From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Ed Swierk <eswierk@skyportsystems.com>
Cc: tpmdd-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
jgunthorpe@obsidianresearch.com, stefanb@us.ibm.com
Subject: Re: [PATCH v9 3/5] tpm: Clean up reading of timeout and duration capabilities
Date: Mon, 18 Jul 2016 21:15:47 +0300 [thread overview]
Message-ID: <20160718181547.GD31463@intel.com> (raw)
In-Reply-To: <1468426776-42762-4-git-send-email-eswierk@skyportsystems.com>
On Wed, Jul 13, 2016 at 09:19:34AM -0700, Ed Swierk wrote:
> Call tpm_getcap() from tpm_get_timeouts() to eliminate redundant
> code. Return all errors to the caller rather than swallowing them
> (e.g. when tpm_transmit_cmd() returns nonzero).
>
> Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
/Jarkko
> ---
> drivers/char/tpm/tpm-interface.c | 74 +++++++++++++++-------------------------
> 1 file changed, 27 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> index a4beb53..dc492ee 100644
> --- a/drivers/char/tpm/tpm-interface.c
> +++ b/drivers/char/tpm/tpm-interface.c
> @@ -460,9 +460,19 @@ ssize_t tpm_getcap(struct tpm_chip *chip, __be32 subcap_id, cap_t *cap,
> tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
> tpm_cmd.params.getcap_in.subcap = subcap_id;
> }
> +
> rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc);
> +
> + if (!rc &&
> + ((subcap_id == TPM_CAP_PROP_TIS_TIMEOUT &&
> + be32_to_cpu(tpm_cmd.header.out.length) != TPM_HEADER_SIZE + 20) ||
> + (subcap_id == TPM_CAP_PROP_TIS_DURATION &&
> + be32_to_cpu(tpm_cmd.header.out.length) != TPM_HEADER_SIZE + 16)))
> + rc = -EINVAL;
> +
> if (!rc)
> *cap = tpm_cmd.params.getcap_out.cap;
> +
> return rc;
> }
>
> @@ -503,10 +513,9 @@ static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
>
> int tpm_get_timeouts(struct tpm_chip *chip)
> {
> - struct tpm_cmd_t tpm_cmd;
> + cap_t cap;
> unsigned long new_timeout[4];
> unsigned long old_timeout[4];
> - struct duration_t *duration_cap;
> ssize_t rc;
>
> if (chip->flags & TPM_CHIP_FLAG_TPM2) {
> @@ -524,42 +533,25 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> return 0;
> }
>
> - tpm_cmd.header.in = tpm_getcap_header;
> - tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
> - tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
> - tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
> - rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
> -
> + rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap,
> + "attempting to determine the timeouts");
> if (rc == TPM_ERR_INVALID_POSTINIT) {
> /* The TPM is not started, we are the first to talk to it.
> Execute a startup command. */
> - dev_info(&chip->dev, "Issuing TPM_STARTUP");
> + dev_info(&chip->dev, "Issuing TPM_STARTUP\n");
> if (tpm_startup(chip, TPM_ST_CLEAR))
> return rc;
>
> - tpm_cmd.header.in = tpm_getcap_header;
> - tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
> - tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
> - tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
> - rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
> - NULL);
> - }
> - if (rc) {
> - dev_err(&chip->dev,
> - "A TPM error (%zd) occurred attempting to determine the timeouts\n",
> - rc);
> - goto duration;
> + rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap,
> + "attempting to determine the timeouts");
> }
> + if (rc)
> + return rc;
>
> - if (be32_to_cpu(tpm_cmd.header.out.return_code) != 0 ||
> - be32_to_cpu(tpm_cmd.header.out.length)
