Re: [PATCH 2/2] devargs: announce ABI change for device parameters

[Thomas Monjalon <thomas@monjalon.net>]

10/05/2017 14:52, Gaetan Rivet:
> The PCI and virtual bus are planned to be moved to the generic
> drivers/bus directory in v17.08. For this change to be possible, the EAL
> must be made completely independent.
> 
> The rte_devargs structure currently holds device representation internal
> to those two busses. It must be made generic before this work can be
> completed.
> 
> Instead of using either a driver name for a vdev or a PCI address for a
> PCI device, a devargs structure will have to be able to describe any
> possible device on all busses, without introducing dependencies on
> any bus-specific device representation. This will break the ABI for this
> structure.
> 
> Additionally, an evolution will occur regarding the device parsing
> from the command-line. A user must be able to set which bus will handle
> which device, and this setting is integral to the definition of a
> device.

This syntax evolution is not announced below.

> The format has not yet been formally defined, but a proposition will
> follow soon for a new command line parameter format for all devices.
> 
> Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
> ---
>  doc/guides/rel_notes/deprecation.rst | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
> index c2f58eb..e91fc99 100644
> --- a/doc/guides/rel_notes/deprecation.rst
> +++ b/doc/guides/rel_notes/deprecation.rst
> @@ -87,3 +87,7 @@ Deprecation Notices
>  
>    - ``rte_eal_pci_detach``, replaced by using the corresponding bus generic
>      method ``detach``.
> +
> +* devargs: An ABI change is planned for 17.08 for the structure ``rte_devargs``.
> +  The current version is dependent on bus-specific device identifier, which will
> +  be made generic and abstracted, in order to make the EAL bus-agnostic.
>