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OpenCloudOS-Kernel/arch/s390/kernel/ipl.c

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/*
* ipl/reipl/dump support for Linux on s390.
*
* Copyright IBM Corp. 2005, 2012
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com>
* Volker Sameske <sameske@de.ibm.com>
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/reboot.h>
#include <linux/ctype.h>
#include <linux/fs.h>
#include <linux/gfp.h>
#include <linux/crash_dump.h>
#include <linux/debug_locks.h>
#include <asm/diag.h>
#include <asm/ipl.h>
#include <asm/smp.h>
#include <asm/setup.h>
#include <asm/cpcmd.h>
#include <asm/cio.h>
#include <asm/ebcdic.h>
#include <asm/reset.h>
#include <asm/sclp.h>
#include <asm/checksum.h>
#include <asm/debug.h>
#include <asm/os_info.h>
#include "entry.h"
#define IPL_PARM_BLOCK_VERSION 0
#define IPL_UNKNOWN_STR "unknown"
#define IPL_CCW_STR "ccw"
#define IPL_FCP_STR "fcp"
#define IPL_FCP_DUMP_STR "fcp_dump"
#define IPL_NSS_STR "nss"
#define DUMP_CCW_STR "ccw"
#define DUMP_FCP_STR "fcp"
#define DUMP_NONE_STR "none"
/*
* Four shutdown trigger types are supported:
* - panic
* - halt
* - power off
* - reipl
* - restart
*/
#define ON_PANIC_STR "on_panic"
#define ON_HALT_STR "on_halt"
#define ON_POFF_STR "on_poff"
#define ON_REIPL_STR "on_reboot"
#define ON_RESTART_STR "on_restart"
struct shutdown_action;
struct shutdown_trigger {
char *name;
struct shutdown_action *action;
};
/*
* The following shutdown action types are supported:
*/
#define SHUTDOWN_ACTION_IPL_STR "ipl"
#define SHUTDOWN_ACTION_REIPL_STR "reipl"
#define SHUTDOWN_ACTION_DUMP_STR "dump"
#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
#define SHUTDOWN_ACTION_STOP_STR "stop"
#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
struct shutdown_action {
char *name;
void (*fn) (struct shutdown_trigger *trigger);
int (*init) (void);
int init_rc;
};
static char *ipl_type_str(enum ipl_type type)
{
switch (type) {
case IPL_TYPE_CCW:
return IPL_CCW_STR;
case IPL_TYPE_FCP:
return IPL_FCP_STR;
case IPL_TYPE_FCP_DUMP:
return IPL_FCP_DUMP_STR;
case IPL_TYPE_NSS:
return IPL_NSS_STR;
case IPL_TYPE_UNKNOWN:
default:
return IPL_UNKNOWN_STR;
}
}
enum dump_type {
DUMP_TYPE_NONE = 1,
DUMP_TYPE_CCW = 2,
DUMP_TYPE_FCP = 4,
};
static char *dump_type_str(enum dump_type type)
{
switch (type) {
case DUMP_TYPE_NONE:
return DUMP_NONE_STR;
case DUMP_TYPE_CCW:
return DUMP_CCW_STR;
case DUMP_TYPE_FCP:
return DUMP_FCP_STR;
default:
return NULL;
}
}
/*
* Must be in data section since the bss section
* is not cleared when these are accessed.
*/
static u8 ipl_ssid __attribute__((__section__(".data"))) = 0;
static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
u32 ipl_flags __attribute__((__section__(".data"))) = 0;
enum ipl_method {
REIPL_METHOD_CCW_CIO,
REIPL_METHOD_CCW_DIAG,
REIPL_METHOD_CCW_VM,
REIPL_METHOD_FCP_RO_DIAG,
REIPL_METHOD_FCP_RW_DIAG,
REIPL_METHOD_FCP_RO_VM,
REIPL_METHOD_FCP_DUMP,
REIPL_METHOD_NSS,
REIPL_METHOD_NSS_DIAG,
REIPL_METHOD_DEFAULT,
};
enum dump_method {
DUMP_METHOD_NONE,
DUMP_METHOD_CCW_CIO,
DUMP_METHOD_CCW_DIAG,
DUMP_METHOD_CCW_VM,
DUMP_METHOD_FCP_DIAG,
};
static int diag308_set_works = 0;
static struct ipl_parameter_block ipl_block;
static int reipl_capabilities = IPL_TYPE_UNKNOWN;
static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
static struct ipl_parameter_block *reipl_block_fcp;
static struct ipl_parameter_block *reipl_block_ccw;
static struct ipl_parameter_block *reipl_block_nss;
static struct ipl_parameter_block *reipl_block_actual;
static int dump_capabilities = DUMP_TYPE_NONE;
static enum dump_type dump_type = DUMP_TYPE_NONE;
static enum dump_method dump_method = DUMP_METHOD_NONE;
static struct ipl_parameter_block *dump_block_fcp;
static struct ipl_parameter_block *dump_block_ccw;
static struct sclp_ipl_info sclp_ipl_info;
static inline int __diag308(unsigned long subcode, void *addr)
{
register unsigned long _addr asm("0") = (unsigned long) addr;
register unsigned long _rc asm("1") = 0;
asm volatile(
" diag %0,%2,0x308\n"
"0:\n"
EX_TABLE(0b,0b)
: "+d" (_addr), "+d" (_rc)
: "d" (subcode) : "cc", "memory");
return _rc;
}
int diag308(unsigned long subcode, void *addr)
{
diag_stat_inc(DIAG_STAT_X308);
return __diag308(subcode, addr);
}
EXPORT_SYMBOL_GPL(diag308);
/* SYSFS */
#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
struct kobj_attribute *attr, \
char *page) \
{ \
return snprintf(page, PAGE_SIZE, _format, ##args); \
}
#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t len) \
{ \
unsigned long long ssid, devno; \
\
if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
return -EINVAL; \
\
if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
return -EINVAL; \
\
_ipl_blk.ssid = ssid; \
_ipl_blk.devno = devno; \
return len; \
}
#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
_ipl_blk.ssid, _ipl_blk.devno); \
IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name, (S_IRUGO | S_IWUSR), \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store) \
#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t len) \
{ \
unsigned long long value; \
if (sscanf(buf, _fmt_in, &value) != 1) \
return -EINVAL; \
_value = value; \
return len; \
} \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name,(S_IRUGO | S_IWUSR), \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store)
#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t len) \
{ \
