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_palm3710:      name = "palm3710";      break;
  69                 case ide_etrax100:      name = "etrax100";      break;
  70                 case ide_acorn:         name = "acorn";         break;
  71                 default:                name = "(unknown)";     break;
  72         }
  73         len = sprintf(page, "%s\n", name);
  74         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
  75 }
  76
  77 static int proc_ide_read_mate
  78         (char *page, char **start, off_t off, int count, int *eof, void *data)
  79 {
  80         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  81         int             len;
  82
  83         if (hwif && hwif->mate && hwif->mate->present)
  84                 len = sprintf(page, "%s\n", hwif->mate->name);
  85         else
  86                 len = sprintf(page, "(none)\n");
  87         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
  88 }
  89
  90 static int proc_ide_read_channel
  91         (char *page, char **start, off_t off, int count, int *eof, void *data)
  92 {
  93         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  94         int             len;
  95
  96         page[0] = hwif->channel ? '1' : '0';
  97         page[1] = '\n';
  98         len = 2;
  99         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 100 }
 101
 102 static int proc_ide_read_identify
 103         (char *page, char **start, off_t off, int count, int *eof, void *data)
 104 {
 105         ide_drive_t     *drive = (ide_drive_t *)data;
 106         int             len = 0, i = 0;
 107         int             err = 0;
 108
 109         len = sprintf(page, "\n");
 110
 111         if (drive) {
 112                 unsigned short *val = (unsigned short *) page;
 113
 114                 err = taskfile_lib_get_identify(drive, page);
 115                 if (!err) {
 116                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
 117                         page = out;
 118                         do {
 119                                 out += sprintf(out, "%04x%c",
 120                                         le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
 121                                 val += 1;
 122                         } while (i < (SECTOR_WORDS * 2));
 123                         len = out - page;
 124                 }
 125         }
 126         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 127 }
 128
 129 /**
 130  *      __ide_add_setting       -       add an ide setting option
 131  *      @drive: drive to use
 132  *      @name: setting name
 133  *      @rw: true if the function is read write
 134  *      @data_type: type of data
 135  *      @min: range minimum
 136  *      @max: range maximum
 137  *      @mul_factor: multiplication scale
 138  *      @div_factor: divison scale
 139  *      @data: private data field
 140  *      @set: setting
 141  *      @auto_remove: setting auto removal flag
 142  *
 143  *      Removes the setting named from the device if it is present.
 144  *      The function takes the settings_lock to protect against
 145  *      parallel changes. This function must not be called from IRQ
 146  *      context. Returns 0 on success or -1 on failure.
 147  *
 148  *      BUGS: This code is seriously over-engineered. There is also
 149  *      magic about how the driver specific features are setup. If
 150  *      a driver is attached we assume the driver settings are auto
 151  *      remove.
 152  */
 153
 154 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)
 155 {
 156         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 157
 158         mutex_lock(&ide_setting_mtx);
 159         while ((*p) && strcmp((*p)->name, name) < 0)
 160                 p = &((*p)->next);
 161         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 162                 goto abort;
 163         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 164                 goto abort;
 165         strcpy(setting->name, name);
 166         setting->rw = rw;
 167         setting->data_type = data_type;
 168         setting->min = min;
 169         setting->max = max;
 170         setting->mul_factor = mul_factor;
 171         setting->div_factor = div_factor;
 172         setting->data = data;
 173         setting->set = set;
 174
 175         setting->next = *p;
 176         if (auto_remove)
 177                 setting->auto_remove = 1;
 178         *p = setting;
 179         mutex_unlock(&ide_setting_mtx);
 180         return 0;
 181 abort:
 182         mutex_unlock(&ide_setting_mtx);
 183         kfree(setting);
 184         return -1;
 185 }
 186
 187 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)
 188 {
 189         return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
 190 }
 191
 192 EXPORT_SYMBOL(ide_add_setting);
 193
 194 /**
 195  *      __ide_remove_setting    -       remove an ide setting option
 196  *      @drive: drive to use
 197  *      @name: setting name
 198  *
 199  *      Removes the setting named from the device if it is present.
 200  *      The caller must hold the setting semaphore.
 201  */
 202
 203 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 204 {
 205         ide_settings_t **p, *setting;
 206
 207         p = (ide_settings_t **) &drive->settings;
 208
 209         while ((*p) && strcmp((*p)->name, name))
 210                 p = &((*p)->next);
 211         if ((setting = (*p)) == NULL)
 212                 return;
 213
 214         (*p) = setting->next;
 215
 216         kfree(setting->name);
 217         kfree(setting);
 218 }
 219
 220 /**
 221  *      auto_remove_settings    -       remove driver specific settings
 222  *      @drive: drive
 223  *
 224  *      Automatically remove all the driver specific settings for this
 225  *      drive. This function may not be called from IRQ context. The
 226  *      caller must hold ide_setting_mtx.
