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[S390] ipl: Reboot from alternate device does not work when booting from file
[deliverable/linux.git] / arch / s390 / kernel / ipl.c
1 /*
2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005,2007
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 <linux/fs.h>
18 #include <asm/ipl.h>
19 #include <asm/smp.h>
20 #include <asm/setup.h>
21 #include <asm/cpcmd.h>
22 #include <asm/cio.h>
23 #include <asm/ebcdic.h>
24 #include <asm/reset.h>
25 #include <asm/sclp.h>
26 #include <asm/setup.h>
27
28 #define IPL_PARM_BLOCK_VERSION 0
29
30 #define IPL_UNKNOWN_STR "unknown"
31 #define IPL_CCW_STR "ccw"
32 #define IPL_FCP_STR "fcp"
33 #define IPL_FCP_DUMP_STR "fcp_dump"
34 #define IPL_NSS_STR "nss"
35
36 #define DUMP_CCW_STR "ccw"
37 #define DUMP_FCP_STR "fcp"
38 #define DUMP_NONE_STR "none"
39
40 /*
41 * Four shutdown trigger types are supported:
42 * - panic
43 * - halt
44 * - power off
45 * - reipl
46 */
47 #define ON_PANIC_STR "on_panic"
48 #define ON_HALT_STR "on_halt"
49 #define ON_POFF_STR "on_poff"
50 #define ON_REIPL_STR "on_reboot"
51
52 struct shutdown_action;
53 struct shutdown_trigger {
54 char *name;
55 struct shutdown_action *action;
56 };
57
58 /*
59 * Five shutdown action types are supported:
60 */
61 #define SHUTDOWN_ACTION_IPL_STR "ipl"
62 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
63 #define SHUTDOWN_ACTION_DUMP_STR "dump"
64 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
65 #define SHUTDOWN_ACTION_STOP_STR "stop"
66
67 struct shutdown_action {
68 char *name;
69 void (*fn) (struct shutdown_trigger *trigger);
70 int (*init) (void);
71 };
72
73 static char *ipl_type_str(enum ipl_type type)
74 {
75 switch (type) {
76 case IPL_TYPE_CCW:
77 return IPL_CCW_STR;
78 case IPL_TYPE_FCP:
79 return IPL_FCP_STR;
80 case IPL_TYPE_FCP_DUMP:
81 return IPL_FCP_DUMP_STR;
82 case IPL_TYPE_NSS:
83 return IPL_NSS_STR;
84 case IPL_TYPE_UNKNOWN:
85 default:
86 return IPL_UNKNOWN_STR;
87 }
88 }
89
90 enum dump_type {
91 DUMP_TYPE_NONE = 1,
92 DUMP_TYPE_CCW = 2,
93 DUMP_TYPE_FCP = 4,
94 };
95
96 static char *dump_type_str(enum dump_type type)
97 {
98 switch (type) {
99 case DUMP_TYPE_NONE:
100 return DUMP_NONE_STR;
101 case DUMP_TYPE_CCW:
102 return DUMP_CCW_STR;
103 case DUMP_TYPE_FCP:
104 return DUMP_FCP_STR;
105 default:
106 return NULL;
107 }
108 }
109
110 /*
111 * Must be in data section since the bss section
112 * is not cleared when these are accessed.
113 */
114 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
115 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
116
117 enum ipl_method {
118 REIPL_METHOD_CCW_CIO,
119 REIPL_METHOD_CCW_DIAG,
120 REIPL_METHOD_CCW_VM,
121 REIPL_METHOD_FCP_RO_DIAG,
122 REIPL_METHOD_FCP_RW_DIAG,
123 REIPL_METHOD_FCP_RO_VM,
124 REIPL_METHOD_FCP_DUMP,
125 REIPL_METHOD_NSS,
126 REIPL_METHOD_NSS_DIAG,
127 REIPL_METHOD_DEFAULT,
128 };
129
130 enum dump_method {
131 DUMP_METHOD_NONE,
132 DUMP_METHOD_CCW_CIO,
133 DUMP_METHOD_CCW_DIAG,
134 DUMP_METHOD_CCW_VM,
135 DUMP_METHOD_FCP_DIAG,
136 };
137
138 static int diag308_set_works = 0;
139
140 static struct ipl_parameter_block ipl_block;
141
142 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
143
144 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
145 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
146 static struct ipl_parameter_block *reipl_block_fcp;
147 static struct ipl_parameter_block *reipl_block_ccw;
148 static struct ipl_parameter_block *reipl_block_nss;
149
150 static int dump_capabilities = DUMP_TYPE_NONE;
151 static enum dump_type dump_type = DUMP_TYPE_NONE;
152 static enum dump_method dump_method = DUMP_METHOD_NONE;
153 static struct ipl_parameter_block *dump_block_fcp;
154 static struct ipl_parameter_block *dump_block_ccw;
155
156 static struct sclp_ipl_info sclp_ipl_info;
157
158 int diag308(unsigned long subcode, void *addr)
159 {
160 register unsigned long _addr asm("0") = (unsigned long) addr;
161 register unsigned long _rc asm("1") = 0;
162
163 asm volatile(
164 " diag %0,%2,0x308\n"
165 "0:\n"
166 EX_TABLE(0b,0b)
167 : "+d" (_addr), "+d" (_rc)
168 : "d" (subcode) : "cc", "memory");
169 return _rc;
170 }
171 EXPORT_SYMBOL_GPL(diag308);
172
173 /* SYSFS */
174
175 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
176 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
177 struct kobj_attribute *attr, \
178 char *page) \
179 { \
180 return sprintf(page, _format, _value); \
181 } \
182 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
183 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
184
185 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
186 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
187 struct kobj_attribute *attr, \
188 char *page) \
189 { \
190 return sprintf(page, _fmt_out, \
191 (unsigned long long) _value); \
192 } \
193 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
194 struct kobj_attribute *attr, \
195 const char *buf, size_t len) \
196 { \
197 unsigned long long value; \
198 if (sscanf(buf, _fmt_in, &value) != 1) \
199 return -EINVAL; \
200 _value = value; \
201 return len; \
202 } \
203 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
204 __ATTR(_name,(S_IRUGO | S_IWUSR), \
205 sys_##_prefix##_##_name##_show, \
206 sys_##_prefix##_##_name##_store);
207
208 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
209 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
210 struct kobj_attribute *attr, \
211 char *page) \
212 { \
213 return sprintf(page, _fmt_out, _value); \
214 } \
215 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
216 struct kobj_attribute *attr, \
217 const char *buf, size_t len) \
218 { \
219 strncpy(_value, buf, sizeof(_value) - 1); \
220 strstrip(_value); \
221 return len; \
222 } \
223 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
224 __ATTR(_name,(S_IRUGO | S_IWUSR), \
225 sys_##_prefix##_##_name##_show, \
226 sys_##_prefix##_##_name##_store);
227
228 static void make_attrs_ro(struct attribute **attrs)
229 {
230 while (*attrs) {
231 (*attrs)->mode = S_IRUGO;
232 attrs++;
233 }
234 }
235
236 /*
237 * ipl section
238 */
239
240 static __init enum ipl_type get_ipl_type(void)
241 {
242 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
243
244 if (ipl_flags & IPL_NSS_VALID)
245 return IPL_TYPE_NSS;
246 if (!(ipl_flags & IPL_DEVNO_VALID))
247 return IPL_TYPE_UNKNOWN;
248 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
249 return IPL_TYPE_CCW;
250 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
251 return IPL_TYPE_UNKNOWN;
252 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
253 return IPL_TYPE_UNKNOWN;
254 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
255 return IPL_TYPE_FCP_DUMP;
256 return IPL_TYPE_FCP;
257 }
258
259 struct ipl_info ipl_info;
260 EXPORT_SYMBOL_GPL(ipl_info);
261
262 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
263 char *page)
264 {
265 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
266 }
267
268 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
269
270 /* VM IPL PARM routines */
271 static void reipl_get_ascii_vmparm(char *dest,
272 const struct ipl_parameter_block *ipb)
273 {
274 int i;
275 int len = 0;
276 char has_lowercase = 0;
277
278 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
279 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
280
281 len = ipb->ipl_info.ccw.vm_parm_len;
282 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
283 /* If at least one character is lowercase, we assume mixed
284 * case; otherwise we convert everything to lowercase.
