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1010f540 | 1 | /* |
2 | * Copyright (C) 2007-2012 Siemens AG | |
3 | * | |
4 | * Written by: | |
5 | * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> | |
6 | * | |
7 | * Based on the code from 'linux-zigbee.sourceforge.net' project. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 | |
11 | * as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
1010f540 | 17 | */ |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/netdevice.h> | |
22 | ||
62610ad2 | 23 | #include <net/netlink.h> |
24 | #include <linux/nl802154.h> | |
1010f540 | 25 | #include <net/mac802154.h> |
b70ab2e8 | 26 | #include <net/ieee802154_netdev.h> |
1010f540 | 27 | #include <net/route.h> |
5ad60d36 | 28 | #include <net/cfg802154.h> |
1010f540 | 29 | |
0f1556bc | 30 | #include "ieee802154_i.h" |
1201cd22 | 31 | #include "cfg.h" |
1010f540 | 32 | |
c5c47e67 AA |
33 | static void ieee802154_tasklet_handler(unsigned long data) |
34 | { | |
35 | struct ieee802154_local *local = (struct ieee802154_local *)data; | |
36 | struct sk_buff *skb; | |
37 | ||
38 | while ((skb = skb_dequeue(&local->skb_queue))) { | |
39 | switch (skb->pkt_type) { | |
40 | case IEEE802154_RX_MSG: | |
41 | /* Clear skb->pkt_type in order to not confuse kernel | |
42 | * netstack. | |
43 | */ | |
44 | skb->pkt_type = 0; | |
45 | ieee802154_rx(&local->hw, skb); | |
46 | break; | |
47 | default: | |
48 | WARN(1, "mac802154: Packet is of unknown type %d\n", | |
49 | skb->pkt_type); | |
50 | kfree_skb(skb); | |
51 | break; | |
52 | } | |
53 | } | |
54 | } | |
55 | ||
5a504397 | 56 | struct ieee802154_hw * |
16301861 | 57 | ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops) |
1010f540 | 58 | { |
59 | struct wpan_phy *phy; | |
a5e1ec53 | 60 | struct ieee802154_local *local; |
1010f540 | 61 | size_t priv_size; |
62 | ||
ed0a5dce AA |
63 | if (!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed || |
64 | !ops->start || !ops->stop || !ops->set_channel) { | |
83a1a7ce | 65 | pr_err("undefined IEEE802.15.4 device operations\n"); |
1010f540 | 66 | return NULL; |
67 | } | |
68 | ||
69 | /* Ensure 32-byte alignment of our private data and hw private data. | |
a5e1ec53 | 70 | * We use the wpan_phy priv data for both our ieee802154_local and for |
1010f540 | 71 | * the driver's private data |
72 | * | |
73 | * in memory it'll be like this: | |
74 | * | |
a5e1ec53 AA |
75 | * +-------------------------+ |
76 | * | struct wpan_phy | | |
77 | * +-------------------------+ | |
78 | * | struct ieee802154_local | | |
79 | * +-------------------------+ | |
80 | * | driver's private data | | |
81 | * +-------------------------+ | |
1010f540 | 82 | * |
83 | * Due to ieee802154 layer isn't aware of driver and MAC structures, | |
139f14ad | 84 | * so lets align them here. |
1010f540 | 85 | */ |
86 | ||
a5e1ec53 | 87 | priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; |
1010f540 | 88 | |
f601379f | 89 | phy = wpan_phy_new(&mac802154_config_ops, priv_size); |
1010f540 | 90 | if (!phy) { |
83a1a7ce | 91 | pr_err("failure to allocate master IEEE802.15.4 device\n"); |
1010f540 | 92 | return NULL; |
93 | } | |
94 | ||
6322d50d AA |
95 | phy->privid = mac802154_wpan_phy_privid; |
96 | ||
a5e1ec53 AA |
97 | local = wpan_phy_priv(phy); |
98 | local->phy = phy; | |
99 | local->hw.phy = local->phy; | |
100 | local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); | |
