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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 | int mac802154_slave_open(struct net_device *dev) |
33 | { | |
036562f9 AA |
34 | struct ieee802154_sub_if_data *sdata = netdev_priv(dev); |
35 | struct ieee802154_sub_if_data *subif; | |
04e850fe | 36 | struct ieee802154_local *local = sdata->local; |
62610ad2 | 37 | int res = 0; |
38 | ||
336908f6 PB |
39 | ASSERT_RTNL(); |
40 | ||
036562f9 | 41 | if (sdata->type == IEEE802154_DEV_WPAN) { |
d98be45b AA |
42 | mutex_lock(&sdata->local->iflist_mtx); |
43 | list_for_each_entry(subif, &sdata->local->interfaces, list) { | |
036562f9 | 44 | if (subif != sdata && subif->type == sdata->type && |
336908f6 | 45 | subif->running) { |
d98be45b | 46 | mutex_unlock(&sdata->local->iflist_mtx); |
336908f6 PB |
47 | return -EBUSY; |
48 | } | |
49 | } | |
d98be45b | 50 | mutex_unlock(&sdata->local->iflist_mtx); |
336908f6 PB |
51 | } |
52 | ||
d98be45b | 53 | mutex_lock(&sdata->local->iflist_mtx); |
036562f9 | 54 | sdata->running = true; |
d98be45b | 55 | mutex_unlock(&sdata->local->iflist_mtx); |
336908f6 | 56 | |
a5e1ec53 AA |
57 | if (local->open_count++ == 0) { |
58 | res = local->ops->start(&local->hw); | |
62610ad2 | 59 | WARN_ON(res); |
60 | if (res) | |
61 | goto err; | |
62 | } | |
63 | ||
a5e1ec53 | 64 | if (local->ops->ieee_addr) { |
b70ab2e8 PB |
65 | __le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr); |
66 | ||
a5e1ec53 | 67 | res = local->ops->ieee_addr(&local->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: | |
04e850fe | 77 | sdata->local->open_count--; |
62610ad2 | 78 | |
79 | return res; | |
80 | } | |
81 | ||
82 | int mac802154_slave_close(struct net_device *dev) | |
83 | { | |
036562f9 | 84 | struct ieee802154_sub_if_data *sdata = netdev_priv(dev); |
04e850fe | 85 | struct ieee802154_local *local = sdata->local; |
62610ad2 | 86 | |
336908f6 PB |
87 | ASSERT_RTNL(); |
88 | ||
62610ad2 | 89 | netif_stop_queue(dev); |
90 | ||
d98be45b | 91 | mutex_lock(&sdata->local->iflist_mtx); |
036562f9 | 92 | sdata->running = false; |
d98be45b | 93 | mutex_unlock(&sdata->local->iflist_mtx); |
336908f6 | 94 | |
a5e1ec53 AA |
95 | if (!--local->open_count) |
96 | local->ops->stop(&local->hw); | |
62610ad2 | 97 | |
98 | return 0; | |
99 | } | |
100 | ||
101 | static int | |
102 | mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev) | |
103 | { | |
036562f9 | 104 | struct ieee802154_sub_if_data *sdata; |
a5e1ec53 | 105 | struct ieee802154_local *local; |
62610ad2 | 106 | int err; |
107 | ||
a5e1ec53 | 108 | local = wpan_phy_priv(phy); |
62610ad2 | 109 | |
036562f9 AA |
110 | sdata = netdev_priv(dev); |
111 | sdata->dev = dev; | |
04e850fe | 112 | sdata->local = local; |
62610ad2 | 113 | |
a5e1ec53 | 114 | dev->needed_headroom = local->hw.extra_tx_headroom; |
62610ad2 | 115 | |
a5e1ec53 | 116 | SET_NETDEV_DEV(dev, &local->phy->dev); |
62610ad2 | 117 | |
d98be45b | 118 | mutex_lock(&local->iflist_mtx); |
a5e1ec53 | 119 | if (!local->running) { |
d98be45b | 120 | mutex_unlock(&local->iflist_mtx); |
62610ad2 | 121 | return -ENODEV; |
122 | } | |
d98be45b | 123 | mutex_unlock(&local->iflist_mtx); |
62610ad2 | 124 | |
125 | err = register_netdev(dev); | |
126 | if (err < 0) | |
127 | return err; | |
128 | ||
129 | rtnl_lock(); | |
d98be45b AA |
130 | mutex_lock(&local->iflist_mtx); |
131 | list_add_tail_rcu(&sdata->list, &local->interfaces); | |
132 | mutex_unlock(&local->iflist_mtx); | |
62610ad2 | 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 | { | |
036562f9 | 141 | struct ieee802154_sub_if_data *sdata; |
4710d806 | 142 | |
62610ad2 | 143 | ASSERT_RTNL(); |
144 | ||
145 | sdata = netdev_priv(dev); | |
146 | ||
04e850fe | 147 | BUG_ON(sdata->local->phy != phy); |
62610ad2 | 148 | |
d98be45b | 149 | mutex_lock(&sdata->local->iflist_mtx); |
62610ad2 | 150 | list_del_rcu(&sdata->list); |
d98be45b | 151 | mutex_unlock(&sdata->local->iflist_mtx); |
62610ad2 | 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: |
036562f9 | 165 | dev = alloc_netdev(sizeof(struct ieee802154_sub_if_data), |
c835a677 TG |
166 | name, NET_NAME_UNKNOWN, |
167 | mac802154_monitor_setup); | |
0606069d | 168 | break; |
32bad7e3 | 169 | case IEEE802154_DEV_WPAN: |
036562f9 | 170 | dev = alloc_netdev(sizeof(struct ieee802154_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 | { | |
a5e1ec53 | 197 | struct ieee802154_local *local = wpan_phy_priv(phy); |
9b2777d6 | 198 | |
a5e1ec53 | 199 | return local->ops->set_txpower(&local->hw, db); |
9b2777d6 PB |
200 | } |
201 | ||
84dda3c6 PB |
202 | static int mac802154_set_lbt(struct wpan_phy *phy, bool on) |
203 | { | |
a5e1ec53 | 204 | struct ieee802154_local *local = wpan_phy_priv(phy); |
84dda3c6 | 205 | |
a5e1ec53 | 206 | return local->ops->set_lbt(&local->hw, on); |
84dda3c6 PB |
207 | } |
208 | ||
ba08fea5 PB |
209 | static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode) |
210 | { | |
a5e1ec53 | 211 | struct ieee802154_local *local = wpan_phy_priv(phy); |
ba08fea5 | 212 | |
a5e1ec53 | 213 | return local->ops->set_cca_mode(&local->hw, mode); |
ba08fea5 PB |
214 | } |
215 | ||
6ca00197 PB |
216 | static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level) |
217 | { | |
a5e1ec53 | 218 | struct ieee802154_local *local = wpan_phy_priv(phy); |
6ca00197 | 219 | |
a5e1ec53 | 220 | return local->ops->set_cca_ed_level(&local->hw, level); |
6ca00197 PB |
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 | { | |
a5e1ec53 | 226 | struct ieee802154_local *local = wpan_phy_priv(phy); |
4244db1b | 227 | |
a5e1ec53 | 228 | return local->ops->set_csma_params(&local->hw, min_be, max_be, retries); |
4244db1b PB |
229 | } |
230 | ||
231 | static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries) | |
232 | { | |
a5e1ec53 | 233 | struct ieee802154_local *local = wpan_phy_priv(phy); |
4244db1b | 234 | |
a5e1ec53 | 235 | return local->ops->set_frame_retries(&local->hw, retries); |
4244db1b PB |
236 | } |
237 | ||
5a504397 AA |
238 | struct ieee802154_hw * |
