From 68c62306b378451ddb1a14c08022d18df3848b4d Mon Sep 17 00:00:00 2001 From: =?utf8?q?Christian=20K=C3=B6nig?= Date: Tue, 11 Jul 2017 17:23:29 +0200 Subject: [PATCH] drm/amdgpu: flush the HDP only once for CPU based VM updates MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit No need to do this after every single update. Signed-off-by: Christian König Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 5638c16..24879cf3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -992,10 +992,6 @@ static void amdgpu_vm_cpu_set_ptes(struct amdgpu_pte_update_params *params, i, value, flags); addr += incr; } - - /* Flush HDP */ - mb(); - amdgpu_gart_flush_gpu_tlb(params->adev, 0); } static int amdgpu_vm_wait_pd(struct amdgpu_device *adev, struct amdgpu_vm *vm, @@ -1238,6 +1234,12 @@ int amdgpu_vm_update_directories(struct amdgpu_device *adev, if (r) amdgpu_vm_invalidate_level(&vm->root); + if (vm->use_cpu_for_update) { + /* Flush HDP */ + mb(); + amdgpu_gart_flush_gpu_tlb(adev, 0); + } + return r; } @@ -1745,6 +1747,12 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev, list_add(&bo_va->vm_status, &vm->cleared); spin_unlock(&vm->status_lock); + if (vm->use_cpu_for_update) { + /* Flush HDP */ + mb(); + amdgpu_gart_flush_gpu_tlb(adev, 0); + } + return 0; } -- 2.7.4