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| author | Jakub Kicinski <kuba@kernel.org> | 2025-02-22 03:45:26 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-02-22 03:45:26 +0300 |
| commit | b66e19dcf684b21b6d3a1844807bd1df97ad197a (patch) | |
| tree | cb4145a2ca1281102180d2a974f7502ec05cd053 /include/linux | |
| parent | e6a532185daae9302bf2f358c8675733093b906e (diff) | |
| parent | 0791c0327a6e4e7691d6fc5ad334c215de04dcc9 (diff) | |
| download | linux-b66e19dcf684b21b6d3a1844807bd1df97ad197a.tar.xz | |
Merge branch 'mctp-add-mctp-over-usb-hardware-transport-binding'
Jeremy Kerr says:
====================
mctp: Add MCTP-over-USB hardware transport binding
Add an implementation of the DMTF standard DSP0283, providing an MCTP
channel over high-speed USB.
This is a fairly trivial first implementation, in that we only submit
one tx and one rx URB at a time. We do accept multi-packet transfers,
but do not yet generate them on transmit.
Of course, questions and comments are most welcome, particularly on the
USB interfaces.
v2: https://lore.kernel.org/20250212-dev-mctp-usb-v2-0-76e67025d764@codeconstruct.com.au
v1: https://lore.kernel.org/20250206-dev-mctp-usb-v1-0-81453fe26a61@codeconstruct.com.au
====================
Link: https://patch.msgid.link/20250221-dev-mctp-usb-v3-0-3353030fe9cc@codeconstruct.com.au
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/usb/mctp-usb.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/linux/usb/mctp-usb.h b/include/linux/usb/mctp-usb.h new file mode 100644 index 000000000000..a2f6f1e04efb --- /dev/null +++ b/include/linux/usb/mctp-usb.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * mctp-usb.h - MCTP USB transport binding: common definitions, + * based on DMTF0283 specification: + * https://www.dmtf.org/sites/default/files/standards/documents/DSP0283_1.0.1.pdf + * + * These are protocol-level definitions, that may be shared between host + * and gadget drivers. + * + * Copyright (C) 2024-2025 Code Construct Pty Ltd + */ + +#ifndef __LINUX_USB_MCTP_USB_H +#define __LINUX_USB_MCTP_USB_H + +#include <linux/types.h> + +struct mctp_usb_hdr { + __be16 id; + u8 rsvd; + u8 len; +} __packed; + +#define MCTP_USB_XFER_SIZE 512 +#define MCTP_USB_BTU 68 +#define MCTP_USB_MTU_MIN MCTP_USB_BTU +#define MCTP_USB_MTU_MAX (U8_MAX - sizeof(struct mctp_usb_hdr)) +#define MCTP_USB_DMTF_ID 0x1ab4 + +#endif /* __LINUX_USB_MCTP_USB_H */ |