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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> |
28 | #include <net/wpan-phy.h> | |
29 | ||
0f1556bc | 30 | #include "ieee802154_i.h" |
1010f540 | 31 | |
62610ad2 | 32 | int mac802154_slave_open(struct net_device *dev) |
33 | { | |
34 | struct mac802154_sub_if_data *priv = netdev_priv(dev); | |
336908f6 | 35 | struct mac802154_sub_if_data *subif; |
62610ad2 | 36 | struct mac802154_priv *ipriv = priv->hw; |
37 | int res = 0; | |
38 | ||
336908f6 PB |
39 | ASSERT_RTNL(); |
40 | ||
41 | if (priv->type == IEEE802154_DEV_WPAN) { | |
42 | mutex_lock(&priv->hw->slaves_mtx); | |
43 | list_for_each_entry(subif, &priv->hw->slaves, list) { | |
44 | if (subif != priv && subif->type == priv->type && | |
45 | subif->running) { | |
46 | mutex_unlock(&priv->hw->slaves_mtx); | |
47 | return -EBUSY; | |
48 | } | |
49 | } | |
50 | mutex_unlock(&priv->hw->slaves_mtx); | |
51 | } | |
52 | ||
53 | mutex_lock(&priv->hw->slaves_mtx); | |
54 | priv->running = true; | |
55 | mutex_unlock(&priv->hw->slaves_mtx); | |
56 | ||
62610ad2 | 57 | if (ipriv->open_count++ == 0) { |
58 | res = ipriv->ops->start(&ipriv->hw); | |
59 | WARN_ON(res); | |
60 | if (res) | |
61 | goto err; | |
62 | } | |
63 | ||
64 | if (ipriv->ops->ieee_addr) { | |
b70ab2e8 PB |
65 | __le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr); |
66 | ||
67 | res = ipriv->ops->ieee_addr(&ipriv->hw, addr); | |
62610ad2 | 68 | WARN_ON(res); |
69 | if (res) | |
70 | goto err; | |
71 | mac802154_dev_set_ieee_addr(dev); | |
72 | } | |
73 | ||
74 | netif_start_queue(dev); | |
75 | return 0; | |
76 | err: | |
77 | priv->hw->open_count--; | |
78 | ||
79 | return res; | |
80 | } | |
81 | ||
82 | int mac802154_slave_close(struct net_device *dev) | |
83 | { | |
84 | struct mac802154_sub_if_data *priv = netdev_priv(dev); | |
85 | struct mac802154_priv *ipriv = priv->hw; | |
86 | ||
336908f6 PB |
87 | ASSERT_RTNL(); |
88 | ||
62610ad2 | 89 | netif_stop_queue(dev); |
90 | ||
336908f6 PB |
91 | mutex_lock(&priv->hw->slaves_mtx); |
92 | priv->running = false; | |
93 | mutex_unlock(&priv->hw->slaves_mtx); | |
94 | ||
62610ad2 | 95 | if (!--ipriv->open_count) |
96 | ipriv->ops->stop(&ipriv->hw); | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | static int | |
102 | mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev) | |
103 | { | |
104 | struct mac802154_sub_if_data *priv; | |
105 | struct mac802154_priv *ipriv; | |
106 | int err; | |
107 | ||
108 | ipriv = wpan_phy_priv(phy); | |
109 | ||
110 | priv = netdev_priv(dev); | |
111 | priv->dev = dev; | |
112 | priv->hw = ipriv; | |
113 | ||
114 | dev->needed_headroom = ipriv->hw.extra_tx_headroom; | |
115 | ||
116 | SET_NETDEV_DEV(dev, &ipriv->phy->dev); | |
117 | ||
118 | mutex_lock(&ipriv->slaves_mtx); | |
119 | if (!ipriv->running) { | |
120 | mutex_unlock(&ipriv->slaves_mtx); | |
121 | return -ENODEV; | |
122 | } | |
123 | mutex_unlock(&ipriv->slaves_mtx); | |
124 | ||
125 | err = register_netdev(dev); | |
126 | if (err < 0) | |
127 | return err; | |
128 | ||
129 | rtnl_lock(); | |
