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Merge branch 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
[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);
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);
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 enum ieee80211_ampdu_mlme_action action,
736 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
737 u8 buf_size, bool amsdu)
738 {
739 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
740 int ret = -EINVAL;
741 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
742
743 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
744 sta->addr, tid);
745
746 if (!(priv->nvm_data->sku_cap_11n_enable))
747 return -EACCES;
748
749 IWL_DEBUG_MAC80211(priv, "enter\n");
750 mutex_lock(&priv->mutex);
751
752 switch (action) {
753 case IEEE80211_AMPDU_RX_START:
754 if (!iwl_enable_rx_ampdu(priv->cfg))
755 break;
756 IWL_DEBUG_HT(priv, "start Rx\n");
757 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
758 break;
759 case IEEE80211_AMPDU_RX_STOP:
760 IWL_DEBUG_HT(priv, "stop Rx\n");
761 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
762 break;
763 case IEEE80211_AMPDU_TX_START:
764 if (!priv->trans->ops->txq_enable)
765 break;
766 if (!iwl_enable_tx_ampdu(priv->cfg))
767 break;
768 IWL_DEBUG_HT(priv, "start Tx\n");
769 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
770 break;
771 case IEEE80211_AMPDU_TX_STOP_FLUSH:
772 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
773 IWL_DEBUG_HT(priv, "Flush Tx\n");
774 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
775 break;
776 case IEEE80211_AMPDU_TX_STOP_CONT:
777 IWL_DEBUG_HT(priv, "stop Tx\n");
778 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
779 if ((ret == 0) && (priv->agg_tids_count > 0)) {
780 priv->agg_tids_count--;
781 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
782 priv->agg_tids_count);
783 }
784 if (!priv->agg_tids_count &&
785 priv->hw_params.use_rts_for_aggregation) {
786 /*
787 * switch off RTS/CTS if it was previously enabled
788 */
789 sta_priv->lq_sta.lq.general_params.flags &=
790 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
791 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
792 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
793 }
794 break;
795 case IEEE80211_AMPDU_TX_OPERATIONAL:
796 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
797 break;
798 }
799 mutex_unlock(&priv->mutex);
800 IWL_DEBUG_MAC80211(priv, "leave\n");
801 return ret;
802 }
803
804 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
805 struct ieee80211_vif *vif,
806 struct ieee80211_sta *sta)
807 {
808 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
809 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
810 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
811 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
812 int ret;
813 u8 sta_id;
814
815 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
816 sta->addr);
817 sta_priv->sta_id = IWL_INVALID_STATION;
818
819 atomic_set(&sta_priv->pending_frames, 0);
820 if (vif->type == NL80211_IFTYPE_AP)
821 sta_priv->client = true;
822
823 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
824 is_ap, sta, &sta_id);
825 if (ret) {
826 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
827 sta->addr, ret);
828 /* Should we return success if return code is EEXIST ? */
829 return ret;
830 }
831
832 sta_priv->sta_id = sta_id;
833
834 return 0;
835 }
836
837 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
838 struct ieee80211_vif *vif,
839 struct ieee80211_sta *sta)
840 {
841 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
842 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
843 int ret;
844
845 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
846
847 if (vif->type == NL80211_IFTYPE_STATION) {
848 /*
849 * Station will be removed from device when the RXON
850 * is set to unassociated -- just deactivate it here
851 * to avoid re-programming it.
852 */
853 ret = 0;
854 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
855 } else {
856 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
857 if (ret)
858 IWL_DEBUG_QUIET_RFKILL(priv,
859 "Error removing station %pM\n", sta->addr);
860 }
861 return ret;
862 }
863
864 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
865 struct ieee80211_vif *vif,
866 struct ieee80211_sta *sta,
867 enum ieee80211_sta_state old_state,
868 enum ieee80211_sta_state new_state)
869 {
870 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
871 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
872 enum {
873 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
874 } op = NONE;
875 int ret;
876
877 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
878 sta->addr, old_state, new_state);
879
880 mutex_lock(&priv->mutex);
881 if (vif->type == NL80211_IFTYPE_STATION) {
882 if (old_state == IEEE80211_STA_NOTEXIST &&
883 new_state == IEEE80211_STA_NONE)
884 op = ADD;
885 else if (old_state == IEEE80211_STA_NONE &&
886 new_state == IEEE80211_STA_NOTEXIST)
887 op = REMOVE;
888 else if (old_state == IEEE80211_STA_AUTH &&
889 new_state == IEEE80211_STA_ASSOC)
890 op = HT_RATE_INIT;
891 } else {
892 if (old_state == IEEE80211_STA_AUTH &&
893 new_state == IEEE80211_STA_ASSOC)
894 op = ADD_RATE_INIT;
895 else if (old_state == IEEE80211_STA_ASSOC &&
896 new_state == IEEE80211_STA_AUTH)
897 op = REMOVE;
898 }
899
900 switch (op) {
901 case ADD:
902 ret = iwlagn_mac_sta_add(hw, vif, sta);
903 if (ret)
904 break;
905 /*
906 * Clear the in-progress flag, the AP station entry was added
907 * but we'll initialize LQ only when we've associated (which
908 * would also clear the in-progress flag). This is necessary
909 * in case we never initialize LQ because association fails.
910 */
911 spin_lock_bh(&priv->sta_lock);
912 priv->stations[iwl_sta_id(sta)].used &=
913 ~IWL_STA_UCODE_INPROGRESS;
914 spin_unlock_bh(&priv->sta_lock);
915 break;
916 case REMOVE:
917 ret = iwlagn_mac_sta_remove(hw, vif, sta);
918 break;
919 case ADD_RATE_INIT:
920 ret = iwlagn_mac_sta_add(hw, vif, sta);
921 if (ret)
922 break;
923 /* Initialize rate scaling */
924 IWL_DEBUG_INFO(priv,
925 "Initializing rate scaling for station %pM\n",
926 sta->addr);
927 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
928 ret = 0;
929 break;
930 case HT_RATE_INIT:
931 /* Initialize rate scaling */
932 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
933 if (ret)
934 break;
935 IWL_DEBUG_INFO(priv,
936 "Initializing rate scaling for station %pM\n",
937 sta->addr);
938 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
939 ret = 0;
940 break;
941 default:
942 ret = 0;
943 break;
944 }
945
946 /*
947 * mac80211 might WARN if we fail, but due the way we
948 * (badly) handle hard rfkill, we might fail here
949 */
950 if (iwl_is_rfkill(priv))
951 ret = 0;
952
953 mutex_unlock(&priv->mutex);
954 IWL_DEBUG_MAC80211(priv, "leave\n");
955
956 return ret;
957 }
958
959 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
960 struct ieee80211_vif *vif,
961 struct ieee80211_channel_switch *ch_switch)
962 {
963 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
964 struct ieee80211_conf *conf = &hw->conf;
965 struct ieee80211_channel *channel = ch_switch->chandef.chan;
966 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
967 /*
968 * MULTI-FIXME
969 * When we add support for multiple interfaces, we need to
970 * revisit this. The channel switch command in the device
971 * only affects the BSS context, but what does that really
972 * mean? And what if we get a CSA on the second interface?
973 * This needs a lot of work.
