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mtd: nand: omap: Fix comment in platform data using wrong Kconfig symbol
[linux/fpc-iii.git] / arch / s390 / kernel / ipl.c
blob18a5d6317accd69f2e0c594bfeceed7433fb31ef
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005, 2012
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/export.h>
13 #include <linux/init.h>
14 #include <linux/device.h>
15 #include <linux/delay.h>
16 #include <linux/reboot.h>
17 #include <linux/ctype.h>
18 #include <linux/fs.h>
19 #include <linux/gfp.h>
20 #include <linux/crash_dump.h>
21 #include <linux/debug_locks.h>
22 #include <asm/diag.h>
23 #include <asm/ipl.h>
24 #include <asm/smp.h>
25 #include <asm/setup.h>
26 #include <asm/cpcmd.h>
27 #include <asm/ebcdic.h>
28 #include <asm/sclp.h>
29 #include <asm/checksum.h>
30 #include <asm/debug.h>
31 #include <asm/os_info.h>
32 #include <asm/sections.h>
33 #include <asm/boot_data.h>
34 #include "entry.h"
35
36 #define IPL_PARM_BLOCK_VERSION 0
37
38 #define IPL_UNKNOWN_STR "unknown"
39 #define IPL_CCW_STR "ccw"
40 #define IPL_FCP_STR "fcp"
41 #define IPL_FCP_DUMP_STR "fcp_dump"
42 #define IPL_NSS_STR "nss"
43
44 #define DUMP_CCW_STR "ccw"
45 #define DUMP_FCP_STR "fcp"
46 #define DUMP_NONE_STR "none"
47
48 /*
49 * Four shutdown trigger types are supported:
50 * - panic
51 * - halt
52 * - power off
53 * - reipl
54 * - restart
55 */
56 #define ON_PANIC_STR "on_panic"
57 #define ON_HALT_STR "on_halt"
58 #define ON_POFF_STR "on_poff"
59 #define ON_REIPL_STR "on_reboot"
60 #define ON_RESTART_STR "on_restart"
61
62 struct shutdown_action;
63 struct shutdown_trigger {
64 char *name;
65 struct shutdown_action *action;
66 };
67
68 /*
69 * The following shutdown action types are supported:
70 */
71 #define SHUTDOWN_ACTION_IPL_STR "ipl"
72 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
73 #define SHUTDOWN_ACTION_DUMP_STR "dump"
74 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
75 #define SHUTDOWN_ACTION_STOP_STR "stop"
76 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
77
78 struct shutdown_action {
79 char *name;
80 void (*fn) (struct shutdown_trigger *trigger);
81 int (*init) (void);
82 int init_rc;
83 };
84
85 static char *ipl_type_str(enum ipl_type type)
86 {
87 switch (type) {
88 case IPL_TYPE_CCW:
89 return IPL_CCW_STR;
90 case IPL_TYPE_FCP:
91 return IPL_FCP_STR;
92 case IPL_TYPE_FCP_DUMP:
93 return IPL_FCP_DUMP_STR;
94 case IPL_TYPE_NSS:
95 return IPL_NSS_STR;
96 case IPL_TYPE_UNKNOWN:
97 default:
98 return IPL_UNKNOWN_STR;
99 }
100 }
101
102 enum dump_type {
103 DUMP_TYPE_NONE = 1,
104 DUMP_TYPE_CCW = 2,
105 DUMP_TYPE_FCP = 4,
106 };
107
108 static char *dump_type_str(enum dump_type type)
109 {
110 switch (type) {
111 case DUMP_TYPE_NONE:
112 return DUMP_NONE_STR;
113 case DUMP_TYPE_CCW:
114 return DUMP_CCW_STR;
115 case DUMP_TYPE_FCP:
116 return DUMP_FCP_STR;
117 default:
118 return NULL;
119 }
120 }
121
122 struct ipl_parameter_block __bootdata(early_ipl_block);
123 int __bootdata(early_ipl_block_valid);
124
125 static int ipl_block_valid;
126 static struct ipl_parameter_block ipl_block;
127
128 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
129
130 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
131 static struct ipl_parameter_block *reipl_block_fcp;
132 static struct ipl_parameter_block *reipl_block_ccw;
133 static struct ipl_parameter_block *reipl_block_nss;
134 static struct ipl_parameter_block *reipl_block_actual;
135
136 static int dump_capabilities = DUMP_TYPE_NONE;
137 static enum dump_type dump_type = DUMP_TYPE_NONE;
138 static struct ipl_parameter_block *dump_block_fcp;
139 static struct ipl_parameter_block *dump_block_ccw;
140
141 static struct sclp_ipl_info sclp_ipl_info;
142
143 static inline int __diag308(unsigned long subcode, void *addr)
144 {
145 register unsigned long _addr asm("0") = (unsigned long) addr;
146 register unsigned long _rc asm("1") = 0;
147
148 asm volatile(
149 " diag %0,%2,0x308\n"
150 "0: nopr %%r7\n"
151 EX_TABLE(0b,0b)
152 : "+d" (_addr), "+d" (_rc)
153 : "d" (subcode) : "cc", "memory");
154 return _rc;
155 }
156
157 int diag308(unsigned long subcode, void *addr)
158 {
159 if (IS_ENABLED(CONFIG_KASAN))
160 __arch_local_irq_stosm(0x04); /* enable DAT */
161 diag_stat_inc(DIAG_STAT_X308);
162 return __diag308(subcode, addr);
163 }
164 EXPORT_SYMBOL_GPL(diag308);
165
166 /* SYSFS */
167
168 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
169 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
170 struct kobj_attribute *attr, \
171 char *page) \
172 { \
173 return snprintf(page, PAGE_SIZE, _format, ##args); \
174 }
175
176 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
177 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
178 struct kobj_attribute *attr, \
179 const char *buf, size_t len) \
180 { \
181 unsigned long long ssid, devno; \
182 \
183 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
184 return -EINVAL; \
185 \
186 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
187 return -EINVAL; \
188 \
189 _ipl_blk.ssid = ssid; \
190 _ipl_blk.devno = devno; \
191 return len; \
192 }
193
194 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
195 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
196 _ipl_blk.ssid, _ipl_blk.devno); \
197 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
198 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
199 __ATTR(_name, (S_IRUGO | S_IWUSR), \
200 sys_##_prefix##_##_name##_show, \
201 sys_##_prefix##_##_name##_store) \
202
203 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
204 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
205 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
206 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
207
208 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
209 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
210 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
211 struct kobj_attribute *attr, \
212 const char *buf, size_t len) \
213 { \
214 unsigned long long value; \
215 if (sscanf(buf, _fmt_in, &value) != 1) \
216 return -EINVAL; \
