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[S390] Cleanup struct _lowcore usage and defines.
[net-next-2.6.git] / arch / s390 / kernel / ipl.c
CommitLineData
ff6b8ea6
MH		 1/*
2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
4 *
99ca4e58 5 * Copyright IBM Corp. 2005,2007
ff6b8ea6
MH		 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>
03a4d208 16#include <linux/ctype.h>
0788fea4 17#include <linux/fs.h>
46b05d26 18#include <asm/ipl.h>
ff6b8ea6
MH		 19#include <asm/smp.h>
20#include <asm/setup.h>
21#include <asm/cpcmd.h>
22#include <asm/cio.h>
03a4d208 23#include <asm/ebcdic.h>
15e9b586 24#include <asm/reset.h>
ab14de6c 25#include <asm/sclp.h>
3bd5f3ef 26#include <asm/sigp.h>
159d1ff8 27#include <asm/checksum.h>
ff6b8ea6
MH		 28
29#define IPL_PARM_BLOCK_VERSION 0
03a4d208 30
411ed322
MH		 31#define IPL_UNKNOWN_STR "unknown"
32#define IPL_CCW_STR "ccw"
33#define IPL_FCP_STR "fcp"
34#define IPL_FCP_DUMP_STR "fcp_dump"
35#define IPL_NSS_STR "nss"
615b04b3 36
99ca4e58
MH		 37#define DUMP_CCW_STR "ccw"
38#define DUMP_FCP_STR "fcp"
39#define DUMP_NONE_STR "none"
40
41/*
42 * Four shutdown trigger types are supported:
43 * - panic
44 * - halt
45 * - power off
46 * - reipl
47 */
48#define ON_PANIC_STR "on_panic"
49#define ON_HALT_STR "on_halt"
50#define ON_POFF_STR "on_poff"
51#define ON_REIPL_STR "on_reboot"
52
53struct shutdown_action;
54struct shutdown_trigger {
55 char *name;
56 struct shutdown_action *action;
57};
58
59/*
099b7651 60 * The following shutdown action types are supported:
99ca4e58
MH		 61 */
62#define SHUTDOWN_ACTION_IPL_STR "ipl"
63#define SHUTDOWN_ACTION_REIPL_STR "reipl"
64#define SHUTDOWN_ACTION_DUMP_STR "dump"
65#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
66#define SHUTDOWN_ACTION_STOP_STR "stop"
099b7651 67#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
99ca4e58
MH		 68
69struct shutdown_action {
70 char *name;
71 void (*fn) (struct shutdown_trigger *trigger);
72 int (*init) (void);
81088819 73 int init_rc;
99ca4e58
MH		 74};
75
ff6b8ea6
MH		 76static char *ipl_type_str(enum ipl_type type)
77{
78 switch (type) {
ff6b8ea6
MH		 79 case IPL_TYPE_CCW:
80 return IPL_CCW_STR;
81 case IPL_TYPE_FCP:
82 return IPL_FCP_STR;
411ed322
MH		 83 case IPL_TYPE_FCP_DUMP:
84 return IPL_FCP_DUMP_STR;
fe355b7f
HY		 85 case IPL_TYPE_NSS:
86 return IPL_NSS_STR;
ff6b8ea6
MH		 87 case IPL_TYPE_UNKNOWN:
88 default:
89 return IPL_UNKNOWN_STR;
90 }
91}
92
411ed322
MH		 93enum dump_type {
94 DUMP_TYPE_NONE = 1,
95 DUMP_TYPE_CCW = 2,
96 DUMP_TYPE_FCP = 4,
97};
98
411ed322
MH		 99static char *dump_type_str(enum dump_type type)
100{
101 switch (type) {
102 case DUMP_TYPE_NONE:
103 return DUMP_NONE_STR;
104 case DUMP_TYPE_CCW:
105 return DUMP_CCW_STR;
106 case DUMP_TYPE_FCP:
107 return DUMP_FCP_STR;
108 default:
109 return NULL;
110 }
111}
112
113/*
114 * Must be in data section since the bss section
115 * is not cleared when these are accessed.
116 */
117static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
118u32 ipl_flags __attribute__((__section__(".data"))) = 0;
119
ff6b8ea6 120enum ipl_method {
411ed322
MH		 121 REIPL_METHOD_CCW_CIO,
122 REIPL_METHOD_CCW_DIAG,
123 REIPL_METHOD_CCW_VM,
124 REIPL_METHOD_FCP_RO_DIAG,
125 REIPL_METHOD_FCP_RW_DIAG,
126 REIPL_METHOD_FCP_RO_VM,
127 REIPL_METHOD_FCP_DUMP,
128 REIPL_METHOD_NSS,
a0443fbb 129 REIPL_METHOD_NSS_DIAG,
411ed322
MH		 130 REIPL_METHOD_DEFAULT,
131};
132
133enum dump_method {
134 DUMP_METHOD_NONE,
135 DUMP_METHOD_CCW_CIO,
136 DUMP_METHOD_CCW_DIAG,
137 DUMP_METHOD_CCW_VM,
138 DUMP_METHOD_FCP_DIAG,
ff6b8ea6
MH		 139};
140
ff6b8ea6
MH		 141static int diag308_set_works = 0;
142
a0443fbb
HB		 143static struct ipl_parameter_block ipl_block;
144
ff6b8ea6 145static int reipl_capabilities = IPL_TYPE_UNKNOWN;
fe355b7f 146
ff6b8ea6 147static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
411ed322 148static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
ff6b8ea6
MH		 149static struct ipl_parameter_block *reipl_block_fcp;
150static struct ipl_parameter_block *reipl_block_ccw;
a0443fbb 151static struct ipl_parameter_block *reipl_block_nss;
099b7651 152static struct ipl_parameter_block *reipl_block_actual;
fe355b7f 153
411ed322
MH		 154static int dump_capabilities = DUMP_TYPE_NONE;
155static enum dump_type dump_type = DUMP_TYPE_NONE;
156static enum dump_method dump_method = DUMP_METHOD_NONE;
ff6b8ea6
MH		 157static struct ipl_parameter_block *dump_block_fcp;
158static struct ipl_parameter_block *dump_block_ccw;
159
05dd2530
HC		 160static struct sclp_ipl_info sclp_ipl_info;
161
46b05d26 162int diag308(unsigned long subcode, void *addr)
ff6b8ea6 163{
94c12cc7 164 register unsigned long _addr asm("0") = (unsigned long) addr;
ff6b8ea6
MH		 165 register unsigned long _rc asm("1") = 0;
166
94c12cc7
MS		 167 asm volatile(
168 " diag %0,%2,0x308\n"
169 "0:\n"
170 EX_TABLE(0b,0b)
ff6b8ea6 171 : "+d" (_addr), "+d" (_rc)
94c12cc7 172 : "d" (subcode) : "cc", "memory");
ff6b8ea6
MH		 173 return _rc;
174}
411ed322 175EXPORT_SYMBOL_GPL(diag308);
ff6b8ea6
MH		 176
177/* SYSFS */
178
179#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
9b949165
GKH		 180static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
181 struct kobj_attribute *attr, \
ff6b8ea6
MH		 182 char *page) \
183{ \
184 return sprintf(page, _format, _value); \
185} \
9b949165 186static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 187 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
188
189#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
9b949165
GKH		 190static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
191 struct kobj_attribute *attr, \
ff6b8ea6
MH		 192 char *page) \
193{ \
194 return sprintf(page, _fmt_out, \
195 (unsigned long long) _value); \
196} \
9b949165
GKH		 197static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
198 struct kobj_attribute *attr, \
ff6b8ea6
MH		 199 const char *buf, size_t len) \
200{ \
201 unsigned long long value; \
202 if (sscanf(buf, _fmt_in, &value) != 1) \
203 return -EINVAL; \
204 _value = value; \
205 return len; \
206} \
9b949165 207static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 208 __ATTR(_name,(S_IRUGO | S_IWUSR), \
209 sys_##_prefix##_##_name##_show, \
210 sys_##_prefix##_##_name##_store);
211
fe355b7f 212#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
9b949165
GKH		 213static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
214 struct kobj_attribute *attr, \
fe355b7f
HY		 215 char *page) \
216{ \
217 return sprintf(page, _fmt_out, _value); \
218} \
9b949165
GKH		 219static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
220 struct kobj_attribute *attr, \
fe355b7f
HY		 221 const char *buf, size_t len) \
222{ \
99ca4e58 223 strncpy(_value, buf, sizeof(_value) - 1); \
1d802e24 224 strim(_value); \
fe355b7f
HY		 225 return len; \
226} \
9b949165 227static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
fe355b7f
HY		 228 __ATTR(_name,(S_IRUGO | S_IWUSR), \
229 sys_##_prefix##_##_name##_show, \
230 sys_##_prefix##_##_name##_store);
231
ff6b8ea6
MH		 232static void make_attrs_ro(struct attribute **attrs)
233{
234 while (*attrs) {
235 (*attrs)->mode = S_IRUGO;
236 attrs++;
237 }
238}
239
240/*
241 * ipl section
242 */
243
411ed322 244static __init enum ipl_type get_ipl_type(void)
ff6b8ea6
MH		 245{
246 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
247
fe355b7f
HY		 248 if (ipl_flags & IPL_NSS_VALID)
249 return IPL_TYPE_NSS;
e87bfe51 250 if (!(ipl_flags & IPL_DEVNO_VALID))
ff6b8ea6 251 return IPL_TYPE_UNKNOWN;
e87bfe51 252 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
ff6b8ea6
MH		 253 return IPL_TYPE_CCW;
254 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
255 return IPL_TYPE_UNKNOWN;
256 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
257 return IPL_TYPE_UNKNOWN;
411ed322
MH		 258 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
259 return IPL_TYPE_FCP_DUMP;
ff6b8ea6
MH		 260 return IPL_TYPE_FCP;
261}
262
411ed322
MH		 263struct ipl_info ipl_info;
264EXPORT_SYMBOL_GPL(ipl_info);
265
9b949165
GKH		 266static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
