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

     /*      $NetBSD: ahavar.h,v 1.14 2008/04/28 20:23:49 martin Exp $       */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
      * Simulation Facility, NASA Ames Research Center.
     *
     * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``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 FOUNDATION OR CONTRIBUTORS
     * 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.
     */
    
    #ifndef _DEV_IC_AHAVAR_H_
    #define _DEV_IC_AHAVAR_H_
    
    #include <sys/queue.h>
    
    /*
     * Mail box defs  etc.
     * these could be bigger but we need the aha_softc to fit on a single page..
     */
    #define AHA_MBX_SIZE    16      /* mail box size  (MAX 255 MBxs) */
                                    /* don't need that many really */
    #define AHA_CCB_MAX     16      /* store up to 16 CCBs at one time */
    #define CCB_HASH_SIZE   16      /* hash table size for phystokv */
    #define CCB_HASH_SHIFT  9
    #define CCB_HASH(x)     ((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
    
    #define aha_nextmbx(wmb, mbx, mbio) \
            if ((wmb) == &(mbx)->mbio[AHA_MBX_SIZE - 1])    \
                    (wmb) = &(mbx)->mbio[0];                \
            else                                            \
                    (wmb)++;
    
    struct aha_mbx {
            struct aha_mbx_out mbo[AHA_MBX_SIZE];
            struct aha_mbx_in mbi[AHA_MBX_SIZE];
            struct aha_mbx_out *cmbo;       /* Collection Mail Box out */
            struct aha_mbx_out *tmbo;       /* Target Mail Box out */
            struct aha_mbx_in *tmbi;        /* Target Mail Box in */
    };
    
    struct aha_control {
            struct aha_mbx ac_mbx;          /* all our mailboxes */
            struct aha_ccb ac_ccbs[AHA_CCB_MAX]; /* all our control blocks */
    };
    
    struct aha_softc {
            struct device sc_dev;
    
            bus_space_tag_t sc_iot;
            bus_space_handle_t sc_ioh;
            bus_dma_tag_t sc_dmat;
            bus_dmamap_t sc_dmamap_control; /* maps the control structures */
            void *sc_ih;
    
            struct aha_control *sc_control; /* control structures */
    
    #define wmbx    (&sc->sc_control->ac_mbx)
    
            struct aha_ccb *sc_ccbhash[CCB_HASH_SIZE];
            TAILQ_HEAD(, aha_ccb) sc_free_ccb, sc_waiting_ccb;
            int sc_mbofull;
    
            struct scsipi_adapter sc_adapter;
            struct scsipi_channel sc_channel;
    
            char sc_model[18],
                 sc_firmware[4];
    };
    
    /*
     * Offset of a Mail Box In from the beginning of the control DMA mapping.
     */
    #define AHA_MBI_OFF(m)  (offsetof(struct aha_control, ac_mbx.mbi[0]) +  \
                                (((u_long)(m)) - ((u_long)&wmbx->mbi[0])))
    
    /*
     * Offset of a Mail Box Out from the beginning of the control DMA mapping.
    */
   #define AHA_MBO_OFF(m)  (offsetof(struct aha_control, ac_mbx.mbo[0]) +  \
                               (((u_long)(m)) - ((u_long)&wmbx->mbo[0])))
   
   /*
    * Offset of a CCB from the beginning of the control DMA mapping.
    */
   #define AHA_CCB_OFF(c)  (offsetof(struct aha_control, ac_ccbs[0]) +     \
                       (((u_long)(c)) - ((u_long)&sc->sc_control->ac_ccbs[0])))
   
   struct aha_probe_data {
           int sc_irq, sc_drq;
           int sc_scsi_dev;                /* adapters scsi id */
   };
   
   int     aha_find(bus_space_tag_t, bus_space_handle_t,
               struct aha_probe_data *);
   void    aha_attach(struct aha_softc *, struct aha_probe_data *);
   int     aha_intr(void *);
   
   #endif /* _DEV_IC_AHAVAR_H_ */

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