Re: [PATCH v2] net/ixgbe: add fdir_buffer_size devarg

[Bruce Richardson <bruce.richardson@intel.com>]

On Thu, Sep 10, 2026 at 11:58:12PM +0800, Zhang Tengfei wrote:
> After public fdir_conf was removed from rte_eth_conf, the private
> pballoc field stays at the 64K default. Add a probe-time devarg so
> applications can select 128K or 256K Flow Director table size.
> 
> Reject Flow Director with DCB in ixgbe_fdir_configure(), since FDIR
> steals Rx packet buffer space that DCB also uses.
> 
> Signed-off-by: Zhang Tengfei <zhtfdev@gmail.com>
> ---
> v2:
> * rename fdir_pballoc to fdir_buffer_size
> * reject Flow Director when DCB is enabled in ixgbe_fdir_configure()
> * document the DCB limitation as an RST note
> * keep the original indent of ixgbe_parse_devargs
> 
>  doc/guides/nics/ixgbe.rst              | 26 ++++++++++++
>  doc/guides/rel_notes/release_26_11.rst |  5 +++
>  drivers/net/intel/ixgbe/ixgbe_ethdev.c | 55 ++++++++++++++++++++++----
>  drivers/net/intel/ixgbe/ixgbe_ethdev.h |  2 +-
>  drivers/net/intel/ixgbe/ixgbe_fdir.c   | 13 +++++-
>  drivers/net/intel/ixgbe/ixgbe_flow.c   |  7 +++-
>  6 files changed, 98 insertions(+), 10 deletions(-)
> 
Acked-by: Bruce Richardson <bruce.richardson@intel.com>