--- /dev/null
+/*
+ * arch/s390/kernel/ipl.c
+ * ipl/reipl/dump support for Linux on s390.
+ *
+ * Copyright (C) IBM Corp. 2005,2006
+ * 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 <asm/smp.h>
+#include <asm/setup.h>
+#include <asm/cpcmd.h>
+#include <asm/cio.h>
+#include <asm/ebcdic.h>
+#include <asm/reset.h>
+
+#define IPL_PARM_BLOCK_VERSION 0
+#define LOADPARM_LEN 8
+
+extern char s390_readinfo_sccb[];
+#define SCCB_VALID (*((__u16*)&s390_readinfo_sccb[6]) == 0x0010)
+#define SCCB_LOADPARM (&s390_readinfo_sccb[24])
+#define SCCB_FLAG (s390_readinfo_sccb[91])
+
+enum ipl_type {
+ IPL_TYPE_NONE = 1,
+ IPL_TYPE_UNKNOWN = 2,
+ IPL_TYPE_CCW = 4,
+ IPL_TYPE_FCP = 8,
+};
+
+#define IPL_NONE_STR "none"
+#define IPL_UNKNOWN_STR "unknown"
+#define IPL_CCW_STR "ccw"
+#define IPL_FCP_STR "fcp"
+
+static char *ipl_type_str(enum ipl_type type)
+{
+ switch (type) {
+ case IPL_TYPE_NONE:
+ return IPL_NONE_STR;
+ case IPL_TYPE_CCW:
+ return IPL_CCW_STR;
+ case IPL_TYPE_FCP:
+ return IPL_FCP_STR;
+ case IPL_TYPE_UNKNOWN:
+ default:
+ return IPL_UNKNOWN_STR;
+ }
+}
+
+enum ipl_method {
+ IPL_METHOD_NONE,
+ IPL_METHOD_CCW_CIO,
+ IPL_METHOD_CCW_DIAG,
+ IPL_METHOD_CCW_VM,
+ IPL_METHOD_FCP_RO_DIAG,
+ IPL_METHOD_FCP_RW_DIAG,
+ IPL_METHOD_FCP_RO_VM,
+};
+
+enum shutdown_action {
+ SHUTDOWN_REIPL,
+ SHUTDOWN_DUMP,
+ SHUTDOWN_STOP,
+};
+
+#define SHUTDOWN_REIPL_STR "reipl"
+#define SHUTDOWN_DUMP_STR "dump"
+#define SHUTDOWN_STOP_STR "stop"
+
+static char *shutdown_action_str(enum shutdown_action action)
+{
+ switch (action) {
+ case SHUTDOWN_REIPL:
+ return SHUTDOWN_REIPL_STR;
+ case SHUTDOWN_DUMP:
+ return SHUTDOWN_DUMP_STR;
+ case SHUTDOWN_STOP:
+ return SHUTDOWN_STOP_STR;
+ default:
+ BUG();
+ }
+}
+
+enum diag308_subcode {
+ DIAG308_IPL = 3,
+ DIAG308_DUMP = 4,
+ DIAG308_SET = 5,
+ DIAG308_STORE = 6,
+};
+
+enum diag308_ipl_type {
+ DIAG308_IPL_TYPE_FCP = 0,
+ DIAG308_IPL_TYPE_CCW = 2,
+};
+
+enum diag308_opt {
+ DIAG308_IPL_OPT_IPL = 0x10,
+ DIAG308_IPL_OPT_DUMP = 0x20,
+};
+
+enum diag308_rc {
+ DIAG308_RC_OK = 1,
+};
+
+static int diag308_set_works = 0;
+
+static int reipl_capabilities = IPL_TYPE_UNKNOWN;
+static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
+static enum ipl_method reipl_method = IPL_METHOD_NONE;
+static struct ipl_parameter_block *reipl_block_fcp;
+static struct ipl_parameter_block *reipl_block_ccw;
+
+static int dump_capabilities = IPL_TYPE_NONE;
+static enum ipl_type dump_type = IPL_TYPE_NONE;
+static enum ipl_method dump_method = IPL_METHOD_NONE;
+static struct ipl_parameter_block *dump_block_fcp;
+static struct ipl_parameter_block *dump_block_ccw;
+
+static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
+
+static 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;
+}
+
+/* SYSFS */
+
+#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
+static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
+ char *page) \
+{ \
+ return sprintf(page, _format, _value); \
+} \
+static struct subsys_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) \
+static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
+ char *page) \
+{ \
+ return sprintf(page, _fmt_out, \
+ (unsigned long long) _value); \
+} \
+static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\
+ 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 subsys_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 enum ipl_type ipl_get_type(void)
+{
+ struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
+
+ 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;
+ return IPL_TYPE_FCP;
+}
+
+static ssize_t ipl_type_show(struct subsystem *subsys, char *page)
+{
+ return sprintf(page, "%s\n", ipl_type_str(ipl_get_type()));
+}
+
+static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
