520.61.05

kernel-open/nvidia-uvm/uvm_hopper_fault_buffer.c

@@ -0,0 +1,42 @@
+/*******************************************************************************
+    Copyright (c) 2020 NVIDIA Corporation
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to
+    deal in the Software without restriction, including without limitation the
+    rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+    sell copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+        The above copyright notice and this permission notice shall be
+        included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+
+*******************************************************************************/
+
+#include "uvm_hal_types.h"
+#include "hwref/hopper/gh100/dev_fault.h"
+
+// TODO: Bug  1835884: [uvm] Query the maximum number of subcontexts from RM
+// ... to validate the ve_id
+#define MAX_SUBCONTEXTS 64
+NvU8 uvm_hal_hopper_fault_buffer_get_ve_id(NvU16 mmu_engine_id, uvm_mmu_engine_type_t mmu_engine_type)
+{
+    // Only graphics engines can generate MMU faults from different subcontexts
+    if (mmu_engine_type == UVM_MMU_ENGINE_TYPE_GRAPHICS) {
+        NvU16 ve_id = mmu_engine_id - NV_PFAULT_MMU_ENG_ID_GRAPHICS;
+        UVM_ASSERT(ve_id < MAX_SUBCONTEXTS);
+
+        return (NvU8)ve_id;
+    }
+    else {
+        return 0;
+    }
+}