1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright(c) 2007 Intel Corporation. All rights reserved.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Maintained at www.Open-FCoE.org
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef _FC_FCOE_H_
9*4882a593Smuzhiyun #define _FC_FCOE_H_
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun /*
12*4882a593Smuzhiyun * FCoE - Fibre Channel over Ethernet.
13*4882a593Smuzhiyun * See T11 FC-BB-5 Rev 2.00 (09-056v5.pdf)
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun /*
17*4882a593Smuzhiyun * Default FC_FCOE_OUI / FC-MAP value.
18*4882a593Smuzhiyun */
19*4882a593Smuzhiyun #define FC_FCOE_OUI 0x0efc00 /* upper 24 bits of FCOE MAC */
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /*
22*4882a593Smuzhiyun * Fabric Login (FLOGI) MAC for non-FIP use. Non-FIP use is deprecated.
23*4882a593Smuzhiyun */
24*4882a593Smuzhiyun #define FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe }
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #define FC_FCOE_VER 0 /* version */
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun /*
29*4882a593Smuzhiyun * Ethernet Addresses based on FC S_ID and D_ID.
30*4882a593Smuzhiyun * Generated by FC_FCOE_OUI | S_ID/D_ID
31*4882a593Smuzhiyun */
32*4882a593Smuzhiyun #define FC_FCOE_ENCAPS_ID(n) (((u64) FC_FCOE_OUI << 24) | (n))
33*4882a593Smuzhiyun #define FC_FCOE_DECAPS_ID(n) ((n) >> 24)
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun /*
36*4882a593Smuzhiyun * FCoE frame header - 14 bytes
37*4882a593Smuzhiyun * This follows the VLAN header, which includes the ethertype.
38*4882a593Smuzhiyun */
39*4882a593Smuzhiyun struct fcoe_hdr {
40*4882a593Smuzhiyun __u8 fcoe_ver; /* version field - upper 4 bits */
41*4882a593Smuzhiyun __u8 fcoe_resvd[12]; /* reserved - send zero and ignore */
42*4882a593Smuzhiyun __u8 fcoe_sof; /* start of frame per RFC 3643 */
43*4882a593Smuzhiyun };
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun #define FC_FCOE_DECAPS_VER(hp) ((hp)->fcoe_ver >> 4)
46*4882a593Smuzhiyun #define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4)
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun /*
49*4882a593Smuzhiyun * FCoE CRC & EOF - 8 bytes.
50*4882a593Smuzhiyun */
51*4882a593Smuzhiyun struct fcoe_crc_eof {
52*4882a593Smuzhiyun __le32 fcoe_crc32; /* CRC for FC packet */
53*4882a593Smuzhiyun __u8 fcoe_eof; /* EOF from RFC 3643 */
54*4882a593Smuzhiyun __u8 fcoe_resvd[3]; /* reserved - send zero and ignore */
55*4882a593Smuzhiyun } __attribute__((packed));
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun /*
58*4882a593Smuzhiyun * Minimum FCoE + FC header length
59*4882a593Smuzhiyun * 14 bytes FCoE header + 24 byte FC header = 38 bytes
60*4882a593Smuzhiyun */
61*4882a593Smuzhiyun #define FCOE_HEADER_LEN 38
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun /*
64*4882a593Smuzhiyun * Minimum FCoE frame size
65*4882a593Smuzhiyun * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes
66*4882a593Smuzhiyun */
67*4882a593Smuzhiyun #define FCOE_MIN_FRAME 46
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun /*
70*4882a593Smuzhiyun * FCoE Link Error Status Block: T11 FC-BB-5 Rev2.0, Clause 7.10.
71*4882a593Smuzhiyun */
72*4882a593Smuzhiyun struct fcoe_fc_els_lesb {
73*4882a593Smuzhiyun __be32 lesb_link_fail; /* link failure count */
74*4882a593Smuzhiyun __be32 lesb_vlink_fail; /* virtual link failure count */
75*4882a593Smuzhiyun __be32 lesb_miss_fka; /* missing FIP keep-alive count */
76*4882a593Smuzhiyun __be32 lesb_symb_err; /* symbol error during carrier count */
77*4882a593Smuzhiyun __be32 lesb_err_block; /* errored block count */
78*4882a593Smuzhiyun __be32 lesb_fcs_error; /* frame check sequence error count */
79*4882a593Smuzhiyun };
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun /*
82*4882a593Smuzhiyun * fc_fcoe_set_mac - Store OUI + DID into MAC address field.
83*4882a593Smuzhiyun * @mac: mac address to be set
84*4882a593Smuzhiyun * @did: fc dest id to use
85*4882a593Smuzhiyun */
fc_fcoe_set_mac(u8 * mac,u8 * did)86*4882a593Smuzhiyun static inline void fc_fcoe_set_mac(u8 *mac, u8 *did)
87*4882a593Smuzhiyun {
88*4882a593Smuzhiyun mac[0] = (u8) (FC_FCOE_OUI >> 16);
89*4882a593Smuzhiyun mac[1] = (u8) (FC_FCOE_OUI >> 8);
90*4882a593Smuzhiyun mac[2] = (u8) FC_FCOE_OUI;
91*4882a593Smuzhiyun mac[3] = did[0];
92*4882a593Smuzhiyun mac[4] = did[1];
93*4882a593Smuzhiyun mac[5] = did[2];
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun #endif /* _FC_FCOE_H_ */
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