git.oblomov.eu Git - linux-2.6/blob - drivers/ide/ide-proc.c

   1 /*
   2  *  Copyright (C) 1997-1998     Mark Lord
   3  *  Copyright (C) 2003          Red Hat <alan@redhat.com>
   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 const struct ide_devset *ide_find_setting(const struct ide_devset **st,
 128                                                  char *name)
 129 {
 130         while (*st) {
 131                 if (strcmp((*st)->name, name) == 0)
 132                         break;
 133                 st++;
 134         }
 135         return *st;
 136 }
 137
 138 /**
 139  *      ide_read_setting        -       read an IDE setting
 140  *      @drive: drive to read from
 141  *      @setting: drive setting
 142  *
 143  *      Read a drive setting and return the value. The caller
 144  *      must hold the ide_setting_mtx when making this call.
 145  *
 146  *      BUGS: the data return and error are the same return value
 147  *      so an error -EINVAL and true return of the same value cannot
 148  *      be told apart
 149  */
 150
 151 static int ide_read_setting(ide_drive_t *drive,
 152                             const struct ide_devset *setting)
 153 {
 154         int val = -EINVAL;
 155
 156         if ((setting->flags & S_READ)) {
 157                 unsigned long flags;
 158
 159                 spin_lock_irqsave(&ide_lock, flags);
 160                 val = setting->get(drive);
 161                 spin_unlock_irqrestore(&ide_lock, flags);
 162         }
 163
 164         return val;
 165 }
 166
 167 /**
 168  *      ide_write_setting       -       read an IDE setting
 169  *      @drive: drive to read from
 170  *      @setting: drive setting
 171  *      @val: value
 172  *
 173  *      Write a drive setting if it is possible. The caller
 174  *      must hold the ide_setting_mtx when making this call.
 175  *
 176  *      BUGS: the data return and error are the same return value
 177  *      so an error -EINVAL and true return of the same value cannot
 178  *      be told apart
 179  *
 180  *      FIXME:  This should be changed to enqueue a special request
 181  *      to the driver to change settings, and then wait on a sema for completion.
 182  *      The current scheme of polling is kludgy, though safe enough.
 183  */
 184
 185 static int ide_write_setting(ide_drive_t *drive,
 186                              const struct ide_devset *setting, int val)
 187 {
 188         if (!capable(CAP_SYS_ADMIN))
 189                 return -EACCES;
 190         if (setting->set && (setting->flags & S_NOLOCK))
 191                 return setting->set(drive, val);
 192         if (!(setting->flags & S_WRITE))
 193                 return -EPERM;
 194         if (val < setting->min || val > setting->max)
 195                 return -EINVAL;
 196         if (ide_spin_wait_hwgroup(drive))
 197                 return -EBUSY;
 198         setting->set(drive, val);
 199         spin_unlock_irq(&ide_lock);
 200         return 0;
 201 }
 202
 203 static ide_devset_get(xfer_rate, current_speed);
 204
 205 static int set_xfer_rate (ide_drive_t *drive, int arg)
 206 {
 207         ide_task_t task;
 208         int err;
 209
 210         if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
 211                 return -EINVAL;
 212
 213         memset(&task, 0, sizeof(task));
 214         task.tf.command = ATA_CMD_SET_FEATURES;
 215         task.tf.feature = SETFEATURES_XFER;
 216         task.tf.nsect   = (u8)arg;
 217         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
 218                         IDE_TFLAG_IN_NSECT;
 219
 220         err = ide_no_data_taskfile(drive, &task);
 221
 222         if (!err) {
 223                 ide_set_xfer_rate(drive, (u8) arg);
 224                 ide_driveid_update(drive);
 225         }
 226         return err;
 227 }
 228
 229 ide_devset_rw_nolock(current_speed, 0, 70, xfer_rate);
 230 ide_devset_rw_nolock(io_32bit, 0, 1 + (SUPPORT_VLB_SYNC << 1), io_32bit);
 231 ide_devset_rw_nolock(keepsettings, 0, 1, ksettings);
 232 ide_devset_rw_nolock(unmaskirq, 0, 1, unmaskirq);
 233 ide_devset_rw_nolock(using_dma, 0, 1, using_dma);
 234
 235 ide_devset_w_nolock(pio_mode, 0, 255, pio_mode);
 236
 237 ide_devset_rw(init_speed, 0, 70, init_speed);
