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mac80211: use put_unaligned_le16 for precedence value in mesh
[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / iwlwifi / dvm / mac80211.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2013 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/dma-mapping.h>
34 #include <linux/delay.h>
35 #include <linux/sched.h>
36 #include <linux/skbuff.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/if_arp.h>
40
41 #include <net/ieee80211_radiotap.h>
42 #include <net/mac80211.h>
43
44 #include <asm/div64.h>
45
46 #include "iwl-io.h"
47 #include "iwl-trans.h"
48 #include "iwl-op-mode.h"
49 #include "iwl-modparams.h"
50
51 #include "dev.h"
52 #include "calib.h"
53 #include "agn.h"
54
55 /*****************************************************************************
56 *
57 * mac80211 entry point functions
58 *
59 *****************************************************************************/
60
61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
62 {
63 .max = 1,
64 .types = BIT(NL80211_IFTYPE_STATION),
65 },
66 {
67 .max = 1,
68 .types = BIT(NL80211_IFTYPE_AP),
69 },
70 };
71
72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
73 {
74 .max = 2,
75 .types = BIT(NL80211_IFTYPE_STATION),
76 },
77 };
78
79 static const struct ieee80211_iface_combination
80 iwlagn_iface_combinations_dualmode[] = {
81 { .num_different_channels = 1,
82 .max_interfaces = 2,
83 .beacon_int_infra_match = true,
84 .limits = iwlagn_sta_ap_limits,
85 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
86 },
87 { .num_different_channels = 1,
88 .max_interfaces = 2,
89 .limits = iwlagn_2sta_limits,
90 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
91 },
92 };
93
94 /*
95 * Not a mac80211 entry point function, but it fits in with all the
96 * other mac80211 functions grouped here.
97 */
98 int iwlagn_mac_setup_register(struct iwl_priv *priv,
99 const struct iwl_ucode_capabilities *capa)
100 {
101 int ret;
102 struct ieee80211_hw *hw = priv->hw;
103 struct iwl_rxon_context *ctx;
104
105 hw->rate_control_algorithm = "iwl-agn-rs";
106
107 /* Tell mac80211 our characteristics */
108 hw->flags = IEEE80211_HW_SIGNAL_DBM |
109 IEEE80211_HW_AMPDU_AGGREGATION |
110 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
111 IEEE80211_HW_SPECTRUM_MGMT |
112 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
113 IEEE80211_HW_QUEUE_CONTROL |
114 IEEE80211_HW_SUPPORTS_PS |
115 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
116 IEEE80211_HW_WANT_MONITOR_VIF;
117
118 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
119 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
120
121 /*
122 * Including the following line will crash some AP's. This
123 * workaround removes the stimulus which causes the crash until
124 * the AP software can be fixed.
125 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
126 */
127
128 if (priv->nvm_data->sku_cap_11n_enable)
129 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
130 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
131
132 /*
133 * Enable 11w if advertised by firmware and software crypto
134 * is not enabled (as the firmware will interpret some mgmt
135 * packets, so enabling it with software crypto isn't safe)
136 */
137 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
138 !iwlwifi_mod_params.sw_crypto)
139 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
140
141 hw->sta_data_size = sizeof(struct iwl_station_priv);
142 hw->vif_data_size = sizeof(struct iwl_vif_priv);
143
144 for_each_context(priv, ctx) {
145 hw->wiphy->interface_modes |= ctx->interface_modes;
146 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
147 }
148
149 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
150
151 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
152 hw->wiphy->iface_combinations =
153 iwlagn_iface_combinations_dualmode;
154 hw->wiphy->n_iface_combinations =
155 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
156 }
157
158 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
159 WIPHY_FLAG_DISABLE_BEACON_HINTS |
160 WIPHY_FLAG_IBSS_RSN;
161
162 #ifdef CONFIG_PM_SLEEP
163 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
164 priv->trans->ops->d3_suspend &&
165 priv->trans->ops->d3_resume &&
166 device_can_wakeup(priv->trans->dev)) {
167 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
168 WIPHY_WOWLAN_DISCONNECT |
169 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
170 WIPHY_WOWLAN_RFKILL_RELEASE;
171 if (!iwlwifi_mod_params.sw_crypto)
172 priv->wowlan_support.flags |=
173 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
174 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
175
176 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
177 priv->wowlan_support.pattern_min_len =
178 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
179 priv->wowlan_support.pattern_max_len =
180 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
181 hw->wiphy->wowlan = &priv->wowlan_support;
182 }
183 #endif
184
185 if (iwlwifi_mod_params.power_save)
186 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
187 else
188 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
189
190 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
191 /* we create the 802.11 header and a max-length SSID element */
192 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
193
194 /*
195 * We don't use all queues: 4 and 9 are unused and any
196 * aggregation queue gets mapped down to the AC queue.
