1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 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/slab.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/delay.h>
34 #include <linux/sched.h>
35 #include <linux/skbuff.h>
36 #include <linux/netdevice.h>
37 #include <linux/etherdevice.h>
38 #include <linux/if_arp.h>
39
40 #include <net/ieee80211_radiotap.h>
41 #include <net/mac80211.h>
42
43 #include <asm/div64.h>
44
45 #include "iwl-io.h"
46 #include "iwl-trans.h"
47 #include "iwl-op-mode.h"
48 #include "iwl-modparams.h"
49
50 #include "dev.h"
51 #include "calib.h"
52 #include "agn.h"
53
54 /*****************************************************************************
55 *
56 * mac80211 entry point functions
57 *
58 *****************************************************************************/
59
60 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
61 {
62 .max = 1,
63 .types = BIT(NL80211_IFTYPE_STATION),
64 },
65 {
66 .max = 1,
67 .types = BIT(NL80211_IFTYPE_AP),
68 },
69 };
70
71 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
72 {
73 .max = 2,
74 .types = BIT(NL80211_IFTYPE_STATION),
75 },
76 };
77
78 static const struct ieee80211_iface_combination
79 iwlagn_iface_combinations_dualmode[] = {
80 { .num_different_channels = 1,
81 .max_interfaces = 2,
82 .beacon_int_infra_match = true,
83 .limits = iwlagn_sta_ap_limits,
84 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
85 },
86 { .num_different_channels = 1,
87 .max_interfaces = 2,
88 .limits = iwlagn_2sta_limits,
89 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
90 },
91 };
92
93 /*
94 * Not a mac80211 entry point function, but it fits in with all the
95 * other mac80211 functions grouped here.
96 */
iwlagn_mac_setup_register(struct iwl_priv * priv,const struct iwl_ucode_capabilities * capa)97 int iwlagn_mac_setup_register(struct iwl_priv *priv,
98 const struct iwl_ucode_capabilities *capa)
99 {
100 int ret;
101 struct ieee80211_hw *hw = priv->hw;
102 struct iwl_rxon_context *ctx;
103
104 hw->rate_control_algorithm = "iwl-agn-rs";
105
106 /* Tell mac80211 our characteristics */
107 hw->flags = IEEE80211_HW_SIGNAL_DBM |
108 IEEE80211_HW_AMPDU_AGGREGATION |
109 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
110 IEEE80211_HW_SPECTRUM_MGMT |
111 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
112 IEEE80211_HW_QUEUE_CONTROL |
113 IEEE80211_HW_SUPPORTS_PS |
114 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
115 IEEE80211_HW_WANT_MONITOR_VIF;
116
117 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
118 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
119
120 /*
121 * Including the following line will crash some AP's. This
122 * workaround removes the stimulus which causes the crash until
123 * the AP software can be fixed.
124 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
125 */
126
127 if (priv->nvm_data->sku_cap_11n_enable)
128 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
129 NL80211_FEATURE_STATIC_SMPS;
130
131 /*
132 * Enable 11w if advertised by firmware and software crypto
133 * is not enabled (as the firmware will interpret some mgmt
134 * packets, so enabling it with software crypto isn't safe)
135 */
136 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
137 !iwlwifi_mod_params.sw_crypto)
138 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
139
140 hw->sta_data_size = sizeof(struct iwl_station_priv);
141 hw->vif_data_size = sizeof(struct iwl_vif_priv);
142
143 for_each_context(priv, ctx) {
144 hw->wiphy->interface_modes |= ctx->interface_modes;
145 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
146 }
147
148 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
149
150 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
151 hw->wiphy->iface_combinations =
152 iwlagn_iface_combinations_dualmode;
153 hw->wiphy->n_iface_combinations =
154 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
155 }
156
157 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
158 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
159 REGULATORY_DISABLE_BEACON_HINTS;
160
161 #ifdef CONFIG_PM_SLEEP
162 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
163 priv->trans->ops->d3_suspend &&
164 priv->trans->ops->d3_resume &&
165 device_can_wakeup(priv->trans->dev)) {
166 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
167 WIPHY_WOWLAN_DISCONNECT |
168 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
169 WIPHY_WOWLAN_RFKILL_RELEASE;
170 if (!iwlwifi_mod_params.sw_crypto)
171 priv->wowlan_support.flags |=
172 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
173 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
174
175 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
176 priv->wowlan_support.pattern_min_len =
177 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
178 priv->wowlan_support.pattern_max_len =
179 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
180 hw->wiphy->wowlan = &priv->wowlan_support;
181 }
182 #endif
183
184 if (iwlwifi_mod_params.power_save)
185 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
186 else
187 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
188
189 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
190 /* we create the 802.11 header and a max-length SSID element */
191 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
192
193 /*
194 * We don't use all queues: 4 and 9 are unused and any
195 * aggregation queue gets mapped down to the AC queue.
196 */
197 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
198
199 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
200
201 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
202 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
203 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
204 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
205 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
206 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
207
208 hw->wiphy->hw_version = priv->trans->hw_id;
209
210 iwl_leds_init(priv);
211
212 ret = ieee80211_register_hw(priv->hw);
213 if (ret) {
214 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
215 iwl_leds_exit(priv);
216 return ret;
217 }
218 priv->mac80211_registered = 1;
219
220 return 0;
221 }
222
iwlagn_mac_unregister(struct iwl_priv * priv)223 void iwlagn_mac_unregister(struct iwl_priv *priv)
224 {
225 if (!priv->mac80211_registered)
226 return;
227 iwl_leds_exit(priv);
228 ieee80211_unregister_hw(priv->hw);
229 priv->mac80211_registered = 0;
230 }
231
__iwl_up(struct iwl_priv * priv)232 static int __iwl_up(struct iwl_priv *priv)
233 {
234 struct iwl_rxon_context *ctx;
235 int ret;
236
237 lockdep_assert_held(&priv->mutex);
238
239 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
240 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
241 return -EIO;
242 }
243
244 for_each_context(priv, ctx) {
245 ret = iwlagn_alloc_bcast_station(priv, ctx);
246 if (ret) {
247 iwl_dealloc_bcast_stations(priv);
248 return ret;
249 }
250 }
251
252 ret = iwl_run_init_ucode(priv);
253 if (ret) {
254 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
255 goto error;
256 }
257
258 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
259 if (ret) {
260 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
261 goto error;
262 }
263
264 ret = iwl_alive_start(priv);
265 if (ret)
266 goto error;
267 return 0;
268
269 error:
270 set_bit(STATUS_EXIT_PENDING, &priv->status);
271 iwl_down(priv);
272 clear_bit(STATUS_EXIT_PENDING, &priv->status);
273
274 IWL_ERR(priv, "Unable to initialize device.\n");
275 return ret;
276 }
277
iwlagn_mac_start(struct ieee80211_hw * hw)278 static int iwlagn_mac_start(struct ieee80211_hw *hw)
279 {
280 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
281 int ret;
282
283 IWL_DEBUG_MAC80211(priv, "enter\n");
284
285 /* we should be verifying the device is ready to be opened */
286 mutex_lock(&priv->mutex);
287 ret = __iwl_up(priv);
288 mutex_unlock(&priv->mutex);
289 if (ret)
290 return ret;
291
292 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
293
294 /* Now we should be done, and the READY bit should be set. */
295 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
296 ret = -EIO;
297
298 iwlagn_led_enable(priv);
299
300 priv->is_open = 1;
301 IWL_DEBUG_MAC80211(priv, "leave\n");
302 return 0;
303 }
304
iwlagn_mac_stop(struct ieee80211_hw * hw)305 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
306 {
307 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
308
309 IWL_DEBUG_MAC80211(priv, "enter\n");
310
311 if (!priv->is_open)
312 return;
313
314 priv->is_open = 0;
315
316 mutex_lock(&priv->mutex);
317 iwl_down(priv);
318 mutex_unlock(&priv->mutex);
319
320 iwl_cancel_deferred_work(priv);
321
322 flush_workqueue(priv->workqueue);
323
324 IWL_DEBUG_MAC80211(priv, "leave\n");
325 }
326
iwlagn_mac_set_rekey_data(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct cfg80211_gtk_rekey_data * data)327 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
328 struct ieee80211_vif *vif,
329 struct cfg80211_gtk_rekey_data *data)
330 {
331 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
332
333 if (iwlwifi_mod_params.sw_crypto)
334 return;
335
336 IWL_DEBUG_MAC80211(priv, "enter\n");
337 mutex_lock(&priv->mutex);
338
339 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
340 goto out;
341
342 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
343 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
344 priv->replay_ctr =
345 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
346 priv->have_rekey_data = true;
347
348 out:
349 mutex_unlock(&priv->mutex);
350 IWL_DEBUG_MAC80211(priv, "leave\n");
351 }
352
353 #ifdef CONFIG_PM_SLEEP
354
iwlagn_mac_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)355 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
356 struct cfg80211_wowlan *wowlan)
357 {
358 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
359 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
360 int ret;
361
362 if (WARN_ON(!wowlan))
363 return -EINVAL;
364
365 IWL_DEBUG_MAC80211(priv, "enter\n");
366 mutex_lock(&priv->mutex);
367
368 /* Don't attempt WoWLAN when not associated, tear down instead. */
369 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
370 !iwl_is_associated_ctx(ctx)) {
371 ret = 1;
372 goto out;
373 }
374
375 ret = iwlagn_suspend(priv, wowlan);
376 if (ret)
377 goto error;
378
379 /* let the ucode operate on its own */
380 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
381 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
382
383 iwl_trans_d3_suspend(priv->trans, false);
384
385 goto out;
386
387 error:
388 priv->wowlan = false;
389 iwlagn_prepare_restart(priv);
390 ieee80211_restart_hw(priv->hw);
391 out:
392 mutex_unlock(&priv->mutex);
393 IWL_DEBUG_MAC80211(priv, "leave\n");
394
395 return ret;
396 }
397
398 struct iwl_resume_data {
399 struct iwl_priv *priv;
400 struct iwlagn_wowlan_status *cmd;
401 bool valid;
402 };
403
iwl_resume_status_fn(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)404 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
405 struct iwl_rx_packet *pkt, void *data)
406 {
407 struct iwl_resume_data *resume_data = data;
408 struct iwl_priv *priv = resume_data->priv;
409
410 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
411 IWL_ERR(priv, "rx wrong size data\n");
412 return true;
413 }
414 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
415 resume_data->valid = true;
416
417 return true;
418 }
419
iwlagn_mac_resume(struct ieee80211_hw * hw)420 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
421 {
422 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
423 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
424 struct ieee80211_vif *vif;
425 u32 base;
426 int ret;
427 enum iwl_d3_status d3_status;
428 struct error_table_start {
429 /* cf. struct iwl_error_event_table */
430 u32 valid;
431 u32 error_id;
432 } err_info;
433 struct iwl_notification_wait status_wait;
434 static const u8 status_cmd[] = {
435 REPLY_WOWLAN_GET_STATUS,
436 };
437 struct iwlagn_wowlan_status status_data = {};
438 struct iwl_resume_data resume_data = {
439 .priv = priv,
440 .cmd = &status_data,
441 .valid = false,
442 };
443 struct cfg80211_wowlan_wakeup wakeup = {
444 .pattern_idx = -1,
445 };
446 #ifdef CONFIG_IWLWIFI_DEBUGFS
447 const struct fw_img *img;
448 #endif
449
450 IWL_DEBUG_MAC80211(priv, "enter\n");
451 mutex_lock(&priv->mutex);
452
453 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
454 vif = ctx->vif;
455
456 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false);
457 if (ret)
458 goto out_unlock;
459
460 if (d3_status != IWL_D3_STATUS_ALIVE) {
461 IWL_INFO(priv, "Device was reset during suspend\n");
462 goto out_unlock;
463 }
464
465 /* uCode is no longer operating by itself */
466 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
467 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
468
469 base = priv->device_pointers.error_event_table;
470 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
471 IWL_WARN(priv, "Invalid error table during resume!\n");
472 goto out_unlock;
473 }
474
475 iwl_trans_read_mem_bytes(priv->trans, base,
476 &err_info, sizeof(err_info));
477
478 if (err_info.valid) {
479 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
480 err_info.valid, err_info.error_id);
481 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
482 wakeup.rfkill_release = true;
483 ieee80211_report_wowlan_wakeup(vif, &wakeup,
484 GFP_KERNEL);
485 }
486 goto out_unlock;
487 }
488
489 #ifdef CONFIG_IWLWIFI_DEBUGFS
490 img = &priv->fw->img[IWL_UCODE_WOWLAN];
491 if (!priv->wowlan_sram)
492 priv->wowlan_sram =
493 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
494 GFP_KERNEL);
495
496 if (priv->wowlan_sram)
497 iwl_trans_read_mem(priv->trans, 0x800000,
498 priv->wowlan_sram,
499 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
500 #endif
501
502 /*
503 * This is very strange. The GET_STATUS command is sent but the device
504 * doesn't reply properly, it seems it doesn't close the RBD so one is
505 * always left open ... As a result, we need to send another command
506 * and have to reset the driver afterwards. As we need to switch to
507 * runtime firmware again that'll happen.
