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mac80211: make remain_on_channel() op pass vif param
[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 dev_kfree_skb_any(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_vif *vif,
1036 struct ieee80211_channel *channel,
1037 enum nl80211_channel_type channel_type,
1038 int duration)
1039 {
1040 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1041 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1042 int err = 0;
1043
1044 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1045 return -EOPNOTSUPP;
1046
1047 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1048 return -EOPNOTSUPP;
1049
1050 IWL_DEBUG_MAC80211(priv, "enter\n");
1051 mutex_lock(&priv->mutex);
1052
1053 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1054 /* mac80211 should not scan while ROC or ROC while scanning */
1055 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1056 err = -EBUSY;
1057 goto out;
1058 }
1059
1060 iwl_scan_cancel_timeout(priv, 100);
1061
1062 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1063 err = -EBUSY;
1064 goto out;
1065 }
1066 }
1067
1068 priv->hw_roc_channel = channel;
1069 priv->hw_roc_chantype = channel_type;
1070 /* convert from ms to TU */
1071 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1072 priv->hw_roc_start_notified = false;
1073 cancel_delayed_work(&priv->hw_roc_disable_work);
1074
1075 if (!ctx->is_active) {
1076 static const struct iwl_qos_info default_qos_data = {
1077 .def_qos_parm = {
1078 .ac[0] = {
1079 .cw_min = cpu_to_le16(3),
1080 .cw_max = cpu_to_le16(7),
1081 .aifsn = 2,
1082 .edca_txop = cpu_to_le16(1504),
1083 },
1084 .ac[1] = {
1085 .cw_min = cpu_to_le16(7),
1086 .cw_max = cpu_to_le16(15),
1087 .aifsn = 2,
1088 .edca_txop = cpu_to_le16(3008),
1089 },
1090 .ac[2] = {
1091 .cw_min = cpu_to_le16(15),
1092 .cw_max = cpu_to_le16(1023),
1093 .aifsn = 3,
1094 },
1095 .ac[3] = {
1096 .cw_min = cpu_to_le16(15),
1097 .cw_max = cpu_to_le16(1023),
1098 .aifsn = 7,
1099 },
1100 },
1101 };
1102
1103 ctx->is_active = true;
1104 ctx->qos_data = default_qos_data;
1105 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1106 memcpy(ctx->staging.node_addr,
1107 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1108 ETH_ALEN);
1109 memcpy(ctx->staging.bssid_addr,
1110 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1111 ETH_ALEN);
1112 err = iwlagn_commit_rxon(priv, ctx);
1113 if (err)
1114 goto out;
1115 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1116 RXON_FILTER_PROMISC_MSK |
1117 RXON_FILTER_CTL2HOST_MSK;
1118
1119 err = iwlagn_commit_rxon(priv, ctx);
1120 if (err) {
1121 iwlagn_disable_roc(priv);
1122 goto out;
1123 }
1124 priv->hw_roc_setup = true;
1125 }
1126
1127 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1128 if (err)
1129 iwlagn_disable_roc(priv);
1130
1131 out:
1132 mutex_unlock(&priv->mutex);
1133 IWL_DEBUG_MAC80211(priv, "leave\n");
1134
1135 return err;
1136 }
1137
1138 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1139 {
1140 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1141
1142 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1143 return -EOPNOTSUPP;
1144
1145 IWL_DEBUG_MAC80211(priv, "enter\n");
1146 mutex_lock(&priv->mutex);
1147 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1148 iwlagn_disable_roc(priv);
1149 mutex_unlock(&priv->mutex);
1150 IWL_DEBUG_MAC80211(priv, "leave\n");
1151
1152 return 0;
1153 }
1154
1155 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1156 enum ieee80211_rssi_event rssi_event)
1157 {
1158 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1159
1160 IWL_DEBUG_MAC80211(priv, "enter\n");
1161 mutex_lock(&priv->mutex);
1162
1163 if (priv->cfg->bt_params &&
1164 priv->cfg->bt_params->advanced_bt_coexist) {
1165 if (rssi_event == RSSI_EVENT_LOW)
1166 priv->bt_enable_pspoll = true;
1167 else if (rssi_event == RSSI_EVENT_HIGH)
1168 priv->bt_enable_pspoll = false;
1169
1170 iwlagn_send_advance_bt_config(priv);
1171 } else {
1172 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1173 "ignoring RSSI callback\n");
1174 }
1175
1176 mutex_unlock(&priv->mutex);
1177 IWL_DEBUG_MAC80211(priv, "leave\n");
1178 }
1179
1180 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1181 struct ieee80211_sta *sta, bool set)
1182 {
1183 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1184
1185 queue_work(priv->workqueue, &priv->beacon_update);
1186
1187 return 0;
1188 }
1189
1190 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1191 struct ieee80211_vif *vif, u16 queue,
1192 const struct ieee80211_tx_queue_params *params)
1193 {
1194 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1195 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1196 struct iwl_rxon_context *ctx = vif_priv->ctx;
1197 int q;
1198
1199 if (WARN_ON(!ctx))
1200 return -EINVAL;
1201
1202 IWL_DEBUG_MAC80211(priv, "enter\n");
1203
1204 if (!iwl_is_ready_rf(priv)) {
1205 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1206 return -EIO;
1207 }
1208
1209 if (queue >= AC_NUM) {
1210 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1211 return 0;
1212 }
1213
1214 q = AC_NUM - 1 - queue;
1215
1216 mutex_lock(&priv->mutex);
1217
1218 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1219 cpu_to_le16(params->cw_min);
1220 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1221 cpu_to_le16(params->cw_max);
1222 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1223 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1224 cpu_to_le16((params->txop * 32));
1225
1226 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1227
1228 mutex_unlock(&priv->mutex);
1229
1230 IWL_DEBUG_MAC80211(priv, "leave\n");
1231 return 0;
1232 }
1233
1234 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1235 {
1236 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1237
1238 return priv->ibss_manager == IWL_IBSS_MANAGER;
1239 }
1240
1241 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1242 {
1243 iwl_connection_init_rx_config(priv, ctx);
1244
1245 iwlagn_set_rxon_chain(priv, ctx);
1246
1247 return iwlagn_commit_rxon(priv, ctx);
1248 }
1249
1250 static int iwl_setup_interface(struct iwl_priv *priv,
1251 struct iwl_rxon_context *ctx)
1252 {
1253 struct ieee80211_vif *vif = ctx->vif;
1254 int err, ac;
1255
1256 lockdep_assert_held(&priv->mutex);
1257
1258 /*
1259 * This variable will be correct only when there's just
1260 * a single context, but all code using it is for hardware
1261 * that supports only one context.
1262 */
1263 priv->iw_mode = vif->type;
1264
1265 ctx->is_active = true;
1266
1267 err = iwl_set_mode(priv, ctx);
1268 if (err) {
1269 if (!ctx->always_active)
1270 ctx->is_active = false;
1271 return err;
1272 }
1273
1274 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1275 vif->type == NL80211_IFTYPE_ADHOC) {
1276 /*
1277 * pretend to have high BT traffic as long as we
1278 * are operating in IBSS mode, as this will cause
1279 * the rate scaling etc. to behave as intended.
1280 */
1281 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1282 }
1283
1284 /* set up queue mappings */
1285 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1286 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1287
1288 if (vif->type == NL80211_IFTYPE_AP)
1289 vif->cab_queue = ctx->mcast_queue;
1290 else
1291 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1292
1293 return 0;
1294 }
1295
1296 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1297 struct ieee80211_vif *vif)
1298 {
1299 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1300 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1301 struct iwl_rxon_context *tmp, *ctx = NULL;
1302 int err;
1303 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1304 bool reset = false;
1305
1306 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1307 viftype, vif->addr);
1308
1309 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1310
1311 mutex_lock(&priv->mutex);
1312
1313 iwlagn_disable_roc(priv);
1314
1315 if (!iwl_is_ready_rf(priv)) {
1316 IWL_WARN(priv, "Try to add interface when device not ready\n");
1317 err = -EINVAL;
1318 goto out;
1319 }
1320
1321 for_each_context(priv, tmp) {
1322 u32 possible_modes =
1323 tmp->interface_modes | tmp->exclusive_interface_modes;
1324
1325 if (tmp->vif) {
1326 /* On reset we need to add the same interface again */
1327 if (tmp->vif == vif) {
1328 reset = true;
1329 ctx = tmp;
1330 break;
1331 }
1332
1333 /* check if this busy context is exclusive */
1334 if (tmp->exclusive_interface_modes &
1335 BIT(tmp->vif->type)) {
1336 err = -EINVAL;
1337 goto out;
1338 }
1339 continue;
1340 }
1341
1342 if (!(possible_modes & BIT(viftype)))
1343 continue;
1344
1345 /* have maybe usable context w/o interface */
1346 ctx = tmp;
1347 break;
1348 }
1349
1350 if (!ctx) {
1351 err = -EOPNOTSUPP;
1352 goto out;
1353 }
1354
1355 vif_priv->ctx = ctx;
1356 ctx->vif = vif;
1357
1358 err = iwl_setup_interface(priv, ctx);
1359 if (!err || reset)
1360 goto out;
1361
1362 ctx->vif = NULL;
1363 priv->iw_mode = NL80211_IFTYPE_STATION;
1364 out:
1365 mutex_unlock(&priv->mutex);
1366
1367 IWL_DEBUG_MAC80211(priv, "leave\n");
1368 return err;
1369 }
1370
1371 static void iwl_teardown_interface(struct iwl_priv *priv,
1372 struct ieee80211_vif *vif,
1373 bool mode_change)
1374 {
1375 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1376
1377 lockdep_assert_held(&priv->mutex);
1378
1379 if (priv->scan_vif == vif) {
1380 iwl_scan_cancel_timeout(priv, 200);
1381 iwl_force_scan_end(priv);
1382 }
1383
1384 if (!mode_change) {
1385 iwl_set_mode(priv, ctx);
1386 if (!ctx->always_active)
1387 ctx->is_active = false;
1388 }
1389
1390 /*
1391 * When removing the IBSS interface, overwrite the
1392 * BT traffic load with the stored one from the last
1393 * notification, if any. If this is a device that
1394 * doesn't implement this, this has no effect since
1395 * both values are the same and zero.
1396 */
1397 if (vif->type == NL80211_IFTYPE_ADHOC)
1398 priv->bt_traffic_load = priv->last_bt_traffic_load;
1399 }
1400
1401 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1402 struct ieee80211_vif *vif)
1403 {
1404 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1405 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1406
1407 IWL_DEBUG_MAC80211(priv, "enter\n");
1408
1409 mutex_lock(&priv->mutex);
1410
1411 if (WARN_ON(ctx->vif != vif)) {
1412 struct iwl_rxon_context *tmp;
1413 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1414 for_each_context(priv, tmp)
1415 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1416 tmp->ctxid, tmp, tmp->vif);
1417 }
1418 ctx->vif = NULL;
1419
1420 iwl_teardown_interface(priv, vif, false);
1421
1422 mutex_unlock(&priv->mutex);
1423
1424 IWL_DEBUG_MAC80211(priv, "leave\n");
1425
1426 }
1427
1428 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1429 struct ieee80211_vif *vif,
1430 enum nl80211_iftype newtype, bool newp2p)
1431 {
1432 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1433 struct iwl_rxon_context *ctx, *tmp;
1434 enum nl80211_iftype newviftype = newtype;
1435 u32 interface_modes;
1436 int err;
1437
1438 IWL_DEBUG_MAC80211(priv, "enter\n");
1439
1440 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1441
1442 mutex_lock(&priv->mutex);
1443
1444 ctx = iwl_rxon_ctx_from_vif(vif);
1445
1446 /*
1447 * To simplify this code, only support changes on the
1448 * BSS context. The PAN context is usually reassigned
1449 * by creating/removing P2P interfaces anyway.
1450 */
1451 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1452 err = -EBUSY;
1453 goto out;
1454 }
1455
1456 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1457 /*
1458 * Huh? But wait ... this can maybe happen when
1459 * we're in the middle of a firmware restart!
1460 */
1461 err = -EBUSY;
1462 goto out;
1463 }
1464
1465 /* Check if the switch is supported in the same context */
1466 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1467 if (!(interface_modes & BIT(newtype))) {
1468 err = -EBUSY;
1469 goto out;
1470 }
1471
1472 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1473 for_each_context(priv, tmp) {
1474 if (ctx == tmp)
1475 continue;
1476
1477 if (!tmp->is_active)
1478 continue;
1479
1480 /*
1481 * The current mode switch would be exclusive, but
1482 * another context is active ... refuse the switch.
1483 */
1484 err = -EBUSY;
1485 goto out;
1486 }
1487 }
1488
1489 /* success */
1490 iwl_teardown_interface(priv, vif, true);
1491 vif->type = newviftype;
1492 vif->p2p = newp2p;
1493 err = iwl_setup_interface(priv, ctx);
1494 WARN_ON(err);
1495 /*
1496 * We've switched internally, but submitting to the
1497 * device may have failed for some reason. Mask this
1498 * error, because otherwise mac80211 will not switch
1499 * (and set the interface type back) and we'll be
1500 * out of sync with it.
1501 */
1502 err = 0;
1503
1504 out:
1505 mutex_unlock(&priv->mutex);
1506 IWL_DEBUG_MAC80211(priv, "leave\n");
1507
1508 return err;
1509 }
1510
1511 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1512 struct ieee80211_vif *vif,
1513 struct cfg80211_scan_request *req)
1514 {
1515 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1516 int ret;
1517
1518 IWL_DEBUG_MAC80211(priv, "enter\n");
1519
1520 if (req->n_channels == 0)
1521 return -EINVAL;
1522
1523 mutex_lock(&priv->mutex);
1524
1525 /*
1526 * If an internal scan is in progress, just set
1527 * up the scan_request as per above.
1528 */
1529 if (priv->scan_type != IWL_SCAN_NORMAL) {
1530 IWL_DEBUG_SCAN(priv,
1531 "SCAN request during internal scan - defer\n");
1532 priv->scan_request = req;
1533 priv->scan_vif = vif;
1534 ret = 0;
1535 } else {
1536 priv->scan_request = req;
1537 priv->scan_vif = vif;
1538 /*
1539 * mac80211 will only ask for one band at a time
1540 * so using channels[0] here is ok
1541 */
1542 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1543 req->channels[0]->band);
1544 if (ret) {
1545 priv->scan_request = NULL;
1546 priv->scan_vif = NULL;
1547 }
1548 }
1549
1550 IWL_DEBUG_MAC80211(priv, "leave\n");
1551
1552 mutex_unlock(&priv->mutex);
1553
1554 return ret;
1555 }
1556
1557 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1558 {
1559 struct iwl_addsta_cmd cmd = {
1560 .mode = STA_CONTROL_MODIFY_MSK,
1561 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1562 .sta.sta_id = sta_id,
1563 };
1564
1565 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1566 }
1567
1568 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1569 struct ieee80211_vif *vif,
1570 enum sta_notify_cmd cmd,
1571 struct ieee80211_sta *sta)
1572 {
1573 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1574 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1575 int sta_id;
1576
1577 IWL_DEBUG_MAC80211(priv, "enter\n");
1578
1579 switch (cmd) {
1580 case STA_NOTIFY_SLEEP:
1581 WARN_ON(!sta_priv->client);
1582 sta_priv->asleep = true;
1583 if (atomic_read(&sta_priv->pending_frames) > 0)
1584 ieee80211_sta_block_awake(hw, sta, true);
1585 break;
1586 case STA_NOTIFY_AWAKE:
1587 WARN_ON(!sta_priv->client);
1588 if (!sta_priv->asleep)
1589 break;
1590 sta_priv->asleep = false;
1591 sta_id = iwl_sta_id(sta);
1592 if (sta_id != IWL_INVALID_STATION)
1593 iwl_sta_modify_ps_wake(priv, sta_id);
1594 break;
1595 default:
1596 break;
1597 }
1598 IWL_DEBUG_MAC80211(priv, "leave\n");
1599 }
1600
1601 struct ieee80211_ops iwlagn_hw_ops = {
1602 .tx = iwlagn_mac_tx,
1603 .start = iwlagn_mac_start,
1604 .stop = iwlagn_mac_stop,
1605 #ifdef CONFIG_PM_SLEEP
1606 .suspend = iwlagn_mac_suspend,
1607 .resume = iwlagn_mac_resume,
1608 .set_wakeup = iwlagn_mac_set_wakeup,
1609 #endif
1610 .add_interface = iwlagn_mac_add_interface,
1611 .remove_interface = iwlagn_mac_remove_interface,
1612 .change_interface = iwlagn_mac_change_interface,
1613 .config = iwlagn_mac_config,
1614 .configure_filter = iwlagn_configure_filter,
1615 .set_key = iwlagn_mac_set_key,
1616 .update_tkip_key = iwlagn_mac_update_tkip_key,
1617 .set_rekey_data = iwlagn_mac_set_rekey_data,
1618 .conf_tx = iwlagn_mac_conf_tx,
1619 .bss_info_changed = iwlagn_bss_info_changed,
1620 .ampdu_action = iwlagn_mac_ampdu_action,
1621 .hw_scan = iwlagn_mac_hw_scan,
1622 .sta_notify = iwlagn_mac_sta_notify,
1623 .sta_state = iwlagn_mac_sta_state,
1624 .channel_switch = iwlagn_mac_channel_switch,
1625 .flush = iwlagn_mac_flush,
1626 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1627 .remain_on_channel = iwlagn_mac_remain_on_channel,
1628 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1629 .rssi_callback = iwlagn_mac_rssi_callback,
1630 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1631 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1632 .set_tim = iwlagn_mac_set_tim,
1633 };
1634
1635 /* This function both allocates and initializes hw and priv. */
1636 struct ieee80211_hw *iwl_alloc_all(void)
1637 {
1638 struct iwl_priv *priv;
1639 struct iwl_op_mode *op_mode;
1640 /* mac80211 allocates memory for this device instance, including
1641 * space for this driver's private structure */
1642 struct ieee80211_hw *hw;
1643
1644 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1645 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1646 if (!hw)
1647 goto out;
1648
1649 op_mode = hw->priv;
1650 priv = IWL_OP_MODE_GET_DVM(op_mode);
1651 priv->hw = hw;
1652
1653 out:
1654 return hw;
1655 }
Linux kernel - Deliverables
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