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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Alexey Dobriyan <adobriyan@sw.ru>, linux-kernel@vger.kernel.org
Subject: Re: tg3 broken after "PCI: Fix bus resource assignment on 32 bits with 64b resources"
Date: Wed, 06 Feb 2008 07:49:52 +1100	[thread overview]
Message-ID: <1202244592.7079.68.camel@pasglop> (raw)
In-Reply-To: <86802c440802050207j60385efbif6f693dc0b1fd297@mail.gmail.com>


> so x86_64 will work well?
> 
> the problem is that BIOS does not assign one resource for you tg3. and
> kernel pcibios_assign_to_unassign (?) try
> to assign resource to your card.

But the kernel shouldn't try to assign a resource in the 64 bits space
to a card behind a bridge... at least not a non-prefetchable resource
since those can't be forwarded (P2P bridges only define a 32 bits window
for non-prefetchable resources).

So it does look to me like the kernel may be doing something wrong. I
haven't had a chance to look at the logs in details yet (just woke up).

> revert the patch happen to work, you only have 2g less RAM (?), so
> 0x8000000 still can be used.
> 
> sometime you could get hang if your MB have two HT chains. ...because
> BIOS already allocate two io range for the two chain.
> and kernel may assign resource from the range1 belong to HT1 to device
> under HT0.
> solution: need pci root bios to provide _CRS to replace...
> and i have one patch but it only take care of 64 bit kernel for this case.
> 
> 
> easy solution for you: try to get one updated BIOS.



  reply	other threads:[~2008-02-05 20:51 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-04 15:12 Alexey Dobriyan
2008-02-04 21:54 ` Benjamin Herrenschmidt
2008-02-05  9:17   ` Alexey Dobriyan
2008-02-05 10:07     ` Yinghai Lu
2008-02-05 20:49       ` Benjamin Herrenschmidt [this message]
2008-02-06 10:05         ` Alexey Dobriyan
2008-02-06 10:40           ` Yinghai Lu
2008-02-06 21:15           ` Benjamin Herrenschmidt
2008-02-07 10:07             ` Alexey Dobriyan
2008-02-06  1:05     ` Benjamin Herrenschmidt
2008-02-04 21:57 ` Benjamin Herrenschmidt
2008-02-04 21:59 ` Benjamin Herrenschmidt
2008-02-13 22:52 ` Rafael J. Wysocki
2008-02-13 23:01   ` Benjamin Herrenschmidt
2008-02-13 23:03   ` Alexey Dobriyan
2008-02-13 23:06     ` Rafael J. Wysocki

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