217 _value = value; \
218 return len; \
219 } \
220 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
221 __ATTR(_name,(S_IRUGO | S_IWUSR), \
222 sys_##_prefix##_##_name##_show, \
223 sys_##_prefix##_##_name##_store)
224
225 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
226 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
227 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
228 struct kobj_attribute *attr, \
229 const char *buf, size_t len) \
230 { \
231 strncpy(_value, buf, sizeof(_value) - 1); \
232 strim(_value); \
233 return len; \
234 } \
235 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
236 __ATTR(_name,(S_IRUGO | S_IWUSR), \
237 sys_##_prefix##_##_name##_show, \
238 sys_##_prefix##_##_name##_store)
239
240 /*
241 * ipl section
242 */
243
244 static __init enum ipl_type get_ipl_type(void)
245 {
246 if (!ipl_block_valid)
247 return IPL_TYPE_UNKNOWN;
248
249 switch (ipl_block.hdr.pbt) {
250 case DIAG308_IPL_TYPE_CCW:
251 return IPL_TYPE_CCW;
252 case DIAG308_IPL_TYPE_FCP:
253 if (ipl_block.ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
254 return IPL_TYPE_FCP_DUMP;
255 else
256 return IPL_TYPE_FCP;
257 }
258 return IPL_TYPE_UNKNOWN;
259 }
260
261 struct ipl_info ipl_info;
262 EXPORT_SYMBOL_GPL(ipl_info);
263
264 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
265 char *page)
266 {
267 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
268 }
269
270 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
271
272 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
273 struct kobj_attribute *attr, char *page)
274 {
275 char parm[DIAG308_VMPARM_SIZE + 1] = {};
276
277 if (ipl_block_valid && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
278 ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block);
279 return sprintf(page, "%s\n", parm);
280 }
281
282 static struct kobj_attribute sys_ipl_vm_parm_attr =
283 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
284
285 static ssize_t sys_ipl_device_show(struct kobject *kobj,
286 struct kobj_attribute *attr, char *page)
287 {
288 switch (ipl_info.type) {
289 case IPL_TYPE_CCW:
290 return sprintf(page, "0.%x.%04x\n", ipl_block.ipl_info.ccw.ssid,
291 ipl_block.ipl_info.ccw.devno);
292 case IPL_TYPE_FCP:
293 case IPL_TYPE_FCP_DUMP:
294 return sprintf(page, "0.0.%04x\n",
295 ipl_block.ipl_info.fcp.devno);
296 default:
297 return 0;
298 }
299 }
300
301 static struct kobj_attribute sys_ipl_device_attr =
302 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
303
304 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
305 struct bin_attribute *attr, char *buf,
306 loff_t off, size_t count)
307 {
308 return memory_read_from_buffer(buf, count, &off, &ipl_block,
309 ipl_block.hdr.len);
310 }
311 static struct bin_attribute ipl_parameter_attr =
312 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
313 PAGE_SIZE);
314
315 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
316 struct bin_attribute *attr, char *buf,
317 loff_t off, size_t count)
318 {
319 unsigned int size = ipl_block.ipl_info.fcp.scp_data_len;
320 void *scp_data = &ipl_block.ipl_info.fcp.scp_data;
321
322 return memory_read_from_buffer(buf, count, &off, scp_data, size);
323 }
324 static struct bin_attribute ipl_scp_data_attr =
325 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
326
327 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
328 &ipl_parameter_attr,
329 &ipl_scp_data_attr,
330 NULL,
331 };
332
333 /* FCP ipl device attributes */
334
335 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
336 (unsigned long long)ipl_block.ipl_info.fcp.wwpn);
337 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
338 (unsigned long long)ipl_block.ipl_info.fcp.lun);
339 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
340 (unsigned long long)ipl_block.ipl_info.fcp.bootprog);
341 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
342 (unsigned long long)ipl_block.ipl_info.fcp.br_lba);
343
344 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
345 struct kobj_attribute *attr, char *page)
346 {
347 char loadparm[LOADPARM_LEN + 1] = {};
348
349 if (!sclp_ipl_info.is_valid)
350 return sprintf(page, "#unknown#\n");
351 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
352 EBCASC(loadparm, LOADPARM_LEN);
353 strim(loadparm);
354 return sprintf(page, "%s\n", loadparm);
355 }
356
357 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
358 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
359
360 static struct attribute *ipl_fcp_attrs[] = {
361 &sys_ipl_type_attr.attr,
362 &sys_ipl_device_attr.attr,
363 &sys_ipl_fcp_wwpn_attr.attr,
364 &sys_ipl_fcp_lun_attr.attr,
365 &sys_ipl_fcp_bootprog_attr.attr,
366 &sys_ipl_fcp_br_lba_attr.attr,
367 &sys_ipl_ccw_loadparm_attr.attr,
368 NULL,
369 };
370
371 static struct attribute_group ipl_fcp_attr_group = {
372 .attrs = ipl_fcp_attrs,
373 .bin_attrs = ipl_fcp_bin_attrs,
374 };
375
376 /* CCW ipl device attributes */
377
378 static struct attribute *ipl_ccw_attrs_vm[] = {
379 &sys_ipl_type_attr.attr,
380 &sys_ipl_device_attr.attr,
381 &sys_ipl_ccw_loadparm_attr.attr,
382 &sys_ipl_vm_parm_attr.attr,
383 NULL,
384 };
385
386 static struct attribute *ipl_ccw_attrs_lpar[] = {
387 &sys_ipl_type_attr.attr,
388 &sys_ipl_device_attr.attr,
389 &sys_ipl_ccw_loadparm_attr.attr,
390 NULL,
391 };
392
393 static struct attribute_group ipl_ccw_attr_group_vm = {
394 .attrs = ipl_ccw_attrs_vm,
395 };
396
397 static struct attribute_group ipl_ccw_attr_group_lpar = {
398 .attrs = ipl_ccw_attrs_lpar
399 };
400
401 /* UNKNOWN ipl device attributes */
402
403 static struct attribute *ipl_unknown_attrs[] = {
404 &sys_ipl_type_attr.attr,
405 NULL,
406 };
407
408 static struct attribute_group ipl_unknown_attr_group = {
409 .attrs = ipl_unknown_attrs,
410 };
411
412 static struct kset *ipl_kset;
413
414 static void __ipl_run(void *unused)
415 {
416 __bpon();
417 diag308(DIAG308_LOAD_CLEAR, NULL);
418 }
419
420 static void ipl_run(struct shutdown_trigger *trigger)
421 {
422 smp_call_ipl_cpu(__ipl_run, NULL);
423 }
424
425 static int __init ipl_init(void)
