sys/dev/pci/pci_user.c

   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_list_vpd(device_t dev, struct pci_list_vpd_io *lvio)
 302 {
 303         struct pci_vpd_element vpd_element, *vpd_user;
 304         struct pcicfg_vpd *vpd;
 305         size_t len;
 306         int error, i;
 307
 308         vpd = pci_fetch_vpd_list(dev);
 309         if (vpd->vpd_reg == 0 || vpd->vpd_ident == NULL)
 310                 return (ENXIO);
 311
 312         /*
 313          * Calculate the amount of space needed in the data buffer.  An
 314          * identifier element is always present followed by the read-only
 315          * and read-write keywords.
 316          */
 317         len = sizeof(struct pci_vpd_element) + strlen(vpd->vpd_ident);
 318         for (i = 0; i < vpd->vpd_rocnt; i++)
 319                 len += sizeof(struct pci_vpd_element) + vpd->vpd_ros[i].len;
 320         for (i = 0; i < vpd->vpd_wcnt; i++)
 321                 len += sizeof(struct pci_vpd_element) + vpd->vpd_w[i].len;
 322
 323         if (lvio->plvi_len == 0) {
 324                 lvio->plvi_len = len;
 325                 return (0);
 326         }
 327         if (lvio->plvi_len < len) {
 328                 lvio->plvi_len = len;
 329                 return (ENOMEM);
 330         }
 331
 332         /*
 333          * Copyout the identifier string followed by each keyword and
 334          * value.
 335          */
 336         vpd_user = lvio->plvi_data;
 337         vpd_element.pve_keyword[0] = '\0';
 338         vpd_element.pve_keyword[1] = '\0';
 339         vpd_element.pve_flags = PVE_FLAG_IDENT;
 340         vpd_element.pve_datalen = strlen(vpd->vpd_ident);
 341         error = copyout(&vpd_element, vpd_user, sizeof(vpd_element));
 342         if (error)
 343                 return (error);
 344         error = copyout(vpd->vpd_ident, vpd_user->pve_data,
 345             strlen(vpd->vpd_ident));
 346         if (error)
 347                 return (error);
 348         vpd_user = PVE_NEXT(vpd_user);
 349         vpd_element.pve_flags = 0;
 350         for (i = 0; i < vpd->vpd_rocnt; i++) {
 351                 vpd_element.pve_keyword[0] = vpd->vpd_ros[i].keyword[0];
 352                 vpd_element.pve_keyword[1] = vpd->vpd_ros[i].keyword[1];
 353                 vpd_element.pve_datalen = vpd->vpd_ros[i].len;
 354                 error = copyout(&vpd_element, vpd_user, sizeof(vpd_element));
 355                 if (error)
 356                         return (error);
 357                 error = copyout(vpd->vpd_ros[i].value, vpd_user->pve_data,
 358                     vpd->vpd_ros[i].len);
 359                 if (error)
 360                         return (error);
 361                 vpd_user = PVE_NEXT(vpd_user);
 362         }
 363         vpd_element.pve_flags = PVE_FLAG_RW;
 364         for (i = 0; i < vpd->vpd_wcnt; i++) {
 365                 vpd_element.pve_keyword[0] = vpd->vpd_w[i].keyword[0];
 366                 vpd_element.pve_keyword[1] = vpd->vpd_w[i].keyword[1];
 367                 vpd_element.pve_datalen = vpd->vpd_w[i].len;
 368                 error = copyout(&vpd_element, vpd_user, sizeof(vpd_element));
 369                 if (error)
 370                         return (error);
 371                 error = copyout(vpd->vpd_w[i].value, vpd_user->pve_data,
 372                     vpd->vpd_w[i].len);
 373                 if (error)
 374                         return (error);
 375                 vpd_user = PVE_NEXT(vpd_user);
 376         }
 377         KASSERT((char *)vpd_user - (char *)lvio->plvi_data == len,
 378             ("length mismatch"));
 379         lvio->plvi_len = len;
 380         return (0);
 381 }
 382
 383 static int
 384 pci_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
 385 {
 386         device_t pcidev, brdev;
 387         void *confdata;
 388         const char *name;
 389         struct devlist *devlist_head;
 390         struct pci_conf_io *cio;
 391         struct pci_devinfo *dinfo;
 392         struct pci_io *io;
 393         struct pci_bar_io *bio;
 394         struct pci_list_vpd_io *lvio;
 395         struct pci_match_conf *pattern_buf;
 396         struct pci_map *pm;
 397         size_t confsz, iolen, pbufsz;
 398         int error, ionum, i, num_patterns;
 399 #ifdef PRE7_COMPAT
 400         struct pci_conf_old conf_old;
 401         struct pci_io iodata;
 402         struct pci_io_old *io_old;
 403         struct pci_match_conf_old *pattern_buf_old;
 404
 405         io_old = NULL;
 406         pattern_buf_old = NULL;
 407 #endif
 408
 409         if (!(flag & FWRITE)) {
 410                 switch (cmd) {
 411 #ifdef PRE7_COMPAT
 412                 case PCIOCGETCONF_OLD:
 413 #endif
 414                 case PCIOCGETCONF:
 415                 case PCIOCGETBAR:
 416                 case PCIOCLISTVPD:
 417                         break;
 418                 default:
 419                         return (EPERM);
 420                 }
 421         }
 422
 423         switch (cmd) {
 424 #ifdef PRE7_COMPAT
 425         case PCIOCGETCONF_OLD:
 426                 /* FALLTHROUGH */
 427 #endif
 428         case PCIOCGETCONF:
 429                 cio = (struct pci_conf_io *)data;
 430
 431                 pattern_buf = NULL;
 432                 num_patterns = 0;
 433                 dinfo = NULL;
 434
 435                 cio->num_matches = 0;
 436
 437                 /*
 438                  * If the user specified an offset into the device list,
 439                  * but the list has changed since they last called this
 440                  * ioctl, tell them that the list has changed.  They will
 441                  * have to get the list from the beginning.
 442                  */
 443                 if ((cio->offset != 0)
 444                  && (cio->generation != pci_generation)){
 445                         cio->status = PCI_GETCONF_LIST_CHANGED;
 446                         error = 0;
 447                         break;
 448                 }
 449
 450                 /*
 451                  * Check to see whether the user has asked for an offset
 452                  * past the end of our list.
 453                  */
 454                 if (cio->offset >= pci_numdevs) {
 455                         cio->status = PCI_GETCONF_LAST_DEVICE;
 456                         error = 0;
 457                         break;
 458                 }
 459
 460                 /* get the head of the device queue */
 461                 devlist_head = &pci_devq;
 462
 463                 /*
 464                  * Determine how much room we have for pci_conf structures.
 465                  * Round the user's buffer size down to the nearest
 466                  * multiple of sizeof(struct pci_conf) in case the user
 467                  * didn't specify a multiple of that size.
 468                  */
 469 #ifdef PRE7_COMPAT
 470                 if (cmd == PCIOCGETCONF_OLD)
 471                         confsz = sizeof(struct pci_conf_old);
 472                 else
 473 #endif
 474                         confsz = sizeof(struct pci_conf);
 475                 iolen = min(cio->match_buf_len - (cio->match_buf_len % confsz),
 476                     pci_numdevs * confsz);
 477
 478                 /*
 479                  * Since we know that iolen is a multiple of the size of
 480                  * the pciconf union, it's okay to do this.
 481                  */
 482                 ionum = iolen / confsz;
 483
 484                 /*
 485                  * If this test is true, the user wants the pci_conf
 486                  * structures returned to match the supplied entries.
 487                  */
 488                 if ((cio->num_patterns > 0) && (cio->num_patterns < pci_numdevs)
 489                  && (cio->pat_buf_len > 0)) {
 490                         /*
 491                          * pat_buf_len needs to be:
 492                          * num_patterns * sizeof(struct pci_match_conf)
 493                          * While it is certainly possible the user just
 494                          * allocated a large buffer, but set the number of
 495                          * matches correctly, it is far more likely that
 496                          * their kernel doesn't match the userland utility
 497                          * they're using.  It's also possible that the user
 498                          * forgot to initialize some variables.  Yes, this
 499                          * may be overly picky, but I hazard to guess that
 500                          * it's far more likely to just catch folks that
 501                          * updated their kernel but not their userland.
