1 /*- 2 * Copyright (c) 1997, Stefan Esser <se@kfreebsd.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 * $FreeBSD: src/sys/dev/pci/pci_user.c,v 1.22.2.4.2.1 2009/04/15 03:14:26 kensmith Exp $ 27 */ 28 29 #include "opt_bus.h" /* XXX trim includes */ 30 #include "opt_compat.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/module.h> 36 #include <sys/linker.h> 37 #include <sys/fcntl.h> 38 #include <sys/conf.h> 39 #include <sys/kernel.h> 40 #include <sys/proc.h> 41 #include <sys/queue.h> 42 #include <sys/types.h> 43 44 #include <vm/vm.h> 45 #include <vm/pmap.h> 46 #include <vm/vm_extern.h> 47 48 #include <sys/bus.h> 49 #include <sys/rman.h> 50 #include <sys/device.h> 51 #include <sys/pciio.h> 52 #include <bus/pci/pcireg.h> 53 #include <bus/pci/pcivar.h> 54 55 #include "pcib_if.h" 56 #include "pci_if.h" 57 58 /* 59 * This is the user interface to PCI configuration space. 60 */ 61 62 #if 0 63 static d_open_t pci_open; 64 static d_close_t pci_close; 65 static int pci_conf_match(struct pci_match_conf *matches, int num_matches, 66 struct pci_conf *match_buf); 67 static d_ioctl_t pci_ioctl; 68 static struct cdevsw pcicdev = { 69 .d_open = pci_open, 70 .d_close = pci_close, 71 .d_ioctl = pci_ioctl, 72 .d_name = "pci", 73 }; 74 #endif 75 76 static int 77 pci_open(struct dev_open_args *ap) 78 { 79 #if 0 80 int error; 81 if (oflags & FWRITE) { 82 error = securelevel_gt(td->td_ucred, 0); 83 if (error) 84 return (error); 85 } 86 #endif 87 return (0); 88 } 89 90 static int 91 pci_close(struct dev_close_args *ap) 92 { 93 return 0; 94 } 95 96 /* 97 * Match a single pci_conf structure against an array of pci_match_conf 98 * structures. The first argument, 'matches', is an array of num_matches 99 * pci_match_conf structures. match_buf is a pointer to the pci_conf 100 * structure that will be compared to every entry in the matches array. 101 * This function returns 1 on failure, 0 on success. 102 */ 103 static int 104 pci_conf_match(struct pci_match_conf *matches, int num_matches, 105 struct pci_conf *match_buf) 106 { 107 int i; 108 109 if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0)) 110 return(1); 111 112 for (i = 0; i < num_matches; i++) { 113 /* 114 * I'm not sure why someone would do this...but... 115 */ 116 if (matches[i].flags == PCI_GETCONF_NO_MATCH) 117 continue; 118 119 /* 120 * Look at each of the match flags. If it's set, do the 121 * comparison. If the comparison fails, we don't have a 122 * match, go on to the next item if there is one. 123 */ 124 if (((matches[i].flags & PCI_GETCONF_MATCH_DOMAIN) != 0) 125 && (match_buf->pc_sel.pc_domain != 126 matches[i].pc_sel.pc_domain)) 127 continue; 128 129 if (((matches[i].flags & PCI_GETCONF_MATCH_BUS) != 0) 130 && (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus)) 131 continue; 132 133 if (((matches[i].flags & PCI_GETCONF_MATCH_DEV) != 0) 134 && (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev)) 135 continue; 136 137 if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC) != 0) 138 && (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func)) 139 continue; 140 141 if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR) != 0) 142 && (match_buf->pc_vendor != matches[i].pc_vendor)) 143 continue; 144 145 if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE) != 0) 146 && (match_buf->pc_device != matches[i].pc_device)) 147 continue; 148 149 