netdev - Re: [PATCH net-next 1/2] net: airoha: Add the capability to consume out-of-order DMA tx descriptors

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Message-ID: <e1aa32e9-a545-4ef8-bc23-367243f0835d@intel.com>
Date: Mon, 3 Nov 2025 15:32:19 -0800
From: Jacob Keller <jacob.e.keller@...el.com>
To: Lorenzo Bianconi <lorenzo@...nel.org>, Andrew Lunn
	<andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>, "Eric
 Dumazet" <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>
CC: <linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>, <netdev@...r.kernel.org>, Xuegang Lu
	<xuegang.lu@...oha.com>
Subject: Re: [PATCH net-next 1/2] net: airoha: Add the capability to consume
 out-of-order DMA tx descriptors



On 11/3/2025 2:27 AM, Lorenzo Bianconi wrote:
> EN7581 and AN7583 SoCs are capable of DMA mapping non-linear tx skbs on
> non-consecutive DMA descriptors. This feature is useful when multiple
> flows are queued on the same hw tx queue since it allows to fully utilize
> the available tx DMA descriptors and to avoid the starvation of
> high-priority flow we have in the current codebase due to head-of-line
> blocking introduced by low-priority flows.
> 
> Tested-by: Xuegang Lu <xuegang.lu@...oha.com>
> Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
> ---
>  drivers/net/ethernet/airoha/airoha_eth.c | 87 +++++++++++++++-----------------
>  drivers/net/ethernet/airoha/airoha_eth.h |  7 ++-
>  2 files changed, 47 insertions(+), 47 deletions(-)
> 
> diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
> index 688faf999e4c0a30d53a25877b4a81a33ec7fca2..b717e3efe53cc9c86be8a39e7f9b03cc592e7281 100644
> --- a/drivers/net/ethernet/airoha/airoha_eth.c
> +++ b/drivers/net/ethernet/airoha/airoha_eth.c
> @@ -892,19 +892,13 @@ static int airoha_qdma_tx_napi_poll(struct napi_struct *napi, int budget)
>  

Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>


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