Re: System fails to connect to iHOS-104 DVD drive with nvidia MCP61 chipset.

[Bruce Link <Bruce@1045.ca>]

On 10/21/2013 8:17 PM, Robert Hancock wrote:
> On Fri, Oct 18, 2013 at 6:04 PM, Bruce Link <Bruce@1045.ca> wrote:
>> On 9/18/2013 5:27 PM, Bruce Link wrote:
>>> On 9/17/2013 8:40 PM, Robert Hancock wrote:
>>>> On Tue, Sep 17, 2013 at 6:35 PM, Bruce Link <Bruce@1045.ca> wrote:
>>>>>> Hello,
>>>>>>
>>>>>> On Fri, Sep 06, 2013 at 07:53:49PM -0600, Robert Hancock wrote:
>>>>>>>> Is there any more information I can supply that would be helpful?
>>>>>>> I'm not quite sure what the next step would be. It's quite possible
>>>>>>> that the NVIDIA driver in Windows is doing some magic to work around
>>>>>>> the problem that we don't know about, but it's hard to say what that
>>>>>>> might be. The fact that the default drivers used in the WinPE boot
>>>>>>> don't seem to work would tend to point toward some kind of hardware
>>>>>>> incompatibility issue.
>>>>>>>
>>>>>>> Tejun, think you poked with some of this stuff before - any ideas?
>>>>>> It has been years since I looked at MCP quirks, of which there are too
>>>>>> many.  It's likely another quirk on the controller side that nvidia
>>>>>> worked around somehow without telling anyone.  Given the history and
>>>>>> that nvidia is out of chipset market, I think it's highly unlikely to
>>>>>> learn what the issue and workaround are without reverse engineering
>>>>>> it.  So, um, no idea.
>>>>>>
>>>>>> Thanks.
>>>>>>
>>>>>> --
>>>>>> tejun
>>>>>> --
>>>>>
>>>>> Robert,
>>>>>
>>>>> I've inquired about this problem with Allen Martin at Nvidia, he had the
>>>>> following reply:
>>>>>
>>>>> /--------SNIP---------------/
>>>>> Hi Bruce, I did work on the Windows SATA driver for those chipsets, so
>>>>> I’m
>>>>> familiar with it. I’m not aware of any of any timing workarounds for any
>>>>> devices in the driver, but it’s certainly true that there are devices
>>>>> that
>>>>> have timing sensitivity, especially around the IDENTIFY command and it
>>>>> may
>>>>> inadvertently work with one driver and not another.
>>>>>
>>>>>   From the bug reports it looks like it’s always timing out on a
>>>>> TEST_UNIT_READY command? I assume this is probably the first command
>>>>> sent
>>>>> down after IDENTIFY to check for presense of a CD in the drive? If so
>>>>> it’s
>>>>> likely the drive is locked up and any command at that point will fail.
>>>>> If
>>>>> you want to test out the theory about it being a timing issue, I would
>>>>> stick
>>>>> some udelay()s in the identify code path, both before and after starting
>>>>> the
>>>>> transfer to see if it makes any difference. Also do you know if the
>>>>> driver
>>>>> does a PHY reset when it resets the link? If not, you can try doing that
>>>>> by
>>>>> writing a 0 to SControl and then restoring it with the original value.
>>>>>
>>>>> Hope this helps,
>>>>>
>>>>> -Allen
>>>>> /--------SNIP---------------/
>>>>>
>>>>> Does this provide any actionable information? I've tried searching for
>>>>> the
>>>>> proper location to impliment these delays in the sata_nv.c and
>>>>> libata-eh.c
>>>>> files but admittedly, am in over my head.
>>>> Don't think there's any earth-shaking revelations but it might be a
>>>> few things to try. First, though, apparently there is a firmware
>>>> update for this drive of at least one revision up (WL0G) available
>>>> from Lite-ON that you could try updating to. (You'll likely need to
>>>> use Windows for that.) Given that it seems broken in at least two
>>>> different environments on this controller, it's possible they fixed
>>>> something related in the drive.
>>> Robert,
>>>
>>> I can report that the new firmware for the drive does not solve the
>>> problem.
>>>
>>> watchtv@teevee:~$ dmesg |grep ata5
>>> [    1.090360] ata5: SATA max UDMA/133 cmd 0x9e0 ctl 0xbe0 bmdma 0xc400
>>> irq 20
>>> [    1.556044] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>>> [    1.564199] ata5.00: ATAPI: ATAPI   iHOS104, WL0G, max UDMA/100
>>> [    1.580140] ata5.00: configured for UDMA/100
>>> [    6.580035] ata5.00: qc timeout (cmd 0xa0)
>>> [    6.580043] ata5.00: TEST_UNIT_READY failed (err_mask=0x4)
>>> [    7.048042] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>>> [    7.072124] ata5.00: configured for UDMA/100
>>> [   12.072029] ata5.00: qc timeout (cmd 0xa0)
>>> [   12.072037] ata5.00: TEST_UNIT_READY failed (err_mask=0x4)
>>> [   12.072041] ata5: limiting SATA link speed to 1.5 Gbps
>>> [   12.072043] ata5.00: limiting speed to UDMA/100:PIO3
>>> [   12.540058] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>>> [   12.564141] ata5.00: configured for UDMA/100
>>> [   17.564038] ata5.00: qc timeout (cmd 0xa0)
>>> [   17.564045] ata5.00: TEST_UNIT_READY failed (err_mask=0x4)
>>> [   17.564048] ata5.00: disabled
>>> [   17.564063] ata5: hard resetting link
>>> [   17.564065] ata5: nv: skipping hardreset on occupied port
>>> [   18.032068] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>>> [   18.032082] ata5: EH complete
>>> watchtv@teevee:~$
>>>
>>> My apologies for not noticing the firmware update earlier. I do recall
>>> checking at one time, though it may have been prior to Sept. 2011.
>>>
>>> Bruce
>> Robert,
>>
>> Writing to you to bump this thread. Is there anything more I can do to
>> troubleshoot this issue?
> A couple of things you could try:
>
> -Does the behavior change if you boot with vs. without a disc in the drive?
>
> -You could try building a kernel with something like adding
> mdelay(1000) at the start of the atapi_eh_clear_ua function in
> drivers/ata/libata-eh.c.You should see an extra 1 second delay (so at
> the very least it should take 6 seconds to timeout rather than 5).  If
> that changes anything then perhaps some kind of timing quirk would
> help the problem.
Robert,

