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         switch (hwif->chipset) {
  50                 case ide_generic:       name = "generic";       break;
  51                 case ide_pci:           name = "pci";           break;
  52                 case ide_cmd640:        name = "cmd640";        break;
  53                 case ide_dtc2278:       name = "dtc2278";       break;
  54                 case ide_ali14xx:       name = "ali14xx";       break;
  55                 case ide_qd65xx:        name = "qd65xx";        break;
  56                 case ide_umc8672:       name = "umc8672";       break;
  57                 case ide_ht6560b:       name = "ht6560b";       break;
  58                 case ide_rz1000:        name = "rz1000";        break;
  59                 case ide_trm290:        name = "trm290";        break;
  60                 case ide_cmd646:        name = "cmd646";        break;
  61                 case ide_cy82c693:      name = "cy82c693";      break;
  62                 case ide_4drives:       name = "4drives";       break;
  63                 case ide_pmac:          name = "mac-io";        break;
  64                 case ide_au1xxx:        name = "au1xxx";        break;
  65                 case ide_palm3710:      name = "palm3710";      break;
  66                 case ide_etrax100:      name = "etrax100";      break;
  67                 case ide_acorn:         name = "acorn";         break;
  68                 default:                name = "(unknown)";     break;
  69         }
  70         len = sprintf(page, "%s\n", name);
  71         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
  72 }
  73
  74 static int proc_ide_read_mate
  75         (char *page, char **start, off_t off, int count, int *eof, void *data)
  76 {
  77         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  78         int             len;
  79
  80         if (hwif && hwif->mate && hwif->mate->present)
  81                 len = sprintf(page, "%s\n", hwif->mate->name);
  82         else
  83                 len = sprintf(page, "(none)\n");
  84         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
  85 }
  86
  87 static int proc_ide_read_channel
  88         (char *page, char **start, off_t off, int count, int *eof, void *data)
  89 {
  90         ide_hwif_t      *hwif = (ide_hwif_t *) data;
  91         int             len;
  92
  93         page[0] = hwif->channel ? '1' : '0';
  94         page[1] = '\n';
  95         len = 2;
  96         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
  97 }
  98
  99 static int proc_ide_read_identify
 100         (char *page, char **start, off_t off, int count, int *eof, void *data)
 101 {
 102         ide_drive_t     *drive = (ide_drive_t *)data;
 103         int             len = 0, i = 0;
 104         int             err = 0;
 105
 106         len = sprintf(page, "\n");
 107
 108         if (drive) {
 109                 unsigned short *val = (unsigned short *) page;
 110
 111                 err = taskfile_lib_get_identify(drive, page);
 112                 if (!err) {
 113                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
 114                         page = out;
 115                         do {
 116                                 out += sprintf(out, "%04x%c",
 117                                         le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
 118                                 val += 1;
 119                         } while (i < (SECTOR_WORDS * 2));
 120                         len = out - page;
 121                 }
 122         }
 123         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 124 }
 125
 126 /**
 127  *      __ide_add_setting       -       add an ide setting option
 128  *      @drive: drive to use
 129  *      @name: setting name
 130  *      @rw: true if the function is read write
 131  *      @data_type: type of data
 132  *      @min: range minimum
 133  *      @max: range maximum
 134  *      @mul_factor: multiplication scale
 135  *      @div_factor: divison scale
 136  *      @data: private data field
 137  *      @set: setting
 138  *      @auto_remove: setting auto removal flag
 139  *
 140  *      Removes the setting named from the device if it is present.
 141  *      The function takes the settings_lock to protect against
 142  *      parallel changes. This function must not be called from IRQ
 143  *      context. Returns 0 on success or -1 on failure.
 144  *
 145  *      BUGS: This code is seriously over-engineered. There is also
 146  *      magic about how the driver specific features are setup. If
 147  *      a driver is attached we assume the driver settings are auto
 148  *      remove.
 149  */
 150
 151 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)
 152 {
 153         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 154
 155         mutex_lock(&ide_setting_mtx);
 156         while ((*p) && strcmp((*p)->name, name) < 0)
 157                 p = &((*p)->next);
 158         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 159                 goto abort;
 160         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 161                 goto abort;
 162         strcpy(setting->name, name);
 163         setting->rw = rw;
 164         setting->data_type = data_type;
 165         setting->min = min;
 166         setting->max = max;
 167         setting->mul_factor = mul_factor;
 168         setting->div_factor = div_factor;
 169         setting->data = data;
 170         setting->set = set;
 171
 172         setting->next = *p;
 173         if (auto_remove)
 174                 setting->auto_remove = 1;
 175         *p = setting;
 176         mutex_unlock(&ide_setting_mtx);
 177         return 0;
 178 abort:
 179         mutex_unlock(&ide_setting_mtx);
 180         kfree(setting);
 181         return -1;
 182 }
 183
 184 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)
 185 {
 186         return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
 187 }
 188
 189 EXPORT_SYMBOL(ide_add_setting);
 190
 191 /**
 192  *      __ide_remove_setting    -       remove an ide setting option
 193  *      @drive: drive to use
 194  *      @name: setting name
 195  *
 196  *      Removes the setting named from the device if it is present.
 197  *      The caller must hold the setting semaphore.
 198  */
 199
 200 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 201 {
 202         ide_settings_t **p, *setting;
 203
 204         p = (ide_settings_t **) &drive->settings;
 205
 206         while ((*p) && strcmp((*p)->name, name))
 207                 p = &((*p)->next);
 208         if ((setting = (*p)) == NULL)
 209                 return;
 210
 211         (*p) = setting->next;
 212
 213         kfree(setting->name);
 214         kfree(setting);
 215 }
 216
 217 /**
 218  *      auto_remove_settings    -       remove driver specific settings
 219  *      @drive: drive
 220  *
 221  *      Automatically remove all the driver specific settings for this
 222  *      drive. This function may not be called from IRQ context. The
 223  *      caller must hold ide_setting_mtx.
 224  */
 225
 226 static void auto_remove_settings (ide_drive_t *drive)
 227 {
 228         ide_settings_t *setting;
 229 repeat:
 230         setting = drive->settings;
 231         while (setting) {
 232                 if (setting->auto_remove) {
 233                         __ide_remove_setting(drive, setting->name);
 234                         goto repeat;
 235                 }
 236                 setting = setting->next;
 237         }
 238 }
 239
 240 /**
 241  *      ide_find_setting_by_name        -       find a drive specific setting
 242  *      @drive: drive to scan
 243  *      @name: setting name
 244  *
 245  *      Scan's the device setting table for a matching entry and returns
 246  *      this or NULL if no entry is found. The caller must hold the
 247  *      setting semaphore
 248  */
 249
 250 static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name)
 251 {
 252         ide_settings_t *setting = drive->settings;
 253
 254         while (setting) {
 255                 if (strcmp(setting->name, name) == 0)
 256                         break;
 257                 setting = setting->next;
 258         }
 259         return setting;
 260 }
 261
 262 /**
 263  *      ide_read_setting        -       read an IDE setting
 264  *      @drive: drive to read from
 265  *      @setting: drive setting
 266  *
 267  *      Read a drive setting and return the value. The caller
 268  *      must hold the ide_setting_mtx when making this call.
 269  *
 270  *      BUGS: the data return and error are the same return value
 271  *      so an error -EINVAL and true return of the same value cannot
 272  *      be told apart
 273  */
 274
 275 static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting)
 276 {
 277         int             val = -EINVAL;
 278         unsigned long   flags;
 279
 280         if ((setting->rw & SETTING_READ)) {
 281                 spin_lock_irqsave(&ide_lock, flags);
 282                 switch(setting->data_type) {
 283                         case TYPE_BYTE:
 284                                 val = *((u8 *) setting->data);
 285                                 break;
 286                         case TYPE_SHORT:
 287                                 val = *((u16 *) setting->data);
 288                                 break;
 289                         case TYPE_INT:
 290                                 val = *((u32 *) setting->data);
 291                                 break;
 292                 }
 293                 spin_unlock_irqrestore(&ide_lock, flags);
 294         }
 295         return val;
 296 }
 297
 298 /**
 299  *      ide_write_setting       -       read an IDE setting
 300  *      @drive: drive to read from
 301  *      @setting: drive setting
 302  *      @val: value
 303  *
 304  *      Write a drive setting if it is possible. The caller
 305  *      must hold the ide_setting_mtx when making this call.