426 {
427 int rc;
428
429 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
430 if (!ipl_kset) {
431 rc = -ENOMEM;
432 goto out;
433 }
434 switch (ipl_info.type) {
435 case IPL_TYPE_CCW:
436 if (MACHINE_IS_VM)
437 rc = sysfs_create_group(&ipl_kset->kobj,
438 &ipl_ccw_attr_group_vm);
439 else
440 rc = sysfs_create_group(&ipl_kset->kobj,
441 &ipl_ccw_attr_group_lpar);
442 break;
443 case IPL_TYPE_FCP:
444 case IPL_TYPE_FCP_DUMP:
445 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
446 break;
447 default:
448 rc = sysfs_create_group(&ipl_kset->kobj,
449 &ipl_unknown_attr_group);
450 break;
451 }
452 out:
453 if (rc)
454 panic("ipl_init failed: rc = %i\n", rc);
455
456 return 0;
457 }
458
459 static struct shutdown_action __refdata ipl_action = {
460 .name = SHUTDOWN_ACTION_IPL_STR,
461 .fn = ipl_run,
462 .init = ipl_init,
463 };
464
465 /*
466 * reipl shutdown action: Reboot Linux on shutdown.
467 */
468
469 /* VM IPL PARM attributes */
470 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
471 char *page)
472 {
473 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
474
475 ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
476 return sprintf(page, "%s\n", vmparm);
477 }
478
479 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
480 size_t vmparm_max,
481 const char *buf, size_t len)
482 {
483 int i, ip_len;
484
485 /* ignore trailing newline */
486 ip_len = len;
487 if ((len > 0) && (buf[len - 1] == '\n'))
488 ip_len--;
489
490 if (ip_len > vmparm_max)
491 return -EINVAL;
492
493 /* parm is used to store kernel options, check for common chars */
494 for (i = 0; i < ip_len; i++)
495 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
496 return -EINVAL;
497
498 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
499 ipb->ipl_info.ccw.vm_parm_len = ip_len;
500 if (ip_len > 0) {
501 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
502 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
503 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
504 } else {
505 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
506 }
507
508 return len;
509 }
510
511 /* NSS wrapper */
512 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
513 struct kobj_attribute *attr, char *page)
514 {
515 return reipl_generic_vmparm_show(reipl_block_nss, page);
516 }
517
518 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
519 struct kobj_attribute *attr,
520 const char *buf, size_t len)
521 {
522 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
523 }
524
525 /* CCW wrapper */
526 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
527 struct kobj_attribute *attr, char *page)
528 {
529 return reipl_generic_vmparm_show(reipl_block_ccw, page);
530 }
531
532 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
533 struct kobj_attribute *attr,
534 const char *buf, size_t len)
535 {
536 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
537 }
538
539 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
540 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
541 reipl_nss_vmparm_store);
542 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
543 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
544 reipl_ccw_vmparm_store);
545
546 /* FCP reipl device attributes */
547
548 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
549 struct bin_attribute *attr,
550 char *buf, loff_t off, size_t count)
551 {
552 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
553 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
554
555 return memory_read_from_buffer(buf, count, &off, scp_data, size);
556 }
557
558 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
559 struct bin_attribute *attr,
560 char *buf, loff_t off, size_t count)
561 {
562 size_t scpdata_len = count;
563 size_t padding;
564
565
566 if (off)
567 return -EINVAL;
568
569 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
570 if (scpdata_len % 8) {
571 padding = 8 - (scpdata_len % 8);
572 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
573 0, padding);
574 scpdata_len += padding;
575 }
576
577 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
578 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
579 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
580
581 return count;
582 }
583 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
584 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
585 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
586
587 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
588 &sys_reipl_fcp_scp_data_attr,
589 NULL,
590 };
591
592 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
593 reipl_block_fcp->ipl_info.fcp.wwpn);
594 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
595 reipl_block_fcp->ipl_info.fcp.lun);
596 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
597 reipl_block_fcp->ipl_info.fcp.bootprog);
598 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
599 reipl_block_fcp->ipl_info.fcp.br_lba);
600 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
601 reipl_block_fcp->ipl_info.fcp.devno);
602
603 static void reipl_get_ascii_loadparm(char *loadparm,
604 struct ipl_parameter_block *ibp)
605 {
606 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
607 EBCASC(loadparm, LOADPARM_LEN);
608 loadparm[LOADPARM_LEN] = 0;
609 strim(loadparm);
610 }
611
612 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
613 char *page)
614 {
615 char buf[LOADPARM_LEN + 1];
616
617 reipl_get_ascii_loadparm(buf, ipb);
618 return sprintf(page, "%s\n", buf);
619 }
620
621 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
622 const char *buf, size_t len)
623 {
624 int i, lp_len;
625
626 /* ignore trailing newline */
627 lp_len = len;
628 if ((len > 0) && (buf[len - 1] == '\n'))
629 lp_len--;
630 /* loadparm can have max 8 characters and must not start with a blank */
631 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
632 return -EINVAL;
633 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
634 for (i = 0; i < lp_len; i++) {
635 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
636 (buf[i] == '.'))