974 */
975 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
976 u16 ch;
977
978 IWL_DEBUG_MAC80211(priv, "enter\n");
979
980 mutex_lock(&priv->mutex);
981
982 if (iwl_is_rfkill(priv))
983 goto out;
984
985 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
986 test_bit(STATUS_SCANNING, &priv->status) ||
987 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
988 goto out;
989
990 if (!iwl_is_associated_ctx(ctx))
991 goto out;
992
993 if (!priv->lib->set_channel_switch)
994 goto out;
995
996 ch = channel->hw_value;
997 if (le16_to_cpu(ctx->active.channel) == ch)
998 goto out;
999
1000 priv->current_ht_config.smps = conf->smps_mode;
1001
1002 /* Configure HT40 channels */
1003 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
1004 case NL80211_CHAN_NO_HT:
1005 case NL80211_CHAN_HT20:
1006 ctx->ht.is_40mhz = false;
1007 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1008 break;
1009 case NL80211_CHAN_HT40MINUS:
1010 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1011 ctx->ht.is_40mhz = true;
1012 break;
1013 case NL80211_CHAN_HT40PLUS:
1014 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1015 ctx->ht.is_40mhz = true;
1016 break;
1017 }
1018
1019 if ((le16_to_cpu(ctx->staging.channel) != ch))
1020 ctx->staging.flags = 0;
1021
1022 iwl_set_rxon_channel(priv, channel, ctx);
1023 iwl_set_rxon_ht(priv, ht_conf);
1024 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1025
1026 /*
1027 * at this point, staging_rxon has the
1028 * configuration for channel switch
1029 */
1030 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1031 priv->switch_channel = cpu_to_le16(ch);
1032 if (priv->lib->set_channel_switch(priv, ch_switch)) {
1033 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1034 priv->switch_channel = 0;
1035 ieee80211_chswitch_done(ctx->vif, false);
1036 }
1037
1038 out:
1039 mutex_unlock(&priv->mutex);
1040 IWL_DEBUG_MAC80211(priv, "leave\n");
1041 }
1042
1043 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1044 {
1045 /*
1046 * MULTI-FIXME
1047 * See iwlagn_mac_channel_switch.
1048 */
1049 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1050
1051 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1052 return;
1053
1054 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1055 return;
1056
1057 if (ctx->vif)
1058 ieee80211_chswitch_done(ctx->vif, is_success);
1059 }
1060
1061 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1062 unsigned int changed_flags,
1063 unsigned int *total_flags,
1064 u64 multicast)
1065 {
1066 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1067 __le32 filter_or = 0, filter_nand = 0;
1068 struct iwl_rxon_context *ctx;
1069
1070 #define CHK(test, flag) do { \
1071 if (*total_flags & (test)) \
1072 filter_or |= (flag); \
1073 else \
1074 filter_nand |= (flag); \
1075 } while (0)
1076
1077 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1078 changed_flags, *total_flags);
1079
1080 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1081 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1082 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1083 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1084
1085 #undef CHK
1086
1087 mutex_lock(&priv->mutex);
1088
1089 for_each_context(priv, ctx) {
1090 ctx->staging.filter_flags &= ~filter_nand;
1091 ctx->staging.filter_flags |= filter_or;
1092
1093 /*
1094 * Not committing directly because hardware can perform a scan,
1095 * but we'll eventually commit the filter flags change anyway.
1096 */
1097 }
1098
1099 mutex_unlock(&priv->mutex);
1100
1101 /*
1102 * Receiving all multicast frames is always enabled by the
1103 * default flags setup in iwl_connection_init_rx_config()
1104 * since we currently do not support programming multicast
1105 * filters into the device.
