From d84a430d9f7b1ce6baedf1305106d0ae706aca76 Mon Sep 17 00:00:00 2001 From: Jonathan Kim Date: Tue, 17 Mar 2020 15:43:41 -0400 Subject: drm/amdgpu: fix race between pstate and remote buffer map Vega20 arbitrates pstate at hive level and not device level. Last peer to remote buffer unmap could drop P-State while another process is still remote buffer mapped. With this fix, P-States still needs to be disabled for now as SMU bug was discovered on synchronous P2P transfers. This should be fixed in the next FW update. Signed-off-by: Jonathan Kim Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 6d9252a27916..c6c3fc276fa4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -2124,11 +2124,8 @@ struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev, if (bo && amdgpu_xgmi_same_hive(adev, amdgpu_ttm_adev(bo->tbo.bdev)) && (bo->preferred_domains & AMDGPU_GEM_DOMAIN_VRAM)) { bo_va->is_xgmi = true; - mutex_lock(&adev->vm_manager.lock_pstate); /* Power up XGMI if it can be potentially used */ - if (++adev->vm_manager.xgmi_map_counter == 1) - amdgpu_xgmi_set_pstate(adev, 1); - mutex_unlock(&adev->vm_manager.lock_pstate); + amdgpu_xgmi_set_pstate(adev, AMDGPU_XGMI_PSTATE_MAX_VEGA20); } return bo_va; @@ -2551,12 +2548,8 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev, dma_fence_put(bo_va->last_pt_update); - if (bo && bo_va->is_xgmi) { - mutex_lock(&adev->vm_manager.lock_pstate); - if (--adev->vm_manager.xgmi_map_counter == 0) - amdgpu_xgmi_set_pstate(adev, 0); - mutex_unlock(&adev->vm_manager.lock_pstate); - } + if (bo && bo_va->is_xgmi) + amdgpu_xgmi_set_pstate(adev, AMDGPU_XGMI_PSTATE_MIN); kfree(bo_va); } @@ -3166,9 +3159,6 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev) idr_init(&adev->vm_manager.pasid_idr); spin_lock_init(&adev->vm_manager.pasid_lock); - - adev->vm_manager.xgmi_map_counter = 0; - mutex_init(&adev->vm_manager.lock_pstate); } /** -- cgit From 408d9121004d431fd2fd991fe461bf4891de6952 Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Sun, 19 Apr 2020 18:50:15 -0700 Subject: drm: amdgpu: fix kernel-doc struct warning MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fix a kernel-doc warning of missing struct field desription: ../drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c:92: warning: Function parameter or member 'vm' not described in 'amdgpu_vm_eviction_lock' Fixes: a269e44989f3 ("drm/amdgpu: Avoid reclaim fs while eviction lock") Signed-off-by: Randy Dunlap Cc: Signed-off-by: Alex Sierra Cc: Felix Kuehling Cc: Christian König Cc: Alex Deucher Cc: David (ChunMing) Zhou Cc: amd-gfx@lists.freedesktop.org Reviewed-by: Harry Wentland Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index c6c3fc276fa4..bcdaf5204d05 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -82,7 +82,7 @@ struct amdgpu_prt_cb { struct dma_fence_cb cb; }; -/** +/* * vm eviction_lock can be taken in MMU notifiers. Make sure no reclaim-FS * happens while holding this lock anywhere to prevent deadlocks when * an MMU notifier runs in reclaim-FS context. -- cgit