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1 | /* |
2 | * Copyright(c) 2007 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #ifndef _FC_FC2_H_ | |
21 | #define _FC_FC2_H_ | |
22 | ||
23 | /* | |
24 | * Fibre Channel Exchanges and Sequences. | |
25 | */ | |
26 | #ifndef PACKED | |
27 | #define PACKED __attribute__ ((__packed__)) | |
28 | #endif /* PACKED */ | |
29 | ||
30 | ||
31 | /* | |
32 | * Sequence Status Block. | |
33 | * This format is set by the FC-FS standard and is sent over the wire. | |
34 | * Note that the fields aren't all naturally aligned. | |
35 | */ | |
36 | struct fc_ssb { | |
37 | __u8 ssb_seq_id; /* sequence ID */ | |
38 | __u8 _ssb_resvd; | |
39 | __be16 ssb_low_seq_cnt; /* lowest SEQ_CNT */ | |
40 | ||
41 | __be16 ssb_high_seq_cnt; /* highest SEQ_CNT */ | |
42 | __be16 ssb_s_stat; /* sequence status flags */ | |
43 | ||
44 | __be16 ssb_err_seq_cnt; /* error SEQ_CNT */ | |
45 | __u8 ssb_fh_cs_ctl; /* frame header CS_CTL */ | |
46 | __be16 ssb_fh_ox_id; /* frame header OX_ID */ | |
47 | __be16 ssb_rx_id; /* responder's exchange ID */ | |
48 | __u8 _ssb_resvd2[2]; | |
49 | } PACKED; | |
50 | ||
51 | /* | |
52 | * The SSB should be 17 bytes. Since it's layout is somewhat strange, | |
53 | * we define the size here so that code can ASSERT that the size comes out | |
54 | * correct. | |
55 | */ | |
56 | #define FC_SSB_SIZE 17 /* length of fc_ssb for assert */ | |
57 | ||
58 | /* | |
59 | * ssb_s_stat - flags from FC-FS-2 T11/1619-D Rev 0.90. | |
60 | */ | |
61 | #define SSB_ST_RESP (1 << 15) /* sequence responder */ | |
62 | #define SSB_ST_ACTIVE (1 << 14) /* sequence is active */ | |
63 | #define SSB_ST_ABNORMAL (1 << 12) /* abnormal ending condition */ | |
64 | ||
65 | #define SSB_ST_REQ_MASK (3 << 10) /* ACK, abort sequence condition */ | |
66 | #define SSB_ST_REQ_CONT (0 << 10) | |
67 | #define SSB_ST_REQ_ABORT (1 << 10) | |
68 | #define SSB_ST_REQ_STOP (2 << 10) | |
69 | #define SSB_ST_REQ_RETRANS (3 << 10) | |
70 | ||
71 | #define SSB_ST_ABTS (1 << 9) /* ABTS protocol completed */ | |
72 | #define SSB_ST_RETRANS (1 << 8) /* retransmission completed */ | |
73 | #define SSB_ST_TIMEOUT (1 << 7) /* sequence timed out by recipient */ | |
74 | #define SSB_ST_P_RJT (1 << 6) /* P_RJT transmitted */ | |
75 | ||
76 | #define SSB_ST_CLASS_BIT 4 /* class of service field LSB */ | |
77 | #define SSB_ST_CLASS_MASK 3 /* class of service mask */ | |
78 | #define SSB_ST_ACK (1 << 3) /* ACK (EOFt or EOFdt) transmitted */ | |
79 | ||
80 | /* | |
81 | * Exchange Status Block. | |
82 | * This format is set by the FC-FS standard and is sent over the wire. | |
83 | * Note that the fields aren't all naturally aligned. | |
84 | */ | |
85 | struct fc_esb { | |
86 | __u8 esb_cs_ctl; /* CS_CTL for frame header */ | |
87 | __be16 esb_ox_id; /* originator exchange ID */ | |
88 | __be16 esb_rx_id; /* responder exchange ID */ | |
89 | __be32 esb_orig_fid; /* fabric ID of originator */ | |
90 | __be32 esb_resp_fid; /* fabric ID of responder */ | |
91 | __be32 esb_e_stat; /* status */ | |
92 | __u8 _esb_resvd[4]; | |
93 | __u8 esb_service_params[112]; /* TBD */ | |
94 | __u8 esb_seq_status[8]; /* sequence statuses, 8 bytes each */ | |
a419aef8 | 95 | } __attribute__((packed)); |
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96 | |
97 | /* | |
98 | * Define expected size for ASSERTs. | |
99 | * See comments on FC_SSB_SIZE. | |
100 | */ | |
101 | #define FC_ESB_SIZE (1 + 5*4 + 112 + 8) /* expected size */ | |
102 | ||
103 | /* | |
104 | * esb_e_stat - flags from FC-FS-2 T11/1619-D Rev 0.90. | |
105 | */ | |
106 | #define ESB_ST_RESP (1 << 31) /* responder to exchange */ | |
c1d45424 | 107 | #define ESB_ST_SEQ_INIT (1 << 30) /* port holds sequence initiative */ |
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108 | #define ESB_ST_COMPLETE (1 << 29) /* exchange is complete */ |
109 | #define ESB_ST_ABNORMAL (1 << 28) /* abnormal ending condition */ | |
110 | #define ESB_ST_REC_QUAL (1 << 26) /* recovery qualifier active */ | |
111 | ||
112 | #define ESB_ST_ERRP_BIT 24 /* LSB for error policy */ | |
113 | #define ESB_ST_ERRP_MASK (3 << 24) /* mask for error policy */ | |
114 | #define ESB_ST_ERRP_MULT (0 << 24) /* abort, discard multiple sequences */ | |
115 | #define ESB_ST_ERRP_SING (1 << 24) /* abort, discard single sequence */ | |
116 | #define ESB_ST_ERRP_INF (2 << 24) /* process with infinite buffers */ | |
117 | #define ESB_ST_ERRP_IMM (3 << 24) /* discard mult. with immed. retran. */ | |
118 | ||
119 | #define ESB_ST_OX_ID_INVL (1 << 23) /* originator XID invalid */ | |
120 | #define ESB_ST_RX_ID_INVL (1 << 22) /* responder XID invalid */ | |
121 | #define ESB_ST_PRI_INUSE (1 << 21) /* priority / preemption in use */ | |
122 | ||
123 | #endif /* _FC_FC2_H_ */ |