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Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfc...
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-mac80211.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/dma-mapping.h>
34 #include <linux/delay.h>
35 #include <linux/sched.h>
36 #include <linux/skbuff.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/if_arp.h>
40
41 #include <net/mac80211.h>
42
43 #include <asm/div64.h>
44
45 #include "iwl-eeprom.h"
46 #include "iwl-dev.h"
47 #include "iwl-core.h"
48 #include "iwl-io.h"
49 #include "iwl-agn-calib.h"
50 #include "iwl-agn.h"
51 #include "iwl-shared.h"
52 #include "iwl-trans.h"
53 #include "iwl-op-mode.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
152 /*
153 * Including the following line will crash some AP's. This
154 * workaround removes the stimulus which causes the crash until
155 * the AP software can be fixed.
156 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
157 */
158
159 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
160 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
161
162 if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
163 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
164 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
165
166 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
167 /* enable 11w if the uCode advertise */
168 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
169 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
170 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
171
172 hw->sta_data_size = sizeof(struct iwl_station_priv);
173 hw->vif_data_size = sizeof(struct iwl_vif_priv);
174
175 for_each_context(priv, ctx) {
176 hw->wiphy->interface_modes |= ctx->interface_modes;
177 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
178 }
179
180 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
181
182 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
183 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
184 hw->wiphy->n_iface_combinations =
185 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
186 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
187 hw->wiphy->iface_combinations =
188 iwlagn_iface_combinations_dualmode;
189 hw->wiphy->n_iface_combinations =
190 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
191 }
192
193 hw->wiphy->max_remain_on_channel_duration = 1000;
194
195 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
196 WIPHY_FLAG_DISABLE_BEACON_HINTS |
197 WIPHY_FLAG_IBSS_RSN;
198
199 if (priv->fw->ucode_wowlan.code.len &&
200 trans(priv)->ops->wowlan_suspend &&
201 device_can_wakeup(trans(priv)->dev)) {
202 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
203 WIPHY_WOWLAN_DISCONNECT |
204 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
205 WIPHY_WOWLAN_RFKILL_RELEASE;
206 if (!iwlagn_mod_params.sw_crypto)
207 hw->wiphy->wowlan.flags |=
208 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
209 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
210
211 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
212 hw->wiphy->wowlan.pattern_min_len =
213 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
214 hw->wiphy->wowlan.pattern_max_len =
215 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
216 }
217
218 if (iwlagn_mod_params.power_save)
219 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
220 else
221 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
222
223 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
224 /* we create the 802.11 header and a zero-length SSID element */
225 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
226
227 /* Default value; 4 EDCA QOS priorities */
228 hw->queues = 4;
229
230 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
231
232 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
233 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
234 &priv->bands[IEEE80211_BAND_2GHZ];
235 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
236 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
237 &priv->bands[IEEE80211_BAND_5GHZ];
238
239 hw->wiphy->hw_version = trans(priv)->hw_id;
240
241 iwl_leds_init(priv);
242
243 ret = ieee80211_register_hw(priv->hw);
244 if (ret) {
245 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
246 return ret;
247 }
248 priv->mac80211_registered = 1;
249
250 return 0;
251 }
252
253 void iwlagn_mac_unregister(struct iwl_priv *priv)
254 {
255 if (!priv->mac80211_registered)
256 return;
257 iwl_leds_exit(priv);
258 ieee80211_unregister_hw(priv->hw);
259 priv->mac80211_registered = 0;
260 }
261
262 static int __iwl_up(struct iwl_priv *priv)
263 {
264 struct iwl_rxon_context *ctx;
265 int ret;
266
267 lockdep_assert_held(&priv->mutex);
268
269 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
270 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
271 return -EIO;
272 }
273
274 for_each_context(priv, ctx) {
275 ret = iwlagn_alloc_bcast_station(priv, ctx);
276 if (ret) {
277 iwl_dealloc_bcast_stations(priv);
278 return ret;
279 }
280 }
281
282 ret = iwl_run_init_ucode(priv);
283 if (ret) {
284 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
285 goto error;
286 }
287
288 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
289 if (ret) {
290 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
291 goto error;
292 }
293
294 ret = iwl_alive_start(priv);
295 if (ret)
296 goto error;
297 return 0;
298
299 error:
300 set_bit(STATUS_EXIT_PENDING, &priv->status);
301 iwl_down(priv);
302 clear_bit(STATUS_EXIT_PENDING, &priv->status);
303
304 IWL_ERR(priv, "Unable to initialize device.\n");
305 return ret;
306 }
307
308 static int iwlagn_mac_start(struct ieee80211_hw *hw)
309 {
310 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
311 int ret;
312
313 IWL_DEBUG_MAC80211(priv, "enter\n");
314
315 /* we should be verifying the device is ready to be opened */
316 mutex_lock(&priv->mutex);
317 ret = __iwl_up(priv);
318 mutex_unlock(&priv->mutex);
319 if (ret)
320 return ret;
321
322 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
323
324 /* Now we should be done, and the READY bit should be set. */
