linux-kernel - Re: [PATCH V3] pci: exynos: split into two parts such as Synopsys part and Exynos part

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Date:	Thu, 12 Sep 2013 16:44:02 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Pratyush Anand <pratyush.anand@...com>
CC:	Jingoo Han <jg1.han@...sung.com>,
	"'Bjorn Helgaas'" <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	"'Kukjin Kim'" <kgene.kim@...sung.com>,
	Mohit KUMAR DCG <Mohit.KUMAR@...com>,
	"'Arnd Bergmann'" <arnd@...db.de>,
	"'Sean Cross'" <xobs@...agi.com>,
	"'Thierry Reding'" <thierry.reding@...il.com>,
	"'SRIKANTH TUMKUR SHIVANAND'" <ts.srikanth@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH V3] pci: exynos: split into two parts such as Synopsys
 part and Exynos part

On Thursday 12 September 2013 04:16 PM, Pratyush Anand wrote:
> On Thu, Sep 12, 2013 at 03:48:03PM +0530, Pratyush Anand wrote:
>> On Thu, Sep 12, 2013 at 06:07:23PM +0800, Kishon Vijay Abraham I wrote:
>>> Hi,
>>>
>>> On Thursday 12 September 2013 03:22 PM, Pratyush Anand wrote:
>>>> Hi Kishon,
>>>>
>>>> On Thu, Sep 12, 2013 at 05:43:40PM +0800, Kishon Vijay Abraham I wrote:
>>>>> Hi,
>>>>>
>>>>> On Thursday 12 September 2013 03:00 PM, Pratyush Anand wrote:
>>>>>> Hi Jingoo,
>>>>>>
>>>>>>
>>>>>> On Thu, Sep 12, 2013 at 03:15:04PM +0800, Jingoo Han wrote:
>>>>>>> On Tuesday 23 July 2013 12:30 PM, Kishon Vijay Abraham I wrote:
>>>>>>>>>> .
>>>>>>>>>> .
>>
>> [...]
>>
>>>>> when I do ifconfig eth0 up, I get *r8169 0000:01:00.0 eth0: link up.*
>>>>> But I dont receive any packets and ping also fails and the tx and rx packet
>>>>> count is also 0. Could it be related to inbound translation?
>>>>
>>>> A PCIe analyser log would tell a definite cause. Most likely either
>>>> inbound translation is not working or INTx/MSI is not working.
>>>
>>> I have enabled only legacy interrupts. Whenever I connect or disconnect
>>> ethernet cable I get link up/link down message and also the interrupt count for
>>> eth0 increases. So I'm not doubting INTx interrupts as such.
> 
> Just a question, what is the MRRS of your RC? if it is 128, can you

it's 512.
> try with passing pci=pcie_bus_peer2peer  in your bootargs.
> 
> Again, analyser will help a lot in diagnosing such issues.

dont have a analyser here :-(

Thanks
Kishon
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