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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: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com>
Tested-by: Scot Doyle <lkml14@scotdoyle.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Acked-by: Peter Huewe <peterhuewe@gmx.de>
This commit is contained in:
Jason Gunthorpe 2015-11-25 14:05:32 -07:00 committed by Jarkko Sakkinen
parent 036bb38ffb
commit 25112048cd
3 changed files with 34 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/char/tpm/tpm-interface.c
View File

@ -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);

14
drivers/char/tpm/tpm_crb.c
View File

@ -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;

33
drivers/char/tpm/tpm_tis.c
View File

@ -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;