Re: 0001-added-tpm-2.0-support-to-nuvoton-i2c-driver.patch

[Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>]

On Tue, Apr 19, 2016 at 08:04:42AM +0300, Andrew Zamansky (NTIL) wrote:
> >From b1503617a4c2b89f5a366a3d38b303b5de606c59 Mon Sep 17 00:00:00 2001
> From: andrew azmansky <andrew.zamansky-KrzQf0k3Iz9BDgjK7y7TUQ@public.gmane.org>
> Date: Thu, 7 Apr 2016 09:19:57 +0300
> Subject: [PATCH 1/1] added tpm 2.0 support to nuvoton i2c driver
> 
> add tpm 2.0 support to nuvoton i2c tpm driver

Lets not keep duplicating this.

Can you test and use this patch as a pre-requsit for your nuvoton
change?

>From c8e65751b3b9e9337277291cd6bda278ed71939f Mon Sep 17 00:00:00 2001
From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
Date: Tue, 19 Apr 2016 15:06:55 -0600
Subject: [PATCH] tpm: Factor out common startup code

Provide some flags in tpm_class_ops to allow drivers to opt-in to the
common startup sequence. This is the sequence used by tpm_tis and
tpm_crb.

All drivers should set this flag.

Signed-off-by: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
---
 drivers/char/tpm/st33zp24/st33zp24.c |  4 +---
 drivers/char/tpm/tpm-chip.c          | 15 ++++++++++++++
 drivers/char/tpm/tpm-interface.c     | 27 ++++++++++++++++++++++++
 drivers/char/tpm/tpm.h               |  2 ++
 drivers/char/tpm/tpm2-cmd.c          | 40 ++++++++++++++++++++++++++++++++++++
 drivers/char/tpm/tpm_crb.c           | 10 +--------
 drivers/char/tpm/tpm_i2c_atmel.c     |  6 +-----
 drivers/char/tpm/tpm_i2c_infineon.c  |  4 +---
 drivers/char/tpm/tpm_i2c_nuvoton.c   |  7 +------
 drivers/char/tpm/tpm_tis.c           | 24 +---------------------
 include/linux/tpm.h                  |  6 ++++++
 11 files changed, 96 insertions(+), 49 deletions(-)

diff --git a/drivers/char/tpm/st33zp24/st33zp24.c b/drivers/char/tpm/st33zp24/st33zp24.c
index a7c99a284724..c2ee30451e41 100644
--- a/drivers/char/tpm/st33zp24/st33zp24.c
+++ b/drivers/char/tpm/st33zp24/st33zp24.c
@@ -505,6 +505,7 @@ static bool st33zp24_req_canceled(struct tpm_chip *chip, u8 status)
 }
 
 static const struct tpm_class_ops st33zp24_tpm = {
+	.flags = TPM_OPS_AUTO_STARTUP,
 	.send = st33zp24_send,
 	.recv = st33zp24_recv,
 	.cancel = st33zp24_cancel,
@@ -592,9 +593,6 @@ int st33zp24_probe(void *phy_id, const struct st33zp24_phy_ops *ops,
 		tpm_gen_interrupt(chip);
 	}
 
-	tpm_get_timeouts(chip);
-	tpm_do_selftest(chip);
-
 	return tpm_chip_register(chip);
 _tpm_clean_answer:
 	dev_info(&chip->dev, "TPM initialization fail\n");
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index f62c8518cd68..fd83f1ade5b9 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -315,6 +315,21 @@ int tpm_chip_register(struct tpm_chip *chip)
 {
 	int rc;
 
+	if (chip->ops->flags & TPM_OPS_PROBE_TPM2) {
+		rc = tpm2_probe(chip);
+		if (rc)
+			return rc;
+	}
+
+	if (chip->ops->flags & TPM_OPS_AUTO_STARTUP) {
+		if (chip->flags & TPM_CHIP_FLAG_TPM2)
+			rc = tpm2_auto_startup(chip);
+		else
+			rc = tpm1_auto_startup(chip);
+		if (rc)
+			return rc;
+	}
+
 	rc = tpm1_chip_register(chip);
 	if (rc)
 		return rc;
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 7cba092e3069..059292ba9322 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -844,6 +844,33 @@ int tpm_do_selftest(struct tpm_chip *chip)
 }
 EXPORT_SYMBOL_GPL(tpm_do_selftest);
 
