1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2018-2023 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015-2017 Intel Deutschland GmbH
6 */
7 #if defined(__FreeBSD__)
8 #include <linux/math64.h>
9 #endif
10 #include <net/mac80211.h>
11
12 #include "iwl-debug.h"
13 #include "iwl-io.h"
14 #include "iwl-prph.h"
15 #include "iwl-csr.h"
16 #include "mvm.h"
17 #include "fw/api/rs.h"
18 #include "fw/img.h"
19
20 /*
21 * Will return 0 even if the cmd failed when RFKILL is asserted unless
22 * CMD_WANT_SKB is set in cmd->flags.
23 */
iwl_mvm_send_cmd(struct iwl_mvm * mvm,struct iwl_host_cmd * cmd)24 int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
25 {
26 int ret;
27
28 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
29 if (WARN_ON(mvm->d3_test_active))
30 return -EIO;
31 #endif
32
33 /*
34 * Synchronous commands from this op-mode must hold
35 * the mutex, this ensures we don't try to send two
36 * (or more) synchronous commands at a time.
37 */
38 if (!(cmd->flags & CMD_ASYNC))
39 lockdep_assert_held(&mvm->mutex);
40
41 ret = iwl_trans_send_cmd(mvm->trans, cmd);
42
43 /*
44 * If the caller wants the SKB, then don't hide any problems, the
45 * caller might access the response buffer which will be NULL if
46 * the command failed.
47 */
48 if (cmd->flags & CMD_WANT_SKB)
49 return ret;
50
51 /*
52 * Silently ignore failures if RFKILL is asserted or
53 * we are in suspend\resume process
54 */
55 if (!ret || ret == -ERFKILL || ret == -EHOSTDOWN)
56 return 0;
57 return ret;
58 }
59
iwl_mvm_send_cmd_pdu(struct iwl_mvm * mvm,u32 id,u32 flags,u16 len,const void * data)60 int iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u32 id,
61 u32 flags, u16 len, const void *data)
62 {
63 struct iwl_host_cmd cmd = {
64 .id = id,
65 .len = { len, },
66 .data = { data, },
67 .flags = flags,
68 };
69
70 return iwl_mvm_send_cmd(mvm, &cmd);
71 }
72
73 /*
74 * We assume that the caller set the status to the success value
75 */
iwl_mvm_send_cmd_status(struct iwl_mvm * mvm,struct iwl_host_cmd * cmd,u32 * status)76 int iwl_mvm_send_cmd_status(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd,
77 u32 *status)
78 {
79 struct iwl_rx_packet *pkt;
80 struct iwl_cmd_response *resp;
81 int ret, resp_len;
82
83 lockdep_assert_held(&mvm->mutex);
84
85 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
86 if (WARN_ON(mvm->d3_test_active))
87 return -EIO;
88 #endif
89
90 /*
91 * Only synchronous commands can wait for status,
92 * we use WANT_SKB so the caller can't.
93 */
94 if (WARN_ONCE(cmd->flags & (CMD_ASYNC | CMD_WANT_SKB),
95 "cmd flags %x", cmd->flags))
96 return -EINVAL;
97
98 cmd->flags |= CMD_WANT_SKB;
99
100 ret = iwl_trans_send_cmd(mvm->trans, cmd);
101 if (ret == -ERFKILL) {
102 /*
103 * The command failed because of RFKILL, don't update
104 * the status, leave it as success and return 0.
