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 - 2025 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 */
iwlagn_mac_setup_register(struct iwl_priv * priv,const struct iwl_ucode_capabilities * capa)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->info.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->info.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
iwlagn_mac_unregister(struct iwl_priv * priv)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
__iwl_up(struct iwl_priv * priv)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
iwlagn_mac_start(struct ieee80211_hw * hw)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
iwlagn_mac_stop(struct ieee80211_hw * hw,bool suspend)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
iwlagn_mac_set_rekey_data(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct cfg80211_gtk_rekey_data * data)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
iwlagn_mac_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)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, 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
iwl_resume_status_fn(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)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
iwlagn_mac_resume(struct ieee80211_hw * hw)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 struct error_table_start {
426 /* cf. struct iwl_error_event_table */
427 u32 valid;
428 u32 error_id;
429 } err_info;
430 struct iwl_notification_wait status_wait;
431 static const u16 status_cmd[] = {
432 REPLY_WOWLAN_GET_STATUS,
433 };
434 struct iwlagn_wowlan_status status_data = {};
435 struct iwl_resume_data resume_data = {
436 .priv = priv,
437 .cmd = &status_data,
438 .valid = false,
439 };
440 struct cfg80211_wowlan_wakeup wakeup = {
441 .pattern_idx = -1,
442 };
443 #ifdef CONFIG_IWLWIFI_DEBUGFS
444 const struct fw_img *img;
445 #endif
446
447 IWL_DEBUG_MAC80211(priv, "enter\n");
448 mutex_lock(&priv->mutex);
449
450 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
451 vif = ctx->vif;
452
453 ret = iwl_trans_d3_resume(priv->trans, true);
454 if (ret)
455 goto out_unlock;
456
457 /* uCode is no longer operating by itself */
458 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
459 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
460
461 base = priv->device_pointers.error_event_table;
462 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
463 IWL_WARN(priv, "Invalid error table during resume!\n");
464 goto out_unlock;
465 }
466
467 iwl_trans_read_mem_bytes(priv->trans, base,
468 &err_info, sizeof(err_info));
469
470 if (err_info.valid) {
471 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
472 err_info.valid, err_info.error_id);
473 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
474 wakeup.rfkill_release = true;
475 ieee80211_report_wowlan_wakeup(vif, &wakeup,
476 GFP_KERNEL);
477 }
478 goto out_unlock;
479 }
480
481 #ifdef CONFIG_IWLWIFI_DEBUGFS
482 img = &priv->fw->img[IWL_UCODE_WOWLAN];
483 if (!priv->wowlan_sram)
484 priv->wowlan_sram =
485 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
486 GFP_KERNEL);
487
488 if (priv->wowlan_sram)
489 iwl_trans_read_mem(priv->trans, 0x800000,
490 priv->wowlan_sram,
491 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
492 #endif
493
494 /*
495 * This is very strange. The GET_STATUS command is sent but the device
496 * doesn't reply properly, it seems it doesn't close the RBD so one is
497 * always left open ... As a result, we need to send another command
498 * and have to reset the driver afterwards. As we need to switch to
499 * runtime firmware again that'll happen.
500 */
501
502 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
503 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
504 &resume_data);
505
506 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
507 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
508 /* an RBD is left open in the firmware now! */
509
510 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
511 if (ret)
512 goto out_unlock;
513
514 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
515 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
516 struct cfg80211_wowlan_wakeup *wakeup_report;
517
518 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
519
520 if (reasons) {
521 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
522 wakeup.magic_pkt = true;
523 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
524 wakeup.pattern_idx = status_data.pattern_number;
525 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
526 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
527 wakeup.disconnect = true;
528 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
529 wakeup.gtk_rekey_failure = true;
530 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
531 wakeup.eap_identity_req = true;
532 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
533 wakeup.four_way_handshake = true;
534 wakeup_report = &wakeup;
535 } else {
536 wakeup_report = NULL;
537 }
538
539 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
540 }
541
542 priv->wowlan = false;
543
544 iwlagn_prepare_restart(priv);
