Re: [PATCH v4 03/21] tpm: factor out tpm 1.x duration calculation to tpm1-cmd.c

From: Jarkko Sakkinen
Date: Tue Sep 25 2018 - 10:17:30 EST

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On Fri, 2018-09-21 at 16:58 +0300, Tomas Winkler wrote:
> Factor out TPM 1.x commands calculation into tpm1-cmd.c file.
> and change the prefix from tpm_ to tpm1_.
> No functional change is done here.
>
> Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
> ---
> V2-V3: Rebase
> V4: 1. Remove the licence statement it's already covered by SPDX.
> 2. Add kdoc to tpm1_calc_ordinal_duration().
>
> drivers/char/tpm/Makefile | 1 +
> drivers/char/tpm/st33zp24/st33zp24.c | 2 +-
> drivers/char/tpm/tpm-interface.c | 284 +-------------------------------
> drivers/char/tpm/tpm.h | 2 +-
> drivers/char/tpm/tpm1-cmd.c | 310
> +++++++++++++++++++++++++++++++++++
> drivers/char/tpm/tpm_i2c_nuvoton.c | 10 +-
> drivers/char/tpm/tpm_tis_core.c | 2 +-
> drivers/char/tpm/xen-tpmfront.c | 2 +-
> 8 files changed, 322 insertions(+), 291 deletions(-)
> create mode 100644 drivers/char/tpm/tpm1-cmd.c
>
> diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
> index efc785053627..a01c4cab902a 100644
> --- a/drivers/char/tpm/Makefile
> +++ b/drivers/char/tpm/Makefile
> @@ -7,6 +7,7 @@ tpm-y := tpm-chip.o
> tpm-y += tpm-dev-common.o
> tpm-y += tpm-dev.o
> tpm-y += tpm-interface.o
> +tpm-y += tpm1-cmd.o
> tpm-y += tpm2-cmd.o
> tpm-y += tpmrm-dev.o
> tpm-y += tpm2-space.o
> diff --git a/drivers/char/tpm/st33zp24/st33zp24.c
> b/drivers/char/tpm/st33zp24/st33zp24.c
> index abd675bec88c..16be974955ea 100644
> --- a/drivers/char/tpm/st33zp24/st33zp24.c
> +++ b/drivers/char/tpm/st33zp24/st33zp24.c
> @@ -430,7 +430,7 @@ static int st33zp24_send(struct tpm_chip *chip, unsigned
> char *buf,
> ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
>
> ret = wait_for_stat(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
> - tpm_calc_ordinal_duration(chip, ordinal),
> + tpm1_calc_ordinal_duration(chip, ordinal),
> &tpm_dev->read_queue, false);
> if (ret < 0)
> goto out_err;
> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-
> interface.c
> index 129f640424b7..bb3eed907c72 100644
> --- a/drivers/char/tpm/tpm-interface.c
> +++ b/drivers/char/tpm/tpm-interface.c
> @@ -33,7 +33,6 @@
>
> #include "tpm.h"
>
> -#define TPM_MAX_ORDINAL 243
> #define TSC_MAX_ORDINAL 12
> #define TPM_PROTECTED_COMMAND 0x00
> #define TPM_CONNECTION_COMMAND 0x40
> @@ -48,285 +47,6 @@ module_param_named(suspend_pcr, tpm_suspend_pcr, uint,
> 0644);
> MODULE_PARM_DESC(suspend_pcr,
> "PCR to use for dummy writes to facilitate flush on
> suspend.");
>
> -/*
> - * Array with one entry per ordinal defining the maximum amount
> - * of time the chip could take to return the result. The ordinal
> - * designation of short, medium or long is defined in a table in
> - * TCG Specification TPM Main Part 2 TPM Structures Section 17. 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 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
> - TPM_UNDEFINED, /* 0 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 5 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 10 */
> - TPM_SHORT,
> - TPM_MEDIUM,
> - TPM_LONG,
> - TPM_LONG,
> - TPM_MEDIUM, /* 15 */
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_MEDIUM,
> - TPM_LONG,
> - TPM_SHORT, /* 20 */
> - TPM_SHORT,
> - TPM_MEDIUM,
> - TPM_MEDIUM,
> - TPM_MEDIUM,
> - TPM_SHORT, /* 25 */
> - TPM_SHORT,
> - TPM_MEDIUM,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_MEDIUM, /* 30 */
> - TPM_LONG,
> - TPM_MEDIUM,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT, /* 35 */
> - TPM_MEDIUM,
> - TPM_MEDIUM,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_MEDIUM, /* 40 */
> - TPM_LONG,
> - TPM_MEDIUM,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT, /* 45 */
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_LONG,
> - TPM_MEDIUM, /* 50 */
> - TPM_MEDIUM,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 55 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_MEDIUM, /* 60 */
> - TPM_MEDIUM,
> - TPM_MEDIUM,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_MEDIUM, /* 65 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 70 */
> - TPM_SHORT,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 75 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_LONG, /* 80 */
> - TPM_UNDEFINED,
> - TPM_MEDIUM,
> - TPM_LONG,
> - TPM_SHORT,
> - TPM_UNDEFINED, /* 85 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 90 */
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_UNDEFINED, /* 95 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_MEDIUM, /* 100 */
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 105 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 110 */
