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 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->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 priv->trans->ops->d3_suspend &&
149 priv->trans->ops->d3_resume &&
150 device_can_wakeup(priv->trans->dev)) {
151 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
152 WIPHY_WOWLAN_DISCONNECT |
153 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
154 WIPHY_WOWLAN_RFKILL_RELEASE;
155 if (!iwlwifi_mod_params.swcrypto)
156 priv->wowlan_support.flags |=
157 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
158 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
159
160 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
161 priv->wowlan_support.pattern_min_len =
162 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
163 priv->wowlan_support.pattern_max_len =
164 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
165 hw->wiphy->wowlan = &priv->wowlan_support;
166 }
167 #endif
168
169 if (iwlwifi_mod_params.power_save)
170 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
171 else
172 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
173
174 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
175 /* we create the 802.11 header and a max-length SSID element */
176 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
177
178 /*
179 * We don't use all queues: 4 and 9 are unused and any
180 * aggregation queue gets mapped down to the AC queue.
181 */
182 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
183
184 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
185
186 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
187 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
188 &priv->nvm_data->bands[NL80211_BAND_2GHZ];
189 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
190 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
191 &priv->nvm_data->bands[NL80211_BAND_5GHZ];
192
193 hw->wiphy->hw_version = priv->trans->hw_id;
194
195 iwl_leds_init(priv);
196
197 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
198 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_EXT_KEY_ID);
199
200 ret = ieee80211_register_hw(priv->hw);
201 if (ret) {
202 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
203 iwl_leds_exit(priv);
204 return ret;
205 }
206 priv->mac80211_registered = 1;
207
208 return 0;
209 }
210
iwlagn_mac_unregister(struct iwl_priv * priv)211 void iwlagn_mac_unregister(struct iwl_priv *priv)
212 {
213 if (!priv->mac80211_registered)
214 return;
215 iwl_leds_exit(priv);
216 ieee80211_unregister_hw(priv->hw);
217 priv->mac80211_registered = 0;
218 }
219
__iwl_up(struct iwl_priv * priv)220 static int __iwl_up(struct iwl_priv *priv)
221 {
222 struct iwl_rxon_context *ctx;
223 int ret;
224
225 lockdep_assert_held(&priv->mutex);
226
227 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
228 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
229 return -EIO;
230 }
231
232 for_each_context(priv, ctx) {
233 ret = iwlagn_alloc_bcast_station(priv, ctx);
234 if (ret) {
235 iwl_dealloc_bcast_stations(priv);
236 return ret;
237 }
238 }
239
240 ret = iwl_trans_start_hw(priv->trans);
241 if (ret) {
242 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
243 goto error;
244 }
245
246 ret = iwl_run_init_ucode(priv);
247 if (ret) {
248 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
249 goto error;
250 }
251
252 ret = iwl_trans_start_hw(priv->trans);
253 if (ret) {
254 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
255 goto error;
256 }
257
258 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
259 if (ret) {
260 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
261 goto error;
262 }
263
264 ret = iwl_alive_start(priv);
265 if (ret)
266 goto error;
267 return 0;
268
269 error:
270 set_bit(STATUS_EXIT_PENDING, &priv->status);
271 iwl_down(priv);
272 clear_bit(STATUS_EXIT_PENDING, &priv->status);
273
274 IWL_ERR(priv, "Unable to initialize device.\n");
275 return ret;
276 }
277
iwlagn_mac_start(struct ieee80211_hw * hw)278 static int iwlagn_mac_start(struct ieee80211_hw *hw)
279 {
280 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
281 int ret;
282
283 IWL_DEBUG_MAC80211(priv, "enter\n");
284
285 /* we should be verifying the device is ready to be opened */
286 mutex_lock(&priv->mutex);
287 ret = __iwl_up(priv);
288 mutex_unlock(&priv->mutex);
289 if (ret)
290 return ret;
291
292 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
293
294 /* Now we should be done, and the READY bit should be set. */
295 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
296 ret = -EIO;
297
298 iwlagn_led_enable(priv);
299
300 priv->is_open = 1;
301 IWL_DEBUG_MAC80211(priv, "leave\n");
302 return ret;
303 }
304
iwlagn_mac_stop(struct ieee80211_hw * hw)305 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
306 {
307 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
308
309 IWL_DEBUG_MAC80211(priv, "enter\n");
310
311 if (!priv->is_open)
312 return;
313
314 priv->is_open = 0;
315
316 mutex_lock(&priv->mutex);
317 iwl_down(priv);
318 mutex_unlock(&priv->mutex);
319
320 iwl_cancel_deferred_work(priv);
321
322 flush_workqueue(priv->workqueue);
323
324 IWL_DEBUG_MAC80211(priv, "leave\n");
325 }
326
iwlagn_mac_set_rekey_data(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct cfg80211_gtk_rekey_data * data)327 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
