drivers/ide/ide-proc.c

   1 /*
   2  *  Copyright (C) 1997-1998     Mark Lord
   3  *  Copyright (C) 2003          Red Hat
   4  *
   5  *  Some code was moved here from ide.c, see it for original copyrights.
   6  */
   7
   8 /*
   9  * This is the /proc/ide/ filesystem implementation.
  10  *
  11  * Drive/Driver settings can be retrieved by reading the drive's
  12  * "settings" files.  e.g.    "cat /proc/ide0/hda/settings"
  13  * To write a new value "val" into a specific setting "name", use:
  14  *   echo "name:val" >/proc/ide/ide0/hda/settings
  15  */
  16
  17 #include <linux/module.h>
  18
  19 #include <asm/uaccess.h>
  20 #include <linux/errno.h>
  21 #include <linux/proc_fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/mm.h>
  24 #include <linux/pci.h>
  25 #include <linux/ctype.h>
  26 #include <linux/ide.h>
  27 #include <linux/seq_file.h>
  28
  29 #include <asm/io.h>
  30
  31 static struct proc_dir_entry *proc_ide_root;
  32
  33 static int proc_ide_read_imodel
  34         (char *page, char **start, off_t off, int count, int *eof, void *data)
  35 {
  36         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  37         int             len;
  38         const char      *name;
  39
  40         switch (hwif->chipset) {
  41         case ide_generic:       name = "generic";       break;
  42         case ide_pci:           name = "pci";           break;
  43         case ide_cmd640:        name = "cmd640";        break;
  44         case ide_dtc2278:       name = "dtc2278";       break;
  45         case ide_ali14xx:       name = "ali14xx";       break;
  46         case ide_qd65xx:        name = "qd65xx";        break;
  47         case ide_umc8672:       name = "umc8672";       break;
  48         case ide_ht6560b:       name = "ht6560b";       break;
  49         case ide_rz1000:        name = "rz1000";        break;
  50         case ide_trm290:        name = "trm290";        break;
  51         case ide_cmd646:        name = "cmd646";        break;
  52         case ide_cy82c693:      name = "cy82c693";      break;
  53         case ide_4drives:       name = "4drives";       break;
  54         case ide_pmac:          name = "mac-io";        break;
  55         case ide_au1xxx:        name = "au1xxx";        break;
  56         case ide_palm3710:      name = "palm3710";      break;
  57         case ide_acorn:         name = "acorn";         break;
  58         default:                name = "(unknown)";     break;
  59         }
  60         len = sprintf(page, "%s\n", name);
  61         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  62 }
  63
  64 static int proc_ide_read_mate
  65         (char *page, char **start, off_t off, int count, int *eof, void *data)
  66 {
  67         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  68         int             len;
  69
  70         if (hwif && hwif->mate)
  71                 len = sprintf(page, "%s\n", hwif->mate->name);
  72         else
  73                 len = sprintf(page, "(none)\n");
  74         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  75 }
  76
  77 static int proc_ide_read_channel
  78         (char *page, char **start, off_t off, int count, int *eof, void *data)
  79 {
  80         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  81         int             len;
  82
  83         page[0] = hwif->channel ? '1' : '0';
  84         page[1] = '\n';
  85         len = 2;
  86         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  87 }
  88
  89 static int proc_ide_read_identify
  90         (char *page, char **start, off_t off, int count, int *eof, void *data)
  91 {
  92         ide_drive_t     *drive = (ide_drive_t *)data;
  93         int             len = 0, i = 0;
  94         int             err = 0;
  95
  96         len = sprintf(page, "\n");
  97
  98         if (drive) {
  99                 __le16 *val = (__le16 *)page;
 100
 101                 err = taskfile_lib_get_identify(drive, page);
 102                 if (!err) {
 103                         char *out = (char *)page + SECTOR_SIZE;
 104
 105                         page = out;
 106                         do {
 107                                 out += sprintf(out, "%04x%c",
 108                                         le16_to_cpup(val), (++i & 7) ? ' ' : '\n');
 109                                 val += 1;
 110                         } while (i < SECTOR_SIZE / 2);
 111                         len = out - page;
 112                 }
 113         }
 114         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 115 }
 116
 117 /**
 118  *      ide_find_setting        -       find a specific setting
 119  *      @st: setting table pointer
 120  *      @name: setting name
 121  *
 122  *      Scan's the setting table for a matching entry and returns
 123  *      this or NULL if no entry is found. The caller must hold the
 124  *      setting semaphore
 125  */
 126
 127 static
 128 const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st,
 129                                                char *name)
 130 {
 131         while (st->name) {
 132                 if (strcmp(st->name, name) == 0)
 133                         break;
 134                 st++;
 135         }
 136         return st->name ? st : NULL;
 137 }
 138
 139 /**
 140  *      ide_read_setting        -       read an IDE setting
 141  *      @drive: drive to read from
 142  *      @setting: drive setting
 143  *
 144  *      Read a drive setting and return the value. The caller
 145  *      must hold the ide_setting_mtx when making this call.
