Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
3 | * Horst Hummel <Horst.Hummel@de.ibm.com> | |
4 | * Carsten Otte <Cotte@de.ibm.com> | |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
6 | * Bugreports.to..: <Linux390@de.ibm.com> | |
a53c8fab | 7 | * Copyright IBM Corp. 1999,2001 |
1da177e4 LT |
8 | * |
9 | * Device mapping and dasd= parameter parsing functions. All devmap | |
10 | * functions may not be called from interrupt context. In particular | |
11 | * dasd_get_device is a no-no from interrupt context. | |
12 | * | |
1da177e4 LT |
13 | */ |
14 | ||
fc19f381 SH |
15 | #define KMSG_COMPONENT "dasd" |
16 | ||
1da177e4 LT |
17 | #include <linux/ctype.h> |
18 | #include <linux/init.h> | |
8d3b33f6 | 19 | #include <linux/module.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
1da177e4 LT |
21 | |
22 | #include <asm/debug.h> | |
23 | #include <asm/uaccess.h> | |
7039d3a1 | 24 | #include <asm/ipl.h> |
1da177e4 LT |
25 | |
26 | /* This is ugly... */ | |
27 | #define PRINTK_HEADER "dasd_devmap:" | |
98df67b3 | 28 | #define DASD_BUS_ID_SIZE 20 |
1da177e4 LT |
29 | |
30 | #include "dasd_int.h" | |
31 | ||
e18b890b | 32 | struct kmem_cache *dasd_page_cache; |
40545573 | 33 | EXPORT_SYMBOL_GPL(dasd_page_cache); |
1da177e4 LT |
34 | |
35 | /* | |
36 | * dasd_devmap_t is used to store the features and the relation | |
37 | * between device number and device index. To find a dasd_devmap_t | |
38 | * that corresponds to a device number of a device index each | |
39 | * dasd_devmap_t is added to two linked lists, one to search by | |
40 | * the device number and one to search by the device index. As | |
41 | * soon as big minor numbers are available the device index list | |
42 | * can be removed since the device number will then be identical | |
43 | * to the device index. | |
44 | */ | |
45 | struct dasd_devmap { | |
46 | struct list_head list; | |
98df67b3 | 47 | char bus_id[DASD_BUS_ID_SIZE]; |
1da177e4 LT |
48 | unsigned int devindex; |
49 | unsigned short features; | |
50 | struct dasd_device *device; | |
51 | }; | |
52 | ||
53 | /* | |
54 | * Parameter parsing functions for dasd= parameter. The syntax is: | |
55 | * <devno> : (0x)?[0-9a-fA-F]+ | |
56 | * <busid> : [0-0a-f]\.[0-9a-f]\.(0x)?[0-9a-fA-F]+ | |
57 | * <feature> : ro | |
58 | * <feature_list> : \(<feature>(:<feature>)*\) | |
59 | * <devno-range> : <devno>(-<devno>)?<feature_list>? | |
60 | * <busid-range> : <busid>(-<busid>)?<feature_list>? | |
61 | * <devices> : <devno-range>|<busid-range> | |
62 | * <dasd_module> : dasd_diag_mod|dasd_eckd_mod|dasd_fba_mod | |
63 | * | |
64 | * <dasd> : autodetect|probeonly|<devices>(,<devices>)* | |
65 | */ | |
66 | ||
67 | int dasd_probeonly = 0; /* is true, when probeonly mode is active */ | |
68 | int dasd_autodetect = 0; /* is true, when autodetection is active */ | |
40545573 HH |
69 | int dasd_nopav = 0; /* is true, when PAV is disabled */ |
70 | EXPORT_SYMBOL_GPL(dasd_nopav); | |
f3eb5384 SW |
71 | int dasd_nofcx; /* disable High Performance Ficon */ |
72 | EXPORT_SYMBOL_GPL(dasd_nofcx); | |
1da177e4 LT |
73 | |
74 | /* | |
75 | * char *dasd[] is intended to hold the ranges supplied by the dasd= statement | |
76 | * it is named 'dasd' to directly be filled by insmod with the comma separated | |
77 | * strings when running as a module. | |
78 | */ | |
79 | static char *dasd[256]; | |
3b126935 | 80 | module_param_array(dasd, charp, NULL, S_IRUGO); |
8d3b33f6 | 81 | |
1da177e4 | 82 | /* |
d0710c7c | 83 | * Single spinlock to protect devmap and servermap structures and lists. |
1da177e4 LT |
84 | */ |
85 | static DEFINE_SPINLOCK(dasd_devmap_lock); | |
86 | ||
87 | /* | |
88 | * Hash lists for devmap structures. | |
89 | */ | |
90 | static struct list_head dasd_hashlists[256]; | |
91 | int dasd_max_devindex; | |
92 | ||
69f90f6a | 93 | static struct dasd_devmap *dasd_add_busid(const char *, int); |
1da177e4 LT |
94 | |
95 | static inline int | |
69f90f6a | 96 | dasd_hash_busid(const char *bus_id) |
1da177e4 LT |
97 | { |
98 | int hash, i; | |
99 | ||
100 | hash = 0; | |
98df67b3 | 101 | for (i = 0; (i < DASD_BUS_ID_SIZE) && *bus_id; i++, bus_id++) |
1da177e4 LT |
102 | hash += *bus_id; |
103 | return hash & 0xff; | |
104 | } | |
105 | ||
106 | #ifndef MODULE | |
107 | /* | |
108 | * The parameter parsing functions for builtin-drivers are called | |
109 | * before kmalloc works. Store the pointers to the parameters strings | |
110 | * into dasd[] for later processing. | |
111 | */ | |
112 | static int __init | |
113 | dasd_call_setup(char *str) | |
114 | { | |
115 | static int count = 0; | |
116 | ||
117 | if (count < 256) | |
118 | dasd[count++] = str; | |
119 | return 1; | |
120 | } | |
121 | ||
122 | __setup ("dasd=", dasd_call_setup); | |
123 | #endif /* #ifndef MODULE */ | |
124 | ||
7039d3a1 PO |
125 | #define DASD_IPLDEV "ipldev" |
126 | ||
1da177e4 LT |
127 | /* |
128 | * Read a device busid/devno from a string. | |
129 | */ | |
4d284cac | 130 | static int |
fc19f381 | 131 | |
1da177e4 LT |
132 | dasd_busid(char **str, int *id0, int *id1, int *devno) |
133 | { | |
134 | int val, old_style; | |
138c014d | 135 | |
7039d3a1 PO |
136 | /* Interpret ipldev busid */ |
137 | if (strncmp(DASD_IPLDEV, *str, strlen(DASD_IPLDEV)) == 0) { | |
138 | if (ipl_info.type != IPL_TYPE_CCW) { | |
fc19f381 | 139 | pr_err("The IPL device is not a CCW device\n"); |
7039d3a1 PO |
140 | return -EINVAL; |
141 | } | |
142 | *id0 = 0; | |
143 | *id1 = ipl_info.data.ccw.dev_id.ssid; | |
144 | *devno = ipl_info.data.ccw.dev_id.devno; | |
145 | *str += strlen(DASD_IPLDEV); | |
146 | ||
147 | return 0; | |
148 | } | |
1da177e4 LT |
149 | /* check for leading '0x' */ |
150 | old_style = 0; | |
151 | if ((*str)[0] == '0' && (*str)[1] == 'x') { | |
152 | *str += 2; | |
153 | old_style = 1; | |
154 | } | |
155 | if (!isxdigit((*str)[0])) /* We require at least one hex digit */ | |
156 | return -EINVAL; | |
157 | val = simple_strtoul(*str, str, 16); | |
158 | if (old_style || (*str)[0] != '.') { | |
159 | *id0 = *id1 = 0; | |
160 | if (val < 0 || val > 0xffff) | |
161 | return -EINVAL; | |
162 | *devno = val; | |
163 | return 0; | |
164 | } | |
165 | /* New style x.y.z busid */ | |
166 | if (val < 0 || val > 0xff) | |
167 | return -EINVAL; | |
168 | *id0 = val; | |
169 | (*str)++; | |
170 | if (!isxdigit((*str)[0])) /* We require at least one hex digit */ | |
171 | return -EINVAL; | |
172 | val = simple_strtoul(*str, str, 16); | |
173 | if (val < 0 || val > 0xff || (*str)++[0] != '.') | |
174 | return -EINVAL; | |
175 | *id1 = val; | |
176 | if (!isxdigit((*str)[0])) /* We require at least one hex digit */ | |
177 | return -EINVAL; | |
178 | val = simple_strtoul(*str, str, 16); | |
179 | if (val < 0 || val > 0xffff) | |
180 | return -EINVAL; | |
181 | *devno = val; | |
182 | return 0; | |
183 | } | |
184 | ||
185 | /* | |
