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Merge branch 'x86/nuke386' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / dvm / mac80211.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/dma-mapping.h>
34 #include <linux/delay.h>
35 #include <linux/sched.h>
36 #include <linux/skbuff.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/if_arp.h>
40
41 #include <net/ieee80211_radiotap.h>
42 #include <net/mac80211.h>
43
44 #include <asm/div64.h>
45
46 #include "iwl-io.h"
47 #include "iwl-trans.h"
48 #include "iwl-op-mode.h"
49 #include "iwl-modparams.h"
50
51 #include "dev.h"
52 #include "calib.h"
53 #include "agn.h"
54
55 /*****************************************************************************
56 *
57 * mac80211 entry point functions
58 *
59 *****************************************************************************/
60
61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
62 {
63 .max = 1,
64 .types = BIT(NL80211_IFTYPE_STATION),
65 },
66 {
67 .max = 1,
68 .types = BIT(NL80211_IFTYPE_AP),
69 },
70 };
71
72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
73 {
74 .max = 2,
75 .types = BIT(NL80211_IFTYPE_STATION),
76 },
77 };
78
79 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
80 {
81 .max = 1,
82 .types = BIT(NL80211_IFTYPE_STATION),
83 },
84 {
85 .max = 1,
86 .types = BIT(NL80211_IFTYPE_P2P_GO) |
87 BIT(NL80211_IFTYPE_AP),
88 },
89 };
90
91 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
92 {
93 .max = 2,
94 .types = BIT(NL80211_IFTYPE_STATION),
95 },
96 {
97 .max = 1,
98 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
99 },
100 };
101
102 static const struct ieee80211_iface_combination
103 iwlagn_iface_combinations_dualmode[] = {
104 { .num_different_channels = 1,
105 .max_interfaces = 2,
106 .beacon_int_infra_match = true,
107 .limits = iwlagn_sta_ap_limits,
108 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
109 },
110 { .num_different_channels = 1,
111 .max_interfaces = 2,
112 .limits = iwlagn_2sta_limits,
113 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
114 },
115 };
116
117 static const struct ieee80211_iface_combination
118 iwlagn_iface_combinations_p2p[] = {
119 { .num_different_channels = 1,
120 .max_interfaces = 2,
121 .beacon_int_infra_match = true,
122 .limits = iwlagn_p2p_sta_go_limits,
123 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
124 },
125 { .num_different_channels = 1,
126 .max_interfaces = 2,
127 .limits = iwlagn_p2p_2sta_limits,
128 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
129 },
130 };
131
132 /*
133 * Not a mac80211 entry point function, but it fits in with all the
134 * other mac80211 functions grouped here.
135 */
136 int iwlagn_mac_setup_register(struct iwl_priv *priv,
137 const struct iwl_ucode_capabilities *capa)
138 {
139 int ret;
140 struct ieee80211_hw *hw = priv->hw;
141 struct iwl_rxon_context *ctx;
142
143 hw->rate_control_algorithm = "iwl-agn-rs";
144
145 /* Tell mac80211 our characteristics */
146 hw->flags = IEEE80211_HW_SIGNAL_DBM |
147 IEEE80211_HW_AMPDU_AGGREGATION |
148 IEEE80211_HW_NEED_DTIM_PERIOD |
149 IEEE80211_HW_SPECTRUM_MGMT |
150 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
151 IEEE80211_HW_QUEUE_CONTROL |
152 IEEE80211_HW_SUPPORTS_PS |
153 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
154 IEEE80211_HW_WANT_MONITOR_VIF |
155 IEEE80211_HW_SCAN_WHILE_IDLE;
156
157 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
158 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
159
160 /*
161 * Including the following line will crash some AP's. This
162 * workaround removes the stimulus which causes the crash until
163 * the AP software can be fixed.
164 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
165 */
166
167 if (priv->nvm_data->sku_cap_11n_enable)
168 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
169 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
170
171 /*
172 * Enable 11w if advertised by firmware and software crypto
173 * is not enabled (as the firmware will interpret some mgmt
174 * packets, so enabling it with software crypto isn't safe)
175 */
176 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
177 !iwlwifi_mod_params.sw_crypto)
178 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
179
180 hw->sta_data_size = sizeof(struct iwl_station_priv);
181 hw->vif_data_size = sizeof(struct iwl_vif_priv);
182
183 for_each_context(priv, ctx) {
184 hw->wiphy->interface_modes |= ctx->interface_modes;
185 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
186 }
187
188 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
189
190 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
191 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
192 hw->wiphy->n_iface_combinations =
193 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
194 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
195 hw->wiphy->iface_combinations =
196 iwlagn_iface_combinations_dualmode;
197 hw->wiphy->n_iface_combinations =
198 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
199 }
200
201 hw->wiphy->max_remain_on_channel_duration = 500;
202
203 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
204 WIPHY_FLAG_DISABLE_BEACON_HINTS |
205 WIPHY_FLAG_IBSS_RSN;
206
207 #ifdef CONFIG_PM_SLEEP
208 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
209 priv->trans->ops->wowlan_suspend &&
210 device_can_wakeup(priv->trans->dev)) {
211 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
212 WIPHY_WOWLAN_DISCONNECT |
213 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
214 WIPHY_WOWLAN_RFKILL_RELEASE;
215 if (!iwlwifi_mod_params.sw_crypto)
216 hw->wiphy->wowlan.flags |=
217 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
218 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
219
220 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
221 hw->wiphy->wowlan.pattern_min_len =
222 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
223 hw->wiphy->wowlan.pattern_max_len =
224 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
225 }
226 #endif
227
228 if (iwlwifi_mod_params.power_save)
229 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
230 else
231 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
232
233 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
234 /* we create the 802.11 header and a max-length SSID element */
235 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
236
237 /*
238 * We don't use all queues: 4 and 9 are unused and any
239 * aggregation queue gets mapped down to the AC queue.
