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mac80211: pass queue bitmap to flush operation
[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / iwlwifi / dvm / mac80211.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2013 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/dma-mapping.h>
34 #include <linux/delay.h>
35 #include <linux/sched.h>
36 #include <linux/skbuff.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/if_arp.h>
40
41 #include <net/ieee80211_radiotap.h>
42 #include <net/mac80211.h>
43
44 #include <asm/div64.h>
45
46 #include "iwl-io.h"
47 #include "iwl-trans.h"
48 #include "iwl-op-mode.h"
49 #include "iwl-modparams.h"
50
51 #include "dev.h"
52 #include "calib.h"
53 #include "agn.h"
54
55 /*****************************************************************************
56 *
57 * mac80211 entry point functions
58 *
59 *****************************************************************************/
60
61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
62 {
63 .max = 1,
64 .types = BIT(NL80211_IFTYPE_STATION),
65 },
66 {
67 .max = 1,
68 .types = BIT(NL80211_IFTYPE_AP),
69 },
70 };
71
72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
73 {
74 .max = 2,
75 .types = BIT(NL80211_IFTYPE_STATION),
76 },
77 };
78
79 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
80 {
81 .max = 1,
82 .types = BIT(NL80211_IFTYPE_STATION),
83 },
84 {
85 .max = 1,
86 .types = BIT(NL80211_IFTYPE_P2P_GO) |
87 BIT(NL80211_IFTYPE_AP),
88 },
89 };
90
91 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
92 {
93 .max = 2,
94 .types = BIT(NL80211_IFTYPE_STATION),
95 },
96 {
97 .max = 1,
98 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
99 },
100 };
101
102 static const struct ieee80211_iface_combination
103 iwlagn_iface_combinations_dualmode[] = {
104 { .num_different_channels = 1,
105 .max_interfaces = 2,
106 .beacon_int_infra_match = true,
107 .limits = iwlagn_sta_ap_limits,
108 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
109 },
110 { .num_different_channels = 1,
111 .max_interfaces = 2,
112 .limits = iwlagn_2sta_limits,
113 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
114 },
115 };
116
117 static const struct ieee80211_iface_combination
118 iwlagn_iface_combinations_p2p[] = {
119 { .num_different_channels = 1,
120 .max_interfaces = 2,
121 .beacon_int_infra_match = true,
122 .limits = iwlagn_p2p_sta_go_limits,
123 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
124 },
125 { .num_different_channels = 1,
126 .max_interfaces = 2,
127 .limits = iwlagn_p2p_2sta_limits,
128 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
129 },
130 };
131
132 /*
133 * Not a mac80211 entry point function, but it fits in with all the
134 * other mac80211 functions grouped here.
135 */
136 int iwlagn_mac_setup_register(struct iwl_priv *priv,
137 const struct iwl_ucode_capabilities *capa)
138 {
139 int ret;
140 struct ieee80211_hw *hw = priv->hw;
141 struct iwl_rxon_context *ctx;
142
143 hw->rate_control_algorithm = "iwl-agn-rs";
144
145 /* Tell mac80211 our characteristics */
146 hw->flags = IEEE80211_HW_SIGNAL_DBM |
147 IEEE80211_HW_AMPDU_AGGREGATION |
148 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
149 IEEE80211_HW_SPECTRUM_MGMT |
150 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
151 IEEE80211_HW_QUEUE_CONTROL |
152 IEEE80211_HW_SUPPORTS_PS |
153 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
154 IEEE80211_HW_WANT_MONITOR_VIF;
155
156 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
157 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
158
159 /*
160 * Including the following line will crash some AP's. This
161 * workaround removes the stimulus which causes the crash until
162 * the AP software can be fixed.
163 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
164 */
165
166 if (priv->nvm_data->sku_cap_11n_enable)
167 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
168 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
169
170 /*
171 * Enable 11w if advertised by firmware and software crypto
172 * is not enabled (as the firmware will interpret some mgmt
173 * packets, so enabling it with software crypto isn't safe)
174 */
175 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
176 !iwlwifi_mod_params.sw_crypto)
177 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
178
179 hw->sta_data_size = sizeof(struct iwl_station_priv);
180 hw->vif_data_size = sizeof(struct iwl_vif_priv);
181
182 for_each_context(priv, ctx) {
183 hw->wiphy->interface_modes |= ctx->interface_modes;
184 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
185 }
186
187 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
188
189 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
190 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
191 hw->wiphy->n_iface_combinations =
192 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
193 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
194 hw->wiphy->iface_combinations =
195 iwlagn_iface_combinations_dualmode;
196 hw->wiphy->n_iface_combinations =
197 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
198 }
199
200 hw->wiphy->max_remain_on_channel_duration = 500;
201
202 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
203 WIPHY_FLAG_DISABLE_BEACON_HINTS |
204 WIPHY_FLAG_IBSS_RSN;
205
206 #ifdef CONFIG_PM_SLEEP
207 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
208 priv->trans->ops->d3_suspend &&
209 priv->trans->ops->d3_resume &&
210 device_can_wakeup(priv->trans->dev)) {
211 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
212 WIPHY_WOWLAN_DISCONNECT |
213 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
214 WIPHY_WOWLAN_RFKILL_RELEASE;
215 if (!iwlwifi_mod_params.sw_crypto)
216 hw->wiphy->wowlan.flags |=
217 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
218 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
219
220 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
221 hw->wiphy->wowlan.pattern_min_len =
222 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
223 hw->wiphy->wowlan.pattern_max_len =
224 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
225 }
226 #endif
227
228 if (iwlwifi_mod_params.power_save)
229 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
230 else
231 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
232
233 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
234 /* we create the 802.11 header and a max-length SSID element */
235 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
236
237 /*
238 * We don't use all queues: 4 and 9 are unused and any
239 * aggregation queue gets mapped down to the AC queue.
240 */
241 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
242
243 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
244
245 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
246 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
247 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
248 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
249 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
250 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
251
252 hw->wiphy->hw_version = priv->trans->hw_id;
253
254 iwl_leds_init(priv);
255
256 ret = ieee80211_register_hw(priv->hw);
257 if (ret) {
258 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
259 iwl_leds_exit(priv);
260 return ret;
261 }
262 priv->mac80211_registered = 1;
263
264 return 0;
265 }
266
267 void iwlagn_mac_unregister(struct iwl_priv *priv)
268 {
269 if (!priv->mac80211_registered)
270 return;
271 iwl_leds_exit(priv);
272 ieee80211_unregister_hw(priv->hw);
273 priv->mac80211_registered = 0;
274 }
275
276 static int __iwl_up(struct iwl_priv *priv)
277 {
278 struct iwl_rxon_context *ctx;
279 int ret;
280
281 lockdep_assert_held(&priv->mutex);
282
283 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
284 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
285 return -EIO;
286 }
287
288 for_each_context(priv, ctx) {
289 ret = iwlagn_alloc_bcast_station(priv, ctx);
290 if (ret) {
291 iwl_dealloc_bcast_stations(priv);
292 return ret;
293 }
294 }
295
296 ret = iwl_run_init_ucode(priv);
297 if (ret) {
298 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
299 goto error;
300 }
301
302 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
303 if (ret) {
304 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
305 goto error;
306 }
307
308 ret = iwl_alive_start(priv);
309 if (ret)
310 goto error;
311 return 0;
312
313 error:
314 set_bit(STATUS_EXIT_PENDING, &priv->status);
315 iwl_down(priv);
316 clear_bit(STATUS_EXIT_PENDING, &priv->status);
317
318 IWL_ERR(priv, "Unable to initialize device.\n");
319 return ret;
320 }
321
322 static int iwlagn_mac_start(struct ieee80211_hw *hw)
323 {
324 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
325 int ret;
326
327 IWL_DEBUG_MAC80211(priv, "enter\n");
328
329 /* we should be verifying the device is ready to be opened */
330 mutex_lock(&priv->mutex);
331 ret = __iwl_up(priv);
332 mutex_unlock(&priv->mutex);
333 if (ret)
334 return ret;
335
336 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
337
338 /* Now we should be done, and the READY bit should be set. */
339 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
340 ret = -EIO;
341
342 iwlagn_led_enable(priv);
343
344 priv->is_open = 1;
345 IWL_DEBUG_MAC80211(priv, "leave\n");
346 return 0;
347 }
348
349 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
350 {
351 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
352
353 IWL_DEBUG_MAC80211(priv, "enter\n");
354
355 if (!priv->is_open)
356 return;
357
358 priv->is_open = 0;
359
360 mutex_lock(&priv->mutex);
361 iwl_down(priv);
362 mutex_unlock(&priv->mutex);
363
364 iwl_cancel_deferred_work(priv);
365
366 flush_workqueue(priv->workqueue);
367
368 /* User space software may expect getting rfkill changes
369 * even if interface is down, trans->down will leave the RF
370 * kill interrupt enabled
371 */
372 iwl_trans_stop_hw(priv->trans, false);
373
374 IWL_DEBUG_MAC80211(priv, "leave\n");
375 }
376
377 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
378 struct ieee80211_vif *vif,
379 struct cfg80211_gtk_rekey_data *data)
380 {
381 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
382
383 if (iwlwifi_mod_params.sw_crypto)
384 return;
385
386 IWL_DEBUG_MAC80211(priv, "enter\n");
387 mutex_lock(&priv->mutex);
388
389 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
390 goto out;
391
392 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
393 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
394 priv->replay_ctr =
395 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
396 priv->have_rekey_data = true;
397
398 out:
399 mutex_unlock(&priv->mutex);
400 IWL_DEBUG_MAC80211(priv, "leave\n");
401 }
402
403 #ifdef CONFIG_PM_SLEEP
404
405 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
406 struct cfg80211_wowlan *wowlan)
407 {
408 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
409 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
410 int ret;
411
412 if (WARN_ON(!wowlan))
413 return -EINVAL;
414
415 IWL_DEBUG_MAC80211(priv, "enter\n");
416 mutex_lock(&priv->mutex);
417
418 /* Don't attempt WoWLAN when not associated, tear down instead. */
419 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
420 !iwl_is_associated_ctx(ctx)) {
421 ret = 1;
422 goto out;
423 }
424
425 ret = iwlagn_suspend(priv, wowlan);
426 if (ret)
427 goto error;
428
429 iwl_trans_d3_suspend(priv->trans);
430
431 goto out;
432
433 error:
434 priv->wowlan = false;
435 iwlagn_prepare_restart(priv);
436 ieee80211_restart_hw(priv->hw);
437 out:
438 mutex_unlock(&priv->mutex);
439 IWL_DEBUG_MAC80211(priv, "leave\n");
440
441 return ret;
442 }
443
444 struct iwl_resume_data {
445 struct iwl_priv *priv;
446 struct iwlagn_wowlan_status *cmd;
447 bool valid;
448 };
449
450 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
451 struct iwl_rx_packet *pkt, void *data)
452 {
453 struct iwl_resume_data *resume_data = data;
454 struct iwl_priv *priv = resume_data->priv;
455 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
456
457 if (len - 4 != sizeof(*resume_data->cmd)) {
458 IWL_ERR(priv, "rx wrong size data\n");
459 return true;
460 }
461 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
462 resume_data->valid = true;
463
464 return true;
465 }
466
467 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
468 {
469 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
470 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
471 struct ieee80211_vif *vif;
472 u32 base;
473 int ret;
474 enum iwl_d3_status d3_status;
475 struct error_table_start {
476 /* cf. struct iwl_error_event_table */
477 u32 valid;
478 u32 error_id;
479 } err_info;
480 struct iwl_notification_wait status_wait;
481 static const u8 status_cmd[] = {
482 REPLY_WOWLAN_GET_STATUS,
483 };
484 struct iwlagn_wowlan_status status_data = {};
485 struct iwl_resume_data resume_data = {
486 .priv = priv,
487 .cmd = &status_data,
488 .valid = false,
489 };
490 struct cfg80211_wowlan_wakeup wakeup = {
491 .pattern_idx = -1,
492 };
493 #ifdef CONFIG_IWLWIFI_DEBUGFS
494 const struct fw_img *img;
495 #endif
496
497 IWL_DEBUG_MAC80211(priv, "enter\n");
498 mutex_lock(&priv->mutex);
499
500 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
501 vif = ctx->vif;
502
503 ret = iwl_trans_d3_resume(priv->trans, &d3_status);
504 if (ret)
505 goto out_unlock;
506
507 if (d3_status != IWL_D3_STATUS_ALIVE) {
508 IWL_INFO(priv, "Device was reset during suspend\n");
509 goto out_unlock;
510 }
511
512 base = priv->device_pointers.error_event_table;
513 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
514 IWL_WARN(priv, "Invalid error table during resume!\n");
515 goto out_unlock;
516 }
517
518 iwl_trans_read_mem_bytes(priv->trans, base,
519 &err_info, sizeof(err_info));
520
521 if (err_info.valid) {
522 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
523 err_info.valid, err_info.error_id);
524 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
525 wakeup.rfkill_release = true;
526 ieee80211_report_wowlan_wakeup(vif, &wakeup,
527 GFP_KERNEL);
528 }
529 goto out_unlock;
530 }
531
532 #ifdef CONFIG_IWLWIFI_DEBUGFS
533 img = &priv->fw->img[IWL_UCODE_WOWLAN];
534 if (!priv->wowlan_sram)
535 priv->wowlan_sram =
536 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
537 GFP_KERNEL);
538
539 if (priv->wowlan_sram)
540 iwl_trans_read_mem(priv->trans, 0x800000,
541 priv->wowlan_sram,
542 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
543 #endif
544
545 /*
546 * This is very strange. The GET_STATUS command is sent but the device
547 * doesn't reply properly, it seems it doesn't close the RBD so one is
548 * always left open ... As a result, we need to send another command
549 * and have to reset the driver afterwards. As we need to switch to
550 * runtime firmware again that'll happen.