 146  *
 147  *      BUGS: the data return and error are the same return value
 148  *      so an error -EINVAL and true return of the same value cannot
 149  *      be told apart
 150  */
 151
 152 static int ide_read_setting(ide_drive_t *drive,
 153                             const struct ide_proc_devset *setting)
 154 {
 155         const struct ide_devset *ds = setting->setting;
 156         int val = -EINVAL;
 157
 158         if (ds->get) {
 159                 unsigned long flags;
 160
 161                 spin_lock_irqsave(&ide_lock, flags);
 162                 val = ds->get(drive);
 163                 spin_unlock_irqrestore(&ide_lock, flags);
 164         }
 165
 166         return val;
 167 }
 168
 169 /**
 170  *      ide_write_setting       -       read an IDE setting
 171  *      @drive: drive to read from
 172  *      @setting: drive setting
 173  *      @val: value
 174  *
 175  *      Write a drive setting if it is possible. The caller
 176  *      must hold the ide_setting_mtx when making this call.
 177  *
 178  *      BUGS: the data return and error are the same return value
 179  *      so an error -EINVAL and true return of the same value cannot
 180  *      be told apart
 181  *
 182  *      FIXME:  This should be changed to enqueue a special request
 183  *      to the driver to change settings, and then wait on a sema for completion.
 184  *      The current scheme of polling is kludgy, though safe enough.
 185  */
 186
 187 static int ide_write_setting(ide_drive_t *drive,
 188                              const struct ide_proc_devset *setting, int val)
 189 {
 190         const struct ide_devset *ds = setting->setting;
 191
 192         if (!capable(CAP_SYS_ADMIN))
 193                 return -EACCES;
 194         if (!ds->set)
 195                 return -EPERM;
 196         if ((ds->flags & DS_SYNC)
 197             && (val < setting->min || val > setting->max))
 198                 return -EINVAL;
 199         return ide_devset_execute(drive, ds, val);
 200 }
 201
 202 ide_devset_get(xfer_rate, current_speed);
 203
 204 static int set_xfer_rate (ide_drive_t *drive, int arg)
 205 {
 206         ide_task_t task;
 207         int err;
 208
 209         if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
 210                 return -EINVAL;
 211
 212         memset(&task, 0, sizeof(task));
 213         task.tf.command = ATA_CMD_SET_FEATURES;
 214         task.tf.feature = SETFEATURES_XFER;
 215         task.tf.nsect   = (u8)arg;
 216         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
 217                         IDE_TFLAG_IN_NSECT;
 218
 219         err = ide_no_data_taskfile(drive, &task);
 220
 221         if (!err) {
 222                 ide_set_xfer_rate(drive, (u8) arg);
 223                 ide_driveid_update(drive);
 224         }
 225         return err;
 226 }
 227
 228 ide_devset_rw(current_speed, xfer_rate);
 229 ide_devset_rw_field(init_speed, init_speed);
 230 ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1);
 231 ide_devset_rw_field(number, dn);
 232
 233 static const struct ide_proc_devset ide_generic_settings[] = {
 234         IDE_PROC_DEVSET(current_speed, 0, 70),
 235         IDE_PROC_DEVSET(init_speed, 0, 70),
 236         IDE_PROC_DEVSET(io_32bit,  0, 1 + (SUPPORT_VLB_SYNC << 1)),
 237         IDE_PROC_DEVSET(keepsettings, 0, 1),
 238         IDE_PROC_DEVSET(nice1, 0, 1),
 239         IDE_PROC_DEVSET(number, 0, 3),
 240         IDE_PROC_DEVSET(pio_mode, 0, 255),
 241         IDE_PROC_DEVSET(unmaskirq, 0, 1),
 242         IDE_PROC_DEVSET(using_dma, 0, 1),
 243         { 0 },
 244 };
 245
 246 static void proc_ide_settings_warn(void)
 247 {
 248         static int warned;
 249
 250         if (warned)
 251                 return;
 252
 253         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 254                             "obsolete, and will be removed soon!\n");
 255         warned = 1;
 256 }
 257
 258 static int proc_ide_read_settings
 259         (char *page, char **start, off_t off, int count, int *eof, void *data)
 260 {
 261         const struct ide_proc_devset *setting, *g, *d;
 262         const struct ide_devset *ds;
 263         ide_drive_t     *drive = (ide_drive_t *) data;
 264         char            *out = page;
 265         int             len, rc, mul_factor, div_factor;
 266
 267         proc_ide_settings_warn();
 268
 269         mutex_lock(&ide_setting_mtx);
 270         g = ide_generic_settings;
 271         d = drive->settings;
 272         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 273         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 274         while (g->name || (d && d->name)) {
 275                 /* read settings in the alphabetical order */
 276                 if (g->name && d && d->name) {
 277                         if (strcmp(d->name, g->name) < 0)
 278                                 setting = d++;
 279                         else
 280                                 setting = g++;
 281                 } else if (d && d->name) {
 282                         setting = d++;
 283                 } else
 284                         setting = g++;
 285                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 286                 div_factor = setting->divf ? setting->divf(drive) : 1;
 287                 out += sprintf(out, "%-24s", setting->name);
 288                 rc = ide_read_setting(drive, setting);
 289                 if (rc >= 0)
 290                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 291                 else
 292                         out += sprintf(out, "%-16s", "write-only");
 293                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 294                 ds = setting->setting;
 295                 if (ds->get)
 296                         out += sprintf(out, "r");
 297                 if (ds->set)
 298                         out += sprintf(out, "w");
 299                 out += sprintf(out, "\n");
 300         }
 301         len = out - page;
 302         mutex_unlock(&ide_setting_mtx);
 303         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 304 }
 305
 306 #define MAX_LEN 30
 307
 308 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 309                                    unsigned long count, void *data)
 310 {
 311         ide_drive_t     *drive = (ide_drive_t *) data;
 312         char            name[MAX_LEN + 1];
 313         int             for_real = 0, mul_factor, div_factor;
 314         unsigned long   n;
 315
 316         const struct ide_proc_devset *setting;
 317         char *buf, *s;
 318
 319         if (!capable(CAP_SYS_ADMIN))
 320                 return -EACCES;
 321
 322         proc_ide_settings_warn();
 323
 324         if (count >= PAGE_SIZE)
 325                 return -EINVAL;
 326
 327         s = buf = (char *)__get_free_page(GFP_USER);
 328         if (!buf)
 329                 return -ENOMEM;
 330
 331         if (copy_from_user(buf, buffer, count)) {
 332                 free_page((unsigned long)buf);
 333                 return -EFAULT;
 334         }
 335
 336         buf[count] = '\0';
 337
 338         /*
 339          * Skip over leading whitespace
 340          */
 341         while (count && isspace(*s)) {
 342                 --count;
 343                 ++s;
 344         }
 345         /*
 346          * Do one full pass to verify all parameters,
 347          * then do another to actually write the new settings.