 306  *
 307  *      BUGS: the data return and error are the same return value
 308  *      so an error -EINVAL and true return of the same value cannot
 309  *      be told apart
 310  *
 311  *      FIXME:  This should be changed to enqueue a special request
 312  *      to the driver to change settings, and then wait on a sema for completion.
 313  *      The current scheme of polling is kludgy, though safe enough.
 314  */
 315
 316 static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val)
 317 {
 318         if (!capable(CAP_SYS_ADMIN))
 319                 return -EACCES;
 320         if (setting->set)
 321                 return setting->set(drive, val);
 322         if (!(setting->rw & SETTING_WRITE))
 323                 return -EPERM;
 324         if (val < setting->min || val > setting->max)
 325                 return -EINVAL;
 326         if (ide_spin_wait_hwgroup(drive))
 327                 return -EBUSY;
 328         switch (setting->data_type) {
 329                 case TYPE_BYTE:
 330                         *((u8 *) setting->data) = val;
 331                         break;
 332                 case TYPE_SHORT:
 333                         *((u16 *) setting->data) = val;
 334                         break;
 335                 case TYPE_INT:
 336                         *((u32 *) setting->data) = val;
 337                         break;
 338         }
 339         spin_unlock_irq(&ide_lock);
 340         return 0;
 341 }
 342
 343 static int set_xfer_rate (ide_drive_t *drive, int arg)
 344 {
 345         ide_task_t task;
 346         int err;
 347
 348         if (arg < 0 || arg > 70)
 349                 return -EINVAL;
 350
 351         memset(&task, 0, sizeof(task));
 352         task.tf.command = WIN_SETFEATURES;
 353         task.tf.feature = SETFEATURES_XFER;
 354         task.tf.nsect   = (u8)arg;
 355         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
 356                         IDE_TFLAG_IN_NSECT;
 357
 358         err = ide_no_data_taskfile(drive, &task);
 359
 360         if (!err && arg) {
 361                 ide_set_xfer_rate(drive, (u8) arg);
 362                 ide_driveid_update(drive);
 363         }
 364         return err;
 365 }
 366
 367 /**
 368  *      ide_add_generic_settings        -       generic ide settings
 369  *      @drive: drive being configured
 370  *
 371  *      Add the generic parts of the system settings to the /proc files.
 372  *      The caller must not be holding the ide_setting_mtx.
 373  */
 374
 375 void ide_add_generic_settings (ide_drive_t *drive)
 376 {
 377 /*
 378  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
 379  */
 380         __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);
 381         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
 382         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
 383         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
 384         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
 385         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
 386         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
 387         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
 388         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
 389 }
 390
 391 static void proc_ide_settings_warn(void)
 392 {
 393         static int warned = 0;
 394
 395         if (warned)
 396                 return;
 397
 398         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 399                             "obsolete, and will be removed soon!\n");
 400         warned = 1;
 401 }
 402
 403 static int proc_ide_read_settings
 404         (char *page, char **start, off_t off, int count, int *eof, void *data)
 405 {
 406         ide_drive_t     *drive = (ide_drive_t *) data;
 407         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
 408         char            *out = page;
 409         int             len, rc, mul_factor, div_factor;
 410
 411         proc_ide_settings_warn();
 412
 413         mutex_lock(&ide_setting_mtx);
 414         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 415         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 416         while(setting) {
 417                 mul_factor = setting->mul_factor;
 418                 div_factor = setting->div_factor;
 419                 out += sprintf(out, "%-24s", setting->name);
 420                 if ((rc = ide_read_setting(drive, setting)) >= 0)
 421                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
 422                 else
 423                         out += sprintf(out, "%-16s", "write-only");
 424                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 425                 if (setting->rw & SETTING_READ)
 426                         out += sprintf(out, "r");
 427                 if (setting->rw & SETTING_WRITE)
 428                         out += sprintf(out, "w");
 429                 out += sprintf(out, "\n");
 430                 setting = setting->next;
 431         }
 432         len = out - page;
 433         mutex_unlock(&ide_setting_mtx);
 434         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 435 }
 436
 437 #define MAX_LEN 30
 438
 439 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 440                                    unsigned long count, void *data)
 441 {
 442         ide_drive_t     *drive = (ide_drive_t *) data;
 443         char            name[MAX_LEN + 1];
 444         int             for_real = 0;
 445         unsigned long   n;
 446         ide_settings_t  *setting;
 447         char *buf, *s;
 448
 449         if (!capable(CAP_SYS_ADMIN))
 450                 return -EACCES;
 451
 452         proc_ide_settings_warn();
 453
 454         if (count >= PAGE_SIZE)
 455                 return -EINVAL;
 456
 457         s = buf = (char *)__get_free_page(GFP_USER);
 458         if (!buf)
 459                 return -ENOMEM;
 460
 461         if (copy_from_user(buf, buffer, count)) {
 462                 free_page((unsigned long)buf);
 463                 return -EFAULT;
 464         }
 465
 466         buf[count] = '\0';
 467
 468         /*
 469          * Skip over leading whitespace
 470          */
 471         while (count && isspace(*s)) {
 472                 --count;
 473                 ++s;
 474         }
 475         /*
 476          * Do one full pass to verify all parameters,
 477          * then do another to actually write the new settings.
 478          */
 479         do {
 480                 char *p = s;
 481                 n = count;
 482                 while (n > 0) {
 483                         unsigned val;
 484                         char *q = p;
 485
 486                         while (n > 0 && *p != ':') {
 487                                 --n;
 488                                 p++;
 489                         }
 490                         if (*p != ':')
 491                                 goto parse_error;
 492                         if (p - q > MAX_LEN)
 493                                 goto parse_error;
 494                         memcpy(name, q, p - q);
 495                         name[p - q] = 0;
 496
 497                         if (n > 0) {
 498                                 --n;
 499                                 p++;
 500                         } else
 501                                 goto parse_error;
 502
 503                         val = simple_strtoul(p, &q, 10);
 504                         n -= q - p;
 505                         p = q;
 506                         if (n > 0 && !isspace(*p))
 507                                 goto parse_error;
 508                         while (n > 0 && isspace(*p)) {
 509                                 --n;
 510                                 ++p;
 511                         }
 512
 513                         mutex_lock(&ide_setting_mtx);
 514                         setting = ide_find_setting_by_name(drive, name);
 515                         if (!setting)
 516                         {
 517                                 mutex_unlock(&ide_setting_mtx);
 518                                 goto parse_error;
 519                         }
 520                         if (for_real)
 521                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
 522                         mutex_unlock(&ide_setting_mtx);
 523                 }
 524         } while (!for_real++);
 525         free_page((unsigned long)buf);
 526         return count;
 527 parse_error:
 528         free_page((unsigned long)buf);
 529         printk("proc_ide_write_settings(): parse error\n");
 530         return -EINVAL;
 531 }
 532
 533 int proc_ide_read_capacity
 534         (char *page, char **start, off_t off, int count, int *eof, void *data)
 535 {
 536         int len = sprintf(page,"%llu\n", (long long)0x7fffffff);
 537         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 538 }
 539
 540 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
 541
 542 int proc_ide_read_geometry
 543         (char *page, char **start, off_t off, int count, int *eof, void *data)
 544 {
 545         ide_drive_t     *drive = (ide_drive_t *) data;
 546         char            *out = page;
 547         int             len;
 548
 549         out += sprintf(out,"physical     %d/%d/%d\n",
 550                         drive->cyl, drive->head, drive->sect);
 551         out += sprintf(out,"logical      %d/%d/%d\n",
 552                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 553
 554         len = out - page;
 555         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 556 }
 557
 558 EXPORT_SYMBOL(proc_ide_read_geometry);
 559
 560 static int proc_ide_read_dmodel
 561         (char *page, char **start, off_t off, int count, int *eof, void *data)
 562 {
 563         ide_drive_t     *drive = (ide_drive_t *) data;
 564         struct hd_driveid *id = drive->id;
 565         int             len;
 566
 567         len = sprintf(page, "%.40s\n",
 568                 (id && id->model[0]) ? (char *)id->model : "(none)");
 569         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 570 }
 571
 572 static int proc_ide_read_driver
 573         (char *page, char **start, off_t off, int count, int *eof, void *data)
 574 {
 575         ide_drive_t     *drive = (ide_drive_t *) data;
 576         struct device   *dev = &drive->gendev;
 577         ide_driver_t    *ide_drv;
 578         int             len;
 579
 580         if (dev->driver) {
 581                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
 582                 len = sprintf(page, "%s version %s\n",
 583                                 dev->driver->name, ide_drv->version);
 584         } else
 585                 len = sprintf(page, "ide-default version 0.9.newide\n");
 586         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 587 }
 588
 589 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 590 {
 591         struct device *dev = &drive->gendev;
