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 #if !defined(__mc68000__) && !defined(CONFIG_APUS)
 237
 238 /*
 239 * Geert Uytterhoeven
 240 *
 241 * unless you can explain me what it really does.
 242 * On m68k, we don't have outw() and outl() yet,
 243 * and I need a good reason to implement it.
 244 *
 245 * BTW, IMHO the main remaining portability problem with the IDE driver
 246 * is that it mixes IO (ioport) and MMIO (iomem) access on different platforms.
 247 *
 248 * I think all accesses should be done using
 249 *
 250 *     ide_in[bwl](ide_device_instance, offset)
 251 *     ide_out[bwl](ide_device_instance, value, offset)
 252 *
 253 * so the architecture specific code can #define ide_{in,out}[bwl] to the
 254 * appropriate function.
 255 *
 256 */
 257                         switch (r->size) {
 258                                 case 1: hwif->OUTB(val, reg);
 259                                         break;
 260                                 case 2: hwif->OUTW(val, reg);
 261                                         break;
 262                                 case 4: hwif->OUTL(val, reg);
 263                                         break;
 264                         }
 265 #endif /* !__mc68000__ && !CONFIG_APUS */
 266                 }
 267         }
 268         spin_unlock_irqrestore(&ide_lock, flags);
 269         err = count;
 270 out1:
 271         free_page((unsigned long)prog);
 272 out:
 273         free_page((unsigned long)buf);
 274         return err;
 275
 276 parse_error:
 277         printk("parse error\n");
 278         printk("proc_ide: error: %s: '%s'\n", msg, start);
 279         err = -EINVAL;
 280         goto out1;
 281 }
 282
 283 int proc_ide_read_config
 284         (char *page, char **start, off_t off, int count, int *eof, void *data)
 285 {
 286         char            *out = page;
 287         int             len;
 288
 289 #ifdef CONFIG_BLK_DEV_IDEPCI
 290         ide_hwif_t      *hwif = (ide_hwif_t *)data;
 291         struct pci_dev  *dev = hwif->pci_dev;
 292         if ((hwif->pci_dev && hwif->pci_dev->vendor) && dev && dev->bus) {
 293                 int reg = 0;
 294
 295                 out += sprintf(out, "pci bus %02x device %02x vendor %04x "
 296                                 "device %04x channel %d\n",
 297                         dev->bus->number, dev->devfn,
 298                         hwif->pci_dev->vendor, hwif->pci_dev->device,
 299                         hwif->channel);
 300                 do {
 301                         u8 val;
 302                         int rc = pci_read_config_byte(dev, reg, &val);
 303                         if (rc) {
 304                                 printk("proc_ide_read_config: error %d reading"
 305                                         " bus %02x dev %02x reg 0x%02x\n",
 306                                         rc, dev->bus->number, dev->devfn, reg);
 307                                 out += sprintf(out, "??%c",
 308                                         (++reg & 0xf) ? ' ' : '\n');
 309                         } else
 310                                 out += sprintf(out, "%02x%c",
 311                                         val, (++reg & 0xf) ? ' ' : '\n');
 312                 } while (reg < 0x100);
 313         } else
 314 #endif  /* CONFIG_BLK_DEV_IDEPCI */
 315                 out += sprintf(out, "(none)\n");
 316         len = out - page;
 317         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 318 }
 319
 320 EXPORT_SYMBOL(proc_ide_read_config);
 321
 322 static int proc_ide_read_imodel
 323         (char *page, char **start, off_t off, int count, int *eof, void *data)
 324 {
 325         ide_hwif_t      *hwif = (ide_hwif_t *) data;
 326         int             len;
 327         const char      *name;
 328
 329         /*
 330          * Neither ide_unknown nor ide_forced should be set at this point.
