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   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  *  Some code was moved here from ide.c, see it for original copyrights.
   8  */
   9
  10 /*
  11  * This is the /proc/ide/ filesystem implementation.
  12  *
  13  * Drive/Driver settings can be retrieved by reading the drive's
  14  * "settings" files.  e.g.    "cat /proc/ide0/hda/settings"
  15  * To write a new value "val" into a specific setting "name", use:
  16  *   echo "name:val" >/proc/ide/ide0/hda/settings
  17  *
  18  * Also useful, "cat /proc/ide0/hda/[identify, smart_values,
  19  * smart_thresholds, capabilities]" will issue an IDENTIFY /
  20  * PACKET_IDENTIFY / SMART_READ_VALUES / SMART_READ_THRESHOLDS /
  21  * SENSE CAPABILITIES command to /dev/hda, and then dump out the
  22  * returned data as 256 16-bit words.  The "hdparm" utility will
  23  * be updated someday soon to use this mechanism.
  24  *
  25  */
  26
  27 #include <linux/module.h>
  28
  29 #include <asm/uaccess.h>
  30 #include <linux/errno.h>
  31 #include <linux/proc_fs.h>
  32 #include <linux/stat.h>
  33 #include <linux/mm.h>
  34 #include <linux/pci.h>
  35 #include <linux/ctype.h>
  36 #include <linux/hdreg.h>
  37 #include <linux/ide.h>
  38 #include <linux/seq_file.h>
  39
  40 #include <asm/io.h>
  41
  42 static struct proc_dir_entry *proc_ide_root;
  43
  44 static int proc_ide_read_imodel
  45         (char *page, char **start, off_t off, int count, int *eof, void *data)
  46 {
  47         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  48         int             len;
  49         const char      *name;
  50
  51         /*
  52          * Neither ide_unknown nor ide_forced should be set at this point.
  53          */
  54         switch (hwif->chipset) {
  55                 case ide_generic:       name = "generic";       break;
  56                 case ide_pci:           name = "pci";           break;
  57                 case ide_cmd640:        name = "cmd640";        break;
  58                 case ide_dtc2278:       name = "dtc2278";       break;
  59                 case ide_ali14xx:       name = "ali14xx";       break;
  60                 case ide_qd65xx:        name = "qd65xx";        break;
  61                 case ide_umc8672:       name = "umc8672";       break;
  62                 case ide_ht6560b:       name = "ht6560b";       break;
  63                 case ide_rz1000:        name = "rz1000";        break;
  64                 case ide_trm290:        name = "trm290";        break;
  65                 case ide_cmd646:        name = "cmd646";        break;
  66                 case ide_cy82c693:      name = "cy82c693";      break;
  67                 case ide_4drives:       name = "4drives";       break;
  68                 case ide_pmac:          name = "mac-io";        break;
  69                 case ide_au1xxx:        name = "au1xxx";        break;
  70                 case ide_etrax100:      name = "etrax100";      break;
  71                 case ide_acorn:         name = "acorn";         break;
  72                 default:                name = "(unknown)";     break;
  73         }
  74         len = sprintf(page, "%s\n", name);
  75         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
  76 }
  77
  78 static int proc_ide_read_mate
  79         (char *page, char **start, off_t off, int count, int *eof, void *data)
  80 {
  81         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  82         int             len;
  83
  84         if (hwif && hwif->mate && hwif->mate->present)
  85                 len = sprintf(page, "%s\n", hwif->mate->name);
  86         else
  87                 len = sprintf(page, "(none)\n");
  88         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
  89 }
  90
  91 static int proc_ide_read_channel
  92         (char *page, char **start, off_t off, int count, int *eof, void *data)
  93 {
  94         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  95         int             len;
  96
  97         page[0] = hwif->channel ? '1' : '0';
  98         page[1] = '\n';
  99         len = 2;
 100         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 101 }
 102
 103 static int proc_ide_read_identify
 104         (char *page, char **start, off_t off, int count, int *eof, void *data)
 105 {
 106         ide_drive_t     *drive = (ide_drive_t *)data;
