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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlwifi / dvm / mac80211.c
blob6512d25e35630387aa8c2f536c6afe4c39ecf244
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 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 * Contact Information:
11 * Intel Linux Wireless <linuxwifi@intel.com>
12 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
13 *
14 *****************************************************************************/
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/delay.h>
20 #include <linux/sched.h>
21 #include <linux/skbuff.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/if_arp.h>
25
26 #include <net/ieee80211_radiotap.h>
27 #include <net/mac80211.h>
28
29 #include <asm/div64.h>
30
31 #include "iwl-io.h"
32 #include "iwl-trans.h"
33 #include "iwl-op-mode.h"
34 #include "iwl-modparams.h"
35
36 #include "dev.h"
37 #include "calib.h"
38 #include "agn.h"
39
40 /*****************************************************************************
41 *
42 * mac80211 entry point functions
43 *
44 *****************************************************************************/
45
46 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
47 {
48 .max = 1,
49 .types = BIT(NL80211_IFTYPE_STATION),
50 },
51 {
52 .max = 1,
53 .types = BIT(NL80211_IFTYPE_AP),
54 },
55 };
56
57 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
58 {
59 .max = 2,
60 .types = BIT(NL80211_IFTYPE_STATION),
61 },
62 };
63
64 static const struct ieee80211_iface_combination
65 iwlagn_iface_combinations_dualmode[] = {
66 { .num_different_channels = 1,
67 .max_interfaces = 2,
68 .beacon_int_infra_match = true,
69 .limits = iwlagn_sta_ap_limits,
70 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
71 },
72 { .num_different_channels = 1,
73 .max_interfaces = 2,
74 .limits = iwlagn_2sta_limits,
75 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
76 },
77 };
78
79 /*
80 * Not a mac80211 entry point function, but it fits in with all the
81 * other mac80211 functions grouped here.
82 */
83 int iwlagn_mac_setup_register(struct iwl_priv *priv,
84 const struct iwl_ucode_capabilities *capa)
85 {
86 int ret;
87 struct ieee80211_hw *hw = priv->hw;
88 struct iwl_rxon_context *ctx;
89
90 hw->rate_control_algorithm = "iwl-agn-rs";
91
92 /* Tell mac80211 our characteristics */
93 ieee80211_hw_set(hw, SIGNAL_DBM);
94 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
95 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
96 ieee80211_hw_set(hw, SPECTRUM_MGMT);
97 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
98 ieee80211_hw_set(hw, QUEUE_CONTROL);
99 ieee80211_hw_set(hw, SUPPORTS_PS);
100 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
101 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
102 ieee80211_hw_set(hw, WANT_MONITOR_VIF);
103
104 if (priv->trans->max_skb_frags)
105 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
106
107 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
108 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
109
110 /*
111 * Including the following line will crash some AP's. This
112 * workaround removes the stimulus which causes the crash until
113 * the AP software can be fixed.
114 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
115 */
116
117 if (priv->nvm_data->sku_cap_11n_enable)
118 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
119 NL80211_FEATURE_STATIC_SMPS;
120
121 /*
122 * Enable 11w if advertised by firmware and software crypto
123 * is not enabled (as the firmware will interpret some mgmt
124 * packets, so enabling it with software crypto isn't safe)
125 */
126 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
127 !iwlwifi_mod_params.swcrypto)
128 ieee80211_hw_set(hw, MFP_CAPABLE);
129
130 hw->sta_data_size = sizeof(struct iwl_station_priv);
131 hw->vif_data_size = sizeof(struct iwl_vif_priv);
132
133 for_each_context(priv, ctx) {
134 hw->wiphy->interface_modes |= ctx->interface_modes;
135 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
136 }
137
138 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
139
140 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
141 hw->wiphy->iface_combinations =
142 iwlagn_iface_combinations_dualmode;
143 hw->wiphy->n_iface_combinations =
144 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
145 }
146
147 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
148 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
149 REGULATORY_DISABLE_BEACON_HINTS;
150
151 #ifdef CONFIG_PM_SLEEP
152 if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec &&
153 priv->trans->ops->d3_suspend &&
154 priv->trans->ops->d3_resume &&
155 device_can_wakeup(priv->trans->dev)) {
156 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
157 WIPHY_WOWLAN_DISCONNECT |
158 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
159 WIPHY_WOWLAN_RFKILL_RELEASE;
160 if (!iwlwifi_mod_params.swcrypto)
161 priv->wowlan_support.flags |=
162 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
163 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
164
165 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
166 priv->wowlan_support.pattern_min_len =
167 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
168 priv->wowlan_support.pattern_max_len =
169 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
170 hw->wiphy->wowlan = &priv->wowlan_support;
171 }
172 #endif
173
174 if (iwlwifi_mod_params.power_save)
175 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
176 else
177 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
178
179 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
180 /* we create the 802.11 header and a max-length SSID element */
181 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
182
183 /*
184 * We don't use all queues: 4 and 9 are unused and any
185 * aggregation queue gets mapped down to the AC queue.
