On 2009-07-14, at 18:58, Marcel Moolenaar wrote:
On Jul 14, 2009, at 2:21 AM, Rafal Jaworowski wrote:
On 2009-07-14, at 10:36, Hans Petter Selasky wrote:
On Tuesday 14 July 2009 10:31:10 Piotr Zięcik wrote:
1) My analysis: Only the data areas are being flushed/
invalidated. No
transfer descriptors are flushed/invalidated. I see no cache
operations
happening on any DMA control structures, even though there are
calls from
EHCI to xxx_pc_flush() and xxx_pc_invalidate().
Probaby you see more on your AT91 device as you know USB stack
internals.
Have you tried to bring up OHCI on you ARM board ?
Not yet. I'm terribly busy with some LibUSB stuff headed for the 8-
current
release. As soon as I find time I will fire off a build and debug.
Please note these problems should be considered as a showstopper
for the release since USB is currently broken on at least three ARM
platforms in the tree (Marvell).
Rafal,
Anything I can do to help?
(as a reminder: I have an Orion board)
Your input on the desired final solution to these issues would be
appreciated. Please see the beginning of this thread (originated on
usb@ ML), where a quick fix was proposed by Piotr. That patch works
around the problems for us (also for some MIPS and noncoherent PPC),
but the problem here is that we believe that using bus dma for the
purpose of cache synchronization is improper in principle, and cpu-
specific calls should be used instead, although Hans is rather
reluctant to embracing the latter path.
BTW: Has pmap been fixed for ARM in 8-current?
Seems like the most critical problems (panics) are resolved and
will be pushed into SVN shortly. In case you'd like to apply the
fix directly, see: http://people.freebsd.org/~raj/patches/arm/pmap-fixes.diff
Good! I was about to start a discussion about reverting
rev. 194459 for now. We're about to start BETA-2 and it
helps (at least Juniper :-) to have 8.0-RELEASE not be
DOA :-)
No worries, we're also looking forward to 8.0 as a great ARM
release :-) I will be following up on that pmap-related stuff, but am
waiting for confirmation from stas@ there are no regressions on AT91
with this patch.
Rafal
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