325 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
326 ret = -EIO;
327
328 iwlagn_led_enable(priv);
329
330 priv->is_open = 1;
331 IWL_DEBUG_MAC80211(priv, "leave\n");
332 return 0;
333 }
334
335 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
336 {
337 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
338
339 IWL_DEBUG_MAC80211(priv, "enter\n");
340
341 if (!priv->is_open)
342 return;
343
344 priv->is_open = 0;
345
346 mutex_lock(&priv->mutex);
347 iwl_down(priv);
348 mutex_unlock(&priv->mutex);
349
350 iwl_cancel_deferred_work(priv);
351
352 flush_workqueue(priv->workqueue);
353
354 /* User space software may expect getting rfkill changes
355 * even if interface is down, trans->down will leave the RF
356 * kill interrupt enabled
357 */
358 iwl_trans_stop_hw(trans(priv));
359
360 IWL_DEBUG_MAC80211(priv, "leave\n");
361 }
362
363 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
364 struct ieee80211_vif *vif,
365 struct cfg80211_gtk_rekey_data *data)
366 {
367 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
368
369 if (iwlagn_mod_params.sw_crypto)
370 return;
371
372 IWL_DEBUG_MAC80211(priv, "enter\n");
373 mutex_lock(&priv->mutex);
374
375 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
376 goto out;
377
378 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
379 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
380 priv->replay_ctr =
381 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
382 priv->have_rekey_data = true;
383
384 out:
385 mutex_unlock(&priv->mutex);
386 IWL_DEBUG_MAC80211(priv, "leave\n");
387 }
388
389 #ifdef CONFIG_PM_SLEEP
390
391 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
392 struct cfg80211_wowlan *wowlan)
393 {
394 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
395 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
396 int ret;
397
398 if (WARN_ON(!wowlan))
399 return -EINVAL;
400
401 IWL_DEBUG_MAC80211(priv, "enter\n");
402 mutex_lock(&priv->mutex);
403
404 /* Don't attempt WoWLAN when not associated, tear down instead. */
405 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
406 !iwl_is_associated_ctx(ctx)) {
407 ret = 1;
408 goto out;
409 }
410
411 ret = iwlagn_suspend(priv, wowlan);
412 if (ret)
413 goto error;
414
415 device_set_wakeup_enable(trans(priv)->dev, true);
416
417 iwl_trans_wowlan_suspend(trans(priv));
418
419 goto out;
420
421 error:
422 priv->wowlan = false;
423 iwlagn_prepare_restart(priv);
424 ieee80211_restart_hw(priv->hw);
425 out:
426 mutex_unlock(&priv->mutex);
427 IWL_DEBUG_MAC80211(priv, "leave\n");
428
429 return ret;
430 }
431
432 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
433 {
434 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
435 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
436 struct ieee80211_vif *vif;
437 unsigned long flags;
438 u32 base, status = 0xffffffff;
439 int ret = -EIO;
440
441 IWL_DEBUG_MAC80211(priv, "enter\n");
442 mutex_lock(&priv->mutex);
443
444 iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
445 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
446
447 base = priv->shrd->device_pointers.error_event_table;
448 if (iwlagn_hw_valid_rtc_data_addr(base)) {
449 spin_lock_irqsave(&trans(priv)->reg_lock, flags);
450 ret = iwl_grab_nic_access_silent(trans(priv));
451 if (likely(ret == 0)) {
452 iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, base);
453 status = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
454 iwl_release_nic_access(trans(priv));
455 }
456 spin_unlock_irqrestore(&trans(priv)->reg_lock, flags);
457
458 #ifdef CONFIG_IWLWIFI_DEBUGFS
459 if (ret == 0) {
460 if (!priv->wowlan_sram)
461 priv->wowlan_sram =
462 kzalloc(priv->fw->ucode_wowlan.data.len,
463 GFP_KERNEL);
464
465 if (priv->wowlan_sram)
466 _iwl_read_targ_mem_words(
467 trans(priv), 0x800000,
468 priv->wowlan_sram,
469 priv->fw->ucode_wowlan.data.len / 4);
470 }
471 #endif
472 }
473
474 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
475 vif = ctx->vif;
476
477 priv->wowlan = false;
478
479 device_set_wakeup_enable(trans(priv)->dev, false);
480
481 iwlagn_prepare_restart(priv);
482
483 memset((void *)&ctx->active, 0, sizeof(ctx->active));
484 iwl_connection_init_rx_config(priv, ctx);
485 iwlagn_set_rxon_chain(priv, ctx);
486
487 mutex_unlock(&priv->mutex);
488 IWL_DEBUG_MAC80211(priv, "leave\n");
489
490 ieee80211_resume_disconnect(vif);
491
492 return 1;
493 }
494
495 #endif
496
497 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
498 {
499 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
500
501 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
502 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
503
504 if (iwlagn_tx_skb(priv, skb))
505 dev_kfree_skb_any(skb);
506 }
507
508 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
509 struct ieee80211_vif *vif,
510 struct ieee80211_key_conf *keyconf,
511 struct ieee80211_sta *sta,
512 u32 iv32, u16 *phase1key)
513 {
514 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
515
516 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
517 }
518
519 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
520 struct ieee80211_vif *vif,
521 struct ieee80211_sta *sta,
522 struct ieee80211_key_conf *key)
523 {
524 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
525 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
526 struct iwl_rxon_context *ctx = vif_priv->ctx;
527 int ret;
528 bool is_default_wep_key = false;
529
530 IWL_DEBUG_MAC80211(priv, "enter\n");
531
532 if (iwlagn_mod_params.sw_crypto) {
533 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
534 return -EOPNOTSUPP;
535 }
536
537 switch (key->cipher) {
538 case WLAN_CIPHER_SUITE_TKIP:
539 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
540 /* fall through */
541 case WLAN_CIPHER_SUITE_CCMP:
542 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
543 break;
544 default:
545 break;
546 }
547
548 /*
549 * We could program these keys into the hardware as well, but we
550 * don't expect much multicast traffic in IBSS and having keys
551 * for more stations is probably more useful.
