Messages in this thread | | | Subject | Re: [PATCH v1 00/23] ata: sata_dwc_460ex: make it working again | From | Julian Margetson <> | Date | Sun, 24 Apr 2016 13:51:32 -0400 |
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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@apm.com (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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