551 */
552
553 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
554 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
555 &resume_data);
556
557 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
558 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
559 /* an RBD is left open in the firmware now! */
560
561 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
562 if (ret)
563 goto out_unlock;
564
565 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
566 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
567 struct cfg80211_wowlan_wakeup *wakeup_report;
568
569 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
570
571 if (reasons) {
572 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
573 wakeup.magic_pkt = true;
574 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
575 wakeup.pattern_idx = status_data.pattern_number;
576 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
577 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
578 wakeup.disconnect = true;
579 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
580 wakeup.gtk_rekey_failure = true;
581 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
582 wakeup.eap_identity_req = true;
583 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
584 wakeup.four_way_handshake = true;
585 wakeup_report = &wakeup;
586 } else {
587 wakeup_report = NULL;
588 }
589
590 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
591 }
592
593 priv->wowlan = false;
594
595 iwlagn_prepare_restart(priv);
596
597 memset((void *)&ctx->active, 0, sizeof(ctx->active));
598 iwl_connection_init_rx_config(priv, ctx);
599 iwlagn_set_rxon_chain(priv, ctx);
600
601 out_unlock:
602 mutex_unlock(&priv->mutex);
603 IWL_DEBUG_MAC80211(priv, "leave\n");
604
605 ieee80211_resume_disconnect(vif);
606
607 return 1;
608 }
609
610 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
611 {
612 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
613
614 device_set_wakeup_enable(priv->trans->dev, enabled);
615 }
616 #endif
617
618 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
619 struct ieee80211_tx_control *control,
620 struct sk_buff *skb)
621 {
622 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
623
624 if (iwlagn_tx_skb(priv, control->sta, skb))
625 ieee80211_free_txskb(hw, skb);
626 }
627
628 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
629 struct ieee80211_vif *vif,
630 struct ieee80211_key_conf *keyconf,
631 struct ieee80211_sta *sta,
632 u32 iv32, u16 *phase1key)
633 {
634 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
635
636 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
637 }
638
639 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
640 struct ieee80211_vif *vif,
641 struct ieee80211_sta *sta,
642 struct ieee80211_key_conf *key)
643 {
644 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
645 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
646 struct iwl_rxon_context *ctx = vif_priv->ctx;
647 int ret;
648 bool is_default_wep_key = false;
649
650 IWL_DEBUG_MAC80211(priv, "enter\n");
651
652 if (iwlwifi_mod_params.sw_crypto) {
653 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
654 return -EOPNOTSUPP;
655 }
656
657 switch (key->cipher) {
658 case WLAN_CIPHER_SUITE_TKIP:
659 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
660 /* fall through */
661 case WLAN_CIPHER_SUITE_CCMP:
662 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
663 break;
664 default:
665 break;
666 }
667
668 /*
669 * We could program these keys into the hardware as well, but we
670 * don't expect much multicast traffic in IBSS and having keys
671 * for more stations is probably more useful.
672 *
673 * Mark key TX-only and return 0.
674 */
675 if (vif->type == NL80211_IFTYPE_ADHOC &&
676 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
677 key->hw_key_idx = WEP_INVALID_OFFSET;
678 return 0;
679 }
680
681 /* If they key was TX-only, accept deletion */
682 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
683 return 0;
684
685 mutex_lock(&priv->mutex);
686 iwl_scan_cancel_timeout(priv, 100);
687
688 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
689
690 /*
691 * If we are getting WEP group key and we didn't receive any key mapping
692 * so far, we are in legacy wep mode (group key only), otherwise we are
693 * in 1X mode.
694 * In legacy wep mode, we use another host command to the uCode.
