On 4/24/2016 11:21 AM, Christian Lamparter wrote:
On Sunday, April 24, 2016 09:05:43 AM Julian Margetson wrote:
On 4/23/2016 3:41 PM, Christian Lamparter wrote:
There's a known errata for the 460EX, with the CPU lockup upon
high AHB traffic:
<http://lists.denx.de/pipermail/u-boot/2008-June/036078.html>
"This patch implements a fix provided by AMCC so that the lockup upon
simultanious traffic on AHB USB OTG, USB 2.0 and SATA doesn't occur
anymore:..."
This should be fixed by u-boot. However, there's no telling if
there's more to this workaround in the dma engine. You could try
to do the testing without anything connected to the USB ports
and disable/remove all usb hcds modules. As for fixing this:
I did a quick search but couldn't find any public information.
There's always support@xxxxxxx (contact them!), or maybe someone
from the Amiga community knows more?
Tested with kernel with all USB disabled. No sata error messages
during the partition copy but the copying is quite slow.
Ok. The CONFIG_DMADEVICES_DEBUG and CONFIG_DMADEVICES_VDEBUG option
have quite a large overhead, if this fixed the issue for now you
could try to disable them and look if the issue comes back or not.
(also, you can drop the mdelay patch if it's still applied). If
the issue doesn't come back, you could add your "Tested-by" tag
too.
Another thing, the sata dwc driver doesn't yet support NCQ. Do you
know if the driver for the Amiga OS does?
so this does appear to be the problem.
So, how to fix this? I know, there's an AHB DMA Arbiter. But I can't
get any documentation for it from AMCC/APM. Maybe denx.de or someone
from the Amiga community knows how to deal with it. In theory, we
could try if limiting the burst length, pending dma request count or
add code to retry failed dma transfers and reinit the usb-cores would
help.
Regards,
Christian
Disabled
CONFIG_DMADEVICES_DEBUG and CONFIG_DMADEVICES_VDEBUG
Still see issues with the USB enabled.
With USB also disabled I was able to finish the partition copy. But
again it is very slow.
(parted) mklabel msdos
Warning: The existing disk label on /dev/sda will be destroyed and all
data on
this disk will be lost. Do you want to continue?
Yes/No? y
(parted) p
Model: ATA WDC WD5000AAKX-0 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
(parted) q
Information: You may need to update /etc/fstab.
root@Amigaone:/home/amigaone# dd if=/dev/sdb6 of=/dev/sda
43597824+0 records in
43597824+0 records out
22322085888 bytes (22 GB, 21 GiB) copied, 2825.93 s, 7.9 MB/s
Regards
Julian
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