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_FC2_H_ |
9 | #define _FC_FC2_H_ |
10 | |
11 | /* |
12 | * Fibre Channel Exchanges and Sequences. |
13 | */ |
14 | #ifndef PACKED |
15 | #define PACKED __attribute__ ((__packed__)) |
16 | #endif /* PACKED */ |
17 | |
18 | |
19 | /* |
20 | * Sequence Status Block. |
21 | * This format is set by the FC-FS standard and is sent over the wire. |
22 | * Note that the fields aren't all naturally aligned. |
23 | */ |
24 | struct fc_ssb { |
25 | __u8 ssb_seq_id; /* sequence ID */ |
26 | __u8 _ssb_resvd; |
27 | __be16 ssb_low_seq_cnt; /* lowest SEQ_CNT */ |
28 | |
29 | __be16 ssb_high_seq_cnt; /* highest SEQ_CNT */ |
30 | __be16 ssb_s_stat; /* sequence status flags */ |
31 | |
32 | __be16 ssb_err_seq_cnt; /* error SEQ_CNT */ |
33 | __u8 ssb_fh_cs_ctl; /* frame header CS_CTL */ |
34 | __be16 ssb_fh_ox_id; /* frame header OX_ID */ |
35 | __be16 ssb_rx_id; /* responder's exchange ID */ |
36 | __u8 _ssb_resvd2[2]; |
37 | } PACKED; |
38 | |
39 | /* |
40 | * The SSB should be 17 bytes. Since it's layout is somewhat strange, |
41 | * we define the size here so that code can ASSERT that the size comes out |
42 | * correct. |
43 | */ |
44 | #define FC_SSB_SIZE 17 /* length of fc_ssb for assert */ |
45 | |
46 | /* |
47 | * ssb_s_stat - flags from FC-FS-2 T11/1619-D Rev 0.90. |
48 | */ |
49 | #define SSB_ST_RESP (1 << 15) /* sequence responder */ |
50 | #define SSB_ST_ACTIVE (1 << 14) /* sequence is active */ |
51 | #define SSB_ST_ABNORMAL (1 << 12) /* abnormal ending condition */ |
52 | |
53 | #define SSB_ST_REQ_MASK (3 << 10) /* ACK, abort sequence condition */ |
54 | #define SSB_ST_REQ_CONT (0 << 10) |
55 | #define SSB_ST_REQ_ABORT (1 << 10) |
56 | #define SSB_ST_REQ_STOP (2 << 10) |
57 | #define SSB_ST_REQ_RETRANS (3 << 10) |
58 | |
59 | #define SSB_ST_ABTS (1 << 9) /* ABTS protocol completed */ |
60 | #define SSB_ST_RETRANS (1 << 8) /* retransmission completed */ |
61 | #define SSB_ST_TIMEOUT (1 << 7) /* sequence timed out by recipient */ |
62 | #define SSB_ST_P_RJT (1 << 6) /* P_RJT transmitted */ |
63 | |
64 | #define SSB_ST_CLASS_BIT 4 /* class of service field LSB */ |
65 | #define SSB_ST_CLASS_MASK 3 /* class of service mask */ |
66 | #define SSB_ST_ACK (1 << 3) /* ACK (EOFt or EOFdt) transmitted */ |
67 | |
68 | /* |
69 | * Exchange Status Block. |
70 | * This format is set by the FC-FS standard and is sent over the wire. |
71 | * Note that the fields aren't all naturally aligned. |
72 | */ |
73 | struct fc_esb { |
74 | __u8 esb_cs_ctl; /* CS_CTL for frame header */ |
75 | __be16 esb_ox_id; /* originator exchange ID */ |
76 | __be16 esb_rx_id; /* responder exchange ID */ |
77 | __be32 esb_orig_fid; /* fabric ID of originator */ |
78 | __be32 esb_resp_fid; /* fabric ID of responder */ |
79 | __be32 esb_e_stat; /* status */ |
80 | __u8 _esb_resvd[4]; |
81 | __u8 esb_service_params[112]; /* TBD */ |
82 | __u8 esb_seq_status[8]; /* sequence statuses, 8 bytes each */ |
83 | } __attribute__((packed)); |
84 | |
85 | /* |
86 | * Define expected size for ASSERTs. |
87 | * See comments on FC_SSB_SIZE. |
88 | */ |
89 | #define FC_ESB_SIZE (1 + 5*4 + 112 + 8) /* expected size */ |
90 | |
91 | /* |
92 | * esb_e_stat - flags from FC-FS-2 T11/1619-D Rev 0.90. |
93 | */ |
94 | #define ESB_ST_RESP (1 << 31) /* responder to exchange */ |
95 | #define ESB_ST_SEQ_INIT (1 << 30) /* port holds sequence initiative */ |
96 | #define ESB_ST_COMPLETE (1 << 29) /* exchange is complete */ |
97 | #define ESB_ST_ABNORMAL (1 << 28) /* abnormal ending condition */ |
98 | #define ESB_ST_REC_QUAL (1 << 26) /* recovery qualifier active */ |
99 | |
100 | #define ESB_ST_ERRP_BIT 24 /* LSB for error policy */ |
101 | #define ESB_ST_ERRP_MASK (3 << 24) /* mask for error policy */ |
102 | #define ESB_ST_ERRP_MULT (0 << 24) /* abort, discard multiple sequences */ |
103 | #define ESB_ST_ERRP_SING (1 << 24) /* abort, discard single sequence */ |
104 | #define ESB_ST_ERRP_INF (2 << 24) /* process with infinite buffers */ |
105 | #define ESB_ST_ERRP_IMM (3 << 24) /* discard mult. with immed. retran. */ |
106 | |
107 | #define ESB_ST_OX_ID_INVL (1 << 23) /* originator XID invalid */ |
108 | #define ESB_ST_RX_ID_INVL (1 << 22) /* responder XID invalid */ |
109 | #define ESB_ST_PRI_INUSE (1 << 21) /* priority / preemption in use */ |
110 | |
111 | #endif /* _FC_FC2_H_ */ |
112 | |