508 */
509
510 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
511 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
512 &resume_data);
513
514 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
515 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
516 /* an RBD is left open in the firmware now! */
517
518 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
519 if (ret)
520 goto out_unlock;
521
522 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
523 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
524 struct cfg80211_wowlan_wakeup *wakeup_report;
525
526 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
527
528 if (reasons) {
529 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
530 wakeup.magic_pkt = true;
531 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
532 wakeup.pattern_idx = status_data.pattern_number;
533 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
534 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
535 wakeup.disconnect = true;
536 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
537 wakeup.gtk_rekey_failure = true;
538 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
539 wakeup.eap_identity_req = true;
540 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
541 wakeup.four_way_handshake = true;
542 wakeup_report = &wakeup;
543 } else {
544 wakeup_report = NULL;
545 }
546
547 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
548 }
549
550 priv->wowlan = false;
551
552 iwlagn_prepare_restart(priv);
553
554 memset((void *)&ctx->active, 0, sizeof(ctx->active));
555 iwl_connection_init_rx_config(priv, ctx);
556 iwlagn_set_rxon_chain(priv, ctx);
557
558 out_unlock:
559 mutex_unlock(&priv->mutex);
560 IWL_DEBUG_MAC80211(priv, "leave\n");
561
562 ieee80211_resume_disconnect(vif);
563
564 return 1;
565 }
566
iwlagn_mac_set_wakeup(struct ieee80211_hw * hw,bool enabled)567 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
568 {
569 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
570
571 device_set_wakeup_enable(priv->trans->dev, enabled);
572 }
573 #endif
574
iwlagn_mac_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)575 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
576 struct ieee80211_tx_control *control,
577 struct sk_buff *skb)
578 {
579 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
580
581 if (iwlagn_tx_skb(priv, control->sta, skb))
582 ieee80211_free_txskb(hw, skb);
583 }
584
iwlagn_mac_update_tkip_key(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta,u32 iv32,u16 * phase1key)585 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
586 struct ieee80211_vif *vif,
587 struct ieee80211_key_conf *keyconf,
588 struct ieee80211_sta *sta,
589 u32 iv32, u16 *phase1key)
590 {
591 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
592
593 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
594 }
595
iwlagn_mac_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)596 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
597 struct ieee80211_vif *vif,
598 struct ieee80211_sta *sta,
599 struct ieee80211_key_conf *key)
600 {
601 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
602 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
603 struct iwl_rxon_context *ctx = vif_priv->ctx;
604 int ret;
605 bool is_default_wep_key = false;
606
607 IWL_DEBUG_MAC80211(priv, "enter\n");
608
609 if (iwlwifi_mod_params.sw_crypto) {
610 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
611 return -EOPNOTSUPP;
612 }
613
614 switch (key->cipher) {
615 case WLAN_CIPHER_SUITE_TKIP:
616 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
617 /* fall through */
618 case WLAN_CIPHER_SUITE_CCMP:
619 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
620 break;
621 default:
622 break;
623 }
624
625 /*
626 * We could program these keys into the hardware as well, but we
627 * don't expect much multicast traffic in IBSS and having keys
628 * for more stations is probably more useful.
629 *
630 * Mark key TX-only and return 0.
631 */
632 if (vif->type == NL80211_IFTYPE_ADHOC &&
633 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
634 key->hw_key_idx = WEP_INVALID_OFFSET;
635 return 0;
636 }
637
638 /* If they key was TX-only, accept deletion */
639 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
640 return 0;
641
642 mutex_lock(&priv->mutex);
643 iwl_scan_cancel_timeout(priv, 100);
644
645 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
646
647 /*
648 * If we are getting WEP group key and we didn't receive any key mapping
649 * so far, we are in legacy wep mode (group key only), otherwise we are
650 * in 1X mode.
651 * In legacy wep mode, we use another host command to the uCode.
