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iwlwifi: move wowlan bool into priv
[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-ucode.h"
46 #include "iwl-eeprom.h"
47 #include "iwl-wifi.h"
48 #include "iwl-dev.h"
49 #include "iwl-core.h"
50 #include "iwl-io.h"
51 #include "iwl-agn-calib.h"
52 #include "iwl-agn.h"
53 #include "iwl-shared.h"
54 #include "iwl-trans.h"
55 #include "iwl-op-mode.h"
56
57 /*****************************************************************************
58 *
59 * mac80211 entry point functions
60 *
61 *****************************************************************************/
62
63 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
64 {
65 .max = 1,
66 .types = BIT(NL80211_IFTYPE_STATION),
67 },
68 {
69 .max = 1,
70 .types = BIT(NL80211_IFTYPE_AP),
71 },
72 };
73
74 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
75 {
76 .max = 2,
77 .types = BIT(NL80211_IFTYPE_STATION),
78 },
79 };
80
81 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
82 {
83 .max = 1,
84 .types = BIT(NL80211_IFTYPE_STATION),
85 },
86 {
87 .max = 1,
88 .types = BIT(NL80211_IFTYPE_P2P_GO) |
89 BIT(NL80211_IFTYPE_AP),
90 },
91 };
92
93 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
94 {
95 .max = 2,
96 .types = BIT(NL80211_IFTYPE_STATION),
97 },
98 {
99 .max = 1,
100 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
101 },
102 };
103
104 static const struct ieee80211_iface_combination
105 iwlagn_iface_combinations_dualmode[] = {
106 { .num_different_channels = 1,
107 .max_interfaces = 2,
108 .beacon_int_infra_match = true,
109 .limits = iwlagn_sta_ap_limits,
110 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
111 },
112 { .num_different_channels = 1,
113 .max_interfaces = 2,
114 .limits = iwlagn_2sta_limits,
115 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
116 },
117 };
118
119 static const struct ieee80211_iface_combination
120 iwlagn_iface_combinations_p2p[] = {
121 { .num_different_channels = 1,
122 .max_interfaces = 2,
123 .beacon_int_infra_match = true,
124 .limits = iwlagn_p2p_sta_go_limits,
125 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
126 },
127 { .num_different_channels = 1,
128 .max_interfaces = 2,
129 .limits = iwlagn_p2p_2sta_limits,
130 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
131 },
132 };
133
134 /*
135 * Not a mac80211 entry point function, but it fits in with all the
136 * other mac80211 functions grouped here.
137 */
138 int iwlagn_mac_setup_register(struct iwl_priv *priv,
139 struct iwl_ucode_capabilities *capa)
140 {
141 int ret;
142 struct ieee80211_hw *hw = priv->hw;
143 struct iwl_rxon_context *ctx;
144
145 hw->rate_control_algorithm = "iwl-agn-rs";
146
147 /* Tell mac80211 our characteristics */
148 hw->flags = IEEE80211_HW_SIGNAL_DBM |
149 IEEE80211_HW_AMPDU_AGGREGATION |
150 IEEE80211_HW_NEED_DTIM_PERIOD |
151 IEEE80211_HW_SPECTRUM_MGMT |
152 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
153
154 /*
155 * Including the following line will crash some AP's. This
156 * workaround removes the stimulus which causes the crash until
157 * the AP software can be fixed.
158 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
159 */
160
161 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
162 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
163
164 if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
165 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
166 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
167
168 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
169 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
170
171 hw->sta_data_size = sizeof(struct iwl_station_priv);
172 hw->vif_data_size = sizeof(struct iwl_vif_priv);
173
174 for_each_context(priv, ctx) {
175 hw->wiphy->interface_modes |= ctx->interface_modes;
176 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
177 }
178
179 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
180
181 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
182 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
183 hw->wiphy->n_iface_combinations =
184 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
185 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
186 hw->wiphy->iface_combinations =
187 iwlagn_iface_combinations_dualmode;
188 hw->wiphy->n_iface_combinations =
189 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
190 }
191
192 hw->wiphy->max_remain_on_channel_duration = 1000;
193
194 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
195 WIPHY_FLAG_DISABLE_BEACON_HINTS |
196 WIPHY_FLAG_IBSS_RSN;
197
198 if (nic(priv)->fw.ucode_wowlan.code.len &&
199 trans(priv)->ops->wowlan_suspend &&
200 device_can_wakeup(trans(priv)->dev)) {
201 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
202 WIPHY_WOWLAN_DISCONNECT |
203 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
204 WIPHY_WOWLAN_RFKILL_RELEASE;
205 if (!iwlagn_mod_params.sw_crypto)
206 hw->wiphy->wowlan.flags |=
207 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
208 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
209
210 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
211 hw->wiphy->wowlan.pattern_min_len =
212 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
213 hw->wiphy->wowlan.pattern_max_len =
214 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
215 }
216
217 if (iwlagn_mod_params.power_save)
218 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
219 else
220 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
221
222 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
223 /* we create the 802.11 header and a zero-length SSID element */
224 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
225
226 /* Default value; 4 EDCA QOS priorities */
227 hw->queues = 4;
228
229 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
230
231 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
232 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
233 &priv->bands[IEEE80211_BAND_2GHZ];
234 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
235 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
236 &priv->bands[IEEE80211_BAND_5GHZ];
237
238 hw->wiphy->hw_version = trans(priv)->hw_id;
239
240 iwl_leds_init(priv);
241
242 ret = ieee80211_register_hw(priv->hw);
243 if (ret) {
244 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
245 return ret;
246 }
247 priv->mac80211_registered = 1;
248
249 return 0;
250 }
251
252 void iwlagn_mac_unregister(struct iwl_priv *priv)
253 {
254 if (!priv->mac80211_registered)
255 return;
256 iwl_leds_exit(priv);
257 ieee80211_unregister_hw(priv->hw);
258 priv->mac80211_registered = 0;
259 }
260
261 static int __iwl_up(struct iwl_priv *priv)
262 {
263 struct iwl_rxon_context *ctx;
264 int ret;
265
266 lockdep_assert_held(&priv->shrd->mutex);
267
268 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
269 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
270 return -EIO;
271 }
272
273 for_each_context(priv, ctx) {
274 ret = iwlagn_alloc_bcast_station(priv, ctx);
275 if (ret) {
276 iwl_dealloc_bcast_stations(priv);
277 return ret;
278 }
279 }
280
281 ret = iwl_run_init_ucode(trans(priv));
282 if (ret) {
283 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
284 goto error;
285 }
286
287 ret = iwl_load_ucode_wait_alive(trans(priv), IWL_UCODE_REGULAR);
288 if (ret) {
289 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
290 goto error;
291 }
292
293 ret = iwl_alive_start(priv);
294 if (ret)
295 goto error;
296 return 0;
297
298 error:
299 set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
300 iwl_down(priv);
301 clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
302
303 IWL_ERR(priv, "Unable to initialize device.\n");
304 return ret;
305 }
306
307 static int iwlagn_mac_start(struct ieee80211_hw *hw)
308 {
309 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
310 int ret;
311
312 IWL_DEBUG_MAC80211(priv, "enter\n");
313
314 /* we should be verifying the device is ready to be opened */
315 mutex_lock(&priv->shrd->mutex);
316 ret = __iwl_up(priv);
317 mutex_unlock(&priv->shrd->mutex);
318 if (ret)
319 return ret;
320
321 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
322
323 /* Now we should be done, and the READY bit should be set. */
324 if (WARN_ON(!test_bit(STATUS_READY, &priv->shrd->status)))
325 ret = -EIO;
326
327 iwlagn_led_enable(priv);
328
329 priv->is_open = 1;
330 IWL_DEBUG_MAC80211(priv, "leave\n");
331 return 0;
332 }
333
334 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
335 {
336 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
337
338 IWL_DEBUG_MAC80211(priv, "enter\n");
339
340 if (!priv->is_open)
341 return;
342
343 priv->is_open = 0;
344
345 mutex_lock(&priv->shrd->mutex);
346 iwl_down(priv);
347 mutex_unlock(&priv->shrd->mutex);
348
349 iwl_cancel_deferred_work(priv);
350
351 flush_workqueue(priv->workqueue);
352
353 /* User space software may expect getting rfkill changes
354 * even if interface is down, trans->down will leave the RF
355 * kill interrupt enabled
356 */
357 iwl_trans_stop_hw(trans(priv));
358
359 IWL_DEBUG_MAC80211(priv, "leave\n");
360 }
361
362 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
363 struct ieee80211_vif *vif,
