Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5abd9ccc authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft-2.6 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft-2.6:
  ibft: Use IBFT_SIGN instead of open-coding the search string.
  ibft: convert iscsi_ibft module to iscsi boot lib
  ibft: separate ibft parsing from sysfs interface
  ibft: For UEFI machines actually do scan ACPI for iBFT.
  ibft: Update iBFT handling for v1.03 of the spec.
parents d5fc1d51 57a5f3c9

drivers/firmware/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -122,8 +122,17 @@ config ISCSI_IBFT_FIND 
	  is necessary for iSCSI Boot Firmware Table Attributes module to work

	  properly.



config ISCSI_BOOT_SYSFS

	tristate "iSCSI Boot Sysfs Interface"

	default	n

	help

	  This option enables support for exposing iSCSI boot information

	  via sysfs to userspace. If you wish to export this information,

	  say Y. Otherwise, say N.



config ISCSI_IBFT

	tristate "iSCSI Boot Firmware Table Attributes module"

	select ISCSI_BOOT_SYSFS

	depends on ISCSI_IBFT_FIND

	default	n

	help

drivers/firmware/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -10,4 +10,5 @@ obj-$(CONFIG_DCDBAS) += dcdbas.o 
obj-$(CONFIG_DMIID)		+= dmi-id.o

obj-$(CONFIG_ISCSI_IBFT_FIND)	+= iscsi_ibft_find.o

obj-$(CONFIG_ISCSI_IBFT)	+= iscsi_ibft.o

obj-$(CONFIG_ISCSI_BOOT_SYSFS)	+= iscsi_boot_sysfs.o

obj-$(CONFIG_FIRMWARE_MEMMAP)	+= memmap.o

drivers/firmware/iscsi_boot_sysfs.c

0 → 100644
+481 −0
Original line number Diff line number Diff line 
/*

 * Export the iSCSI boot info to userland via sysfs.

 *

 * Copyright (C) 2010 Red Hat, Inc.  All rights reserved.

 * Copyright (C) 2010 Mike Christie

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License v2.0 as published by

 * the Free Software Foundation

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#include <linux/module.h>

#include <linux/string.h>

#include <linux/slab.h>

#include <linux/sysfs.h>

#include <linux/capability.h>

#include <linux/iscsi_boot_sysfs.h>





MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>");

MODULE_DESCRIPTION("sysfs interface and helpers to export iSCSI boot information");

MODULE_LICENSE("GPL");

/*

 * The kobject and attribute structures.

 */

struct iscsi_boot_attr {

	struct attribute attr;

	int type;

	ssize_t (*show) (void *data, int type, char *buf);

};



/*

 * The routine called for all sysfs attributes.

 */

static ssize_t iscsi_boot_show_attribute(struct kobject *kobj,

					 struct attribute *attr, char *buf)

{

	struct iscsi_boot_kobj *boot_kobj =

			container_of(kobj, struct iscsi_boot_kobj, kobj);

	struct iscsi_boot_attr *boot_attr =

			container_of(attr, struct iscsi_boot_attr, attr);

	ssize_t ret = -EIO;

	char *str = buf;



	if (!capable(CAP_SYS_ADMIN))

		return -EACCES;



	if (boot_kobj->show)

		ret = boot_kobj->show(boot_kobj->data, boot_attr->type, str);

	return ret;

}



static const struct sysfs_ops iscsi_boot_attr_ops = {

	.show = iscsi_boot_show_attribute,

};



static void iscsi_boot_kobj_release(struct kobject *kobj)

{

	struct iscsi_boot_kobj *boot_kobj =

			container_of(kobj, struct iscsi_boot_kobj, kobj);



	kfree(boot_kobj->data);

	kfree(boot_kobj);

}



static struct kobj_type iscsi_boot_ktype = {

	.release = iscsi_boot_kobj_release,

	.sysfs_ops = &iscsi_boot_attr_ops,

};



