diff options
author | Konsta Holtta <kholtta@nvidia.com> | 2017-05-16 06:47:58 -0400 |
---|---|---|
committer | mobile promotions <svcmobile_promotions@nvidia.com> | 2017-06-14 19:33:32 -0400 |
commit | 7680fd689ecf7d11bf2dfdba41dc2f33cde2bbe7 (patch) | |
tree | b6df6640eaaa7e46deae7035572e7019f4311f7d /drivers/gpu/nvgpu/gk20a/gk20a.h | |
parent | 3c3c39dfe0d1122efeead871eec7c37617404850 (diff) |
gpu: nvgpu: hold power ref for deterministic channels
To support deterministic channels even with platforms where railgating
is supported, have each deterministic-marked channel hold a power
reference during their lifetime, and skip taking power refs for jobs in
submit path for those.
Previously, railgating blocked deterministic submits in general because
of gk20a_busy()/gk20a_idle() calls in submit path possibly taking time
and more significantly because the gpu may need turning on which takes a
nondeterministic and long amount of time.
As an exception, gk20a_do_idle() can still block deterministic submits
until gk20a_do_unidle() is called. Add a rwsem to guard this. VPR resize
needs do_idle, which conflicts with deterministic channels' requirement
to keep the GPU on. This is documented in the ioctl header now.
Make NVGPU_GPU_FLAGS_SUPPORT_DETERMINISTIC_SUBMIT_NO_JOBTRACKING always
set in the gpu characteristics now that it's supported. The only thing
left now blocking NVGPU_GPU_FLAGS_SUPPORT_DETERMINISTIC_SUBMIT_FULL is
the sync framework.
Make the channel debug dump show which channels are deterministic.
Bug 200291300
Jira NVGPU-70
Change-Id: I47b6f3a8517cd6e4255f6ca2855e3dd912e4f5f3
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1483038
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/gk20a/gk20a.h')
-rw-r--r-- | drivers/gpu/nvgpu/gk20a/gk20a.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h index 1d867912..79118fca 100644 --- a/drivers/gpu/nvgpu/gk20a/gk20a.h +++ b/drivers/gpu/nvgpu/gk20a/gk20a.h | |||
@@ -1025,6 +1025,12 @@ struct gk20a { | |||
1025 | u32 log_trace; | 1025 | u32 log_trace; |
1026 | 1026 | ||
1027 | struct rw_semaphore busy_lock; | 1027 | struct rw_semaphore busy_lock; |
1028 | /* | ||
1029 | * Guards access to hardware when usual gk20a_{busy,idle} are skipped | ||
1030 | * for submits and held for channel lifetime but dropped for an ongoing | ||
1031 | * gk20a_do_idle(). | ||
1032 | */ | ||
1033 | struct rw_semaphore deterministic_busy; | ||
1028 | 1034 | ||
1029 | struct nvgpu_falcon pmu_flcn; | 1035 | struct nvgpu_falcon pmu_flcn; |
1030 | struct nvgpu_falcon sec2_flcn; | 1036 | struct nvgpu_falcon sec2_flcn; |