release/src-rt-6.x.4708/linux/linux-2.6.36/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 #include <linux/slab.h>
  29
  30 #include <asm/io.h>
  31
  32 static struct proc_dir_entry *proc_ide_root;
  33
  34 static int ide_imodel_proc_show(struct seq_file *m, void *v)
  35 {
  36         ide_hwif_t      *hwif = (ide_hwif_t *) m->private;
  37         const char      *name;
  38
  39         switch (hwif->chipset) {
  40         case ide_generic:       name = "generic";       break;
  41         case ide_pci:           name = "pci";           break;
  42         case ide_cmd640:        name = "cmd640";        break;
  43         case ide_dtc2278:       name = "dtc2278";       break;
  44         case ide_ali14xx:       name = "ali14xx";       break;
  45         case ide_qd65xx:        name = "qd65xx";        break;
  46         case ide_umc8672:       name = "umc8672";       break;
  47         case ide_ht6560b:       name = "ht6560b";       break;
  48         case ide_4drives:       name = "4drives";       break;
  49         case ide_pmac:          name = "mac-io";        break;
  50         case ide_au1xxx:        name = "au1xxx";        break;
  51         case ide_palm3710:      name = "palm3710";      break;
  52         case ide_acorn:         name = "acorn";         break;
  53         default:                name = "(unknown)";     break;
  54         }
  55         seq_printf(m, "%s\n", name);
  56         return 0;
  57 }
  58
  59 static int ide_imodel_proc_open(struct inode *inode, struct file *file)
  60 {
  61         return single_open(file, ide_imodel_proc_show, PDE(inode)->data);
  62 }
  63
  64 static const struct file_operations ide_imodel_proc_fops = {
  65         .owner          = THIS_MODULE,
  66         .open           = ide_imodel_proc_open,
  67         .read           = seq_read,
  68         .llseek         = seq_lseek,
  69         .release        = single_release,
  70 };
  71
  72 static int ide_mate_proc_show(struct seq_file *m, void *v)
  73 {
  74         ide_hwif_t      *hwif = (ide_hwif_t *) m->private;
  75
  76         if (hwif && hwif->mate)
  77                 seq_printf(m, "%s\n", hwif->mate->name);
  78         else
  79                 seq_printf(m, "(none)\n");
  80         return 0;
  81 }
  82
  83 static int ide_mate_proc_open(struct inode *inode, struct file *file)
  84 {
  85         return single_open(file, ide_mate_proc_show, PDE(inode)->data);
  86 }
  87
  88 static const struct file_operations ide_mate_proc_fops = {
  89         .owner          = THIS_MODULE,
  90         .open           = ide_mate_proc_open,
  91         .read           = seq_read,
  92         .llseek         = seq_lseek,
  93         .release        = single_release,
  94 };
  95
  96 static int ide_channel_proc_show(struct seq_file *m, void *v)
  97 {
  98         ide_hwif_t      *hwif = (ide_hwif_t *) m->private;
  99
 100         seq_printf(m, "%c\n", hwif->channel ? '1' : '0');
 101         return 0;
 102 }
 103
 104 static int ide_channel_proc_open(struct inode *inode, struct file *file)
 105 {
 106         return single_open(file, ide_channel_proc_show, PDE(inode)->data);
 107 }
 108
 109 static const struct file_operations ide_channel_proc_fops = {
 110         .owner          = THIS_MODULE,
 111         .open           = ide_channel_proc_open,
 112         .read           = seq_read,
 113         .llseek         = seq_lseek,
 114         .release        = single_release,
 115 };
 116
 117 static int ide_identify_proc_show(struct seq_file *m, void *v)
 118 {
 119         ide_drive_t *drive = (ide_drive_t *)m->private;
 120         u8 *buf;
 121
 122         if (!drive) {
 123                 seq_putc(m, '\n');
 124                 return 0;
 125         }
 126
 127         buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
 128         if (!buf)
 129                 return -ENOMEM;
 130         if (taskfile_lib_get_identify(drive, buf) == 0) {
 131                 __le16 *val = (__le16 *)buf;
 132                 int i;
 133
 134                 for (i = 0; i < SECTOR_SIZE / 2; i++) {