1106 */
1107 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1108 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1109 }
1110
1111 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1112 u32 queues, bool drop)
1113 {
1114 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1115 u32 scd_queues;
1116
1117 mutex_lock(&priv->mutex);
1118 IWL_DEBUG_MAC80211(priv, "enter\n");
1119
1120 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1121 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1122 goto done;
1123 }
1124 if (iwl_is_rfkill(priv)) {
1125 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1126 goto done;
1127 }
1128
1129 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
1130 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1131 BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1132
1133 if (drop) {
1134 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1135 scd_queues);
1136 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1137 IWL_ERR(priv, "flush request fail\n");
1138 goto done;
1139 }
1140 }
1141
1142 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1143 iwl_trans_wait_tx_queue_empty(priv->trans, scd_queues);
1144 done:
1145 mutex_unlock(&priv->mutex);
1146 IWL_DEBUG_MAC80211(priv, "leave\n");
1147 }
1148
1149 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1150 struct ieee80211_vif *vif,
1151 const struct ieee80211_event *event)
1152 {
1153 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1154
1155 if (event->type != RSSI_EVENT)
1156 return;
1157
1158 IWL_DEBUG_MAC80211(priv, "enter\n");
1159
1160 if (priv->lib->bt_params &&
1161 priv->lib->bt_params->advanced_bt_coexist) {
1162 if (event->u.rssi.data == RSSI_EVENT_LOW)
1163 priv->bt_enable_pspoll = true;
1164 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1165 priv->bt_enable_pspoll = false;
1166
1167 queue_work(priv->workqueue, &priv->bt_runtime_config);
1168 } else {
1169 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1170 "ignoring RSSI callback\n");
1171 }
1172
1173 IWL_DEBUG_MAC80211(priv, "leave\n");
1174 }
1175
1176 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1177 struct ieee80211_sta *sta, bool set)
1178 {
1179 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1180
1181 queue_work(priv->workqueue, &priv->beacon_update);
1182
1183 return 0;
1184 }
1185
1186 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1187 struct ieee80211_vif *vif, u16 queue,
1188 const struct ieee80211_tx_queue_params *params)
1189 {
1190 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1191 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1192 struct iwl_rxon_context *ctx = vif_priv->ctx;
1193 int q;
1194
1195 if (WARN_ON(!ctx))
1196 return -EINVAL;
1197
1198 IWL_DEBUG_MAC80211(priv, "enter\n");
1199
1200 if (!iwl_is_ready_rf(priv)) {
1201 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1202 return -EIO;
1203 }
1204
1205 if (queue >= AC_NUM) {
1206 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1207 return 0;
1208 }
1209
1210 q = AC_NUM - 1 - queue;
1211
1212 mutex_lock(&priv->mutex);
1213
1214 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1215 cpu_to_le16(params->cw_min);
1216 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1217 cpu_to_le16(params->cw_max);
1218 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1219 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1220 cpu_to_le16((params->txop * 32));
1221
1222 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1223
1224 mutex_unlock(&priv->mutex);
1225
1226 IWL_DEBUG_MAC80211(priv, "leave\n");
1227 return 0;
1228 }
1229
1230 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1231 {
1232 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1233
1234 return priv->ibss_manager == IWL_IBSS_MANAGER;
1235 }
1236
1237 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1238 {
1239 iwl_connection_init_rx_config(priv, ctx);
1240
1241 iwlagn_set_rxon_chain(priv, ctx);
1242
1243 return iwlagn_commit_rxon(priv, ctx);
1244 }
1245
1246 static int iwl_setup_interface(struct iwl_priv *priv,
1247 struct iwl_rxon_context *ctx)
1248 {
1249 struct ieee80211_vif *vif = ctx->vif;
1250 int err, ac;
1251
1252 lockdep_assert_held(&priv->mutex);
1253
1254 /*
1255 * This variable will be correct only when there's just
1256 * a single context, but all code using it is for hardware
1257 * that supports only one context.
1258 */
1259 priv->iw_mode = vif->type;
1260
1261 ctx->is_active = true;
1262
1263 err = iwl_set_mode(priv, ctx);
1264 if (err) {
1265 if (!ctx->always_active)
1266 ctx->is_active = false;
1267 return err;
1268 }
1269
1270 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1271 vif->type == NL80211_IFTYPE_ADHOC) {
1272 /*
1273 * pretend to have high BT traffic as long as we
1274 * are operating in IBSS mode, as this will cause
1275 * the rate scaling etc. to behave as intended.
