1e8419c24SCristian Marussi# SPDX-License-Identifier: GPL-2.0-only 2e8419c24SCristian Marussimenu "ARM System Control and Management Interface Protocol" 3e8419c24SCristian Marussi 4e8419c24SCristian Marussiconfig ARM_SCMI_PROTOCOL 5e8419c24SCristian Marussi tristate "ARM System Control and Management Interface (SCMI) Message Protocol" 6e8419c24SCristian Marussi depends on ARM || ARM64 || COMPILE_TEST 7e8419c24SCristian Marussi help 8e8419c24SCristian Marussi ARM System Control and Management Interface (SCMI) protocol is a 9e8419c24SCristian Marussi set of operating system-independent software interfaces that are 10e8419c24SCristian Marussi used in system management. SCMI is extensible and currently provides 11e8419c24SCristian Marussi interfaces for: Discovery and self-description of the interfaces 12e8419c24SCristian Marussi it supports, Power domain management which is the ability to place 13e8419c24SCristian Marussi a given device or domain into the various power-saving states that 14e8419c24SCristian Marussi it supports, Performance management which is the ability to control 15e8419c24SCristian Marussi the performance of a domain that is composed of compute engines 16e8419c24SCristian Marussi such as application processors and other accelerators, Clock 17e8419c24SCristian Marussi management which is the ability to set and inquire rates on platform 18e8419c24SCristian Marussi managed clocks and Sensor management which is the ability to read 19e8419c24SCristian Marussi sensor data, and be notified of sensor value. 20e8419c24SCristian Marussi 21e8419c24SCristian Marussi This protocol library provides interface for all the client drivers 22e8419c24SCristian Marussi making use of the features offered by the SCMI. 23e8419c24SCristian Marussi 24e8419c24SCristian Marussiif ARM_SCMI_PROTOCOL 25e8419c24SCristian Marussi 26e8419c24SCristian Marussiconfig ARM_SCMI_HAVE_TRANSPORT 27e8419c24SCristian Marussi bool 28e8419c24SCristian Marussi help 29e8419c24SCristian Marussi This declares whether at least one SCMI transport has been configured. 30e8419c24SCristian Marussi Used to trigger a build bug when trying to build SCMI without any 31e8419c24SCristian Marussi configured transport. 32e8419c24SCristian Marussi 33a7b1138bSIgor Skalkinconfig ARM_SCMI_HAVE_SHMEM 34a7b1138bSIgor Skalkin bool 35a7b1138bSIgor Skalkin help 36a7b1138bSIgor Skalkin This declares whether a shared memory based transport for SCMI is 37a7b1138bSIgor Skalkin available. 38a7b1138bSIgor Skalkin 39f301bba0SPeter Hilberconfig ARM_SCMI_HAVE_MSG 40f301bba0SPeter Hilber bool 41f301bba0SPeter Hilber help 42f301bba0SPeter Hilber This declares whether a message passing based transport for SCMI is 43f301bba0SPeter Hilber available. 44f301bba0SPeter Hilber 45e8419c24SCristian Marussiconfig ARM_SCMI_TRANSPORT_MAILBOX 46e8419c24SCristian Marussi bool "SCMI transport based on Mailbox" 47e8419c24SCristian Marussi depends on MAILBOX 48e8419c24SCristian Marussi select ARM_SCMI_HAVE_TRANSPORT 49a7b1138bSIgor Skalkin select ARM_SCMI_HAVE_SHMEM 50e8419c24SCristian Marussi default y 51e8419c24SCristian Marussi help 52e8419c24SCristian Marussi Enable mailbox based transport for SCMI. 53e8419c24SCristian Marussi 54e8419c24SCristian Marussi If you want the ARM SCMI PROTOCOL stack to include support for a 55e8419c24SCristian Marussi transport based on mailboxes, answer Y. 56e8419c24SCristian Marussi 575f90f189SEtienne Carriereconfig ARM_SCMI_TRANSPORT_OPTEE 585f90f189SEtienne Carriere bool "SCMI transport based on OP-TEE service" 595f90f189SEtienne Carriere depends on OPTEE=y || OPTEE=ARM_SCMI_PROTOCOL 605f90f189SEtienne Carriere select ARM_SCMI_HAVE_TRANSPORT 615f90f189SEtienne Carriere select ARM_SCMI_HAVE_SHMEM 625f90f189SEtienne Carriere default y 635f90f189SEtienne Carriere help 645f90f189SEtienne Carriere This enables the OP-TEE service based transport for SCMI. 655f90f189SEtienne Carriere 665f90f189SEtienne Carriere If you want the ARM SCMI PROTOCOL stack to include support for a 675f90f189SEtienne Carriere transport based on OP-TEE SCMI service, answer Y. 685f90f189SEtienne Carriere 69e8419c24SCristian Marussiconfig ARM_SCMI_TRANSPORT_SMC 70e8419c24SCristian Marussi bool "SCMI transport based on SMC" 71e8419c24SCristian Marussi depends on HAVE_ARM_SMCCC_DISCOVERY 72e8419c24SCristian Marussi select ARM_SCMI_HAVE_TRANSPORT 73a7b1138bSIgor Skalkin select ARM_SCMI_HAVE_SHMEM 74e8419c24SCristian Marussi default y 75e8419c24SCristian Marussi help 76e8419c24SCristian Marussi Enable SMC based transport for SCMI. 77e8419c24SCristian Marussi 78e8419c24SCristian Marussi If you want the ARM SCMI PROTOCOL stack to include support for a 79e8419c24SCristian Marussi transport based on SMC, answer Y. 80e8419c24SCristian Marussi 810bfdca8aSCristian Marussiconfig ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE 820bfdca8aSCristian Marussi bool "Enable atomic mode support for SCMI SMC transport" 830bfdca8aSCristian Marussi depends on ARM_SCMI_TRANSPORT_SMC 840bfdca8aSCristian Marussi help 850bfdca8aSCristian Marussi Enable support of atomic operation for SCMI SMC based transport. 