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Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
[deliverable/linux.git] / drivers / net / wireless / intel / iwlwifi / dvm / mac80211.c
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 <linuxwifi@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 */
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 ieee80211_hw_set(hw, SIGNAL_DBM);
108 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
109 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
110 ieee80211_hw_set(hw, SPECTRUM_MGMT);
111 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
112 ieee80211_hw_set(hw, QUEUE_CONTROL);
113 ieee80211_hw_set(hw, SUPPORTS_PS);
114 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
115 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
116 ieee80211_hw_set(hw, WANT_MONITOR_VIF);
117
118 if (priv->trans->max_skb_frags)
119 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
120
121 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
122 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
123
124 /*
125 * Including the following line will crash some AP's. This
126 * workaround removes the stimulus which causes the crash until
127 * the AP software can be fixed.
128 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
129 */
130
131 if (priv->nvm_data->sku_cap_11n_enable)
132 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
133 NL80211_FEATURE_STATIC_SMPS;
134
135 /*
136 * Enable 11w if advertised by firmware and software crypto
137 * is not enabled (as the firmware will interpret some mgmt
138 * packets, so enabling it with software crypto isn't safe)
139 */
140 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
141 !iwlwifi_mod_params.sw_crypto)
142 ieee80211_hw_set(hw, MFP_CAPABLE);
143
144 hw->sta_data_size = sizeof(struct iwl_station_priv);
145 hw->vif_data_size = sizeof(struct iwl_vif_priv);
146
147 for_each_context(priv, ctx) {
148 hw->wiphy->interface_modes |= ctx->interface_modes;
149 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
150 }
151
152 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
153
154 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
155 hw->wiphy->iface_combinations =
156 iwlagn_iface_combinations_dualmode;
157 hw->wiphy->n_iface_combinations =
158 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
159 }
160
161 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
162 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
163 REGULATORY_DISABLE_BEACON_HINTS;
164
165 #ifdef CONFIG_PM_SLEEP
166 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
167 priv->trans->ops->d3_suspend &&
168 priv->trans->ops->d3_resume &&
169 device_can_wakeup(priv->trans->dev)) {
170 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
171 WIPHY_WOWLAN_DISCONNECT |
172 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
173 WIPHY_WOWLAN_RFKILL_RELEASE;
174 if (!iwlwifi_mod_params.sw_crypto)
175 priv->wowlan_support.flags |=
176 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
177 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
178
179 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
180 priv->wowlan_support.pattern_min_len =
181 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
182 priv->wowlan_support.pattern_max_len =
183 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
184 hw->wiphy->wowlan = &priv->wowlan_support;
185 }
186 #endif
187
188 if (iwlwifi_mod_params.power_save)
189 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
190 else
191 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
192
193 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
194 /* we create the 802.11 header and a max-length SSID element */
195 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
196
197 /*
198 * We don't use all queues: 4 and 9 are unused and any
199 * aggregation queue gets mapped down to the AC queue.
200 */
201 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
202
203 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
204
205 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
206 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
207 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
208 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
209 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
210 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
211
212 hw->wiphy->hw_version = priv->trans->hw_id;
213
214 iwl_leds_init(priv);
215
216 ret = ieee80211_register_hw(priv->hw);
217 if (ret) {
218 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
219 iwl_leds_exit(priv);
220 return ret;
221 }
222 priv->mac80211_registered = 1;
223
224 return 0;
225 }
226
227 void iwlagn_mac_unregister(struct iwl_priv *priv)
228 {
229 if (!priv->mac80211_registered)
230 return;
231 iwl_leds_exit(priv);
232 ieee80211_unregister_hw(priv->hw);
233 priv->mac80211_registered = 0;
234 }
235
236 static int __iwl_up(struct iwl_priv *priv)
237 {
238 struct iwl_rxon_context *ctx;
239 int ret;
240
241 lockdep_assert_held(&priv->mutex);
242
243 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
244 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
245 return -EIO;
246 }
247
248 for_each_context(priv, ctx) {
249 ret = iwlagn_alloc_bcast_station(priv, ctx);
250 if (ret) {
251 iwl_dealloc_bcast_stations(priv);
252 return ret;
253 }
254 }
255
256 ret = iwl_trans_start_hw(priv->trans);
257 if (ret) {
258 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
259 goto error;
260 }
261
262 ret = iwl_run_init_ucode(priv);
263 if (ret) {
264 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
265 goto error;
266 }
267
268 ret = iwl_trans_start_hw(priv->trans);
269 if (ret) {
270 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
271 goto error;
272 }
273
274 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
275 if (ret) {
276 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
277 goto error;
278 }
279
280 ret = iwl_alive_start(priv);
281 if (ret)
282 goto error;
283 return 0;
284
285 error:
286 set_bit(STATUS_EXIT_PENDING, &priv->status);
287 iwl_down(priv);
288 clear_bit(STATUS_EXIT_PENDING, &priv->status);
289
290 IWL_ERR(priv, "Unable to initialize device.\n");
291 return ret;
292 }
293