 238 ide_devset_rw(nice1, 0, 1, nice1);
 239 ide_devset_rw(number, 0, 3, dn);
 240
 241 static const struct ide_devset *ide_generic_settings[] = {
 242         &ide_devset_current_speed,
 243         &ide_devset_init_speed,
 244         &ide_devset_io_32bit,
 245         &ide_devset_keepsettings,
 246         &ide_devset_nice1,
 247         &ide_devset_number,
 248         &ide_devset_pio_mode,
 249         &ide_devset_unmaskirq,
 250         &ide_devset_using_dma,
 251         NULL
 252 };
 253
 254 static void proc_ide_settings_warn(void)
 255 {
 256         static int warned;
 257
 258         if (warned)
 259                 return;
 260
 261         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 262                             "obsolete, and will be removed soon!\n");
 263         warned = 1;
 264 }
 265
 266 static int proc_ide_read_settings
 267         (char *page, char **start, off_t off, int count, int *eof, void *data)
 268 {
 269         const struct ide_devset *setting, **g, **d;
 270         ide_drive_t     *drive = (ide_drive_t *) data;
 271         char            *out = page;
 272         int             len, rc, mul_factor, div_factor;
 273
 274         proc_ide_settings_warn();
 275
 276         mutex_lock(&ide_setting_mtx);
 277         g = ide_generic_settings;
 278         d = drive->settings;
 279         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 280         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 281         while (*g || (d && *d)) {
 282                 /* read settings in the alphabetical order */
 283                 if (*g && d && *d) {
 284                         if (strcmp((*d)->name, (*g)->name) < 0)
 285                                 setting = *d++;
 286                         else
 287                                 setting = *g++;
 288                 } else if (d && *d) {
 289                         setting = *d++;
 290                 } else
 291                         setting = *g++;
 292                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 293                 div_factor = setting->divf ? setting->divf(drive) : 1;
 294                 out += sprintf(out, "%-24s", setting->name);
 295                 rc = ide_read_setting(drive, setting);
 296                 if (rc >= 0)
 297                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 298                 else
 299                         out += sprintf(out, "%-16s", "write-only");
 300                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 301                 if (setting->flags & S_READ)
 302                         out += sprintf(out, "r");
 303                 if (setting->flags & S_WRITE)
 304                         out += sprintf(out, "w");
 305                 out += sprintf(out, "\n");
 306         }
 307         len = out - page;
 308         mutex_unlock(&ide_setting_mtx);
 309         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 310 }
 311
 312 #define MAX_LEN 30
 313
 314 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 315                                    unsigned long count, void *data)
 316 {
 317         ide_drive_t     *drive = (ide_drive_t *) data;
 318         char            name[MAX_LEN + 1];
 319         int             for_real = 0, mul_factor, div_factor;
 320         unsigned long   n;
 321
 322         const struct ide_devset *setting;
 323         char *buf, *s;
 324
 325         if (!capable(CAP_SYS_ADMIN))
 326                 return -EACCES;
 327
 328         proc_ide_settings_warn();
 329
 330         if (count >= PAGE_SIZE)
 331                 return -EINVAL;
 332
 333         s = buf = (char *)__get_free_page(GFP_USER);
 334         if (!buf)
 335                 return -ENOMEM;
 336
 337         if (copy_from_user(buf, buffer, count)) {
 338                 free_page((unsigned long)buf);
 339                 return -EFAULT;
 340         }
 341
 342         buf[count] = '\0';
 343
 344         /*
 345          * Skip over leading whitespace
 346          */
 347         while (count && isspace(*s)) {
 348                 --count;
 349                 ++s;
 350         }
 351         /*
 352          * Do one full pass to verify all parameters,
 353          * then do another to actually write the new settings.
