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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
[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-io.h"
48 #include "iwl-agn-calib.h"
49 #include "iwl-agn.h"
50 #include "iwl-trans.h"
51 #include "iwl-op-mode.h"
52 #include "iwl-modparams.h"
53
54 /*****************************************************************************
55 *
56 * mac80211 entry point functions
57 *
58 *****************************************************************************/
59
60 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
61 {
62 .max = 1,
63 .types = BIT(NL80211_IFTYPE_STATION),
64 },
65 {
66 .max = 1,
67 .types = BIT(NL80211_IFTYPE_AP),
68 },
69 };
70
71 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
72 {
73 .max = 2,
74 .types = BIT(NL80211_IFTYPE_STATION),
75 },
76 };
77
78 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
79 {
80 .max = 1,
81 .types = BIT(NL80211_IFTYPE_STATION),
82 },
83 {
84 .max = 1,
85 .types = BIT(NL80211_IFTYPE_P2P_GO) |
86 BIT(NL80211_IFTYPE_AP),
87 },
88 };
89
90 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
91 {
92 .max = 2,
93 .types = BIT(NL80211_IFTYPE_STATION),
94 },
95 {
96 .max = 1,
97 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
98 },
99 };
100
101 static const struct ieee80211_iface_combination
102 iwlagn_iface_combinations_dualmode[] = {
103 { .num_different_channels = 1,
104 .max_interfaces = 2,
105 .beacon_int_infra_match = true,
106 .limits = iwlagn_sta_ap_limits,
107 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
108 },
109 { .num_different_channels = 1,
110 .max_interfaces = 2,
111 .limits = iwlagn_2sta_limits,
112 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
113 },
114 };
115
116 static const struct ieee80211_iface_combination
117 iwlagn_iface_combinations_p2p[] = {
118 { .num_different_channels = 1,
119 .max_interfaces = 2,
120 .beacon_int_infra_match = true,
121 .limits = iwlagn_p2p_sta_go_limits,
122 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
123 },
124 { .num_different_channels = 1,
125 .max_interfaces = 2,
126 .limits = iwlagn_p2p_2sta_limits,
127 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
128 },
129 };
130
131 /*
132 * Not a mac80211 entry point function, but it fits in with all the
133 * other mac80211 functions grouped here.
134 */
135 int iwlagn_mac_setup_register(struct iwl_priv *priv,
136 const struct iwl_ucode_capabilities *capa)
137 {
138 int ret;
139 struct ieee80211_hw *hw = priv->hw;
140 struct iwl_rxon_context *ctx;
141
142 hw->rate_control_algorithm = "iwl-agn-rs";
143
144 /* Tell mac80211 our characteristics */
145 hw->flags = IEEE80211_HW_SIGNAL_DBM |
146 IEEE80211_HW_AMPDU_AGGREGATION |
147 IEEE80211_HW_NEED_DTIM_PERIOD |
148 IEEE80211_HW_SPECTRUM_MGMT |
149 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
150 IEEE80211_HW_QUEUE_CONTROL |
151 IEEE80211_HW_SUPPORTS_PS |
152 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
153 IEEE80211_HW_WANT_MONITOR_VIF |
154 IEEE80211_HW_SCAN_WHILE_IDLE;
155
156 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
157
158 /*
159 * Including the following line will crash some AP's. This
160 * workaround removes the stimulus which causes the crash until
161 * the AP software can be fixed.
