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1 /*

5 *

6 * This program is free software; you can redistribute it and/or modify

7 * it under the terms of the GNU General Public License version 2 as

8 * published by the Free Software Foundation.

9 */

10

11 #include <net/mac80211.h>

12 #include <linux/module.h>

13 #include <linux/init.h>

14 #include <linux/netdevice.h>

15 #include <linux/types.h>

16 #include <linux/slab.h>

17 #include <linux/skbuff.h>

18 #include <linux/etherdevice.h>

19 #include <linux/if_arp.h>

20 #include <linux/rtnetlink.h>

21 #include <linux/bitmap.h>

22 #include <linux/pm_qos.h>

23 #include <linux/inetdevice.h>

24 #include <net/net_namespace.h>

25 #include <net/cfg80211.h>

26

27 #include "ieee80211_i.h"

28 #include "driver-ops.h"

29 #include "rate.h"

30 #include "mesh.h"

31 #include "wep.h"

32 #include "led.h"

33 #include "cfg.h"

34 #include "debugfs.h"

35

36 static struct lock_class_key ieee80211_rx_skb_queue_class;

37

38 void ieee80211_configure_filter(struct ieee80211_local *local)

39 {

40 u64 mc;

41 unsigned int changed_flags;

42 unsigned int new_flags = 0;

43

44 if (atomic_read(&local->iff_promiscs))

45 new_flags |= FIF_PROMISC_IN_BSS;

46

47 if (atomic_read(&local->iff_allmultis))

48 new_flags |= FIF_ALLMULTI;

49

50 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning))

51 new_flags |= FIF_BCN_PRBRESP_PROMISC;

52

53 if (local->fif_probe_req || local->probe_req_reg)

54 new_flags |= FIF_PROBE_REQ;

55

56 if (local->fif_fcsfail)

57 new_flags |= FIF_FCSFAIL;

58

59 if (local->fif_plcpfail)

60 new_flags |= FIF_PLCPFAIL;

61

62 if (local->fif_control)

63 new_flags |= FIF_CONTROL;

64

65 if (local->fif_other_bss)

66 new_flags |= FIF_OTHER_BSS;

67

68 if (local->fif_pspoll)

69 new_flags |= FIF_PSPOLL;

70

71 spin_lock_bh(&local->filter_lock);

72 changed_flags = local->filter_flags ^ new_flags;

73

74 mc = drv_prepare_multicast(local, &local->mc_list);

75 spin_unlock_bh(&local->filter_lock);

76

77 /* be a bit nasty */

78 new_flags |= (1<<31);

79

80 drv_configure_filter(local, changed_flags, &new_flags, mc);

81

82 WARN_ON(new_flags & (1<<31));

83

84 local->filter_flags = new_flags & ~(1<<31);

85 }

86

87 static void ieee80211_reconfig_filter(struct work_struct *work)

88 {

89 struct ieee80211_local *local =

90 container_of(work, struct ieee80211_local, reconfig_filter);

91

92 ieee80211_configure_filter(local);

93 }

94

95 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)

96 {

97 struct ieee80211_channel *chan;

98 int ret = 0;

99 int power;

100 enum nl80211_channel_type channel_type;

101 u32 offchannel_flag;

102

103 might_sleep();

104

105 /* If this off-channel logic ever changes, ieee80211_on_oper_channel

106 * may need to change as well.

107 */

108 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;

109 if (local->scan_channel) {

110 chan = local->scan_channel;

111 /* If scanning on oper channel, use whatever channel-type

112 * is currently in use.

113 */

114 if (chan == local->oper_channel)

115 channel_type = local->_oper_channel_type;

116 else

117 channel_type = NL80211_CHAN_NO_HT;

118 } else if (local->tmp_channel) {

119 chan = local->tmp_channel;

120 channel_type = local->tmp_channel_type;

121 } else {

122 chan = local->oper_channel;

123 channel_type = local->_oper_channel_type;

124 }

125

126 if (chan != local->oper_channel ||

127 channel_type != local->_oper_channel_type)

128 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;

129 else

130 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;

131

132 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;

133

134 if (offchannel_flag || chan != local->hw.conf.channel ||

135 channel_type != local->hw.conf.channel_type) {

136 local->hw.conf.channel = chan;

137 local->hw.conf.channel_type = channel_type;

138 changed |= IEEE80211_CONF_CHANGE_CHANNEL;

139 }

140

141 if (!conf_is_ht(&local->hw.conf)) {

142 /*

143 * mac80211.h documents that this is only valid

144 * when the channel is set to an HT type, and

145 * that otherwise STATIC is used.

