Merge branch 'linux-2.6'
[linux-2.6] / drivers / ide / ide-proc.c
1 /*
2  *  linux/drivers/ide/ide-proc.c        Version 1.05    Mar 05, 2003
3  *
4  *  Copyright (C) 1997-1998     Mark Lord
5  *  Copyright (C) 2003          Red Hat <alan@redhat.com>
6  *
7  *  Some code was moved here from ide.c, see it for original copyrights.
8  */
9
10 /*
11  * This is the /proc/ide/ filesystem implementation.
12  *
13  * Drive/Driver settings can be retrieved by reading the drive's
14  * "settings" files.  e.g.    "cat /proc/ide0/hda/settings"
15  * To write a new value "val" into a specific setting "name", use:
16  *   echo "name:val" >/proc/ide/ide0/hda/settings
17  *
18  * Also useful, "cat /proc/ide0/hda/[identify, smart_values,
19  * smart_thresholds, capabilities]" will issue an IDENTIFY /
20  * PACKET_IDENTIFY / SMART_READ_VALUES / SMART_READ_THRESHOLDS /
21  * SENSE CAPABILITIES command to /dev/hda, and then dump out the
22  * returned data as 256 16-bit words.  The "hdparm" utility will
23  * be updated someday soon to use this mechanism.
24  *
25  */
26
27 #include <linux/module.h>
28
29 #include <asm/uaccess.h>
30 #include <linux/errno.h>
31 #include <linux/proc_fs.h>
32 #include <linux/stat.h>
33 #include <linux/mm.h>
34 #include <linux/pci.h>
35 #include <linux/ctype.h>
36 #include <linux/hdreg.h>
37 #include <linux/ide.h>
38 #include <linux/seq_file.h>
39
40 #include <asm/io.h>
41
42 static struct proc_dir_entry *proc_ide_root;
43
44 static int proc_ide_read_imodel
45         (char *page, char **start, off_t off, int count, int *eof, void *data)
46 {
47         ide_hwif_t      *hwif = (ide_hwif_t *) data;
48         int             len;
49         const char      *name;
50
51         /*
52          * Neither ide_unknown nor ide_forced should be set at this point.
53          */
54         switch (hwif->chipset) {
55                 case ide_generic:       name = "generic";       break;
56                 case ide_pci:           name = "pci";           break;
57                 case ide_cmd640:        name = "cmd640";        break;
58                 case ide_dtc2278:       name = "dtc2278";       break;
59                 case ide_ali14xx:       name = "ali14xx";       break;
60                 case ide_qd65xx:        name = "qd65xx";        break;
61                 case ide_umc8672:       name = "umc8672";       break;
62                 case ide_ht6560b:       name = "ht6560b";       break;
63                 case ide_rz1000:        name = "rz1000";        break;
64                 case ide_trm290:        name = "trm290";        break;
65                 case ide_cmd646:        name = "cmd646";        break;
66                 case ide_cy82c693:      name = "cy82c693";      break;
67                 case ide_4drives:       name = "4drives";       break;
68                 case ide_pmac:          name = "mac-io";        break;
69                 case ide_au1xxx:        name = "au1xxx";        break;
70                 case ide_etrax100:      name = "etrax100";      break;
71                 case ide_acorn:         name = "acorn";         break;
72                 default:                name = "(unknown)";     break;
73         }
74         len = sprintf(page, "%s\n", name);
75         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
76 }
77
78 static int proc_ide_read_mate
79         (char *page, char **start, off_t off, int count, int *eof, void *data)
80 {
81         ide_hwif_t      *hwif = (ide_hwif_t *) data;
82         int             len;
83
84         if (hwif && hwif->mate && hwif->mate->present)
85                 len = sprintf(page, "%s\n", hwif->mate->name);
86         else
87                 len = sprintf(page, "(none)\n");
88         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
89 }
90
91 static int proc_ide_read_channel
92         (char *page, char **start, off_t off, int count, int *eof, void *data)
93 {
94         ide_hwif_t      *hwif = (ide_hwif_t *) data;
95         int             len;
96
97         page[0] = hwif->channel ? '1' : '0';
98         page[1] = '\n';
99         len = 2;
100         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
101 }
102
103 static int proc_ide_read_identify
104         (char *page, char **start, off_t off, int count, int *eof, void *data)
105 {
106         ide_drive_t     *drive = (ide_drive_t *)data;
107         int             len = 0, i = 0;
108         int             err = 0;
109
110         len = sprintf(page, "\n");
111
112         if (drive) {
113                 unsigned short *val = (unsigned short *) page;
114
115                 err = taskfile_lib_get_identify(drive, page);
116                 if (!err) {
117                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
118                         page = out;
119                         do {
120                                 out += sprintf(out, "%04x%c",
121                                         le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
122                                 val += 1;
123                         } while (i < (SECTOR_WORDS * 2));
124                         len = out - page;
125                 }
126         }
127         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
128 }
129
130 /**
131  *      __ide_add_setting       -       add an ide setting option
132  *      @drive: drive to use
133  *      @name: setting name
134  *      @rw: true if the function is read write
135  *      @data_type: type of data
136  *      @min: range minimum
137  *      @max: range maximum
138  *      @mul_factor: multiplication scale
139  *      @div_factor: divison scale
140  *      @data: private data field
141  *      @set: setting
142  *      @auto_remove: setting auto removal flag
143  *
144  *      Removes the setting named from the device if it is present.
