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Date: Wed, 30 Nov 2011 17:27:09 +0300
From: Alexander Smirnov <alex.bluesman.smirnov@...il.com>
To: dbaryshkov@...il.com
Cc: linux-zigbee-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
davem@...emloft.net,
Alexander Smirnov <alex.bluesman.smirnov@...il.com>
Subject: [PATCH 10/12] [MAC802154] mac802154: bind network iface to phy
Transciever slaves manipulation. Each slave represents network interface
in user space and is described by net_device structure. One transciever
may support several slaves and be connected to several networks at the
same time.
Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@...il.com>
---
net/mac802154/ieee802154_dev.c | 147 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 147 insertions(+), 0 deletions(-)
diff --git a/net/mac802154/ieee802154_dev.c b/net/mac802154/ieee802154_dev.c
index e90d336..8fe1a9b 100644
--- a/net/mac802154/ieee802154_dev.c
+++ b/net/mac802154/ieee802154_dev.c
@@ -18,12 +18,143 @@
#include <linux/kernel.h>
#include <linux/netdevice.h>
+#include <linux/nl802154.h>
#include <net/route.h>
#include <net/mac802154.h>
#include <net/wpan-phy.h>
#include "mac802154.h"
+#include "mib.h"
+
+int mac802154_slave_open(struct net_device *dev)
+{
+ struct mac802154_sub_if_data *priv = netdev_priv(dev);
+ int res = 0;
+
+ if (priv->hw->open_count++ == 0) {
+ res = priv->hw->ops->start(&priv->hw->hw);
+ WARN_ON(res);
+ if (res)
+ goto err;
+ }
+
+ if (priv->hw->ops->ieee_addr) {
+ res = priv->hw->ops->ieee_addr(&priv->hw->hw, dev->dev_addr);
+ WARN_ON(res);
+ if (res)
+ goto err;
+ mac802154_dev_set_ieee_addr(dev);
+ }
+
+ netif_start_queue(dev);
+ return 0;
+err:
+ priv->hw->open_count--;
+
+ return res;
+}
+
+int mac802154_slave_close(struct net_device *dev)
+{
+ struct mac802154_sub_if_data *priv = netdev_priv(dev);
+
+ dev->priv_flags &= ~IFF_IEEE802154_COORD;
+
+ netif_stop_queue(dev);
+
+ if ((--priv->hw->open_count) == 0)
+ priv->hw->ops->stop(&priv->hw->hw);
+
+ return 0;
+}
+
+static int mac802154_netdev_register(struct wpan_phy *phy,
+ struct net_device *dev)
+{
+ struct mac802154_sub_if_data *priv;
+ struct mac802154_priv *ipriv;
+ int err;
+
+ ipriv = wpan_phy_priv(phy);
+
+ priv = netdev_priv(dev);
+ priv->dev = dev;
+ priv->hw = ipriv;
+
+ dev->needed_headroom = ipriv->hw.extra_tx_headroom;
+
+ SET_NETDEV_DEV(dev, &ipriv->phy->dev);
+
+ mutex_lock(&ipriv->slaves_mtx);
+ if (!ipriv->running) {
+ mutex_unlock(&ipriv->slaves_mtx);
+ return -ENODEV;
+ }
+ mutex_unlock(&ipriv->slaves_mtx);
+
+ err = register_netdev(dev);
+ if (err < 0)
+ return err;
+
+ rtnl_lock();
+ mutex_lock(&ipriv->slaves_mtx);
+ list_add_tail_rcu(&priv->list, &ipriv->slaves);
+ mutex_unlock(&ipriv->slaves_mtx);
+ rtnl_unlock();
+
+ return 0;
+}
+
+static void mac802154_del_iface(struct wpan_phy *phy,
+ struct net_device *dev)
+{
+ struct mac802154_sub_if_data *sdata;
+ ASSERT_RTNL();
+
+ sdata = netdev_priv(dev);
+
+ BUG_ON(sdata->hw->phy != phy);
+
+ mutex_lock(&sdata->hw->slaves_mtx);
+ list_del_rcu(&sdata->list);
+ mutex_unlock(&sdata->hw->slaves_mtx);
+
+ synchronize_rcu();
+ unregister_netdevice(sdata->dev);
+}
+
+static struct net_device *mac802154_add_iface(struct wpan_phy *phy,
+ const char *name, int type)
+{
+ struct net_device *dev;
+ int err = -ENOMEM;
+
+ /* No devices is currently supported */
+ switch (type) {
+ default:
+ dev = NULL;
+ err = -EINVAL;
+ break;
+ }
+ if (!dev)
+ goto err;
+
+
+ err = mac802154_netdev_register(phy, dev);
+
+ if (err)
+ goto err_free;
+
+ dev_hold(dev); /* we return a device w/ incremented refcount */
+ return dev;
+
+err_free:
+ free_netdev(dev);
+err:
+ return ERR_PTR(err);
+}
+
struct ieee802154_dev *ieee802154_alloc_device(size_t priv_size,
struct ieee802154_ops *ops)
@@ -61,6 +192,8 @@ void ieee802154_free_device(struct ieee802154_dev *hw)
{
struct mac802154_priv *priv = mac802154_to_priv(hw);
+ BUG_ON(!list_empty(&priv->slaves));
+
wpan_phy_free(priv->phy);
mutex_destroy(&priv->slaves_mtx);
@@ -80,6 +213,9 @@ int ieee802154_register_device(struct ieee802154_dev *dev)
wpan_phy_set_dev(priv->phy, priv->hw.parent);
+ priv->phy->add_iface = mac802154_add_iface;
+ priv->phy->del_iface = mac802154_del_iface;
+
rc = wpan_phy_register(priv->phy);
if (rc < 0)
goto out_wq;
@@ -99,9 +235,12 @@ out:
}
EXPORT_SYMBOL(ieee802154_register_device);
+
+
void ieee802154_unregister_device(struct ieee802154_dev *dev)
{
struct mac802154_priv *priv = mac802154_to_priv(dev);
+ struct mac802154_sub_if_data *sdata, *next;
flush_workqueue(priv->dev_workqueue);
destroy_workqueue(priv->dev_workqueue);
@@ -112,6 +251,14 @@ void ieee802154_unregister_device(struct ieee802154_dev *dev)
priv->running = 0;
mutex_unlock(&priv->slaves_mtx);
+ list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
+ mutex_lock(&sdata->hw->slaves_mtx);
+ list_del(&sdata->list);
+ mutex_unlock(&sdata->hw->slaves_mtx);
+
+ unregister_netdevice(sdata->dev);
+ }
+
rtnl_unlock();
wpan_phy_unregister(priv->phy);
--
1.7.2.3
--
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