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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 |
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