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-rw-r--r--arch/s390/kernel/ipl.c942
1 files changed, 942 insertions, 0 deletions
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
new file mode 100644
index 000000000000..6555cc48e28f
--- /dev/null
+++ b/arch/s390/kernel/ipl.c
@@ -0,0 +1,942 @@
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 <asm/smp.h>
17#include <asm/setup.h>
18#include <asm/cpcmd.h>
19#include <asm/cio.h>
20
21#define IPL_PARM_BLOCK_VERSION 0
22
23enum ipl_type {
24 IPL_TYPE_NONE = 1,
25 IPL_TYPE_UNKNOWN = 2,
26 IPL_TYPE_CCW = 4,
27 IPL_TYPE_FCP = 8,
28};
29
30#define IPL_NONE_STR "none"
31#define IPL_UNKNOWN_STR "unknown"
32#define IPL_CCW_STR "ccw"
33#define IPL_FCP_STR "fcp"
34
35static char *ipl_type_str(enum ipl_type type)
36{
37 switch (type) {
38 case IPL_TYPE_NONE:
39 return IPL_NONE_STR;
40 case IPL_TYPE_CCW:
41 return IPL_CCW_STR;
42 case IPL_TYPE_FCP:
43 return IPL_FCP_STR;
44 case IPL_TYPE_UNKNOWN:
45 default:
46 return IPL_UNKNOWN_STR;
47 }
48}
49
50enum ipl_method {
51 IPL_METHOD_NONE,
52 IPL_METHOD_CCW_CIO,
53 IPL_METHOD_CCW_DIAG,
54 IPL_METHOD_CCW_VM,
55 IPL_METHOD_FCP_RO_DIAG,
56 IPL_METHOD_FCP_RW_DIAG,
57 IPL_METHOD_FCP_RO_VM,
58};
59
60enum shutdown_action {
61 SHUTDOWN_REIPL,
62 SHUTDOWN_DUMP,
63 SHUTDOWN_STOP,
64};
65
66#define SHUTDOWN_REIPL_STR "reipl"
67#define SHUTDOWN_DUMP_STR "dump"
68#define SHUTDOWN_STOP_STR "stop"
69
70static char *shutdown_action_str(enum shutdown_action action)
71{
72 switch (action) {
73 case SHUTDOWN_REIPL:
74 return SHUTDOWN_REIPL_STR;
75 case SHUTDOWN_DUMP:
76 return SHUTDOWN_DUMP_STR;
77 case SHUTDOWN_STOP:
78 return SHUTDOWN_STOP_STR;
79 default:
80 BUG();
81 }
82}
83
84enum diag308_subcode {
85 DIAG308_IPL = 3,
86 DIAG308_DUMP = 4,
87 DIAG308_SET = 5,
88 DIAG308_STORE = 6,
89};
90
91enum diag308_ipl_type {
92 DIAG308_IPL_TYPE_FCP = 0,
93 DIAG308_IPL_TYPE_CCW = 2,
94};
95
96enum diag308_opt {
97 DIAG308_IPL_OPT_IPL = 0x10,
98 DIAG308_IPL_OPT_DUMP = 0x20,
99};
100
101enum diag308_rc {
102 DIAG308_RC_OK = 1,
103};
104
105static int diag308_set_works = 0;
106
107static int reipl_capabilities = IPL_TYPE_UNKNOWN;
108static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
109static enum ipl_method reipl_method = IPL_METHOD_NONE;
110static struct ipl_parameter_block *reipl_block_fcp;
111static struct ipl_parameter_block *reipl_block_ccw;
112
113static int dump_capabilities = IPL_TYPE_NONE;
114static enum ipl_type dump_type = IPL_TYPE_NONE;
115static enum ipl_method dump_method = IPL_METHOD_NONE;
116static struct ipl_parameter_block *dump_block_fcp;
117static struct ipl_parameter_block *dump_block_ccw;
118
119static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
120
121static int diag308(unsigned long subcode, void *addr)
122{
123 register unsigned long _addr asm("0") = (unsigned long)addr;
124 register unsigned long _rc asm("1") = 0;
125
126 asm volatile (
127 " diag %0,%2,0x308\n"
128 "0: \n"
129 ".section __ex_table,\"a\"\n"
130#ifdef CONFIG_64BIT
131 " .align 8\n"
132 " .quad 0b, 0b\n"
133#else
134 " .align 4\n"
135 " .long 0b, 0b\n"
136#endif
137 ".previous\n"
138 : "+d" (_addr), "+d" (_rc)
139 : "d" (subcode) : "cc", "memory" );
140
141 return _rc;
142}
143
144/* SYSFS */
145
146#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
147static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
148 char *page) \
149{ \
150 return sprintf(page, _format, _value); \
151} \
152static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
