp); |
| 885 | } |
| 886 | #endif |