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module: Convert symbol namespace to string literal
[linux.git] / drivers / net / wireless / intel / iwlwifi / dvm / mac80211.c
blob74d163e5651189827a67ebf7cfc9d24d94e5072c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3 *
4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
5 * Copyright(C) 2018 - 2019, 2022 - 2024 Intel Corporation
6 *
7 * Portions of this file are derived from the ipw3945 project, as well
8 * as portions of the ieee80211 subsystem header files.
9 *****************************************************************************/
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/delay.h>
15 #include <linux/sched.h>
16 #include <linux/skbuff.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20
21 #include <net/ieee80211_radiotap.h>
22 #include <net/mac80211.h>
23
24 #include <asm/div64.h>
25
26 #include "iwl-io.h"
27 #include "iwl-trans.h"
28 #include "iwl-op-mode.h"
29 #include "iwl-modparams.h"
30
31 #include "dev.h"
32 #include "calib.h"
33 #include "agn.h"
34
35 /*****************************************************************************
36 *
37 * mac80211 entry point functions
38 *
39 *****************************************************************************/
40
41 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
42 {
43 .max = 1,
44 .types = BIT(NL80211_IFTYPE_STATION),
45 },
46 {
47 .max = 1,
48 .types = BIT(NL80211_IFTYPE_AP),
49 },
50 };
51
52 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
53 {
54 .max = 2,
55 .types = BIT(NL80211_IFTYPE_STATION),
56 },
57 };
58
59 static const struct ieee80211_iface_combination
60 iwlagn_iface_combinations_dualmode[] = {
61 { .num_different_channels = 1,
62 .max_interfaces = 2,
63 .beacon_int_infra_match = true,
64 .limits = iwlagn_sta_ap_limits,
65 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
66 },
67 { .num_different_channels = 1,
68 .max_interfaces = 2,
69 .limits = iwlagn_2sta_limits,
70 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
71 },
72 };
73
74 /*
75 * Not a mac80211 entry point function, but it fits in with all the
76 * other mac80211 functions grouped here.
77 */
78 int iwlagn_mac_setup_register(struct iwl_priv *priv,
79 const struct iwl_ucode_capabilities *capa)
80 {
81 int ret;
82 struct ieee80211_hw *hw = priv->hw;
83 struct iwl_rxon_context *ctx;
84
85 hw->rate_control_algorithm = "iwl-agn-rs";
86
87 /* Tell mac80211 our characteristics */
88 ieee80211_hw_set(hw, SIGNAL_DBM);
89 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
90 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
91 ieee80211_hw_set(hw, SPECTRUM_MGMT);
92 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
93 ieee80211_hw_set(hw, QUEUE_CONTROL);
94 ieee80211_hw_set(hw, SUPPORTS_PS);
95 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
96 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
97 ieee80211_hw_set(hw, WANT_MONITOR_VIF);
98
99 if (priv->trans->max_skb_frags)
100 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
101
102 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
103 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
104
105 /*
106 * Including the following line will crash some AP's. This
107 * workaround removes the stimulus which causes the crash until
108 * the AP software can be fixed.
109 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
110 */
111
112 if (priv->nvm_data->sku_cap_11n_enable)
113 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
114 NL80211_FEATURE_STATIC_SMPS;
115
116 /*
117 * Enable 11w if advertised by firmware and software crypto
118 * is not enabled (as the firmware will interpret some mgmt
119 * packets, so enabling it with software crypto isn't safe)
120 */
121 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
122 !iwlwifi_mod_params.swcrypto)
123 ieee80211_hw_set(hw, MFP_CAPABLE);
124
125 hw->sta_data_size = sizeof(struct iwl_station_priv);
126 hw->vif_data_size = sizeof(struct iwl_vif_priv);
127
128 for_each_context(priv, ctx) {
129 hw->wiphy->interface_modes |= ctx->interface_modes;
130 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
131 }
132
133 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
134
135 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
136 hw->wiphy->iface_combinations =
137 iwlagn_iface_combinations_dualmode;
138 hw->wiphy->n_iface_combinations =
139 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
140 }
141
142 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
143 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
144 REGULATORY_DISABLE_BEACON_HINTS;
145
146 #ifdef CONFIG_PM_SLEEP
147 if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec &&
148 device_can_wakeup(priv->trans->dev)) {
149 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
150 WIPHY_WOWLAN_DISCONNECT |
151 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
152 WIPHY_WOWLAN_RFKILL_RELEASE;
153 if (!iwlwifi_mod_params.swcrypto)
154 priv->wowlan_support.flags |=
155 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
156 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
157
158 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
159 priv->wowlan_support.pattern_min_len =
160 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
161 priv->wowlan_support.pattern_max_len =
162 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
163 hw->wiphy->wowlan = &priv->wowlan_support;
164 }
165 #endif
166
167 if (iwlwifi_mod_params.power_save)
168 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
169 else
170 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
171
172 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
173 /* we create the 802.11 header and a max-length SSID element */
174 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
175
176 /*
177 * We don't use all queues: 4 and 9 are unused and any
178 * aggregation queue gets mapped down to the AC queue.
