From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: 0001-added-tpm-2.0-support-to-nuvoton-i2c-driver.patch Date: Tue, 19 Apr 2016 15:09:50 -0600 Message-ID: <20160419210950.GA28137@obsidianresearch.com> References: <20160419050442.7048840F8@taln70.nuvoton.co.il> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20160419050442.7048840F8-1UdtCKOZWuXOzY7siszIiwMMGMOHi2eC@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tpmdd-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: "Andrew Zamansky (NTIL)" Cc: shmulik.hager-KrzQf0k3Iz9BDgjK7y7TUQ@public.gmane.org, tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, gcwilson-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org, dan.morav-KrzQf0k3Iz9BDgjK7y7TUQ@public.gmane.org, --@taln70.nuvoton.co.il List-Id: tpmdd-devel@lists.sourceforge.net 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 > 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 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 --- 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 ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. 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