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| author | Stefan Berger <stefanb@linux.vnet.ibm.com> | 2011-03-30 16:13:28 (GMT) |
|---|---|---|
| committer | Rajiv Andrade <srajiv@linux.vnet.ibm.com> | 2011-07-12 21:53:08 (GMT) |
| commit | 6259210176510c64251a314ffb74834a790f09a0 (patch) | |
| tree | 41cdcab9da0e98e93f1b30b31d58ca13abd3ca9b /drivers/char | |
| parent | e3e1a1e169d4e7f73c60ded937ebe24526bc6427 (diff) | |
| download | linux-6259210176510c64251a314ffb74834a790f09a0.tar.xz | |
tpm_tis: Add timeouts sysfs entry
Display the TPM's interface timeouts in a 'timeouts' 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>
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 16 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm.h | 3 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_tis.c | 4 |
3 files changed, 22 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 533ae35..873ef50 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -557,6 +557,7 @@ void tpm_get_timeouts(struct tpm_chip *chip) if (timeout && timeout < 1000) { /* timeouts in msec rather usec */ scale = 1000; + chip->vendor.timeout_adjusted = true; } if (timeout) chip->vendor.timeout_a = usecs_to_jiffies(timeout * scale); @@ -965,6 +966,21 @@ ssize_t tpm_show_durations(struct device *dev, struct device_attribute *attr, } EXPORT_SYMBOL_GPL(tpm_show_durations); +ssize_t tpm_show_timeouts(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct tpm_chip *chip = dev_get_drvdata(dev); + + return sprintf(buf, "%d %d %d %d [%s]\n", + jiffies_to_usecs(chip->vendor.timeout_a), + jiffies_to_usecs(chip->vendor.timeout_b), + jiffies_to_usecs(chip->vendor.timeout_c), + jiffies_to_usecs(chip->vendor.timeout_d), + chip->vendor.timeout_adjusted + ? "adjusted" : "original"); +} +EXPORT_SYMBOL_GPL(tpm_show_timeouts); + ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 6fc7976..c5e01c5 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -58,6 +58,8 @@ extern ssize_t tpm_show_temp_deactivated(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_durations(struct device *, struct device_attribute *attr, char *); +extern ssize_t tpm_show_timeouts(struct device *, + struct device_attribute *attr, char *); struct tpm_chip; @@ -83,6 +85,7 @@ struct tpm_vendor_specific { struct list_head list; int locality; unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */ + bool timeout_adjusted; unsigned long duration[3]; /* jiffies */ bool duration_adjusted; diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index e15b30d..a84108c 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -377,6 +377,7 @@ static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated, static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL); static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel); static DEVICE_ATTR(durations, S_IRUGO, tpm_show_durations, NULL); +static DEVICE_ATTR(timeouts, S_IRUGO, tpm_show_timeouts, NULL); static struct attribute *tis_attrs[] = { &dev_attr_pubek.attr, @@ -387,7 +388,8 @@ static struct attribute *tis_attrs[] = { &dev_attr_temp_deactivated.attr, &dev_attr_caps.attr, &dev_attr_cancel.attr, - &dev_attr_durations.attr, NULL, + &dev_attr_durations.attr, + &dev_attr_timeouts.attr, NULL, }; static struct attribute_group tis_attr_grp = { |