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-rw-r--r--net/mac802154/main.c249
1 files changed, 249 insertions, 0 deletions
diff --git a/net/mac802154/main.c b/net/mac802154/main.c
new file mode 100644
index 000000000..87da85ae5
--- /dev/null
+++ b/net/mac802154/main.c
@@ -0,0 +1,249 @@
+/*
+ * Copyright (C) 2007-2012 Siemens AG
+ *
+ * Written by:
+ * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
+ *
+ * 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 <net/nl802154.h>
+#include <net/mac802154.h>
+#include <net/ieee802154_netdev.h>
+#include <net/route.h>
+#include <net/cfg802154.h>
+
+#include "ieee802154_i.h"
+#include "cfg.h"
+
+static void ieee802154_tasklet_handler(unsigned long data)
+{
+ struct ieee802154_local *local = (struct ieee802154_local *)data;
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&local->skb_queue))) {
+ switch (skb->pkt_type) {
+ case IEEE802154_RX_MSG:
+ /* Clear skb->pkt_type in order to not confuse kernel
+ * netstack.
+ */
+ skb->pkt_type = 0;
+ ieee802154_rx(local, skb);
+ break;
+ default:
+ WARN(1, "mac802154: Packet is of unknown type %d\n",
+ skb->pkt_type);
+ kfree_skb(skb);
+ break;
+ }
+ }
+}
+
+struct ieee802154_hw *
+ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
+{
+ struct wpan_phy *phy;
+ struct ieee802154_local *local;
+ size_t priv_size;
+
+ if (WARN_ON(!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed ||
+ !ops->start || !ops->stop || !ops->set_channel))
+ return NULL;
+
+ /* Ensure 32-byte alignment of our private data and hw private data.
+ * We use the wpan_phy priv data for both our ieee802154_local and for
+ * the driver's private data
+ *
+ * in memory it'll be like this:
+ *
+ * +-------------------------+
+ * | struct wpan_phy |
+ * +-------------------------+
+ * | struct ieee802154_local |
+ * +-------------------------+
+ * | 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(*local), NETDEV_ALIGN) + priv_data_len;
+
+ phy = wpan_phy_new(&mac802154_config_ops, priv_size);
+ if (!phy) {
+ pr_err("failure to allocate master IEEE802.15.4 device\n");
+ return NULL;
+ }
+
+ phy->privid = mac802154_wpan_phy_privid;
+
+ local = wpan_phy_priv(phy);
+ local->phy = phy;
+ local->hw.phy = local->phy;
+ local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
+ local->ops = ops;
+
+ INIT_LIST_HEAD(&local->interfaces);
+ mutex_init(&local->iflist_mtx);
+
+ tasklet_init(&local->tasklet,
+ ieee802154_tasklet_handler,
+ (unsigned long)local);
+
+ skb_queue_head_init(&local->skb_queue);
+
+ INIT_WORK(&local->tx_work, ieee802154_xmit_worker);
+
+ /* init supported flags with 802.15.4 default ranges */
+ phy->supported.max_minbe = 8;
+ phy->supported.min_maxbe = 3;
+ phy->supported.max_maxbe = 8;
+ phy->supported.min_frame_retries = 0;
+ phy->supported.max_frame_retries = 7;
+ phy->supported.max_csma_backoffs = 5;
+ phy->supported.lbt = NL802154_SUPPORTED_BOOL_FALSE;
+
+ /* always supported */
+ phy->supported.iftypes = BIT(NL802154_IFTYPE_NODE);
+
+ return &local->hw;
+}
+EXPORT_SYMBOL(ieee802154_alloc_hw);
+
+void ieee802154_free_hw(struct ieee802154_hw *hw)
+{
+ struct ieee802154_local *local = hw_to_local(hw);
+
+ BUG_ON(!list_empty(&local->interfaces));
+
+ mutex_destroy(&local->iflist_mtx);
+
+ wpan_phy_free(local->phy);
+}
+EXPORT_SYMBOL(ieee802154_free_hw);
+
+static void ieee802154_setup_wpan_phy_pib(struct wpan_phy *wpan_phy)
+{
+ /* TODO warn on empty symbol_duration
+ * Should be done when all drivers sets this value.
+ */
+
+ wpan_phy->lifs_period = IEEE802154_LIFS_PERIOD *
+ wpan_phy->symbol_duration;
+ wpan_phy->sifs_period = IEEE802154_SIFS_PERIOD *
+ wpan_phy->symbol_duration;
+}
+
+int ieee802154_register_hw(struct ieee802154_hw *hw)
+{
+ struct ieee802154_local *local = hw_to_local(hw);
+ struct net_device *dev;
+ int rc = -ENOSYS;
+
+ local->workqueue =
+ create_singlethread_workqueue(wpan_phy_name(local->phy));
+ if (!local->workqueue) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ hrtimer_init(&local->ifs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ local->ifs_timer.function = ieee802154_xmit_ifs_timer;
+
+ wpan_phy_set_dev(local->phy, local->hw.parent);
+
+ ieee802154_setup_wpan_phy_pib(local->phy);
+
+ if (!(hw->flags & IEEE802154_HW_CSMA_PARAMS)) {
+ local->phy->supported.min_csma_backoffs = 4;
+ local->phy->supported.max_csma_backoffs = 4;
+ local->phy->supported.min_maxbe = 5;
+ local->phy->supported.max_maxbe = 5;
+ local->phy->supported.min_minbe = 3;
+ local->phy->supported.max_minbe = 3;
+ }
+
+ if (!(hw->flags & IEEE802154_HW_FRAME_RETRIES)) {
+ local->phy->supported.min_frame_retries = 3;
+ local->phy->supported.max_frame_retries = 3;
+ }
+
+ if (hw->flags & IEEE802154_HW_PROMISCUOUS)
+ local->phy->supported.iftypes |= BIT(NL802154_IFTYPE_MONITOR);
+
+ rc = wpan_phy_register(local->phy);
+ if (rc < 0)
+ goto out_wq;
+
+ rtnl_lock();
+
+ dev = ieee802154_if_add(local, "wpan%d", NET_NAME_ENUM,
+ NL802154_IFTYPE_NODE,
+ cpu_to_le64(0x0000000000000000ULL));
+ if (IS_ERR(dev)) {
+ rtnl_unlock();
+ rc = PTR_ERR(dev);
+ goto out_phy;
+ }
+
+ rtnl_unlock();
+
+ return 0;
+
+out_phy:
+ wpan_phy_unregister(local->phy);
+out_wq:
+ destroy_workqueue(local->workqueue);
+out:
+ return rc;
+}
+EXPORT_SYMBOL(ieee802154_register_hw);
+
+void ieee802154_unregister_hw(struct ieee802154_hw *hw)
+{
+ struct ieee802154_local *local = hw_to_local(hw);
+
+ tasklet_kill(&local->tasklet);
+ flush_workqueue(local->workqueue);
+
+ rtnl_lock();
+
+ ieee802154_remove_interfaces(local);
+
+ rtnl_unlock();
+
+ destroy_workqueue(local->workqueue);
+ wpan_phy_unregister(local->phy);
+}
+EXPORT_SYMBOL(ieee802154_unregister_hw);
+
+static int __init ieee802154_init(void)
+{
+ return ieee802154_iface_init();
+}
+
+static void __exit ieee802154_exit(void)
+{
+ ieee802154_iface_exit();
+
+ rcu_barrier();
+}
+
+subsys_initcall(ieee802154_init);
+module_exit(ieee802154_exit);
+
+MODULE_DESCRIPTION("IEEE 802.15.4 subsystem");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 10:52:03 +0000