145  *      The function takes the settings_lock to protect against
146  *      parallel changes. This function must not be called from IRQ
147  *      context. Returns 0 on success or -1 on failure.
148  *
149  *      BUGS: This code is seriously over-engineered. There is also
150  *      magic about how the driver specific features are setup. If
151  *      a driver is attached we assume the driver settings are auto
152  *      remove.
153  */
154
155 static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
156 {
157         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
158
159         mutex_lock(&ide_setting_mtx);
160         while ((*p) && strcmp((*p)->name, name) < 0)
161                 p = &((*p)->next);
162         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
163                 goto abort;
164         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
165                 goto abort;
166         strcpy(setting->name, name);
167         setting->rw = rw;
168         setting->data_type = data_type;
169         setting->min = min;
170         setting->max = max;
171         setting->mul_factor = mul_factor;
172         setting->div_factor = div_factor;
173         setting->data = data;
174         setting->set = set;
175
176         setting->next = *p;
177         if (auto_remove)
178                 setting->auto_remove = 1;
179         *p = setting;
180         mutex_unlock(&ide_setting_mtx);
181         return 0;
182 abort:
183         mutex_unlock(&ide_setting_mtx);
184         kfree(setting);
185         return -1;
186 }
187
188 int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
189 {
190         return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
191 }
192
193 EXPORT_SYMBOL(ide_add_setting);
194
195 /**
196  *      __ide_remove_setting    -       remove an ide setting option
197  *      @drive: drive to use
198  *      @name: setting name
199  *
200  *      Removes the setting named from the device if it is present.
201  *      The caller must hold the setting semaphore.
202  */
203
204 static void __ide_remove_setting (ide_drive_t *drive, char *name)
205 {
206         ide_settings_t **p, *setting;
207
208         p = (ide_settings_t **) &drive->settings;
209
210         while ((*p) && strcmp((*p)->name, name))
211                 p = &((*p)->next);
212         if ((setting = (*p)) == NULL)
213                 return;
214
215         (*p) = setting->next;
216
217         kfree(setting->name);
218         kfree(setting);
219 }
220
221 /**
222  *      auto_remove_settings    -       remove driver specific settings
223  *      @drive: drive
224  *
225  *      Automatically remove all the driver specific settings for this
226  *      drive. This function may not be called from IRQ context. The
227  *      caller must hold ide_setting_mtx.
228  */
229
230 static void auto_remove_settings (ide_drive_t *drive)
231 {
232         ide_settings_t *setting;
233 repeat:
234         setting = drive->settings;
235         while (setting) {
236                 if (setting->auto_remove) {
237                         __ide_remove_setting(drive, setting->name);
238                         goto repeat;
239                 }
240                 setting = setting->next;
241         }
242 }
243
244 /**
245  *      ide_find_setting_by_name        -       find a drive specific setting
246  *      @drive: drive to scan
247  *      @name: setting name
248  *
249  *      Scan's the device setting table for a matching entry and returns
250  *      this or NULL if no entry is found. The caller must hold the
251  *      setting semaphore
252  */
253
254 static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name)
255 {
256         ide_settings_t *setting = drive->settings;
257
258         while (setting) {
259                 if (strcmp(setting->name, name) == 0)
260                         break;
261                 setting = setting->next;
262         }
263         return setting;
264 }
265
266 /**
267  *      ide_read_setting        -       read an IDE setting
268  *      @drive: drive to read from
269  *      @setting: drive setting
270  *
271  *      Read a drive setting and return the value. The caller
272  *      must hold the ide_setting_mtx when making this call.
273  *
274  *      BUGS: the data return and error are the same return value
275  *      so an error -EINVAL and true return of the same value cannot
276  *      be told apart
277  */
278
279 static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting)
280 {
281         int             val = -EINVAL;
282         unsigned long   flags;
283
284         if ((setting->rw & SETTING_READ)) {
285                 spin_lock_irqsave(&ide_lock, flags);
286                 switch(setting->data_type) {
287                         case TYPE_BYTE:
288                                 val = *((u8 *) setting->data);
289                                 break;
290                         case TYPE_SHORT:
291                                 val = *((u16 *) setting->data);
292                                 break;
293                         case TYPE_INT:
294                                 val = *((u32 *) setting->data);
295                                 break;
296                 }
297                 spin_unlock_irqrestore(&ide_lock, flags);
298         }
299         return val;
300 }
301
302 /**
303  *      ide_write_setting       -       read an IDE setting
304  *      @drive: drive to read from
305  *      @setting: drive setting
306  *      @val: value
307  *
308  *      Write a drive setting if it is possible. The caller
309  *      must hold the ide_setting_mtx when making this call.
310  *
311  *      BUGS: the data return and error are the same return value
312  *      so an error -EINVAL and true return of the same value cannot
313  *      be told apart
314  *
315  *      FIXME:  This should be changed to enqueue a special request
316  *      to the driver to change settings, and then wait on a sema for completion.
317  *      The current scheme of polling is kludgy, though safe enough.
318  */
319
320 static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val)
321 {
322         if (!capable(CAP_SYS_ADMIN))
323                 return -EACCES;
324         if (setting->set)
325                 return setting->set(drive, val);
326         if (!(setting->rw & SETTING_WRITE))
327                 return -EPERM;
328         if (val < setting->min || val > setting->max)
329                 return -EINVAL;
330         if (ide_spin_wait_hwgroup(drive))
331                 return -EBUSY;
332         switch (setting->data_type) {
333                 case TYPE_BYTE:
334                         *((u8 *) setting->data) = val;
335                         break;
336                 case TYPE_SHORT:
337                         *((u16 *) setting->data) = val;
338                         break;
339                 case TYPE_INT:
340                         *((u32 *) setting->data) = val;
341                         break;
342         }
343         spin_unlock_irq(&ide_lock);
344         return 0;
345 }
346
347 static int set_xfer_rate (ide_drive_t *drive, int arg)
348 {
349         ide_task_t task;
350         int err;
351
352         if (arg < 0 || arg > 70)
353                 return -EINVAL;
354
355         memset(&task, 0, sizeof(task));
356         task.tf.command = WIN_SETFEATURES;
357         task.tf.feature = SETFEATURES_XFER;
358         task.tf.nsect   = (u8)arg;
359         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
360                         IDE_TFLAG_IN_NSECT;
361
362         err = ide_no_data_taskfile(drive, &task);
363
364         if (!err && arg) {
365                 ide_set_xfer_rate(drive, (u8) arg);
366                 ide_driveid_update(drive);
367         }
368         return err;
369 }
370
371 /**
372  *      ide_add_generic_settings        -       generic ide settings
373  *      @drive: drive being configured
374  *
375  *      Add the generic parts of the system settings to the /proc files.
376  *      The caller must not be holding the ide_setting_mtx.
377  */
378
379 void ide_add_generic_settings (ide_drive_t *drive)
380 {
381 /*
382  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
383  */
384         __ide_add_setting(drive,        "io_32bit",             drive->no_io_32bit ? SETTING_READ : SETTING_RW, TYPE_BYTE,      0,      1 + (SUPPORT_VLB_SYNC << 1),    1,              1,              &drive->io_32bit,               set_io_32bit,   0);
385         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
386         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
387         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
388         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
389         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
390         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
391         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
392         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
393 }
394
395 static void proc_ide_settings_warn(void)
396 {
397         static int warned = 0;
398
399         if (warned)
400                 return;
401
402         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
403                             "obsolete, and will be removed soon!\n");
404         warned = 1;
405 }
406
407 static int proc_ide_read_settings
408         (char *page, char **start, off_t off, int count, int *eof, void *data)
409 {
410         ide_drive_t     *drive = (ide_drive_t *) data;
411         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
412         char            *out = page;
413         int             len, rc, mul_factor, div_factor;
414
415         proc_ide_settings_warn();
416
417         mutex_lock(&ide_setting_mtx);
418         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
419         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
420         while(setting) {
421                 mul_factor = setting->mul_factor;
422                 div_factor = setting->div_factor;
423                 out += sprintf(out, "%-24s", setting->name);
424                 if ((rc = ide_read_setting(drive, setting)) >= 0)
425                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
426                 else
427                         out += sprintf(out, "%-16s", "write-only");
428                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
429                 if (setting->rw & SETTING_READ)
430                         out += sprintf(out, "r");
431                 if (setting->rw & SETTING_WRITE)
432                         out += sprintf(out, "w");
433                 out += sprintf(out, "\n");
434                 setting = setting->next;
435         }
436         len = out - page;
437         mutex_unlock(&ide_setting_mtx);
438         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
439 }
440
441 #define MAX_LEN 30
442
443 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
444                                    unsigned long count, void *data)
445 {
446         ide_drive_t     *drive = (ide_drive_t *) data;
447         char            name[MAX_LEN + 1];
448         int             for_real = 0;
449         unsigned long   n;
450         ide_settings_t  *setting;
451         char *buf, *s;
452
453         if (!capable(CAP_SYS_ADMIN))
454                 return -EACCES;
455
456         proc_ide_settings_warn();
457
458         if (count >= PAGE_SIZE)
459                 return -EINVAL;
460
461         s = buf = (char *)__get_free_page(GFP_USER);
462         if (!buf)
463                 return -ENOMEM;
464
465         if (copy_from_user(buf, buffer, count)) {
466                 free_page((unsigned long)buf);
467                 return -EFAULT;
468         }
469
470         buf[count] = '\0';
471
472         /*
473          * Skip over leading whitespace
474          */
475         while (count && isspace(*s)) {
476                 --count;
477                 ++s;
478         }
479         /*
480          * Do one full pass to verify all parameters,
481          * then do another to actually write the new settings.
482          */
483         do {
484                 char *p = s;
485                 n = count;
486                 while (n > 0) {
487                         unsigned val;
488                         char *q = p;
489
490                         while (n > 0 && *p != ':') {
491                                 --n;
492                                 p++;
493                         }
494                         if (*p != ':')
495                                 goto parse_error;
496                         if (p - q > MAX_LEN)
497                                 goto parse_error;
498                         memcpy(name, q, p - q);
499                         name[p - q] = 0;
500
501                         if (n > 0) {
502                                 --n;
503                                 p++;
504                         } else
505                                 goto parse_error;
506
507                         val = simple_strtoul(p, &q, 10);
508                         n -= q - p;
509                         p = q;
510                         if (n > 0 && !isspace(*p))
511                                 goto parse_error;
512                         while (n > 0 && isspace(*p)) {
513                                 --n;
514                                 ++p;
515                         }
516
517                         mutex_lock(&ide_setting_mtx);
518                         setting = ide_find_setting_by_name(drive, name);
519                         if (!setting)
520                         {
521                                 mutex_unlock(&ide_setting_mtx);
522                                 goto parse_error;
523                         }
524                         if (for_real)
525                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
526                         mutex_unlock(&ide_setting_mtx);
527                 }
528         } while (!for_real++);
529         free_page((unsigned long)buf);
530         return count;
531 parse_error:
532         free_page((unsigned long)buf);
533         printk("proc_ide_write_settings(): parse error\n");
534         return -EINVAL;
535 }
536
537 int proc_ide_read_capacity
538         (char *page, char **start, off_t off, int count, int *eof, void *data)
539 {
540         int len = sprintf(page,"%llu\n", (long long)0x7fffffff);
541         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
