Merge tag 'stmp-dev' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / wireless / iwlwifi / iwl-mac80211.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2012 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/etherdevice.h>
39 #include <linux/if_arp.h>
40
41 #include <net/mac80211.h>
42
43 #include <asm/div64.h>
44
45 #include "iwl-eeprom.h"
46 #include "iwl-dev.h"
47 #include "iwl-io.h"
48 #include "iwl-agn-calib.h"
49 #include "iwl-agn.h"
50 #include "iwl-trans.h"
51 #include "iwl-op-mode.h"
52 #include "iwl-modparams.h"
53
54 /*****************************************************************************
55 *
56 * mac80211 entry point functions
57 *
58 *****************************************************************************/
59
60 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
61 {
62 .max = 1,
63 .types = BIT(NL80211_IFTYPE_STATION),
64 },
65 {
66 .max = 1,
67 .types = BIT(NL80211_IFTYPE_AP),
68 },
69 };
70
71 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
72 {
73 .max = 2,
74 .types = BIT(NL80211_IFTYPE_STATION),
75 },
76 };
77
78 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
79 {
80 .max = 1,
81 .types = BIT(NL80211_IFTYPE_STATION),
82 },
83 {
84 .max = 1,
85 .types = BIT(NL80211_IFTYPE_P2P_GO) |
86 BIT(NL80211_IFTYPE_AP),
87 },
88 };
89
90 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
91 {
92 .max = 2,
93 .types = BIT(NL80211_IFTYPE_STATION),
94 },
95 {
96 .max = 1,
97 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
98 },
99 };
100
101 static const struct ieee80211_iface_combination
102 iwlagn_iface_combinations_dualmode[] = {
103 { .num_different_channels = 1,
104 .max_interfaces = 2,
105 .beacon_int_infra_match = true,
106 .limits = iwlagn_sta_ap_limits,
107 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
108 },
109 { .num_different_channels = 1,
110 .max_interfaces = 2,
111 .limits = iwlagn_2sta_limits,
112 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
113 },
114 };
115
116 static const struct ieee80211_iface_combination
117 iwlagn_iface_combinations_p2p[] = {
118 { .num_different_channels = 1,
119 .max_interfaces = 2,
120 .beacon_int_infra_match = true,
121 .limits = iwlagn_p2p_sta_go_limits,
122 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
123 },
124 { .num_different_channels = 1,
125 .max_interfaces = 2,
126 .limits = iwlagn_p2p_2sta_limits,
127 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
128 },
129 };
130
131 /*
132 * Not a mac80211 entry point function, but it fits in with all the
133 * other mac80211 functions grouped here.
134 */
135 int iwlagn_mac_setup_register(struct iwl_priv *priv,
136 const struct iwl_ucode_capabilities *capa)
137 {
138 int ret;
139 struct ieee80211_hw *hw = priv->hw;
140 struct iwl_rxon_context *ctx;
141
142 hw->rate_control_algorithm = "iwl-agn-rs";
143
144 /* Tell mac80211 our characteristics */
145 hw->flags = IEEE80211_HW_SIGNAL_DBM |
146 IEEE80211_HW_AMPDU_AGGREGATION |
147 IEEE80211_HW_NEED_DTIM_PERIOD |
148 IEEE80211_HW_SPECTRUM_MGMT |
149 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
150 IEEE80211_HW_QUEUE_CONTROL |
151 IEEE80211_HW_SUPPORTS_PS |
152 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
153 IEEE80211_HW_WANT_MONITOR_VIF |
154 IEEE80211_HW_SCAN_WHILE_IDLE;
155
156 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
157
158 /*
159 * Including the following line will crash some AP's. This
160 * workaround removes the stimulus which causes the crash until
161 * the AP software can be fixed.
162 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
163 */
164
165 if (priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE)
166 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
167 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
168
169 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
170 /* enable 11w if the uCode advertise */
171 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
172 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
173 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
174
175 hw->sta_data_size = sizeof(struct iwl_station_priv);
176 hw->vif_data_size = sizeof(struct iwl_vif_priv);
177
178 for_each_context(priv, ctx) {
179 hw->wiphy->interface_modes |= ctx->interface_modes;
180 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
181 }
182
183 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
184
185 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
186 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
187 hw->wiphy->n_iface_combinations =
188 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
189 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
190 hw->wiphy->iface_combinations =
191 iwlagn_iface_combinations_dualmode;
192 hw->wiphy->n_iface_combinations =
193 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
194 }
195
196 hw->wiphy->max_remain_on_channel_duration = 1000;
197
198 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
199 WIPHY_FLAG_DISABLE_BEACON_HINTS |
200 WIPHY_FLAG_IBSS_RSN;
201
202 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
203 priv->trans->ops->wowlan_suspend &&
204 device_can_wakeup(priv->trans->dev)) {
205 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
206 WIPHY_WOWLAN_DISCONNECT |
207 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
208 WIPHY_WOWLAN_RFKILL_RELEASE;
209 if (!iwlwifi_mod_params.sw_crypto)
210 hw->wiphy->wowlan.flags |=
211 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
212 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
213
214 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
215 hw->wiphy->wowlan.pattern_min_len =
216 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
217 hw->wiphy->wowlan.pattern_max_len =
218 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
219 }
220
221 if (iwlwifi_mod_params.power_save)
222 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
223 else
224 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
225
226 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
227 /* we create the 802.11 header and a max-length SSID element */
228 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
229
230 /*
231 * We don't use all queues: 4 and 9 are unused and any
232 * aggregation queue gets mapped down to the AC queue.
