kernel/linux.git/include/linux/mei_cl_bus.h, branch v6.19.12

mei: bus: add mei_cldev_mtu interface

2025-09-18T16:31:50+00:00

Add a new helper function that allows MEI client drivers to query the maximum transmission unit (MTU) for a connected MEI client. This is useful for clients that need to transmit large payloads, such as firmware blobs, allowing them to determine the maximum message size that can be safely sent before starting transmission and size of the buffer to allocate when receiving data. Reviewed-by: Mika Westerberg Signed-off-by: Alexander Usyskin Signed-off-by: Badal Nilawar Reviewed-by: Umesh Nerlige Ramappa Signed-off-by: Rodrigo Vivi Acked-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20250905154953.3974335-2-badal.nilawar@intel.com Signed-off-by: Lucas De Marchi

mei: Remove unused functions

2025-02-20T14:24:13+00:00

The following functions have been in the mei code for a long time but have never been used. mei_txe_setup_satt2() was added in 2014 by commit 32e2b59fca2c ("mei: txe: add hw-txe.c") mei_me_cl_rm_by_uuid_id() was added in 2015 by commit 79563db9ddd3 ("mei: add reference counting for me clients") mei_cldev_uuid() was added in 2015 by commit baeacd037697 ("mei: bus: export uuid and protocol version to mei_cl bus drivers") mei_cldev_recv_nonblock() was added in 2016 by commit 076802d00615 ("mei: bus: enable non-blocking RX") it is the only user of mei_cldev_recv_nonblock_vtag(). Remove them. Signed-off-by: Dr. David Alan Gilbert Acked-by: Arnd Bergmann Reviewed-by: Alexander Usyskin Link: https://lore.kernel.org/r/20250130012654.255119-1-linux@treblig.org Signed-off-by: Greg Kroah-Hartman

mei: docs: fix spelling errors

2023-10-18T08:01:33+00:00

Fix spelling errors in the mei code base. Signed-off-by: Tomas Winkler Reviewed-by: Randy Dunlap Link: https://lore.kernel.org/r/20231011074301.223879-4-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: bus: add send and recv api with timeout

2023-10-18T08:01:33+00:00

Add variation of the send and recv functions on bus that define timeout. Caller can use such functions in flow that can stuck to bail out and not to put down the whole system. Signed-off-by: Alexander Usyskin Signed-off-by: Alan Previn Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20231011110157.247552-2-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: bus: extend bus API to support command streamer API

2022-10-03T18:29:10+00:00

Add mei bus API for sending gsc commands: mei_cldev_send_gsc_command() The GSC commands are originated in the graphics stack and are in form of SGL DMA buffers. The GSC commands are synchronous, the response is received in the same call on the out sg list buffers. The function setups pointers for in and out sg lists in the mei sgl extended header and sends it to the firmware. Signed-off-by: Vitaly Lubart Signed-off-by: Tomas Winkler Signed-off-by: Daniele Ceraolo Spurio Cc: Greg Kroah-Hartman Reviewed-by: Greg Kroah-Hartman Link: https://patchwork.freedesktop.org/patch/msgid/20220928004145.745803-5-daniele.ceraolospurio@intel.com

mei: bus: add client dma interface

2021-11-26T16:31:46+00:00

Expose the client dma mapping via mei client bus interface. The client dma has to be mapped before the device is enabled, therefore we need to create device linking already during mapping and we need to unmap after the client is disable hence we need to postpone the unlink and flush till unmapping or when destroying the device. Signed-off-by: Alexander Usyskin Co-developed-by: Tomas Winkler Signed-off-by: Tomas Winkler Signed-off-by: Emmanuel Grumbach Acked-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20210420172755.12178-1-emmanuel.grumbach@intel.com Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20211112062814.7502-1-emmanuel.grumbach@intel.com

mei: constify passed buffers and structures

2021-07-29T15:08:04+00:00

Buffers and structures passed to MEI bus and client API can be made const for safer code and clear indication that it is not modified. Acked-by: Arnd Bergmann Acked-by: Tomas Winkler Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20210729102803.46289-1-krzysztof.kozlowski@canonical.com Signed-off-by: Greg Kroah-Hartman

mei: bus: change remove callback to return void

2021-02-09T08:30:16+00:00

The driver core ignores the return value of mei_cl_device_remove() so passing an error value doesn't solve any problem. As most mei drivers' remove callbacks return 0 unconditionally and returning a different value doesn't have any effect, change this prototype to return void and return 0 unconditionally in mei_cl_device_remove(). The only driver that could return an error value is modified to emit an explicit warning in the error case. Acked-by: Guenter Roeck Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20210208073705.428185-3-uwe@kleine-koenig.org Signed-off-by: Greg Kroah-Hartman

mei: bus: add vtag support

2020-12-07T09:29:57+00:00

Add API to support vtag in communication on mei bus. Add mei_cldev_send_vtag, mei_cldev_recv_vtag and mei_cldev_recv_nonblock_vtag functions to allow sending a message with vtag set and to receive vtag of an incoming message. Cc: Sean Z Huang Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20201116125612.1660971-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: adjust the copyright notice in the files.

2019-03-27T17:07:54+00:00

Use unified version of the copyright notice in the files Update copyright years according the year the files were touched, except this patch and SPDX conversions. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman