projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
iwlwifi: change struct iwl_fw
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-mac80211.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2012 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/mac80211.h>
42
43 #include <asm/div64.h>
44
45 #include "iwl-eeprom.h"
46 #include "iwl-dev.h"
47 #include "iwl-core.h"
48 #include "iwl-io.h"
49 #include "iwl-agn-calib.h"
50 #include "iwl-agn.h"
51 #include "iwl-shared.h"
52 #include "iwl-trans.h"
53 #include "iwl-op-mode.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_PERIOD |
149 IEEE80211_HW_SPECTRUM_MGMT |
150 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
151
152 /*
153 * Including the following line will crash some AP's. This
154 * workaround removes the stimulus which causes the crash until
155 * the AP software can be fixed.
156 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
157 */
158
159 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
160 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
161
162 if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
163 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
164 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
165
166 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
167 /* enable 11w if the uCode advertise */
168 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
169 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
170 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
171
172 hw->sta_data_size = sizeof(struct iwl_station_priv);
173 hw->vif_data_size = sizeof(struct iwl_vif_priv);
174
175 for_each_context(priv, ctx) {
176 hw->wiphy->interface_modes |= ctx->interface_modes;
177 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
178 }
179
180 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
181
182 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
183 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
184 hw->wiphy->n_iface_combinations =
185 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
186 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
187 hw->wiphy->iface_combinations =
188 iwlagn_iface_combinations_dualmode;
189 hw->wiphy->n_iface_combinations =
190 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
191 }
192
193 hw->wiphy->max_remain_on_channel_duration = 1000;
194
195 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
196 WIPHY_FLAG_DISABLE_BEACON_HINTS |
197 WIPHY_FLAG_IBSS_RSN;
198
199 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
200 trans(priv)->ops->wowlan_suspend &&
201 device_can_wakeup(trans(priv)->dev)) {
202 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
203 WIPHY_WOWLAN_DISCONNECT |
204 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
205 WIPHY_WOWLAN_RFKILL_RELEASE;
206 if (!iwlagn_mod_params.sw_crypto)
207 hw->wiphy->wowlan.flags |=
208 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
209 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
210
211 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
212 hw->wiphy->wowlan.pattern_min_len =
213 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
214 hw->wiphy->wowlan.pattern_max_len =
215 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
216 }
217
218 if (iwlagn_mod_params.power_save)
219 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
220 else
221 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
222
223 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
224 /* we create the 802.11 header and a zero-length SSID element */
225 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
226
227 /* Default value; 4 EDCA QOS priorities */
228 hw->queues = 4;
229
230 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
231
232 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
233 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
234 &priv->bands[IEEE80211_BAND_2GHZ];
235 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
236 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
237 &priv->bands[IEEE80211_BAND_5GHZ];
238
239 hw->wiphy->hw_version = trans(priv)->hw_id;
240
241 iwl_leds_init(priv);
242
243 ret = ieee80211_register_hw(priv->hw);
244 if (ret) {
245 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
246 return ret;
247 }
248 priv->mac80211_registered = 1;
249
250 return 0;
251 }
252
253 void iwlagn_mac_unregister(struct iwl_priv *priv)
254 {
255 if (!priv->mac80211_registered)
256 return;
257 iwl_leds_exit(priv);
258 ieee80211_unregister_hw(priv->hw);
259 priv->mac80211_registered = 0;
260 }
261
262 static int __iwl_up(struct iwl_priv *priv)
263 {
264 struct iwl_rxon_context *ctx;
265 int ret;
266
267 lockdep_assert_held(&priv->mutex);
268
269 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
270 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
271 return -EIO;
272 }
273
274 for_each_context(priv, ctx) {
275 ret = iwlagn_alloc_bcast_station(priv, ctx);
276 if (ret) {
277 iwl_dealloc_bcast_stations(priv);
278 return ret;
279 }
280 }
281
282 ret = iwl_run_init_ucode(priv);
283 if (ret) {
284 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
285 goto error;
286 }
287
288 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
289 if (ret) {
290 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
291 goto error;
292 }
293
294 ret = iwl_alive_start(priv);
295 if (ret)
296 goto error;
297 return 0;
298
299 error:
300 set_bit(STATUS_EXIT_PENDING, &priv->status);
301 iwl_down(priv);
302 clear_bit(STATUS_EXIT_PENDING, &priv->status);
303
304 IWL_ERR(priv, "Unable to initialize device.\n");
305 return ret;
306 }
307
308 static int iwlagn_mac_start(struct ieee80211_hw *hw)
309 {
310 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
311 int ret;
312
313 IWL_DEBUG_MAC80211(priv, "enter\n");
314
315 /* we should be verifying the device is ready to be opened */
316 mutex_lock(&priv->mutex);
317 ret = __iwl_up(priv);
318 mutex_unlock(&priv->mutex);
319 if (ret)
320 return ret;
321
322 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
323
324 /* Now we should be done, and the READY bit should be set. */
325 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