294 static int iwlagn_mac_start(struct ieee80211_hw *hw)
295 {
296 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
297 int ret;
298
299 IWL_DEBUG_MAC80211(priv, "enter\n");
300
301 /* we should be verifying the device is ready to be opened */
302 mutex_lock(&priv->mutex);
303 ret = __iwl_up(priv);
304 mutex_unlock(&priv->mutex);
305 if (ret)
306 return ret;
307
308 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
309
310 /* Now we should be done, and the READY bit should be set. */
311 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
312 ret = -EIO;
313
314 iwlagn_led_enable(priv);
315
316 priv->is_open = 1;
317 IWL_DEBUG_MAC80211(priv, "leave\n");
318 return 0;
319 }
320
321 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
322 {
323 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
324
325 IWL_DEBUG_MAC80211(priv, "enter\n");
326
327 if (!priv->is_open)
328 return;
329
330 priv->is_open = 0;
331
332 mutex_lock(&priv->mutex);
333 iwl_down(priv);
334 mutex_unlock(&priv->mutex);
335
336 iwl_cancel_deferred_work(priv);
337
338 flush_workqueue(priv->workqueue);
339
340 IWL_DEBUG_MAC80211(priv, "leave\n");
341 }
342
343 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
344 struct ieee80211_vif *vif,
345 struct cfg80211_gtk_rekey_data *data)
346 {
347 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
348
349 if (iwlwifi_mod_params.sw_crypto)
350 return;
351
352 IWL_DEBUG_MAC80211(priv, "enter\n");
353 mutex_lock(&priv->mutex);
354
355 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
356 goto out;
357
358 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
359 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
360 priv->replay_ctr =
361 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
362 priv->have_rekey_data = true;
363
364 out:
365 mutex_unlock(&priv->mutex);
366 IWL_DEBUG_MAC80211(priv, "leave\n");
367 }
368
369 #ifdef CONFIG_PM_SLEEP
370
371 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
372 struct cfg80211_wowlan *wowlan)
373 {
374 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
375 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
376 int ret;
377
378 if (WARN_ON(!wowlan))
379 return -EINVAL;
380
381 IWL_DEBUG_MAC80211(priv, "enter\n");
382 mutex_lock(&priv->mutex);
383
384 /* Don't attempt WoWLAN when not associated, tear down instead. */
385 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
386 !iwl_is_associated_ctx(ctx)) {
387 ret = 1;
388 goto out;
389 }
390
391 ret = iwlagn_suspend(priv, wowlan);
392 if (ret)
393 goto error;
394
395 /* let the ucode operate on its own */
396 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
397 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
398
399 iwl_trans_d3_suspend(priv->trans, false, true);
400
401 goto out;
402
403 error:
404 priv->wowlan = false;
405 iwlagn_prepare_restart(priv);
406 ieee80211_restart_hw(priv->hw);
407 out:
408 mutex_unlock(&priv->mutex);
409 IWL_DEBUG_MAC80211(priv, "leave\n");
410
411 return ret;
412 }
413
414 struct iwl_resume_data {
415 struct iwl_priv *priv;
416 struct iwlagn_wowlan_status *cmd;
417 bool valid;
418 };
419
420 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
421 struct iwl_rx_packet *pkt, void *data)
422 {
423 struct iwl_resume_data *resume_data = data;
424 struct iwl_priv *priv = resume_data->priv;
425
426 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
427 IWL_ERR(priv, "rx wrong size data\n");
428 return true;
429 }
430 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
431 resume_data->valid = true;
432
433 return true;
434 }
435
436 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
437 {
438 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
439 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
440 struct ieee80211_vif *vif;
441 u32 base;
442 int ret;
443 enum iwl_d3_status d3_status;
444 struct error_table_start {
445 /* cf. struct iwl_error_event_table */
446 u32 valid;
447 u32 error_id;
448 } err_info;
449 struct iwl_notification_wait status_wait;
450 static const u16 status_cmd[] = {
451 REPLY_WOWLAN_GET_STATUS,
452 };
453 struct iwlagn_wowlan_status status_data = {};
454 struct iwl_resume_data resume_data = {
455 .priv = priv,
456 .cmd = &status_data,
457 .valid = false,
458 };
459 struct cfg80211_wowlan_wakeup wakeup = {
460 .pattern_idx = -1,
461 };
462 #ifdef CONFIG_IWLWIFI_DEBUGFS
463 const struct fw_img *img;
464 #endif
465
466 IWL_DEBUG_MAC80211(priv, "enter\n");
467 mutex_lock(&priv->mutex);
468
469 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
470 vif = ctx->vif;
471
472 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
473 if (ret)
474 goto out_unlock;
475
476 if (d3_status != IWL_D3_STATUS_ALIVE) {
477 IWL_INFO(priv, "Device was reset during suspend\n");
478 goto out_unlock;
479 }
480
481 /* uCode is no longer operating by itself */
482 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
483 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
484
485 base = priv->device_pointers.error_event_table;
486 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
487 IWL_WARN(priv, "Invalid error table during resume!\n");
488 goto out_unlock;
489 }
490
491 iwl_trans_read_mem_bytes(priv->trans, base,
492 &err_info, sizeof(err_info));
493
494 if (err_info.valid) {
495 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
496 err_info.valid, err_info.error_id);
497 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
498 wakeup.rfkill_release = true;
499 ieee80211_report_wowlan_wakeup(vif, &wakeup,
500 GFP_KERNEL);
501 }
502 goto out_unlock;
503 }
504
505 #ifdef CONFIG_IWLWIFI_DEBUGFS
506 img = &priv->fw->img[IWL_UCODE_WOWLAN];
507 if (!priv->wowlan_sram)
508 priv->wowlan_sram =
509 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
510 GFP_KERNEL);
511
512 if (priv->wowlan_sram)
513 iwl_trans_read_mem(priv->trans, 0x800000,
514 priv->wowlan_sram,
515 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
516 #endif
517
518 /*
519 * This is very strange. The GET_STATUS command is sent but the device
520 * doesn't reply properly, it seems it doesn't close the RBD so one is
521 * always left open ... As a result, we need to send another command
522 * and have to reset the driver afterwards. As we need to switch to
523 * runtime firmware again that'll happen.
