[PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Arnd Bergmann]

A driver must not access the two fields directly but should instead use
the helper functions to set the values and keep a consistent internal
state:

ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?

Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c78f444ad423..fe1d9592956f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4080,8 +4080,8 @@ int stmmac_dvr_probe(struct device *device,
 		goto error_hw_init;
 
 	/* Configure real RX and TX queues */
-	ndev->real_num_rx_queues = priv->plat->rx_queues_to_use;
-	ndev->real_num_tx_queues = priv->plat->tx_queues_to_use;
+	netif_set_real_num_rx_queues(ndev, priv->plat->rx_queues_to_use);
+	netif_set_real_num_tx_queues(ndev, priv->plat->tx_queues_to_use);
 
 	priv->dma_buf_sz = STMMAC_ALIGN(buf_sz);
 
-- 
2.9.0

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[David Miller]

From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 28 Mar 2017 11:48:21 +0200

> A driver must not access the two fields directly but should instead use
> the helper functions to set the values and keep a consistent internal
> state:
> 
> ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
> ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
> 
> Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Applied.

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Corentin Labbe]

On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> Date: Tue, 28 Mar 2017 11:48:21 +0200
> 
> > A driver must not access the two fields directly but should instead use
> > the helper functions to set the values and keep a consistent internal
> > state:
> > 
> > ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
> > ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
> > 
> > Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
> > Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> 
> Applied.

This break my revert patch. (since it patch ("net: stmmac: enable multiple buffers").
Since dwmac-sunxi is still broken, what can I do ? send two revert patch ? or adapt the reverting patch.

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 1364 bytes --]

On Thu, Mar 30, 2017 at 09:45:36AM +0200, Corentin Labbe wrote:
> On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
> > From: Arnd Bergmann <arnd@arndb.de>
> > Date: Tue, 28 Mar 2017 11:48:21 +0200
> > 
> > > A driver must not access the two fields directly but should instead use
> > > the helper functions to set the values and keep a consistent internal
> > > state:
> > > 
> > > ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
> > > ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
> > > 
> > > Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
> > > Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> > 
> > Applied.
> 
> This break my revert patch. (since it patch ("net: stmmac: enable multiple buffers").
> Since dwmac-sunxi is still broken, what can I do ? send two revert patch ? or adapt the reverting patch.

Have you tried if the kcalloc() patch I sent on Tuesday fixes things the
issues introduced by the multiple buffers patch? Niklas reported that it
restores functionality on his setup.

If it makes things work for you as well, we could maybe avoid the revert
altogether.

You can find the patch here:

	https://patchwork.ozlabs.org/patch/744286/

Thierry

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Re: Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Niklas Cassel]

On 03/30/2017 04:34 PM, Thierry Reding wrote:
> On Thu, Mar 30, 2017 at 09:45:36AM +0200, Corentin Labbe wrote:
>> On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
>>> From: Arnd Bergmann <arnd@arndb.de>
>>> Date: Tue, 28 Mar 2017 11:48:21 +0200
>>>
>>>> A driver must not access the two fields directly but should instead use
>>>> the helper functions to set the values and keep a consistent internal
>>>> state:
>>>>
>>>> ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
>>>> ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
>>>>
>>>> Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
>>>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>>>
>>> Applied.
>>
>> This break my revert patch. (since it patch ("net: stmmac: enable multiple buffers").
>> Since dwmac-sunxi is still broken, what can I do ? send two revert patch ? or adapt the reverting patch.
> 
> Have you tried if the kcalloc() patch I sent on Tuesday fixes things the
> issues introduced by the multiple buffers patch? Niklas reported that it
> restores functionality on his setup.
> 
> If it makes things work for you as well, we could maybe avoid the revert
> altogether.

Thierry, I know that you are using DWMAC CORE 4.XX
How many RX queues and how many TX queues have you got?

I'm also using DWMAC CORE 4.XX
We have 2 TX queues and 1 RX queue.

I think that Corentin is using DWMAC CORE 3.XX

I know that Joao is using an IP Prototyping Kit that uses
DWMAC CORE 4.XX (connected via PCIe).
It would be nice if Joao could get an IP Prototyping Kit
based on DWMAC CORE 3.XX.

