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Message-Id: <1411549562-24242-3-git-send-email-jarkko.sakkinen@linux.intel.com>
Date: Wed, 24 Sep 2014 12:05:52 +0300
From: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To: tpmdd-devel@...ts.sourceforge.net
Cc: Peter Huewe <peterhuewe@....de>,
Marcel Selhorst <tpmdd@...horst.net>,
linux-kernel@...r.kernel.org, jgunthorpe@...idianresearch.com,
Will Arthur <will.c.arthur@...el.com>,
Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Subject: [PATCH v1 02/12] tpm: TPM2 support for tpm_calc_ordinal_durations()
From: Will Arthur <will.c.arthur@...el.com>
Implemented TPM2 support for tpm_calc_ordinal_duration(). TPM2 version
is encapsulated into tpm2_calc_ordinal_duration() that is called by
tpm_calc_ordinal_duration() for TPM2 chips.
[jarkko.sakkinen: implemented tpm2_calc_ordinal_duration() based on
the Wills original patch. Updated durations table to use worst case
estimates.]
Signed-off-by: Will Arthur <will.c.arthur@...el.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
---
drivers/char/tpm/Makefile | 2 +-
drivers/char/tpm/tpm-interface.c | 7 +-
drivers/char/tpm/tpm.h | 1 +
drivers/char/tpm/tpm2-commands.c | 159 +++++++++++++++++++++++++++++++++++++++
drivers/char/tpm/tpm2.h | 26 +++++++
5 files changed, 193 insertions(+), 2 deletions(-)
create mode 100644 drivers/char/tpm/tpm2-commands.c
create mode 100644 drivers/char/tpm/tpm2.h
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index 837da04..5ff5f3d 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -2,7 +2,7 @@
# Makefile for the kernel tpm device drivers.
#
obj-$(CONFIG_TCG_TPM) += tpm.o
-tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o
+tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o tpm2-commands.o
tpm-$(CONFIG_ACPI) += tpm_ppi.o
ifdef CONFIG_ACPI
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 3c54570..07a2fc5 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -309,7 +309,12 @@ unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
{
int duration_idx = TPM_UNDEFINED;
int duration = 0;
- u8 category = (ordinal >> 24) & 0xFF;
+ u8 category;
+
+ if (chip->tpm2)
+ return tpm2_calc_ordinal_duration(chip, ordinal);
+
+ category = (ordinal >> 24) & 0xFF;
if ((category == TPM_PROTECTED_COMMAND && ordinal < TPM_MAX_ORDINAL) ||
(category == TPM_CONNECTION_COMMAND && ordinal < TSC_MAX_ORDINAL))
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index cc95a52..bda88aa 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -27,6 +27,7 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/tpm.h>
+#include "tpm2.h"
enum tpm_const {
TPM_MINOR = 224, /* officially assigned */
diff --git a/drivers/char/tpm/tpm2-commands.c b/drivers/char/tpm/tpm2-commands.c
new file mode 100644
index 0000000..14b3ae7
--- /dev/null
+++ b/drivers/char/tpm/tpm2-commands.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
+ *
+ * Maintained by: <tpmdd-devel@...ts.sourceforge.net>
+ *
+ * This file contains TPM2 protocol implementations of the commands
+ * used by the kernel internally.
+ *
+ * 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.
+ */
+
+#include "tpm.h"
+
+/*
+ * Array with one entry per ordinal defining the maximum amount
+ * of time the chip could take to return the result. The values
+ * of the SHORT, MEDIUM, and LONG durations are retrieved from
+ * the chip during initialization with a call to tpm_get_timeouts.
+ */
+static const u8 tpm2_ordinal_duration[TPM2_CC_LAST - TPM2_CC_FIRST + 1] = {
+ TPM_UNDEFINED, /* 11F */
+ TPM_UNDEFINED, /* 120 */
+ TPM_LONG, /* 121 */
+ TPM_UNDEFINED, /* 122 */
+ TPM_UNDEFINED, /* 123 */
+ TPM_UNDEFINED, /* 124 */
+ TPM_UNDEFINED, /* 125 */
+ TPM_UNDEFINED, /* 126 */
+ TPM_UNDEFINED, /* 127 */
+ TPM_UNDEFINED, /* 128 */
+ TPM_LONG, /* 129 */
