[WAN]: converting generic HDLC to use netif_dormant*()
This patch converts generic HDLC (and WAN drivers using it) from
hdlc_set_carrier() to netif_dormant*() interface.
WAN hardware drivers should now use netif_carrier_on|off() like
other network drivers.
Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wan/c101.c b/drivers/net/wan/c101.c
index c92ac9f..2c09ec9 100644
--- a/drivers/net/wan/c101.c
+++ b/drivers/net/wan/c101.c
@@ -116,27 +116,33 @@
#include "hd6457x.c"
+static inline void set_carrier(port_t *port)
+{
+ if (!sca_in(MSCI1_OFFSET + ST3, port) & ST3_DCD)
+ netif_carrier_on(port_to_dev(port));
+ else
+ netif_carrier_off(port_to_dev(port));
+}
+
+
static void sca_msci_intr(port_t *port)
{
- struct net_device *dev = port_to_dev(port);
- card_t* card = port_to_card(port);
- u8 stat = sca_in(MSCI1_OFFSET + ST1, card); /* read MSCI ST1 status */
+ u8 stat = sca_in(MSCI1_OFFSET + ST1, port); /* read MSCI ST1 status */
/* Reset MSCI TX underrun status bit */
- sca_out(stat & ST1_UDRN, MSCI0_OFFSET + ST1, card);
+ sca_out(stat & ST1_UDRN, MSCI0_OFFSET + ST1, port);
if (stat & ST1_UDRN) {
- struct net_device_stats *stats = hdlc_stats(dev);
+ struct net_device_stats *stats = hdlc_stats(port_to_dev(port));
stats->tx_errors++; /* TX Underrun error detected */
stats->tx_fifo_errors++;
}
/* Reset MSCI CDCD status bit - uses ch#2 DCD input */
- sca_out(stat & ST1_CDCD, MSCI1_OFFSET + ST1, card);
+ sca_out(stat & ST1_CDCD, MSCI1_OFFSET + ST1, port);
if (stat & ST1_CDCD)
- hdlc_set_carrier(!(sca_in(MSCI1_OFFSET + ST3, card) & ST3_DCD),
- dev);
+ set_carrier(port);
}
@@ -190,7 +196,7 @@
sca_out(IE1_UDRN, MSCI0_OFFSET + IE1, port);
sca_out(IE0_TXINT, MSCI0_OFFSET + IE0, port);
- hdlc_set_carrier(!(sca_in(MSCI1_OFFSET + ST3, port) & ST3_DCD), dev);
+ set_carrier(port);
printk(KERN_DEBUG "0x%X\n", sca_in(MSCI1_OFFSET + ST3, port));
/* enable MSCI1 CDCD interrupt */
@@ -378,7 +384,7 @@
}
sca_init_sync_port(card); /* Set up C101 memory */
- hdlc_set_carrier(!(sca_in(MSCI1_OFFSET + ST3, card) & ST3_DCD), dev);
+ set_carrier(card);
printk(KERN_INFO "%s: Moxa C101 on IRQ%u,"
" using %u TX + %u RX packets rings\n",
diff --git a/drivers/net/wan/hd6457x.c b/drivers/net/wan/hd6457x.c
index d374332..dce2bb3 100644
--- a/drivers/net/wan/hd6457x.c
+++ b/drivers/net/wan/hd6457x.c
@@ -168,6 +168,23 @@
}
+static inline void sca_set_carrier(port_t *port)
+{
+ if (!(sca_in(get_msci(port) + ST3, port_to_card(port)) & ST3_DCD)) {
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: sca_set_carrier on\n",
+ port_to_dev(port)->name);
+#endif
+ netif_carrier_on(port_to_dev(port));
+ } else {
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: sca_set_carrier off\n",
+ port_to_dev(port)->name);
+#endif
+ netif_carrier_off(port_to_dev(port));
+ }
+}
+
static void sca_init_sync_port(port_t *port)
{
@@ -237,9 +254,7 @@
sca_out(DIR_BOFE, DIR_TX(phy_node(port)), card);
}
}
-
- hdlc_set_carrier(!(sca_in(get_msci(port) + ST3, card) & ST3_DCD),
- port_to_dev(port));
+ sca_set_carrier(port);
}
@@ -262,8 +277,7 @@
}
if (stat & ST1_CDCD)
- hdlc_set_carrier(!(sca_in(msci + ST3, card) & ST3_DCD),
- port_to_dev(port));
+ sca_set_carrier(port);
}
#endif
@@ -566,7 +580,7 @@
- all DMA interrupts
*/
- hdlc_set_carrier(!(sca_in(msci + ST3, card) & ST3_DCD), dev);
+ sca_set_carrier(port);