552 *
553 * Mark key TX-only and return 0.
554 */
555 if (vif->type == NL80211_IFTYPE_ADHOC &&
556 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
557 key->hw_key_idx = WEP_INVALID_OFFSET;
558 return 0;
559 }
560
561 /* If they key was TX-only, accept deletion */
562 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
563 return 0;
564
565 mutex_lock(&priv->mutex);
566 iwl_scan_cancel_timeout(priv, 100);
567
568 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
569
570 /*
571 * If we are getting WEP group key and we didn't receive any key mapping
572 * so far, we are in legacy wep mode (group key only), otherwise we are
573 * in 1X mode.
574 * In legacy wep mode, we use another host command to the uCode.
575 */
576 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
577 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
578 if (cmd == SET_KEY)
579 is_default_wep_key = !ctx->key_mapping_keys;
580 else
581 is_default_wep_key =
582 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
583 }
584
585
586 switch (cmd) {
587 case SET_KEY:
588 if (is_default_wep_key) {
589 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
590 break;
591 }
592 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
593 if (ret) {
594 /*
595 * can't add key for RX, but we don't need it
596 * in the device for TX so still return 0
597 */
598 ret = 0;
599 key->hw_key_idx = WEP_INVALID_OFFSET;
600 }
601
602 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
603 break;
604 case DISABLE_KEY:
605 if (is_default_wep_key)
606 ret = iwl_remove_default_wep_key(priv, ctx, key);
607 else
608 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
609
610 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
611 break;
612 default:
613 ret = -EINVAL;
614 }
615
616 mutex_unlock(&priv->mutex);
617 IWL_DEBUG_MAC80211(priv, "leave\n");
618
619 return ret;
620 }
621
622 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
623 struct ieee80211_vif *vif,
624 enum ieee80211_ampdu_mlme_action action,
625 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
626 u8 buf_size)
627 {
628 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
629 int ret = -EINVAL;
630 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
631
632 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
633 sta->addr, tid);
634
635 if (!(hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE))
636 return -EACCES;
637
638 IWL_DEBUG_MAC80211(priv, "enter\n");
639 mutex_lock(&priv->mutex);
640
641 switch (action) {
642 case IEEE80211_AMPDU_RX_START:
643 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
644 break;
645 IWL_DEBUG_HT(priv, "start Rx\n");
646 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
647 break;
648 case IEEE80211_AMPDU_RX_STOP:
649 IWL_DEBUG_HT(priv, "stop Rx\n");
650 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
651 break;
652 case IEEE80211_AMPDU_TX_START:
653 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
654 break;
655 IWL_DEBUG_HT(priv, "start Tx\n");
656 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
657 break;
658 case IEEE80211_AMPDU_TX_STOP:
659 IWL_DEBUG_HT(priv, "stop Tx\n");
660 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
661 if ((ret == 0) && (priv->agg_tids_count > 0)) {
662 priv->agg_tids_count--;
663 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
664 priv->agg_tids_count);
665 }
666 if (!priv->agg_tids_count &&
667 hw_params(priv).use_rts_for_aggregation) {
668 /*
669 * switch off RTS/CTS if it was previously enabled
670 */
671 sta_priv->lq_sta.lq.general_params.flags &=
672 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
673 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
674 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
675 }
676 break;
677 case IEEE80211_AMPDU_TX_OPERATIONAL:
678 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
679 break;
680 }
681 mutex_unlock(&priv->mutex);
682 IWL_DEBUG_MAC80211(priv, "leave\n");
683 return ret;
684 }
685
686 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
687 struct ieee80211_vif *vif,
688 struct ieee80211_sta *sta)
689 {
690 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
691 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
692 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
693 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
694 int ret;
695 u8 sta_id;
696
697 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
698 sta->addr);
699 sta_priv->sta_id = IWL_INVALID_STATION;
700
701 atomic_set(&sta_priv->pending_frames, 0);
702 if (vif->type == NL80211_IFTYPE_AP)
703 sta_priv->client = true;
704
705 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
706 is_ap, sta, &sta_id);
707 if (ret) {
708 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
709 sta->addr, ret);
710 /* Should we return success if return code is EEXIST ? */
711 return ret;
712 }
713
714 sta_priv->sta_id = sta_id;
715
716 return 0;
717 }
718
719 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
720 struct ieee80211_vif *vif,
721 struct ieee80211_sta *sta)
722 {
723 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
724 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
725 int ret;
726
727 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
728
729 if (vif->type == NL80211_IFTYPE_STATION) {
730 /*
731 * Station will be removed from device when the RXON
732 * is set to unassociated -- just deactivate it here
733 * to avoid re-programming it.
