drivers/ide/ide-proc.c

   1 /*
   2  *  linux/drivers/ide/ide-proc.c        Version 1.05    Mar 05, 2003
   3  *
   4  *  Copyright (C) 1997-1998     Mark Lord
   5  *  Copyright (C) 2003          Red Hat <alan@redhat.com>
   6  */
   7
   8 /*
   9  * This is the /proc/ide/ filesystem implementation.
  10  *
  11  * The major reason this exists is to provide sufficient access
  12  * to driver and config data, such that user-mode programs can
  13  * be developed to handle chipset tuning for most PCI interfaces.
  14  * This should provide better utilities, and less kernel bloat.
  15  *
  16  * The entire pci config space for a PCI interface chipset can be
  17  * retrieved by just reading it.  e.g.    "cat /proc/ide3/config"
  18  *
  19  * To modify registers *safely*, do something like:
  20  *   echo "P40:88" >/proc/ide/ide3/config
  21  * That expression writes 0x88 to pci config register 0x40
  22  * on the chip which controls ide3.  Multiple tuples can be issued,
  23  * and the writes will be completed as an atomic set:
  24  *   echo "P40:88 P41:35 P42:00 P43:00" >/proc/ide/ide3/config
  25  *
  26  * All numbers must be specified using pairs of ascii hex digits.
  27  * It is important to note that these writes will be performed
  28  * after waiting for the IDE controller (both interfaces)
  29  * to be completely idle, to ensure no corruption of I/O in progress.
  30  *
  31  * Non-PCI registers can also be written, using "R" in place of "P"
  32  * in the above examples.  The size of the port transfer is determined
  33  * by the number of pairs of hex digits given for the data.  If a two
  34  * digit value is given, the write will be a byte operation; if four
  35  * digits are used, the write will be performed as a 16-bit operation;
  36  * and if eight digits are specified, a 32-bit "dword" write will be
  37  * performed.  Odd numbers of digits are not permitted.
  38  *
  39  * If there is an error *anywhere* in the string of registers/data
  40  * then *none* of the writes will be performed.
  41  *
  42  * Drive/Driver settings can be retrieved by reading the drive's
  43  * "settings" files.  e.g.    "cat /proc/ide0/hda/settings"
  44  * To write a new value "val" into a specific setting "name", use:
  45  *   echo "name:val" >/proc/ide/ide0/hda/settings
  46  *
  47  * Also useful, "cat /proc/ide0/hda/[identify, smart_values,
  48  * smart_thresholds, capabilities]" will issue an IDENTIFY /
  49  * PACKET_IDENTIFY / SMART_READ_VALUES / SMART_READ_THRESHOLDS /
  50  * SENSE CAPABILITIES command to /dev/hda, and then dump out the
  51  * returned data as 256 16-bit words.  The "hdparm" utility will
  52  * be updated someday soon to use this mechanism.
