Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux...
[linux-2.6] / drivers / ide / ide-proc.c
1 /*
2  *  Copyright (C) 1997-1998     Mark Lord
3  *  Copyright (C) 2003          Red Hat <alan@redhat.com>
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  * Also useful, "cat /proc/ide0/hda/[identify, smart_values,
17  * smart_thresholds, capabilities]" will issue an IDENTIFY /
18  * PACKET_IDENTIFY / SMART_READ_VALUES / SMART_READ_THRESHOLDS /
19  * SENSE CAPABILITIES command to /dev/hda, and then dump out the
20  * returned data as 256 16-bit words.  The "hdparm" utility will
21  * be updated someday soon to use this mechanism.
22  *
23  */
24
25 #include <linux/module.h>
26
27 #include <asm/uaccess.h>
28 #include <linux/errno.h>
29 #include <linux/proc_fs.h>
30 #include <linux/stat.h>
31 #include <linux/mm.h>
32 #include <linux/pci.h>
33 #include <linux/ctype.h>
34 #include <linux/hdreg.h>
35 #include <linux/ide.h>
36 #include <linux/seq_file.h>
37
38 #include <asm/io.h>
39
40 static struct proc_dir_entry *proc_ide_root;
41
42 static int proc_ide_read_imodel
43         (char *page, char **start, off_t off, int count, int *eof, void *data)
44 {
45         ide_hwif_t      *hwif = (ide_hwif_t *) data;
46         int             len;
47         const char      *name;
48
49         switch (hwif->chipset) {
50         case ide_generic:       name = "generic";       break;
51         case ide_pci:           name = "pci";           break;
52         case ide_cmd640:        name = "cmd640";        break;
53         case ide_dtc2278:       name = "dtc2278";       break;
54         case ide_ali14xx:       name = "ali14xx";       break;
55         case ide_qd65xx:        name = "qd65xx";        break;
56         case ide_umc8672:       name = "umc8672";       break;
57         case ide_ht6560b:       name = "ht6560b";       break;
58         case ide_rz1000:        name = "rz1000";        break;
59         case ide_trm290:        name = "trm290";        break;
60         case ide_cmd646:        name = "cmd646";        break;
61         case ide_cy82c693:      name = "cy82c693";      break;
62         case ide_4drives:       name = "4drives";       break;
63         case ide_pmac:          name = "mac-io";        break;
64         case ide_au1xxx:        name = "au1xxx";        break;
65         case ide_palm3710:      name = "palm3710";      break;
66         case ide_etrax100:      name = "etrax100";      break;
67         case ide_acorn:         name = "acorn";         break;
68         default:                name = "(unknown)";     break;
69         }
70         len = sprintf(page, "%s\n", name);
71         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
72 }
73
74 static int proc_ide_read_mate
75         (char *page, char **start, off_t off, int count, int *eof, void *data)
76 {
77         ide_hwif_t      *hwif = (ide_hwif_t *) data;
78         int             len;
79
80         if (hwif && hwif->mate && hwif->mate->present)
81                 len = sprintf(page, "%s\n", hwif->mate->name);
82         else
83                 len = sprintf(page, "(none)\n");
84         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
85 }
86
87 static int proc_ide_read_channel
88         (char *page, char **start, off_t off, int count, int *eof, void *data)
89 {
90         ide_hwif_t      *hwif = (ide_hwif_t *) data;
91         int             len;
92
93         page[0] = hwif->channel ? '1' : '0';
94         page[1] = '\n';
95         len = 2;
96         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
97 }
98
99 static int proc_ide_read_identify
100         (char *page, char **start, off_t off, int count, int *eof, void *data)
101 {
102         ide_drive_t     *drive = (ide_drive_t *)data;
103         int             len = 0, i = 0;
104         int             err = 0;
105
106         len = sprintf(page, "\n");
107
108         if (drive) {
109                 unsigned short *val = (unsigned short *) page;
110
111                 err = taskfile_lib_get_identify(drive, page);
112                 if (!err) {
113                         char *out = ((char *)page) + (SECTOR_WORDS * 4);
114                         page = out;
115                         do {
116                                 out += sprintf(out, "%04x%c",
117                                         le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
118                                 val += 1;
119                         } while (i < (SECTOR_WORDS * 2));
120                         len = out - page;
121                 }
122         }
123         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
124 }
125
126 /**
127  *      __ide_add_setting       -       add an ide setting option
128  *      @drive: drive to use
129  *      @name: setting name
130  *      @rw: true if the function is read write
131  *      @data_type: type of data
132  *      @min: range minimum
133  *      @max: range maximum
134  *      @mul_factor: multiplication scale
135  *      @div_factor: divison scale
136  *      @data: private data field
137  *      @set: setting
138  *      @auto_remove: setting auto removal flag
139  *
140  *      Removes the setting named from the device if it is present.