+/**
+ * tpm1_auto_startup - Perform the standard automatic TPM initialization
+ *                     sequence
+ * @chip: TPM chip to use
+ *
+ * Returns 0 on success, < 0 in case of fatal error.
+ */
+int tpm1_auto_startup(struct tpm_chip *chip)
+{
+	int rc;
+
+	rc = tpm_get_timeouts(chip);
+	if (rc)
+		goto out;
+	rc = tpm_do_selftest(chip);
+	if (rc) {
+		dev_err(&chip->dev, "TPM self test failed\n");
+		goto out;
+	}
+
+	return rc;
+out:
+	if (rc > 0)
+		rc = -ENODEV;
+	return rc;
+}
+
 int tpm_send(u32 chip_num, void *cmd, size_t buflen)
 {
 	struct tpm_chip *chip;
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 8bc6fb85fb38..d3d3dd2edbe0 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -478,6 +478,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len,
 			 const char *desc);
 extern int tpm_get_timeouts(struct tpm_chip *);
 extern void tpm_gen_interrupt(struct tpm_chip *);
+int tpm1_auto_startup(struct tpm_chip *chip);
 extern int tpm_do_selftest(struct tpm_chip *);
 extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
 extern int tpm_pm_suspend(struct device *);
@@ -521,6 +522,7 @@ int tpm2_unseal_trusted(struct tpm_chip *chip,
 ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
 			u32 *value, const char *desc);
 
+int tpm2_auto_startup(struct tpm_chip *chip);
 extern int tpm2_startup(struct tpm_chip *chip, u16 startup_type);
 extern void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
 extern unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32);
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 9ce80313dae2..b9e782f21001 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -943,3 +943,43 @@ int tpm2_probe(struct tpm_chip *chip)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(tpm2_probe);
+
+/**
+ * tpm2_auto_startup - Perform the standard automatic TPM initialization
+ *                     sequence
+ * @chip: TPM chip to use
+ *
+ * Returns 0 on success, < 0 in case of fatal error.
+ */
+int tpm2_auto_startup(struct tpm_chip *chip)
+{
+	int rc;
+
+	rc = tpm_get_timeouts(chip);
+	if (rc)
+		goto out;
+
+	rc = tpm2_do_selftest(chip);
+	if (rc != TPM2_RC_INITIALIZE) {
+		dev_err(&chip->dev, "TPM self test failed\n");
+		goto out;
+	}
+
+	if (rc == TPM2_RC_INITIALIZE) {
+		rc = tpm2_startup(&chip->dev, TPM2_SU_CLEAR);
+		if (rc)
+			goto out;
+
+		rc = tpm2_do_selftest(chip);
+		if (rc) {
+			dev_err(&chip->dev, "TPM self test failed\n");
+			goto out;
+		}
+	}
+
+	return rc;
+out:
+	if (rc > 0)
+		rc = -ENODEV;
+	return rc;
+}
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index 20155d55a62b..bba9209718a2 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -182,6 +182,7 @@ static bool crb_req_canceled(struct tpm_chip *chip, u8 status)
 }
 
 static const struct tpm_class_ops tpm_crb = {
+	.flags = TPM_OPS_AUTO_STARTUP,
 	.status = crb_status,
 	.recv = crb_recv,
 	.send = crb_send,
@@ -194,7 +195,6 @@ static const struct tpm_class_ops tpm_crb = {
 static int crb_init(struct acpi_device *device, struct crb_priv *priv)
 {
 	struct tpm_chip *chip;
-	int rc;
 
 	chip = tpmm_chip_alloc(&device->dev, &tpm_crb);
 	if (IS_ERR(chip))
@@ -204,14 +204,6 @@ static int crb_init(struct acpi_device *device, struct crb_priv *priv)
 	chip->acpi_dev_handle = device->handle;
 	chip->flags = TPM_CHIP_FLAG_TPM2;
 
