From: Gerd Knorr <kraxel@bytesex.org>
To: linux-kernel@vger.kernel.org
Subject: Re: [patch] zero-bounce highmem I/O
Date: 16 Aug 2001 12:14:40 GMT [thread overview]
Message-ID: <slrn9nne9g.8eb.kraxel@bytesex.org> (raw)
In-Reply-To: <20010815.070204.39155321.davem@redhat.com> <20010815.072548.48531893.davem@redhat.com> <20010816135150.X4352@suse.de> <20010816.045642.116348743.davem@redhat.com>
> What if my scsi controller's pci DMA mask is 0x7fffffff or something
> like this? You don't know at the generic layer, and you must provide
> some way for the block device to indicate stuff like this to you.
While we are at it: Is there some portable way to figure whenever I can
do a PCI DMA transfer to some page? On ia32 I can simply look at the
physical address and if it is behind 4G it doesn't work for 32bit PCI
devices. But I think that is not true for architectures which have a
iommu ...
Gerd
next prev parent reply other threads:[~2001-08-16 12:25 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-15 7:50 [patch] zero-bounce highmem I/O Jens Axboe
2001-08-15 9:11 ` David S. Miller
2001-08-15 9:17 ` Jens Axboe
2001-08-15 9:26 ` Jens Axboe
2001-08-15 10:22 ` David S. Miller
2001-08-15 11:13 ` Jens Axboe
2001-08-15 11:47 ` David S. Miller
2001-08-15 12:07 ` Jens Axboe
2001-08-15 12:35 ` David S. Miller
2001-08-15 13:10 ` Jens Axboe
2001-08-15 14:02 ` David S. Miller
2001-08-15 14:25 ` David S. Miller
2001-08-16 11:51 ` Jens Axboe
2001-08-16 11:56 ` David S. Miller
2001-08-16 12:03 ` Jens Axboe
2001-08-16 12:27 ` David S. Miller
2001-08-16 12:48 ` Jens Axboe
2001-08-16 12:56 ` Jens Axboe
2001-08-16 13:08 ` David S. Miller
2001-08-16 12:14 ` Gerd Knorr [this message]
2001-08-16 12:34 ` David S. Miller
2001-08-16 13:35 ` Gerd Knorr
2001-08-16 14:15 ` David S. Miller
2001-08-16 12:28 ` kill alt_address (Re: [patch] zero-bounce highmem I/O) David S. Miller
2001-08-16 5:52 ` [patch] zero-bounce highmem I/O Jens Axboe
2001-08-15 19:20 ` Gérard Roudier
2001-08-16 8:12 ` David S. Miller
[not found] <no.id>
2001-08-16 14:56 ` Alan Cox
2001-08-17 10:18 ` Gerd Knorr
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