From: Stephen Hemminger <shemminger@osdl.org>
Date: Mon, 27 Jun 2005 18:33:14 +0000 (-0700)
Subject: [PATCH] skge: handle Tx/Rx arbiter timeout
X-Git-Tag: v2.6.13-rc1~54
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=d25f5a6774c3c567b11f8637a787603a62d102b1;p=linux-2.6-omap-h63xx.git

[PATCH] skge: handle Tx/Rx arbiter timeout

Need to handle receive and transmit packet arbiter timeouts.
Transmit arbiter timeouts happens when Gigabit sends to 100Mbit port
on same switch and pause occurs.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
---

diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 290d6aa9238..9f24714260b 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -2731,6 +2731,24 @@ static irqreturn_t skge_intr(int irq, void *dev_id, struct pt_regs *regs)
 	if (status & IS_XA2_F)
 		skge_tx_intr(hw->dev[1]);
 
+	if (status & IS_PA_TO_RX1) {
+		struct skge_port *skge = netdev_priv(hw->dev[0]);
+		++skge->net_stats.rx_over_errors;
+		skge_write16(hw, B3_PA_CTRL, PA_CLR_TO_RX1);
+	}
+
+	if (status & IS_PA_TO_RX2) {
+		struct skge_port *skge = netdev_priv(hw->dev[1]);
+		++skge->net_stats.rx_over_errors;
+		skge_write16(hw, B3_PA_CTRL, PA_CLR_TO_RX2);
+	}
+
+	if (status & IS_PA_TO_TX1)
+		skge_write16(hw, B3_PA_CTRL, PA_CLR_TO_TX1);
+
+	if (status & IS_PA_TO_TX2)
+		skge_write16(hw, B3_PA_CTRL, PA_CLR_TO_TX2);
+
 	if (status & IS_MAC1)
 		skge_mac_intr(hw, 0);
 
diff --git a/drivers/net/skge.h b/drivers/net/skge.h
index ba6dfd2f01d..37323cd29e7 100644
--- a/drivers/net/skge.h
+++ b/drivers/net/skge.h
@@ -203,8 +203,11 @@ enum {
 	IS_XA2_F	= 1<<1,		/* Q_XA2 End of Frame */
 	IS_XA2_C	= 1<<0,		/* Q_XA2 Encoding Error */
 
-	IS_PORT_1	= IS_XA1_F| IS_R1_F| IS_MAC1,
-	IS_PORT_2	= IS_XA2_F| IS_R2_F| IS_MAC2,
+	IS_TO_PORT1	= IS_PA_TO_RX1 | IS_PA_TO_TX1,
+	IS_TO_PORT2	= IS_PA_TO_RX2 | IS_PA_TO_TX2,
+
+	IS_PORT_1	= IS_XA1_F| IS_R1_F | IS_TO_PORT1 | IS_MAC1,
+	IS_PORT_2	= IS_XA2_F| IS_R2_F | IS_TO_PORT2 | IS_MAC2,
 };