Doesn't Synopsys have an IP Prototyping Kit based on
DWMAC CORE 3.XX laying around somewhere? :)

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Joao Pinto]

Às 5:35 PM de 3/30/2017, Niklas Cassel escreveu:
> On 03/30/2017 04:34 PM, Thierry Reding wrote:
>> On Thu, Mar 30, 2017 at 09:45:36AM +0200, Corentin Labbe wrote:
>>> On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
>>>> From: Arnd Bergmann <arnd@arndb.de>
>>>> Date: Tue, 28 Mar 2017 11:48:21 +0200
>>>>
>>>>> A driver must not access the two fields directly but should instead use
>>>>> the helper functions to set the values and keep a consistent internal
>>>>> state:
>>>>>
>>>>> ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
>>>>> ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
>>>>>
>>>>> Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
>>>>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>>>>
>>>> Applied.
>>>
>>> This break my revert patch. (since it patch ("net: stmmac: enable multiple buffers").
>>> Since dwmac-sunxi is still broken, what can I do ? send two revert patch ? or adapt the reverting patch.
>>
>> Have you tried if the kcalloc() patch I sent on Tuesday fixes things the
>> issues introduced by the multiple buffers patch? Niklas reported that it
>> restores functionality on his setup.
>>
>> If it makes things work for you as well, we could maybe avoid the revert
>> altogether.
> 
> Thierry, I know that you are using DWMAC CORE 4.XX
> How many RX queues and how many TX queues have you got?
> 
> I'm also using DWMAC CORE 4.XX
> We have 2 TX queues and 1 RX queue.
> 
> I think that Corentin is using DWMAC CORE 3.XX
> 
> I know that Joao is using an IP Prototyping Kit that uses
> DWMAC CORE 4.XX (connected via PCIe).
> It would be nice if Joao could get an IP Prototyping Kit
> based on DWMAC CORE 3.XX.
> 
> Doesn't Synopsys have an IP Prototyping Kit based on
> DWMAC CORE 3.XX laying around somewhere? :)
> 

I requested a prototyping platform with MAC 100 or a MAC 1000 in order to make
more tests, but I don't have an ETA for it yet.

The implication of the multiple buffers patch in 3.xx is some flow change in the
configuration of dma op mode or similar. I would recomend Corentin to dump the
dma & mac registers in the end of the _open function in order to see if the DMA
is really being well configured and is really started.

Thanks.

Joao

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[David Miller]

From: Thierry Reding <treding@nvidia.com>
Date: Thu, 30 Mar 2017 16:34:36 +0200

> On Thu, Mar 30, 2017 at 09:45:36AM +0200, Corentin Labbe wrote:
>> On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
>> > From: Arnd Bergmann <arnd@arndb.de>
>> > Date: Tue, 28 Mar 2017 11:48:21 +0200
>> > 
>> > > A driver must not access the two fields directly but should instead use
>> > > the helper functions to set the values and keep a consistent internal
>> > > state:
>> > > 
>> > > ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
>> > > ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
>> > > 
>> > > Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
>> > > Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>> > 
>> > Applied.
>> 
>> This break my revert patch. (since it patch ("net: stmmac: enable multiple buffers").
>> Since dwmac-sunxi is still broken, what can I do ? send two revert patch ? or adapt the reverting patch.
> 
> Have you tried if the kcalloc() patch I sent on Tuesday fixes things the
> issues introduced by the multiple buffers patch? Niklas reported that it
> restores functionality on his setup.

I think he said yesterday that he did indeed test all of your patches and it
did not fix things for him.

http://marc.info/?l=linux-kernel&m=149076922813085&w=2

I am going to revert the enable multiple buffers commit, and I would ask that
all involved parties work together in the background to resolve all of this.

Thank you.