233 */
234 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
235
236 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
237
238 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
239 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
240 &priv->bands[IEEE80211_BAND_2GHZ];
241 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
242 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
243 &priv->bands[IEEE80211_BAND_5GHZ];
244
245 hw->wiphy->hw_version = priv->trans->hw_id;
246
247 iwl_leds_init(priv);
248
249 ret = ieee80211_register_hw(priv->hw);
250 if (ret) {
251 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
252 return ret;
253 }
254 priv->mac80211_registered = 1;
255
256 return 0;
257 }
258
259 void iwlagn_mac_unregister(struct iwl_priv *priv)
260 {
261 if (!priv->mac80211_registered)
262 return;
263 iwl_leds_exit(priv);
264 ieee80211_unregister_hw(priv->hw);
265 priv->mac80211_registered = 0;
266 }
267
268 static int __iwl_up(struct iwl_priv *priv)
269 {
270 struct iwl_rxon_context *ctx;
271 int ret;
272
273 lockdep_assert_held(&priv->mutex);
274
275 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
276 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
277 return -EIO;
278 }
279
280 for_each_context(priv, ctx) {
281 ret = iwlagn_alloc_bcast_station(priv, ctx);
282 if (ret) {
283 iwl_dealloc_bcast_stations(priv);
284 return ret;
285 }
286 }
287
288 ret = iwl_run_init_ucode(priv);
289 if (ret) {
290 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
291 goto error;
292 }
293
294 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
295 if (ret) {
296 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
297 goto error;
298 }
299
300 ret = iwl_alive_start(priv);
301 if (ret)
302 goto error;
303 return 0;
304
305 error:
306 set_bit(STATUS_EXIT_PENDING, &priv->status);
307 iwl_down(priv);
308 clear_bit(STATUS_EXIT_PENDING, &priv->status);
309
310 IWL_ERR(priv, "Unable to initialize device.\n");
311 return ret;
312 }
313
314 static int iwlagn_mac_start(struct ieee80211_hw *hw)
315 {
316 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
317 int ret;
318
319 IWL_DEBUG_MAC80211(priv, "enter\n");
320
321 /* we should be verifying the device is ready to be opened */
322 mutex_lock(&priv->mutex);
323 ret = __iwl_up(priv);
324 mutex_unlock(&priv->mutex);
325 if (ret)
326 return ret;
327
328 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
329
330 /* Now we should be done, and the READY bit should be set. */
331 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
332 ret = -EIO;
333
334 iwlagn_led_enable(priv);
335
336 priv->is_open = 1;
337 IWL_DEBUG_MAC80211(priv, "leave\n");
338 return 0;
339 }
340
341 void iwlagn_mac_stop(struct ieee80211_hw *hw)
342 {
343 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
344
345 IWL_DEBUG_MAC80211(priv, "enter\n");
346
347 if (!priv->is_open)
348 return;
349
350 priv->is_open = 0;
351
352 mutex_lock(&priv->mutex);
353 iwl_down(priv);
354 mutex_unlock(&priv->mutex);
355
356 iwl_cancel_deferred_work(priv);
357
358 flush_workqueue(priv->workqueue);
359
360 /* User space software may expect getting rfkill changes
361 * even if interface is down, trans->down will leave the RF
362 * kill interrupt enabled
363 */
364 iwl_trans_stop_hw(priv->trans, false);
365
366 IWL_DEBUG_MAC80211(priv, "leave\n");
367 }
368
369 void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
370 struct ieee80211_vif *vif,
371 struct cfg80211_gtk_rekey_data *data)
372 {
373 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
374
375 if (iwlwifi_mod_params.sw_crypto)
376 return;
377
378 IWL_DEBUG_MAC80211(priv, "enter\n");
379 mutex_lock(&priv->mutex);
380
381 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
382 goto out;
383
384 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
385 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
386 priv->replay_ctr =
387 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
388 priv->have_rekey_data = true;
389
390 out:
391 mutex_unlock(&priv->mutex);
392 IWL_DEBUG_MAC80211(priv, "leave\n");
393 }
394
395 #ifdef CONFIG_PM_SLEEP
396
397 int iwlagn_mac_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
398 {
399 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
400 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
401 int ret;
402
403 if (WARN_ON(!wowlan))
404 return -EINVAL;
405
406 IWL_DEBUG_MAC80211(priv, "enter\n");
407 mutex_lock(&priv->mutex);
408
409 /* Don't attempt WoWLAN when not associated, tear down instead. */
410 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
411 !iwl_is_associated_ctx(ctx)) {
412 ret = 1;
413 goto out;
414 }
415
416 ret = iwlagn_suspend(priv, wowlan);
417 if (ret)
418 goto error;
419
420 device_set_wakeup_enable(priv->trans->dev, true);
421
422 iwl_trans_wowlan_suspend(priv->trans);
423
424 goto out;
425
426 error:
427 priv->wowlan = false;
428 iwlagn_prepare_restart(priv);
429 ieee80211_restart_hw(priv->hw);
430 out:
431 mutex_unlock(&priv->mutex);
432 IWL_DEBUG_MAC80211(priv, "leave\n");
433
434 return ret;
435 }
436
437 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
438 {
439 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
440 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
441 struct ieee80211_vif *vif;
442 unsigned long flags;
443 u32 base, status = 0xffffffff;
444 int ret = -EIO;
445
446 IWL_DEBUG_MAC80211(priv, "enter\n");
447 mutex_lock(&priv->mutex);
448
449 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
450 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
451
452 base = priv->device_pointers.error_event_table;
453 if (iwlagn_hw_valid_rtc_data_addr(base)) {
454 spin_lock_irqsave(&priv->trans->reg_lock, flags);
455 ret = iwl_grab_nic_access_silent(priv->trans);
456 if (likely(ret == 0)) {
