mctp-usb.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * mctp-usb.h - MCTP USB transport binding: common definitions,
 4 * based on DMTF0283 specification:
 5 * https://www.dmtf.org/sites/default/files/standards/documents/DSP0283_1.0.1.pdf
 6 *
 7 * These are protocol-level definitions, that may be shared between host
 8 * and gadget drivers.
 9 *
10 * Copyright (C) 2024-2025 Code Construct Pty Ltd
11 */
12
13#ifndef __LINUX_USB_MCTP_USB_H
14#define __LINUX_USB_MCTP_USB_H
15
16#include <linux/types.h>
17
18struct mctp_usb_hdr {
19	__be16	id;
20	u8	rsvd;
21	u8	len;
22} __packed;
23
24#define MCTP_USB_XFER_SIZE	512
25#define MCTP_USB_BTU		68
26#define MCTP_USB_MTU_MIN	MCTP_USB_BTU
27#define MCTP_USB_MTU_MAX	(U8_MAX - sizeof(struct mctp_usb_hdr))
28#define MCTP_USB_DMTF_ID	0x1ab4
29
30#endif /*  __LINUX_USB_MCTP_USB_H */