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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / net / wireless / iwlwifi / iwl-mac80211.c
blob4fd5199e89a87713dbbb04c6349045c1c42081b4
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/dma-mapping.h>
34 #include <linux/delay.h>
35 #include <linux/sched.h>
36 #include <linux/skbuff.h>
37 #include <linux/netdevice.h>
38 #include <linux/firmware.h>
39 #include <linux/etherdevice.h>
40 #include <linux/if_arp.h>
41
42 #include <net/mac80211.h>
43
44 #include <asm/div64.h>
45
46 #include "iwl-eeprom.h"
47 #include "iwl-wifi.h"
48 #include "iwl-dev.h"
49 #include "iwl-core.h"
50 #include "iwl-io.h"
51 #include "iwl-agn-calib.h"
52 #include "iwl-agn.h"
53 #include "iwl-shared.h"
54 #include "iwl-bus.h"
55 #include "iwl-trans.h"
56
57 /*****************************************************************************
58 *
59 * mac80211 entry point functions
60 *
61 *****************************************************************************/
62
63 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
64 {
65 .max = 1,
66 .types = BIT(NL80211_IFTYPE_STATION),
67 },
68 {
69 .max = 1,
70 .types = BIT(NL80211_IFTYPE_AP),
71 },
72 };
73
74 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
75 {
76 .max = 2,
77 .types = BIT(NL80211_IFTYPE_STATION),
78 },
79 };
80
81 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
82 {
83 .max = 1,
84 .types = BIT(NL80211_IFTYPE_STATION),
85 },
86 {
87 .max = 1,
88 .types = BIT(NL80211_IFTYPE_P2P_GO) |
89 BIT(NL80211_IFTYPE_AP),
90 },
91 };
92
93 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
94 {
95 .max = 2,
96 .types = BIT(NL80211_IFTYPE_STATION),
97 },
98 {
99 .max = 1,
100 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
101 },
102 };
103
104 static const struct ieee80211_iface_combination
105 iwlagn_iface_combinations_dualmode[] = {
106 { .num_different_channels = 1,
107 .max_interfaces = 2,
108 .beacon_int_infra_match = true,
109 .limits = iwlagn_sta_ap_limits,
110 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
111 },
112 { .num_different_channels = 1,
113 .max_interfaces = 2,
114 .limits = iwlagn_2sta_limits,
115 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
116 },
117 };
118
119 static const struct ieee80211_iface_combination
120 iwlagn_iface_combinations_p2p[] = {
121 { .num_different_channels = 1,
122 .max_interfaces = 2,
123 .beacon_int_infra_match = true,
124 .limits = iwlagn_p2p_sta_go_limits,
125 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
126 },
127 { .num_different_channels = 1,
128 .max_interfaces = 2,
129 .limits = iwlagn_p2p_2sta_limits,
130 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
131 },
132 };
133
134 /*
135 * Not a mac80211 entry point function, but it fits in with all the
136 * other mac80211 functions grouped here.
137 */
138 int iwlagn_mac_setup_register(struct iwl_priv *priv,
139 struct iwlagn_ucode_capabilities *capa)
140 {
141 int ret;
142 struct ieee80211_hw *hw = priv->hw;
143 struct iwl_rxon_context *ctx;
144
145 hw->rate_control_algorithm = "iwl-agn-rs";
146
147 /* Tell mac80211 our characteristics */
148 hw->flags = IEEE80211_HW_SIGNAL_DBM |
149 IEEE80211_HW_AMPDU_AGGREGATION |
150 IEEE80211_HW_NEED_DTIM_PERIOD |
151 IEEE80211_HW_SPECTRUM_MGMT |
152 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
153
154 /*
155 * Including the following line will crash some AP's. This
156 * workaround removes the stimulus which causes the crash until
157 * the AP software can be fixed.
158 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
159 */
160
161 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
162 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
163
164 if (cfg(priv)->sku & EEPROM_SKU_CAP_11N_ENABLE)
165 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
166 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
167
168 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
169 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
170
171 hw->sta_data_size = sizeof(struct iwl_station_priv);
172 hw->vif_data_size = sizeof(struct iwl_vif_priv);
173
174 for_each_context(priv, ctx) {
175 hw->wiphy->interface_modes |= ctx->interface_modes;
176 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
177 }
178
179 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
180
181 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
182 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
183 hw->wiphy->n_iface_combinations =
184 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
185 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
186 hw->wiphy->iface_combinations =
187 iwlagn_iface_combinations_dualmode;
188 hw->wiphy->n_iface_combinations =
189 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
190 }
191
192 hw->wiphy->max_remain_on_channel_duration = 1000;
193
194 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
195 WIPHY_FLAG_DISABLE_BEACON_HINTS |
196 WIPHY_FLAG_IBSS_RSN;
197
198 if (trans(priv)->ucode_wowlan.code.len &&
199 device_can_wakeup(bus(priv)->dev)) {
200 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
201 WIPHY_WOWLAN_DISCONNECT |
202 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
203 WIPHY_WOWLAN_RFKILL_RELEASE;
204 if (!iwlagn_mod_params.sw_crypto)
205 hw->wiphy->wowlan.flags |=
206 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
207 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
208
209 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
210 hw->wiphy->wowlan.pattern_min_len =
211 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
212 hw->wiphy->wowlan.pattern_max_len =
213 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
214 }
215
216 if (iwlagn_mod_params.power_save)
217 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
218 else
219 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
220
221 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