 354          */
 355         do {
 356                 char *p = s;
 357                 n = count;
 358                 while (n > 0) {
 359                         unsigned val;
 360                         char *q = p;
 361
 362                         while (n > 0 && *p != ':') {
 363                                 --n;
 364                                 p++;
 365                         }
 366                         if (*p != ':')
 367                                 goto parse_error;
 368                         if (p - q > MAX_LEN)
 369                                 goto parse_error;
 370                         memcpy(name, q, p - q);
 371                         name[p - q] = 0;
 372
 373                         if (n > 0) {
 374                                 --n;
 375                                 p++;
 376                         } else
 377                                 goto parse_error;
 378
 379                         val = simple_strtoul(p, &q, 10);
 380                         n -= q - p;
 381                         p = q;
 382                         if (n > 0 && !isspace(*p))
 383                                 goto parse_error;
 384                         while (n > 0 && isspace(*p)) {
 385                                 --n;
 386                                 ++p;
 387                         }
 388
 389                         mutex_lock(&ide_setting_mtx);
 390                         /* generic settings first, then driver specific ones */
 391                         setting = ide_find_setting(ide_generic_settings, name);
 392                         if (!setting) {
 393                                 if (drive->settings)
 394                                         setting = ide_find_setting(drive->settings, name);
 395                                 if (!setting) {
 396                                         mutex_unlock(&ide_setting_mtx);
 397                                         goto parse_error;
 398                                 }
 399                         }
 400                         if (for_real) {
 401                                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 402                                 div_factor = setting->divf ? setting->divf(drive) : 1;
 403                                 ide_write_setting(drive, setting, val * div_factor / mul_factor);
 404                         }
 405                         mutex_unlock(&ide_setting_mtx);
 406                 }
 407         } while (!for_real++);
 408         free_page((unsigned long)buf);
 409         return count;
 410 parse_error:
 411         free_page((unsigned long)buf);
 412         printk("proc_ide_write_settings(): parse error\n");
 413         return -EINVAL;
 414 }
 415
 416 int proc_ide_read_capacity
 417         (char *page, char **start, off_t off, int count, int *eof, void *data)
 418 {
 419         int len = sprintf(page, "%llu\n", (long long)0x7fffffff);
 420         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 421 }
 422
 423 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 424
 425 int proc_ide_read_geometry
 426         (char *page, char **start, off_t off, int count, int *eof, void *data)
 427 {
 428         ide_drive_t     *drive = (ide_drive_t *) data;
 429         char            *out = page;
 430         int             len;
 431
 432         out += sprintf(out, "physical     %d/%d/%d\n",
 433                         drive->cyl, drive->head, drive->sect);
 434         out += sprintf(out, "logical      %d/%d/%d\n",
 435                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 436
 437         len = out - page;
 438         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 439 }
 440
 441 EXPORT_SYMBOL(proc_ide_read_geometry);
 442
 443 static int proc_ide_read_dmodel
 444         (char *page, char **start, off_t off, int count, int *eof, void *data)
 445 {
 446         ide_drive_t     *drive = (ide_drive_t *) data;
 447         char            *m = (char *)&drive->id[ATA_ID_PROD];
 448         int             len;
 449
 450         len = sprintf(page, "%.40s\n", m[0] ? m : "(none)");
 451         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 452 }
 453
 454 static int proc_ide_read_driver
 455         (char *page, char **start, off_t off, int count, int *eof, void *data)
 456 {
 457         ide_drive_t     *drive = (ide_drive_t *) data;
 458         struct device   *dev = &drive->gendev;
 459         ide_driver_t    *ide_drv;
 460         int             len;
 461
 462         if (dev->driver) {
 463                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 464                 len = sprintf(page, "%s version %s\n",
 465                                 dev->driver->name, ide_drv->version);
