/*
 * Copyright (c) 2003 Hidetoshi Shimokawa
 * Copyright (c) 1998-2002 Katsushi Kobayashi and Hidetoshi Shimokawa
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the acknowledgement as bellow:
 *
 *    This product includes software developed by K. Kobayashi and H. Shimokawa
 *
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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 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.
 * 
 * $FreeBSD: src/sys/dev/firewire/fwdev.c,v 1.36 2004/01/22 14:41:17 simokawa Exp $
 *
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/mbuf.h>
#include <sys/buf.h>

#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/event.h>

#include <sys/bus.h>
#include <sys/ctype.h>

#include <sys/thread2.h>

#include <bus/firewire/firewire.h>
#include <bus/firewire/firewirereg.h>
#include <bus/firewire/fwdma.h>
#include <bus/firewire/fwmem.h>
#include <bus/firewire/iec68113.h>

#define FWNODE_INVAL 0xffff

static  d_open_t        fw_open;
static  d_close_t       fw_close;
static  d_ioctl_t       fw_ioctl;
static  d_kqfilter_t    fw_kqfilter;
static  d_read_t        fw_read;        /* for Isochronous packet */
static  d_write_t       fw_write;
static  d_mmap_t        fw_mmap;
static  d_strategy_t    fw_strategy;

static void fwfilt_detach(struct knote *);
static int fwfilt_read(struct knote *, long);
static int fwfilt_write(struct knote *, long);

struct dev_ops firewire_ops = 
{
        { "fw", 0, D_MEM },
        .d_open =       fw_open,
        .d_close =      fw_close,
        .d_read =       fw_read,
        .d_write =      fw_write,
        .d_ioctl =      fw_ioctl,
        .d_kqfilter =   fw_kqfilter,
        .d_mmap =       fw_mmap,
        .d_strategy =   fw_strategy,
};

struct fw_drv1 {
        struct fw_xferq *ir;
        struct fw_xferq *it;
        struct fw_isobufreq bufreq;
};

static int
fwdev_allocbuf(struct firewire_comm *fc, struct fw_xferq *q,
        struct fw_bufspec *b)
{
        int i;

        if (q->flag & (FWXFERQ_RUNNING | FWXFERQ_EXTBUF))
                return(EBUSY);

        q->bulkxfer = (struct fw_bulkxfer *) kmalloc(
                sizeof(struct fw_bulkxfer) * b->nchunk,
                M_FW, M_WAITOK);

        b->psize = roundup2(b->psize, sizeof(u_int32_t));
        q->buf = fwdma_malloc_multiseg(fc, sizeof(u_int32_t),
                        b->psize, b->nchunk * b->npacket, BUS_DMA_WAITOK);

        if (q->buf == NULL) {
                kfree(q->bulkxfer, M_FW);
                q->bulkxfer = NULL;
                return(ENOMEM);
        }
        q->bnchunk = b->nchunk;
        q->bnpacket = b->npacket;
        q->psize = (b->psize + 3) & ~3;
        q->queued = 0;

        STAILQ_INIT(&q->stvalid);
        STAILQ_INIT(&q->stfree);
        STAILQ_INIT(&q->stdma);
        q->stproc = NULL;

        for(i = 0 ; i < q->bnchunk; i++){
                q->bulkxfer[i].poffset = i * q->bnpacket;
                q->bulkxfer[i].mbuf = NULL;
                STAILQ_INSERT_TAIL(&q->stfree, &q->bulkxfer[i], link);
        }

        q->flag &= ~FWXFERQ_MODEMASK;
        q->flag |= FWXFERQ_STREAM;
        q->flag |= FWXFERQ_EXTBUF;

        return (0);
}

static int
fwdev_freebuf(struct fw_xferq *q)
{
        if (q->flag & FWXFERQ_EXTBUF) {
                if (q->buf != NULL)
                        fwdma_free_multiseg(q->buf);
                q->buf = NULL;
                kfree(q->bulkxfer, M_FW);
                q->bulkxfer = NULL;
                q->flag &= ~FWXFERQ_EXTBUF;
                q->psize = 0;
                q->maxq = FWMAXQUEUE;
        }
        return (0);
}


static int
fw_open (struct dev_open_args *ap)
{
        cdev_t dev = ap->a_head.a_dev;
        int err = 0;

        if (DEV_FWMEM(dev))
                return fwmem_open(ap);

        if (dev->si_drv1 != NULL)
                return (EBUSY);

