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regulator: max8973: provide enable/disable if external control disabled
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / dvm / 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/ieee80211_radiotap.h>
42 #include <net/mac80211.h>
43
44 #include <asm/div64.h>
45
46 #include "iwl-io.h"
47 #include "iwl-trans.h"
48 #include "iwl-op-mode.h"
49 #include "iwl-modparams.h"
50
51 #include "dev.h"
52 #include "calib.h"
53 #include "agn.h"
54
55 /*****************************************************************************
56 *
57 * mac80211 entry point functions
58 *
59 *****************************************************************************/
60
61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
62 {
63 .max = 1,
64 .types = BIT(NL80211_IFTYPE_STATION),
65 },
66 {
67 .max = 1,
68 .types = BIT(NL80211_IFTYPE_AP),
69 },
70 };
71
72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
73 {
74 .max = 2,
75 .types = BIT(NL80211_IFTYPE_STATION),
76 },
77 };
78
79 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
80 {
81 .max = 1,
82 .types = BIT(NL80211_IFTYPE_STATION),
83 },
84 {
85 .max = 1,
86 .types = BIT(NL80211_IFTYPE_P2P_GO) |
87 BIT(NL80211_IFTYPE_AP),
88 },
89 };
90
91 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
92 {
93 .max = 2,
94 .types = BIT(NL80211_IFTYPE_STATION),
95 },
96 {
97 .max = 1,
98 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
99 },
100 };
101
102 static const struct ieee80211_iface_combination
103 iwlagn_iface_combinations_dualmode[] = {
104 { .num_different_channels = 1,
105 .max_interfaces = 2,
106 .beacon_int_infra_match = true,
107 .limits = iwlagn_sta_ap_limits,
108 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
109 },
110 { .num_different_channels = 1,
111 .max_interfaces = 2,
112 .limits = iwlagn_2sta_limits,
113 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
114 },
115 };
116
117 static const struct ieee80211_iface_combination
118 iwlagn_iface_combinations_p2p[] = {
119 { .num_different_channels = 1,
120 .max_interfaces = 2,
121 .beacon_int_infra_match = true,
122 .limits = iwlagn_p2p_sta_go_limits,
123 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
124 },
125 { .num_different_channels = 1,
126 .max_interfaces = 2,
127 .limits = iwlagn_p2p_2sta_limits,
128 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
129 },
130 };
131
132 /*
133 * Not a mac80211 entry point function, but it fits in with all the
134 * other mac80211 functions grouped here.
135 */
136 int iwlagn_mac_setup_register(struct iwl_priv *priv,
137 const struct iwl_ucode_capabilities *capa)
138 {
139 int ret;
140 struct ieee80211_hw *hw = priv->hw;
141 struct iwl_rxon_context *ctx;
142
143 hw->rate_control_algorithm = "iwl-agn-rs";
144
145 /* Tell mac80211 our characteristics */
146 hw->flags = IEEE80211_HW_SIGNAL_DBM |
147 IEEE80211_HW_AMPDU_AGGREGATION |
148 IEEE80211_HW_NEED_DTIM_PERIOD |
149 IEEE80211_HW_SPECTRUM_MGMT |
150 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
151 IEEE80211_HW_QUEUE_CONTROL |
152 IEEE80211_HW_SUPPORTS_PS |
153 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
154 IEEE80211_HW_WANT_MONITOR_VIF |
155 IEEE80211_HW_SCAN_WHILE_IDLE;
156
157 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
158 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
159
160 /*
161 * Including the following line will crash some AP's. This
162 * workaround removes the stimulus which causes the crash until
163 * the AP software can be fixed.
164 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
165 */
166
167 if (priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE)
168 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
169 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
170
171 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
172 /* enable 11w if the uCode advertise */
173 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
174 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
175 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
176
177 hw->sta_data_size = sizeof(struct iwl_station_priv);
178 hw->vif_data_size = sizeof(struct iwl_vif_priv);
179
180 for_each_context(priv, ctx) {
181 hw->wiphy->interface_modes |= ctx->interface_modes;
182 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
183 }
184
185 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
186
187 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
188 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
189 hw->wiphy->n_iface_combinations =
190 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
191 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
192 hw->wiphy->iface_combinations =
193 iwlagn_iface_combinations_dualmode;
194 hw->wiphy->n_iface_combinations =
195 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
196 }
197
198 hw->wiphy->max_remain_on_channel_duration = 500;
199
200 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
201 WIPHY_FLAG_DISABLE_BEACON_HINTS |
202 WIPHY_FLAG_IBSS_RSN;
203
204 #ifdef CONFIG_PM_SLEEP
205 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
206 priv->trans->ops->wowlan_suspend &&
207 device_can_wakeup(priv->trans->dev)) {
208 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
209 WIPHY_WOWLAN_DISCONNECT |
210 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
211 WIPHY_WOWLAN_RFKILL_RELEASE;
212 if (!iwlwifi_mod_params.sw_crypto)
213 hw->wiphy->wowlan.flags |=
214 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
215 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
216
217 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
218 hw->wiphy->wowlan.pattern_min_len =
219 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
220 hw->wiphy->wowlan.pattern_max_len =
221 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
222 }
223 #endif
224
225 if (iwlwifi_mod_params.power_save)
226 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
227 else
228 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
229
230 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
231 /* we create the 802.11 header and a max-length SSID element */
232 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
233
234 /*
235 * We don't use all queues: 4 and 9 are unused and any
236 * aggregation queue gets mapped down to the AC queue.
