From: jgunthorpe@obsidianresearch.com (Jason Gunthorpe)
To: linux-arm-kernel@lists.infradead.org
Subject: pci-mvebu driver on km_kirkwood
Date: Mon, 26 Aug 2013 13:16:15 -0600 [thread overview]
Message-ID: <20130826191615.GA20192@obsidianresearch.com> (raw)
In-Reply-To: <521B6AF3.9070909@keymile.com>
On Mon, Aug 26, 2013 at 04:49:23PM +0200, Gerlando Falauto wrote:
> One last question though... what does then the numbering ("@a,b")
> stand for? I assume if the output of a plain (i.e. no params)
> 'lspci' is
It is device,function, but it is only descriptive and not used by
Linux.
> I should only have a "pci at dd,f" node, with the bus numbering being
> imposed by the hierarchy after an actual probing, right?
> So the actual bus number is never listed in the device tree (whereas
> the "@device,function" is). Is that right?
The reg must encode the bus number according to the OF format:
33222222 22221111 11111100 00000000
10987654 32109876 54321098 76543210
phys.hi cell: npt000ss bbbbbbbb dddddfff rrrrrrrr
phys.mid cell: hhhhhhhh hhhhhhhh hhhhhhhh hhhhhhhh
phys.lo cell: llllllll llllllll llllllll llllllll
bbbbbbbb is the 8-bit Bus Number
ddddd is the 5-bit Device Number
fff is the 3-bit Function Number
Others are 0.
Jason
WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: Gerlando Falauto <gerlando.falauto@keymile.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Andrew Lunn <andrew@lunn.ch>, Jason Cooper <jason@lakedaemon.net>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
"Longchamp, Valentin" <Valentin.Longchamp@keymile.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Subject: Re: pci-mvebu driver on km_kirkwood
Date: Mon, 26 Aug 2013 13:16:15 -0600 [thread overview]
Message-ID: <20130826191615.GA20192@obsidianresearch.com> (raw)
In-Reply-To: <521B6AF3.9070909@keymile.com>
On Mon, Aug 26, 2013 at 04:49:23PM +0200, Gerlando Falauto wrote:
> One last question though... what does then the numbering ("@a,b")
> stand for? I assume if the output of a plain (i.e. no params)
> 'lspci' is
It is device,function, but it is only descriptive and not used by
Linux.
> I should only have a "pci@dd,f" node, with the bus numbering being
> imposed by the hierarchy after an actual probing, right?
> So the actual bus number is never listed in the device tree (whereas
> the "@device,function" is). Is that right?
The reg must encode the bus number according to the OF format:
33222222 22221111 11111100 00000000
10987654 32109876 54321098 76543210
phys.hi cell: npt000ss bbbbbbbb dddddfff rrrrrrrr
phys.mid cell: hhhhhhhh hhhhhhhh hhhhhhhh hhhhhhhh
phys.lo cell: llllllll llllllll llllllll llllllll
bbbbbbbb is the 8-bit Bus Number
ddddd is the 5-bit Device Number
fff is the 3-bit Function Number
Others are 0.
