drivers/ide/ide-proc.c

   1 /*
   2  *  Copyright (C) 1997-1998     Mark Lord
   3  *  Copyright (C) 2003          Red Hat
   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 ide_imodel_proc_show(struct seq_file *m, void *v)
  34 {
  35         ide_hwif_t      *hwif = (ide_hwif_t *) m->private;
  36         const char      *name;
  37
  38         switch (hwif->chipset) {
  39         case ide_generic:       name = "generic";       break;
  40         case ide_pci:           name = "pci";           break;
  41         case ide_cmd640:        name = "cmd640";        break;
  42         case ide_dtc2278:       name = "dtc2278";       break;
  43         case ide_ali14xx:       name = "ali14xx";       break;
  44         case ide_qd65xx:        name = "qd65xx";        break;
  45         case ide_umc8672:       name = "umc8672";       break;
  46         case ide_ht6560b:       name = "ht6560b";       break;
  47         case ide_4drives:       name = "4drives";       break;
  48         case ide_pmac:          name = "mac-io";        break;
  49         case ide_au1xxx:        name = "au1xxx";        break;
  50         case ide_palm3710:      name = "palm3710";      break;
  51         case ide_acorn:         name = "acorn";         break;
  52         default:                name = "(unknown)";     break;
  53         }
  54         seq_printf(m, "%s\n", name);
  55         return 0;
  56 }
  57
  58 static int ide_imodel_proc_open(struct inode *inode, struct file *file)
  59 {
  60         return single_open(file, ide_imodel_proc_show, PDE(inode)->data);
  61 }
  62
  63 static const struct file_operations ide_imodel_proc_fops = {
  64         .owner          = THIS_MODULE,
  65         .open           = ide_imodel_proc_open,
  66         .read           = seq_read,
  67         .llseek         = seq_lseek,
  68         .release        = single_release,
  69 };
  70
  71 static int ide_mate_proc_show(struct seq_file *m, void *v)
  72 {
  73         ide_hwif_t      *hwif = (ide_hwif_t *) m->private;
  74
  75         if (hwif && hwif->mate)
  76                 seq_printf(m, "%s\n", hwif->mate->name);
  77         else
  78                 seq_printf(m, "(none)\n");
  79         return 0;
  80 }
  81
  82 static int ide_mate_proc_open(struct inode *inode, struct file *file)
  83 {
  84         return single_open(file, ide_mate_proc_show, PDE(inode)->data);
  85 }
  86
  87 static const struct file_operations ide_mate_proc_fops = {
  88         .owner          = THIS_MODULE,
  89         .open           = ide_mate_proc_open,
  90         .read           = seq_read,
  91         .llseek         = seq_lseek,
  92         .release        = single_release,
  93 };
  94
  95 static int ide_channel_proc_show(struct seq_file *m, void *v)
  96 {
  97         ide_hwif_t      *hwif = (ide_hwif_t *) m->private;
  98
  99         seq_printf(m, "%c\n", hwif->channel ? '1' : '0');
 100         return 0;
 101 }
 102
 103 static int ide_channel_proc_open(struct inode *inode, struct file *file)
 104 {
 105         return single_open(file, ide_channel_proc_show, PDE(inode)->data);
 106 }
 107
 108 static const struct file_operations ide_channel_proc_fops = {
 109         .owner          = THIS_MODULE,
 110         .open           = ide_channel_proc_open,
 111         .read           = seq_read,
 112         .llseek         = seq_lseek,
 113         .release        = single_release,
 114 };
 115
 116 static int ide_identify_proc_show(struct seq_file *m, void *v)
 117 {
 118         ide_drive_t *drive = (ide_drive_t *)m->private;