 502                          */
 503 #ifdef PRE7_COMPAT
 504                         if (cmd == PCIOCGETCONF_OLD)
 505                                 pbufsz = sizeof(struct pci_match_conf_old);
 506                         else
 507 #endif
 508                                 pbufsz = sizeof(struct pci_match_conf);
 509                         if (cio->num_patterns * pbufsz != cio->pat_buf_len) {
 510                                 /* The user made a mistake, return an error. */
 511                                 cio->status = PCI_GETCONF_ERROR;
 512                                 error = EINVAL;
 513                                 break;
 514                         }
 515
 516                         /*
 517                          * Allocate a buffer to hold the patterns.
 518                          */
 519 #ifdef PRE7_COMPAT
 520                         if (cmd == PCIOCGETCONF_OLD) {
 521                                 pattern_buf_old = malloc(cio->pat_buf_len,
 522                                     M_TEMP, M_WAITOK);
 523                                 error = copyin(cio->patterns,
 524                                     pattern_buf_old, cio->pat_buf_len);
 525                         } else
 526 #endif
 527                         {
 528                                 pattern_buf = malloc(cio->pat_buf_len, M_TEMP,
 529                                     M_WAITOK);
 530                                 error = copyin(cio->patterns, pattern_buf,
 531                                     cio->pat_buf_len);
 532                         }
 533                         if (error != 0) {
 534                                 error = EINVAL;
 535                                 goto getconfexit;
 536                         }
 537                         num_patterns = cio->num_patterns;
 538                 } else if ((cio->num_patterns > 0)
 539                         || (cio->pat_buf_len > 0)) {
 540                         /*
 541                          * The user made a mistake, spit out an error.
 542                          */
 543                         cio->status = PCI_GETCONF_ERROR;
 544                         error = EINVAL;
 545                         break;
 546                 }
 547
 548                 /*
 549                  * Go through the list of devices and copy out the devices
 550                  * that match the user's criteria.
 551                  */
 552                 for (cio->num_matches = 0, error = 0, i = 0,
 553                      dinfo = STAILQ_FIRST(devlist_head);
 554                      (dinfo != NULL) && (cio->num_matches < ionum)
 555                      && (error == 0) && (i < pci_numdevs) && (dinfo != NULL);
 556                      dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
 557
 558                         if (i < cio->offset)
 559                                 continue;
 560
 561                         /* Populate pd_name and pd_unit */
 562                         name = NULL;
 563                         if (dinfo->cfg.dev)
 564                                 name = device_get_name(dinfo->cfg.dev);
 565                         if (name) {
 566                                 strncpy(dinfo->conf.pd_name, name,
 567                                         sizeof(dinfo->conf.pd_name));
 568                                 dinfo->conf.pd_name[PCI_MAXNAMELEN] = 0;
 569                                 dinfo->conf.pd_unit =
 570                                         device_get_unit(dinfo->cfg.dev);
 571                         } else {
 572                                 dinfo->conf.pd_name[0] = '\0';
 573                                 dinfo->conf.pd_unit = 0;
 574                         }
 575
 576 #ifdef PRE7_COMPAT
 577                         if ((cmd == PCIOCGETCONF_OLD &&
 578                             (pattern_buf_old == NULL ||
 579                             pci_conf_match_old(pattern_buf_old, num_patterns,
 580                             &dinfo->conf) == 0)) ||
 581                             (cmd == PCIOCGETCONF &&
 582                             (pattern_buf == NULL ||
 583                             pci_conf_match(pattern_buf, num_patterns,
 584                             &dinfo->conf) == 0))) {
 585 #else
 586                         if (pattern_buf == NULL ||
 587                             pci_conf_match(pattern_buf, num_patterns,
 588                             &dinfo->conf) == 0) {
 589 #endif
 590                                 /*
 591                                  * If we've filled up the user's buffer,
 592                                  * break out at this point.  Since we've
 593                                  * got a match here, we'll pick right back
 594                                  * up at the matching entry.  We can also
 595                                  * tell the user that there are more matches
 596                                  * left.
