tpmdd-devel.lists.sourceforge.net archive mirror
 help / color / mirror / Atom feed
* [PATCH] tpm: move tpm_pcr_read_dev() to tpm1-cmd.c
@ 2016-03-29 21:30 Jarkko Sakkinen
       [not found] ` <1459287050-3809-1-git-send-email-jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
  0 siblings, 1 reply; 2+ messages in thread
From: Jarkko Sakkinen @ 2016-03-29 21:30 UTC (permalink / raw)
  To: Peter Huewe; +Cc: moderated list:TPM DEVICE DRIVER, open list

Created tpm1-cmd.c for TPM1 commands like we have one for TPM2 commands
and moved tpm_pcr_read_dev() there and renamed it as tpm1_pcr_read().

Created a common enum tpm1_ordinals that is accesible both from
tpm1-cmd.c and tpm-interface.c because TPM1_ORD_PCRREAD is used by two
functions and it is nice to have a list of ordinals available that the
TPM driver is using at the moment.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
 drivers/char/tpm/Makefile        |  2 +-
 drivers/char/tpm/tpm-interface.c | 53 ++++++++++------------------------------
 drivers/char/tpm/tpm-sysfs.c     |  2 +-
 drivers/char/tpm/tpm.h           | 17 ++++++++++++-
 drivers/char/tpm/tpm1-cmd.c      | 46 ++++++++++++++++++++++++++++++++++
 5 files changed, 77 insertions(+), 43 deletions(-)
 create mode 100644 drivers/char/tpm/tpm1-cmd.c

diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index 56e8f1f..2547bb3 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the kernel tpm device drivers.
 #
 obj-$(CONFIG_TCG_TPM) += tpm.o
-tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o tpm2-cmd.o
+tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o tpm1-cmd.o tpm2-cmd.o
 tpm-$(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 5397b64..f2b2086 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -423,13 +423,11 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd,
 }
 
 #define TPM_INTERNAL_RESULT_SIZE 200
-#define TPM_ORD_GET_CAP cpu_to_be32(101)
-#define TPM_ORD_GET_RANDOM cpu_to_be32(70)
 
 static const struct tpm_input_header tpm_getcap_header = {
 	.tag = TPM_TAG_RQU_COMMAND,
 	.length = cpu_to_be32(22),
-	.ordinal = TPM_ORD_GET_CAP
+	.ordinal = TPM1_ORD_GET_CAP
 };
 
 ssize_t tpm_getcap(struct device *dev, __be32 subcap_id, cap_t *cap,
@@ -475,14 +473,13 @@ void tpm_gen_interrupt(struct tpm_chip *chip)
 }
 EXPORT_SYMBOL_GPL(tpm_gen_interrupt);
 
-#define TPM_ORD_STARTUP cpu_to_be32(153)
 #define TPM_ST_CLEAR cpu_to_be16(1)
 #define TPM_ST_STATE cpu_to_be16(2)
 #define TPM_ST_DEACTIVATED cpu_to_be16(3)
 static const struct tpm_input_header tpm_startup_header = {
 	.tag = TPM_TAG_RQU_COMMAND,
 	.length = cpu_to_be32(12),
-	.ordinal = TPM_ORD_STARTUP
+	.ordinal = TPM1_ORD_STARTUP
 };
 
 static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
@@ -631,13 +628,12 @@ duration:
 }
 EXPORT_SYMBOL_GPL(tpm_get_timeouts);
 
-#define TPM_ORD_CONTINUE_SELFTEST 83
 #define CONTINUE_SELFTEST_RESULT_SIZE 10
 
 static struct tpm_input_header continue_selftest_header = {
 	.tag = TPM_TAG_RQU_COMMAND,
 	.length = cpu_to_be32(10),
-	.ordinal = cpu_to_be32(TPM_ORD_CONTINUE_SELFTEST),
+	.ordinal = TPM1_ORD_CONTINUE_SELFTEST
 };
 
 /**
@@ -658,30 +654,6 @@ static int tpm_continue_selftest(struct tpm_chip *chip)
 	return rc;
 }
 