+
+static ssize_t sys_ipl_device_show(struct subsystem *subsys, char *page)
+{
+ struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
+
+ switch (ipl_get_type()) {
+ case IPL_TYPE_CCW:
+ return sprintf(page, "0.0.%04x\n", ipl_devno);
+ case IPL_TYPE_FCP:
+ return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
+ default:
+ return 0;
+ }
+}
+
+static struct subsys_attribute sys_ipl_device_attr =
+ __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
+
+static ssize_t ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off,
+ size_t count)
+{
+ unsigned int size = IPL_PARMBLOCK_SIZE;
+
+ if (off > size)
+ return 0;
+ if (off + count > size)
+ count = size - off;
+ memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
+ return count;
+}
+
+static struct bin_attribute ipl_parameter_attr = {
+ .attr = {
+ .name = "binary_parameter",
+ .mode = S_IRUGO,
+ .owner = THIS_MODULE,
+ },
+ .size = PAGE_SIZE,
+ .read = &ipl_parameter_read,
+};
+
+static ssize_t ipl_scp_data_read(struct kobject *kobj, 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;
+
+ if (off > size)
+ return 0;
+ if (off + count > size)
+ count = size - off;
+ memcpy(buf, scp_data + off, count);
+ return count;
+}
+
+static struct bin_attribute ipl_scp_data_attr = {
+ .attr = {
+ .name = "scp_data",
+ .mode = S_IRUGO,
+ .owner = THIS_MODULE,
+ },
+ .size = PAGE_SIZE,
+ .read = &ipl_scp_data_read,
+};
+
+/* 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 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,
+ NULL,
+};
+
+static struct attribute_group ipl_fcp_attr_group = {
+ .attrs = ipl_fcp_attrs,
+};
+
+/* CCW ipl device attributes */
+
+static ssize_t ipl_ccw_loadparm_show(struct subsystem *subsys, char *page)
+{
+ char loadparm[LOADPARM_LEN + 1] = {};
+
+ if (!SCCB_VALID)
+ return sprintf(page, "#unknown#\n");
+ memcpy(loadparm, SCCB_LOADPARM, LOADPARM_LEN);
+ EBCASC(loadparm, LOADPARM_LEN);
+ strstrip(loadparm);
+ return sprintf(page, "%s\n", loadparm);
+}
+
+static struct subsys_attribute sys_ipl_ccw_loadparm_attr =
+ __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
+
+static struct attribute *ipl_ccw_attrs[] = {
+ &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 = {
+ .attrs = ipl_ccw_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 decl_subsys(ipl, NULL, NULL);
+
+/*
+ * reipl section
+ */
+
+/* FCP reipl device attributes */
+
+DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
+ reipl_block_fcp->ipl_info.fcp.wwpn);
+DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\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 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,
+ NULL,
+};
+
+static struct attribute_group reipl_fcp_attr_group = {
+ .name = IPL_FCP_STR,
+ .attrs = reipl_fcp_attrs,
+};
+
+/* CCW reipl device attributes */
+
+DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
+ reipl_block_ccw->ipl_info.ccw.devno);
+
+static void reipl_get_ascii_loadparm(char *loadparm)
+{
+ memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
+ LOADPARM_LEN);
+ EBCASC(loadparm, LOADPARM_LEN);
+ loadparm[LOADPARM_LEN] = 0;
+ strstrip(loadparm);
+}
+
+static ssize_t reipl_ccw_loadparm_show(struct subsystem *subsys, char *page)
+{
+ char buf[LOADPARM_LEN + 1];
+
+ reipl_get_ascii_loadparm(buf);
+ return sprintf(page, "%s\n", buf);
+}
+
+static ssize_t reipl_ccw_loadparm_store(struct subsystem *subsys,
+ 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(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
+ /* copy and convert to ebcdic */
+ memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
+ ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
+ return len;
+}
+
+static struct subsys_attribute sys_reipl_ccw_loadparm_attr =