162 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
163 */
164
165 if (priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE)
166 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
167 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
168
169 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
170 /* enable 11w if the uCode advertise */
171 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
172 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
173 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
174
175 hw->sta_data_size = sizeof(struct iwl_station_priv);
176 hw->vif_data_size = sizeof(struct iwl_vif_priv);
177
178 for_each_context(priv, ctx) {
179 hw->wiphy->interface_modes |= ctx->interface_modes;
180 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
181 }
182
183 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
184
185 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
186 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
187 hw->wiphy->n_iface_combinations =
188 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
189 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
190 hw->wiphy->iface_combinations =
191 iwlagn_iface_combinations_dualmode;
192 hw->wiphy->n_iface_combinations =
193 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
194 }
195
196 hw->wiphy->max_remain_on_channel_duration = 1000;
197
198 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
199 WIPHY_FLAG_DISABLE_BEACON_HINTS |
200 WIPHY_FLAG_IBSS_RSN;
201
202 #ifdef CONFIG_PM_SLEEP
203 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
204 priv->trans->ops->wowlan_suspend &&
205 device_can_wakeup(priv->trans->dev)) {
206 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
207 WIPHY_WOWLAN_DISCONNECT |
208 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
209 WIPHY_WOWLAN_RFKILL_RELEASE;
210 if (!iwlwifi_mod_params.sw_crypto)
211 hw->wiphy->wowlan.flags |=
212 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
213 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
214
215 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
216 hw->wiphy->wowlan.pattern_min_len =
217 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
218 hw->wiphy->wowlan.pattern_max_len =
219 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
220 }
221 #endif
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 iwl_leds_exit(priv);
255 return ret;
256 }
257 priv->mac80211_registered = 1;
258
259 return 0;
260 }
261
262 void iwlagn_mac_unregister(struct iwl_priv *priv)
263 {
264 if (!priv->mac80211_registered)
265 return;
266 iwl_leds_exit(priv);
267 ieee80211_unregister_hw(priv->hw);
268 priv->mac80211_registered = 0;
269 }
270
271 static int __iwl_up(struct iwl_priv *priv)
272 {
273 struct iwl_rxon_context *ctx;
274 int ret;
275
276 lockdep_assert_held(&priv->mutex);
277
278 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
279 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
280 return -EIO;
281 }
282
283 for_each_context(priv, ctx) {
284 ret = iwlagn_alloc_bcast_station(priv, ctx);
285 if (ret) {
286 iwl_dealloc_bcast_stations(priv);
287 return ret;
288 }
289 }
290
291 ret = iwl_run_init_ucode(priv);
292 if (ret) {
293 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
294 goto error;
295 }
296
297 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
298 if (ret) {
299 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
300 goto error;
301 }
302
303 ret = iwl_alive_start(priv);
304 if (ret)
305 goto error;
306 return 0;
307
308 error:
309 set_bit(STATUS_EXIT_PENDING, &priv->status);
310 iwl_down(priv);
311 clear_bit(STATUS_EXIT_PENDING, &priv->status);
312
313 IWL_ERR(priv, "Unable to initialize device.\n");
314 return ret;
315 }
316
317 static int iwlagn_mac_start(struct ieee80211_hw *hw)
318 {
319 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
320 int ret;
321
322 IWL_DEBUG_MAC80211(priv, "enter\n");
323
324 /* we should be verifying the device is ready to be opened */
325 mutex_lock(&priv->mutex);
326 ret = __iwl_up(priv);
327 mutex_unlock(&priv->mutex);
328 if (ret)
329 return ret;
330
331 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
332
333 /* Now we should be done, and the READY bit should be set. */
334 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
335 ret = -EIO;
336
337 iwlagn_led_enable(priv);
338
339 priv->is_open = 1;
340 IWL_DEBUG_MAC80211(priv, "leave\n");
341 return 0;
342 }
343
344 void iwlagn_mac_stop(struct ieee80211_hw *hw)
345 {
346 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
347
348 IWL_DEBUG_MAC80211(priv, "enter\n");
349
350 if (!priv->is_open)
351 return;
352
353 priv->is_open = 0;
354
355 mutex_lock(&priv->mutex);
356 iwl_down(priv);
357 mutex_unlock(&priv->mutex);
358
359 iwl_cancel_deferred_work(priv);
360
361 flush_workqueue(priv->workqueue);
362
363 /* User space software may expect getting rfkill changes
364 * even if interface is down, trans->down will leave the RF
365 * kill interrupt enabled
366 */
