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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; | |
67 | default: name = "(unknown)"; break; | |
68 | } | |
69 | len = sprintf(page, "%s\n", name); | |
70 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
71 | } | |
72 | ||
73 | static int proc_ide_read_mate | |
74 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
75 | { | |
76 | ide_hwif_t *hwif = (ide_hwif_t *) data; | |
77 | int len; | |
78 | ||
79 | if (hwif && hwif->mate && hwif->mate->present) | |
80 | len = sprintf(page, "%s\n", hwif->mate->name); | |
81 | else | |
82 | len = sprintf(page, "(none)\n"); | |
83 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
84 | } | |
85 | ||
86 | static int proc_ide_read_channel | |
87 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
88 | { | |
89 | ide_hwif_t *hwif = (ide_hwif_t *) data; | |
90 | int len; | |
91 | ||
92 | page[0] = hwif->channel ? '1' : '0'; | |
93 | page[1] = '\n'; | |
94 | len = 2; | |
95 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
96 | } | |
97 | ||
98 | static int proc_ide_read_identify | |
99 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
100 | { | |
101 | ide_drive_t *drive = (ide_drive_t *)data; | |
102 | int len = 0, i = 0; | |
103 | int err = 0; | |
104 | ||
105 | len = sprintf(page, "\n"); | |
106 | ||
107 | if (drive) { | |
108 | unsigned short *val = (unsigned short *) page; | |
109 | ||
110 | err = taskfile_lib_get_identify(drive, page); | |
111 | if (!err) { | |
112 | char *out = ((char *)page) + (SECTOR_WORDS * 4); | |
113 | page = out; | |
114 | do { | |
115 | out += sprintf(out, "%04x%c", | |
116 | le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); | |
117 | val += 1; | |
118 | } while (i < (SECTOR_WORDS * 2)); | |
119 | len = out - page; | |
120 | } | |
121 | } | |
122 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
123 | } | |
124 | ||
125 | static void proc_ide_settings_warn(void) | |
126 | { | |
127 | static int warned = 0; | |
128 | ||
129 | if (warned) | |
130 | return; | |
131 | ||
132 | printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is " | |
133 | "obsolete, and will be removed soon!\n"); | |
134 | warned = 1; | |
135 | } | |
136 | ||
137 | static int proc_ide_read_settings | |
138 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
139 | { | |
140 | ide_drive_t *drive = (ide_drive_t *) data; | |
141 | ide_settings_t *setting = (ide_settings_t *) drive->settings; | |
142 | char *out = page; | |
143 | int len, rc, mul_factor, div_factor; | |
144 | ||
145 | proc_ide_settings_warn(); | |
146 | ||
147 | down(&ide_setting_sem); | |
148 | out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n"); | |
149 | out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n"); | |
150 | while(setting) { | |
151 | mul_factor = setting->mul_factor; | |
152 | div_factor = setting->div_factor; | |
153 | out += sprintf(out, "%-24s", setting->name); | |
154 | if ((rc = ide_read_setting(drive, setting)) >= 0) | |
155 | out += sprintf(out, "%-16d", rc * mul_factor / div_factor); | |
156 | else | |
157 | out += sprintf(out, "%-16s", "write-only"); | |
158 | out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor); | |
159 | if (setting->rw & SETTING_READ) | |
160 | out += sprintf(out, "r"); | |
161 | if (setting->rw & SETTING_WRITE) | |
162 | out += sprintf(out, "w"); | |
163 | out += sprintf(out, "\n"); | |
164 | setting = setting->next; | |
165 | } | |
166 | len = out - page; | |
167 | up(&ide_setting_sem); | |
168 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
169 | } | |
170 | ||
171 | #define MAX_LEN 30 | |