Jason
next prev parent reply other threads:[~2013-08-26 19:16 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-10 16:15 pci-mvebu driver on km_kirkwood Gerlando Falauto
2013-07-10 16:57 ` Thomas Petazzoni
2013-07-10 17:31 ` Gerlando Falauto
2013-07-10 19:56 ` Gerlando Falauto
2013-07-11 7:03 ` Valentin Longchamp
2013-07-12 8:59 ` Thomas Petazzoni
2013-07-15 15:46 ` Valentin Longchamp
2013-07-15 19:51 ` Thomas Petazzoni
2013-07-11 14:32 ` Thomas Petazzoni
2014-02-18 17:29 ` Gerlando Falauto
2014-02-18 20:27 ` Thomas Petazzoni
2014-02-19 8:38 ` Gerlando Falauto
2014-02-19 9:26 ` Thomas Petazzoni
2014-02-19 9:39 ` Gerlando Falauto
2014-02-19 13:37 ` Thomas Petazzoni
2014-02-19 13:37 ` Thomas Petazzoni
2014-02-19 21:45 ` Bjorn Helgaas
2014-02-19 21:45 ` Bjorn Helgaas
2014-02-20 8:55 ` Thomas Petazzoni
2014-02-20 8:55 ` Thomas Petazzoni
2014-02-20 17:35 ` Jason Gunthorpe
2014-02-20 17:35 ` Jason Gunthorpe
2014-02-20 20:29 ` Thomas Petazzoni
2014-02-20 20:29 ` Thomas Petazzoni
2014-02-21 0:32 ` Jason Gunthorpe
2014-02-21 0:32 ` Jason Gunthorpe
2014-02-21 8:34 ` Thomas Petazzoni
2014-02-21 8:34 ` Thomas Petazzoni
2014-02-21 8:58 ` Gerlando Falauto
2014-02-21 8:58 ` Gerlando Falauto
2014-02-21 9:12 ` Thomas Petazzoni
2014-02-21 9:12 ` Thomas Petazzoni
2014-02-21 9:16 ` Gerlando Falauto
2014-02-21 9:16 ` Gerlando Falauto
2014-02-21 9:39 ` Thomas Petazzoni
2014-02-21 9:39 ` Thomas Petazzoni
2014-02-21 12:24 ` Gerlando Falauto
2014-02-21 12:24 ` Gerlando Falauto
2014-02-21 13:47 ` Thomas Petazzoni
2014-02-21 13:47 ` Thomas Petazzoni
2014-02-21 15:05 ` Arnd Bergmann
2014-02-21 15:05 ` Arnd Bergmann
2014-02-21 15:11 ` Thomas Petazzoni
2014-02-21 15:11 ` Thomas Petazzoni
2014-02-21 15:20 ` Arnd Bergmann
2014-02-21 15:20 ` Arnd Bergmann
2014-02-21 15:37 ` Thomas Petazzoni
2014-02-21 15:37 ` Thomas Petazzoni
2014-02-21 16:39 ` Jason Gunthorpe
2014-02-21 16:39 ` Jason Gunthorpe
2014-02-21 17:05 ` Thomas Petazzoni
2014-02-21 17:05 ` Thomas Petazzoni
2014-02-21 17:31 ` Jason Gunthorpe
2014-02-21 17:31 ` Jason Gunthorpe
2014-02-21 18:05 ` Arnd Bergmann
2014-02-21 18:05 ` Arnd Bergmann
2014-02-21 18:29 ` Gerlando Falauto
2014-02-21 18:29 ` Gerlando Falauto
2014-02-21 18:18 ` Gerlando Falauto
2014-02-21 18:18 ` Gerlando Falauto
2014-02-21 18:45 ` Thomas Petazzoni
2014-02-21 18:45 ` Thomas Petazzoni
2014-02-20 19:18 ` Bjorn Helgaas
2014-02-20 19:18 ` Bjorn Helgaas
2014-02-21 0:24 ` Jason Gunthorpe
2014-02-21 0:24 ` Jason Gunthorpe
2014-02-21 19:05 ` Bjorn Helgaas
2014-02-21 19:05 ` Bjorn Helgaas
2014-02-21 19:21 ` Thomas Petazzoni
2014-02-21 19:21 ` Thomas Petazzoni
2014-02-21 19:53 ` Benjamin Herrenschmidt
2014-02-21 19:53 ` Benjamin Herrenschmidt
2014-02-23 3:43 ` Gavin Shan
2013-07-31 8:03 ` Thomas Petazzoni
2013-07-31 8:26 ` Gerlando Falauto
2013-07-31 9:00 ` Thomas Petazzoni
2013-07-31 20:50 ` Jason Gunthorpe
2013-08-09 14:01 ` Thierry Reding
2013-08-26 9:27 ` Gerlando Falauto
2013-08-26 9:27 ` Gerlando Falauto
2013-08-26 12:02 ` Thierry Reding
2013-08-26 12:02 ` Thierry Reding
2013-08-26 14:49 ` Gerlando Falauto
2013-08-26 14:49 ` Gerlando Falauto
2013-08-26 19:16 ` Jason Gunthorpe [this message]
2013-08-26 19:16 ` Jason Gunthorpe
2013-11-04 14:49 ` Gerlando Falauto
2013-11-04 14:49 ` Gerlando Falauto
2013-11-05 8:13 ` Thierry Reding
2013-11-05 8:13 ` Thierry Reding
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