1276 */
1277 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1278 }
1279
1280 /* set up queue mappings */
1281 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1282 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1283
1284 if (vif->type == NL80211_IFTYPE_AP)
1285 vif->cab_queue = ctx->mcast_queue;
1286 else
1287 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1288
1289 return 0;
1290 }
1291
1292 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1293 struct ieee80211_vif *vif)
1294 {
1295 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1296 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1297 struct iwl_rxon_context *tmp, *ctx = NULL;
1298 int err;
1299 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1300 bool reset = false;
1301
1302 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1303 viftype, vif->addr);
1304
1305 mutex_lock(&priv->mutex);
1306
1307 if (!iwl_is_ready_rf(priv)) {
1308 IWL_WARN(priv, "Try to add interface when device not ready\n");
1309 err = -EINVAL;
1310 goto out;
1311 }
1312
1313 for_each_context(priv, tmp) {
1314 u32 possible_modes =
1315 tmp->interface_modes | tmp->exclusive_interface_modes;
1316
1317 if (tmp->vif) {
1318 /* On reset we need to add the same interface again */
1319 if (tmp->vif == vif) {
1320 reset = true;
1321 ctx = tmp;
1322 break;
1323 }
1324
1325 /* check if this busy context is exclusive */
1326 if (tmp->exclusive_interface_modes &
1327 BIT(tmp->vif->type)) {
1328 err = -EINVAL;
1329 goto out;
1330 }
1331 continue;
1332 }
1333
1334 if (!(possible_modes & BIT(viftype)))
1335 continue;
1336
1337 /* have maybe usable context w/o interface */
1338 ctx = tmp;
1339 break;
1340 }
1341
1342 if (!ctx) {
1343 err = -EOPNOTSUPP;
1344 goto out;
1345 }
1346
1347 vif_priv->ctx = ctx;
1348 ctx->vif = vif;
1349
1350 /*
1351 * In SNIFFER device type, the firmware reports the FCS to
1352 * the host, rather than snipping it off. Unfortunately,
1353 * mac80211 doesn't (yet) provide a per-packet flag for
1354 * this, so that we have to set the hardware flag based
1355 * on the interfaces added. As the monitor interface can
1356 * only be present by itself, and will be removed before
1357 * other interfaces are added, this is safe.
1358 */
1359 if (vif->type == NL80211_IFTYPE_MONITOR)
1360 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1361 else
1362 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1363
1364 err = iwl_setup_interface(priv, ctx);
1365 if (!err || reset)
1366 goto out;
1367
1368 ctx->vif = NULL;
1369 priv->iw_mode = NL80211_IFTYPE_STATION;
1370 out:
1371 mutex_unlock(&priv->mutex);
1372
1373 IWL_DEBUG_MAC80211(priv, "leave\n");
1374 return err;
1375 }
1376
1377 static void iwl_teardown_interface(struct iwl_priv *priv,
1378 struct ieee80211_vif *vif,
1379 bool mode_change)
1380 {
1381 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1382
1383 lockdep_assert_held(&priv->mutex);
1384
1385 if (priv->scan_vif == vif) {
1386 iwl_scan_cancel_timeout(priv, 200);
1387 iwl_force_scan_end(priv);
1388 }
1389
1390 if (!mode_change) {
1391 iwl_set_mode(priv, ctx);
1392 if (!ctx->always_active)
1393 ctx->is_active = false;
1394 }
1395
1396 /*
1397 * When removing the IBSS interface, overwrite the
1398 * BT traffic load with the stored one from the last
1399 * notification, if any. If this is a device that
1400 * doesn't implement this, this has no effect since
1401 * both values are the same and zero.