172 | ||
173 | static int proc_ide_write_settings(struct file *file, const char __user *buffer, | |
174 | unsigned long count, void *data) | |
175 | { | |
176 | ide_drive_t *drive = (ide_drive_t *) data; | |
177 | char name[MAX_LEN + 1]; | |
178 | int for_real = 0; | |
179 | unsigned long n; | |
180 | ide_settings_t *setting; | |
181 | char *buf, *s; | |
182 | ||
183 | if (!capable(CAP_SYS_ADMIN)) | |
184 | return -EACCES; | |
185 | ||
186 | proc_ide_settings_warn(); | |
187 | ||
188 | if (count >= PAGE_SIZE) | |
189 | return -EINVAL; | |
190 | ||
191 | s = buf = (char *)__get_free_page(GFP_USER); | |
192 | if (!buf) | |
193 | return -ENOMEM; | |
194 | ||
195 | if (copy_from_user(buf, buffer, count)) { | |
196 | free_page((unsigned long)buf); | |
197 | return -EFAULT; | |
198 | } | |
199 | ||
200 | buf[count] = '\0'; | |
201 | ||
202 | /* | |
203 | * Skip over leading whitespace | |
204 | */ | |
205 | while (count && isspace(*s)) { | |
206 | --count; | |
207 | ++s; | |
208 | } | |
209 | /* | |
210 | * Do one full pass to verify all parameters, | |
211 | * then do another to actually write the new settings. | |
212 | */ | |
213 | do { | |
214 | char *p = s; | |
215 | n = count; | |
216 | while (n > 0) { | |
217 | unsigned val; | |
218 | char *q = p; | |
219 | ||
220 | while (n > 0 && *p != ':') { | |
221 | --n; | |
222 | p++; | |
223 | } | |
224 | if (*p != ':') | |
225 | goto parse_error; | |
226 | if (p - q > MAX_LEN) | |
227 | goto parse_error; | |
228 | memcpy(name, q, p - q); | |
229 | name[p - q] = 0; | |
230 | ||
231 | if (n > 0) { | |
232 | --n; | |
233 | p++; | |
234 | } else | |
235 | goto parse_error; | |
236 | ||
237 | val = simple_strtoul(p, &q, 10); | |
238 | n -= q - p; | |
239 | p = q; | |
240 | if (n > 0 && !isspace(*p)) | |
241 | goto parse_error; | |
242 | while (n > 0 && isspace(*p)) { | |
243 | --n; | |
244 | ++p; | |
245 | } | |
246 | ||
247 | down(&ide_setting_sem); | |
248 | setting = ide_find_setting_by_name(drive, name); | |
249 | if (!setting) | |
250 | { | |
251 | up(&ide_setting_sem); | |
252 | goto parse_error; | |
253 | } | |
254 | if (for_real) | |
255 | ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor); | |
256 | up(&ide_setting_sem); | |
257 | } | |
258 | } while (!for_real++); | |
259 | free_page((unsigned long)buf); | |
260 | return count; | |
261 | parse_error: | |
262 | free_page((unsigned long)buf); | |
263 | printk("proc_ide_write_settings(): parse error\n"); | |
264 | return -EINVAL; | |
265 | } | |
266 | ||
267 | int proc_ide_read_capacity | |
268 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
269 | { | |
270 | int len = sprintf(page,"%llu\n", (long long)0x7fffffff); | |
271 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
272 | } | |
273 | ||
274 | EXPORT_SYMBOL_GPL(proc_ide_read_capacity); | |
275 | ||
276 | int proc_ide_read_geometry | |
277 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
278 | { | |
279 | ide_drive_t *drive = (ide_drive_t *) data; | |
280 | char *out = page; | |
281 | int len; | |
282 | ||
283 | out += sprintf(out,"physical %d/%d/%d\n", | |
284 | drive->cyl, drive->head, drive->sect); | |
285 | out += sprintf(out,"logical %d/%d/%d\n", | |
286 | drive->bios_cyl, drive->bios_head, drive->bios_sect); | |
287 | ||
288 | len = out - page; | |
289 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
290 | } | |
291 | ||
292 | EXPORT_SYMBOL(proc_ide_read_geometry); | |
293 | ||
294 | static int proc_ide_read_dmodel | |
295 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
296 | { | |
297 | ide_drive_t *drive = (ide_drive_t *) data; | |
