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| author | Lukasz Luba <lukasz.luba@arm.com> | 2019-12-17 14:43:45 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2019-12-30 13:34:37 +0100 |
| commit | 729d3530a50417a88f3f485ba2dc88ff8adfeacb (patch) | |
| tree | e584b5e58a5aa6a84c901f18129dd1388f30c9b0 /drivers/firmware/arm_scmi/common.h | |
| parent | include: trace: Add SCMI header with trace events (diff) | |
| download | linux-729d3530a50417a88f3f485ba2dc88ff8adfeacb.tar.xz linux-729d3530a50417a88f3f485ba2dc88ff8adfeacb.zip | |
drivers: firmware: scmi: Extend SCMI transport layer by trace events
The SCMI transport layer communicates via mailboxes and shared memory with
firmware running on a microcontroller. It is platform specific how long it
takes to pass a SCMI message. The most sensitive requests are coming from
CPUFreq subsystem, which might be used by the scheduler.
Thus, there is a need to measure these delays and capture anomalies.
This change introduces trace events wrapped around transfer code.
According to Jim's suggestion a unique transfer_id is to distinguish
similar entries which might have the same message id, protocol id and
sequence. This is a case then there are some timeouts in transfers.
Suggested-by: Jim Quinlan <james.quinlan@broadcom.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi/common.h')
| -rw-r--r-- | drivers/firmware/arm_scmi/common.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index 5237c2ff79fe..df35358ff324 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -81,6 +81,7 @@ struct scmi_msg { /** * struct scmi_xfer - Structure representing a message flow * + * @transfer_id: Unique ID for debug & profiling purpose * @hdr: Transmit message header * @tx: Transmit message * @rx: Receive message, the buffer should be pre-allocated to store @@ -90,6 +91,7 @@ struct scmi_msg { * @async: pointer to delayed response message received event completion */ struct scmi_xfer { + int transfer_id; struct scmi_msg_hdr hdr; struct scmi_msg tx; struct scmi_msg rx; |