> - != sizeof(tpm_cmd.header.out) + sizeof(u32) + 4 * sizeof(u32))
> - return -EINVAL;
> -
> - old_timeout[0] = be32_to_cpu(tpm_cmd.params.getcap_out.cap.timeout.a);
> - old_timeout[1] = be32_to_cpu(tpm_cmd.params.getcap_out.cap.timeout.b);
> - old_timeout[2] = be32_to_cpu(tpm_cmd.params.getcap_out.cap.timeout.c);
> - old_timeout[3] = be32_to_cpu(tpm_cmd.params.getcap_out.cap.timeout.d);
> + old_timeout[0] = be32_to_cpu(cap.timeout.a);
> + old_timeout[1] = be32_to_cpu(cap.timeout.b);
> + old_timeout[2] = be32_to_cpu(cap.timeout.c);
> + old_timeout[3] = be32_to_cpu(cap.timeout.d);
> memcpy(new_timeout, old_timeout, sizeof(new_timeout));
>
> /*
> @@ -597,29 +589,17 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> chip->timeout_c = usecs_to_jiffies(new_timeout[2]);
> chip->timeout_d = usecs_to_jiffies(new_timeout[3]);
>
> -duration:
> - tpm_cmd.header.in = tpm_getcap_header;
> - tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
> - tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
> - tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_DURATION;
> -
> - rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
> - "attempting to determine the durations");
> + rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_DURATION, &cap,
> + "attempting to determine the durations");
> if (rc)
> return rc;
>
> - if (be32_to_cpu(tpm_cmd.header.out.return_code) != 0 ||
> - be32_to_cpu(tpm_cmd.header.out.length)
> - != sizeof(tpm_cmd.header.out) + sizeof(u32) + 3 * sizeof(u32))
> - return -EINVAL;
> -
> - duration_cap = &tpm_cmd.params.getcap_out.cap.duration;
> chip->duration[TPM_SHORT] =
> - usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_short));
> + usecs_to_jiffies(be32_to_cpu(cap.duration.tpm_short));
> chip->duration[TPM_MEDIUM] =
> - usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_medium));
> + usecs_to_jiffies(be32_to_cpu(cap.duration.tpm_medium));
> chip->duration[TPM_LONG] =
> - usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_long));
> + usecs_to_jiffies(be32_to_cpu(cap.duration.tpm_long));
>
> /* The Broadcom BCM0102 chipset in a Dell Latitude D820 gets the above
> * value wrong and apparently reports msecs rather than usecs. So we
> --
> 1.9.1
>
next prev parent reply other threads:[~2016-07-18 18:15 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-08 0:45 [PATCH v4 0/4] tpm: Command duration logging and chip-specific override Ed Swierk
2016-06-08 0:45 ` [PATCH v4 1/4] tpm_tis: Improve reporting of IO errors Ed Swierk
2016-06-08 0:45 ` [PATCH v4 2/4] tpm: Add optional logging of TPM command durations Ed Swierk
2016-06-08 0:45 ` [PATCH v4 3/4] tpm: Allow TPM chip drivers to override reported " Ed Swierk
2016-06-08 19:05 ` [tpmdd-devel] " Jason Gunthorpe
2016-06-08 20:41 ` Ed Swierk
2016-06-08 0:45 ` [PATCH v4 4/4] tpm_tis: Increase ST19NP18 TPM command duration to avoid chip lockup Ed Swierk
2016-06-08 23:00 ` [PATCH v5 0/4] tpm: Command duration logging and chip-specific override Ed Swierk
2016-06-08 23:00 ` [PATCH v5 1/4] tpm_tis: Improve reporting of IO errors Ed Swierk
2016-06-08 23:00 ` [PATCH v5 2/4] tpm: Add optional logging of TPM command durations Ed Swierk
2016-06-08 23:00 ` [PATCH v5 3/4] tpm: Allow TPM chip drivers to override reported " Ed Swierk
2016-06-10 12:19 ` Jarkko Sakkinen
2016-06-10 17:34 ` Ed Swierk
2016-06-10 19:42 ` Jarkko Sakkinen
2016-06-11 1:54 ` Ed Swierk
2016-06-08 23:00 ` [PATCH v5 4/4] tpm_tis: Increase ST19NP18 TPM command duration to avoid chip lockup Ed Swierk
