linux-kernel - [net-next PATCH v2 4/5] net: dsa: qca8k: move qca8xxx hol fixup to separate function

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Date:   Sat, 29 Jul 2023 13:55:08 +0200
From:   Christian Marangi <ansuelsmth@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Christian Marangi <ansuelsmth@...il.com>,
        Yang Yingliang <yangyingliang@...wei.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        Atin Bainada <hi@...nb.me>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [net-next PATCH v2 4/5] net: dsa: qca8k: move qca8xxx hol fixup to separate function

Move qca8xxx hol fixup to separate function to tidy things up and to
permit using a more efficent loop in future patch.

Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
 drivers/net/dsa/qca/qca8k-8xxx.c | 78 +++++++++++++++++---------------
 1 file changed, 42 insertions(+), 36 deletions(-)

diff --git a/drivers/net/dsa/qca/qca8k-8xxx.c b/drivers/net/dsa/qca/qca8k-8xxx.c
index 6286a64a2fe3..81c6fab0a01b 100644
--- a/drivers/net/dsa/qca/qca8k-8xxx.c
+++ b/drivers/net/dsa/qca/qca8k-8xxx.c
@@ -1756,6 +1756,46 @@ static int qca8k_connect_tag_protocol(struct dsa_switch *ds,
 	return 0;
 }
 
+static void qca8k_setup_hol_fixup(struct qca8k_priv *priv, int port)
+{
+	u32 mask;
+
+	switch (port) {
+	/* The 2 CPU port and port 5 requires some different
+	 * priority than any other ports.
+	 */
+	case 0:
+	case 5:
+	case 6:
+		mask = QCA8K_PORT_HOL_CTRL0_EG_PRI0(0x3) |
+			QCA8K_PORT_HOL_CTRL0_EG_PRI1(0x4) |
+			QCA8K_PORT_HOL_CTRL0_EG_PRI2(0x4) |
+			QCA8K_PORT_HOL_CTRL0_EG_PRI3(0x4) |
+			QCA8K_PORT_HOL_CTRL0_EG_PRI4(0x6) |
+			QCA8K_PORT_HOL_CTRL0_EG_PRI5(0x8) |
+			QCA8K_PORT_HOL_CTRL0_EG_PORT(0x1e);
+		break;
+	default:
+		mask = QCA8K_PORT_HOL_CTRL0_EG_PRI0(0x3) |
+			QCA8K_PORT_HOL_CTRL0_EG_PRI1(0x4) |
+			QCA8K_PORT_HOL_CTRL0_EG_PRI2(0x6) |
+			QCA8K_PORT_HOL_CTRL0_EG_PRI3(0x8) |
+			QCA8K_PORT_HOL_CTRL0_EG_PORT(0x19);
+	}
+	regmap_write(priv->regmap, QCA8K_REG_PORT_HOL_CTRL0(port), mask);
+
+	mask = QCA8K_PORT_HOL_CTRL1_ING(0x6) |
+	       QCA8K_PORT_HOL_CTRL1_EG_PRI_BUF_EN |
+	       QCA8K_PORT_HOL_CTRL1_EG_PORT_BUF_EN |
+	       QCA8K_PORT_HOL_CTRL1_WRED_EN;
+	regmap_update_bits(priv->regmap, QCA8K_REG_PORT_HOL_CTRL1(port),
+			   QCA8K_PORT_HOL_CTRL1_ING_BUF_MASK |
+			   QCA8K_PORT_HOL_CTRL1_EG_PRI_BUF_EN |
+			   QCA8K_PORT_HOL_CTRL1_EG_PORT_BUF_EN |
+			   QCA8K_PORT_HOL_CTRL1_WRED_EN,
+			   mask);
+}
+
 static int
 qca8k_setup(struct dsa_switch *ds)
 {
@@ -1895,42 +1935,8 @@ qca8k_setup(struct dsa_switch *ds)
 		 * missing settings to improve switch stability under load condition.
 		 * This problem is limited to qca8337 and other qca8k switch are not affected.
 		 */
-		if (priv->switch_id == QCA8K_ID_QCA8337) {
-			switch (i) {
-			/* The 2 CPU port and port 5 requires some different
-			 * priority than any other ports.
-			 */
-			case 0:
-			case 5:
-			case 6:
-				mask = QCA8K_PORT_HOL_CTRL0_EG_PRI0(0x3) |
-					QCA8K_PORT_HOL_CTRL0_EG_PRI1(0x4) |
-					QCA8K_PORT_HOL_CTRL0_EG_PRI2(0x4) |
-					QCA8K_PORT_HOL_CTRL0_EG_PRI3(0x4) |
-					QCA8K_PORT_HOL_CTRL0_EG_PRI4(0x6) |
-					QCA8K_PORT_HOL_CTRL0_EG_PRI5(0x8) |
-					QCA8K_PORT_HOL_CTRL0_EG_PORT(0x1e);
-				break;
-			default:
-				mask = QCA8K_PORT_HOL_CTRL0_EG_PRI0(0x3) |
-					QCA8K_PORT_HOL_CTRL0_EG_PRI1(0x4) |
-					QCA8K_PORT_HOL_CTRL0_EG_PRI2(0x6) |
-					QCA8K_PORT_HOL_CTRL0_EG_PRI3(0x8) |
-					QCA8K_PORT_HOL_CTRL0_EG_PORT(0x19);
-			}
-			qca8k_write(priv, QCA8K_REG_PORT_HOL_CTRL0(i), mask);
-
-			mask = QCA8K_PORT_HOL_CTRL1_ING(0x6) |
-			QCA8K_PORT_HOL_CTRL1_EG_PRI_BUF_EN |
-			QCA8K_PORT_HOL_CTRL1_EG_PORT_BUF_EN |
-			QCA8K_PORT_HOL_CTRL1_WRED_EN;
-			qca8k_rmw(priv, QCA8K_REG_PORT_HOL_CTRL1(i),
-				  QCA8K_PORT_HOL_CTRL1_ING_BUF_MASK |
-				  QCA8K_PORT_HOL_CTRL1_EG_PRI_BUF_EN |
-				  QCA8K_PORT_HOL_CTRL1_EG_PORT_BUF_EN |
-				  QCA8K_PORT_HOL_CTRL1_WRED_EN,
-				  mask);
-		}
+		if (priv->switch_id == QCA8K_ID_QCA8337)
+			qca8k_setup_hol_fixup(priv, i);
 	}
 
 	/* Special GLOBAL_FC_THRESH value are needed for ar8327 switch */
-- 
2.40.1