netdev - [PATCH net-next 2/4] net: stmmac: socfpga: Enable TBS support for Agilex5

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Message-Id: <20251029-agilex5_ext-v1-2-1931132d77d6@altera.com>
Date: Wed, 29 Oct 2025 16:06:14 +0800
From: Rohan G Thomas via B4 Relay <devnull+rohan.g.thomas.altera.com@...nel.org>
To: Maxime Chevallier <maxime.chevallier@...tlin.com>, 
 Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>, 
 Richard Cochran <richardcochran@...il.com>, 
 Steffen Trumtrar <s.trumtrar@...gutronix.de>
Cc: netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Rohan G Thomas <rohan.g.thomas@...era.com>
Subject: [PATCH net-next 2/4] net: stmmac: socfpga: Enable TBS support for
 Agilex5

From: Rohan G Thomas <rohan.g.thomas@...era.com>

Agilex5 supports Time-Based Scheduling(TBS) for Tx queue 6 and Tx
queue 7. This commit enables TBS support for these queues.

Signed-off-by: Rohan G Thomas <rohan.g.thomas@...era.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 3dae4f3c103802ed1c2cd390634bd5473192d4ee..c02e6fa715bbea2f703bcdeee9d7a41be51ce91c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -473,6 +473,19 @@ static void socfpga_agilex5_setup_plat_dat(struct socfpga_dwmac *dwmac)
 	socfpga_common_plat_dat(dwmac);

 	plat_dat->core_type = DWMAC_CORE_XGMAC;
+
+	/* Enable TBS */
+	switch (plat_dat->tx_queues_to_use) {
+	case 8:
+		plat_dat->tx_queues_cfg[7].tbs_en = true;
+		fallthrough;
+	case 7:
+		plat_dat->tx_queues_cfg[6].tbs_en = true;
+		break;
+	default:
+		/* Tx Queues 0 - 5 doesn't support TBS on Agilex5 */
+		break;
+	}
 }

 static int socfpga_dwmac_probe(struct platform_device *pdev)

-- 
2.43.7