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Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-mac80211.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-mac80211.c1632
1 files changed, 1632 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-mac80211.c b/drivers/net/wireless/iwlwifi/iwl-mac80211.c
new file mode 100644
index 000000000000..05b1f0d2f387
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-mac80211.c
@@ -0,0 +1,1632 @@
1/******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 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/firmware.h>
39#include <linux/etherdevice.h>
40#include <linux/if_arp.h>
41
42#include <net/mac80211.h>
43
44#include <asm/div64.h>
45
46#include "iwl-eeprom.h"
47#include "iwl-dev.h"
48#include "iwl-core.h"
49#include "iwl-io.h"
50#include "iwl-agn-calib.h"
51#include "iwl-agn.h"
52#include "iwl-shared.h"
53#include "iwl-bus.h"
54#include "iwl-trans.h"
55
56/*****************************************************************************
57 *
58 * mac80211 entry point functions
59 *
60 *****************************************************************************/
61
62static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
63 {
64 .max = 1,
65 .types = BIT(NL80211_IFTYPE_STATION),
66 },
67 {
68 .max = 1,
69 .types = BIT(NL80211_IFTYPE_AP),
70 },
71};
72
73static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
74 {
75 .max = 2,
76 .types = BIT(NL80211_IFTYPE_STATION),
77 },
78};
79
80static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
81 {
82 .max = 1,
83 .types = BIT(NL80211_IFTYPE_STATION),
84 },
85 {
86 .max = 1,
87 .types = BIT(NL80211_IFTYPE_P2P_GO) |
88 BIT(NL80211_IFTYPE_AP),
89 },
90};
91
92static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
93 {
94 .max = 2,
95 .types = BIT(NL80211_IFTYPE_STATION),
96 },
97 {
98 .max = 1,
99 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
100 },
101};
102
103static const struct ieee80211_iface_combination
104iwlagn_iface_combinations_dualmode[] = {
105 { .num_different_channels = 1,
106 .max_interfaces = 2,
107 .beacon_int_infra_match = true,
108 .limits = iwlagn_sta_ap_limits,
109 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
110 },
111 { .num_different_channels = 1,
112 .max_interfaces = 2,
113 .limits = iwlagn_2sta_limits,
114 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
115 },
116};
117
118static const struct ieee80211_iface_combination
119iwlagn_iface_combinations_p2p[] = {
120 { .num_different_channels = 1,
121 .max_interfaces = 2,
122 .beacon_int_infra_match = true,
123 .limits = iwlagn_p2p_sta_go_limits,
124 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
125 },
126 { .num_different_channels = 1,
127 .max_interfaces = 2,
128 .limits = iwlagn_p2p_2sta_limits,
129 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
130 },
131};
132
133/*
134 * Not a mac80211 entry point function, but it fits in with all the
135 * other mac80211 functions grouped here.
136 */
137int iwlagn_mac_setup_register(struct iwl_priv *priv,
138 struct iwlagn_ucode_capabilities *capa)
139{
140 int ret;
141 struct ieee80211_hw *hw = priv->hw;
142 struct iwl_rxon_context *ctx;
143
144 hw->rate_control_algorithm = "iwl-agn-rs";
145
146 /* Tell mac80211 our characteristics */
147 hw->flags = IEEE80211_HW_SIGNAL_DBM |
148 IEEE80211_HW_AMPDU_AGGREGATION |
149 IEEE80211_HW_NEED_DTIM_PERIOD |
150 IEEE80211_HW_SPECTRUM_MGMT |
151 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
152
153 /*
154 * Including the following line will crash some AP's. This
155 * workaround removes the stimulus which causes the crash until
156 * the AP software can be fixed.
157 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
158 */
159
160 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
161 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
162
163 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
164 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
165 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
166
167 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
168 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
169
170 hw->sta_data_size = sizeof(struct iwl_station_priv);
171 hw->vif_data_size = sizeof(struct iwl_vif_priv);
172
173 for_each_context(priv, ctx) {
174 hw->wiphy->interface_modes |= ctx->interface_modes;
175 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
176 }
177
178 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
179
180 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
181 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
182 hw->wiphy->n_iface_combinations =
183 ARRAY_SIZE(iwlagn_iface_combinations_p2p);
184 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
185 hw->wiphy->iface_combinations =
186 iwlagn_iface_combinations_dualmode;
187 hw->wiphy->n_iface_combinations =
188 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
189 }
190
191 hw->wiphy->max_remain_on_channel_duration = 1000;
192
193 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
194 WIPHY_FLAG_DISABLE_BEACON_HINTS |
195 WIPHY_FLAG_IBSS_RSN;
196
197 if (trans(priv)->ucode_wowlan.code.len &&
198 device_can_wakeup(bus(priv)->dev)) {
199 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
200 WIPHY_WOWLAN_DISCONNECT |
201 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
202 WIPHY_WOWLAN_RFKILL_RELEASE;
203 if (!iwlagn_mod_params.sw_crypto)
204 hw->wiphy->wowlan.flags |=
205 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
206 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
207
208 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
209 hw->wiphy->wowlan.pattern_min_len =
210 IWLAGN_WOWLAN_MIN_PATTERN_LEN;
211 hw->wiphy->wowlan.pattern_max_len =
212 IWLAGN_WOWLAN_MAX_PATTERN_LEN;
213 }
214
215 if (iwlagn_mod_params.power_save)
216 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
217 else
218 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
219
220 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
221 /* we create the 802.11 header and a zero-length SSID element */
222 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
223
224 /* Default value; 4 EDCA QOS priorities */
