1 /*- 2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_bus.h" /* XXX trim includes */ 31 #include "opt_compat.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 #include <sys/module.h> 37 #include <sys/linker.h> 38 #include <sys/fcntl.h> 39 #include <sys/conf.h> 40 #include <sys/kernel.h> 41 #include <sys/proc.h> 42 #include <sys/queue.h> 43 #include <sys/types.h> 44 45 #include <vm/vm.h> 46 #include <vm/pmap.h> 47 #include <vm/vm_extern.h> 48 49 #include <sys/bus.h> 50 #include <machine/bus.h> 51 #include <sys/rman.h> 52 #include <machine/resource.h> 53 54 #include <sys/pciio.h> 55 #include <dev/pci/pcireg.h> 56 #include <dev/pci/pcivar.h> 57 58 #include "pcib_if.h" 59 #include "pci_if.h" 60 61 /* 62 * This is the user interface to PCI configuration space. 63 */ 64 65 static d_open_t pci_open; 66 static d_close_t pci_close; 67 static int pci_conf_match(struct pci_match_conf *matches, int num_matches, 68 struct pci_conf *match_buf); 69 static d_ioctl_t pci_ioctl; 70 71 struct cdevsw pcicdev = { 72 .d_version = D_VERSION, 73 .d_flags = D_NEEDGIANT, 74 .d_open = pci_open, 75 .d_close = pci_close, 76 .d_ioctl = pci_ioctl, 77 .d_name = "pci", 78 }; 79 80 static int 81 pci_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 82 { 83 int error; 84 85 if (oflags & FWRITE) { 86 error = securelevel_gt(td->td_ucred, 0); 87 if (error) 88 return (error); 89 } 90 91 return (0); 92 } 93 94 static int 95 pci_close(struct cdev *dev, int flag, int devtype, struct thread *td) 96 { 97 return 0; 98 } 99 100 /* 101 * Match a single pci_conf structure against an array of pci_match_conf 102 * structures. The first argument, 'matches', is an array of num_matches 103 * pci_match_conf structures. match_buf is a pointer to the pci_conf 104 * structure that will be compared to every entry in the matches array. 105 * This function returns 1 on failure, 0 on success. 106 */ 107 static int 108 pci_conf_match(struct pci_match_conf *matches, int num_matches, 109 struct pci_conf *match_buf) 110 { 111 int i; 112 113 if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0)) 114 return(1); 115 116 for (i = 0; i < num_matches; i++) { 117 /* 118 * I'm not sure why someone would do this...but... 119 */ 120 if (matches[i].flags == PCI_GETCONF_NO_MATCH) 121 continue; 122 123 /* 124 * Look at each of the match flags. If it's set, do the 125 * comparison. If the comparison fails, we don't have a 126 * match, go on to the next item if there is one. 127 */ 128 if (((matches[i].flags & PCI_GETCONF_MATCH_DOMAIN) != 0) 129 && (match_buf->pc_sel.pc_domain != 130 matches[i].pc_sel.pc_domain)) 131 continue; 132 133 if (((matches[i].flags & PCI_GETCONF_MATCH_BUS) != 0) 134 && (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus)) 135 continue; 136 137 if (((matches[i].flags & PCI_GETCONF_MATCH_DEV) != 0) 138 && (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev)) 139 continue; 140 141 if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC) != 0) 142 && (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func)) 143 continue; 144 145 if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR) != 0) 146 && (match_buf->pc_vendor != matches[i].pc_vendor)) 147 continue; 148 149 if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE) != 0) 150 && (match_buf->pc_device != matches[i].pc_device)) 151 