iscsi_ibft.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  Copyright 2007 Red Hat, Inc.
 4 *  by Peter Jones <pjones@redhat.com>
 5 *  Copyright 2007 IBM, Inc.
 6 *  by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 7 *  Copyright 2008
 8 *  by Konrad Rzeszutek <ketuzsezr@darnok.org>
 9 *
10 * This code exposes the iSCSI Boot Format Table to userland via sysfs.
11 */
12
13#ifndef ISCSI_IBFT_H
14#define ISCSI_IBFT_H
15
16#include <linux/types.h>
17
18/*
19 * Physical location of iSCSI Boot Format Table.
20 * If the value is 0 there is no iBFT on the machine.
21 */
22extern phys_addr_t ibft_phys_addr;
23
24#ifdef CONFIG_ISCSI_IBFT_FIND
25
26/*
27 * Routine used to find and reserve the iSCSI Boot Format Table. The
28 * physical address is set in the ibft_phys_addr variable.
29 */
30void reserve_ibft_region(void);
31
32/*
33 * Physical bounds to search for the iSCSI Boot Format Table.
34 */
35#define IBFT_START 0x80000 /* 512kB */
36#define IBFT_END 0x100000 /* 1MB */
37
38#else
39static inline void reserve_ibft_region(void) {}
40#endif
41
42#endif /* ISCSI_IBFT_H */