225 hw->queues = 4;
226
227 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
228
229 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
230 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
231 &priv->bands[IEEE80211_BAND_2GHZ];
232 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
233 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
234 &priv->bands[IEEE80211_BAND_5GHZ];
235
236 iwl_leds_init(priv);
237
238 ret = ieee80211_register_hw(priv->hw);
239 if (ret) {
240 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
241 return ret;
242 }
243 priv->mac80211_registered = 1;
244
245 return 0;
246}
247
248static int __iwl_up(struct iwl_priv *priv)
249{
250 struct iwl_rxon_context *ctx;
251 int ret;
252
253 lockdep_assert_held(&priv->shrd->mutex);
254
255 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
256 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
257 return -EIO;
258 }
259
260 for_each_context(priv, ctx) {
261 ret = iwlagn_alloc_bcast_station(priv, ctx);
262 if (ret) {
263 iwl_dealloc_bcast_stations(priv);
264 return ret;
265 }
266 }
267
268 ret = iwlagn_run_init_ucode(priv);
269 if (ret) {
270 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
271 goto error;
272 }
273
274 ret = iwlagn_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
275 if (ret) {
276 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
277 goto error;
278 }
279
280 ret = iwl_alive_start(priv);
281 if (ret)
282 goto error;
283 return 0;
284
285 error:
286 set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
287 __iwl_down(priv);
288 clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
289
290 IWL_ERR(priv, "Unable to initialize device.\n");
291 return ret;
292}
293
294static int iwlagn_mac_start(struct ieee80211_hw *hw)
295{
296 struct iwl_priv *priv = hw->priv;
297 int ret;
298
299 IWL_DEBUG_MAC80211(priv, "enter\n");
300
301 /* we should be verifying the device is ready to be opened */
302 mutex_lock(&priv->shrd->mutex);
303 ret = __iwl_up(priv);
304 mutex_unlock(&priv->shrd->mutex);
305 if (ret)
306 return ret;
307
308 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
309
310 /* Now we should be done, and the READY bit should be set. */
311 if (WARN_ON(!test_bit(STATUS_READY, &priv->shrd->status)))
312 ret = -EIO;
313
314 iwlagn_led_enable(priv);
315
316 priv->is_open = 1;
317 IWL_DEBUG_MAC80211(priv, "leave\n");
318 return 0;
319}
320
321static void iwlagn_mac_stop(struct ieee80211_hw *hw)
322{
323 struct iwl_priv *priv = hw->priv;
324
325 IWL_DEBUG_MAC80211(priv, "enter\n");
326
327 if (!priv->is_open)
328 return;
329
330 priv->is_open = 0;
331
332 iwl_down(priv);
333
334 flush_workqueue(priv->shrd->workqueue);
335
336 /* User space software may expect getting rfkill changes
337 * even if interface is down */
338 iwl_write32(bus(priv), CSR_INT, 0xFFFFFFFF);
339 iwl_enable_rfkill_int(priv);
340
341 IWL_DEBUG_MAC80211(priv, "leave\n");
342}
343
344static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
345 struct ieee80211_vif *vif,
346 struct cfg80211_gtk_rekey_data *data)
347{
348 struct iwl_priv *priv = hw->priv;
349
350 if (iwlagn_mod_params.sw_crypto)
351 return;
352
353 IWL_DEBUG_MAC80211(priv, "enter\n");
354 mutex_lock(&priv->shrd->mutex);
355
356 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
357 goto out;
358
359 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
360 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
361 priv->replay_ctr =
362 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
363 priv->have_rekey_data = true;
364
365 out:
366 mutex_unlock(&priv->shrd->mutex);
367 IWL_DEBUG_MAC80211(priv, "leave\n");
368}
369
370#ifdef CONFIG_PM_SLEEP
371
372static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
373 struct cfg80211_wowlan *wowlan)
374{
375 struct iwl_priv *priv = hw->priv;
376 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
377 int ret;
378
379 if (WARN_ON(!wowlan))
380 return -EINVAL;
381
382 IWL_DEBUG_MAC80211(priv, "enter\n");
383 mutex_lock(&priv->shrd->mutex);
384
385 /* Don't attempt WoWLAN when not associated, tear down instead. */
386 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
387 !iwl_is_associated_ctx(ctx)) {
388 ret = 1;
389 goto out;
390 }
391
392 ret = iwlagn_suspend(priv, hw, wowlan);
393 if (ret)
394 goto error;
395
396 device_set_wakeup_enable(bus(priv)->dev, true);
397
398 /* Now let the ucode operate on its own */
399 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
400 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
401
402 goto out;
403
404 error:
405 priv->shrd->wowlan = false;
406 iwlagn_prepare_restart(priv);
407 ieee80211_restart_hw(priv->hw);
408 out:
409 mutex_unlock(&priv->shrd->mutex);
410 IWL_DEBUG_MAC80211(priv, "leave\n");
411
412 return ret;
413}
414
415static int iwlagn_mac_resume(struct ieee80211_hw *hw)
416{
417 struct iwl_priv *priv = hw->priv;
418 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
419 struct ieee80211_vif *vif;
420 unsigned long flags;
421 u32 base, status = 0xffffffff;
422 int ret = -EIO;
423
424 IWL_DEBUG_MAC80211(priv, "enter\n");
425 mutex_lock(&priv->shrd->mutex);
426
427 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
428 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
429
430 base = priv->device_pointers.error_event_table;
431 if (iwlagn_hw_valid_rtc_data_addr(base)) {
432 spin_lock_irqsave(&bus(priv)->reg_lock, flags);
433 ret = iwl_grab_nic_access_silent(bus(priv));
434 if (ret == 0) {
435 iwl_write32(bus(priv), HBUS_TARG_MEM_RADDR, base);
436 status = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
437 iwl_release_nic_access(bus(priv));
438 }
439 spin_unlock_irqrestore(&bus(priv)->reg_lock, flags);
440
441#ifdef CONFIG_IWLWIFI_DEBUGFS
442 if (ret == 0) {
443 struct iwl_trans *trans = trans(priv);
444 if (!priv->wowlan_sram)
445 priv->wowlan_sram =
446 kzalloc(trans->ucode_wowlan.data.len,
447 GFP_KERNEL);
448
449 if (priv->wowlan_sram)
450 _iwl_read_targ_mem_words(
451 bus(priv), 0x800000, priv->wowlan_sram,
452 trans->ucode_wowlan.data.len / 4);
453 }
454#endif
455 }
456
457 /* we'll clear ctx->vif during iwlagn_prepare_restart() */
