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NVIDIA-Linux-x86_64-535.161.07-grid/kernel/nvidia-uvm/uvm_perf_heuristics.h

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+/*******************************************************************************
+    Copyright (c) 2016-2019 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.
+
+*******************************************************************************/
+
+#ifndef __UVM_PERF_HEURISTICS_H__
+#define __UVM_PERF_HEURISTICS_H__
+
+#include "nvtypes.h"
+#include "uvm_forward_decl.h"
+
+// Global initialization/cleanup functions
+NV_STATUS uvm_perf_heuristics_init(void);
+void uvm_perf_heuristics_exit(void);
+
+// Per-GPU initialization/cleanup functions. They are called from add_gpu,
+// remove_gpu.
+//
+// Locking: the global lock must be held when calling this function
+NV_STATUS uvm_perf_heuristics_add_gpu(uvm_gpu_t *gpu);
+void uvm_perf_heuristics_remove_gpu(uvm_gpu_t *gpu);
+
+// Per-VA space initialization/cleanup functions
+
+// This function is called during VA space creation
+NV_STATUS uvm_perf_heuristics_load(uvm_va_space_t *va_space);
+
+// This function is called when a GPU is registered on a VA space
+NV_STATUS uvm_perf_heuristics_register_gpu(uvm_va_space_t *va_space, uvm_gpu_t *gpu);
+
+// The following two functions are called during VA space teardown.
+// uvm_perf_heuristics_stop is called first with no lock taken on the VA space.
+// This is required because the performance heuristics modues may have scheduled
+// delayed work that needs to take the VA space lock. Therefore,
+// uvm_perf_heuristics_stop needs to cancel/flush any pending work.
+void uvm_perf_heuristics_stop(uvm_va_space_t *va_space);
+void uvm_perf_heuristics_unload(uvm_va_space_t *va_space);
+
+#endif