326 ret = -EIO;
327
328 iwlagn_led_enable(priv);
329
330 priv->is_open = 1;
331 IWL_DEBUG_MAC80211(priv, "leave\n");
332 return 0;
333 }
334
335 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
336 {
337 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
338
339 IWL_DEBUG_MAC80211(priv, "enter\n");
340
341 if (!priv->is_open)
342 return;
343
344 priv->is_open = 0;
345
346 mutex_lock(&priv->mutex);
347 iwl_down(priv);
348 mutex_unlock(&priv->mutex);
349
350 iwl_cancel_deferred_work(priv);
351
352 flush_workqueue(priv->workqueue);
353
354 /* User space software may expect getting rfkill changes
355 * even if interface is down, trans->down will leave the RF
356 * kill interrupt enabled
357 */
358 iwl_trans_stop_hw(trans(priv));
359
360 IWL_DEBUG_MAC80211(priv, "leave\n");
361 }
362
363 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
364 struct ieee80211_vif *vif,
365 struct cfg80211_gtk_rekey_data *data)
366 {
367 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
368
369 if (iwlagn_mod_params.sw_crypto)
370 return;
371
372 IWL_DEBUG_MAC80211(priv, "enter\n");
373 mutex_lock(&priv->mutex);
374
375 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
376 goto out;
377
378 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
379 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
380 priv->replay_ctr =
381 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
382 priv->have_rekey_data = true;
383
384 out:
385 mutex_unlock(&priv->mutex);
386 IWL_DEBUG_MAC80211(priv, "leave\n");
387 }
388
389 #ifdef CONFIG_PM_SLEEP
390
391 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
392 struct cfg80211_wowlan *wowlan)
393 {
394 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
395 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
396 int ret;
397
398 if (WARN_ON(!wowlan))
399 return -EINVAL;
400
401 IWL_DEBUG_MAC80211(priv, "enter\n");
402 mutex_lock(&priv->mutex);
403
404 /* Don't attempt WoWLAN when not associated, tear down instead. */
405 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
406 !iwl_is_associated_ctx(ctx)) {
407 ret = 1;
408 goto out;
409 }
410
411 ret = iwlagn_suspend(priv, wowlan);
412 if (ret)
413 goto error;
414
415 device_set_wakeup_enable(trans(priv)->dev, true);
416
417 iwl_trans_wowlan_suspend(trans(priv));
418
419 goto out;
420
421 error:
422 priv->wowlan = false;
423 iwlagn_prepare_restart(priv);
424 ieee80211_restart_hw(priv->hw);
425 out:
426 mutex_unlock(&priv->mutex);
427 IWL_DEBUG_MAC80211(priv, "leave\n");
428
429 return ret;
430 }
431
432 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
433 {
434 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
435 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
436 struct ieee80211_vif *vif;
437 unsigned long flags;
438 u32 base, status = 0xffffffff;
439 int ret = -EIO;
440 const struct fw_img *img;
441
442 IWL_DEBUG_MAC80211(priv, "enter\n");
443 mutex_lock(&priv->mutex);
444
445 iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
446 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
447
448 base = priv->shrd->device_pointers.error_event_table;
449 if (iwlagn_hw_valid_rtc_data_addr(base)) {
450 spin_lock_irqsave(&trans(priv)->reg_lock, flags);
451 ret = iwl_grab_nic_access_silent(trans(priv));
452 if (likely(ret == 0)) {
453 iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, base);
454 status = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
455 iwl_release_nic_access(trans(priv));
456 }
457 spin_unlock_irqrestore(&trans(priv)->reg_lock, flags);
458
459 #ifdef CONFIG_IWLWIFI_DEBUGFS
460 if (ret == 0) {
461 img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
462 if (!priv->wowlan_sram) {
463 priv->wowlan_sram =
464 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
465 GFP_KERNEL);
466 }
467
468 if (priv->wowlan_sram)
469 _iwl_read_targ_mem_words(
470 trans(priv), 0x800000,
471 priv->wowlan_sram,
472 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
473 }
474 #endif
475 }
476
477 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
478 vif = ctx->vif;
479
480 priv->wowlan = false;
481
482 device_set_wakeup_enable(trans(priv)->dev, false);
483
484 iwlagn_prepare_restart(priv);
485
486 memset((void *)&ctx->active, 0, sizeof(ctx->active));
487 iwl_connection_init_rx_config(priv, ctx);
488 iwlagn_set_rxon_chain(priv, ctx);
489
490 mutex_unlock(&priv->mutex);
491 IWL_DEBUG_MAC80211(priv, "leave\n");
492
493 ieee80211_resume_disconnect(vif);
494
495 return 1;
496 }
497
498 #endif
499
500 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
501 {
502 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
503
504 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
505 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
506
507 if (iwlagn_tx_skb(priv, skb))
508 dev_kfree_skb_any(skb);
509 }
510
511 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
512 struct ieee80211_vif *vif,
513 struct ieee80211_key_conf *keyconf,
514 struct ieee80211_sta *sta,
515 u32 iv32, u16 *phase1key)
516 {
517 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
518
519 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
520 }
521
522 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
523 struct ieee80211_vif *vif,
524 struct ieee80211_sta *sta,
525 struct ieee80211_key_conf *key)
526 {
527 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
528 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
529 struct iwl_rxon_context *ctx = vif_priv->ctx;
530 int ret;
531 bool is_default_wep_key = false;
532
533 IWL_DEBUG_MAC80211(priv, "enter\n");
534
535 if (iwlagn_mod_params.sw_crypto) {
536 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
537 return -EOPNOTSUPP;
538 }
539
540 switch (key->cipher) {
541 case WLAN_CIPHER_SUITE_TKIP:
542 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
543 /* fall through */
544 case WLAN_CIPHER_SUITE_CCMP:
545 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
546 break;
547 default:
548 break;
549 }
550
551 /*
552 * We could program these keys into the hardware as well, but we
553 * don't expect much multicast traffic in IBSS and having keys
554 * for more stations is probably more useful.
