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1da177e4 LT |
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> | |
7662d046 BZ |
6 | * |
7 | * Some code was moved here from ide.c, see it for original copyrights. | |
1da177e4 LT |
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 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <asm/uaccess.h> | |
30 | #include <linux/errno.h> | |
1da177e4 LT |
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 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 | /* | |
50 | * Neither ide_unknown nor ide_forced should be set at this point. | |
51 | */ | |
52 | switch (hwif->chipset) { | |
53 | case ide_generic: name = "generic"; break; | |
54 | case ide_pci: name = "pci"; break; | |
55 | case ide_cmd640: name = "cmd640"; break; | |
56 | case ide_dtc2278: name = "dtc2278"; break; | |
57 | case ide_ali14xx: name = "ali14xx"; break; | |
58 | case ide_qd65xx: name = "qd65xx"; break; | |
59 | case ide_umc8672: name = "umc8672"; break; | |
60 | case ide_ht6560b: name = "ht6560b"; break; | |
61 | case ide_rz1000: name = "rz1000"; break; | |
62 | case ide_trm290: name = "trm290"; break; | |
63 | case ide_cmd646: name = "cmd646"; break; | |
64 | case ide_cy82c693: name = "cy82c693"; break; | |
65 | case ide_4drives: name = "4drives"; break; | |
66 | case ide_pmac: name = "mac-io"; break; | |
26a940e2 | 67 | case ide_au1xxx: name = "au1xxx"; break; |
1da177e4 LT |
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 | ||
7662d046 BZ |
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 | down(&ide_setting_sem); | |
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 | up(&ide_setting_sem); | |
177 | return 0; | |
178 | abort: | |
179 | up(&ide_setting_sem); | |
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 | if ((setting = (*p)) == NULL) | |
209 | return; | |
210 | ||
211 | (*p) = setting->next; | |
212 | ||
213 | kfree(setting->name); | |
214 | kfree(setting); | |
215 | } | |
216 | ||
217 | /** | |
218 | * auto_remove_settings - remove driver specific settings | |
219 | * @drive: drive | |
220 | * | |
221 | * Automatically remove all the driver specific settings for this | |
222 | * drive. This function may not be called from IRQ context. The | |
223 | * caller must hold ide_setting_sem. | |
224 | */ | |
225 | ||
226 | static void auto_remove_settings (ide_drive_t *drive) | |
227 | { | |
228 | ide_settings_t *setting; | |
229 | repeat: | |
230 | setting = drive->settings; | |
231 | while (setting) { | |
232 | if (setting->auto_remove) { | |
233 | __ide_remove_setting(drive, setting->name); | |
234 | goto repeat; | |
235 | } | |
236 | setting = setting->next; | |
237 | } | |
238 | } | |
239 | ||
240 | /** | |
241 | * ide_find_setting_by_name - find a drive specific setting | |
242 | * @drive: drive to scan | |
243 | * @name: setting name | |
244 | * | |
245 | * Scan's the device setting table for a matching entry and returns | |
246 | * this or NULL if no entry is found. The caller must hold the | |
247 | * setting semaphore | |
248 | */ | |
249 | ||
250 | static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name) | |
251 | { | |
252 | ide_settings_t *setting = drive->settings; | |
253 | ||
254 | while (setting) { | |
255 | if (strcmp(setting->name, name) == 0) | |
256 | break; | |
257 | setting = setting->next; | |
258 | } | |
259 | return setting; | |
260 | } | |
261 | ||
262 | /** | |
263 | * ide_read_setting - read an IDE setting | |
