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alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +00001/*
2 * Copyright (C) 2007-2012 Siemens AG
3 *
4 * Written by:
5 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
6 *
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +00007 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000015 */
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/netdevice.h>
20
alex.bluesman.smirnov@gmail.com62610ad2012-05-15 20:50:28 +000021#include <net/netlink.h>
Alexander Aring944742a2014-11-17 08:20:49 +010022#include <net/nl802154.h>
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000023#include <net/mac802154.h>
Phoebe Buckheisterb70ab2e2014-03-14 21:23:59 +010024#include <net/ieee802154_netdev.h>
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000025#include <net/route.h>
Alexander Aring5ad60d32014-10-25 09:41:02 +020026#include <net/cfg802154.h>
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000027
Alexander Aring0f1556b2014-10-25 09:41:00 +020028#include "ieee802154_i.h"
Alexander Aring1201cd22014-11-02 04:18:36 +010029#include "cfg.h"
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000030
Alexander Aringc5c47e62014-10-27 17:13:30 +010031static void ieee802154_tasklet_handler(unsigned long data)
32{
33 struct ieee802154_local *local = (struct ieee802154_local *)data;
34 struct sk_buff *skb;
35
36 while ((skb = skb_dequeue(&local->skb_queue))) {
37 switch (skb->pkt_type) {
38 case IEEE802154_RX_MSG:
39 /* Clear skb->pkt_type in order to not confuse kernel
40 * netstack.
41 */
42 skb->pkt_type = 0;
Varka Bhadramd10270c2015-07-07 10:50:43 +053043 ieee802154_rx(local, skb);
Alexander Aringc5c47e62014-10-27 17:13:30 +010044 break;
45 default:
46 WARN(1, "mac802154: Packet is of unknown type %d\n",
47 skb->pkt_type);
48 kfree_skb(skb);
49 break;
50 }
51 }
52}
53
Alexander Aring5a504392014-10-25 17:16:34 +020054struct ieee802154_hw *
Alexander Aring16301862014-10-28 18:21:18 +010055ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000056{
57 struct wpan_phy *phy;
Alexander Aringa5e1ec52014-10-25 17:16:35 +020058 struct ieee802154_local *local;
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000059 size_t priv_size;
60
Varka Bhadram8f451822015-06-23 11:41:03 +053061 if (WARN_ON(!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed ||
62 !ops->start || !ops->stop || !ops->set_channel))
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000063 return NULL;
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000064
65 /* Ensure 32-byte alignment of our private data and hw private data.
Alexander Aringa5e1ec52014-10-25 17:16:35 +020066 * We use the wpan_phy priv data for both our ieee802154_local and for
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000067 * the driver's private data
68 *
69 * in memory it'll be like this:
70 *
Alexander Aringa5e1ec52014-10-25 17:16:35 +020071 * +-------------------------+
72 * | struct wpan_phy |
73 * +-------------------------+
74 * | struct ieee802154_local |
75 * +-------------------------+
76 * | driver's private data |
77 * +-------------------------+
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000078 *
79 * Due to ieee802154 layer isn't aware of driver and MAC structures,
Alexander Aring139f14a2014-10-25 05:25:08 +020080 * so lets align them here.
