[SCSI] bnx2i: Fixed the endian on TTT for NOP out transmission
[linux-2.6.git] / arch / s390 / kernel / ipl.c
1 /*
2  *  arch/s390/kernel/ipl.c
3  *    ipl/reipl/dump support for Linux on s390.
4  *
5  *    Copyright IBM Corp. 2005,2007
6  *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
7  *               Heiko Carstens <heiko.carstens@de.ibm.com>
8  *               Volker Sameske <sameske@de.ibm.com>
9  */
10
11 #include <linux/types.h>
12 #include <linux/module.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
17 #include <linux/fs.h>
18 #include <linux/gfp.h>
19 #include <asm/ipl.h>
20 #include <asm/smp.h>
21 #include <asm/setup.h>
22 #include <asm/cpcmd.h>
23 #include <asm/cio.h>
24 #include <asm/ebcdic.h>
25 #include <asm/reset.h>
26 #include <asm/sclp.h>
27 #include <asm/sigp.h>
28 #include <asm/checksum.h>
29
30 #define IPL_PARM_BLOCK_VERSION 0
31
32 #define IPL_UNKNOWN_STR         "unknown"
33 #define IPL_CCW_STR             "ccw"
34 #define IPL_FCP_STR             "fcp"
35 #define IPL_FCP_DUMP_STR        "fcp_dump"
36 #define IPL_NSS_STR             "nss"
37
38 #define DUMP_CCW_STR            "ccw"
39 #define DUMP_FCP_STR            "fcp"
40 #define DUMP_NONE_STR           "none"
41
42 /*
43  * Four shutdown trigger types are supported:
44  * - panic
45  * - halt
46  * - power off
47  * - reipl
48  * - restart
49  */
50 #define ON_PANIC_STR            "on_panic"
51 #define ON_HALT_STR             "on_halt"
52 #define ON_POFF_STR             "on_poff"
53 #define ON_REIPL_STR            "on_reboot"
54 #define ON_RESTART_STR          "on_restart"
55
56 struct shutdown_action;
57 struct shutdown_trigger {
58         char *name;
59         struct shutdown_action *action;
60 };
61
62 /*
63  * The following shutdown action types are supported:
64  */
65 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
66 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
67 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
68 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
69 #define SHUTDOWN_ACTION_STOP_STR        "stop"
70 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
71
72 struct shutdown_action {
73         char *name;
74         void (*fn) (struct shutdown_trigger *trigger);
75         int (*init) (void);
76         int init_rc;
77 };
78
79 static char *ipl_type_str(enum ipl_type type)
80 {
81         switch (type) {
82         case IPL_TYPE_CCW:
83                 return IPL_CCW_STR;
84         case IPL_TYPE_FCP:
85                 return IPL_FCP_STR;
86         case IPL_TYPE_FCP_DUMP:
87                 return IPL_FCP_DUMP_STR;
88         case IPL_TYPE_NSS:
89                 return IPL_NSS_STR;
90         case IPL_TYPE_UNKNOWN:
91         default:
92                 return IPL_UNKNOWN_STR;
93         }
94 }
95
96 enum dump_type {
97         DUMP_TYPE_NONE  = 1,
98         DUMP_TYPE_CCW   = 2,
99         DUMP_TYPE_FCP   = 4,
100 };
101
102 static char *dump_type_str(enum dump_type type)
103 {
104         switch (type) {
105         case DUMP_TYPE_NONE:
106                 return DUMP_NONE_STR;
107         case DUMP_TYPE_CCW:
108                 return DUMP_CCW_STR;
109         case DUMP_TYPE_FCP:
110                 return DUMP_FCP_STR;
111         default:
112                 return NULL;
113         }
114 }
115
116 /*
117  * Must be in data section since the bss section
118  * is not cleared when these are accessed.
119  */
120 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
121 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
122
123 enum ipl_method {
124         REIPL_METHOD_CCW_CIO,
125         REIPL_METHOD_CCW_DIAG,
126         REIPL_METHOD_CCW_VM,
127         REIPL_METHOD_FCP_RO_DIAG,
128         REIPL_METHOD_FCP_RW_DIAG,
129         REIPL_METHOD_FCP_RO_VM,
130         REIPL_METHOD_FCP_DUMP,
131         REIPL_METHOD_NSS,
132         REIPL_METHOD_NSS_DIAG,
133         REIPL_METHOD_DEFAULT,
134 };
135
136 enum dump_method {
137         DUMP_METHOD_NONE,
138         DUMP_METHOD_CCW_CIO,
139         DUMP_METHOD_CCW_DIAG,
140         DUMP_METHOD_CCW_VM,
141         DUMP_METHOD_FCP_DIAG,
142 };
143
144 static int diag308_set_works = 0;
145
146 static struct ipl_parameter_block ipl_block;
147
148 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
149
150 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
151 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
152 static struct ipl_parameter_block *reipl_block_fcp;
153 static struct ipl_parameter_block *reipl_block_ccw;
154 static struct ipl_parameter_block *reipl_block_nss;
155 static struct ipl_parameter_block *reipl_block_actual;
156
157 static int dump_capabilities = DUMP_TYPE_NONE;
158 static enum dump_type dump_type = DUMP_TYPE_NONE;
159 static enum dump_method dump_method = DUMP_METHOD_NONE;
160 static struct ipl_parameter_block *dump_block_fcp;
161 static struct ipl_parameter_block *dump_block_ccw;
162
163 static struct sclp_ipl_info sclp_ipl_info;
164
165 int diag308(unsigned long subcode, void *addr)
166 {
167         register unsigned long _addr asm("0") = (unsigned long) addr;
168         register unsigned long _rc asm("1") = 0;
169
170         asm volatile(
171                 "       diag    %0,%2,0x308\n"
172                 "0:\n"
173                 EX_TABLE(0b,0b)
174                 : "+d" (_addr), "+d" (_rc)
175                 : "d" (subcode) : "cc", "memory");
176         return _rc;
177 }
178 EXPORT_SYMBOL_GPL(diag308);
179
180 /* SYSFS */
181
182 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
183 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
184                 struct kobj_attribute *attr,                            \
185                 char *page)                                             \
186 {                                                                       \
187         return sprintf(page, _format, _value);                          \
188 }                                                                       \
189 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
190         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
191
192 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
193 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
194                 struct kobj_attribute *attr,                            \
195                 char *page)                                             \
196 {                                                                       \
197         return sprintf(page, _fmt_out,                                  \
198                         (unsigned long long) _value);                   \
199 }                                                                       \
200 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
201                 struct kobj_attribute *attr,                            \
202                 const char *buf, size_t len)                            \
203 {                                                                       \
204         unsigned long long value;                                       \
205         if (sscanf(buf, _fmt_in, &value) != 1)                          \
206                 return -EINVAL;                                         \
207         _value = value;                                                 \
208         return len;                                                     \
209 }                                                                       \
210 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
211         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
212                         sys_##_prefix##_##_name##_show,                 \
213                         sys_##_prefix##_##_name##_store);
214
215 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
216 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
217                 struct kobj_attribute *attr,                            \
218                 char *page)                                             \
219 {                                                                       \
220         return sprintf(page, _fmt_out, _value);                         \
221 }                                                                       \
222 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
223                 struct kobj_attribute *attr,                            \
224                 const char *buf, size_t len)                            \
225 {                                                                       \
226         strncpy(_value, buf, sizeof(_value) - 1);                       \
227         strim(_value);                                                  \
228         return len;                                                     \
229 }                                                                       \
230 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
231         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
232                         sys_##_prefix##_##_name##_show,                 \
233                         sys_##_prefix##_##_name##_store);
234
235 static void make_attrs_ro(struct attribute **attrs)
236 {
237         while (*attrs) {
238                 (*attrs)->mode = S_IRUGO;
239                 attrs++;
240         }
241 }
242
243 /*
244  * ipl section
245  */
246
247 static __init enum ipl_type get_ipl_type(void)
248 {
249         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
250
251         if (ipl_flags & IPL_NSS_VALID)
252                 return IPL_TYPE_NSS;
253         if (!(ipl_flags & IPL_DEVNO_VALID))
254                 return IPL_TYPE_UNKNOWN;
255         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
256                 return IPL_TYPE_CCW;
257         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
258                 return IPL_TYPE_UNKNOWN;
259         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
260                 return IPL_TYPE_UNKNOWN;
261         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
262                 return IPL_TYPE_FCP_DUMP;
263         return IPL_TYPE_FCP;
264 }
265
266 struct ipl_info ipl_info;
267 EXPORT_SYMBOL_GPL(ipl_info);
268
269 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
270                              char *page)
271 {
272         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
273 }
274
275 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
276
277 /* VM IPL PARM routines */
278 size_t reipl_get_ascii_vmparm(char *dest, size_t size,
279                                    const struct ipl_parameter_block *ipb)
280 {
281         int i;
282         size_t len;
283         char has_lowercase = 0;
284
285         len = 0;
286         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
287             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
288
289                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
290                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
291                 /* If at least one character is lowercase, we assume mixed
292                  * case; otherwise we convert everything to lowercase.