264 | * @drive: drive to read from | |
265 | * @setting: drive setting | |
266 | * | |
267 | * Read a drive setting and return the value. The caller | |
268 | * must hold the ide_setting_sem when making this call. | |
269 | * | |
270 | * BUGS: the data return and error are the same return value | |
271 | * so an error -EINVAL and true return of the same value cannot | |
272 | * be told apart | |
273 | */ | |
274 | ||
275 | static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting) | |
276 | { | |
277 | int val = -EINVAL; | |
278 | unsigned long flags; | |
279 | ||
280 | if ((setting->rw & SETTING_READ)) { | |
281 | spin_lock_irqsave(&ide_lock, flags); | |
282 | switch(setting->data_type) { | |
283 | case TYPE_BYTE: | |
284 | val = *((u8 *) setting->data); | |
285 | break; | |
286 | case TYPE_SHORT: | |
287 | val = *((u16 *) setting->data); | |
288 | break; | |
289 | case TYPE_INT: | |
290 | val = *((u32 *) setting->data); | |
291 | break; | |
292 | } | |
293 | spin_unlock_irqrestore(&ide_lock, flags); | |
294 | } | |
295 | return val; | |
296 | } | |
297 | ||
298 | /** | |
299 | * ide_write_setting - read an IDE setting | |
300 | * @drive: drive to read from | |
301 | * @setting: drive setting | |
302 | * @val: value | |
303 | * | |
304 | * Write a drive setting if it is possible. The caller | |
305 | * must hold the ide_setting_sem when making this call. | |
306 | * | |
307 | * BUGS: the data return and error are the same return value | |
308 | * so an error -EINVAL and true return of the same value cannot | |
309 | * be told apart | |
310 | * | |
311 | * FIXME: This should be changed to enqueue a special request | |
312 | * to the driver to change settings, and then wait on a sema for completion. | |
313 | * The current scheme of polling is kludgy, though safe enough. | |
314 | */ | |
315 | ||
316 | static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val) | |
317 | { | |
318 | if (!capable(CAP_SYS_ADMIN)) | |
319 | return -EACCES; | |
320 | if (setting->set) | |
321 | return setting->set(drive, val); | |
322 | if (!(setting->rw & SETTING_WRITE)) | |
323 | return -EPERM; | |
324 | if (val < setting->min || val > setting->max) | |
325 | return -EINVAL; | |
326 | if (ide_spin_wait_hwgroup(drive)) | |
327 | return -EBUSY; | |
328 | switch (setting->data_type) { | |
329 | case TYPE_BYTE: | |
330 | *((u8 *) setting->data) = val; | |
331 | break; | |
332 | case TYPE_SHORT: | |
333 | *((u16 *) setting->data) = val; | |
334 | break; | |
335 | case TYPE_INT: | |
336 | *((u32 *) setting->data) = val; | |
337 | break; | |
338 | } | |
339 | spin_unlock_irq(&ide_lock); | |
340 | return 0; | |
341 | } | |
342 | ||
343 | static int set_xfer_rate (ide_drive_t *drive, int arg) | |
344 | { | |
345 | int err; | |
346 | ||
347 | if (arg < 0 || arg > 70) | |
348 | return -EINVAL; | |
349 | ||
350 | err = ide_wait_cmd(drive, | |
351 | WIN_SETFEATURES, (u8) arg, | |
352 | SETFEATURES_XFER, 0, NULL); | |
353 | ||
354 | if (!err && arg) { | |
355 | ide_set_xfer_rate(drive, (u8) arg); | |
356 | ide_driveid_update(drive); | |
357 | } | |
358 | return err; | |
359 | } | |
360 | ||
361 | /** | |
362 | * ide_add_generic_settings - generic ide settings | |
363 | * @drive: drive being configured | |
364 | * | |
365 | * Add the generic parts of the system settings to the /proc files. | |
366 | * The caller must not be holding the ide_setting_sem. | |
367 | */ | |
368 | ||
369 | void ide_add_generic_settings (ide_drive_t *drive) | |
370 | { | |
371 | /* | |
372 | * drive setting name read/write access data type min max mul_factor div_factor data pointer set function | |
373 | */ | |
374 | __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); | |
375 | __ide_add_setting(drive, "keepsettings", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0); | |
376 | __ide_add_setting(drive, "nice1", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0); | |
377 | __ide_add_setting(drive, "pio_mode", SETTING_WRITE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0); | |
378 | __ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0); | |
379 | __ide_add_setting(drive, "using_dma", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0); | |
380 | __ide_add_setting(drive, "init_speed", SETTING_RW, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0); | |
381 | __ide_add_setting(drive, "current_speed", SETTING_RW, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0); | |
382 | __ide_add_setting(drive, "number", SETTING_RW, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0); | |
383 | } | |
384 | ||
1da177e4 LT |
385 | static void proc_ide_settings_warn(void) |
386 | { | |
387 | static int warned = 0; | |
388 | ||
389 | if (warned) | |
390 | return; | |
391 | ||
392 | printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is " | |
393 | "obsolete, and will be removed soon!\n"); | |
394 | warned = 1; | |
395 | } | |
396 | ||
397 | static int proc_ide_read_settings | |
398 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
399 | { | |
400 | ide_drive_t *drive = (ide_drive_t *) data; | |
401 | ide_settings_t *setting = (ide_settings_t *) drive->settings; | |
402 | char *out = page; | |
403 | int len, rc, mul_factor, div_factor; | |
404 | ||
405 | proc_ide_settings_warn(); | |
406 | ||
407 | down(&ide_setting_sem); | |
408 | out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n"); | |
409 | out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n"); | |
410 | while(setting) { | |
411 | mul_factor = setting->mul_factor; | |
412 | div_factor = setting->div_factor; | |
413 | out += sprintf(out, "%-24s", setting->name); | |
414 | if ((rc = ide_read_setting(drive, setting)) >= 0) | |
415 | out += sprintf(out, "%-16d", rc * mul_factor / div_factor); | |
416 | else | |
417 | out += sprintf(out, "%-16s", "write-only"); | |
418 | out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor); | |
419 | if (setting->rw & SETTING_READ) | |
420 | out += sprintf(out, "r"); | |
421 | if (setting->rw & SETTING_WRITE) | |
422 | out += sprintf(out, "w"); | |
423 | out += sprintf(out, "\n"); | |
424 | setting = setting->next; | |
425 | } | |
426 | len = out - page; | |
427 | up(&ide_setting_sem); | |
428 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
429 | } | |
430 | ||
431 | #define MAX_LEN 30 | |
432 | ||
433 | static int proc_ide_write_settings(struct file *file, const char __user *buffer, | |
434 | unsigned long count, void *data) | |
435 | { | |
436 | ide_drive_t *drive = (ide_drive_t *) data; | |
437 | char name[MAX_LEN + 1]; | |
438 | int for_real = 0; | |
439 | unsigned long n; | |
440 | ide_settings_t *setting; | |
441 | char *buf, *s; | |
442 | ||
443 | if (!capable(CAP_SYS_ADMIN)) | |
444 | return -EACCES; | |
445 | ||
446 | proc_ide_settings_warn(); | |
447 | ||
448 | if (count >= PAGE_SIZE) | |
449 | return -EINVAL; | |
450 | ||
451 | s = buf = (char *)__get_free_page(GFP_USER); | |
452 | if (!buf) | |