#ifdef __HD64570_H
/* MSCI TX INT and RX INT A IRQ enable */
diff --git a/drivers/net/wan/hdlc_cisco.c b/drivers/net/wan/hdlc_cisco.c
index 1fd0466..f289dab 100644
--- a/drivers/net/wan/hdlc_cisco.c
+++ b/drivers/net/wan/hdlc_cisco.c
@@ -192,9 +192,7 @@
"uptime %ud%uh%um%us)\n",
dev->name, days, hrs,
min, sec);
-#if 0
- netif_carrier_on(dev);
-#endif
+ netif_dormant_off(dev);
hdlc->state.cisco.up = 1;
}
}
@@ -227,9 +225,7 @@
hdlc->state.cisco.settings.timeout * HZ)) {
hdlc->state.cisco.up = 0;
printk(KERN_INFO "%s: Link down\n", dev->name);
-#if 0
- netif_carrier_off(dev);
-#endif
+ netif_dormant_on(dev);
}
cisco_keepalive_send(dev, CISCO_KEEPALIVE_REQ,
@@ -265,10 +261,7 @@
{
hdlc_device *hdlc = dev_to_hdlc(dev);
del_timer_sync(&hdlc->state.cisco.timer);
-#if 0
- if (netif_carrier_ok(dev))
- netif_carrier_off(dev);
-#endif
+ netif_dormant_on(dev);
hdlc->state.cisco.up = 0;
hdlc->state.cisco.request_sent = 0;
}
@@ -328,6 +321,7 @@
dev->type = ARPHRD_CISCO;
dev->flags = IFF_POINTOPOINT | IFF_NOARP;
dev->addr_len = 0;
+ netif_dormant_on(dev);
return 0;
}
diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c
index 523afe1..7bb737b 100644
--- a/drivers/net/wan/hdlc_fr.c
+++ b/drivers/net/wan/hdlc_fr.c
@@ -301,7 +301,7 @@
if (pvc->open_count++ == 0) {
hdlc_device *hdlc = dev_to_hdlc(pvc->master);
if (hdlc->state.fr.settings.lmi == LMI_NONE)
- pvc->state.active = hdlc->carrier;
+ pvc->state.active = netif_carrier_ok(pvc->master);
pvc_carrier(pvc->state.active, pvc);
hdlc->state.fr.dce_changed = 1;
@@ -545,11 +545,7 @@
hdlc->state.fr.reliable = reliable;
if (reliable) {
-#if 0
- if (!netif_carrier_ok(dev))
- netif_carrier_on(dev);
-#endif
-
+ netif_dormant_off(dev);
hdlc->state.fr.n391cnt = 0; /* Request full status */
hdlc->state.fr.dce_changed = 1;
@@ -562,11 +558,7 @@
}
}
} else {
-#if 0
- if (netif_carrier_ok(dev))
- netif_carrier_off(dev);
-#endif
-
+ netif_dormant_on(dev);
while (pvc) { /* Deactivate all PVCs */
pvc_carrier(0, pvc);
pvc->state.exist = pvc->state.active = 0;
diff --git a/drivers/net/wan/hdlc_generic.c b/drivers/net/wan/hdlc_generic.c
index b7da551..04ca1f7 100644
--- a/drivers/net/wan/hdlc_generic.c
+++ b/drivers/net/wan/hdlc_generic.c
@@ -34,10 +34,11 @@
#include <linux/inetdevice.h>
#include <linux/lapb.h>
#include <linux/rtnetlink.h>
+#include <linux/notifier.h>
#include <linux/hdlc.h>
-static const char* version = "HDLC support module revision 1.18";
+static const char* version = "HDLC support module revision 1.19";
#undef DEBUG_LINK
@@ -73,57 +74,51 @@
-static void __hdlc_set_carrier_on(struct net_device *dev)
+static inline void hdlc_proto_start(struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
if (hdlc->proto.start)
return hdlc->proto.start(dev);
-#if 0
-#ifdef DEBUG_LINK
- if (netif_carrier_ok(dev))
- printk(KERN_ERR "hdlc_set_carrier_on(): already on\n");
-#endif
- netif_carrier_on(dev);
-#endif
}
-static void __hdlc_set_carrier_off(struct net_device *dev)
+static inline void hdlc_proto_stop(struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
if (hdlc->proto.stop)
return hdlc->proto.stop(dev);
-
-#if 0
-#ifdef DEBUG_LINK
- if (!netif_carrier_ok(dev))
- printk(KERN_ERR "hdlc_set_carrier_off(): already off\n");
-#endif
- netif_carrier_off(dev);
-#endif
}
-void hdlc_set_carrier(int on, struct net_device *dev)