695 */
696 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
697 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
698 if (cmd == SET_KEY)
699 is_default_wep_key = !ctx->key_mapping_keys;
700 else
701 is_default_wep_key =
702 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
703 }
704
705
706 switch (cmd) {
707 case SET_KEY:
708 if (is_default_wep_key) {
709 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
710 break;
711 }
712 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
713 if (ret) {
714 /*
715 * can't add key for RX, but we don't need it
716 * in the device for TX so still return 0
717 */
718 ret = 0;
719 key->hw_key_idx = WEP_INVALID_OFFSET;
720 }
721
722 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
723 break;
724 case DISABLE_KEY:
725 if (is_default_wep_key)
726 ret = iwl_remove_default_wep_key(priv, ctx, key);
727 else
728 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
729
730 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
731 break;
732 default:
733 ret = -EINVAL;
734 }
735
736 mutex_unlock(&priv->mutex);
737 IWL_DEBUG_MAC80211(priv, "leave\n");
738
739 return ret;
740 }
741
742 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
743 struct ieee80211_vif *vif,
744 enum ieee80211_ampdu_mlme_action action,
745 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
746 u8 buf_size)
747 {
748 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
749 int ret = -EINVAL;
750 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
751
752 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
753 sta->addr, tid);
754
755 if (!(priv->nvm_data->sku_cap_11n_enable))
756 return -EACCES;
757
758 IWL_DEBUG_MAC80211(priv, "enter\n");
759 mutex_lock(&priv->mutex);
760
761 switch (action) {
762 case IEEE80211_AMPDU_RX_START:
763 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
764 break;
765 IWL_DEBUG_HT(priv, "start Rx\n");
766 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
767 break;
768 case IEEE80211_AMPDU_RX_STOP:
769 IWL_DEBUG_HT(priv, "stop Rx\n");
770 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
771 break;
772 case IEEE80211_AMPDU_TX_START:
773 if (!priv->trans->ops->txq_enable)
774 break;
775 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
776 break;
777 IWL_DEBUG_HT(priv, "start Tx\n");
778 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
779 break;
780 case IEEE80211_AMPDU_TX_STOP_CONT:
781 case IEEE80211_AMPDU_TX_STOP_FLUSH:
782 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
783 IWL_DEBUG_HT(priv, "stop Tx\n");
784 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
785 if ((ret == 0) && (priv->agg_tids_count > 0)) {
786 priv->agg_tids_count--;
787 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
788 priv->agg_tids_count);
789 }
790 if (!priv->agg_tids_count &&
791 priv->hw_params.use_rts_for_aggregation) {
792 /*
793 * switch off RTS/CTS if it was previously enabled
794 */
795 sta_priv->lq_sta.lq.general_params.flags &=
796 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
797 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
798 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
799 }
800 break;
801 case IEEE80211_AMPDU_TX_OPERATIONAL:
802 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
803 break;
804 }
805 mutex_unlock(&priv->mutex);
806 IWL_DEBUG_MAC80211(priv, "leave\n");
807 return ret;
808 }
809
810 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
811 struct ieee80211_vif *vif,
812 struct ieee80211_sta *sta)
813 {
814 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
815 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
816 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
817 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
818 int ret;
819 u8 sta_id;
820
821 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
822 sta->addr);
823 sta_priv->sta_id = IWL_INVALID_STATION;
824
825 atomic_set(&sta_priv->pending_frames, 0);
826 if (vif->type == NL80211_IFTYPE_AP)
827 sta_priv->client = true;
828
829 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
830 is_ap, sta, &sta_id);
831 if (ret) {
832 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
833 sta->addr, ret);
834 /* Should we return success if return code is EEXIST ? */
835 return ret;
836 }
837
838 sta_priv->sta_id = sta_id;
839
840 return 0;
841 }
842
843 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
844 struct ieee80211_vif *vif,
845 struct ieee80211_sta *sta)
846 {
847 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
848 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
849 int ret;
850
851 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
852
853 if (vif->type == NL80211_IFTYPE_STATION) {
854 /*
855 * Station will be removed from device when the RXON
856 * is set to unassociated -- just deactivate it here
857 * to avoid re-programming it.
858 */
859 ret = 0;
860 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
861 } else {
862 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
863 if (ret)
864 IWL_DEBUG_QUIET_RFKILL(priv,
865 "Error removing station %pM\n", sta->addr);
866 }
867 return ret;
868 }
869
870 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
871 struct ieee80211_vif *vif,
872 struct ieee80211_sta *sta,
873 enum ieee80211_sta_state old_state,
874 enum ieee80211_sta_state new_state)
875 {
876 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
877 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
878 enum {
879 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
880 } op = NONE;
881 int ret;
882
883 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
884 sta->addr, old_state, new_state);
885
886 mutex_lock(&priv->mutex);
887 if (vif->type == NL80211_IFTYPE_STATION) {
888 if (old_state == IEEE80211_STA_NOTEXIST &&
889 new_state == IEEE80211_STA_NONE)
890 op = ADD;
891 else if (old_state == IEEE80211_STA_NONE &&
892 new_state == IEEE80211_STA_NOTEXIST)
893 op = REMOVE;
894 else if (old_state == IEEE80211_STA_AUTH &&
895 new_state == IEEE80211_STA_ASSOC)
896 op = HT_RATE_INIT;
897 } else {
898 if (old_state == IEEE80211_STA_AUTH &&
899 new_state == IEEE80211_STA_ASSOC)
900 op = ADD_RATE_INIT;
901 else if (old_state == IEEE80211_STA_ASSOC &&
902 new_state == IEEE80211_STA_AUTH)
903 op = REMOVE;
904 }
905
906 switch (op) {
907 case ADD:
908 ret = iwlagn_mac_sta_add(hw, vif, sta);
909 if (ret)
910 break;
911 /*
912 * Clear the in-progress flag, the AP station entry was added
913 * but we'll initialize LQ only when we've associated (which
914 * would also clear the in-progress flag). This is necessary
915 * in case we never initialize LQ because association fails.