545
546 memset((void *)(uintptr_t)&ctx->active, 0, sizeof(ctx->active));
547 iwl_connection_init_rx_config(priv, ctx);
548 iwlagn_set_rxon_chain(priv, ctx);
549
550 out_unlock:
551 mutex_unlock(&priv->mutex);
552 IWL_DEBUG_MAC80211(priv, "leave\n");
553
554 ieee80211_resume_disconnect(vif);
555
556 return 1;
557 }
558
iwlagn_mac_set_wakeup(struct ieee80211_hw * hw,bool enabled)559 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
560 {
561 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
562
563 device_set_wakeup_enable(priv->trans->dev, enabled);
564 }
565 #endif
566
iwlagn_mac_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)567 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
568 struct ieee80211_tx_control *control,
569 struct sk_buff *skb)
570 {
571 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
572
573 if (iwlagn_tx_skb(priv, control->sta, skb))
574 ieee80211_free_txskb(hw, skb);
575 }
576
iwlagn_mac_update_tkip_key(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta,u32 iv32,u16 * phase1key)577 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
578 struct ieee80211_vif *vif,
579 struct ieee80211_key_conf *keyconf,
580 struct ieee80211_sta *sta,
581 u32 iv32, u16 *phase1key)
582 {
583 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
584
585 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
586 }
587
iwlagn_mac_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)588 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
589 struct ieee80211_vif *vif,
590 struct ieee80211_sta *sta,
591 struct ieee80211_key_conf *key)
592 {
593 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
594 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
595 struct iwl_rxon_context *ctx = vif_priv->ctx;
596 int ret;
597 bool is_default_wep_key = false;
598
599 IWL_DEBUG_MAC80211(priv, "enter\n");
600
601 if (iwlwifi_mod_params.swcrypto) {
602 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
603 return -EOPNOTSUPP;
604 }
605
606 switch (key->cipher) {
607 case WLAN_CIPHER_SUITE_TKIP:
608 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
609 fallthrough;
610 case WLAN_CIPHER_SUITE_CCMP:
611 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
612 break;
613 default:
614 break;
615 }
616
617 /*
618 * We could program these keys into the hardware as well, but we
619 * don't expect much multicast traffic in IBSS and having keys
620 * for more stations is probably more useful.
621 *
622 * Mark key TX-only and return 0.
623 */
624 if (vif->type == NL80211_IFTYPE_ADHOC &&
625 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
626 key->hw_key_idx = WEP_INVALID_OFFSET;
627 return 0;
628 }
629
630 /* If they key was TX-only, accept deletion */
631 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
632 return 0;
633
634 mutex_lock(&priv->mutex);
635 iwl_scan_cancel_timeout(priv, 100);
636
637 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
638
639 /*
640 * If we are getting WEP group key and we didn't receive any key mapping
641 * so far, we are in legacy wep mode (group key only), otherwise we are
642 * in 1X mode.
643 * In legacy wep mode, we use another host command to the uCode.
644 */
645 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
646 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
647 if (cmd == SET_KEY)
648 is_default_wep_key = !ctx->key_mapping_keys;
649 else
650 is_default_wep_key =
651 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
652 }
653
654
655 switch (cmd) {
656 case SET_KEY:
657 if (is_default_wep_key) {
658 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
659 break;
660 }
661 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
662 if (ret) {
663 /*
664 * can't add key for RX, but we don't need it
665 * in the device for TX so still return 0
666 */
667 ret = 0;
668 key->hw_key_idx = WEP_INVALID_OFFSET;
669 }
670
671 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
672 break;
673 case DISABLE_KEY:
674 if (is_default_wep_key)
675 ret = iwl_remove_default_wep_key(priv, ctx, key);
676 else
677 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
678
679 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
680 break;
681 default:
682 ret = -EINVAL;
683 }
684
685 mutex_unlock(&priv->mutex);
686 IWL_DEBUG_MAC80211(priv, "leave\n");
687
688 return ret;
689 }
690
iwlagn_mac_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)691 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
692 struct ieee80211_vif *vif,
693 struct ieee80211_ampdu_params *params)
694 {
695 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
696 int ret = -EINVAL;
697 struct ieee80211_sta *sta = params->sta;
698 enum ieee80211_ampdu_mlme_action action = params->action;
699 u16 tid = params->tid;
700 u16 *ssn = ¶ms->ssn;
701 u8 buf_size = params->buf_size;
702 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
703
704 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
705 sta->addr, tid);
706
707 if (!(priv->nvm_data->sku_cap_11n_enable))
708 return -EACCES;
709
710 IWL_DEBUG_MAC80211(priv, "enter\n");
711 mutex_lock(&priv->mutex);
712
713 switch (action) {
714 case IEEE80211_AMPDU_RX_START:
