SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/ide/ide-proc.c

   1 /*
   2  *  Copyright (C) 1997-1998     Mark Lord
   3  *  Copyright (C) 2003          Red Hat <alan@redhat.com>
   4  *
   5  *  Some code was moved here from ide.c, see it for original copyrights.
   6  */
   7
   8 /*
   9  * This is the /proc/ide/ filesystem implementation.
  10  *
  11  * Drive/Driver settings can be retrieved by reading the drive's
  12  * "settings" files.  e.g.    "cat /proc/ide0/hda/settings"
  13  * To write a new value "val" into a specific setting "name", use:
  14  *   echo "name:val" >/proc/ide/ide0/hda/settings
  15  */
  16
  17 #include <linux/module.h>
  18
  19 #include <asm/uaccess.h>
  20 #include <linux/errno.h>
  21 #include <linux/proc_fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/mm.h>
  24 #include <linux/pci.h>
  25 #include <linux/ctype.h>
  26 #include <linux/ide.h>
  27 #include <linux/seq_file.h>
  28
  29 #include <asm/io.h>
  30
  31 static struct proc_dir_entry *proc_ide_root;
  32
  33 static int proc_ide_read_imodel
  34         (char *page, char **start, off_t off, int count, int *eof, void *data)
  35 {
  36         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  37         int             len;
  38         const char      *name;
  39
  40         switch (hwif->chipset) {
  41         case ide_generic:       name = "generic";       break;
  42         case ide_pci:           name = "pci";           break;
  43         case ide_cmd640:        name = "cmd640";        break;
  44         case ide_dtc2278:       name = "dtc2278";       break;
  45         case ide_ali14xx:       name = "ali14xx";       break;
  46         case ide_qd65xx:        name = "qd65xx";        break;
  47         case ide_umc8672:       name = "umc8672";       break;
  48         case ide_ht6560b:       name = "ht6560b";       break;
  49         case ide_rz1000:        name = "rz1000";        break;
  50         case ide_trm290:        name = "trm290";        break;
  51         case ide_cmd646:        name = "cmd646";        break;
  52         case ide_cy82c693:      name = "cy82c693";      break;
  53         case ide_4drives:       name = "4drives";       break;
  54         case ide_pmac:          name = "mac-io";        break;
  55         case ide_au1xxx:        name = "au1xxx";        break;
  56         case ide_palm3710:      name = "palm3710";      break;
  57         case ide_acorn:         name = "acorn";         break;
  58         default:                name = "(unknown)";     break;
  59         }
  60         len = sprintf(page, "%s\n", name);
  61         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  62 }
  63
  64 static int proc_ide_read_mate
  65         (char *page, char **start, off_t off, int count, int *eof, void *data)
  66 {
  67         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  68         int             len;
  69
  70         if (hwif && hwif->mate)
  71                 len = sprintf(page, "%s\n", hwif->mate->name);
  72         else
  73                 len = sprintf(page, "(none)\n");
  74         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  75 }
  76
  77 static int proc_ide_read_channel
  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         page[0] = hwif->channel ? '1' : '0';
  84         page[1] = '\n';
  85         len = 2;
  86         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
  87 }
  88
  89 static int proc_ide_read_identify
  90         (char *page, char **start, off_t off, int count, int *eof, void *data)
  91 {
  92         ide_drive_t     *drive = (ide_drive_t *)data;
  93         int             len = 0, i = 0;
  94         int             err = 0;
  95
  96         len = sprintf(page, "\n");
  97
  98         if (drive) {
  99                 __le16 *val = (__le16 *)page;
 100
 101                 err = taskfile_lib_get_identify(drive, page);
 102                 if (!err) {
 103                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
 104                         page = out;
 105                         do {
 106                                 out += sprintf(out, "%04x%c",
 107                                         le16_to_cpup(val), (++i & 7) ? ' ' : '\n');
 108                                 val += 1;
 109                         } while (i < (SECTOR_WORDS * 2));
 110                         len = out - page;
 111                 }
 112         }
 113         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 114 }
 115
 116 /**
 117  *      __ide_add_setting       -       add an ide setting option
 118  *      @drive: drive to use
 119  *      @name: setting name
 120  *      @rw: true if the function is read write
 121  *      @data_type: type of data
 122  *      @min: range minimum
 123  *      @max: range maximum
 124  *      @mul_factor: multiplication scale
 125  *      @div_factor: divison scale
 126  *      @data: private data field
 127  *      @set: setting
 128  *      @auto_remove: setting auto removal flag
 129  *
 130  *      Removes the setting named from the device if it is present.
