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Message-ID: <4659EA05.6070402@gmail.com>
Date: Mon, 28 May 2007 00:28:53 +0400
From: Manu Abraham <abraham.manu@gmail.com>
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To: Grant Grundler <grundler@parisc-linux.org>
CC: linux-pci@atrey.karlin.mff.cuni.cz, linux-kernel@vger.kernel.org
Subject: Re: PCIE
References: <20070526235515.GA31023@colo.lackof.org> <20070526.170039.119261389.davem@davemloft.net> <20070527001631.GC31023@colo.lackof.org> <20070526.173037.45196275.davem@davemloft.net> <4658D84E.6050807@gmail.com> <20070527014945.GE31023@colo.lackof.org>
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Grant Grundler wrote:
> On Sun, May 27, 2007 at 05:01:02AM +0400, Manu Abraham wrote:
>> David Miller wrote:
>>> True, on sparc64 PCI-E controllers, for example, the MSI vector is
>>> received by the PCI-E host controller, and the host controller turns
>>> this into a cpu format interrupt packet for the system bus.
>> Err .. why would a PCIe controller be CPU specific ? Looking at Figure
>> 1-6 of the spec, i think it should be CPU independent ?
> 
> To be pedantic, the PCIe controller isn't really CPU specific.
> It's host bus specific. ie the PCI-e controller is a bridge between
> whatever chipset defines the "cache coherency domain" and the PCI-e devices.
> 
>> Excuse me for my ignorance, just that my head has begun to reel after
>> reading through PCIe 1.0 and the device specs, still being inconclusive
>> how to proceed.
> 
> no problem...I suspect you need to figure out why DTL-MMIO isn't working.
> I have never touched DTL and can't be of much help with that.
> 

Have been reading a bit about DTL and so on. Haven't reached anything
much solid yet. Will have something soon i presume.

Thanks for the comments.

Regards,
Manu
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