916 */
917 spin_lock_bh(&priv->sta_lock);
918 priv->stations[iwl_sta_id(sta)].used &=
919 ~IWL_STA_UCODE_INPROGRESS;
920 spin_unlock_bh(&priv->sta_lock);
921 break;
922 case REMOVE:
923 ret = iwlagn_mac_sta_remove(hw, vif, sta);
924 break;
925 case ADD_RATE_INIT:
926 ret = iwlagn_mac_sta_add(hw, vif, sta);
927 if (ret)
928 break;
929 /* Initialize rate scaling */
930 IWL_DEBUG_INFO(priv,
931 "Initializing rate scaling for station %pM\n",
932 sta->addr);
933 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
934 ret = 0;
935 break;
936 case HT_RATE_INIT:
937 /* Initialize rate scaling */
938 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
939 if (ret)
940 break;
941 IWL_DEBUG_INFO(priv,
942 "Initializing rate scaling for station %pM\n",
943 sta->addr);
944 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
945 ret = 0;
946 break;
947 default:
948 ret = 0;
949 break;
950 }
951
952 /*
953 * mac80211 might WARN if we fail, but due the way we
954 * (badly) handle hard rfkill, we might fail here
955 */
956 if (iwl_is_rfkill(priv))
957 ret = 0;
958
959 mutex_unlock(&priv->mutex);
960 IWL_DEBUG_MAC80211(priv, "leave\n");
961
962 return ret;
963 }
964
965 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
966 struct ieee80211_channel_switch *ch_switch)
967 {
968 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
969 struct ieee80211_conf *conf = &hw->conf;
970 struct ieee80211_channel *channel = ch_switch->channel;
971 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
972 /*
973 * MULTI-FIXME
974 * When we add support for multiple interfaces, we need to
975 * revisit this. The channel switch command in the device
976 * only affects the BSS context, but what does that really
977 * mean? And what if we get a CSA on the second interface?
978 * This needs a lot of work.
979 */
980 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
981 u16 ch;
982
983 IWL_DEBUG_MAC80211(priv, "enter\n");
984
985 mutex_lock(&priv->mutex);
986
987 if (iwl_is_rfkill(priv))
988 goto out;
989
990 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
991 test_bit(STATUS_SCANNING, &priv->status) ||
992 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
993 goto out;
994
995 if (!iwl_is_associated_ctx(ctx))
996 goto out;
997
998 if (!priv->lib->set_channel_switch)
999 goto out;
1000
1001 ch = channel->hw_value;
1002 if (le16_to_cpu(ctx->active.channel) == ch)
1003 goto out;
1004
1005 priv->current_ht_config.smps = conf->smps_mode;
1006
1007 /* Configure HT40 channels */
1008 ctx->ht.enabled = conf_is_ht(conf);
1009 if (ctx->ht.enabled)
1010 iwlagn_config_ht40(conf, ctx);
1011 else
1012 ctx->ht.is_40mhz = false;
1013
1014 if ((le16_to_cpu(ctx->staging.channel) != ch))
1015 ctx->staging.flags = 0;
1016
1017 iwl_set_rxon_channel(priv, channel, ctx);
1018 iwl_set_rxon_ht(priv, ht_conf);
1019 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1020
1021 /*
1022 * at this point, staging_rxon has the
1023 * configuration for channel switch
1024 */
1025 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1026 priv->switch_channel = cpu_to_le16(ch);
1027 if (priv->lib->set_channel_switch(priv, ch_switch)) {
1028 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1029 priv->switch_channel = 0;
1030 ieee80211_chswitch_done(ctx->vif, false);
1031 }
1032
1033 out:
1034 mutex_unlock(&priv->mutex);
1035 IWL_DEBUG_MAC80211(priv, "leave\n");
1036 }
1037
1038 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1039 {
1040 /*
1041 * MULTI-FIXME
1042 * See iwlagn_mac_channel_switch.
1043 */
1044 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1045
1046 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1047 return;
1048
1049 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1050 ieee80211_chswitch_done(ctx->vif, is_success);
1051 }
1052
1053 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1054 unsigned int changed_flags,
1055 unsigned int *total_flags,
1056 u64 multicast)
1057 {
1058 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1059 __le32 filter_or = 0, filter_nand = 0;
1060 struct iwl_rxon_context *ctx;
1061
1062 #define CHK(test, flag) do { \
1063 if (*total_flags & (test)) \
1064 filter_or |= (flag); \
1065 else \
1066 filter_nand |= (flag); \
1067 } while (0)
1068
1069 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1070 changed_flags, *total_flags);
1071
1072 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1073 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1074 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1075 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1076
1077 #undef CHK
1078
1079 mutex_lock(&priv->mutex);
1080
1081 for_each_context(priv, ctx) {
1082 ctx->staging.filter_flags &= ~filter_nand;
1083 ctx->staging.filter_flags |= filter_or;
1084
1085 /*
1086 * Not committing directly because hardware can perform a scan,
1087 * but we'll eventually commit the filter flags change anyway.
1088 */
1089 }
1090
1091 mutex_unlock(&priv->mutex);
1092
1093 /*
1094 * Receiving all multicast frames is always enabled by the
1095 * default flags setup in iwl_connection_init_rx_config()
1096 * since we currently do not support programming multicast
1097 * filters into the device.
