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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> | |
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/config.h> | |
26 | #include <linux/module.h> | |
27 | ||
28 | #include <asm/uaccess.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/sched.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 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 | ||
126 | static void proc_ide_settings_warn(void) | |
127 | { | |
128 | static int warned = 0; | |
129 | ||
130 | if (warned) | |
131 | return; | |
132 | ||
133 | printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is " | |
134 | "obsolete, and will be removed soon!\n"); | |
135 | warned = 1; | |
136 | } | |
137 | ||
138 | static int proc_ide_read_settings | |
139 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
140 | { | |
141 | ide_drive_t *drive = (ide_drive_t *) data; | |
142 | ide_settings_t *setting = (ide_settings_t *) drive->settings; | |
143 | char *out = page; | |
144 | int len, rc, mul_factor, div_factor; | |
145 | ||
146 | proc_ide_settings_warn(); | |
147 | ||
148 | down(&ide_setting_sem); | |
149 | out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n"); | |
150 | out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n"); | |
151 | while(setting) { | |
152 | mul_factor = setting->mul_factor; | |
153 | div_factor = setting->div_factor; | |
154 | out += sprintf(out, "%-24s", setting->name); | |
155 | if ((rc = ide_read_setting(drive, setting)) >= 0) | |
156 | out += sprintf(out, "%-16d", rc * mul_factor / div_factor); | |
157 | else | |
158 | out += sprintf(out, "%-16s", "write-only"); | |
159 | out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor); | |
160 | if (setting->rw & SETTING_READ) | |
161 | out += sprintf(out, "r"); | |
162 | if (setting->rw & SETTING_WRITE) | |
163 | out += sprintf(out, "w"); | |
164 | out += sprintf(out, "\n"); | |
165 | setting = setting->next; | |
166 | } | |
167 | len = out - page; | |
168 | up(&ide_setting_sem); | |
169 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
170 | } | |
171 | ||
172 | #define MAX_LEN 30 | |
173 | ||
174 | static int proc_ide_write_settings(struct file *file, const char __user *buffer, | |
175 | unsigned long count, void *data) | |
176 | { | |
177 | ide_drive_t *drive = (ide_drive_t *) data; | |
178 | char name[MAX_LEN + 1]; | |
179 | int for_real = 0; | |
180 | unsigned long n; | |
181 | ide_settings_t *setting; | |
182 | char *buf, *s; | |
183 | ||
184 | if (!capable(CAP_SYS_ADMIN)) | |
185 | return -EACCES; | |
186 | ||
187 | proc_ide_settings_warn(); | |
188 | ||
189 | if (count >= PAGE_SIZE) | |
190 | return -EINVAL; | |
191 | ||
192 | s = buf = (char *)__get_free_page(GFP_USER); | |
193 | if (!buf) | |
194 | return -ENOMEM; | |
195 | ||
196 | if (copy_from_user(buf, buffer, count)) { | |
197 | free_page((unsigned long)buf); | |
198 | return -EFAULT; | |
199 | } | |
200 | ||
201 | buf[count] = '\0'; | |
202 | ||
203 | /* | |
204 | * Skip over leading whitespace | |
205 | */ | |
206 | while (count && isspace(*s)) { | |
207 | --count; | |
208 | ++s; | |
209 | } | |
210 | /* | |
211 | * Do one full pass to verify all parameters, | |
212 | * then do another to actually write the new settings. | |
213 | */ | |
214 | do { | |
215 | char *p = s; | |
216 | n = count; | |
217 | while (n > 0) { | |
218 | unsigned val; | |
219 | char *q = p; | |
220 | ||
221 | while (n > 0 && *p != ':') { | |
222 | --n; | |
223 | p++; | |
224 | } | |
225 | if (*p != ':') | |
226 | goto parse_error; | |
227 | if (p - q > MAX_LEN) | |
228 | goto parse_error; | |
229 | memcpy(name, q, p - q); | |
