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path: root/drivers/net/wimax/i2400m/netdev.c
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Diffstat (limited to 'drivers/net/wimax/i2400m/netdev.c')
-rw-r--r--drivers/net/wimax/i2400m/netdev.c127
1 files changed, 94 insertions, 33 deletions
diff --git a/drivers/net/wimax/i2400m/netdev.c b/drivers/net/wimax/i2400m/netdev.c
index 796396cb4c82..599aa4eb9baa 100644
--- a/drivers/net/wimax/i2400m/netdev.c
+++ b/drivers/net/wimax/i2400m/netdev.c
@@ -74,6 +74,7 @@
*/
#include <linux/if_arp.h>
#include <linux/netdevice.h>
+#include <linux/ethtool.h>
#include "i2400m.h"
@@ -88,7 +89,10 @@ enum {
* The MTU is 1400 or less
*/
I2400M_MAX_MTU = 1400,
- I2400M_TX_TIMEOUT = HZ,
+ /* 20 secs? yep, this is the maximum timeout that the device
+ * might take to get out of IDLE / negotiate it with the base
+ * station. We add 1sec for good measure. */
+ I2400M_TX_TIMEOUT = 21 * HZ,
I2400M_TX_QLEN = 5,
};
@@ -101,22 +105,19 @@ int i2400m_open(struct net_device *net_dev)
struct device *dev = i2400m_dev(i2400m);
d_fnstart(3, dev, "(net_dev %p [i2400m %p])\n", net_dev, i2400m);
- if (i2400m->ready == 0) {
- dev_err(dev, "Device is still initializing\n");
- result = -EBUSY;
- } else
+ /* Make sure we wait until init is complete... */
+ mutex_lock(&i2400m->init_mutex);
+ if (i2400m->updown)
result = 0;
+ else
+ result = -EBUSY;
+ mutex_unlock(&i2400m->init_mutex);
d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n",
net_dev, i2400m, result);
return result;
}
-/*
- *
- * On kernel versions where cancel_work_sync() didn't return anything,
- * we rely on wake_tx_skb() being non-NULL.
- */
static
int i2400m_stop(struct net_device *net_dev)
{
@@ -124,21 +125,7 @@ int i2400m_stop(struct net_device *net_dev)
struct device *dev = i2400m_dev(i2400m);
d_fnstart(3, dev, "(net_dev %p [i2400m %p])\n", net_dev, i2400m);
- /* See i2400m_hard_start_xmit(), references are taken there
- * and here we release them if the work was still
- * pending. Note we can't differentiate work not pending vs
- * never scheduled, so the NULL check does that. */
- if (cancel_work_sync(&i2400m->wake_tx_ws) == 0
- && i2400m->wake_tx_skb != NULL) {
- unsigned long flags;
- struct sk_buff *wake_tx_skb;
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- wake_tx_skb = i2400m->wake_tx_skb; /* compat help */
- i2400m->wake_tx_skb = NULL; /* compat help */
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- i2400m_put(i2400m);
- kfree_skb(wake_tx_skb);
- }
+ i2400m_net_wake_stop(i2400m);
d_fnend(3, dev, "(net_dev %p [i2400m %p]) = 0\n", net_dev, i2400m);
return 0;
}
@@ -167,6 +154,7 @@ void i2400m_wake_tx_work(struct work_struct *ws)
{
int result;
struct i2400m *i2400m = container_of(ws, struct i2400m, wake_tx_ws);
+ struct net_device *net_dev = i2400m->wimax_dev.net_dev;
struct device *dev = i2400m_dev(i2400m);
struct sk_buff *skb = i2400m->wake_tx_skb;
unsigned long flags;
@@ -182,27 +170,36 @@ void i2400m_wake_tx_work(struct work_struct *ws)
dev_err(dev, "WAKE&TX: skb dissapeared!\n");
goto out_put;
}
+ /* If we have, somehow, lost the connection after this was
+ * queued, don't do anything; this might be the device got
+ * reset or just disconnected. */
+ if (unlikely(!netif_carrier_ok(net_dev)))
+ goto out_kfree;
result = i2400m_cmd_exit_idle(i2400m);
if (result == -EILSEQ)
result = 0;
if (result < 0) {
dev_err(dev, "WAKE&TX: device didn't get out of idle: "
- "%d\n", result);
- goto error;
+ "%d - resetting\n", result);
+ i2400m_reset(i2400m, I2400M_RT_BUS);
+ goto error;
}
result = wait_event_timeout(i2400m->state_wq,
- i2400m->state != I2400M_SS_IDLE, 5 * HZ);
+ i2400m->state != I2400M_SS_IDLE,
+ net_dev->watchdog_timeo - HZ/2);
if (result == 0)
result = -ETIMEDOUT;
if (result < 0) {
dev_err(dev, "WAKE&TX: error waiting for device to exit IDLE: "
- "%d\n", result);
+ "%d - resetting\n", result);
+ i2400m_reset(i2400m, I2400M_RT_BUS);
goto error;
}
msleep(20); /* device still needs some time or it drops it */
result = i2400m_tx(i2400m, skb->data, skb->len, I2400M_PT_DATA);
- netif_wake_queue(i2400m->wimax_dev.net_dev);
error:
+ netif_wake_queue(net_dev);
+out_kfree:
kfree_skb(skb); /* refcount transferred by _hard_start_xmit() */
out_put:
i2400m_put(i2400m);
@@ -229,6 +226,38 @@ void i2400m_tx_prep_header(struct sk_buff *skb)
}
+
+/*
+ * Cleanup resources acquired during i2400m_net_wake_tx()
+ *
+ * This is called by __i2400m_dev_stop and means we have to make sure
+ * the workqueue is flushed from any pending work.