1098 */
1099 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1100 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1101 }
1102
1103 static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1104 {
1105 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1106
1107 mutex_lock(&priv->mutex);
1108 IWL_DEBUG_MAC80211(priv, "enter\n");
1109
1110 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1111 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1112 goto done;
1113 }
1114 if (iwl_is_rfkill(priv)) {
1115 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1116 goto done;
1117 }
1118
1119 /*
1120 * mac80211 will not push any more frames for transmit
1121 * until the flush is completed
1122 */
1123 if (drop) {
1124 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1125 if (iwlagn_txfifo_flush(priv)) {
1126 IWL_ERR(priv, "flush request fail\n");
1127 goto done;
1128 }
1129 }
1130 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1131 iwl_trans_wait_tx_queue_empty(priv->trans);
1132 done:
1133 mutex_unlock(&priv->mutex);
1134 IWL_DEBUG_MAC80211(priv, "leave\n");
1135 }
1136
1137 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1138 struct ieee80211_vif *vif,
1139 struct ieee80211_channel *channel,
1140 int duration,
1141 enum ieee80211_roc_type type)
1142 {
1143 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1144 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1145 int err = 0;
1146
1147 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1148 return -EOPNOTSUPP;
1149
1150 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1151 return -EOPNOTSUPP;
1152
1153 IWL_DEBUG_MAC80211(priv, "enter\n");
1154 mutex_lock(&priv->mutex);
1155
1156 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1157 /* mac80211 should not scan while ROC or ROC while scanning */
1158 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1159 err = -EBUSY;
1160 goto out;
1161 }
1162
1163 iwl_scan_cancel_timeout(priv, 100);
1164
1165 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1166 err = -EBUSY;
1167 goto out;
1168 }
1169 }
1170
1171 priv->hw_roc_channel = channel;
1172 /* convert from ms to TU */
1173 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1174 priv->hw_roc_start_notified = false;
1175 cancel_delayed_work(&priv->hw_roc_disable_work);
1176
1177 if (!ctx->is_active) {
1178 static const struct iwl_qos_info default_qos_data = {
1179 .def_qos_parm = {
1180 .ac[0] = {
1181 .cw_min = cpu_to_le16(3),
1182 .cw_max = cpu_to_le16(7),
1183 .aifsn = 2,
1184 .edca_txop = cpu_to_le16(1504),
1185 },
1186 .ac[1] = {
1187 .cw_min = cpu_to_le16(7),
1188 .cw_max = cpu_to_le16(15),
1189 .aifsn = 2,
1190 .edca_txop = cpu_to_le16(3008),
1191 },
1192 .ac[2] = {
1193 .cw_min = cpu_to_le16(15),
1194 .cw_max = cpu_to_le16(1023),
1195 .aifsn = 3,
1196 },
1197 .ac[3] = {
1198 .cw_min = cpu_to_le16(15),
1199 .cw_max = cpu_to_le16(1023),
1200 .aifsn = 7,
1201 },
1202 },
1203 };
1204
1205 ctx->is_active = true;
1206 ctx->qos_data = default_qos_data;
1207 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1208 memcpy(ctx->staging.node_addr,
1209 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1210 ETH_ALEN);
1211 memcpy(ctx->staging.bssid_addr,
1212 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1213 ETH_ALEN);
1214 err = iwlagn_commit_rxon(priv, ctx);
1215 if (err)
1216 goto out;
1217 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1218 RXON_FILTER_PROMISC_MSK |
1219 RXON_FILTER_CTL2HOST_MSK;
1220
1221 err = iwlagn_commit_rxon(priv, ctx);
1222 if (err) {
1223 iwlagn_disable_roc(priv);
1224 goto out;
1225 }
1226 priv->hw_roc_setup = true;
1227 }
1228
1229 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1230 if (err)
1231 iwlagn_disable_roc(priv);
1232
1233 out:
1234 mutex_unlock(&priv->mutex);
1235 IWL_DEBUG_MAC80211(priv, "leave\n");
1236
1237 return err;
1238 }
1239
1240 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1241 {
1242 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1243
1244 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1245 return -EOPNOTSUPP;
1246
1247 IWL_DEBUG_MAC80211(priv, "enter\n");
1248 mutex_lock(&priv->mutex);
1249 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1250 iwlagn_disable_roc(priv);
1251 mutex_unlock(&priv->mutex);
1252 IWL_DEBUG_MAC80211(priv, "leave\n");
1253
1254 return 0;
1255 }
1256
1257 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1258 struct ieee80211_vif *vif,
1259 enum ieee80211_rssi_event rssi_event)
1260 {
1261 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1262
1263 IWL_DEBUG_MAC80211(priv, "enter\n");
1264 mutex_lock(&priv->mutex);
1265
1266 if (priv->cfg->bt_params &&
1267 priv->cfg->bt_params->advanced_bt_coexist) {
1268 if (rssi_event == RSSI_EVENT_LOW)
1269 priv->bt_enable_pspoll = true;
1270 else if (rssi_event == RSSI_EVENT_HIGH)
1271 priv->bt_enable_pspoll = false;
1272
1273 iwlagn_send_advance_bt_config(priv);
1274 } else {
1275 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1276 "ignoring RSSI callback\n");
1277 }
1278
1279 mutex_unlock(&priv->mutex);
1280 IWL_DEBUG_MAC80211(priv, "leave\n");
1281 }
1282
1283 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1284 struct ieee80211_sta *sta, bool set)
1285 {
1286 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1287
1288 queue_work(priv->workqueue, &priv->beacon_update);
1289
1290 return 0;
1291 }
1292
1293 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1294 struct ieee80211_vif *vif, u16 queue,
1295 const struct ieee80211_tx_queue_params *params)
1296 {
1297 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1298 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1299 struct iwl_rxon_context *ctx = vif_priv->ctx;
1300 int q;
1301
1302 if (WARN_ON(!ctx))
1303 return -EINVAL;
1304
1305 IWL_DEBUG_MAC80211(priv, "enter\n");
1306
1307 if (!iwl_is_ready_rf(priv)) {
1308 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1309 return -EIO;
1310 }
1311
1312 if (queue >= AC_NUM) {
1313 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1314 return 0;
1315 }
1316
1317 q = AC_NUM - 1 - queue;
1318
1319 mutex_lock(&priv->mutex);
1320
1321 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1322 cpu_to_le16(params->cw_min);
1323 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1324 cpu_to_le16(params->cw_max);
1325 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1326 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1327 cpu_to_le16((params->txop * 32));
1328
1329 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1330
1331 mutex_unlock(&priv->mutex);
1332
1333 IWL_DEBUG_MAC80211(priv, "leave\n");
1334 return 0;
1335 }
1336
1337 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1338 {
1339 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1340
1341 return priv->ibss_manager == IWL_IBSS_MANAGER;
1342 }
1343
1344 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1345 {
1346 iwl_connection_init_rx_config(priv, ctx);
1347
1348 iwlagn_set_rxon_chain(priv, ctx);
1349
1350 return iwlagn_commit_rxon(priv, ctx);
1351 }
1352
1353 static int iwl_setup_interface(struct iwl_priv *priv,
1354 struct iwl_rxon_context *ctx)
1355 {
1356 struct ieee80211_vif *vif = ctx->vif;
1357 int err, ac;
1358
1359 lockdep_assert_held(&priv->mutex);
1360
1361 /*
1362 * This variable will be correct only when there's just
1363 * a single context, but all code using it is for hardware
1364 * that supports only one context.
1365 */
1366 priv->iw_mode = vif->type;
1367
1368 ctx->is_active = true;
1369
1370 err = iwl_set_mode(priv, ctx);
1371 if (err) {
1372 if (!ctx->always_active)
1373 ctx->is_active = false;
1374 return err;
1375 }
1376
1377 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1378 vif->type == NL80211_IFTYPE_ADHOC) {
1379 /*
1380 * pretend to have high BT traffic as long as we
1381 * are operating in IBSS mode, as this will cause
1382 * the rate scaling etc. to behave as intended.
