From: David Mosberger <davidm@hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] 64 bit PCI DMA transfers?
Date: Wed, 06 Sep 2000 21:11:33 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590678205459@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590678205458@msgid-missing>
>>>>> On Wed, 6 Sep 2000 12:29:19 -0700 (PDT), Nelson Escobar <nelson@myri.com> said:
Nelson> Doing 64 bit PCI DMA transfers to memory less than 2 gigs
Nelson> works fine. When I use 4 gigs of memory, the physical
Nelson> address of the last 2 gigs seems to be 0x100000000 -
Nelson> 0x17fffffff. When I try doing PCI DMA transfers into this
Nelson> area, everything starts going wrong.
Nelson> Is this a problem with the kernel? Or is it a problem with
Nelson> my driver? or both?
The kernel should handle this fine and if your driver is using the PCI
DMA interface, then it should work, too (assuming it's using it
correctly).
--david
prev parent reply other threads:[~2000-09-06 21:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-09-06 19:29 [Linux-ia64] 64 bit PCI DMA transfers? Nelson Escobar
2000-09-06 21:11 ` David Mosberger [this message]
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