240 */
241 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
242
243 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
244
245 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
246 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
247 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
248 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
249 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
250 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
251
252 hw->wiphy->hw_version = priv->trans->hw_id;
253
254 iwl_leds_init(priv);
255
256 ret = ieee80211_register_hw(priv->hw);
257 if (ret) {
258 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
259 iwl_leds_exit(priv);
260 return ret;
261 }
262 priv->mac80211_registered = 1;
263
264 return 0;
265 }
266
267 void iwlagn_mac_unregister(struct iwl_priv *priv)
268 {
269 if (!priv->mac80211_registered)
270 return;
271 iwl_leds_exit(priv);
272 ieee80211_unregister_hw(priv->hw);
273 priv->mac80211_registered = 0;
274 }
275
276 static int __iwl_up(struct iwl_priv *priv)
277 {
278 struct iwl_rxon_context *ctx;
279 int ret;
280
281 lockdep_assert_held(&priv->mutex);
282
283 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
284 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
285 return -EIO;
286 }
287
288 for_each_context(priv, ctx) {
289 ret = iwlagn_alloc_bcast_station(priv, ctx);
290 if (ret) {
291 iwl_dealloc_bcast_stations(priv);
292 return ret;
293 }
294 }
295
296 ret = iwl_run_init_ucode(priv);
297 if (ret) {
298 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
299 goto error;
300 }
301
302 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
303 if (ret) {
304 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
305 goto error;
306 }
307
308 ret = iwl_alive_start(priv);
309 if (ret)
310 goto error;
311 return 0;
312
313 error:
314 set_bit(STATUS_EXIT_PENDING, &priv->status);
315 iwl_down(priv);
316 clear_bit(STATUS_EXIT_PENDING, &priv->status);
317
318 IWL_ERR(priv, "Unable to initialize device.\n");
319 return ret;
320 }
321
322 static int iwlagn_mac_start(struct ieee80211_hw *hw)
323 {
324 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
325 int ret;
326
327 IWL_DEBUG_MAC80211(priv, "enter\n");
328
329 /* we should be verifying the device is ready to be opened */
330 mutex_lock(&priv->mutex);
331 ret = __iwl_up(priv);
332 mutex_unlock(&priv->mutex);
333 if (ret)
334 return ret;
335
336 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
337
338 /* Now we should be done, and the READY bit should be set. */
339 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
340 ret = -EIO;
341
342 iwlagn_led_enable(priv);
343
344 priv->is_open = 1;
345 IWL_DEBUG_MAC80211(priv, "leave\n");
346 return 0;
347 }
348
349 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
350 {
351 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
352
353 IWL_DEBUG_MAC80211(priv, "enter\n");
354
355 if (!priv->is_open)
356 return;
357
358 priv->is_open = 0;
359
360 mutex_lock(&priv->mutex);
361 iwl_down(priv);
362 mutex_unlock(&priv->mutex);
363
364 iwl_cancel_deferred_work(priv);
365
366 flush_workqueue(priv->workqueue);
367
368 /* User space software may expect getting rfkill changes
369 * even if interface is down, trans->down will leave the RF
370 * kill interrupt enabled
371 */
372 iwl_trans_stop_hw(priv->trans, false);
373
374 IWL_DEBUG_MAC80211(priv, "leave\n");
375 }
376
377 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
378 struct ieee80211_vif *vif,
379 struct cfg80211_gtk_rekey_data *data)
380 {
381 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
382
383 if (iwlwifi_mod_params.sw_crypto)
384 return;
385
386 IWL_DEBUG_MAC80211(priv, "enter\n");
387 mutex_lock(&priv->mutex);
388
389 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
390 goto out;
391
392 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
393 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
394 priv->replay_ctr =
395 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
396 priv->have_rekey_data = true;
397
398 out:
399 mutex_unlock(&priv->mutex);
400 IWL_DEBUG_MAC80211(priv, "leave\n");
401 }
402
403 #ifdef CONFIG_PM_SLEEP
404
405 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
406 struct cfg80211_wowlan *wowlan)
407 {
408 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
409 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
410 int ret;
411
412 if (WARN_ON(!wowlan))
413 return -EINVAL;
414
415 IWL_DEBUG_MAC80211(priv, "enter\n");
416 mutex_lock(&priv->mutex);
417
418 /* Don't attempt WoWLAN when not associated, tear down instead. */
419 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
420 !iwl_is_associated_ctx(ctx)) {
421 ret = 1;
422 goto out;
423 }
424
425 ret = iwlagn_suspend(priv, wowlan);
426 if (ret)
427 goto error;
428
429 iwl_trans_wowlan_suspend(priv->trans);
430
431 goto out;
432
433 error:
434 priv->wowlan = false;
435 iwlagn_prepare_restart(priv);
436 ieee80211_restart_hw(priv->hw);
437 out:
438 mutex_unlock(&priv->mutex);
439 IWL_DEBUG_MAC80211(priv, "leave\n");
440
441 return ret;
442 }
443
444 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
445 {
446 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
447 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
448 struct ieee80211_vif *vif;
449 unsigned long flags;
450 u32 base, status = 0xffffffff;
451 int ret = -EIO;
452
453 IWL_DEBUG_MAC80211(priv, "enter\n");
454 mutex_lock(&priv->mutex);
455
456 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
457 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
458
459 base = priv->device_pointers.error_event_table;
460 if (iwlagn_hw_valid_rtc_data_addr(base)) {
461 spin_lock_irqsave(&priv->trans->reg_lock, flags);
462 ret = iwl_grab_nic_access_silent(priv->trans);
463 if (likely(ret == 0)) {
464 iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
465 status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
466 iwl_release_nic_access(priv->trans);
467 }