  53  *
  54  * Feel free to develop and distribute fancy GUI configuration
  55  * utilities for your favorite PCI chipsets.  I'll be working on
  56  * one for the Promise 20246 someday soon.  -ml
  57  *
  58  */
  59
  60 #include <linux/config.h>
  61 #include <linux/module.h>
  62
  63 #include <asm/uaccess.h>
  64 #include <linux/errno.h>
  65 #include <linux/sched.h>
  66 #include <linux/proc_fs.h>
  67 #include <linux/stat.h>
  68 #include <linux/mm.h>
  69 #include <linux/pci.h>
  70 #include <linux/ctype.h>
  71 #include <linux/hdreg.h>
  72 #include <linux/ide.h>
  73 #include <linux/seq_file.h>
  74
  75 #include <asm/io.h>
  76
  77 static int proc_ide_write_config(struct file *file, const char __user *buffer,
  78                                  unsigned long count, void *data)
  79 {
  80         ide_hwif_t      *hwif = (ide_hwif_t *)data;
  81         ide_hwgroup_t *mygroup = (ide_hwgroup_t *)(hwif->hwgroup);
  82         ide_hwgroup_t *mategroup = NULL;
  83         unsigned long timeout;
  84         unsigned long flags;
  85         const char *start = NULL, *msg = NULL;
  86         struct entry { u32 val; u16 reg; u8 size; u8 pci; } *prog, *q, *r;
  87         int want_pci = 0;
  88         char *buf, *s;
  89         int err;
  90
  91         if (hwif->mate && hwif->mate->hwgroup)
  92                 mategroup = (ide_hwgroup_t *)(hwif->mate->hwgroup);
  93
  94         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
  95                 return -EACCES;
  96
  97         if (count >= PAGE_SIZE)
  98                 return -EINVAL;
  99
 100         s = buf = (char *)__get_free_page(GFP_USER);
 101         if (!buf)
 102                 return -ENOMEM;
 103
 104         err = -ENOMEM;
 105         q = prog = (struct entry *)__get_free_page(GFP_USER);
 106         if (!prog)
 107                 goto out;
 108
 109         err = -EFAULT;
 110         if (copy_from_user(buf, buffer, count))
 111                 goto out1;
 112
 113         buf[count] = '\0';
 114
 115         while (isspace(*s))
 116                 s++;
 117
 118         while (*s) {
 119                 char *p;
 120                 int digits;
 121
 122                 start = s;
 123
 124                 if ((char *)(q + 1) > (char *)prog + PAGE_SIZE) {
 125                         msg = "too many entries";
 126                         goto parse_error;
 127                 }
 128
 129                 switch (*s++) {
 130                         case 'R':       q->pci = 0;
 131                                         break;
 132                         case 'P':       q->pci = 1;
 133                                         want_pci = 1;
 134                                         break;
 135                         default:        msg = "expected 'R' or 'P'";
 136                                         goto parse_error;
 137                 }
 138
 139                 q->reg = simple_strtoul(s, &p, 16);
 140                 digits = p - s;
 141                 if (!digits || digits > 4 || (q->pci && q->reg > 0xff)) {
 142                         msg = "bad/missing register number";
 143                         goto parse_error;
 144                 }
 145                 if (*p++ != ':') {
 146                         msg = "missing ':'";
 147                         goto parse_error;
 148                 }
 149                 q->val = simple_strtoul(p, &s, 16);
 150                 digits = s - p;
 151                 if (digits != 2 && digits != 4 && digits != 8) {
 152                         msg = "bad data, 2/4/8 digits required";
 153                         goto parse_error;
 154                 }
 155                 q->size = digits / 2;
 156
 157                 if (q->pci) {
 158 #ifdef CONFIG_BLK_DEV_IDEPCI
 159                         if (q->reg & (q->size - 1)) {
 160                                 msg = "misaligned access";
 161                                 goto parse_error;
 162                         }
 163 #else
 164                         msg = "not a PCI device";
 165                         goto parse_error;
 166 #endif  /* CONFIG_BLK_DEV_IDEPCI */
 167                 }
 168
 169                 q++;
 170
 171                 if (*s && !isspace(*s++)) {
 172                         msg = "expected whitespace after data";
 173                         goto parse_error;
 174                 }
 175                 while (isspace(*s))
 176                         s++;
 177         }
 178
 179         /*
 180          * What follows below is fucking insane, even for IDE people.
 181          * For now I've dealt with the obvious problems on the parsing
 182          * side, but IMNSHO we should simply remove the write access
 183          * to /proc/ide/.../config, killing that FPOS completely.
 184          */
 185
 186         err = -EBUSY;
 187         timeout = jiffies + (3 * HZ);
 188         spin_lock_irqsave(&ide_lock, flags);
 189         while (mygroup->busy ||
 190                (mategroup && mategroup->busy)) {
 191                 spin_unlock_irqrestore(&ide_lock, flags);
 192                 if (time_after(jiffies, timeout)) {
 193                         printk("/proc/ide/%s/config: channel(s) busy, cannot write\n", hwif->name);
 194                         goto out1;
 195                 }
 196                 spin_lock_irqsave(&ide_lock, flags);
 197         }
 198
 199 #ifdef CONFIG_BLK_DEV_IDEPCI
 200         if (want_pci && (!hwif->pci_dev || hwif->pci_dev->vendor)) {
 201                 spin_unlock_irqrestore(&ide_lock, flags);
 202                 printk("proc_ide: PCI registers not accessible for %s\n",
 203                         hwif->name);
 204                 err = -EINVAL;
 205                 goto out1;
 206         }
 207 #endif  /* CONFIG_BLK_DEV_IDEPCI */
 208
 209         for (r = prog; r < q; r++) {
 210                 unsigned int reg = r->reg, val = r->val;
 211                 if (r->pci) {
 212 #ifdef CONFIG_BLK_DEV_IDEPCI
 213                         int rc = 0;
 214                         struct pci_dev *dev = hwif->pci_dev;
 215                         switch (q->size) {
 216                                 case 1: msg = "byte";
 217                                         rc = pci_write_config_byte(dev, reg, val);
 218                                         break;
 219                                 case 2: msg = "word";
 220                                         rc = pci_write_config_word(dev, reg, val);
 221                                         break;
 222                                 case 4: msg = "dword";
 223                                         rc = pci_write_config_dword(dev, reg, val);
 224                                         break;
 225                         }
 226                         if (rc) {
 227                                 spin_unlock_irqrestore(&ide_lock, flags);
 228                                 printk("proc_ide_write_config: error writing %s at bus %02x dev %02x reg 0x%x value 0x%x\n",
 229                                         msg, dev->bus->number, dev->devfn, reg, val);
 230                                 printk("proc_ide_write_config: error %d\n", rc);
 231                                 err = -EIO;
 232                                 goto out1;
 233                         }
 234 #endif  /* CONFIG_BLK_DEV_IDEPCI */
 235                 } else {        /* not pci */
 236                         switch (r->size) {
 237                                 case 1: hwif->OUTB(val, reg);
 238                                         break;
 239                                 case 2: hwif->OUTW(val, reg);
 240                                         break;
 241                                 case 4: hwif->OUTL(val, reg);
 242                                         break;
 243                         }
 244                 }
 245         }
 246         spin_unlock_irqrestore(&ide_lock, flags);
 247         err = count;
 248 out1:
 249         free_page((unsigned long)prog);
 250 out:
 251         free_page((unsigned long)buf);
 252         return err;
 253
 254 parse_error:
 255         printk("parse error\n");
 256         printk("proc_ide: error: %s: '%s'\n", msg, start);
 257         err = -EINVAL;
 258         goto out1;
 259 }
 260
 261 static int proc_ide_read_config
 262         (char *page, char **start, off_t off, int count, int *eof, void *data)
 263 {
 264         char            *out = page;
 265         int             len;
 266
 267 #ifdef CONFIG_BLK_DEV_IDEPCI
 268         ide_hwif_t      *hwif = (ide_hwif_t *)data;
 269         struct pci_dev  *dev = hwif->pci_dev;
 270         if ((hwif->pci_dev && hwif->pci_dev->vendor) && dev && dev->bus) {
 271                 int reg = 0;
 272
 273                 out += sprintf(out, "pci bus %02x device %02x vendor %04x "
 274                                 "device %04x channel %d\n",
 275                         dev->bus->number, dev->devfn,
 276                         hwif->pci_dev->vendor, hwif->pci_dev->device,
 277                         hwif->channel);
 278                 do {
 279                         u8 val;
 280                         int rc = pci_read_config_byte(dev, reg, &val);
 281                         if (rc) {
 282                                 printk("proc_ide_read_config: error %d reading"
 283                                         " bus %02x dev %02x reg 0x%02x\n",
 284                                         rc, dev->bus->number, dev->devfn, reg);
 285                                 out += sprintf(out, "??%c",
 286                                         (++reg & 0xf) ? ' ' : '\n');
 287                         } else
 288                                 out += sprintf(out, "%02x%c",
 289                                         val, (++reg & 0xf) ? ' ' : '\n');
 290                 } while (reg < 0x100);
 291         } else
 292 #endif  /* CONFIG_BLK_DEV_IDEPCI */
 293                 out += sprintf(out, "(none)\n");
 294         len = out - page;
 295         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 296 }
 297
 298 static int proc_ide_read_imodel
 299         (char *page, char **start, off_t off, int count, int *eof, void *data)
 300 {
 301         ide_hwif_t      *hwif = (ide_hwif_t *) data;
 302         int             len;
 303         const char      *name;
 304
 305         /*
 306          * Neither ide_unknown nor ide_forced should be set at this point.
