1 /* 2 * Copyright(c) 2007 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 16 * 17 * Maintained at www.Open-FCoE.org 18 */ 19 20 #ifndef _FC_FCOE_H_ 21 #define _FC_FCOE_H_ 22 23 /* 24 * FCoE - Fibre Channel over Ethernet. 25 */ 26 27 /* 28 * The FCoE ethertype eventually goes in net/if_ether.h. 29 */ 30 #ifndef ETH_P_FCOE 31 #define ETH_P_FCOE 0x8906 /* FCOE ether type */ 32 #endif 33 34 #ifndef ETH_P_8021Q 35 #define ETH_P_8021Q 0x8100 36 #endif 37 38 /* 39 * FC_FCOE_OUI hasn't been standardized yet. XXX TBD. 40 */ 41 #ifndef FC_FCOE_OUI 42 #define FC_FCOE_OUI 0x0efc00 /* upper 24 bits of FCOE dest MAC TBD */ 43 #endif 44 45 /* 46 * The destination MAC address for the fabric login may get a different OUI. 47 * This isn't standardized yet. 48 */ 49 #ifndef FC_FCOE_FLOGI_MAC 50 /* gateway MAC - TBD */ 51 #define FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe } 52 #endif 53 54 #define FC_FCOE_VER 0 /* version */ 55 56 /* 57 * Ethernet Addresses based on FC S_ID and D_ID. 58 * Generated by FC_FCOE_OUI | S_ID/D_ID 59 */ 60 #define FC_FCOE_ENCAPS_ID(n) (((u64) FC_FCOE_OUI << 24) | (n)) 61 #define FC_FCOE_DECAPS_ID(n) ((n) >> 24) 62 63 /* 64 * FCoE frame header - 14 bytes 65 * 66 * This is the August 2007 version of the FCoE header as defined by T11. 67 * This follows the VLAN header, which includes the ethertype. 68 */ 69 struct fcoe_hdr { 70 __u8 fcoe_ver; /* version field - upper 4 bits */ 71 __u8 fcoe_resvd[12]; /* reserved - send zero and ignore */ 72 __u8 fcoe_sof; /* start of frame per RFC 3643 */ 73 }; 74 75 #define FC_FCOE_DECAPS_VER(hp) ((hp)->fcoe_ver >> 4) 76 #define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4) 77 78 /* 79 * FCoE CRC & EOF - 8 bytes. 80 */ 81 struct fcoe_crc_eof { 82 __le32 fcoe_crc32; /* CRC for FC packet */ 83 __u8 fcoe_eof; /* EOF from RFC 3643 */ 84 __u8 fcoe_resvd[3]; /* reserved - send zero and ignore */ 85 } __attribute__((packed)); 86 87 /* 88 * Minimum FCoE + FC header length 89 * 14 bytes FCoE header + 24 byte FC header = 38 bytes 90 */ 91 #define FCOE_HEADER_LEN 38 92 93 /* 94 * Minimum FCoE frame size 95 * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes 96 */ 97 #define FCOE_MIN_FRAME 46 98 99 /* 100 * fc_fcoe_set_mac - Store OUI + DID into MAC address field. 101 * @mac: mac address to be set 102 * @did: fc dest id to use 103 */ 104 static inline void fc_fcoe_set_mac(u8 *mac, u8 *did) 105 { 106 mac[0] = (u8) (FC_FCOE_OUI >> 16); 107 mac[1] = (u8) (FC_FCOE_OUI >> 8); 108 mac[2] = (u8) FC_FCOE_OUI; 109 mac[3] = did[0]; 110 mac[4] = did[1]; 111 mac[5] = did[2]; 112 } 113 114 #endif /* _FC_FCOE_H_ */ 115