diff mbox series

[05/37] char: impi, tpm: depend on HAS_IOPORT

Message ID 20220429135108.2781579-9-schnelle@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series None | expand

Commit Message

Niklas Schnelle April 29, 2022, 1:50 p.m. UTC 
In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. We thus need to add this dependency and ifdef
sections of code using inb()/outb() as alternative access methods.

Co-developed-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
---
 drivers/char/Kconfig             |  3 ++-
 drivers/char/ipmi/Makefile       | 11 ++++-------
 drivers/char/ipmi/ipmi_si_intf.c |  3 ++-
 drivers/char/ipmi/ipmi_si_pci.c  |  3 +++
 drivers/char/tpm/Kconfig         |  1 +
 drivers/char/tpm/tpm_infineon.c  | 14 ++++++++++----
 drivers/char/tpm/tpm_tis_core.c  | 19 ++++++++-----------
 7 files changed, 30 insertions(+), 24 deletions(-)

Comments

Ahmad Fatoum April 29, 2022, 2:02 p.m. UTC | #1 
Hello Niklas,

On 29.04.22 15:50, Niklas Schnelle wrote:
> In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
> not being declared. We thus need to add this dependency and ifdef
> sections of code using inb()/outb() as alternative access methods.
> 
> Co-developed-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>

[snip]

> diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
> index 9c924a1440a9..2d2ae37153ba 100644
> --- a/drivers/char/tpm/tpm_infineon.c
> +++ b/drivers/char/tpm/tpm_infineon.c
> @@ -51,34 +51,40 @@ static struct tpm_inf_dev tpm_dev;
>  
>  static inline void tpm_data_out(unsigned char data, unsigned char offset)
>  {
> +#ifdef CONFIG_HAS_IOPORT
>  	if (tpm_dev.iotype == TPM_INF_IO_PORT)
>  		outb(data, tpm_dev.data_regs + offset);
>  	else
> +#endif

This looks ugly. Can't you declare inb/outb anyway and skip the definition,
so you can use IS_ENABLED() here instead?

You can mark the declarations with __compiletime_error("some message"), so
if an IS_ENABLED() reference is not removed at compile time, you get some
readable error message instead of a link error.

Cheers,
Ahmad

>  		writeb(data, tpm_dev.mem_base + tpm_dev.data_regs + offset);
>  }
>  
>  static inline unsigned char tpm_data_in(unsigned char offset)
>  {
> +#ifdef CONFIG_HAS_IOPORT
>  	if (tpm_dev.iotype == TPM_INF_IO_PORT)
>  		return inb(tpm_dev.data_regs + offset);
> -	else
> -		return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
> +#endif
> +	return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
>  }
>  
>  static inline void tpm_config_out(unsigned char data, unsigned char offset)
>  {
> +#ifdef CONFIG_HAS_IOPORT
>  	if (tpm_dev.iotype == TPM_INF_IO_PORT)
>  		outb(data, tpm_dev.config_port + offset);
>  	else
> +#endif
>  		writeb(data, tpm_dev.mem_base + tpm_dev.index_off + offset);
>  }
>  
>  static inline unsigned char tpm_config_in(unsigned char offset)
>  {
> +#ifdef CONFIG_HAS_IOPORT
>  	if (tpm_dev.iotype == TPM_INF_IO_PORT)
>  		return inb(tpm_dev.config_port + offset);
> -	else
> -		return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
> +#endif
> +	return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
>  }
>  
>  /* TPM header definitions */
> diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
> index dc56b976d816..1efb58dc1b41 100644
> --- a/drivers/char/tpm/tpm_tis_core.c
> +++ b/drivers/char/tpm/tpm_tis_core.c
> @@ -879,11 +879,6 @@ static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
>  		clkrun_val &= ~LPC_CLKRUN_EN;
>  		iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);
>  
> -		/*
> -		 * Write any random value on port 0x80 which is on LPC, to make
> -		 * sure LPC clock is running before sending any TPM command.
> -		 */
> -		outb(0xCC, 0x80);
>  	} else {
>  		data->clkrun_enabled--;
>  		if (data->clkrun_enabled)
> @@ -894,13 +889,15 @@ static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
>  		/* Enable LPC CLKRUN# */
>  		clkrun_val |= LPC_CLKRUN_EN;
>  		iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);
> -
> -		/*
> -		 * Write any random value on port 0x80 which is on LPC, to make
> -		 * sure LPC clock is running before sending any TPM command.
> -		 */
> -		outb(0xCC, 0x80);
>  	}
> +
> +#ifdef CONFIG_HAS_IOPORT
> +	/*
> +	 * Write any random value on port 0x80 which is on LPC, to make
> +	 * sure LPC clock is running before sending any TPM command.
> +	 */
> +	outb(0xCC, 0x80);
> +#endif
>  }
>  
>  static const struct tpm_class_ops tpm_tis = {
diff mbox series

