Nouveau - Jan 2008 - [Bug 14284] New: frequent DMA queue hangs on NV34 on powerpc

http://bugs.freedesktop.org/show_bug.cgi?id=14284

           Summary: frequent DMA queue hangs on NV34 on powerpc
           Product: xorg
           Version: git
          Platform: PowerPC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: obiwan at mailmij.org
         QAContact: xorg-team at lists.x.org


When stressing the machine a bit (scrolling large amounts of icons, or running
gtkperf usually does the trick) but also after some time of normal use, I
inevitably get X to reset because of a hang in the DMA queue.

Drm messages:
Jan 27 01:23:23 legolas kernel: [  205.234985] [drm] PFIFO_DMA_PUSHER - Ch 1
put: 32, get:948 mthd 0x0a2c status 0x00001000
Jan 27 01:23:23 legolas kernel: [  205.235011] [drm] PGRAPH_ERROR - nSource:
ILLEGAL_MTHD, nStatus: PROTECTION_FAULT
Jan 27 01:23:23 legolas kernel: [  205.235021] [drm] PGRAPH_ERROR - Ch 1/6
Class 0x009f Mthd 0x0a00 Data 0x00030303:0x00011229
Jan 27 01:23:23 legolas kernel: [  205.235032] [drm] PGRAPH_ERROR - nSource:
ILLEGAL_MTHD, nStatus: PROTECTION_FAULT
Jan 27 01:23:23 legolas kernel: [  205.235040] [drm] PGRAPH_ERROR - Ch 1/6
Class 0x009f Mthd 0x0a04 Data 0x00030303
:0x00030303

This then continues until method 0a2c. The PGRAPH_ERROR are not always there.
The pusher interrupt is always happening. Sometimes, I also get 
[drm] PFIFO_CACHE_ERROR - Ch 1/0 Mthd 0x0000 Data 0x6f000000 status 0x00000001

Xorg log attached. 

Danny


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--- Comment #1 from Danny <obiwan at mailmij.org>  2008-01-28 22:46:30 PST
---
Created an attachment (id=13998)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=13998)
xorg log

fifo dump of crash. I have many similar ones. I could not find a connection
between them. But please ask if more are needed.


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--- Comment #2 from Danny <obiwan at mailmij.org>  2008-01-28 23:44:33 PST
---
Created an attachment (id=14002)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14002)
list of methods before the dma lockup

This is a list of methods called by the X driver before it locked up. In this
particular case I didn't have any output on whether BEGIN_RING==OUT_RING but
in
a previous crash log I outputted this info and it seemed to be ok (the only
cases in which we have 1 out_ring more is when we hit nouveau_dma_wait)

d.


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--- Comment #3 from Danny <obiwan at mailmij.org>  2008-01-29 03:21:55 PST
---
bug #14287 looks identical to this one.

d.


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--- Comment #4 from Danny <obiwan at mailmij.org>  2008-02-08 01:51:22 PST
---
Created an attachment (id=14214)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14214)
patch enabling pcigart and making sure cmdbuf goes there

DMA queue hangs only happen when the command buffer is in FB. Turning on
AGP on powerpc leads to lockups with DFS, even when using a PCI gart. 
Therefore, current drm has agp_init disabled. This patch enables PCI
gart in the DDX, and makes sure the cmd buffer goes there.


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Danny <obiwan at mailmij.org> changed:

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




--- Comment #5 from Danny <obiwan at mailmij.org>  2008-02-20 02:51:36 PST
---
patch was applied, fixed.


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