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SubjectRe: [PATCH v4 4/7] can: Kconfig: add CONFIG_CAN_RX_OFFLOAD
On Sat. 4 June 2022 at 20:22, Marc Kleine-Budde <mkl@pengutronix.de> wrote:
> On 03.06.2022 19:28:45, Vincent Mailhol wrote:
> > Only a few drivers rely on the CAN rx offload framework (as of the
> > writing of this patch, only three: flexcan, ti_hecc and
> > mcp251xfd). Give the option to the user to deselect this features
> > during compilation.
> >
> > The drivers relying on CAN rx offload are in different sub
> > folders. All of these drivers get tagged with "select CAN_RX_OFFLOAD"
> > so that the option is automatically enabled whenever one of those
> > driver is chosen.
> >
> > Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
> > ---
> > drivers/net/can/Kconfig | 16 ++++++++++++++++
> > drivers/net/can/dev/Makefile | 2 ++
> > drivers/net/can/spi/mcp251xfd/Kconfig | 1 +
> > 3 files changed, 19 insertions(+)
> >
> > diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
> > index 8f3b97aea638..1f1d81da1c8c 100644
> > --- a/drivers/net/can/Kconfig
> > +++ b/drivers/net/can/Kconfig
> > @@ -102,6 +102,20 @@ config CAN_CALC_BITTIMING
> >
> > If unsure, say Y.
> >
> > +config CAN_RX_OFFLOAD
> > + bool "CAN RX offload"
> > + default y
> > + help
> > + Framework to offload the controller's RX FIFO during one
> > + interrupt. The CAN frames of the FIFO are read and put into a skb
> > + queue during that interrupt and transmitted afterwards in a NAPI
> > + context.
> > +
> > + The additional features selected by this option will be added to the
> > + can-dev module.
> > +
> > + If unsure, say Y.
> > +
> > config CAN_AT91
> > tristate "Atmel AT91 onchip CAN controller"
> > depends on (ARCH_AT91 || COMPILE_TEST) && HAS_IOMEM
> > @@ -113,6 +127,7 @@ config CAN_FLEXCAN
> > tristate "Support for Freescale FLEXCAN based chips"
> > depends on OF || COLDFIRE || COMPILE_TEST
> > depends on HAS_IOMEM
> > + select CAN_RX_OFFLOAD
> > help
> > Say Y here if you want to support for Freescale FlexCAN.
> >
> > @@ -162,6 +177,7 @@ config CAN_SUN4I
> > config CAN_TI_HECC
> > depends on ARM
> > tristate "TI High End CAN Controller"
> > + select CAN_RX_OFFLOAD
> > help
> > Driver for TI HECC (High End CAN Controller) module found on many
> > TI devices. The device specifications are available from www.ti.com
> > diff --git a/drivers/net/can/dev/Makefile b/drivers/net/can/dev/Makefile
> > index b8a55b1d90cd..5081d8a3be57 100644
> > --- a/drivers/net/can/dev/Makefile
> > +++ b/drivers/net/can/dev/Makefile
> > @@ -11,3 +11,5 @@ can-dev-$(CONFIG_CAN_NETLINK) += netlink.o
> > can-dev-$(CONFIG_CAN_NETLINK) += rx-offload.o
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> Do you want to remove this?

Absolutely. As you probably guessed, this is just a leftover.

> >
> > can-dev-$(CONFIG_CAN_CALC_BITTIMING) += calc_bittiming.o
> > +
> > +can-dev-$(CONFIG_CAN_RX_OFFLOAD) += rx-offload.o
> > diff --git a/drivers/net/can/spi/mcp251xfd/Kconfig b/drivers/net/can/spi/mcp251xfd/Kconfig
> > index dd0fc0a54be1..877e4356010d 100644
> > --- a/drivers/net/can/spi/mcp251xfd/Kconfig
> > +++ b/drivers/net/can/spi/mcp251xfd/Kconfig
> > @@ -2,6 +2,7 @@
> >
> > config CAN_MCP251XFD
> > tristate "Microchip MCP251xFD SPI CAN controllers"
> > + select CAN_RX_OFFLOAD
> > select REGMAP
> > select WANT_DEV_COREDUMP
> > help
>
> I remember I've given you a list of drivers needing RX offload, I
> probably missed the m_can driver. Feel free to squash this patch:

Added it to v5.

This went through the cracks when testing. Thanks for catching this!

> --- a/drivers/net/can/dev/Makefile
> +++ b/drivers/net/can/dev/Makefile
> @@ -8,7 +8,6 @@ can-dev-$(CONFIG_CAN_NETLINK) += bittiming.o
> can-dev-$(CONFIG_CAN_NETLINK) += dev.o
> can-dev-$(CONFIG_CAN_NETLINK) += length.o
> can-dev-$(CONFIG_CAN_NETLINK) += netlink.o
> -can-dev-$(CONFIG_CAN_NETLINK) += rx-offload.o
>
> can-dev-$(CONFIG_CAN_CALC_BITTIMING) += calc_bittiming.o
>
> diff --git a/drivers/net/can/m_can/Kconfig b/drivers/net/can/m_can/Kconfig
> index 45ad1b3f0cd0..fc2afab36279 100644
> --- a/drivers/net/can/m_can/Kconfig
> +++ b/drivers/net/can/m_can/Kconfig
> @@ -1,6 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0-only
> menuconfig CAN_M_CAN
> tristate "Bosch M_CAN support"
> + select CAN_RX_OFFLOAD
> help
> Say Y here if you want support for Bosch M_CAN controller framework.
> This is common support for devices that embed the Bosch M_CAN IP.
>
> Marc
>
> --
> Pengutronix e.K. | Marc Kleine-Budde |
> Embedded Linux | https://www.pengutronix.de |
> Vertretung West/Dortmund | Phone: +49-231-2826-924 |
> Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

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