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 */
iwlagn_mac_setup_register(struct iwl_priv * priv,const struct iwl_ucode_capabilities * capa)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 #ifdef CONFIG_PM_SLEEP
200 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
201 trans(priv)->ops->wowlan_suspend &&
202 device_can_wakeup(trans(priv)->dev)) {
203 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
204 WIPHY_WOWLAN_DISCONNECT |
205 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
206 WIPHY_WOWLAN_RFKILL_RELEASE;
207 if (!iwlagn_mod_params.sw_crypto)
208 hw->wiphy->wowlan.flags |=
209 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
210 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
211
212 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
213 hw->wiphy->wowlan.pattern_min_len =
214 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
215 hw->wiphy->wowlan.pattern_max_len =
216 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
217 }
218 #endif
219
220 if (iwlagn_mod_params.power_save)
221 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
222 else
223 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
224
225 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
226 /* we create the 802.11 header and a zero-length SSID element */
227 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
228
229 /* Default value; 4 EDCA QOS priorities */
230 hw->queues = 4;
231
232 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
233
234 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
235 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
236 &priv->bands[IEEE80211_BAND_2GHZ];
237 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
238 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
239 &priv->bands[IEEE80211_BAND_5GHZ];
240
241 hw->wiphy->hw_version = trans(priv)->hw_id;
242
243 iwl_leds_init(priv);
244
245 ret = ieee80211_register_hw(priv->hw);
246 if (ret) {
247 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
248 iwl_leds_exit(priv);
249 return ret;
250 }
251 priv->mac80211_registered = 1;
252
253 return 0;
254 }
255
iwlagn_mac_unregister(struct iwl_priv * priv)256 void iwlagn_mac_unregister(struct iwl_priv *priv)
257 {
258 if (!priv->mac80211_registered)
259 return;
260 iwl_leds_exit(priv);
261 ieee80211_unregister_hw(priv->hw);
262 priv->mac80211_registered = 0;
263 }
264
__iwl_up(struct iwl_priv * priv)265 static int __iwl_up(struct iwl_priv *priv)
266 {
267 struct iwl_rxon_context *ctx;
268 int ret;
269
270 lockdep_assert_held(&priv->mutex);
271
272 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
273 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
274 return -EIO;
275 }
276
277 for_each_context(priv, ctx) {
278 ret = iwlagn_alloc_bcast_station(priv, ctx);
279 if (ret) {
280 iwl_dealloc_bcast_stations(priv);
281 return ret;
282 }
283 }
284
285 ret = iwl_run_init_ucode(priv);
286 if (ret) {
287 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
288 goto error;
289 }
290
291 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
292 if (ret) {
293 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
294 goto error;
295 }
296
297 ret = iwl_alive_start(priv);
298 if (ret)
299 goto error;
300 return 0;
301
302 error:
303 set_bit(STATUS_EXIT_PENDING, &priv->status);
304 iwl_down(priv);
305 clear_bit(STATUS_EXIT_PENDING, &priv->status);
306
307 IWL_ERR(priv, "Unable to initialize device.\n");
308 return ret;
309 }
310
iwlagn_mac_start(struct ieee80211_hw * hw)311 static int iwlagn_mac_start(struct ieee80211_hw *hw)
312 {
313 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
314 int ret;
315
316 IWL_DEBUG_MAC80211(priv, "enter\n");
317
318 /* we should be verifying the device is ready to be opened */
319 mutex_lock(&priv->mutex);
320 ret = __iwl_up(priv);
321 mutex_unlock(&priv->mutex);
322 if (ret)
323 return ret;
324
325 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
326
327 /* Now we should be done, and the READY bit should be set. */
328 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
329 ret = -EIO;
330
331 iwlagn_led_enable(priv);
332
333 priv->is_open = 1;
334 IWL_DEBUG_MAC80211(priv, "leave\n");
335 return 0;
336 }
337
iwlagn_mac_stop(struct ieee80211_hw * hw)338 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
339 {
340 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
341
342 IWL_DEBUG_MAC80211(priv, "enter\n");
343
344 if (!priv->is_open)
345 return;
346
347 priv->is_open = 0;
348
349 mutex_lock(&priv->mutex);
350 iwl_down(priv);
351 mutex_unlock(&priv->mutex);
352
353 iwl_cancel_deferred_work(priv);
354
355 flush_workqueue(priv->workqueue);
356
357 /* User space software may expect getting rfkill changes
358 * even if interface is down, trans->down will leave the RF
359 * kill interrupt enabled
360 */
361 iwl_trans_stop_hw(trans(priv));
362
363 IWL_DEBUG_MAC80211(priv, "leave\n");
364 }
365
iwlagn_mac_set_rekey_data(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct cfg80211_gtk_rekey_data * data)366 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
367 struct ieee80211_vif *vif,
368 struct cfg80211_gtk_rekey_data *data)
369 {
370 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
371
372 if (iwlagn_mod_params.sw_crypto)
373 return;
374
375 IWL_DEBUG_MAC80211(priv, "enter\n");
376 mutex_lock(&priv->mutex);
377
378 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
379 goto out;
380
381 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
382 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
383 priv->replay_ctr =
384 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
385 priv->have_rekey_data = true;
386
387 out:
388 mutex_unlock(&priv->mutex);
389 IWL_DEBUG_MAC80211(priv, "leave\n");
390 }
391
392 #ifdef CONFIG_PM_SLEEP
393
iwlagn_mac_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)394 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
395 struct cfg80211_wowlan *wowlan)
396 {
397 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
398 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
399 int ret;
400
401 if (WARN_ON(!wowlan))
402 return -EINVAL;
403
404 IWL_DEBUG_MAC80211(priv, "enter\n");
405 mutex_lock(&priv->mutex);
406
407 /* Don't attempt WoWLAN when not associated, tear down instead. */
408 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
409 !iwl_is_associated_ctx(ctx)) {
410 ret = 1;
411 goto out;
412 }
413
414 ret = iwlagn_suspend(priv, wowlan);
415 if (ret)
416 goto error;
417
418 device_set_wakeup_enable(trans(priv)->dev, true);
419
420 iwl_trans_wowlan_suspend(trans(priv));
421
422 goto out;
423
424 error:
425 priv->wowlan = false;
426 iwlagn_prepare_restart(priv);
427 ieee80211_restart_hw(priv->hw);
428 out:
429 mutex_unlock(&priv->mutex);
430 IWL_DEBUG_MAC80211(priv, "leave\n");
431
432 return ret;
433 }
434
iwlagn_mac_resume(struct ieee80211_hw * hw)435 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
436 {
437 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
438 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
439 struct ieee80211_vif *vif;
440 unsigned long flags;
441 u32 base, status = 0xffffffff;
442 int ret = -EIO;
443 const struct fw_img *img;
444
445 IWL_DEBUG_MAC80211(priv, "enter\n");
446 mutex_lock(&priv->mutex);
447
448 iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
449 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
450
451 base = priv->shrd->device_pointers.error_event_table;
452 if (iwlagn_hw_valid_rtc_data_addr(base)) {
453 spin_lock_irqsave(&trans(priv)->reg_lock, flags);
454 ret = iwl_grab_nic_access_silent(trans(priv));
455 if (likely(ret == 0)) {
456 iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, base);
457 status = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
458 iwl_release_nic_access(trans(priv));
459 }
460 spin_unlock_irqrestore(&trans(priv)->reg_lock, flags);
461
462 #ifdef CONFIG_IWLWIFI_DEBUGFS
463 if (ret == 0) {
464 img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
465 if (!priv->wowlan_sram) {
466 priv->wowlan_sram =
467 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
468 GFP_KERNEL);
469 }
470
471 if (priv->wowlan_sram)
472 _iwl_read_targ_mem_words(
473 trans(priv), 0x800000,
474 priv->wowlan_sram,
475 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
476 }
477 #endif
478 }
479
480 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
481 vif = ctx->vif;
482
483 priv->wowlan = false;
484
485 device_set_wakeup_enable(trans(priv)->dev, false);
486
487 iwlagn_prepare_restart(priv);
488
489 memset((void *)&ctx->active, 0, sizeof(ctx->active));
490 iwl_connection_init_rx_config(priv, ctx);
491 iwlagn_set_rxon_chain(priv, ctx);
492
493 mutex_unlock(&priv->mutex);
494 IWL_DEBUG_MAC80211(priv, "leave\n");
495
496 ieee80211_resume_disconnect(vif);
497
498 return 1;
499 }
500
501 #endif
502
iwlagn_mac_tx(struct ieee80211_hw * hw,struct sk_buff * skb)503 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
504 {
505 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
506
507 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
508 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
509
510 if (iwlagn_tx_skb(priv, skb))
511 dev_kfree_skb_any(skb);
512 }
513
iwlagn_mac_update_tkip_key(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta,u32 iv32,u16 * phase1key)514 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
515 struct ieee80211_vif *vif,
516 struct ieee80211_key_conf *keyconf,
517 struct ieee80211_sta *sta,
518 u32 iv32, u16 *phase1key)
519 {
520 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
521
522 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
523 }
524
iwlagn_mac_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)525 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
526 struct ieee80211_vif *vif,
527 struct ieee80211_sta *sta,
528 struct ieee80211_key_conf *key)
529 {
530 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
531 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
532 struct iwl_rxon_context *ctx = vif_priv->ctx;
533 int ret;
534 bool is_default_wep_key = false;
535
536 IWL_DEBUG_MAC80211(priv, "enter\n");
537
538 if (iwlagn_mod_params.sw_crypto) {
539 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
540 return -EOPNOTSUPP;
541 }
542
543 switch (key->cipher) {
544 case WLAN_CIPHER_SUITE_TKIP:
545 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
546 /* fall through */
547 case WLAN_CIPHER_SUITE_CCMP:
548 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
549 break;
550 default:
551 break;
552 }
553
554 /*
555 * We could program these keys into the hardware as well, but we
556 * don't expect much multicast traffic in IBSS and having keys
557 * for more stations is probably more useful.
558 *
559 * Mark key TX-only and return 0.
560 */
561 if (vif->type == NL80211_IFTYPE_ADHOC &&
562 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
563 key->hw_key_idx = WEP_INVALID_OFFSET;
564 return 0;
565 }
566
567 /* If they key was TX-only, accept deletion */
568 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
569 return 0;
570
571 mutex_lock(&priv->mutex);
572 iwl_scan_cancel_timeout(priv, 100);
573
574 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
575
576 /*
577 * If we are getting WEP group key and we didn't receive any key mapping
578 * so far, we are in legacy wep mode (group key only), otherwise we are
579 * in 1X mode.
580 * In legacy wep mode, we use another host command to the uCode.
581 */
582 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
583 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
584 if (cmd == SET_KEY)
585 is_default_wep_key = !ctx->key_mapping_keys;
586 else
587 is_default_wep_key =
588 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
589 }
590
591
592 switch (cmd) {
593 case SET_KEY:
594 if (is_default_wep_key) {
595 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
596 break;
597 }
598 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
599 if (ret) {
600 /*
601 * can't add key for RX, but we don't need it
602 * in the device for TX so still return 0
603 */
604 ret = 0;
605 key->hw_key_idx = WEP_INVALID_OFFSET;
606 }
607
608 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
609 break;
610 case DISABLE_KEY:
611 if (is_default_wep_key)
612 ret = iwl_remove_default_wep_key(priv, ctx, key);
613 else
614 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
615
616 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
617 break;
618 default:
619 ret = -EINVAL;
620 }
621
622 mutex_unlock(&priv->mutex);
623 IWL_DEBUG_MAC80211(priv, "leave\n");
624
625 return ret;
626 }
627
iwlagn_mac_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum ieee80211_ampdu_mlme_action action,struct ieee80211_sta * sta,u16 tid,u16 * ssn,u8 buf_size)628 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
629 struct ieee80211_vif *vif,
630 enum ieee80211_ampdu_mlme_action action,
631 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
632 u8 buf_size)
633 {
634 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
635 int ret = -EINVAL;
636 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
637
638 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
639 sta->addr, tid);
640
641 if (!(hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE))
642 return -EACCES;
643
644 IWL_DEBUG_MAC80211(priv, "enter\n");
645 mutex_lock(&priv->mutex);
646
647 switch (action) {
648 case IEEE80211_AMPDU_RX_START:
649 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
650 break;
651 IWL_DEBUG_HT(priv, "start Rx\n");
652 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
653 break;
654 case IEEE80211_AMPDU_RX_STOP:
655 IWL_DEBUG_HT(priv, "stop Rx\n");
656 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
657 break;
658 case IEEE80211_AMPDU_TX_START:
659 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
660 break;
661 IWL_DEBUG_HT(priv, "start Tx\n");
662 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
663 break;
664 case IEEE80211_AMPDU_TX_STOP:
665 IWL_DEBUG_HT(priv, "stop Tx\n");
666 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
667 if ((ret == 0) && (priv->agg_tids_count > 0)) {
668 priv->agg_tids_count--;
669 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
670 priv->agg_tids_count);
671 }
672 if (!priv->agg_tids_count &&
673 hw_params(priv).use_rts_for_aggregation) {
674 /*
675 * switch off RTS/CTS if it was previously enabled
676 */
677 sta_priv->lq_sta.lq.general_params.flags &=
678 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
679 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
680 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
681 }
682 break;
683 case IEEE80211_AMPDU_TX_OPERATIONAL:
684 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
685 break;
686 }
687 mutex_unlock(&priv->mutex);
688 IWL_DEBUG_MAC80211(priv, "leave\n");
689 return ret;
690 }
691
iwlagn_mac_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)692 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
693 struct ieee80211_vif *vif,
694 struct ieee80211_sta *sta)
695 {
696 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
697 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
698 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
699 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
700 int ret;
701 u8 sta_id;
702
703 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
704 sta->addr);
705 sta_priv->sta_id = IWL_INVALID_STATION;
706
707 atomic_set(&sta_priv->pending_frames, 0);
708 if (vif->type == NL80211_IFTYPE_AP)
709 sta_priv->client = true;
710
711 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
712 is_ap, sta, &sta_id);
713 if (ret) {
714 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
715 sta->addr, ret);
716 /* Should we return success if return code is EEXIST ? */
717 return ret;
718 }
719
720 sta_priv->sta_id = sta_id;
721
722 return 0;
723 }
724
iwlagn_mac_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)725 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
726 struct ieee80211_vif *vif,
727 struct ieee80211_sta *sta)
728 {
729 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
730 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
731 int ret;
732
733 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
734
735 if (vif->type == NL80211_IFTYPE_STATION) {
736 /*
737 * Station will be removed from device when the RXON
738 * is set to unassociated -- just deactivate it here
739 * to avoid re-programming it.
