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sys/dev/pci/pci_user.c
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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: releng/11.2/sys/dev/pci/pci_user.c 331922 2018-04-03 09:40:52Z kib $"); 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 #ifdef COMPAT_FREEBSD32 229 struct pci_conf_old32 { 230 struct pcisel_old pc_sel; /* bus+slot+function */ 231 uint8_t pc_hdr; /* PCI header type */ 232 uint16_t pc_subvendor; /* card vendor ID */ 233 uint16_t pc_subdevice; /* card device ID, assigned by 234 card vendor */ 235 uint16_t pc_vendor; /* chip vendor ID */ 236 uint16_t pc_device; /* chip device ID, assigned by 237 chip vendor */ 238 uint8_t pc_class; /* chip PCI class */ 239 uint8_t pc_subclass; /* chip PCI subclass */ 240 uint8_t pc_progif; /* chip PCI programming interface */ 241 uint8_t pc_revid; /* chip revision ID */ 242 char pd_name[PCI_MAXNAMELEN + 1]; /* device name */ 243 uint32_t pd_unit; /* device unit number (u_long) */ 244 }; 245 246 struct pci_match_conf_old32 { 247 struct pcisel_old pc_sel; /* bus+slot+function */ 248 char pd_name[PCI_MAXNAMELEN + 1]; /* device name */ 249 uint32_t pd_unit; /* Unit number (u_long) */ 250 uint16_t pc_vendor; /* PCI Vendor ID */ 251 uint16_t pc_device; /* PCI Device ID */ 252 uint8_t pc_class; /* PCI class */ 253 pci_getconf_flags_old flags; /* Matching expression */ 254 }; 255 256 struct pci_conf_io32 { 257 uint32_t pat_buf_len; /* pattern buffer length */ 258 uint32_t num_patterns; /* number of patterns */ 259 uint32_t patterns; /* pattern buffer 260 (struct pci_match_conf_old32 *) */ 261 uint32_t match_buf_len; /* match buffer length */ 262 uint32_t num_matches; /* number of matches returned */ 263 uint32_t matches; /* match buffer 264 (struct pci_conf_old32 *) */ 265 uint32_t offset; /* offset into device list */ 266 uint32_t generation; /* device list generation */ 267 pci_getconf_status status; /* request status */ 268 }; 269 270 #define PCIOCGETCONF_OLD32 _IOWR('p', 1, struct pci_conf_io32) 271 #endif /* COMPAT_FREEBSD32 */ 272 273 #define PCIOCGETCONF_OLD _IOWR('p', 1, struct pci_conf_io) 274 #define PCIOCREAD_OLD _IOWR('p', 2, struct pci_io_old) 275 #define PCIOCWRITE_OLD _IOWR('p', 3, struct pci_io_old) 276 277 static int pci_conf_match_old(struct pci_match_conf_old *matches, 278 int num_matches, struct pci_conf *match_buf); 279 280 static int 281 pci_conf_match_old(struct pci_match_conf_old *matches, int num_matches, 282 struct pci_conf *match_buf) 283 { 284 int i; 285 286 if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0)) 287 return(1); 288 289 for (i = 0; i < num_matches; i++) { 290 if (match_buf->pc_sel.pc_domain != 0) 291 continue; 292 293 /* 294 * I'm not sure why someone would do this...but... 295 */ 296 if (matches[i].flags == PCI_GETCONF_NO_MATCH_OLD) 297 continue; 298 299 /* 300 * Look at each of the match flags. If it's set, do the 301 * comparison. If the comparison fails, we don't have a 302 * match, go on to the next item if there is one. 303 */ 304 if (((matches[i].flags & PCI_GETCONF_MATCH_BUS_OLD) != 0) 305 && (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus)) 306 continue; 307 308 if (((matches[i].flags & PCI_GETCONF_MATCH_DEV_OLD) != 0) 309 && (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev)) 310 continue; 311 312 