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Subject[PATCH v3 11/20] tpm: factor out tpm_startup function
Date
tpm manual startup is used only from within tpm1 or tpm2
code, hence remove tpm_startup function from tpm-interface.c
and add two static functions implementations tpm1_startup
and tpm2_startup into to tpm1-cmd.c and tpm2-cmd.c respectively.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
V2-V3: Rebase

drivers/char/tpm/tpm-interface.c | 41 ----------------------------------------
drivers/char/tpm/tpm.h | 1 -
drivers/char/tpm/tpm1-cmd.c | 37 +++++++++++++++++++++++++++++++++++-
drivers/char/tpm/tpm2-cmd.c | 34 +++++++++++++++++++++++++++++++--
4 files changed, 68 insertions(+), 45 deletions(-)

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 1ddf9d7e2069..3a2eef9e8665 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -403,47 +403,6 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
}
EXPORT_SYMBOL_GPL(tpm_transmit_cmd);

-#define TPM_ORD_STARTUP 153
-#define TPM_ST_CLEAR 1
-
-/**
- * tpm_startup - turn on the TPM
- * @chip: TPM chip to use
- *
- * Normally the firmware should start the TPM. This function is provided as a
- * workaround if this does not happen. A legal case for this could be for
- * example when a TPM emulator is used.
- *
- * Return: same as tpm_transmit_cmd()
- */
-int tpm_startup(struct tpm_chip *chip)
-{
- struct tpm_buf buf;
- int rc;
-
- dev_info(&chip->dev, "starting up the TPM manually\n");
-
- if (chip->flags & TPM_CHIP_FLAG_TPM2) {
- rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_STARTUP);
- if (rc < 0)
- return rc;
-
- tpm_buf_append_u16(&buf, TPM2_SU_CLEAR);
- } else {
- rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_STARTUP);
- if (rc < 0)
- return rc;
-
- tpm_buf_append_u16(&buf, TPM_ST_CLEAR);
- }
-
- rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0,
- "attempting to start the TPM");
-
- tpm_buf_destroy(&buf);
- return rc;
-}
-
int tpm_get_timeouts(struct tpm_chip *chip)
{
if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 862c9262e037..fa88102a0cab 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -540,7 +540,6 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
void *buf, size_t bufsiz,
size_t min_rsp_body_length, unsigned int flags,
const char *desc);
-int tpm_startup(struct tpm_chip *chip);
int tpm_get_timeouts(struct tpm_chip *);

int tpm1_pm_suspend(struct tpm_chip *chip, int tpm_suspend_pcr);
diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
index 5fdc44feea0f..f93776621e49 100644
--- a/drivers/char/tpm/tpm1-cmd.c
+++ b/drivers/char/tpm/tpm1-cmd.c
@@ -307,6 +307,40 @@ unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
return duration;
}

+#define TPM_ORD_STARTUP 153
+#define TPM_ST_CLEAR 1
+
+/**
+ * tpm_startup - turn on the TPM
+ * @chip: TPM chip to use
+ *
+ * Normally the firmware should start the TPM. This function is provided as a
+ * workaround if this does not happen. A legal case for this could be for
+ * example when a TPM emulator is used.
+ *
+ * Return: same as tpm_transmit_cmd()
+ */
+static int tpm1_startup(struct tpm_chip *chip)
+{
+ struct tpm_buf buf;
+ int rc;
+
+ dev_info(&chip->dev, "starting up the TPM manually\n");
+
+ rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_STARTUP);
+ if (rc < 0)
+ return rc;
+
+ tpm_buf_append_u16(&buf, TPM_ST_CLEAR);
+
+ rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0,
+ "attempting to start the TPM");
+
+ tpm_buf_destroy(&buf);
+
+ return rc;
+}
+
int tpm1_get_timeouts(struct tpm_chip *chip)
{
cap_t cap;
@@ -316,7 +350,7 @@ int tpm1_get_timeouts(struct tpm_chip *chip)
rc = tpm1_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap, NULL,
sizeof(cap.timeout));
if (rc == TPM_ERR_INVALID_POSTINIT) {
- if (tpm_startup(chip))
+ if (tpm1_startup(chip))
return rc;

rc = tpm1_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap,
@@ -721,3 +755,4 @@ int tpm1_pm_suspend(struct tpm_chip *chip, int tpm_suspend_pcr)

return rc;
}
+
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 4ca0555f23c8..333631eab4c7 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -943,6 +943,36 @@ static int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip)
return rc;
}

+/**
+ * tpm2_startup - turn on the TPM
+ * @chip: TPM chip to use
+ *
+ * Normally the firmware should start the TPM. This function is provided as a
+ * workaround if this does not happen. A legal case for this could be for
+ * example when a TPM emulator is used.
+ *
+ * Return: same as tpm_transmit_cmd()
+ */
+
+static int tpm2_startup(struct tpm_chip *chip)
+{
+ struct tpm_buf buf;
+ int rc;
+
+ dev_info(&chip->dev, "starting up the TPM manually\n");
+
+ rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_STARTUP);
+ if (rc < 0)
+ return rc;
+
+ tpm_buf_append_u16(&buf, TPM2_SU_CLEAR);
+ rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0,
+ "attempting to start the TPM");
+ tpm_buf_destroy(&buf);
+
+ return rc;
+}
+
/**
* tpm2_auto_startup - Perform the standard automatic TPM initialization
* sequence
@@ -954,7 +984,7 @@ int tpm2_auto_startup(struct tpm_chip *chip)
{
int rc;

- rc = tpm_get_timeouts(chip);
+ rc = tpm2_get_timeouts(chip);
if (rc)
goto out;

@@ -963,7 +993,7 @@ int tpm2_auto_startup(struct tpm_chip *chip)
goto out;

if (rc == TPM2_RC_INITIALIZE) {
- rc = tpm_startup(chip);
+ rc = tpm2_startup(chip);
if (rc)
goto out;

--
2.14.4
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