 107         int             len = 0, i = 0;
 108         int             err = 0;
 109
 110         len = sprintf(page, "\n");
 111
 112         if (drive) {
 113                 unsigned short *val = (unsigned short *) page;
 114
 115                 err = taskfile_lib_get_identify(drive, page);
 116                 if (!err) {
 117                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
 118                         page = out;
 119                         do {
 120                                 out += sprintf(out, "%04x%c",
 121                                         le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
 122                                 val += 1;
 123                         } while (i < (SECTOR_WORDS * 2));
 124                         len = out - page;
 125                 }
 126         }
 127         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 128 }
 129
 130 /**
 131  *      __ide_add_setting       -       add an ide setting option
 132  *      @drive: drive to use
 133  *      @name: setting name
 134  *      @rw: true if the function is read write
 135  *      @data_type: type of data
 136  *      @min: range minimum
 137  *      @max: range maximum
 138  *      @mul_factor: multiplication scale
 139  *      @div_factor: divison scale
 140  *      @data: private data field
 141  *      @set: setting
 142  *      @auto_remove: setting auto removal flag
 143  *
 144  *      Removes the setting named from the device if it is present.
 145  *      The function takes the settings_lock to protect against
 146  *      parallel changes. This function must not be called from IRQ
 147  *      context. Returns 0 on success or -1 on failure.
 148  *
 149  *      BUGS: This code is seriously over-engineered. There is also
 150  *      magic about how the driver specific features are setup. If
 151  *      a driver is attached we assume the driver settings are auto
 152  *      remove.
 153  */
 154
 155 static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
 156 {
 157         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 158
 159         down(&ide_setting_sem);
 160         while ((*p) && strcmp((*p)->name, name) < 0)
 161                 p = &((*p)->next);
 162         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 163                 goto abort;
 164         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 165                 goto abort;
 166         strcpy(setting->name, name);
 167         setting->rw = rw;
 168         setting->data_type = data_type;
 169         setting->min = min;
 170         setting->max = max;
 171         setting->mul_factor = mul_factor;
 172         setting->div_factor = div_factor;
 173         setting->data = data;
 174         setting->set = set;
 175
 176         setting->next = *p;
 177         if (auto_remove)
 178                 setting->auto_remove = 1;
 179         *p = setting;
 180         up(&ide_setting_sem);
 181         return 0;
 182 abort:
 183         up(&ide_setting_sem);
 184         kfree(setting);
 185         return -1;
 186 }
 187
 188 int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
 189 {
 190         return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
 191 }
 192
 193 EXPORT_SYMBOL(ide_add_setting);
 194
 195 /**
 196  *      __ide_remove_setting    -       remove an ide setting option
 197  *      @drive: drive to use
 198  *      @name: setting name
 199  *
 200  *      Removes the setting named from the device if it is present.
 201  *      The caller must hold the setting semaphore.
 202  */
 203
 204 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 205 {
 206         ide_settings_t **p, *setting;
 207
 208         p = (ide_settings_t **) &drive->settings;
 209
 210         while ((*p) && strcmp((*p)->name, name))
 211                 p = &((*p)->next);
 212         if ((setting = (*p)) == NULL)
 213                 return;
 214
 215         (*p) = setting->next;
 216
 217         kfree(setting->name);
 218         kfree(setting);
 219 }
 220
 221 /**
 222  *      auto_remove_settings    -       remove driver specific settings
 223  *      @drive: drive
 224  *
 225  *      Automatically remove all the driver specific settings for this
 226  *      drive. This function may not be called from IRQ context. The
 227  *      caller must hold ide_setting_sem.
