First Push

NVIDIA-Linux-x86_64-535.161.07-grid/kernel/nvidia-drm/nvidia-drm-conftest.h

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+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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 __NVIDIA_DRM_CONFTEST_H__
+#define __NVIDIA_DRM_CONFTEST_H__
+
+#include "conftest.h"
+
+/*
+ * NOTE: This file is expected to get included at the top before including any
+ * of linux/drm headers.
+ *
+ * The goal is to redefine refcount_dec_and_test and refcount_inc before
+ * including drm header files, so that the drm macro/inline calls to
+ * refcount_dec_and_test* and refcount_inc get redirected to
+ * alternate implementation in this file.
+ */
+
+#if NV_IS_EXPORT_SYMBOL_GPL_refcount_inc
+
+#include <linux/refcount.h>
+
+#define refcount_inc(__ptr)         \
+    do {                            \
+        atomic_inc(&(__ptr)->refs); \
+    } while(0)
+
+#endif
+
+#if NV_IS_EXPORT_SYMBOL_GPL_refcount_dec_and_test
+
+#include <linux/refcount.h>
+
+#define refcount_dec_and_test(__ptr) atomic_dec_and_test(&(__ptr)->refs)
+
+#endif
+
+#if defined(NV_DRM_DRIVER_HAS_GEM_PRIME_RES_OBJ) || \
+    defined(NV_DRM_GEM_OBJECT_HAS_RESV)
+#define NV_DRM_FENCE_AVAILABLE
+#else
+#undef NV_DRM_FENCE_AVAILABLE
+#endif
+
+#endif /* defined(__NVIDIA_DRM_CONFTEST_H__) */