/*
   * Copyright(c) 2007 Intel Corporation. All rights reserved.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms and conditions of the GNU General Public License,
   * version 2, as published by the Free Software Foundation.
   *
   * This program is distributed in the hope 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.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Maintained at www.Open-FCoE.org
   */
  
  #ifndef _FC_FCOE_H_
  #define	_FC_FCOE_H_
  
  /*
   * FCoE - Fibre Channel over Ethernet.

   * See T11 FC-BB-5 Rev 2.00 (09-056v5.pdf)

   */
  
  /*

   * Default FC_FCOE_OUI / FC-MAP value.

   */

  #define	FC_FCOE_OUI	0x0efc00	/* upper 24 bits of FCOE MAC */

  
  /*

   * Fabric Login (FLOGI) MAC for non-FIP use.  Non-FIP use is deprecated.

   */

  #define	FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe }

  
  #define	FC_FCOE_VER	0			/* version */
  
  /*
   * Ethernet Addresses based on FC S_ID and D_ID.
   * Generated by FC_FCOE_OUI | S_ID/D_ID
   */
  #define	FC_FCOE_ENCAPS_ID(n)	(((u64) FC_FCOE_OUI << 24) | (n))
  #define	FC_FCOE_DECAPS_ID(n)	((n) >> 24)
  
  /*
   * FCoE frame header - 14 bytes

   * This follows the VLAN header, which includes the ethertype.
   */
  struct fcoe_hdr {
  	__u8		fcoe_ver;	/* version field - upper 4 bits */
  	__u8		fcoe_resvd[12];	/* reserved - send zero and ignore */
  	__u8		fcoe_sof;	/* start of frame per RFC 3643 */
  };
  
  #define FC_FCOE_DECAPS_VER(hp)	    ((hp)->fcoe_ver >> 4)
  #define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4)
  
  /*
   * FCoE CRC & EOF - 8 bytes.
   */
  struct fcoe_crc_eof {
  	__le32		fcoe_crc32;	/* CRC for FC packet */
  	__u8		fcoe_eof;	/* EOF from RFC 3643 */
  	__u8		fcoe_resvd[3];	/* reserved - send zero and ignore */
  } __attribute__((packed));
  
  /*
   * Minimum FCoE + FC header length
   * 14 bytes FCoE header + 24 byte FC header = 38 bytes
   */
  #define FCOE_HEADER_LEN 38
  
  /*
   * Minimum FCoE frame size
   * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes
   */
  #define FCOE_MIN_FRAME 46
  
  /*

   * FCoE Link Error Status Block: T11 FC-BB-5 Rev2.0, Clause 7.10.
   */
  struct fcoe_fc_els_lesb {
  	__be32		lesb_link_fail;	/* link failure count */
  	__be32		lesb_vlink_fail; /* virtual link failure count */
  	__be32		lesb_miss_fka;	/* missing FIP keep-alive count */
  	__be32		lesb_symb_err;	/* symbol error during carrier count */
  	__be32		lesb_err_block;	/* errored block count */
  	__be32		lesb_fcs_error; /* frame check sequence error count */
  };
  
  /*

   * fc_fcoe_set_mac - Store OUI + DID into MAC address field.
   * @mac: mac address to be set
   * @did: fc dest id to use
   */
  static inline void fc_fcoe_set_mac(u8 *mac, u8 *did)
  {
  	mac[0] = (u8) (FC_FCOE_OUI >> 16);
  	mac[1] = (u8) (FC_FCOE_OUI >> 8);
  	mac[2] = (u8) FC_FCOE_OUI;
  	mac[3] = did[0];
  	mac[4] = did[1];
  	mac[5] = did[2];
  }
  
  #endif /* _FC_FCOE_H_ */