Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6
[linux-2.6.git] / 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 }