186 */
187 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
188
189 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
190
191 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
192 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
193 &priv->nvm_data->bands[NL80211_BAND_2GHZ];
194 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
195 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
196 &priv->nvm_data->bands[NL80211_BAND_5GHZ];
197
198 hw->wiphy->hw_version = priv->trans->hw_id;
199
200 iwl_leds_init(priv);
201
202 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
203
204 ret = ieee80211_register_hw(priv->hw);
205 if (ret) {
206 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
207 iwl_leds_exit(priv);
208 return ret;
209 }
210 priv->mac80211_registered = 1;
211
212 return 0;
213 }
214
215 void iwlagn_mac_unregister(struct iwl_priv *priv)
216 {
217 if (!priv->mac80211_registered)
218 return;
219 iwl_leds_exit(priv);
220 ieee80211_unregister_hw(priv->hw);
221 priv->mac80211_registered = 0;
222 }
223
224 static int __iwl_up(struct iwl_priv *priv)
225 {
226 struct iwl_rxon_context *ctx;
227 int ret;
228
229 lockdep_assert_held(&priv->mutex);
230
231 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
232 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
233 return -EIO;
234 }
235
236 for_each_context(priv, ctx) {
237 ret = iwlagn_alloc_bcast_station(priv, ctx);
238 if (ret) {
239 iwl_dealloc_bcast_stations(priv);
240 return ret;
241 }
242 }
243
244 ret = iwl_trans_start_hw(priv->trans);
245 if (ret) {
246 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
247 goto error;
248 }
249
250 ret = iwl_run_init_ucode(priv);
251 if (ret) {
252 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
253 goto error;
254 }
255
256 ret = iwl_trans_start_hw(priv->trans);
257 if (ret) {
258 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
259 goto error;
260 }
261
262 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
263 if (ret) {
264 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
265 goto error;
266 }
267
268 ret = iwl_alive_start(priv);
269 if (ret)
270 goto error;
271 return 0;
272
273 error:
274 set_bit(STATUS_EXIT_PENDING, &priv->status);
275 iwl_down(priv);
276 clear_bit(STATUS_EXIT_PENDING, &priv->status);
277
278 IWL_ERR(priv, "Unable to initialize device.\n");
279 return ret;
280 }
281
282 static int iwlagn_mac_start(struct ieee80211_hw *hw)
283 {
284 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
285 int ret;
286
287 IWL_DEBUG_MAC80211(priv, "enter\n");
288
289 /* we should be verifying the device is ready to be opened */
290 mutex_lock(&priv->mutex);
291 ret = __iwl_up(priv);
292 mutex_unlock(&priv->mutex);
293 if (ret)
294 return ret;
295
296 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
297
298 /* Now we should be done, and the READY bit should be set. */
299 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
300 ret = -EIO;
301
302 iwlagn_led_enable(priv);
303
304 priv->is_open = 1;
305 IWL_DEBUG_MAC80211(priv, "leave\n");
306 return 0;
307 }
308
309 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
310 {
311 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
312
313 IWL_DEBUG_MAC80211(priv, "enter\n");
314
315 if (!priv->is_open)
316 return;
317
318 priv->is_open = 0;
319
320 mutex_lock(&priv->mutex);
321 iwl_down(priv);
322 mutex_unlock(&priv->mutex);
323
324 iwl_cancel_deferred_work(priv);
325
326 flush_workqueue(priv->workqueue);
327
328 IWL_DEBUG_MAC80211(priv, "leave\n");
329 }
330
331 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
332 struct ieee80211_vif *vif,
333 struct cfg80211_gtk_rekey_data *data)
334 {
335 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
336
337 if (iwlwifi_mod_params.swcrypto)
338 return;
339
340 IWL_DEBUG_MAC80211(priv, "enter\n");
341 mutex_lock(&priv->mutex);
342
343 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
344 goto out;
345
346 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
347 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
348 priv->replay_ctr =
349 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
350 priv->have_rekey_data = true;
351
352 out:
353 mutex_unlock(&priv->mutex);
354 IWL_DEBUG_MAC80211(priv, "leave\n");
355 }
356
357 #ifdef CONFIG_PM_SLEEP
358
359 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
360 struct cfg80211_wowlan *wowlan)
361 {
362 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
363 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
364 int ret;
365
366 if (WARN_ON(!wowlan))
367 return -EINVAL;
368
369 IWL_DEBUG_MAC80211(priv, "enter\n");
370 mutex_lock(&priv->mutex);
371
372 /* Don't attempt WoWLAN when not associated, tear down instead. */
373 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
374 !iwl_is_associated_ctx(ctx)) {
375 ret = 1;
376 goto out;
377 }
378
379 ret = iwlagn_suspend(priv, wowlan);
380 if (ret)
381 goto error;
382
383 /* let the ucode operate on its own */
384 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
385 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
386
387 iwl_trans_d3_suspend(priv->trans, false, true);
388
389 goto out;
390
391 error:
392 priv->wowlan = false;
393 iwlagn_prepare_restart(priv);
394 ieee80211_restart_hw(priv->hw);
395 out:
396 mutex_unlock(&priv->mutex);
397 IWL_DEBUG_MAC80211(priv, "leave\n");
398
399 return ret;
400 }
401
402 struct iwl_resume_data {
403 struct iwl_priv *priv;
404 struct iwlagn_wowlan_status *cmd;
405 bool valid;
406 };
407
408 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
409 struct iwl_rx_packet *pkt, void *data)
410 {
411 struct iwl_resume_data *resume_data = data;
412 struct iwl_priv *priv = resume_data->priv;
413
414 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
415 IWL_ERR(priv, "rx wrong size data\n");
416 return true;
417 }
418 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
419 resume_data->valid = true;
420
421 return true;
422 }
423
424 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
425 {
426 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
427 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
428 struct ieee80211_vif *vif;
429 u32 base;
430 int ret;
431 enum iwl_d3_status d3_status;
432 struct error_table_start {
433 /* cf. struct iwl_error_event_table */
434 u32 valid;
435 u32 error_id;
436 } err_info;
437 struct iwl_notification_wait status_wait;
438 static const u16 status_cmd[] = {
439 REPLY_WOWLAN_GET_STATUS,
440 };
441 struct iwlagn_wowlan_status status_data = {};
442 struct iwl_resume_data resume_data = {
443 .priv = priv,
444 .cmd = &status_data,
445 .valid = false,
446 };
447 struct cfg80211_wowlan_wakeup wakeup = {
448 .pattern_idx = -1,
449 };
450 #ifdef CONFIG_IWLWIFI_DEBUGFS
451 const struct fw_img *img;
452 #endif
453
454 IWL_DEBUG_MAC80211(priv, "enter\n");
455 mutex_lock(&priv->mutex);
456
457 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
458 vif = ctx->vif;
459
460 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
461 if (ret)
462 goto out_unlock;
463
464 if (d3_status != IWL_D3_STATUS_ALIVE) {
465 IWL_INFO(priv, "Device was reset during suspend\n");
466 goto out_unlock;
467 }
468
469 /* uCode is no longer operating by itself */
470 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
471 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
472
473 base = priv->device_pointers.error_event_table;
474 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
475 IWL_WARN(priv, "Invalid error table during resume!\n");
476 goto out_unlock;
477 }
478
479 iwl_trans_read_mem_bytes(priv->trans, base,
480 &err_info, sizeof(err_info));
481
482 if (err_info.valid) {
483 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
484 err_info.valid, err_info.error_id);
485 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
486 wakeup.rfkill_release = true;
487 ieee80211_report_wowlan_wakeup(vif, &wakeup,
488 GFP_KERNEL);
489 }
490 goto out_unlock;
491 }
492
493 #ifdef CONFIG_IWLWIFI_DEBUGFS
494 img = &priv->fw->img[IWL_UCODE_WOWLAN];
495 if (!priv->wowlan_sram)
496 priv->wowlan_sram =
497 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
498 GFP_KERNEL);
499
500 if (priv->wowlan_sram)
501 iwl_trans_read_mem(priv->trans, 0x800000,
502 priv->wowlan_sram,
503 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
504 #endif
505
506 /*
507 * This is very strange. The GET_STATUS command is sent but the device
508 * doesn't reply properly, it seems it doesn't close the RBD so one is
509 * always left open ... As a result, we need to send another command
510 * and have to reset the driver afterwards. As we need to switch to
511 * runtime firmware again that'll happen.
512 */
513
514 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
515 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
516 &resume_data);
517
518 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
519 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
520 /* an RBD is left open in the firmware now! */
521
522 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
523 if (ret)
524 goto out_unlock;
525
526 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
527 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
528 struct cfg80211_wowlan_wakeup *wakeup_report;
529
530 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
531
532 if (reasons) {
533 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
534 wakeup.magic_pkt = true;
535 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
536 wakeup.pattern_idx = status_data.pattern_number;
537 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
538 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
539 wakeup.disconnect = true;
540 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
541 wakeup.gtk_rekey_failure = true;
542 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
543 wakeup.eap_identity_req = true;
544 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
545 wakeup.four_way_handshake = true;
546 wakeup_report = &wakeup;
547 } else {
548 wakeup_report = NULL;
549 }
550
551 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
552 }
553
554 priv->wowlan = false;
555
556 iwlagn_prepare_restart(priv);
557
558 memset((void *)&ctx->active, 0, sizeof(ctx->active));
559 iwl_connection_init_rx_config(priv, ctx);
560 iwlagn_set_rxon_chain(priv, ctx);
561
562 out_unlock:
563 mutex_unlock(&priv->mutex);
564 IWL_DEBUG_MAC80211(priv, "leave\n");
565
566 ieee80211_resume_disconnect(vif);
567
568 return 1;
569 }
570
571 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
572 {
573 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
574
575 device_set_wakeup_enable(priv->trans->dev, enabled);
576 }
577 #endif
578
579 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
580 struct ieee80211_tx_control *control,
581 struct sk_buff *skb)
582 {
583 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
584
585 if (iwlagn_tx_skb(priv, control->sta, skb))
586 ieee80211_free_txskb(hw, skb);
587 }
588
589 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
590 struct ieee80211_vif *vif,
591 struct ieee80211_key_conf *keyconf,
592 struct ieee80211_sta *sta,
593 u32 iv32, u16 *phase1key)
594 {
595 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
596
597 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
598 }
599
600 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
601 struct ieee80211_vif *vif,
602 struct ieee80211_sta *sta,
603 struct ieee80211_key_conf *key)
604 {
605 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
606 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
607 struct iwl_rxon_context *ctx = vif_priv->ctx;
608 int ret;
609 bool is_default_wep_key = false;
610
611 IWL_DEBUG_MAC80211(priv, "enter\n");
612
613 if (iwlwifi_mod_params.swcrypto) {
614 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
615 return -EOPNOTSUPP;
616 }
617
618 switch (key->cipher) {
619 case WLAN_CIPHER_SUITE_TKIP:
620 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
621 /* fall through */
622 case WLAN_CIPHER_SUITE_CCMP:
623 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
624 break;
625 default:
626 break;
627 }
628
629 /*
630 * We could program these keys into the hardware as well, but we
631 * don't expect much multicast traffic in IBSS and having keys
632 * for more stations is probably more useful.
633 *
634 * Mark key TX-only and return 0.
635 */
636 if (vif->type == NL80211_IFTYPE_ADHOC &&
637 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
638 key->hw_key_idx = WEP_INVALID_OFFSET;
639 return 0;
640 }
641
642 /* If they key was TX-only, accept deletion */
643 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
644 return 0;
645
646 mutex_lock(&priv->mutex);
647 iwl_scan_cancel_timeout(priv, 100);
648
649 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
650
651 /*
652 * If we are getting WEP group key and we didn't receive any key mapping
653 * so far, we are in legacy wep mode (group key only), otherwise we are
654 * in 1X mode.