285 */
286 for (i = 0; i < len; i++)
287 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
288 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
289 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
290 has_lowercase = 1;
291 break;
292 }
293 if (!has_lowercase)
294 EBC_TOLOWER(dest, len);
295 EBCASC(dest, len);
296 }
297 dest[len] = 0;
298 }
299
300 void get_ipl_vmparm(char *dest)
301 {
302 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
303 reipl_get_ascii_vmparm(dest, &ipl_block);
304 else
305 dest[0] = 0;
306 }
307
308 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
309 struct kobj_attribute *attr, char *page)
310 {
311 char parm[DIAG308_VMPARM_SIZE + 1] = {};
312
313 get_ipl_vmparm(parm);
314 return sprintf(page, "%s\n", parm);
315 }
316
317 static struct kobj_attribute sys_ipl_vm_parm_attr =
318 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
319
320 static ssize_t sys_ipl_device_show(struct kobject *kobj,
321 struct kobj_attribute *attr, char *page)
322 {
323 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
324
325 switch (ipl_info.type) {
326 case IPL_TYPE_CCW:
327 return sprintf(page, "0.0.%04x\n", ipl_devno);
328 case IPL_TYPE_FCP:
329 case IPL_TYPE_FCP_DUMP:
330 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
331 default:
332 return 0;
333 }
334 }
335
336 static struct kobj_attribute sys_ipl_device_attr =
337 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
338
339 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
340 char *buf, loff_t off, size_t count)
341 {
342 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
343 IPL_PARMBLOCK_SIZE);
344 }
345
346 static struct bin_attribute ipl_parameter_attr = {
347 .attr = {
348 .name = "binary_parameter",
349 .mode = S_IRUGO,
350 },
351 .size = PAGE_SIZE,
352 .read = &ipl_parameter_read,
353 };
354
355 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
356 char *buf, loff_t off, size_t count)
357 {
358 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
359 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
360
361 return memory_read_from_buffer(buf, count, &off, scp_data, size);
362 }
363
364 static struct bin_attribute ipl_scp_data_attr = {
365 .attr = {
366 .name = "scp_data",
367 .mode = S_IRUGO,
368 },
369 .size = PAGE_SIZE,
370 .read = ipl_scp_data_read,
371 };
372
373 /* FCP ipl device attributes */
374
375 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
376 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
377 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
378 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
379 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
380 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
381 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
382 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
383
384 static struct attribute *ipl_fcp_attrs[] = {
385 &sys_ipl_type_attr.attr,
386 &sys_ipl_device_attr.attr,
387 &sys_ipl_fcp_wwpn_attr.attr,
388 &sys_ipl_fcp_lun_attr.attr,
389 &sys_ipl_fcp_bootprog_attr.attr,
390 &sys_ipl_fcp_br_lba_attr.attr,
391 NULL,
392 };
393
394 static struct attribute_group ipl_fcp_attr_group = {
395 .attrs = ipl_fcp_attrs,
396 };
397
398 /* CCW ipl device attributes */
399
400 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
401 struct kobj_attribute *attr, char *page)
402 {
403 char loadparm[LOADPARM_LEN + 1] = {};
404
405 if (!sclp_ipl_info.is_valid)
406 return sprintf(page, "#unknown#\n");
407 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
408 EBCASC(loadparm, LOADPARM_LEN);
409 strstrip(loadparm);
410 return sprintf(page, "%s\n", loadparm);
411 }
412
413 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
414 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
415
416 static struct attribute *ipl_ccw_attrs_vm[] = {
417 &sys_ipl_type_attr.attr,
418 &sys_ipl_device_attr.attr,
419 &sys_ipl_ccw_loadparm_attr.attr,
420 &sys_ipl_vm_parm_attr.attr,
421 NULL,
422 };
423
424 static struct attribute *ipl_ccw_attrs_lpar[] = {
425 &sys_ipl_type_attr.attr,
426 &sys_ipl_device_attr.attr,
427 &sys_ipl_ccw_loadparm_attr.attr,
428 NULL,
429 };
430
431 static struct attribute_group ipl_ccw_attr_group_vm = {
432 .attrs = ipl_ccw_attrs_vm,
433 };
434
435 static struct attribute_group ipl_ccw_attr_group_lpar = {
436 .attrs = ipl_ccw_attrs_lpar
437 };
438
439 /* NSS ipl device attributes */
440
441 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
442
443 static struct attribute *ipl_nss_attrs[] = {
444 &sys_ipl_type_attr.attr,
445 &sys_ipl_nss_name_attr.attr,
446 &sys_ipl_ccw_loadparm_attr.attr,
447 &sys_ipl_vm_parm_attr.attr,
448 NULL,
449 };
450
451 static struct attribute_group ipl_nss_attr_group = {
452 .attrs = ipl_nss_attrs,
453 };
454
455 /* UNKNOWN ipl device attributes */
456
457 static struct attribute *ipl_unknown_attrs[] = {
458 &sys_ipl_type_attr.attr,
459 NULL,
460 };
461
462 static struct attribute_group ipl_unknown_attr_group = {
463 .attrs = ipl_unknown_attrs,
464 };
465
466 static struct kset *ipl_kset;
467
468 static int __init ipl_register_fcp_files(void)
469 {
470 int rc;
471
472 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
473 if (rc)
474 goto out;
475 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
476 if (rc)
477 goto out_ipl_parm;
478 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
479 if (!rc)
480 goto out;
481
482 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
483
484 out_ipl_parm:
485 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
486 out:
487 return rc;
488 }
489
490 static void ipl_run(struct shutdown_trigger *trigger)