153 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
154
155#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
156static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
157 char *page) \
158{ \
159 return sprintf(page, _fmt_out, \
160 (unsigned long long) _value); \
161} \
162static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\
163 const char *buf, size_t len) \
164{ \
165 unsigned long long value; \
166 if (sscanf(buf, _fmt_in, &value) != 1) \
167 return -EINVAL; \
168 _value = value; \
169 return len; \
170} \
171static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
172 __ATTR(_name,(S_IRUGO | S_IWUSR), \
173 sys_##_prefix##_##_name##_show, \
174 sys_##_prefix##_##_name##_store);
175
176static void make_attrs_ro(struct attribute **attrs)
177{
178 while (*attrs) {
179 (*attrs)->mode = S_IRUGO;
180 attrs++;
181 }
182}
183
184/*
185 * ipl section
186 */
187
188static enum ipl_type ipl_get_type(void)
189{
190 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
191
192 if (!(ipl_flags & IPL_DEVNO_VALID))
193 return IPL_TYPE_UNKNOWN;
194 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
195 return IPL_TYPE_CCW;
196 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
197 return IPL_TYPE_UNKNOWN;
198 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
199 return IPL_TYPE_UNKNOWN;
200 return IPL_TYPE_FCP;
201}
202
203static ssize_t ipl_type_show(struct subsystem *subsys, char *page)
204{
205 return sprintf(page, "%s\n", ipl_type_str(ipl_get_type()));
206}
207
208static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
209
210static ssize_t sys_ipl_device_show(struct subsystem *subsys, char *page)
211{
212 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
213
214 switch (ipl_get_type()) {
215 case IPL_TYPE_CCW:
216 return sprintf(page, "0.0.%04x\n", ipl_devno);
217 case IPL_TYPE_FCP:
218 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
219 default:
220 return 0;
221 }
222}
223
224static struct subsys_attribute sys_ipl_device_attr =
225 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
226
227static ssize_t ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off,
228 size_t count)
229{
230 unsigned int size = IPL_PARMBLOCK_SIZE;
231
232 if (off > size)
233 return 0;
234 if (off + count > size)
235 count = size - off;
236 memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
237 return count;
238}
239
240static struct bin_attribute ipl_parameter_attr = {
241 .attr = {
242 .name = "binary_parameter",
243 .mode = S_IRUGO,
244 .owner = THIS_MODULE,
245 },
246 .size = PAGE_SIZE,
247 .read = &ipl_parameter_read,
248};
249
250static ssize_t ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off,
251 size_t count)
252{
253 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
254 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
255
256 if (off > size)
257 return 0;
258 if (off + count > size)
259 count = size - off;
260 memcpy(buf, scp_data + off, count);
261 return count;
262}
263
264static struct bin_attribute ipl_scp_data_attr = {
265 .attr = {
266 .name = "scp_data",
267 .mode = S_IRUGO,
268 .owner = THIS_MODULE,
269 },
270 .size = PAGE_SIZE,
271 .read = &ipl_scp_data_read,
272};
273
274/* FCP ipl device attributes */
275
276DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
277 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
278DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
279 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
280DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
