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Date: Thu, 12 Sep 2013 16:16:02 +0530
From: Pratyush Anand <pratyush.anand@st.com>
To: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Jingoo Han <jg1.han@samsung.com>, "'Bjorn Helgaas'" <bhelgaas@google.com>,
        "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
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Subject: Re: [PATCH V3] pci: exynos: split into two parts such as Synopsys
 part and Exynos part
Message-ID: <20130912104602.GC5995@pratyush-vbox>
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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
try with passing pci=pcie_bus_peer2peer  in your bootargs.

Again, analyser will help a lot in diagnosing such issues.

Regards
Pratyush
> > 
> > btw configuring inbound translation once in dw_pcie_host_init enough is it? I
> > mean we use the same registers for configuring outbound translation also no? So
> > doesn't the inbound configuration gets lost?
> 
> No, you write at the same register, but you program direction as
> inbound. There are different resources for each viewport in inbound
> and outbound direction.
> 
> Regards
> Pratyush
> 
> > 
> > Thanks
> > Kishon