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| author | Jason Gunthorpe <jgunthorpe@obsidianresearch.com> | 2013-09-17 18:19:44 -0600 |
|---|---|---|
| committer | Peter Huewe <peterhuewe@gmx.de> | 2013-10-22 19:42:41 +0200 |
| commit | e907481bed439cd04fb24084baab41015b89da6e (patch) | |
| tree | 70bee2856387ab821ae02fe95b7fecc2c710871f /drivers/char/tpm/tpm.c | |
| parent | cb996158dfe8a31377700f46b7f3d69ddc5ae1e4 (diff) | |
| download | linux-stable-e907481bed439cd04fb24084baab41015b89da6e.tar.gz linux-stable-e907481bed439cd04fb24084baab41015b89da6e.tar.bz2 linux-stable-e907481bed439cd04fb24084baab41015b89da6e.zip | |
tpm: Remove tpm_show_caps_1_2
The version of the TPM should not depend on the bus it is connected
through. 1.1, 1.2 and soon 2.0 TPMS will be all be able to use the
same bus interfaces.
Make tpm_show_caps try the 1.2 capability first. If that fails then
fall back to the 1.1 capability. This effectively auto-detects what
interface the TPM supports at run-time.
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com>
Reviewed-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'drivers/char/tpm/tpm.c')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 56 |
1 files changed, 23 insertions, 33 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index c3ab508222af..72f0c68d466e 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -1020,43 +1020,33 @@ ssize_t tpm_show_caps(struct device *dev, struct device_attribute *attr, str += sprintf(str, "Manufacturer: 0x%x\n", be32_to_cpu(cap.manufacturer_id)); - rc = tpm_getcap(dev, CAP_VERSION_1_1, &cap, - "attempting to determine the 1.1 version"); - if (rc) - return 0; - str += sprintf(str, - "TCG version: %d.%d\nFirmware version: %d.%d\n", - cap.tpm_version.Major, cap.tpm_version.Minor, - cap.tpm_version.revMajor, cap.tpm_version.revMinor); - return str - buf; -} -EXPORT_SYMBOL_GPL(tpm_show_caps); - -ssize_t tpm_show_caps_1_2(struct device * dev, - struct device_attribute * attr, char *buf) -{ - cap_t cap; - ssize_t rc; - char *str = buf; - - rc = tpm_getcap(dev, TPM_CAP_PROP_MANUFACTURER, &cap, - "attempting to determine the manufacturer"); - if (rc) - return 0; - str += sprintf(str, "Manufacturer: 0x%x\n", - be32_to_cpu(cap.manufacturer_id)); + /* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */ rc = tpm_getcap(dev, CAP_VERSION_1_2, &cap, "attempting to determine the 1.2 version"); - if (rc) - return 0; - str += sprintf(str, - "TCG version: %d.%d\nFirmware version: %d.%d\n", - cap.tpm_version_1_2.Major, cap.tpm_version_1_2.Minor, - cap.tpm_version_1_2.revMajor, - cap.tpm_version_1_2.revMinor); + if (!rc) { + str += sprintf(str, + "TCG version: %d.%d\nFirmware version: %d.%d\n", + cap.tpm_version_1_2.Major, + cap.tpm_version_1_2.Minor, + cap.tpm_version_1_2.revMajor, + cap.tpm_version_1_2.revMinor); + } else { + /* Otherwise just use TPM_STRUCT_VER */ + rc = tpm_getcap(dev, CAP_VERSION_1_1, &cap, + "attempting to determine the 1.1 version"); + if (rc) + return 0; + str += sprintf(str, + "TCG version: %d.%d\nFirmware version: %d.%d\n", + cap.tpm_version.Major, + cap.tpm_version.Minor, + cap.tpm_version.revMajor, + cap.tpm_version.revMinor); + } + return str - buf; } -EXPORT_SYMBOL_GPL(tpm_show_caps_1_2); +EXPORT_SYMBOL_GPL(tpm_show_caps); ssize_t tpm_show_durations(struct device *dev, struct device_attribute *attr, char *buf) |