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/common/linux/driver_common.c | |
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/common/linux/driver_common.c')
-rw-r--r-- | drivers/gpu/nvgpu/common/linux/driver_common.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/nvgpu/common/linux/driver_common.c b/drivers/gpu/nvgpu/common/linux/driver_common.c index bd9a4e77..a00880ed 100644 --- a/drivers/gpu/nvgpu/common/linux/driver_common.c +++ b/drivers/gpu/nvgpu/common/linux/driver_common.c | |||
@@ -39,6 +39,7 @@ static void nvgpu_init_vars(struct gk20a *g) | |||
39 | gk20a_init_gr(g); | 39 | gk20a_init_gr(g); |
40 | 40 | ||
41 | init_rwsem(&g->busy_lock); | 41 | init_rwsem(&g->busy_lock); |
42 | init_rwsem(&g->deterministic_busy); | ||
42 | 43 | ||
43 | nvgpu_spinlock_init(&g->mc_enable_lock); | 44 | nvgpu_spinlock_init(&g->mc_enable_lock); |
44 | 45 | ||