457 iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
458 status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
459 iwl_release_nic_access(priv->trans);
460 }
461 spin_unlock_irqrestore(&priv->trans->reg_lock, flags);
462
463 #ifdef CONFIG_IWLWIFI_DEBUGFS
464 if (ret == 0) {
465 const struct fw_img *img;
466
467 img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
468 if (!priv->wowlan_sram) {
469 priv->wowlan_sram =
470 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
471 GFP_KERNEL);
472 }
473
474 if (priv->wowlan_sram)
475 _iwl_read_targ_mem_words(
476 priv->trans, 0x800000,
477 priv->wowlan_sram,
478 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
479 }
480 #endif
481 }
482
483 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
484 vif = ctx->vif;
485
486 priv->wowlan = false;
487
488 device_set_wakeup_enable(priv->trans->dev, false);
489
490 iwlagn_prepare_restart(priv);
491
492 memset((void *)&ctx->active, 0, sizeof(ctx->active));
493 iwl_connection_init_rx_config(priv, ctx);
494 iwlagn_set_rxon_chain(priv, ctx);
495
496 mutex_unlock(&priv->mutex);
497 IWL_DEBUG_MAC80211(priv, "leave\n");
498
499 ieee80211_resume_disconnect(vif);
500
501 return 1;
502 }
503
504 #endif
505
506 void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
507 {
508 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
509
510 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
511 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
512
513 if (iwlagn_tx_skb(priv, skb))
514 dev_kfree_skb_any(skb);
515 }
516
517 void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
518 struct ieee80211_vif *vif,
519 struct ieee80211_key_conf *keyconf,
520 struct ieee80211_sta *sta,
521 u32 iv32, u16 *phase1key)
522 {
523 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
524
525 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
526 }
527
528 int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
529 struct ieee80211_vif *vif,
530 struct ieee80211_sta *sta,
531 struct ieee80211_key_conf *key)
532 {
533 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
534 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
535 struct iwl_rxon_context *ctx = vif_priv->ctx;
536 int ret;
537 bool is_default_wep_key = false;
538
539 IWL_DEBUG_MAC80211(priv, "enter\n");
540
541 if (iwlwifi_mod_params.sw_crypto) {
542 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
543 return -EOPNOTSUPP;
544 }
545
546 switch (key->cipher) {
547 case WLAN_CIPHER_SUITE_TKIP:
548 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
549 /* fall through */
550 case WLAN_CIPHER_SUITE_CCMP:
551 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
552 break;
553 default:
554 break;
555 }
556
557 /*
558 * We could program these keys into the hardware as well, but we
559 * don't expect much multicast traffic in IBSS and having keys
560 * for more stations is probably more useful.
561 *
562 * Mark key TX-only and return 0.
563 */
564 if (vif->type == NL80211_IFTYPE_ADHOC &&
565 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
566 key->hw_key_idx = WEP_INVALID_OFFSET;
567 return 0;
568 }
569
570 /* If they key was TX-only, accept deletion */
571 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
572 return 0;
573
574 mutex_lock(&priv->mutex);
575 iwl_scan_cancel_timeout(priv, 100);
576
577 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
578
579 /*
580 * If we are getting WEP group key and we didn't receive any key mapping
581 * so far, we are in legacy wep mode (group key only), otherwise we are
582 * in 1X mode.
583 * In legacy wep mode, we use another host command to the uCode.
584 */
585 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
586 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
587 if (cmd == SET_KEY)
588 is_default_wep_key = !ctx->key_mapping_keys;
589 else
590 is_default_wep_key =
591 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
592 }
593
594
595 switch (cmd) {
596 case SET_KEY:
597 if (is_default_wep_key) {
598 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
599 break;
600 }
601 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
602 if (ret) {
603 /*
604 * can't add key for RX, but we don't need it
605 * in the device for TX so still return 0
606 */
607 ret = 0;
608 key->hw_key_idx = WEP_INVALID_OFFSET;
609 }
610
611 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
612 break;
613 case DISABLE_KEY:
614 if (is_default_wep_key)
615 ret = iwl_remove_default_wep_key(priv, ctx, key);
616 else
617 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
618
619 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
620 break;
621 default:
622 ret = -EINVAL;
623 }
624
625 mutex_unlock(&priv->mutex);
626 IWL_DEBUG_MAC80211(priv, "leave\n");
627
628 return ret;
629 }
630
631 int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
632 struct ieee80211_vif *vif,
633 enum ieee80211_ampdu_mlme_action action,
634 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
635 u8 buf_size)
636 {
637 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
638 int ret = -EINVAL;
639 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
640
641 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
642 sta->addr, tid);
643
644 if (!(priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE))
645 return -EACCES;
646
647 IWL_DEBUG_MAC80211(priv, "enter\n");
648 mutex_lock(&priv->mutex);
649
650 switch (action) {
651 case IEEE80211_AMPDU_RX_START:
652 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
653 break;
654 IWL_DEBUG_HT(priv, "start Rx\n");
655 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
656 break;
657 case IEEE80211_AMPDU_RX_STOP:
658 IWL_DEBUG_HT(priv, "stop Rx\n");
659 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
660 break;
661 case IEEE80211_AMPDU_TX_START:
662 if (!priv->trans->ops->tx_agg_setup)
663 break;
664 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
665 break;
666 IWL_DEBUG_HT(priv, "start Tx\n");
667 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
668 break;
669 case IEEE80211_AMPDU_TX_STOP:
670 IWL_DEBUG_HT(priv, "stop Tx\n");
671 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
672 if ((ret == 0) && (priv->agg_tids_count > 0)) {
673 priv->agg_tids_count--;
674 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
675 priv->agg_tids_count);
676 }
677 if (!priv->agg_tids_count &&
678 priv->hw_params.use_rts_for_aggregation) {
679 /*
680 * switch off RTS/CTS if it was previously enabled
681 */
682 sta_priv->lq_sta.lq.general_params.flags &=
683 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
684 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
685 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
686 }
687 break;
688 case IEEE80211_AMPDU_TX_OPERATIONAL:
689 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
690 break;
691 }
692 mutex_unlock(&priv->mutex);
693 IWL_DEBUG_MAC80211(priv, "leave\n");
694 return ret;
695 }
696
697 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
698 struct ieee80211_vif *vif,
699 struct ieee80211_sta *sta)
700 {
701 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
702 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
703 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
704 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
705 int ret;
706 u8 sta_id;
707
708 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
709 sta->addr);
710 sta_priv->sta_id = IWL_INVALID_STATION;
711
712 atomic_set(&sta_priv->pending_frames, 0);
713 if (vif->type == NL80211_IFTYPE_AP)
714 sta_priv->client = true;
715
716 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
717 is_ap, sta, &sta_id);
718 if (ret) {
719 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
720 sta->addr, ret);
721 /* Should we return success if return code is EEXIST ? */
722 return ret;
723 }
724
725 sta_priv->sta_id = sta_id;
726
727 return 0;
728 }
729
730 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
731 struct ieee80211_vif *vif,
732 struct ieee80211_sta *sta)
733 {
734 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
735 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
736 int ret;
737
738 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
739
740 if (vif->type == NL80211_IFTYPE_STATION) {
741 /*
742 * Station will be removed from device when the RXON
743 * is set to unassociated -- just deactivate it here
744 * to avoid re-programming it.
745 */
746 ret = 0;
747 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
748 } else {
749 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
750 if (ret)
751 IWL_DEBUG_QUIET_RFKILL(priv,
752 "Error removing station %pM\n", sta->addr);
753 }
754 return ret;
755 }
756
757 int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
758 struct ieee80211_vif *vif,
759 struct ieee80211_sta *sta,
760 enum ieee80211_sta_state old_state,
761 enum ieee80211_sta_state new_state)
762 {
763 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
764 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
765 enum {
766 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
767 } op = NONE;
768 int ret;
769
770 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
771 sta->addr, old_state, new_state);
772
773 mutex_lock(&priv->mutex);
774 if (vif->type == NL80211_IFTYPE_STATION) {
775 if (old_state == IEEE80211_STA_NOTEXIST &&
776 new_state == IEEE80211_STA_NONE)
777 op = ADD;
778 else if (old_state == IEEE80211_STA_NONE &&
779 new_state == IEEE80211_STA_NOTEXIST)
780 op = REMOVE;
781 else if (old_state == IEEE80211_STA_AUTH &&
782 new_state == IEEE80211_STA_ASSOC)
783 op = HT_RATE_INIT;
784 } else {
785 if (old_state == IEEE80211_STA_AUTH &&
786 new_state == IEEE80211_STA_ASSOC)
787 op = ADD_RATE_INIT;
788 else if (old_state == IEEE80211_STA_ASSOC &&
789 new_state == IEEE80211_STA_AUTH)
790 op = REMOVE;
791 }
792
793 switch (op) {
794 case ADD:
795 ret = iwlagn_mac_sta_add(hw, vif, sta);
796 break;
797 case REMOVE:
798 ret = iwlagn_mac_sta_remove(hw, vif, sta);
799 break;
800 case ADD_RATE_INIT:
801 ret = iwlagn_mac_sta_add(hw, vif, sta);
802 if (ret)
803 break;
804 /* Initialize rate scaling */
805 IWL_DEBUG_INFO(priv,
806 "Initializing rate scaling for station %pM\n",
807 sta->addr);
808 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
809 ret = 0;
810 break;
811 case HT_RATE_INIT:
812 /* Initialize rate scaling */
813 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
814 if (ret)
815 break;
816 IWL_DEBUG_INFO(priv,
817 "Initializing rate scaling for station %pM\n",
818 sta->addr);
819 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
820 ret = 0;
821 break;
822 default:
823 ret = 0;
824 break;
825 }
826
827 /*
828 * mac80211 might WARN if we fail, but due the way we
829 * (badly) handle hard rfkill, we might fail here
830 */
831 if (iwl_is_rfkill(priv))
832 ret = 0;
833
834 mutex_unlock(&priv->mutex);
835 IWL_DEBUG_MAC80211(priv, "leave\n");
836
837 return ret;
838 }
839
840 void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
841 struct ieee80211_channel_switch *ch_switch)
842 {
843 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
844 const struct iwl_channel_info *ch_info;
845 struct ieee80211_conf *conf = &hw->conf;
846 struct ieee80211_channel *channel = ch_switch->channel;
847 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
848 /*
849 * MULTI-FIXME
850 * When we add support for multiple interfaces, we need to
851 * revisit this. The channel switch command in the device
852 * only affects the BSS context, but what does that really
853 * mean? And what if we get a CSA on the second interface?
854 * This needs a lot of work.
