linux-kernel - [net PATCH 2/2] octeontx2-af: fix lbk link credits on cn10k

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Message-ID: <20230608114201.31112-3-naveenm@marvell.com>
Date:   Thu, 8 Jun 2023 17:12:01 +0530
From:   Naveen Mamindlapalli <naveenm@...vell.com>
To:     <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <sgoutham@...vell.com>
CC:     Nithin Dabilpuram <ndabilpuram@...vell.com>,
        Naveen Mamindlapalli <naveenm@...vell.com>
Subject: [net PATCH 2/2] octeontx2-af: fix lbk link credits on cn10k

From: Nithin Dabilpuram <ndabilpuram@...vell.com>

Fix LBK link credits on CN10K to be same as CN9K i.e
16 * MAX_LBK_DATA_RATE instead of current scheme of
calculation based on LBK buf length / FIFO size.

Fixes: 6e54e1c5399a ("octeontx2-af: cn10K: Add MTU configuration")
Signed-off-by: Nithin Dabilpuram <ndabilpuram@...vell.com>
Signed-off-by: Naveen Mamindlapalli <naveenm@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index 967370c0a649..cbb6d7e62d90 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -4067,10 +4067,6 @@ int rvu_mbox_handler_nix_set_rx_cfg(struct rvu *rvu, struct nix_rx_cfg *req,
 
 static u64 rvu_get_lbk_link_credits(struct rvu *rvu, u16 lbk_max_frs)
 {
-	/* CN10k supports 72KB FIFO size and max packet size of 64k */
-	if (rvu->hw->lbk_bufsize == 0x12000)
-		return (rvu->hw->lbk_bufsize - lbk_max_frs) / 16;
-
 	return 1600; /* 16 * max LBK datarate = 16 * 100Gbps */
 }
 
-- 
2.39.0.198.ga38d39a4c5