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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         mutex_lock(&ide_setting_mtx);
 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         mutex_unlock(&ide_setting_mtx);
 181         return 0;
 182 abort:
 183         mutex_unlock(&ide_setting_mtx);
 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_mtx.
 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_mtx 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_mtx 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         ide_task_t task;
 350         int err;
 351
 352         if (arg < 0 || arg > 70)
 353                 return -EINVAL;
 354
 355         memset(&task, 0, sizeof(task));
 356         task.tf.command = WIN_SETFEATURES;
 357         task.tf.feature = SETFEATURES_XFER;
 358         task.tf.nsect   = (u8)arg;
 359         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
 360                         IDE_TFLAG_IN_NSECT;
 361
 362         err = ide_no_data_taskfile(drive, &task);
 363
 364         if (!err && arg) {
 365                 ide_set_xfer_rate(drive, (u8) arg);
 366                 ide_driveid_update(drive);
 367         }
 368         return err;
 369 }
 370
 371 /**
 372  *      ide_add_generic_settings        -       generic ide settings
 373  *      @drive: drive being configured
 374  *
 375  *      Add the generic parts of the system settings to the /proc files.
 376  *      The caller must not be holding the ide_setting_mtx.
 377  */
 378
 379 void ide_add_generic_settings (ide_drive_t *drive)
 380 {
 381 /*
 382  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
 383  */
 384         __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);
 385         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
 386         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
 387         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
 388         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
 389         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
 390         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
 391         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
 392         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
 393 }
 394
 395 static void proc_ide_settings_warn(void)
 396 {
 397         static int warned = 0;
 398
 399         if (warned)
 400                 return;
 401
 402         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 403                             "obsolete, and will be removed soon!\n");
 404         warned = 1;
 405 }
 406
 407 static int proc_ide_read_settings
 408         (char *page, char **start, off_t off, int count, int *eof, void *data)
 409 {
 410         ide_drive_t     *drive = (ide_drive_t *) data;
 411         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
 412         char            *out = page;
 413         int             len, rc, mul_factor, div_factor;
 414
 415         proc_ide_settings_warn();
 416
 417         mutex_lock(&ide_setting_mtx);
 418         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 419         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 420         while(setting) {
 421                 mul_factor = setting->mul_factor;
 422                 div_factor = setting->div_factor;
 423                 out += sprintf(out, "%-24s", setting->name);
 424                 if ((rc = ide_read_setting(drive, setting)) >= 0)
 425                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 426                 else
 427                         out += sprintf(out, "%-16s", "write-only");
 428                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 429                 if (setting->rw & SETTING_READ)
 430                         out += sprintf(out, "r");
 431                 if (setting->rw & SETTING_WRITE)
 432                         out += sprintf(out, "w");
 433                 out += sprintf(out, "\n");
 434                 setting = setting->next;
 435         }
 436         len = out - page;
 437         mutex_unlock(&ide_setting_mtx);
 438         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 439 }
 440
 441 #define MAX_LEN 30
 442
 443 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 444                                    unsigned long count, void *data)
 445 {
 446         ide_drive_t     *drive = (ide_drive_t *) data;
 447         char            name[MAX_LEN + 1];
 448         int             for_real = 0;
 449         unsigned long   n;
 450         ide_settings_t  *setting;
 451         char *buf, *s;
 452
 453         if (!capable(CAP_SYS_ADMIN))
 454                 return -EACCES;
 455
 456         proc_ide_settings_warn();
 457
 458         if (count >= PAGE_SIZE)
 459                 return -EINVAL;
 460
 461         s = buf = (char *)__get_free_page(GFP_USER);
 462         if (!buf)
 463                 return -ENOMEM;
 464
 465         if (copy_from_user(buf, buffer, count)) {
 466                 free_page((unsigned long)buf);
 467                 return -EFAULT;
 468         }
 469
 470         buf[count] = '\0';
 471
 472         /*
 473          * Skip over leading whitespace
 474          */
 475         while (count && isspace(*s)) {
 476                 --count;
 477                 ++s;
 478         }
 479         /*
 480          * Do one full pass to verify all parameters,
 481          * then do another to actually write the new settings.
 482          */
 483         do {
 484                 char *p = s;
 485                 n = count;
 486                 while (n > 0) {
 487                         unsigned val;
 488                         char *q = p;
 489
 490                         while (n > 0 && *p != ':') {
 491                                 --n;
 492                                 p++;
 493                         }
 494                         if (*p != ':')
 495                                 goto parse_error;
 496                         if (p - q > MAX_LEN)
 497                                 goto parse_error;
 498                         memcpy(name, q, p - q);
 499                         name[p - q] = 0;
 500
 501                         if (n > 0) {
 502                                 --n;
 503                                 p++;
 504                         } else
 505                                 goto parse_error;
 506
 507                         val = simple_strtoul(p, &q, 10);
 508                         n -= q - p;
 509                         p = q;
 510                         if (n > 0 && !isspace(*p))
 511                                 goto parse_error;
 512                         while (n > 0 && isspace(*p)) {
 513                                 --n;
 514                                 ++p;
 515                         }
 516
 517                         mutex_lock(&ide_setting_mtx);
 518                         setting = ide_find_setting_by_name(drive, name);
 519                         if (!setting)
 520                         {
 521                                 mutex_unlock(&ide_setting_mtx);
 522                                 goto parse_error;
 523                         }
 524                         if (for_real)
 525                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
 526                         mutex_unlock(&ide_setting_mtx);
 527                 }
 528         } while (!for_real++);
 529         free_page((unsigned long)buf);
 530         return count;
 531 parse_error:
 532         free_page((unsigned long)buf);
 533         printk("proc_ide_write_settings(): parse error\n");
 534         return -EINVAL;
 535 }
 536
 537 int proc_ide_read_capacity
 538         (char *page, char **start, off_t off, int count, int *eof, void *data)
 539 {
 540         int len = sprintf(page,"%llu\n", (long long)0x7fffffff);
 541         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 542 }
 543
 544 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 545
 546 int proc_ide_read_geometry
 547         (char *page, char **start, off_t off, int count, int *eof, void *data)
 548 {
 549         ide_drive_t     *drive = (ide_drive_t *) data;
 550         char            *out = page;
 551         int             len;
 552
 553         out += sprintf(out,"physical     %d/%d/%d\n",
 554                         drive->cyl, drive->head, drive->sect);
 555         out += sprintf(out,"logical      %d/%d/%d\n",
 556                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 557
 558         len = out - page;
 559         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 560 }
 561
 562 EXPORT_SYMBOL(proc_ide_read_geometry);
 563
 564 static int proc_ide_read_dmodel
 565         (char *page, char **start, off_t off, int count, int *eof, void *data)
 566 {
 567         ide_drive_t     *drive = (ide_drive_t *) data;
 568         struct hd_driveid *id = drive->id;
 569         int             len;
 570
 571         len = sprintf(page, "%.40s\n",
 572                 (id && id->model[0]) ? (char *)id->model : "(none)");
 573         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 574 }
 575
 576 static int proc_ide_read_driver
 577         (char *page, char **start, off_t off, int count, int *eof, void *data)
 578 {
 579         ide_drive_t     *drive = (ide_drive_t *) data;
 580         struct device   *dev = &drive->gendev;
 581         ide_driver_t    *ide_drv;
 582         int             len;
 583
 584         if (dev->driver) {
 585                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 586                 len = sprintf(page, "%s version %s\n",
 587                                 dev->driver->name, ide_drv->version);
 588         } else
 589                 len = sprintf(page, "ide-default version 0.9.newide\n");
 590         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 591 }
 592
 593 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 594 {
 595         struct device *dev = &drive->gendev;
 596         int ret = 1;
 597         int err;
 598
 599         device_release_driver(dev);
 600         /* FIXME: device can still be in use by previous driver */
 601         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 602         err = device_attach(dev);
 603         if (err < 0)
