943 lines
22 KiB
C
943 lines
22 KiB
C
![]() |
/*
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* arch/s390/kernel/ipl.c
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* ipl/reipl/dump support for Linux on s390.
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*
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* Copyright (C) IBM Corp. 2005,2006
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* Author(s): Michael Holzheu <holzheu@de.ibm.com>
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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* Volker Sameske <sameske@de.ibm.com>
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/reboot.h>
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#include <asm/smp.h>
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#include <asm/setup.h>
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#include <asm/cpcmd.h>
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#include <asm/cio.h>
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#define IPL_PARM_BLOCK_VERSION 0
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enum ipl_type {
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IPL_TYPE_NONE = 1,
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IPL_TYPE_UNKNOWN = 2,
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IPL_TYPE_CCW = 4,
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IPL_TYPE_FCP = 8,
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};
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#define IPL_NONE_STR "none"
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#define IPL_UNKNOWN_STR "unknown"
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#define IPL_CCW_STR "ccw"
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#define IPL_FCP_STR "fcp"
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static char *ipl_type_str(enum ipl_type type)
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{
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switch (type) {
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case IPL_TYPE_NONE:
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return IPL_NONE_STR;
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case IPL_TYPE_CCW:
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return IPL_CCW_STR;
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case IPL_TYPE_FCP:
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return IPL_FCP_STR;
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case IPL_TYPE_UNKNOWN:
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default:
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return IPL_UNKNOWN_STR;
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}
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}
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enum ipl_method {
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IPL_METHOD_NONE,
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IPL_METHOD_CCW_CIO,
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IPL_METHOD_CCW_DIAG,
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IPL_METHOD_CCW_VM,
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IPL_METHOD_FCP_RO_DIAG,
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IPL_METHOD_FCP_RW_DIAG,
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IPL_METHOD_FCP_RO_VM,
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};
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enum shutdown_action {
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SHUTDOWN_REIPL,
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SHUTDOWN_DUMP,
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SHUTDOWN_STOP,
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};
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#define SHUTDOWN_REIPL_STR "reipl"
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#define SHUTDOWN_DUMP_STR "dump"
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#define SHUTDOWN_STOP_STR "stop"
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static char *shutdown_action_str(enum shutdown_action action)
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{
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switch (action) {
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case SHUTDOWN_REIPL:
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return SHUTDOWN_REIPL_STR;
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case SHUTDOWN_DUMP:
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return SHUTDOWN_DUMP_STR;
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case SHUTDOWN_STOP:
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return SHUTDOWN_STOP_STR;
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default:
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BUG();
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}
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}
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enum diag308_subcode {
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DIAG308_IPL = 3,
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DIAG308_DUMP = 4,
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DIAG308_SET = 5,
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DIAG308_STORE = 6,