555 *
556 * Mark key TX-only and return 0.
557 */
558 if (vif->type == NL80211_IFTYPE_ADHOC &&
559 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
560 key->hw_key_idx = WEP_INVALID_OFFSET;
561 return 0;
562 }
563
564 /* If they key was TX-only, accept deletion */
565 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
566 return 0;
567
568 mutex_lock(&priv->mutex);
569 iwl_scan_cancel_timeout(priv, 100);
570
571 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
572
573 /*
574 * If we are getting WEP group key and we didn't receive any key mapping
575 * so far, we are in legacy wep mode (group key only), otherwise we are
576 * in 1X mode.
577 * In legacy wep mode, we use another host command to the uCode.
578 */
579 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
580 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
581 if (cmd == SET_KEY)
582 is_default_wep_key = !ctx->key_mapping_keys;
583 else
584 is_default_wep_key =
585 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
586 }
587
588
589 switch (cmd) {
590 case SET_KEY:
591 if (is_default_wep_key) {
592 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
593 break;
594 }
595 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
596 if (ret) {
597 /*
598 * can't add key for RX, but we don't need it
599 * in the device for TX so still return 0
600 */
601 ret = 0;
602 key->hw_key_idx = WEP_INVALID_OFFSET;
603 }
604
605 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
606 break;
607 case DISABLE_KEY:
608 if (is_default_wep_key)
609 ret = iwl_remove_default_wep_key(priv, ctx, key);
610 else
611 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
612
613 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
614 break;
615 default:
616 ret = -EINVAL;
617 }
618
619 mutex_unlock(&priv->mutex);
620 IWL_DEBUG_MAC80211(priv, "leave\n");
621
622 return ret;
623 }
624
625 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
626 struct ieee80211_vif *vif,
627 enum ieee80211_ampdu_mlme_action action,
628 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
629 u8 buf_size)
630 {
631 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
632 int ret = -EINVAL;
633 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
634
635 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
636 sta->addr, tid);
637
638 if (!(hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE))
639 return -EACCES;
640
641 IWL_DEBUG_MAC80211(priv, "enter\n");
642 mutex_lock(&priv->mutex);
643
644 switch (action) {
645 case IEEE80211_AMPDU_RX_START:
646 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
647 break;
648 IWL_DEBUG_HT(priv, "start Rx\n");
649 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
650 break;
651 case IEEE80211_AMPDU_RX_STOP:
652 IWL_DEBUG_HT(priv, "stop Rx\n");
653 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
654 break;
655 case IEEE80211_AMPDU_TX_START:
656 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
657 break;
658 IWL_DEBUG_HT(priv, "start Tx\n");
659 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
660 break;
661 case IEEE80211_AMPDU_TX_STOP:
662 IWL_DEBUG_HT(priv, "stop Tx\n");
663 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
664 if ((ret == 0) && (priv->agg_tids_count > 0)) {
665 priv->agg_tids_count--;
666 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
667 priv->agg_tids_count);
668 }
669 if (!priv->agg_tids_count &&
670 hw_params(priv).use_rts_for_aggregation) {
671 /*
672 * switch off RTS/CTS if it was previously enabled
673 */
674 sta_priv->lq_sta.lq.general_params.flags &=
675 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
676 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
677 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
678 }
679 break;
680 case IEEE80211_AMPDU_TX_OPERATIONAL:
681 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
682 break;
683 }
684 mutex_unlock(&priv->mutex);
685 IWL_DEBUG_MAC80211(priv, "leave\n");
686 return ret;
687 }
688
689 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
690 struct ieee80211_vif *vif,
691 struct ieee80211_sta *sta)
692 {
693 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
694 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
695 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
696 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
697 int ret;
698 u8 sta_id;
699
700 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
701 sta->addr);
702 sta_priv->sta_id = IWL_INVALID_STATION;
703
704 atomic_set(&sta_priv->pending_frames, 0);
705 if (vif->type == NL80211_IFTYPE_AP)
706 sta_priv->client = true;
707
708 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
709 is_ap, sta, &sta_id);
710 if (ret) {
711 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
712 sta->addr, ret);
713 /* Should we return success if return code is EEXIST ? */
714 return ret;
715 }
716
717 sta_priv->sta_id = sta_id;
718
719 return 0;
720 }
721
722 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
723 struct ieee80211_vif *vif,
724 struct ieee80211_sta *sta)
725 {
726 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
727 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
728 int ret;
729
730 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
731
732 if (vif->type == NL80211_IFTYPE_STATION) {
733 /*
734 * Station will be removed from device when the RXON
735 * is set to unassociated -- just deactivate it here
736 * to avoid re-programming it.
