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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / dvm / mac80211.c
blobd6e6405a9b076d5bd5c3155bb372876b94efe421
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_combination
80 iwlagn_iface_combinations_dualmode[] = {
81 { .num_different_channels = 1,
82 .max_interfaces = 2,
83 .beacon_int_infra_match = true,
84 .limits = iwlagn_sta_ap_limits,
85 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
86 },
87 { .num_different_channels = 1,
88 .max_interfaces = 2,
89 .limits = iwlagn_2sta_limits,
90 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
91 },
92 };
93
94 /*
95 * Not a mac80211 entry point function, but it fits in with all the
96 * other mac80211 functions grouped here.
97 */
98 int iwlagn_mac_setup_register(struct iwl_priv *priv,
99 const struct iwl_ucode_capabilities *capa)
100 {
101 int ret;
102 struct ieee80211_hw *hw = priv->hw;
103 struct iwl_rxon_context *ctx;
104
105 hw->rate_control_algorithm = "iwl-agn-rs";
106
107 /* Tell mac80211 our characteristics */
108 hw->flags = IEEE80211_HW_SIGNAL_DBM |
109 IEEE80211_HW_AMPDU_AGGREGATION |
110 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
111 IEEE80211_HW_SPECTRUM_MGMT |
112 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
113 IEEE80211_HW_QUEUE_CONTROL |
114 IEEE80211_HW_SUPPORTS_PS |
115 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
116 IEEE80211_HW_WANT_MONITOR_VIF;
117
118 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
119 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
120
121 /*
122 * Including the following line will crash some AP's. This
123 * workaround removes the stimulus which causes the crash until
124 * the AP software can be fixed.
125 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
126 */
127
128 if (priv->nvm_data->sku_cap_11n_enable)
129 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
130 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
131
132 /*
133 * Enable 11w if advertised by firmware and software crypto
134 * is not enabled (as the firmware will interpret some mgmt
135 * packets, so enabling it with software crypto isn't safe)
136 */
137 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
138 !iwlwifi_mod_params.sw_crypto)
139 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
140
141 hw->sta_data_size = sizeof(struct iwl_station_priv);
142 hw->vif_data_size = sizeof(struct iwl_vif_priv);
143
144 for_each_context(priv, ctx) {
145 hw->wiphy->interface_modes |= ctx->interface_modes;
146 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
147 }
148
149 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
150
151 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
152 hw->wiphy->iface_combinations =
153 iwlagn_iface_combinations_dualmode;
154 hw->wiphy->n_iface_combinations =
155 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
156 }
157
158 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
159 WIPHY_FLAG_DISABLE_BEACON_HINTS |
160 WIPHY_FLAG_IBSS_RSN;
161
162 #ifdef CONFIG_PM_SLEEP
163 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
164 priv->trans->ops->d3_suspend &&
165 priv->trans->ops->d3_resume &&
166 device_can_wakeup(priv->trans->dev)) {
167 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
168 WIPHY_WOWLAN_DISCONNECT |
169 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
170 WIPHY_WOWLAN_RFKILL_RELEASE;
171 if (!iwlwifi_mod_params.sw_crypto)
172 priv->wowlan_support.flags |=
173 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
174 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
175
176 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
177 priv->wowlan_support.pattern_min_len =
178 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
179 priv->wowlan_support.pattern_max_len =
180 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
181 hw->wiphy->wowlan = &priv->wowlan_support;
182 }
183 #endif
184
185 if (iwlwifi_mod_params.power_save)
186 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
187 else
188 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
189
190 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
191 /* we create the 802.11 header and a max-length SSID element */
192 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
193
194 /*
195 * We don't use all queues: 4 and 9 are unused and any
196 * aggregation queue gets mapped down to the AC queue.
197 */
198 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
199
200 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
201
202 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
203 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
204 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
205 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
206 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
207 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
208
209 hw->wiphy->hw_version = priv->trans->hw_id;
210
211 iwl_leds_init(priv);
212
213 ret = ieee80211_register_hw(priv->hw);
214 if (ret) {
215 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
216 iwl_leds_exit(priv);
217 return ret;
218 }
219 priv->mac80211_registered = 1;
220
221 return 0;
222 }
223
224 void iwlagn_mac_unregister(struct iwl_priv *priv)
225 {
226 if (!priv->mac80211_registered)
227 return;
228 iwl_leds_exit(priv);
229 ieee80211_unregister_hw(priv->hw);
230 priv->mac80211_registered = 0;
231 }
232
233 static int __iwl_up(struct iwl_priv *priv)
234 {
235 struct iwl_rxon_context *ctx;
236 int ret;
237
238 lockdep_assert_held(&priv->mutex);
239
240 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
241 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
242 return -EIO;
243 }
244
245 for_each_context(priv, ctx) {
246 ret = iwlagn_alloc_bcast_station(priv, ctx);
247 if (ret) {
248 iwl_dealloc_bcast_stations(priv);
249 return ret;
250 }
251 }
252
253 ret = iwl_run_init_ucode(priv);
254 if (ret) {
255 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
256 goto error;
257 }
258
259 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
260 if (ret) {
261 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
262 goto error;
263 }
264
265 ret = iwl_alive_start(priv);
266 if (ret)
267 goto error;
268 return 0;
269
270 error:
271 set_bit(STATUS_EXIT_PENDING, &priv->status);
272 iwl_down(priv);
273 clear_bit(STATUS_EXIT_PENDING, &priv->status);
274
275 IWL_ERR(priv, "Unable to initialize device.\n");
276 return ret;
277 }
278
279 static int iwlagn_mac_start(struct ieee80211_hw *hw)
280 {
281 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
282 int ret;
283
284 IWL_DEBUG_MAC80211(priv, "enter\n");
285
286 /* we should be verifying the device is ready to be opened */
287 mutex_lock(&priv->mutex);
288 ret = __iwl_up(priv);
289 mutex_unlock(&priv->mutex);
290 if (ret)
291 return ret;
292
293 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
294
295 /* Now we should be done, and the READY bit should be set. */
296 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
297 ret = -EIO;
298
299 iwlagn_led_enable(priv);
300
301 priv->is_open = 1;
302 IWL_DEBUG_MAC80211(priv, "leave\n");
303 return 0;
304 }
305
306 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
307 {
308 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
309
310 IWL_DEBUG_MAC80211(priv, "enter\n");
311
312 if (!priv->is_open)
313 return;
314
315 priv->is_open = 0;
316
317 mutex_lock(&priv->mutex);
318 iwl_down(priv);
319 mutex_unlock(&priv->mutex);
320
321 iwl_cancel_deferred_work(priv);
322
323 flush_workqueue(priv->workqueue);
324
325 /* User space software may expect getting rfkill changes
326 * even if interface is down, trans->down will leave the RF
327 * kill interrupt enabled
328 */
329 iwl_trans_stop_hw(priv->trans, false);
330
331 IWL_DEBUG_MAC80211(priv, "leave\n");
332 }
333
334 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
335 struct ieee80211_vif *vif,
336 struct cfg80211_gtk_rekey_data *data)
337 {
338 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
339
340 if (iwlwifi_mod_params.sw_crypto)
341 return;
342
343 IWL_DEBUG_MAC80211(priv, "enter\n");
344 mutex_lock(&priv->mutex);
345
346 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
347 goto out;
348
349 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
350 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
351 priv->replay_ctr =
352 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
353 priv->have_rekey_data = true;
354
355 out:
356 mutex_unlock(&priv->mutex);
357 IWL_DEBUG_MAC80211(priv, "leave\n");
358 }
359
360 #ifdef CONFIG_PM_SLEEP
361
362 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
363 struct cfg80211_wowlan *wowlan)
364 {
365 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
366 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
367 int ret;
368
369 if (WARN_ON(!wowlan))
370 return -EINVAL;
371
372 IWL_DEBUG_MAC80211(priv, "enter\n");
373 mutex_lock(&priv->mutex);
374
375 /* Don't attempt WoWLAN when not associated, tear down instead. */
376 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
377 !iwl_is_associated_ctx(ctx)) {
378 ret = 1;
379 goto out;
380 }
381
382 ret = iwlagn_suspend(priv, wowlan);
383 if (ret)
384 goto error;
385
386 /* let the ucode operate on its own */
387 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
388 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
389
390 iwl_trans_d3_suspend(priv->trans, false);
391
392 goto out;
393
394 error:
395 priv->wowlan = false;
396 iwlagn_prepare_restart(priv);
397 ieee80211_restart_hw(priv->hw);
398 out:
399 mutex_unlock(&priv->mutex);
400 IWL_DEBUG_MAC80211(priv, "leave\n");
401
402 return ret;
403 }
404
405 struct iwl_resume_data {
406 struct iwl_priv *priv;
407 struct iwlagn_wowlan_status *cmd;
408 bool valid;
409 };
410
411 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
412 struct iwl_rx_packet *pkt, void *data)
413 {
414 struct iwl_resume_data *resume_data = data;
415 struct iwl_priv *priv = resume_data->priv;
416 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
417
418 if (len - 4 != sizeof(*resume_data->cmd)) {
419 IWL_ERR(priv, "rx wrong size data\n");
420 return true;
421 }
422 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
423 resume_data->valid = true;
424
425 return true;
426 }
427
428 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
429 {
430 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
431 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
432 struct ieee80211_vif *vif;
433 u32 base;
434 int ret;
435 enum iwl_d3_status d3_status;
436 struct error_table_start {
437 /* cf. struct iwl_error_event_table */
438 u32 valid;
439 u32 error_id;
440 } err_info;
441 struct iwl_notification_wait status_wait;
442 static const u8 status_cmd[] = {
443 REPLY_WOWLAN_GET_STATUS,
444 };
445 struct iwlagn_wowlan_status status_data = {};
446 struct iwl_resume_data resume_data = {
447 .priv = priv,
448 .cmd = &status_data,
449 .valid = false,
450 };
451 struct cfg80211_wowlan_wakeup wakeup = {
452 .pattern_idx = -1,
453 };
454 #ifdef CONFIG_IWLWIFI_DEBUGFS
455 const struct fw_img *img;
456 #endif
457
458 IWL_DEBUG_MAC80211(priv, "enter\n");
459 mutex_lock(&priv->mutex);
460
461 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
462 vif = ctx->vif;
463
464 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false);
465 if (ret)
466 goto out_unlock;
467
468 if (d3_status != IWL_D3_STATUS_ALIVE) {
469 IWL_INFO(priv, "Device was reset during suspend\n");
470 goto out_unlock;
471 }
472
473 /* uCode is no longer operating by itself */
474 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
475 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
476
477 base = priv->device_pointers.error_event_table;
478 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
479 IWL_WARN(priv, "Invalid error table during resume!\n");
480 goto out_unlock;
481 }
482
483 iwl_trans_read_mem_bytes(priv->trans, base,
484 &err_info, sizeof(err_info));
485
486 if (err_info.valid) {
487 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
488 err_info.valid, err_info.error_id);
489 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
490 wakeup.rfkill_release = true;
491 ieee80211_report_wowlan_wakeup(vif, &wakeup,
492 GFP_KERNEL);
493 }
494 goto out_unlock;
495 }
496
497 #ifdef CONFIG_IWLWIFI_DEBUGFS
498 img = &priv->fw->img[IWL_UCODE_WOWLAN];
499 if (!priv->wowlan_sram)
500 priv->wowlan_sram =
501 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
502 GFP_KERNEL);
503
504 if (priv->wowlan_sram)
505 iwl_trans_read_mem(priv->trans, 0x800000,
506 priv->wowlan_sram,
507 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
508 #endif
509
510 /*
511 * This is very strange. The GET_STATUS command is sent but the device
512 * doesn't reply properly, it seems it doesn't close the RBD so one is
513 * always left open ... As a result, we need to send another command
514 * and have to reset the driver afterwards. As we need to switch to
515 * runtime firmware again that'll happen.
