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1/******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 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 <linuxwifi@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/slab.h>
32#include <linux/dma-mapping.h>
33#include <linux/delay.h>
34#include <linux/sched.h>
35#include <linux/skbuff.h>
36#include <linux/netdevice.h>
37#include <linux/etherdevice.h>
38#include <linux/if_arp.h>
39
40#include <net/ieee80211_radiotap.h>
41#include <net/mac80211.h>
42
43#include <asm/div64.h>
44
45#include "iwl-io.h"
46#include "iwl-trans.h"
47#include "iwl-op-mode.h"
48#include "iwl-modparams.h"
49
50#include "dev.h"
51#include "calib.h"
52#include "agn.h"
53
54/*****************************************************************************
55 *
56 * mac80211 entry point functions
57 *
58 *****************************************************************************/
59
60static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
61 {
62 .max = 1,
63 .types = BIT(NL80211_IFTYPE_STATION),
64 },
65 {
66 .max = 1,
67 .types = BIT(NL80211_IFTYPE_AP),
68 },
69};
70
71static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
72 {
73 .max = 2,
74 .types = BIT(NL80211_IFTYPE_STATION),
75 },
76};
77
78static const struct ieee80211_iface_combination
79iwlagn_iface_combinations_dualmode[] = {
80 { .num_different_channels = 1,
81 .max_interfaces = 2,
82 .beacon_int_infra_match = true,
83 .limits = iwlagn_sta_ap_limits,
84 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
85 },
86 { .num_different_channels = 1,
87 .max_interfaces = 2,
88 .limits = iwlagn_2sta_limits,
89 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
90 },
91};
92
93/*
94 * Not a mac80211 entry point function, but it fits in with all the
95 * other mac80211 functions grouped here.
96 */
97int iwlagn_mac_setup_register(struct iwl_priv *priv,
98 const struct iwl_ucode_capabilities *capa)
99{
100 int ret;
101 struct ieee80211_hw *hw = priv->hw;
102 struct iwl_rxon_context *ctx;
103
104 hw->rate_control_algorithm = "iwl-agn-rs";
105
106 /* Tell mac80211 our characteristics */
107 ieee80211_hw_set(hw, SIGNAL_DBM);
108 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
109 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
110 ieee80211_hw_set(hw, SPECTRUM_MGMT);
111 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
112 ieee80211_hw_set(hw, QUEUE_CONTROL);
113 ieee80211_hw_set(hw, SUPPORTS_PS);
114 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
115 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
116 ieee80211_hw_set(hw, WANT_MONITOR_VIF);
117
118 if (priv->trans->max_skb_frags)
119 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
120
121 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
122 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
123
124 /*
125 * Including the following line will crash some AP's. This
126 * workaround removes the stimulus which causes the crash until
127 * the AP software can be fixed.
128 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
129 */
130
131 if (priv->nvm_data->sku_cap_11n_enable)
132 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
133 NL80211_FEATURE_STATIC_SMPS;
134
135 /*
136 * Enable 11w if advertised by firmware and software crypto
137 * is not enabled (as the firmware will interpret some mgmt
138 * packets, so enabling it with software crypto isn't safe)
139 */
140 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
141 !iwlwifi_mod_params.swcrypto)
142 ieee80211_hw_set(hw, MFP_CAPABLE);
143
144 hw->sta_data_size = sizeof(struct iwl_station_priv);
145 hw->vif_data_size = sizeof(struct iwl_vif_priv);
146
147 for_each_context(priv, ctx) {
148 hw->wiphy->interface_modes |= ctx->interface_modes;
149 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
150 }
151
152 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
153
154 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
155 hw->wiphy->iface_combinations =
156 iwlagn_iface_combinations_dualmode;
157 hw->wiphy->n_iface_combinations =
158 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
159 }
160
161 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
162 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
163 REGULATORY_DISABLE_BEACON_HINTS;
164
165#ifdef CONFIG_PM_SLEEP
166 if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec &&
167 priv->trans->ops->d3_suspend &&
168 priv->trans->ops->d3_resume &&
169 device_can_wakeup(priv->trans->dev)) {
170 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
171 WIPHY_WOWLAN_DISCONNECT |
172 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
173 WIPHY_WOWLAN_RFKILL_RELEASE;
174 if (!iwlwifi_mod_params.swcrypto)
175 priv->wowlan_support.flags |=
176 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
177 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
178
179 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
180 priv->wowlan_support.pattern_min_len =
181 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
182 priv->wowlan_support.pattern_max_len =
183 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
184 hw->wiphy->wowlan = &priv->wowlan_support;
185 }
186#endif
187
188 if (iwlwifi_mod_params.power_save)
189 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
190 else
191 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
192
193 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
194 /* we create the 802.11 header and a max-length SSID element */
195 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
196
197 /*
198 * We don't use all queues: 4 and 9 are unused and any
199 * aggregation queue gets mapped down to the AC queue.
