Re: [dpdk-dev] [PATCH v3] ethdev: fix representor port ID search by name

[Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>]

On 8/20/21 3:18 PM, Andrew Rybchenko wrote:
> From: Viacheslav Galaktionov <viacheslav.galaktionov@oktetlabs.ru>
> 
> Getting a list of representors from a representor does not make sense.
> Instead, a parent device should be used.
> 
> To this end, extend the rte_eth_dev_data structure to include the port ID
> of the parent device for representors.
> 
> Signed-off-by: Viacheslav Galaktionov <viacheslav.galaktionov@oktetlabs.ru>
> Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
> ---
> The new field is added into the hole in rte_eth_dev_data structure.
> The patch does not change ABI, but extra care is required since ABI
> check is disabled for the structure because of the libabigail bug [1].
> 
> Potentially it is bad for out-of-tree drivers which implement
> representors but do not fill in a new parert_port_id field in
> rte_eth_dev_data structure. Do we care?
> 
> May be the patch should add lines to release notes, but I'd like
> to get initial feedback first.
> 
> mlx5 changes should be reviwed by maintainers very carefully, since
> we are not sure if we patch it correctly.
> 
> [1] https://sourceware.org/bugzilla/show_bug.cgi?id=28060
> 
> v3:
>     - fix mlx5 build breakage
> 
> v2:
>     - fix mlx5 review notes
>     - try device port ID first before parent in order to address
>       backward compatibility issue
> 
>  drivers/net/bnxt/bnxt_reps.c             |  1 +
>  drivers/net/enic/enic_vf_representor.c   |  1 +
>  drivers/net/i40e/i40e_vf_representor.c   |  1 +
>  drivers/net/ice/ice_dcf_vf_representor.c |  1 +
>  drivers/net/ixgbe/ixgbe_vf_representor.c |  1 +
>  drivers/net/mlx5/linux/mlx5_os.c         | 17 +++++++++++++++++
>  drivers/net/mlx5/windows/mlx5_os.c       | 17 +++++++++++++++++
>  lib/ethdev/ethdev_driver.h               |  6 +++---
>  lib/ethdev/rte_class_eth.c               | 22 ++++++++++++++++++++--
>  lib/ethdev/rte_ethdev.c                  |  8 ++++----
>  lib/ethdev/rte_ethdev_core.h             |  4 ++++
>  11 files changed, 70 insertions(+), 9 deletions(-)

There is later follow up in v2 review notes which should be
addressed. I'll send v4 tomorrow.