 604                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 605                         __FUNCTION__, err);
 606         drive->driver_req[0] = 0;
 607         if (dev->driver == NULL) {
 608                 err = device_attach(dev);
 609                 if (err < 0)
 610                         printk(KERN_WARNING
 611                                 "IDE: %s: device_attach(2) error: %d\n",
 612                                 __FUNCTION__, err);
 613         }
 614         if (dev->driver && !strcmp(dev->driver->name, driver))
 615                 ret = 0;
 616
 617         return ret;
 618 }
 619
 620 static int proc_ide_write_driver
 621         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 622 {
 623         ide_drive_t     *drive = (ide_drive_t *) data;
 624         char name[32];
 625
 626         if (!capable(CAP_SYS_ADMIN))
 627                 return -EACCES;
 628         if (count > 31)
 629                 count = 31;
 630         if (copy_from_user(name, buffer, count))
 631                 return -EFAULT;
 632         name[count] = '\0';
 633         if (ide_replace_subdriver(drive, name))
 634                 return -EINVAL;
 635         return count;
 636 }
 637
 638 static int proc_ide_read_media
 639         (char *page, char **start, off_t off, int count, int *eof, void *data)
 640 {
 641         ide_drive_t     *drive = (ide_drive_t *) data;
 642         const char      *media;
 643         int             len;
 644
 645         switch (drive->media) {
 646                 case ide_disk:  media = "disk\n";
 647                                 break;
 648                 case ide_cdrom: media = "cdrom\n";
 649                                 break;
 650                 case ide_tape:  media = "tape\n";
 651                                 break;
 652                 case ide_floppy:media = "floppy\n";
 653                                 break;
 654                 case ide_optical:media = "optical\n";
 655                                 break;
 656                 default:        media = "UNKNOWN\n";
 657                                 break;
 658         }
 659         strcpy(page,media);
 660         len = strlen(media);
 661         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 662 }
 663
 664 static ide_proc_entry_t generic_drive_entries[] = {
 665         { "driver",     S_IFREG|S_IRUGO,        proc_ide_read_driver,   proc_ide_write_driver },
 666         { "identify",   S_IFREG|S_IRUSR,        proc_ide_read_identify, NULL },
 667         { "media",      S_IFREG|S_IRUGO,        proc_ide_read_media,    NULL },
 668         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_dmodel,   NULL },
 669         { "settings",   S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings },
 670         { NULL, 0, NULL, NULL }
 671 };
 672
 673 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 674 {
 675         struct proc_dir_entry *ent;
 676
 677         if (!dir || !p)
 678                 return;
 679         while (p->name != NULL) {
 680                 ent = create_proc_entry(p->name, p->mode, dir);
 681                 if (!ent) return;
 682                 ent->data = data;
 683                 ent->read_proc = p->read_proc;
 684                 ent->write_proc = p->write_proc;
 685                 p++;
 686         }
 687 }
 688
 689 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 690 {
 691         if (!dir || !p)
 692                 return;
 693         while (p->name != NULL) {
 694                 remove_proc_entry(p->name, dir);
 695                 p++;
 696         }
 697 }
 698
 699 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 700 {
 701         ide_add_proc_entries(drive->proc, driver->proc, drive);
 702 }
 703
 704 EXPORT_SYMBOL(ide_proc_register_driver);
 705
 706 /**
 707  *      ide_proc_unregister_driver      -       remove driver specific data
 708  *      @drive: drive
 709  *      @driver: driver
 710  *
 711  *      Clean up the driver specific /proc files and IDE settings
 712  *      for a given drive.
 713  *
 714  *      Takes ide_setting_mtx and ide_lock.
 715  *      Caller must hold none of the locks.
 716  */
 717
 718 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 719 {
 720         unsigned long flags;
 721
 722         ide_remove_proc_entries(drive->proc, driver->proc);
 723
 724         mutex_lock(&ide_setting_mtx);
 725         spin_lock_irqsave(&ide_lock, flags);
 726         /*
 727          * ide_setting_mtx protects the settings list
 728          * ide_lock protects the use of settings
 729          *
 730          * so we need to hold both, ide_settings_sem because we want to
 731          * modify the settings list, and ide_lock because we cannot take
 732          * a setting out that is being used.
 733          *
 734          * OTOH both ide_{read,write}_setting are only ever used under
 735          * ide_setting_mtx.
