linux-kernel - Re: [PATCH] arm64: Define HAVE_ARCH_PIO

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Message-ID: <20150714110039.GC16213@arm.com>
Date:	Tue, 14 Jul 2015 12:00:39 +0100
From:	Will Deacon <will.deacon@....com>
To:	David Daney <ddaney.cavm@...il.com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Robert Richter <rrichter@...ium.com>,
	David Daney <david.daney@...ium.com>
Subject: Re: [PATCH] arm64: Define HAVE_ARCH_PIO_SIZE and related symbols.

On Mon, Jul 13, 2015 at 10:31:36PM +0100, David Daney wrote:
> From: David Daney <david.daney@...ium.com>
> 
> Needed to make pci_iomap() work.

Care to elaborate?

AFAICT, mapping an IO bar on arm64 just gives you back a VA into our
PCI_IOBASE region and the ioreadX accessors will just call the readX
macros, so there should be no need for further port adjustment.

Will
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