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bhavar.h revision 1.2 
      1 /*	$NetBSD: bhavar.h,v 1.2 1996/09/01 00:54:38 mycroft Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994, 1996 Charles M. Hannum.  All rights reserved.
      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  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Charles M. Hannum.
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Mail box defs  etc.
     34  * these could be bigger but we need the bha_softc to fit on a single page..
     35  */
     36 #define BHA_MBX_SIZE	32	/* mail box size  (MAX 255 MBxs) */
     37 				/* don't need that many really */
     38 #define BHA_CCB_MAX	32	/* store up to 32 CCBs at one time */
     39 #define	CCB_HASH_SIZE	32	/* hash table size for phystokv */
     40 #define	CCB_HASH_SHIFT	9
     41 #define CCB_HASH(x)	((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
     42 
     43 #define bha_nextmbx(wmb, mbx, mbio) \
     44 	if ((wmb) == &(mbx)->mbio[BHA_MBX_SIZE - 1])	\
     45 		(wmb) = &(mbx)->mbio[0];		\
     46 	else						\
     47 		(wmb)++;
     48 
     49 struct bha_mbx {
     50 	struct bha_mbx_out mbo[BHA_MBX_SIZE];
     51 	struct bha_mbx_in mbi[BHA_MBX_SIZE];
     52 	struct bha_mbx_out *cmbo;	/* Collection Mail Box out */
     53 	struct bha_mbx_out *tmbo;	/* Target Mail Box out */
     54 	struct bha_mbx_in *tmbi;	/* Target Mail Box in */
     55 };
     56 
     57 struct bha_softc {
     58 	struct device sc_dev;
     59 	bus_chipset_tag_t sc_bc;
     60 
     61 	bus_io_handle_t sc_ioh;
     62 	int sc_irq, sc_drq;
     63 	void *sc_ih;
     64 
     65 	char sc_model[7],
     66 	     sc_firmware[6];
     67 
     68 	struct bha_mbx sc_mbx;		/* all our mailboxes */
     69 #define	wmbx	(&sc->sc_mbx)
     70 	struct bha_ccb *sc_ccbhash[CCB_HASH_SIZE];
     71 	TAILQ_HEAD(, bha_ccb) sc_free_ccb, sc_waiting_ccb;
     72 	int sc_numccbs, sc_mbofull;
     73 	int sc_scsi_dev;		/* adapters scsi id */
     74 	struct scsi_link sc_link;	/* prototype for devs */
     75 };
     76 
     77 int	bha_find __P((bus_chipset_tag_t, bus_io_handle_t, struct bha_softc *));
     78 void	bha_attach __P((struct bha_softc *));
     79 int	bha_intr __P((void *));
     80