1383 */
1384 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1385 }
1386
1387 /* set up queue mappings */
1388 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1389 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1390
1391 if (vif->type == NL80211_IFTYPE_AP)
1392 vif->cab_queue = ctx->mcast_queue;
1393 else
1394 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1395
1396 return 0;
1397 }
1398
1399 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1400 struct ieee80211_vif *vif)
1401 {
1402 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1403 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1404 struct iwl_rxon_context *tmp, *ctx = NULL;
1405 int err;
1406 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1407 bool reset = false;
1408
1409 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1410 viftype, vif->addr);
1411
1412 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1413
1414 mutex_lock(&priv->mutex);
1415
1416 iwlagn_disable_roc(priv);
1417
1418 if (!iwl_is_ready_rf(priv)) {
1419 IWL_WARN(priv, "Try to add interface when device not ready\n");
1420 err = -EINVAL;
1421 goto out;
1422 }
1423
1424 for_each_context(priv, tmp) {
1425 u32 possible_modes =
1426 tmp->interface_modes | tmp->exclusive_interface_modes;
1427
1428 if (tmp->vif) {
1429 /* On reset we need to add the same interface again */
1430 if (tmp->vif == vif) {
1431 reset = true;
1432 ctx = tmp;
1433 break;
1434 }
1435
1436 /* check if this busy context is exclusive */
1437 if (tmp->exclusive_interface_modes &
1438 BIT(tmp->vif->type)) {
1439 err = -EINVAL;
1440 goto out;
1441 }
1442 continue;
1443 }
1444
1445 if (!(possible_modes & BIT(viftype)))
1446 continue;
1447
1448 /* have maybe usable context w/o interface */
1449 ctx = tmp;
1450 break;
1451 }
1452
1453 if (!ctx) {
1454 err = -EOPNOTSUPP;
1455 goto out;
1456 }
1457
1458 vif_priv->ctx = ctx;
1459 ctx->vif = vif;
1460
1461 /*
1462 * In SNIFFER device type, the firmware reports the FCS to
1463 * the host, rather than snipping it off. Unfortunately,
1464 * mac80211 doesn't (yet) provide a per-packet flag for
1465 * this, so that we have to set the hardware flag based
1466 * on the interfaces added. As the monitor interface can
1467 * only be present by itself, and will be removed before
1468 * other interfaces are added, this is safe.
1469 */
1470 if (vif->type == NL80211_IFTYPE_MONITOR)
1471 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1472 else
1473 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1474
1475 err = iwl_setup_interface(priv, ctx);
1476 if (!err || reset)
1477 goto out;
1478
1479 ctx->vif = NULL;
1480 priv->iw_mode = NL80211_IFTYPE_STATION;
1481 out:
1482 mutex_unlock(&priv->mutex);
1483
1484 IWL_DEBUG_MAC80211(priv, "leave\n");
1485 return err;
1486 }
1487
1488 static void iwl_teardown_interface(struct iwl_priv *priv,
1489 struct ieee80211_vif *vif,
1490 bool mode_change)
1491 {
1492 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1493
1494 lockdep_assert_held(&priv->mutex);
1495
1496 if (priv->scan_vif == vif) {
1497 iwl_scan_cancel_timeout(priv, 200);
1498 iwl_force_scan_end(priv);
1499 }
1500
1501 if (!mode_change) {
1502 iwl_set_mode(priv, ctx);
1503 if (!ctx->always_active)
1504 ctx->is_active = false;
1505 }
1506
1507 /*
1508 * When removing the IBSS interface, overwrite the
1509 * BT traffic load with the stored one from the last
1510 * notification, if any. If this is a device that
1511 * doesn't implement this, this has no effect since
1512 * both values are the same and zero.
1513 */
1514 if (vif->type == NL80211_IFTYPE_ADHOC)
1515 priv->bt_traffic_load = priv->last_bt_traffic_load;
1516 }
1517
1518 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1519 struct ieee80211_vif *vif)
1520 {
1521 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1522 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1523
1524 IWL_DEBUG_MAC80211(priv, "enter\n");
1525
1526 mutex_lock(&priv->mutex);
1527
1528 if (WARN_ON(ctx->vif != vif)) {
1529 struct iwl_rxon_context *tmp;
1530 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1531 for_each_context(priv, tmp)
1532 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1533 tmp->ctxid, tmp, tmp->vif);
1534 }
1535 ctx->vif = NULL;
1536
1537 iwl_teardown_interface(priv, vif, false);
1538
1539 mutex_unlock(&priv->mutex);
1540
1541 IWL_DEBUG_MAC80211(priv, "leave\n");
1542
1543 }
1544
1545 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1546 struct ieee80211_vif *vif,
1547 enum nl80211_iftype newtype, bool newp2p)
1548 {
1549 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1550 struct iwl_rxon_context *ctx, *tmp;
1551 enum nl80211_iftype newviftype = newtype;
1552 u32 interface_modes;
1553 int err;
1554
1555 IWL_DEBUG_MAC80211(priv, "enter\n");
1556
1557 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1558
1559 mutex_lock(&priv->mutex);
1560
1561 ctx = iwl_rxon_ctx_from_vif(vif);
1562
1563 /*
1564 * To simplify this code, only support changes on the
1565 * BSS context. The PAN context is usually reassigned
1566 * by creating/removing P2P interfaces anyway.
1567 */
1568 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1569 err = -EBUSY;
1570 goto out;
1571 }
1572
1573 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1574 /*
1575 * Huh? But wait ... this can maybe happen when
1576 * we're in the middle of a firmware restart!
1577 */
1578 err = -EBUSY;
1579 goto out;
1580 }
1581
1582 /* Check if the switch is supported in the same context */
1583 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1584 if (!(interface_modes & BIT(newtype))) {
1585 err = -EBUSY;
1586 goto out;
1587 }
1588
1589 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1590 for_each_context(priv, tmp) {
1591 if (ctx == tmp)
1592 continue;
1593
1594 if (!tmp->is_active)
1595 continue;
1596
1597 /*
1598 * The current mode switch would be exclusive, but
1599 * another context is active ... refuse the switch.
