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Date:      Tue, 10 Feb 2015 09:28:33 +0100
From:      Gary Jennejohn <gljennjohn@gmail.com>
To:        John Baldwin <jhb@freebsd.org>
Cc:        usb@freebsd.org
Subject:   Re: r276717 causes problems
Message-ID:  <20150210092833.326c9338@ernst.home>
In-Reply-To: <4020134.66atlK9cJ0@ralph.baldwin.cx>
References:  <20150209183648.7825eee5@ernst.home> <54D92612.6000207@selasky.org> <4020134.66atlK9cJ0@ralph.baldwin.cx>

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On Mon, 09 Feb 2015 16:31:32 -0500
John Baldwin <jhb@freebsd.org> wrote:

> On Monday, February 09, 2015 10:26:42 PM Hans Petter Selasky wrote:
> > Hi John,
> > 
> > Do all PCI busses support 64-bit DMA busmaster? Do we reflect this in
> > the busdma tags passed down to device drivers?
> 
> Yes, barring weird quirks.  Even pre-PCI-e had a way to support 64-bit 
> addresses for cards on a 32-bit bus using dual address cycles.  Gary, do you 
> only have problems with xhci and not other PCI devices in your system?
> 

I only have problems with the disk enclosure.  USB3 docking stations
and USB3 hubs work just fine when attached to the USB3 card.
That's why I concluded that it's a problem with the JMicro
bridge chip.

I only have a graphics card and this USB3 card plugged into PCIe.

-- 
Gary Jennejohn



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