524 */
525
526 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
527 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
528 &resume_data);
529
530 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
531 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
532 /* an RBD is left open in the firmware now! */
533
534 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
535 if (ret)
536 goto out_unlock;
537
538 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
539 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
540 struct cfg80211_wowlan_wakeup *wakeup_report;
541
542 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
543
544 if (reasons) {
545 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
546 wakeup.magic_pkt = true;
547 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
548 wakeup.pattern_idx = status_data.pattern_number;
549 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
550 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
551 wakeup.disconnect = true;
552 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
553 wakeup.gtk_rekey_failure = true;
554 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
555 wakeup.eap_identity_req = true;
556 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
557 wakeup.four_way_handshake = true;
558 wakeup_report = &wakeup;
559 } else {
560 wakeup_report = NULL;
561 }
562
563 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
564 }
565
566 priv->wowlan = false;
567
568 iwlagn_prepare_restart(priv);
569
570 memset((void *)&ctx->active, 0, sizeof(ctx->active));
571 iwl_connection_init_rx_config(priv, ctx);
572 iwlagn_set_rxon_chain(priv, ctx);
573
574 out_unlock:
575 mutex_unlock(&priv->mutex);
576 IWL_DEBUG_MAC80211(priv, "leave\n");
577
578 ieee80211_resume_disconnect(vif);
579
580 return 1;
581 }
582
583 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
584 {
585 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
586
587 device_set_wakeup_enable(priv->trans->dev, enabled);
588 }
589 #endif
590
591 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
592 struct ieee80211_tx_control *control,
593 struct sk_buff *skb)
594 {
595 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
596
597 if (iwlagn_tx_skb(priv, control->sta, skb))
598 ieee80211_free_txskb(hw, skb);
599 }
600
601 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
602 struct ieee80211_vif *vif,
603 struct ieee80211_key_conf *keyconf,
604 struct ieee80211_sta *sta,
605 u32 iv32, u16 *phase1key)
606 {
607 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
608
609 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
610 }
611
612 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
613 struct ieee80211_vif *vif,
614 struct ieee80211_sta *sta,
615 struct ieee80211_key_conf *key)
616 {
617 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
618 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
619 struct iwl_rxon_context *ctx = vif_priv->ctx;
620 int ret;
621 bool is_default_wep_key = false;
622
623 IWL_DEBUG_MAC80211(priv, "enter\n");
624
625 if (iwlwifi_mod_params.sw_crypto) {
626 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
627 return -EOPNOTSUPP;
628 }
629
630 switch (key->cipher) {
631 case WLAN_CIPHER_SUITE_TKIP:
632 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
633 /* fall through */
634 case WLAN_CIPHER_SUITE_CCMP:
635 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
636 break;
637 default:
638 break;
639 }
640
641 /*
642 * We could program these keys into the hardware as well, but we
643 * don't expect much multicast traffic in IBSS and having keys
644 * for more stations is probably more useful.
645 *
646 * Mark key TX-only and return 0.
647 */
648 if (vif->type == NL80211_IFTYPE_ADHOC &&
649 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
650 key->hw_key_idx = WEP_INVALID_OFFSET;
651 return 0;
652 }
653
654 /* If they key was TX-only, accept deletion */
655 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
656 return 0;
657
658 mutex_lock(&priv->mutex);
659 iwl_scan_cancel_timeout(priv, 100);
660
661 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
662
663 /*
664 * If we are getting WEP group key and we didn't receive any key mapping
665 * so far, we are in legacy wep mode (group key only), otherwise we are
666 * in 1X mode.
667 * In legacy wep mode, we use another host command to the uCode.
