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Linux 3.11-rc3
[cris-mirror.git] / drivers / net / wireless / iwlwifi / dvm / mac80211.c
blob822f1a00efbb7c5f40ed3edf7ca14f11103d49cc
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 priv->wowlan_support.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 priv->wowlan_support.flags |=
217 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
218 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
219
220 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
221 priv->wowlan_support.pattern_min_len =
222 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
223 priv->wowlan_support.pattern_max_len =
224 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
225 hw->wiphy->wowlan = &priv->wowlan_support;
226 }
227 #endif
228
229 if (iwlwifi_mod_params.power_save)
230 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
231 else
232 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
233
234 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
235 /* we create the 802.11 header and a max-length SSID element */
236 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
237
238 /*
239 * We don't use all queues: 4 and 9 are unused and any
240 * aggregation queue gets mapped down to the AC queue.
241 */
242 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
243
244 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
245
246 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
247 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
248 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
249 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
250 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
251 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
252
253 hw->wiphy->hw_version = priv->trans->hw_id;
254
255 iwl_leds_init(priv);
256
257 ret = ieee80211_register_hw(priv->hw);
258 if (ret) {
259 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
260 iwl_leds_exit(priv);
261 return ret;
262 }
263 priv->mac80211_registered = 1;
264
265 return 0;
266 }
267
268 void iwlagn_mac_unregister(struct iwl_priv *priv)
269 {
270 if (!priv->mac80211_registered)
271 return;
272 iwl_leds_exit(priv);
273 ieee80211_unregister_hw(priv->hw);
274 priv->mac80211_registered = 0;
275 }
276
277 static int __iwl_up(struct iwl_priv *priv)
278 {
279 struct iwl_rxon_context *ctx;
280 int ret;
281
282 lockdep_assert_held(&priv->mutex);
283
284 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
285 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
286 return -EIO;
287 }
288
289 for_each_context(priv, ctx) {
290 ret = iwlagn_alloc_bcast_station(priv, ctx);
291 if (ret) {
292 iwl_dealloc_bcast_stations(priv);
293 return ret;
294 }
295 }
296
297 ret = iwl_run_init_ucode(priv);
298 if (ret) {
299 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
300 goto error;
301 }
302
303 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
304 if (ret) {
305 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
306 goto error;
307 }
308
309 ret = iwl_alive_start(priv);
310 if (ret)
311 goto error;
312 return 0;
313
314 error:
315 set_bit(STATUS_EXIT_PENDING, &priv->status);
316 iwl_down(priv);
317 clear_bit(STATUS_EXIT_PENDING, &priv->status);
318
319 IWL_ERR(priv, "Unable to initialize device.\n");
320 return ret;
321 }
322
323 static int iwlagn_mac_start(struct ieee80211_hw *hw)
324 {
325 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
326 int ret;
327
328 IWL_DEBUG_MAC80211(priv, "enter\n");
329
330 /* we should be verifying the device is ready to be opened */
331 mutex_lock(&priv->mutex);
332 ret = __iwl_up(priv);
333 mutex_unlock(&priv->mutex);
334 if (ret)
335 return ret;
336
337 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
338
339 /* Now we should be done, and the READY bit should be set. */
340 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
341 ret = -EIO;
342
343 iwlagn_led_enable(priv);
344
345 priv->is_open = 1;
346 IWL_DEBUG_MAC80211(priv, "leave\n");
347 return 0;
348 }
349
350 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
351 {
352 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
353
354 IWL_DEBUG_MAC80211(priv, "enter\n");
355
356 if (!priv->is_open)
357 return;
358
359 priv->is_open = 0;
360
361 mutex_lock(&priv->mutex);
362 iwl_down(priv);
363 mutex_unlock(&priv->mutex);
364
365 iwl_cancel_deferred_work(priv);
366
367 flush_workqueue(priv->workqueue);
368
369 /* User space software may expect getting rfkill changes
370 * even if interface is down, trans->down will leave the RF
371 * kill interrupt enabled
372 */
373 iwl_trans_stop_hw(priv->trans, false);
374
375 IWL_DEBUG_MAC80211(priv, "leave\n");
376 }
377
378 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
379 struct ieee80211_vif *vif,
380 struct cfg80211_gtk_rekey_data *data)
381 {
382 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
383
384 if (iwlwifi_mod_params.sw_crypto)
385 return;
386
387 IWL_DEBUG_MAC80211(priv, "enter\n");
388 mutex_lock(&priv->mutex);
389
390 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
391 goto out;
392
393 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
394 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
395 priv->replay_ctr =
396 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
397 priv->have_rekey_data = true;
398
399 out:
400 mutex_unlock(&priv->mutex);
401 IWL_DEBUG_MAC80211(priv, "leave\n");
402 }
403
404 #ifdef CONFIG_PM_SLEEP
405
406 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
407 struct cfg80211_wowlan *wowlan)
408 {
409 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
410 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
411 int ret;
412
413 if (WARN_ON(!wowlan))
414 return -EINVAL;
415
416 IWL_DEBUG_MAC80211(priv, "enter\n");
417 mutex_lock(&priv->mutex);
418
419 /* Don't attempt WoWLAN when not associated, tear down instead. */
420 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
421 !iwl_is_associated_ctx(ctx)) {
422 ret = 1;
423 goto out;
424 }
425
426 ret = iwlagn_suspend(priv, wowlan);
427 if (ret)
428 goto error;
429
430 /* let the ucode operate on its own */
431 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
432 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
433
434 iwl_trans_d3_suspend(priv->trans, false);
435
436 goto out;
437
438 error:
439 priv->wowlan = false;
440 iwlagn_prepare_restart(priv);
441 ieee80211_restart_hw(priv->hw);
442 out:
443 mutex_unlock(&priv->mutex);
444 IWL_DEBUG_MAC80211(priv, "leave\n");
445
446 return ret;
447 }
448
449 struct iwl_resume_data {
450 struct iwl_priv *priv;
451 struct iwlagn_wowlan_status *cmd;
452 bool valid;
453 };
454
455 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
456 struct iwl_rx_packet *pkt, void *data)
457 {