 135                         seq_printf(m, "%04x%c", le16_to_cpu(val[i]),
 136                                         (i % 8) == 7 ? '\n' : ' ');
 137                 }
 138         } else
 139                 seq_putc(m, buf[0]);
 140         kfree(buf);
 141         return 0;
 142 }
 143
 144 static int ide_identify_proc_open(struct inode *inode, struct file *file)
 145 {
 146         return single_open(file, ide_identify_proc_show, PDE(inode)->data);
 147 }
 148
 149 static const struct file_operations ide_identify_proc_fops = {
 150         .owner          = THIS_MODULE,
 151         .open           = ide_identify_proc_open,
 152         .read           = seq_read,
 153         .llseek         = seq_lseek,
 154         .release        = single_release,
 155 };
 156
 157 /**
 158  *      ide_find_setting        -       find a specific setting
 159  *      @st: setting table pointer
 160  *      @name: setting name
 161  *
 162  *      Scan's the setting table for a matching entry and returns
 163  *      this or NULL if no entry is found. The caller must hold the
 164  *      setting semaphore
 165  */
 166
 167 static
 168 const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st,
 169                                                char *name)
 170 {
 171         while (st->name) {
 172                 if (strcmp(st->name, name) == 0)
 173                         break;
 174                 st++;
 175         }
 176         return st->name ? st : NULL;
 177 }
 178
 179 /**
 180  *      ide_read_setting        -       read an IDE setting
 181  *      @drive: drive to read from
 182  *      @setting: drive setting
 183  *
 184  *      Read a drive setting and return the value. The caller
 185  *      must hold the ide_setting_mtx when making this call.
 186  *
 187  *      BUGS: the data return and error are the same return value
 188  *      so an error -EINVAL and true return of the same value cannot
 189  *      be told apart
 190  */
 191
 192 static int ide_read_setting(ide_drive_t *drive,
 193                             const struct ide_proc_devset *setting)
 194 {
 195         const struct ide_devset *ds = setting->setting;
 196         int val = -EINVAL;
 197
 198         if (ds->get)
 199                 val = ds->get(drive);
 200
 201         return val;
 202 }
 203
 204
 205 static int ide_write_setting(ide_drive_t *drive,
 206                              const struct ide_proc_devset *setting, int val)
 207 {
 208         const struct ide_devset *ds = setting->setting;
 209
 210         if (!capable(CAP_SYS_ADMIN))
 211                 return -EACCES;
 212         if (!ds->set)
 213                 return -EPERM;
 214         if ((ds->flags & DS_SYNC)
 215             && (val < setting->min || val > setting->max))
 216                 return -EINVAL;
 217         return ide_devset_execute(drive, ds, val);
 218 }
 219
 220 ide_devset_get(xfer_rate, current_speed);
 221
 222 static int set_xfer_rate (ide_drive_t *drive, int arg)
 223 {
 224         struct ide_cmd cmd;
 225
 226         if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
 227                 return -EINVAL;
 228
 229         memset(&cmd, 0, sizeof(cmd));
 230         cmd.tf.command = ATA_CMD_SET_FEATURES;
 231         cmd.tf.feature = SETFEATURES_XFER;
 232         cmd.tf.nsect   = (u8)arg;
 233         cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT;
 234         cmd.valid.in.tf  = IDE_VALID_NSECT;
 235         cmd.tf_flags   = IDE_TFLAG_SET_XFER;
 236
 237         return ide_no_data_taskfile(drive, &cmd);
 238 }
 239
 240 ide_devset_rw(current_speed, xfer_rate);
 241 ide_devset_rw_field(init_speed, init_speed);
 242 ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1);
 243 ide_devset_rw_field(number, dn);
 244
 245 static const struct ide_proc_devset ide_generic_settings[] = {
 246         IDE_PROC_DEVSET(current_speed, 0, 70),
 247         IDE_PROC_DEVSET(init_speed, 0, 70),
 248         IDE_PROC_DEVSET(io_32bit,  0, 1 + (SUPPORT_VLB_SYNC << 1)),
 249         IDE_PROC_DEVSET(keepsettings, 0, 1),
 250         IDE_PROC_DEVSET(nice1, 0, 1),