668 */
669 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
670 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
671 if (cmd == SET_KEY)
672 is_default_wep_key = !ctx->key_mapping_keys;
673 else
674 is_default_wep_key =
675 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
676 }
677
678
679 switch (cmd) {
680 case SET_KEY:
681 if (is_default_wep_key) {
682 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
683 break;
684 }
685 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
686 if (ret) {
687 /*
688 * can't add key for RX, but we don't need it
689 * in the device for TX so still return 0
690 */
691 ret = 0;
692 key->hw_key_idx = WEP_INVALID_OFFSET;
693 }
694
695 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
696 break;
697 case DISABLE_KEY:
698 if (is_default_wep_key)
699 ret = iwl_remove_default_wep_key(priv, ctx, key);
700 else
701 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
702
703 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
704 break;
705 default:
706 ret = -EINVAL;
707 }
708
709 mutex_unlock(&priv->mutex);
710 IWL_DEBUG_MAC80211(priv, "leave\n");
711
712 return ret;
713 }
714
715 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
716 {
717 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
718 return false;
719 return true;
720 }
721
722 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
723 {
724 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
725 return false;
726 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
727 return true;
728
729 /* disabled by default */
730 return false;
731 }
732
733 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
734 struct ieee80211_vif *vif,
735 struct ieee80211_ampdu_params *params)
736 {
737 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
738 int ret = -EINVAL;
739 struct ieee80211_sta *sta = params->sta;
740 enum ieee80211_ampdu_mlme_action action = params->action;
741 u16 tid = params->tid;
742 u16 *ssn = &params->ssn;
743 u8 buf_size = params->buf_size;
744 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
745
746 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
747 sta->addr, tid);
748
749 if (!(priv->nvm_data->sku_cap_11n_enable))
750 return -EACCES;
751
752 IWL_DEBUG_MAC80211(priv, "enter\n");
753 mutex_lock(&priv->mutex);
754
755 switch (action) {
756 case IEEE80211_AMPDU_RX_START:
757 if (!iwl_enable_rx_ampdu(priv->cfg))
758 break;
759 IWL_DEBUG_HT(priv, "start Rx\n");
760 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
761 break;
762 case IEEE80211_AMPDU_RX_STOP:
763 IWL_DEBUG_HT(priv, "stop Rx\n");
764 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
765 break;
766 case IEEE80211_AMPDU_TX_START:
767 if (!priv->trans->ops->txq_enable)
768 break;
769 if (!iwl_enable_tx_ampdu(priv->cfg))
770 break;
771 IWL_DEBUG_HT(priv, "start Tx\n");
772 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
773 break;
774 case IEEE80211_AMPDU_TX_STOP_FLUSH:
775 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
776 IWL_DEBUG_HT(priv, "Flush Tx\n");
777 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
778 break;
779 case IEEE80211_AMPDU_TX_STOP_CONT:
780 IWL_DEBUG_HT(priv, "stop Tx\n");
781 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
782 if ((ret == 0) && (priv->agg_tids_count > 0)) {
783 priv->agg_tids_count--;
784 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
785 priv->agg_tids_count);
786 }
787 if (!priv->agg_tids_count &&
788 priv->hw_params.use_rts_for_aggregation) {
789 /*
790 * switch off RTS/CTS if it was previously enabled
791 */
792 sta_priv->lq_sta.lq.general_params.flags &=
793 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
794 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
795 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
796 }
797 break;
798 case IEEE80211_AMPDU_TX_OPERATIONAL:
799 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
800 break;
801 }
802 mutex_unlock(&priv->mutex);
803 IWL_DEBUG_MAC80211(priv, "leave\n");
804 return ret;
805 }
806
807 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
808 struct ieee80211_vif *vif,
809 struct ieee80211_sta *sta)
810 {
811 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
812 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
813 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
814 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
815 int ret;
816 u8 sta_id;
817
818 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
819 sta->addr);
820 sta_priv->sta_id = IWL_INVALID_STATION;
821
822 atomic_set(&sta_priv->pending_frames, 0);
823 if (vif->type == NL80211_IFTYPE_AP)
824 sta_priv->client = true;
825
826 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
827 is_ap, sta, &sta_id);
828 if (ret) {
829 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
830 sta->addr, ret);
831 /* Should we return success if return code is EEXIST ? */
832 return ret;
833 }
834
835 sta_priv->sta_id = sta_id;
836
837 return 0;
838 }
839
840 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
841 struct ieee80211_vif *vif,
842 struct ieee80211_sta *sta)
843 {
844 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
845 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
846 int ret;
847
848 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
849
850 if (vif->type == NL80211_IFTYPE_STATION) {
851 /*
852 * Station will be removed from device when the RXON
853 * is set to unassociated -- just deactivate it here
854 * to avoid re-programming it.
855 */
856 ret = 0;
857 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
858 } else {
859 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
860 if (ret)
861 IWL_DEBUG_QUIET_RFKILL(priv,
862 "Error removing station %pM\n", sta->addr);
863 }
864 return ret;
865 }
866
867 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
868 struct ieee80211_vif *vif,
869 struct ieee80211_sta *sta,
870 enum ieee80211_sta_state old_state,
871 enum ieee80211_sta_state new_state)
872 {
873 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
874 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
875 enum {
876 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
877 } op = NONE;
878 int ret;
879
880 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
881 sta->addr, old_state, new_state);
882
883 mutex_lock(&priv->mutex);
884 if (vif->type == NL80211_IFTYPE_STATION) {
885 if (old_state == IEEE80211_STA_NOTEXIST &&
886 new_state == IEEE80211_STA_NONE)
887 op = ADD;
888 else if (old_state == IEEE80211_STA_NONE &&
889 new_state == IEEE80211_STA_NOTEXIST)
890 op = REMOVE;
891 else if (old_state == IEEE80211_STA_AUTH &&
892 new_state == IEEE80211_STA_ASSOC)
893 op = HT_RATE_INIT;
894 } else {
895 if (old_state == IEEE80211_STA_AUTH &&
896 new_state == IEEE80211_STA_ASSOC)
897 op = ADD_RATE_INIT;
898 else if (old_state == IEEE80211_STA_ASSOC &&
899 new_state == IEEE80211_STA_AUTH)
900 op = REMOVE;
901 }
902
903 switch (op) {
904 case ADD:
905 ret = iwlagn_mac_sta_add(hw, vif, sta);
906 if (ret)
907 break;
908 /*
909 * Clear the in-progress flag, the AP station entry was added
910 * but we'll initialize LQ only when we've associated (which
911 * would also clear the in-progress flag). This is necessary
912 * in case we never initialize LQ because association fails.
