Merge branch 'eth-fbnic-fix-and-improve-header-data-split-configuration'

Merge branch 'eth-fbnic-fix-and-improve-header-data-split-configuration'

Bobby Eshleman says:

====================
eth: fbnic: fix and improve header/data split configuration

This series fixes TCP HDS configuration in the fbnic driver and adds a
devmem selftest for the intended behavior.

The issues fixed include setting the correct CSR for EN_HDR_SPLIT,
adjusting the hds threshold clamp to avoid long headers overflowing into
the payload page, and configuring the device to use L4/L3/L2 header
boundaries when present by programming the DMA hint bit unconditionally
for all steering rule types.

Prior to these fixes, small payloads fail devmem.check_rx_hds().

Testing:

IFC0=enp1s0
IFC1=eth0

export REMOTE_TYPE=netns
export REMOTE_ARGS=ns-remote
export NETIF=$IFC0
export LOCAL_V4=192.0.3.1
export REMOTE_V4=192.0.3.2
sysctl -w net.ipv6.conf.$IFC0.keep_addr_on_down=1

./tools/testing/selftests/drivers/net/hw/devmem.py

TAP version 13
1..4
ok 1 devmem.check_rx
ok 2 devmem.check_tx
ok 3 devmem.check_tx_chunks
ok 4 devmem.check_rx_hds

To: Alexander Duyck <alexanderduyck@fb.com>
To: Jakub Kicinski <kuba@kernel.org>
To: kernel-team@meta.com
To: Andrew Lunn <andrew+netdev@lunn.ch>
To: David S. Miller <davem@davemloft.net>
To: Eric Dumazet <edumazet@google.com>
To: Paolo Abeni <pabeni@redhat.com>
To: Mohsin Bashir <mohsin.bashr@gmail.com>
To: Shuah Khan <shuah@kernel.org>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Bobby Eshleman <bobbyeshleman@meta.com>
====================

Link: https://patch.msgid.link/20260211-fbnic-tcp-hds-fixes-v1-0-55d050e6f606@meta.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>