From: Jan Evert van Grootheest <j.e.van.grootheest@caiway.nl>
To: linux-ide@vger.kernel.org, bzolnier@gmail.com
Subject: DMA on ht6560b?
Date: Mon, 18 Feb 2008 15:13:53 +0100 [thread overview]
Message-ID: <47B992A1.2030008@caiway.nl> (raw)
Hi,
With digging into the code...
I think the ht6560b controller supports DMA. At least it did so in 2.2
(where hdparm could still turn it on). DMA in 2.2 would improve the HD
from about 1M/s to 4M/s. So that's quite interesting.
Also the datasheet claims that there is full ANSI ATA-4a support.
According to the ATA table on wikipedia that should include up to mwdma
2 and udma33.
What's the magic that will turn it on for the ht6560b controller?
I would guess at the [sm]wdma_mask fields in hwif_t? Plus something for
set_dma_mode?
Some help would be appreciated.
Thanks,
Jan Evert
next reply other threads:[~2008-02-18 14:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-18 14:13 Jan Evert van Grootheest [this message]
2008-02-18 14:30 ` DMA on ht6560b? Alan Cox
2008-02-18 15:17 ` Jan Evert van Grootheest
2008-02-18 15:43 ` Alan Cox
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