#define iscsi_boot_rd_attr(fnname, sysfs_name, attr_type)		\

static struct iscsi_boot_attr iscsi_boot_attr_##fnname = {	\

	.attr	= { .name = __stringify(sysfs_name), .mode = 0444 },	\

	.type	= attr_type,						\

}



/* Target attrs */

iscsi_boot_rd_attr(tgt_index, index, ISCSI_BOOT_TGT_INDEX);

iscsi_boot_rd_attr(tgt_flags, flags, ISCSI_BOOT_TGT_FLAGS);

iscsi_boot_rd_attr(tgt_ip, ip-addr, ISCSI_BOOT_TGT_IP_ADDR);

iscsi_boot_rd_attr(tgt_port, port, ISCSI_BOOT_TGT_PORT);

iscsi_boot_rd_attr(tgt_lun, lun, ISCSI_BOOT_TGT_LUN);

iscsi_boot_rd_attr(tgt_chap, chap-type, ISCSI_BOOT_TGT_CHAP_TYPE);

iscsi_boot_rd_attr(tgt_nic, nic-assoc, ISCSI_BOOT_TGT_NIC_ASSOC);

iscsi_boot_rd_attr(tgt_name, target-name, ISCSI_BOOT_TGT_NAME);

iscsi_boot_rd_attr(tgt_chap_name, chap-name, ISCSI_BOOT_TGT_CHAP_NAME);

iscsi_boot_rd_attr(tgt_chap_secret, chap-secret, ISCSI_BOOT_TGT_CHAP_SECRET);

iscsi_boot_rd_attr(tgt_chap_rev_name, rev-chap-name,

		   ISCSI_BOOT_TGT_REV_CHAP_NAME);

iscsi_boot_rd_attr(tgt_chap_rev_secret, rev-chap-name-secret,

		   ISCSI_BOOT_TGT_REV_CHAP_SECRET);



static struct attribute *target_attrs[] = {

	&iscsi_boot_attr_tgt_index.attr,

	&iscsi_boot_attr_tgt_flags.attr,

	&iscsi_boot_attr_tgt_ip.attr,

	&iscsi_boot_attr_tgt_port.attr,

	&iscsi_boot_attr_tgt_lun.attr,

	&iscsi_boot_attr_tgt_chap.attr,

	&iscsi_boot_attr_tgt_nic.attr,

	&iscsi_boot_attr_tgt_name.attr,

	&iscsi_boot_attr_tgt_chap_name.attr,

	&iscsi_boot_attr_tgt_chap_secret.attr,

	&iscsi_boot_attr_tgt_chap_rev_name.attr,

	&iscsi_boot_attr_tgt_chap_rev_secret.attr,

	NULL

};



static mode_t iscsi_boot_tgt_attr_is_visible(struct kobject *kobj,

					     struct attribute *attr, int i)

{

	struct iscsi_boot_kobj *boot_kobj =

			container_of(kobj, struct iscsi_boot_kobj, kobj);



	if (attr ==  &iscsi_boot_attr_tgt_index.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_TGT_INDEX);

	else if (attr == &iscsi_boot_attr_tgt_flags.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_TGT_FLAGS);

	else if (attr == &iscsi_boot_attr_tgt_ip.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					      ISCSI_BOOT_TGT_IP_ADDR);

	else if (attr == &iscsi_boot_attr_tgt_port.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					      ISCSI_BOOT_TGT_PORT);

	else if (attr == &iscsi_boot_attr_tgt_lun.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					      ISCSI_BOOT_TGT_LUN);

	else if (attr == &iscsi_boot_attr_tgt_chap.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_TGT_CHAP_TYPE);

	else if (attr == &iscsi_boot_attr_tgt_nic.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_TGT_NIC_ASSOC);

	else if (attr == &iscsi_boot_attr_tgt_name.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_TGT_NAME);

	else if (attr == &iscsi_boot_attr_tgt_chap_name.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_TGT_CHAP_NAME);

	else if (attr == &iscsi_boot_attr_tgt_chap_secret.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_TGT_CHAP_SECRET);

	else if (attr == &iscsi_boot_attr_tgt_chap_rev_name.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_TGT_REV_CHAP_NAME);

	else if (attr == &iscsi_boot_attr_tgt_chap_rev_secret.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_TGT_REV_CHAP_SECRET);

	return 0;

}



static struct attribute_group iscsi_boot_target_attr_group = {

	.attrs = target_attrs,

	.is_visible = iscsi_boot_tgt_attr_is_visible,

};