Patch

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 55f48375e3fe..463b82935e78 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -33,6 +33,7 @@  config TTY_PRINTK_LEVEL
 config PRINTER
 	tristate "Parallel printer support"
 	depends on PARPORT
+	depends on HAS_IOPORT
 	help
 	  If you intend to attach a printer to the parallel port of your Linux
 	  box (as opposed to using a serial printer; if the connector at the
@@ -346,7 +347,7 @@  config NVRAM
 
 config DEVPORT
 	bool "/dev/port character device"
-	depends on ISA || PCI
+	depends on HAS_IOPORT
 	default y
 	help
 	  Say Y here if you want to support the /dev/port device. The /dev/port
diff --git a/drivers/char/ipmi/Makefile b/drivers/char/ipmi/Makefile
index 7ce790efad92..439bed4feb3a 100644
--- a/drivers/char/ipmi/Makefile
+++ b/drivers/char/ipmi/Makefile
@@ -5,13 +5,10 @@ 
 
 ipmi_si-y := ipmi_si_intf.o ipmi_kcs_sm.o ipmi_smic_sm.o ipmi_bt_sm.o \
 	ipmi_si_hotmod.o ipmi_si_hardcode.o ipmi_si_platform.o \
-	ipmi_si_port_io.o ipmi_si_mem_io.o
-ifdef CONFIG_PCI
-ipmi_si-y += ipmi_si_pci.o
-endif
-ifdef CONFIG_PARISC
-ipmi_si-y += ipmi_si_parisc.o
-endif
+	ipmi_si_mem_io.o
+ipmi_si-$(CONFIG_HAS_IOPORT) += ipmi_si_port_io.o
+ipmi_si-$(CONFIG_PCI) += ipmi_si_pci.o
+ipmi_si-$(CONFIG_PARISC) += ipmi_si_parisc.o
 
 obj-$(CONFIG_IPMI_HANDLER) += ipmi_msghandler.o
 obj-$(CONFIG_IPMI_DEVICE_INTERFACE) += ipmi_devintf.o
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 64dedb3ef8ec..e8094b4007de 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1881,7 +1881,8 @@  int ipmi_si_add_smi(struct si_sm_io *io)
 	}
 
 	if (!io->io_setup) {
-		if (io->addr_space == IPMI_IO_ADDR_SPACE) {
+		if (IS_ENABLED(CONFIG_HAS_IOPORT) &&
+		    io->addr_space == IPMI_IO_ADDR_SPACE) {
 			io->io_setup = ipmi_si_port_setup;
 		} else if (io->addr_space == IPMI_MEM_ADDR_SPACE) {
 			io->io_setup = ipmi_si_mem_setup;
diff --git a/drivers/char/ipmi/ipmi_si_pci.c b/drivers/char/ipmi/ipmi_si_pci.c
index 74fa2055868b..b83d55685b22 100644
--- a/drivers/char/ipmi/ipmi_si_pci.c
+++ b/drivers/char/ipmi/ipmi_si_pci.c
@@ -97,6 +97,9 @@  static int ipmi_pci_probe(struct pci_dev *pdev,
 	}
 
 	if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
+		if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+			return -ENXIO;
+
 		io.addr_space = IPMI_IO_ADDR_SPACE;
 		io.io_setup = ipmi_si_port_setup;
 	} else {
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 4a5516406c22..4bc52ed08015 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -137,6 +137,7 @@  config TCG_NSC
 config TCG_ATMEL
 	tristate "Atmel TPM Interface"
 	depends on PPC64 || HAS_IOPORT_MAP
+	depends on HAS_IOPORT
 	help
 	  If you have a TPM security chip from Atmel say Yes and it 
 	  will be accessible from within Linux.  To compile this driver 
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index 9c924a1440a9..2d2ae37153ba 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -51,34 +51,40 @@  static struct tpm_inf_dev tpm_dev;
 
 static inline void tpm_data_out(unsigned char data, unsigned char offset)
 {
+#ifdef CONFIG_HAS_IOPORT
 	if (tpm_dev.iotype == TPM_INF_IO_PORT)
 		outb(data, tpm_dev.data_regs + offset);
 	else
+#endif
 		writeb(data, tpm_dev.mem_base + tpm_dev.data_regs + offset);
 }
 
 static inline unsigned char tpm_data_in(unsigned char offset)
 {
+#ifdef CONFIG_HAS_IOPORT
 	if (tpm_dev.iotype == TPM_INF_IO_PORT)
 		return inb(tpm_dev.data_regs + offset);
-	else
-		return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
+#endif
+	return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
 }
 
 static inline void tpm_config_out(unsigned char data, unsigned char offset)
 {
+#ifdef CONFIG_HAS_IOPORT
 	if (tpm_dev.iotype == TPM_INF_IO_PORT)
 		outb(data, tpm_dev.config_port + offset);
 	else
+#endif
 		writeb(data, tpm_dev.mem_base + tpm_dev.index_off + offset);
 }
 
 static inline unsigned char tpm_config_in(unsigned char offset)
 {
+#ifdef CONFIG_HAS_IOPORT
 	if (tpm_dev.iotype == TPM_INF_IO_PORT)
 		return inb(tpm_dev.config_port + offset);
-	else
-		return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
+#endif
+	return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
 }
 
 /* TPM header definitions */
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index dc56b976d816..1efb58dc1b41 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -879,11 +879,6 @@  static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
 		clkrun_val &= ~LPC_CLKRUN_EN;
 		iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);
 
-		/*
-		 * Write any random value on port 0x80 which is on LPC, to make
-		 * sure LPC clock is running before sending any TPM command.
-		 */
-		outb(0xCC, 0x80);
 	} else {
 		data->clkrun_enabled--;
 		if (data->clkrun_enabled)
@@ -894,13 +889,15 @@  static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
 		/* Enable LPC CLKRUN# */
 		clkrun_val |= LPC_CLKRUN_EN;
 		iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);
-
-		/*
-		 * Write any random value on port 0x80 which is on LPC, to make
-		 * sure LPC clock is running before sending any TPM command.
-		 */
-		outb(0xCC, 0x80);
 	}
+
+#ifdef CONFIG_HAS_IOPORT
+	/*
+	 * Write any random value on port 0x80 which is on LPC, to make
+	 * sure LPC clock is running before sending any TPM command.
+	 */
+	outb(0xCC, 0x80);
+#endif
 }
 
 static const struct tpm_class_ops tpm_tis = {