 348          */
 349         do {
 350                 char *p = s;
 351                 n = count;
 352                 while (n > 0) {
 353                         unsigned val;
 354                         char *q = p;
 355
 356                         while (n > 0 && *p != ':') {
 357                                 --n;
 358                                 p++;
 359                         }
 360                         if (*p != ':')
 361                                 goto parse_error;
 362                         if (p - q > MAX_LEN)
 363                                 goto parse_error;
 364                         memcpy(name, q, p - q);
 365                         name[p - q] = 0;
 366
 367                         if (n > 0) {
 368                                 --n;
 369                                 p++;
 370                         } else
 371                                 goto parse_error;
 372
 373                         val = simple_strtoul(p, &q, 10);
 374                         n -= q - p;
 375                         p = q;
 376                         if (n > 0 && !isspace(*p))
 377                                 goto parse_error;
 378                         while (n > 0 && isspace(*p)) {
 379                                 --n;
 380                                 ++p;
 381                         }
 382
 383                         mutex_lock(&ide_setting_mtx);
 384                         /* generic settings first, then driver specific ones */
 385                         setting = ide_find_setting(ide_generic_settings, name);
 386                         if (!setting) {
 387                                 if (drive->settings)
 388                                         setting = ide_find_setting(drive->settings, name);
 389                                 if (!setting) {
 390                                         mutex_unlock(&ide_setting_mtx);
 391                                         goto parse_error;
 392                                 }
 393                         }
 394                         if (for_real) {
 395                                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 396                                 div_factor = setting->divf ? setting->divf(drive) : 1;
 397                                 ide_write_setting(drive, setting, val * div_factor / mul_factor);
 398                         }
 399                         mutex_unlock(&ide_setting_mtx);
 400                 }
 401         } while (!for_real++);
 402         free_page((unsigned long)buf);
 403         return count;
 404 parse_error:
 405         free_page((unsigned long)buf);
 406         printk("proc_ide_write_settings(): parse error\n");
 407         return -EINVAL;
 408 }
 409
 410 int proc_ide_read_capacity
 411         (char *page, char **start, off_t off, int count, int *eof, void *data)
 412 {
 413         int len = sprintf(page, "%llu\n", (long long)0x7fffffff);
 414         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 415 }
 416
 417 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 418
 419 int proc_ide_read_geometry
 420         (char *page, char **start, off_t off, int count, int *eof, void *data)
 421 {
 422         ide_drive_t     *drive = (ide_drive_t *) data;
 423         char            *out = page;
 424         int             len;
 425
 426         out += sprintf(out, "physical     %d/%d/%d\n",
 427                         drive->cyl, drive->head, drive->sect);
 428         out += sprintf(out, "logical      %d/%d/%d\n",
 429                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 430
 431         len = out - page;
 432         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 433 }
 434
 435 EXPORT_SYMBOL(proc_ide_read_geometry);
 436
 437 static int proc_ide_read_dmodel
 438         (char *page, char **start, off_t off, int count, int *eof, void *data)
 439 {
 440         ide_drive_t     *drive = (ide_drive_t *) data;
 441         char            *m = (char *)&drive->id[ATA_ID_PROD];
 442         int             len;
 443
 444         len = sprintf(page, "%.40s\n", m[0] ? m : "(none)");
 445         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 446 }
 447
 448 static int proc_ide_read_driver
 449         (char *page, char **start, off_t off, int count, int *eof, void *data)
 450 {
 451         ide_drive_t     *drive = (ide_drive_t *) data;
 452         struct device   *dev = &drive->gendev;
 453         ide_driver_t    *ide_drv;
 454         int             len;
 455
 456         if (dev->driver) {
 457                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 458                 len = sprintf(page, "%s version %s\n",
 459                                 dev->driver->name, ide_drv->version);
