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