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Joao Pinto]

Às 6:48 PM de 3/30/2017, David Miller escreveu:
> From: Thierry Reding <treding@nvidia.com>
> Date: Thu, 30 Mar 2017 16:34:36 +0200
> 
>> On Thu, Mar 30, 2017 at 09:45:36AM +0200, Corentin Labbe wrote:
>>> On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
>>>> From: Arnd Bergmann <arnd@arndb.de>
>>>> Date: Tue, 28 Mar 2017 11:48:21 +0200
>>>>
>>>>> A driver must not access the two fields directly but should instead use
>>>>> the helper functions to set the values and keep a consistent internal
>>>>> state:
>>>>>
>>>>> ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
>>>>> ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
>>>>>
>>>>> Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
>>>>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>>>>
>>>> Applied.
>>>
>>> This break my revert patch. (since it patch ("net: stmmac: enable multiple buffers").
>>> Since dwmac-sunxi is still broken, what can I do ? send two revert patch ? or adapt the reverting patch.
>>
>> Have you tried if the kcalloc() patch I sent on Tuesday fixes things the
>> issues introduced by the multiple buffers patch? Niklas reported that it
>> restores functionality on his setup.
> 
> I think he said yesterday that he did indeed test all of your patches and it
> did not fix things for him.
> 
> http://marc.info/?l=linux-kernel&m=149076922813085&w=2
> 
> I am going to revert the enable multiple buffers commit, and I would ask that
> all involved parties work together in the background to resolve all of this.
> 
> Thank you.
> 

@David: Agreed.

@Corentin: Please check if the DMA Engine is well configured and if the dma
rx/tx has started. This is done by dumping the DMA Registers.
Please also check the MAC related registers and dump them in order to have a
clear picture if the IP is being well configured.
This is critial to analise what's hapenning in your setup.

Joao

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Joao Pinto]

Às 11:14 AM de 3/31/2017, Joao Pinto escreveu:
> Às 6:48 PM de 3/30/2017, David Miller escreveu:
>> From: Thierry Reding <treding@nvidia.com>
>> Date: Thu, 30 Mar 2017 16:34:36 +0200
>>
>>> On Thu, Mar 30, 2017 at 09:45:36AM +0200, Corentin Labbe wrote:
>>>> On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
>>>>> From: Arnd Bergmann <arnd@arndb.de>
>>>>> Date: Tue, 28 Mar 2017 11:48:21 +0200
>>>>>
>>>>>> A driver must not access the two fields directly but should instead use
>>>>>> the helper functions to set the values and keep a consistent internal
>>>>>> state:
>>>>>>
>>>>>> ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
>>>>>> ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
>>>>>>
>>>>>> Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
>>>>>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>>>>>
>>>>> Applied.
>>>>
>>>> This break my revert patch. (since it patch ("net: stmmac: enable multiple buffers").
>>>> Since dwmac-sunxi is still broken, what can I do ? send two revert patch ? or adapt the reverting patch.
>>>
>>> Have you tried if the kcalloc() patch I sent on Tuesday fixes things the
>>> issues introduced by the multiple buffers patch? Niklas reported that it
>>> restores functionality on his setup.
>>
>> I think he said yesterday that he did indeed test all of your patches and it
>> did not fix things for him.
>>
>> http://marc.info/?l=linux-kernel&m=149076922813085&w=2
>>
>> I am going to revert the enable multiple buffers commit, and I would ask that
>> all involved parties work together in the background to resolve all of this.

@David: Could you please create a branch in your git tree for us to work on it
until the multiple buffers get stable for everyone? This way the patches could
circulate in the mailing-list with a different target, like stmmac-next or similar.

What do you think?

Joao

>>
>> Thank you.
>>
> 
> @David: Agreed.
> 
> @Corentin: Please check if the DMA Engine is well configured and if the dma
> rx/tx has started. This is done by dumping the DMA Registers.
> Please also check the MAC related registers and dump them in order to have a
> clear picture if the IP is being well configured.
> This is critial to analise what's hapenning in your setup.
> 
> Joao
> 

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[David Miller]

From: Joao Pinto <Joao.Pinto@synopsys.com>
Date: Fri, 31 Mar 2017 11:43:38 +0100

> @David: Could you please create a branch in your git tree for us to work on it
> until the multiple buffers get stable for everyone? This way the patches could
> circulate in the mailing-list with a different target, like stmmac-next or similar.
> 
> What do you think?