364 struct cfg80211_gtk_rekey_data *data)
365 {
366 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
367
368 if (iwlagn_mod_params.sw_crypto)
369 return;
370
371 IWL_DEBUG_MAC80211(priv, "enter\n");
372 mutex_lock(&priv->shrd->mutex);
373
374 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
375 goto out;
376
377 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
378 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
379 priv->replay_ctr =
380 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
381 priv->have_rekey_data = true;
382
383 out:
384 mutex_unlock(&priv->shrd->mutex);
385 IWL_DEBUG_MAC80211(priv, "leave\n");
386 }
387
388 #ifdef CONFIG_PM_SLEEP
389
390 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
391 struct cfg80211_wowlan *wowlan)
392 {
393 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
394 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
395 int ret;
396
397 if (WARN_ON(!wowlan))
398 return -EINVAL;
399
400 IWL_DEBUG_MAC80211(priv, "enter\n");
401 mutex_lock(&priv->shrd->mutex);
402
403 /* Don't attempt WoWLAN when not associated, tear down instead. */
404 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
405 !iwl_is_associated_ctx(ctx)) {
406 ret = 1;
407 goto out;
408 }
409
410 ret = iwlagn_suspend(priv, hw, wowlan);
411 if (ret)
412 goto error;
413
414 device_set_wakeup_enable(trans(priv)->dev, true);
415
416 iwl_trans_wowlan_suspend(trans(priv));
417
418 goto out;
419
420 error:
421 priv->wowlan = false;
422 iwlagn_prepare_restart(priv);
423 ieee80211_restart_hw(priv->hw);
424 out:
425 mutex_unlock(&priv->shrd->mutex);
426 IWL_DEBUG_MAC80211(priv, "leave\n");
427
428 return ret;
429 }
430
431 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
432 {
433 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
434 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
435 struct ieee80211_vif *vif;
436 unsigned long flags;
437 u32 base, status = 0xffffffff;
438 int ret = -EIO;
439
440 IWL_DEBUG_MAC80211(priv, "enter\n");
441 mutex_lock(&priv->shrd->mutex);
442
443 iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
444 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
445
446 base = priv->shrd->device_pointers.error_event_table;
447 if (iwlagn_hw_valid_rtc_data_addr(base)) {
448 spin_lock_irqsave(&trans(priv)->reg_lock, flags);
449 ret = iwl_grab_nic_access_silent(trans(priv));
450 if (ret == 0) {
451 iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, base);
452 status = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
453 iwl_release_nic_access(trans(priv));
454 }
455 spin_unlock_irqrestore(&trans(priv)->reg_lock, flags);
456
457 #ifdef CONFIG_IWLWIFI_DEBUGFS
458 if (ret == 0) {
459 struct iwl_nic *nic = nic(priv);
460 if (!priv->wowlan_sram)
461 priv->wowlan_sram =
462 kzalloc(nic->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 nic->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->shrd->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->shrd->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->shrd->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->shrd->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 && cfg(priv)->ht_params &&
667 cfg(priv)->ht_params->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->shrd->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",
728 sta->addr);
729 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
730 if (ret)
731 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
732 sta->addr);
733 return ret;
734 }
735
736 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
737 struct ieee80211_vif *vif,
738 struct ieee80211_sta *sta,
739 enum ieee80211_sta_state old_state,
740 enum ieee80211_sta_state new_state)
741 {
742 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
743 enum {
744 NONE, ADD, REMOVE, RATE_INIT, ADD_RATE_INIT,
745 } op = NONE;
746 int ret;
747
748 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
749 sta->addr, old_state, new_state);
750
751 mutex_lock(&priv->shrd->mutex);
752 if (vif->type == NL80211_IFTYPE_STATION) {
753 if (old_state == IEEE80211_STA_NOTEXIST &&
754 new_state == IEEE80211_STA_NONE)
755 op = ADD;
756 else if (old_state == IEEE80211_STA_NONE &&
757 new_state == IEEE80211_STA_NOTEXIST)
758 op = REMOVE;
759 else if (old_state == IEEE80211_STA_AUTH &&
760 new_state == IEEE80211_STA_ASSOC)
761 op = RATE_INIT;
762 } else {
763 if (old_state == IEEE80211_STA_AUTH &&
764 new_state == IEEE80211_STA_ASSOC)
765 op = ADD_RATE_INIT;
766 else if (old_state == IEEE80211_STA_ASSOC &&
767 new_state == IEEE80211_STA_AUTH)
768 op = REMOVE;
769 }
770
771 switch (op) {
772 case ADD:
773 ret = iwlagn_mac_sta_add(hw, vif, sta);
774 break;
775 case REMOVE:
776 ret = iwlagn_mac_sta_remove(hw, vif, sta);
777 break;
778 case ADD_RATE_INIT:
779 ret = iwlagn_mac_sta_add(hw, vif, sta);
780 if (ret)
781 break;
782 /* fall through */
783 case RATE_INIT:
784 /* Initialize rate scaling */
785 IWL_DEBUG_INFO(priv,
786 "Initializing rate scaling for station %pM\n",
787 sta->addr);
788 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
789 ret = 0;
790 break;
791 default:
792 ret = 0;
793 break;
794 }
795
796 /*
797 * mac80211 might WARN if we fail, but due the way we
798 * (badly) handle hard rfkill, we might fail here
799 */
800 if (iwl_is_rfkill(priv->shrd))
801 ret = 0;
802
803 mutex_unlock(&priv->shrd->mutex);
804 IWL_DEBUG_MAC80211(priv, "leave\n");
805
806 return ret;
807 }
808
809 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
810 struct ieee80211_channel_switch *ch_switch)
811 {
812 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
813 const struct iwl_channel_info *ch_info;
814 struct ieee80211_conf *conf = &hw->conf;
815 struct ieee80211_channel *channel = ch_switch->channel;
816 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
817 /*
818 * MULTI-FIXME
819 * When we add support for multiple interfaces, we need to
820 * revisit this. The channel switch command in the device
821 * only affects the BSS context, but what does that really
822 * mean? And what if we get a CSA on the second interface?