130 | mutex_lock(&ipriv->slaves_mtx); | |
131 | list_add_tail_rcu(&priv->list, &ipriv->slaves); | |
132 | mutex_unlock(&ipriv->slaves_mtx); | |
133 | rtnl_unlock(); | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static void | |
139 | mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev) | |
140 | { | |
141 | struct mac802154_sub_if_data *sdata; | |
4710d806 | 142 | |
62610ad2 | 143 | ASSERT_RTNL(); |
144 | ||
145 | sdata = netdev_priv(dev); | |
146 | ||
147 | BUG_ON(sdata->hw->phy != phy); | |
148 | ||
149 | mutex_lock(&sdata->hw->slaves_mtx); | |
150 | list_del_rcu(&sdata->list); | |
151 | mutex_unlock(&sdata->hw->slaves_mtx); | |
152 | ||
153 | synchronize_rcu(); | |
154 | unregister_netdevice(sdata->dev); | |
155 | } | |
156 | ||
157 | static struct net_device * | |
158 | mac802154_add_iface(struct wpan_phy *phy, const char *name, int type) | |
159 | { | |
160 | struct net_device *dev; | |
161 | int err = -ENOMEM; | |
162 | ||
62610ad2 | 163 | switch (type) { |
0606069d | 164 | case IEEE802154_DEV_MONITOR: |
165 | dev = alloc_netdev(sizeof(struct mac802154_sub_if_data), | |
c835a677 TG |
166 | name, NET_NAME_UNKNOWN, |
167 | mac802154_monitor_setup); | |
0606069d | 168 | break; |
32bad7e3 | 169 | case IEEE802154_DEV_WPAN: |
170 | dev = alloc_netdev(sizeof(struct mac802154_sub_if_data), | |
c835a677 TG |
171 | name, NET_NAME_UNKNOWN, |
172 | mac802154_wpan_setup); | |
32bad7e3 | 173 | break; |
62610ad2 | 174 | default: |
175 | dev = NULL; | |
176 | err = -EINVAL; | |
177 | break; | |
178 | } | |
179 | if (!dev) | |
180 | goto err; | |
181 | ||
182 | err = mac802154_netdev_register(phy, dev); | |
183 | if (err) | |
184 | goto err_free; | |
185 | ||
186 | dev_hold(dev); /* we return an incremented device refcount */ | |
187 | return dev; | |
188 | ||
189 | err_free: | |
190 | free_netdev(dev); | |
191 | err: | |
192 | return ERR_PTR(err); | |
193 | } | |
194 | ||
9b2777d6 PB |
195 | static int mac802154_set_txpower(struct wpan_phy *phy, int db) |
196 | { | |
197 | struct mac802154_priv *priv = wpan_phy_priv(phy); | |
198 | ||
9b2777d6 PB |
199 | return priv->ops->set_txpower(&priv->hw, db); |
200 | } | |
201 | ||
84dda3c6 PB |
202 | static int mac802154_set_lbt(struct wpan_phy *phy, bool on) |
203 | { | |
204 | struct mac802154_priv *priv = wpan_phy_priv(phy); | |
205 | ||
84dda3c6 PB |
206 | return priv->ops->set_lbt(&priv->hw, on); |
207 | } | |
208 | ||
ba08fea5 PB |
209 | static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode) |
210 | { | |
211 | struct mac802154_priv *priv = wpan_phy_priv(phy); | |
212 | ||
ba08fea5 PB |
213 | return priv->ops->set_cca_mode(&priv->hw, mode); |
214 | } | |
215 | ||
6ca00197 PB |
216 | static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level) |
217 | { | |
218 | struct mac802154_priv *priv = wpan_phy_priv(phy); | |
219 | ||
6ca00197 PB |
220 | return priv->ops->set_cca_ed_level(&priv->hw, level); |
221 | } | |
222 | ||
4244db1b PB |
223 | static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be, |
224 | u8 max_be, u8 retries) | |
225 | { | |
