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firmware: change firmware_kset to firmware_kobj
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / s390 / kernel / ipl.c
blobb97694fa62ecb26377db4e3a5349e50e68042979
1 /*
2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright (C) IBM Corp. 2005,2006
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
9 */
10
11 #include <linux/types.h>
12 #include <linux/module.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
17 #include <asm/ipl.h>
18 #include <asm/smp.h>
19 #include <asm/setup.h>
20 #include <asm/cpcmd.h>
21 #include <asm/cio.h>
22 #include <asm/ebcdic.h>
23 #include <asm/reset.h>
24 #include <asm/sclp.h>
25
26 #define IPL_PARM_BLOCK_VERSION 0
27
28 #define IPL_UNKNOWN_STR "unknown"
29 #define IPL_CCW_STR "ccw"
30 #define IPL_FCP_STR "fcp"
31 #define IPL_FCP_DUMP_STR "fcp_dump"
32 #define IPL_NSS_STR "nss"
33
34 static char *ipl_type_str(enum ipl_type type)
35 {
36 switch (type) {
37 case IPL_TYPE_CCW:
38 return IPL_CCW_STR;
39 case IPL_TYPE_FCP:
40 return IPL_FCP_STR;
41 case IPL_TYPE_FCP_DUMP:
42 return IPL_FCP_DUMP_STR;
43 case IPL_TYPE_NSS:
44 return IPL_NSS_STR;
45 case IPL_TYPE_UNKNOWN:
46 default:
47 return IPL_UNKNOWN_STR;
48 }
49 }
50
51 enum dump_type {
52 DUMP_TYPE_NONE = 1,
53 DUMP_TYPE_CCW = 2,
54 DUMP_TYPE_FCP = 4,
55 };
56
57 #define DUMP_NONE_STR "none"
58 #define DUMP_CCW_STR "ccw"
59 #define DUMP_FCP_STR "fcp"
60
61 static char *dump_type_str(enum dump_type type)
62 {
63 switch (type) {
64 case DUMP_TYPE_NONE:
65 return DUMP_NONE_STR;
66 case DUMP_TYPE_CCW:
67 return DUMP_CCW_STR;
68 case DUMP_TYPE_FCP:
69 return DUMP_FCP_STR;
70 default:
71 return NULL;
72 }
73 }
74
75 /*
76 * Must be in data section since the bss section
77 * is not cleared when these are accessed.
78 */
79 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
80 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
81
82 enum ipl_method {
83 REIPL_METHOD_CCW_CIO,
84 REIPL_METHOD_CCW_DIAG,
85 REIPL_METHOD_CCW_VM,
86 REIPL_METHOD_FCP_RO_DIAG,
87 REIPL_METHOD_FCP_RW_DIAG,
88 REIPL_METHOD_FCP_RO_VM,
89 REIPL_METHOD_FCP_DUMP,
90 REIPL_METHOD_NSS,
91 REIPL_METHOD_DEFAULT,
92 };
93
94 enum dump_method {
95 DUMP_METHOD_NONE,
96 DUMP_METHOD_CCW_CIO,
97 DUMP_METHOD_CCW_DIAG,
98 DUMP_METHOD_CCW_VM,
99 DUMP_METHOD_FCP_DIAG,
100 };
101
102 enum shutdown_action {
103 SHUTDOWN_REIPL,
104 SHUTDOWN_DUMP,
105 SHUTDOWN_STOP,
106 };
107
108 #define SHUTDOWN_REIPL_STR "reipl"
109 #define SHUTDOWN_DUMP_STR "dump"
110 #define SHUTDOWN_STOP_STR "stop"
111
112 static char *shutdown_action_str(enum shutdown_action action)
113 {
114 switch (action) {
115 case SHUTDOWN_REIPL:
116 return SHUTDOWN_REIPL_STR;
117 case SHUTDOWN_DUMP:
118 return SHUTDOWN_DUMP_STR;
119 case SHUTDOWN_STOP:
120 return SHUTDOWN_STOP_STR;
121 default:
122 return NULL;
123 }
124 }
125
126 static int diag308_set_works = 0;
127
128 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
129
130 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
131 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
132 static struct ipl_parameter_block *reipl_block_fcp;
133 static struct ipl_parameter_block *reipl_block_ccw;
134
135 static char reipl_nss_name[NSS_NAME_SIZE + 1];
136
137 static int dump_capabilities = DUMP_TYPE_NONE;
138 static enum dump_type dump_type = DUMP_TYPE_NONE;
139 static enum dump_method dump_method = DUMP_METHOD_NONE;
140 static struct ipl_parameter_block *dump_block_fcp;
141 static struct ipl_parameter_block *dump_block_ccw;
142
143 static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
144
145 static struct sclp_ipl_info sclp_ipl_info;
146
147 int diag308(unsigned long subcode, void *addr)
148 {
149 register unsigned long _addr asm("0") = (unsigned long) addr;
150 register unsigned long _rc asm("1") = 0;
151
152 asm volatile(
153 " diag %0,%2,0x308\n"
154 "0:\n"
155 EX_TABLE(0b,0b)
156 : "+d" (_addr), "+d" (_rc)
157 : "d" (subcode) : "cc", "memory");
158 return _rc;
159 }
160 EXPORT_SYMBOL_GPL(diag308);
161
162 /* SYSFS */
163
164 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
