sys/bus/pci/pci_user.c

   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 };