#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
        if ((dev->si_flags & SI_NAMED) == 0) {
                int unit = DEV2UNIT(dev);
                int sub = DEV2SUB(dev);

                make_dev(&firewire_ops, minor(dev),
                        UID_ROOT, GID_OPERATOR, 0660,
                        "fw%d.%d", unit, sub);
        }
#endif

        dev->si_drv1 = kmalloc(sizeof(struct fw_drv1), M_FW, M_WAITOK | M_ZERO);

        return err;
}

static int
fw_close (struct dev_close_args *ap)
{
        cdev_t dev = ap->a_head.a_dev;
        struct firewire_softc *sc;
        struct firewire_comm *fc;
        struct fw_drv1 *d;
        int unit = DEV2UNIT(dev);
        struct fw_xfer *xfer;
        struct fw_bind *fwb;
        int err = 0;

        if (DEV_FWMEM(dev))
                return fwmem_close(ap);

        sc = devclass_get_softc(firewire_devclass, unit);
        fc = sc->fc;
        d = (struct fw_drv1 *)dev->si_drv1;

        if (d->ir != NULL) {
                struct fw_xferq *ir = d->ir;

                if ((ir->flag & FWXFERQ_OPEN) == 0)
                        return (EINVAL);
                if (ir->flag & FWXFERQ_RUNNING) {
                        ir->flag &= ~FWXFERQ_RUNNING;
                        fc->irx_disable(fc, ir->dmach);
                }
                /* free extbuf */
                fwdev_freebuf(ir);
                /* drain receiving buffer */
                for (xfer = STAILQ_FIRST(&ir->q);
                        xfer != NULL; xfer = STAILQ_FIRST(&ir->q)) {
                        ir->queued --;
                        STAILQ_REMOVE_HEAD(&ir->q, link);

                        xfer->resp = 0;
                        fw_xfer_done(xfer);
                }
                /* remove binding */
                for (fwb = STAILQ_FIRST(&ir->binds); fwb != NULL;
                                fwb = STAILQ_FIRST(&ir->binds)) {
                        STAILQ_REMOVE(&fc->binds, fwb, fw_bind, fclist);
                        STAILQ_REMOVE_HEAD(&ir->binds, chlist);
                        kfree(fwb, M_FW);
                }
                ir->flag &= ~(FWXFERQ_OPEN |
                        FWXFERQ_MODEMASK | FWXFERQ_CHTAGMASK);
                d->ir = NULL;

        }
        if (d->it != NULL) {
                struct fw_xferq *it = d->it;

                if ((it->flag & FWXFERQ_OPEN) == 0)
                        return (EINVAL);
                if (it->flag & FWXFERQ_RUNNING) {
                        it->flag &= ~FWXFERQ_RUNNING;
                        fc->itx_disable(fc, it->dmach);
                }
                /* free extbuf */
                fwdev_freebuf(it);
                it->flag &= ~(FWXFERQ_OPEN |
                        FWXFERQ_MODEMASK | FWXFERQ_CHTAGMASK);
                d->it = NULL;
        }
        kfree(dev->si_drv1, M_FW);
        dev->si_drv1 = NULL;

        return err;
}

/*
 * read request.
 */
static int
fw_read (struct dev_read_args *ap)
{
        cdev_t dev = ap->a_head.a_dev;
        struct uio *uio = ap->a_uio;
        struct firewire_softc *sc;
        struct fw_xferq *ir;
        struct fw_xfer *xfer;
        int err = 0, slept = 0;
        int unit = DEV2UNIT(dev);
        struct fw_pkt *fp;

        if (DEV_FWMEM(dev))
                return physread(ap);