continue; 152 153 if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS) != 0) 154 && (match_buf->pc_class != matches[i].pc_class)) 155 continue; 156 157 if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT) != 0) 158 && (match_buf->pd_unit != matches[i].pd_unit)) 159 continue; 160 161 if (((matches[i].flags & PCI_GETCONF_MATCH_NAME) != 0) 162 && (strncmp(matches[i].pd_name, match_buf->pd_name, 163 sizeof(match_buf->pd_name)) != 0)) 164 continue; 165 166 return(0); 167 } 168 169 return(1); 170 } 171 172 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \ 173 defined(COMPAT_FREEBSD6) 174 #define PRE7_COMPAT 175 176 typedef enum { 177 PCI_GETCONF_NO_MATCH_OLD = 0x00, 178 PCI_GETCONF_MATCH_BUS_OLD = 0x01, 179 PCI_GETCONF_MATCH_DEV_OLD = 0x02, 180 PCI_GETCONF_MATCH_FUNC_OLD = 0x04, 181 PCI_GETCONF_MATCH_NAME_OLD = 0x08, 182 PCI_GETCONF_MATCH_UNIT_OLD = 0x10, 183 PCI_GETCONF_MATCH_VENDOR_OLD = 0x20, 184 PCI_GETCONF_MATCH_DEVICE_OLD = 0x40, 185 PCI_GETCONF_MATCH_CLASS_OLD = 0x80 186 } pci_getconf_flags_old; 187 188 struct pcisel_old { 189 u_int8_t pc_bus; /* bus number */ 190 u_int8_t pc_dev; /* device on this bus */ 191 u_int8_t pc_func; /* function on this device */ 192 }; 193 194 struct pci_conf_old { 195 struct pcisel_old pc_sel; /* bus+slot+function */ 196 u_int8_t pc_hdr; /* PCI header type */ 197 u_int16_t pc_subvendor; /* card vendor ID */ 198 u_int16_t pc_subdevice; /* card device ID, assigned by 199 card vendor */ 200 u_int16_t pc_vendor; /* chip vendor ID */ 201 u_int16_t pc_device; /* chip device ID, assigned by 202 chip vendor */ 203 u_int8_t pc_class; /* chip PCI class */ 204 u_int8_t pc_subclass; /* chip PCI subclass */ 205 u_int8_t pc_progif; /* chip PCI programming interface */ 206 u_int8_t pc_revid; /* chip revision ID */ 207 char pd_name[PCI_MAXNAMELEN + 1]; /* device name */ 208 u_long pd_unit; /* device unit number */ 209 }; 210 211 struct pci_match_conf_old { 212 struct pcisel_old pc_sel; /* bus+slot+function */ 213 char pd_name[PCI_MAXNAMELEN + 1]; /* device name */ 214 u_long pd_unit; /* Unit number */ 215 u_int16_t pc_vendor; /* PCI Vendor ID */ 216 u_int16_t pc_device; /* PCI Device ID */ 217 u_int8_t pc_class; /* PCI class */ 218 pci_getconf_flags_old flags; /* Matching expression */ 219 }; 220 221 struct pci_io_old { 222 struct pcisel_old pi_sel; /* device to operate on */ 223 int pi_reg; /* configuration register to examine */ 224 int pi_width; /* width (in bytes) of read or write */ 225 u_int32_t pi_data; /* data to write or result of read */ 226 }; 227 228 #define PCIOCGETCONF_OLD _IOWR('p', 1, struct pci_conf_io) 229 #define PCIOCREAD_OLD _IOWR('p', 2, struct pci_io_old) 230 #define PCIOCWRITE_OLD _IOWR('p', 3, struct pci_io_old) 231 232 static int pci_conf_match_old(struct pci_match_conf_old *matches, 233 int num_matches, struct pci_conf *match_buf); 234 235 static int 236 pci_conf_match_old(struct pci_match_conf_old *matches, int num_matches, 237 struct pci_conf *match_buf) 238 { 239 int i; 240 241 if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0)) 242 return(1); 243 244 for (i = 0; i < num_matches; i++) { 245 if (match_buf->pc_sel.pc_domain != 0) 246 continue; 247 248 /* 249 * I'm not sure why someone would do this...but... 250 */ 251 if (matches[i].flags == PCI_GETCONF_NO_MATCH_OLD) 252 continue; 253 254 /* 255 * Look at each