SAFE public projects git trees. - safe/jmp/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/hdreg.h>
  27 #include <linux/ide.h>
  28 #include <linux/seq_file.h>
  29
  30 #include <asm/io.h>
  31
  32 static struct proc_dir_entry *proc_ide_root;
  33
  34 static int proc_ide_read_imodel
  35         (char *page, char **start, off_t off, int count, int *eof, void *data)
  36 {
  37         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  38         int             len;
  39         const char      *name;
  40
  41         switch (hwif->chipset) {
  42         case ide_generic:       name = "generic";       break;
  43         case ide_pci:           name = "pci";           break;
  44         case ide_cmd640:        name = "cmd640";        break;
  45         case ide_dtc2278:       name = "dtc2278";       break;
  46         case ide_ali14xx:       name = "ali14xx";       break;
  47         case ide_qd65xx:        name = "qd65xx";        break;
  48         case ide_umc8672:       name = "umc8672";       break;
  49         case ide_ht6560b:       name = "ht6560b";       break;
  50         case ide_rz1000:        name = "rz1000";        break;
  51         case ide_trm290:        name = "trm290";        break;
  52         case ide_cmd646:        name = "cmd646";        break;
  53         case ide_cy82c693:      name = "cy82c693";      break;
  54         case ide_4drives:       name = "4drives";       break;
  55         case ide_pmac:          name = "mac-io";        break;
  56         case ide_au1xxx:        name = "au1xxx";        break;
  57         case ide_palm3710:      name = "palm3710";      break;
  58         case ide_acorn:         name = "acorn";         break;
  59         default:                name = "(unknown)";     break;
  60         }
  61         len = sprintf(page, "%s\n", name);
  62         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  63 }
  64
  65 static int proc_ide_read_mate
  66         (char *page, char **start, off_t off, int count, int *eof, void *data)
  67 {
  68         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  69         int             len;
  70
  71         if (hwif && hwif->mate)
  72                 len = sprintf(page, "%s\n", hwif->mate->name);
  73         else
  74                 len = sprintf(page, "(none)\n");
  75         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  76 }
  77
  78 static int proc_ide_read_channel
  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         page[0] = hwif->channel ? '1' : '0';
  85         page[1] = '\n';
  86         len = 2;
  87         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  88 }
  89
  90 static int proc_ide_read_identify
  91         (char *page, char **start, off_t off, int count, int *eof, void *data)
  92 {
  93         ide_drive_t     *drive = (ide_drive_t *)data;
  94         int             len = 0, i = 0;
  95         int             err = 0;
  96
  97         len = sprintf(page, "\n");
  98
  99         if (drive) {
 100                 __le16 *val = (__le16 *)page;
 101
 102                 err = taskfile_lib_get_identify(drive, page);
 103                 if (!err) {
 104                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
 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_WORDS * 2));
 111                         len = out - page;
 112                 }
 113         }
 114         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 115 }
 116
 117 /**
 118  *      __ide_add_setting       -       add an ide setting option
 119  *      @drive: drive to use
 120  *      @name: setting name
 121  *      @rw: true if the function is read write
 122  *      @data_type: type of data
 123  *      @min: range minimum
 124  *      @max: range maximum
 125  *      @mul_factor: multiplication scale
 126  *      @div_factor: divison scale
 127  *      @data: private data field
 128  *      @set: setting
 129  *      @auto_remove: setting auto removal flag
 130  *
 131  *      Removes the setting named from the device if it is present.
 132  *      The function takes the settings_lock to protect against
 133  *      parallel changes. This function must not be called from IRQ
 134  *      context. Returns 0 on success or -1 on failure.
 135  *
 136  *      BUGS: This code is seriously over-engineered. There is also
 137  *      magic about how the driver specific features are setup. If
 138  *      a driver is attached we assume the driver settings are auto
 139  *      remove.
