Hardware HWPM system should be reset when first reservation is made
either for HWPM or PMA_STREAM resource. Support this with below changes
- Add hwpm_refcount counter to track HWPM and PMA_STREAM resource
reservation count
- Increment counter on every HWPM/PMA resource reservation
- Decrement counter on every resource reservation release
- Reset HWPM system in MC and disable perf unit SLCG on first refcount
increment
- Reset HWPM system in MC and re-enable perf unit SLCG after last
refcount decrement
- Add nvgpu_cg_slcg_perf_load_enable() to manage perf unit SLCG
Bug 2510974
Jira NVGPU-5360
Change-Id: I20d2927947c3e4d8073cd3131b7733791e9c9346
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2399594
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
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