From: Jesse Barnes <jbarnes@engr.sgi.com>
To: arjanv@redhat.com
Subject: Re: 32-bit dma allocations on 64-bit platforms
Date: Thu, 24 Jun 2004 09:48:07 -0400
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Cc: Andi Kleen <ak@muc.de>, Terence Ripperda <tripperda@nvidia.com>,
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On Thursday, June 24, 2004 2:18 am, Arjan van de Ven wrote:
> What is the problem again, can't the driver us the dynamic pci mapping
> API which does allow more memory to be mapped even on crippled machines
> without iommu ?
> And isn't this a problem that will vanish since PCI Express and PCI X
> both *require* support for 64 bit addressing, so all higher speed cards
> are going to be ok in principle ?

Well, PCI-X may require it, but there certainly are PCI-X devices that don't 
do 64 bit addressing, or if they do, it's a crippled implementation (e.g. top 
32 bits have to be constant).

Jesse
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