293                  */
294                 for (i = 0; i < len; i++)
295                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
296                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
297                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
298                                 has_lowercase = 1;
299                                 break;
300                         }
301                 if (!has_lowercase)
302                         EBC_TOLOWER(dest, len);
303                 EBCASC(dest, len);
304         }
305         dest[len] = 0;
306
307         return len;
308 }
309
310 size_t append_ipl_vmparm(char *dest, size_t size)
311 {
312         size_t rc;
313
314         rc = 0;
315         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
316                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
317         else
318                 dest[0] = 0;
319         return rc;
320 }
321
322 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
323                                 struct kobj_attribute *attr, char *page)
324 {
325         char parm[DIAG308_VMPARM_SIZE + 1] = {};
326
327         append_ipl_vmparm(parm, sizeof(parm));
328         return sprintf(page, "%s\n", parm);
329 }
330
331 static size_t scpdata_length(const char* buf, size_t count)
332 {
333         while (count) {
334                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
335                         break;
336                 count--;
337         }
338         return count;
339 }
340
341 size_t reipl_append_ascii_scpdata(char *dest, size_t size,
342                                   const struct ipl_parameter_block *ipb)
343 {
344         size_t count;
345         size_t i;
346         int has_lowercase;
347
348         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
349                                              ipb->ipl_info.fcp.scp_data_len));
350         if (!count)
351                 goto out;
352
353         has_lowercase = 0;
354         for (i = 0; i < count; i++) {
355                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
356                         count = 0;
357                         goto out;
358                 }
359                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
360                         has_lowercase = 1;
361         }
362
363         if (has_lowercase)
364                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
365         else
366                 for (i = 0; i < count; i++)
367                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
368 out:
369         dest[count] = '\0';
370         return count;
371 }
372
373 size_t append_ipl_scpdata(char *dest, size_t len)
374 {
375         size_t rc;
376
377         rc = 0;
378         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
379                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
380         else
381                 dest[0] = 0;
382         return rc;
383 }
384
385
386 static struct kobj_attribute sys_ipl_vm_parm_attr =
387         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
388
389 static ssize_t sys_ipl_device_show(struct kobject *kobj,
390                                    struct kobj_attribute *attr, char *page)
391 {
392         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
393
394         switch (ipl_info.type) {
395         case IPL_TYPE_CCW:
396                 return sprintf(page, "0.0.%04x\n", ipl_devno);
397         case IPL_TYPE_FCP:
398         case IPL_TYPE_FCP_DUMP:
399                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
400         default:
401                 return 0;
402         }
403 }
404
405 static struct kobj_attribute sys_ipl_device_attr =
406         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
407
408 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
409                                   struct bin_attribute *attr, char *buf,
410                                   loff_t off, size_t count)
411 {
412         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
413                                         IPL_PARMBLOCK_SIZE);
414 }
415
416 static struct bin_attribute ipl_parameter_attr = {
417         .attr = {
418                 .name = "binary_parameter",
419                 .mode = S_IRUGO,
420         },
421         .size = PAGE_SIZE,
422         .read = &ipl_parameter_read,
423 };
424
425 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
426                                  struct bin_attribute *attr, char *buf,
427                                  loff_t off, size_t count)
428 {
429         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
430         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
431
432         return memory_read_from_buffer(buf, count, &off, scp_data, size);
433 }
434
435 static struct bin_attribute ipl_scp_data_attr = {
436         .attr = {
437                 .name = "scp_data",
438                 .mode = S_IRUGO,
439         },
440         .size = PAGE_SIZE,
441         .read = ipl_scp_data_read,
442 };
443
444 /* FCP ipl device attributes */
445
446 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
447                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
448 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
449                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
450 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
451                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
452 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
453                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
454
455 static struct attribute *ipl_fcp_attrs[] = {
456         &sys_ipl_type_attr.attr,
457         &sys_ipl_device_attr.attr,
458         &sys_ipl_fcp_wwpn_attr.attr,
459         &sys_ipl_fcp_lun_attr.attr,
460         &sys_ipl_fcp_bootprog_attr.attr,
461         &sys_ipl_fcp_br_lba_attr.attr,
462         NULL,
463 };
464
465 static struct attribute_group ipl_fcp_attr_group = {
466         .attrs = ipl_fcp_attrs,
467 };
468
469 /* CCW ipl device attributes */
470
471 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
472                                      struct kobj_attribute *attr, char *page)
473 {
474         char loadparm[LOADPARM_LEN + 1] = {};
475
476         if (!sclp_ipl_info.is_valid)
477                 return sprintf(page, "#unknown#\n");
478         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
479         EBCASC(loadparm, LOADPARM_LEN);
480         strim(loadparm);
481         return sprintf(page, "%s\n", loadparm);
482 }
483
484 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
485         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
486
487 static struct attribute *ipl_ccw_attrs_vm[] = {
488         &sys_ipl_type_attr.attr,
489         &sys_ipl_device_attr.attr,
490         &sys_ipl_ccw_loadparm_attr.attr,
491         &sys_ipl_vm_parm_attr.attr,
492         NULL,
493 };
494
495 static struct attribute *ipl_ccw_attrs_lpar[] = {
496         &sys_ipl_type_attr.attr,
497         &sys_ipl_device_attr.attr,
498         &sys_ipl_ccw_loadparm_attr.attr,
499         NULL,
500 };
501
502 static struct attribute_group ipl_ccw_attr_group_vm = {
503         .attrs = ipl_ccw_attrs_vm,
504 };
505
506 static struct attribute_group ipl_ccw_attr_group_lpar = {
507         .attrs = ipl_ccw_attrs_lpar
508 };
509
510 /* NSS ipl device attributes */
511
512 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
513
514 static struct attribute *ipl_nss_attrs[] = {
515         &sys_ipl_type_attr.attr,
516         &sys_ipl_nss_name_attr.attr,
517         &sys_ipl_ccw_loadparm_attr.attr,
518         &sys_ipl_vm_parm_attr.attr,
519         NULL,
520 };
521
522 static struct attribute_group ipl_nss_attr_group = {
523         .attrs = ipl_nss_attrs,
524 };
525
526 /* UNKNOWN ipl device attributes */
527
528 static struct attribute *ipl_unknown_attrs[] = {
529         &sys_ipl_type_attr.attr,
530         NULL,
531 };
532
533 static struct attribute_group ipl_unknown_attr_group = {
534         .attrs = ipl_unknown_attrs,
535 };
536
537 static struct kset *ipl_kset;
538
539 static int __init ipl_register_fcp_files(void)
540 {
541         int rc;
542
543         rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
544         if (rc)
545                 goto out;
546         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
547         if (rc)
548                 goto out_ipl_parm;
549         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
550         if (!rc)
551                 goto out;
552
553         sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
554
555 out_ipl_parm:
556         sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
557 out:
558         return rc;
559 }
560
561 static void __ipl_run(void *unused)
562 {
563         diag308(DIAG308_IPL, NULL);
564         if (MACHINE_IS_VM)
565                 __cpcmd("IPL", NULL, 0, NULL);
566         else if (ipl_info.type == IPL_TYPE_CCW)
567                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