179 */
180 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
181
182 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
183
184 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
185 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
186 &priv->nvm_data->bands[NL80211_BAND_2GHZ];
187 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
188 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
189 &priv->nvm_data->bands[NL80211_BAND_5GHZ];
190
191 hw->wiphy->hw_version = priv->trans->hw_id;
192
193 iwl_leds_init(priv);
194
195 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
196 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_EXT_KEY_ID);
197
198 ret = ieee80211_register_hw(priv->hw);
199 if (ret) {
200 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
201 iwl_leds_exit(priv);
202 return ret;
203 }
204 priv->mac80211_registered = 1;
205
206 return 0;
207 }
208
209 void iwlagn_mac_unregister(struct iwl_priv *priv)
210 {
211 if (!priv->mac80211_registered)
212 return;
213 iwl_leds_exit(priv);
214 ieee80211_unregister_hw(priv->hw);
215 priv->mac80211_registered = 0;
216 }
217
218 static int __iwl_up(struct iwl_priv *priv)
219 {
220 struct iwl_rxon_context *ctx;
221 int ret;
222
223 lockdep_assert_held(&priv->mutex);
224
225 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
226 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
227 return -EIO;
228 }
229
230 for_each_context(priv, ctx) {
231 ret = iwlagn_alloc_bcast_station(priv, ctx);
232 if (ret) {
233 iwl_dealloc_bcast_stations(priv);
234 return ret;
235 }
236 }
237
238 ret = iwl_trans_start_hw(priv->trans);
239 if (ret) {
240 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
241 goto error;
242 }
243
244 ret = iwl_run_init_ucode(priv);
245 if (ret) {
246 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
247 goto error;
248 }
249
250 ret = iwl_trans_start_hw(priv->trans);
251 if (ret) {
252 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
253 goto error;
254 }
255
256 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
257 if (ret) {
258 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
259 goto error;
260 }
261
262 ret = iwl_alive_start(priv);
263 if (ret)
264 goto error;
265 return 0;
266
267 error:
268 set_bit(STATUS_EXIT_PENDING, &priv->status);
269 iwl_down(priv);
270 clear_bit(STATUS_EXIT_PENDING, &priv->status);
271
272 IWL_ERR(priv, "Unable to initialize device.\n");
273 return ret;
274 }
275
276 static int iwlagn_mac_start(struct ieee80211_hw *hw)
277 {
278 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
279 int ret;
280
281 IWL_DEBUG_MAC80211(priv, "enter\n");
282
283 /* we should be verifying the device is ready to be opened */
284 mutex_lock(&priv->mutex);
285 ret = __iwl_up(priv);
286 mutex_unlock(&priv->mutex);
287 if (ret)
288 return ret;
289
290 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
291
292 /* Now we should be done, and the READY bit should be set. */
293 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
294 ret = -EIO;
295
296 iwlagn_led_enable(priv);
297
298 priv->is_open = 1;
299 IWL_DEBUG_MAC80211(priv, "leave\n");
300 return ret;
301 }
302
303 static void iwlagn_mac_stop(struct ieee80211_hw *hw, bool suspend)
304 {
305 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
306
307 IWL_DEBUG_MAC80211(priv, "enter\n");
308
309 if (!priv->is_open)
310 return;
311
312 priv->is_open = 0;
313
314 mutex_lock(&priv->mutex);
315 iwl_down(priv);
316 mutex_unlock(&priv->mutex);
317
318 iwl_cancel_deferred_work(priv);
319
320 flush_workqueue(priv->workqueue);
321
322 IWL_DEBUG_MAC80211(priv, "leave\n");
323 }
324
325 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
326 struct ieee80211_vif *vif,
327 struct cfg80211_gtk_rekey_data *data)
328 {
329 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
330
331 if (iwlwifi_mod_params.swcrypto)
332 return;
333
334 IWL_DEBUG_MAC80211(priv, "enter\n");
335 mutex_lock(&priv->mutex);
336
337 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
338 goto out;
339
340 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
341 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
342 priv->replay_ctr =
343 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
344 priv->have_rekey_data = true;
345
346 out:
347 mutex_unlock(&priv->mutex);
348 IWL_DEBUG_MAC80211(priv, "leave\n");
349 }
350
351 #ifdef CONFIG_PM_SLEEP
352
353 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
354 struct cfg80211_wowlan *wowlan)
355 {
356 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
357 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
358 int ret;
359
360 if (WARN_ON(!wowlan))
361 return -EINVAL;
362
363 IWL_DEBUG_MAC80211(priv, "enter\n");
364 mutex_lock(&priv->mutex);
365
366 /* Don't attempt WoWLAN when not associated, tear down instead. */
367 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
368 !iwl_is_associated_ctx(ctx)) {
369 ret = 1;
370 goto out;
371 }
372
373 ret = iwlagn_suspend(priv, wowlan);
374 if (ret)
375 goto error;
376
377 /* let the ucode operate on its own */
378 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
379 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
380
381 iwl_trans_d3_suspend(priv->trans, false, true);
382
383 goto out;
384
385 error:
386 priv->wowlan = false;
387 iwlagn_prepare_restart(priv);
388 ieee80211_restart_hw(priv->hw);
389 out:
390 mutex_unlock(&priv->mutex);
391 IWL_DEBUG_MAC80211(priv, "leave\n");
392
393 return ret;
394 }
395
396 struct iwl_resume_data {
397 struct iwl_priv *priv;
398 struct iwlagn_wowlan_status *cmd;
399 bool valid;
400 };
401
402 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
403 struct iwl_rx_packet *pkt, void *data)
404 {
405 struct iwl_resume_data *resume_data = data;
406 struct iwl_priv *priv = resume_data->priv;
407
408 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
409 IWL_ERR(priv, "rx wrong size data\n");
410 return true;
411 }
412 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
413 resume_data->valid = true;
414
415 return true;
416 }
417
418 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
419 {
420 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
421 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
422 struct ieee80211_vif *vif;
423 u32 base;
424 int ret;
425 enum iwl_d3_status d3_status;
426 struct error_table_start {
427 /* cf. struct iwl_error_event_table */
428 u32 valid;
429 u32 error_id;
430 } err_info;
431 struct iwl_notification_wait status_wait;
432 static const u16 status_cmd[] = {
