netdev - RE: [Intel-wired-lan] [PATCH iwl-next v9 5/6] igb: Add AF

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Message-ID: <PH0PR11MB5144ED4AE2331EF902E54687E2482@PH0PR11MB5144.namprd11.prod.outlook.com>
Date: Sat, 26 Oct 2024 16:51:32 +0000
From: "Kuruvinakunnel, George" <george.kuruvinakunnel@...el.com>
To: Kurt Kanzenbach <kurt@...utronix.de>, "Nguyen, Anthony L"
	<anthony.l.nguyen@...el.com>, "Kitszel, Przemyslaw"
	<przemyslaw.kitszel@...el.com>
CC: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann
	<daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>, "John
 Fastabend" <john.fastabend@...il.com>, Richard Cochran
	<richardcochran@...il.com>, Sriram Yagnaraman
	<sriram.yagnaraman@...csson.com>, Benjamin Steinke
	<benjamin.steinke@...s-audio.com>, Sebastian Andrzej Siewior
	<bigeasy@...utronix.de>, "Fijalkowski, Maciej"
	<maciej.fijalkowski@...el.com>, "intel-wired-lan@...ts.osuosl.org"
	<intel-wired-lan@...ts.osuosl.org>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "bpf@...r.kernel.org" <bpf@...r.kernel.org>, Sriram
 Yagnaraman <sriram.yagnaraman@....tech>
Subject: RE: [Intel-wired-lan] [PATCH iwl-next v9 5/6] igb: Add AF_XDP
 zero-copy Rx support

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Kurt Kanzenbach
> Sent: Friday, October 18, 2024 1:40 AM
> To: Nguyen, Anthony L <anthony.l.nguyen@...el.com>; Kitszel, Przemyslaw
> <przemyslaw.kitszel@...el.com>
> Cc: David S. Miller <davem@...emloft.net>; Eric Dumazet
> <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni
> <pabeni@...hat.com>; Alexei Starovoitov <ast@...nel.org>; Daniel
> Borkmann <daniel@...earbox.net>; Jesper Dangaard Brouer
> <hawk@...nel.org>; John Fastabend <john.fastabend@...il.com>; Richard
> Cochran <richardcochran@...il.com>; Sriram Yagnaraman
> <sriram.yagnaraman@...csson.com>; Benjamin Steinke
> <benjamin.steinke@...s-audio.com>; Sebastian Andrzej Siewior
> <bigeasy@...utronix.de>; Fijalkowski, Maciej <maciej.fijalkowski@...el.com>;
> intel-wired-lan@...ts.osuosl.org; netdev@...r.kernel.org;
> bpf@...r.kernel.org; Sriram Yagnaraman <sriram.yagnaraman@....tech>;
> Kurt Kanzenbach <kurt@...utronix.de>
> Subject: [Intel-wired-lan] [PATCH iwl-next v9 5/6] igb: Add AF_XDP zero-copy
> Rx support
> 
> From: Sriram Yagnaraman <sriram.yagnaraman@....tech>
> 
> Add support for AF_XDP zero-copy receive path.
> 
> When AF_XDP zero-copy is enabled, the rx buffers are allocated from the xsk
> buff pool using igb_alloc_rx_buffers_zc().
> 
> Use xsk_pool_get_rx_frame_size() to set SRRCTL rx buf size when zero-copy is
> enabled.
> 
> Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@....tech>
> [Kurt: Port to v6.12 and provide napi_id for xdp_rxq_info_reg(),
>        RCT, remove NETDEV_XDP_ACT_XSK_ZEROCOPY, update NTC handling,
>        READ_ONCE() xsk_pool, likelyfy for XDP_REDIRECT case]
> Signed-off-by: Kurt Kanzenbach <kurt@...utronix.de>
> Acked-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
> ---
>  drivers/net/ethernet/intel/igb/igb.h      |   6 +
>  drivers/net/ethernet/intel/igb/igb_main.c |  79 ++++++--
> drivers/net/ethernet/intel/igb/igb_xsk.c  | 294
> +++++++++++++++++++++++++++++-
>  3 files changed, 360 insertions(+), 19 deletions(-)
> 

Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@...el.com>