328 struct ieee80211_vif *vif,
329 struct cfg80211_gtk_rekey_data *data)
330 {
331 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
332
333 if (iwlwifi_mod_params.swcrypto)
334 return;
335
336 IWL_DEBUG_MAC80211(priv, "enter\n");
337 mutex_lock(&priv->mutex);
338
339 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
340 goto out;
341
342 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
343 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
344 priv->replay_ctr =
345 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
346 priv->have_rekey_data = true;
347
348 out:
349 mutex_unlock(&priv->mutex);
350 IWL_DEBUG_MAC80211(priv, "leave\n");
351 }
352
353 #ifdef CONFIG_PM_SLEEP
354
iwlagn_mac_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)355 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
356 struct cfg80211_wowlan *wowlan)
357 {
358 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
359 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
360 int ret;
361
362 if (WARN_ON(!wowlan))
363 return -EINVAL;
364
365 IWL_DEBUG_MAC80211(priv, "enter\n");
366 mutex_lock(&priv->mutex);
367
368 /* Don't attempt WoWLAN when not associated, tear down instead. */
369 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
370 !iwl_is_associated_ctx(ctx)) {
371 ret = 1;
372 goto out;
373 }
374
375 ret = iwlagn_suspend(priv, wowlan);
376 if (ret)
377 goto error;
378
379 /* let the ucode operate on its own */
380 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
381 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
382
383 iwl_trans_d3_suspend(priv->trans, false, true);
384
385 goto out;
386
387 error:
388 priv->wowlan = false;
389 iwlagn_prepare_restart(priv);
390 ieee80211_restart_hw(priv->hw);
391 out:
392 mutex_unlock(&priv->mutex);
393 IWL_DEBUG_MAC80211(priv, "leave\n");
394
395 return ret;
396 }
397
398 struct iwl_resume_data {
399 struct iwl_priv *priv;
400 struct iwlagn_wowlan_status *cmd;
401 bool valid;
402 };
403
iwl_resume_status_fn(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)404 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
405 struct iwl_rx_packet *pkt, void *data)
406 {
407 struct iwl_resume_data *resume_data = data;
408 struct iwl_priv *priv = resume_data->priv;
409
410 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
411 IWL_ERR(priv, "rx wrong size data\n");
412 return true;
413 }
414 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
415 resume_data->valid = true;
416
417 return true;
418 }
419
iwlagn_mac_resume(struct ieee80211_hw * hw)420 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
421 {
422 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
423 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
424 struct ieee80211_vif *vif;
425 u32 base;
426 int ret;
427 enum iwl_d3_status d3_status;
428 struct error_table_start {
429 /* cf. struct iwl_error_event_table */
430 u32 valid;
431 u32 error_id;
432 } err_info;
433 struct iwl_notification_wait status_wait;
434 static const u16 status_cmd[] = {
435 REPLY_WOWLAN_GET_STATUS,
436 };
437 struct iwlagn_wowlan_status status_data = {};
438 struct iwl_resume_data resume_data = {
439 .priv = priv,
440 .cmd = &status_data,
441 .valid = false,
442 };
443 struct cfg80211_wowlan_wakeup wakeup = {
444 .pattern_idx = -1,
445 };
446 #ifdef CONFIG_IWLWIFI_DEBUGFS
447 const struct fw_img *img;
448 #endif
449
450 IWL_DEBUG_MAC80211(priv, "enter\n");
451 mutex_lock(&priv->mutex);
452
453 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
454 vif = ctx->vif;
455
456 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
457 if (ret)
458 goto out_unlock;
459
460 if (d3_status != IWL_D3_STATUS_ALIVE) {
461 IWL_INFO(priv, "Device was reset during suspend\n");
462 goto out_unlock;
463 }
464
465 /* uCode is no longer operating by itself */
466 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
467 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
468
469 base = priv->device_pointers.error_event_table;
470 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
471 IWL_WARN(priv, "Invalid error table during resume!\n");
472 goto out_unlock;
473 }
474
475 iwl_trans_read_mem_bytes(priv->trans, base,
476 &err_info, sizeof(err_info));
477
478 if (err_info.valid) {
479 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
480 err_info.valid, err_info.error_id);
481 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
482 wakeup.rfkill_release = true;
483 ieee80211_report_wowlan_wakeup(vif, &wakeup,
484 GFP_KERNEL);
485 }
486 goto out_unlock;
487 }
488
489 #ifdef CONFIG_IWLWIFI_DEBUGFS
490 img = &priv->fw->img[IWL_UCODE_WOWLAN];
491 if (!priv->wowlan_sram)
492 priv->wowlan_sram =
493 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
494 GFP_KERNEL);
495
496 if (priv->wowlan_sram)
497 iwl_trans_read_mem(priv->trans, 0x800000,
498 priv->wowlan_sram,
499 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
500 #endif
501
502 /*
503 * This is very strange. The GET_STATUS command is sent but the device
504 * doesn't reply properly, it seems it doesn't close the RBD so one is
505 * always left open ... As a result, we need to send another command
506 * and have to reset the driver afterwards. As we need to switch to
507 * runtime firmware again that'll happen.
508 */
509
510 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
511 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
512 &resume_data);
513
514 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
515 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
516 /* an RBD is left open in the firmware now! */
517
518 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
519 if (ret)
520 goto out_unlock;
521
522 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
523 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
524 struct cfg80211_wowlan_wakeup *wakeup_report;
525
526 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
527
528 if (reasons) {
529 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
530 wakeup.magic_pkt = true;
531 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
532 wakeup.pattern_idx = status_data.pattern_number;
533 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
534 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
535 wakeup.disconnect = true;
536 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
537 wakeup.gtk_rekey_failure = true;
538 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
539 wakeup.eap_identity_req = true;
540 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
541 wakeup.four_way_handshake = true;
542 wakeup_report = &wakeup;
543 } else {
544 wakeup_report = NULL;
545 }
546
547 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
548 }
549
550 priv->wowlan = false;
551
552 iwlagn_prepare_restart(priv);
553
554 memset((void *)&ctx->active, 0, sizeof(ctx->active));
555 iwl_connection_init_rx_config(priv, ctx);
556 iwlagn_set_rxon_chain(priv, ctx);
557
558 out_unlock:
559 mutex_unlock(&priv->mutex);
560 IWL_DEBUG_MAC80211(priv, "leave\n");
561
562 ieee80211_resume_disconnect(vif);
563
564 return 1;
565 }
566
iwlagn_mac_set_wakeup(struct ieee80211_hw * hw,bool enabled)567 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
568 {
569 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
570
571 device_set_wakeup_enable(priv->trans->dev, enabled);
572 }
573 #endif
574
iwlagn_mac_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)575 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
576 struct ieee80211_tx_control *control,
577 struct sk_buff *skb)
578 {
579 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
580
581 if (iwlagn_tx_skb(priv, control->sta, skb))
582 ieee80211_free_txskb(hw, skb);
583 }
584
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)585 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
586 struct ieee80211_vif *vif,
587 struct ieee80211_key_conf *keyconf,
588 struct ieee80211_sta *sta,
589 u32 iv32, u16 *phase1key)
590 {
591 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
592
593 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
594 }
595
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)596 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
597 struct ieee80211_vif *vif,
598 struct ieee80211_sta *sta,
599 struct ieee80211_key_conf *key)
600 {
601 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
602 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
603 struct iwl_rxon_context *ctx = vif_priv->ctx;
604 int ret;
605 bool is_default_wep_key = false;
606
607 IWL_DEBUG_MAC80211(priv, "enter\n");
608
609 if (iwlwifi_mod_params.swcrypto) {
610 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
611 return -EOPNOTSUPP;
612 }
613
614 switch (key->cipher) {
615 case WLAN_CIPHER_SUITE_TKIP:
616 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
617 fallthrough;
618 case WLAN_CIPHER_SUITE_CCMP:
619 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
620 break;
621 default:
622 break;
623 }
624
625 /*
626 * We could program these keys into the hardware as well, but we
627 * don't expect much multicast traffic in IBSS and having keys
628 * for more stations is probably more useful.
629 *
630 * Mark key TX-only and return 0.
631 */
632 if (vif->type == NL80211_IFTYPE_ADHOC &&
633 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
634 key->hw_key_idx = WEP_INVALID_OFFSET;
635 return 0;
636 }
637
638 /* If they key was TX-only, accept deletion */
639 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
640 return 0;
641
642 mutex_lock(&priv->mutex);
643 iwl_scan_cancel_timeout(priv, 100);
644
645 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
646
647 /*
648 * If we are getting WEP group key and we didn't receive any key mapping
649 * so far, we are in legacy wep mode (group key only), otherwise we are
650 * in 1X mode.
651 * In legacy wep mode, we use another host command to the uCode.
652 */
653 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
654 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
655 if (cmd == SET_KEY)
656 is_default_wep_key = !ctx->key_mapping_keys;
657 else
658 is_default_wep_key =
659 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
660 }
661
662
663 switch (cmd) {
664 case SET_KEY:
665 if (is_default_wep_key) {
666 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
667 break;
668 }
669 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
670 if (ret) {
671 /*
672 * can't add key for RX, but we don't need it
673 * in the device for TX so still return 0
674 */
675 ret = 0;
676 key->hw_key_idx = WEP_INVALID_OFFSET;
677 }
678
679 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
680 break;
681 case DISABLE_KEY:
682 if (is_default_wep_key)
683 ret = iwl_remove_default_wep_key(priv, ctx, key);
684 else
685 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
686
687 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
688 break;
689 default:
690 ret = -EINVAL;
691 }
692
693 mutex_unlock(&priv->mutex);
694 IWL_DEBUG_MAC80211(priv, "leave\n");
695
696 return ret;
697 }
698
iwlagn_mac_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)699 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
