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ibft: Update iBFT handling for v1.03 of the spec.

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- Use struct acpi_table_ibft instead of struct ibft_table_header
- Don't do reserve_ibft_region() on UEFI machines (section 1.4.3.1)
- If ibft_addr isn't initialized when ibft_init() is called, check for
  ACPI-based tables.
- Fix compiler error when CONFIG_ACPI is not defined.

Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
This commit is contained in:
Peter Jones 2010-02-25 15:37:17 -05:00 committed by Konrad Rzeszutek Wilk
parent 94b849aaf6
commit 4e639fdf0d
3 changed files with 50 additions and 27 deletions
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30
drivers/firmware/iscsi_ibft.c
View File

@ -1,5 +1,5 @@
/* /*
* Copyright 2007 Red Hat, Inc. * Copyright 2007-2010 Red Hat, Inc.
* by Peter Jones <pjones@redhat.com> * by Peter Jones <pjones@redhat.com>
* Copyright 2008 IBM, Inc. * Copyright 2008 IBM, Inc.
* by Konrad Rzeszutek <konradr@linux.vnet.ibm.com> * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
@ -19,6 +19,9 @@
* *
* Changelog: * Changelog:
* *
* 06 Jan 2010 - Peter Jones <pjones@redhat.com>
* New changelog entries are in the git log from now on. Not here.
*
* 14 Mar 2008 - Konrad Rzeszutek <ketuzsezr@darnok.org> * 14 Mar 2008 - Konrad Rzeszutek <ketuzsezr@darnok.org>
* Updated comments and copyrights. (v0.4.9) * Updated comments and copyrights. (v0.4.9)
* *
@ -78,9 +81,10 @@
#include <linux/stat.h> #include <linux/stat.h>
#include <linux/string.h> #include <linux/string.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/acpi.h>
#define IBFT_ISCSI_VERSION "0.4.9" #define IBFT_ISCSI_VERSION "0.5.0"
#define IBFT_ISCSI_DATE "2008-Mar-14" #define IBFT_ISCSI_DATE "2010-Feb-25"
MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \ MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \
Konrad Rzeszutek <ketuzsezr@darnok.org>"); Konrad Rzeszutek <ketuzsezr@darnok.org>");
@ -238,7 +242,7 @@ static const char *ibft_initiator_properties[] =
*/ */
struct ibft_kobject { struct ibft_kobject {
struct ibft_table_header *header; struct acpi_table_ibft *header;
union { union {
struct ibft_initiator *initiator; struct ibft_initiator *initiator;
struct ibft_nic *nic; struct ibft_nic *nic;
@ -536,12 +540,13 @@ static int __init ibft_check_device(void)
u8 *pos; u8 *pos;
u8 csum = 0; u8 csum = 0;
len = ibft_addr->length; len = ibft_addr->header.length;
/* Sanity checking of iBFT. */ /* Sanity checking of iBFT. */
if (ibft_addr->revision != 1) { if (ibft_addr->header.revision != 1) {
printk(KERN_ERR "iBFT module supports only revision 1, " \ printk(KERN_ERR "iBFT module supports only revision 1, " \
"while this is %d.\n", ibft_addr->revision); "while this is %d.\n",
ibft_addr->header.revision);
return -ENOENT; return -ENOENT;
} }
for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++) for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++)
@ -558,7 +563,7 @@ static int __init ibft_check_device(void)
/* /*
* Helper function for ibft_register_kobjects. * Helper function for ibft_register_kobjects.
*/ */
static int __init ibft_create_kobject(struct ibft_table_header *header, static int __init ibft_create_kobject(struct acpi_table_ibft *header,
struct ibft_hdr *hdr, struct ibft_hdr *hdr,
struct list_head *list) struct list_head *list)
{ {
@ -596,7 +601,7 @@ static int __init ibft_create_kobject(struct ibft_table_header *header,
default: default:
printk(KERN_ERR "iBFT has unknown structure type (%d). " \ printk(KERN_ERR "iBFT has unknown structure type (%d). " \
"Report this bug to %.6s!\n", hdr->id, "Report this bug to %.6s!\n", hdr->id,
header->oem_id); header->header.oem_id);
rc = 1; rc = 1;
break; break;
} }
@ -649,7 +654,7 @@ out_invalid_struct:
* found add them on the passed-in list. We do not support the other * found add them on the passed-in list. We do not support the other
* fields at this point, so they are skipped. * fields at this point, so they are skipped.
*/ */
static int __init ibft_register_kobjects(struct ibft_table_header *header, static int __init ibft_register_kobjects(struct acpi_table_ibft *header,
struct list_head *list) struct list_head *list)
{ {
struct ibft_control *control = NULL; struct ibft_control *control = NULL;
@ -660,7 +665,7 @@ static int __init ibft_register_kobjects(struct ibft_table_header *header,
control = (void *)header + sizeof(*header); control = (void *)header + sizeof(*header);
end = (void *)control + control->hdr.length; end = (void *)control + control->hdr.length;
eot_offset = (void *)header + header->length - (void *)control; eot_offset = (void *)header + header->header.length - (void *)control;
rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control, rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control,
sizeof(*control)); sizeof(*control));
@ -672,7 +677,8 @@ static int __init ibft_register_kobjects(struct ibft_table_header *header,
} }
for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) { for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
offset = *(u16 *)ptr; offset = *(u16 *)ptr;
if (offset && offset < header->length && offset < eot_offset) { if (offset && offset < header->header.length &&
offset < eot_offset) {
rc = ibft_create_kobject(header, rc = ibft_create_kobject(header,
(void *)header + offset, (void *)header + offset,
list); list);

