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 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 | |