| Robert Love | f032c2f | 2008-12-09 15:10:11 -0800 | [diff] [blame] | 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 | /* |
| Robert Love | f032c2f | 2008-12-09 15:10:11 -0800 | [diff] [blame] | 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_ */ |