298 | struct hd_driveid *id = drive->id; | |
299 | int len; | |
300 | ||
301 | len = sprintf(page, "%.40s\n", | |
302 | (id && id->model[0]) ? (char *)id->model : "(none)"); | |
303 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
304 | } | |
305 | ||
306 | static int proc_ide_read_driver | |
307 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
308 | { | |
309 | ide_drive_t *drive = (ide_drive_t *) data; | |
310 | ide_driver_t *driver = drive->driver; | |
311 | int len; | |
312 | ||
313 | if (driver) { | |
314 | len = sprintf(page, "%s version %s\n", | |
315 | driver->name, driver->version); | |
316 | } else | |
317 | len = sprintf(page, "ide-default version 0.9.newide\n"); | |
318 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
319 | } | |
320 | ||
321 | static int proc_ide_write_driver | |
322 | (struct file *file, const char __user *buffer, unsigned long count, void *data) | |
323 | { | |
324 | ide_drive_t *drive = (ide_drive_t *) data; | |
325 | char name[32]; | |
326 | ||
327 | if (!capable(CAP_SYS_ADMIN)) | |
328 | return -EACCES; | |
329 | if (count > 31) | |
330 | count = 31; | |
331 | if (copy_from_user(name, buffer, count)) | |
332 | return -EFAULT; | |
333 | name[count] = '\0'; | |
334 | if (ide_replace_subdriver(drive, name)) | |
335 | return -EINVAL; | |
336 | return count; | |
337 | } | |
338 | ||
339 | static int proc_ide_read_media | |
340 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
341 | { | |
342 | ide_drive_t *drive = (ide_drive_t *) data; | |
343 | const char *media; | |
344 | int len; | |
345 | ||
346 | switch (drive->media) { | |
347 | case ide_disk: media = "disk\n"; | |
348 | break; | |
349 | case ide_cdrom: media = "cdrom\n"; | |
350 | break; | |
351 | case ide_tape: media = "tape\n"; | |
352 | break; | |
353 | case ide_floppy:media = "floppy\n"; | |
354 | break; | |
355 | default: media = "UNKNOWN\n"; | |
356 | break; | |
357 | } | |
358 | strcpy(page,media); | |
359 | len = strlen(media); | |
360 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
361 | } | |
362 | ||
363 | static ide_proc_entry_t generic_drive_entries[] = { | |
364 | { "driver", S_IFREG|S_IRUGO, proc_ide_read_driver, proc_ide_write_driver }, | |
365 | { "identify", S_IFREG|S_IRUSR, proc_ide_read_identify, NULL }, | |
366 | { "media", S_IFREG|S_IRUGO, proc_ide_read_media, NULL }, | |
367 | { "model", S_IFREG|S_IRUGO, proc_ide_read_dmodel, NULL }, | |
368 | { "settings", S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings }, | |
369 | { NULL, 0, NULL, NULL } | |
370 | }; | |
371 | ||
372 | void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data) | |
373 | { | |
374 | struct proc_dir_entry *ent; | |
375 | ||
376 | if (!dir || !p) | |
377 | return; | |
378 | while (p->name != NULL) { | |
379 | ent = create_proc_entry(p->name, p->mode, dir); | |
380 | if (!ent) return; | |
381 | ent->nlink = 1; | |
382 | ent->data = data; | |
383 | ent->read_proc = p->read_proc; | |
384 | ent->write_proc = p->write_proc; | |
385 | p++; | |
386 | } | |
387 | } | |
388 | ||
389 | void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) | |
390 | { | |
391 | if (!dir || !p) | |
392 | return; | |
393 | while (p->name != NULL) { | |
394 | remove_proc_entry(p->name, dir); | |
395 | p++; | |
396 | } | |
397 | } | |
398 | ||
399 | static void create_proc_ide_drives(ide_hwif_t *hwif) | |
400 | { | |
401 | int d; | |
402 | struct proc_dir_entry *ent; | |
403 | struct proc_dir_entry *parent = hwif->proc; | |
404 | char name[64]; | |
405 | ||
406 | for (d = 0; d < MAX_DRIVES; d++) { | |
407 | ide_drive_t *drive = &hwif->drives[d]; | |
408 | ||
