v4.19.13 snapshot.
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
new file mode 100644
index 0000000..4609b94
--- /dev/null
+++ b/include/linux/tpm.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2004,2007,2008 IBM Corporation
+ *
+ * Authors:
+ * Leendert van Doorn <leendert@watson.ibm.com>
+ * Dave Safford <safford@watson.ibm.com>
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ * Debora Velarde <dvelarde@us.ibm.com>
+ *
+ * Maintained by: <tpmdd_devel@lists.sourceforge.net>
+ *
+ * Device driver for TCG/TCPA TPM (trusted platform module).
+ * Specifications at www.trustedcomputinggroup.org
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ *
+ */
+#ifndef __LINUX_TPM_H__
+#define __LINUX_TPM_H__
+
+#define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
+
+struct tpm_chip;
+struct trusted_key_payload;
+struct trusted_key_options;
+
+enum TPM_OPS_FLAGS {
+ TPM_OPS_AUTO_STARTUP = BIT(0),
+};
+
+struct tpm_class_ops {
+ unsigned int flags;
+ const u8 req_complete_mask;
+ const u8 req_complete_val;
+ bool (*req_canceled)(struct tpm_chip *chip, u8 status);
+ int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
+ int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
+ void (*cancel) (struct tpm_chip *chip);
+ u8 (*status) (struct tpm_chip *chip);
+ bool (*update_timeouts)(struct tpm_chip *chip,
+ unsigned long *timeout_cap);
+ int (*go_idle)(struct tpm_chip *chip);
+ int (*cmd_ready)(struct tpm_chip *chip);
+ int (*request_locality)(struct tpm_chip *chip, int loc);
+ int (*relinquish_locality)(struct tpm_chip *chip, int loc);
+ void (*clk_enable)(struct tpm_chip *chip, bool value);
+};
+
+#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
+
+extern int tpm_is_tpm2(struct tpm_chip *chip);
+extern int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
+extern int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
+extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen);
+extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max);
+extern int tpm_seal_trusted(struct tpm_chip *chip,
+ struct trusted_key_payload *payload,
+ struct trusted_key_options *options);
+extern int tpm_unseal_trusted(struct tpm_chip *chip,
+ struct trusted_key_payload *payload,
+ struct trusted_key_options *options);
+extern struct tpm_chip *tpm_default_chip(void);
+#else
+static inline int tpm_is_tpm2(struct tpm_chip *chip)
+{
+ return -ENODEV;
+}
+static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
+{
+ return -ENODEV;
+}
+static inline int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx,
+ const u8 *hash)
+{
+ return -ENODEV;
+}
+static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
+{
+ return -ENODEV;
+}
+static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max)
+{
+ return -ENODEV;
+}
+
+static inline int tpm_seal_trusted(struct tpm_chip *chip,
+ struct trusted_key_payload *payload,
+ struct trusted_key_options *options)
+{
+ return -ENODEV;
+}
+static inline int tpm_unseal_trusted(struct tpm_chip *chip,
+ struct trusted_key_payload *payload,
+ struct trusted_key_options *options)
+{
+ return -ENODEV;
+}
+static inline struct tpm_chip *tpm_default_chip(void)
+{
+ return NULL;
+}
+#endif
+#endif