491 {
492 diag308(DIAG308_IPL, NULL);
493 if (MACHINE_IS_VM)
494 __cpcmd("IPL", NULL, 0, NULL);
495 else if (ipl_info.type == IPL_TYPE_CCW)
496 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
497 }
498
499 static int __init ipl_init(void)
500 {
501 int rc;
502
503 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
504 if (!ipl_kset) {
505 rc = -ENOMEM;
506 goto out;
507 }
508 switch (ipl_info.type) {
509 case IPL_TYPE_CCW:
510 if (MACHINE_IS_VM)
511 rc = sysfs_create_group(&ipl_kset->kobj,
512 &ipl_ccw_attr_group_vm);
513 else
514 rc = sysfs_create_group(&ipl_kset->kobj,
515 &ipl_ccw_attr_group_lpar);
516 break;
517 case IPL_TYPE_FCP:
518 case IPL_TYPE_FCP_DUMP:
519 rc = ipl_register_fcp_files();
520 break;
521 case IPL_TYPE_NSS:
522 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
523 break;
524 default:
525 rc = sysfs_create_group(&ipl_kset->kobj,
526 &ipl_unknown_attr_group);
527 break;
528 }
529 out:
530 if (rc)
531 panic("ipl_init failed: rc = %i\n", rc);
532
533 return 0;
534 }
535
536 static struct shutdown_action __refdata ipl_action = {
537 .name = SHUTDOWN_ACTION_IPL_STR,
538 .fn = ipl_run,
539 .init = ipl_init,
540 };
541
542 /*
543 * reipl shutdown action: Reboot Linux on shutdown.
544 */
545
546 /* VM IPL PARM attributes */
547 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
548 char *page)
549 {
550 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
551
552 reipl_get_ascii_vmparm(vmparm, ipb);
553 return sprintf(page, "%s\n", vmparm);
554 }
555
556 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
557 size_t vmparm_max,
558 const char *buf, size_t len)
559 {
560 int i, ip_len;
561
562 /* ignore trailing newline */
563 ip_len = len;
564 if ((len > 0) && (buf[len - 1] == '\n'))
565 ip_len--;
566
567 if (ip_len > vmparm_max)
568 return -EINVAL;
569
570 /* parm is used to store kernel options, check for common chars */
571 for (i = 0; i < ip_len; i++)
572 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
573 return -EINVAL;
574
575 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
576 ipb->ipl_info.ccw.vm_parm_len = ip_len;
577 if (ip_len > 0) {
578 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
579 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
580 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
581 } else {
582 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
583 }
584
585 return len;
586 }
587
588 /* NSS wrapper */
589 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
590 struct kobj_attribute *attr, char *page)
591 {
592 return reipl_generic_vmparm_show(reipl_block_nss, page);
593 }
594
595 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
596 struct kobj_attribute *attr,
597 const char *buf, size_t len)
598 {
599 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
600 }
601
602 /* CCW wrapper */
603 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
604 struct kobj_attribute *attr, char *page)
605 {
606 return reipl_generic_vmparm_show(reipl_block_ccw, page);
607 }
608
609 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
610 struct kobj_attribute *attr,
611 const char *buf, size_t len)
612 {
613 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
614 }
615
616 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
617 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
618 reipl_nss_vmparm_store);
619 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
620 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
621 reipl_ccw_vmparm_store);
622
623 /* FCP reipl device attributes */
624
625 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
626 reipl_block_fcp->ipl_info.fcp.wwpn);
627 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
628 reipl_block_fcp->ipl_info.fcp.lun);
629 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
630 reipl_block_fcp->ipl_info.fcp.bootprog);
631 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
632 reipl_block_fcp->ipl_info.fcp.br_lba);
633 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
634 reipl_block_fcp->ipl_info.fcp.devno);
635
636 static struct attribute *reipl_fcp_attrs[] = {
637 &sys_reipl_fcp_device_attr.attr,
638 &sys_reipl_fcp_wwpn_attr.attr,
639 &sys_reipl_fcp_lun_attr.attr,
640 &sys_reipl_fcp_bootprog_attr.attr,
641 &sys_reipl_fcp_br_lba_attr.attr,
642 NULL,
643 };
644
645 static struct attribute_group reipl_fcp_attr_group = {
646 .name = IPL_FCP_STR,
647 .attrs = reipl_fcp_attrs,
648 };
649
650 /* CCW reipl device attributes */
651
652 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
653 reipl_block_ccw->ipl_info.ccw.devno);
654
655 static void reipl_get_ascii_loadparm(char *loadparm,
656 struct ipl_parameter_block *ibp)
657 {
658 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
659 EBCASC(loadparm, LOADPARM_LEN);
660 loadparm[LOADPARM_LEN] = 0;
661 strstrip(loadparm);
662 }
663
664 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
665 char *page)
666 {
667 char buf[LOADPARM_LEN + 1];
668
669 reipl_get_ascii_loadparm(buf, ipb);
670 return sprintf(page, "%s\n", buf);
671 }
672
673 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
674 const char *buf, size_t len)
675 {
676 int i, lp_len;
677
678 /* ignore trailing newline */
679 lp_len = len;
680 if ((len > 0) && (buf[len - 1] == '\n'))
681 lp_len--;
682 /* loadparm can have max 8 characters and must not start with a blank */
683 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
684 return -EINVAL;
685 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
686 for (i = 0; i < lp_len; i++) {
687 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
688 (buf[i] == '.'))