230 | name[p - q] = 0; | |
231 | ||
232 | if (n > 0) { | |
233 | --n; | |
234 | p++; | |
235 | } else | |
236 | goto parse_error; | |
237 | ||
238 | val = simple_strtoul(p, &q, 10); | |
239 | n -= q - p; | |
240 | p = q; | |
241 | if (n > 0 && !isspace(*p)) | |
242 | goto parse_error; | |
243 | while (n > 0 && isspace(*p)) { | |
244 | --n; | |
245 | ++p; | |
246 | } | |
247 | ||
248 | down(&ide_setting_sem); | |
249 | setting = ide_find_setting_by_name(drive, name); | |
250 | if (!setting) | |
251 | { | |
252 | up(&ide_setting_sem); | |
253 | goto parse_error; | |
254 | } | |
255 | if (for_real) | |
256 | ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor); | |
257 | up(&ide_setting_sem); | |
258 | } | |
259 | } while (!for_real++); | |
260 | free_page((unsigned long)buf); | |
261 | return count; | |
262 | parse_error: | |
263 | free_page((unsigned long)buf); | |
264 | printk("proc_ide_write_settings(): parse error\n"); | |
265 | return -EINVAL; | |
266 | } | |
267 | ||
268 | int proc_ide_read_capacity | |
269 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
270 | { | |
271 | int len = sprintf(page,"%llu\n", (long long)0x7fffffff); | |
272 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
273 | } | |
274 | ||
275 | EXPORT_SYMBOL_GPL(proc_ide_read_capacity); | |
276 | ||
277 | int proc_ide_read_geometry | |
278 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
279 | { | |
280 | ide_drive_t *drive = (ide_drive_t *) data; | |
281 | char *out = page; | |
282 | int len; | |
283 | ||
284 | out += sprintf(out,"physical %d/%d/%d\n", | |
285 | drive->cyl, drive->head, drive->sect); | |
286 | out += sprintf(out,"logical %d/%d/%d\n", | |
287 | drive->bios_cyl, drive->bios_head, drive->bios_sect); | |
288 | ||
289 | len = out - page; | |
290 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
291 | } | |
292 | ||
293 | EXPORT_SYMBOL(proc_ide_read_geometry); | |
294 | ||
295 | static int proc_ide_read_dmodel | |
296 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
297 | { | |
298 | ide_drive_t *drive = (ide_drive_t *) data; | |
299 | struct hd_driveid *id = drive->id; | |
300 | int len; | |
301 | ||
302 | len = sprintf(page, "%.40s\n", | |
303 | (id && id->model[0]) ? (char *)id->model : "(none)"); | |
304 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
305 | } | |
306 | ||
307 | static int proc_ide_read_driver | |
308 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
309 | { | |
310 | ide_drive_t *drive = (ide_drive_t *) data; | |
8604affd BZ |
311 | struct device *dev = &drive->gendev; |
312 | ide_driver_t *ide_drv; | |
1da177e4 LT |
313 | int len; |
314 | ||
8604affd BZ |
315 | down_read(&dev->bus->subsys.rwsem); |
316 | if (dev->driver) { | |
317 | ide_drv = container_of(dev->driver, ide_driver_t, gen_driver); | |
1da177e4 | 318 | len = sprintf(page, "%s version %s\n", |
8604affd | 319 | dev->driver->name, ide_drv->version); |
1da177e4 LT |
320 | } else |
321 | len = sprintf(page, "ide-default version 0.9.newide\n"); | |
8604affd | 322 | up_read(&dev->bus->subsys.rwsem); |
1da177e4 LT |
323 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); |
324 | } | |
325 | ||
8604affd BZ |
326 | static int ide_replace_subdriver(ide_drive_t *drive, const char *driver) |
327 | { | |
328 | struct device *dev = &drive->gendev; | |
329 | int ret = 1; | |
330 | ||
331 | down_write(&dev->bus->subsys.rwsem); | |
332 | device_release_driver(dev); | |
333 | /* FIXME: device can still be in use by previous driver */ | |
334 | strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); | |
335 | device_attach(dev); | |
336 | drive->driver_req[0] = 0; | |