200 */
201 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
202
203 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
204
205 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
206 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
207 &priv->nvm_data->bands[NL80211_BAND_2GHZ];
208 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
209 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
210 &priv->nvm_data->bands[NL80211_BAND_5GHZ];
211
212 hw->wiphy->hw_version = priv->trans->hw_id;
213
214 iwl_leds_init(priv);
215
216 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
217
218 ret = ieee80211_register_hw(priv->hw);
219 if (ret) {
220 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
221 iwl_leds_exit(priv);
222 return ret;
223 }
224 priv->mac80211_registered = 1;
225
226 return 0;
227}
228
229void iwlagn_mac_unregister(struct iwl_priv *priv)
230{
231 if (!priv->mac80211_registered)
232 return;
233 iwl_leds_exit(priv);
234 ieee80211_unregister_hw(priv->hw);
235 priv->mac80211_registered = 0;
236}
237
238static int __iwl_up(struct iwl_priv *priv)
239{
240 struct iwl_rxon_context *ctx;
241 int ret;
242
243 lockdep_assert_held(&priv->mutex);
244
245 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
246 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
247 return -EIO;
248 }
249
250 for_each_context(priv, ctx) {
251 ret = iwlagn_alloc_bcast_station(priv, ctx);
252 if (ret) {
253 iwl_dealloc_bcast_stations(priv);
254 return ret;
255 }
256 }
257
258 ret = iwl_trans_start_hw(priv->trans);
259 if (ret) {
260 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
261 goto error;
262 }
263
264 ret = iwl_run_init_ucode(priv);
265 if (ret) {
266 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
267 goto error;
268 }
269
270 ret = iwl_trans_start_hw(priv->trans);
271 if (ret) {
272 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
273 goto error;
274 }
275
276 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
277 if (ret) {
278 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
279 goto error;
280 }
281
282 ret = iwl_alive_start(priv);
283 if (ret)
284 goto error;
285 return 0;
286
287 error:
288 set_bit(STATUS_EXIT_PENDING, &priv->status);
289 iwl_down(priv);
290 clear_bit(STATUS_EXIT_PENDING, &priv->status);
291
292 IWL_ERR(priv, "Unable to initialize device.\n");
293 return ret;
294}
295
296static int iwlagn_mac_start(struct ieee80211_hw *hw)
297{
298 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
299 int ret;
300
301 IWL_DEBUG_MAC80211(priv, "enter\n");
302
303 /* we should be verifying the device is ready to be opened */
304 mutex_lock(&priv->mutex);
305 ret = __iwl_up(priv);
306 mutex_unlock(&priv->mutex);
307 if (ret)
308 return ret;
309
310 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
311
312 /* Now we should be done, and the READY bit should be set. */
313 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
314 ret = -EIO;
315
316 iwlagn_led_enable(priv);
317
318 priv->is_open = 1;
319 IWL_DEBUG_MAC80211(priv, "leave\n");
320 return 0;
321}
322
323static void iwlagn_mac_stop(struct ieee80211_hw *hw)
324{
325 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
326
327 IWL_DEBUG_MAC80211(priv, "enter\n");
328
329 if (!priv->is_open)
330 return;
331
332 priv->is_open = 0;
333
334 mutex_lock(&priv->mutex);
335 iwl_down(priv);
336 mutex_unlock(&priv->mutex);
337
338 iwl_cancel_deferred_work(priv);
339
340 flush_workqueue(priv->workqueue);
341
342 IWL_DEBUG_MAC80211(priv, "leave\n");
343}
344
345static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
346 struct ieee80211_vif *vif,
347 struct cfg80211_gtk_rekey_data *data)
348{
349 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
350
351 if (iwlwifi_mod_params.swcrypto)
352 return;
353
354 IWL_DEBUG_MAC80211(priv, "enter\n");
355 mutex_lock(&priv->mutex);
356
357 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
358 goto out;
359
360 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
361 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
362 priv->replay_ctr =
363 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
364 priv->have_rekey_data = true;
365
366 out:
367 mutex_unlock(&priv->mutex);
368 IWL_DEBUG_MAC80211(priv, "leave\n");
369}
370
371#ifdef CONFIG_PM_SLEEP
372
373static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
374 struct cfg80211_wowlan *wowlan)
375{
376 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
377 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
378 int ret;
379
380 if (WARN_ON(!wowlan))
381 return -EINVAL;
382
383 IWL_DEBUG_MAC80211(priv, "enter\n");
384 mutex_lock(&priv->mutex);
385
386 /* Don't attempt WoWLAN when not associated, tear down instead. */
387 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
388 !iwl_is_associated_ctx(ctx)) {
389 ret = 1;
390 goto out;
391 }
392
393 ret = iwlagn_suspend(priv, wowlan);
394 if (ret)
395 goto error;
396
397 /* let the ucode operate on its own */
398 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
399 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
400
401 iwl_trans_d3_suspend(priv->trans, false, true);
402
403 goto out;
404
405 error:
406 priv->wowlan = false;
407 iwlagn_prepare_restart(priv);
408 ieee80211_restart_hw(priv->hw);
409 out:
410 mutex_unlock(&priv->mutex);
411 IWL_DEBUG_MAC80211(priv, "leave\n");
412
413 return ret;
414}
415
416struct iwl_resume_data {
417 struct iwl_priv *priv;
418 struct iwlagn_wowlan_status *cmd;
419 bool valid;
420};
421
422static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
423 struct iwl_rx_packet *pkt, void *data)
424{
425 struct iwl_resume_data *resume_data = data;
426 struct iwl_priv *priv = resume_data->priv;
427
428 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
429 IWL_ERR(priv, "rx wrong size data\n");
430 return true;
431 }
432 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
433 resume_data->valid = true;
434
435 return true;
436}
437
438static int iwlagn_mac_resume(struct ieee80211_hw *hw)
439{
440 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
441 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
442 struct ieee80211_vif *vif;
443 u32 base;
444 int ret;
445 enum iwl_d3_status d3_status;
446 struct error_table_start {
447 /* cf. struct iwl_error_event_table */
448 u32 valid;
449 u32 error_id;
450 } err_info;
451 struct iwl_notification_wait status_wait;
452 static const u16 status_cmd[] = {
453 REPLY_WOWLAN_GET_STATUS,
454 };