/* Ethernet attrs */

iscsi_boot_rd_attr(eth_index, index, ISCSI_BOOT_ETH_INDEX);

iscsi_boot_rd_attr(eth_flags, flags, ISCSI_BOOT_ETH_FLAGS);

iscsi_boot_rd_attr(eth_ip, ip-addr, ISCSI_BOOT_ETH_IP_ADDR);

iscsi_boot_rd_attr(eth_subnet, subnet-mask, ISCSI_BOOT_ETH_SUBNET_MASK);

iscsi_boot_rd_attr(eth_origin, origin, ISCSI_BOOT_ETH_ORIGIN);

iscsi_boot_rd_attr(eth_gateway, gateway, ISCSI_BOOT_ETH_GATEWAY);

iscsi_boot_rd_attr(eth_primary_dns, primary-dns, ISCSI_BOOT_ETH_PRIMARY_DNS);

iscsi_boot_rd_attr(eth_secondary_dns, secondary-dns,

		   ISCSI_BOOT_ETH_SECONDARY_DNS);

iscsi_boot_rd_attr(eth_dhcp, dhcp, ISCSI_BOOT_ETH_DHCP);

iscsi_boot_rd_attr(eth_vlan, vlan, ISCSI_BOOT_ETH_VLAN);

iscsi_boot_rd_attr(eth_mac, mac, ISCSI_BOOT_ETH_MAC);

iscsi_boot_rd_attr(eth_hostname, hostname, ISCSI_BOOT_ETH_HOSTNAME);



static struct attribute *ethernet_attrs[] = {

	&iscsi_boot_attr_eth_index.attr,

	&iscsi_boot_attr_eth_flags.attr,

	&iscsi_boot_attr_eth_ip.attr,

	&iscsi_boot_attr_eth_subnet.attr,

	&iscsi_boot_attr_eth_origin.attr,

	&iscsi_boot_attr_eth_gateway.attr,

	&iscsi_boot_attr_eth_primary_dns.attr,

	&iscsi_boot_attr_eth_secondary_dns.attr,

	&iscsi_boot_attr_eth_dhcp.attr,

	&iscsi_boot_attr_eth_vlan.attr,

	&iscsi_boot_attr_eth_mac.attr,

	&iscsi_boot_attr_eth_hostname.attr,

	NULL

};



static mode_t iscsi_boot_eth_attr_is_visible(struct kobject *kobj,

					     struct attribute *attr, int i)

{

	struct iscsi_boot_kobj *boot_kobj =

			container_of(kobj, struct iscsi_boot_kobj, kobj);



	if (attr ==  &iscsi_boot_attr_eth_index.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_INDEX);

	else if (attr ==  &iscsi_boot_attr_eth_flags.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_FLAGS);

	else if (attr ==  &iscsi_boot_attr_eth_ip.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_IP_ADDR);

	else if (attr ==  &iscsi_boot_attr_eth_subnet.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_SUBNET_MASK);

	else if (attr ==  &iscsi_boot_attr_eth_origin.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_ORIGIN);

	else if (attr ==  &iscsi_boot_attr_eth_gateway.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_GATEWAY);

	else if (attr ==  &iscsi_boot_attr_eth_primary_dns.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_PRIMARY_DNS);

	else if (attr ==  &iscsi_boot_attr_eth_secondary_dns.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_SECONDARY_DNS);

	else if (attr ==  &iscsi_boot_attr_eth_dhcp.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_DHCP);

	else if (attr ==  &iscsi_boot_attr_eth_vlan.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_VLAN);

	else if (attr ==  &iscsi_boot_attr_eth_mac.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_MAC);

	else if (attr ==  &iscsi_boot_attr_eth_hostname.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_ETH_HOSTNAME);

	return 0;

}



static struct attribute_group iscsi_boot_ethernet_attr_group = {

	.attrs = ethernet_attrs,

	.is_visible = iscsi_boot_eth_attr_is_visible,

};



/* Initiator attrs */

iscsi_boot_rd_attr(ini_index, index, ISCSI_BOOT_INI_INDEX);

iscsi_boot_rd_attr(ini_flags, flags, ISCSI_BOOT_INI_FLAGS);

iscsi_boot_rd_attr(ini_isns, isns-server, ISCSI_BOOT_INI_ISNS_SERVER);

iscsi_boot_rd_attr(ini_slp, slp-server, ISCSI_BOOT_INI_SLP_SERVER);

iscsi_boot_rd_attr(ini_primary_radius, pri-radius-server,

		   ISCSI_BOOT_INI_PRI_RADIUS_SERVER);

iscsi_boot_rd_attr(ini_secondary_radius, sec-radius-server,

		   ISCSI_BOOT_INI_SEC_RADIUS_SERVER);

iscsi_boot_rd_attr(ini_name, initiator-name, ISCSI_BOOT_INI_INITIATOR_NAME);



static struct attribute *initiator_attrs[] = {

	&iscsi_boot_attr_ini_index.attr,

	&iscsi_boot_attr_ini_flags.attr,

	&iscsi_boot_attr_ini_isns.attr,

	&iscsi_boot_attr_ini_slp.attr,

	&iscsi_boot_attr_ini_primary_radius.attr,

	&iscsi_boot_attr_ini_secondary_radius.attr,

	&iscsi_boot_attr_ini_name.attr,

	NULL

};



static mode_t iscsi_boot_ini_attr_is_visible(struct kobject *kobj,

					     struct attribute *attr, int i)

