1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright(c) 2007 Intel Corporation. All rights reserved. 4 * 5 * Maintained at www.Open-FCoE.org 6 */ 7 8 #ifndef _FC_FCOE_H_ 9 #define _FC_FCOE_H_ 10 11 /* 12 * FCoE - Fibre Channel over Ethernet. 13 * See T11 FC-BB-5 Rev 2.00 (09-056v5.pdf) 14 */ 15 16 /* 17 * Default FC_FCOE_OUI / FC-MAP value. 18 */ 19 #define FC_FCOE_OUI 0x0efc00 /* upper 24 bits of FCOE MAC */ 20 21 /* 22 * Fabric Login (FLOGI) MAC for non-FIP use. Non-FIP use is deprecated. 23 */ 24 #define FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe } 25 26 #define FC_FCOE_VER 0 /* version */ 27 28 /* 29 * Ethernet Addresses based on FC S_ID and D_ID. 30 * Generated by FC_FCOE_OUI | S_ID/D_ID 31 */ 32 #define FC_FCOE_ENCAPS_ID(n) (((u64) FC_FCOE_OUI << 24) | (n)) 33 #define FC_FCOE_DECAPS_ID(n) ((n) >> 24) 34 35 /* 36 * FCoE frame header - 14 bytes 37 * This follows the VLAN header, which includes the ethertype. 38 */ 39 struct fcoe_hdr { 40 __u8 fcoe_ver; /* version field - upper 4 bits */ 41 __u8 fcoe_resvd[12]; /* reserved - send zero and ignore */ 42 __u8 fcoe_sof; /* start of frame per RFC 3643 */ 43 }; 44 45 #define FC_FCOE_DECAPS_VER(hp) ((hp)->fcoe_ver >> 4) 46 #define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4) 47 48 /* 49 * FCoE CRC & EOF - 8 bytes. 50 */ 51 struct fcoe_crc_eof { 52 __le32 fcoe_crc32; /* CRC for FC packet */ 53 __u8 fcoe_eof; /* EOF from RFC 3643 */ 54 __u8 fcoe_resvd[3]; /* reserved - send zero and ignore */ 55 } __attribute__((packed)); 56 57 /* 58 * Minimum FCoE + FC header length 59 * 14 bytes FCoE header + 24 byte FC header = 38 bytes 60 */ 61 #define FCOE_HEADER_LEN 38 62 63 /* 64 * Minimum FCoE frame size 65 * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes 66 */ 67 #define FCOE_MIN_FRAME 46 68 69 /* 70 * FCoE Link Error Status Block: T11 FC-BB-5 Rev2.0, Clause 7.10. 71 */ 72 struct fcoe_fc_els_lesb { 73 __be32 lesb_link_fail; /* link failure count */ 74 __be32 lesb_vlink_fail; /* virtual link failure count */ 75 __be32 lesb_miss_fka; /* missing FIP keep-alive count */ 76 __be32 lesb_symb_err; /* symbol error during carrier count */ 77 __be32 lesb_err_block; /* errored block count */ 78 __be32 lesb_fcs_error; /* frame check sequence error count */ 79 }; 80 81 /* 82 * fc_fcoe_set_mac - Store OUI + DID into MAC address field. 83 * @mac: mac address to be set 84 * @did: fc dest id to use 85 */ 86 static inline void fc_fcoe_set_mac(u8 *mac, u8 *did) 87 { 88 mac[0] = (u8) (FC_FCOE_OUI >> 16); 89 mac[1] = (u8) (FC_FCOE_OUI >> 8); 90 mac[2] = (u8) FC_FCOE_OUI; 91 mac[3] = did[0]; 92 mac[4] = did[1]; 93 mac[5] = did[2]; 94 } 95 96 #endif /* _FC_FCOE_H_ */ 97