458 vif = ctx->vif;
459
460 priv->shrd->wowlan = false;
461
462 device_set_wakeup_enable(bus(priv)->dev, false);
463
464 iwlagn_prepare_restart(priv);
465
466 memset((void *)&ctx->active, 0, sizeof(ctx->active));
467 iwl_connection_init_rx_config(priv, ctx);
468 iwlagn_set_rxon_chain(priv, ctx);
469
470 mutex_unlock(&priv->shrd->mutex);
471 IWL_DEBUG_MAC80211(priv, "leave\n");
472
473 ieee80211_resume_disconnect(vif);
474
475 return 1;
476}
477
478#endif
479
480static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
481{
482 struct iwl_priv *priv = hw->priv;
483
484 IWL_DEBUG_MACDUMP(priv, "enter\n");
485
486 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
487 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
488
489 if (iwlagn_tx_skb(priv, skb))
490 dev_kfree_skb_any(skb);
491
492 IWL_DEBUG_MACDUMP(priv, "leave\n");
493}
494
495static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
496 struct ieee80211_vif *vif,
497 struct ieee80211_key_conf *keyconf,
498 struct ieee80211_sta *sta,
499 u32 iv32, u16 *phase1key)
500{
501 struct iwl_priv *priv = hw->priv;
502
503 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
504}
505
506static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
507 struct ieee80211_vif *vif,
508 struct ieee80211_sta *sta,
509 struct ieee80211_key_conf *key)
510{
511 struct iwl_priv *priv = hw->priv;
512 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
513 struct iwl_rxon_context *ctx = vif_priv->ctx;
514 int ret;
515 bool is_default_wep_key = false;
516
517 IWL_DEBUG_MAC80211(priv, "enter\n");
518
519 if (iwlagn_mod_params.sw_crypto) {
520 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
521 return -EOPNOTSUPP;
522 }
523
524 /*
525 * We could program these keys into the hardware as well, but we
526 * don't expect much multicast traffic in IBSS and having keys
527 * for more stations is probably more useful.
528 *
529 * Mark key TX-only and return 0.
530 */
531 if (vif->type == NL80211_IFTYPE_ADHOC &&
532 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
533 key->hw_key_idx = WEP_INVALID_OFFSET;
534 return 0;
535 }
536
537 /* If they key was TX-only, accept deletion */
538 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
539 return 0;
540
541 mutex_lock(&priv->shrd->mutex);
542 iwl_scan_cancel_timeout(priv, 100);
543
544 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
545
546 /*
547 * If we are getting WEP group key and we didn't receive any key mapping
548 * so far, we are in legacy wep mode (group key only), otherwise we are
549 * in 1X mode.
550 * In legacy wep mode, we use another host command to the uCode.
551 */
552 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
553 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
554 if (cmd == SET_KEY)
555 is_default_wep_key = !ctx->key_mapping_keys;
556 else
557 is_default_wep_key =
558 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
559 }
560
561
562 switch (cmd) {
563 case SET_KEY:
564 if (is_default_wep_key) {
565 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
566 break;
567 }
568 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
569 if (ret) {
570 /*
571 * can't add key for RX, but we don't need it
572 * in the device for TX so still return 0
573 */
574 ret = 0;
575 key->hw_key_idx = WEP_INVALID_OFFSET;
576 }
577
578 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
579 break;
580 case DISABLE_KEY:
581 if (is_default_wep_key)
582 ret = iwl_remove_default_wep_key(priv, ctx, key);
583 else
584 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
585
586 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
587 break;
588 default:
589 ret = -EINVAL;
590 }
591
592 mutex_unlock(&priv->shrd->mutex);
593 IWL_DEBUG_MAC80211(priv, "leave\n");
594
595 return ret;
596}
597
598static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
599 struct ieee80211_vif *vif,
600 enum ieee80211_ampdu_mlme_action action,
601 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
602 u8 buf_size)
603{
604 struct iwl_priv *priv = hw->priv;
605 int ret = -EINVAL;
606 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
607 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
608
609 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
610 sta->addr, tid);
611
612 if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
613 return -EACCES;
614
615 IWL_DEBUG_MAC80211(priv, "enter\n");
616 mutex_lock(&priv->shrd->mutex);
617
618 switch (action) {
619 case IEEE80211_AMPDU_RX_START:
620 IWL_DEBUG_HT(priv, "start Rx\n");
621 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
622 break;
623 case IEEE80211_AMPDU_RX_STOP:
624 IWL_DEBUG_HT(priv, "stop Rx\n");
625 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
626 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
627 ret = 0;
628 break;
629 case IEEE80211_AMPDU_TX_START:
630 IWL_DEBUG_HT(priv, "start Tx\n");
631 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
632 break;
633 case IEEE80211_AMPDU_TX_STOP:
634 IWL_DEBUG_HT(priv, "stop Tx\n");
635 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
636 if ((ret == 0) && (priv->agg_tids_count > 0)) {
637 priv->agg_tids_count--;
638 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
639 priv->agg_tids_count);
640 }
641 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
642 ret = 0;
643 if (!priv->agg_tids_count && priv->cfg->ht_params &&
644 priv->cfg->ht_params->use_rts_for_aggregation) {
645 /*
646 * switch off RTS/CTS if it was previously enabled
647 */
648 sta_priv->lq_sta.lq.general_params.flags &=
649 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
650 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
651 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
652 }
653 break;
654 case IEEE80211_AMPDU_TX_OPERATIONAL:
655 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
656
657 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, iwl_sta_id(sta),
658 tid, buf_size);
659
660 /*
661 * If the limit is 0, then it wasn't initialised yet,
662 * use the default. We can do that since we take the
663 * minimum below, and we don't want to go above our
664 * default due to hardware restrictions.
665 */
666 if (sta_priv->max_agg_bufsize == 0)
667 sta_priv->max_agg_bufsize =
668 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
669
670 /*
671 * Even though in theory the peer could have different
672 * aggregation reorder buffer sizes for different sessions,
673 * our ucode doesn't allow for that and has a global limit
674 * for each station. Therefore, use the minimum of all the
675 * aggregation sessions and our default value.
676 */
677 sta_priv->max_agg_bufsize =
678 min(sta_priv->max_agg_bufsize, buf_size);
679
680 if (priv->cfg->ht_params &&
681 priv->cfg->ht_params->use_rts_for_aggregation) {
682 /*
683 * switch to RTS/CTS if it is the prefer protection
684 * method for HT traffic
685 */
686
687 sta_priv->lq_sta.lq.general_params.flags |=
688 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
689 }
690 priv->agg_tids_count++;
691 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
692 priv->agg_tids_count);
693
694 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
695 sta_priv->max_agg_bufsize;
696
697 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
698 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
699
700 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
701 sta->addr, tid);
702 ret = 0;
703 break;
704 }
705 mutex_unlock(&priv->shrd->mutex);
706 IWL_DEBUG_MAC80211(priv, "leave\n");
707 return ret;
708}
709
710static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
711 struct ieee80211_vif *vif,
712 struct ieee80211_sta *sta)
713{
714 struct iwl_priv *priv = hw->priv;
715 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
716 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
717 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
718 int ret = 0;
719 u8 sta_id;
720
721 IWL_DEBUG_MAC80211(priv, "received request to add station %pM\n",
722 sta->addr);
723 mutex_lock(&priv->shrd->mutex);
724 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
725 sta->addr);
726 sta_priv->sta_id = IWL_INVALID_STATION;
727
728 atomic_set(&sta_priv->pending_frames, 0);
729 if (vif->type == NL80211_IFTYPE_AP)
730 sta_priv->client = true;
731
732 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
733 is_ap, sta, &sta_id);
734 if (ret) {
735 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
736 sta->addr, ret);
737 /* Should we return success if return code is EEXIST ? */
738 goto out;
739 }
740
741 sta_priv->sta_id = sta_id;
742
743 /* Initialize rate scaling */
744 IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
745 sta->addr);
746 iwl_rs_rate_init(priv, sta, sta_id);
747 out:
748 mutex_unlock(&priv->shrd->mutex);
749 IWL_DEBUG_MAC80211(priv, "leave\n");
750
751 return ret;
752}
753
754static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
755 struct ieee80211_channel_switch *ch_switch)
756{
757 struct iwl_priv *priv = hw->priv;
758 const struct iwl_channel_info *ch_info;
759 struct ieee80211_conf *conf = &hw->conf;
760 struct ieee80211_channel *channel = ch_switch->channel;
761 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
762 /*
763 * MULTI-FIXME
764 * When we add support for multiple interfaces, we need to
765 * revisit this. The channel switch command in the device
766 * only affects the BSS context, but what does that really
767 * mean? And what if we get a CSA on the second interface?
768 * This needs a lot of work.
769 */
770 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
771 u16 ch;
772
773 IWL_DEBUG_MAC80211(priv, "enter\n");
774
775 mutex_lock(&priv->shrd->mutex);
776
777 if (iwl_is_rfkill(priv->shrd))
778 goto out;
779
780 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
781 test_bit(STATUS_SCANNING, &priv->shrd->status) ||
782 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
783 goto out;
784
785 if (!iwl_is_associated_ctx(ctx))
786 goto out;
787
788 if (!priv->cfg->lib->set_channel_switch)
789 goto out;
790
791 ch = channel->hw_value;
792 if (le16_to_cpu(ctx->active.channel) == ch)
793 goto out;
794
795 ch_info = iwl_get_channel_info(priv, channel->band, ch);
796 if (!is_channel_valid(ch_info)) {
797 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
798 goto out;
799 }
800
801 spin_lock_irq(&priv->shrd->lock);
802
803 priv->current_ht_config.smps = conf->smps_mode;
804
805 /* Configure HT40 channels */
806 ctx->ht.enabled = conf_is_ht(conf);
807 if (ctx->ht.enabled) {
808 if (conf_is_ht40_minus(conf)) {
809 ctx->ht.extension_chan_offset =
810 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
811 ctx->ht.is_40mhz = true;
812 } else if (conf_is_ht40_plus(conf)) {
813 ctx->ht.extension_chan_offset =
814 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
815 ctx->ht.is_40mhz = true;
816 } else {
817 ctx->ht.extension_chan_offset =
818 IEEE80211_HT_PARAM_CHA_SEC_NONE;
819 ctx->ht.is_40mhz = false;
820 }
821 } else
822 ctx->ht.is_40mhz = false;
823
824 if ((le16_to_cpu(ctx->staging.channel) != ch))
825 ctx->staging.flags = 0;
826
827 iwl_set_rxon_channel(priv, channel, ctx);
828 iwl_set_rxon_ht(priv, ht_conf);
829 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
830
831 spin_unlock_irq(&priv->shrd->lock);
832
833 iwl_set_rate(priv);
834 /*
835 * at this point, staging_rxon has the
836 * configuration for channel switch
837 */
838 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
839 priv->switch_channel = cpu_to_le16(ch);
840 if (priv->cfg->lib->set_channel_switch(priv, ch_switch)) {
841 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
842 priv->switch_channel = 0;
843 ieee80211_chswitch_done(ctx->vif, false);
844 }
845
846out:
847 mutex_unlock(&priv->shrd->mutex);
848 IWL_DEBUG_MAC80211(priv, "leave\n");
849}
850
851static void iwlagn_configure_filter(struct ieee80211_hw *hw,
852 unsigned int changed_flags,
853 unsigned int *total_flags,
854 u64 multicast)
855{
856 struct iwl_priv *priv = hw->priv;
857 __le32 filter_or = 0, filter_nand = 0;
858 struct iwl_rxon_context *ctx;
859
860#define CHK(test, flag) do { \
861 if (*total_flags & (test)) \
862 filter_or |= (flag); \
863 else \
864 filter_nand |= (flag); \
865 } while (0)
866
867 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
868 changed_flags, *total_flags);
869
870 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
871 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
872 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
873 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
874
875#undef CHK
876
877 mutex_lock(&priv->shrd->mutex);
878
879 for_each_context(priv, ctx) {
880 ctx->staging.filter_flags &= ~filter_nand;
881 ctx->staging.filter_flags |= filter_or;
882
883 /*
884 * Not committing directly because hardware can perform a scan,
885 * but we'll eventually commit the filter flags change anyway.