if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC_OLD) != 0) 313 && (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func)) 314 continue; 315 316 if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR_OLD) != 0) 317 && (match_buf->pc_vendor != matches[i].pc_vendor)) 318 continue; 319 320 if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE_OLD) != 0) 321 && (match_buf->pc_device != matches[i].pc_device)) 322 continue; 323 324 if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS_OLD) != 0) 325 && (match_buf->pc_class != matches[i].pc_class)) 326 continue; 327 328 if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT_OLD) != 0) 329 && (match_buf->pd_unit != matches[i].pd_unit)) 330 continue; 331 332 if (((matches[i].flags & PCI_GETCONF_MATCH_NAME_OLD) != 0) 333 && (strncmp(matches[i].pd_name, match_buf->pd_name, 334 sizeof(match_buf->pd_name)) != 0)) 335 continue; 336 337 return(0); 338 } 339 340 return(1); 341 } 342 343 #ifdef COMPAT_FREEBSD32 344 static int 345 pci_conf_match_old32(struct pci_match_conf_old32 *matches, int num_matches, 346 struct pci_conf *match_buf) 347 { 348 int i; 349 350 if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0)) 351 return(1); 352 353 for (i = 0; i < num_matches; i++) { 354 if (match_buf->pc_sel.pc_domain != 0) 355 continue; 356 357 /* 358 * I'm not sure why someone would do this...but... 359 */ 360 if (matches[i].flags == PCI_GETCONF_NO_MATCH_OLD) 361 continue; 362 363 /* 364 * Look at each of the match flags. If it's set, do the 365 * comparison. If the comparison fails, we don't have a 366 * match, go on to the next item if there is one. 367 */ 368 if (((matches[i].flags & PCI_GETCONF_MATCH_BUS_OLD) != 0) && 369 (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus)) 370 continue; 371 372 if (((matches[i].flags & PCI_GETCONF_MATCH_DEV_OLD) != 0) && 373 (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev)) 374 continue; 375 376 if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC_OLD) != 0) && 377 (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func)) 378 continue; 379 380 if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR_OLD) != 0) && 381 (match_buf->pc_vendor != matches[i].pc_vendor)) 382 continue; 383 384 if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE_OLD) != 0) && 385 (match_buf->pc_device != matches[i].pc_device)) 386 continue; 387 388 if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS_OLD) != 0) && 389 (match_buf->pc_class != matches[i].pc_class)) 390 continue; 391 392 if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT_OLD) != 0) && 393 ((u_int32_t)match_buf->pd_unit != matches[i].pd_unit)) 394 continue; 395 396 if (((matches[i].flags & PCI_GETCONF_MATCH_NAME_OLD) != 0) && 397 (strncmp(matches[i].pd_name, match_buf->pd_name, 398 sizeof(match_buf->pd_name)) != 0)) 399 continue; 400 401 return (0); 402 } 403 404 return (1); 405 } 406 #endif /* COMPAT_FREEBSD32 */ 407 #endif /* PRE7_COMPAT */ 408 409 static int 410 pci_list_vpd(device_t dev, struct pci_list_vpd_io *lvio) 411 { 412 struct pci_vpd_element vpd_element, *vpd_user; 413 struct pcicfg_vpd *vpd; 414 size_t len; 415 int error, i; 416 417 vpd = pci_fetch_vpd_list(dev); 418 if (vpd->vpd_reg == 0 || vpd->vpd_ident == NULL) 419 return (ENXIO); 420 421 /* 422 * Calculate the amount of space needed in the data buffer. An 423 * identifier element is always present followed by the read-only 424 * and read-write keywords. 