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  * Also useful, "cat /proc/ide0/hda/[identify, smart_values,
  17  * smart_thresholds, capabilities]" will issue an IDENTIFY /
  18  * PACKET_IDENTIFY / SMART_READ_VALUES / SMART_READ_THRESHOLDS /
  19  * SENSE CAPABILITIES command to /dev/hda, and then dump out the
  20  * returned data as 256 16-bit words.  The "hdparm" utility will
  21  * be updated someday soon to use this mechanism.
  22  *
  23  */
  24
  25 #include <linux/module.h>
  26
  27 #include <asm/uaccess.h>
  28 #include <linux/errno.h>
  29 #include <linux/proc_fs.h>
  30 #include <linux/stat.h>
  31 #include <linux/mm.h>
  32 #include <linux/pci.h>
  33 #include <linux/ctype.h>
  34 #include <linux/hdreg.h>
  35 #include <linux/ide.h>
  36 #include <linux/seq_file.h>
  37
  38 #include <asm/io.h>
  39
  40 static struct proc_dir_entry *proc_ide_root;
  41
  42 static int proc_ide_read_imodel
  43         (char *page, char **start, off_t off, int count, int *eof, void *data)
  44 {
  45         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  46         int             len;
  47         const char      *name;
  48
  49         /*
  50          * Neither ide_unknown nor ide_forced should be set at this point.
  51          */
  52         switch (hwif->chipset) {
  53                 case ide_generic:       name = "generic";       break;
  54                 case ide_pci:           name = "pci";           break;
  55                 case ide_cmd640:        name = "cmd640";        break;
  56                 case ide_dtc2278:       name = "dtc2278";       break;
  57                 case ide_ali14xx:       name = "ali14xx";       break;
  58                 case ide_qd65xx:        name = "qd65xx";        break;
  59                 case ide_umc8672:       name = "umc8672";       break;
  60                 case ide_ht6560b:       name = "ht6560b";       break;
  61                 case ide_rz1000:        name = "rz1000";        break;
  62                 case ide_trm290:        name = "trm290";        break;
  63                 case ide_cmd646:        name = "cmd646";        break;
  64                 case ide_cy82c693:      name = "cy82c693";      break;
  65                 case ide_4drives:       name = "4drives";       break;
  66                 case ide_pmac:          name = "mac-io";        break;
  67                 case ide_au1xxx:        name = "au1xxx";        break;
  68                 case ide_etrax100:      name = "etrax100";      break;
  69                 case ide_acorn:         name = "acorn";         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         mutex_lock(&ide_setting_mtx);
 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         mutex_unlock(&ide_setting_mtx);
 179         return 0;
 180 abort:
 181         mutex_unlock(&ide_setting_mtx);
 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_mtx.
 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_mtx 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_mtx 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         ide_task_t task;
 348         int err;
 349
 350         if (arg < 0 || arg > 70)
 351                 return -EINVAL;
 352
 353         memset(&task, 0, sizeof(task));
 354         task.tf.command = WIN_SETFEATURES;
 355         task.tf.feature = SETFEATURES_XFER;
 356         task.tf.nsect   = (u8)arg;
 357         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
 358                         IDE_TFLAG_IN_NSECT;
 359
 360         err = ide_no_data_taskfile(drive, &task);
 361
 362         if (!err && arg) {
 363                 ide_set_xfer_rate(drive, (u8) arg);
 364                 ide_driveid_update(drive);
 365         }
 366         return err;
 367 }
 368
 369 /**
 370  *      ide_add_generic_settings        -       generic ide settings
 371  *      @drive: drive being configured
 372  *
 373  *      Add the generic parts of the system settings to the /proc files.
 374  *      The caller must not be holding the ide_setting_mtx.
