From: nicolas.ferre@atmel•com (Nicolas Ferre)
To: linux-arm-kernel@lists•infradead.org
Subject: macb: zynq: why is SG disabled?
Date: Thu, 2 Jul 2015 09:48:34 +0200 [thread overview]
Message-ID: <5594ECD2.7090701@atmel.com> (raw)
In-Reply-To: <03CA77BA8AF6F1469AEDFBDA1322A7B7495B9EE3@XAP-PVEXMBX02.xlnx.xilinx.com>
Le 02/07/2015 04:33, Punnaiah Choudary Kalluri a ?crit :
> Hi Nicolae and Cyrille,
>
> SG feature was not tested for Zynq using macb driver but tested it using the
> emacps Driver in Xilinx tree (this driver is deprecated recently)
>
> We will test and enable this feature in driver for Zynq.
Ok, fine: we will be glad to merge patches that would enable this
feature on Zynq.
Bye,
>> -----Original Message-----
>> From: Cyrille Pitchen [mailto:cyrille.pitchen at atmel.com]
>> Sent: Wednesday, July 01, 2015 10:34 PM
>> To: Nicolae Rosia; Michal Simek; Punnaiah Choudary Kalluri;
>> netdev at vger.kernel.org; Nicolas Ferre; linux-arm-kernel at lists.infradead.org
>> Subject: Re: macb: zynq: why is SG disabled?
>>
>> Le 01/07/2015 17:14, Nicolae Rosia a ?crit :
>>> Hello,
>>>
>>> After reading the GEM part of Zynq7000 Technical Reference Manual [0], I
>> think that SG should be supported.
>>> Is there a reason why SG is disabled in macb for Zynq?
>>>
>>> Best regards,
>>> Nicolae Rosia
>>
>> Hi Nicolae,
>>
>> when the scatter-gather patch was introduced, the feature was enabled only
>> on tested boards to avoid regressions on other boards.
>> So SG is enabled on sama5d4x and sama5d2x SoCs. SG is disabled on purpose
>> on sama5d3x.
>>
>> For Zynq, I think the feature is still disabled just because it has never been
>> tested.
>>
>> Best regards,
>>
>> Cyrille
>
--
Nicolas Ferre
prev parent reply other threads:[~2015-07-02 7:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <559403E3.3050900@certsign.ro>
2015-07-01 17:04 ` macb: zynq: why is SG disabled? Cyrille Pitchen
2015-07-02 2:33 ` Punnaiah Choudary Kalluri
2015-07-02 7:48 ` Nicolas Ferre [this message]
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