886 */
887 }
888
889 mutex_unlock(&priv->shrd->mutex);
890
891 /*
892 * Receiving all multicast frames is always enabled by the
893 * default flags setup in iwl_connection_init_rx_config()
894 * since we currently do not support programming multicast
895 * filters into the device.
896 */
897 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
898 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
899}
900
901static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
902{
903 struct iwl_priv *priv = hw->priv;
904
905 mutex_lock(&priv->shrd->mutex);
906 IWL_DEBUG_MAC80211(priv, "enter\n");
907
908 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
909 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
910 goto done;
911 }
912 if (iwl_is_rfkill(priv->shrd)) {
913 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
914 goto done;
915 }
916
917 /*
918 * mac80211 will not push any more frames for transmit
919 * until the flush is completed
920 */
921 if (drop) {
922 IWL_DEBUG_MAC80211(priv, "send flush command\n");
923 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
924 IWL_ERR(priv, "flush request fail\n");
925 goto done;
926 }
927 }
928 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
929 iwl_trans_wait_tx_queue_empty(trans(priv));
930done:
931 mutex_unlock(&priv->shrd->mutex);
932 IWL_DEBUG_MAC80211(priv, "leave\n");
933}
934
935static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
936 struct ieee80211_channel *channel,
937 enum nl80211_channel_type channel_type,
938 int duration)
939{
940 struct iwl_priv *priv = hw->priv;
941 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
942 int err = 0;
943
944 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
945 return -EOPNOTSUPP;
946
947 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
948 return -EOPNOTSUPP;
949
950 IWL_DEBUG_MAC80211(priv, "enter\n");
951 mutex_lock(&priv->shrd->mutex);
952
953 if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
954 err = -EBUSY;
955 goto out;
956 }
957
958 priv->hw_roc_channel = channel;
959 priv->hw_roc_chantype = channel_type;
960 /* convert from ms to TU */
961 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
962 priv->hw_roc_start_notified = false;
963 cancel_delayed_work(&priv->hw_roc_disable_work);
964
965 if (!ctx->is_active) {
966 static const struct iwl_qos_info default_qos_data = {
967 .def_qos_parm = {
968 .ac[0] = {
969 .cw_min = cpu_to_le16(3),
970 .cw_max = cpu_to_le16(7),
971 .aifsn = 2,
972 .edca_txop = cpu_to_le16(1504),
973 },
974 .ac[1] = {
975 .cw_min = cpu_to_le16(7),
976 .cw_max = cpu_to_le16(15),
977 .aifsn = 2,
978 .edca_txop = cpu_to_le16(3008),
979 },
980 .ac[2] = {
981 .cw_min = cpu_to_le16(15),
982 .cw_max = cpu_to_le16(1023),
983 .aifsn = 3,
984 },
985 .ac[3] = {
986 .cw_min = cpu_to_le16(15),
987 .cw_max = cpu_to_le16(1023),
988 .aifsn = 7,
989 },
990 },
991 };
992
993 ctx->is_active = true;
994 ctx->qos_data = default_qos_data;
995 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
996 memcpy(ctx->staging.node_addr,
997 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
998 ETH_ALEN);
999 memcpy(ctx->staging.bssid_addr,
1000 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1001 ETH_ALEN);
1002 err = iwlagn_commit_rxon(priv, ctx);
1003 if (err)
1004 goto out;
1005 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1006 RXON_FILTER_PROMISC_MSK |
1007 RXON_FILTER_CTL2HOST_MSK;
1008
1009 err = iwlagn_commit_rxon(priv, ctx);
1010 if (err) {
1011 iwlagn_disable_roc(priv);
1012 goto out;
1013 }
1014 priv->hw_roc_setup = true;
1015 }
1016
1017 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1018 if (err)
1019 iwlagn_disable_roc(priv);
1020
1021 out:
1022 mutex_unlock(&priv->shrd->mutex);
1023 IWL_DEBUG_MAC80211(priv, "leave\n");
1024
1025 return err;
1026}
1027
1028static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1029{
1030 struct iwl_priv *priv = hw->priv;
1031
1032 if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1033 return -EOPNOTSUPP;
1034
1035 IWL_DEBUG_MAC80211(priv, "enter\n");
1036 mutex_lock(&priv->shrd->mutex);
1037 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1038 iwlagn_disable_roc(priv);
1039 mutex_unlock(&priv->shrd->mutex);
1040 IWL_DEBUG_MAC80211(priv, "leave\n");
1041
1042 return 0;
1043}
1044
1045static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
1046 struct ieee80211_vif *vif,
1047 const u8 *bssid,
1048 enum ieee80211_tx_sync_type type)
1049{
1050 struct iwl_priv *priv = hw->priv;
1051 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1052 struct iwl_rxon_context *ctx = vif_priv->ctx;
1053 int ret;
1054 u8 sta_id;
1055
1056 IWL_DEBUG_MAC80211(priv, "enter\n");
1057 mutex_lock(&priv->shrd->mutex);
1058
1059 if (iwl_is_associated_ctx(ctx)) {
1060 ret = 0;
1061 goto out;
1062 }
1063
1064 if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
