Add locking to mcd(4) and mark MPSAFE.
- Actually use existing per-softc mutex. - Use mutex in cdev routines and remove D_NEEDGIANT. - Use callout(9) instead of timeout(9). - Don't check for impossible conditions (e.g. MCDINIT being clear). - Remove critical_enter/exit when sending a PIO command. - Use bus_*() instead of bus_space_*(). Tested by: no one
This commit is contained in:
John Baldwin
parent
2a0db815fe
commit
23c31a3c5d
@ -128,7 +128,7 @@ static void hsg2msf(int hsg, bcd_t *msf);
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static int msf2hsg(bcd_t *msf, int relative);
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static int mcd_volinfo(struct mcd_softc *);
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static int mcd_waitrdy(struct mcd_softc *,int dly);
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static timeout_t mcd_timeout;
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static void mcd_timeout(void *arg);
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static void mcd_doread(struct mcd_softc *, int state, struct mcd_mbx *mbxin);
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static void mcd_soft_reset(struct mcd_softc *);
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static int mcd_hard_reset(struct mcd_softc *);
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@ -168,7 +168,7 @@ static struct cdevsw mcd_cdevsw = {
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.d_ioctl = mcdioctl,
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.d_strategy = mcdstrategy,
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.d_name = "mcd",
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.d_flags = D_DISK | D_NEEDGIANT,
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.d_flags = D_DISK,
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};
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#define MCD_RETRYS 5
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@ -193,6 +193,7 @@ mcd_attach(struct mcd_softc *sc)
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unit = device_get_unit(sc->dev);
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MCD_LOCK(sc);
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sc->data.flags |= MCDINIT;
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mcd_soft_reset(sc);
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bioq_init(&sc->data.head);
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@ -201,11 +202,13 @@ mcd_attach(struct mcd_softc *sc)
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/* wire controller for interrupts and dma */
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mcd_configure(sc);
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#endif
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MCD_UNLOCK(sc);
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/* name filled in probe */
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sc->mcd_dev_t = make_dev(&mcd_cdevsw, 8 * unit,
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UID_ROOT, GID_OPERATOR, 0640, "mcd%d", unit);
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sc->mcd_dev_t->si_drv1 = (void *)sc;
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callout_init_mtx(&sc->timer, &sc->mtx, 0);
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return (0);
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}
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@ -218,41 +221,49 @@ mcdopen(struct cdev *dev, int flags, int fmt, struct thread *td)
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sc = (struct mcd_softc *)dev->si_drv1;
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/* not initialized*/
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if (!(sc->data.flags & MCDINIT))
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return (ENXIO);
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/* invalidated in the meantime? mark all open part's invalid */
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if (!(sc->data.flags & MCDVALID) && sc->data.openflags)
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MCD_LOCK(sc);
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if (!(sc->data.flags & MCDVALID) && sc->data.openflags) {
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MCD_UNLOCK(sc);
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return (ENXIO);
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}
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if (mcd_getstat(sc, 1) == -1)
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if (mcd_getstat(sc, 1) == -1) {
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MCD_UNLOCK(sc);
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return (EIO);
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}
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if ( (sc->data.status & (MCDDSKCHNG|MCDDOOROPEN))
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|| !(sc->data.status & MCDDSKIN))
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for (retry = 0; retry < DISK_SENSE_SECS * WAIT_FRAC; retry++) {
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(void) tsleep((caddr_t)sc, PSOCK | PCATCH, "mcdsn1", hz/WAIT_FRAC);
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if ((r = mcd_getstat(sc, 1)) == -1)
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(void) mtx_sleep(sc, &sc->mtx, PSOCK | PCATCH,
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"mcdsn1", hz/WAIT_FRAC);
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if ((r = mcd_getstat(sc, 1)) == -1) {
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MCD_UNLOCK(sc);
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return (EIO);