{

	struct iscsi_boot_kobj *boot_kobj =

			container_of(kobj, struct iscsi_boot_kobj, kobj);



	if (attr ==  &iscsi_boot_attr_ini_index.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_INI_INDEX);

	if (attr ==  &iscsi_boot_attr_ini_flags.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_INI_FLAGS);

	if (attr ==  &iscsi_boot_attr_ini_isns.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_INI_ISNS_SERVER);

	if (attr ==  &iscsi_boot_attr_ini_slp.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_INI_SLP_SERVER);

	if (attr ==  &iscsi_boot_attr_ini_primary_radius.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_INI_PRI_RADIUS_SERVER);

	if (attr ==  &iscsi_boot_attr_ini_secondary_radius.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_INI_SEC_RADIUS_SERVER);

	if (attr ==  &iscsi_boot_attr_ini_name.attr)

		return boot_kobj->is_visible(boot_kobj->data,

					     ISCSI_BOOT_INI_INITIATOR_NAME);



	return 0;

}



static struct attribute_group iscsi_boot_initiator_attr_group = {

	.attrs = initiator_attrs,

	.is_visible = iscsi_boot_ini_attr_is_visible,

};



static struct iscsi_boot_kobj *

iscsi_boot_create_kobj(struct iscsi_boot_kset *boot_kset,

		       struct attribute_group *attr_group,

		       const char *name, int index, void *data,

		       ssize_t (*show) (void *data, int type, char *buf),

		       mode_t (*is_visible) (void *data, int type))

{

	struct iscsi_boot_kobj *boot_kobj;



	boot_kobj = kzalloc(sizeof(*boot_kobj), GFP_KERNEL);

	if (!boot_kobj)

		return NULL;

	INIT_LIST_HEAD(&boot_kobj->list);



	boot_kobj->kobj.kset = boot_kset->kset;

	if (kobject_init_and_add(&boot_kobj->kobj, &iscsi_boot_ktype,

				 NULL, name, index)) {

		kfree(boot_kobj);

		return NULL;

	}

	boot_kobj->data = data;

	boot_kobj->show = show;

	boot_kobj->is_visible = is_visible;



	if (sysfs_create_group(&boot_kobj->kobj, attr_group)) {

		/*

		 * We do not want to free this because the caller

		 * will assume that since the creation call failed

		 * the boot kobj was not setup and the normal release

		 * path is not being run.

		 */

		boot_kobj->data = NULL;

		kobject_put(&boot_kobj->kobj);

		return NULL;

	}

	boot_kobj->attr_group = attr_group;



	kobject_uevent(&boot_kobj->kobj, KOBJ_ADD);

	/* Nothing broke so lets add it to the list. */

	list_add_tail(&boot_kobj->list, &boot_kset->kobj_list);

	return boot_kobj;

}



static void iscsi_boot_remove_kobj(struct iscsi_boot_kobj *boot_kobj)

{

	list_del(&boot_kobj->list);

	sysfs_remove_group(&boot_kobj->kobj, boot_kobj->attr_group);

	kobject_put(&boot_kobj->kobj);

}



/**

 * iscsi_boot_create_target() - create boot target sysfs dir

 * @boot_kset: boot kset

 * @index: the target id

 * @data: driver specific data for target

 * @show: attr show function

 * @is_visible: attr visibility function

 *

 * Note: The boot sysfs lib will free the data passed in for the caller

 * when all refs to the target kobject have been released.

 */

struct iscsi_boot_kobj *

iscsi_boot_create_target(struct iscsi_boot_kset *boot_kset, int index,

			 void *data,

			 ssize_t (*show) (void *data, int type, char *buf),

			 mode_t (*is_visible) (void *data, int type))

{

	return iscsi_boot_create_kobj(boot_kset, &iscsi_boot_target_attr_group,

				      "target%d", index, data, show, is_visible);

}

EXPORT_SYMBOL_GPL(iscsi_boot_create_target);



/**

 * iscsi_boot_create_initiator() - create boot initiator sysfs dir

 * @boot_kset: boot kset

 * @index: the initiator id

 * @data: driver specific data

 * @show: attr show function

 * @is_visible: attr visibility function

 *

 * Note: The boot sysfs lib will free the data passed in for the caller

 * when all refs to the initiator kobject have been released.