 119         u8 *buf;
 120
 121         if (!drive) {
 122                 seq_putc(m, '\n');
 123                 return 0;
 124         }
 125
 126         buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
 127         if (!buf)
 128                 return -ENOMEM;
 129         if (taskfile_lib_get_identify(drive, buf) == 0) {
 130                 __le16 *val = (__le16 *)buf;
 131                 int i;
 132
 133                 for (i = 0; i < SECTOR_SIZE / 2; i++) {
 134                         seq_printf(m, "%04x%c", le16_to_cpu(val[i]),
 135                                         (i % 8) == 7 ? '\n' : ' ');
 136                 }
 137         } else
 138                 seq_putc(m, buf[0]);
 139         kfree(buf);
 140         return 0;
 141 }
 142
 143 static int ide_identify_proc_open(struct inode *inode, struct file *file)
 144 {
 145         return single_open(file, ide_identify_proc_show, PDE(inode)->data);
 146 }
 147
 148 static const struct file_operations ide_identify_proc_fops = {
 149         .owner          = THIS_MODULE,
 150         .open           = ide_identify_proc_open,
 151         .read           = seq_read,
 152         .llseek         = seq_lseek,
 153         .release        = single_release,
 154 };
 155
 156 /**
 157  *      ide_find_setting        -       find a specific setting
 158  *      @st: setting table pointer
 159  *      @name: setting name
 160  *
 161  *      Scan's the setting table for a matching entry and returns
 162  *      this or NULL if no entry is found. The caller must hold the
 163  *      setting semaphore
 164  */
 165
 166 static
 167 const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st,
 168                                                char *name)
 169 {
 170         while (st->name) {
 171                 if (strcmp(st->name, name) == 0)
 172                         break;
 173                 st++;
 174         }
 175         return st->name ? st : NULL;
 176 }
 177
 178 /**
 179  *      ide_read_setting        -       read an IDE setting
 180  *      @drive: drive to read from
 181  *      @setting: drive setting
 182  *
 183  *      Read a drive setting and return the value. The caller
 184  *      must hold the ide_setting_mtx when making this call.
 185  *
 186  *      BUGS: the data return and error are the same return value
 187  *      so an error -EINVAL and true return of the same value cannot
 188  *      be told apart
 189  */
 190
 191 static int ide_read_setting(ide_drive_t *drive,
 192                             const struct ide_proc_devset *setting)
 193 {
 194         const struct ide_devset *ds = setting->setting;
 195         int val = -EINVAL;
 196
 197         if (ds->get)
 198                 val = ds->get(drive);
 199
 200         return val;
 201 }
 202
 203 /**
 204  *      ide_write_setting       -       read an IDE setting
 205  *      @drive: drive to read from
 206  *      @setting: drive setting
 207  *      @val: value
 208  *
 209  *      Write a drive setting if it is possible. The caller
 210  *      must hold the ide_setting_mtx when making this call.
 211  *
 212  *      BUGS: the data return and error are the same return value
 213  *      so an error -EINVAL and true return of the same value cannot
 214  *      be told apart
 215  *
 216  *      FIXME:  This should be changed to enqueue a special request
 217  *      to the driver to change settings, and then wait on a sema for completion.
 218  *      The current scheme of polling is kludgy, though safe enough.
