1 files changed, 62 insertions, 0 deletions
diff --git a/contrib/ofed/libmlx4/src/doorbell.h b/contrib/ofed/libmlx4/src/doorbell.h
new file mode 100644
index 0000000..f0b30a9
--- /dev/null
+++ b/contrib/ofed/libmlx4/src/doorbell.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2007 Cisco, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * 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 DOORBELL_H
+#define DOORBELL_H
+
+#ifdef __LP64__
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#  define MLX4_PAIR_TO_64(val) ((uint64_t) val[1] << 32 | val[0])
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#  define MLX4_PAIR_TO_64(val) ((uint64_t) val[0] << 32 | val[1])
+#else
+#  error __BYTE_ORDER not defined
+#endif
+
+static inline void mlx4_write64(uint32_t val[2], struct mlx4_context *ctx, int offset)
+{
+	*(volatile uint64_t *) (ctx->uar + offset) = MLX4_PAIR_TO_64(val);
+}
+
+#else
+
+static inline void mlx4_write64(uint32_t val[2], struct mlx4_context *ctx, int offset)
+{
+	pthread_spin_lock(&ctx->uar_lock);
+	*(volatile uint32_t *) (ctx->uar + offset)     = val[0];
+	*(volatile uint32_t *) (ctx->uar + offset + 4) = val[1];
+	pthread_spin_unlock(&ctx->uar_lock);
+}
+
+#endif
+
+#endif /* DOORBELL_H */