static int
fw_write(struct cdev *dev, struct uio *uio, int ioflag)
{
int err = 0;
int s, slept = 0;
struct fw_drv1 *d;
struct fw_pkt *fp;
struct firewire_comm *fc;
struct fw_xferq *it;
if (DEV_FWMEM(dev))
return (physio(dev, uio, ioflag));
d = dev->si_drv1;
fc = d->fc;
it = d->it;
if (it == NULL)
return (fw_write_async(d, uio, ioflag));
if (it->buf == NULL)
return (EIO);
FW_GLOCK(fc);
isoloop:
if (it->stproc == NULL) {
it->stproc = STAILQ_FIRST(&it->stfree);
if (it->stproc != NULL) {
s = splfw();
STAILQ_REMOVE_HEAD(&it->stfree, link);
splx(s);
it->queued = 0;
} else if (slept == 0) {
slept = 1;
#if 0 /* XXX to avoid lock recursion */
err = fc->itx_enable(fc, it->dmach);
if (err)
goto out;
#endif
err = msleep(it, FW_GMTX(fc), FWPRI, "fw_write", hz);
if (err)
goto out;
goto isoloop;
} else {
err = EIO;
goto out;
}
}
FW_GUNLOCK(fc);
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) {
s = splfw();
STAILQ_INSERT_TAIL(&it->stvalid, it->stproc, link);
splx(s);
it->stproc = NULL;
err = fc->itx_enable(fc, it->dmach);
}
if (uio->uio_resid >= sizeof(struct fw_isohdr)) {
slept = 0;
FW_GLOCK(fc);
goto isoloop;
}
return err;
out:
FW_GUNLOCK(fc);
return err;
}
int
fw_write(dev_t dev, struct uio *uio, int ioflag)
{
struct firewire_softc *sc;
struct firewire_comm *fc;
struct fw_drv1 *d;
struct fw_pkt *fp;
struct fw_xferq *it;
int slept = 0, err = 0;
sc = device_lookup_private(&ieee1394if_cd, DEV2UNIT(dev));
if (sc == NULL)
return ENXIO;
if (DEV_FWMEM(dev))
return physio(fw_strategy, NULL, dev, ioflag, minphys, uio);
d = (struct fw_drv1 *)sc->si_drv1;
fc = d->fc;
it = d->it;
if (it == NULL)
return fw_write_async(d, uio, ioflag);
if (it->buf == NULL)
return EIO;
mutex_enter(&fc->fc_mtx);
isoloop:
if (it->stproc == NULL) {
it->stproc = STAILQ_FIRST(&it->stfree);
if (it->stproc != NULL) {
STAILQ_REMOVE_HEAD(&it->stfree, link);
it->queued = 0;
} else if (slept == 0) {
slept = 1;
#if 0 /* XXX to avoid lock recursion */
err = fc->itx_enable(fc, it->dmach);
if (err)
goto out;
#endif
mutex_exit(&fc->fc_mtx);
err = tsleep(it, FWPRI, "fw_write", hz);
mutex_enter(&fc->fc_mtx);
if (err)
goto out;
goto isoloop;
} else {
err = EIO;
goto out;
}
}
mutex_exit(&fc->fc_mtx);
fp = (struct fw_pkt *)fwdma_v_addr(it->buf,
it->stproc->poffset + it->queued);
err = uiomove((void *)fp, sizeof(struct fw_isohdr), uio);
if (err != 0)
return err;
err =
uiomove((void *)fp->mode.stream.payload, fp->mode.stream.len, uio);
it->queued++;
if (it->queued >= it->bnpacket) {
STAILQ_INSERT_TAIL(&it->stvalid, it->stproc, link);
it->stproc = NULL;
err = fc->itx_enable(fc, it->dmach);
}
if (uio->uio_resid >= sizeof(struct fw_isohdr)) {
slept = 0;
mutex_enter(&fc->fc_mtx);
goto isoloop;
}
return err;
out:
mutex_exit(&fc->fc_mtx);
return err;
}