 131  *      The function takes the settings_lock to protect against
 132  *      parallel changes. This function must not be called from IRQ
 133  *      context. Returns 0 on success or -1 on failure.
 134  *
 135  *      BUGS: This code is seriously over-engineered. There is also
 136  *      magic about how the driver specific features are setup. If
 137  *      a driver is attached we assume the driver settings are auto
 138  *      remove.
 139  */
 140
 141 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)
 142 {
 143         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 144
 145         mutex_lock(&ide_setting_mtx);
 146         while ((*p) && strcmp((*p)->name, name) < 0)
 147                 p = &((*p)->next);
 148         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 149                 goto abort;
 150         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 151                 goto abort;
 152         strcpy(setting->name, name);
 153         setting->rw = rw;
 154         setting->data_type = data_type;
 155         setting->min = min;
 156         setting->max = max;
 157         setting->mul_factor = mul_factor;
 158         setting->div_factor = div_factor;
 159         setting->data = data;
 160         setting->set = set;
 161
 162         setting->next = *p;
 163         if (auto_remove)
 164                 setting->auto_remove = 1;
 165         *p = setting;
 166         mutex_unlock(&ide_setting_mtx);
 167         return 0;
 168 abort:
 169         mutex_unlock(&ide_setting_mtx);
 170         kfree(setting);
 171         return -1;
 172 }
 173
 174 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)
 175 {
 176         return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
 177 }
 178
 179 EXPORT_SYMBOL(ide_add_setting);
 180
 181 /**
 182  *      __ide_remove_setting    -       remove an ide setting option
 183  *      @drive: drive to use
 184  *      @name: setting name
 185  *
 186  *      Removes the setting named from the device if it is present.
 187  *      The caller must hold the setting semaphore.
 188  */
 189
 190 static void __ide_remove_setting(ide_drive_t *drive, char *name)
 191 {
 192         ide_settings_t **p, *setting;
 193
 194         p = (ide_settings_t **) &drive->settings;
 195
 196         while ((*p) && strcmp((*p)->name, name))
 197                 p = &((*p)->next);
 198         setting = (*p);
 199         if (setting == NULL)
 200                 return;
 201
 202         (*p) = setting->next;
 203
 204         kfree(setting->name);
 205         kfree(setting);
 206 }
 207
 208 /**
 209  *      auto_remove_settings    -       remove driver specific settings
 210  *      @drive: drive
 211  *
 212  *      Automatically remove all the driver specific settings for this
 213  *      drive. This function may not be called from IRQ context. The
 214  *      caller must hold ide_setting_mtx.
 215  */
 216
 217 static void auto_remove_settings(ide_drive_t *drive)
 218 {
 219         ide_settings_t *setting;
 220 repeat:
 221         setting = drive->settings;
 222         while (setting) {
 223                 if (setting->auto_remove) {
 224                         __ide_remove_setting(drive, setting->name);
 225                         goto repeat;
 226                 }
 227                 setting = setting->next;
 228         }
 229 }
 230
 231 /**
 232  *      ide_find_setting_by_name        -       find a drive specific setting
 233  *      @drive: drive to scan
 234  *      @name: setting name
 235  *
 236  *      Scan's the device setting table for a matching entry and returns
 237  *      this or NULL if no entry is found. The caller must hold the
 238  *      setting semaphore
 239  */
 240
 241 static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name)
 242 {
 243         ide_settings_t *setting = drive->settings;
 244
 245         while (setting) {
 246                 if (strcmp(setting->name, name) == 0)
 247                         break;
 248                 setting = setting->next;
 249         }
 250         return setting;
 251 }
 252
 253 /**
 254  *      ide_read_setting        -       read an IDE setting
 255  *      @drive: drive to read from
 256  *      @setting: drive setting
 257  *
 258  *      Read a drive setting and return the value. The caller
 259  *      must hold the ide_setting_mtx when making this call.