 331          */
 332         switch (hwif->chipset) {
 333                 case ide_generic:       name = "generic";       break;
 334                 case ide_pci:           name = "pci";           break;
 335                 case ide_cmd640:        name = "cmd640";        break;
 336                 case ide_dtc2278:       name = "dtc2278";       break;
 337                 case ide_ali14xx:       name = "ali14xx";       break;
 338                 case ide_qd65xx:        name = "qd65xx";        break;
 339                 case ide_umc8672:       name = "umc8672";       break;
 340                 case ide_ht6560b:       name = "ht6560b";       break;
 341                 case ide_pdc4030:       name = "pdc4030";       break;
 342                 case ide_rz1000:        name = "rz1000";        break;
 343                 case ide_trm290:        name = "trm290";        break;
 344                 case ide_cmd646:        name = "cmd646";        break;
 345                 case ide_cy82c693:      name = "cy82c693";      break;
 346                 case ide_4drives:       name = "4drives";       break;
 347                 case ide_pmac:          name = "mac-io";        break;
 348                 case ide_pc9800:        name = "pc9800";        break;
 349                 default:                name = "(unknown)";     break;
 350         }
 351         len = sprintf(page, "%s\n", name);
 352         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 353 }
 354
 355 EXPORT_SYMBOL(proc_ide_read_imodel);
 356
 357 int proc_ide_read_mate
 358         (char *page, char **start, off_t off, int count, int *eof, void *data)
 359 {
 360         ide_hwif_t      *hwif = (ide_hwif_t *) data;
 361         int             len;
 362
 363         if (hwif && hwif->mate && hwif->mate->present)
 364                 len = sprintf(page, "%s\n", hwif->mate->name);
 365         else
 366                 len = sprintf(page, "(none)\n");
 367         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 368 }
 369
 370 EXPORT_SYMBOL(proc_ide_read_mate);
 371
 372 int proc_ide_read_channel
 373         (char *page, char **start, off_t off, int count, int *eof, void *data)
 374 {
 375         ide_hwif_t      *hwif = (ide_hwif_t *) data;
 376         int             len;
 377
 378         page[0] = hwif->channel ? '1' : '0';
 379         page[1] = '\n';
 380         len = 2;
 381         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 382 }
 383
 384 EXPORT_SYMBOL(proc_ide_read_channel);
 385
 386 int proc_ide_read_identify
 387         (char *page, char **start, off_t off, int count, int *eof, void *data)
 388 {
 389         ide_drive_t     *drive = (ide_drive_t *)data;
 390         int             len = 0, i = 0;
 391         int             err = 0;
 392
 393         len = sprintf(page, "\n");
 394
 395         if (drive)
 396         {
 397                 unsigned short *val = (unsigned short *) page;
 398
 399                 /*
 400                  *      The current code can't handle a driverless
 401                  *      identify query taskfile. Now the right fix is
 402                  *      to add a 'default' driver but that is a bit
 403                  *      more work.
 404                  *
 405                  *      FIXME: this has to be fixed for hotswap devices
 406                  */
 407
 408                 if(DRIVER(drive))
 409                         err = taskfile_lib_get_identify(drive, page);
 410                 else    /* This relies on the ID changes */
 411                         val = (unsigned short *)drive->id;
 412
 413                 if(!err)
 414                 {
 415                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
 416                         page = out;
 417                         do {
 418                                 out += sprintf(out, "%04x%c",
 419                                         le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
 420                                 val += 1;
 421                         } while (i < (SECTOR_WORDS * 2));
 422                         len = out - page;
 423                 }
 424         }
 425         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 426 }
 427
 428 EXPORT_SYMBOL(proc_ide_read_identify);
 429
 430 int proc_ide_read_settings
 431         (char *page, char **start, off_t off, int count, int *eof, void *data)
 432 {
 433         ide_drive_t     *drive = (ide_drive_t *) data;
 434         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
 435         char            *out = page;
 436         int             len, rc, mul_factor, div_factor;
 437
 438         down(&ide_setting_sem);
 439         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 440         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 441         while(setting) {
 442                 mul_factor = setting->mul_factor;
 443                 div_factor = setting->div_factor;
 444                 out += sprintf(out, "%-24s", setting->name);
 445                 if ((rc = ide_read_setting(drive, setting)) >= 0)
 446                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 447                 else
 448                         out += sprintf(out, "%-16s", "write-only");
 449                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 450                 if (setting->rw & SETTING_READ)
 451                         out += sprintf(out, "r");
 452                 if (setting->rw & SETTING_WRITE)
 453                         out += sprintf(out, "w");
 454                 out += sprintf(out, "\n");
 455                 setting = setting->next;
 456         }
 457         len = out - page;
 458         up(&ide_setting_sem);
 459         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 460 }
 461
 462 EXPORT_SYMBOL(proc_ide_read_settings);
 463
 464 #define MAX_LEN 30
 465
 466 int proc_ide_write_settings(struct file *file, const char __user *buffer,
 467                             unsigned long count, void *data)
 468 {
 469         ide_drive_t     *drive = (ide_drive_t *) data;
 470         char            name[MAX_LEN + 1];
 471         int             for_real = 0;
 472         unsigned long   n;
 473         ide_settings_t  *setting;
 474         char *buf, *s;
 475
 476         if (!capable(CAP_SYS_ADMIN))
 477                 return -EACCES;
 478
 479         if (count >= PAGE_SIZE)
 480                 return -EINVAL;
 481
 482         s = buf = (char *)__get_free_page(GFP_USER);
 483         if (!buf)
 484                 return -ENOMEM;
 485
 486         if (copy_from_user(buf, buffer, count)) {
 487                 free_page((unsigned long)buf);
 488                 return -EFAULT;
 489         }
 490
 491         buf[count] = '\0';
 492
 493         /*
 494          * Skip over leading whitespace
 495          */
 496         while (count && isspace(*s)) {
 497                 --count;
 498                 ++s;
 499         }
 500         /*
 501          * Do one full pass to verify all parameters,
 502          * then do another to actually write the new settings.