if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS) != 0) 150 && (match_buf->pc_class != matches[i].pc_class)) 151 continue; 152 153 if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT) != 0) 154 && (match_buf->pd_unit != matches[i].pd_unit)) 155 continue; 156 157 if (((matches[i].flags & PCI_GETCONF_MATCH_NAME) != 0) 158 && (strncmp(matches[i].pd_name, match_buf->pd_name, 159 sizeof(match_buf->pd_name)) != 0)) 160 continue; 161 162 return(0); 163 } 164 165 return(1); 166 } 167 168 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \ 169 defined(COMPAT_FREEBSD6) || defined(__DragonFly__) 170 #define PRE7_COMPAT 171 172 typedef enum { 173 PCI_GETCONF_NO_MATCH_OLD = 0x00, 174 PCI_GETCONF_MATCH_BUS_OLD = 0x01, 175 PCI_GETCONF_MATCH_DEV_OLD = 0x02, 176 PCI_GETCONF_MATCH_FUNC_OLD = 0x04, 177 PCI_GETCONF_MATCH_NAME_OLD = 0x08, 178 PCI_GETCONF_MATCH_UNIT_OLD = 0x10, 179 PCI_GETCONF_MATCH_VENDOR_OLD = 0x20, 180 PCI_GETCONF_MATCH_DEVICE_OLD = 0x40, 181 PCI_GETCONF_MATCH_CLASS_OLD = 0x80 182 } pci_getconf_flags_old; 183 184 struct pcisel_old { 185 u_int8_t pc_bus; /* bus number */ 186 u_int8_t pc_dev; /* device on this bus */ 187 u_int8_t pc_func; /* function on this device */ 188 }; 189 190 struct pci_conf_old { 191 struct pcisel_old pc_sel; /* bus+slot+function */ 192 u_int8_t pc_hdr; /* PCI header type */ 193 u_int16_t pc_subvendor; /* card vendor ID */ 194 u_int16_t pc_subdevice; /* card device ID, assigned by 195 card vendor */ 196 u_int16_t pc_vendor; /* chip vendor ID */ 197 u_int16_t pc_device; /* chip device ID, assigned by 198 chip vendor */ 199 u_int8_t pc_class; /* chip PCI class */ 200 u_int8_t pc_subclass; /* chip PCI subclass */ 201 u_int8_t pc_progif; /* chip PCI programming interface */ 202 u_int8_t pc_revid; /* chip revision ID */ 203 char pd_name[PCI_MAXNAMELEN + 1]; /* device name */ 204 u_long pd_unit; /* device unit number */ 205 }; 206 207 struct pci_match_conf_old { 208 struct pcisel_old pc_sel; /* bus+slot+function */ 209 char pd_name[PCI_MAXNAMELEN + 1]; /* device name */ 210 u_long pd_unit; /* Unit number */ 211 u_int16_t pc_vendor; /* PCI Vendor ID */ 212 u_int16_t pc_device; /* PCI Device ID */ 213 u_int8_t pc_class; /* PCI class */ 214 pci_getconf_flags_old flags; /* Matching expression */ 215 }; 216 217 struct pci_io_old { 218 struct pcisel_old pi_sel; /* device to operate on */ 219 int pi_reg; /* configuration register to examine */ 220 int pi_width; /* width (in bytes) of read or write */ 221 u_int32_t pi_data; /* data to write or result of read */ 222 }; 223 224 #define PCIOCGETCONF_OLD _IOWR('p', 1, struct pci_conf_io) 225 #define PCIOCREAD_OLD _IOWR('p', 2, struct pci_io_old) 226 #define PCIOCWRITE_OLD _IOWR('p', 3, struct pci_io_old) 227 228 static int pci_conf_match_old(struct pci_match_conf_old *matches, 229 int num_matches, struct pci_conf *match_buf); 230 231 static int 232 pci_conf_match_old(struct pci_match_conf_old *matches, int num_matches, 233 struct pci_conf *match_buf) 234 { 235 int i; 236 237 if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0)) 238 return(1); 239 240 for (i = 0; i < num_matches; i++) { 241 if (match_buf->pc_sel.pc_domain != 0) 242 continue; 243 244 /* 245 * I'm not sure why someone would do this...but... 246 */ 247 if (matches[i].flags == PCI_GETCONF_NO_MATCH_OLD) 248 continue; 249 250 /* 251 * Look at each of the match flags. If it's set, do the 252 * comparison. If the comparison