diff mbox series

[v4,20/21] tpm1: reimplement tpm1_continue_selftest() using tpm_buf

Message ID 20180921135820.20549-21-tomas.winkler@intel.com (mailing list archive)
State New, archived
Headers show
Series tpm: separate tpm 1.x and tpm 2.x commands | expand

Commit Message

Winkler, Tomas Sept. 21, 2018, 1:58 p.m. UTC 
Reimplement tpm1_continue_selftest() using tpm_buf structure.
This is the last command using the old tpm_cmd_t structure
and now the structure can be removed.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
V3: New in the series.
V4: Resend.

 drivers/char/tpm/tpm.h      |  9 ---------
 drivers/char/tpm/tpm1-cmd.c | 21 ++++++++++-----------
 2 files changed, 10 insertions(+), 20 deletions(-)

Comments

Nayna Sept. 25, 2018, 10:23 a.m. UTC | #1 
On 09/21/2018 07:28 PM, Tomas Winkler wrote:
> Reimplement tpm1_continue_selftest() using tpm_buf structure.
> This is the last command using the old tpm_cmd_t structure
> and now the structure can be removed.
>
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> ---
> V3: New in the series.
> V4: Resend.
>
>   drivers/char/tpm/tpm.h      |  9 ---------
>   drivers/char/tpm/tpm1-cmd.c | 21 ++++++++++-----------
>   2 files changed, 10 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 2f06740f993d..7ada00f067f1 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -377,15 +377,6 @@ enum tpm_sub_capabilities {
>   	TPM_CAP_PROP_TIS_DURATION = 0x120,
>   };
>
> -typedef union {
> -	struct	tpm_input_header in;
> -	struct	tpm_output_header out;
> -} tpm_cmd_header;
> -
> -struct tpm_cmd_t {
> -	tpm_cmd_header	header;
> -} __packed;
> -
>
>   /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
>    * bytes, but 128 is still a relatively large number of random bytes and
> diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
> index cde9a01ad31f..6d7d70b0d130 100644
> --- a/drivers/char/tpm/tpm1-cmd.c
> +++ b/drivers/char/tpm/tpm1-cmd.c
> @@ -604,15 +604,8 @@ int tpm1_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
>   }
>
>   #define TPM_ORD_CONTINUE_SELFTEST 83
> -#define CONTINUE_SELFTEST_RESULT_SIZE 10
> -static const struct tpm_input_header continue_selftest_header = {
> -	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
> -	.length = cpu_to_be32(10),
> -	.ordinal = cpu_to_be32(TPM_ORD_CONTINUE_SELFTEST),
> -};
> -
>   /**
> - * tpm_continue_selftest -- run TPM's selftest
> + * tpm_continue_selftest() - run TPM's selftest
>    * @chip: TPM chip to use
>    *
>    * Returns 0 on success, < 0 in case of fatal error or a value > 0 representing
> @@ -620,12 +613,18 @@ static const struct tpm_input_header continue_selftest_header = {
>    */
>   static int tpm1_continue_selftest(struct tpm_chip *chip)
>   {
> +	struct tpm_buf buf;
>   	int rc;
> -	struct tpm_cmd_t cmd;
>
> -	cmd.header.in = continue_selftest_header;
> -	rc = tpm_transmit_cmd(chip, NULL, &cmd, CONTINUE_SELFTEST_RESULT_SIZE,
> +	rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_CONTINUE_SELFTEST);
> +	if (rc)
> +		return rc;
> +
> +	rc = tpm_transmit_cmd(chip, NULL, &buf.data, PAGE_SIZE,
I think this needs to buf.data instead of &buf.data

Thanks & Regards,
      - Nayna

>   			      0, 0, "continue selftest");
> +
> +	tpm_buf_destroy(&buf);
> +
>   	return rc;
>   }
>
Jarkko Sakkinen Sept. 25, 2018, 2:25 p.m. UTC | #2 
On Tue, 2018-09-25 at 15:53 +0530, Nayna Jain wrote:
> > +
> > +	rc = tpm_transmit_cmd(chip, NULL, &buf.data, PAGE_SIZE,
> 
> I think this needs to buf.data instead of &buf.data
> 
> Thanks & Regards,
>       - Nayna

You are absolutely right. Thank you.

/Jarkko
Jarkko Sakkinen Sept. 25, 2018, 2:28 p.m. UTC | #3 
On Tue, 2018-09-25 at 17:25 +0300, Jarkko Sakkinen wrote:
> On Tue, 2018-09-25 at 15:53 +0530, Nayna Jain wrote:
> > > +
> > > +	rc = tpm_transmit_cmd(chip, NULL, &buf.data, PAGE_SIZE,
> > 
> > I think this needs to buf.data instead of &buf.data
> > 
> > Thanks & Regards,
> >       - Nayna
> 
> You are absolutely right. Thank you.

Had to backtrack what I was doing wrong last time because the commit
has my tested-by and noticed that I did not have this one applied. I
tested this now by doing the change that you suggested and seems to
work.

/Jarkko
diff mbox series

Patch

diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 2f06740f993d..7ada00f067f1 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -377,15 +377,6 @@  enum tpm_sub_capabilities {
 	TPM_CAP_PROP_TIS_DURATION = 0x120,
 };
 
-typedef union {
-	struct	tpm_input_header in;
-	struct	tpm_output_header out;
-} tpm_cmd_header;
-
-struct tpm_cmd_t {
-	tpm_cmd_header	header;
-} __packed;
-
 
 /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
  * bytes, but 128 is still a relatively large number of random bytes and
diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
index cde9a01ad31f..6d7d70b0d130 100644
--- a/drivers/char/tpm/tpm1-cmd.c
+++ b/drivers/char/tpm/tpm1-cmd.c
@@ -604,15 +604,8 @@  int tpm1_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
 }
 
 #define TPM_ORD_CONTINUE_SELFTEST 83
-#define CONTINUE_SELFTEST_RESULT_SIZE 10
-static const struct tpm_input_header continue_selftest_header = {
-	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
-	.length = cpu_to_be32(10),
-	.ordinal = cpu_to_be32(TPM_ORD_CONTINUE_SELFTEST),
-};
-
 /**
- * tpm_continue_selftest -- run TPM's selftest
+ * tpm_continue_selftest() - run TPM's selftest
  * @chip: TPM chip to use
  *
  * Returns 0 on success, < 0 in case of fatal error or a value > 0 representing
@@ -620,12 +613,18 @@  static const struct tpm_input_header continue_selftest_header = {
  */
 static int tpm1_continue_selftest(struct tpm_chip *chip)
 {
+	struct tpm_buf buf;
 	int rc;
-	struct tpm_cmd_t cmd;
 
-	cmd.header.in = continue_selftest_header;
-	rc = tpm_transmit_cmd(chip, NULL, &cmd, CONTINUE_SELFTEST_RESULT_SIZE,
+	rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_CONTINUE_SELFTEST);
+	if (rc)
+		return rc;
+
+	rc = tpm_transmit_cmd(chip, NULL, &buf.data, PAGE_SIZE,
 			      0, 0, "continue selftest");
+
+	tpm_buf_destroy(&buf);
+
 	return rc;
 }