433 REPLY_WOWLAN_GET_STATUS,
434 };
435 struct iwlagn_wowlan_status status_data = {};
436 struct iwl_resume_data resume_data = {
437 .priv = priv,
438 .cmd = &status_data,
439 .valid = false,
440 };
441 struct cfg80211_wowlan_wakeup wakeup = {
442 .pattern_idx = -1,
443 };
444 #ifdef CONFIG_IWLWIFI_DEBUGFS
445 const struct fw_img *img;
446 #endif
447
448 IWL_DEBUG_MAC80211(priv, "enter\n");
449 mutex_lock(&priv->mutex);
450
451 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
452 vif = ctx->vif;
453
454 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
455 if (ret)
456 goto out_unlock;
457
458 if (d3_status != IWL_D3_STATUS_ALIVE) {
459 IWL_INFO(priv, "Device was reset during suspend\n");
460 goto out_unlock;
461 }
462
463 /* uCode is no longer operating by itself */
464 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
465 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
466
467 base = priv->device_pointers.error_event_table;
468 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
469 IWL_WARN(priv, "Invalid error table during resume!\n");
470 goto out_unlock;
471 }
472
473 iwl_trans_read_mem_bytes(priv->trans, base,
474 &err_info, sizeof(err_info));
475
476 if (err_info.valid) {
477 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
478 err_info.valid, err_info.error_id);
479 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
480 wakeup.rfkill_release = true;
481 ieee80211_report_wowlan_wakeup(vif, &wakeup,
482 GFP_KERNEL);
483 }
484 goto out_unlock;
485 }
486
487 #ifdef CONFIG_IWLWIFI_DEBUGFS
488 img = &priv->fw->img[IWL_UCODE_WOWLAN];
489 if (!priv->wowlan_sram)
490 priv->wowlan_sram =
491 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
492 GFP_KERNEL);
493
494 if (priv->wowlan_sram)
495 iwl_trans_read_mem(priv->trans, 0x800000,
496 priv->wowlan_sram,
497 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
498 #endif
499
500 /*
501 * This is very strange. The GET_STATUS command is sent but the device
502 * doesn't reply properly, it seems it doesn't close the RBD so one is
503 * always left open ... As a result, we need to send another command
504 * and have to reset the driver afterwards. As we need to switch to
505 * runtime firmware again that'll happen.
506 */
507
508 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
509 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
510 &resume_data);
511
512 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
513 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
514 /* an RBD is left open in the firmware now! */
515
516 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
517 if (ret)
518 goto out_unlock;
519
520 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
521 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
522 struct cfg80211_wowlan_wakeup *wakeup_report;
523
524 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
525
526 if (reasons) {
527 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
528 wakeup.magic_pkt = true;
529 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
530 wakeup.pattern_idx = status_data.pattern_number;
531 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
532 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
533 wakeup.disconnect = true;
534 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
535 wakeup.gtk_rekey_failure = true;
536 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
537 wakeup.eap_identity_req = true;
538 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
539 wakeup.four_way_handshake = true;
540 wakeup_report = &wakeup;
541 } else {
542 wakeup_report = NULL;
543 }
544
545 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
546 }
547
548 priv->wowlan = false;
549
550 iwlagn_prepare_restart(priv);
551
552 memset((void *)&ctx->active, 0, sizeof(ctx->active));
553 iwl_connection_init_rx_config(priv, ctx);
554 iwlagn_set_rxon_chain(priv, ctx);
555
556 out_unlock:
557 mutex_unlock(&priv->mutex);
558 IWL_DEBUG_MAC80211(priv, "leave\n");
559
560 ieee80211_resume_disconnect(vif);
561
562 return 1;
563 }
564
565 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
566 {
567 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
568
569 device_set_wakeup_enable(priv->trans->dev, enabled);
570 }
571 #endif
572
573 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
574 struct ieee80211_tx_control *control,
575 struct sk_buff *skb)
576 {
577 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
578
579 if (iwlagn_tx_skb(priv, control->sta, skb))
580 ieee80211_free_txskb(hw, skb);
581 }
582
583 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
584 struct ieee80211_vif *vif,
585 struct ieee80211_key_conf *keyconf,
586 struct ieee80211_sta *sta,
587 u32 iv32, u16 *phase1key)
588 {
589 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
590
591 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
592 }
593
594 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
595 struct ieee80211_vif *vif,
596 struct ieee80211_sta *sta,
597 struct ieee80211_key_conf *key)
598 {
599 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
600 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
601 struct iwl_rxon_context *ctx = vif_priv->ctx;
602 int ret;
603 bool is_default_wep_key = false;
604
605 IWL_DEBUG_MAC80211(priv, "enter\n");
606
607 if (iwlwifi_mod_params.swcrypto) {
608 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
609 return -EOPNOTSUPP;
610 }
611
612 switch (key->cipher) {
613 case WLAN_CIPHER_SUITE_TKIP:
614 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
615 fallthrough;
616 case WLAN_CIPHER_SUITE_CCMP:
617 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
618 break;
619 default:
620 break;
621 }
622
623 /*
624 * We could program these keys into the hardware as well, but we
625 * don't expect much multicast traffic in IBSS and having keys
626 * for more stations is probably more useful.
627 *
628 * Mark key TX-only and return 0.
629 */
630 if (vif->type == NL80211_IFTYPE_ADHOC &&
631 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
632 key->hw_key_idx = WEP_INVALID_OFFSET;
633 return 0;
634 }
635
636 /* If they key was TX-only, accept deletion */
637 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
638 return 0;
639
640 mutex_lock(&priv->mutex);
641 iwl_scan_cancel_timeout(priv, 100);
642
643 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
644
645 /*
646 * If we are getting WEP group key and we didn't receive any key mapping
647 * so far, we are in legacy wep mode (group key only), otherwise we are
648 * in 1X mode.