146 */

147 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;

148 } else if (local->hw.conf.smps_mode != local->smps_mode) {

149 local->hw.conf.smps_mode = local->smps_mode;

150 changed |= IEEE80211_CONF_CHANGE_SMPS;

151 }

152

153 if (test_bit(SCAN_SW_SCANNING, &local->scanning) ||

154 test_bit(SCAN_HW_SCANNING, &local->scanning))

155 power = chan->max_power;

156 else

157 power = local->power_constr_level ?

158 (chan->max_power - local->power_constr_level) :

159 chan->max_power;

160

161 if (local->user_power_level >= 0)

162 power = min(power, local->user_power_level);

163

164 if (local->hw.conf.power_level != power) {

165 changed |= IEEE80211_CONF_CHANGE_POWER;

166 local->hw.conf.power_level = power;

167 }

168

169 if (changed && local->open_count) {

170 ret = drv_config(local, changed);

171 /*

172 * Goal:

173 * HW reconfiguration should never fail, the driver has told

174 * us what it can support so it should live up to that promise.

175 *

176 * Current status:

177 * rfkill is not integrated with mac80211 and a

178 * configuration command can thus fail if hardware rfkill

179 * is enabled

180 *

181 * FIXME: integrate rfkill with mac80211 and then add this

182 * WARN_ON() back

183 *

184 */

185 /* WARN_ON(ret); */

186 }

187

188 return ret;

189 }

190

191 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,

192 u32 changed)

193 {

194 struct ieee80211_local *local = sdata->local;

195 static const u8 zero[ETH_ALEN] = { 0 };

196

197 if (!changed)

198 return;

199

200 if (sdata->vif.type == NL80211_IFTYPE_STATION) {

201 /*

202 * While not associated, claim a BSSID of all-zeroes

203 * so that drivers don't do any weird things with the

204 * BSSID at that time.

205 */

206 if (sdata->vif.bss_conf.assoc)

207 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;

208 else

209 sdata->vif.bss_conf.bssid = zero;

210 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)

211 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;

212 else if (sdata->vif.type == NL80211_IFTYPE_AP)

213 sdata->vif.bss_conf.bssid = sdata->vif.addr;

214 else if (sdata->vif.type == NL80211_IFTYPE_WDS)

215 sdata->vif.bss_conf.bssid = NULL;

216 else if (ieee80211_vif_is_mesh(&sdata->vif)) {

217 sdata->vif.bss_conf.bssid = zero;

218 } else {

219 WARN_ON(1);

220 return;

221 }

222

223 switch (sdata->vif.type) {

224 case NL80211_IFTYPE_AP:

225 case NL80211_IFTYPE_ADHOC:

226 case NL80211_IFTYPE_WDS:

227 case NL80211_IFTYPE_MESH_POINT:

228 break;

229 default:

230 /* do not warn to simplify caller in scan.c */

231 changed &= ~BSS_CHANGED_BEACON_ENABLED;

232 if (WARN_ON(changed & BSS_CHANGED_BEACON))

233 return;

234 break;

235 }

236

237 if (changed & BSS_CHANGED_BEACON_ENABLED) {

238 if (local->quiescing || !ieee80211_sdata_running(sdata) ||

239 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) {

240 sdata->vif.bss_conf.enable_beacon = false;

241 } else {

242 /*

243 * Beacon should be enabled, but AP mode must

244 * check whether there is a beacon configured.

245 */

246 switch (sdata->vif.type) {

247 case NL80211_IFTYPE_AP:

248 sdata->vif.bss_conf.enable_beacon =

249 !!sdata->u.ap.beacon;

250 break;

251 case NL80211_IFTYPE_ADHOC:

252 sdata->vif.bss_conf.enable_beacon =

253 !!sdata->u.ibss.presp;

254 break;

255 #ifdef CONFIG_MAC80211_MESH

256 case NL80211_IFTYPE_MESH_POINT:

257 sdata->vif.bss_conf.enable_beacon =

258 !!sdata->u.mesh.mesh_id_len;

259 break;

260 #endif

261 default:

262 /* not reached */

263 WARN_ON(1);

264 break;

265 }

266 }

267 }

268

269 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);

270 }

271

272 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)

273 {

274 sdata->vif.bss_conf.use_cts_prot = false;

275 sdata->vif.bss_conf.use_short_preamble = false;

276 sdata->vif.bss_conf.use_short_slot = false;

