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      1 /*	$NetBSD: ahavar.h,v 1.15 2009/09/21 08:12:47 tsutsui 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  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _DEV_IC_AHAVAR_H_
     34 #define	_DEV_IC_AHAVAR_H_
     35 
     36 #include <sys/queue.h>
     37 
     38 /*
     39  * Mail box defs  etc.
     40  * these could be bigger but we need the aha_softc to fit on a single page..
     41  */
     42 #define AHA_MBX_SIZE	16	/* mail box size  (MAX 255 MBxs) */
     43 				/* don't need that many really */
     44 #define AHA_CCB_MAX	16	/* store up to 16 CCBs at one time */
     45 #define	CCB_HASH_SIZE	16	/* hash table size for phystokv */
     46 #define	CCB_HASH_SHIFT	9
     47 #define CCB_HASH(x)	((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
     48 
     49 #define aha_nextmbx(wmb, mbx, mbio) \
     50 	if ((wmb) == &(mbx)->mbio[AHA_MBX_SIZE - 1])	\
     51 		(wmb) = &(mbx)->mbio[0];		\
     52 	else						\
     53 		(wmb)++;
     54 
     55 struct aha_mbx {
     56 	struct aha_mbx_out mbo[AHA_MBX_SIZE];
     57 	struct aha_mbx_in mbi[AHA_MBX_SIZE];
     58 	struct aha_mbx_out *cmbo;	/* Collection Mail Box out */
     59 	struct aha_mbx_out *tmbo;	/* Target Mail Box out */
     60 	struct aha_mbx_in *tmbi;	/* Target Mail Box in */
     61 };
     62 
     63 struct aha_control {
     64 	struct aha_mbx ac_mbx;		/* all our mailboxes */
     65 	struct aha_ccb ac_ccbs[AHA_CCB_MAX]; /* all our control blocks */
     66 };
     67 
     68 struct aha_softc {
     69 	device_t sc_dev;
     70 
     71 	bus_space_tag_t sc_iot;
     72 	bus_space_handle_t sc_ioh;
     73 	bus_dma_tag_t sc_dmat;
     74 	bus_dmamap_t sc_dmamap_control;	/* maps the control structures */
     75 	void *sc_ih;
     76 
     77 	struct aha_control *sc_control;	/* control structures */
     78 
     79 #define	wmbx	(&sc->sc_control->ac_mbx)
     80 
     81 	struct aha_ccb *sc_ccbhash[CCB_HASH_SIZE];
     82 	TAILQ_HEAD(, aha_ccb) sc_free_ccb, sc_waiting_ccb;
     83 	int sc_mbofull;
     84 
     85 	struct scsipi_adapter sc_adapter;
     86 	struct scsipi_channel sc_channel;
     87 
     88 	char sc_model[18],
     89 	     sc_firmware[4];
     90 };
     91 
     92 /*
     93  * Offset of a Mail Box In from the beginning of the control DMA mapping.
     94  */
     95 #define	AHA_MBI_OFF(m)	(offsetof(struct aha_control, ac_mbx.mbi[0]) +	\
     96 			    (((u_long)(m)) - ((u_long)&wmbx->mbi[0])))
     97 
     98 /*
     99  * Offset of a Mail Box Out from the beginning of the control DMA mapping.
    100  */
    101 #define	AHA_MBO_OFF(m)	(offsetof(struct aha_control, ac_mbx.mbo[0]) +	\
    102 			    (((u_long)(m)) - ((u_long)&wmbx->mbo[0])))
    103 
    104 /*
    105  * Offset of a CCB from the beginning of the control DMA mapping.
    106  */
    107 #define	AHA_CCB_OFF(c)	(offsetof(struct aha_control, ac_ccbs[0]) +	\
    108 		    (((u_long)(c)) - ((u_long)&sc->sc_control->ac_ccbs[0])))
    109 
    110 struct aha_probe_data {
    111 	int sc_irq, sc_drq;
    112 	int sc_scsi_dev;		/* adapters scsi id */
    113 };
    114 
    115 int	aha_find(bus_space_tag_t, bus_space_handle_t,
    116 	    struct aha_probe_data *);
    117 void	aha_attach(struct aha_softc *, struct aha_probe_data *);
    118 int	aha_intr(void *);
    119 
    120 #endif /* _DEV_IC_AHAVAR_H_ */
    121