+static int hdlc_device_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
{
- hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct net_device *dev = ptr;
+ hdlc_device *hdlc;
unsigned long flags;
- on = on ? 1 : 0;
+ int on;
+
+ if (dev->get_stats != hdlc_get_stats)
+ return NOTIFY_DONE; /* not an HDLC device */
+
+ if (event != NETDEV_CHANGE)
+ return NOTIFY_DONE; /* Only interrested in carrier changes */
+
+ on = netif_carrier_ok(dev);
#ifdef DEBUG_LINK
- printk(KERN_DEBUG "hdlc_set_carrier %i\n", on);
+ printk(KERN_DEBUG "%s: hdlc_device_event NETDEV_CHANGE, carrier %i\n",
+ dev->name, on);
#endif
+ hdlc = dev_to_hdlc(dev);
spin_lock_irqsave(&hdlc->state_lock, flags);
if (hdlc->carrier == on)
goto carrier_exit; /* no change in DCD line level */
-#ifdef DEBUG_LINK
- printk(KERN_INFO "%s: carrier %s\n", dev->name, on ? "ON" : "off");
-#endif
hdlc->carrier = on;
if (!hdlc->open)
@@ -131,14 +126,15 @@
if (hdlc->carrier) {
printk(KERN_INFO "%s: Carrier detected\n", dev->name);
- __hdlc_set_carrier_on(dev);
+ hdlc_proto_start(dev);
} else {
printk(KERN_INFO "%s: Carrier lost\n", dev->name);
- __hdlc_set_carrier_off(dev);
+ hdlc_proto_stop(dev);
}
carrier_exit:
spin_unlock_irqrestore(&hdlc->state_lock, flags);
+ return NOTIFY_DONE;
}
@@ -165,7 +161,7 @@
if (hdlc->carrier) {
printk(KERN_INFO "%s: Carrier detected\n", dev->name);
- __hdlc_set_carrier_on(dev);
+ hdlc_proto_start(dev);
} else
printk(KERN_INFO "%s: No carrier\n", dev->name);
@@ -190,7 +186,7 @@
hdlc->open = 0;
if (hdlc->carrier)
- __hdlc_set_carrier_off(dev);
+ hdlc_proto_stop(dev);
spin_unlock_irq(&hdlc->state_lock);
@@ -303,7 +299,6 @@
EXPORT_SYMBOL(hdlc_open);
EXPORT_SYMBOL(hdlc_close);
-EXPORT_SYMBOL(hdlc_set_carrier);
EXPORT_SYMBOL(hdlc_ioctl);
EXPORT_SYMBOL(hdlc_setup);
EXPORT_SYMBOL(alloc_hdlcdev);
@@ -315,9 +310,18 @@
};
+static struct notifier_block hdlc_notifier = {
+ .notifier_call = hdlc_device_event,
+};
+
+
static int __init hdlc_module_init(void)
{
+ int result;
+
printk(KERN_INFO "%s\n", version);
+ if ((result = register_netdevice_notifier(&hdlc_notifier)) != 0)
+ return result;
dev_add_pack(&hdlc_packet_type);
return 0;
}
@@ -327,6 +331,7 @@
static void __exit hdlc_module_exit(void)
{
dev_remove_pack(&hdlc_packet_type);
+ unregister_netdevice_notifier(&hdlc_notifier);
}
diff --git a/drivers/net/wan/wanxl.c b/drivers/net/wan/wanxl.c
index d564224..b2031df 100644
--- a/drivers/net/wan/wanxl.c
+++ b/drivers/net/wan/wanxl.c
@@ -149,7 +149,10 @@
printk(KERN_INFO "%s: %s%s module, %s cable%s%s\n",
port->dev->name, pm, dte, cable, dsr, dcd);
- hdlc_set_carrier(value & STATUS_CABLE_DCD, port->dev);
+ if (value & STATUS_CABLE_DCD)
+ netif_carrier_on(port->dev);
+ else
+ netif_carrier_off(port->dev);
}
diff --git a/include/linux/hdlc.h b/include/linux/hdlc.h
index 4513f9e..d5ebbb2 100644
--- a/include/linux/hdlc.h
+++ b/include/linux/hdlc.h
@@ -224,8 +224,6 @@
int hdlc_open(struct net_device *dev);
/* Must be called by hardware driver when HDLC device is being closed */
void hdlc_close(struct net_device *dev);
-/* Called by hardware driver when DCD line level changes */
-void hdlc_set_carrier(int on, struct net_device *dev);
/* May be used by hardware driver to gain control over HDLC device */
static __inline__ void hdlc_proto_detach(hdlc_device *hdlc)