277 return BSS_CHANGED_ERP_CTS_PROT |

278 BSS_CHANGED_ERP_PREAMBLE |

279 BSS_CHANGED_ERP_SLOT;

280 }

281

282 static void ieee80211_tasklet_handler(unsigned long data)

283 {

284 struct ieee80211_local *local = (struct ieee80211_local *) data;

285 struct sta_info *sta, *tmp;

286 struct skb_eosp_msg_data *eosp_data;

287 struct sk_buff *skb;

288

289 while ((skb = skb_dequeue(&local->skb_queue)) ||

290 (skb = skb_dequeue(&local->skb_queue_unreliable))) {

291 switch (skb->pkt_type) {

292 case IEEE80211_RX_MSG:

293 /* Clear skb->pkt_type in order to not confuse kernel

294 * netstack. */

295 skb->pkt_type = 0;

296 ieee80211_rx(local_to_hw(local), skb);

297 break;

298 case IEEE80211_TX_STATUS_MSG:

299 skb->pkt_type = 0;

300 ieee80211_tx_status(local_to_hw(local), skb);

301 break;

302 case IEEE80211_EOSP_MSG:

303 eosp_data = (void *)skb->cb;

304 for_each_sta_info(local, eosp_data->sta, sta, tmp) {

305 /* skip wrong virtual interface */

306 if (memcmp(eosp_data->iface,

307 sta->sdata->vif.addr, ETH_ALEN))

308 continue;

309 clear_sta_flag(sta, WLAN_STA_SP);

310 break;

311 }

312 dev_kfree_skb(skb);

313 break;

314 default:

315 WARN(1, "mac80211: Packet is of unknown type %d\n",

316 skb->pkt_type);

317 dev_kfree_skb(skb);

318 break;

319 }

320 }

321 }

322

323 static void ieee80211_restart_work(struct work_struct *work)

324 {

325 struct ieee80211_local *local =

326 container_of(work, struct ieee80211_local, restart_work);

327

328 /* wait for scan work complete */

329 flush_workqueue(local->workqueue);

330

331 mutex_lock(&local->mtx);

332 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||

333 local->sched_scanning,

334 "%s called with hardware scan in progress\n", __func__);

335 mutex_unlock(&local->mtx);

336

337 rtnl_lock();

338 ieee80211_scan_cancel(local);

339 ieee80211_reconfig(local);

340 rtnl_unlock();

341 }

342

343 void ieee80211_restart_hw(struct ieee80211_hw *hw)

344 {

345 struct ieee80211_local *local = hw_to_local(hw);

346

347 trace_api_restart_hw(local);

348

349 wiphy_info(hw->wiphy,

350 "Hardware restart was requested\n");

351

352 /* use this reason, ieee80211_reconfig will unblock it */

353 ieee80211_stop_queues_by_reason(hw,

354 IEEE80211_QUEUE_STOP_REASON_SUSPEND);

355

356 schedule_work(&local->restart_work);

357 }

358 EXPORT_SYMBOL(ieee80211_restart_hw);

359

360 static void ieee80211_recalc_smps_work(struct work_struct *work)

361 {

362 struct ieee80211_local *local =

363 container_of(work, struct ieee80211_local, recalc_smps);

364

365 mutex_lock(&local->iflist_mtx);

366 ieee80211_recalc_smps(local);

367 mutex_unlock(&local->iflist_mtx);

368 }

369

370 #ifdef CONFIG_INET

371 static int ieee80211_ifa_changed(struct notifier_block *nb,

372 unsigned long data, void *arg)

373 {

374 struct in_ifaddr *ifa = arg;

375 struct ieee80211_local *local =

376 container_of(nb, struct ieee80211_local,

377 ifa_notifier);

378 struct net_device *ndev = ifa->ifa_dev->dev;

379 struct wireless_dev *wdev = ndev->ieee80211_ptr;

380 struct in_device *idev;

381 struct ieee80211_sub_if_data *sdata;

382 struct ieee80211_bss_conf *bss_conf;

383 struct ieee80211_if_managed *ifmgd;

384 int c = 0;

385

386 /* Make sure it's our interface that got changed */

387 if (!wdev)

388 return NOTIFY_DONE;

389

390 if (wdev->wiphy != local->hw.wiphy)

391 return NOTIFY_DONE;

392

393 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);

394 bss_conf = &sdata->vif.bss_conf;

395

396 if (!ieee80211_sdata_running(sdata))

397 return NOTIFY_DONE;

398

399 /* ARP filtering is only supported in managed mode */

400 if (sdata->vif.type != NL80211_IFTYPE_STATION)

