cregit-Linux how code gets into the kernel

Release 4.11 net/mac802154/main.c

Directory: net/mac802154
/*
 * 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; } } }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Aring87100.00%1100.00%
Total87100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Smirnov14649.49%15.56%
Alexander Aring13044.07%1372.22%
Lennert Buytenhek103.39%15.56%
Varka Bhadram82.71%211.11%
Weilong Chen10.34%15.56%
Total295100.00%18100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Smirnov3370.21%228.57%
Alexander Aring1021.28%457.14%
Konstantin Khlebnikov48.51%114.29%
Total47100.00%7100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Aring32100.00%1100.00%
Total32100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Aring26783.70%1386.67%
Alexander Smirnov5015.67%16.67%
Varka Bhadram20.63%16.67%
Total319100.00%15100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Smirnov3355.00%220.00%
Alexander Aring2033.33%770.00%
Koen Zandberg711.67%110.00%
Total60100.00%10100.00%

EXPORT_SYMBOL(ieee802154_unregister_hw);
static int __init ieee802154_init(void) { return ieee802154_iface_init(); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Aring13100.00%1100.00%
Total13100.00%1100.00%


static void __exit ieee802154_exit(void) { ieee802154_iface_exit(); rcu_barrier(); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Aring15100.00%1100.00%
Total15100.00%1100.00%

subsys_initcall(ieee802154_init); module_exit(ieee802154_exit); MODULE_DESCRIPTION("IEEE 802.15.4 subsystem"); MODULE_LICENSE("GPL v2");

Overall Contributors

PersonTokensPropCommitsCommitProp
Alexander Aring59663.27%2873.68%
Alexander Smirnov31133.01%25.26%
Lennert Buytenhek101.06%12.63%
Varka Bhadram101.06%37.89%
Koen Zandberg70.74%12.63%
Konstantin Khlebnikov40.42%12.63%
Phoebe Buckheister30.32%12.63%
Weilong Chen10.11%12.63%
Total942100.00%38100.00%
Directory: net/mac802154
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