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 /*      $NetBSD: siopvar.h,v 1.28 2009/10/19 18:41:13 bouyer Exp $      */
    2 
    3 /*
    4  * Copyright (c) 2000 Manuel Bouyer.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  */
   27 
   28 /* structure and definitions for the siop driver */
   29 
   30 /* Number of tag */
   31 #define SIOP_NTAG 16
   32 
   33 /*
   34  * xfer description of the script: tables and reselect script
   35  * In struct siop_common_cmd siop_xfer will point to this.
   36  */
   37 struct siop_xfer {
   38         struct siop_common_xfer siop_tables;
   39         /* uint32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */
   40         uint32_t resel[25];
   41 } __packed;
   42 
   43 /*
   44  * This describes a command handled by the SCSI controller
   45  * These are chained in either a free list or a active list
   46  * We have one queue per target
   47  */
   48 
   49 struct siop_cmd {
   50         TAILQ_ENTRY (siop_cmd) next;
   51         struct siop_common_cmd cmd_c;
   52         struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
   53         int reselslot;
   54         uint32_t saved_offset; /* offset in table after disc without sdp */
   55 };
   56 #define cmd_tables cmd_c.siop_tables
   57 
   58 /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
   59 struct siop_cbd {
   60         TAILQ_ENTRY (siop_cbd) next;
   61         struct siop_cmd *cmds;
   62         struct siop_xfer *xfers;
   63         bus_dmamap_t xferdma; /* DMA map for this block of xfers */
   64 };
   65 
   66 /* per-tag struct */
   67 struct siop_tag {
   68         struct siop_cmd *active; /* active command */
   69         u_int reseloff;
   70 };
   71 
   72 /* per lun struct */
   73 struct siop_lun {
   74         struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
   75         int lun_flags; /* per-lun flags, none currently */
   76         u_int reseloff;
   77 };
   78 
   79 /*
   80  * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
   81  * will point to this
   82  */
   83 struct siop_target {
   84         struct siop_common_target target_c;
   85         struct siop_lun *siop_lun[8]; /* per-lun state */
   86         u_int reseloff;
   87         struct siop_lunsw *lunsw;
   88 };
   89 
   90 struct siop_lunsw {
   91         TAILQ_ENTRY (siop_lunsw) next;
   92         uint32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
   93         uint32_t lunsw_size; /* size of this lun sw */
   94 };
   95 
   96 static __inline void siop_table_sync(struct siop_cmd *, int);
   97 static __inline void
   98 siop_table_sync(struct siop_cmd *siop_cmd, int ops)
   99 {
  100         struct siop_common_softc *sc  = siop_cmd->cmd_c.siop_sc;
  101         bus_addr_t offset;
  102 
  103         offset = siop_cmd->cmd_c.dsa -
  104             siop_cmd->siop_cbdp->xferdma->dm_segs[0].ds_addr;
  105         bus_dmamap_sync(sc->sc_dmat, siop_cmd->siop_cbdp->xferdma, offset,
  106             sizeof(struct siop_xfer), ops);
  107 }
  108 
  109 
  110 TAILQ_HEAD(cmd_list, siop_cmd);
  111 TAILQ_HEAD(cbd_list, siop_cbd);
  112 TAILQ_HEAD(lunsw_list, siop_lunsw);
  113 
  114 
  115 /* Driver internal state */
  116 struct siop_softc {
  117         struct siop_common_softc sc_c;
  118         int sc_currschedslot;           /* current scheduler slot */
  119         struct cbd_list cmds;           /* list of command block descriptors */
  120         struct cmd_list free_list;      /* cmd descr free list */
  121         struct lunsw_list lunsw_list;   /* lunsw free list */
  122         uint32_t script_free_lo;        /* free ram offset from sc_scriptaddr */
  123         uint32_t script_free_hi;        /* free ram offset from sc_scriptaddr */
  124         int sc_ntargets;                /* number of known targets */
  125         uint32_t sc_flags;
  126 };
  127 
  128 /* defs for sc_flags */
  129 #define SCF_CHAN_NOSLOT 0x0001          /* channel out of scheduler slot */
  130 
  131 void    siop_attach(struct siop_softc *);
  132 int     siop_intr(void *);
  133 void    siop_add_dev(struct siop_softc *, int, int);
  134 void    siop_del_dev(struct siop_softc *, int, int);

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