From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Mark A. Greer" <mgreer@mvista.com>
Cc: linuxppc-dev <Linuxppc-dev@ozlabs.org>
Subject: Re: [PATCH 1/4] powerpc: mv64x60 - Use early_* PCI accessors for hotswap reg
Date: Thu, 17 Jan 2008 13:39:02 +1100 [thread overview]
Message-ID: <1200537542.20581.3.camel@pasglop> (raw)
In-Reply-To: <20080117004744.GC1917@mag.az.mvista.com>
On Wed, 2008-01-16 at 17:47 -0700, Mark A. Greer wrote:
> On Thu, Jan 17, 2008 at 09:48:59AM +1100, Benjamin Herrenschmidt wrote:
> >
> > On Mon, 2008-01-14 at 15:51 -0700, Mark A. Greer wrote:
> > > From: Mark A. Greer <mgreer@mvista.com>
> > >
> > > The mv64x60 Hotswap register is on the first hose of the mv64x60
> > > hostbridge. To access it, manually find the hose structure and
> > > use the early_* PCI accessor routines because the hostbridge is
> > > normally hidden.
> >
> > Can't we unhide the NB instead ?
>
> Hi Ben.
>
> Possibly but it may cause issues since many hostbridge have BARs
> that don't comply with the PCI spec which may get hosed when scanning
> the PCI bus.
True. But it's nice to be able to see their config space.
I tend to use a header quirk to blank the BARs of the host bridge in
those cases. But that does mean that the sizing operation is done on
them (writing ff's etc...) which might be an issue in your case (or
not).
Ben.
prev parent reply other threads:[~2008-01-17 2:39 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-14 22:51 [PATCH 1/4] powerpc: mv64x60 - Use early_* PCI accessors for hotswap reg Mark A. Greer
2008-01-14 22:58 ` [PATCH 2/4] powerpc: mv64x60 - Exit when no hs_reg_valid property Mark A. Greer
2008-01-14 22:59 ` [PATCH 3/4] powerpc: Katana750i - Add DTS file Mark A. Greer
2008-01-14 23:34 ` David Gibson
2008-01-15 19:08 ` Mark A. Greer
2008-01-16 0:22 ` David Gibson
2008-01-16 20:48 ` Mark A. Greer
2008-01-17 1:06 ` David Gibson
2008-01-17 2:28 ` Mark A. Greer
2008-01-16 22:04 ` [PATCH 3/4 v2] " Mark A. Greer
2008-01-14 23:00 ` [PATCH 4/4] powerpc: Katana750i - Add platform support Mark A. Greer
2008-01-14 23:33 ` Stephen Rothwell
2008-01-15 17:36 ` Mark A. Greer
2008-01-16 22:12 ` [PATCH 4/4 v2] " Mark A. Greer
2008-01-16 23:27 ` Stephen Rothwell
2008-01-17 0:35 ` Mark A. Greer
2008-01-17 1:58 ` David Gibson
2008-01-14 23:19 ` [PATCH 1/4] powerpc: mv64x60 - Use early_* PCI accessors for hotswap reg Stephen Rothwell
2008-01-15 17:20 ` Mark A. Greer
2008-01-14 23:21 ` Stephen Rothwell
2008-01-15 17:31 ` Mark A. Greer
2008-01-16 22:00 ` [PATCH 1/4 v2] " Mark A. Greer
2008-01-16 22:48 ` [PATCH 1/4] " Benjamin Herrenschmidt
2008-01-17 0:47 ` Mark A. Greer
2008-01-17 2:39 ` Benjamin Herrenschmidt [this message]
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