of the match flags. If it's set, do the 256 * comparison. If the comparison fails, we don't have a 257 * match, go on to the next item if there is one. 258 */ 259 if (((matches[i].flags & PCI_GETCONF_MATCH_BUS_OLD) != 0) 260 && (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus)) 261 continue; 262 263 if (((matches[i].flags & PCI_GETCONF_MATCH_DEV_OLD) != 0) 264 && (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev)) 265 continue; 266 267 if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC_OLD) != 0) 268 && (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func)) 269 continue; 270 271 if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR_OLD) != 0) 272 && (match_buf->pc_vendor != matches[i].pc_vendor)) 273 continue; 274 275 if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE_OLD) != 0) 276 && (match_buf->pc_device != matches[i].pc_device)) 277 continue; 278 279 if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS_OLD) != 0) 280 && (match_buf->pc_class != matches[i].pc_class)) 281 continue; 282 283 if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT_OLD) != 0) 284 && (match_buf->pd_unit != matches[i].pd_unit)) 285 continue; 286 287 if (((matches[i].flags & PCI_GETCONF_MATCH_NAME_OLD) != 0) 288 && (strncmp(matches[i].pd_name, match_buf->pd_name, 289 sizeof(match_buf->pd_name)) != 0)) 290 continue; 291 292 return(0); 293 } 294 295 return(1); 296 } 297 298 #endif 299 300 static int 301 pci_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 302 { 303 device_t pcidev, brdev; 304 void *confdata; 305 const char *name; 306 struct devlist *devlist_head; 307 struct pci_conf_io *cio; 308 struct pci_devinfo *dinfo; 309 struct pci_io *io; 310 struct pci_bar_io *bio; 311 struct pci_match_conf *pattern_buf; 312 struct resource_list_entry *rle; 313 uint32_t value; 314 size_t confsz, iolen, pbufsz; 315 int error, ionum, i, num_patterns; 316 #ifdef PRE7_COMPAT 317 struct pci_conf_old conf_old; 318 struct pci_io iodata; 319 struct pci_io_old *io_old; 320 struct pci_match_conf_old *pattern_buf_old; 321 322 io_old = NULL; 323 pattern_buf_old = NULL; 324 325 if (!(flag & FWRITE) && cmd != PCIOCGETBAR && 326 cmd != PCIOCGETCONF && cmd != PCIOCGETCONF_OLD) 327 return EPERM; 328 #else 329 if (!(flag & FWRITE) && cmd != PCIOCGETBAR && cmd != PCIOCGETCONF) 330 return EPERM; 331 #endif 332 333 switch(cmd) { 334 #ifdef PRE7_COMPAT 335 case PCIOCGETCONF_OLD: 336 /* FALLTHROUGH */ 337 #endif 338 case PCIOCGETCONF: 339 cio = (struct pci_conf_io *)data; 340 341 pattern_buf = NULL; 342 num_patterns = 0; 343 dinfo = NULL; 344 345 cio->num_matches = 0; 346 347 /* 348 * If the user specified an offset into the device list, 349 * but the list has changed since they last called this 350 * ioctl, tell them that the list has changed. They will 351 * have to get the list from the beginning. 352 */ 353 if ((cio->offset != 0) 354 && (cio->generation != pci_generation)){ 355 cio->status = PCI_GETCONF_LIST_CHANGED; 356 error = 0; 357 break; 358 } 359 360 /* 361 * Check to see whether the user has asked for an offset 362 * past the end of our list. 363 */ 364 if (cio->offset >= pci_numdevs) { 365 cio->status = PCI_GETCONF_LAST_DEVICE; 366 error = 0; 367 break; 368 } 369 370 /* get the head of the device queue */ 371 devlist_head = &pci_devq; 372 373 /* 374 * Determine how much room we have for pci_conf structures. 