+ */
+void i2400m_net_wake_stop(struct i2400m *i2400m)
+{
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ /* See i2400m_hard_start_xmit(), references are taken there
+ * and here we release them if the work was still
+ * pending. Note we can't differentiate work not pending vs
+ * never scheduled, so the NULL check does that. */
+ if (cancel_work_sync(&i2400m->wake_tx_ws) == 0
+ && i2400m->wake_tx_skb != NULL) {
+ unsigned long flags;
+ struct sk_buff *wake_tx_skb;
+ spin_lock_irqsave(&i2400m->tx_lock, flags);
+ wake_tx_skb = i2400m->wake_tx_skb; /* compat help */
+ i2400m->wake_tx_skb = NULL; /* compat help */
+ spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+ i2400m_put(i2400m);
+ kfree_skb(wake_tx_skb);
+ }
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+ return;
+}
+
+
/*
* TX an skb to an idle device
*
@@ -342,6 +371,20 @@ netdev_tx_t i2400m_hard_start_xmit(struct sk_buff *skb,
int result;
d_fnstart(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
+ if (skb_header_cloned(skb)) {
+ /*
+ * Make tcpdump/wireshark happy -- if they are
+ * running, the skb is cloned and we will overwrite
+ * the mac fields in i2400m_tx_prep_header. Expand
+ * seems to fix this...
+ */
+ result = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+ if (result) {
+ result = NETDEV_TX_BUSY;
+ goto error_expand;
+ }
+ }
+
if (i2400m->state == I2400M_SS_IDLE)
result = i2400m_net_wake_tx(i2400m, net_dev, skb);
else
@@ -352,10 +395,11 @@ netdev_tx_t i2400m_hard_start_xmit(struct sk_buff *skb,
net_dev->stats.tx_packets++;
net_dev->stats.tx_bytes += skb->len;
}
+ result = NETDEV_TX_OK;
+error_expand:
kfree_skb(skb);
-
- d_fnend(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
- return NETDEV_TX_OK;
+ d_fnend(3, dev, "(skb %p net_dev %p) = %d\n", skb, net_dev, result);
+ return result;
}
@@ -559,6 +603,22 @@ static const struct net_device_ops i2400m_netdev_ops = {
.ndo_change_mtu = i2400m_change_mtu,
};
+static void i2400m_get_drvinfo(struct net_device *net_dev,
+ struct ethtool_drvinfo *info)
+{
+ struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
+
+ strncpy(info->driver, KBUILD_MODNAME, sizeof(info->driver) - 1);
+ strncpy(info->fw_version, i2400m->fw_name, sizeof(info->fw_version) - 1);
+ if (net_dev->dev.parent)
+ strncpy(info->bus_info, dev_name(net_dev->dev.parent),
+ sizeof(info->bus_info) - 1);
+}
+
+static const struct ethtool_ops i2400m_ethtool_ops = {
+ .get_drvinfo = i2400m_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+};
/**
* i2400m_netdev_setup - Setup setup @net_dev's i2400m private data
@@ -580,6 +640,7 @@ void i2400m_netdev_setup(struct net_device *net_dev)
& ~IFF_MULTICAST);
net_dev->watchdog_timeo = I2400M_TX_TIMEOUT;
net_dev->netdev_ops = &i2400m_netdev_ops;
+ net_dev->ethtool_ops = &i2400m_ethtool_ops;
d_fnend(3, NULL, "(net_dev %p) = void\n", net_dev);
}
EXPORT_SYMBOL_GPL(i2400m_netdev_setup);
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-11 02:17:04 +0000