strncpy(_value, buf, sizeof(_value) - 1); \
strim(_value); \
return len; \
} \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name,(S_IRUGO | S_IWUSR), \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store)
static void make_attrs_ro(struct attribute **attrs)
{
while (*attrs) {
(*attrs)->mode = S_IRUGO;
attrs++;
}
}
/*
* ipl section
*/
static __init enum ipl_type get_ipl_type(void)
{
struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
if (ipl_flags & IPL_NSS_VALID)
return IPL_TYPE_NSS;
if (!(ipl_flags & IPL_DEVNO_VALID))
return IPL_TYPE_UNKNOWN;
if (!(ipl_flags & IPL_PARMBLOCK_VALID))
return IPL_TYPE_CCW;
if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
return IPL_TYPE_UNKNOWN;
if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
return IPL_TYPE_UNKNOWN;
if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
return IPL_TYPE_FCP_DUMP;
return IPL_TYPE_FCP;
}
struct ipl_info ipl_info;
EXPORT_SYMBOL_GPL(ipl_info);
static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
char *page)
{
return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
}
static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
/* VM IPL PARM routines */
static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
const struct ipl_parameter_block *ipb)
{
int i;
size_t len;
char has_lowercase = 0;
len = 0;
if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
(ipb->ipl_info.ccw.vm_parm_len > 0)) {
len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
/* If at least one character is lowercase, we assume mixed
* case; otherwise we convert everything to lowercase.
*/
for (i = 0; i < len; i++)
if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
(dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
(dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
has_lowercase = 1;
break;
}
if (!has_lowercase)
EBC_TOLOWER(dest, len);
EBCASC(dest, len);
}
dest[len] = 0;
return len;
}
size_t append_ipl_vmparm(char *dest, size_t size)
{
size_t rc;
rc = 0;
if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
else
dest[0] = 0;
return rc;
}
static ssize_t ipl_vm_parm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
char parm[DIAG308_VMPARM_SIZE + 1] = {};
append_ipl_vmparm(parm, sizeof(parm));
return sprintf(page, "%s\n", parm);
}
static size_t scpdata_length(const char* buf, size_t count)
{
while (count) {
if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
break;
count--;
}
return count;
}
static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
const struct ipl_parameter_block *ipb)
{
size_t count;
size_t i;
int has_lowercase;
count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
ipb->ipl_info.fcp.scp_data_len));
if (!count)
goto out;
has_lowercase = 0;
for (i = 0; i < count; i++) {
if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
count = 0;
goto out;
}
if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
has_lowercase = 1;
}
if (has_lowercase)
memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
else
for (i = 0; i < count; i++)
dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
out:
dest[count] = '\0';
return count;
}
size_t append_ipl_scpdata(char *dest, size_t len)
{
size_t rc;
rc = 0;
if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
else
dest[0] = 0;
return rc;
}
static struct kobj_attribute sys_ipl_vm_parm_attr =
__ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
static ssize_t sys_ipl_device_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
switch (ipl_info.type) {
case IPL_TYPE_CCW:
return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
default:
return 0;
}
}
static struct kobj_attribute sys_ipl_device_attr =
__ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
IPL_PARMBLOCK_SIZE);
}
static struct bin_attribute ipl_parameter_attr =
__BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
PAGE_SIZE);
static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static struct bin_attribute ipl_scp_data_attr =
__BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
static struct bin_attribute *ipl_fcp_bin_attrs[] = {
&ipl_parameter_attr,
&ipl_scp_data_attr,
NULL,
};
/* FCP ipl device attributes */
DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
IPL_PARMBLOCK_START->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
char loadparm[LOADPARM_LEN + 1] = {};
if (!sclp_ipl_info.is_valid)
return sprintf(page, "#unknown#\n");
memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
EBCASC(loadparm, LOADPARM_LEN);
strim(loadparm);
return sprintf(page, "%s\n", loadparm);
}
static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
__ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
static struct attribute *ipl_fcp_attrs[] = {
&sys_ipl_type_attr.attr,
&sys_ipl_device_attr.attr,
&sys_ipl_fcp_wwpn_attr.attr,
&sys_ipl_fcp_lun_attr.attr,
&sys_ipl_fcp_bootprog_attr.attr,
&sys_ipl_fcp_br_lba_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
NULL,
};
static struct attribute_group ipl_fcp_attr_group = {
.attrs = ipl_fcp_attrs,
.bin_attrs = ipl_fcp_bin_attrs,
};
/* CCW ipl device attributes */
static struct attribute *ipl_ccw_attrs_vm[] = {
&sys_ipl_type_attr.attr,
&sys_ipl_device_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
&sys_ipl_vm_parm_attr.attr,
NULL,
};
static struct attribute *ipl_ccw_attrs_lpar[] = {
&sys_ipl_type_attr.attr,
&sys_ipl_device_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
NULL,
};