652 */
653 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
654 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
655 if (cmd == SET_KEY)
656 is_default_wep_key = !ctx->key_mapping_keys;
657 else
658 is_default_wep_key =
659 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
660 }
661
662
663 switch (cmd) {
664 case SET_KEY:
665 if (is_default_wep_key) {
666 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
667 break;
668 }
669 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
670 if (ret) {
671 /*
672 * can't add key for RX, but we don't need it
673 * in the device for TX so still return 0
674 */
675 ret = 0;
676 key->hw_key_idx = WEP_INVALID_OFFSET;
677 }
678
679 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
680 break;
681 case DISABLE_KEY:
682 if (is_default_wep_key)
683 ret = iwl_remove_default_wep_key(priv, ctx, key);
684 else
685 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
686
687 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
688 break;
689 default:
690 ret = -EINVAL;
691 }
692
693 mutex_unlock(&priv->mutex);
694 IWL_DEBUG_MAC80211(priv, "leave\n");
695
696 return ret;
697 }
698
iwl_enable_rx_ampdu(const struct iwl_cfg * cfg)699 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
700 {
701 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
702 return false;
703 return true;
704 }
705
iwl_enable_tx_ampdu(const struct iwl_cfg * cfg)706 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
707 {
708 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
709 return false;
710 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
711 return true;
712
713 /* disabled by default */
714 return false;
715 }
716
iwlagn_mac_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum ieee80211_ampdu_mlme_action action,struct ieee80211_sta * sta,u16 tid,u16 * ssn,u8 buf_size)717 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
718 struct ieee80211_vif *vif,
719 enum ieee80211_ampdu_mlme_action action,
720 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
721 u8 buf_size)
722 {
723 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
724 int ret = -EINVAL;
725 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
726
727 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
728 sta->addr, tid);
729
730 if (!(priv->nvm_data->sku_cap_11n_enable))
731 return -EACCES;
732
733 IWL_DEBUG_MAC80211(priv, "enter\n");
734 mutex_lock(&priv->mutex);
735
736 switch (action) {
737 case IEEE80211_AMPDU_RX_START:
738 if (!iwl_enable_rx_ampdu(priv->cfg))
739 break;
740 IWL_DEBUG_HT(priv, "start Rx\n");
741 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
742 break;
743 case IEEE80211_AMPDU_RX_STOP:
744 IWL_DEBUG_HT(priv, "stop Rx\n");
745 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
746 break;
747 case IEEE80211_AMPDU_TX_START:
748 if (!priv->trans->ops->txq_enable)
749 break;
750 if (!iwl_enable_tx_ampdu(priv->cfg))
751 break;
752 IWL_DEBUG_HT(priv, "start Tx\n");
753 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
754 break;
755 case IEEE80211_AMPDU_TX_STOP_FLUSH:
756 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
757 IWL_DEBUG_HT(priv, "Flush Tx\n");
758 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
759 break;
760 case IEEE80211_AMPDU_TX_STOP_CONT:
761 IWL_DEBUG_HT(priv, "stop Tx\n");
762 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
763 if ((ret == 0) && (priv->agg_tids_count > 0)) {
764 priv->agg_tids_count--;
765 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
766 priv->agg_tids_count);
767 }
768 if (!priv->agg_tids_count &&
769 priv->hw_params.use_rts_for_aggregation) {
770 /*
771 * switch off RTS/CTS if it was previously enabled
772 */
773 sta_priv->lq_sta.lq.general_params.flags &=
774 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
775 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
776 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
777 }
778 break;
779 case IEEE80211_AMPDU_TX_OPERATIONAL:
780 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
781 break;
782 }
783 mutex_unlock(&priv->mutex);
784 IWL_DEBUG_MAC80211(priv, "leave\n");
785 return ret;
786 }
787
iwlagn_mac_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)788 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
789 struct ieee80211_vif *vif,
790 struct ieee80211_sta *sta)
791 {
792 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
793 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
794 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
795 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
796 int ret;
797 u8 sta_id;
798
799 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
800 sta->addr);
801 sta_priv->sta_id = IWL_INVALID_STATION;
802
803 atomic_set(&sta_priv->pending_frames, 0);
804 if (vif->type == NL80211_IFTYPE_AP)
805 sta_priv->client = true;
806
807 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
808 is_ap, sta, &sta_id);
809 if (ret) {
810 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
811 sta->addr, ret);
812 /* Should we return success if return code is EEXIST ? */
813 return ret;
814 }
815
816 sta_priv->sta_id = sta_id;
817
818 return 0;
819 }
820
iwlagn_mac_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)821 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
822 struct ieee80211_vif *vif,
823 struct ieee80211_sta *sta)
824 {
825 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
826 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
827 int ret;
828
829 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
830
831 if (vif->type == NL80211_IFTYPE_STATION) {
832 /*
833 * Station will be removed from device when the RXON
834 * is set to unassociated -- just deactivate it here
835 * to avoid re-programming it.
836 */
837 ret = 0;
838 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
839 } else {
840 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
841 if (ret)
842 IWL_DEBUG_QUIET_RFKILL(priv,
843 "Error removing station %pM\n", sta->addr);
844 }
845 return ret;
846 }
847
iwlagn_mac_sta_state(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta,enum ieee80211_sta_state old_state,enum ieee80211_sta_state new_state)848 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
849 struct ieee80211_vif *vif,
850 struct ieee80211_sta *sta,
851 enum ieee80211_sta_state old_state,
852 enum ieee80211_sta_state new_state)
853 {
854 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
855 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
856 enum {
857 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
858 } op = NONE;
859 int ret;
860
861 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
862 sta->addr, old_state, new_state);
863
864 mutex_lock(&priv->mutex);
865 if (vif->type == NL80211_IFTYPE_STATION) {
866 if (old_state == IEEE80211_STA_NOTEXIST &&
867 new_state == IEEE80211_STA_NONE)
868 op = ADD;
869 else if (old_state == IEEE80211_STA_NONE &&
870 new_state == IEEE80211_STA_NOTEXIST)
871 op = REMOVE;
872 else if (old_state == IEEE80211_STA_AUTH &&
873 new_state == IEEE80211_STA_ASSOC)
874 op = HT_RATE_INIT;
875 } else {
876 if (old_state == IEEE80211_STA_AUTH &&
877 new_state == IEEE80211_STA_ASSOC)
878 op = ADD_RATE_INIT;
879 else if (old_state == IEEE80211_STA_ASSOC &&
880 new_state == IEEE80211_STA_AUTH)
881 op = REMOVE;
882 }
883
884 switch (op) {
885 case ADD:
886 ret = iwlagn_mac_sta_add(hw, vif, sta);
887 if (ret)
888 break;
889 /*
890 * Clear the in-progress flag, the AP station entry was added
891 * but we'll initialize LQ only when we've associated (which
892 * would also clear the in-progress flag). This is necessary
893 * in case we never initialize LQ because association fails.