649 * In legacy wep mode, we use another host command to the uCode.
650 */
651 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
652 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
653 if (cmd == SET_KEY)
654 is_default_wep_key = !ctx->key_mapping_keys;
655 else
656 is_default_wep_key =
657 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
658 }
659
660
661 switch (cmd) {
662 case SET_KEY:
663 if (is_default_wep_key) {
664 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
665 break;
666 }
667 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
668 if (ret) {
669 /*
670 * can't add key for RX, but we don't need it
671 * in the device for TX so still return 0
672 */
673 ret = 0;
674 key->hw_key_idx = WEP_INVALID_OFFSET;
675 }
676
677 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
678 break;
679 case DISABLE_KEY:
680 if (is_default_wep_key)
681 ret = iwl_remove_default_wep_key(priv, ctx, key);
682 else
683 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
684
685 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
686 break;
687 default:
688 ret = -EINVAL;
689 }
690
691 mutex_unlock(&priv->mutex);
692 IWL_DEBUG_MAC80211(priv, "leave\n");
693
694 return ret;
695 }
696
697 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
698 struct ieee80211_vif *vif,
699 struct ieee80211_ampdu_params *params)
700 {
701 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
702 int ret = -EINVAL;
703 struct ieee80211_sta *sta = params->sta;
704 enum ieee80211_ampdu_mlme_action action = params->action;
705 u16 tid = params->tid;
706 u16 *ssn = &params->ssn;
707 u8 buf_size = params->buf_size;
708 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
709
710 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
711 sta->addr, tid);
712
713 if (!(priv->nvm_data->sku_cap_11n_enable))
714 return -EACCES;
715
716 IWL_DEBUG_MAC80211(priv, "enter\n");
717 mutex_lock(&priv->mutex);
718
719 switch (action) {
720 case IEEE80211_AMPDU_RX_START:
721 if (!iwl_enable_rx_ampdu())
722 break;
723 IWL_DEBUG_HT(priv, "start Rx\n");
724 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
725 break;
726 case IEEE80211_AMPDU_RX_STOP:
727 IWL_DEBUG_HT(priv, "stop Rx\n");
728 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
729 break;
730 case IEEE80211_AMPDU_TX_START:
731 if (!iwl_enable_tx_ampdu())
732 break;
733 IWL_DEBUG_HT(priv, "start Tx\n");
734 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
735 break;
736 case IEEE80211_AMPDU_TX_STOP_FLUSH:
737 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
738 IWL_DEBUG_HT(priv, "Flush Tx\n");
739 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
740 break;
741 case IEEE80211_AMPDU_TX_STOP_CONT:
742 IWL_DEBUG_HT(priv, "stop Tx\n");
743 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
744 if ((ret == 0) && (priv->agg_tids_count > 0)) {
745 priv->agg_tids_count--;
746 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
747 priv->agg_tids_count);
748 }
749 if (!priv->agg_tids_count &&
750 priv->hw_params.use_rts_for_aggregation) {
751 /*
752 * switch off RTS/CTS if it was previously enabled
753 */
754 sta_priv->lq_sta.lq.general_params.flags &=
755 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
756 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
757 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
758 }
759 break;
760 case IEEE80211_AMPDU_TX_OPERATIONAL:
761 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
762 break;
763 }
764 mutex_unlock(&priv->mutex);
765 IWL_DEBUG_MAC80211(priv, "leave\n");
766 return ret;
767 }
768
769 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
770 struct ieee80211_vif *vif,
771 struct ieee80211_sta *sta)
772 {
773 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
774 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
775 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
776 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
777 int ret;
778 u8 sta_id;
779
780 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
781 sta->addr);
782 sta_priv->sta_id = IWL_INVALID_STATION;
783
784 atomic_set(&sta_priv->pending_frames, 0);
785 if (vif->type == NL80211_IFTYPE_AP)
786 sta_priv->client = true;
787
788 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
789 is_ap, sta, &sta_id);
790 if (ret) {
791 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
792 sta->addr, ret);
793 /* Should we return success if return code is EEXIST ? */
794 return ret;
795 }
796
797 sta_priv->sta_id = sta_id;
798
799 return 0;
800 }
801
802 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
803 struct ieee80211_vif *vif,
804 struct ieee80211_sta *sta)
805 {
806 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
807 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
808 int ret;
809
810 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
811
812 if (vif->type == NL80211_IFTYPE_STATION) {
813 /*
814 * Station will be removed from device when the RXON
815 * is set to unassociated -- just deactivate it here
816 * to avoid re-programming it.
817 */
818 ret = 0;
819 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
820 } else {
821 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
822 if (ret)
823 IWL_DEBUG_QUIET_RFKILL(priv,
824 "Error removing station %pM\n", sta->addr);
825 }
826 return ret;
827 }
828
829 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
830 struct ieee80211_vif *vif,
831 struct ieee80211_sta *sta,
832 enum ieee80211_sta_state old_state,
833 enum ieee80211_sta_state new_state)
834 {
835 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
836 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
837 enum {
838 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
839 } op = NONE;
840 int ret;
841
842 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
843 sta->addr, old_state, new_state);
844
845 mutex_lock(&priv->mutex);
846 if (vif->type == NL80211_IFTYPE_STATION) {
847 if (old_state == IEEE80211_STA_NOTEXIST &&
848 new_state == IEEE80211_STA_NONE)
849 op = ADD;
850 else if (old_state == IEEE80211_STA_NONE &&
851 new_state == IEEE80211_STA_NOTEXIST)
852 op = REMOVE;
853 else if (old_state == IEEE80211_STA_AUTH &&
854 new_state == IEEE80211_STA_ASSOC)
855 op = HT_RATE_INIT;
856 } else {
857 if (old_state == IEEE80211_STA_AUTH &&
858 new_state == IEEE80211_STA_ASSOC)
859 op = ADD_RATE_INIT;
860 else if (old_state == IEEE80211_STA_ASSOC &&
861 new_state == IEEE80211_STA_AUTH)
862 op = REMOVE;
863 }
864
865 switch (op) {
866 case ADD:
867 ret = iwlagn_mac_sta_add(hw, vif, sta);
868 if (ret)
869 break;
870 /*
871 * Clear the in-progress flag, the AP station entry was added
872 * but we'll initialize LQ only when we've associated (which
873 * would also clear the in-progress flag). This is necessary
874 * in case we never initialize LQ because association fails.