 260  *
 261  *      BUGS: the data return and error are the same return value
 262  *      so an error -EINVAL and true return of the same value cannot
 263  *      be told apart
 264  */
 265
 266 static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting)
 267 {
 268         int             val = -EINVAL;
 269         unsigned long   flags;
 270
 271         if ((setting->rw & SETTING_READ)) {
 272                 spin_lock_irqsave(&ide_lock, flags);
 273                 switch (setting->data_type) {
 274                 case TYPE_BYTE:
 275                         val = *((u8 *) setting->data);
 276                         break;
 277                 case TYPE_SHORT:
 278                         val = *((u16 *) setting->data);
 279                         break;
 280                 case TYPE_INT:
 281                         val = *((u32 *) setting->data);
 282                         break;
 283                 }
 284                 spin_unlock_irqrestore(&ide_lock, flags);
 285         }
 286         return val;
 287 }
 288
 289 /**
 290  *      ide_write_setting       -       read an IDE setting
 291  *      @drive: drive to read from
 292  *      @setting: drive setting
 293  *      @val: value
 294  *
 295  *      Write a drive setting if it is possible. The caller
 296  *      must hold the ide_setting_mtx when making this call.
 297  *
 298  *      BUGS: the data return and error are the same return value
 299  *      so an error -EINVAL and true return of the same value cannot
 300  *      be told apart
 301  *
 302  *      FIXME:  This should be changed to enqueue a special request
 303  *      to the driver to change settings, and then wait on a sema for completion.
 304  *      The current scheme of polling is kludgy, though safe enough.
 305  */
 306
 307 static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val)
 308 {
 309         if (!capable(CAP_SYS_ADMIN))
 310                 return -EACCES;
 311         if (setting->set)
 312                 return setting->set(drive, val);
 313         if (!(setting->rw & SETTING_WRITE))
 314                 return -EPERM;
 315         if (val < setting->min || val > setting->max)
 316                 return -EINVAL;
 317         if (ide_spin_wait_hwgroup(drive))
 318                 return -EBUSY;
 319         switch (setting->data_type) {
 320         case TYPE_BYTE:
 321                 *((u8 *) setting->data) = val;
 322                 break;
 323         case TYPE_SHORT:
 324                 *((u16 *) setting->data) = val;
 325                 break;
 326         case TYPE_INT:
 327                 *((u32 *) setting->data) = val;
 328                 break;
 329         }
 330         spin_unlock_irq(&ide_lock);
 331         return 0;
 332 }
 333
 334 static int set_xfer_rate (ide_drive_t *drive, int arg)
 335 {
 336         ide_task_t task;
 337         int err;
 338
 339         if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
 340                 return -EINVAL;
 341
 342         memset(&task, 0, sizeof(task));
 343         task.tf.command = ATA_CMD_SET_FEATURES;
 344         task.tf.feature = SETFEATURES_XFER;
 345         task.tf.nsect   = (u8)arg;
 346         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
 347                         IDE_TFLAG_IN_NSECT;
 348
 349         err = ide_no_data_taskfile(drive, &task);
 350
 351         if (!err) {
 352                 ide_set_xfer_rate(drive, (u8) arg);
 353                 ide_driveid_update(drive);
 354         }
 355         return err;
 356 }
 357
 358 /**
 359  *      ide_add_generic_settings        -       generic ide settings
 360  *      @drive: drive being configured
 361  *
 362  *      Add the generic parts of the system settings to the /proc files.
 363  *      The caller must not be holding the ide_setting_mtx.