 375  */
 376
 377 void ide_add_generic_settings (ide_drive_t *drive)
 378 {
 379 /*
 380  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
 381  */
 382         __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);
 383         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
 384         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
 385         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
 386         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
 387         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
 388         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
 389         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
 390         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
 391 }
 392
 393 static void proc_ide_settings_warn(void)
 394 {
 395         static int warned = 0;
 396
 397         if (warned)
 398                 return;
 399
 400         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 401                             "obsolete, and will be removed soon!\n");
 402         warned = 1;
 403 }
 404
 405 static int proc_ide_read_settings
 406         (char *page, char **start, off_t off, int count, int *eof, void *data)
 407 {
 408         ide_drive_t     *drive = (ide_drive_t *) data;
 409         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
 410         char            *out = page;
 411         int             len, rc, mul_factor, div_factor;
 412
 413         proc_ide_settings_warn();
 414
 415         mutex_lock(&ide_setting_mtx);
 416         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 417         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 418         while(setting) {
 419                 mul_factor = setting->mul_factor;
 420                 div_factor = setting->div_factor;
 421                 out += sprintf(out, "%-24s", setting->name);
 422                 if ((rc = ide_read_setting(drive, setting)) >= 0)
 423                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 424                 else
 425                         out += sprintf(out, "%-16s", "write-only");
 426                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 427                 if (setting->rw & SETTING_READ)
 428                         out += sprintf(out, "r");
 429                 if (setting->rw & SETTING_WRITE)
 430                         out += sprintf(out, "w");
 431                 out += sprintf(out, "\n");
 432                 setting = setting->next;
 433         }
 434         len = out - page;
 435         mutex_unlock(&ide_setting_mtx);
 436         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 437 }
 438
 439 #define MAX_LEN 30
 440
 441 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 442                                    unsigned long count, void *data)
 443 {
 444         ide_drive_t     *drive = (ide_drive_t *) data;
 445         char            name[MAX_LEN + 1];
 446         int             for_real = 0;
 447         unsigned long   n;
 448         ide_settings_t  *setting;
 449         char *buf, *s;
 450
 451         if (!capable(CAP_SYS_ADMIN))
 452                 return -EACCES;
 453
 454         proc_ide_settings_warn();
 455
 456         if (count >= PAGE_SIZE)
 457                 return -EINVAL;
 458
 459         s = buf = (char *)__get_free_page(GFP_USER);
 460         if (!buf)
 461                 return -ENOMEM;
 462
 463         if (copy_from_user(buf, buffer, count)) {
 464                 free_page((unsigned long)buf);
 465                 return -EFAULT;
 466         }
 467
 468         buf[count] = '\0';
 469
 470         /*
 471          * Skip over leading whitespace
 472          */
 473         while (count && isspace(*s)) {
 474                 --count;
 475                 ++s;
 476         }
 477         /*
 478          * Do one full pass to verify all parameters,
 479          * then do another to actually write the new settings.
 480          */
 481         do {
 482                 char *p = s;
 483                 n = count;
 484                 while (n > 0) {
 485                         unsigned val;
 486                         char *q = p;
 487
 488                         while (n > 0 && *p != ':') {
 489                                 --n;
 490                                 p++;
 491                         }
 492                         if (*p != ':')
 493                                 goto parse_error;
 494                         if (p - q > MAX_LEN)
 495                                 goto parse_error;
 496                         memcpy(name, q, p - q);
 497                         name[p - q] = 0;
 498
 499                         if (n > 0) {
 500                                 --n;
 501                                 p++;
 502                         } else
 503                                 goto parse_error;
 504
 505                         val = simple_strtoul(p, &q, 10);
 506                         n -= q - p;
 507                         p = q;
 508                         if (n > 0 && !isspace(*p))
 509                                 goto parse_error;
 510                         while (n > 0 && isspace(*p)) {
 511                                 --n;
 512                                 ++p;
 513                         }
 514
 515                         mutex_lock(&ide_setting_mtx);
 516                         setting = ide_find_setting_by_name(drive, name);
 517                         if (!setting)
 518                         {
 519                                 mutex_unlock(&ide_setting_mtx);
 520                                 goto parse_error;
 521                         }
 522                         if (for_real)
 523                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
 524                         mutex_unlock(&ide_setting_mtx);
 525                 }
 526         } while (!for_real++);
 527         free_page((unsigned long)buf);
 528         return count;
 529 parse_error:
 530         free_page((unsigned long)buf);
 531         printk("proc_ide_write_settings(): parse error\n");
 532         return -EINVAL;
 533 }
 534
 535 int proc_ide_read_capacity
 536         (char *page, char **start, off_t off, int count, int *eof, void *data)
 537 {
 538         int len = sprintf(page,"%llu\n", (long long)0x7fffffff);
 539         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 540 }
 541
 542 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 543
