Date: Sun, 7 Dec 2008 17:19:47 +0100 From: Marius Strobl <marius@alchemy.franken.de> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-current@freebsd.org, Alfred Perlstein <alfred@freebsd.org>, freebsd-usb@freebsd.org Subject: Re: [Serious] busdma bug in -current in relation to USB hardware - review wanted Message-ID: <20081207161947.GA82662@alchemy.franken.de> In-Reply-To: <200812061334.55365.hselasky@c2i.net> References: <20081107082740.GA1334@icarus.home.lan> <200811081023.10058.hselasky@freebsd.org> <200811161408.21562.hselasky@c2i.net> <200812061334.55365.hselasky@c2i.net>
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On Sat, Dec 06, 2008 at 01:34:54PM +0100, Hans Petter Selasky wrote: > Hi, > > After various feedback from several people I have made a new patch proposal > that will fix the busdma problem. > > See: > > http://perforce.freebsd.org/chv.cgi?CH=154181 > > Review wanted! > > I don't know how to patch the psyco interface for SUN. Maybe there is nothing > that needs to be patched? Neither sparc64 nor sun4u has support for bounce buffers; it's not really worth the effort to implement IOMMU-bypass and bounce buffers for the few devices only doing < 32-bit DMA and for >= 32-bit DMA the IOMMU takes care of the address translation for all practical purposes. In any case this isn't specific to psycho(4). Marius
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