fails, we don't have a 253 * match, go on to the next item if there is one. 254 */ 255 if (((matches[i].flags & PCI_GETCONF_MATCH_BUS_OLD) != 0) 256 && (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus)) 257 continue; 258 259 if (((matches[i].flags & PCI_GETCONF_MATCH_DEV_OLD) != 0) 260 && (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev)) 261 continue; 262 263 if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC_OLD) != 0) 264 && (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func)) 265 continue; 266 267 if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR_OLD) != 0) 268 && (match_buf->pc_vendor != matches[i].pc_vendor)) 269 continue; 270 271 if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE_OLD) != 0) 272 && (match_buf->pc_device != matches[i].pc_device)) 273 continue; 274 275 if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS_OLD) != 0) 276 && (match_buf->pc_class != matches[i].pc_class)) 277 continue; 278 279 if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT_OLD) != 0) 280 && (match_buf->pd_unit != matches[i].pd_unit)) 281 continue; 282 283 if (((matches[i].flags & PCI_GETCONF_MATCH_NAME_OLD) != 0) 284 && (strncmp(matches[i].pd_name, match_buf->pd_name, 285 sizeof(match_buf->pd_name)) != 0)) 286 continue; 287 288 return(0); 289 } 290 291 return(1); 292 } 293 294 #endif 295 296 static int 297 pci_ioctl(struct dev_ioctl_args *ap) 298 { 299 device_t pcidev, brdev; 300 void *confdata; 301 const char *name; 302 struct devlist *devlist_head; 303 struct pci_conf_io *cio; 304 struct pci_devinfo *dinfo; 305 struct pci_io *io; 306 struct pci_bar_io *bio; 307 struct pci_match_conf *pattern_buf; 308 struct resource_list_entry *rle; 309 uint32_t value; 310 size_t confsz, iolen, pbufsz; 311 int error, ionum, i, num_patterns; 312 #ifdef PRE7_COMPAT 313 struct pci_conf_old conf_old; 314 struct pci_io iodata; 315 struct pci_io_old *io_old; 316 struct pci_match_conf_old *pattern_buf_old; 317 318 io_old = NULL; 319 pattern_buf_old = NULL; 320 321 if (!(ap->a_fflag & FWRITE) && ap->a_cmd != PCIOCGETBAR && 322 ap->a_cmd != PCIOCGETCONF && ap->a_cmd != PCIOCGETCONF_OLD) 323 return EPERM; 324 #else 325 if (!(ap->a_fflag & FWRITE) && ap->a_cmd != PCIOCGETBAR && ap->a_cmd != PCIOCGETCONF) 326 return EPERM; 327 #endif 328 329 switch(ap->a_cmd) { 330 #ifdef PRE7_COMPAT 331 case PCIOCGETCONF_OLD: 332 /* FALLTHROUGH */ 333 #endif 334 case PCIOCGETCONF: 335 cio = (struct pci_conf_io *)ap->a_data; 336 337 pattern_buf = NULL; 338 num_patterns = 0; 339 dinfo = NULL; 340 341 cio->num_matches = 0; 342 343 /* 344 * If the user specified an offset into the device list, 345 * but the list has changed since they last called this 346 * ioctl, tell them that the list has changed. They will 347 * have to get the list from the beginning. 348 */ 349 if ((cio->offset != 0) 350 && (cio->generation != pci_generation)){ 351 cio->status = PCI_GETCONF_LIST_CHANGED; 352 error = 0; 353 break; 354 } 355 356 /* 357 * Check to see whether the user has asked for an offset 358 * past the end of our list. 359 */ 360 if (cio->offset >= pci_numdevs) { 361 cio->status = PCI_GETCONF_LAST_DEVICE; 362 error = 0; 363 break; 364 } 365 366 /* get the head of the device queue */ 367 devlist_head = &pci_devq; 368 369 /* 370 * Determine how much room we have for pci_conf structures. 