468 spin_unlock_irqrestore(&priv->trans->reg_lock, flags);
469
470 #ifdef CONFIG_IWLWIFI_DEBUGFS
471 if (ret == 0) {
472 const struct fw_img *img;
473
474 img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
475 if (!priv->wowlan_sram) {
476 priv->wowlan_sram =
477 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
478 GFP_KERNEL);
479 }
480
481 if (priv->wowlan_sram)
482 _iwl_read_targ_mem_dwords(
483 priv->trans, 0x800000,
484 priv->wowlan_sram,
485 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
486 }
487 #endif
488 }
489
490 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
491 vif = ctx->vif;
492
493 priv->wowlan = false;
494
495 iwlagn_prepare_restart(priv);
496
497 memset((void *)&ctx->active, 0, sizeof(ctx->active));
498 iwl_connection_init_rx_config(priv, ctx);
499 iwlagn_set_rxon_chain(priv, ctx);
500
501 mutex_unlock(&priv->mutex);
502 IWL_DEBUG_MAC80211(priv, "leave\n");
503
504 ieee80211_resume_disconnect(vif);
505
506 return 1;
507 }
508
509 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
510 {
511 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
512
513 device_set_wakeup_enable(priv->trans->dev, enabled);
514 }
515 #endif
516
517 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
518 struct ieee80211_tx_control *control,
519 struct sk_buff *skb)
520 {
521 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
522
523 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
524 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
525
526 if (iwlagn_tx_skb(priv, control->sta, skb))
527 ieee80211_free_txskb(hw, skb);
528 }
529
530 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
531 struct ieee80211_vif *vif,
532 struct ieee80211_key_conf *keyconf,
533 struct ieee80211_sta *sta,
534 u32 iv32, u16 *phase1key)
535 {
536 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
537
538 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
539 }
540
541 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
542 struct ieee80211_vif *vif,
543 struct ieee80211_sta *sta,
544 struct ieee80211_key_conf *key)
545 {
546 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
547 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
548 struct iwl_rxon_context *ctx = vif_priv->ctx;
549 int ret;
550 bool is_default_wep_key = false;
551
552 IWL_DEBUG_MAC80211(priv, "enter\n");
553
554 if (iwlwifi_mod_params.sw_crypto) {
555 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
556 return -EOPNOTSUPP;
557 }
558
559 switch (key->cipher) {
560 case WLAN_CIPHER_SUITE_TKIP:
561 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
562 /* fall through */
563 case WLAN_CIPHER_SUITE_CCMP:
564 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
565 break;
566 default:
567 break;
568 }
569
570 /*
571 * We could program these keys into the hardware as well, but we
572 * don't expect much multicast traffic in IBSS and having keys
573 * for more stations is probably more useful.
574 *
575 * Mark key TX-only and return 0.
576 */
577 if (vif->type == NL80211_IFTYPE_ADHOC &&
578 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
579 key->hw_key_idx = WEP_INVALID_OFFSET;
580 return 0;
581 }
582
583 /* If they key was TX-only, accept deletion */
584 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
585 return 0;
586
587 mutex_lock(&priv->mutex);
588 iwl_scan_cancel_timeout(priv, 100);
589
590 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
591
592 /*
593 * If we are getting WEP group key and we didn't receive any key mapping
594 * so far, we are in legacy wep mode (group key only), otherwise we are
595 * in 1X mode.
596 * In legacy wep mode, we use another host command to the uCode.
597 */
598 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
599 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
600 if (cmd == SET_KEY)
601 is_default_wep_key = !ctx->key_mapping_keys;
602 else
603 is_default_wep_key =
604 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
605 }
606
607
608 switch (cmd) {
609 case SET_KEY:
610 if (is_default_wep_key) {
611 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
612 break;
613 }
614 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
615 if (ret) {
616 /*
617 * can't add key for RX, but we don't need it
618 * in the device for TX so still return 0
619 */
620 ret = 0;
621 key->hw_key_idx = WEP_INVALID_OFFSET;
622 }
623
624 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
625 break;
626 case DISABLE_KEY:
627 if (is_default_wep_key)
628 ret = iwl_remove_default_wep_key(priv, ctx, key);
629 else
630 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
631
632 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
633 break;
634 default:
635 ret = -EINVAL;
636 }
637
638 mutex_unlock(&priv->mutex);
639 IWL_DEBUG_MAC80211(priv, "leave\n");
640
641 return ret;
642 }
643
644 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
645 struct ieee80211_vif *vif,
646 enum ieee80211_ampdu_mlme_action action,
647 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
648 u8 buf_size)
649 {
650 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
651 int ret = -EINVAL;
652 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
653
654 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
655 sta->addr, tid);
656
657 if (!(priv->nvm_data->sku_cap_11n_enable))
658 return -EACCES;
659
660 IWL_DEBUG_MAC80211(priv, "enter\n");
661 mutex_lock(&priv->mutex);
662
663 switch (action) {
664 case IEEE80211_AMPDU_RX_START:
665 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
666 break;
667 IWL_DEBUG_HT(priv, "start Rx\n");
668 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
669 break;
670 case IEEE80211_AMPDU_RX_STOP:
671 IWL_DEBUG_HT(priv, "stop Rx\n");
672 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
673 break;
674 case IEEE80211_AMPDU_TX_START:
675 if (!priv->trans->ops->txq_enable)
676 break;
677 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
678 break;
679 IWL_DEBUG_HT(priv, "start Tx\n");
680 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
681 break;
682 case IEEE80211_AMPDU_TX_STOP:
683 IWL_DEBUG_HT(priv, "stop Tx\n");
684 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
685 if ((ret == 0) && (priv->agg_tids_count > 0)) {
686 priv->agg_tids_count--;
687 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
688 priv->agg_tids_count);
689 }
690 if (!priv->agg_tids_count &&
691 priv->hw_params.use_rts_for_aggregation) {
692 /*
693 * switch off RTS/CTS if it was previously enabled
694 */
695 sta_priv->lq_sta.lq.general_params.flags &=
696 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
697 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
698 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
699 }
700 break;
701 case IEEE80211_AMPDU_TX_OPERATIONAL:
702 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
703 break;
704 }
705 mutex_unlock(&priv->mutex);
706 IWL_DEBUG_MAC80211(priv, "leave\n");
707 return ret;
708 }
709
710 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
711 struct ieee80211_vif *vif,
712 struct ieee80211_sta *sta)
713 {
714 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
715 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
716 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
717 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
718 int ret;
719 u8 sta_id;
720
721 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
722 sta->addr);
723 sta_priv->sta_id = IWL_INVALID_STATION;
724
725 atomic_set(&sta_priv->pending_frames, 0);
726 if (vif->type == NL80211_IFTYPE_AP)
727 sta_priv->client = true;
728
729 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
730 is_ap, sta, &sta_id);
731 if (ret) {
732 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
733 sta->addr, ret);
734 /* Should we return success if return code is EEXIST ? */
735 return ret;
736 }
737
738 sta_priv->sta_id = sta_id;
739
740 return 0;
741 }
742
743 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
744 struct ieee80211_vif *vif,
745 struct ieee80211_sta *sta)
746 {
747 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
748 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
749 int ret;
750
751 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
752
753 if (vif->type == NL80211_IFTYPE_STATION) {
754 /*
755 * Station will be removed from device when the RXON
756 * is set to unassociated -- just deactivate it here
757 * to avoid re-programming it.
758 */
759 ret = 0;
760 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
761 } else {
762 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
763 if (ret)
764 IWL_DEBUG_QUIET_RFKILL(priv,
765 "Error removing station %pM\n", sta->addr);
766 }
767 return ret;
768 }
769
770 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
771 struct ieee80211_vif *vif,
772 struct ieee80211_sta *sta,
773 enum ieee80211_sta_state old_state,
774 enum ieee80211_sta_state new_state)
775 {
776 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
777 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
778 enum {
779 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
780 } op = NONE;
781 int ret;
782
783 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
784 sta->addr, old_state, new_state);
785
786 mutex_lock(&priv->mutex);
787 if (vif->type == NL80211_IFTYPE_STATION) {
788 if (old_state == IEEE80211_STA_NOTEXIST &&
789 new_state == IEEE80211_STA_NONE)
790 op = ADD;
791 else if (old_state == IEEE80211_STA_NONE &&
792 new_state == IEEE80211_STA_NOTEXIST)
793 op = REMOVE;
794 else if (old_state == IEEE80211_STA_AUTH &&
795 new_state == IEEE80211_STA_ASSOC)
796 op = HT_RATE_INIT;
797 } else {
798 if (old_state == IEEE80211_STA_AUTH &&
799 new_state == IEEE80211_STA_ASSOC)
800 op = ADD_RATE_INIT;
801 else if (old_state == IEEE80211_STA_ASSOC &&
802 new_state == IEEE80211_STA_AUTH)
803 op = REMOVE;
804 }
805
806 switch (op) {
807 case ADD:
808 ret = iwlagn_mac_sta_add(hw, vif, sta);
809 if (ret)
810 break;
811 /*
812 * Clear the in-progress flag, the AP station entry was added
813 * but we'll initialize LQ only when we've associated (which
814 * would also clear the in-progress flag). This is necessary
815 * in case we never initialize LQ because association fails.
816 */
817 spin_lock_bh(&priv->sta_lock);
818 priv->stations[iwl_sta_id(sta)].used &=
819 ~IWL_STA_UCODE_INPROGRESS;
820 spin_unlock_bh(&priv->sta_lock);
821 break;
822 case REMOVE:
823 ret = iwlagn_mac_sta_remove(hw, vif, sta);
824 break;
825 case ADD_RATE_INIT:
826 ret = iwlagn_mac_sta_add(hw, vif, sta);
827 if (ret)
828 break;
829 /* Initialize rate scaling */
830 IWL_DEBUG_INFO(priv,
831 "Initializing rate scaling for station %pM\n",
832 sta->addr);
833 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
834 ret = 0;
835 break;
836 case HT_RATE_INIT:
837 /* Initialize rate scaling */
838 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
839 if (ret)
840 break;
841 IWL_DEBUG_INFO(priv,
842 "Initializing rate scaling for station %pM\n",
843 sta->addr);
844 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
845 ret = 0;
846 break;
847 default:
848 ret = 0;
849 break;
850 }
851
852 /*
853 * mac80211 might WARN if we fail, but due the way we
854 * (badly) handle hard rfkill, we might fail here
855 */
856 if (iwl_is_rfkill(priv))
857 ret = 0;
858
859 mutex_unlock(&priv->mutex);
860 IWL_DEBUG_MAC80211(priv, "leave\n");
861
862 return ret;
863 }
864
865 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
866 struct ieee80211_channel_switch *ch_switch)
867 {
868 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
869 struct ieee80211_conf *conf = &hw->conf;
870 struct ieee80211_channel *channel = ch_switch->channel;
871 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
872 /*
873 * MULTI-FIXME
874 * When we add support for multiple interfaces, we need to
875 * revisit this. The channel switch command in the device
876 * only affects the BSS context, but what does that really
877 * mean? And what if we get a CSA on the second interface?
878 * This needs a lot of work.
