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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
4 */
5#ifndef _FC_FIP_H_
6#define _FC_FIP_H_
7
8#include <scsi/fc/fc_ns.h>
9
10/*
11 * This version is based on:
12 * http://www.t11.org/ftp/t11/pub/fc/bb-5/08-543v1.pdf
13 * and T11 FC-BB-6 13-091v5.pdf (December 2013 VN2VN proposal)
14 */
15
16#define FIP_DEF_PRI 128 /* default selection priority */
17#define FIP_DEF_FC_MAP 0x0efc00 /* default FCoE MAP (MAC OUI) value */
18#define FIP_DEF_FKA 8000 /* default FCF keep-alive/advert period (mS) */
19#define FIP_VN_KA_PERIOD 90000 /* required VN_port keep-alive period (mS) */
20#define FIP_FCF_FUZZ 100 /* random time added by FCF (mS) */
21
22/*
23 * VN2VN proposed-standard values.
24 */
25#define FIP_VN_FC_MAP 0x0efd00 /* MAC OUI for VN2VN use */
26#define FIP_VN_PROBE_WAIT 100 /* interval between VN2VN probes (ms) */
27#define FIP_VN_ANN_WAIT 400 /* interval between VN2VN announcements (ms) */
28#define FIP_VN_RLIM_INT 10000 /* interval between probes when rate limited */
29#define FIP_VN_RLIM_COUNT 10 /* number of probes before rate limiting */
30#define FIP_VN_BEACON_INT 8000 /* interval between VN2VN beacons */
31#define FIP_VN_BEACON_FUZZ 100 /* random time to add to beacon period (ms) */
32
33/*
34 * Multicast MAC addresses. T11-adopted.
35 */
36#define FIP_ALL_FCOE_MACS ((__u8[6]) { 1, 0x10, 0x18, 1, 0, 0 })
37#define FIP_ALL_ENODE_MACS ((__u8[6]) { 1, 0x10, 0x18, 1, 0, 1 })
38#define FIP_ALL_FCF_MACS ((__u8[6]) { 1, 0x10, 0x18, 1, 0, 2 })
39#define FIP_ALL_VN2VN_MACS ((__u8[6]) { 1, 0x10, 0x18, 1, 0, 4 })
40#define FIP_ALL_P2P_MACS ((__u8[6]) { 1, 0x10, 0x18, 1, 0, 5 })
41
42#define FIP_VER 1 /* version for fip_header */
43
44struct fip_header {
45 __u8 fip_ver; /* upper 4 bits are the version */
46 __u8 fip_resv1; /* reserved */
47 __be16 fip_op; /* operation code */
48 __u8 fip_resv2; /* reserved */
49 __u8 fip_subcode; /* lower 4 bits are sub-code */
50 __be16 fip_dl_len; /* length of descriptors in words */
51 __be16 fip_flags; /* header flags */
52} __attribute__((packed));
53
54#define FIP_VER_SHIFT 4
55#define FIP_VER_ENCAPS(v) ((v) << FIP_VER_SHIFT)
56#define FIP_VER_DECAPS(v) ((v) >> FIP_VER_SHIFT)
57#define FIP_BPW 4 /* bytes per word for lengths */
58
59/*
60 * fip_op.
61 */
62enum fip_opcode {
63 FIP_OP_DISC = 1, /* discovery, advertisement, etc. */
64 FIP_OP_LS = 2, /* Link Service request or reply */
65 FIP_OP_CTRL = 3, /* Keep Alive / Link Reset */
66 FIP_OP_VLAN = 4, /* VLAN discovery */
67 FIP_OP_VN2VN = 5, /* VN2VN operation */
68 FIP_OP_VENDOR_MIN = 0xfff8, /* min vendor-specific opcode */
69 FIP_OP_VENDOR_MAX = 0xfffe, /* max vendor-specific opcode */
70};
71
72/*
73 * Subcodes for FIP_OP_DISC.
