Ejemplo n.º 1
0
/* Finish transaction. */
int
tpm_tis12_end(struct tpm_softc *sc, int flag, int err)
{
	int rv = 0;

	if (flag == UIO_READ) {
		if ((rv = tpm_waitfor(sc, TPM_STS_VALID, TPM_READ_TMO,
		    sc->sc_read)))
			return rv;

		/* Still more data? */
		sc->sc_stat = tpm_status(sc);
		if (!err && ((sc->sc_stat & TPM_STS_DATA_AVAIL)
		    == TPM_STS_DATA_AVAIL)) {
#ifdef TPM_DEBUG
			char buf[128];
			snprintb(buf, sizeof(buf), TPM_STS_BITS, sc->sc_stat);
			aprint_debug_dev(sc->sc_dev,
			    "%s: read failed stat=%s\n", __func__, buf);
#endif
			rv = EIO;
		}

		bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_STS,
		    TPM_STS_CMD_READY);

		/* Release our (0th) locality. */
		bus_space_write_1(sc->sc_bt, sc->sc_bh,TPM_ACCESS,
		    TPM_ACCESS_ACTIVE_LOCALITY);
	} else {
		/* Hungry for more? */
		sc->sc_stat = tpm_status(sc);
		if (!err && (sc->sc_stat & TPM_STS_DATA_EXPECT)) {
#ifdef TPM_DEBUG
			char buf[128];
			snprintb(buf, sizeof(buf), TPM_STS_BITS, sc->sc_stat);
			aprint_debug_dev(sc->sc_dev,
			    "%s: write failed stat=%s\n", __func__, buf);
#endif
			rv = EIO;
		}

		bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_STS,
		    err ? TPM_STS_CMD_READY : TPM_STS_GO);
	}

	return rv;
}
Ejemplo n.º 2
0
int
tpm_tis12_write(struct tpm_softc *sc, void *buf, int len)
{
	u_int8_t *p = buf;
	size_t cnt;
	int rv, r;

#ifdef TPM_DEBUG
	printf("tpm_tis12_write: sc %p buf %p len %d\n", sc, buf, len);
#endif

	if ((rv = tpm_request_locality(sc, 0)) != 0)
		return rv;

	cnt = 0;
	while (cnt < len - 1) {
		for (r = tpm_getburst(sc); r > 0 && cnt < len - 1; r--) {
			bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_DATA, *p++);
			cnt++;
		}
		if ((rv = tpm_waitfor(sc, TPM_STS_VALID, TPM_READ_TMO, sc))) {
#ifdef TPM_DEBUG
			printf("tpm_tis12_write: failed burst rv %d\n", rv);
#endif
			return rv;
		}
		sc->sc_stat = tpm_status(sc);
		if (!(sc->sc_stat & TPM_STS_DATA_EXPECT)) {
#ifdef TPM_DEBUG
			printf("tpm_tis12_write: failed rv %d stat=%b\n", rv,
			    sc->sc_stat, TPM_STS_BITS);
#endif
			return EIO;
		}
	}

	bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_DATA, *p++);
	cnt++;

	if ((rv = tpm_waitfor(sc, TPM_STS_VALID, TPM_READ_TMO, sc))) {
#ifdef TPM_DEBUG
		printf("tpm_tis12_write: failed last byte rv %d\n", rv);
#endif
		return rv;
	}
	if ((sc->sc_stat & TPM_STS_DATA_EXPECT) != 0) {
#ifdef TPM_DEBUG
		printf("tpm_tis12_write: failed rv %d stat=%b\n", rv,
		    sc->sc_stat, TPM_STS_BITS);
#endif
		return EIO;
	}

#ifdef TPM_DEBUG
	printf("tpm_tis12_write: wrote %d byte\n", cnt);
#endif

	return 0;
}
Ejemplo n.º 3
0
/* Start transaction. */
int
tpm_tis12_start(struct tpm_softc *sc, int flag)
{
	int rv;

	if (flag == UIO_READ) {
		rv = tpm_waitfor(sc, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
		    TPM_READ_TMO, sc->sc_read);
		return rv;
	}

	/* Own our (0th) locality. */
	if ((rv = tpm_request_locality(sc, 0)) != 0)
		return rv;

	sc->sc_stat = tpm_status(sc);
	if (sc->sc_stat & TPM_STS_CMD_READY) {
#ifdef TPM_DEBUG
		char buf[128];
		snprintb(buf, sizeof(buf), TPM_STS_BITS, sc->sc_stat);
		aprint_debug_dev(sc->sc_dev, "%s: UIO_WRITE status %s\n",
		    __func__, buf);
#endif
		return 0;
	}

#ifdef TPM_DEBUG
	aprint_debug_dev(sc->sc_dev,
	    "%s: UIO_WRITE readying chip\n", __func__);
#endif

	/* Abort previous and restart. */
	bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_STS, TPM_STS_CMD_READY);
	if ((rv = tpm_waitfor(sc, TPM_STS_CMD_READY, TPM_READY_TMO,
	    sc->sc_write))) {
#ifdef TPM_DEBUG
		aprint_debug_dev(sc->sc_dev,
		    "%s: UIO_WRITE readying failed %d\n", __func__, rv);
#endif
		return rv;
	}

#ifdef TPM_DEBUG
	aprint_debug_dev(sc->sc_dev,
	    "%s: UIO_WRITE readying done\n", __func__);
#endif

	return 0;
}
Ejemplo n.º 4
0
/* Start transaction. */
int
tpm_tis12_start(struct tpm_softc *sc, int flag)
{
	int rv;

	if (flag == UIO_READ) {
		rv = tpm_waitfor(sc, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
		    TPM_READ_TMO, sc->sc_read);
		return rv;
	}

	/* Own our (0th) locality. */
	if ((rv = tpm_request_locality(sc, 0)) != 0)
		return rv;

	sc->sc_stat = tpm_status(sc);
	if (sc->sc_stat & TPM_STS_CMD_READY) {
#ifdef TPM_DEBUG
		printf("tpm_tis12_start: UIO_WRITE status %b\n", sc->sc_stat,
		   TPM_STS_BITS);
#endif
		return 0;
	}

#ifdef TPM_DEBUG
	printf("tpm_tis12_start: UIO_WRITE readying chip\n");
#endif

	/* Abort previous and restart. */
	bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_STS, TPM_STS_CMD_READY);
	if ((rv = tpm_waitfor(sc, TPM_STS_CMD_READY, TPM_READY_TMO,
	    sc->sc_write))) {
#ifdef TPM_DEBUG
		printf("tpm_tis12_start: UIO_WRITE readying failed %d\n", rv);
#endif
		return rv;
	}

#ifdef TPM_DEBUG
	printf("tpm_tis12_start: UIO_WRITE readying done\n");
#endif

	return 0;
}
Ejemplo n.º 5
0
/* Wait for given status bits using polling. */
int
tpm_waitfor_poll(struct tpm_softc *sc, u_int8_t mask, int tmo, void *c)
{
	int rv;

	/*
	 * Poll until either the requested condition or a time out is
	 * met.
	 */
	while (((sc->sc_stat = tpm_status(sc)) & mask) != mask && tmo--) {
		rv = tsleep(c, PRIBIO | PCATCH, "tpm_poll", 1);
		if (rv && rv != EWOULDBLOCK) {
#ifdef TPM_DEBUG
			printf("tpm_waitfor_poll: interrupted %d\n", rv);
#endif
			return rv;
		}
	}

	return 0;
}
Ejemplo n.º 6
0
/* Wait for given status bits using interrupts. */
int
tpm_waitfor_int(struct tpm_softc *sc, u_int8_t mask, int tmo, void *c,
    int inttype)
{
	int rv, to;

	/* Poll and return when condition is already met. */
	sc->sc_stat = tpm_status(sc);
	if ((sc->sc_stat & mask) == mask)
		return 0;

	/*
	 * Enable interrupt on tpm chip.  Note that interrupts on our
	 * level (SPL_TTY) are disabled (see tpm{read,write} et al) and
	 * will not be delivered to the cpu until we call tsleep(9) below.
	 */
	bus_space_write_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE,
	    bus_space_read_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE) |
	    inttype);
	bus_space_write_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE,
	    bus_space_read_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE) |
	    TPM_GLOBAL_INT_ENABLE);

