linux-kernel - [RFC net-next v4 0/3] Add RSS and LRO support

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Message-ID: <20251217102648.47093-1-linux@fw-web.de>
Date: Wed, 17 Dec 2025 11:26:41 +0100
From: Frank Wunderlich <linux@...web.de>
To: Felix Fietkau <nbd@....name>,
	Sean Wang <sean.wang@...iatek.com>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Russell King <linux@...linux.org.uk>
Cc: Frank Wunderlich <frank-w@...lic-files.de>,
	Daniel Golle <daniel@...rotopia.org>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: [RFC net-next v4 0/3] Add RSS and LRO support

From: Frank Wunderlich <frank-w@...lic-files.de>

This series add RSS and LRO hardware acceleration for terminating
traffic on MT798x.

It is currently only for discussion to get the upported SDK driver
changes in a good shape.

patches are upported from mtk SDK:
- https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/refs/heads/master/master/files/target/linux/mediatek/patches-6.12/999-eth-08-mtk_eth_soc-add-register-definitions-for-rss-lro-reg.patch
- https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/refs/heads/master/master/files/target/linux/mediatek/patches-6.12/999-eth-09-mtk_eth_soc-add-rss-support.patch
- https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/refs/heads/master/master/files/target/linux/mediatek/patches-6.12/999-eth-10-mtk_eth_soc-add-hw-lro-support.patch
with additional fixes

changes:
v4:
- drop unrelated file
- rss-changes suggested by andrew
  - fix MTK_HW_LRO_RING_NUM macro (add eth)
  - fix MTK_LRO_CTRL_DW[123]_CFG (add reg_map param)
  - fix MTK_RX_DONE_INT (add eth param)
- fix lro reverse christmas tree and LRO params suggested by andrew
- drop mtk_hwlro_stats_ebl and unused IS_HW_LRO_RING (only used in
  properitary debugfs)

v3:
- readded the change dropped in v2 because it was a fix
  for getting RSS working on mt7986
- changes requested by jakub
- reworked coverletter (dropped instructions for configuration)
- name all PDMA-IRQ the same way
- retested on
  - BPI-R3/mt7986 (RSS needs to be enabled)
  - BPI-R4/mt7988
  - BPI-R64/mt7622 and BPI-R2/mt7623 for not breaking network functionality

v2:
- drop wrong change (MTK_CDMP_IG_CTRL is only netsys v1)
- Fix immutable string IRQ setup (thx to Emilia Schotte)
- drop links to 6.6 patches/commits in sdk in comments

Mason Chang (3):
  net: ethernet: mtk_eth_soc: Add register definitions for RSS and LRO
  net: ethernet: mtk_eth_soc: Add RSS support
  net: ethernet: mtk_eth_soc: Add LRO support

 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 809 ++++++++++++++++----
 drivers/net/ethernet/mediatek/mtk_eth_soc.h | 168 ++--
 2 files changed, 770 insertions(+), 207 deletions(-)

-- 
2.43.0