875 */
876 spin_lock_bh(&priv->sta_lock);
877 priv->stations[iwl_sta_id(sta)].used &=
878 ~IWL_STA_UCODE_INPROGRESS;
879 spin_unlock_bh(&priv->sta_lock);
880 break;
881 case REMOVE:
882 ret = iwlagn_mac_sta_remove(hw, vif, sta);
883 break;
884 case ADD_RATE_INIT:
885 ret = iwlagn_mac_sta_add(hw, vif, sta);
886 if (ret)
887 break;
888 /* Initialize rate scaling */
889 IWL_DEBUG_INFO(priv,
890 "Initializing rate scaling for station %pM\n",
891 sta->addr);
892 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
893 ret = 0;
894 break;
895 case HT_RATE_INIT:
896 /* Initialize rate scaling */
897 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
898 if (ret)
899 break;
900 IWL_DEBUG_INFO(priv,
901 "Initializing rate scaling for station %pM\n",
902 sta->addr);
903 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
904 ret = 0;
905 break;
906 default:
907 ret = 0;
908 break;
909 }
910
911 /*
912 * mac80211 might WARN if we fail, but due the way we
913 * (badly) handle hard rfkill, we might fail here
914 */
915 if (iwl_is_rfkill(priv))
916 ret = 0;
917
918 mutex_unlock(&priv->mutex);
919 IWL_DEBUG_MAC80211(priv, "leave\n");
920
921 return ret;
922 }
923
924 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
925 struct ieee80211_vif *vif,
926 struct ieee80211_channel_switch *ch_switch)
927 {
928 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
929 struct ieee80211_conf *conf = &hw->conf;
930 struct ieee80211_channel *channel = ch_switch->chandef.chan;
931 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
932 /*
933 * MULTI-FIXME
934 * When we add support for multiple interfaces, we need to
935 * revisit this. The channel switch command in the device
936 * only affects the BSS context, but what does that really
937 * mean? And what if we get a CSA on the second interface?
938 * This needs a lot of work.
939 */
940 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
941 u16 ch;
942
943 IWL_DEBUG_MAC80211(priv, "enter\n");
944
945 mutex_lock(&priv->mutex);
946
947 if (iwl_is_rfkill(priv))
948 goto out;
949
950 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
951 test_bit(STATUS_SCANNING, &priv->status) ||
952 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
953 goto out;
954
955 if (!iwl_is_associated_ctx(ctx))
956 goto out;
957
958 if (!priv->lib->set_channel_switch)
959 goto out;
960
961 ch = channel->hw_value;
962 if (le16_to_cpu(ctx->active.channel) == ch)
963 goto out;
964
965 priv->current_ht_config.smps = conf->smps_mode;
966
967 /* Configure HT40 channels */
968 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
969 case NL80211_CHAN_NO_HT:
970 case NL80211_CHAN_HT20:
971 ctx->ht.is_40mhz = false;
972 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
973 break;
974 case NL80211_CHAN_HT40MINUS:
975 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
976 ctx->ht.is_40mhz = true;
977 break;
978 case NL80211_CHAN_HT40PLUS:
979 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
980 ctx->ht.is_40mhz = true;
981 break;
982 }
983
984 if ((le16_to_cpu(ctx->staging.channel) != ch))
985 ctx->staging.flags = 0;
986
987 iwl_set_rxon_channel(priv, channel, ctx);
988 iwl_set_rxon_ht(priv, ht_conf);
989 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
990
991 /*
992 * at this point, staging_rxon has the
993 * configuration for channel switch
994 */
995 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
996 priv->switch_channel = cpu_to_le16(ch);
997 if (priv->lib->set_channel_switch(priv, ch_switch)) {
998 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
999 priv->switch_channel = 0;
1000 ieee80211_chswitch_done(ctx->vif, false, 0);
1001 }
1002
1003 out:
1004 mutex_unlock(&priv->mutex);
1005 IWL_DEBUG_MAC80211(priv, "leave\n");
1006 }
1007
1008 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1009 {
1010 /*
1011 * MULTI-FIXME
1012 * See iwlagn_mac_channel_switch.
1013 */
1014 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1015
1016 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1017 return;
1018
1019 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1020 return;
1021
1022 if (ctx->vif)
1023 ieee80211_chswitch_done(ctx->vif, is_success, 0);
1024 }
1025
1026 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1027 unsigned int changed_flags,
1028 unsigned int *total_flags,
1029 u64 multicast)
1030 {
1031 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1032 __le32 filter_or = 0, filter_nand = 0;
1033 struct iwl_rxon_context *ctx;
1034
1035 #define CHK(test, flag) do { \
1036 if (*total_flags & (test)) \
1037 filter_or |= (flag); \
1038 else \
1039 filter_nand |= (flag); \
1040 } while (0)
1041
1042 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1043 changed_flags, *total_flags);
1044
1045 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1046 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1047 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1048 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1049
1050 #undef CHK
1051
1052 mutex_lock(&priv->mutex);
1053
1054 for_each_context(priv, ctx) {
1055 ctx->staging.filter_flags &= ~filter_nand;
1056 ctx->staging.filter_flags |= filter_or;
1057
1058 /*
1059 * Not committing directly because hardware can perform a scan,
1060 * but we'll eventually commit the filter flags change anyway.
