Bug 36914

Summary:	r600g: add rv670 flushing workaround. Causes games and some mesa demos to segfault.
Product:	Mesa	Reporter:	Andy Furniss <adf.lists>
Component:	Drivers/Gallium/r600	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium
Version:	git
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Andy Furniss 2011-05-06 10:02:43 UTC

RV670 AGP card with agpmode=-1, d-r-t kernel as it was 16/03/11

Since

5066f7cd0e010db46b42f8f08a33c10cb34f8726
r600g: add rv670 flushing workaround.

I am getting segfaults with openarena, nexuiz, etqw and a few mesa demos - 

gltestperf,clearspd and ipers.

The bt of the segfault seems to repeat for ever.

Starting program: /home/andy/Src/Mesa-git/demos/src/demos/ipers 
[Thread debugging using libthread_db enabled]
IperS V1.0
Written by David Bucciarelli (tech.hmw@plus.it)
[New Thread 0xb726f700 (LWP 14143)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb726f700 (LWP 14143)]
r600_context_flush (ctx=0x8074e10) at r600_hw_context.c:1282
1282    {
(gdb) bt
#0  r600_context_flush (ctx=0x8074e10) at r600_hw_context.c:1282
#1  0xb6eeed3b in r600_context_flush_all (ctx=0x8074e10, flush_flags=128) at r600_hw_context.c:786
#2  0xb6eeef18 in r600_context_bo_flush (ctx=0x8074e10, flush_flags=33554496, flush_mask=0, rbo=0x83c1488) at r600_hw_context.c:814
#3  0xb6eef030 in r600_context_flush_dest_caches (ctx=0x8074e10) at r600_hw_context.c:1197
#4  0xb6eee833 in r600_context_flush (ctx=0x8074e10) at r600_hw_context.c:1298
#5  0xb6eeed3b in r600_context_flush_all (ctx=0x8074e10, flush_flags=128) at r600_hw_context.c:786
#6  0xb6eeef18 in r600_context_bo_flush (ctx=0x8074e10, flush_flags=33554496, flush_mask=0, rbo=0x83c1488) at r600_hw_context.c:814
#7  0xb6eef030 in r600_context_flush_dest_caches (ctx=0x8074e10) at r600_hw_context.c:1197
#8  0xb6eee833 in r600_context_flush (ctx=0x8074e10) at r600_hw_context.c:1298
#9  0xb6eeed3b in r600_context_flush_all (ctx=0x8074e10, flush_flags=128) at r600_hw_context.c:786
#10 0xb6eeef18 in r600_context_bo_flush (ctx=0x8074e10, flush_flags=33554496, flush_mask=0, rbo=0x83c1488) at r600_hw_context.c:814
#11 0xb6eef030 in r600_context_flush_dest_caches (ctx=0x8074e10) at r600_hw_context.c:1197
#12 0xb6eee833 in r600_context_flush (ctx=0x8074e10) at r600_hw_context.c:1298

Comment 1 Alex Deucher 2011-05-06 10:21:16 UTC

Should be fixed in:
3b20a89941fe9c7b5ad10e13cb035d0508c43bbd

Comment 2 Andy Furniss 2011-05-06 12:53:14 UTC

(In reply to comment #1)
> Should be fixed in:
> 3b20a89941fe9c7b5ad10e13cb035d0508c43bbd

Yea, OK now.

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