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Merge branch 'stable/broadcom.ibft' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft-2.6 

* 'stable/broadcom.ibft' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft-2.6:
  iscsi_ibft: search for broadcom specific ibft sign (v2)
This commit is contained in:
Linus Torvalds 2011-05-19 16:14:02 -07:00
parent 6b55b90845 140363500d
commit dc93275150
1 changed files with 32 additions and 19 deletions
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51
drivers/firmware/iscsi_ibft_find.c
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@ -42,7 +42,20 @@
struct acpi_table_ibft *ibft_addr;
EXPORT_SYMBOL_GPL(ibft_addr);
#define IBFT_SIGN "iBFT"
static const struct {
char *sign;
} ibft_signs[] = {
#ifdef CONFIG_ACPI
/*
* One spec says "IBFT", the other says "iBFT". We have to check
* for both.
*/
{ ACPI_SIG_IBFT },
#endif
{ "iBFT" },
{ "BIFT" }, /* Broadcom iSCSI Offload */
};
#define IBFT_SIGN_LEN 4
#define IBFT_START 0x80000 /* 512kB */
#define IBFT_END 0x100000 /* 1MB */
@ -62,6 +75,7 @@ static int __init find_ibft_in_mem(void)
unsigned long pos;
unsigned int len = 0;
void *virt;
int i;
for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
/* The table can't be inside the VGA BIOS reserved space,
@ -69,18 +83,23 @@ static int __init find_ibft_in_mem(void)
if (pos == VGA_MEM)
pos += VGA_SIZE;
virt = isa_bus_to_virt(pos);
if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) {
unsigned long *addr =
(unsigned long *)isa_bus_to_virt(pos + 4);
len = *addr;
/* if the length of the table extends past 1M,
* the table cannot be valid. */
if (pos + len <= (IBFT_END-1)) {
ibft_addr = (struct acpi_table_ibft *)virt;
break;
for (i = 0; i < ARRAY_SIZE(ibft_signs); i++) {
if (memcmp(virt, ibft_signs[i].sign, IBFT_SIGN_LEN) ==
0) {
unsigned long *addr =
(unsigned long *)isa_bus_to_virt(pos + 4);
len = *addr;
/* if the length of the table extends past 1M,
* the table cannot be valid. */
if (pos + len <= (IBFT_END-1)) {
ibft_addr = (struct acpi_table_ibft *)virt;
goto done;
}
}
}
}
done:
return len;
}
/*
@ -89,18 +108,12 @@ static int __init find_ibft_in_mem(void)
*/
unsigned long __init find_ibft_region(unsigned long *sizep)
{
int i;
ibft_addr = NULL;
#ifdef CONFIG_ACPI
/*
* One spec says "IBFT", the other says "iBFT". We have to check
* for both.
*/
if (!ibft_addr)
acpi_table_parse(ACPI_SIG_IBFT, acpi_find_ibft);
if (!ibft_addr)
acpi_table_parse(IBFT_SIGN, acpi_find_ibft);
for (i = 0; i < ARRAY_SIZE(ibft_signs) && !ibft_addr; i++)
acpi_table_parse(ibft_signs[i].sign, acpi_find_ibft);
#endif /* CONFIG_ACPI */
/* iBFT 1.03 section 1.4.3.1 mandates that UEFI machines will