static struct attribute_group ipl_ccw_attr_group_vm = {
.attrs = ipl_ccw_attrs_vm,
};
static struct attribute_group ipl_ccw_attr_group_lpar = {
.attrs = ipl_ccw_attrs_lpar
};
/* NSS ipl device attributes */
DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
static struct attribute *ipl_nss_attrs[] = {
&sys_ipl_type_attr.attr,
&sys_ipl_nss_name_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
&sys_ipl_vm_parm_attr.attr,
NULL,
};
static struct attribute_group ipl_nss_attr_group = {
.attrs = ipl_nss_attrs,
};
/* UNKNOWN ipl device attributes */
static struct attribute *ipl_unknown_attrs[] = {
&sys_ipl_type_attr.attr,
NULL,
};
static struct attribute_group ipl_unknown_attr_group = {
.attrs = ipl_unknown_attrs,
};
static struct kset *ipl_kset;
static void __ipl_run(void *unused)
{
diag308(DIAG308_IPL, NULL);
if (MACHINE_IS_VM)
__cpcmd("IPL", NULL, 0, NULL);
else if (ipl_info.type == IPL_TYPE_CCW)
reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
}
static void ipl_run(struct shutdown_trigger *trigger)
{
smp_call_ipl_cpu(__ipl_run, NULL);
}
static int __init ipl_init(void)
{
int rc;
ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
if (!ipl_kset) {
rc = -ENOMEM;
goto out;
}
switch (ipl_info.type) {
case IPL_TYPE_CCW:
if (MACHINE_IS_VM)
rc = sysfs_create_group(&ipl_kset->kobj,
&ipl_ccw_attr_group_vm);
else
rc = sysfs_create_group(&ipl_kset->kobj,
&ipl_ccw_attr_group_lpar);
break;
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
break;
case IPL_TYPE_NSS:
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
break;
default:
rc = sysfs_create_group(&ipl_kset->kobj,
&ipl_unknown_attr_group);
break;
}
out:
if (rc)
panic("ipl_init failed: rc = %i\n", rc);
return 0;
}
static struct shutdown_action __refdata ipl_action = {
.name = SHUTDOWN_ACTION_IPL_STR,
.fn = ipl_run,
.init = ipl_init,
};
/*
* reipl shutdown action: Reboot Linux on shutdown.
*/
/* VM IPL PARM attributes */
static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
char *page)
{
char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
return sprintf(page, "%s\n", vmparm);
}
static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
size_t vmparm_max,
const char *buf, size_t len)
{
int i, ip_len;
/* ignore trailing newline */
ip_len = len;
if ((len > 0) && (buf[len - 1] == '\n'))
ip_len--;
if (ip_len > vmparm_max)
return -EINVAL;
/* parm is used to store kernel options, check for common chars */
for (i = 0; i < ip_len; i++)
if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
return -EINVAL;
memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
ipb->ipl_info.ccw.vm_parm_len = ip_len;
if (ip_len > 0) {
ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
} else {
ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
}
return len;
}
/* NSS wrapper */
static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return reipl_generic_vmparm_show(reipl_block_nss, page);
}
static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
}
/* CCW wrapper */
static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return reipl_generic_vmparm_show(reipl_block_ccw, page);
}
static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
}
static struct kobj_attribute sys_reipl_nss_vmparm_attr =
__ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
reipl_nss_vmparm_store);
static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
__ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
reipl_ccw_vmparm_store);
/* FCP reipl device attributes */
static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t scpdata_len = count;
size_t padding;
if (off)
return -EINVAL;
memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
if (scpdata_len % 8) {
padding = 8 - (scpdata_len % 8);
memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
0, padding);
scpdata_len += padding;
}
reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
return count;
}
static struct bin_attribute sys_reipl_fcp_scp_data_attr =
__BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
static struct bin_attribute *reipl_fcp_bin_attrs[] = {
&sys_reipl_fcp_scp_data_attr,
NULL,
};
DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
reipl_block_fcp->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
reipl_block_fcp->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
reipl_block_fcp->ipl_info.fcp.bootprog);
DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
reipl_block_fcp->ipl_info.fcp.br_lba);
DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
reipl_block_fcp->ipl_info.fcp.devno);
static void reipl_get_ascii_loadparm(char *loadparm,
struct ipl_parameter_block *ibp)
{
memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
EBCASC(loadparm, LOADPARM_LEN);
loadparm[LOADPARM_LEN] = 0;
strim(loadparm);
}
static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
char *page)
{
char buf[LOADPARM_LEN + 1];
reipl_get_ascii_loadparm(buf, ipb);
return sprintf(page, "%s\n", buf);
}
static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
const char *buf, size_t len)
{
int i, lp_len;
/* ignore trailing newline */
lp_len = len;
if ((len > 0) && (buf[len - 1] == '\n'))
lp_len--;
/* loadparm can have max 8 characters and must not start with a blank */
if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
return -EINVAL;
/* loadparm can only contain "a-z,A-Z,0-9,SP,." */
for (i = 0; i < lp_len; i++) {
if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
(buf[i] == '.'))
continue;
return -EINVAL;
}
/* initialize loadparm with blanks */
memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
/* copy and convert to ebcdic */
memcpy(ipb->hdr.loadparm, buf, lp_len);
ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
return len;
}
/* FCP wrapper */
static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return reipl_generic_loadparm_show(reipl_block_fcp, page);
}
static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
}
static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
__ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
reipl_fcp_loadparm_store);
static struct attribute *reipl_fcp_attrs[] = {
&sys_reipl_fcp_device_attr.attr,
&sys_reipl_fcp_wwpn_attr.attr,
&sys_reipl_fcp_lun_attr.attr,
&sys_reipl_fcp_bootprog_attr.attr,
&sys_reipl_fcp_br_lba_attr.attr,
&sys_reipl_fcp_loadparm_attr.attr,
NULL,
};
static struct attribute_group reipl_fcp_attr_group = {
.attrs = reipl_fcp_attrs,
.bin_attrs = reipl_fcp_bin_attrs,
};
/* CCW reipl device attributes */
DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
/* NSS wrapper */
static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return reipl_generic_loadparm_show(reipl_block_nss, page);
}
static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
}
/* CCW wrapper */
static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return reipl_generic_loadparm_show(reipl_block_ccw, page);
}
static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
}
static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
__ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
reipl_ccw_loadparm_store);
static struct attribute *reipl_ccw_attrs_vm[] = {
&sys_reipl_ccw_device_attr.attr,
&sys_reipl_ccw_loadparm_attr.attr,
&sys_reipl_ccw_vmparm_attr.attr,
NULL,
};
static struct attribute *reipl_ccw_attrs_lpar[] = {
&sys_reipl_ccw_device_attr.attr,
&sys_reipl_ccw_loadparm_attr.attr,
NULL,
};
static struct attribute_group reipl_ccw_attr_group_vm = {
.name = IPL_CCW_STR,
.attrs = reipl_ccw_attrs_vm,
};
static struct attribute_group reipl_ccw_attr_group_lpar = {
.name = IPL_CCW_STR,
.attrs = reipl_ccw_attrs_lpar,
};
/* NSS reipl device attributes */
static void reipl_get_ascii_nss_name(char *dst,
struct ipl_parameter_block *ipb)
{
memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
EBCASC(dst, NSS_NAME_SIZE);
dst[NSS_NAME_SIZE] = 0;
}
static ssize_t reipl_nss_name_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
char nss_name[NSS_NAME_SIZE + 1] = {};
reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
return sprintf(page, "%s\n", nss_name);
}
static ssize_t reipl_nss_name_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
int nss_len;
/* ignore trailing newline */
nss_len = len;
if ((len > 0) && (buf[len - 1] == '\n'))
nss_len--;
if (nss_len > NSS_NAME_SIZE)
return -EINVAL;
memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
if (nss_len > 0) {
reipl_block_nss->ipl_info.ccw.vm_flags |=
DIAG308_VM_FLAGS_NSS_VALID;
memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
} else {
reipl_block_nss->ipl_info.ccw.vm_flags &=
~DIAG308_VM_FLAGS_NSS_VALID;
}
return len;
}
static struct kobj_attribute sys_reipl_nss_name_attr =
__ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
reipl_nss_name_store);
static struct kobj_attribute sys_reipl_nss_loadparm_attr =
__ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
reipl_nss_loadparm_store);
static struct attribute *reipl_nss_attrs[] = {
&sys_reipl_nss_name_attr.attr,
&sys_reipl_nss_loadparm_attr.attr,
&sys_reipl_nss_vmparm_attr.attr,
NULL,
};
static struct attribute_group reipl_nss_attr_group = {
.name = IPL_NSS_STR,
.attrs = reipl_nss_attrs,
};
static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
{
reipl_block_actual = reipl_block;
os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
reipl_block->hdr.len);
}
/* reipl type */
static int reipl_set_type(enum ipl_type type)
{
if (!(reipl_capabilities & type))
return -EINVAL;
switch(type) {
case IPL_TYPE_CCW:
if (diag308_set_works)
reipl_method = REIPL_METHOD_CCW_DIAG;
else if (MACHINE_IS_VM)
reipl_method = REIPL_METHOD_CCW_VM;
else
reipl_method = REIPL_METHOD_CCW_CIO;
set_reipl_block_actual(reipl_block_ccw);
break;
case IPL_TYPE_FCP:
if (diag308_set_works)
reipl_method = REIPL_METHOD_FCP_RW_DIAG;
else if (MACHINE_IS_VM)
reipl_method = REIPL_METHOD_FCP_RO_VM;
else
reipl_method = REIPL_METHOD_FCP_RO_DIAG;
set_reipl_block_actual(reipl_block_fcp);
break;
case IPL_TYPE_FCP_DUMP:
reipl_method = REIPL_METHOD_FCP_DUMP;
break;
case IPL_TYPE_NSS:
if (diag308_set_works)
reipl_method = REIPL_METHOD_NSS_DIAG;
else
reipl_method = REIPL_METHOD_NSS;
set_reipl_block_actual(reipl_block_nss);
break;
case IPL_TYPE_UNKNOWN:
reipl_method = REIPL_METHOD_DEFAULT;
break;
default:
BUG();
}
reipl_type = type;
return 0;
}
static ssize_t reipl_type_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", ipl_type_str(reipl_type));
}
static ssize_t reipl_type_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
int rc = -EINVAL;
if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
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);
else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_NSS);
return (rc != 0) ? rc : len;
}