 364  */
 365
 366 void ide_add_generic_settings (ide_drive_t *drive)
 367 {
 368 /*
 369  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
 370  */
 371         __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);
 372         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
 373         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
 374         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
 375         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
 376         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
 377         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
 378         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
 379         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
 380 }
 381
 382 static void proc_ide_settings_warn(void)
 383 {
 384         static int warned;
 385
 386         if (warned)
 387                 return;
 388
 389         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 390                             "obsolete, and will be removed soon!\n");
 391         warned = 1;
 392 }
 393
 394 static int proc_ide_read_settings
 395         (char *page, char **start, off_t off, int count, int *eof, void *data)
 396 {
 397         ide_drive_t     *drive = (ide_drive_t *) data;
 398         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
 399         char            *out = page;
 400         int             len, rc, mul_factor, div_factor;
 401
 402         proc_ide_settings_warn();
 403
 404         mutex_lock(&ide_setting_mtx);
 405         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 406         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 407         while (setting) {
 408                 mul_factor = setting->mul_factor;
 409                 div_factor = setting->div_factor;
 410                 out += sprintf(out, "%-24s", setting->name);
 411                 rc = ide_read_setting(drive, setting);
 412                 if (rc >= 0)
 413                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 414                 else
 415                         out += sprintf(out, "%-16s", "write-only");
 416                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 417                 if (setting->rw & SETTING_READ)
 418                         out += sprintf(out, "r");
 419                 if (setting->rw & SETTING_WRITE)
 420                         out += sprintf(out, "w");
 421                 out += sprintf(out, "\n");
 422                 setting = setting->next;
 423         }
 424         len = out - page;
 425         mutex_unlock(&ide_setting_mtx);
 426         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 427 }
 428
 429 #define MAX_LEN 30
 430
 431 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 432                                    unsigned long count, void *data)
 433 {
 434         ide_drive_t     *drive = (ide_drive_t *) data;
 435         char            name[MAX_LEN + 1];
 436         int             for_real = 0;
 437         unsigned long   n;
 438         ide_settings_t  *setting;
 439         char *buf, *s;
 440
 441         if (!capable(CAP_SYS_ADMIN))
 442                 return -EACCES;
 443
 444         proc_ide_settings_warn();
 445
 446         if (count >= PAGE_SIZE)
 447                 return -EINVAL;
 448
 449         s = buf = (char *)__get_free_page(GFP_USER);
 450         if (!buf)
 451                 return -ENOMEM;
 452
 453         if (copy_from_user(buf, buffer, count)) {
 454                 free_page((unsigned long)buf);
 455                 return -EFAULT;
 456         }
 457
 458         buf[count] = '\0';
 459
 460         /*
 461          * Skip over leading whitespace
 462          */
 463         while (count && isspace(*s)) {
 464                 --count;
 465                 ++s;
 466         }
 467         /*
 468          * Do one full pass to verify all parameters,
 469          * then do another to actually write the new settings.
 470          */
 471         do {
 472                 char *p = s;
 473                 n = count;
 474                 while (n > 0) {
 475                         unsigned val;
 476                         char *q = p;
 477
 478                         while (n > 0 && *p != ':') {
 479                                 --n;
 480                                 p++;
 481                         }
 482                         if (*p != ':')
 483                                 goto parse_error;
 484                         if (p - q > MAX_LEN)
 485                                 goto parse_error;
 486                         memcpy(name, q, p - q);
 487                         name[p - q] = 0;
 488
 489                         if (n > 0) {
 490                                 --n;
 491                                 p++;
 492                         } else
 493                                 goto parse_error;
 494
 495                         val = simple_strtoul(p, &q, 10);
 496                         n -= q - p;
 497                         p = q;
 498                         if (n > 0 && !isspace(*p))
 499                                 goto parse_error;
 500                         while (n > 0 && isspace(*p)) {
 501                                 --n;
 502                                 ++p;
 503                         }
 504
 505                         mutex_lock(&ide_setting_mtx);
 506                         setting = ide_find_setting_by_name(drive, name);
 507                         if (!setting) {
 508                                 mutex_unlock(&ide_setting_mtx);
 509                                 goto parse_error;
 510                         }
 511                         if (for_real)
 512                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
 513                         mutex_unlock(&ide_setting_mtx);
 514                 }
 515         } while (!for_real++);
 516         free_page((unsigned long)buf);
 517         return count;
 518 parse_error:
 519         free_page((unsigned long)buf);
 520         printk("proc_ide_write_settings(): parse error\n");
 521         return -EINVAL;
 522 }
 523
 524 int proc_ide_read_capacity
 525         (char *page, char **start, off_t off, int count, int *eof, void *data)
 526 {
 527         int len = sprintf(page, "%llu\n", (long long)0x7fffffff);
 528         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 529 }
 530
 531 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 532
 533 int proc_ide_read_geometry
 534         (char *page, char **start, off_t off, int count, int *eof, void *data)
 535 {
 536         ide_drive_t     *drive = (ide_drive_t *) data;
 537         char            *out = page;
 538         int             len;
 539
 540         out += sprintf(out, "physical     %d/%d/%d\n",
 541                         drive->cyl, drive->head, drive->sect);
 542         out += sprintf(out, "logical      %d/%d/%d\n",
 543                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 544
 545         len = out - page;
 546         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 547 }
 548
 549 EXPORT_SYMBOL(proc_ide_read_geometry);
 550
 551 static int proc_ide_read_dmodel
 552         (char *page, char **start, off_t off, int count, int *eof, void *data)
 553 {
 554         ide_drive_t     *drive = (ide_drive_t *) data;
 555         char            *m = (char *)&drive->id[ATA_ID_PROD];
 556         int             len;
 557
 558         len = sprintf(page, "%.40s\n", m[0] ? m : "(none)");
 559         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 560 }
 561
 562 static int proc_ide_read_driver
 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 device   *dev = &drive->gendev;
 567         ide_driver_t    *ide_drv;
 568         int             len;
 569
 570         if (dev->driver) {
 571                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 572                 len = sprintf(page, "%s version %s\n",
 573                                 dev->driver->name, ide_drv->version);
 574         } else
 575                 len = sprintf(page, "ide-default version 0.9.newide\n");
 576         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 577 }
 578
 579 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 580 {
 581         struct device *dev = &drive->gendev;
 582         int ret = 1;
 583         int err;
 584
 585         device_release_driver(dev);
 586         /* FIXME: device can still be in use by previous driver */
 587         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 588         err = device_attach(dev);
 589         if (err < 0)
 590                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 591                         __func__, err);
 592         drive->driver_req[0] = 0;
 593         if (dev->driver == NULL) {
 594                 err = device_attach(dev);
 595                 if (err < 0)
 596                         printk(KERN_WARNING
 597                                 "IDE: %s: device_attach(2) error: %d\n",
 598                                 __func__, err);
 599         }
 600         if (dev->driver && !strcmp(dev->driver->name, driver))
 601                 ret = 0;
 602
 603         return ret;
 604 }
 605
 606 static int proc_ide_write_driver
 607         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 608 {
 609         ide_drive_t     *drive = (ide_drive_t *) data;
 610         char name[32];
 611
 612         if (!capable(CAP_SYS_ADMIN))
 613                 return -EACCES;
 614         if (count > 31)
 615                 count = 31;
 616         if (copy_from_user(name, buffer, count))
 617                 return -EFAULT;
 618         name[count] = '\0';
 619         if (ide_replace_subdriver(drive, name))
 620                 return -EINVAL;
 621         return count;
 622 }
 623
 624 static int proc_ide_read_media
 625         (char *page, char **start, off_t off, int count, int *eof, void *data)
 626 {
 627         ide_drive_t     *drive = (ide_drive_t *) data;
 628         const char      *media;
 629         int             len;
 630
 631         switch (drive->media) {
 632         case ide_disk:          media = "disk\n";       break;
 633         case ide_cdrom:         media = "cdrom\n";      break;
 634         case ide_tape:          media = "tape\n";       break;
 635         case ide_floppy:        media = "floppy\n";     break;
 636         case ide_optical:       media = "optical\n";    break;
 637         default:                media = "UNKNOWN\n";    break;
 638         }
 639         strcpy(page, media);
 640         len = strlen(media);
 641         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 642 }
 643
 644 static ide_proc_entry_t generic_drive_entries[] = {
 645         { "driver",     S_IFREG|S_IRUGO,         proc_ide_read_driver,
 646                                                  proc_ide_write_driver },
 647         { "identify",   S_IFREG|S_IRUSR,         proc_ide_read_identify, NULL },
 648         { "media",      S_IFREG|S_IRUGO,         proc_ide_read_media,    NULL },
 649         { "model",      S_IFREG|S_IRUGO,         proc_ide_read_dmodel,   NULL },
 650         { "settings",   S_IFREG|S_IRUSR|S_IWUSR, proc_ide_read_settings,
 651                                                  proc_ide_write_settings },
 652         { NULL, 0, NULL, NULL }
 653 };
 654
 655 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 656 {
 657         struct proc_dir_entry *ent;
 658
 659         if (!dir || !p)
 660                 return;
 661         while (p->name != NULL) {
 662                 ent = create_proc_entry(p->name, p->mode, dir);
 663                 if (!ent) return;
 664                 ent->data = data;
 665                 ent->read_proc = p->read_proc;
 666                 ent->write_proc = p->write_proc;
 667                 p++;
 668         }
 669 }
 670
 671 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 672 {
 673         if (!dir || !p)
 674                 return;
 675         while (p->name != NULL) {
 676                 remove_proc_entry(p->name, dir);
 677                 p++;
 678         }
 679 }
 680
 681 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 682 {
 683         ide_add_proc_entries(drive->proc, driver->proc, drive);
 684 }
 685
 686 EXPORT_SYMBOL(ide_proc_register_driver);
 687
 688 /**
 689  *      ide_proc_unregister_driver      -       remove driver specific data
 690  *      @drive: drive
 691  *      @driver: driver
 692  *
 693  *      Clean up the driver specific /proc files and IDE settings
 694  *      for a given drive.