 228  */
 229
 230 static void auto_remove_settings (ide_drive_t *drive)
 231 {
 232         ide_settings_t *setting;
 233 repeat:
 234         setting = drive->settings;
 235         while (setting) {
 236                 if (setting->auto_remove) {
 237                         __ide_remove_setting(drive, setting->name);
 238                         goto repeat;
 239                 }
 240                 setting = setting->next;
 241         }
 242 }
 243
 244 /**
 245  *      ide_find_setting_by_name        -       find a drive specific setting
 246  *      @drive: drive to scan
 247  *      @name: setting name
 248  *
 249  *      Scan's the device setting table for a matching entry and returns
 250  *      this or NULL if no entry is found. The caller must hold the
 251  *      setting semaphore
 252  */
 253
 254 static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name)
 255 {
 256         ide_settings_t *setting = drive->settings;
 257
 258         while (setting) {
 259                 if (strcmp(setting->name, name) == 0)
 260                         break;
 261                 setting = setting->next;
 262         }
 263         return setting;
 264 }
 265
 266 /**
 267  *      ide_read_setting        -       read an IDE setting
 268  *      @drive: drive to read from
 269  *      @setting: drive setting
 270  *
 271  *      Read a drive setting and return the value. The caller
 272  *      must hold the ide_setting_sem when making this call.
 273  *
 274  *      BUGS: the data return and error are the same return value
 275  *      so an error -EINVAL and true return of the same value cannot
 276  *      be told apart
 277  */
 278
 279 static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting)
 280 {
 281         int             val = -EINVAL;
 282         unsigned long   flags;
 283
 284         if ((setting->rw & SETTING_READ)) {
 285                 spin_lock_irqsave(&ide_lock, flags);
 286                 switch(setting->data_type) {
 287                         case TYPE_BYTE:
 288                                 val = *((u8 *) setting->data);
 289                                 break;
 290                         case TYPE_SHORT:
 291                                 val = *((u16 *) setting->data);
 292                                 break;
 293                         case TYPE_INT:
 294                                 val = *((u32 *) setting->data);
 295                                 break;
 296                 }
 297                 spin_unlock_irqrestore(&ide_lock, flags);
 298         }
 299         return val;
 300 }
 301
 302 /**
 303  *      ide_write_setting       -       read an IDE setting
 304  *      @drive: drive to read from
 305  *      @setting: drive setting
 306  *      @val: value
 307  *
 308  *      Write a drive setting if it is possible. The caller
 309  *      must hold the ide_setting_sem when making this call.
 310  *
 311  *      BUGS: the data return and error are the same return value
 312  *      so an error -EINVAL and true return of the same value cannot
 313  *      be told apart
 314  *
 315  *      FIXME:  This should be changed to enqueue a special request
 316  *      to the driver to change settings, and then wait on a sema for completion.
 317  *      The current scheme of polling is kludgy, though safe enough.
 318  */
 319
 320 static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val)
 321 {
 322         if (!capable(CAP_SYS_ADMIN))
 323                 return -EACCES;
 324         if (setting->set)
 325                 return setting->set(drive, val);
 326         if (!(setting->rw & SETTING_WRITE))
 327                 return -EPERM;
 328         if (val < setting->min || val > setting->max)
 329                 return -EINVAL;
 330         if (ide_spin_wait_hwgroup(drive))
 331                 return -EBUSY;
 332         switch (setting->data_type) {
 333                 case TYPE_BYTE:
 334                         *((u8 *) setting->data) = val;
 335                         break;
 336                 case TYPE_SHORT:
 337                         *((u16 *) setting->data) = val;
 338                         break;
 339                 case TYPE_INT:
 340                         *((u32 *) setting->data) = val;
 341                         break;
 342         }
 343         spin_unlock_irq(&ide_lock);
 344         return 0;
 345 }
 346
 347 static int set_xfer_rate (ide_drive_t *drive, int arg)
 348 {
 349         int err;
 350
 351         if (arg < 0 || arg > 70)
 352                 return -EINVAL;
 353
 354         err = ide_wait_cmd(drive,
 355                         WIN_SETFEATURES, (u8) arg,
 356                         SETFEATURES_XFER, 0, NULL);
 357
 358         if (!err && arg) {
 359                 ide_set_xfer_rate(drive, (u8) arg);
 360                 ide_driveid_update(drive);
 361         }
 362         return err;
 363 }
 364
 365 /**
 366  *      ide_add_generic_settings        -       generic ide settings
 367  *      @drive: drive being configured
 368  *
 369  *      Add the generic parts of the system settings to the /proc files.
