Simple packet header format as defined by DMTF DSP0236.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
---
v2:
- Controller -> component
---
MAINTAINERS | 1 +
include/net/mctp.h | 35 +++++++++++++++++++++++++++++++++++
2 files changed, 36 insertions(+)
create mode 100644 include/net/mctp.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 8116fd2a0789..8eb957c848dc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10874,6 +10874,7 @@ M: Jeremy Kerr <jk@codeconstruct.com.au>
M: Matt Johnston <matt@codeconstruct.com.au>
L: netdev@vger.kernel.org
S: Maintained
+F: include/net/mctp.h
F: net/mctp/
MAN-PAGES: MANUAL PAGES FOR LINUX -- Sections 2, 3, 4, 5, and 7
diff --git a/include/net/mctp.h b/include/net/mctp.h
new file mode 100644
index 000000000000..4c01e083be45
--- /dev/null
+++ b/include/net/mctp.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Management Component Transport Protocol (MCTP)
+ *
+ * Copyright (c) 2021 Code Construct
+ * Copyright (c) 2021 Google
+ */
+
+#ifndef __NET_MCTP_H
+#define __NET_MCTP_H
+
+#include <linux/bits.h>
+
+/* MCTP packet definitions */
+struct mctp_hdr {
+ u8 ver;
+ u8 dest;
+ u8 src;
+ u8 flags_seq_tag;
+};
+
+#define MCTP_VER_MIN 1
+#define MCTP_VER_MAX 1
+
+/* Definitions for flags_seq_tag field */
+#define MCTP_HDR_FLAG_SOM BIT(7)
+#define MCTP_HDR_FLAG_EOM BIT(6)
+#define MCTP_HDR_FLAG_TO BIT(3)
+#define MCTP_HDR_FLAGS GENMASK(5, 3)
+#define MCTP_HDR_SEQ_SHIFT 4
+#define MCTP_HDR_SEQ_MASK GENMASK(1, 0)
+#define MCTP_HDR_TAG_SHIFT 0
+#define MCTP_HDR_TAG_MASK GENMASK(2, 0)
+
+#endif /* __NET_MCTP_H */--
2.30.2