Sorry, I'm not going to do that.

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Joao Pinto]

Às 5:57 PM de 3/31/2017, David Miller escreveu:
> From: Joao Pinto <Joao.Pinto@synopsys.com>
> Date: Fri, 31 Mar 2017 11:43:38 +0100
> 
>> @David: Could you please create a branch in your git tree for us to work on it
>> until the multiple buffers get stable for everyone? This way the patches could
>> circulate in the mailing-list with a different target, like stmmac-next or similar.
>>
>> What do you think?
> 
> Sorry, I'm not going to do that.
> 

Ok. I will send the patches normally through the mailing-list.

Thanks.

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Giuseppe CAVALLARO]

Hello Joao

On 3/30/2017 6:42 PM, Joao Pinto wrote:
> Às 5:35 PM de 3/30/2017, Niklas Cassel escreveu:
>> On 03/30/2017 04:34 PM, Thierry Reding wrote:
>>> On Thu, Mar 30, 2017 at 09:45:36AM +0200, Corentin Labbe wrote:
>>>> On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
>>>>> From: Arnd Bergmann <arnd@arndb.de>
>>>>> Date: Tue, 28 Mar 2017 11:48:21 +0200
>>>>>
>>>>>> A driver must not access the two fields directly but should instead use
>>>>>> the helper functions to set the values and keep a consistent internal
>>>>>> state:
>>>>>>
>>>>>> ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
>>>>>> ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
>>>>>>
>>>>>> Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
>>>>>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>>>>> Applied.
>>>> This break my revert patch. (since it patch ("net: stmmac: enable multiple buffers").
>>>> Since dwmac-sunxi is still broken, what can I do ? send two revert patch ? or adapt the reverting patch.
>>> Have you tried if the kcalloc() patch I sent on Tuesday fixes things the
>>> issues introduced by the multiple buffers patch? Niklas reported that it
>>> restores functionality on his setup.
>>>
>>> If it makes things work for you as well, we could maybe avoid the revert
>>> altogether.
>> Thierry, I know that you are using DWMAC CORE 4.XX
>> How many RX queues and how many TX queues have you got?
>>
>> I'm also using DWMAC CORE 4.XX
>> We have 2 TX queues and 1 RX queue.
>>
>> I think that Corentin is using DWMAC CORE 3.XX
>>
>> I know that Joao is using an IP Prototyping Kit that uses
>> DWMAC CORE 4.XX (connected via PCIe).
>> It would be nice if Joao could get an IP Prototyping Kit
>> based on DWMAC CORE 3.XX.
>>
>> Doesn't Synopsys have an IP Prototyping Kit based on
>> DWMAC CORE 3.XX laying around somewhere? :)
>>
> I requested a prototyping platform with MAC 100 or a MAC 1000 in order to make
> more tests, but I don't have an ETA for it yet.
>
> The implication of the multiple buffers patch in 3.xx is some flow change in the
> configuration of dma op mode or similar. I would recomend Corentin to dump the
> dma & mac registers in the end of the _open function in order to see if the DMA
> is really being well configured and is really started.

Old devices managed as stmmac: mac10/100 platform driver have no 
multi-queue support.

It was introduced in the new versions managed by mac1000 but in my opinion
the stmmac driver has to only work with a single queue for tx and rx on ALL
the 3.x versions.

In fact, although the latest series have the multi-queue and channels 
there is
just one IRQ and this is a very poor implementation.
The 3.xx is very different from what we have in the 4.XX (QoS) on this 
part and AV/B.

Nobody has ever asked for having this support in all these years for the 
previous
chips.

Adding this kind of support we'll spend time for having a no useful 
optimization
and risking to break the compatibility with a lot platforms that use 
these chips.

I image, multi-queue stable on 4.XX and no support on all older versions.
Let me know if you share that.