455 struct iwlagn_wowlan_status status_data = {};
456 struct iwl_resume_data resume_data = {
457 .priv = priv,
458 .cmd = &status_data,
459 .valid = false,
460 };
461 struct cfg80211_wowlan_wakeup wakeup = {
462 .pattern_idx = -1,
463 };
464#ifdef CONFIG_IWLWIFI_DEBUGFS
465 const struct fw_img *img;
466#endif
467
468 IWL_DEBUG_MAC80211(priv, "enter\n");
469 mutex_lock(&priv->mutex);
470
471 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
472 vif = ctx->vif;
473
474 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
475 if (ret)
476 goto out_unlock;
477
478 if (d3_status != IWL_D3_STATUS_ALIVE) {
479 IWL_INFO(priv, "Device was reset during suspend\n");
480 goto out_unlock;
481 }
482
483 /* uCode is no longer operating by itself */
484 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
485 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
486
487 base = priv->device_pointers.error_event_table;
488 if (!iwlagn_hw_valid_rtc_data_addr(base)) {
489 IWL_WARN(priv, "Invalid error table during resume!\n");
490 goto out_unlock;
491 }
492
493 iwl_trans_read_mem_bytes(priv->trans, base,
494 &err_info, sizeof(err_info));
495
496 if (err_info.valid) {
497 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
498 err_info.valid, err_info.error_id);
499 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
500 wakeup.rfkill_release = true;
501 ieee80211_report_wowlan_wakeup(vif, &wakeup,
502 GFP_KERNEL);
503 }
504 goto out_unlock;
505 }
506
507#ifdef CONFIG_IWLWIFI_DEBUGFS
508 img = &priv->fw->img[IWL_UCODE_WOWLAN];
509 if (!priv->wowlan_sram)
510 priv->wowlan_sram =
511 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
512 GFP_KERNEL);
513
514 if (priv->wowlan_sram)
515 iwl_trans_read_mem(priv->trans, 0x800000,
516 priv->wowlan_sram,
517 img->sec[IWL_UCODE_SECTION_DATA].len / 4);
518#endif
519
520 /*
521 * This is very strange. The GET_STATUS command is sent but the device
522 * doesn't reply properly, it seems it doesn't close the RBD so one is
523 * always left open ... As a result, we need to send another command
524 * and have to reset the driver afterwards. As we need to switch to
525 * runtime firmware again that'll happen.
526 */
527
528 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
529 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
530 &resume_data);
531
532 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
533 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
534 /* an RBD is left open in the firmware now! */
535
536 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
537 if (ret)
538 goto out_unlock;
539
540 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
541 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
542 struct cfg80211_wowlan_wakeup *wakeup_report;
543
544 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
545
546 if (reasons) {
547 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
548 wakeup.magic_pkt = true;
549 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
550 wakeup.pattern_idx = status_data.pattern_number;
551 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
552 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
553 wakeup.disconnect = true;
554 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
555 wakeup.gtk_rekey_failure = true;
556 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
557 wakeup.eap_identity_req = true;
558 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
559 wakeup.four_way_handshake = true;
560 wakeup_report = &wakeup;
561 } else {
562 wakeup_report = NULL;
563 }
564
565 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
566 }
567
568 priv->wowlan = false;
569
570 iwlagn_prepare_restart(priv);
571
572 memset((void *)&ctx->active, 0, sizeof(ctx->active));
573 iwl_connection_init_rx_config(priv, ctx);
574 iwlagn_set_rxon_chain(priv, ctx);
575
576 out_unlock:
577 mutex_unlock(&priv->mutex);
578 IWL_DEBUG_MAC80211(priv, "leave\n");
579
580 ieee80211_resume_disconnect(vif);
581
582 return 1;
583}
584
585static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
586{
587 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
588
589 device_set_wakeup_enable(priv->trans->dev, enabled);
590}
591#endif
592
593static void iwlagn_mac_tx(struct ieee80211_hw *hw,
594 struct ieee80211_tx_control *control,
595 struct sk_buff *skb)
596{
597 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
598
599 if (iwlagn_tx_skb(priv, control->sta, skb))
600 ieee80211_free_txskb(hw, skb);
601}
602
603static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
604 struct ieee80211_vif *vif,
605 struct ieee80211_key_conf *keyconf,
606 struct ieee80211_sta *sta,
607 u32 iv32, u16 *phase1key)
608{
609 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
610
611 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
612}
613
614static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
615 struct ieee80211_vif *vif,
616 struct ieee80211_sta *sta,
617 struct ieee80211_key_conf *key)
618{
619 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
620 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
621 struct iwl_rxon_context *ctx = vif_priv->ctx;
622 int ret;
623 bool is_default_wep_key = false;
624
625 IWL_DEBUG_MAC80211(priv, "enter\n");
626
627 if (iwlwifi_mod_params.swcrypto) {
628 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
629 return -EOPNOTSUPP;
630 }
631
632 switch (key->cipher) {
633 case WLAN_CIPHER_SUITE_TKIP:
634 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
635 /* fall through */
636 case WLAN_CIPHER_SUITE_CCMP:
637 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
638 break;
639 default:
640 break;
641 }
642
643 /*
644 * We could program these keys into the hardware as well, but we
645 * don't expect much multicast traffic in IBSS and having keys
646 * for more stations is probably more useful.
647 *
648 * Mark key TX-only and return 0.
649 */
650 if (vif->type == NL80211_IFTYPE_ADHOC &&
651 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
652 key->hw_key_idx = WEP_INVALID_OFFSET;
653 return 0;
654 }
655
656 /* If they key was TX-only, accept deletion */
657 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
658 return 0;
659
660 mutex_lock(&priv->mutex);
661 iwl_scan_cancel_timeout(priv, 100);
662
663 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
664
665 /*
666 * If we are getting WEP group key and we didn't receive any key mapping
667 * so far, we are in legacy wep mode (group key only), otherwise we are
668 * in 1X mode.