855 */
856 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
857 u16 ch;
858
859 IWL_DEBUG_MAC80211(priv, "enter\n");
860
861 mutex_lock(&priv->mutex);
862
863 if (iwl_is_rfkill(priv))
864 goto out;
865
866 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
867 test_bit(STATUS_SCANNING, &priv->status) ||
868 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
869 goto out;
870
871 if (!iwl_is_associated_ctx(ctx))
872 goto out;
873
874 if (!priv->lib->set_channel_switch)
875 goto out;
876
877 ch = channel->hw_value;
878 if (le16_to_cpu(ctx->active.channel) == ch)
879 goto out;
880
881 ch_info = iwl_get_channel_info(priv, channel->band, ch);
882 if (!is_channel_valid(ch_info)) {
883 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
884 goto out;
885 }
886
887 priv->current_ht_config.smps = conf->smps_mode;
888
889 /* Configure HT40 channels */
890 ctx->ht.enabled = conf_is_ht(conf);
891 if (ctx->ht.enabled)
892 iwlagn_config_ht40(conf, ctx);
893 else
894 ctx->ht.is_40mhz = false;
895
896 if ((le16_to_cpu(ctx->staging.channel) != ch))
897 ctx->staging.flags = 0;
898
899 iwl_set_rxon_channel(priv, channel, ctx);
900 iwl_set_rxon_ht(priv, ht_conf);
901 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
902
903 /*
904 * at this point, staging_rxon has the
905 * configuration for channel switch
906 */
907 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
908 priv->switch_channel = cpu_to_le16(ch);
909 if (priv->lib->set_channel_switch(priv, ch_switch)) {
910 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
911 priv->switch_channel = 0;
912 ieee80211_chswitch_done(ctx->vif, false);
913 }
914
915 out:
916 mutex_unlock(&priv->mutex);
917 IWL_DEBUG_MAC80211(priv, "leave\n");
918 }
919
920 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
921 {
922 /*
923 * MULTI-FIXME
924 * See iwlagn_mac_channel_switch.
925 */
926 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
927
928 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
929 return;
930
931 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
932 ieee80211_chswitch_done(ctx->vif, is_success);
933 }
934
935 void iwlagn_configure_filter(struct ieee80211_hw *hw,
936 unsigned int changed_flags,
937 unsigned int *total_flags,
938 u64 multicast)
939 {
940 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
941 __le32 filter_or = 0, filter_nand = 0;
942 struct iwl_rxon_context *ctx;
943
944 #define CHK(test, flag) do { \
945 if (*total_flags & (test)) \
946 filter_or |= (flag); \
947 else \
948 filter_nand |= (flag); \
949 } while (0)
950
951 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
952 changed_flags, *total_flags);
953
954 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
955 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
956 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
957 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
958
959 #undef CHK
960
961 mutex_lock(&priv->mutex);
962
963 for_each_context(priv, ctx) {
964 ctx->staging.filter_flags &= ~filter_nand;
965 ctx->staging.filter_flags |= filter_or;
966
967 /*
968 * Not committing directly because hardware can perform a scan,
969 * but we'll eventually commit the filter flags change anyway.
970 */
971 }
972
973 mutex_unlock(&priv->mutex);
974
975 /*
976 * Receiving all multicast frames is always enabled by the
977 * default flags setup in iwl_connection_init_rx_config()
978 * since we currently do not support programming multicast
979 * filters into the device.
980 */
981 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
982 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
983 }
984
985 void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
986 {
987 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
988
989 mutex_lock(&priv->mutex);
990 IWL_DEBUG_MAC80211(priv, "enter\n");
991
992 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
993 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
994 goto done;
995 }
996 if (iwl_is_rfkill(priv)) {
997 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
998 goto done;
999 }
1000
1001 /*
1002 * mac80211 will not push any more frames for transmit
1003 * until the flush is completed
1004 */
1005 if (drop) {
1006 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1007 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1008 IWL_ERR(priv, "flush request fail\n");
1009 goto done;
1010 }
1011 }
1012 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1013 iwl_trans_wait_tx_queue_empty(priv->trans);
1014 done:
1015 mutex_unlock(&priv->mutex);
1016 IWL_DEBUG_MAC80211(priv, "leave\n");
1017 }
1018
1019 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1020 struct ieee80211_channel *channel,
1021 enum nl80211_channel_type channel_type,
1022 int duration)
1023 {
1024 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1025 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1026 int err = 0;
1027
1028 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1029 return -EOPNOTSUPP;
1030
1031 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1032 return -EOPNOTSUPP;
1033
1034 IWL_DEBUG_MAC80211(priv, "enter\n");
1035 mutex_lock(&priv->mutex);
1036
1037 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1038 err = -EBUSY;
1039 goto out;
1040 }
1041
1042 priv->hw_roc_channel = channel;
1043 priv->hw_roc_chantype = channel_type;
1044 /* convert from ms to TU */
1045 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1046 priv->hw_roc_start_notified = false;
1047 cancel_delayed_work(&priv->hw_roc_disable_work);
1048
1049 if (!ctx->is_active) {