 370  *      The caller must not be holding the ide_setting_sem.
 371  */
 372
 373 void ide_add_generic_settings (ide_drive_t *drive)
 374 {
 375 /*
 376  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
 377  */
 378         __ide_add_setting(drive,        "io_32bit",             drive->no_io_32bit ? SETTING_READ : SETTING_RW, TYPE_BYTE,      0,      1 + (SUPPORT_VLB_SYNC << 1),    1,              1,              &drive->io_32bit,               set_io_32bit,   0);
 379         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
 380         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
 381         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
 382         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
 383         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
 384         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
 385         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
 386         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
 387 }
 388
 389 static void proc_ide_settings_warn(void)
 390 {
 391         static int warned = 0;
 392
 393         if (warned)
 394                 return;
 395
 396         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 397                             "obsolete, and will be removed soon!\n");
 398         warned = 1;
 399 }
 400
 401 static int proc_ide_read_settings
 402         (char *page, char **start, off_t off, int count, int *eof, void *data)
 403 {
 404         ide_drive_t     *drive = (ide_drive_t *) data;
 405         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
 406         char            *out = page;
 407         int             len, rc, mul_factor, div_factor;
 408
 409         proc_ide_settings_warn();
 410
 411         down(&ide_setting_sem);
 412         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 413         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 414         while(setting) {
 415                 mul_factor = setting->mul_factor;
 416                 div_factor = setting->div_factor;
 417                 out += sprintf(out, "%-24s", setting->name);
 418                 if ((rc = ide_read_setting(drive, setting)) >= 0)
 419                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 420                 else
 421                         out += sprintf(out, "%-16s", "write-only");
 422                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 423                 if (setting->rw & SETTING_READ)
 424                         out += sprintf(out, "r");
 425                 if (setting->rw & SETTING_WRITE)
 426                         out += sprintf(out, "w");
 427                 out += sprintf(out, "\n");
 428                 setting = setting->next;
 429         }
 430         len = out - page;
 431         up(&ide_setting_sem);
 432         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 433 }
 434
 435 #define MAX_LEN 30
 436
 437 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 438                                    unsigned long count, void *data)
 439 {
 440         ide_drive_t     *drive = (ide_drive_t *) data;
 441         char            name[MAX_LEN + 1];
 442         int             for_real = 0;
 443         unsigned long   n;
 444         ide_settings_t  *setting;
 445         char *buf, *s;
 446
 447         if (!capable(CAP_SYS_ADMIN))
 448                 return -EACCES;
 449
 450         proc_ide_settings_warn();
 451
 452         if (count >= PAGE_SIZE)
 453                 return -EINVAL;
 454
 455         s = buf = (char *)__get_free_page(GFP_USER);
 456         if (!buf)
 457                 return -ENOMEM;
 458
 459         if (copy_from_user(buf, buffer, count)) {
 460                 free_page((unsigned long)buf);
 461                 return -EFAULT;
 462         }
 463
 464         buf[count] = '\0';
 465
 466         /*
 467          * Skip over leading whitespace
 468          */
 469         while (count && isspace(*s)) {
 470                 --count;
 471                 ++s;
 472         }
 473         /*
 474          * Do one full pass to verify all parameters,
 475          * then do another to actually write the new settings.
