[OpenWrt-Devel] [PATCH v2 1/1] kernel: ar8xxx: get_arl_table now shows all ports of an entry

[Günther Kelleter]

Multicast ARL entries can have multiple destination ports. Get and dump
all destination ports of each entry, not just the lowest.

Signed-off-by: Günther Kelleter <guenther.kelleter at devolo.de>
---

Changes in v2:
- code readability
- commit message

 .../generic/files/drivers/net/phy/ar8216.c     | 18 ++++++++----------
 .../generic/files/drivers/net/phy/ar8216.h     |  3 ++-
 .../generic/files/drivers/net/phy/ar8327.c     | 10 ++--------
 .../generic/files/drivers/net/phy/ar8327.h     |  1 +
 4 files changed, 13 insertions(+), 19 deletions(-)

diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.c b/target/linux/generic/files/drivers/net/phy/ar8216.c
index 7512ee1b43..10ee037171 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8216.c
+++ b/target/linux/generic/files/drivers/net/phy/ar8216.c
@@ -749,7 +749,6 @@ static void ar8216_get_arl_entry(struct ar8xxx_priv *priv,
 	u16 r2, page;
 	u16 r1_func0, r1_func1, r1_func2;
 	u32 t, val0, val1, val2;
-	int i;
 
 	split_addr(AR8216_REG_ATU_FUNC0, &r1_func0, &r2, &page);
 	r2 |= 0x10;
@@ -785,12 +784,7 @@ static void ar8216_get_arl_entry(struct ar8xxx_priv *priv,
 		if (!*status)
 			break;
 
-		i = 0;
-		t = AR8216_ATU_PORT0;
-		while (!(val2 & t) && ++i < priv->dev.ports)
-			t <<= 1;
-
-		a->port = i;
+		a->portmap = (val2 & AR8216_ATU_PORTS) >> AR8216_ATU_PORTS_S;
 		a->mac[0] = (val0 & AR8216_ATU_ADDR5) >> AR8216_ATU_ADDR5_S;
 		a->mac[1] = (val0 & AR8216_ATU_ADDR4) >> AR8216_ATU_ADDR4_S;
 		a->mac[2] = (val1 & AR8216_ATU_ADDR3) >> AR8216_ATU_ADDR3_S;
@@ -1516,8 +1510,12 @@ ar8xxx_sw_get_arl_table(struct switch_dev *dev,
 		 */
 		for (j = 0; j < i; ++j) {
 			a1 = &priv->arl_table[j];
-			if (a->port == a1->port && !memcmp(a->mac, a1->mac, sizeof(a->mac)))
-				goto duplicate;
+			if (!memcmp(a->mac, a1->mac, sizeof(a->mac))) {
+				/* ignore ports already seen in former entry */
+				a->portmap &= ~a1->portmap;
+				if (!a->portmap)
+					goto duplicate;
+			}
 		}
 	}
 
@@ -1534,7 +1532,7 @@ ar8xxx_sw_get_arl_table(struct switch_dev *dev,
 	for (j = 0; j < priv->dev.ports; ++j) {
 		for (k = 0; k < i; ++k) {
 			a = &priv->arl_table[k];
-			if (a->port != j)
+			if (!(a->portmap & BIT(j)))
 				continue;
 			len += snprintf(buf + len, sizeof(priv->arl_buf) - len,
 					"Port %d: MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.h b/target/linux/generic/files/drivers/net/phy/ar8216.h
index ba0e0ddccd..509818c50d 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8216.h
+++ b/target/linux/generic/files/drivers/net/phy/ar8216.h
@@ -112,6 +112,7 @@
 
 #define AR8216_REG_ATU_FUNC2		0x0058
 #define   AR8216_ATU_PORTS		BITS(0, 6)
+#define   AR8216_ATU_PORTS_S		0
 #define   AR8216_ATU_PORT0		BIT(0)
 #define   AR8216_ATU_PORT1		BIT(1)
 #define   AR8216_ATU_PORT2		BIT(2)
@@ -367,7 +368,7 @@ enum arl_op {
 };
 
 struct arl_entry {
-	u8 port;
+	u16 portmap;
 	u8 mac[6];
 };
 
diff --git a/target/linux/generic/files/drivers/net/phy/ar8327.c b/target/linux/generic/files/drivers/net/phy/ar8327.c
index 74f0a08d76..803fb3d49f 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8327.c
+++ b/target/linux/generic/files/drivers/net/phy/ar8327.c
@@ -1057,8 +1057,7 @@ static void ar8327_get_arl_entry(struct ar8xxx_priv *priv,
 	struct mii_bus *bus = priv->mii_bus;
 	u16 r2, page;
 	u16 r1_data0, r1_data1, r1_data2, r1_func;
-	u32 t, val0, val1, val2;
-	int i;
+	u32 val0, val1, val2;
 
 	split_addr(AR8327_REG_ATU_DATA0, &r1_data0, &r2, &page);
 	r2 |= 0x10;
@@ -1095,12 +1094,7 @@ static void ar8327_get_arl_entry(struct ar8xxx_priv *priv,
 		if (!*status)
 			break;
 
-		i = 0;
-		t = AR8327_ATU_PORT0;
-		while (!(val1 & t) && ++i < AR8327_NUM_PORTS)
-			t <<= 1;
-
-		a->port = i;
+		a->portmap = (val1 & AR8327_ATU_PORTS) >> AR8327_ATU_PORTS_S;
 		a->mac[0] = (val0 & AR8327_ATU_ADDR0) >> AR8327_ATU_ADDR0_S;
 		a->mac[1] = (val0 & AR8327_ATU_ADDR1) >> AR8327_ATU_ADDR1_S;
 		a->mac[2] = (val0 & AR8327_ATU_ADDR2) >> AR8327_ATU_ADDR2_S;
diff --git a/target/linux/generic/files/drivers/net/phy/ar8327.h b/target/linux/generic/files/drivers/net/phy/ar8327.h
index d53ef885b1..38e33ea57e 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8327.h
+++ b/target/linux/generic/files/drivers/net/phy/ar8327.h
@@ -199,6 +199,7 @@
 #define   AR8327_ATU_ADDR5			BITS(8, 8)
 #define   AR8327_ATU_ADDR5_S			8
 #define   AR8327_ATU_PORTS			BITS(16, 7)
+#define   AR8327_ATU_PORTS_S			16
 #define   AR8327_ATU_PORT0			BIT(16)
 #define   AR8327_ATU_PORT1			BIT(17)
 #define   AR8327_ATU_PORT2			BIT(18)
-- 
2.19.1.121.g290adf8ac9


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