Open source GPL/LGPL release

drivers/gpu/nvgpu/common/fence/fence_sema.c

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2014-2020, 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.
+ */
+
+#include <nvgpu/semaphore.h>
+#include <nvgpu/cond.h>
+#include <nvgpu/fence.h>
+#include <nvgpu/fence_sema.h>
+#include "fence_priv.h"
+
+static int nvgpu_fence_semaphore_wait(struct nvgpu_fence_type *f, u32 timeout)
+{
+	struct nvgpu_fence_type_priv *pf = &f->priv;
+
+	if (!nvgpu_semaphore_is_acquired(pf->semaphore)) {
+		return 0;
+	}
+
+	return NVGPU_COND_WAIT_INTERRUPTIBLE(
+		pf->semaphore_wq,
+		!nvgpu_semaphore_is_acquired(pf->semaphore),
+		timeout);
+}
+
+static bool nvgpu_fence_semaphore_is_expired(struct nvgpu_fence_type *f)
+{
+	struct nvgpu_fence_type_priv *pf = &f->priv;
+
+	return !nvgpu_semaphore_is_acquired(pf->semaphore);
+}
+
+static void nvgpu_fence_semaphore_release(struct nvgpu_fence_type *f)
+{
+	struct nvgpu_fence_type_priv *pf = &f->priv;
+
+	if (pf->semaphore != NULL) {
+		nvgpu_semaphore_put(pf->semaphore);
+	}
+}
+
+static const struct nvgpu_fence_ops nvgpu_fence_semaphore_ops = {
+	.wait = nvgpu_fence_semaphore_wait,
+	.is_expired = nvgpu_fence_semaphore_is_expired,
+	.release = nvgpu_fence_semaphore_release,
+};
+
+/* This function takes ownership of the semaphore as well as the os_fence */
+void nvgpu_fence_from_semaphore(
+		struct nvgpu_fence_type *f,
+		struct nvgpu_semaphore *semaphore,
+		struct nvgpu_cond *semaphore_wq,
+		struct nvgpu_os_fence os_fence)
+{
+	struct nvgpu_fence_type_priv *pf = &f->priv;
+
+	nvgpu_fence_init(f, &nvgpu_fence_semaphore_ops, os_fence);
+
+	pf->semaphore = semaphore;
+	pf->semaphore_wq = semaphore_wq;
+}