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authorLucas Segarra Fernandez <lucas.segarra.fernandez@intel.com>2023-10-04 12:09:20 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2023-10-13 18:31:07 +0800
commite079231676e05d6c88fba4585db1ac399a790b63 (patch)
tree19fd819d37132e24bea856c77610a81ed43727b6 /Documentation/ABI
parent756762decc604a5ac5c041f23dd447c5e691f459 (diff)
crypto: qat - add pm_status debugfs file
QAT devices implement a mechanism that allows them to go autonomously to a low power state depending on the load. Expose power management info by providing the "pm_status" file under debugfs. This includes PM state, PM event log, PM event counters, PM HW CSRs, per-resource type constrain counters and per-domain power gating status specific to the QAT device. This information is retrieved from (1) the FW by means of ICP_QAT_FW_PM_INFO command, (2) CSRs and (3) counters collected by the device driver. In addition, add logic to keep track and report power management event interrupts and acks/nacks sent to FW to allow/prevent state transitions. Signed-off-by: Lucas Segarra Fernandez <lucas.segarra.fernandez@intel.com> Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/debugfs-driver-qat9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/debugfs-driver-qat b/Documentation/ABI/testing/debugfs-driver-qat
index 3f9b4f708051..0656f27d1042 100644
--- a/Documentation/ABI/testing/debugfs-driver-qat
+++ b/Documentation/ABI/testing/debugfs-driver-qat
@@ -59,3 +59,12 @@ Description: (RO) Read returns the device health status.
The driver does not monitor for Heartbeat. It is left for a user
to poll the status periodically.
+
+What: /sys/kernel/debug/qat_<device>_<BDF>/pm_status
+Date: January 2024
+KernelVersion: 6.7
+Contact: qat-linux@intel.com
+Description: (RO) Read returns power management information specific to the
+ QAT device.
+
+ This attribute is only available for qat_4xxx devices.