371 * Round the user's buffer size down to the nearest 372 * multiple of sizeof(struct pci_conf) in case the user 373 * didn't specify a multiple of that size. 374 */ 375 #ifdef PRE7_COMPAT 376 if (ap->a_cmd == PCIOCGETCONF_OLD) 377 confsz = sizeof(struct pci_conf_old); 378 else 379 #endif 380 confsz = sizeof(struct pci_conf); 381 iolen = min(cio->match_buf_len - (cio->match_buf_len % confsz), 382 pci_numdevs * confsz); 383 384 /* 385 * Since we know that iolen is a multiple of the size of 386 * the pciconf union, it's okay to do this. 387 */ 388 ionum = iolen / confsz; 389 390 /* 391 * If this test is true, the user wants the pci_conf 392 * structures returned to match the supplied entries. 393 */ 394 if ((cio->num_patterns > 0) && (cio->num_patterns < pci_numdevs) 395 && (cio->pat_buf_len > 0)) { 396 /* 397 * pat_buf_len needs to be: 398 * num_patterns * sizeof(struct pci_match_conf) 399 * While it is certainly possible the user just 400 * allocated a large buffer, but set the number of 401 * matches correctly, it is far more likely that 402 * their kernel doesn't match the userland utility 403 * they're using. It's also possible that the user 404 * forgot to initialize some variables. Yes, this 405 * may be overly picky, but I hazard to guess that 406 * it's far more likely to just catch folks that 407 * updated their kernel but not their userland. 408 */ 409 #ifdef PRE7_COMPAT 410 if (ap->a_cmd == PCIOCGETCONF_OLD) 411 pbufsz = sizeof(struct pci_match_conf_old); 412 else 413 #endif 414 pbufsz = sizeof(struct pci_match_conf); 415 if (cio->num_patterns * pbufsz != cio->pat_buf_len) { 416 /* The user made a mistake, return an error. */ 417 cio->status = PCI_GETCONF_ERROR; 418 error = EINVAL; 419 break; 420 } 421 422 /* 423 * Allocate a buffer to hold the patterns. 424 */ 425 #ifdef PRE7_COMPAT 426 if (ap->a_cmd == PCIOCGETCONF_OLD) { 427 pattern_buf_old = kmalloc(cio->pat_buf_len, 428 M_TEMP, M_WAITOK); 429 error = copyin(cio->patterns, 430 pattern_buf_old, cio->pat_buf_len); 431 } else 432 #endif 433 { 434 pattern_buf = kmalloc(cio->pat_buf_len, M_TEMP, 435 M_WAITOK); 436 error = copyin(cio->patterns, pattern_buf, 437 cio->pat_buf_len); 438 } 439 if (error != 0) { 440 error = EINVAL; 441 goto getconfexit; 442 } 443 num_patterns = cio->num_patterns; 444 } else if ((cio->num_patterns > 0) 445 || (cio->pat_buf_len > 0)) { 446 /* 447 * The user made a mistake, spit out an error. 448 */ 449 cio->status = PCI_GETCONF_ERROR; 450 error = EINVAL; 451 break; 452 } 453 454 /* 455 * Go through the list of devices and copy out the devices 456 * that match the user's criteria. 457 */ 458 for (cio->num_matches = 0, error = 0, i = 0, 459 dinfo = STAILQ_FIRST(devlist_head); 460 (dinfo != NULL) && (cio->num_matches < ionum) 461 && (error == 0) && (i < pci_numdevs) && (dinfo != NULL); 462 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) { 463 464 if (i < cio->offset) 465 continue; 466 467 /* Populate pd_name and pd_unit */ 468 name = NULL; 469 if (dinfo->cfg.dev) 470 name = device_get_name(dinfo->cfg.dev); 471 if (name) { 472 strncpy(dinfo->conf.pd_name, name, 473 sizeof(dinfo->conf.pd_name)); 474 dinfo->conf.pd_name[PCI_MAXNAMELEN] = 0; 475 dinfo->conf.pd_unit = 476 device_get_unit(dinfo->cfg.dev); 477 } else { 478 dinfo->conf.pd_name[0] = '\0'; 479 dinfo->conf.pd_unit = 0; 480 } 481 482 #ifdef PRE7_COMPAT 483 if ((ap->a_cmd == PCIOCGETCONF_OLD && 484 (pattern_buf_old == NULL || 485 