734 */
735 ret = 0;
736 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
737 } else {
738 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
739 if (ret)
740 IWL_DEBUG_QUIET_RFKILL(priv,
741 "Error removing station %pM\n", sta->addr);
742 }
743 return ret;
744 }
745
746 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
747 struct ieee80211_vif *vif,
748 struct ieee80211_sta *sta,
749 enum ieee80211_sta_state old_state,
750 enum ieee80211_sta_state new_state)
751 {
752 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
753 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
754 enum {
755 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
756 } op = NONE;
757 int ret;
758
759 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
760 sta->addr, old_state, new_state);
761
762 mutex_lock(&priv->mutex);
763 if (vif->type == NL80211_IFTYPE_STATION) {
764 if (old_state == IEEE80211_STA_NOTEXIST &&
765 new_state == IEEE80211_STA_NONE)
766 op = ADD;
767 else if (old_state == IEEE80211_STA_NONE &&
768 new_state == IEEE80211_STA_NOTEXIST)
769 op = REMOVE;
770 else if (old_state == IEEE80211_STA_AUTH &&
771 new_state == IEEE80211_STA_ASSOC)
772 op = HT_RATE_INIT;
773 } else {
774 if (old_state == IEEE80211_STA_AUTH &&
775 new_state == IEEE80211_STA_ASSOC)
776 op = ADD_RATE_INIT;
777 else if (old_state == IEEE80211_STA_ASSOC &&
778 new_state == IEEE80211_STA_AUTH)
779 op = REMOVE;
780 }
781
782 switch (op) {
783 case ADD:
784 ret = iwlagn_mac_sta_add(hw, vif, sta);
785 break;
786 case REMOVE:
787 ret = iwlagn_mac_sta_remove(hw, vif, sta);
788 break;
789 case ADD_RATE_INIT:
790 ret = iwlagn_mac_sta_add(hw, vif, sta);
791 if (ret)
792 break;
793 /* Initialize rate scaling */
794 IWL_DEBUG_INFO(priv,
795 "Initializing rate scaling for station %pM\n",
796 sta->addr);
797 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
798 ret = 0;
799 break;
800 case HT_RATE_INIT:
801 /* Initialize rate scaling */
802 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
803 if (ret)
804 break;
805 IWL_DEBUG_INFO(priv,
806 "Initializing rate scaling for station %pM\n",
807 sta->addr);
808 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
809 ret = 0;
810 break;
811 default:
812 ret = 0;
813 break;
814 }
815
816 /*
817 * mac80211 might WARN if we fail, but due the way we
818 * (badly) handle hard rfkill, we might fail here
819 */
820 if (iwl_is_rfkill(priv))
821 ret = 0;
822
823 mutex_unlock(&priv->mutex);
824 IWL_DEBUG_MAC80211(priv, "leave\n");
825
826 return ret;
827 }
828
829 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
830 struct ieee80211_channel_switch *ch_switch)
831 {
832 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
833 const struct iwl_channel_info *ch_info;
834 struct ieee80211_conf *conf = &hw->conf;
835 struct ieee80211_channel *channel = ch_switch->channel;
836 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
837 /*
838 * MULTI-FIXME
839 * When we add support for multiple interfaces, we need to
840 * revisit this. The channel switch command in the device
841 * only affects the BSS context, but what does that really
842 * mean? And what if we get a CSA on the second interface?
843 * This needs a lot of work.