700 struct ieee80211_vif *vif,
701 struct ieee80211_ampdu_params *params)
702 {
703 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
704 int ret = -EINVAL;
705 struct ieee80211_sta *sta = params->sta;
706 enum ieee80211_ampdu_mlme_action action = params->action;
707 u16 tid = params->tid;
708 u16 *ssn = ¶ms->ssn;
709 u8 buf_size = params->buf_size;
710 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
711
712 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
713 sta->addr, tid);
714
715 if (!(priv->nvm_data->sku_cap_11n_enable))
716 return -EACCES;
717
718 IWL_DEBUG_MAC80211(priv, "enter\n");
719 mutex_lock(&priv->mutex);
720
721 switch (action) {
722 case IEEE80211_AMPDU_RX_START:
723 if (!iwl_enable_rx_ampdu())
724 break;
725 IWL_DEBUG_HT(priv, "start Rx\n");
726 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
727 break;
728 case IEEE80211_AMPDU_RX_STOP:
729 IWL_DEBUG_HT(priv, "stop Rx\n");
730 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
731 break;
732 case IEEE80211_AMPDU_TX_START:
733 if (!priv->trans->ops->txq_enable)
734 break;
735 if (!iwl_enable_tx_ampdu())
736 break;
737 IWL_DEBUG_HT(priv, "start Tx\n");
738 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
739 break;
740 case IEEE80211_AMPDU_TX_STOP_FLUSH:
741 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
742 IWL_DEBUG_HT(priv, "Flush Tx\n");
743 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
744 break;
745 case IEEE80211_AMPDU_TX_STOP_CONT:
746 IWL_DEBUG_HT(priv, "stop Tx\n");
747 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
748 if ((ret == 0) && (priv->agg_tids_count > 0)) {
749 priv->agg_tids_count--;
750 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
751 priv->agg_tids_count);
752 }
753 if (!priv->agg_tids_count &&
754 priv->hw_params.use_rts_for_aggregation) {
755 /*
756 * switch off RTS/CTS if it was previously enabled
757 */
758 sta_priv->lq_sta.lq.general_params.flags &=
759 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
760 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
761 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
762 }
763 break;
764 case IEEE80211_AMPDU_TX_OPERATIONAL:
765 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
766 break;
767 }
768 mutex_unlock(&priv->mutex);
769 IWL_DEBUG_MAC80211(priv, "leave\n");
770 return ret;
771 }
772
iwlagn_mac_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)773 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
774 struct ieee80211_vif *vif,
775 struct ieee80211_sta *sta)
776 {
777 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
778 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
779 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
780 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
781 int ret;
782 u8 sta_id;
783
784 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
785 sta->addr);
786 sta_priv->sta_id = IWL_INVALID_STATION;
787
788 atomic_set(&sta_priv->pending_frames, 0);
789 if (vif->type == NL80211_IFTYPE_AP)
790 sta_priv->client = true;
791
792 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
793 is_ap, sta, &sta_id);
794 if (ret) {
795 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
796 sta->addr, ret);
797 /* Should we return success if return code is EEXIST ? */
798 return ret;
799 }
800
801 sta_priv->sta_id = sta_id;
802
803 return 0;
804 }
805
iwlagn_mac_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)806 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
807 struct ieee80211_vif *vif,
808 struct ieee80211_sta *sta)
809 {
810 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
811 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
812 int ret;
813
814 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
815
816 if (vif->type == NL80211_IFTYPE_STATION) {
817 /*
818 * Station will be removed from device when the RXON
819 * is set to unassociated -- just deactivate it here
820 * to avoid re-programming it.
821 */
822 ret = 0;
823 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
824 } else {
825 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
826 if (ret)
827 IWL_DEBUG_QUIET_RFKILL(priv,
828 "Error removing station %pM\n", sta->addr);
829 }
830 return ret;
831 }
832
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)833 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
834 struct ieee80211_vif *vif,
835 struct ieee80211_sta *sta,
836 enum ieee80211_sta_state old_state,
837 enum ieee80211_sta_state new_state)
838 {
839 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
840 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
841 enum {
842 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
843 } op = NONE;
844 int ret;
845
846 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
847 sta->addr, old_state, new_state);
848
849 mutex_lock(&priv->mutex);
850 if (vif->type == NL80211_IFTYPE_STATION) {
851 if (old_state == IEEE80211_STA_NOTEXIST &&
852 new_state == IEEE80211_STA_NONE)
853 op = ADD;
854 else if (old_state == IEEE80211_STA_NONE &&
855 new_state == IEEE80211_STA_NOTEXIST)
856 op = REMOVE;
857 else if (old_state == IEEE80211_STA_AUTH &&
858 new_state == IEEE80211_STA_ASSOC)
859 op = HT_RATE_INIT;
860 } else {
861 if (old_state == IEEE80211_STA_AUTH &&
862 new_state == IEEE80211_STA_ASSOC)
863 op = ADD_RATE_INIT;
864 else if (old_state == IEEE80211_STA_ASSOC &&
865 new_state == IEEE80211_STA_AUTH)
866 op = REMOVE;
867 }
868
869 switch (op) {
870 case ADD:
871 ret = iwlagn_mac_sta_add(hw, vif, sta);
872 if (ret)
873 break;
874 /*
875 * Clear the in-progress flag, the AP station entry was added
876 * but we'll initialize LQ only when we've associated (which
877 * would also clear the in-progress flag). This is necessary
878 * in case we never initialize LQ because association fails.
