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authorKonrad Rzeszutek Wilk <konrad@kernel.org>2010-04-08 12:35:55 -0400
committerKonrad Rzeszutek Wilk <konrad@kernel.org>2010-05-11 13:02:37 -0400
commit1303a35bfe153370cddb1b6e58e2287469e35f34 (patch)
treeb0ed308023b36f1616a0b18cc18c3d12c8160bac /drivers/firmware
parent4e639fdf0d0d745648aa62228ab8a0d9c03a563f (diff)
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ibft: For UEFI machines actually do scan ACPI for iBFT.
For machines with IBFT 1.03 do scan the ACPI table for 'iBFT' or for 'IBFT'. If the machine is in UEFI mode, only do the ACPI table scan. For all other machines (pre IBFT 1.03) do a memory scan if not found in the ACPI tables. Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org> Tested-by: Mike Christie <michaelc@cs.wisc.edu>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/iscsi_ibft_find.c31
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
index dd85555d329..82a7a156629 100644
--- a/drivers/firmware/iscsi_ibft_find.c
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -57,23 +57,12 @@ static int __init acpi_find_ibft(struct acpi_table_header *header)
}
#endif /* CONFIG_ACPI */
-/*
- * Routine used to find the iSCSI Boot Format Table. The logical
- * kernel address is set in the ibft_addr global variable.
- */
-unsigned long __init find_ibft_region(unsigned long *sizep)
+static int __init find_ibft_in_mem(void)
{
unsigned long pos;
unsigned int len = 0;
void *virt;
- ibft_addr = NULL;
-
- /* iBFT 1.03 section 1.4.3.1 mandates that UEFI machines will
- * only use ACPI for this */
- if (efi_enabled)
- return 0;
-
for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
/* The table can't be inside the VGA BIOS reserved space,
* so skip that area */
@@ -92,6 +81,17 @@ unsigned long __init find_ibft_region(unsigned long *sizep)
}
}
}
+ return len;
+}
+/*
+ * Routine used to find the iSCSI Boot Format Table. The logical
+ * kernel address is set in the ibft_addr global variable.
+ */
+unsigned long __init find_ibft_region(unsigned long *sizep)
+{
+
+ ibft_addr = NULL;
+
#ifdef CONFIG_ACPI
/*
* One spec says "IBFT", the other says "iBFT". We have to check
@@ -102,6 +102,13 @@ unsigned long __init find_ibft_region(unsigned long *sizep)
if (!ibft_addr)
acpi_table_parse("iBFT", acpi_find_ibft);
#endif /* CONFIG_ACPI */
+
+ /* iBFT 1.03 section 1.4.3.1 mandates that UEFI machines will
+ * only use ACPI for this */
+
+ if (!ibft_addr && !efi_enabled)
+ find_ibft_in_mem();
+
if (ibft_addr) {
*sizep = PAGE_ALIGN(ibft_addr->header.length);
return (u64)isa_virt_to_bus(ibft_addr);