diff options
| author | Debarshi Dutta <ddutta@nvidia.com> | 2022-01-30 21:43:19 -0500 |
|---|---|---|
| committer | mobile promotions <svcmobile_promotions@nvidia.com> | 2022-02-02 15:10:51 -0500 |
| commit | 46b43d2b2485233397f4f62b9bac6d35434b7aea (patch) | |
| tree | 3a0c2b31daf2f8d65123f0aaee4d0af182cbbf3c /drivers/gpu/nvgpu/os/linux/vm.c | |
| parent | de418f6ef634220194514a72db332d9fba350856 (diff) | |
gpu: nvgpu: add support for disabling l3 via DT
On volta the GPU determines whether to do L3 allocation for a mapping by
checking bit 36 of the physical address. So if a mapping should allocate lines
in the L3 this bit must be set.
However, when the physical addresses for 64GB of RAM uses the 36th bit
resulting in a conflict. Thus, add support for disabling l3 support
for SKUs having 64GB of physical memory.
Bug 3486025
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Change-Id: Ic540e754274cf1d9e6625493962699d21509e540
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2661548
Reviewed-by: Brad Griffis <bgriffis@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Tested-by: Brad Griffis <bgriffis@nvidia.com>
GVS: Gerrit_Virtual_Submit
Diffstat (limited to 'drivers/gpu/nvgpu/os/linux/vm.c')
| -rw-r--r-- | drivers/gpu/nvgpu/os/linux/vm.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/gpu/nvgpu/os/linux/vm.c b/drivers/gpu/nvgpu/os/linux/vm.c index dc807ab6..8956cce5 100644 --- a/drivers/gpu/nvgpu/os/linux/vm.c +++ b/drivers/gpu/nvgpu/os/linux/vm.c | |||
| @@ -1,5 +1,5 @@ | |||
| 1 | /* | 1 | /* |
| 2 | * Copyright (c) 2017-2020, NVIDIA CORPORATION. All rights reserved. | 2 | * Copyright (c) 2017-2022, NVIDIA CORPORATION. All rights reserved. |
| 3 | * | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it | 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, | 5 | * under the terms and conditions of the GNU General Public License, |
| @@ -50,8 +50,10 @@ static u32 nvgpu_vm_translate_linux_flags(struct gk20a *g, u32 flags) | |||
| 50 | core_flags |= NVGPU_VM_MAP_IO_COHERENT; | 50 | core_flags |= NVGPU_VM_MAP_IO_COHERENT; |
| 51 | if (flags & NVGPU_AS_MAP_BUFFER_FLAGS_UNMAPPED_PTE) | 51 | if (flags & NVGPU_AS_MAP_BUFFER_FLAGS_UNMAPPED_PTE) |
| 52 | core_flags |= NVGPU_VM_MAP_UNMAPPED_PTE; | 52 | core_flags |= NVGPU_VM_MAP_UNMAPPED_PTE; |
| 53 | if (flags & NVGPU_AS_MAP_BUFFER_FLAGS_L3_ALLOC) | 53 | if (!nvgpu_is_enabled(g, NVGPU_DISABLE_L3_SUPPORT)) { |
| 54 | core_flags |= NVGPU_VM_MAP_L3_ALLOC; | 54 | if (flags & NVGPU_AS_MAP_BUFFER_FLAGS_L3_ALLOC) |
| 55 | core_flags |= NVGPU_VM_MAP_L3_ALLOC; | ||
| 56 | } | ||
| 55 | if (flags & NVGPU_AS_MAP_BUFFER_FLAGS_DIRECT_KIND_CTRL) | 57 | if (flags & NVGPU_AS_MAP_BUFFER_FLAGS_DIRECT_KIND_CTRL) |
| 56 | core_flags |= NVGPU_VM_MAP_DIRECT_KIND_CTRL; | 58 | core_flags |= NVGPU_VM_MAP_DIRECT_KIND_CTRL; |
| 57 | if (flags & NVGPU_AS_MAP_BUFFER_FLAGS_PLATFORM_ATOMIC) | 59 | if (flags & NVGPU_AS_MAP_BUFFER_FLAGS_PLATFORM_ATOMIC) |