165 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
166 struct kobj_attribute *attr, \
167 char *page) \
168 { \
169 return sprintf(page, _format, _value); \
170 } \
171 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
172 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
173
174 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
175 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
176 struct kobj_attribute *attr, \
177 char *page) \
178 { \
179 return sprintf(page, _fmt_out, \
180 (unsigned long long) _value); \
181 } \
182 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
183 struct kobj_attribute *attr, \
184 const char *buf, size_t len) \
185 { \
186 unsigned long long value; \
187 if (sscanf(buf, _fmt_in, &value) != 1) \
188 return -EINVAL; \
189 _value = value; \
190 return len; \
191 } \
192 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
193 __ATTR(_name,(S_IRUGO | S_IWUSR), \
194 sys_##_prefix##_##_name##_show, \
195 sys_##_prefix##_##_name##_store);
196
197 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
198 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
199 struct kobj_attribute *attr, \
200 char *page) \
201 { \
202 return sprintf(page, _fmt_out, _value); \
203 } \
204 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
205 struct kobj_attribute *attr, \
206 const char *buf, size_t len) \
207 { \
208 if (sscanf(buf, _fmt_in, _value) != 1) \
209 return -EINVAL; \
210 return len; \
211 } \
212 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
213 __ATTR(_name,(S_IRUGO | S_IWUSR), \
214 sys_##_prefix##_##_name##_show, \
215 sys_##_prefix##_##_name##_store);
216
217 static void make_attrs_ro(struct attribute **attrs)
218 {
219 while (*attrs) {
220 (*attrs)->mode = S_IRUGO;
221 attrs++;
222 }
223 }
224
225 /*
226 * ipl section
227 */
228
229 static __init enum ipl_type get_ipl_type(void)
230 {
231 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
232
233 if (ipl_flags & IPL_NSS_VALID)
234 return IPL_TYPE_NSS;
235 if (!(ipl_flags & IPL_DEVNO_VALID))
236 return IPL_TYPE_UNKNOWN;
237 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
238 return IPL_TYPE_CCW;
239 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
240 return IPL_TYPE_UNKNOWN;
241 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
242 return IPL_TYPE_UNKNOWN;
243 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
244 return IPL_TYPE_FCP_DUMP;
245 return IPL_TYPE_FCP;
246 }
247
248 void __init setup_ipl_info(void)
249 {
250 ipl_info.type = get_ipl_type();
251 switch (ipl_info.type) {
252 case IPL_TYPE_CCW:
253 ipl_info.data.ccw.dev_id.devno = ipl_devno;
254 ipl_info.data.ccw.dev_id.ssid = 0;
255 break;
256 case IPL_TYPE_FCP:
257 case IPL_TYPE_FCP_DUMP:
258 ipl_info.data.fcp.dev_id.devno =
259 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
260 ipl_info.data.fcp.dev_id.ssid = 0;
261 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
262 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
263 break;
264 case IPL_TYPE_NSS:
265 strncpy(ipl_info.data.nss.name, kernel_nss_name,
266 sizeof(ipl_info.data.nss.name));
267 break;
268 case IPL_TYPE_UNKNOWN:
269 default:
270 /* We have no info to copy */
271 break;
272 }
273 }
274
275 struct ipl_info ipl_info;
276 EXPORT_SYMBOL_GPL(ipl_info);
277
278 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
279 char *page)
280 {
281 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
282 }
283
284 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
285
286 static ssize_t sys_ipl_device_show(struct kobject *kobj,
287 struct kobj_attribute *attr, char *page)
288 {
289 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
290
291 switch (ipl_info.type) {
292 case IPL_TYPE_CCW:
293 return sprintf(page, "0.0.%04x\n", ipl_devno);
294 case IPL_TYPE_FCP:
295 case IPL_TYPE_FCP_DUMP:
296 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
297 default:
298 return 0;
299 }
300 }
301
302 static struct kobj_attribute sys_ipl_device_attr =
303 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
304
305 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
306 char *buf, loff_t off, size_t count)
307 {
308 unsigned int size = IPL_PARMBLOCK_SIZE;
309
310 if (off > size)
311 return 0;
312 if (off + count > size)
313 count = size - off;
314 memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
315 return count;
316 }
317
318 static struct bin_attribute ipl_parameter_attr = {
319 .attr = {
320 .name = "binary_parameter",
321 .mode = S_IRUGO,
322 },
323 .size = PAGE_SIZE,
324 .read = &ipl_parameter_read,
325 };
326
327 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
328 char *buf, loff_t off, size_t count)
329 {
330 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
331 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
332
333 if (off > size)
334 return 0;
335 if (off + count > size)
336 count = size - off;
337 memcpy(buf, scp_data + off, count);
338 return count;
339 }
340
341 static struct bin_attribute ipl_scp_data_attr = {
342 .attr = {
343 .name = "scp_data",
344 .mode = S_IRUGO,
345 },
346 .size = PAGE_SIZE,
347 .read = ipl_scp_data_read,
348 };
349
350 /* FCP ipl device attributes */
351
352 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
353 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
354 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
355 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
356 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
357 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
358 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
359 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
360
361 static struct attribute *ipl_fcp_attrs[] = {
362 &sys_ipl_type_attr.attr,
363 &sys_ipl_device_attr.attr,
364 &sys_ipl_fcp_wwpn_attr.attr,
365 &sys_ipl_fcp_lun_attr.attr,
366 &sys_ipl_fcp_bootprog_attr.attr,
367 &sys_ipl_fcp_br_lba_attr.attr,
368 NULL,
369 };
370
371 static struct attribute_group ipl_fcp_attr_group = {
372 .attrs = ipl_fcp_attrs,
373 };
374
375 /* CCW ipl device attributes */
376
377 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
378 struct kobj_attribute *attr, char *page)
379 {
380 char loadparm[LOADPARM_LEN + 1] = {};
381
382 if (!sclp_ipl_info.is_valid)
383 return sprintf(page, "#unknown#\n");
384 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
385 EBCASC(loadparm, LOADPARM_LEN);
386 strstrip(loadparm);
387 return sprintf(page, "%s\n", loadparm);
388 }
389
390 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
391 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
392
393 static struct attribute *ipl_ccw_attrs[] = {
394 &sys_ipl_type_attr.attr,
395 &sys_ipl_device_attr.attr,
396 &sys_ipl_ccw_loadparm_attr.attr,
397 NULL,
398 };
399
400 static struct attribute_group ipl_ccw_attr_group = {
401 .attrs = ipl_ccw_attrs,
402 };
403
404 /* NSS ipl device attributes */
405
406 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
407
408 static struct attribute *ipl_nss_attrs[] = {
409 &sys_ipl_type_attr.attr,
410 &sys_ipl_nss_name_attr.attr,
411 NULL,
412 };
413
414 static struct attribute_group ipl_nss_attr_group = {
415 .attrs = ipl_nss_attrs,
416 };
417
418 /* UNKNOWN ipl device attributes */
419
420 static struct attribute *ipl_unknown_attrs[] = {
421 &sys_ipl_type_attr.attr,
422 NULL,
423 };
424
425 static struct attribute_group ipl_unknown_attr_group = {
426 .attrs = ipl_unknown_attrs,
427 };
428
429 static struct kset *ipl_kset;
430
431 /*
432 * reipl section
433 */
434
435 /* FCP reipl device attributes */
436
437 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
438 reipl_block_fcp->ipl_info.fcp.wwpn);
439 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
440 reipl_block_fcp->ipl_info.fcp.lun);
441 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
442 reipl_block_fcp->ipl_info.fcp.bootprog);
443 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
444 reipl_block_fcp->ipl_info.fcp.br_lba);
445 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
446 reipl_block_fcp->ipl_info.fcp.devno);
447
448 static struct attribute *reipl_fcp_attrs[] = {
449 &sys_reipl_fcp_device_attr.attr,
450 &sys_reipl_fcp_wwpn_attr.attr,