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}
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if (r != -2)
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break;
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}
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if (sc->data.status & MCDDOOROPEN) {
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MCD_UNLOCK(sc);
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device_printf(sc->dev, "door is open\n");
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return (ENXIO);
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}
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if (!(sc->data.status & MCDDSKIN)) {
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MCD_UNLOCK(sc);
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device_printf(sc->dev, "no CD inside\n");
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return (ENXIO);
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}
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if (sc->data.status & MCDDSKCHNG) {
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MCD_UNLOCK(sc);
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device_printf(sc->dev, "CD not sensed\n");
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return (ENXIO);
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}
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if (mcd_size(dev) < 0) {
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MCD_UNLOCK(sc);
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device_printf(sc->dev, "failed to get disk size\n");
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return (ENXIO);
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}
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@ -262,10 +273,14 @@ mcdopen(struct cdev *dev, int flags, int fmt, struct thread *td)
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sc->data.flags |= MCDVALID;
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(void) mcd_lock_door(sc, MCD_LK_LOCK);
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if (!(sc->data.flags & MCDVALID))
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if (!(sc->data.flags & MCDVALID)) {
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MCD_UNLOCK(sc);
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return (ENXIO);
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}
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return mcd_read_toc(sc);
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r = mcd_read_toc(sc);
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MCD_UNLOCK(sc);
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return (r);
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}
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static int
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@ -275,12 +290,13 @@ mcdclose(struct cdev *dev, int flags, int fmt, struct thread *td)
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sc = (struct mcd_softc *)dev->si_drv1;
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if (!(sc->data.flags & MCDINIT) || !sc->data.openflags)
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return (ENXIO);
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MCD_LOCK(sc);
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KASSERT(sc->data.openflags, ("device not open"));
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(void) mcd_lock_door(sc, MCD_LK_UNLOCK);
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sc->data.openflags = 0;
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sc->data.partflags &= ~MCDREADRAW;
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MCD_UNLOCK(sc);
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return (0);
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}
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@ -293,6 +309,7 @@ mcdstrategy(struct bio *bp)
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sc = (struct mcd_softc *)bp->bio_dev->si_drv1;
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/* if device invalidated (e.g. media change, door open), error */
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MCD_LOCK(sc);
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if (!(sc->data.flags & MCDVALID)) {
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device_printf(sc->dev, "media changed\n");
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bp->bio_error = EIO;
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@ -321,11 +338,13 @@ mcdstrategy(struct bio *bp)
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/* now check whether we can perform processing */
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mcd_start(sc);
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MCD_UNLOCK(sc);
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return;
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bad:
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bp->bio_flags |= BIO_ERROR;
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done:
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MCD_UNLOCK(sc);
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bp->bio_resid = bp->bio_bcount;
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biodone(bp);
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return;
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@ -336,6 +355,7 @@ mcd_start(struct mcd_softc *sc)
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{
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struct bio *bp;
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MCD_ASSERT_LOCKED(sc);
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if (sc->data.flags & MCDMBXBSY) {
