[dpdk-dev] [PATCH v6 2/2] bus/auxiliary: introduce auxiliary bus

[Kinsella, Ray]

On 25/06/2021 12:47, Xueming Li wrote:
> Auxiliary bus [1] provides a way to split function into child-devices
> representing sub-domains of functionality. Each auxiliary device
> represents a part of its parent functionality.
> 
> Auxiliary device is identified by unique device name, sysfs path:
>   /sys/bus/auxiliary/devices/<name>
> 
> Devargs legacy syntax ofauxiliary device:
>   -a auxiliary:<name>[,args...]
> Devargs generic syntax of auxiliary device:
>   -a bus=auxiliary,name=<name>,,/class=<classs>,,/driver=<driver>,,
> 
> [1] kernel auxiliary bus document:
> https://www.kernel.org/doc/html/latest/driver-api/auxiliary_bus.html
> 
> Signed-off-by: Xueming Li <xuemingl at nvidia.com>
> Cc: Wang Haiyue <haiyue.wang at intel.com>
> Cc: Thomas Monjalon <thomas at monjalon.net>
> Cc: Kinsella Ray <mdr at ashroe.eu>
> ---
>  MAINTAINERS                               |   5 +
>  doc/guides/rel_notes/release_21_08.rst    |   6 +
>  drivers/bus/auxiliary/auxiliary_common.c  | 411 ++++++++++++++++++++++
>  drivers/bus/auxiliary/auxiliary_params.c  |  59 ++++
>  drivers/bus/auxiliary/linux/auxiliary.c   | 141 ++++++++
>  drivers/bus/auxiliary/meson.build         |  16 +
>  drivers/bus/auxiliary/private.h           |  74 ++++
>  drivers/bus/auxiliary/rte_bus_auxiliary.h | 201 +++++++++++
>  drivers/bus/auxiliary/version.map         |   7 +
>  drivers/bus/meson.build                   |   1 +
>  10 files changed, 921 insertions(+)
>  create mode 100644 drivers/bus/auxiliary/auxiliary_common.c
>  create mode 100644 drivers/bus/auxiliary/auxiliary_params.c
>  create mode 100644 drivers/bus/auxiliary/linux/auxiliary.c
>  create mode 100644 drivers/bus/auxiliary/meson.build
>  create mode 100644 drivers/bus/auxiliary/private.h
>  create mode 100644 drivers/bus/auxiliary/rte_bus_auxiliary.h
>  create mode 100644 drivers/bus/auxiliary/version.map
> 

[SNIP]

> diff --git a/drivers/bus/auxiliary/version.map b/drivers/bus/auxiliary/version.map
> new file mode 100644
> index 0000000000..a52260657c
> --- /dev/null
> +++ b/drivers/bus/auxiliary/version.map
> @@ -0,0 +1,7 @@
> +EXPERIMENTAL {
> +	global:
> +
> +	# added in 21.08
> +	rte_auxiliary_register;
> +	rte_auxiliary_unregister;
> +};

Aren't these really internal?

> diff --git a/drivers/bus/meson.build b/drivers/bus/meson.build
> index 410058de3a..45eab5233d 100644
> --- a/drivers/bus/meson.build
> +++ b/drivers/bus/meson.build
> @@ -2,6 +2,7 @@
>  # Copyright(c) 2017 Intel Corporation
>  
>  drivers = [
> +        'auxiliary',
>          'dpaa',
>          'fslmc',
>          'ifpga',
>