740 */
741 ret = 0;
742 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
743 } else {
744 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
745 if (ret)
746 IWL_DEBUG_QUIET_RFKILL(priv,
747 "Error removing station %pM\n", sta->addr);
748 }
749 return ret;
750 }
751
iwlagn_mac_sta_state(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta,enum ieee80211_sta_state old_state,enum ieee80211_sta_state new_state)752 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
753 struct ieee80211_vif *vif,
754 struct ieee80211_sta *sta,
755 enum ieee80211_sta_state old_state,
756 enum ieee80211_sta_state new_state)
757 {
758 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
759 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
760 enum {
761 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
762 } op = NONE;
763 int ret;
764
765 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
766 sta->addr, old_state, new_state);
767
768 mutex_lock(&priv->mutex);
769 if (vif->type == NL80211_IFTYPE_STATION) {
770 if (old_state == IEEE80211_STA_NOTEXIST &&
771 new_state == IEEE80211_STA_NONE)
772 op = ADD;
773 else if (old_state == IEEE80211_STA_NONE &&
774 new_state == IEEE80211_STA_NOTEXIST)
775 op = REMOVE;
776 else if (old_state == IEEE80211_STA_AUTH &&
777 new_state == IEEE80211_STA_ASSOC)
778 op = HT_RATE_INIT;
779 } else {
780 if (old_state == IEEE80211_STA_AUTH &&
781 new_state == IEEE80211_STA_ASSOC)
782 op = ADD_RATE_INIT;
783 else if (old_state == IEEE80211_STA_ASSOC &&
784 new_state == IEEE80211_STA_AUTH)
785 op = REMOVE;
786 }
787
788 switch (op) {
789 case ADD:
790 ret = iwlagn_mac_sta_add(hw, vif, sta);
791 if (ret)
792 break;
793 /*
794 * Clear the in-progress flag, the AP station entry was added
795 * but we'll initialize LQ only when we've associated (which
796 * would also clear the in-progress flag). This is necessary
797 * in case we never initialize LQ because association fails.
798 */
799 spin_lock_bh(&priv->sta_lock);
800 priv->stations[iwl_sta_id(sta)].used &=
801 ~IWL_STA_UCODE_INPROGRESS;
802 spin_unlock_bh(&priv->sta_lock);
803 break;
804 case REMOVE:
805 ret = iwlagn_mac_sta_remove(hw, vif, sta);
806 break;
807 case ADD_RATE_INIT:
808 ret = iwlagn_mac_sta_add(hw, vif, sta);
809 if (ret)
810 break;
811 /* Initialize rate scaling */
812 IWL_DEBUG_INFO(priv,
813 "Initializing rate scaling for station %pM\n",
814 sta->addr);
815 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
816 ret = 0;
817 break;
818 case HT_RATE_INIT:
819 /* Initialize rate scaling */
820 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
821 if (ret)
822 break;
823 IWL_DEBUG_INFO(priv,
824 "Initializing rate scaling for station %pM\n",
825 sta->addr);
826 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
827 ret = 0;
828 break;
829 default:
830 ret = 0;
831 break;
832 }
833
834 /*
835 * mac80211 might WARN if we fail, but due the way we
836 * (badly) handle hard rfkill, we might fail here
837 */
838 if (iwl_is_rfkill(priv))
839 ret = 0;
840
841 mutex_unlock(&priv->mutex);
842 IWL_DEBUG_MAC80211(priv, "leave\n");
843
844 return ret;
845 }
846
iwlagn_mac_channel_switch(struct ieee80211_hw * hw,struct ieee80211_channel_switch * ch_switch)847 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
848 struct ieee80211_channel_switch *ch_switch)
849 {
850 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
851 const struct iwl_channel_info *ch_info;
852 struct ieee80211_conf *conf = &hw->conf;
853 struct ieee80211_channel *channel = ch_switch->channel;
854 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
855 /*
856 * MULTI-FIXME
857 * When we add support for multiple interfaces, we need to
858 * revisit this. The channel switch command in the device
859 * only affects the BSS context, but what does that really
860 * mean? And what if we get a CSA on the second interface?
861 * This needs a lot of work.
862 */
863 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
864 u16 ch;
865
866 IWL_DEBUG_MAC80211(priv, "enter\n");
867
868 mutex_lock(&priv->mutex);
869
870 if (iwl_is_rfkill(priv))
871 goto out;
872
873 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
874 test_bit(STATUS_SCANNING, &priv->status) ||
875 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
876 goto out;
877
878 if (!iwl_is_associated_ctx(ctx))
879 goto out;
880
881 if (!cfg(priv)->lib->set_channel_switch)
882 goto out;
883
884 ch = channel->hw_value;
885 if (le16_to_cpu(ctx->active.channel) == ch)
886 goto out;
887
888 ch_info = iwl_get_channel_info(priv, channel->band, ch);
889 if (!is_channel_valid(ch_info)) {
890 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
891 goto out;
892 }
893
894 priv->current_ht_config.smps = conf->smps_mode;
895
896 /* Configure HT40 channels */
897 ctx->ht.enabled = conf_is_ht(conf);
898 if (ctx->ht.enabled)
899 iwlagn_config_ht40(conf, ctx);
900 else
901 ctx->ht.is_40mhz = false;
902
903 if ((le16_to_cpu(ctx->staging.channel) != ch))
904 ctx->staging.flags = 0;
905
906 iwl_set_rxon_channel(priv, channel, ctx);
907 iwl_set_rxon_ht(priv, ht_conf);
908 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
909
910 iwl_set_rate(priv);
911 /*
912 * at this point, staging_rxon has the
913 * configuration for channel switch
914 */
915 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
916 priv->switch_channel = cpu_to_le16(ch);
917 if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
918 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
919 priv->switch_channel = 0;
920 ieee80211_chswitch_done(ctx->vif, false);
921 }
922
923 out:
924 mutex_unlock(&priv->mutex);
925 IWL_DEBUG_MAC80211(priv, "leave\n");
926 }
927
iwlagn_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)928 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
929 unsigned int changed_flags,
930 unsigned int *total_flags,
931 u64 multicast)
932 {
933 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
934 __le32 filter_or = 0, filter_nand = 0;
935 struct iwl_rxon_context *ctx;
936
937 #define CHK(test, flag) do { \
938 if (*total_flags & (test)) \
939 filter_or |= (flag); \
940 else \
941 filter_nand |= (flag); \
942 } while (0)
943
944 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
945 changed_flags, *total_flags);
946
947 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
948 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
949 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
950 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
951
952 #undef CHK
953
954 mutex_lock(&priv->mutex);
955
956 for_each_context(priv, ctx) {
957 ctx->staging.filter_flags &= ~filter_nand;
958 ctx->staging.filter_flags |= filter_or;
959
960 /*
961 * Not committing directly because hardware can perform a scan,
962 * but we'll eventually commit the filter flags change anyway.
