#include <linux/string.h>
#include <linux/bootmem.h>
#include <linux/slab.h>
-#include <asm/dmi.h>
#include <asm/desc.h>
-#include <asm/kdebug.h>
+#include <asm/cacheflush.h>
#define PCI_BIOS32_SD_VALUE 0x5F32335F /* "_32_" */
#define CRU_BIOS_SIGNATURE_VALUE 0x55524324
u8 reserved[5];
};
-/*
- * smbios_entry_point - defines SMBIOS entry point structure
- *
- * anchor[4] - anchor string (_SM_)
- * checksum - checksum of the entry point structure
- * length - length of the entry point structure
- * major_ver - major version (02h for revision 2.1)
- * minor_ver - minor version (01h for revision 2.1)
- * max_struct_size - size of the largest SMBIOS structure
- * revision - entry point structure revision implemented
- * formatted_area[5] - reserved
- * intermediate_anchor[5] - intermediate anchor string (_DMI_)
- * intermediate_checksum - intermediate checksum
- * table_length - structure table length
- * table_address - structure table address
- * table_num_structs - number of SMBIOS structures present
- * bcd_revision - BCD revision
- */
-struct smbios_entry_point {
- u8 anchor[4];
- u8 checksum;
- u8 length;
- u8 major_ver;
- u8 minor_ver;
- u16 max_struct_size;
- u8 revision;
- u8 formatted_area[5];
- u8 intermediate_anchor[5];
- u8 intermediate_checksum;
- u16 table_length;
- u32 table_address;
- u16 table_num_structs;
- u8 bcd_revision;
-};
-
/* type 212 */
struct smbios_cru64_info {
u8 type;
static int nowayout = WATCHDOG_NOWAYOUT;
static char expect_release;
static unsigned long hpwdt_is_open;
+static unsigned int allow_kdump;
static void __iomem *pci_mem_addr; /* the PCI-memory address */
static unsigned long __iomem *hpwdt_timer_reg;
};
MODULE_DEVICE_TABLE(pci, hpwdt_devices);
-/*
- * bios_checksum
- */
-static int __devinit bios_checksum(const char __iomem *ptr, int len)
-{
- char sum = 0;
- int i;
-
- /*
- * calculate checksum of size bytes. This should add up
- * to zero if we have a valid header.
- */
- for (i = 0; i < len; i++)
- sum += ptr[i];
-
- return ((sum == 0) && (len > 0));
-}
+extern asmlinkage void asminline_call(struct cmn_registers *pi86Regs, unsigned long *pRomEntry);
#ifndef CONFIG_X86_64
/* --32 Bit Bios------------------------------------------------------------ */
#define HPWDT_ARCH 32
-asmlinkage void asminline_call(struct cmn_registers *pi86Regs,
- unsigned long *pRomEntry)
-{
- asm("pushl %ebp \n\t"
- "movl %esp, %ebp \n\t"
- "pusha \n\t"
- "pushf \n\t"
- "push %es \n\t"
- "push %ds \n\t"
- "pop %es \n\t"
- "movl 8(%ebp),%eax \n\t"
- "movl 4(%eax),%ebx \n\t"
- "movl 8(%eax),%ecx \n\t"
- "movl 12(%eax),%edx \n\t"
- "movl 16(%eax),%esi \n\t"
- "movl 20(%eax),%edi \n\t"
- "movl (%eax),%eax \n\t"
- "push %cs \n\t"
- "call *12(%ebp) \n\t"
- "pushf \n\t"
- "pushl %eax \n\t"
- "movl 8(%ebp),%eax \n\t"
- "movl %ebx,4(%eax) \n\t"
- "movl %ecx,8(%eax) \n\t"
- "movl %edx,12(%eax) \n\t"
- "movl %esi,16(%eax) \n\t"
- "movl %edi,20(%eax) \n\t"
- "movw %ds,24(%eax) \n\t"
- "movw %es,26(%eax) \n\t"
- "popl %ebx \n\t"
- "movl %ebx,(%eax) \n\t"
- "popl %ebx \n\t"
- "movl %ebx,28(%eax) \n\t"
- "pop %es \n\t"
- "popf \n\t"
- "popa \n\t"
- "leave \n\t" "ret");
-}
+asm(".text \n\t"
+ ".align 4 \n"
+ "asminline_call: \n\t"
+ "pushl %ebp \n\t"
+ "movl %esp, %ebp \n\t"
+ "pusha \n\t"
+ "pushf \n\t"
+ "push %es \n\t"
+ "push %ds \n\t"
+ "pop %es \n\t"
+ "movl 8(%ebp),%eax \n\t"
+ "movl 4(%eax),%ebx \n\t"
+ "movl 8(%eax),%ecx \n\t"