1061 */
1062 }
1063
1064 mutex_unlock(&priv->mutex);
1065
1066 /*
1067 * Receiving all multicast frames is always enabled by the
1068 * default flags setup in iwl_connection_init_rx_config()
1069 * since we currently do not support programming multicast
1070 * filters into the device.
1071 */
1072 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1073 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1074 }
1075
1076 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1077 u32 queues, bool drop)
1078 {
1079 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1080 u32 scd_queues;
1081
1082 mutex_lock(&priv->mutex);
1083 IWL_DEBUG_MAC80211(priv, "enter\n");
1084
1085 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1086 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1087 goto done;
1088 }
1089 if (iwl_is_rfkill(priv)) {
1090 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1091 goto done;
1092 }
1093
1094 scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1;
1095 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1096 BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1097
1098 if (drop) {
1099 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1100 scd_queues);
1101 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1102 IWL_ERR(priv, "flush request fail\n");
1103 goto done;
1104 }
1105 }
1106
1107 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1108 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1109 done:
1110 mutex_unlock(&priv->mutex);
1111 IWL_DEBUG_MAC80211(priv, "leave\n");
1112 }
1113
1114 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1115 struct ieee80211_vif *vif,
1116 const struct ieee80211_event *event)
1117 {
1118 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1119
1120 if (event->type != RSSI_EVENT)
1121 return;
1122
1123 IWL_DEBUG_MAC80211(priv, "enter\n");
1124
1125 if (priv->lib->bt_params &&
1126 priv->lib->bt_params->advanced_bt_coexist) {
1127 if (event->u.rssi.data == RSSI_EVENT_LOW)
1128 priv->bt_enable_pspoll = true;
1129 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1130 priv->bt_enable_pspoll = false;
1131
1132 queue_work(priv->workqueue, &priv->bt_runtime_config);
1133 } else {
1134 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1135 "ignoring RSSI callback\n");
1136 }
1137
1138 IWL_DEBUG_MAC80211(priv, "leave\n");
1139 }
1140
1141 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1142 struct ieee80211_sta *sta, bool set)
1143 {
1144 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1145
1146 queue_work(priv->workqueue, &priv->beacon_update);
1147
1148 return 0;
1149 }
1150
1151 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1152 struct ieee80211_vif *vif,
1153 unsigned int link_id, u16 queue,
1154 const struct ieee80211_tx_queue_params *params)
1155 {
1156 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1157 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1158 struct iwl_rxon_context *ctx = vif_priv->ctx;
1159 int q;
1160
1161 if (WARN_ON(!ctx))
1162 return -EINVAL;
1163
1164 IWL_DEBUG_MAC80211(priv, "enter\n");
1165
1166 if (!iwl_is_ready_rf(priv)) {
1167 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1168 return -EIO;
1169 }
1170
1171 if (queue >= AC_NUM) {
1172 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1173 return 0;
1174 }
1175
1176 q = AC_NUM - 1 - queue;
1177
1178 mutex_lock(&priv->mutex);
1179
1180 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1181 cpu_to_le16(params->cw_min);
1182 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1183 cpu_to_le16(params->cw_max);
1184 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1185 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1186 cpu_to_le16((params->txop * 32));
1187
1188 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1189
1190 mutex_unlock(&priv->mutex);
1191
1192 IWL_DEBUG_MAC80211(priv, "leave\n");
1193 return 0;
1194 }
1195
1196 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1197 {
1198 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1199
1200 return priv->ibss_manager == IWL_IBSS_MANAGER;
1201 }
1202
1203 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1204 {
1205 iwl_connection_init_rx_config(priv, ctx);
1206
1207 iwlagn_set_rxon_chain(priv, ctx);
1208
1209 return iwlagn_commit_rxon(priv, ctx);
1210 }
1211
1212 static int iwl_setup_interface(struct iwl_priv *priv,
1213 struct iwl_rxon_context *ctx)
1214 {
1215 struct ieee80211_vif *vif = ctx->vif;
1216 int err, ac;
1217
1218 lockdep_assert_held(&priv->mutex);
1219
1220 /*
1221 * This variable will be correct only when there's just
1222 * a single context, but all code using it is for hardware
1223 * that supports only one context.
1224 */
1225 priv->iw_mode = vif->type;
1226
1227 ctx->is_active = true;
1228
1229 err = iwl_set_mode(priv, ctx);
1230 if (err) {
1231 if (!ctx->always_active)
1232 ctx->is_active = false;
1233 return err;
1234 }
1235
1236 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1237 vif->type == NL80211_IFTYPE_ADHOC) {
1238 /*
1239 * pretend to have high BT traffic as long as we
1240 * are operating in IBSS mode, as this will cause
1241 * the rate scaling etc. to behave as intended.