222 /* we create the 802.11 header and a zero-length SSID element */
223 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
224
225 /* Default value; 4 EDCA QOS priorities */
226 hw->queues = 4;
227
228 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
229
230 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
231 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
232 &priv->bands[IEEE80211_BAND_2GHZ];
233 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
234 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
235 &priv->bands[IEEE80211_BAND_5GHZ];
236
237 hw->wiphy->hw_version = bus_get_hw_id(bus(priv));
238
239 iwl_leds_init(priv);
240
241 ret = ieee80211_register_hw(priv->hw);
242 if (ret) {
243 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
244 return ret;
245 }
246 priv->mac80211_registered = 1;
247
248 return 0;
249 }
250
251 void iwlagn_mac_unregister(struct iwl_priv *priv)
252 {
253 if (!priv->mac80211_registered)
254 return;
255 iwl_leds_exit(priv);
256 ieee80211_unregister_hw(priv->hw);
257 priv->mac80211_registered = 0;
258 }
259
260 static int __iwl_up(struct iwl_priv *priv)
261 {
262 struct iwl_rxon_context *ctx;
263 int ret;
264
265 lockdep_assert_held(&priv->shrd->mutex);
266
267 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
268 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
269 return -EIO;
270 }
271
272 for_each_context(priv, ctx) {
273 ret = iwlagn_alloc_bcast_station(priv, ctx);
274 if (ret) {
275 iwl_dealloc_bcast_stations(priv);
276 return ret;
277 }
278 }
279
280 ret = iwl_run_init_ucode(trans(priv));
281 if (ret) {
282 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
283 goto error;
284 }
285
286 ret = iwl_load_ucode_wait_alive(trans(priv), IWL_UCODE_REGULAR);
287 if (ret) {
288 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
289 goto error;
290 }
291
292 ret = iwl_alive_start(priv);
293 if (ret)
294 goto error;
295 return 0;
296
297 error:
298 set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
299 __iwl_down(priv);
300 clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
301
302 IWL_ERR(priv, "Unable to initialize device.\n");
303 return ret;
304 }
305
306 static int iwlagn_mac_start(struct ieee80211_hw *hw)
307 {
308 struct iwl_priv *priv = hw->priv;
309 int ret;
310
311 IWL_DEBUG_MAC80211(priv, "enter\n");
312
313 /* we should be verifying the device is ready to be opened */
314 mutex_lock(&priv->shrd->mutex);
315 ret = __iwl_up(priv);
316 mutex_unlock(&priv->shrd->mutex);
317 if (ret)
318 return ret;
319
320 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
321
322 /* Now we should be done, and the READY bit should be set. */
323 if (WARN_ON(!test_bit(STATUS_READY, &priv->shrd->status)))
324 ret = -EIO;
325
326 iwlagn_led_enable(priv);
327
328 priv->is_open = 1;
329 IWL_DEBUG_MAC80211(priv, "leave\n");
330 return 0;
331 }
332
333 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
334 {
335 struct iwl_priv *priv = hw->priv;
336
337 IWL_DEBUG_MAC80211(priv, "enter\n");
338
339 if (!priv->is_open)
340 return;
341
342 priv->is_open = 0;
343
344 iwl_down(priv);
345
346 flush_workqueue(priv->shrd->workqueue);
347
348 /* User space software may expect getting rfkill changes
349 * even if interface is down */
350 iwl_write32(bus(priv), CSR_INT, 0xFFFFFFFF);
351 iwl_enable_rfkill_int(priv);
352
353 IWL_DEBUG_MAC80211(priv, "leave\n");
354 }
355
356 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
357 struct ieee80211_vif *vif,
358 struct cfg80211_gtk_rekey_data *data)
359 {
360 struct iwl_priv *priv = hw->priv;
361
362 if (iwlagn_mod_params.sw_crypto)
363 return;
364
365 IWL_DEBUG_MAC80211(priv, "enter\n");
366 mutex_lock(&priv->shrd->mutex);
367
368 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
369 goto out;
370
371 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
372 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
373 priv->replay_ctr =
374 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
375 priv->have_rekey_data = true;
376
377 out:
378 mutex_unlock(&priv->shrd->mutex);
379 IWL_DEBUG_MAC80211(priv, "leave\n");
380 }
381
382 #ifdef CONFIG_PM_SLEEP
383
384 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
385 struct cfg80211_wowlan *wowlan)
386 {
387 struct iwl_priv *priv = hw->priv;
388 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
389 int ret;
390
391 if (WARN_ON(!wowlan))
392 return -EINVAL;
393
394 IWL_DEBUG_MAC80211(priv, "enter\n");
395 mutex_lock(&priv->shrd->mutex);
396
397 /* Don't attempt WoWLAN when not associated, tear down instead. */
398 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
399 !iwl_is_associated_ctx(ctx)) {
400 ret = 1;
401 goto out;
402 }
403
404 ret = iwlagn_suspend(priv, hw, wowlan);
405 if (ret)
406 goto error;
407
408 device_set_wakeup_enable(bus(priv)->dev, true);
409
410 /* Now let the ucode operate on its own */
411 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
412 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
413
414 goto out;
415
416 error:
417 priv->shrd->wowlan = false;
418 iwlagn_prepare_restart(priv);
419 ieee80211_restart_hw(priv->hw);
420 out:
421 mutex_unlock(&priv->shrd->mutex);
422 IWL_DEBUG_MAC80211(priv, "leave\n");
423
424 return ret;
425 }
426
427 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
428 {
429 struct iwl_priv *priv = hw->priv;
430 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
431 struct ieee80211_vif *vif;
432 unsigned long flags;
433 u32 base, status = 0xffffffff;
434 int ret = -EIO;
435
436 IWL_DEBUG_MAC80211(priv, "enter\n");
437 mutex_lock(&priv->shrd->mutex);
438
439 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
440 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
441
442 base = priv->shrd->device_pointers.error_event_table;
443 if (iwlagn_hw_valid_rtc_data_addr(base)) {
444 spin_lock_irqsave(&bus(priv)->reg_lock, flags);
445 ret = iwl_grab_nic_access_silent(bus(priv));
446 if (ret == 0) {
447 iwl_write32(bus(priv), HBUS_TARG_MEM_RADDR, base);
448 status = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
449 iwl_release_nic_access(bus(priv));
450 }
451 spin_unlock_irqrestore(&bus(priv)->reg_lock, flags);
452
453 #ifdef CONFIG_IWLWIFI_DEBUGFS
454 if (ret == 0) {
455 struct iwl_trans *trans = trans(priv);
456 if (!priv->wowlan_sram)
457 priv->wowlan_sram =
458 kzalloc(trans->ucode_wowlan.data.len,
459 GFP_KERNEL);
460
461 if (priv->wowlan_sram)
462 _iwl_read_targ_mem_words(
463 bus(priv), 0x800000, priv->wowlan_sram,
464 trans->ucode_wowlan.data.len / 4);
465 }
466 #endif
467 }
468
469 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
470 vif = ctx->vif;
471
472 priv->shrd->wowlan = false;
473
474 device_set_wakeup_enable(bus(priv)->dev, false);
475
476 iwlagn_prepare_restart(priv);
477
478 memset((void *)&ctx->active, 0, sizeof(ctx->active));
479 iwl_connection_init_rx_config(priv, ctx);
480 iwlagn_set_rxon_chain(priv, ctx);
481
482 mutex_unlock(&priv->shrd->mutex);
483 IWL_DEBUG_MAC80211(priv, "leave\n");
484
485 ieee80211_resume_disconnect(vif);
486
487 return 1;
488 }
489
490 #endif
491
492 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
493 {
494 struct iwl_priv *priv = hw->priv;
495
496 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
497 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
498
499 if (iwlagn_tx_skb(priv, skb))
500 dev_kfree_skb_any(skb);
501 }
502
503 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
504 struct ieee80211_vif *vif,
505 struct ieee80211_key_conf *keyconf,
506 struct ieee80211_sta *sta,
507 u32 iv32, u16 *phase1key)
508 {
509 struct iwl_priv *priv = hw->priv;
510
511 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
512 }
513
514 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
515 struct ieee80211_vif *vif,
516 struct ieee80211_sta *sta,
517 struct ieee80211_key_conf *key)
518 {
519 struct iwl_priv *priv = hw->priv;
520 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
521 struct iwl_rxon_context *ctx = vif_priv->ctx;
522 int ret;
523 bool is_default_wep_key = false;
524
525 IWL_DEBUG_MAC80211(priv, "enter\n");
526
527 if (iwlagn_mod_params.sw_crypto) {
528 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
529 return -EOPNOTSUPP;
530 }
531
532 switch (key->cipher) {
533 case WLAN_CIPHER_SUITE_TKIP:
534 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
535 /* fall through */
536 case WLAN_CIPHER_SUITE_CCMP:
537 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
538 break;
539 default:
540 break;
541 }
542
543 /*
544 * We could program these keys into the hardware as well, but we
545 * don't expect much multicast traffic in IBSS and having keys
546 * for more stations is probably more useful.
547 *
548 * Mark key TX-only and return 0.
549 */
550 if (vif->type == NL80211_IFTYPE_ADHOC &&
551 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
552 key->hw_key_idx = WEP_INVALID_OFFSET;
553 return 0;
554 }
555
556 /* If they key was TX-only, accept deletion */
557 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
558 return 0;
559
560 mutex_lock(&priv->shrd->mutex);
561 iwl_scan_cancel_timeout(priv, 100);
562
563 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
564
565 /*
566 * If we are getting WEP group key and we didn't receive any key mapping
567 * so far, we are in legacy wep mode (group key only), otherwise we are
568 * in 1X mode.
569 * In legacy wep mode, we use another host command to the uCode.
570 */
571 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
572 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
573 if (cmd == SET_KEY)
574 is_default_wep_key = !ctx->key_mapping_keys;
575 else
576 is_default_wep_key =
577 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
578 }
579
580
581 switch (cmd) {
582 case SET_KEY:
583 if (is_default_wep_key) {
584 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
585 break;
586 }
587 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
588 if (ret) {
589 /*
590 * can't add key for RX, but we don't need it
591 * in the device for TX so still return 0
592 */
593 ret = 0;
594 key->hw_key_idx = WEP_INVALID_OFFSET;
595 }
596
597 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
598 break;
599 case DISABLE_KEY:
600 if (is_default_wep_key)
601 ret = iwl_remove_default_wep_key(priv, ctx, key);
602 else
603 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
604
605 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
606 break;
607 default:
608 ret = -EINVAL;
609 }
610
611 mutex_unlock(&priv->shrd->mutex);
612 IWL_DEBUG_MAC80211(priv, "leave\n");
613
614 return ret;
615 }
616
617 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
618 struct ieee80211_vif *vif,
619 enum ieee80211_ampdu_mlme_action action,
620 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
621 u8 buf_size)
622 {
623 struct iwl_priv *priv = hw->priv;
624 int ret = -EINVAL;
625 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
626
627 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
628 sta->addr, tid);
629
630 if (!(cfg(priv)->sku & EEPROM_SKU_CAP_11N_ENABLE))
631 return -EACCES;
632
633 IWL_DEBUG_MAC80211(priv, "enter\n");
634 mutex_lock(&priv->shrd->mutex);
635
636 switch (action) {
637 case IEEE80211_AMPDU_RX_START:
638 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
639 break;
640 IWL_DEBUG_HT(priv, "start Rx\n");
641 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
642 break;
643 case IEEE80211_AMPDU_RX_STOP:
644 IWL_DEBUG_HT(priv, "stop Rx\n");
645 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
646 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
647 ret = 0;
648 break;
649 case IEEE80211_AMPDU_TX_START:
650 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
651 break;
652 IWL_DEBUG_HT(priv, "start Tx\n");
653 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
654 break;