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return;
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}
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@ -365,8 +385,11 @@ mcdioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, struct thread *t
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sc = (struct mcd_softc *)dev->si_drv1;
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if (mcd_getstat(sc, 1) == -1) /* detect disk change too */
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MCD_LOCK(sc);
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if (mcd_getstat(sc, 1) == -1) { /* detect disk change too */
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MCD_UNLOCK(sc);
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return (EIO);
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}
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MCD_TRACE("ioctl called 0x%lx\n", cmd);
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switch (cmd) {
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@ -378,83 +401,114 @@ MCD_TRACE("ioctl called 0x%lx\n", cmd);
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case CDIOCSETMUTE:
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case CDIOCSETLEFT:
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case CDIOCSETRIGHT:
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MCD_UNLOCK(sc);
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return (EINVAL);
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case CDIOCEJECT:
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return mcd_eject(sc);
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r = mcd_eject(sc);
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MCD_UNLOCK(sc);
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return (r);
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case CDIOCSETDEBUG:
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sc->data.debug = 1;
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MCD_UNLOCK(sc);
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return (0);
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case CDIOCCLRDEBUG:
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sc->data.debug = 0;
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MCD_UNLOCK(sc);
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return (0);
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case CDIOCRESET:
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return mcd_hard_reset(sc);
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r = mcd_hard_reset(sc);
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MCD_UNLOCK(sc);
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return (r);
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case CDIOCALLOW:
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return mcd_lock_door(sc, MCD_LK_UNLOCK);
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r = mcd_lock_door(sc, MCD_LK_UNLOCK);
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MCD_UNLOCK(sc);
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return (r);
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case CDIOCPREVENT:
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return mcd_lock_door(sc, MCD_LK_LOCK);
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r = mcd_lock_door(sc, MCD_LK_LOCK);
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MCD_UNLOCK(sc);
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return (r);
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case CDIOCCLOSE:
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return mcd_inject(sc);
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r = mcd_inject(sc);
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MCD_UNLOCK(sc);
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return (r);
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}
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if (!(sc->data.flags & MCDVALID)) {
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if ( (sc->data.status & (MCDDSKCHNG|MCDDOOROPEN))
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|| !(sc->data.status & MCDDSKIN))
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for (retry = 0; retry < DISK_SENSE_SECS * WAIT_FRAC; retry++) {
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(void) tsleep((caddr_t)sc, PSOCK | PCATCH, "mcdsn2", hz/WAIT_FRAC);
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if ((r = mcd_getstat(sc, 1)) == -1)
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(void) mtx_sleep(sc, &sc->mtx, PSOCK | PCATCH,
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"mcdsn2", hz/WAIT_FRAC);
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if ((r = mcd_getstat(sc, 1)) == -1) {
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MCD_UNLOCK(sc);
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return (EIO);
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}
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if (r != -2)
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break;
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}
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if ( (sc->data.status & (MCDDOOROPEN|MCDDSKCHNG))
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|| !(sc->data.status & MCDDSKIN)
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|| mcd_size(dev) < 0
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)
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) {
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MCD_UNLOCK(sc);
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return (ENXIO);
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}
