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| author | Etienne Carriere <etienne.carriere@linaro.org> | 2021-10-28 17:00:09 +0300 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2021-11-17 14:24:51 +0300 |
| commit | 5f90f189a052f6fc46048f6ce29a37b709548b81 (patch) | |
| tree | a6b64651b8e3a302eeae352d558815aa1927c1fe /drivers/firmware/arm_scmi/Kconfig | |
| parent | b7d2cf7c817b86e705b97f72c6be192a6760a14f (diff) | |
| download | linux-5f90f189a052f6fc46048f6ce29a37b709548b81.tar.xz | |
firmware: arm_scmi: Add optee transport
Add a new transport channel to the SCMI firmware interface driver for
SCMI message exchange based on optee transport channel. The optee
transport is realized by connecting and invoking OP-TEE SCMI service
interface PTA.
Optee transport support (CONFIG_ARM_SCMI_TRANSPORT_OPTEE) is default
enabled when optee driver (CONFIG_OPTEE) is enabled. Effective optee
transport is setup upon OP-TEE SCMI service discovery at optee
device initialization. For this SCMI UUID is registered to the optee
bus for probing. This is done from the link_supplier operator of the
SCMI optee transport.
The optee transport can use a statically defined shared memory in
which case SCMI device tree node defines it using an "arm,scmi-shmem"
compatible phandle through property shmem. Alternatively, optee transport
allocates the shared memory buffer from the optee driver when no shmem
property is defined.
The protocol used to exchange SCMI message over that shared memory is
negotiated between optee transport driver and the OP-TEE service through
capabilities exchange.
OP-TEE SCMI service is integrated in OP-TEE since its release tag 3.13.0.
The service interface is published in [1].
Link: [1] https://github.com/OP-TEE/optee_os/blob/3.13.0/lib/libutee/include/pta_scmi_client.h
Link: https://lore.kernel.org/r/20211028140009.23331-2-etienne.carriere@linaro.org
Cc: Cristian Marussi <cristian.marussi@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi/Kconfig')
| -rw-r--r-- | drivers/firmware/arm_scmi/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/Kconfig b/drivers/firmware/arm_scmi/Kconfig index 3d7081e84853..da1daa593204 100644 --- a/drivers/firmware/arm_scmi/Kconfig +++ b/drivers/firmware/arm_scmi/Kconfig @@ -54,6 +54,18 @@ config ARM_SCMI_TRANSPORT_MAILBOX If you want the ARM SCMI PROTOCOL stack to include support for a transport based on mailboxes, answer Y. +config ARM_SCMI_TRANSPORT_OPTEE + bool "SCMI transport based on OP-TEE service" + depends on OPTEE=y || OPTEE=ARM_SCMI_PROTOCOL + select ARM_SCMI_HAVE_TRANSPORT + select ARM_SCMI_HAVE_SHMEM + default y + help + This enables the OP-TEE service based transport for SCMI. + + If you want the ARM SCMI PROTOCOL stack to include support for a + transport based on OP-TEE SCMI service, answer Y. + config ARM_SCMI_TRANSPORT_SMC bool "SCMI transport based on SMC" depends on HAVE_ARM_SMCCC_DISCOVERY |