655 * In legacy wep mode, we use another host command to the uCode.
656 */
657 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
658 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
659 if (cmd == SET_KEY)
660 is_default_wep_key = !ctx->key_mapping_keys;
661 else
662 is_default_wep_key =
663 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
664 }
665
666
667 switch (cmd) {
668 case SET_KEY:
669 if (is_default_wep_key) {
670 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
671 break;
672 }
673 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
674 if (ret) {
675 /*
676 * can't add key for RX, but we don't need it
677 * in the device for TX so still return 0
678 */
679 ret = 0;
680 key->hw_key_idx = WEP_INVALID_OFFSET;
681 }
682
683 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
684 break;
685 case DISABLE_KEY:
686 if (is_default_wep_key)
687 ret = iwl_remove_default_wep_key(priv, ctx, key);
688 else
689 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
690
691 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
692 break;
693 default:
694 ret = -EINVAL;
695 }
696
697 mutex_unlock(&priv->mutex);
698 IWL_DEBUG_MAC80211(priv, "leave\n");
699
700 return ret;
701 }
702
703 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
704 struct ieee80211_vif *vif,
705 struct ieee80211_ampdu_params *params)
706 {
707 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
708 int ret = -EINVAL;
709 struct ieee80211_sta *sta = params->sta;
710 enum ieee80211_ampdu_mlme_action action = params->action;
711 u16 tid = params->tid;
712 u16 *ssn = &params->ssn;
713 u8 buf_size = params->buf_size;
714 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
715
716 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
717 sta->addr, tid);
718
719 if (!(priv->nvm_data->sku_cap_11n_enable))
720 return -EACCES;
721
722 IWL_DEBUG_MAC80211(priv, "enter\n");
723 mutex_lock(&priv->mutex);
724
725 switch (action) {
726 case IEEE80211_AMPDU_RX_START:
727 if (!iwl_enable_rx_ampdu())
728 break;
729 IWL_DEBUG_HT(priv, "start Rx\n");
730 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
731 break;
732 case IEEE80211_AMPDU_RX_STOP:
733 IWL_DEBUG_HT(priv, "stop Rx\n");
734 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
735 break;
736 case IEEE80211_AMPDU_TX_START:
737 if (!priv->trans->ops->txq_enable)
738 break;
739 if (!iwl_enable_tx_ampdu())
740 break;
741 IWL_DEBUG_HT(priv, "start Tx\n");
742 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
743 break;
744 case IEEE80211_AMPDU_TX_STOP_FLUSH:
745 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
746 IWL_DEBUG_HT(priv, "Flush Tx\n");
747 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
748 break;
749 case IEEE80211_AMPDU_TX_STOP_CONT:
750 IWL_DEBUG_HT(priv, "stop Tx\n");
751 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
752 if ((ret == 0) && (priv->agg_tids_count > 0)) {
753 priv->agg_tids_count--;
754 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
755 priv->agg_tids_count);
756 }
757 if (!priv->agg_tids_count &&
758 priv->hw_params.use_rts_for_aggregation) {
759 /*
760 * switch off RTS/CTS if it was previously enabled
761 */
762 sta_priv->lq_sta.lq.general_params.flags &=
763 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
764 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
765 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
766 }
767 break;
768 case IEEE80211_AMPDU_TX_OPERATIONAL:
769 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
770 break;
771 }
772 mutex_unlock(&priv->mutex);
773 IWL_DEBUG_MAC80211(priv, "leave\n");
774 return ret;
775 }
776
777 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
778 struct ieee80211_vif *vif,
779 struct ieee80211_sta *sta)
780 {
781 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
782 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
783 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
784 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
785 int ret;
786 u8 sta_id;
787
788 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
789 sta->addr);
790 sta_priv->sta_id = IWL_INVALID_STATION;
791
792 atomic_set(&sta_priv->pending_frames, 0);
793 if (vif->type == NL80211_IFTYPE_AP)
794 sta_priv->client = true;
795
796 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
797 is_ap, sta, &sta_id);
798 if (ret) {
799 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
800 sta->addr, ret);
801 /* Should we return success if return code is EEXIST ? */
802 return ret;
803 }
804
805 sta_priv->sta_id = sta_id;
806
807 return 0;
808 }
809
810 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
811 struct ieee80211_vif *vif,
812 struct ieee80211_sta *sta)
813 {
814 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
815 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
816 int ret;
817
818 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
819
820 if (vif->type == NL80211_IFTYPE_STATION) {
821 /*
822 * Station will be removed from device when the RXON
823 * is set to unassociated -- just deactivate it here
824 * to avoid re-programming it.
825 */
826 ret = 0;
827 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
828 } else {
829 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
830 if (ret)
831 IWL_DEBUG_QUIET_RFKILL(priv,
832 "Error removing station %pM\n", sta->addr);
833 }
834 return ret;
835 }
836
837 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
838 struct ieee80211_vif *vif,
839 struct ieee80211_sta *sta,
840 enum ieee80211_sta_state old_state,
841 enum ieee80211_sta_state new_state)
842 {
843 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
844 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
845 enum {
846 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
847 } op = NONE;
848 int ret;
849
850 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
851 sta->addr, old_state, new_state);
852
853 mutex_lock(&priv->mutex);
854 if (vif->type == NL80211_IFTYPE_STATION) {
855 if (old_state == IEEE80211_STA_NOTEXIST &&
856 new_state == IEEE80211_STA_NONE)
857 op = ADD;
858 else if (old_state == IEEE80211_STA_NONE &&
859 new_state == IEEE80211_STA_NOTEXIST)
860 op = REMOVE;
861 else if (old_state == IEEE80211_STA_AUTH &&
862 new_state == IEEE80211_STA_ASSOC)
863 op = HT_RATE_INIT;
864 } else {
865 if (old_state == IEEE80211_STA_AUTH &&
866 new_state == IEEE80211_STA_ASSOC)
867 op = ADD_RATE_INIT;
868 else if (old_state == IEEE80211_STA_ASSOC &&
869 new_state == IEEE80211_STA_AUTH)
870 op = REMOVE;
871 }
872
873 switch (op) {
874 case ADD:
875 ret = iwlagn_mac_sta_add(hw, vif, sta);
876 if (ret)
877 break;
878 /*
879 * Clear the in-progress flag, the AP station entry was added
880 * but we'll initialize LQ only when we've associated (which
881 * would also clear the in-progress flag). This is necessary
882 * in case we never initialize LQ because association fails.
