netdev - [PATCH net-next v5 05/11] igc: Optimze TX buffer sizes for TSN

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Date:   Thu, 19 May 2022 18:15:32 -0700
From:   Vinicius Costa Gomes <vinicius.gomes@...el.com>
To:     netdev@...r.kernel.org
Cc:     Vinicius Costa Gomes <vinicius.gomes@...el.com>, jhs@...atatu.com,
        xiyou.wangcong@...il.com, jiri@...nulli.us, davem@...emloft.net,
        vladimir.oltean@....com, po.liu@....com, boon.leong.ong@...el.com,
        intel-wired-lan@...ts.osuosl.org
Subject: [PATCH net-next v5 05/11] igc: Optimze TX buffer sizes for TSN

There are 64KB buffer space shared for TX and RX (including the BMC).
We were only reserving 22KB for TX, increase each TX buffer (per
queue) by 2KB, the total is now 30KB for TX.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@...el.com>
---
 drivers/net/ethernet/intel/igc/igc_defines.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h
index f609b2dbbc28..62fff53254dd 100644
--- a/drivers/net/ethernet/intel/igc/igc_defines.h
+++ b/drivers/net/ethernet/intel/igc/igc_defines.h
@@ -395,7 +395,7 @@
 #define I225_TXPBSIZE_DEFAULT	0x04000014 /* TXPBSIZE default */
 #define IGC_RXPBS_CFG_TS_EN	0x80000000 /* Timestamp in Rx buffer */
 
-#define IGC_TXPBSIZE_TSN	0x04145145 /* 5k bytes buffer for each queue */
+#define IGC_TXPBSIZE_TSN	0x041c71c7 /* 7KB buffer for each queue + 2KB for BMC */
 #define IGC_RXPBSIZE_TSN	0x0000f08f /* 15KB for EXP + 15KB for BE + 2KB for BMC */
 #define IGC_RXPBSIZE_SIZE_MASK	0x0001FFFF
 
-- 
2.35.3