 307          */
 308         switch (hwif->chipset) {
 309                 case ide_generic:       name = "generic";       break;
 310                 case ide_pci:           name = "pci";           break;
 311                 case ide_cmd640:        name = "cmd640";        break;
 312                 case ide_dtc2278:       name = "dtc2278";       break;
 313                 case ide_ali14xx:       name = "ali14xx";       break;
 314                 case ide_qd65xx:        name = "qd65xx";        break;
 315                 case ide_umc8672:       name = "umc8672";       break;
 316                 case ide_ht6560b:       name = "ht6560b";       break;
 317                 case ide_pdc4030:       name = "pdc4030";       break;
 318                 case ide_rz1000:        name = "rz1000";        break;
 319                 case ide_trm290:        name = "trm290";        break;
 320                 case ide_cmd646:        name = "cmd646";        break;
 321                 case ide_cy82c693:      name = "cy82c693";      break;
 322                 case ide_4drives:       name = "4drives";       break;
 323                 case ide_pmac:          name = "mac-io";        break;
 324                 default:                name = "(unknown)";     break;
 325         }
 326         len = sprintf(page, "%s\n", name);
 327         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 328 }
 329
 330 static int proc_ide_read_mate
 331         (char *page, char **start, off_t off, int count, int *eof, void *data)
 332 {
 333         ide_hwif_t      *hwif = (ide_hwif_t *) data;
 334         int             len;
 335
 336         if (hwif && hwif->mate && hwif->mate->present)
 337                 len = sprintf(page, "%s\n", hwif->mate->name);
 338         else
 339                 len = sprintf(page, "(none)\n");
 340         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 341 }
 342
 343 static int proc_ide_read_channel
 344         (char *page, char **start, off_t off, int count, int *eof, void *data)
 345 {
 346         ide_hwif_t      *hwif = (ide_hwif_t *) data;
 347         int             len;
 348
 349         page[0] = hwif->channel ? '1' : '0';
 350         page[1] = '\n';
 351         len = 2;
 352         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 353 }
 354
 355 static int proc_ide_read_identify
 356         (char *page, char **start, off_t off, int count, int *eof, void *data)
 357 {
 358         ide_drive_t     *drive = (ide_drive_t *)data;
 359         int             len = 0, i = 0;
 360         int             err = 0;
 361
 362         len = sprintf(page, "\n");
 363
 364         if (drive) {
 365                 unsigned short *val = (unsigned short *) page;
 366
 367                 BUG_ON(!drive->driver);
 368
 369                 err = taskfile_lib_get_identify(drive, page);
 370                 if (!err) {
 371                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
 372                         page = out;
 373                         do {
 374                                 out += sprintf(out, "%04x%c",
 375                                         le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
 376                                 val += 1;
 377                         } while (i < (SECTOR_WORDS * 2));
 378                         len = out - page;
 379                 }
 380         }
 381         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 382 }
 383
 384 static int proc_ide_read_settings
 385         (char *page, char **start, off_t off, int count, int *eof, void *data)
 386 {
 387         ide_drive_t     *drive = (ide_drive_t *) data;
 388         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
 389         char            *out = page;
 390         int             len, rc, mul_factor, div_factor;
 391
 392         down(&ide_setting_sem);
 393         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 394         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 395         while(setting) {
 396                 mul_factor = setting->mul_factor;
 397                 div_factor = setting->div_factor;
 398                 out += sprintf(out, "%-24s", setting->name);
 399                 if ((rc = ide_read_setting(drive, setting)) >= 0)
 400                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 401                 else
 402                         out += sprintf(out, "%-16s", "write-only");
 403                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 404                 if (setting->rw & SETTING_READ)
