1 files changed, 411 insertions, 0 deletions

diff --git a/net/mac802154/main.c b/net/mac802154/main.c
new file mode 100644
index 000000000000..086d4a91ae45
--- /dev/null
+++ b/net/mac802154/main.c
@@ -0,0 +1,411 @@
+/*
+ * Copyright (C) 2007-2012 Siemens AG
+ *
+ * Written by:
+ * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
+ *
+ * Based on the code from 'linux-zigbee.sourceforge.net' project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+
+#include <net/netlink.h>
+#include <linux/nl802154.h>
+#include <net/mac802154.h>
+#include <net/ieee802154_netdev.h>
+#include <net/route.h>
+#include <net/wpan-phy.h>
+
+#include "mac802154.h"
+
+int mac802154_slave_open(struct net_device *dev)
+{
+        struct mac802154_sub_if_data *priv = netdev_priv(dev);
+        struct mac802154_sub_if_data *subif;
+        struct mac802154_priv *ipriv = priv->hw;
+        int res = 0;
+
+        ASSERT_RTNL();
+
+        if (priv->type == IEEE802154_DEV_WPAN) {
+                mutex_lock(&priv->hw->slaves_mtx);
+                list_for_each_entry(subif, &priv->hw->slaves, list) {
+                        if (subif != priv && subif->type == priv->type &&
+                            subif->running) {
+                                mutex_unlock(&priv->hw->slaves_mtx);
+                                return -EBUSY;
+                        }
+                }
+                mutex_unlock(&priv->hw->slaves_mtx);
+        }
+
+        mutex_lock(&priv->hw->slaves_mtx);
+        priv->running = true;
+        mutex_unlock(&priv->hw->slaves_mtx);
+
+        if (ipriv->open_count++ == 0) {
+                res = ipriv->ops->start(&ipriv->hw);
+                WARN_ON(res);
+                if (res)
+                        goto err;
+        }
+
+        if (ipriv->ops->ieee_addr) {
+                __le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr);
+
+                res = ipriv->ops->ieee_addr(&ipriv->hw, 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);
+        struct mac802154_priv *ipriv = priv->hw;
+
+        ASSERT_RTNL();
+
+        netif_stop_queue(dev);
+
+        mutex_lock(&priv->hw->slaves_mtx);
+        priv->running = false;
+        mutex_unlock(&priv->hw->slaves_mtx);
+
+        if (!--ipriv->open_count)
+                ipriv->ops->stop(&ipriv->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;
+
+        switch (type) {
+        case IEEE802154_DEV_MONITOR:
+                dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
+                                   name, NET_NAME_UNKNOWN,
+                                   mac802154_monitor_setup);
+                break;
+        case IEEE802154_DEV_WPAN:
+                dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
+                                   name, NET_NAME_UNKNOWN,
+                                   mac802154_wpan_setup);
+                break;
+        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 an incremented device refcount */
+        return dev;
+
+err_free:
+        free_netdev(dev);
+err:
+        return ERR_PTR(err);
+}
+
+static int mac802154_set_txpower(struct wpan_phy *phy, int db)
+{
+        struct mac802154_priv *priv = wpan_phy_priv(phy);
+
+        return priv->ops->set_txpower(&priv->hw, db);
+}
+
+static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
+{
+        struct mac802154_priv *priv = wpan_phy_priv(phy);
+
+        return priv->ops->set_lbt(&priv->hw, on);
+}
+
+static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode)
+{
+        struct mac802154_priv *priv = wpan_phy_priv(phy);
+
+        return priv->ops->set_cca_mode(&priv->hw, mode);
+}
+
+static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level)
+{
+        struct mac802154_priv *priv = wpan_phy_priv(phy);
+
+        return priv->ops->set_cca_ed_level(&priv->hw, level);
+}
+
+static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be,
+                                     u8 max_be, u8 retries)
+{
+        struct mac802154_priv *priv = wpan_phy_priv(phy);
+
+        return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries);
+}
+
+static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries)
+{
+        struct mac802154_priv *priv = wpan_phy_priv(phy);
+
+        return priv->ops->set_frame_retries(&priv->hw, retries);
+}
+
+struct ieee802154_dev *
+ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
+{
+        struct wpan_phy *phy;
+        struct mac802154_priv *priv;
+        size_t priv_size;
+
+        if (!ops || !ops->xmit || !ops->ed || !ops->start ||
+            !ops->stop || !ops->set_channel) {
+                pr_err("undefined IEEE802.15.4 device operations\n");
+                return NULL;
+        }
+
+        /* Ensure 32-byte alignment of our private data and hw private data.