637 continue;
638 return -EINVAL;
639 }
640 /* initialize loadparm with blanks */
641 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
642 /* copy and convert to ebcdic */
643 memcpy(ipb->hdr.loadparm, buf, lp_len);
644 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
645 ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
646 return len;
647 }
648
649 /* FCP wrapper */
650 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
651 struct kobj_attribute *attr, char *page)
652 {
653 return reipl_generic_loadparm_show(reipl_block_fcp, page);
654 }
655
656 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
657 struct kobj_attribute *attr,
658 const char *buf, size_t len)
659 {
660 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
661 }
662
663 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
664 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
665 reipl_fcp_loadparm_store);
666
667 static struct attribute *reipl_fcp_attrs[] = {
668 &sys_reipl_fcp_device_attr.attr,
669 &sys_reipl_fcp_wwpn_attr.attr,
670 &sys_reipl_fcp_lun_attr.attr,
671 &sys_reipl_fcp_bootprog_attr.attr,
672 &sys_reipl_fcp_br_lba_attr.attr,
673 &sys_reipl_fcp_loadparm_attr.attr,
674 NULL,
675 };
676
677 static struct attribute_group reipl_fcp_attr_group = {
678 .attrs = reipl_fcp_attrs,
679 .bin_attrs = reipl_fcp_bin_attrs,
680 };
681
682 /* CCW reipl device attributes */
683 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
684
685 /* NSS wrapper */
686 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
687 struct kobj_attribute *attr, char *page)
688 {
689 return reipl_generic_loadparm_show(reipl_block_nss, page);
690 }
691
692 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
693 struct kobj_attribute *attr,
694 const char *buf, size_t len)
695 {
696 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
697 }
698
699 /* CCW wrapper */
700 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
701 struct kobj_attribute *attr, char *page)
702 {
703 return reipl_generic_loadparm_show(reipl_block_ccw, page);
704 }
705
706 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
707 struct kobj_attribute *attr,
708 const char *buf, size_t len)
709 {
710 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
711 }
712
713 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
714 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
715 reipl_ccw_loadparm_store);
716
717 static struct attribute *reipl_ccw_attrs_vm[] = {
718 &sys_reipl_ccw_device_attr.attr,
719 &sys_reipl_ccw_loadparm_attr.attr,
720 &sys_reipl_ccw_vmparm_attr.attr,
721 NULL,
722 };
723
724 static struct attribute *reipl_ccw_attrs_lpar[] = {
725 &sys_reipl_ccw_device_attr.attr,
726 &sys_reipl_ccw_loadparm_attr.attr,
727 NULL,
728 };
729
730 static struct attribute_group reipl_ccw_attr_group_vm = {
731 .name = IPL_CCW_STR,
732 .attrs = reipl_ccw_attrs_vm,
733 };
734
735 static struct attribute_group reipl_ccw_attr_group_lpar = {
736 .name = IPL_CCW_STR,
737 .attrs = reipl_ccw_attrs_lpar,
738 };
739
740
741 /* NSS reipl device attributes */
742 static void reipl_get_ascii_nss_name(char *dst,
743 struct ipl_parameter_block *ipb)
744 {
745 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
746 EBCASC(dst, NSS_NAME_SIZE);
747 dst[NSS_NAME_SIZE] = 0;
748 }
749
750 static ssize_t reipl_nss_name_show(struct kobject *kobj,
751 struct kobj_attribute *attr, char *page)
752 {
753 char nss_name[NSS_NAME_SIZE + 1] = {};
754
755 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
756 return sprintf(page, "%s\n", nss_name);
757 }
758
759 static ssize_t reipl_nss_name_store(struct kobject *kobj,
760 struct kobj_attribute *attr,
761 const char *buf, size_t len)
762 {
763 int nss_len;
764
765 /* ignore trailing newline */
766 nss_len = len;
767 if ((len > 0) && (buf[len - 1] == '\n'))
768 nss_len--;
769
770 if (nss_len > NSS_NAME_SIZE)
771 return -EINVAL;
772
773 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
774 if (nss_len > 0) {
775 reipl_block_nss->ipl_info.ccw.vm_flags |=
776 DIAG308_VM_FLAGS_NSS_VALID;
777 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
778 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
779 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
780 } else {
781 reipl_block_nss->ipl_info.ccw.vm_flags &=
782 ~DIAG308_VM_FLAGS_NSS_VALID;
783 }
784
785 return len;
786 }
787
788 static struct kobj_attribute sys_reipl_nss_name_attr =
789 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
790 reipl_nss_name_store);
791
792 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
793 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
794 reipl_nss_loadparm_store);
795
796 static struct attribute *reipl_nss_attrs[] = {
797 &sys_reipl_nss_name_attr.attr,
798 &sys_reipl_nss_loadparm_attr.attr,
799 &sys_reipl_nss_vmparm_attr.attr,
800 NULL,
801 };
802
803 static struct attribute_group reipl_nss_attr_group = {
804 .name = IPL_NSS_STR,
805 .attrs = reipl_nss_attrs,
806 };
807
808 void set_os_info_reipl_block(void)
809 {
810 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
811 reipl_block_actual->hdr.len);
812 }
813
814 /* reipl type */
815
816 static int reipl_set_type(enum ipl_type type)
817 {
818 if (!(reipl_capabilities & type))
819 return -EINVAL;
820
821 switch(type) {
822 case IPL_TYPE_CCW:
823 reipl_block_actual = reipl_block_ccw;
824 break;
825 case IPL_TYPE_FCP:
826 reipl_block_actual = reipl_block_fcp;
827 break;
828 case IPL_TYPE_NSS:
829 reipl_block_actual = reipl_block_nss;
830 break;
831 default:
832 break;
833 }
834 reipl_type = type;
835 return 0;
836 }
837
838 static ssize_t reipl_type_show(struct kobject *kobj,
839 struct kobj_attribute *attr, char *page)
840 {
841 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
842 }
843
844 static ssize_t reipl_type_store(struct kobject *kobj,
845 struct kobj_attribute *attr,
846 const char *buf, size_t len)
847 {
848 int rc = -EINVAL;
849
850 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
851 rc = reipl_set_type(IPL_TYPE_CCW);
852 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
853 rc = reipl_set_type(IPL_TYPE_FCP);
854 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
855 rc = reipl_set_type(IPL_TYPE_NSS);
856 return (rc != 0) ? rc : len;
857 }
858
859 static struct kobj_attribute reipl_type_attr =
860 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
861
862 static struct kset *reipl_kset;
863 static struct kset *reipl_fcp_kset;
864
865 static void __reipl_run(void *unused)
866 {
867 switch (reipl_type) {
868 case IPL_TYPE_CCW:
869 diag308(DIAG308_SET, reipl_block_ccw);
870 diag308(DIAG308_LOAD_CLEAR, NULL);
871 break;
872 case IPL_TYPE_FCP:
873 diag308(DIAG308_SET, reipl_block_fcp);
874 diag308(DIAG308_LOAD_CLEAR, NULL);
875 break;
876 case IPL_TYPE_NSS:
877 diag308(DIAG308_SET, reipl_block_nss);
878 diag308(DIAG308_LOAD_CLEAR, NULL);
879 break;
880 case IPL_TYPE_UNKNOWN:
881 diag308(DIAG308_LOAD_CLEAR, NULL);
882 break;
883 case IPL_TYPE_FCP_DUMP:
884 break;
885 }
886 disabled_wait((unsigned long) __builtin_return_address(0));
887 }
888
889 static void reipl_run(struct shutdown_trigger *trigger)
890 {
891 smp_call_ipl_cpu(__reipl_run, NULL);
892 }
893
894 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
895 {
896 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
897 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
898 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
899 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
900 }
901
902 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
903 {
904 /* LOADPARM */
905 /* check if read scp info worked and set loadparm */
906 if (sclp_ipl_info.is_valid)
907 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
908 else
909 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
910 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
911 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
912
913 /* VM PARM */
914 if (MACHINE_IS_VM && ipl_block_valid &&
915 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
916
917 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
918 ipb->ipl_info.ccw.vm_parm_len =
919 ipl_block.ipl_info.ccw.vm_parm_len;
920 memcpy(ipb->ipl_info.ccw.vm_parm,
921 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
922 }
923 }
924
925 static int __init reipl_nss_init(void)
926 {
927 int rc;
928
929 if (!MACHINE_IS_VM)
930 return 0;
931
932 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
933 if (!reipl_block_nss)
934 return -ENOMEM;
935
936 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
937 if (rc)
938 return rc;
939
940 reipl_block_ccw_init(reipl_block_nss);
941 reipl_capabilities |= IPL_TYPE_NSS;
942 return 0;
943 }
944
945 static int __init reipl_ccw_init(void)
946 {
947 int rc;
948
949 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
950 if (!reipl_block_ccw)
951 return -ENOMEM;
952
953 rc = sysfs_create_group(&reipl_kset->kobj,
954 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
955 : &reipl_ccw_attr_group_lpar);
956 if (rc)
957 return rc;
958
959 reipl_block_ccw_init(reipl_block_ccw);
960 if (ipl_info.type == IPL_TYPE_CCW) {
961 reipl_block_ccw->ipl_info.ccw.ssid = ipl_block.ipl_info.ccw.ssid;
962 reipl_block_ccw->ipl_info.ccw.devno = ipl_block.ipl_info.ccw.devno;
963 reipl_block_ccw_fill_parms(reipl_block_ccw);
964 }
965
966 reipl_capabilities |= IPL_TYPE_CCW;
967 return 0;
968 }
969
970 static int __init reipl_fcp_init(void)
971 {
972 int rc;
973
974 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
975 if (!reipl_block_fcp)
976 return -ENOMEM;
977
978 /* sysfs: create fcp kset for mixing attr group and bin attrs */
979 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
980 &reipl_kset->kobj);
981 if (!reipl_fcp_kset) {
982 free_page((unsigned long) reipl_block_fcp);
983 return -ENOMEM;
984 }
985
986 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
987 if (rc) {
988 kset_unregister(reipl_fcp_kset);
989 free_page((unsigned long) reipl_block_fcp);
990 return rc;
991 }
992
993 if (ipl_info.type == IPL_TYPE_FCP) {
994 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
995 /*
996 * Fix loadparm: There are systems where the (SCSI) LOADPARM
997 * is invalid in the SCSI IPL parameter block, so take it
998 * always from sclp_ipl_info.
999 */
1000 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1001 LOADPARM_LEN);
1002 } else {
1003 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1004 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1005 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1006 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1007 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1008 }
1009 reipl_capabilities |= IPL_TYPE_FCP;
1010 return 0;
1011 }
1012
1013 static int __init reipl_type_init(void)
1014 {
1015 enum ipl_type reipl_type = ipl_info.type;
1016 struct ipl_parameter_block *reipl_block;
1017 unsigned long size;
1018
1019 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1020 if (!reipl_block)
1021 goto out;
1022 /*
1023 * If we have an OS info reipl block, this will be used
1024 */
1025 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1026 memcpy(reipl_block_fcp, reipl_block, size);
1027 reipl_type = IPL_TYPE_FCP;
1028 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1029 memcpy(reipl_block_ccw, reipl_block, size);
1030 reipl_type = IPL_TYPE_CCW;
1031 }
1032 out:
1033 return reipl_set_type(reipl_type);
1034 }
1035
1036 static int __init reipl_init(void)
1037 {
1038 int rc;
1039
1040 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1041 if (!reipl_kset)
1042 return -ENOMEM;
1043 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1044 if (rc) {
1045 kset_unregister(reipl_kset);
1046 return rc;
1047 }
1048 rc = reipl_ccw_init();
1049 if (rc)
1050 return rc;
1051 rc = reipl_fcp_init();
1052 if (rc)
1053 return rc;
1054 rc = reipl_nss_init();
1055 if (rc)
1056 return rc;
1057 return reipl_type_init();
1058 }
1059
1060 static struct shutdown_action __refdata reipl_action = {
1061 .name = SHUTDOWN_ACTION_REIPL_STR,
1062 .fn = reipl_run,
1063 .init = reipl_init,
1064 };
1065
1066 /*
1067 * dump shutdown action: Dump Linux on shutdown.
1068 */
1069
1070 /* FCP dump device attributes */
1071
1072 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1073 dump_block_fcp->ipl_info.fcp.wwpn);
1074 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1075 dump_block_fcp->ipl_info.fcp.lun);
1076 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1077 dump_block_fcp->ipl_info.fcp.bootprog);
1078 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1079 dump_block_fcp->ipl_info.fcp.br_lba);
1080 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1081 dump_block_fcp->ipl_info.fcp.devno);
1082
1083 static struct attribute *dump_fcp_attrs[] = {
1084 &sys_dump_fcp_device_attr.attr,
1085 &sys_dump_fcp_wwpn_attr.attr,
1086 &sys_dump_fcp_lun_attr.attr,
1087 &sys_dump_fcp_bootprog_attr.attr,
1088 &sys_dump_fcp_br_lba_attr.attr,
1089 NULL,
1090 };
1091
1092 static struct attribute_group dump_fcp_attr_group = {
1093 .name = IPL_FCP_STR,
1094 .attrs = dump_fcp_attrs,
1095 };
1096
1097 /* CCW dump device attributes */
1098 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1099
1100 static struct attribute *dump_ccw_attrs[] = {
1101 &sys_dump_ccw_device_attr.attr,
1102 NULL,
1103 };
1104
1105 static struct attribute_group dump_ccw_attr_group = {
1106 .name = IPL_CCW_STR,
1107 .attrs = dump_ccw_attrs,
1108 };
1109
1110 /* dump type */
1111
1112 static int dump_set_type(enum dump_type type)
1113 {
1114 if (!(dump_capabilities & type))
1115 return -EINVAL;
1116 dump_type = type;
1117 return 0;
1118 }
1119
1120 static ssize_t dump_type_show(struct kobject *kobj,
1121 struct kobj_attribute *attr, char *page)
1122 {
1123 return sprintf(page, "%s\n", dump_type_str(dump_type));
1124 }
1125
1126 static ssize_t dump_type_store(struct kobject *kobj,
1127 struct kobj_attribute *attr,
1128 const char *buf, size_t len)
1129 {
1130 int rc = -EINVAL;
1131
1132 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1133 rc = dump_set_type(DUMP_TYPE_NONE);
1134 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1135 rc = dump_set_type(DUMP_TYPE_CCW);
1136 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1137 rc = dump_set_type(DUMP_TYPE_FCP);
1138 return (rc != 0) ? rc : len;
1139 }
1140
1141 static struct kobj_attribute dump_type_attr =
1142 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1143
1144 static struct kset *dump_kset;
1145
1146 static void diag308_dump(void *dump_block)
1147 {
1148 diag308(DIAG308_SET, dump_block);
1149 while (1) {
1150 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1151 break;
1152 udelay_simple(USEC_PER_SEC);
1153 }
1154 }
1155
1156 static void __dump_run(void *unused)
1157 {
1158 switch (dump_type) {
1159 case DUMP_TYPE_CCW:
1160 diag308_dump(dump_block_ccw);
1161 break;
1162 case DUMP_TYPE_FCP:
1163 diag308_dump(dump_block_fcp);
1164 break;
1165 default:
1166 break;
1167 }
1168 }
1169
1170 static void dump_run(struct shutdown_trigger *trigger)
1171 {
1172 if (dump_type == DUMP_TYPE_NONE)
1173 return;
1174 smp_send_stop();
1175 smp_call_ipl_cpu(__dump_run, NULL);
1176 }
1177
1178 static int __init dump_ccw_init(void)
1179 {
1180 int rc;
1181
1182 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1183 if (!dump_block_ccw)
1184 return -ENOMEM;
1185 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1186 if (rc) {
1187 free_page((unsigned long)dump_block_ccw);
1188 return rc;
1189 }
1190 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1191 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1192 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1193 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1194 dump_capabilities |= DUMP_TYPE_CCW;
1195 return 0;
1196 }
1197
1198 static int __init dump_fcp_init(void)
1199 {
1200 int rc;
1201
1202 if (!sclp_ipl_info.has_dump)
1203 return 0; /* LDIPL DUMP is not installed */
1204 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1205 if (!dump_block_fcp)
1206 return -ENOMEM;
1207 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1208 if (rc) {
1209 free_page((unsigned long)dump_block_fcp);
1210 return rc;
1211 }
1212 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1213 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1214 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1215 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1216 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1217 dump_capabilities |= DUMP_TYPE_FCP;
1218 return 0;
1219 }
1220
1221 static int __init dump_init(void)
1222 {
1223 int rc;
1224
1225 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1226 if (!dump_kset)
1227 return -ENOMEM;
1228 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1229 if (rc) {
1230 kset_unregister(dump_kset);
1231 return rc;
1232 }
1233 rc = dump_ccw_init();
1234 if (rc)
1235 return rc;
1236 rc = dump_fcp_init();
1237 if (rc)
1238 return rc;
1239 dump_set_type(DUMP_TYPE_NONE);
1240 return 0;
1241 }
1242
1243 static struct shutdown_action __refdata dump_action = {
1244 .name = SHUTDOWN_ACTION_DUMP_STR,
1245 .fn = dump_run,
1246 .init = dump_init,
1247 };
1248
1249 static void dump_reipl_run(struct shutdown_trigger *trigger)
1250 {
1251 unsigned long ipib = (unsigned long) reipl_block_actual;
1252 unsigned int csum;
1253
1254 csum = (__force unsigned int)
1255 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1256 mem_assign_absolute(S390_lowcore.ipib, ipib);
1257 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1258 dump_run(trigger);
1259 }
1260
1261 static struct shutdown_action __refdata dump_reipl_action = {
1262 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1263 .fn = dump_reipl_run,
1264 };
1265
1266 /*
1267 * vmcmd shutdown action: Trigger vm command on shutdown.
