include/linux/iscsi_ibft.h

   1 /*
   2  *  Copyright 2007 Red Hat, Inc.
   3  *  by Peter Jones <pjones@redhat.com>
   4  *  Copyright 2007 IBM, Inc.
   5  *  by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
   6  *  Copyright 2008
   7  *  by Konrad Rzeszutek <ketuzsezr@darnok.org>
   8  *
   9  * This code exposes the iSCSI Boot Format Table to userland via sysfs.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License v2.0 as published by
  13  * the Free Software Foundation
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  */
  20
  21 #ifndef ISCSI_IBFT_H
  22 #define ISCSI_IBFT_H
  23
  24 struct ibft_table_header {
  25         char signature[4];
  26         u32 length;
  27         u8 revision;
  28         u8 checksum;
  29         char oem_id[6];
  30         char oem_table_id[8];
  31         char reserved[24];
  32 } __attribute__((__packed__));
  33
  34 /*
  35  * Logical location of iSCSI Boot Format Table.
  36  * If the value is NULL there is no iBFT on the machine.
  37  */
  38 extern struct ibft_table_header *ibft_addr;
  39
  40 /*
  41  * Routine used to find and reserve the iSCSI Boot Format Table. The
  42  * mapped address is set in the ibft_addr variable.
  43  */
  44 #ifdef CONFIG_ISCSI_IBFT_FIND
  45 unsigned long find_ibft_region(unsigned long *sizep);
  46 #else
  47 static inline unsigned long find_ibft_region(unsigned long *sizep)
  48 {
  49         *sizep = 0;
  50         return 0;
  51 }
  52 #endif
  53
  54 #endif /* ISCSI_IBFT_H */