 140  */
 141
 142 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)
 143 {
 144         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 145
 146         mutex_lock(&ide_setting_mtx);
 147         while ((*p) && strcmp((*p)->name, name) < 0)
 148                 p = &((*p)->next);
 149         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 150                 goto abort;
 151         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 152                 goto abort;
 153         strcpy(setting->name, name);
 154         setting->rw = rw;
 155         setting->data_type = data_type;
 156         setting->min = min;
 157         setting->max = max;
 158         setting->mul_factor = mul_factor;
 159         setting->div_factor = div_factor;
 160         setting->data = data;
 161         setting->set = set;
 162
 163         setting->next = *p;
 164         if (auto_remove)
 165                 setting->auto_remove = 1;
 166         *p = setting;
 167         mutex_unlock(&ide_setting_mtx);
 168         return 0;
 169 abort:
 170         mutex_unlock(&ide_setting_mtx);
 171         kfree(setting);
 172         return -1;
 173 }
 174
 175 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)
 176 {
 177         return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
 178 }
 179
 180 EXPORT_SYMBOL(ide_add_setting);
 181
 182 /**
 183  *      __ide_remove_setting    -       remove an ide setting option
 184  *      @drive: drive to use
 185  *      @name: setting name
 186  *
 187  *      Removes the setting named from the device if it is present.
 188  *      The caller must hold the setting semaphore.
 189  */
 190
 191 static void __ide_remove_setting(ide_drive_t *drive, char *name)
 192 {
 193         ide_settings_t **p, *setting;
 194
 195         p = (ide_settings_t **) &drive->settings;
 196
 197         while ((*p) && strcmp((*p)->name, name))
 198                 p = &((*p)->next);
 199         setting = (*p);
 200         if (setting == NULL)
 201                 return;
 202
 203         (*p) = setting->next;
 204
 205         kfree(setting->name);
 206         kfree(setting);
 207 }
 208
 209 /**
 210  *      auto_remove_settings    -       remove driver specific settings
 211  *      @drive: drive
 212  *
 213  *      Automatically remove all the driver specific settings for this
 214  *      drive. This function may not be called from IRQ context. The
 215  *      caller must hold ide_setting_mtx.
 216  */
 217
 218 static void auto_remove_settings(ide_drive_t *drive)
 219 {
 220         ide_settings_t *setting;
 221 repeat:
 222         setting = drive->settings;
 223         while (setting) {
 224                 if (setting->auto_remove) {
 225                         __ide_remove_setting(drive, setting->name);
 226                         goto repeat;
 227                 }
 228                 setting = setting->next;
 229         }
 230 }
 231
 232 /**
 233  *      ide_find_setting_by_name        -       find a drive specific setting
 234  *      @drive: drive to scan
 235  *      @name: setting name
 236  *
 237  *      Scan's the device setting table for a matching entry and returns
 238  *      this or NULL if no entry is found. The caller must hold the
 239  *      setting semaphore
 240  */
 241
 242 static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name)
 243 {
 244         ide_settings_t *setting = drive->settings;
 245
 246         while (setting) {
 247                 if (strcmp(setting->name, name) == 0)
 248                         break;
 249                 setting = setting->next;
 250         }
 251         return setting;
 252 }
 253
 254 /**
 255  *      ide_read_setting        -       read an IDE setting
 256  *      @drive: drive to read from
 257  *      @setting: drive setting
 258  *
 259  *      Read a drive setting and return the value. The caller
 260  *      must hold the ide_setting_mtx when making this call.
 261  *
 262  *      BUGS: the data return and error are the same return value
 263  *      so an error -EINVAL and true return of the same value cannot
 264  *      be told apart
 265  */
 266
 267 static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting)
 268 {
 269         int             val = -EINVAL;
 270         unsigned long   flags;
 271
 272         if ((setting->rw & SETTING_READ)) {
 273                 spin_lock_irqsave(&ide_lock, flags);
 274                 switch (setting->data_type) {
 275                 case TYPE_BYTE:
 276                         val = *((u8 *) setting->data);
 277                         break;
 278                 case TYPE_SHORT:
 279                         val = *((u16 *) setting->data);
 280                         break;
 281                 case TYPE_INT:
 282                         val = *((u32 *) setting->data);
 283                         break;
 284                 }
 285                 spin_unlock_irqrestore(&ide_lock, flags);
 286         }
 287         return val;
 288 }
 289
 290 /**
 291  *      ide_write_setting       -       read an IDE setting
 292  *      @drive: drive to read from
 293  *      @setting: drive setting
 294  *      @val: value
 295  *
 296  *      Write a drive setting if it is possible. The caller
 297  *      must hold the ide_setting_mtx when making this call.