 503          */
 504         do {
 505                 char *p = s;
 506                 n = count;
 507                 while (n > 0) {
 508                         unsigned val;
 509                         char *q = p;
 510
 511                         while (n > 0 && *p != ':') {
 512                                 --n;
 513                                 p++;
 514                         }
 515                         if (*p != ':')
 516                                 goto parse_error;
 517                         if (p - q > MAX_LEN)
 518                                 goto parse_error;
 519                         memcpy(name, q, p - q);
 520                         name[p - q] = 0;
 521
 522                         if (n > 0) {
 523                                 --n;
 524                                 p++;
 525                         } else
 526                                 goto parse_error;
 527
 528                         val = simple_strtoul(p, &q, 10);
 529                         n -= q - p;
 530                         p = q;
 531                         if (n > 0 && !isspace(*p))
 532                                 goto parse_error;
 533                         while (n > 0 && isspace(*p)) {
 534                                 --n;
 535                                 ++p;
 536                         }
 537
 538                         down(&ide_setting_sem);
 539                         setting = ide_find_setting_by_name(drive, name);
 540                         if (!setting)
 541                         {
 542                                 up(&ide_setting_sem);
 543                                 goto parse_error;
 544                         }
 545                         if (for_real)
 546                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
 547                         up(&ide_setting_sem);
 548                 }
 549         } while (!for_real++);
 550         free_page((unsigned long)buf);
 551         return count;
 552 parse_error:
 553         free_page((unsigned long)buf);
 554         printk("proc_ide_write_settings(): parse error\n");
 555         return -EINVAL;
 556 }
 557
 558 EXPORT_SYMBOL(proc_ide_write_settings);
 559
 560 int proc_ide_read_capacity
 561         (char *page, char **start, off_t off, int count, int *eof, void *data)
 562 {
 563         ide_drive_t     *drive = (ide_drive_t *) data;
 564         int             len;
 565
 566         len = sprintf(page,"%llu\n",
 567                       (long long) (DRIVER(drive)->capacity(drive)));
 568         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 569 }
 570
 571 EXPORT_SYMBOL(proc_ide_read_capacity);
 572
 573 int proc_ide_read_geometry
 574         (char *page, char **start, off_t off, int count, int *eof, void *data)
 575 {
 576         ide_drive_t     *drive = (ide_drive_t *) data;
 577         char            *out = page;
 578         int             len;
 579
 580         out += sprintf(out,"physical     %d/%d/%d\n",
 581                         drive->cyl, drive->head, drive->sect);
 582         out += sprintf(out,"logical      %d/%d/%d\n",
 583                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 584
 585         len = out - page;
 586         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 587 }
 588
 589 EXPORT_SYMBOL(proc_ide_read_geometry);
 590
 591 int proc_ide_read_dmodel
 592         (char *page, char **start, off_t off, int count, int *eof, void *data)
 593 {
 594         ide_drive_t     *drive = (ide_drive_t *) data;
 595         struct hd_driveid *id = drive->id;
 596         int             len;
 597
 598         len = sprintf(page, "%.40s\n",
 599                 (id && id->model[0]) ? (char *)id->model : "(none)");
 600         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 601 }
 602
 603 EXPORT_SYMBOL(proc_ide_read_dmodel);
 604
 605 int proc_ide_read_driver
 606         (char *page, char **start, off_t off, int count, int *eof, void *data)
 607 {
 608         ide_drive_t     *drive = (ide_drive_t *) data;
 609         ide_driver_t    *driver = drive->driver;
 610         int             len;
 611
 612         len = sprintf(page, "%s version %s\n",
