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-rw-r--r--net/dsa/slave.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 5fc87ee..0010c69 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -18,6 +18,7 @@
#include <net/rtnetlink.h>
#include <net/switchdev.h>
#include <linux/if_bridge.h>
+#include <linux/netpoll.h>
#include "dsa_priv.h"
/* slave mii_bus handling ***************************************************/
@@ -418,6 +419,18 @@ static int dsa_slave_port_attr_get(struct net_device *dev,
return 0;
}
+static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
+ struct sk_buff *skb)
+{
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ if (p->netpoll)
+ netpoll_send_skb(p->netpoll, skb);
+#else
+ BUG();
+#endif
+ return NETDEV_TX_OK;
+}
+
static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
@@ -431,6 +444,12 @@ static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
if (!nskb)
return NETDEV_TX_OK;
+ /* SKB for netpoll still need to be mangled with the protocol-specific
+ * tag to be successfully transmitted
+ */
+ if (unlikely(netpoll_tx_running(dev)))
+ return dsa_netpoll_send_skb(p, nskb);
+
/* Queue the SKB for transmission on the parent interface, but
* do not modify its EtherType
*/
@@ -676,6 +695,49 @@ static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
return ret;
}
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static int dsa_slave_netpoll_setup(struct net_device *dev,
+ struct netpoll_info *ni)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+ struct net_device *master = ds->dst->master_netdev;
+ struct netpoll *netpoll;
+ int err = 0;
+
+ netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
+ if (!netpoll)
+ return -ENOMEM;
+
+ err = __netpoll_setup(netpoll, master);
+ if (err) {
+ kfree(netpoll);
+ goto out;
+ }
+
+ p->netpoll = netpoll;
+out:
+ return err;
+}
+
+static void dsa_slave_netpoll_cleanup(struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct netpoll *netpoll = p->netpoll;
+
+ if (!netpoll)
+ return;
+
+ p->netpoll = NULL;
+
+ __netpoll_free_async(netpoll);
+}
+
+static void dsa_slave_poll_controller(struct net_device *dev)
+{
+}
+#endif
+
static const struct ethtool_ops dsa_slave_ethtool_ops = {
.get_settings = dsa_slave_get_settings,
.set_settings = dsa_slave_set_settings,
@@ -708,6 +770,11 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
.ndo_fdb_dump = dsa_slave_fdb_dump,
.ndo_do_ioctl = dsa_slave_ioctl,
.ndo_get_iflink = dsa_slave_get_iflink,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_netpoll_setup = dsa_slave_netpoll_setup,
+ .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
+ .ndo_poll_controller = dsa_slave_poll_controller,
+#endif
};
static const struct switchdev_ops dsa_slave_switchdev_ops = {

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