From 2e8ef6a56129526a67b1058124be0839ab8f976a Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 6 Oct 2020 10:54:38 -0400
Subject: drm/amdgpu: add cached GPU fault structure to vm struct
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When we get a GPU page fault, cache the fault for later
analysis.
Cc: samuel.pitoiset@gmail.com
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Guchun Chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
(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 8ce91f69bbeb..91e36b0ad062 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2730,3 +2730,34 @@ void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m)
total_done_objs);
}
#endif
+
+/**
+ * amdgpu_vm_update_fault_cache - update cached fault into.
+ * @adev: amdgpu device pointer
+ * @pasid: PASID of the VM
+ * @addr: Address of the fault
+ * @status: GPUVM fault status register
+ * @vmhub: which vmhub got the fault
+ *
+ * Cache the fault info for later use by userspace in debugging.
+ */
+void amdgpu_vm_update_fault_cache(struct amdgpu_device *adev,
+ unsigned int pasid,
+ uint64_t addr,
+ uint32_t status,
+ unsigned int vmhub)
+{
+ struct amdgpu_vm *vm;
+ unsigned long flags;
+
+ xa_lock_irqsave(&adev->vm_manager.pasids, flags);
+
+ vm = xa_load(&adev->vm_manager.pasids, pasid);
+ if (vm) {
+ vm->fault_info.addr = addr;
+ vm->fault_info.status = status;
+ vm->fault_info.vmhub = vmhub;
+ }
+ xa_unlock_irqrestore(&adev->vm_manager.pasids, flags);
+}
+
--
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