 736          */
 737         auto_remove_settings(drive);
 738         spin_unlock_irqrestore(&ide_lock, flags);
 739         mutex_unlock(&ide_setting_mtx);
 740 }
 741
 742 EXPORT_SYMBOL(ide_proc_unregister_driver);
 743
 744 static void create_proc_ide_drives(ide_hwif_t *hwif)
 745 {
 746         int     d;
 747         struct proc_dir_entry *ent;
 748         struct proc_dir_entry *parent = hwif->proc;
 749         char name[64];
 750
 751         for (d = 0; d < MAX_DRIVES; d++) {
 752                 ide_drive_t *drive = &hwif->drives[d];
 753
 754                 if (!drive->present)
 755                         continue;
 756                 if (drive->proc)
 757                         continue;
 758
 759                 drive->proc = proc_mkdir(drive->name, parent);
 760                 if (drive->proc)
 761                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 762                 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 763                 ent = proc_symlink(drive->name, proc_ide_root, name);
 764                 if (!ent) return;
 765         }
 766 }
 767
 768 static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
 769 {
 770         if (drive->proc) {
 771                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 772                 remove_proc_entry(drive->name, proc_ide_root);
 773                 remove_proc_entry(drive->name, hwif->proc);
 774                 drive->proc = NULL;
 775         }
 776 }
 777
 778 static void destroy_proc_ide_drives(ide_hwif_t *hwif)
 779 {
 780         int     d;
 781
 782         for (d = 0; d < MAX_DRIVES; d++) {
 783                 ide_drive_t *drive = &hwif->drives[d];
 784                 if (drive->proc)
 785                         destroy_proc_ide_device(hwif, drive);
 786         }
 787 }
 788
 789 static ide_proc_entry_t hwif_entries[] = {
 790         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 791         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 792         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 793         { NULL, 0, NULL, NULL }
 794 };
 795
 796 void ide_proc_register_port(ide_hwif_t *hwif)
 797 {
 798         if (!hwif->present)
 799                 return;
 800
 801         if (!hwif->proc) {
 802                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 803
 804                 if (!hwif->proc)
 805                         return;
 806
 807                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 808         }
 809
 810         create_proc_ide_drives(hwif);
 811 }
 812
 813 #ifdef CONFIG_BLK_DEV_IDEPCI
 814 void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
 815 {
 816         create_proc_info_entry(name, 0, proc_ide_root, get_info);
 817 }
 818
 819 EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
 820 #endif
 821
 822 void ide_proc_unregister_port(ide_hwif_t *hwif)
 823 {
 824         if (hwif->proc) {
 825                 destroy_proc_ide_drives(hwif);
 826                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 827                 remove_proc_entry(hwif->name, proc_ide_root);
 828                 hwif->proc = NULL;
 829         }
 830 }
 831
 832 static int proc_print_driver(struct device_driver *drv, void *data)
 833 {
 834         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
 835         struct seq_file *s = data;
 836
 837         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 838
 839         return 0;
 840 }
 841
 842 static int ide_drivers_show(struct seq_file *s, void *p)
 843 {
 844         int err;
 845
 846         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 847         if (err < 0)
 848                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 849                         __FUNCTION__, err);
 850         return 0;
 851 }
 852
 853 static int ide_drivers_open(struct inode *inode, struct file *file)
 854 {
 855         return single_open(file, &ide_drivers_show, NULL);
 856 }
 857
 858 static const struct file_operations ide_drivers_operations = {
 859         .open           = ide_drivers_open,
 860         .read           = seq_read,
 861         .llseek         = seq_lseek,
 862         .release        = single_release,
 863 };
 864
 865 void proc_ide_create(void)
 866 {
 867         struct proc_dir_entry *entry;
 868
 869         proc_ide_root = proc_mkdir("ide", NULL);
 870
 871         if (!proc_ide_root)
 872                 return;
 873
 874         entry = create_proc_entry("drivers", 0, proc_ide_root);
 875         if (entry)
 876                 entry->proc_fops = &ide_drivers_operations;
 877 }
 878
 879 void proc_ide_destroy(void)
 880 {
 881         remove_proc_entry("drivers", proc_ide_root);
 882         remove_proc_entry("ide", NULL);
 883 }