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gpu: nvgpu: add ioctl to configure l2 max_ways_evict_last

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Add ioctl support to configure and read the max number of lines/ways
in a L2 cache set that can be marked as EVICT_LAST. This is accomplished
through two new ltc hals: set_l2_max_ways_evict_last,
get_l2_max_ways_evict_last. These hals will only be set for nvgpu-next
chips. Incase of legacy chips, the IOCTLs will return error -ENOSYS.

Generate following litter constants to get the number of sets in a l2
slice and the number of ways in each set:
- GPU_LIT_NUM_LTC_LTS_SETS
- GPU_LIT_NUM_LTC_LTS_WAYS

Add gpu characteritics flag: NVGPU_L2_MAX_WAYS_EVICT_LAST_ENABLED to
allow userspace driver to determine if L2_MAX_WAYS_EVICT_LAST ioctl is
supported.

Bug 200605474

Change-Id: Id3180f891399f5e128500f3835d762aee59953e0
Signed-off-by: Antony Clince Alex <aalex@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2445884
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Antony Clince Alex
2020-11-13 14:50:51 +05:30
committed by mobile promotions
parent fe03443161
commit f41e5975d8
11 changed files with 104 additions and 7 deletions
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4
drivers/gpu/nvgpu/include/nvgpu/enabled.h
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2017-2020, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2017-2021, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -204,6 +204,8 @@ struct gk20a;
DEFINE_FLAG(NVGPU_PMU_NEXT_CORE_ENABLED, "PMU NEXT CORE enabled"), \
DEFINE_FLAG(NVGPU_ACR_NEXT_CORE_ENABLED, \
"NEXT CORE availability for acr"), \
DEFINE_FLAG(NVGPU_L2_MAX_WAYS_EVICT_LAST_ENABLED, \
"Set L2 Max Ways Evict Last support"), \
DEFINE_FLAG(NVGPU_MAX_ENABLED_BITS, "Marks max number of flags"),
/**