715 if (!iwl_enable_rx_ampdu())
716 break;
717 IWL_DEBUG_HT(priv, "start Rx\n");
718 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
719 break;
720 case IEEE80211_AMPDU_RX_STOP:
721 IWL_DEBUG_HT(priv, "stop Rx\n");
722 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
723 break;
724 case IEEE80211_AMPDU_TX_START:
725 if (!iwl_enable_tx_ampdu())
726 break;
727 IWL_DEBUG_HT(priv, "start Tx\n");
728 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
729 break;
730 case IEEE80211_AMPDU_TX_STOP_FLUSH:
731 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
732 IWL_DEBUG_HT(priv, "Flush Tx\n");
733 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
734 break;
735 case IEEE80211_AMPDU_TX_STOP_CONT:
736 IWL_DEBUG_HT(priv, "stop Tx\n");
737 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
738 if ((ret == 0) && (priv->agg_tids_count > 0)) {
739 priv->agg_tids_count--;
740 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
741 priv->agg_tids_count);
742 }
743 if (!priv->agg_tids_count &&
744 priv->hw_params.use_rts_for_aggregation) {
745 /*
746 * switch off RTS/CTS if it was previously enabled
747 */
748 sta_priv->lq_sta.lq.general_params.flags &=
749 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
750 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
751 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
752 }
753 break;
754 case IEEE80211_AMPDU_TX_OPERATIONAL:
755 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
756 break;
757 }
758 mutex_unlock(&priv->mutex);
759 IWL_DEBUG_MAC80211(priv, "leave\n");
760 return ret;
761 }
762
iwlagn_mac_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)763 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
764 struct ieee80211_vif *vif,
765 struct ieee80211_sta *sta)
766 {
767 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
768 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
769 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
770 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
771 int ret;
772 u8 sta_id;
773
774 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
775 sta->addr);
776 sta_priv->sta_id = IWL_INVALID_STATION;
777
778 atomic_set(&sta_priv->pending_frames, 0);
779 if (vif->type == NL80211_IFTYPE_AP)
780 sta_priv->client = true;
781
782 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
783 is_ap, sta, &sta_id);
784 if (ret) {
785 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
786 sta->addr, ret);
787 /* Should we return success if return code is EEXIST ? */
788 return ret;
789 }
790
791 sta_priv->sta_id = sta_id;
792
793 return 0;
794 }
795
iwlagn_mac_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)796 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
797 struct ieee80211_vif *vif,
798 struct ieee80211_sta *sta)
799 {
800 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
801 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
802 int ret;
803
804 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
805
806 if (vif->type == NL80211_IFTYPE_STATION) {
807 /*
808 * Station will be removed from device when the RXON
809 * is set to unassociated -- just deactivate it here
810 * to avoid re-programming it.
811 */
812 ret = 0;
813 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
814 } else {
815 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
816 if (ret)
817 IWL_DEBUG_QUIET_RFKILL(priv,
818 "Error removing station %pM\n", sta->addr);
819 }
820 return ret;
821 }
822
iwlagn_mac_sta_state(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta,enum ieee80211_sta_state old_state,enum ieee80211_sta_state new_state)823 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
824 struct ieee80211_vif *vif,
825 struct ieee80211_sta *sta,
826 enum ieee80211_sta_state old_state,
827 enum ieee80211_sta_state new_state)
828 {
829 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
830 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
831 enum {
832 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
833 } op = NONE;
834 int ret;
835
836 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
837 sta->addr, old_state, new_state);
838
839 mutex_lock(&priv->mutex);
840 if (vif->type == NL80211_IFTYPE_STATION) {
841 if (old_state == IEEE80211_STA_NOTEXIST &&
842 new_state == IEEE80211_STA_NONE)
843 op = ADD;
844 else if (old_state == IEEE80211_STA_NONE &&
845 new_state == IEEE80211_STA_NOTEXIST)
846 op = REMOVE;
847 else if (old_state == IEEE80211_STA_AUTH &&
848 new_state == IEEE80211_STA_ASSOC)
849 op = HT_RATE_INIT;
850 } else {
851 if (old_state == IEEE80211_STA_AUTH &&
852 new_state == IEEE80211_STA_ASSOC)
853 op = ADD_RATE_INIT;
854 else if (old_state == IEEE80211_STA_ASSOC &&
855 new_state == IEEE80211_STA_AUTH)
856 op = REMOVE;
857 }
858
859 switch (op) {
860 case ADD:
861 ret = iwlagn_mac_sta_add(hw, vif, sta);
862 if (ret)
863 break;
864 /*
865 * Clear the in-progress flag, the AP station entry was added
866 * but we'll initialize LQ only when we've associated (which
867 * would also clear the in-progress flag). This is necessary
868 * in case we never initialize LQ because association fails.
