linux-kernel - [net-next PATCH v3 1/2] net: dsa: qca8k: add QCA8K_ATU_TABLE

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Date:   Wed, 25 Jan 2023 21:35:16 +0100
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>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [net-next PATCH v3 1/2] net: dsa: qca8k: add QCA8K_ATU_TABLE_SIZE define for fdb access

Add and use QCA8K_ATU_TABLE_SIZE instead of hardcoding the ATU size with
a pure number and using sizeof on the array.

Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---

v3:
- Add patch

 drivers/net/dsa/qca/qca8k-common.c | 10 ++++++----
 drivers/net/dsa/qca/qca8k.h        |  2 ++
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/dsa/qca/qca8k-common.c b/drivers/net/dsa/qca/qca8k-common.c
index fb45b598847b..2f82a8dae9ff 100644
--- a/drivers/net/dsa/qca/qca8k-common.c
+++ b/drivers/net/dsa/qca/qca8k-common.c
@@ -150,11 +150,12 @@ static int qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
 
 static int qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
 {
-	u32 reg[3];
+	u32 reg[QCA8K_ATU_TABLE_SIZE];
 	int ret;
 
 	/* load the ARL table into an array */
-	ret = qca8k_bulk_read(priv, QCA8K_REG_ATU_DATA0, reg, sizeof(reg));
+	ret = qca8k_bulk_read(priv, QCA8K_REG_ATU_DATA0, reg,
+			      QCA8K_ATU_TABLE_SIZE * sizeof(u32));
 	if (ret)
 		return ret;
 
@@ -178,7 +179,7 @@ static int qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
 static void qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask,
 			    const u8 *mac, u8 aging)
 {
-	u32 reg[3] = { 0 };
+	u32 reg[QCA8K_ATU_TABLE_SIZE] = { 0 };
 
 	/* vid - 83:72 */
 	reg[2] = FIELD_PREP(QCA8K_ATU_VID_MASK, vid);
@@ -195,7 +196,8 @@ static void qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask,
 	reg[0] |= FIELD_PREP(QCA8K_ATU_ADDR5_MASK, mac[5]);
 
 	/* load the array into the ARL table */
-	qca8k_bulk_write(priv, QCA8K_REG_ATU_DATA0, reg, sizeof(reg));
+	qca8k_bulk_write(priv, QCA8K_REG_ATU_DATA0, reg,
+			 QCA8K_ATU_TABLE_SIZE * sizeof(u32));
 }
 
 static int qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd,
diff --git a/drivers/net/dsa/qca/qca8k.h b/drivers/net/dsa/qca/qca8k.h
index 03514f7a20be..593a882ec43c 100644
--- a/drivers/net/dsa/qca/qca8k.h
+++ b/drivers/net/dsa/qca/qca8k.h
@@ -148,6 +148,8 @@
 #define QCA8K_REG_IPV4_PRI_ADDR_MASK			0x474
 
 /* Lookup registers */
+#define QCA8K_ATU_TABLE_SIZE				3 /* 12 bytes wide table / sizeof(u32) */
+
 #define QCA8K_REG_ATU_DATA0				0x600
 #define   QCA8K_ATU_ADDR2_MASK				GENMASK(31, 24)
 #define   QCA8K_ATU_ADDR3_MASK				GENMASK(23, 16)
-- 
2.38.1