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};
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enum diag308_ipl_type {
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DIAG308_IPL_TYPE_FCP = 0,
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DIAG308_IPL_TYPE_CCW = 2,
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};
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enum diag308_opt {
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DIAG308_IPL_OPT_IPL = 0x10,
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DIAG308_IPL_OPT_DUMP = 0x20,
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};
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enum diag308_rc {
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DIAG308_RC_OK = 1,
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};
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static int diag308_set_works = 0;
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static int reipl_capabilities = IPL_TYPE_UNKNOWN;
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static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
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static enum ipl_method reipl_method = IPL_METHOD_NONE;
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static struct ipl_parameter_block *reipl_block_fcp;
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static struct ipl_parameter_block *reipl_block_ccw;
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static int dump_capabilities = IPL_TYPE_NONE;
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static enum ipl_type dump_type = IPL_TYPE_NONE;
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static enum ipl_method dump_method = IPL_METHOD_NONE;
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static struct ipl_parameter_block *dump_block_fcp;
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static struct ipl_parameter_block *dump_block_ccw;
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static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
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static int diag308(unsigned long subcode, void *addr)
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{
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register unsigned long _addr asm("0") = (unsigned long)addr;
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register unsigned long _rc asm("1") = 0;
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asm volatile (
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" diag %0,%2,0x308\n"
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"0: \n"
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".section __ex_table,\"a\"\n"
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#ifdef CONFIG_64BIT
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" .align 8\n"
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" .quad 0b, 0b\n"
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#else
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" .align 4\n"
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" .long 0b, 0b\n"
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#endif
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".previous\n"
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: "+d" (_addr), "+d" (_rc)
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: "d" (subcode) : "cc", "memory" );
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return _rc;
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}
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/* SYSFS */
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#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
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static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
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char *page) \
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{ \
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return sprintf(page, _format, _value); \
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} \
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static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
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__ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
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#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
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static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
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char *page) \
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{ \
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return sprintf(page, _fmt_out, \
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(unsigned long long) _value); \
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} \
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static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\
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const char *buf, size_t len) \
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{ \
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unsigned long long value; \
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if (sscanf(buf, _fmt_in, &value) != 1) \
