[PATCH RFC net-next 03/16] mctp: Add base packet definitions
From: Jeremy Kerr <jk@codeconstruct.com.au>
Date: 2021-06-03 06:59:42
Subsystem:
management component transport protocol (mctp), networking [general], the rest · Maintainers:
Jeremy Kerr, Matt Johnston, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Simple packet header format as defined by DMTF DSP0236. Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> --- 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 5041ea78ab97..262451188c46 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..757304d98c0a
--- /dev/null
+++ b/include/net/mctp.h@@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Management Controller 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