From mboxrd@z Thu Jan  1 00:00:00 1970
From: "David S. Miller" <davem@redhat.com>
Date: Thu, 15 May 2003 23:40:53 +0000
Subject: [Linux-ia64] Re: 64 Bits DMA Addresses for Alloc Consistent Interfaces.
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To: linux-ia64@vger.kernel.org

   From: Colin Ngam <cngam@sgi.com>
   Date: Thu, 15 May 2003 17:14:11 -0500
   
   Now, for PCI-X devices, we need to generate an IOMMU mapped DMA
   address that  has the Upper 32 bits non 0s.

Then add a consistent_dma_mask attribute to the device struct,
problem solved.