239 | ieee802154_alloc_hw(size_t priv_data_len, struct ieee802154_ops *ops) | |
1010f540 | 240 | { |
241 | struct wpan_phy *phy; | |
a5e1ec53 | 242 | struct ieee802154_local *local; |
1010f540 | 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. | |
a5e1ec53 | 252 | * We use the wpan_phy priv data for both our ieee802154_local and for |
1010f540 | 253 | * the driver's private data |
254 | * | |
255 | * in memory it'll be like this: | |
256 | * | |
a5e1ec53 AA |
257 | * +-------------------------+ |
258 | * | struct wpan_phy | | |
259 | * +-------------------------+ | |
260 | * | struct ieee802154_local | | |
261 | * +-------------------------+ | |
262 | * | driver's private data | | |
263 | * +-------------------------+ | |
1010f540 | 264 | * |
265 | * Due to ieee802154 layer isn't aware of driver and MAC structures, | |
139f14ad | 266 | * so lets align them here. |
1010f540 | 267 | */ |
268 | ||
a5e1ec53 | 269 | priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; |
1010f540 | 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 | ||
a5e1ec53 AA |
277 | local = wpan_phy_priv(phy); |
278 | local->phy = phy; | |
279 | local->hw.phy = local->phy; | |
280 | local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); | |
281 | local->ops = ops; | |
1010f540 | 282 | |
d98be45b AA |
283 | INIT_LIST_HEAD(&local->interfaces); |
284 | mutex_init(&local->iflist_mtx); | |
1010f540 | 285 | |
a5e1ec53 | 286 | return &local->hw; |
1010f540 | 287 | } |
5a504397 | 288 | EXPORT_SYMBOL(ieee802154_alloc_hw); |
1010f540 | 289 | |
5a504397 | 290 | void ieee802154_free_hw(struct ieee802154_hw *hw) |
1010f540 | 291 | { |
60741361 | 292 | struct ieee802154_local *local = hw_to_local(hw); |
1010f540 | 293 | |
d98be45b | 294 | BUG_ON(!list_empty(&local->interfaces)); |
62610ad2 | 295 | |
d98be45b | 296 | mutex_destroy(&local->iflist_mtx); |
1e9f9545 | 297 | |
a5e1ec53 | 298 | wpan_phy_free(local->phy); |
1010f540 | 299 | } |
5a504397 | 300 | EXPORT_SYMBOL(ieee802154_free_hw); |
1010f540 | 301 | |
5a504397 | 302 | int ieee802154_register_hw(struct ieee802154_hw *hw) |
1010f540 | 303 | { |
60741361 | 304 | struct ieee802154_local *local = hw_to_local(hw); |
640985ec AA |
305 | int rc = -ENOSYS; |
306 | ||
5a504397 | 307 | if (hw->flags & IEEE802154_HW_TXPOWER) { |
a5e1ec53 | 308 | if (!local->ops->set_txpower) |
640985ec AA |
309 | goto out; |
310 | ||
a5e1ec53 | 311 | local->phy->set_txpower = mac802154_set_txpower; |
640985ec AA |
312 | } |
313 | ||
5a504397 | 314 | if (hw->flags & IEEE802154_HW_LBT) { |
a5e1ec53 | 315 | if (!local->ops->set_lbt) |
640985ec AA |
316 | goto out; |
317 | ||
a5e1ec53 | 318 | local->phy->set_lbt = mac802154_set_lbt; |
640985ec AA |
319 | } |
320 | ||
5a504397 | 321 | if (hw->flags & IEEE802154_HW_CCA_MODE) { |
a5e1ec53 | 322 | if (!local->ops->set_cca_mode) |
640985ec AA |
323 | goto out; |
324 | ||
a5e1ec53 | 325 | local->phy->set_cca_mode = mac802154_set_cca_mode; |
640985ec AA |
326 | } |
327 | ||
5a504397 | 328 | if (hw->flags & IEEE802154_HW_CCA_ED_LEVEL) { |
a5e1ec53 | 329 | if (!local->ops->set_cca_ed_level) |
640985ec AA |
330 | goto out; |
331 | ||
a5e1ec53 | 332 | local->phy->set_cca_ed_level = mac802154_set_cca_ed_level; |
640985ec AA |
333 | } |
334 | ||
5a504397 | 335 | if (hw->flags & IEEE802154_HW_CSMA_PARAMS) { |
a5e1ec53 | 336 | if (!local->ops->set_csma_params) |
640985ec AA |
337 | goto out; |
338 | ||
a5e1ec53 | 339 | local->phy->set_csma_params = mac802154_set_csma_params; |
640985ec AA |
340 | } |
341 | ||
5a504397 | 342 | if (hw->flags & IEEE802154_HW_FRAME_RETRIES) { |
a5e1ec53 | 343 | if (!local->ops->set_frame_retries) |
640985ec AA |
344 | goto out; |
345 | ||
a5e1ec53 | 346 | local->phy->set_frame_retries = mac802154_set_frame_retries; |
640985ec | 347 | } |
1010f540 | 348 | |
a5e1ec53 AA |
349 | local->dev_workqueue = |
350 | create_singlethread_workqueue(wpan_phy_name(local->phy)); | |
351 | if (!local->dev_workqueue) { | |
640985ec | 352 | rc = -ENOMEM; |
1010f540 | 353 | goto out; |
640985ec | 354 | } |
1010f540 | 355 | |
a5e1ec53 | 356 | wpan_phy_set_dev(local->phy, local->hw.parent); |
1010f540 | 357 | |
a5e1ec53 AA |
358 | local->phy->add_iface = mac802154_add_iface; |
359 | local->phy->del_iface = mac802154_del_iface; | |
62610ad2 | 360 | |
a5e1ec53 | 361 | rc = wpan_phy_register(local->phy); |
1010f540 | 362 | if (rc < 0) |
363 | goto out_wq; | |
364 | ||
365 | rtnl_lock(); | |
366 | ||
d98be45b | 367 | mutex_lock(&local->iflist_mtx); |
a5e1ec53 | 368 | local->running = MAC802154_DEVICE_RUN; |
d98be45b | 369 | mutex_unlock(&local->iflist_mtx); |
1010f540 | 370 | |
371 | rtnl_unlock(); | |
372 | ||
373 | return 0; | |
374 | ||
375 | out_wq: | |
a5e1ec53 | 376 | destroy_workqueue(local->dev_workqueue); |
1010f540 | 377 | out: |
378 | return rc; | |
379 | } | |
5a504397 | 380 | EXPORT_SYMBOL(ieee802154_register_hw); |
1010f540 | 381 | |
5a504397 | 382 | void ieee802154_unregister_hw(struct ieee802154_hw *hw) |
1010f540 | 383 | { |
60741361 | 384 | struct ieee802154_local *local = hw_to_local(hw); |
036562f9 | 385 | struct ieee802154_sub_if_data *sdata, *next; |
1010f540 | 386 | |
a5e1ec53 AA |
387 | flush_workqueue(local->dev_workqueue); |
388 | destroy_workqueue(local->dev_workqueue); | |
1010f540 | 389 | |
390 | rtnl_lock(); | |
391 | ||
d98be45b | 392 | mutex_lock(&local->iflist_mtx); |
a5e1ec53 | 393 | local->running = MAC802154_DEVICE_STOPPED; |
d98be45b | 394 | mutex_unlock(&local->iflist_mtx); |
1010f540 | 395 | |
d98be45b AA |
396 | list_for_each_entry_safe(sdata, next, &local->interfaces, list) { |
397 | mutex_lock(&sdata->local->iflist_mtx); | |
62610ad2 | 398 | list_del(&sdata->list); |
d98be45b | 399 | mutex_unlock(&sdata->local->iflist_mtx); |
62610ad2 | 400 | |
401 | unregister_netdevice(sdata->dev); | |
402 | } | |
403 | ||
1010f540 | 404 | rtnl_unlock(); |
405 | ||
a5e1ec53 | 406 | wpan_phy_unregister(local->phy); |
1010f540 | 407 | } |
5a504397 | 408 | EXPORT_SYMBOL(ieee802154_unregister_hw); |
1010f540 | 409 | |
410 | MODULE_DESCRIPTION("IEEE 802.15.4 implementation"); | |
411 | MODULE_LICENSE("GPL v2"); |