linux-kernel - Re: [PATCH v3] PCI: al: Add Amazon Annapurna Labs PCIe host controller driver

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Date:   Tue, 16 Apr 2019 14:13:49 +0100
From:   David Woodhouse <dwmw2@...radead.org>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Jonathan Chocron <jonnyc@...zon.com>, linux-pci@...r.kernel.org
Cc:     lorenzo.pieralisi@....com, bhelgaas@...gle.com,
        linux-kernel@...r.kernel.org, vaerov@...zon.com,
        alisaidi@...zon.com, zeev@...zon.com, ronenk@...zon.com,
        barakw@...zon.com, talel@...zon.com, hanochu@...zon.com,
        hhhawa@...zon.com
Subject: Re: [PATCH v3] PCI: al: Add Amazon Annapurna Labs PCIe host
 controller driver

On Tue, 2019-04-09 at 08:57 +1000, Benjamin Herrenschmidt wrote:
> On Thu, 2019-03-28 at 13:57 +0200, Jonathan Chocron wrote:
> > Add support for Amazon's Annapurna Labs PCIe driver. The HW
> > controller
> > is based on DesignWare's IP.
> > 
> > The HW doesn't support accessing the Root Port's config space via
> > ECAM,
> > so we obtain its base address via an AMZN0001 device.
> > 
> > Furthermore, the DesignWare PCIe controller doesn't filter out
> > config
> > transactions sent to devices 1 and up on its bus, so they are
> > filtered
> > by the driver.
> > 
> > All subordinate buses do support ECAM access.
> > 
> > Implementing specific PCI config access functions involves:
> >   - Adding an init function to obtain the Root Port's base address
> > from
> >     an AMZN0001 device.
> >   - Adding a new entry in the MCFG quirk array
> > 
> > Co-developed-by: Vladimir Aerov <vaerov@...zon.com>
> > Signed-off-by: Jonathan Chocron <jonnyc@...zon.com>
> > Signed-off-by: Vladimir Aerov <vaerov@...zon.com>
> > Reviewed-by: David Woodhouse <dwmw@...zon.co.uk>
> 
> Late to the party, sorry :-) That kernel.crashing.org email is on its
> last legs...
> 
> Reviewed-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>

Lorenzo, is there anything else you need from Jonny before this can be
applied?

Thanks.


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