linux-kernel - Re: PCIE

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Message-ID: <4659EA05.6070402@gmail.com>
Date:	Mon, 28 May 2007 00:28:53 +0400
From:	Manu Abraham <abraham.manu@...il.com>
To:	Grant Grundler <grundler@...isc-linux.org>
CC:	linux-pci@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Subject: Re: PCIE

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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