| Message ID | 20250212220548.400447-3-stuart.yoder@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Add support for the TPM FF-A start method | expand |
On Wed, Feb 12, 2025 at 04:05:45PM -0600, Stuart Yoder wrote: > Refactor the two checks for whether the TPM supports idle into a single > inline function. > > Signed-off-by: Stuart Yoder <stuart.yoder@arm.com> > --- > drivers/char/tpm/tpm_crb.c | 18 ++++++++++++------ > 1 file changed, 12 insertions(+), 6 deletions(-) > > diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c > index ea085b14ab7c..87d69e990249 100644 > --- a/drivers/char/tpm/tpm_crb.c > +++ b/drivers/char/tpm/tpm_crb.c > @@ -115,6 +115,16 @@ struct tpm2_crb_pluton { > u64 reply_addr; > }; > > +static inline bool does_tpm_support_idle(u32 start_method) > +{ > + if ((start_method == ACPI_TPM2_START_METHOD) || > + (start_method == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) || > + (start_method == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC)) > + return false; > + else > + return true; > +} > + I think we could also prefix tpm_crb stuff with tpm_crb_* for the sake of easier grepping etc. So I'd propose this to be called as: tpm_crb_has_idle() > static bool crb_wait_for_reg_32(u32 __iomem *reg, u32 mask, u32 value, > unsigned long timeout) > { > @@ -173,9 +183,7 @@ static int __crb_go_idle(struct device *dev, struct crb_priv *priv) > { > int rc; > > - if ((priv->sm == ACPI_TPM2_START_METHOD) || > - (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) || > - (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC)) > + if (!does_tpm_support_idle(priv->sm)) > return 0; > > iowrite32(CRB_CTRL_REQ_GO_IDLE, &priv->regs_t->ctrl_req); > @@ -222,9 +230,7 @@ static int __crb_cmd_ready(struct device *dev, struct crb_priv *priv) > { > int rc; > > - if ((priv->sm == ACPI_TPM2_START_METHOD) || > - (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) || > - (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC)) > + if (!does_tpm_support_idle(priv->sm)) > return 0; > > iowrite32(CRB_CTRL_REQ_CMD_READY, &priv->regs_t->ctrl_req); > -- > 2.34.1 > BR, Jarkko
On 2/13/25 4:13 PM, Jarkko Sakkinen wrote: > On Wed, Feb 12, 2025 at 04:05:45PM -0600, Stuart Yoder wrote: >> Refactor the two checks for whether the TPM supports idle into a single >> inline function. >> >> Signed-off-by: Stuart Yoder <stuart.yoder@arm.com> >> --- >> drivers/char/tpm/tpm_crb.c | 18 ++++++++++++------ >> 1 file changed, 12 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c >> index ea085b14ab7c..87d69e990249 100644 >> --- a/drivers/char/tpm/tpm_crb.c >> +++ b/drivers/char/tpm/tpm_crb.c >> @@ -115,6 +115,16 @@ struct tpm2_crb_pluton { >> u64 reply_addr; >> }; >> >> +static inline bool does_tpm_support_idle(u32 start_method) >> +{ >> + if ((start_method == ACPI_TPM2_START_METHOD) || >> + (start_method == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) || >> + (start_method == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC)) >> + return false; >> + else >> + return true; >> +} >> + > > I think we could also prefix tpm_crb stuff with tpm_crb_* for the sake > of easier grepping etc. > > So I'd propose this to be called as: tpm_crb_has_idle() Ack. Stuart
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c index ea085b14ab7c..87d69e990249 100644 --- a/drivers/char/tpm/tpm_crb.c +++ b/drivers/char/tpm/tpm_crb.c @@ -115,6 +115,16 @@ struct tpm2_crb_pluton { u64 reply_addr; }; +static inline bool does_tpm_support_idle(u32 start_method) +{ + if ((start_method == ACPI_TPM2_START_METHOD) || + (start_method == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) || + (start_method == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC)) + return false; + else + return true; +} + static bool crb_wait_for_reg_32(u32 __iomem *reg, u32 mask, u32 value, unsigned long timeout) { @@ -173,9 +183,7 @@ static int __crb_go_idle(struct device *dev, struct crb_priv *priv) { int rc; - if ((priv->sm == ACPI_TPM2_START_METHOD) || - (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) || - (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC)) + if (!does_tpm_support_idle(priv->sm)) return 0; iowrite32(CRB_CTRL_REQ_GO_IDLE, &priv->regs_t->ctrl_req); @@ -222,9 +230,7 @@ static int __crb_cmd_ready(struct device *dev, struct crb_priv *priv) { int rc; - if ((priv->sm == ACPI_TPM2_START_METHOD) || - (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) || - (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC)) + if (!does_tpm_support_idle(priv->sm)) return 0; iowrite32(CRB_CTRL_REQ_CMD_READY, &priv->regs_t->ctrl_req);
Refactor the two checks for whether the TPM supports idle into a single inline function. Signed-off-by: Stuart Yoder <stuart.yoder@arm.com> --- drivers/char/tpm/tpm_crb.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-)