186 | * Read colon separated list of dasd features. Currently there is | |
187 | * only one: "ro" for read-only devices. The default feature set | |
188 | * is empty (value 0). | |
189 | */ | |
4d284cac | 190 | static int |
1da177e4 LT |
191 | dasd_feature_list(char *str, char **endp) |
192 | { | |
193 | int features, len, rc; | |
194 | ||
195 | rc = 0; | |
196 | if (*str != '(') { | |
197 | *endp = str; | |
198 | return DASD_FEATURE_DEFAULT; | |
199 | } | |
200 | str++; | |
201 | features = 0; | |
202 | ||
203 | while (1) { | |
138c014d | 204 | for (len = 0; |
1da177e4 LT |
205 | str[len] && str[len] != ':' && str[len] != ')'; len++); |
206 | if (len == 2 && !strncmp(str, "ro", 2)) | |
207 | features |= DASD_FEATURE_READONLY; | |
208 | else if (len == 4 && !strncmp(str, "diag", 4)) | |
209 | features |= DASD_FEATURE_USEDIAG; | |
e4dbb0f2 SH |
210 | else if (len == 3 && !strncmp(str, "raw", 3)) |
211 | features |= DASD_FEATURE_USERAW; | |
9575bf26 HH |
212 | else if (len == 6 && !strncmp(str, "erplog", 6)) |
213 | features |= DASD_FEATURE_ERPLOG; | |
13de227b HS |
214 | else if (len == 8 && !strncmp(str, "failfast", 8)) |
215 | features |= DASD_FEATURE_FAILFAST; | |
1da177e4 | 216 | else { |
fc19f381 SH |
217 | pr_warning("%*s is not a supported device option\n", |
218 | len, str); | |
1da177e4 LT |
219 | rc = -EINVAL; |
220 | } | |
221 | str += len; | |
222 | if (*str != ':') | |
223 | break; | |
224 | str++; | |
225 | } | |
226 | if (*str != ')') { | |
fc19f381 SH |
227 | pr_warning("A closing parenthesis ')' is missing in the " |
228 | "dasd= parameter\n"); | |
1da177e4 LT |
229 | rc = -EINVAL; |
230 | } else | |
231 | str++; | |
232 | *endp = str; | |
233 | if (rc != 0) | |
234 | return rc; | |
235 | return features; | |
236 | } | |
237 | ||
238 | /* | |
239 | * Try to match the first element on the comma separated parse string | |
240 | * with one of the known keywords. If a keyword is found, take the approprate | |
241 | * action and return a pointer to the residual string. If the first element | |
242 | * could not be matched to any keyword then return an error code. | |
243 | */ | |
244 | static char * | |
245 | dasd_parse_keyword( char *parsestring ) { | |
246 | ||
247 | char *nextcomma, *residual_str; | |
248 | int length; | |
249 | ||
250 | nextcomma = strchr(parsestring,','); | |
251 | if (nextcomma) { | |
252 | length = nextcomma - parsestring; | |
253 | residual_str = nextcomma + 1; | |
254 | } else { | |
255 | length = strlen(parsestring); | |
256 | residual_str = parsestring + length; | |
257 | } | |
40545573 | 258 | if (strncmp("autodetect", parsestring, length) == 0) { |
1da177e4 | 259 | dasd_autodetect = 1; |
fc19f381 | 260 | pr_info("The autodetection mode has been activated\n"); |
1da177e4 LT |
261 | return residual_str; |
262 | } | |
40545573 | 263 | if (strncmp("probeonly", parsestring, length) == 0) { |
1da177e4 | 264 | dasd_probeonly = 1; |
fc19f381 | 265 | pr_info("The probeonly mode has been activated\n"); |
1da177e4 LT |
266 | return residual_str; |
267 | } | |
40545573 | 268 | if (strncmp("nopav", parsestring, length) == 0) { |
dcd707b4 | 269 | if (MACHINE_IS_VM) |
fc19f381 | 270 | pr_info("'nopav' is not supported on z/VM\n"); |
dcd707b4 PO |
271 | else { |
272 | dasd_nopav = 1; | |
fc19f381 | 273 | pr_info("PAV support has be deactivated\n"); |
dcd707b4 | 274 | } |
40545573 HH |
275 | return residual_str; |
276 | } | |
f3eb5384 SW |
277 | if (strncmp("nofcx", parsestring, length) == 0) { |
278 | dasd_nofcx = 1; | |
fc19f381 SH |
279 | pr_info("High Performance FICON support has been " |
280 | "deactivated\n"); | |
f3eb5384 SW |
281 | return residual_str; |
282 | } | |
40545573 | 283 | if (strncmp("fixedbuffers", parsestring, length) == 0) { |
1da177e4 LT |
284 | if (dasd_page_cache) |
285 | return residual_str; | |
286 | dasd_page_cache = | |
2f6c55fc HC |
287 | kmem_cache_create("dasd_page_cache", PAGE_SIZE, |
288 | PAGE_SIZE, SLAB_CACHE_DMA, | |
20c2df83 | 289 | NULL); |
1da177e4 | 290 | if (!dasd_page_cache) |
fc19f381 | 291 | DBF_EVENT(DBF_WARNING, "%s", "Failed to create slab, " |
1da177e4 LT |
292 | "fixed buffer mode disabled."); |
293 | else | |
fc19f381 | 294 | DBF_EVENT(DBF_INFO, "%s", |
1da177e4 LT |
295 | "turning on fixed buffer mode"); |
296 | return residual_str; | |
297 | } | |
298 | return ERR_PTR(-EINVAL); | |
299 | } | |
300 | ||
301 | /* | |
302 | * Try to interprete the first element on the comma separated parse string | |
303 | * as a device number or a range of devices. If the interpretation is | |
25985edc | 304 | * successful, create the matching dasd_devmap entries and return a pointer |
1da177e4 LT |
305 | * to the residual string. |
306 | * If interpretation fails or in case of an error, return an error code. | |
307 | */ | |
308 | static char * | |
309 | dasd_parse_range( char *parsestring ) { | |
310 | ||
311 | struct dasd_devmap *devmap; | |
312 | int from, from_id0, from_id1; | |
313 | int to, to_id0, to_id1; | |
314 | int features, rc; | |
98df67b3 | 315 | char bus_id[DASD_BUS_ID_SIZE+1], *str; |
1da177e4 LT |
316 | |
317 | str = parsestring; | |
318 | rc = dasd_busid(&str, &from_id0, &from_id1, &from); | |
319 | if (rc == 0) { | |
320 | to = from; | |
321 | to_id0 = from_id0; | |
322 | to_id1 = from_id1; | |
323 | if (*str == '-') { | |
324 | str++; | |
325 | rc = dasd_busid(&str, &to_id0, &to_id1, &to); | |
326 | } | |
327 | } | |
328 | if (rc == 0 && | |
329 | (from_id0 != to_id0 || from_id1 != to_id1 || from > to)) | |
330 | rc = -EINVAL; | |
331 | if (rc) { | |
fc19f381 | 332 | pr_err("%s is not a valid device range\n", parsestring); |
1da177e4 LT |
333 | return ERR_PTR(rc); |
334 | } | |
335 | features = dasd_feature_list(str, &str); | |
336 | if (features < 0) | |
337 | return ERR_PTR(-EINVAL); | |
40545573 HH |
338 | /* each device in dasd= parameter should be set initially online */ |
339 | features |= DASD_FEATURE_INITIAL_ONLINE; | |
1da177e4 LT |
340 | while (from <= to) { |
341 | sprintf(bus_id, "%01x.%01x.%04x", | |
342 | from_id0, from_id1, from++); | |
343 | devmap = dasd_add_busid(bus_id, features); | |
344 | if (IS_ERR(devmap)) | |
345 | return (char *)devmap; | |
346 | } | |
347 | if (*str == ',') | |
348 | return str + 1; | |
349 | if (*str == '\0') | |
350 | return str; | |
fc19f381 SH |
351 | pr_warning("The dasd= parameter value %s has an invalid ending\n", |
352 | str); | |
1da177e4 LT |
353 | return ERR_PTR(-EINVAL); |
354 | } | |
355 | ||
4d284cac | 356 | static char * |
1da177e4 LT |
357 | dasd_parse_next_element( char *parsestring ) { |
358 | char * residual_str; | |
359 | residual_str = dasd_parse_keyword(parsestring); | |
360 | if (!IS_ERR(residual_str)) | |
361 | return residual_str; | |
362 | residual_str = dasd_parse_range(parsestring); | |
363 | return residual_str; | |
364 | } | |
365 | ||
366 | /* | |
367 | * Parse parameters stored in dasd[] | |
