diff options
| author | Daniel Machon <daniel.machon@microchip.com> | 2026-09-28 21:32:59 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-10-02 13:08:55 -0700 |
| commit | e013b82ed3b251e680401b4f4d541acd99cbe572 (patch) | |
| tree | 7459ad651c5f78592aa85606c2eb0da28c49995c /tools/lib/python/kdoc/python_version.py | |
| parent | ab6268b958f04b9e6fda69ceb5c95dbc9b8141da (diff) | |
net: lan966x: add PCIe FDMA support
Add PCIe FDMA support for lan966x. The PCIe FDMA path uses contiguous
DMA buffers mapped through the endpoint's ATU, with memcpy-based frame
transfer instead of per-page DMA mappings.
With PCIe FDMA, throughput increases from ~33 Mbps (register-based I/O)
to ~620 Mbps on an Intel x86 host with a lan966x PCIe card.
The RX path uses its own copy of lan966x_hw_offload() that reports back
when skb_vlan_untag() frees the skb, so the caller can drop the frame
instead of touching it.
XDP is not supported on this path yet, so do not advertise xdp_features
and reject program attach for PCIe instances.
Tested-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260928-lan966x-pci-fdma-v9-11-a17caf60f89a@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/lib/python/kdoc/python_version.py')
0 files changed, 0 insertions, 0 deletions