516 */
517
518 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
519 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
520 &resume_data);
521
522 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
523 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
524 /* an RBD is left open in the firmware now! */
525
526 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
527 if (ret)
528 goto out_unlock;
529
530 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
531 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
532 struct cfg80211_wowlan_wakeup *wakeup_report;
533
534 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
535
536 if (reasons) {
537 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
538 wakeup.magic_pkt = true;
539 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
540 wakeup.pattern_idx = status_data.pattern_number;
541 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
542 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
543 wakeup.disconnect = true;
544 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
545 wakeup.gtk_rekey_failure = true;
546 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
547 wakeup.eap_identity_req = true;
548 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
549 wakeup.four_way_handshake = true;
550 wakeup_report = &wakeup;
551 } else {
552 wakeup_report = NULL;
553 }
554
555 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
556 }
557
558 priv->wowlan = false;
559
560 iwlagn_prepare_restart(priv);
561
562 memset((void *)&ctx->active, 0, sizeof(ctx->active));
563 iwl_connection_init_rx_config(priv, ctx);
564 iwlagn_set_rxon_chain(priv, ctx);
565
566 out_unlock:
567 mutex_unlock(&priv->mutex);
568 IWL_DEBUG_MAC80211(priv, "leave\n");
569
570 ieee80211_resume_disconnect(vif);
571
572 return 1;
573 }
574
575 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
576 {
577 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
578
579 device_set_wakeup_enable(priv->trans->dev, enabled);
580 }
581 #endif
582
583 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
584 struct ieee80211_tx_control *control,
585 struct sk_buff *skb)
586 {
587 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
588
589 if (iwlagn_tx_skb(priv, control->sta, skb))
590 ieee80211_free_txskb(hw, skb);
591 }
592
593 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
594 struct ieee80211_vif *vif,
595 struct ieee80211_key_conf *keyconf,
596 struct ieee80211_sta *sta,
597 u32 iv32, u16 *phase1key)
598 {
599 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
600
601 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
602 }
603
604 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
605 struct ieee80211_vif *vif,
606 struct ieee80211_sta *sta,
607 struct ieee80211_key_conf *key)
608 {
609 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
610 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
611 struct iwl_rxon_context *ctx = vif_priv->ctx;
612 int ret;
613 bool is_default_wep_key = false;
614
615 IWL_DEBUG_MAC80211(priv, "enter\n");
616
617 if (iwlwifi_mod_params.sw_crypto) {
618 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
619 return -EOPNOTSUPP;
620 }
621
622 switch (key->cipher) {
623 case WLAN_CIPHER_SUITE_TKIP:
624 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
625 /* fall through */
626 case WLAN_CIPHER_SUITE_CCMP:
627 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
628 break;
629 default:
630 break;
631 }
632
633 /*
634 * We could program these keys into the hardware as well, but we
635 * don't expect much multicast traffic in IBSS and having keys
636 * for more stations is probably more useful.
637 *
638 * Mark key TX-only and return 0.
639 */
640 if (vif->type == NL80211_IFTYPE_ADHOC &&
641 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
642 key->hw_key_idx = WEP_INVALID_OFFSET;
643 return 0;
644 }
645
646 /* If they key was TX-only, accept deletion */
647 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
648 return 0;
649
650 mutex_lock(&priv->mutex);
651 iwl_scan_cancel_timeout(priv, 100);
652
653 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
654
655 /*
656 * If we are getting WEP group key and we didn't receive any key mapping
657 * so far, we are in legacy wep mode (group key only), otherwise we are
658 * in 1X mode.
659 * In legacy wep mode, we use another host command to the uCode.