 460         } else
 461                 len = sprintf(page, "ide-default version 0.9.newide\n");
 462         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 463 }
 464
 465 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 466 {
 467         struct device *dev = &drive->gendev;
 468         int ret = 1;
 469         int err;
 470
 471         device_release_driver(dev);
 472         /* FIXME: device can still be in use by previous driver */
 473         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 474         err = device_attach(dev);
 475         if (err < 0)
 476                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 477                         __func__, err);
 478         drive->driver_req[0] = 0;
 479         if (dev->driver == NULL) {
 480                 err = device_attach(dev);
 481                 if (err < 0)
 482                         printk(KERN_WARNING
 483                                 "IDE: %s: device_attach(2) error: %d\n",
 484                                 __func__, err);
 485         }
 486         if (dev->driver && !strcmp(dev->driver->name, driver))
 487                 ret = 0;
 488
 489         return ret;
 490 }
 491
 492 static int proc_ide_write_driver
 493         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 494 {
 495         ide_drive_t     *drive = (ide_drive_t *) data;
 496         char name[32];
 497
 498         if (!capable(CAP_SYS_ADMIN))
 499                 return -EACCES;
 500         if (count > 31)
 501                 count = 31;
 502         if (copy_from_user(name, buffer, count))
 503                 return -EFAULT;
 504         name[count] = '\0';
 505         if (ide_replace_subdriver(drive, name))
 506                 return -EINVAL;
 507         return count;
 508 }
 509
 510 static int proc_ide_read_media
 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         const char      *media;
 515         int             len;
 516
 517         switch (drive->media) {
 518         case ide_disk:          media = "disk\n";       break;
 519         case ide_cdrom:         media = "cdrom\n";      break;
 520         case ide_tape:          media = "tape\n";       break;
 521         case ide_floppy:        media = "floppy\n";     break;
 522         case ide_optical:       media = "optical\n";    break;
 523         default:                media = "UNKNOWN\n";    break;
 524         }
 525         strcpy(page, media);
 526         len = strlen(media);
 527         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 528 }
 529
 530 static ide_proc_entry_t generic_drive_entries[] = {
 531         { "driver",     S_IFREG|S_IRUGO,         proc_ide_read_driver,
 532                                                  proc_ide_write_driver },
 533         { "identify",   S_IFREG|S_IRUSR,         proc_ide_read_identify, NULL },
 534         { "media",      S_IFREG|S_IRUGO,         proc_ide_read_media,    NULL },
 535         { "model",      S_IFREG|S_IRUGO,         proc_ide_read_dmodel,   NULL },
 536         { "settings",   S_IFREG|S_IRUSR|S_IWUSR, proc_ide_read_settings,
 537                                                  proc_ide_write_settings },
 538         { NULL, 0, NULL, NULL }
 539 };
 540
 541 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 542 {
 543         struct proc_dir_entry *ent;
 544
 545         if (!dir || !p)
 546                 return;
 547         while (p->name != NULL) {
 548                 ent = create_proc_entry(p->name, p->mode, dir);
 549                 if (!ent) return;
 550                 ent->data = data;
 551                 ent->read_proc = p->read_proc;
 552                 ent->write_proc = p->write_proc;
 553                 p++;
 554         }
 555 }
 556
 557 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 558 {
 559         if (!dir || !p)
 560                 return;
 561         while (p->name != NULL) {
 562                 remove_proc_entry(p->name, dir);
 563                 p++;
 564         }
 565 }
 566
 567 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 568 {
 569         mutex_lock(&ide_setting_mtx);
 570         drive->settings = driver->proc_devsets(drive);
 571         mutex_unlock(&ide_setting_mtx);
 572
 573         ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive);
 574 }
 575
 576 EXPORT_SYMBOL(ide_proc_register_driver);
 577
 578 /**
 579  *      ide_proc_unregister_driver      -       remove driver specific data
 580  *      @drive: drive
 581  *      @driver: driver
 582  *
 583  *      Clean up the driver specific /proc files and IDE settings
 584  *      for a given drive.
 585  *
 586  *      Takes ide_setting_mtx and ide_lock.
 587  *      Caller must hold none of the locks.