963 */
964 }
965
966 mutex_unlock(&priv->mutex);
967
968 /*
969 * Receiving all multicast frames is always enabled by the
970 * default flags setup in iwl_connection_init_rx_config()
971 * since we currently do not support programming multicast
972 * filters into the device.
973 */
974 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
975 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
976 }
977
iwlagn_mac_flush(struct ieee80211_hw * hw,bool drop)978 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
979 {
980 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
981
982 mutex_lock(&priv->mutex);
983 IWL_DEBUG_MAC80211(priv, "enter\n");
984
985 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
986 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
987 goto done;
988 }
989 if (iwl_is_rfkill(priv)) {
990 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
991 goto done;
992 }
993
994 /*
995 * mac80211 will not push any more frames for transmit
996 * until the flush is completed
997 */
998 if (drop) {
999 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1000 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1001 IWL_ERR(priv, "flush request fail\n");
1002 goto done;
1003 }
1004 }
1005 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1006 iwl_trans_wait_tx_queue_empty(trans(priv));
1007 done:
1008 mutex_unlock(&priv->mutex);
1009 IWL_DEBUG_MAC80211(priv, "leave\n");
1010 }
1011
iwlagn_mac_remain_on_channel(struct ieee80211_hw * hw,struct ieee80211_channel * channel,enum nl80211_channel_type channel_type,int duration)1012 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1013 struct ieee80211_channel *channel,
1014 enum nl80211_channel_type channel_type,
1015 int duration)
1016 {
1017 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1018 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1019 int err = 0;
1020
1021 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1022 return -EOPNOTSUPP;
1023
1024 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1025 return -EOPNOTSUPP;
1026
1027 IWL_DEBUG_MAC80211(priv, "enter\n");
1028 mutex_lock(&priv->mutex);
1029
1030 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1031 err = -EBUSY;
1032 goto out;
1033 }
1034
1035 priv->hw_roc_channel = channel;
1036 priv->hw_roc_chantype = channel_type;
1037 /* convert from ms to TU */
1038 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1039 priv->hw_roc_start_notified = false;
1040 cancel_delayed_work(&priv->hw_roc_disable_work);
1041
1042 if (!ctx->is_active) {
1043 static const struct iwl_qos_info default_qos_data = {
1044 .def_qos_parm = {
1045 .ac[0] = {
1046 .cw_min = cpu_to_le16(3),
1047 .cw_max = cpu_to_le16(7),
1048 .aifsn = 2,
1049 .edca_txop = cpu_to_le16(1504),
1050 },
1051 .ac[1] = {
1052 .cw_min = cpu_to_le16(7),
1053 .cw_max = cpu_to_le16(15),
1054 .aifsn = 2,
1055 .edca_txop = cpu_to_le16(3008),
1056 },
1057 .ac[2] = {
1058 .cw_min = cpu_to_le16(15),
1059 .cw_max = cpu_to_le16(1023),
1060 .aifsn = 3,
1061 },
1062 .ac[3] = {
1063 .cw_min = cpu_to_le16(15),
1064 .cw_max = cpu_to_le16(1023),
1065 .aifsn = 7,
1066 },
1067 },
1068 };
1069
1070 ctx->is_active = true;
1071 ctx->qos_data = default_qos_data;
1072 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1073 memcpy(ctx->staging.node_addr,
1074 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1075 ETH_ALEN);
1076 memcpy(ctx->staging.bssid_addr,
1077 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1078 ETH_ALEN);
1079 err = iwlagn_commit_rxon(priv, ctx);
1080 if (err)
1081 goto out;
1082 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1083 RXON_FILTER_PROMISC_MSK |
1084 RXON_FILTER_CTL2HOST_MSK;
1085
1086 err = iwlagn_commit_rxon(priv, ctx);
1087 if (err) {
1088 iwlagn_disable_roc(priv);
1089 goto out;
1090 }
1091 priv->hw_roc_setup = true;
1092 }
1093
1094 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1095 if (err)
1096 iwlagn_disable_roc(priv);
1097
1098 out:
1099 mutex_unlock(&priv->mutex);
1100 IWL_DEBUG_MAC80211(priv, "leave\n");
1101
1102 return err;
1103 }
1104
iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw * hw)1105 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1106 {
1107 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1108
