[mipsel+rs780e]Occasionally "GPU lockup" after resuming from suspend.

[Chen Jie]

Hi,

在 2011年10月17日 下午2:34， <chenhc at lemote.com>写道：

> If I start X but switch to the console, then do suspend & resume, "GPU
> reset" hardly happen. but there is a new problem that the IRQ of radeon
> card is disabled. Maybe "GPU reset" has something to do with "IRQ
> disabled"?
>
> I have tried "irqpoll", it doesn't fix this problem.
>
> [  571.914062] irq 6: nobody cared (try booting with the "irqpoll" option)
> [  571.914062] Call Trace:
> [  571.914062] [<ffffffff806f3248>] dump_stack+0x8/0x34
> [  571.914062] [<ffffffff8027e1e4>] __report_bad_irq.clone.6+0x44/0x15c
> [  571.914062] [<ffffffff8027e584>] note_interrupt+0x204/0x2a0
> [  571.914062] [<ffffffff8027c7cc>] handle_irq_event_percpu+0x19c/0x1f8
> [  571.914062] [<ffffffff8027c890>] handle_irq_event+0x68/0xa8
> [  571.914062] [<ffffffff8027f038>] handle_level_irq+0xd8/0x13c
> [  571.914062] [<ffffffff8027bec8>] generic_handle_irq+0x48/0x58
> [  571.914062] [<ffffffff80204574>] do_IRQ+0x18/0x24
> [  571.914062] [<ffffffff8020152c>] mach_irq_dispatch+0xf0/0x194
> [  571.914062] [<ffffffff80202a40>] ret_from_irq+0x0/0x4
> [  571.914062]
> [  571.914062] handlers:
> [  571.914062] [<ffffffff8053bba8>] radeon_driver_irq_handler_kms
>
> P.S.: use the latest kernel from git, and irq6 is not shared by other
> devices.
>
> Does fence_wait depends on GPU's interrupt? If yes, then can I say "GPU
lockup" is caused by unexpected disabling of GPU's irq?


> > Hi Alex, Michel
> >
> > 2011/10/5 Alex Deucher <alexdeucher at gmail.com>
> >
> >> 2011/10/5 Michel D鋘zer <michel at daenzer.net>:
> >> > On Don, 2011-09-29 at 17:17 +0800, Chen Jie wrote:
> >> >>
> >> >> We got occasionally "GPU lockup" after resuming from suspend(on
> >> mipsel
> >> >> platform with a mips64 compatible CPU and rs780e, the kernel is
> >> >> 3.1.0-rc8 64bit).  Related kernel message:
> >> >
> >> > [...]
> >> >
> >> >> [  177.085937] radeon 0000:01:05.0: GPU lockup CP stall for more than
> >> >> 10019msec
> >> >> [  177.089843] ------------[ cut here ]------------
> >> >> [  177.097656] WARNING: at drivers/gpu/drm/radeon/radeon_fence.c:267
> >> >> radeon_fence_wait+0x25c/0x33c()
> >> >> [  177.105468] GPU lockup (waiting for 0x000013C3 last fence id
> >> >> 0x000013AD)
> >> >> [  177.113281] Modules linked in: psmouse serio_raw
> >> >> [  177.117187] Call Trace:
> >> >> [  177.121093] [<ffffffff806f3e7c>] dump_stack+0x8/0x34
> >> >> [  177.125000] [<ffffffff8022e4f4>] warn_slowpath_common+0x78/0xa0
> >> >> [  177.132812] [<ffffffff8022e5b8>] warn_slowpath_fmt+0x38/0x44
> >> >> [  177.136718] [<ffffffff80522ed8>] radeon_fence_wait+0x25c/0x33c
> >> >> [  177.144531] [<ffffffff804e9e70>] ttm_bo_wait+0x108/0x220
> >> >> [  177.148437] [<ffffffff8053b478>] radeon_gem_wait_idle_ioctl
> >> >> +0x80/0x114
> >> >> [  177.156250] [<ffffffff804d2fe8>] drm_ioctl+0x2e4/0x3fc
> >> >> [  177.160156] [<ffffffff805a1820>] radeon_kms_compat_ioctl+0x28/0x38
> >> >> [  177.167968] [<ffffffff80311a04>] compat_sys_ioctl+0x120/0x35c
> >> >> [  177.171875] [<ffffffff80211d18>] handle_sys+0x118/0x138
> >> >> [  177.179687] ---[ end trace 92f63d998efe4c6d ]---
> >> >> [  177.187500] radeon 0000:01:05.0: GPU softreset
> >> >> [  177.191406] radeon 0000:01:05.0:   R_008010_GRBM_STATUS=0xF57C2030
> >> >> [  177.195312] radeon 0000:01:05.0:
> >> R_008014_GRBM_STATUS2=0x00111103
> >> >> [  177.203125] radeon 0000:01:05.0:   R_000E50_SRBM_STATUS=0x20023040
> >> >> [  177.363281] radeon 0000:01:05.0: Wait for MC idle timedout !
> >> >
> >> > [...]
> >> >
> >> >> What may cause a "GPU lockup"?
> >> >
> >> > Lots of things... The most common cause is an incorrect command stream
> >> > sent to the GPU by userspace or the kernel.
> >> >
> >> >> Why reset didn't work?
> >> >
> >> > Might be related to 'Wait for MC idle timedout !', but I don't know
> >> > offhand what could be up with that.
> >> >
> >> >
> >> >> BTW,  one question:
> >> >> I got 'RADEON_IS_PCI | RADEON_IS_IGP' in rdev->flags, which causes
> >> >> need_dma32 was set.
> >> >> Is it correct? (drivers/char/agp is not available on mips, could that
> >> >> be the reason?)
> >> >
> >> > Not sure, Alex?
> >>
> >> You don't AGP for newer IGP cards (rs4xx+).  It gets set by default if
> >> the card is not AGP or PCIE.  That should be changed as only the
> >> legacy r1xx PCI GART block has that limitation.  I'll send a patch out
> >> shortly.
> >>
> >> Got it, thanks for the reply.
> >
>
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