1242 */
1243 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1244 }
1245
1246 /* set up queue mappings */
1247 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1248 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1249
1250 if (vif->type == NL80211_IFTYPE_AP)
1251 vif->cab_queue = ctx->mcast_queue;
1252 else
1253 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1254
1255 return 0;
1256 }
1257
1258 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1259 struct ieee80211_vif *vif)
1260 {
1261 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1262 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1263 struct iwl_rxon_context *tmp, *ctx = NULL;
1264 int err;
1265 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1266 bool reset = false;
1267
1268 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1269 viftype, vif->addr);
1270
1271 mutex_lock(&priv->mutex);
1272
1273 if (!iwl_is_ready_rf(priv)) {
1274 IWL_WARN(priv, "Try to add interface when device not ready\n");
1275 err = -EINVAL;
1276 goto out;
1277 }
1278
1279 for_each_context(priv, tmp) {
1280 u32 possible_modes =
1281 tmp->interface_modes | tmp->exclusive_interface_modes;
1282
1283 if (tmp->vif) {
1284 /* On reset we need to add the same interface again */
1285 if (tmp->vif == vif) {
1286 reset = true;
1287 ctx = tmp;
1288 break;
1289 }
1290
1291 /* check if this busy context is exclusive */
1292 if (tmp->exclusive_interface_modes &
1293 BIT(tmp->vif->type)) {
1294 err = -EINVAL;
1295 goto out;
1296 }
1297 continue;
1298 }
1299
1300 if (!(possible_modes & BIT(viftype)))
1301 continue;
1302
1303 /* have maybe usable context w/o interface */
1304 ctx = tmp;
1305 break;
1306 }
1307
1308 if (!ctx) {
1309 err = -EOPNOTSUPP;
1310 goto out;
1311 }
1312
1313 vif_priv->ctx = ctx;
1314 ctx->vif = vif;
1315
1316 /*
1317 * In SNIFFER device type, the firmware reports the FCS to
1318 * the host, rather than snipping it off. Unfortunately,
1319 * mac80211 doesn't (yet) provide a per-packet flag for
1320 * this, so that we have to set the hardware flag based
1321 * on the interfaces added. As the monitor interface can
1322 * only be present by itself, and will be removed before
1323 * other interfaces are added, this is safe.
1324 */
1325 if (vif->type == NL80211_IFTYPE_MONITOR)
1326 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1327 else
1328 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1329
1330 err = iwl_setup_interface(priv, ctx);
1331 if (!err || reset)
1332 goto out;
1333
1334 ctx->vif = NULL;
1335 priv->iw_mode = NL80211_IFTYPE_STATION;
1336 out:
1337 mutex_unlock(&priv->mutex);
1338
1339 IWL_DEBUG_MAC80211(priv, "leave\n");
1340 return err;
1341 }
1342
1343 static void iwl_teardown_interface(struct iwl_priv *priv,
1344 struct ieee80211_vif *vif,
1345 bool mode_change)
1346 {
1347 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1348
1349 lockdep_assert_held(&priv->mutex);
1350
1351 if (priv->scan_vif == vif) {
1352 iwl_scan_cancel_timeout(priv, 200);
1353 iwl_force_scan_end(priv);
1354 }
1355
1356 if (!mode_change) {
1357 iwl_set_mode(priv, ctx);
1358 if (!ctx->always_active)
1359 ctx->is_active = false;
1360 }
1361
1362 /*
1363 * When removing the IBSS interface, overwrite the
1364 * BT traffic load with the stored one from the last
1365 * notification, if any. If this is a device that
1366 * doesn't implement this, this has no effect since
1367 * both values are the same and zero.
1368 */
1369 if (vif->type == NL80211_IFTYPE_ADHOC)
1370 priv->bt_traffic_load = priv->last_bt_traffic_load;
1371 }
1372
1373 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1374 struct ieee80211_vif *vif)
1375 {
1376 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1377 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1378
1379 IWL_DEBUG_MAC80211(priv, "enter\n");
1380
1381 mutex_lock(&priv->mutex);
1382
1383 WARN_ON(ctx->vif != vif);
1384 ctx->vif = NULL;
1385
1386 iwl_teardown_interface(priv, vif, false);
1387
1388 mutex_unlock(&priv->mutex);
1389
1390 IWL_DEBUG_MAC80211(priv, "leave\n");
1391
1392 }
1393
1394 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1395 struct ieee80211_vif *vif,
1396 enum nl80211_iftype newtype, bool newp2p)
1397 {
1398 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1399 struct iwl_rxon_context *ctx, *tmp;
1400 enum nl80211_iftype newviftype = newtype;
1401 u32 interface_modes;
1402 int err;
1403
1404 IWL_DEBUG_MAC80211(priv, "enter\n");
1405
1406 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1407
1408 mutex_lock(&priv->mutex);
1409
1410 ctx = iwl_rxon_ctx_from_vif(vif);
1411
1412 /*
1413 * To simplify this code, only support changes on the
1414 * BSS context. The PAN context is usually reassigned
1415 * by creating/removing P2P interfaces anyway.
1416 */
1417 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1418 err = -EBUSY;
1419 goto out;
1420 }
1421
1422 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1423 /*
1424 * Huh? But wait ... this can maybe happen when
1425 * we're in the middle of a firmware restart!
1426 */
1427 err = -EBUSY;
1428 goto out;
1429 }
1430
1431 /* Check if the switch is supported in the same context */
1432 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1433 if (!(interface_modes & BIT(newtype))) {
1434 err = -EBUSY;
1435 goto out;
1436 }
1437
1438 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1439 for_each_context(priv, tmp) {
1440 if (ctx == tmp)
1441 continue;
1442
1443 if (!tmp->is_active)
1444 continue;
1445
1446 /*
1447 * The current mode switch would be exclusive, but
1448 * another context is active ... refuse the switch.
1449 */
1450 err = -EBUSY;
1451 goto out;
1452 }
1453 }
1454
1455 /* success */
1456 iwl_teardown_interface(priv, vif, true);
1457 vif->type = newviftype;
1458 vif->p2p = newp2p;
1459 err = iwl_setup_interface(priv, ctx);
1460 WARN_ON(err);
1461 /*
1462 * We've switched internally, but submitting to the
1463 * device may have failed for some reason. Mask this
1464 * error, because otherwise mac80211 will not switch
1465 * (and set the interface type back) and we'll be
1466 * out of sync with it.