 251         IDE_PROC_DEVSET(number, 0, 3),
 252         IDE_PROC_DEVSET(pio_mode, 0, 255),
 253         IDE_PROC_DEVSET(unmaskirq, 0, 1),
 254         IDE_PROC_DEVSET(using_dma, 0, 1),
 255         { NULL },
 256 };
 257
 258 static void proc_ide_settings_warn(void)
 259 {
 260         printk_once(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
 261                             "obsolete, and will be removed soon!\n");
 262 }
 263
 264 static int ide_settings_proc_show(struct seq_file *m, void *v)
 265 {
 266         const struct ide_proc_devset *setting, *g, *d;
 267         const struct ide_devset *ds;
 268         ide_drive_t     *drive = (ide_drive_t *) m->private;
 269         int             rc, mul_factor, div_factor;
 270
 271         proc_ide_settings_warn();
 272
 273         mutex_lock(&ide_setting_mtx);
 274         g = ide_generic_settings;
 275         d = drive->settings;
 276         seq_printf(m, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 277         seq_printf(m, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
 278         while (g->name || (d && d->name)) {
 279                 /* read settings in the alphabetical order */
 280                 if (g->name && d && d->name) {
 281                         if (strcmp(d->name, g->name) < 0)
 282                                 setting = d++;
 283                         else
 284                                 setting = g++;
 285                 } else if (d && d->name) {
 286                         setting = d++;
 287                 } else
 288                         setting = g++;
 289                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 290                 div_factor = setting->divf ? setting->divf(drive) : 1;
 291                 seq_printf(m, "%-24s", setting->name);
 292                 rc = ide_read_setting(drive, setting);
 293                 if (rc >= 0)
 294                         seq_printf(m, "%-16d", rc * mul_factor / div_factor);
 295                 else
 296                         seq_printf(m, "%-16s", "write-only");
 297                 seq_printf(m, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
 298                 ds = setting->setting;
 299                 if (ds->get)
 300                         seq_printf(m, "r");
 301                 if (ds->set)
 302                         seq_printf(m, "w");
 303                 seq_printf(m, "\n");
 304         }
 305         mutex_unlock(&ide_setting_mtx);
 306         return 0;
 307 }
 308
 309 static int ide_settings_proc_open(struct inode *inode, struct file *file)
 310 {
 311         return single_open(file, ide_settings_proc_show, PDE(inode)->data);
 312 }
 313
 314 #define MAX_LEN 30
 315
 316 static ssize_t ide_settings_proc_write(struct file *file, const char __user *buffer,
 317                                        size_t count, loff_t *pos)
 318 {
 319         ide_drive_t     *drive = (ide_drive_t *) PDE(file->f_path.dentry->d_inode)->data;
 320         char            name[MAX_LEN + 1];
 321         int             for_real = 0, mul_factor, div_factor;
 322         unsigned long   n;
 323
 324         const struct ide_proc_devset *setting;
 325         char *buf, *s;
 326
 327         if (!capable(CAP_SYS_ADMIN))
 328                 return -EACCES;
 329
 330         proc_ide_settings_warn();
 331
 332         if (count >= PAGE_SIZE)
 333                 return -EINVAL;
 334
 335         s = buf = (char *)__get_free_page(GFP_USER);
 336         if (!buf)
 337                 return -ENOMEM;
 338
 339         if (copy_from_user(buf, buffer, count)) {
 340                 free_page((unsigned long)buf);
 341                 return -EFAULT;
 342         }
 343
 344         buf[count] = '\0';
 345
 346         /*
 347          * Skip over leading whitespace
 348          */
 349         while (count && isspace(*s)) {
 350                 --count;
 351                 ++s;
 352         }
 353         /*
 354          * Do one full pass to verify all parameters,
 355          * then do another to actually write the new settings.
 356          */
 357         do {
 358                 char *p = s;
 359                 n = count;
 360                 while (n > 0) {
 361                         unsigned val;
 362                         char *q = p;
 363
 364                         while (n > 0 && *p != ':') {
 365                                 --n;
 366                                 p++;
 367                         }
 368                         if (*p != ':')
 369                                 goto parse_error;
 370                         if (p - q > MAX_LEN)
 371                                 goto parse_error;
 372                         memcpy(name, q, p - q);
 373                         name[p - q] = 0;
 374
 375                         if (n > 0) {
 376                                 --n;
 377                                 p++;
 378                         } else
 379                                 goto parse_error;
 380
 381                         val = simple_strtoul(p, &q, 10);
 382                         n -= q - p;
 383                         p = q;
 384                         if (n > 0 && !isspace(*p))
 385                                 goto parse_error;
 386                         while (n > 0 && isspace(*p)) {
 387                                 --n;
 388                                 ++p;
 389                         }
 390
 391                         mutex_lock(&ide_setting_mtx);
 392                         /* generic settings first, then driver specific ones */
 393                         setting = ide_find_setting(ide_generic_settings, name);
 394                         if (!setting) {
 395                                 if (drive->settings)
 396                                         setting = ide_find_setting(drive->settings, name);
 397                                 if (!setting) {
 398                                         mutex_unlock(&ide_setting_mtx);
 399                                         goto parse_error;
 400                                 }
 401                         }
 402                         if (for_real) {
 403                                 mul_factor = setting->mulf ? setting->mulf(drive) : 1;
 404                                 div_factor = setting->divf ? setting->divf(drive) : 1;
 405                                 ide_write_setting(drive, setting, val * div_factor / mul_factor);
 406                         }
 407                         mutex_unlock(&ide_setting_mtx);
 408                 }
 409         } while (!for_real++);
 410         free_page((unsigned long)buf);
 411         return count;
 412 parse_error:
 413         free_page((unsigned long)buf);
 414         printk("%s(): parse error\n", __func__);
 415         return -EINVAL;
 416 }
 417
 418 static const struct file_operations ide_settings_proc_fops = {
 419         .owner          = THIS_MODULE,
 420         .open           = ide_settings_proc_open,
 421         .read           = seq_read,
 422         .llseek         = seq_lseek,
 423         .release        = single_release,
 424         .write          = ide_settings_proc_write,
 425 };
 426
 427 static int ide_capacity_proc_show(struct seq_file *m, void *v)
 428 {
 429         seq_printf(m, "%llu\n", (long long)0x7fffffff);
 430         return 0;
 431 }
 432
 433 static int ide_capacity_proc_open(struct inode *inode, struct file *file)
 434 {
 435         return single_open(file, ide_capacity_proc_show, NULL);
 436 }
 437
 438 const struct file_operations ide_capacity_proc_fops = {
 439         .owner          = THIS_MODULE,
 440         .open           = ide_capacity_proc_open,
 441         .read           = seq_read,
 442         .llseek         = seq_lseek,
 443         .release        = single_release,
 444 };
 445 EXPORT_SYMBOL_GPL(ide_capacity_proc_fops);
 446
 447 static int ide_geometry_proc_show(struct seq_file *m, void *v)
 448 {
 449         ide_drive_t     *drive = (ide_drive_t *) m->private;
 450
 451         seq_printf(m, "physical     %d/%d/%d\n",
 452                         drive->cyl, drive->head, drive->sect);
 453         seq_printf(m, "logical      %d/%d/%d\n",
 454                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
 455         return 0;
 456 }
 457
 458 static int ide_geometry_proc_open(struct inode *inode, struct file *file)
 459 {
 460         return single_open(file, ide_geometry_proc_show, PDE(inode)->data);
 461 }
 462
 463 const struct file_operations ide_geometry_proc_fops = {
 464         .owner          = THIS_MODULE,
 465         .open           = ide_geometry_proc_open,
 466         .read           = seq_read,
 467         .llseek         = seq_lseek,
 468         .release        = single_release,
 469 };
 470 EXPORT_SYMBOL(ide_geometry_proc_fops);
 471
 472 static int ide_dmodel_proc_show(struct seq_file *seq, void *v)
 473 {
 474         ide_drive_t     *drive = (ide_drive_t *) seq->private;
 475         char            *m = (char *)&drive->id[ATA_ID_PROD];
 476
 477         seq_printf(seq, "%.40s\n", m[0] ? m : "(none)");
 478         return 0;
 479 }
 480
 481 static int ide_dmodel_proc_open(struct inode *inode, struct file *file)
 482 {
 483         return single_open(file, ide_dmodel_proc_show, PDE(inode)->data);
 484 }
 485
 486 static const struct file_operations ide_dmodel_proc_fops = {
 487         .owner          = THIS_MODULE,
 488         .open           = ide_dmodel_proc_open,
 489         .read           = seq_read,
 490         .llseek         = seq_lseek,
 491         .release        = single_release,
 492 };
 493
 494 static int ide_driver_proc_show(struct seq_file *m, void *v)
 495 {