669 * In legacy wep mode, we use another host command to the uCode.
670 */
671 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
672 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
673 if (cmd == SET_KEY)
674 is_default_wep_key = !ctx->key_mapping_keys;
675 else
676 is_default_wep_key =
677 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
678 }
679
680
681 switch (cmd) {
682 case SET_KEY:
683 if (is_default_wep_key) {
684 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
685 break;
686 }
687 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
688 if (ret) {
689 /*
690 * can't add key for RX, but we don't need it
691 * in the device for TX so still return 0
692 */
693 ret = 0;
694 key->hw_key_idx = WEP_INVALID_OFFSET;
695 }
696
697 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
698 break;
699 case DISABLE_KEY:
700 if (is_default_wep_key)
701 ret = iwl_remove_default_wep_key(priv, ctx, key);
702 else
703 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
704
705 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
706 break;
707 default:
708 ret = -EINVAL;
709 }
710
711 mutex_unlock(&priv->mutex);
712 IWL_DEBUG_MAC80211(priv, "leave\n");
713
714 return ret;
715}
716
717static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
718{
719 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
720 return false;
721 return true;
722}
723
724static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
725{
726 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
727 return false;
728 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
729 return true;
730
731 /* disabled by default */
732 return false;
733}
734
735static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
736 struct ieee80211_vif *vif,
737 struct ieee80211_ampdu_params *params)
738{
739 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
740 int ret = -EINVAL;
741 struct ieee80211_sta *sta = params->sta;
742 enum ieee80211_ampdu_mlme_action action = params->action;
743 u16 tid = params->tid;
744 u16 *ssn = ¶ms->ssn;
745 u8 buf_size = params->buf_size;
746 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
747
748 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
749 sta->addr, tid);
750
751 if (!(priv->nvm_data->sku_cap_11n_enable))
752 return -EACCES;
753
754 IWL_DEBUG_MAC80211(priv, "enter\n");
755 mutex_lock(&priv->mutex);
756
757 switch (action) {
758 case IEEE80211_AMPDU_RX_START:
759 if (!iwl_enable_rx_ampdu(priv->cfg))
760 break;
761 IWL_DEBUG_HT(priv, "start Rx\n");
762 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
763 break;
764 case IEEE80211_AMPDU_RX_STOP:
765 IWL_DEBUG_HT(priv, "stop Rx\n");
766 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
767 break;
768 case IEEE80211_AMPDU_TX_START:
769 if (!priv->trans->ops->txq_enable)
770 break;
771 if (!iwl_enable_tx_ampdu(priv->cfg))
772 break;
773 IWL_DEBUG_HT(priv, "start Tx\n");
774 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
775 break;
776 case IEEE80211_AMPDU_TX_STOP_FLUSH:
777 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
778 IWL_DEBUG_HT(priv, "Flush Tx\n");
779 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
780 break;
781 case IEEE80211_AMPDU_TX_STOP_CONT:
782 IWL_DEBUG_HT(priv, "stop Tx\n");
783 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
784 if ((ret == 0) && (priv->agg_tids_count > 0)) {
785 priv->agg_tids_count--;
786 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
787 priv->agg_tids_count);
788 }
789 if (!priv->agg_tids_count &&
790 priv->hw_params.use_rts_for_aggregation) {
791 /*
792 * switch off RTS/CTS if it was previously enabled
793 */
794 sta_priv->lq_sta.lq.general_params.flags &=
795 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
796 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
797 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
798 }
799 break;
800 case IEEE80211_AMPDU_TX_OPERATIONAL:
801 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
802 break;
803 }
804 mutex_unlock(&priv->mutex);
805 IWL_DEBUG_MAC80211(priv, "leave\n");
806 return ret;
807}
808
809static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
810 struct ieee80211_vif *vif,
811 struct ieee80211_sta *sta)
812{
813 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
814 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
815 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
816 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
817 int ret;
818 u8 sta_id;
819
820 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
821 sta->addr);
822 sta_priv->sta_id = IWL_INVALID_STATION;
823
824 atomic_set(&sta_priv->pending_frames, 0);
825 if (vif->type == NL80211_IFTYPE_AP)
826 sta_priv->client = true;
827
828 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
829 is_ap, sta, &sta_id);
830 if (ret) {
831 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
832 sta->addr, ret);
833 /* Should we return success if return code is EEXIST ? */
834 return ret;
835 }
836
837 sta_priv->sta_id = sta_id;
838
839 return 0;
840}
841
842static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
843 struct ieee80211_vif *vif,
844 struct ieee80211_sta *sta)
845{
846 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
847 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
848 int ret;
849
850 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
851
852 if (vif->type == NL80211_IFTYPE_STATION) {
853 /*
854 * Station will be removed from device when the RXON
855 * is set to unassociated -- just deactivate it here
856 * to avoid re-programming it.
