Commit | Line | Data |
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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" |
1010f540 | 31 | |
62610ad2 | 32 | static int |
33 | mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev) | |
34 | { | |
59d19cd7 | 35 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
a5e1ec53 | 36 | struct ieee802154_local *local; |
62610ad2 | 37 | int err; |
38 | ||
a5e1ec53 | 39 | local = wpan_phy_priv(phy); |
62610ad2 | 40 | |
036562f9 | 41 | sdata->dev = dev; |
04e850fe | 42 | sdata->local = local; |
62610ad2 | 43 | |
a5e1ec53 | 44 | dev->needed_headroom = local->hw.extra_tx_headroom; |
62610ad2 | 45 | |
a5e1ec53 | 46 | SET_NETDEV_DEV(dev, &local->phy->dev); |
62610ad2 | 47 | |
62610ad2 | 48 | err = register_netdev(dev); |
49 | if (err < 0) | |
50 | return err; | |
51 | ||
52 | rtnl_lock(); | |
d98be45b AA |
53 | mutex_lock(&local->iflist_mtx); |
54 | list_add_tail_rcu(&sdata->list, &local->interfaces); | |
55 | mutex_unlock(&local->iflist_mtx); | |
62610ad2 | 56 | rtnl_unlock(); |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | static void | |
62 | mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev) | |
63 | { | |
59d19cd7 | 64 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
4710d806 | 65 | |
62610ad2 | 66 | ASSERT_RTNL(); |
62610ad2 | 67 | |
04e850fe | 68 | BUG_ON(sdata->local->phy != phy); |
62610ad2 | 69 | |
d98be45b | 70 | mutex_lock(&sdata->local->iflist_mtx); |
62610ad2 | 71 | list_del_rcu(&sdata->list); |
d98be45b | 72 | mutex_unlock(&sdata->local->iflist_mtx); |
62610ad2 | 73 | |
74 | synchronize_rcu(); | |
75 | unregister_netdevice(sdata->dev); | |
76 | } | |
77 | ||
78 | static struct net_device * | |
79 | mac802154_add_iface(struct wpan_phy *phy, const char *name, int type) | |
80 | { | |
81 | struct net_device *dev; | |
82 | int err = -ENOMEM; | |
83 | ||
62610ad2 | 84 | switch (type) { |
0606069d | 85 | case IEEE802154_DEV_MONITOR: |
036562f9 | 86 | dev = alloc_netdev(sizeof(struct ieee802154_sub_if_data), |
c835a677 TG |
87 | name, NET_NAME_UNKNOWN, |
88 | mac802154_monitor_setup); | |
0606069d | 89 | break; |
32bad7e3 | 90 | case IEEE802154_DEV_WPAN: |
036562f9 | 91 | dev = alloc_netdev(sizeof(struct ieee802154_sub_if_data), |
c835a677 TG |
92 | name, NET_NAME_UNKNOWN, |
93 | mac802154_wpan_setup); | |
32bad7e3 | 94 | break; |
62610ad2 | 95 | default: |
96 | dev = NULL; | |
97 | err = -EINVAL; | |
98 | break; | |
99 | } | |
100 | if (!dev) | |
101 | goto err; | |
102 | ||
103 | err = mac802154_netdev_register(phy, dev); | |
104 | if (err) | |
105 | goto err_free; | |
106 | ||
107 | dev_hold(dev); /* we return an incremented device refcount */ | |
108 | return dev; | |
109 | ||
110 | err_free: | |
111 | free_netdev(dev); | |
112 | err: | |
113 | return ERR_PTR(err); | |
114 | } | |
115 | ||
c5c47e67 AA |
116 | static void ieee802154_tasklet_handler(unsigned long data) |
117 | { | |
118 | struct ieee802154_local *local = (struct ieee802154_local *)data; | |
119 | struct sk_buff *skb; | |
120 | ||
121 | while ((skb = skb_dequeue(&local->skb_queue))) { | |
122 | switch (skb->pkt_type) { | |
123 | case IEEE802154_RX_MSG: | |
124 | /* Clear skb->pkt_type in order to not confuse kernel | |
125 | * netstack. | |
126 | */ | |
127 | skb->pkt_type = 0; | |
128 | ieee802154_rx(&local->hw, skb); | |
129 | break; | |
130 | default: | |
131 | WARN(1, "mac802154: Packet is of unknown type %d\n", | |
132 | skb->pkt_type); | |
133 | kfree_skb(skb); | |
134 | break; | |
135 | } | |
136 | } | |
137 | } | |
138 | ||
5a504397 | 139 | struct ieee802154_hw * |
16301861 | 140 | ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops) |
1010f540 | 141 | { |
142 | struct wpan_phy *phy; | |
a5e1ec53 | 143 | struct ieee802154_local *local; |
1010f540 | 144 | size_t priv_size; |
145 | ||
ed0a5dce AA |
146 | if (!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed || |
147 | !ops->start || !ops->stop || !ops->set_channel) { | |
83a1a7ce | 148 | pr_err("undefined IEEE802.15.4 device operations\n"); |
1010f540 | 149 | return NULL; |
150 | } | |
151 | ||
152 | /* Ensure 32-byte alignment of our private data and hw private data. | |
a5e1ec53 | 153 | * We use the wpan_phy priv data for both our ieee802154_local and for |
