netdev - Re: [net PATCH v3] octeontx2-af: Unlock contexts in the queue context cache in case of fault detection

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Message-ID: <ZAdnT/D3PyjDxaK+@corigine.com>
Date:   Tue, 7 Mar 2023 17:33:19 +0100
From:   Simon Horman <simon.horman@...igine.com>
To:     Sai Krishna <saikrishnag@...vell.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, sgoutham@...vell.com,
        sumang@...vell.com, richardcochran@...il.com
Subject: Re: [net PATCH v3] octeontx2-af: Unlock contexts in the queue
 context cache in case of fault detection

On Tue, Mar 07, 2023 at 04:19:08PM +0530, Sai Krishna wrote:
> From: Suman Ghosh <sumang@...vell.com>
> 
> NDC caches contexts of frequently used queue's (Rx and Tx queues)
> contexts. Due to a HW errata when NDC detects fault/poision while
> accessing contexts it could go into an illegal state where a cache
> line could get locked forever. To makesure all cache lines in NDC
> are available for optimum performance upon fault/lockerror/posion
> errors scan through all cache lines in NDC and clear the lock bit.
> 
> Fixes: 4a3581cd5995 ("octeontx2-af: NPA AQ instruction enqueue support")
> Signed-off-by: Suman Ghosh <sumang@...vell.com>
> Signed-off-by: Sunil Kovvuri Goutham <sgoutham@...vell.com>
> Signed-off-by: Sai Krishna <saikrishnag@...vell.com>

Reviewed-by: Simon Horman <simon.horman@...igine.com>