823 * This needs a lot of work.
824 */
825 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
826 u16 ch;
827
828 IWL_DEBUG_MAC80211(priv, "enter\n");
829
830 mutex_lock(&priv->shrd->mutex);
831
832 if (iwl_is_rfkill(priv->shrd))
833 goto out;
834
835 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
836 test_bit(STATUS_SCANNING, &priv->shrd->status) ||
837 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
838 goto out;
839
840 if (!iwl_is_associated_ctx(ctx))
841 goto out;
842
843 if (!cfg(priv)->lib->set_channel_switch)
844 goto out;
845
846 ch = channel->hw_value;
847 if (le16_to_cpu(ctx->active.channel) == ch)
848 goto out;
849
850 ch_info = iwl_get_channel_info(priv, channel->band, ch);
851 if (!is_channel_valid(ch_info)) {
852 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
853 goto out;
854 }
855
856 priv->current_ht_config.smps = conf->smps_mode;
857
858 /* Configure HT40 channels */
859 ctx->ht.enabled = conf_is_ht(conf);
860 if (ctx->ht.enabled)
861 iwlagn_config_ht40(conf, ctx);
862 else
863 ctx->ht.is_40mhz = false;
864
865 if ((le16_to_cpu(ctx->staging.channel) != ch))
866 ctx->staging.flags = 0;
867
868 iwl_set_rxon_channel(priv, channel, ctx);
869 iwl_set_rxon_ht(priv, ht_conf);
870 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
871
872 iwl_set_rate(priv);
873 /*
874 * at this point, staging_rxon has the
875 * configuration for channel switch
876 */
877 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
878 priv->switch_channel = cpu_to_le16(ch);
879 if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
880 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
881 priv->switch_channel = 0;
882 ieee80211_chswitch_done(ctx->vif, false);
883 }
884
885 out:
886 mutex_unlock(&priv->shrd->mutex);
887 IWL_DEBUG_MAC80211(priv, "leave\n");
888 }
889
890 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
891 unsigned int changed_flags,
892 unsigned int *total_flags,
893 u64 multicast)
894 {
895 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
896 __le32 filter_or = 0, filter_nand = 0;
897 struct iwl_rxon_context *ctx;
898
899 #define CHK(test, flag) do { \
900 if (*total_flags & (test)) \
901 filter_or |= (flag); \
902 else \
903 filter_nand |= (flag); \
904 } while (0)
905
906 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
907 changed_flags, *total_flags);
908
909 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
910 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
911 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
912 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
913
914 #undef CHK
915
916 mutex_lock(&priv->shrd->mutex);
917
918 for_each_context(priv, ctx) {
919 ctx->staging.filter_flags &= ~filter_nand;
920 ctx->staging.filter_flags |= filter_or;
921
922 /*
923 * Not committing directly because hardware can perform a scan,
924 * but we'll eventually commit the filter flags change anyway.
925 */
926 }
927
928 mutex_unlock(&priv->shrd->mutex);
929
930 /*
931 * Receiving all multicast frames is always enabled by the
932 * default flags setup in iwl_connection_init_rx_config()
933 * since we currently do not support programming multicast
934 * filters into the device.
