Since commit
1107d065fdf1 ("tpm_tis: Introduce intermediate layer for
TPM access") Atmel 3203 TPM on ThinkPad X61S (TPM firmware version 13.9)
no longer works. The initialization proceeds fine until we get and
start using chip-reported timeouts - and the chip reports C and D
timeouts of zero.
It turns out that until commit
8e54caf407b98e ("tpm: Provide a generic
means to override the chip returned timeouts") we had actually let
default timeout values remain in this case, so let's bring back this
behavior to make chips like Atmel 3203 work again.
Use a common code that was introduced by that commit so a warning is
printed in this case and /sys/class/tpm/tpm*/timeouts correctly says the
timeouts aren't chip-original.
Fixes: 1107d065fdf1 ("tpm_tis: Introduce intermediate layer for TPM access")
Cc: stable@vger.kernel.org
Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
int tpm_get_timeouts(struct tpm_chip *chip)
{
cap_t cap;
int tpm_get_timeouts(struct tpm_chip *chip)
{
cap_t cap;
- unsigned long new_timeout[4];
- unsigned long old_timeout[4];
+ unsigned long timeout_old[4], timeout_chip[4], timeout_eff[4];
ssize_t rc;
if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)
ssize_t rc;
if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)
- old_timeout[0] = be32_to_cpu(cap.timeout.a);
- old_timeout[1] = be32_to_cpu(cap.timeout.b);
- old_timeout[2] = be32_to_cpu(cap.timeout.c);
- old_timeout[3] = be32_to_cpu(cap.timeout.d);
- memcpy(new_timeout, old_timeout, sizeof(new_timeout));
+ timeout_old[0] = jiffies_to_usecs(chip->timeout_a);
+ timeout_old[1] = jiffies_to_usecs(chip->timeout_b);
+ timeout_old[2] = jiffies_to_usecs(chip->timeout_c);
+ timeout_old[3] = jiffies_to_usecs(chip->timeout_d);
+ timeout_chip[0] = be32_to_cpu(cap.timeout.a);
+ timeout_chip[1] = be32_to_cpu(cap.timeout.b);
+ timeout_chip[2] = be32_to_cpu(cap.timeout.c);
+ timeout_chip[3] = be32_to_cpu(cap.timeout.d);
+ memcpy(timeout_eff, timeout_chip, sizeof(timeout_eff));
/*
* Provide ability for vendor overrides of timeout values in case
/*
* Provide ability for vendor overrides of timeout values in case
*/
if (chip->ops->update_timeouts != NULL)
chip->timeout_adjusted =
*/
if (chip->ops->update_timeouts != NULL)
chip->timeout_adjusted =
- chip->ops->update_timeouts(chip, new_timeout);
+ chip->ops->update_timeouts(chip, timeout_eff);
if (!chip->timeout_adjusted) {
if (!chip->timeout_adjusted) {
- /* Don't overwrite default if value is 0 */
- if (new_timeout[0] != 0 && new_timeout[0] < 1000) {
- int i;
+ /* Restore default if chip reported 0 */
+ int i;
+ for (i = 0; i < ARRAY_SIZE(timeout_eff); i++) {
+ if (timeout_eff[i])
+ continue;
+
+ timeout_eff[i] = timeout_old[i];
+ chip->timeout_adjusted = true;
+ }
+
+ if (timeout_eff[0] != 0 && timeout_eff[0] < 1000) {
/* timeouts in msec rather usec */
/* timeouts in msec rather usec */
- for (i = 0; i != ARRAY_SIZE(new_timeout); i++)
- new_timeout[i] *= 1000;
+ for (i = 0; i != ARRAY_SIZE(timeout_eff); i++)
+ timeout_eff[i] *= 1000;
chip->timeout_adjusted = true;
}
}
chip->timeout_adjusted = true;
}
}
if (chip->timeout_adjusted) {
dev_info(&chip->dev,
HW_ERR "Adjusting reported timeouts: A %lu->%luus B %lu->%luus C %lu->%luus D %lu->%luus\n",
if (chip->timeout_adjusted) {
dev_info(&chip->dev,
HW_ERR "Adjusting reported timeouts: A %lu->%luus B %lu->%luus C %lu->%luus D %lu->%luus\n",
- old_timeout[0], new_timeout[0],
- old_timeout[1], new_timeout[1],
- old_timeout[2], new_timeout[2],
- old_timeout[3], new_timeout[3]);
+ timeout_chip[0], timeout_eff[0],
+ timeout_chip[1], timeout_eff[1],
+ timeout_chip[2], timeout_eff[2],
+ timeout_chip[3], timeout_eff[3]);
- chip->timeout_a = usecs_to_jiffies(new_timeout[0]);
- chip->timeout_b = usecs_to_jiffies(new_timeout[1]);
- chip->timeout_c = usecs_to_jiffies(new_timeout[2]);
- chip->timeout_d = usecs_to_jiffies(new_timeout[3]);
+ chip->timeout_a = usecs_to_jiffies(timeout_eff[0]);
+ chip->timeout_b = usecs_to_jiffies(timeout_eff[1]);
+ chip->timeout_c = usecs_to_jiffies(timeout_eff[2]);
+ chip->timeout_d = usecs_to_jiffies(timeout_eff[3]);
rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_DURATION, &cap,
"attempting to determine the durations");
rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_DURATION, &cap,
"attempting to determine the durations");
irq = tpm_info->irq;
if (itpm)
irq = tpm_info->irq;
if (itpm)
- phy->priv.flags |= TPM_TIS_ITPM_POSSIBLE;
+ phy->priv.flags |= TPM_TIS_ITPM_WORKAROUND;
return tpm_tis_core_init(dev, &phy->priv, irq, &tpm_tcg,
acpi_dev_handle);
return tpm_tis_core_init(dev, &phy->priv, irq, &tpm_tcg,
acpi_dev_handle);
struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
int rc, status, burstcnt;
size_t count = 0;
struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
int rc, status, burstcnt;
size_t count = 0;
- bool itpm = priv->flags & TPM_TIS_ITPM_POSSIBLE;
+ bool itpm = priv->flags & TPM_TIS_ITPM_WORKAROUND;
if (request_locality(chip, 0) < 0)
return -EBUSY;
if (request_locality(chip, 0) < 0)
return -EBUSY;
(chip->flags & TPM_CHIP_FLAG_TPM2) ? "2.0" : "1.2",
vendor >> 16, rid);
(chip->flags & TPM_CHIP_FLAG_TPM2) ? "2.0" : "1.2",
vendor >> 16, rid);
- if (!(priv->flags & TPM_TIS_ITPM_POSSIBLE)) {
+ if (!(priv->flags & TPM_TIS_ITPM_WORKAROUND)) {
probe = probe_itpm(chip);
if (probe < 0) {
rc = -ENODEV;
probe = probe_itpm(chip);
if (probe < 0) {
rc = -ENODEV;
- priv->flags |= TPM_TIS_ITPM_POSSIBLE;
+ priv->flags |= TPM_TIS_ITPM_WORKAROUND;
}
/* Figure out the capabilities */
}
/* Figure out the capabilities */
#define TPM_RID(l) (0x0F04 | ((l) << 12))
enum tpm_tis_flags {
#define TPM_RID(l) (0x0F04 | ((l) << 12))
enum tpm_tis_flags {
- TPM_TIS_ITPM_POSSIBLE = BIT(0),
+ TPM_TIS_ITPM_WORKAROUND = BIT(0),