 476          */
 477         do {
 478                 char *p = s;
 479                 n = count;
 480                 while (n > 0) {
 481                         unsigned val;
 482                         char *q = p;
 483
 484                         while (n > 0 && *p != ':') {
 485                                 --n;
 486                                 p++;
 487                         }
 488                         if (*p != ':')
 489                                 goto parse_error;
 490                         if (p - q > MAX_LEN)
 491                                 goto parse_error;
 492                         memcpy(name, q, p - q);
 493                         name[p - q] = 0;
 494
 495                         if (n > 0) {
 496                                 --n;
 497                                 p++;
 498                         } else
 499                                 goto parse_error;
 500
 501                         val = simple_strtoul(p, &q, 10);
 502                         n -= q - p;
 503                         p = q;
 504                         if (n > 0 && !isspace(*p))
 505                                 goto parse_error;
 506                         while (n > 0 && isspace(*p)) {
 507                                 --n;
 508                                 ++p;
 509                         }
 510
 511                         down(&ide_setting_sem);
 512                         setting = ide_find_setting_by_name(drive, name);
 513                         if (!setting)
 514                         {
 515                                 up(&ide_setting_sem);
 516                                 goto parse_error;
 517                         }
 518                         if (for_real)
 519                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
 520                         up(&ide_setting_sem);
 521                 }
 522         } while (!for_real++);
 523         free_page((unsigned long)buf);
 524         return count;
 525 parse_error:
 526         free_page((unsigned long)buf);
 527         printk("proc_ide_write_settings(): parse error\n");
 528         return -EINVAL;
 529 }
 530
 531 int proc_ide_read_capacity
 532         (char *page, char **start, off_t off, int count, int *eof, void *data)
 533 {
 534         int len = sprintf(page,"%llu\n", (long long)0x7fffffff);
 535         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 536 }
 537
 538 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 539
 540 int proc_ide_read_geometry
 541         (char *page, char **start, off_t off, int count, int *eof, void *data)
 542 {
 543         ide_drive_t     *drive = (ide_drive_t *) data;
 544         char            *out = page;
 545         int             len;
 546
 547         out += sprintf(out,"physical     %d/%d/%d\n",
 548                         drive->cyl, drive->head, drive->sect);
 549         out += sprintf(out,"logical      %d/%d/%d\n",
 550                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 551
 552         len = out - page;
 553         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 554 }
 555
 556 EXPORT_SYMBOL(proc_ide_read_geometry);
 557
 558 static int proc_ide_read_dmodel
 559         (char *page, char **start, off_t off, int count, int *eof, void *data)
 560 {
 561         ide_drive_t     *drive = (ide_drive_t *) data;
 562         struct hd_driveid *id = drive->id;
 563         int             len;
 564
 565         len = sprintf(page, "%.40s\n",
 566                 (id && id->model[0]) ? (char *)id->model : "(none)");
 567         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 568 }
 569
 570 static int proc_ide_read_driver
 571         (char *page, char **start, off_t off, int count, int *eof, void *data)
 572 {
 573         ide_drive_t     *drive = (ide_drive_t *) data;
 574         struct device   *dev = &drive->gendev;
 575         ide_driver_t    *ide_drv;
 576         int             len;
 577
 578         if (dev->driver) {
 579                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 580                 len = sprintf(page, "%s version %s\n",
 581                                 dev->driver->name, ide_drv->version);
 582         } else
 583                 len = sprintf(page, "ide-default version 0.9.newide\n");
 584         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 585 }
 586
 587 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 588 {
 589         struct device *dev = &drive->gendev;
 590         int ret = 1;
 591         int err;
 592
 593         device_release_driver(dev);
 594         /* FIXME: device can still be in use by previous driver */
 595         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 596         err = device_attach(dev);
 597         if (err < 0)
