From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Stanislav Fomichev <sdf@google.com>,
Tariq Toukan <ttoukan.linux@gmail.com>
Cc: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
andrii@kernel.org, martin.lau@linux.dev, song@kernel.org,
yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org,
haoluo@google.com, jolsa@kernel.org,
Tariq Toukan <tariqt@nvidia.com>,
Saeed Mahameed <saeedm@nvidia.com>,
David Ahern <dsahern@gmail.com>, Jakub Kicinski <kuba@kernel.org>,
Willem de Bruijn <willemb@google.com>,
Jesper Dangaard Brouer <brouer@redhat.com>,
Anatoly Burakov <anatoly.burakov@intel.com>,
Alexander Lobakin <alexandr.lobakin@intel.com>,
Magnus Karlsson <magnus.karlsson@gmail.com>,
Maryam Tahhan <mtahhan@redhat.com>,
xdp-hints@xdp-project.net, netdev@vger.kernel.org
Subject: [xdp-hints] Re: [PATCH bpf-next v7 15/17] net/mlx5e: Introduce wrapper for xdp_buff
Date: Thu, 12 Jan 2023 22:09:17 +0100 [thread overview]
Message-ID: <87k01rfojm.fsf@toke.dk> (raw)
In-Reply-To: <CAKH8qBsUOdRax0m5XM8guudSX_VYpJuMz_mzdMJegDsq4_ezwA@mail.gmail.com>
Stanislav Fomichev <sdf@google.com> writes:
> On Thu, Jan 12, 2023 at 12:07 AM Tariq Toukan <ttoukan.linux@gmail.com> wrote:
>>
>>
>>
>> On 12/01/2023 2:32, Stanislav Fomichev wrote:
>> > From: Toke Høiland-Jørgensen <toke@redhat.com>
>> >
>> > Preparation for implementing HW metadata kfuncs. No functional change.
>> >
>> > Cc: Tariq Toukan <tariqt@nvidia.com>
>> > Cc: Saeed Mahameed <saeedm@nvidia.com>
>> > Cc: John Fastabend <john.fastabend@gmail.com>
>> > Cc: David Ahern <dsahern@gmail.com>
>> > Cc: Martin KaFai Lau <martin.lau@linux.dev>
>> > Cc: Jakub Kicinski <kuba@kernel.org>
>> > Cc: Willem de Bruijn <willemb@google.com>
>> > Cc: Jesper Dangaard Brouer <brouer@redhat.com>
>> > Cc: Anatoly Burakov <anatoly.burakov@intel.com>
>> > Cc: Alexander Lobakin <alexandr.lobakin@intel.com>
>> > Cc: Magnus Karlsson <magnus.karlsson@gmail.com>
>> > Cc: Maryam Tahhan <mtahhan@redhat.com>
>> > Cc: xdp-hints@xdp-project.net
>> > Cc: netdev@vger.kernel.org
>> > Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
>> > Signed-off-by: Stanislav Fomichev <sdf@google.com>
>> > ---
>> > drivers/net/ethernet/mellanox/mlx5/core/en.h | 1 +
>> > .../net/ethernet/mellanox/mlx5/core/en/xdp.c | 3 +-
>> > .../net/ethernet/mellanox/mlx5/core/en/xdp.h | 6 +-
>> > .../ethernet/mellanox/mlx5/core/en/xsk/rx.c | 25 ++++----
>> > .../net/ethernet/mellanox/mlx5/core/en_rx.c | 58 +++++++++----------
>> > 5 files changed, 50 insertions(+), 43 deletions(-)
>> >
>> > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
>> > index 2d77fb8a8a01..af663978d1b4 100644
>> > --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
>> > +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
>> > @@ -469,6 +469,7 @@ struct mlx5e_txqsq {
>> > union mlx5e_alloc_unit {
>> > struct page *page;
>> > struct xdp_buff *xsk;
>> > + struct mlx5e_xdp_buff *mxbuf;
>>
>> In XSK files below you mix usage of both alloc_units[page_idx].mxbuf and
>> alloc_units[page_idx].xsk, while both fields share the memory of a union.