879 */
880 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
881 u16 ch;
882
883 IWL_DEBUG_MAC80211(priv, "enter\n");
884
885 mutex_lock(&priv->mutex);
886
887 if (iwl_is_rfkill(priv))
888 goto out;
889
890 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
891 test_bit(STATUS_SCANNING, &priv->status) ||
892 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
893 goto out;
894
895 if (!iwl_is_associated_ctx(ctx))
896 goto out;
897
898 if (!priv->lib->set_channel_switch)
899 goto out;
900
901 ch = channel->hw_value;
902 if (le16_to_cpu(ctx->active.channel) == ch)
903 goto out;
904
905 priv->current_ht_config.smps = conf->smps_mode;
906
907 /* Configure HT40 channels */
908 ctx->ht.enabled = conf_is_ht(conf);
909 if (ctx->ht.enabled)
910 iwlagn_config_ht40(conf, ctx);
911 else
912 ctx->ht.is_40mhz = false;
913
914 if ((le16_to_cpu(ctx->staging.channel) != ch))
915 ctx->staging.flags = 0;
916
917 iwl_set_rxon_channel(priv, channel, ctx);
918 iwl_set_rxon_ht(priv, ht_conf);
919 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
920
921 /*
922 * at this point, staging_rxon has the
923 * configuration for channel switch
924 */
925 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
926 priv->switch_channel = cpu_to_le16(ch);
927 if (priv->lib->set_channel_switch(priv, ch_switch)) {
928 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
929 priv->switch_channel = 0;
930 ieee80211_chswitch_done(ctx->vif, false);
931 }
932
933 out:
934 mutex_unlock(&priv->mutex);
935 IWL_DEBUG_MAC80211(priv, "leave\n");
936 }
937
938 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
939 {
940 /*
941 * MULTI-FIXME
942 * See iwlagn_mac_channel_switch.
943 */
944 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
945
946 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
947 return;
948
949 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
950 ieee80211_chswitch_done(ctx->vif, is_success);
951 }
952
953 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
954 unsigned int changed_flags,
955 unsigned int *total_flags,
956 u64 multicast)
957 {
958 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
959 __le32 filter_or = 0, filter_nand = 0;
960 struct iwl_rxon_context *ctx;
961
962 #define CHK(test, flag) do { \
963 if (*total_flags & (test)) \
964 filter_or |= (flag); \
965 else \
966 filter_nand |= (flag); \
967 } while (0)
968
969 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
970 changed_flags, *total_flags);
971
972 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
973 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
974 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
975 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
976
977 #undef CHK
978
979 mutex_lock(&priv->mutex);
980
981 for_each_context(priv, ctx) {
982 ctx->staging.filter_flags &= ~filter_nand;
983 ctx->staging.filter_flags |= filter_or;
984
985 /*
986 * Not committing directly because hardware can perform a scan,
987 * but we'll eventually commit the filter flags change anyway.
988 */
989 }
990
991 mutex_unlock(&priv->mutex);
992
993 /*
994 * Receiving all multicast frames is always enabled by the
995 * default flags setup in iwl_connection_init_rx_config()
996 * since we currently do not support programming multicast
997 * filters into the device.
998 */
999 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1000 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1001 }
1002
1003 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
1004 {
1005 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1006
1007 mutex_lock(&priv->mutex);
1008 IWL_DEBUG_MAC80211(priv, "enter\n");
1009
1010 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1011 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1012 goto done;
1013 }
1014 if (iwl_is_rfkill(priv)) {
1015 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1016 goto done;
1017 }
1018
1019 /*
1020 * mac80211 will not push any more frames for transmit
1021 * until the flush is completed
1022 */
1023 if (drop) {
1024 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1025 if (iwlagn_txfifo_flush(priv)) {
1026 IWL_ERR(priv, "flush request fail\n");
1027 goto done;
1028 }
1029 }
1030 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1031 iwl_trans_wait_tx_queue_empty(priv->trans);
1032 done:
1033 mutex_unlock(&priv->mutex);
1034 IWL_DEBUG_MAC80211(priv, "leave\n");
1035 }
1036
1037 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1038 struct ieee80211_vif *vif,
1039 struct ieee80211_channel *channel,
1040 int duration)
1041 {
1042 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1043 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1044 int err = 0;
1045
1046 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1047 return -EOPNOTSUPP;
1048
1049 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1050 return -EOPNOTSUPP;
1051
1052 IWL_DEBUG_MAC80211(priv, "enter\n");
1053 mutex_lock(&priv->mutex);
1054
1055 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1056 /* mac80211 should not scan while ROC or ROC while scanning */
1057 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1058 err = -EBUSY;
1059 goto out;
1060 }
1061
1062 iwl_scan_cancel_timeout(priv, 100);
1063
1064 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1065 err = -EBUSY;
1066 goto out;
1067 }
1068 }
1069
1070 priv->hw_roc_channel = channel;
1071 /* convert from ms to TU */
1072 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1073 priv->hw_roc_start_notified = false;
1074 cancel_delayed_work(&priv->hw_roc_disable_work);
1075
1076 if (!ctx->is_active) {
1077 static const struct iwl_qos_info default_qos_data = {
1078 .def_qos_parm = {
1079 .ac[0] = {
1080 .cw_min = cpu_to_le16(3),
1081 .cw_max = cpu_to_le16(7),
1082 .aifsn = 2,
1083 .edca_txop = cpu_to_le16(1504),
1084 },
1085 .ac[1] = {
1086 .cw_min = cpu_to_le16(7),
1087 .cw_max = cpu_to_le16(15),
1088 .aifsn = 2,
1089 .edca_txop = cpu_to_le16(3008),
1090 },
1091 .ac[2] = {
1092 .cw_min = cpu_to_le16(15),
1093 .cw_max = cpu_to_le16(1023),
1094 .aifsn = 3,
1095 },
1096 .ac[3] = {
1097 .cw_min = cpu_to_le16(15),
1098 .cw_max = cpu_to_le16(1023),
1099 .aifsn = 7,
1100 },
1101 },
1102 };
1103
1104 ctx->is_active = true;
1105 ctx->qos_data = default_qos_data;
1106 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1107 memcpy(ctx->staging.node_addr,
1108 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1109 ETH_ALEN);
1110 memcpy(ctx->staging.bssid_addr,
1111 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1112 ETH_ALEN);
1113 err = iwlagn_commit_rxon(priv, ctx);
1114 if (err)
1115 goto out;
1116 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1117 RXON_FILTER_PROMISC_MSK |
1118 RXON_FILTER_CTL2HOST_MSK;
1119
1120 err = iwlagn_commit_rxon(priv, ctx);
1121 if (err) {
1122 iwlagn_disable_roc(priv);
1123 goto out;
1124 }
1125 priv->hw_roc_setup = true;
1126 }
1127
1128 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1129 if (err)
1130 iwlagn_disable_roc(priv);
1131
1132 out:
1133 mutex_unlock(&priv->mutex);
1134 IWL_DEBUG_MAC80211(priv, "leave\n");
1135
1136 return err;
1137 }
1138
1139 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1140 {
1141 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1142
1143 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1144 return -EOPNOTSUPP;
1145
1146 IWL_DEBUG_MAC80211(priv, "enter\n");
1147 mutex_lock(&priv->mutex);
1148 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1149 iwlagn_disable_roc(priv);
1150 mutex_unlock(&priv->mutex);
1151 IWL_DEBUG_MAC80211(priv, "leave\n");
1152
1153 return 0;
1154 }
1155
1156 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1157 enum ieee80211_rssi_event rssi_event)
1158 {
1159 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1160
1161 IWL_DEBUG_MAC80211(priv, "enter\n");
1162 mutex_lock(&priv->mutex);
1163
1164 if (priv->cfg->bt_params &&
1165 priv->cfg->bt_params->advanced_bt_coexist) {
1166 if (rssi_event == RSSI_EVENT_LOW)
1167 priv->bt_enable_pspoll = true;
1168 else if (rssi_event == RSSI_EVENT_HIGH)
1169 priv->bt_enable_pspoll = false;
1170
1171 iwlagn_send_advance_bt_config(priv);
1172 } else {
1173 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1174 "ignoring RSSI callback\n");
1175 }
1176
1177 mutex_unlock(&priv->mutex);
1178 IWL_DEBUG_MAC80211(priv, "leave\n");
1179 }
1180
1181 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1182 struct ieee80211_sta *sta, bool set)
1183 {
1184 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1185
1186 queue_work(priv->workqueue, &priv->beacon_update);
1187
1188 return 0;
1189 }
1190
1191 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1192 struct ieee80211_vif *vif, u16 queue,
1193 const struct ieee80211_tx_queue_params *params)
1194 {
1195 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1196 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1197 struct iwl_rxon_context *ctx = vif_priv->ctx;
1198 int q;
1199
1200 if (WARN_ON(!ctx))
1201 return -EINVAL;
1202
1203 IWL_DEBUG_MAC80211(priv, "enter\n");
1204
1205 if (!iwl_is_ready_rf(priv)) {
1206 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1207 return -EIO;
1208 }
1209
1210 if (queue >= AC_NUM) {
1211 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1212 return 0;
1213 }
1214
1215 q = AC_NUM - 1 - queue;
1216
1217 mutex_lock(&priv->mutex);
1218
1219 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1220 cpu_to_le16(params->cw_min);
1221 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1222 cpu_to_le16(params->cw_max);
1223 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1224 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1225 cpu_to_le16((params->txop * 32));
1226
1227 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1228
1229 mutex_unlock(&priv->mutex);
1230
1231 IWL_DEBUG_MAC80211(priv, "leave\n");
1232 return 0;
1233 }
1234
1235 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1236 {
1237 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1238
1239 return priv->ibss_manager == IWL_IBSS_MANAGER;
1240 }
1241
1242 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1243 {
1244 iwl_connection_init_rx_config(priv, ctx);
1245
1246 iwlagn_set_rxon_chain(priv, ctx);
1247
1248 return iwlagn_commit_rxon(priv, ctx);
1249 }
1250
1251 static int iwl_setup_interface(struct iwl_priv *priv,
1252 struct iwl_rxon_context *ctx)
1253 {
1254 struct ieee80211_vif *vif = ctx->vif;
1255 int err, ac;
1256
1257 lockdep_assert_held(&priv->mutex);
1258
1259 /*
1260 * This variable will be correct only when there's just
1261 * a single context, but all code using it is for hardware
1262 * that supports only one context.
1263 */
1264 priv->iw_mode = vif->type;
1265
1266 ctx->is_active = true;
1267
1268 err = iwl_set_mode(priv, ctx);
1269 if (err) {
1270 if (!ctx->always_active)
1271 ctx->is_active = false;
1272 return err;
1273 }
1274
1275 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1276 vif->type == NL80211_IFTYPE_ADHOC) {
1277 /*
1278 * pretend to have high BT traffic as long as we
1279 * are operating in IBSS mode, as this will cause
1280 * the rate scaling etc. to behave as intended.