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sc->data.flags |= MCDVALID;
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sc->data.partflags |= MCDREADRAW;
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(void) mcd_lock_door(sc, MCD_LK_LOCK);
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if (!(sc->data.flags & MCDVALID))
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if (!(sc->data.flags & MCDVALID)) {
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MCD_UNLOCK(sc);
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return (ENXIO);
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}
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}
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switch (cmd) {
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case DIOCGMEDIASIZE:
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*(off_t *)addr = (off_t)sc->data.disksize * sc->data.blksize;
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return (0);
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r = 0;
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break;
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case DIOCGSECTORSIZE:
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*(u_int *)addr = sc->data.blksize;
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return (0);
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r = 0;
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break;
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case CDIOCPLAYTRACKS:
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return mcd_playtracks(sc, (struct ioc_play_track *) addr);
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r = mcd_playtracks(sc, (struct ioc_play_track *) addr);
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break;
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case CDIOCPLAYBLOCKS:
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return mcd_playblocks(sc, (struct ioc_play_blocks *) addr);
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r = mcd_playblocks(sc, (struct ioc_play_blocks *) addr);
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break;
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case CDIOCPLAYMSF:
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return mcd_playmsf(sc, (struct ioc_play_msf *) addr);
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r = mcd_playmsf(sc, (struct ioc_play_msf *) addr);
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break;
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case CDIOCREADSUBCHANNEL_SYSSPACE:
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return mcd_subchan(sc, (struct ioc_read_subchannel *) addr, 1);
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case CDIOCREADSUBCHANNEL:
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return mcd_subchan(sc, (struct ioc_read_subchannel *) addr, 0);
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case CDIOREADTOCHEADER:
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return mcd_toc_header(sc, (struct ioc_toc_header *) addr);
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r = mcd_toc_header(sc, (struct ioc_toc_header *) addr);
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break;
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case CDIOREADTOCENTRYS:
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return mcd_toc_entrys(sc, (struct ioc_read_toc_entry *) addr);
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case CDIOCRESUME:
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return mcd_resume(sc);
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r = mcd_resume(sc);
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break;
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case CDIOCPAUSE:
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return mcd_pause(sc);
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r = mcd_pause(sc);
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break;
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case CDIOCSTART:
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if (mcd_setmode(sc, MCD_MD_COOKED) != 0)
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return (EIO);
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return (0);
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r = EIO;
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else
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r = 0;
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break;
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case CDIOCSTOP:
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return mcd_stop(sc);
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r = mcd_stop(sc);
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break;
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default:
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return (ENOTTY);
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r = ENOTTY;
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}
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/*NOTREACHED*/
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MCD_UNLOCK(sc);
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return (r);
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}
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static int
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@ -762,6 +816,7 @@ mcd_timeout(void *arg)
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sc = (struct mcd_softc *)arg;
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MCD_ASSERT_LOCKED(sc);
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mcd_doread(sc, sc->ch_state, sc->ch_mbxsave);