 544 int proc_ide_read_geometry
 545         (char *page, char **start, off_t off, int count, int *eof, void *data)
 546 {
 547         ide_drive_t     *drive = (ide_drive_t *) data;
 548         char            *out = page;
 549         int             len;
 550
 551         out += sprintf(out,"physical     %d/%d/%d\n",
 552                         drive->cyl, drive->head, drive->sect);
 553         out += sprintf(out,"logical      %d/%d/%d\n",
 554                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 555
 556         len = out - page;
 557         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 558 }
 559
 560 EXPORT_SYMBOL(proc_ide_read_geometry);
 561
 562 static int proc_ide_read_dmodel
 563         (char *page, char **start, off_t off, int count, int *eof, void *data)
 564 {
 565         ide_drive_t     *drive = (ide_drive_t *) data;
 566         struct hd_driveid *id = drive->id;
 567         int             len;
 568
 569         len = sprintf(page, "%.40s\n",
 570                 (id && id->model[0]) ? (char *)id->model : "(none)");
 571         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 572 }
 573
 574 static int proc_ide_read_driver
 575         (char *page, char **start, off_t off, int count, int *eof, void *data)
 576 {
 577         ide_drive_t     *drive = (ide_drive_t *) data;
 578         struct device   *dev = &drive->gendev;
 579         ide_driver_t    *ide_drv;
 580         int             len;
 581
 582         if (dev->driver) {
 583                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 584                 len = sprintf(page, "%s version %s\n",
 585                                 dev->driver->name, ide_drv->version);
 586         } else
 587                 len = sprintf(page, "ide-default version 0.9.newide\n");
 588         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 589 }
 590
 591 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 592 {
 593         struct device *dev = &drive->gendev;
 594         int ret = 1;
 595         int err;
 596
 597         device_release_driver(dev);
 598         /* FIXME: device can still be in use by previous driver */
 599         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 600         err = device_attach(dev);
 601         if (err < 0)
 602                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 603                         __FUNCTION__, err);
 604         drive->driver_req[0] = 0;
 605         if (dev->driver == NULL) {
 606                 err = device_attach(dev);
 607                 if (err < 0)
 608                         printk(KERN_WARNING
 609                                 "IDE: %s: device_attach(2) error: %d\n",
 610                                 __FUNCTION__, err);
 611         }
 612         if (dev->driver && !strcmp(dev->driver->name, driver))
 613                 ret = 0;
 614
 615         return ret;
 616 }
 617
 618 static int proc_ide_write_driver
 619         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 620 {
 621         ide_drive_t     *drive = (ide_drive_t *) data;
 622         char name[32];
 623
 624         if (!capable(CAP_SYS_ADMIN))
 625                 return -EACCES;
 626         if (count > 31)
 627                 count = 31;
 628         if (copy_from_user(name, buffer, count))
 629                 return -EFAULT;
 630         name[count] = '\0';
 631         if (ide_replace_subdriver(drive, name))
 632                 return -EINVAL;
 633         return count;
 634 }
 635
 636 static int proc_ide_read_media
 637         (char *page, char **start, off_t off, int count, int *eof, void *data)
 638 {
 639         ide_drive_t     *drive = (ide_drive_t *) data;
 640         const char      *media;
 641         int             len;
 642
 643         switch (drive->media) {
 644                 case ide_disk:  media = "disk\n";
 645                                 break;
 646                 case ide_cdrom: media = "cdrom\n";
 647                                 break;
 648                 case ide_tape:  media = "tape\n";
 649                                 break;
 650                 case ide_floppy:media = "floppy\n";
 651                                 break;
 652                 case ide_optical:media = "optical\n";
 653                                 break;
 654                 default:        media = "UNKNOWN\n";
 655                                 break;
 656         }
 657         strcpy(page,media);
 658         len = strlen(media);
 659         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 660 }
 661
 662 static ide_proc_entry_t generic_drive_entries[] = {
 663         { "driver",     S_IFREG|S_IRUGO,        proc_ide_read_driver,   proc_ide_write_driver },
 664         { "identify",   S_IFREG|S_IRUSR,        proc_ide_read_identify, NULL },
 665         { "media",      S_IFREG|S_IRUGO,        proc_ide_read_media,    NULL },
 666         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_dmodel,   NULL },
 667         { "settings",   S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings },
 668         { NULL, 0, NULL, NULL }
 669 };
 670
 671 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 672 {
 673         struct proc_dir_entry *ent;
 674
 675         if (!dir || !p)
 676                 return;
 677         while (p->name != NULL) {
 678                 ent = create_proc_entry(p->name, p->mode, dir);
 679                 if (!ent) return;
 680                 ent->data = data;
 681                 ent->read_proc = p->read_proc;
 682                 ent->write_proc = p->write_proc;
 683                 p++;
 684         }
 685 }
 686
 687 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 688 {
 689         if (!dir || !p)
 690                 return;
 691         while (p->name != NULL) {
 692                 remove_proc_entry(p->name, dir);
 693                 p++;
 694         }
 695 }
 696
 697 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 698 {
 699         ide_add_proc_entries(drive->proc, driver->proc, drive);
 700 }
 701
 702 EXPORT_SYMBOL(ide_proc_register_driver);
 703
 704 /**
 705  *      ide_proc_unregister_driver      -       remove driver specific data
 706  *      @drive: drive
 707  *      @driver: driver
 708  *
 709  *      Clean up the driver specific /proc files and IDE settings
 710  *      for a given drive.
 711  *
 712  *      Takes ide_setting_mtx and ide_lock.
 713  *      Caller must hold none of the locks.