368 | * The 'dasd=...' parameter allows to specify a comma separated list of | |
369 | * keywords and device ranges. When the dasd driver is build into the kernel, | |
370 | * the complete list will be stored as one element of the dasd[] array. | |
371 | * When the dasd driver is build as a module, then the list is broken into | |
372 | * it's elements and each dasd[] entry contains one element. | |
373 | */ | |
374 | int | |
375 | dasd_parse(void) | |
376 | { | |
377 | int rc, i; | |
378 | char *parsestring; | |
379 | ||
380 | rc = 0; | |
381 | for (i = 0; i < 256; i++) { | |
382 | if (dasd[i] == NULL) | |
383 | break; | |
384 | parsestring = dasd[i]; | |
385 | /* loop over the comma separated list in the parsestring */ | |
386 | while (*parsestring) { | |
387 | parsestring = dasd_parse_next_element(parsestring); | |
388 | if(IS_ERR(parsestring)) { | |
389 | rc = PTR_ERR(parsestring); | |
390 | break; | |
391 | } | |
392 | } | |
393 | if (rc) { | |
394 | DBF_EVENT(DBF_ALERT, "%s", "invalid range found"); | |
395 | break; | |
396 | } | |
397 | } | |
398 | return rc; | |
399 | } | |
400 | ||
401 | /* | |
402 | * Add a devmap for the device specified by busid. It is possible that | |
403 | * the devmap already exists (dasd= parameter). The order of the devices | |
404 | * added through this function will define the kdevs for the individual | |
138c014d | 405 | * devices. |
1da177e4 LT |
406 | */ |
407 | static struct dasd_devmap * | |
69f90f6a | 408 | dasd_add_busid(const char *bus_id, int features) |
1da177e4 LT |
409 | { |
410 | struct dasd_devmap *devmap, *new, *tmp; | |
411 | int hash; | |
412 | ||
006485dc | 413 | new = kzalloc(sizeof(struct dasd_devmap), GFP_KERNEL); |
1da177e4 LT |
414 | if (!new) |
415 | return ERR_PTR(-ENOMEM); | |
416 | spin_lock(&dasd_devmap_lock); | |
d2c993d8 | 417 | devmap = NULL; |
1da177e4 LT |
418 | hash = dasd_hash_busid(bus_id); |
419 | list_for_each_entry(tmp, &dasd_hashlists[hash], list) | |
98df67b3 | 420 | if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) { |
1da177e4 LT |
421 | devmap = tmp; |
422 | break; | |
423 | } | |
424 | if (!devmap) { | |
425 | /* This bus_id is new. */ | |
426 | new->devindex = dasd_max_devindex++; | |
98df67b3 | 427 | strncpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE); |
1da177e4 | 428 | new->features = features; |
d2c993d8 | 429 | new->device = NULL; |
1da177e4 LT |
430 | list_add(&new->list, &dasd_hashlists[hash]); |
431 | devmap = new; | |
d2c993d8 | 432 | new = NULL; |
1da177e4 LT |
433 | } |
434 | spin_unlock(&dasd_devmap_lock); | |
17fd682e | 435 | kfree(new); |
1da177e4 LT |
436 | return devmap; |
437 | } | |
438 | ||
439 | /* | |
440 | * Find devmap for device with given bus_id. | |
441 | */ | |
442 | static struct dasd_devmap * | |
69f90f6a | 443 | dasd_find_busid(const char *bus_id) |
1da177e4 LT |
444 | { |
445 | struct dasd_devmap *devmap, *tmp; | |
446 | int hash; | |
447 | ||
448 | spin_lock(&dasd_devmap_lock); | |
449 | devmap = ERR_PTR(-ENODEV); | |
450 | hash = dasd_hash_busid(bus_id); | |
451 | list_for_each_entry(tmp, &dasd_hashlists[hash], list) { | |
98df67b3 | 452 | if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) { |
1da177e4 LT |
453 | devmap = tmp; |
454 | break; | |
455 | } | |
456 | } | |
457 | spin_unlock(&dasd_devmap_lock); | |
458 | return devmap; | |
459 | } | |
460 | ||
461 | /* | |
462 | * Check if busid has been added to the list of dasd ranges. | |
463 | */ | |
464 | int | |
69f90f6a | 465 | dasd_busid_known(const char *bus_id) |
1da177e4 LT |
466 | { |
467 | return IS_ERR(dasd_find_busid(bus_id)) ? -ENOENT : 0; | |
468 | } | |
469 | ||
470 | /* | |
471 | * Forget all about the device numbers added so far. | |
472 | * This may only be called at module unload or system shutdown. | |
473 | */ | |
474 | static void | |
475 | dasd_forget_ranges(void) | |
476 | { | |
477 | struct dasd_devmap *devmap, *n; | |
478 | int i; | |
479 | ||
480 | spin_lock(&dasd_devmap_lock); | |
481 | for (i = 0; i < 256; i++) { | |
482 | list_for_each_entry_safe(devmap, n, &dasd_hashlists[i], list) { | |
606f4422 | 483 | BUG_ON(devmap->device != NULL); |
1da177e4 LT |
484 | list_del(&devmap->list); |
485 | kfree(devmap); | |
486 | } | |
487 | } | |
488 | spin_unlock(&dasd_devmap_lock); | |
489 | } | |
490 | ||
491 | /* | |
492 | * Find the device struct by its device index. | |
493 | */ | |
494 | struct dasd_device * | |
495 | dasd_device_from_devindex(int devindex) | |
496 | { | |
497 | struct dasd_devmap *devmap, *tmp; | |
498 | struct dasd_device *device; | |
499 | int i; | |
500 | ||
501 | spin_lock(&dasd_devmap_lock); | |
d2c993d8 | 502 | devmap = NULL; |
1da177e4 LT |
503 | for (i = 0; (i < 256) && !devmap; i++) |
504 | list_for_each_entry(tmp, &dasd_hashlists[i], list) | |
505 | if (tmp->devindex == devindex) { | |
506 | /* Found the devmap for the device. */ | |
507 | devmap = tmp; | |
508 | break; | |
509 | } | |
510 | if (devmap && devmap->device) { | |
511 | device = devmap->device; | |
512 | dasd_get_device(device); | |
513 | } else | |
514 | device = ERR_PTR(-ENODEV); | |
515 | spin_unlock(&dasd_devmap_lock); | |
516 | return device; | |
517 | } | |
518 | ||
519 | /* | |
520 | * Return devmap for cdev. If no devmap exists yet, create one and | |
521 | * connect it to the cdev. | |
522 | */ | |
523 | static struct dasd_devmap * | |
524 | dasd_devmap_from_cdev(struct ccw_device *cdev) | |
525 | { | |
526 | struct dasd_devmap *devmap; | |
527 | ||
2a0217d5 | 528 | devmap = dasd_find_busid(dev_name(&cdev->dev)); |
1da177e4 | 529 | if (IS_ERR(devmap)) |
2a0217d5 | 530 | devmap = dasd_add_busid(dev_name(&cdev->dev), |
1da177e4 LT |
531 | DASD_FEATURE_DEFAULT); |
532 | return devmap; | |
533 | } | |
534 | ||
535 | /* | |
536 | * Create a dasd device structure for cdev. | |
537 | */ | |
538 | struct dasd_device * | |
539 | dasd_create_device(struct ccw_device *cdev) | |
540 | { | |
541 | struct dasd_devmap *devmap; | |
542 | struct dasd_device *device; | |
a00bfd71 | 543 | unsigned long flags; |
1da177e4 LT |
544 | int rc; |
545 | ||
546 | devmap = dasd_devmap_from_cdev(cdev); | |
547 | if (IS_ERR(devmap)) | |
548 | return (void *) devmap; | |
1da177e4 LT |
549 | |
550 | device = dasd_alloc_device(); | |
551 | if (IS_ERR(device)) | |
552 | return device; | |
a00bfd71 | 553 | atomic_set(&device->ref_count, 3); |
1da177e4 LT |
554 | |
555 | spin_lock(&dasd_devmap_lock); | |
556 | if (!devmap->device) { | |
557 | devmap->device = device; | |
558 | device->devindex = devmap->devindex; | |
c6eb7b77 | 559 | device->features = devmap->features; |
1da177e4 LT |
560 | get_device(&cdev->dev); |
561 | device->cdev = cdev; | |
562 | rc = 0; | |
563 | } else | |
564 | /* Someone else was faster. */ | |
565 | rc = -EBUSY; | |
566 | spin_unlock(&dasd_devmap_lock); | |
567 | ||
568 | if (rc) { | |
569 | dasd_free_device(device); | |
570 | return ERR_PTR(rc); | |
571 | } | |