337 | if (dev->driver == NULL) | |
338 | device_attach(dev); | |
339 | if (dev->driver && !strcmp(dev->driver->name, driver)) | |
340 | ret = 0; | |
341 | up_write(&dev->bus->subsys.rwsem); | |
342 | ||
343 | return ret; | |
344 | } | |
345 | ||
1da177e4 LT |
346 | static int proc_ide_write_driver |
347 | (struct file *file, const char __user *buffer, unsigned long count, void *data) | |
348 | { | |
349 | ide_drive_t *drive = (ide_drive_t *) data; | |
350 | char name[32]; | |
351 | ||
352 | if (!capable(CAP_SYS_ADMIN)) | |
353 | return -EACCES; | |
354 | if (count > 31) | |
355 | count = 31; | |
356 | if (copy_from_user(name, buffer, count)) | |
357 | return -EFAULT; | |
358 | name[count] = '\0'; | |
359 | if (ide_replace_subdriver(drive, name)) | |
360 | return -EINVAL; | |
361 | return count; | |
362 | } | |
363 | ||
364 | static int proc_ide_read_media | |
365 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
366 | { | |
367 | ide_drive_t *drive = (ide_drive_t *) data; | |
368 | const char *media; | |
369 | int len; | |
370 | ||
371 | switch (drive->media) { | |
372 | case ide_disk: media = "disk\n"; | |
373 | break; | |
374 | case ide_cdrom: media = "cdrom\n"; | |
375 | break; | |
376 | case ide_tape: media = "tape\n"; | |
377 | break; | |
378 | case ide_floppy:media = "floppy\n"; | |
379 | break; | |
380 | default: media = "UNKNOWN\n"; | |
381 | break; | |
382 | } | |
383 | strcpy(page,media); | |
384 | len = strlen(media); | |
385 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
386 | } | |
387 | ||
388 | static ide_proc_entry_t generic_drive_entries[] = { | |
389 | { "driver", S_IFREG|S_IRUGO, proc_ide_read_driver, proc_ide_write_driver }, | |
390 | { "identify", S_IFREG|S_IRUSR, proc_ide_read_identify, NULL }, | |
391 | { "media", S_IFREG|S_IRUGO, proc_ide_read_media, NULL }, | |
392 | { "model", S_IFREG|S_IRUGO, proc_ide_read_dmodel, NULL }, | |
393 | { "settings", S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings }, | |
394 | { NULL, 0, NULL, NULL } | |
395 | }; | |
396 | ||
397 | void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data) | |
398 | { | |
399 | struct proc_dir_entry *ent; | |
400 | ||
401 | if (!dir || !p) | |
402 | return; | |
403 | while (p->name != NULL) { | |
404 | ent = create_proc_entry(p->name, p->mode, dir); | |
405 | if (!ent) return; | |
406 | ent->nlink = 1; | |
407 | ent->data = data; | |
408 | ent->read_proc = p->read_proc; | |
409 | ent->write_proc = p->write_proc; | |
410 | p++; | |
411 | } | |
412 | } | |
413 | ||
414 | void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) | |
415 | { | |
416 | if (!dir || !p) | |
417 | return; | |
418 | while (p->name != NULL) { | |
419 | remove_proc_entry(p->name, dir); | |
420 | p++; | |
421 | } | |
422 | } | |
423 | ||
424 | static void create_proc_ide_drives(ide_hwif_t *hwif) | |
425 | { | |
426 | int d; | |
427 | struct proc_dir_entry *ent; | |
428 | struct proc_dir_entry *parent = hwif->proc; | |
429 | char name[64]; | |
430 | ||
431 | for (d = 0; d < MAX_DRIVES; d++) { | |
432 | ide_drive_t *drive = &hwif->drives[d]; | |
433 | ||
434 | if (!drive->present) | |
435 | continue; | |
436 | if (drive->proc) | |
437 | continue; | |
438 | ||
439 | drive->proc = proc_mkdir(drive->name, parent); | |
440 | if (drive->proc) | |
441 | ide_add_proc_entries(drive->proc, generic_drive_entries, drive); | |
442 | sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name); | |
443 | ent = proc_symlink(drive->name, proc_ide_root, name); | |
444 | if (!ent) return; | |
445 | } | |
446 | } | |
447 | ||
448 | static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive) | |
449 | { | |
450 | if (drive->proc) { | |
451 | ide_remove_proc_entries(drive->proc, generic_drive_entries); | |
452 | remove_proc_entry(drive->name, proc_ide_root); | |
453 | remove_proc_entry(drive->name, hwif->proc); | |
454 | drive->proc = NULL; | |
455 | } | |
456 | } | |
457 | ||
458 | static void destroy_proc_ide_drives(ide_hwif_t *hwif) | |
459 | { | |
460 | int d; | |
461 | ||
462 | for (d = 0; d < MAX_DRIVES; d++) { | |
463 | ide_drive_t *drive = &hwif->drives[d]; | |
464 | if (drive->proc) | |
465 | destroy_proc_ide_device(hwif, drive); | |
466 | } | |
467 | } | |
468 | ||
469 | static ide_proc_entry_t hwif_entries[] = { | |
470 | { "channel", S_IFREG|S_IRUGO, proc_ide_read_channel, NULL }, | |
471 | { "mate", S_IFREG|S_IRUGO, proc_ide_read_mate, NULL }, | |
472 | { "model", S_IFREG|S_IRUGO, proc_ide_read_imodel, NULL }, | |
473 | { NULL, 0, NULL, NULL } | |
474 | }; | |
475 | ||
476 | void create_proc_ide_interfaces(void) | |
477 | { | |
478 | int h; | |
479 | ||
480 | for (h = 0; h < MAX_HWIFS; h++) { | |
481 | ide_hwif_t *hwif = &ide_hwifs[h]; | |
482 | ||
483 | if (!hwif->present) | |
484 | continue; | |
485 | if (!hwif->proc) { | |
486 | hwif->proc = proc_mkdir(hwif->name, proc_ide_root); | |
487 | if (!hwif->proc) | |
488 | return; | |
489 | ide_add_proc_entries(hwif->proc, hwif_entries, hwif); | |
490 | } | |
491 | create_proc_ide_drives(hwif); | |
492 | } | |
493 | } | |
494 | ||
495 | EXPORT_SYMBOL(create_proc_ide_interfaces); | |
496 | ||
497 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
498 | void ide_pci_create_host_proc(const char *name, get_info_t *get_info) | |
499 | { | |
500 | create_proc_info_entry(name, 0, proc_ide_root, get_info); | |
501 | } | |
502 | ||
503 | EXPORT_SYMBOL_GPL(ide_pci_create_host_proc); | |
504 | #endif | |
505 | ||
506 | void destroy_proc_ide_interface(ide_hwif_t *hwif) | |
507 | { | |
508 | if (hwif->proc) { | |
509 | destroy_proc_ide_drives(hwif); | |
510 | ide_remove_proc_entries(hwif->proc, hwif_entries); | |
511 | remove_proc_entry(hwif->name, proc_ide_root); | |
512 | hwif->proc = NULL; | |
513 | } | |
514 | } | |
515 | ||
8604affd BZ |
516 | static int proc_print_driver(struct device_driver *drv, void *data) |
517 | { | |
518 | ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver); | |
519 | struct seq_file *s = data; | |
520 | ||
521 | seq_printf(s, "%s version %s\n", drv->name, ide_drv->version); | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | static int ide_drivers_show(struct seq_file *s, void *p) | |
527 | { | |
528 | bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver); | |
529 | return 0; | |
530 | } | |
531 | ||
1da177e4 LT |
532 | static int ide_drivers_open(struct inode *inode, struct file *file) |
533 | { | |
8604affd | 534 | return single_open(file, &ide_drivers_show, NULL); |
1da177e4 | 535 | } |
8604affd | 536 | |
1da177e4 LT |
537 | static struct file_operations ide_drivers_operations = { |
538 | .open = ide_drivers_open, | |
539 | .read = seq_read, | |
540 | .llseek = seq_lseek, | |
8604affd | 541 | .release = single_release, |
1da177e4 LT |
542 | }; |
543 | ||
544 | void proc_ide_create(void) | |
545 | { | |
546 | struct proc_dir_entry *entry; | |
547 | ||
548 | if (!proc_ide_root) | |
549 | return; | |
550 | ||
551 | create_proc_ide_interfaces(); | |
552 | ||
553 | entry = create_proc_entry("drivers", 0, proc_ide_root); | |
554 | if (entry) | |
555 | entry->proc_fops = &ide_drivers_operations; | |
556 | } | |
557 | ||
558 | void proc_ide_destroy(void) | |
559 | { | |
643bdc6f | 560 | remove_proc_entry("drivers", proc_ide_root); |
1da177e4 LT |
561 | remove_proc_entry("ide", NULL); |
562 | } |