 298  *
 299  *      BUGS: the data return and error are the same return value
 300  *      so an error -EINVAL and true return of the same value cannot
 301  *      be told apart
 302  *
 303  *      FIXME:  This should be changed to enqueue a special request
 304  *      to the driver to change settings, and then wait on a sema for completion.
 305  *      The current scheme of polling is kludgy, though safe enough.
 306  */
 307
 308 static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val)
 309 {
 310         if (!capable(CAP_SYS_ADMIN))
 311                 return -EACCES;
 312         if (setting->set)
 313                 return setting->set(drive, val);
 314         if (!(setting->rw & SETTING_WRITE))
 315                 return -EPERM;
 316         if (val < setting->min || val > setting->max)
 317                 return -EINVAL;
 318         if (ide_spin_wait_hwgroup(drive))
 319                 return -EBUSY;
 320         switch (setting->data_type) {
 321         case TYPE_BYTE:
 322                 *((u8 *) setting->data) = val;
 323                 break;
 324         case TYPE_SHORT:
 325                 *((u16 *) setting->data) = val;
 326                 break;
 327         case TYPE_INT:
 328                 *((u32 *) setting->data) = val;
 329                 break;
 330         }
 331         spin_unlock_irq(&ide_lock);
 332         return 0;
 333 }
 334
 335 static int set_xfer_rate (ide_drive_t *drive, int arg)
 336 {
 337         ide_task_t task;
 338         int err;
 339
 340         if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
 341                 return -EINVAL;
 342
 343         memset(&task, 0, sizeof(task));
 344         task.tf.command = ATA_CMD_SET_FEATURES;
 345         task.tf.feature = SETFEATURES_XFER;
 346         task.tf.nsect   = (u8)arg;
 347         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
 348                         IDE_TFLAG_IN_NSECT;
 349
 350         err = ide_no_data_taskfile(drive, &task);
 351
 352         if (!err) {
 353                 ide_set_xfer_rate(drive, (u8) arg);
 354                 ide_driveid_update(drive);
 355         }
 356         return err;
 357 }
 358
 359 /**
 360  *      ide_add_generic_settings        -       generic ide settings
 361  *      @drive: drive being configured
 362  *
 363  *      Add the generic parts of the system settings to the /proc files.
 364  *      The caller must not be holding the ide_setting_mtx.
 365  */
 366
 367 void ide_add_generic_settings (ide_drive_t *drive)
 368 {
 369 /*
 370  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
 371  */
 372         __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);
 373         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
 374         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
 375         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
 376         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
 377         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
 378         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
 379         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
 380         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
 381 }
 382
 383 static void proc_ide_settings_warn(void)
 384 {
 385         static int warned;
 386
 387         if (warned)
 388                 return;
 389
 390         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 391                             "obsolete, and will be removed soon!\n");
 392         warned = 1;
 393 }
 394
 395 static int proc_ide_read_settings
 396         (char *page, char **start, off_t off, int count, int *eof, void *data)
 397 {
 398         ide_drive_t     *drive = (ide_drive_t *) data;
 399         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
 400         char            *out = page;
 401         int             len, rc, mul_factor, div_factor;
 402
 403         proc_ide_settings_warn();
 404
 405         mutex_lock(&ide_setting_mtx);
 406         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 407         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 408         while (setting) {
 409                 mul_factor = setting->mul_factor;
 410                 div_factor = setting->div_factor;
 411                 out += sprintf(out, "%-24s", setting->name);
 412                 rc = ide_read_setting(drive, setting);
 413                 if (rc >= 0)
 414                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 415                 else
 416                         out += sprintf(out, "%-16s", "write-only");
 417                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 418                 if (setting->rw & SETTING_READ)
 419                         out += sprintf(out, "r");
 420                 if (setting->rw & SETTING_WRITE)
 421                         out += sprintf(out, "w");
 422                 out += sprintf(out, "\n");
 423                 setting = setting->next;
 424         }
 425         len = out - page;
 426         mutex_unlock(&ide_setting_mtx);
 427         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 428 }
 429
 430 #define MAX_LEN 30
 431
 432 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 433                                    unsigned long count, void *data)
 434 {
 435         ide_drive_t     *drive = (ide_drive_t *) data;
 436         char            name[MAX_LEN + 1];
 437         int             for_real = 0;
 438         unsigned long   n;
 439         ide_settings_t  *setting;
 440         char *buf, *s;
 441
 442         if (!capable(CAP_SYS_ADMIN))
 443                 return -EACCES;
 444
 445         proc_ide_settings_warn();
 446
 447         if (count >= PAGE_SIZE)
 448                 return -EINVAL;
 449
 450         s = buf = (char *)__get_free_page(GFP_USER);
 451         if (!buf)
 452                 return -ENOMEM;
 453
 454         if (copy_from_user(buf, buffer, count)) {
 455                 free_page((unsigned long)buf);
 456                 return -EFAULT;
 457         }
 458
 459         buf[count] = '\0';
 460
 461         /*
 462          * Skip over leading whitespace
 463          */
 464         while (count && isspace(*s)) {
 465                 --count;
 466                 ++s;
 467         }
 468         /*
 469          * Do one full pass to verify all parameters,
 470          * then do another to actually write the new settings.
 471          */
 472         do {
 473                 char *p = s;
 474                 n = count;
 475                 while (n > 0) {
 476                         unsigned val;
 477                         char *q = p;
 478
 479                         while (n > 0 && *p != ':') {
 480                                 --n;
 481                                 p++;
 482                         }
 483                         if (*p != ':')
 484                                 goto parse_error;
 485                         if (p - q > MAX_LEN)
 486                                 goto parse_error;
 487                         memcpy(name, q, p - q);
 488                         name[p - q] = 0;
 489
 490                         if (n > 0) {
 491                                 --n;
 492                                 p++;
 493                         } else
 494                                 goto parse_error;
 495
 496                         val = simple_strtoul(p, &q, 10);
 497                         n -= q - p;
 498                         p = q;
 499                         if (n > 0 && !isspace(*p))
 500                                 goto parse_error;
 501                         while (n > 0 && isspace(*p)) {
 502                                 --n;
 503                                 ++p;
 504                         }
 505
 506                         mutex_lock(&ide_setting_mtx);
 507                         setting = ide_find_setting_by_name(drive, name);
 508                         if (!setting) {
 509                                 mutex_unlock(&ide_setting_mtx);
 510                                 goto parse_error;
 511                         }
 512                         if (for_real)
 513                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
 514                         mutex_unlock(&ide_setting_mtx);
 515                 }
 516         } while (!for_real++);
 517         free_page((unsigned long)buf);
 518         return count;
 519 parse_error:
 520         free_page((unsigned long)buf);
 521         printk("proc_ide_write_settings(): parse error\n");
 522         return -EINVAL;
 523 }
 524
 525 int proc_ide_read_capacity
 526         (char *page, char **start, off_t off, int count, int *eof, void *data)
 527 {
 528         int len = sprintf(page, "%llu\n", (long long)0x7fffffff);
 529         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 530 }
 531
 532 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 533
 534 int proc_ide_read_geometry
 535         (char *page, char **start, off_t off, int count, int *eof, void *data)
 536 {
 537         ide_drive_t     *drive = (ide_drive_t *) data;
 538         char            *out = page;
 539         int             len;
 540
 541         out += sprintf(out, "physical     %d/%d/%d\n",
 542                         drive->cyl, drive->head, drive->sect);
 543         out += sprintf(out, "logical      %d/%d/%d\n",
 544                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 545
 546         len = out - page;
 547         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 548 }
 549
 550 EXPORT_SYMBOL(proc_ide_read_geometry);
 551
 552 static int proc_ide_read_dmodel
 553         (char *page, char **start, off_t off, int count, int *eof, void *data)
 554 {
 555         ide_drive_t     *drive = (ide_drive_t *) data;
 556         char            *m = (char *)&drive->id[ATA_ID_PROD];
 557         int             len;
 558
 559         len = sprintf(page, "%.40s\n", m[0] ? m : "(none)");
 560         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 561 }
 562
 563 static int proc_ide_read_driver
 564         (char *page, char **start, off_t off, int count, int *eof, void *data)
 565 {
 566         ide_drive_t     *drive = (ide_drive_t *) data;
 567         struct device   *dev = &drive->gendev;
 568         ide_driver_t    *ide_drv;
 569         int             len;
 570
 571         if (dev->driver) {
 572                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 573                 len = sprintf(page, "%s version %s\n",
 574                                 dev->driver->name, ide_drv->version);
 575         } else
 576                 len = sprintf(page, "ide-default version 0.9.newide\n");
 577         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 578 }
 579