568 }
569
570 static void ipl_run(struct shutdown_trigger *trigger)
571 {
572         smp_switch_to_ipl_cpu(__ipl_run, NULL);
573 }
574
575 static int __init ipl_init(void)
576 {
577         int rc;
578
579         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
580         if (!ipl_kset) {
581                 rc = -ENOMEM;
582                 goto out;
583         }
584         switch (ipl_info.type) {
585         case IPL_TYPE_CCW:
586                 if (MACHINE_IS_VM)
587                         rc = sysfs_create_group(&ipl_kset->kobj,
588                                                 &ipl_ccw_attr_group_vm);
589                 else
590                         rc = sysfs_create_group(&ipl_kset->kobj,
591                                                 &ipl_ccw_attr_group_lpar);
592                 break;
593         case IPL_TYPE_FCP:
594         case IPL_TYPE_FCP_DUMP:
595                 rc = ipl_register_fcp_files();
596                 break;
597         case IPL_TYPE_NSS:
598                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
599                 break;
600         default:
601                 rc = sysfs_create_group(&ipl_kset->kobj,
602                                         &ipl_unknown_attr_group);
603                 break;
604         }
605 out:
606         if (rc)
607                 panic("ipl_init failed: rc = %i\n", rc);
608
609         return 0;
610 }
611
612 static struct shutdown_action __refdata ipl_action = {
613         .name   = SHUTDOWN_ACTION_IPL_STR,
614         .fn     = ipl_run,
615         .init   = ipl_init,
616 };
617
618 /*
619  * reipl shutdown action: Reboot Linux on shutdown.
620  */
621
622 /* VM IPL PARM attributes */
623 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
624                                           char *page)
625 {
626         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
627
628         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
629         return sprintf(page, "%s\n", vmparm);
630 }
631
632 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
633                                           size_t vmparm_max,
634                                           const char *buf, size_t len)
635 {
636         int i, ip_len;
637
638         /* ignore trailing newline */
639         ip_len = len;
640         if ((len > 0) && (buf[len - 1] == '\n'))
641                 ip_len--;
642
643         if (ip_len > vmparm_max)
644                 return -EINVAL;
645
646         /* parm is used to store kernel options, check for common chars */
647         for (i = 0; i < ip_len; i++)
648                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
649                         return -EINVAL;
650
651         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
652         ipb->ipl_info.ccw.vm_parm_len = ip_len;
653         if (ip_len > 0) {
654                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
655                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
656                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
657         } else {
658                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
659         }
660
661         return len;
662 }
663
664 /* NSS wrapper */
665 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
666                                      struct kobj_attribute *attr, char *page)
667 {
668         return reipl_generic_vmparm_show(reipl_block_nss, page);
669 }
670
671 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
672                                       struct kobj_attribute *attr,
673                                       const char *buf, size_t len)
674 {
675         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
676 }
677
678 /* CCW wrapper */
679 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
680                                      struct kobj_attribute *attr, char *page)
681 {
682         return reipl_generic_vmparm_show(reipl_block_ccw, page);
683 }
684
685 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
686                                       struct kobj_attribute *attr,
687                                       const char *buf, size_t len)
688 {
689         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
690 }
691
692 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
693         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
694                                         reipl_nss_vmparm_store);
695 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
696         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
697                                         reipl_ccw_vmparm_store);
698
699 /* FCP reipl device attributes */
700
701 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
702                                       struct bin_attribute *attr,
703                                       char *buf, loff_t off, size_t count)
704 {
705         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
706         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
707
708         return memory_read_from_buffer(buf, count, &off, scp_data, size);
709 }
710
711 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
712                                        struct bin_attribute *attr,
713                                        char *buf, loff_t off, size_t count)
714 {
715         size_t padding;
716         size_t scpdata_len;
717
718         if (off < 0)
719                 return -EINVAL;
720
721         if (off >= DIAG308_SCPDATA_SIZE)
722                 return -ENOSPC;
723
724         if (count > DIAG308_SCPDATA_SIZE - off)
725                 count = DIAG308_SCPDATA_SIZE - off;
726
727         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
728         scpdata_len = off + count;
729
730         if (scpdata_len % 8) {
731                 padding = 8 - (scpdata_len % 8);
732                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
733                        0, padding);
734                 scpdata_len += padding;
735         }
736
737         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
738         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
739         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
740
741         return count;
742 }
743
744 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
745         .attr = {
746                 .name = "scp_data",
747                 .mode = S_IRUGO | S_IWUSR,
748         },
749         .size = PAGE_SIZE,
750         .read = reipl_fcp_scpdata_read,
751         .write = reipl_fcp_scpdata_write,
752 };
753
754 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
755                    reipl_block_fcp->ipl_info.fcp.wwpn);
756 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
757                    reipl_block_fcp->ipl_info.fcp.lun);
758 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
759                    reipl_block_fcp->ipl_info.fcp.bootprog);
760 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
761                    reipl_block_fcp->ipl_info.fcp.br_lba);
762 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
763                    reipl_block_fcp->ipl_info.fcp.devno);
764
765 static struct attribute *reipl_fcp_attrs[] = {
766         &sys_reipl_fcp_device_attr.attr,
767         &sys_reipl_fcp_wwpn_attr.attr,
768         &sys_reipl_fcp_lun_attr.attr,
769         &sys_reipl_fcp_bootprog_attr.attr,
770         &sys_reipl_fcp_br_lba_attr.attr,
771         NULL,
772 };
773
774 static struct attribute_group reipl_fcp_attr_group = {
775         .attrs = reipl_fcp_attrs,
776 };
777
778 /* CCW reipl device attributes */
779
780 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
781         reipl_block_ccw->ipl_info.ccw.devno);
782
783 static void reipl_get_ascii_loadparm(char *loadparm,
784                                      struct ipl_parameter_block *ibp)
785 {
786         memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
787         EBCASC(loadparm, LOADPARM_LEN);
788         loadparm[LOADPARM_LEN] = 0;
789         strim(loadparm);
790 }
791
792 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
793                                            char *page)
794 {
795         char buf[LOADPARM_LEN + 1];
796
797         reipl_get_ascii_loadparm(buf, ipb);
798         return sprintf(page, "%s\n", buf);
799 }
800
801 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
802                                             const char *buf, size_t len)
803 {
804         int i, lp_len;
805
806         /* ignore trailing newline */
807         lp_len = len;
808         if ((len > 0) && (buf[len - 1] == '\n'))
809                 lp_len--;
810         /* loadparm can have max 8 characters and must not start with a blank */
811         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
812                 return -EINVAL;
813         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
814         for (i = 0; i < lp_len; i++) {
815                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
816                     (buf[i] == '.'))
817                         continue;
818                 return -EINVAL;
819         }
820         /* initialize loadparm with blanks */
821         memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
822         /* copy and convert to ebcdic */
823         memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
824         ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
825         return len;
826 }
827
828 /* NSS wrapper */
829 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
830                                        struct kobj_attribute *attr, char *page)
831 {
832         return reipl_generic_loadparm_show(reipl_block_nss, page);
833 }
834
835 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
836                                         struct kobj_attribute *attr,
837                                         const char *buf, size_t len)
838 {
839         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
840 }
841
842 /* CCW wrapper */
843 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
844                                        struct kobj_attribute *attr, char *page)
845 {
846         return reipl_generic_loadparm_show(reipl_block_ccw, page);
847 }
848
849 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
850                                         struct kobj_attribute *attr,
851                                         const char *buf, size_t len)
852 {
853         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
854 }
855
856 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
857         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
858                                             reipl_ccw_loadparm_store);
859
860 static struct attribute *reipl_ccw_attrs_vm[] = {
861         &sys_reipl_ccw_device_attr.attr,
862         &sys_reipl_ccw_loadparm_attr.attr,
863         &sys_reipl_ccw_vmparm_attr.attr,
864         NULL,
865 };
866
867 static struct attribute *reipl_ccw_attrs_lpar[] = {
868         &sys_reipl_ccw_device_attr.attr,
869         &sys_reipl_ccw_loadparm_attr.attr,
870         NULL,
871 };
872
873 static struct attribute_group reipl_ccw_attr_group_vm = {
874         .name  = IPL_CCW_STR,
875         .attrs = reipl_ccw_attrs_vm,
876 };
877
878 static struct attribute_group reipl_ccw_attr_group_lpar = {
879         .name  = IPL_CCW_STR,
880         .attrs = reipl_ccw_attrs_lpar,
881 };
882
883
884 /* NSS reipl device attributes */
885 static void reipl_get_ascii_nss_name(char *dst,
886                                      struct ipl_parameter_block *ipb)
887 {
888         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
889         EBCASC(dst, NSS_NAME_SIZE);
890         dst[NSS_NAME_SIZE] = 0;
891 }
892
893 static ssize_t reipl_nss_name_show(struct kobject *kobj,
894                                    struct kobj_attribute *attr, char *page)
895 {
896         char nss_name[NSS_NAME_SIZE + 1] = {};
897
898         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
899         return sprintf(page, "%s\n", nss_name);
900 }
901
902 static ssize_t reipl_nss_name_store(struct kobject *kobj,
903                                     struct kobj_attribute *attr,
904                                     const char *buf, size_t len)
905 {
906         int nss_len;
907
908         /* ignore trailing newline */
909         nss_len = len;
910         if ((len > 0) && (buf[len - 1] == '\n'))
911                 nss_len--;
912
913         if (nss_len > NSS_NAME_SIZE)
914                 return -EINVAL;
915
916         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
917         if (nss_len > 0) {
918                 reipl_block_nss->ipl_info.ccw.vm_flags |=
919                         DIAG308_VM_FLAGS_NSS_VALID;
920                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
921                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
922                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
923         } else {
924                 reipl_block_nss->ipl_info.ccw.vm_flags &=
925                         ~DIAG308_VM_FLAGS_NSS_VALID;
926         }
927
928         return len;
929 }
930
931 static struct kobj_attribute sys_reipl_nss_name_attr =
932         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
933                                         reipl_nss_name_store);
934
935 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
936         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
937                                             reipl_nss_loadparm_store);
938
939 static struct attribute *reipl_nss_attrs[] = {
940         &sys_reipl_nss_name_attr.attr,
941         &sys_reipl_nss_loadparm_attr.attr,
942         &sys_reipl_nss_vmparm_attr.attr,
943         NULL,
944 };
945
946 static struct attribute_group reipl_nss_attr_group = {
947         .name  = IPL_NSS_STR,
948         .attrs = reipl_nss_attrs,
949 };
950
951 /* reipl type */
952
953 static int reipl_set_type(enum ipl_type type)
954 {
955         if (!(reipl_capabilities & type))
956                 return -EINVAL;
957
958         switch(type) {
959         case IPL_TYPE_CCW:
960                 if (diag308_set_works)
961                         reipl_method = REIPL_METHOD_CCW_DIAG;
962                 else if (MACHINE_IS_VM)
963                         reipl_method = REIPL_METHOD_CCW_VM;
964                 else
965                         reipl_method = REIPL_METHOD_CCW_CIO;
966                 reipl_block_actual = reipl_block_ccw;
967                 break;
968         case IPL_TYPE_FCP:
969                 if (diag308_set_works)
970                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
971                 else if (MACHINE_IS_VM)
972                         reipl_method = REIPL_METHOD_FCP_RO_VM;
973                 else
974                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
975                 reipl_block_actual = reipl_block_fcp;
976                 break;
977         case IPL_TYPE_FCP_DUMP:
978                 reipl_method = REIPL_METHOD_FCP_DUMP;
979                 break;
980         case IPL_TYPE_NSS:
981                 if (diag308_set_works)
982                         reipl_method = REIPL_METHOD_NSS_DIAG;
983                 else
984                         reipl_method = REIPL_METHOD_NSS;
985                 reipl_block_actual = reipl_block_nss;
986                 break;
987         case IPL_TYPE_UNKNOWN:
988                 reipl_method = REIPL_METHOD_DEFAULT;
989                 break;
990         default:
991                 BUG();
992         }
993         reipl_type = type;
994         return 0;
995 }
996
997 static ssize_t reipl_type_show(struct kobject *kobj,
998                                struct kobj_attribute *attr, char *page)
999 {
1000         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1001 }
1002
1003 static ssize_t reipl_type_store(struct kobject *kobj,
1004                                 struct kobj_attribute *attr,
1005                                 const char *buf, size_t len)
1006 {
1007         int rc = -EINVAL;
1008
1009         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1010                 rc = reipl_set_type(IPL_TYPE_CCW);
1011         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1012                 rc = reipl_set_type(IPL_TYPE_FCP);
1013         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1014                 rc = reipl_set_type(IPL_TYPE_NSS);
1015         return (rc != 0) ? rc : len;
1016 }
1017
1018 static struct kobj_attribute reipl_type_attr =
1019         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1020
1021 static struct kset *reipl_kset;
1022 static struct kset *reipl_fcp_kset;
1023
1024 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1025                            const enum ipl_method m)
1026 {
1027         char loadparm[LOADPARM_LEN + 1] = {};
1028         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1029         char nss_name[NSS_NAME_SIZE + 1] = {};
1030         size_t pos = 0;
1031
1032         reipl_get_ascii_loadparm(loadparm, ipb);
1033         reipl_get_ascii_nss_name(nss_name, ipb);
1034         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1035
1036         switch (m) {
1037         case REIPL_METHOD_CCW_VM:
1038                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1039                 break;
1040         case REIPL_METHOD_NSS:
1041                 pos = sprintf(dst, "IPL %s", nss_name);
1042                 break;
1043         default:
1044                 break;
1045         }
1046         if (strlen(loadparm) > 0)
1047                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1048         if (strlen(vmparm) > 0)
1049                 sprintf(dst + pos, " PARM %s", vmparm);
1050 }
1051
1052 static void __reipl_run(void *unused)
1053 {
1054         struct ccw_dev_id devid;
1055         static char buf[128];
1056
1057         switch (reipl_method) {
1058         case REIPL_METHOD_CCW_CIO:
1059                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1060                 devid.ssid  = 0;
1061                 reipl_ccw_dev(&devid);
1062                 break;
1063         case REIPL_METHOD_CCW_VM:
1064                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1065                 __cpcmd(buf, NULL, 0, NULL);
1066                 break;
1067         case REIPL_METHOD_CCW_DIAG:
1068                 diag308(DIAG308_SET, reipl_block_ccw);
1069                 diag308(DIAG308_IPL, NULL);
1070                 break;
1071         case REIPL_METHOD_FCP_RW_DIAG:
1072                 diag308(DIAG308_SET, reipl_block_fcp);
1073                 diag308(DIAG308_IPL, NULL);
1074                 break;
1075         case REIPL_METHOD_FCP_RO_DIAG:
1076                 diag308(DIAG308_IPL, NULL);
1077                 break;
1078         case REIPL_METHOD_FCP_RO_VM:
1079                 __cpcmd("IPL", NULL, 0, NULL);
1080                 break;
1081         case REIPL_METHOD_NSS_DIAG:
1082                 diag308(DIAG308_SET, reipl_block_nss);
1083                 diag308(DIAG308_IPL, NULL);
1084                 break;
1085         case REIPL_METHOD_NSS:
1086                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1087                 __cpcmd(buf, NULL, 0, NULL);
1088                 break;
1089         case REIPL_METHOD_DEFAULT:
1090                 if (MACHINE_IS_VM)
1091                         __cpcmd("IPL", NULL, 0, NULL);
1092                 diag308(DIAG308_IPL, NULL);
1093                 break;
1094         case REIPL_METHOD_FCP_DUMP:
1095                 break;
1096         }
1097         disabled_wait((unsigned long) __builtin_return_address(0));
1098 }
1099
1100 static void reipl_run(struct shutdown_trigger *trigger)
1101 {
1102         smp_switch_to_ipl_cpu(__reipl_run, NULL);
1103 }
1104
1105 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1106 {
1107         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1108         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1109         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1110         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1111 }
1112
1113 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1114 {
1115         /* LOADPARM */
1116         /* check if read scp info worked and set loadparm */
1117         if (sclp_ipl_info.is_valid)
1118                 memcpy(ipb->ipl_info.ccw.load_parm,
1119                                 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1120         else
1121                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1122                 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1123         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1124
1125         /* VM PARM */
1126         if (MACHINE_IS_VM && diag308_set_works &&
1127             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1128
1129                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1130                 ipb->ipl_info.ccw.vm_parm_len =
1131                                         ipl_block.ipl_info.ccw.vm_parm_len;
1132                 memcpy(ipb->ipl_info.ccw.vm_parm,
1133                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1134         }
1135 }
1136
1137 static int __init reipl_nss_init(void)
1138 {
1139         int rc;
1140
1141         if (!MACHINE_IS_VM)
1142                 return 0;
1143
1144         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1145         if (!reipl_block_nss)
1146                 return -ENOMEM;
1147
1148         if (!diag308_set_works)
1149                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1150
1151         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1152         if (rc)
1153                 return rc;
1154
1155         reipl_block_ccw_init(reipl_block_nss);
1156         if (ipl_info.type == IPL_TYPE_NSS) {
1157                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1158                         ' ', NSS_NAME_SIZE);
1159                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1160                         kernel_nss_name, strlen(kernel_nss_name));
1161                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1162                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1163                         DIAG308_VM_FLAGS_NSS_VALID;
1164
1165                 reipl_block_ccw_fill_parms(reipl_block_nss);
1166         }
1167
1168         reipl_capabilities |= IPL_TYPE_NSS;
1169         return 0;
1170 }
1171
1172 static int __init reipl_ccw_init(void)
1173 {
1174         int rc;
1175
1176         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1177         if (!reipl_block_ccw)
1178                 return -ENOMEM;
1179
1180         if (MACHINE_IS_VM) {
1181                 if (!diag308_set_works)
1182                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1183                 rc = sysfs_create_group(&reipl_kset->kobj,
1184                                         &reipl_ccw_attr_group_vm);
1185         } else {
1186                 if(!diag308_set_works)
1187                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1188                 rc = sysfs_create_group(&reipl_kset->kobj,
1189                                         &reipl_ccw_attr_group_lpar);
1190         }
1191         if (rc)
1192                 return rc;
1193
1194         reipl_block_ccw_init(reipl_block_ccw);
1195         if (ipl_info.type == IPL_TYPE_CCW) {
1196                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1197                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1198         }
1199
1200         reipl_capabilities |= IPL_TYPE_CCW;
1201         return 0;
1202 }
1203
1204 static int __init reipl_fcp_init(void)
1205 {
1206         int rc;
1207
1208         if (!diag308_set_works) {
1209                 if (ipl_info.type == IPL_TYPE_FCP) {
1210                         make_attrs_ro(reipl_fcp_attrs);
1211                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1212                 } else
1213                         return 0;
1214         }
1215
1216         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1217         if (!reipl_block_fcp)
1218                 return -ENOMEM;
1219
1220         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1221         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1222                                              &reipl_kset->kobj);
1223         if (!reipl_kset) {
1224                 free_page((unsigned long) reipl_block_fcp);
1225                 return -ENOMEM;
1226         }
1227
1228         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1229         if (rc) {
1230                 kset_unregister(reipl_fcp_kset);
1231                 free_page((unsigned long) reipl_block_fcp);
1232                 return rc;
1233         }
1234
1235         rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1236                                    &sys_reipl_fcp_scp_data_attr);
1237         if (rc) {
1238                 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1239                 kset_unregister(reipl_fcp_kset);
1240                 free_page((unsigned long) reipl_block_fcp);
1241                 return rc;
1242         }
1243
1244         if (ipl_info.type == IPL_TYPE_FCP)
1245                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1246         else {
1247                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1248                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1249                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1250                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1251                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1252         }
1253         reipl_capabilities |= IPL_TYPE_FCP;
1254         return 0;
1255 }
1256
1257 static int __init reipl_init(void)
1258 {
1259         int rc;
1260
1261         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1262         if (!reipl_kset)
1263                 return -ENOMEM;
1264         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1265         if (rc) {
1266                 kset_unregister(reipl_kset);
1267                 return rc;
1268         }
1269         rc = reipl_ccw_init();
1270         if (rc)
1271                 return rc;
1272         rc = reipl_fcp_init();
1273         if (rc)
1274                 return rc;
1275         rc = reipl_nss_init();
1276         if (rc)
1277                 return rc;
1278         rc = reipl_set_type(ipl_info.type);
1279         if (rc)
1280                 return rc;
1281         return 0;
1282 }
1283
1284 static struct shutdown_action __refdata reipl_action = {
1285         .name   = SHUTDOWN_ACTION_REIPL_STR,
1286         .fn     = reipl_run,
1287         .init   = reipl_init,
1288 };
1289
1290 /*
1291  * dump shutdown action: Dump Linux on shutdown.
1292  */
1293
1294 /* FCP dump device attributes */
1295
1296 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1297                    dump_block_fcp->ipl_info.fcp.wwpn);
1298 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1299                    dump_block_fcp->ipl_info.fcp.lun);
1300 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1301                    dump_block_fcp->ipl_info.fcp.bootprog);
1302 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1303                    dump_block_fcp->ipl_info.fcp.br_lba);
1304 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1305                    dump_block_fcp->ipl_info.fcp.devno);
1306
1307 static struct attribute *dump_fcp_attrs[] = {
1308         &sys_dump_fcp_device_attr.attr,
1309         &sys_dump_fcp_wwpn_attr.attr,
1310         &sys_dump_fcp_lun_attr.attr,
1311         &sys_dump_fcp_bootprog_attr.attr,
1312         &sys_dump_fcp_br_lba_attr.attr,
1313         NULL,
1314 };
1315
1316 static struct attribute_group dump_fcp_attr_group = {
1317         .name  = IPL_FCP_STR,
1318         .attrs = dump_fcp_attrs,
1319 };
1320
1321 /* CCW dump device attributes */
1322
1323 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1324                    dump_block_ccw->ipl_info.ccw.devno);
1325
1326 static struct attribute *dump_ccw_attrs[] = {
1327         &sys_dump_ccw_device_attr.attr,
1328         NULL,
1329 };
1330
1331 static struct attribute_group dump_ccw_attr_group = {
1332         .name  = IPL_CCW_STR,
1333         .attrs = dump_ccw_attrs,
1334 };
1335
1336 /* dump type */
1337
1338 static int dump_set_type(enum dump_type type)
1339 {
1340         if (!(dump_capabilities & type))
1341                 return -EINVAL;
1342         switch (type) {
1343         case DUMP_TYPE_CCW:
1344                 if (diag308_set_works)
1345                         dump_method = DUMP_METHOD_CCW_DIAG;
1346                 else if (MACHINE_IS_VM)
1347                         dump_method = DUMP_METHOD_CCW_VM;
1348                 else
1349                         dump_method = DUMP_METHOD_CCW_CIO;
1350                 break;
1351         case DUMP_TYPE_FCP:
1352                 dump_method = DUMP_METHOD_FCP_DIAG;
1353                 break;
1354         default:
1355                 dump_method = DUMP_METHOD_NONE;
1356         }
1357         dump_type = type;
1358         return 0;
1359 }
1360
1361 static ssize_t dump_type_show(struct kobject *kobj,
1362                               struct kobj_attribute *attr, char *page)
1363 {
1364         return sprintf(page, "%s\n", dump_type_str(dump_type));
1365 }
1366
1367 static ssize_t dump_type_store(struct kobject *kobj,
1368                                struct kobj_attribute *attr,
1369                                const char *buf, size_t len)
1370 {
1371         int rc = -EINVAL;
1372
1373         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1374                 rc = dump_set_type(DUMP_TYPE_NONE);
1375         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1376                 rc = dump_set_type(DUMP_TYPE_CCW);
1377         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1378                 rc = dump_set_type(DUMP_TYPE_FCP);
1379         return (rc != 0) ? rc : len;
1380 }
1381
1382 static struct kobj_attribute dump_type_attr =
1383         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1384
1385 static struct kset *dump_kset;
1386
1387 static void __dump_run(void *unused)
1388 {
1389         struct ccw_dev_id devid;
1390         static char buf[100];
1391
1392         switch (dump_method) {
1393         case DUMP_METHOD_CCW_CIO:
1394                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1395                 devid.ssid  = 0;
1396                 reipl_ccw_dev(&devid);
1397                 break;
1398         case DUMP_METHOD_CCW_VM:
1399                 sprintf(buf, "STORE STATUS");
1400                 __cpcmd(buf, NULL, 0, NULL);
1401                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1402                 __cpcmd(buf, NULL, 0, NULL);
1403                 break;
1404         case DUMP_METHOD_CCW_DIAG:
1405                 diag308(DIAG308_SET, dump_block_ccw);
1406                 diag308(DIAG308_DUMP, NULL);
1407                 break;
1408         case DUMP_METHOD_FCP_DIAG:
1409                 diag308(DIAG308_SET, dump_block_fcp);
1410                 diag308(DIAG308_DUMP, NULL);
1411                 break;
1412         default:
1413                 break;
1414         }
1415 }
1416
1417 static void dump_run(struct shutdown_trigger *trigger)
1418 {
1419         if (dump_method == DUMP_METHOD_NONE)
1420                 return;
1421         smp_send_stop();
1422         smp_switch_to_ipl_cpu(__dump_run, NULL);
1423 }
1424
1425 static int __init dump_ccw_init(void)
1426 {
1427         int rc;
1428
1429         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1430         if (!dump_block_ccw)
1431                 return -ENOMEM;
1432         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1433         if (rc) {
1434                 free_page((unsigned long)dump_block_ccw);
1435                 return rc;
1436         }
1437         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1438         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1439         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1440         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1441         dump_capabilities |= DUMP_TYPE_CCW;
1442         return 0;
1443 }
1444
1445 static int __init dump_fcp_init(void)
1446 {
1447         int rc;
1448
1449         if (!sclp_ipl_info.has_dump)
1450                 return 0; /* LDIPL DUMP is not installed */
1451         if (!diag308_set_works)
1452                 return 0;
1453         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1454         if (!dump_block_fcp)
1455                 return -ENOMEM;
1456         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1457         if (rc) {
1458                 free_page((unsigned long)dump_block_fcp);
1459                 return rc;
1460         }
1461         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1462         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1463         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1464         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1465         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1466         dump_capabilities |= DUMP_TYPE_FCP;
1467         return 0;
1468 }
1469
1470 static int __init dump_init(void)
1471 {
1472         int rc;
1473
1474         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1475         if (!dump_kset)
1476                 return -ENOMEM;
1477         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1478         if (rc) {
1479                 kset_unregister(dump_kset);
1480                 return rc;
1481         }
1482         rc = dump_ccw_init();
1483         if (rc)
1484                 return rc;
1485         rc = dump_fcp_init();
1486         if (rc)
1487                 return rc;
1488         dump_set_type(DUMP_TYPE_NONE);
1489         return 0;
1490 }
1491
1492 static struct shutdown_action __refdata dump_action = {
1493         .name   = SHUTDOWN_ACTION_DUMP_STR,
1494         .fn     = dump_run,
1495         .init   = dump_init,
1496 };
1497
1498 static void dump_reipl_run(struct shutdown_trigger *trigger)
1499 {
1500         preempt_disable();
1501         /*
1502          * Bypass dynamic address translation (DAT) when storing IPL parameter
1503          * information block address and checksum into the prefix area
1504          * (corresponding to absolute addresses 0-8191).
1505          * When enhanced DAT applies and the STE format control in one,
1506          * the absolute address is formed without prefixing. In this case a
1507          * normal store (stg/st) into the prefix area would no more match to
1508          * absolute addresses 0-8191.
1509          */
1510 #ifdef CONFIG_64BIT
1511         asm volatile("sturg %0,%1"
1512                 :: "a" ((unsigned long) reipl_block_actual),
1513                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1514 #else
1515         asm volatile("stura %0,%1"
1516                 :: "a" ((unsigned long) reipl_block_actual),
1517                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1518 #endif
1519         asm volatile("stura %0,%1"
1520                 :: "a" (csum_partial(reipl_block_actual,
1521                                      reipl_block_actual->hdr.len, 0)),
1522                 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1523         preempt_enable();
1524         dump_run(trigger);
1525 }
1526
1527 static int __init dump_reipl_init(void)
1528 {
1529         if (!diag308_set_works)
1530                 return -EOPNOTSUPP;
1531         else
1532                 return 0;
1533 }
1534
1535 static struct shutdown_action __refdata dump_reipl_action = {
1536         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1537         .fn     = dump_reipl_run,
1538         .init   = dump_reipl_init,
1539 };
1540
1541 /*
1542  * vmcmd shutdown action: Trigger vm command on shutdown.
1543  */
1544
1545 static char vmcmd_on_reboot[128];
1546 static char vmcmd_on_panic[128];
1547 static char vmcmd_on_halt[128];
1548 static char vmcmd_on_poff[128];
1549 static char vmcmd_on_restart[128];
1550
1551 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1552 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1553 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1554 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1555 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1556
1557 static struct attribute *vmcmd_attrs[] = {
1558         &sys_vmcmd_on_reboot_attr.attr,
1559         &sys_vmcmd_on_panic_attr.attr,
1560         &sys_vmcmd_on_halt_attr.attr,
1561         &sys_vmcmd_on_poff_attr.attr,
1562         &sys_vmcmd_on_restart_attr.attr,
1563         NULL,
1564 };
1565
1566 static struct attribute_group vmcmd_attr_group = {
1567         .attrs = vmcmd_attrs,
1568 };
1569
1570 static struct kset *vmcmd_kset;
1571
1572 static void vmcmd_run(struct shutdown_trigger *trigger)
1573 {
1574         char *cmd, *next_cmd;
1575
1576         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1577                 cmd = vmcmd_on_reboot;
1578         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1579                 cmd = vmcmd_on_panic;
1580         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1581                 cmd = vmcmd_on_halt;
1582         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1583                 cmd = vmcmd_on_poff;
1584         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1585                 cmd = vmcmd_on_restart;
1586         else
1587                 return;
1588
1589         if (strlen(cmd) == 0)
1590                 return;
1591         do {
1592                 next_cmd = strchr(cmd, '\n');
1593                 if (next_cmd) {
1594                         next_cmd[0] = 0;
1595                         next_cmd += 1;
1596                 }
1597                 __cpcmd(cmd, NULL, 0, NULL);
1598                 cmd = next_cmd;
1599         } while (cmd != NULL);
1600 }
1601
1602 static int vmcmd_init(void)
1603 {
1604         if (!MACHINE_IS_VM)
1605                 return -EOPNOTSUPP;
1606         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1607         if (!vmcmd_kset)
1608                 return -ENOMEM;
1609         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1610 }
1611
1612 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1613                                               vmcmd_run, vmcmd_init};
1614
1615 /*
1616  * stop shutdown action: Stop Linux on shutdown.
1617  */
1618
1619 static void stop_run(struct shutdown_trigger *trigger)
1620 {
1621         if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1622                 disabled_wait((unsigned long) __builtin_return_address(0));
1623         while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1624                 cpu_relax();
1625         for (;;);
1626 }
1627
1628 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1629                                              stop_run, NULL};
1630
1631 /* action list */
1632
1633 static struct shutdown_action *shutdown_actions_list[] = {
1634         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1635         &vmcmd_action, &stop_action};
1636 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1637
1638 /*
1639  * Trigger section
1640  */
1641
1642 static struct kset *shutdown_actions_kset;
1643
1644 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1645                        size_t len)
1646 {
1647         int i;
1648
1649         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1650                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1651                         if (shutdown_actions_list[i]->init_rc) {
1652                                 return shutdown_actions_list[i]->init_rc;
1653                         } else {
1654                                 trigger->action = shutdown_actions_list[i];
1655                                 return len;
1656                         }
1657                 }
1658         }
1659         return -EINVAL;
1660 }
1661
1662 /* on reipl */
1663
1664 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1665                                                     &reipl_action};
1666
1667 static ssize_t on_reboot_show(struct kobject *kobj,
1668                               struct kobj_attribute *attr, char *page)
1669 {
1670         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1671 }
1672
1673 static ssize_t on_reboot_store(struct kobject *kobj,
1674                                struct kobj_attribute *attr,
1675                                const char *buf, size_t len)
1676 {
1677         return set_trigger(buf, &on_reboot_trigger, len);
1678 }
1679
1680 static struct kobj_attribute on_reboot_attr =
1681         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1682
1683 static void do_machine_restart(char *__unused)
1684 {
1685         smp_send_stop();
1686         on_reboot_trigger.action->fn(&on_reboot_trigger);
1687         reipl_run(NULL);
1688 }
1689 void (*_machine_restart)(char *command) = do_machine_restart;
1690
1691 /* on panic */
1692
1693 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1694
1695 static ssize_t on_panic_show(struct kobject *kobj,
1696                              struct kobj_attribute *attr, char *page)
1697 {
1698         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1699 }
1700
1701 static ssize_t on_panic_store(struct kobject *kobj,
1702                               struct kobj_attribute *attr,
1703                               const char *buf, size_t len)
1704 {
1705         return set_trigger(buf, &on_panic_trigger, len);
1706 }
1707
1708 static struct kobj_attribute on_panic_attr =
1709         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1710
1711 static void do_panic(void)
1712 {
1713         on_panic_trigger.action->fn(&on_panic_trigger);
1714         stop_run(&on_panic_trigger);
1715 }
1716
1717 /* on restart */
1718
1719 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1720         &reipl_action};
1721
1722 static ssize_t on_restart_show(struct kobject *kobj,
1723                                struct kobj_attribute *attr, char *page)
1724 {
1725         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1726 }
1727
1728 static ssize_t on_restart_store(struct kobject *kobj,
1729                                 struct kobj_attribute *attr,
1730                                 const char *buf, size_t len)
1731 {
1732         return set_trigger(buf, &on_restart_trigger, len);
1733 }
1734
1735 static struct kobj_attribute on_restart_attr =
1736         __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1737
1738 void do_restart(void)
1739 {
1740         smp_send_stop();
1741         on_restart_trigger.action->fn(&on_restart_trigger);
1742         stop_run(&on_restart_trigger);
1743 }
1744
1745 /* on halt */
1746
1747 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1748
1749 static ssize_t on_halt_show(struct kobject *kobj,
1750                             struct kobj_attribute *attr, char *page)
1751 {
1752         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1753 }
1754
1755 static ssize_t on_halt_store(struct kobject *kobj,
1756                              struct kobj_attribute *attr,
1757                              const char *buf, size_t len)
1758 {
1759         return set_trigger(buf, &on_halt_trigger, len);
1760 }
1761
1762 static struct kobj_attribute on_halt_attr =
1763         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1764
1765
1766 static void do_machine_halt(void)
1767 {
1768         smp_send_stop();
1769         on_halt_trigger.action->fn(&on_halt_trigger);
1770         stop_run(&on_halt_trigger);
1771 }
1772 void (*_machine_halt)(void) = do_machine_halt;
1773
1774 /* on power off */
1775
1776 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1777
1778 static ssize_t on_poff_show(struct kobject *kobj,
1779                             struct kobj_attribute *attr, char *page)
1780 {
1781         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1782 }
1783
1784 static ssize_t on_poff_store(struct kobject *kobj,
1785                              struct kobj_attribute *attr,
1786                              const char *buf, size_t len)
1787 {
1788         return set_trigger(buf, &on_poff_trigger, len);