935 */
936 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
937 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
938 }
939
940 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
941 {
942 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
943
944 mutex_lock(&priv->shrd->mutex);
945 IWL_DEBUG_MAC80211(priv, "enter\n");
946
947 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
948 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
949 goto done;
950 }
951 if (iwl_is_rfkill(priv->shrd)) {
952 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
953 goto done;
954 }
955
956 /*
957 * mac80211 will not push any more frames for transmit
958 * until the flush is completed
959 */
960 if (drop) {
961 IWL_DEBUG_MAC80211(priv, "send flush command\n");
962 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
963 IWL_ERR(priv, "flush request fail\n");
964 goto done;
965 }
966 }
967 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
968 iwl_trans_wait_tx_queue_empty(trans(priv));
969 done:
970 mutex_unlock(&priv->shrd->mutex);
971 IWL_DEBUG_MAC80211(priv, "leave\n");
972 }
973
974 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
975 struct ieee80211_channel *channel,
976 enum nl80211_channel_type channel_type,
977 int duration)
978 {
979 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
980 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
981 int err = 0;
982
983 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
984 return -EOPNOTSUPP;
985
986 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
987 return -EOPNOTSUPP;
988
989 IWL_DEBUG_MAC80211(priv, "enter\n");
990 mutex_lock(&priv->shrd->mutex);
991
992 if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
993 err = -EBUSY;
994 goto out;
995 }
996
997 priv->hw_roc_channel = channel;
998 priv->hw_roc_chantype = channel_type;
999 /* convert from ms to TU */
1000 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1001 priv->hw_roc_start_notified = false;
1002 cancel_delayed_work(&priv->hw_roc_disable_work);
1003
1004 if (!ctx->is_active) {
1005 static const struct iwl_qos_info default_qos_data = {
1006 .def_qos_parm = {
1007 .ac[0] = {
1008 .cw_min = cpu_to_le16(3),
1009 .cw_max = cpu_to_le16(7),
1010 .aifsn = 2,
1011 .edca_txop = cpu_to_le16(1504),
1012 },
1013 .ac[1] = {
1014 .cw_min = cpu_to_le16(7),
1015 .cw_max = cpu_to_le16(15),
1016 .aifsn = 2,
1017 .edca_txop = cpu_to_le16(3008),
1018 },
1019 .ac[2] = {
1020 .cw_min = cpu_to_le16(15),
1021 .cw_max = cpu_to_le16(1023),
1022 .aifsn = 3,
1023 },
1024 .ac[3] = {
1025 .cw_min = cpu_to_le16(15),
1026 .cw_max = cpu_to_le16(1023),
1027 .aifsn = 7,
1028 },
1029 },
1030 };
1031
1032 ctx->is_active = true;
1033 ctx->qos_data = default_qos_data;
1034 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1035 memcpy(ctx->staging.node_addr,
1036 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1037 ETH_ALEN);
1038 memcpy(ctx->staging.bssid_addr,
1039 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1040 ETH_ALEN);
1041 err = iwlagn_commit_rxon(priv, ctx);
1042 if (err)
1043 goto out;
1044 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1045 RXON_FILTER_PROMISC_MSK |
1046 RXON_FILTER_CTL2HOST_MSK;
1047
1048 err = iwlagn_commit_rxon(priv, ctx);
1049 if (err) {
1050 iwlagn_disable_roc(priv);
1051 goto out;
1052 }
1053 priv->hw_roc_setup = true;
1054 }
1055
1056 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1057 if (err)
1058 iwlagn_disable_roc(priv);
1059
1060 out:
1061 mutex_unlock(&priv->shrd->mutex);
1062 IWL_DEBUG_MAC80211(priv, "leave\n");
1063
1064 return err;
1065 }
1066
1067 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1068 {
1069 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1070
1071 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1072 return -EOPNOTSUPP;
1073
1074 IWL_DEBUG_MAC80211(priv, "enter\n");
1075 mutex_lock(&priv->shrd->mutex);
1076 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1077 iwlagn_disable_roc(priv);
1078 mutex_unlock(&priv->shrd->mutex);
1079 IWL_DEBUG_MAC80211(priv, "leave\n");
1080
1081 return 0;
1082 }
1083
1084 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1085 enum ieee80211_rssi_event rssi_event)
1086 {
1087 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1088
1089 IWL_DEBUG_MAC80211(priv, "enter\n");
1090 mutex_lock(&priv->shrd->mutex);
1091
1092 if (cfg(priv)->bt_params &&
1093 cfg(priv)->bt_params->advanced_bt_coexist) {
1094 if (rssi_event == RSSI_EVENT_LOW)
1095 priv->bt_enable_pspoll = true;
1096 else if (rssi_event == RSSI_EVENT_HIGH)
1097 priv->bt_enable_pspoll = false;
1098
1099 iwlagn_send_advance_bt_config(priv);
1100 } else {
1101 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1102 "ignoring RSSI callback\n");
1103 }
1104
1105 mutex_unlock(&priv->shrd->mutex);
1106 IWL_DEBUG_MAC80211(priv, "leave\n");
1107 }
1108
1109 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1110 struct ieee80211_sta *sta, bool set)
1111 {
1112 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1113
1114 queue_work(priv->workqueue, &priv->beacon_update);