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}
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@ -775,6 +830,7 @@ mcd_doread(struct mcd_softc *sc, int state, struct mcd_mbx *mbxin)
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int blknum;
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caddr_t addr;
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MCD_ASSERT_LOCKED(sc);
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mbx = (state!=MCD_S_BEGIN) ? sc->ch_mbxsave : mbxin;
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bp = mbx->bp;
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@ -789,15 +845,16 @@ retry_status:
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MCD_WRITE(sc, MCD_REG_COMMAND, MCD_CMDGETSTAT);
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mbx->count = RDELAY_WAITSTAT;
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sc->ch_state = MCD_S_WAITSTAT;
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sc->ch = timeout(mcd_timeout, (caddr_t)sc, hz/100); /* XXX */
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callout_reset(&sc->timer, hz/100, mcd_timeout, sc); /* XXX */
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return;
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case MCD_S_WAITSTAT:
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sc->ch_state = MCD_S_WAITSTAT;
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untimeout(mcd_timeout,(caddr_t)sc, sc->ch);
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callout_stop(&sc->timer);
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if (mbx->count-- >= 0) {
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if (MCD_READ(sc, MCD_FLAGS) & MFL_STATUS_NOT_AVAIL) {
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sc->ch_state = MCD_S_WAITSTAT;
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timeout(mcd_timeout, (caddr_t)sc, hz/100); /* XXX */
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callout_reset(&sc->timer, hz/100,
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mcd_timeout, sc); /* XXX */
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return;
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}
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sc->data.status = MCD_READ(sc, MCD_REG_STATUS) & 0xFF;
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@ -834,7 +891,7 @@ retry_mode:
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MCD_WRITE(sc, MCD_REG_COMMAND, rm);
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sc->ch_state = MCD_S_WAITMODE;
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sc->ch = timeout(mcd_timeout, (caddr_t)sc, hz/100); /* XXX */
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callout_reset(&sc->timer, hz / 100, mcd_timeout, sc); /* XXX */
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return;
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} else {
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device_printf(sc->dev, "timeout getstatus\n");
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@ -843,14 +900,14 @@ retry_mode:
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case MCD_S_WAITMODE:
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sc->ch_state = MCD_S_WAITMODE;
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untimeout(mcd_timeout, (caddr_t)sc, sc->ch);
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callout_stop(&sc->timer);
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if (mbx->count-- < 0) {
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device_printf(sc->dev, "timeout set mode\n");
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goto readerr;
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}
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if (MCD_READ(sc, MCD_FLAGS) & MFL_STATUS_NOT_AVAIL) {
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sc->ch_state = MCD_S_WAITMODE;
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sc->ch = timeout(mcd_timeout, (caddr_t)sc, hz/100);
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callout_reset(&sc->timer, hz / 100, mcd_timeout, sc);
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return;
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}
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sc->data.status = MCD_READ(sc, MCD_REG_STATUS) & 0xFF;
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@ -878,7 +935,6 @@ nextblock:
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hsg2msf(blknum,rbuf.start_msf);
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retry_read:
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/* send the read command */
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critical_enter();
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MCD_WRITE(sc, MCD_REG_COMMAND, sc->data.read_command);
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MCD_WRITE(sc, MCD_REG_COMMAND, rbuf.start_msf[0]);
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MCD_WRITE(sc, MCD_REG_COMMAND, rbuf.start_msf[1]);
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@ -886,7 +942,6 @@ retry_read:
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MCD_WRITE(sc, MCD_REG_COMMAND, 0);
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MCD_WRITE(sc, MCD_REG_COMMAND, 0);
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MCD_WRITE(sc, MCD_REG_COMMAND, 1);
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critical_exit();
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/* Spin briefly (<= 2ms) to avoid missing next block */
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for (i = 0; i < 20; i++) {
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@ -898,11 +953,11 @@ retry_read:
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mbx->count = RDELAY_WAITREAD;
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sc->ch_state = MCD_S_WAITREAD;
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sc->ch = timeout(mcd_timeout, (caddr_t)sc, hz/100); /* XXX */
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callout_reset(&sc->timer, hz / 100, mcd_timeout, sc); /* XXX */
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return;
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case MCD_S_WAITREAD:
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sc->ch_state = MCD_S_WAITREAD;
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untimeout(mcd_timeout, (caddr_t)sc, sc->ch);
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callout_stop(&sc->timer);
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if (mbx->count-- > 0) {
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k = MCD_READ(sc, MCD_FLAGS);
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if (!(k & MFL_DATA_NOT_AVAIL)) { /* XXX */
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@ -947,7 +1002,7 @@ retry_read:
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goto changed;
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}
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sc->ch_state = MCD_S_WAITREAD;
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sc->ch = timeout(mcd_timeout, (caddr_t)sc, hz/100); /* XXX */
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callout_reset(&sc->timer, hz / 100, mcd_timeout, sc); /* XXX */
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return;
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} else {
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device_printf(sc->dev, "timeout read data\n");
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@ -1010,7 +1065,8 @@ mcd_close_tray(struct mcd_softc *sc)
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MCD_WRITE(sc, MCD_REG_COMMAND, MCD_CMDCLOSETRAY);
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for (retry = 0; retry < CLOSE_TRAY_SECS * WAIT_FRAC; retry++) {
|
||||
if (MCD_READ(sc, MCD_FLAGS) & MFL_STATUS_NOT_AVAIL)
|
||||
(void) tsleep((caddr_t)sc, PSOCK | PCATCH, "mcdcls", hz/WAIT_FRAC);
|
||||
(void) mtx_sleep(sc, &sc->mtx, PSOCK | PCATCH,
|
||||
"mcdcls", hz/WAIT_FRAC);
|
||||
else {
|
||||
if ((r = mcd_getstat(sc, 0)) == -1)
|
||||
return (EIO);
|
||||
@ -1303,6 +1359,7 @@ mcd_toc_entrys(struct mcd_softc *sc, struct ioc_read_toc_entry *te)
|
||||
}
|
||||
|
||||
/* copy the data back */
|
||||
MCD_UNLOCK(sc);
|
||||
return copyout(entries, te->data, n * sizeof(struct cd_toc_entry));
|
||||
}
|
||||
|
||||
@ -1418,6 +1475,7 @@ mcd_subchan(struct mcd_softc *sc, struct ioc_read_subchannel *sch, int nocopyout
|
||||
break;
|
||||
}
|
||||
|
||||
MCD_UNLOCK(sc);
|
||||
if (nocopyout == 0)
|
||||
return copyout(&data, sch->data, min(sizeof(struct cd_sub_channel_info), sch->data_len));
|
||||
bcopy(&data, sch->data, min(sizeof(struct cd_sub_channel_info), sch->data_len));
|
||||
|
||||
@ -126,6 +126,7 @@ mcd_alloc_resources (device_t dev)
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
error = 0;
|
||||
mtx_init(&sc->mtx, "mcd", NULL, MTX_DEF);
|
||||
|
||||
if (sc->port_type) {
|
||||
sc->port = bus_alloc_resource_any(dev, sc->port_type,
|
||||
@ -135,8 +136,6 @@ mcd_alloc_resources (device_t dev)
|
||||
error = ENOMEM;
|
||||
goto bad;
|
||||
}
|
||||
sc->port_bst = rman_get_bustag(sc->port);
|
||||
sc->port_bsh = rman_get_bushandle(sc->port);
|
||||
}
|
||||
|
||||
if (sc->irq_type) {
|
||||
@ -159,9 +158,6 @@ mcd_alloc_resources (device_t dev)
|
||||
}
|
||||
}
|
||||
|
||||
mtx_init(&sc->mtx, device_get_nameunit(dev),
|
||||
"Interrupt lock", MTX_DEF | MTX_RECURSE);
|
||||
|
||||
bad:
|
||||
return (error);
|
||||
}
|
||||
@ -175,18 +171,14 @@ mcd_release_resources (device_t dev)
|
||||
|
||||
if (sc->irq_ih)
|
||||
bus_teardown_intr(dev, sc->irq, sc->irq_ih);
|
||||
if (sc->port) {
|
||||
if (sc->port)
|
||||
bus_release_resource(dev, sc->port_type, sc->port_rid, sc->port);
|
||||
sc->port_bst = 0;
|
||||
sc->port_bsh = 0;
|
||||
}
|
||||
if (sc->irq)
|
||||
bus_release_resource(dev, sc->irq_type, sc->irq_rid, sc->irq);
|
||||
if (sc->drq)
|
||||
bus_release_resource(dev, sc->drq_type, sc->drq_rid, sc->drq);
|
||||
|
||||
if (mtx_initialized(&sc->mtx) != 0)
|
||||
mtx_destroy(&sc->mtx);
|
||||
mtx_destroy(&sc->mtx);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
@ -41,8 +41,6 @@ struct mcd_softc {
|
||||
struct resource * port;
|
||||
int port_rid;
|
||||
int port_type;
|
||||
bus_space_tag_t port_bst;
|
||||
bus_space_handle_t port_bsh;
|
||||
|
||||
struct resource * irq;
|
||||
int irq_rid;
|
||||
@ -55,20 +53,19 @@ struct mcd_softc {
|
||||
|
||||
struct mtx mtx;
|
||||
|
||||
struct callout_handle ch;
|
||||
struct callout timer;
|
||||
int ch_state;
|
||||
struct mcd_mbx * ch_mbxsave;
|
||||
|
||||
struct mcd_data data;
|
||||
};
|
||||
|
||||
#define MCD_LOCK(_sc) splx(&(_sc)->mtx
|
||||
#define MCD_UNLOCK(_sc) splx(&(_sc)->mtx
|
||||
#define MCD_LOCK(_sc) mtx_lock(&_sc->mtx)
|
||||
#define MCD_UNLOCK(_sc) mtx_unlock(&_sc->mtx)
|
||||
#define MCD_ASSERT_LOCKED(_sc) mtx_assert(&_sc->mtx, MA_OWNED)
|
||||
|
||||
#define MCD_READ(_sc, _reg) \
|
||||
bus_space_read_1(_sc->port_bst, _sc->port_bsh, _reg)
|
||||
#define MCD_WRITE(_sc, _reg, _val) \
|
||||
bus_space_write_1(_sc->port_bst, _sc->port_bsh, _reg, _val)
|
||||
#define MCD_READ(_sc, _reg) bus_read_1(_sc->port, _reg)
|
||||
#define MCD_WRITE(_sc, _reg, _val) bus_write_1(_sc->port, _reg, _val)
|
||||
|
||||
int mcd_probe (struct mcd_softc *);
|
||||
int mcd_attach (struct mcd_softc *);
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user