mirror of
https://github.com/torvalds/linux.git
synced 2025-04-06 00:16:18 +00:00
0791c0327a
Add an implementation for DMTF DSP0283, which defines a MCTP-over-USB
transport. As per that spec, we're restricted to full speed mode,
requiring 512-byte transfers.
Each MCTP-over-USB interface is a peer-to-peer link to a single MCTP
endpoint, so no physical addressing is required (of course, that MCTP
endpoint may then bridge to further MCTP endpoints). Consequently,
interfaces will report with no lladdr data:
# mctp link
dev lo index 1 address 00:00:00:00:00:00 net 1 mtu 65536 up
dev mctpusb0 index 6 address none net 1 mtu 68 up
This is a simple initial implementation, with single rx & tx urbs, and
no multi-packet tx transfers - although we do accept multi-packet rx
from the device.
Includes suggested fixes from Santosh Puranik <spuranik@nvidia.com>.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Cc: Santosh Puranik <spuranik@nvidia.com>
Link: https://patch.msgid.link/20250221-dev-mctp-usb-v3-2-3353030fe9cc@codeconstruct.com.au
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
63 lines
2.0 KiB
Plaintext
63 lines
2.0 KiB
Plaintext
|
|
if MCTP
|
|
|
|
menu "MCTP Device Drivers"
|
|
|
|
config MCTP_SERIAL
|
|
tristate "MCTP serial transport"
|
|
depends on TTY
|
|
select CRC_CCITT
|
|
help
|
|
This driver provides an MCTP-over-serial interface, through a
|
|
serial line-discipline, as defined by DMTF specification "DSP0253 -
|
|
MCTP Serial Transport Binding". By attaching the ldisc to a serial
|
|
device, we get a new net device to transport MCTP packets.
|
|
|
|
This allows communication with external MCTP endpoints which use
|
|
serial as their transport. It can also be used as an easy way to
|
|
provide MCTP connectivity between virtual machines, by forwarding
|
|
data between simple virtual serial devices.
|
|
|
|
Say y here if you need to connect to MCTP endpoints over serial. To
|
|
compile as a module, use m; the module will be called mctp-serial.
|
|
|
|
config MCTP_SERIAL_TEST
|
|
bool "MCTP serial tests" if !KUNIT_ALL_TESTS
|
|
depends on MCTP_SERIAL=y && KUNIT=y
|
|
default KUNIT_ALL_TESTS
|
|
|
|
config MCTP_TRANSPORT_I2C
|
|
tristate "MCTP SMBus/I2C transport"
|
|
# i2c-mux is optional, but we must build as a module if i2c-mux is a module
|
|
depends on I2C_MUX || !I2C_MUX
|
|
depends on I2C
|
|
depends on I2C_SLAVE
|
|
select MCTP_FLOWS
|
|
help
|
|
Provides a driver to access MCTP devices over SMBus/I2C transport,
|
|
from DMTF specification DSP0237. A MCTP protocol network device is
|
|
created for each I2C bus that has been assigned a mctp-i2c device.
|
|
|
|
config MCTP_TRANSPORT_I3C
|
|
tristate "MCTP I3C transport"
|
|
depends on I3C
|
|
help
|
|
Provides a driver to access MCTP devices over I3C transport,
|
|
from DMTF specification DSP0233.
|
|
A MCTP protocol network device is created for each I3C bus
|
|
having a "mctp-controller" devicetree property.
|
|
|
|
config MCTP_TRANSPORT_USB
|
|
tristate "MCTP USB transport"
|
|
depends on USB
|
|
help
|
|
Provides a driver to access MCTP devices over USB transport,
|
|
defined by DMTF specification DSP0283.
|
|
|
|
MCTP-over-USB interfaces are peer-to-peer, so each interface
|
|
represents a physical connection to one remote MCTP endpoint.
|
|
|
|
endmenu
|
|
|
|
endif
|