a00bfd71 MS |
572 | |
573 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
faf16aa9 | 574 | dev_set_drvdata(&cdev->dev, device); |
a00bfd71 MS |
575 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
576 | ||
1da177e4 LT |
577 | return device; |
578 | } | |
579 | ||
580 | /* | |
581 | * Wait queue for dasd_delete_device waits. | |
582 | */ | |
583 | static DECLARE_WAIT_QUEUE_HEAD(dasd_delete_wq); | |
584 | ||
585 | /* | |
586 | * Remove a dasd device structure. The passed referenced | |
587 | * is destroyed. | |
588 | */ | |
589 | void | |
590 | dasd_delete_device(struct dasd_device *device) | |
591 | { | |
592 | struct ccw_device *cdev; | |
593 | struct dasd_devmap *devmap; | |
a00bfd71 | 594 | unsigned long flags; |
1da177e4 LT |
595 | |
596 | /* First remove device pointer from devmap. */ | |
2a0217d5 | 597 | devmap = dasd_find_busid(dev_name(&device->cdev->dev)); |
606f4422 | 598 | BUG_ON(IS_ERR(devmap)); |
1da177e4 LT |
599 | spin_lock(&dasd_devmap_lock); |
600 | if (devmap->device != device) { | |
601 | spin_unlock(&dasd_devmap_lock); | |
602 | dasd_put_device(device); | |
603 | return; | |
604 | } | |
605 | devmap->device = NULL; | |
606 | spin_unlock(&dasd_devmap_lock); | |
607 | ||
a00bfd71 MS |
608 | /* Disconnect dasd_device structure from ccw_device structure. */ |
609 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
faf16aa9 | 610 | dev_set_drvdata(&device->cdev->dev, NULL); |
a00bfd71 MS |
611 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
612 | ||
613 | /* | |
614 | * Drop ref_count by 3, one for the devmap reference, one for | |
615 | * the cdev reference and one for the passed reference. | |
616 | */ | |
617 | atomic_sub(3, &device->ref_count); | |
1da177e4 LT |
618 | |
619 | /* Wait for reference counter to drop to zero. */ | |
620 | wait_event(dasd_delete_wq, atomic_read(&device->ref_count) == 0); | |
621 | ||
622 | /* Disconnect dasd_device structure from ccw_device structure. */ | |
623 | cdev = device->cdev; | |
624 | device->cdev = NULL; | |
625 | ||
1da177e4 LT |
626 | /* Put ccw_device structure. */ |
627 | put_device(&cdev->dev); | |
628 | ||
629 | /* Now the device structure can be freed. */ | |
630 | dasd_free_device(device); | |
631 | } | |
632 | ||
633 | /* | |
634 | * Reference counter dropped to zero. Wake up waiter | |
635 | * in dasd_delete_device. | |
636 | */ | |
637 | void | |
638 | dasd_put_device_wake(struct dasd_device *device) | |
639 | { | |
640 | wake_up(&dasd_delete_wq); | |
641 | } | |
a4d26c6a | 642 | EXPORT_SYMBOL_GPL(dasd_put_device_wake); |
1da177e4 | 643 | |
a00bfd71 MS |
644 | /* |
645 | * Return dasd_device structure associated with cdev. | |
646 | * This function needs to be called with the ccw device | |
647 | * lock held. It can be used from interrupt context. | |
648 | */ | |
649 | struct dasd_device * | |
650 | dasd_device_from_cdev_locked(struct ccw_device *cdev) | |
651 | { | |
faf16aa9 | 652 | struct dasd_device *device = dev_get_drvdata(&cdev->dev); |
a00bfd71 MS |
653 | |
654 | if (!device) | |
655 | return ERR_PTR(-ENODEV); | |
656 | dasd_get_device(device); | |
657 | return device; | |
658 | } | |
659 | ||
1da177e4 LT |
660 | /* |
661 | * Return dasd_device structure associated with cdev. | |
662 | */ | |
663 | struct dasd_device * | |
664 | dasd_device_from_cdev(struct ccw_device *cdev) | |
665 | { | |
1da177e4 | 666 | struct dasd_device *device; |
a00bfd71 | 667 | unsigned long flags; |
1da177e4 | 668 | |
a00bfd71 MS |
669 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
670 | device = dasd_device_from_cdev_locked(cdev); | |
671 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1da177e4 LT |
672 | return device; |
673 | } | |
674 | ||
65f8da47 SW |
675 | void dasd_add_link_to_gendisk(struct gendisk *gdp, struct dasd_device *device) |
676 | { | |
677 | struct dasd_devmap *devmap; | |
678 | ||
679 | devmap = dasd_find_busid(dev_name(&device->cdev->dev)); | |
680 | if (IS_ERR(devmap)) | |
681 | return; | |
682 | spin_lock(&dasd_devmap_lock); | |
683 | gdp->private_data = devmap; | |
684 | spin_unlock(&dasd_devmap_lock); | |
685 | } | |
686 | ||
687 | struct dasd_device *dasd_device_from_gendisk(struct gendisk *gdp) | |
688 | { | |
689 | struct dasd_device *device; | |
690 | struct dasd_devmap *devmap; | |
691 | ||
692 | if (!gdp->private_data) | |
693 | return NULL; | |
694 | device = NULL; | |
695 | spin_lock(&dasd_devmap_lock); | |
696 | devmap = gdp->private_data; | |
697 | if (devmap && devmap->device) { | |
698 | device = devmap->device; | |
699 | dasd_get_device(device); | |
700 | } | |
701 | spin_unlock(&dasd_devmap_lock); | |
702 | return device; | |
703 | } | |
704 | ||
1da177e4 LT |
705 | /* |
706 | * SECTION: files in sysfs | |
707 | */ | |
708 | ||
13de227b HS |
709 | /* |
710 | * failfast controls the behaviour, if no path is available | |
711 | */ | |
712 | static ssize_t dasd_ff_show(struct device *dev, struct device_attribute *attr, | |
713 | char *buf) | |
714 | { | |
715 | struct dasd_devmap *devmap; | |
716 | int ff_flag; | |
717 | ||
ca0b4b7d | 718 | devmap = dasd_find_busid(dev_name(dev)); |
13de227b HS |
719 | if (!IS_ERR(devmap)) |
720 | ff_flag = (devmap->features & DASD_FEATURE_FAILFAST) != 0; | |
721 | else | |
722 | ff_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_FAILFAST) != 0; | |
723 | return snprintf(buf, PAGE_SIZE, ff_flag ? "1\n" : "0\n"); | |
724 | } | |
725 | ||
726 | static ssize_t dasd_ff_store(struct device *dev, struct device_attribute *attr, | |
727 | const char *buf, size_t count) | |
728 | { | |
729 | struct dasd_devmap *devmap; | |
730 | int val; | |
731 | char *endp; | |
732 | ||
733 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
734 | if (IS_ERR(devmap)) | |
735 | return PTR_ERR(devmap); | |
736 | ||
737 | val = simple_strtoul(buf, &endp, 0); | |
738 | if (((endp + 1) < (buf + count)) || (val > 1)) | |
739 | return -EINVAL; | |
740 | ||
741 | spin_lock(&dasd_devmap_lock); | |
742 | if (val) | |
743 | devmap->features |= DASD_FEATURE_FAILFAST; | |
744 | else | |
745 | devmap->features &= ~DASD_FEATURE_FAILFAST; | |
746 | if (devmap->device) | |
747 | devmap->device->features = devmap->features; | |
748 | spin_unlock(&dasd_devmap_lock); | |
749 | return count; | |
750 | } | |
751 | ||
752 | static DEVICE_ATTR(failfast, 0644, dasd_ff_show, dasd_ff_store); | |
753 | ||
1da177e4 LT |
754 | /* |
755 | * readonly controls the readonly status of a dasd | |
756 | */ | |
757 | static ssize_t | |
e404e274 | 758 | dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
759 | { |
760 | struct dasd_devmap *devmap; | |
761 | int ro_flag; | |
762 | ||
2a0217d5 | 763 | devmap = dasd_find_busid(dev_name(dev)); |
1da177e4 LT |
764 | if (!IS_ERR(devmap)) |
765 | ro_flag = (devmap->features & DASD_FEATURE_READONLY) != 0; | |
766 | else | |
767 | ro_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_READONLY) != 0; | |
768 | return snprintf(buf, PAGE_SIZE, ro_flag ? "1\n" : "0\n"); | |
769 | } | |
770 | ||
771 | static ssize_t | |
138c014d HH |
772 | dasd_ro_store(struct device *dev, struct device_attribute *attr, |
773 | const char *buf, size_t count) | |
1da177e4 LT |
774 | { |
775 | struct dasd_devmap *devmap; | |
33b62a30 | 776 | struct dasd_device *device; |
01376f44 HH |
777 | int val; |
778 | char *endp; | |
1da177e4 LT |
779 | |
780 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
781 | if (IS_ERR(devmap)) | |
782 | return PTR_ERR(devmap); | |
01376f44 HH |
783 | |
784 | val = simple_strtoul(buf, &endp, 0); | |
785 | if (((endp + 1) < (buf + count)) || (val > 1)) | |
786 | return -EINVAL; | |
787 | ||
1da177e4 | 788 | spin_lock(&dasd_devmap_lock); |
01376f44 | 789 | if (val) |
1da177e4 LT |
790 | devmap->features |= DASD_FEATURE_READONLY; |
791 | else | |
792 | devmap->features &= ~DASD_FEATURE_READONLY; | |
33b62a30 SW |
793 | device = devmap->device; |
794 | if (device) { | |
795 | device->features = devmap->features; | |
796 | val = val || test_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
797 | } | |
1da177e4 | 798 | spin_unlock(&dasd_devmap_lock); |
33b62a30 SW |
799 | if (device && device->block && device->block->gdp) |
800 | set_disk_ro(device->block->gdp, val); | |
1da177e4 LT |
801 | return count; |
802 | } | |
803 | ||
804 | static DEVICE_ATTR(readonly, 0644, dasd_ro_show, dasd_ro_store); | |
9575bf26 HH |
805 | /* |
806 | * erplog controls the logging of ERP related data | |
807 | * (e.g. failing channel programs). | |
808 | */ | |
809 | static ssize_t | |
810 | dasd_erplog_show(struct device *dev, struct device_attribute *attr, char *buf) | |
811 | { | |
812 | struct dasd_devmap *devmap; | |
813 | int erplog; | |
814 | ||
2a0217d5 | 815 | devmap = dasd_find_busid(dev_name(dev)); |
9575bf26 HH |
816 | if (!IS_ERR(devmap)) |
817 | erplog = (devmap->features & DASD_FEATURE_ERPLOG) != 0; | |
818 | else | |
819 | erplog = (DASD_FEATURE_DEFAULT & DASD_FEATURE_ERPLOG) != 0; | |
820 | return snprintf(buf, PAGE_SIZE, erplog ? "1\n" : "0\n"); | |
821 | } | |
822 | ||
823 | static ssize_t | |
824 | dasd_erplog_store(struct device *dev, struct device_attribute *attr, | |
825 | const char *buf, size_t count) | |
826 | { | |
827 | struct dasd_devmap *devmap; | |
828 | int val; | |
829 | char *endp; | |
830 | ||
831 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
832 | if (IS_ERR(devmap)) | |
833 | return PTR_ERR(devmap); | |
834 | ||
835 | val = simple_strtoul(buf, &endp, 0); | |
836 | if (((endp + 1) < (buf + count)) || (val > 1)) | |
837 | return -EINVAL; | |
838 | ||
839 | spin_lock(&dasd_devmap_lock); | |
840 | if (val) | |
841 | devmap->features |= DASD_FEATURE_ERPLOG; | |
842 | else | |
843 | devmap->features &= ~DASD_FEATURE_ERPLOG; | |
844 | if (devmap->device) | |
845 | devmap->device->features = devmap->features; | |
846 | spin_unlock(&dasd_devmap_lock); | |
847 | return count; | |
848 | } | |
849 | ||
850 | static DEVICE_ATTR(erplog, 0644, dasd_erplog_show, dasd_erplog_store); | |
1da177e4 LT |
851 | |
852 | /* | |
853 | * use_diag controls whether the driver should use diag rather than ssch | |
854 | * to talk to the device | |
855 | */ | |
138c014d | 856 | static ssize_t |
e404e274 | 857 | dasd_use_diag_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
858 | { |
859 | struct dasd_devmap *devmap; | |
860 | int use_diag; | |
861 | ||
2a0217d5 | 862 | devmap = dasd_find_busid(dev_name(dev)); |
1da177e4 LT |
863 | if (!IS_ERR(devmap)) |
864 | use_diag = (devmap->features & DASD_FEATURE_USEDIAG) != 0; | |
865 | else | |
866 | use_diag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USEDIAG) != 0; | |
867 | return sprintf(buf, use_diag ? "1\n" : "0\n"); | |
868 | } | |
869 | ||
870 | static ssize_t | |
138c014d HH |
871 | dasd_use_diag_store(struct device *dev, struct device_attribute *attr, |
872 | const char *buf, size_t count) | |
1da177e4 LT |
873 | { |
874 | struct dasd_devmap *devmap; | |
875 | ssize_t rc; | |
01376f44 HH |
876 | int val; |
877 | char *endp; | |
1da177e4 LT |
878 | |
879 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
880 | if (IS_ERR(devmap)) | |
881 | return PTR_ERR(devmap); | |
01376f44 HH |
882 | |
883 | val = simple_strtoul(buf, &endp, 0); | |
884 | if (((endp + 1) < (buf + count)) || (val > 1)) | |
885 | return -EINVAL; | |
886 | ||
1da177e4 LT |
887 | spin_lock(&dasd_devmap_lock); |
888 | /* Changing diag discipline flag is only allowed in offline state. */ | |
889 | rc = count; | |
e4dbb0f2 | 890 | if (!devmap->device && !(devmap->features & DASD_FEATURE_USERAW)) { |
01376f44 | 891 | if (val) |
1da177e4 LT |
892 | devmap->features |= DASD_FEATURE_USEDIAG; |
893 | else | |
894 | devmap->features &= ~DASD_FEATURE_USEDIAG; | |
895 | } else | |
896 | rc = -EPERM; | |
897 | spin_unlock(&dasd_devmap_lock); | |
898 | return rc; | |
899 | } | |
900 | ||
138c014d | 901 | static DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store); |
1da177e4 | 902 | |
e4dbb0f2 SH |
903 | /* |
904 | * use_raw controls whether the driver should give access to raw eckd data or | |
905 | * operate in standard mode | |
906 | */ | |
907 | static ssize_t | |
908 | dasd_use_raw_show(struct device *dev, struct device_attribute *attr, char *buf) | |
909 | { | |
910 | struct dasd_devmap *devmap; | |
911 | int use_raw; | |
912 | ||
913 | devmap = dasd_find_busid(dev_name(dev)); | |
914 | if (!IS_ERR(devmap)) | |
915 | use_raw = (devmap->features & DASD_FEATURE_USERAW) != 0; | |
916 | else | |
917 | use_raw = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USERAW) != 0; | |
918 | return sprintf(buf, use_raw ? "1\n" : "0\n"); | |
919 | } | |
920 | ||
921 | static ssize_t | |
922 | dasd_use_raw_store(struct device *dev, struct device_attribute *attr, | |
923 | const char *buf, size_t count) | |
924 | { | |
925 | struct dasd_devmap *devmap; | |
926 | ssize_t rc; | |
927 | unsigned long val; | |
928 | ||
929 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
930 | if (IS_ERR(devmap)) | |
931 | return PTR_ERR(devmap); | |
932 | ||
0178722b | 933 | if ((kstrtoul(buf, 10, &val) != 0) || val > 1) |
e4dbb0f2 SH |
934 | return -EINVAL; |
935 | ||
936 | spin_lock(&dasd_devmap_lock); | |
937 | /* Changing diag discipline flag is only allowed in offline state. */ | |
938 | rc = count; | |
939 | if (!devmap->device && !(devmap->features & DASD_FEATURE_USEDIAG)) { | |
940 | if (val) | |
941 | devmap->features |= DASD_FEATURE_USERAW; | |
942 | else | |
943 | devmap->features &= ~DASD_FEATURE_USERAW; | |
944 | } else | |
945 | rc = -EPERM; | |
946 | spin_unlock(&dasd_devmap_lock); | |
947 | return rc; | |
948 | } | |
949 | ||
950 | static DEVICE_ATTR(raw_track_access, 0644, dasd_use_raw_show, | |
951 | dasd_use_raw_store); | |
952 | ||
d07dc5d8 SH |
953 | static ssize_t |