281 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
282DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
283 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
284
285static struct attribute *ipl_fcp_attrs[] = {
286 &sys_ipl_type_attr.attr,
287 &sys_ipl_device_attr.attr,
288 &sys_ipl_fcp_wwpn_attr.attr,
289 &sys_ipl_fcp_lun_attr.attr,
290 &sys_ipl_fcp_bootprog_attr.attr,
291 &sys_ipl_fcp_br_lba_attr.attr,
292 NULL,
293};
294
295static struct attribute_group ipl_fcp_attr_group = {
296 .attrs = ipl_fcp_attrs,
297};
298
299/* CCW ipl device attributes */
300
301static struct attribute *ipl_ccw_attrs[] = {
302 &sys_ipl_type_attr.attr,
303 &sys_ipl_device_attr.attr,
304 NULL,
305};
306
307static struct attribute_group ipl_ccw_attr_group = {
308 .attrs = ipl_ccw_attrs,
309};
310
311/* UNKNOWN ipl device attributes */
312
313static struct attribute *ipl_unknown_attrs[] = {
314 &sys_ipl_type_attr.attr,
315 NULL,
316};
317
318static struct attribute_group ipl_unknown_attr_group = {
319 .attrs = ipl_unknown_attrs,
320};
321
322static decl_subsys(ipl, NULL, NULL);
323
324/*
325 * reipl section
326 */
327
328/* FCP reipl device attributes */
329
330DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
331 reipl_block_fcp->ipl_info.fcp.wwpn);
332DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
333 reipl_block_fcp->ipl_info.fcp.lun);
334DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
335 reipl_block_fcp->ipl_info.fcp.bootprog);
336DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
337 reipl_block_fcp->ipl_info.fcp.br_lba);
338DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
339 reipl_block_fcp->ipl_info.fcp.devno);
340
341static struct attribute *reipl_fcp_attrs[] = {
342 &sys_reipl_fcp_device_attr.attr,
343 &sys_reipl_fcp_wwpn_attr.attr,
344 &sys_reipl_fcp_lun_attr.attr,
345 &sys_reipl_fcp_bootprog_attr.attr,
346 &sys_reipl_fcp_br_lba_attr.attr,
347 NULL,
348};
349
350static struct attribute_group reipl_fcp_attr_group = {
351 .name = IPL_FCP_STR,
352 .attrs = reipl_fcp_attrs,
353};
354
355/* CCW reipl device attributes */
356
357DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
358 reipl_block_ccw->ipl_info.ccw.devno);
359
360static struct attribute *reipl_ccw_attrs[] = {
361 &sys_reipl_ccw_device_attr.attr,
362 NULL,
363};
364
365static struct attribute_group reipl_ccw_attr_group = {
366 .name = IPL_CCW_STR,
367 .attrs = reipl_ccw_attrs,
368};
369
370/* reipl type */
371
372static int reipl_set_type(enum ipl_type type)
373{
374 if (!(reipl_capabilities & type))
375 return -EINVAL;
376
377 switch(type) {
378 case IPL_TYPE_CCW:
379 if (MACHINE_IS_VM)
380 reipl_method = IPL_METHOD_CCW_VM;
381 else
382 reipl_method = IPL_METHOD_CCW_CIO;
383 break;
384 case IPL_TYPE_FCP:
385 if (diag308_set_works)
386 reipl_method = IPL_METHOD_FCP_RW_DIAG;
387 else if (MACHINE_IS_VM)
388 reipl_method = IPL_METHOD_FCP_RO_VM;
389 else
390 reipl_method = IPL_METHOD_FCP_RO_DIAG;
391 break;
392 default:
393 reipl_method = IPL_METHOD_NONE;
394 }
395 reipl_type = type;
396 return 0;
397}
398
399static ssize_t reipl_type_show(struct subsystem *subsys, char *page)
400{
401 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
402}
403
404static ssize_t reipl_type_store(struct subsystem *subsys, const char *buf,
405 size_t len)
406{
407 int rc = -EINVAL;
408
409 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
410 rc = reipl_set_type(IPL_TYPE_CCW);
411 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