I've recompiled the kernel with the mdelay you suggested. Using that 
kernel, I booted the machine both with and without a BD disk in the 
drive. It didn't work in either case, but the errors were slightly 
different. My results are below.

Is there anything else that could be tried?


With a BD disc in the drive:
watchtv@teevee:~$ dmesg | grep ata5
[    1.068078] ata5: SATA max UDMA/133 cmd 0x9e0 ctl 0xbe0 bmdma 0xc400 
irq 23
[    1.536031] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    1.544131] ata5.00: ATAPI: ATAPI   iHOS104, WL0G, max UDMA/100
[    1.560112] ata5.00: configured for UDMA/100
[    7.552029] ata5.00: qc timeout (cmd 0xa0)
[    7.552036] ata5.00: TEST_UNIT_READY failed (err_mask=0x4)
[    8.020051] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    8.044122] ata5.00: configured for UDMA/100
[   32.816043] ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 
frozen
[   32.816063] ata5.00: cmd a0/01:00:00:60:00/00:00:00:00:00/a0 tag 0 
dma 96 in
[   32.816066] ata5.00: status: { DRDY }
[   32.816072] ata5: hard resetting link
[   32.816074] ata5: nv: skipping hardreset on occupied port
[   33.284042] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[   33.308141] ata5.00: configured for UDMA/100
[   39.296025] ata5.00: qc timeout (cmd 0xa0)
[   39.296032] ata5.00: TEST_UNIT_READY failed (err_mask=0x4)
[   39.296038] ata5: hard resetting link
[   39.296040] ata5: nv: skipping hardreset on occupied port
[   39.764040] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[   39.788137] ata5.00: configured for UDMA/100
[   45.776035] ata5.00: qc timeout (cmd 0xa0)
[   45.776042] ata5.00: TEST_UNIT_READY failed (err_mask=0x4)
[   45.776047] ata5: limiting SATA link speed to 1.5 Gbps
[   45.776050] ata5.00: limiting speed to UDMA/100:PIO3
[   45.776058] ata5: hard resetting link
[   45.776060] ata5: nv: skipping hardreset on occupied port
[   46.244050] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[   46.268138] ata5.00: configured for UDMA/100

Without a BD disc in the drive:
watchtv@teevee:~$ dmesg | grep ata5
[    1.070412] ata5: SATA max UDMA/133 cmd 0x9e0 ctl 0xbe0 bmdma 0xc400 
irq 20
[    1.536043] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    1.544204] ata5.00: ATAPI: ATAPI   iHOS104, WL0G, max UDMA/100
[    1.560149] ata5.00: configured for UDMA/100
[    7.552027] ata5.00: qc timeout (cmd 0xa0)
[    7.552033] ata5.00: TEST_UNIT_READY failed (err_mask=0x5)
[    8.020034] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    8.044127] ata5.00: configured for UDMA/100
[   14.037175] ata5.00: qc timeout (cmd 0xa0)
[   14.037183] ata5.00: TEST_UNIT_READY failed (err_mask=0x5)
[   14.037187] ata5: limiting SATA link speed to 1.5 Gbps
[   14.037190] ata5.00: limiting speed to UDMA/100:PIO3
[   14.504069] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[   14.528288] ata5.00: configured for UDMA/100
[   20.528052] ata5.00: qc timeout (cmd 0xa0)
[   20.528060] ata5.00: TEST_UNIT_READY failed (err_mask=0x5)
[   20.528062] ata5.00: disabled
[   20.528077] ata5: hard resetting link
[   20.528079] ata5: nv: skipping hardreset on occupied port
[   20.996047] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[   20.996062] ata5: EH complete


Thanks
Bruce