1600 */
1601 err = -EBUSY;
1602 goto out;
1603 }
1604 }
1605
1606 /* success */
1607 iwl_teardown_interface(priv, vif, true);
1608 vif->type = newviftype;
1609 vif->p2p = newp2p;
1610 err = iwl_setup_interface(priv, ctx);
1611 WARN_ON(err);
1612 /*
1613 * We've switched internally, but submitting to the
1614 * device may have failed for some reason. Mask this
1615 * error, because otherwise mac80211 will not switch
1616 * (and set the interface type back) and we'll be
1617 * out of sync with it.
1618 */
1619 err = 0;
1620
1621 out:
1622 mutex_unlock(&priv->mutex);
1623 IWL_DEBUG_MAC80211(priv, "leave\n");
1624
1625 return err;
1626 }
1627
1628 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1629 struct ieee80211_vif *vif,
1630 struct cfg80211_scan_request *req)
1631 {
1632 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1633 int ret;
1634
1635 IWL_DEBUG_MAC80211(priv, "enter\n");
1636
1637 if (req->n_channels == 0)
1638 return -EINVAL;
1639
1640 mutex_lock(&priv->mutex);
1641
1642 /*
1643 * If an internal scan is in progress, just set
1644 * up the scan_request as per above.
1645 */
1646 if (priv->scan_type != IWL_SCAN_NORMAL) {
1647 IWL_DEBUG_SCAN(priv,
1648 "SCAN request during internal scan - defer\n");
1649 priv->scan_request = req;
1650 priv->scan_vif = vif;
1651 ret = 0;
1652 } else {
1653 priv->scan_request = req;
1654 priv->scan_vif = vif;
1655 /*
1656 * mac80211 will only ask for one band at a time
1657 * so using channels[0] here is ok
1658 */
1659 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1660 req->channels[0]->band);
1661 if (ret) {
1662 priv->scan_request = NULL;
1663 priv->scan_vif = NULL;
1664 }
1665 }
1666
1667 IWL_DEBUG_MAC80211(priv, "leave\n");
1668
1669 mutex_unlock(&priv->mutex);
1670
1671 return ret;
1672 }
1673
1674 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1675 {
1676 struct iwl_addsta_cmd cmd = {
1677 .mode = STA_CONTROL_MODIFY_MSK,
1678 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1679 .sta.sta_id = sta_id,
1680 };
1681
1682 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1683 }
1684
1685 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1686 struct ieee80211_vif *vif,
1687 enum sta_notify_cmd cmd,
1688 struct ieee80211_sta *sta)
1689 {
1690 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1691 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1692 int sta_id;
1693
1694 IWL_DEBUG_MAC80211(priv, "enter\n");
1695
1696 switch (cmd) {
1697 case STA_NOTIFY_SLEEP:
1698 WARN_ON(!sta_priv->client);
1699 sta_priv->asleep = true;
1700 if (atomic_read(&sta_priv->pending_frames) > 0)
1701 ieee80211_sta_block_awake(hw, sta, true);
1702 break;
1703 case STA_NOTIFY_AWAKE:
1704 WARN_ON(!sta_priv->client);
1705 if (!sta_priv->asleep)
1706 break;
1707 sta_priv->asleep = false;
1708 sta_id = iwl_sta_id(sta);
1709 if (sta_id != IWL_INVALID_STATION)
1710 iwl_sta_modify_ps_wake(priv, sta_id);
1711 break;
1712 default:
1713 break;
1714 }
1715 IWL_DEBUG_MAC80211(priv, "leave\n");
1716 }
1717
1718 struct ieee80211_ops iwlagn_hw_ops = {
1719 .tx = iwlagn_mac_tx,
1720 .start = iwlagn_mac_start,
1721 .stop = iwlagn_mac_stop,
1722 #ifdef CONFIG_PM_SLEEP
1723 .suspend = iwlagn_mac_suspend,
1724 .resume = iwlagn_mac_resume,
1725 .set_wakeup = iwlagn_mac_set_wakeup,
1726 #endif
1727 .add_interface = iwlagn_mac_add_interface,
1728 .remove_interface = iwlagn_mac_remove_interface,
1729 .change_interface = iwlagn_mac_change_interface,
1730 .config = iwlagn_mac_config,
1731 .configure_filter = iwlagn_configure_filter,
1732 .set_key = iwlagn_mac_set_key,
1733 .update_tkip_key = iwlagn_mac_update_tkip_key,
1734 .set_rekey_data = iwlagn_mac_set_rekey_data,
1735 .conf_tx = iwlagn_mac_conf_tx,
1736 .bss_info_changed = iwlagn_bss_info_changed,
1737 .ampdu_action = iwlagn_mac_ampdu_action,
1738 .hw_scan = iwlagn_mac_hw_scan,
1739 .sta_notify = iwlagn_mac_sta_notify,
1740 .sta_state = iwlagn_mac_sta_state,
1741 .channel_switch = iwlagn_mac_channel_switch,
1742 .flush = iwlagn_mac_flush,
1743 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1744 .remain_on_channel = iwlagn_mac_remain_on_channel,
1745 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1746 .rssi_callback = iwlagn_mac_rssi_callback,
1747 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1748 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1749 .set_tim = iwlagn_mac_set_tim,
1750 };
1751
1752 /* This function both allocates and initializes hw and priv. */
1753 struct ieee80211_hw *iwl_alloc_all(void)
1754 {
1755 struct iwl_priv *priv;
1756 struct iwl_op_mode *op_mode;
1757 /* mac80211 allocates memory for this device instance, including
1758 * space for this driver's private structure */
1759 struct ieee80211_hw *hw;
1760
1761 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1762 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1763 if (!hw)
1764 goto out;
1765
1766 op_mode = hw->priv;
1767 priv = IWL_OP_MODE_GET_DVM(op_mode);
1768 priv->hw = hw;
1769
1770 out:
1771 return hw;
1772 }
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