412 rc = reipl_set_type(IPL_TYPE_FCP);
413 return (rc != 0) ? rc : len;
414}
415
416static struct subsys_attribute reipl_type_attr =
417 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
418
419static decl_subsys(reipl, NULL, NULL);
420
421/*
422 * dump section
423 */
424
425/* FCP dump device attributes */
426
427DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
428 dump_block_fcp->ipl_info.fcp.wwpn);
429DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
430 dump_block_fcp->ipl_info.fcp.lun);
431DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
432 dump_block_fcp->ipl_info.fcp.bootprog);
433DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
434 dump_block_fcp->ipl_info.fcp.br_lba);
435DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
436 dump_block_fcp->ipl_info.fcp.devno);
437
438static struct attribute *dump_fcp_attrs[] = {
439 &sys_dump_fcp_device_attr.attr,
440 &sys_dump_fcp_wwpn_attr.attr,
441 &sys_dump_fcp_lun_attr.attr,
442 &sys_dump_fcp_bootprog_attr.attr,
443 &sys_dump_fcp_br_lba_attr.attr,
444 NULL,
445};
446
447static struct attribute_group dump_fcp_attr_group = {
448 .name = IPL_FCP_STR,
449 .attrs = dump_fcp_attrs,
450};
451
452/* CCW dump device attributes */
453
454DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
455 dump_block_ccw->ipl_info.ccw.devno);
456
457static struct attribute *dump_ccw_attrs[] = {
458 &sys_dump_ccw_device_attr.attr,
459 NULL,
460};
461
462static struct attribute_group dump_ccw_attr_group = {
463 .name = IPL_CCW_STR,
464 .attrs = dump_ccw_attrs,
465};
466
467/* dump type */
468
469static int dump_set_type(enum ipl_type type)
470{
471 if (!(dump_capabilities & type))
472 return -EINVAL;
473 switch(type) {
474 case IPL_TYPE_CCW:
475 if (MACHINE_IS_VM)
476 dump_method = IPL_METHOD_CCW_VM;
477 else
478 dump_method = IPL_METHOD_CCW_CIO;
479 break;
480 case IPL_TYPE_FCP:
481 dump_method = IPL_METHOD_FCP_RW_DIAG;
482 break;
483 default:
484 dump_method = IPL_METHOD_NONE;
485 }
486 dump_type = type;
487 return 0;
488}
489
490static ssize_t dump_type_show(struct subsystem *subsys, char *page)
491{
492 return sprintf(page, "%s\n", ipl_type_str(dump_type));
493}
494
495static ssize_t dump_type_store(struct subsystem *subsys, const char *buf,
496 size_t len)
497{
498 int rc = -EINVAL;
499
500 if (strncmp(buf, IPL_NONE_STR, strlen(IPL_NONE_STR)) == 0)
501 rc = dump_set_type(IPL_TYPE_NONE);
502 else if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
503 rc = dump_set_type(IPL_TYPE_CCW);
504 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
505 rc = dump_set_type(IPL_TYPE_FCP);
506 return (rc != 0) ? rc : len;
507}
508
509static struct subsys_attribute dump_type_attr =
510 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
511
512static decl_subsys(dump, NULL, NULL);
513
514#ifdef CONFIG_SMP
515static void dump_smp_stop_all(void)
516{
517 int cpu;
518 preempt_disable();
519 for_each_online_cpu(cpu) {
520 if (cpu == smp_processor_id())
521 continue;
522 while (signal_processor(cpu, sigp_stop) == sigp_busy)
523 udelay(10);
524 }
525 preempt_enable();
526}
527#else
528#define dump_smp_stop_all() do { } while (0)
529#endif
530
531/*
532 * Shutdown actions section
533 */
534
535static decl_subsys(shutdown_actions, NULL, NULL);
536
537/* on panic */
538
539static ssize_t on_panic_show(struct subsystem *subsys, char *page)
540{
541 return sprintf(page, "%s\n", shutdown_action_str(on_panic_action));
542}
543
544static ssize_t on_panic_store(struct subsystem *subsys, const char *buf,