 219  */
 220
 221 static int ide_write_setting(ide_drive_t *drive,
 222                              const struct ide_proc_devset *setting, int val)
 223 {
 224         const struct ide_devset *ds = setting->setting;
 225
 226         if (!capable(CAP_SYS_ADMIN))
 227                 return -EACCES;
 228         if (!ds->set)
 229                 return -EPERM;
 230         if ((ds->flags & DS_SYNC)
 231             && (val < setting->min || val > setting->max))
 232                 return -EINVAL;
 233         return ide_devset_execute(drive, ds, val);
 234 }
 235
 236 ide_devset_get(xfer_rate, current_speed);
 237
 238 static int set_xfer_rate (ide_drive_t *drive, int arg)
 239 {
 240         struct ide_cmd cmd;
 241
 242         if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
 243                 return -EINVAL;
 244
 245         memset(&cmd, 0, sizeof(cmd));
 246         cmd.tf.command = ATA_CMD_SET_FEATURES;
 247         cmd.tf.feature = SETFEATURES_XFER;
 248         cmd.tf.nsect   = (u8)arg;
 249         cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT;
 250         cmd.valid.in.tf  = IDE_VALID_NSECT;
 251         cmd.tf_flags   = IDE_TFLAG_SET_XFER;
 252
 253         return ide_no_data_taskfile(drive, &cmd);
 254 }
 255
 256 ide_devset_rw(current_speed, xfer_rate);
 257 ide_devset_rw_field(init_speed, init_speed);
 258 ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1);
 259 ide_devset_rw_field(number, dn);
 260
 261 static const struct ide_proc_devset ide_generic_settings[] = {
 262         IDE_PROC_DEVSET(current_speed, 0, 70),
 263         IDE_PROC_DEVSET(init_speed, 0, 70),
 264         IDE_PROC_DEVSET(io_32bit,  0, 1 + (SUPPORT_VLB_SYNC << 1)),
 265         IDE_PROC_DEVSET(keepsettings, 0, 1),
 266         IDE_PROC_DEVSET(nice1, 0, 1),
 267         IDE_PROC_DEVSET(number, 0, 3),
 268         IDE_PROC_DEVSET(pio_mode, 0, 255),
 269         IDE_PROC_DEVSET(unmaskirq, 0, 1),
 270         IDE_PROC_DEVSET(using_dma, 0, 1),
 271         { NULL },
 272 };
 273
 274 static void proc_ide_settings_warn(void)
 275 {
 276         printk_once(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 277                             "obsolete, and will be removed soon!\n");
 278 }
 279
 280 static int ide_settings_proc_show(struct seq_file *m, void *v)
 281 {
 282         const struct ide_proc_devset *setting, *g, *d;
 283         const struct ide_devset *ds;
 284         ide_drive_t     *drive = (ide_drive_t *) m->private;
 285         int             rc, mul_factor, div_factor;
 286
 287         proc_ide_settings_warn();
 288
 289         mutex_lock(&ide_setting_mtx);
 290         g = ide_generic_settings;
 291         d = drive->settings;
 292         seq_printf(m, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 293         seq_printf(m, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 294         while (g->name || (d && d->name)) {
 295                 /* read settings in the alphabetical order */
 296                 if (g->name && d && d->name) {
 297                         if (strcmp(d->name, g->name) < 0)
 298                                 setting = d++;
 299                         else
 300                                 setting = g++;
 301                 } else if (d && d->name) {
 302                         setting = d++;
 303                 } else
 304                         setting = g++;
 305                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 306                 div_factor = setting->divf ? setting->divf(drive) : 1;
 307                 seq_printf(m, "%-24s", setting->name);
 308                 rc = ide_read_setting(drive, setting);
 309                 if (rc >= 0)
 310                         seq_printf(m, "%-16d", rc * mul_factor / div_factor);
 311                 else
 312                         seq_printf(m, "%-16s", "write-only");
 313                 seq_printf(m, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 314                 ds = setting->setting;
 315                 if (ds->get)
 316                         seq_printf(m, "r");
 317                 if (ds->set)
 318                         seq_printf(m, "w");
 319                 seq_printf(m, "\n");
 320         }
 321         mutex_unlock(&ide_setting_mtx);
 322         return 0;
 323 }
 324
 325 static int ide_settings_proc_open(struct inode *inode, struct file *file)
 326 {
 327         return single_open(file, ide_settings_proc_show, PDE(inode)->data);
 328 }
 329
 330 #define MAX_LEN 30
 331
 332 static ssize_t ide_settings_proc_write(struct file *file, const char __user *buffer,
 333                                        size_t count, loff_t *pos)
 334 {
 335         ide_drive_t     *drive = (ide_drive_t *) PDE(file->f_path.dentry->d_inode)->data;
 336         char            name[MAX_LEN + 1];
 337         int             for_real = 0, mul_factor, div_factor;
 338         unsigned long   n;
 339
 340         const struct ide_proc_devset *setting;
 341         char *buf, *s;
 342
 343         if (!capable(CAP_SYS_ADMIN))
 344                 return -EACCES;
 345
 346         proc_ide_settings_warn();
 347
 348         if (count >= PAGE_SIZE)
 349                 return -EINVAL;
 350
 351         s = buf = (char *)__get_free_page(GFP_USER);
 352         if (!buf)
 353                 return -ENOMEM;
 354
 355         if (copy_from_user(buf, buffer, count)) {
 356                 free_page((unsigned long)buf);
 357                 return -EFAULT;
 358         }
 359
 360         buf[count] = '\0';
 361
 362         /*
 363          * Skip over leading whitespace
 364          */
 365         while (count && isspace(*s)) {
 366                 --count;
 367                 ++s;
 368         }
 369         /*
 370          * Do one full pass to verify all parameters,
 371          * then do another to actually write the new settings.
