drivers/scsi/bfa/include/protocol/fcp.h

   1 /*
   2  * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #ifndef __FCPPROTO_H__
  19 #define __FCPPROTO_H__
  20
  21 #include <protocol/scsi.h>
  22
  23 #pragma pack(1)
  24
  25 enum {
  26         FCP_RJT         = 0x01000000,   /* SRR reject */
  27         FCP_SRR_ACCEPT  = 0x02000000,   /* SRR accept */
  28         FCP_SRR         = 0x14000000,   /* Sequence Retransmission Request */
  29 };
  30
  31 /*
  32  * SRR FC-4 LS payload
  33  */
  34 struct fc_srr_s{
  35         u32     ls_cmd;
  36         u32        ox_id:16;    /* ox-id */
  37         u32        rx_id:16;    /* rx-id */
  38         u32        ro;          /* relative offset */
  39         u32        r_ctl:8;             /* R_CTL for I.U. */
  40         u32        res:24;
  41 };
  42
  43
  44 /*
  45  * FCP_CMND definitions
  46  */
  47 #define FCP_CMND_CDB_LEN    16
  48 #define FCP_CMND_LUN_LEN    8
  49
  50 struct fcp_cmnd_s{
  51         lun_t           lun;            /* 64-bit LU number */
  52         u8         crn;         /* command reference number */
  53 #ifdef __BIGENDIAN
  54         u8         resvd:1,
  55                         priority:4,     /* FCP-3: SAM-3 priority */
  56                         taskattr:3;     /* scsi task attribute */
  57 #else
  58         u8         taskattr:3,  /* scsi task attribute */
  59                         priority:4,     /* FCP-3: SAM-3 priority */
  60                         resvd:1;
  61 #endif
  62         u8         tm_flags;    /* task management flags */
  63 #ifdef __BIGENDIAN
  64         u8         addl_cdb_len:6,      /* additional CDB length words */
  65                         iodir:2;        /* read/write FCP_DATA IUs */
  66 #else
  67         u8         iodir:2,     /* read/write FCP_DATA IUs */
  68                         addl_cdb_len:6; /* additional CDB length */
  69 #endif
  70         struct scsi_cdb_s      cdb;
  71
  72         /*
  73          * !!! additional cdb bytes follows here!!!
  74          */
  75         u32        fcp_dl;      /* bytes to be transferred */
  76 };
  77
  78 #define fcp_cmnd_cdb_len(_cmnd) ((_cmnd)->addl_cdb_len * 4 + FCP_CMND_CDB_LEN)
  79 #define fcp_cmnd_fcpdl(_cmnd)   ((&(_cmnd)->fcp_dl)[(_cmnd)->addl_cdb_len])
  80
  81 /*
  82  * fcp_cmnd_t.iodir field values
  83  */
  84 enum fcp_iodir{
  85         FCP_IODIR_NONE  = 0,
  86         FCP_IODIR_WRITE = 1,
  87         FCP_IODIR_READ  = 2,
  88         FCP_IODIR_RW    = 3,
  89 };
  90
  91 /*
  92  * Task attribute field
  93  */
  94 enum {
  95         FCP_TASK_ATTR_SIMPLE    = 0,
  96         FCP_TASK_ATTR_HOQ       = 1,
  97         FCP_TASK_ATTR_ORDERED   = 2,
  98         FCP_TASK_ATTR_ACA       = 4,
  99         FCP_TASK_ATTR_UNTAGGED  = 5,    /* obsolete in FCP-3 */
 100 };
 101
 102 /*
 103  * Task management flags field - only one bit shall be set
 104  */
 105 #ifndef BIT
 106 #define BIT(_x) (1 << (_x))
 107 #endif
 108 enum fcp_tm_cmnd{
 109         FCP_TM_ABORT_TASK_SET   = BIT(1),
 110         FCP_TM_CLEAR_TASK_SET   = BIT(2),
 111         FCP_TM_LUN_RESET        = BIT(4),
 112         FCP_TM_TARGET_RESET     = BIT(5),       /* obsolete in FCP-3 */
 113         FCP_TM_CLEAR_ACA        = BIT(6),
 114 };
 115
 116 /*
 117  * FCP_XFER_RDY IU defines
 118  */
 119 struct fcp_xfer_rdy_s{
 120         u32        data_ro;
 121         u32        burst_len;
 122         u32        reserved;
 123 };
 124
 125 /*
 126  * FCP_RSP residue flags
 127  */
 128 enum fcp_residue{
 129         FCP_NO_RESIDUE = 0,     /* no residue */
 130         FCP_RESID_OVER = 1,     /* more data left that was not sent */
 131         FCP_RESID_UNDER = 2,    /* less data than requested */
 132 };
 133
 134 enum {
 135         FCP_RSPINFO_GOOD = 0,
 136         FCP_RSPINFO_DATALEN_MISMATCH = 1,
 137         FCP_RSPINFO_CMND_INVALID = 2,
 138         FCP_RSPINFO_ROLEN_MISMATCH = 3,
 139         FCP_RSPINFO_TM_NOT_SUPP = 4,
 140         FCP_RSPINFO_TM_FAILED = 5,
 141 };
 142
 143 struct fcp_rspinfo_s{
 144         u32        res0:24;
 145         u32        rsp_code:8;  /* response code (as above) */
 146         u32        res1;
 147 };
 148
 149 struct fcp_resp_s{
 150         u32        reserved[2]; /* 2 words reserved */
 151         u16        reserved2;
 152 #ifdef __BIGENDIAN
 153         u8         reserved3:3;
 154         u8         fcp_conf_req:1;      /* FCP_CONF is requested */
 155         u8         resid_flags:2;       /* underflow/overflow */
 156         u8         sns_len_valid:1;/* sense len is valid */
 157         u8         rsp_len_valid:1;/* response len is valid */
 158 #else
 159         u8         rsp_len_valid:1;/* response len is valid */
 160         u8         sns_len_valid:1;/* sense len is valid */
 161         u8         resid_flags:2;       /* underflow/overflow */
 162         u8         fcp_conf_req:1;      /* FCP_CONF is requested */
 163         u8         reserved3:3;
 164 #endif
 165         u8         scsi_status; /* one byte SCSI status */
 166         u32        residue;     /* residual data bytes */
 167         u32        sns_len;     /* length od sense info */
 168         u32        rsp_len;     /* length of response info */
 169 };
 170
 171 #define fcp_snslen(__fcprsp)    ((__fcprsp)->sns_len_valid ?            \
 172                                         (__fcprsp)->sns_len : 0)
 173 #define fcp_rsplen(__fcprsp)    ((__fcprsp)->rsp_len_valid ?            \
 174                                         (__fcprsp)->rsp_len : 0)
 175 #define fcp_rspinfo(__fcprsp)   ((struct fcp_rspinfo_s *)((__fcprsp) + 1))
 176 #define fcp_snsinfo(__fcprsp)   (((u8 *)fcp_rspinfo(__fcprsp)) +        \
 177                                                 fcp_rsplen(__fcprsp))
 178
 179 struct fcp_cmnd_fr_s{
 180         struct fchs_s          fchs;
 181         struct fcp_cmnd_s      fcp;
 182 };
 183
 184 #pragma pack()
 185
 186 #endif