From: Roland Dreier <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
To: Jason Gunthorpe
<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
Cc: Eli Cohen <eli-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>,
"J.L. Burr" <jlburr-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Yevgeny Petrilin
<yevgenyp-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>,
Vladimir Sokolovsky
<vlad-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>,
Eli Cohen <eli-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>
Subject: Re: mlx4 fix for 36-bit bus addresses on 32-bit arch
Date: Fri, 14 Jan 2011 13:26:33 -0800 [thread overview]
Message-ID: <adawrm718ja.fsf@cisco.com> (raw)
In-Reply-To: <20110114172721.GB16535-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> (Jason Gunthorpe's message of "Fri, 14 Jan 2011 10:27:21 -0700")
> > Regardless of whether what I say above is correct or not, wouldn't it
> > be nicer to to define pfn as either u64 or phys_addr_t and avoid the
> > casting?
>
> Good point, the pfn must be stored as phys_addr_t too, otherwise you
> only support a 44 bit physical address space before truncatation
> occures.
Not sure I agree at the moment... eg remap_pfn_range takes unsigned
long. So I don't think things will really work on a 32-bit arch with >
44 bit bus addresses for lots of other reasons.
- R.
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next prev parent reply other threads:[~2011-01-14 21:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-07 2:59 [PATCH 1/1 (resend)] mthca: Modify to support embedded PowerPC platforms J.L. Burr
2011-01-07 5:59 ` Roland Dreier
2011-01-11 4:12 ` Roland Dreier
[not found] ` <adafwt06puj.fsf-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2011-01-12 8:00 ` J.L. Burr
[not found] ` <4D2D5FAD.6030508-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>
2011-01-12 17:53 ` mlx4 fix for 36-bit bus addresses on 32-bit arch (was: [PATCH 1/1 (resend)] mthca: Modify to support embedded PowerPC platforms) Roland Dreier
[not found] ` <adahbde57r7.fsf_-_-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2011-01-13 17:06 ` mlx4 fix for 36-bit bus addresses on 32-bit arch J.L. Burr
[not found] ` <4D2F310B.2010906-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>
2011-01-13 18:44 ` Jason Gunthorpe
[not found] ` <20110113184432.GA9681-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-01-13 22:10 ` Roland Dreier
[not found] ` <ada62ts316q.fsf-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2011-01-13 22:14 ` Jason Gunthorpe
[not found] ` <20110113221454.GB9681-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-01-14 12:46 ` J.L. Burr
2011-01-14 13:09 ` mlx4 fix for 36-bit bus addresses on 32-bit arch (was: [PATCH 1/1 (resend)] mthca: Modify to support embedded PowerPC platforms) Eli Cohen
2011-01-14 17:27 ` Jason Gunthorpe
[not found] ` <20110114172721.GB16535-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-01-14 21:26 ` Roland Dreier [this message]
[not found] ` <adawrm718ja.fsf-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2011-01-14 22:40 ` mlx4 fix for 36-bit bus addresses on 32-bit arch Jason Gunthorpe
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