112 lines · c
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.org6 */7 8#ifndef _FC_FC2_H_9#define _FC_FC2_H_10 11/*12 * Fibre Channel Exchanges and Sequences.13 */14#ifndef PACKED15#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 */24struct 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 out42 * 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 */73struct 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