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT, /* 115 */
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_LONG, /* 120 */
> - TPM_LONG,
> - TPM_MEDIUM,
> - TPM_UNDEFINED,
> - TPM_SHORT,
> - TPM_SHORT, /* 125 */
> - TPM_SHORT,
> - TPM_LONG,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT, /* 130 */
> - TPM_MEDIUM,
> - TPM_UNDEFINED,
> - TPM_SHORT,
> - TPM_MEDIUM,
> - TPM_UNDEFINED, /* 135 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 140 */
> - TPM_SHORT,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 145 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 150 */
> - TPM_MEDIUM,
> - TPM_MEDIUM,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_UNDEFINED, /* 155 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 160 */
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 165 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_LONG, /* 170 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 175 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_MEDIUM, /* 180 */
> - TPM_SHORT,
> - TPM_MEDIUM,
> - TPM_MEDIUM,
> - TPM_MEDIUM,
> - TPM_MEDIUM, /* 185 */
> - TPM_SHORT,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 190 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 195 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 200 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT,
> - TPM_SHORT, /* 205 */
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_MEDIUM, /* 210 */
> - TPM_UNDEFINED,
> - TPM_MEDIUM,
> - TPM_MEDIUM,
> - TPM_MEDIUM,
> - TPM_UNDEFINED, /* 215 */
> - TPM_MEDIUM,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT,
> - TPM_SHORT, /* 220 */
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_SHORT,
> - TPM_UNDEFINED, /* 225 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 230 */
> - TPM_LONG,
> - TPM_MEDIUM,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED, /* 235 */
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_UNDEFINED,
> - TPM_SHORT, /* 240 */
> - TPM_UNDEFINED,
> - TPM_MEDIUM,
> -};
> -
> -/*
> - * Returns max number of jiffies to wait
> - */
> -unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
> - u32 ordinal)
> -{
> - int duration_idx = TPM_UNDEFINED;
> - int duration = 0;
> -
> - /*
> - * We only have a duration table for protected commands, where the
> upper
> - * 16 bits are 0. For the few other ordinals the fallback will be
> used.
> - */
> - if (ordinal < TPM_MAX_ORDINAL)
> - duration_idx = tpm_ordinal_duration[ordinal];
> -
> - if (duration_idx != TPM_UNDEFINED)
> - duration = chip->duration[duration_idx];
> - if (duration <= 0)
> - return 2 * 60 * HZ;
> - else
> - return duration;
> -}
> -EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration);
> -
> static int tpm_validate_command(struct tpm_chip *chip,
> struct tpm_space *space,
> const u8 *cmd,
> @@ -503,7 +223,7 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
> if (chip->flags & TPM_CHIP_FLAG_TPM2)
> stop = jiffies + tpm2_calc_ordinal_duration(chip, ordinal);
> else
> - stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
> + stop = jiffies + tpm1_calc_ordinal_duration(chip, ordinal);
> do {
> u8 status = chip->ops->status(chip);
> if ((status & chip->ops->req_complete_mask) ==
> @@ -1086,7 +806,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
> unsigned long duration;
> u8 dummy[TPM_DIGEST_SIZE];
>
> - duration = tpm_calc_ordinal_duration(chip,
> TPM_ORD_CONTINUE_SELFTEST);
> + duration = tpm1_calc_ordinal_duration(chip,
> TPM_ORD_CONTINUE_SELFTEST);
>
> loops = jiffies_to_msecs(duration) / delay_msec;
>
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 0f08518b525d..c59d2c20c339 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -546,7 +546,7 @@ ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id,
> cap_t *cap,
> int tpm_get_timeouts(struct tpm_chip *);
> int tpm1_auto_startup(struct tpm_chip *chip);
> int tpm_do_selftest(struct tpm_chip *chip);
> -unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
> +unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
> int tpm_pm_suspend(struct device *dev);
> int tpm_pm_resume(struct device *dev);
>
> diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
> new file mode 100644
> index 000000000000..7d14196de6eb
> --- /dev/null
> +++ b/drivers/char/tpm/tpm1-cmd.c
> @@ -0,0 +1,310 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2004 IBM Corporation
> + * Copyright (C) 2014 Intel Corporation
> + *
> + * Authors:
> + * Leendert van Doorn <leendert@xxxxxxxxxxxxxx>
> + * Dave Safford <safford@xxxxxxxxxxxxxx>
> + * Reiner Sailer <sailer@xxxxxxxxxxxxxx>
> + * Kylene Hall <kjhall@xxxxxxxxxx>
> + *
> + * Device driver for TCG/TCPA TPM (trusted platform module).