1268 */
1269
1270 static char vmcmd_on_reboot[128];
1271 static char vmcmd_on_panic[128];
1272 static char vmcmd_on_halt[128];
1273 static char vmcmd_on_poff[128];
1274 static char vmcmd_on_restart[128];
1275
1276 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1277 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1278 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1279 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1280 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1281
1282 static struct attribute *vmcmd_attrs[] = {
1283 &sys_vmcmd_on_reboot_attr.attr,
1284 &sys_vmcmd_on_panic_attr.attr,
1285 &sys_vmcmd_on_halt_attr.attr,
1286 &sys_vmcmd_on_poff_attr.attr,
1287 &sys_vmcmd_on_restart_attr.attr,
1288 NULL,
1289 };
1290
1291 static struct attribute_group vmcmd_attr_group = {
1292 .attrs = vmcmd_attrs,
1293 };
1294
1295 static struct kset *vmcmd_kset;
1296
1297 static void vmcmd_run(struct shutdown_trigger *trigger)
1298 {
1299 char *cmd;
1300
1301 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1302 cmd = vmcmd_on_reboot;
1303 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1304 cmd = vmcmd_on_panic;
1305 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1306 cmd = vmcmd_on_halt;
1307 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1308 cmd = vmcmd_on_poff;
1309 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1310 cmd = vmcmd_on_restart;
1311 else
1312 return;
1313
1314 if (strlen(cmd) == 0)
1315 return;
1316 __cpcmd(cmd, NULL, 0, NULL);
1317 }
1318
1319 static int vmcmd_init(void)
1320 {
1321 if (!MACHINE_IS_VM)
1322 return -EOPNOTSUPP;
1323 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1324 if (!vmcmd_kset)
1325 return -ENOMEM;
1326 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1327 }
1328
1329 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1330 vmcmd_run, vmcmd_init};
1331
1332 /*
1333 * stop shutdown action: Stop Linux on shutdown.
1334 */
1335
1336 static void stop_run(struct shutdown_trigger *trigger)
1337 {
1338 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1339 strcmp(trigger->name, ON_RESTART_STR) == 0)
1340 disabled_wait((unsigned long) __builtin_return_address(0));
1341 smp_stop_cpu();
1342 }
1343
1344 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1345 stop_run, NULL};
1346
1347 /* action list */
1348
1349 static struct shutdown_action *shutdown_actions_list[] = {
1350 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1351 &vmcmd_action, &stop_action};
1352 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1353
1354 /*
1355 * Trigger section
1356 */
1357
1358 static struct kset *shutdown_actions_kset;
1359
1360 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1361 size_t len)
1362 {
1363 int i;
1364
1365 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1366 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1367 if (shutdown_actions_list[i]->init_rc) {
1368 return shutdown_actions_list[i]->init_rc;
1369 } else {
1370 trigger->action = shutdown_actions_list[i];
1371 return len;
1372 }
1373 }
1374 }
1375 return -EINVAL;
1376 }
1377
1378 /* on reipl */
1379
1380 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1381 &reipl_action};
1382
1383 static ssize_t on_reboot_show(struct kobject *kobj,
1384 struct kobj_attribute *attr, char *page)
1385 {
1386 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1387 }
1388
1389 static ssize_t on_reboot_store(struct kobject *kobj,
1390 struct kobj_attribute *attr,
1391 const char *buf, size_t len)
1392 {
1393 return set_trigger(buf, &on_reboot_trigger, len);
1394 }
1395 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1396
1397 static void do_machine_restart(char *__unused)
1398 {
1399 smp_send_stop();
1400 on_reboot_trigger.action->fn(&on_reboot_trigger);
1401 reipl_run(NULL);
1402 }
1403 void (*_machine_restart)(char *command) = do_machine_restart;
1404
1405 /* on panic */
1406
1407 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1408
1409 static ssize_t on_panic_show(struct kobject *kobj,
1410 struct kobj_attribute *attr, char *page)
1411 {
1412 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1413 }
1414
1415 static ssize_t on_panic_store(struct kobject *kobj,
1416 struct kobj_attribute *attr,
1417 const char *buf, size_t len)
1418 {
1419 return set_trigger(buf, &on_panic_trigger, len);
1420 }
1421 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1422
1423 static void do_panic(void)
1424 {
1425 lgr_info_log();
1426 on_panic_trigger.action->fn(&on_panic_trigger);
1427 stop_run(&on_panic_trigger);
1428 }
1429
1430 /* on restart */
1431
1432 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1433 &stop_action};
1434
1435 static ssize_t on_restart_show(struct kobject *kobj,
1436 struct kobj_attribute *attr, char *page)
1437 {
1438 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1439 }
1440
1441 static ssize_t on_restart_store(struct kobject *kobj,
1442 struct kobj_attribute *attr,
1443 const char *buf, size_t len)
1444 {
1445 return set_trigger(buf, &on_restart_trigger, len);
1446 }
1447 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1448
1449 static void __do_restart(void *ignore)
1450 {
1451 __arch_local_irq_stosm(0x04); /* enable DAT */
1452 smp_send_stop();
1453 #ifdef CONFIG_CRASH_DUMP
1454 crash_kexec(NULL);
1455 #endif
1456 on_restart_trigger.action->fn(&on_restart_trigger);
1457 stop_run(&on_restart_trigger);
1458 }
1459
1460 void do_restart(void)
1461 {
1462 tracing_off();
1463 debug_locks_off();
1464 lgr_info_log();
1465 smp_call_online_cpu(__do_restart, NULL);
1466 }
1467
1468 /* on halt */
1469
1470 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1471
1472 static ssize_t on_halt_show(struct kobject *kobj,
1473 struct kobj_attribute *attr, char *page)
1474 {
1475 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1476 }
1477
1478 static ssize_t on_halt_store(struct kobject *kobj,
1479 struct kobj_attribute *attr,
1480 const char *buf, size_t len)
1481 {