453 | return -ENOMEM; | |
454 | ||
455 | if (copy_from_user(buf, buffer, count)) { | |
456 | free_page((unsigned long)buf); | |
457 | return -EFAULT; | |
458 | } | |
459 | ||
460 | buf[count] = '\0'; | |
461 | ||
462 | /* | |
463 | * Skip over leading whitespace | |
464 | */ | |
465 | while (count && isspace(*s)) { | |
466 | --count; | |
467 | ++s; | |
468 | } | |
469 | /* | |
470 | * Do one full pass to verify all parameters, | |
471 | * then do another to actually write the new settings. | |
472 | */ | |
473 | do { | |
474 | char *p = s; | |
475 | n = count; | |
476 | while (n > 0) { | |
477 | unsigned val; | |
478 | char *q = p; | |
479 | ||
480 | while (n > 0 && *p != ':') { | |
481 | --n; | |
482 | p++; | |
483 | } | |
484 | if (*p != ':') | |
485 | goto parse_error; | |
486 | if (p - q > MAX_LEN) | |
487 | goto parse_error; | |
488 | memcpy(name, q, p - q); | |
489 | name[p - q] = 0; | |
490 | ||
491 | if (n > 0) { | |
492 | --n; | |
493 | p++; | |
494 | } else | |
495 | goto parse_error; | |
496 | ||
497 | val = simple_strtoul(p, &q, 10); | |
498 | n -= q - p; | |
499 | p = q; | |
500 | if (n > 0 && !isspace(*p)) | |
501 | goto parse_error; | |
502 | while (n > 0 && isspace(*p)) { | |
503 | --n; | |
504 | ++p; | |
505 | } | |
506 | ||
507 | down(&ide_setting_sem); | |
508 | setting = ide_find_setting_by_name(drive, name); | |
509 | if (!setting) | |
510 | { | |
511 | up(&ide_setting_sem); | |
512 | goto parse_error; | |
513 | } | |
514 | if (for_real) | |
515 | ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor); | |
516 | up(&ide_setting_sem); | |
517 | } | |
518 | } while (!for_real++); | |
519 | free_page((unsigned long)buf); | |
520 | return count; | |
521 | parse_error: | |
522 | free_page((unsigned long)buf); | |
523 | printk("proc_ide_write_settings(): parse error\n"); | |
524 | return -EINVAL; | |
525 | } | |
526 | ||
527 | int proc_ide_read_capacity | |
528 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
529 | { | |
530 | int len = sprintf(page,"%llu\n", (long long)0x7fffffff); | |
531 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
532 | } | |
533 | ||
534 | EXPORT_SYMBOL_GPL(proc_ide_read_capacity); | |
535 | ||
536 | int proc_ide_read_geometry | |
537 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
538 | { | |
539 | ide_drive_t *drive = (ide_drive_t *) data; | |
540 | char *out = page; | |
541 | int len; | |
542 | ||
543 | out += sprintf(out,"physical %d/%d/%d\n", | |
544 | drive->cyl, drive->head, drive->sect); | |
545 | out += sprintf(out,"logical %d/%d/%d\n", | |
546 | drive->bios_cyl, drive->bios_head, drive->bios_sect); | |
547 | ||
548 | len = out - page; | |
549 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
550 | } | |
551 | ||
552 | EXPORT_SYMBOL(proc_ide_read_geometry); | |
553 | ||
554 | static int proc_ide_read_dmodel | |
555 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
556 | { | |
557 | ide_drive_t *drive = (ide_drive_t *) data; | |
558 | struct hd_driveid *id = drive->id; | |
559 | int len; | |
560 | ||
561 | len = sprintf(page, "%.40s\n", | |
562 | (id && id->model[0]) ? (char *)id->model : "(none)"); | |
563 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
564 | } | |
565 | ||
566 | static int proc_ide_read_driver | |
567 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
568 | { | |
569 | ide_drive_t *drive = (ide_drive_t *) data; | |
8604affd BZ |
570 | struct device *dev = &drive->gendev; |
571 | ide_driver_t *ide_drv; | |