954 | dasd_safe_offline_store(struct device *dev, struct device_attribute *attr, | |
955 | const char *buf, size_t count) | |
956 | { | |
957 | struct ccw_device *cdev = to_ccwdev(dev); | |
958 | struct dasd_device *device; | |
959 | int rc; | |
960 | ||
961 | device = dasd_device_from_cdev(cdev); | |
962 | if (IS_ERR(device)) { | |
963 | rc = PTR_ERR(device); | |
964 | goto out; | |
965 | } | |
966 | ||
967 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || | |
968 | test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { | |
969 | /* Already doing offline processing */ | |
970 | dasd_put_device(device); | |
971 | rc = -EBUSY; | |
972 | goto out; | |
973 | } | |
974 | ||
975 | set_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags); | |
976 | dasd_put_device(device); | |
977 | ||
978 | rc = ccw_device_set_offline(cdev); | |
979 | ||
980 | out: | |
981 | return rc ? rc : count; | |
982 | } | |
983 | ||
984 | static DEVICE_ATTR(safe_offline, 0200, NULL, dasd_safe_offline_store); | |
985 | ||
1da177e4 | 986 | static ssize_t |
138c014d HH |
987 | dasd_discipline_show(struct device *dev, struct device_attribute *attr, |
988 | char *buf) | |
1da177e4 | 989 | { |
a00bfd71 MS |
990 | struct dasd_device *device; |
991 | ssize_t len; | |
1da177e4 | 992 | |
a00bfd71 | 993 | device = dasd_device_from_cdev(to_ccwdev(dev)); |
589c74d5 SH |
994 | if (IS_ERR(device)) |
995 | goto out; | |
996 | else if (!device->discipline) { | |
997 | dasd_put_device(device); | |
998 | goto out; | |
999 | } else { | |
a00bfd71 MS |
1000 | len = snprintf(buf, PAGE_SIZE, "%s\n", |
1001 | device->discipline->name); | |
1002 | dasd_put_device(device); | |
589c74d5 SH |
1003 | return len; |
1004 | } | |
1005 | out: | |
1006 | len = snprintf(buf, PAGE_SIZE, "none\n"); | |
a00bfd71 | 1007 | return len; |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL); | |
1011 | ||
4dfd5c45 HH |
1012 | static ssize_t |
1013 | dasd_device_status_show(struct device *dev, struct device_attribute *attr, | |
1014 | char *buf) | |
1015 | { | |
1016 | struct dasd_device *device; | |
1017 | ssize_t len; | |
1018 | ||
1019 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1020 | if (!IS_ERR(device)) { | |
1021 | switch (device->state) { | |
1022 | case DASD_STATE_NEW: | |
1023 | len = snprintf(buf, PAGE_SIZE, "new\n"); | |
1024 | break; | |
1025 | case DASD_STATE_KNOWN: | |
1026 | len = snprintf(buf, PAGE_SIZE, "detected\n"); | |
1027 | break; | |
1028 | case DASD_STATE_BASIC: | |
1029 | len = snprintf(buf, PAGE_SIZE, "basic\n"); | |
1030 | break; | |
1031 | case DASD_STATE_UNFMT: | |
1032 | len = snprintf(buf, PAGE_SIZE, "unformatted\n"); | |
1033 | break; | |
1034 | case DASD_STATE_READY: | |
1035 | len = snprintf(buf, PAGE_SIZE, "ready\n"); | |
1036 | break; | |
1037 | case DASD_STATE_ONLINE: | |
1038 | len = snprintf(buf, PAGE_SIZE, "online\n"); | |
1039 | break; | |
1040 | default: | |
1041 | len = snprintf(buf, PAGE_SIZE, "no stat\n"); | |
1042 | break; | |
1043 | } | |
1044 | dasd_put_device(device); | |
1045 | } else | |
1046 | len = snprintf(buf, PAGE_SIZE, "unknown\n"); | |
1047 | return len; | |
1048 | } | |
1049 | ||
1050 | static DEVICE_ATTR(status, 0444, dasd_device_status_show, NULL); | |
1051 | ||
2dedf0d9 SH |
1052 | static ssize_t dasd_alias_show(struct device *dev, |
1053 | struct device_attribute *attr, char *buf) | |
3d052595 | 1054 | { |
2dedf0d9 SH |
1055 | struct dasd_device *device; |
1056 | struct dasd_uid uid; | |
3d052595 | 1057 | |
2dedf0d9 SH |
1058 | device = dasd_device_from_cdev(to_ccwdev(dev)); |
1059 | if (IS_ERR(device)) | |
8e09f215 | 1060 | return sprintf(buf, "0\n"); |
2dedf0d9 SH |
1061 | |
1062 | if (device->discipline && device->discipline->get_uid && | |
1063 | !device->discipline->get_uid(device, &uid)) { | |
1064 | if (uid.type == UA_BASE_PAV_ALIAS || | |
0abccf77 SH |
1065 | uid.type == UA_HYPER_PAV_ALIAS) { |
1066 | dasd_put_device(device); | |
2dedf0d9 | 1067 | return sprintf(buf, "1\n"); |
0abccf77 | 1068 | } |
8e09f215 | 1069 | } |
2dedf0d9 SH |
1070 | dasd_put_device(device); |
1071 | ||
1072 | return sprintf(buf, "0\n"); | |
3d052595 HH |
1073 | } |
1074 | ||
1075 | static DEVICE_ATTR(alias, 0444, dasd_alias_show, NULL); | |
1076 | ||
2dedf0d9 SH |
1077 | static ssize_t dasd_vendor_show(struct device *dev, |
1078 | struct device_attribute *attr, char *buf) | |
3d052595 | 1079 | { |
2dedf0d9 SH |
1080 | struct dasd_device *device; |
1081 | struct dasd_uid uid; | |
3d052595 HH |
1082 | char *vendor; |
1083 | ||
2dedf0d9 SH |
1084 | device = dasd_device_from_cdev(to_ccwdev(dev)); |
1085 | vendor = ""; | |
1086 | if (IS_ERR(device)) | |
1087 | return snprintf(buf, PAGE_SIZE, "%s\n", vendor); | |
1088 | ||
1089 | if (device->discipline && device->discipline->get_uid && | |
1090 | !device->discipline->get_uid(device, &uid)) | |
1091 | vendor = uid.vendor; | |
1092 | ||
1093 | dasd_put_device(device); | |
3d052595 HH |
1094 | |
1095 | return snprintf(buf, PAGE_SIZE, "%s\n", vendor); | |
1096 | } | |
1097 | ||
1098 | static DEVICE_ATTR(vendor, 0444, dasd_vendor_show, NULL); | |
1099 | ||
1100 | #define UID_STRLEN ( /* vendor */ 3 + 1 + /* serial */ 14 + 1 +\ | |
4abb08c2 SW |
1101 | /* SSID */ 4 + 1 + /* unit addr */ 2 + 1 +\ |
1102 | /* vduit */ 32 + 1) | |
3d052595 HH |
1103 | |
1104 | static ssize_t | |
1105 | dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1106 | { | |
2dedf0d9 SH |
1107 | struct dasd_device *device; |
1108 | struct dasd_uid uid; | |
8e09f215 SW |
1109 | char uid_string[UID_STRLEN]; |
1110 | char ua_string[3]; | |
3d052595 | 1111 | |
2dedf0d9 SH |
1112 | device = dasd_device_from_cdev(to_ccwdev(dev)); |
1113 | uid_string[0] = 0; | |
1114 | if (IS_ERR(device)) | |
1115 | return snprintf(buf, PAGE_SIZE, "%s\n", uid_string); | |
1116 | ||
1117 | if (device->discipline && device->discipline->get_uid && | |
1118 | !device->discipline->get_uid(device, &uid)) { | |
1119 | switch (uid.type) { | |
1120 | case UA_BASE_DEVICE: | |
1121 | snprintf(ua_string, sizeof(ua_string), "%02x", | |
1122 | uid.real_unit_addr); | |
1123 | break; | |
1124 | case UA_BASE_PAV_ALIAS: | |
1125 | snprintf(ua_string, sizeof(ua_string), "%02x", | |
1126 | uid.base_unit_addr); | |
1127 | break; | |
1128 | case UA_HYPER_PAV_ALIAS: | |
1129 | snprintf(ua_string, sizeof(ua_string), "xx"); | |
1130 | break; | |
1131 | default: | |
1132 | /* should not happen, treat like base device */ | |
1133 | snprintf(ua_string, sizeof(ua_string), "%02x", | |
1134 | uid.real_unit_addr); | |
1135 | break; | |
1136 | } | |
1137 | ||
1138 | if (strlen(uid.vduit) > 0) | |
1139 | snprintf(uid_string, sizeof(uid_string), | |
1140 | "%s.%s.%04x.%s.%s", | |
1141 | uid.vendor, uid.serial, uid.ssid, ua_string, | |
1142 | uid.vduit); | |
1143 | else | |
1144 | snprintf(uid_string, sizeof(uid_string), | |
1145 | "%s.%s.%04x.%s", | |
1146 | uid.vendor, uid.serial, uid.ssid, ua_string); | |