-	rc = tpm_get_timeouts(chip);
-	if (rc)
-		return rc;
-
-	rc = tpm2_do_selftest(chip);
-	if (rc)
-		return rc;
-
 	return tpm_chip_register(chip);
 }
 
diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c
index c37aa7259f76..95ce2e9ccdc6 100644
--- a/drivers/char/tpm/tpm_i2c_atmel.c
+++ b/drivers/char/tpm/tpm_i2c_atmel.c
@@ -141,6 +141,7 @@ static bool i2c_atmel_req_canceled(struct tpm_chip *chip, u8 status)
 }
 
 static const struct tpm_class_ops i2c_atmel = {
+	.flags = TPM_OPS_AUTO_STARTUP,
 	.status = i2c_atmel_read_status,
 	.recv = i2c_atmel_recv,
 	.send = i2c_atmel_send,
@@ -179,11 +180,6 @@ static int i2c_atmel_probe(struct i2c_client *client,
 	/* There is no known way to probe for this device, and all version
 	 * information seems to be read via TPM commands. Thus we rely on the
 	 * TPM startup process in the common code to detect the device. */
-	if (tpm_get_timeouts(chip))
-		return -ENODEV;
-
-	if (tpm_do_selftest(chip))
-		return -ENODEV;
 
 	return tpm_chip_register(chip);
 }
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index a426b6f67d2e..62ee44e57ddc 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -567,6 +567,7 @@ static bool tpm_tis_i2c_req_canceled(struct tpm_chip *chip, u8 status)
 }
 
 static const struct tpm_class_ops tpm_tis_i2c = {
+	.flags = TPM_OPS_AUTO_STARTUP,
 	.status = tpm_tis_i2c_status,
 	.recv = tpm_tis_i2c_recv,
 	.send = tpm_tis_i2c_send,
@@ -619,9 +620,6 @@ static int tpm_tis_i2c_init(struct device *dev)
 
 	tpm_dev.chip = chip;
 
-	tpm_get_timeouts(chip);
-	tpm_do_selftest(chip);
-
 	return tpm_chip_register(chip);
 out_release:
 	release_locality(chip, tpm_dev.locality, 1);
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index 4e32094b761d..e8ff3623e465 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -461,6 +461,7 @@ static bool i2c_nuvoton_req_canceled(struct tpm_chip *chip, u8 status)
 }
 
 static const struct tpm_class_ops tpm_i2c = {
+	.flags = TPM_OPS_AUTO_STARTUP,
 	.status = i2c_nuvoton_read_status,
 	.recv = i2c_nuvoton_recv,
 	.send = i2c_nuvoton_send,
@@ -609,12 +610,6 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
 		}
 	}
 
-	if (tpm_get_timeouts(chip))
-		return -ENODEV;
-
-	if (tpm_do_selftest(chip))
-		return -ENODEV;
-
 	return tpm_chip_register(chip);
 }
 
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 1e45e733df1a..11649824a1a2 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -551,6 +551,7 @@ static bool tpm_tis_req_canceled(struct tpm_chip *chip, u8 status)
 }
 
 static const struct tpm_class_ops tpm_tis = {
+	.flags = TPM_OPS_AUTO_STARTUP,
 	.status = tpm_tis_status,
 	.recv = tpm_tis_recv,
 	.send = tpm_tis_send,
@@ -812,29 +813,6 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
 			tpm_tis_probe_irq(chip, intmask);
 	}
 
-	if (chip->flags & TPM_CHIP_FLAG_TPM2) {
-		rc = tpm2_do_selftest(chip);
-		if (rc == TPM2_RC_INITIALIZE) {
-			dev_warn(dev, "Firmware has not started TPM\n");
-			rc  = tpm2_startup(chip, TPM2_SU_CLEAR);
-			if (!rc)
-				rc = tpm2_do_selftest(chip);
-		}
-
-		if (rc) {
-			dev_err(dev, "TPM self test failed\n");
-			if (rc > 0)
-				rc = -ENODEV;
-			goto out_err;
-		}
-	} else {
-		if (tpm_do_selftest(chip)) {
-			dev_err(dev, "TPM self test failed\n");
-			rc = -ENODEV;
-			goto out_err;
-		}
-	}
-
 	return tpm_chip_register(chip);
 out_err:
 	tpm_tis_remove(chip);
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index 706e63eea080..011547097f5b 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -33,7 +33,13 @@ struct tpm_chip;
 struct trusted_key_payload;
 struct trusted_key_options;
 
+enum TPM_OPS_FLAGS {
+	TPM_OPS_PROBE_TPM2 = BIT(0),
+	TPM_OPS_AUTO_STARTUP = BIT(1),
+};
+
 struct tpm_class_ops {
+	unsigned int flags;
 	const u8 req_complete_mask;
 	const u8 req_complete_val;
 	bool (*req_canceled)(struct tpm_chip *chip, u8 status);
-- 
2.1.4


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