1109 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1110 return -EOPNOTSUPP;
1111
1112 IWL_DEBUG_MAC80211(priv, "enter\n");
1113 mutex_lock(&priv->mutex);
1114 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1115 iwlagn_disable_roc(priv);
1116 mutex_unlock(&priv->mutex);
1117 IWL_DEBUG_MAC80211(priv, "leave\n");
1118
1119 return 0;
1120 }
1121
iwlagn_mac_rssi_callback(struct ieee80211_hw * hw,enum ieee80211_rssi_event rssi_event)1122 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1123 enum ieee80211_rssi_event rssi_event)
1124 {
1125 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1126
1127 IWL_DEBUG_MAC80211(priv, "enter\n");
1128 mutex_lock(&priv->mutex);
1129
1130 if (cfg(priv)->bt_params &&
1131 cfg(priv)->bt_params->advanced_bt_coexist) {
1132 if (rssi_event == RSSI_EVENT_LOW)
1133 priv->bt_enable_pspoll = true;
1134 else if (rssi_event == RSSI_EVENT_HIGH)
1135 priv->bt_enable_pspoll = false;
1136
1137 iwlagn_send_advance_bt_config(priv);
1138 } else {
1139 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1140 "ignoring RSSI callback\n");
1141 }
1142
1143 mutex_unlock(&priv->mutex);
1144 IWL_DEBUG_MAC80211(priv, "leave\n");
1145 }
1146
iwlagn_mac_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)1147 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1148 struct ieee80211_sta *sta, bool set)
1149 {
1150 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1151
1152 queue_work(priv->workqueue, &priv->beacon_update);
1153
1154 return 0;
1155 }
1156
iwlagn_mac_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)1157 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1158 struct ieee80211_vif *vif, u16 queue,
1159 const struct ieee80211_tx_queue_params *params)
1160 {
1161 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1162 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1163 struct iwl_rxon_context *ctx = vif_priv->ctx;
1164 int q;
1165
1166 if (WARN_ON(!ctx))
1167 return -EINVAL;
1168
1169 IWL_DEBUG_MAC80211(priv, "enter\n");
1170
1171 if (!iwl_is_ready_rf(priv)) {
1172 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1173 return -EIO;
1174 }
1175
1176 if (queue >= AC_NUM) {
1177 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1178 return 0;
1179 }
1180
1181 q = AC_NUM - 1 - queue;
1182
1183 mutex_lock(&priv->mutex);
1184
1185 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1186 cpu_to_le16(params->cw_min);
1187 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1188 cpu_to_le16(params->cw_max);
1189 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1190 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1191 cpu_to_le16((params->txop * 32));
1192
1193 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1194
1195 mutex_unlock(&priv->mutex);
1196
1197 IWL_DEBUG_MAC80211(priv, "leave\n");
1198 return 0;
1199 }
1200
iwlagn_mac_tx_last_beacon(struct ieee80211_hw * hw)1201 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1202 {
1203 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1204
1205 return priv->ibss_manager == IWL_IBSS_MANAGER;
1206 }
1207
iwl_set_mode(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1208 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1209 {
1210 iwl_connection_init_rx_config(priv, ctx);
1211
1212 iwlagn_set_rxon_chain(priv, ctx);
1213
1214 return iwlagn_commit_rxon(priv, ctx);
1215 }
1216
iwl_setup_interface(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1217 static int iwl_setup_interface(struct iwl_priv *priv,
1218 struct iwl_rxon_context *ctx)
1219 {
1220 struct ieee80211_vif *vif = ctx->vif;
1221 int err;
1222
1223 lockdep_assert_held(&priv->mutex);
1224
1225 /*
1226 * This variable will be correct only when there's just
1227 * a single context, but all code using it is for hardware
1228 * that supports only one context.
1229 */
1230 priv->iw_mode = vif->type;
1231
1232 ctx->is_active = true;
1233
1234 err = iwl_set_mode(priv, ctx);
1235 if (err) {
1236 if (!ctx->always_active)
1237 ctx->is_active = false;
1238 return err;
1239 }
1240
1241 if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1242 vif->type == NL80211_IFTYPE_ADHOC) {
1243 /*
1244 * pretend to have high BT traffic as long as we
1245 * are operating in IBSS mode, as this will cause
1246 * the rate scaling etc. to behave as intended.
1247 */
1248 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1249 }
1250
1251 return 0;
1252 }
1253
iwlagn_mac_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1254 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1255 struct ieee80211_vif *vif)
1256 {
1257 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1258 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1259 struct iwl_rxon_context *tmp, *ctx = NULL;
1260 int err;
1261 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1262 bool reset = false;
1263
1264 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1265 viftype, vif->addr);
1266
1267 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1268
1269 mutex_lock(&priv->mutex);
1270
1271 iwlagn_disable_roc(priv);
1272
1273 if (!iwl_is_ready_rf(priv)) {
1274 IWL_WARN(priv, "Try to add interface when device not ready\n");
1275 err = -EINVAL;
1276 goto out;
1277 }
1278
1279 for_each_context(priv, tmp) {
1280 u32 possible_modes =
1281 tmp->interface_modes | tmp->exclusive_interface_modes;
1282
1283 if (tmp->vif) {
1284 /* On reset we need to add the same interface again */
1285 if (tmp->vif == vif) {
1286 reset = true;
1287 ctx = tmp;
1288 break;
1289 }
1290
1291 /* check if this busy context is exclusive */
1292 if (tmp->exclusive_interface_modes &
1293 BIT(tmp->vif->type)) {
1294 err = -EINVAL;
1295 goto out;
1296 }
1297 continue;
1298 }
1299
1300 if (!(possible_modes & BIT(viftype)))
1301 continue;
1302
1303 /* have maybe usable context w/o interface */
1304 ctx = tmp;
1305 break;
1306 }
1307
1308 if (!ctx) {
1309 err = -EOPNOTSUPP;
1310 goto out;
1311 }
1312
1313 vif_priv->ctx = ctx;
1314 ctx->vif = vif;
1315
1316 err = iwl_setup_interface(priv, ctx);
1317 if (!err || reset)
1318 goto out;
1319
1320 ctx->vif = NULL;
1321 priv->iw_mode = NL80211_IFTYPE_STATION;
1322 out:
1323 mutex_unlock(&priv->mutex);
1324
1325 IWL_DEBUG_MAC80211(priv, "leave\n");
1326 return err;
1327 }
1328
iwl_teardown_interface(struct iwl_priv * priv,struct ieee80211_vif * vif,bool mode_change)1329 static void iwl_teardown_interface(struct iwl_priv *priv,
1330 struct ieee80211_vif *vif,
1331 bool mode_change)
1332 {
1333 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1334
1335 lockdep_assert_held(&priv->mutex);
1336
1337 if (priv->scan_vif == vif) {
1338 iwl_scan_cancel_timeout(priv, 200);
1339 iwl_force_scan_end(priv);
1340 }
1341
1342 if (!mode_change) {
1343 iwl_set_mode(priv, ctx);
1344 if (!ctx->always_active)
1345 ctx->is_active = false;
1346 }
1347
1348 /*
1349 * When removing the IBSS interface, overwrite the
1350 * BT traffic load with the stored one from the last
1351 * notification, if any. If this is a device that
1352 * doesn't implement this, this has no effect since
1353 * both values are the same and zero.
1354 */
1355 if (vif->type == NL80211_IFTYPE_ADHOC)
1356 priv->bt_traffic_load = priv->last_bt_traffic_load;
1357 }
1358
iwlagn_mac_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1359 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1360 struct ieee80211_vif *vif)
1361 {
1362 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1363 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1364
1365 IWL_DEBUG_MAC80211(priv, "enter\n");
1366
1367 mutex_lock(&priv->mutex);
1368
1369 if (WARN_ON(ctx->vif != vif)) {
1370 struct iwl_rxon_context *tmp;
1371 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1372 for_each_context(priv, tmp)
1373 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1374 tmp->ctxid, tmp, tmp->vif);
1375 }
1376 ctx->vif = NULL;
1377
1378 iwl_teardown_interface(priv, vif, false);
1379
1380 mutex_unlock(&priv->mutex);
1381
1382 IWL_DEBUG_MAC80211(priv, "leave\n");
1383
1384 }
1385
iwlagn_mac_change_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_iftype newtype,bool newp2p)1386 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1387 struct ieee80211_vif *vif,
1388 enum nl80211_iftype newtype, bool newp2p)
1389 {
1390 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1391 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1392 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1393 struct iwl_rxon_context *tmp;
1394 enum nl80211_iftype newviftype = newtype;
1395 u32 interface_modes;
1396 int err;
1397
1398 IWL_DEBUG_MAC80211(priv, "enter\n");
1399
1400 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1401
1402 mutex_lock(&priv->mutex);
1403
1404 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1405 /*
1406 * Huh? But wait ... this can maybe happen when
1407 * we're in the middle of a firmware restart!
1408 */
1409 err = -EBUSY;
1410 goto out;
1411 }
1412
1413 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1414
1415 if (!(interface_modes & BIT(newtype))) {
1416 err = -EBUSY;
1417 goto out;
1418 }
1419
1420 /*
1421 * Refuse a change that should be done by moving from the PAN
1422 * context to the BSS context instead, if the BSS context is
1423 * available and can support the new interface type.
1424 */
1425 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1426 (bss_ctx->interface_modes & BIT(newtype) ||
1427 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1428 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1429 err = -EBUSY;
1430 goto out;
1431 }
1432
1433 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1434 for_each_context(priv, tmp) {
1435 if (ctx == tmp)
1436 continue;
1437
1438 if (!tmp->vif)
1439 continue;
1440
1441 /*
1442 * The current mode switch would be exclusive, but
1443 * another context is active ... refuse the switch.
1444 */
1445 err = -EBUSY;
1446 goto out;
1447 }
1448 }
1449
1450 /* success */
1451 iwl_teardown_interface(priv, vif, true);
1452 vif->type = newviftype;
1453 vif->p2p = newp2p;
1454 err = iwl_setup_interface(priv, ctx);
1455 WARN_ON(err);
1456 /*
1457 * We've switched internally, but submitting to the
1458 * device may have failed for some reason. Mask this
1459 * error, because otherwise mac80211 will not switch
1460 * (and set the interface type back) and we'll be
1461 * out of sync with it.