401 return NOTIFY_DONE;

402

403 idev = __in_dev_get_rtnl(sdata->dev);

404 if (!idev)

405 return NOTIFY_DONE;

406

407 ifmgd = &sdata->u.mgd;

408 mutex_lock(&ifmgd->mtx);

409

410 /* Copy the addresses to the bss_conf list */

411 ifa = idev->ifa_list;

412 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {

413 bss_conf->arp_addr_list[c] = ifa->ifa_address;

414 ifa = ifa->ifa_next;

415 c++;

416 }

417

418 /* If not all addresses fit the list, disable filtering */

419 if (ifa) {

420 sdata->arp_filter_state = false;

421 c = 0;

422 } else {

423 sdata->arp_filter_state = true;

424 }

425 bss_conf->arp_addr_cnt = c;

426

427 /* Configure driver only if associated */

428 if (ifmgd->associated) {

429 bss_conf->arp_filter_enabled = sdata->arp_filter_state;

430 ieee80211_bss_info_change_notify(sdata,

431 BSS_CHANGED_ARP_FILTER);

432 }

433

434 mutex_unlock(&ifmgd->mtx);

435

436 return NOTIFY_DONE;

437 }

438 #endif

439

440 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)

441 {

442 struct ieee80211_local *local =

443 container_of(napi, struct ieee80211_local, napi);

444

445 return local->ops->napi_poll(&local->hw, budget);

446 }

447

448 void ieee80211_napi_schedule(struct ieee80211_hw *hw)

449 {

450 struct ieee80211_local *local = hw_to_local(hw);

451

452 napi_schedule(&local->napi);

453 }

454 EXPORT_SYMBOL(ieee80211_napi_schedule);

455

456 void ieee80211_napi_complete(struct ieee80211_hw *hw)

457 {

458 struct ieee80211_local *local = hw_to_local(hw);

459

460 napi_complete(&local->napi);

461 }

462 EXPORT_SYMBOL(ieee80211_napi_complete);

463

464 /* There isn't a lot of sense in it, but you can transmit anything you like */

465 static const struct ieee80211_txrx_stypes

466 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {

467 [NL80211_IFTYPE_ADHOC] = {

468 .tx = 0xffff,

469 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),

470 },

471 [NL80211_IFTYPE_STATION] = {

472 .tx = 0xffff,

473 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |

474 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),

475 },

476 [NL80211_IFTYPE_AP] = {

477 .tx = 0xffff,

478 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |

479 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |

480 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |

481 BIT(IEEE80211_STYPE_DISASSOC >> 4) |

482 BIT(IEEE80211_STYPE_AUTH >> 4) |

483 BIT(IEEE80211_STYPE_DEAUTH >> 4) |

484 BIT(IEEE80211_STYPE_ACTION >> 4),

485 },

486 [NL80211_IFTYPE_AP_VLAN] = {

487 /* copy AP */

488 .tx = 0xffff,

489 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |

490 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |

491 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |

492 BIT(IEEE80211_STYPE_DISASSOC >> 4) |

493 BIT(IEEE80211_STYPE_AUTH >> 4) |

494 BIT(IEEE80211_STYPE_DEAUTH >> 4) |

495 BIT(IEEE80211_STYPE_ACTION >> 4),

496 },

497 [NL80211_IFTYPE_P2P_CLIENT] = {

498 .tx = 0xffff,

499 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |

500 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),

501 },

502 [NL80211_IFTYPE_P2P_GO] = {

503 .tx = 0xffff,

504 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |

505 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |

506 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |

507 BIT(IEEE80211_STYPE_DISASSOC >> 4) |

508 BIT(IEEE80211_STYPE_AUTH >> 4) |

509 BIT(IEEE80211_STYPE_DEAUTH >> 4) |

510 BIT(IEEE80211_STYPE_ACTION >> 4),

511 },

512 [NL80211_IFTYPE_MESH_POINT] = {

513 .tx = 0xffff,

514 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |

515 BIT(IEEE80211_STYPE_AUTH >> 4) |

516 BIT(IEEE80211_STYPE_DEAUTH >> 4),

517 },

518 };

519

520 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {

521 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |

522 IEEE80211_HT_AMPDU_PARM_DENSITY,

523

524 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |

525 IEEE80211_HT_CAP_MAX_AMSDU |

526 IEEE80211_HT_CAP_SGI_40),

527 .mcs = {

528 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,

529 0xff, 0xff, 0xff, 0xff, 0xff, },

530 },

531 };

532

533 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,

534 const struct ieee80211_ops *ops)

535 {

536 struct ieee80211_local *local;

537 int priv_size, i;

538 struct wiphy *wiphy;

539

540 /* Ensure 32-byte alignment of our private data and hw private data.

541 * We use the wiphy priv data for both our ieee80211_local and for

542 * the driver's private data

543 *

544 * In memory it'll be like this:

545 *

546 * +-------------------------+

547 * | struct wiphy |

548 * +-------------------------+

549 * | struct ieee80211_local |

550 * +-------------------------+

551 * | driver's private data |

552 * +-------------------------+

553 *

554 */

555 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;

556

557 wiphy = wiphy_new(&mac80211_config_ops, priv_size);

558

559 if (!wiphy)

560 return NULL;

561

562 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;

563

564 wiphy->privid = mac80211_wiphy_privid;

565

566 wiphy->flags |= WIPHY_FLAG_NETNS_OK |

567 WIPHY_FLAG_4ADDR_AP |

568 WIPHY_FLAG_4ADDR_STATION |

569 WIPHY_FLAG_REPORTS_OBSS |

570 WIPHY_FLAG_OFFCHAN_TX |

571 WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;

572

573 wiphy->features = NL80211_FEATURE_SK_TX_STATUS |

574 NL80211_FEATURE_HT_IBSS;

575

576 if (!ops->set_key)

577 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;

578

579 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);

580

581 local = wiphy_priv(wiphy);

582

583 local->hw.wiphy = wiphy;

584

585 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);

586

587 BUG_ON(!ops->tx && !ops->tx_frags);

588 BUG_ON(!ops->start);

589 BUG_ON(!ops->stop);

590 BUG_ON(!ops->config);

591 BUG_ON(!ops->add_interface);

592 BUG_ON(!ops->remove_interface);

593 BUG_ON(!ops->configure_filter);

594 local->ops = ops;

595

596 /* set up some defaults */

597 local->hw.queues = 1;

598 local->hw.max_rates = 1;

599 local->hw.max_report_rates = 0;

600 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;

601 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;

602 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;

603 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;

604 local->user_power_level = -1;

605 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;

606 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;

607 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;

608

609 INIT_LIST_HEAD(&local->interfaces);

610

611 __hw_addr_init(&local->mc_list);

612

613 mutex_init(&local->iflist_mtx);

614 mutex_init(&local->mtx);

615

616 mutex_init(&local->key_mtx);

617 spin_lock_init(&local->filter_lock);

618 spin_lock_init(&local->queue_stop_reason_lock);

619

620 /*

621 * The rx_skb_queue is only accessed from tasklets,

622 * but other SKB queues are used from within IRQ

623 * context. Therefore, this one needs a different

624 * locking class so our direct, non-irq-safe use of

625 * the queue's lock doesn't throw lockdep warnings.

626 */

627 skb_queue_head_init_class(&local->rx_skb_queue,

628 &ieee80211_rx_skb_queue_class);

629

630 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);

631

632 ieee80211_work_init(local);

633

634 INIT_WORK(&local->restart_work, ieee80211_restart_work);

635

636 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);

637 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);

638 local->smps_mode = IEEE80211_SMPS_OFF;

639

640 INIT_WORK(&local->dynamic_ps_enable_work,

641 ieee80211_dynamic_ps_enable_work);

642 INIT_WORK(&local->dynamic_ps_disable_work,

643 ieee80211_dynamic_ps_disable_work);

644 setup_timer(&local->dynamic_ps_timer,

645 ieee80211_dynamic_ps_timer, (unsigned long) local);

646

647 INIT_WORK(&local->sched_scan_stopped_work,

648 ieee80211_sched_scan_stopped_work);

649

650 spin_lock_init(&local->ack_status_lock);

651 idr_init(&local->ack_status_frames);

652 /* preallocate at least one entry */

653 idr_pre_get(&local->ack_status_frames, GFP_KERNEL);

654

655 sta_info_init(local);

656

657 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {

658 skb_queue_head_init(&local->pending[i]);

659 atomic_set(&local->agg_queue_stop[i], 0);

660 }

661 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,

662 (unsigned long)local);

663

664 tasklet_init(&local->tasklet,

665 ieee80211_tasklet_handler,

666 (unsigned long) local);

667

668 skb_queue_head_init(&local->skb_queue);

669 skb_queue_head_init(&local->skb_queue_unreliable);

670

671 /* init dummy netdev for use w/ NAPI */

672 init_dummy_netdev(&local->napi_dev);