 227  */
 228
 229 static void auto_remove_settings (ide_drive_t *drive)
 230 {
 231         ide_settings_t *setting;
 232 repeat:
 233         setting = drive->settings;
 234         while (setting) {
 235                 if (setting->auto_remove) {
 236                         __ide_remove_setting(drive, setting->name);
 237                         goto repeat;
 238                 }
 239                 setting = setting->next;
 240         }
 241 }
 242
 243 /**
 244  *      ide_find_setting_by_name        -       find a drive specific setting
 245  *      @drive: drive to scan
 246  *      @name: setting name
 247  *
 248  *      Scan's the device setting table for a matching entry and returns
 249  *      this or NULL if no entry is found. The caller must hold the
 250  *      setting semaphore
 251  */
 252
 253 static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name)
 254 {
 255         ide_settings_t *setting = drive->settings;
 256
 257         while (setting) {
 258                 if (strcmp(setting->name, name) == 0)
 259                         break;
 260                 setting = setting->next;
 261         }
 262         return setting;
 263 }
 264
 265 /**
 266  *      ide_read_setting        -       read an IDE setting
 267  *      @drive: drive to read from
 268  *      @setting: drive setting
 269  *
 270  *      Read a drive setting and return the value. The caller
 271  *      must hold the ide_setting_mtx when making this call.
 272  *
 273  *      BUGS: the data return and error are the same return value
 274  *      so an error -EINVAL and true return of the same value cannot
 275  *      be told apart
 276  */
 277
 278 static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting)
 279 {
 280         int             val = -EINVAL;
 281         unsigned long   flags;
 282
 283         if ((setting->rw & SETTING_READ)) {
 284                 spin_lock_irqsave(&ide_lock, flags);
 285                 switch(setting->data_type) {
 286                         case TYPE_BYTE:
 287                                 val = *((u8 *) setting->data);
 288                                 break;
 289                         case TYPE_SHORT:
 290                                 val = *((u16 *) setting->data);
 291                                 break;
 292                         case TYPE_INT:
 293                                 val = *((u32 *) setting->data);
 294                                 break;
 295                 }
 296                 spin_unlock_irqrestore(&ide_lock, flags);
 297         }
 298         return val;
 299 }
 300
 301 /**
 302  *      ide_write_setting       -       read an IDE setting
 303  *      @drive: drive to read from
 304  *      @setting: drive setting
 305  *      @val: value
 306  *
 307  *      Write a drive setting if it is possible. The caller
 308  *      must hold the ide_setting_mtx when making this call.
 309  *
 310  *      BUGS: the data return and error are the same return value
 311  *      so an error -EINVAL and true return of the same value cannot
 312  *      be told apart
 313  *
 314  *      FIXME:  This should be changed to enqueue a special request
 315  *      to the driver to change settings, and then wait on a sema for completion.
 316  *      The current scheme of polling is kludgy, though safe enough.
 317  */
 318
 319 static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val)
 320 {
 321         if (!capable(CAP_SYS_ADMIN))
 322                 return -EACCES;
 323         if (setting->set)
 324                 return setting->set(drive, val);
 325         if (!(setting->rw & SETTING_WRITE))
 326                 return -EPERM;
 327         if (val < setting->min || val > setting->max)
 328                 return -EINVAL;
 329         if (ide_spin_wait_hwgroup(drive))
 330                 return -EBUSY;
 331         switch (setting->data_type) {
 332                 case TYPE_BYTE:
 333                         *((u8 *) setting->data) = val;
 334                         break;
 335                 case TYPE_SHORT:
 336                         *((u16 *) setting->data) = val;
 337                         break;
 338                 case TYPE_INT:
 339                         *((u32 *) setting->data) = val;
 340                         break;
 341         }
 342         spin_unlock_irq(&ide_lock);
 343         return 0;
 344 }
 345
 346 static int set_xfer_rate (ide_drive_t *drive, int arg)
 347 {
 348         ide_task_t task;
 349         int err;
 350
 351         if (arg < 0 || arg > 70)
 352                 return -EINVAL;
 353
 354         memset(&task, 0, sizeof(task));
 355         task.tf.command = WIN_SETFEATURES;
 356         task.tf.feature = SETFEATURES_XFER;
 357         task.tf.nsect   = (u8)arg;
 358         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
 359                         IDE_TFLAG_IN_NSECT;
 360
 361         err = ide_no_data_taskfile(drive, &task);
 362
 363         if (!err && arg) {
 364                 ide_set_xfer_rate(drive, (u8) arg);
 365                 ide_driveid_update(drive);
 366         }
 367         return err;
 368 }
 369
 370 /**
 371  *      ide_add_generic_settings        -       generic ide settings
 372  *      @drive: drive being configured
 373  *
 374  *      Add the generic parts of the system settings to the /proc files.