1010f540 | 154 | * the driver's private data |
155 | * | |
156 | * in memory it'll be like this: | |
157 | * | |
a5e1ec53 AA |
158 | * +-------------------------+ |
159 | * | struct wpan_phy | | |
160 | * +-------------------------+ | |
161 | * | struct ieee802154_local | | |
162 | * +-------------------------+ | |
163 | * | driver's private data | | |
164 | * +-------------------------+ | |
1010f540 | 165 | * |
166 | * Due to ieee802154 layer isn't aware of driver and MAC structures, | |
139f14ad | 167 | * so lets align them here. |
1010f540 | 168 | */ |
169 | ||
a5e1ec53 | 170 | priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; |
1010f540 | 171 | |
a5dd1d72 | 172 | phy = wpan_phy_alloc(NULL, priv_size); |
1010f540 | 173 | if (!phy) { |
83a1a7ce | 174 | pr_err("failure to allocate master IEEE802.15.4 device\n"); |
1010f540 | 175 | return NULL; |
176 | } | |
177 | ||
a5e1ec53 AA |
178 | local = wpan_phy_priv(phy); |
179 | local->phy = phy; | |
180 | local->hw.phy = local->phy; | |
181 | local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); | |
182 | local->ops = ops; | |
1010f540 | 183 | |
d98be45b AA |
184 | INIT_LIST_HEAD(&local->interfaces); |
185 | mutex_init(&local->iflist_mtx); | |
1010f540 | 186 | |
c5c47e67 AA |
187 | tasklet_init(&local->tasklet, |
188 | ieee802154_tasklet_handler, | |
189 | (unsigned long)local); | |
190 | ||
191 | skb_queue_head_init(&local->skb_queue); | |
192 | ||
a5e1ec53 | 193 | return &local->hw; |
1010f540 | 194 | } |
5a504397 | 195 | EXPORT_SYMBOL(ieee802154_alloc_hw); |
1010f540 | 196 | |
5a504397 | 197 | void ieee802154_free_hw(struct ieee802154_hw *hw) |
1010f540 | 198 | { |
60741361 | 199 | struct ieee802154_local *local = hw_to_local(hw); |
1010f540 | 200 | |
d98be45b | 201 | BUG_ON(!list_empty(&local->interfaces)); |
62610ad2 | 202 | |
d98be45b | 203 | mutex_destroy(&local->iflist_mtx); |
1e9f9545 | 204 | |
a5e1ec53 | 205 | wpan_phy_free(local->phy); |
1010f540 | 206 | } |
5a504397 | 207 | EXPORT_SYMBOL(ieee802154_free_hw); |
1010f540 | 208 | |
5a504397 | 209 | int ieee802154_register_hw(struct ieee802154_hw *hw) |
1010f540 | 210 | { |
60741361 | 211 | struct ieee802154_local *local = hw_to_local(hw); |
640985ec AA |
212 | int rc = -ENOSYS; |
213 | ||
f7730542 | 214 | local->workqueue = |
a5e1ec53 | 215 | create_singlethread_workqueue(wpan_phy_name(local->phy)); |
f7730542 | 216 | if (!local->workqueue) { |
640985ec | 217 | rc = -ENOMEM; |
1010f540 | 218 | goto out; |
640985ec | 219 | } |
1010f540 | 220 | |
a5e1ec53 | 221 | wpan_phy_set_dev(local->phy, local->hw.parent); |
1010f540 | 222 | |
a5e1ec53 AA |
223 | local->phy->add_iface = mac802154_add_iface; |
224 | local->phy->del_iface = mac802154_del_iface; | |
62610ad2 | 225 | |
a5e1ec53 | 226 | rc = wpan_phy_register(local->phy); |
1010f540 | 227 | if (rc < 0) |
228 | goto out_wq; | |
229 | ||
1010f540 | 230 | return 0; |
231 | ||
232 | out_wq: | |
f7730542 | 233 | destroy_workqueue(local->workqueue); |
1010f540 | 234 | out: |
235 | return rc; | |
236 | } | |
5a504397 | 237 | EXPORT_SYMBOL(ieee802154_register_hw); |
1010f540 | 238 | |
5a504397 | 239 | void ieee802154_unregister_hw(struct ieee802154_hw *hw) |
1010f540 | 240 | { |
60741361 | 241 | struct ieee802154_local *local = hw_to_local(hw); |
036562f9 | 242 | struct ieee802154_sub_if_data *sdata, *next; |
1010f540 | 243 | |
c5c47e67 | 244 | tasklet_kill(&local->tasklet); |
f7730542 AA |
245 | flush_workqueue(local->workqueue); |
246 | destroy_workqueue(local->workqueue); | |
1010f540 | 247 | |
248 | rtnl_lock(); | |
249 | ||
d98be45b AA |
250 | list_for_each_entry_safe(sdata, next, &local->interfaces, list) { |
251 | mutex_lock(&sdata->local->iflist_mtx); | |
62610ad2 | 252 | list_del(&sdata->list); |
d98be45b | 253 | mutex_unlock(&sdata->local->iflist_mtx); |
62610ad2 | 254 | |
255 | unregister_netdevice(sdata->dev); | |
256 | } | |
257 | ||
1010f540 | 258 | rtnl_unlock(); |
259 | ||
a5e1ec53 | 260 | wpan_phy_unregister(local->phy); |
1010f540 | 261 | } |
5a504397 | 262 | EXPORT_SYMBOL(ieee802154_unregister_hw); |
1010f540 | 263 | |
264 | MODULE_DESCRIPTION("IEEE 802.15.4 implementation"); | |
265 | MODULE_LICENSE("GPL v2"); |