425 */ 426 len = sizeof(struct pci_vpd_element) + strlen(vpd->vpd_ident); 427 for (i = 0; i < vpd->vpd_rocnt; i++) 428 len += sizeof(struct pci_vpd_element) + vpd->vpd_ros[i].len; 429 for (i = 0; i < vpd->vpd_wcnt; i++) 430 len += sizeof(struct pci_vpd_element) + vpd->vpd_w[i].len; 431 432 if (lvio->plvi_len == 0) { 433 lvio->plvi_len = len; 434 return (0); 435 } 436 if (lvio->plvi_len < len) { 437 lvio->plvi_len = len; 438 return (ENOMEM); 439 } 440 441 /* 442 * Copyout the identifier string followed by each keyword and 443 * value. 444 */ 445 vpd_user = lvio->plvi_data; 446 vpd_element.pve_keyword[0] = '\0'; 447 vpd_element.pve_keyword[1] = '\0'; 448 vpd_element.pve_flags = PVE_FLAG_IDENT; 449 vpd_element.pve_datalen = strlen(vpd->vpd_ident); 450 error = copyout(&vpd_element, vpd_user, sizeof(vpd_element)); 451 if (error) 452 return (error); 453 error = copyout(vpd->vpd_ident, vpd_user->pve_data, 454 strlen(vpd->vpd_ident)); 455 if (error) 456 return (error); 457 vpd_user = PVE_NEXT(vpd_user); 458 vpd_element.pve_flags = 0; 459 for (i = 0; i < vpd->vpd_rocnt; i++) { 460 vpd_element.pve_keyword[0] = vpd->vpd_ros[i].keyword[0]; 461 vpd_element.pve_keyword[1] = vpd->vpd_ros[i].keyword[1]; 462 vpd_element.pve_datalen = vpd->vpd_ros[i].len; 463 error = copyout(&vpd_element, vpd_user, sizeof(vpd_element)); 464 if (error) 465 return (error); 466 error = copyout(vpd->vpd_ros[i].value, vpd_user->pve_data, 467 vpd->vpd_ros[i].len); 468 if (error) 469 return (error); 470 vpd_user = PVE_NEXT(vpd_user); 471 } 472 vpd_element.pve_flags = PVE_FLAG_RW; 473 for (i = 0; i < vpd->vpd_wcnt; i++) { 474 vpd_element.pve_keyword[0] = vpd->vpd_w[i].keyword[0]; 475 vpd_element.pve_keyword[1] = vpd->vpd_w[i].keyword[1]; 476 vpd_element.pve_datalen = vpd->vpd_w[i].len; 477 error = copyout(&vpd_element, vpd_user, sizeof(vpd_element)); 478 if (error) 479 return (error); 480 error = copyout(vpd->vpd_w[i].value, vpd_user->pve_data, 481 vpd->vpd_w[i].len); 482 if (error) 483 return (error); 484 vpd_user = PVE_NEXT(vpd_user); 485 } 486 KASSERT((char *)vpd_user - (char *)lvio->plvi_data == len, 487 ("length mismatch")); 488 lvio->plvi_len = len; 489 return (0); 490 } 491 492 static int 493 pci_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 494 { 495 device_t pcidev; 496 void *confdata; 497 const char *name; 498 struct devlist *devlist_head; 499 struct pci_conf_io *cio = NULL; 500 struct pci_devinfo *dinfo; 501 struct pci_io *io; 502 struct pci_bar_io *bio; 503 struct pci_list_vpd_io *lvio; 504 struct pci_match_conf *pattern_buf; 505 struct pci_map *pm; 506 size_t confsz, iolen, pbufsz; 507 int error, ionum, i, num_patterns; 508 #ifdef PRE7_COMPAT 509 #ifdef COMPAT_FREEBSD32 510 struct pci_conf_io32 *cio32 = NULL; 511 struct pci_conf_old32 conf_old32; 512 struct pci_match_conf_old32 *pattern_buf_old32 = NULL; 513 #endif 514 struct pci_conf_old conf_old; 515 struct pci_io iodata; 516 struct pci_io_old *io_old; 517 struct pci_match_conf_old *pattern_buf_old = NULL; 518 519 io_old = NULL; 520 #endif 521 522 if (!