35
drivers/firmware/iscsi_ibft_find.c
View File

@ -1,5 +1,5 @@
/* /*
* Copyright 2007 Red Hat, Inc. * Copyright 2007-2010 Red Hat, Inc.
* by Peter Jones <pjones@redhat.com> * by Peter Jones <pjones@redhat.com>
* Copyright 2007 IBM, Inc. * Copyright 2007 IBM, Inc.
* by Konrad Rzeszutek <konradr@linux.vnet.ibm.com> * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
@ -22,6 +22,7 @@
#include <linux/blkdev.h> #include <linux/blkdev.h>
#include <linux/ctype.h> #include <linux/ctype.h>
#include <linux/device.h> #include <linux/device.h>
#include <linux/efi.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/limits.h> #include <linux/limits.h>
@ -30,13 +31,15 @@
#include <linux/stat.h> #include <linux/stat.h>
#include <linux/string.h> #include <linux/string.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/acpi.h>
#include <linux/iscsi_ibft.h>
#include <asm/mmzone.h> #include <asm/mmzone.h>
/* /*
* Physical location of iSCSI Boot Format Table. * Physical location of iSCSI Boot Format Table.
*/ */
struct ibft_table_header *ibft_addr; struct acpi_table_ibft *ibft_addr;
EXPORT_SYMBOL_GPL(ibft_addr); EXPORT_SYMBOL_GPL(ibft_addr);
#define IBFT_SIGN "iBFT" #define IBFT_SIGN "iBFT"
@ -46,6 +49,13 @@ EXPORT_SYMBOL_GPL(ibft_addr);
#define VGA_MEM 0xA0000 /* VGA buffer */ #define VGA_MEM 0xA0000 /* VGA buffer */
#define VGA_SIZE 0x20000 /* 128kB */ #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 * 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_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) { for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
/* The table can't be inside the VGA BIOS reserved space, /* The table can't be inside the VGA BIOS reserved space,
* so skip that area */ * 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, /* if the length of the table extends past 1M,
* the table cannot be valid. */ * the table cannot be valid. */
if (pos + len <= (IBFT_END-1)) { if (pos + len <= (IBFT_END-1)) {
ibft_addr = (struct ibft_table_header *)virt; ibft_addr = (struct acpi_table_ibft *)virt;
break; 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) { if (ibft_addr) {
*sizep = PAGE_ALIGN(len); *sizep = PAGE_ALIGN(ibft_addr->header.length);
return pos; return (u64)isa_virt_to_bus(ibft_addr);
} }
*sizep = 0; *sizep = 0;

12
include/linux/iscsi_ibft.h
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@ -21,21 +21,13 @@
#ifndef ISCSI_IBFT_H #ifndef ISCSI_IBFT_H
#define ISCSI_IBFT_H #define ISCSI_IBFT_H
struct ibft_table_header { #include <acpi/acpi.h>
char signature[4];
u32 length;
u8 revision;
u8 checksum;
char oem_id[6];
char oem_table_id[8];
char reserved[24];
} __attribute__((__packed__));
/* /*
* Logical location of iSCSI Boot Format Table. * Logical location of iSCSI Boot Format Table.
* If the value is NULL there is no iBFT on the machine. * If the value is NULL there is no iBFT on the machine.
*/ */
extern struct ibft_table_header *ibft_addr; extern struct acpi_table_ibft *ibft_addr;
/* /*
* Routine used to find and reserve the iSCSI Boot Format Table. The * Routine used to find and reserve the iSCSI Boot Format Table. The