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TOMOYO Linux Cross Reference
Linux/include/scsi/fc/fc_fc2.h

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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 */
 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 

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