From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Jakub Kicinski <kuba@kernel.org>
Cc: sameehj@amazon.com, netdev@vger.kernel.org, bpf@vger.kernel.org,
zorik@amazon.com, akiyano@amazon.com, gtzalik@amazon.com,
"Toke Høiland-Jørgensen" <toke@redhat.com>,
"Daniel Borkmann" <borkmann@iogearbox.net>,
"Alexei Starovoitov" <alexei.starovoitov@gmail.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"Alexander Duyck" <alexander.duyck@gmail.com>,
"Jeff Kirsher" <jeffrey.t.kirsher@intel.com>,
"David Ahern" <dsahern@gmail.com>,
"Willem de Bruijn" <willemdebruijn.kernel@gmail.com>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
"Lorenzo Bianconi" <lorenzo@kernel.org>,
"Saeed Mahameed" <saeedm@mellanox.com>,
brouer@redhat.com
Subject: Re: [PATCH RFC v2 19/33] nfp: add XDP frame size to netronome driver
Date: Tue, 14 Apr 2020 16:02:20 +0200 [thread overview]
Message-ID: <20200414160220.7d0f94c8@carbon> (raw)
In-Reply-To: <20200408105344.11d1a33f@kicinski-fedora-PC1C0HJN>
On Wed, 8 Apr 2020 10:53:44 -0700
Jakub Kicinski <kuba@kernel.org> wrote:
> On Wed, 08 Apr 2020 13:52:10 +0200 Jesper Dangaard Brouer wrote:
> > The netronome nfp driver already had a true_bufsz variable
> > that contains what was needed for xdp.frame_sz.
> >
> > Cc: Jakub Kicinski <kuba@kernel.org>
> > Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
> > ---
> > .../net/ethernet/netronome/nfp/nfp_net_common.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
> > index 9bfb3b077bc1..b9b8c30eab33 100644
> > --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
> > +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
> > @@ -1817,6 +1817,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
> > rcu_read_lock();
> > xdp_prog = READ_ONCE(dp->xdp_prog);
> > true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz;
> > + xdp.frame_sz = true_bufsz;
>
> Since this matters only with XDP on - we can set to PAGE_SIZE directly?
Well the value was already calculate for us in true_bufsz, but I can
change that.
> But more importantly the correct value is:
>
> PAGE_SIZE - NFP_NET_RX_BUF_HEADROOM
Thanks for catching that. I will fix.
> as we set hard_start at an offset.
>
> xdp.data_hard_start = rxbuf->frag + NFP_NET_RX_BUF_HEADROOM;
>
> Cause NFP_NET_RX_BUF_HEADROOM is not DMA mapped.
>
> > xdp.rxq = &rx_ring->xdp_rxq;
> > tx_ring = r_vec->xdp_ring;
>
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
next prev parent reply other threads:[~2020-04-14 14:02 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <158634658714.707275.7903484085370879864.stgit@firesoul>
2020-04-08 11:50 ` [PATCH RFC v2 01/33] xdp: add frame size to xdp_buff Jesper Dangaard Brouer
2020-04-08 17:53 ` Jakub Kicinski
2020-04-09 0:48 ` Saeed Mahameed
2020-04-09 1:13 ` Jakub Kicinski
2020-04-09 23:07 ` Saeed Mahameed
2020-04-09 23:27 ` Jakub Kicinski
2020-04-14 14:16 ` Jesper Dangaard Brouer
2020-04-09 0:50 ` Saeed Mahameed
2020-04-16 13:02 ` Jesper Dangaard Brouer
2020-04-17 23:09 ` Saeed Mahameed
2020-04-08 11:50 ` [PATCH RFC v2 02/33] bnxt: add XDP frame size to driver Jesper Dangaard Brouer
2020-04-08 11:50 ` [PATCH RFC v2 03/33] sfc: add XDP frame size Jesper Dangaard Brouer
2020-04-08 11:50 ` [PATCH RFC v2 04/33] mvneta: add XDP frame size to driver Jesper Dangaard Brouer
2020-04-08 11:50 ` [PATCH RFC v2 05/33] net: netsec: Add support for XDP frame size Jesper Dangaard Brouer
2020-04-08 13:09 ` Lorenzo Bianconi
2020-04-14 8:07 ` Jesper Dangaard Brouer
2020-04-08 11:51 ` [PATCH RFC v2 06/33] net: XDP-generic determining " Jesper Dangaard Brouer
2020-04-08 11:51 ` [PATCH RFC v2 07/33] xdp: xdp_frame add member frame_sz and handle in convert_to_xdp_frame Jesper Dangaard Brouer