197 */
198 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
199
200 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
201
202 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
203 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
204 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
205 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
206 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
207 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
208
209 hw->wiphy->hw_version = priv->trans->hw_id;
210
211 iwl_leds_init(priv);
212
213 ret = ieee80211_register_hw(priv->hw);
214 if (ret) {
215 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
216 iwl_leds_exit(priv);
217 return ret;
218 }
219 priv->mac80211_registered = 1;
220
221 return 0;
222 }
223
224 void iwlagn_mac_unregister(struct iwl_priv *priv)
225 {
226 if (!priv->mac80211_registered)
227 return;
228 iwl_leds_exit(priv);
229 ieee80211_unregister_hw(priv->hw);
230 priv->mac80211_registered = 0;
231 }
232
233 static int __iwl_up(struct iwl_priv *priv)
234 {
235 struct iwl_rxon_context *ctx;
236 int ret;
237
238 lockdep_assert_held(&priv->mutex);
239
240 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
241 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
242 return -EIO;
243 }
244
245 for_each_context(priv, ctx) {
246 ret = iwlagn_alloc_bcast_station(priv, ctx);
247 if (ret) {
248 iwl_dealloc_bcast_stations(priv);
249 return ret;
250 }
251 }
252
253 ret = iwl_run_init_ucode(priv);
254 if (ret) {
255 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
256 goto error;
257 }
258
259 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
260 if (ret) {
261 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
262 goto error;
263 }
264
265 ret = iwl_alive_start(priv);
266 if (ret)
267 goto error;
268 return 0;
269
270 error:
271 set_bit(STATUS_EXIT_PENDING, &priv->status);
272 iwl_down(priv);
273 clear_bit(STATUS_EXIT_PENDING, &priv->status);
274
275 IWL_ERR(priv, "Unable to initialize device.\n");
276 return ret;
277 }
278
279 static int iwlagn_mac_start(struct ieee80211_hw *hw)
280 {
281 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
282 int ret;
283
284 IWL_DEBUG_MAC80211(priv, "enter\n");
285
286 /* we should be verifying the device is ready to be opened */
287 mutex_lock(&priv->mutex);
288 ret = __iwl_up(priv);
289 mutex_unlock(&priv->mutex);
290 if (ret)
291 return ret;
292
293 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
294
295 /* Now we should be done, and the READY bit should be set. */
296 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
297 ret = -EIO;
298
299 iwlagn_led_enable(priv);
300
301 priv->is_open = 1;
302 IWL_DEBUG_MAC80211(priv, "leave\n");
303 return 0;
304 }
305
306 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
307 {
308 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
309
310 IWL_DEBUG_MAC80211(priv, "enter\n");
311
312 if (!priv->is_open)
313 return;
314
315 priv->is_open = 0;
316
317 mutex_lock(&priv->mutex);
318 iwl_down(priv);
319 mutex_unlock(&priv->mutex);
320
321 iwl_cancel_deferred_work(priv);
322
323 flush_workqueue(priv->workqueue);
324
325 /* User space software may expect getting rfkill changes
326 * even if interface is down, trans->down will leave the RF
327 * kill interrupt enabled
328 */
329 iwl_trans_stop_hw(priv->trans, false);
330
331 IWL_DEBUG_MAC80211(priv, "leave\n");
332 }
333
334 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
335 struct ieee80211_vif *vif,
336 struct cfg80211_gtk_rekey_data *data)
337 {
338 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
339
340 if (iwlwifi_mod_params.sw_crypto)
341 return;
342
343 IWL_DEBUG_MAC80211(priv, "enter\n");
344 mutex_lock(&priv->mutex);
345
346 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
347 goto out;
348
349 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
350 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
351 priv->replay_ctr =
352 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
353 priv->have_rekey_data = true;
354
355 out:
356 mutex_unlock(&priv->mutex);
357 IWL_DEBUG_MAC80211(priv, "leave\n");
358 }
359
360 #ifdef CONFIG_PM_SLEEP
361
362 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
363 struct cfg80211_wowlan *wowlan)
364 {