 613                         driver->name, driver->version);
 614         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 615 }
 616
 617 EXPORT_SYMBOL(proc_ide_read_driver);
 618
 619 int proc_ide_write_driver
 620         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 621 {
 622         ide_drive_t     *drive = (ide_drive_t *) data;
 623         char name[32];
 624
 625         if (!capable(CAP_SYS_ADMIN))
 626                 return -EACCES;
 627         if (count > 31)
 628                 count = 31;
 629         if (copy_from_user(name, buffer, count))
 630                 return -EFAULT;
 631         name[count] = '\0';
 632         if (ide_replace_subdriver(drive, name))
 633                 return -EINVAL;
 634         return count;
 635 }
 636
 637 EXPORT_SYMBOL(proc_ide_write_driver);
 638
 639 int proc_ide_read_media
 640         (char *page, char **start, off_t off, int count, int *eof, void *data)
 641 {
 642         ide_drive_t     *drive = (ide_drive_t *) data;
 643         const char      *media;
 644         int             len;
 645
 646         switch (drive->media) {
 647                 case ide_disk:  media = "disk\n";
 648                                 break;
 649                 case ide_cdrom: media = "cdrom\n";
 650                                 break;
 651                 case ide_tape:  media = "tape\n";
 652                                 break;
 653                 case ide_floppy:media = "floppy\n";
 654                                 break;
 655                 default:        media = "UNKNOWN\n";
 656                                 break;
 657         }
 658         strcpy(page,media);
 659         len = strlen(media);
 660         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 661 }
 662
 663 EXPORT_SYMBOL(proc_ide_read_media);
 664
 665 static ide_proc_entry_t generic_drive_entries[] = {
 666         { "driver",     S_IFREG|S_IRUGO,        proc_ide_read_driver,   proc_ide_write_driver },
 667         { "identify",   S_IFREG|S_IRUSR,        proc_ide_read_identify, NULL },
 668         { "media",      S_IFREG|S_IRUGO,        proc_ide_read_media,    NULL },
 669         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_dmodel,   NULL },
 670         { "settings",   S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings },
 671         { NULL, 0, NULL, NULL }
 672 };
 673
 674 void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 675 {
 676         struct proc_dir_entry *ent;
 677
 678         if (!dir || !p)
 679                 return;
 680         while (p->name != NULL) {
 681                 ent = create_proc_entry(p->name, p->mode, dir);
 682                 if (!ent) return;
 683                 ent->nlink = 1;
 684                 ent->data = data;
 685                 ent->read_proc = p->read_proc;
 686                 ent->write_proc = p->write_proc;
 687                 p++;
 688         }
 689 }
 690
 691 EXPORT_SYMBOL(ide_add_proc_entries);
 692
 693 void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 694 {
 695         if (!dir || !p)
 696                 return;
 697         while (p->name != NULL) {
 698                 remove_proc_entry(p->name, dir);
 699                 p++;
 700         }
 701 }
 702
 703 EXPORT_SYMBOL(ide_remove_proc_entries);
 704
 705 void create_proc_ide_drives(ide_hwif_t *hwif)
 706 {
 707         int     d;
 708         struct proc_dir_entry *ent;
 709         struct proc_dir_entry *parent = hwif->proc;
 710         char name[64];
 711
 712         for (d = 0; d < MAX_DRIVES; d++) {
 713                 ide_drive_t *drive = &hwif->drives[d];
 714
 715                 if (!drive->present)
 716                         continue;
 717                 if (drive->proc)
 718                         continue;
 719
 720                 drive->proc = proc_mkdir(drive->name, parent);
 721                 if (drive->proc)
 722                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 723                 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 724                 ent = proc_symlink(drive->name, proc_ide_root, name);
 725                 if (!ent) return;
 726         }
 727 }
 728
 729 EXPORT_SYMBOL(create_proc_ide_drives);