8e09f215 | 1147 | } |
2dedf0d9 SH |
1148 | dasd_put_device(device); |
1149 | ||
8e09f215 | 1150 | return snprintf(buf, PAGE_SIZE, "%s\n", uid_string); |
3d052595 | 1151 | } |
3d052595 HH |
1152 | static DEVICE_ATTR(uid, 0444, dasd_uid_show, NULL); |
1153 | ||
20c64468 SW |
1154 | /* |
1155 | * extended error-reporting | |
1156 | */ | |
1157 | static ssize_t | |
1158 | dasd_eer_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1159 | { | |
1160 | struct dasd_devmap *devmap; | |
1161 | int eer_flag; | |
1162 | ||
2a0217d5 | 1163 | devmap = dasd_find_busid(dev_name(dev)); |
20c64468 SW |
1164 | if (!IS_ERR(devmap) && devmap->device) |
1165 | eer_flag = dasd_eer_enabled(devmap->device); | |
1166 | else | |
1167 | eer_flag = 0; | |
1168 | return snprintf(buf, PAGE_SIZE, eer_flag ? "1\n" : "0\n"); | |
1169 | } | |
1170 | ||
1171 | static ssize_t | |
1172 | dasd_eer_store(struct device *dev, struct device_attribute *attr, | |
1173 | const char *buf, size_t count) | |
1174 | { | |
1175 | struct dasd_devmap *devmap; | |
01376f44 HH |
1176 | int val, rc; |
1177 | char *endp; | |
20c64468 SW |
1178 | |
1179 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
1180 | if (IS_ERR(devmap)) | |
1181 | return PTR_ERR(devmap); | |
1182 | if (!devmap->device) | |
01376f44 HH |
1183 | return -ENODEV; |
1184 | ||
1185 | val = simple_strtoul(buf, &endp, 0); | |
1186 | if (((endp + 1) < (buf + count)) || (val > 1)) | |
1187 | return -EINVAL; | |
1188 | ||
645c98c8 | 1189 | if (val) { |
20c64468 | 1190 | rc = dasd_eer_enable(devmap->device); |
645c98c8 HH |
1191 | if (rc) |
1192 | return rc; | |
1193 | } else | |
20c64468 | 1194 | dasd_eer_disable(devmap->device); |
645c98c8 | 1195 | return count; |
20c64468 SW |
1196 | } |
1197 | ||
1198 | static DEVICE_ATTR(eer_enabled, 0644, dasd_eer_show, dasd_eer_store); | |
1199 | ||
7c8faa86 SH |
1200 | /* |
1201 | * expiration time for default requests | |
1202 | */ | |
1203 | static ssize_t | |
1204 | dasd_expires_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1205 | { | |
1206 | struct dasd_device *device; | |
1207 | int len; | |
1208 | ||
1209 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1210 | if (IS_ERR(device)) | |
1211 | return -ENODEV; | |
1212 | len = snprintf(buf, PAGE_SIZE, "%lu\n", device->default_expires); | |
1213 | dasd_put_device(device); | |
1214 | return len; | |
1215 | } | |
1216 | ||
1217 | static ssize_t | |
1218 | dasd_expires_store(struct device *dev, struct device_attribute *attr, | |
1219 | const char *buf, size_t count) | |
1220 | { | |
1221 | struct dasd_device *device; | |
1222 | unsigned long val; | |
1223 | ||
1224 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1225 | if (IS_ERR(device)) | |
1226 | return -ENODEV; | |
1227 | ||
0178722b | 1228 | if ((kstrtoul(buf, 10, &val) != 0) || |
7c8faa86 SH |
1229 | (val > DASD_EXPIRES_MAX) || val == 0) { |
1230 | dasd_put_device(device); | |
1231 | return -EINVAL; | |
1232 | } | |
1233 | ||
1234 | if (val) | |
1235 | device->default_expires = val; | |
1236 | ||
1237 | dasd_put_device(device); | |
1238 | return count; | |
1239 | } | |
1240 | ||
1241 | static DEVICE_ATTR(expires, 0644, dasd_expires_show, dasd_expires_store); | |
1242 | ||
1f1ee9ad HR |
1243 | static ssize_t |
1244 | dasd_retries_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1245 | { | |
1246 | struct dasd_device *device; | |
1247 | int len; | |
1248 | ||
1249 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1250 | if (IS_ERR(device)) | |
1251 | return -ENODEV; | |
1252 | len = snprintf(buf, PAGE_SIZE, "%lu\n", device->default_retries); | |
1253 | dasd_put_device(device); | |
1254 | return len; | |
1255 | } | |
1256 | ||
1257 | static ssize_t | |
1258 | dasd_retries_store(struct device *dev, struct device_attribute *attr, | |
1259 | const char *buf, size_t count) | |
1260 | { | |
1261 | struct dasd_device *device; | |
1262 | unsigned long val; | |
1263 | ||
1264 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1265 | if (IS_ERR(device)) | |
1266 | return -ENODEV; | |
1267 | ||
0178722b | 1268 | if ((kstrtoul(buf, 10, &val) != 0) || |
1f1ee9ad HR |
1269 | (val > DASD_RETRIES_MAX)) { |
1270 | dasd_put_device(device); | |
1271 | return -EINVAL; | |
1272 | } | |
1273 | ||
1274 | if (val) | |
1275 | device->default_retries = val; | |
1276 | ||
1277 | dasd_put_device(device); | |
1278 | return count; | |
1279 | } | |
1280 | ||
1281 | static DEVICE_ATTR(retries, 0644, dasd_retries_show, dasd_retries_store); | |
1282 | ||
3d71ad32 HR |
1283 | static ssize_t |
1284 | dasd_timeout_show(struct device *dev, struct device_attribute *attr, | |
1285 | char *buf) | |
1286 | { | |
1287 | struct dasd_device *device; | |
1288 | int len; | |
1289 | ||
1290 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1291 | if (IS_ERR(device)) | |
1292 | return -ENODEV; | |
1293 | len = snprintf(buf, PAGE_SIZE, "%lu\n", device->blk_timeout); | |
1294 | dasd_put_device(device); | |
1295 | return len; | |
1296 | } | |
1297 | ||
1298 | static ssize_t | |
1299 | dasd_timeout_store(struct device *dev, struct device_attribute *attr, | |
1300 | const char *buf, size_t count) | |
1301 | { | |
1302 | struct dasd_device *device; | |
1303 | struct request_queue *q; | |
1304 | unsigned long val, flags; | |
1305 | ||
1306 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1307 | if (IS_ERR(device) || !device->block) | |
1308 | return -ENODEV; | |
1309 | ||
0178722b | 1310 | if ((kstrtoul(buf, 10, &val) != 0) || |
3d71ad32 HR |
1311 | val > UINT_MAX / HZ) { |
1312 | dasd_put_device(device); | |
1313 | return -EINVAL; | |
1314 | } | |
1315 | q = device->block->request_queue; | |
1316 | if (!q) { | |
1317 | dasd_put_device(device); | |
1318 | return -ENODEV; | |
1319 | } | |
1320 | spin_lock_irqsave(&device->block->request_queue_lock, flags); | |
1321 | if (!val) | |
1322 | blk_queue_rq_timed_out(q, NULL); | |
1323 | else | |
1324 | blk_queue_rq_timed_out(q, dasd_times_out); | |
1325 | ||
1326 | device->blk_timeout = val; | |
1327 | ||
1328 | blk_queue_rq_timeout(q, device->blk_timeout * HZ); | |
1329 | spin_unlock_irqrestore(&device->block->request_queue_lock, flags); | |
1330 | ||
1331 | dasd_put_device(device); | |
1332 | return count; | |
1333 | } | |
1334 | ||
1335 | static DEVICE_ATTR(timeout, 0644, | |
1336 | dasd_timeout_show, dasd_timeout_store); | |
1337 | ||
5a27e60d SW |
1338 | static ssize_t dasd_reservation_policy_show(struct device *dev, |
1339 | struct device_attribute *attr, | |
1340 | char *buf) | |
1341 | { | |
1342 | struct dasd_devmap *devmap; | |
1343 | int rc = 0; | |
1344 | ||
1345 | devmap = dasd_find_busid(dev_name(dev)); | |
1346 | if (IS_ERR(devmap)) { | |
1347 | rc = snprintf(buf, PAGE_SIZE, "ignore\n"); | |
1348 | } else { | |
1349 | spin_lock(&dasd_devmap_lock); | |
1350 | if (devmap->features & DASD_FEATURE_FAILONSLCK) | |
1351 | rc = snprintf(buf, PAGE_SIZE, "fail\n"); | |
