/*
 * 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