 730
 731 void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
 732 {
 733         ide_driver_t *driver = drive->driver;
 734
 735         if (drive->proc) {
 736                 ide_remove_proc_entries(drive->proc, driver->proc);
 737                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 738                 remove_proc_entry(drive->name, proc_ide_root);
 739                 remove_proc_entry(drive->name, hwif->proc);
 740                 drive->proc = NULL;
 741         }
 742 }
 743
 744 EXPORT_SYMBOL(destroy_proc_ide_device);
 745
 746 void destroy_proc_ide_drives(ide_hwif_t *hwif)
 747 {
 748         int     d;
 749
 750         for (d = 0; d < MAX_DRIVES; d++) {
 751                 ide_drive_t *drive = &hwif->drives[d];
 752                 if (drive->proc)
 753                         destroy_proc_ide_device(hwif, drive);
 754         }
 755 }
 756
 757 EXPORT_SYMBOL(destroy_proc_ide_drives);
 758
 759 static ide_proc_entry_t hwif_entries[] = {
 760         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 761         { "config",     S_IFREG|S_IRUGO|S_IWUSR,proc_ide_read_config,   proc_ide_write_config },
 762         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 763         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 764         { NULL, 0, NULL, NULL }
 765 };
 766
 767 void create_proc_ide_interfaces(void)
 768 {
 769         int     h;
 770
 771         for (h = 0; h < MAX_HWIFS; h++) {
 772                 ide_hwif_t *hwif = &ide_hwifs[h];
 773
 774                 if (!hwif->present)
 775                         continue;
 776                 if (!hwif->proc) {
 777                         hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 778                         if (!hwif->proc)
 779                                 return;
 780                         ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 781                 }
 782                 create_proc_ide_drives(hwif);
 783         }
 784 }
 785
 786 EXPORT_SYMBOL(create_proc_ide_interfaces);
 787
 788 #ifdef CONFIG_BLK_DEV_IDEPCI
 789 void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
 790 {
 791         create_proc_info_entry(name, 0, proc_ide_root, get_info);
 792 }
 793
 794 EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
 795 #endif
 796
 797 void destroy_proc_ide_interfaces(void)
 798 {
 799         int     h;
 800
 801         for (h = 0; h < MAX_HWIFS; h++) {
 802                 ide_hwif_t *hwif = &ide_hwifs[h];
 803                 int exist = (hwif->proc != NULL);
 804 #if 0
 805                 if (!hwif->present)
 806                         continue;
 807 #endif
 808                 if (exist) {
 809                         destroy_proc_ide_drives(hwif);
 810                         ide_remove_proc_entries(hwif->proc, hwif_entries);
 811                         remove_proc_entry(hwif->name, proc_ide_root);
 812                         hwif->proc = NULL;
 813                 } else
 814                         continue;
 815         }
 816 }
 817
 818 EXPORT_SYMBOL(destroy_proc_ide_interfaces);
 819
 820 extern struct seq_operations ide_drivers_op;
 821 static int ide_drivers_open(struct inode *inode, struct file *file)
 822 {
 823         return seq_open(file, &ide_drivers_op);
 824 }
 825 static struct file_operations ide_drivers_operations = {
 826         .open           = ide_drivers_open,
 827         .read           = seq_read,
 828         .llseek         = seq_lseek,
 829         .release        = seq_release,
 830 };
 831
 832 void proc_ide_create(void)
 833 {
 834         struct proc_dir_entry *entry;
 835
 836         if (!proc_ide_root)
 837                 return;
 838
 839         create_proc_ide_interfaces();
 840
 841         entry = create_proc_entry("drivers", 0, proc_ide_root);
 842         if (entry)
 843                 entry->proc_fops = &ide_drivers_operations;
 844 }
 845
 846 EXPORT_SYMBOL(proc_ide_create);
 847
 848 void proc_ide_destroy(void)
 849 {
 850         remove_proc_entry("ide/drivers", proc_ide_root);
 851         destroy_proc_ide_interfaces();
 852         remove_proc_entry("ide", 0);
 853 }
 854
 855 EXPORT_SYMBOL(proc_ide_destroy);