static struct kobj_attribute reipl_type_attr =
__ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
static struct kset *reipl_kset;
static struct kset *reipl_fcp_kset;
static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
const enum ipl_method m)
{
char loadparm[LOADPARM_LEN + 1] = {};
char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
char nss_name[NSS_NAME_SIZE + 1] = {};
size_t pos = 0;
reipl_get_ascii_loadparm(loadparm, ipb);
reipl_get_ascii_nss_name(nss_name, ipb);
reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
switch (m) {
case REIPL_METHOD_CCW_VM:
pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
break;
case REIPL_METHOD_NSS:
pos = sprintf(dst, "IPL %s", nss_name);
break;
default:
break;
}
if (strlen(loadparm) > 0)
pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
if (strlen(vmparm) > 0)
sprintf(dst + pos, " PARM %s", vmparm);
}
static void __reipl_run(void *unused)
{
struct ccw_dev_id devid;
static char buf[128];
switch (reipl_method) {
case REIPL_METHOD_CCW_CIO:
devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
reipl_ccw_dev(&devid);
break;
case REIPL_METHOD_CCW_VM:
get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
__cpcmd(buf, NULL, 0, NULL);
break;
case REIPL_METHOD_CCW_DIAG:
diag308(DIAG308_SET, reipl_block_ccw);
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_FCP_RW_DIAG:
diag308(DIAG308_SET, reipl_block_fcp);
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_FCP_RO_DIAG:
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_FCP_RO_VM:
__cpcmd("IPL", NULL, 0, NULL);
break;
case REIPL_METHOD_NSS_DIAG:
diag308(DIAG308_SET, reipl_block_nss);
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_NSS:
get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
__cpcmd(buf, NULL, 0, NULL);
break;
case REIPL_METHOD_DEFAULT:
if (MACHINE_IS_VM)
__cpcmd("IPL", NULL, 0, NULL);
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_FCP_DUMP:
break;
}
disabled_wait((unsigned long) __builtin_return_address(0));
}
static void reipl_run(struct shutdown_trigger *trigger)
{
smp_call_ipl_cpu(__reipl_run, NULL);
}
static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
{
ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
}
static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
{
/* LOADPARM */
/* check if read scp info worked and set loadparm */
if (sclp_ipl_info.is_valid)
memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
else
/* read scp info failed: set empty loadparm (EBCDIC blanks) */
memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
/* VM PARM */
if (MACHINE_IS_VM && diag308_set_works &&
(ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
ipb->ipl_info.ccw.vm_parm_len =
ipl_block.ipl_info.ccw.vm_parm_len;
memcpy(ipb->ipl_info.ccw.vm_parm,
ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
}
}
static int __init reipl_nss_init(void)
{
int rc;
if (!MACHINE_IS_VM)
return 0;
reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
if (!reipl_block_nss)
return -ENOMEM;
if (!diag308_set_works)
sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
if (rc)
return rc;
reipl_block_ccw_init(reipl_block_nss);
if (ipl_info.type == IPL_TYPE_NSS) {
memset(reipl_block_nss->ipl_info.ccw.nss_name,
' ', NSS_NAME_SIZE);
memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
kernel_nss_name, strlen(kernel_nss_name));
ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
reipl_block_nss->ipl_info.ccw.vm_flags |=
DIAG308_VM_FLAGS_NSS_VALID;
reipl_block_ccw_fill_parms(reipl_block_nss);
}
reipl_capabilities |= IPL_TYPE_NSS;
return 0;
}
static int __init reipl_ccw_init(void)
{
int rc;
reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
if (!reipl_block_ccw)
return -ENOMEM;
if (MACHINE_IS_VM) {
if (!diag308_set_works)
sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
rc = sysfs_create_group(&reipl_kset->kobj,
&reipl_ccw_attr_group_vm);
} else {
if(!diag308_set_works)
sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
rc = sysfs_create_group(&reipl_kset->kobj,
&reipl_ccw_attr_group_lpar);
}
if (rc)
return rc;
reipl_block_ccw_init(reipl_block_ccw);
if (ipl_info.type == IPL_TYPE_CCW) {
reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
reipl_block_ccw_fill_parms(reipl_block_ccw);
}
reipl_capabilities |= IPL_TYPE_CCW;
return 0;
}
static int __init reipl_fcp_init(void)
{
int rc;
if (!diag308_set_works) {
if (ipl_info.type == IPL_TYPE_FCP) {
make_attrs_ro(reipl_fcp_attrs);
sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
} else
return 0;
}
reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
if (!reipl_block_fcp)
return -ENOMEM;
/* sysfs: create fcp kset for mixing attr group and bin attrs */
reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
&reipl_kset->kobj);
if (!reipl_fcp_kset) {
free_page((unsigned long) reipl_block_fcp);
return -ENOMEM;
}
rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
if (rc) {
kset_unregister(reipl_fcp_kset);
free_page((unsigned long) reipl_block_fcp);
return rc;
}
if (ipl_info.type == IPL_TYPE_FCP) {
memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
/*
* Fix loadparm: There are systems where the (SCSI) LOADPARM
* is invalid in the SCSI IPL parameter block, so take it
* always from sclp_ipl_info.