+ __ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
+ reipl_ccw_loadparm_store);
+
+static struct attribute *reipl_ccw_attrs[] = {
+ &sys_reipl_ccw_device_attr.attr,
+ &sys_reipl_ccw_loadparm_attr.attr,
+ NULL,
+};
+
+static struct attribute_group reipl_ccw_attr_group = {
+ .name = IPL_CCW_STR,
+ .attrs = reipl_ccw_attrs,
+};
+
+/* reipl type */
+
+static int reipl_set_type(enum ipl_type type)
+{
+ if (!(reipl_capabilities & type))
+ return -EINVAL;
+
+ switch(type) {
+ case IPL_TYPE_CCW:
+ if (MACHINE_IS_VM)
+ reipl_method = IPL_METHOD_CCW_VM;
+ else
+ reipl_method = IPL_METHOD_CCW_CIO;
+ break;
+ case IPL_TYPE_FCP:
+ if (diag308_set_works)
+ reipl_method = IPL_METHOD_FCP_RW_DIAG;
+ else if (MACHINE_IS_VM)
+ reipl_method = IPL_METHOD_FCP_RO_VM;
+ else
+ reipl_method = IPL_METHOD_FCP_RO_DIAG;
+ break;
+ default:
+ reipl_method = IPL_METHOD_NONE;
+ }
+ reipl_type = type;
+ return 0;
+}
+
+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)
+ 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);
+
+/*
+ * 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);
+
+void do_reipl(void)
+{
+ struct ccw_dev_id devid;
+ static char buf[100];
+ char loadparm[LOADPARM_LEN + 1];
+
+ switch (reipl_method) {
+ case IPL_METHOD_CCW_CIO:
+ devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
+ if (ipl_get_type() == IPL_TYPE_CCW && devid.devno == ipl_devno)
+ diag308(DIAG308_IPL, NULL);
+ devid.ssid = 0;
+ reipl_ccw_dev(&devid);
+ break;
+ case IPL_METHOD_CCW_VM:
+ reipl_get_ascii_loadparm(loadparm);
+ if (strlen(loadparm) == 0)
+ sprintf(buf, "IPL %X",
+ reipl_block_ccw->ipl_info.ccw.devno);
+ else
+ sprintf(buf, "IPL %X LOADPARM '%s'",
+ reipl_block_ccw->ipl_info.ccw.devno, loadparm);
+ __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;
+ }
+ signal_processor(smp_processor_id(), sigp_stop_and_store_status);
+}
+
+static void do_dump(void)
+{
+ struct ccw_dev_id devid;
+ static char buf[100];
+
+ switch (dump_method) {
+ case IPL_METHOD_CCW_CIO:
+ smp_send_stop();
+ devid.devno = dump_block_ccw->ipl_info.ccw.devno;
+ devid.ssid = 0;
+ reipl_ccw_dev(&devid);
+ break;
+ case IPL_METHOD_CCW_VM:
+ smp_send_stop();
+ 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;
+ /* check if read scp info worked and set loadparm */
+ if (SCCB_VALID)
+ memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
+ SCCB_LOADPARM, LOADPARM_LEN);
+ else
+ /* read scp info failed: set empty loadparm (EBCDIC blanks) */
+ memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
+ LOADPARM_LEN);
+ /* FIXME: check for diag308_set_works when enabling diag ccw reipl */
+ if (!MACHINE_IS_VM)
+ sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
+ 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;
+}
+
+static int __init dump_fcp_init(void)
+{
+ int rc;
+
+ if(!(SCCB_FLAG & 0x2) || !SCCB_VALID)
+ 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);
+
+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;
+
+ list_for_each_entry(reset, &rcall, list)
+ reset->fn();
+}
+
+extern void reset_mcck_handler(void);
+extern void reset_pgm_handler(void);
+extern __u32 dump_prefix_page;
+
+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;
+
+ /* Save prefix page address for dump case */
+ dump_prefix_page = (unsigned long) lc;
+
+ /* 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_MCHECK;
+ S390_lowcore.mcck_new_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) &reset_mcck_handler;
+
+ /* Set new program check handler */
+ S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS & ~PSW_MASK_MCHECK;
+ S390_lowcore.program_new_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) &reset_pgm_handler;
+
+ do_reset_calls();
+}
git://git.onelab.eu / linux-2.6.git / blobdiff