869 */
870 spin_lock_bh(&priv->sta_lock);
871 priv->stations[iwl_sta_id(sta)].used &=
872 ~IWL_STA_UCODE_INPROGRESS;
873 spin_unlock_bh(&priv->sta_lock);
874 break;
875 case REMOVE:
876 ret = iwlagn_mac_sta_remove(hw, vif, sta);
877 break;
878 case ADD_RATE_INIT:
879 ret = iwlagn_mac_sta_add(hw, vif, sta);
880 if (ret)
881 break;
882 /* Initialize rate scaling */
883 IWL_DEBUG_INFO(priv,
884 "Initializing rate scaling for station %pM\n",
885 sta->addr);
886 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
887 ret = 0;
888 break;
889 case HT_RATE_INIT:
890 /* Initialize rate scaling */
891 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
892 if (ret)
893 break;
894 IWL_DEBUG_INFO(priv,
895 "Initializing rate scaling for station %pM\n",
896 sta->addr);
897 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
898 ret = 0;
899 break;
900 default:
901 ret = 0;
902 break;
903 }
904
905 /*
906 * mac80211 might WARN if we fail, but due the way we
907 * (badly) handle hard rfkill, we might fail here
908 */
909 if (iwl_is_rfkill(priv))
910 ret = 0;
911
912 mutex_unlock(&priv->mutex);
913 IWL_DEBUG_MAC80211(priv, "leave\n");
914
915 return ret;
916 }
917
iwlagn_mac_channel_switch(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_channel_switch * ch_switch)918 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
919 struct ieee80211_vif *vif,
920 struct ieee80211_channel_switch *ch_switch)
921 {
922 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
923 struct ieee80211_conf *conf = &hw->conf;
924 struct ieee80211_channel *channel = ch_switch->chandef.chan;
925 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
926 /*
927 * MULTI-FIXME
928 * When we add support for multiple interfaces, we need to
929 * revisit this. The channel switch command in the device
930 * only affects the BSS context, but what does that really
931 * mean? And what if we get a CSA on the second interface?
932 * This needs a lot of work.
933 */
934 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
935 u16 ch;
936
937 IWL_DEBUG_MAC80211(priv, "enter\n");
938
939 mutex_lock(&priv->mutex);
940
941 if (iwl_is_rfkill(priv))
942 goto out;
943
944 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
945 test_bit(STATUS_SCANNING, &priv->status) ||
946 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
947 goto out;
948
949 if (!iwl_is_associated_ctx(ctx))
950 goto out;
951
952 if (!priv->lib->set_channel_switch)
953 goto out;
954
955 ch = channel->hw_value;
956 if (le16_to_cpu(ctx->active.channel) == ch)
957 goto out;
958
959 priv->current_ht_config.smps = conf->smps_mode;
960
961 /* Configure HT40 channels */
962 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
963 case NL80211_CHAN_NO_HT:
964 case NL80211_CHAN_HT20:
965 ctx->ht.is_40mhz = false;
966 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
967 break;
968 case NL80211_CHAN_HT40MINUS:
969 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
970 ctx->ht.is_40mhz = true;
971 break;
972 case NL80211_CHAN_HT40PLUS:
973 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
974 ctx->ht.is_40mhz = true;
975 break;
976 }
977
978 if ((le16_to_cpu(ctx->staging.channel) != ch))
979 ctx->staging.flags = 0;
980
981 iwl_set_rxon_channel(priv, channel, ctx);
982 iwl_set_rxon_ht(priv, ht_conf);
983 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
984
985 /*
986 * at this point, staging_rxon has the
987 * configuration for channel switch
988 */
989 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
990 priv->switch_channel = cpu_to_le16(ch);
991 if (priv->lib->set_channel_switch(priv, ch_switch)) {
992 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
993 priv->switch_channel = 0;
994 ieee80211_chswitch_done(ctx->vif, false, 0);
995 }
996
997 out:
998 mutex_unlock(&priv->mutex);
999 IWL_DEBUG_MAC80211(priv, "leave\n");
1000 }
1001
iwl_chswitch_done(struct iwl_priv * priv,bool is_success)1002 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1003 {
1004 /*
1005 * MULTI-FIXME
1006 * See iwlagn_mac_channel_switch.
1007 */
1008 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1009
1010 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1011 return;
1012
1013 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1014 return;
1015
1016 if (ctx->vif)
1017 ieee80211_chswitch_done(ctx->vif, is_success, 0);
1018 }
1019
iwlagn_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)1020 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1021 unsigned int changed_flags,
1022 unsigned int *total_flags,
1023 u64 multicast)
1024 {
1025 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1026 __le32 filter_or = 0, filter_nand = 0;
1027 struct iwl_rxon_context *ctx;
1028
1029 #define CHK(test, flag) do { \
1030 if (*total_flags & (test)) \
1031 filter_or |= (flag); \
1032 else \
1033 filter_nand |= (flag); \
1034 } while (0)
1035
1036 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1037 changed_flags, *total_flags);
1038
1039 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1040 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1041 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1042 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1043
1044 #undef CHK
1045
1046 mutex_lock(&priv->mutex);
1047
1048 for_each_context(priv, ctx) {
1049 ctx->staging.filter_flags &= ~filter_nand;
1050 ctx->staging.filter_flags |= filter_or;
1051
1052 /*
1053 * Not committing directly because hardware can perform a scan,
1054 * but we'll eventually commit the filter flags change anyway.
1055 */
1056 }
1057
1058 mutex_unlock(&priv->mutex);
1059
1060 /*
1061 * Receiving all multicast frames is always enabled by the
1062 * default flags setup in iwl_connection_init_rx_config()
1063 * since we currently do not support programming multicast
1064 * filters into the device.
1065 */
1066 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1067 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1068 }
1069
iwlagn_mac_flush(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 queues,bool drop)1070 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1071 u32 queues, bool drop)
1072 {
1073 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1074 u32 scd_queues;
1075
1076 mutex_lock(&priv->mutex);
1077 IWL_DEBUG_MAC80211(priv, "enter\n");
1078
1079 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1080 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1081 goto done;
1082 }
1083 if (iwl_is_rfkill(priv)) {
1084 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1085 goto done;
1086 }
1087
1088 scd_queues = BIT(priv->trans->mac_cfg->base->num_of_queues) - 1;
1089 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1090 BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1091
1092 if (drop) {
1093 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1094 scd_queues);
1095 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1096 IWL_ERR(priv, "flush request fail\n");
1097 goto done;
1098 }
1099 }
1100
1101 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1102 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1103 done:
1104 mutex_unlock(&priv->mutex);
1105 IWL_DEBUG_MAC80211(priv, "leave\n");
1106 }
1107
iwlagn_mac_event_callback(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const struct ieee80211_event * event)1108 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1109 struct ieee80211_vif *vif,
1110 const struct ieee80211_event *event)
1111 {
1112 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1113
1114 if (event->type != RSSI_EVENT)
1115 return;
1116
1117 IWL_DEBUG_MAC80211(priv, "enter\n");
1118
1119 if (priv->lib->bt_params &&
1120 priv->lib->bt_params->advanced_bt_coexist) {
1121 if (event->u.rssi.data == RSSI_EVENT_LOW)
1122 priv->bt_enable_pspoll = true;
1123 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1124 priv->bt_enable_pspoll = false;
1125
1126 queue_work(priv->workqueue, &priv->bt_runtime_config);
1127 } else {
1128 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1129 "ignoring RSSI callback\n");
1130 }
1131
1132 IWL_DEBUG_MAC80211(priv, "leave\n");
1133 }
1134
iwlagn_mac_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)1135 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1136 struct ieee80211_sta *sta, bool set)
1137 {
1138 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1139
1140 queue_work(priv->workqueue, &priv->beacon_update);
1141
1142 return 0;
1143 }
1144
iwlagn_mac_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,unsigned int link_id,u16 queue,const struct ieee80211_tx_queue_params * params)1145 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1146 struct ieee80211_vif *vif,
1147 unsigned int link_id, u16 queue,
1148 const struct ieee80211_tx_queue_params *params)
1149 {
1150 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1151 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1152 struct iwl_rxon_context *ctx = vif_priv->ctx;
1153 int q;
1154
1155 if (WARN_ON(!ctx))
1156 return -EINVAL;
1157
1158 IWL_DEBUG_MAC80211(priv, "enter\n");
1159
1160 if (!iwl_is_ready_rf(priv)) {
1161 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1162 return -EIO;
1163 }
1164
1165 if (queue >= AC_NUM) {
1166 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1167 return 0;
1168 }
1169
1170 q = AC_NUM - 1 - queue;
1171
1172 mutex_lock(&priv->mutex);
1173
1174 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1175 cpu_to_le16(params->cw_min);
1176 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1177 cpu_to_le16(params->cw_max);
1178 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1179 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1180 cpu_to_le16((params->txop * 32));
1181
1182 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1183
1184 mutex_unlock(&priv->mutex);
1185
1186 IWL_DEBUG_MAC80211(priv, "leave\n");
1187 return 0;
1188 }
1189
iwlagn_mac_tx_last_beacon(struct ieee80211_hw * hw)1190 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1191 {
1192 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1193
1194 return priv->ibss_manager == IWL_IBSS_MANAGER;
1195 }
1196
iwl_set_mode(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1197 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1198 {
1199 iwl_connection_init_rx_config(priv, ctx);
1200
1201 iwlagn_set_rxon_chain(priv, ctx);
1202
1203 return iwlagn_commit_rxon(priv, ctx);
1204 }
1205
iwl_setup_interface(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1206 static int iwl_setup_interface(struct iwl_priv *priv,
1207 struct iwl_rxon_context *ctx)
1208 {
1209 struct ieee80211_vif *vif = ctx->vif;
1210 int err, ac;
1211
1212 lockdep_assert_held(&priv->mutex);
1213
1214 /*
1215 * This variable will be correct only when there's just
1216 * a single context, but all code using it is for hardware
1217 * that supports only one context.