+ "movl 12(%eax),%edx \n\t"
+ "movl 16(%eax),%esi \n\t"
+ "movl 20(%eax),%edi \n\t"
+ "movl (%eax),%eax \n\t"
+ "push %cs \n\t"
+ "call *12(%ebp) \n\t"
+ "pushf \n\t"
+ "pushl %eax \n\t"
+ "movl 8(%ebp),%eax \n\t"
+ "movl %ebx,4(%eax) \n\t"
+ "movl %ecx,8(%eax) \n\t"
+ "movl %edx,12(%eax) \n\t"
+ "movl %esi,16(%eax) \n\t"
+ "movl %edi,20(%eax) \n\t"
+ "movw %ds,24(%eax) \n\t"
+ "movw %es,26(%eax) \n\t"
+ "popl %ebx \n\t"
+ "movl %ebx,(%eax) \n\t"
+ "popl %ebx \n\t"
+ "movl %ebx,28(%eax) \n\t"
+ "pop %es \n\t"
+ "popf \n\t"
+ "popa \n\t"
+ "leave \n\t"
+ "ret \n\t"
+ ".previous");
+
/*
* cru_detect
if (cmn_regs.u1.ral != 0) {
printk(KERN_WARNING
- "hpwdt: Call succeeded but with an error: 0x%x\n",
- cmn_regs.u1.ral);
+ "hpwdt: Call succeeded but with an error: 0x%x\n",
+ cmn_regs.u1.ral);
} else {
physical_bios_base = cmn_regs.u2.rebx;
physical_bios_offset = cmn_regs.u4.redx;
cru_length = cmn_regs.u3.recx;
cru_physical_address =
- physical_bios_base + physical_bios_offset;
+ physical_bios_base + physical_bios_offset;
/* If the values look OK, then map it in. */
if ((physical_bios_base + physical_bios_offset)) {
cru_rom_addr =
- ioremap(cru_physical_address, cru_length);
+ ioremap(cru_physical_address, cru_length);
if (cru_rom_addr)
retval = 0;
}
}
/*
+ * bios_checksum
+ */
+static int __devinit bios_checksum(const char __iomem *ptr, int len)
+{
+ char sum = 0;
+ int i;
+
+ /*
+ * calculate checksum of size bytes. This should add up
+ * to zero if we have a valid header.
+ */
+ for (i = 0; i < len; i++)
+ sum += ptr[i];
+
+ return ((sum == 0) && (len > 0));
+}
+
+/*
* bios32_present
*
* Routine Description:
#define HPWDT_ARCH 64
-asmlinkage void asminline_call(struct cmn_registers *pi86Regs,
- unsigned long *pRomEntry)
-{
- asm("pushq %rbp \n\t"
- "movq %rsp, %rbp \n\t"
- "pushq %rax \n\t"
- "pushq %rbx \n\t"
- "pushq %rdx \n\t"
- "pushq %r12 \n\t"
- "pushq %r9 \n\t"
- "movq %rsi, %r12 \n\t"
- "movq %rdi, %r9 \n\t"
- "movl 4(%r9),%ebx \n\t"
- "movl 8(%r9),%ecx \n\t"
- "movl 12(%r9),%edx \n\t"
- "movl 16(%r9),%esi \n\t"
- "movl 20(%r9),%edi \n\t"
- "movl (%r9),%eax \n\t"
- "call *%r12 \n\t"
- "pushfq \n\t"
- "popq %r12 \n\t"
- "popfq \n\t"
- "movl %eax, (%r9) \n\t"
- "movl %ebx, 4(%r9) \n\t"
- "movl %ecx, 8(%r9) \n\t"
- "movl %edx, 12(%r9) \n\t"
- "movl %esi, 16(%r9) \n\t"
- "movl %edi, 20(%r9) \n\t"
- "movq %r12, %rax \n\t"
- "movl %eax, 28(%r9) \n\t"
- "popq %r9 \n\t"
- "popq %r12 \n\t"
- "popq %rdx \n\t"
- "popq %rbx \n\t"
- "popq %rax \n\t"
- "leave \n\t" "ret");
-}
+asm(".text \n\t"
+ ".align 4 \n"
+ "asminline_call: \n\t"
+ "pushq %rbp \n\t"
+ "movq %rsp, %rbp \n\t"
+ "pushq %rax \n\t"
+ "pushq %rbx \n\t"
+ "pushq %rdx \n\t"
+ "pushq %r12 \n\t"
+ "pushq %r9 \n\t"
+ "movq %rsi, %r12 \n\t"
+ "movq %rdi, %r9 \n\t"
+ "movl 4(%r9),%ebx \n\t"
+ "movl 8(%r9),%ecx \n\t"
+ "movl 12(%r9),%edx \n\t"
+ "movl 16(%r9),%esi \n\t"
+ "movl 20(%r9),%edi \n\t"
+ "movl (%r9),%eax \n\t"
+ "call *%r12 \n\t"
+ "pushfq \n\t"
+ "popq %r12 \n\t"
+ "movl %eax, (%r9) \n\t"
+ "movl %ebx, 4(%r9) \n\t"
+ "movl %ecx, 8(%r9) \n\t"
+ "movl %edx, 12(%r9) \n\t"
+ "movl %esi, 16(%r9) \n\t"
+ "movl %edi, 20(%r9) \n\t"
+ "movq %r12, %rax \n\t"
+ "movl %eax, 28(%r9) \n\t"
+ "popq %r9 \n\t"
+ "popq %r12 \n\t"
+ "popq %rdx \n\t"
+ "popq %rbx \n\t"
+ "popq %rax \n\t"
+ "leave \n\t"
+ "ret \n\t"
+ ".previous");
/*
* dmi_find_cru
*
* Routine Description:
- * This function checks wether or not a SMBIOS/DMI record is
+ * This function checks whether or not a SMBIOS/DMI record is
* the 64bit CRU info or not
- *
- * Return Value:
- * 0 : SUCCESS - if record found
- * <0 : FAILURE - if record not found
*/
static void __devinit dmi_find_cru(const struct dmi_header *dm)
{
smbios_cru64_ptr = (struct smbios_cru64_info *) dm;
if (smbios_cru64_ptr->signature == CRU_BIOS_SIGNATURE_VALUE) {
cru_physical_address =
- smbios_cru64_ptr->physical_address +
- smbios_cru64_ptr->double_offset;
+ smbios_cru64_ptr->physical_address +
+ smbios_cru64_ptr->double_offset;
cru_rom_addr = ioremap(cru_physical_address,
- smbios_cru64_ptr->double_length);
- }
- }
-}
-
-/*
- * dmi_table
- *
- * Routine Description:
- * Decode the SMBIOS/DMI table and check if we have a 64bit CRU record
- * or not.
- *
- * We have to be cautious here. We have seen BIOSes with DMI pointers
- * pointing to completely the wrong place for example
- */
-static void __devinit dmi_table(u8 *buf, int len, int num,
- void (*decode)(const struct dmi_header *))
-{
- u8 *data = buf;
- int i = 0;
-
- /*
- * Stop when we see all the items the table claimed to have
- * OR we run off the end of the table (also happens)
- */
- while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {
- const struct dmi_header *dm = (const struct dmi_header *)data;
-
- /*
- * We want to know the total length (formated area and strings)
- * before decoding to make sure we won't run off the table in
- * dmi_decode or dmi_string
- */
- data += dm->length;
- while ((data - buf < len - 1) && (data[0] || data[1]))
- data++;
- if (data - buf < len - 1)
- decode(dm);
- data += 2;
- i++;
- }
-}
-
-/*
- * smbios_present
- *
- * Routine Description:
- * This function parses the SMBIOS entry point table to retrieve
- * the 64 bit CRU Service.
- *
- * Return Value:
- * 0 : SUCCESS
- * <0 : FAILURE
- */
-static int __devinit smbios_present(const char __iomem *p)
-{
- struct smbios_entry_point *eps =
- (struct smbios_entry_point *) p;
- int length;
- u8 *buf;
-
- /* check if we have indeed the SMBIOS table entry point */
- if ((strncmp((char *)eps->anchor, "_SM_",
- sizeof(eps->anchor))) == 0) {
- length = eps->length;
-
- /* SMBIOS v2.1 implementation might use 0x1e */
- if ((length == 0x1e) &&
- (eps->major_ver == 2) &&
- (eps->minor_ver == 1))
- length = 0x1f;
-
- /*
- * Now we will check:
- * - SMBIOS checksum must be 0
- * - intermediate anchor should be _DMI_
- * - intermediate checksum should be 0
- */
- if ((bios_checksum(p, length)) &&
- (strncmp((char *)eps->intermediate_anchor, "_DMI_",
- sizeof(eps->intermediate_anchor)) == 0) &&
- (bios_checksum(p+0x10, 15))) {
- buf = ioremap(eps->table_address, eps->table_length);
- if (buf == NULL)
- return -ENODEV;
-
-
- /* Scan the DMI table for the 64 bit CRU service */
- dmi_table(buf, eps->table_length,
- eps->table_num_structs, dmi_find_cru);
-
- iounmap(buf);
- return 0;
+ smbios_cru64_ptr->double_length);
+ set_memory_x((unsigned long)cru_rom_addr & PAGE_MASK,
+ smbios_cru64_ptr->double_length >> PAGE_SHIFT);
}
}
-
- return -ENODEV;
-}
-
-static void __devinit smbios_scan_machine(void)
-{
- char __iomem *p, *q;
-
- if (efi_enabled) {
- if (efi.smbios == EFI_INVALID_TABLE_ADDR)
- return;
-
- p = ioremap(efi.smbios, 32);
- if (p == NULL)
- return;
-
- smbios_present(p);
- iounmap(p);
- } else {
- /*
- * Search from 0x0f0000 through 0x0fffff, inclusive.
