From 1303a35bfe153370cddb1b6e58e2287469e35f34 Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk Date: Thu, 8 Apr 2010 12:35:55 -0400 Subject: [PATCH] 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 Signed-off-by: Konrad Rzeszutek Wilk Tested-by: Mike Christie --- drivers/firmware/iscsi_ibft_find.c | 31 ++++++++++++++++++------------ 1 file changed, 19 insertions(+), 12 deletions(-) diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c index dd85555d3296..82a7a1566290 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); -- 2.20.1