655 case IEEE80211_AMPDU_TX_STOP:
656 IWL_DEBUG_HT(priv, "stop Tx\n");
657 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
658 if ((ret == 0) && (priv->agg_tids_count > 0)) {
659 priv->agg_tids_count--;
660 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
661 priv->agg_tids_count);
662 }
663 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
664 ret = 0;
665 if (!priv->agg_tids_count && cfg(priv)->ht_params &&
666 cfg(priv)->ht_params->use_rts_for_aggregation) {
667 /*
668 * switch off RTS/CTS if it was previously enabled
669 */
670 sta_priv->lq_sta.lq.general_params.flags &=
671 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
672 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
673 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
674 }
675 break;
676 case IEEE80211_AMPDU_TX_OPERATIONAL:
677 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
678 break;
679 }
680 mutex_unlock(&priv->shrd->mutex);
681 IWL_DEBUG_MAC80211(priv, "leave\n");
682 return ret;
683 }
684
685 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
686 struct ieee80211_vif *vif,
687 struct ieee80211_sta *sta)
688 {
689 struct iwl_priv *priv = hw->priv;
690 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
691 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
692 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
693 int ret = 0;
694 u8 sta_id;
695
696 IWL_DEBUG_MAC80211(priv, "received request to add station %pM\n",
697 sta->addr);
698 mutex_lock(&priv->shrd->mutex);
699 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
700 sta->addr);
701 sta_priv->sta_id = IWL_INVALID_STATION;
702
703 atomic_set(&sta_priv->pending_frames, 0);
704 if (vif->type == NL80211_IFTYPE_AP)
705 sta_priv->client = true;
706
707 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
708 is_ap, sta, &sta_id);
709 if (ret) {
710 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
711 sta->addr, ret);
712 /* Should we return success if return code is EEXIST ? */
713 goto out;
714 }
715
716 sta_priv->sta_id = sta_id;
717
718 /* Initialize rate scaling */
719 IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
720 sta->addr);
721 iwl_rs_rate_init(priv, sta, sta_id);
722 out:
723 mutex_unlock(&priv->shrd->mutex);
724 IWL_DEBUG_MAC80211(priv, "leave\n");
725
726 return ret;
727 }
728
729 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
730 struct ieee80211_channel_switch *ch_switch)
731 {
732 struct iwl_priv *priv = hw->priv;
733 const struct iwl_channel_info *ch_info;
734 struct ieee80211_conf *conf = &hw->conf;
735 struct ieee80211_channel *channel = ch_switch->channel;
736 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
737 /*
738 * MULTI-FIXME
739 * When we add support for multiple interfaces, we need to
740 * revisit this. The channel switch command in the device
741 * only affects the BSS context, but what does that really
742 * mean? And what if we get a CSA on the second interface?
743 * This needs a lot of work.
744 */
745 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
746 u16 ch;
747
748 IWL_DEBUG_MAC80211(priv, "enter\n");
749
750 mutex_lock(&priv->shrd->mutex);
751
752 if (iwl_is_rfkill(priv->shrd))
753 goto out;
754
755 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
756 test_bit(STATUS_SCANNING, &priv->shrd->status) ||
757 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
758 goto out;
759
760 if (!iwl_is_associated_ctx(ctx))
761 goto out;
762
763 if (!cfg(priv)->lib->set_channel_switch)
764 goto out;
765
766 ch = channel->hw_value;
767 if (le16_to_cpu(ctx->active.channel) == ch)
768 goto out;
769
770 ch_info = iwl_get_channel_info(priv, channel->band, ch);
771 if (!is_channel_valid(ch_info)) {
772 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
773 goto out;
774 }
775
776 spin_lock_irq(&priv->shrd->lock);
777
778 priv->current_ht_config.smps = conf->smps_mode;
779
780 /* Configure HT40 channels */
781 ctx->ht.enabled = conf_is_ht(conf);
782 if (ctx->ht.enabled)
783 iwlagn_config_ht40(conf, ctx);
784 else
785 ctx->ht.is_40mhz = false;
786
787 if ((le16_to_cpu(ctx->staging.channel) != ch))
788 ctx->staging.flags = 0;
789
790 iwl_set_rxon_channel(priv, channel, ctx);
791 iwl_set_rxon_ht(priv, ht_conf);
792 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
793
794 spin_unlock_irq(&priv->shrd->lock);
795
796 iwl_set_rate(priv);
797 /*
798 * at this point, staging_rxon has the
799 * configuration for channel switch
800 */
801 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
802 priv->switch_channel = cpu_to_le16(ch);
803 if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
804 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
805 priv->switch_channel = 0;
806 ieee80211_chswitch_done(ctx->vif, false);
807 }
808
809 out:
810 mutex_unlock(&priv->shrd->mutex);
811 IWL_DEBUG_MAC80211(priv, "leave\n");
812 }
813
814 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
815 unsigned int changed_flags,
816 unsigned int *total_flags,
817 u64 multicast)
818 {
819 struct iwl_priv *priv = hw->priv;
820 __le32 filter_or = 0, filter_nand = 0;
821 struct iwl_rxon_context *ctx;
822
823 #define CHK(test, flag) do { \
824 if (*total_flags & (test)) \
825 filter_or |= (flag); \
826 else \
827 filter_nand |= (flag); \
828 } while (0)
829
830 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
831 changed_flags, *total_flags);
832
833 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
834 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
835 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
836 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
837
838 #undef CHK
839
840 mutex_lock(&priv->shrd->mutex);
841
842 for_each_context(priv, ctx) {
843 ctx->staging.filter_flags &= ~filter_nand;
844 ctx->staging.filter_flags |= filter_or;
845
846 /*
847 * Not committing directly because hardware can perform a scan,
848 * but we'll eventually commit the filter flags change anyway.
849 */
850 }
851
852 mutex_unlock(&priv->shrd->mutex);
853
854 /*
855 * Receiving all multicast frames is always enabled by the
856 * default flags setup in iwl_connection_init_rx_config()
857 * since we currently do not support programming multicast
858 * filters into the device.
859 */
860 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
861 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
862 }
863
864 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
865 {
866 struct iwl_priv *priv = hw->priv;
867
868 mutex_lock(&priv->shrd->mutex);
869 IWL_DEBUG_MAC80211(priv, "enter\n");
870
871 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
872 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
873 goto done;
874 }
875 if (iwl_is_rfkill(priv->shrd)) {
876 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
877 goto done;
878 }
879
880 /*
881 * mac80211 will not push any more frames for transmit
882 * until the flush is completed
883 */
884 if (drop) {
885 IWL_DEBUG_MAC80211(priv, "send flush command\n");
886 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
887 IWL_ERR(priv, "flush request fail\n");
888 goto done;
889 }
890 }
891 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
892 iwl_trans_wait_tx_queue_empty(trans(priv));
893 done:
894 mutex_unlock(&priv->shrd->mutex);
895 IWL_DEBUG_MAC80211(priv, "leave\n");
896 }
897
898 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
899 struct ieee80211_channel *channel,
900 enum nl80211_channel_type channel_type,
901 int duration)
902 {
903 struct iwl_priv *priv = hw->priv;
904 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
905 int err = 0;
906
907 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
908 return -EOPNOTSUPP;
909
910 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
911 return -EOPNOTSUPP;
912
913 IWL_DEBUG_MAC80211(priv, "enter\n");
914 mutex_lock(&priv->shrd->mutex);
915
916 if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
917 err = -EBUSY;
918 goto out;
919 }
920
921 priv->hw_roc_channel = channel;
922 priv->hw_roc_chantype = channel_type;
923 /* convert from ms to TU */
924 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
925 priv->hw_roc_start_notified = false;
926 cancel_delayed_work(&priv->hw_roc_disable_work);
927
928 if (!ctx->is_active) {
929 static const struct iwl_qos_info default_qos_data = {
930 .def_qos_parm = {
931 .ac[0] = {
932 .cw_min = cpu_to_le16(3),
933 .cw_max = cpu_to_le16(7),
934 .aifsn = 2,
935 .edca_txop = cpu_to_le16(1504),
936 },
937 .ac[1] = {
938 .cw_min = cpu_to_le16(7),
939 .cw_max = cpu_to_le16(15),
940 .aifsn = 2,
941 .edca_txop = cpu_to_le16(3008),
942 },
943 .ac[2] = {
944 .cw_min = cpu_to_le16(15),
945 .cw_max = cpu_to_le16(1023),
946 .aifsn = 3,
947 },
948 .ac[3] = {
949 .cw_min = cpu_to_le16(15),
950 .cw_max = cpu_to_le16(1023),
951 .aifsn = 7,
952 },
953 },
954 };
955
956 ctx->is_active = true;
957 ctx->qos_data = default_qos_data;
958 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
959 memcpy(ctx->staging.node_addr,
960 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
961 ETH_ALEN);
962 memcpy(ctx->staging.bssid_addr,
963 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
964 ETH_ALEN);
965 err = iwlagn_commit_rxon(priv, ctx);
966 if (err)
967 goto out;
968 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
969 RXON_FILTER_PROMISC_MSK |
970 RXON_FILTER_CTL2HOST_MSK;
971
972 err = iwlagn_commit_rxon(priv, ctx);
973 if (err) {
974 iwlagn_disable_roc(priv);
975 goto out;
976 }
977 priv->hw_roc_setup = true;
978 }
979
980 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
981 if (err)
982 iwlagn_disable_roc(priv);
983
984 out:
985 mutex_unlock(&priv->shrd->mutex);
986 IWL_DEBUG_MAC80211(priv, "leave\n");
987
988 return err;
989 }
990
991 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
992 {
993 struct iwl_priv *priv = hw->priv;
994
995 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
996 return -EOPNOTSUPP;
997
998 IWL_DEBUG_MAC80211(priv, "enter\n");
999 mutex_lock(&priv->shrd->mutex);
1000 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1001 iwlagn_disable_roc(priv);
1002 mutex_unlock(&priv->shrd->mutex);
1003 IWL_DEBUG_MAC80211(priv, "leave\n");
1004
1005 return 0;
1006 }
1007
1008 static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
1009 struct ieee80211_vif *vif,
1010 const u8 *bssid,
1011 enum ieee80211_tx_sync_type type)
1012 {
1013 struct iwl_priv *priv = hw->priv;
1014 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1015 struct iwl_rxon_context *ctx = vif_priv->ctx;
1016 int ret;
1017 u8 sta_id;
1018
1019 if (ctx->ctxid != IWL_RXON_CTX_PAN)
1020 return 0;
1021
1022 IWL_DEBUG_MAC80211(priv, "enter\n");
1023 mutex_lock(&priv->shrd->mutex);
1024
1025 if (iwl_is_associated_ctx(ctx)) {
1026 ret = 0;
1027 goto out;
1028 }
1029
1030 if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
1031 &priv->shrd->status)) {
