From 0c6f7777cf37b84839d556a41b9dbeedccfa64d4 Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Mon, 10 May 2021 18:37:56 -0400 Subject: [PATCH] drm/amdgpu: Arcturus: MTYPE_NC for coarse-grain remote memory MTYPE UC was used for a specific use case that ended up not being implemented. Use NC for better performance for coarse-grained memory where cache coherence during shader execution is not required. Signed-off-by: Felix Kuehling Reviewed-by: Oak Zeng Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 3 ++- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index dfa025d..941a204 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -433,7 +433,8 @@ static uint64_t get_pte_flags(struct amdgpu_device *adev, struct kgd_mem *mem) mapping_flags |= coherent ? AMDGPU_VM_MTYPE_CC : AMDGPU_VM_MTYPE_RW; else - mapping_flags |= AMDGPU_VM_MTYPE_UC; + mapping_flags |= coherent ? + AMDGPU_VM_MTYPE_UC : AMDGPU_VM_MTYPE_NC; } else { mapping_flags |= coherent ? AMDGPU_VM_MTYPE_UC : AMDGPU_VM_MTYPE_NC; diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index b665e9f..12c8278 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -1022,7 +1022,8 @@ svm_range_get_pte_flags(struct amdgpu_device *adev, struct svm_range *prange) mapping_flags |= coherent ? AMDGPU_VM_MTYPE_CC : AMDGPU_VM_MTYPE_RW; } else { - mapping_flags |= AMDGPU_VM_MTYPE_UC; + mapping_flags |= coherent ? + AMDGPU_VM_MTYPE_UC : AMDGPU_VM_MTYPE_NC; if (amdgpu_xgmi_same_hive(adev, bo_adev)) snoop = true; } -- 2.7.4