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ahavar.h revision 1.9 
      1 /*	$NetBSD: ahavar.h,v 1.9 1998/11/19 21:52:59 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
      9  * Simulation Facility, NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the NetBSD
     22  *	Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 #include <sys/queue.h>
     41 
     42 /*
     43  * Mail box defs  etc.
     44  * these could be bigger but we need the aha_softc to fit on a single page..
     45  */
     46 #define AHA_MBX_SIZE	16	/* mail box size  (MAX 255 MBxs) */
     47 				/* don't need that many really */
     48 #define AHA_CCB_MAX	16	/* store up to 16 CCBs at one time */
     49 #define	CCB_HASH_SIZE	16	/* hash table size for phystokv */
     50 #define	CCB_HASH_SHIFT	9
     51 #define CCB_HASH(x)	((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
     52 
     53 #define aha_nextmbx(wmb, mbx, mbio) \
     54 	if ((wmb) == &(mbx)->mbio[AHA_MBX_SIZE - 1])	\
     55 		(wmb) = &(mbx)->mbio[0];		\
     56 	else						\
     57 		(wmb)++;
     58 
     59 struct aha_mbx {
     60 	struct aha_mbx_out mbo[AHA_MBX_SIZE];
     61 	struct aha_mbx_in mbi[AHA_MBX_SIZE];
     62 	struct aha_mbx_out *cmbo;	/* Collection Mail Box out */
     63 	struct aha_mbx_out *tmbo;	/* Target Mail Box out */
     64 	struct aha_mbx_in *tmbi;	/* Target Mail Box in */
     65 };
     66 
     67 struct aha_control {
     68 	struct aha_mbx ac_mbx;		/* all our mailboxes */
     69 	struct aha_ccb ac_ccbs[AHA_CCB_MAX]; /* all our control blocks */
     70 };
     71 
     72 struct aha_softc {
     73 	struct device sc_dev;
     74 
     75 	bus_space_tag_t sc_iot;
     76 	bus_space_handle_t sc_ioh;
     77 	bus_dma_tag_t sc_dmat;
     78 	bus_dmamap_t sc_dmamap_control;	/* maps the control structures */
     79 	void *sc_ih;
     80 
     81 	struct aha_control *sc_control;	/* control structures */
     82 
     83 #define	wmbx	(&sc->sc_control->ac_mbx)
     84 
     85 	struct aha_ccb *sc_ccbhash[CCB_HASH_SIZE];
     86 	TAILQ_HEAD(, aha_ccb) sc_free_ccb, sc_waiting_ccb;
     87 	int sc_mbofull;
     88 	struct scsipi_link sc_link;	/* prototype for devs */
     89 	struct scsipi_adapter sc_adapter;
     90 
     91 	LIST_HEAD(, scsipi_xfer) sc_queue;
     92 	struct scsipi_xfer *sc_queuelast;
     93 
     94 	char sc_model[18],
     95 	     sc_firmware[4];
     96 };
     97 
     98 /*
     99  * Offset of a Mail Box In from the beginning of the control DMA mapping.
    100  */
    101 #define	AHA_MBI_OFF(m)	(offsetof(struct aha_control, ac_mbx.mbi[0]) +	\
    102 			    (((u_long)(m)) - ((u_long)&wmbx->mbi[0])))
    103 
    104 /*
    105  * Offset of a Mail Box Out from the beginning of the control DMA mapping.
    106  */
    107 #define	AHA_MBO_OFF(m)	(offsetof(struct aha_control, ac_mbx.mbo[0]) +	\
    108 			    (((u_long)(m)) - ((u_long)&wmbx->mbo[0])))
    109 
    110 /*
    111  * Offset of a CCB from the beginning of the control DMA mapping.
    112  */
    113 #define	AHA_CCB_OFF(c)	(offsetof(struct aha_control, ac_ccbs[0]) +	\
    114 		    (((u_long)(c)) - ((u_long)&sc->sc_control->ac_ccbs[0])))
    115 
    116 struct aha_probe_data {
    117 	int sc_irq, sc_drq;
    118 	int sc_scsi_dev;		/* adapters scsi id */
    119 };
    120 
    121 int	aha_find __P((bus_space_tag_t, bus_space_handle_t,
    122 	    struct aha_probe_data *));
    123 void	aha_attach __P((struct aha_softc *, struct aha_probe_data *));
    124 int	aha_intr __P((void *));
    125