(flag & FWRITE)) { 523 switch (cmd) { 524 #ifdef PRE7_COMPAT 525 #ifdef COMPAT_FREEBSD32 526 case PCIOCGETCONF_OLD32: 527 #endif 528 case PCIOCGETCONF_OLD: 529 #endif 530 case PCIOCGETCONF: 531 case PCIOCGETBAR: 532 case PCIOCLISTVPD: 533 break; 534 default: 535 return (EPERM); 536 } 537 } 538 539 switch (cmd) { 540 #ifdef PRE7_COMPAT 541 #ifdef COMPAT_FREEBSD32 542 case PCIOCGETCONF_OLD32: 543 cio32 = (struct pci_conf_io32 *)data; 544 cio = malloc(sizeof(struct pci_conf_io), M_TEMP, M_WAITOK); 545 cio->pat_buf_len = cio32->pat_buf_len; 546 cio->num_patterns = cio32->num_patterns; 547 cio->patterns = (void *)(uintptr_t)cio32->patterns; 548 cio->match_buf_len = cio32->match_buf_len; 549 cio->num_matches = cio32->num_matches; 550 cio->matches = (void *)(uintptr_t)cio32->matches; 551 cio->offset = cio32->offset; 552 cio->generation = cio32->generation; 553 cio->status = cio32->status; 554 cio32->num_matches = 0; 555 break; 556 #endif 557 case PCIOCGETCONF_OLD: 558 #endif 559 case PCIOCGETCONF: 560 cio = (struct pci_conf_io *)data; 561 } 562 563 switch (cmd) { 564 #ifdef PRE7_COMPAT 565 #ifdef COMPAT_FREEBSD32 566 case PCIOCGETCONF_OLD32: 567 #endif 568 case PCIOCGETCONF_OLD: 569 #endif 570 case PCIOCGETCONF: 571 572 pattern_buf = NULL; 573 num_patterns = 0; 574 dinfo = NULL; 575 576 cio->num_matches = 0; 577 578 /* 579 * If the user specified an offset into the device list, 580 * but the list has changed since they last called this 581 * ioctl, tell them that the list has changed. They will 582 * have to get the list from the beginning. 583 */ 584 if ((cio->offset != 0) 585 && (cio->generation != pci_generation)){ 586 cio->status = PCI_GETCONF_LIST_CHANGED; 587 error = 0; 588 goto getconfexit; 589 } 590 591 /* 592 * Check to see whether the user has asked for an offset 593 * past the end of our list. 594 */ 595 if (cio->offset >= pci_numdevs) { 596 cio->status = PCI_GETCONF_LAST_DEVICE; 597 error = 0; 598 goto getconfexit; 599 } 600 601 /* get the head of the device queue */ 602 devlist_head = &pci_devq; 603 604 /* 605 * Determine how much room we have for pci_conf structures. 606 * Round the user's buffer size down to the nearest 607 * multiple of sizeof(struct pci_conf) in case the user 608 * didn't specify a multiple of that size. 609 */ 610 #ifdef PRE7_COMPAT 611 #ifdef COMPAT_FREEBSD32 612 if (cmd == PCIOCGETCONF_OLD32) 613 confsz = sizeof(struct pci_conf_old32); 614 else 615 #endif 616 if (cmd == PCIOCGETCONF_OLD) 617 confsz = sizeof(struct pci_conf_old); 618 else 619 #endif 620 confsz = sizeof(struct pci_conf); 621 iolen = min(cio->match_buf_len - (cio->match_buf_len % confsz), 622 pci_numdevs * confsz); 623 624 /* 625 * Since we know that iolen is a multiple of the size of 626 * the pciconf union, it's okay to do this. 627 */ 628 ionum = iolen / confsz; 629 630 /* 631 * If this test is true, the user wants the pci_conf 632 * structures returned to match the supplied entries. 633 */ 634 if ((cio->num_patterns > 0) && (cio->num_patterns < pci_numdevs) 635 && (cio->pat_buf_len > 0)) { 636 /* 637 * pat_buf_len needs to be: 638 * num_patterns * sizeof(struct pci_match_conf) 639 * While it is certainly possible the user just 640 * allocated a large buffer, but set the number of 641 * matches correctly, it is far more likely that 642 * their kernel doesn't match the userland utility 643 * they're using. It's also possible that the user 644 * forgot to initialize some variables. Yes, this 645 * may be overly picky, but I hazard to guess that 646 * it's far more likely to just catch folks that 647 * updated their kernel but not their userland. 648 */ 649 #ifdef PRE7_COMPAT 650 #ifdef COMPAT_FREEBSD32 651 if (cmd == PCIOCGETCONF_OLD32) 652 pbufsz = sizeof(struct pci_match_conf_old32); 653 else 654 #endif 655 if (cmd == PCIOCGETCONF_OLD) 656 pbufsz = sizeof(struct pci_match_conf_old); 657 else 658 #endif 659 pbufsz = sizeof(struct pci_match_conf); 660 if (cio->num_patterns * pbufsz != cio->pat_buf_len) { 661 /* The user made a mistake, return an error. */ 662 cio->status = PCI_GETCONF_ERROR; 663 error = EINVAL; 664 goto getconfexit; 665 } 666 667 /* 668 * Allocate a buffer to hold the patterns. 669 */ 670 #ifdef PRE7_COMPAT 671 #ifdef COMPAT_FREEBSD32 672 if (cmd == PCIOCGETCONF_OLD32) { 673 pattern_buf_old32 = malloc(cio->pat_buf_len, 674 M_TEMP, M_WAITOK); 675 error = copyin(cio->patterns, 676 pattern_buf_old32, cio->pat_buf_len); 677 } else 678 #endif /* COMPAT_FREEBSD32 */ 679 if (cmd == PCIOCGETCONF_OLD) { 680 pattern_buf_old = malloc(cio->pat_buf_len, 681 M_TEMP, M_WAITOK); 682 error = copyin(cio->patterns, 683 pattern_buf_old, cio->pat_buf_len); 684 } else 685 #endif /* PRE7_COMPAT */ 686 { 687 pattern_buf = malloc(cio->pat_buf_len, M_TEMP, 688 M_WAITOK); 689 error = copyin(cio->patterns, pattern_buf, 690 cio->pat_buf_len); 691 } 692 if (error != 0) { 693 error = EINVAL; 694 goto getconfexit; 695 } 696 num_patterns = cio->num_patterns; 697 } else if ((cio->num_patterns > 0) 698 || (cio->pat_buf_len > 0)) { 699 /* 700 * The user made a mistake, spit out an error. 701 */ 702 cio->status = PCI_GETCONF_ERROR; 703 error = EINVAL; 704 goto getconfexit; 705 } 706 707 /* 708 * Go through the list of devices and copy out the devices 709 * that match the user's criteria. 710 */ 711 for (cio->num_matches = 0, i = 0, 712 dinfo = STAILQ_FIRST(devlist_head); 713 dinfo != NULL; 714 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) { 715 716 if (i < cio->offset) 717 continue; 718 719 /* Populate pd_name and pd_unit */ 720 name = NULL; 721 if (dinfo->cfg.dev) 722 name = device_get_name(dinfo->cfg.dev); 723 if (name) { 724 strncpy(dinfo->conf.pd_name, name, 725 sizeof(dinfo->conf.pd_name)); 726 dinfo->conf.pd_name[PCI_MAXNAMELEN] = 0; 727 dinfo->conf.pd_unit = 728 device_get_unit(dinfo->cfg.dev); 729 } else { 730 dinfo->conf.pd_name[0] = '\0'; 731 dinfo->conf.pd_unit = 0; 732 } 733 734 #ifdef PRE7_COMPAT 735 if ( 736 #ifdef COMPAT_FREEBSD32 737 (cmd == PCIOCGETCONF_OLD32 && 738 (pattern_buf_old32 == NULL || 739 pci_conf_match_old32(pattern_buf_old32, 740 num_patterns, &dinfo->conf) == 0)) || 741 #endif 742 (cmd == PCIOCGETCONF_OLD && 743 (pattern_buf_old == NULL || 744 pci_conf_match_old(pattern_buf_old, num_patterns, 745 &dinfo->conf) == 0)) || 746 (cmd == PCIOCGETCONF && 747 (pattern_buf == NULL || 748 pci_conf_match(pattern_buf, num_patterns, 749 &dinfo->conf) == 0))) { 750 #else 751 if (pattern_buf == NULL || 752 pci_conf_match(pattern_buf, num_patterns, 753 &dinfo->conf) == 0) { 754 #endif 755 /* 756 * If we've filled up the user's buffer, 757 * break out at this point. Since we've 758 * got a match here, we'll pick right back 759 * up at the matching entry. We can also 760 * tell the user that there are more matches 761 * left. 762 */ 763 if (cio->num_matches >= ionum) 764 break; 765 766 #ifdef PRE7_COMPAT 767 #ifdef COMPAT_FREEBSD32 768 if (cmd == PCIOCGETCONF_OLD32) { 769 memset(&conf_old32, 