 580 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 581 {
 582         struct device *dev = &drive->gendev;
 583         int ret = 1;
 584         int err;
 585
 586         device_release_driver(dev);
 587         /* FIXME: device can still be in use by previous driver */
 588         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 589         err = device_attach(dev);
 590         if (err < 0)
 591                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 592                         __func__, err);
 593         drive->driver_req[0] = 0;
 594         if (dev->driver == NULL) {
 595                 err = device_attach(dev);
 596                 if (err < 0)
 597                         printk(KERN_WARNING
 598                                 "IDE: %s: device_attach(2) error: %d\n",
 599                                 __func__, err);
 600         }
 601         if (dev->driver && !strcmp(dev->driver->name, driver))
 602                 ret = 0;
 603
 604         return ret;
 605 }
 606
 607 static int proc_ide_write_driver
 608         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 609 {
 610         ide_drive_t     *drive = (ide_drive_t *) data;
 611         char name[32];
 612
 613         if (!capable(CAP_SYS_ADMIN))
 614                 return -EACCES;
 615         if (count > 31)
 616                 count = 31;
 617         if (copy_from_user(name, buffer, count))
 618                 return -EFAULT;
 619         name[count] = '\0';
 620         if (ide_replace_subdriver(drive, name))
 621                 return -EINVAL;
 622         return count;
 623 }
 624
 625 static int proc_ide_read_media
 626         (char *page, char **start, off_t off, int count, int *eof, void *data)
 627 {
 628         ide_drive_t     *drive = (ide_drive_t *) data;
 629         const char      *media;
 630         int             len;
 631
 632         switch (drive->media) {
 633         case ide_disk:          media = "disk\n";       break;
 634         case ide_cdrom:         media = "cdrom\n";      break;
 635         case ide_tape:          media = "tape\n";       break;
 636         case ide_floppy:        media = "floppy\n";     break;
 637         case ide_optical:       media = "optical\n";    break;
 638         default:                media = "UNKNOWN\n";    break;
 639         }
 640         strcpy(page, media);
 641         len = strlen(media);
 642         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 643 }
 644
 645 static ide_proc_entry_t generic_drive_entries[] = {
 646         { "driver",     S_IFREG|S_IRUGO,         proc_ide_read_driver,
 647                                                  proc_ide_write_driver },
 648         { "identify",   S_IFREG|S_IRUSR,         proc_ide_read_identify, NULL },
 649         { "media",      S_IFREG|S_IRUGO,         proc_ide_read_media,    NULL },
 650         { "model",      S_IFREG|S_IRUGO,         proc_ide_read_dmodel,   NULL },
 651         { "settings",   S_IFREG|S_IRUSR|S_IWUSR, proc_ide_read_settings,
 652                                                  proc_ide_write_settings },
 653         { NULL, 0, NULL, NULL }
 654 };
 655
 656 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 657 {
 658         struct proc_dir_entry *ent;
 659
 660         if (!dir || !p)
 661                 return;
 662         while (p->name != NULL) {
 663                 ent = create_proc_entry(p->name, p->mode, dir);
 664                 if (!ent) return;
 665                 ent->data = data;
 666                 ent->read_proc = p->read_proc;
 667                 ent->write_proc = p->write_proc;
 668                 p++;
 669         }
 670 }
 671
 672 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 673 {
 674         if (!dir || !p)
 675                 return;
 676         while (p->name != NULL) {
 677                 remove_proc_entry(p->name, dir);
 678                 p++;
 679         }
 680 }
 681
 682 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 683 {
 684         ide_add_proc_entries(drive->proc, driver->proc, drive);
 685 }
 686
 687 EXPORT_SYMBOL(ide_proc_register_driver);
 688
 689 /**
 690  *      ide_proc_unregister_driver      -       remove driver specific data
 691  *      @drive: drive
 692  *      @driver: driver
 693  *
 694  *      Clean up the driver specific /proc files and IDE settings
 695  *      for a given drive.