 375  *      The caller must not be holding the ide_setting_mtx.
 376  */
 377
 378 void ide_add_generic_settings (ide_drive_t *drive)
 379 {
 380 /*
 381  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
 382  */
 383         __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);
 384         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
 385         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
 386         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
 387         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
 388         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
 389         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
 390         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
 391         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
 392 }
 393
 394 static void proc_ide_settings_warn(void)
 395 {
 396         static int warned = 0;
 397
 398         if (warned)
 399                 return;
 400
 401         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 402                             "obsolete, and will be removed soon!\n");
 403         warned = 1;
 404 }
 405
 406 static int proc_ide_read_settings
 407         (char *page, char **start, off_t off, int count, int *eof, void *data)
 408 {
 409         ide_drive_t     *drive = (ide_drive_t *) data;
 410         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
 411         char            *out = page;
 412         int             len, rc, mul_factor, div_factor;
 413
 414         proc_ide_settings_warn();
 415
 416         mutex_lock(&ide_setting_mtx);
 417         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 418         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 419         while(setting) {
 420                 mul_factor = setting->mul_factor;
 421                 div_factor = setting->div_factor;
 422                 out += sprintf(out, "%-24s", setting->name);
 423                 if ((rc = ide_read_setting(drive, setting)) >= 0)
 424                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 425                 else
 426                         out += sprintf(out, "%-16s", "write-only");
 427                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 428                 if (setting->rw & SETTING_READ)
 429                         out += sprintf(out, "r");
 430                 if (setting->rw & SETTING_WRITE)
 431                         out += sprintf(out, "w");
 432                 out += sprintf(out, "\n");
 433                 setting = setting->next;
 434         }
 435         len = out - page;
 436         mutex_unlock(&ide_setting_mtx);
 437         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 438 }
 439
 440 #define MAX_LEN 30
 441
 442 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 443                                    unsigned long count, void *data)
 444 {
 445         ide_drive_t     *drive = (ide_drive_t *) data;
 446         char            name[MAX_LEN + 1];
 447         int             for_real = 0;
 448         unsigned long   n;
 449         ide_settings_t  *setting;
 450         char *buf, *s;
 451
 452         if (!capable(CAP_SYS_ADMIN))
 453                 return -EACCES;
 454
 455         proc_ide_settings_warn();
 456
 457         if (count >= PAGE_SIZE)
 458                 return -EINVAL;
 459
 460         s = buf = (char *)__get_free_page(GFP_USER);
 461         if (!buf)
 462                 return -ENOMEM;
 463
 464         if (copy_from_user(buf, buffer, count)) {
 465                 free_page((unsigned long)buf);
 466                 return -EFAULT;
 467         }
 468
 469         buf[count] = '\0';
 470
 471         /*
 472          * Skip over leading whitespace
 473          */
 474         while (count && isspace(*s)) {
 475                 --count;
 476                 ++s;
 477         }
 478         /*
 479          * Do one full pass to verify all parameters,
 480          * then do another to actually write the new settings.