689 continue;
690 return -EINVAL;
691 }
692 /* initialize loadparm with blanks */
693 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
694 /* copy and convert to ebcdic */
695 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
696 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
697 return len;
698 }
699
700 /* NSS wrapper */
701 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
702 struct kobj_attribute *attr, char *page)
703 {
704 return reipl_generic_loadparm_show(reipl_block_nss, page);
705 }
706
707 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
708 struct kobj_attribute *attr,
709 const char *buf, size_t len)
710 {
711 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
712 }
713
714 /* CCW wrapper */
715 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
716 struct kobj_attribute *attr, char *page)
717 {
718 return reipl_generic_loadparm_show(reipl_block_ccw, page);
719 }
720
721 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
722 struct kobj_attribute *attr,
723 const char *buf, size_t len)
724 {
725 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
726 }
727
728 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
729 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
730 reipl_ccw_loadparm_store);
731
732 static struct attribute *reipl_ccw_attrs_vm[] = {
733 &sys_reipl_ccw_device_attr.attr,
734 &sys_reipl_ccw_loadparm_attr.attr,
735 &sys_reipl_ccw_vmparm_attr.attr,
736 NULL,
737 };
738
739 static struct attribute *reipl_ccw_attrs_lpar[] = {
740 &sys_reipl_ccw_device_attr.attr,
741 &sys_reipl_ccw_loadparm_attr.attr,
742 NULL,
743 };
744
745 static struct attribute_group reipl_ccw_attr_group_vm = {
746 .name = IPL_CCW_STR,
747 .attrs = reipl_ccw_attrs_vm,
748 };
749
750 static struct attribute_group reipl_ccw_attr_group_lpar = {
751 .name = IPL_CCW_STR,
752 .attrs = reipl_ccw_attrs_lpar,
753 };
754
755
756 /* NSS reipl device attributes */
757 static void reipl_get_ascii_nss_name(char *dst,
758 struct ipl_parameter_block *ipb)
759 {
760 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
761 EBCASC(dst, NSS_NAME_SIZE);
762 dst[NSS_NAME_SIZE] = 0;
763 }
764
765 static ssize_t reipl_nss_name_show(struct kobject *kobj,
766 struct kobj_attribute *attr, char *page)
767 {
768 char nss_name[NSS_NAME_SIZE + 1] = {};
769
770 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
771 return sprintf(page, "%s\n", nss_name);
772 }
773
774 static ssize_t reipl_nss_name_store(struct kobject *kobj,
775 struct kobj_attribute *attr,
776 const char *buf, size_t len)
777 {
778 int nss_len;
779
780 /* ignore trailing newline */
781 nss_len = len;
782 if ((len > 0) && (buf[len - 1] == '\n'))
783 nss_len--;
784
785 if (nss_len > NSS_NAME_SIZE)
786 return -EINVAL;
787
788 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
789 if (nss_len > 0) {
790 reipl_block_nss->ipl_info.ccw.vm_flags |=
791 DIAG308_VM_FLAGS_NSS_VALID;
792 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
793 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
794 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
795 } else {
796 reipl_block_nss->ipl_info.ccw.vm_flags &=
797 ~DIAG308_VM_FLAGS_NSS_VALID;
798 }
799
800 return len;
801 }
802
803 static struct kobj_attribute sys_reipl_nss_name_attr =
804 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
805 reipl_nss_name_store);
806
807 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
808 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
809 reipl_nss_loadparm_store);
810
811 static struct attribute *reipl_nss_attrs[] = {
812 &sys_reipl_nss_name_attr.attr,
813 &sys_reipl_nss_loadparm_attr.attr,
814 &sys_reipl_nss_vmparm_attr.attr,
815 NULL,
816 };
817
818 static struct attribute_group reipl_nss_attr_group = {
819 .name = IPL_NSS_STR,
820 .attrs = reipl_nss_attrs,
821 };
822
823 /* reipl type */
824
825 static int reipl_set_type(enum ipl_type type)
826 {
827 if (!(reipl_capabilities & type))
828 return -EINVAL;
829
830 switch(type) {
831 case IPL_TYPE_CCW:
832 if (diag308_set_works)
833 reipl_method = REIPL_METHOD_CCW_DIAG;
834 else if (MACHINE_IS_VM)
835 reipl_method = REIPL_METHOD_CCW_VM;
836 else
837 reipl_method = REIPL_METHOD_CCW_CIO;
838 break;
839 case IPL_TYPE_FCP:
840 if (diag308_set_works)
841 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
842 else if (MACHINE_IS_VM)
843 reipl_method = REIPL_METHOD_FCP_RO_VM;
844 else
845 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
846 break;
847 case IPL_TYPE_FCP_DUMP:
848 reipl_method = REIPL_METHOD_FCP_DUMP;
849 break;
850 case IPL_TYPE_NSS:
851 if (diag308_set_works)
852 reipl_method = REIPL_METHOD_NSS_DIAG;
853 else
854 reipl_method = REIPL_METHOD_NSS;
855 break;
856 case IPL_TYPE_UNKNOWN:
857 reipl_method = REIPL_METHOD_DEFAULT;
858 break;
859 default:
860 BUG();
861 }
862 reipl_type = type;
863 return 0;
864 }
865
866 static ssize_t reipl_type_show(struct kobject *kobj,
867 struct kobj_attribute *attr, char *page)
868 {
869 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
870 }
871
872 static ssize_t reipl_type_store(struct kobject *kobj,
873 struct kobj_attribute *attr,
874 const char *buf, size_t len)
875 {
876 int rc = -EINVAL;
877
878 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
879 rc = reipl_set_type(IPL_TYPE_CCW);
880 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
881 rc = reipl_set_type(IPL_TYPE_FCP);
882 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
883 rc = reipl_set_type(IPL_TYPE_NSS);
884 return (rc != 0) ? rc : len;
885 }
886
887 static struct kobj_attribute reipl_type_attr =
888 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
889
890 static struct kset *reipl_kset;
891
892 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
893 const enum ipl_method m)
894 {
895 char loadparm[LOADPARM_LEN + 1] = {};
896 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
897 char nss_name[NSS_NAME_SIZE + 1] = {};
898 size_t pos = 0;
899
900 reipl_get_ascii_loadparm(loadparm, ipb);
901 reipl_get_ascii_nss_name(nss_name, ipb);
902 reipl_get_ascii_vmparm(vmparm, ipb);
903
904 switch (m) {
905 case REIPL_METHOD_CCW_VM:
906 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
907 break;
908 case REIPL_METHOD_NSS:
909 pos = sprintf(dst, "IPL %s", nss_name);
910 break;
