ide-proc.c revision 01f1afaf7b77a16198e65e909e3c410c036eb0d0
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 31static struct proc_dir_entry *proc_ide_root; 32 33static 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 58static 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 63static 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 71static 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 82static 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 87static 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 95static 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 103static 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 108static 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 116static 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 143static 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 148static 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 166static 167const 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 191static 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 221static 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 236ide_devset_get(xfer_rate, current_speed); 237 238static 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 256ide_devset_rw(current_speed, xfer_rate); 257ide_devset_rw_field(init_speed, init_speed); 258ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1); 259ide_devset_rw_field(number, dn); 260 261static 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 274static 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 280static 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 325static 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 332static 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; 428parse_error: 429 free_page((unsigned long)buf); 430 printk("%s(): parse error\n", __func__); 431 return -EINVAL; 432} 433 434static 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 443static 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 449static int ide_capacity_proc_open(struct inode *inode, struct file *file) 450{ 451 return single_open(file, ide_capacity_proc_show, NULL); 452} 453 454const 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}; 461EXPORT_SYMBOL_GPL(ide_capacity_proc_fops); 462 463static 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 474static 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 479const 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}; 486EXPORT_SYMBOL(ide_geometry_proc_fops); 487 488static 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 497static 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 502static 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 510static 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 525static 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 530static 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 557static 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 575static 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 584static 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 601static 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 606static 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 614static 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 623static 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 636static 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 646void 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 655EXPORT_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 668void 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} 680EXPORT_SYMBOL(ide_proc_unregister_driver); 681 682void 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 703void 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 713static 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 720void 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 732void 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 741static 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 751static 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 762static int ide_drivers_open(struct inode *inode, struct file *file) 763{ 764 return single_open(file, &ide_drivers_show, NULL); 765} 766 767static 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 775void 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 785void proc_ide_destroy(void) 786{ 787 remove_proc_entry("drivers", proc_ide_root); 788 remove_proc_entry("ide", NULL); 789} 790