-#define TPM_ORDINAL_PCRREAD cpu_to_be32(21)
-#define READ_PCR_RESULT_SIZE 30
-static struct tpm_input_header pcrread_header = {
-	.tag = TPM_TAG_RQU_COMMAND,
-	.length = cpu_to_be32(14),
-	.ordinal = TPM_ORDINAL_PCRREAD
-};
-
-int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
-{
-	int rc;
-	struct tpm_cmd_t cmd;
-
-	cmd.header.in = pcrread_header;
-	cmd.params.pcrread_in.pcr_idx = cpu_to_be32(pcr_idx);
-	rc = tpm_transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE,
-			      "attempting to read a pcr value");
-
-	if (rc == 0)
-		memcpy(res_buf, cmd.params.pcrread_out.pcr_result,
-		       TPM_DIGEST_SIZE);
-	return rc;
-}
-
 /**
  * tpm_is_tpm2 - is the chip a TPM2 chip?
  * @chip_num:	tpm idx # or ANY
@@ -728,7 +700,7 @@ int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf)
 	if (chip->flags & TPM_CHIP_FLAG_TPM2)
 		rc = tpm2_pcr_read(chip, pcr_idx, res_buf);
 	else
-		rc = tpm_pcr_read_dev(chip, pcr_idx, res_buf);
+		rc = tpm1_pcr_read(chip, pcr_idx, res_buf);
 	tpm_put_ops(chip);
 	return rc;
 }
@@ -744,12 +716,11 @@ EXPORT_SYMBOL_GPL(tpm_pcr_read);
  * isn't, protect against the chip disappearing, by incrementing
  * the module usage count.
  */
-#define TPM_ORD_PCR_EXTEND cpu_to_be32(20)
 #define EXTEND_PCR_RESULT_SIZE 34
 static struct tpm_input_header pcrextend_header = {
 	.tag = TPM_TAG_RQU_COMMAND,
 	.length = cpu_to_be32(34),
-	.ordinal = TPM_ORD_PCR_EXTEND
+	.ordinal = TPM1_ORD_PCR_EXTEND
 };
 
 int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
@@ -795,7 +766,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
 	unsigned long duration;
 	struct tpm_cmd_t cmd;
 
-	duration = tpm_calc_ordinal_duration(chip, TPM_ORD_CONTINUE_SELFTEST);
+	duration = tpm_calc_ordinal_duration(chip, TPM1_ORD_CONTINUE_SELFTEST);
 
 	loops = jiffies_to_msecs(duration) / delay_msec;
 
@@ -808,9 +779,12 @@ int tpm_do_selftest(struct tpm_chip *chip)
 
 	do {
 		/* Attempt to read a PCR value */
-		cmd.header.in = pcrread_header;
+		cmd.header.in.tag = TPM_TAG_RQU_COMMAND;
+		cmd.header.in.length = sizeof(struct tpm_input_header) +
+				       sizeof(struct tpm_pcrread_in);
+		cmd.header.in.ordinal = TPM1_ORD_PCRREAD;
 		cmd.params.pcrread_in.pcr_idx = cpu_to_be32(0);
-		rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE);
+		rc = tpm_transmit(chip, (u8 *) &cmd, sizeof(cmd));
 		/* Some buggy TPMs will not respond to tpm_tis_ready() for
 		 * around 300ms while the self test is ongoing, keep trying
 		 * until the self test duration expires. */
@@ -920,13 +894,12 @@ again:
 }
 EXPORT_SYMBOL_GPL(wait_for_tpm_stat);
 
-#define TPM_ORD_SAVESTATE cpu_to_be32(152)
 #define SAVESTATE_RESULT_SIZE 10
 
 static struct tpm_input_header savestate_header = {
 	.tag = TPM_TAG_RQU_COMMAND,
 	.length = cpu_to_be32(10),
-	.ordinal = TPM_ORD_SAVESTATE
+	.ordinal = TPM1_ORD_SAVESTATE
 };
 
 /*
@@ -1009,7 +982,7 @@ EXPORT_SYMBOL_GPL(tpm_pm_resume);
 static struct tpm_input_header tpm_getrandom_header = {
 	.tag = TPM_TAG_RQU_COMMAND,
 	.length = cpu_to_be32(14),
-	.ordinal = TPM_ORD_GET_RANDOM
+	.ordinal = TPM1_ORD_GET_RANDOM
 };
 