        sc = devclass_get_softc(firewire_devclass, unit);

        ir = ((struct fw_drv1 *)dev->si_drv1)->ir;
        if (ir == NULL || ir->buf == NULL)
                return (EIO);

readloop:
        xfer = STAILQ_FIRST(&ir->q);
        if (ir->stproc == NULL) {
                /* iso bulkxfer */
                ir->stproc = STAILQ_FIRST(&ir->stvalid);
                if (ir->stproc != NULL) {
                        crit_enter();
                        STAILQ_REMOVE_HEAD(&ir->stvalid, link);
                        crit_exit();
                        ir->queued = 0;
                }
        }
        if (xfer == NULL && ir->stproc == NULL) {
                /* no data avaliable */
                if (slept == 0) {
                        slept = 1;
                        ir->flag |= FWXFERQ_WAKEUP;
                        err = tsleep(ir, FWPRI, "fw_read", hz);
                        ir->flag &= ~FWXFERQ_WAKEUP;
                        if (err == 0)
                                goto readloop;
                } else if (slept == 1)
                        err = EIO;
                return err;
        } else if(xfer != NULL) {
#if 0 /* XXX broken */
                /* per packet mode or FWACT_CH bind?*/
                crit_enter();
                ir->queued --;
                STAILQ_REMOVE_HEAD(&ir->q, link);
                crit_exit();
                fp = &xfer->recv.hdr;
                if (sc->fc->irx_post != NULL)
                        sc->fc->irx_post(sc->fc, fp->mode.ld);
                err = uiomove((void *)fp, 1 /* XXX header size */, uio);
                /* XXX copy payload too */
                /* XXX we should recycle this xfer */
#endif
                fw_xfer_free( xfer);
        } else if(ir->stproc != NULL) {
                /* iso bulkxfer */
                fp = (struct fw_pkt *)fwdma_v_addr(ir->buf, 
                                ir->stproc->poffset + ir->queued);
                if(sc->fc->irx_post != NULL)
                        sc->fc->irx_post(sc->fc, fp->mode.ld);
                if(fp->mode.stream.len == 0){
                        err = EIO;
                        return err;
                }
                err = uiomove((caddr_t)fp,
                        fp->mode.stream.len + sizeof(u_int32_t), uio);
                ir->queued ++;
                if(ir->queued >= ir->bnpacket){
                        crit_enter();
                        STAILQ_INSERT_TAIL(&ir->stfree, ir->stproc, link);
                        crit_exit();
                        sc->fc->irx_enable(sc->fc, ir->dmach);
                        ir->stproc = NULL;
                }
                if (uio->uio_resid >= ir->psize) {
                        slept = -1;
                        goto readloop;
                }
        }
        return err;
}

static int
fw_write (struct dev_write_args *ap)
{
        cdev_t dev = ap->a_head.a_dev;
        struct uio *uio = ap->a_uio;
        int err = 0;
        struct firewire_softc *sc;
        int unit = DEV2UNIT(dev);
        int slept = 0;
        struct fw_pkt *fp;
        struct fw_xferq *it;

        if (DEV_FWMEM(dev))
                return physwrite(ap);

