linux-kernel - Re: [PATCH 0/4] PCI: rcar: Add support for ARM64 and multiple instances

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Date:	Thu, 29 Oct 2015 19:48:00 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Phil Edworthy <phil.edworthy@...esas.com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Simon Horman <horms@...ge.net.au>,
	Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-sh@...r.kernel.org" <linux-sh@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/4] PCI: rcar: Add support for ARM64 and multiple
 instances

On Thu, Oct 29, 2015 at 04:44:06PM +0000, Phil Edworthy wrote:
> Hi Wolfram,
> 
> On 29 October 2015 16:40, Wolfram wrote:
> > > Ouch, my bad. I have been working with our out-of-tree BSP for the Salvator-X
> > board on
> > > http://git.kernel.org/cgit/linux/kernel/git/horms/renesas-bsp.git,  rcar-3.0.2
> > tag along
> > > with some patches from colleagues. I hadn't noticed this patch:
> > 
> > Thanks! Any plans for pushing this upstream? We will have the build error
> > otherwise...
> After some digging, that patch won't be accepted upstream. I'm looking into how the
> driver can be modified so it doesn't need to call this, but I don't expect a small or
> imminent fix.

Yes, I'd think so, too. However, a fix for 4.4 would be needed to
prevent having a final release with a build error.

> > > > Any news if this is really HW related?
> > > I found out that the PCIe controller HW only supports 32-bit AXI bus addresses,
> > so it
> > > works fine if you limit the available memory. The driver will need some work to
> > use
> > > the IPMMU at some point.
> > 
> > Ah, okay.
> > 
> > Can you send the dts patches, too? I checked the BSP this time, but to
> > no avail...
> I will once I sort out the arm64 IO resources problem and the MSI problem.

What MSI problem?

And can't you send the DTS patches as RFC so I can add some testing?


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