0, 770 sizeof(conf_old32)); 771 conf_old32.pc_sel.pc_bus = 772 dinfo->conf.pc_sel.pc_bus; 773 conf_old32.pc_sel.pc_dev = 774 dinfo->conf.pc_sel.pc_dev; 775 conf_old32.pc_sel.pc_func = 776 dinfo->conf.pc_sel.pc_func; 777 conf_old32.pc_hdr = dinfo->conf.pc_hdr; 778 conf_old32.pc_subvendor = 779 dinfo->conf.pc_subvendor; 780 conf_old32.pc_subdevice = 781 dinfo->conf.pc_subdevice; 782 conf_old32.pc_vendor = 783 dinfo->conf.pc_vendor; 784 conf_old32.pc_device = 785 dinfo->conf.pc_device; 786 conf_old32.pc_class = 787 dinfo->conf.pc_class; 788 conf_old32.pc_subclass = 789 dinfo->conf.pc_subclass; 790 conf_old32.pc_progif = 791 dinfo->conf.pc_progif; 792 conf_old32.pc_revid = 793 dinfo->conf.pc_revid; 794 strncpy(conf_old32.pd_name, 795 dinfo->conf.pd_name, 796 sizeof(conf_old32.pd_name)); 797 conf_old32.pd_name[PCI_MAXNAMELEN] = 0; 798 conf_old32.pd_unit = 799 (uint32_t)dinfo->conf.pd_unit; 800 confdata = &conf_old32; 801 } else 802 #endif /* COMPAT_FREEBSD32 */ 803 if (cmd == PCIOCGETCONF_OLD) { 804 memset(&conf_old, 0, sizeof(conf_old)); 805 conf_old.pc_sel.pc_bus = 806 dinfo->conf.pc_sel.pc_bus; 807 conf_old.pc_sel.pc_dev = 808 dinfo->conf.pc_sel.pc_dev; 809 conf_old.pc_sel.pc_func = 810 dinfo->conf.pc_sel.pc_func; 811 conf_old.pc_hdr = dinfo->conf.pc_hdr; 812 conf_old.pc_subvendor = 813 dinfo->conf.pc_subvendor; 814 conf_old.pc_subdevice = 815 dinfo->conf.pc_subdevice; 816 conf_old.pc_vendor = 817 dinfo->conf.pc_vendor; 818 conf_old.pc_device = 819 dinfo->conf.pc_device; 820 conf_old.pc_class = 821 dinfo->conf.pc_class; 822 conf_old.pc_subclass = 823 dinfo->conf.pc_subclass; 824 conf_old.pc_progif = 825 dinfo->conf.pc_progif; 826 conf_old.pc_revid = 827 dinfo->conf.pc_revid; 828 strncpy(conf_old.pd_name, 829 dinfo->conf.pd_name, 830 sizeof(conf_old.pd_name)); 831 conf_old.pd_name[PCI_MAXNAMELEN] = 0; 832 conf_old.pd_unit = 833 dinfo->conf.pd_unit; 834 confdata = &conf_old; 835 } else 836 #endif /* PRE7_COMPAT */ 837 confdata = &dinfo->conf; 838 error = copyout(confdata, 839 (caddr_t)cio->matches + 840 confsz * cio->num_matches, confsz); 841 if (error) 842 break; 843 cio->num_matches++; 844 } 845 } 846 847 /* 848 * Set the pointer into the list, so if the user is getting 849 * n records at a time, where n < pci_numdevs, 850 */ 851 cio->offset = i; 852 853 /* 854 * Set the generation, the user will need this if they make 855 * another ioctl call with offset != 0. 856 */ 857 cio->generation = pci_generation; 858 859 /* 860 * If this is the last device, inform the user so he won't 861 * bother asking for more devices. If dinfo isn't NULL, we 862 * know that there are more matches in the list because of 863 * the way the traversal is done. 864 */ 865 if (dinfo == NULL) 866 cio->status = PCI_GETCONF_LAST_DEVICE; 867 else 868 cio->status = PCI_GETCONF_MORE_DEVS; 869 870 getconfexit: 871 #ifdef PRE7_COMPAT 872 #ifdef COMPAT_FREEBSD32 873 if (cmd == PCIOCGETCONF_OLD32) { 874 cio32->status = cio->status; 875 cio32->generation = cio->generation; 876 cio32->offset = cio->offset; 877 cio32->num_matches = cio->num_matches; 878 free(cio, M_TEMP); 879 } 880 if (pattern_buf_old32 != NULL) 881 free(pattern_buf_old32, M_TEMP); 882 #endif 883 if (pattern_buf_old != NULL) 884 free(pattern_buf_old, M_TEMP); 885 #endif 886 if (pattern_buf != NULL) 887 free(pattern_buf, M_TEMP); 888 889 break; 890 891 #ifdef PRE7_COMPAT 892 case PCIOCREAD_OLD: 893 case PCIOCWRITE_OLD: 894 io_old = (struct pci_io_old *)data; 895 iodata.pi_sel.pc_domain = 0; 896 iodata.pi_sel.pc_bus = io_old->pi_sel.pc_bus; 897 iodata.pi_sel.pc_dev = io_old->pi_sel.pc_dev; 898 iodata.pi_sel.pc_func = io_old->pi_sel.pc_func; 899 iodata.pi_reg = io_old->pi_reg; 900 iodata.pi_width = io_old->pi_width; 901 iodata.pi_data = io_old->pi_data; 902 data = (caddr_t)&iodata; 903 /* FALLTHROUGH */ 904 #endif 905 case PCIOCREAD: 906 case PCIOCWRITE: 907 io = (struct pci_io *)data; 908 switch(io->pi_width) { 909 case 4: 910 case 2: 911 case 1: 912 /* Make sure register is not negative and aligned. */ 913 if (io->pi_reg < 0 || 914 io->pi_reg & (io->pi_width - 1)) { 915 error = EINVAL; 916 break; 917 } 918 /* 919 * Assume that the user-level bus number is 920 * in fact the physical PCI bus number. 921 * Look up the grandparent, i.e. the bridge device, 922 * so that we can issue configuration space cycles. 923 */ 924 pcidev = pci_find_dbsf(io->pi_sel.pc_domain, 925 io->pi_sel.pc_bus, io->pi_sel.pc_dev, 926 io->pi_sel.pc_func); 927 if (pcidev) { 928 #ifdef PRE7_COMPAT 929 if (cmd == PCIOCWRITE || cmd == PCIOCWRITE_OLD) 930 #else 931 if (cmd == PCIOCWRITE) 932 #endif 933 pci_write_config(pcidev, 934 io->pi_reg, 935 io->pi_data, 936 io->pi_width); 937 #ifdef PRE7_COMPAT 938 else if (cmd == PCIOCREAD_OLD) 939 io_old->pi_data = 940 pci_read_config(pcidev, 941 io->pi_reg, 942 io->pi_width); 943 #endif 944 else 945 io->pi_data = 946 pci_read_config(pcidev, 947 io->pi_reg, 948 io->pi_width); 949 error = 0; 950 } else { 951 #ifdef COMPAT_FREEBSD4 952 if (cmd == PCIOCREAD_OLD) { 953 io_old->pi_data = -1; 954 error = 0; 955 } else 956 #endif 957 error = ENODEV; 958 } 959 break; 960 default: 961 error = EINVAL; 962 break; 963 } 964 break; 965 966 case PCIOCGETBAR: 967 bio = (struct pci_bar_io *)data; 968 969 /* 970 * Assume that the user-level bus number is 971 * in fact the physical PCI bus number. 972 */ 973 pcidev = pci_find_dbsf(bio->pbi_sel.pc_domain, 974 bio->pbi_sel.pc_bus, bio->pbi_sel.pc_dev, 975 bio->pbi_sel.pc_func); 976 if (pcidev == NULL) { 977 error = ENODEV; 978 break; 979 } 980 pm = pci_find_bar(pcidev, bio->pbi_reg); 981 if (pm == NULL) { 982 error = EINVAL; 983 break; 984 } 985 bio->pbi_base = pm->pm_value; 986 bio->pbi_length = (pci_addr_t)1 << pm->pm_size; 987 bio->pbi_enabled = pci_bar_enabled(pcidev, pm); 988 error = 0; 989 break; 990 case PCIOCATTACHED: 991 error = 0; 992 io = (struct pci_io *)data; 993 pcidev = pci_find_dbsf(io->pi_sel.pc_domain, io->pi_sel.pc_bus, 994 io->pi_sel.pc_dev, io->pi_sel.pc_func); 995 if (pcidev != NULL) 996 io->pi_data = device_is_attached(pcidev); 997 else 998 error = ENODEV; 999 break; 1000 case PCIOCLISTVPD: 1001 lvio = (struct pci_list_vpd_io *)data; 1002 1003 /* 1004 * Assume that the user-level bus number is 1005 * in fact the physical PCI bus number. 1006 */ 1007 pcidev = pci_find_dbsf(lvio->plvi_sel.pc_domain, 1008 lvio->plvi_sel.pc_bus, lvio->plvi_sel.pc_dev, 1009 lvio->plvi_sel.pc_func); 1010 if (pcidev == NULL) { 1011 error = ENODEV; 1012 break; 1013 } 1014 error = pci_list_vpd(pcidev, lvio); 1015 break; 1016 default: 1017 error = ENOTTY; 1018 break; 1019 } 1020 1021 return (error); 1022 }
Cache object: caabaf1b3f855daddb4c58903ff26ad8
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