*/
memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
LOADPARM_LEN);
} 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 = IPL_PARM_BLK0_FCP_LEN;
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_type_init(void)
{
enum ipl_type reipl_type = ipl_info.type;
struct ipl_parameter_block *reipl_block;
unsigned long size;
reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
if (!reipl_block)
goto out;
/*
* If we have an OS info reipl block, this will be used
*/
if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
memcpy(reipl_block_fcp, reipl_block, size);
reipl_type = IPL_TYPE_FCP;
} else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
memcpy(reipl_block_ccw, reipl_block, size);
reipl_type = IPL_TYPE_CCW;
}
out:
return reipl_set_type(reipl_type);
}
static int __init reipl_init(void)
{
int rc;
reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
if (!reipl_kset)
return -ENOMEM;
rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
if (rc) {
kset_unregister(reipl_kset);
return rc;
}
rc = reipl_ccw_init();
if (rc)
return rc;
rc = reipl_fcp_init();
if (rc)
return rc;
rc = reipl_nss_init();
if (rc)
return rc;
return reipl_type_init();
}
static struct shutdown_action __refdata reipl_action = {
.name = SHUTDOWN_ACTION_REIPL_STR,
.fn = reipl_run,
.init = reipl_init,
};
/*
* dump shutdown action: Dump Linux on shutdown.
*/
/* FCP dump device attributes */
DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
dump_block_fcp->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\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_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
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 dump_type type)
{
if (!(dump_capabilities & type))
return -EINVAL;
switch (type) {
case DUMP_TYPE_CCW:
if (diag308_set_works)
dump_method = DUMP_METHOD_CCW_DIAG;
else if (MACHINE_IS_VM)
dump_method = DUMP_METHOD_CCW_VM;
else
dump_method = DUMP_METHOD_CCW_CIO;
break;
case DUMP_TYPE_FCP:
dump_method = DUMP_METHOD_FCP_DIAG;
break;
default:
dump_method = DUMP_METHOD_NONE;
}
dump_type = type;
return 0;
}
static ssize_t dump_type_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", dump_type_str(dump_type));
}
static ssize_t dump_type_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
int rc = -EINVAL;
if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_NONE);
else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_CCW);
else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_FCP);
return (rc != 0) ? rc : len;
}
static struct kobj_attribute dump_type_attr =
__ATTR(dump_type, 0644, dump_type_show, dump_type_store);
static struct kset *dump_kset;
static void diag308_dump(void *dump_block)
{
diag308(DIAG308_SET, dump_block);
while (1) {
if (diag308(DIAG308_DUMP, NULL) != 0x302)
break;
udelay_simple(USEC_PER_SEC);
}
}
static void __dump_run(void *unused)
{
struct ccw_dev_id devid;
static char buf[100];
switch (dump_method) {
case DUMP_METHOD_CCW_CIO:
devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
devid.devno = dump_block_ccw->ipl_info.ccw.devno;
reipl_ccw_dev(&devid);
break;
case DUMP_METHOD_CCW_VM:
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 DUMP_METHOD_CCW_DIAG:
diag308_dump(dump_block_ccw);
break;
case DUMP_METHOD_FCP_DIAG:
diag308_dump(dump_block_fcp);
break;
default:
break;
}
}
static void dump_run(struct shutdown_trigger *trigger)
{
if (dump_method == DUMP_METHOD_NONE)
return;
smp_send_stop();
smp_call_ipl_cpu(__dump_run, NULL);
}
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_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 = IPL_PARM_BLK0_CCW_LEN;
dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
dump_capabilities |= DUMP_TYPE_CCW;
return 0;
}
static int __init dump_fcp_init(void)
{
int rc;
if (!sclp_ipl_info.has_dump)
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_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 = IPL_PARM_BLK0_FCP_LEN;
dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
dump_capabilities |= DUMP_TYPE_FCP;
return 0;
}
static int __init dump_init(void)
{
int rc;
dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
if (!dump_kset)
return -ENOMEM;
rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
if (rc) {
kset_unregister(dump_kset);
return rc;
}
rc = dump_ccw_init();
if (rc)
return rc;
rc = dump_fcp_init();
if (rc)
return rc;
dump_set_type(DUMP_TYPE_NONE);
return 0;
}
static struct shutdown_action __refdata dump_action = {
.name = SHUTDOWN_ACTION_DUMP_STR,
.fn = dump_run,
.init = dump_init,
};
static void dump_reipl_run(struct shutdown_trigger *trigger)
{
unsigned long ipib = (unsigned long) reipl_block_actual;
unsigned int csum;
csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
mem_assign_absolute(S390_lowcore.ipib, ipib);
mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
dump_run(trigger);
}
static int __init dump_reipl_init(void)
{
if (!diag308_set_works)
return -EOPNOTSUPP;
else
return 0;
}
static struct shutdown_action __refdata dump_reipl_action = {
.name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
.fn = dump_reipl_run,
.init = dump_reipl_init,
};
/*
* vmcmd shutdown action: Trigger vm command on shutdown.