894 */
895 spin_lock_bh(&priv->sta_lock);
896 priv->stations[iwl_sta_id(sta)].used &=
897 ~IWL_STA_UCODE_INPROGRESS;
898 spin_unlock_bh(&priv->sta_lock);
899 break;
900 case REMOVE:
901 ret = iwlagn_mac_sta_remove(hw, vif, sta);
902 break;
903 case ADD_RATE_INIT:
904 ret = iwlagn_mac_sta_add(hw, vif, sta);
905 if (ret)
906 break;
907 /* Initialize rate scaling */
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 case HT_RATE_INIT:
915 /* Initialize rate scaling */
916 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
917 if (ret)
918 break;
919 IWL_DEBUG_INFO(priv,
920 "Initializing rate scaling for station %pM\n",
921 sta->addr);
922 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
923 ret = 0;
924 break;
925 default:
926 ret = 0;
927 break;
928 }
929
930 /*
931 * mac80211 might WARN if we fail, but due the way we
932 * (badly) handle hard rfkill, we might fail here
933 */
934 if (iwl_is_rfkill(priv))
935 ret = 0;
936
937 mutex_unlock(&priv->mutex);
938 IWL_DEBUG_MAC80211(priv, "leave\n");
939
940 return ret;
941 }
942
iwlagn_mac_channel_switch(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_channel_switch * ch_switch)943 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
944 struct ieee80211_vif *vif,
945 struct ieee80211_channel_switch *ch_switch)
946 {
947 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
948 struct ieee80211_conf *conf = &hw->conf;
949 struct ieee80211_channel *channel = ch_switch->chandef.chan;
950 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
951 /*
952 * MULTI-FIXME
953 * When we add support for multiple interfaces, we need to
954 * revisit this. The channel switch command in the device
955 * only affects the BSS context, but what does that really
956 * mean? And what if we get a CSA on the second interface?
957 * This needs a lot of work.
958 */
959 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
960 u16 ch;
961
962 IWL_DEBUG_MAC80211(priv, "enter\n");
963
964 mutex_lock(&priv->mutex);
965
966 if (iwl_is_rfkill(priv))
967 goto out;
968
969 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
970 test_bit(STATUS_SCANNING, &priv->status) ||
971 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
972 goto out;
973
974 if (!iwl_is_associated_ctx(ctx))
975 goto out;
976
977 if (!priv->lib->set_channel_switch)
978 goto out;
979
980 ch = channel->hw_value;
981 if (le16_to_cpu(ctx->active.channel) == ch)
982 goto out;
983
984 priv->current_ht_config.smps = conf->smps_mode;
985
986 /* Configure HT40 channels */
987 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
988 case NL80211_CHAN_NO_HT:
989 case NL80211_CHAN_HT20:
990 ctx->ht.is_40mhz = false;
991 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
992 break;
993 case NL80211_CHAN_HT40MINUS:
994 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
995 ctx->ht.is_40mhz = true;
996 break;
997 case NL80211_CHAN_HT40PLUS:
998 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
999 ctx->ht.is_40mhz = true;
1000 break;
1001 }
1002
1003 if ((le16_to_cpu(ctx->staging.channel) != ch))
1004 ctx->staging.flags = 0;
1005
1006 iwl_set_rxon_channel(priv, channel, ctx);
1007 iwl_set_rxon_ht(priv, ht_conf);
1008 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1009
1010 /*
1011 * at this point, staging_rxon has the
1012 * configuration for channel switch
1013 */
1014 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1015 priv->switch_channel = cpu_to_le16(ch);
1016 if (priv->lib->set_channel_switch(priv, ch_switch)) {
1017 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1018 priv->switch_channel = 0;
1019 ieee80211_chswitch_done(ctx->vif, false);
1020 }
1021
1022 out:
1023 mutex_unlock(&priv->mutex);
1024 IWL_DEBUG_MAC80211(priv, "leave\n");
1025 }
1026
iwl_chswitch_done(struct iwl_priv * priv,bool is_success)1027 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1028 {
1029 /*
1030 * MULTI-FIXME
1031 * See iwlagn_mac_channel_switch.
1032 */
1033 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1034
1035 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1036 return;
1037
1038 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1039 return;
1040
1041 if (ctx->vif)
1042 ieee80211_chswitch_done(ctx->vif, is_success);
1043 }
1044
iwlagn_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)1045 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1046 unsigned int changed_flags,
1047 unsigned int *total_flags,
1048 u64 multicast)
1049 {
1050 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1051 __le32 filter_or = 0, filter_nand = 0;
1052 struct iwl_rxon_context *ctx;
1053
1054 #define CHK(test, flag) do { \
1055 if (*total_flags & (test)) \
1056 filter_or |= (flag); \
1057 else \
1058 filter_nand |= (flag); \
1059 } while (0)
1060
1061 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1062 changed_flags, *total_flags);
1063
1064 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1065 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1066 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1067 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1068
1069 #undef CHK
1070
1071 mutex_lock(&priv->mutex);
1072
1073 for_each_context(priv, ctx) {
1074 ctx->staging.filter_flags &= ~filter_nand;
1075 ctx->staging.filter_flags |= filter_or;
1076
1077 /*
1078 * Not committing directly because hardware can perform a scan,
1079 * but we'll eventually commit the filter flags change anyway.
