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