 481          */
 482         do {
 483                 char *p = s;
 484                 n = count;
 485                 while (n > 0) {
 486                         unsigned val;
 487                         char *q = p;
 488
 489                         while (n > 0 && *p != ':') {
 490                                 --n;
 491                                 p++;
 492                         }
 493                         if (*p != ':')
 494                                 goto parse_error;
 495                         if (p - q > MAX_LEN)
 496                                 goto parse_error;
 497                         memcpy(name, q, p - q);
 498                         name[p - q] = 0;
 499
 500                         if (n > 0) {
 501                                 --n;
 502                                 p++;
 503                         } else
 504                                 goto parse_error;
 505
 506                         val = simple_strtoul(p, &q, 10);
 507                         n -= q - p;
 508                         p = q;
 509                         if (n > 0 && !isspace(*p))
 510                                 goto parse_error;
 511                         while (n > 0 && isspace(*p)) {
 512                                 --n;
 513                                 ++p;
 514                         }
 515
 516                         mutex_lock(&ide_setting_mtx);
 517                         setting = ide_find_setting_by_name(drive, name);
 518                         if (!setting)
 519                         {
 520                                 mutex_unlock(&ide_setting_mtx);
 521                                 goto parse_error;
 522                         }
 523                         if (for_real)
 524                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
 525                         mutex_unlock(&ide_setting_mtx);
 526                 }
 527         } while (!for_real++);
 528         free_page((unsigned long)buf);
 529         return count;
 530 parse_error:
 531         free_page((unsigned long)buf);
 532         printk("proc_ide_write_settings(): parse error\n");
 533         return -EINVAL;
 534 }
 535
 536 int proc_ide_read_capacity
 537         (char *page, char **start, off_t off, int count, int *eof, void *data)
 538 {
 539         int len = sprintf(page,"%llu\n", (long long)0x7fffffff);
 540         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 541 }
 542
 543 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 544
 545 int proc_ide_read_geometry
 546         (char *page, char **start, off_t off, int count, int *eof, void *data)
 547 {
 548         ide_drive_t     *drive = (ide_drive_t *) data;
 549         char            *out = page;
 550         int             len;
 551
 552         out += sprintf(out,"physical     %d/%d/%d\n",
 553                         drive->cyl, drive->head, drive->sect);
 554         out += sprintf(out,"logical      %d/%d/%d\n",
 555                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 556
 557         len = out - page;
 558         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 559 }
 560
 561 EXPORT_SYMBOL(proc_ide_read_geometry);
 562
 563 static int proc_ide_read_dmodel
 564         (char *page, char **start, off_t off, int count, int *eof, void *data)
 565 {
 566         ide_drive_t     *drive = (ide_drive_t *) data;
 567         struct hd_driveid *id = drive->id;
 568         int             len;
 569
 570         len = sprintf(page, "%.40s\n",
 571                 (id && id->model[0]) ? (char *)id->model : "(none)");
 572         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 573 }
 574
 575 static int proc_ide_read_driver
 576         (char *page, char **start, off_t off, int count, int *eof, void *data)
 577 {
 578         ide_drive_t     *drive = (ide_drive_t *) data;
 579         struct device   *dev = &drive->gendev;
 580         ide_driver_t    *ide_drv;
 581         int             len;
 582
 583         if (dev->driver) {
 584                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 585                 len = sprintf(page, "%s version %s\n",
 586                                 dev->driver->name, ide_drv->version);
 587         } else
 588                 len = sprintf(page, "ide-default version 0.9.newide\n");
 589         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 590 }
 591
 592 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 593 {
 594         struct device *dev = &drive->gendev;
 595         int ret = 1;
 596         int err;
 597
 598         device_release_driver(dev);
 599         /* FIXME: device can still be in use by previous driver */
 600         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 601         err = device_attach(dev);
 602         if (err < 0)
 603                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 604                         __FUNCTION__, err);
 605         drive->driver_req[0] = 0;
 606         if (dev->driver == NULL) {
 607                 err = device_attach(dev);
 608                 if (err < 0)
 609                         printk(KERN_WARNING
 610                                 "IDE: %s: device_attach(2) error: %d\n",
 611                                 __FUNCTION__, err);
 612         }
 613         if (dev->driver && !strcmp(dev->driver->name, driver))
 614                 ret = 0;
 615
 616         return ret;
 617 }
 618
 619 static int proc_ide_write_driver
 620         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 621 {
 622         ide_drive_t     *drive = (ide_drive_t *) data;
 623         char name[32];
 624
 625         if (!capable(CAP_SYS_ADMIN))
 626                 return -EACCES;
 627         if (count > 31)
 628                 count = 31;
 629         if (copy_from_user(name, buffer, count))
 630                 return -EFAULT;
 631         name[count] = '\0';
 632         if (ide_replace_subdriver(drive, name))
 633                 return -EINVAL;
 634         return count;
 635 }
 636
 637 static int proc_ide_read_media
 638         (char *page, char **start, off_t off, int count, int *eof, void *data)