141  *      The function takes the settings_lock to protect against
142  *      parallel changes. This function must not be called from IRQ
143  *      context. Returns 0 on success or -1 on failure.
144  *
145  *      BUGS: This code is seriously over-engineered. There is also
146  *      magic about how the driver specific features are setup. If
147  *      a driver is attached we assume the driver settings are auto
148  *      remove.
149  */
150
151 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)
152 {
153         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
154
155         mutex_lock(&ide_setting_mtx);
156         while ((*p) && strcmp((*p)->name, name) < 0)
157                 p = &((*p)->next);
158         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
159                 goto abort;
160         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
161                 goto abort;
162         strcpy(setting->name, name);
163         setting->rw = rw;
164         setting->data_type = data_type;
165         setting->min = min;
166         setting->max = max;
167         setting->mul_factor = mul_factor;
168         setting->div_factor = div_factor;
169         setting->data = data;
170         setting->set = set;
171
172         setting->next = *p;
173         if (auto_remove)
174                 setting->auto_remove = 1;
175         *p = setting;
176         mutex_unlock(&ide_setting_mtx);
177         return 0;
178 abort:
179         mutex_unlock(&ide_setting_mtx);
180         kfree(setting);
181         return -1;
182 }
183
184 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)
185 {
186         return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
187 }
188
189 EXPORT_SYMBOL(ide_add_setting);
190
191 /**
192  *      __ide_remove_setting    -       remove an ide setting option
193  *      @drive: drive to use
194  *      @name: setting name
195  *
196  *      Removes the setting named from the device if it is present.
197  *      The caller must hold the setting semaphore.
198  */
199
200 static void __ide_remove_setting(ide_drive_t *drive, char *name)
201 {
202         ide_settings_t **p, *setting;
203
204         p = (ide_settings_t **) &drive->settings;
205
206         while ((*p) && strcmp((*p)->name, name))
207                 p = &((*p)->next);
208         setting = (*p);
209         if (setting == NULL)
210                 return;
211
212         (*p) = setting->next;
213
214         kfree(setting->name);
215         kfree(setting);
216 }
217
218 /**
219  *      auto_remove_settings    -       remove driver specific settings
220  *      @drive: drive
221  *
222  *      Automatically remove all the driver specific settings for this
223  *      drive. This function may not be called from IRQ context. The
224  *      caller must hold ide_setting_mtx.
225  */
226
227 static void auto_remove_settings(ide_drive_t *drive)
228 {
229         ide_settings_t *setting;
230 repeat:
231         setting = drive->settings;
232         while (setting) {
233                 if (setting->auto_remove) {
234                         __ide_remove_setting(drive, setting->name);
235                         goto repeat;
236                 }
237                 setting = setting->next;
238         }
239 }
240
241 /**
242  *      ide_find_setting_by_name        -       find a drive specific setting
243  *      @drive: drive to scan
244  *      @name: setting name
245  *
246  *      Scan's the device setting table for a matching entry and returns
247  *      this or NULL if no entry is found. The caller must hold the
248  *      setting semaphore
249  */
250
251 static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name)
252 {
253         ide_settings_t *setting = drive->settings;
254
255         while (setting) {
256                 if (strcmp(setting->name, name) == 0)
257                         break;
258                 setting = setting->next;
259         }
260         return setting;
261 }
262
263 /**
264  *      ide_read_setting        -       read an IDE setting
265  *      @drive: drive to read from
266  *      @setting: drive setting
267  *
268  *      Read a drive setting and return the value. The caller
269  *      must hold the ide_setting_mtx when making this call.
