From ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 Mon Sep 17 00:00:00 2001 From: Song Yoong Siang Date: Sun, 16 Feb 2025 17:34:26 +0800 Subject: xsk: Add launch time hardware offload support to XDP Tx metadata Extend the XDP Tx metadata framework so that user can requests launch time hardware offload, where the Ethernet device will schedule the packet for transmission at a pre-determined time called launch time. The value of launch time is communicated from user space to Ethernet driver via launch_time field of struct xsk_tx_metadata. Suggested-by: Stanislav Fomichev Signed-off-by: Song Yoong Siang Signed-off-by: Martin KaFai Lau Acked-by: Stanislav Fomichev Acked-by: Jakub Kicinski Link: https://patch.msgid.link/20250216093430.957880-2-yoong.siang.song@intel.com --- net/core/netdev-genl.c | 2 ++ net/xdp/xsk.c | 3 +++ 2 files changed, 5 insertions(+) (limited to 'net') diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c index c18bb53d13fd..55bb58d623ac 100644 --- a/net/core/netdev-genl.c +++ b/net/core/netdev-genl.c @@ -53,6 +53,8 @@ XDP_METADATA_KFUNC_xxx xsk_features |= NETDEV_XSK_FLAGS_TX_TIMESTAMP; if (netdev->xsk_tx_metadata_ops->tmo_request_checksum) xsk_features |= NETDEV_XSK_FLAGS_TX_CHECKSUM; + if (netdev->xsk_tx_metadata_ops->tmo_request_launch_time) + xsk_features |= NETDEV_XSK_FLAGS_TX_LAUNCH_TIME_FIFO; } if (nla_put_u32(rsp, NETDEV_A_DEV_IFINDEX, netdev->ifindex) || diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index 89d2bef96469..41093ea63700 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -742,6 +742,9 @@ static struct sk_buff *xsk_build_skb(struct xdp_sock *xs, goto free_err; } } + + if (meta->flags & XDP_TXMD_FLAGS_LAUNCH_TIME) + skb->skb_mstamp_ns = meta->request.launch_time; } } -- cgit v1.2.3-59-g8ed1b