883 */
884 spin_lock_bh(&priv->sta_lock);
885 priv->stations[iwl_sta_id(sta)].used &=
886 ~IWL_STA_UCODE_INPROGRESS;
887 spin_unlock_bh(&priv->sta_lock);
888 break;
889 case REMOVE:
890 ret = iwlagn_mac_sta_remove(hw, vif, sta);
891 break;
892 case ADD_RATE_INIT:
893 ret = iwlagn_mac_sta_add(hw, vif, sta);
894 if (ret)
895 break;
896 /* Initialize rate scaling */
897 IWL_DEBUG_INFO(priv,
898 "Initializing rate scaling for station %pM\n",
899 sta->addr);
900 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
901 ret = 0;
902 break;
903 case HT_RATE_INIT:
904 /* Initialize rate scaling */
905 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
906 if (ret)
907 break;
908 IWL_DEBUG_INFO(priv,
909 "Initializing rate scaling for station %pM\n",
910 sta->addr);
911 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
912 ret = 0;
913 break;
914 default:
915 ret = 0;
916 break;
917 }
918
919 /*
920 * mac80211 might WARN if we fail, but due the way we
921 * (badly) handle hard rfkill, we might fail here
922 */
923 if (iwl_is_rfkill(priv))
924 ret = 0;
925
926 mutex_unlock(&priv->mutex);
927 IWL_DEBUG_MAC80211(priv, "leave\n");
928
929 return ret;
930 }
931
932 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
933 struct ieee80211_vif *vif,
934 struct ieee80211_channel_switch *ch_switch)
935 {
936 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
937 struct ieee80211_conf *conf = &hw->conf;
938 struct ieee80211_channel *channel = ch_switch->chandef.chan;
939 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
940 /*
941 * MULTI-FIXME
942 * When we add support for multiple interfaces, we need to
943 * revisit this. The channel switch command in the device
944 * only affects the BSS context, but what does that really
945 * mean? And what if we get a CSA on the second interface?
946 * This needs a lot of work.
947 */
948 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
949 u16 ch;
950
951 IWL_DEBUG_MAC80211(priv, "enter\n");
952
953 mutex_lock(&priv->mutex);
954
955 if (iwl_is_rfkill(priv))
956 goto out;
957
958 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
959 test_bit(STATUS_SCANNING, &priv->status) ||
960 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
961 goto out;
962
963 if (!iwl_is_associated_ctx(ctx))
964 goto out;
965
966 if (!priv->lib->set_channel_switch)
967 goto out;
968
969 ch = channel->hw_value;
970 if (le16_to_cpu(ctx->active.channel) == ch)
971 goto out;
972
973 priv->current_ht_config.smps = conf->smps_mode;
974
975 /* Configure HT40 channels */
976 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
977 case NL80211_CHAN_NO_HT:
978 case NL80211_CHAN_HT20:
979 ctx->ht.is_40mhz = false;
980 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
981 break;
982 case NL80211_CHAN_HT40MINUS:
983 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
984 ctx->ht.is_40mhz = true;
985 break;
986 case NL80211_CHAN_HT40PLUS:
987 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
988 ctx->ht.is_40mhz = true;
989 break;
990 }
991
992 if ((le16_to_cpu(ctx->staging.channel) != ch))
993 ctx->staging.flags = 0;
994
995 iwl_set_rxon_channel(priv, channel, ctx);
996 iwl_set_rxon_ht(priv, ht_conf);
997 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
998
999 /*
1000 * at this point, staging_rxon has the
1001 * configuration for channel switch
1002 */
1003 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1004 priv->switch_channel = cpu_to_le16(ch);
1005 if (priv->lib->set_channel_switch(priv, ch_switch)) {
1006 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1007 priv->switch_channel = 0;
1008 ieee80211_chswitch_done(ctx->vif, false);
1009 }
1010
1011 out:
1012 mutex_unlock(&priv->mutex);
1013 IWL_DEBUG_MAC80211(priv, "leave\n");
1014 }
1015
1016 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1017 {
1018 /*
1019 * MULTI-FIXME
1020 * See iwlagn_mac_channel_switch.
1021 */
1022 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1023
1024 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1025 return;
1026
1027 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1028 return;
1029
1030 if (ctx->vif)
1031 ieee80211_chswitch_done(ctx->vif, is_success);
1032 }
1033
1034 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1035 unsigned int changed_flags,
1036 unsigned int *total_flags,
1037 u64 multicast)
1038 {
1039 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1040 __le32 filter_or = 0, filter_nand = 0;
1041 struct iwl_rxon_context *ctx;
1042
1043 #define CHK(test, flag) do { \
1044 if (*total_flags & (test)) \
1045 filter_or |= (flag); \
1046 else \
1047 filter_nand |= (flag); \
1048 } while (0)
1049
1050 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1051 changed_flags, *total_flags);
1052
1053 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1054 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1055 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1056 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1057
1058 #undef CHK
1059
1060 mutex_lock(&priv->mutex);
1061
1062 for_each_context(priv, ctx) {
1063 ctx->staging.filter_flags &= ~filter_nand;
1064 ctx->staging.filter_flags |= filter_or;
1065
1066 /*
1067 * Not committing directly because hardware can perform a scan,
1068 * but we'll eventually commit the filter flags change anyway.