 466         } else
 467                 len = sprintf(page, "ide-default version 0.9.newide\n");
 468         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 469 }
 470
 471 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 472 {
 473         struct device *dev = &drive->gendev;
 474         int ret = 1;
 475         int err;
 476
 477         device_release_driver(dev);
 478         /* FIXME: device can still be in use by previous driver */
 479         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 480         err = device_attach(dev);
 481         if (err < 0)
 482                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 483                         __func__, err);
 484         drive->driver_req[0] = 0;
 485         if (dev->driver == NULL) {
 486                 err = device_attach(dev);
 487                 if (err < 0)
 488                         printk(KERN_WARNING
 489                                 "IDE: %s: device_attach(2) error: %d\n",
 490                                 __func__, err);
 491         }
 492         if (dev->driver && !strcmp(dev->driver->name, driver))
 493                 ret = 0;
 494
 495         return ret;
 496 }
 497
 498 static int proc_ide_write_driver
 499         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 500 {
 501         ide_drive_t     *drive = (ide_drive_t *) data;
 502         char name[32];
 503
 504         if (!capable(CAP_SYS_ADMIN))
 505                 return -EACCES;
 506         if (count > 31)
 507                 count = 31;
 508         if (copy_from_user(name, buffer, count))
 509                 return -EFAULT;
 510         name[count] = '\0';
 511         if (ide_replace_subdriver(drive, name))
 512                 return -EINVAL;
 513         return count;
 514 }
 515
 516 static int proc_ide_read_media
 517         (char *page, char **start, off_t off, int count, int *eof, void *data)
 518 {
 519         ide_drive_t     *drive = (ide_drive_t *) data;
 520         const char      *media;
 521         int             len;
 522
 523         switch (drive->media) {
 524         case ide_disk:          media = "disk\n";       break;
 525         case ide_cdrom:         media = "cdrom\n";      break;
 526         case ide_tape:          media = "tape\n";       break;
 527         case ide_floppy:        media = "floppy\n";     break;
 528         case ide_optical:       media = "optical\n";    break;
 529         default:                media = "UNKNOWN\n";    break;
 530         }
 531         strcpy(page, media);
 532         len = strlen(media);
 533         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 534 }
 535
 536 static ide_proc_entry_t generic_drive_entries[] = {
 537         { "driver",     S_IFREG|S_IRUGO,         proc_ide_read_driver,
 538                                                  proc_ide_write_driver },
 539         { "identify",   S_IFREG|S_IRUSR,         proc_ide_read_identify, NULL },
 540         { "media",      S_IFREG|S_IRUGO,         proc_ide_read_media,    NULL },
 541         { "model",      S_IFREG|S_IRUGO,         proc_ide_read_dmodel,   NULL },
 542         { "settings",   S_IFREG|S_IRUSR|S_IWUSR, proc_ide_read_settings,
 543                                                  proc_ide_write_settings },
 544         { NULL, 0, NULL, NULL }
 545 };
 546
 547 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 548 {
 549         struct proc_dir_entry *ent;
 550
 551         if (!dir || !p)
 552                 return;
 553         while (p->name != NULL) {
 554                 ent = create_proc_entry(p->name, p->mode, dir);
 555                 if (!ent) return;
 556                 ent->data = data;
 557                 ent->read_proc = p->read_proc;
 558                 ent->write_proc = p->write_proc;
 559                 p++;
 560         }
 561 }
 562
 563 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 564 {
 565         if (!dir || !p)
 566                 return;
 567         while (p->name != NULL) {
 568                 remove_proc_entry(p->name, dir);
 569                 p++;
 570         }
 571 }
 572
 573 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 574 {
 575         mutex_lock(&ide_setting_mtx);
 576         drive->settings = driver->settings;
 577         mutex_unlock(&ide_setting_mtx);
 578
 579         ide_add_proc_entries(drive->proc, driver->proc, drive);
 580 }
 581
 582 EXPORT_SYMBOL(ide_proc_register_driver);
 583
 584 /**
 585  *      ide_proc_unregister_driver      -       remove driver specific data
 586  *      @drive: drive
 587  *      @driver: driver
 588  *
 589  *      Clean up the driver specific /proc files and IDE settings
 590  *      for a given drive.
 591  *
 592  *      Takes ide_setting_mtx and ide_lock.