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return -EINVAL; \
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_value = value; \
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return len; \
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} \
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static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
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__ATTR(_name,(S_IRUGO | S_IWUSR), \
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sys_##_prefix##_##_name##_show, \
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sys_##_prefix##_##_name##_store);
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static void make_attrs_ro(struct attribute **attrs)
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{
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while (*attrs) {
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(*attrs)->mode = S_IRUGO;
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attrs++;
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}
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}
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/*
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* ipl section
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*/
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static enum ipl_type ipl_get_type(void)
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{
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struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
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if (!IPL_DEVNO_VALID)
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return IPL_TYPE_UNKNOWN;
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if (!IPL_PARMBLOCK_VALID)
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return IPL_TYPE_CCW;
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if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
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return IPL_TYPE_UNKNOWN;
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if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
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return IPL_TYPE_UNKNOWN;
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return IPL_TYPE_FCP;
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}
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static ssize_t ipl_type_show(struct subsystem *subsys, char *page)
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{
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return sprintf(page, "%s\n", ipl_type_str(ipl_get_type()));
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}
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static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
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static ssize_t sys_ipl_device_show(struct subsystem *subsys, char *page)
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{
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struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
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switch (ipl_get_type()) {
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case IPL_TYPE_CCW:
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return sprintf(page, "0.0.%04x\n", ipl_devno);
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case IPL_TYPE_FCP:
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return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
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default:
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return 0;
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}
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}
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static struct subsys_attribute sys_ipl_device_attr =
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__ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
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static ssize_t ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off,
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size_t count)
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{
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unsigned int size = IPL_PARMBLOCK_SIZE;
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if (off > size)
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return 0;
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if (off + count > size)
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count = size - off;
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memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
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return count;
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}
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static struct bin_attribute ipl_parameter_attr = {
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.attr = {
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.name = "binary_parameter",
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.mode = S_IRUGO,
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.owner = THIS_MODULE,
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},
