tpm2: ftpm: A driver for firmware TPM running inside TEE
Add a driver for a firmware TPM running inside TEE.
Documentation of the firmware TPM:
https://www.microsoft.com/en-us/research/publication/ftpm-software-implementation-tpm-chip/
Implementation of the firmware TPM:
https://github.com/Microsoft/ms-tpm-20-ref/tree/master/Samples/ARM32-FirmwareTPM
Signed-off-by: Thirupathaiah Annapureddy <thiruan@linux.microsoft.com>
diff --git a/drivers/tpm/tpm2_ftpm_tee.h b/drivers/tpm/tpm2_ftpm_tee.h
new file mode 100644
index 0000000..44f9598
--- /dev/null
+++ b/drivers/tpm/tpm2_ftpm_tee.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) Microsoft Corporation
+ */
+
+#ifndef __TPM2_FTPM_TEE_H__
+#define __TPM2_FTPM_TEE_H__
+
+/* This UUID is generated with uuidgen */
+#define TA_FTPM_UUID { 0xBC50D971, 0xD4C9, 0x42C4, \
+ {0x82, 0xCB, 0x34, 0x3F, 0xB7, 0xF3, 0x78, 0x96} }
+
+/* The TAFs ID implemented in this TA */
+#define FTPM_OPTEE_TA_SUBMIT_COMMAND (0)
+#define FTPM_OPTEE_TA_EMULATE_PPI (1)
+
+/* max. buffer size supported by fTPM */
+#define MAX_COMMAND_SIZE 4096
+#define MAX_RESPONSE_SIZE 4096
+
+/**
+ * struct ftpm_tee_private - fTPM's private context
+ * @tee_dev: struct udevice for TEE.
+ * @session: fTPM TA session identifier.
+ * @is_open: Indicates whether the driver is already opened by client or not.
+ * @shm: Memory pool shared with fTPM TA in TEE.
+ */
+struct ftpm_tee_private {
+ struct udevice *tee_dev;
+ u32 session;
+ int is_open;
+ struct tee_shm *shm;
+};
+
+#endif /* __TPM2_FTPM_TEE_H__ */