409 | if (!drive->present) | |
410 | continue; | |
411 | if (drive->proc) | |
412 | continue; | |
413 | ||
414 | drive->proc = proc_mkdir(drive->name, parent); | |
415 | if (drive->proc) | |
416 | ide_add_proc_entries(drive->proc, generic_drive_entries, drive); | |
417 | sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name); | |
418 | ent = proc_symlink(drive->name, proc_ide_root, name); | |
419 | if (!ent) return; | |
420 | } | |
421 | } | |
422 | ||
423 | static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive) | |
424 | { | |
425 | if (drive->proc) { | |
426 | ide_remove_proc_entries(drive->proc, generic_drive_entries); | |
427 | remove_proc_entry(drive->name, proc_ide_root); | |
428 | remove_proc_entry(drive->name, hwif->proc); | |
429 | drive->proc = NULL; | |
430 | } | |
431 | } | |
432 | ||
433 | static void destroy_proc_ide_drives(ide_hwif_t *hwif) | |
434 | { | |
435 | int d; | |
436 | ||
437 | for (d = 0; d < MAX_DRIVES; d++) { | |
438 | ide_drive_t *drive = &hwif->drives[d]; | |
439 | if (drive->proc) | |
440 | destroy_proc_ide_device(hwif, drive); | |
441 | } | |
442 | } | |
443 | ||
444 | static ide_proc_entry_t hwif_entries[] = { | |
445 | { "channel", S_IFREG|S_IRUGO, proc_ide_read_channel, NULL }, | |
446 | { "mate", S_IFREG|S_IRUGO, proc_ide_read_mate, NULL }, | |
447 | { "model", S_IFREG|S_IRUGO, proc_ide_read_imodel, NULL }, | |
448 | { NULL, 0, NULL, NULL } | |
449 | }; | |
450 | ||
451 | void create_proc_ide_interfaces(void) | |
452 | { | |
453 | int h; | |
454 | ||
455 | for (h = 0; h < MAX_HWIFS; h++) { | |
456 | ide_hwif_t *hwif = &ide_hwifs[h]; | |
457 | ||
458 | if (!hwif->present) | |
459 | continue; | |
460 | if (!hwif->proc) { | |
461 | hwif->proc = proc_mkdir(hwif->name, proc_ide_root); | |
462 | if (!hwif->proc) | |
463 | return; | |
464 | ide_add_proc_entries(hwif->proc, hwif_entries, hwif); | |
465 | } | |
466 | create_proc_ide_drives(hwif); | |
467 | } | |
468 | } | |
469 | ||
470 | EXPORT_SYMBOL(create_proc_ide_interfaces); | |
471 | ||
472 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
473 | void ide_pci_create_host_proc(const char *name, get_info_t *get_info) | |
474 | { | |
475 | create_proc_info_entry(name, 0, proc_ide_root, get_info); | |
476 | } | |
477 | ||
478 | EXPORT_SYMBOL_GPL(ide_pci_create_host_proc); | |
479 | #endif | |
480 | ||
481 | void destroy_proc_ide_interface(ide_hwif_t *hwif) | |
482 | { | |
483 | if (hwif->proc) { | |
484 | destroy_proc_ide_drives(hwif); | |
485 | ide_remove_proc_entries(hwif->proc, hwif_entries); | |
486 | remove_proc_entry(hwif->name, proc_ide_root); | |
487 | hwif->proc = NULL; | |
488 | } | |
489 | } | |
490 | ||
491 | extern struct seq_operations ide_drivers_op; | |
492 | static int ide_drivers_open(struct inode *inode, struct file *file) | |
493 | { | |
494 | return seq_open(file, &ide_drivers_op); | |
495 | } | |
496 | static struct file_operations ide_drivers_operations = { | |
497 | .open = ide_drivers_open, | |
498 | .read = seq_read, | |
499 | .llseek = seq_lseek, | |
500 | .release = seq_release, | |
501 | }; | |
502 | ||
503 | void proc_ide_create(void) | |
504 | { | |
505 | struct proc_dir_entry *entry; | |
506 | ||
507 | if (!proc_ide_root) | |
508 | return; | |
509 | ||
510 | create_proc_ide_interfaces(); | |
511 | ||
512 | entry = create_proc_entry("drivers", 0, proc_ide_root); | |
513 | if (entry) | |
514 | entry->proc_fops = &ide_drivers_operations; | |
515 | } | |
516 | ||
517 | void proc_ide_destroy(void) | |
518 | { | |
519 | remove_proc_entry("ide/drivers", proc_ide_root); | |
520 | remove_proc_entry("ide", NULL); | |
521 | } |