+         * We use the wpan_phy priv data for both our mac802154_priv and for
+         * the driver's private data
+         *
+         * in memory it'll be like this:
+         *
+         * +-----------------------+
+         * | struct wpan_phy       |
+         * +-----------------------+
+         * | struct mac802154_priv |
+         * +-----------------------+
+         * | driver's private data |
+         * +-----------------------+
+         *
+         * Due to ieee802154 layer isn't aware of driver and MAC structures,
+         * so lets align them here.
+         */
+
+        priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;
+
+        phy = wpan_phy_alloc(priv_size);
+        if (!phy) {
+                pr_err("failure to allocate master IEEE802.15.4 device\n");
+                return NULL;
+        }
+
+        priv = wpan_phy_priv(phy);
+        priv->phy = phy;
+        priv->hw.phy = priv->phy;
+        priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
+        priv->ops = ops;
+
+        INIT_LIST_HEAD(&priv->slaves);
+        mutex_init(&priv->slaves_mtx);
+
+        return &priv->hw;
+}
+EXPORT_SYMBOL(ieee802154_alloc_device);
+
+void ieee802154_free_device(struct ieee802154_dev *hw)
+{
+        struct mac802154_priv *priv = mac802154_to_priv(hw);
+
+        BUG_ON(!list_empty(&priv->slaves));
+
+        mutex_destroy(&priv->slaves_mtx);
+
+        wpan_phy_free(priv->phy);
+}
+EXPORT_SYMBOL(ieee802154_free_device);
+
+int ieee802154_register_device(struct ieee802154_dev *dev)
+{
+        struct mac802154_priv *priv = mac802154_to_priv(dev);
+        int rc = -ENOSYS;
+
+        if (dev->flags & IEEE802154_HW_TXPOWER) {
+                if (!priv->ops->set_txpower)
+                        goto out;
+
+                priv->phy->set_txpower = mac802154_set_txpower;
+        }
+
+        if (dev->flags & IEEE802154_HW_LBT) {
+                if (!priv->ops->set_lbt)
+                        goto out;
+
+                priv->phy->set_lbt = mac802154_set_lbt;
+        }
+
+        if (dev->flags & IEEE802154_HW_CCA_MODE) {
+                if (!priv->ops->set_cca_mode)
+                        goto out;
+
+                priv->phy->set_cca_mode = mac802154_set_cca_mode;
+        }
+
+        if (dev->flags & IEEE802154_HW_CCA_ED_LEVEL) {
+                if (!priv->ops->set_cca_ed_level)
+                        goto out;
+
+                priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
+        }
+
+        if (dev->flags & IEEE802154_HW_CSMA_PARAMS) {
+                if (!priv->ops->set_csma_params)
+                        goto out;
+
+                priv->phy->set_csma_params = mac802154_set_csma_params;
+        }
+
+        if (dev->flags & IEEE802154_HW_FRAME_RETRIES) {
+                if (!priv->ops->set_frame_retries)
+                        goto out;
+
+                priv->phy->set_frame_retries = mac802154_set_frame_retries;
+        }
+
+        priv->dev_workqueue =
+                create_singlethread_workqueue(wpan_phy_name(priv->phy));
+        if (!priv->dev_workqueue) {
+                rc = -ENOMEM;
+                goto out;
+        }
+
+        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;
+
+        rtnl_lock();
+
+        mutex_lock(&priv->slaves_mtx);
+        priv->running = MAC802154_DEVICE_RUN;
+        mutex_unlock(&priv->slaves_mtx);
+
+        rtnl_unlock();
+
+        return 0;
+
+out_wq:
+        destroy_workqueue(priv->dev_workqueue);
+out:
+        return rc;
+}
+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);
+
+        rtnl_lock();
+
+        mutex_lock(&priv->slaves_mtx);
+        priv->running = MAC802154_DEVICE_STOPPED;
+        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);
+}
+EXPORT_SYMBOL(ieee802154_unregister_device);
+
+MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
+MODULE_LICENSE("GPL v2");