From: Felix Kuehling Date: Mon, 10 May 2021 22:50:11 +0000 (-0400) Subject: drm/amdgpu: Albebaran: MTYPE_NC for coarse-grain remote memory X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2b2339eeaff597778b042bf0010b87bac33715e2;p=linux.git drm/amdgpu: Albebaran: 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 --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 941a204d28f5a..93ee569f6a63e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -453,7 +453,8 @@ static uint64_t get_pte_flags(struct amdgpu_device *adev, struct kgd_mem *mem) if (adev->gmc.xgmi.connected_to_cpu) snoop = true; } 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; } diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 12c827854d1d2..3886c630286bf 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -1040,7 +1040,8 @@ svm_range_get_pte_flags(struct amdgpu_device *adev, struct svm_range *prange) if (adev->gmc.xgmi.connected_to_cpu) snoop = true; } 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; }