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Commit 25112048 authored by Jason Gunthorpe's avatar Jason Gunthorpe Committed by Jarkko Sakkinen
Browse files

tpm: rework tpm_get_timeouts() 



IRQ probing needs to know that the TPM is working before trying to
probe, so move tpm_get_timeouts() to the top of the tpm_tis_init().
This has the advantage of also getting the correct timeouts loaded
before doing IRQ probing.

All the timeout handling code is moved to tpm_get_timeouts() in order to
remove duplicate code in tpm_tis and tpm_crb.

[jarkko.sakkinen@linux.intel.com: squashed two patches together and
improved the commit message.]

Signed-off-by: default avatarJason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: default avatarMartin Wilck <Martin.Wilck@ts.fujitsu.com>
Tested-by: default avatarScot Doyle <lkml14@scotdoyle.com>
Signed-off-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Acked-by: default avatarPeter Huewe <peterhuewe@gmx.de>
parent 036bb38f

drivers/char/tpm/tpm-interface.c

+15 −0
Original line number Diff line number Diff line
@@ -503,6 +503,21 @@ int tpm_get_timeouts(struct tpm_chip *chip) 
	struct duration_t *duration_cap;

	ssize_t rc;



	if (chip->flags & TPM_CHIP_FLAG_TPM2) {

		/* Fixed timeouts for TPM2 */

		chip->vendor.timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);

		chip->vendor.timeout_b = msecs_to_jiffies(TPM2_TIMEOUT_B);

		chip->vendor.timeout_c = msecs_to_jiffies(TPM2_TIMEOUT_C);

		chip->vendor.timeout_d = msecs_to_jiffies(TPM2_TIMEOUT_D);

		chip->vendor.duration[TPM_SHORT] =

		    msecs_to_jiffies(TPM2_DURATION_SHORT);

		chip->vendor.duration[TPM_MEDIUM] =

		    msecs_to_jiffies(TPM2_DURATION_MEDIUM);

		chip->vendor.duration[TPM_LONG] =

		    msecs_to_jiffies(TPM2_DURATION_LONG);

		return 0;

	}



	tpm_cmd.header.in = tpm_getcap_header;

	tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;

	tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);

drivers/char/tpm/tpm_crb.c

+3 −11
Original line number Diff line number Diff line
@@ -284,17 +284,9 @@ static int crb_acpi_add(struct acpi_device *device) 


	chip->vendor.priv = priv;



	/* Default timeouts and durations */

	chip->vendor.timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);

	chip->vendor.timeout_b = msecs_to_jiffies(TPM2_TIMEOUT_B);

	chip->vendor.timeout_c = msecs_to_jiffies(TPM2_TIMEOUT_C);

	chip->vendor.timeout_d = msecs_to_jiffies(TPM2_TIMEOUT_D);

	chip->vendor.duration[TPM_SHORT] =

		msecs_to_jiffies(TPM2_DURATION_SHORT);

	chip->vendor.duration[TPM_MEDIUM] =

		msecs_to_jiffies(TPM2_DURATION_MEDIUM);

	chip->vendor.duration[TPM_LONG] =

		msecs_to_jiffies(TPM2_DURATION_LONG);

	rc = tpm_get_timeouts(chip);

	if (rc)

		return rc;



	chip->acpi_dev_handle = device->handle;

drivers/char/tpm/tpm_tis.c

+16 −17
Original line number Diff line number Diff line
@@ -740,6 +740,16 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, 
	if (intfcaps & TPM_INTF_DATA_AVAIL_INT)

		dev_dbg(dev, "\tData Avail Int Support\n");



	/* Very early on issue a command to the TPM in polling mode to make

	 * sure it works. May as well use that command to set the proper

	 *  timeouts for the driver.

	 */

	if (tpm_get_timeouts(chip)) {

		dev_err(dev, "Could not get TPM timeouts and durations\n");

		rc = -ENODEV;

		goto out_err;

	}



	/* INTERRUPT Setup */

	init_waitqueue_head(&chip->vendor.read_queue);

	init_waitqueue_head(&chip->vendor.int_queue);
@@ -837,18 +847,13 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, 
		iowrite8(irq_r, chip->vendor.iobase +

			 TPM_INT_VECTOR(chip->vendor.locality));



	if (chip->flags & TPM_CHIP_FLAG_TPM2) {

		chip->vendor.timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);

		chip->vendor.timeout_b = msecs_to_jiffies(TPM2_TIMEOUT_B);

		chip->vendor.timeout_c = msecs_to_jiffies(TPM2_TIMEOUT_C);

		chip->vendor.timeout_d = msecs_to_jiffies(TPM2_TIMEOUT_D);

		chip->vendor.duration[TPM_SHORT] =

			msecs_to_jiffies(TPM2_DURATION_SHORT);

		chip->vendor.duration[TPM_MEDIUM] =

			msecs_to_jiffies(TPM2_DURATION_MEDIUM);

		chip->vendor.duration[TPM_LONG] =

			msecs_to_jiffies(TPM2_DURATION_LONG);

	if (tpm_get_timeouts(chip)) {

		dev_err(dev, "Could not get TPM timeouts and durations\n");

		rc = -ENODEV;

		goto out_err;

	}



	if (chip->flags & TPM_CHIP_FLAG_TPM2) {

		rc = tpm2_do_selftest(chip);

		if (rc == TPM2_RC_INITIALIZE) {

			dev_warn(dev, "Firmware has not started TPM\n");
@@ -864,12 +869,6 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, 
			goto out_err;

		}

	} else {

		if (tpm_get_timeouts(chip)) {

			dev_err(dev, "Could not get TPM timeouts and durations\n");

			rc = -ENODEV;

			goto out_err;

		}



		if (tpm_do_selftest(chip)) {

			dev_err(dev, "TPM self test failed\n");

			rc = -ENODEV;