542 }
543
544 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
545
546 int proc_ide_read_geometry
547         (char *page, char **start, off_t off, int count, int *eof, void *data)
548 {
549         ide_drive_t     *drive = (ide_drive_t *) data;
550         char            *out = page;
551         int             len;
552
553         out += sprintf(out,"physical     %d/%d/%d\n",
554                         drive->cyl, drive->head, drive->sect);
555         out += sprintf(out,"logical      %d/%d/%d\n",
556                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
557
558         len = out - page;
559         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
560 }
561
562 EXPORT_SYMBOL(proc_ide_read_geometry);
563
564 static int proc_ide_read_dmodel
565         (char *page, char **start, off_t off, int count, int *eof, void *data)
566 {
567         ide_drive_t     *drive = (ide_drive_t *) data;
568         struct hd_driveid *id = drive->id;
569         int             len;
570
571         len = sprintf(page, "%.40s\n",
572                 (id && id->model[0]) ? (char *)id->model : "(none)");
573         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
574 }
575
576 static int proc_ide_read_driver
577         (char *page, char **start, off_t off, int count, int *eof, void *data)
578 {
579         ide_drive_t     *drive = (ide_drive_t *) data;
580         struct device   *dev = &drive->gendev;
581         ide_driver_t    *ide_drv;
582         int             len;
583
584         if (dev->driver) {
585                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
586                 len = sprintf(page, "%s version %s\n",
587                                 dev->driver->name, ide_drv->version);
588         } else
589                 len = sprintf(page, "ide-default version 0.9.newide\n");
590         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
591 }
592
593 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
594 {
595         struct device *dev = &drive->gendev;
596         int ret = 1;
597         int err;
598
599         device_release_driver(dev);
600         /* FIXME: device can still be in use by previous driver */
601         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
602         err = device_attach(dev);
603         if (err < 0)
604                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
605                         __FUNCTION__, err);
606         drive->driver_req[0] = 0;
607         if (dev->driver == NULL) {
608                 err = device_attach(dev);
609                 if (err < 0)
610                         printk(KERN_WARNING
611                                 "IDE: %s: device_attach(2) error: %d\n",
612                                 __FUNCTION__, err);
613         }
614         if (dev->driver && !strcmp(dev->driver->name, driver))
615                 ret = 0;
616
617         return ret;
618 }
619
620 static int proc_ide_write_driver
621         (struct file *file, const char __user *buffer, unsigned long count, void *data)
622 {
623         ide_drive_t     *drive = (ide_drive_t *) data;
624         char name[32];
625
626         if (!capable(CAP_SYS_ADMIN))
627                 return -EACCES;
628         if (count > 31)
629                 count = 31;
630         if (copy_from_user(name, buffer, count))
631                 return -EFAULT;
632         name[count] = '\0';
633         if (ide_replace_subdriver(drive, name))
634                 return -EINVAL;
635         return count;
636 }
637
638 static int proc_ide_read_media
639         (char *page, char **start, off_t off, int count, int *eof, void *data)
640 {
641         ide_drive_t     *drive = (ide_drive_t *) data;
642         const char      *media;
643         int             len;
644
645         switch (drive->media) {
646                 case ide_disk:  media = "disk\n";
647                                 break;
648                 case ide_cdrom: media = "cdrom\n";
649                                 break;
650                 case ide_tape:  media = "tape\n";
651                                 break;
652                 case ide_floppy:media = "floppy\n";
653                                 break;
654                 case ide_optical:media = "optical\n";
655                                 break;
656                 default:        media = "UNKNOWN\n";
657                                 break;
658         }
659         strcpy(page,media);
660         len = strlen(media);
661         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
662 }
663
664 static ide_proc_entry_t generic_drive_entries[] = {
665         { "driver",     S_IFREG|S_IRUGO,        proc_ide_read_driver,   proc_ide_write_driver },
666         { "identify",   S_IFREG|S_IRUSR,        proc_ide_read_identify, NULL },
667         { "media",      S_IFREG|S_IRUGO,        proc_ide_read_media,    NULL },
668         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_dmodel,   NULL },
669         { "settings",   S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings },
670         { NULL, 0, NULL, NULL }
671 };
672
673 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
674 {
675         struct proc_dir_entry *ent;
676
677         if (!dir || !p)
678                 return;
679         while (p->name != NULL) {
680                 ent = create_proc_entry(p->name, p->mode, dir);
681                 if (!ent) return;
682                 ent->data = data;
683                 ent->read_proc = p->read_proc;
684                 ent->write_proc = p->write_proc;
685                 p++;
686         }
687 }
688
689 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
690 {
691         if (!dir || !p)
692                 return;
693         while (p->name != NULL) {
694                 remove_proc_entry(p->name, dir);
695                 p++;
696         }
697 }
698
699 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
700 {
701         ide_add_proc_entries(drive->proc, driver->proc, drive);
702 }
703
704 EXPORT_SYMBOL(ide_proc_register_driver);
705
706 /**
707  *      ide_proc_unregister_driver      -       remove driver specific data
708  *      @drive: drive
709  *      @driver: driver
710  *
711  *      Clean up the driver specific /proc files and IDE settings
712  *      for a given drive.
713  *
714  *      Takes ide_setting_mtx and ide_lock.
715  *      Caller must hold none of the locks.