237 */
238 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
239
240 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
241
242 if (priv->eeprom_data->bands[IEEE80211_BAND_2GHZ].n_channels)
243 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
244 &priv->eeprom_data->bands[IEEE80211_BAND_2GHZ];
245 if (priv->eeprom_data->bands[IEEE80211_BAND_5GHZ].n_channels)
246 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
247 &priv->eeprom_data->bands[IEEE80211_BAND_5GHZ];
248
249 hw->wiphy->hw_version = priv->trans->hw_id;
250
251 iwl_leds_init(priv);
252
253 ret = ieee80211_register_hw(priv->hw);
254 if (ret) {
255 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
256 iwl_leds_exit(priv);
257 return ret;
258 }
259 priv->mac80211_registered = 1;
260
261 return 0;
262 }
263
264 void iwlagn_mac_unregister(struct iwl_priv *priv)
265 {
266 if (!priv->mac80211_registered)
267 return;
268 iwl_leds_exit(priv);
269 ieee80211_unregister_hw(priv->hw);
270 priv->mac80211_registered = 0;
271 }
272
273 static int __iwl_up(struct iwl_priv *priv)
274 {
275 struct iwl_rxon_context *ctx;
276 int ret;
277
278 lockdep_assert_held(&priv->mutex);
279
280 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
281 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
282 return -EIO;
283 }
284
285 for_each_context(priv, ctx) {
286 ret = iwlagn_alloc_bcast_station(priv, ctx);
287 if (ret) {
288 iwl_dealloc_bcast_stations(priv);
289 return ret;
290 }
291 }
292
293 ret = iwl_run_init_ucode(priv);
294 if (ret) {
295 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
296 goto error;
297 }
298
299 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
300 if (ret) {
301 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
302 goto error;
303 }
304
305 ret = iwl_alive_start(priv);
306 if (ret)
307 goto error;
308 return 0;
309
310 error:
311 set_bit(STATUS_EXIT_PENDING, &priv->status);
312 iwl_down(priv);
313 clear_bit(STATUS_EXIT_PENDING, &priv->status);
314
315 IWL_ERR(priv, "Unable to initialize device.\n");
316 return ret;
317 }
318
319 static int iwlagn_mac_start(struct ieee80211_hw *hw)
320 {
321 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
322 int ret;
323
324 IWL_DEBUG_MAC80211(priv, "enter\n");
325
326 /* we should be verifying the device is ready to be opened */
327 mutex_lock(&priv->mutex);
328 ret = __iwl_up(priv);
329 mutex_unlock(&priv->mutex);
330 if (ret)
331 return ret;
332
333 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
334
335 /* Now we should be done, and the READY bit should be set. */
336 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
337 ret = -EIO;
338
339 iwlagn_led_enable(priv);
340
341 priv->is_open = 1;
342 IWL_DEBUG_MAC80211(priv, "leave\n");
343 return 0;
344 }
345
346 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
347 {
348 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
349
350 IWL_DEBUG_MAC80211(priv, "enter\n");
351
352 if (!priv->is_open)
353 return;
354
355 priv->is_open = 0;
356
357 mutex_lock(&priv->mutex);
358 iwl_down(priv);
359 mutex_unlock(&priv->mutex);
360
361 iwl_cancel_deferred_work(priv);
362
363 flush_workqueue(priv->workqueue);
364
365 /* User space software may expect getting rfkill changes
366 * even if interface is down, trans->down will leave the RF
367 * kill interrupt enabled
368 */
369 iwl_trans_stop_hw(priv->trans, false);
370
371 IWL_DEBUG_MAC80211(priv, "leave\n");
372 }
373
374 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
375 struct ieee80211_vif *vif,
376 struct cfg80211_gtk_rekey_data *data)
377 {
378 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
379
380 if (iwlwifi_mod_params.sw_crypto)
381 return;
382
383 IWL_DEBUG_MAC80211(priv, "enter\n");
384 mutex_lock(&priv->mutex);
385
386 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
387 goto out;
388
389 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
390 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
391 priv->replay_ctr =
392 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
393 priv->have_rekey_data = true;
394
395 out:
396 mutex_unlock(&priv->mutex);
397 IWL_DEBUG_MAC80211(priv, "leave\n");
398 }
399
400 #ifdef CONFIG_PM_SLEEP
401
402 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
403 struct cfg80211_wowlan *wowlan)
404 {
405 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
406 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
407 int ret;
408
409 if (WARN_ON(!wowlan))
410 return -EINVAL;
411
412 IWL_DEBUG_MAC80211(priv, "enter\n");
413 mutex_lock(&priv->mutex);
414
415 /* Don't attempt WoWLAN when not associated, tear down instead. */
416 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
417 !iwl_is_associated_ctx(ctx)) {
418 ret = 1;
419 goto out;
420 }
421
422 ret = iwlagn_suspend(priv, wowlan);
423 if (ret)
424 goto error;
425
426 iwl_trans_wowlan_suspend(priv->trans);
427
428 goto out;
429
430 error:
431 priv->wowlan = false;
432 iwlagn_prepare_restart(priv);
433 ieee80211_restart_hw(priv->hw);
434 out:
435 mutex_unlock(&priv->mutex);
436 IWL_DEBUG_MAC80211(priv, "leave\n");
437
438 return ret;
439 }
440
441 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
442 {
443 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
444 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
445 struct ieee80211_vif *vif;
446 unsigned long flags;
447 u32 base, status = 0xffffffff;
448 int ret = -EIO;
449
450 IWL_DEBUG_MAC80211(priv, "enter\n");
451 mutex_lock(&priv->mutex);
452
453 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
454 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
455
456 base = priv->device_pointers.error_event_table;
457 if (iwlagn_hw_valid_rtc_data_addr(base)) {
458 spin_lock_irqsave(&priv->trans->reg_lock, flags);
459 ret = iwl_grab_nic_access_silent(priv->trans);
460 if (likely(ret == 0)) {
461 iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
462 status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
463 iwl_release_nic_access(priv->trans);
464 }
465 spin_unlock_irqrestore(&priv->trans->reg_lock, flags);
466
467 #ifdef CONFIG_IWLWIFI_DEBUGFS
468 if (ret == 0) {
469 const struct fw_img *img;
470
471 img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
472 if (!priv->wowlan_sram) {
473 priv->wowlan_sram =
474 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
475 GFP_KERNEL);
476 }
477
478 if (priv->wowlan_sram)
479 _iwl_read_targ_mem_dwords(
480 priv->trans, 0x800000,
481 priv->wowlan_sram,
482 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
483 }
484 #endif
485 }
486
487 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
488 vif = ctx->vif;
489
490 priv->wowlan = false;
491
492 iwlagn_prepare_restart(priv);
493
494 memset((void *)&ctx->active, 0, sizeof(ctx->active));
495 iwl_connection_init_rx_config(priv, ctx);
496 iwlagn_set_rxon_chain(priv, ctx);
497
498 mutex_unlock(&priv->mutex);
499 IWL_DEBUG_MAC80211(priv, "leave\n");
500
501 ieee80211_resume_disconnect(vif);
502
503 return 1;
504 }
505
506 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
507 {
508 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
509
510 device_set_wakeup_enable(priv->trans->dev, enabled);
511 }
512 #endif
513
514 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
515 struct ieee80211_tx_control *control,
516 struct sk_buff *skb)
517 {
518 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
519
520 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
521 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
522
523 if (iwlagn_tx_skb(priv, control->sta, skb))
524 ieee80211_free_txskb(hw, skb);
525 }
526
527 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
528 struct ieee80211_vif *vif,
529 struct ieee80211_key_conf *keyconf,
530 struct ieee80211_sta *sta,
531 u32 iv32, u16 *phase1key)
532 {
533 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
534
535 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
536 }
537
538 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
539 struct ieee80211_vif *vif,
540 struct ieee80211_sta *sta,
541 struct ieee80211_key_conf *key)
542 {
543 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
544 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
545 struct iwl_rxon_context *ctx = vif_priv->ctx;
546 int ret;
547 bool is_default_wep_key = false;
548
549 IWL_DEBUG_MAC80211(priv, "enter\n");
550
551 if (iwlwifi_mod_params.sw_crypto) {
552 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
553 return -EOPNOTSUPP;
554 }
555
556 switch (key->cipher) {
557 case WLAN_CIPHER_SUITE_TKIP:
558 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
559 /* fall through */
560 case WLAN_CIPHER_SUITE_CCMP:
561 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
562 break;
563 default:
564 break;
565 }
566
567 /*
568 * We could program these keys into the hardware as well, but we
569 * don't expect much multicast traffic in IBSS and having keys
570 * for more stations is probably more useful.
571 *
572 * Mark key TX-only and return 0.
573 */
574 if (vif->type == NL80211_IFTYPE_ADHOC &&
575 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
576 key->hw_key_idx = WEP_INVALID_OFFSET;
577 return 0;
578 }
579
580 /* If they key was TX-only, accept deletion */
581 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
582 return 0;
583
584 mutex_lock(&priv->mutex);
585 iwl_scan_cancel_timeout(priv, 100);
586
587 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
588
589 /*
590 * If we are getting WEP group key and we didn't receive any key mapping
591 * so far, we are in legacy wep mode (group key only), otherwise we are
592 * in 1X mode.
593 * In legacy wep mode, we use another host command to the uCode.
594 */
595 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
596 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
597 if (cmd == SET_KEY)
598 is_default_wep_key = !ctx->key_mapping_keys;
599 else
600 is_default_wep_key =
601 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
602 }
603
604
605 switch (cmd) {
606 case SET_KEY:
607 if (is_default_wep_key) {
608 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
609 break;
610 }
611 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
612 if (ret) {
613 /*
614 * can't add key for RX, but we don't need it
615 * in the device for TX so still return 0
616 */
617 ret = 0;
618 key->hw_key_idx = WEP_INVALID_OFFSET;
619 }
620
621 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
622 break;
623 case DISABLE_KEY:
624 if (is_default_wep_key)
625 ret = iwl_remove_default_wep_key(priv, ctx, key);
626 else
627 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
628
629 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
630 break;
631 default:
632 ret = -EINVAL;
633 }
634
635 mutex_unlock(&priv->mutex);
636 IWL_DEBUG_MAC80211(priv, "leave\n");
637
638 return ret;
639 }
640
641 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
642 struct ieee80211_vif *vif,
643 enum ieee80211_ampdu_mlme_action action,
644 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
645 u8 buf_size)
646 {
647 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
648 int ret = -EINVAL;
649 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
650
651 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
652 sta->addr, tid);
653
654 if (!(priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE))
655 return -EACCES;
656
657 IWL_DEBUG_MAC80211(priv, "enter\n");
658 mutex_lock(&priv->mutex);
659
660 switch (action) {
661 case IEEE80211_AMPDU_RX_START:
662 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
663 break;
664 IWL_DEBUG_HT(priv, "start Rx\n");
665 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
666 break;
667 case IEEE80211_AMPDU_RX_STOP:
668 IWL_DEBUG_HT(priv, "stop Rx\n");
669 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
670 break;
671 case IEEE80211_AMPDU_TX_START:
672 if (!priv->trans->ops->txq_enable)
673 break;
674 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
675 break;
676 IWL_DEBUG_HT(priv, "start Tx\n");
677 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
678 break;
679 case IEEE80211_AMPDU_TX_STOP:
680 IWL_DEBUG_HT(priv, "stop Tx\n");
681 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
682 if ((ret == 0) && (priv->agg_tids_count > 0)) {
683 priv->agg_tids_count--;
684 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
685 priv->agg_tids_count);
686 }
687 if (!priv->agg_tids_count &&
688 priv->hw_params.use_rts_for_aggregation) {
689 /*
690 * switch off RTS/CTS if it was previously enabled
691 */
692 sta_priv->lq_sta.lq.general_params.flags &=
693 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
694 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
695 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
696 }
697 break;
698 case IEEE80211_AMPDU_TX_OPERATIONAL:
699 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
700 break;
701 }
702 mutex_unlock(&priv->mutex);
703 IWL_DEBUG_MAC80211(priv, "leave\n");
704 return ret;
705 }
706
707 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
708 struct ieee80211_vif *vif,
709 struct ieee80211_sta *sta)
710 {
711 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
712 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
713 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
714 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
715 int ret;
716 u8 sta_id;
717
718 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
719 sta->addr);
720 sta_priv->sta_id = IWL_INVALID_STATION;
721
722 atomic_set(&sta_priv->pending_frames, 0);
723 if (vif->type == NL80211_IFTYPE_AP)
724 sta_priv->client = true;
725
726 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
727 is_ap, sta, &sta_id);
728 if (ret) {
729 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
730 sta->addr, ret);
731 /* Should we return success if return code is EEXIST ? */
732 return ret;
733 }
734
735 sta_priv->sta_id = sta_id;
736
737 return 0;
738 }
739
740 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
741 struct ieee80211_vif *vif,
742 struct ieee80211_sta *sta)
743 {
744 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
745 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
746 int ret;
747
748 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
749
750 if (vif->type == NL80211_IFTYPE_STATION) {
751 /*
752 * Station will be removed from device when the RXON
753 * is set to unassociated -- just deactivate it here
754 * to avoid re-programming it.
755 */
756 ret = 0;
757 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
758 } else {
759 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
760 if (ret)
761 IWL_DEBUG_QUIET_RFKILL(priv,
762 "Error removing station %pM\n", sta->addr);
763 }
764 return ret;
765 }
766
767 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
768 struct ieee80211_vif *vif,
769 struct ieee80211_sta *sta,
770 enum ieee80211_sta_state old_state,
771 enum ieee80211_sta_state new_state)
772 {
773 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
774 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
775 enum {
776 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
777 } op = NONE;
778 int ret;
779
780 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
781 sta->addr, old_state, new_state);
782
783 mutex_lock(&priv->mutex);
784 if (vif->type == NL80211_IFTYPE_STATION) {
785 if (old_state == IEEE80211_STA_NOTEXIST &&
786 new_state == IEEE80211_STA_NONE)
787 op = ADD;
788 else if (old_state == IEEE80211_STA_NONE &&
789 new_state == IEEE80211_STA_NOTEXIST)
790 op = REMOVE;
791 else if (old_state == IEEE80211_STA_AUTH &&
792 new_state == IEEE80211_STA_ASSOC)
793 op = HT_RATE_INIT;
794 } else {
795 if (old_state == IEEE80211_STA_AUTH &&
796 new_state == IEEE80211_STA_ASSOC)
797 op = ADD_RATE_INIT;
798 else if (old_state == IEEE80211_STA_ASSOC &&
799 new_state == IEEE80211_STA_AUTH)
800 op = REMOVE;
801 }
802
803 switch (op) {
804 case ADD:
805 ret = iwlagn_mac_sta_add(hw, vif, sta);
806 if (ret)
807 break;
808 /*
809 * Clear the in-progress flag, the AP station entry was added
810 * but we'll initialize LQ only when we've associated (which
811 * would also clear the in-progress flag). This is necessary
812 * in case we never initialize LQ because association fails.
813 */
814 spin_lock_bh(&priv->sta_lock);
815 priv->stations[iwl_sta_id(sta)].used &=
816 ~IWL_STA_UCODE_INPROGRESS;
817 spin_unlock_bh(&priv->sta_lock);
818 break;
819 case REMOVE:
820 ret = iwlagn_mac_sta_remove(hw, vif, sta);
821 break;
822 case ADD_RATE_INIT:
823 ret = iwlagn_mac_sta_add(hw, vif, sta);
824 if (ret)
825 break;
826 /* Initialize rate scaling */
827 IWL_DEBUG_INFO(priv,
828 "Initializing rate scaling for station %pM\n",
829 sta->addr);
830 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
831 ret = 0;
832 break;
833 case HT_RATE_INIT:
834 /* Initialize rate scaling */
835 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
836 if (ret)
837 break;
838 IWL_DEBUG_INFO(priv,
839 "Initializing rate scaling for station %pM\n",
840 sta->addr);
841 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
842 ret = 0;
843 break;
844 default:
845 ret = 0;
846 break;
847 }
848
849 /*
850 * mac80211 might WARN if we fail, but due the way we
851 * (badly) handle hard rfkill, we might fail here
852 */
853 if (iwl_is_rfkill(priv))
854 ret = 0;
855
856 mutex_unlock(&priv->mutex);
857 IWL_DEBUG_MAC80211(priv, "leave\n");
858
859 return ret;
860 }
861
862 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
863 struct ieee80211_channel_switch *ch_switch)
864 {
865 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
866 struct ieee80211_conf *conf = &hw->conf;
867 struct ieee80211_channel *channel = ch_switch->channel;
868 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
869 /*
870 * MULTI-FIXME
871 * When we add support for multiple interfaces, we need to
872 * revisit this. The channel switch command in the device
873 * only affects the BSS context, but what does that really
874 * mean? And what if we get a CSA on the second interface?
875 * This needs a lot of work.
876 */
877 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
878 u16 ch;
879
880 IWL_DEBUG_MAC80211(priv, "enter\n");
881
882 mutex_lock(&priv->mutex);
883
884 if (iwl_is_rfkill(priv))
885 goto out;
886
887 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
888 test_bit(STATUS_SCANNING, &priv->status) ||
889 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
890 goto out;
891
892 if (!iwl_is_associated_ctx(ctx))
893 goto out;
894
895 if (!priv->lib->set_channel_switch)
896 goto out;
897
898 ch = channel->hw_value;
899 if (le16_to_cpu(ctx->active.channel) == ch)
900 goto out;
901
902 priv->current_ht_config.smps = conf->smps_mode;
903
904 /* Configure HT40 channels */
905 ctx->ht.enabled = conf_is_ht(conf);
906 if (ctx->ht.enabled)
907 iwlagn_config_ht40(conf, ctx);
908 else
909 ctx->ht.is_40mhz = false;
910
911 if ((le16_to_cpu(ctx->staging.channel) != ch))
912 ctx->staging.flags = 0;
913
914 iwl_set_rxon_channel(priv, channel, ctx);
915 iwl_set_rxon_ht(priv, ht_conf);
916 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
917
918 /*
919 * at this point, staging_rxon has the
920 * configuration for channel switch
921 */
922 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
923 priv->switch_channel = cpu_to_le16(ch);
924 if (priv->lib->set_channel_switch(priv, ch_switch)) {
925 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
926 priv->switch_channel = 0;
927 ieee80211_chswitch_done(ctx->vif, false);
928 }
929
930 out:
931 mutex_unlock(&priv->mutex);
932 IWL_DEBUG_MAC80211(priv, "leave\n");
933 }
934
935 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
936 {
937 /*
938 * MULTI-FIXME
939 * See iwlagn_mac_channel_switch.
940 */
941 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
942
943 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
944 return;
945
946 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
947 ieee80211_chswitch_done(ctx->vif, is_success);
948 }
949
950 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
951 unsigned int changed_flags,
952 unsigned int *total_flags,
953 u64 multicast)
954 {
955 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
956 __le32 filter_or = 0, filter_nand = 0;
957 struct iwl_rxon_context *ctx;
958
959 #define CHK(test, flag) do { \
960 if (*total_flags & (test)) \
961 filter_or |= (flag); \
962 else \
963 filter_nand |= (flag); \
964 } while (0)
965
966 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
967 changed_flags, *total_flags);
968
969 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
970 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
971 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
972 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
973
974 #undef CHK
975
976 mutex_lock(&priv->mutex);
977
978 for_each_context(priv, ctx) {
979 ctx->staging.filter_flags &= ~filter_nand;
980 ctx->staging.filter_flags |= filter_or;
981
982 /*
983 * Not committing directly because hardware can perform a scan,
984 * but we'll eventually commit the filter flags change anyway.
985 */
986 }
987
988 mutex_unlock(&priv->mutex);
989
990 /*
991 * Receiving all multicast frames is always enabled by the
992 * default flags setup in iwl_connection_init_rx_config()
993 * since we currently do not support programming multicast
994 * filters into the device.
995 */
996 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
997 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
998 }
999
1000 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
1001 {
1002 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1003
1004 mutex_lock(&priv->mutex);
1005 IWL_DEBUG_MAC80211(priv, "enter\n");
1006
1007 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1008 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1009 goto done;
1010 }
1011 if (iwl_is_rfkill(priv)) {
1012 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1013 goto done;
1014 }
1015
1016 /*
1017 * mac80211 will not push any more frames for transmit
1018 * until the flush is completed
1019 */
1020 if (drop) {
1021 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1022 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1023 IWL_ERR(priv, "flush request fail\n");
1024 goto done;
1025 }
1026 }
1027 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1028 iwl_trans_wait_tx_queue_empty(priv->trans);
1029 done:
1030 mutex_unlock(&priv->mutex);
1031 IWL_DEBUG_MAC80211(priv, "leave\n");
1032 }
1033
1034 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1035 struct ieee80211_channel *channel,
1036 enum nl80211_channel_type channel_type,
1037 int duration)
1038 {
1039 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1040 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1041 int err = 0;
1042
1043 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1044 return -EOPNOTSUPP;
1045
1046 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1047 return -EOPNOTSUPP;
1048
1049 IWL_DEBUG_MAC80211(priv, "enter\n");
1050 mutex_lock(&priv->mutex);
1051
1052 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1053 /* mac80211 should not scan while ROC or ROC while scanning */
1054 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1055 err = -EBUSY;
1056 goto out;
1057 }
1058
1059 iwl_scan_cancel_timeout(priv, 100);
1060
1061 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1062 err = -EBUSY;
1063 goto out;
1064 }
1065 }
1066
1067 priv->hw_roc_channel = channel;
1068 priv->hw_roc_chantype = channel_type;
1069 /* convert from ms to TU */
1070 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1071 priv->hw_roc_start_notified = false;
1072 cancel_delayed_work(&priv->hw_roc_disable_work);
1073
1074 if (!ctx->is_active) {
1075 static const struct iwl_qos_info default_qos_data = {
1076 .def_qos_parm = {
1077 .ac[0] = {
1078 .cw_min = cpu_to_le16(3),
1079 .cw_max = cpu_to_le16(7),
1080 .aifsn = 2,
1081 .edca_txop = cpu_to_le16(1504),
1082 },
1083 .ac[1] = {
1084 .cw_min = cpu_to_le16(7),
1085 .cw_max = cpu_to_le16(15),
1086 .aifsn = 2,
1087 .edca_txop = cpu_to_le16(3008),
1088 },
1089 .ac[2] = {
1090 .cw_min = cpu_to_le16(15),
1091 .cw_max = cpu_to_le16(1023),
1092 .aifsn = 3,
1093 },
1094 .ac[3] = {
1095 .cw_min = cpu_to_le16(15),
1096 .cw_max = cpu_to_le16(1023),
1097 .aifsn = 7,
1098 },
1099 },
1100 };
1101
1102 ctx->is_active = true;
1103 ctx->qos_data = default_qos_data;
1104 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1105 memcpy(ctx->staging.node_addr,
1106 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1107 ETH_ALEN);
1108 memcpy(ctx->staging.bssid_addr,
1109 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1110 ETH_ALEN);
1111 err = iwlagn_commit_rxon(priv, ctx);
1112 if (err)
1113 goto out;
1114 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1115 RXON_FILTER_PROMISC_MSK |
1116 RXON_FILTER_CTL2HOST_MSK;
1117
1118 err = iwlagn_commit_rxon(priv, ctx);
1119 if (err) {
1120 iwlagn_disable_roc(priv);
1121 goto out;
1122 }
1123 priv->hw_roc_setup = true;
1124 }
1125
1126 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1127 if (err)
1128 iwlagn_disable_roc(priv);
1129
1130 out:
1131 mutex_unlock(&priv->mutex);
1132 IWL_DEBUG_MAC80211(priv, "leave\n");
1133
1134 return err;
1135 }
1136
1137 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1138 {
1139 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1140
1141 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1142 return -EOPNOTSUPP;
1143
1144 IWL_DEBUG_MAC80211(priv, "enter\n");
1145 mutex_lock(&priv->mutex);
1146 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1147 iwlagn_disable_roc(priv);
1148 mutex_unlock(&priv->mutex);
1149 IWL_DEBUG_MAC80211(priv, "leave\n");
1150
1151 return 0;
1152 }
1153
1154 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1155 enum ieee80211_rssi_event rssi_event)
1156 {
1157 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1158
1159 IWL_DEBUG_MAC80211(priv, "enter\n");
1160 mutex_lock(&priv->mutex);
1161
1162 if (priv->cfg->bt_params &&
1163 priv->cfg->bt_params->advanced_bt_coexist) {
1164 if (rssi_event == RSSI_EVENT_LOW)
1165 priv->bt_enable_pspoll = true;
1166 else if (rssi_event == RSSI_EVENT_HIGH)
1167 priv->bt_enable_pspoll = false;
1168
1169 iwlagn_send_advance_bt_config(priv);
1170 } else {
1171 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1172 "ignoring RSSI callback\n");
1173 }
1174
1175 mutex_unlock(&priv->mutex);
1176 IWL_DEBUG_MAC80211(priv, "leave\n");
1177 }
1178
1179 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1180 struct ieee80211_sta *sta, bool set)
1181 {
1182 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1183
1184 queue_work(priv->workqueue, &priv->beacon_update);
1185
1186 return 0;
1187 }
1188
1189 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1190 struct ieee80211_vif *vif, u16 queue,
1191 const struct ieee80211_tx_queue_params *params)
1192 {
1193 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1194 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1195 struct iwl_rxon_context *ctx = vif_priv->ctx;
1196 int q;
1197
1198 if (WARN_ON(!ctx))
1199 return -EINVAL;
1200
1201 IWL_DEBUG_MAC80211(priv, "enter\n");
1202
1203 if (!iwl_is_ready_rf(priv)) {
1204 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1205 return -EIO;
1206 }
1207
1208 if (queue >= AC_NUM) {
1209 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1210 return 0;
1211 }
1212
1213 q = AC_NUM - 1 - queue;
1214
1215 mutex_lock(&priv->mutex);
1216
1217 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1218 cpu_to_le16(params->cw_min);
1219 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1220 cpu_to_le16(params->cw_max);
1221 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1222 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1223 cpu_to_le16((params->txop * 32));
1224
1225 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1226
1227 mutex_unlock(&priv->mutex);
1228
1229 IWL_DEBUG_MAC80211(priv, "leave\n");
1230 return 0;
1231 }
1232
1233 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1234 {
1235 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1236
1237 return priv->ibss_manager == IWL_IBSS_MANAGER;
1238 }
1239
1240 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1241 {
1242 iwl_connection_init_rx_config(priv, ctx);
1243
1244 iwlagn_set_rxon_chain(priv, ctx);
1245
1246 return iwlagn_commit_rxon(priv, ctx);
1247 }
1248
1249 static int iwl_setup_interface(struct iwl_priv *priv,
1250 struct iwl_rxon_context *ctx)
1251 {
1252 struct ieee80211_vif *vif = ctx->vif;
1253 int err, ac;
1254
1255 lockdep_assert_held(&priv->mutex);
1256
1257 /*
1258 * This variable will be correct only when there's just
1259 * a single context, but all code using it is for hardware
1260 * that supports only one context.
1261 */
1262 priv->iw_mode = vif->type;
1263
1264 ctx->is_active = true;
1265
1266 err = iwl_set_mode(priv, ctx);
1267 if (err) {
1268 if (!ctx->always_active)
1269 ctx->is_active = false;
1270 return err;
1271 }
1272
1273 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1274 vif->type == NL80211_IFTYPE_ADHOC) {
1275 /*
1276 * pretend to have high BT traffic as long as we
1277 * are operating in IBSS mode, as this will cause
1278 * the rate scaling etc. to behave as intended.
1279 */
1280 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1281 }
1282
1283 /* set up queue mappings */
1284 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1285 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1286
1287 if (vif->type == NL80211_IFTYPE_AP)
1288 vif->cab_queue = ctx->mcast_queue;
1289 else
1290 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1291
1292 return 0;
1293 }
1294
1295 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1296 struct ieee80211_vif *vif)
1297 {
1298 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1299 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1300 struct iwl_rxon_context *tmp, *ctx = NULL;
1301 int err;
1302 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1303 bool reset = false;
1304
1305 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1306 viftype, vif->addr);
1307
1308 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1309
1310 mutex_lock(&priv->mutex);
1311
1312 iwlagn_disable_roc(priv);
1313
1314 if (!iwl_is_ready_rf(priv)) {
1315 IWL_WARN(priv, "Try to add interface when device not ready\n");
1316 err = -EINVAL;
1317 goto out;
1318 }
1319
1320 for_each_context(priv, tmp) {
1321 u32 possible_modes =
1322 tmp->interface_modes | tmp->exclusive_interface_modes;
1323
1324 if (tmp->vif) {
1325 /* On reset we need to add the same interface again */
1326 if (tmp->vif == vif) {
1327 reset = true;
1328 ctx = tmp;
1329 break;
1330 }
1331
1332 /* check if this busy context is exclusive */
1333 if (tmp->exclusive_interface_modes &
1334 BIT(tmp->vif->type)) {
1335 err = -EINVAL;
1336 goto out;
1337 }
1338 continue;
1339 }
1340
1341 if (!(possible_modes & BIT(viftype)))
1342 continue;
1343
1344 /* have maybe usable context w/o interface */
1345 ctx = tmp;
1346 break;
1347 }
1348
1349 if (!ctx) {
1350 err = -EOPNOTSUPP;
1351 goto out;
1352 }
1353
1354 vif_priv->ctx = ctx;
1355 ctx->vif = vif;
1356
1357 err = iwl_setup_interface(priv, ctx);
1358 if (!err || reset)
1359 goto out;
1360
1361 ctx->vif = NULL;
1362 priv->iw_mode = NL80211_IFTYPE_STATION;
1363 out:
1364 mutex_unlock(&priv->mutex);
1365
1366 IWL_DEBUG_MAC80211(priv, "leave\n");
1367 return err;
1368 }
1369
1370 static void iwl_teardown_interface(struct iwl_priv *priv,
1371 struct ieee80211_vif *vif,
1372 bool mode_change)
1373 {
1374 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1375
1376 lockdep_assert_held(&priv->mutex);
1377
1378 if (priv->scan_vif == vif) {
1379 iwl_scan_cancel_timeout(priv, 200);
1380 iwl_force_scan_end(priv);
1381 }
1382
1383 if (!mode_change) {
1384 iwl_set_mode(priv, ctx);
1385 if (!ctx->always_active)
1386 ctx->is_active = false;
1387 }
1388
1389 /*
1390 * When removing the IBSS interface, overwrite the
1391 * BT traffic load with the stored one from the last
1392 * notification, if any. If this is a device that
1393 * doesn't implement this, this has no effect since
1394 * both values are the same and zero.
1395 */
1396 if (vif->type == NL80211_IFTYPE_ADHOC)
1397 priv->bt_traffic_load = priv->last_bt_traffic_load;
1398 }
1399
1400 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1401 struct ieee80211_vif *vif)
1402 {
1403 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1404 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1405
1406 IWL_DEBUG_MAC80211(priv, "enter\n");
1407
1408 mutex_lock(&priv->mutex);
1409
1410 if (WARN_ON(ctx->vif != vif)) {
1411 struct iwl_rxon_context *tmp;
1412 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1413 for_each_context(priv, tmp)
1414 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1415 tmp->ctxid, tmp, tmp->vif);
1416 }
1417 ctx->vif = NULL;
1418
1419 iwl_teardown_interface(priv, vif, false);
1420
1421 mutex_unlock(&priv->mutex);
1422
1423 IWL_DEBUG_MAC80211(priv, "leave\n");
1424
1425 }
1426
1427 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1428 struct ieee80211_vif *vif,
1429 enum nl80211_iftype newtype, bool newp2p)
1430 {
1431 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1432 struct iwl_rxon_context *ctx, *tmp;
1433 enum nl80211_iftype newviftype = newtype;
1434 u32 interface_modes;
1435 int err;
1436
1437 IWL_DEBUG_MAC80211(priv, "enter\n");
1438
1439 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1440
1441 mutex_lock(&priv->mutex);
1442
1443 ctx = iwl_rxon_ctx_from_vif(vif);
1444
1445 /*
1446 * To simplify this code, only support changes on the
1447 * BSS context. The PAN context is usually reassigned
1448 * by creating/removing P2P interfaces anyway.
1449 */
1450 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1451 err = -EBUSY;
1452 goto out;
1453 }
1454
1455 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1456 /*
1457 * Huh? But wait ... this can maybe happen when
1458 * we're in the middle of a firmware restart!
1459 */
1460 err = -EBUSY;
1461 goto out;
1462 }
1463
1464 /* Check if the switch is supported in the same context */
1465 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1466 if (!(interface_modes & BIT(newtype))) {
1467 err = -EBUSY;
1468 goto out;
1469 }
1470
1471 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1472 for_each_context(priv, tmp) {
1473 if (ctx == tmp)
1474 continue;
1475
1476 if (!tmp->is_active)
1477 continue;
1478
1479 /*
1480 * The current mode switch would be exclusive, but
1481 * another context is active ... refuse the switch.
1482 */
1483 err = -EBUSY;
1484 goto out;
1485 }
1486 }
1487
1488 /* success */
1489 iwl_teardown_interface(priv, vif, true);
1490 vif->type = newviftype;
1491 vif->p2p = newp2p;
1492 err = iwl_setup_interface(priv, ctx);
1493 WARN_ON(err);
1494 /*
1495 * We've switched internally, but submitting to the
1496 * device may have failed for some reason. Mask this
1497 * error, because otherwise mac80211 will not switch
1498 * (and set the interface type back) and we'll be
1499 * out of sync with it.
1500 */
1501 err = 0;
1502
1503 out:
1504 mutex_unlock(&priv->mutex);
1505 IWL_DEBUG_MAC80211(priv, "leave\n");
1506
1507 return err;
1508 }
1509
1510 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1511 struct ieee80211_vif *vif,
1512 struct cfg80211_scan_request *req)
1513 {
1514 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1515 int ret;
1516
1517 IWL_DEBUG_MAC80211(priv, "enter\n");
1518
1519 if (req->n_channels == 0)
1520 return -EINVAL;
1521
1522 mutex_lock(&priv->mutex);
1523
1524 /*
1525 * If an internal scan is in progress, just set
1526 * up the scan_request as per above.
1527 */
1528 if (priv->scan_type != IWL_SCAN_NORMAL) {
1529 IWL_DEBUG_SCAN(priv,
1530 "SCAN request during internal scan - defer\n");
1531 priv->scan_request = req;
1532 priv->scan_vif = vif;
1533 ret = 0;
1534 } else {
1535 priv->scan_request = req;
1536 priv->scan_vif = vif;
1537 /*
1538 * mac80211 will only ask for one band at a time
1539 * so using channels[0] here is ok
1540 */
1541 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1542 req->channels[0]->band);
1543 if (ret) {
1544 priv->scan_request = NULL;
1545 priv->scan_vif = NULL;
1546 }
1547 }
1548
1549 IWL_DEBUG_MAC80211(priv, "leave\n");
1550
1551 mutex_unlock(&priv->mutex);
1552
1553 return ret;
1554 }
1555
1556 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1557 {
1558 struct iwl_addsta_cmd cmd = {
1559 .mode = STA_CONTROL_MODIFY_MSK,
1560 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1561 .sta.sta_id = sta_id,
1562 };
1563
1564 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1565 }
1566
1567 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1568 struct ieee80211_vif *vif,
1569 enum sta_notify_cmd cmd,
1570 struct ieee80211_sta *sta)
1571 {
1572 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1573 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1574 int sta_id;
1575
1576 IWL_DEBUG_MAC80211(priv, "enter\n");
1577
1578 switch (cmd) {
1579 case STA_NOTIFY_SLEEP:
1580 WARN_ON(!sta_priv->client);
1581 sta_priv->asleep = true;
1582 if (atomic_read(&sta_priv->pending_frames) > 0)
1583 ieee80211_sta_block_awake(hw, sta, true);
1584 break;
1585 case STA_NOTIFY_AWAKE:
1586 WARN_ON(!sta_priv->client);
1587 if (!sta_priv->asleep)
1588 break;
1589 sta_priv->asleep = false;
1590 sta_id = iwl_sta_id(sta);
1591 if (sta_id != IWL_INVALID_STATION)
1592 iwl_sta_modify_ps_wake(priv, sta_id);
1593 break;
1594 default:
1595 break;
1596 }
1597 IWL_DEBUG_MAC80211(priv, "leave\n");
1598 }
1599
1600 struct ieee80211_ops iwlagn_hw_ops = {
1601 .tx = iwlagn_mac_tx,
1602 .start = iwlagn_mac_start,
1603 .stop = iwlagn_mac_stop,
1604 #ifdef CONFIG_PM_SLEEP
1605 .suspend = iwlagn_mac_suspend,
1606 .resume = iwlagn_mac_resume,
1607 .set_wakeup = iwlagn_mac_set_wakeup,
1608 #endif
1609 .add_interface = iwlagn_mac_add_interface,
1610 .remove_interface = iwlagn_mac_remove_interface,
1611 .change_interface = iwlagn_mac_change_interface,
1612 .config = iwlagn_mac_config,
1613 .configure_filter = iwlagn_configure_filter,
1614 .set_key = iwlagn_mac_set_key,
1615 .update_tkip_key = iwlagn_mac_update_tkip_key,
1616 .set_rekey_data = iwlagn_mac_set_rekey_data,
1617 .conf_tx = iwlagn_mac_conf_tx,
1618 .bss_info_changed = iwlagn_bss_info_changed,
1619 .ampdu_action = iwlagn_mac_ampdu_action,
1620 .hw_scan = iwlagn_mac_hw_scan,
1621 .sta_notify = iwlagn_mac_sta_notify,
1622 .sta_state = iwlagn_mac_sta_state,
1623 .channel_switch = iwlagn_mac_channel_switch,
1624 .flush = iwlagn_mac_flush,
1625 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1626 .remain_on_channel = iwlagn_mac_remain_on_channel,
1627 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1628 .rssi_callback = iwlagn_mac_rssi_callback,
1629 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1630 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1631 .set_tim = iwlagn_mac_set_tim,
1632 };
1633
1634 /* This function both allocates and initializes hw and priv. */
1635 struct ieee80211_hw *iwl_alloc_all(void)
1636 {
1637 struct iwl_priv *priv;
1638 struct iwl_op_mode *op_mode;
1639 /* mac80211 allocates memory for this device instance, including
1640 * space for this driver's private structure */
1641 struct ieee80211_hw *hw;
1642
1643 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1644 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1645 if (!hw)
1646 goto out;
1647
1648 op_mode = hw->priv;
1649 priv = IWL_OP_MODE_GET_DVM(op_mode);
1650 priv->hw = hw;
1651
1652 out:
1653 return hw;
1654 }
Linux kernel - Deliverables
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