Re: [PATCH v3 03/38] char: impi, tpm: depend on HAS_IOPORT

Jarkko Sakkinen
2023-03-14T12:40:19Z

On Tue, Mar 14, 2023 at 01:11:41PM +0100, 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>
> ---
> 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/pcmcia/Kconfig | 8 ++++----
> drivers/char/tpm/Kconfig | 1 +
> drivers/char/tpm/tpm_infineon.c | 14 ++++++++++----
> drivers/char/tpm/tpm_tis_core.c | 19 ++++++++-----------
> 8 files changed, 34 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
> index 30fe9848dac1..c34679c6da70 100644
> --- a/drivers/char/Kconfig
> +++ b/drivers/char/Kconfig
> @@ -34,6 +34,7 @@ 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
> @@ -342,7 +343,7 @@ 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 cb6138b8ded9..e0944547c9d0 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 abddd7e43a9a..edbbdb804913 100644
> --- a/drivers/char/ipmi/ipmi_si_intf.c
> +++ b/drivers/char/ipmi/ipmi_si_intf.c
> @@ -1882,7 +1882,8 @@ 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/pcmcia/Kconfig b/drivers/char/pcmcia/Kconfig
> index f5d589b2be44..788422627b43 100644
> --- a/drivers/char/pcmcia/Kconfig
> +++ b/drivers/char/pcmcia/Kconfig
> @@ -8,7 +8,7 @@ menu "PCMCIA character devices"
>
> config SYNCLINK_CS
> tristate "SyncLink PC Card support"
> - depends on PCMCIA && TTY
> + depends on PCMCIA && TTY && HAS_IOPORT
> help
> Enable support for the SyncLink PC Card serial adapter, running
> asynchronous and HDLC communications up to 512Kbps. The port is
> @@ -21,7 +21,7 @@ config SYNCLINK_CS
>
> config CARDMAN_4000
> tristate "Omnikey Cardman 4000 support"
> - depends on PCMCIA
> + depends on PCMCIA && HAS_IOPORT
> select BITREVERSE
> help
> Enable support for the Omnikey Cardman 4000 PCMCIA Smartcard
> @@ -33,7 +33,7 @@ config CARDMAN_4000
>
> config CARDMAN_4040
> tristate "Omnikey CardMan 4040 support"
> - depends on PCMCIA
> + depends on PCMCIA && HAS_IOPORT
> help
> Enable support for the Omnikey CardMan 4040 PCMCIA Smartcard
> reader.
> @@ -57,7 +57,7 @@ config SCR24X
>
> config IPWIRELESS
> tristate "IPWireless 3G UMTS PCMCIA card support"
> - depends on PCMCIA && NETDEVICES && TTY
> + depends on PCMCIA && NETDEVICES && TTY && HAS_IOPORT
> select PPP
> help
> This is a driver for 3G UMTS PCMCIA card from IPWireless company. In
> diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
> index 927088b2c3d3..418c9ed59ffd 100644
> --- a/drivers/char/tpm/Kconfig
> +++ b/drivers/char/tpm/Kconfig
> @@ -149,6 +149,7 @@ 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 3f98e587b3e8..e43d2a1da3ea 100644
> --- a/drivers/char/tpm/tpm_tis_core.c
> +++ b/drivers/char/tpm/tpm_tis_core.c
> @@ -897,11 +897,6 @@ 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)
> @@ -912,13 +907,15 @@ 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 = {
> --
> 2.37.2
>

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

Who should pick this?

BR, Jarkko