367 iwl_trans_stop_hw(priv->trans, false);
368
369 IWL_DEBUG_MAC80211(priv, "leave\n");
370 }
371
372 void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
373 struct ieee80211_vif *vif,
374 struct cfg80211_gtk_rekey_data *data)
375 {
376 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
377
378 if (iwlwifi_mod_params.sw_crypto)
379 return;
380
381 IWL_DEBUG_MAC80211(priv, "enter\n");
382 mutex_lock(&priv->mutex);
383
384 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
385 goto out;
386
387 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
388 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
389 priv->replay_ctr =
390 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
391 priv->have_rekey_data = true;
392
393 out:
394 mutex_unlock(&priv->mutex);
395 IWL_DEBUG_MAC80211(priv, "leave\n");
396 }
397
398 #ifdef CONFIG_PM_SLEEP
399
400 int iwlagn_mac_suspend(struct ieee80211_hw *hw, 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 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 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 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 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 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 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 const struct iwl_channel_info *ch_info;
850 struct ieee80211_conf *conf = &hw->conf;
851 struct ieee80211_channel *channel = ch_switch->channel;
852 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
853 /*
854 * MULTI-FIXME
855 * When we add support for multiple interfaces, we need to
856 * revisit this. The channel switch command in the device
857 * only affects the BSS context, but what does that really
858 * mean? And what if we get a CSA on the second interface?
859 * This needs a lot of work.
860 */
861 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
862 u16 ch;
863
864 IWL_DEBUG_MAC80211(priv, "enter\n");
865
866 mutex_lock(&priv->mutex);
867
868 if (iwl_is_rfkill(priv))
869 goto out;
870
871 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
872 test_bit(STATUS_SCANNING, &priv->status) ||
873 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
874 goto out;
875
876 if (!iwl_is_associated_ctx(ctx))
877 goto out;
878
879 if (!priv->lib->set_channel_switch)
880 goto out;
881
882 ch = channel->hw_value;
883 if (le16_to_cpu(ctx->active.channel) == ch)
884 goto out;
885
886 ch_info = iwl_get_channel_info(priv, channel->band, ch);
887 if (!is_channel_valid(ch_info)) {
888 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
889 goto out;
890 }
891
892 priv->current_ht_config.smps = conf->smps_mode;
893
894 /* Configure HT40 channels */
895 ctx->ht.enabled = conf_is_ht(conf);
896 if (ctx->ht.enabled)
897 iwlagn_config_ht40(conf, ctx);
898 else
899 ctx->ht.is_40mhz = false;
900
901 if ((le16_to_cpu(ctx->staging.channel) != ch))
902 ctx->staging.flags = 0;
903
904 iwl_set_rxon_channel(priv, channel, ctx);
905 iwl_set_rxon_ht(priv, ht_conf);
906 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
907
908 /*
909 * at this point, staging_rxon has the
910 * configuration for channel switch
911 */
912 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
913 priv->switch_channel = cpu_to_le16(ch);
914 if (priv->lib->set_channel_switch(priv, ch_switch)) {
915 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
916 priv->switch_channel = 0;
917 ieee80211_chswitch_done(ctx->vif, false);
918 }
919
920 out:
921 mutex_unlock(&priv->mutex);
922 IWL_DEBUG_MAC80211(priv, "leave\n");
923 }
924
925 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
926 {
927 /*
928 * MULTI-FIXME
929 * See iwlagn_mac_channel_switch.
930 */
931 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
932
933 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
934 return;
935
936 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
937 ieee80211_chswitch_done(ctx->vif, is_success);
938 }
939
940 void iwlagn_configure_filter(struct ieee80211_hw *hw,
941 unsigned int changed_flags,
942 unsigned int *total_flags,
943 u64 multicast)
944 {
945 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
946 __le32 filter_or = 0, filter_nand = 0;
947 struct iwl_rxon_context *ctx;
948
949 #define CHK(test, flag) do { \
950 if (*total_flags & (test)) \
951 filter_or |= (flag); \
952 else \
953 filter_nand |= (flag); \
954 } while (0)
955
956 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
957 changed_flags, *total_flags);
958
959 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
960 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
961 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
962 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
963
964 #undef CHK
965
966 mutex_lock(&priv->mutex);
967
968 for_each_context(priv, ctx) {
969 ctx->staging.filter_flags &= ~filter_nand;
970 ctx->staging.filter_flags |= filter_or;
971
972 /*
973 * Not committing directly because hardware can perform a scan,
974 * but we'll eventually commit the filter flags change anyway.