 592         int ret = 1;
 593         int err;
 594
 595         device_release_driver(dev);
 596         /* FIXME: device can still be in use by previous driver */
 597         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 598         err = device_attach(dev);
 599         if (err < 0)
 600                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 601                         __FUNCTION__, err);
 602         drive->driver_req[0] = 0;
 603         if (dev->driver == NULL) {
 604                 err = device_attach(dev);
 605                 if (err < 0)
 606                         printk(KERN_WARNING
 607                                 "IDE: %s: device_attach(2) error: %d\n",
 608                                 __FUNCTION__, err);
 609         }
 610         if (dev->driver && !strcmp(dev->driver->name, driver))
 611                 ret = 0;
 612
 613         return ret;
 614 }
 615
 616 static int proc_ide_write_driver
 617         (struct file *file, const char __user *buffer, unsigned long count, void *data)
 618 {
 619         ide_drive_t     *drive = (ide_drive_t *) data;
 620         char name[32];
 621
 622         if (!capable(CAP_SYS_ADMIN))
 623                 return -EACCES;
 624         if (count > 31)
 625                 count = 31;
 626         if (copy_from_user(name, buffer, count))
 627                 return -EFAULT;
 628         name[count] = '\0';
 629         if (ide_replace_subdriver(drive, name))
 630                 return -EINVAL;
 631         return count;
 632 }
 633
 634 static int proc_ide_read_media
 635         (char *page, char **start, off_t off, int count, int *eof, void *data)
 636 {
 637         ide_drive_t     *drive = (ide_drive_t *) data;
 638         const char      *media;
 639         int             len;
 640
 641         switch (drive->media) {
 642                 case ide_disk:  media = "disk\n";
 643                                 break;
 644                 case ide_cdrom: media = "cdrom\n";
 645                                 break;
 646                 case ide_tape:  media = "tape\n";
 647                                 break;
 648                 case ide_floppy:media = "floppy\n";
 649                                 break;
 650                 case ide_optical:media = "optical\n";
 651                                 break;
 652                 default:        media = "UNKNOWN\n";
 653                                 break;
 654         }
 655         strcpy(page,media);
 656         len = strlen(media);
 657         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 658 }
 659
 660 static ide_proc_entry_t generic_drive_entries[] = {
 661         { "driver",     S_IFREG|S_IRUGO,        proc_ide_read_driver,   proc_ide_write_driver },
 662         { "identify",   S_IFREG|S_IRUSR,        proc_ide_read_identify, NULL },
 663         { "media",      S_IFREG|S_IRUGO,        proc_ide_read_media,    NULL },
 664         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_dmodel,   NULL },
 665         { "settings",   S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings },
 666         { NULL, 0, NULL, NULL }
 667 };
 668
 669 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 670 {
 671         struct proc_dir_entry *ent;
 672
 673         if (!dir || !p)
 674                 return;
 675         while (p->name != NULL) {
 676                 ent = create_proc_entry(p->name, p->mode, dir);
 677                 if (!ent) return;
 678                 ent->data = data;
 679                 ent->read_proc = p->read_proc;
 680                 ent->write_proc = p->write_proc;
 681                 p++;
 682         }
 683 }
 684
 685 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 686 {
 687         if (!dir || !p)
 688                 return;
 689         while (p->name != NULL) {
 690                 remove_proc_entry(p->name, dir);
 691                 p++;
 692         }
 693 }
 694
 695 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
 696 {
 697         ide_add_proc_entries(drive->proc, driver->proc, drive);
 698 }
 699
 700 EXPORT_SYMBOL(ide_proc_register_driver);
 701
 702 /**
 703  *      ide_proc_unregister_driver      -       remove driver specific data
 704  *      @drive: drive
 705  *      @driver: driver
 706  *
 707  *      Clean up the driver specific /proc files and IDE settings
 708  *      for a given drive.
 709  *
 710  *      Takes ide_setting_mtx and ide_lock.
 711  *      Caller must hold none of the locks.
