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+/*
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+ * Copyright 2017 Advanced Micro Devices, Inc.
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+ *
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+ * Permission is hereby granted, free of charge, to any person obtaining a
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+ * copy of this software and associated documentation files (the "Software"),
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+ * to deal in the Software without restriction, including without limitation
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+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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+ * and/or sell copies of the Software, and to permit persons to whom the
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+ * Software is furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be included in
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+ * all copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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+ * OTHER DEALINGS IN THE SOFTWARE.
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+ *
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+ * Authors: Christian König
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+ */
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+#ifndef __AMDGPU_MN_H__
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+#define __AMDGPU_MN_H__
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+
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+/*
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+ * MMU Notifier
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+ */
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+struct amdgpu_mn;
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+
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+#if defined(CONFIG_MMU_NOTIFIER)
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+void amdgpu_mn_lock(struct amdgpu_mn *mn);
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+void amdgpu_mn_unlock(struct amdgpu_mn *mn);
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+struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev);
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+int amdgpu_mn_register(struct amdgpu_bo *bo, unsigned long addr);
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+void amdgpu_mn_unregister(struct amdgpu_bo *bo);
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+#else
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+static inline void amdgpu_mn_lock(struct amdgpu_mn *mn) {}
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+static inline void amdgpu_mn_unlock(struct amdgpu_mn *mn) {}
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+static inline struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev)
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+{
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+ return NULL;
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+}
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+static inline int amdgpu_mn_register(struct amdgpu_bo *bo, unsigned long addr)
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+{
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+ return -ENODEV;
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+}
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+static inline void amdgpu_mn_unregister(struct amdgpu_bo *bo) {}
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+#endif
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+
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+#endif
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