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

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Date:   Tue, 7 Feb 2023 11:03:09 -0800
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     Jason Xing <kerneljasonxing@...il.com>,
        <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>
CC:     <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 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

> +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;
> +}
> +