913 */
914 spin_lock_bh(&priv->sta_lock);
915 priv->stations[iwl_sta_id(sta)].used &=
916 ~IWL_STA_UCODE_INPROGRESS;
917 spin_unlock_bh(&priv->sta_lock);
918 break;
919 case REMOVE:
920 ret = iwlagn_mac_sta_remove(hw, vif, sta);
921 break;
922 case ADD_RATE_INIT:
923 ret = iwlagn_mac_sta_add(hw, vif, sta);
924 if (ret)
925 break;
926 /* Initialize rate scaling */
927 IWL_DEBUG_INFO(priv,
928 "Initializing rate scaling for station %pM\n",
929 sta->addr);
930 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
931 ret = 0;
932 break;
933 case HT_RATE_INIT:
934 /* Initialize rate scaling */
935 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
936 if (ret)
937 break;
938 IWL_DEBUG_INFO(priv,
939 "Initializing rate scaling for station %pM\n",
940 sta->addr);
941 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
942 ret = 0;
943 break;
944 default:
945 ret = 0;
946 break;
947 }
948
949 /*
950 * mac80211 might WARN if we fail, but due the way we
951 * (badly) handle hard rfkill, we might fail here
952 */
953 if (iwl_is_rfkill(priv))
954 ret = 0;
955
956 mutex_unlock(&priv->mutex);
957 IWL_DEBUG_MAC80211(priv, "leave\n");
958
959 return ret;
960 }
961
962 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
963 struct ieee80211_vif *vif,
964 struct ieee80211_channel_switch *ch_switch)
965 {
966 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
967 struct ieee80211_conf *conf = &hw->conf;
968 struct ieee80211_channel *channel = ch_switch->chandef.chan;
969 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
970 /*
971 * MULTI-FIXME
972 * When we add support for multiple interfaces, we need to
973 * revisit this. The channel switch command in the device
974 * only affects the BSS context, but what does that really
975 * mean? And what if we get a CSA on the second interface?
976 * This needs a lot of work.
977 */
978 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
979 u16 ch;
980
981 IWL_DEBUG_MAC80211(priv, "enter\n");
982
983 mutex_lock(&priv->mutex);
984
985 if (iwl_is_rfkill(priv))
986 goto out;
987
988 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
989 test_bit(STATUS_SCANNING, &priv->status) ||
990 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
991 goto out;
992
993 if (!iwl_is_associated_ctx(ctx))
994 goto out;
995
996 if (!priv->lib->set_channel_switch)
997 goto out;
998
999 ch = channel->hw_value;
1000 if (le16_to_cpu(ctx->active.channel) == ch)
1001 goto out;
1002
1003 priv->current_ht_config.smps = conf->smps_mode;
1004
1005 /* Configure HT40 channels */
1006 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
1007 case NL80211_CHAN_NO_HT:
1008 case NL80211_CHAN_HT20:
1009 ctx->ht.is_40mhz = false;
1010 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1011 break;
1012 case NL80211_CHAN_HT40MINUS:
1013 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1014 ctx->ht.is_40mhz = true;
1015 break;
1016 case NL80211_CHAN_HT40PLUS:
1017 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1018 ctx->ht.is_40mhz = true;
1019 break;
1020 }
1021
1022 if ((le16_to_cpu(ctx->staging.channel) != ch))
1023 ctx->staging.flags = 0;
1024
1025 iwl_set_rxon_channel(priv, channel, ctx);
1026 iwl_set_rxon_ht(priv, ht_conf);
1027 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1028
1029 /*
1030 * at this point, staging_rxon has the
1031 * configuration for channel switch
1032 */
1033 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1034 priv->switch_channel = cpu_to_le16(ch);
1035 if (priv->lib->set_channel_switch(priv, ch_switch)) {
1036 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1037 priv->switch_channel = 0;
1038 ieee80211_chswitch_done(ctx->vif, false);
1039 }
1040
1041 out:
1042 mutex_unlock(&priv->mutex);
1043 IWL_DEBUG_MAC80211(priv, "leave\n");
1044 }
1045
1046 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1047 {
1048 /*
1049 * MULTI-FIXME
1050 * See iwlagn_mac_channel_switch.
1051 */
1052 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1053
1054 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1055 return;
1056
1057 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1058 return;
1059
1060 if (ctx->vif)
1061 ieee80211_chswitch_done(ctx->vif, is_success);
1062 }
1063
1064 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1065 unsigned int changed_flags,
1066 unsigned int *total_flags,
1067 u64 multicast)
1068 {
1069 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1070 __le32 filter_or = 0, filter_nand = 0;
1071 struct iwl_rxon_context *ctx;
1072
1073 #define CHK(test, flag) do { \
1074 if (*total_flags & (test)) \
1075 filter_or |= (flag); \
1076 else \
1077 filter_nand |= (flag); \
1078 } while (0)
1079
1080 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1081 changed_flags, *total_flags);
1082
1083 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1084 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1085 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1086 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1087
1088 #undef CHK
1089
1090 mutex_lock(&priv->mutex);
1091
1092 for_each_context(priv, ctx) {
1093 ctx->staging.filter_flags &= ~filter_nand;
1094 ctx->staging.filter_flags |= filter_or;
1095
1096 /*
1097 * Not committing directly because hardware can perform a scan,
1098 * but we'll eventually commit the filter flags change anyway.
1099 */
1100 }
1101
1102 mutex_unlock(&priv->mutex);
1103
1104 /*
1105 * Receiving all multicast frames is always enabled by the
1106 * default flags setup in iwl_connection_init_rx_config()
1107 * since we currently do not support programming multicast
1108 * filters into the device.
