drivers: scmi-msg: fix protocol list querying

Corrects the function reporting the SCMI protocols supported by the
platform to not assume 8 protocol IDs at most can be returned. Indeed
the number of

drivers: scmi-msg: fix protocol list querying

Corrects the function reporting the SCMI protocols supported by the
platform to not assume 8 protocol IDs at most can be returned. Indeed
the number of protocol IDs returned depends on the SCMI output buffer
size.

Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>

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drivers: scmi-msg: fix protocol list response size

Corrects the size of the SCMI response payload when querying the list
of the supported protocol. This response payload size depends on the
number o

drivers: scmi-msg: fix protocol list response size

Corrects the size of the SCMI response payload when querying the list
of the supported protocol. This response payload size depends on the
number of protocols enumerated by the response.

Reported-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
Link: https://lore.kernel.org/lkml/1698297.NAKyZzlH2u@archbook
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>

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drivers: scmi-msg: rename agent_id to channel_id

Rename agent_id reference to channel_id to avoid confusion with the
agent identifiers used in SCMI protocol to identify agent, whereas
the drivers on

drivers: scmi-msg: rename agent_id to channel_id

Rename agent_id reference to channel_id to avoid confusion with the
agent identifiers used in SCMI protocol to identify agent, whereas
the drivers only reference an SCMI channel, whatever the agent ID
associated with the channel and knowing that an SCMI agent can have
several channels to communicate with the SCMI platform/server.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Acked-by: Jerome Forissier <jerome@forissier.org>

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drivers: scmi-msg: refine local header files

Change scmi-msg drivers to define/declare protocol resources in
protocol specific local file instead of from local common.h file.

Signed-off-by: Etienne

drivers: scmi-msg: refine local header files

Change scmi-msg drivers to define/declare protocol resources in
protocol specific local file instead of from local common.h file.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jerome Forissier <jerome@forissier.org>

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core: scmi-msg: minor cleanup

Remove useless local headers file inclusion as "common.h" is included.
Remove a useless inclusion of speculation_barrier.h.
Use BIT() in clock.h.
Refine inline descript

core: scmi-msg: minor cleanup

Remove useless local headers file inclusion as "common.h" is included.
Remove a useless inclusion of speculation_barrier.h.
Use BIT() in clock.h.
Refine inline description of scmi_msg_channel::agent_name in scmi-msg.h.
Fix typo in scmi_smt_fastcall_smc_entry() description inline comment.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jerome Forissier <jerome@forissier.org>

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drivers/scmi-msg: driver for processing scmi messages

This change introduces drivers to allow a platform to create a SCMI
service and register handlers for client request (SCMI agent) on
system reso

drivers/scmi-msg: driver for processing scmi messages

This change introduces drivers to allow a platform to create a SCMI
service and register handlers for client request (SCMI agent) on
system resources. This is the first piece of the drivers: an entry
function, the SCMI base protocol support and helpers for create
the response message.

With this change, scmi_process_message() is the entry function to
process an incoming SCMI message. The function expect the message
is already copied from shared memory into secure memory. The message
structure stores message reference and output buffer reference where
response message shall be stored.

scmi_process_message() calls the SCMI protocol driver according to
the protocol ID in the message. The SCMI protocol driver will call
defined platform handlers according to the message content.

This change introduces only the SCMI base protocol as defined in
SCMI specification v2.0 [1]. Not all the messages defined
in the specification are supported.

SCMI resource in this implementation are dumped or inspired by the
SCP-firmware implementation [2] of the SCMI protocol, server side.

Link: [1] http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/DEN0056A_System_Control_and_Management_Interface.pdf
Link: [2] https://github.com/ARM-software/SCP-firmware.git

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>

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