844 */
845 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
846 u16 ch;
847
848 IWL_DEBUG_MAC80211(priv, "enter\n");
849
850 mutex_lock(&priv->mutex);
851
852 if (iwl_is_rfkill(priv))
853 goto out;
854
855 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
856 test_bit(STATUS_SCANNING, &priv->status) ||
857 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
858 goto out;
859
860 if (!iwl_is_associated_ctx(ctx))
861 goto out;
862
863 if (!cfg(priv)->lib->set_channel_switch)
864 goto out;
865
866 ch = channel->hw_value;
867 if (le16_to_cpu(ctx->active.channel) == ch)
868 goto out;
869
870 ch_info = iwl_get_channel_info(priv, channel->band, ch);
871 if (!is_channel_valid(ch_info)) {
872 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
873 goto out;
874 }
875
876 priv->current_ht_config.smps = conf->smps_mode;
877
878 /* Configure HT40 channels */
879 ctx->ht.enabled = conf_is_ht(conf);
880 if (ctx->ht.enabled)
881 iwlagn_config_ht40(conf, ctx);
882 else
883 ctx->ht.is_40mhz = false;
884
885 if ((le16_to_cpu(ctx->staging.channel) != ch))
886 ctx->staging.flags = 0;
887
888 iwl_set_rxon_channel(priv, channel, ctx);
889 iwl_set_rxon_ht(priv, ht_conf);
890 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
891
892 iwl_set_rate(priv);
893 /*
894 * at this point, staging_rxon has the
895 * configuration for channel switch
896 */
897 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
898 priv->switch_channel = cpu_to_le16(ch);
899 if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
900 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
901 priv->switch_channel = 0;
902 ieee80211_chswitch_done(ctx->vif, false);
903 }
904
905 out:
906 mutex_unlock(&priv->mutex);
907 IWL_DEBUG_MAC80211(priv, "leave\n");
908 }
909
910 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
911 unsigned int changed_flags,
912 unsigned int *total_flags,
913 u64 multicast)
914 {
915 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
916 __le32 filter_or = 0, filter_nand = 0;
917 struct iwl_rxon_context *ctx;
918
919 #define CHK(test, flag) do { \
920 if (*total_flags & (test)) \
921 filter_or |= (flag); \
922 else \
923 filter_nand |= (flag); \
924 } while (0)
925
926 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
927 changed_flags, *total_flags);
928
929 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
930 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
931 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
932 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
933
934 #undef CHK
935
936 mutex_lock(&priv->mutex);
937
938 for_each_context(priv, ctx) {
939 ctx->staging.filter_flags &= ~filter_nand;
940 ctx->staging.filter_flags |= filter_or;
941
942 /*
943 * Not committing directly because hardware can perform a scan,
944 * but we'll eventually commit the filter flags change anyway.
945 */
946 }
947
948 mutex_unlock(&priv->mutex);
949
950 /*
951 * Receiving all multicast frames is always enabled by the
952 * default flags setup in iwl_connection_init_rx_config()
953 * since we currently do not support programming multicast
954 * filters into the device.
955 */
956 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
957 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
958 }
959
960 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
961 {
962 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
963
964 mutex_lock(&priv->mutex);
965 IWL_DEBUG_MAC80211(priv, "enter\n");
966
967 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
968 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
969 goto done;
970 }
971 if (iwl_is_rfkill(priv)) {
972 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
973 goto done;
974 }
975
976 /*
977 * mac80211 will not push any more frames for transmit
978 * until the flush is completed
979 */
980 if (drop) {
981 IWL_DEBUG_MAC80211(priv, "send flush command\n");
982 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
983 IWL_ERR(priv, "flush request fail\n");
984 goto done;
985 }
986 }
987 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
988 iwl_trans_wait_tx_queue_empty(trans(priv));
989 done:
990 mutex_unlock(&priv->mutex);
991 IWL_DEBUG_MAC80211(priv, "leave\n");
992 }
993
994 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
995 struct ieee80211_channel *channel,
996 enum nl80211_channel_type channel_type,
997 int duration)
998 {
999 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1000 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1001 int err = 0;
1002
1003 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1004 return -EOPNOTSUPP;
1005
1006 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1007 return -EOPNOTSUPP;
1008
1009 IWL_DEBUG_MAC80211(priv, "enter\n");
1010 mutex_lock(&priv->mutex);
1011
1012 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1013 err = -EBUSY;
1014 goto out;
1015 }
1016
1017 priv->hw_roc_channel = channel;
1018 priv->hw_roc_chantype = channel_type;
1019 /* convert from ms to TU */
1020 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1021 priv->hw_roc_start_notified = false;
1022 cancel_delayed_work(&priv->hw_roc_disable_work);
1023
1024 if (!ctx->is_active) {
1025 static const struct iwl_qos_info default_qos_data = {
1026 .def_qos_parm = {
1027 .ac[0] = {
1028 .cw_min = cpu_to_le16(3),
1029 .cw_max = cpu_to_le16(7),
1030 .aifsn = 2,
1031 .edca_txop = cpu_to_le16(1504),
1032 },
1033 .ac[1] = {
1034 .cw_min = cpu_to_le16(7),
1035 .cw_max = cpu_to_le16(15),
1036 .aifsn = 2,
1037 .edca_txop = cpu_to_le16(3008),
1038 },
1039 .ac[2] = {
1040 .cw_min = cpu_to_le16(15),
1041 .cw_max = cpu_to_le16(1023),
1042 .aifsn = 3,
1043 },
1044 .ac[3] = {
1045 .cw_min = cpu_to_le16(15),
1046 .cw_max = cpu_to_le16(1023),
1047 .aifsn = 7,
1048 },
1049 },
1050 };
1051
1052 ctx->is_active = true;
1053 ctx->qos_data = default_qos_data;
1054 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1055 memcpy(ctx->staging.node_addr,
1056 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1057 ETH_ALEN);
1058 memcpy(ctx->staging.bssid_addr,
1059 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1060 ETH_ALEN);
1061 err = iwlagn_commit_rxon(priv, ctx);
1062 if (err)
1063 goto out;
1064 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1065 RXON_FILTER_PROMISC_MSK |
1066 RXON_FILTER_CTL2HOST_MSK;
1067
1068 err = iwlagn_commit_rxon(priv, ctx);
1069 if (err) {
1070 iwlagn_disable_roc(priv);
1071 goto out;
1072 }
1073 priv->hw_roc_setup = true;
1074 }
1075
1076 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1077 if (err)
1078 iwlagn_disable_roc(priv);
1079
1080 out:
1081 mutex_unlock(&priv->mutex);
1082 IWL_DEBUG_MAC80211(priv, "leave\n");
1083
1084 return err;
1085 }
1086
1087 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1088 {
1089 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1090
1091 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1092 return -EOPNOTSUPP;
1093
1094 IWL_DEBUG_MAC80211(priv, "enter\n");
1095 mutex_lock(&priv->mutex);
1096 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1097 iwlagn_disable_roc(priv);
1098 mutex_unlock(&priv->mutex);
1099 IWL_DEBUG_MAC80211(priv, "leave\n");
1100
1101 return 0;
1102 }
1103
1104 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1105 enum ieee80211_rssi_event rssi_event)
1106 {
1107 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1108
1109 IWL_DEBUG_MAC80211(priv, "enter\n");
1110 mutex_lock(&priv->mutex);
1111
1112 if (cfg(priv)->bt_params &&
1113 cfg(priv)->bt_params->advanced_bt_coexist) {
1114 if (rssi_event == RSSI_EVENT_LOW)
1115 priv->bt_enable_pspoll = true;
1116 else if (rssi_event == RSSI_EVENT_HIGH)
1117 priv->bt_enable_pspoll = false;
1118
1119 iwlagn_send_advance_bt_config(priv);
1120 } else {
1121 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1122 "ignoring RSSI callback\n");
1123 }
1124
1125 mutex_unlock(&priv->mutex);
1126 IWL_DEBUG_MAC80211(priv, "leave\n");
1127 }
1128
1129 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1130 struct ieee80211_sta *sta, bool set)
1131 {
1132 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1133
1134 queue_work(priv->workqueue, &priv->beacon_update);
1135
1136 return 0;
1137 }
1138
1139 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1140 struct ieee80211_vif *vif, u16 queue,
1141 const struct ieee80211_tx_queue_params *params)
1142 {
1143 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1144 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1145 struct iwl_rxon_context *ctx = vif_priv->ctx;
1146 int q;
1147
1148 if (WARN_ON(!ctx))
1149 return -EINVAL;
1150
1151 IWL_DEBUG_MAC80211(priv, "enter\n");
1152
1153 if (!iwl_is_ready_rf(priv)) {
1154 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1155 return -EIO;
1156 }
1157
1158 if (queue >= AC_NUM) {
1159 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1160 return 0;
1161 }
1162
1163 q = AC_NUM - 1 - queue;
1164
1165 mutex_lock(&priv->mutex);
1166
1167 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1168 cpu_to_le16(params->cw_min);
1169 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1170 cpu_to_le16(params->cw_max);
1171 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1172 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1173 cpu_to_le16((params->txop * 32));
1174
1175 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1176
1177 mutex_unlock(&priv->mutex);
1178
1179 IWL_DEBUG_MAC80211(priv, "leave\n");
1180 return 0;
1181 }
1182
1183 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1184 {
1185 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1186
1187 return priv->ibss_manager == IWL_IBSS_MANAGER;
1188 }
1189
1190 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1191 {
1192 iwl_connection_init_rx_config(priv, ctx);
1193
1194 iwlagn_set_rxon_chain(priv, ctx);
1195
1196 return iwlagn_commit_rxon(priv, ctx);
1197 }
1198
1199 static int iwl_setup_interface(struct iwl_priv *priv,
1200 struct iwl_rxon_context *ctx)
1201 {
1202 struct ieee80211_vif *vif = ctx->vif;
1203 int err;
1204
1205 lockdep_assert_held(&priv->mutex);
1206
1207 /*
1208 * This variable will be correct only when there's just
1209 * a single context, but all code using it is for hardware
1210 * that supports only one context.
1211 */
1212 priv->iw_mode = vif->type;
1213
1214 ctx->is_active = true;
1215
1216 err = iwl_set_mode(priv, ctx);
1217 if (err) {
1218 if (!ctx->always_active)
1219 ctx->is_active = false;
1220 return err;
1221 }
1222
1223 if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1224 vif->type == NL80211_IFTYPE_ADHOC) {
1225 /*
1226 * pretend to have high BT traffic as long as we
1227 * are operating in IBSS mode, as this will cause
1228 * the rate scaling etc. to behave as intended.
