linux-kernel - Re: [PATCH net v3 1/3] ixgbe: allow to increase MTU to 3K with XDP enabled

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Message-ID: <CAL+tcoBnwC7=Z-jNv69R2baQyDgYKsvS8SQtRqLePn6ac_+A6A@mail.gmail.com>
Date:   Wed, 8 Feb 2023 10:09:09 +0800
From:   Jason Xing <kerneljasonxing@...il.com>
To:     Tony Nguyen <anthony.l.nguyen@...el.com>
Cc:     jesse.brandeburg@...el.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        richardcochran@...il.com, ast@...nel.org, daniel@...earbox.net,
        hawk@...nel.org, john.fastabend@...il.com,
        alexandr.lobakin@...el.com, maciej.fijalkowski@...el.com,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        Jason Xing <kernelxing@...cent.com>
Subject: Re: [PATCH net v3 1/3] ixgbe: allow to increase MTU to 3K with XDP enabled

On Wed, Feb 8, 2023 at 3:03 AM Tony Nguyen <anthony.l.nguyen@...el.com> wrote:
>
> On 2/4/2023 5:35 AM, Jason Xing wrote:
> > From: Jason Xing <kernelxing@...cent.com>
>
> ...
>
> > diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> > index ab8370c413f3..2c1b6eb60436 100644
> > --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> > +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> > @@ -6777,6 +6777,18 @@ static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
> >                       ixgbe_free_rx_resources(adapter->rx_ring[i]);
> >   }
> >
> > +/**
> > + * ixgbe_max_xdp_frame_size - returns the maximum allowed frame size for XDP
> > + * @adapter - device handle, pointer to adapter
> > + */
>
> Please use ':' instead of '-' for kdoc
>
> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:6785: warning: Function
> parameter or member 'adapter' not described in 'ixgbe_max_xdp_frame_size'
>
> i.e.
>
> @adapter: device handle, pointer to adapter

Thanks for correcting the format. Now I understand.

Thanks,
Jason

>
> > +static int ixgbe_max_xdp_frame_size(struct ixgbe_adapter *adapter)
> > +{
> > +     if (PAGE_SIZE >= 8192 || adapter->flags2 & IXGBE_FLAG2_RX_LEGACY)
> > +             return IXGBE_RXBUFFER_2K;
> > +     else
> > +             return IXGBE_RXBUFFER_3K;
> > +}
> > +