 372          */
 373         do {
 374                 char *p = s;
 375                 n = count;
 376                 while (n > 0) {
 377                         unsigned val;
 378                         char *q = p;
 379
 380                         while (n > 0 && *p != ':') {
 381                                 --n;
 382                                 p++;
 383                         }
 384                         if (*p != ':')
 385                                 goto parse_error;
 386                         if (p - q > MAX_LEN)
 387                                 goto parse_error;
 388                         memcpy(name, q, p - q);
 389                         name[p - q] = 0;
 390
 391                         if (n > 0) {
 392                                 --n;
 393                                 p++;
 394                         } else
 395                                 goto parse_error;
 396
 397                         val = simple_strtoul(p, &q, 10);
 398                         n -= q - p;
 399                         p = q;
 400                         if (n > 0 && !isspace(*p))
 401                                 goto parse_error;
 402                         while (n > 0 && isspace(*p)) {
 403                                 --n;
 404                                 ++p;
 405                         }
 406
 407                         mutex_lock(&ide_setting_mtx);
 408                         /* generic settings first, then driver specific ones */
 409                         setting = ide_find_setting(ide_generic_settings, name);
 410                         if (!setting) {
 411                                 if (drive->settings)
 412                                         setting = ide_find_setting(drive->settings, name);
 413                                 if (!setting) {
 414                                         mutex_unlock(&ide_setting_mtx);
 415                                         goto parse_error;
 416                                 }
 417                         }
 418                         if (for_real) {
 419                                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 420                                 div_factor = setting->divf ? setting->divf(drive) : 1;
 421                                 ide_write_setting(drive, setting, val * div_factor / mul_factor);
 422                         }
 423                         mutex_unlock(&ide_setting_mtx);
 424                 }
 425         } while (!for_real++);
 426         free_page((unsigned long)buf);
 427         return count;
 428 parse_error:
 429         free_page((unsigned long)buf);
 430         printk("%s(): parse error\n", __func__);
 431         return -EINVAL;
 432 }
 433
 434 static const struct file_operations ide_settings_proc_fops = {
 435         .owner          = THIS_MODULE,
 436         .open           = ide_settings_proc_open,
 437         .read           = seq_read,
 438         .llseek         = seq_lseek,
 439         .release        = single_release,
 440         .write          = ide_settings_proc_write,
 441 };
 442
 443 static int ide_capacity_proc_show(struct seq_file *m, void *v)
 444 {
 445         seq_printf(m, "%llu\n", (long long)0x7fffffff);
 446         return 0;
 447 }
 448
 449 static int ide_capacity_proc_open(struct inode *inode, struct file *file)
 450 {
 451         return single_open(file, ide_capacity_proc_show, NULL);
 452 }
 453
 454 const struct file_operations ide_capacity_proc_fops = {
 455         .owner          = THIS_MODULE,
 456         .open           = ide_capacity_proc_open,
 457         .read           = seq_read,
 458         .llseek         = seq_lseek,
 459         .release        = single_release,
 460 };
 461 EXPORT_SYMBOL_GPL(ide_capacity_proc_fops);