737 */
738 ret = 0;
739 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
740 } else {
741 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
742 if (ret)
743 IWL_DEBUG_QUIET_RFKILL(priv,
744 "Error removing station %pM\n", sta->addr);
745 }
746 return ret;
747 }
748
749 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
750 struct ieee80211_vif *vif,
751 struct ieee80211_sta *sta,
752 enum ieee80211_sta_state old_state,
753 enum ieee80211_sta_state new_state)
754 {
755 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
756 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
757 enum {
758 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
759 } op = NONE;
760 int ret;
761
762 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
763 sta->addr, old_state, new_state);
764
765 mutex_lock(&priv->mutex);
766 if (vif->type == NL80211_IFTYPE_STATION) {
767 if (old_state == IEEE80211_STA_NOTEXIST &&
768 new_state == IEEE80211_STA_NONE)
769 op = ADD;
770 else if (old_state == IEEE80211_STA_NONE &&
771 new_state == IEEE80211_STA_NOTEXIST)
772 op = REMOVE;
773 else if (old_state == IEEE80211_STA_AUTH &&
774 new_state == IEEE80211_STA_ASSOC)
775 op = HT_RATE_INIT;
776 } else {
777 if (old_state == IEEE80211_STA_AUTH &&
778 new_state == IEEE80211_STA_ASSOC)
779 op = ADD_RATE_INIT;
780 else if (old_state == IEEE80211_STA_ASSOC &&
781 new_state == IEEE80211_STA_AUTH)
782 op = REMOVE;
783 }
784
785 switch (op) {
786 case ADD:
787 ret = iwlagn_mac_sta_add(hw, vif, sta);
788 break;
789 case REMOVE:
790 ret = iwlagn_mac_sta_remove(hw, vif, sta);
791 break;
792 case ADD_RATE_INIT:
793 ret = iwlagn_mac_sta_add(hw, vif, sta);
794 if (ret)
795 break;
796 /* Initialize rate scaling */
797 IWL_DEBUG_INFO(priv,
798 "Initializing rate scaling for station %pM\n",
799 sta->addr);
800 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
801 ret = 0;
802 break;
803 case HT_RATE_INIT:
804 /* Initialize rate scaling */
805 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
806 if (ret)
807 break;
808 IWL_DEBUG_INFO(priv,
809 "Initializing rate scaling for station %pM\n",
810 sta->addr);
811 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
812 ret = 0;
813 break;
814 default:
815 ret = 0;
816 break;
817 }
818
819 /*
820 * mac80211 might WARN if we fail, but due the way we
821 * (badly) handle hard rfkill, we might fail here
822 */
823 if (iwl_is_rfkill(priv))
824 ret = 0;
825
826 mutex_unlock(&priv->mutex);
827 IWL_DEBUG_MAC80211(priv, "leave\n");
828
829 return ret;
830 }
831
832 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
833 struct ieee80211_channel_switch *ch_switch)
834 {
835 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
836 const struct iwl_channel_info *ch_info;
837 struct ieee80211_conf *conf = &hw->conf;
838 struct ieee80211_channel *channel = ch_switch->channel;
839 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
840 /*
841 * MULTI-FIXME
842 * When we add support for multiple interfaces, we need to
843 * revisit this. The channel switch command in the device
844 * only affects the BSS context, but what does that really
845 * mean? And what if we get a CSA on the second interface?
846 * This needs a lot of work.
847 */
848 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
849 u16 ch;
850
851 IWL_DEBUG_MAC80211(priv, "enter\n");
852
853 mutex_lock(&priv->mutex);
854
855 if (iwl_is_rfkill(priv))
856 goto out;
857
858 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
859 test_bit(STATUS_SCANNING, &priv->status) ||
860 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
861 goto out;
862
863 if (!iwl_is_associated_ctx(ctx))
864 goto out;
865
866 if (!cfg(priv)->lib->set_channel_switch)
867 goto out;
868
869 ch = channel->hw_value;
870 if (le16_to_cpu(ctx->active.channel) == ch)
871 goto out;
872
873 ch_info = iwl_get_channel_info(priv, channel->band, ch);
874 if (!is_channel_valid(ch_info)) {
875 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
876 goto out;
877 }
878
879 priv->current_ht_config.smps = conf->smps_mode;
880
881 /* Configure HT40 channels */
882 ctx->ht.enabled = conf_is_ht(conf);
883 if (ctx->ht.enabled)
884 iwlagn_config_ht40(conf, ctx);
885 else
886 ctx->ht.is_40mhz = false;
887
888 if ((le16_to_cpu(ctx->staging.channel) != ch))
889 ctx->staging.flags = 0;
890
891 iwl_set_rxon_channel(priv, channel, ctx);
892 iwl_set_rxon_ht(priv, ht_conf);
893 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
894
895 iwl_set_rate(priv);
896 /*
897 * at this point, staging_rxon has the
898 * configuration for channel switch
899 */
900 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
901 priv->switch_channel = cpu_to_le16(ch);
902 if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
903 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
904 priv->switch_channel = 0;
905 ieee80211_chswitch_done(ctx->vif, false);
906 }
907
908 out:
909 mutex_unlock(&priv->mutex);
910 IWL_DEBUG_MAC80211(priv, "leave\n");
911 }
912
913 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
914 unsigned int changed_flags,
915 unsigned int *total_flags,
916 u64 multicast)
917 {
918 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
919 __le32 filter_or = 0, filter_nand = 0;
920 struct iwl_rxon_context *ctx;
921
922 #define CHK(test, flag) do { \
923 if (*total_flags & (test)) \
924 filter_or |= (flag); \
925 else \
926 filter_nand |= (flag); \
927 } while (0)
928
929 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
930 changed_flags, *total_flags);
931
932 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
933 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
934 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
935 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
936
937 #undef CHK
938
939 mutex_lock(&priv->mutex);
940
941 for_each_context(priv, ctx) {
942 ctx->staging.filter_flags &= ~filter_nand;
943 ctx->staging.filter_flags |= filter_or;
944
945 /*
946 * Not committing directly because hardware can perform a scan,
947 * but we'll eventually commit the filter flags change anyway.
948 */
949 }
950
951 mutex_unlock(&priv->mutex);
952
953 /*
954 * Receiving all multicast frames is always enabled by the
955 * default flags setup in iwl_connection_init_rx_config()
956 * since we currently do not support programming multicast
957 * filters into the device.
958 */
959 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
960 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
961 }
962
963 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
964 {
965 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
966
967 mutex_lock(&priv->mutex);
968 IWL_DEBUG_MAC80211(priv, "enter\n");
969
970 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
971 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
972 goto done;
973 }
974 if (iwl_is_rfkill(priv)) {
975 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
976 goto done;
977 }
978
979 /*
980 * mac80211 will not push any more frames for transmit
981 * until the flush is completed
982 */
983 if (drop) {
984 IWL_DEBUG_MAC80211(priv, "send flush command\n");
985 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
986 IWL_ERR(priv, "flush request fail\n");
987 goto done;
988 }
989 }
990 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
991 iwl_trans_wait_tx_queue_empty(trans(priv));
992 done:
993 mutex_unlock(&priv->mutex);
994 IWL_DEBUG_MAC80211(priv, "leave\n");
995 }
996
997 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
998 struct ieee80211_channel *channel,
999 enum nl80211_channel_type channel_type,
1000 int duration)
1001 {
1002 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1003 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1004 int err = 0;
1005
1006 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1007 return -EOPNOTSUPP;
1008
1009 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1010 return -EOPNOTSUPP;
1011
1012 IWL_DEBUG_MAC80211(priv, "enter\n");
1013 mutex_lock(&priv->mutex);
1014
1015 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1016 err = -EBUSY;
1017 goto out;
1018 }
1019
1020 priv->hw_roc_channel = channel;
1021 priv->hw_roc_chantype = channel_type;
1022 /* convert from ms to TU */
1023 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1024 priv->hw_roc_start_notified = false;
1025 cancel_delayed_work(&priv->hw_roc_disable_work);
1026
1027 if (!ctx->is_active) {
1028 static const struct iwl_qos_info default_qos_data = {
1029 .def_qos_parm = {
1030 .ac[0] = {
1031 .cw_min = cpu_to_le16(3),
1032 .cw_max = cpu_to_le16(7),
1033 .aifsn = 2,
1034 .edca_txop = cpu_to_le16(1504),
1035 },
1036 .ac[1] = {
1037 .cw_min = cpu_to_le16(7),
1038 .cw_max = cpu_to_le16(15),
1039 .aifsn = 2,
1040 .edca_txop = cpu_to_le16(3008),
1041 },
1042 .ac[2] = {
1043 .cw_min = cpu_to_le16(15),
1044 .cw_max = cpu_to_le16(1023),
1045 .aifsn = 3,
1046 },
1047 .ac[3] = {
1048 .cw_min = cpu_to_le16(15),
1049 .cw_max = cpu_to_le16(1023),
1050 .aifsn = 7,
1051 },
1052 },
1053 };
1054
1055 ctx->is_active = true;
1056 ctx->qos_data = default_qos_data;
1057 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1058 memcpy(ctx->staging.node_addr,
1059 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1060 ETH_ALEN);
1061 memcpy(ctx->staging.bssid_addr,
1062 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1063 ETH_ALEN);
1064 err = iwlagn_commit_rxon(priv, ctx);
1065 if (err)
1066 goto out;
1067 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1068 RXON_FILTER_PROMISC_MSK |
1069 RXON_FILTER_CTL2HOST_MSK;
1070
1071 err = iwlagn_commit_rxon(priv, ctx);
1072 if (err) {
1073 iwlagn_disable_roc(priv);
1074 goto out;
1075 }
1076 priv->hw_roc_setup = true;
1077 }
1078
1079 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1080 if (err)
1081 iwlagn_disable_roc(priv);
1082
1083 out:
1084 mutex_unlock(&priv->mutex);
1085 IWL_DEBUG_MAC80211(priv, "leave\n");
1086
1087 return err;
1088 }
1089
1090 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1091 {