857 */
858 ret = 0;
859 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
860 } else {
861 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
862 if (ret)
863 IWL_DEBUG_QUIET_RFKILL(priv,
864 "Error removing station %pM\n", sta->addr);
865 }
866 return ret;
867}
868
869static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
870 struct ieee80211_vif *vif,
871 struct ieee80211_sta *sta,
872 enum ieee80211_sta_state old_state,
873 enum ieee80211_sta_state new_state)
874{
875 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
876 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
877 enum {
878 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
879 } op = NONE;
880 int ret;
881
882 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
883 sta->addr, old_state, new_state);
884
885 mutex_lock(&priv->mutex);
886 if (vif->type == NL80211_IFTYPE_STATION) {
887 if (old_state == IEEE80211_STA_NOTEXIST &&
888 new_state == IEEE80211_STA_NONE)
889 op = ADD;
890 else if (old_state == IEEE80211_STA_NONE &&
891 new_state == IEEE80211_STA_NOTEXIST)
892 op = REMOVE;
893 else if (old_state == IEEE80211_STA_AUTH &&
894 new_state == IEEE80211_STA_ASSOC)
895 op = HT_RATE_INIT;
896 } else {
897 if (old_state == IEEE80211_STA_AUTH &&
898 new_state == IEEE80211_STA_ASSOC)
899 op = ADD_RATE_INIT;
900 else if (old_state == IEEE80211_STA_ASSOC &&
901 new_state == IEEE80211_STA_AUTH)
902 op = REMOVE;
903 }
904
905 switch (op) {
906 case ADD:
907 ret = iwlagn_mac_sta_add(hw, vif, sta);
908 if (ret)
909 break;
910 /*
911 * Clear the in-progress flag, the AP station entry was added
912 * but we'll initialize LQ only when we've associated (which
913 * would also clear the in-progress flag). This is necessary
914 * in case we never initialize LQ because association fails.
915 */
916 spin_lock_bh(&priv->sta_lock);
917 priv->stations[iwl_sta_id(sta)].used &=
918 ~IWL_STA_UCODE_INPROGRESS;
919 spin_unlock_bh(&priv->sta_lock);
920 break;
921 case REMOVE:
922 ret = iwlagn_mac_sta_remove(hw, vif, sta);
923 break;
924 case ADD_RATE_INIT:
925 ret = iwlagn_mac_sta_add(hw, vif, sta);
926 if (ret)
927 break;
928 /* Initialize rate scaling */
929 IWL_DEBUG_INFO(priv,
930 "Initializing rate scaling for station %pM\n",
931 sta->addr);
932 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
933 ret = 0;
934 break;
935 case HT_RATE_INIT:
936 /* Initialize rate scaling */
937 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
938 if (ret)
939 break;
940 IWL_DEBUG_INFO(priv,
941 "Initializing rate scaling for station %pM\n",
942 sta->addr);
943 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
944 ret = 0;
945 break;
946 default:
947 ret = 0;
948 break;
949 }
950
951 /*
952 * mac80211 might WARN if we fail, but due the way we
953 * (badly) handle hard rfkill, we might fail here
954 */
955 if (iwl_is_rfkill(priv))
956 ret = 0;
957
958 mutex_unlock(&priv->mutex);
959 IWL_DEBUG_MAC80211(priv, "leave\n");
960
961 return ret;
962}
963
964static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
965 struct ieee80211_vif *vif,
966 struct ieee80211_channel_switch *ch_switch)
967{
968 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
969 struct ieee80211_conf *conf = &hw->conf;
970 struct ieee80211_channel *channel = ch_switch->chandef.chan;
971 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
972 /*
973 * MULTI-FIXME
974 * When we add support for multiple interfaces, we need to
975 * revisit this. The channel switch command in the device
976 * only affects the BSS context, but what does that really
977 * mean? And what if we get a CSA on the second interface?
978 * This needs a lot of work.
979 */
980 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
981 u16 ch;
982
983 IWL_DEBUG_MAC80211(priv, "enter\n");
984
985 mutex_lock(&priv->mutex);
986
987 if (iwl_is_rfkill(priv))
988 goto out;
989
990 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
991 test_bit(STATUS_SCANNING, &priv->status) ||
992 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
993 goto out;
994
995 if (!iwl_is_associated_ctx(ctx))
996 goto out;
997
998 if (!priv->lib->set_channel_switch)
999 goto out;
1000
1001 ch = channel->hw_value;
1002 if (le16_to_cpu(ctx->active.channel) == ch)
1003 goto out;
1004
1005 priv->current_ht_config.smps = conf->smps_mode;
1006
1007 /* Configure HT40 channels */
1008 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
1009 case NL80211_CHAN_NO_HT:
1010 case NL80211_CHAN_HT20:
1011 ctx->ht.is_40mhz = false;
1012 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1013 break;
1014 case NL80211_CHAN_HT40MINUS:
1015 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1016 ctx->ht.is_40mhz = true;
1017 break;
1018 case NL80211_CHAN_HT40PLUS:
1019 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1020 ctx->ht.is_40mhz = true;
1021 break;
1022 }
1023
1024 if ((le16_to_cpu(ctx->staging.channel) != ch))
1025 ctx->staging.flags = 0;
1026
1027 iwl_set_rxon_channel(priv, channel, ctx);
1028 iwl_set_rxon_ht(priv, ht_conf);
1029 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1030
1031 /*
1032 * at this point, staging_rxon has the
1033 * configuration for channel switch
1034 */
1035 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1036 priv->switch_channel = cpu_to_le16(ch);
1037 if (priv->lib->set_channel_switch(priv, ch_switch)) {
1038 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1039 priv->switch_channel = 0;
1040 ieee80211_chswitch_done(ctx->vif, false);
1041 }
1042
1043out:
1044 mutex_unlock(&priv->mutex);
1045 IWL_DEBUG_MAC80211(priv, "leave\n");
1046}
1047
1048void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1049{
1050 /*
1051 * MULTI-FIXME
1052 * See iwlagn_mac_channel_switch.