*/
static char vmcmd_on_reboot[128];
static char vmcmd_on_panic[128];
static char vmcmd_on_halt[128];
static char vmcmd_on_poff[128];
static char vmcmd_on_restart[128];
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
static struct attribute *vmcmd_attrs[] = {
&sys_vmcmd_on_reboot_attr.attr,
&sys_vmcmd_on_panic_attr.attr,
&sys_vmcmd_on_halt_attr.attr,
&sys_vmcmd_on_poff_attr.attr,
&sys_vmcmd_on_restart_attr.attr,
NULL,
};
static struct attribute_group vmcmd_attr_group = {
.attrs = vmcmd_attrs,
};
static struct kset *vmcmd_kset;
static void vmcmd_run(struct shutdown_trigger *trigger)
{
char *cmd;
if (strcmp(trigger->name, ON_REIPL_STR) == 0)
cmd = vmcmd_on_reboot;
else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
cmd = vmcmd_on_panic;
else if (strcmp(trigger->name, ON_HALT_STR) == 0)
cmd = vmcmd_on_halt;
else if (strcmp(trigger->name, ON_POFF_STR) == 0)
cmd = vmcmd_on_poff;
else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
cmd = vmcmd_on_restart;
else
return;
if (strlen(cmd) == 0)
return;
__cpcmd(cmd, NULL, 0, NULL);
}
static int vmcmd_init(void)
{
if (!MACHINE_IS_VM)
return -EOPNOTSUPP;
vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
if (!vmcmd_kset)
return -ENOMEM;
return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
}
static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
vmcmd_run, vmcmd_init};
/*
* stop shutdown action: Stop Linux on shutdown.
*/
static void stop_run(struct shutdown_trigger *trigger)
{
if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
strcmp(trigger->name, ON_RESTART_STR) == 0)
disabled_wait((unsigned long) __builtin_return_address(0));
smp_stop_cpu();
}
static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
stop_run, NULL};
/* action list */
static struct shutdown_action *shutdown_actions_list[] = {
&ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
&vmcmd_action, &stop_action};
#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
/*
* Trigger section
*/
static struct kset *shutdown_actions_kset;
static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
size_t len)
{
int i;
for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
if (shutdown_actions_list[i]->init_rc) {
return shutdown_actions_list[i]->init_rc;
} else {
trigger->action = shutdown_actions_list[i];
return len;
}
}
}
return -EINVAL;
}
/* on reipl */
static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
&reipl_action};
static ssize_t on_reboot_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_reboot_trigger.action->name);
}
static ssize_t on_reboot_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_reboot_trigger, len);
}
static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
static void do_machine_restart(char *__unused)
{
smp_send_stop();
on_reboot_trigger.action->fn(&on_reboot_trigger);
reipl_run(NULL);
}
void (*_machine_restart)(char *command) = do_machine_restart;
/* on panic */
static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
static ssize_t on_panic_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_panic_trigger.action->name);
}
static ssize_t on_panic_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_panic_trigger, len);
}
static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
static void do_panic(void)
{
lgr_info_log();
on_panic_trigger.action->fn(&on_panic_trigger);
stop_run(&on_panic_trigger);
}
/* on restart */
static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
&stop_action};
static ssize_t on_restart_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_restart_trigger.action->name);
}
static ssize_t on_restart_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_restart_trigger, len);
}
static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
static void __do_restart(void *ignore)
{
__arch_local_irq_stosm(0x04); /* enable DAT */
smp_send_stop();
#ifdef CONFIG_CRASH_DUMP
crash_kexec(NULL);
#endif
on_restart_trigger.action->fn(&on_restart_trigger);
stop_run(&on_restart_trigger);
}
void do_restart(void)
{
tracing_off();
debug_locks_off();
lgr_info_log();
smp_call_online_cpu(__do_restart, NULL);
}
/* on halt */
static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
static ssize_t on_halt_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_halt_trigger.action->name);
}
static ssize_t on_halt_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_halt_trigger, len);
}
static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
static void do_machine_halt(void)
{
smp_send_stop();
on_halt_trigger.action->fn(&on_halt_trigger);
stop_run(&on_halt_trigger);
}
void (*_machine_halt)(void) = do_machine_halt;
/* on power off */
static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
static ssize_t on_poff_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_poff_trigger.action->name);
}
static ssize_t on_poff_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_poff_trigger, len);
}
static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
static void do_machine_power_off(void)
{
smp_send_stop();
on_poff_trigger.action->fn(&on_poff_trigger);
stop_run(&on_poff_trigger);
}
void (*_machine_power_off)(void) = do_machine_power_off;
static struct attribute *shutdown_action_attrs[] = {
&on_restart_attr.attr,
&on_reboot_attr.attr,
&on_panic_attr.attr,
&on_halt_attr.attr,
&on_poff_attr.attr,
NULL,
};
static struct attribute_group shutdown_action_attr_group = {
.attrs = shutdown_action_attrs,
};
static void __init shutdown_triggers_init(void)
{
shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
firmware_kobj);
if (!shutdown_actions_kset)
goto fail;
if (sysfs_create_group(&shutdown_actions_kset->kobj,
&shutdown_action_attr_group))
goto fail;
return;
fail:
panic("shutdown_triggers_init failed\n");
}
static void __init shutdown_actions_init(void)
{
int i;
for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
if (!shutdown_actions_list[i]->init)
continue;
shutdown_actions_list[i]->init_rc =
shutdown_actions_list[i]->init();
}
}
static int __init s390_ipl_init(void)
{
char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
sclp_get_ipl_info(&sclp_ipl_info);
/*
* Fix loadparm: There are systems where the (SCSI) LOADPARM
* returned by read SCP info is invalid (contains EBCDIC blanks)
* when the system has been booted via diag308. In that case we use
* the value from diag308, if available.