879 */
880 spin_lock_bh(&priv->sta_lock);
881 priv->stations[iwl_sta_id(sta)].used &=
882 ~IWL_STA_UCODE_INPROGRESS;
883 spin_unlock_bh(&priv->sta_lock);
884 break;
885 case REMOVE:
886 ret = iwlagn_mac_sta_remove(hw, vif, sta);
887 break;
888 case ADD_RATE_INIT:
889 ret = iwlagn_mac_sta_add(hw, vif, sta);
890 if (ret)
891 break;
892 /* Initialize rate scaling */
893 IWL_DEBUG_INFO(priv,
894 "Initializing rate scaling for station %pM\n",
895 sta->addr);
896 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
897 ret = 0;
898 break;
899 case HT_RATE_INIT:
900 /* Initialize rate scaling */
901 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
902 if (ret)
903 break;
904 IWL_DEBUG_INFO(priv,
905 "Initializing rate scaling for station %pM\n",
906 sta->addr);
907 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
908 ret = 0;
909 break;
910 default:
911 ret = 0;
912 break;
913 }
914
915 /*
916 * mac80211 might WARN if we fail, but due the way we
917 * (badly) handle hard rfkill, we might fail here
918 */
919 if (iwl_is_rfkill(priv))
920 ret = 0;
921
922 mutex_unlock(&priv->mutex);
923 IWL_DEBUG_MAC80211(priv, "leave\n");
924
925 return ret;
926 }
927
iwlagn_mac_channel_switch(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_channel_switch * ch_switch)928 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
929 struct ieee80211_vif *vif,
930 struct ieee80211_channel_switch *ch_switch)
931 {
932 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
933 struct ieee80211_conf *conf = &hw->conf;
934 struct ieee80211_channel *channel = ch_switch->chandef.chan;
935 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
936 /*
937 * MULTI-FIXME
938 * When we add support for multiple interfaces, we need to
939 * revisit this. The channel switch command in the device
940 * only affects the BSS context, but what does that really
941 * mean? And what if we get a CSA on the second interface?
942 * This needs a lot of work.
943 */
944 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
945 u16 ch;
946
947 IWL_DEBUG_MAC80211(priv, "enter\n");
948
949 mutex_lock(&priv->mutex);
950
951 if (iwl_is_rfkill(priv))
952 goto out;
953
954 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
955 test_bit(STATUS_SCANNING, &priv->status) ||
956 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
957 goto out;
958
959 if (!iwl_is_associated_ctx(ctx))
960 goto out;
961
962 if (!priv->lib->set_channel_switch)
963 goto out;
964
965 ch = channel->hw_value;
966 if (le16_to_cpu(ctx->active.channel) == ch)
967 goto out;
968
969 priv->current_ht_config.smps = conf->smps_mode;
970
971 /* Configure HT40 channels */
972 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
973 case NL80211_CHAN_NO_HT:
974 case NL80211_CHAN_HT20:
975 ctx->ht.is_40mhz = false;
976 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
977 break;
978 case NL80211_CHAN_HT40MINUS:
979 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
980 ctx->ht.is_40mhz = true;
981 break;
982 case NL80211_CHAN_HT40PLUS:
983 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
984 ctx->ht.is_40mhz = true;
985 break;
986 }
987
988 if ((le16_to_cpu(ctx->staging.channel) != ch))
989 ctx->staging.flags = 0;
990
991 iwl_set_rxon_channel(priv, channel, ctx);
992 iwl_set_rxon_ht(priv, ht_conf);
993 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
994
995 /*
996 * at this point, staging_rxon has the
997 * configuration for channel switch
998 */
999 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1000 priv->switch_channel = cpu_to_le16(ch);
1001 if (priv->lib->set_channel_switch(priv, ch_switch)) {
1002 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1003 priv->switch_channel = 0;
1004 ieee80211_chswitch_done(ctx->vif, false);
1005 }
1006
1007 out:
1008 mutex_unlock(&priv->mutex);
1009 IWL_DEBUG_MAC80211(priv, "leave\n");
1010 }
1011
iwl_chswitch_done(struct iwl_priv * priv,bool is_success)1012 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1013 {
1014 /*
1015 * MULTI-FIXME
1016 * See iwlagn_mac_channel_switch.
1017 */
1018 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1019
1020 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1021 return;
1022
1023 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1024 return;
1025
1026 if (ctx->vif)
1027 ieee80211_chswitch_done(ctx->vif, is_success);
1028 }
1029
iwlagn_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)1030 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1031 unsigned int changed_flags,
1032 unsigned int *total_flags,
1033 u64 multicast)
1034 {
1035 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1036 __le32 filter_or = 0, filter_nand = 0;
1037 struct iwl_rxon_context *ctx;
1038
1039 #define CHK(test, flag) do { \
1040 if (*total_flags & (test)) \
1041 filter_or |= (flag); \
1042 else \
1043 filter_nand |= (flag); \
1044 } while (0)
1045
1046 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1047 changed_flags, *total_flags);
1048
1049 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1050 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1051 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1052 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1053
1054 #undef CHK
1055
1056 mutex_lock(&priv->mutex);
1057
1058 for_each_context(priv, ctx) {
1059 ctx->staging.filter_flags &= ~filter_nand;
1060 ctx->staging.filter_flags |= filter_or;
1061
1062 /*
1063 * Not committing directly because hardware can perform a scan,
1064 * but we'll eventually commit the filter flags change anyway.
1065 */
1066 }
1067
1068 mutex_unlock(&priv->mutex);
1069
1070 /*
1071 * Receiving all multicast frames is always enabled by the
1072 * default flags setup in iwl_connection_init_rx_config()
1073 * since we currently do not support programming multicast
1074 * filters into the device.
1075 */
1076 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1077 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1078 }
1079
iwlagn_mac_flush(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 queues,bool drop)1080 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1081 u32 queues, bool drop)
1082 {
1083 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1084 u32 scd_queues;
1085
1086 mutex_lock(&priv->mutex);
1087 IWL_DEBUG_MAC80211(priv, "enter\n");
1088
1089 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1090 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1091 goto done;
1092 }
1093 if (iwl_is_rfkill(priv)) {
1094 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1095 goto done;
1096 }
1097
1098 scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1;
1099 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1100 BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1101
1102 if (drop) {
1103 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1104 scd_queues);
1105 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1106 IWL_ERR(priv, "flush request fail\n");
1107 goto done;
1108 }
1109 }
1110
1111 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1112 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1113 done:
1114 mutex_unlock(&priv->mutex);
1115 IWL_DEBUG_MAC80211(priv, "leave\n");
1116 }
1117
iwlagn_mac_event_callback(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const struct ieee80211_event * event)1118 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1119 struct ieee80211_vif *vif,
1120 const struct ieee80211_event *event)
1121 {
1122 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1123
1124 if (event->type != RSSI_EVENT)
1125 return;
1126
1127 IWL_DEBUG_MAC80211(priv, "enter\n");
1128
1129 if (priv->lib->bt_params &&
1130 priv->lib->bt_params->advanced_bt_coexist) {
1131 if (event->u.rssi.data == RSSI_EVENT_LOW)
1132 priv->bt_enable_pspoll = true;
1133 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1134 priv->bt_enable_pspoll = false;
1135
1136 queue_work(priv->workqueue, &priv->bt_runtime_config);
1137 } else {
1138 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1139 "ignoring RSSI callback\n");
1140 }
1141
1142 IWL_DEBUG_MAC80211(priv, "leave\n");
1143 }
1144
iwlagn_mac_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)1145 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1146 struct ieee80211_sta *sta, bool set)
1147 {
1148 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1149
1150 queue_work(priv->workqueue, &priv->beacon_update);
1151
1152 return 0;
1153 }
1154
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)1155 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1156 struct ieee80211_vif *vif,
1157 unsigned int link_id, u16 queue,
1158 const struct ieee80211_tx_queue_params *params)
1159 {
1160 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1161 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1162 struct iwl_rxon_context *ctx = vif_priv->ctx;
1163 int q;
1164
1165 if (WARN_ON(!ctx))
1166 return -EINVAL;
1167
1168 IWL_DEBUG_MAC80211(priv, "enter\n");
1169
1170 if (!iwl_is_ready_rf(priv)) {
1171 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1172 return -EIO;
1173 }
1174
1175 if (queue >= AC_NUM) {
1176 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1177 return 0;
1178 }
1179
1180 q = AC_NUM - 1 - queue;
1181
1182 mutex_lock(&priv->mutex);
1183
1184 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1185 cpu_to_le16(params->cw_min);
1186 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1187 cpu_to_le16(params->cw_max);
1188 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1189 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1190 cpu_to_le16((params->txop * 32));
1191
1192 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1193
1194 mutex_unlock(&priv->mutex);
1195
1196 IWL_DEBUG_MAC80211(priv, "leave\n");
1197 return 0;
1198 }
1199
iwlagn_mac_tx_last_beacon(struct ieee80211_hw * hw)1200 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1201 {
1202 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1203
1204 return priv->ibss_manager == IWL_IBSS_MANAGER;
1205 }
1206
iwl_set_mode(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1207 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1208 {
1209 iwl_connection_init_rx_config(priv, ctx);
1210
1211 iwlagn_set_rxon_chain(priv, ctx);
1212
1213 return iwlagn_commit_rxon(priv, ctx);
1214 }
1215
iwl_setup_interface(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1216 static int iwl_setup_interface(struct iwl_priv *priv,
1217 struct iwl_rxon_context *ctx)
1218 {
1219 struct ieee80211_vif *vif = ctx->vif;
1220 int err, ac;
1221
1222 lockdep_assert_held(&priv->mutex);
1223
1224 /*
1225 * This variable will be correct only when there's just
1226 * a single context, but all code using it is for hardware
1227 * that supports only one context.
1228 */
1229 priv->iw_mode = vif->type;
1230
1231 ctx->is_active = true;
1232
1233 err = iwl_set_mode(priv, ctx);
1234 if (err) {
1235 if (!ctx->always_active)
1236 ctx->is_active = false;
1237 return err;
1238 }
1239
1240 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1241 vif->type == NL80211_IFTYPE_ADHOC) {
1242 /*
1243 * pretend to have high BT traffic as long as we
1244 * are operating in IBSS mode, as this will cause
1245 * the rate scaling etc. to behave as intended.
1246 */
1247 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1248 }
1249
1250 /* set up queue mappings */
1251 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1252 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1253
1254 if (vif->type == NL80211_IFTYPE_AP)
1255 vif->cab_queue = ctx->mcast_queue;
1256 else
1257 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1258
1259 return 0;
1260 }
1261
iwlagn_mac_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1262 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1263 struct ieee80211_vif *vif)
1264 {
1265 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1266 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1267 struct iwl_rxon_context *tmp, *ctx = NULL;
1268 int err;
1269 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1270 bool reset = false;
1271
1272 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1273 viftype, vif->addr);
1274
1275 mutex_lock(&priv->mutex);
1276
1277 if (!iwl_is_ready_rf(priv)) {
1278 IWL_WARN(priv, "Try to add interface when device not ready\n");
1279 err = -EINVAL;
1280 goto out;
1281 }
1282
1283 for_each_context(priv, tmp) {
1284 u32 possible_modes =
1285 tmp->interface_modes | tmp->exclusive_interface_modes;
1286
1287 if (tmp->vif) {
1288 /* On reset we need to add the same interface again */
1289 if (tmp->vif == vif) {
1290 reset = true;
1291 ctx = tmp;
1292 break;
1293 }
1294
1295 /* check if this busy context is exclusive */
1296 if (tmp->exclusive_interface_modes &
1297 BIT(tmp->vif->type)) {
1298 err = -EINVAL;
1299 goto out;
1300 }
1301 continue;
1302 }
1303
1304 if (!(possible_modes & BIT(viftype)))
1305 continue;
1306
1307 /* have maybe usable context w/o interface */
1308 ctx = tmp;
1309 break;
1310 }
1311
1312 if (!ctx) {
1313 err = -EOPNOTSUPP;
1314 goto out;
1315 }
1316
1317 vif_priv->ctx = ctx;
1318 ctx->vif = vif;
1319
1320 /*
1321 * In SNIFFER device type, the firmware reports the FCS to
1322 * the host, rather than snipping it off. Unfortunately,
1323 * mac80211 doesn't (yet) provide a per-packet flag for
1324 * this, so that we have to set the hardware flag based
1325 * on the interfaces added. As the monitor interface can
1326 * only be present by itself, and will be removed before
1327 * other interfaces are added, this is safe.
1328 */
1329 if (vif->type == NL80211_IFTYPE_MONITOR)
1330 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1331 else
1332 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1333
1334 err = iwl_setup_interface(priv, ctx);
1335 if (!err || reset)
1336 goto out;
1337
1338 ctx->vif = NULL;
1339 priv->iw_mode = NL80211_IFTYPE_STATION;
1340 out:
1341 mutex_unlock(&priv->mutex);
1342
1343 IWL_DEBUG_MAC80211(priv, "leave\n");
1344 return err;
1345 }
1346
iwl_teardown_interface(struct iwl_priv * priv,struct ieee80211_vif * vif,bool mode_change)1347 static void iwl_teardown_interface(struct iwl_priv *priv,
1348 struct ieee80211_vif *vif,
1349 bool mode_change)
1350 {
1351 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1352
1353 lockdep_assert_held(&priv->mutex);
1354
1355 if (priv->scan_vif == vif) {
1356 iwl_scan_cancel_timeout(priv, 200);
1357 iwl_force_scan_end(priv);
1358 }
1359
1360 if (!mode_change) {
1361 iwl_set_mode(priv, ctx);
1362 if (!ctx->always_active)
1363 ctx->is_active = false;
1364 }
1365
1366 /*
1367 * When removing the IBSS interface, overwrite the
1368 * BT traffic load with the stored one from the last
1369 * notification, if any. If this is a device that
1370 * doesn't implement this, this has no effect since
1371 * both values are the same and zero.
1372 */
1373 if (vif->type == NL80211_IFTYPE_ADHOC)
1374 priv->bt_traffic_load = priv->last_bt_traffic_load;
1375 }
1376
iwlagn_mac_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1377 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1378 struct ieee80211_vif *vif)
1379 {
1380 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1381 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1382
1383 IWL_DEBUG_MAC80211(priv, "enter\n");
1384
1385 mutex_lock(&priv->mutex);
1386
1387 WARN_ON(ctx->vif != vif);
1388 ctx->vif = NULL;
1389
1390 iwl_teardown_interface(priv, vif, false);
1391
1392 mutex_unlock(&priv->mutex);
1393
1394 IWL_DEBUG_MAC80211(priv, "leave\n");
1395
1396 }
1397
iwlagn_mac_change_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_iftype newtype,bool newp2p)1398 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1399 struct ieee80211_vif *vif,
1400 enum nl80211_iftype newtype, bool newp2p)
1401 {
1402 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1403 struct iwl_rxon_context *ctx, *tmp;
1404 enum nl80211_iftype newviftype = newtype;
1405 u32 interface_modes;
1406 int err;
1407
1408 IWL_DEBUG_MAC80211(priv, "enter\n");
1409
1410 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1411
1412 mutex_lock(&priv->mutex);
1413
1414 ctx = iwl_rxon_ctx_from_vif(vif);
1415
1416 /*
1417 * To simplify this code, only support changes on the
1418 * BSS context. The PAN context is usually reassigned
1419 * by creating/removing P2P interfaces anyway.
1420 */
1421 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1422 err = -EBUSY;
1423 goto out;
1424 }
1425
1426 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1427 /*
1428 * Huh? But wait ... this can maybe happen when
1429 * we're in the middle of a firmware restart!
1430 */
1431 err = -EBUSY;
1432 goto out;
1433 }
1434
1435 /* Check if the switch is supported in the same context */
1436 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1437 if (!(interface_modes & BIT(newtype))) {
1438 err = -EBUSY;
1439 goto out;
1440 }
1441
1442 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1443 for_each_context(priv, tmp) {
1444 if (ctx == tmp)
1445 continue;
1446
1447 if (!tmp->is_active)
1448 continue;
1449
1450 /*
1451 * The current mode switch would be exclusive, but
1452 * another context is active ... refuse the switch.
1453 */
1454 err = -EBUSY;
1455 goto out;
1456 }
1457 }
1458
1459 /* success */
1460 iwl_teardown_interface(priv, vif, true);
1461 vif->type = newviftype;
1462 vif->p2p = newp2p;
1463 err = iwl_setup_interface(priv, ctx);
1464 WARN_ON(err);
1465 /*
1466 * We've switched internally, but submitting to the
1467 * device may have failed for some reason. Mask this
1468 * error, because otherwise mac80211 will not switch
1469 * (and set the interface type back) and we'll be
1470 * out of sync with it.
1471 */
1472 err = 0;
1473
1474 out:
1475 mutex_unlock(&priv->mutex);
1476 IWL_DEBUG_MAC80211(priv, "leave\n");
1477
1478 return err;
1479 }
1480
iwlagn_mac_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_scan_request * hw_req)1481 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1482 struct ieee80211_vif *vif,
1483 struct ieee80211_scan_request *hw_req)
1484 {
1485 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1486 struct cfg80211_scan_request *req = &hw_req->req;
1487 int ret;
1488
1489 IWL_DEBUG_MAC80211(priv, "enter\n");
1490
1491 if (req->n_channels == 0)
1492 return -EINVAL;
1493
1494 mutex_lock(&priv->mutex);
1495
1496 /*
1497 * If an internal scan is in progress, just set
1498 * up the scan_request as per above.
1499 */
1500 if (priv->scan_type != IWL_SCAN_NORMAL) {
1501 IWL_DEBUG_SCAN(priv,
1502 "SCAN request during internal scan - defer\n");
1503 priv->scan_request = req;
1504 priv->scan_vif = vif;
1505 ret = 0;
1506 } else {
1507 priv->scan_request = req;
1508 priv->scan_vif = vif;
1509 /*
1510 * mac80211 will only ask for one band at a time
1511 * so using channels[0] here is ok
1512 */
1513 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1514 req->channels[0]->band);
1515 if (ret) {
1516 priv->scan_request = NULL;
1517 priv->scan_vif = NULL;
1518 }
1519 }
1520
1521 IWL_DEBUG_MAC80211(priv, "leave\n");
1522
1523 mutex_unlock(&priv->mutex);
1524
1525 return ret;
1526 }
1527
iwl_sta_modify_ps_wake(struct iwl_priv * priv,int sta_id)1528 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1529 {
1530 struct iwl_addsta_cmd cmd = {
1531 .mode = STA_CONTROL_MODIFY_MSK,
1532 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1533 .sta.sta_id = sta_id,
1534 };
1535
1536 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1537 }
1538
iwlagn_mac_sta_notify(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum sta_notify_cmd cmd,struct ieee80211_sta * sta)1539 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1540 struct ieee80211_vif *vif,
1541 enum sta_notify_cmd cmd,
1542 struct ieee80211_sta *sta)
1543 {
1544 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1545 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1546 int sta_id;
1547
1548 IWL_DEBUG_MAC80211(priv, "enter\n");
1549
1550 switch (cmd) {
1551 case STA_NOTIFY_SLEEP:
1552 WARN_ON(!sta_priv->client);
1553 sta_priv->asleep = true;
1554 if (atomic_read(&sta_priv->pending_frames) > 0)
1555 ieee80211_sta_block_awake(hw, sta, true);
1556 break;
1557 case STA_NOTIFY_AWAKE:
1558 WARN_ON(!sta_priv->client);
1559 if (!sta_priv->asleep)
1560 break;
1561 sta_priv->asleep = false;
1562 sta_id = iwl_sta_id(sta);
1563 if (sta_id != IWL_INVALID_STATION)
1564 iwl_sta_modify_ps_wake(priv, sta_id);
1565 break;
1566 default:
1567 break;
1568 }
1569 IWL_DEBUG_MAC80211(priv, "leave\n");
1570 }
1571
1572 const struct ieee80211_ops iwlagn_hw_ops = {
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. */
iwl_alloc_all(void)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 }
1624