 588  */
 589
 590 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 591 {
 592         unsigned long flags;
 593
 594         ide_remove_proc_entries(drive->proc, driver->proc_entries(drive));
 595
 596         mutex_lock(&ide_setting_mtx);
 597         spin_lock_irqsave(&ide_lock, flags);
 598         /*
 599          * ide_setting_mtx protects the settings list
 600          * ide_lock protects the use of settings
 601          *
 602          * so we need to hold both, ide_settings_sem because we want to
 603          * modify the settings list, and ide_lock because we cannot take
 604          * a setting out that is being used.
 605          *
 606          * OTOH both ide_{read,write}_setting are only ever used under
 607          * ide_setting_mtx.
 608          */
 609         drive->settings = NULL;
 610         spin_unlock_irqrestore(&ide_lock, flags);
 611         mutex_unlock(&ide_setting_mtx);
 612 }
 613 EXPORT_SYMBOL(ide_proc_unregister_driver);
 614
 615 void ide_proc_port_register_devices(ide_hwif_t *hwif)
 616 {
 617         int     d;
 618         struct proc_dir_entry *ent;
 619         struct proc_dir_entry *parent = hwif->proc;
 620         char name[64];
 621
 622         for (d = 0; d < MAX_DRIVES; d++) {
 623                 ide_drive_t *drive = &hwif->drives[d];
 624
 625                 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0 || drive->proc)
 626                         continue;
 627
 628                 drive->proc = proc_mkdir(drive->name, parent);
 629                 if (drive->proc)
 630                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 631                 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 632                 ent = proc_symlink(drive->name, proc_ide_root, name);
 633                 if (!ent) return;
 634         }
 635 }
 636
 637 void ide_proc_unregister_device(ide_drive_t *drive)
 638 {
 639         if (drive->proc) {
 640                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 641                 remove_proc_entry(drive->name, proc_ide_root);
 642                 remove_proc_entry(drive->name, drive->hwif->proc);
 643                 drive->proc = NULL;
 644         }
 645 }
 646
 647 static ide_proc_entry_t hwif_entries[] = {
 648         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 649         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 650         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 651         { NULL, 0, NULL, NULL }
 652 };
 653
 654 void ide_proc_register_port(ide_hwif_t *hwif)
 655 {
 656         if (!hwif->proc) {
 657                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 658
 659                 if (!hwif->proc)
 660                         return;
 661
 662                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 663         }
 664 }
 665
 666 void ide_proc_unregister_port(ide_hwif_t *hwif)
 667 {
 668         if (hwif->proc) {
 669                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 670                 remove_proc_entry(hwif->name, proc_ide_root);
 671                 hwif->proc = NULL;
 672         }
 673 }
 674
 675 static int proc_print_driver(struct device_driver *drv, void *data)
 676 {
 677         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
 678         struct seq_file *s = data;
 679
 680         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 681
 682         return 0;
 683 }
 684
 685 static int ide_drivers_show(struct seq_file *s, void *p)
 686 {
 687         int err;
 688
 689         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 690         if (err < 0)
 691                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 692                         __func__, err);
 693         return 0;
 694 }
 695
 696 static int ide_drivers_open(struct inode *inode, struct file *file)
 697 {
 698         return single_open(file, &ide_drivers_show, NULL);
 699 }
 700
 701 static const struct file_operations ide_drivers_operations = {
 702         .owner          = THIS_MODULE,
 703         .open           = ide_drivers_open,
 704         .read           = seq_read,
 705         .llseek         = seq_lseek,
 706         .release        = single_release,
 707 };
 708
 709 void proc_ide_create(void)
 710 {
 711         proc_ide_root = proc_mkdir("ide", NULL);
 712
 713         if (!proc_ide_root)
 714                 return;
 715
 716         proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
 717 }
 718
 719 void proc_ide_destroy(void)
 720 {
 721         remove_proc_entry("drivers", proc_ide_root);
 722         remove_proc_entry("ide", NULL);
 723 }