1482 return set_trigger(buf, &on_halt_trigger, len);
1483 }
1484 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1485
1486 static void do_machine_halt(void)
1487 {
1488 smp_send_stop();
1489 on_halt_trigger.action->fn(&on_halt_trigger);
1490 stop_run(&on_halt_trigger);
1491 }
1492 void (*_machine_halt)(void) = do_machine_halt;
1493
1494 /* on power off */
1495
1496 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1497
1498 static ssize_t on_poff_show(struct kobject *kobj,
1499 struct kobj_attribute *attr, char *page)
1500 {
1501 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1502 }
1503
1504 static ssize_t on_poff_store(struct kobject *kobj,
1505 struct kobj_attribute *attr,
1506 const char *buf, size_t len)
1507 {
1508 return set_trigger(buf, &on_poff_trigger, len);
1509 }
1510 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1511
1512 static void do_machine_power_off(void)
1513 {
1514 smp_send_stop();
1515 on_poff_trigger.action->fn(&on_poff_trigger);
1516 stop_run(&on_poff_trigger);
1517 }
1518 void (*_machine_power_off)(void) = do_machine_power_off;
1519
1520 static struct attribute *shutdown_action_attrs[] = {
1521 &on_restart_attr.attr,
1522 &on_reboot_attr.attr,
1523 &on_panic_attr.attr,
1524 &on_halt_attr.attr,
1525 &on_poff_attr.attr,
1526 NULL,
1527 };
1528
1529 static struct attribute_group shutdown_action_attr_group = {
1530 .attrs = shutdown_action_attrs,
1531 };
1532
1533 static void __init shutdown_triggers_init(void)
1534 {
1535 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1536 firmware_kobj);
1537 if (!shutdown_actions_kset)
1538 goto fail;
1539 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1540 &shutdown_action_attr_group))
1541 goto fail;
1542 return;
1543 fail:
1544 panic("shutdown_triggers_init failed\n");
1545 }
1546
1547 static void __init shutdown_actions_init(void)
1548 {
1549 int i;
1550
1551 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1552 if (!shutdown_actions_list[i]->init)
1553 continue;
1554 shutdown_actions_list[i]->init_rc =
1555 shutdown_actions_list[i]->init();
1556 }
1557 }
1558
1559 static int __init s390_ipl_init(void)
1560 {
1561 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1562
1563 sclp_early_get_ipl_info(&sclp_ipl_info);
1564 /*
1565 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1566 * returned by read SCP info is invalid (contains EBCDIC blanks)
1567 * when the system has been booted via diag308. In that case we use
1568 * the value from diag308, if available.
1569 *
1570 * There are also systems where diag308 store does not work in
1571 * case the system is booted from HMC. Fortunately in this case
1572 * READ SCP info provides the correct value.
1573 */
1574 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
1575 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, LOADPARM_LEN);
1576 shutdown_actions_init();
1577 shutdown_triggers_init();
1578 return 0;
1579 }
1580
1581 __initcall(s390_ipl_init);
1582
1583 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1584 {
1585 int sx, dx;
1586
1587 dx = 0;
1588 for (sx = 0; src[sx] != 0; sx++) {
1589 if (src[sx] == '"')
1590 continue;
1591 dst[dx++] = src[sx];
1592 if (dx >= n)
1593 break;
1594 }
1595 }
1596
1597 static int __init vmcmd_on_reboot_setup(char *str)
1598 {
1599 if (!MACHINE_IS_VM)
1600 return 1;
1601 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1602 vmcmd_on_reboot[127] = 0;
1603 on_reboot_trigger.action = &vmcmd_action;
1604 return 1;
1605 }
1606 __setup("vmreboot=", vmcmd_on_reboot_setup);
1607
1608 static int __init vmcmd_on_panic_setup(char *str)
1609 {
1610 if (!MACHINE_IS_VM)
1611 return 1;
1612 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1613 vmcmd_on_panic[127] = 0;
1614 on_panic_trigger.action = &vmcmd_action;
1615 return 1;
1616 }
1617 __setup("vmpanic=", vmcmd_on_panic_setup);
1618
1619 static int __init vmcmd_on_halt_setup(char *str)
1620 {
1621 if (!MACHINE_IS_VM)
1622 return 1;
1623 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1624 vmcmd_on_halt[127] = 0;
1625 on_halt_trigger.action = &vmcmd_action;
1626 return 1;
1627 }
1628 __setup("vmhalt=", vmcmd_on_halt_setup);
1629
1630 static int __init vmcmd_on_poff_setup(char *str)
1631 {
1632 if (!MACHINE_IS_VM)
1633 return 1;
1634 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1635 vmcmd_on_poff[127] = 0;
1636 on_poff_trigger.action = &vmcmd_action;
1637 return 1;
1638 }
1639 __setup("vmpoff=", vmcmd_on_poff_setup);
1640
1641 static int on_panic_notify(struct notifier_block *self,
1642 unsigned long event, void *data)
1643 {
1644 do_panic();
1645 return NOTIFY_OK;
1646 }
1647
1648 static struct notifier_block on_panic_nb = {
1649 .notifier_call = on_panic_notify,
1650 .priority = INT_MIN,
1651 };
1652
1653 void __init setup_ipl(void)
1654 {
1655 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
1656
1657 ipl_info.type = get_ipl_type();
1658 switch (ipl_info.type) {
1659 case IPL_TYPE_CCW:
1660 ipl_info.data.ccw.dev_id.ssid = ipl_block.ipl_info.ccw.ssid;
1661 ipl_info.data.ccw.dev_id.devno = ipl_block.ipl_info.ccw.devno;
1662 break;
1663 case IPL_TYPE_FCP:
1664 case IPL_TYPE_FCP_DUMP:
1665 ipl_info.data.fcp.dev_id.ssid = 0;
1666 ipl_info.data.fcp.dev_id.devno = ipl_block.ipl_info.fcp.devno;
1667 ipl_info.data.fcp.wwpn = ipl_block.ipl_info.fcp.wwpn;
1668 ipl_info.data.fcp.lun = ipl_block.ipl_info.fcp.lun;
1669 break;
1670 case IPL_TYPE_NSS:
1671 case IPL_TYPE_UNKNOWN:
1672 /* We have no info to copy */
1673 break;
1674 }
1675 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1676 }
1677
1678 void __init ipl_store_parameters(void)
1679 {
1680 if (early_ipl_block_valid) {
1681 memcpy(&ipl_block, &early_ipl_block, sizeof(ipl_block));
1682 ipl_block_valid = 1;
1683 }
1684 }
1685
1686 void s390_reset_system(void)
1687 {
1688 /* Disable prefixing */
1689 set_prefix(0);
1690
1691 /* Disable lowcore protection */
1692 __ctl_clear_bit(0, 28);
1693 diag308_reset();
1694 }
Linux with added FPC-III support