# SPDX-License-Identifier: GPL-2.0-only
menu "SCMI Transport Drivers"
config ARM_SCMI_HAVE_TRANSPORT
bool
help
This declares whether at least one SCMI transport has been configured.
Used to trigger a build bug when trying to build SCMI without any
configured transport.
config ARM_SCMI_HAVE_SHMEM
bool
help
This declares whether a shared memory based transport for SCMI is
available.
config ARM_SCMI_HAVE_MSG
bool
help
This declares whether a message passing based transport for SCMI is
available.
config ARM_SCMI_TRANSPORT_MAILBOX
tristate "SCMI transport based on Mailbox"
depends on MAILBOX
select ARM_SCMI_HAVE_TRANSPORT
select ARM_SCMI_HAVE_SHMEM
default y
help
Enable mailbox based transport for SCMI.
If you want the ARM SCMI PROTOCOL stack to include support for a
transport based on mailboxes, answer Y.
This driver can also be built as a module. If so, the module
will be called scmi_transport_mailbox.
config ARM_SCMI_TRANSPORT_SMC
tristate "SCMI transport based on SMC"
depends on HAVE_ARM_SMCCC_DISCOVERY
select ARM_SCMI_HAVE_TRANSPORT
select ARM_SCMI_HAVE_SHMEM
default y
help
Enable SMC based transport for SCMI.
If you want the ARM SCMI PROTOCOL stack to include support for a
transport based on SMC, answer Y.
This driver can also be built as a module. If so, the module
will be called scmi_transport_smc.
config ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE
bool "Enable atomic mode support for SCMI SMC transport"
depends on ARM_SCMI_TRANSPORT_SMC
help
Enable support of atomic operation for SCMI SMC based transport.
If you want the SCMI SMC based transport to operate in atomic
mode, avoiding any kind of sleeping behaviour for selected
transactions on the TX path, answer Y.
Enabling atomic mode operations allows any SCMI driver using this
transport to optionally ask for atomic SCMI transactions and operate
in atomic context too, at the price of using a number of busy-waiting
primitives all over instead. If unsure say N.
config ARM_SCMI_TRANSPORT_OPTEE
tristate "SCMI transport based on OP-TEE service"
depends on OPTEE
select ARM_SCMI_HAVE_TRANSPORT
select ARM_SCMI_HAVE_SHMEM
select ARM_SCMI_HAVE_MSG
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.
This driver can also be built as a module. If so, the module
will be called scmi_transport_optee.
config ARM_SCMI_TRANSPORT_VIRTIO
tristate "SCMI transport based on VirtIO"
depends on VIRTIO
select ARM_SCMI_HAVE_TRANSPORT
select ARM_SCMI_HAVE_MSG
help
This enables the virtio based transport for SCMI.
If you want the ARM SCMI PROTOCOL stack to include support for a
transport based on VirtIO, answer Y.
This driver can also be built as a module. If so, the module
will be called scmi_transport_virtio.
config ARM_SCMI_TRANSPORT_VIRTIO_VERSION1_COMPLIANCE
bool "SCMI VirtIO transport Version 1 compliance"
depends on ARM_SCMI_TRANSPORT_VIRTIO
default y
help
This enforces strict compliance with VirtIO Version 1 specification.
If you want the ARM SCMI VirtIO transport layer to refuse to work
with Legacy VirtIO backends and instead support only VirtIO Version 1
devices (or above), answer Y.
If you want instead to support also old Legacy VirtIO backends (like
the ones implemented by kvmtool) and let the core Kernel VirtIO layer
take care of the needed conversions, say N.
config ARM_SCMI_TRANSPORT_VIRTIO_ATOMIC_ENABLE
bool "Enable atomic mode for SCMI VirtIO transport"
depends on ARM_SCMI_TRANSPORT_VIRTIO
help
Enable support of atomic operation for SCMI VirtIO based transport.
If you want the SCMI VirtIO based transport to operate in atomic
mode, avoiding any kind of sleeping behaviour for selected
transactions on the TX path, answer Y.
Enabling atomic mode operations allows any SCMI driver using this
transport to optionally ask for atomic SCMI transactions and operate
in atomic context too, at the price of using a number of busy-waiting
primitives all over instead. If unsure say N.
endmenu
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