 462
 463 static int ide_geometry_proc_show(struct seq_file *m, void *v)
 464 {
 465         ide_drive_t     *drive = (ide_drive_t *) m->private;
 466
 467         seq_printf(m, "physical     %d/%d/%d\n",
 468                         drive->cyl, drive->head, drive->sect);
 469         seq_printf(m, "logical      %d/%d/%d\n",
 470                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 471         return 0;
 472 }
 473
 474 static int ide_geometry_proc_open(struct inode *inode, struct file *file)
 475 {
 476         return single_open(file, ide_geometry_proc_show, PDE(inode)->data);
 477 }
 478
 479 const struct file_operations ide_geometry_proc_fops = {
 480         .owner          = THIS_MODULE,
 481         .open           = ide_geometry_proc_open,
 482         .read           = seq_read,
 483         .llseek         = seq_lseek,
 484         .release        = single_release,
 485 };
 486 EXPORT_SYMBOL(ide_geometry_proc_fops);
 487
 488 static int ide_dmodel_proc_show(struct seq_file *seq, void *v)
 489 {
 490         ide_drive_t     *drive = (ide_drive_t *) seq->private;
 491         char            *m = (char *)&drive->id[ATA_ID_PROD];
 492
 493         seq_printf(seq, "%.40s\n", m[0] ? m : "(none)");
 494         return 0;
 495 }
 496
 497 static int ide_dmodel_proc_open(struct inode *inode, struct file *file)
 498 {
 499         return single_open(file, ide_dmodel_proc_show, PDE(inode)->data);
 500 }
 501
 502 static const struct file_operations ide_dmodel_proc_fops = {
 503         .owner          = THIS_MODULE,
 504         .open           = ide_dmodel_proc_open,
 505         .read           = seq_read,
 506         .llseek         = seq_lseek,
 507         .release        = single_release,
 508 };
 509
 510 static int ide_driver_proc_show(struct seq_file *m, void *v)
 511 {
 512         ide_drive_t             *drive = (ide_drive_t *)m->private;
 513         struct device           *dev = &drive->gendev;
 514         struct ide_driver       *ide_drv;
 515
 516         if (dev->driver) {
 517                 ide_drv = to_ide_driver(dev->driver);
 518                 seq_printf(m, "%s version %s\n",
 519                                 dev->driver->name, ide_drv->version);
 520         } else
 521                 seq_printf(m, "ide-default version 0.9.newide\n");
 522         return 0;
 523 }
 524
 525 static int ide_driver_proc_open(struct inode *inode, struct file *file)
 526 {
 527         return single_open(file, ide_driver_proc_show, PDE(inode)->data);
 528 }
 529
 530 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 531 {
 532         struct device *dev = &drive->gendev;
 533         int ret = 1;
 534         int err;
 535
 536         device_release_driver(dev);
 537         /* FIXME: device can still be in use by previous driver */
 538         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 539         err = device_attach(dev);
 540         if (err < 0)
 541                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 542                         __func__, err);
 543         drive->driver_req[0] = 0;
 544         if (dev->driver == NULL) {
 545                 err = device_attach(dev);
 546                 if (err < 0)
 547                         printk(KERN_WARNING
 548                                 "IDE: %s: device_attach(2) error: %d\n",
 549                                 __func__, err);
 550         }
 551         if (dev->driver && !strcmp(dev->driver->name, driver))
 552                 ret = 0;
 553
 554         return ret;
 555 }
 556
 557 static ssize_t ide_driver_proc_write(struct file *file, const char __user *buffer,
 558                                      size_t count, loff_t *pos)
 559 {
 560         ide_drive_t     *drive = (ide_drive_t *) PDE(file->f_path.dentry->d_inode)->data;
 561         char name[32];
 562
 563         if (!capable(CAP_SYS_ADMIN))
 564                 return -EACCES;
 565         if (count > 31)
 566                 count = 31;
 567         if (copy_from_user(name, buffer, count))
 568                 return -EFAULT;
 569         name[count] = '\0';
 570         if (ide_replace_subdriver(drive, name))
 571                 return -EINVAL;
 572         return count;
 573 }
 574
 575 static const struct file_operations ide_driver_proc_fops = {
 576         .owner          = THIS_MODULE,
 577         .open           = ide_driver_proc_open,
 578         .read           = seq_read,
 579         .llseek         = seq_lseek,
 580         .release        = single_release,
 581         .write          = ide_driver_proc_write,
 582 };
 583
 584 static int ide_media_proc_show(struct seq_file *m, void *v)
 585 {
 586         ide_drive_t     *drive = (ide_drive_t *) m->private;
 587         const char      *media;
 588
 589         switch (drive->media) {
 590         case ide_disk:          media = "disk\n";       break;
 591         case ide_cdrom:         media = "cdrom\n";      break;
 592         case ide_tape:          media = "tape\n";       break;
 593         case ide_floppy:        media = "floppy\n";     break;
 594         case ide_optical:       media = "optical\n";    break;
 595         default:                media = "UNKNOWN\n";    break;
 596         }
 597         seq_puts(m, media);
 598         return 0;
 599 }
 600
 601 static int ide_media_proc_open(struct inode *inode, struct file *file)
 602 {
 603         return single_open(file, ide_media_proc_show, PDE(inode)->data);
 604 }
 605
 606 static const struct file_operations ide_media_proc_fops = {
 607         .owner          = THIS_MODULE,
 608         .open           = ide_media_proc_open,
 609         .read           = seq_read,
 610         .llseek         = seq_lseek,
 611         .release        = single_release,
 612 };
 613
 614 static ide_proc_entry_t generic_drive_entries[] = {
 615         { "driver",     S_IFREG|S_IRUGO,         &ide_driver_proc_fops  },
 616         { "identify",   S_IFREG|S_IRUSR,         &ide_identify_proc_fops},
 617         { "media",      S_IFREG|S_IRUGO,         &ide_media_proc_fops   },
 618         { "model",      S_IFREG|S_IRUGO,         &ide_dmodel_proc_fops  },
 619         { "settings",   S_IFREG|S_IRUSR|S_IWUSR, &ide_settings_proc_fops},
 620         {}
 621 };
 622
 623 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 624 {
 625         struct proc_dir_entry *ent;
 626
 627         if (!dir || !p)
 628                 return;
 629         while (p->name != NULL) {
 630                 ent = proc_create_data(p->name, p->mode, dir, p->proc_fops, data);
 631                 if (!ent) return;
 632                 p++;
 633         }
 634 }
 635
 636 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 637 {
 638         if (!dir || !p)
 639                 return;
 640         while (p->name != NULL) {
 641                 remove_proc_entry(p->name, dir);
 642                 p++;
 643         }
 644 }
 645
 646 void ide_proc_register_driver(ide_drive_t *drive, struct ide_driver *driver)
 647 {
 648         mutex_lock(&ide_setting_mtx);
 649         drive->settings = driver->proc_devsets(drive);
 650         mutex_unlock(&ide_setting_mtx);
 651
 652         ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive);
 653 }
 654
 655 EXPORT_SYMBOL(ide_proc_register_driver);
 656
 657 /**
 658  *      ide_proc_unregister_driver      -       remove driver specific data
 659  *      @drive: drive
 660  *      @driver: driver
 661  *
 662  *      Clean up the driver specific /proc files and IDE settings
 663  *      for a given drive.