Regards
Peppe

>
> Thanks.
>
> Joao
>
>

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Joao Pinto]

Hello Peppe,

Às 2:07 PM de 4/3/2017, Giuseppe CAVALLARO escreveu:
> Hello Joao
> 
> On 3/30/2017 6:42 PM, Joao Pinto wrote:
>> Às 5:35 PM de 3/30/2017, Niklas Cassel escreveu:
>>> On 03/30/2017 04:34 PM, Thierry Reding wrote:
>>>> On Thu, Mar 30, 2017 at 09:45:36AM +0200, Corentin Labbe wrote:
>>>>> On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
>>>>>> From: Arnd Bergmann <arnd@arndb.de>
>>>>>> Date: Tue, 28 Mar 2017 11:48:21 +0200
>>>>>>
>>>>>>> A driver must not access the two fields directly but should instead use
>>>>>>> the helper functions to set the values and keep a consistent internal
>>>>>>> state:
>>>>>>>
>>>>>>> ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
>>>>>>> ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device'
>>>>>>> has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
>>>>>>>
>>>>>>> Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
>>>>>>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>>>>>> Applied.
>>>>> This break my revert patch. (since it patch ("net: stmmac: enable multiple
>>>>> buffers").
>>>>> Since dwmac-sunxi is still broken, what can I do ? send two revert patch ?
>>>>> or adapt the reverting patch.
>>>> Have you tried if the kcalloc() patch I sent on Tuesday fixes things the
>>>> issues introduced by the multiple buffers patch? Niklas reported that it
>>>> restores functionality on his setup.
>>>>
>>>> If it makes things work for you as well, we could maybe avoid the revert
>>>> altogether.
>>> Thierry, I know that you are using DWMAC CORE 4.XX
>>> How many RX queues and how many TX queues have you got?
>>>
>>> I'm also using DWMAC CORE 4.XX
>>> We have 2 TX queues and 1 RX queue.
>>>
>>> I think that Corentin is using DWMAC CORE 3.XX
>>>
>>> I know that Joao is using an IP Prototyping Kit that uses
>>> DWMAC CORE 4.XX (connected via PCIe).
>>> It would be nice if Joao could get an IP Prototyping Kit
>>> based on DWMAC CORE 3.XX.
>>>
>>> Doesn't Synopsys have an IP Prototyping Kit based on
>>> DWMAC CORE 3.XX laying around somewhere? :)
>>>
>> I requested a prototyping platform with MAC 100 or a MAC 1000 in order to make
>> more tests, but I don't have an ETA for it yet.
>>
>> The implication of the multiple buffers patch in 3.xx is some flow change in the
>> configuration of dma op mode or similar. I would recomend Corentin to dump the
>> dma & mac registers in the end of the _open function in order to see if the DMA
>> is really being well configured and is really started.
> 
> Old devices managed as stmmac: mac10/100 platform driver have no multi-queue
> support.
> 
> It was introduced in the new versions managed by mac1000 but in my opinion
> the stmmac driver has to only work with a single queue for tx and rx on ALL
> the 3.x versions.
> 
> In fact, although the latest series have the multi-queue and channels there is
> just one IRQ and this is a very poor implementation.
> The 3.xx is very different from what we have in the 4.XX (QoS) on this part and
> AV/B.
> 
> Nobody has ever asked for having this support in all these years for the previous
> chips.
> 
> Adding this kind of support we'll spend time for having a no useful optimization
> and risking to break the compatibility with a lot platforms that use these chips.
> 
> I image, multi-queue stable on 4.XX and no support on all older versions.
> Let me know if you share that.

Yes older cores do not support multiple queues and I tried to isolate the
features not to affect older versions.

Do you think that functions as "ndev = alloc_etherdev_mqs" has some sort of
influence?

Thanks.

> 
> Regards
> Peppe
> 
>>
>> Thanks.
>>
>> Joao
>>
>>
> 

Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

[Giuseppe CAVALLARO]

Hello Joao

On 4/3/2017 3:12 PM, Joao Pinto wrote:
> Yes older cores do not support multiple queues and I tried to isolate the
> features not to affect older versions.

ok so we are inline ;-)

>
> Do you think that functions as "ndev = alloc_etherdev_mqs" has some sort of
> influence?

I do not think so is we are passing the right txqs and rxqs values.

Regards
Peppe

>
> Thanks.