1218 */
1219 priv->iw_mode = vif->type;
1220
1221 ctx->is_active = true;
1222
1223 err = iwl_set_mode(priv, ctx);
1224 if (err) {
1225 if (!ctx->always_active)
1226 ctx->is_active = false;
1227 return err;
1228 }
1229
1230 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1231 vif->type == NL80211_IFTYPE_ADHOC) {
1232 /*
1233 * pretend to have high BT traffic as long as we
1234 * are operating in IBSS mode, as this will cause
1235 * the rate scaling etc. to behave as intended.
1236 */
1237 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1238 }
1239
1240 /* set up queue mappings */
1241 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1242 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1243
1244 if (vif->type == NL80211_IFTYPE_AP)
1245 vif->cab_queue = ctx->mcast_queue;
1246 else
1247 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1248
1249 return 0;
1250 }
1251
iwlagn_mac_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1252 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1253 struct ieee80211_vif *vif)
1254 {
1255 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1256 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1257 struct iwl_rxon_context *tmp, *ctx = NULL;
1258 int err;
1259 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1260 bool reset = false;
1261
1262 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1263 viftype, vif->addr);
1264
1265 mutex_lock(&priv->mutex);
1266
1267 if (!iwl_is_ready_rf(priv)) {
1268 IWL_WARN(priv, "Try to add interface when device not ready\n");
1269 err = -EINVAL;
1270 goto out;
1271 }
1272
1273 for_each_context(priv, tmp) {
1274 u32 possible_modes =
1275 tmp->interface_modes | tmp->exclusive_interface_modes;
1276
1277 if (tmp->vif) {
1278 /* On reset we need to add the same interface again */
1279 if (tmp->vif == vif) {
1280 reset = true;
1281 ctx = tmp;
1282 break;
1283 }
1284
1285 /* check if this busy context is exclusive */
1286 if (tmp->exclusive_interface_modes &
1287 BIT(tmp->vif->type)) {
1288 err = -EINVAL;
1289 goto out;
1290 }
1291 continue;
1292 }
1293
1294 if (!(possible_modes & BIT(viftype)))
1295 continue;
1296
1297 /* have maybe usable context w/o interface */
1298 ctx = tmp;
1299 break;
1300 }
1301
1302 if (!ctx) {
1303 err = -EOPNOTSUPP;
1304 goto out;
1305 }
1306
1307 vif_priv->ctx = ctx;
1308 ctx->vif = vif;
1309
1310 /*
1311 * In SNIFFER device type, the firmware reports the FCS to
1312 * the host, rather than snipping it off. Unfortunately,
1313 * mac80211 doesn't (yet) provide a per-packet flag for
1314 * this, so that we have to set the hardware flag based
1315 * on the interfaces added. As the monitor interface can
1316 * only be present by itself, and will be removed before
1317 * other interfaces are added, this is safe.
1318 */
1319 if (vif->type == NL80211_IFTYPE_MONITOR)
1320 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1321 else
1322 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1323
1324 err = iwl_setup_interface(priv, ctx);
1325 if (!err || reset)
1326 goto out;
1327
1328 ctx->vif = NULL;
1329 priv->iw_mode = NL80211_IFTYPE_STATION;
1330 out:
1331 mutex_unlock(&priv->mutex);
1332
1333 IWL_DEBUG_MAC80211(priv, "leave\n");
1334 return err;
1335 }
1336
iwl_teardown_interface(struct iwl_priv * priv,struct ieee80211_vif * vif,bool mode_change)1337 static void iwl_teardown_interface(struct iwl_priv *priv,
1338 struct ieee80211_vif *vif,
1339 bool mode_change)
1340 {
1341 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1342
1343 lockdep_assert_held(&priv->mutex);
1344
1345 if (priv->scan_vif == vif) {
1346 iwl_scan_cancel_timeout(priv, 200);
1347 iwl_force_scan_end(priv);
1348 }
1349
1350 if (!mode_change) {
1351 iwl_set_mode(priv, ctx);
1352 if (!ctx->always_active)
1353 ctx->is_active = false;
1354 }
1355
1356 /*
1357 * When removing the IBSS interface, overwrite the
1358 * BT traffic load with the stored one from the last
1359 * notification, if any. If this is a device that
1360 * doesn't implement this, this has no effect since
1361 * both values are the same and zero.