1115
1116 return 0;
1117 }
1118
1119 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1120 struct ieee80211_vif *vif, u16 queue,
1121 const struct ieee80211_tx_queue_params *params)
1122 {
1123 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1124 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1125 struct iwl_rxon_context *ctx = vif_priv->ctx;
1126 int q;
1127
1128 if (WARN_ON(!ctx))
1129 return -EINVAL;
1130
1131 IWL_DEBUG_MAC80211(priv, "enter\n");
1132
1133 if (!iwl_is_ready_rf(priv->shrd)) {
1134 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1135 return -EIO;
1136 }
1137
1138 if (queue >= AC_NUM) {
1139 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1140 return 0;
1141 }
1142
1143 q = AC_NUM - 1 - queue;
1144
1145 mutex_lock(&priv->shrd->mutex);
1146
1147 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1148 cpu_to_le16(params->cw_min);
1149 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1150 cpu_to_le16(params->cw_max);
1151 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1152 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1153 cpu_to_le16((params->txop * 32));
1154
1155 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1156
1157 mutex_unlock(&priv->shrd->mutex);
1158
1159 IWL_DEBUG_MAC80211(priv, "leave\n");
1160 return 0;
1161 }
1162
1163 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1164 {
1165 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1166
1167 return priv->ibss_manager == IWL_IBSS_MANAGER;
1168 }
1169
1170 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1171 {
1172 iwl_connection_init_rx_config(priv, ctx);
1173
1174 iwlagn_set_rxon_chain(priv, ctx);
1175
1176 return iwlagn_commit_rxon(priv, ctx);
1177 }
1178
1179 static int iwl_setup_interface(struct iwl_priv *priv,
1180 struct iwl_rxon_context *ctx)
1181 {
1182 struct ieee80211_vif *vif = ctx->vif;
1183 int err;
1184
1185 lockdep_assert_held(&priv->shrd->mutex);
1186
1187 /*
1188 * This variable will be correct only when there's just
1189 * a single context, but all code using it is for hardware
1190 * that supports only one context.
1191 */
1192 priv->iw_mode = vif->type;
1193
1194 ctx->is_active = true;
1195
1196 err = iwl_set_mode(priv, ctx);
1197 if (err) {
1198 if (!ctx->always_active)
1199 ctx->is_active = false;
1200 return err;
1201 }
1202
1203 if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1204 vif->type == NL80211_IFTYPE_ADHOC) {
1205 /*
1206 * pretend to have high BT traffic as long as we
1207 * are operating in IBSS mode, as this will cause
1208 * the rate scaling etc. to behave as intended.
1209 */
1210 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1211 }
1212
1213 return 0;
1214 }
1215
1216 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1217 struct ieee80211_vif *vif)
1218 {
1219 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1220 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1221 struct iwl_rxon_context *tmp, *ctx = NULL;
1222 int err;
1223 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1224
1225 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1226 viftype, vif->addr);
1227
1228 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1229
1230 mutex_lock(&priv->shrd->mutex);
1231
1232 iwlagn_disable_roc(priv);
1233
1234 if (!iwl_is_ready_rf(priv->shrd)) {
1235 IWL_WARN(priv, "Try to add interface when device not ready\n");
1236 err = -EINVAL;
1237 goto out;
1238 }
1239
1240 for_each_context(priv, tmp) {
1241 u32 possible_modes =
1242 tmp->interface_modes | tmp->exclusive_interface_modes;
1243
1244 if (tmp->vif) {
1245 /* check if this busy context is exclusive */
1246 if (tmp->exclusive_interface_modes &
1247 BIT(tmp->vif->type)) {
1248 err = -EINVAL;
1249 goto out;
1250 }
1251 continue;
1252 }
1253
1254 if (!(possible_modes & BIT(viftype)))
1255 continue;
1256
1257 /* have maybe usable context w/o interface */
1258 ctx = tmp;
1259 break;
1260 }
1261
1262 if (!ctx) {
1263 err = -EOPNOTSUPP;
1264 goto out;
1265 }
1266
1267 vif_priv->ctx = ctx;
1268 ctx->vif = vif;
1269
1270 err = iwl_setup_interface(priv, ctx);
1271 if (!err)
1272 goto out;
1273
1274 ctx->vif = NULL;
1275 priv->iw_mode = NL80211_IFTYPE_STATION;
1276 out:
1277 mutex_unlock(&priv->shrd->mutex);
1278
1279 IWL_DEBUG_MAC80211(priv, "leave\n");
1280 return err;
1281 }
1282
1283 static void iwl_teardown_interface(struct iwl_priv *priv,
1284 struct ieee80211_vif *vif,
1285 bool mode_change)
1286 {
1287 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1288
1289 lockdep_assert_held(&priv->shrd->mutex);
1290
1291 if (priv->scan_vif == vif) {
1292 iwl_scan_cancel_timeout(priv, 200);
1293 iwl_force_scan_end(priv);
1294 }
1295
1296 if (!mode_change) {
1297 iwl_set_mode(priv, ctx);
1298 if (!ctx->always_active)
1299 ctx->is_active = false;
1300 }
1301
1302 /*
1303 * When removing the IBSS interface, overwrite the
1304 * BT traffic load with the stored one from the last
1305 * notification, if any. If this is a device that
1306 * doesn't implement this, this has no effect since
1307 * both values are the same and zero.
