This adds a generic MCTP endpoint model that other devices may derive from.
Also included is a very basic implementation of an NVMe-MI device, supporting only a small subset of the required commands. Since this all relies on i2c target mode, this can currently only be used with an SoC that includes the Aspeed I2C controller. The easiest way to get up and running with this, is to grab my buildroot overlay[1] (aspeed_ast2600evb_nmi_defconfig). It includes modified a modified dts as well as a couple of required packages. QEMU can then be launched along these lines: qemu-system-arm \ -nographic \ -M ast2600-evb \ -kernel output/images/zImage \ -initrd output/images/rootfs.cpio \ -dtb output/images/aspeed-ast2600-evb-nmi.dtb \ -nic user,hostfwd=tcp::2222-:22 \ -device nmi-i2c,address=0x3a \ -serial mon:stdio >From within the booted system, mctp addr add 8 dev mctpi2c15 mctp link set mctpi2c15 up mctp route add 9 via mctpi2c15 mctp neigh add 9 dev mctpi2c15 lladdr 0x3a mi-mctp 1 9 info Comments are very welcome! [1]: https://github.com/birkelund/hwtests/tree/main/br2-external Signed-off-by: Klaus Jensen <k.jen...@samsung.com> --- Changes in v6: - Use nmi_scratch_append() directly where it makes sense. Fixes bug observed by Andrew. - Link to v5: https://lore.kernel.org/r/20230905-nmi-i2c-v5-0-0001d372a...@samsung.com Changes in v5: - Added a nmi_scratch_append() that asserts available space in the scratch buffer. This is a similar defensive strategy as used in hw/i2c/mctp.c - Various small fixups in response to review (Jonathan) - Link to v4: https://lore.kernel.org/r/20230823-nmi-i2c-v4-0-2b0f86e5b...@samsung.com --- Klaus Jensen (3): hw/i2c: add smbus pec utility function hw/i2c: add mctp core hw/nvme: add nvme management interface model MAINTAINERS | 7 + hw/arm/Kconfig | 1 + hw/i2c/Kconfig | 4 + hw/i2c/mctp.c | 432 ++++++++++++++++++++++++++++++++++++++++++ hw/i2c/meson.build | 1 + hw/i2c/smbus_master.c | 26 +++ hw/i2c/trace-events | 13 ++ hw/nvme/Kconfig | 4 + hw/nvme/meson.build | 1 + hw/nvme/nmi-i2c.c | 407 +++++++++++++++++++++++++++++++++++++++ hw/nvme/trace-events | 6 + include/hw/i2c/mctp.h | 125 ++++++++++++ include/hw/i2c/smbus_master.h | 2 + include/net/mctp.h | 35 ++++ 14 files changed, 1064 insertions(+) --- base-commit: 005ad32358f12fe9313a4a01918a55e60d4f39e5 change-id: 20230822-nmi-i2c-d804ed5be7e6 Best regards, -- Klaus Jensen <k.jen...@samsung.com>