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Message-ID: <6568f07418508_fbb8229478@willemb.c.googlers.com.notmuch> Date: Thu, 30 Nov 2023 15:28:36 -0500 From: Willem de Bruijn <willemdebruijn.kernel@...il.com> To: Song Yoong Siang <yoong.siang.song@...el.com>, "David S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Jonathan Corbet <corbet@....net>, Bjorn Topel <bjorn@...nel.org>, Magnus Karlsson <magnus.karlsson@...el.com>, Maciej Fijalkowski <maciej.fijalkowski@...el.com>, Jonathan Lemon <jonathan.lemon@...il.com>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>, John Fastabend <john.fastabend@...il.com>, Stanislav Fomichev <sdf@...gle.com>, Lorenzo Bianconi <lorenzo@...nel.org>, Tariq Toukan <tariqt@...dia.com>, Willem de Bruijn <willemb@...gle.com>, Maxime Coquelin <mcoquelin.stm32@...il.com>, Andrii Nakryiko <andrii@...nel.org>, Mykola Lysenko <mykolal@...com>, Martin KaFai Lau <martin.lau@...ux.dev>, Song Liu <song@...nel.org>, Yonghong Song <yonghong.song@...ux.dev>, KP Singh <kpsingh@...nel.org>, Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>, Shuah Khan <shuah@...nel.org>, Alexandre Torgue <alexandre.torgue@...s.st.com>, Jose Abreu <joabreu@...opsys.com> Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, bpf@...r.kernel.org, xdp-hints@...-project.net, linux-stm32@...md-mailman.stormreply.com, linux-arm-kernel@...ts.infradead.org, linux-kselftest@...r.kernel.org, Song Yoong Siang <yoong.siang.song@...el.com> Subject: Re: [PATCH bpf-next 1/3] xsk: add launch time support to XDP Tx metadata Song Yoong Siang wrote: > This patch extends the XDP Tx metadata framework to include Time-Based > Scheduling (TBS) support where the NIC will schedule a 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@...gle.com> > Signed-off-by: Song Yoong Siang <yoong.siang.song@...el.com> > --- > Documentation/netlink/specs/netdev.yaml | 4 ++++ > Documentation/networking/xsk-tx-metadata.rst | 5 +++++ > include/net/xdp_sock.h | 10 ++++++++++ > include/net/xdp_sock_drv.h | 1 + > include/uapi/linux/if_xdp.h | 9 +++++++++ > include/uapi/linux/netdev.h | 3 +++ > net/core/netdev-genl.c | 2 ++ > net/xdp/xsk.c | 3 +++ > tools/include/uapi/linux/if_xdp.h | 9 +++++++++ > tools/include/uapi/linux/netdev.h | 3 +++ > tools/net/ynl/generated/netdev-user.c | 1 + > 11 files changed, 50 insertions(+) > > diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml > index 00439bcbd2e3..a602776bbfb4 100644 > --- a/Documentation/netlink/specs/netdev.yaml > +++ b/Documentation/netlink/specs/netdev.yaml > @@ -66,6 +66,10 @@ definitions: > name: tx-checksum > doc: > L3 checksum HW offload is supported by the driver. > + - > + name: launch-time > + doc: > + HW Time-Based Scheduling (TBS) is supported by the driver. Can we avoid introducing another term? We already have too many: launchtime, earliest delivery time (EDT), SO_TXTIME, pacing offload, earliest txtime first (ETF).
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