	/*
	 * Poll once more to remedy the race between previous polling
	 * and enabling interrupts on the tpm chip.
	 */
	sc->sc_stat = tpm_status(sc);
	if ((sc->sc_stat & mask) == mask) {
		rv = 0;
		goto out;
	}

	to = tpm_tmotohz(tmo);
#ifdef TPM_DEBUG
	printf("tpm_waitfor_int: sleeping for %d ticks on %p\n", to, c);
#endif
	/*
	 * tsleep(9) enables interrupts on the cpu and returns after
	 * wake up with interrupts disabled again.  Note that interrupts
	 * generated by the tpm chip while being at SPL_TTY are not lost
	 * but held and delivered as soon as the cpu goes below SPL_TTY.
	 */
	rv = tsleep(c, PRIBIO | PCATCH, "tpm_intr", to);

	sc->sc_stat = tpm_status(sc);
#ifdef TPM_DEBUG
	printf("tpm_waitfor_int: woke up with rv %d stat %b\n", rv,
	    sc->sc_stat, TPM_STS_BITS);
#endif
	if ((sc->sc_stat & mask) == mask)
		rv = 0;

	/* Disable interrupts on tpm chip again. */
out:	bus_space_write_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE,
	    bus_space_read_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE) &
	    ~TPM_GLOBAL_INT_ENABLE);
	bus_space_write_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE,
	    bus_space_read_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE) &
	    ~inttype);

	return rv;
}
Ejemplo n.º 7
0
int
tpm_tis12_write(struct tpm_softc *sc, const void *buf, size_t len)
{
	const uint8_t *p = buf;
	size_t cnt;
	int rv, r;

#ifdef TPM_DEBUG
	aprint_debug_dev(sc->sc_dev,
	    "%s: sc %p buf %p len %zu\n", __func__, sc, buf, len);
#endif
	if (len == 0)
		return 0;

	if ((rv = tpm_request_locality(sc, 0)) != 0)
		return rv;

	cnt = 0;
	while (cnt < len - 1) {
		for (r = tpm_getburst(sc); r > 0 && cnt < len - 1; r--) {
			bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_DATA, *p++);
			cnt++;
		}
		if ((rv = tpm_waitfor(sc, TPM_STS_VALID, TPM_READ_TMO, sc))) {
#ifdef TPM_DEBUG
			aprint_debug_dev(sc->sc_dev,
			    "%s: failed burst rv %d\n", __func__, rv);
#endif
			return rv;
		}
		sc->sc_stat = tpm_status(sc);
		if (!(sc->sc_stat & TPM_STS_DATA_EXPECT)) {
#ifdef TPM_DEBUG
			char sbuf[128];
			snprintb(sbuf, sizeof(sbuf), TPM_STS_BITS, sc->sc_stat);
			aprint_debug_dev(sc->sc_dev,
			    "%s: failed rv %d stat=%s\n", __func__, rv, sbuf);
#endif
			return EIO;
		}
	}

	bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_DATA, *p++);
	cnt++;

	if ((rv = tpm_waitfor(sc, TPM_STS_VALID, TPM_READ_TMO, sc))) {
#ifdef TPM_DEBUG
		aprint_debug_dev(sc->sc_dev, "%s: failed last byte rv %d\n",
		    __func__, rv);
#endif
		return rv;
	}
	if ((sc->sc_stat & TPM_STS_DATA_EXPECT) != 0) {
#ifdef TPM_DEBUG
		char sbuf[128];
		snprintb(sbuf, sizeof(sbuf), TPM_STS_BITS, sc->sc_stat);
		aprint_debug_dev(sc->sc_dev,
		    "%s: failed rv %d stat=%s\n", __func__, rv, sbuf);
#endif
		return EIO;
	}

#ifdef TPM_DEBUG
	aprint_debug_dev(sc->sc_dev, "%s: wrote %zu byte\n", __func__, cnt);
#endif

	return 0;
}