 405                         out += sprintf(out, "r");
 406                 if (setting->rw & SETTING_WRITE)
 407                         out += sprintf(out, "w");
 408                 out += sprintf(out, "\n");
 409                 setting = setting->next;
 410         }
 411         len = out - page;
 412         up(&ide_setting_sem);
 413         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 414 }
 415
 416 #define MAX_LEN 30
 417
 418 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 419                                    unsigned long count, void *data)
 420 {
 421         ide_drive_t     *drive = (ide_drive_t *) data;
 422         char            name[MAX_LEN + 1];
 423         int             for_real = 0;
 424         unsigned long   n;
 425         ide_settings_t  *setting;
 426         char *buf, *s;
 427
 428         if (!capable(CAP_SYS_ADMIN))
 429                 return -EACCES;
 430
 431         if (count >= PAGE_SIZE)
 432                 return -EINVAL;
 433
 434         s = buf = (char *)__get_free_page(GFP_USER);
 435         if (!buf)
 436                 return -ENOMEM;
 437
 438         if (copy_from_user(buf, buffer, count)) {
 439                 free_page((unsigned long)buf);
 440                 return -EFAULT;
 441         }
 442
 443         buf[count] = '\0';
 444
 445         /*
 446          * Skip over leading whitespace
 447          */
 448         while (count && isspace(*s)) {
 449                 --count;
 450                 ++s;
 451         }
 452         /*
 453          * Do one full pass to verify all parameters,
 454          * then do another to actually write the new settings.
 455          */
 456         do {
 457                 char *p = s;
 458                 n = count;
 459                 while (n > 0) {
 460                         unsigned val;
 461                         char *q = p;
 462
 463                         while (n > 0 && *p != ':') {
 464                                 --n;
 465                                 p++;
 466                         }
 467                         if (*p != ':')
 468                                 goto parse_error;
 469                         if (p - q > MAX_LEN)
 470                                 goto parse_error;
 471                         memcpy(name, q, p - q);
 472                         name[p - q] = 0;
 473
 474                         if (n > 0) {
 475                                 --n;
 476                                 p++;
 477                         } else
 478                                 goto parse_error;
 479
 480                         val = simple_strtoul(p, &q, 10);
 481                         n -= q - p;
 482                         p = q;
 483                         if (n > 0 && !isspace(*p))
 484                                 goto parse_error;
 485                         while (n > 0 && isspace(*p)) {
 486                                 --n;
 487                                 ++p;
 488                         }
 489
 490                         down(&ide_setting_sem);
 491                         setting = ide_find_setting_by_name(drive, name);
 492                         if (!setting)
 493                         {
 494                                 up(&ide_setting_sem);
 495                                 goto parse_error;
 496                         }
 497                         if (for_real)
 498                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
 499                         up(&ide_setting_sem);
 500                 }
 501         } while (!for_real++);
 502         free_page((unsigned long)buf);
 503         return count;
 504 parse_error:
 505         free_page((unsigned long)buf);
 506         printk("proc_ide_write_settings(): parse error\n");
 507         return -EINVAL;
 508 }
 509
 510 int proc_ide_read_capacity
 511         (char *page, char **start, off_t off, int count, int *eof, void *data)
 512 {
 513         ide_drive_t     *drive = (ide_drive_t *) data;
 514         int             len;
 515
 516         len = sprintf(page,"%llu\n",
 517                       (long long) (DRIVER(drive)->capacity(drive)));
 518         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 519 }
 520
 521 int proc_ide_read_geometry
 522         (char *page, char **start, off_t off, int count, int *eof, void *data)
 523 {
 524         ide_drive_t     *drive = (ide_drive_t *) data;
 525         char            *out = page;
 526         int             len;
 527
 528         out += sprintf(out,"physical     %d/%d/%d\n",