673

674 ieee80211_led_names(local);

675

676 ieee80211_hw_roc_setup(local);

677

678 return local_to_hw(local);

679 }

680 EXPORT_SYMBOL(ieee80211_alloc_hw);

681

682 int ieee80211_register_hw(struct ieee80211_hw *hw)

683 {

684 struct ieee80211_local *local = hw_to_local(hw);

685 int result, i;

686 enum ieee80211_band band;

687 int channels, max_bitrates;

688 bool supp_ht;

689 static const u32 cipher_suites[] = {

690 /* keep WEP first, it may be removed below */

691 WLAN_CIPHER_SUITE_WEP40,

692 WLAN_CIPHER_SUITE_WEP104,

693 WLAN_CIPHER_SUITE_TKIP,

694 WLAN_CIPHER_SUITE_CCMP,

695

696 /* keep last -- depends on hw flags! */

697 WLAN_CIPHER_SUITE_AES_CMAC

698 };

699

700 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns)

701 #ifdef CONFIG_PM

702 && (!local->ops->suspend || !local->ops->resume)

703 #endif

704 )

705 return -EINVAL;

706

707 if (hw->max_report_rates == 0)

708 hw->max_report_rates = hw->max_rates;

709

710 /*

711 * generic code guarantees at least one band,

712 * set this very early because much code assumes

713 * that hw.conf.channel is assigned

714 */

715 channels = 0;

716 max_bitrates = 0;

717 supp_ht = false;

718 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {

719 struct ieee80211_supported_band *sband;

720

721 sband = local->hw.wiphy->bands[band];

722 if (!sband)

723 continue;

724 if (!local->oper_channel) {

725 /* init channel we're on */

726 local->hw.conf.channel =

727 local->oper_channel = &sband->channels[0];

728 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;

729 }

730 channels += sband->n_channels;

731

732 if (max_bitrates < sband->n_bitrates)

733 max_bitrates = sband->n_bitrates;

734 supp_ht = supp_ht || sband->ht_cap.ht_supported;

735 }

736

737 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +

738 sizeof(void *) * channels, GFP_KERNEL);

739 if (!local->int_scan_req)

740 return -ENOMEM;

741

742 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {

743 if (!local->hw.wiphy->bands[band])

744 continue;

745 local->int_scan_req->rates[band] = (u32) -1;

746 }

747

748 /* if low-level driver supports AP, we also support VLAN */

749 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {

750 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);

751 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);

752 }

753

754 /* mac80211 always supports monitor */

755 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);

756 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);

757

758 /*

759 * mac80211 doesn't support more than 1 channel, and also not more

760 * than one IBSS interface

761 */

762 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {

763 const struct ieee80211_iface_combination *c;

764 int j;

765

766 c = &hw->wiphy->iface_combinations[i];

767

768 if (c->num_different_channels > 1)

769 return -EINVAL;

770

771 for (j = 0; j < c->n_limits; j++)

772 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&

773 c->limits[j].max > 1)

774 return -EINVAL;

775 }

776

777 #ifndef CONFIG_MAC80211_MESH

778 /* mesh depends on Kconfig, but drivers should set it if they want */

779 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);

780 #endif

781

782 /* if the underlying driver supports mesh, mac80211 will (at least)

783 * provide routing of mesh authentication frames to userspace */

784 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))

785 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;

786

787 /* mac80211 supports control port protocol changing */

788 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;

789

790 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)

791 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;

792 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)

793 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;

794

795 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)

796 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),

797 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");

798

799 /*

800 * Calculate scan IE length -- we need this to alloc

801 * memory and to subtract from the driver limit. It

802 * includes the DS Params, (extended) supported rates, and HT

803 * information -- SSID is the driver's responsibility.

804 */

805 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +

806 3 /* DS Params */;

807 if (supp_ht)

808 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);

809

810 if (!local->ops->hw_scan) {

811 /* For hw_scan, driver needs to set these up. */

812 local->hw.wiphy->max_scan_ssids = 4;

813 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;

814 }

815

816 /*

817 * If the driver supports any scan IEs, then assume the

818 * limit includes the IEs mac80211 will add, otherwise

819 * leave it at zero and let the driver sort it out; we

820 * still pass our IEs to the driver but userspace will

821 * not be allowed to in that case.