975 */
976 }
977
978 mutex_unlock(&priv->mutex);
979
980 /*
981 * Receiving all multicast frames is always enabled by the
982 * default flags setup in iwl_connection_init_rx_config()
983 * since we currently do not support programming multicast
984 * filters into the device.
985 */
986 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
987 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
988 }
989
990 void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
991 {
992 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
993
994 mutex_lock(&priv->mutex);
995 IWL_DEBUG_MAC80211(priv, "enter\n");
996
997 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
998 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
999 goto done;
1000 }
1001 if (iwl_is_rfkill(priv)) {
1002 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1003 goto done;
1004 }
1005
1006 /*
1007 * mac80211 will not push any more frames for transmit
1008 * until the flush is completed
1009 */
1010 if (drop) {
1011 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1012 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1013 IWL_ERR(priv, "flush request fail\n");
1014 goto done;
1015 }
1016 }
1017 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1018 iwl_trans_wait_tx_queue_empty(priv->trans);
1019 done:
1020 mutex_unlock(&priv->mutex);
1021 IWL_DEBUG_MAC80211(priv, "leave\n");
1022 }
1023
1024 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1025 struct ieee80211_channel *channel,
1026 enum nl80211_channel_type channel_type,
1027 int duration)
1028 {
1029 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1030 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1031 int err = 0;
1032
1033 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1034 return -EOPNOTSUPP;
1035
1036 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1037 return -EOPNOTSUPP;
1038
1039 IWL_DEBUG_MAC80211(priv, "enter\n");
1040 mutex_lock(&priv->mutex);
1041
1042 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1043 err = -EBUSY;
1044 goto out;
1045 }
1046
1047 priv->hw_roc_channel = channel;
1048 priv->hw_roc_chantype = channel_type;
1049 /* convert from ms to TU */
1050 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1051 priv->hw_roc_start_notified = false;
1052 cancel_delayed_work(&priv->hw_roc_disable_work);
1053
1054 if (!ctx->is_active) {
1055 static const struct iwl_qos_info default_qos_data = {
1056 .def_qos_parm = {
1057 .ac[0] = {
1058 .cw_min = cpu_to_le16(3),
1059 .cw_max = cpu_to_le16(7),
1060 .aifsn = 2,
1061 .edca_txop = cpu_to_le16(1504),
1062 },
1063 .ac[1] = {
1064 .cw_min = cpu_to_le16(7),
1065 .cw_max = cpu_to_le16(15),
1066 .aifsn = 2,
1067 .edca_txop = cpu_to_le16(3008),
1068 },
1069 .ac[2] = {
1070 .cw_min = cpu_to_le16(15),
1071 .cw_max = cpu_to_le16(1023),
1072 .aifsn = 3,
1073 },
1074 .ac[3] = {
1075 .cw_min = cpu_to_le16(15),
1076 .cw_max = cpu_to_le16(1023),
1077 .aifsn = 7,
1078 },
1079 },
1080 };
1081
1082 ctx->is_active = true;
1083 ctx->qos_data = default_qos_data;
1084 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1085 memcpy(ctx->staging.node_addr,
1086 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1087 ETH_ALEN);
1088 memcpy(ctx->staging.bssid_addr,
1089 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1090 ETH_ALEN);
1091 err = iwlagn_commit_rxon(priv, ctx);
1092 if (err)
1093 goto out;
1094 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1095 RXON_FILTER_PROMISC_MSK |
1096 RXON_FILTER_CTL2HOST_MSK;
1097
1098 err = iwlagn_commit_rxon(priv, ctx);
1099 if (err) {
1100 iwlagn_disable_roc(priv);
1101 goto out;
1102 }
1103 priv->hw_roc_setup = true;
1104 }
1105
1106 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1107 if (err)