 598                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 599                         __FUNCTION__, err);
 600         drive->driver_req[0] = 0;
 601         if (dev->driver == NULL) {
 602                 err = device_attach(dev);
 603                 if (err < 0)
 604                         printk(KERN_WARNING
 605                                 "IDE: %s: device_attach(2) error: %d\n",
 606                                 __FUNCTION__, err);
 607         }
 608         if (dev->driver && !strcmp(dev->driver->name, driver))
 609                 ret = 0;
 610
 611         return ret;
 612 }
 613
 614 static int proc_ide_write_driver
 615         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 616 {
 617         ide_drive_t     *drive = (ide_drive_t *) data;
 618         char name[32];
 619
 620         if (!capable(CAP_SYS_ADMIN))
 621                 return -EACCES;
 622         if (count > 31)
 623                 count = 31;
 624         if (copy_from_user(name, buffer, count))
 625                 return -EFAULT;
 626         name[count] = '\0';
 627         if (ide_replace_subdriver(drive, name))
 628                 return -EINVAL;
 629         return count;
 630 }
 631
 632 static int proc_ide_read_media
 633         (char *page, char **start, off_t off, int count, int *eof, void *data)
 634 {
 635         ide_drive_t     *drive = (ide_drive_t *) data;
 636         const char      *media;
 637         int             len;
 638
 639         switch (drive->media) {
 640                 case ide_disk:  media = "disk\n";
 641                                 break;
 642                 case ide_cdrom: media = "cdrom\n";
 643                                 break;
 644                 case ide_tape:  media = "tape\n";
 645                                 break;
 646                 case ide_floppy:media = "floppy\n";
 647                                 break;
 648                 case ide_optical:media = "optical\n";
 649                                 break;
 650                 default:        media = "UNKNOWN\n";
 651                                 break;
 652         }
 653         strcpy(page,media);
 654         len = strlen(media);
 655         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 656 }
 657
 658 static ide_proc_entry_t generic_drive_entries[] = {
 659         { "driver",     S_IFREG|S_IRUGO,        proc_ide_read_driver,   proc_ide_write_driver },
 660         { "identify",   S_IFREG|S_IRUSR,        proc_ide_read_identify, NULL },
 661         { "media",      S_IFREG|S_IRUGO,        proc_ide_read_media,    NULL },
 662         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_dmodel,   NULL },
 663         { "settings",   S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings },
 664         { NULL, 0, NULL, NULL }
 665 };
 666
 667 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 668 {
 669         struct proc_dir_entry *ent;
 670
 671         if (!dir || !p)
 672                 return;
 673         while (p->name != NULL) {
 674                 ent = create_proc_entry(p->name, p->mode, dir);
 675                 if (!ent) return;
 676                 ent->data = data;
 677                 ent->read_proc = p->read_proc;
 678                 ent->write_proc = p->write_proc;
 679                 p++;
 680         }
 681 }
 682
 683 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 684 {
 685         if (!dir || !p)
 686                 return;
 687         while (p->name != NULL) {
 688                 remove_proc_entry(p->name, dir);
 689                 p++;
 690         }
 691 }
 692
 693 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 694 {
 695         ide_add_proc_entries(drive->proc, driver->proc, drive);
 696 }
 697
 698 EXPORT_SYMBOL(ide_proc_register_driver);
 699
 700 /**
 701  *      ide_proc_unregister_driver      -       remove driver specific data
 702  *      @drive: drive
 703  *      @driver: driver
 704  *
 705  *      Clean up the driver specific /proc files and IDE settings
 706  *      for a given drive.
 707  *
 708  *      Takes ide_setting_sem and ide_lock.
 709  *      Caller must hold none of the locks.
 710  */
 711
 712 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 713 {
 714         unsigned long flags;
 715
 716         ide_remove_proc_entries(drive->proc, driver->proc);
 717
 718         down(&ide_setting_sem);
 719         spin_lock_irqsave(&ide_lock, flags);
 720         /*
 721          * ide_setting_sem protects the settings list
 722          * ide_lock protects the use of settings
 723          *
 724          * so we need to hold both, ide_settings_sem because we want to
 725          * modify the settings list, and ide_lock because we cannot take
 726          * a setting out that is being used.
 727          *
 728          * OTOH both ide_{read,write}_setting are only ever used under
 729          * ide_setting_sem.
