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| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2025-09-05 21:19:45 +0530 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2025-09-18 09:31:50 -0700 |
| commit | 8d5b7009aabc27e626e4167fedf1e1c1c3d6b143 (patch) | |
| tree | dcf8899ffdfd1814ece9c27b0e19c419f106d47a /drivers/misc | |
| parent | drm/xe: Work around clang multiple goto-label error (diff) | |
| download | linux-8d5b7009aabc27e626e4167fedf1e1c1c3d6b143.tar.gz linux-8d5b7009aabc27e626e4167fedf1e1c1c3d6b143.zip | |
mei: bus: add mei_cldev_mtu interface
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 <mika.westerberg@linux.intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Badal Nilawar <badal.nilawar@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250905154953.3974335-2-badal.nilawar@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/mei/bus.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 5cc3ad07d5be..09aae8f9d225 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -615,6 +615,19 @@ u8 mei_cldev_ver(const struct mei_cl_device *cldev) EXPORT_SYMBOL_GPL(mei_cldev_ver); /** + * mei_cldev_mtu - max message that client can send and receive + * + * @cldev: mei client device + * + * Return: mtu or 0 if client is not connected + */ +size_t mei_cldev_mtu(const struct mei_cl_device *cldev) +{ + return mei_cl_mtu(cldev->cl); +} +EXPORT_SYMBOL_GPL(mei_cldev_mtu); + +/** * mei_cldev_enabled - check whether the device is enabled * * @cldev: mei client device |