 529                         drive->cyl, drive->head, drive->sect);
 530         out += sprintf(out,"logical      %d/%d/%d\n",
 531                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 532
 533         len = out - page;
 534         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 535 }
 536
 537 EXPORT_SYMBOL(proc_ide_read_geometry);
 538
 539 static int proc_ide_read_dmodel
 540         (char *page, char **start, off_t off, int count, int *eof, void *data)
 541 {
 542         ide_drive_t     *drive = (ide_drive_t *) data;
 543         struct hd_driveid *id = drive->id;
 544         int             len;
 545
 546         len = sprintf(page, "%.40s\n",
 547                 (id && id->model[0]) ? (char *)id->model : "(none)");
 548         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 549 }
 550
 551 static int proc_ide_read_driver
 552         (char *page, char **start, off_t off, int count, int *eof, void *data)
 553 {
 554         ide_drive_t     *drive = (ide_drive_t *) data;
 555         ide_driver_t    *driver = drive->driver;
 556         int             len;
 557
 558         len = sprintf(page, "%s version %s\n",
 559                         driver->name, driver->version);
 560         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 561 }
 562
 563 static int proc_ide_write_driver
 564         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 565 {
 566         ide_drive_t     *drive = (ide_drive_t *) data;
 567         char name[32];
 568
 569         if (!capable(CAP_SYS_ADMIN))
 570                 return -EACCES;
 571         if (count > 31)
 572                 count = 31;
 573         if (copy_from_user(name, buffer, count))
 574                 return -EFAULT;
 575         name[count] = '\0';
 576         if (ide_replace_subdriver(drive, name))
 577                 return -EINVAL;
 578         return count;
 579 }
 580
 581 static int proc_ide_read_media
 582         (char *page, char **start, off_t off, int count, int *eof, void *data)
 583 {
 584         ide_drive_t     *drive = (ide_drive_t *) data;
 585         const char      *media;
 586         int             len;
 587
 588         switch (drive->media) {
 589                 case ide_disk:  media = "disk\n";
 590                                 break;
 591                 case ide_cdrom: media = "cdrom\n";
 592                                 break;
 593                 case ide_tape:  media = "tape\n";
 594                                 break;
 595                 case ide_floppy:media = "floppy\n";
 596                                 break;
 597                 default:        media = "UNKNOWN\n";
 598                                 break;
 599         }
 600         strcpy(page,media);
 601         len = strlen(media);
 602         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 603 }
 604
 605 static ide_proc_entry_t generic_drive_entries[] = {
 606         { "driver",     S_IFREG|S_IRUGO,        proc_ide_read_driver,   proc_ide_write_driver },
 607         { "identify",   S_IFREG|S_IRUSR,        proc_ide_read_identify, NULL },
 608         { "media",      S_IFREG|S_IRUGO,        proc_ide_read_media,    NULL },
 609         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_dmodel,   NULL },
 610         { "settings",   S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings },
 611         { NULL, 0, NULL, NULL }
 612 };
 613
 614 void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 615 {
 616         struct proc_dir_entry *ent;
 617
 618         if (!dir || !p)
 619                 return;
 620         while (p->name != NULL) {
 621                 ent = create_proc_entry(p->name, p->mode, dir);
 622                 if (!ent) return;
 623                 ent->nlink = 1;
 624                 ent->data = data;
 625                 ent->read_proc = p->read_proc;
 626                 ent->write_proc = p->write_proc;
 627                 p++;
 628         }
 629 }
 630
 631 void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 632 {
 633         if (!dir || !p)
 634                 return;
 635         while (p->name != NULL) {
 636                 remove_proc_entry(p->name, dir);
 637                 p++;
 638         }
 639 }
 640
 641 static void create_proc_ide_drives(ide_hwif_t *hwif)
 642 {
 643         int     d;
 644         struct proc_dir_entry *ent;
 645         struct proc_dir_entry *parent = hwif->proc;
 646         char name[64];
 647
 648         for (d = 0; d < MAX_DRIVES; d++) {
 649                 ide_drive_t *drive = &hwif->drives[d];
