/*      $OpenBSD: cacvar.h,v 1.9 2020/07/22 13:16:04 krw Exp $  */
/*      $NetBSD: cacvar.h,v 1.7 2000/10/19 14:28:47 ad Exp $    */

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Andrew Doran.
 *
 * 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 _IC_CACVAR_H_
#define _IC_CACVAR_H_

#define CAC_MAX_CCBS    128
#define CAC_MAX_XFER    (0xffff * 512)
#define CAC_SG_SIZE     32
#define CAC_SECTOR_SIZE 512

#define cac_inb(sc, port) \
        bus_space_read_1((sc)->sc_iot, (sc)->sc_ioh, port)
#define cac_inw(sc, port) \
        bus_space_read_2((sc)->sc_iot, (sc)->sc_ioh, port)
#define cac_inl(sc, port) \
        bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, port)
#define cac_outb(sc, port, val) \
        bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, port, val)
#define cac_outw(sc, port, val) \
        bus_space_write_2((sc)->sc_iot, (sc)->sc_ioh, port, val)
#define cac_outl(sc, port, val) \
        bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, port, val)

/*
 * Stupid macros to deal with alignment/endianness issues.
 */

#define CAC_GET1(x)                                                     \
        (((u_char *)&(x))[0])
#define CAC_GET2(x)                                                     \
        (((u_char *)&(x))[0] | (((u_char *)&(x))[1] << 8))
#define CAC_GET4(x)                                                     \
        ((((u_char *)&(x))[0] | (((u_char *)&(x))[1] << 8)) |           \
        (((u_char *)&(x))[2] << 16 | (((u_char *)&(x))[3] << 24)))

struct cac_ccb {
        /* Data the controller will touch - 276 bytes */
        struct cac_hdr  ccb_hdr;
        struct cac_req  ccb_req;
        struct cac_sgb  ccb_seg[CAC_SG_SIZE];

        /* Data the controller won't touch */
        int             ccb_flags;
        int             ccb_datasize;
        paddr_t         ccb_paddr;
        bus_dmamap_t    ccb_dmamap_xfer;
        SIMPLEQ_ENTRY(cac_ccb) ccb_chain;
        struct scsi_xfer *ccb_xs;
};

#define CAC_CCB_DATA_IN         0x0001  /* Map describes inbound xfer */
#define CAC_CCB_DATA_OUT        0x0002  /* Map describes outbound xfer */
#define CAC_CCB_ACTIVE          0x0004  /* Command submitted to controller */

struct cac_softc;

struct cac_linkage {
        struct  cac_ccb *(*cl_completed)(struct cac_softc *);
        int     (*cl_fifo_full)(struct cac_softc *);
        void    (*cl_intr_enable)(struct cac_softc *, int);
        int     (*cl_intr_pending)(struct cac_softc *);
        void    (*cl_submit)(struct cac_softc *, struct cac_ccb *);
};

struct cac_softc {
        struct device           sc_dv;
        bus_space_tag_t         sc_iot;
        bus_space_handle_t      sc_ioh;
        bus_dma_tag_t           sc_dmat;
        bus_dmamap_t            sc_dmamap;
        int                     sc_nunits;
        void                    *sc_ih;
        struct scsibus_softc    *sc_scsibus;
        const struct cac_linkage        *sc_cl;
        caddr_t                 sc_ccbs;
        paddr_t                 sc_ccbs_paddr;
        SIMPLEQ_HEAD(, cac_ccb) sc_ccb_free;    
        SIMPLEQ_HEAD(, cac_ccb) sc_ccb_queue;
        struct cac_drive_info   *sc_dinfos;
        int                     (*sc_ioctl)(struct device *, u_long, caddr_t);
        struct ksensor          *sc_sensors;
        struct ksensordev       sc_sensordev;

        struct mutex            sc_ccb_mtx; /* ccb queue protection */
        struct scsi_iopool      sc_iopool;
};

/* XXX These have to become spinlocks in case of fine SMP */
#define CAC_LOCK(sc) splbio()
#define CAC_UNLOCK(sc, lock) splx(lock)
typedef int cac_lock_t;

int     cac_init(struct cac_softc *, int);
int     cac_intr(void *);
int     cac_flush(struct cac_softc *);

extern const struct     cac_linkage cac_l0;

#endif  /* !_IC_CACVAR_H_ */