451 &sys_reipl_fcp_lun_attr.attr,
452 &sys_reipl_fcp_bootprog_attr.attr,
453 &sys_reipl_fcp_br_lba_attr.attr,
454 NULL,
455 };
456
457 static struct attribute_group reipl_fcp_attr_group = {
458 .name = IPL_FCP_STR,
459 .attrs = reipl_fcp_attrs,
460 };
461
462 /* CCW reipl device attributes */
463
464 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
465 reipl_block_ccw->ipl_info.ccw.devno);
466
467 static void reipl_get_ascii_loadparm(char *loadparm)
468 {
469 memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
470 LOADPARM_LEN);
471 EBCASC(loadparm, LOADPARM_LEN);
472 loadparm[LOADPARM_LEN] = 0;
473 strstrip(loadparm);
474 }
475
476 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
477 struct kobj_attribute *attr, char *page)
478 {
479 char buf[LOADPARM_LEN + 1];
480
481 reipl_get_ascii_loadparm(buf);
482 return sprintf(page, "%s\n", buf);
483 }
484
485 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
486 struct kobj_attribute *attr,
487 const char *buf, size_t len)
488 {
489 int i, lp_len;
490
491 /* ignore trailing newline */
492 lp_len = len;
493 if ((len > 0) && (buf[len - 1] == '\n'))
494 lp_len--;
495 /* loadparm can have max 8 characters and must not start with a blank */
496 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
497 return -EINVAL;
498 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
499 for (i = 0; i < lp_len; i++) {
500 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
501 (buf[i] == '.'))
502 continue;
503 return -EINVAL;
504 }
505 /* initialize loadparm with blanks */
506 memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
507 /* copy and convert to ebcdic */
508 memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
509 ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
510 return len;
511 }
512
513 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
514 __ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
515 reipl_ccw_loadparm_store);
516
517 static struct attribute *reipl_ccw_attrs[] = {
518 &sys_reipl_ccw_device_attr.attr,
519 &sys_reipl_ccw_loadparm_attr.attr,
520 NULL,
521 };
522
523 static struct attribute_group reipl_ccw_attr_group = {
524 .name = IPL_CCW_STR,
525 .attrs = reipl_ccw_attrs,
526 };
527
528
529 /* NSS reipl device attributes */
530
531 DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name);
532
533 static struct attribute *reipl_nss_attrs[] = {
534 &sys_reipl_nss_name_attr.attr,
535 NULL,
536 };
537
538 static struct attribute_group reipl_nss_attr_group = {
539 .name = IPL_NSS_STR,
540 .attrs = reipl_nss_attrs,
541 };
542
543 /* reipl type */
544
545 static int reipl_set_type(enum ipl_type type)
546 {
547 if (!(reipl_capabilities & type))
548 return -EINVAL;
549
550 switch(type) {
551 case IPL_TYPE_CCW:
552 if (MACHINE_IS_VM)
553 reipl_method = REIPL_METHOD_CCW_VM;
554 else
555 reipl_method = REIPL_METHOD_CCW_CIO;
556 break;
557 case IPL_TYPE_FCP:
558 if (diag308_set_works)
559 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
560 else if (MACHINE_IS_VM)
561 reipl_method = REIPL_METHOD_FCP_RO_VM;
562 else
563 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
564 break;
565 case IPL_TYPE_FCP_DUMP:
566 reipl_method = REIPL_METHOD_FCP_DUMP;
567 break;
568 case IPL_TYPE_NSS:
569 reipl_method = REIPL_METHOD_NSS;
570 break;
571 case IPL_TYPE_UNKNOWN:
572 reipl_method = REIPL_METHOD_DEFAULT;
573 break;
574 default:
575 BUG();
576 }
577 reipl_type = type;
578 return 0;
579 }
580
581 static ssize_t reipl_type_show(struct kobject *kobj,
582 struct kobj_attribute *attr, char *page)
583 {
584 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
585 }
586
587 static ssize_t reipl_type_store(struct kobject *kobj,
588 struct kobj_attribute *attr,
589 const char *buf, size_t len)
590 {
591 int rc = -EINVAL;
592
593 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
594 rc = reipl_set_type(IPL_TYPE_CCW);
595 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
596 rc = reipl_set_type(IPL_TYPE_FCP);
597 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
598 rc = reipl_set_type(IPL_TYPE_NSS);
599 return (rc != 0) ? rc : len;
600 }
601
602 static struct kobj_attribute reipl_type_attr =
603 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
604
605 static struct kset *reipl_kset;
606
607 /*
608 * dump section
609 */
610
611 /* FCP dump device attributes */
612
613 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
614 dump_block_fcp->ipl_info.fcp.wwpn);
615 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
616 dump_block_fcp->ipl_info.fcp.lun);
617 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
618 dump_block_fcp->ipl_info.fcp.bootprog);
619 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
620 dump_block_fcp->ipl_info.fcp.br_lba);
621 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
622 dump_block_fcp->ipl_info.fcp.devno);
623
624 static struct attribute *dump_fcp_attrs[] = {
625 &sys_dump_fcp_device_attr.attr,
626 &sys_dump_fcp_wwpn_attr.attr,
627 &sys_dump_fcp_lun_attr.attr,
628 &sys_dump_fcp_bootprog_attr.attr,
629 &sys_dump_fcp_br_lba_attr.attr,
630 NULL,
631 };
632
633 static struct attribute_group dump_fcp_attr_group = {
634 .name = IPL_FCP_STR,
635 .attrs = dump_fcp_attrs,
636 };
637
638 /* CCW dump device attributes */
639
640 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
641 dump_block_ccw->ipl_info.ccw.devno);
642
643 static struct attribute *dump_ccw_attrs[] = {
644 &sys_dump_ccw_device_attr.attr,
645 NULL,
646 };
647
648 static struct attribute_group dump_ccw_attr_group = {
649 .name = IPL_CCW_STR,
650 .attrs = dump_ccw_attrs,
651 };
652
653 /* dump type */
654
655 static int dump_set_type(enum dump_type type)
656 {
657 if (!(dump_capabilities & type))
658 return -EINVAL;
659 switch(type) {
660 case DUMP_TYPE_CCW:
661 if (MACHINE_IS_VM)
662 dump_method = DUMP_METHOD_CCW_VM;
663 else if (diag308_set_works)
664 dump_method = DUMP_METHOD_CCW_DIAG;
665 else
666 dump_method = DUMP_METHOD_CCW_CIO;
667 break;
668 case DUMP_TYPE_FCP:
669 dump_method = DUMP_METHOD_FCP_DIAG;
670 break;
671 default:
672 dump_method = DUMP_METHOD_NONE;
673 }
674 dump_type = type;
675 return 0;
676 }
677
678 static ssize_t dump_type_show(struct kobject *kobj,
679 struct kobj_attribute *attr, char *page)
680 {
681 return sprintf(page, "%s\n", dump_type_str(dump_type));
682 }
683
684 static ssize_t dump_type_store(struct kobject *kobj,
685 struct kobj_attribute *attr,
686 const char *buf, size_t len)
687 {
688 int rc = -EINVAL;
689
690 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
691 rc = dump_set_type(DUMP_TYPE_NONE);
692 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
693 rc = dump_set_type(DUMP_TYPE_CCW);
694 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
695 rc = dump_set_type(DUMP_TYPE_FCP);
696 return (rc != 0) ? rc : len;
697 }
698
699 static struct kobj_attribute dump_type_attr =
700 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
701
702 static struct kset *dump_kset;
703
704 /*
705 * Shutdown actions section
706 */
707
708 static struct kset *shutdown_actions_kset;
709
710 /* on panic */
711
712 static ssize_t on_panic_show(struct kobject *kobj,
713 struct kobj_attribute *attr, char *page)
714 {
715 return sprintf(page, "%s\n", shutdown_action_str(on_panic_action));
716 }
717
718 static ssize_t on_panic_store(struct kobject *kobj,
719 struct kobj_attribute *attr,
720 const char *buf, size_t len)
721 {
722 if (strncmp(buf, SHUTDOWN_REIPL_STR, strlen(SHUTDOWN_REIPL_STR)) == 0)
723 on_panic_action = SHUTDOWN_REIPL;
724 else if (strncmp(buf, SHUTDOWN_DUMP_STR,
725 strlen(SHUTDOWN_DUMP_STR)) == 0)
726 on_panic_action = SHUTDOWN_DUMP;
727 else if (strncmp(buf, SHUTDOWN_STOP_STR,
728 strlen(SHUTDOWN_STOP_STR)) == 0)
729 on_panic_action = SHUTDOWN_STOP;
730 else
731 return -EINVAL;
732
733 return len;
734 }
735
736 static struct kobj_attribute on_panic_attr =
737 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
738
739 void do_reipl(void)
740 {
741 struct ccw_dev_id devid;
742 static char buf[100];
743 char loadparm[LOADPARM_LEN + 1];
744
745 switch (reipl_method) {
746 case REIPL_METHOD_CCW_CIO:
747 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
748 if (ipl_info.type == IPL_TYPE_CCW && devid.devno == ipl_devno)
749 diag308(DIAG308_IPL, NULL);
750 devid.ssid = 0;
751 reipl_ccw_dev(&devid);
752 break;
753 case REIPL_METHOD_CCW_VM:
754 reipl_get_ascii_loadparm(loadparm);
755 if (strlen(loadparm) == 0)
756 sprintf(buf, "IPL %X CLEAR",
757 reipl_block_ccw->ipl_info.ccw.devno);
758 else
759 sprintf(buf, "IPL %X CLEAR LOADPARM '%s'",
760 reipl_block_ccw->ipl_info.ccw.devno, loadparm);
761 __cpcmd(buf, NULL, 0, NULL);
762 break;
763 case REIPL_METHOD_CCW_DIAG:
764 diag308(DIAG308_SET, reipl_block_ccw);
765 diag308(DIAG308_IPL, NULL);
766 break;
767 case REIPL_METHOD_FCP_RW_DIAG:
768 diag308(DIAG308_SET, reipl_block_fcp);
769 diag308(DIAG308_IPL, NULL);
770 break;
771 case REIPL_METHOD_FCP_RO_DIAG:
772 diag308(DIAG308_IPL, NULL);
773 break;
774 case REIPL_METHOD_FCP_RO_VM:
775 __cpcmd("IPL", NULL, 0, NULL);
776 break;
777 case REIPL_METHOD_NSS:
778 sprintf(buf, "IPL %s", reipl_nss_name);
779 __cpcmd(buf, NULL, 0, NULL);
780 break;
781 case REIPL_METHOD_DEFAULT:
782 if (MACHINE_IS_VM)
783 __cpcmd("IPL", NULL, 0, NULL);
784 diag308(DIAG308_IPL, NULL);
785 break;
786 case REIPL_METHOD_FCP_DUMP:
787 default:
788 break;
789 }
790 signal_processor(smp_processor_id(), sigp_stop_and_store_status);
791 }
792
793 static void do_dump(void)
794 {
795 struct ccw_dev_id devid;
796 static char buf[100];
797
798 switch (dump_method) {
799 case DUMP_METHOD_CCW_CIO:
800 smp_send_stop();
801 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
802 devid.ssid = 0;
803 reipl_ccw_dev(&devid);
804 break;
805 case DUMP_METHOD_CCW_VM:
806 smp_send_stop();
807 sprintf(buf, "STORE STATUS");
808 __cpcmd(buf, NULL, 0, NULL);
809 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
810 __cpcmd(buf, NULL, 0, NULL);
811 break;
812 case DUMP_METHOD_CCW_DIAG:
813 diag308(DIAG308_SET, dump_block_ccw);
814 diag308(DIAG308_DUMP, NULL);
815 break;
816 case DUMP_METHOD_FCP_DIAG:
817 diag308(DIAG308_SET, dump_block_fcp);
818 diag308(DIAG308_DUMP, NULL);
819 break;
820 case DUMP_METHOD_NONE:
821 default:
822 return;
823 }
824 printk(KERN_EMERG "Dump failed!\n");
825 }
826
827 /* init functions */
828
829 static int __init ipl_register_fcp_files(void)
830 {
831 int rc;
832
833 rc = sysfs_create_group(&ipl_kset->kobj,
834 &ipl_fcp_attr_group);
835 if (rc)
836 goto out;
837 rc = sysfs_create_bin_file(&ipl_kset->kobj,
838 &ipl_parameter_attr);
839 if (rc)
840 goto out_ipl_parm;
841 rc = sysfs_create_bin_file(&ipl_kset->kobj,
842 &ipl_scp_data_attr);
843 if (!rc)
844 goto out;
845
846 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
847
848 out_ipl_parm:
849 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
850 out:
851 return rc;
852 }
853
854 static int __init ipl_init(void)
855 {
856 int rc;
857
858 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
859 if (!ipl_kset)
860 return -ENOMEM;
861 switch (ipl_info.type) {
862 case IPL_TYPE_CCW:
863 rc = sysfs_create_group(&ipl_kset->kobj,
864 &ipl_ccw_attr_group);
865 break;
866 case IPL_TYPE_FCP:
867 case IPL_TYPE_FCP_DUMP:
868 rc = ipl_register_fcp_files();
869 break;
870 case IPL_TYPE_NSS:
871 rc = sysfs_create_group(&ipl_kset->kobj,
872 &ipl_nss_attr_group);
873 break;
874 default:
875 rc = sysfs_create_group(&ipl_kset->kobj,
876 &ipl_unknown_attr_group);
877 break;
878 }
879 if (rc)
880 kset_unregister(ipl_kset);
881 return rc;
882 }
883
884 static void __init reipl_probe(void)
885 {
886 void *buffer;
887
888 buffer = (void *) get_zeroed_page(GFP_KERNEL);
889 if (!buffer)
890 return;
891 if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
892 diag308_set_works = 1;
893 free_page((unsigned long)buffer);
894 }
895
896 static int __init reipl_nss_init(void)
897 {
898 int rc;
899
900 if (!MACHINE_IS_VM)
901 return 0;
902 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
903 if (rc)
904 return rc;
905 strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1);
906 reipl_capabilities |= IPL_TYPE_NSS;
907 return 0;
908 }
909
910 static int __init reipl_ccw_init(void)
911 {
912 int rc;
913
914 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
915 if (!reipl_block_ccw)
916 return -ENOMEM;
917 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_ccw_attr_group);
918 if (rc) {
919 free_page((unsigned long)reipl_block_ccw);
920 return rc;
921 }
922 reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
923 reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
924 reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
925 reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
926 /* check if read scp info worked and set loadparm */
927 if (sclp_ipl_info.is_valid)
928 memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
929 &sclp_ipl_info.loadparm, LOADPARM_LEN);
930 else
931 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
932 memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
933 LOADPARM_LEN);
934 /* FIXME: check for diag308_set_works when enabling diag ccw reipl */
935 if (!MACHINE_IS_VM)
936 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
937 if (ipl_info.type == IPL_TYPE_CCW)
938 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
939 reipl_capabilities |= IPL_TYPE_CCW;
940 return 0;
941 }
942
943 static int __init reipl_fcp_init(void)
944 {
945 int rc;
946
947 if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
948 return 0;
949 if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
950 make_attrs_ro(reipl_fcp_attrs);
951
952 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
953 if (!reipl_block_fcp)
954 return -ENOMEM;
955 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group);
956 if (rc) {
957 free_page((unsigned long)reipl_block_fcp);
958 return rc;
959 }
960 if (ipl_info.type == IPL_TYPE_FCP) {
961 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
962 } else {
963 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
964 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
965 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
966 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
967 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
968 }
969 reipl_capabilities |= IPL_TYPE_FCP;
970 return 0;
971 }
972
973 static int __init reipl_init(void)
974 {
975 int rc;
976
977 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
978 if (!reipl_kset)
979 return -ENOMEM;
980 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
981 if (rc) {
982 kset_unregister(reipl_kset);
983 return rc;
984 }
985 rc = reipl_ccw_init();
986 if (rc)
987 return rc;
988 rc = reipl_fcp_init();
989 if (rc)
990 return rc;
991 rc = reipl_nss_init();
992 if (rc)
993 return rc;
994 rc = reipl_set_type(ipl_info.type);
995 if (rc)
996 return rc;
997 return 0;
998 }
999
1000 static int __init dump_ccw_init(void)
1001 {
1002 int rc;
1003
1004 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1005 if (!dump_block_ccw)
1006 return -ENOMEM;
1007 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1008 if (rc) {
1009 free_page((unsigned long)dump_block_ccw);
1010 return rc;
1011 }
1012 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1013 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1014 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1015 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1016 dump_capabilities |= DUMP_TYPE_CCW;
1017 return 0;
1018 }
1019
1020 static int __init dump_fcp_init(void)
1021 {
1022 int rc;
1023
1024 if (!sclp_ipl_info.has_dump)
1025 return 0; /* LDIPL DUMP is not installed */
1026 if (!diag308_set_works)
1027 return 0;
1028 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1029 if (!dump_block_fcp)
1030 return -ENOMEM;
1031 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1032 if (rc) {
1033 free_page((unsigned long)dump_block_fcp);
1034 return rc;
1035 }
1036 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1037 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1038 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1039 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1040 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1041 dump_capabilities |= DUMP_TYPE_FCP;
1042 return 0;
1043 }
1044
1045 #define SHUTDOWN_ON_PANIC_PRIO 0