+ TPM_UNDEFINED, /* 12a */
+ TPM_UNDEFINED, /* 12b */
+ TPM_UNDEFINED, /* 12c */
+ TPM_UNDEFINED, /* 12d */
+ TPM_UNDEFINED, /* 12e */
+ TPM_UNDEFINED, /* 12f */
+ TPM_UNDEFINED, /* 130 */
+ TPM_UNDEFINED, /* 131 */
+ TPM_UNDEFINED, /* 132 */
+ TPM_UNDEFINED, /* 133 */
+ TPM_UNDEFINED, /* 134 */
+ TPM_UNDEFINED, /* 135 */
+ TPM_UNDEFINED, /* 136 */
+ TPM_UNDEFINED, /* 137 */
+ TPM_UNDEFINED, /* 138 */
+ TPM_UNDEFINED, /* 139 */
+ TPM_UNDEFINED, /* 13a */
+ TPM_UNDEFINED, /* 13b */
+ TPM_UNDEFINED, /* 13c */
+ TPM_UNDEFINED, /* 13d */
+ TPM_MEDIUM, /* 13e */
+ TPM_UNDEFINED, /* 13f */
+ TPM_UNDEFINED, /* 140 */
+ TPM_UNDEFINED, /* 141 */
+ TPM_UNDEFINED, /* 142 */
+ TPM_LONG, /* 143 */
+ TPM_MEDIUM, /* 144 */
+ TPM_UNDEFINED, /* 145 */
+ TPM_UNDEFINED, /* 146 */
+ TPM_UNDEFINED, /* 147 */
+ TPM_UNDEFINED, /* 148 */
+ TPM_UNDEFINED, /* 149 */
+ TPM_UNDEFINED, /* 14a */
+ TPM_UNDEFINED, /* 14b */
+ TPM_UNDEFINED, /* 14c */
+ TPM_UNDEFINED, /* 14d */
+ TPM_LONG, /* 14e */
+ TPM_UNDEFINED, /* 14f */
+ TPM_UNDEFINED, /* 150 */
+ TPM_UNDEFINED, /* 151 */
+ TPM_UNDEFINED, /* 152 */
+ TPM_UNDEFINED, /* 153 */
+ TPM_UNDEFINED, /* 154 */
+ TPM_UNDEFINED, /* 155 */
+ TPM_UNDEFINED, /* 156 */
+ TPM_UNDEFINED, /* 157 */
+ TPM_UNDEFINED, /* 158 */
+ TPM_UNDEFINED, /* 159 */
+ TPM_UNDEFINED, /* 15a */
+ TPM_UNDEFINED, /* 15b */
+ TPM_MEDIUM, /* 15c */
+ TPM_UNDEFINED, /* 15d */
+ TPM_UNDEFINED, /* 15e */
+ TPM_UNDEFINED, /* 15f */
+ TPM_UNDEFINED, /* 160 */
+ TPM_UNDEFINED, /* 161 */
+ TPM_UNDEFINED, /* 162 */
+ TPM_UNDEFINED, /* 163 */
+ TPM_UNDEFINED, /* 164 */
+ TPM_UNDEFINED, /* 165 */
+ TPM_UNDEFINED, /* 166 */
+ TPM_UNDEFINED, /* 167 */
+ TPM_UNDEFINED, /* 168 */
+ TPM_UNDEFINED, /* 169 */
+ TPM_UNDEFINED, /* 16a */
+ TPM_UNDEFINED, /* 16b */
+ TPM_UNDEFINED, /* 16c */
+ TPM_UNDEFINED, /* 16d */
+ TPM_UNDEFINED, /* 16e */
+ TPM_UNDEFINED, /* 16f */
+ TPM_UNDEFINED, /* 170 */
+ TPM_UNDEFINED, /* 171 */
+ TPM_UNDEFINED, /* 172 */
+ TPM_UNDEFINED, /* 173 */
+ TPM_UNDEFINED, /* 174 */
+ TPM_UNDEFINED, /* 175 */
+ TPM_UNDEFINED, /* 176 */
+ TPM_LONG, /* 177 */
+ TPM_UNDEFINED, /* 178 */
+ TPM_UNDEFINED, /* 179 */
+ TPM_MEDIUM, /* 17a */
+ TPM_LONG, /* 17b */
+ TPM_UNDEFINED, /* 17c */
+ TPM_UNDEFINED, /* 17d */
+ TPM_UNDEFINED, /* 17e */
+ TPM_UNDEFINED, /* 17f */
+ TPM_UNDEFINED, /* 180 */
+ TPM_UNDEFINED, /* 181 */
+ TPM_MEDIUM, /* 182 */
+ TPM_UNDEFINED, /* 183 */
+ TPM_UNDEFINED, /* 184 */
+ TPM_MEDIUM, /* 185 */
+ TPM_MEDIUM, /* 186 */
+ TPM_UNDEFINED, /* 187 */
+ TPM_UNDEFINED, /* 188 */
+ TPM_UNDEFINED, /* 189 */
+ TPM_UNDEFINED, /* 18a */
+ TPM_UNDEFINED, /* 18b */
+ TPM_UNDEFINED, /* 18c */
+ TPM_UNDEFINED, /* 18d */
+ TPM_UNDEFINED, /* 18e */
+ TPM_UNDEFINED /* 18f */
+};
+
+/*
+ * Returns max number of jiffies to wait
+ */
+unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
+{
+ int index = TPM_UNDEFINED;
+ int duration = 0;
+
+ if (ordinal >= TPM2_CC_FIRST && ordinal <= TPM2_CC_LAST)
+ index = tpm2_ordinal_duration[ordinal - TPM2_CC_FIRST];
+
+ if (index != TPM_UNDEFINED)
+ duration = chip->vendor.duration[index];
+ if (duration <= 0)
+ return 2 * 60 * HZ;
+ else
+ return duration;
+}
diff --git a/drivers/char/tpm/tpm2.h b/drivers/char/tpm/tpm2.h
new file mode 100644
index 0000000..dc0a2a2
--- /dev/null
+++ b/drivers/char/tpm/tpm2.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
+ *
+ * Maintained by: <tpmdd-devel@...ts.sourceforge.net>
+ *
+ * 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 __DRIVERS_CHAR_TPM2_H__
+#define __DRIVERS_CHAR_TPM2_H__
+
+struct tpm_chip;
+
+#define TPM2_CC_FIRST 0x11F
+#define TPM2_CC_LAST 0x18F
+
+unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32);
+
+#endif /* __DRIVERS_CHAR_TPM2_H__ */
--
2.1.0
--
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