From owner-freebsd-arm@FreeBSD.ORG  Mon Jun 29 13:07:33 2009
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From: Piotr =?utf-8?q?Zi=C4=99cik?= <kosmo@semihalf.com>
Organization: Semihalf
To: Hans Petter Selasky <hselasky@c2i.net>
Date: Mon, 29 Jun 2009 15:07:31 +0200
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Cc: freebsd-arm@freebsd.org, freebsd-usb@freebsd.org, thompsa@freebsd.org
Subject: Re: CPU Cache and busdma usage in USB
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Monday 29 June 2009 13:37:41 Hans Petter Selasky napisa=C5=82(a):
>                 if (op & BUS_DMASYNC_POSTREAD) {
>                         if (bpage->vaddr_nocache =3D=3D 0) {
>                                 cpu_dcache_inv_range(bpage->vaddr,
>                                     bpage->datacount);
>                                 cpu_l2cache_inv_range(bpage->vaddr,
>                                     bpage->datacount);
>                         }
>                         bcopy((void *)(bpage->vaddr_nocache !=3D 0 ?
>                             bpage->vaddr_nocache : bpage->vaddr),
>                             (void *)bpage->datavaddr, bpage->datacount);
>                         dmat->bounce_zone->total_bounced++;
>                 }
>
> Change: bpage->vaddr into (bpage->vaddr & ~arm_dcache_align_mask)
> Change: bpage->datacount into (bpage->datacount + (bpage->vaddr &
> arm_dcache_align_mask) + arm_dcache_align_mask - 1) &
> ~arm_dcache_align_mask;

I have checked above changes and I do not observe any changes
is USB behaviour. Problem still exists.

=2D-=20
Best Regards.
Piotr Ziecik