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 /* 35 * FC_FCOE_OUI hasn't been standardized yet. XXX TBD. 36 */ 37 #ifndef FC_FCOE_OUI 38 #define FC_FCOE_OUI 0x0efc00 /* upper 24 bits of FCOE dest MAC TBD */ 39 #endif 40 41 /* 42 * The destination MAC address for the fabric login may get a different OUI. 43 * This isn't standardized yet. 44 */ 45 #ifndef FC_FCOE_FLOGI_MAC 46 /* gateway MAC - TBD */ 47 #define FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe } 48 #endif 49 50 #define FC_FCOE_VER 0 /* version */ 51 52 /* 53 * Ethernet Addresses based on FC S_ID and D_ID. 54 * Generated by FC_FCOE_OUI | S_ID/D_ID 55 */ 56 #define FC_FCOE_ENCAPS_ID(n) (((u64) FC_FCOE_OUI << 24) | (n)) 57 #define FC_FCOE_DECAPS_ID(n) ((n) >> 24) 58 59 /* 60 * FCoE frame header - 14 bytes 61 * 62 * This is the August 2007 version of the FCoE header as defined by T11. 63 * This follows the VLAN header, which includes the ethertype. 64 */ 65 struct fcoe_hdr { 66 __u8 fcoe_ver; /* version field - upper 4 bits */ 67 __u8 fcoe_resvd[12]; /* reserved - send zero and ignore */ 68 __u8 fcoe_sof; /* start of frame per RFC 3643 */ 69 }; 70 71 #define FC_FCOE_DECAPS_VER(hp) ((hp)->fcoe_ver >> 4) 72 #define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4) 73 74 /* 75 * FCoE CRC & EOF - 8 bytes. 76 */ 77 struct fcoe_crc_eof { 78 __le32 fcoe_crc32; /* CRC for FC packet */ 79 __u8 fcoe_eof; /* EOF from RFC 3643 */ 80 __u8 fcoe_resvd[3]; /* reserved - send zero and ignore */ 81 } __attribute__((packed)); 82 83 /* 84 * Minimum FCoE + FC header length 85 * 14 bytes FCoE header + 24 byte FC header = 38 bytes 86 */ 87 #define FCOE_HEADER_LEN 38 88 89 /* 90 * Minimum FCoE frame size 91 * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes 92 */ 93 #define FCOE_MIN_FRAME 46 94 95 /* 96 * fc_fcoe_set_mac - Store OUI + DID into MAC address field. 97 * @mac: mac address to be set 98 * @did: fc dest id to use 99 */ 100 static inline void fc_fcoe_set_mac(u8 *mac, u8 *did) 101 { 102 mac[0] = (u8) (FC_FCOE_OUI >> 16); 103 mac[1] = (u8) (FC_FCOE_OUI >> 8); 104 mac[2] = (u8) FC_FCOE_OUI; 105 mac[3] = did[0]; 106 mac[4] = did[1]; 107 mac[5] = did[2]; 108 } 109 110 #endif /* _FC_FCOE_H_ */ 111