From owner-freebsd-scsi  Wed Mar 22 10:28:18 2000
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Date: Wed, 22 Mar 2000 11:14:47 -0700 (MST)
From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com>
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To: G?rard Roudier <groudier@club-internet.fr>
Cc: scsi@FreeBSD.org
Subject: Re: bus_dmamap_load() and boundaries
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In-Reply-To: <Pine.LNX.4.10.10003210050130.284-100000@linux.local>
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In article <Pine.LNX.4.10.10003210050130.284-100000@linux.local> you wrote:
> 
> Hello,
> 
> Due to errata, some SYMBIOS chip revisions require scatter entries not to
> cross 16 MB boundaries. I can tell bus_dma_tag_create() about a
> `boundary', but this parameter does not seem to apply to bus physical
> scattered chunks returned by bus_dmamap_load(). This parameter seem to
> only apply to memory allocated using bus_dmamem_alloc().
> 
> Is this the expected behaviour or am I missing something?

Boundary support in bus_dmamap_load() just hasn't been implemented yet.
It shouldn't be too hard to add.

--
Justin


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