458 struct iwl_resume_data *resume_data = data;
459 struct iwl_priv *priv = resume_data->priv;
460 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
461
462 if (len - 4 != sizeof(*resume_data->cmd)) {
463 IWL_ERR(priv, "rx wrong size data\n");
464 return true;
465 }
466 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
467 resume_data->valid = true;
468
469 return true;
470 }
471
472 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
473 {
474 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
475 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
476 struct ieee80211_vif *vif;
477 u32 base;
478 int ret;
479 enum iwl_d3_status d3_status;
480 struct error_table_start {
481 /* cf. struct iwl_error_event_table */
482 u32 valid;
483 u32 error_id;
484 } err_info;
485 struct iwl_notification_wait status_wait;
486 static const u8 status_cmd[] = {
487 REPLY_WOWLAN_GET_STATUS,
488 };
489 struct iwlagn_wowlan_status status_data = {};
490 struct iwl_resume_data resume_data = {
491 .priv = priv,
492 .cmd = &status_data,
493 .valid = false,
494 };
495 struct cfg80211_wowlan_wakeup wakeup = {
496 .pattern_idx = -1,
497 };
498 #ifdef CONFIG_IWLWIFI_DEBUGFS
499 const struct fw_img *img;
500 #endif
501
502 IWL_DEBUG_MAC80211(priv, "enter\n");
503 mutex_lock(&priv->mutex);
504
505 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
506 vif = ctx->vif;
507
508 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false);
509 if (ret)
510 goto out_unlock;
511
512 if (d3_status != IWL_D3_STATUS_ALIVE) {
513 IWL_INFO(priv, "Device was reset during suspend\n");
514 goto out_unlock;
515 }
516
517 /* uCode is no longer operating by itself */
518 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
519 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
520
521 base = priv->device_pointers.error_event_table;
522 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
523 IWL_WARN(priv, "Invalid error table during resume!\n");
524 goto out_unlock;
525 }
526
527 iwl_trans_read_mem_bytes(priv->trans, base,
528 &err_info, sizeof(err_info));
529
530 if (err_info.valid) {
531 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
532 err_info.valid, err_info.error_id);
533 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
534 wakeup.rfkill_release = true;
535 ieee80211_report_wowlan_wakeup(vif, &wakeup,
536 GFP_KERNEL);
537 }
538 goto out_unlock;
539 }
540
541 #ifdef CONFIG_IWLWIFI_DEBUGFS
542 img = &priv->fw->img[IWL_UCODE_WOWLAN];
543 if (!priv->wowlan_sram)
544 priv->wowlan_sram =
545 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
546 GFP_KERNEL);
547
548 if (priv->wowlan_sram)
549 iwl_trans_read_mem(priv->trans, 0x800000,
550 priv->wowlan_sram,
551 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
552 #endif
553
554 /*
555 * This is very strange. The GET_STATUS command is sent but the device
556 * doesn't reply properly, it seems it doesn't close the RBD so one is
557 * always left open ... As a result, we need to send another command
558 * and have to reset the driver afterwards. As we need to switch to
559 * runtime firmware again that'll happen.
560 */
561
562 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
563 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
564 &resume_data);
565
566 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
567 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
568 /* an RBD is left open in the firmware now! */
569
570 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
571 if (ret)
572 goto out_unlock;
573
574 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
575 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
576 struct cfg80211_wowlan_wakeup *wakeup_report;
577
578 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
579
580 if (reasons) {
581 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
582 wakeup.magic_pkt = true;
583 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
584 wakeup.pattern_idx = status_data.pattern_number;
585 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
586 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
587 wakeup.disconnect = true;
588 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
589 wakeup.gtk_rekey_failure = true;
590 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
591 wakeup.eap_identity_req = true;
592 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
593 wakeup.four_way_handshake = true;
594 wakeup_report = &wakeup;
595 } else {
596 wakeup_report = NULL;
597 }
598
599 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
600 }
601
602 priv->wowlan = false;
603
604 iwlagn_prepare_restart(priv);
605
606 memset((void *)&ctx->active, 0, sizeof(ctx->active));
607 iwl_connection_init_rx_config(priv, ctx);
608 iwlagn_set_rxon_chain(priv, ctx);
609
610 out_unlock:
611 mutex_unlock(&priv->mutex);
612 IWL_DEBUG_MAC80211(priv, "leave\n");
613
614 ieee80211_resume_disconnect(vif);
615
616 return 1;
617 }
618
619 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
620 {
621 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
622
623 device_set_wakeup_enable(priv->trans->dev, enabled);
624 }
625 #endif
626
627 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
628 struct ieee80211_tx_control *control,
629 struct sk_buff *skb)
630 {
631 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
632
633 if (iwlagn_tx_skb(priv, control->sta, skb))
634 ieee80211_free_txskb(hw, skb);
635 }
636
637 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
638 struct ieee80211_vif *vif,
639 struct ieee80211_key_conf *keyconf,
640 struct ieee80211_sta *sta,
641 u32 iv32, u16 *phase1key)
642 {
643 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
644
645 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
646 }
647
648 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
649 struct ieee80211_vif *vif,
650 struct ieee80211_sta *sta,
651 struct ieee80211_key_conf *key)
652 {
653 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
654 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
655 struct iwl_rxon_context *ctx = vif_priv->ctx;
656 int ret;
657 bool is_default_wep_key = false;
658
659 IWL_DEBUG_MAC80211(priv, "enter\n");
660
661 if (iwlwifi_mod_params.sw_crypto) {
662 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
663 return -EOPNOTSUPP;
664 }
665
666 switch (key->cipher) {
667 case WLAN_CIPHER_SUITE_TKIP:
668 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
669 /* fall through */
670 case WLAN_CIPHER_SUITE_CCMP:
671 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
672 break;
673 default:
674 break;
675 }
676
677 /*
678 * We could program these keys into the hardware as well, but we
679 * don't expect much multicast traffic in IBSS and having keys
680 * for more stations is probably more useful.
681 *
682 * Mark key TX-only and return 0.
683 */
684 if (vif->type == NL80211_IFTYPE_ADHOC &&
685 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
686 key->hw_key_idx = WEP_INVALID_OFFSET;
687 return 0;
688 }
689
690 /* If they key was TX-only, accept deletion */
691 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
692 return 0;
693
694 mutex_lock(&priv->mutex);
695 iwl_scan_cancel_timeout(priv, 100);
696
697 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
698
699 /*
700 * If we are getting WEP group key and we didn't receive any key mapping
701 * so far, we are in legacy wep mode (group key only), otherwise we are
702 * in 1X mode.
703 * In legacy wep mode, we use another host command to the uCode.
704 */
705 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
706 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
707 if (cmd == SET_KEY)
708 is_default_wep_key = !ctx->key_mapping_keys;
709 else
710 is_default_wep_key =
711 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
712 }
713
714
715 switch (cmd) {
716 case SET_KEY:
717 if (is_default_wep_key) {
718 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
719 break;
720 }
721 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
722 if (ret) {
723 /*
724 * can't add key for RX, but we don't need it
725 * in the device for TX so still return 0
726 */
727 ret = 0;
728 key->hw_key_idx = WEP_INVALID_OFFSET;
729 }
730
731 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
732 break;
733 case DISABLE_KEY:
734 if (is_default_wep_key)
735 ret = iwl_remove_default_wep_key(priv, ctx, key);
736 else
737 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
738
739 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
740 break;
741 default:
742 ret = -EINVAL;
743 }
744
745 mutex_unlock(&priv->mutex);
746 IWL_DEBUG_MAC80211(priv, "leave\n");
747
748 return ret;
749 }
750
751 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
752 struct ieee80211_vif *vif,
753 enum ieee80211_ampdu_mlme_action action,
754 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
755 u8 buf_size)
756 {
757 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
758 int ret = -EINVAL;
759 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
760
761 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
762 sta->addr, tid);
763
764 if (!(priv->nvm_data->sku_cap_11n_enable))
765 return -EACCES;
766
767 IWL_DEBUG_MAC80211(priv, "enter\n");
768 mutex_lock(&priv->mutex);
769
770 switch (action) {
771 case IEEE80211_AMPDU_RX_START:
772 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
773 break;
774 IWL_DEBUG_HT(priv, "start Rx\n");
775 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
776 break;
777 case IEEE80211_AMPDU_RX_STOP:
778 IWL_DEBUG_HT(priv, "stop Rx\n");
779 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
780 break;
781 case IEEE80211_AMPDU_TX_START:
782 if (!priv->trans->ops->txq_enable)
783 break;
784 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
785 break;
786 IWL_DEBUG_HT(priv, "start Tx\n");
787 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
788 break;
789 case IEEE80211_AMPDU_TX_STOP_FLUSH:
790 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
791 IWL_DEBUG_HT(priv, "Flush Tx\n");
792 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
793 break;
794 case IEEE80211_AMPDU_TX_STOP_CONT:
795 IWL_DEBUG_HT(priv, "stop Tx\n");
796 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
797 if ((ret == 0) && (priv->agg_tids_count > 0)) {
798 priv->agg_tids_count--;
799 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
800 priv->agg_tids_count);
801 }
802 if (!priv->agg_tids_count &&
803 priv->hw_params.use_rts_for_aggregation) {
804 /*
805 * switch off RTS/CTS if it was previously enabled
806 */
807 sta_priv->lq_sta.lq.general_params.flags &=
808 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
809 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
810 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
811 }
812 break;
813 case IEEE80211_AMPDU_TX_OPERATIONAL:
814 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
815 break;
816 }
817 mutex_unlock(&priv->mutex);
818 IWL_DEBUG_MAC80211(priv, "leave\n");
819 return ret;
820 }
821
822 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
823 struct ieee80211_vif *vif,
824 struct ieee80211_sta *sta)
825 {
826 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
827 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
828 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
829 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
830 int ret;
831 u8 sta_id;
832
833 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
834 sta->addr);
835 sta_priv->sta_id = IWL_INVALID_STATION;
836
837 atomic_set(&sta_priv->pending_frames, 0);
838 if (vif->type == NL80211_IFTYPE_AP)
839 sta_priv->client = true;
840
841 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
842 is_ap, sta, &sta_id);
843 if (ret) {
844 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
845 sta->addr, ret);
846 /* Should we return success if return code is EEXIST ? */
847 return ret;
848 }
849
850 sta_priv->sta_id = sta_id;
851
852 return 0;
853 }
854
855 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
856 struct ieee80211_vif *vif,
857 struct ieee80211_sta *sta)
858 {
859 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
860 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
861 int ret;
862
863 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
864
865 if (vif->type == NL80211_IFTYPE_STATION) {
866 /*
867 * Station will be removed from device when the RXON
868 * is set to unassociated -- just deactivate it here
869 * to avoid re-programming it.