1109 */
1110 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1111 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1112 }
1113
1114 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1115 u32 queues, bool drop)
1116 {
1117 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1118 u32 scd_queues;
1119
1120 mutex_lock(&priv->mutex);
1121 IWL_DEBUG_MAC80211(priv, "enter\n");
1122
1123 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1124 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1125 goto done;
1126 }
1127 if (iwl_is_rfkill(priv)) {
1128 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1129 goto done;
1130 }
1131
1132 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
1133 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1134 BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1135
1136 if (drop) {
1137 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1138 scd_queues);
1139 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1140 IWL_ERR(priv, "flush request fail\n");
1141 goto done;
1142 }
1143 }
1144
1145 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1146 iwl_trans_wait_tx_queue_empty(priv->trans, scd_queues);
1147 done:
1148 mutex_unlock(&priv->mutex);
1149 IWL_DEBUG_MAC80211(priv, "leave\n");
1150 }
1151
1152 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1153 struct ieee80211_vif *vif,
1154 const struct ieee80211_event *event)
1155 {
1156 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1157
1158 if (event->type != RSSI_EVENT)
1159 return;
1160
1161 IWL_DEBUG_MAC80211(priv, "enter\n");
1162
1163 if (priv->lib->bt_params &&
1164 priv->lib->bt_params->advanced_bt_coexist) {
1165 if (event->u.rssi.data == RSSI_EVENT_LOW)
1166 priv->bt_enable_pspoll = true;
1167 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1168 priv->bt_enable_pspoll = false;
1169
1170 queue_work(priv->workqueue, &priv->bt_runtime_config);
1171 } else {
1172 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1173 "ignoring RSSI callback\n");
1174 }
1175
1176 IWL_DEBUG_MAC80211(priv, "leave\n");
1177 }
1178
1179 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1180 struct ieee80211_sta *sta, bool set)
1181 {
1182 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1183
1184 queue_work(priv->workqueue, &priv->beacon_update);
1185
1186 return 0;
1187 }
1188
1189 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1190 struct ieee80211_vif *vif, u16 queue,
1191 const struct ieee80211_tx_queue_params *params)
1192 {
1193 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1194 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1195 struct iwl_rxon_context *ctx = vif_priv->ctx;
1196 int q;
1197
1198 if (WARN_ON(!ctx))
1199 return -EINVAL;
1200
1201 IWL_DEBUG_MAC80211(priv, "enter\n");
1202
1203 if (!iwl_is_ready_rf(priv)) {
1204 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1205 return -EIO;
1206 }
1207
1208 if (queue >= AC_NUM) {
1209 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1210 return 0;
1211 }
1212
1213 q = AC_NUM - 1 - queue;
1214
1215 mutex_lock(&priv->mutex);
1216
1217 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1218 cpu_to_le16(params->cw_min);
1219 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1220 cpu_to_le16(params->cw_max);
1221 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1222 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1223 cpu_to_le16((params->txop * 32));
1224
1225 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1226
1227 mutex_unlock(&priv->mutex);
1228
1229 IWL_DEBUG_MAC80211(priv, "leave\n");
1230 return 0;
1231 }
1232
1233 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1234 {
1235 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1236
1237 return priv->ibss_manager == IWL_IBSS_MANAGER;
1238 }
1239
1240 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1241 {
1242 iwl_connection_init_rx_config(priv, ctx);
1243
1244 iwlagn_set_rxon_chain(priv, ctx);
1245
1246 return iwlagn_commit_rxon(priv, ctx);
1247 }
1248
1249 static int iwl_setup_interface(struct iwl_priv *priv,
1250 struct iwl_rxon_context *ctx)
1251 {
1252 struct ieee80211_vif *vif = ctx->vif;
1253 int err, ac;
1254
1255 lockdep_assert_held(&priv->mutex);
1256
1257 /*
1258 * This variable will be correct only when there's just
1259 * a single context, but all code using it is for hardware
1260 * that supports only one context.
1261 */
1262 priv->iw_mode = vif->type;
1263
1264 ctx->is_active = true;
1265
1266 err = iwl_set_mode(priv, ctx);
1267 if (err) {
1268 if (!ctx->always_active)
1269 ctx->is_active = false;
1270 return err;
1271 }
1272
1273 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1274 vif->type == NL80211_IFTYPE_ADHOC) {
1275 /*
1276 * pretend to have high BT traffic as long as we
1277 * are operating in IBSS mode, as this will cause
1278 * the rate scaling etc. to behave as intended.