 593  *      Caller must hold none of the locks.
 594  */
 595
 596 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 597 {
 598         unsigned long flags;
 599
 600         ide_remove_proc_entries(drive->proc, driver->proc);
 601
 602         mutex_lock(&ide_setting_mtx);
 603         spin_lock_irqsave(&ide_lock, flags);
 604         /*
 605          * ide_setting_mtx protects the settings list
 606          * ide_lock protects the use of settings
 607          *
 608          * so we need to hold both, ide_settings_sem because we want to
 609          * modify the settings list, and ide_lock because we cannot take
 610          * a setting out that is being used.
 611          *
 612          * OTOH both ide_{read,write}_setting are only ever used under
 613          * ide_setting_mtx.
 614          */
 615         drive->settings = NULL;
 616         spin_unlock_irqrestore(&ide_lock, flags);
 617         mutex_unlock(&ide_setting_mtx);
 618 }
 619 EXPORT_SYMBOL(ide_proc_unregister_driver);
 620
 621 void ide_proc_port_register_devices(ide_hwif_t *hwif)
 622 {
 623         int     d;
 624         struct proc_dir_entry *ent;
 625         struct proc_dir_entry *parent = hwif->proc;
 626         char name[64];
 627
 628         for (d = 0; d < MAX_DRIVES; d++) {
 629                 ide_drive_t *drive = &hwif->drives[d];
 630
 631                 if (!drive->present)
 632                         continue;
 633                 if (drive->proc)
 634                         continue;
 635
 636                 drive->proc = proc_mkdir(drive->name, parent);
 637                 if (drive->proc)
 638                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 639                 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 640                 ent = proc_symlink(drive->name, proc_ide_root, name);
 641                 if (!ent) return;
 642         }
 643 }
 644
 645 void ide_proc_unregister_device(ide_drive_t *drive)
 646 {
 647         if (drive->proc) {
 648                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 649                 remove_proc_entry(drive->name, proc_ide_root);
 650                 remove_proc_entry(drive->name, drive->hwif->proc);
 651                 drive->proc = NULL;
 652         }
 653 }
 654
 655 static ide_proc_entry_t hwif_entries[] = {
 656         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 657         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 658         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 659         { NULL, 0, NULL, NULL }
 660 };
 661
 662 void ide_proc_register_port(ide_hwif_t *hwif)
 663 {
 664         if (!hwif->proc) {
 665                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 666
 667                 if (!hwif->proc)
 668                         return;
 669
 670                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 671         }
 672 }
 673
 674 void ide_proc_unregister_port(ide_hwif_t *hwif)
 675 {
 676         if (hwif->proc) {
 677                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 678                 remove_proc_entry(hwif->name, proc_ide_root);
 679                 hwif->proc = NULL;
 680         }
 681 }
 682
 683 static int proc_print_driver(struct device_driver *drv, void *data)
 684 {
 685         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
 686         struct seq_file *s = data;
 687
 688         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 689
 690         return 0;
 691 }
 692
 693 static int ide_drivers_show(struct seq_file *s, void *p)
 694 {
 695         int err;
 696
 697         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 698         if (err < 0)
 699                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 700                         __func__, err);
 701         return 0;
 702 }
 703
 704 static int ide_drivers_open(struct inode *inode, struct file *file)
 705 {
 706         return single_open(file, &ide_drivers_show, NULL);
 707 }
 708
 709 static const struct file_operations ide_drivers_operations = {
 710         .owner          = THIS_MODULE,
 711         .open           = ide_drivers_open,
 712         .read           = seq_read,
 713         .llseek         = seq_lseek,
 714         .release        = single_release,
 715 };
 716
 717 void proc_ide_create(void)
 718 {
 719         proc_ide_root = proc_mkdir("ide", NULL);
 720
 721         if (!proc_ide_root)
 722                 return;
 723
 724         proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
 725 }
 726
 727 void proc_ide_destroy(void)
 728 {
 729         remove_proc_entry("drivers", proc_ide_root);
 730         remove_proc_entry("ide", NULL);
 731 }