870 */
871 ret = 0;
872 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
873 } else {
874 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
875 if (ret)
876 IWL_DEBUG_QUIET_RFKILL(priv,
877 "Error removing station %pM\n", sta->addr);
878 }
879 return ret;
880 }
881
882 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
883 struct ieee80211_vif *vif,
884 struct ieee80211_sta *sta,
885 enum ieee80211_sta_state old_state,
886 enum ieee80211_sta_state new_state)
887 {
888 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
889 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
890 enum {
891 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
892 } op = NONE;
893 int ret;
894
895 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
896 sta->addr, old_state, new_state);
897
898 mutex_lock(&priv->mutex);
899 if (vif->type == NL80211_IFTYPE_STATION) {
900 if (old_state == IEEE80211_STA_NOTEXIST &&
901 new_state == IEEE80211_STA_NONE)
902 op = ADD;
903 else if (old_state == IEEE80211_STA_NONE &&
904 new_state == IEEE80211_STA_NOTEXIST)
905 op = REMOVE;
906 else if (old_state == IEEE80211_STA_AUTH &&
907 new_state == IEEE80211_STA_ASSOC)
908 op = HT_RATE_INIT;
909 } else {
910 if (old_state == IEEE80211_STA_AUTH &&
911 new_state == IEEE80211_STA_ASSOC)
912 op = ADD_RATE_INIT;
913 else if (old_state == IEEE80211_STA_ASSOC &&
914 new_state == IEEE80211_STA_AUTH)
915 op = REMOVE;
916 }
917
918 switch (op) {
919 case ADD:
920 ret = iwlagn_mac_sta_add(hw, vif, sta);
921 if (ret)
922 break;
923 /*
924 * Clear the in-progress flag, the AP station entry was added
925 * but we'll initialize LQ only when we've associated (which
926 * would also clear the in-progress flag). This is necessary
927 * in case we never initialize LQ because association fails.
928 */
929 spin_lock_bh(&priv->sta_lock);
930 priv->stations[iwl_sta_id(sta)].used &=
931 ~IWL_STA_UCODE_INPROGRESS;
932 spin_unlock_bh(&priv->sta_lock);
933 break;
934 case REMOVE:
935 ret = iwlagn_mac_sta_remove(hw, vif, sta);
936 break;
937 case ADD_RATE_INIT:
938 ret = iwlagn_mac_sta_add(hw, vif, sta);
939 if (ret)
940 break;
941 /* Initialize rate scaling */
942 IWL_DEBUG_INFO(priv,
943 "Initializing rate scaling for station %pM\n",
944 sta->addr);
945 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
946 ret = 0;
947 break;
948 case HT_RATE_INIT:
949 /* Initialize rate scaling */
950 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
951 if (ret)
952 break;
953 IWL_DEBUG_INFO(priv,
954 "Initializing rate scaling for station %pM\n",
955 sta->addr);
956 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
957 ret = 0;
958 break;
959 default:
960 ret = 0;
961 break;
962 }
963
964 /*
965 * mac80211 might WARN if we fail, but due the way we
966 * (badly) handle hard rfkill, we might fail here
967 */
968 if (iwl_is_rfkill(priv))
969 ret = 0;
970
971 mutex_unlock(&priv->mutex);
972 IWL_DEBUG_MAC80211(priv, "leave\n");
973
974 return ret;
975 }
976
977 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
978 struct ieee80211_channel_switch *ch_switch)
979 {
980 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
981 struct ieee80211_conf *conf = &hw->conf;
982 struct ieee80211_channel *channel = ch_switch->chandef.chan;
983 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
984 /*
985 * MULTI-FIXME
986 * When we add support for multiple interfaces, we need to
987 * revisit this. The channel switch command in the device
988 * only affects the BSS context, but what does that really
989 * mean? And what if we get a CSA on the second interface?
990 * This needs a lot of work.
991 */
992 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
993 u16 ch;
994
995 IWL_DEBUG_MAC80211(priv, "enter\n");
996
997 mutex_lock(&priv->mutex);
998
999 if (iwl_is_rfkill(priv))
1000 goto out;
1001
1002 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1003 test_bit(STATUS_SCANNING, &priv->status) ||
1004 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1005 goto out;
1006
1007 if (!iwl_is_associated_ctx(ctx))
1008 goto out;
1009
1010 if (!priv->lib->set_channel_switch)
1011 goto out;
1012
1013 ch = channel->hw_value;
1014 if (le16_to_cpu(ctx->active.channel) == ch)
1015 goto out;
1016
1017 priv->current_ht_config.smps = conf->smps_mode;
1018
1019 /* Configure HT40 channels */
1020 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
1021 case NL80211_CHAN_NO_HT:
1022 case NL80211_CHAN_HT20:
1023 ctx->ht.is_40mhz = false;
1024 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1025 break;
1026 case NL80211_CHAN_HT40MINUS:
1027 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1028 ctx->ht.is_40mhz = true;
1029 break;
1030 case NL80211_CHAN_HT40PLUS:
1031 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1032 ctx->ht.is_40mhz = true;
1033 break;
1034 }
1035
1036 if ((le16_to_cpu(ctx->staging.channel) != ch))
1037 ctx->staging.flags = 0;
1038
1039 iwl_set_rxon_channel(priv, channel, ctx);
1040 iwl_set_rxon_ht(priv, ht_conf);
1041 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1042
1043 /*
1044 * at this point, staging_rxon has the
1045 * configuration for channel switch
1046 */
1047 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1048 priv->switch_channel = cpu_to_le16(ch);
1049 if (priv->lib->set_channel_switch(priv, ch_switch)) {
1050 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1051 priv->switch_channel = 0;
1052 ieee80211_chswitch_done(ctx->vif, false);
1053 }
1054
1055 out:
1056 mutex_unlock(&priv->mutex);
1057 IWL_DEBUG_MAC80211(priv, "leave\n");
1058 }
1059
1060 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1061 {
1062 /*
1063 * MULTI-FIXME
1064 * See iwlagn_mac_channel_switch.
