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| author | Cristian Marussi <cristian.marussi@arm.com> | 2023-01-18 12:14:26 +0000 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2023-01-20 11:41:37 +0000 |
| commit | 7860701d1e6e6e048960567d4767d93d693d6faa (patch) | |
| tree | a3602cea5964c5d68911eb9a23ad27c7c4c06fbe /Documentation/ABI | |
| parent | 9c54633e4e3d004c416ad680d6b0f73c2ac6f018 (diff) | |
| download | linux-7860701d1e6e6e048960567d4767d93d693d6faa.tar.gz linux-7860701d1e6e6e048960567d4767d93d693d6faa.tar.bz2 linux-7860701d1e6e6e048960567d4767d93d693d6faa.zip | |
firmware: arm_scmi: Add per-channel raw injection support
On a system configured with multiple transport channels, expose a few
additional debugfs per-channel entries to allow a user to explicitly select
which transport channel to use for the SCMI message injection.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-18-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/debugfs-scmi-raw | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/debugfs-scmi-raw b/Documentation/ABI/testing/debugfs-scmi-raw index 45817d465b1f..5468ec08c084 100644 --- a/Documentation/ABI/testing/debugfs-scmi-raw +++ b/Documentation/ABI/testing/debugfs-scmi-raw @@ -64,3 +64,46 @@ Description: SCMI Raw stack reset facility; writing a value to this entry Can be used to reset and clean the SCMI Raw stack between to different test-run. Users: Debugging, any userspace test suite + +What: /sys/kernel/debug/scmi/<n>/raw/channels/<m>/message +Date: March 2023 +KernelVersion: 6.3 +Contact: cristian.marussi@arm.com +Description: SCMI Raw synchronous message injection/snooping facility; write + a complete SCMI synchronous command message (header included) + in little-endian binary format to have it sent to the configured + backend SCMI server for instance <n> through the <m> transport + channel. + Any subsequently received response can be read from this same + entry if it arrived on channel <m> within the configured + timeout. + Each write to the entry causes one command request to be built + and sent while the replies are read back one message at time + (receiving an EOF at each message boundary). + Note that these per-channel entries rooted at <..>/channels + exist only if the transport is configured to have more than + one channel. +Users: Debugging, any userspace test suite + +What: /sys/kernel/debug/scmi/<n>/raw/channels/<m>/message_async +Date: March 2023 +KernelVersion: 6.3 +Contact: cristian.marussi@arm.com +Description: SCMI Raw asynchronous message injection/snooping facility; write + a complete SCMI asynchronous command message (header included) + in little-endian binary format to have it sent to the configured + backend SCMI server for instance <n> through the <m> transport + channel. + Any subsequently received response can be read from this same + entry if it arrived on channel <m> within the configured + timeout. + Any additional delayed response received afterwards can be read + from this same entry too if it arrived within the configured + timeout. + Each write to the entry causes one command request to be built + and sent while the replies are read back one message at time + (receiving an EOF at each message boundary). + Note that these per-channel entries rooted at <..>/channels + exist only if the transport is configured to have more than + one channel. +Users: Debugging, any userspace test suite |