365 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
366 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
367 int ret;
368
369 if (WARN_ON(!wowlan))
370 return -EINVAL;
371
372 IWL_DEBUG_MAC80211(priv, "enter\n");
373 mutex_lock(&priv->mutex);
374
375 /* Don't attempt WoWLAN when not associated, tear down instead. */
376 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
377 !iwl_is_associated_ctx(ctx)) {
378 ret = 1;
379 goto out;
380 }
381
382 ret = iwlagn_suspend(priv, wowlan);
383 if (ret)
384 goto error;
385
386 /* let the ucode operate on its own */
387 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
388 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
389
390 iwl_trans_d3_suspend(priv->trans, false);
391
392 goto out;
393
394 error:
395 priv->wowlan = false;
396 iwlagn_prepare_restart(priv);
397 ieee80211_restart_hw(priv->hw);
398 out:
399 mutex_unlock(&priv->mutex);
400 IWL_DEBUG_MAC80211(priv, "leave\n");
401
402 return ret;
403 }
404
405 struct iwl_resume_data {
406 struct iwl_priv *priv;
407 struct iwlagn_wowlan_status *cmd;
408 bool valid;
409 };
410
411 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
412 struct iwl_rx_packet *pkt, void *data)
413 {
414 struct iwl_resume_data *resume_data = data;
415 struct iwl_priv *priv = resume_data->priv;
416 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
417
418 if (len - 4 != sizeof(*resume_data->cmd)) {
419 IWL_ERR(priv, "rx wrong size data\n");
420 return true;
421 }
422 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
423 resume_data->valid = true;
424
425 return true;
426 }
427
428 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
429 {
430 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
431 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
432 struct ieee80211_vif *vif;
433 u32 base;
434 int ret;
435 enum iwl_d3_status d3_status;
436 struct error_table_start {
437 /* cf. struct iwl_error_event_table */
438 u32 valid;
439 u32 error_id;
440 } err_info;
441 struct iwl_notification_wait status_wait;
442 static const u8 status_cmd[] = {
443 REPLY_WOWLAN_GET_STATUS,
444 };
445 struct iwlagn_wowlan_status status_data = {};
446 struct iwl_resume_data resume_data = {
447 .priv = priv,
448 .cmd = &status_data,
449 .valid = false,
450 };
451 struct cfg80211_wowlan_wakeup wakeup = {
452 .pattern_idx = -1,
453 };
454 #ifdef CONFIG_IWLWIFI_DEBUGFS
455 const struct fw_img *img;
456 #endif
457
458 IWL_DEBUG_MAC80211(priv, "enter\n");
459 mutex_lock(&priv->mutex);
460
461 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
462 vif = ctx->vif;
463
464 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false);
465 if (ret)
466 goto out_unlock;
467
468 if (d3_status != IWL_D3_STATUS_ALIVE) {
469 IWL_INFO(priv, "Device was reset during suspend\n");
470 goto out_unlock;
471 }
472
473 /* uCode is no longer operating by itself */
474 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
475 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
476
477 base = priv->device_pointers.error_event_table;
478 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
479 IWL_WARN(priv, "Invalid error table during resume!\n");
480 goto out_unlock;
481 }
482
483 iwl_trans_read_mem_bytes(priv->trans, base,
484 &err_info, sizeof(err_info));
485
486 if (err_info.valid) {
487 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
488 err_info.valid, err_info.error_id);
489 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
490 wakeup.rfkill_release = true;
491 ieee80211_report_wowlan_wakeup(vif, &wakeup,
492 GFP_KERNEL);
493 }
494 goto out_unlock;
495 }
496
497 #ifdef CONFIG_IWLWIFI_DEBUGFS
498 img = &priv->fw->img[IWL_UCODE_WOWLAN];
499 if (!priv->wowlan_sram)
500 priv->wowlan_sram =
501 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
502 GFP_KERNEL);
503
504 if (priv->wowlan_sram)
505 iwl_trans_read_mem(priv->trans, 0x800000,
506 priv->wowlan_sram,
507 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
508 #endif
509
510 /*
511 * This is very strange. The GET_STATUS command is sent but the device
512 * doesn't reply properly, it seems it doesn't close the RBD so one is
513 * always left open ... As a result, we need to send another command
514 * and have to reset the driver afterwards. As we need to switch to
515 * runtime firmware again that'll happen.
