1 files changed, 82 insertions, 0 deletions
diff --git a/lib/libtpm/tpm_drivers.h b/lib/libtpm/tpm_drivers.h
new file mode 100644
index 0000000..b5d347f
--- /dev/null
+++ b/lib/libtpm/tpm_drivers.h
@@ -0,0 +1,82 @@
+/*****************************************************************************
+ * Copyright (c) 2015-2020 IBM Corporation
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ *     IBM Corporation - initial implementation
+ *****************************************************************************/
+
+#ifndef TPM_DRIVERS_H
+#define TPM_DRIVERS_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+
+#include "tcgbios_int.h"
+
+enum tpm_duration_type {
+	TPM_DURATION_TYPE_SHORT = 0,
+	TPM_DURATION_TYPE_MEDIUM,
+	TPM_DURATION_TYPE_LONG,
+};
+
+/* firmware driver states */
+typedef enum {
+	VTPM_DRV_STATE_INVALID = 0,
+	VTPM_DRV_STATE_INIT_CALLED = 1,
+	VTPM_DRV_STATE_REG_CRQ = 2,
+	VTPM_DRV_STATE_WAIT_INIT = 3,
+	VTPM_DRV_STATE_SEND_INIT = 4,
+	VTPM_DRV_STATE_FAILURE = 5,
+	VTPM_DRV_STATE_WAIT_INIT_COMP = 6,
+	VTPM_DRV_STATE_SEND_INIT_COMP = 7,
+	VTPM_DRV_STATE_SEND_GET_VERSION = 8,
+	VTPM_DRV_STATE_WAIT_VERSION = 9,
+	VTPM_DRV_STATE_CHECK_VERSION = 10,
+	VTPM_DRV_STATE_SEND_BUFSIZE_REQ = 11,
+	VTPM_DRV_STATE_WAIT_BUFSIZE = 12,
+	VTPM_DRV_STATE_ALLOC_RTCE_BUF = 13,
+	VTPM_DRV_STATE_SEND_TPM_CMD = 14,
+	VTPM_DRV_STATE_WAIT_TPM_RSP = 15,
+} vtpm_drv_state;
+
+/* firmware driver errors */
+typedef enum {
+	VTPM_DRV_ERROR_NO_FAILURE = -1,
+	VTPM_DRV_ERROR_NOT_FOUND_TIMEOUT = 0,
+	VTPM_DRV_ERROR_UNEXPECTED_REG_ERROR = 1,
+	VTPM_DRV_ERROR_PARTNER_FAILED = 2,
+	VTPM_DRV_ERROR_UNEXPECTED_TSP_ERROR = 3,
+	VTPM_DRV_ERROR_TPM_PROTOCOL_ERROR = 4,
+	VTPM_DRV_ERROR_WAIT_TIMEOUT = 5,
+	VTPM_DRV_ERROR_UNEXPECTED_SEND_ERROR = 6,
+	VTPM_DRV_ERROR_CRQ_OPEN_FAIL = 7,
+	VTPM_DRV_ERROR_BAD_STATE = 8,
+	VTPM_DRV_ERROR_TPM_FAIL = 9,
+	VTPM_DRV_ERROR_TPM_CRQ_ERROR = 10,
+	VTPM_DRV_ERROR_BAD_VERSION = 11,
+	VTPM_DRV_ERROR_BAD_RTCE_SIZE = 12,
+	VTPM_DRV_ERROR_SML_FAILURE = 13,
+	VTPM_DRV_ERROR_SML_HANDED_OVER = 14,
+} vtpm_drv_error;
+
+/* the max. buffer size by the external TPM is 4k */
+#define PAPR_VTPM_MAX_BUFFER_SIZE       4096
+
+/* exported functions */
+bool spapr_is_vtpm_present(void);
+void spapr_vtpm_finalize(void);
+vtpm_drv_error spapr_vtpm_get_error(void);
+void spapr_vtpm_set_error(vtpm_drv_error errcode);
+
+struct tpm_req_header;
+int spapr_transmit(uint8_t locty, struct tpm_req_header *req,
+                   void *respbuffer, uint32_t *respbufferlen,
+                   enum tpm_duration_type to_t);
+
+#endif /* TPM_DRIVERS_H */