1da177e4 LT |
572 | int len; |
573 | ||
8604affd BZ |
574 | if (dev->driver) { |
575 | ide_drv = container_of(dev->driver, ide_driver_t, gen_driver); | |
1da177e4 | 576 | len = sprintf(page, "%s version %s\n", |
8604affd | 577 | dev->driver->name, ide_drv->version); |
1da177e4 LT |
578 | } else |
579 | len = sprintf(page, "ide-default version 0.9.newide\n"); | |
580 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
581 | } | |
582 | ||
8604affd BZ |
583 | static int ide_replace_subdriver(ide_drive_t *drive, const char *driver) |
584 | { | |
585 | struct device *dev = &drive->gendev; | |
586 | int ret = 1; | |
349ae23f | 587 | int err; |
8604affd | 588 | |
8604affd BZ |
589 | device_release_driver(dev); |
590 | /* FIXME: device can still be in use by previous driver */ | |
591 | strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); | |
349ae23f RD |
592 | err = device_attach(dev); |
593 | if (err < 0) | |
594 | printk(KERN_WARNING "IDE: %s: device_attach error: %d\n", | |
595 | __FUNCTION__, err); | |
8604affd | 596 | drive->driver_req[0] = 0; |
349ae23f RD |
597 | if (dev->driver == NULL) { |
598 | err = device_attach(dev); | |
599 | if (err < 0) | |
600 | printk(KERN_WARNING | |
601 | "IDE: %s: device_attach(2) error: %d\n", | |
602 | __FUNCTION__, err); | |
603 | } | |
8604affd BZ |
604 | if (dev->driver && !strcmp(dev->driver->name, driver)) |
605 | ret = 0; | |
8604affd BZ |
606 | |
607 | return ret; | |
608 | } | |
609 | ||
1da177e4 LT |
610 | static int proc_ide_write_driver |
611 | (struct file *file, const char __user *buffer, unsigned long count, void *data) | |
612 | { | |
613 | ide_drive_t *drive = (ide_drive_t *) data; | |
614 | char name[32]; | |
615 | ||
616 | if (!capable(CAP_SYS_ADMIN)) | |
617 | return -EACCES; | |
618 | if (count > 31) | |
619 | count = 31; | |
620 | if (copy_from_user(name, buffer, count)) | |
621 | return -EFAULT; | |
622 | name[count] = '\0'; | |
623 | if (ide_replace_subdriver(drive, name)) | |
624 | return -EINVAL; | |
625 | return count; | |
626 | } | |
627 | ||
628 | static int proc_ide_read_media | |
629 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
630 | { | |
631 | ide_drive_t *drive = (ide_drive_t *) data; | |
632 | const char *media; | |
633 | int len; | |
634 | ||
635 | switch (drive->media) { | |
636 | case ide_disk: media = "disk\n"; | |
637 | break; | |
638 | case ide_cdrom: media = "cdrom\n"; | |
639 | break; | |
640 | case ide_tape: media = "tape\n"; | |
641 | break; | |
642 | case ide_floppy:media = "floppy\n"; | |
643 | break; | |
4495c9e5 AD |
644 | case ide_optical:media = "optical\n"; |
645 | break; | |
1da177e4 LT |
646 | default: media = "UNKNOWN\n"; |
647 | break; | |
648 | } | |
649 | strcpy(page,media); | |
650 | len = strlen(media); | |
651 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
652 | } | |
653 | ||
654 | static ide_proc_entry_t generic_drive_entries[] = { | |
655 | { "driver", S_IFREG|S_IRUGO, proc_ide_read_driver, proc_ide_write_driver }, | |
656 | { "identify", S_IFREG|S_IRUSR, proc_ide_read_identify, NULL }, | |
657 | { "media", S_IFREG|S_IRUGO, proc_ide_read_media, NULL }, | |
658 | { "model", S_IFREG|S_IRUGO, proc_ide_read_dmodel, NULL }, | |
659 | { "settings", S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings }, | |
660 | { NULL, 0, NULL, NULL } | |
661 | }; | |
662 | ||
7662d046 | 663 | static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data) |
1da177e4 LT |
664 | { |
