[gPXE-devel] [PATCH 1/2] ibft: Update iBFT handling for v1.03 of the spec.
Konrad Rzeszutek Wilk
konrad at kernel.org
Fri Apr 9 10:21:27 EDT 2010
From: Peter Jones <pjones at redhat.com>
- 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.
Author: Peter Jones <pjones at redhat.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad at kernel.org>
Reviewed-by: Mike Christie <michaelc at cs.wisc.edu>
---
drivers/firmware/iscsi_ibft.c | 30 ++++++++++++++++++------------
drivers/firmware/iscsi_ibft_find.c | 34 +++++++++++++++++++++++++++++-----
include/linux/iscsi_ibft.h | 12 ++----------
3 files changed, 49 insertions(+), 27 deletions(-)
diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
index ed2801c..b3ab24f 100644
--- a/drivers/firmware/iscsi_ibft.c
+++ b/drivers/firmware/iscsi_ibft.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2007 Red Hat, Inc.
+ * Copyright 2007-2010 Red Hat, Inc.
* by Peter Jones <pjones at redhat.com>
* Copyright 2008 IBM, Inc.
* by Konrad Rzeszutek <konradr at linux.vnet.ibm.com>
@@ -19,6 +19,9 @@
*
* Changelog:
*
+ * 06 Jan 2010 - Peter Jones <pjones at redhat.com>
+ * New changelog entries are in the git log from now on. Not here.
+ *
* 14 Mar 2008 - Konrad Rzeszutek <ketuzsezr at darnok.org>
* Updated comments and copyrights. (v0.4.9)
*
@@ -78,9 +81,10 @@
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/types.h>
+#include <linux/acpi.h>
-#define IBFT_ISCSI_VERSION "0.4.9"
-#define IBFT_ISCSI_DATE "2008-Mar-14"
+#define IBFT_ISCSI_VERSION "0.5.0"
+#define IBFT_ISCSI_DATE "2010-Feb-25"
MODULE_AUTHOR("Peter Jones <pjones at redhat.com> and \
Konrad Rzeszutek <ketuzsezr at darnok.org>");
@@ -238,7 +242,7 @@ static const char *ibft_initiator_properties[] =
*/
struct ibft_kobject {
- struct ibft_table_header *header;
+ struct acpi_table_ibft *header;
union {
struct ibft_initiator *initiator;
struct ibft_nic *nic;
@@ -536,12 +540,13 @@ static int __init ibft_check_device(void)
u8 *pos;
u8 csum = 0;
- len = ibft_addr->length;
+ len = ibft_addr->header.length;
/* Sanity checking of iBFT. */
- if (ibft_addr->revision != 1) {
+ if (ibft_addr->header.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;
}
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.
*/
-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 list_head *list)
{
@@ -596,7 +601,7 @@ static int __init ibft_create_kobject(struct ibft_table_header *header,
default:
printk(KERN_ERR "iBFT has unknown structure type (%d). " \
"Report this bug to %.6s!\n", hdr->id,
- header->oem_id);
+ header->header.oem_id);
rc = 1;
break;
}
@@ -649,7 +654,7 @@ out_invalid_struct:
* found add them on the passed-in list. We do not support the other
* 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 ibft_control *control = NULL;
@@ -660,7 +665,7 @@ static int __init ibft_register_kobjects(struct ibft_table_header *header,
control = (void *)header + sizeof(*header);
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,
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)) {
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,
(void *)header + offset,
list);
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
index d6470ef..8f4d157 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 at redhat.com>
* Copyright 2007 IBM, Inc.
* by Konrad Rzeszutek <konradr at 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 +31,14 @@
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/types.h>
+#include <linux/acpi.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 +48,13 @@ 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 +68,11 @@ 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 +86,24 @@ 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;
diff --git a/include/linux/iscsi_ibft.h b/include/linux/iscsi_ibft.h
index d2e4042..8ba7e5b 100644
--- a/include/linux/iscsi_ibft.h
+++ b/include/linux/iscsi_ibft.h
@@ -21,21 +21,13 @@
#ifndef ISCSI_IBFT_H
#define ISCSI_IBFT_H
-struct ibft_table_header {
- char signature[4];
- u32 length;
- u8 revision;
- u8 checksum;
- char oem_id[6];
- char oem_table_id[8];
- char reserved[24];
-} __attribute__((__packed__));
+#include <acpi/acpi.h>
/*
* Logical location of iSCSI Boot Format Table.
* 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
--
1.7.0.4
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