pci_conf_match_old(pattern_buf_old, num_patterns, 486 &dinfo->conf) == 0)) || 487 (ap->a_cmd == PCIOCGETCONF && 488 (pattern_buf == NULL || 489 pci_conf_match(pattern_buf, num_patterns, 490 &dinfo->conf) == 0))) { 491 #else 492 if (pattern_buf == NULL || 493 pci_conf_match(pattern_buf, num_patterns, 494 &dinfo->conf) == 0) { 495 #endif 496 /* 497 * If we've filled up the user's buffer, 498 * break out at this point. Since we've 499 * got a match here, we'll pick right back 500 * up at the matching entry. We can also 501 * tell the user that there are more matches 502 * left. 503 */ 504 if (cio->num_matches >= ionum) 505 break; 506 507 #ifdef PRE7_COMPAT 508 if (ap->a_cmd == PCIOCGETCONF_OLD) { 509 conf_old.pc_sel.pc_bus = 510 dinfo->conf.pc_sel.pc_bus; 511 conf_old.pc_sel.pc_dev = 512 dinfo->conf.pc_sel.pc_dev; 513 conf_old.pc_sel.pc_func = 514 dinfo->conf.pc_sel.pc_func; 515 conf_old.pc_hdr = dinfo->conf.pc_hdr; 516 conf_old.pc_subvendor = 517 dinfo->conf.pc_subvendor; 518 conf_old.pc_subdevice = 519 dinfo->conf.pc_subdevice; 520 conf_old.pc_vendor = 521 dinfo->conf.pc_vendor; 522 conf_old.pc_device = 523 dinfo->conf.pc_device; 524 conf_old.pc_class = 525 dinfo->conf.pc_class; 526 conf_old.pc_subclass = 527 dinfo->conf.pc_subclass; 528 conf_old.pc_progif = 529 dinfo->conf.pc_progif; 530 conf_old.pc_revid = 531 dinfo->conf.pc_revid; 532 strncpy(conf_old.pd_name, 533 dinfo->conf.pd_name, 534 sizeof(conf_old.pd_name)); 535 conf_old.pd_name[PCI_MAXNAMELEN] = 0; 536 conf_old.pd_unit = 537 dinfo->conf.pd_unit; 538 confdata = &conf_old; 539 } else 540 #endif 541 confdata = &dinfo->conf; 542 /* Only if we can copy it out do we count it. */ 543 if (!(error = copyout(confdata, 544 (caddr_t)cio->matches + 545 confsz * cio->num_matches, confsz))) 546 cio->num_matches++; 547 } 548 } 549 550 /* 551 * Set the pointer into the list, so if the user is getting 552 * n records at a time, where n < pci_numdevs, 553 */ 554 cio->offset = i; 555 556 /* 557 * Set the generation, the user will need this if they make 558 * another ioctl call with offset != 0. 559 */ 560 cio->generation = pci_generation; 561 562 /* 563 * If this is the last device, inform the user so he won't 564 * bother asking for more devices. If dinfo isn't NULL, we 565 * know that there are more matches in the list because of 566 * the way the traversal is done. 567 */ 568 if (dinfo == NULL) 569 cio->status = PCI_GETCONF_LAST_DEVICE; 570 else 571 cio->status = PCI_GETCONF_MORE_DEVS; 572 573 getconfexit: 574 if (pattern_buf != NULL) 575 kfree(pattern_buf, M_TEMP); 576 #ifdef PRE7_COMPAT 577 if (pattern_buf_old != NULL) 578 kfree(pattern_buf_old, M_TEMP); 579 #endif 580 581 break; 582 583 #ifdef PRE7_COMPAT 584 case PCIOCREAD_OLD: 585 case PCIOCWRITE_OLD: 586 io_old = (struct pci_io_old *)ap->a_data; 587 iodata.pi_sel.pc_domain = 0; 588 iodata.pi_sel.pc_bus = io_old->pi_sel.pc_bus; 589 iodata.pi_sel.pc_dev = io_old->pi_sel.pc_dev; 590 iodata.pi_sel.pc_func = io_old->pi_sel.pc_func; 591 iodata.pi_reg = io_old->pi_reg; 592 iodata.pi_width = io_old->pi_width; 593 iodata.pi_data = io_old->pi_data; 594 ap->a_data = (caddr_t)&iodata; 595 /* FALLTHROUGH */ 596 #endif 597 case PCIOCREAD: 598 case PCIOCWRITE: 599 io = (struct pci_io *)ap->a_data; 600 switch(io->pi_width) { 601 case 4: 602 case 2: 603 case 1: 604 /* Make sure register is in bounds and aligned. */ 605 if (io->pi_reg < 0 || 606 io->pi_reg + io->pi_width > PCI_REGMAX + 1 || 607 io->pi_reg & (io->pi_width - 1)) { 608 error = EINVAL; 609 break; 610 } 611 /* 612 * Assume that the user-level bus number is 613 * in fact the physical PCI bus number. 