911 default:
912 break;
913 }
914 if (strlen(loadparm) > 0)
915 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
916 if (strlen(vmparm) > 0)
917 sprintf(dst + pos, " PARM %s", vmparm);
918 }
919
920 static void reipl_run(struct shutdown_trigger *trigger)
921 {
922 struct ccw_dev_id devid;
923 static char buf[128];
924
925 switch (reipl_method) {
926 case REIPL_METHOD_CCW_CIO:
927 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
928 devid.ssid = 0;
929 reipl_ccw_dev(&devid);
930 break;
931 case REIPL_METHOD_CCW_VM:
932 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
933 __cpcmd(buf, NULL, 0, NULL);
934 break;
935 case REIPL_METHOD_CCW_DIAG:
936 diag308(DIAG308_SET, reipl_block_ccw);
937 diag308(DIAG308_IPL, NULL);
938 break;
939 case REIPL_METHOD_FCP_RW_DIAG:
940 diag308(DIAG308_SET, reipl_block_fcp);
941 diag308(DIAG308_IPL, NULL);
942 break;
943 case REIPL_METHOD_FCP_RO_DIAG:
944 diag308(DIAG308_IPL, NULL);
945 break;
946 case REIPL_METHOD_FCP_RO_VM:
947 __cpcmd("IPL", NULL, 0, NULL);
948 break;
949 case REIPL_METHOD_NSS_DIAG:
950 diag308(DIAG308_SET, reipl_block_nss);
951 diag308(DIAG308_IPL, NULL);
952 break;
953 case REIPL_METHOD_NSS:
954 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
955 __cpcmd(buf, NULL, 0, NULL);
956 break;
957 case REIPL_METHOD_DEFAULT:
958 if (MACHINE_IS_VM)
959 __cpcmd("IPL", NULL, 0, NULL);
960 diag308(DIAG308_IPL, NULL);
961 break;
962 case REIPL_METHOD_FCP_DUMP:
963 default:
964 break;
965 }
966 disabled_wait((unsigned long) __builtin_return_address(0));
967 }
968
969 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
970 {
971 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
972 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
973 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
974 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
975 }
976
977 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
978 {
979 /* LOADPARM */
980 /* check if read scp info worked and set loadparm */
981 if (sclp_ipl_info.is_valid)
982 memcpy(ipb->ipl_info.ccw.load_parm,
983 &sclp_ipl_info.loadparm, LOADPARM_LEN);
984 else
985 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
986 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
987 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
988
989 /* VM PARM */
990 if (MACHINE_IS_VM && diag308_set_works &&
991 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
992
993 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
994 ipb->ipl_info.ccw.vm_parm_len =
995 ipl_block.ipl_info.ccw.vm_parm_len;
996 memcpy(ipb->ipl_info.ccw.vm_parm,
997 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
998 }
999 }
1000
1001 static int __init reipl_nss_init(void)
1002 {
1003 int rc;
1004
1005 if (!MACHINE_IS_VM)
1006 return 0;
1007
1008 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1009 if (!reipl_block_nss)
1010 return -ENOMEM;
1011
1012 if (!diag308_set_works)
1013 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1014
1015 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1016 if (rc)
1017 return rc;
1018
1019 reipl_block_ccw_init(reipl_block_nss);
1020 if (ipl_info.type == IPL_TYPE_NSS) {
1021 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1022 ' ', NSS_NAME_SIZE);
1023 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1024 kernel_nss_name, strlen(kernel_nss_name));
1025 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1026 reipl_block_nss->ipl_info.ccw.vm_flags |=
1027 DIAG308_VM_FLAGS_NSS_VALID;
1028
1029 reipl_block_ccw_fill_parms(reipl_block_nss);
1030 }
1031
1032 reipl_capabilities |= IPL_TYPE_NSS;
1033 return 0;
1034 }
1035
1036 static int __init reipl_ccw_init(void)
1037 {
1038 int rc;
1039
1040 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1041 if (!reipl_block_ccw)
1042 return -ENOMEM;
1043
1044 if (MACHINE_IS_VM) {
1045 if (!diag308_set_works)
1046 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1047 rc = sysfs_create_group(&reipl_kset->kobj,
1048 &reipl_ccw_attr_group_vm);
1049 } else {
1050 if(!diag308_set_works)
1051 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1052 rc = sysfs_create_group(&reipl_kset->kobj,
1053 &reipl_ccw_attr_group_lpar);
1054 }
1055 if (rc)
1056 return rc;
1057
1058 reipl_block_ccw_init(reipl_block_ccw);
1059 if (ipl_info.type == IPL_TYPE_CCW) {
1060 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1061 reipl_block_ccw_fill_parms(reipl_block_ccw);
1062 }
1063
1064 reipl_capabilities |= IPL_TYPE_CCW;
1065 return 0;
1066 }
1067
1068 static int __init reipl_fcp_init(void)
1069 {
1070 int rc;
1071
1072 if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
1073 return 0;
1074 if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
1075 make_attrs_ro(reipl_fcp_attrs);
1076
1077 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1078 if (!reipl_block_fcp)
1079 return -ENOMEM;
1080 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group);
1081 if (rc) {
1082 free_page((unsigned long)reipl_block_fcp);
1083 return rc;
1084 }
1085 if (ipl_info.type == IPL_TYPE_FCP) {
1086 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1087 } else {
1088 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1089 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1090 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1091 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1092 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1093 }
1094 reipl_capabilities |= IPL_TYPE_FCP;
1095 return 0;
1096 }
1097
1098 static int __init reipl_init(void)
1099 {
1100 int rc;
1101
1102 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1103 if (!reipl_kset)
1104 return -ENOMEM;
1105 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1106 if (rc) {
1107 kset_unregister(reipl_kset);
1108 return rc;
1109 }
1110 rc = reipl_ccw_init();
1111 if (rc)
1112 return rc;
1113 rc = reipl_fcp_init();
1114 if (rc)
1115 return rc;
1116 rc = reipl_nss_init();
1117 if (rc)
1118 return rc;
1119 rc = reipl_set_type(ipl_info.type);
1120 if (rc)
1121 return rc;
1122 return 0;
1123 }
1124
1125 static struct shutdown_action __refdata reipl_action = {
1126 .name = SHUTDOWN_ACTION_REIPL_STR,
1127 .fn = reipl_run,
1128 .init = reipl_init,
1129 };
1130
1131 /*
1132 * dump shutdown action: Dump Linux on shutdown.