1281 */
1282 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1283 }
1284
1285 /* set up queue mappings */
1286 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1287 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1288
1289 if (vif->type == NL80211_IFTYPE_AP)
1290 vif->cab_queue = ctx->mcast_queue;
1291 else
1292 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1293
1294 return 0;
1295 }
1296
1297 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1298 struct ieee80211_vif *vif)
1299 {
1300 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1301 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1302 struct iwl_rxon_context *tmp, *ctx = NULL;
1303 int err;
1304 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1305 bool reset = false;
1306
1307 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1308 viftype, vif->addr);
1309
1310 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1311
1312 mutex_lock(&priv->mutex);
1313
1314 iwlagn_disable_roc(priv);
1315
1316 if (!iwl_is_ready_rf(priv)) {
1317 IWL_WARN(priv, "Try to add interface when device not ready\n");
1318 err = -EINVAL;
1319 goto out;
1320 }
1321
1322 for_each_context(priv, tmp) {
1323 u32 possible_modes =
1324 tmp->interface_modes | tmp->exclusive_interface_modes;
1325
1326 if (tmp->vif) {
1327 /* On reset we need to add the same interface again */
1328 if (tmp->vif == vif) {
1329 reset = true;
1330 ctx = tmp;
1331 break;
1332 }
1333
1334 /* check if this busy context is exclusive */
1335 if (tmp->exclusive_interface_modes &
1336 BIT(tmp->vif->type)) {
1337 err = -EINVAL;
1338 goto out;
1339 }
1340 continue;
1341 }
1342
1343 if (!(possible_modes & BIT(viftype)))
1344 continue;
1345
1346 /* have maybe usable context w/o interface */
1347 ctx = tmp;
1348 break;
1349 }
1350
1351 if (!ctx) {
1352 err = -EOPNOTSUPP;
1353 goto out;
1354 }
1355
1356 vif_priv->ctx = ctx;
1357 ctx->vif = vif;
1358
1359 /*
1360 * In SNIFFER device type, the firmware reports the FCS to
1361 * the host, rather than snipping it off. Unfortunately,
1362 * mac80211 doesn't (yet) provide a per-packet flag for
1363 * this, so that we have to set the hardware flag based
1364 * on the interfaces added. As the monitor interface can
1365 * only be present by itself, and will be removed before
1366 * other interfaces are added, this is safe.
1367 */
1368 if (vif->type == NL80211_IFTYPE_MONITOR)
1369 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1370 else
1371 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1372
1373 err = iwl_setup_interface(priv, ctx);
1374 if (!err || reset)
1375 goto out;
1376
1377 ctx->vif = NULL;
1378 priv->iw_mode = NL80211_IFTYPE_STATION;
1379 out:
1380 mutex_unlock(&priv->mutex);
1381
1382 IWL_DEBUG_MAC80211(priv, "leave\n");
1383 return err;
1384 }
1385
1386 static void iwl_teardown_interface(struct iwl_priv *priv,
1387 struct ieee80211_vif *vif,
1388 bool mode_change)
1389 {
1390 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1391
1392 lockdep_assert_held(&priv->mutex);
1393
1394 if (priv->scan_vif == vif) {
1395 iwl_scan_cancel_timeout(priv, 200);
1396 iwl_force_scan_end(priv);
1397 }
1398
1399 if (!mode_change) {
1400 iwl_set_mode(priv, ctx);
1401 if (!ctx->always_active)
1402 ctx->is_active = false;
1403 }
1404
1405 /*
1406 * When removing the IBSS interface, overwrite the
1407 * BT traffic load with the stored one from the last
1408 * notification, if any. If this is a device that
1409 * doesn't implement this, this has no effect since
1410 * both values are the same and zero.
1411 */
1412 if (vif->type == NL80211_IFTYPE_ADHOC)
1413 priv->bt_traffic_load = priv->last_bt_traffic_load;
1414 }
1415
1416 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1417 struct ieee80211_vif *vif)
1418 {
1419 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1420 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1421
1422 IWL_DEBUG_MAC80211(priv, "enter\n");
1423
1424 mutex_lock(&priv->mutex);
1425
1426 if (WARN_ON(ctx->vif != vif)) {
1427 struct iwl_rxon_context *tmp;
1428 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1429 for_each_context(priv, tmp)
1430 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1431 tmp->ctxid, tmp, tmp->vif);
1432 }
1433 ctx->vif = NULL;
1434
1435 iwl_teardown_interface(priv, vif, false);
1436
1437 mutex_unlock(&priv->mutex);
1438
1439 IWL_DEBUG_MAC80211(priv, "leave\n");
1440
1441 }
1442
1443 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1444 struct ieee80211_vif *vif,
1445 enum nl80211_iftype newtype, bool newp2p)
1446 {
1447 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1448 struct iwl_rxon_context *ctx, *tmp;
1449 enum nl80211_iftype newviftype = newtype;
1450 u32 interface_modes;
1451 int err;
1452
1453 IWL_DEBUG_MAC80211(priv, "enter\n");
1454
1455 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1456
1457 mutex_lock(&priv->mutex);
1458
1459 ctx = iwl_rxon_ctx_from_vif(vif);
1460
1461 /*
1462 * To simplify this code, only support changes on the
1463 * BSS context. The PAN context is usually reassigned
1464 * by creating/removing P2P interfaces anyway.
1465 */
1466 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1467 err = -EBUSY;
1468 goto out;
1469 }
1470
1471 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1472 /*
1473 * Huh? But wait ... this can maybe happen when
1474 * we're in the middle of a firmware restart!
1475 */
1476 err = -EBUSY;
1477 goto out;
1478 }
1479
1480 /* Check if the switch is supported in the same context */
1481 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1482 if (!(interface_modes & BIT(newtype))) {
1483 err = -EBUSY;
1484 goto out;
1485 }
1486
1487 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1488 for_each_context(priv, tmp) {
1489 if (ctx == tmp)
1490 continue;
1491
1492 if (!tmp->is_active)
1493 continue;
1494
1495 /*
1496 * The current mode switch would be exclusive, but
1497 * another context is active ... refuse the switch.