516 */
517
518 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
519 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
520 &resume_data);
521
522 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
523 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
524 /* an RBD is left open in the firmware now! */
525
526 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
527 if (ret)
528 goto out_unlock;
529
530 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
531 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
532 struct cfg80211_wowlan_wakeup *wakeup_report;
533
534 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
535
536 if (reasons) {
537 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
538 wakeup.magic_pkt = true;
539 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
540 wakeup.pattern_idx = status_data.pattern_number;
541 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
542 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
543 wakeup.disconnect = true;
544 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
545 wakeup.gtk_rekey_failure = true;
546 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
547 wakeup.eap_identity_req = true;
548 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
549 wakeup.four_way_handshake = true;
550 wakeup_report = &wakeup;
551 } else {
552 wakeup_report = NULL;
553 }
554
555 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
556 }
557
558 priv->wowlan = false;
559
560 iwlagn_prepare_restart(priv);
561
562 memset((void *)&ctx->active, 0, sizeof(ctx->active));
563 iwl_connection_init_rx_config(priv, ctx);
564 iwlagn_set_rxon_chain(priv, ctx);
565
566 out_unlock:
567 mutex_unlock(&priv->mutex);
568 IWL_DEBUG_MAC80211(priv, "leave\n");
569
570 ieee80211_resume_disconnect(vif);
571
572 return 1;
573 }
574
575 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
576 {
577 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
578
579 device_set_wakeup_enable(priv->trans->dev, enabled);
580 }
581 #endif
582
583 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
584 struct ieee80211_tx_control *control,
585 struct sk_buff *skb)
586 {
587 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
588
589 if (iwlagn_tx_skb(priv, control->sta, skb))
590 ieee80211_free_txskb(hw, skb);
591 }
592
593 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
594 struct ieee80211_vif *vif,
595 struct ieee80211_key_conf *keyconf,
596 struct ieee80211_sta *sta,
597 u32 iv32, u16 *phase1key)
598 {
599 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
600
601 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
602 }
603
604 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
605 struct ieee80211_vif *vif,
606 struct ieee80211_sta *sta,
607 struct ieee80211_key_conf *key)
608 {
609 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
610 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
611 struct iwl_rxon_context *ctx = vif_priv->ctx;
612 int ret;
613 bool is_default_wep_key = false;
614
615 IWL_DEBUG_MAC80211(priv, "enter\n");
616
617 if (iwlwifi_mod_params.sw_crypto) {
618 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
619 return -EOPNOTSUPP;
620 }
621
622 switch (key->cipher) {
623 case WLAN_CIPHER_SUITE_TKIP:
624 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
625 /* fall through */
626 case WLAN_CIPHER_SUITE_CCMP:
627 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
628 break;
629 default:
630 break;
631 }
632
633 /*
634 * We could program these keys into the hardware as well, but we
635 * don't expect much multicast traffic in IBSS and having keys
636 * for more stations is probably more useful.
637 *
638 * Mark key TX-only and return 0.
639 */
640 if (vif->type == NL80211_IFTYPE_ADHOC &&
641 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
642 key->hw_key_idx = WEP_INVALID_OFFSET;
643 return 0;
644 }
645
646 /* If they key was TX-only, accept deletion */
647 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
648 return 0;
649
650 mutex_lock(&priv->mutex);
651 iwl_scan_cancel_timeout(priv, 100);
652
653 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
654
655 /*
656 * If we are getting WEP group key and we didn't receive any key mapping
657 * so far, we are in legacy wep mode (group key only), otherwise we are
658 * in 1X mode.
659 * In legacy wep mode, we use another host command to the uCode.
