diff mbox series

[RFC,05/32] char: impi, tpm: depend on HAS_IOPORT

Message ID 20211227164317.4146918-6-schnelle@linux.ibm.com (mailing list archive)
State Not Applicable
Delegated to: Bjorn Helgaas
Headers show
Series Kconfig: Introduce HAS_IOPORT and LEGACY_PCI options | expand

Commit Message

Niklas Schnelle Dec. 27, 2021, 4:42 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: 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

Geert Uytterhoeven Dec. 28, 2021, 10:17 a.m. UTC | #1 
Hi Niklas,

Thanks for your patch!

On Mon, Dec 27, 2021 at 5:51 PM Niklas Schnelle <schnelle@linux.ibm.com> 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: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
> ---
>  drivers/char/Kconfig             |  3 ++-

Your oneline-summary doesn't cover this file.

>  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(-)
>
> diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
> index 740811893c57..3d046e364e53 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

Why? drivers/char/lp.c doesn't use I/O accessors, and should work with
all parport drivers.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
Niklas Schnelle Dec. 28, 2021, 12:13 p.m. UTC | #2 
On Tue, 2021-12-28 at 11:17 +0100, Geert Uytterhoeven wrote:
> Hi Niklas,
> 
> Thanks for your patch!
> 
> On Mon, Dec 27, 2021 at 5:51 PM Niklas Schnelle <schnelle@linux.ibm.com> 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: Arnd Bergmann <arnd@kernel.org>
> > Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
> > ---
> >  drivers/char/Kconfig             |  3 ++-
> 
> Your oneline-summary doesn't cover this file.

Thanks, I guess then I should go with "char: depend on HAS_IOPORT"

> 
> >  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(-)
> > 
> > diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
> > index 740811893c57..3d046e364e53 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
> 
> Why? drivers/char/lp.c doesn't use I/O accessors, and should work with
> all parport drivers.

You're right that should work.

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
diff mbox series

Patch

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 740811893c57..3d046e364e53 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 b2659a4c4016..eb298e82861e 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 = {