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-rw-r--r--kernel/include/linux/tpm.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/kernel/include/linux/tpm.h b/kernel/include/linux/tpm.h
new file mode 100644
index 000000000..8350c538b
--- /dev/null
+++ b/kernel/include/linux/tpm.h
@@ -0,0 +1,67 @@
+/*
+ * 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 */
+
+/*
+ * Chip num is this value or a valid tpm idx
+ */
+#define TPM_ANY_NUM 0xFFFF
+
+struct tpm_chip;
+
+struct tpm_class_ops {
+ 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);
+
+};
+
+#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
+
+extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
+extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
+extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
+extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
+#else
+static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
+ return -ENODEV;
+}
+static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
+ return -ENODEV;
+}
+static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
+ return -ENODEV;
+}
+static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
+ return -ENODEV;
+}
+#endif
+#endif