netdev - [PATCH net-next v5 0/7] net: lan966x: Extend xdp support

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Date:   Wed, 23 Nov 2022 21:31:32 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <bpf@...r.kernel.org>
CC:     <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <ast@...nel.org>, <daniel@...earbox.net>,
        <hawk@...nel.org>, <john.fastabend@...il.com>,
        <UNGLinuxDriver@...rochip.com>, <alexandr.lobakin@...el.com>,
        <maciej.fijalkowski@...el.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next v5 0/7] net: lan966x: Extend xdp support

Extend the current support of XDP in lan966x with the action XDP_TX and
XDP_REDIRECT.
The first patches just prepare the things such that it would be easier
to add XDP_TX and XDP_REDIRECT actions. Like adding XDP_PACKET_HEADROOM,
introduce helper functions, use the correct dma_dir for the page pool
The last 2 patches introduce the XDP actions XDP_TX and XDP_REDIRECT.

v4->v5:
- add iterator declaration inside for loops
- move the scope of port inside the function lan966x_fdma_rx_alloc_page_pool
- create union for skb and xdpf inside struct lan966x_tx_dcb_buf

v3->v4:
- use napi_consume_skb instead of dev_kfree_skb_any
- arrange members in struct lan966x_tx_dcb_buf not to have holes
- fix when xdp program is added the check for determining if page pool
  needs to be recreated was wrong
- change type for len in lan966x_tx_dcb_buf to u32

v2->v3:
- make sure to update rxq memory model
- update the page pool direction if there is any xdp program
- in case of action XDP_TX give back to reuse the page
- in case of action XDP_REDIRECT, remap the frame and make sure to
  unmap it when is transmitted.

v1->v2:
- use skb_reserve of using skb_put and skb_pull
- make sure that data_len doesn't include XDP_PACKET_HEADROOM


Horatiu Vultur (7):
  net: lan966x: Add XDP_PACKET_HEADROOM
  net: lan966x: Introduce helper functions
  net: lan966x: Add len field to lan966x_tx_dcb_buf
  net: lan966x: Update rxq memory model
  net: lan966x: Update dma_dir of page_pool_params
  net: lan966x: Add support for XDP_TX
  net: lan966x: Add support for XDP_REDIRECT

 .../ethernet/microchip/lan966x/lan966x_fdma.c | 264 +++++++++++++++---
 .../ethernet/microchip/lan966x/lan966x_main.c |   5 +-
 .../ethernet/microchip/lan966x/lan966x_main.h |  30 +-
 .../ethernet/microchip/lan966x/lan966x_xdp.c  |  66 ++++-
 4 files changed, 312 insertions(+), 53 deletions(-)

-- 
2.38.0