linux-kernel - Re: d63e2e1f3df breaks sparc/T5-8

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Message-ID: <CAE9FiQU1gJY1LYrxs+ma5LCTEEe4xmtjRG0aXJ9K_Tsu+m9Wuw@mail.gmail.com>
Date:	Fri, 27 Mar 2015 15:51:48 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	David Miller <davem@...emloft.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	David Ahern <david.ahern@...cle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"sparclinux@...r.kernel.org" <sparclinux@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: d63e2e1f3df breaks sparc/T5-8

On Fri, Mar 27, 2015 at 2:50 PM, David Miller <davem@...emloft.net> wrote:

> All DMA occurs behind an IOMMU and these IOMMUs only
> support 32-bit addressing, therefore dma_addr_t is
> 32-bit on sparc64.
>
> If you want to represent PCI address in some way, you
> absolutely cannot use dma_addr_t as your data type.

Oh no, we missed that for a while.

Hi Bjorn,

I would suggest that we introduce pci_bus_addr_t or pci_addr_t.

    Yinghai
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