1069 */
1070 }
1071
1072 mutex_unlock(&priv->mutex);
1073
1074 /*
1075 * Receiving all multicast frames is always enabled by the
1076 * default flags setup in iwl_connection_init_rx_config()
1077 * since we currently do not support programming multicast
1078 * filters into the device.
1079 */
1080 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1081 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1082 }
1083
1084 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1085 u32 queues, bool drop)
1086 {
1087 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1088 u32 scd_queues;
1089
1090 mutex_lock(&priv->mutex);
1091 IWL_DEBUG_MAC80211(priv, "enter\n");
1092
1093 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1094 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1095 goto done;
1096 }
1097 if (iwl_is_rfkill(priv)) {
1098 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1099 goto done;
1100 }
1101
1102 scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1;
1103 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1104 BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1105
1106 if (drop) {
1107 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1108 scd_queues);
1109 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1110 IWL_ERR(priv, "flush request fail\n");
1111 goto done;
1112 }
1113 }
1114
1115 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1116 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1117 done:
1118 mutex_unlock(&priv->mutex);
1119 IWL_DEBUG_MAC80211(priv, "leave\n");
1120 }
1121
1122 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1123 struct ieee80211_vif *vif,
1124 const struct ieee80211_event *event)
1125 {
1126 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1127
1128 if (event->type != RSSI_EVENT)
1129 return;
1130
1131 IWL_DEBUG_MAC80211(priv, "enter\n");
1132
1133 if (priv->lib->bt_params &&
1134 priv->lib->bt_params->advanced_bt_coexist) {
1135 if (event->u.rssi.data == RSSI_EVENT_LOW)
1136 priv->bt_enable_pspoll = true;
1137 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1138 priv->bt_enable_pspoll = false;
1139
1140 queue_work(priv->workqueue, &priv->bt_runtime_config);
1141 } else {
1142 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1143 "ignoring RSSI callback\n");
1144 }
1145
1146 IWL_DEBUG_MAC80211(priv, "leave\n");
1147 }
1148
1149 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1150 struct ieee80211_sta *sta, bool set)
1151 {
1152 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1153
1154 queue_work(priv->workqueue, &priv->beacon_update);
1155
1156 return 0;
1157 }
1158
1159 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1160 struct ieee80211_vif *vif, u16 queue,
1161 const struct ieee80211_tx_queue_params *params)
1162 {
1163 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1164 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1165 struct iwl_rxon_context *ctx = vif_priv->ctx;
1166 int q;
1167
1168 if (WARN_ON(!ctx))
1169 return -EINVAL;
1170
1171 IWL_DEBUG_MAC80211(priv, "enter\n");
1172
1173 if (!iwl_is_ready_rf(priv)) {
1174 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1175 return -EIO;
1176 }
1177
1178 if (queue >= AC_NUM) {
1179 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1180 return 0;
1181 }
1182
1183 q = AC_NUM - 1 - queue;
1184
1185 mutex_lock(&priv->mutex);
1186
1187 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1188 cpu_to_le16(params->cw_min);
1189 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1190 cpu_to_le16(params->cw_max);
1191 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1192 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1193 cpu_to_le16((params->txop * 32));
1194
1195 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1196
1197 mutex_unlock(&priv->mutex);
1198
1199 IWL_DEBUG_MAC80211(priv, "leave\n");
1200 return 0;
1201 }
1202
1203 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1204 {
1205 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1206
1207 return priv->ibss_manager == IWL_IBSS_MANAGER;
1208 }
1209
1210 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1211 {
1212 iwl_connection_init_rx_config(priv, ctx);
1213
1214 iwlagn_set_rxon_chain(priv, ctx);
1215
1216 return iwlagn_commit_rxon(priv, ctx);
1217 }
1218
1219 static int iwl_setup_interface(struct iwl_priv *priv,
1220 struct iwl_rxon_context *ctx)
1221 {
1222 struct ieee80211_vif *vif = ctx->vif;
1223 int err, ac;
1224
1225 lockdep_assert_held(&priv->mutex);
1226
1227 /*
1228 * This variable will be correct only when there's just
1229 * a single context, but all code using it is for hardware
1230 * that supports only one context.
1231 */
1232 priv->iw_mode = vif->type;
1233
1234 ctx->is_active = true;
1235
1236 err = iwl_set_mode(priv, ctx);
1237 if (err) {
1238 if (!ctx->always_active)
1239 ctx->is_active = false;
1240 return err;
1241 }
1242
1243 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1244 vif->type == NL80211_IFTYPE_ADHOC) {
1245 /*
1246 * pretend to have high BT traffic as long as we
1247 * are operating in IBSS mode, as this will cause
1248 * the rate scaling etc. to behave as intended.