660 */
661 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
662 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
663 if (cmd == SET_KEY)
664 is_default_wep_key = !ctx->key_mapping_keys;
665 else
666 is_default_wep_key =
667 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
668 }
669
670
671 switch (cmd) {
672 case SET_KEY:
673 if (is_default_wep_key) {
674 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
675 break;
676 }
677 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
678 if (ret) {
679 /*
680 * can't add key for RX, but we don't need it
681 * in the device for TX so still return 0
682 */
683 ret = 0;
684 key->hw_key_idx = WEP_INVALID_OFFSET;
685 }
686
687 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
688 break;
689 case DISABLE_KEY:
690 if (is_default_wep_key)
691 ret = iwl_remove_default_wep_key(priv, ctx, key);
692 else
693 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
694
695 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
696 break;
697 default:
698 ret = -EINVAL;
699 }
700
701 mutex_unlock(&priv->mutex);
702 IWL_DEBUG_MAC80211(priv, "leave\n");
703
704 return ret;
705 }
706
707 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
708 {
709 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
710 return false;
711 return true;
712 }
713
714 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
715 {
716 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
717 return false;
718 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
719 return true;
720
721 /* disabled by default */
722 return false;
723 }
724
725 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
726 struct ieee80211_vif *vif,
727 enum ieee80211_ampdu_mlme_action action,
728 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
729 u8 buf_size)
730 {
731 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
732 int ret = -EINVAL;
733 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
734
735 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
736 sta->addr, tid);
737
738 if (!(priv->nvm_data->sku_cap_11n_enable))
739 return -EACCES;
740
741 IWL_DEBUG_MAC80211(priv, "enter\n");
742 mutex_lock(&priv->mutex);
743
744 switch (action) {
745 case IEEE80211_AMPDU_RX_START:
746 if (!iwl_enable_rx_ampdu(priv->cfg))
747 break;
748 IWL_DEBUG_HT(priv, "start Rx\n");
749 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
750 break;
751 case IEEE80211_AMPDU_RX_STOP:
752 IWL_DEBUG_HT(priv, "stop Rx\n");
753 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
754 break;
755 case IEEE80211_AMPDU_TX_START:
756 if (!priv->trans->ops->txq_enable)
757 break;
758 if (!iwl_enable_tx_ampdu(priv->cfg))
759 break;
760 IWL_DEBUG_HT(priv, "start Tx\n");
761 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
762 break;
763 case IEEE80211_AMPDU_TX_STOP_FLUSH:
764 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
765 IWL_DEBUG_HT(priv, "Flush Tx\n");
766 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
767 break;
768 case IEEE80211_AMPDU_TX_STOP_CONT:
769 IWL_DEBUG_HT(priv, "stop Tx\n");
770 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
771 if ((ret == 0) && (priv->agg_tids_count > 0)) {
772 priv->agg_tids_count--;
773 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
774 priv->agg_tids_count);
775 }
776 if (!priv->agg_tids_count &&
777 priv->hw_params.use_rts_for_aggregation) {
778 /*
779 * switch off RTS/CTS if it was previously enabled
780 */
781 sta_priv->lq_sta.lq.general_params.flags &=
782 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
783 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
784 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
785 }
786 break;
787 case IEEE80211_AMPDU_TX_OPERATIONAL:
788 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
789 break;
790 }
791 mutex_unlock(&priv->mutex);
792 IWL_DEBUG_MAC80211(priv, "leave\n");
793 return ret;
794 }
795
796 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
797 struct ieee80211_vif *vif,
798 struct ieee80211_sta *sta)
799 {
800 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
801 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
802 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
803 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
804 int ret;
805 u8 sta_id;
806
807 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
808 sta->addr);
809 sta_priv->sta_id = IWL_INVALID_STATION;
810
811 atomic_set(&sta_priv->pending_frames, 0);
812 if (vif->type == NL80211_IFTYPE_AP)
813 sta_priv->client = true;
814
815 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
816 is_ap, sta, &sta_id);
817 if (ret) {
818 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
819 sta->addr, ret);
820 /* Should we return success if return code is EEXIST ? */
821 return ret;
822 }
823
824 sta_priv->sta_id = sta_id;
825
826 return 0;
827 }
828
829 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
830 struct ieee80211_vif *vif,
831 struct ieee80211_sta *sta)
832 {
833 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
834 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
835 int ret;
836
837 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
838
839 if (vif->type == NL80211_IFTYPE_STATION) {
840 /*
841 * Station will be removed from device when the RXON
842 * is set to unassociated -- just deactivate it here
843 * to avoid re-programming it.
844 */
845 ret = 0;
846 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
847 } else {
848 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
849 if (ret)
850 IWL_DEBUG_QUIET_RFKILL(priv,
851 "Error removing station %pM\n", sta->addr);
852 }
853 return ret;
854 }
855
856 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
857 struct ieee80211_vif *vif,
858 struct ieee80211_sta *sta,
859 enum ieee80211_sta_state old_state,
860 enum ieee80211_sta_state new_state)
861 {
862 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
863 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
864 enum {
865 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
866 } op = NONE;
867 int ret;
868
869 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
870 sta->addr, old_state, new_state);
871
872 mutex_lock(&priv->mutex);
873 if (vif->type == NL80211_IFTYPE_STATION) {
874 if (old_state == IEEE80211_STA_NOTEXIST &&
875 new_state == IEEE80211_STA_NONE)
876 op = ADD;
877 else if (old_state == IEEE80211_STA_NONE &&
878 new_state == IEEE80211_STA_NOTEXIST)
879 op = REMOVE;
880 else if (old_state == IEEE80211_STA_AUTH &&
881 new_state == IEEE80211_STA_ASSOC)
882 op = HT_RATE_INIT;
883 } else {
884 if (old_state == IEEE80211_STA_AUTH &&
885 new_state == IEEE80211_STA_ASSOC)
886 op = ADD_RATE_INIT;
887 else if (old_state == IEEE80211_STA_ASSOC &&
888 new_state == IEEE80211_STA_AUTH)
889 op = REMOVE;
890 }
891
892 switch (op) {
893 case ADD:
894 ret = iwlagn_mac_sta_add(hw, vif, sta);
895 if (ret)
896 break;
897 /*
898 * Clear the in-progress flag, the AP station entry was added
899 * but we'll initialize LQ only when we've associated (which
900 * would also clear the in-progress flag). This is necessary
901 * in case we never initialize LQ because association fails.
