Add a new sysfs group which has nodes to monitor data/request transfer
performance. This sysfs group has nodes showing total sectors/requests
transferred, total busy time spent and max/min/avg/sum latencies.
Signed-off-by: Can Guo <c...@codeaurora.org>
---
Documentation/ABI/testing/sysfs-driver-ufs | 126 +++++++++++++++++++++++++++++
1 file changed, 126 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-driver-ufs
b/Documentation/ABI/testing/sysfs-driver-ufs
index d1bc23c..8380866 100644
--- a/Documentation/ABI/testing/sysfs-driver-ufs
+++ b/Documentation/ABI/testing/sysfs-driver-ufs
@@ -995,6 +995,132 @@ Description: This entry shows the target state of an
UFS UIC link
The file is read only.
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_enable
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows the status of performance monitor enablement
+ and it can be used to start/stop the monitor. When the monitor
+ is stopped, the performance data collected is also cleared.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_chunk_size
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file tells the monitor to focus on requests transferring
+ data of specific chunk size (in Bytes). 0 means any chunk size.
+ It can only be changed when monitor is disabled.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_sectors
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows how many sectors (in 512 Bytes) have been
+ sent from device to host after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_busy
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows how long (in micro seconds) has been spent
+ sending data from device to host after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_nr_requests
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows how many read requests have been sent after
+ monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_max
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows the maximum latency (in micro seconds) of
+ read requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_min
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows the minimum latency (in micro seconds) of
+ read requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_avg
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows the average latency (in micro seconds) of
+ read requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_sum
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows the total latency (in micro seconds) of
+ read requests sent after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_sectors
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows how many sectors (in 512 Bytes) have been sent
+ from host to device after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_busy
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows how long (in micro seconds) has been spent
+ sending data from host to device after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_nr_requests
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows how many write requests have been sent after
+ monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_max
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows the maximum latency (in micro seconds) of write
+ requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_min
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows the minimum latency (in micro seconds) of write
+ requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_avg
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows the average latency (in micro seconds) of write
+ requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_sum
+Date: January 2021
+Contact: Can Guo <c...@codeaurora.org>
+Description: This file shows the total latency (in micro seconds) of write
+ requests after monitor gets started.
+
+ The file is read only.
+
What:
/sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_presv_us_en
Date: June 2020
Contact: Asutosh Das <asuto...@codeaurora.org>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux
Foundation Collaborative Project.
