Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 76 insertions, 0 deletions

diff --git a/src/spdk/lib/ftl/ftl_addr.h b/src/spdk/lib/ftl/ftl_addr.h
new file mode 100644
index 000000000..36d2ffb00
--- /dev/null
+++ b/src/spdk/lib/ftl/ftl_addr.h
@@ -0,0 +1,76 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef FTL_ADDR_H
+#define FTL_ADDR_H
+
+#include "spdk/stdinc.h"
+
+/* Marks address as invalid */
+#define FTL_ADDR_INVALID	(-1)
+/* Marks LBA as invalid */
+#define FTL_LBA_INVALID		((uint64_t)-1)
+/* Smallest data unit size */
+#define FTL_BLOCK_SIZE		4096
+
+/* This structure represents on-disk address. It can have one of the following */
+/* formats: */
+/*        - offset inside the disk */
+/*        - cache_offset inside the cache (indicated by the cached flag) */
+/*        - packed version of the two formats above (can be only used when the */
+/*          offset can be represented in less than 32 bits) */
+/* Packed format is used, when possible, to avoid wasting RAM on the L2P table. */
+struct ftl_addr {
+	union {
+		struct {
+			uint64_t cache_offset : 63;
+			uint64_t cached	      : 1;
+		};
+
+		struct {
+			union {
+				struct  {
+					uint32_t cache_offset : 31;
+					uint32_t cached	      : 1;
+				};
+
+				uint32_t offset;
+			};
+			uint32_t rsvd;
+		} pack;
+
+		uint64_t offset;
+	};
+};
+
+#endif /* FTL_ADDR_H */