2020-04-08 11:51 ` [PATCH RFC v2 08/33] xdp: cpumap redirect use frame_sz and increase skb_tailroom Jesper Dangaard Brouer
2020-04-08 11:51 ` [PATCH RFC v2 09/33] veth: adjust hard_start offset on redirect XDP frames Jesper Dangaard Brouer
2020-04-08 11:51 ` [PATCH RFC v2 10/33] veth: xdp using frame_sz in veth driver Jesper Dangaard Brouer
2020-04-08 11:51 ` [PATCH RFC v2 11/33] dpaa2-eth: add XDP frame size Jesper Dangaard Brouer
2020-04-08 11:51 ` [PATCH RFC v2 12/33] hv_netvsc: add XDP frame size to driver Jesper Dangaard Brouer
2020-04-08 14:56 ` Haiyang Zhang
2020-04-08 11:51 ` [PATCH RFC v2 13/33] qlogic/qede: " Jesper Dangaard Brouer
2020-04-08 11:51 ` [PATCH RFC v2 14/33] net: ethernet: ti: add XDP frame size to driver cpsw Jesper Dangaard Brouer
2020-04-08 11:51 ` [PATCH RFC v2 15/33] ena: add XDP frame size to amazon NIC driver Jesper Dangaard Brouer
2020-04-22 8:39 ` Jubran, Samih
2020-04-08 11:51 ` [PATCH RFC v2 16/33] mlx4: add XDP frame size and adjust max XDP MTU Jesper Dangaard Brouer
2020-04-08 12:57 ` Tariq Toukan
2020-04-14 8:19 ` Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 17/33] mlx5: rx queue setup time determine frame_sz for XDP Jesper Dangaard Brouer
2020-04-08 12:52 ` Tariq Toukan
2020-04-16 12:04 ` Jesper Dangaard Brouer
2020-04-09 9:28 ` Maxim Mikityanskiy
2020-04-08 11:52 ` [PATCH RFC v2 18/33] net: thunderx: add XDP frame size Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 19/33] nfp: add XDP frame size to netronome driver Jesper Dangaard Brouer
2020-04-08 17:53 ` Jakub Kicinski
2020-04-14 14:02 ` Jesper Dangaard Brouer [this message]
2020-04-08 11:52 ` [PATCH RFC v2 20/33] tun: add XDP frame size Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 21/33] vhost_net: also populate " Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 22/33] virtio_net: add XDP frame size in two code paths Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 23/33] ixgbe: fix XDP redirect on archs with PAGE_SIZE above 4K Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 24/33] ixgbe: add XDP frame size to driver Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 25/33] ixgbevf: add XDP frame size to VF driver Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 26/33] i40e: add XDP frame size to driver Jesper Dangaard Brouer
2020-04-08 21:48 ` David Miller
2020-04-14 10:16 ` Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 27/33] ice: " Jesper Dangaard Brouer
2020-04-08 11:52 ` [PATCH RFC v2 28/33] xdp: for Intel AF_XDP drivers add XDP frame_sz Jesper Dangaard Brouer
2020-04-08 17:31 ` Björn Töpel
2020-04-09 9:33 ` Maxim Mikityanskiy
2020-04-08 11:53 ` [PATCH RFC v2 29/33] xdp: allow bpf_xdp_adjust_tail() to grow packet size Jesper Dangaard Brouer
2020-04-09 3:31 ` Saeed Mahameed
2020-04-14 12:46 ` Jesper Dangaard Brouer
2020-04-18 3:33 ` Saeed Mahameed
2020-04-14 9:56 ` Jesper Dangaard Brouer
2020-04-14 10:11 ` Toke Høiland-Jørgensen
2020-04-08 11:53 ` [PATCH RFC v2 30/33] xdp: clear grow memory in bpf_xdp_adjust_tail() Jesper Dangaard Brouer
2020-04-08 21:49 ` David Miller
2020-04-14 9:43 ` Jesper Dangaard Brouer
2020-04-08 11:53 ` [PATCH RFC v2 31/33] bpf: add xdp.frame_sz in bpf_prog_test_run_xdp() Jesper Dangaard Brouer
2020-04-08 11:53 ` [PATCH RFC v2 32/33] selftests/bpf: adjust BPF selftest for xdp_adjust_tail Jesper Dangaard Brouer
2020-04-08 11:53 ` [PATCH RFC v2 33/33] selftests/bpf: xdp_adjust_tail add grow tail tests Jesper Dangaard Brouer
2020-04-08 16:55 ` [PATCH RFC v2 00/33] XDP extend with knowledge of frame size Alexei Starovoitov
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