1402 */
1403 if (vif->type == NL80211_IFTYPE_ADHOC)
1404 priv->bt_traffic_load = priv->last_bt_traffic_load;
1405 }
1406
1407 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1408 struct ieee80211_vif *vif)
1409 {
1410 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1411 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1412
1413 IWL_DEBUG_MAC80211(priv, "enter\n");
1414
1415 mutex_lock(&priv->mutex);
1416
1417 WARN_ON(ctx->vif != vif);
1418 ctx->vif = NULL;
1419
1420 iwl_teardown_interface(priv, vif, false);
1421
1422 mutex_unlock(&priv->mutex);
1423
1424 IWL_DEBUG_MAC80211(priv, "leave\n");
1425
1426 }
1427
1428 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1429 struct ieee80211_vif *vif,
1430 enum nl80211_iftype newtype, bool newp2p)
1431 {
1432 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1433 struct iwl_rxon_context *ctx, *tmp;
1434 enum nl80211_iftype newviftype = newtype;
1435 u32 interface_modes;
1436 int err;
1437
1438 IWL_DEBUG_MAC80211(priv, "enter\n");
1439
1440 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1441
1442 mutex_lock(&priv->mutex);
1443
1444 ctx = iwl_rxon_ctx_from_vif(vif);
1445
1446 /*
1447 * To simplify this code, only support changes on the
1448 * BSS context. The PAN context is usually reassigned
1449 * by creating/removing P2P interfaces anyway.
1450 */
1451 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1452 err = -EBUSY;
1453 goto out;
1454 }
1455
1456 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1457 /*
1458 * Huh? But wait ... this can maybe happen when
1459 * we're in the middle of a firmware restart!
1460 */
1461 err = -EBUSY;
1462 goto out;
1463 }
1464
1465 /* Check if the switch is supported in the same context */
1466 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1467 if (!(interface_modes & BIT(newtype))) {
1468 err = -EBUSY;
1469 goto out;
1470 }
1471
1472 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1473 for_each_context(priv, tmp) {
1474 if (ctx == tmp)
1475 continue;
1476
1477 if (!tmp->is_active)
1478 continue;
1479
1480 /*
1481 * The current mode switch would be exclusive, but
1482 * another context is active ... refuse the switch.
1483 */
1484 err = -EBUSY;
1485 goto out;
1486 }
1487 }
1488
1489 /* success */
1490 iwl_teardown_interface(priv, vif, true);
1491 vif->type = newviftype;
1492 vif->p2p = newp2p;
1493 err = iwl_setup_interface(priv, ctx);
1494 WARN_ON(err);
1495 /*
1496 * We've switched internally, but submitting to the
1497 * device may have failed for some reason. Mask this
1498 * error, because otherwise mac80211 will not switch
1499 * (and set the interface type back) and we'll be
1500 * out of sync with it.
1501 */
1502 err = 0;
1503
1504 out:
1505 mutex_unlock(&priv->mutex);
1506 IWL_DEBUG_MAC80211(priv, "leave\n");
1507
1508 return err;
1509 }
1510
1511 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1512 struct ieee80211_vif *vif,
1513 struct ieee80211_scan_request *hw_req)
1514 {
1515 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1516 struct cfg80211_scan_request *req = &hw_req->req;
1517 int ret;
1518
1519 IWL_DEBUG_MAC80211(priv, "enter\n");
1520
1521 if (req->n_channels == 0)
1522 return -EINVAL;
1523
1524 mutex_lock(&priv->mutex);
1525
1526 /*
1527 * If an internal scan is in progress, just set
1528 * up the scan_request as per above.
