diff mbox series

[v5,05/21] tpm: factor out tpm_get_timeouts()

Message ID 20180928223035.14471-6-tomas.winkler@intel.com (mailing list archive)
State New, archived
Headers show
Series tpm: separate tpm 1.x and tpm 2.x commands | expand

Commit Message

Winkler, Tomas Sept. 28, 2018, 10:30 p.m. UTC
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>
---
V2-V3: Rebase
V4: Fix the commit message.
V5: Resend.

 drivers/char/tpm/tpm-interface.c | 127 ++-------------------------------------
 drivers/char/tpm/tpm.h           |   5 +-
 drivers/char/tpm/tpm1-cmd.c      | 106 ++++++++++++++++++++++++++++++++
 drivers/char/tpm/tpm2-cmd.c      |  22 +++++++
 4 files changed, 136 insertions(+), 124 deletions(-)

Comments

Nayna Jain Oct. 11, 2018, 5 p.m. UTC | #1
On 09/29/2018 04:00 AM, Tomas Winkler wrote:
>
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 73511cd89bef..a97d72fcda5b 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -544,8 +544,10 @@ int tpm_startup(struct tpm_chip *chip);
>   ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
>   		   const char *desc, size_t min_cap_length);
>   int tpm_get_timeouts(struct tpm_chip *);
> -int tpm1_auto_startup(struct tpm_chip *chip);
>   int tpm_do_selftest(struct tpm_chip *chip);
> +
> +int tpm1_auto_startup(struct tpm_chip *chip);

What is different in this tpm1_auto_startup(...) and the original one ?

Is this needed ?

Thanks & Regards,
    - Nayna


> +int tpm1_get_timeouts(struct tpm_chip *chip);
>   unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
>   unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
>   int tpm_pm_suspend(struct device *dev);
> @@ -585,6 +587,7 @@ static inline u32 tpm2_rc_value(u32 rc)
>   	return (rc & BIT(7)) ? rc & 0xff : rc;
>   }
>
> +int tpm2_get_timeouts(struct tpm_chip *chip);
>   int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
>   int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count,
>   		    struct tpm2_digest *digests);
> diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
> index dfbe9c60cbcf..978946748ea3 100644
> --- a/drivers/char/tpm/tpm1-cmd.c
> +++ b/drivers/char/tpm/tpm1-cmd.c
> @@ -307,3 +307,109 @@ unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
>   	else
>   		return duration;
>   }
> +
> +int tpm1_get_timeouts(struct tpm_chip *chip)
> +{
> +	cap_t cap;
> +	unsigned long timeout_old[4], timeout_chip[4], timeout_eff[4];
> +	ssize_t rc;
> +
> +	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)
> +		chip->timeout_adjusted =
> +			chip->ops->update_timeouts(chip, timeout_eff);
> +
> +	if (!chip->timeout_adjusted) {
> +		/* Restore default if chip reported 0 */
> +		unsigned 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;
> +}
> diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
> index 5e7bf8842be0..49df54b0e210 100644
> --- a/drivers/char/tpm/tpm2-cmd.c
> +++ b/drivers/char/tpm/tpm2-cmd.c
> @@ -40,6 +40,28 @@ static struct tpm2_hash tpm2_hash_map[] = {
>   	{HASH_ALGO_SM3_256, TPM2_ALG_SM3_256},
>   };
>
> +int tpm2_get_timeouts(struct tpm_chip *chip)
> +{
> +	/* 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);
> +
> +	/* PTP spec timeouts */
> +	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);
> +
> +	/* Key creation commands long timeouts */
> +	chip->duration[TPM_LONG_LONG] =
> +		msecs_to_jiffies(TPM2_DURATION_LONG_LONG);
> +
> +	chip->flags |= TPM_CHIP_FLAG_HAVE_TIMEOUTS;
> +
> +	return 0;
> +}
> +
>   /**
>    * tpm2_ordinal_duration_index() - returns an index to the chip duration table
>    * @ordinal: TPM command ordinal.
Winkler, Tomas Oct. 11, 2018, 8:16 p.m. UTC | #2
On Thu, 2018-10-11 at 22:30 +0530, Nayna Jain wrote:
> 
> On 09/29/2018 04:00 AM, Tomas Winkler wrote:
> > 
> > diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> > index 73511cd89bef..a97d72fcda5b 100644
> > --- a/drivers/char/tpm/tpm.h
> > +++ b/drivers/char/tpm/tpm.h
> > @@ -544,8 +544,10 @@ int tpm_startup(struct tpm_chip *chip);
> >   ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
> >   		   const char *desc, size_t min_cap_length);
> >   int tpm_get_timeouts(struct tpm_chip *);
> > -int tpm1_auto_startup(struct tpm_chip *chip);
> >   int tpm_do_selftest(struct tpm_chip *chip);
> > +
> > +int tpm1_auto_startup(struct tpm_chip *chip);
> 
> What is different in this tpm1_auto_startup(...) and the original one ?
> 
> Is this needed ?
Looks like an amending  hiccup, will fix.
Thanks
Tomas
diff mbox series

Patch

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);
 
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 73511cd89bef..a97d72fcda5b 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -544,8 +544,10 @@  int tpm_startup(struct tpm_chip *chip);
 ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
 		   const char *desc, size_t min_cap_length);
 int tpm_get_timeouts(struct tpm_chip *);
-int tpm1_auto_startup(struct tpm_chip *chip);
 int tpm_do_selftest(struct tpm_chip *chip);
+
+int tpm1_auto_startup(struct tpm_chip *chip);
+int tpm1_get_timeouts(struct tpm_chip *chip);
 unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
 unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
 int tpm_pm_suspend(struct device *dev);
@@ -585,6 +587,7 @@  static inline u32 tpm2_rc_value(u32 rc)
 	return (rc & BIT(7)) ? rc & 0xff : rc;
 }
 
+int tpm2_get_timeouts(struct tpm_chip *chip);
 int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
 int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count,
 		    struct tpm2_digest *digests);
diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
index dfbe9c60cbcf..978946748ea3 100644
--- a/drivers/char/tpm/tpm1-cmd.c
+++ b/drivers/char/tpm/tpm1-cmd.c
@@ -307,3 +307,109 @@  unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
 	else
 		return duration;
 }
+
+int tpm1_get_timeouts(struct tpm_chip *chip)
+{
+	cap_t cap;
+	unsigned long timeout_old[4], timeout_chip[4], timeout_eff[4];
+	ssize_t rc;
+
+	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)
+		chip->timeout_adjusted =
+			chip->ops->update_timeouts(chip, timeout_eff);
+
+	if (!chip->timeout_adjusted) {
+		/* Restore default if chip reported 0 */
+		unsigned 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;
+}
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 5e7bf8842be0..49df54b0e210 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -40,6 +40,28 @@  static struct tpm2_hash tpm2_hash_map[] = {
 	{HASH_ALGO_SM3_256, TPM2_ALG_SM3_256},
 };
 
+int tpm2_get_timeouts(struct tpm_chip *chip)
+{
+	/* 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);
+
+	/* PTP spec timeouts */
+	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);
+
+	/* Key creation commands long timeouts */
+	chip->duration[TPM_LONG_LONG] =
+		msecs_to_jiffies(TPM2_DURATION_LONG_LONG);
+
+	chip->flags |= TPM_CHIP_FLAG_HAVE_TIMEOUTS;
+
+	return 0;
+}
+
 /**
  * tpm2_ordinal_duration_index() - returns an index to the chip duration table
  * @ordinal: TPM command ordinal.