diff options
| author | Luigi Semenzato <semenzato@chromium.org> | 2013-01-11 15:50:39 -0800 |
|---|---|---|
| committer | ChromeBot <chrome-bot@google.com> | 2013-01-11 18:15:14 -0800 |
| commit | 3428b4bcd99a6d2e9f8b3e1bdf800d943fbe78c3 (patch) | |
| tree | 3270eaffc59874e813f195f026a1147ef8acd718 /firmware | |
| parent | 17f8d341099120da78a6ca71165834eefb0960ed (diff) | |
| download | vboot-3428b4bcd99a6d2e9f8b3e1bdf800d943fbe78c3.tar.gz | |
Make tpmc able to send and receive raw datagrams.
This is immediately needed to debug a Parrot TPM problems, but
we've had similar situation in the past and probably will again
in the future.
BUG=chromium-os:37819
TEST=manually tested with a couple of different packets, and error inputs
BRANCH=none
Change-Id: Id7f66bdbdfe5887fa49cd62af4a9b807fa3d9a89
Reviewed-on: https://gerrit.chromium.org/gerrit/41166
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Luigi Semenzato <semenzato@chromium.org>
Tested-by: Luigi Semenzato <semenzato@chromium.org>
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/include/tlcl.h | 13 | ||||
| -rw-r--r-- | firmware/lib/tpm_lite/tlcl.c | 9 |
2 files changed, 20 insertions, 2 deletions
diff --git a/firmware/include/tlcl.h b/firmware/include/tlcl.h index 682bc86b..cd82fdca 100644 --- a/firmware/include/tlcl.h +++ b/firmware/include/tlcl.h @@ -33,6 +33,19 @@ void TlclLog(char* format, ...); */ void TlclSetLogLevel(int level); +/* Low-level operations */ + +/* Performs a raw TPM request/response transaction. + */ +uint32_t TlclSendReceive(const uint8_t* request, uint8_t* response, + int max_length); + +/* Returns the size of a TPM request or response packet. + */ +int TlclPacketSize(const uint8_t* packet); + +/* Commands */ + /* Sends a TPM_Startup(ST_CLEAR). The TPM error code is returned (0 * for success). */ diff --git a/firmware/lib/tpm_lite/tlcl.c b/firmware/lib/tpm_lite/tlcl.c index 9a0801f5..332fd019 100644 --- a/firmware/lib/tpm_lite/tlcl.c +++ b/firmware/lib/tpm_lite/tlcl.c @@ -33,6 +33,11 @@ POSSIBLY_UNUSED static INLINE int TpmCommandSize(const uint8_t* buffer) { return (int) size; } +/* Gets the size field of a TPM request or response. */ +int TlclPacketSize(const uint8_t* packet) { + return TpmCommandSize(packet); +} + /* Gets the code field of a TPM command. */ static INLINE int TpmCommandCode(const uint8_t* buffer) { uint32_t code; @@ -93,8 +98,8 @@ static uint32_t TlclSendReceiveNoRetry(const uint8_t* request, /* Sends a TPM command and gets a response. Returns 0 if success or the TPM * error code if error. In the firmware, waits for the self test to complete * if needed. In the host, reports the first error without retries. */ -static uint32_t TlclSendReceive(const uint8_t* request, uint8_t* response, - int max_length) { +uint32_t TlclSendReceive(const uint8_t* request, uint8_t* response, + int max_length) { uint32_t result = TlclSendReceiveNoRetry(request, response, max_length); /* When compiling for the firmware, hide command failures due to the self * test not having run or completed. */ |