1032 ret = -EBUSY;
1033 goto out;
1034 }
1035
1036 ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
1037 if (ret)
1038 goto out;
1039
1040 if (WARN_ON(sta_id != ctx->ap_sta_id)) {
1041 ret = -EIO;
1042 goto out_remove_sta;
1043 }
1044
1045 memcpy(ctx->bssid, bssid, ETH_ALEN);
1046 ctx->preauth_bssid = true;
1047
1048 ret = iwlagn_commit_rxon(priv, ctx);
1049
1050 if (ret == 0)
1051 goto out;
1052
1053 out_remove_sta:
1054 iwl_remove_station(priv, sta_id, bssid);
1055 out:
1056 mutex_unlock(&priv->shrd->mutex);
1057 IWL_DEBUG_MAC80211(priv, "leave\n");
1058
1059 return ret;
1060 }
1061
1062 static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
1063 struct ieee80211_vif *vif,
1064 const u8 *bssid,
1065 enum ieee80211_tx_sync_type type)
1066 {
1067 struct iwl_priv *priv = hw->priv;
1068 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1069 struct iwl_rxon_context *ctx = vif_priv->ctx;
1070
1071 if (ctx->ctxid != IWL_RXON_CTX_PAN)
1072 return;
1073
1074 IWL_DEBUG_MAC80211(priv, "enter\n");
1075 mutex_lock(&priv->shrd->mutex);
1076
1077 if (iwl_is_associated_ctx(ctx))
1078 goto out;
1079
1080 iwl_remove_station(priv, ctx->ap_sta_id, bssid);
1081 ctx->preauth_bssid = false;
1082 /* no need to commit */
1083 out:
1084 mutex_unlock(&priv->shrd->mutex);
1085 IWL_DEBUG_MAC80211(priv, "leave\n");
1086 }
1087
1088 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1089 enum ieee80211_rssi_event rssi_event)
1090 {
1091 struct iwl_priv *priv = hw->priv;
1092
1093 IWL_DEBUG_MAC80211(priv, "enter\n");
1094 mutex_lock(&priv->shrd->mutex);
1095
1096 if (cfg(priv)->bt_params &&
1097 cfg(priv)->bt_params->advanced_bt_coexist) {
1098 if (rssi_event == RSSI_EVENT_LOW)
1099 priv->bt_enable_pspoll = true;
1100 else if (rssi_event == RSSI_EVENT_HIGH)
1101 priv->bt_enable_pspoll = false;
1102
1103 iwlagn_send_advance_bt_config(priv);
1104 } else {
1105 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1106 "ignoring RSSI callback\n");
1107 }
1108
1109 mutex_unlock(&priv->shrd->mutex);
1110 IWL_DEBUG_MAC80211(priv, "leave\n");
1111 }
1112
1113 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1114 struct ieee80211_sta *sta, bool set)
1115 {
1116 struct iwl_priv *priv = hw->priv;
1117
1118 queue_work(priv->shrd->workqueue, &priv->beacon_update);
1119
1120 return 0;
1121 }
1122
1123 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1124 struct ieee80211_vif *vif, u16 queue,
1125 const struct ieee80211_tx_queue_params *params)
1126 {
1127 struct iwl_priv *priv = hw->priv;
1128 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1129 struct iwl_rxon_context *ctx = vif_priv->ctx;
1130 unsigned long flags;
1131 int q;
1132
1133 if (WARN_ON(!ctx))
1134 return -EINVAL;
1135
1136 IWL_DEBUG_MAC80211(priv, "enter\n");
1137
1138 if (!iwl_is_ready_rf(priv->shrd)) {
1139 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1140 return -EIO;
1141 }
1142
1143 if (queue >= AC_NUM) {
1144 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1145 return 0;
1146 }
1147
1148 q = AC_NUM - 1 - queue;
1149
1150 spin_lock_irqsave(&priv->shrd->lock, flags);
1151
1152 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1153 cpu_to_le16(params->cw_min);
1154 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1155 cpu_to_le16(params->cw_max);
1156 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1157 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1158 cpu_to_le16((params->txop * 32));
1159
1160 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1161
1162 spin_unlock_irqrestore(&priv->shrd->lock, flags);
1163
1164 IWL_DEBUG_MAC80211(priv, "leave\n");
1165 return 0;
1166 }
1167
1168 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1169 {
1170 struct iwl_priv *priv = hw->priv;
1171
1172 return priv->ibss_manager == IWL_IBSS_MANAGER;
1173 }
1174
1175 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1176 {
1177 iwl_connection_init_rx_config(priv, ctx);
1178
1179 iwlagn_set_rxon_chain(priv, ctx);
1180
1181 return iwlagn_commit_rxon(priv, ctx);
1182 }
1183
1184 static int iwl_setup_interface(struct iwl_priv *priv,
1185 struct iwl_rxon_context *ctx)
1186 {
1187 struct ieee80211_vif *vif = ctx->vif;
1188 int err;
1189
1190 lockdep_assert_held(&priv->shrd->mutex);
1191
1192 /*
1193 * This variable will be correct only when there's just
1194 * a single context, but all code using it is for hardware
1195 * that supports only one context.
1196 */
1197 priv->iw_mode = vif->type;
1198
1199 ctx->is_active = true;
1200
1201 err = iwl_set_mode(priv, ctx);
1202 if (err) {
1203 if (!ctx->always_active)
1204 ctx->is_active = false;
1205 return err;
1206 }
1207
1208 if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1209 vif->type == NL80211_IFTYPE_ADHOC) {
1210 /*
1211 * pretend to have high BT traffic as long as we
1212 * are operating in IBSS mode, as this will cause
1213 * the rate scaling etc. to behave as intended.
