[PATCH net-next 0/2] net: ntb_netdev: Preserve checksum offload across NTB

From: Koichiro Den

Date: Thu Aug 13 2026 - 23:29:37 EST


ntb_netdev may be used on embedded systems, where CPU resources are
often limited. L4 checksum calculation can therefore become a bottleneck
even when traffic stays within a trusted PCIe fabric.

This small series carries CHECKSUM_PARTIAL state across the NTB link
using opaque per-payload metadata in ntb_transport. Existing peers
continue to use software checksumming. The feature remains disabled by
default and must be enabled explicitly for trusted links.

Best regards,
Koichiro

Koichiro Den (2):
NTB: ntb_transport: Add per-payload client metadata
net: ntb_netdev: Preserve CHECKSUM_PARTIAL across NTB

drivers/net/ntb_netdev.c | 78 +++++++++++++++++++++++++++++++++--
drivers/ntb/ntb_transport.c | 18 +++++---
include/linux/ntb_transport.h | 6 ++-
3 files changed, 91 insertions(+), 11 deletions(-)


base-commit: b3217bdb0091e52887e23896cd82483f7808914a
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2.51.0