1 files changed, 100 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fence_gk20a.h b/drivers/gpu/nvgpu/gk20a/fence_gk20a.h
new file mode 100644
index 00000000..50f1a9bd
--- /dev/null
+++ b/drivers/gpu/nvgpu/gk20a/fence_gk20a.h
@@ -0,0 +1,100 @@
+/*
+ * drivers/video/tegra/host/gk20a/fence_gk20a.h
+ *
+ * GK20A Fences
+ *
+ * Copyright (c) 2014-2017, 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 _GK20A_FENCE_H_
+#define _GK20A_FENCE_H_
+
+#include <nvgpu/kref.h>
+
+struct platform_device;
+struct sync_timeline;
+struct sync_fence;
+struct nvgpu_semaphore;
+struct channel_gk20a;
+struct gk20a;
+
+struct gk20a_fence_ops;
+
+struct gk20a_fence {
+        struct gk20a *g;
+
+        /* Valid for all fence types: */
+        bool valid;
+        struct nvgpu_ref ref;
+        bool wfi;
+        struct sync_fence *sync_fence;
+        const struct gk20a_fence_ops *ops;
+
+        /* Valid for fences created from semaphores: */
+        struct nvgpu_semaphore *semaphore;
+        struct nvgpu_cond *semaphore_wq;
+
+        /* Valid for fences created from syncpoints: */
+        struct nvgpu_nvhost_dev *nvhost_dev;
+        u32 syncpt_id;
+        u32 syncpt_value;
+
+        /* Valid for fences part of a pre-allocated fence pool */
+        struct nvgpu_allocator *allocator;
+};
+
+/* Fences can be created from semaphores or syncpoint (id, value) pairs */
+int gk20a_fence_from_semaphore(
+                struct gk20a *g,
+                struct gk20a_fence *fence_out,
+                struct sync_timeline *timeline,
+                struct nvgpu_semaphore *semaphore,
+                struct nvgpu_cond *semaphore_wq,
+                bool wfi, bool need_sync_fence);
+
+int gk20a_fence_from_syncpt(
+                struct gk20a_fence *fence_out,
+                struct nvgpu_nvhost_dev *nvhost_dev,
+                u32 id, u32 value, bool wfi,
+                bool need_sync_fence);
+
+int gk20a_alloc_fence_pool(
+                struct channel_gk20a *c,
+                unsigned int count);
+
+void gk20a_free_fence_pool(
+                struct channel_gk20a *c);
+
+struct gk20a_fence *gk20a_alloc_fence(
+                struct channel_gk20a *c);
+
+void gk20a_init_fence(struct gk20a_fence *f,
+                const struct gk20a_fence_ops *ops,
+                struct sync_fence *sync_fence, bool wfi);
+
+/* Fence operations */
+void gk20a_fence_put(struct gk20a_fence *f);
+struct gk20a_fence *gk20a_fence_get(struct gk20a_fence *f);
+int gk20a_fence_wait(struct gk20a *g, struct gk20a_fence *f,
+                                                        unsigned long timeout);
+bool gk20a_fence_is_expired(struct gk20a_fence *f);
+int gk20a_fence_install_fd(struct gk20a_fence *f);
+
+#endif