1214 */
1215 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1216 }
1217
1218 return 0;
1219 }
1220
1221 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1222 struct ieee80211_vif *vif)
1223 {
1224 struct iwl_priv *priv = hw->priv;
1225 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1226 struct iwl_rxon_context *tmp, *ctx = NULL;
1227 int err;
1228 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1229 bool reset = false;
1230
1231 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1232 viftype, vif->addr);
1233
1234 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1235
1236 mutex_lock(&priv->shrd->mutex);
1237
1238 iwlagn_disable_roc(priv);
1239
1240 if (!iwl_is_ready_rf(priv->shrd)) {
1241 IWL_WARN(priv, "Try to add interface when device not ready\n");
1242 err = -EINVAL;
1243 goto out;
1244 }
1245
1246 for_each_context(priv, tmp) {
1247 u32 possible_modes =
1248 tmp->interface_modes | tmp->exclusive_interface_modes;
1249
1250 if (tmp->vif) {
1251 /* On reset we need to add the same interface again */
1252 if (tmp->vif == vif) {
1253 reset = true;
1254 ctx = tmp;
1255 break;
1256 }
1257
1258 /* check if this busy context is exclusive */
1259 if (tmp->exclusive_interface_modes &
1260 BIT(tmp->vif->type)) {
1261 err = -EINVAL;
1262 goto out;
1263 }
1264 continue;
1265 }
1266
1267 if (!(possible_modes & BIT(viftype)))
1268 continue;
1269
1270 /* have maybe usable context w/o interface */
1271 ctx = tmp;
1272 break;
1273 }
1274
1275 if (!ctx) {
1276 err = -EOPNOTSUPP;
1277 goto out;
1278 }
1279
1280 vif_priv->ctx = ctx;
1281 ctx->vif = vif;
1282
1283 err = iwl_setup_interface(priv, ctx);
1284 if (!err || reset)
1285 goto out;
1286
1287 ctx->vif = NULL;
1288 priv->iw_mode = NL80211_IFTYPE_STATION;
1289 out:
1290 mutex_unlock(&priv->shrd->mutex);
1291
1292 IWL_DEBUG_MAC80211(priv, "leave\n");
1293 return err;
1294 }
1295
1296 static void iwl_teardown_interface(struct iwl_priv *priv,
1297 struct ieee80211_vif *vif,
1298 bool mode_change)
1299 {
1300 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1301
1302 lockdep_assert_held(&priv->shrd->mutex);
1303
1304 if (priv->scan_vif == vif) {
1305 iwl_scan_cancel_timeout(priv, 200);
1306 iwl_force_scan_end(priv);
1307 }
1308
1309 if (!mode_change) {
1310 iwl_set_mode(priv, ctx);
1311 if (!ctx->always_active)
1312 ctx->is_active = false;
1313 }
1314
1315 /*
1316 * When removing the IBSS interface, overwrite the
1317 * BT traffic load with the stored one from the last
1318 * notification, if any. If this is a device that
1319 * doesn't implement this, this has no effect since
1320 * both values are the same and zero.
1321 */
1322 if (vif->type == NL80211_IFTYPE_ADHOC)
1323 priv->bt_traffic_load = priv->last_bt_traffic_load;
1324 }
1325
1326 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1327 struct ieee80211_vif *vif)
1328 {
1329 struct iwl_priv *priv = hw->priv;
1330 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1331
1332 IWL_DEBUG_MAC80211(priv, "enter\n");
1333
1334 mutex_lock(&priv->shrd->mutex);
1335
1336 if (WARN_ON(ctx->vif != vif)) {
1337 struct iwl_rxon_context *tmp;
1338 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1339 for_each_context(priv, tmp)
1340 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1341 tmp->ctxid, tmp, tmp->vif);
1342 }
1343 ctx->vif = NULL;
1344
1345 iwl_teardown_interface(priv, vif, false);
1346
1347 mutex_unlock(&priv->shrd->mutex);
1348
1349 IWL_DEBUG_MAC80211(priv, "leave\n");
1350
1351 }
1352
1353 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1354 struct ieee80211_vif *vif,
1355 enum nl80211_iftype newtype, bool newp2p)
1356 {
1357 struct iwl_priv *priv = hw->priv;
1358 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1359 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1360 struct iwl_rxon_context *tmp;
1361 enum nl80211_iftype newviftype = newtype;
1362 u32 interface_modes;
1363 int err;
1364
1365 IWL_DEBUG_MAC80211(priv, "enter\n");
1366
1367 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1368
1369 mutex_lock(&priv->shrd->mutex);
1370
1371 if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1372 /*
1373 * Huh? But wait ... this can maybe happen when
1374 * we're in the middle of a firmware restart!
1375 */
1376 err = -EBUSY;
1377 goto out;
1378 }
1379
1380 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1381
1382 if (!(interface_modes & BIT(newtype))) {
1383 err = -EBUSY;
1384 goto out;
1385 }
1386
1387 /*
1388 * Refuse a change that should be done by moving from the PAN
1389 * context to the BSS context instead, if the BSS context is
1390 * available and can support the new interface type.
1391 */
1392 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1393 (bss_ctx->interface_modes & BIT(newtype) ||
1394 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1395 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1396 err = -EBUSY;
1397 goto out;
1398 }
1399
1400 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1401 for_each_context(priv, tmp) {
1402 if (ctx == tmp)
1403 continue;
1404
1405 if (!tmp->vif)
1406 continue;
1407
1408 /*
1409 * The current mode switch would be exclusive, but
1410 * another context is active ... refuse the switch.
1411 */
1412 err = -EBUSY;
1413 goto out;
1414 }
1415 }
1416
1417 /* success */
1418 iwl_teardown_interface(priv, vif, true);
1419 vif->type = newviftype;
1420 vif->p2p = newp2p;
1421 err = iwl_setup_interface(priv, ctx);
1422 WARN_ON(err);
1423 /*
1424 * We've switched internally, but submitting to the
1425 * device may have failed for some reason. Mask this
1426 * error, because otherwise mac80211 will not switch
1427 * (and set the interface type back) and we'll be
1428 * out of sync with it.
