From: Roland Dreier <rdreier@cisco.com>
To: ebiederm@xmission.com (Eric W. Biederman)
Cc: Andi Kleen <ak@suse.de>,
linux-kernel@vger.kernel.org, mst@mellanox.co.il,
jackm@mellanox.co.il
Subject: Re: pgprot_writecombine() and PATs on x86
Date: Wed, 25 Apr 2007 11:35:15 -0700 [thread overview]
Message-ID: <adaodlcwbdo.fsf@cisco.com> (raw)
In-Reply-To: <m1abwws3uh.fsf@ebiederm.dsl.xmission.com> (Eric W. Biederman's message of "Wed, 25 Apr 2007 12:31:34 -0600")
> Roland is the mlx4 sane enough to put the memory that needs
> write-combining a prefetchable bar. So several cards can be combined
> together?
Yes, it is in a prefetchable BAR. It's the second half of the second
BAR in:
0d:00.0 InfiniBand: Mellanox Technologies Unknown device 634a (rev a0)
Subsystem: Mellanox Technologies Unknown device 634a
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at fc400000 (64-bit, non-prefetchable) [size=1M]
Memory at d8000000 (64-bit, prefetchable) [size=8M]
Memory at fc3fe000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
but I'm not sure what you mean about combining several cards?
- R.
next prev parent reply other threads:[~2007-04-25 18:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-25 18:02 pgprot_writecombine() and PATs on x86 Roland Dreier
2007-04-25 18:19 ` Andi Kleen
2007-04-25 18:31 ` Eric W. Biederman
2007-04-25 18:35 ` Roland Dreier [this message]
2007-04-25 18:45 ` Eric W. Biederman
2007-04-26 5:43 ` Michael S. Tsirkin
2007-04-26 6:13 ` Eric W. Biederman
2007-04-25 18:33 ` Roland Dreier
2007-04-25 18:41 ` Dave Jones
2007-04-25 19:10 ` Andi Kleen
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