1498 */
1499 err = -EBUSY;
1500 goto out;
1501 }
1502 }
1503
1504 /* success */
1505 iwl_teardown_interface(priv, vif, true);
1506 vif->type = newviftype;
1507 vif->p2p = newp2p;
1508 err = iwl_setup_interface(priv, ctx);
1509 WARN_ON(err);
1510 /*
1511 * We've switched internally, but submitting to the
1512 * device may have failed for some reason. Mask this
1513 * error, because otherwise mac80211 will not switch
1514 * (and set the interface type back) and we'll be
1515 * out of sync with it.
1516 */
1517 err = 0;
1518
1519 out:
1520 mutex_unlock(&priv->mutex);
1521 IWL_DEBUG_MAC80211(priv, "leave\n");
1522
1523 return err;
1524 }
1525
1526 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1527 struct ieee80211_vif *vif,
1528 struct cfg80211_scan_request *req)
1529 {
1530 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1531 int ret;
1532
1533 IWL_DEBUG_MAC80211(priv, "enter\n");
1534
1535 if (req->n_channels == 0)
1536 return -EINVAL;
1537
1538 mutex_lock(&priv->mutex);
1539
1540 /*
1541 * If an internal scan is in progress, just set
1542 * up the scan_request as per above.
1543 */
1544 if (priv->scan_type != IWL_SCAN_NORMAL) {
1545 IWL_DEBUG_SCAN(priv,
1546 "SCAN request during internal scan - defer\n");
1547 priv->scan_request = req;
1548 priv->scan_vif = vif;
1549 ret = 0;
1550 } else {
1551 priv->scan_request = req;
1552 priv->scan_vif = vif;
1553 /*
1554 * mac80211 will only ask for one band at a time
1555 * so using channels[0] here is ok
1556 */
1557 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1558 req->channels[0]->band);
1559 if (ret) {
1560 priv->scan_request = NULL;
1561 priv->scan_vif = NULL;
1562 }
1563 }
1564
1565 IWL_DEBUG_MAC80211(priv, "leave\n");
1566
1567 mutex_unlock(&priv->mutex);
1568
1569 return ret;
1570 }
1571
1572 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1573 {
1574 struct iwl_addsta_cmd cmd = {
1575 .mode = STA_CONTROL_MODIFY_MSK,
1576 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1577 .sta.sta_id = sta_id,
1578 };
1579
1580 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1581 }
1582
1583 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1584 struct ieee80211_vif *vif,
1585 enum sta_notify_cmd cmd,
1586 struct ieee80211_sta *sta)
1587 {
1588 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1589 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1590 int sta_id;
1591
1592 IWL_DEBUG_MAC80211(priv, "enter\n");
1593
1594 switch (cmd) {
1595 case STA_NOTIFY_SLEEP:
1596 WARN_ON(!sta_priv->client);
1597 sta_priv->asleep = true;
1598 if (atomic_read(&sta_priv->pending_frames) > 0)
1599 ieee80211_sta_block_awake(hw, sta, true);
1600 break;
1601 case STA_NOTIFY_AWAKE:
1602 WARN_ON(!sta_priv->client);
1603 if (!sta_priv->asleep)
1604 break;
1605 sta_priv->asleep = false;
1606 sta_id = iwl_sta_id(sta);
1607 if (sta_id != IWL_INVALID_STATION)
1608 iwl_sta_modify_ps_wake(priv, sta_id);
1609 break;
1610 default:
1611 break;
1612 }
1613 IWL_DEBUG_MAC80211(priv, "leave\n");
1614 }
1615
1616 struct ieee80211_ops iwlagn_hw_ops = {
1617 .tx = iwlagn_mac_tx,
1618 .start = iwlagn_mac_start,
1619 .stop = iwlagn_mac_stop,
1620 #ifdef CONFIG_PM_SLEEP
1621 .suspend = iwlagn_mac_suspend,
1622 .resume = iwlagn_mac_resume,
1623 .set_wakeup = iwlagn_mac_set_wakeup,
1624 #endif
1625 .add_interface = iwlagn_mac_add_interface,
1626 .remove_interface = iwlagn_mac_remove_interface,
1627 .change_interface = iwlagn_mac_change_interface,
1628 .config = iwlagn_mac_config,
1629 .configure_filter = iwlagn_configure_filter,
1630 .set_key = iwlagn_mac_set_key,
1631 .update_tkip_key = iwlagn_mac_update_tkip_key,
1632 .set_rekey_data = iwlagn_mac_set_rekey_data,
1633 .conf_tx = iwlagn_mac_conf_tx,
1634 .bss_info_changed = iwlagn_bss_info_changed,
1635 .ampdu_action = iwlagn_mac_ampdu_action,
1636 .hw_scan = iwlagn_mac_hw_scan,
1637 .sta_notify = iwlagn_mac_sta_notify,
1638 .sta_state = iwlagn_mac_sta_state,
1639 .channel_switch = iwlagn_mac_channel_switch,
1640 .flush = iwlagn_mac_flush,
1641 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1642 .remain_on_channel = iwlagn_mac_remain_on_channel,
1643 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1644 .rssi_callback = iwlagn_mac_rssi_callback,
1645 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1646 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1647 .set_tim = iwlagn_mac_set_tim,
1648 };
1649
1650 /* This function both allocates and initializes hw and priv. */
1651 struct ieee80211_hw *iwl_alloc_all(void)
1652 {
1653 struct iwl_priv *priv;
1654 struct iwl_op_mode *op_mode;
1655 /* mac80211 allocates memory for this device instance, including
1656 * space for this driver's private structure */
1657 struct ieee80211_hw *hw;
1658
1659 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1660 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1661 if (!hw)
1662 goto out;
1663
1664 op_mode = hw->priv;
1665 priv = IWL_OP_MODE_GET_DVM(op_mode);
1666 priv->hw = hw;
1667
1668 out:
1669 return hw;
1670 }
Linux kernel - Deliverables
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