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1What: /sys/kernel/debug/scmi/<n>/raw/message
2Date: March 2023
3KernelVersion: 6.3
4Contact: cristian.marussi@arm.com
5Description: SCMI Raw synchronous message injection/snooping facility; write
6 a complete SCMI synchronous command message (header included)
7 in little-endian binary format to have it sent to the configured
8 backend SCMI server for instance <n>.
9 Any subsequently received response can be read from this same
10 entry if it arrived within the configured timeout.
11 Each write to the entry causes one command request to be built
12 and sent while the replies are read back one message at time
13 (receiving an EOF at each message boundary).
14Users: Debugging, any userspace test suite
15
16What: /sys/kernel/debug/scmi/<n>/raw/message_async
17Date: March 2023
18KernelVersion: 6.3
19Contact: cristian.marussi@arm.com
20Description: SCMI Raw asynchronous message injection/snooping facility; write
21 a complete SCMI asynchronous command message (header included)
22 in little-endian binary format to have it sent to the configured
23 backend SCMI server for instance <n>.
24 Any subsequently received response can be read from this same
25 entry if it arrived within the configured timeout.
26 Any additional delayed response received afterwards can be read
27 from this same entry too if it arrived within the configured
28 timeout.
29 Each write to the entry causes one command request to be built
30 and sent while the replies are read back one message at time
31 (receiving an EOF at each message boundary).
32Users: Debugging, any userspace test suite
33
34What: /sys/kernel/debug/scmi/<n>/raw/errors
35Date: March 2023
36KernelVersion: 6.3
37Contact: cristian.marussi@arm.com
38Description: SCMI Raw message errors facility; any kind of timed-out or
39 generally unexpectedly received SCMI message, for instance <n>,
40 can be read from this entry.
41 Each read gives back one message at time (receiving an EOF at
42 each message boundary).
43Users: Debugging, any userspace test suite
44
45What: /sys/kernel/debug/scmi/<n>/raw/notification
46Date: March 2023
47KernelVersion: 6.3
48Contact: cristian.marussi@arm.com
49Description: SCMI Raw notification snooping facility; any notification
50 emitted by the backend SCMI server, for instance <n>, can be
51 read from this entry.
52 Each read gives back one message at time (receiving an EOF at
53 each message boundary).
54Users: Debugging, any userspace test suite
55
56What: /sys/kernel/debug/scmi/<n>/raw/reset
57Date: March 2023
58KernelVersion: 6.3
59Contact: cristian.marussi@arm.com
60Description: SCMI Raw stack reset facility; writing a value to this entry
61 causes the internal queues of any kind of received message,
62 still pending to be read out for instance <n>, to be immediately
63 flushed.
64 Can be used to reset and clean the SCMI Raw stack between to
65 different test-run.
66Users: Debugging, any userspace test suite
67
68What: /sys/kernel/debug/scmi/<n>/raw/channels/<m>/message
69Date: March 2023
70KernelVersion: 6.3
71Contact: cristian.marussi@arm.com
72Description: SCMI Raw synchronous message injection/snooping facility; write
73 a complete SCMI synchronous command message (header included)
74 in little-endian binary format to have it sent to the configured
75 backend SCMI server for instance <n> through the <m> transport
76 channel.
77 Any subsequently received response can be read from this same
78 entry if it arrived on channel <m> within the configured
79 timeout.
80 Each write to the entry causes one command request to be built
81 and sent while the replies are read back one message at time
82 (receiving an EOF at each message boundary).
83 Channel identifier <m> matches the SCMI protocol number which
84 has been associated with this transport channel in the DT
85 description, with base protocol number 0x10 being the default
86 channel for this instance.
87 Note that these per-channel entries rooted at <..>/channels
88 exist only if the transport is configured to have more than
89 one default channel.
90Users: Debugging, any userspace test suite
91
92What: /sys/kernel/debug/scmi/<n>/raw/channels/<m>/message_async
93Date: March 2023
94KernelVersion: 6.3
95Contact: cristian.marussi@arm.com
96Description: SCMI Raw asynchronous message injection/snooping facility; write
97 a complete SCMI asynchronous command message (header included)
98 in little-endian binary format to have it sent to the configured
99 backend SCMI server for instance <n> through the <m> transport
100 channel.
101 Any subsequently received response can be read from this same
102 entry if it arrived on channel <m> within the configured
103 timeout.
104 Any additional delayed response received afterwards can be read
105 from this same entry too if it arrived within the configured
106 timeout.
107 Each write to the entry causes one command request to be built
108 and sent while the replies are read back one message at time
109 (receiving an EOF at each message boundary).
110 Channel identifier <m> matches the SCMI protocol number which
111 has been associated with this transport channel in the DT
112 description, with base protocol number 0x10 being the default
113 channel for this instance.
114 Note that these per-channel entries rooted at <..>/channels
115 exist only if the transport is configured to have more than
116 one default channel.
117Users: Debugging, any userspace test suite