netdev - Re: [PATCH bpf-next v2 1/6] xsk: replace ndo_xsk_async_xmit with ndo_xsk

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Message-ID: <a57b5b49-bd03-92af-cc5d-fe11d1d0e437@mellanox.com>
Date:   Tue, 2 Jul 2019 11:42:52 +0000
From:   Maxim Mikityanskiy <maximmi@...lanox.com>
To:     Magnus Karlsson <magnus.karlsson@...el.com>,
        "ast@...nel.org" <ast@...nel.org>
CC:     "bjorn.topel@...el.com" <bjorn.topel@...el.com>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "brouer@...hat.com" <brouer@...hat.com>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "bruce.richardson@...el.com" <bruce.richardson@...el.com>,
        "ciara.loftus@...el.com" <ciara.loftus@...el.com>,
        "jakub.kicinski@...ronome.com" <jakub.kicinski@...ronome.com>,
        "xiaolong.ye@...el.com" <xiaolong.ye@...el.com>,
        "qi.z.zhang@...el.com" <qi.z.zhang@...el.com>,
        "sridhar.samudrala@...el.com" <sridhar.samudrala@...el.com>,
        "kevin.laatz@...el.com" <kevin.laatz@...el.com>,
        "ilias.apalodimas@...aro.org" <ilias.apalodimas@...aro.org>,
        "kiran.patil@...el.com" <kiran.patil@...el.com>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "maciej.fijalkowski@...el.com" <maciej.fijalkowski@...el.com>,
        "maciejromanfijalkowski@...il.com" <maciejromanfijalkowski@...il.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
Subject: Re: [PATCH bpf-next v2 1/6] xsk: replace ndo_xsk_async_xmit with
 ndo_xsk_wakeup

On 2019-07-02 12:21, Magnus Karlsson wrote:
> This commit replaces ndo_xsk_async_xmit with ndo_xsk_wakeup. This new
> ndo provides the same functionality as before but with the addition of
> a new flags field that is used to specifiy if Rx, Tx or both should be
> woken up. The previous ndo only woke up Tx, as implied by the
> name. The i40e and ixgbe drivers (which are all the supported ones)
> are updated with this new interface.

This API change will break build of mlx5 - XSK support for mlx5 was merged.

> This new ndo will be used by the new need_wakeup functionality of XDP
> sockets that need to be able to wake up both Rx and Tx driver
> processing.
> 
> Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>