1065 */
1066 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1067
1068 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1069 return;
1070
1071 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1072 ieee80211_chswitch_done(ctx->vif, is_success);
1073 }
1074
1075 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1076 unsigned int changed_flags,
1077 unsigned int *total_flags,
1078 u64 multicast)
1079 {
1080 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1081 __le32 filter_or = 0, filter_nand = 0;
1082 struct iwl_rxon_context *ctx;
1083
1084 #define CHK(test, flag) do { \
1085 if (*total_flags & (test)) \
1086 filter_or |= (flag); \
1087 else \
1088 filter_nand |= (flag); \
1089 } while (0)
1090
1091 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1092 changed_flags, *total_flags);
1093
1094 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1095 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1096 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1097 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1098
1099 #undef CHK
1100
1101 mutex_lock(&priv->mutex);
1102
1103 for_each_context(priv, ctx) {
1104 ctx->staging.filter_flags &= ~filter_nand;
1105 ctx->staging.filter_flags |= filter_or;
1106
1107 /*
1108 * Not committing directly because hardware can perform a scan,
1109 * but we'll eventually commit the filter flags change anyway.
1110 */
1111 }
1112
1113 mutex_unlock(&priv->mutex);
1114
1115 /*
1116 * Receiving all multicast frames is always enabled by the
1117 * default flags setup in iwl_connection_init_rx_config()
1118 * since we currently do not support programming multicast
1119 * filters into the device.
1120 */
1121 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1122 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1123 }
1124
1125 static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1126 {
1127 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1128
1129 mutex_lock(&priv->mutex);
1130 IWL_DEBUG_MAC80211(priv, "enter\n");
1131
1132 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1133 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1134 goto done;
1135 }
1136 if (iwl_is_rfkill(priv)) {
1137 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1138 goto done;
1139 }
1140
1141 /*
1142 * mac80211 will not push any more frames for transmit
1143 * until the flush is completed
1144 */
1145 if (drop) {
1146 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1147 if (iwlagn_txfifo_flush(priv, 0)) {
1148 IWL_ERR(priv, "flush request fail\n");
1149 goto done;
1150 }
1151 }
1152 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1153 iwl_trans_wait_tx_queue_empty(priv->trans);
1154 done:
1155 mutex_unlock(&priv->mutex);
1156 IWL_DEBUG_MAC80211(priv, "leave\n");
1157 }
1158
1159 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1160 struct ieee80211_vif *vif,
1161 struct ieee80211_channel *channel,
1162 int duration,
1163 enum ieee80211_roc_type type)
1164 {
1165 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1166 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1167 int err = 0;
1168
1169 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1170 return -EOPNOTSUPP;
1171
1172 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1173 return -EOPNOTSUPP;
1174
1175 IWL_DEBUG_MAC80211(priv, "enter\n");
1176 mutex_lock(&priv->mutex);
1177
1178 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1179 /* mac80211 should not scan while ROC or ROC while scanning */
1180 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1181 err = -EBUSY;
1182 goto out;
1183 }
1184
1185 iwl_scan_cancel_timeout(priv, 100);
1186
1187 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1188 err = -EBUSY;
1189 goto out;
1190 }
1191 }
1192
1193 priv->hw_roc_channel = channel;
1194 /* convert from ms to TU */
1195 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1196 priv->hw_roc_start_notified = false;
1197 cancel_delayed_work(&priv->hw_roc_disable_work);
1198
1199 if (!ctx->is_active) {
1200 static const struct iwl_qos_info default_qos_data = {
1201 .def_qos_parm = {
1202 .ac[0] = {
1203 .cw_min = cpu_to_le16(3),
1204 .cw_max = cpu_to_le16(7),
1205 .aifsn = 2,
1206 .edca_txop = cpu_to_le16(1504),
1207 },
1208 .ac[1] = {
1209 .cw_min = cpu_to_le16(7),
1210 .cw_max = cpu_to_le16(15),
1211 .aifsn = 2,
1212 .edca_txop = cpu_to_le16(3008),
1213 },
1214 .ac[2] = {
1215 .cw_min = cpu_to_le16(15),
1216 .cw_max = cpu_to_le16(1023),
1217 .aifsn = 3,
1218 },
1219 .ac[3] = {
1220 .cw_min = cpu_to_le16(15),
1221 .cw_max = cpu_to_le16(1023),
1222 .aifsn = 7,
1223 },
1224 },
1225 };
1226
1227 ctx->is_active = true;
1228 ctx->qos_data = default_qos_data;
1229 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1230 memcpy(ctx->staging.node_addr,
1231 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1232 ETH_ALEN);
1233 memcpy(ctx->staging.bssid_addr,
1234 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1235 ETH_ALEN);
1236 err = iwlagn_commit_rxon(priv, ctx);
1237 if (err)
1238 goto out;
1239 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1240 RXON_FILTER_PROMISC_MSK |
1241 RXON_FILTER_CTL2HOST_MSK;
1242
1243 err = iwlagn_commit_rxon(priv, ctx);
1244 if (err) {
1245 iwlagn_disable_roc(priv);
1246 goto out;
1247 }
1248 priv->hw_roc_setup = true;
1249 }
1250
1251 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1252 if (err)
1253 iwlagn_disable_roc(priv);
1254
1255 out:
1256 mutex_unlock(&priv->mutex);
1257 IWL_DEBUG_MAC80211(priv, "leave\n");
1258
1259 return err;
1260 }
1261
1262 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1263 {
1264 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1265
1266 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1267 return -EOPNOTSUPP;
1268
1269 IWL_DEBUG_MAC80211(priv, "enter\n");
1270 mutex_lock(&priv->mutex);
1271 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1272 iwlagn_disable_roc(priv);
1273 mutex_unlock(&priv->mutex);
1274 IWL_DEBUG_MAC80211(priv, "leave\n");
1275
1276 return 0;
1277 }
1278
1279 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1280 struct ieee80211_vif *vif,
1281 enum ieee80211_rssi_event rssi_event)
1282 {
1283 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1284
1285 IWL_DEBUG_MAC80211(priv, "enter\n");
1286 mutex_lock(&priv->mutex);
1287
1288 if (priv->lib->bt_params &&
1289 priv->lib->bt_params->advanced_bt_coexist) {
1290 if (rssi_event == RSSI_EVENT_LOW)
1291 priv->bt_enable_pspoll = true;
1292 else if (rssi_event == RSSI_EVENT_HIGH)
1293 priv->bt_enable_pspoll = false;
1294
1295 iwlagn_send_advance_bt_config(priv);
1296 } else {
1297 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1298 "ignoring RSSI callback\n");
1299 }
1300
1301 mutex_unlock(&priv->mutex);
1302 IWL_DEBUG_MAC80211(priv, "leave\n");
1303 }
1304
1305 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1306 struct ieee80211_sta *sta, bool set)
1307 {
1308 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1309
1310 queue_work(priv->workqueue, &priv->beacon_update);
1311
1312 return 0;
1313 }
1314
1315 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1316 struct ieee80211_vif *vif, u16 queue,
1317 const struct ieee80211_tx_queue_params *params)
1318 {
1319 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1320 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1321 struct iwl_rxon_context *ctx = vif_priv->ctx;
1322 int q;
1323
1324 if (WARN_ON(!ctx))
1325 return -EINVAL;
1326
1327 IWL_DEBUG_MAC80211(priv, "enter\n");
1328
1329 if (!iwl_is_ready_rf(priv)) {
1330 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1331 return -EIO;
1332 }
1333
1334 if (queue >= AC_NUM) {
1335 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1336 return 0;
1337 }
1338
1339 q = AC_NUM - 1 - queue;
1340
1341 mutex_lock(&priv->mutex);
1342
1343 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1344 cpu_to_le16(params->cw_min);
1345 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1346 cpu_to_le16(params->cw_max);
1347 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1348 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1349 cpu_to_le16((params->txop * 32));
1350
1351 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1352
1353 mutex_unlock(&priv->mutex);
1354
1355 IWL_DEBUG_MAC80211(priv, "leave\n");
1356 return 0;
1357 }
1358
1359 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1360 {
1361 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1362
1363 return priv->ibss_manager == IWL_IBSS_MANAGER;
1364 }
1365
1366 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1367 {
1368 iwl_connection_init_rx_config(priv, ctx);
1369
1370 iwlagn_set_rxon_chain(priv, ctx);
1371
1372 return iwlagn_commit_rxon(priv, ctx);
1373 }
1374
1375 static int iwl_setup_interface(struct iwl_priv *priv,
1376 struct iwl_rxon_context *ctx)
1377 {
1378 struct ieee80211_vif *vif = ctx->vif;
1379 int err, ac;
1380
1381 lockdep_assert_held(&priv->mutex);
1382
1383 /*
1384 * This variable will be correct only when there's just
1385 * a single context, but all code using it is for hardware
1386 * that supports only one context.
1387 */
1388 priv->iw_mode = vif->type;
1389
1390 ctx->is_active = true;
1391
1392 err = iwl_set_mode(priv, ctx);
1393 if (err) {
1394 if (!ctx->always_active)
1395 ctx->is_active = false;
1396 return err;
1397 }
1398
1399 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1400 vif->type == NL80211_IFTYPE_ADHOC) {
1401 /*
1402 * pretend to have high BT traffic as long as we
1403 * are operating in IBSS mode, as this will cause
1404 * the rate scaling etc. to behave as intended.
1405 */
1406 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1407 }
1408
1409 /* set up queue mappings */
1410 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1411 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1412
1413 if (vif->type == NL80211_IFTYPE_AP)
1414 vif->cab_queue = ctx->mcast_queue;
1415 else
1416 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1417
1418 return 0;
1419 }
1420
1421 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1422 struct ieee80211_vif *vif)
1423 {
1424 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1425 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1426 struct iwl_rxon_context *tmp, *ctx = NULL;
1427 int err;
1428 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1429 bool reset = false;
1430
1431 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1432 viftype, vif->addr);
1433
1434 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1435
1436 mutex_lock(&priv->mutex);
1437
1438 iwlagn_disable_roc(priv);
1439
1440 if (!iwl_is_ready_rf(priv)) {
1441 IWL_WARN(priv, "Try to add interface when device not ready\n");
1442 err = -EINVAL;
1443 goto out;
1444 }
1445
1446 for_each_context(priv, tmp) {
1447 u32 possible_modes =
1448 tmp->interface_modes | tmp->exclusive_interface_modes;
1449
1450 if (tmp->vif) {
1451 /* On reset we need to add the same interface again */
1452 if (tmp->vif == vif) {
1453 reset = true;
1454 ctx = tmp;
1455 break;
1456 }
1457
1458 /* check if this busy context is exclusive */
1459 if (tmp->exclusive_interface_modes &
1460 BIT(tmp->vif->type)) {
1461 err = -EINVAL;
1462 goto out;
1463 }
1464 continue;
1465 }
1466
1467 if (!(possible_modes & BIT(viftype)))
1468 continue;
1469
1470 /* have maybe usable context w/o interface */
1471 ctx = tmp;
1472 break;
1473 }
1474
1475 if (!ctx) {
1476 err = -EOPNOTSUPP;
1477 goto out;
1478 }
1479
1480 vif_priv->ctx = ctx;
1481 ctx->vif = vif;
1482
1483 /*
1484 * In SNIFFER device type, the firmware reports the FCS to
1485 * the host, rather than snipping it off. Unfortunately,
1486 * mac80211 doesn't (yet) provide a per-packet flag for
1487 * this, so that we have to set the hardware flag based
1488 * on the interfaces added. As the monitor interface can
1489 * only be present by itself, and will be removed before
1490 * other interfaces are added, this is safe.
1491 */
1492 if (vif->type == NL80211_IFTYPE_MONITOR)
1493 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1494 else
1495 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1496
1497 err = iwl_setup_interface(priv, ctx);
1498 if (!err || reset)
1499 goto out;
1500
1501 ctx->vif = NULL;
1502 priv->iw_mode = NL80211_IFTYPE_STATION;
1503 out:
1504 mutex_unlock(&priv->mutex);
1505
1506 IWL_DEBUG_MAC80211(priv, "leave\n");
1507 return err;
1508 }
1509
1510 static void iwl_teardown_interface(struct iwl_priv *priv,
1511 struct ieee80211_vif *vif,
1512 bool mode_change)
1513 {
1514 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1515
1516 lockdep_assert_held(&priv->mutex);
1517
1518 if (priv->scan_vif == vif) {
1519 iwl_scan_cancel_timeout(priv, 200);
1520 iwl_force_scan_end(priv);
1521 }
1522
1523 if (!mode_change) {
1524 iwl_set_mode(priv, ctx);
1525 if (!ctx->always_active)
1526 ctx->is_active = false;
1527 }
1528
1529 /*
1530 * When removing the IBSS interface, overwrite the
1531 * BT traffic load with the stored one from the last
1532 * notification, if any. If this is a device that
1533 * doesn't implement this, this has no effect since
1534 * both values are the same and zero.
1535 */
1536 if (vif->type == NL80211_IFTYPE_ADHOC)
1537 priv->bt_traffic_load = priv->last_bt_traffic_load;
1538 }
1539
1540 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1541 struct ieee80211_vif *vif)
1542 {
1543 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1544 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1545
1546 IWL_DEBUG_MAC80211(priv, "enter\n");
1547
1548 mutex_lock(&priv->mutex);
1549
1550 if (WARN_ON(ctx->vif != vif)) {
1551 struct iwl_rxon_context *tmp;
1552 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1553 for_each_context(priv, tmp)
1554 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1555 tmp->ctxid, tmp, tmp->vif);
1556 }
1557 ctx->vif = NULL;
1558
1559 iwl_teardown_interface(priv, vif, false);
1560
1561 mutex_unlock(&priv->mutex);
1562
1563 IWL_DEBUG_MAC80211(priv, "leave\n");
1564
1565 }
1566
1567 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1568 struct ieee80211_vif *vif,
1569 enum nl80211_iftype newtype, bool newp2p)
1570 {
1571 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1572 struct iwl_rxon_context *ctx, *tmp;
1573 enum nl80211_iftype newviftype = newtype;
1574 u32 interface_modes;
1575 int err;
1576
1577 IWL_DEBUG_MAC80211(priv, "enter\n");
1578
1579 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1580
1581 mutex_lock(&priv->mutex);
1582
1583 ctx = iwl_rxon_ctx_from_vif(vif);
1584
1585 /*
1586 * To simplify this code, only support changes on the
1587 * BSS context. The PAN context is usually reassigned
1588 * by creating/removing P2P interfaces anyway.
1589 */
1590 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1591 err = -EBUSY;
1592 goto out;
1593 }
1594
1595 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1596 /*
1597 * Huh? But wait ... this can maybe happen when
1598 * we're in the middle of a firmware restart!
1599 */
1600 err = -EBUSY;
1601 goto out;
1602 }
1603
1604 /* Check if the switch is supported in the same context */
1605 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1606 if (!(interface_modes & BIT(newtype))) {
1607 err = -EBUSY;
1608 goto out;
1609 }
1610
1611 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1612 for_each_context(priv, tmp) {
1613 if (ctx == tmp)
1614 continue;
1615
1616 if (!tmp->is_active)
1617 continue;
1618
1619 /*
1620 * The current mode switch would be exclusive, but
1621 * another context is active ... refuse the switch.
1622 */
1623 err = -EBUSY;
1624 goto out;
1625 }
1626 }
1627
1628 /* success */
1629 iwl_teardown_interface(priv, vif, true);
1630 vif->type = newviftype;
1631 vif->p2p = newp2p;
1632 err = iwl_setup_interface(priv, ctx);
1633 WARN_ON(err);
1634 /*
1635 * We've switched internally, but submitting to the
1636 * device may have failed for some reason. Mask this
1637 * error, because otherwise mac80211 will not switch
1638 * (and set the interface type back) and we'll be
1639 * out of sync with it.
1640 */
1641 err = 0;
1642
1643 out:
1644 mutex_unlock(&priv->mutex);
1645 IWL_DEBUG_MAC80211(priv, "leave\n");
1646
1647 return err;
1648 }
1649
1650 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1651 struct ieee80211_vif *vif,
1652 struct cfg80211_scan_request *req)
1653 {
1654 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1655 int ret;
1656
1657 IWL_DEBUG_MAC80211(priv, "enter\n");
1658
1659 if (req->n_channels == 0)
1660 return -EINVAL;
1661
1662 mutex_lock(&priv->mutex);
1663
1664 /*
1665 * If an internal scan is in progress, just set
1666 * up the scan_request as per above.
1667 */
1668 if (priv->scan_type != IWL_SCAN_NORMAL) {
1669 IWL_DEBUG_SCAN(priv,
1670 "SCAN request during internal scan - defer\n");
1671 priv->scan_request = req;
1672 priv->scan_vif = vif;
1673 ret = 0;
1674 } else {
1675 priv->scan_request = req;
1676 priv->scan_vif = vif;
1677 /*
1678 * mac80211 will only ask for one band at a time
1679 * so using channels[0] here is ok
1680 */
1681 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1682 req->channels[0]->band);
1683 if (ret) {
1684 priv->scan_request = NULL;
1685 priv->scan_vif = NULL;
1686 }
1687 }
1688
1689 IWL_DEBUG_MAC80211(priv, "leave\n");
1690
1691 mutex_unlock(&priv->mutex);
1692
1693 return ret;
1694 }
1695
1696 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1697 {
1698 struct iwl_addsta_cmd cmd = {
1699 .mode = STA_CONTROL_MODIFY_MSK,
1700 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1701 .sta.sta_id = sta_id,
1702 };
1703
1704 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1705 }
1706
1707 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1708 struct ieee80211_vif *vif,
1709 enum sta_notify_cmd cmd,
1710 struct ieee80211_sta *sta)
1711 {
1712 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1713 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1714 int sta_id;
1715
1716 IWL_DEBUG_MAC80211(priv, "enter\n");
1717
1718 switch (cmd) {
1719 case STA_NOTIFY_SLEEP:
1720 WARN_ON(!sta_priv->client);
1721 sta_priv->asleep = true;
1722 if (atomic_read(&sta_priv->pending_frames) > 0)
1723 ieee80211_sta_block_awake(hw, sta, true);
1724 break;
1725 case STA_NOTIFY_AWAKE:
1726 WARN_ON(!sta_priv->client);
1727 if (!sta_priv->asleep)
1728 break;
1729 sta_priv->asleep = false;
1730 sta_id = iwl_sta_id(sta);
1731 if (sta_id != IWL_INVALID_STATION)
1732 iwl_sta_modify_ps_wake(priv, sta_id);
1733 break;
1734 default:
1735 break;
1736 }
1737 IWL_DEBUG_MAC80211(priv, "leave\n");
1738 }
1739
1740 struct ieee80211_ops iwlagn_hw_ops = {
1741 .tx = iwlagn_mac_tx,
1742 .start = iwlagn_mac_start,
1743 .stop = iwlagn_mac_stop,
1744 #ifdef CONFIG_PM_SLEEP
1745 .suspend = iwlagn_mac_suspend,
1746 .resume = iwlagn_mac_resume,
1747 .set_wakeup = iwlagn_mac_set_wakeup,
1748 #endif
1749 .add_interface = iwlagn_mac_add_interface,
1750 .remove_interface = iwlagn_mac_remove_interface,
1751 .change_interface = iwlagn_mac_change_interface,
1752 .config = iwlagn_mac_config,
1753 .configure_filter = iwlagn_configure_filter,
1754 .set_key = iwlagn_mac_set_key,
1755 .update_tkip_key = iwlagn_mac_update_tkip_key,
1756 .set_rekey_data = iwlagn_mac_set_rekey_data,
1757 .conf_tx = iwlagn_mac_conf_tx,
1758 .bss_info_changed = iwlagn_bss_info_changed,
1759 .ampdu_action = iwlagn_mac_ampdu_action,
1760 .hw_scan = iwlagn_mac_hw_scan,
1761 .sta_notify = iwlagn_mac_sta_notify,
1762 .sta_state = iwlagn_mac_sta_state,
1763 .channel_switch = iwlagn_mac_channel_switch,
1764 .flush = iwlagn_mac_flush,
1765 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1766 .remain_on_channel = iwlagn_mac_remain_on_channel,
1767 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1768 .rssi_callback = iwlagn_mac_rssi_callback,
1769 .set_tim = iwlagn_mac_set_tim,
1770 };
1771
1772 /* This function both allocates and initializes hw and priv. */
1773 struct ieee80211_hw *iwl_alloc_all(void)
1774 {
1775 struct iwl_priv *priv;
1776 struct iwl_op_mode *op_mode;
1777 /* mac80211 allocates memory for this device instance, including
1778 * space for this driver's private structure */
1779 struct ieee80211_hw *hw;
1780
1781 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1782 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1783 if (!hw)
1784 goto out;
1785
1786 op_mode = hw->priv;
1787 priv = IWL_OP_MODE_GET_DVM(op_mode);
1788 priv->hw = hw;
1789
1790 out:
1791 return hw;
1792 }
CRIS linux kernel tree