linux-kernel - Re: [PATCH] net: thunderx: Fix for Qset error due to CQ full

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Date:	Thu, 25 Feb 2016 16:25:48 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	sunil.kovvuri@...il.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, sgoutham@...ium.com,
	robert.richter@...iumnetworks.com, jerin.jacob@...iumnetworks.com
Subject: Re: [PATCH] net: thunderx: Fix for Qset error due to CQ full

From: sunil.kovvuri@...il.com
Date: Wed, 24 Feb 2016 16:40:50 +0530

> From: Sunil Goutham <sgoutham@...ium.com>
> 
> On Thunderx pass 1.x and pass2 due to a HW errata default CQ
> DROP_LEVEL of 0x80 is not sufficient to avoid CQ_WR_FULL Qset
> error when packets are being received at >20Mpps resulting in
> complete stall of packet reception.
> 
> This patch will configure it to 0x100 which is what is expected
> by HW on Thunderx. On future passes of thunderx and other chips
> HW default/reset value will be 0x100 or higher hence not overwritten.
> 
> Signed-off-by: Jerin Jacob <jerin.jacob@...iumnetworks.com>
> Signed-off-by: Sunil Goutham <sgoutham@...ium.com>

Applied, thank you.