1308 */
1309 if (vif->type == NL80211_IFTYPE_ADHOC)
1310 priv->bt_traffic_load = priv->last_bt_traffic_load;
1311 }
1312
1313 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1314 struct ieee80211_vif *vif)
1315 {
1316 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1317 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1318
1319 IWL_DEBUG_MAC80211(priv, "enter\n");
1320
1321 mutex_lock(&priv->shrd->mutex);
1322
1323 if (WARN_ON(ctx->vif != vif)) {
1324 struct iwl_rxon_context *tmp;
1325 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1326 for_each_context(priv, tmp)
1327 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1328 tmp->ctxid, tmp, tmp->vif);
1329 }
1330 ctx->vif = NULL;
1331
1332 iwl_teardown_interface(priv, vif, false);
1333
1334 mutex_unlock(&priv->shrd->mutex);
1335
1336 IWL_DEBUG_MAC80211(priv, "leave\n");
1337
1338 }
1339
1340 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1341 struct ieee80211_vif *vif,
1342 enum nl80211_iftype newtype, bool newp2p)
1343 {
1344 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1345 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1346 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1347 struct iwl_rxon_context *tmp;
1348 enum nl80211_iftype newviftype = newtype;
1349 u32 interface_modes;
1350 int err;
1351
1352 IWL_DEBUG_MAC80211(priv, "enter\n");
1353
1354 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1355
1356 mutex_lock(&priv->shrd->mutex);
1357
1358 if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1359 /*
1360 * Huh? But wait ... this can maybe happen when
1361 * we're in the middle of a firmware restart!
1362 */
1363 err = -EBUSY;
1364 goto out;
1365 }
1366
1367 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1368
1369 if (!(interface_modes & BIT(newtype))) {
1370 err = -EBUSY;
1371 goto out;
1372 }
1373
1374 /*
1375 * Refuse a change that should be done by moving from the PAN
1376 * context to the BSS context instead, if the BSS context is
1377 * available and can support the new interface type.
1378 */
1379 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1380 (bss_ctx->interface_modes & BIT(newtype) ||
1381 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1382 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1383 err = -EBUSY;
1384 goto out;
1385 }
1386
1387 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1388 for_each_context(priv, tmp) {
1389 if (ctx == tmp)
1390 continue;
1391
1392 if (!tmp->vif)
1393 continue;
1394
1395 /*
1396 * The current mode switch would be exclusive, but
1397 * another context is active ... refuse the switch.
1398 */
1399 err = -EBUSY;
1400 goto out;
1401 }
1402 }
1403
1404 /* success */
1405 iwl_teardown_interface(priv, vif, true);
1406 vif->type = newviftype;
1407 vif->p2p = newp2p;
1408 err = iwl_setup_interface(priv, ctx);
1409 WARN_ON(err);
1410 /*
1411 * We've switched internally, but submitting to the
1412 * device may have failed for some reason. Mask this
1413 * error, because otherwise mac80211 will not switch
1414 * (and set the interface type back) and we'll be
1415 * out of sync with it.
1416 */
1417 err = 0;
1418
1419 out:
1420 mutex_unlock(&priv->shrd->mutex);
1421 IWL_DEBUG_MAC80211(priv, "leave\n");
1422
1423 return err;
1424 }
1425
1426 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1427 struct ieee80211_vif *vif,
1428 struct cfg80211_scan_request *req)
1429 {
1430 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1431 int ret;
1432
1433 IWL_DEBUG_MAC80211(priv, "enter\n");
1434
1435 if (req->n_channels == 0)
1436 return -EINVAL;
1437
1438 mutex_lock(&priv->shrd->mutex);
1439
1440 /*
1441 * If an internal scan is in progress, just set
1442 * up the scan_request as per above.