1092 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1093
1094 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1095 return -EOPNOTSUPP;
1096
1097 IWL_DEBUG_MAC80211(priv, "enter\n");
1098 mutex_lock(&priv->mutex);
1099 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1100 iwlagn_disable_roc(priv);
1101 mutex_unlock(&priv->mutex);
1102 IWL_DEBUG_MAC80211(priv, "leave\n");
1103
1104 return 0;
1105 }
1106
1107 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1108 enum ieee80211_rssi_event rssi_event)
1109 {
1110 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1111
1112 IWL_DEBUG_MAC80211(priv, "enter\n");
1113 mutex_lock(&priv->mutex);
1114
1115 if (cfg(priv)->bt_params &&
1116 cfg(priv)->bt_params->advanced_bt_coexist) {
1117 if (rssi_event == RSSI_EVENT_LOW)
1118 priv->bt_enable_pspoll = true;
1119 else if (rssi_event == RSSI_EVENT_HIGH)
1120 priv->bt_enable_pspoll = false;
1121
1122 iwlagn_send_advance_bt_config(priv);
1123 } else {
1124 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1125 "ignoring RSSI callback\n");
1126 }
1127
1128 mutex_unlock(&priv->mutex);
1129 IWL_DEBUG_MAC80211(priv, "leave\n");
1130 }
1131
1132 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1133 struct ieee80211_sta *sta, bool set)
1134 {
1135 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1136
1137 queue_work(priv->workqueue, &priv->beacon_update);
1138
1139 return 0;
1140 }
1141
1142 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1143 struct ieee80211_vif *vif, u16 queue,
1144 const struct ieee80211_tx_queue_params *params)
1145 {
1146 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1147 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1148 struct iwl_rxon_context *ctx = vif_priv->ctx;
1149 int q;
1150
1151 if (WARN_ON(!ctx))
1152 return -EINVAL;
1153
1154 IWL_DEBUG_MAC80211(priv, "enter\n");
1155
1156 if (!iwl_is_ready_rf(priv)) {
1157 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1158 return -EIO;
1159 }
1160
1161 if (queue >= AC_NUM) {
1162 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1163 return 0;
1164 }
1165
1166 q = AC_NUM - 1 - queue;
1167
1168 mutex_lock(&priv->mutex);
1169
1170 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1171 cpu_to_le16(params->cw_min);
1172 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1173 cpu_to_le16(params->cw_max);
1174 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1175 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1176 cpu_to_le16((params->txop * 32));
1177
1178 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1179
1180 mutex_unlock(&priv->mutex);
1181
1182 IWL_DEBUG_MAC80211(priv, "leave\n");
1183 return 0;
1184 }
1185
1186 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1187 {
1188 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1189
1190 return priv->ibss_manager == IWL_IBSS_MANAGER;
1191 }
1192
1193 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1194 {
1195 iwl_connection_init_rx_config(priv, ctx);
1196
1197 iwlagn_set_rxon_chain(priv, ctx);
1198
1199 return iwlagn_commit_rxon(priv, ctx);
1200 }
1201
1202 static int iwl_setup_interface(struct iwl_priv *priv,
1203 struct iwl_rxon_context *ctx)
1204 {
1205 struct ieee80211_vif *vif = ctx->vif;
1206 int err;
1207
1208 lockdep_assert_held(&priv->mutex);
1209
1210 /*
1211 * This variable will be correct only when there's just
1212 * a single context, but all code using it is for hardware
1213 * that supports only one context.
1214 */
1215 priv->iw_mode = vif->type;
1216
1217 ctx->is_active = true;
1218
1219 err = iwl_set_mode(priv, ctx);
1220 if (err) {
1221 if (!ctx->always_active)
1222 ctx->is_active = false;
1223 return err;
1224 }
1225
1226 if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1227 vif->type == NL80211_IFTYPE_ADHOC) {
1228 /*
1229 * pretend to have high BT traffic as long as we
1230 * are operating in IBSS mode, as this will cause
1231 * the rate scaling etc. to behave as intended.