1229 */
1230 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1231 }
1232
1233 return 0;
1234 }
1235
1236 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1237 struct ieee80211_vif *vif)
1238 {
1239 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1240 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1241 struct iwl_rxon_context *tmp, *ctx = NULL;
1242 int err;
1243 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1244
1245 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1246 viftype, vif->addr);
1247
1248 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1249
1250 mutex_lock(&priv->mutex);
1251
1252 iwlagn_disable_roc(priv);
1253
1254 if (!iwl_is_ready_rf(priv)) {
1255 IWL_WARN(priv, "Try to add interface when device not ready\n");
1256 err = -EINVAL;
1257 goto out;
1258 }
1259
1260 for_each_context(priv, tmp) {
1261 u32 possible_modes =
1262 tmp->interface_modes | tmp->exclusive_interface_modes;
1263
1264 if (tmp->vif) {
1265 /* check if this busy context is exclusive */
1266 if (tmp->exclusive_interface_modes &
1267 BIT(tmp->vif->type)) {
1268 err = -EINVAL;
1269 goto out;
1270 }
1271 continue;
1272 }
1273
1274 if (!(possible_modes & BIT(viftype)))
1275 continue;
1276
1277 /* have maybe usable context w/o interface */
1278 ctx = tmp;
1279 break;
1280 }
1281
1282 if (!ctx) {
1283 err = -EOPNOTSUPP;
1284 goto out;
1285 }
1286
1287 vif_priv->ctx = ctx;
1288 ctx->vif = vif;
1289
1290 err = iwl_setup_interface(priv, ctx);
1291 if (!err)
1292 goto out;
1293
1294 ctx->vif = NULL;
1295 priv->iw_mode = NL80211_IFTYPE_STATION;
1296 out:
1297 mutex_unlock(&priv->mutex);
1298
1299 IWL_DEBUG_MAC80211(priv, "leave\n");
1300 return err;
1301 }
1302
1303 static void iwl_teardown_interface(struct iwl_priv *priv,
1304 struct ieee80211_vif *vif,
1305 bool mode_change)
1306 {
1307 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1308
1309 lockdep_assert_held(&priv->mutex);
1310
1311 if (priv->scan_vif == vif) {
1312 iwl_scan_cancel_timeout(priv, 200);
1313 iwl_force_scan_end(priv);
1314 }
1315
1316 if (!mode_change) {
1317 iwl_set_mode(priv, ctx);
1318 if (!ctx->always_active)
1319 ctx->is_active = false;
1320 }
1321
1322 /*
1323 * When removing the IBSS interface, overwrite the
1324 * BT traffic load with the stored one from the last
1325 * notification, if any. If this is a device that
1326 * doesn't implement this, this has no effect since
1327 * both values are the same and zero.
1328 */
1329 if (vif->type == NL80211_IFTYPE_ADHOC)
1330 priv->bt_traffic_load = priv->last_bt_traffic_load;
1331 }
1332
1333 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1334 struct ieee80211_vif *vif)
1335 {
1336 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1337 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1338
1339 IWL_DEBUG_MAC80211(priv, "enter\n");
1340
1341 mutex_lock(&priv->mutex);
1342
1343 if (WARN_ON(ctx->vif != vif)) {
1344 struct iwl_rxon_context *tmp;
1345 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1346 for_each_context(priv, tmp)
1347 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1348 tmp->ctxid, tmp, tmp->vif);
1349 }
1350 ctx->vif = NULL;
1351
1352 iwl_teardown_interface(priv, vif, false);
1353
1354 mutex_unlock(&priv->mutex);
1355
1356 IWL_DEBUG_MAC80211(priv, "leave\n");
1357
1358 }
1359
1360 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1361 struct ieee80211_vif *vif,
1362 enum nl80211_iftype newtype, bool newp2p)
1363 {
1364 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1365 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1366 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1367 struct iwl_rxon_context *tmp;
1368 enum nl80211_iftype newviftype = newtype;
1369 u32 interface_modes;
1370 int err;
1371
1372 IWL_DEBUG_MAC80211(priv, "enter\n");
1373
1374 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1375
1376 mutex_lock(&priv->mutex);
1377
1378 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1379 /*
1380 * Huh? But wait ... this can maybe happen when
1381 * we're in the middle of a firmware restart!
1382 */
1383 err = -EBUSY;
1384 goto out;
1385 }
1386
1387 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1388
1389 if (!(interface_modes & BIT(newtype))) {
1390 err = -EBUSY;
1391 goto out;
1392 }
1393
1394 /*
1395 * Refuse a change that should be done by moving from the PAN
1396 * context to the BSS context instead, if the BSS context is
1397 * available and can support the new interface type.
1398 */
1399 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1400 (bss_ctx->interface_modes & BIT(newtype) ||
1401 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1402 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1403 err = -EBUSY;
1404 goto out;
1405 }
1406
1407 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1408 for_each_context(priv, tmp) {
1409 if (ctx == tmp)
1410 continue;
1411
1412 if (!tmp->vif)
1413 continue;
1414
1415 /*
1416 * The current mode switch would be exclusive, but
1417 * another context is active ... refuse the switch.
1418 */
1419 err = -EBUSY;
1420 goto out;
1421 }
1422 }
1423
1424 /* success */
1425 iwl_teardown_interface(priv, vif, true);
1426 vif->type = newviftype;
1427 vif->p2p = newp2p;
1428 err = iwl_setup_interface(priv, ctx);
1429 WARN_ON(err);
1430 /*
1431 * We've switched internally, but submitting to the
1432 * device may have failed for some reason. Mask this
1433 * error, because otherwise mac80211 will not switch
1434 * (and set the interface type back) and we'll be
1435 * out of sync with it.
1436 */
1437 err = 0;
1438
1439 out:
1440 mutex_unlock(&priv->mutex);
1441 IWL_DEBUG_MAC80211(priv, "leave\n");
1442
1443 return err;
1444 }
1445
1446 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1447 struct ieee80211_vif *vif,
1448 struct cfg80211_scan_request *req)
1449 {
1450 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1451 int ret;
1452
1453 IWL_DEBUG_MAC80211(priv, "enter\n");
1454
1455 if (req->n_channels == 0)
1456 return -EINVAL;
1457
1458 mutex_lock(&priv->mutex);
1459
1460 /*
1461 * If an internal scan is in progress, just set
1462 * up the scan_request as per above.
1463 */
1464 if (priv->scan_type != IWL_SCAN_NORMAL) {
1465 IWL_DEBUG_SCAN(priv,
1466 "SCAN request during internal scan - defer\n");
1467 priv->scan_request = req;
1468 priv->scan_vif = vif;
1469 ret = 0;
1470 } else {
1471 priv->scan_request = req;
1472 priv->scan_vif = vif;
1473 /*
1474 * mac80211 will only ask for one band at a time
1475 * so using channels[0] here is ok
1476 */
1477 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1478 req->channels[0]->band);
1479 if (ret) {
1480 priv->scan_request = NULL;
1481 priv->scan_vif = NULL;
1482 }
1483 }
1484
1485 IWL_DEBUG_MAC80211(priv, "leave\n");
1486
1487 mutex_unlock(&priv->mutex);
1488
1489 return ret;
1490 }
1491
1492 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1493 {
1494 struct iwl_addsta_cmd cmd = {
1495 .mode = STA_CONTROL_MODIFY_MSK,
1496 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1497 .sta.sta_id = sta_id,
1498 };
1499
1500 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1501 }
1502
1503 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1504 struct ieee80211_vif *vif,
1505 enum sta_notify_cmd cmd,
1506 struct ieee80211_sta *sta)
1507 {
1508 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1509 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1510 int sta_id;
1511
1512 IWL_DEBUG_MAC80211(priv, "enter\n");
1513
1514 switch (cmd) {
1515 case STA_NOTIFY_SLEEP:
1516 WARN_ON(!sta_priv->client);
1517 sta_priv->asleep = true;
1518 if (atomic_read(&sta_priv->pending_frames) > 0)
1519 ieee80211_sta_block_awake(hw, sta, true);
1520 break;
1521 case STA_NOTIFY_AWAKE:
1522 WARN_ON(!sta_priv->client);
1523 if (!sta_priv->asleep)
1524 break;
1525 sta_priv->asleep = false;
1526 sta_id = iwl_sta_id(sta);
1527 if (sta_id != IWL_INVALID_STATION)
1528 iwl_sta_modify_ps_wake(priv, sta_id);
1529 break;
1530 default:
1531 break;
1532 }
1533 IWL_DEBUG_MAC80211(priv, "leave\n");
1534 }
1535
1536 struct ieee80211_ops iwlagn_hw_ops = {
1537 .tx = iwlagn_mac_tx,
1538 .start = iwlagn_mac_start,
1539 .stop = iwlagn_mac_stop,
1540 #ifdef CONFIG_PM_SLEEP
1541 .suspend = iwlagn_mac_suspend,
1542 .resume = iwlagn_mac_resume,
1543 #endif
1544 .add_interface = iwlagn_mac_add_interface,
1545 .remove_interface = iwlagn_mac_remove_interface,
1546 .change_interface = iwlagn_mac_change_interface,
1547 .config = iwlagn_mac_config,
1548 .configure_filter = iwlagn_configure_filter,
1549 .set_key = iwlagn_mac_set_key,
1550 .update_tkip_key = iwlagn_mac_update_tkip_key,
1551 .set_rekey_data = iwlagn_mac_set_rekey_data,
1552 .conf_tx = iwlagn_mac_conf_tx,
1553 .bss_info_changed = iwlagn_bss_info_changed,
1554 .ampdu_action = iwlagn_mac_ampdu_action,
1555 .hw_scan = iwlagn_mac_hw_scan,
1556 .sta_notify = iwlagn_mac_sta_notify,
1557 .sta_state = iwlagn_mac_sta_state,
1558 .channel_switch = iwlagn_mac_channel_switch,
1559 .flush = iwlagn_mac_flush,
1560 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1561 .remain_on_channel = iwlagn_mac_remain_on_channel,
1562 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1563 .rssi_callback = iwlagn_mac_rssi_callback,
1564 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1565 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1566 .set_tim = iwlagn_mac_set_tim,
1567 };
1568
1569 /* This function both allocates and initializes hw and priv. */
1570 struct ieee80211_hw *iwl_alloc_all(void)
1571 {
1572 struct iwl_priv *priv;
1573 struct iwl_op_mode *op_mode;
1574 /* mac80211 allocates memory for this device instance, including
1575 * space for this driver's private structure */
1576 struct ieee80211_hw *hw;
1577
1578 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1579 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1580 if (!hw)
1581 goto out;
1582
1583 op_mode = hw->priv;
1584 priv = IWL_OP_MODE_GET_DVM(op_mode);
1585 priv->hw = hw;
1586
1587 out:
1588 return hw;
1589 }
Linux kernel - Deliverables
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