1249 */
1250 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1251 }
1252
1253 /* set up queue mappings */
1254 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1255 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1256
1257 if (vif->type == NL80211_IFTYPE_AP)
1258 vif->cab_queue = ctx->mcast_queue;
1259 else
1260 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1261
1262 return 0;
1263 }
1264
1265 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1266 struct ieee80211_vif *vif)
1267 {
1268 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1269 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1270 struct iwl_rxon_context *tmp, *ctx = NULL;
1271 int err;
1272 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1273 bool reset = false;
1274
1275 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1276 viftype, vif->addr);
1277
1278 mutex_lock(&priv->mutex);
1279
1280 if (!iwl_is_ready_rf(priv)) {
1281 IWL_WARN(priv, "Try to add interface when device not ready\n");
1282 err = -EINVAL;
1283 goto out;
1284 }
1285
1286 for_each_context(priv, tmp) {
1287 u32 possible_modes =
1288 tmp->interface_modes | tmp->exclusive_interface_modes;
1289
1290 if (tmp->vif) {
1291 /* On reset we need to add the same interface again */
1292 if (tmp->vif == vif) {
1293 reset = true;
1294 ctx = tmp;
1295 break;
1296 }
1297
1298 /* check if this busy context is exclusive */
1299 if (tmp->exclusive_interface_modes &
1300 BIT(tmp->vif->type)) {
1301 err = -EINVAL;
1302 goto out;
1303 }
1304 continue;
1305 }
1306
1307 if (!(possible_modes & BIT(viftype)))
1308 continue;
1309
1310 /* have maybe usable context w/o interface */
1311 ctx = tmp;
1312 break;
1313 }
1314
1315 if (!ctx) {
1316 err = -EOPNOTSUPP;
1317 goto out;
1318 }
1319
1320 vif_priv->ctx = ctx;
1321 ctx->vif = vif;
1322
1323 /*
1324 * In SNIFFER device type, the firmware reports the FCS to
1325 * the host, rather than snipping it off. Unfortunately,
1326 * mac80211 doesn't (yet) provide a per-packet flag for
1327 * this, so that we have to set the hardware flag based
1328 * on the interfaces added. As the monitor interface can
1329 * only be present by itself, and will be removed before
1330 * other interfaces are added, this is safe.
1331 */
1332 if (vif->type == NL80211_IFTYPE_MONITOR)
1333 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1334 else
1335 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1336
1337 err = iwl_setup_interface(priv, ctx);
1338 if (!err || reset)
1339 goto out;
1340
1341 ctx->vif = NULL;
1342 priv->iw_mode = NL80211_IFTYPE_STATION;
1343 out:
1344 mutex_unlock(&priv->mutex);
1345
1346 IWL_DEBUG_MAC80211(priv, "leave\n");
1347 return err;
1348 }
1349
1350 static void iwl_teardown_interface(struct iwl_priv *priv,
1351 struct ieee80211_vif *vif,
1352 bool mode_change)
1353 {
1354 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1355
1356 lockdep_assert_held(&priv->mutex);
1357
1358 if (priv->scan_vif == vif) {
1359 iwl_scan_cancel_timeout(priv, 200);
1360 iwl_force_scan_end(priv);
1361 }
1362
1363 if (!mode_change) {
1364 iwl_set_mode(priv, ctx);
1365 if (!ctx->always_active)
1366 ctx->is_active = false;
1367 }
1368
1369 /*
1370 * When removing the IBSS interface, overwrite the
1371 * BT traffic load with the stored one from the last
1372 * notification, if any. If this is a device that
1373 * doesn't implement this, this has no effect since
1374 * both values are the same and zero.
1375 */
1376 if (vif->type == NL80211_IFTYPE_ADHOC)
1377 priv->bt_traffic_load = priv->last_bt_traffic_load;
1378 }
1379
1380 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1381 struct ieee80211_vif *vif)
1382 {
1383 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1384 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1385
1386 IWL_DEBUG_MAC80211(priv, "enter\n");
1387
1388 mutex_lock(&priv->mutex);
1389
1390 WARN_ON(ctx->vif != vif);
1391 ctx->vif = NULL;
1392
1393 iwl_teardown_interface(priv, vif, false);
1394
1395 mutex_unlock(&priv->mutex);
1396
1397 IWL_DEBUG_MAC80211(priv, "leave\n");
1398
1399 }
1400
1401 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1402 struct ieee80211_vif *vif,
1403 enum nl80211_iftype newtype, bool newp2p)
1404 {
1405 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1406 struct iwl_rxon_context *ctx, *tmp;
1407 enum nl80211_iftype newviftype = newtype;
1408 u32 interface_modes;
1409 int err;
1410
1411 IWL_DEBUG_MAC80211(priv, "enter\n");
1412
1413 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1414
1415 mutex_lock(&priv->mutex);
1416
1417 ctx = iwl_rxon_ctx_from_vif(vif);
1418
1419 /*
1420 * To simplify this code, only support changes on the
1421 * BSS context. The PAN context is usually reassigned
1422 * by creating/removing P2P interfaces anyway.
1423 */
1424 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1425 err = -EBUSY;
1426 goto out;
1427 }
1428
1429 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1430 /*
1431 * Huh? But wait ... this can maybe happen when
1432 * we're in the middle of a firmware restart!
1433 */
1434 err = -EBUSY;
1435 goto out;
1436 }
1437
1438 /* Check if the switch is supported in the same context */
1439 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1440 if (!(interface_modes & BIT(newtype))) {
1441 err = -EBUSY;
1442 goto out;
1443 }
1444
1445 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1446 for_each_context(priv, tmp) {
1447 if (ctx == tmp)
1448 continue;
1449
1450 if (!tmp->is_active)
1451 continue;
1452
1453 /*
1454 * The current mode switch would be exclusive, but
1455 * another context is active ... refuse the switch.