1046
1047 static int shutdown_on_panic_notify(struct notifier_block *self,
1048 unsigned long event, void *data)
1049 {
1050 if (on_panic_action == SHUTDOWN_DUMP)
1051 do_dump();
1052 else if (on_panic_action == SHUTDOWN_REIPL)
1053 do_reipl();
1054 return NOTIFY_OK;
1055 }
1056
1057 static struct notifier_block shutdown_on_panic_nb = {
1058 .notifier_call = shutdown_on_panic_notify,
1059 .priority = SHUTDOWN_ON_PANIC_PRIO
1060 };
1061
1062 static int __init dump_init(void)
1063 {
1064 int rc;
1065
1066 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1067 if (!dump_kset)
1068 return -ENOMEM;
1069 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr);
1070 if (rc) {
1071 kset_unregister(dump_kset);
1072 return rc;
1073 }
1074 rc = dump_ccw_init();
1075 if (rc)
1076 return rc;
1077 rc = dump_fcp_init();
1078 if (rc)
1079 return rc;
1080 dump_set_type(DUMP_TYPE_NONE);
1081 return 0;
1082 }
1083
1084 static int __init shutdown_actions_init(void)
1085 {
1086 int rc;
1087
1088 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1089 firmware_kobj);
1090 if (!shutdown_actions_kset)
1091 return -ENOMEM;
1092 rc = sysfs_create_file(&shutdown_actions_kset->kobj, &on_panic_attr);
1093 if (rc) {
1094 kset_unregister(shutdown_actions_kset);
1095 return rc;
1096 }
1097 atomic_notifier_chain_register(&panic_notifier_list,
1098 &shutdown_on_panic_nb);
1099 return 0;
1100 }
1101
1102 static int __init s390_ipl_init(void)
1103 {
1104 int rc;
1105
1106 sclp_get_ipl_info(&sclp_ipl_info);
1107 reipl_probe();
1108 rc = ipl_init();
1109 if (rc)
1110 return rc;
1111 rc = reipl_init();
1112 if (rc)
1113 return rc;
1114 rc = dump_init();
1115 if (rc)
1116 return rc;
1117 rc = shutdown_actions_init();
1118 if (rc)
1119 return rc;
1120 return 0;
1121 }
1122
1123 __initcall(s390_ipl_init);
1124
1125 void __init ipl_save_parameters(void)
1126 {
1127 struct cio_iplinfo iplinfo;
1128 unsigned int *ipl_ptr;
1129 void *src, *dst;
1130
1131 if (cio_get_iplinfo(&iplinfo))
1132 return;
1133
1134 ipl_devno = iplinfo.devno;
1135 ipl_flags |= IPL_DEVNO_VALID;
1136 if (!iplinfo.is_qdio)
1137 return;
1138 ipl_flags |= IPL_PARMBLOCK_VALID;
1139 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1140 src = (void *)(unsigned long)*ipl_ptr;
1141 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1142 memmove(dst, src, PAGE_SIZE);
1143 *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1144 }
1145
1146 static LIST_HEAD(rcall);
1147 static DEFINE_MUTEX(rcall_mutex);
1148
1149 void register_reset_call(struct reset_call *reset)
1150 {
1151 mutex_lock(&rcall_mutex);
1152 list_add(&reset->list, &rcall);
1153 mutex_unlock(&rcall_mutex);
1154 }
1155 EXPORT_SYMBOL_GPL(register_reset_call);
1156
1157 void unregister_reset_call(struct reset_call *reset)
1158 {
1159 mutex_lock(&rcall_mutex);
1160 list_del(&reset->list);
1161 mutex_unlock(&rcall_mutex);
1162 }
1163 EXPORT_SYMBOL_GPL(unregister_reset_call);
1164
1165 static void do_reset_calls(void)
1166 {
1167 struct reset_call *reset;
1168
1169 list_for_each_entry(reset, &rcall, list)
1170 reset->fn();
1171 }
1172
1173 u32 dump_prefix_page;
1174
1175 void s390_reset_system(void)
1176 {
1177 struct _lowcore *lc;
1178
1179 lc = (struct _lowcore *)(unsigned long) store_prefix();
1180
1181 /* Stack for interrupt/machine check handler */
1182 lc->panic_stack = S390_lowcore.panic_stack;
1183
1184 /* Save prefix page address for dump case */
1185 dump_prefix_page = (u32)(unsigned long) lc;
1186
1187 /* Disable prefixing */
1188 set_prefix(0);
1189
1190 /* Disable lowcore protection */
1191 __ctl_clear_bit(0,28);
1192
1193 /* Set new machine check handler */
1194 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1195 S390_lowcore.mcck_new_psw.addr =
1196 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1197
1198 /* Set new program check handler */
1199 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1200 S390_lowcore.program_new_psw.addr =
1201 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1202
1203 do_reset_calls();
1204 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree