linux-toradex.git/drivers/misc/mei/mei_dev.h, branch v4.15-rc2

mei: make mei_cl_bus_rescan static

2017-05-25T16:24:03+00:00

mei_cl_bus_rescan is used only in bus.c,
so make it local to the file and mark static.

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

mei: drop amthif internal client

2017-04-08T15:38:25+00:00

AMTHIF has special support in the mei drive, it handles multiplexing
multiple user space connection above single me client connection.
Since there is no additional addressing information there is a strict
requirement on the traffic order on each connection and on the "read
after write" order within the connection. This creates a lot of
complexity mostly because the other client types do not necessarily fall
under the same restriction.    After carefully studying the use of the
AMTHIF client, we came to conclusion that the multiplexing is not really
utilized by any application and we may safely remove that support and
significantly simplify the driver.

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

mei: replace callback structures used as list head by list_head

2017-01-31T10:07:43+00:00

mei_dev structure used struct mei_cl_cb type variables as for holding
callbacks list heads.  Replace them by the actual struct list_head
as there is no other info that is handled. This slims down
the mei_dev structure and mostly streamline the code.

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

mei: bus: prevent hardware module unload if device on bus is active

2017-01-31T10:07:43+00:00

The hardware module should not be unloaded if the bus
has active devices.
Get get_/put_ bus parent module upon client device
connection/disconnection, to prevent the hardware managing
module to disappear underneath.

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

mei: bus: enable OS version only for SPT and newer

2017-01-11T06:43:57+00:00

Sending OS version for support of TPM2_ChangeEPS() is required only
for SPT FW (HMB version 2.0) and newer.
On older platforms the command should be just ignored by the firmware
but some older platforms misbehave so it's safer to send the command
only if required.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=192051
Fixes: 7279b238bade (mei: send OS type to the FW)
Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Tested-by: Jan Niehusmann 
Signed-off-by: Greg Kroah-Hartman

mei: bus: enable non-blocking RX

2016-12-06T10:05:46+00:00

Enable non-blocking receive for drivers on mei bus, this allows checking
for data availability by mei client drivers. This is most effective for
fixed address clients, that lacks flow control.

This function adds new API function mei_cldev_recv_nonblock(), it
retuns -EGAIN if function will block.

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

mei: synchronize irq before initiating a reset.

2016-12-06T10:03:22+00:00

We need to synchronize irqs before issuing reset to make sure that the
clients communication is concluded and doesn't leak to the reset flow
and confusing the state machine.

This issue is happening during suspend/resume stress testing.

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

mei: introduce host client uninitialized state

2016-11-17T15:37:49+00:00

Introduce a new host client state, MEI_FILE_UNINITIALIZED,
to distinguish client objects that was unlinked,
but not destroyed and can be linked again.

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

mei: constify buffer in the write functions calls

2016-11-15T09:56:52+00:00

The write buffer should not by modified so make it constant. Also
hitchhike some style fixes on the way in the interface and rename
mei_me_write_message to mei_me_hbuf_write for consistency.

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

mei: enable to set the internal flag for client write

2016-11-10T12:18:02+00:00

Prepare the client write functions to set the internal flag in message
header. Carry both blocking and internal modes inside the transmit cb,
and call internal bus function  __mei_cl_send() with send mode bit mask.
The Internal flag should be added only on messages generated by the
driver.

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