1050 static const struct iwl_qos_info default_qos_data = {
1051 .def_qos_parm = {
1052 .ac[0] = {
1053 .cw_min = cpu_to_le16(3),
1054 .cw_max = cpu_to_le16(7),
1055 .aifsn = 2,
1056 .edca_txop = cpu_to_le16(1504),
1057 },
1058 .ac[1] = {
1059 .cw_min = cpu_to_le16(7),
1060 .cw_max = cpu_to_le16(15),
1061 .aifsn = 2,
1062 .edca_txop = cpu_to_le16(3008),
1063 },
1064 .ac[2] = {
1065 .cw_min = cpu_to_le16(15),
1066 .cw_max = cpu_to_le16(1023),
1067 .aifsn = 3,
1068 },
1069 .ac[3] = {
1070 .cw_min = cpu_to_le16(15),
1071 .cw_max = cpu_to_le16(1023),
1072 .aifsn = 7,
1073 },
1074 },
1075 };
1076
1077 ctx->is_active = true;
1078 ctx->qos_data = default_qos_data;
1079 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1080 memcpy(ctx->staging.node_addr,
1081 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1082 ETH_ALEN);
1083 memcpy(ctx->staging.bssid_addr,
1084 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1085 ETH_ALEN);
1086 err = iwlagn_commit_rxon(priv, ctx);
1087 if (err)
1088 goto out;
1089 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1090 RXON_FILTER_PROMISC_MSK |
1091 RXON_FILTER_CTL2HOST_MSK;
1092
1093 err = iwlagn_commit_rxon(priv, ctx);
1094 if (err) {
1095 iwlagn_disable_roc(priv);
1096 goto out;
1097 }
1098 priv->hw_roc_setup = true;
1099 }
1100
1101 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1102 if (err)
1103 iwlagn_disable_roc(priv);
1104
1105 out:
1106 mutex_unlock(&priv->mutex);
1107 IWL_DEBUG_MAC80211(priv, "leave\n");
1108
1109 return err;
1110 }
1111
1112 int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1113 {
1114 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1115
1116 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1117 return -EOPNOTSUPP;
1118
1119 IWL_DEBUG_MAC80211(priv, "enter\n");
1120 mutex_lock(&priv->mutex);
1121 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1122 iwlagn_disable_roc(priv);
1123 mutex_unlock(&priv->mutex);
1124 IWL_DEBUG_MAC80211(priv, "leave\n");
1125
1126 return 0;
1127 }
1128
1129 void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1130 enum ieee80211_rssi_event rssi_event)
1131 {
1132 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1133
1134 IWL_DEBUG_MAC80211(priv, "enter\n");
1135 mutex_lock(&priv->mutex);
1136
1137 if (priv->cfg->bt_params &&
1138 priv->cfg->bt_params->advanced_bt_coexist) {
1139 if (rssi_event == RSSI_EVENT_LOW)
1140 priv->bt_enable_pspoll = true;
1141 else if (rssi_event == RSSI_EVENT_HIGH)
1142 priv->bt_enable_pspoll = false;
1143
1144 iwlagn_send_advance_bt_config(priv);
1145 } else {
1146 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1147 "ignoring RSSI callback\n");
1148 }
1149
1150 mutex_unlock(&priv->mutex);
1151 IWL_DEBUG_MAC80211(priv, "leave\n");
1152 }
1153
1154 int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1155 struct ieee80211_sta *sta, bool set)
1156 {
1157 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1158
1159 queue_work(priv->workqueue, &priv->beacon_update);
1160
1161 return 0;
1162 }
1163
1164 int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1165 struct ieee80211_vif *vif, u16 queue,
1166 const struct ieee80211_tx_queue_params *params)
1167 {
1168 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1169 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1170 struct iwl_rxon_context *ctx = vif_priv->ctx;
1171 int q;
1172
1173 if (WARN_ON(!ctx))
1174 return -EINVAL;
1175
1176 IWL_DEBUG_MAC80211(priv, "enter\n");
1177
1178 if (!iwl_is_ready_rf(priv)) {
1179 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1180 return -EIO;
1181 }
1182
1183 if (queue >= AC_NUM) {
1184 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1185 return 0;
1186 }
1187
1188 q = AC_NUM - 1 - queue;
1189
1190 mutex_lock(&priv->mutex);
1191
1192 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1193 cpu_to_le16(params->cw_min);
1194 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1195 cpu_to_le16(params->cw_max);
1196 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1197 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1198 cpu_to_le16((params->txop * 32));
1199
1200 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1201
1202 mutex_unlock(&priv->mutex);
1203
1204 IWL_DEBUG_MAC80211(priv, "leave\n");
1205 return 0;
1206 }
1207
1208 int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1209 {
1210 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1211
1212 return priv->ibss_manager == IWL_IBSS_MANAGER;
1213 }
1214
1215 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1216 {
1217 iwl_connection_init_rx_config(priv, ctx);
1218
1219 iwlagn_set_rxon_chain(priv, ctx);
1220
1221 return iwlagn_commit_rxon(priv, ctx);
1222 }
1223
1224 int iwl_setup_interface(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1225 {
1226 struct ieee80211_vif *vif = ctx->vif;
1227 int err, ac;
1228
1229 lockdep_assert_held(&priv->mutex);
1230
1231 /*
1232 * This variable will be correct only when there's just
1233 * a single context, but all code using it is for hardware
1234 * that supports only one context.
1235 */
1236 priv->iw_mode = vif->type;
1237
1238 ctx->is_active = true;
1239
1240 err = iwl_set_mode(priv, ctx);
1241 if (err) {
1242 if (!ctx->always_active)
1243 ctx->is_active = false;
1244 return err;
1245 }
1246
1247 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1248 vif->type == NL80211_IFTYPE_ADHOC) {
1249 /*
1250 * pretend to have high BT traffic as long as we
1251 * are operating in IBSS mode, as this will cause
1252 * the rate scaling etc. to behave as intended.