660 */
661 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
662 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
663 if (cmd == SET_KEY)
664 is_default_wep_key = !ctx->key_mapping_keys;
665 else
666 is_default_wep_key =
667 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
668 }
669
670
671 switch (cmd) {
672 case SET_KEY:
673 if (is_default_wep_key) {
674 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
675 break;
676 }
677 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
678 if (ret) {
679 /*
680 * can't add key for RX, but we don't need it
681 * in the device for TX so still return 0
682 */
683 ret = 0;
684 key->hw_key_idx = WEP_INVALID_OFFSET;
685 }
686
687 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
688 break;
689 case DISABLE_KEY:
690 if (is_default_wep_key)
691 ret = iwl_remove_default_wep_key(priv, ctx, key);
692 else
693 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
694
695 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
696 break;
697 default:
698 ret = -EINVAL;
699 }
700
701 mutex_unlock(&priv->mutex);
702 IWL_DEBUG_MAC80211(priv, "leave\n");
703
704 return ret;
705 }
706
707 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
708 struct ieee80211_vif *vif,
709 enum ieee80211_ampdu_mlme_action action,
710 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
711 u8 buf_size)
712 {
713 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
714 int ret = -EINVAL;
715 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
716
717 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
718 sta->addr, tid);
719
720 if (!(priv->nvm_data->sku_cap_11n_enable))
721 return -EACCES;
722
723 IWL_DEBUG_MAC80211(priv, "enter\n");
724 mutex_lock(&priv->mutex);
725
726 switch (action) {
727 case IEEE80211_AMPDU_RX_START:
728 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
729 break;
730 IWL_DEBUG_HT(priv, "start Rx\n");
731 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
732 break;
733 case IEEE80211_AMPDU_RX_STOP:
734 IWL_DEBUG_HT(priv, "stop Rx\n");
735 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
736 break;
737 case IEEE80211_AMPDU_TX_START:
738 if (!priv->trans->ops->txq_enable)
739 break;
740 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
741 break;
742 IWL_DEBUG_HT(priv, "start Tx\n");
743 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
744 break;
745 case IEEE80211_AMPDU_TX_STOP_FLUSH:
746 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
747 IWL_DEBUG_HT(priv, "Flush Tx\n");
748 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
749 break;
750 case IEEE80211_AMPDU_TX_STOP_CONT:
751 IWL_DEBUG_HT(priv, "stop Tx\n");
752 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
753 if ((ret == 0) && (priv->agg_tids_count > 0)) {
754 priv->agg_tids_count--;
755 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
756 priv->agg_tids_count);
757 }
758 if (!priv->agg_tids_count &&
759 priv->hw_params.use_rts_for_aggregation) {
760 /*
761 * switch off RTS/CTS if it was previously enabled
762 */
763 sta_priv->lq_sta.lq.general_params.flags &=
764 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
765 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
766 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
767 }
768 break;
769 case IEEE80211_AMPDU_TX_OPERATIONAL:
770 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
771 break;
772 }
773 mutex_unlock(&priv->mutex);
774 IWL_DEBUG_MAC80211(priv, "leave\n");
775 return ret;
776 }
777
778 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
779 struct ieee80211_vif *vif,
780 struct ieee80211_sta *sta)
781 {
782 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
783 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
784 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
785 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
786 int ret;
787 u8 sta_id;
788
789 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
790 sta->addr);
791 sta_priv->sta_id = IWL_INVALID_STATION;
792
793 atomic_set(&sta_priv->pending_frames, 0);
794 if (vif->type == NL80211_IFTYPE_AP)
795 sta_priv->client = true;
796
797 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
798 is_ap, sta, &sta_id);
799 if (ret) {
800 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
801 sta->addr, ret);
802 /* Should we return success if return code is EEXIST ? */
803 return ret;
804 }
805
806 sta_priv->sta_id = sta_id;
807
808 return 0;
809 }
810
811 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
812 struct ieee80211_vif *vif,
813 struct ieee80211_sta *sta)
814 {
815 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
816 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
817 int ret;
818
819 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
820
821 if (vif->type == NL80211_IFTYPE_STATION) {
822 /*
823 * Station will be removed from device when the RXON
824 * is set to unassociated -- just deactivate it here
825 * to avoid re-programming it.
826 */
827 ret = 0;
828 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
829 } else {
830 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
831 if (ret)
832 IWL_DEBUG_QUIET_RFKILL(priv,
833 "Error removing station %pM\n", sta->addr);
834 }
835 return ret;
836 }
837
838 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
839 struct ieee80211_vif *vif,
840 struct ieee80211_sta *sta,
841 enum ieee80211_sta_state old_state,
842 enum ieee80211_sta_state new_state)
843 {
844 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
845 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
846 enum {
847 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
848 } op = NONE;
849 int ret;
850
851 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
852 sta->addr, old_state, new_state);
853
854 mutex_lock(&priv->mutex);
855 if (vif->type == NL80211_IFTYPE_STATION) {
856 if (old_state == IEEE80211_STA_NOTEXIST &&
857 new_state == IEEE80211_STA_NONE)
858 op = ADD;
859 else if (old_state == IEEE80211_STA_NONE &&
860 new_state == IEEE80211_STA_NOTEXIST)
861 op = REMOVE;
862 else if (old_state == IEEE80211_STA_AUTH &&
863 new_state == IEEE80211_STA_ASSOC)
864 op = HT_RATE_INIT;
865 } else {
866 if (old_state == IEEE80211_STA_AUTH &&
867 new_state == IEEE80211_STA_ASSOC)
868 op = ADD_RATE_INIT;
869 else if (old_state == IEEE80211_STA_ASSOC &&
870 new_state == IEEE80211_STA_AUTH)
871 op = REMOVE;
872 }
873
874 switch (op) {
875 case ADD:
876 ret = iwlagn_mac_sta_add(hw, vif, sta);
877 if (ret)
878 break;
879 /*
880 * Clear the in-progress flag, the AP station entry was added
881 * but we'll initialize LQ only when we've associated (which
882 * would also clear the in-progress flag). This is necessary
883 * in case we never initialize LQ because association fails.
