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

     /*      $NetBSD: siopvar.h,v 1.29 2012/08/24 09:01:23 msaitoh Exp $     */
     
     /*
      * Copyright (c) 2000 Manuel Bouyer.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     */
    
    /* structure and definitions for the siop driver */
    
    /* Number of tag */
    #define SIOP_NTAG 16
    
    /*
     * xfer description of the script: tables and reselect script
     * In struct siop_common_cmd siop_xfer will point to this.
     */
    struct siop_xfer {
            struct siop_common_xfer siop_tables;
            /* uint32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */
            uint32_t resel[25];
    } __packed;
    
    /*
     * This describes a command handled by the SCSI controller
     * These are chained in either a free list or an active list
     * We have one queue per target
     */
    
    struct siop_cmd {
            TAILQ_ENTRY (siop_cmd) next;
            struct siop_common_cmd cmd_c;
            struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
            int reselslot;
            uint32_t saved_offset; /* offset in table after disc without sdp */
    };
    #define cmd_tables cmd_c.siop_tables
    
    /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
    struct siop_cbd {
            TAILQ_ENTRY (siop_cbd) next;
            struct siop_cmd *cmds;
            struct siop_xfer *xfers;
            bus_dmamap_t xferdma; /* DMA map for this block of xfers */
    };
    
    /* per-tag struct */
    struct siop_tag {
            struct siop_cmd *active; /* active command */
            u_int reseloff;
    };
    
    /* per lun struct */
    struct siop_lun {
            struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
            int lun_flags; /* per-lun flags, none currently */
            u_int reseloff;
    };
    
    /*
     * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
     * will point to this
     */
    struct siop_target {
            struct siop_common_target target_c;
            struct siop_lun *siop_lun[8]; /* per-lun state */
            u_int reseloff;
            struct siop_lunsw *lunsw;
    };
    
    struct siop_lunsw {
            TAILQ_ENTRY (siop_lunsw) next;
            uint32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
            uint32_t lunsw_size; /* size of this lun sw */
    };
    
    static __inline void siop_table_sync(struct siop_cmd *, int);
    static __inline void
    siop_table_sync(struct siop_cmd *siop_cmd, int ops)
    {
           struct siop_common_softc *sc  = siop_cmd->cmd_c.siop_sc;
           bus_addr_t offset;
   
           offset = siop_cmd->cmd_c.dsa -
               siop_cmd->siop_cbdp->xferdma->dm_segs[0].ds_addr;
           bus_dmamap_sync(sc->sc_dmat, siop_cmd->siop_cbdp->xferdma, offset,
               sizeof(struct siop_xfer), ops);
   }
   
   
   TAILQ_HEAD(cmd_list, siop_cmd);
   TAILQ_HEAD(cbd_list, siop_cbd);
   TAILQ_HEAD(lunsw_list, siop_lunsw);
   
   
   /* Driver internal state */
   struct siop_softc {
           struct siop_common_softc sc_c;
           int sc_currschedslot;           /* current scheduler slot */
           struct cbd_list cmds;           /* list of command block descriptors */
           struct cmd_list free_list;      /* cmd descr free list */
           struct lunsw_list lunsw_list;   /* lunsw free list */
           uint32_t script_free_lo;        /* free ram offset from sc_scriptaddr */
           uint32_t script_free_hi;        /* free ram offset from sc_scriptaddr */
           int sc_ntargets;                /* number of known targets */
           uint32_t sc_flags;
   };
   
   /* defs for sc_flags */
   #define SCF_CHAN_NOSLOT 0x0001          /* channel out of scheduler slot */
   
   void    siop_attach(struct siop_softc *);
   int     siop_intr(void *);
   void    siop_add_dev(struct siop_softc *, int, int);
   void    siop_del_dev(struct siop_softc *, int, int);

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