1133 */
1134
1135 /* FCP dump device attributes */
1136
1137 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1138 dump_block_fcp->ipl_info.fcp.wwpn);
1139 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1140 dump_block_fcp->ipl_info.fcp.lun);
1141 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1142 dump_block_fcp->ipl_info.fcp.bootprog);
1143 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1144 dump_block_fcp->ipl_info.fcp.br_lba);
1145 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1146 dump_block_fcp->ipl_info.fcp.devno);
1147
1148 static struct attribute *dump_fcp_attrs[] = {
1149 &sys_dump_fcp_device_attr.attr,
1150 &sys_dump_fcp_wwpn_attr.attr,
1151 &sys_dump_fcp_lun_attr.attr,
1152 &sys_dump_fcp_bootprog_attr.attr,
1153 &sys_dump_fcp_br_lba_attr.attr,
1154 NULL,
1155 };
1156
1157 static struct attribute_group dump_fcp_attr_group = {
1158 .name = IPL_FCP_STR,
1159 .attrs = dump_fcp_attrs,
1160 };
1161
1162 /* CCW dump device attributes */
1163
1164 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1165 dump_block_ccw->ipl_info.ccw.devno);
1166
1167 static struct attribute *dump_ccw_attrs[] = {
1168 &sys_dump_ccw_device_attr.attr,
1169 NULL,
1170 };
1171
1172 static struct attribute_group dump_ccw_attr_group = {
1173 .name = IPL_CCW_STR,
1174 .attrs = dump_ccw_attrs,
1175 };
1176
1177 /* dump type */
1178
1179 static int dump_set_type(enum dump_type type)
1180 {
1181 if (!(dump_capabilities & type))
1182 return -EINVAL;
1183 switch (type) {
1184 case DUMP_TYPE_CCW:
1185 if (diag308_set_works)
1186 dump_method = DUMP_METHOD_CCW_DIAG;
1187 else if (MACHINE_IS_VM)
1188 dump_method = DUMP_METHOD_CCW_VM;
1189 else
1190 dump_method = DUMP_METHOD_CCW_CIO;
1191 break;
1192 case DUMP_TYPE_FCP:
1193 dump_method = DUMP_METHOD_FCP_DIAG;
1194 break;
1195 default:
1196 dump_method = DUMP_METHOD_NONE;
1197 }
1198 dump_type = type;
1199 return 0;
1200 }
1201
1202 static ssize_t dump_type_show(struct kobject *kobj,
1203 struct kobj_attribute *attr, char *page)
1204 {
1205 return sprintf(page, "%s\n", dump_type_str(dump_type));
1206 }
1207
1208 static ssize_t dump_type_store(struct kobject *kobj,
1209 struct kobj_attribute *attr,
1210 const char *buf, size_t len)
1211 {
1212 int rc = -EINVAL;
1213
1214 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1215 rc = dump_set_type(DUMP_TYPE_NONE);
1216 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1217 rc = dump_set_type(DUMP_TYPE_CCW);
1218 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1219 rc = dump_set_type(DUMP_TYPE_FCP);
1220 return (rc != 0) ? rc : len;
1221 }
1222
1223 static struct kobj_attribute dump_type_attr =
1224 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1225
1226 static struct kset *dump_kset;
1227
1228 static void dump_run(struct shutdown_trigger *trigger)
1229 {
1230 struct ccw_dev_id devid;
1231 static char buf[100];
1232
1233 switch (dump_method) {
1234 case DUMP_METHOD_CCW_CIO:
1235 smp_send_stop();
1236 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1237 devid.ssid = 0;
1238 reipl_ccw_dev(&devid);
1239 break;
1240 case DUMP_METHOD_CCW_VM:
1241 smp_send_stop();
1242 sprintf(buf, "STORE STATUS");
1243 __cpcmd(buf, NULL, 0, NULL);
1244 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1245 __cpcmd(buf, NULL, 0, NULL);
1246 break;
1247 case DUMP_METHOD_CCW_DIAG:
1248 diag308(DIAG308_SET, dump_block_ccw);
1249 diag308(DIAG308_DUMP, NULL);
1250 break;
1251 case DUMP_METHOD_FCP_DIAG:
1252 diag308(DIAG308_SET, dump_block_fcp);
1253 diag308(DIAG308_DUMP, NULL);
1254 break;
1255 case DUMP_METHOD_NONE:
1256 default:
1257 return;
1258 }
1259 printk(KERN_EMERG "Dump failed!\n");
1260 }
1261
1262 static int __init dump_ccw_init(void)
1263 {
1264 int rc;
1265
1266 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1267 if (!dump_block_ccw)
1268 return -ENOMEM;
1269 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1270 if (rc) {
1271 free_page((unsigned long)dump_block_ccw);
1272 return rc;
1273 }
1274 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1275 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1276 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1277 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1278 dump_capabilities |= DUMP_TYPE_CCW;
1279 return 0;
1280 }
1281
1282 static int __init dump_fcp_init(void)
1283 {
1284 int rc;
1285
1286 if (!sclp_ipl_info.has_dump)
1287 return 0; /* LDIPL DUMP is not installed */
1288 if (!diag308_set_works)
1289 return 0;
1290 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1291 if (!dump_block_fcp)
1292 return -ENOMEM;
1293 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1294 if (rc) {
1295 free_page((unsigned long)dump_block_fcp);
1296 return rc;
1297 }
1298 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1299 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1300 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1301 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1302 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1303 dump_capabilities |= DUMP_TYPE_FCP;
1304 return 0;
1305 }
1306
1307 static int __init dump_init(void)
1308 {
1309 int rc;
1310
1311 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1312 if (!dump_kset)
1313 return -ENOMEM;
1314 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1315 if (rc) {
1316 kset_unregister(dump_kset);
1317 return rc;
1318 }
1319 rc = dump_ccw_init();
1320 if (rc)
1321 return rc;
1322 rc = dump_fcp_init();
1323 if (rc)
1324 return rc;
1325 dump_set_type(DUMP_TYPE_NONE);
1326 return 0;
1327 }
1328
1329 static struct shutdown_action __refdata dump_action = {
1330 .name = SHUTDOWN_ACTION_DUMP_STR,
1331 .fn = dump_run,
1332 .init = dump_init,
1333 };
1334
1335 /*
1336 * vmcmd shutdown action: Trigger vm command on shutdown.
1337 */
1338
1339 static char vmcmd_on_reboot[128];
1340 static char vmcmd_on_panic[128];
1341 static char vmcmd_on_halt[128];
1342 static char vmcmd_on_poff[128];
1343
1344 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1345 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1346 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1347 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1348
1349 static struct attribute *vmcmd_attrs[] = {
1350 &sys_vmcmd_on_reboot_attr.attr,
1351 &sys_vmcmd_on_panic_attr.attr,
1352 &sys_vmcmd_on_halt_attr.attr,
1353 &sys_vmcmd_on_poff_attr.attr,
1354 NULL,
1355 };
1356
1357 static struct attribute_group vmcmd_attr_group = {
1358 .attrs = vmcmd_attrs,
1359 };
1360
1361 static struct kset *vmcmd_kset;
1362
1363 static void vmcmd_run(struct shutdown_trigger *trigger)
1364 {
1365 char *cmd, *next_cmd;
1366
1367 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1368 cmd = vmcmd_on_reboot;
1369 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1370 cmd = vmcmd_on_panic;
1371 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1372 cmd = vmcmd_on_halt;
1373 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1374 cmd = vmcmd_on_poff;
1375 else
1376 return;
1377
1378 if (strlen(cmd) == 0)
1379 return;
1380 do {
1381 next_cmd = strchr(cmd, '\n');
1382 if (next_cmd) {
1383 next_cmd[0] = 0;
1384 next_cmd += 1;
1385 }
1386 __cpcmd(cmd, NULL, 0, NULL);
1387 cmd = next_cmd;
1388 } while (cmd != NULL);
1389 }
1390
1391 static int vmcmd_init(void)
1392 {
1393 if (!MACHINE_IS_VM)
1394 return -ENOTSUPP;
1395 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1396 if (!vmcmd_kset)
1397 return -ENOMEM;
1398 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1399 }
1400
1401 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1402 vmcmd_run, vmcmd_init};
1403
1404 /*
1405 * stop shutdown action: Stop Linux on shutdown.
1406 */
1407
1408 static void stop_run(struct shutdown_trigger *trigger)
1409 {
1410 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1411 disabled_wait((unsigned long) __builtin_return_address(0));
1412 else {
1413 signal_processor(smp_processor_id(), sigp_stop);
1414 for (;;);
1415 }
1416 }
1417
1418 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1419 stop_run, NULL};
1420
1421 /* action list */
1422
1423 static struct shutdown_action *shutdown_actions_list[] = {
1424 &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action};
1425 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1426
1427 /*
1428 * Trigger section
1429 */
1430
1431 static struct kset *shutdown_actions_kset;
1432
1433 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1434 size_t len)
1435 {
1436 int i;
1437 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1438 if (!shutdown_actions_list[i])
1439 continue;
1440 if (strncmp(buf, shutdown_actions_list[i]->name,
1441 strlen(shutdown_actions_list[i]->name)) == 0) {
1442 trigger->action = shutdown_actions_list[i];
1443 return len;
1444 }
1445 }
1446 return -EINVAL;
1447 }
1448
1449 /* on reipl */
1450
1451 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1452 &reipl_action};
1453
1454 static ssize_t on_reboot_show(struct kobject *kobj,
1455 struct kobj_attribute *attr, char *page)
1456 {
1457 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1458 }
1459
1460 static ssize_t on_reboot_store(struct kobject *kobj,
1461 struct kobj_attribute *attr,
1462 const char *buf, size_t len)
1463 {
1464 return set_trigger(buf, &on_reboot_trigger, len);
1465 }
1466
1467 static struct kobj_attribute on_reboot_attr =
1468 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1469
1470 static void do_machine_restart(char *__unused)
1471 {
1472 smp_send_stop();
1473 on_reboot_trigger.action->fn(&on_reboot_trigger);
1474 reipl_run(NULL);
1475 }
1476 void (*_machine_restart)(char *command) = do_machine_restart;
1477
1478 /* on panic */
1479
1480 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1481
1482 static ssize_t on_panic_show(struct kobject *kobj,
1483 struct kobj_attribute *attr, char *page)
1484 {
1485 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1486 }
1487
1488 static ssize_t on_panic_store(struct kobject *kobj,
1489 struct kobj_attribute *attr,
1490 const char *buf, size_t len)
1491 {
1492 return set_trigger(buf, &on_panic_trigger, len);
1493 }
1494
1495 static struct kobj_attribute on_panic_attr =
1496 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1497
1498 static void do_panic(void)
1499 {
1500 on_panic_trigger.action->fn(&on_panic_trigger);
1501 stop_run(&on_panic_trigger);
1502 }
1503
1504 /* on halt */
1505
1506 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1507
1508 static ssize_t on_halt_show(struct kobject *kobj,
1509 struct kobj_attribute *attr, char *page)
1510 {
1511 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1512 }
1513
1514 static ssize_t on_halt_store(struct kobject *kobj,
1515 struct kobj_attribute *attr,
1516 const char *buf, size_t len)
1517 {
1518 return set_trigger(buf, &on_halt_trigger, len);
1519 }
1520
1521 static struct kobj_attribute on_halt_attr =
1522 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1523
1524
1525 static void do_machine_halt(void)
1526 {
1527 smp_send_stop();
1528 on_halt_trigger.action->fn(&on_halt_trigger);
1529 stop_run(&on_halt_trigger);
1530 }
1531 void (*_machine_halt)(void) = do_machine_halt;
1532
1533 /* on power off */
1534
1535 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1536
1537 static ssize_t on_poff_show(struct kobject *kobj,
1538 struct kobj_attribute *attr, char *page)
1539 {
1540 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1541 }
1542
1543 static ssize_t on_poff_store(struct kobject *kobj,
1544 struct kobj_attribute *attr,
1545 const char *buf, size_t len)
1546 {
1547 return set_trigger(buf, &on_poff_trigger, len);
1548 }
1549
1550 static struct kobj_attribute on_poff_attr =
1551 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1552
1553
1554 static void do_machine_power_off(void)
1555 {
1556 smp_send_stop();
1557 on_poff_trigger.action->fn(&on_poff_trigger);
1558 stop_run(&on_poff_trigger);
1559 }
1560 void (*_machine_power_off)(void) = do_machine_power_off;
1561
1562 static void __init shutdown_triggers_init(void)
1563 {
1564 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1565 firmware_kobj);
1566 if (!shutdown_actions_kset)
1567 goto fail;
1568 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1569 &on_reboot_attr.attr))
1570 goto fail;
1571 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1572 &on_panic_attr.attr))
1573 goto fail;
1574 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1575 &on_halt_attr.attr))
1576 goto fail;
1577 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1578 &on_poff_attr.attr))
1579 goto fail;
1580
1581 return;
1582 fail:
1583 panic("shutdown_triggers_init failed\n");
1584 }
1585
1586 static void __init shutdown_actions_init(void)
1587 {
1588 int i;
1589
1590 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1591 if (!shutdown_actions_list[i]->init)
1592 continue;
1593 if (shutdown_actions_list[i]->init())
1594 shutdown_actions_list[i] = NULL;
1595 }
1596 }
1597
1598 static int __init s390_ipl_init(void)
1599 {
1600 sclp_get_ipl_info(&sclp_ipl_info);
1601 shutdown_actions_init();
1602 shutdown_triggers_init();
1603 return 0;
1604 }
1605
1606 __initcall(s390_ipl_init);
1607
1608 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1609 {
1610 int sx, dx;
1611
1612 dx = 0;
1613 for (sx = 0; src[sx] != 0; sx++) {
1614 if (src[sx] == '"')
1615 continue;
1616 dst[dx++] = src[sx];
1617 if (dx >= n)
1618 break;
1619 }
1620 }
1621
1622 static int __init vmcmd_on_reboot_setup(char *str)
1623 {
1624 if (!MACHINE_IS_VM)
1625 return 1;
1626 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1627 vmcmd_on_reboot[127] = 0;
1628 on_reboot_trigger.action = &vmcmd_action;
1629 return 1;
1630 }
1631 __setup("vmreboot=", vmcmd_on_reboot_setup);
1632
1633 static int __init vmcmd_on_panic_setup(char *str)
1634 {
1635 if (!MACHINE_IS_VM)
1636 return 1;
1637 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1638 vmcmd_on_panic[127] = 0;
1639 on_panic_trigger.action = &vmcmd_action;
1640 return 1;
1641 }
1642 __setup("vmpanic=", vmcmd_on_panic_setup);
1643
1644 static int __init vmcmd_on_halt_setup(char *str)
1645 {
1646 if (!MACHINE_IS_VM)
1647 return 1;
1648 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1649 vmcmd_on_halt[127] = 0;
1650 on_halt_trigger.action = &vmcmd_action;
1651 return 1;
1652 }
1653 __setup("vmhalt=", vmcmd_on_halt_setup);
1654
1655 static int __init vmcmd_on_poff_setup(char *str)
1656 {
1657 if (!MACHINE_IS_VM)
1658 return 1;
1659 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1660 vmcmd_on_poff[127] = 0;
1661 on_poff_trigger.action = &vmcmd_action;
1662 return 1;
1663 }
1664 __setup("vmpoff=", vmcmd_on_poff_setup);
1665
1666 static int on_panic_notify(struct notifier_block *self,
1667 unsigned long event, void *data)
1668 {
1669 do_panic();
1670 return NOTIFY_OK;
1671 }
1672
1673 static struct notifier_block on_panic_nb = {
1674 .notifier_call = on_panic_notify,
1675 .priority = 0,
1676 };
1677
1678 void __init setup_ipl(void)
1679 {
1680 ipl_info.type = get_ipl_type();
1681 switch (ipl_info.type) {
1682 case IPL_TYPE_CCW:
1683 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1684 ipl_info.data.ccw.dev_id.ssid = 0;
1685 break;
1686 case IPL_TYPE_FCP:
1687 case IPL_TYPE_FCP_DUMP:
1688 ipl_info.data.fcp.dev_id.devno =
1689 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1690 ipl_info.data.fcp.dev_id.ssid = 0;
1691 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1692 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1693 break;
1694 case IPL_TYPE_NSS:
1695 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1696 sizeof(ipl_info.data.nss.name));
1697 break;
1698 case IPL_TYPE_UNKNOWN:
1699 default:
1700 /* We have no info to copy */
1701 break;
1702 }
1703 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1704 }
1705
1706 void __init ipl_update_parameters(void)
1707 {
1708 int rc;
1709
1710 rc = diag308(DIAG308_STORE, &ipl_block);
1711 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1712 diag308_set_works = 1;
1713 }
1714
1715 void __init ipl_save_parameters(void)
1716 {
1717 struct cio_iplinfo iplinfo;
1718 unsigned int *ipl_ptr;
1719 void *src, *dst;
1720
1721 if (cio_get_iplinfo(&iplinfo))
1722 return;
1723
1724 ipl_devno = iplinfo.devno;
1725 ipl_flags |= IPL_DEVNO_VALID;
1726 if (!iplinfo.is_qdio)
1727 return;
1728 ipl_flags |= IPL_PARMBLOCK_VALID;
1729 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1730 src = (void *)(unsigned long)*ipl_ptr;
1731 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1732 memmove(dst, src, PAGE_SIZE);
1733 *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1734 }
1735
1736 static LIST_HEAD(rcall);
1737 static DEFINE_MUTEX(rcall_mutex);
1738
1739 void register_reset_call(struct reset_call *reset)
1740 {
1741 mutex_lock(&rcall_mutex);
1742 list_add(&reset->list, &rcall);
1743 mutex_unlock(&rcall_mutex);
1744 }
1745 EXPORT_SYMBOL_GPL(register_reset_call);
1746
1747 void unregister_reset_call(struct reset_call *reset)
1748 {
1749 mutex_lock(&rcall_mutex);
1750 list_del(&reset->list);
1751 mutex_unlock(&rcall_mutex);
1752 }
1753 EXPORT_SYMBOL_GPL(unregister_reset_call);
1754
1755 static void do_reset_calls(void)
1756 {
1757 struct reset_call *reset;
1758
1759 list_for_each_entry(reset, &rcall, list)
1760 reset->fn();
1761 }
1762
1763 u32 dump_prefix_page;
1764
1765 void s390_reset_system(void)
1766 {
1767 struct _lowcore *lc;
1768
1769 lc = (struct _lowcore *)(unsigned long) store_prefix();
1770
1771 /* Stack for interrupt/machine check handler */
1772 lc->panic_stack = S390_lowcore.panic_stack;
1773
1774 /* Save prefix page address for dump case */
1775 dump_prefix_page = (u32)(unsigned long) lc;
1776
1777 /* Disable prefixing */
1778 set_prefix(0);
1779
1780 /* Disable lowcore protection */
1781 __ctl_clear_bit(0,28);
1782
1783 /* Set new machine check handler */
1784 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1785 S390_lowcore.mcck_new_psw.addr =
1786 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1787
1788 /* Set new program check handler */
1789 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1790 S390_lowcore.program_new_psw.addr =
1791 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1792
1793 do_reset_calls();
1794 }
1795
Linux kernel - Deliverables
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