884 */
885 spin_lock_bh(&priv->sta_lock);
886 priv->stations[iwl_sta_id(sta)].used &=
887 ~IWL_STA_UCODE_INPROGRESS;
888 spin_unlock_bh(&priv->sta_lock);
889 break;
890 case REMOVE:
891 ret = iwlagn_mac_sta_remove(hw, vif, sta);
892 break;
893 case ADD_RATE_INIT:
894 ret = iwlagn_mac_sta_add(hw, vif, sta);
895 if (ret)
896 break;
897 /* Initialize rate scaling */
898 IWL_DEBUG_INFO(priv,
899 "Initializing rate scaling for station %pM\n",
900 sta->addr);
901 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
902 ret = 0;
903 break;
904 case HT_RATE_INIT:
905 /* Initialize rate scaling */
906 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
907 if (ret)
908 break;
909 IWL_DEBUG_INFO(priv,
910 "Initializing rate scaling for station %pM\n",
911 sta->addr);
912 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
913 ret = 0;
914 break;
915 default:
916 ret = 0;
917 break;
918 }
919
920 /*
921 * mac80211 might WARN if we fail, but due the way we
922 * (badly) handle hard rfkill, we might fail here
923 */
924 if (iwl_is_rfkill(priv))
925 ret = 0;
926
927 mutex_unlock(&priv->mutex);
928 IWL_DEBUG_MAC80211(priv, "leave\n");
929
930 return ret;
931 }
932
933 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
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 | FIF_PROMISC_IN_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 | FIF_PROMISC_IN_BSS |
1081 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1082 }
1083
1084 static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1085 {
1086 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1087
1088 mutex_lock(&priv->mutex);
1089 IWL_DEBUG_MAC80211(priv, "enter\n");
1090
1091 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1092 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1093 goto done;
1094 }
1095 if (iwl_is_rfkill(priv)) {
1096 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1097 goto done;
1098 }
1099
1100 /*
1101 * mac80211 will not push any more frames for transmit
1102 * until the flush is completed
1103 */
1104 if (drop) {
1105 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1106 if (iwlagn_txfifo_flush(priv, 0)) {
1107 IWL_ERR(priv, "flush request fail\n");
1108 goto done;
1109 }
1110 }
1111 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1112 iwl_trans_wait_tx_queue_empty(priv->trans);
1113 done:
1114 mutex_unlock(&priv->mutex);
1115 IWL_DEBUG_MAC80211(priv, "leave\n");
1116 }
1117
1118 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1119 struct ieee80211_vif *vif,
1120 enum ieee80211_rssi_event rssi_event)
1121 {
1122 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1123
1124 IWL_DEBUG_MAC80211(priv, "enter\n");
1125 mutex_lock(&priv->mutex);
1126
1127 if (priv->lib->bt_params &&
1128 priv->lib->bt_params->advanced_bt_coexist) {
1129 if (rssi_event == RSSI_EVENT_LOW)
1130 priv->bt_enable_pspoll = true;
1131 else if (rssi_event == RSSI_EVENT_HIGH)
1132 priv->bt_enable_pspoll = false;
1133
1134 iwlagn_send_advance_bt_config(priv);
1135 } else {
1136 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1137 "ignoring RSSI callback\n");
1138 }
1139
1140 mutex_unlock(&priv->mutex);
1141 IWL_DEBUG_MAC80211(priv, "leave\n");
1142 }
1143
1144 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1145 struct ieee80211_sta *sta, bool set)
1146 {
1147 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1148
1149 queue_work(priv->workqueue, &priv->beacon_update);
1150
1151 return 0;
1152 }
1153
1154 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1155 struct ieee80211_vif *vif, u16 queue,
1156 const struct ieee80211_tx_queue_params *params)
1157 {
1158 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1159 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1160 struct iwl_rxon_context *ctx = vif_priv->ctx;
1161 int q;
1162
1163 if (WARN_ON(!ctx))
1164 return -EINVAL;
1165
1166 IWL_DEBUG_MAC80211(priv, "enter\n");
1167
1168 if (!iwl_is_ready_rf(priv)) {
1169 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1170 return -EIO;
1171 }
1172
1173 if (queue >= AC_NUM) {
1174 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1175 return 0;