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.size = PAGE_SIZE,
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.read = &ipl_parameter_read,
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};
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static ssize_t ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off,
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size_t count)
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{
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unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
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void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
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if (off > size)
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return 0;
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if (off + count > size)
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count = size - off;
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memcpy(buf, scp_data + off, count);
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return count;
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}
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static struct bin_attribute ipl_scp_data_attr = {
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.attr = {
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.name = "scp_data",
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.mode = S_IRUGO,
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.owner = THIS_MODULE,
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},
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.size = PAGE_SIZE,
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.read = &ipl_scp_data_read,
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};
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/* FCP ipl device attributes */
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DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
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IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
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DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
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IPL_PARMBLOCK_START->ipl_info.fcp.lun);
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DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
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IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
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DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
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IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
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static struct attribute *ipl_fcp_attrs[] = {
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&sys_ipl_type_attr.attr,
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&sys_ipl_device_attr.attr,
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&sys_ipl_fcp_wwpn_attr.attr,
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&sys_ipl_fcp_lun_attr.attr,
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&sys_ipl_fcp_bootprog_attr.attr,
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&sys_ipl_fcp_br_lba_attr.attr,
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NULL,
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};
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static struct attribute_group ipl_fcp_attr_group = {
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.attrs = ipl_fcp_attrs,
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};
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/* CCW ipl device attributes */
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static struct attribute *ipl_ccw_attrs[] = {
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&sys_ipl_type_attr.attr,
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&sys_ipl_device_attr.attr,
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NULL,
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};
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static struct attribute_group ipl_ccw_attr_group = {
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.attrs = ipl_ccw_attrs,
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};
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/* UNKNOWN ipl device attributes */
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static struct attribute *ipl_unknown_attrs[] = {
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&sys_ipl_type_attr.attr,
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NULL,
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};
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static struct attribute_group ipl_unknown_attr_group = {
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.attrs = ipl_unknown_attrs,
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};
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static decl_subsys(ipl, NULL, NULL);
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/*
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* reipl section
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*/
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/* FCP reipl device attributes */
