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Date: Sat, 19 Jul 2008 14:49:52 +0200
From: Lennert Buytenhek <buytenh@...tstofly.org>
To: netdev@...r.kernel.org
Subject: [PATCH 2/2] mv643xx_eth: print message on link status change
When there is a link status change (link or phy status interrupt),
print a message notifying the user of the new link status.
Signed-off-by: Lennert Buytenhek <buytenh@...vell.com>
Index: linux-2.6.26/drivers/net/mv643xx_eth.c
===================================================================
--- linux-2.6.26.orig/drivers/net/mv643xx_eth.c
+++ linux-2.6.26/drivers/net/mv643xx_eth.c
@@ -91,6 +91,12 @@ static char mv643xx_eth_driver_version[]
#define PORT_STATUS(p) (0x0444 + ((p) << 10))
#define TX_FIFO_EMPTY 0x00000400
#define TX_IN_PROGRESS 0x00000080
+#define PORT_SPEED_MASK 0x00000030
+#define PORT_SPEED_1000 0x00000010
+#define PORT_SPEED_100 0x00000020
+#define PORT_SPEED_10 0x00000000
+#define FLOW_CONTROL_ENABLED 0x00000008
+#define FULL_DUPLEX 0x00000004
#define LINK_UP 0x00000002
#define TXQ_COMMAND(p) (0x0448 + ((p) << 10))
#define TXQ_FIX_PRIO_CONF(p) (0x044c + ((p) << 10))
@@ -1679,6 +1685,64 @@ static void txq_deinit(struct tx_queue *
/* netdev ops and related ***************************************************/
+static void handle_link_event(struct mv643xx_eth_private *mp)
+{
+ struct net_device *dev = mp->dev;
+ u32 port_status;
+ int speed;
+ int duplex;
+ int fc;
+
+ port_status = rdl(mp, PORT_STATUS(mp->port_num));
+ if (!(port_status & LINK_UP)) {
+ if (netif_carrier_ok(dev)) {
+ int i;
+
+ printk(KERN_INFO "%s: link down\n", dev->name);
+
+ netif_carrier_off(dev);
+ netif_stop_queue(dev);
+
+ for (i = 0; i < 8; i++) {
+ struct tx_queue *txq = mp->txq + i;
+
+ if (mp->txq_mask & (1 << i)) {
+ txq_reclaim(txq, 1);
+ txq_reset_hw_ptr(txq);
+ }
+ }
+ }
+ return;
+ }
+
+ switch (port_status & PORT_SPEED_MASK) {
+ case PORT_SPEED_10:
+ speed = 10;
+ break;
+ case PORT_SPEED_100:
+ speed = 100;
+ break;
+ case PORT_SPEED_1000:
+ speed = 1000;
+ break;
+ default:
+ speed = -1;
+ break;
+ }
+ duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
+ fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
+
+ printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, "
+ "flow control %sabled\n", dev->name,
+ speed, duplex ? "full" : "half",
+ fc ? "en" : "dis");
+
+ if (!netif_carrier_ok(dev)) {
+ netif_carrier_on(dev);
+ netif_wake_queue(dev);
+ }
+}
+
static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
@@ -1698,28 +1762,8 @@ static irqreturn_t mv643xx_eth_irq(int i
wrl(mp, INT_CAUSE_EXT(mp->port_num), ~int_cause_ext);
}
- if (int_cause_ext & (INT_EXT_PHY | INT_EXT_LINK)) {
- if (rdl(mp, PORT_STATUS(mp->port_num)) & LINK_UP) {
- if (!netif_carrier_ok(dev)) {
- netif_carrier_on(dev);
- netif_wake_queue(dev);
- }
- } else if (netif_carrier_ok(dev)) {
- int i;
-
- netif_stop_queue(dev);
- netif_carrier_off(dev);
-
- for (i = 0; i < 8; i++) {
- struct tx_queue *txq = mp->txq + i;
-
- if (mp->txq_mask & (1 << i)) {
- txq_reclaim(txq, 1);
- txq_reset_hw_ptr(txq);
- }
- }
- }
- }
+ if (int_cause_ext & (INT_EXT_PHY | INT_EXT_LINK))
+ handle_link_event(mp);
/*
* RxBuffer or RxError set for any of the 8 queues?
@@ -1970,6 +2014,9 @@ static int mv643xx_eth_open(struct net_d
napi_enable(&mp->napi);
#endif
+ netif_carrier_off(dev);
+ netif_stop_queue(dev);
+
port_start(mp);
set_rx_coal(mp, 0);
--
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