267 char *page)
ff6b8ea6 268{
411ed322 269 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
ff6b8ea6
MH		 270}
271
9b949165 272static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
ff6b8ea6 273
a0443fbb 274/* VM IPL PARM routines */
684d2fd4 275size_t reipl_get_ascii_vmparm(char *dest, size_t size,
a0443fbb
HB		 276 const struct ipl_parameter_block *ipb)
277{
278 int i;
684d2fd4 279 size_t len;
a0443fbb
HB		 280 char has_lowercase = 0;
281
684d2fd4 282 len = 0;
a0443fbb
HB		 283 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
284 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
285
684d2fd4 286 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
a0443fbb
HB		 287 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
288 /* If at least one character is lowercase, we assume mixed
289 * case; otherwise we convert everything to lowercase.
290 */
291 for (i = 0; i < len; i++)
292 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
293 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
294 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
295 has_lowercase = 1;
296 break;
297 }
298 if (!has_lowercase)
299 EBC_TOLOWER(dest, len);
300 EBCASC(dest, len);
301 }
302 dest[len] = 0;
684d2fd4
HB		 303
304 return len;
a0443fbb
HB		 305}
306
684d2fd4 307size_t append_ipl_vmparm(char *dest, size_t size)
a0443fbb 308{
684d2fd4
HB		 309 size_t rc;
310
311 rc = 0;
a0443fbb 312 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
684d2fd4 313 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
a0443fbb
HB		 314 else
315 dest[0] = 0;
684d2fd4 316 return rc;
a0443fbb
HB		 317}
318
319static ssize_t ipl_vm_parm_show(struct kobject *kobj,
320 struct kobj_attribute *attr, char *page)
321{
322 char parm[DIAG308_VMPARM_SIZE + 1] = {};
323
684d2fd4 324 append_ipl_vmparm(parm, sizeof(parm));
a0443fbb
HB		 325 return sprintf(page, "%s\n", parm);
326}
327
684d2fd4
HB		 328static size_t scpdata_length(const char* buf, size_t count)
329{
330 while (count) {
331 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
332 break;
333 count--;
334 }
335 return count;
336}
337
338size_t reipl_append_ascii_scpdata(char *dest, size_t size,
339 const struct ipl_parameter_block *ipb)
340{
341 size_t count;
342 size_t i;
18d00acf 343 int has_lowercase;
684d2fd4
HB		 344
345 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
346 ipb->ipl_info.fcp.scp_data_len));
347 if (!count)
348 goto out;
349
18d00acf
HB		 350 has_lowercase = 0;
351 for (i = 0; i < count; i++) {
684d2fd4
HB		 352 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
353 count = 0;
354 goto out;
355 }
18d00acf
HB		 356 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
357 has_lowercase = 1;
358 }
684d2fd4 359
18d00acf
HB		 360 if (has_lowercase)
361 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
362 else
363 for (i = 0; i < count; i++)
364 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
684d2fd4
HB		 365out:
366 dest[count] = '\0';
367 return count;
368}
369
370size_t append_ipl_scpdata(char *dest, size_t len)
371{
372 size_t rc;
373
374 rc = 0;
375 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
376 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
377 else
378 dest[0] = 0;
379 return rc;
380}
381
382
a0443fbb
HB		 383static struct kobj_attribute sys_ipl_vm_parm_attr =
384 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
385
9b949165
GKH		 386static ssize_t sys_ipl_device_show(struct kobject *kobj,
387 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 388{
389 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
390
411ed322 391 switch (ipl_info.type) {
ff6b8ea6
MH		 392 case IPL_TYPE_CCW:
393 return sprintf(page, "0.0.%04x\n", ipl_devno);
394 case IPL_TYPE_FCP:
411ed322 395 case IPL_TYPE_FCP_DUMP:
ff6b8ea6
MH		 396 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
397 default:
398 return 0;
399 }
400}
401
9b949165 402static struct kobj_attribute sys_ipl_device_attr =
ff6b8ea6
MH		 403 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
404
05bd711e
AV		 405static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
406 char *buf, loff_t off, size_t count)
ff6b8ea6 407{
0788fea4
AM		 408 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
409 IPL_PARMBLOCK_SIZE);
ff6b8ea6
MH		 410}
411
412static struct bin_attribute ipl_parameter_attr = {
413 .attr = {
414 .name = "binary_parameter",
415 .mode = S_IRUGO,
ff6b8ea6
MH		 416 },
417 .size = PAGE_SIZE,
418 .read = &ipl_parameter_read,
419};
420
05bd711e
AV		 421static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
422 char *buf, loff_t off, size_t count)
ff6b8ea6
MH		 423{
424 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
425 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
426
0788fea4 427 return memory_read_from_buffer(buf, count, &off, scp_data, size);
ff6b8ea6
MH		 428}
429
430static struct bin_attribute ipl_scp_data_attr = {
431 .attr = {
432 .name = "scp_data",
433 .mode = S_IRUGO,
ff6b8ea6
MH		 434 },
435 .size = PAGE_SIZE,
05bd711e 436 .read = ipl_scp_data_read,
ff6b8ea6
MH		 437};
438
439/* FCP ipl device attributes */
440
441DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
442 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
443DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
444 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
445DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
446 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
447DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
448 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
449
450static struct attribute *ipl_fcp_attrs[] = {
451 &sys_ipl_type_attr.attr,
452 &sys_ipl_device_attr.attr,
453 &sys_ipl_fcp_wwpn_attr.attr,
454 &sys_ipl_fcp_lun_attr.attr,
455 &sys_ipl_fcp_bootprog_attr.attr,
456 &sys_ipl_fcp_br_lba_attr.attr,
457 NULL,
458};
459
460static struct attribute_group ipl_fcp_attr_group = {
461 .attrs = ipl_fcp_attrs,
462};
463
464/* CCW ipl device attributes */
465
9b949165
GKH		 466static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
467 struct kobj_attribute *attr, char *page)
03a4d208
MH		 468{
469 char loadparm[LOADPARM_LEN + 1] = {};
470
05dd2530 471 if (!sclp_ipl_info.is_valid)
03a4d208 472 return sprintf(page, "#unknown#\n");
05dd2530 473 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
03a4d208 474 EBCASC(loadparm, LOADPARM_LEN);
1d802e24 475 strim(loadparm);
03a4d208
MH		 476 return sprintf(page, "%s\n", loadparm);
477}
478
9b949165 479static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
03a4d208
MH		 480 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
481
a0443fbb
HB		 482static struct attribute *ipl_ccw_attrs_vm[] = {
483 &sys_ipl_type_attr.attr,
484 &sys_ipl_device_attr.attr,
485 &sys_ipl_ccw_loadparm_attr.attr,
486 &sys_ipl_vm_parm_attr.attr,
487 NULL,
488};
489
490static struct attribute *ipl_ccw_attrs_lpar[] = {
ff6b8ea6
MH		 491 &sys_ipl_type_attr.attr,
492 &sys_ipl_device_attr.attr,
03a4d208 493 &sys_ipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 494 NULL,
495};
496
a0443fbb
HB		 497static struct attribute_group ipl_ccw_attr_group_vm = {
498 .attrs = ipl_ccw_attrs_vm,
499};
500
501static struct attribute_group ipl_ccw_attr_group_lpar = {
502 .attrs = ipl_ccw_attrs_lpar
ff6b8ea6
MH		 503};
504
fe355b7f
HY		 505/* NSS ipl device attributes */
506
507DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
508
509static struct attribute *ipl_nss_attrs[] = {
510 &sys_ipl_type_attr.attr,
511 &sys_ipl_nss_name_attr.attr,
a0443fbb
HB		 512 &sys_ipl_ccw_loadparm_attr.attr,
513 &sys_ipl_vm_parm_attr.attr,
fe355b7f
HY		 514 NULL,
515};
516
517static struct attribute_group ipl_nss_attr_group = {
518 .attrs = ipl_nss_attrs,
519};
520
ff6b8ea6
MH		 521/* UNKNOWN ipl device attributes */
522
523static struct attribute *ipl_unknown_attrs[] = {
524 &sys_ipl_type_attr.attr,
525 NULL,
526};
527
528static struct attribute_group ipl_unknown_attr_group = {
529 .attrs = ipl_unknown_attrs,
530};
531
d91885be 532static struct kset *ipl_kset;
ff6b8ea6 533
99ca4e58
MH		 534static int __init ipl_register_fcp_files(void)
535{
536 int rc;
537
538 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
539 if (rc)
540 goto out;
541 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
542 if (rc)
543 goto out_ipl_parm;
544 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
545 if (!rc)
546 goto out;
547
548 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
549
550out_ipl_parm:
551 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
552out:
553 return rc;
554}
555
2c2df118 556static void __ipl_run(void *unused)
99ca4e58
MH		 557{
558 diag308(DIAG308_IPL, NULL);
559 if (MACHINE_IS_VM)
560 __cpcmd("IPL", NULL, 0, NULL);
561 else if (ipl_info.type == IPL_TYPE_CCW)
562 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
563}
564
2c2df118
HC		 565static void ipl_run(struct shutdown_trigger *trigger)
566{
567 smp_switch_to_ipl_cpu(__ipl_run, NULL);
568}
569
2bc89b5e 570static int __init ipl_init(void)
99ca4e58
MH		 571{
572 int rc;
573
574 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
575 if (!ipl_kset) {
576 rc = -ENOMEM;
577 goto out;
578 }
579 switch (ipl_info.type) {
580 case IPL_TYPE_CCW:
a0443fbb
HB		 581 if (MACHINE_IS_VM)
582 rc = sysfs_create_group(&ipl_kset->kobj,
583 &ipl_ccw_attr_group_vm);
584 else
585 rc = sysfs_create_group(&ipl_kset->kobj,
586 &ipl_ccw_attr_group_lpar);
99ca4e58
MH		 587 break;
588 case IPL_TYPE_FCP:
589 case IPL_TYPE_FCP_DUMP:
590 rc = ipl_register_fcp_files();
591 break;
592 case IPL_TYPE_NSS:
593 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
594 break;
595 default:
596 rc = sysfs_create_group(&ipl_kset->kobj,
597 &ipl_unknown_attr_group);
598 break;
599 }
600out:
601 if (rc)
602 panic("ipl_init failed: rc = %i\n", rc);
603
604 return 0;
605}
606
2bc89b5e
HC		 607static struct shutdown_action __refdata ipl_action = {
608 .name = SHUTDOWN_ACTION_IPL_STR,
609 .fn = ipl_run,
610 .init = ipl_init,
611};
99ca4e58 612
ff6b8ea6 613/*
99ca4e58 614 * reipl shutdown action: Reboot Linux on shutdown.
ff6b8ea6
MH		 615 */
616
a0443fbb
HB		 617/* VM IPL PARM attributes */
618static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
619 char *page)
620{
621 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
622
684d2fd4 623 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 624 return sprintf(page, "%s\n", vmparm);
625}
626
627static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
628 size_t vmparm_max,
629 const char *buf, size_t len)
630{
631 int i, ip_len;
632
633 /* ignore trailing newline */
634 ip_len = len;
635 if ((len > 0) && (buf[len - 1] == '\n'))
636 ip_len--;
637
638 if (ip_len > vmparm_max)
639 return -EINVAL;
640
641 /* parm is used to store kernel options, check for common chars */
642 for (i = 0; i < ip_len; i++)
643 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
644 return -EINVAL;
645
646 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
647 ipb->ipl_info.ccw.vm_parm_len = ip_len;
648 if (ip_len > 0) {
649 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
650 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
651 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
652 } else {
653 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
654 }
655
656 return len;
657}
658
659/* NSS wrapper */
660static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
661 struct kobj_attribute *attr, char *page)
662{
663 return reipl_generic_vmparm_show(reipl_block_nss, page);
664}
665
666static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
667 struct kobj_attribute *attr,
668 const char *buf, size_t len)
669{
670 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
671}
672
673/* CCW wrapper */
674static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
675 struct kobj_attribute *attr, char *page)
676{
677 return reipl_generic_vmparm_show(reipl_block_ccw, page);
678}
679
680static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
681 struct kobj_attribute *attr,
682 const char *buf, size_t len)
683{
684 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
685}
686
687static struct kobj_attribute sys_reipl_nss_vmparm_attr =
688 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
689 reipl_nss_vmparm_store);
690static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
691 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
692 reipl_ccw_vmparm_store);
693
ff6b8ea6
MH		 694/* FCP reipl device attributes */
695
684d2fd4
HB		 696static ssize_t reipl_fcp_scpdata_read(struct kobject *kobj,
697 struct bin_attribute *attr,
698 char *buf, loff_t off, size_t count)
699{
700 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
701 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
702
703 return memory_read_from_buffer(buf, count, &off, scp_data, size);
704}
705
706static ssize_t reipl_fcp_scpdata_write(struct kobject *kobj,
707 struct bin_attribute *attr,
708 char *buf, loff_t off, size_t count)
709{
710 size_t padding;
711 size_t scpdata_len;
712
713 if (off < 0)
714 return -EINVAL;
715
716 if (off >= DIAG308_SCPDATA_SIZE)
717 return -ENOSPC;
718
719 if (count > DIAG308_SCPDATA_SIZE - off)
720 count = DIAG308_SCPDATA_SIZE - off;
721
722 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
723 scpdata_len = off + count;
724
725 if (scpdata_len % 8) {
726 padding = 8 - (scpdata_len % 8);
727 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
728 0, padding);
729 scpdata_len += padding;
730 }
731
732 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
733 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
734 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
735
736 return count;
737}
738
739static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
740 .attr = {
741 .name = "scp_data",
742 .mode = S_IRUGO | S_IWUSR,
743 },
744 .size = PAGE_SIZE,
745 .read = reipl_fcp_scpdata_read,
746 .write = reipl_fcp_scpdata_write,
747};
748
ff6b8ea6
MH		 749DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
750 reipl_block_fcp->ipl_info.fcp.wwpn);
751DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
752 reipl_block_fcp->ipl_info.fcp.lun);
753DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
754 reipl_block_fcp->ipl_info.fcp.bootprog);
755DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
756 reipl_block_fcp->ipl_info.fcp.br_lba);
757DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
758 reipl_block_fcp->ipl_info.fcp.devno);
759
760static struct attribute *reipl_fcp_attrs[] = {
761 &sys_reipl_fcp_device_attr.attr,
762 &sys_reipl_fcp_wwpn_attr.attr,
763 &sys_reipl_fcp_lun_attr.attr,
764 &sys_reipl_fcp_bootprog_attr.attr,
765 &sys_reipl_fcp_br_lba_attr.attr,
766 NULL,
767};
768
769static struct attribute_group reipl_fcp_attr_group = {
ff6b8ea6
MH		 770 .attrs = reipl_fcp_attrs,
771};
772
773/* CCW reipl device attributes */
774
775DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
776 reipl_block_ccw->ipl_info.ccw.devno);
777
a0443fbb
HB		 778static void reipl_get_ascii_loadparm(char *loadparm,
779 struct ipl_parameter_block *ibp)
03a4d208 780{
a0443fbb 781 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 782 EBCASC(loadparm, LOADPARM_LEN);
783 loadparm[LOADPARM_LEN] = 0;
1d802e24 784 strim(loadparm);
03a4d208
MH		 785}
786
a0443fbb
HB		 787static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
788 char *page)
03a4d208
MH		 789{
790 char buf[LOADPARM_LEN + 1];
791
a0443fbb 792 reipl_get_ascii_loadparm(buf, ipb);
03a4d208
MH		 793 return sprintf(page, "%s\n", buf);
794}
795
a0443fbb
HB		 796static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
797 const char *buf, size_t len)
03a4d208
MH		 798{
799 int i, lp_len;
800
801 /* ignore trailing newline */
802 lp_len = len;
803 if ((len > 0) && (buf[len - 1] == '\n'))
804 lp_len--;
805 /* loadparm can have max 8 characters and must not start with a blank */
806 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
807 return -EINVAL;
808 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
809 for (i = 0; i < lp_len; i++) {
810 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
811 (buf[i] == '.'))
812 continue;
813 return -EINVAL;
814 }
815 /* initialize loadparm with blanks */
a0443fbb 816 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
03a4d208 817 /* copy and convert to ebcdic */
a0443fbb
HB		 818 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
819 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 820 return len;
821}
822
a0443fbb
HB		 823/* NSS wrapper */
824static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
825 struct kobj_attribute *attr, char *page)
826{
827 return reipl_generic_loadparm_show(reipl_block_nss, page);
828}
829
830static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
831 struct kobj_attribute *attr,
832 const char *buf, size_t len)
833{
834 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
835}
836
837/* CCW wrapper */
838static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
839 struct kobj_attribute *attr, char *page)
840{
841 return reipl_generic_loadparm_show(reipl_block_ccw, page);
842}
843
844static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
845 struct kobj_attribute *attr,
846 const char *buf, size_t len)
847{
848 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
849}
850
9b949165 851static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
a0443fbb
HB		 852 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
853 reipl_ccw_loadparm_store);
854
855static struct attribute *reipl_ccw_attrs_vm[] = {
856 &sys_reipl_ccw_device_attr.attr,
857 &sys_reipl_ccw_loadparm_attr.attr,
858 &sys_reipl_ccw_vmparm_attr.attr,
859 NULL,
860};
03a4d208 861
a0443fbb 862static struct attribute *reipl_ccw_attrs_lpar[] = {
ff6b8ea6 863 &sys_reipl_ccw_device_attr.attr,
03a4d208 864 &sys_reipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 865 NULL,
866};
867
a0443fbb 868static struct attribute_group reipl_ccw_attr_group_vm = {
ff6b8ea6 869 .name = IPL_CCW_STR,
a0443fbb
HB		 870 .attrs = reipl_ccw_attrs_vm,
871};
872
873static struct attribute_group reipl_ccw_attr_group_lpar = {
874 .name = IPL_CCW_STR,
875 .attrs = reipl_ccw_attrs_lpar,
ff6b8ea6
MH		 876};
877
fe355b7f
HY		 878
879/* NSS reipl device attributes */
a0443fbb
HB		 880static void reipl_get_ascii_nss_name(char *dst,
881 struct ipl_parameter_block *ipb)
882{
883 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
884 EBCASC(dst, NSS_NAME_SIZE);
885 dst[NSS_NAME_SIZE] = 0;
886}
887
888static ssize_t reipl_nss_name_show(struct kobject *kobj,
889 struct kobj_attribute *attr, char *page)
890{
891 char nss_name[NSS_NAME_SIZE + 1] = {};
892
893 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
894 return sprintf(page, "%s\n", nss_name);
895}
896
897static ssize_t reipl_nss_name_store(struct kobject *kobj,
898 struct kobj_attribute *attr,
899 const char *buf, size_t len)
900{
901 int nss_len;
902
903 /* ignore trailing newline */
904 nss_len = len;
905 if ((len > 0) && (buf[len - 1] == '\n'))
906 nss_len--;
fe355b7f 907
a0443fbb
HB		 908 if (nss_len > NSS_NAME_SIZE)
909 return -EINVAL;
910
911 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
912 if (nss_len > 0) {
913 reipl_block_nss->ipl_info.ccw.vm_flags |=
914 DIAG308_VM_FLAGS_NSS_VALID;
915 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
916 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
917 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
918 } else {
919 reipl_block_nss->ipl_info.ccw.vm_flags &=
920 ~DIAG308_VM_FLAGS_NSS_VALID;
921 }
922
923 return len;
924}
925
926static struct kobj_attribute sys_reipl_nss_name_attr =
927 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
928 reipl_nss_name_store);
929
930static struct kobj_attribute sys_reipl_nss_loadparm_attr =
931 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
932 reipl_nss_loadparm_store);
fe355b7f
HY		 933
934static struct attribute *reipl_nss_attrs[] = {
935 &sys_reipl_nss_name_attr.attr,
a0443fbb
HB		 936 &sys_reipl_nss_loadparm_attr.attr,
937 &sys_reipl_nss_vmparm_attr.attr,
fe355b7f
HY		 938 NULL,
939};
940
941static struct attribute_group reipl_nss_attr_group = {
942 .name = IPL_NSS_STR,
943 .attrs = reipl_nss_attrs,
944};
945
ff6b8ea6
MH		 946/* reipl type */
947
948static int reipl_set_type(enum ipl_type type)
949{
950 if (!(reipl_capabilities & type))
951 return -EINVAL;
952
953 switch(type) {
954 case IPL_TYPE_CCW:
48657d22
MH		 955 if (diag308_set_works)
956 reipl_method = REIPL_METHOD_CCW_DIAG;
957 else if (MACHINE_IS_VM)
411ed322 958 reipl_method = REIPL_METHOD_CCW_VM;
ff6b8ea6 959 else
411ed322 960 reipl_method = REIPL_METHOD_CCW_CIO;
099b7651 961 reipl_block_actual = reipl_block_ccw;
ff6b8ea6
MH		 962 break;
963 case IPL_TYPE_FCP:
964 if (diag308_set_works)
411ed322 965 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
ff6b8ea6 966 else if (MACHINE_IS_VM)
411ed322 967 reipl_method = REIPL_METHOD_FCP_RO_VM;
ff6b8ea6 968 else
411ed322 969 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
099b7651 970 reipl_block_actual = reipl_block_fcp;
411ed322
MH		 971 break;
972 case IPL_TYPE_FCP_DUMP:
973 reipl_method = REIPL_METHOD_FCP_DUMP;
ff6b8ea6 974 break;
fe355b7f 975 case IPL_TYPE_NSS:
a0443fbb
HB		 976 if (diag308_set_works)
977 reipl_method = REIPL_METHOD_NSS_DIAG;
978 else
979 reipl_method = REIPL_METHOD_NSS;
099b7651 980 reipl_block_actual = reipl_block_nss;
411ed322
MH		 981 break;
982 case IPL_TYPE_UNKNOWN:
983 reipl_method = REIPL_METHOD_DEFAULT;
fe355b7f 984 break;
ff6b8ea6 985 default:
411ed322 986 BUG();
ff6b8ea6
MH		 987 }
988 reipl_type = type;
989 return 0;
990}
991
9b949165
GKH		 992static ssize_t reipl_type_show(struct kobject *kobj,
993 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 994{
995 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
996}
997
9b949165
GKH		 998static ssize_t reipl_type_store(struct kobject *kobj,
999 struct kobj_attribute *attr,
1000 const char *buf, size_t len)
ff6b8ea6
MH		 1001{
1002 int rc = -EINVAL;
1003
1004 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1005 rc = reipl_set_type(IPL_TYPE_CCW);
1006 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1007 rc = reipl_set_type(IPL_TYPE_FCP);
fe355b7f
HY		 1008 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1009 rc = reipl_set_type(IPL_TYPE_NSS);
ff6b8ea6
MH		 1010 return (rc != 0) ? rc : len;
1011}
1012
9b949165 1013static struct kobj_attribute reipl_type_attr =
99ca4e58 1014 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
ff6b8ea6 1015
d91885be 1016static struct kset *reipl_kset;
684d2fd4 1017static struct kset *reipl_fcp_kset;
ff6b8ea6 1018
a0443fbb
HB		 1019static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1020 const enum ipl_method m)
1021{
1022 char loadparm[LOADPARM_LEN + 1] = {};
1023 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1024 char nss_name[NSS_NAME_SIZE + 1] = {};
1025 size_t pos = 0;
1026
1027 reipl_get_ascii_loadparm(loadparm, ipb);
1028 reipl_get_ascii_nss_name(nss_name, ipb);
684d2fd4 1029 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 1030
1031 switch (m) {
1032 case REIPL_METHOD_CCW_VM:
1033 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1034 break;
1035 case REIPL_METHOD_NSS:
1036 pos = sprintf(dst, "IPL %s", nss_name);
1037 break;
1038 default:
1039 break;
1040 }
1041 if (strlen(loadparm) > 0)
1042 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1043 if (strlen(vmparm) > 0)
1044 sprintf(dst + pos, " PARM %s", vmparm);
1045}
1046
2c2df118 1047static void __reipl_run(void *unused)
ff6b8ea6
MH		 1048{
1049 struct ccw_dev_id devid;
a0443fbb 1050 static char buf[128];
ff6b8ea6 1051
ff6b8ea6 1052 switch (reipl_method) {
411ed322 1053 case REIPL_METHOD_CCW_CIO:
ff6b8ea6
MH		 1054 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1055 devid.ssid = 0;
1056 reipl_ccw_dev(&devid);
1057 break;
411ed322 1058 case REIPL_METHOD_CCW_VM:
a0443fbb 1059 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
740b5706 1060 __cpcmd(buf, NULL, 0, NULL);
ff6b8ea6 1061 break;
411ed322 1062 case REIPL_METHOD_CCW_DIAG:
ff6b8ea6
MH		 1063 diag308(DIAG308_SET, reipl_block_ccw);
1064 diag308(DIAG308_IPL, NULL);
1065 break;
411ed322 1066 case REIPL_METHOD_FCP_RW_DIAG:
ff6b8ea6
MH		 1067 diag308(DIAG308_SET, reipl_block_fcp);
1068 diag308(DIAG308_IPL, NULL);
1069 break;
411ed322 1070 case REIPL_METHOD_FCP_RO_DIAG:
ff6b8ea6
MH		 1071 diag308(DIAG308_IPL, NULL);
1072 break;
411ed322 1073 case REIPL_METHOD_FCP_RO_VM:
740b5706 1074 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6 1075 break;
a0443fbb
HB		 1076 case REIPL_METHOD_NSS_DIAG:
1077 diag308(DIAG308_SET, reipl_block_nss);
1078 diag308(DIAG308_IPL, NULL);
1079 break;
411ed322 1080 case REIPL_METHOD_NSS:
a0443fbb 1081 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
fe355b7f
HY		 1082 __cpcmd(buf, NULL, 0, NULL);
1083 break;
411ed322 1084 case REIPL_METHOD_DEFAULT:
ff6b8ea6 1085 if (MACHINE_IS_VM)
740b5706 1086 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6
MH		 1087 diag308(DIAG308_IPL, NULL);
1088 break;
411ed322 1089 case REIPL_METHOD_FCP_DUMP:
411ed322 1090 break;
ff6b8ea6 1091 }
208e5591 1092 disabled_wait((unsigned long) __builtin_return_address(0));
ff6b8ea6
MH		 1093}
1094
2c2df118
HC		 1095static void reipl_run(struct shutdown_trigger *trigger)
1096{
1097 smp_switch_to_ipl_cpu(__reipl_run, NULL);
1098}
1099
a0443fbb 1100static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
ff6b8ea6 1101{
a0443fbb
HB		 1102 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1103 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1104 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1105 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1106}
ff6b8ea6 1107
a0443fbb
HB		 1108static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1109{
1110 /* LOADPARM */
1111 /* check if read scp info worked and set loadparm */
1112 if (sclp_ipl_info.is_valid)
1113 memcpy(ipb->ipl_info.ccw.load_parm,
1114 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1115 else
1116 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1117 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1118 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1119
1120 /* VM PARM */
1121 if (MACHINE_IS_VM && diag308_set_works &&
1122 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1123
1124 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1125 ipb->ipl_info.ccw.vm_parm_len =
1126 ipl_block.ipl_info.ccw.vm_parm_len;
1127 memcpy(ipb->ipl_info.ccw.vm_parm,
1128 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1129 }
ff6b8ea6
MH		 1130}
1131
99ca4e58 1132static int __init reipl_nss_init(void)
ff6b8ea6
MH		 1133{
1134 int rc;
1135
99ca4e58
MH		 1136 if (!MACHINE_IS_VM)
1137 return 0;
a0443fbb
HB		 1138
1139 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1140 if (!reipl_block_nss)
1141 return -ENOMEM;
1142
1143 if (!diag308_set_works)
1144 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1145
99ca4e58 1146 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
fe355b7f
HY		 1147 if (rc)
1148 return rc;
a0443fbb
HB		 1149
1150 reipl_block_ccw_init(reipl_block_nss);
1151 if (ipl_info.type == IPL_TYPE_NSS) {
1152 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1153 ' ', NSS_NAME_SIZE);
1154 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1155 kernel_nss_name, strlen(kernel_nss_name));
1156 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1157 reipl_block_nss->ipl_info.ccw.vm_flags |=
1158 DIAG308_VM_FLAGS_NSS_VALID;
1159
1160 reipl_block_ccw_fill_parms(reipl_block_nss);
1161 }
1162
fe355b7f
HY		 1163 reipl_capabilities |= IPL_TYPE_NSS;
1164 return 0;
1165}
1166
ff6b8ea6
MH		 1167static int __init reipl_ccw_init(void)
1168{
1169 int rc;
1170
1171 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1172 if (!reipl_block_ccw)
1173 return -ENOMEM;
a0443fbb
HB		 1174
1175 if (MACHINE_IS_VM) {
1176 if (!diag308_set_works)
1177 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1178 rc = sysfs_create_group(&reipl_kset->kobj,
1179 &reipl_ccw_attr_group_vm);
1180 } else {
1181 if(!diag308_set_works)
1182 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1183 rc = sysfs_create_group(&reipl_kset->kobj,
1184 &reipl_ccw_attr_group_lpar);
ff6b8ea6 1185 }
a0443fbb
HB		 1186 if (rc)
1187 return rc;
1188
1189 reipl_block_ccw_init(reipl_block_ccw);
1190 if (ipl_info.type == IPL_TYPE_CCW) {
ff6b8ea6 1191 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
a0443fbb
HB		 1192 reipl_block_ccw_fill_parms(reipl_block_ccw);
1193 }
1194
ff6b8ea6
MH		 1195 reipl_capabilities |= IPL_TYPE_CCW;
1196 return 0;
1197}
1198
1199static int __init reipl_fcp_init(void)
1200{
1201 int rc;
1202
008d2d11 1203 if (!diag308_set_works) {
684d2fd4 1204 if (ipl_info.type == IPL_TYPE_FCP) {
008d2d11 1205 make_attrs_ro(reipl_fcp_attrs);
684d2fd4
HB		 1206 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1207 } else
008d2d11
MH		 1208 return 0;
1209 }
ff6b8ea6
MH		 1210
1211 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1212 if (!reipl_block_fcp)
1213 return -ENOMEM;
684d2fd4
HB		 1214
1215 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1216 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1217 &reipl_kset->kobj);
1218 if (!reipl_kset) {
1219 free_page((unsigned long) reipl_block_fcp);
1220 return -ENOMEM;
1221 }
1222
1223 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
ff6b8ea6 1224 if (rc) {
684d2fd4
HB		 1225 kset_unregister(reipl_fcp_kset);
1226 free_page((unsigned long) reipl_block_fcp);
ff6b8ea6
MH		 1227 return rc;
1228 }
684d2fd4
HB		 1229
1230 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1231 &sys_reipl_fcp_scp_data_attr);
1232 if (rc) {
1233 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1234 kset_unregister(reipl_fcp_kset);
1235 free_page((unsigned long) reipl_block_fcp);
1236 return rc;
1237 }
1238
1239 if (ipl_info.type == IPL_TYPE_FCP)
ff6b8ea6 1240 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
684d2fd4 1241 else {
ff6b8ea6
MH		 1242 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1243 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1244 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1245 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1246 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1247 }
1248 reipl_capabilities |= IPL_TYPE_FCP;
1249 return 0;
1250}
1251
2bc89b5e 1252static int __init reipl_init(void)
ff6b8ea6
MH		 1253{
1254 int rc;
1255
f62ed9e3 1256 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
d91885be
GKH		 1257 if (!reipl_kset)
1258 return -ENOMEM;
1259 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
ff6b8ea6 1260 if (rc) {
d91885be 1261 kset_unregister(reipl_kset);
ff6b8ea6
MH		 1262 return rc;
1263 }
1264 rc = reipl_ccw_init();
1265 if (rc)
1266 return rc;
1267 rc = reipl_fcp_init();
fe355b7f
HY		 1268 if (rc)
1269 return rc;
1270 rc = reipl_nss_init();
ff6b8ea6
MH		 1271 if (rc)
1272 return rc;
411ed322 1273 rc = reipl_set_type(ipl_info.type);
ff6b8ea6
MH		 1274 if (rc)
1275 return rc;
1276 return 0;
1277}
1278
2bc89b5e
HC		 1279static struct shutdown_action __refdata reipl_action = {
1280 .name = SHUTDOWN_ACTION_REIPL_STR,
1281 .fn = reipl_run,
1282 .init = reipl_init,
1283};
99ca4e58
MH		 1284
1285/*
1286 * dump shutdown action: Dump Linux on shutdown.
1287 */
1288
1289/* FCP dump device attributes */
1290
1291DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1292 dump_block_fcp->ipl_info.fcp.wwpn);
1293DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1294 dump_block_fcp->ipl_info.fcp.lun);
1295DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1296 dump_block_fcp->ipl_info.fcp.bootprog);
1297DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1298 dump_block_fcp->ipl_info.fcp.br_lba);
1299DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1300 dump_block_fcp->ipl_info.fcp.devno);
1301
1302static struct attribute *dump_fcp_attrs[] = {
1303 &sys_dump_fcp_device_attr.attr,
1304 &sys_dump_fcp_wwpn_attr.attr,
1305 &sys_dump_fcp_lun_attr.attr,
1306 &sys_dump_fcp_bootprog_attr.attr,
1307 &sys_dump_fcp_br_lba_attr.attr,
1308 NULL,
1309};
1310
1311static struct attribute_group dump_fcp_attr_group = {
1312 .name = IPL_FCP_STR,
1313 .attrs = dump_fcp_attrs,
1314};
1315
1316/* CCW dump device attributes */
1317
1318DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1319 dump_block_ccw->ipl_info.ccw.devno);
1320
1321static struct attribute *dump_ccw_attrs[] = {
1322 &sys_dump_ccw_device_attr.attr,
1323 NULL,
1324};
1325
1326static struct attribute_group dump_ccw_attr_group = {
1327 .name = IPL_CCW_STR,
1328 .attrs = dump_ccw_attrs,
1329};
1330
1331/* dump type */
1332
1333static int dump_set_type(enum dump_type type)
1334{
1335 if (!(dump_capabilities & type))
1336 return -EINVAL;
1337 switch (type) {
1338 case DUMP_TYPE_CCW:
48657d22
MH		 1339 if (diag308_set_works)
1340 dump_method = DUMP_METHOD_CCW_DIAG;
1341 else if (MACHINE_IS_VM)
99ca4e58
MH		 1342 dump_method = DUMP_METHOD_CCW_VM;
1343 else
1344 dump_method = DUMP_METHOD_CCW_CIO;
1345 break;
1346 case DUMP_TYPE_FCP:
1347 dump_method = DUMP_METHOD_FCP_DIAG;
1348 break;
1349 default:
1350 dump_method = DUMP_METHOD_NONE;
1351 }
1352 dump_type = type;
1353 return 0;
1354}
1355
1356static ssize_t dump_type_show(struct kobject *kobj,
1357 struct kobj_attribute *attr, char *page)
1358{
1359 return sprintf(page, "%s\n", dump_type_str(dump_type));
1360}
1361
1362static ssize_t dump_type_store(struct kobject *kobj,
1363 struct kobj_attribute *attr,
1364 const char *buf, size_t len)
1365{
1366 int rc = -EINVAL;
1367
1368 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1369 rc = dump_set_type(DUMP_TYPE_NONE);
1370 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1371 rc = dump_set_type(DUMP_TYPE_CCW);
1372 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1373 rc = dump_set_type(DUMP_TYPE_FCP);
1374 return (rc != 0) ? rc : len;
1375}
1376
1377static struct kobj_attribute dump_type_attr =
1378 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1379
1380static struct kset *dump_kset;
1381
2c2df118 1382static void __dump_run(void *unused)
99ca4e58
MH		 1383{
1384 struct ccw_dev_id devid;
1385 static char buf[100];
1386
1387 switch (dump_method) {
1388 case DUMP_METHOD_CCW_CIO:
99ca4e58
MH		 1389 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1390 devid.ssid = 0;
1391 reipl_ccw_dev(&devid);
1392 break;
1393 case DUMP_METHOD_CCW_VM:
99ca4e58
MH		 1394 sprintf(buf, "STORE STATUS");
1395 __cpcmd(buf, NULL, 0, NULL);
1396 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1397 __cpcmd(buf, NULL, 0, NULL);
1398 break;
1399 case DUMP_METHOD_CCW_DIAG:
1400 diag308(DIAG308_SET, dump_block_ccw);
1401 diag308(DIAG308_DUMP, NULL);
1402 break;
1403 case DUMP_METHOD_FCP_DIAG:
1404 diag308(DIAG308_SET, dump_block_fcp);
1405 diag308(DIAG308_DUMP, NULL);
1406 break;
2c2df118
HC		 1407 default:
1408 break;
99ca4e58 1409 }
2c2df118
HC		 1410}
1411
1412static void dump_run(struct shutdown_trigger *trigger)
1413{
1414 if (dump_method == DUMP_METHOD_NONE)
1415 return;
1416 smp_send_stop();
1417 smp_switch_to_ipl_cpu(__dump_run, NULL);
99ca4e58
MH		 1418}
1419
ff6b8ea6
MH		 1420static int __init dump_ccw_init(void)
1421{
1422 int rc;
1423
1424 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1425 if (!dump_block_ccw)
1426 return -ENOMEM;
d91885be 1427 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
ff6b8ea6
MH		 1428 if (rc) {
1429 free_page((unsigned long)dump_block_ccw);
1430 return rc;
1431 }
1432 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1433 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1434 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
ff6b8ea6 1435 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
411ed322 1436 dump_capabilities |= DUMP_TYPE_CCW;
ff6b8ea6
MH		 1437 return 0;
1438}
1439
ff6b8ea6
MH		 1440static int __init dump_fcp_init(void)
1441{
1442 int rc;
1443
05dd2530 1444 if (!sclp_ipl_info.has_dump)
ff6b8ea6
MH		 1445 return 0; /* LDIPL DUMP is not installed */
1446 if (!diag308_set_works)
1447 return 0;
1448 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1449 if (!dump_block_fcp)
1450 return -ENOMEM;
d91885be 1451 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
ff6b8ea6
MH		 1452 if (rc) {
1453 free_page((unsigned long)dump_block_fcp);
1454 return rc;
1455 }
1456 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1457 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1458 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1459 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1460 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
411ed322 1461 dump_capabilities |= DUMP_TYPE_FCP;
ff6b8ea6
MH		 1462 return 0;
1463}
1464
2bc89b5e 1465static int __init dump_init(void)
ff6b8ea6
MH		 1466{
1467 int rc;
1468
f62ed9e3 1469 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
d91885be
GKH		 1470 if (!dump_kset)
1471 return -ENOMEM;
99ca4e58 1472 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
ff6b8ea6 1473 if (rc) {
d91885be 1474 kset_unregister(dump_kset);
ff6b8ea6
MH		 1475 return rc;
1476 }
1477 rc = dump_ccw_init();
1478 if (rc)
1479 return rc;
1480 rc = dump_fcp_init();
1481 if (rc)
1482 return rc;
411ed322 1483 dump_set_type(DUMP_TYPE_NONE);
ff6b8ea6
MH		 1484 return 0;
1485}
1486
2bc89b5e
HC		 1487static struct shutdown_action __refdata dump_action = {
1488 .name = SHUTDOWN_ACTION_DUMP_STR,
1489 .fn = dump_run,
1490 .init = dump_init,
1491};
99ca4e58 1492
099b7651
FM		 1493static void dump_reipl_run(struct shutdown_trigger *trigger)
1494{
1495 preempt_disable();
1496 /*
1497 * Bypass dynamic address translation (DAT) when storing IPL parameter
1498 * information block address and checksum into the prefix area
1499 * (corresponding to absolute addresses 0-8191).
1500 * When enhanced DAT applies and the STE format control in one,
1501 * the absolute address is formed without prefixing. In this case a
1502 * normal store (stg/st) into the prefix area would no more match to
1503 * absolute addresses 0-8191.
1504 */
1505#ifdef CONFIG_64BIT
1506 asm volatile("sturg %0,%1"
1507 :: "a" ((unsigned long) reipl_block_actual),
1508 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1509#else
1510 asm volatile("stura %0,%1"
1511 :: "a" ((unsigned long) reipl_block_actual),
1512 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1513#endif
1514 asm volatile("stura %0,%1"
159d1ff8
FM		 1515 :: "a" (csum_partial(reipl_block_actual,
1516 reipl_block_actual->hdr.len, 0)),
099b7651
FM		 1517 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1518 preempt_enable();
1519 dump_run(trigger);
1520}
1521
1522static int __init dump_reipl_init(void)
1523{
1524 if (!diag308_set_works)
1525 return -EOPNOTSUPP;
1526 else
1527 return 0;
1528}
1529
1530static struct shutdown_action __refdata dump_reipl_action = {
1531 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1532 .fn = dump_reipl_run,
1533 .init = dump_reipl_init,
1534};
1535
99ca4e58
MH		 1536/*
1537 * vmcmd shutdown action: Trigger vm command on shutdown.
1538 */
1539
1540static char vmcmd_on_reboot[128];
1541static char vmcmd_on_panic[128];
1542static char vmcmd_on_halt[128];
1543static char vmcmd_on_poff[128];
1544
1545DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1546DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1547DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1548DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1549
1550static struct attribute *vmcmd_attrs[] = {
1551 &sys_vmcmd_on_reboot_attr.attr,
1552 &sys_vmcmd_on_panic_attr.attr,
1553 &sys_vmcmd_on_halt_attr.attr,
1554 &sys_vmcmd_on_poff_attr.attr,
1555 NULL,
1556};
1557
1558static struct attribute_group vmcmd_attr_group = {
1559 .attrs = vmcmd_attrs,
1560};
1561
1562static struct kset *vmcmd_kset;
1563
1564static void vmcmd_run(struct shutdown_trigger *trigger)
ff6b8ea6 1565{
99ca4e58
MH		 1566 char *cmd, *next_cmd;
1567
1568 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1569 cmd = vmcmd_on_reboot;
1570 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1571 cmd = vmcmd_on_panic;
1572 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1573 cmd = vmcmd_on_halt;
1574 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1575 cmd = vmcmd_on_poff;
1576 else
1577 return;
1578
1579 if (strlen(cmd) == 0)
1580 return;
1581 do {
1582 next_cmd = strchr(cmd, '\n');
1583 if (next_cmd) {
1584 next_cmd[0] = 0;
1585 next_cmd += 1;
1586 }
1587 __cpcmd(cmd, NULL, 0, NULL);
1588 cmd = next_cmd;
1589 } while (cmd != NULL);
1590}
1591
1592static int vmcmd_init(void)
1593{
1594 if (!MACHINE_IS_VM)
b8e660b8 1595 return -EOPNOTSUPP;
99ca4e58
MH		 1596 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1597 if (!vmcmd_kset)
1598 return -ENOMEM;
1599 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1600}
1601
1602static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1603 vmcmd_run, vmcmd_init};
1604
1605/*
1606 * stop shutdown action: Stop Linux on shutdown.
1607 */
1608
1609static void stop_run(struct shutdown_trigger *trigger)
1610{
c6547497
MH		 1611 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1612 disabled_wait((unsigned long) __builtin_return_address(0));
a93b8ec1 1613 while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
f8501ba7
HC		 1614 cpu_relax();
1615 for (;;);
99ca4e58
MH		 1616}
1617
1618static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1619 stop_run, NULL};
1620
1621/* action list */
1622
1623static struct shutdown_action *shutdown_actions_list[] = {
099b7651
FM		 1624 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1625 &vmcmd_action, &stop_action};
99ca4e58
MH		 1626#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1627
1628/*
1629 * Trigger section
1630 */
1631
1632static struct kset *shutdown_actions_kset;
1633
1634static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1635 size_t len)
1636{
1637 int i;
099b7651 1638
99ca4e58 1639 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
099b7651 1640 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
81088819
FM		 1641 if (shutdown_actions_list[i]->init_rc) {
1642 return shutdown_actions_list[i]->init_rc;
1643 } else {
1644 trigger->action = shutdown_actions_list[i];
1645 return len;
1646 }
99ca4e58
MH		 1647 }
1648 }
1649 return -EINVAL;
1650}
1651
1652/* on reipl */
1653
1654static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1655 &reipl_action};
1656
1657static ssize_t on_reboot_show(struct kobject *kobj,
1658 struct kobj_attribute *attr, char *page)
1659{
1660 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1661}
1662
1663static ssize_t on_reboot_store(struct kobject *kobj,
1664 struct kobj_attribute *attr,
1665 const char *buf, size_t len)
1666{
1667 return set_trigger(buf, &on_reboot_trigger, len);
1668}
1669
1670static struct kobj_attribute on_reboot_attr =
1671 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1672
1673static void do_machine_restart(char *__unused)
1674{
1675 smp_send_stop();
1676 on_reboot_trigger.action->fn(&on_reboot_trigger);
1677 reipl_run(NULL);
1678}
1679void (*_machine_restart)(char *command) = do_machine_restart;
1680
1681/* on panic */
1682
1683static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1684
1685static ssize_t on_panic_show(struct kobject *kobj,
1686 struct kobj_attribute *attr, char *page)
1687{
1688 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1689}
1690
1691static ssize_t on_panic_store(struct kobject *kobj,
1692 struct kobj_attribute *attr,
1693 const char *buf, size_t len)
1694{
1695 return set_trigger(buf, &on_panic_trigger, len);
1696}
1697
1698static struct kobj_attribute on_panic_attr =
1699 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1700
1701static void do_panic(void)
1702{
1703 on_panic_trigger.action->fn(&on_panic_trigger);
1704 stop_run(&on_panic_trigger);
1705}
1706
1707/* on halt */
1708
1709static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1710
1711static ssize_t on_halt_show(struct kobject *kobj,
1712 struct kobj_attribute *attr, char *page)
1713{
1714 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1715}
1716
1717static ssize_t on_halt_store(struct kobject *kobj,
1718 struct kobj_attribute *attr,
1719 const char *buf, size_t len)
1720{
1721 return set_trigger(buf, &on_halt_trigger, len);
1722}
1723
1724static struct kobj_attribute on_halt_attr =
1725 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
ff6b8ea6 1726
99ca4e58
MH		 1727
1728static void do_machine_halt(void)
1729{
1730 smp_send_stop();
1731 on_halt_trigger.action->fn(&on_halt_trigger);
1732 stop_run(&on_halt_trigger);
1733}
1734void (*_machine_halt)(void) = do_machine_halt;
1735
1736/* on power off */
1737
1738static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1739
1740static ssize_t on_poff_show(struct kobject *kobj,
1741 struct kobj_attribute *attr, char *page)
1742{
1743 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1744}
1745
1746static ssize_t on_poff_store(struct kobject *kobj,