        sc = devclass_get_softc(firewire_devclass, unit);
        it = ((struct fw_drv1 *)dev->si_drv1)->it;
        if (it == NULL || it->buf == NULL)
                return (EIO);
isoloop:
        if (it->stproc == NULL) {
                it->stproc = STAILQ_FIRST(&it->stfree);
                if (it->stproc != NULL) {
                        crit_enter();
                        STAILQ_REMOVE_HEAD(&it->stfree, link);
                        crit_exit();
                        it->queued = 0;
                } else if (slept == 0) {
                        slept = 1;
                        err = sc->fc->itx_enable(sc->fc, it->dmach);
                        if (err)
                                return err;
                        err = tsleep(it, FWPRI, "fw_write", hz);
                        if (err)
                                return err;
                        goto isoloop;
                } else {
                        err = EIO;
                        return err;
                }
        }
        fp = (struct fw_pkt *)fwdma_v_addr(it->buf,
                        it->stproc->poffset + it->queued);
        err = uiomove((caddr_t)fp, sizeof(struct fw_isohdr), uio);
        err = uiomove((caddr_t)fp->mode.stream.payload,
                                fp->mode.stream.len, uio);
        it->queued ++;
        if (it->queued >= it->bnpacket) {
                crit_enter();
                STAILQ_INSERT_TAIL(&it->stvalid, it->stproc, link);
                crit_exit();
                it->stproc = NULL;
                err = sc->fc->itx_enable(sc->fc, it->dmach);
        }
        if (uio->uio_resid >= sizeof(struct fw_isohdr)) {
                slept = 0;
                goto isoloop;
        }
        return err;
}
/*
 * ioctl support.
 */
static int
fw_ioctl (struct dev_ioctl_args *ap)
{
        cdev_t dev = ap->a_head.a_dev;
        struct firewire_softc *sc;
        struct firewire_comm *fc;
        struct fw_drv1 *d;
        int unit = DEV2UNIT(dev);
        int i, len, err = 0;
        struct fw_device *fwdev;
        struct fw_bind *fwb;
        struct fw_xferq *ir, *it;
        struct fw_xfer *xfer;
        struct fw_pkt *fp;
        struct fw_devinfo *devinfo;
        void *ptr;

        struct fw_devlstreq *fwdevlst = (struct fw_devlstreq *)ap->a_data;
        struct fw_asyreq *asyreq = (struct fw_asyreq *)ap->a_data;
        struct fw_isochreq *ichreq = (struct fw_isochreq *)ap->a_data;
        struct fw_isobufreq *ibufreq = (struct fw_isobufreq *)ap->a_data;
        struct fw_asybindreq *bindreq = (struct fw_asybindreq *)ap->a_data;
        struct fw_crom_buf *crom_buf = (struct fw_crom_buf *)ap->a_data;

        if (DEV_FWMEM(dev))
                return fwmem_ioctl(ap);

        if (!ap->a_data)
                return(EINVAL);

        sc = devclass_get_softc(firewire_devclass, unit);
        fc = sc->fc;
        d = (struct fw_drv1 *)dev->si_drv1;
        ir = d->ir;
        it = d->it;

        switch (ap->a_cmd) {
        case FW_STSTREAM:
                if (it == NULL) {
                        for (i = 0; i < fc->nisodma; i ++) {
                                it = fc->it[i];
                                if ((it->flag & FWXFERQ_OPEN) == 0)
                                         break;
                        }       
                        if (i >= fc->nisodma) {
                                err = EBUSY;
                                break;
                        }
                        err = fwdev_allocbuf(fc, it, &d->bufreq.tx);
                        if (err)
                                break;
                        it->flag |=  FWXFERQ_OPEN;
                }
                it->flag &= ~0xff;
                it->flag |= (0x3f & ichreq->ch);
                it->flag |= ((0x3 & ichreq->tag) << 6);
                d->it = it;
                break;
        case FW_GTSTREAM:
                if (it != NULL) {
                        ichreq->ch = it->flag & 0x3f;
                        ichreq->tag = it->flag >> 2 & 0x3;
                } else
                        err = EINVAL;
                break;
        case FW_SRSTREAM:
                if (ir == NULL) {
                        for (i = 0; i < fc->nisodma; i ++) {
                                ir = fc->ir[i];
                                if ((ir->flag & FWXFERQ_OPEN) == 0)
                                        break;
                        }       
                        if (i >= fc->nisodma) {
                                err = EBUSY;
                                break;
                        }
                        err = fwdev_allocbuf(fc, ir, &d->bufreq.rx);
                        if (err)
                                break;
                        ir->flag |=  FWXFERQ_OPEN;
                }
                ir->flag &= ~0xff;
                ir->flag |= (0x3f & ichreq->ch);
                ir->flag |= ((0x3 & ichreq->tag) << 6);
                d->ir = ir;
                err = fc->irx_enable(fc, ir->dmach);
                break;
        case FW_GRSTREAM:
                if (d->ir != NULL) {
                        ichreq->ch = ir->flag & 0x3f;
                        ichreq->tag = ir->flag >> 2 & 0x3;
                } else
                        err = EINVAL;
                break;
        case FW_SSTBUF:
                bcopy(ibufreq, &d->bufreq, sizeof(d->bufreq));
                break;
        case FW_GSTBUF:
                bzero(&ibufreq->rx, sizeof(ibufreq->rx));
                if (ir != NULL) {
                        ibufreq->rx.nchunk = ir->bnchunk;
                        ibufreq->rx.npacket = ir->bnpacket;
                        ibufreq->rx.psize = ir->psize;
                }
                bzero(&ibufreq->tx, sizeof(ibufreq->tx));
                if (it != NULL) {
                        ibufreq->tx.nchunk = it->bnchunk;
                        ibufreq->tx.npacket = it->bnpacket;
                        ibufreq->tx.psize = it->psize;
                }
                break;
        case FW_ASYREQ:
        {
                struct tcode_info *tinfo;
                int pay_len = 0;