1279 */
1280 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1281 }
1282
1283 /* set up queue mappings */
1284 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1285 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1286
1287 if (vif->type == NL80211_IFTYPE_AP)
1288 vif->cab_queue = ctx->mcast_queue;
1289 else
1290 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1291
1292 return 0;
1293 }
1294
1295 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1296 struct ieee80211_vif *vif)
1297 {
1298 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1299 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1300 struct iwl_rxon_context *tmp, *ctx = NULL;
1301 int err;
1302 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1303 bool reset = false;
1304
1305 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1306 viftype, vif->addr);
1307
1308 mutex_lock(&priv->mutex);
1309
1310 if (!iwl_is_ready_rf(priv)) {
1311 IWL_WARN(priv, "Try to add interface when device not ready\n");
1312 err = -EINVAL;
1313 goto out;
1314 }
1315
1316 for_each_context(priv, tmp) {
1317 u32 possible_modes =
1318 tmp->interface_modes | tmp->exclusive_interface_modes;
1319
1320 if (tmp->vif) {
1321 /* On reset we need to add the same interface again */
1322 if (tmp->vif == vif) {
1323 reset = true;
1324 ctx = tmp;
1325 break;
1326 }
1327
1328 /* check if this busy context is exclusive */
1329 if (tmp->exclusive_interface_modes &
1330 BIT(tmp->vif->type)) {
1331 err = -EINVAL;
1332 goto out;
1333 }
1334 continue;
1335 }
1336
1337 if (!(possible_modes & BIT(viftype)))
1338 continue;
1339
1340 /* have maybe usable context w/o interface */
1341 ctx = tmp;
1342 break;
1343 }
1344
1345 if (!ctx) {
1346 err = -EOPNOTSUPP;
1347 goto out;
1348 }
1349
1350 vif_priv->ctx = ctx;
1351 ctx->vif = vif;
1352
1353 /*
1354 * In SNIFFER device type, the firmware reports the FCS to
1355 * the host, rather than snipping it off. Unfortunately,
1356 * mac80211 doesn't (yet) provide a per-packet flag for
1357 * this, so that we have to set the hardware flag based
1358 * on the interfaces added. As the monitor interface can
1359 * only be present by itself, and will be removed before
1360 * other interfaces are added, this is safe.
1361 */
1362 if (vif->type == NL80211_IFTYPE_MONITOR)
1363 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1364 else
1365 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1366
1367 err = iwl_setup_interface(priv, ctx);
1368 if (!err || reset)
1369 goto out;
1370
1371 ctx->vif = NULL;
1372 priv->iw_mode = NL80211_IFTYPE_STATION;
1373 out:
1374 mutex_unlock(&priv->mutex);
1375
1376 IWL_DEBUG_MAC80211(priv, "leave\n");
1377 return err;
1378 }
1379
1380 static void iwl_teardown_interface(struct iwl_priv *priv,
1381 struct ieee80211_vif *vif,
1382 bool mode_change)
1383 {
1384 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1385
1386 lockdep_assert_held(&priv->mutex);
1387
1388 if (priv->scan_vif == vif) {
1389 iwl_scan_cancel_timeout(priv, 200);
1390 iwl_force_scan_end(priv);
1391 }
1392
1393 if (!mode_change) {
1394 iwl_set_mode(priv, ctx);
1395 if (!ctx->always_active)
1396 ctx->is_active = false;
1397 }
1398
1399 /*
1400 * When removing the IBSS interface, overwrite the
1401 * BT traffic load with the stored one from the last
1402 * notification, if any. If this is a device that
1403 * doesn't implement this, this has no effect since
1404 * both values are the same and zero.
1405 */
1406 if (vif->type == NL80211_IFTYPE_ADHOC)
1407 priv->bt_traffic_load = priv->last_bt_traffic_load;
1408 }
1409
1410 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1411 struct ieee80211_vif *vif)
1412 {
1413 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1414 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1415
1416 IWL_DEBUG_MAC80211(priv, "enter\n");
1417
1418 mutex_lock(&priv->mutex);
1419
1420 WARN_ON(ctx->vif != vif);
1421 ctx->vif = NULL;
1422
1423 iwl_teardown_interface(priv, vif, false);
1424
1425 mutex_unlock(&priv->mutex);
1426
1427 IWL_DEBUG_MAC80211(priv, "leave\n");
1428
1429 }
1430
1431 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1432 struct ieee80211_vif *vif,
1433 enum nl80211_iftype newtype, bool newp2p)
1434 {
1435 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1436 struct iwl_rxon_context *ctx, *tmp;
1437 enum nl80211_iftype newviftype = newtype;
1438 u32 interface_modes;
1439 int err;
1440
1441 IWL_DEBUG_MAC80211(priv, "enter\n");
1442
1443 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1444
1445 mutex_lock(&priv->mutex);
1446
1447 ctx = iwl_rxon_ctx_from_vif(vif);
1448
1449 /*
1450 * To simplify this code, only support changes on the
1451 * BSS context. The PAN context is usually reassigned
1452 * by creating/removing P2P interfaces anyway.
1453 */
1454 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1455 err = -EBUSY;
1456 goto out;
1457 }
1458
1459 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1460 /*
1461 * Huh? But wait ... this can maybe happen when
1462 * we're in the middle of a firmware restart!
1463 */
1464 err = -EBUSY;
1465 goto out;
1466 }
1467
1468 /* Check if the switch is supported in the same context */
1469 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1470 if (!(interface_modes & BIT(newtype))) {
1471 err = -EBUSY;
1472 goto out;
1473 }
1474
1475 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1476 for_each_context(priv, tmp) {
1477 if (ctx == tmp)
1478 continue;
1479
1480 if (!tmp->is_active)
1481 continue;
1482
1483 /*
1484 * The current mode switch would be exclusive, but
1485 * another context is active ... refuse the switch.
1486 */
1487 err = -EBUSY;
1488 goto out;
1489 }
1490 }
1491
1492 /* success */
1493 iwl_teardown_interface(priv, vif, true);
1494 vif->type = newviftype;
1495 vif->p2p = newp2p;
1496 err = iwl_setup_interface(priv, ctx);
1497 WARN_ON(err);
1498 /*
1499 * We've switched internally, but submitting to the
1500 * device may have failed for some reason. Mask this
1501 * error, because otherwise mac80211 will not switch
1502 * (and set the interface type back) and we'll be
1503 * out of sync with it.