1232 */
1233 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1234 }
1235
1236 return 0;
1237 }
1238
1239 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1240 struct ieee80211_vif *vif)
1241 {
1242 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1243 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1244 struct iwl_rxon_context *tmp, *ctx = NULL;
1245 int err;
1246 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1247
1248 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1249 viftype, vif->addr);
1250
1251 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1252
1253 mutex_lock(&priv->mutex);
1254
1255 iwlagn_disable_roc(priv);
1256
1257 if (!iwl_is_ready_rf(priv)) {
1258 IWL_WARN(priv, "Try to add interface when device not ready\n");
1259 err = -EINVAL;
1260 goto out;
1261 }
1262
1263 for_each_context(priv, tmp) {
1264 u32 possible_modes =
1265 tmp->interface_modes | tmp->exclusive_interface_modes;
1266
1267 if (tmp->vif) {
1268 /* check if this busy context is exclusive */
1269 if (tmp->exclusive_interface_modes &
1270 BIT(tmp->vif->type)) {
1271 err = -EINVAL;
1272 goto out;
1273 }
1274 continue;
1275 }
1276
1277 if (!(possible_modes & BIT(viftype)))
1278 continue;
1279
1280 /* have maybe usable context w/o interface */
1281 ctx = tmp;
1282 break;
1283 }
1284
1285 if (!ctx) {
1286 err = -EOPNOTSUPP;
1287 goto out;
1288 }
1289
1290 vif_priv->ctx = ctx;
1291 ctx->vif = vif;
1292
1293 err = iwl_setup_interface(priv, ctx);
1294 if (!err)
1295 goto out;
1296
1297 ctx->vif = NULL;
1298 priv->iw_mode = NL80211_IFTYPE_STATION;
1299 out:
1300 mutex_unlock(&priv->mutex);
1301
1302 IWL_DEBUG_MAC80211(priv, "leave\n");
1303 return err;
1304 }
1305
1306 static void iwl_teardown_interface(struct iwl_priv *priv,
1307 struct ieee80211_vif *vif,
1308 bool mode_change)
1309 {
1310 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1311
1312 lockdep_assert_held(&priv->mutex);
1313
1314 if (priv->scan_vif == vif) {
1315 iwl_scan_cancel_timeout(priv, 200);
1316 iwl_force_scan_end(priv);
1317 }
1318
1319 if (!mode_change) {
1320 iwl_set_mode(priv, ctx);
1321 if (!ctx->always_active)
1322 ctx->is_active = false;
1323 }
1324
1325 /*
1326 * When removing the IBSS interface, overwrite the
1327 * BT traffic load with the stored one from the last
1328 * notification, if any. If this is a device that
1329 * doesn't implement this, this has no effect since
1330 * both values are the same and zero.
1331 */
1332 if (vif->type == NL80211_IFTYPE_ADHOC)
1333 priv->bt_traffic_load = priv->last_bt_traffic_load;
1334 }
1335
1336 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1337 struct ieee80211_vif *vif)
1338 {
1339 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1340 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1341
1342 IWL_DEBUG_MAC80211(priv, "enter\n");
1343
1344 mutex_lock(&priv->mutex);
1345
1346 if (WARN_ON(ctx->vif != vif)) {
1347 struct iwl_rxon_context *tmp;
1348 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1349 for_each_context(priv, tmp)
1350 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1351 tmp->ctxid, tmp, tmp->vif);
1352 }
1353 ctx->vif = NULL;
1354
1355 iwl_teardown_interface(priv, vif, false);
1356
1357 mutex_unlock(&priv->mutex);
1358
1359 IWL_DEBUG_MAC80211(priv, "leave\n");
1360
1361 }
1362
1363 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1364 struct ieee80211_vif *vif,
1365 enum nl80211_iftype newtype, bool newp2p)
1366 {
1367 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1368 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1369 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1370 struct iwl_rxon_context *tmp;
1371 enum nl80211_iftype newviftype = newtype;
1372 u32 interface_modes;
1373 int err;
1374
1375 IWL_DEBUG_MAC80211(priv, "enter\n");
1376
1377 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1378
1379 mutex_lock(&priv->mutex);
1380
1381 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1382 /*
1383 * Huh? But wait ... this can maybe happen when
1384 * we're in the middle of a firmware restart!
1385 */
1386 err = -EBUSY;
1387 goto out;
1388 }
1389
1390 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1391
1392 if (!(interface_modes & BIT(newtype))) {
1393 err = -EBUSY;
1394 goto out;
1395 }
1396
1397 /*
1398 * Refuse a change that should be done by moving from the PAN
1399 * context to the BSS context instead, if the BSS context is
1400 * available and can support the new interface type.
1401 */
1402 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1403 (bss_ctx->interface_modes & BIT(newtype) ||
1404 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1405 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1406 err = -EBUSY;
1407 goto out;
1408 }
1409
1410 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1411 for_each_context(priv, tmp) {
1412 if (ctx == tmp)
1413 continue;
1414
1415 if (!tmp->vif)
1416 continue;
1417
1418 /*
1419 * The current mode switch would be exclusive, but
1420 * another context is active ... refuse the switch.
1421 */
1422 err = -EBUSY;
1423 goto out;
1424 }
1425 }
1426
1427 /* success */
1428 iwl_teardown_interface(priv, vif, true);
1429 vif->type = newviftype;
1430 vif->p2p = newp2p;
1431 err = iwl_setup_interface(priv, ctx);
1432 WARN_ON(err);
1433 /*
1434 * We've switched internally, but submitting to the
1435 * device may have failed for some reason. Mask this
1436 * error, because otherwise mac80211 will not switch
1437 * (and set the interface type back) and we'll be
1438 * out of sync with it.