1253 */
1254 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1255 }
1256
1257 /* set up queue mappings */
1258 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1259 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1260
1261 if (vif->type == NL80211_IFTYPE_AP)
1262 vif->cab_queue = ctx->mcast_queue;
1263 else
1264 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1265
1266 return 0;
1267 }
1268
1269 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1270 struct ieee80211_vif *vif)
1271 {
1272 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1273 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1274 struct iwl_rxon_context *tmp, *ctx = NULL;
1275 int err;
1276 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1277 bool reset = false;
1278
1279 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1280 viftype, vif->addr);
1281
1282 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1283
1284 mutex_lock(&priv->mutex);
1285
1286 iwlagn_disable_roc(priv);
1287
1288 if (!iwl_is_ready_rf(priv)) {
1289 IWL_WARN(priv, "Try to add interface when device not ready\n");
1290 err = -EINVAL;
1291 goto out;
1292 }
1293
1294 for_each_context(priv, tmp) {
1295 u32 possible_modes =
1296 tmp->interface_modes | tmp->exclusive_interface_modes;
1297
1298 if (tmp->vif) {
1299 /* On reset we need to add the same interface again */
1300 if (tmp->vif == vif) {
1301 reset = true;
1302 ctx = tmp;
1303 break;
1304 }
1305
1306 /* check if this busy context is exclusive */
1307 if (tmp->exclusive_interface_modes &
1308 BIT(tmp->vif->type)) {
1309 err = -EINVAL;
1310 goto out;
1311 }
1312 continue;
1313 }
1314
1315 if (!(possible_modes & BIT(viftype)))
1316 continue;
1317
1318 /* have maybe usable context w/o interface */
1319 ctx = tmp;
1320 break;
1321 }
1322
1323 if (!ctx) {
1324 err = -EOPNOTSUPP;
1325 goto out;
1326 }
1327
1328 vif_priv->ctx = ctx;
1329 ctx->vif = vif;
1330
1331 err = iwl_setup_interface(priv, ctx);
1332 if (!err || reset)
1333 goto out;
1334
1335 ctx->vif = NULL;
1336 priv->iw_mode = NL80211_IFTYPE_STATION;
1337 out:
1338 mutex_unlock(&priv->mutex);
1339
1340 IWL_DEBUG_MAC80211(priv, "leave\n");
1341 return err;
1342 }
1343
1344 void iwl_teardown_interface(struct iwl_priv *priv,
1345 struct ieee80211_vif *vif,
1346 bool mode_change)
1347 {
1348 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1349
1350 lockdep_assert_held(&priv->mutex);
1351
1352 if (priv->scan_vif == vif) {
1353 iwl_scan_cancel_timeout(priv, 200);
1354 iwl_force_scan_end(priv);
1355 }
1356
1357 if (!mode_change) {
1358 iwl_set_mode(priv, ctx);
1359 if (!ctx->always_active)
1360 ctx->is_active = false;
1361 }
1362
1363 /*
1364 * When removing the IBSS interface, overwrite the
1365 * BT traffic load with the stored one from the last
1366 * notification, if any. If this is a device that
1367 * doesn't implement this, this has no effect since
1368 * both values are the same and zero.
1369 */
1370 if (vif->type == NL80211_IFTYPE_ADHOC)
1371 priv->bt_traffic_load = priv->last_bt_traffic_load;
1372 }
1373
1374 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1375 struct ieee80211_vif *vif)
1376 {
1377 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1378 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1379
1380 IWL_DEBUG_MAC80211(priv, "enter\n");
1381
1382 mutex_lock(&priv->mutex);
1383
1384 if (WARN_ON(ctx->vif != vif)) {
1385 struct iwl_rxon_context *tmp;
1386 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1387 for_each_context(priv, tmp)
1388 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1389 tmp->ctxid, tmp, tmp->vif);
1390 }
1391 ctx->vif = NULL;
1392
1393 iwl_teardown_interface(priv, vif, false);
1394
1395 mutex_unlock(&priv->mutex);
1396
1397 IWL_DEBUG_MAC80211(priv, "leave\n");
1398
1399 }
1400
1401 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1402 struct ieee80211_vif *vif,
1403 enum nl80211_iftype newtype, bool newp2p)
1404 {
1405 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1406 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1407 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1408 struct iwl_rxon_context *tmp;
1409 enum nl80211_iftype newviftype = newtype;
1410 u32 interface_modes;
1411 int err;
1412
1413 IWL_DEBUG_MAC80211(priv, "enter\n");
1414
1415 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1416
1417 mutex_lock(&priv->mutex);
1418
1419 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1420 /*
1421 * Huh? But wait ... this can maybe happen when
1422 * we're in the middle of a firmware restart!
1423 */
1424 err = -EBUSY;
1425 goto out;
1426 }
1427
1428 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1429
1430 if (!(interface_modes & BIT(newtype))) {
1431 err = -EBUSY;
1432 goto out;
1433 }
1434
1435 /*
1436 * Refuse a change that should be done by moving from the PAN
1437 * context to the BSS context instead, if the BSS context is
1438 * available and can support the new interface type.
1439 */
1440 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1441 (bss_ctx->interface_modes & BIT(newtype) ||
1442 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1443 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1444 err = -EBUSY;
1445 goto out;
1446 }
1447
1448 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1449 for_each_context(priv, tmp) {
1450 if (ctx == tmp)
1451 continue;
1452
1453 if (!tmp->vif)
1454 continue;
1455
1456 /*
1457 * The current mode switch would be exclusive, but
1458 * another context is active ... refuse the switch.