1053 */
1054 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1055
1056 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1057 return;
1058
1059 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1060 return;
1061
1062 if (ctx->vif)
1063 ieee80211_chswitch_done(ctx->vif, is_success);
1064}
1065
1066static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1067 unsigned int changed_flags,
1068 unsigned int *total_flags,
1069 u64 multicast)
1070{
1071 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1072 __le32 filter_or = 0, filter_nand = 0;
1073 struct iwl_rxon_context *ctx;
1074
1075#define CHK(test, flag) do { \
1076 if (*total_flags & (test)) \
1077 filter_or |= (flag); \
1078 else \
1079 filter_nand |= (flag); \
1080 } while (0)
1081
1082 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1083 changed_flags, *total_flags);
1084
1085 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1086 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1087 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1088 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1089
1090#undef CHK
1091
1092 mutex_lock(&priv->mutex);
1093
1094 for_each_context(priv, ctx) {
1095 ctx->staging.filter_flags &= ~filter_nand;
1096 ctx->staging.filter_flags |= filter_or;
1097
1098 /*
1099 * Not committing directly because hardware can perform a scan,
1100 * but we'll eventually commit the filter flags change anyway.
1101 */
1102 }
1103
1104 mutex_unlock(&priv->mutex);
1105
1106 /*
1107 * Receiving all multicast frames is always enabled by the
1108 * default flags setup in iwl_connection_init_rx_config()
1109 * since we currently do not support programming multicast
1110 * filters into the device.
1111 */
1112 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1113 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1114}
1115
1116static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1117 u32 queues, bool drop)
1118{
1119 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1120 u32 scd_queues;
1121
1122 mutex_lock(&priv->mutex);
1123 IWL_DEBUG_MAC80211(priv, "enter\n");
1124
1125 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1126 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1127 goto done;
1128 }
1129 if (iwl_is_rfkill(priv)) {
1130 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1131 goto done;
1132 }
1133
1134 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
1135 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1136 BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1137
1138 if (drop) {
1139 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1140 scd_queues);
1141 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1142 IWL_ERR(priv, "flush request fail\n");
1143 goto done;
1144 }
1145 }
1146
1147 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1148 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1149done:
1150 mutex_unlock(&priv->mutex);
1151 IWL_DEBUG_MAC80211(priv, "leave\n");
1152}
1153
1154static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1155 struct ieee80211_vif *vif,
1156 const struct ieee80211_event *event)
1157{
1158 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1159
1160 if (event->type != RSSI_EVENT)
1161 return;
1162
1163 IWL_DEBUG_MAC80211(priv, "enter\n");
1164
1165 if (priv->lib->bt_params &&
1166 priv->lib->bt_params->advanced_bt_coexist) {
1167 if (event->u.rssi.data == RSSI_EVENT_LOW)
1168 priv->bt_enable_pspoll = true;
1169 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1170 priv->bt_enable_pspoll = false;
1171
1172 queue_work(priv->workqueue, &priv->bt_runtime_config);
1173 } else {
1174 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1175 "ignoring RSSI callback\n");
1176 }
1177
1178 IWL_DEBUG_MAC80211(priv, "leave\n");
1179}
1180
1181static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1182 struct ieee80211_sta *sta, bool set)
1183{
1184 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1185
1186 queue_work(priv->workqueue, &priv->beacon_update);
1187
1188 return 0;
1189}
1190
1191static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1192 struct ieee80211_vif *vif, u16 queue,
1193 const struct ieee80211_tx_queue_params *params)
1194{
1195 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1196 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1197 struct iwl_rxon_context *ctx = vif_priv->ctx;
1198 int q;
1199
1200 if (WARN_ON(!ctx))
1201 return -EINVAL;
1202
1203 IWL_DEBUG_MAC80211(priv, "enter\n");
1204
1205 if (!iwl_is_ready_rf(priv)) {
1206 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1207 return -EIO;
1208 }
1209
1210 if (queue >= AC_NUM) {
1211 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1212 return 0;
1213 }
1214
1215 q = AC_NUM - 1 - queue;
1216
1217 mutex_lock(&priv->mutex);
1218
1219 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1220 cpu_to_le16(params->cw_min);
1221 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1222 cpu_to_le16(params->cw_max);
1223 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1224 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1225 cpu_to_le16((params->txop * 32));
1226
1227 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1228
1229 mutex_unlock(&priv->mutex);
1230
1231 IWL_DEBUG_MAC80211(priv, "leave\n");
1232 return 0;
1233}
1234
1235static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1236{
1237 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1238
1239 return priv->ibss_manager == IWL_IBSS_MANAGER;
1240}
1241
1242static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1243{
1244 iwl_connection_init_rx_config(priv, ctx);
1245
1246 iwlagn_set_rxon_chain(priv, ctx);
1247
1248 return iwlagn_commit_rxon(priv, ctx);
1249}
1250
1251static int iwl_setup_interface(struct iwl_priv *priv,
1252 struct iwl_rxon_context *ctx)
1253{
1254 struct ieee80211_vif *vif = ctx->vif;
1255 int err, ac;
1256
1257 lockdep_assert_held(&priv->mutex);
1258
1259 /*
1260 * This variable will be correct only when there's just
1261 * a single context, but all code using it is for hardware
1262 * that supports only one context.
1263 */
1264 priv->iw_mode = vif->type;
1265
1266 ctx->is_active = true;
1267
1268 err = iwl_set_mode(priv, ctx);
1269 if (err) {
1270 if (!ctx->always_active)
1271 ctx->is_active = false;
1272 return err;
1273 }
1274
1275 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1276 vif->type == NL80211_IFTYPE_ADHOC) {
1277 /*
1278 * pretend to have high BT traffic as long as we
1279 * are operating in IBSS mode, as this will cause
1280 * the rate scaling etc. to behave as intended.