1108 iwlagn_disable_roc(priv);
1109
1110 out:
1111 mutex_unlock(&priv->mutex);
1112 IWL_DEBUG_MAC80211(priv, "leave\n");
1113
1114 return err;
1115 }
1116
1117 int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1118 {
1119 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1120
1121 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1122 return -EOPNOTSUPP;
1123
1124 IWL_DEBUG_MAC80211(priv, "enter\n");
1125 mutex_lock(&priv->mutex);
1126 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1127 iwlagn_disable_roc(priv);
1128 mutex_unlock(&priv->mutex);
1129 IWL_DEBUG_MAC80211(priv, "leave\n");
1130
1131 return 0;
1132 }
1133
1134 void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1135 enum ieee80211_rssi_event rssi_event)
1136 {
1137 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1138
1139 IWL_DEBUG_MAC80211(priv, "enter\n");
1140 mutex_lock(&priv->mutex);
1141
1142 if (priv->cfg->bt_params &&
1143 priv->cfg->bt_params->advanced_bt_coexist) {
1144 if (rssi_event == RSSI_EVENT_LOW)
1145 priv->bt_enable_pspoll = true;
1146 else if (rssi_event == RSSI_EVENT_HIGH)
1147 priv->bt_enable_pspoll = false;
1148
1149 iwlagn_send_advance_bt_config(priv);
1150 } else {
1151 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1152 "ignoring RSSI callback\n");
1153 }
1154
1155 mutex_unlock(&priv->mutex);
1156 IWL_DEBUG_MAC80211(priv, "leave\n");
1157 }
1158
1159 int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1160 struct ieee80211_sta *sta, bool set)
1161 {
1162 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1163
1164 queue_work(priv->workqueue, &priv->beacon_update);
1165
1166 return 0;
1167 }
1168
1169 int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1170 struct ieee80211_vif *vif, u16 queue,
1171 const struct ieee80211_tx_queue_params *params)
1172 {
1173 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1174 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1175 struct iwl_rxon_context *ctx = vif_priv->ctx;
1176 int q;
1177
1178 if (WARN_ON(!ctx))
1179 return -EINVAL;
1180
1181 IWL_DEBUG_MAC80211(priv, "enter\n");
1182
1183 if (!iwl_is_ready_rf(priv)) {
1184 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1185 return -EIO;
1186 }
1187
1188 if (queue >= AC_NUM) {
1189 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1190 return 0;
1191 }
1192
1193 q = AC_NUM - 1 - queue;
1194
1195 mutex_lock(&priv->mutex);
1196
1197 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1198 cpu_to_le16(params->cw_min);
1199 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1200 cpu_to_le16(params->cw_max);
1201 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1202 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1203 cpu_to_le16((params->txop * 32));
1204
1205 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1206
1207 mutex_unlock(&priv->mutex);
1208
1209 IWL_DEBUG_MAC80211(priv, "leave\n");
1210 return 0;
1211 }
1212
1213 int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1214 {
1215 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1216
1217 return priv->ibss_manager == IWL_IBSS_MANAGER;
1218 }
1219
1220 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1221 {
1222 iwl_connection_init_rx_config(priv, ctx);
1223
1224 iwlagn_set_rxon_chain(priv, ctx);
1225
1226 return iwlagn_commit_rxon(priv, ctx);
1227 }
1228
1229 int iwl_setup_interface(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1230 {
1231 struct ieee80211_vif *vif = ctx->vif;
1232 int err, ac;
1233
1234 lockdep_assert_held(&priv->mutex);
1235
1236 /*
1237 * This variable will be correct only when there's just
1238 * a single context, but all code using it is for hardware
1239 * that supports only one context.