 /**
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index 34e7fc7..48e30bd 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -101,7 +101,7 @@ static ssize_t pcrs_show(struct device *dev, struct device_attribute *attr,
 
 	num_pcrs = be32_to_cpu(cap.num_pcrs);
 	for (i = 0; i < num_pcrs; i++) {
-		rc = tpm_pcr_read_dev(chip, i, digest);
+		rc = tpm1_pcr_read(chip, i, digest);
 		if (rc)
 			break;
 		str += sprintf(str, "PCR-%02d: ", i);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index cd780c7..c991c91 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -65,6 +65,16 @@ enum tpm_duration {
 
 #define TPM_HEADER_SIZE		10
 
+enum tpm1_ordinals {
+	TPM1_ORD_PCR_EXTEND		= cpu_to_be32(20),
+	TPM1_ORD_PCRREAD		= cpu_to_be32(21),
+	TPM1_ORD_GET_RANDOM		= cpu_to_be32(70),
+	TPM1_ORD_CONTINUE_SELFTEST	= cpu_to_be32(83),
+	TPM1_ORD_GET_CAP		= cpu_to_be32(101),
+	TPM1_ORD_SAVESTATE		= cpu_to_be32(152),
+	TPM1_ORD_STARTUP		= cpu_to_be32(153),
+};
+
 enum tpm2_const {
 	TPM2_PLATFORM_PCR	= 24,
 	TPM2_PCR_SELECT_MIN	= ((TPM2_PLATFORM_PCR + 7) / 8),
@@ -511,7 +521,6 @@ extern void tpm_chip_unregister(struct tpm_chip *chip);
 int tpm_sysfs_add_device(struct tpm_chip *chip);
 void tpm_sysfs_del_device(struct tpm_chip *chip);
 
-int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
 
 #ifdef CONFIG_ACPI
 extern void tpm_add_ppi(struct tpm_chip *chip);
@@ -521,6 +530,12 @@ static inline void tpm_add_ppi(struct tpm_chip *chip)
 }
 #endif
 
+/* TPM1 commands */
+
+int tpm1_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
+
+/* TPM2 commands */
+
 int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
 int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
 int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
new file mode 100644
index 0000000..a4ac84f
--- /dev/null
+++ b/drivers/char/tpm/tpm1-cmd.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2004 IBM Corporation
+ * Copyright (C) 2014, 2016 Intel Corporation
+ *
+ * Authors:
+ * Leendert van Doorn <leendert-aZOuKsOsJu3MbYB6QlFGEg@public.gmane.org>
+ * Dave Safford <safford-aZOuKsOsJu3MbYB6QlFGEg@public.gmane.org>
+ * Reiner Sailer <sailer-aZOuKsOsJu3MbYB6QlFGEg@public.gmane.org>
+ * Kylene Hall <kjhall-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
+ *
+ * Maintained by: <tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
+ *
+ * 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.
+ *
+ * Note, the TPM chip is not interrupt driven (only polling)
+ * and can have very long timeouts (minutes!). Hence the unusual
+ * calls to msleep.
+ *
+ */
+
+#include "tpm.h"
+
+int tpm1_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
+{
+	int rc;
+	struct tpm_cmd_t cmd;
+
+	cmd.header.in.tag = TPM_TAG_RQU_COMMAND;
+	cmd.header.in.length = sizeof(struct tpm_input_header) +
+			       sizeof(struct tpm_pcrread_in);
+	cmd.header.in.ordinal = TPM1_ORD_PCRREAD;
+	cmd.params.pcrread_in.pcr_idx = cpu_to_be32(pcr_idx);
+	rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
+			      "attempting to read a pcr value");
+
+	if (rc == 0)
+		memcpy(res_buf, cmd.params.pcrread_out.pcr_result,
+		       TPM_DIGEST_SIZE);
+	return rc;
+}
-- 
2.7.3


------------------------------------------------------------------------------
Transform Data into Opportunity.
Accelerate data analysis in your applications with
Intel Data Analytics Acceleration Library.
Click to learn more.
http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140

^ permalink raw reply related	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2016-03-30 13:22 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-03-29 21:30 [PATCH] tpm: move tpm_pcr_read_dev() to tpm1-cmd.c Jarkko Sakkinen
     [not found] ` <1459287050-3809-1-git-send-email-jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2016-03-30 13:22   ` Jarkko Sakkinen

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).