 597                                  */
 598                                 if (cio->num_matches >= ionum)
 599                                         break;
 600
 601 #ifdef PRE7_COMPAT
 602                                 if (cmd == PCIOCGETCONF_OLD) {
 603                                         conf_old.pc_sel.pc_bus =
 604                                             dinfo->conf.pc_sel.pc_bus;
 605                                         conf_old.pc_sel.pc_dev =
 606                                             dinfo->conf.pc_sel.pc_dev;
 607                                         conf_old.pc_sel.pc_func =
 608                                             dinfo->conf.pc_sel.pc_func;
 609                                         conf_old.pc_hdr = dinfo->conf.pc_hdr;
 610                                         conf_old.pc_subvendor =
 611                                             dinfo->conf.pc_subvendor;
 612                                         conf_old.pc_subdevice =
 613                                             dinfo->conf.pc_subdevice;
 614                                         conf_old.pc_vendor =
 615                                             dinfo->conf.pc_vendor;
 616                                         conf_old.pc_device =
 617                                             dinfo->conf.pc_device;
 618                                         conf_old.pc_class =
 619                                             dinfo->conf.pc_class;
 620                                         conf_old.pc_subclass =
 621                                             dinfo->conf.pc_subclass;
 622                                         conf_old.pc_progif =
 623                                             dinfo->conf.pc_progif;
 624                                         conf_old.pc_revid =
 625                                             dinfo->conf.pc_revid;
 626                                         strncpy(conf_old.pd_name,
 627                                             dinfo->conf.pd_name,
 628                                             sizeof(conf_old.pd_name));
 629                                         conf_old.pd_name[PCI_MAXNAMELEN] = 0;
 630                                         conf_old.pd_unit =
 631                                             dinfo->conf.pd_unit;
 632                                         confdata = &conf_old;
 633                                 } else
 634 #endif
 635                                         confdata = &dinfo->conf;
 636                                 /* Only if we can copy it out do we count it. */
 637                                 if (!(error = copyout(confdata,
 638                                     (caddr_t)cio->matches +
 639                                     confsz * cio->num_matches, confsz)))
 640                                         cio->num_matches++;
 641                         }
 642                 }
 643
 644                 /*
 645                  * Set the pointer into the list, so if the user is getting
 646                  * n records at a time, where n < pci_numdevs,
 647                  */
 648                 cio->offset = i;
 649
 650                 /*
 651                  * Set the generation, the user will need this if they make
 652                  * another ioctl call with offset != 0.
 653                  */
 654                 cio->generation = pci_generation;
 655
 656                 /*
 657                  * If this is the last device, inform the user so he won't
 658                  * bother asking for more devices.  If dinfo isn't NULL, we
 659                  * know that there are more matches in the list because of
 660                  * the way the traversal is done.
 661                  */
 662                 if (dinfo == NULL)
 663                         cio->status = PCI_GETCONF_LAST_DEVICE;
 664                 else
 665                         cio->status = PCI_GETCONF_MORE_DEVS;
 666
 667 getconfexit:
 668                 if (pattern_buf != NULL)
 669                         free(pattern_buf, M_TEMP);
 670 #ifdef PRE7_COMPAT
 671                 if (pattern_buf_old != NULL)
 672                         free(pattern_buf_old, M_TEMP);
 673 #endif
 674
 675                 break;
 676
 677 #ifdef PRE7_COMPAT
 678         case PCIOCREAD_OLD:
 679         case PCIOCWRITE_OLD:
 680                 io_old = (struct pci_io_old *)data;
 681                 iodata.pi_sel.pc_domain = 0;
 682                 iodata.pi_sel.pc_bus = io_old->pi_sel.pc_bus;
 683                 iodata.pi_sel.pc_dev = io_old->pi_sel.pc_dev;
 684                 iodata.pi_sel.pc_func = io_old->pi_sel.pc_func;
 685                 iodata.pi_reg = io_old->pi_reg;
 686                 iodata.pi_width = io_old->pi_width;
 687                 iodata.pi_data = io_old->pi_data;
 688                 data = (caddr_t)&iodata;
 689                 /* FALLTHROUGH */
 690 #endif
 691         case PCIOCREAD:
 692         case PCIOCWRITE:
 693                 io = (struct pci_io *)data;
 694                 switch(io->pi_width) {
 695                 case 4:
 696                 case 2:
 697                 case 1:
 698                         /* Make sure register is not negative and aligned. */
 699                         if (io->pi_reg < 0 ||
 700                             io->pi_reg & (io->pi_width - 1)) {
 701                                 error = EINVAL;
 702                                 break;
 703                         }
 704                         /*
 705                          * Assume that the user-level bus number is
 706                          * in fact the physical PCI bus number.