 650
 651                 if (!drive->present)
 652                         continue;
 653                 if (drive->proc)
 654                         continue;
 655
 656                 drive->proc = proc_mkdir(drive->name, parent);
 657                 if (drive->proc)
 658                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 659                 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 660                 ent = proc_symlink(drive->name, proc_ide_root, name);
 661                 if (!ent) return;
 662         }
 663 }
 664
 665 static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
 666 {
 667         ide_driver_t *driver = drive->driver;
 668
 669         if (drive->proc) {
 670                 ide_remove_proc_entries(drive->proc, driver->proc);
 671                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 672                 remove_proc_entry(drive->name, proc_ide_root);
 673                 remove_proc_entry(drive->name, hwif->proc);
 674                 drive->proc = NULL;
 675         }
 676 }
 677
 678 void destroy_proc_ide_drives(ide_hwif_t *hwif)
 679 {
 680         int     d;
 681
 682         for (d = 0; d < MAX_DRIVES; d++) {
 683                 ide_drive_t *drive = &hwif->drives[d];
 684                 if (drive->proc)
 685                         destroy_proc_ide_device(hwif, drive);
 686         }
 687 }
 688
 689 static ide_proc_entry_t hwif_entries[] = {
 690         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 691         { "config",     S_IFREG|S_IRUGO|S_IWUSR,proc_ide_read_config,   proc_ide_write_config },
 692         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 693         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 694         { NULL, 0, NULL, NULL }
 695 };
 696
 697 void create_proc_ide_interfaces(void)
 698 {
 699         int     h;
 700
 701         for (h = 0; h < MAX_HWIFS; h++) {
 702                 ide_hwif_t *hwif = &ide_hwifs[h];
 703
 704                 if (!hwif->present)
 705                         continue;
 706                 if (!hwif->proc) {
 707                         hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 708                         if (!hwif->proc)
 709                                 return;
 710                         ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 711                 }
 712                 create_proc_ide_drives(hwif);
 713         }
 714 }
 715
 716 EXPORT_SYMBOL(create_proc_ide_interfaces);
 717
 718 #ifdef CONFIG_BLK_DEV_IDEPCI
 719 void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
 720 {
 721         create_proc_info_entry(name, 0, proc_ide_root, get_info);
 722 }
 723
 724 EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
 725 #endif
 726
 727 void destroy_proc_ide_interfaces(void)
 728 {
 729         int     h;
 730
 731         for (h = 0; h < MAX_HWIFS; h++) {
 732                 ide_hwif_t *hwif = &ide_hwifs[h];
 733                 int exist = (hwif->proc != NULL);
 734 #if 0
 735                 if (!hwif->present)
 736                         continue;
 737 #endif
 738                 if (exist) {
 739                         destroy_proc_ide_drives(hwif);
 740                         ide_remove_proc_entries(hwif->proc, hwif_entries);
 741                         remove_proc_entry(hwif->name, proc_ide_root);
 742                         hwif->proc = NULL;
 743                 } else
 744                         continue;
 745         }
 746 }
 747
 748 EXPORT_SYMBOL(destroy_proc_ide_interfaces);
 749
 750 extern struct seq_operations ide_drivers_op;
 751 static int ide_drivers_open(struct inode *inode, struct file *file)
 752 {
 753         return seq_open(file, &ide_drivers_op);
 754 }
 755 static struct file_operations ide_drivers_operations = {
 756         .open           = ide_drivers_open,
 757         .read           = seq_read,
 758         .llseek         = seq_lseek,
 759         .release        = seq_release,
 760 };
 761
 762 void proc_ide_create(void)
 763 {
 764         struct proc_dir_entry *entry;
 765
 766         if (!proc_ide_root)
 767                 return;
 768
 769         create_proc_ide_interfaces();
 770
 771         entry = create_proc_entry("drivers", 0, proc_ide_root);
 772         if (entry)
 773                 entry->proc_fops = &ide_drivers_operations;
 774 }
 775
 776 void proc_ide_destroy(void)
 777 {
 778         remove_proc_entry("ide/drivers", proc_ide_root);
 779         destroy_proc_ide_interfaces();
 780         remove_proc_entry("ide", NULL);
 781 }