74 */
75enum fip_disc_subcode {
76 FIP_SC_SOL = 1, /* solicitation */
77 FIP_SC_ADV = 2, /* advertisement */
78};
79
80/*
81 * Subcodes for FIP_OP_LS.
82 */
83enum fip_trans_subcode {
84 FIP_SC_REQ = 1, /* request */
85 FIP_SC_REP = 2, /* reply */
86};
87
88/*
89 * Subcodes for FIP_OP_RESET.
90 */
91enum fip_reset_subcode {
92 FIP_SC_KEEP_ALIVE = 1, /* keep-alive from VN_Port */
93 FIP_SC_CLR_VLINK = 2, /* clear virtual link from VF_Port */
94};
95
96/*
97 * Subcodes for FIP_OP_VLAN.
98 */
99enum fip_vlan_subcode {
100 FIP_SC_VL_REQ = 1, /* vlan request */
101 FIP_SC_VL_NOTE = 2, /* vlan notification */
102 FIP_SC_VL_VN2VN_NOTE = 3, /* VN2VN vlan notification */
103};
104
105/*
106 * Subcodes for FIP_OP_VN2VN.
107 */
108enum fip_vn2vn_subcode {
109 FIP_SC_VN_PROBE_REQ = 1, /* probe request */
110 FIP_SC_VN_PROBE_REP = 2, /* probe reply */
111 FIP_SC_VN_CLAIM_NOTIFY = 3, /* claim notification */
112 FIP_SC_VN_CLAIM_REP = 4, /* claim response */
113 FIP_SC_VN_BEACON = 5, /* beacon */
114};
115
116/*
117 * flags in header fip_flags.
118 */
119enum fip_flag {
120 FIP_FL_FPMA = 0x8000, /* supports FPMA fabric-provided MACs */
121 FIP_FL_SPMA = 0x4000, /* supports SPMA server-provided MACs */
122 FIP_FL_FCF = 0x0020, /* originated from a controlling FCF */
123 FIP_FL_FDF = 0x0010, /* originated from an FDF */
124 FIP_FL_REC_OR_P2P = 0x0008, /* configured addr or point-to-point */
125 FIP_FL_AVAIL = 0x0004, /* available for FLOGI/ELP */
126 FIP_FL_SOL = 0x0002, /* this is a solicited message */
127 FIP_FL_FPORT = 0x0001, /* sent from an F port */
128};
129
130/*
131 * Common descriptor header format.
132 */
133struct fip_desc {
134 __u8 fip_dtype; /* type - see below */
135 __u8 fip_dlen; /* length - in 32-bit words */
136};
137
138enum fip_desc_type {
139 FIP_DT_PRI = 1, /* priority for forwarder selection */
140 FIP_DT_MAC = 2, /* MAC address */
141 FIP_DT_MAP_OUI = 3, /* FC-MAP OUI */
142 FIP_DT_NAME = 4, /* switch name or node name */
143 FIP_DT_FAB = 5, /* fabric descriptor */
144 FIP_DT_FCOE_SIZE = 6, /* max FCoE frame size */
145 FIP_DT_FLOGI = 7, /* FLOGI request or response */
146 FIP_DT_FDISC = 8, /* FDISC request or response */
147 FIP_DT_LOGO = 9, /* LOGO request or response */
148 FIP_DT_ELP = 10, /* ELP request or response */
149 FIP_DT_VN_ID = 11, /* VN_Node Identifier */
150 FIP_DT_FKA = 12, /* advertisement keep-alive period */
151 FIP_DT_VENDOR = 13, /* vendor ID */
152 FIP_DT_VLAN = 14, /* vlan number */
153 FIP_DT_FC4F = 15, /* FC-4 features */
154 FIP_DT_LIMIT, /* max defined desc_type + 1 */
155 FIP_DT_NON_CRITICAL = 128, /* First non-critical descriptor */
156 FIP_DT_CLR_VLINKS = 128, /* Clear virtual links reason code */
157 FIP_DT_VENDOR_BASE = 241, /* first vendor-specific desc_type */
158};
159
160/*
161 * FIP_DT_PRI - priority descriptor.
