[dpdk-dev] [PATCH] doc: plan splitting the ethdev ops struct

Jerin Jacob jerinjacobk at gmail.com
Tue Feb 18 06:07:23 CET 2020

On Mon, Feb 17, 2020 at 9:08 PM Ferruh Yigit <ferruh.yigit at intel.com> wrote:
> For the ABI compatibility it is better to hide internal data structures
> from the application as much as possible. But because of some inline
> functions 'struct eth_dev_ops' can't be hidden completely.
> Plan is to split the 'struct eth_dev_ops' into two as ones used by
> inline functions and ones not used, and hide the second part that not
> used by inline functions completely to the application.

It is a good improvement.  IMO, If anything used in fast-path it
should be in ``struct rte_eth_dev``
and rest can completely be moved to internal. In this case, if
not used on fastpath, Maybe we don't need to maintain the inline
status and move completely
to .c file.

Those may be specifics of the work. In general, this change looks good to me.

Acked-by: Jerin Jacob <jerinj at marvell.com>

> Signed-off-by: Ferruh Yigit <ferruh.yigit at intel.com>
> ---
> Cc: David Marchand <david.marchand at redhat.com>
> Cc: Thomas Monjalon <thomas at monjalon.net>
> Cc: Andrew Rybchenko <arybchenko at solarflare.com>
> ---
>  doc/guides/rel_notes/deprecation.rst | 6 ++++++
>  1 file changed, 6 insertions(+)
> diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
> index dfcca87ab..2aa431028 100644
> --- a/doc/guides/rel_notes/deprecation.rst
> +++ b/doc/guides/rel_notes/deprecation.rst
> @@ -72,6 +72,12 @@ Deprecation Notices
>    In 19.11 PMDs will still update the field even when the offload is not
>    enabled.
> +* ethdev: Split the ``struct eth_dev_ops`` struct to hide it as much as possible.
> +  Currently the ``struct eth_dev_ops`` struct is accessible by the application
> +  because some inline functions, like ``rte_eth_tx_descriptor_status()``,
> +  access the struct directly. The struct will be separate in two, the ops used
> +  by inline functions still will be accessible to user but rest will be hidden.
> +
>  * cryptodev: support for using IV with all sizes is added, J0 still can
>    be used but only when IV length in following structs ``rte_crypto_auth_xform``,
>    ``rte_crypto_aead_xform`` is set to zero. When IV length is greater or equal
> --
> 2.24.1

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