xref: /linux-6.15/include/linux/iscsi_ibft.h (revision 042be38e)

/*
 *  Copyright 2007 Red Hat, Inc.
 *  by Peter Jones <[email protected]>
 *  Copyright 2007 IBM, Inc.
 *  by Konrad Rzeszutek <[email protected]>
 *  Copyright 2008
 *  by Konrad Rzeszutek <[email protected]>
 *
 * This code exposes the iSCSI Boot Format Table to userland via sysfs.
 *
 * 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.
 */

#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__));

/*
 * 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;

/*
 * Routine used to find and reserve the iSCSI Boot Format Table. The
 * mapped address is set in the ibft_addr variable.
 */
#ifdef CONFIG_ISCSI_IBFT_FIND
unsigned long find_ibft_region(unsigned long *sizep);
#else
static inline unsigned long find_ibft_region(unsigned long *sizep)
{
	*sizep = 0;
	return 0;
}
#endif

#endif /* ISCSI_IBFT_H */