*
* There are also systems where diag308 store does not work in
* case the system is booted from HMC. Fortunately in this case
* READ SCP info provides the correct value.
*/
if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
diag308_set_works)
memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
LOADPARM_LEN);
shutdown_actions_init();
shutdown_triggers_init();
return 0;
}
__initcall(s390_ipl_init);
static void __init strncpy_skip_quote(char *dst, char *src, int n)
{
int sx, dx;
dx = 0;
for (sx = 0; src[sx] != 0; sx++) {
if (src[sx] == '"')
continue;
dst[dx++] = src[sx];
if (dx >= n)
break;
}
}
static int __init vmcmd_on_reboot_setup(char *str)
{
if (!MACHINE_IS_VM)
return 1;
strncpy_skip_quote(vmcmd_on_reboot, str, 127);
vmcmd_on_reboot[127] = 0;
on_reboot_trigger.action = &vmcmd_action;
return 1;
}
__setup("vmreboot=", vmcmd_on_reboot_setup);
static int __init vmcmd_on_panic_setup(char *str)
{
if (!MACHINE_IS_VM)
return 1;
strncpy_skip_quote(vmcmd_on_panic, str, 127);
vmcmd_on_panic[127] = 0;
on_panic_trigger.action = &vmcmd_action;
return 1;
}
__setup("vmpanic=", vmcmd_on_panic_setup);
static int __init vmcmd_on_halt_setup(char *str)
{
if (!MACHINE_IS_VM)
return 1;
strncpy_skip_quote(vmcmd_on_halt, str, 127);
vmcmd_on_halt[127] = 0;
on_halt_trigger.action = &vmcmd_action;
return 1;
}
__setup("vmhalt=", vmcmd_on_halt_setup);
static int __init vmcmd_on_poff_setup(char *str)
{
if (!MACHINE_IS_VM)
return 1;
strncpy_skip_quote(vmcmd_on_poff, str, 127);
vmcmd_on_poff[127] = 0;
on_poff_trigger.action = &vmcmd_action;
return 1;
}
__setup("vmpoff=", vmcmd_on_poff_setup);
static int on_panic_notify(struct notifier_block *self,
unsigned long event, void *data)
{
do_panic();
return NOTIFY_OK;
}
static struct notifier_block on_panic_nb = {
.notifier_call = on_panic_notify,
.priority = INT_MIN,
};
void __init setup_ipl(void)
{
ipl_info.type = get_ipl_type();
switch (ipl_info.type) {
case IPL_TYPE_CCW:
ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
ipl_info.data.ccw.dev_id.devno = ipl_devno;
break;
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
ipl_info.data.fcp.dev_id.ssid = 0;
ipl_info.data.fcp.dev_id.devno =
IPL_PARMBLOCK_START->ipl_info.fcp.devno;
ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
break;
case IPL_TYPE_NSS:
strncpy(ipl_info.data.nss.name, kernel_nss_name,
sizeof(ipl_info.data.nss.name));
break;
case IPL_TYPE_UNKNOWN:
/* We have no info to copy */
break;
}
atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
}
void __init ipl_update_parameters(void)
{
int rc;
rc = diag308(DIAG308_STORE, &ipl_block);
if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
diag308_set_works = 1;
}
void __init ipl_save_parameters(void)
{
struct cio_iplinfo iplinfo;
void *src, *dst;
if (cio_get_iplinfo(&iplinfo))
return;
ipl_ssid = iplinfo.ssid;
ipl_devno = iplinfo.devno;
ipl_flags |= IPL_DEVNO_VALID;
if (!iplinfo.is_qdio)
return;
ipl_flags |= IPL_PARMBLOCK_VALID;
src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
dst = (void *)IPL_PARMBLOCK_ORIGIN;
memmove(dst, src, PAGE_SIZE);
S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
}
static LIST_HEAD(rcall);
static DEFINE_MUTEX(rcall_mutex);
void register_reset_call(struct reset_call *reset)
{
mutex_lock(&rcall_mutex);
list_add(&reset->list, &rcall);
mutex_unlock(&rcall_mutex);
}
EXPORT_SYMBOL_GPL(register_reset_call);
void unregister_reset_call(struct reset_call *reset)
{
mutex_lock(&rcall_mutex);
list_del(&reset->list);
mutex_unlock(&rcall_mutex);
}
EXPORT_SYMBOL_GPL(unregister_reset_call);
static void do_reset_calls(void)
{
struct reset_call *reset;
if (diag308_set_works) {
diag308_reset();
return;
}
list_for_each_entry(reset, &rcall, list)
reset->fn();
}
void s390_reset_system(void)
{
struct lowcore *lc;
lc = (struct lowcore *)(unsigned long) store_prefix();
/* Stack for interrupt/machine check handler */
lc->panic_stack = S390_lowcore.panic_stack;
/* Disable prefixing */
set_prefix(0);
/* Disable lowcore protection */
__ctl_clear_bit(0,28);
/* Set new machine check handler */
S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
S390_lowcore.mcck_new_psw.addr =
(unsigned long) s390_base_mcck_handler;
/* Set new program check handler */
S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
S390_lowcore.program_new_psw.addr =
(unsigned long) s390_base_pgm_handler;
/*
* Clear subchannel ID and number to signal new kernel that no CCW or
* SCSI IPL has been done (for kexec and kdump)
*/
S390_lowcore.subchannel_id = 0;
S390_lowcore.subchannel_nr = 0;
do_reset_calls();
}
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