1747 struct kobj_attribute *attr,
1748 const char *buf, size_t len)
1749{
1750 return set_trigger(buf, &on_poff_trigger, len);
1751}
1752
1753static struct kobj_attribute on_poff_attr =
1754 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1755
1756
1757static void do_machine_power_off(void)
1758{
1759 smp_send_stop();
1760 on_poff_trigger.action->fn(&on_poff_trigger);
1761 stop_run(&on_poff_trigger);
1762}
1763void (*_machine_power_off)(void) = do_machine_power_off;
1764
1765static void __init shutdown_triggers_init(void)
1766{
d91885be 1767 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
f62ed9e3 1768 firmware_kobj);
d91885be 1769 if (!shutdown_actions_kset)
99ca4e58
MH		 1770 goto fail;
1771 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1772 &on_reboot_attr.attr))
1773 goto fail;
1774 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1775 &on_panic_attr.attr))
1776 goto fail;
1777 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1778 &on_halt_attr.attr))
1779 goto fail;
1780 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1781 &on_poff_attr.attr))
1782 goto fail;
1783
1784 return;
1785fail:
1786 panic("shutdown_triggers_init failed\n");
1787}
1788
1789static void __init shutdown_actions_init(void)
1790{
1791 int i;
1792
1793 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1794 if (!shutdown_actions_list[i]->init)
1795 continue;
81088819
FM		 1796 shutdown_actions_list[i]->init_rc =
1797 shutdown_actions_list[i]->init();
ff6b8ea6 1798 }
ff6b8ea6
MH		 1799}
1800
1801static int __init s390_ipl_init(void)
1802{
d09293ae 1803 sclp_get_ipl_info(&sclp_ipl_info);
99ca4e58
MH		 1804 shutdown_actions_init();
1805 shutdown_triggers_init();
ff6b8ea6
MH		 1806 return 0;
1807}
1808
1809__initcall(s390_ipl_init);
15e9b586 1810
99ca4e58
MH		 1811static void __init strncpy_skip_quote(char *dst, char *src, int n)
1812{
1813 int sx, dx;
1814
1815 dx = 0;
1816 for (sx = 0; src[sx] != 0; sx++) {
1817 if (src[sx] == '"')
1818 continue;
1819 dst[dx++] = src[sx];
1820 if (dx >= n)
1821 break;
1822 }
1823}
1824
1825static int __init vmcmd_on_reboot_setup(char *str)
1826{
1827 if (!MACHINE_IS_VM)
1828 return 1;
1829 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1830 vmcmd_on_reboot[127] = 0;
1831 on_reboot_trigger.action = &vmcmd_action;
1832 return 1;
1833}
1834__setup("vmreboot=", vmcmd_on_reboot_setup);
1835
1836static int __init vmcmd_on_panic_setup(char *str)
1837{
1838 if (!MACHINE_IS_VM)
1839 return 1;
1840 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1841 vmcmd_on_panic[127] = 0;
1842 on_panic_trigger.action = &vmcmd_action;
1843 return 1;
1844}
1845__setup("vmpanic=", vmcmd_on_panic_setup);
1846
1847static int __init vmcmd_on_halt_setup(char *str)
1848{
1849 if (!MACHINE_IS_VM)
1850 return 1;
1851 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1852 vmcmd_on_halt[127] = 0;
1853 on_halt_trigger.action = &vmcmd_action;
1854 return 1;
1855}
1856__setup("vmhalt=", vmcmd_on_halt_setup);
1857
1858static int __init vmcmd_on_poff_setup(char *str)
1859{
1860 if (!MACHINE_IS_VM)
1861 return 1;
1862 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1863 vmcmd_on_poff[127] = 0;
1864 on_poff_trigger.action = &vmcmd_action;
1865 return 1;
1866}
1867__setup("vmpoff=", vmcmd_on_poff_setup);
1868
1869static int on_panic_notify(struct notifier_block *self,
1870 unsigned long event, void *data)
1871{
1872 do_panic();
1873 return NOTIFY_OK;
1874}
1875
1876static struct notifier_block on_panic_nb = {
1877 .notifier_call = on_panic_notify,
7e9b580e 1878 .priority = INT_MIN,
99ca4e58
MH		 1879};
1880
1881void __init setup_ipl(void)
1882{
1883 ipl_info.type = get_ipl_type();
1884 switch (ipl_info.type) {
1885 case IPL_TYPE_CCW:
1886 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1887 ipl_info.data.ccw.dev_id.ssid = 0;
1888 break;
1889 case IPL_TYPE_FCP:
1890 case IPL_TYPE_FCP_DUMP:
1891 ipl_info.data.fcp.dev_id.devno =
1892 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1893 ipl_info.data.fcp.dev_id.ssid = 0;
1894 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1895 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1896 break;
1897 case IPL_TYPE_NSS:
1898 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1899 sizeof(ipl_info.data.nss.name));
1900 break;
1901 case IPL_TYPE_UNKNOWN:
99ca4e58
MH		 1902 /* We have no info to copy */
1903 break;
1904 }
1905 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1906}
1907
a0443fbb
HB		 1908void __init ipl_update_parameters(void)
1909{
3a95e8eb
MH		 1910 int rc;
1911
1912 rc = diag308(DIAG308_STORE, &ipl_block);
1913 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
a0443fbb
HB		 1914 diag308_set_works = 1;
1915}
1916
6fc321fd
HC		 1917void __init ipl_save_parameters(void)
1918{
1919 struct cio_iplinfo iplinfo;
6fc321fd
HC		 1920 void *src, *dst;
1921
1922 if (cio_get_iplinfo(&iplinfo))
1923 return;
1924
1925 ipl_devno = iplinfo.devno;
1926 ipl_flags |= IPL_DEVNO_VALID;
1927 if (!iplinfo.is_qdio)
1928 return;
1929 ipl_flags |= IPL_PARMBLOCK_VALID;
cbb870c8 1930 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
6fc321fd
HC		 1931 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1932 memmove(dst, src, PAGE_SIZE);
cbb870c8 1933 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
6fc321fd
HC		 1934}
1935
15e9b586
HC		 1936static LIST_HEAD(rcall);
1937static DEFINE_MUTEX(rcall_mutex);
1938
1939void register_reset_call(struct reset_call *reset)
1940{
1941 mutex_lock(&rcall_mutex);
1942 list_add(&reset->list, &rcall);
1943 mutex_unlock(&rcall_mutex);
1944}
1945EXPORT_SYMBOL_GPL(register_reset_call);
1946
1947void unregister_reset_call(struct reset_call *reset)
1948{
1949 mutex_lock(&rcall_mutex);
1950 list_del(&reset->list);
1951 mutex_unlock(&rcall_mutex);
1952}
1953EXPORT_SYMBOL_GPL(unregister_reset_call);
1954
1955static void do_reset_calls(void)
1956{
1957 struct reset_call *reset;
1958
1959 list_for_each_entry(reset, &rcall, list)
1960 reset->fn();
1961}
1962
c5dd8586 1963u32 dump_prefix_page;
15e9b586
HC		 1964
1965void s390_reset_system(void)
1966{
1967 struct _lowcore *lc;
1968
15e9b586 1969 lc = (struct _lowcore *)(unsigned long) store_prefix();
a45e1414
MH		 1970
1971 /* Stack for interrupt/machine check handler */
15e9b586
HC		 1972 lc->panic_stack = S390_lowcore.panic_stack;
1973
da1cf23e 1974 /* Save prefix page address for dump case */
c5dd8586 1975 dump_prefix_page = (u32)(unsigned long) lc;
da1cf23e 1976
15e9b586
HC		 1977 /* Disable prefixing */
1978 set_prefix(0);
1979
1980 /* Disable lowcore protection */
1981 __ctl_clear_bit(0,28);
1982
1983 /* Set new machine check handler */
c1821c2e 1984 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
15e9b586 1985 S390_lowcore.mcck_new_psw.addr =
ab14de6c 1986 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
a45e1414
MH		 1987
1988 /* Set new program check handler */
c1821c2e 1989 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
a45e1414 1990 S390_lowcore.program_new_psw.addr =
ab14de6c 1991 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
a45e1414 1992
15e9b586
HC		 1993 do_reset_calls();
1994}
99ca4e58 1995
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