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000081 */
82
Alexander Aringa5e1ec52014-10-25 17:16:35 +020083 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000084
Alexander Aringf6013792014-11-09 08:36:47 +010085 phy = wpan_phy_new(&mac802154_config_ops, priv_size);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000086 if (!phy) {
Chen Weilong83a1a7c2013-10-30 15:28:07 +080087 pr_err("failure to allocate master IEEE802.15.4 device\n");
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000088 return NULL;
89 }
90
Alexander Aring6322d502014-11-12 03:36:51 +010091 phy->privid = mac802154_wpan_phy_privid;
92
Alexander Aringa5e1ec52014-10-25 17:16:35 +020093 local = wpan_phy_priv(phy);
94 local->phy = phy;
95 local->hw.phy = local->phy;
96 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
97 local->ops = ops;
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +000098
Alexander Aringd98be452014-10-25 17:16:38 +020099 INIT_LIST_HEAD(&local->interfaces);
100 mutex_init(&local->iflist_mtx);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000101
Alexander Aringc5c47e62014-10-27 17:13:30 +0100102 tasklet_init(&local->tasklet,
103 ieee802154_tasklet_handler,
104 (unsigned long)local);
105
106 skb_queue_head_init(&local->skb_queue);
107
Lennert Buytenhekc22ff7b2015-07-21 17:44:47 +0300108 INIT_WORK(&local->tx_work, ieee802154_xmit_worker);
109
Alexander Aringfea33182015-05-17 21:44:43 +0200110 /* init supported flags with 802.15.4 default ranges */
111 phy->supported.max_minbe = 8;
112 phy->supported.min_maxbe = 3;
113 phy->supported.max_maxbe = 8;
Alexander Aring89c7d782015-08-10 21:15:56 +0200114 phy->supported.min_frame_retries = 0;
Alexander Aringfea33182015-05-17 21:44:43 +0200115 phy->supported.max_frame_retries = 7;
116 phy->supported.max_csma_backoffs = 5;
117 phy->supported.lbt = NL802154_SUPPORTED_BOOL_FALSE;
118
Alexander Aring65318682015-05-17 21:44:47 +0200119 /* always supported */
120 phy->supported.iftypes = BIT(NL802154_IFTYPE_NODE);
121
Alexander Aringa5e1ec52014-10-25 17:16:35 +0200122 return &local->hw;
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000123}
Alexander Aring5a504392014-10-25 17:16:34 +0200124EXPORT_SYMBOL(ieee802154_alloc_hw);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000125
Alexander Aring5a504392014-10-25 17:16:34 +0200126void ieee802154_free_hw(struct ieee802154_hw *hw)
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000127{
Alexander Aring60741362014-10-25 17:16:39 +0200128 struct ieee802154_local *local = hw_to_local(hw);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000129
Alexander Aringd98be452014-10-25 17:16:38 +0200130 BUG_ON(!list_empty(&local->interfaces));
alex.bluesman.smirnov@gmail.com62610ad2012-05-15 20:50:28 +0000131
Alexander Aringd98be452014-10-25 17:16:38 +0200132 mutex_destroy(&local->iflist_mtx);
Konstantin Khlebnikov1e9f9542012-12-14 01:03:03 +0000133
Alexander Aringa5e1ec52014-10-25 17:16:35 +0200134 wpan_phy_free(local->phy);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000135}
Alexander Aring5a504392014-10-25 17:16:34 +0200136EXPORT_SYMBOL(ieee802154_free_hw);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000137
Alexander Aring61f2dcb2014-11-12 19:51:56 +0100138static void ieee802154_setup_wpan_phy_pib(struct wpan_phy *wpan_phy)
139{
140 /* TODO warn on empty symbol_duration
141 * Should be done when all drivers sets this value.
142 */
143
144 wpan_phy->lifs_period = IEEE802154_LIFS_PERIOD *
145 wpan_phy->symbol_duration;
146 wpan_phy->sifs_period = IEEE802154_SIFS_PERIOD *
147 wpan_phy->symbol_duration;
148}
149
Alexander Aring5a504392014-10-25 17:16:34 +0200150int ieee802154_register_hw(struct ieee802154_hw *hw)
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000151{
Alexander Aring60741362014-10-25 17:16:39 +0200152 struct ieee802154_local *local = hw_to_local(hw);
Alexander Aringe4962a12014-11-05 20:51:19 +0100153 struct net_device *dev;
Alexander Aring640985e2014-07-03 00:20:43 +0200154 int rc = -ENOSYS;
155
Alexander Aringf7730542014-10-25 17:16:41 +0200156 local->workqueue =
Alexander Aringa5e1ec52014-10-25 17:16:35 +0200157 create_singlethread_workqueue(wpan_phy_name(local->phy));
Alexander Aringf7730542014-10-25 17:16:41 +0200158 if (!local->workqueue) {
Alexander Aring640985e2014-07-03 00:20:43 +0200159 rc = -ENOMEM;