1439 */
1440 err = 0;
1441
1442 out:
1443 mutex_unlock(&priv->mutex);
1444 IWL_DEBUG_MAC80211(priv, "leave\n");
1445
1446 return err;
1447 }
1448
1449 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1450 struct ieee80211_vif *vif,
1451 struct cfg80211_scan_request *req)
1452 {
1453 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1454 int ret;
1455
1456 IWL_DEBUG_MAC80211(priv, "enter\n");
1457
1458 if (req->n_channels == 0)
1459 return -EINVAL;
1460
1461 mutex_lock(&priv->mutex);
1462
1463 /*
1464 * If an internal scan is in progress, just set
1465 * up the scan_request as per above.
1466 */
1467 if (priv->scan_type != IWL_SCAN_NORMAL) {
1468 IWL_DEBUG_SCAN(priv,
1469 "SCAN request during internal scan - defer\n");
1470 priv->scan_request = req;
1471 priv->scan_vif = vif;
1472 ret = 0;
1473 } else {
1474 priv->scan_request = req;
1475 priv->scan_vif = vif;
1476 /*
1477 * mac80211 will only ask for one band at a time
1478 * so using channels[0] here is ok
1479 */
1480 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1481 req->channels[0]->band);
1482 if (ret) {
1483 priv->scan_request = NULL;
1484 priv->scan_vif = NULL;
1485 }
1486 }
1487
1488 IWL_DEBUG_MAC80211(priv, "leave\n");
1489
1490 mutex_unlock(&priv->mutex);
1491
1492 return ret;
1493 }
1494
1495 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1496 {
1497 struct iwl_addsta_cmd cmd = {
1498 .mode = STA_CONTROL_MODIFY_MSK,
1499 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1500 .sta.sta_id = sta_id,
1501 };
1502
1503 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1504 }
1505
1506 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1507 struct ieee80211_vif *vif,
1508 enum sta_notify_cmd cmd,
1509 struct ieee80211_sta *sta)
1510 {
1511 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1512 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1513 int sta_id;
1514
1515 IWL_DEBUG_MAC80211(priv, "enter\n");
1516
1517 switch (cmd) {
1518 case STA_NOTIFY_SLEEP:
1519 WARN_ON(!sta_priv->client);
1520 sta_priv->asleep = true;
1521 if (atomic_read(&sta_priv->pending_frames) > 0)
1522 ieee80211_sta_block_awake(hw, sta, true);
1523 break;
1524 case STA_NOTIFY_AWAKE:
1525 WARN_ON(!sta_priv->client);
1526 if (!sta_priv->asleep)
1527 break;
1528 sta_priv->asleep = false;
1529 sta_id = iwl_sta_id(sta);
1530 if (sta_id != IWL_INVALID_STATION)
1531 iwl_sta_modify_ps_wake(priv, sta_id);
1532 break;
1533 default:
1534 break;
1535 }
1536 IWL_DEBUG_MAC80211(priv, "leave\n");
1537 }
1538
1539 struct ieee80211_ops iwlagn_hw_ops = {
1540 .tx = iwlagn_mac_tx,
1541 .start = iwlagn_mac_start,
1542 .stop = iwlagn_mac_stop,
1543 #ifdef CONFIG_PM_SLEEP
1544 .suspend = iwlagn_mac_suspend,
1545 .resume = iwlagn_mac_resume,
1546 #endif
1547 .add_interface = iwlagn_mac_add_interface,
1548 .remove_interface = iwlagn_mac_remove_interface,
1549 .change_interface = iwlagn_mac_change_interface,
1550 .config = iwlagn_mac_config,
1551 .configure_filter = iwlagn_configure_filter,
1552 .set_key = iwlagn_mac_set_key,
1553 .update_tkip_key = iwlagn_mac_update_tkip_key,
1554 .set_rekey_data = iwlagn_mac_set_rekey_data,
1555 .conf_tx = iwlagn_mac_conf_tx,
1556 .bss_info_changed = iwlagn_bss_info_changed,
1557 .ampdu_action = iwlagn_mac_ampdu_action,
1558 .hw_scan = iwlagn_mac_hw_scan,
1559 .sta_notify = iwlagn_mac_sta_notify,
1560 .sta_state = iwlagn_mac_sta_state,
1561 .channel_switch = iwlagn_mac_channel_switch,
1562 .flush = iwlagn_mac_flush,
1563 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1564 .remain_on_channel = iwlagn_mac_remain_on_channel,
1565 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1566 .rssi_callback = iwlagn_mac_rssi_callback,
1567 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1568 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1569 .set_tim = iwlagn_mac_set_tim,
1570 };
1571
1572 /* This function both allocates and initializes hw and priv. */
1573 struct ieee80211_hw *iwl_alloc_all(void)
1574 {
1575 struct iwl_priv *priv;
1576 struct iwl_op_mode *op_mode;
1577 /* mac80211 allocates memory for this device instance, including
1578 * space for this driver's private structure */
1579 struct ieee80211_hw *hw;
1580
1581 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1582 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1583 if (!hw)
1584 goto out;
1585
1586 op_mode = hw->priv;
1587 priv = IWL_OP_MODE_GET_DVM(op_mode);
1588 priv->hw = hw;
1589
1590 out:
1591 return hw;
1592 }
Linux kernel - Deliverables
This page took 0.066732 seconds and 6 git commands to generate.