pci_user.c revision 210597
155714Skris/*- 2280297Sjkim * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 3280297Sjkim * All rights reserved. 4280297Sjkim * 555714Skris * Redistribution and use in source and binary forms, with or without 655714Skris * modification, are permitted provided that the following conditions 7238405Sjkim * are met: 855714Skris * 1. Redistributions of source code must retain the above copyright 955714Skris * notice unmodified, this list of conditions, and the following 1055714Skris * disclaimer. 1155714Skris * 2. Redistributions in binary form must reproduce the above copyright 1255714Skris * notice, this list of conditions and the following disclaimer in the 1355714Skris * documentation and/or other materials provided with the distribution. 14280297Sjkim * 1555714Skris * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1655714Skris * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1755714Skris * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1855714Skris * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 1955714Skris * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2055714Skris * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2155714Skris * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2255714Skris * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2355714Skris * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2455714Skris * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2555714Skris */ 2655714Skris 2755714Skris#include <sys/cdefs.h> 2855714Skris__FBSDID("$FreeBSD: head/sys/dev/pci/pci_user.c 210597 2010-07-29 06:27:41Z neel $"); 2955714Skris 3055714Skris#include "opt_bus.h" /* XXX trim includes */ 3155714Skris#include "opt_compat.h" 3255714Skris 3355714Skris#include <sys/param.h> 3455714Skris#include <sys/systm.h> 3555714Skris#include <sys/malloc.h> 3655714Skris#include <sys/module.h> 3755714Skris#include <sys/linker.h> 3855714Skris#include <sys/fcntl.h> 3955714Skris#include <sys/conf.h> 4055714Skris#include <sys/kernel.h> 4155714Skris#include <sys/proc.h> 4255714Skris#include <sys/queue.h> 4355714Skris#include <sys/types.h> 4455714Skris 4555714Skris#include <vm/vm.h> 4655714Skris#include <vm/pmap.h> 4755714Skris#include <vm/vm_extern.h> 4855714Skris 4955714Skris#include <sys/bus.h> 5055714Skris#include <machine/bus.h> 5155714Skris#include <sys/rman.h> 5255714Skris#include <machine/resource.h> 5355714Skris 5455714Skris#include <sys/pciio.h> 5555714Skris#include <dev/pci/pcireg.h> 5655714Skris#include <dev/pci/pcivar.h> 5755714Skris 5855714Skris#include "pcib_if.h" 5955714Skris#include "pci_if.h" 6055714Skris 6155714Skris/* 6255714Skris * This is the user interface to PCI configuration space. 6355714Skris */ 6455714Skris 65238405Sjkimstatic d_open_t pci_open; 6655714Skrisstatic d_close_t pci_close; 6755714Skrisstatic int pci_conf_match(struct pci_match_conf *matches, int num_matches, 6855714Skris struct pci_conf *match_buf); 69160814Ssimonstatic d_ioctl_t pci_ioctl; 7055714Skris 71280297Sjkimstruct cdevsw pcicdev = { 72280297Sjkim .d_version = D_VERSION, 73280297Sjkim .d_flags = D_NEEDGIANT, 7455714Skris .d_open = pci_open, 75280297Sjkim .d_close = pci_close, 76280297Sjkim .d_ioctl = pci_ioctl, 77238405Sjkim .d_name = "pci", 78280297Sjkim}; 79280297Sjkim 80280297Sjkimstatic int 81280297Sjkimpci_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 8259191Skris{ 83280297Sjkim int error; 84280297Sjkim 85280297Sjkim if (oflags & FWRITE) { 86280297Sjkim error = securelevel_gt(td->td_ucred, 0); 87280297Sjkim if (error) 88280297Sjkim return (error); 89160814Ssimon } 90280297Sjkim 91280297Sjkim return (0); 92280297Sjkim} 93280297Sjkim 94280297Sjkimstatic int 95280297Sjkimpci_close(struct cdev *dev, int flag, int devtype, struct thread *td) 96280297Sjkim{ 97280297Sjkim return 0; 98280297Sjkim} 99160814Ssimon 100280297Sjkim/* 101160814Ssimon * Match a single pci_conf structure against an array of pci_match_conf 102280297Sjkim * structures. The first argument, 'matches', is an array of num_matches 103280297Sjkim * pci_match_conf structures. match_buf is a pointer to the pci_conf 104280297Sjkim * structure that will be compared to every entry in the matches array. 10555714Skris * This function returns 1 on failure, 0 on success. 10655714Skris */ 10759191Skrisstatic int 10859191Skrispci_conf_match(struct pci_match_conf *matches, int num_matches, 109280297Sjkim struct pci_conf *match_buf) 11059191Skris{ 11159191Skris int i; 11255714Skris 11355714Skris if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0)) 11459191Skris return(1); 11555714Skris 116280297Sjkim for (i = 0; i < num_matches; i++) { 11759191Skris /* 118280297Sjkim * I'm not sure why someone would do this...but... 119280297Sjkim */ 120280297Sjkim if (matches[i].flags == PCI_GETCONF_NO_MATCH) 121280297Sjkim continue; 122280297Sjkim 12355714Skris /* 124280297Sjkim * Look at each of the match flags. If it's set, do the 125280297Sjkim * comparison. If the comparison fails, we don't have a 126280297Sjkim * match, go on to the next item if there is one. 127280297Sjkim */ 128280297Sjkim if (((matches[i].flags & PCI_GETCONF_MATCH_DOMAIN) != 0) 129280297Sjkim && (match_buf->pc_sel.pc_domain != 130280297Sjkim matches[i].pc_sel.pc_domain)) 131280297Sjkim continue; 132280297Sjkim 133280297Sjkim if (((matches[i].flags & PCI_GETCONF_MATCH_BUS) != 0) 134280297Sjkim && (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus)) 135280297Sjkim continue; 136280297Sjkim 137280297Sjkim if (((matches[i].flags & PCI_GETCONF_MATCH_DEV) != 0) 138280297Sjkim && (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev)) 139280297Sjkim continue; 140280297Sjkim 141280297Sjkim if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC) != 0) 142280297Sjkim && (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func)) 143280297Sjkim continue; 144280297Sjkim 145280297Sjkim if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR) != 0) 14655714Skris && (match_buf->pc_vendor != matches[i].pc_vendor)) 14755714Skris continue; 14855714Skris 14955714Skris if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE) != 0) 150280297Sjkim && (match_buf->pc_device != matches[i].pc_device)) 15155714Skris continue; 152280297Sjkim 153280297Sjkim if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS) != 0) 154280297Sjkim && (match_buf->pc_class != matches[i].pc_class)) 155280297Sjkim continue; 15655714Skris 157280297Sjkim if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT) != 0) 158280297Sjkim && (match_buf->pd_unit != matches[i].pd_unit)) 159280297Sjkim continue; 160280297Sjkim 161280297Sjkim if (((matches[i].flags & PCI_GETCONF_MATCH_NAME) != 0) 16255714Skris && (strncmp(matches[i].pd_name, match_buf->pd_name, 163280297Sjkim sizeof(match_buf->pd_name)) != 0)) 164280297Sjkim continue; 165280297Sjkim 166280297Sjkim return(0); 16755714Skris } 16855714Skris 169160814Ssimon return(1); 170160814Ssimon} 171160814Ssimon 172160814Ssimon#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \ 173280297Sjkim defined(COMPAT_FREEBSD6) 174160814Ssimon#define PRE7_COMPAT 175160814Ssimon 176280297Sjkimtypedef enum { 177160814Ssimon PCI_GETCONF_NO_MATCH_OLD = 0x00, 178280297Sjkim PCI_GETCONF_MATCH_BUS_OLD = 0x01, 179160814Ssimon PCI_GETCONF_MATCH_DEV_OLD = 0x02, 180160814Ssimon PCI_GETCONF_MATCH_FUNC_OLD = 0x04, 181160814Ssimon PCI_GETCONF_MATCH_NAME_OLD = 0x08, 182280297Sjkim PCI_GETCONF_MATCH_UNIT_OLD = 0x10, 183160814Ssimon PCI_GETCONF_MATCH_VENDOR_OLD = 0x20, 184280297Sjkim PCI_GETCONF_MATCH_DEVICE_OLD = 0x40, 185160814Ssimon PCI_GETCONF_MATCH_CLASS_OLD = 0x80 186160814Ssimon} pci_getconf_flags_old; 187160814Ssimon 188160814Ssimonstruct pcisel_old { 189280297Sjkim u_int8_t pc_bus; /* bus number */ 190160814Ssimon u_int8_t pc_dev; /* device on this bus */ 191160814Ssimon u_int8_t pc_func; /* function on this device */ 192160814Ssimon}; 193160814Ssimon 194280297Sjkimstruct pci_conf_old { 195160814Ssimon struct pcisel_old pc_sel; /* bus+slot+function */ 196160814Ssimon u_int8_t pc_hdr; /* PCI header type */ 197160814Ssimon u_int16_t pc_subvendor; /* card vendor ID */ 198160814Ssimon u_int16_t pc_subdevice; /* card device ID, assigned by 199280297Sjkim card vendor */ 200280297Sjkim u_int16_t pc_vendor; /* chip vendor ID */ 201280297Sjkim u_int16_t pc_device; /* chip device ID, assigned by 202160814Ssimon chip vendor */ 203160814Ssimon u_int8_t pc_class; /* chip PCI class */ 204160814Ssimon u_int8_t pc_subclass; /* chip PCI subclass */ 205280297Sjkim u_int8_t pc_progif; /* chip PCI programming interface */ 206280297Sjkim u_int8_t pc_revid; /* chip revision ID */ 207160814Ssimon char pd_name[PCI_MAXNAMELEN + 1]; /* device name */ 208280297Sjkim u_long pd_unit; /* device unit number */ 209280297Sjkim}; 210280297Sjkim 211160814Ssimonstruct pci_match_conf_old { 212160814Ssimon struct pcisel_old pc_sel; /* bus+slot+function */ 213160814Ssimon char pd_name[PCI_MAXNAMELEN + 1]; /* device name */ 214280297Sjkim u_long pd_unit; /* Unit number */ 215280297Sjkim u_int16_t pc_vendor; /* PCI Vendor ID */ 216160814Ssimon u_int16_t pc_device; /* PCI Device ID */ 217280297Sjkim u_int8_t pc_class; /* PCI class */ 218280297Sjkim pci_getconf_flags_old flags; /* Matching expression */ 219280297Sjkim}; 220160814Ssimon 221160814Ssimonstruct pci_io_old { 222160814Ssimon struct pcisel_old pi_sel; /* device to operate on */ 223280297Sjkim int pi_reg; /* configuration register to examine */ 224280297Sjkim int pi_width; /* width (in bytes) of read or write */ 225160814Ssimon u_int32_t pi_data; /* data to write or result of read */ 226280297Sjkim}; 227280297Sjkim 228280297Sjkim#define PCIOCGETCONF_OLD _IOWR('p', 1, struct pci_conf_io) 229160814Ssimon#define PCIOCREAD_OLD _IOWR('p', 2, struct pci_io_old) 230#define PCIOCWRITE_OLD _IOWR('p', 3, struct pci_io_old) 231 232static int pci_conf_match_old(struct pci_match_conf_old *matches, 233 int num_matches, struct pci_conf *match_buf); 234 235static int 236pci_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 300static int 301pci_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 577getconfexit: 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 case PCIOCATTACHED: 739 error = 0; 740 io = (struct pci_io *)data; 741 pcidev = pci_find_dbsf(io->pi_sel.pc_domain, io->pi_sel.pc_bus, 742 io->pi_sel.pc_dev, io->pi_sel.pc_func); 743 if (pcidev != NULL) 744 io->pi_data = device_is_attached(pcidev); 745 else 746 error = ENODEV; 747 break; 748 default: 749 error = ENOTTY; 750 break; 751 } 752 753 return (error); 754} 755