 639 {
 640         ide_drive_t     *drive = (ide_drive_t *) data;
 641         const char      *media;
 642         int             len;
 643
 644         switch (drive->media) {
 645                 case ide_disk:  media = "disk\n";
 646                                 break;
 647                 case ide_cdrom: media = "cdrom\n";
 648                                 break;
 649                 case ide_tape:  media = "tape\n";
 650                                 break;
 651                 case ide_floppy:media = "floppy\n";
 652                                 break;
 653                 case ide_optical:media = "optical\n";
 654                                 break;
 655                 default:        media = "UNKNOWN\n";
 656                                 break;
 657         }
 658         strcpy(page,media);
 659         len = strlen(media);
 660         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 661 }
 662
 663 static ide_proc_entry_t generic_drive_entries[] = {
 664         { "driver",     S_IFREG|S_IRUGO,        proc_ide_read_driver,   proc_ide_write_driver },
 665         { "identify",   S_IFREG|S_IRUSR,        proc_ide_read_identify, NULL },
 666         { "media",      S_IFREG|S_IRUGO,        proc_ide_read_media,    NULL },
 667         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_dmodel,   NULL },
 668         { "settings",   S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings },
 669         { NULL, 0, NULL, NULL }
 670 };
 671
 672 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 673 {
 674         struct proc_dir_entry *ent;
 675
 676         if (!dir || !p)
 677                 return;
 678         while (p->name != NULL) {
 679                 ent = create_proc_entry(p->name, p->mode, dir);
 680                 if (!ent) return;
 681                 ent->data = data;
 682                 ent->read_proc = p->read_proc;
 683                 ent->write_proc = p->write_proc;
 684                 p++;
 685         }
 686 }
 687
 688 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 689 {
 690         if (!dir || !p)
 691                 return;
 692         while (p->name != NULL) {
 693                 remove_proc_entry(p->name, dir);
 694                 p++;
 695         }
 696 }
 697
 698 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 699 {
 700         ide_add_proc_entries(drive->proc, driver->proc, drive);
 701 }
 702
 703 EXPORT_SYMBOL(ide_proc_register_driver);
 704
 705 /**
 706  *      ide_proc_unregister_driver      -       remove driver specific data
 707  *      @drive: drive
 708  *      @driver: driver
 709  *
 710  *      Clean up the driver specific /proc files and IDE settings
 711  *      for a given drive.
 712  *
 713  *      Takes ide_setting_mtx and ide_lock.
 714  *      Caller must hold none of the locks.
 715  */
 716
 717 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 718 {
 719         unsigned long flags;
 720
 721         ide_remove_proc_entries(drive->proc, driver->proc);
 722
 723         mutex_lock(&ide_setting_mtx);
 724         spin_lock_irqsave(&ide_lock, flags);
 725         /*
 726          * ide_setting_mtx protects the settings list
 727          * ide_lock protects the use of settings
 728          *
 729          * so we need to hold both, ide_settings_sem because we want to
 730          * modify the settings list, and ide_lock because we cannot take
 731          * a setting out that is being used.
 732          *
 733          * OTOH both ide_{read,write}_setting are only ever used under
 734          * ide_setting_mtx.
 735          */
 736         auto_remove_settings(drive);
 737         spin_unlock_irqrestore(&ide_lock, flags);
 738         mutex_unlock(&ide_setting_mtx);
 739 }
 740
 741 EXPORT_SYMBOL(ide_proc_unregister_driver);
 742
 743 void ide_proc_port_register_devices(ide_hwif_t *hwif)
 744 {
 745         int     d;
 746         struct proc_dir_entry *ent;
 747         struct proc_dir_entry *parent = hwif->proc;
 748         char name[64];
 749
 750         for (d = 0; d < MAX_DRIVES; d++) {
 751                 ide_drive_t *drive = &hwif->drives[d];
 752
 753                 if (!drive->present)
 754                         continue;
 755                 if (drive->proc)
 756                         continue;
 757
 758                 drive->proc = proc_mkdir(drive->name, parent);
 759                 if (drive->proc)
 760                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 761                 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 762                 ent = proc_symlink(drive->name, proc_ide_root, name);
 763                 if (!ent) return;
 764         }
 765 }
 766
 767 static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
 768 {
 769         if (drive->proc) {
 770                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 771                 remove_proc_entry(drive->name, proc_ide_root);
 772                 remove_proc_entry(drive->name, hwif->proc);
 773                 drive->proc = NULL;
 774         }
 775 }
 776
 777 static void destroy_proc_ide_drives(ide_hwif_t *hwif)
 778 {
 779         int     d;
 780
 781         for (d = 0; d < MAX_DRIVES; d++) {
 782                 ide_drive_t *drive = &hwif->drives[d];
 783                 if (drive->proc)
 784                         destroy_proc_ide_device(hwif, drive);
 785         }
 786 }
 787
 788 static ide_proc_entry_t hwif_entries[] = {
 789         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 790         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 791         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 792         { NULL, 0, NULL, NULL }
 793 };
 794
 795 void ide_proc_register_port(ide_hwif_t *hwif)
 796 {
 797         if (!hwif->proc) {
 798                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 799
 800                 if (!hwif->proc)
 801                         return;
 802
 803                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 804         }
 805 }
 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 }