tpm: factor out tpm_get_timeouts()

Factor out tpm_get_timeouts() into tpm2_get_timeouts()
and tpm1_get_timeouts()

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

1 files changed, 4 insertions, 123 deletions

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 305eb3069101..1fa0300f3829 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -502,132 +502,13 @@ EXPORT_SYMBOL_GPL(tpm_getcap);
 
 int tpm_get_timeouts(struct tpm_chip *chip)
 {
-	cap_t cap;
-	unsigned long timeout_old[4], timeout_chip[4], timeout_eff[4];
-	ssize_t rc;
-
 	if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)
 		return 0;
 
-	if (chip->flags & TPM_CHIP_FLAG_TPM2) {
-		/* Fixed timeouts for TPM2 */
-		chip->timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);
-		chip->timeout_b = msecs_to_jiffies(TPM2_TIMEOUT_B);
-		chip->timeout_c = msecs_to_jiffies(TPM2_TIMEOUT_C);
-		chip->timeout_d = msecs_to_jiffies(TPM2_TIMEOUT_D);
-		chip->duration[TPM_SHORT] =
-		    msecs_to_jiffies(TPM2_DURATION_SHORT);
-		chip->duration[TPM_MEDIUM] =
-		    msecs_to_jiffies(TPM2_DURATION_MEDIUM);
-		chip->duration[TPM_LONG] =
-		    msecs_to_jiffies(TPM2_DURATION_LONG);
-		chip->duration[TPM_LONG_LONG] =
-		    msecs_to_jiffies(TPM2_DURATION_LONG_LONG);
-
-		chip->flags |= TPM_CHIP_FLAG_HAVE_TIMEOUTS;
-		return 0;
-	}
-
-	rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap, NULL,
-			sizeof(cap.timeout));
-	if (rc == TPM_ERR_INVALID_POSTINIT) {
-		if (tpm_startup(chip))
-			return rc;
-
-		rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap,
-				"attempting to determine the timeouts",
-				sizeof(cap.timeout));
-	}
-
-	if (rc) {
-		dev_err(&chip->dev,
-			"A TPM error (%zd) occurred attempting to determine the timeouts\n",
-			rc);
-		return rc;
-	}
-
-	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
-	 * of misreporting.
-	 */
-	if (chip->ops->update_timeouts != NULL)
-		chip->timeout_adjusted =
-			chip->ops->update_timeouts(chip, timeout_eff);
-
-	if (!chip->timeout_adjusted) {
-		/* 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 */
-			for (i = 0; i != ARRAY_SIZE(timeout_eff); i++)
-				timeout_eff[i] *= 1000;
-			chip->timeout_adjusted = true;
-		}
-	}
-
-	/* Report adjusted timeouts */
-	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",
-			 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(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",
-			sizeof(cap.duration));
-	if (rc)
-		return rc;
-
-	chip->duration[TPM_SHORT] =
-		usecs_to_jiffies(be32_to_cpu(cap.duration.tpm_short));
-	chip->duration[TPM_MEDIUM] =
-		usecs_to_jiffies(be32_to_cpu(cap.duration.tpm_medium));
-	chip->duration[TPM_LONG] =
-		usecs_to_jiffies(be32_to_cpu(cap.duration.tpm_long));
-	chip->duration[TPM_LONG_LONG] = 0; /* not used under 1.2 */
-
-	/* The Broadcom BCM0102 chipset in a Dell Latitude D820 gets the above
-	 * value wrong and apparently reports msecs rather than usecs. So we
-	 * fix up the resulting too-small TPM_SHORT value to make things work.
-	 * We also scale the TPM_MEDIUM and -_LONG values by 1000.
-	 */
-	if (chip->duration[TPM_SHORT] < (HZ / 100)) {
-		chip->duration[TPM_SHORT] = HZ;
-		chip->duration[TPM_MEDIUM] *= 1000;
-		chip->duration[TPM_LONG] *= 1000;
-		chip->duration_adjusted = true;
-		dev_info(&chip->dev, "Adjusting TPM timeout parameters.");
-	}
-
-	chip->flags |= TPM_CHIP_FLAG_HAVE_TIMEOUTS;
-	return 0;
+	if (chip->flags & TPM_CHIP_FLAG_TPM2)
+		return tpm2_get_timeouts(chip);
+	else
+		return tpm1_get_timeouts(chip);
 }
 EXPORT_SYMBOL_GPL(tpm_get_timeouts);