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Date:   Thu, 22 Jun 2023 21:21:38 +0300
From:   Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To:     Damian Muszynski <damian.muszynski@intel.com>
Cc:     herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org,
        qat-linux@intel.com, Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Subject: Re: [PATCH v3 0/5] crypto: qat - add heartbeat feature
Message-ID: <ZJSRMgjqp+rqxTCO@smile.fi.intel.com>
References: <20230622180405.133298-1-damian.muszynski@intel.com>
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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.
> 
> Signed-off-by: Damian Muszynski <damian.muszynski@intel.com>

> Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

These tags are not for cover letter.

-- 
With Best Regards,
Andy Shevchenko