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DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
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reipl_block_fcp->ipl_info.fcp.wwpn);
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DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
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reipl_block_fcp->ipl_info.fcp.lun);
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DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
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reipl_block_fcp->ipl_info.fcp.bootprog);
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DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
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reipl_block_fcp->ipl_info.fcp.br_lba);
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DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
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reipl_block_fcp->ipl_info.fcp.devno);
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static struct attribute *reipl_fcp_attrs[] = {
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&sys_reipl_fcp_device_attr.attr,
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&sys_reipl_fcp_wwpn_attr.attr,
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&sys_reipl_fcp_lun_attr.attr,
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&sys_reipl_fcp_bootprog_attr.attr,
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&sys_reipl_fcp_br_lba_attr.attr,
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NULL,
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};
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static struct attribute_group reipl_fcp_attr_group = {
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.name = IPL_FCP_STR,
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.attrs = reipl_fcp_attrs,
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};
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/* CCW reipl device attributes */
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DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
|
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reipl_block_ccw->ipl_info.ccw.devno);
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static struct attribute *reipl_ccw_attrs[] = {
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&sys_reipl_ccw_device_attr.attr,
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NULL,
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};
|
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static struct attribute_group reipl_ccw_attr_group = {
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.name = IPL_CCW_STR,
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.attrs = reipl_ccw_attrs,
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};
|
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|
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/* reipl type */
|
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|
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static int reipl_set_type(enum ipl_type type)
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{
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if (!(reipl_capabilities & type))
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return -EINVAL;
|
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|
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switch(type) {
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case IPL_TYPE_CCW:
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if (MACHINE_IS_VM)
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reipl_method = IPL_METHOD_CCW_VM;
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else
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reipl_method = IPL_METHOD_CCW_CIO;
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break;
|
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case IPL_TYPE_FCP:
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if (diag308_set_works)
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reipl_method = IPL_METHOD_FCP_RW_DIAG;
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else if (MACHINE_IS_VM)
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reipl_method = IPL_METHOD_FCP_RO_VM;
|
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else
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reipl_method = IPL_METHOD_FCP_RO_DIAG;
|
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break;
|
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default:
|
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reipl_method = IPL_METHOD_NONE;
|
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}
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reipl_type = type;
|
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return 0;
|
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}
|
||
|
|
||
|
static ssize_t reipl_type_show(struct subsystem *subsys, char *page)
|
||
|
{
|
||
|
return sprintf(page, "%s\n", ipl_type_str(reipl_type));
|
||
|
}
|
||
|
|
||
|
static ssize_t reipl_type_store(struct subsystem *subsys, const char *buf,
|
||
|
size_t len)
|
||
|
{
|
||
|
int rc = -EINVAL;
|
||
|
|
||
|
if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