1065 &priv->shrd->status)) {
1066 ret = -EBUSY;
1067 goto out;
1068 }
1069
1070 ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
1071 if (ret)
1072 goto out;
1073
1074 if (WARN_ON(sta_id != ctx->ap_sta_id)) {
1075 ret = -EIO;
1076 goto out_remove_sta;
1077 }
1078
1079 memcpy(ctx->bssid, bssid, ETH_ALEN);
1080 ctx->preauth_bssid = true;
1081
1082 ret = iwlagn_commit_rxon(priv, ctx);
1083
1084 if (ret == 0)
1085 goto out;
1086
1087 out_remove_sta:
1088 iwl_remove_station(priv, sta_id, bssid);
1089 out:
1090 mutex_unlock(&priv->shrd->mutex);
1091 IWL_DEBUG_MAC80211(priv, "leave\n");
1092
1093 return ret;
1094}
1095
1096static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
1097 struct ieee80211_vif *vif,
1098 const u8 *bssid,
1099 enum ieee80211_tx_sync_type type)
1100{
1101 struct iwl_priv *priv = hw->priv;
1102 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1103 struct iwl_rxon_context *ctx = vif_priv->ctx;
1104
1105 IWL_DEBUG_MAC80211(priv, "enter\n");
1106 mutex_lock(&priv->shrd->mutex);
1107
1108 if (iwl_is_associated_ctx(ctx))
1109 goto out;
1110
1111 iwl_remove_station(priv, ctx->ap_sta_id, bssid);
1112 ctx->preauth_bssid = false;
1113 /* no need to commit */
1114 out:
1115 mutex_unlock(&priv->shrd->mutex);
1116 IWL_DEBUG_MAC80211(priv, "leave\n");
1117}
1118
1119static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1120 enum ieee80211_rssi_event rssi_event)
1121{
1122 struct iwl_priv *priv = hw->priv;
1123
1124 IWL_DEBUG_MAC80211(priv, "enter\n");
1125 mutex_lock(&priv->shrd->mutex);
1126
1127 if (priv->cfg->bt_params &&
1128 priv->cfg->bt_params->advanced_bt_coexist) {
1129 if (rssi_event == RSSI_EVENT_LOW)
1130 priv->bt_enable_pspoll = true;
1131 else if (rssi_event == RSSI_EVENT_HIGH)
1132 priv->bt_enable_pspoll = false;
1133
1134 iwlagn_send_advance_bt_config(priv);
1135 } else {
1136 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1137 "ignoring RSSI callback\n");
1138 }
1139
1140 mutex_unlock(&priv->shrd->mutex);
1141 IWL_DEBUG_MAC80211(priv, "leave\n");
1142}
1143
1144static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1145 struct ieee80211_sta *sta, bool set)
1146{
1147 struct iwl_priv *priv = hw->priv;
1148
1149 queue_work(priv->shrd->workqueue, &priv->beacon_update);
1150
1151 return 0;
1152}
1153
1154static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1155 struct ieee80211_vif *vif, u16 queue,
1156 const struct ieee80211_tx_queue_params *params)
1157{
1158 struct iwl_priv *priv = hw->priv;
1159 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1160 struct iwl_rxon_context *ctx = vif_priv->ctx;
1161 unsigned long flags;
1162 int q;
1163
1164 if (WARN_ON(!ctx))
1165 return -EINVAL;
1166
1167 IWL_DEBUG_MAC80211(priv, "enter\n");
1168
1169 if (!iwl_is_ready_rf(priv->shrd)) {
1170 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1171 return -EIO;
1172 }
1173
1174 if (queue >= AC_NUM) {
1175 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1176 return 0;
1177 }
1178
1179 q = AC_NUM - 1 - queue;
1180
1181 spin_lock_irqsave(&priv->shrd->lock, flags);
1182
1183 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1184 cpu_to_le16(params->cw_min);
1185 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1186 cpu_to_le16(params->cw_max);
1187 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1188 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1189 cpu_to_le16((params->txop * 32));
1190
1191 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1192
1193 spin_unlock_irqrestore(&priv->shrd->lock, flags);
1194
1195 IWL_DEBUG_MAC80211(priv, "leave\n");
1196 return 0;
1197}
1198
1199static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1200{
1201 struct iwl_priv *priv = hw->priv;
1202
1203 return priv->ibss_manager == IWL_IBSS_MANAGER;
1204}
1205
1206static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1207{
1208 iwl_connection_init_rx_config(priv, ctx);
1209
1210 iwlagn_set_rxon_chain(priv, ctx);
1211
1212 return iwlagn_commit_rxon(priv, ctx);
1213}
1214
1215static int iwl_setup_interface(struct iwl_priv *priv,
1216 struct iwl_rxon_context *ctx)
1217{
1218 struct ieee80211_vif *vif = ctx->vif;
1219 int err;
1220
1221 lockdep_assert_held(&priv->shrd->mutex);
1222
1223 /*
1224 * This variable will be correct only when there's just
1225 * a single context, but all code using it is for hardware
1226 * that supports only one context.
1227 */
1228 priv->iw_mode = vif->type;
1229
1230 ctx->is_active = true;
1231
1232 err = iwl_set_mode(priv, ctx);
1233 if (err) {
1234 if (!ctx->always_active)
1235 ctx->is_active = false;
1236 return err;
1237 }
1238
1239 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1240 vif->type == NL80211_IFTYPE_ADHOC) {
1241 /*
1242 * pretend to have high BT traffic as long as we
1243 * are operating in IBSS mode, as this will cause
1244 * the rate scaling etc. to behave as intended.