665 | struct proc_dir_entry *ent; | |
666 | ||
667 | if (!dir || !p) | |
668 | return; | |
669 | while (p->name != NULL) { | |
670 | ent = create_proc_entry(p->name, p->mode, dir); | |
671 | if (!ent) return; | |
1da177e4 LT |
672 | ent->data = data; |
673 | ent->read_proc = p->read_proc; | |
674 | ent->write_proc = p->write_proc; | |
675 | p++; | |
676 | } | |
677 | } | |
678 | ||
7662d046 | 679 | static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) |
1da177e4 LT |
680 | { |
681 | if (!dir || !p) | |
682 | return; | |
683 | while (p->name != NULL) { | |
684 | remove_proc_entry(p->name, dir); | |
685 | p++; | |
686 | } | |
687 | } | |
688 | ||
7662d046 BZ |
689 | void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) |
690 | { | |
691 | ide_add_proc_entries(drive->proc, driver->proc, drive); | |
692 | } | |
693 | ||
694 | EXPORT_SYMBOL(ide_proc_register_driver); | |
695 | ||
696 | /** | |
697 | * ide_proc_unregister_driver - remove driver specific data | |
698 | * @drive: drive | |
699 | * @driver: driver | |
700 | * | |
701 | * Clean up the driver specific /proc files and IDE settings | |
702 | * for a given drive. | |
703 | * | |
704 | * Takes ide_setting_sem and ide_lock. | |
705 | * Caller must hold none of the locks. | |
706 | */ | |
707 | ||
708 | void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) | |
709 | { | |
710 | unsigned long flags; | |
711 | ||
712 | ide_remove_proc_entries(drive->proc, driver->proc); | |
713 | ||
714 | down(&ide_setting_sem); | |
715 | spin_lock_irqsave(&ide_lock, flags); | |
716 | /* | |
717 | * ide_setting_sem protects the settings list | |
718 | * ide_lock protects the use of settings | |
719 | * | |
720 | * so we need to hold both, ide_settings_sem because we want to | |
721 | * modify the settings list, and ide_lock because we cannot take | |
722 | * a setting out that is being used. | |
723 | * | |
724 | * OTOH both ide_{read,write}_setting are only ever used under | |
725 | * ide_setting_sem. | |
726 | */ | |
727 | auto_remove_settings(drive); | |
728 | spin_unlock_irqrestore(&ide_lock, flags); | |
729 | up(&ide_setting_sem); | |
730 | } | |
731 | ||
732 | EXPORT_SYMBOL(ide_proc_unregister_driver); | |
733 | ||
1da177e4 LT |
734 | static void create_proc_ide_drives(ide_hwif_t *hwif) |
735 | { | |
736 | int d; | |
737 | struct proc_dir_entry *ent; | |
738 | struct proc_dir_entry *parent = hwif->proc; | |
739 | char name[64]; | |
740 | ||
741 | for (d = 0; d < MAX_DRIVES; d++) { | |
742 | ide_drive_t *drive = &hwif->drives[d]; | |
743 | ||
744 | if (!drive->present) | |
745 | continue; | |
746 | if (drive->proc) | |
747 | continue; | |
748 | ||
749 | drive->proc = proc_mkdir(drive->name, parent); | |
750 | if (drive->proc) | |
751 | ide_add_proc_entries(drive->proc, generic_drive_entries, drive); | |
752 | sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name); | |
753 | ent = proc_symlink(drive->name, proc_ide_root, name); | |
754 | if (!ent) return; | |
755 | } | |
756 | } | |
757 | ||
758 | static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive) | |
759 | { | |
760 | if (drive->proc) { | |
761 | ide_remove_proc_entries(drive->proc, generic_drive_entries); | |
762 | remove_proc_entry(drive->name, proc_ide_root); | |
763 | remove_proc_entry(drive->name, hwif->proc); | |
764 | drive->proc = NULL; | |
765 | } | |
766 | } | |
767 | ||
768 | static void destroy_proc_ide_drives(ide_hwif_t *hwif) | |
769 | { | |
770 | int d; | |
771 | ||