270  *
271  *      BUGS: the data return and error are the same return value
272  *      so an error -EINVAL and true return of the same value cannot
273  *      be told apart
274  */
275
276 static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting)
277 {
278         int             val = -EINVAL;
279         unsigned long   flags;
280
281         if ((setting->rw & SETTING_READ)) {
282                 spin_lock_irqsave(&ide_lock, flags);
283                 switch (setting->data_type) {
284                 case TYPE_BYTE:
285                         val = *((u8 *) setting->data);
286                         break;
287                 case TYPE_SHORT:
288                         val = *((u16 *) setting->data);
289                         break;
290                 case TYPE_INT:
291                         val = *((u32 *) setting->data);
292                         break;
293                 }
294                 spin_unlock_irqrestore(&ide_lock, flags);
295         }
296         return val;
297 }
298
299 /**
300  *      ide_write_setting       -       read an IDE setting
301  *      @drive: drive to read from
302  *      @setting: drive setting
303  *      @val: value
304  *
305  *      Write a drive setting if it is possible. The caller
306  *      must hold the ide_setting_mtx when making this call.
307  *
308  *      BUGS: the data return and error are the same return value
309  *      so an error -EINVAL and true return of the same value cannot
310  *      be told apart
311  *
312  *      FIXME:  This should be changed to enqueue a special request
313  *      to the driver to change settings, and then wait on a sema for completion.
314  *      The current scheme of polling is kludgy, though safe enough.
315  */
316
317 static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val)
318 {
319         if (!capable(CAP_SYS_ADMIN))
320                 return -EACCES;
321         if (setting->set)
322                 return setting->set(drive, val);
323         if (!(setting->rw & SETTING_WRITE))
324                 return -EPERM;
325         if (val < setting->min || val > setting->max)
326                 return -EINVAL;
327         if (ide_spin_wait_hwgroup(drive))
328                 return -EBUSY;
329         switch (setting->data_type) {
330         case TYPE_BYTE:
331                 *((u8 *) setting->data) = val;
332                 break;
333         case TYPE_SHORT:
334                 *((u16 *) setting->data) = val;
335                 break;
336         case TYPE_INT:
337                 *((u32 *) setting->data) = val;
338                 break;
339         }
340         spin_unlock_irq(&ide_lock);
341         return 0;
342 }
343
344 static int set_xfer_rate (ide_drive_t *drive, int arg)
345 {
346         ide_task_t task;
347         int err;
348
349         if (arg < 0 || arg > 70)
350                 return -EINVAL;
351
352         memset(&task, 0, sizeof(task));
353         task.tf.command = WIN_SETFEATURES;
354         task.tf.feature = SETFEATURES_XFER;
355         task.tf.nsect   = (u8)arg;
356         task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
357                         IDE_TFLAG_IN_NSECT;
358
359         err = ide_no_data_taskfile(drive, &task);
360
361         if (!err && arg) {
362                 ide_set_xfer_rate(drive, (u8) arg);
363                 ide_driveid_update(drive);
364         }
365         return err;
366 }
367
368 /**
369  *      ide_add_generic_settings        -       generic ide settings
370  *      @drive: drive being configured
371  *
372  *      Add the generic parts of the system settings to the /proc files.
373  *      The caller must not be holding the ide_setting_mtx.