2016-06-11 1:55 ` [PATCH v6 0/5] tpm: Command duration logging and chip-specific override Ed Swierk
2016-06-11 1:55 ` [PATCH v6 1/5] tpm_tis: Improve reporting of IO errors Ed Swierk
2016-06-11 1:55 ` [PATCH v6 2/5] tpm: Add optional logging of TPM command durations Ed Swierk
2016-06-11 1:55 ` [PATCH v6 3/5] tpm: Factor out reading of timeout and duration capabilities Ed Swierk
2016-06-16 20:20 ` Jarkko Sakkinen
2016-06-19 12:12 ` Jarkko Sakkinen
2016-06-11 1:55 ` [PATCH v6 4/5] tpm: Allow TPM chip drivers to override reported command durations Ed Swierk
2016-06-16 20:26 ` Jarkko Sakkinen
2016-06-11 1:55 ` [PATCH v6 5/5] tpm_tis: Increase ST19NP18 TPM command duration to avoid chip lockup Ed Swierk
2016-06-21 1:53 ` [PATCH v7 0/5] tpm: Command duration logging and chip-specific override Ed Swierk
2016-06-21 1:53 ` [PATCH v7 1/5] tpm_tis: Improve reporting of IO errors Ed Swierk
2016-06-21 1:53 ` [PATCH v7 2/5] tpm: Add optional logging of TPM command durations Ed Swierk
2016-06-21 1:54 ` [PATCH v7 3/5] tpm: Clean up reading of timeout and duration capabilities Ed Swierk
2016-06-21 20:52 ` Jarkko Sakkinen
2016-06-22 0:21 ` Ed Swierk
2016-06-22 10:46 ` Jarkko Sakkinen
2016-06-21 1:54 ` [PATCH v7 4/5] tpm: Allow TPM chip drivers to override reported command durations Ed Swierk
2016-06-21 20:54 ` Jarkko Sakkinen
2016-06-21 1:54 ` [PATCH v7 5/5] tpm_tis: Increase ST19NP18 TPM command duration to avoid chip lockup Ed Swierk
2016-06-21 20:55 ` Jarkko Sakkinen
2016-06-22 1:10 ` [PATCH v8 0/5] tpm: Command duration logging and chip-specific override Ed Swierk
2016-06-22 1:10 ` [PATCH v8 1/5] tpm_tis: Improve reporting of IO errors Ed Swierk
2016-06-24 18:25 ` Jason Gunthorpe
2016-06-24 20:21 ` Jarkko Sakkinen
2016-06-24 20:23 ` Jarkko Sakkinen
2016-06-24 20:26 ` Jason Gunthorpe
2016-06-25 15:24 ` Jarkko Sakkinen
2016-06-25 15:47 ` Jarkko Sakkinen
2016-06-27 17:55 ` Jason Gunthorpe
2016-06-22 1:10 ` [PATCH v8 2/5] tpm: Add optional logging of TPM command durations Ed Swierk
2016-06-24 18:27 ` Jason Gunthorpe
2016-06-24 20:24 ` Jarkko Sakkinen
2016-06-22 1:10 ` [PATCH v8 3/5] tpm: Clean up reading of timeout and duration capabilities Ed Swierk
2016-06-22 1:10 ` [PATCH v8 4/5] tpm: Allow TPM chip drivers to override reported command durations Ed Swierk
2016-06-22 1:10 ` [PATCH v8 5/5] tpm_tis: Increase ST19NP18 TPM command duration to avoid chip lockup Ed Swierk
2016-07-13 16:19 ` [PATCH v9 0/5] tpm: Command duration logging and chip-specific override Ed Swierk
2016-07-13 16:19 ` [PATCH v9 1/5] tpm_tis: Improve reporting of IO errors Ed Swierk
2016-07-13 16:19 ` [PATCH v9 2/5] tpm: Add optional logging of TPM command durations Ed Swierk
2016-07-13 16:19 ` [PATCH v9 3/5] tpm: Clean up reading of timeout and duration capabilities Ed Swierk
2016-07-18 18:15 ` Jarkko Sakkinen [this message]
2016-07-18 18:19 ` Jarkko Sakkinen
2016-07-18 18:20 ` Jarkko Sakkinen
2016-07-13 16:19 ` [PATCH v9 4/5] tpm: Allow TPM chip drivers to override reported command durations Ed Swierk
2016-07-13 17:04 ` kbuild test robot
2016-07-18 18:40 ` Jarkko Sakkinen
2016-07-13 16:19 ` [PATCH v9 5/5] tpm_tis: Increase ST19NP18 TPM command duration to avoid chip lockup Ed Swierk
2016-07-13 16:44 ` [PATCH v9 0/5] tpm: Command duration logging and chip-specific override Ed Swierk
2016-07-13 17:36 ` Jason Gunthorpe
2016-07-13 20:00 ` Ed Swierk
2016-07-13 20:58 ` Eric W. Biederman
2016-07-13 20:59 ` Jason Gunthorpe
2016-07-18 18:07 ` Jarkko Sakkinen
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