226 | struct mac802154_priv *priv = wpan_phy_priv(phy); | |
227 | ||
4244db1b PB |
228 | return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries); |
229 | } | |
230 | ||
231 | static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries) | |
232 | { | |
233 | struct mac802154_priv *priv = wpan_phy_priv(phy); | |
234 | ||
4244db1b PB |
235 | return priv->ops->set_frame_retries(&priv->hw, retries); |
236 | } | |
237 | ||
1010f540 | 238 | struct ieee802154_dev * |
239 | ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops) | |
240 | { | |
241 | struct wpan_phy *phy; | |
242 | struct mac802154_priv *priv; | |
243 | size_t priv_size; | |
244 | ||
245 | if (!ops || !ops->xmit || !ops->ed || !ops->start || | |
246 | !ops->stop || !ops->set_channel) { | |
83a1a7ce | 247 | pr_err("undefined IEEE802.15.4 device operations\n"); |
1010f540 | 248 | return NULL; |
249 | } | |
250 | ||
251 | /* Ensure 32-byte alignment of our private data and hw private data. | |
252 | * We use the wpan_phy priv data for both our mac802154_priv and for | |
253 | * the driver's private data | |
254 | * | |
255 | * in memory it'll be like this: | |
256 | * | |
257 | * +-----------------------+ | |
258 | * | struct wpan_phy | | |
259 | * +-----------------------+ | |
260 | * | struct mac802154_priv | | |
261 | * +-----------------------+ | |
262 | * | driver's private data | | |
263 | * +-----------------------+ | |
264 | * | |
265 | * Due to ieee802154 layer isn't aware of driver and MAC structures, | |
139f14ad | 266 | * so lets align them here. |
1010f540 | 267 | */ |
268 | ||
269 | priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len; | |
270 | ||
271 | phy = wpan_phy_alloc(priv_size); | |
272 | if (!phy) { | |
83a1a7ce | 273 | pr_err("failure to allocate master IEEE802.15.4 device\n"); |
1010f540 | 274 | return NULL; |
275 | } | |
276 | ||
277 | priv = wpan_phy_priv(phy); | |
4710d806 VB |
278 | priv->phy = phy; |
279 | priv->hw.phy = priv->phy; | |
1010f540 | 280 | priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN); |
281 | priv->ops = ops; | |
282 | ||
283 | INIT_LIST_HEAD(&priv->slaves); | |
284 | mutex_init(&priv->slaves_mtx); | |
285 | ||
286 | return &priv->hw; | |
287 | } | |
288 | EXPORT_SYMBOL(ieee802154_alloc_device); | |
289 | ||
290 | void ieee802154_free_device(struct ieee802154_dev *hw) | |
291 | { | |
292 | struct mac802154_priv *priv = mac802154_to_priv(hw); | |
293 | ||
62610ad2 | 294 | BUG_ON(!list_empty(&priv->slaves)); |
295 | ||
1010f540 | 296 | mutex_destroy(&priv->slaves_mtx); |
1e9f9545 KK |
297 | |
298 | wpan_phy_free(priv->phy); | |
1010f540 | 299 | } |
300 | EXPORT_SYMBOL(ieee802154_free_device); | |
301 | ||
302 | int ieee802154_register_device(struct ieee802154_dev *dev) | |
303 | { | |
304 | struct mac802154_priv *priv = mac802154_to_priv(dev); | |
640985ec AA |
305 | int rc = -ENOSYS; |
306 | ||
307 | if (dev->flags & IEEE802154_HW_TXPOWER) { | |
308 | if (!priv->ops->set_txpower) | |
309 | goto out; | |
310 | ||
311 | priv->phy->set_txpower = mac802154_set_txpower; | |
312 | } | |