375 * Round the user's buffer size down to the nearest 376 * multiple of sizeof(struct pci_conf) in case the user 377 * didn't specify a multiple of that size. 378 */ 379 #ifdef PRE7_COMPAT 380 if (cmd == PCIOCGETCONF_OLD) 381 confsz = sizeof(struct pci_conf_old); 382 else 383 #endif 384 confsz = sizeof(struct pci_conf); 385 iolen = min(cio->match_buf_len - (cio->match_buf_len % confsz), 386 pci_numdevs * confsz); 387 388 /* 389 * Since we know that iolen is a multiple of the size of 390 * the pciconf union, it's okay to do this. 391 */ 392 ionum = iolen / confsz; 393 394 /* 395 * If this test is true, the user wants the pci_conf 396 * structures returned to match the supplied entries. 397 */ 398 if ((cio->num_patterns > 0) && (cio->num_patterns < pci_numdevs) 399 && (cio->pat_buf_len > 0)) { 400 /* 401 * pat_buf_len needs to be: 402 * num_patterns * sizeof(struct pci_match_conf) 403 * While it is certainly possible the user just 404 * allocated a large buffer, but set the number of 405 * matches correctly, it is far more likely that 406 * their kernel doesn't match the userland utility 407 * they're using. It's also possible that the user 408 * forgot to initialize some variables. Yes, this 409 * may be overly picky, but I hazard to guess that 410 * it's far more likely to just catch folks that 411 * updated their kernel but not their userland. 412 */ 413 #ifdef PRE7_COMPAT 414 if (cmd == PCIOCGETCONF_OLD) 415 pbufsz = sizeof(struct pci_match_conf_old); 416 else 417 #endif 418 pbufsz = sizeof(struct pci_match_conf); 419 if (cio->num_patterns * pbufsz != cio->pat_buf_len) { 420 /* The user made a mistake, return an error. */ 421 cio->status = PCI_GETCONF_ERROR; 422 error = EINVAL; 423 break; 424 } 425 426 /* 427 * Allocate a buffer to hold the patterns. 428 */ 429 #ifdef PRE7_COMPAT 430 if (cmd == PCIOCGETCONF_OLD) { 431 pattern_buf_old = malloc(cio->pat_buf_len, 432 M_TEMP, M_WAITOK); 433 error = copyin(cio->patterns, 434 pattern_buf_old, cio->pat_buf_len); 435 } else 436 #endif 437 { 438 pattern_buf = malloc(cio->pat_buf_len, M_TEMP, 439 M_WAITOK); 440 error = copyin(cio->patterns, pattern_buf, 441 cio->pat_buf_len); 442 } 443 if (error != 0) { 444 error = EINVAL; 445 goto getconfexit; 446 } 447 num_patterns = cio->num_patterns; 448 } else if ((cio->num_patterns > 0) 449 || (cio->pat_buf_len > 0)) { 450 /* 451 * The user made a mistake, spit out an error. 452 */ 453 cio->status = PCI_GETCONF_ERROR; 454 error = EINVAL; 455 break; 456 } 457 458 /* 459 * Go through the list of devices and copy out the devices 460 * that match the user's criteria. 461 */ 462 for (cio->num_matches = 0, error = 0, i = 0, 463 dinfo = STAILQ_FIRST(devlist_head); 464 (dinfo != NULL) && (cio->num_matches < ionum) 465 && (error == 0) && (i < pci_numdevs) && (dinfo != NULL); 466 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) { 467 468 if (i < cio->offset) 469 continue; 470 471 /* Populate pd_name and pd_unit */ 472 name = NULL; 473 if (dinfo->cfg.dev) 474 name = device_get_name(dinfo->cfg.dev); 475 if (name) { 476 strncpy(dinfo->conf.pd_name, name, 477 sizeof(dinfo->conf.pd_name)); 478 dinfo->conf.pd_name[PCI_MAXNAMELEN] = 0; 479 dinfo->conf.pd_unit = 480 device_get_unit(dinfo->cfg.dev); 481 } else { 482 dinfo->conf.pd_name[0] = '\0'; 483 