1240 */
1241 priv->iw_mode = vif->type;
1242
1243 ctx->is_active = true;
1244
1245 err = iwl_set_mode(priv, ctx);
1246 if (err) {
1247 if (!ctx->always_active)
1248 ctx->is_active = false;
1249 return err;
1250 }
1251
1252 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1253 vif->type == NL80211_IFTYPE_ADHOC) {
1254 /*
1255 * pretend to have high BT traffic as long as we
1256 * are operating in IBSS mode, as this will cause
1257 * the rate scaling etc. to behave as intended.
1258 */
1259 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1260 }
1261
1262 /* set up queue mappings */
1263 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1264 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1265
1266 if (vif->type == NL80211_IFTYPE_AP)
1267 vif->cab_queue = ctx->mcast_queue;
1268 else
1269 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1270
1271 return 0;
1272 }
1273
1274 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1275 struct ieee80211_vif *vif)
1276 {
1277 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1278 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1279 struct iwl_rxon_context *tmp, *ctx = NULL;
1280 int err;
1281 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1282 bool reset = false;
1283
1284 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1285 viftype, vif->addr);
1286
1287 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1288
1289 mutex_lock(&priv->mutex);
1290
1291 iwlagn_disable_roc(priv);
1292
1293 if (!iwl_is_ready_rf(priv)) {
1294 IWL_WARN(priv, "Try to add interface when device not ready\n");
1295 err = -EINVAL;
1296 goto out;
1297 }
1298
1299 for_each_context(priv, tmp) {
1300 u32 possible_modes =
1301 tmp->interface_modes | tmp->exclusive_interface_modes;
1302
1303 if (tmp->vif) {
1304 /* On reset we need to add the same interface again */
1305 if (tmp->vif == vif) {
1306 reset = true;
1307 ctx = tmp;
1308 break;
1309 }
1310
1311 /* check if this busy context is exclusive */
1312 if (tmp->exclusive_interface_modes &
1313 BIT(tmp->vif->type)) {
1314 err = -EINVAL;
1315 goto out;
1316 }
1317 continue;
1318 }
1319
1320 if (!(possible_modes & BIT(viftype)))
1321 continue;
1322
1323 /* have maybe usable context w/o interface */
1324 ctx = tmp;
1325 break;
1326 }
1327
1328 if (!ctx) {
1329 err = -EOPNOTSUPP;
1330 goto out;
1331 }
1332
1333 vif_priv->ctx = ctx;
1334 ctx->vif = vif;
1335
1336 err = iwl_setup_interface(priv, ctx);
1337 if (!err || reset)
1338 goto out;
1339
1340 ctx->vif = NULL;
1341 priv->iw_mode = NL80211_IFTYPE_STATION;
1342 out:
1343 mutex_unlock(&priv->mutex);
1344
1345 IWL_DEBUG_MAC80211(priv, "leave\n");
1346 return err;
1347 }
1348
1349 void iwl_teardown_interface(struct iwl_priv *priv,
1350 struct ieee80211_vif *vif,
1351 bool mode_change)
1352 {
1353 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1354
1355 lockdep_assert_held(&priv->mutex);
1356
1357 if (priv->scan_vif == vif) {
1358 iwl_scan_cancel_timeout(priv, 200);
1359 iwl_force_scan_end(priv);
1360 }
1361
1362 if (!mode_change) {
1363 iwl_set_mode(priv, ctx);
1364 if (!ctx->always_active)
1365 ctx->is_active = false;
1366 }
1367
1368 /*
1369 * When removing the IBSS interface, overwrite the
1370 * BT traffic load with the stored one from the last
1371 * notification, if any. If this is a device that
1372 * doesn't implement this, this has no effect since
1373 * both values are the same and zero.
1374 */
1375 if (vif->type == NL80211_IFTYPE_ADHOC)
1376 priv->bt_traffic_load = priv->last_bt_traffic_load;
1377 }
1378
1379 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1380 struct ieee80211_vif *vif)
1381 {
1382 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1383 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1384
1385 IWL_DEBUG_MAC80211(priv, "enter\n");
1386
1387 mutex_lock(&priv->mutex);
1388
1389 if (WARN_ON(ctx->vif != vif)) {
1390 struct iwl_rxon_context *tmp;
1391 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1392 for_each_context(priv, tmp)
1393 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1394 tmp->ctxid, tmp, tmp->vif);
1395 }
1396 ctx->vif = NULL;
1397
1398 iwl_teardown_interface(priv, vif, false);
1399
1400 mutex_unlock(&priv->mutex);
1401
1402 IWL_DEBUG_MAC80211(priv, "leave\n");
1403
1404 }
1405
1406 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1407 struct ieee80211_vif *vif,
1408 enum nl80211_iftype newtype, bool newp2p)
1409 {
1410 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1411 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1412 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1413 struct iwl_rxon_context *tmp;
1414 enum nl80211_iftype newviftype = newtype;
1415 u32 interface_modes;
1416 int err;
1417
1418 IWL_DEBUG_MAC80211(priv, "enter\n");
1419
1420 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1421
1422 mutex_lock(&priv->mutex);
1423
1424 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1425 /*
1426 * Huh? But wait ... this can maybe happen when
1427 * we're in the middle of a firmware restart!
1428 */
1429 err = -EBUSY;
1430 goto out;
1431 }
1432
1433 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1434
1435 if (!(interface_modes & BIT(newtype))) {
1436 err = -EBUSY;
1437 goto out;
1438 }
1439
1440 /*
1441 * Refuse a change that should be done by moving from the PAN
1442 * context to the BSS context instead, if the BSS context is
1443 * available and can support the new interface type.
1444 */
1445 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1446 (bss_ctx->interface_modes & BIT(newtype) ||
1447 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1448 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1449 err = -EBUSY;
1450 goto out;
1451 }
1452
1453 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1454 for_each_context(priv, tmp) {
1455 if (ctx == tmp)
1456 continue;
1457
1458 if (!tmp->vif)
1459 continue;
1460
1461 /*
1462 * The current mode switch would be exclusive, but
1463 * another context is active ... refuse the switch.
1464 */
1465 err = -EBUSY;
1466 goto out;
1467 }
1468 }
1469
1470 /* success */
1471 iwl_teardown_interface(priv, vif, true);
1472 vif->type = newviftype;
1473 vif->p2p = newp2p;
1474 err = iwl_setup_interface(priv, ctx);
1475 WARN_ON(err);
1476 /*
1477 * We've switched internally, but submitting to the
1478 * device may have failed for some reason. Mask this
1479 * error, because otherwise mac80211 will not switch
1480 * (and set the interface type back) and we'll be
1481 * out of sync with it.
1482 */
1483 err = 0;
1484
1485 out:
1486 mutex_unlock(&priv->mutex);
1487 IWL_DEBUG_MAC80211(priv, "leave\n");
1488
1489 return err;
1490 }
1491
1492 int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1493 struct ieee80211_vif *vif,
1494 struct cfg80211_scan_request *req)
1495 {
1496 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1497 int ret;
1498
1499 IWL_DEBUG_MAC80211(priv, "enter\n");
1500
1501 if (req->n_channels == 0)
1502 return -EINVAL;
1503
1504 mutex_lock(&priv->mutex);
1505
1506 /*
1507 * If an internal scan is in progress, just set
1508 * up the scan_request as per above.