                fp = &asyreq->pkt;
                tinfo = &sc->fc->tcode[fp->mode.hdr.tcode];

                if ((tinfo->flag & FWTI_BLOCK_ASY) != 0)
                        pay_len = MAX(0, asyreq->req.len - tinfo->hdr_len);

                xfer = fw_xfer_alloc_buf(M_FWXFER, pay_len, PAGE_SIZE/*XXX*/);
                if (xfer == NULL)
                        return (ENOMEM);

                switch (asyreq->req.type) {
                case FWASREQNODE:
                        break;
                case FWASREQEUI:
                        fwdev = fw_noderesolve_eui64(sc->fc,
                                                &asyreq->req.dst.eui);
                        if (fwdev == NULL) {
                                device_printf(sc->fc->bdev,
                                        "cannot find node\n");
                                err = EINVAL;
                                goto out;
                        }
                        fp->mode.hdr.dst = FWLOCALBUS | fwdev->dst;
                        break;
                case FWASRESTL:
                        /* XXX what's this? */
                        break;
                case FWASREQSTREAM:
                        /* nothing to do */
                        break;
                }

                bcopy(fp, (void *)&xfer->send.hdr, tinfo->hdr_len);
                if (pay_len > 0)
                        bcopy((char *)fp + tinfo->hdr_len,
                            (void *)&xfer->send.payload, pay_len);
                xfer->send.spd = asyreq->req.sped;
                xfer->act.hand = fw_asy_callback;

                if ((err = fw_asyreq(sc->fc, -1, xfer)) != 0)
                        goto out;
                if ((err = tsleep(xfer, FWPRI, "asyreq", hz)) != 0)
                        goto out;
                if (xfer->resp != 0) {
                        err = EIO;
                        goto out;
                }
                if ((tinfo->flag & FWTI_TLABEL) == 0)
                        goto out;

                /* copy response */
                tinfo = &sc->fc->tcode[xfer->recv.hdr.mode.hdr.tcode];
                if (asyreq->req.len >= xfer->recv.pay_len + tinfo->hdr_len)
                        asyreq->req.len = xfer->recv.pay_len;
                else
                        err = EINVAL;
                bcopy(&xfer->recv.hdr, fp, tinfo->hdr_len);
                bcopy(xfer->recv.payload, (char *)fp + tinfo->hdr_len,
                    MAX(0, asyreq->req.len - tinfo->hdr_len));
out:
                fw_xfer_free_buf(xfer);
                break;
        }
        case FW_IBUSRST:
                sc->fc->ibr(sc->fc);
                break;
        case FW_CBINDADDR:
                fwb = fw_bindlookup(sc->fc,
                                bindreq->start.hi, bindreq->start.lo);
                if(fwb == NULL){
                        err = EINVAL;
                        break;
                }
                STAILQ_REMOVE(&sc->fc->binds, fwb, fw_bind, fclist);
                STAILQ_REMOVE(&ir->binds, fwb, fw_bind, chlist);
                kfree(fwb, M_FW);
                break;
        case FW_SBINDADDR:
                if(bindreq->len <= 0 ){
                        err = EINVAL;
                        break;
                }
                if(bindreq->start.hi > 0xffff ){
                        err = EINVAL;
                        break;
                }
                fwb = kmalloc(sizeof (struct fw_bind), M_FW, M_WAITOK);
                fwb->start = ((u_int64_t)bindreq->start.hi << 32) |
                    bindreq->start.lo;
                fwb->end = fwb->start +  bindreq->len;
                /* XXX */
                fwb->sub = ir->dmach;
                fwb->act_type = FWACT_CH;