|
||
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rc = reipl_set_type(IPL_TYPE_CCW);
|
||
|
else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
|
||
|
rc = reipl_set_type(IPL_TYPE_FCP);
|
||
|
return (rc != 0) ? rc : len;
|
||
|
}
|
||
|
|
||
|
static struct subsys_attribute reipl_type_attr =
|
||
|
__ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
|
||
|
|
||
|
static decl_subsys(reipl, NULL, NULL);
|
||
|
|
||
|
/*
|
||
|
* dump section
|
||
|
*/
|
||
|
|
||
|
/* FCP dump device attributes */
|
||
|
|
||
|
DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
|
||
|
dump_block_fcp->ipl_info.fcp.wwpn);
|
||
|
DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
|
||
|
dump_block_fcp->ipl_info.fcp.lun);
|
||
|
DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
|
||
|
dump_block_fcp->ipl_info.fcp.bootprog);
|
||
|
DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
|
||
|
dump_block_fcp->ipl_info.fcp.br_lba);
|
||
|
DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
|
||
|
dump_block_fcp->ipl_info.fcp.devno);
|
||
|
|
||
|
static struct attribute *dump_fcp_attrs[] = {
|
||
|
&sys_dump_fcp_device_attr.attr,
|
||
|
&sys_dump_fcp_wwpn_attr.attr,
|
||
|
&sys_dump_fcp_lun_attr.attr,
|
||
|
&sys_dump_fcp_bootprog_attr.attr,
|
||
|
&sys_dump_fcp_br_lba_attr.attr,
|
||
|
NULL,
|
||
|
};
|
||
|
|
||
|
static struct attribute_group dump_fcp_attr_group = {
|
||
|
.name = IPL_FCP_STR,
|
||
|
.attrs = dump_fcp_attrs,
|
||
|
};
|
||
|
|
||
|
/* CCW dump device attributes */
|
||
|
|
||
|
DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
|
||
|
dump_block_ccw->ipl_info.ccw.devno);
|
||
|
|
||
|
static struct attribute *dump_ccw_attrs[] = {
|
||
|
&sys_dump_ccw_device_attr.attr,
|
||
|
NULL,
|
||
|
};
|
||
|
|
||
|
static struct attribute_group dump_ccw_attr_group = {
|
||
|
.name = IPL_CCW_STR,
|
||
|
.attrs = dump_ccw_attrs,
|
||
|
};
|
||
|
|
||
|
/* dump type */
|
||
|
|
||
|
static int dump_set_type(enum ipl_type type)
|
||
|
{
|
||
|
if (!(dump_capabilities & type))
|
||
|
return -EINVAL;
|
||
|
switch(type) {
|
||
|
case IPL_TYPE_CCW:
|
||
|
if (MACHINE_IS_VM)
|
||
|
dump_method = IPL_METHOD_CCW_VM;
|
||
|
else
|
||
|
dump_method = IPL_METHOD_CCW_CIO;
|
||
|
break;
|
||
|
case IPL_TYPE_FCP:
|
||
|
dump_method = IPL_METHOD_FCP_RW_DIAG;
|
||
|
break;
|
||
|
default:
|
||
|
dump_method = IPL_METHOD_NONE;
|
||
|
}
|
||
|
dump_type = type;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static ssize_t dump_type_show(struct subsystem *subsys, char *page)
|
||
|
{
|
||
|
return sprintf(page, "%s\n", ipl_type_str(dump_type));
|
||
|
}
|
||
|
|
||
|
static ssize_t dump_type_store(struct subsystem *subsys, const char *buf,
|
||
|
size_t len)
|
||
|
{
|
||
|
int rc = -EINVAL;
|
||
|
|
||
|
if (strncmp(buf, IPL_NONE_STR, strlen(IPL_NONE_STR)) == 0)
|
||
|
rc = dump_set_type(IPL_TYPE_NONE);
|
||
|
else if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
|
||
|
rc = dump_set_type(IPL_TYPE_CCW);
|
||
|
else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
|
||
|
rc = dump_set_type(IPL_TYPE_FCP);
|
||
|
return (rc != 0) ? rc : len;
|
||
|
}
|
||
|
|
||
|
static struct subsys_attribute dump_type_attr =
|
||
|
__ATTR(dump_type, 0644, dump_type_show, dump_type_store);
|
||
|
|
||
|
static decl_subsys(dump, NULL, NULL);
|
||
|
|
||
|
#ifdef CONFIG_SMP
|
||
|
static void dump_smp_stop_all(void)
|
||
|
{
|
||
|
int cpu;
|
||
|
preempt_disable();
|
||
|
for_each_online_cpu(cpu) {
|
||
|
if (cpu == smp_processor_id())
|
||
|
continue;
|
||
|
while (signal_processor(cpu, sigp_stop) == sigp_busy)
|
||
|
udelay(10);
|
||
|
}
|
||
|
preempt_enable();
|
||
|
}
|
||
|
#else
|
||
|
#define dump_smp_stop_all() do { } while (0)
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Shutdown actions section
|
||
|
*/
|
||
|
|
||
|
static decl_subsys(shutdown_actions, NULL, NULL);
|
||
|
|
||
|
/* on panic */
|
||
|
|
||
|
static ssize_t on_panic_show(struct subsystem *subsys, char *page)
|
||
|
{
|
||
|
return sprintf(page, "%s\n", shutdown_action_str(on_panic_action));
|
||
|
}
|
||
|
|
||
|
static ssize_t on_panic_store(struct subsystem *subsys, const char *buf,
|
||
|
size_t len)
|
||
|
{
|
||
|
if (strncmp(buf, SHUTDOWN_REIPL_STR, strlen(SHUTDOWN_REIPL_STR)) == 0)
|
||
|
on_panic_action = SHUTDOWN_REIPL;
|
||
|
else if (strncmp(buf, SHUTDOWN_DUMP_STR,
|
||
|
strlen(SHUTDOWN_DUMP_STR)) == 0)
|
||
|
on_panic_action = SHUTDOWN_DUMP;
|
||
|
else if (strncmp(buf, SHUTDOWN_STOP_STR,
|
||
|
strlen(SHUTDOWN_STOP_STR)) == 0)
|
||
|
on_panic_action = SHUTDOWN_STOP;
|
||
|
else
|
||
|
return -EINVAL;
|
||
|
|
||
|
return len;
|
||
|
}
|
||
|
|
||
|
static struct subsys_attribute on_panic_attr =
|
||
|
__ATTR(on_panic, 0644, on_panic_show, on_panic_store);
|
||
|
|
||
|
static void print_fcp_block(struct ipl_parameter_block *fcp_block)
|
||
|
{
|
||
|
printk(KERN_EMERG "wwpn: %016llx\n",
|
||
|
(unsigned long long)fcp_block->ipl_info.fcp.wwpn);
|
||
|
printk(KERN_EMERG "lun: %016llx\n",
|
||
|
(unsigned long long)fcp_block->ipl_info.fcp.lun);
|
||
|
printk(KERN_EMERG "bootprog: %lld\n",
|
||
|
(unsigned long long)fcp_block->ipl_info.fcp.bootprog);
|
||
|
printk(KERN_EMERG "br_lba: %lld\n",
|
||
|
(unsigned long long)fcp_block->ipl_info.fcp.br_lba);
|
||
|
printk(KERN_EMERG "device: %llx\n",
|
||
|
(unsigned long long)fcp_block->ipl_info.fcp.devno);
