diff options
Diffstat (limited to 'drivers/firmware/iscsi_ibft_find.c')
| -rw-r--r-- | drivers/firmware/iscsi_ibft_find.c | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c index d6470ef36e4a..dd85555d3296 100644 --- a/drivers/firmware/iscsi_ibft_find.c +++ b/drivers/firmware/iscsi_ibft_find.c @@ -1,5 +1,5 @@ /* - * Copyright 2007 Red Hat, Inc. + * Copyright 2007-2010 Red Hat, Inc. * by Peter Jones <pjones@redhat.com> * Copyright 2007 IBM, Inc. * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com> @@ -22,6 +22,7 @@ #include <linux/blkdev.h> #include <linux/ctype.h> #include <linux/device.h> +#include <linux/efi.h> #include <linux/err.h> #include <linux/init.h> #include <linux/limits.h> @@ -30,13 +31,15 @@ #include <linux/stat.h> #include <linux/string.h> #include <linux/types.h> +#include <linux/acpi.h> +#include <linux/iscsi_ibft.h> #include <asm/mmzone.h> /* * Physical location of iSCSI Boot Format Table. */ -struct ibft_table_header *ibft_addr; +struct acpi_table_ibft *ibft_addr; EXPORT_SYMBOL_GPL(ibft_addr); #define IBFT_SIGN "iBFT" @@ -46,6 +49,13 @@ EXPORT_SYMBOL_GPL(ibft_addr); #define VGA_MEM 0xA0000 /* VGA buffer */ #define VGA_SIZE 0x20000 /* 128kB */ +#ifdef CONFIG_ACPI +static int __init acpi_find_ibft(struct acpi_table_header *header) +{ + ibft_addr = (struct acpi_table_ibft *)header; + return 0; +} +#endif /* CONFIG_ACPI */ /* * Routine used to find the iSCSI Boot Format Table. The logical @@ -59,6 +69,11 @@ unsigned long __init find_ibft_region(unsigned long *sizep) 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 */ @@ -72,14 +87,24 @@ unsigned long __init find_ibft_region(unsigned long *sizep) /* if the length of the table extends past 1M, * the table cannot be valid. */ if (pos + len <= (IBFT_END-1)) { - ibft_addr = (struct ibft_table_header *)virt; + ibft_addr = (struct acpi_table_ibft *)virt; break; } } } +#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", acpi_find_ibft); +#endif /* CONFIG_ACPI */ if (ibft_addr) { - *sizep = PAGE_ALIGN(len); - return pos; + *sizep = PAGE_ALIGN(ibft_addr->header.length); + return (u64)isa_virt_to_bus(ibft_addr); } *sizep = 0; |