On Thu, Jun 22, 2023 at 08:04:01PM +0200, Damian Muszynski wrote: > This set introduces support for the QAT heartbeat feature. It allows > detection whenever device firmware or acceleration unit will hang. > We're adding this feature to allow our clients having a tool with > they could verify if all of the Quick Assist hardware resources are > healthy and operational. > > QAT device firmware periodically writes counters to a specified physical > memory location. A pair of counters per thread is incremented at > the start and end of the main processing loop within the firmware. > Checking for Heartbeat consists of checking the validity of the pair > of counter values for each thread. Stagnant counters indicate > a firmware hang. > > The first patch adds timestamp synchronization to the firmware. > The second patch removes historical and never used HB definitions. > Patch no. 3 is implementing the hardware clock frequency measuring > interface. > The fourth introduces the main heartbeat implementation with the debugfs > interface. > The last patch implements an algorithm that allows the code to detect > which version of heartbeat API is used at the currently loaded firmware. I made a few last minute nit-picks, feel free to ignore them if it's okay with the maintainers. -- With Best Regards, Andy Shevchenko