 664  *
 665  *      Takes ide_setting_mtx.
 666  */
 667
 668 void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver)
 669 {
 670         ide_remove_proc_entries(drive->proc, driver->proc_entries(drive));
 671
 672         mutex_lock(&ide_setting_mtx);
 673         /*
 674          * ide_setting_mtx protects both the settings list and the use
 675          * of settings (we cannot take a setting out that is being used).
 676          */
 677         drive->settings = NULL;
 678         mutex_unlock(&ide_setting_mtx);
 679 }
 680 EXPORT_SYMBOL(ide_proc_unregister_driver);
 681
 682 void ide_proc_port_register_devices(ide_hwif_t *hwif)
 683 {
 684         struct proc_dir_entry *ent;
 685         struct proc_dir_entry *parent = hwif->proc;
 686         ide_drive_t *drive;
 687         char name[64];
 688         int i;
 689
 690         ide_port_for_each_dev(i, drive, hwif) {
 691                 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
 692                         continue;
 693
 694                 drive->proc = proc_mkdir(drive->name, parent);
 695                 if (drive->proc)
 696                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 697                 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 698                 ent = proc_symlink(drive->name, proc_ide_root, name);
 699                 if (!ent) return;
 700         }
 701 }
 702
 703 void ide_proc_unregister_device(ide_drive_t *drive)
 704 {
 705         if (drive->proc) {
 706                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 707                 remove_proc_entry(drive->name, proc_ide_root);
 708                 remove_proc_entry(drive->name, drive->hwif->proc);
 709                 drive->proc = NULL;
 710         }
 711 }
 712
 713 static ide_proc_entry_t hwif_entries[] = {
 714         { "channel",    S_IFREG|S_IRUGO,        &ide_channel_proc_fops  },
 715         { "mate",       S_IFREG|S_IRUGO,        &ide_mate_proc_fops     },
 716         { "model",      S_IFREG|S_IRUGO,        &ide_imodel_proc_fops   },
 717         {}
 718 };
 719
 720 void ide_proc_register_port(ide_hwif_t *hwif)
 721 {
 722         if (!hwif->proc) {
 723                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 724
 725                 if (!hwif->proc)
 726                         return;
 727
 728                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 729         }
 730 }
 731
 732 void ide_proc_unregister_port(ide_hwif_t *hwif)
 733 {
 734         if (hwif->proc) {
 735                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 736                 remove_proc_entry(hwif->name, proc_ide_root);
 737                 hwif->proc = NULL;
 738         }
 739 }
 740
 741 static int proc_print_driver(struct device_driver *drv, void *data)
 742 {
 743         struct ide_driver *ide_drv = to_ide_driver(drv);
 744         struct seq_file *s = data;
 745
 746         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 747
 748         return 0;
 749 }
 750
 751 static int ide_drivers_show(struct seq_file *s, void *p)
 752 {
 753         int err;
 754
 755         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 756         if (err < 0)
 757                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 758                         __func__, err);
 759         return 0;
 760 }
 761
 762 static int ide_drivers_open(struct inode *inode, struct file *file)
 763 {
 764         return single_open(file, &ide_drivers_show, NULL);
 765 }
 766
 767 static const struct file_operations ide_drivers_operations = {
 768         .owner          = THIS_MODULE,
 769         .open           = ide_drivers_open,
 770         .read           = seq_read,
 771         .llseek         = seq_lseek,
 772         .release        = single_release,
 773 };
 774
 775 void proc_ide_create(void)
 776 {
 777         proc_ide_root = proc_mkdir("ide", NULL);
 778
 779         if (!proc_ide_root)
 780                 return;
 781
 782         proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
 783 }
 784
 785 void proc_ide_destroy(void)
 786 {
 787         remove_proc_entry("drivers", proc_ide_root);
 788         remove_proc_entry("ide", NULL);
 789 }