 695  *
 696  *      Takes ide_setting_mtx and ide_lock.
 697  *      Caller must hold none of the locks.
 698  */
 699
 700 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 701 {
 702         unsigned long flags;
 703
 704         ide_remove_proc_entries(drive->proc, driver->proc);
 705
 706         mutex_lock(&ide_setting_mtx);
 707         spin_lock_irqsave(&ide_lock, flags);
 708         /*
 709          * ide_setting_mtx protects the settings list
 710          * ide_lock protects the use of settings
 711          *
 712          * so we need to hold both, ide_settings_sem because we want to
 713          * modify the settings list, and ide_lock because we cannot take
 714          * a setting out that is being used.
 715          *
 716          * OTOH both ide_{read,write}_setting are only ever used under
 717          * ide_setting_mtx.
 718          */
 719         auto_remove_settings(drive);
 720         spin_unlock_irqrestore(&ide_lock, flags);
 721         mutex_unlock(&ide_setting_mtx);
 722 }
 723 EXPORT_SYMBOL(ide_proc_unregister_driver);
 724
 725 void ide_proc_port_register_devices(ide_hwif_t *hwif)
 726 {
 727         int     d;
 728         struct proc_dir_entry *ent;
 729         struct proc_dir_entry *parent = hwif->proc;
 730         char name[64];
 731
 732         for (d = 0; d < MAX_DRIVES; d++) {
 733                 ide_drive_t *drive = &hwif->drives[d];
 734
 735                 if (!drive->present)
 736                         continue;
 737                 if (drive->proc)
 738                         continue;
 739
 740                 drive->proc = proc_mkdir(drive->name, parent);
 741                 if (drive->proc)
 742                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 743                 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 744                 ent = proc_symlink(drive->name, proc_ide_root, name);
 745                 if (!ent) return;
 746         }
 747 }
 748
 749 void ide_proc_unregister_device(ide_drive_t *drive)
 750 {
 751         if (drive->proc) {
 752                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 753                 remove_proc_entry(drive->name, proc_ide_root);
 754                 remove_proc_entry(drive->name, drive->hwif->proc);
 755                 drive->proc = NULL;
 756         }
 757 }
 758
 759 static ide_proc_entry_t hwif_entries[] = {
 760         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 761         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 762         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 763         { NULL, 0, NULL, NULL }
 764 };
 765
 766 void ide_proc_register_port(ide_hwif_t *hwif)
 767 {
 768         if (!hwif->proc) {
 769                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 770
 771                 if (!hwif->proc)
 772                         return;
 773
 774                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 775         }
 776 }
 777
 778 void ide_proc_unregister_port(ide_hwif_t *hwif)
 779 {
 780         if (hwif->proc) {
 781                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 782                 remove_proc_entry(hwif->name, proc_ide_root);
 783                 hwif->proc = NULL;
 784         }
 785 }
 786
 787 static int proc_print_driver(struct device_driver *drv, void *data)
 788 {
 789         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
 790         struct seq_file *s = data;
 791
 792         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 793
 794         return 0;
 795 }
 796
 797 static int ide_drivers_show(struct seq_file *s, void *p)
 798 {
 799         int err;
 800
 801         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 802         if (err < 0)
 803                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 804                         __func__, err);
 805         return 0;
 806 }
 807
 808 static int ide_drivers_open(struct inode *inode, struct file *file)
 809 {
 810         return single_open(file, &ide_drivers_show, NULL);
 811 }
 812
 813 static const struct file_operations ide_drivers_operations = {
 814         .owner          = THIS_MODULE,
 815         .open           = ide_drivers_open,
 816         .read           = seq_read,
 817         .llseek         = seq_lseek,
 818         .release        = single_release,
 819 };
 820
 821 void proc_ide_create(void)
 822 {
 823         proc_ide_root = proc_mkdir("ide", NULL);
 824
 825         if (!proc_ide_root)
 826                 return;
 827
 828         proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
 829 }
 830
 831 void proc_ide_destroy(void)
 832 {
 833         remove_proc_entry("drivers", proc_ide_root);
 834         remove_proc_entry("ide", NULL);
 835 }