1245 */
1246 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1247 }
1248
1249 return 0;
1250}
1251
1252static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1253 struct ieee80211_vif *vif)
1254{
1255 struct iwl_priv *priv = hw->priv;
1256 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1257 struct iwl_rxon_context *tmp, *ctx = NULL;
1258 int err;
1259 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1260
1261 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1262 viftype, vif->addr);
1263
1264 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1265
1266 mutex_lock(&priv->shrd->mutex);
1267
1268 iwlagn_disable_roc(priv);
1269
1270 if (!iwl_is_ready_rf(priv->shrd)) {
1271 IWL_WARN(priv, "Try to add interface when device not ready\n");
1272 err = -EINVAL;
1273 goto out;
1274 }
1275
1276 for_each_context(priv, tmp) {
1277 u32 possible_modes =
1278 tmp->interface_modes | tmp->exclusive_interface_modes;
1279
1280 if (tmp->vif) {
1281 /* check if this busy context is exclusive */
1282 if (tmp->exclusive_interface_modes &
1283 BIT(tmp->vif->type)) {
1284 err = -EINVAL;
1285 goto out;
1286 }
1287 continue;
1288 }
1289
1290 if (!(possible_modes & BIT(viftype)))
1291 continue;
1292
1293 /* have maybe usable context w/o interface */
1294 ctx = tmp;
1295 break;
1296 }
1297
1298 if (!ctx) {
1299 err = -EOPNOTSUPP;
1300 goto out;
1301 }
1302
1303 vif_priv->ctx = ctx;
1304 ctx->vif = vif;
1305
1306 err = iwl_setup_interface(priv, ctx);
1307 if (!err)
1308 goto out;
1309
1310 ctx->vif = NULL;
1311 priv->iw_mode = NL80211_IFTYPE_STATION;
1312 out:
1313 mutex_unlock(&priv->shrd->mutex);
1314
1315 IWL_DEBUG_MAC80211(priv, "leave\n");
1316 return err;
1317}
1318
1319static void iwl_teardown_interface(struct iwl_priv *priv,
1320 struct ieee80211_vif *vif,
1321 bool mode_change)
1322{
1323 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1324
1325 lockdep_assert_held(&priv->shrd->mutex);
1326
1327 if (priv->scan_vif == vif) {
1328 iwl_scan_cancel_timeout(priv, 200);
1329 iwl_force_scan_end(priv);
1330 }
1331
1332 if (!mode_change) {
1333 iwl_set_mode(priv, ctx);
1334 if (!ctx->always_active)
1335 ctx->is_active = false;
1336 }
1337
1338 /*
1339 * When removing the IBSS interface, overwrite the
1340 * BT traffic load with the stored one from the last
1341 * notification, if any. If this is a device that
1342 * doesn't implement this, this has no effect since
1343 * both values are the same and zero.
1344 */
1345 if (vif->type == NL80211_IFTYPE_ADHOC)
1346 priv->bt_traffic_load = priv->last_bt_traffic_load;
1347}
1348
1349static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1350 struct ieee80211_vif *vif)
1351{
1352 struct iwl_priv *priv = hw->priv;
1353 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1354
1355 IWL_DEBUG_MAC80211(priv, "enter\n");
1356
1357 mutex_lock(&priv->shrd->mutex);
1358
1359 if (WARN_ON(ctx->vif != vif)) {
1360 struct iwl_rxon_context *tmp;
1361 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1362 for_each_context(priv, tmp)
1363 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1364 tmp->ctxid, tmp, tmp->vif);
1365 }
1366 ctx->vif = NULL;
1367
1368 iwl_teardown_interface(priv, vif, false);
1369
1370 mutex_unlock(&priv->shrd->mutex);
1371
1372 IWL_DEBUG_MAC80211(priv, "leave\n");
1373
1374}
1375
1376static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1377 struct ieee80211_vif *vif,
1378 enum nl80211_iftype newtype, bool newp2p)
1379{
1380 struct iwl_priv *priv = hw->priv;
1381 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1382 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1383 struct iwl_rxon_context *tmp;
1384 enum nl80211_iftype newviftype = newtype;
1385 u32 interface_modes;
1386 int err;
1387
1388 IWL_DEBUG_MAC80211(priv, "enter\n");
1389
1390 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1391
1392 mutex_lock(&priv->shrd->mutex);
1393
1394 if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1395 /*
1396 * Huh? But wait ... this can maybe happen when
1397 * we're in the middle of a firmware restart!
1398 */
1399 err = -EBUSY;
1400 goto out;
1401 }
1402
1403 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1404
1405 if (!(interface_modes & BIT(newtype))) {
1406 err = -EBUSY;
1407 goto out;
1408 }
1409
1410 /*
1411 * Refuse a change that should be done by moving from the PAN
1412 * context to the BSS context instead, if the BSS context is
1413 * available and can support the new interface type.
1414 */
1415 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1416 (bss_ctx->interface_modes & BIT(newtype) ||
1417 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1418 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1419 err = -EBUSY;
1420 goto out;
1421 }
1422
1423 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1424 for_each_context(priv, tmp) {
1425 if (ctx == tmp)
1426 continue;
1427
1428 if (!tmp->vif)
1429 continue;
1430
1431 /*
1432 * The current mode switch would be exclusive, but
1433 * another context is active ... refuse the switch.
1434 */
1435 err = -EBUSY;
1436 goto out;
1437 }
1438 }
1439
1440 /* success */
1441 iwl_teardown_interface(priv, vif, true);
1442 vif->type = newviftype;
1443 vif->p2p = newp2p;
1444 err = iwl_setup_interface(priv, ctx);
1445 WARN_ON(err);
1446 /*
1447 * We've switched internally, but submitting to the
1448 * device may have failed for some reason. Mask this
1449 * error, because otherwise mac80211 will not switch
1450 * (and set the interface type back) and we'll be
1451 * out of sync with it.
1452 */
1453 err = 0;
1454
1455 out:
1456 mutex_unlock(&priv->shrd->mutex);
1457 IWL_DEBUG_MAC80211(priv, "leave\n");
1458
1459 return err;
1460}
1461
1462static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1463 struct ieee80211_vif *vif,
1464 struct cfg80211_scan_request *req)
1465{
1466 struct iwl_priv *priv = hw->priv;
1467 int ret;
1468
1469 IWL_DEBUG_MAC80211(priv, "enter\n");
1470
1471 if (req->n_channels == 0)
1472 return -EINVAL;
1473
1474 mutex_lock(&priv->shrd->mutex);
1475
1476 /*
1477 * If an internal scan is in progress, just set
1478 * up the scan_request as per above.
1479 */
1480 if (priv->scan_type != IWL_SCAN_NORMAL) {
1481 IWL_DEBUG_SCAN(priv,
1482 "SCAN request during internal scan - defer\n");
1483 priv->scan_request = req;
1484 priv->scan_vif = vif;
1485 ret = 0;
1486 } else {
1487 priv->scan_request = req;
1488 priv->scan_vif = vif;
1489 /*
1490 * mac80211 will only ask for one band at a time
1491 * so using channels[0] here is ok
1492 */
1493 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1494 req->channels[0]->band);
1495 if (ret) {
1496 priv->scan_request = NULL;
1497 priv->scan_vif = NULL;
1498 }
1499 }
1500
1501 IWL_DEBUG_MAC80211(priv, "leave\n");
1502
1503 mutex_unlock(&priv->shrd->mutex);
1504
1505 return ret;
1506}
1507
1508static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
1509 struct ieee80211_vif *vif,
1510 struct ieee80211_sta *sta)
1511{
1512 struct iwl_priv *priv = hw->priv;
1513 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1514 int ret;
1515
1516 IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
1517 "station %pM\n", sta->addr);
1518 mutex_lock(&priv->shrd->mutex);
1519 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1520 sta->addr);
1521 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
1522 if (ret)
1523 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
1524 sta->addr);
1525 mutex_unlock(&priv->shrd->mutex);
1526 IWL_DEBUG_MAC80211(priv, "leave\n");
1527
1528 return ret;
1529}
1530
1531static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1532{
1533 unsigned long flags;
1534
1535 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1536 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1537 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1538 priv->stations[sta_id].sta.sta.modify_mask = 0;
1539 priv->stations[sta_id].sta.sleep_tx_count = 0;
1540 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1541 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1542 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1543
1544}
1545
1546static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1547 struct ieee80211_vif *vif,
1548 enum sta_notify_cmd cmd,
1549 struct ieee80211_sta *sta)
1550{
1551 struct iwl_priv *priv = hw->priv;
1552 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1553 int sta_id;
1554
1555 IWL_DEBUG_MAC80211(priv, "enter\n");
1556
1557 switch (cmd) {
1558 case STA_NOTIFY_SLEEP:
1559 WARN_ON(!sta_priv->client);
1560 sta_priv->asleep = true;
1561 if (atomic_read(&sta_priv->pending_frames) > 0)
1562 ieee80211_sta_block_awake(hw, sta, true);
1563 break;
1564 case STA_NOTIFY_AWAKE:
1565 WARN_ON(!sta_priv->client);
1566 if (!sta_priv->asleep)
1567 break;
1568 sta_priv->asleep = false;
1569 sta_id = iwl_sta_id(sta);
1570 if (sta_id != IWL_INVALID_STATION)
1571 iwl_sta_modify_ps_wake(priv, sta_id);
1572 break;
1573 default:
1574 break;
1575 }
1576 IWL_DEBUG_MAC80211(priv, "leave\n");
1577}
1578
1579struct ieee80211_ops iwlagn_hw_ops = {
1580 .tx = iwlagn_mac_tx,
1581 .start = iwlagn_mac_start,
1582 .stop = iwlagn_mac_stop,
1583#ifdef CONFIG_PM_SLEEP
1584 .suspend = iwlagn_mac_suspend,
1585 .resume = iwlagn_mac_resume,
1586#endif
1587 .add_interface = iwlagn_mac_add_interface,
1588 .remove_interface = iwlagn_mac_remove_interface,
1589 .change_interface = iwlagn_mac_change_interface,
1590 .config = iwlagn_mac_config,
1591 .configure_filter = iwlagn_configure_filter,
1592 .set_key = iwlagn_mac_set_key,
1593 .update_tkip_key = iwlagn_mac_update_tkip_key,
1594 .set_rekey_data = iwlagn_mac_set_rekey_data,
1595 .conf_tx = iwlagn_mac_conf_tx,
1596 .bss_info_changed = iwlagn_bss_info_changed,
1597 .ampdu_action = iwlagn_mac_ampdu_action,
1598 .hw_scan = iwlagn_mac_hw_scan,
1599 .sta_notify = iwlagn_mac_sta_notify,
1600 .sta_add = iwlagn_mac_sta_add,
1601 .sta_remove = iwlagn_mac_sta_remove,
1602 .channel_switch = iwlagn_mac_channel_switch,
1603 .flush = iwlagn_mac_flush,
1604 .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1605 .remain_on_channel = iwlagn_mac_remain_on_channel,
1606 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1607 .rssi_callback = iwlagn_mac_rssi_callback,
1608 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1609 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1610 .tx_sync = iwlagn_mac_tx_sync,
1611 .finish_tx_sync = iwlagn_mac_finish_tx_sync,
1612 .set_tim = iwlagn_mac_set_tim,
1613};
1614
1615/* This function both allocates and initializes hw and priv. */
1616struct ieee80211_hw *iwl_alloc_all(void)
1617{
1618 struct iwl_priv *priv;
1619 /* mac80211 allocates memory for this device instance, including
1620 * space for this driver's private structure */
1621 struct ieee80211_hw *hw;
1622
1623 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
1624 if (!hw)
1625 goto out;
1626
1627 priv = hw->priv;
1628 priv->hw = hw;
1629
1630out:
1631 return hw;
1632}
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-16 02:15:35 -0500