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| author | Stefan Berger <stefanb@linux.vnet.ibm.com> | 2011-03-30 18:13:25 +0200 |
|---|---|---|
| committer | Rajiv Andrade <srajiv@linux.vnet.ibm.com> | 2011-07-12 23:53:07 +0200 |
| commit | 04ab2293bbd36fc04060da93058cef7789414585 (patch) | |
| tree | 051266e417a83140a7d2c80486f98e3c219d7eba /drivers/char/tpm/tpm.c | |
| parent | tpm: Adjust the durations if they are too small (diff) | |
| download | linux-04ab2293bbd36fc04060da93058cef7789414585.tar.xz linux-04ab2293bbd36fc04060da93058cef7789414585.zip | |
tpm_tis: Introduce durations sysfs entry
Display the TPM's command timeouts in a 'durations' sysfs entry. Display
the entries as having been adjusted when they were scaled due to their values
being reported in milliseconds rather than microseconds.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Tested-by: Guillaume Chazarain <guichaz@gmail.com>
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Diffstat (limited to 'drivers/char/tpm/tpm.c')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 277cf22609ca..27abfd93714d 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -597,6 +597,7 @@ duration: chip->vendor.duration[TPM_SHORT] = HZ; chip->vendor.duration[TPM_MEDIUM] *= 1000; chip->vendor.duration[TPM_LONG] *= 1000; + chip->vendor.duration_adjusted = true; dev_info(chip->dev, "Adjusting TPM timeout parameters."); } } @@ -944,6 +945,20 @@ ssize_t tpm_show_caps_1_2(struct device * dev, } EXPORT_SYMBOL_GPL(tpm_show_caps_1_2); +ssize_t tpm_show_durations(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct tpm_chip *chip = dev_get_drvdata(dev); + + return sprintf(buf, "%d %d %d [%s]\n", + jiffies_to_usecs(chip->vendor.duration[TPM_SHORT]), + jiffies_to_usecs(chip->vendor.duration[TPM_MEDIUM]), + jiffies_to_usecs(chip->vendor.duration[TPM_LONG]), + chip->vendor.duration_adjusted + ? "adjusted" : "original"); +} +EXPORT_SYMBOL_GPL(tpm_show_durations); + ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { |