[5.14-rc5] etnaviv-gpu 130000.gpu: recover hung GPU!

[Lucas Stach]

Hi Wadim,

Am Donnerstag, dem 19.08.2021 um 12:09 +0200 schrieb Wadim Egorov:
> Hi,
> 
> we have noticed "recover hung GPU" messages with the latest Linux on a i.MX6 
> Solo. The GPU recover message appears after some time running a Qt application 
> with QT_QPA_PLATFORM=eglfs and Mesa 21.0.3.
> So far there are no problems with the GUI. Nevertheless, we want to understand 
> the cause of the problem.
> 
> Below is the output from the viv-unpack tool of a coredump we've saved. 
> Unfortunately, I am not familiar with the whole DRM/GPU framework and don't 
> really know how to proceed and provide more relevant debug information.
> 
> Is this a known problem?
> 
Is this something that started showing up after the kernel update, or
are there other system component changes involved, like a Mesa update?
>From the hang location (inside a user cmdstream) a Mesa issue sounds
more likely than a kernel issue.

Regards,
Lucas

> Regards,
> Wadim
> 
> 
> === Register dump
> 0000000c = 00000051
> 00000000 = 00040100
> 00000004 = 7ffffff6 Idle: FE- DE+ PE+ SH- PA+ SE+ RA+ TX+ VG+ IM+ FP+ TS+
> 00000008 = 00002200
> 00000014 = ffffffff
> 00000018 = 0c010000
> 0000001c = e02864ad
> 00000020 = 00000880
> 00000024 = 00005106
> 00000028 = 20110511
> 0000002c = 01012500
> 00000034 = c9f99eff
> 00000038 = c9f99eff
> 00000070 = 00000000
> 00000100 = 00140021
> 00000104 = 00000010
> 00000108 = 000000e4
> 0000010c = 00000000
> 00000400 = 2a200000
> 00000404 = 2a200000
> 00000408 = 2a200000
> 0000040c = 2a200000
> 00000410 = 2a200000
> 00000414 = 3e000000
> 00000418 = 28000000
> 0000041c = 28000000
> 00000420 = 28000000
> 00000424 = 28000000
> 00000428 = 28000000
> 0000042c = 2a230000
> 00000480 = 00000088
> 0000065c = 00000001
> 00000660 = 00000804 Cmd: [adr1 DMA: idle Fetch: valid] Req idle Cal idle
> 00000664 = 02082650 Command DMA address
> 00000668 = 08010380 FE fetched word 0
> 0000066c = 00000003 FE fetched word 1
> 00000670 = 00000000
> === Buffers
>   Num Name  IOVA     Size
>     0 reg   00000000 00000128      296
>     1 mmu   00000000 00200000  2097152
>     2 ring  02080000 00001000     4096
> *  3 cmd   02082000 00000a08     2568
>     4 bomap 00000000 00006300    25344
>     5 bo    80a07000 00003000    12288
>     6 bo    80003000 00003000    12288
>     7 bo    80006000 00100000  1048576
>     8 bo    80a0a000 00001000     4096
>     9 bo    80107000 00280000  2621440
>    10 bo    80a0b000 00280000  2621440
>    11 bo    80106000 00001000     4096
>    12 bo    80607000 00400000  4194304
>    13 bo    02700000 00258000  2457600
> 
> Checking MMU entries... ok
>