1176 }
1177
1178 q = AC_NUM - 1 - queue;
1179
1180 mutex_lock(&priv->mutex);
1181
1182 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1183 cpu_to_le16(params->cw_min);
1184 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1185 cpu_to_le16(params->cw_max);
1186 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1187 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1188 cpu_to_le16((params->txop * 32));
1189
1190 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1191
1192 mutex_unlock(&priv->mutex);
1193
1194 IWL_DEBUG_MAC80211(priv, "leave\n");
1195 return 0;
1196 }
1197
1198 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1199 {
1200 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1201
1202 return priv->ibss_manager == IWL_IBSS_MANAGER;
1203 }
1204
1205 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1206 {
1207 iwl_connection_init_rx_config(priv, ctx);
1208
1209 iwlagn_set_rxon_chain(priv, ctx);
1210
1211 return iwlagn_commit_rxon(priv, ctx);
1212 }
1213
1214 static int iwl_setup_interface(struct iwl_priv *priv,
1215 struct iwl_rxon_context *ctx)
1216 {
1217 struct ieee80211_vif *vif = ctx->vif;
1218 int err, ac;
1219
1220 lockdep_assert_held(&priv->mutex);
1221
1222 /*
1223 * This variable will be correct only when there's just
1224 * a single context, but all code using it is for hardware
1225 * that supports only one context.
1226 */
1227 priv->iw_mode = vif->type;
1228
1229 ctx->is_active = true;
1230
1231 err = iwl_set_mode(priv, ctx);
1232 if (err) {
1233 if (!ctx->always_active)
1234 ctx->is_active = false;
1235 return err;
1236 }
1237
1238 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1239 vif->type == NL80211_IFTYPE_ADHOC) {
1240 /*
1241 * pretend to have high BT traffic as long as we
1242 * are operating in IBSS mode, as this will cause
1243 * the rate scaling etc. to behave as intended.
1244 */
1245 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1246 }
1247
1248 /* set up queue mappings */
1249 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1250 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1251
1252 if (vif->type == NL80211_IFTYPE_AP)
1253 vif->cab_queue = ctx->mcast_queue;
1254 else
1255 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1256
1257 return 0;
1258 }
1259
1260 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1261 struct ieee80211_vif *vif)
1262 {
1263 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1264 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1265 struct iwl_rxon_context *tmp, *ctx = NULL;
1266 int err;
1267 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1268 bool reset = false;
1269
1270 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1271 viftype, vif->addr);
1272
1273 mutex_lock(&priv->mutex);
1274
1275 if (!iwl_is_ready_rf(priv)) {
1276 IWL_WARN(priv, "Try to add interface when device not ready\n");
1277 err = -EINVAL;
1278 goto out;
1279 }
1280
1281 for_each_context(priv, tmp) {
1282 u32 possible_modes =
1283 tmp->interface_modes | tmp->exclusive_interface_modes;
1284
1285 if (tmp->vif) {
1286 /* On reset we need to add the same interface again */
1287 if (tmp->vif == vif) {
1288 reset = true;
1289 ctx = tmp;
1290 break;
1291 }
1292
1293 /* check if this busy context is exclusive */
1294 if (tmp->exclusive_interface_modes &
1295 BIT(tmp->vif->type)) {
1296 err = -EINVAL;
1297 goto out;
1298 }
1299 continue;
1300 }
1301
1302 if (!(possible_modes & BIT(viftype)))
1303 continue;
1304
1305 /* have maybe usable context w/o interface */
1306 ctx = tmp;
1307 break;
1308 }
1309
1310 if (!ctx) {
1311 err = -EOPNOTSUPP;
1312 goto out;
1313 }
1314
1315 vif_priv->ctx = ctx;
1316 ctx->vif = vif;
1317
1318 /*
1319 * In SNIFFER device type, the firmware reports the FCS to
1320 * the host, rather than snipping it off. Unfortunately,
1321 * mac80211 doesn't (yet) provide a per-packet flag for
1322 * this, so that we have to set the hardware flag based
1323 * on the interfaces added. As the monitor interface can
1324 * only be present by itself, and will be removed before
1325 * other interfaces are added, this is safe.