                /* XXX alloc buf */
                xfer = fw_xfer_alloc(M_FWXFER);
                if(xfer == NULL){
                        kfree(fwb, M_FW);
                        return (ENOMEM);
                }
                xfer->fc = sc->fc;

                crit_enter();
                /* XXX broken. need multiple xfer */
                STAILQ_INIT(&fwb->xferlist);
                STAILQ_INSERT_TAIL(&fwb->xferlist, xfer, link);
                crit_exit();
                err = fw_bindadd(sc->fc, fwb);
                break;
        case FW_GDEVLST:
                i = len = 1;
                /* myself */
                devinfo = &fwdevlst->dev[0];
                devinfo->dst = sc->fc->nodeid;
                devinfo->status = 0;    /* XXX */
                devinfo->eui.hi = sc->fc->eui.hi;
                devinfo->eui.lo = sc->fc->eui.lo;
                STAILQ_FOREACH(fwdev, &sc->fc->devices, link) {
                        if(len < FW_MAX_DEVLST){
                                devinfo = &fwdevlst->dev[len++];
                                devinfo->dst = fwdev->dst;
                                devinfo->status = 
                                        (fwdev->status == FWDEVINVAL)?0:1;
                                devinfo->eui.hi = fwdev->eui.hi;
                                devinfo->eui.lo = fwdev->eui.lo;
                        }
                        i++;
                }
                fwdevlst->n = i;
                fwdevlst->info_len = len;
                break;
        case FW_GTPMAP:
                bcopy(sc->fc->topology_map, ap->a_data,
                                (sc->fc->topology_map->crc_len + 1) * 4);
                break;
        case FW_GCROM:
                STAILQ_FOREACH(fwdev, &sc->fc->devices, link)
                        if (FW_EUI64_EQUAL(fwdev->eui, crom_buf->eui))
                                break;
                if (fwdev == NULL) {
                        if (!FW_EUI64_EQUAL(sc->fc->eui, crom_buf->eui)) {
                                err = FWNODE_INVAL;
                                break;
                        }
                        /* myself */
                        ptr = kmalloc(CROMSIZE, M_FW, M_WAITOK);
                        len = CROMSIZE;
                        for (i = 0; i < CROMSIZE/4; i++)
                                ((u_int32_t *)ptr)[i]
                                        = ntohl(sc->fc->config_rom[i]);
                } else {
                        /* found */
                        ptr = (void *)&fwdev->csrrom[0];
                        if (fwdev->rommax < CSRROMOFF)
                                len = 0;
                        else
                                len = fwdev->rommax - CSRROMOFF + 4;
                }
                if (crom_buf->len < len && crom_buf->len >= 0)
                        len = crom_buf->len;
                else
                        crom_buf->len = len;
                err = copyout(ptr, crom_buf->ptr, len);
                if (fwdev == NULL)
                        /* myself */
                        kfree(ptr, M_FW);
                break;
        default:
                sc->fc->ioctl(ap);
                break;
        }
        return err;
}

static struct filterops fw_read_filterops =
        { FILTEROP_ISFD, NULL, fwfilt_detach, fwfilt_read };
static struct filterops fw_write_filterops =
        { FILTEROP_ISFD, NULL, fwfilt_detach, fwfilt_write };

static int
fw_kqfilter(struct dev_kqfilter_args *ap)
{
        cdev_t dev = ap->a_head.a_dev;
        struct fw_xferq *ir;
        struct knote *kn = ap->a_kn;
        struct klist *klist;

