From: Marek Vasut <marex@denx.de>
To: Pratyush Anand <pratyush.anand@st.com>
Cc: Tim Harvey <tharvey@gateworks.com>,
Kishon Vijay Abraham I <kishon@ti.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Bjorn Helgaas <bhelgaas@google.com>, Frank Li <lznuaa@gmail.com>,
Jingoo Han <jg1.han@samsung.com>,
Mohit KUMAR DCG <Mohit.KUMAR@st.com>,
Richard Zhu <r65037@freescale.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Sean Cross <xobs@kosagi.com>, Shawn Guo <shawn.guo@linaro.org>,
Siva Reddy Kallam <siva.kallam@samsung.com>,
Srikanth T Shivanand <ts.srikanth@samsung.com>,
Troy Kisky <troy.kisky@boundarydevices.com>,
Yinghai Lu <yinghai@kernel.org>
Subject: Re: [PATCH RFC] PCI: imx6: remove outbound io/mem ATU region mapping
Date: Tue, 26 Nov 2013 21:46:09 +0100 [thread overview]
Message-ID: <201311262146.09780.marex@denx.de> (raw)
In-Reply-To: <20131023064051.GA7646@pratyush-vbox>
Dear Pratyush Anand,
> Hi,
>
> On Wed, Oct 23, 2013 at 12:55:43PM +0800, Tim Harvey wrote:
> > The IMX6 iATU is used for address translation between the AXI bus
> > address space and PCI address space. This is used for type0 and type1
> > config cycles but is not necessary for outbound io/mem regions.
> >
> > This patch removes the calls that inappropriately re-configures the ATU
> > viewport for outbound memory and IO after config cycles and removes them
> > altogether as they are not necessary.
> >
> > This resolves issues with PCI devices behind switches and has been tested
> > with a Gige device behind a PLX PEX860x switch. More testing is needed
> > for other configurations.
>
> It seems to me that in your controller you have only one view port.
> Also mem_base and mem_bus_addr is same. Thats why it works in your
> case.
MX6 has 4 In/4 Out viewports AFAICT.
Best regards,
Marek Vasut
next prev parent reply other threads:[~2013-11-26 20:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-23 4:55 [PATCH RFC] PCI: imx6: remove outbound io/mem ATU region mapping Tim Harvey
2013-10-23 5:04 ` Marek Vasut
2013-10-23 6:40 ` Pratyush Anand
2013-11-26 20:46 ` Marek Vasut [this message]
2013-11-27 3:50 ` Pratyush Anand
2013-11-27 7:42 ` Richard Zhu
2013-11-27 8:24 ` Marek Vasut
2013-11-27 8:36 ` Pratyush Anand
2013-11-27 8:45 ` Marek Vasut
2013-11-28 5:54 ` Jingoo Han
2013-11-29 2:21 ` Marek Vasut
2013-12-03 3:04 ` Richard Zhu
2013-12-03 9:19 ` Marek Vasut
2013-12-04 2:38 ` Richard Zhu
2013-12-04 15:45 ` Marek Vasut
2013-12-05 0:46 ` Richard Zhu
2013-11-25 23:09 ` Bjorn Helgaas
2013-11-26 20:47 ` Marek Vasut
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