The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/siopvar.h

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    1 /*      $OpenBSD: siopvar.h,v 1.13 2005/11/20 22:32:48 krw Exp $ */
    2 /*      $NetBSD: siopvar.h,v 1.22 2005/11/18 23:10:32 bouyer Exp $      */
    3 
    4 /*
    5  * Copyright (c) 2000 Manuel Bouyer.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Manuel Bouyer.
   18  * 4. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   31  *
   32  */
   33 
   34 /* structure and definitions for the siop driver */
   35 
   36 /* Number of tag */
   37 #define SIOP_NTAG 16
   38 
   39 /*
   40  * xfer description of the script: tables and reselect script
   41  * In struct siop_common_cmd siop_xfer will point to this.
   42  */
   43 struct siop_xfer {
   44         struct siop_common_xfer siop_tables;
   45         /* u_int32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */
   46         /* Add some entries to make size 384 bytes (256+128) */
   47         u_int32_t resel[36];
   48 } __packed;
   49 
   50 /*
   51  * This describes a command handled by the SCSI controller
   52  * These are chained in either a free list or an active list
   53  * We have one queue per target
   54  */
   55 
   56 struct siop_cmd {
   57         TAILQ_ENTRY (siop_cmd) next;
   58         struct siop_common_cmd cmd_c;
   59         struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
   60         int reselslot;
   61         u_int32_t saved_offset; /* offset in table after disc without sdp */
   62 };
   63 #define cmd_tables cmd_c.siop_tables
   64 
   65 /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
   66 struct siop_cbd {
   67         TAILQ_ENTRY (siop_cbd) next;
   68         struct siop_cmd *cmds;
   69         struct siop_xfer *xfers;
   70         bus_dmamap_t xferdma; /* DMA map for this block of xfers */
   71 };
   72 
   73 /* per-tag struct */
   74 struct siop_tag {
   75         struct siop_cmd *active; /* active command */
   76         u_int reseloff;
   77 };
   78 
   79 /* per lun struct */
   80 struct siop_lun {
   81         struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
   82         int lun_flags;
   83 #define SIOP_LUNF_FULL 0x01 /* queue full message */
   84         u_int reseloff;
   85 };
   86 
   87 /*
   88  * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
   89  * will point to this
   90  */
   91 struct siop_target {
   92         struct siop_common_target target_c;
   93         struct siop_lun *siop_lun[8]; /* per-lun state */
   94         u_int reseloff;
   95         struct siop_lunsw *lunsw;
   96 };
   97 
   98 struct siop_lunsw {
   99         TAILQ_ENTRY (siop_lunsw) next;
  100         u_int32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
  101         u_int32_t lunsw_size; /* size of this lun sw */
  102 };
  103 
  104 
  105 TAILQ_HEAD(cmd_list, siop_cmd);
  106 TAILQ_HEAD(cbd_list, siop_cbd);
  107 TAILQ_HEAD(lunsw_list, siop_lunsw);
  108 
  109 
  110 /* Driver internal state */
  111 struct siop_softc {
  112         struct siop_common_softc sc_c;
  113         int sc_currschedslot;           /* current scheduler slot */
  114         struct cbd_list cmds;           /* list of command block descriptors */
  115         struct cmd_list free_list;      /* cmd descr free list */
  116         struct cmd_list urgent_list;    /* high priority cmd descr list */
  117         struct cmd_list ready_list;     /* cmd descr ready list */
  118         struct lunsw_list lunsw_list;   /* lunsw free list */
  119         u_int32_t script_free_lo;       /* free ram offset from sc_scriptaddr */
  120         u_int32_t script_free_hi;       /* free ram offset from sc_scriptaddr */
  121         int sc_ntargets;                /* number of known targets */
  122         u_int32_t sc_flags;
  123 };
  124 
  125 /* defs for sc_flags */
  126 #define SCF_CHAN_NOSLOT 0x0001          /* channel out of scheduler slot */
  127 
  128 void    siop_attach(struct siop_softc *);
  129 int     siop_intr(void *);
  130 void    siop_add_dev(struct siop_softc *, int, int);
  131 void    siop_del_dev(struct siop_softc *, int, int);

Cache object: 9968ac2e3ee446d10914414d75ab2c96


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