374  */
375
376 void ide_add_generic_settings (ide_drive_t *drive)
377 {
378 /*
379  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
380  */
381         __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);
382         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
383         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
384         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
385         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
386         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
387         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
388         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
389         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
390 }
391
392 static void proc_ide_settings_warn(void)
393 {
394         static int warned;
395
396         if (warned)
397                 return;
398
399         printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
400                             "obsolete, and will be removed soon!\n");
401         warned = 1;
402 }
403
404 static int proc_ide_read_settings
405         (char *page, char **start, off_t off, int count, int *eof, void *data)
406 {
407         ide_drive_t     *drive = (ide_drive_t *) data;
408         ide_settings_t  *setting = (ide_settings_t *) drive->settings;
409         char            *out = page;
410         int             len, rc, mul_factor, div_factor;
411
412         proc_ide_settings_warn();
413
414         mutex_lock(&ide_setting_mtx);
415         out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
416         out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
417         while (setting) {
418                 mul_factor = setting->mul_factor;
419                 div_factor = setting->div_factor;
420                 out += sprintf(out, "%-24s", setting->name);
421                 rc = ide_read_setting(drive, setting);
422                 if (rc >= 0)
423                         out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
424                 else
425                         out += sprintf(out, "%-16s", "write-only");
426                 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
427                 if (setting->rw & SETTING_READ)
428                         out += sprintf(out, "r");
429                 if (setting->rw & SETTING_WRITE)
430                         out += sprintf(out, "w");
431                 out += sprintf(out, "\n");
432                 setting = setting->next;
433         }
434         len = out - page;
435         mutex_unlock(&ide_setting_mtx);
436         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
437 }
438
439 #define MAX_LEN 30
440
441 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
442                                    unsigned long count, void *data)
443 {
444         ide_drive_t     *drive = (ide_drive_t *) data;
445         char            name[MAX_LEN + 1];
446         int             for_real = 0;
447         unsigned long   n;
448         ide_settings_t  *setting;
449         char *buf, *s;
450
451         if (!capable(CAP_SYS_ADMIN))
452                 return -EACCES;
453
454         proc_ide_settings_warn();
455
456         if (count >= PAGE_SIZE)
457                 return -EINVAL;
458
459         s = buf = (char *)__get_free_page(GFP_USER);
460         if (!buf)
461                 return -ENOMEM;
462
463         if (copy_from_user(buf, buffer, count)) {
464                 free_page((unsigned long)buf);
465                 return -EFAULT;
466         }
467
468         buf[count] = '\0';
469
470         /*
471          * Skip over leading whitespace
472          */
473         while (count && isspace(*s)) {
474                 --count;
475                 ++s;
476         }
477         /*
478          * Do one full pass to verify all parameters,
479          * then do another to actually write the new settings.
480          */
481         do {
482                 char *p = s;
483                 n = count;
484                 while (n > 0) {
485                         unsigned val;
486                         char *q = p;
487
488                         while (n > 0 && *p != ':') {
489                                 --n;
490                                 p++;
491                         }
492                         if (*p != ':')
493                                 goto parse_error;
494                         if (p - q > MAX_LEN)
495                                 goto parse_error;
496                         memcpy(name, q, p - q);
497                         name[p - q] = 0;
498
499                         if (n > 0) {
500                                 --n;
501                                 p++;
502                         } else
503                                 goto parse_error;
504
505                         val = simple_strtoul(p, &q, 10);
506                         n -= q - p;
507                         p = q;
508                         if (n > 0 && !isspace(*p))
509                                 goto parse_error;
510                         while (n > 0 && isspace(*p)) {
511                                 --n;
512                                 ++p;
513                         }
514
515                         mutex_lock(&ide_setting_mtx);
516                         setting = ide_find_setting_by_name(drive, name);
517                         if (!setting) {
518                                 mutex_unlock(&ide_setting_mtx);
519                                 goto parse_error;
520                         }
521                         if (for_real)
522                                 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
523                         mutex_unlock(&ide_setting_mtx);
524                 }
525         } while (!for_real++);
526         free_page((unsigned long)buf);
527         return count;
528 parse_error:
529         free_page((unsigned long)buf);
530         printk("proc_ide_write_settings(): parse error\n");
531         return -EINVAL;
532 }
533
534 int proc_ide_read_capacity
535         (char *page, char **start, off_t off, int count, int *eof, void *data)
536 {
537         int len = sprintf(page, "%llu\n", (long long)0x7fffffff);
538         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