1281 */
1282 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1283 }
1284
1285 /* set up queue mappings */
1286 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1287 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1288
1289 if (vif->type == NL80211_IFTYPE_AP)
1290 vif->cab_queue = ctx->mcast_queue;
1291 else
1292 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1293
1294 return 0;
1295}
1296
1297static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1298 struct ieee80211_vif *vif)
1299{
1300 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1301 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1302 struct iwl_rxon_context *tmp, *ctx = NULL;
1303 int err;
1304 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1305 bool reset = false;
1306
1307 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1308 viftype, vif->addr);
1309
1310 mutex_lock(&priv->mutex);
1311
1312 if (!iwl_is_ready_rf(priv)) {
1313 IWL_WARN(priv, "Try to add interface when device not ready\n");
1314 err = -EINVAL;
1315 goto out;
1316 }
1317
1318 for_each_context(priv, tmp) {
1319 u32 possible_modes =
1320 tmp->interface_modes | tmp->exclusive_interface_modes;
1321
1322 if (tmp->vif) {
1323 /* On reset we need to add the same interface again */
1324 if (tmp->vif == vif) {
1325 reset = true;
1326 ctx = tmp;
1327 break;
1328 }
1329
1330 /* check if this busy context is exclusive */
1331 if (tmp->exclusive_interface_modes &
1332 BIT(tmp->vif->type)) {
1333 err = -EINVAL;
1334 goto out;
1335 }
1336 continue;
1337 }
1338
1339 if (!(possible_modes & BIT(viftype)))
1340 continue;
1341
1342 /* have maybe usable context w/o interface */
1343 ctx = tmp;
1344 break;
1345 }
1346
1347 if (!ctx) {
1348 err = -EOPNOTSUPP;
1349 goto out;
1350 }
1351
1352 vif_priv->ctx = ctx;
1353 ctx->vif = vif;
1354
1355 /*
1356 * In SNIFFER device type, the firmware reports the FCS to
1357 * the host, rather than snipping it off. Unfortunately,
1358 * mac80211 doesn't (yet) provide a per-packet flag for
1359 * this, so that we have to set the hardware flag based
1360 * on the interfaces added. As the monitor interface can
1361 * only be present by itself, and will be removed before
1362 * other interfaces are added, this is safe.
1363 */
1364 if (vif->type == NL80211_IFTYPE_MONITOR)
1365 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1366 else
1367 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1368
1369 err = iwl_setup_interface(priv, ctx);
1370 if (!err || reset)
1371 goto out;
1372
1373 ctx->vif = NULL;
1374 priv->iw_mode = NL80211_IFTYPE_STATION;
1375 out:
1376 mutex_unlock(&priv->mutex);
1377
1378 IWL_DEBUG_MAC80211(priv, "leave\n");
1379 return err;
1380}
1381
1382static void iwl_teardown_interface(struct iwl_priv *priv,
1383 struct ieee80211_vif *vif,
1384 bool mode_change)
1385{
1386 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1387
1388 lockdep_assert_held(&priv->mutex);
1389
1390 if (priv->scan_vif == vif) {
1391 iwl_scan_cancel_timeout(priv, 200);
1392 iwl_force_scan_end(priv);
1393 }
1394
1395 if (!mode_change) {
1396 iwl_set_mode(priv, ctx);
1397 if (!ctx->always_active)
1398 ctx->is_active = false;
1399 }
1400
1401 /*
1402 * When removing the IBSS interface, overwrite the
1403 * BT traffic load with the stored one from the last
1404 * notification, if any. If this is a device that
1405 * doesn't implement this, this has no effect since
1406 * both values are the same and zero.
1407 */
1408 if (vif->type == NL80211_IFTYPE_ADHOC)
1409 priv->bt_traffic_load = priv->last_bt_traffic_load;
1410}
1411
1412static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1413 struct ieee80211_vif *vif)
1414{
1415 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1416 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1417
1418 IWL_DEBUG_MAC80211(priv, "enter\n");
1419
1420 mutex_lock(&priv->mutex);
1421
1422 WARN_ON(ctx->vif != vif);
1423 ctx->vif = NULL;
1424
1425 iwl_teardown_interface(priv, vif, false);
1426
1427 mutex_unlock(&priv->mutex);
1428
1429 IWL_DEBUG_MAC80211(priv, "leave\n");
1430
1431}
1432
1433static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1434 struct ieee80211_vif *vif,
1435 enum nl80211_iftype newtype, bool newp2p)
1436{
1437 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1438 struct iwl_rxon_context *ctx, *tmp;
1439 enum nl80211_iftype newviftype = newtype;
1440 u32 interface_modes;
1441 int err;
1442
1443 IWL_DEBUG_MAC80211(priv, "enter\n");
1444
1445 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1446
1447 mutex_lock(&priv->mutex);
1448
1449 ctx = iwl_rxon_ctx_from_vif(vif);
1450
1451 /*
1452 * To simplify this code, only support changes on the
1453 * BSS context. The PAN context is usually reassigned
1454 * by creating/removing P2P interfaces anyway.
1455 */
1456 if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1457 err = -EBUSY;
1458 goto out;
1459 }
1460
1461 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1462 /*
1463 * Huh? But wait ... this can maybe happen when
1464 * we're in the middle of a firmware restart!
1465 */
1466 err = -EBUSY;
1467 goto out;
1468 }
1469
1470 /* Check if the switch is supported in the same context */
1471 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1472 if (!(interface_modes & BIT(newtype))) {
1473 err = -EBUSY;
1474 goto out;
1475 }
1476
1477 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1478 for_each_context(priv, tmp) {
1479 if (ctx == tmp)
1480 continue;
1481
1482 if (!tmp->is_active)
1483 continue;
1484
1485 /*
1486 * The current mode switch would be exclusive, but
1487 * another context is active ... refuse the switch.
1488 */
1489 err = -EBUSY;
1490 goto out;
1491 }
1492 }
1493
1494 /* success */
1495 iwl_teardown_interface(priv, vif, true);
1496 vif->type = newviftype;
1497 vif->p2p = newp2p;
1498 err = iwl_setup_interface(priv, ctx);
1499 WARN_ON(err);
1500 /*
1501 * We've switched internally, but submitting to the
1502 * device may have failed for some reason. Mask this
1503 * error, because otherwise mac80211 will not switch
1504 * (and set the interface type back) and we'll be
1505 * out of sync with it.
1506 */
1507 err = 0;
1508
1509 out:
1510 mutex_unlock(&priv->mutex);
1511 IWL_DEBUG_MAC80211(priv, "leave\n");
1512
1513 return err;
1514}
1515
1516static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1517 struct ieee80211_vif *vif,
1518 struct ieee80211_scan_request *hw_req)
1519{
1520 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1521 struct cfg80211_scan_request *req = &hw_req->req;
1522 int ret;
1523
1524 IWL_DEBUG_MAC80211(priv, "enter\n");
1525
1526 if (req->n_channels == 0)
1527 return -EINVAL;
1528
1529 mutex_lock(&priv->mutex);
1530
1531 /*
1532 * If an internal scan is in progress, just set
1533 * up the scan_request as per above.
1534 */
1535 if (priv->scan_type != IWL_SCAN_NORMAL) {
1536 IWL_DEBUG_SCAN(priv,
1537 "SCAN request during internal scan - defer\n");
1538 priv->scan_request = req;
1539 priv->scan_vif = vif;
1540 ret = 0;
1541 } else {
1542 priv->scan_request = req;
1543 priv->scan_vif = vif;
1544 /*
1545 * mac80211 will only ask for one band at a time
1546 * so using channels[0] here is ok
1547 */
1548 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1549 req->channels[0]->band);
1550 if (ret) {
1551 priv->scan_request = NULL;
1552 priv->scan_vif = NULL;
1553 }
1554 }
1555
1556 IWL_DEBUG_MAC80211(priv, "leave\n");
1557
1558 mutex_unlock(&priv->mutex);
1559
1560 return ret;
1561}
1562
1563static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1564{
1565 struct iwl_addsta_cmd cmd = {
1566 .mode = STA_CONTROL_MODIFY_MSK,
1567 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1568 .sta.sta_id = sta_id,
1569 };
1570
1571 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1572}
1573
1574static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1575 struct ieee80211_vif *vif,
1576 enum sta_notify_cmd cmd,
1577 struct ieee80211_sta *sta)
1578{
1579 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1580 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1581 int sta_id;
1582
1583 IWL_DEBUG_MAC80211(priv, "enter\n");
1584
1585 switch (cmd) {
1586 case STA_NOTIFY_SLEEP:
1587 WARN_ON(!sta_priv->client);
1588 sta_priv->asleep = true;
1589 if (atomic_read(&sta_priv->pending_frames) > 0)
1590 ieee80211_sta_block_awake(hw, sta, true);
1591 break;
1592 case STA_NOTIFY_AWAKE:
1593 WARN_ON(!sta_priv->client);
1594 if (!sta_priv->asleep)
1595 break;
1596 sta_priv->asleep = false;
1597 sta_id = iwl_sta_id(sta);
1598 if (sta_id != IWL_INVALID_STATION)
1599 iwl_sta_modify_ps_wake(priv, sta_id);
1600 break;
1601 default:
1602 break;
1603 }
1604 IWL_DEBUG_MAC80211(priv, "leave\n");
1605}
1606
1607const struct ieee80211_ops iwlagn_hw_ops = {
1608 .tx = iwlagn_mac_tx,
1609 .start = iwlagn_mac_start,
1610 .stop = iwlagn_mac_stop,
1611#ifdef CONFIG_PM_SLEEP
1612 .suspend = iwlagn_mac_suspend,
1613 .resume = iwlagn_mac_resume,
1614 .set_wakeup = iwlagn_mac_set_wakeup,
1615#endif
1616 .add_interface = iwlagn_mac_add_interface,
1617 .remove_interface = iwlagn_mac_remove_interface,
1618 .change_interface = iwlagn_mac_change_interface,
1619 .config = iwlagn_mac_config,
1620 .configure_filter = iwlagn_configure_filter,
1621 .set_key = iwlagn_mac_set_key,
1622 .update_tkip_key = iwlagn_mac_update_tkip_key,
1623 .set_rekey_data = iwlagn_mac_set_rekey_data,
1624 .conf_tx = iwlagn_mac_conf_tx,
1625 .bss_info_changed = iwlagn_bss_info_changed,
1626 .ampdu_action = iwlagn_mac_ampdu_action,
1627 .hw_scan = iwlagn_mac_hw_scan,
1628 .sta_notify = iwlagn_mac_sta_notify,
1629 .sta_state = iwlagn_mac_sta_state,
1630 .channel_switch = iwlagn_mac_channel_switch,
1631 .flush = iwlagn_mac_flush,
1632 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1633 .event_callback = iwlagn_mac_event_callback,
1634 .set_tim = iwlagn_mac_set_tim,
1635};
1636
1637/* This function both allocates and initializes hw and priv. */
1638struct ieee80211_hw *iwl_alloc_all(void)
1639{
1640 struct iwl_priv *priv;
1641 struct iwl_op_mode *op_mode;
1642 /* mac80211 allocates memory for this device instance, including
1643 * space for this driver's private structure */
1644 struct ieee80211_hw *hw;
1645
1646 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1647 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1648 if (!hw)
1649 goto out;
1650
1651 op_mode = hw->priv;
1652 priv = IWL_OP_MODE_GET_DVM(op_mode);
1653 priv->hw = hw;
1654
1655out:
1656 return hw;
1657}