diff options
| author |   Song Yoong Siang <yoong.siang.song@intel.com> | 2025-02-16 17:34:26 +0800 |
|---|---|---|
| committer |   Martin KaFai Lau <martin.lau@kernel.org> | 2025-02-20 15:13:45 -0800 |
| commit | ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 (patch) | |
| tree | 144ff9485119fcb5a236f8886a2c79846669d56c /net | |
| parent | Merge branch 'net-timestamp-bpf-extension-to-equip-applications-transparently' (diff) | |
| download | wireguard-linux-ca4419f15abd19ba8be1e109661b60f9f5b6c9f0.tar.xz wireguard-linux-ca4419f15abd19ba8be1e109661b60f9f5b6c9f0.zip | |
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 <sdf@fomichev.me>
Signed-off-by: Song Yoong Siang <yoong.siang.song@intel.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://patch.msgid.link/20250216093430.957880-2-yoong.siang.song@intel.com
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/netdev-genl.c | 2 | ||||
| -rw-r--r-- | net/xdp/xsk.c | 3 |
2 files changed, 5 insertions, 0 deletions
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; } } |