1456 */
1457 err = -EBUSY;
1458 goto out;
1459 }
1460 }
1461
1462 /* success */
1463 iwl_teardown_interface(priv, vif, true);
1464 vif->type = newviftype;
1465 vif->p2p = newp2p;
1466 err = iwl_setup_interface(priv, ctx);
1467 WARN_ON(err);
1468 /*
1469 * We've switched internally, but submitting to the
1470 * device may have failed for some reason. Mask this
1471 * error, because otherwise mac80211 will not switch
1472 * (and set the interface type back) and we'll be
1473 * out of sync with it.
1474 */
1475 err = 0;
1476
1477 out:
1478 mutex_unlock(&priv->mutex);
1479 IWL_DEBUG_MAC80211(priv, "leave\n");
1480
1481 return err;
1482 }
1483
1484 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1485 struct ieee80211_vif *vif,
1486 struct ieee80211_scan_request *hw_req)
1487 {
1488 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1489 struct cfg80211_scan_request *req = &hw_req->req;
1490 int ret;
1491
1492 IWL_DEBUG_MAC80211(priv, "enter\n");
1493
1494 if (req->n_channels == 0)
1495 return -EINVAL;
1496
1497 mutex_lock(&priv->mutex);
1498
1499 /*
1500 * If an internal scan is in progress, just set
1501 * up the scan_request as per above.
1502 */
1503 if (priv->scan_type != IWL_SCAN_NORMAL) {
1504 IWL_DEBUG_SCAN(priv,
1505 "SCAN request during internal scan - defer\n");
1506 priv->scan_request = req;
1507 priv->scan_vif = vif;
1508 ret = 0;
1509 } else {
1510 priv->scan_request = req;
1511 priv->scan_vif = vif;
1512 /*
1513 * mac80211 will only ask for one band at a time
1514 * so using channels[0] here is ok
1515 */
1516 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1517 req->channels[0]->band);
1518 if (ret) {
1519 priv->scan_request = NULL;
1520 priv->scan_vif = NULL;
1521 }
1522 }
1523
1524 IWL_DEBUG_MAC80211(priv, "leave\n");
1525
1526 mutex_unlock(&priv->mutex);
1527
1528 return ret;
1529 }
1530
1531 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1532 {
1533 struct iwl_addsta_cmd cmd = {
1534 .mode = STA_CONTROL_MODIFY_MSK,
1535 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1536 .sta.sta_id = sta_id,
1537 };
1538
1539 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1540 }
1541
1542 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1543 struct ieee80211_vif *vif,
1544 enum sta_notify_cmd cmd,
1545 struct ieee80211_sta *sta)
1546 {
1547 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1548 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1549 int sta_id;
1550
1551 IWL_DEBUG_MAC80211(priv, "enter\n");
1552
1553 switch (cmd) {
1554 case STA_NOTIFY_SLEEP:
1555 WARN_ON(!sta_priv->client);
1556 sta_priv->asleep = true;
1557 if (atomic_read(&sta_priv->pending_frames) > 0)
1558 ieee80211_sta_block_awake(hw, sta, true);
1559 break;
1560 case STA_NOTIFY_AWAKE:
1561 WARN_ON(!sta_priv->client);
1562 if (!sta_priv->asleep)
1563 break;
1564 sta_priv->asleep = false;
1565 sta_id = iwl_sta_id(sta);
1566 if (sta_id != IWL_INVALID_STATION)
1567 iwl_sta_modify_ps_wake(priv, sta_id);
1568 break;
1569 default:
1570 break;
1571 }
1572 IWL_DEBUG_MAC80211(priv, "leave\n");
1573 }
1574
1575 const struct ieee80211_ops iwlagn_hw_ops = {
1576 .tx = iwlagn_mac_tx,
1577 .start = iwlagn_mac_start,
1578 .stop = iwlagn_mac_stop,
1579 #ifdef CONFIG_PM_SLEEP
1580 .suspend = iwlagn_mac_suspend,
1581 .resume = iwlagn_mac_resume,
1582 .set_wakeup = iwlagn_mac_set_wakeup,
1583 #endif
1584 .add_interface = iwlagn_mac_add_interface,
1585 .remove_interface = iwlagn_mac_remove_interface,
1586 .change_interface = iwlagn_mac_change_interface,
1587 .config = iwlagn_mac_config,
1588 .configure_filter = iwlagn_configure_filter,
1589 .set_key = iwlagn_mac_set_key,
1590 .update_tkip_key = iwlagn_mac_update_tkip_key,
1591 .set_rekey_data = iwlagn_mac_set_rekey_data,
1592 .conf_tx = iwlagn_mac_conf_tx,
1593 .bss_info_changed = iwlagn_bss_info_changed,
1594 .ampdu_action = iwlagn_mac_ampdu_action,
1595 .hw_scan = iwlagn_mac_hw_scan,
1596 .sta_notify = iwlagn_mac_sta_notify,
1597 .sta_state = iwlagn_mac_sta_state,
1598 .channel_switch = iwlagn_mac_channel_switch,
1599 .flush = iwlagn_mac_flush,
1600 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1601 .event_callback = iwlagn_mac_event_callback,
1602 .set_tim = iwlagn_mac_set_tim,
1603 };
1604
1605 /* This function both allocates and initializes hw and priv. */
1606 struct ieee80211_hw *iwl_alloc_all(void)
1607 {
1608 struct iwl_priv *priv;
1609 struct iwl_op_mode *op_mode;
1610 /* mac80211 allocates memory for this device instance, including
1611 * space for this driver's private structure */
1612 struct ieee80211_hw *hw;
1613
1614 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1615 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1616 if (!hw)
1617 goto out;
1618
1619 op_mode = hw->priv;
1620 priv = IWL_OP_MODE_GET_DVM(op_mode);
1621 priv->hw = hw;
1622
1623 out:
1624 return hw;
1625 }
Linux with added FPC-III support