> + * Specifications at www.trustedcomputinggroup.org
> + */
> +
> +#include <linux/poll.h>
> +#include <linux/slab.h>
> +#include <linux/mutex.h>
> +#include <linux/spinlock.h>
> +#include <linux/freezer.h>
> +#include <linux/tpm_eventlog.h>
> +
> +#include "tpm.h"
> +
> +#define TPM_MAX_ORDINAL 243
> +
> +/*
> + * Array with one entry per ordinal defining the maximum amount
> + * of time the chip could take to return the result. The ordinal
> + * designation of short, medium or long is defined in a table in
> + * TCG Specification TPM Main Part 2 TPM Structures Section 17. 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 tpm1_ordinal_duration[TPM_MAX_ORDINAL] = {
> + TPM_UNDEFINED, /* 0 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 5 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 10 */
> + TPM_SHORT,
> + TPM_MEDIUM,
> + TPM_LONG,
> + TPM_LONG,
> + TPM_MEDIUM, /* 15 */
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_MEDIUM,
> + TPM_LONG,
> + TPM_SHORT, /* 20 */
> + TPM_SHORT,
> + TPM_MEDIUM,
> + TPM_MEDIUM,
> + TPM_MEDIUM,
> + TPM_SHORT, /* 25 */
> + TPM_SHORT,
> + TPM_MEDIUM,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_MEDIUM, /* 30 */
> + TPM_LONG,
> + TPM_MEDIUM,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT, /* 35 */
> + TPM_MEDIUM,
> + TPM_MEDIUM,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_MEDIUM, /* 40 */
> + TPM_LONG,
> + TPM_MEDIUM,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT, /* 45 */
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_LONG,
> + TPM_MEDIUM, /* 50 */
> + TPM_MEDIUM,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 55 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_MEDIUM, /* 60 */
> + TPM_MEDIUM,
> + TPM_MEDIUM,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_MEDIUM, /* 65 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 70 */
> + TPM_SHORT,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 75 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_LONG, /* 80 */
> + TPM_UNDEFINED,
> + TPM_MEDIUM,
> + TPM_LONG,
> + TPM_SHORT,
> + TPM_UNDEFINED, /* 85 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 90 */
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_UNDEFINED, /* 95 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_MEDIUM, /* 100 */
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 105 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 110 */
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT, /* 115 */
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_LONG, /* 120 */
> + TPM_LONG,
> + TPM_MEDIUM,
> + TPM_UNDEFINED,
> + TPM_SHORT,
> + TPM_SHORT, /* 125 */
> + TPM_SHORT,
> + TPM_LONG,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT, /* 130 */
> + TPM_MEDIUM,
> + TPM_UNDEFINED,
> + TPM_SHORT,
> + TPM_MEDIUM,
> + TPM_UNDEFINED, /* 135 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 140 */
> + TPM_SHORT,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 145 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 150 */
> + TPM_MEDIUM,
> + TPM_MEDIUM,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_UNDEFINED, /* 155 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 160 */
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 165 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_LONG, /* 170 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 175 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_MEDIUM, /* 180 */
> + TPM_SHORT,
> + TPM_MEDIUM,
> + TPM_MEDIUM,
> + TPM_MEDIUM,
> + TPM_MEDIUM, /* 185 */
> + TPM_SHORT,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 190 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 195 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 200 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT,
> + TPM_SHORT, /* 205 */
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_MEDIUM, /* 210 */
> + TPM_UNDEFINED,
> + TPM_MEDIUM,
> + TPM_MEDIUM,
> + TPM_MEDIUM,
> + TPM_UNDEFINED, /* 215 */
> + TPM_MEDIUM,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT,
> + TPM_SHORT, /* 220 */
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_SHORT,
> + TPM_UNDEFINED, /* 225 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 230 */
> + TPM_LONG,
> + TPM_MEDIUM,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED, /* 235 */
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_UNDEFINED,
> + TPM_SHORT, /* 240 */
> + TPM_UNDEFINED,
> + TPM_MEDIUM,
> +};
> +
> +/**
> + * tpm1_calc_ordinal_duration() - returns the maximum amount of time
> + * the chip could take to return the result for a particular ordinal
> + * in jiffies.