 730          */
 731         auto_remove_settings(drive);
 732         spin_unlock_irqrestore(&ide_lock, flags);
 733         up(&ide_setting_sem);
 734 }
 735
 736 EXPORT_SYMBOL(ide_proc_unregister_driver);
 737
 738 static void create_proc_ide_drives(ide_hwif_t *hwif)
 739 {
 740         int     d;
 741         struct proc_dir_entry *ent;
 742         struct proc_dir_entry *parent = hwif->proc;
 743         char name[64];
 744
 745         for (d = 0; d < MAX_DRIVES; d++) {
 746                 ide_drive_t *drive = &hwif->drives[d];
 747
 748                 if (!drive->present)
 749                         continue;
 750                 if (drive->proc)
 751                         continue;
 752
 753                 drive->proc = proc_mkdir(drive->name, parent);
 754                 if (drive->proc)
 755                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 756                 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 757                 ent = proc_symlink(drive->name, proc_ide_root, name);
 758                 if (!ent) return;
 759         }
 760 }
 761
 762 static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
 763 {
 764         if (drive->proc) {
 765                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 766                 remove_proc_entry(drive->name, proc_ide_root);
 767                 remove_proc_entry(drive->name, hwif->proc);
 768                 drive->proc = NULL;
 769         }
 770 }
 771
 772 static void destroy_proc_ide_drives(ide_hwif_t *hwif)
 773 {
 774         int     d;
 775
 776         for (d = 0; d < MAX_DRIVES; d++) {
 777                 ide_drive_t *drive = &hwif->drives[d];
 778                 if (drive->proc)
 779                         destroy_proc_ide_device(hwif, drive);
 780         }
 781 }
 782
 783 static ide_proc_entry_t hwif_entries[] = {
 784         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 785         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 786         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 787         { NULL, 0, NULL, NULL }
 788 };
 789
 790 void ide_proc_register_port(ide_hwif_t *hwif)
 791 {
 792         if (!hwif->present)
 793                 return;
 794
 795         if (!hwif->proc) {
 796                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 797
 798                 if (!hwif->proc)
 799                         return;
 800
 801                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 802         }
 803
 804         create_proc_ide_drives(hwif);
 805 }
 806
 807 EXPORT_SYMBOL_GPL(ide_proc_register_port);
 808
 809 #ifdef CONFIG_BLK_DEV_IDEPCI
 810 void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
 811 {
 812         create_proc_info_entry(name, 0, proc_ide_root, get_info);
 813 }
 814
 815 EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
 816 #endif
 817
 818 void ide_proc_unregister_port(ide_hwif_t *hwif)
 819 {
 820         if (hwif->proc) {
 821                 destroy_proc_ide_drives(hwif);
 822                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 823                 remove_proc_entry(hwif->name, proc_ide_root);
 824                 hwif->proc = NULL;
 825         }
 826 }
 827
 828 static int proc_print_driver(struct device_driver *drv, void *data)
 829 {
 830         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
 831         struct seq_file *s = data;
 832
 833         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 834
 835         return 0;
 836 }
 837
 838 static int ide_drivers_show(struct seq_file *s, void *p)
 839 {
 840         int err;
 841
 842         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 843         if (err < 0)
 844                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 845                         __FUNCTION__, err);
 846         return 0;
 847 }
 848
 849 static int ide_drivers_open(struct inode *inode, struct file *file)
 850 {
 851         return single_open(file, &ide_drivers_show, NULL);
 852 }
 853
 854 static const struct file_operations ide_drivers_operations = {
 855         .open           = ide_drivers_open,
 856         .read           = seq_read,
 857         .llseek         = seq_lseek,
 858         .release        = single_release,
 859 };
 860
 861 void proc_ide_create(void)
 862 {
 863         struct proc_dir_entry *entry;
 864
 865         proc_ide_root = proc_mkdir("ide", NULL);
 866
 867         if (!proc_ide_root)
 868                 return;
 869
 870         entry = create_proc_entry("drivers", 0, proc_ide_root);
 871         if (entry)
 872                 entry->proc_fops = &ide_drivers_operations;
 873 }
 874
 875 void proc_ide_destroy(void)
 876 {
 877         remove_proc_entry("drivers", proc_ide_root);
 878         remove_proc_entry("ide", NULL);
 879 }