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authorDeepak Nibade <dnibade@nvidia.com>2017-04-11 02:40:30 -0400
committermobile promotions <svcmobile_promotions@nvidia.com>2017-04-11 12:57:16 -0400
commit6de456f8407ba7230410175f1aff90541137d19b (patch)
tree1ba58f9b7effe006516d471b35966ca0bf550c4d /drivers/gpu/nvgpu/therm/thrmpmu.h
parenta100422df5a7ab799d979a383d9bfb963d82e45a (diff)
gpu: nvgpu: wait for engine idle in shutdown
In gk20a_pm_shutdown(), we do not check return value of gk20a_pm_prepare_poweroff In some cases it is possible that gk20a_pm_prepare_poweroff() returns -EBUSY (this could happen if engines are busy) so we don't clean up s/w state and directly trigger GPU railgate In case some interrupt is triggered simultaneously we try to access a register while GPU is already railgated This leads to a hard hang in nvgpu shutdown path Make below changes in shutdown sequence to fix this: - check return value of gk20a_wait_for_idle() - disable activity on all engines with gk20a_fifo_disable_all_engine_activity() - ensure engines are idle with gk20a_fifo_wait_engine_idle() - check return value of gk20a_pm_prepare_poweroff() - check return value of gk20a_pm_railgate() Add a print when we bail out early in case GPU is already railgated Move to use new nvgpu_info/err() log messages instead of dev_*() messages Bug 200281010 Change-Id: I2856f9be6cd2de9b0d3ae12955cb1f0a2b6c29be Signed-off-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-on: http://git-master/r/1454658 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/therm/thrmpmu.h')
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