/*      $OpenBSD: twevar.h,v 1.14 2020/07/22 13:16:04 krw Exp $ */

/*
 * Copyright (c) 2000 Michael Shalayeff
 * All rights reserved.
 *
 * 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 AUTHOR ``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 AUTHOR OR HIS RELATIVES 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 MIND, 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.
 */

struct twe_softc;

struct twe_ccb {
        struct twe_softc        *ccb_sc;
        struct twe_cmd          *ccb_cmd;
        struct scsi_xfer        *ccb_xs;
        paddr_t                 ccb_cmdpa;
        TAILQ_ENTRY(twe_ccb)    ccb_link;
        enum {
                TWE_CCB_FREE, TWE_CCB_READY, TWE_CCB_QUEUED, TWE_CCB_PREQUEUED,
                TWE_CCB_DONE
        } ccb_state;
        int                     ccb_length;
        void                    *ccb_data;
        void                    *ccb_realdata;
        bus_dmamap_t            ccb_dmamap;
        bus_dma_segment_t       ccb_2bseg[TWE_MAXOFFSETS];
        int                     ccb_2nseg;
};

typedef TAILQ_HEAD(twe_queue_head, twe_ccb)     twe_queue_head;

struct twe_softc {
        struct device   sc_dev;
        void            *sc_ih;
        struct proc     *sc_thread;
        int             sc_thread_on;

        bus_space_tag_t iot;
        bus_space_handle_t ioh;
        bus_dma_tag_t   dmat;

        void *sc_cmds;
        bus_dmamap_t    sc_cmdmap;
        bus_dma_segment_t sc_cmdseg[1];
        struct twe_ccb  sc_ccbs[TWE_MAXCMDS];
        twe_queue_head  sc_free_ccb;
        twe_queue_head  sc_ccbq;
        twe_queue_head  sc_ccb2q;
        twe_queue_head  sc_done_ccb;
        struct mutex    sc_ccb_mtx;
        struct scsi_iopool sc_iopool;

        struct timeout  sc_enqueue_tmo;

        struct scsi_iohandler sc_aen;

        struct {
                int     hd_present;
                int     hd_devtype;
                int     hd_lock;
                int     hd_size;
        } sc_hdr[TWE_MAX_UNITS];
};

/* XXX These have to become spinlocks in case of SMP */
#define TWE_LOCK(sc) splbio()
#define TWE_UNLOCK(sc, lock) splx(lock)
typedef int twe_lock_t;

int     twe_attach(struct twe_softc *);
int     twe_intr(void *);