545 size_t len)
546{
547 if (strncmp(buf, SHUTDOWN_REIPL_STR, strlen(SHUTDOWN_REIPL_STR)) == 0)
548 on_panic_action = SHUTDOWN_REIPL;
549 else if (strncmp(buf, SHUTDOWN_DUMP_STR,
550 strlen(SHUTDOWN_DUMP_STR)) == 0)
551 on_panic_action = SHUTDOWN_DUMP;
552 else if (strncmp(buf, SHUTDOWN_STOP_STR,
553 strlen(SHUTDOWN_STOP_STR)) == 0)
554 on_panic_action = SHUTDOWN_STOP;
555 else
556 return -EINVAL;
557
558 return len;
559}
560
561static struct subsys_attribute on_panic_attr =
562 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
563
564static void print_fcp_block(struct ipl_parameter_block *fcp_block)
565{
566 printk(KERN_EMERG "wwpn: %016llx\n",
567 (unsigned long long)fcp_block->ipl_info.fcp.wwpn);
568 printk(KERN_EMERG "lun: %016llx\n",
569 (unsigned long long)fcp_block->ipl_info.fcp.lun);
570 printk(KERN_EMERG "bootprog: %lld\n",
571 (unsigned long long)fcp_block->ipl_info.fcp.bootprog);
572 printk(KERN_EMERG "br_lba: %lld\n",
573 (unsigned long long)fcp_block->ipl_info.fcp.br_lba);
574 printk(KERN_EMERG "device: %llx\n",
575 (unsigned long long)fcp_block->ipl_info.fcp.devno);
576 printk(KERN_EMERG "opt: %x\n", fcp_block->ipl_info.fcp.opt);
577}
578
579void do_reipl(void)
580{
581 struct ccw_dev_id devid;
582 static char buf[100];
583
584 switch (reipl_type) {
585 case IPL_TYPE_CCW:
586 printk(KERN_EMERG "reboot on ccw device: 0.0.%04x\n",
587 reipl_block_ccw->ipl_info.ccw.devno);
588 break;
589 case IPL_TYPE_FCP:
590 printk(KERN_EMERG "reboot on fcp device:\n");
591 print_fcp_block(reipl_block_fcp);
592 break;
593 default:
594 break;
595 }
596
597 switch (reipl_method) {
598 case IPL_METHOD_CCW_CIO:
599 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
600 devid.ssid = 0;
601 reipl_ccw_dev(&devid);
602 break;
603 case IPL_METHOD_CCW_VM:
604 sprintf(buf, "IPL %X", reipl_block_ccw->ipl_info.ccw.devno);
605 cpcmd(buf, NULL, 0, NULL);
606 break;
607 case IPL_METHOD_CCW_DIAG:
608 diag308(DIAG308_SET, reipl_block_ccw);
609 diag308(DIAG308_IPL, NULL);
610 break;
611 case IPL_METHOD_FCP_RW_DIAG:
612 diag308(DIAG308_SET, reipl_block_fcp);
613 diag308(DIAG308_IPL, NULL);
614 break;
615 case IPL_METHOD_FCP_RO_DIAG:
616 diag308(DIAG308_IPL, NULL);
617 break;
618 case IPL_METHOD_FCP_RO_VM:
619 cpcmd("IPL", NULL, 0, NULL);
620 break;
621 case IPL_METHOD_NONE:
622 default:
623 if (MACHINE_IS_VM)
624 cpcmd("IPL", NULL, 0, NULL);
625 diag308(DIAG308_IPL, NULL);
626 break;
627 }
628 panic("reipl failed!\n");
629}
630
631static void do_dump(void)
632{
633 struct ccw_dev_id devid;
634 static char buf[100];
635
636 switch (dump_type) {
637 case IPL_TYPE_CCW:
638 printk(KERN_EMERG "Automatic dump on ccw device: 0.0.%04x\n",
639 dump_block_ccw->ipl_info.ccw.devno);
640 break;
641 case IPL_TYPE_FCP:
642 printk(KERN_EMERG "Automatic dump on fcp device:\n");
643 print_fcp_block(dump_block_fcp);
644 break;
645 default:
646 return;
647 }
648
649 switch (dump_method) {
650 case IPL_METHOD_CCW_CIO:
651 dump_smp_stop_all();
652 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
653 devid.ssid = 0;
654 reipl_ccw_dev(&devid);
655 break;
656 case IPL_METHOD_CCW_VM:
657 dump_smp_stop_all();
658 sprintf(buf, "STORE STATUS");
659 cpcmd(buf, NULL, 0, NULL);
660 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
661 cpcmd(buf, NULL, 0, NULL);
662 break;
663 case IPL_METHOD_CCW_DIAG:
664 diag308(DIAG308_SET, dump_block_ccw);
665 diag308(DIAG308_DUMP, NULL);
666 break;
667 case IPL_METHOD_FCP_RW_DIAG:
668 diag308(DIAG308_SET, dump_block_fcp);
669 diag308(DIAG308_DUMP, NULL);
670 break;
671 case IPL_METHOD_NONE:
672 default:
673 return;
674 }
675 printk(KERN_EMERG "Dump failed!\n");
676}
677
678/* init functions */
679
680static int __init ipl_register_fcp_files(void)
681{
682 int rc;
683
684 rc = sysfs_create_group(&ipl_subsys.kset.kobj,
685 &ipl_fcp_attr_group);
686 if (rc)
687 goto out;
688 rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
689 &ipl_parameter_attr);
690 if (rc)
691 goto out_ipl_parm;
692 rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
693 &ipl_scp_data_attr);
694 if (!rc)
695 goto out;
696
697 sysfs_remove_bin_file(&ipl_subsys.kset.kobj, &ipl_parameter_attr);
698
699out_ipl_parm:
700 sysfs_remove_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group);
701out:
702 return rc;
703}
704
705static int __init ipl_init(void)
706{
707 int rc;
708
709 rc = firmware_register(&ipl_subsys);
710 if (rc)
711 return rc;
712 switch (ipl_get_type()) {
713 case IPL_TYPE_CCW:
714 rc = sysfs_create_group(&ipl_subsys.kset.kobj,
715 &ipl_ccw_attr_group);
716 break;
717 case IPL_TYPE_FCP:
718 rc = ipl_register_fcp_files();
719 break;
720 default:
721 rc = sysfs_create_group(&ipl_subsys.kset.kobj,
722 &ipl_unknown_attr_group);
723 break;
724 }
725 if (rc)
726 firmware_unregister(&ipl_subsys);
727 return rc;
728}
729
730static void __init reipl_probe(void)
731{
732 void *buffer;
733
734 buffer = (void *) get_zeroed_page(GFP_KERNEL);
735 if (!buffer)
736 return;
737 if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
738 diag308_set_works = 1;
739 free_page((unsigned long)buffer);
740}
741
742static int __init reipl_ccw_init(void)
743{
744 int rc;
745
746 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
747 if (!reipl_block_ccw)
748 return -ENOMEM;
749 rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_ccw_attr_group);
750 if (rc) {
751 free_page((unsigned long)reipl_block_ccw);
752 return rc;
753 }
754 reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
755 reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
756 reipl_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw);
757 reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
758 if (ipl_get_type() == IPL_TYPE_CCW)
759 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
760 reipl_capabilities |= IPL_TYPE_CCW;
761 return 0;
762}
763
764static int __init reipl_fcp_init(void)
765{
766 int rc;
767
768 if ((!diag308_set_works) && (ipl_get_type() != IPL_TYPE_FCP))
769 return 0;
770 if ((!diag308_set_works) && (ipl_get_type() == IPL_TYPE_FCP))
771 make_attrs_ro(reipl_fcp_attrs);
772
773 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
774 if (!reipl_block_fcp)
775 return -ENOMEM;
776 rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_fcp_attr_group);
777 if (rc) {
778 free_page((unsigned long)reipl_block_fcp);
779 return rc;
780 }
781 if (ipl_get_type() == IPL_TYPE_FCP) {
782 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
783 } else {
784 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
785 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
786 reipl_block_fcp->hdr.blk0_len =
787 sizeof(reipl_block_fcp->ipl_info.fcp);
788 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
789 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
790 }
791 reipl_capabilities |= IPL_TYPE_FCP;
792 return 0;
793}
794
795static int __init reipl_init(void)
796{
797 int rc;
798
799 rc = firmware_register(&reipl_subsys);
800 if (rc)
801 return rc;
802 rc = subsys_create_file(&reipl_subsys, &reipl_type_attr);
803 if (rc) {
804 firmware_unregister(&reipl_subsys);
805 return rc;
806 }
807 rc = reipl_ccw_init();
808 if (rc)
809 return rc;
810 rc = reipl_fcp_init();
811 if (rc)
812 return rc;
813 rc = reipl_set_type(ipl_get_type());
814 if (rc)
815 return rc;
816 return 0;
817}
818
819static int __init dump_ccw_init(void)
820{
821 int rc;
822
823 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
824 if (!dump_block_ccw)
825 return -ENOMEM;
826 rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_ccw_attr_group);
827 if (rc) {
828 free_page((unsigned long)dump_block_ccw);
829 return rc;
830 }
831 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
832 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
833 dump_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw);
834 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
835 dump_capabilities |= IPL_TYPE_CCW;
836 return 0;
837}
838
839extern char s390_readinfo_sccb[];
840
841static int __init dump_fcp_init(void)
842{
843 int rc;
844
845 if(!(s390_readinfo_sccb[91] & 0x2))
846 return 0; /* LDIPL DUMP is not installed */
847 if (!diag308_set_works)
848 return 0;
849 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
850 if (!dump_block_fcp)
851 return -ENOMEM;
852 rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_fcp_attr_group);
853 if (rc) {
854 free_page((unsigned long)dump_block_fcp);
855 return rc;
856 }
857 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
858 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
859 dump_block_fcp->hdr.blk0_len = sizeof(dump_block_fcp->ipl_info.fcp);
860 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
861 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
862 dump_capabilities |= IPL_TYPE_FCP;
863 return 0;
864}
865
866#define SHUTDOWN_ON_PANIC_PRIO 0
867
868static int shutdown_on_panic_notify(struct notifier_block *self,
869 unsigned long event, void *data)
870{
871 if (on_panic_action == SHUTDOWN_DUMP)
872 do_dump();
873 else if (on_panic_action == SHUTDOWN_REIPL)
874 do_reipl();
875 return NOTIFY_OK;
876}
877
878static struct notifier_block shutdown_on_panic_nb = {
879 .notifier_call = shutdown_on_panic_notify,
880 .priority = SHUTDOWN_ON_PANIC_PRIO
881};
882
883static int __init dump_init(void)
884{
885 int rc;
886
887 rc = firmware_register(&dump_subsys);
888 if (rc)
889 return rc;
890 rc = subsys_create_file(&dump_subsys, &dump_type_attr);
891 if (rc) {
892 firmware_unregister(&dump_subsys);
893 return rc;
894 }
895 rc = dump_ccw_init();
896 if (rc)
897 return rc;
898 rc = dump_fcp_init();
899 if (rc)
900 return rc;
901 dump_set_type(IPL_TYPE_NONE);
902 return 0;
903}
904
905static int __init shutdown_actions_init(void)
906{
907 int rc;
908
909 rc = firmware_register(&shutdown_actions_subsys);
910 if (rc)
911 return rc;
912 rc = subsys_create_file(&shutdown_actions_subsys, &on_panic_attr);
913 if (rc) {
914 firmware_unregister(&shutdown_actions_subsys);
915 return rc;
916 }
917 atomic_notifier_chain_register(&panic_notifier_list,
918 &shutdown_on_panic_nb);
919 return 0;
920}
921
922static int __init s390_ipl_init(void)
923{
924 int rc;
925
926 reipl_probe();
927 rc = ipl_init();
928 if (rc)
929 return rc;
930 rc = reipl_init();
931 if (rc)
932 return rc;
933 rc = dump_init();
934 if (rc)
935 return rc;
936 rc = shutdown_actions_init();
937 if (rc)
938 return rc;
939 return 0;
940}
941
942__initcall(s390_ipl_init);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 18:30:03 -0500