 496         ide_drive_t             *drive = (ide_drive_t *)m->private;
 497         struct device           *dev = &drive->gendev;
 498         struct ide_driver       *ide_drv;
 499
 500         if (dev->driver) {
 501                 ide_drv = to_ide_driver(dev->driver);
 502                 seq_printf(m, "%s version %s\n",
 503                                 dev->driver->name, ide_drv->version);
 504         } else
 505                 seq_printf(m, "ide-default version 0.9.newide\n");
 506         return 0;
 507 }
 508
 509 static int ide_driver_proc_open(struct inode *inode, struct file *file)
 510 {
 511         return single_open(file, ide_driver_proc_show, PDE(inode)->data);
 512 }
 513
 514 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
 515 {
 516         struct device *dev = &drive->gendev;
 517         int ret = 1;
 518         int err;
 519
 520         device_release_driver(dev);
 521         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
 522         err = device_attach(dev);
 523         if (err < 0)
 524                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
 525                         __func__, err);
 526         drive->driver_req[0] = 0;
 527         if (dev->driver == NULL) {
 528                 err = device_attach(dev);
 529                 if (err < 0)
 530                         printk(KERN_WARNING
 531                                 "IDE: %s: device_attach(2) error: %d\n",
 532                                 __func__, err);
 533         }
 534         if (dev->driver && !strcmp(dev->driver->name, driver))
 535                 ret = 0;
 536
 537         return ret;
 538 }
 539
 540 static ssize_t ide_driver_proc_write(struct file *file, const char __user *buffer,
 541                                      size_t count, loff_t *pos)
 542 {
 543         ide_drive_t     *drive = (ide_drive_t *) PDE(file->f_path.dentry->d_inode)->data;
 544         char name[32];
 545
 546         if (!capable(CAP_SYS_ADMIN))
 547                 return -EACCES;
 548         if (count > 31)
 549                 count = 31;
 550         if (copy_from_user(name, buffer, count))
 551                 return -EFAULT;
 552         name[count] = '\0';
 553         if (ide_replace_subdriver(drive, name))
 554                 return -EINVAL;
 555         return count;
 556 }
 557
 558 static const struct file_operations ide_driver_proc_fops = {
 559         .owner          = THIS_MODULE,
 560         .open           = ide_driver_proc_open,
 561         .read           = seq_read,
 562         .llseek         = seq_lseek,
 563         .release        = single_release,
 564         .write          = ide_driver_proc_write,
 565 };
 566
 567 static int ide_media_proc_show(struct seq_file *m, void *v)
 568 {
 569         ide_drive_t     *drive = (ide_drive_t *) m->private;
 570         const char      *media;
 571
 572         switch (drive->media) {
 573         case ide_disk:          media = "disk\n";       break;
 574         case ide_cdrom:         media = "cdrom\n";      break;
 575         case ide_tape:          media = "tape\n";       break;
 576         case ide_floppy:        media = "floppy\n";     break;
 577         case ide_optical:       media = "optical\n";    break;
 578         default:                media = "UNKNOWN\n";    break;
 579         }
 580         seq_puts(m, media);
 581         return 0;
 582 }
 583
 584 static int ide_media_proc_open(struct inode *inode, struct file *file)
 585 {
 586         return single_open(file, ide_media_proc_show, PDE(inode)->data);
 587 }
 588
 589 static const struct file_operations ide_media_proc_fops = {
 590         .owner          = THIS_MODULE,
 591         .open           = ide_media_proc_open,
 592         .read           = seq_read,
 593         .llseek         = seq_lseek,
 594         .release        = single_release,
 595 };
 596
 597 static ide_proc_entry_t generic_drive_entries[] = {
 598         { "driver",     S_IFREG|S_IRUGO,         &ide_driver_proc_fops  },
 599         { "identify",   S_IFREG|S_IRUSR,         &ide_identify_proc_fops},
 600         { "media",      S_IFREG|S_IRUGO,         &ide_media_proc_fops   },
 601         { "model",      S_IFREG|S_IRUGO,         &ide_dmodel_proc_fops  },
 602         { "settings",   S_IFREG|S_IRUSR|S_IWUSR, &ide_settings_proc_fops},
 603         {}
 604 };
 605
 606 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 607 {
 608         struct proc_dir_entry *ent;
 609
 610         if (!dir || !p)
 611                 return;
 612         while (p->name != NULL) {
 613                 ent = proc_create_data(p->name, p->mode, dir, p->proc_fops, data);
 614                 if (!ent) return;
 615                 p++;
 616         }
 617 }
 618
 619 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 620 {
 621         if (!dir || !p)
 622                 return;
 623         while (p->name != NULL) {
 624                 remove_proc_entry(p->name, dir);
 625                 p++;
 626         }
 627 }
 628
 629 void ide_proc_register_driver(ide_drive_t *drive, struct ide_driver *driver)
 630 {
 631         mutex_lock(&ide_setting_mtx);
 632         drive->settings = driver->proc_devsets(drive);
 633         mutex_unlock(&ide_setting_mtx);
 634
 635         ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive);
 636 }
 637
 638 EXPORT_SYMBOL(ide_proc_register_driver);
 639
 640 /**
 641  *      ide_proc_unregister_driver      -       remove driver specific data
 642  *      @drive: drive
 643  *      @driver: driver
 644  *
 645  *      Clean up the driver specific /proc files and IDE settings
 646  *      for a given drive.
 647  *
 648  *      Takes ide_setting_mtx.
 649  */
 650
 651 void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver)
 652 {
 653         ide_remove_proc_entries(drive->proc, driver->proc_entries(drive));
 654
 655         mutex_lock(&ide_setting_mtx);
 656         /*
 657          * ide_setting_mtx protects both the settings list and the use
 658          * of settings (we cannot take a setting out that is being used).
 659          */
 660         drive->settings = NULL;
 661         mutex_unlock(&ide_setting_mtx);
 662 }
 663 EXPORT_SYMBOL(ide_proc_unregister_driver);
 664
 665 void ide_proc_port_register_devices(ide_hwif_t *hwif)
 666 {
 667         struct proc_dir_entry *ent;
 668         struct proc_dir_entry *parent = hwif->proc;
 669         ide_drive_t *drive;
 670         char name[64];
 671         int i;
 672
 673         ide_port_for_each_dev(i, drive, hwif) {
 674                 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
 675                         continue;
 676
 677                 drive->proc = proc_mkdir(drive->name, parent);
 678                 if (drive->proc)
 679                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 680                 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 681                 ent = proc_symlink(drive->name, proc_ide_root, name);
 682                 if (!ent) return;
 683         }
 684 }
 685
 686 void ide_proc_unregister_device(ide_drive_t *drive)
 687 {
 688         if (drive->proc) {
 689                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
 690                 remove_proc_entry(drive->name, proc_ide_root);
 691                 remove_proc_entry(drive->name, drive->hwif->proc);
 692                 drive->proc = NULL;
 693         }
 694 }
 695
 696 static ide_proc_entry_t hwif_entries[] = {
 697         { "channel",    S_IFREG|S_IRUGO,        &ide_channel_proc_fops  },
 698         { "mate",       S_IFREG|S_IRUGO,        &ide_mate_proc_fops     },
 699         { "model",      S_IFREG|S_IRUGO,        &ide_imodel_proc_fops   },
 700         {}
 701 };
 702
 703 void ide_proc_register_port(ide_hwif_t *hwif)
 704 {
 705         if (!hwif->proc) {
 706                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 707
 708                 if (!hwif->proc)
 709                         return;
 710
 711                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 712         }
 713 }
 714
 715 void ide_proc_unregister_port(ide_hwif_t *hwif)
 716 {
 717         if (hwif->proc) {
 718                 ide_remove_proc_entries(hwif->proc, hwif_entries);
 719                 remove_proc_entry(hwif->name, proc_ide_root);
 720                 hwif->proc = NULL;
 721         }
 722 }
 723
 724 static int proc_print_driver(struct device_driver *drv, void *data)
 725 {
 726         struct ide_driver *ide_drv = to_ide_driver(drv);
 727         struct seq_file *s = data;
 728
 729         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
 730
 731         return 0;
 732 }
 733
 734 static int ide_drivers_show(struct seq_file *s, void *p)
 735 {
 736         int err;
 737
 738         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
 739         if (err < 0)
 740                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
 741                         __func__, err);
 742         return 0;
 743 }
 744
 745 static int ide_drivers_open(struct inode *inode, struct file *file)
 746 {
 747         return single_open(file, &ide_drivers_show, NULL);
 748 }
 749
 750 static const struct file_operations ide_drivers_operations = {
 751         .owner          = THIS_MODULE,
 752         .open           = ide_drivers_open,
 753         .read           = seq_read,
 754         .llseek         = seq_lseek,
 755         .release        = single_release,
 756 };
 757
 758 void proc_ide_create(void)
 759 {
 760         proc_ide_root = proc_mkdir("ide", NULL);
 761
 762         if (!proc_ide_root)
 763                 return;
 764
 765         proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
 766 }
 767
 768 void proc_ide_destroy(void)
 769 {
 770         remove_proc_entry("drivers", proc_ide_root);
 771         remove_proc_entry("ide", NULL);
 772 }