614 * Look up the grandparent, i.e. the bridge device, 615 * so that we can issue configuration space cycles. 616 */ 617 pcidev = pci_find_dbsf(io->pi_sel.pc_domain, 618 io->pi_sel.pc_bus, io->pi_sel.pc_dev, 619 io->pi_sel.pc_func); 620 if (pcidev) { 621 brdev = device_get_parent( 622 device_get_parent(pcidev)); 623 624 #ifdef PRE7_COMPAT 625 if (ap->a_cmd == PCIOCWRITE || ap->a_cmd == PCIOCWRITE_OLD) 626 #else 627 if (ap->a_cmd == PCIOCWRITE) 628 #endif 629 PCIB_WRITE_CONFIG(brdev, 630 io->pi_sel.pc_bus, 631 io->pi_sel.pc_dev, 632 io->pi_sel.pc_func, 633 io->pi_reg, 634 io->pi_data, 635 io->pi_width); 636 #ifdef PRE7_COMPAT 637 else if (ap->a_cmd == PCIOCREAD_OLD) 638 io_old->pi_data = 639 PCIB_READ_CONFIG(brdev, 640 io->pi_sel.pc_bus, 641 io->pi_sel.pc_dev, 642 io->pi_sel.pc_func, 643 io->pi_reg, 644 io->pi_width); 645 #endif 646 else 647 io->pi_data = 648 PCIB_READ_CONFIG(brdev, 649 io->pi_sel.pc_bus, 650 io->pi_sel.pc_dev, 651 io->pi_sel.pc_func, 652 io->pi_reg, 653 io->pi_width); 654 error = 0; 655 } else { 656 #ifdef COMPAT_FREEBSD4 657 if (cmd == PCIOCREAD_OLD) { 658 io_old->pi_data = -1; 659 error = 0; 660 } else 661 #endif 662 error = ENODEV; 663 } 664 break; 665 default: 666 error = EINVAL; 667 break; 668 } 669 break; 670 671 case PCIOCGETBAR: 672 bio = (struct pci_bar_io *)ap->a_data; 673 674 /* 675 * Assume that the user-level bus number is 676 * in fact the physical PCI bus number. 677 */ 678 pcidev = pci_find_dbsf(bio->pbi_sel.pc_domain, 679 bio->pbi_sel.pc_bus, bio->pbi_sel.pc_dev, 680 bio->pbi_sel.pc_func); 681 if (pcidev == NULL) { 682 error = ENODEV; 683 break; 684 } 685 dinfo = device_get_ivars(pcidev); 686 687 /* 688 * Look for a resource list entry matching the requested BAR. 689 * 690 * XXX: This will not find BARs that are not initialized, but 691 * maybe that is ok? 692 */ 693 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY, 694 bio->pbi_reg); 695 if (rle == NULL) 696 rle = resource_list_find(&dinfo->resources, 697 SYS_RES_IOPORT, bio->pbi_reg); 698 if (rle == NULL || rle->res == NULL) { 699 error = EINVAL; 700 break; 701 } 702 703 /* 704 * Ok, we have a resource for this BAR. Read the lower 705 * 32 bits to get any flags. 706 */ 707 value = pci_read_config(pcidev, bio->pbi_reg, 4); 708 if (PCI_BAR_MEM(value)) { 709 if (rle->type != SYS_RES_MEMORY) { 710 error = EINVAL; 711 break; 712 } 713 value &= ~PCIM_BAR_MEM_BASE; 714 } else { 715 if (rle->type != SYS_RES_IOPORT) { 716 error = EINVAL; 717 break; 718 } 719 value &= ~PCIM_BAR_IO_BASE; 720 } 721 bio->pbi_base = rman_get_start(rle->res) | value; 722 bio->pbi_length = rman_get_size(rle->res); 723 724 /* 725 * Check the command register to determine if this BAR 726 * is enabled. 727 */ 728 value = pci_read_config(pcidev, PCIR_COMMAND, 2); 729 if (rle->type == SYS_RES_MEMORY) 730 bio->pbi_enabled = (value & PCIM_CMD_MEMEN) != 0; 731 else 732 bio->pbi_enabled = (value & PCIM_CMD_PORTEN) != 0; 733 error = 0; 734 break; 735 default: 736 error = ENOTTY; 737 break; 738 } 739 740 return (error); 741 } 742 743 744 #define PCI_CDEV 78 745 struct dev_ops pcic_ops = { 746 { "pci", PCI_CDEV, 0 }, 747 .d_open = pci_open, 748 .d_close = pci_close, 749 .d_ioctl = pci_ioctl, 750 }; 751