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 */ 95 } __attribute__((packed)); 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 */ 107 #define ESB_ST_SEQ_INIT (1 << 30) /* port holds sequence initiative */ 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_ */ 124