1080 */
1081 }
1082
1083 mutex_unlock(&priv->mutex);
1084
1085 /*
1086 * Receiving all multicast frames is always enabled by the
1087 * default flags setup in iwl_connection_init_rx_config()
1088 * since we currently do not support programming multicast
1089 * filters into the device.
1090 */
1091 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1092 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1093 }
1094
iwlagn_mac_flush(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 queues,bool drop)1095 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1096 u32 queues, bool drop)
1097 {
1098 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1099 u32 scd_queues;
1100
1101 mutex_lock(&priv->mutex);
1102 IWL_DEBUG_MAC80211(priv, "enter\n");
1103
1104 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1105 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1106 goto done;
1107 }
1108 if (iwl_is_rfkill(priv)) {
1109 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1110 goto done;
1111 }
1112
1113 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
1114 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1115 BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1116
1117 if (drop) {
1118 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1119 scd_queues);
1120 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1121 IWL_ERR(priv, "flush request fail\n");
1122 goto done;
1123 }
1124 }
1125
1126 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1127 iwl_trans_wait_tx_queue_empty(priv->trans, scd_queues);
1128 done:
1129 mutex_unlock(&priv->mutex);
1130 IWL_DEBUG_MAC80211(priv, "leave\n");
1131 }
1132
iwlagn_mac_event_callback(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const struct ieee80211_event * event)1133 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1134 struct ieee80211_vif *vif,
1135 const struct ieee80211_event *event)
1136 {
1137 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1138
1139 if (event->type != RSSI_EVENT)
1140 return;
1141
1142 IWL_DEBUG_MAC80211(priv, "enter\n");
1143 mutex_lock(&priv->mutex);
1144
1145 if (priv->lib->bt_params &&
1146 priv->lib->bt_params->advanced_bt_coexist) {
1147 if (event->u.rssi.data == RSSI_EVENT_LOW)
1148 priv->bt_enable_pspoll = true;
1149 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1150 priv->bt_enable_pspoll = false;
1151
1152 iwlagn_send_advance_bt_config(priv);
1153 } else {
1154 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1155 "ignoring RSSI callback\n");
1156 }
1157
1158 mutex_unlock(&priv->mutex);
1159 IWL_DEBUG_MAC80211(priv, "leave\n");
1160 }
1161
iwlagn_mac_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)1162 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1163 struct ieee80211_sta *sta, bool set)
1164 {
1165 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1166
1167 queue_work(priv->workqueue, &priv->beacon_update);
1168
1169 return 0;
1170 }
1171
iwlagn_mac_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)1172 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1173 struct ieee80211_vif *vif, u16 queue,
1174 const struct ieee80211_tx_queue_params *params)
1175 {
1176 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1177 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1178 struct iwl_rxon_context *ctx = vif_priv->ctx;
1179 int q;
1180
1181 if (WARN_ON(!ctx))
1182 return -EINVAL;
1183
1184 IWL_DEBUG_MAC80211(priv, "enter\n");
1185
1186 if (!iwl_is_ready_rf(priv)) {
1187 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1188 return -EIO;
1189 }
1190
1191 if (queue >= AC_NUM) {
1192 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1193 return 0;
1194 }
1195
1196 q = AC_NUM - 1 - queue;
1197
1198 mutex_lock(&priv->mutex);
1199
1200 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1201 cpu_to_le16(params->cw_min);
1202 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1203 cpu_to_le16(params->cw_max);
1204 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1205 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1206 cpu_to_le16((params->txop * 32));
1207
1208 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1209
1210 mutex_unlock(&priv->mutex);
1211
1212 IWL_DEBUG_MAC80211(priv, "leave\n");
1213 return 0;
1214 }
1215
iwlagn_mac_tx_last_beacon(struct ieee80211_hw * hw)1216 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1217 {
1218 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1219
1220 return priv->ibss_manager == IWL_IBSS_MANAGER;
1221 }
1222
iwl_set_mode(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1223 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1224 {
1225 iwl_connection_init_rx_config(priv, ctx);
1226
1227 iwlagn_set_rxon_chain(priv, ctx);
1228
1229 return iwlagn_commit_rxon(priv, ctx);
1230 }
1231
iwl_setup_interface(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1232 static int iwl_setup_interface(struct iwl_priv *priv,
1233 struct iwl_rxon_context *ctx)
1234 {
1235 struct ieee80211_vif *vif = ctx->vif;
1236 int err, ac;
1237
1238 lockdep_assert_held(&priv->mutex);
1239
1240 /*
1241 * This variable will be correct only when there's just
1242 * a single context, but all code using it is for hardware
1243 * that supports only one context.
1244 */
1245 priv->iw_mode = vif->type;
1246
1247 ctx->is_active = true;
1248
1249 err = iwl_set_mode(priv, ctx);
1250 if (err) {
1251 if (!ctx->always_active)
1252 ctx->is_active = false;
1253 return err;
1254 }
1255
1256 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1257 vif->type == NL80211_IFTYPE_ADHOC) {
1258 /*
1259 * pretend to have high BT traffic as long as we
1260 * are operating in IBSS mode, as this will cause
1261 * the rate scaling etc. to behave as intended.