772 | for (d = 0; d < MAX_DRIVES; d++) { | |
773 | ide_drive_t *drive = &hwif->drives[d]; | |
774 | if (drive->proc) | |
775 | destroy_proc_ide_device(hwif, drive); | |
776 | } | |
777 | } | |
778 | ||
779 | static ide_proc_entry_t hwif_entries[] = { | |
780 | { "channel", S_IFREG|S_IRUGO, proc_ide_read_channel, NULL }, | |
781 | { "mate", S_IFREG|S_IRUGO, proc_ide_read_mate, NULL }, | |
782 | { "model", S_IFREG|S_IRUGO, proc_ide_read_imodel, NULL }, | |
783 | { NULL, 0, NULL, NULL } | |
784 | }; | |
785 | ||
786 | void create_proc_ide_interfaces(void) | |
787 | { | |
788 | int h; | |
789 | ||
790 | for (h = 0; h < MAX_HWIFS; h++) { | |
791 | ide_hwif_t *hwif = &ide_hwifs[h]; | |
792 | ||
793 | if (!hwif->present) | |
794 | continue; | |
795 | if (!hwif->proc) { | |
796 | hwif->proc = proc_mkdir(hwif->name, proc_ide_root); | |
797 | if (!hwif->proc) | |
798 | return; | |
799 | ide_add_proc_entries(hwif->proc, hwif_entries, hwif); | |
800 | } | |
801 | create_proc_ide_drives(hwif); | |
802 | } | |
803 | } | |
804 | ||
805 | EXPORT_SYMBOL(create_proc_ide_interfaces); | |
806 | ||
807 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
808 | void ide_pci_create_host_proc(const char *name, get_info_t *get_info) | |
809 | { | |
810 | create_proc_info_entry(name, 0, proc_ide_root, get_info); | |
811 | } | |
812 | ||
813 | EXPORT_SYMBOL_GPL(ide_pci_create_host_proc); | |
814 | #endif | |
815 | ||
816 | void destroy_proc_ide_interface(ide_hwif_t *hwif) | |
817 | { | |
818 | if (hwif->proc) { | |
819 | destroy_proc_ide_drives(hwif); | |
820 | ide_remove_proc_entries(hwif->proc, hwif_entries); | |
821 | remove_proc_entry(hwif->name, proc_ide_root); | |
822 | hwif->proc = NULL; | |
823 | } | |
824 | } | |
825 | ||
8604affd BZ |
826 | static int proc_print_driver(struct device_driver *drv, void *data) |
827 | { | |
828 | ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver); | |
829 | struct seq_file *s = data; | |
830 | ||
831 | seq_printf(s, "%s version %s\n", drv->name, ide_drv->version); | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
836 | static int ide_drivers_show(struct seq_file *s, void *p) | |
837 | { | |
349ae23f RD |
838 | int err; |
839 | ||
840 | err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver); | |
841 | if (err < 0) | |
842 | printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n", | |
843 | __FUNCTION__, err); | |
8604affd BZ |
844 | return 0; |
845 | } | |
846 | ||
1da177e4 LT |
847 | static int ide_drivers_open(struct inode *inode, struct file *file) |
848 | { | |
8604affd | 849 | return single_open(file, &ide_drivers_show, NULL); |
1da177e4 | 850 | } |
8604affd | 851 | |
2b8693c0 | 852 | static const struct file_operations ide_drivers_operations = { |
1da177e4 LT |
853 | .open = ide_drivers_open, |
854 | .read = seq_read, | |
855 | .llseek = seq_lseek, | |
8604affd | 856 | .release = single_release, |
1da177e4 LT |
857 | }; |
858 | ||
859 | void proc_ide_create(void) | |
860 | { | |
861 | struct proc_dir_entry *entry; | |
862 | ||
863 | if (!proc_ide_root) | |
864 | return; | |
865 | ||
866 | create_proc_ide_interfaces(); | |
867 | ||
868 | entry = create_proc_entry("drivers", 0, proc_ide_root); | |
869 | if (entry) | |
870 | entry->proc_fops = &ide_drivers_operations; | |
871 | } | |
872 | ||
873 | void proc_ide_destroy(void) | |
874 | { | |
643bdc6f | 875 | remove_proc_entry("drivers", proc_ide_root); |
1da177e4 LT |
876 | remove_proc_entry("ide", NULL); |
877 | } |