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Message-ID: <02b2a11c2990fdf21e8cd2c582df67d5883f6eea.camel@redhat.com>
Date: Tue, 18 Jul 2023 13:08:30 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: Geetha sowjanya <gakula@...vell.com>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: kuba@...nel.org, davem@...emloft.net, edumazet@...gle.com,
sgoutham@...vell.com, sbhatta@...vell.com, hkelam@...vell.com,
ndabilpuram@...vell.com
Subject: Re: [net PATCH] octeontx2-af: Adjust Tx credits when MCS external
bypass is disabled
On Sun, 2023-07-16 at 14:46 +0530, Geetha sowjanya wrote:
> From: Nithin Dabilpuram <ndabilpuram@...vell.com>
>
> When MCS external bypass is disabled, MCS returns additional
> 2 credits(32B) for every packet Tx'ed on LMAC. To account for
> these extra credits, NIX_AF_TX_LINKX_NORM_CREDIT.CC_MCS_CNT
> needs to be configured as otherwise NIX Tx credits would overflow
> and will never be returned to idle state credit count
> causing issues with credit control and MTU change.
>
> This patch fixes the same by configuring CC_MCS_CNT at probe
> time for MCS enabled SoC's
>
> Fixes: bd69476e86fc ("octeontx2-af: cn10k: mcs: Install a default TCAM for normal traffic")
> Signed-off-by: Nithin Dabilpuram <ndabilpuram@...vell.com>
> Signed-off-by: Geetha sowjanya <gakula@...vell.com>
> Signed-off-by: Sunil Goutham <sgoutham@...vell.com>
> ---
> drivers/net/ethernet/marvell/octeontx2/af/mbox.h | 2 +-
> drivers/net/ethernet/marvell/octeontx2/af/mcs.c | 12 ++++++++++++
> drivers/net/ethernet/marvell/octeontx2/af/mcs.h | 2 ++
> drivers/net/ethernet/marvell/octeontx2/af/rvu.h | 1 +
> drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 8 ++++++++
> 5 files changed, 24 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
> index eba307eee2b2..d78d72c0ca18 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
> @@ -1914,7 +1914,7 @@ struct mcs_hw_info {
> u8 tcam_entries; /* RX/TX Tcam entries per mcs block */
> u8 secy_entries; /* RX/TX SECY entries per mcs block */
> u8 sc_entries; /* RX/TX SC CAM entries per mcs block */
> - u8 sa_entries; /* PN table entries = SA entries */
> + u16 sa_entries; /* PN table entries = SA entries */
This chunk looks like an unrelated bug-fix. Please move it to a
separate patch or mention in the commit message why it's needed here.
Thanks!
Paolo
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