[Bug 59672] New: Problems initializing Radeon driver: lockup during IB test

[Bug 59672] New: Problems initializing Radeon driver: lockup during IB test

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

          Priority: medium
            Bug ID: 59672
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Problems initializing Radeon driver: lockup during IB
                    test
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: lucaskt@linux.vnet.ibm.com
          Hardware: PowerPC
            Status: NEW
           Version: XOrg 6.7.0
         Component: DRM/Radeon
           Product: DRI

Created attachment 73396
  --> https://bugs.freedesktop.org/attachment.cgi?id=73396&action=edit
modprobe radeon with drm.debug=1

Hi all,

I've been trying to get a evergreen adapter to work with the Radeon driver on a
ppc64 machine. And while attempting that, I'm running into what seems to be a
infinite loop while running the IB test on ring 3.
I'm using a 3.8.0-rc4 kernel from today.
Follows an excerpt from the logs, the entire modprobe log can be found
attached.

[  171.975487] [drm:evergreen_blit_init], evergreen blit allocated bo 00000600
vs 00000400 ps 00000500
[  171.975631] radeon 0001:01:00.0: WB enabled
[  171.975636] radeon 0001:01:00.0: fence driver on ring 0 use gpu addr
0x0000000020000c00 and cpu addr 0xc0000001d32b0c00
[  171.975642] radeon 0001:01:00.0: fence driver on ring 3 use gpu addr
0x0000000020000c0c and cpu addr 0xc0000001d32b0c0c
[  171.992732] [drm] ring test on 0 succeeded in 0 usecs
[  171.992799] [drm] ring test on 3 succeeded in 1 usecs
[  171.993112] [drm:evergreen_irq_set], evergreen_irq_set: sw int gfx
[  171.993154] [drm] ib test on ring 0 succeeded in 0 usecs
[  171.993197] [drm:evergreen_irq_set], r600_irq_set: sw int dma
[  172.419617] [drm:evergreen_irq_set], r600_irq_set: sw int dma
....
[  182.399612] [drm:evergreen_irq_set], r600_irq_set: sw int dma
[  182.409618] [drm:evergreen_irq_set], r600_irq_set: sw int dma
[  182.419604] radeon 0001:01:00.0: GPU lockup CP stall for more than 10000msec
[  182.419615] radeon 0001:01:00.0: GPU lockup (waiting for 0x0000000000000001
last fence id 0x0000000000000000)
[  182.419626] [drm:r600_dma_ib_test] *ERROR* radeon: fence wait failed (-35).
[  182.419634] [drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on
ring 3 (-35).

Do you guys have any idea what could be wrong, or what should be looked into? 

Thanks

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

Lucas Kannebley Tavares <lucaskt@linux.vnet.ibm.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lucaskt@linux.vnet.ibm.com
            Version|XOrg 6.7.0                  |unspecified

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

--- Comment #1 from Lucas Kannebley Tavares <lucaskt@linux.vnet.ibm.com> ---
Created attachment 73398
  --> https://bugs.freedesktop.org/attachment.cgi?id=73398&action=edit
Backtrace upon reboot

I can't remove the module the modprobe (some resource got stuck) but there's a
backtrace printout if I attempt to reboot the machine.

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

--- Comment #2 from Alex Deucher <agd5f@yahoo.com> ---
Is this still an issue with Dave's latest drm pull request:
http://cgit.freedesktop.org/~airlied/linux/log/?h=drm-fixes

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
Created attachment 73440
  --> https://bugs.freedesktop.org/attachment.cgi?id=73440&action=edit
Enable more DMA byte swapping bits on big endian hosts

Does this patch help?

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

--- Comment #4 from Alex Deucher <agd5f@yahoo.com> ---
Created attachment 73455
  --> https://bugs.freedesktop.org/attachment.cgi?id=73455&action=edit
use sw swap for dma rings

If the hw swapper patch doesn't work, you can try this patch.

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

--- Comment #5 from Alex Deucher <agd5f@yahoo.com> ---
in attachment 73440, I don't think we want to enable fence swapping:

+#ifdef __BIG_ENDIAN
+    dma_cntl |= FENCE_SWAP_ENABLE;
+#endif

since we already swap the fence in radeon_fence_read().

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

--- Comment #6 from Alex Deucher <agd5f@yahoo.com> ---
Ignore my patch and comments.  After thinking about this more they won't work. 
See is Michel's patch fixes it for your.

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

--- Comment #7 from Michel Dänzer <michel@daenzer.net> ---
(In reply to comment #5)
> I don't think we want to enable fence swapping [...] since we already swap the
> fence in radeon_fence_read().

Ah, right. Lucas, so it's probably better if you try without FENCE_SWAP_ENABLE
first.

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

--- Comment #8 from Lucas Kannebley Tavares <lucaskt@linux.vnet.ibm.com> ---
Hi Michael, the patch you provided did indeed get rid of all errors, but now
modprobe enters an infinite loop on the test that previously failed

[   62.294510] [drm] ring test on 0 succeeded in 0 usecs
[   62.294578] [drm] ring test on 3 succeeded in 1 usecs
[   62.294901] [drm:evergreen_irq_set], evergreen_irq_set: sw int gfx
[   62.294943] [drm] ib test on ring 0 succeeded in 0 usecs
[   62.294989] [drm:evergreen_irq_set], r600_irq_set: sw int dma
[   62.721958] [drm:evergreen_irq_set], r600_irq_set: sw int dma
[   62.731965] [drm:evergreen_irq_set], r600_irq_set: sw int dma
[   62.741979] [drm:evergreen_irq_set], r600_irq_set: sw int dma
...
[  434.061917] [drm:evergreen_irq_set], r600_irq_set: sw int dma

Just saw your last comment and so I'm off to change remove FENCE_SWAP_ENABLE. 
Thanks

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

Lucas Kannebley Tavares <lucaskt@linux.vnet.ibm.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #9 from Lucas Kannebley Tavares <lucaskt@linux.vnet.ibm.com> ---
Ok, so the patch with FENCE_SWAP_ENABLE removed worked perfectly!

Thanks

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #10 from Michel Dänzer <michel@daenzer.net> ---
(In reply to comment #9)
> Ok, so the patch with FENCE_SWAP_ENABLE removed worked perfectly!

Great, thanks for testing! However, bugs should only be resolved once the fix
has landed in mainline.

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

Lucas Kannebley Tavares <lucaskt@linux.vnet.ibm.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=59982

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

Florian Mickler <florian@mickler.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |florian@mickler.org

--- Comment #11 from Florian Mickler <florian@mickler.org> ---
A patch referencing this bug report has been merged in Linux v3.8-rc6:

commit b3dfcb207e550dffb8680cab7afaf6b4fb6eae33
Author: Michel Dänzer <michel.daenzer@amd.com>
Date:   Thu Jan 24 19:02:01 2013 +0100

    drm/radeon: Enable DMA_IB_SWAP_ENABLE on big endian hosts.

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[Bug 59672] Problems initializing Radeon driver: lockup during IB test

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https://bugs.freedesktop.org/show_bug.cgi?id=59672

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |FIXED

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