1504 */
1505 err = 0;
1506
1507 out:
1508 mutex_unlock(&priv->mutex);
1509 IWL_DEBUG_MAC80211(priv, "leave\n");
1510
1511 return err;
1512 }
1513
1514 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1515 struct ieee80211_vif *vif,
1516 struct ieee80211_scan_request *hw_req)
1517 {
1518 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1519 struct cfg80211_scan_request *req = &hw_req->req;
1520 int ret;
1521
1522 IWL_DEBUG_MAC80211(priv, "enter\n");
1523
1524 if (req->n_channels == 0)
1525 return -EINVAL;
1526
1527 mutex_lock(&priv->mutex);
1528
1529 /*
1530 * If an internal scan is in progress, just set
1531 * up the scan_request as per above.
1532 */
1533 if (priv->scan_type != IWL_SCAN_NORMAL) {
1534 IWL_DEBUG_SCAN(priv,
1535 "SCAN request during internal scan - defer\n");
1536 priv->scan_request = req;
1537 priv->scan_vif = vif;
1538 ret = 0;
1539 } else {
1540 priv->scan_request = req;
1541 priv->scan_vif = vif;
1542 /*
1543 * mac80211 will only ask for one band at a time
1544 * so using channels[0] here is ok
1545 */
1546 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1547 req->channels[0]->band);
1548 if (ret) {
1549 priv->scan_request = NULL;
1550 priv->scan_vif = NULL;
1551 }
1552 }
1553
1554 IWL_DEBUG_MAC80211(priv, "leave\n");
1555
1556 mutex_unlock(&priv->mutex);
1557
1558 return ret;
1559 }
1560
1561 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1562 {
1563 struct iwl_addsta_cmd cmd = {
1564 .mode = STA_CONTROL_MODIFY_MSK,
1565 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1566 .sta.sta_id = sta_id,
1567 };
1568
1569 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1570 }
1571
1572 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1573 struct ieee80211_vif *vif,
1574 enum sta_notify_cmd cmd,
1575 struct ieee80211_sta *sta)
1576 {
1577 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1578 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1579 int sta_id;
1580
1581 IWL_DEBUG_MAC80211(priv, "enter\n");
1582
1583 switch (cmd) {
1584 case STA_NOTIFY_SLEEP:
1585 WARN_ON(!sta_priv->client);
1586 sta_priv->asleep = true;
1587 if (atomic_read(&sta_priv->pending_frames) > 0)
1588 ieee80211_sta_block_awake(hw, sta, true);
1589 break;
1590 case STA_NOTIFY_AWAKE:
1591 WARN_ON(!sta_priv->client);
1592 if (!sta_priv->asleep)
1593 break;
1594 sta_priv->asleep = false;
1595 sta_id = iwl_sta_id(sta);
1596 if (sta_id != IWL_INVALID_STATION)
1597 iwl_sta_modify_ps_wake(priv, sta_id);
1598 break;
1599 default:
1600 break;
1601 }
1602 IWL_DEBUG_MAC80211(priv, "leave\n");
1603 }
1604
1605 const struct ieee80211_ops iwlagn_hw_ops = {
1606 .tx = iwlagn_mac_tx,
1607 .start = iwlagn_mac_start,
1608 .stop = iwlagn_mac_stop,
1609 #ifdef CONFIG_PM_SLEEP
1610 .suspend = iwlagn_mac_suspend,
1611 .resume = iwlagn_mac_resume,
1612 .set_wakeup = iwlagn_mac_set_wakeup,
1613 #endif
1614 .add_interface = iwlagn_mac_add_interface,
1615 .remove_interface = iwlagn_mac_remove_interface,
1616 .change_interface = iwlagn_mac_change_interface,
1617 .config = iwlagn_mac_config,
1618 .configure_filter = iwlagn_configure_filter,
1619 .set_key = iwlagn_mac_set_key,
1620 .update_tkip_key = iwlagn_mac_update_tkip_key,
1621 .set_rekey_data = iwlagn_mac_set_rekey_data,
1622 .conf_tx = iwlagn_mac_conf_tx,
1623 .bss_info_changed = iwlagn_bss_info_changed,
1624 .ampdu_action = iwlagn_mac_ampdu_action,
1625 .hw_scan = iwlagn_mac_hw_scan,
1626 .sta_notify = iwlagn_mac_sta_notify,
1627 .sta_state = iwlagn_mac_sta_state,
1628 .channel_switch = iwlagn_mac_channel_switch,
1629 .flush = iwlagn_mac_flush,
1630 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1631 .event_callback = iwlagn_mac_event_callback,
1632 .set_tim = iwlagn_mac_set_tim,
1633 };
1634
1635 /* This function both allocates and initializes hw and priv. */
1636 struct ieee80211_hw *iwl_alloc_all(void)
1637 {
1638 struct iwl_priv *priv;
1639 struct iwl_op_mode *op_mode;
1640 /* mac80211 allocates memory for this device instance, including
1641 * space for this driver's private structure */
1642 struct ieee80211_hw *hw;
1643
1644 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1645 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1646 if (!hw)
1647 goto out;
1648
1649 op_mode = hw->priv;
1650 priv = IWL_OP_MODE_GET_DVM(op_mode);
1651 priv->hw = hw;
1652
1653 out:
1654 return hw;
1655 }
Linux kernel - Deliverables
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