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a61127c2 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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2 | /* |
3 | * Copyright(c) 2007 Intel Corporation. All rights reserved. | |
4 | * | |
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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 */ | |
a419aef8 | 83 | } __attribute__((packed)); |
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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 */ | |
c1d45424 | 95 | #define ESB_ST_SEQ_INIT (1 << 30) /* port holds sequence initiative */ |
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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_ */ |