1362 */
1363 if (vif->type == NL80211_IFTYPE_ADHOC)
1364 priv->bt_traffic_load = priv->last_bt_traffic_load;
1365 }
1366
iwlagn_mac_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1367 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1368 struct ieee80211_vif *vif)
1369 {
1370 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1371 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1372
1373 IWL_DEBUG_MAC80211(priv, "enter\n");
1374
1375 mutex_lock(&priv->mutex);
1376
1377 WARN_ON(ctx->vif != vif);
1378 ctx->vif = NULL;
1379
1380 iwl_teardown_interface(priv, vif, false);
1381
1382 mutex_unlock(&priv->mutex);
1383
1384 IWL_DEBUG_MAC80211(priv, "leave\n");
1385
1386 }
1387
iwlagn_mac_change_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_iftype newtype,bool newp2p)1388 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1389 struct ieee80211_vif *vif,
1390 enum nl80211_iftype newtype, bool newp2p)
1391 {
1392 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1393 struct iwl_rxon_context *ctx, *tmp;
1394 enum nl80211_iftype newviftype = newtype;
1395 u32 interface_modes;
1396 int err;
1397
1398 IWL_DEBUG_MAC80211(priv, "enter\n");
1399
1400 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1401
1402 mutex_lock(&priv->mutex);
1403
1404 ctx = iwl_rxon_ctx_from_vif(vif);
1405
1406 /*
1407 * To simplify this code, only support changes on the
1408 * BSS context. The PAN context is usually reassigned
1409 * by creating/removing P2P interfaces anyway.
1410 */
1411 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1412 err = -EBUSY;
1413 goto out;
1414 }
1415
1416 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1417 /*
1418 * Huh? But wait ... this can maybe happen when
1419 * we're in the middle of a firmware restart!
1420 */
1421 err = -EBUSY;
1422 goto out;
1423 }
1424
1425 /* Check if the switch is supported in the same context */
1426 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1427 if (!(interface_modes & BIT(newtype))) {
1428 err = -EBUSY;
1429 goto out;
1430 }
1431
1432 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1433 for_each_context(priv, tmp) {
1434 if (ctx == tmp)
1435 continue;
1436
1437 if (!tmp->is_active)
1438 continue;
1439
1440 /*
1441 * The current mode switch would be exclusive, but
1442 * another context is active ... refuse the switch.
1443 */
1444 err = -EBUSY;
1445 goto out;
1446 }
1447 }
1448
1449 /* success */
1450 iwl_teardown_interface(priv, vif, true);
1451 vif->type = newviftype;
1452 vif->p2p = newp2p;
1453 err = iwl_setup_interface(priv, ctx);
1454 WARN_ON(err);
1455 /*
1456 * We've switched internally, but submitting to the
1457 * device may have failed for some reason. Mask this
1458 * error, because otherwise mac80211 will not switch
1459 * (and set the interface type back) and we'll be
1460 * out of sync with it.
1461 */
1462 err = 0;
1463
1464 out:
1465 mutex_unlock(&priv->mutex);
1466 IWL_DEBUG_MAC80211(priv, "leave\n");
1467
1468 return err;
1469 }
1470
iwlagn_mac_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_scan_request * hw_req)1471 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1472 struct ieee80211_vif *vif,
1473 struct ieee80211_scan_request *hw_req)
1474 {
1475 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1476 struct cfg80211_scan_request *req = &hw_req->req;
1477 int ret;
1478
1479 IWL_DEBUG_MAC80211(priv, "enter\n");
1480
1481 if (req->n_channels == 0)
1482 return -EINVAL;
1483
1484 mutex_lock(&priv->mutex);
1485
1486 /*
1487 * If an internal scan is in progress, just set
1488 * up the scan_request as per above.
1489 */
1490 if (priv->scan_type != IWL_SCAN_NORMAL) {
1491 IWL_DEBUG_SCAN(priv,
1492 "SCAN request during internal scan - defer\n");
1493 priv->scan_request = req;
1494 priv->scan_vif = vif;
1495 ret = 0;
1496 } else {
1497 priv->scan_request = req;
1498 priv->scan_vif = vif;
1499 /*
1500 * mac80211 will only ask for one band at a time
1501 * so using channels[0] here is ok
1502 */
1503 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1504 req->channels[0]->band);
1505 if (ret) {
1506 priv->scan_request = NULL;
1507 priv->scan_vif = NULL;
1508 }
1509 }
1510
1511 IWL_DEBUG_MAC80211(priv, "leave\n");
1512
1513 mutex_unlock(&priv->mutex);
1514
1515 return ret;
1516 }
1517
iwl_sta_modify_ps_wake(struct iwl_priv * priv,int sta_id)1518 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1519 {
1520 struct iwl_addsta_cmd cmd = {
1521 .mode = STA_CONTROL_MODIFY_MSK,
1522 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1523 .sta.sta_id = sta_id,
1524 };
1525
1526 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1527 }
1528
iwlagn_mac_sta_notify(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum sta_notify_cmd cmd,struct ieee80211_sta * sta)1529 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1530 struct ieee80211_vif *vif,
1531 enum sta_notify_cmd cmd,
1532 struct ieee80211_sta *sta)
1533 {
1534 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1535 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1536 int sta_id;
1537
1538 IWL_DEBUG_MAC80211(priv, "enter\n");
1539
1540 switch (cmd) {
1541 case STA_NOTIFY_SLEEP:
1542 WARN_ON(!sta_priv->client);
1543 sta_priv->asleep = true;
1544 if (atomic_read(&sta_priv->pending_frames) > 0)
1545 ieee80211_sta_block_awake(hw, sta, true);
1546 break;
1547 case STA_NOTIFY_AWAKE:
1548 WARN_ON(!sta_priv->client);
1549 if (!sta_priv->asleep)
1550 break;
1551 sta_priv->asleep = false;
1552 sta_id = iwl_sta_id(sta);
1553 if (sta_id != IWL_INVALID_STATION)
1554 iwl_sta_modify_ps_wake(priv, sta_id);
1555 break;
1556 default:
1557 break;
1558 }
1559 IWL_DEBUG_MAC80211(priv, "leave\n");
1560 }
1561
1562 static void
iwlagn_mac_reconfig_complete(struct ieee80211_hw * hw,enum ieee80211_reconfig_type reconfig_type)1563 iwlagn_mac_reconfig_complete(struct ieee80211_hw *hw,
1564 enum ieee80211_reconfig_type reconfig_type)
1565 {
1566 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1567
1568 if (reconfig_type == IEEE80211_RECONFIG_TYPE_RESTART)
1569 iwl_trans_finish_sw_reset(priv->trans);
1570 }
1571
1572 const struct ieee80211_ops iwlagn_hw_ops = {
1573 .add_chanctx = ieee80211_emulate_add_chanctx,
1574 .remove_chanctx = ieee80211_emulate_remove_chanctx,
1575 .change_chanctx = ieee80211_emulate_change_chanctx,
1576 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
1577 .tx = iwlagn_mac_tx,
1578 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
1579 .start = iwlagn_mac_start,
1580 .stop = iwlagn_mac_stop,
1581 #ifdef CONFIG_PM_SLEEP
1582 .suspend = iwlagn_mac_suspend,
1583 .resume = iwlagn_mac_resume,
1584 .set_wakeup = iwlagn_mac_set_wakeup,
1585 #endif
1586 .add_interface = iwlagn_mac_add_interface,
1587 .remove_interface = iwlagn_mac_remove_interface,
1588 .change_interface = iwlagn_mac_change_interface,
1589 .config = iwlagn_mac_config,
1590 .configure_filter = iwlagn_configure_filter,
1591 .set_key = iwlagn_mac_set_key,
1592 .update_tkip_key = iwlagn_mac_update_tkip_key,
1593 .set_rekey_data = iwlagn_mac_set_rekey_data,
1594 .conf_tx = iwlagn_mac_conf_tx,
1595 .bss_info_changed = iwlagn_bss_info_changed,
1596 .ampdu_action = iwlagn_mac_ampdu_action,
1597 .hw_scan = iwlagn_mac_hw_scan,
1598 .sta_notify = iwlagn_mac_sta_notify,
1599 .sta_state = iwlagn_mac_sta_state,
1600 .channel_switch = iwlagn_mac_channel_switch,
1601 .flush = iwlagn_mac_flush,
1602 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1603 .event_callback = iwlagn_mac_event_callback,
1604 .set_tim = iwlagn_mac_set_tim,
1605 .reconfig_complete = iwlagn_mac_reconfig_complete,
1606 };
1607
1608 /* This function both allocates and initializes hw and priv. */
iwl_alloc_all(void)1609 struct ieee80211_hw *iwl_alloc_all(void)
1610 {
1611 struct iwl_priv *priv;
1612 struct iwl_op_mode *op_mode;
1613 /* mac80211 allocates memory for this device instance, including
1614 * space for this driver's private structure */
1615 struct ieee80211_hw *hw;
1616
1617 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1618 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1619 if (!hw)
1620 goto out;
1621
1622 op_mode = hw->priv;
1623 priv = IWL_OP_MODE_GET_DVM(op_mode);
1624 priv->hw = hw;
1625
1626 out:
1627 return hw;
1628 }
1629