I've now installed the updated FPGA bitfiles on my VE, and this does
indeed appear to fix the problems I've been seeing. Thanks!
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Title:
Ok, we have managed to fix the problem at the IO FPGA level. The updated
bitfile will be release on the next VE CD (end of this year), in the
meantime interested parties may contact ARM Support in order to get the
fix.
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The lock up was caused by SMSC RX FIFO underruns caused by maginal
timing issue between SMSC and USB host controller. The hack is enforcing
additional wait cycle between accesses. Unfortunately it affects all
peripherals, thus the performance penalty.
What you observe is, I guess, situation when
On Tue, Aug 23, 2011 at 10:29 AM, Paweł Moll pawel.m...@arm.com wrote:
The lock up was caused by SMSC RX FIFO underruns caused by maginal
timing issue between SMSC and USB host controller. The hack is enforcing
additional wait cycle between accesses. Unfortunately it affects all
peripherals,
Comments! and/or proper symbolic names for those magic numbers would
be good for a final patch, of course :)
I thought I made this clear - there will be no final patch :-)
The entity responsible for SMC configuration is Boot Monitor. This
patch is just a hack to confirm (or deny) my theory.
Could anyone give this patch a go? It's just a hack (if I'm right this
will have to go to Boot Monitor, not kernel), but it may improve
Ethernet stability, potentially at some cost of performance loss. Anyway
- let me know.
** Patch added: ve-eth.patch
Hi Pawel,
I ran my network tests 10x without any failures, so this patch helps a
lot. (The tests would usually fail the first time.)
One question, what is this patch actually doing, preventing the transfer
lock-up or recovering from a locked up transfer? The reason I ask is the
transfer rate
On Tue, Jun 28, 2011 at 04:05:57PM -, Ulrich Weigand wrote:
I'm running into this issue with failing network connections on vexpress
while trying to run the GDB testsuite in remote mode ...
Has there been any progress on this bug in the meantime?
I don't believe so.
Taking the network
I'm running into this issue with failing network connections on vexpress
while trying to run the GDB testsuite in remote mode ...
Has there been any progress on this bug in the meantime?
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Just to be sure, I checked the platform data flags for the
vexpress and the SMSC911X_USE_32BIT flag is set.
static struct smsc911x_platform_config v2m_eth_config = {
.flags = SMSC911X_USE_32BIT,
.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
.irq_type
We should raise this with the relevant upstream developer(s).
The general feeling seems to be that this is almost certainly a driver
issue.
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needs a device driver fix, which will not be handled by linaro-linux
project.
** Changed in: linux-linaro
Status: Confirmed = Won't Fix
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** Changed in: linux-linaro-vexpress (Ubuntu)
Status: Confirmed = Invalid
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Title:
Ethernet dies during large file transfers on vexpress
smdkv310 board uses a smsc9215 ethernet controller. I had similar
problem with large file transfers on smdkv310 board (using smsc911x
driver). But if SMSC911X_USE_32BIT flag is added to the driver's
platform data flags, large file transfers did work. I will debug the
issue with 16BIT register/fifo
Setting the priority high.
** Changed in: linux-linaro
Importance: Undecided = High
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Title:
Ethernet dies during large file transfers on
As said above it rather looks like the SMP problems in the smsc driver.
Now, frankly speaking, I totally forgot about this issue, and it looks
that I won't have chance to look into it in the nearest time. But, as we
have ARM Landing Team now (allegedly ;-) maybe this bug should be
assigned to
Can we close this by saying it is a hw issue?
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Title:
Ethernet dies during large file transfers on vexpress
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Hey Paweł,
would you know who to raise this bug to within ARM? We currently don't
have people dedicated to vexpress specific bugs in Linaro, and we're
looking from some help from BSP folks on your side :-)
Thanks!
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Well, I feel it will end on my desk anyway ;-)
I can't commit to any dates right now, but I've put this on my list and
let you keep you informed. Of course I'll have to reproduce it here...
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Ok; I think dmart and Will Deacon were discussing this bug on IRC
earlier and planned getting together tomorrow to see whether they could
do something about smc911x.c.
12:02 wildea01 I had a brief dig in the smsc9118 driver and found a bunch of
problems
[...]
12:03 wildea01 (off the
This needs be assigned to KWG or vexpress landing team.
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Title:
Ethernet dies during large file transfers on vexpress
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We don't have a vexpress landing team; could we escalate this to ARM?
Matt, any good contact to forward this to?
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Title:
Ethernet dies during
Probably the best place to start would be with:
pawel.m...@arm.com
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Title:
Ethernet dies during large file transfers on vexpress
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** Changed in: linux-linaro-vexpress (Ubuntu)
Status: New = Confirmed
** Changed in: linux-linaro
Status: New = Confirmed
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Title:
Matt: Is this still broken in Natty (2.6.37 kernel)?
** Also affects: linux-linaro-vexpress (Ubuntu)
Importance: Undecided
Status: New
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Yes, this still fails in 2.6.37-rc4.
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Title:
Ethernet dies during large file transfers on vexpress
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