>>
>> As struct mlx5e_xdp_buff wraps struct xdp_buff, I think that you just
>> need to change the existing xsk field type from struct xdp_buff *xsk
>> into struct mlx5e_xdp_buff *xsk and align the usage.
>
> Hmmm, good point. I'm actually not sure how it works currently.
> mlx5e_alloc_unit.mxbuf doesn't seem to be initialized anywhere? Toke,
> am I missing something?
It's initialised piecemeal in different places; but yeah, we're mixing
things a bit...
> I'm thinking about something like this:
>
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h
> b/drivers/net/ethernet/mellanox/mlx5/core/en.h
> index af663978d1b4..2d77fb8a8a01 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
> @@ -469,7 +469,6 @@ struct mlx5e_txqsq {
> union mlx5e_alloc_unit {
> struct page *page;
> struct xdp_buff *xsk;
> - struct mlx5e_xdp_buff *mxbuf;
> };
Hmm, for consistency with the non-XSK path we should rather go the other
direction and lose the xsk member, moving everything to mxbuf? Let me
give that a shot...
-Toke
next prev parent reply other threads:[~2023-01-12 21:09 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-12 0:32 [xdp-hints] [PATCH bpf-next v7 00/17] xdp: hints via kfuncs Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 01/17] bpf: Document XDP RX metadata Stanislav Fomichev
2023-01-16 13:09 ` [xdp-hints] " Jesper Dangaard Brouer
2023-01-17 20:33 ` Stanislav Fomichev
2023-01-18 14:28 ` Jesper Dangaard Brouer
2023-01-18 17:55 ` Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 02/17] bpf: Rename bpf_{prog,map}_is_dev_bound to is_offloaded Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 03/17] bpf: Move offload initialization into late_initcall Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 04/17] bpf: Reshuffle some parts of bpf/offload.c Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 05/17] bpf: Introduce device-bound XDP programs Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 06/17] selftests/bpf: Update expected test_offload.py messages Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 07/17] bpf: XDP metadata RX kfuncs Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 09/17] veth: Introduce veth_xdp_buff wrapper for xdp_buff Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 10/17] veth: Support RX XDP metadata Stanislav Fomichev
2023-01-16 16:21 ` [xdp-hints] " Jesper Dangaard Brouer
2023-01-17 20:33 ` Stanislav Fomichev
2023-01-18 15:57 ` Jesper Dangaard Brouer
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 11/17] selftests/bpf: Verify xdp_metadata xdp->af_xdp path Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 12/17] net/mlx4_en: Introduce wrapper for xdp_buff Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 13/17] net/mlx4_en: Support RX XDP metadata Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 14/17] xsk: Add cb area to struct xdp_buff_xsk Stanislav Fomichev
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 15/17] net/mlx5e: Introduce wrapper for xdp_buff Stanislav Fomichev
2023-01-12 8:07 ` [xdp-hints] " Tariq Toukan
2023-01-12 19:10 ` Stanislav Fomichev
2023-01-12 21:09 ` Toke Høiland-Jørgensen [this message]
2023-01-12 21:55 ` Toke Høiland-Jørgensen
2023-01-12 22:18 ` Stanislav Fomichev
2023-01-12 22:29 ` Toke Høiland-Jørgensen
2023-01-13 20:55 ` Tariq Toukan
2023-01-13 20:53 ` Tariq Toukan
2023-01-13 21:31 ` Toke Høiland-Jørgensen
2023-01-15 6:59 ` Tariq Toukan
2023-01-15 11:13 ` Toke Høiland-Jørgensen
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 16/17] net/mlx5e: Support RX XDP metadata Stanislav Fomichev
2023-01-12 8:13 ` [xdp-hints] " Tariq Toukan
2023-01-12 19:09 ` Stanislav Fomichev
2023-01-13 20:25 ` Tariq Toukan
2023-01-12 0:32 ` [xdp-hints] [PATCH bpf-next v7 17/17] selftests/bpf: Simple program to dump XDP RX metadata Stanislav Fomichev
2023-01-12 7:29 ` [xdp-hints] Re: [PATCH bpf-next v7 00/17] xdp: hints via kfuncs Martin KaFai Lau
2023-01-12 8:19 ` Tariq Toukan
2023-01-12 18:09 ` Stanislav Fomichev
2023-01-12 18:20 ` Martin KaFai Lau
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