716  */
717
718 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
719 {
720         unsigned long flags;
721
722         ide_remove_proc_entries(drive->proc, driver->proc);
723
724         mutex_lock(&ide_setting_mtx);
725         spin_lock_irqsave(&ide_lock, flags);
726         /*
727          * ide_setting_mtx protects the settings list
728          * ide_lock protects the use of settings
729          *
730          * so we need to hold both, ide_settings_sem because we want to
731          * modify the settings list, and ide_lock because we cannot take
732          * a setting out that is being used.
733          *
734          * OTOH both ide_{read,write}_setting are only ever used under
735          * ide_setting_mtx.
736          */
737         auto_remove_settings(drive);
738         spin_unlock_irqrestore(&ide_lock, flags);
739         mutex_unlock(&ide_setting_mtx);
740 }
741
742 EXPORT_SYMBOL(ide_proc_unregister_driver);
743
744 static void create_proc_ide_drives(ide_hwif_t *hwif)
745 {
746         int     d;
747         struct proc_dir_entry *ent;
748         struct proc_dir_entry *parent = hwif->proc;
749         char name[64];
750
751         for (d = 0; d < MAX_DRIVES; d++) {
752                 ide_drive_t *drive = &hwif->drives[d];
753
754                 if (!drive->present)
755                         continue;
756                 if (drive->proc)
757                         continue;
758
759                 drive->proc = proc_mkdir(drive->name, parent);
760                 if (drive->proc)
761                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
762                 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
763                 ent = proc_symlink(drive->name, proc_ide_root, name);
764                 if (!ent) return;
765         }
766 }
767
768 static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
769 {
770         if (drive->proc) {
771                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
772                 remove_proc_entry(drive->name, proc_ide_root);
773                 remove_proc_entry(drive->name, hwif->proc);
774                 drive->proc = NULL;
775         }
776 }
777
778 static void destroy_proc_ide_drives(ide_hwif_t *hwif)
779 {
780         int     d;
781
782         for (d = 0; d < MAX_DRIVES; d++) {
783                 ide_drive_t *drive = &hwif->drives[d];
784                 if (drive->proc)
785                         destroy_proc_ide_device(hwif, drive);
786         }
787 }
788
789 static ide_proc_entry_t hwif_entries[] = {
790         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
791         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
792         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
793         { NULL, 0, NULL, NULL }
794 };
795
796 void ide_proc_register_port(ide_hwif_t *hwif)
797 {
798         if (!hwif->present)
799                 return;
800
801         if (!hwif->proc) {
802                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
803
804                 if (!hwif->proc)
805                         return;
806
807                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
808         }
809
810         create_proc_ide_drives(hwif);
811 }
812
813 #ifdef CONFIG_BLK_DEV_IDEPCI
814 void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
815 {
816         create_proc_info_entry(name, 0, proc_ide_root, get_info);
817 }
818
819 EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
820 #endif
821
822 void ide_proc_unregister_port(ide_hwif_t *hwif)
823 {
824         if (hwif->proc) {
825                 destroy_proc_ide_drives(hwif);
826                 ide_remove_proc_entries(hwif->proc, hwif_entries);
827                 remove_proc_entry(hwif->name, proc_ide_root);
828                 hwif->proc = NULL;
829         }
830 }
831
832 static int proc_print_driver(struct device_driver *drv, void *data)
833 {
834         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
835         struct seq_file *s = data;
836
837         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
838
839         return 0;
840 }
841
842 static int ide_drivers_show(struct seq_file *s, void *p)
843 {
844         int err;
845
846         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
847         if (err < 0)
848                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
849                         __FUNCTION__, err);
850         return 0;
851 }
852
853 static int ide_drivers_open(struct inode *inode, struct file *file)
854 {
855         return single_open(file, &ide_drivers_show, NULL);
856 }
857
858 static const struct file_operations ide_drivers_operations = {
859         .open           = ide_drivers_open,
860         .read           = seq_read,
861         .llseek         = seq_lseek,
862         .release        = single_release,
863 };
864
865 void proc_ide_create(void)
866 {
867         struct proc_dir_entry *entry;
868
869         proc_ide_root = proc_mkdir("ide", NULL);
870
871         if (!proc_ide_root)
872                 return;
873
874         entry = create_proc_entry("drivers", 0, proc_ide_root);
875         if (entry)
876                 entry->proc_fops = &ide_drivers_operations;
877 }
878
879 void proc_ide_destroy(void)
880 {
881         remove_proc_entry("drivers", proc_ide_root);
882         remove_proc_entry("ide", NULL);
883 }