1509 */
1510 if (priv->scan_type != IWL_SCAN_NORMAL) {
1511 IWL_DEBUG_SCAN(priv,
1512 "SCAN request during internal scan - defer\n");
1513 priv->scan_request = req;
1514 priv->scan_vif = vif;
1515 ret = 0;
1516 } else {
1517 priv->scan_request = req;
1518 priv->scan_vif = vif;
1519 /*
1520 * mac80211 will only ask for one band at a time
1521 * so using channels[0] here is ok
1522 */
1523 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1524 req->channels[0]->band);
1525 if (ret) {
1526 priv->scan_request = NULL;
1527 priv->scan_vif = NULL;
1528 }
1529 }
1530
1531 IWL_DEBUG_MAC80211(priv, "leave\n");
1532
1533 mutex_unlock(&priv->mutex);
1534
1535 return ret;
1536 }
1537
1538 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1539 {
1540 struct iwl_addsta_cmd cmd = {
1541 .mode = STA_CONTROL_MODIFY_MSK,
1542 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1543 .sta.sta_id = sta_id,
1544 };
1545
1546 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1547 }
1548
1549 void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1550 struct ieee80211_vif *vif,
1551 enum sta_notify_cmd cmd,
1552 struct ieee80211_sta *sta)
1553 {
1554 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1555 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1556 int sta_id;
1557
1558 IWL_DEBUG_MAC80211(priv, "enter\n");
1559
1560 switch (cmd) {
1561 case STA_NOTIFY_SLEEP:
1562 WARN_ON(!sta_priv->client);
1563 sta_priv->asleep = true;
1564 if (atomic_read(&sta_priv->pending_frames) > 0)
1565 ieee80211_sta_block_awake(hw, sta, true);
1566 break;
1567 case STA_NOTIFY_AWAKE:
1568 WARN_ON(!sta_priv->client);
1569 if (!sta_priv->asleep)
1570 break;
1571 sta_priv->asleep = false;
1572 sta_id = iwl_sta_id(sta);
1573 if (sta_id != IWL_INVALID_STATION)
1574 iwl_sta_modify_ps_wake(priv, sta_id);
1575 break;
1576 default:
1577 break;
1578 }
1579 IWL_DEBUG_MAC80211(priv, "leave\n");
1580 }
1581
1582 struct ieee80211_ops iwlagn_hw_ops = {
1583 .tx = iwlagn_mac_tx,
1584 .start = iwlagn_mac_start,
1585 .stop = iwlagn_mac_stop,
1586 #ifdef CONFIG_PM_SLEEP
1587 .suspend = iwlagn_mac_suspend,
1588 .resume = iwlagn_mac_resume,
1589 .set_wakeup = iwlagn_mac_set_wakeup,
1590 #endif
1591 .add_interface = iwlagn_mac_add_interface,
1592 .remove_interface = iwlagn_mac_remove_interface,
1593 .change_interface = iwlagn_mac_change_interface,
1594 .config = iwlagn_mac_config,
1595 .configure_filter = iwlagn_configure_filter,
1596 .set_key = iwlagn_mac_set_key,
1597 .update_tkip_key = iwlagn_mac_update_tkip_key,
1598 .set_rekey_data = iwlagn_mac_set_rekey_data,
1599 .conf_tx = iwlagn_mac_conf_tx,
1600 .bss_info_changed = iwlagn_bss_info_changed,
1601 .ampdu_action = iwlagn_mac_ampdu_action,
1602 .hw_scan = iwlagn_mac_hw_scan,
1603 .sta_notify = iwlagn_mac_sta_notify,
1604 .sta_state = iwlagn_mac_sta_state,
1605 .channel_switch = iwlagn_mac_channel_switch,
1606 .flush = iwlagn_mac_flush,
1607 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1608 .remain_on_channel = iwlagn_mac_remain_on_channel,
1609 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1610 .rssi_callback = iwlagn_mac_rssi_callback,
1611 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1612 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1613 .set_tim = iwlagn_mac_set_tim,
1614 };
1615
1616 /* This function both allocates and initializes hw and priv. */
1617 struct ieee80211_hw *iwl_alloc_all(void)
1618 {
1619 struct iwl_priv *priv;
1620 struct iwl_op_mode *op_mode;
1621 /* mac80211 allocates memory for this device instance, including
1622 * space for this driver's private structure */
1623 struct ieee80211_hw *hw;
1624
1625 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1626 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1627 if (!hw)
1628 goto out;
1629
1630 op_mode = hw->priv;
1631 priv = IWL_OP_MODE_GET_DVM(op_mode);
1632 priv->hw = hw;
1633
1634 out:
1635 return hw;
1636 }
Linux kernel - Deliverables
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