diff options
Diffstat (limited to 'drivers/firmware/iscsi_ibft_find.c')
| -rw-r--r-- | drivers/firmware/iscsi_ibft_find.c | 48 |
1 files changed, 18 insertions, 30 deletions
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c index 64bb94523281..94b49ccd23ac 100644 --- a/drivers/firmware/iscsi_ibft_find.c +++ b/drivers/firmware/iscsi_ibft_find.c @@ -31,8 +31,8 @@ /* * Physical location of iSCSI Boot Format Table. */ -struct acpi_table_ibft *ibft_addr; -EXPORT_SYMBOL_GPL(ibft_addr); +phys_addr_t ibft_phys_addr; +EXPORT_SYMBOL_GPL(ibft_phys_addr); static const struct { char *sign; @@ -47,13 +47,24 @@ static const struct { #define VGA_MEM 0xA0000 /* VGA buffer */ #define VGA_SIZE 0x20000 /* 128kB */ -static int __init find_ibft_in_mem(void) +/* + * Routine used to find and reserve the iSCSI Boot Format Table + */ +void __init reserve_ibft_region(void) { unsigned long pos; unsigned int len = 0; void *virt; int i; + ibft_phys_addr = 0; + + /* iBFT 1.03 section 1.4.3.1 mandates that UEFI machines will + * only use ACPI for this + */ + if (efi_enabled(EFI_BOOT)) + return; + for (pos = IBFT_START; pos < IBFT_END; pos += 16) { /* The table can't be inside the VGA BIOS reserved space, * so skip that area */ @@ -70,35 +81,12 @@ static int __init find_ibft_in_mem(void) /* 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; - pr_info("iBFT found at 0x%lx.\n", pos); - goto done; + ibft_phys_addr = pos; + memblock_reserve(ibft_phys_addr, PAGE_ALIGN(len)); + pr_info("iBFT found at %pa.\n", &ibft_phys_addr); + return; } } } } -done: - 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; - - /* iBFT 1.03 section 1.4.3.1 mandates that UEFI machines will - * only use ACPI for this */ - - if (!efi_enabled(EFI_BOOT)) - find_ibft_in_mem(); - - if (ibft_addr) { - *sizep = PAGE_ALIGN(ibft_addr->header.length); - return (u64)virt_to_phys(ibft_addr); - } - - *sizep = 0; - return 0; } |