1429 */
1430 err = 0;
1431
1432 out:
1433 mutex_unlock(&priv->shrd->mutex);
1434 IWL_DEBUG_MAC80211(priv, "leave\n");
1435
1436 return err;
1437 }
1438
1439 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1440 struct ieee80211_vif *vif,
1441 struct cfg80211_scan_request *req)
1442 {
1443 struct iwl_priv *priv = hw->priv;
1444 int ret;
1445
1446 IWL_DEBUG_MAC80211(priv, "enter\n");
1447
1448 if (req->n_channels == 0)
1449 return -EINVAL;
1450
1451 mutex_lock(&priv->shrd->mutex);
1452
1453 /*
1454 * If an internal scan is in progress, just set
1455 * up the scan_request as per above.
1456 */
1457 if (priv->scan_type != IWL_SCAN_NORMAL) {
1458 IWL_DEBUG_SCAN(priv,
1459 "SCAN request during internal scan - defer\n");
1460 priv->scan_request = req;
1461 priv->scan_vif = vif;
1462 ret = 0;
1463 } else {
1464 priv->scan_request = req;
1465 priv->scan_vif = vif;
1466 /*
1467 * mac80211 will only ask for one band at a time
1468 * so using channels[0] here is ok
1469 */
1470 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1471 req->channels[0]->band);
1472 if (ret) {
1473 priv->scan_request = NULL;
1474 priv->scan_vif = NULL;
1475 }
1476 }
1477
1478 IWL_DEBUG_MAC80211(priv, "leave\n");
1479
1480 mutex_unlock(&priv->shrd->mutex);
1481
1482 return ret;
1483 }
1484
1485 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
1486 struct ieee80211_vif *vif,
1487 struct ieee80211_sta *sta)
1488 {
1489 struct iwl_priv *priv = hw->priv;
1490 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1491 int ret;
1492
1493 IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
1494 "station %pM\n", sta->addr);
1495 mutex_lock(&priv->shrd->mutex);
1496 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1497 sta->addr);
1498 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
1499 if (ret)
1500 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
1501 sta->addr);
1502 mutex_unlock(&priv->shrd->mutex);
1503 IWL_DEBUG_MAC80211(priv, "leave\n");
1504
1505 return ret;
1506 }
1507
1508 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1509 {
1510 unsigned long flags;
1511
1512 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1513 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1514 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1515 priv->stations[sta_id].sta.sta.modify_mask = 0;
1516 priv->stations[sta_id].sta.sleep_tx_count = 0;
1517 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1518 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1519 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1520
1521 }
1522
1523 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1524 struct ieee80211_vif *vif,
1525 enum sta_notify_cmd cmd,
1526 struct ieee80211_sta *sta)
1527 {
1528 struct iwl_priv *priv = hw->priv;
1529 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1530 int sta_id;
1531
1532 IWL_DEBUG_MAC80211(priv, "enter\n");
1533
1534 switch (cmd) {
1535 case STA_NOTIFY_SLEEP:
1536 WARN_ON(!sta_priv->client);
1537 sta_priv->asleep = true;
1538 if (atomic_read(&sta_priv->pending_frames) > 0)
1539 ieee80211_sta_block_awake(hw, sta, true);
1540 break;
1541 case STA_NOTIFY_AWAKE:
1542 WARN_ON(!sta_priv->client);
1543 if (!sta_priv->asleep)
1544 break;
1545 sta_priv->asleep = false;
1546 sta_id = iwl_sta_id(sta);
1547 if (sta_id != IWL_INVALID_STATION)
1548 iwl_sta_modify_ps_wake(priv, sta_id);
1549 break;
1550 default:
1551 break;
1552 }
1553 IWL_DEBUG_MAC80211(priv, "leave\n");
1554 }
1555
1556 struct ieee80211_ops iwlagn_hw_ops = {
1557 .tx = iwlagn_mac_tx,
1558 .start = iwlagn_mac_start,
1559 .stop = iwlagn_mac_stop,
1560 #ifdef CONFIG_PM_SLEEP
1561 .suspend = iwlagn_mac_suspend,
1562 .resume = iwlagn_mac_resume,
1563 #endif
1564 .add_interface = iwlagn_mac_add_interface,
1565 .remove_interface = iwlagn_mac_remove_interface,
1566 .change_interface = iwlagn_mac_change_interface,
1567 .config = iwlagn_mac_config,
1568 .configure_filter = iwlagn_configure_filter,
1569 .set_key = iwlagn_mac_set_key,
1570 .update_tkip_key = iwlagn_mac_update_tkip_key,
1571 .set_rekey_data = iwlagn_mac_set_rekey_data,
1572 .conf_tx = iwlagn_mac_conf_tx,
1573 .bss_info_changed = iwlagn_bss_info_changed,
1574 .ampdu_action = iwlagn_mac_ampdu_action,
1575 .hw_scan = iwlagn_mac_hw_scan,
1576 .sta_notify = iwlagn_mac_sta_notify,
1577 .sta_add = iwlagn_mac_sta_add,
1578 .sta_remove = iwlagn_mac_sta_remove,
1579 .channel_switch = iwlagn_mac_channel_switch,
1580 .flush = iwlagn_mac_flush,
1581 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1582 .remain_on_channel = iwlagn_mac_remain_on_channel,
1583 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1584 .rssi_callback = iwlagn_mac_rssi_callback,
1585 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1586 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1587 .tx_sync = iwlagn_mac_tx_sync,
1588 .finish_tx_sync = iwlagn_mac_finish_tx_sync,
1589 .set_tim = iwlagn_mac_set_tim,
1590 };
1591
1592 /* This function both allocates and initializes hw and priv. */
1593 struct ieee80211_hw *iwl_alloc_all(void)
1594 {
1595 struct iwl_priv *priv;
1596 /* mac80211 allocates memory for this device instance, including
1597 * space for this driver's private structure */
1598 struct ieee80211_hw *hw;
1599
1600 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
1601 if (!hw)
1602 goto out;
1603
1604 priv = hw->priv;
1605 priv->hw = hw;
1606
1607 out:
1608 return hw;
1609 }