1352 | else | |
1353 | rc = snprintf(buf, PAGE_SIZE, "ignore\n"); | |
1354 | spin_unlock(&dasd_devmap_lock); | |
1355 | } | |
1356 | return rc; | |
1357 | } | |
1358 | ||
1359 | static ssize_t dasd_reservation_policy_store(struct device *dev, | |
1360 | struct device_attribute *attr, | |
1361 | const char *buf, size_t count) | |
1362 | { | |
1363 | struct dasd_devmap *devmap; | |
1364 | int rc; | |
1365 | ||
1366 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
1367 | if (IS_ERR(devmap)) | |
1368 | return PTR_ERR(devmap); | |
1369 | rc = 0; | |
1370 | spin_lock(&dasd_devmap_lock); | |
1371 | if (sysfs_streq("ignore", buf)) | |
1372 | devmap->features &= ~DASD_FEATURE_FAILONSLCK; | |
1373 | else if (sysfs_streq("fail", buf)) | |
1374 | devmap->features |= DASD_FEATURE_FAILONSLCK; | |
1375 | else | |
1376 | rc = -EINVAL; | |
1377 | if (devmap->device) | |
1378 | devmap->device->features = devmap->features; | |
1379 | spin_unlock(&dasd_devmap_lock); | |
1380 | if (rc) | |
1381 | return rc; | |
1382 | else | |
1383 | return count; | |
1384 | } | |
1385 | ||
1386 | static DEVICE_ATTR(reservation_policy, 0644, | |
1387 | dasd_reservation_policy_show, dasd_reservation_policy_store); | |
1388 | ||
1389 | static ssize_t dasd_reservation_state_show(struct device *dev, | |
1390 | struct device_attribute *attr, | |
1391 | char *buf) | |
1392 | { | |
1393 | struct dasd_device *device; | |
1394 | int rc = 0; | |
1395 | ||
1396 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1397 | if (IS_ERR(device)) | |
1398 | return snprintf(buf, PAGE_SIZE, "none\n"); | |
1399 | ||
1400 | if (test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) | |
1401 | rc = snprintf(buf, PAGE_SIZE, "reserved\n"); | |
1402 | else if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags)) | |
1403 | rc = snprintf(buf, PAGE_SIZE, "lost\n"); | |
1404 | else | |
1405 | rc = snprintf(buf, PAGE_SIZE, "none\n"); | |
1406 | dasd_put_device(device); | |
1407 | return rc; | |
1408 | } | |
1409 | ||
1410 | static ssize_t dasd_reservation_state_store(struct device *dev, | |
1411 | struct device_attribute *attr, | |
1412 | const char *buf, size_t count) | |
1413 | { | |
1414 | struct dasd_device *device; | |
1415 | int rc = 0; | |
1416 | ||
1417 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1418 | if (IS_ERR(device)) | |
1419 | return -ENODEV; | |
1420 | if (sysfs_streq("reset", buf)) | |
1421 | clear_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
1422 | else | |
1423 | rc = -EINVAL; | |
1424 | dasd_put_device(device); | |
1425 | ||
1426 | if (rc) | |
1427 | return rc; | |
1428 | else | |
1429 | return count; | |
1430 | } | |
1431 | ||
1432 | static DEVICE_ATTR(last_known_reservation_state, 0644, | |
1433 | dasd_reservation_state_show, dasd_reservation_state_store); | |
1434 | ||
5db8440c SH |
1435 | static ssize_t dasd_pm_show(struct device *dev, |
1436 | struct device_attribute *attr, char *buf) | |
1437 | { | |
1438 | struct dasd_device *device; | |
1439 | u8 opm, nppm, cablepm, cuirpm, hpfpm; | |
1440 | ||
1441 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1442 | if (IS_ERR(device)) | |
1443 | return sprintf(buf, "0\n"); | |
1444 | ||
1445 | opm = device->path_data.opm; | |
1446 | nppm = device->path_data.npm; | |
1447 | cablepm = device->path_data.cablepm; | |
1448 | cuirpm = device->path_data.cuirpm; | |
1449 | hpfpm = device->path_data.hpfpm; | |
1450 | dasd_put_device(device); | |
1451 | ||
1452 | return sprintf(buf, "%02x %02x %02x %02x %02x\n", opm, nppm, | |
1453 | cablepm, cuirpm, hpfpm); | |
1454 | } | |
1455 | ||
1456 | static DEVICE_ATTR(path_masks, 0444, dasd_pm_show, NULL); | |
1457 | ||
1da177e4 LT |
1458 | static struct attribute * dasd_attrs[] = { |
1459 | &dev_attr_readonly.attr, | |
1460 | &dev_attr_discipline.attr, | |
4dfd5c45 | 1461 | &dev_attr_status.attr, |
3d052595 HH |
1462 | &dev_attr_alias.attr, |
1463 | &dev_attr_vendor.attr, | |
1464 | &dev_attr_uid.attr, | |
1da177e4 | 1465 | &dev_attr_use_diag.attr, |
e4dbb0f2 | 1466 | &dev_attr_raw_track_access.attr, |
20c64468 | 1467 | &dev_attr_eer_enabled.attr, |
9575bf26 | 1468 | &dev_attr_erplog.attr, |
13de227b | 1469 | &dev_attr_failfast.attr, |
7c8faa86 | 1470 | &dev_attr_expires.attr, |
1f1ee9ad | 1471 | &dev_attr_retries.attr, |
3d71ad32 | 1472 | &dev_attr_timeout.attr, |
5a27e60d SW |
1473 | &dev_attr_reservation_policy.attr, |
1474 | &dev_attr_last_known_reservation_state.attr, | |
d07dc5d8 | 1475 | &dev_attr_safe_offline.attr, |
5db8440c | 1476 | &dev_attr_path_masks.attr, |
1da177e4 LT |
1477 | NULL, |
1478 | }; | |
1479 | ||
1480 | static struct attribute_group dasd_attr_group = { | |
1481 | .attrs = dasd_attrs, | |
1482 | }; | |
1483 | ||
f24acd45 HH |
1484 | /* |
1485 | * Return value of the specified feature. | |
1486 | */ | |
1487 | int | |
1488 | dasd_get_feature(struct ccw_device *cdev, int feature) | |
1489 | { | |
1490 | struct dasd_devmap *devmap; | |
1491 | ||
2a0217d5 | 1492 | devmap = dasd_find_busid(dev_name(&cdev->dev)); |
f24acd45 | 1493 | if (IS_ERR(devmap)) |
40545573 | 1494 | return PTR_ERR(devmap); |
f24acd45 HH |
1495 | |
1496 | return ((devmap->features & feature) != 0); | |
1497 | } | |
1498 | ||
1499 | /* | |
1500 | * Set / reset given feature. | |
48fc7f7e | 1501 | * Flag indicates whether to set (!=0) or the reset (=0) the feature. |
f24acd45 HH |
1502 | */ |
1503 | int | |
1504 | dasd_set_feature(struct ccw_device *cdev, int feature, int flag) | |
1505 | { | |
1506 | struct dasd_devmap *devmap; | |
1507 | ||
2a0217d5 | 1508 | devmap = dasd_find_busid(dev_name(&cdev->dev)); |
f24acd45 | 1509 | if (IS_ERR(devmap)) |
40545573 | 1510 | return PTR_ERR(devmap); |
f24acd45 HH |
1511 | |
1512 | spin_lock(&dasd_devmap_lock); | |
1513 | if (flag) | |
1514 | devmap->features |= feature; | |
1515 | else | |
1516 | devmap->features &= ~feature; | |
c6eb7b77 HH |
1517 | if (devmap->device) |
1518 | devmap->device->features = devmap->features; | |
f24acd45 HH |
1519 | spin_unlock(&dasd_devmap_lock); |
1520 | return 0; | |
1521 | } | |
1522 | ||
1523 | ||
1da177e4 LT |
1524 | int |
1525 | dasd_add_sysfs_files(struct ccw_device *cdev) | |
1526 | { | |
1527 | return sysfs_create_group(&cdev->dev.kobj, &dasd_attr_group); | |
1528 | } | |
1529 | ||
1530 | void | |
1531 | dasd_remove_sysfs_files(struct ccw_device *cdev) | |
1532 | { | |
1533 | sysfs_remove_group(&cdev->dev.kobj, &dasd_attr_group); | |
1534 | } | |
1535 | ||
1536 | ||
1537 | int | |
1538 | dasd_devmap_init(void) | |
1539 | { | |
1540 | int i; | |
1541 | ||
1542 | /* Initialize devmap structures. */ | |
1543 | dasd_max_devindex = 0; | |
1544 | for (i = 0; i < 256; i++) | |
1545 | INIT_LIST_HEAD(&dasd_hashlists[i]); | |
40545573 | 1546 | return 0; |
1da177e4 LT |
1547 | } |
1548 | ||
1549 | void | |
1550 | dasd_devmap_exit(void) | |
1551 | { | |
1552 | dasd_forget_ranges(); | |
1553 | } |