1459 */
1460 err = -EBUSY;
1461 goto out;
1462 }
1463 }
1464
1465 /* success */
1466 iwl_teardown_interface(priv, vif, true);
1467 vif->type = newviftype;
1468 vif->p2p = newp2p;
1469 err = iwl_setup_interface(priv, ctx);
1470 WARN_ON(err);
1471 /*
1472 * We've switched internally, but submitting to the
1473 * device may have failed for some reason. Mask this
1474 * error, because otherwise mac80211 will not switch
1475 * (and set the interface type back) and we'll be
1476 * out of sync with it.
1477 */
1478 err = 0;
1479
1480 out:
1481 mutex_unlock(&priv->mutex);
1482 IWL_DEBUG_MAC80211(priv, "leave\n");
1483
1484 return err;
1485 }
1486
1487 int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1488 struct ieee80211_vif *vif,
1489 struct cfg80211_scan_request *req)
1490 {
1491 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1492 int ret;
1493
1494 IWL_DEBUG_MAC80211(priv, "enter\n");
1495
1496 if (req->n_channels == 0)
1497 return -EINVAL;
1498
1499 mutex_lock(&priv->mutex);
1500
1501 /*
1502 * If an internal scan is in progress, just set
1503 * up the scan_request as per above.
1504 */
1505 if (priv->scan_type != IWL_SCAN_NORMAL) {
1506 IWL_DEBUG_SCAN(priv,
1507 "SCAN request during internal scan - defer\n");
1508 priv->scan_request = req;
1509 priv->scan_vif = vif;
1510 ret = 0;
1511 } else {
1512 priv->scan_request = req;
1513 priv->scan_vif = vif;
1514 /*
1515 * mac80211 will only ask for one band at a time
1516 * so using channels[0] here is ok
1517 */
1518 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1519 req->channels[0]->band);
1520 if (ret) {
1521 priv->scan_request = NULL;
1522 priv->scan_vif = NULL;
1523 }
1524 }
1525
1526 IWL_DEBUG_MAC80211(priv, "leave\n");
1527
1528 mutex_unlock(&priv->mutex);
1529
1530 return ret;
1531 }
1532
1533 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1534 {
1535 struct iwl_addsta_cmd cmd = {
1536 .mode = STA_CONTROL_MODIFY_MSK,
1537 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1538 .sta.sta_id = sta_id,
1539 };
1540
1541 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1542 }
1543
1544 void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1545 struct ieee80211_vif *vif,
1546 enum sta_notify_cmd cmd,
1547 struct ieee80211_sta *sta)
1548 {
1549 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1550 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1551 int sta_id;
1552
1553 IWL_DEBUG_MAC80211(priv, "enter\n");
1554
1555 switch (cmd) {
1556 case STA_NOTIFY_SLEEP:
1557 WARN_ON(!sta_priv->client);
1558 sta_priv->asleep = true;
1559 if (atomic_read(&sta_priv->pending_frames) > 0)
1560 ieee80211_sta_block_awake(hw, sta, true);
1561 break;
1562 case STA_NOTIFY_AWAKE:
1563 WARN_ON(!sta_priv->client);
1564 if (!sta_priv->asleep)
1565 break;
1566 sta_priv->asleep = false;
1567 sta_id = iwl_sta_id(sta);
1568 if (sta_id != IWL_INVALID_STATION)
1569 iwl_sta_modify_ps_wake(priv, sta_id);
1570 break;
1571 default:
1572 break;
1573 }
1574 IWL_DEBUG_MAC80211(priv, "leave\n");
1575 }
1576
1577 struct ieee80211_ops iwlagn_hw_ops = {
1578 .tx = iwlagn_mac_tx,
1579 .start = iwlagn_mac_start,
1580 .stop = iwlagn_mac_stop,
1581 #ifdef CONFIG_PM_SLEEP
1582 .suspend = iwlagn_mac_suspend,
1583 .resume = iwlagn_mac_resume,
1584 #endif
1585 .add_interface = iwlagn_mac_add_interface,
1586 .remove_interface = iwlagn_mac_remove_interface,
1587 .change_interface = iwlagn_mac_change_interface,
1588 .config = iwlagn_mac_config,
1589 .configure_filter = iwlagn_configure_filter,
1590 .set_key = iwlagn_mac_set_key,
1591 .update_tkip_key = iwlagn_mac_update_tkip_key,
1592 .set_rekey_data = iwlagn_mac_set_rekey_data,
1593 .conf_tx = iwlagn_mac_conf_tx,
1594 .bss_info_changed = iwlagn_bss_info_changed,
1595 .ampdu_action = iwlagn_mac_ampdu_action,
1596 .hw_scan = iwlagn_mac_hw_scan,
1597 .sta_notify = iwlagn_mac_sta_notify,
1598 .sta_state = iwlagn_mac_sta_state,
1599 .channel_switch = iwlagn_mac_channel_switch,
1600 .flush = iwlagn_mac_flush,
1601 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1602 .remain_on_channel = iwlagn_mac_remain_on_channel,
1603 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1604 .rssi_callback = iwlagn_mac_rssi_callback,
1605 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1606 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1607 .set_tim = iwlagn_mac_set_tim,
1608 };
1609
1610 /* This function both allocates and initializes hw and priv. */
1611 struct ieee80211_hw *iwl_alloc_all(void)
1612 {
1613 struct iwl_priv *priv;
1614 struct iwl_op_mode *op_mode;
1615 /* mac80211 allocates memory for this device instance, including
1616 * space for this driver's private structure */
1617 struct ieee80211_hw *hw;
1618
1619 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1620 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1621 if (!hw)
1622 goto out;
1623
1624 op_mode = hw->priv;
1625 priv = IWL_OP_MODE_GET_DVM(op_mode);
1626 priv->hw = hw;
1627
1628 out:
1629 return hw;
1630 }