> + *
> + * @chip: TPM chip to use.
> + * @ordinal: TPM command ordinal.
> + *
> + * Return: A maxiaml duration time for an ordinal in jiffies.
> + */
> +unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
> +{
> + int duration_idx = TPM_UNDEFINED;
> + int duration = 0;
> +
> + /*
> + * We only have a duration table for protected commands, where the
> upper
> + * 16 bits are 0. For the few other ordinals the fallback will be
> used.
> + */
> + if (ordinal < TPM_MAX_ORDINAL)
> + duration_idx = tpm1_ordinal_duration[ordinal];
> +
> + if (duration_idx != TPM_UNDEFINED)
> + duration = chip->duration[duration_idx];
> + if (duration <= 0)
> + return 2 * 60 * HZ;
> + else
> + return duration;
> +}
> +EXPORT_SYMBOL_GPL(tpm1_calc_ordinal_duration);
> diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c
> b/drivers/char/tpm/tpm_i2c_nuvoton.c
> index caa86b19c76d..5d20e98b844f 100644
> --- a/drivers/char/tpm/tpm_i2c_nuvoton.c
> +++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
> @@ -370,6 +370,7 @@ static int i2c_nuvoton_send(struct tpm_chip *chip, u8
> *buf, size_t len)
> struct i2c_client *client = to_i2c_client(dev);
> u32 ordinal;
> size_t count = 0;
> + unsigned long duration;
> int burst_count, bytes2write, retries, rc = -EIO;
>
> for (retries = 0; retries < TPM_RETRY; retries++) {
> @@ -455,12 +456,11 @@ static int i2c_nuvoton_send(struct tpm_chip *chip, u8
> *buf, size_t len)
> return rc;
> }
> ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
> - rc = i2c_nuvoton_wait_for_data_avail(chip,
> - tpm_calc_ordinal_duration(chip,
> - ordina
> l),
> - &priv->read_queue);
> + duration = tpm1_calc_ordinal_duration(chip, ordinal);
> + rc = i2c_nuvoton_wait_for_data_avail(chip, duration, &priv-
> >read_queue);
> if (rc) {
> - dev_err(dev, "%s() timeout command duration\n", __func__);
> + dev_err(dev, "%s() timeout command duration %ld\n",
> + __func__, duration);
> i2c_nuvoton_ready(chip);
> return rc;
> }
> diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
> index d2345d9fd7b5..14c332104de4 100644
> --- a/drivers/char/tpm/tpm_tis_core.c
> +++ b/drivers/char/tpm/tpm_tis_core.c
> @@ -476,7 +476,7 @@ static int tpm_tis_send_main(struct tpm_chip *chip, const
> u8 *buf, size_t len)
> if (chip->flags & TPM_CHIP_FLAG_TPM2)
> dur = tpm2_calc_ordinal_duration(chip, ordinal);
> else
> - dur = tpm_calc_ordinal_duration(chip, ordinal);
> + dur = tpm1_calc_ordinal_duration(chip, ordinal);
>
> if (wait_for_tpm_stat
> (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, dur,
> diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
> index b150f87f38f5..77097229bf49 100644
> --- a/drivers/char/tpm/xen-tpmfront.c
> +++ b/drivers/char/tpm/xen-tpmfront.c
> @@ -164,7 +164,7 @@ static int vtpm_send(struct tpm_chip *chip, u8 *buf,
> size_t count)
> notify_remote_via_evtchn(priv->evtchn);
>
> ordinal = be32_to_cpu(((struct tpm_input_header*)buf)->ordinal);
> - duration = tpm_calc_ordinal_duration(chip, ordinal);
> + duration = tpm1_calc_ordinal_duration(chip, ordinal);
>
> if (wait_for_tpm_stat(chip, VTPM_STATUS_IDLE, duration,
> &priv->read_queue, true) < 0) {

The stuff that I said about function header comments applies also here.
Other than that I do not see anything alarming.

/Jarkko

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