Include nvgpu headers

These are needed to build on NVIDIA's Jetson boards for the time
being. Only a couple structs are required, so it should be fairly
easy to remove this dependency at some point in the future.

1 files changed, 68 insertions, 0 deletions

diff --git a/include/nvgpu/xve.h b/include/nvgpu/xve.h
new file mode 100644
index 0000000..2d0d698
--- /dev/null
+++ b/include/nvgpu/xve.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2017-2018, 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 NVGPU_XVE_H
+#define NVGPU_XVE_H
+
+#include <nvgpu/types.h>
+#include <nvgpu/log2.h>
+
+/*
+ * For the available speeds bitmap.
+ */
+#define GPU_XVE_SPEED_2P5       (1 << 0)
+#define GPU_XVE_SPEED_5P0       (1 << 1)
+#define GPU_XVE_SPEED_8P0       (1 << 2)
+#define GPU_XVE_NR_SPEEDS       3
+
+#define GPU_XVE_SPEED_MASK      (GPU_XVE_SPEED_2P5 |    \
+                                 GPU_XVE_SPEED_5P0 |    \
+                                 GPU_XVE_SPEED_8P0)
+
+/*
+ * The HW uses a 2 bit field where speed is defined by a number:
+ *
+ *   NV_XVE_LINK_CONTROL_STATUS_LINK_SPEED_2P5 = 1
+ *   NV_XVE_LINK_CONTROL_STATUS_LINK_SPEED_5P0 = 2
+ *   NV_XVE_LINK_CONTROL_STATUS_LINK_SPEED_8P0 = 3
+ *
+ * This isn't ideal for a bitmap with available speeds. So the external
+ * APIs think about speeds as a bit in a bitmap and this function converts
+ * from those bits to the actual HW speed setting.
+ *
+ * @speed_bit must have only 1 bit set and must be one of the 3 available
+ * HW speeds. Not all chips support all speeds so use available_speeds() to
+ * determine what a given chip supports.
+ */
+static inline const char *xve_speed_to_str(u32 speed)
+{
+        if (!speed || !is_power_of_2(speed) ||
+            !(speed & GPU_XVE_SPEED_MASK)) {
+                return "Unknown ???";
+        }
+
+        return speed & GPU_XVE_SPEED_2P5 ? "Gen1" :
+               speed & GPU_XVE_SPEED_5P0 ? "Gen2" :
+               speed & GPU_XVE_SPEED_8P0 ? "Gen3" :
+               "Unknown ???";
+}
+
+#endif /* NVGPU_XVE_H */