1262 */
1263 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1264 }
1265
1266 /* set up queue mappings */
1267 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1268 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1269
1270 if (vif->type == NL80211_IFTYPE_AP)
1271 vif->cab_queue = ctx->mcast_queue;
1272 else
1273 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1274
1275 return 0;
1276 }
1277
iwlagn_mac_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1278 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1279 struct ieee80211_vif *vif)
1280 {
1281 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1282 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1283 struct iwl_rxon_context *tmp, *ctx = NULL;
1284 int err;
1285 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1286 bool reset = false;
1287
1288 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1289 viftype, vif->addr);
1290
1291 mutex_lock(&priv->mutex);
1292
1293 if (!iwl_is_ready_rf(priv)) {
1294 IWL_WARN(priv, "Try to add interface when device not ready\n");
1295 err = -EINVAL;
1296 goto out;
1297 }
1298
1299 for_each_context(priv, tmp) {
1300 u32 possible_modes =
1301 tmp->interface_modes | tmp->exclusive_interface_modes;
1302
1303 if (tmp->vif) {
1304 /* On reset we need to add the same interface again */
1305 if (tmp->vif == vif) {
1306 reset = true;
1307 ctx = tmp;
1308 break;
1309 }
1310
1311 /* check if this busy context is exclusive */
1312 if (tmp->exclusive_interface_modes &
1313 BIT(tmp->vif->type)) {
1314 err = -EINVAL;
1315 goto out;
1316 }
1317 continue;
1318 }
1319
1320 if (!(possible_modes & BIT(viftype)))
1321 continue;
1322
1323 /* have maybe usable context w/o interface */
1324 ctx = tmp;
1325 break;
1326 }
1327
1328 if (!ctx) {
1329 err = -EOPNOTSUPP;
1330 goto out;
1331 }
1332
1333 vif_priv->ctx = ctx;
1334 ctx->vif = vif;
1335
1336 /*
1337 * In SNIFFER device type, the firmware reports the FCS to
1338 * the host, rather than snipping it off. Unfortunately,
1339 * mac80211 doesn't (yet) provide a per-packet flag for
1340 * this, so that we have to set the hardware flag based
1341 * on the interfaces added. As the monitor interface can
1342 * only be present by itself, and will be removed before
1343 * other interfaces are added, this is safe.
1344 */
1345 if (vif->type == NL80211_IFTYPE_MONITOR)
1346 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1347 else
1348 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1349
1350 err = iwl_setup_interface(priv, ctx);
1351 if (!err || reset)
1352 goto out;
1353
1354 ctx->vif = NULL;
1355 priv->iw_mode = NL80211_IFTYPE_STATION;
1356 out:
1357 mutex_unlock(&priv->mutex);
1358
1359 IWL_DEBUG_MAC80211(priv, "leave\n");
1360 return err;
1361 }
1362
iwl_teardown_interface(struct iwl_priv * priv,struct ieee80211_vif * vif,bool mode_change)1363 static void iwl_teardown_interface(struct iwl_priv *priv,
1364 struct ieee80211_vif *vif,
1365 bool mode_change)
1366 {
1367 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1368
1369 lockdep_assert_held(&priv->mutex);
1370
1371 if (priv->scan_vif == vif) {
1372 iwl_scan_cancel_timeout(priv, 200);
1373 iwl_force_scan_end(priv);
1374 }
1375
1376 if (!mode_change) {
1377 iwl_set_mode(priv, ctx);
1378 if (!ctx->always_active)
1379 ctx->is_active = false;
1380 }
1381
1382 /*
1383 * When removing the IBSS interface, overwrite the
1384 * BT traffic load with the stored one from the last
1385 * notification, if any. If this is a device that
1386 * doesn't implement this, this has no effect since
1387 * both values are the same and zero.
1388 */
1389 if (vif->type == NL80211_IFTYPE_ADHOC)
1390 priv->bt_traffic_load = priv->last_bt_traffic_load;
1391 }
1392
iwlagn_mac_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1393 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1394 struct ieee80211_vif *vif)
1395 {
1396 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1397 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1398
1399 IWL_DEBUG_MAC80211(priv, "enter\n");
1400
1401 mutex_lock(&priv->mutex);
1402
1403 if (WARN_ON(ctx->vif != vif)) {
1404 struct iwl_rxon_context *tmp;
1405 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1406 for_each_context(priv, tmp)
1407 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1408 tmp->ctxid, tmp, tmp->vif);
1409 }
1410 ctx->vif = NULL;
1411
1412 iwl_teardown_interface(priv, vif, false);
1413
1414 mutex_unlock(&priv->mutex);
1415
1416 IWL_DEBUG_MAC80211(priv, "leave\n");
1417
1418 }
1419
iwlagn_mac_change_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_iftype newtype,bool newp2p)1420 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1421 struct ieee80211_vif *vif,
1422 enum nl80211_iftype newtype, bool newp2p)
1423 {
1424 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1425 struct iwl_rxon_context *ctx, *tmp;
1426 enum nl80211_iftype newviftype = newtype;
1427 u32 interface_modes;
1428 int err;
1429
1430 IWL_DEBUG_MAC80211(priv, "enter\n");
1431
1432 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1433
1434 mutex_lock(&priv->mutex);
1435
1436 ctx = iwl_rxon_ctx_from_vif(vif);
1437
1438 /*
1439 * To simplify this code, only support changes on the
1440 * BSS context. The PAN context is usually reassigned
1441 * by creating/removing P2P interfaces anyway.
1442 */
1443 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1444 err = -EBUSY;
1445 goto out;
1446 }
1447
1448 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1449 /*
1450 * Huh? But wait ... this can maybe happen when
1451 * we're in the middle of a firmware restart!
1452 */
1453 err = -EBUSY;
1454 goto out;
1455 }
1456
1457 /* Check if the switch is supported in the same context */
1458 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1459 if (!(interface_modes & BIT(newtype))) {
1460 err = -EBUSY;
1461 goto out;
1462 }
1463
1464 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1465 for_each_context(priv, tmp) {
1466 if (ctx == tmp)
1467 continue;
1468
1469 if (!tmp->is_active)
1470 continue;
1471
1472 /*
1473 * The current mode switch would be exclusive, but
1474 * another context is active ... refuse the switch.
