linux-kernel - [PATCH net-next v3 0/3] net: ti: icssg-prueth: Add native mode XDP support

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Message-ID: <20250224110102.1528552-1-m-malladi@ti.com>
Date: Mon, 24 Feb 2025 16:30:59 +0530
From: Meghana Malladi <m-malladi@...com>
To: <rogerq@...nel.org>, <danishanwar@...com>, <pabeni@...hat.com>,
        <kuba@...nel.org>, <edumazet@...gle.com>, <davem@...emloft.net>,
        <andrew+netdev@...n.ch>
CC: <bpf@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <u.kleine-koenig@...libre.com>, <matthias.schiffer@...tq-group.com>,
        <dan.carpenter@...aro.org>, <m-malladi@...com>,
        <schnelle@...ux.ibm.com>, <diogo.ivo@...mens.com>,
        <glaroque@...libre.com>, <macro@...am.me.uk>,
        <john.fastabend@...il.com>, <hawk@...nel.org>, <daniel@...earbox.net>,
        <ast@...nel.org>, <srk@...com>, Vignesh Raghavendra <vigneshr@...com>
Subject: [PATCH net-next v3 0/3] net: ti: icssg-prueth: Add native mode XDP support

This series adds native XDP support using page_pool.
XDP zero copy support is not included in this patch series.

Patch 1/3: Replaces skb with page pool for Rx buffer allocation
Patch 2/3: Adds prueth_swdata struct for SWDATA for all swdata cases
Patch 3/3: Introduces native mode XDP support

v2: https://lore.kernel.org/all/20250210103352.541052-1-m-malladi@ti.com/

Changes since v2 (v3-v2):
0/3:
- Update cover letter subject line to add details of the driver as suggested by
Jesper Dangaard Brouer <hawk@...nel.org>
1/3:
- few cosmetic changes for all the patches
2/3:
- Fix leaking tx descriptor in emac_tx_complete_packets()
- Free rx descriptor if swdata type is not page in emac_rx_packet()
- Revert back the size of PRUETH_NAV_SW_DATA_SIZE
- Use build time check for prueth_swdata size
- re-write prueth_swdata to have enum type as first member in the struct
and prueth_data union embedded in the struct
3/3:
- Use page_pool contained in the page instead of using passing page_pool
(rx_chn) as part of swdata
- dev_sw_netstats_tx_add() instead of incrementing the stats directly
- Add missing ndev->stats.tx_dropped++ wherever applicable
- Move k3_cppi_desc_pool_alloc() before the DMA mapping for easier cleanup
on failure
- Replace rxp->napi_id with emac->napi_rx.napi_id in prueth_create_xdp_rxqs()

All the above changes have been suggested by Roger Quadros <rogerq@...nel.org>

Roger Quadros (3):
  net: ti: icssg-prueth: Use page_pool API for RX buffer allocation
  net: ti: icssg-prueth: introduce and use prueth_swdata struct for
    SWDATA
  net: ti: icssg-prueth: Add XDP support

 drivers/net/ethernet/ti/Kconfig               |   1 +
 drivers/net/ethernet/ti/icssg/icssg_common.c  | 421 ++++++++++++++----
 drivers/net/ethernet/ti/icssg/icssg_prueth.c  | 128 +++++-
 drivers/net/ethernet/ti/icssg/icssg_prueth.h  |  47 +-
 .../net/ethernet/ti/icssg/icssg_prueth_sr1.c  |  23 +-
 5 files changed, 529 insertions(+), 91 deletions(-)


base-commit: e13b6da7045f997e1a5a5efd61d40e63c4fc20e8
-- 
2.43.0