dinfo->conf.pd_unit = 0; 484 } 485 486 #ifdef PRE7_COMPAT 487 if ((cmd == PCIOCGETCONF_OLD && 488 (pattern_buf_old == NULL || 489 pci_conf_match_old(pattern_buf_old, num_patterns, 490 &dinfo->conf) == 0)) || 491 (cmd == PCIOCGETCONF && 492 (pattern_buf == NULL || 493 pci_conf_match(pattern_buf, num_patterns, 494 &dinfo->conf) == 0))) { 495 #else 496 if (pattern_buf == NULL || 497 pci_conf_match(pattern_buf, num_patterns, 498 &dinfo->conf) == 0) { 499 #endif 500 /* 501 * If we've filled up the user's buffer, 502 * break out at this point. Since we've 503 * got a match here, we'll pick right back 504 * up at the matching entry. We can also 505 * tell the user that there are more matches 506 * left. 507 */ 508 if (cio->num_matches >= ionum) 509 break; 510 511 #ifdef PRE7_COMPAT 512 if (cmd == PCIOCGETCONF_OLD) { 513 conf_old.pc_sel.pc_bus = 514 dinfo->conf.pc_sel.pc_bus; 515 conf_old.pc_sel.pc_dev = 516 dinfo->conf.pc_sel.pc_dev; 517 conf_old.pc_sel.pc_func = 518 dinfo->conf.pc_sel.pc_func; 519 conf_old.pc_hdr = dinfo->conf.pc_hdr; 520 conf_old.pc_subvendor = 521 dinfo->conf.pc_subvendor; 522 conf_old.pc_subdevice = 523 dinfo->conf.pc_subdevice; 524 conf_old.pc_vendor = 525 dinfo->conf.pc_vendor; 526 conf_old.pc_device = 527 dinfo->conf.pc_device; 528 conf_old.pc_class = 529 dinfo->conf.pc_class; 530 conf_old.pc_subclass = 531 dinfo->conf.pc_subclass; 532 conf_old.pc_progif = 533 dinfo->conf.pc_progif; 534 conf_old.pc_revid = 535 dinfo->conf.pc_revid; 536 strncpy(conf_old.pd_name, 537 dinfo->conf.pd_name, 538 sizeof(conf_old.pd_name)); 539 conf_old.pd_name[PCI_MAXNAMELEN] = 0; 540 conf_old.pd_unit = 541 dinfo->conf.pd_unit; 542 confdata = &conf_old; 543 } else 544 #endif 545 confdata = &dinfo->conf; 546 /* Only if we can copy it out do we count it. */ 547 if (!(error = copyout(confdata, 548 (caddr_t)cio->matches + 549 confsz * cio->num_matches, confsz))) 550 cio->num_matches++; 551 } 552 } 553 554 /* 555 * Set the pointer into the list, so if the user is getting 556 * n records at a time, where n < pci_numdevs, 557 */ 558 cio->offset = i; 559 560 /* 561 * Set the generation, the user will need this if they make 562 * another ioctl call with offset != 0. 563 */ 564 cio->generation = pci_generation; 565 566 /* 567 * If this is the last device, inform the user so he won't 568 * bother asking for more devices. If dinfo isn't NULL, we 569 * know that there are more matches in the list because of 570 * the way the traversal is done. 571 */ 572 if (dinfo == NULL) 573 cio->status = PCI_GETCONF_LAST_DEVICE; 574 else 575 cio->status = PCI_GETCONF_MORE_DEVS; 576 577 getconfexit: 578 if (pattern_buf != NULL) 579 free(pattern_buf, M_TEMP); 580 #ifdef PRE7_COMPAT 581 if (pattern_buf_old != NULL) 582 free(pattern_buf_old, M_TEMP); 583 #endif 584 585 break; 586 587 #ifdef PRE7_COMPAT 588 case PCIOCREAD_OLD: 589 case PCIOCWRITE_OLD: 590 io_old = (struct pci_io_old *)data; 591 iodata.pi_sel.pc_domain = 0; 592 iodata.pi_sel.pc_bus = io_old->pi_sel.pc_bus; 593 iodata.pi_sel.pc_dev = io_old->pi_sel.pc_dev; 594 iodata.pi_sel.pc_func = io_old->pi_sel.pc_func; 595 iodata.pi_reg = io_old->pi_reg; 596 iodata.pi_width = io_old->pi_width; 597 iodata.pi_data = io_old->pi_data; 598 data = (caddr_t)&iodata; 599 /* FALLTHROUGH */ 600 #endif 601 case PCIOCREAD: 602 case PCIOCWRITE: 603 io = (struct pci_io *)data; 604 switch(io->pi_width) { 605 case 4: 606 case 2: 607 case 1: 608 /* Make sure register is not negative and aligned. */ 609 if (io->pi_reg < 0 || 610 io->pi_reg & (io->pi_width - 1)) { 611 error = EINVAL; 612 break; 613 } 614 /* 615 * Assume that the user-level bus number is 616 * in fact the physical PCI bus number. 617 * Look up the grandparent, i.e. the bridge device, 618 * so that we can issue configuration space cycles. 619 */ 620 pcidev = pci_find_dbsf(io->pi_sel.pc_domain, 621 io->pi_sel.pc_bus, io->pi_sel.pc_dev, 622 io->pi_sel.pc_func); 623 if (pcidev) { 624 brdev = device_get_parent( 625 device_get_parent(pcidev)); 626 627 #ifdef PRE7_COMPAT 628 if (cmd == PCIOCWRITE || cmd == PCIOCWRITE_OLD) 629 #else 630 if (cmd == PCIOCWRITE) 631 #endif 632 PCIB_WRITE_CONFIG(brdev, 633 io->pi_sel.pc_bus, 634 io->pi_sel.pc_dev, 635 io->pi_sel.pc_func, 636 io->pi_reg, 637 io->pi_data, 638 io->pi_width); 639 #ifdef PRE7_COMPAT 640 else if (cmd == PCIOCREAD_OLD) 641 io_old->pi_data = 642 PCIB_READ_CONFIG(brdev, 643 io->pi_sel.pc_bus, 644 io->pi_sel.pc_dev, 645 io->pi_sel.pc_func, 646 io->pi_reg, 647 io->pi_width); 648 #endif 649 else 650 io->pi_data = 651 PCIB_READ_CONFIG(brdev, 652 io->pi_sel.pc_bus, 653 io->pi_sel.pc_dev, 654 io->pi_sel.pc_func, 655 io->pi_reg, 656 io->pi_width); 657 error = 0; 658 } else { 659 #ifdef COMPAT_FREEBSD4 660 if (cmd == PCIOCREAD_OLD) { 661 io_old->pi_data = -1; 662 error = 0; 663 } else 664 #endif 665 error = ENODEV; 666 } 667 break; 668 default: 669 error = EINVAL; 670 break; 671 } 672 break; 673 674 case PCIOCGETBAR: 675 bio = (struct pci_bar_io *)data; 676 677 /* 678 * Assume that the user-level bus number is 679 * in fact the physical PCI bus number. 680 */ 681 pcidev = pci_find_dbsf(bio->pbi_sel.pc_domain, 682 bio->pbi_sel.pc_bus, bio->pbi_sel.pc_dev, 683 bio->pbi_sel.pc_func); 684 if (pcidev == NULL) { 685 error = ENODEV; 686 break; 687 } 688 dinfo = device_get_ivars(pcidev); 689 690 /* 691 * Look for a resource list entry matching the requested BAR. 692 * 693 * XXX: This will not find BARs that are not initialized, but 694 * maybe that is ok? 695 */ 696 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY, 697 bio->pbi_reg); 698 if (rle == NULL) 699 rle = resource_list_find(&dinfo->resources, 700 SYS_RES_IOPORT, bio->pbi_reg); 701 if (rle == NULL || rle->res == NULL) { 702 error = EINVAL; 703 break; 704 } 705 706 /* 707 * Ok, we have a resource for this BAR. Read the lower 708 * 32 bits to get any flags. 709 */ 710 value = pci_read_config(pcidev, bio->pbi_reg, 4); 711 if (PCI_BAR_MEM(value)) { 712 if (rle->type != SYS_RES_MEMORY) { 713 error = EINVAL; 714 break; 715 } 716 value &= ~PCIM_BAR_MEM_BASE; 717 } else { 718 if (rle->type != SYS_RES_IOPORT) { 719 error = EINVAL; 720 break; 721 } 722 value &= ~PCIM_BAR_IO_BASE; 723 } 724 bio->pbi_base = rman_get_start(rle->res) | value; 725 bio->pbi_length = rman_get_size(rle->res); 726 727 /* 728 * Check the command register to determine if this BAR 729 * is enabled. 730 */ 731 value = pci_read_config(pcidev, PCIR_COMMAND, 2); 732 if (rle->type == SYS_RES_MEMORY) 733 bio->pbi_enabled = (value & PCIM_CMD_MEMEN) != 0; 734 else 735 bio->pbi_enabled = (value & PCIM_CMD_PORTEN) != 0; 736 error = 0; 737 break; 738 default: 739 error = ENOTTY; 740 break; 741 } 742 743 return (error); 744 } 745