 696  *
 697  *      Takes ide_setting_mtx and ide_lock.
 698  *      Caller must hold none of the locks.
 699  */
 700
 701 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 702 {
 703         unsigned long flags;
 704
 705         ide_remove_proc_entries(drive->proc, driver->proc);
 706
 707         mutex_lock(&ide_setting_mtx);
 708         spin_lock_irqsave(&ide_lock, flags);
 709         /*
 710          * ide_setting_mtx protects the settings list
 711          * ide_lock protects the use of settings
 712          *
 713          * so we need to hold both, ide_settings_sem because we want to
 714          * modify the settings list, and ide_lock because we cannot take
 715          * a setting out that is being used.
 716          *
 717          * OTOH both ide_{read,write}_setting are only ever used under
 718          * ide_setting_mtx.
 719          */
 720         auto_remove_settings(drive);
 721         spin_unlock_irqrestore(&ide_lock, flags);
 722         mutex_unlock(&ide_setting_mtx);
 723 }
 724 EXPORT_SYMBOL(ide_proc_unregister_driver);
 725
 726 void ide_proc_port_register_devices(ide_hwif_t *hwif)
 727 {
 728         int     d;
 729         struct proc_dir_entry *ent;
 730         struct proc_dir_entry *parent = hwif->proc;
 731         char name[64];
 732
 733         for (d = 0; d < MAX_DRIVES; d++) {
 734                 ide_drive_t *drive = &hwif->drives[d];
 735
 736                 if (!drive->present)
 737                         continue;
 738                 if (drive->proc)
 739                         continue;
 740
 741                 drive->proc = proc_mkdir(drive->name, parent);
 742                 if (drive->proc)
 743                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 744                 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 745                 ent = proc_symlink(drive->name, proc_ide_root, name);
 746                 if (!ent) return;
 747         }
 748 }
 749
 750 void ide_proc_unregister_device(ide_drive_t *drive)
 751 {
 752         if (drive->proc) {
 753                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 754                 remove_proc_entry(drive->name, proc_ide_root);
 755                 remove_proc_entry(drive->name, drive->hwif->proc);
 756                 drive->proc = NULL;
 757         }
 758 }
 759
 760 static ide_proc_entry_t hwif_entries[] = {
 761         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 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 ide_proc_register_port(ide_hwif_t *hwif)
 768 {
 769         if (!hwif->proc) {
 770                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 771
 772                 if (!hwif->proc)
 773                         return;
 774
 775                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 776         }
 777 }
 778
 779 void ide_proc_unregister_port(ide_hwif_t *hwif)
 780 {
 781         if (hwif->proc) {
 782                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 783                 remove_proc_entry(hwif->name, proc_ide_root);
 784                 hwif->proc = NULL;
 785         }
 786 }
 787
 788 static int proc_print_driver(struct device_driver *drv, void *data)
 789 {
 790         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
 791         struct seq_file *s = data;
 792
 793         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 794
 795         return 0;
 796 }
 797
 798 static int ide_drivers_show(struct seq_file *s, void *p)
 799 {
 800         int err;
 801
 802         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 803         if (err < 0)
 804                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 805                         __func__, err);
 806         return 0;
 807 }
 808
 809 static int ide_drivers_open(struct inode *inode, struct file *file)
 810 {
 811         return single_open(file, &ide_drivers_show, NULL);
 812 }
 813
 814 static const struct file_operations ide_drivers_operations = {
 815         .owner          = THIS_MODULE,
 816         .open           = ide_drivers_open,
 817         .read           = seq_read,
 818         .llseek         = seq_lseek,
 819         .release        = single_release,
 820 };
 821
 822 void proc_ide_create(void)
 823 {
 824         proc_ide_root = proc_mkdir("ide", NULL);
 825
 826         if (!proc_ide_root)
 827                 return;
 828
 829         proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
 830 }
 831
 832 void proc_ide_destroy(void)
 833 {
 834         remove_proc_entry("drivers", proc_ide_root);
 835         remove_proc_entry("ide", NULL);
 836 }