TCP ZC Rx requires data to be placed neatly into pages, separate from the networking headers. This is not supported by most devices so to make deployment easy this set adds a way for the driver to report support for this feature thru ethtool. The larger scope of configuring splitting headers and data, or DMA scatter seems dauntingly broad, so this set focuses specifically on the question "is this device usable with TCP ZC Rx?". The aim is to avoid a litany of conditions on HW platforms, features, and firmware versions in orchestration systems when the drivers can easily tell their SG config. Jakub Kicinski (2): ethtool: add header/data split indication bnxt: report header-data split state Documentation/networking/ethtool-netlink.rst | 8 ++++++++ drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 3 +++ include/linux/ethtool.h | 2 ++ include/uapi/linux/ethtool_netlink.h | 7 +++++++ net/ethtool/rings.c | 15 ++++++++++----- 5 files changed, 30 insertions(+), 5 deletions(-) -- 2.34.1