1529 */
1530 if (priv->scan_type != IWL_SCAN_NORMAL) {
1531 IWL_DEBUG_SCAN(priv,
1532 "SCAN request during internal scan - defer\n");
1533 priv->scan_request = req;
1534 priv->scan_vif = vif;
1535 ret = 0;
1536 } else {
1537 priv->scan_request = req;
1538 priv->scan_vif = vif;
1539 /*
1540 * mac80211 will only ask for one band at a time
1541 * so using channels[0] here is ok
1542 */
1543 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1544 req->channels[0]->band);
1545 if (ret) {
1546 priv->scan_request = NULL;
1547 priv->scan_vif = NULL;
1548 }
1549 }
1550
1551 IWL_DEBUG_MAC80211(priv, "leave\n");
1552
1553 mutex_unlock(&priv->mutex);
1554
1555 return ret;
1556 }
1557
1558 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1559 {
1560 struct iwl_addsta_cmd cmd = {
1561 .mode = STA_CONTROL_MODIFY_MSK,
1562 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1563 .sta.sta_id = sta_id,
1564 };
1565
1566 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1567 }
1568
1569 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1570 struct ieee80211_vif *vif,
1571 enum sta_notify_cmd cmd,
1572 struct ieee80211_sta *sta)
1573 {
1574 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1575 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1576 int sta_id;
1577
1578 IWL_DEBUG_MAC80211(priv, "enter\n");
1579
1580 switch (cmd) {
1581 case STA_NOTIFY_SLEEP:
1582 WARN_ON(!sta_priv->client);
1583 sta_priv->asleep = true;
1584 if (atomic_read(&sta_priv->pending_frames) > 0)
1585 ieee80211_sta_block_awake(hw, sta, true);
1586 break;
1587 case STA_NOTIFY_AWAKE:
1588 WARN_ON(!sta_priv->client);
1589 if (!sta_priv->asleep)
1590 break;
1591 sta_priv->asleep = false;
1592 sta_id = iwl_sta_id(sta);
1593 if (sta_id != IWL_INVALID_STATION)
1594 iwl_sta_modify_ps_wake(priv, sta_id);
1595 break;
1596 default:
1597 break;
1598 }
1599 IWL_DEBUG_MAC80211(priv, "leave\n");
1600 }
1601
1602 const struct ieee80211_ops iwlagn_hw_ops = {
1603 .tx = iwlagn_mac_tx,
1604 .start = iwlagn_mac_start,
1605 .stop = iwlagn_mac_stop,
1606 #ifdef CONFIG_PM_SLEEP
1607 .suspend = iwlagn_mac_suspend,
1608 .resume = iwlagn_mac_resume,
1609 .set_wakeup = iwlagn_mac_set_wakeup,
1610 #endif
1611 .add_interface = iwlagn_mac_add_interface,
1612 .remove_interface = iwlagn_mac_remove_interface,
1613 .change_interface = iwlagn_mac_change_interface,
1614 .config = iwlagn_mac_config,
1615 .configure_filter = iwlagn_configure_filter,
1616 .set_key = iwlagn_mac_set_key,
1617 .update_tkip_key = iwlagn_mac_update_tkip_key,
1618 .set_rekey_data = iwlagn_mac_set_rekey_data,
1619 .conf_tx = iwlagn_mac_conf_tx,
1620 .bss_info_changed = iwlagn_bss_info_changed,
1621 .ampdu_action = iwlagn_mac_ampdu_action,
1622 .hw_scan = iwlagn_mac_hw_scan,
1623 .sta_notify = iwlagn_mac_sta_notify,
1624 .sta_state = iwlagn_mac_sta_state,
1625 .channel_switch = iwlagn_mac_channel_switch,
1626 .flush = iwlagn_mac_flush,
1627 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1628 .event_callback = iwlagn_mac_event_callback,
1629 .set_tim = iwlagn_mac_set_tim,
1630 };
1631
1632 /* This function both allocates and initializes hw and priv. */
1633 struct ieee80211_hw *iwl_alloc_all(void)
1634 {
1635 struct iwl_priv *priv;
1636 struct iwl_op_mode *op_mode;
1637 /* mac80211 allocates memory for this device instance, including
1638 * space for this driver's private structure */
1639 struct ieee80211_hw *hw;
1640
1641 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1642 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1643 if (!hw)
1644 goto out;
1645
1646 op_mode = hw->priv;
1647 priv = IWL_OP_MODE_GET_DVM(op_mode);
1648 priv->hw = hw;
1649
1650 out:
1651 return hw;
1652 }
Linux kernel - Deliverables
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