- */
- p = ioremap(PCI_ROM_BASE1, ROM_SIZE);
- if (p == NULL)
- return;
-
- for (q = p; q < p + ROM_SIZE; q += 16)
- if (!smbios_present(q))
- break;
-
- iounmap(p);
- }
}
static int __devinit detect_cru_service(void)
{
cru_rom_addr = NULL;
- smbios_scan_machine(); /* will become dmi_walk(dmi_find_cru); */
+ dmi_walk(dmi_find_cru);
/* if cru_rom_addr has been set then we found a CRU service */
- return ((cru_rom_addr != NULL)? 0: -ENODEV);
+ return ((cru_rom_addr != NULL) ? 0 : -ENODEV);
}
/* ------------------------------------------------------------------------- */
#endif
/*
- * NMI Handler
- */
-static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
- void *data)
-{
- static unsigned long rom_pl;
- static int die_nmi_called;
-
- if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI)
- return NOTIFY_OK;
-
- spin_lock_irqsave(&rom_lock, rom_pl);
- if (!die_nmi_called)
- asminline_call(&cmn_regs, cru_rom_addr);
- die_nmi_called = 1;
- spin_unlock_irqrestore(&rom_lock, rom_pl);
- if (cmn_regs.u1.ral == 0) {
- printk(KERN_WARNING "hpwdt: An NMI occurred, "
- "but unable to determine source.\n");
- } else {
- panic("An NMI occurred, please see the Integrated "
- "Management Log for details.\n");
- }
-
- return NOTIFY_STOP;
-}
-
-/*
* Watchdog operations
*/
static void hpwdt_start(void)
}
/*
+ * NMI Handler
+ */
+static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
+ void *data)
+{
+ unsigned long rom_pl;
+ static int die_nmi_called;
+
+ if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI)
+ return NOTIFY_OK;
+
+ spin_lock_irqsave(&rom_lock, rom_pl);
+ if (!die_nmi_called)
+ asminline_call(&cmn_regs, cru_rom_addr);
+ die_nmi_called = 1;
+ spin_unlock_irqrestore(&rom_lock, rom_pl);
+ if (cmn_regs.u1.ral == 0) {
+ printk(KERN_WARNING "hpwdt: An NMI occurred, "
+ "but unable to determine source.\n");
+ } else {
+ if (allow_kdump)
+ hpwdt_stop();
+ panic("An NMI occurred, please see the Integrated "
+ "Management Log for details.\n");
+ }
+
+ return NOTIFY_OK;
+}
+
+/*
* /dev/watchdog handling
*/
static int hpwdt_open(struct inode *inode, struct file *file)
/* scan to see whether or not we got the magic char. */
for (i = 0; i != len; i++) {
char c;
- if (get_user(c, data+i))
+ if (get_user(c, data + i))
return -EFAULT;
if (c == 'V')
expect_release = 42;
*/
static int __devinit hpwdt_init_one(struct pci_dev *dev,
- const struct pci_device_id *ent)
+ const struct pci_device_id *ent)
{
int retval;
/*
* First let's find out if we are on an iLO2 server. We will
* not run on a legacy ASM box.
+ * So we only support the G5 ProLiant servers and higher.
*/
if (dev->subsystem_vendor != PCI_VENDOR_ID_HP) {
dev_warn(&dev->dev,
- "This server does not have an iLO2 ASIC.\n");
+ "This server does not have an iLO2 ASIC.\n");
return -ENODEV;
}
retval = detect_cru_service();
if (retval < 0) {
dev_warn(&dev->dev,
- "Unable to detect the %d Bit CRU Service.\n",
+ "Unable to detect the %d Bit CRU Service.\n",
HPWDT_ARCH);
goto error_get_cru;
}
retval = register_die_notifier(&die_notifier);
if (retval != 0) {
dev_warn(&dev->dev,
- "Unable to register a die notifier (err=%d).\n",
+ "Unable to register a die notifier (err=%d).\n",
retval);
goto error_die_notifier;
}
printk(KERN_INFO
"hp Watchdog Timer Driver: 1.00"
- ", timer margin: %d seconds( nowayout=%d).\n",
- soft_margin, nowayout);
+ ", timer margin: %d seconds (nowayout=%d)"
+ ", allow kernel dump: %s (default = 0/OFF).\n",
+ soft_margin, nowayout, (allow_kdump == 0) ? "OFF" : "ON");
return 0;
module_param(soft_margin, int, 0);
MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds");
+module_param(allow_kdump, int, 0);
+MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs");
+
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff