netdev - Re: [PATCH net-next 2/2] net: stmmac: fix number of tx queues in stmmac

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Message-ID: <54e400ac-69c7-a56e-a7c2-7385dfe0e4a7@synopsys.com>
Date:   Mon, 27 Mar 2017 14:34:46 +0100
From:   Joao Pinto <Joao.Pinto@...opsys.com>
To:     Niklas Cassel <niklas.cassel@...s.com>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Corentin Labbe <clabbe.montjoie@...il.com>,
        <thierry.reding@...il.com>
CC:     <davem@...emloft.net>, <peppe.cavallaro@...com>,
        <alexandre.torgue@...com>, <sergei.shtylyov@...entembedded.com>,
        <f.fainelli@...il.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 2/2] net: stmmac: fix number of tx queues in
 stmmac_poll

Às 2:28 PM de 3/27/2017, Niklas Cassel escreveu:
> 
> 
> On 03/27/2017 11:12 AM, Joao Pinto wrote:
>> Às 10:09 AM de 3/27/2017, Corentin Labbe escreveu:
>>> On Mon, Mar 27, 2017 at 10:04:57AM +0100, Joao Pinto wrote:
>>>> Às 7:26 AM de 3/25/2017, Corentin Labbe escreveu:
>>>>> On Fri, Mar 24, 2017 at 05:16:45PM +0000, Joao Pinto wrote:
>>>>>> For cores that have more than 1 TX queue configured, the kernel would crash,
>>>>>> since only one TX queue is permitted by default.
>>>>>>
>>>>>> Signed-off-by: Joao Pinto <jpinto@...opsys.com>
>>>>>> ---
>>>>>>  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
>>>>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>>>>
>>>>>> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>>>>>> index 3827952..1eab084 100644
>>>>>> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>>>>>> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>>>>>> @@ -3429,7 +3429,7 @@ static int stmmac_poll(struct napi_struct *napi, int budget)
>>>>>>  	struct stmmac_rx_queue *rx_q =
>>>>>>  		container_of(napi, struct stmmac_rx_queue, napi);
>>>>>>  	struct stmmac_priv *priv = rx_q->priv_data;
>>>>>> -	u32 tx_count = priv->dma_cap.number_tx_queues;
>>>>>> +	u32 tx_count = priv->plat->tx_queues_to_use;
>>>>>>  	u32 chan = rx_q->queue_index;
>>>>>>  	u32 work_done = 0;
>>>>>>  	u32 queue = 0;
>>>>>> -- 
>>>>>> 2.9.3
>>>>>>
>>>>>
>>>>> This patch fix the performance issue on dwmac-sun8i only.
>>>>
>>>> Ok, great!
>>>>
>>>
>>> Sorry, in the we, I see that my gigabit dwmac-sun8i didnt work... (but didnt have time to find why).
>>>
>>>>> The dwmac-sunxi is still broken.
>>
>> Ok, let's see what others report.
>>
>>>>>
>>>>
>>>> What is the difference between the setups?
>>>
>>> dwmac-sun8i use chain mode, dwmac-sunxi use ring mode
>>>
>>
>> @Thierry and Niklas: Hi! Your setup is working well with these 2 fix patches?
>>
> 
> Hello Joao,
> 
> I have not tested these 2 patches.
> 
> Previously, when I tested next-20170321, artpec-6 SoC got TX queue timeouts.
> When testing today's linux-next, next-20170327, things are working again :)
> 
> 
> So I guess one of the following patches fixed our problem:
> 
> 270c7759fbbc net: stmmac: add set_mac to the stmmac_ops
> b4f0a6615556 net: stmmac: fix dma operation mode config for older versions
> 33e85b8dd69e net: stmmac: Restore DT backwards-compatibility
> f39768744fd6 net: stmmac: Always enable MAC RX queues
> abe80fdc6ee6 net: stmmac: RX queue routing configuration
> a8f5102af2a7 net: stmmac: TX and RX queue priority configuration
> aff3d9eff843 net: stmmac: enable multiple buffers

Yes for sure :) Great! Thanks.

> 
> Regards,
> Niklas
>