162 */
163struct fip_pri_desc {
164 struct fip_desc fd_desc;
165 __u8 fd_resvd;
166 __u8 fd_pri; /* FCF priority: higher is better */
167} __attribute__((packed));
168
169/*
170 * FIP_DT_MAC - MAC address descriptor.
171 */
172struct fip_mac_desc {
173 struct fip_desc fd_desc;
174 __u8 fd_mac[ETH_ALEN];
175} __attribute__((packed));
176
177/*
178 * FIP_DT_MAP - descriptor.
179 */
180struct fip_map_desc {
181 struct fip_desc fd_desc;
182 __u8 fd_resvd[3];
183 __u8 fd_map[3];
184} __attribute__((packed));
185
186/*
187 * FIP_DT_NAME descriptor.
188 */
189struct fip_wwn_desc {
190 struct fip_desc fd_desc;
191 __u8 fd_resvd[2];
192 __be64 fd_wwn; /* 64-bit WWN, unaligned */
193} __attribute__((packed));
194
195/*
196 * FIP_DT_FAB descriptor.
197 */
198struct fip_fab_desc {
199 struct fip_desc fd_desc;
200 __be16 fd_vfid; /* virtual fabric ID */
201 __u8 fd_resvd;
202 __u8 fd_map[3]; /* FC-MAP value */
203 __be64 fd_wwn; /* fabric name, unaligned */
204} __attribute__((packed));
205
206/*
207 * FIP_DT_FCOE_SIZE descriptor.
208 */
209struct fip_size_desc {
210 struct fip_desc fd_desc;
211 __be16 fd_size;
212} __attribute__((packed));
213
214/*
215 * Descriptor that encapsulates an ELS or ILS frame.
216 * The encapsulated frame immediately follows this header, without
217 * SOF, EOF, or CRC.
218 */
219struct fip_encaps {
220 struct fip_desc fd_desc;
221 __u8 fd_resvd[2];
222} __attribute__((packed));
223
224/*
225 * FIP_DT_VN_ID - VN_Node Identifier descriptor.
226 */
227struct fip_vn_desc {
228 struct fip_desc fd_desc;
229 __u8 fd_mac[ETH_ALEN];
230 __u8 fd_resvd;
231 __u8 fd_fc_id[3];
232 __be64 fd_wwpn; /* port name, unaligned */
233} __attribute__((packed));
234
235/*
236 * FIP_DT_FKA - Advertisement keep-alive period.
237 */
238struct fip_fka_desc {
239 struct fip_desc fd_desc;
240 __u8 fd_resvd;
241 __u8 fd_flags; /* bit0 is fka disable flag */
242 __be32 fd_fka_period; /* adv./keep-alive period in mS */
243} __attribute__((packed));
244
245/*
246 * flags for fip_fka_desc.fd_flags
247 */
248enum fip_fka_flags {
249 FIP_FKA_ADV_D = 0x01, /* no need for FKA from ENode */
250};
251
252/* FIP_DT_FKA flags */
253
254/*
255 * FIP_DT_VLAN descriptor
256 */
257struct fip_vlan_desc {
258 struct fip_desc fd_desc;
259 __be16 fd_vlan; /* Note: highest 4 bytes are unused */
260} __attribute__((packed));
261
262/*
263 * FIP_DT_FC4F - FC-4 features.
264 */
265struct fip_fc4_feat {
266 struct fip_desc fd_desc;
267 __u8 fd_resvd[2];
268 struct fc_ns_fts fd_fts;
269 struct fc_ns_ff fd_ff;
270} __attribute__((packed));
271
272/*
273 * FIP_DT_VENDOR descriptor.
274 */
275struct fip_vendor_desc {
276 struct fip_desc fd_desc;
277 __u8 fd_resvd[2];
278 __u8 fd_vendor_id[8];
279} __attribute__((packed));
280
281#endif /* _FC_FIP_H_ */