|
||
|
printk(KERN_EMERG "opt: %x\n", fcp_block->ipl_info.fcp.opt);
|
||
|
}
|
||
|
|
||
|
void do_reipl(void)
|
||
|
{
|
||
|
struct ccw_dev_id devid;
|
||
|
static char buf[100];
|
||
|
|
||
|
switch (reipl_type) {
|
||
|
case IPL_TYPE_CCW:
|
||
|
printk(KERN_EMERG "reboot on ccw device: 0.0.%04x\n",
|
||
|
reipl_block_ccw->ipl_info.ccw.devno);
|
||
|
break;
|
||
|
case IPL_TYPE_FCP:
|
||
|
printk(KERN_EMERG "reboot on fcp device:\n");
|
||
|
print_fcp_block(reipl_block_fcp);
|
||
|
break;
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
switch (reipl_method) {
|
||
|
case IPL_METHOD_CCW_CIO:
|
||
|
devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
|
||
|
devid.ssid = 0;
|
||
|
reipl_ccw_dev(&devid);
|
||
|
break;
|
||
|
case IPL_METHOD_CCW_VM:
|
||
|
sprintf(buf, "IPL %X", reipl_block_ccw->ipl_info.ccw.devno);
|
||
|
cpcmd(buf, NULL, 0, NULL);
|
||
|
break;
|
||
|
case IPL_METHOD_CCW_DIAG:
|
||
|
diag308(DIAG308_SET, reipl_block_ccw);
|
||
|
diag308(DIAG308_IPL, NULL);
|
||
|
break;
|
||
|
case IPL_METHOD_FCP_RW_DIAG:
|
||
|
diag308(DIAG308_SET, reipl_block_fcp);
|
||
|
diag308(DIAG308_IPL, NULL);
|
||
|
break;
|
||
|
case IPL_METHOD_FCP_RO_DIAG:
|
||
|
diag308(DIAG308_IPL, NULL);
|
||
|
break;
|
||
|
case IPL_METHOD_FCP_RO_VM:
|
||
|
cpcmd("IPL", NULL, 0, NULL);
|
||
|
break;
|
||
|
case IPL_METHOD_NONE:
|
||
|
default:
|
||
|
if (MACHINE_IS_VM)
|
||
|
cpcmd("IPL", NULL, 0, NULL);
|
||
|
diag308(DIAG308_IPL, NULL);
|
||
|
break;
|
||
|
}
|
||
|
panic("reipl failed!\n");
|
||
|
}
|
||
|
|
||
|
static void do_dump(void)
|
||
|
{
|
||
|
struct ccw_dev_id devid;
|
||
|
static char buf[100];
|
||
|
|
||
|
switch (dump_type) {
|
||
|
case IPL_TYPE_CCW:
|
||
|
printk(KERN_EMERG "Automatic dump on ccw device: 0.0.%04x\n",
|
||
|
dump_block_ccw->ipl_info.ccw.devno);
|
||
|
break;
|
||
|
case IPL_TYPE_FCP:
|
||
|
printk(KERN_EMERG "Automatic dump on fcp device:\n");
|
||
|
print_fcp_block(dump_block_fcp);
|
||
|
break;
|
||
|
default:
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
switch (dump_method) {
|
||
|
case IPL_METHOD_CCW_CIO:
|
||
|
dump_smp_stop_all();
|
||
|
devid.devno = dump_block_ccw->ipl_info.ccw.devno;
|
||
|
devid.ssid = 0;
|
||
|
reipl_ccw_dev(&devid);
|
||
|
break;
|
||
|
case IPL_METHOD_CCW_VM:
|
||
|
dump_smp_stop_all();
|
||
|
sprintf(buf, "STORE STATUS");
|
||
|
cpcmd(buf, NULL, 0, NULL);
|
||
|
sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
|
||
|
cpcmd(buf, NULL, 0, NULL);
|
||
|
break;
|
||
|
case IPL_METHOD_CCW_DIAG:
|
||
|
diag308(DIAG308_SET, dump_block_ccw);
|
||
|
diag308(DIAG308_DUMP, NULL);
|
||
|
break;
|
||
|
case IPL_METHOD_FCP_RW_DIAG:
|
||
|
diag308(DIAG308_SET, dump_block_fcp);
|
||
|
diag308(DIAG308_DUMP, NULL);
|
||
|
break;
|
||
|
case IPL_METHOD_NONE:
|
||
|
default:
|
||
|
return;
|
||
|
}
|
||
|
printk(KERN_EMERG "Dump failed!\n");
|
||
|
}
|
||
|
|
||
|
/* init functions */
|
||
|
|
||
|
static int __init ipl_register_fcp_files(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
rc = sysfs_create_group(&ipl_subsys.kset.kobj,
|
||
|
&ipl_fcp_attr_group);
|
||
|
if (rc)
|
||
|
goto out;
|
||
|
rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
|
||
|
&ipl_parameter_attr);
|
||
|
if (rc)
|
||
|
goto out_ipl_parm;
|
||
|
rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
|
||
|
&ipl_scp_data_attr);
|
||
|
if (!rc)
|
||
|
goto out;
|
||
|
|
||
|
sysfs_remove_bin_file(&ipl_subsys.kset.kobj, &ipl_parameter_attr);
|
||
|
|
||
|
out_ipl_parm:
|
||
|
sysfs_remove_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group);
|
||
|
out:
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static int __init ipl_init(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
rc = firmware_register(&ipl_subsys);
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
switch (ipl_get_type()) {
|
||
|
case IPL_TYPE_CCW:
|
||
|
rc = sysfs_create_group(&ipl_subsys.kset.kobj,
|
||
|
&ipl_ccw_attr_group);
|
||
|
break;
|
||
|
case IPL_TYPE_FCP:
|
||
|
rc = ipl_register_fcp_files();
|
||
|
break;
|
||
|
default:
|
||
|
rc = sysfs_create_group(&ipl_subsys.kset.kobj,
|
||
|
&ipl_unknown_attr_group);
|
||
|
break;
|
||
|
}
|
||
|
if (rc)
|
||
|
firmware_unregister(&ipl_subsys);
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static void __init reipl_probe(void)
|
||
|
{
|
||
|
void *buffer;
|
||
|
|
||
|
buffer = (void *) get_zeroed_page(GFP_KERNEL);
|
||
|
if (!buffer)
|
||
|
return;
|
||
|
if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
|
||
|
diag308_set_works = 1;
|
||
|
free_page((unsigned long)buffer);
|
||
|
}
|
||
|
|
||
|
static int __init reipl_ccw_init(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
|
||
|
if (!reipl_block_ccw)
|
||
|
return -ENOMEM;
|
||
|
rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_ccw_attr_group);
|
||
|
if (rc) {
|
||
|
free_page((unsigned long)reipl_block_ccw);
|
||
|
return rc;
|
||
|
}
|
||
|
reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
|
||
|
reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
|
||
|
reipl_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw);
|
||
|
reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
|
||
|
if (ipl_get_type() == IPL_TYPE_CCW)
|
||
|
reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
|
||
|