101 | local->ops = ops; | |
1010f540 | 102 | |
d98be45b AA |
103 | INIT_LIST_HEAD(&local->interfaces); |
104 | mutex_init(&local->iflist_mtx); | |
1010f540 | 105 | |
c5c47e67 AA |
106 | tasklet_init(&local->tasklet, |
107 | ieee802154_tasklet_handler, | |
108 | (unsigned long)local); | |
109 | ||
110 | skb_queue_head_init(&local->skb_queue); | |
111 | ||
a5e1ec53 | 112 | return &local->hw; |
1010f540 | 113 | } |
5a504397 | 114 | EXPORT_SYMBOL(ieee802154_alloc_hw); |
1010f540 | 115 | |
5a504397 | 116 | void ieee802154_free_hw(struct ieee802154_hw *hw) |
1010f540 | 117 | { |
60741361 | 118 | struct ieee802154_local *local = hw_to_local(hw); |
1010f540 | 119 | |
d98be45b | 120 | BUG_ON(!list_empty(&local->interfaces)); |
62610ad2 | 121 | |
d98be45b | 122 | mutex_destroy(&local->iflist_mtx); |
1e9f9545 | 123 | |
a5e1ec53 | 124 | wpan_phy_free(local->phy); |
1010f540 | 125 | } |
5a504397 | 126 | EXPORT_SYMBOL(ieee802154_free_hw); |
1010f540 | 127 | |
5a504397 | 128 | int ieee802154_register_hw(struct ieee802154_hw *hw) |
1010f540 | 129 | { |
60741361 | 130 | struct ieee802154_local *local = hw_to_local(hw); |
e4962a14 | 131 | struct net_device *dev; |
640985ec AA |
132 | int rc = -ENOSYS; |
133 | ||
f7730542 | 134 | local->workqueue = |
a5e1ec53 | 135 | create_singlethread_workqueue(wpan_phy_name(local->phy)); |
f7730542 | 136 | if (!local->workqueue) { |
640985ec | 137 | rc = -ENOMEM; |
1010f540 | 138 | goto out; |
640985ec | 139 | } |
1010f540 | 140 | |
a5e1ec53 | 141 | wpan_phy_set_dev(local->phy, local->hw.parent); |
1010f540 | 142 | |
a5e1ec53 | 143 | rc = wpan_phy_register(local->phy); |
1010f540 | 144 | if (rc < 0) |
145 | goto out_wq; | |
146 | ||
e4962a14 AA |
147 | rtnl_lock(); |
148 | ||
149 | dev = ieee802154_if_add(local, "wpan%d", NULL, IEEE802154_DEV_WPAN); | |
150 | if (IS_ERR(dev)) { | |
151 | rtnl_unlock(); | |
152 | rc = PTR_ERR(dev); | |
153 | goto out_wq; | |
154 | } | |
155 | ||
156 | rtnl_unlock(); | |
157 | ||
1010f540 | 158 | return 0; |
159 | ||
160 | out_wq: | |
f7730542 | 161 | destroy_workqueue(local->workqueue); |
1010f540 | 162 | out: |
163 | return rc; | |
164 | } | |
5a504397 | 165 | EXPORT_SYMBOL(ieee802154_register_hw); |
1010f540 | 166 | |
5a504397 | 167 | void ieee802154_unregister_hw(struct ieee802154_hw *hw) |
1010f540 | 168 | { |
60741361 | 169 | struct ieee802154_local *local = hw_to_local(hw); |
1010f540 | 170 | |
c5c47e67 | 171 | tasklet_kill(&local->tasklet); |
f7730542 AA |
172 | flush_workqueue(local->workqueue); |
173 | destroy_workqueue(local->workqueue); | |
1010f540 | 174 | |
175 | rtnl_lock(); | |
176 | ||
592dfbfc | 177 | ieee802154_remove_interfaces(local); |
62610ad2 | 178 | |
1010f540 | 179 | rtnl_unlock(); |
180 | ||
a5e1ec53 | 181 | wpan_phy_unregister(local->phy); |
1010f540 | 182 | } |
5a504397 | 183 | EXPORT_SYMBOL(ieee802154_unregister_hw); |
1010f540 | 184 | |
be4fd8e5 AA |
185 | static int __init ieee802154_init(void) |
186 | { | |
187 | return ieee802154_iface_init(); | |
188 | } | |
189 | ||
190 | static void __exit ieee802154_exit(void) | |
191 | { | |
192 | ieee802154_iface_exit(); | |
193 | ||
194 | rcu_barrier(); | |
195 | } | |
196 | ||
197 | subsys_initcall(ieee802154_init); | |
198 | module_exit(ieee802154_exit); | |
199 | ||
912f67ae | 200 | MODULE_DESCRIPTION("IEEE 802.15.4 subsystem"); |
1010f540 | 201 | MODULE_LICENSE("GPL v2"); |