1475 */
1476 err = -EBUSY;
1477 goto out;
1478 }
1479 }
1480
1481 /* success */
1482 iwl_teardown_interface(priv, vif, true);
1483 vif->type = newviftype;
1484 vif->p2p = newp2p;
1485 err = iwl_setup_interface(priv, ctx);
1486 WARN_ON(err);
1487 /*
1488 * We've switched internally, but submitting to the
1489 * device may have failed for some reason. Mask this
1490 * error, because otherwise mac80211 will not switch
1491 * (and set the interface type back) and we'll be
1492 * out of sync with it.
1493 */
1494 err = 0;
1495
1496 out:
1497 mutex_unlock(&priv->mutex);
1498 IWL_DEBUG_MAC80211(priv, "leave\n");
1499
1500 return err;
1501 }
1502
iwlagn_mac_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_scan_request * hw_req)1503 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1504 struct ieee80211_vif *vif,
1505 struct ieee80211_scan_request *hw_req)
1506 {
1507 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1508 struct cfg80211_scan_request *req = &hw_req->req;
1509 int ret;
1510
1511 IWL_DEBUG_MAC80211(priv, "enter\n");
1512
1513 if (req->n_channels == 0)
1514 return -EINVAL;
1515
1516 mutex_lock(&priv->mutex);
1517
1518 /*
1519 * If an internal scan is in progress, just set
1520 * up the scan_request as per above.
1521 */
1522 if (priv->scan_type != IWL_SCAN_NORMAL) {
1523 IWL_DEBUG_SCAN(priv,
1524 "SCAN request during internal scan - defer\n");
1525 priv->scan_request = req;
1526 priv->scan_vif = vif;
1527 ret = 0;
1528 } else {
1529 priv->scan_request = req;
1530 priv->scan_vif = vif;
1531 /*
1532 * mac80211 will only ask for one band at a time
1533 * so using channels[0] here is ok
1534 */
1535 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1536 req->channels[0]->band);
1537 if (ret) {
1538 priv->scan_request = NULL;
1539 priv->scan_vif = NULL;
1540 }
1541 }
1542
1543 IWL_DEBUG_MAC80211(priv, "leave\n");
1544
1545 mutex_unlock(&priv->mutex);
1546
1547 return ret;
1548 }
1549
iwl_sta_modify_ps_wake(struct iwl_priv * priv,int sta_id)1550 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1551 {
1552 struct iwl_addsta_cmd cmd = {
1553 .mode = STA_CONTROL_MODIFY_MSK,
1554 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1555 .sta.sta_id = sta_id,
1556 };
1557
1558 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1559 }
1560
iwlagn_mac_sta_notify(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum sta_notify_cmd cmd,struct ieee80211_sta * sta)1561 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1562 struct ieee80211_vif *vif,
1563 enum sta_notify_cmd cmd,
1564 struct ieee80211_sta *sta)
1565 {
1566 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1567 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1568 int sta_id;
1569
1570 IWL_DEBUG_MAC80211(priv, "enter\n");
1571
1572 switch (cmd) {
1573 case STA_NOTIFY_SLEEP:
1574 WARN_ON(!sta_priv->client);
1575 sta_priv->asleep = true;
1576 if (atomic_read(&sta_priv->pending_frames) > 0)
1577 ieee80211_sta_block_awake(hw, sta, true);
1578 break;
1579 case STA_NOTIFY_AWAKE:
1580 WARN_ON(!sta_priv->client);
1581 if (!sta_priv->asleep)
1582 break;
1583 sta_priv->asleep = false;
1584 sta_id = iwl_sta_id(sta);
1585 if (sta_id != IWL_INVALID_STATION)
1586 iwl_sta_modify_ps_wake(priv, sta_id);
1587 break;
1588 default:
1589 break;
1590 }
1591 IWL_DEBUG_MAC80211(priv, "leave\n");
1592 }
1593
1594 const struct ieee80211_ops iwlagn_hw_ops = {
1595 .tx = iwlagn_mac_tx,
1596 .start = iwlagn_mac_start,
1597 .stop = iwlagn_mac_stop,
1598 #ifdef CONFIG_PM_SLEEP
1599 .suspend = iwlagn_mac_suspend,
1600 .resume = iwlagn_mac_resume,
1601 .set_wakeup = iwlagn_mac_set_wakeup,
1602 #endif
1603 .add_interface = iwlagn_mac_add_interface,
1604 .remove_interface = iwlagn_mac_remove_interface,
1605 .change_interface = iwlagn_mac_change_interface,
1606 .config = iwlagn_mac_config,
1607 .configure_filter = iwlagn_configure_filter,
1608 .set_key = iwlagn_mac_set_key,
1609 .update_tkip_key = iwlagn_mac_update_tkip_key,
1610 .set_rekey_data = iwlagn_mac_set_rekey_data,
1611 .conf_tx = iwlagn_mac_conf_tx,
1612 .bss_info_changed = iwlagn_bss_info_changed,
1613 .ampdu_action = iwlagn_mac_ampdu_action,
1614 .hw_scan = iwlagn_mac_hw_scan,
1615 .sta_notify = iwlagn_mac_sta_notify,
1616 .sta_state = iwlagn_mac_sta_state,
1617 .channel_switch = iwlagn_mac_channel_switch,
1618 .flush = iwlagn_mac_flush,
1619 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1620 .event_callback = iwlagn_mac_event_callback,
1621 .set_tim = iwlagn_mac_set_tim,
1622 };
1623
1624 /* This function both allocates and initializes hw and priv. */
iwl_alloc_all(void)1625 struct ieee80211_hw *iwl_alloc_all(void)
1626 {
1627 struct iwl_priv *priv;
1628 struct iwl_op_mode *op_mode;
1629 /* mac80211 allocates memory for this device instance, including
1630 * space for this driver's private structure */
1631 struct ieee80211_hw *hw;
1632
1633 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1634 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1635 if (!hw)
1636 goto out;
1637
1638 op_mode = hw->priv;
1639 priv = IWL_OP_MODE_GET_DVM(op_mode);
1640 priv->hw = hw;
1641
1642 out:
1643 return hw;
1644 }
1645