1443 */
1444 if (priv->scan_type != IWL_SCAN_NORMAL) {
1445 IWL_DEBUG_SCAN(priv,
1446 "SCAN request during internal scan - defer\n");
1447 priv->scan_request = req;
1448 priv->scan_vif = vif;
1449 ret = 0;
1450 } else {
1451 priv->scan_request = req;
1452 priv->scan_vif = vif;
1453 /*
1454 * mac80211 will only ask for one band at a time
1455 * so using channels[0] here is ok
1456 */
1457 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1458 req->channels[0]->band);
1459 if (ret) {
1460 priv->scan_request = NULL;
1461 priv->scan_vif = NULL;
1462 }
1463 }
1464
1465 IWL_DEBUG_MAC80211(priv, "leave\n");
1466
1467 mutex_unlock(&priv->shrd->mutex);
1468
1469 return ret;
1470 }
1471
1472 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1473 {
1474 struct iwl_addsta_cmd cmd = {
1475 .mode = STA_CONTROL_MODIFY_MSK,
1476 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1477 .sta.sta_id = sta_id,
1478 };
1479
1480 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1481 }
1482
1483 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1484 struct ieee80211_vif *vif,
1485 enum sta_notify_cmd cmd,
1486 struct ieee80211_sta *sta)
1487 {
1488 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1489 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1490 int sta_id;
1491
1492 IWL_DEBUG_MAC80211(priv, "enter\n");
1493
1494 switch (cmd) {
1495 case STA_NOTIFY_SLEEP:
1496 WARN_ON(!sta_priv->client);
1497 sta_priv->asleep = true;
1498 if (atomic_read(&sta_priv->pending_frames) > 0)
1499 ieee80211_sta_block_awake(hw, sta, true);
1500 break;
1501 case STA_NOTIFY_AWAKE:
1502 WARN_ON(!sta_priv->client);
1503 if (!sta_priv->asleep)
1504 break;
1505 sta_priv->asleep = false;
1506 sta_id = iwl_sta_id(sta);
1507 if (sta_id != IWL_INVALID_STATION)
1508 iwl_sta_modify_ps_wake(priv, sta_id);
1509 break;
1510 default:
1511 break;
1512 }
1513 IWL_DEBUG_MAC80211(priv, "leave\n");
1514 }
1515
1516 struct ieee80211_ops iwlagn_hw_ops = {
1517 .tx = iwlagn_mac_tx,
1518 .start = iwlagn_mac_start,
1519 .stop = iwlagn_mac_stop,
1520 #ifdef CONFIG_PM_SLEEP
1521 .suspend = iwlagn_mac_suspend,
1522 .resume = iwlagn_mac_resume,
1523 #endif
1524 .add_interface = iwlagn_mac_add_interface,
1525 .remove_interface = iwlagn_mac_remove_interface,
1526 .change_interface = iwlagn_mac_change_interface,
1527 .config = iwlagn_mac_config,
1528 .configure_filter = iwlagn_configure_filter,
1529 .set_key = iwlagn_mac_set_key,
1530 .update_tkip_key = iwlagn_mac_update_tkip_key,
1531 .set_rekey_data = iwlagn_mac_set_rekey_data,
1532 .conf_tx = iwlagn_mac_conf_tx,
1533 .bss_info_changed = iwlagn_bss_info_changed,
1534 .ampdu_action = iwlagn_mac_ampdu_action,
1535 .hw_scan = iwlagn_mac_hw_scan,
1536 .sta_notify = iwlagn_mac_sta_notify,
1537 .sta_state = iwlagn_mac_sta_state,
1538 .channel_switch = iwlagn_mac_channel_switch,
1539 .flush = iwlagn_mac_flush,
1540 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1541 .remain_on_channel = iwlagn_mac_remain_on_channel,
1542 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1543 .rssi_callback = iwlagn_mac_rssi_callback,
1544 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1545 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1546 .set_tim = iwlagn_mac_set_tim,
1547 };
1548
1549 /* This function both allocates and initializes hw and priv. */
1550 struct ieee80211_hw *iwl_alloc_all(void)
1551 {
1552 struct iwl_priv *priv;
1553 struct iwl_op_mode *op_mode;
1554 /* mac80211 allocates memory for this device instance, including
1555 * space for this driver's private structure */
1556 struct ieee80211_hw *hw;
1557
1558 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1559 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1560 if (!hw)
1561 goto out;
1562
1563 op_mode = hw->priv;
1564 priv = IWL_OP_MODE_GET_DVM(op_mode);
1565 priv->hw = hw;
1566
1567 out:
1568 return hw;
1569 }
Linux kernel - Deliverables
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