860bfdca8aSCristian Marussi 870bfdca8aSCristian Marussi If you want the SCMI SMC based transport to operate in atomic 880bfdca8aSCristian Marussi mode, avoiding any kind of sleeping behaviour for selected 890bfdca8aSCristian Marussi transactions on the TX path, answer Y. 900bfdca8aSCristian Marussi Enabling atomic mode operations allows any SCMI driver using this 910bfdca8aSCristian Marussi transport to optionally ask for atomic SCMI transactions and operate 920bfdca8aSCristian Marussi in atomic context too, at the price of using a number of busy-waiting 930bfdca8aSCristian Marussi primitives all over instead. If unsure say N. 940bfdca8aSCristian Marussi 9546abe13bSIgor Skalkinconfig ARM_SCMI_TRANSPORT_VIRTIO 9646abe13bSIgor Skalkin bool "SCMI transport based on VirtIO" 97c90521a0SCristian Marussi depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL 9846abe13bSIgor Skalkin select ARM_SCMI_HAVE_TRANSPORT 9946abe13bSIgor Skalkin select ARM_SCMI_HAVE_MSG 10046abe13bSIgor Skalkin help 10146abe13bSIgor Skalkin This enables the virtio based transport for SCMI. 10246abe13bSIgor Skalkin 10346abe13bSIgor Skalkin If you want the ARM SCMI PROTOCOL stack to include support for a 10446abe13bSIgor Skalkin transport based on VirtIO, answer Y. 10546abe13bSIgor Skalkin 106530897ecSCristian Marussiconfig ARM_SCMI_TRANSPORT_VIRTIO_VERSION1_COMPLIANCE 107530897ecSCristian Marussi bool "SCMI VirtIO transport Version 1 compliance" 108530897ecSCristian Marussi depends on ARM_SCMI_TRANSPORT_VIRTIO 109530897ecSCristian Marussi default y 110530897ecSCristian Marussi help 111530897ecSCristian Marussi This enforces strict compliance with VirtIO Version 1 specification. 112530897ecSCristian Marussi 113530897ecSCristian Marussi If you want the ARM SCMI VirtIO transport layer to refuse to work 114530897ecSCristian Marussi with Legacy VirtIO backends and instead support only VirtIO Version 1 115530897ecSCristian Marussi devices (or above), answer Y. 116530897ecSCristian Marussi 117530897ecSCristian Marussi If you want instead to support also old Legacy VirtIO backends (like 118530897ecSCristian Marussi the ones implemented by kvmtool) and let the core Kernel VirtIO layer 119530897ecSCristian Marussi take care of the needed conversions, say N. 120530897ecSCristian Marussi 121*5a3b7185SCristian Marussiconfig ARM_SCMI_TRANSPORT_VIRTIO_ATOMIC_ENABLE 122*5a3b7185SCristian Marussi bool "Enable atomic mode for SCMI VirtIO transport" 123*5a3b7185SCristian Marussi depends on ARM_SCMI_TRANSPORT_VIRTIO 124*5a3b7185SCristian Marussi help 125*5a3b7185SCristian Marussi Enable support of atomic operation for SCMI VirtIO based transport. 126*5a3b7185SCristian Marussi 127*5a3b7185SCristian Marussi If you want the SCMI VirtIO based transport to operate in atomic 128*5a3b7185SCristian Marussi mode, avoiding any kind of sleeping behaviour for selected 129*5a3b7185SCristian Marussi transactions on the TX path, answer Y. 130*5a3b7185SCristian Marussi 131*5a3b7185SCristian Marussi Enabling atomic mode operations allows any SCMI driver using this 132*5a3b7185SCristian Marussi transport to optionally ask for atomic SCMI transactions and operate 133*5a3b7185SCristian Marussi in atomic context too, at the price of using a number of busy-waiting 134*5a3b7185SCristian Marussi primitives all over instead. If unsure say N. 135*5a3b7185SCristian Marussi 136e8419c24SCristian Marussiendif #ARM_SCMI_PROTOCOL 137e8419c24SCristian Marussi 138e8419c24SCristian Marussiconfig ARM_SCMI_POWER_DOMAIN 139e8419c24SCristian Marussi tristate "SCMI power domain driver" 140e8419c24SCristian Marussi depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF) 141e8419c24SCristian Marussi default y 142e8419c24SCristian Marussi select PM_GENERIC_DOMAINS if PM 143e8419c24SCristian Marussi help 144e8419c24SCristian Marussi This enables support for the SCMI power domains which can be 145e8419c24SCristian Marussi enabled or disabled via the SCP firmware 146e8419c24SCristian Marussi 147e8419c24SCristian Marussi This driver can also be built as a module. If so, the module 148e8419c24SCristian Marussi will be called scmi_pm_domain. Note this may needed early in boot 149e8419c24SCristian Marussi before rootfs may be available. 150e8419c24SCristian Marussi 151e8419c24SCristian Marussiendmenu 152