1326 */
1327 if (vif->type == NL80211_IFTYPE_MONITOR)
1328 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1329 else
1330 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1331
1332 err = iwl_setup_interface(priv, ctx);
1333 if (!err || reset)
1334 goto out;
1335
1336 ctx->vif = NULL;
1337 priv->iw_mode = NL80211_IFTYPE_STATION;
1338 out:
1339 mutex_unlock(&priv->mutex);
1340
1341 IWL_DEBUG_MAC80211(priv, "leave\n");
1342 return err;
1343 }
1344
1345 static void iwl_teardown_interface(struct iwl_priv *priv,
1346 struct ieee80211_vif *vif,
1347 bool mode_change)
1348 {
1349 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1350
1351 lockdep_assert_held(&priv->mutex);
1352
1353 if (priv->scan_vif == vif) {
1354 iwl_scan_cancel_timeout(priv, 200);
1355 iwl_force_scan_end(priv);
1356 }
1357
1358 if (!mode_change) {
1359 iwl_set_mode(priv, ctx);
1360 if (!ctx->always_active)
1361 ctx->is_active = false;
1362 }
1363
1364 /*
1365 * When removing the IBSS interface, overwrite the
1366 * BT traffic load with the stored one from the last
1367 * notification, if any. If this is a device that
1368 * doesn't implement this, this has no effect since
1369 * both values are the same and zero.
1370 */
1371 if (vif->type == NL80211_IFTYPE_ADHOC)
1372 priv->bt_traffic_load = priv->last_bt_traffic_load;
1373 }
1374
1375 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1376 struct ieee80211_vif *vif)
1377 {
1378 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1379 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1380
1381 IWL_DEBUG_MAC80211(priv, "enter\n");
1382
1383 mutex_lock(&priv->mutex);
1384
1385 if (WARN_ON(ctx->vif != vif)) {
1386 struct iwl_rxon_context *tmp;
1387 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1388 for_each_context(priv, tmp)
1389 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1390 tmp->ctxid, tmp, tmp->vif);
1391 }
1392 ctx->vif = NULL;
1393
1394 iwl_teardown_interface(priv, vif, false);
1395
1396 mutex_unlock(&priv->mutex);
1397
1398 IWL_DEBUG_MAC80211(priv, "leave\n");
1399
1400 }
1401
1402 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1403 struct ieee80211_vif *vif,
1404 enum nl80211_iftype newtype, bool newp2p)
1405 {
1406 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1407 struct iwl_rxon_context *ctx, *tmp;
1408 enum nl80211_iftype newviftype = newtype;
1409 u32 interface_modes;
1410 int err;
1411
1412 IWL_DEBUG_MAC80211(priv, "enter\n");
1413
1414 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1415
1416 mutex_lock(&priv->mutex);
1417
1418 ctx = iwl_rxon_ctx_from_vif(vif);
1419
1420 /*
1421 * To simplify this code, only support changes on the
1422 * BSS context. The PAN context is usually reassigned
1423 * by creating/removing P2P interfaces anyway.
1424 */
1425 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1426 err = -EBUSY;
1427 goto out;
1428 }
1429
1430 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1431 /*
1432 * Huh? But wait ... this can maybe happen when
1433 * we're in the middle of a firmware restart!
1434 */
1435 err = -EBUSY;
1436 goto out;
1437 }
1438
1439 /* Check if the switch is supported in the same context */
1440 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1441 if (!(interface_modes & BIT(newtype))) {
1442 err = -EBUSY;
1443 goto out;
1444 }
1445
1446 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1447 for_each_context(priv, tmp) {
1448 if (ctx == tmp)
1449 continue;
1450
1451 if (!tmp->is_active)
1452 continue;
1453
1454 /*
1455 * The current mode switch would be exclusive, but
1456 * another context is active ... refuse the switch.
1457 */
1458 err = -EBUSY;
1459 goto out;
1460 }
1461 }
1462
1463 /* success */
1464 iwl_teardown_interface(priv, vif, true);
1465 vif->type = newviftype;
1466 vif->p2p = newp2p;
1467 err = iwl_setup_interface(priv, ctx);
1468 WARN_ON(err);
1469 /*
1470 * We've switched internally, but submitting to the
1471 * device may have failed for some reason. Mask this
1472 * error, because otherwise mac80211 will not switch
1473 * (and set the interface type back) and we'll be
1474 * out of sync with it.
1475 */
1476 err = 0;
1477
1478 out:
1479 mutex_unlock(&priv->mutex);
1480 IWL_DEBUG_MAC80211(priv, "leave\n");
1481
1482 return err;
1483 }
1484
1485 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1486 struct ieee80211_vif *vif,
1487 struct cfg80211_scan_request *req)
1488 {
1489 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
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 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 .rssi_callback = iwlagn_mac_rssi_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 }
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