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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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2
drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c
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@@ -291,6 +291,8 @@ static struct nvgpu_flags_mapping flags_mapping[] = {
NVGPU_SUPPORT_SMPC_GLOBAL_MODE},
{NVGPU_GPU_FLAGS_SUPPORT_GET_GR_CONTEXT,
NVGPU_SUPPORT_GET_GR_CONTEXT},
{NVGPU_GPU_FLAGS_L2_MAX_WAYS_EVICT_LAST_ENABLED,
NVGPU_L2_MAX_WAYS_EVICT_LAST_ENABLED},
};
static u64 nvgpu_ctrl_ioctl_gpu_characteristics_flags(struct gk20a *g)