1# SPDX-License-Identifier: GPL-2.0-only
2menu "ARM System Control and Management Interface Protocol"
3
4config ARM_SCMI_PROTOCOL
5	tristate "ARM System Control and Management Interface (SCMI) Message Protocol"
6	depends on ARM || ARM64 || COMPILE_TEST
7	help
8	  ARM System Control and Management Interface (SCMI) protocol is a
9	  set of operating system-independent software interfaces that are
10	  used in system management. SCMI is extensible and currently provides
11	  interfaces for: Discovery and self-description of the interfaces
12	  it supports, Power domain management which is the ability to place
13	  a given device or domain into the various power-saving states that
14	  it supports, Performance management which is the ability to control
15	  the performance of a domain that is composed of compute engines
16	  such as application processors and other accelerators, Clock
17	  management which is the ability to set and inquire rates on platform
18	  managed clocks and Sensor management which is the ability to read
19	  sensor data, and be notified of sensor value.
20
21	  This protocol library provides interface for all the client drivers
22	  making use of the features offered by the SCMI.
23
24if ARM_SCMI_PROTOCOL
25
26config ARM_SCMI_NEED_DEBUGFS
27	bool
28	help
29	  This declares whether at least one SCMI facility is configured
30	  which needs debugfs support. When selected causess the creation
31	  of a common SCMI debugfs root directory.
32
33config ARM_SCMI_RAW_MODE_SUPPORT
34	bool "Enable support for SCMI Raw transmission mode"
35	depends on DEBUG_FS
36	select ARM_SCMI_NEED_DEBUGFS
37	help
38	  Enable support for SCMI Raw transmission mode.
39
40	  If enabled allows the direct injection and snooping of SCMI bare
41	  messages through a dedicated debugfs interface.
42	  It is meant to be used by SCMI compliance/testing suites.
43
44	  When enabled regular SCMI drivers interactions are inhibited in
45	  order to avoid unexpected interactions with the SCMI Raw message
46	  flow. If unsure say N.
47
48config ARM_SCMI_HAVE_TRANSPORT
49	bool
50	help
51	  This declares whether at least one SCMI transport has been configured.
52	  Used to trigger a build bug when trying to build SCMI without any
53	  configured transport.
54
55config ARM_SCMI_HAVE_SHMEM
56	bool
57	help
58	  This declares whether a shared memory based transport for SCMI is
59	  available.
60
61config ARM_SCMI_HAVE_MSG
62	bool
63	help
64	  This declares whether a message passing based transport for SCMI is
65	  available.
66
67config ARM_SCMI_TRANSPORT_MAILBOX
68	bool "SCMI transport based on Mailbox"
69	depends on MAILBOX
70	select ARM_SCMI_HAVE_TRANSPORT
71	select ARM_SCMI_HAVE_SHMEM
72	default y
73	help
74	  Enable mailbox based transport for SCMI.
75
76	  If you want the ARM SCMI PROTOCOL stack to include support for a
77	  transport based on mailboxes, answer Y.
78
79config ARM_SCMI_TRANSPORT_OPTEE
80	bool "SCMI transport based on OP-TEE service"
81	depends on OPTEE=y || OPTEE=ARM_SCMI_PROTOCOL
82	select ARM_SCMI_HAVE_TRANSPORT
83	select ARM_SCMI_HAVE_SHMEM
84	select ARM_SCMI_HAVE_MSG
85	default y
86	help
87	  This enables the OP-TEE service based transport for SCMI.
88
89	  If you want the ARM SCMI PROTOCOL stack to include support for a
90	  transport based on OP-TEE SCMI service, answer Y.
91
92config ARM_SCMI_TRANSPORT_SMC
93	bool "SCMI transport based on SMC"
94	depends on HAVE_ARM_SMCCC_DISCOVERY
95	select ARM_SCMI_HAVE_TRANSPORT
96	select ARM_SCMI_HAVE_SHMEM
97	default y
98	help
99	  Enable SMC based transport for SCMI.
100
101	  If you want the ARM SCMI PROTOCOL stack to include support for a
102	  transport based on SMC, answer Y.
103
104config ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE
105	bool "Enable atomic mode support for SCMI SMC transport"
106	depends on ARM_SCMI_TRANSPORT_SMC
107	help
108	  Enable support of atomic operation for SCMI SMC based transport.
109
110	  If you want the SCMI SMC based transport to operate in atomic
111	  mode, avoiding any kind of sleeping behaviour for selected
112	  transactions on the TX path, answer Y.
113	  Enabling atomic mode operations allows any SCMI driver using this
114	  transport to optionally ask for atomic SCMI transactions and operate
115	  in atomic context too, at the price of using a number of busy-waiting
116	  primitives all over instead. If unsure say N.
117
118config ARM_SCMI_TRANSPORT_VIRTIO
119	bool "SCMI transport based on VirtIO"
120	depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL
121	select ARM_SCMI_HAVE_TRANSPORT
122	select ARM_SCMI_HAVE_MSG
123	help
124	  This enables the virtio based transport for SCMI.
125
126	  If you want the ARM SCMI PROTOCOL stack to include support for a
127	  transport based on VirtIO, answer Y.
128
129config ARM_SCMI_TRANSPORT_VIRTIO_VERSION1_COMPLIANCE
130	bool "SCMI VirtIO transport Version 1 compliance"
131	depends on ARM_SCMI_TRANSPORT_VIRTIO
132	default y
133	help
134	  This enforces strict compliance with VirtIO Version 1 specification.
135
136	  If you want the ARM SCMI VirtIO transport layer to refuse to work
137	  with Legacy VirtIO backends and instead support only VirtIO Version 1
138	  devices (or above), answer Y.
139
140	  If you want instead to support also old Legacy VirtIO backends (like
141	  the ones implemented by kvmtool) and let the core Kernel VirtIO layer
142	  take care of the needed conversions, say N.
143
144config ARM_SCMI_TRANSPORT_VIRTIO_ATOMIC_ENABLE
145	bool "Enable atomic mode for SCMI VirtIO transport"
146	depends on ARM_SCMI_TRANSPORT_VIRTIO
147	help
148	  Enable support of atomic operation for SCMI VirtIO based transport.
149
150	  If you want the SCMI VirtIO based transport to operate in atomic
151	  mode, avoiding any kind of sleeping behaviour for selected
152	  transactions on the TX path, answer Y.
153
154	  Enabling atomic mode operations allows any SCMI driver using this
155	  transport to optionally ask for atomic SCMI transactions and operate
156	  in atomic context too, at the price of using a number of busy-waiting
157	  primitives all over instead. If unsure say N.
158
159endif #ARM_SCMI_PROTOCOL
160
161config ARM_SCMI_POWER_DOMAIN
162	tristate "SCMI power domain driver"
163	depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
164	default y
165	select PM_GENERIC_DOMAINS if PM
166	help
167	  This enables support for the SCMI power domains which can be
168	  enabled or disabled via the SCP firmware
169
170	  This driver can also be built as a module.  If so, the module
171	  will be called scmi_pm_domain. Note this may needed early in boot
172	  before rootfs may be available.
173
174config ARM_SCMI_POWER_CONTROL
175	tristate "SCMI system power control driver"
176	depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
177	help
178	  This enables System Power control logic which binds system shutdown or
179	  reboot actions to SCMI System Power notifications generated by SCP
180	  firmware.
181
182	  This driver can also be built as a module.  If so, the module will be
183	  called scmi_power_control. Note this may needed early in boot to catch
184	  early shutdown/reboot SCMI requests.
185
186endmenu
187