 */

struct iscsi_boot_kobj *

iscsi_boot_create_initiator(struct iscsi_boot_kset *boot_kset, int index,

			    void *data,

			    ssize_t (*show) (void *data, int type, char *buf),

			    mode_t (*is_visible) (void *data, int type))

{

	return iscsi_boot_create_kobj(boot_kset,

				      &iscsi_boot_initiator_attr_group,

				      "initiator", index, data, show,

				      is_visible);

}

EXPORT_SYMBOL_GPL(iscsi_boot_create_initiator);



/**

 * iscsi_boot_create_ethernet() - create boot ethernet sysfs dir

 * @boot_kset: boot kset

 * @index: the ethernet device id

 * @data: driver specific data

 * @show: attr show function

 * @is_visible: attr visibility function

 *

 * Note: The boot sysfs lib will free the data passed in for the caller

 * when all refs to the ethernet kobject have been released.

 */

struct iscsi_boot_kobj *

iscsi_boot_create_ethernet(struct iscsi_boot_kset *boot_kset, int index,

			   void *data,

			   ssize_t (*show) (void *data, int type, char *buf),

			   mode_t (*is_visible) (void *data, int type))

{

	return iscsi_boot_create_kobj(boot_kset,

				      &iscsi_boot_ethernet_attr_group,

				      "ethernet%d", index, data, show,

				      is_visible);

}

EXPORT_SYMBOL_GPL(iscsi_boot_create_ethernet);



/**

 * iscsi_boot_create_kset() - creates root sysfs tree

 * @set_name: name of root dir

 */

struct iscsi_boot_kset *iscsi_boot_create_kset(const char *set_name)

{

	struct iscsi_boot_kset *boot_kset;



	boot_kset = kzalloc(sizeof(*boot_kset), GFP_KERNEL);

	if (!boot_kset)

		return NULL;



	boot_kset->kset = kset_create_and_add(set_name, NULL, firmware_kobj);

	if (!boot_kset->kset) {

		kfree(boot_kset);

		return NULL;

	}



	INIT_LIST_HEAD(&boot_kset->kobj_list);

	return boot_kset;

}

EXPORT_SYMBOL_GPL(iscsi_boot_create_kset);



/**

 * iscsi_boot_create_host_kset() - creates root sysfs tree for a scsi host

 * @hostno: host number of scsi host

 */

struct iscsi_boot_kset *iscsi_boot_create_host_kset(unsigned int hostno)

{

	struct iscsi_boot_kset *boot_kset;

	char *set_name;



	set_name = kasprintf(GFP_KERNEL, "iscsi_boot%u", hostno);

	if (!set_name)

		return NULL;



	boot_kset = iscsi_boot_create_kset(set_name);

	kfree(set_name);

	return boot_kset;

}

EXPORT_SYMBOL_GPL(iscsi_boot_create_host_kset);



/**

 * iscsi_boot_destroy_kset() - destroy kset and kobjects under it

 * @boot_kset: boot kset

 *

 * This will remove the kset and kobjects and attrs under it.

 */

void iscsi_boot_destroy_kset(struct iscsi_boot_kset *boot_kset)

{

	struct iscsi_boot_kobj *boot_kobj, *tmp_kobj;



	list_for_each_entry_safe(boot_kobj, tmp_kobj,

				 &boot_kset->kobj_list, list)

		iscsi_boot_remove_kobj(boot_kobj);



	kset_unregister(boot_kset->kset);

}

EXPORT_SYMBOL_GPL(iscsi_boot_destroy_kset);

drivers/firmware/iscsi_ibft.c

+264 −462

File changed.

Preview size limit exceeded, changes collapsed.

drivers/firmware/iscsi_ibft_find.c

+44 −12
Original line number Diff line number Diff line 
/*

 *  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"
@@ -46,19 +49,20 @@ 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

 * 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;



	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 +76,42 @@ 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;

			}

		}

	}

	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

	 * for both.

	 */

	if (!ibft_addr)

		acpi_table_parse(ACPI_SIG_IBFT, acpi_find_ibft);

	if (!ibft_addr)

		acpi_table_parse(IBFT_SIGN, 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(len);

		return pos;

		*sizep = PAGE_ALIGN(ibft_addr->header.length);

		return (u64)isa_virt_to_bus(ibft_addr);

	}



	*sizep = 0;