 707                          * Look up the grandparent, i.e. the bridge device,
 708                          * so that we can issue configuration space cycles.
 709                          */
 710                         pcidev = pci_find_dbsf(io->pi_sel.pc_domain,
 711                             io->pi_sel.pc_bus, io->pi_sel.pc_dev,
 712                             io->pi_sel.pc_func);
 713                         if (pcidev) {
 714                                 brdev = device_get_parent(
 715                                     device_get_parent(pcidev));
 716
 717 #ifdef PRE7_COMPAT
 718                                 if (cmd == PCIOCWRITE || cmd == PCIOCWRITE_OLD)
 719 #else
 720                                 if (cmd == PCIOCWRITE)
 721 #endif
 722                                         PCIB_WRITE_CONFIG(brdev,
 723                                                           io->pi_sel.pc_bus,
 724                                                           io->pi_sel.pc_dev,
 725                                                           io->pi_sel.pc_func,
 726                                                           io->pi_reg,
 727                                                           io->pi_data,
 728                                                           io->pi_width);
 729 #ifdef PRE7_COMPAT
 730                                 else if (cmd == PCIOCREAD_OLD)
 731                                         io_old->pi_data =
 732                                                 PCIB_READ_CONFIG(brdev,
 733                                                           io->pi_sel.pc_bus,
 734                                                           io->pi_sel.pc_dev,
 735                                                           io->pi_sel.pc_func,
 736                                                           io->pi_reg,
 737                                                           io->pi_width);
 738 #endif
 739                                 else
 740                                         io->pi_data =
 741                                                 PCIB_READ_CONFIG(brdev,
 742                                                           io->pi_sel.pc_bus,
 743                                                           io->pi_sel.pc_dev,
 744                                                           io->pi_sel.pc_func,
 745                                                           io->pi_reg,
 746                                                           io->pi_width);
 747                                 error = 0;
 748                         } else {
 749 #ifdef COMPAT_FREEBSD4
 750                                 if (cmd == PCIOCREAD_OLD) {
 751                                         io_old->pi_data = -1;
 752                                         error = 0;
 753                                 } else
 754 #endif
 755                                         error = ENODEV;
 756                         }
 757                         break;
 758                 default:
 759                         error = EINVAL;
 760                         break;
 761                 }
 762                 break;
 763
 764         case PCIOCGETBAR:
 765                 bio = (struct pci_bar_io *)data;
 766
 767                 /*
 768                  * Assume that the user-level bus number is
 769                  * in fact the physical PCI bus number.
 770                  */
 771                 pcidev = pci_find_dbsf(bio->pbi_sel.pc_domain,
 772                     bio->pbi_sel.pc_bus, bio->pbi_sel.pc_dev,
 773                     bio->pbi_sel.pc_func);
 774                 if (pcidev == NULL) {
 775                         error = ENODEV;
 776                         break;
 777                 }
 778                 pm = pci_find_bar(pcidev, bio->pbi_reg);
 779                 if (pm == NULL) {
 780                         error = EINVAL;
 781                         break;
 782                 }
 783                 bio->pbi_base = pm->pm_value;
 784                 bio->pbi_length = (pci_addr_t)1 << pm->pm_size;
 785                 bio->pbi_enabled = pci_bar_enabled(pcidev, pm);
 786                 error = 0;
 787                 break;
 788         case PCIOCLISTVPD:
 789                 lvio = (struct pci_list_vpd_io *)data;
 790
 791                 /*
 792                  * Assume that the user-level bus number is
 793                  * in fact the physical PCI bus number.
 794                  */
 795                 pcidev = pci_find_dbsf(lvio->plvi_sel.pc_domain,
 796                     lvio->plvi_sel.pc_bus, lvio->plvi_sel.pc_dev,
 797                     lvio->plvi_sel.pc_func);
 798                 if (pcidev == NULL) {
 799                         error = ENODEV;
 800                         break;
 801                 }
 802                 error = pci_list_vpd(pcidev, lvio);
 803                 break;
 804         default:
 805                 error = ENOTTY;
 806                 break;
 807         }
 808
 809         return (error);
 810 }