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 * FC_FCOE_OUI hasn't been standardized yet. XXX TBD. 29 */ 30 #ifndef FC_FCOE_OUI 31 #define FC_FCOE_OUI 0x0efc00 /* upper 24 bits of FCOE dest MAC TBD */ 32 #endif 33 34 /* 35 * The destination MAC address for the fabric login may get a different OUI. 36 * This isn't standardized yet. 37 */ 38 #ifndef FC_FCOE_FLOGI_MAC 39 /* gateway MAC - TBD */ 40 #define FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe } 41 #endif 42 43 #define FC_FCOE_VER 0 /* version */ 44 45 /* 46 * Ethernet Addresses based on FC S_ID and D_ID. 47 * Generated by FC_FCOE_OUI | S_ID/D_ID 48 */ 49 #define FC_FCOE_ENCAPS_ID(n) (((u64) FC_FCOE_OUI << 24) | (n)) 50 #define FC_FCOE_DECAPS_ID(n) ((n) >> 24) 51 52 /* 53 * FCoE frame header - 14 bytes 54 * 55 * This is the August 2007 version of the FCoE header as defined by T11. 56 * This follows the VLAN header, which includes the ethertype. 57 */ 58 struct fcoe_hdr { 59 __u8 fcoe_ver; /* version field - upper 4 bits */ 60 __u8 fcoe_resvd[12]; /* reserved - send zero and ignore */ 61 __u8 fcoe_sof; /* start of frame per RFC 3643 */ 62 }; 63 64 #define FC_FCOE_DECAPS_VER(hp) ((hp)->fcoe_ver >> 4) 65 #define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4) 66 67 /* 68 * FCoE CRC & EOF - 8 bytes. 69 */ 70 struct fcoe_crc_eof { 71 __le32 fcoe_crc32; /* CRC for FC packet */ 72 __u8 fcoe_eof; /* EOF from RFC 3643 */ 73 __u8 fcoe_resvd[3]; /* reserved - send zero and ignore */ 74 } __attribute__((packed)); 75 76 /* 77 * Minimum FCoE + FC header length 78 * 14 bytes FCoE header + 24 byte FC header = 38 bytes 79 */ 80 #define FCOE_HEADER_LEN 38 81 82 /* 83 * Minimum FCoE frame size 84 * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes 85 */ 86 #define FCOE_MIN_FRAME 46 87 88 /* 89 * fc_fcoe_set_mac - Store OUI + DID into MAC address field. 90 * @mac: mac address to be set 91 * @did: fc dest id to use 92 */ 93 static inline void fc_fcoe_set_mac(u8 *mac, u8 *did) 94 { 95 mac[0] = (u8) (FC_FCOE_OUI >> 16); 96 mac[1] = (u8) (FC_FCOE_OUI >> 8); 97 mac[2] = (u8) FC_FCOE_OUI; 98 mac[3] = did[0]; 99 mac[4] = did[1]; 100 mac[5] = did[2]; 101 } 102 103 #endif /* _FC_FCOE_H_ */ 104