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239 lines
5.6 KiB
239 lines
5.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2007-2012 Siemens AG |
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* |
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* Written by: |
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* Alexander Smirnov <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/netdevice.h> |
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#include <net/netlink.h> |
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#include <net/nl802154.h> |
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#include <net/mac802154.h> |
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#include <net/ieee802154_netdev.h> |
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#include <net/route.h> |
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#include <net/cfg802154.h> |
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#include "ieee802154_i.h" |
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#include "cfg.h" |
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static void ieee802154_tasklet_handler(struct tasklet_struct *t) |
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{ |
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struct ieee802154_local *local = from_tasklet(local, t, tasklet); |
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struct sk_buff *skb; |
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while ((skb = skb_dequeue(&local->skb_queue))) { |
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switch (skb->pkt_type) { |
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case IEEE802154_RX_MSG: |
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/* Clear skb->pkt_type in order to not confuse kernel |
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* netstack. |
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*/ |
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skb->pkt_type = 0; |
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ieee802154_rx(local, skb); |
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break; |
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default: |
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WARN(1, "mac802154: Packet is of unknown type %d\n", |
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skb->pkt_type); |
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kfree_skb(skb); |
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break; |
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} |
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} |
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} |
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struct ieee802154_hw * |
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ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops) |
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{ |
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struct wpan_phy *phy; |
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struct ieee802154_local *local; |
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size_t priv_size; |
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if (WARN_ON(!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed || |
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!ops->start || !ops->stop || !ops->set_channel)) |
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return NULL; |
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/* Ensure 32-byte alignment of our private data and hw private data. |
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* We use the wpan_phy priv data for both our ieee802154_local and for |
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* the driver's private data |
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* |
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* in memory it'll be like this: |
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* |
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* +-------------------------+ |
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* | struct wpan_phy | |
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* +-------------------------+ |
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* | struct ieee802154_local | |
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* +-------------------------+ |
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* | driver's private data | |
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* +-------------------------+ |
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* |
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* Due to ieee802154 layer isn't aware of driver and MAC structures, |
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* so lets align them here. |
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*/ |
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priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; |
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phy = wpan_phy_new(&mac802154_config_ops, priv_size); |
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if (!phy) { |
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pr_err("failure to allocate master IEEE802.15.4 device\n"); |
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return NULL; |
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} |
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phy->privid = mac802154_wpan_phy_privid; |
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local = wpan_phy_priv(phy); |
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local->phy = phy; |
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local->hw.phy = local->phy; |
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local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); |
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local->ops = ops; |
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INIT_LIST_HEAD(&local->interfaces); |
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mutex_init(&local->iflist_mtx); |
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tasklet_setup(&local->tasklet, ieee802154_tasklet_handler); |
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skb_queue_head_init(&local->skb_queue); |
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INIT_WORK(&local->tx_work, ieee802154_xmit_worker); |
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/* init supported flags with 802.15.4 default ranges */ |
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phy->supported.max_minbe = 8; |
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phy->supported.min_maxbe = 3; |
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phy->supported.max_maxbe = 8; |
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phy->supported.min_frame_retries = 0; |
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phy->supported.max_frame_retries = 7; |
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phy->supported.max_csma_backoffs = 5; |
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phy->supported.lbt = NL802154_SUPPORTED_BOOL_FALSE; |
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/* always supported */ |
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phy->supported.iftypes = BIT(NL802154_IFTYPE_NODE); |
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return &local->hw; |
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} |
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EXPORT_SYMBOL(ieee802154_alloc_hw); |
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void ieee802154_free_hw(struct ieee802154_hw *hw) |
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{ |
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struct ieee802154_local *local = hw_to_local(hw); |
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BUG_ON(!list_empty(&local->interfaces)); |
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mutex_destroy(&local->iflist_mtx); |
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wpan_phy_free(local->phy); |
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} |
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EXPORT_SYMBOL(ieee802154_free_hw); |
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static void ieee802154_setup_wpan_phy_pib(struct wpan_phy *wpan_phy) |
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{ |
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/* TODO warn on empty symbol_duration |
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* Should be done when all drivers sets this value. |
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*/ |
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wpan_phy->lifs_period = IEEE802154_LIFS_PERIOD * |
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wpan_phy->symbol_duration; |
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wpan_phy->sifs_period = IEEE802154_SIFS_PERIOD * |
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wpan_phy->symbol_duration; |
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} |
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int ieee802154_register_hw(struct ieee802154_hw *hw) |
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{ |
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struct ieee802154_local *local = hw_to_local(hw); |
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struct net_device *dev; |
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int rc = -ENOSYS; |
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local->workqueue = |
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create_singlethread_workqueue(wpan_phy_name(local->phy)); |
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if (!local->workqueue) { |
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rc = -ENOMEM; |
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goto out; |
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} |
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hrtimer_init(&local->ifs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
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local->ifs_timer.function = ieee802154_xmit_ifs_timer; |
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wpan_phy_set_dev(local->phy, local->hw.parent); |
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ieee802154_setup_wpan_phy_pib(local->phy); |
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if (!(hw->flags & IEEE802154_HW_CSMA_PARAMS)) { |
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local->phy->supported.min_csma_backoffs = 4; |
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local->phy->supported.max_csma_backoffs = 4; |
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local->phy->supported.min_maxbe = 5; |
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local->phy->supported.max_maxbe = 5; |
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local->phy->supported.min_minbe = 3; |
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local->phy->supported.max_minbe = 3; |
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} |
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if (!(hw->flags & IEEE802154_HW_FRAME_RETRIES)) { |
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local->phy->supported.min_frame_retries = 3; |
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local->phy->supported.max_frame_retries = 3; |
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} |
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if (hw->flags & IEEE802154_HW_PROMISCUOUS) |
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local->phy->supported.iftypes |= BIT(NL802154_IFTYPE_MONITOR); |
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rc = wpan_phy_register(local->phy); |
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if (rc < 0) |
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goto out_wq; |
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rtnl_lock(); |
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dev = ieee802154_if_add(local, "wpan%d", NET_NAME_ENUM, |
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NL802154_IFTYPE_NODE, |
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cpu_to_le64(0x0000000000000000ULL)); |
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if (IS_ERR(dev)) { |
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rtnl_unlock(); |
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rc = PTR_ERR(dev); |
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goto out_phy; |
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} |
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rtnl_unlock(); |
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return 0; |
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out_phy: |
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wpan_phy_unregister(local->phy); |
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out_wq: |
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destroy_workqueue(local->workqueue); |
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out: |
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return rc; |
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} |
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EXPORT_SYMBOL(ieee802154_register_hw); |
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void ieee802154_unregister_hw(struct ieee802154_hw *hw) |
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{ |
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struct ieee802154_local *local = hw_to_local(hw); |
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tasklet_kill(&local->tasklet); |
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flush_workqueue(local->workqueue); |
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rtnl_lock(); |
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ieee802154_remove_interfaces(local); |
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rtnl_unlock(); |
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destroy_workqueue(local->workqueue); |
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wpan_phy_unregister(local->phy); |
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} |
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EXPORT_SYMBOL(ieee802154_unregister_hw); |
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static int __init ieee802154_init(void) |
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{ |
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return ieee802154_iface_init(); |
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} |
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static void __exit ieee802154_exit(void) |
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{ |
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ieee802154_iface_exit(); |
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rcu_barrier(); |
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} |
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subsys_initcall(ieee802154_init); |
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module_exit(ieee802154_exit); |
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MODULE_DESCRIPTION("IEEE 802.15.4 subsystem"); |
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MODULE_LICENSE("GPL v2");
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