From: thomas.petazzoni@free-electrons.com (Thomas Petazzoni)
To: linux-arm-kernel@lists.infradead.org
Subject: address translation for PCIe-to-localbus bridge
Date: Tue, 12 Nov 2013 08:05:12 +0100 [thread overview]
Message-ID: <20131112080512.3992b2e4@skate> (raw)
In-Reply-To: <20131111155050.96290C41ABB@trevor.secretlab.ca>
Dear Grant Likely,
On Mon, 11 Nov 2013 15:50:50 +0000, Grant Likely wrote:
> > So the mbus would register an address xlate for its node that is
> > called instead of ranges parsing. For the example in my last message
> > the FPGA driver would register an xlate that made addresses relative
> > to its own BAR0 address.
>
> There are already bus-specific transations available. Take a look at
> struct of_bus in drivers/of/address.c
Hum, right, but unless I'm wrong the of_busses[] array of struct of_bus
is fixed in drivers/of/address.c, and as it is, there is no way for a
specific bus driver to provide its own struct of_bus. So that would
need to be extended, right?
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Petazzoni <thomas.petazzoni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: Jason Gunthorpe
<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>,
Lior Amsalem <alior-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Gerlando Falauto
<gerlando.falauto-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>,
Ezequiel Garcia
<ezequiel.garcia-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
Gregory Cl??ment
<gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: address translation for PCIe-to-localbus bridge
Date: Tue, 12 Nov 2013 08:05:12 +0100 [thread overview]
Message-ID: <20131112080512.3992b2e4@skate> (raw)
In-Reply-To: <20131111155050.96290C41ABB-WNowdnHR2B42iJbIjFUEsiwD8/FfD2ys@public.gmane.org>
Dear Grant Likely,
On Mon, 11 Nov 2013 15:50:50 +0000, Grant Likely wrote:
> > So the mbus would register an address xlate for its node that is
> > called instead of ranges parsing. For the example in my last message
> > the FPGA driver would register an xlate that made addresses relative
> > to its own BAR0 address.
>
> There are already bus-specific transations available. Take a look at
> struct of_bus in drivers/of/address.c
Hum, right, but unless I'm wrong the of_busses[] array of struct of_bus
is fixed in drivers/of/address.c, and as it is, there is no way for a
specific bus driver to provide its own struct of_bus. So that would
need to be extended, right?
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
--
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next prev parent reply other threads:[~2013-11-12 7:05 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-06 10:27 address translation for PCIe-to-localbus bridge Gerlando Falauto
2013-11-06 10:27 ` Gerlando Falauto
2013-11-06 12:23 ` Thierry Reding
2013-11-06 12:23 ` Thierry Reding
2013-11-06 12:50 ` Gerlando Falauto
2013-11-06 12:50 ` Gerlando Falauto
2013-11-06 17:36 ` Jason Gunthorpe
2013-11-06 17:36 ` Jason Gunthorpe
2013-11-06 18:03 ` Thomas Petazzoni
2013-11-06 18:03 ` Thomas Petazzoni
2013-11-06 18:24 ` Jason Gunthorpe
2013-11-06 18:24 ` Jason Gunthorpe
2013-11-06 19:00 ` Thomas Petazzoni
2013-11-06 19:00 ` Thomas Petazzoni
2013-11-11 15:50 ` Grant Likely
2013-11-11 15:50 ` Grant Likely
2013-11-12 7:05 ` Thomas Petazzoni [this message]
2013-11-12 7:05 ` Thomas Petazzoni
2013-11-12 8:11 ` Gerlando Falauto
2013-11-12 8:11 ` Gerlando Falauto
2013-11-12 8:16 ` Thomas Petazzoni
2013-11-12 8:16 ` Thomas Petazzoni
2013-11-12 8:26 ` Gerlando Falauto
2013-11-12 8:26 ` Gerlando Falauto
2013-11-13 6:26 ` Grant Likely
2013-11-13 6:26 ` Grant Likely
2013-11-12 8:51 ` Grant Likely
2013-11-12 8:51 ` Grant Likely
2013-11-06 18:33 ` Pantelis Antoniou
2013-11-06 18:33 ` Pantelis Antoniou
2013-11-06 18:56 ` Jason Gunthorpe
2013-11-06 18:56 ` Jason Gunthorpe
2013-11-06 19:16 ` Pantelis Antoniou
2013-11-06 19:16 ` Pantelis Antoniou
2013-11-06 19:50 ` Jason Gunthorpe
2013-11-06 19:50 ` Jason Gunthorpe
2013-11-06 19:38 ` Gerlando Falauto
2013-11-06 19:38 ` Gerlando Falauto
2013-11-06 20:07 ` Jason Gunthorpe
2013-11-06 20:07 ` Jason Gunthorpe
2013-11-07 9:07 ` Gerlando Falauto
2013-11-07 9:07 ` Gerlando Falauto
2013-11-07 17:01 ` Jason Gunthorpe
2013-11-07 17:01 ` Jason Gunthorpe
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