1789 }
1790
1791 static struct kobj_attribute on_poff_attr =
1792         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1793
1794
1795 static void do_machine_power_off(void)
1796 {
1797         smp_send_stop();
1798         on_poff_trigger.action->fn(&on_poff_trigger);
1799         stop_run(&on_poff_trigger);
1800 }
1801 void (*_machine_power_off)(void) = do_machine_power_off;
1802
1803 static void __init shutdown_triggers_init(void)
1804 {
1805         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1806                                                     firmware_kobj);
1807         if (!shutdown_actions_kset)
1808                 goto fail;
1809         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1810                               &on_reboot_attr.attr))
1811                 goto fail;
1812         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1813                               &on_panic_attr.attr))
1814                 goto fail;
1815         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1816                               &on_halt_attr.attr))
1817                 goto fail;
1818         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1819                               &on_poff_attr.attr))
1820                 goto fail;
1821         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1822                               &on_restart_attr.attr))
1823                 goto fail;
1824         return;
1825 fail:
1826         panic("shutdown_triggers_init failed\n");
1827 }
1828
1829 static void __init shutdown_actions_init(void)
1830 {
1831         int i;
1832
1833         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1834                 if (!shutdown_actions_list[i]->init)
1835                         continue;
1836                 shutdown_actions_list[i]->init_rc =
1837                         shutdown_actions_list[i]->init();
1838         }
1839 }
1840
1841 static int __init s390_ipl_init(void)
1842 {
1843         sclp_get_ipl_info(&sclp_ipl_info);
1844         shutdown_actions_init();
1845         shutdown_triggers_init();
1846         return 0;
1847 }
1848
1849 __initcall(s390_ipl_init);
1850
1851 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1852 {
1853         int sx, dx;
1854
1855         dx = 0;
1856         for (sx = 0; src[sx] != 0; sx++) {
1857                 if (src[sx] == '"')
1858                         continue;
1859                 dst[dx++] = src[sx];
1860                 if (dx >= n)
1861                         break;
1862         }
1863 }
1864
1865 static int __init vmcmd_on_reboot_setup(char *str)
1866 {
1867         if (!MACHINE_IS_VM)
1868                 return 1;
1869         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1870         vmcmd_on_reboot[127] = 0;
1871         on_reboot_trigger.action = &vmcmd_action;
1872         return 1;
1873 }
1874 __setup("vmreboot=", vmcmd_on_reboot_setup);
1875
1876 static int __init vmcmd_on_panic_setup(char *str)
1877 {
1878         if (!MACHINE_IS_VM)
1879                 return 1;
1880         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1881         vmcmd_on_panic[127] = 0;
1882         on_panic_trigger.action = &vmcmd_action;
1883         return 1;
1884 }
1885 __setup("vmpanic=", vmcmd_on_panic_setup);
1886
1887 static int __init vmcmd_on_halt_setup(char *str)
1888 {
1889         if (!MACHINE_IS_VM)
1890                 return 1;
1891         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1892         vmcmd_on_halt[127] = 0;
1893         on_halt_trigger.action = &vmcmd_action;
1894         return 1;
1895 }
1896 __setup("vmhalt=", vmcmd_on_halt_setup);
1897
1898 static int __init vmcmd_on_poff_setup(char *str)
1899 {
1900         if (!MACHINE_IS_VM)
1901                 return 1;
1902         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1903         vmcmd_on_poff[127] = 0;
1904         on_poff_trigger.action = &vmcmd_action;
1905         return 1;
1906 }
1907 __setup("vmpoff=", vmcmd_on_poff_setup);
1908
1909 static int on_panic_notify(struct notifier_block *self,
1910                            unsigned long event, void *data)
1911 {
1912         do_panic();
1913         return NOTIFY_OK;
1914 }
1915
1916 static struct notifier_block on_panic_nb = {
1917         .notifier_call = on_panic_notify,
1918         .priority = INT_MIN,
1919 };
1920
1921 void __init setup_ipl(void)
1922 {
1923         ipl_info.type = get_ipl_type();
1924         switch (ipl_info.type) {
1925         case IPL_TYPE_CCW:
1926                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1927                 ipl_info.data.ccw.dev_id.ssid = 0;
1928                 break;
1929         case IPL_TYPE_FCP:
1930         case IPL_TYPE_FCP_DUMP:
1931                 ipl_info.data.fcp.dev_id.devno =
1932                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1933                 ipl_info.data.fcp.dev_id.ssid = 0;
1934                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1935                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1936                 break;
1937         case IPL_TYPE_NSS:
1938                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1939                         sizeof(ipl_info.data.nss.name));
1940                 break;
1941         case IPL_TYPE_UNKNOWN:
1942                 /* We have no info to copy */
1943                 break;
1944         }
1945         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1946 }
1947
1948 void __init ipl_update_parameters(void)
1949 {
1950         int rc;
1951
1952         rc = diag308(DIAG308_STORE, &ipl_block);
1953         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1954                 diag308_set_works = 1;
1955 }
1956
1957 void __init ipl_save_parameters(void)
1958 {
1959         struct cio_iplinfo iplinfo;
1960         void *src, *dst;
1961
1962         if (cio_get_iplinfo(&iplinfo))
1963                 return;
1964
1965         ipl_devno = iplinfo.devno;
1966         ipl_flags |= IPL_DEVNO_VALID;
1967         if (!iplinfo.is_qdio)
1968                 return;
1969         ipl_flags |= IPL_PARMBLOCK_VALID;
1970         src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1971         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1972         memmove(dst, src, PAGE_SIZE);
1973         S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1974 }
1975
1976 static LIST_HEAD(rcall);
1977 static DEFINE_MUTEX(rcall_mutex);
1978
1979 void register_reset_call(struct reset_call *reset)
1980 {
1981         mutex_lock(&rcall_mutex);
1982         list_add(&reset->list, &rcall);
1983         mutex_unlock(&rcall_mutex);
1984 }
1985 EXPORT_SYMBOL_GPL(register_reset_call);
1986
1987 void unregister_reset_call(struct reset_call *reset)
1988 {
1989         mutex_lock(&rcall_mutex);
1990         list_del(&reset->list);
1991         mutex_unlock(&rcall_mutex);
1992 }
1993 EXPORT_SYMBOL_GPL(unregister_reset_call);
1994
1995 static void do_reset_calls(void)
1996 {
1997         struct reset_call *reset;
1998
1999 #ifdef CONFIG_64BIT
2000         if (diag308_set_works) {
2001                 diag308_reset();
2002                 return;
2003         }
2004 #endif
2005         list_for_each_entry(reset, &rcall, list)
2006                 reset->fn();
2007 }
2008
2009 u32 dump_prefix_page;
2010
2011 void s390_reset_system(void)
2012 {
2013         struct _lowcore *lc;
2014
2015         lc = (struct _lowcore *)(unsigned long) store_prefix();
2016
2017         /* Stack for interrupt/machine check handler */
2018         lc->panic_stack = S390_lowcore.panic_stack;
2019
2020         /* Save prefix page address for dump case */
2021         dump_prefix_page = (u32)(unsigned long) lc;
2022
2023         /* Disable prefixing */
2024         set_prefix(0);
2025
2026         /* Disable lowcore protection */
2027         __ctl_clear_bit(0,28);
2028
2029         /* Set new machine check handler */
2030         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
2031         S390_lowcore.mcck_new_psw.addr =
2032                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2033
2034         /* Set new program check handler */
2035         S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
2036         S390_lowcore.program_new_psw.addr =
2037                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2038
2039         do_reset_calls();
2040 }
2041