1462 */
1463 err = 0;
1464
1465 out:
1466 mutex_unlock(&priv->mutex);
1467 IWL_DEBUG_MAC80211(priv, "leave\n");
1468
1469 return err;
1470 }
1471
iwlagn_mac_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct cfg80211_scan_request * req)1472 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1473 struct ieee80211_vif *vif,
1474 struct cfg80211_scan_request *req)
1475 {
1476 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1477 int ret;
1478
1479 IWL_DEBUG_MAC80211(priv, "enter\n");
1480
1481 if (req->n_channels == 0)
1482 return -EINVAL;
1483
1484 mutex_lock(&priv->mutex);
1485
1486 /*
1487 * If an internal scan is in progress, just set
1488 * up the scan_request as per above.
1489 */
1490 if (priv->scan_type != IWL_SCAN_NORMAL) {
1491 IWL_DEBUG_SCAN(priv,
1492 "SCAN request during internal scan - defer\n");
1493 priv->scan_request = req;
1494 priv->scan_vif = vif;
1495 ret = 0;
1496 } else {
1497 priv->scan_request = req;
1498 priv->scan_vif = vif;
1499 /*
1500 * mac80211 will only ask for one band at a time
1501 * so using channels[0] here is ok
1502 */
1503 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1504 req->channels[0]->band);
1505 if (ret) {
1506 priv->scan_request = NULL;
1507 priv->scan_vif = NULL;
1508 }
1509 }
1510
1511 IWL_DEBUG_MAC80211(priv, "leave\n");
1512
1513 mutex_unlock(&priv->mutex);
1514
1515 return ret;
1516 }
1517
iwl_sta_modify_ps_wake(struct iwl_priv * priv,int sta_id)1518 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1519 {
1520 struct iwl_addsta_cmd cmd = {
1521 .mode = STA_CONTROL_MODIFY_MSK,
1522 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1523 .sta.sta_id = sta_id,
1524 };
1525
1526 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1527 }
1528
iwlagn_mac_sta_notify(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum sta_notify_cmd cmd,struct ieee80211_sta * sta)1529 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1530 struct ieee80211_vif *vif,
1531 enum sta_notify_cmd cmd,
1532 struct ieee80211_sta *sta)
1533 {
1534 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1535 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1536 int sta_id;
1537
1538 IWL_DEBUG_MAC80211(priv, "enter\n");
1539
1540 switch (cmd) {
1541 case STA_NOTIFY_SLEEP:
1542 WARN_ON(!sta_priv->client);
1543 sta_priv->asleep = true;
1544 if (atomic_read(&sta_priv->pending_frames) > 0)
1545 ieee80211_sta_block_awake(hw, sta, true);
1546 break;
1547 case STA_NOTIFY_AWAKE:
1548 WARN_ON(!sta_priv->client);
1549 if (!sta_priv->asleep)
1550 break;
1551 sta_priv->asleep = false;
1552 sta_id = iwl_sta_id(sta);
1553 if (sta_id != IWL_INVALID_STATION)
1554 iwl_sta_modify_ps_wake(priv, sta_id);
1555 break;
1556 default:
1557 break;
1558 }
1559 IWL_DEBUG_MAC80211(priv, "leave\n");
1560 }
1561
1562 struct ieee80211_ops iwlagn_hw_ops = {
1563 .tx = iwlagn_mac_tx,
1564 .start = iwlagn_mac_start,
1565 .stop = iwlagn_mac_stop,
1566 #ifdef CONFIG_PM_SLEEP
1567 .suspend = iwlagn_mac_suspend,
1568 .resume = iwlagn_mac_resume,
1569 #endif
1570 .add_interface = iwlagn_mac_add_interface,
1571 .remove_interface = iwlagn_mac_remove_interface,
1572 .change_interface = iwlagn_mac_change_interface,
1573 .config = iwlagn_mac_config,
1574 .configure_filter = iwlagn_configure_filter,
1575 .set_key = iwlagn_mac_set_key,
1576 .update_tkip_key = iwlagn_mac_update_tkip_key,
1577 .set_rekey_data = iwlagn_mac_set_rekey_data,
1578 .conf_tx = iwlagn_mac_conf_tx,
1579 .bss_info_changed = iwlagn_bss_info_changed,
1580 .ampdu_action = iwlagn_mac_ampdu_action,
1581 .hw_scan = iwlagn_mac_hw_scan,
1582 .sta_notify = iwlagn_mac_sta_notify,
1583 .sta_state = iwlagn_mac_sta_state,
1584 .channel_switch = iwlagn_mac_channel_switch,
1585 .flush = iwlagn_mac_flush,
1586 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1587 .remain_on_channel = iwlagn_mac_remain_on_channel,
1588 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1589 .rssi_callback = iwlagn_mac_rssi_callback,
1590 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1591 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1592 .set_tim = iwlagn_mac_set_tim,
1593 };
1594
1595 /* This function both allocates and initializes hw and priv. */
iwl_alloc_all(void)1596 struct ieee80211_hw *iwl_alloc_all(void)
1597 {
1598 struct iwl_priv *priv;
1599 struct iwl_op_mode *op_mode;
1600 /* mac80211 allocates memory for this device instance, including
1601 * space for this driver's private structure */
1602 struct ieee80211_hw *hw;
1603
1604 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1605 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1606 if (!hw)
1607 goto out;
1608
1609 op_mode = hw->priv;
1610 priv = IWL_OP_MODE_GET_DVM(op_mode);
1611 priv->hw = hw;
1612
1613 out:
1614 return hw;
1615 }
1616