313 | ||
314 | if (dev->flags & IEEE802154_HW_LBT) { | |
315 | if (!priv->ops->set_lbt) | |
316 | goto out; | |
317 | ||
318 | priv->phy->set_lbt = mac802154_set_lbt; | |
319 | } | |
320 | ||
321 | if (dev->flags & IEEE802154_HW_CCA_MODE) { | |
322 | if (!priv->ops->set_cca_mode) | |
323 | goto out; | |
324 | ||
325 | priv->phy->set_cca_mode = mac802154_set_cca_mode; | |
326 | } | |
327 | ||
328 | if (dev->flags & IEEE802154_HW_CCA_ED_LEVEL) { | |
329 | if (!priv->ops->set_cca_ed_level) | |
330 | goto out; | |
331 | ||
332 | priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level; | |
333 | } | |
334 | ||
335 | if (dev->flags & IEEE802154_HW_CSMA_PARAMS) { | |
336 | if (!priv->ops->set_csma_params) | |
337 | goto out; | |
338 | ||
339 | priv->phy->set_csma_params = mac802154_set_csma_params; | |
340 | } | |
341 | ||
342 | if (dev->flags & IEEE802154_HW_FRAME_RETRIES) { | |
343 | if (!priv->ops->set_frame_retries) | |
344 | goto out; | |
345 | ||
346 | priv->phy->set_frame_retries = mac802154_set_frame_retries; | |
347 | } | |
1010f540 | 348 | |
349 | priv->dev_workqueue = | |
350 | create_singlethread_workqueue(wpan_phy_name(priv->phy)); | |
640985ec AA |
351 | if (!priv->dev_workqueue) { |
352 | rc = -ENOMEM; | |
1010f540 | 353 | goto out; |
640985ec | 354 | } |
1010f540 | 355 | |
356 | wpan_phy_set_dev(priv->phy, priv->hw.parent); | |
357 | ||
62610ad2 | 358 | priv->phy->add_iface = mac802154_add_iface; |
359 | priv->phy->del_iface = mac802154_del_iface; | |
360 | ||
1010f540 | 361 | rc = wpan_phy_register(priv->phy); |
362 | if (rc < 0) | |
363 | goto out_wq; | |
364 | ||
365 | rtnl_lock(); | |
366 | ||
367 | mutex_lock(&priv->slaves_mtx); | |
368 | priv->running = MAC802154_DEVICE_RUN; | |
369 | mutex_unlock(&priv->slaves_mtx); | |
370 | ||
371 | rtnl_unlock(); | |
372 | ||
373 | return 0; | |
374 | ||
375 | out_wq: | |
376 | destroy_workqueue(priv->dev_workqueue); | |
377 | out: | |
378 | return rc; | |
379 | } | |
380 | EXPORT_SYMBOL(ieee802154_register_device); | |
381 | ||
382 | void ieee802154_unregister_device(struct ieee802154_dev *dev) | |
383 | { | |
384 | struct mac802154_priv *priv = mac802154_to_priv(dev); | |
62610ad2 | 385 | struct mac802154_sub_if_data *sdata, *next; |
1010f540 | 386 | |
387 | flush_workqueue(priv->dev_workqueue); | |
388 | destroy_workqueue(priv->dev_workqueue); | |
389 | ||
390 | rtnl_lock(); | |
391 | ||
392 | mutex_lock(&priv->slaves_mtx); | |
393 | priv->running = MAC802154_DEVICE_STOPPED; | |
394 | mutex_unlock(&priv->slaves_mtx); | |
395 | ||
62610ad2 | 396 | list_for_each_entry_safe(sdata, next, &priv->slaves, list) { |
397 | mutex_lock(&sdata->hw->slaves_mtx); | |
398 | list_del(&sdata->list); | |
399 | mutex_unlock(&sdata->hw->slaves_mtx); | |
400 | ||
401 | unregister_netdevice(sdata->dev); | |
402 | } | |
403 | ||
1010f540 | 404 | rtnl_unlock(); |
405 | ||
406 | wpan_phy_unregister(priv->phy); | |
407 | } | |
408 | EXPORT_SYMBOL(ieee802154_unregister_device); | |
409 | ||
410 | MODULE_DESCRIPTION("IEEE 802.15.4 implementation"); | |
411 | MODULE_LICENSE("GPL v2"); |