/*      $NetBSD: uhavar.h,v 1.16 2012/10/27 17:18:23 chs 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.
*/

#include <sys/queue.h>

#define UHA_MSCP_MAX    32      /* store up to 32 MSCPs at one time */
#define MSCP_HASH_SIZE  32      /* hash table size for phystokv */
#define MSCP_HASH_SHIFT 9
#define MSCP_HASH(x)    ((((long)(x))>>MSCP_HASH_SHIFT) & (MSCP_HASH_SIZE - 1))

struct uha_softc {
       device_t sc_dev;

       bus_space_tag_t sc_iot;
       bus_space_handle_t sc_ioh;
       bus_dma_tag_t   sc_dmat;
       void *sc_ih;

       int sc_dmaflags;        /* bus-specific DMA map creation flags */

       void (*start_mbox)(struct uha_softc *, struct uha_mscp *);
       int (*poll)(struct uha_softc *, struct scsipi_xfer *, int);
       void (*init)(struct uha_softc *);

       bus_dmamap_t sc_dmamap_mscp;    /* maps the mscps */
       struct uha_mscp *sc_mscps;      /* all our mscps */

       struct uha_mscp *sc_mscphash[MSCP_HASH_SIZE];
       TAILQ_HEAD(, uha_mscp) sc_free_mscp;
       int sc_nummscps;

       struct scsipi_adapter sc_adapter;
       struct scsipi_channel sc_channel;
};

/*
* Offset of an MSCP from the beginning of the MSCP DMA mapping.
*/
#define UHA_MSCP_OFF(m) (((u_long)(m)) - ((u_long)&sc->sc_mscps[0]))

struct uha_probe_data {
       int sc_irq, sc_drq;
       int sc_scsi_dev;
};

void    uha_attach(struct uha_softc *, struct uha_probe_data *);
void    uha_timeout(void *arg);
struct  uha_mscp *uha_mscp_phys_kv(struct uha_softc *, u_long);
void    uha_done(struct uha_softc *, struct uha_mscp *);