From 50d73710715de7d1a2c88194562f520816af9c2a Mon Sep 17 00:00:00 2001 From: Alexander Lobakin Date: Tue, 12 Dec 2023 15:27:51 +0100 Subject: ethtool: add SET for TCP_DATA_SPLIT ringparam Follow up commit 9690ae604290 ("ethtool: add header/data split indication") and add the set part of Ethtool's header split, i.e. ability to enable/disable header split via the Ethtool Netlink interface. This might be helpful to optimize the setup for particular workloads, for example, to avoid XDP frags, and so on. A driver should advertise ``ETHTOOL_RING_USE_TCP_DATA_SPLIT`` in its ops->supported_ring_params to allow doing that. "Unknown" passed from the userspace when the header split is supported means the driver is free to choose the preferred state. Reviewed-by: Przemek Kitszel Signed-off-by: Alexander Lobakin Link: https://lore.kernel.org/r/20231212142752.935000-2-aleksander.lobakin@intel.com Signed-off-by: Jakub Kicinski --- net/ethtool/rings.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'net/ethtool') diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c index fb09f774ea01..b7865a14fdf8 100644 --- a/net/ethtool/rings.c +++ b/net/ethtool/rings.c @@ -124,6 +124,8 @@ const struct nla_policy ethnl_rings_set_policy[] = { [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 }, [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 }, [ETHTOOL_A_RINGS_RX_BUF_LEN] = NLA_POLICY_MIN(NLA_U32, 1), + [ETHTOOL_A_RINGS_TCP_DATA_SPLIT] = + NLA_POLICY_MAX(NLA_U8, ETHTOOL_TCP_DATA_SPLIT_ENABLED), [ETHTOOL_A_RINGS_CQE_SIZE] = NLA_POLICY_MIN(NLA_U32, 1), [ETHTOOL_A_RINGS_TX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1), [ETHTOOL_A_RINGS_RX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1), @@ -145,6 +147,14 @@ ethnl_set_rings_validate(struct ethnl_req_info *req_info, return -EOPNOTSUPP; } + if (tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT] && + !(ops->supported_ring_params & ETHTOOL_RING_USE_TCP_DATA_SPLIT)) { + NL_SET_ERR_MSG_ATTR(info->extack, + tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT], + "setting TCP data split is not supported"); + return -EOPNOTSUPP; + } + if (tb[ETHTOOL_A_RINGS_CQE_SIZE] && !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) { NL_SET_ERR_MSG_ATTR(info->extack, @@ -202,6 +212,8 @@ ethnl_set_rings(struct ethnl_req_info *req_info, struct genl_info *info) ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod); ethnl_update_u32(&kernel_ringparam.rx_buf_len, tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod); + ethnl_update_u8(&kernel_ringparam.tcp_data_split, + tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT], &mod); ethnl_update_u32(&kernel_ringparam.cqe_size, tb[ETHTOOL_A_RINGS_CQE_SIZE], &mod); ethnl_update_u8(&kernel_ringparam.tx_push, -- cgit v1.2.3