822 */

823 if (local->hw.wiphy->max_scan_ie_len)

824 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;

825

826 /* Set up cipher suites unless driver already did */

827 if (!local->hw.wiphy->cipher_suites) {

828 local->hw.wiphy->cipher_suites = cipher_suites;

829 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);

830 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))

831 local->hw.wiphy->n_cipher_suites--;

832 }

833 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {

834 if (local->hw.wiphy->cipher_suites == cipher_suites) {

835 local->hw.wiphy->cipher_suites += 2;

836 local->hw.wiphy->n_cipher_suites -= 2;

837 } else {

838 u32 *suites;

839 int r, w = 0;

840

841 /* Filter out WEP */

842

843 suites = kmemdup(

844 local->hw.wiphy->cipher_suites,

845 sizeof(u32) * local->hw.wiphy->n_cipher_suites,

846 GFP_KERNEL);

847 if (!suites)

848 return -ENOMEM;

849 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {

850 u32 suite = local->hw.wiphy->cipher_suites[r];

851 if (suite == WLAN_CIPHER_SUITE_WEP40 ||

852 suite == WLAN_CIPHER_SUITE_WEP104)

853 continue;

854 suites[w++] = suite;

855 }

856 local->hw.wiphy->cipher_suites = suites;

857 local->hw.wiphy->n_cipher_suites = w;

858 local->wiphy_ciphers_allocated = true;

859 }

860 }

861

862 if (!local->ops->remain_on_channel)

863 local->hw.wiphy->max_remain_on_channel_duration = 5000;

864

865 if (local->ops->sched_scan_start)

866 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;

867

868 /* mac80211 based drivers don't support internal TDLS setup */

869 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)

870 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;

871

872 result = wiphy_register(local->hw.wiphy);

873 if (result < 0)

874 goto fail_wiphy_register;

875

876 /*

877 * We use the number of queues for feature tests (QoS, HT) internally

878 * so restrict them appropriately.

879 */

880 if (hw->queues > IEEE80211_MAX_QUEUES)

881 hw->queues = IEEE80211_MAX_QUEUES;

882

883 local->workqueue =

884 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);

885 if (!local->workqueue) {

886 result = -ENOMEM;

887 goto fail_workqueue;

888 }

889

890 /*

891 * The hardware needs headroom for sending the frame,

892 * and we need some headroom for passing the frame to monitor

893 * interfaces, but never both at the same time.

894 */

895 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,

896 IEEE80211_TX_STATUS_HEADROOM);

897

898 debugfs_hw_add(local);

899

900 /*

901 * if the driver doesn't specify a max listen interval we

902 * use 5 which should be a safe default

903 */

904 if (local->hw.max_listen_interval == 0)

905 local->hw.max_listen_interval = 5;

906

907 local->hw.conf.listen_interval = local->hw.max_listen_interval;

908

909 local->dynamic_ps_forced_timeout = -1;

910

911 result = ieee80211_wep_init(local);

912 if (result < 0)

913 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",

914 result);

915

916 rtnl_lock();

917

918 result = ieee80211_init_rate_ctrl_alg(local,

919 hw->rate_control_algorithm);

920 if (result < 0) {

921 wiphy_debug(local->hw.wiphy,

922 "Failed to initialize rate control algorithm\n");

923 goto fail_rate;

924 }

925

926 /* add one default STA interface if supported */

927 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {

928 result = ieee80211_if_add(local, "wlan%d", NULL,

929 NL80211_IFTYPE_STATION, NULL);

930 if (result)

931 wiphy_warn(local->hw.wiphy,

932 "Failed to add default virtual iface\n");

933 }

934

935 rtnl_unlock();

936

937 ieee80211_led_init(local);

938

939 local->network_latency_notifier.notifier_call =

940 ieee80211_max_network_latency;

941 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,

942 &local->network_latency_notifier);

943 if (result) {

944 rtnl_lock();

945 goto fail_pm_qos;

946 }

947

948 #ifdef CONFIG_INET

949 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;

950 result = register_inetaddr_notifier(&local->ifa_notifier);

951 if (result)

952 goto fail_ifa;

953 #endif

954

955 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,

956 local->hw.napi_weight);

957

958 return 0;

959

960 #ifdef CONFIG_INET

961 fail_ifa:

962 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,

963 &local->network_latency_notifier);

964 rtnl_lock();

965 #endif

966 fail_pm_qos:

967 ieee80211_led_exit(local);

968 ieee80211_remove_interfaces(local);

969 fail_rate:

970 rtnl_unlock();

971 ieee80211_wep_free(local);

972 sta_info_stop(local);

973 destroy_workqueue(local->workqueue);

974 fail_workqueue:

975 wiphy_unregister(local->hw.wiphy);

976 fail_wiphy_register:

977 if (local->wiphy_ciphers_allocated)

978 kfree(local->hw.wiphy->cipher_suites);

979 kfree(local->int_scan_req);

980 return result;

981 }

982 EXPORT_SYMBOL(ieee80211_register_hw);

983

984 void ieee80211_unregister_hw(struct ieee80211_hw *hw)

985 {

986 struct ieee80211_local *local = hw_to_local(hw);

987

988 tasklet_kill(&local->tx_pending_tasklet);

989 tasklet_kill(&local->tasklet);

990

991 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,

992 &local->network_latency_notifier);

993 #ifdef CONFIG_INET

994 unregister_inetaddr_notifier(&local->ifa_notifier);

995 #endif

996

997 rtnl_lock();

998

999 /*

1000 * At this point, interface list manipulations are fine

1001 * because the driver cannot be handing us frames any

1002 * more and the tasklet is killed.

1003 */

1004 ieee80211_remove_interfaces(local);

1005

1006 rtnl_unlock();

1007

1008 /*

1009 * Now all work items will be gone, but the

1010 * timer might still be armed, so delete it

1011 */

1012 del_timer_sync(&local->work_timer);

1013

1014 cancel_work_sync(&local->restart_work);

1015 cancel_work_sync(&local->reconfig_filter);

1016

1017 ieee80211_clear_tx_pending(local);

1018 rate_control_deinitialize(local);

1019

1020 if (skb_queue_len(&local->skb_queue) ||

1021 skb_queue_len(&local->skb_queue_unreliable))

1022 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");

1023 skb_queue_purge(&local->skb_queue);

1024 skb_queue_purge(&local->skb_queue_unreliable);

1025 skb_queue_purge(&local->rx_skb_queue);

1026

1027 destroy_workqueue(local->workqueue);

1028 wiphy_unregister(local->hw.wiphy);

1029 sta_info_stop(local);

1030 ieee80211_wep_free(local);

1031 ieee80211_led_exit(local);

1032 kfree(local->int_scan_req);

1033 }

1034 EXPORT_SYMBOL(ieee80211_unregister_hw);

1035

1036 static int ieee80211_free_ack_frame(int id, void *p, void *data)

1037 {

1038 WARN_ONCE(1, "Have pending ack frames!\n");

1039 kfree_skb(p);

1040 return 0;

1041 }

1042

1043 void ieee80211_free_hw(struct ieee80211_hw *hw)

1044 {

1045 struct ieee80211_local *local = hw_to_local(hw);

1046

1047 mutex_destroy(&local->iflist_mtx);

1048 mutex_destroy(&local->mtx);

1049

1050 if (local->wiphy_ciphers_allocated)

1051 kfree(local->hw.wiphy->cipher_suites);

1052

1053 idr_for_each(&local->ack_status_frames,

1054 ieee80211_free_ack_frame, NULL);

1055 idr_destroy(&local->ack_status_frames);

1056

1057 wiphy_free(local->hw.wiphy);

1058 }

1059 EXPORT_SYMBOL(ieee80211_free_hw);

1060

1061 static int __init ieee80211_init(void)

1062 {

1063 struct sk_buff *skb;

1064 int ret;

1065

1066 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));

1067 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +

1068 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));

1069

1070 ret = rc80211_minstrel_init();

1071 if (ret)

1072 return ret;

1073

1074 ret = rc80211_minstrel_ht_init();

1075 if (ret)

1076 goto err_minstrel;

1077

1078 ret = rc80211_pid_init();

1079 if (ret)

1080 goto err_pid;

1081

1082 ret = ieee80211_iface_init();

1083 if (ret)

1084 goto err_netdev;

1085

1086 return 0;

1087 err_netdev:

1088 rc80211_pid_exit();

1089 err_pid:

1090 rc80211_minstrel_ht_exit();

1091 err_minstrel:

1092 rc80211_minstrel_exit();

1093

1094 return ret;

1095 }

1096

1097 static void __exit ieee80211_exit(void)

1098 {

1099 rc80211_pid_exit();

1100 rc80211_minstrel_ht_exit();

1101 rc80211_minstrel_exit();

1102

1103 if (mesh_allocated)

1104 ieee80211s_stop();

1105

1106 ieee80211_iface_exit();

1107

1108 rcu_barrier();

1109 }

1110

1111

1112 subsys_initcall(ieee80211_init);

1113 module_exit(ieee80211_exit);

1114

1115 MODULE_DESCRIPTION("IEEE 802.11 subsystem");

1116 MODULE_LICENSE("GPL");