        /*
         * XXX Implement filters for mem?
         */
        if (DEV_FWMEM(dev)) {
                ap->a_result = EOPNOTSUPP;
                return (0);
        }

        ir = ((struct fw_drv1 *)dev->si_drv1)->ir;

        ap->a_result = 0;

        switch (kn->kn_filter) {
        case EVFILT_READ:
                kn->kn_fop = &fw_read_filterops;
                kn->kn_hook = (caddr_t)ir;
                break;
        case EVFILT_WRITE:
                kn->kn_fop = &fw_write_filterops;
                kn->kn_hook = (caddr_t)ir;
                break;
        default:
                ap->a_result = EOPNOTSUPP;
                return (0);
        }

        klist = &ir->rkq.ki_note;
        knote_insert(klist, kn);

        return (0);
}

static void
fwfilt_detach(struct knote *kn)
{
        struct fw_xferq *ir = (struct fw_xferq *)kn->kn_hook;
        struct klist *klist = &ir->rkq.ki_note;

        knote_remove(klist, kn);
}

static int
fwfilt_read(struct knote *kn, long hint)
{
        struct fw_xferq *ir = (struct fw_xferq *)kn->kn_hook;
        int ready = 0;

        if (STAILQ_FIRST(&ir->q) != NULL)
                ready = 1;

        return (ready);
}

static int
fwfilt_write(struct knote *kn, long hint)
{
        /* XXX should be fixed */
        return (1);
}

static int
fw_mmap (struct dev_mmap_args *ap)
{  
        cdev_t dev = ap->a_head.a_dev;

        if (DEV_FWMEM(dev))
                return fwmem_mmap(ap);

        return EINVAL;
}

static int
fw_strategy(struct dev_strategy_args *ap)
{
        cdev_t dev = ap->a_head.a_dev;
        struct bio *bio = ap->a_bio;
        struct buf *bp = bio->bio_buf;

        if (DEV_FWMEM(dev)) {
                fwmem_strategy(ap);
                return(0);
        }
        bp->b_error = EOPNOTSUPP;
        bp->b_flags |= B_ERROR;
        bp->b_resid = bp->b_bcount;
        biodone(bio);
        return(0);
}

int
fwdev_makedev(struct firewire_softc *sc)
{
        /*HELPME dev_ops_add(&firewire_ops, FW_UNITMASK, FW_UNIT(unit));*/
        return(0);
}

int
fwdev_destroydev(struct firewire_softc *sc)
{
        int unit;

        unit = device_get_unit(sc->fc->bdev);
        dev_ops_remove_minor(&firewire_ops, /*FW_UNITMASK, */FW_UNIT(unit));
        return(0);
}

#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
#define NDEVTYPE 2
void
fwdev_clone(void *arg, char *name, int namelen, cdev_t *dev)
{
        struct firewire_softc *sc;
        char *devnames[NDEVTYPE] = {"fw", "fwmem"};
        char *subp = NULL;
        int devflag[NDEVTYPE] = {0, FWMEM_FLAG};
        int i, unit = 0, sub = 0;

        if (*dev != NULL)
                return;

        for (i = 0; i < NDEVTYPE; i++)
                if (dev_stdclone(name, &subp, devnames[i], &unit) == 2)
                        goto found;
        /* not match */
        return;
found:

        if (subp == NULL || *subp++ != '.')
                return;

        /* /dev/fwU.S */
        while (isdigit(*subp)) {
                sub *= 10;
                sub += *subp++ - '0';
        }
        if (*subp != '\0')
                return;

        sc = devclass_get_softc(firewire_devclass, unit);
        if (sc == NULL)
                return;
        *dev = make_dev(&firewire_ops, MAKEMINOR(devflag[i], unit, sub),
                       UID_ROOT, GID_OPERATOR, 0660,
                       "%s%d.%d", devnames[i], unit, sub);
        (*dev)->si_flags |= SI_CHEAPCLONE;
        dev_depends(sc->dev, *dev);
        return;
}
#endif