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000160 goto out;
Alexander Aring640985e2014-07-03 00:20:43 +0200161 }
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000162
Alexander Aring61f2dcb2014-11-12 19:51:56 +0100163 hrtimer_init(&local->ifs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
164 local->ifs_timer.function = ieee802154_xmit_ifs_timer;
165
Alexander Aringa5e1ec52014-10-25 17:16:35 +0200166 wpan_phy_set_dev(local->phy, local->hw.parent);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000167
Alexander Aring61f2dcb2014-11-12 19:51:56 +0100168 ieee802154_setup_wpan_phy_pib(local->phy);
169
Alexander Aringfea33182015-05-17 21:44:43 +0200170 if (!(hw->flags & IEEE802154_HW_CSMA_PARAMS)) {
171 local->phy->supported.min_csma_backoffs = 4;
172 local->phy->supported.max_csma_backoffs = 4;
173 local->phy->supported.min_maxbe = 5;
174 local->phy->supported.max_maxbe = 5;
175 local->phy->supported.min_minbe = 3;
176 local->phy->supported.max_minbe = 3;
177 }
178
179 if (!(hw->flags & IEEE802154_HW_FRAME_RETRIES)) {
Alexander Aring89c7d782015-08-10 21:15:56 +0200180 local->phy->supported.min_frame_retries = 3;
181 local->phy->supported.max_frame_retries = 3;
Alexander Aringfea33182015-05-17 21:44:43 +0200182 }
183
Alexander Aring65318682015-05-17 21:44:47 +0200184 if (hw->flags & IEEE802154_HW_PROMISCUOUS)
185 local->phy->supported.iftypes |= BIT(NL802154_IFTYPE_MONITOR);
186
Alexander Aringa5e1ec52014-10-25 17:16:35 +0200187 rc = wpan_phy_register(local->phy);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000188 if (rc < 0)
189 goto out_wq;
190
Alexander Aringe4962a12014-11-05 20:51:19 +0100191 rtnl_lock();
192
Varka Bhadram5b4a10392015-04-30 17:44:57 +0200193 dev = ieee802154_if_add(local, "wpan%d", NET_NAME_ENUM,
194 NL802154_IFTYPE_NODE,
Alexander Aring0e575472014-11-17 08:20:52 +0100195 cpu_to_le64(0x0000000000000000ULL));
Alexander Aringe4962a12014-11-05 20:51:19 +0100196 if (IS_ERR(dev)) {
197 rtnl_unlock();
198 rc = PTR_ERR(dev);
Alexander Aring2b4d4132015-04-30 17:44:53 +0200199 goto out_phy;
Alexander Aringe4962a12014-11-05 20:51:19 +0100200 }
201
202 rtnl_unlock();
203
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000204 return 0;
205
Alexander Aring2b4d4132015-04-30 17:44:53 +0200206out_phy:
207 wpan_phy_unregister(local->phy);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000208out_wq:
Alexander Aringf7730542014-10-25 17:16:41 +0200209 destroy_workqueue(local->workqueue);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000210out:
211 return rc;
212}
Alexander Aring5a504392014-10-25 17:16:34 +0200213EXPORT_SYMBOL(ieee802154_register_hw);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000214
Alexander Aring5a504392014-10-25 17:16:34 +0200215void ieee802154_unregister_hw(struct ieee802154_hw *hw)
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000216{
Alexander Aring60741362014-10-25 17:16:39 +0200217 struct ieee802154_local *local = hw_to_local(hw);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000218
Alexander Aringc5c47e62014-10-27 17:13:30 +0100219 tasklet_kill(&local->tasklet);
Alexander Aringf7730542014-10-25 17:16:41 +0200220 flush_workqueue(local->workqueue);
221 destroy_workqueue(local->workqueue);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000222
223 rtnl_lock();
224
Alexander Aring592dfbf2014-11-12 03:36:48 +0100225 ieee802154_remove_interfaces(local);
alex.bluesman.smirnov@gmail.com62610ad2012-05-15 20:50:28 +0000226
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000227 rtnl_unlock();
228
Alexander Aringa5e1ec52014-10-25 17:16:35 +0200229 wpan_phy_unregister(local->phy);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000230}
Alexander Aring5a504392014-10-25 17:16:34 +0200231EXPORT_SYMBOL(ieee802154_unregister_hw);
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000232
Alexander Aringbe4fd8e2014-11-12 03:36:53 +0100233static int __init ieee802154_init(void)
234{
235 return ieee802154_iface_init();
236}
237
238static void __exit ieee802154_exit(void)
239{
240 ieee802154_iface_exit();
241
242 rcu_barrier();
243}
244
245subsys_initcall(ieee802154_init);
246module_exit(ieee802154_exit);
247
Alexander Aring912f67a2014-11-12 03:36:52 +0100248MODULE_DESCRIPTION("IEEE 802.15.4 subsystem");
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000249MODULE_LICENSE("GPL v2");