reipl_capabilities |= IPL_TYPE_CCW;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int __init reipl_fcp_init(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
if ((!diag308_set_works) && (ipl_get_type() != IPL_TYPE_FCP))
|
||
|
return 0;
|
||
|
if ((!diag308_set_works) && (ipl_get_type() == IPL_TYPE_FCP))
|
||
|
make_attrs_ro(reipl_fcp_attrs);
|
||
|
|
||
|
reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
|
||
|
if (!reipl_block_fcp)
|
||
|
return -ENOMEM;
|
||
|
rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_fcp_attr_group);
|
||
|
if (rc) {
|
||
|
free_page((unsigned long)reipl_block_fcp);
|
||
|
return rc;
|
||
|
}
|
||
|
if (ipl_get_type() == IPL_TYPE_FCP) {
|
||
|
memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
|
||
|
} else {
|
||
|
reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
|
||
|
reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
|
||
|
reipl_block_fcp->hdr.blk0_len =
|
||
|
sizeof(reipl_block_fcp->ipl_info.fcp);
|
||
|
reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
|
||
|
reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
|
||
|
}
|
||
|
reipl_capabilities |= IPL_TYPE_FCP;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int __init reipl_init(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
rc = firmware_register(&reipl_subsys);
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
rc = subsys_create_file(&reipl_subsys, &reipl_type_attr);
|
||
|
if (rc) {
|
||
|
firmware_unregister(&reipl_subsys);
|
||
|
return rc;
|
||
|
}
|
||
|
rc = reipl_ccw_init();
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
rc = reipl_fcp_init();
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
rc = reipl_set_type(ipl_get_type());
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int __init dump_ccw_init(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
|
||
|
if (!dump_block_ccw)
|
||
|
return -ENOMEM;
|
||
|
rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_ccw_attr_group);
|
||
|
if (rc) {
|
||
|
free_page((unsigned long)dump_block_ccw);
|
||
|
return rc;
|
||
|
}
|
||
|
dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
|
||
|
dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
|
||
|
dump_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw);
|
||
|
dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
|
||
|
dump_capabilities |= IPL_TYPE_CCW;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
extern char s390_readinfo_sccb[];
|
||
|
|
||
|
static int __init dump_fcp_init(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
if(!(s390_readinfo_sccb[91] & 0x2))
|
||
|
return 0; /* LDIPL DUMP is not installed */
|
||
|
if (!diag308_set_works)
|
||
|
return 0;
|
||
|
dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
|
||
|
if (!dump_block_fcp)
|
||
|
return -ENOMEM;
|
||
|
rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_fcp_attr_group);
|
||
|
if (rc) {
|
||
|
free_page((unsigned long)dump_block_fcp);
|
||
|
return rc;
|
||
|
}
|
||
|
dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
|
||
|
dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
|
||
|
dump_block_fcp->hdr.blk0_len = sizeof(dump_block_fcp->ipl_info.fcp);
|
||
|
dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
|
||
|
dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
|
||
|
dump_capabilities |= IPL_TYPE_FCP;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
#define SHUTDOWN_ON_PANIC_PRIO 0
|
||
|
|
||
|
static int shutdown_on_panic_notify(struct notifier_block *self,
|
||
|
unsigned long event, void *data)
|
||
|
{
|
||
|
if (on_panic_action == SHUTDOWN_DUMP)
|
||
|
do_dump();
|
||
|
else if (on_panic_action == SHUTDOWN_REIPL)
|
||
|
do_reipl();
|
||
|
return NOTIFY_OK;
|
||
|
}
|
||
|
|
||
|
static struct notifier_block shutdown_on_panic_nb = {
|
||
|
.notifier_call = shutdown_on_panic_notify,
|
||
|
.priority = SHUTDOWN_ON_PANIC_PRIO
|
||
|
};
|
||
|
|
||
|
static int __init dump_init(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
rc = firmware_register(&dump_subsys);
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
rc = subsys_create_file(&dump_subsys, &dump_type_attr);
|
||
|
if (rc) {
|
||
|
firmware_unregister(&dump_subsys);
|
||
|
return rc;
|
||
|
}
|
||
|
rc = dump_ccw_init();
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
rc = dump_fcp_init();
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
dump_set_type(IPL_TYPE_NONE);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int __init shutdown_actions_init(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
rc = firmware_register(&shutdown_actions_subsys);
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
rc = subsys_create_file(&shutdown_actions_subsys, &on_panic_attr);
|
||
|
if (rc) {
|
||
|
firmware_unregister(&shutdown_actions_subsys);
|
||
|
return rc;
|
||
|
}
|
||
|
atomic_notifier_chain_register(&panic_notifier_list,
|
||
|
&shutdown_on_panic_nb);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int __init s390_ipl_init(void)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
reipl_probe();
|
||
|
rc = ipl_init();
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
rc = reipl_init();
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
rc = dump_init();
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
rc = shutdown_actions_init();
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
__initcall(s390_ipl_init);
|