1467 */
1468 err = 0;
1469
1470 out:
1471 mutex_unlock(&priv->mutex);
1472 IWL_DEBUG_MAC80211(priv, "leave\n");
1473
1474 return err;
1475 }
1476
1477 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1478 struct ieee80211_vif *vif,
1479 struct ieee80211_scan_request *hw_req)
1480 {
1481 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1482 struct cfg80211_scan_request *req = &hw_req->req;
1483 int ret;
1484
1485 IWL_DEBUG_MAC80211(priv, "enter\n");
1486
1487 if (req->n_channels == 0)
1488 return -EINVAL;
1489
1490 mutex_lock(&priv->mutex);
1491
1492 /*
1493 * If an internal scan is in progress, just set
1494 * up the scan_request as per above.
1495 */
1496 if (priv->scan_type != IWL_SCAN_NORMAL) {
1497 IWL_DEBUG_SCAN(priv,
1498 "SCAN request during internal scan - defer\n");
1499 priv->scan_request = req;
1500 priv->scan_vif = vif;
1501 ret = 0;
1502 } else {
1503 priv->scan_request = req;
1504 priv->scan_vif = vif;
1505 /*
1506 * mac80211 will only ask for one band at a time
1507 * so using channels[0] here is ok
1508 */
1509 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1510 req->channels[0]->band);
1511 if (ret) {
1512 priv->scan_request = NULL;
1513 priv->scan_vif = NULL;
1514 }
1515 }
1516
1517 IWL_DEBUG_MAC80211(priv, "leave\n");
1518
1519 mutex_unlock(&priv->mutex);
1520
1521 return ret;
1522 }
1523
1524 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1525 {
1526 struct iwl_addsta_cmd cmd = {
1527 .mode = STA_CONTROL_MODIFY_MSK,
1528 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1529 .sta.sta_id = sta_id,
1530 };
1531
1532 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1533 }
1534
1535 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1536 struct ieee80211_vif *vif,
1537 enum sta_notify_cmd cmd,
1538 struct ieee80211_sta *sta)
1539 {
1540 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1541 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1542 int sta_id;
1543
1544 IWL_DEBUG_MAC80211(priv, "enter\n");
1545
1546 switch (cmd) {
1547 case STA_NOTIFY_SLEEP:
1548 WARN_ON(!sta_priv->client);
1549 sta_priv->asleep = true;
1550 if (atomic_read(&sta_priv->pending_frames) > 0)
1551 ieee80211_sta_block_awake(hw, sta, true);
1552 break;
1553 case STA_NOTIFY_AWAKE:
1554 WARN_ON(!sta_priv->client);
1555 if (!sta_priv->asleep)
1556 break;
1557 sta_priv->asleep = false;
1558 sta_id = iwl_sta_id(sta);
1559 if (sta_id != IWL_INVALID_STATION)
1560 iwl_sta_modify_ps_wake(priv, sta_id);
1561 break;
1562 default:
1563 break;
1564 }
1565 IWL_DEBUG_MAC80211(priv, "leave\n");
1566 }
1567
1568 const struct ieee80211_ops iwlagn_hw_ops = {
1569 .add_chanctx = ieee80211_emulate_add_chanctx,
1570 .remove_chanctx = ieee80211_emulate_remove_chanctx,
1571 .change_chanctx = ieee80211_emulate_change_chanctx,
1572 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
1573 .tx = iwlagn_mac_tx,
1574 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
1575 .start = iwlagn_mac_start,
1576 .stop = iwlagn_mac_stop,
1577 #ifdef CONFIG_PM_SLEEP
1578 .suspend = iwlagn_mac_suspend,
1579 .resume = iwlagn_mac_resume,
1580 .set_wakeup = iwlagn_mac_set_wakeup,
1581 #endif
1582 .add_interface = iwlagn_mac_add_interface,
1583 .remove_interface = iwlagn_mac_remove_interface,
1584 .change_interface = iwlagn_mac_change_interface,
1585 .config = iwlagn_mac_config,
1586 .configure_filter = iwlagn_configure_filter,
1587 .set_key = iwlagn_mac_set_key,
1588 .update_tkip_key = iwlagn_mac_update_tkip_key,
1589 .set_rekey_data = iwlagn_mac_set_rekey_data,
1590 .conf_tx = iwlagn_mac_conf_tx,
1591 .bss_info_changed = iwlagn_bss_info_changed,
1592 .ampdu_action = iwlagn_mac_ampdu_action,
1593 .hw_scan = iwlagn_mac_hw_scan,
1594 .sta_notify = iwlagn_mac_sta_notify,
1595 .sta_state = iwlagn_mac_sta_state,
1596 .channel_switch = iwlagn_mac_channel_switch,
1597 .flush = iwlagn_mac_flush,
1598 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1599 .event_callback = iwlagn_mac_event_callback,
1600 .set_tim = iwlagn_mac_set_tim,
1601 };
1602
1603 /* This function both allocates and initializes hw and priv. */
1604 struct ieee80211_hw *iwl_alloc_all(void)
1605 {
1606 struct iwl_priv *priv;
1607 struct iwl_op_mode *op_mode;
1608 /* mac80211 allocates memory for this device instance, including
1609 * space for this driver's private structure */
1610 struct ieee80211_hw *hw;
1611
1612 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1613 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1614 if (!hw)
1615 goto out;
1616
1617 op_mode = hw->priv;
1618 priv = IWL_OP_MODE_GET_DVM(op_mode);
1619 priv->hw = hw;
1620
1621 out:
1622 return hw;
1623 }
Linux Kernel