 714  */
 715
 716 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 717 {
 718         unsigned long flags;
 719
 720         ide_remove_proc_entries(drive->proc, driver->proc);
 721
 722         mutex_lock(&ide_setting_mtx);
 723         spin_lock_irqsave(&ide_lock, flags);
 724         /*
 725          * ide_setting_mtx protects the settings list
 726          * ide_lock protects the use of settings
 727          *
 728          * so we need to hold both, ide_settings_sem because we want to
 729          * modify the settings list, and ide_lock because we cannot take
 730          * a setting out that is being used.
 731          *
 732          * OTOH both ide_{read,write}_setting are only ever used under
 733          * ide_setting_mtx.
 734          */
 735         auto_remove_settings(drive);
 736         spin_unlock_irqrestore(&ide_lock, flags);
 737         mutex_unlock(&ide_setting_mtx);
 738 }
 739
 740 EXPORT_SYMBOL(ide_proc_unregister_driver);
 741
 742 static void create_proc_ide_drives(ide_hwif_t *hwif)
 743 {
 744         int     d;
 745         struct proc_dir_entry *ent;
 746         struct proc_dir_entry *parent = hwif->proc;
 747         char name[64];
 748
 749         for (d = 0; d < MAX_DRIVES; d++) {
 750                 ide_drive_t *drive = &hwif->drives[d];
 751
 752                 if (!drive->present)
 753                         continue;
 754                 if (drive->proc)
 755                         continue;
 756
 757                 drive->proc = proc_mkdir(drive->name, parent);
 758                 if (drive->proc)
 759                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 760                 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 761                 ent = proc_symlink(drive->name, proc_ide_root, name);
 762                 if (!ent) return;
 763         }
 764 }
 765
 766 static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
 767 {
 768         if (drive->proc) {
 769                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 770                 remove_proc_entry(drive->name, proc_ide_root);
 771                 remove_proc_entry(drive->name, hwif->proc);
 772                 drive->proc = NULL;
 773         }
 774 }
 775
 776 static void destroy_proc_ide_drives(ide_hwif_t *hwif)
 777 {
 778         int     d;
 779
 780         for (d = 0; d < MAX_DRIVES; d++) {
 781                 ide_drive_t *drive = &hwif->drives[d];
 782                 if (drive->proc)
 783                         destroy_proc_ide_device(hwif, drive);
 784         }
 785 }
 786
 787 static ide_proc_entry_t hwif_entries[] = {
 788         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 789         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 790         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 791         { NULL, 0, NULL, NULL }
 792 };
 793
 794 void ide_proc_register_port(ide_hwif_t *hwif)
 795 {
 796         if (!hwif->proc) {
 797                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 798
 799                 if (!hwif->proc)
 800                         return;
 801
 802                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 803         }
 804
 805         create_proc_ide_drives(hwif);
 806 }
 807
 808 #ifdef CONFIG_BLK_DEV_IDEPCI
 809 void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
 810 {
 811         create_proc_info_entry(name, 0, proc_ide_root, get_info);
 812 }
 813
 814 EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
 815 #endif
 816
 817 void ide_proc_unregister_port(ide_hwif_t *hwif)
 818 {
 819         if (hwif->proc) {
 820                 destroy_proc_ide_drives(hwif);
 821                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 822                 remove_proc_entry(hwif->name, proc_ide_root);
 823                 hwif->proc = NULL;
 824         }
 825 }
 826
 827 static int proc_print_driver(struct device_driver *drv, void *data)
 828 {
 829         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
 830         struct seq_file *s = data;
 831
 832         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 833
 834         return 0;
 835 }
 836
 837 static int ide_drivers_show(struct seq_file *s, void *p)
 838 {
 839         int err;
 840
 841         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 842         if (err < 0)
 843                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 844                         __FUNCTION__, err);
 845         return 0;
 846 }
 847
 848 static int ide_drivers_open(struct inode *inode, struct file *file)
 849 {
 850         return single_open(file, &ide_drivers_show, NULL);
 851 }
 852
 853 static const struct file_operations ide_drivers_operations = {
 854         .open           = ide_drivers_open,
 855         .read           = seq_read,
 856         .llseek         = seq_lseek,
 857         .release        = single_release,
 858 };
 859
 860 void proc_ide_create(void)
 861 {
 862         struct proc_dir_entry *entry;
 863
 864         proc_ide_root = proc_mkdir("ide", NULL);
 865
 866         if (!proc_ide_root)
 867                 return;
 868
 869         entry = create_proc_entry("drivers", 0, proc_ide_root);
 870         if (entry)
 871                 entry->proc_fops = &ide_drivers_operations;
 872 }
 873
 874 void proc_ide_destroy(void)
 875 {
 876         remove_proc_entry("drivers", proc_ide_root);
 877         remove_proc_entry("ide", NULL);
 878 }