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 * See T11 FC-BB-5 Rev 2.00 (09-056v5.pdf) 26 */ 27 28 /* 29 * Default FC_FCOE_OUI / FC-MAP value. 30 */ 31 #define FC_FCOE_OUI 0x0efc00 /* upper 24 bits of FCOE MAC */ 32 33 /* 34 * Fabric Login (FLOGI) MAC for non-FIP use. Non-FIP use is deprecated. 35 */ 36 #define FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe } 37 38 #define FC_FCOE_VER 0 /* version */ 39 40 /* 41 * Ethernet Addresses based on FC S_ID and D_ID. 42 * Generated by FC_FCOE_OUI | S_ID/D_ID 43 */ 44 #define FC_FCOE_ENCAPS_ID(n) (((u64) FC_FCOE_OUI << 24) | (n)) 45 #define FC_FCOE_DECAPS_ID(n) ((n) >> 24) 46 47 /* 48 * FCoE frame header - 14 bytes 49 * This follows the VLAN header, which includes the ethertype. 50 */ 51 struct fcoe_hdr { 52 __u8 fcoe_ver; /* version field - upper 4 bits */ 53 __u8 fcoe_resvd[12]; /* reserved - send zero and ignore */ 54 __u8 fcoe_sof; /* start of frame per RFC 3643 */ 55 }; 56 57 #define FC_FCOE_DECAPS_VER(hp) ((hp)->fcoe_ver >> 4) 58 #define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4) 59 60 /* 61 * FCoE CRC & EOF - 8 bytes. 62 */ 63 struct fcoe_crc_eof { 64 __le32 fcoe_crc32; /* CRC for FC packet */ 65 __u8 fcoe_eof; /* EOF from RFC 3643 */ 66 __u8 fcoe_resvd[3]; /* reserved - send zero and ignore */ 67 } __attribute__((packed)); 68 69 /* 70 * Minimum FCoE + FC header length 71 * 14 bytes FCoE header + 24 byte FC header = 38 bytes 72 */ 73 #define FCOE_HEADER_LEN 38 74 75 /* 76 * Minimum FCoE frame size 77 * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes 78 */ 79 #define FCOE_MIN_FRAME 46 80 81 /* 82 * FCoE Link Error Status Block: T11 FC-BB-5 Rev2.0, Clause 7.10. 83 */ 84 struct fcoe_fc_els_lesb { 85 __be32 lesb_link_fail; /* link failure count */ 86 __be32 lesb_vlink_fail; /* virtual link failure count */ 87 __be32 lesb_miss_fka; /* missing FIP keep-alive count */ 88 __be32 lesb_symb_err; /* symbol error during carrier count */ 89 __be32 lesb_err_block; /* errored block count */ 90 __be32 lesb_fcs_error; /* frame check sequence error count */ 91 }; 92 93 /* 94 * fc_fcoe_set_mac - Store OUI + DID into MAC address field. 95 * @mac: mac address to be set 96 * @did: fc dest id to use 97 */ 98 static inline void fc_fcoe_set_mac(u8 *mac, u8 *did) 99 { 100 mac[0] = (u8) (FC_FCOE_OUI >> 16); 101 mac[1] = (u8) (FC_FCOE_OUI >> 8); 102 mac[2] = (u8) FC_FCOE_OUI; 103 mac[3] = did[0]; 104 mac[4] = did[1]; 105 mac[5] = did[2]; 106 } 107 108 #endif /* _FC_FCOE_H_ */ 109