 712  */
 713
 714 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 715 {
 716         unsigned long flags;
 717
 718         ide_remove_proc_entries(drive->proc, driver->proc);
 719
 720         mutex_lock(&ide_setting_mtx);
 721         spin_lock_irqsave(&ide_lock, flags);
 722         /*
 723          * ide_setting_mtx protects the settings list
 724          * ide_lock protects the use of settings
 725          *
 726          * so we need to hold both, ide_settings_sem because we want to
 727          * modify the settings list, and ide_lock because we cannot take
 728          * a setting out that is being used.
 729          *
 730          * OTOH both ide_{read,write}_setting are only ever used under
 731          * ide_setting_mtx.
 732          */
 733         auto_remove_settings(drive);
 734         spin_unlock_irqrestore(&ide_lock, flags);
 735         mutex_unlock(&ide_setting_mtx);
 736 }
 737
 738 EXPORT_SYMBOL(ide_proc_unregister_driver);
 739
 740 void ide_proc_port_register_devices(ide_hwif_t *hwif)
 741 {
 742         int     d;
 743         struct proc_dir_entry *ent;
 744         struct proc_dir_entry *parent = hwif->proc;
 745         char name[64];
 746
 747         for (d = 0; d < MAX_DRIVES; d++) {
 748                 ide_drive_t *drive = &hwif->drives[d];
 749
 750                 if (!drive->present)
 751                         continue;
 752                 if (drive->proc)
 753                         continue;
 754
 755                 drive->proc = proc_mkdir(drive->name, parent);
 756                 if (drive->proc)
 757                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 758                 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 759                 ent = proc_symlink(drive->name, proc_ide_root, name);
 760                 if (!ent) return;
 761         }
 762 }
 763
 764 void ide_proc_unregister_device(ide_drive_t *drive)
 765 {
 766         if (drive->proc) {
 767                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 768                 remove_proc_entry(drive->name, proc_ide_root);
 769                 remove_proc_entry(drive->name, drive->hwif->proc);
 770                 drive->proc = NULL;
 771         }
 772 }
 773
 774 static ide_proc_entry_t hwif_entries[] = {
 775         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
 776         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
 777         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
 778         { NULL, 0, NULL, NULL }
 779 };
 780
 781 void ide_proc_register_port(ide_hwif_t *hwif)
 782 {
 783         if (!hwif->proc) {
 784                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 785
 786                 if (!hwif->proc)
 787                         return;
 788
 789                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 790         }
 791 }
 792
 793 #ifdef CONFIG_BLK_DEV_IDEPCI
 794 void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
 795 {
 796         create_proc_info_entry(name, 0, proc_ide_root, get_info);
 797 }
 798
 799 EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
 800 #endif
 801
 802 void ide_proc_unregister_port(ide_hwif_t *hwif)
 803 {
 804         if (hwif->proc) {
 805                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 806                 remove_proc_entry(hwif->name, proc_ide_root);
 807                 hwif->proc = NULL;
 808         }
 809 }
 810
 811 static int proc_print_driver(struct device_driver *drv, void *data)
 812 {
 813         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
 814         struct seq_file *s = data;
 815
 816         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 817
 818         return 0;
 819 }
 820
 821 static int ide_drivers_show(struct seq_file *s, void *p)
 822 {
 823         int err;
 824
 825         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 826         if (err < 0)
 827                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 828                         __FUNCTION__, err);
 829         return 0;
 830 }
 831
 832 static int ide_drivers_open(struct inode *inode, struct file *file)
 833 {
 834         return single_open(file, &ide_drivers_show, NULL);
 835 }
 836
 837 static const struct file_operations ide_drivers_operations = {
 838         .open           = ide_drivers_open,
 839         .read           = seq_read,
 840         .llseek         = seq_lseek,
 841         .release        = single_release,
 842 };
 843
 844 void proc_ide_create(void)
 845 {
 846         struct proc_dir_entry *entry;
 847
 848         proc_ide_root = proc_mkdir("ide", NULL);
 849
 850         if (!proc_ide_root)
 851                 return;
 852
 853         entry = create_proc_entry("drivers", 0, proc_ide_root);
 854         if (entry)
 855                 entry->proc_fops = &ide_drivers_operations;
 856 }
 857
 858 void proc_ide_destroy(void)
 859 {
 860         remove_proc_entry("drivers", proc_ide_root);
 861         remove_proc_entry("ide", NULL);
 862 }