902 */
903 spin_lock_bh(&priv->sta_lock);
904 priv->stations[iwl_sta_id(sta)].used &=
905 ~IWL_STA_UCODE_INPROGRESS;
906 spin_unlock_bh(&priv->sta_lock);
907 break;
908 case REMOVE:
909 ret = iwlagn_mac_sta_remove(hw, vif, sta);
910 break;
911 case ADD_RATE_INIT:
912 ret = iwlagn_mac_sta_add(hw, vif, sta);
913 if (ret)
914 break;
915 /* Initialize rate scaling */
916 IWL_DEBUG_INFO(priv,
917 "Initializing rate scaling for station %pM\n",
918 sta->addr);
919 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
920 ret = 0;
921 break;
922 case HT_RATE_INIT:
923 /* Initialize rate scaling */
924 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
925 if (ret)
926 break;
927 IWL_DEBUG_INFO(priv,
928 "Initializing rate scaling for station %pM\n",
929 sta->addr);
930 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
931 ret = 0;
932 break;
933 default:
934 ret = 0;
935 break;
936 }
937
938 /*
939 * mac80211 might WARN if we fail, but due the way we
940 * (badly) handle hard rfkill, we might fail here
941 */
942 if (iwl_is_rfkill(priv))
943 ret = 0;
944
945 mutex_unlock(&priv->mutex);
946 IWL_DEBUG_MAC80211(priv, "leave\n");
947
948 return ret;
949 }
950
951 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
952 struct ieee80211_channel_switch *ch_switch)
953 {
954 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
955 struct ieee80211_conf *conf = &hw->conf;
956 struct ieee80211_channel *channel = ch_switch->chandef.chan;
957 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
958 /*
959 * MULTI-FIXME
960 * When we add support for multiple interfaces, we need to
961 * revisit this. The channel switch command in the device
962 * only affects the BSS context, but what does that really
963 * mean? And what if we get a CSA on the second interface?
964 * This needs a lot of work.
965 */
966 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
967 u16 ch;
968
969 IWL_DEBUG_MAC80211(priv, "enter\n");
970
971 mutex_lock(&priv->mutex);
972
973 if (iwl_is_rfkill(priv))
974 goto out;
975
976 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
977 test_bit(STATUS_SCANNING, &priv->status) ||
978 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
979 goto out;
980
981 if (!iwl_is_associated_ctx(ctx))
982 goto out;
983
984 if (!priv->lib->set_channel_switch)
985 goto out;
986
987 ch = channel->hw_value;
988 if (le16_to_cpu(ctx->active.channel) == ch)
989 goto out;
990
991 priv->current_ht_config.smps = conf->smps_mode;
992
993 /* Configure HT40 channels */
994 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
995 case NL80211_CHAN_NO_HT:
996 case NL80211_CHAN_HT20:
997 ctx->ht.is_40mhz = false;
998 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
999 break;
1000 case NL80211_CHAN_HT40MINUS:
1001 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1002 ctx->ht.is_40mhz = true;
1003 break;
1004 case NL80211_CHAN_HT40PLUS:
1005 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1006 ctx->ht.is_40mhz = true;
1007 break;
1008 }
1009
1010 if ((le16_to_cpu(ctx->staging.channel) != ch))
1011 ctx->staging.flags = 0;
1012
1013 iwl_set_rxon_channel(priv, channel, ctx);
1014 iwl_set_rxon_ht(priv, ht_conf);
1015 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1016
1017 /*
1018 * at this point, staging_rxon has the
1019 * configuration for channel switch
1020 */
1021 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1022 priv->switch_channel = cpu_to_le16(ch);
1023 if (priv->lib->set_channel_switch(priv, ch_switch)) {
1024 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1025 priv->switch_channel = 0;
1026 ieee80211_chswitch_done(ctx->vif, false);
1027 }
1028
1029 out:
1030 mutex_unlock(&priv->mutex);
1031 IWL_DEBUG_MAC80211(priv, "leave\n");
1032 }
1033
1034 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1035 {
1036 /*
1037 * MULTI-FIXME
1038 * See iwlagn_mac_channel_switch.
1039 */
1040 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1041
1042 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1043 return;
1044
1045 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1046 return;
1047
1048 if (ctx->vif)
1049 ieee80211_chswitch_done(ctx->vif, is_success);
1050 }
1051
1052 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1053 unsigned int changed_flags,
1054 unsigned int *total_flags,
1055 u64 multicast)
1056 {
1057 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1058 __le32 filter_or = 0, filter_nand = 0;
1059 struct iwl_rxon_context *ctx;
1060
1061 #define CHK(test, flag) do { \
1062 if (*total_flags & (test)) \
1063 filter_or |= (flag); \
1064 else \
1065 filter_nand |= (flag); \
1066 } while (0)
1067
1068 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1069 changed_flags, *total_flags);
1070
1071 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1072 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1073 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1074 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1075
1076 #undef CHK
1077
1078 mutex_lock(&priv->mutex);
1079
1080 for_each_context(priv, ctx) {
1081 ctx->staging.filter_flags &= ~filter_nand;
1082 ctx->staging.filter_flags |= filter_or;
1083
1084 /*
1085 * Not committing directly because hardware can perform a scan,
1086 * but we'll eventually commit the filter flags change anyway.
1087 */
1088 }
1089
1090 mutex_unlock(&priv->mutex);
1091
1092 /*
1093 * Receiving all multicast frames is always enabled by the
1094 * default flags setup in iwl_connection_init_rx_config()
1095 * since we currently do not support programming multicast
1096 * filters into the device.
1097 */
1098 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1099 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1100 }
1101
1102 static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1103 {
1104 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1105
1106 mutex_lock(&priv->mutex);
1107 IWL_DEBUG_MAC80211(priv, "enter\n");
1108
1109 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1110 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1111 goto done;
1112 }
1113 if (iwl_is_rfkill(priv)) {
1114 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1115 goto done;
1116 }
1117
1118 /*
1119 * mac80211 will not push any more frames for transmit
1120 * until the flush is completed
1121 */
1122 if (drop) {
1123 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1124 if (iwlagn_txfifo_flush(priv, 0)) {
1125 IWL_ERR(priv, "flush request fail\n");
1126 goto done;
1127 }
1128 }
1129 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1130 iwl_trans_wait_tx_queue_empty(priv->trans);
1131 done:
1132 mutex_unlock(&priv->mutex);
1133 IWL_DEBUG_MAC80211(priv, "leave\n");
1134 }
1135
1136 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1137 struct ieee80211_vif *vif,
1138 enum ieee80211_rssi_event rssi_event)
1139 {
1140 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1141
1142 IWL_DEBUG_MAC80211(priv, "enter\n");
1143 mutex_lock(&priv->mutex);
1144
1145 if (priv->lib->bt_params &&
1146 priv->lib->bt_params->advanced_bt_coexist) {
1147 if (rssi_event == RSSI_EVENT_LOW)
1148 priv->bt_enable_pspoll = true;
1149 else if (rssi_event == RSSI_EVENT_HIGH)
1150 priv->bt_enable_pspoll = false;
1151
1152 iwlagn_send_advance_bt_config(priv);
1153 } else {
1154 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1155 "ignoring RSSI callback\n");
1156 }
1157
1158 mutex_unlock(&priv->mutex);
1159 IWL_DEBUG_MAC80211(priv, "leave\n");
1160 }
1161
1162 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1163 struct ieee80211_sta *sta, bool set)
1164 {
1165 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1166
1167 queue_work(priv->workqueue, &priv->beacon_update);
1168
1169 return 0;
1170 }
1171
1172 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1173 struct ieee80211_vif *vif, u16 queue,
1174 const struct ieee80211_tx_queue_params *params)
1175 {
1176 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1177 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1178 struct iwl_rxon_context *ctx = vif_priv->ctx;
1179 int q;
1180
1181 if (WARN_ON(!ctx))
1182 return -EINVAL;
1183
1184 IWL_DEBUG_MAC80211(priv, "enter\n");
1185
1186 if (!iwl_is_ready_rf(priv)) {
1187 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1188 return -EIO;
1189 }
1190
1191 if (queue >= AC_NUM) {
1192 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1193 return 0;
1194 }
1195
1196 q = AC_NUM - 1 - queue;
1197
1198 mutex_lock(&priv->mutex);
1199
1200 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1201 cpu_to_le16(params->cw_min);
1202 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1203 cpu_to_le16(params->cw_max);
1204 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1205 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1206 cpu_to_le16((params->txop * 32));
1207
1208 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1209
1210 mutex_unlock(&priv->mutex);
1211
1212 IWL_DEBUG_MAC80211(priv, "leave\n");
1213 return 0;
1214 }
1215
1216 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1217 {
1218 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1219
1220 return priv->ibss_manager == IWL_IBSS_MANAGER;
1221 }
1222
1223 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1224 {
1225 iwl_connection_init_rx_config(priv, ctx);
1226
1227 iwlagn_set_rxon_chain(priv, ctx);
1228
1229 return iwlagn_commit_rxon(priv, ctx);
1230 }
1231
1232 static int iwl_setup_interface(struct iwl_priv *priv,
1233 struct iwl_rxon_context *ctx)
1234 {
1235 struct ieee80211_vif *vif = ctx->vif;
1236 int err, ac;
1237
1238 lockdep_assert_held(&priv->mutex);
1239
1240 /*
1241 * This variable will be correct only when there's just
1242 * a single context, but all code using it is for hardware
1243 * that supports only one context.
1244 */
1245 priv->iw_mode = vif->type;
1246
1247 ctx->is_active = true;
1248
1249 err = iwl_set_mode(priv, ctx);
1250 if (err) {
1251 if (!ctx->always_active)
1252 ctx->is_active = false;
1253 return err;
1254 }
1255
1256 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1257 vif->type == NL80211_IFTYPE_ADHOC) {
1258 /*
1259 * pretend to have high BT traffic as long as we
1260 * are operating in IBSS mode, as this will cause
1261 * the rate scaling etc. to behave as intended.
1262 */
1263 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1264 }
1265
1266 /* set up queue mappings */
1267 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1268 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1269
1270 if (vif->type == NL80211_IFTYPE_AP)
1271 vif->cab_queue = ctx->mcast_queue;
1272 else
1273 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1274
1275 return 0;
1276 }
1277
1278 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1279 struct ieee80211_vif *vif)
1280 {
1281 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1282 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1283 struct iwl_rxon_context *tmp, *ctx = NULL;
1284 int err;
1285 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1286 bool reset = false;
1287
1288 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1289 viftype, vif->addr);
1290
1291 mutex_lock(&priv->mutex);
1292
1293 if (!iwl_is_ready_rf(priv)) {
1294 IWL_WARN(priv, "Try to add interface when device not ready\n");
1295 err = -EINVAL;
1296 goto out;
1297 }
1298
1299 for_each_context(priv, tmp) {
1300 u32 possible_modes =
1301 tmp->interface_modes | tmp->exclusive_interface_modes;
1302
1303 if (tmp->vif) {
1304 /* On reset we need to add the same interface again */
1305 if (tmp->vif == vif) {
1306 reset = true;
1307 ctx = tmp;
1308 break;
1309 }
1310
1311 /* check if this busy context is exclusive */
1312 if (tmp->exclusive_interface_modes &
1313 BIT(tmp->vif->type)) {
1314 err = -EINVAL;
1315 goto out;
1316 }
1317 continue;
1318 }
1319
1320 if (!(possible_modes & BIT(viftype)))
1321 continue;
1322
1323 /* have maybe usable context w/o interface */
1324 ctx = tmp;
1325 break;
1326 }
1327
1328 if (!ctx) {
1329 err = -EOPNOTSUPP;
1330 goto out;
1331 }
1332
1333 vif_priv->ctx = ctx;
1334 ctx->vif = vif;
1335
1336 /*
1337 * In SNIFFER device type, the firmware reports the FCS to
1338 * the host, rather than snipping it off. Unfortunately,
1339 * mac80211 doesn't (yet) provide a per-packet flag for
1340 * this, so that we have to set the hardware flag based
1341 * on the interfaces added. As the monitor interface can
1342 * only be present by itself, and will be removed before
1343 * other interfaces are added, this is safe.
1344 */
1345 if (vif->type == NL80211_IFTYPE_MONITOR)
1346 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1347 else
1348 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1349
1350 err = iwl_setup_interface(priv, ctx);
1351 if (!err || reset)
1352 goto out;
1353
1354 ctx->vif = NULL;
1355 priv->iw_mode = NL80211_IFTYPE_STATION;
1356 out:
1357 mutex_unlock(&priv->mutex);
1358
1359 IWL_DEBUG_MAC80211(priv, "leave\n");
1360 return err;
1361 }
1362
1363 static void iwl_teardown_interface(struct iwl_priv *priv,
1364 struct ieee80211_vif *vif,
1365 bool mode_change)
1366 {
1367 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1368
1369 lockdep_assert_held(&priv->mutex);
1370
1371 if (priv->scan_vif == vif) {
1372 iwl_scan_cancel_timeout(priv, 200);
1373 iwl_force_scan_end(priv);
1374 }
1375
1376 if (!mode_change) {
1377 iwl_set_mode(priv, ctx);
1378 if (!ctx->always_active)
1379 ctx->is_active = false;
1380 }
1381
1382 /*
1383 * When removing the IBSS interface, overwrite the
1384 * BT traffic load with the stored one from the last
1385 * notification, if any. If this is a device that
1386 * doesn't implement this, this has no effect since
1387 * both values are the same and zero.
1388 */
1389 if (vif->type == NL80211_IFTYPE_ADHOC)
1390 priv->bt_traffic_load = priv->last_bt_traffic_load;
1391 }
1392
1393 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1394 struct ieee80211_vif *vif)
1395 {
1396 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1397 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1398
1399 IWL_DEBUG_MAC80211(priv, "enter\n");
1400
1401 mutex_lock(&priv->mutex);
1402
1403 if (WARN_ON(ctx->vif != vif)) {
1404 struct iwl_rxon_context *tmp;
1405 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1406 for_each_context(priv, tmp)
1407 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1408 tmp->ctxid, tmp, tmp->vif);
1409 }
1410 ctx->vif = NULL;
1411
1412 iwl_teardown_interface(priv, vif, false);
1413
1414 mutex_unlock(&priv->mutex);
1415
1416 IWL_DEBUG_MAC80211(priv, "leave\n");
1417
1418 }
1419
1420 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1421 struct ieee80211_vif *vif,
1422 enum nl80211_iftype newtype, bool newp2p)
1423 {
1424 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1425 struct iwl_rxon_context *ctx, *tmp;
1426 enum nl80211_iftype newviftype = newtype;
1427 u32 interface_modes;
1428 int err;
1429
1430 IWL_DEBUG_MAC80211(priv, "enter\n");
1431
1432 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1433
1434 mutex_lock(&priv->mutex);
1435
1436 ctx = iwl_rxon_ctx_from_vif(vif);
1437
1438 /*
1439 * To simplify this code, only support changes on the
1440 * BSS context. The PAN context is usually reassigned
1441 * by creating/removing P2P interfaces anyway.
1442 */
1443 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1444 err = -EBUSY;
1445 goto out;
1446 }
1447
1448 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1449 /*
1450 * Huh? But wait ... this can maybe happen when
1451 * we're in the middle of a firmware restart!
1452 */
1453 err = -EBUSY;
1454 goto out;
1455 }
1456
1457 /* Check if the switch is supported in the same context */
1458 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1459 if (!(interface_modes & BIT(newtype))) {
1460 err = -EBUSY;
1461 goto out;
1462 }
1463
1464 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1465 for_each_context(priv, tmp) {
1466 if (ctx == tmp)
1467 continue;
1468
1469 if (!tmp->is_active)
1470 continue;
1471
1472 /*
1473 * The current mode switch would be exclusive, but
1474 * another context is active ... refuse the switch.
1475 */
1476 err = -EBUSY;
1477 goto out;
1478 }
1479 }
1480
1481 /* success */
1482 iwl_teardown_interface(priv, vif, true);
1483 vif->type = newviftype;
1484 vif->p2p = newp2p;
1485 err = iwl_setup_interface(priv, ctx);
1486 WARN_ON(err);
1487 /*
1488 * We've switched internally, but submitting to the
1489 * device may have failed for some reason. Mask this
1490 * error, because otherwise mac80211 will not switch
1491 * (and set the interface type back) and we'll be
1492 * out of sync with it.
1493 */
1494 err = 0;
1495
1496 out:
1497 mutex_unlock(&priv->mutex);
1498 IWL_DEBUG_MAC80211(priv, "leave\n");
1499
1500 return err;
1501 }
1502
1503 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1504 struct ieee80211_vif *vif,
1505 struct cfg80211_scan_request *req)
1506 {
1507 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1508 int ret;
1509
1510 IWL_DEBUG_MAC80211(priv, "enter\n");
1511
1512 if (req->n_channels == 0)
1513 return -EINVAL;
1514
1515 mutex_lock(&priv->mutex);
1516
1517 /*
1518 * If an internal scan is in progress, just set
1519 * up the scan_request as per above.
1520 */
1521 if (priv->scan_type != IWL_SCAN_NORMAL) {
1522 IWL_DEBUG_SCAN(priv,
1523 "SCAN request during internal scan - defer\n");
1524 priv->scan_request = req;
1525 priv->scan_vif = vif;
1526 ret = 0;
1527 } else {
1528 priv->scan_request = req;
1529 priv->scan_vif = vif;
1530 /*
1531 * mac80211 will only ask for one band at a time
1532 * so using channels[0] here is ok
1533 */
1534 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1535 req->channels[0]->band);
1536 if (ret) {
1537 priv->scan_request = NULL;
1538 priv->scan_vif = NULL;
1539 }
1540 }
1541
1542 IWL_DEBUG_MAC80211(priv, "leave\n");
1543
1544 mutex_unlock(&priv->mutex);
1545
1546 return ret;
1547 }
1548
1549 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1550 {
1551 struct iwl_addsta_cmd cmd = {
1552 .mode = STA_CONTROL_MODIFY_MSK,
1553 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1554 .sta.sta_id = sta_id,
1555 };
1556
1557 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1558 }
1559
1560 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1561 struct ieee80211_vif *vif,
1562 enum sta_notify_cmd cmd,
1563 struct ieee80211_sta *sta)
1564 {
1565 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1566 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1567 int sta_id;
1568
1569 IWL_DEBUG_MAC80211(priv, "enter\n");
1570
1571 switch (cmd) {
1572 case STA_NOTIFY_SLEEP:
1573 WARN_ON(!sta_priv->client);
1574 sta_priv->asleep = true;
1575 if (atomic_read(&sta_priv->pending_frames) > 0)
1576 ieee80211_sta_block_awake(hw, sta, true);
1577 break;
1578 case STA_NOTIFY_AWAKE:
1579 WARN_ON(!sta_priv->client);
1580 if (!sta_priv->asleep)
1581 break;
1582 sta_priv->asleep = false;
1583 sta_id = iwl_sta_id(sta);
1584 if (sta_id != IWL_INVALID_STATION)
1585 iwl_sta_modify_ps_wake(priv, sta_id);
1586 break;
1587 default:
1588 break;
1589 }
1590 IWL_DEBUG_MAC80211(priv, "leave\n");
1591 }
1592
1593 struct ieee80211_ops iwlagn_hw_ops = {
1594 .tx = iwlagn_mac_tx,
1595 .start = iwlagn_mac_start,
1596 .stop = iwlagn_mac_stop,
1597 #ifdef CONFIG_PM_SLEEP
1598 .suspend = iwlagn_mac_suspend,
1599 .resume = iwlagn_mac_resume,
1600 .set_wakeup = iwlagn_mac_set_wakeup,
1601 #endif
1602 .add_interface = iwlagn_mac_add_interface,
1603 .remove_interface = iwlagn_mac_remove_interface,
1604 .change_interface = iwlagn_mac_change_interface,
1605 .config = iwlagn_mac_config,
1606 .configure_filter = iwlagn_configure_filter,
1607 .set_key = iwlagn_mac_set_key,
1608 .update_tkip_key = iwlagn_mac_update_tkip_key,
1609 .set_rekey_data = iwlagn_mac_set_rekey_data,
1610 .conf_tx = iwlagn_mac_conf_tx,
1611 .bss_info_changed = iwlagn_bss_info_changed,
1612 .ampdu_action = iwlagn_mac_ampdu_action,
1613 .hw_scan = iwlagn_mac_hw_scan,
1614 .sta_notify = iwlagn_mac_sta_notify,
1615 .sta_state = iwlagn_mac_sta_state,
1616 .channel_switch = iwlagn_mac_channel_switch,
1617 .flush = iwlagn_mac_flush,
1618 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1619 .rssi_callback = iwlagn_mac_rssi_callback,
1620 .set_tim = iwlagn_mac_set_tim,
1621 };
1622
1623 /* This function both allocates and initializes hw and priv. */
1624 struct ieee80211_hw *iwl_alloc_all(void)
1625 {
1626 struct iwl_priv *priv;
1627 struct iwl_op_mode *op_mode;
1628 /* mac80211 allocates memory for this device instance, including
1629 * space for this driver's private structure */
1630 struct ieee80211_hw *hw;
1631
1632 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1633 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1634 if (!hw)
1635 goto out;
1636
1637 op_mode = hw->priv;
1638 priv = IWL_OP_MODE_GET_DVM(op_mode);
1639 priv->hw = hw;
1640
1641 out:
1642 return hw;
1643 }
Linux with added FPC-III support