linux-toradex.git/Documentation/ABI/testing/sysfs-class-mei, branch v6.15

ABI: sysfs-class-mei: use wildcards on What definitions

2021-09-21T16:31:16+00:00

An "N" upper letter is not a wildcard, nor can easily be identified
by script, specially since the USB sysfs define things like.
bNumInterfaces. Use, instead, , in order to let script/get_abi.pl
to convert it into a Regex.

Signed-off-by: Mauro Carvalho Chehab 
Link: https://lore.kernel.org/r/3789f936a637f1b4059400099ae7a592cd4df8f5.1631782432.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman

mei: add device kind to sysfs

2020-07-29T14:21:13+00:00

Some of the mei device heads are not generic and have
a specific purpose, we need to announce it to the user space
so it is possible to detect the correct device node via
matching attributes.

Generic heads are marked as 'mei' while special purpose heads
have their own names. Currently we are adding 'itouch' string
for Intel IPTS 1.0, 2.0 devices.

This is done via new sysfs attribute 'kind'.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Link: https://lore.kernel.org/r/20200728192242.3117779-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman

mei: add trc detection register to sysfs

2019-11-07T08:37:27+00:00

The glitch detection HW (TRC) save it status information into
TRC status register.
Make it available to user-space via read-only sysfs file.
The TRC register is availab for PCH15 gen and newer, for older
platforms reading the sysfs file will fail with EOPNOTSUPP.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Link: https://lore.kernel.org/r/20191107104445.19101-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman

mei: expose device state in sysfs

2019-04-25T17:33:34+00:00

Expose mei device state to user-space through sysfs.
This gives indication to applications that driver is in transition,
usefully mostly to detect link reset state.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: expose fw version to sysfs

2018-07-03T11:11:20+00:00

The ME FW version is constantly used by detection and update tools.
To improve the reliability and simplify these tools provide
a sysfs interface to access version of the platform ME firmware
in the following format:
:....
There can be up to three such blocks for different FW components.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: limit the number of queued writes

2018-03-14T18:33:13+00:00

Limit the number of queued writes per client.
Writes above this threshold are blocked till place
in the transmit queue is available.
The limit is configurable via sysfs and defaults to 50.
The implementation should provide blocking I/O behavior.
Prior to this change one would end up in the hands of OOM.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: show the HBM protocol versions in the device attributes

2016-10-31T10:00:09+00:00

The HBM protocol version is negotiated during the setup phase, then settled
on a highest possible common version of the driver and the firmware.
The sysfs API advertises both negotiated and driver supported versions
in the device attributes.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: add ABI documentation for fw_status exported through sysfs

2015-01-09T22:53:13+00:00

Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: sysfs: add Documentation mei class attributes

2014-07-09T21:19:34+00:00

Add sysfs attributes Documentation entries
for /sys/class/mei

Signed-off-by: Tomas Winkler 
Signed-off-by: Alexander Usyskin 
Signed-off-by: Greg Kroah-Hartman