539 }
540
541 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
542
543 int proc_ide_read_geometry
544         (char *page, char **start, off_t off, int count, int *eof, void *data)
545 {
546         ide_drive_t     *drive = (ide_drive_t *) data;
547         char            *out = page;
548         int             len;
549
550         out += sprintf(out, "physical     %d/%d/%d\n",
551                         drive->cyl, drive->head, drive->sect);
552         out += sprintf(out, "logical      %d/%d/%d\n",
553                         drive->bios_cyl, drive->bios_head, drive->bios_sect);
554
555         len = out - page;
556         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
557 }
558
559 EXPORT_SYMBOL(proc_ide_read_geometry);
560
561 static int proc_ide_read_dmodel
562         (char *page, char **start, off_t off, int count, int *eof, void *data)
563 {
564         ide_drive_t     *drive = (ide_drive_t *) data;
565         struct hd_driveid *id = drive->id;
566         int             len;
567
568         len = sprintf(page, "%.40s\n",
569                 (id && id->model[0]) ? (char *)id->model : "(none)");
570         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
571 }
572
573 static int proc_ide_read_driver
574         (char *page, char **start, off_t off, int count, int *eof, void *data)
575 {
576         ide_drive_t     *drive = (ide_drive_t *) data;
577         struct device   *dev = &drive->gendev;
578         ide_driver_t    *ide_drv;
579         int             len;
580
581         if (dev->driver) {
582                 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
583                 len = sprintf(page, "%s version %s\n",
584                                 dev->driver->name, ide_drv->version);
585         } else
586                 len = sprintf(page, "ide-default version 0.9.newide\n");
587         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
588 }
589
590 static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
591 {
592         struct device *dev = &drive->gendev;
593         int ret = 1;
594         int err;
595
596         device_release_driver(dev);
597         /* FIXME: device can still be in use by previous driver */
598         strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
599         err = device_attach(dev);
600         if (err < 0)
601                 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
602                         __func__, err);
603         drive->driver_req[0] = 0;
604         if (dev->driver == NULL) {
605                 err = device_attach(dev);
606                 if (err < 0)
607                         printk(KERN_WARNING
608                                 "IDE: %s: device_attach(2) error: %d\n",
609                                 __func__, err);
610         }
611         if (dev->driver && !strcmp(dev->driver->name, driver))
612                 ret = 0;
613
614         return ret;
615 }
616
617 static int proc_ide_write_driver
618         (struct file *file, const char __user *buffer, unsigned long count, void *data)
619 {
620         ide_drive_t     *drive = (ide_drive_t *) data;
621         char name[32];
622
623         if (!capable(CAP_SYS_ADMIN))
624                 return -EACCES;
625         if (count > 31)
626                 count = 31;
627         if (copy_from_user(name, buffer, count))
628                 return -EFAULT;
629         name[count] = '\0';
630         if (ide_replace_subdriver(drive, name))
631                 return -EINVAL;
632         return count;
633 }
634
635 static int proc_ide_read_media
636         (char *page, char **start, off_t off, int count, int *eof, void *data)
637 {
638         ide_drive_t     *drive = (ide_drive_t *) data;
639         const char      *media;
640         int             len;
641
642         switch (drive->media) {
643         case ide_disk:          media = "disk\n";       break;
644         case ide_cdrom:         media = "cdrom\n";      break;
645         case ide_tape:          media = "tape\n";       break;
646         case ide_floppy:        media = "floppy\n";     break;
647         case ide_optical:       media = "optical\n";    break;
648         default:                media = "UNKNOWN\n";    break;
649         }
650         strcpy(page, media);
651         len = strlen(media);
652         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
653 }
654
655 static ide_proc_entry_t generic_drive_entries[] = {
656         { "driver",     S_IFREG|S_IRUGO,         proc_ide_read_driver,
657                                                  proc_ide_write_driver },
658         { "identify",   S_IFREG|S_IRUSR,         proc_ide_read_identify, NULL },
659         { "media",      S_IFREG|S_IRUGO,         proc_ide_read_media,    NULL },
660         { "model",      S_IFREG|S_IRUGO,         proc_ide_read_dmodel,   NULL },
661         { "settings",   S_IFREG|S_IRUSR|S_IWUSR, proc_ide_read_settings,
662                                                  proc_ide_write_settings },
663         { NULL, 0, NULL, NULL }
664 };
665
666 static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
667 {
668         struct proc_dir_entry *ent;
669
670         if (!dir || !p)
671                 return;
672         while (p->name != NULL) {
673                 ent = create_proc_entry(p->name, p->mode, dir);
674                 if (!ent) return;
675                 ent->data = data;
676                 ent->read_proc = p->read_proc;
677                 ent->write_proc = p->write_proc;
678                 p++;
679         }
680 }
681
682 static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
683 {
684         if (!dir || !p)
685                 return;
686         while (p->name != NULL) {
687                 remove_proc_entry(p->name, dir);
688                 p++;
689         }
690 }
691
692 void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
693 {
694         ide_add_proc_entries(drive->proc, driver->proc, drive);
695 }
696
697 EXPORT_SYMBOL(ide_proc_register_driver);
698
699 /**
700  *      ide_proc_unregister_driver      -       remove driver specific data
701  *      @drive: drive
702  *      @driver: driver
703  *
704  *      Clean up the driver specific /proc files and IDE settings
705  *      for a given drive.
706  *
707  *      Takes ide_setting_mtx and ide_lock.
708  *      Caller must hold none of the locks.
709  */
710
711 void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
712 {
713         unsigned long flags;
714
715         ide_remove_proc_entries(drive->proc, driver->proc);
716
717         mutex_lock(&ide_setting_mtx);
718         spin_lock_irqsave(&ide_lock, flags);
719         /*
720          * ide_setting_mtx protects the settings list
721          * ide_lock protects the use of settings
722          *
723          * so we need to hold both, ide_settings_sem because we want to
724          * modify the settings list, and ide_lock because we cannot take
725          * a setting out that is being used.
726          *
727          * OTOH both ide_{read,write}_setting are only ever used under
728          * ide_setting_mtx.
729          */
730         auto_remove_settings(drive);
731         spin_unlock_irqrestore(&ide_lock, flags);
732         mutex_unlock(&ide_setting_mtx);
733 }
734 EXPORT_SYMBOL(ide_proc_unregister_driver);
735
736 void ide_proc_port_register_devices(ide_hwif_t *hwif)
737 {
738         int     d;
739         struct proc_dir_entry *ent;
740         struct proc_dir_entry *parent = hwif->proc;
741         char name[64];
742
743         for (d = 0; d < MAX_DRIVES; d++) {
744                 ide_drive_t *drive = &hwif->drives[d];
745
746                 if (!drive->present)
747                         continue;
748                 if (drive->proc)
749                         continue;
750
751                 drive->proc = proc_mkdir(drive->name, parent);
752                 if (drive->proc)
753                         ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
754                 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
755                 ent = proc_symlink(drive->name, proc_ide_root, name);
756                 if (!ent) return;
757         }
758 }
759
760 void ide_proc_unregister_device(ide_drive_t *drive)
761 {
762         if (drive->proc) {
763                 ide_remove_proc_entries(drive->proc, generic_drive_entries);
764                 remove_proc_entry(drive->name, proc_ide_root);
765                 remove_proc_entry(drive->name, drive->hwif->proc);
766                 drive->proc = NULL;
767         }
768 }
769
770 static ide_proc_entry_t hwif_entries[] = {
771         { "channel",    S_IFREG|S_IRUGO,        proc_ide_read_channel,  NULL },
772         { "mate",       S_IFREG|S_IRUGO,        proc_ide_read_mate,     NULL },
773         { "model",      S_IFREG|S_IRUGO,        proc_ide_read_imodel,   NULL },
774         { NULL, 0, NULL, NULL }
775 };
776
777 void ide_proc_register_port(ide_hwif_t *hwif)
778 {
779         if (!hwif->proc) {
780                 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
781
782                 if (!hwif->proc)
783                         return;
784
785                 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
786         }
787 }
788
789 void ide_proc_unregister_port(ide_hwif_t *hwif)
790 {
791         if (hwif->proc) {
792                 ide_remove_proc_entries(hwif->proc, hwif_entries);
793                 remove_proc_entry(hwif->name, proc_ide_root);
794                 hwif->proc = NULL;
795         }
796 }
797
798 static int proc_print_driver(struct device_driver *drv, void *data)
799 {
800         ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
801         struct seq_file *s = data;
802
803         seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
804
805         return 0;
806 }
807
808 static int ide_drivers_show(struct seq_file *s, void *p)
809 {
810         int err;
811
812         err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
813         if (err < 0)
814                 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
815                         __func__, err);
816         return 0;
817 }
818
819 static int ide_drivers_open(struct inode *inode, struct file *file)
820 {
821         return single_open(file, &ide_drivers_show, NULL);
822 }
823
824 static const struct file_operations ide_drivers_operations = {
825         .owner          = THIS_MODULE,
826         .open           = ide_drivers_open,
827         .read           = seq_read,
828         .llseek         = seq_lseek,
829         .release        = single_release,
830 };
831
832 void proc_ide_create(void)
833 {
834         proc_ide_root = proc_mkdir("ide", NULL);
835
836         if (!proc_ide_root)
837                 return;
838
839         proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
840 }
841
842 void proc_ide_destroy(void)
843 {
844         remove_proc_entry("drivers", proc_ide_root);
845         remove_proc_entry("ide", NULL);
846 }