105 */
106 return 0;
107 } else if (ret) {
108 return ret;
109 }
110
111 pkt = cmd->resp_pkt;
112
113 resp_len = iwl_rx_packet_payload_len(pkt);
114 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
115 ret = -EIO;
116 goto out_free_resp;
117 }
118
119 resp = (void *)pkt->data;
120 *status = le32_to_cpu(resp->status);
121 out_free_resp:
122 iwl_free_resp(cmd);
123 return ret;
124 }
125
126 /*
127 * We assume that the caller set the status to the sucess value
128 */
iwl_mvm_send_cmd_pdu_status(struct iwl_mvm * mvm,u32 id,u16 len,const void * data,u32 * status)129 int iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u32 id, u16 len,
130 const void *data, u32 *status)
131 {
132 struct iwl_host_cmd cmd = {
133 .id = id,
134 .len = { len, },
135 .data = { data, },
136 };
137
138 return iwl_mvm_send_cmd_status(mvm, &cmd, status);
139 }
140
iwl_mvm_legacy_hw_idx_to_mac80211_idx(u32 rate_n_flags,enum nl80211_band band)141 int iwl_mvm_legacy_hw_idx_to_mac80211_idx(u32 rate_n_flags,
142 enum nl80211_band band)
143 {
144 int format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
145 int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
146 bool is_LB = band == NL80211_BAND_2GHZ;
147
148 if (format == RATE_MCS_LEGACY_OFDM_MSK)
149 return is_LB ? rate + IWL_FIRST_OFDM_RATE :
150 rate;
151
152 /* CCK is not allowed in HB */
153 return is_LB ? rate : -1;
154 }
155
iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,enum nl80211_band band)156 int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
157 enum nl80211_band band)
158 {
159 int rate = rate_n_flags & RATE_LEGACY_RATE_MSK_V1;
160 int idx;
161 int band_offset = 0;
162
163 /* Legacy rate format, search for match in table */
164 if (band != NL80211_BAND_2GHZ)
165 band_offset = IWL_FIRST_OFDM_RATE;
166 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
167 if (iwl_fw_rate_idx_to_plcp(idx) == rate)
168 return idx - band_offset;
169
170 return -1;
171 }
172
iwl_mvm_mac80211_idx_to_hwrate(const struct iwl_fw * fw,int rate_idx)173 u8 iwl_mvm_mac80211_idx_to_hwrate(const struct iwl_fw *fw, int rate_idx)
174 {
175 if (iwl_fw_lookup_cmd_ver(fw, TX_CMD, 0) > 8)
176 /* In the new rate legacy rates are indexed:
177 * 0 - 3 for CCK and 0 - 7 for OFDM.
178 */
179 return (rate_idx >= IWL_FIRST_OFDM_RATE ?
180 rate_idx - IWL_FIRST_OFDM_RATE :
181 rate_idx);
182
183 return iwl_fw_rate_idx_to_plcp(rate_idx);
184 }
185
iwl_mvm_mac80211_ac_to_ucode_ac(enum ieee80211_ac_numbers ac)186 u8 iwl_mvm_mac80211_ac_to_ucode_ac(enum ieee80211_ac_numbers ac)
187 {
188 static const u8 mac80211_ac_to_ucode_ac[] = {
189 AC_VO,
190 AC_VI,
191 AC_BE,
192 AC_BK
193 };
194
195 return mac80211_ac_to_ucode_ac[ac];
196 }
197
iwl_mvm_rx_fw_error(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)198 void iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
199 {
200 struct iwl_rx_packet *pkt = rxb_addr(rxb);
201 struct iwl_error_resp *err_resp = (void *)pkt->data;
202
203 IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
204 le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
205 IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
206 le16_to_cpu(err_resp->bad_cmd_seq_num),
207 le32_to_cpu(err_resp->error_service));
208 IWL_ERR(mvm, "FW Error notification: timestamp 0x%016llX\n",
209 le64_to_cpu(err_resp->timestamp));
210 }
211
212 /*
213 * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
214 * The parameter should also be a combination of ANT_[ABC].
215 */
first_antenna(u8 mask)216 u8 first_antenna(u8 mask)
217 {
218 BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
219 if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
220 return BIT(0);
221 return BIT(ffs(mask) - 1);
222 }
223
224 #define MAX_ANT_NUM 2
225 /*
226 * Toggles between TX antennas to send the probe request on.
227 * Receives the bitmask of valid TX antennas and the *index* used
228 * for the last TX, and returns the next valid *index* to use.
229 * In order to set it in the tx_cmd, must do BIT(idx).
230 */
iwl_mvm_next_antenna(struct iwl_mvm * mvm,u8 valid,u8 last_idx)231 u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
232 {
233 u8 ind = last_idx;
234 int i;
235
236 for (i = 0; i < MAX_ANT_NUM; i++) {
237 ind = (ind + 1) % MAX_ANT_NUM;
238 if (valid & BIT(ind))
239 return ind;
240 }
241
242 WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
243 return last_idx;
244 }
245
246 /**
247 * iwl_mvm_send_lq_cmd() - Send link quality command
248 * @mvm: Driver data.
249 * @lq: Link quality command to send.
250 *
251 * The link quality command is sent as the last step of station creation.
252 * This is the special case in which init is set and we call a callback in
253 * this case to clear the state indicating that station creation is in
254 * progress.
255 */
iwl_mvm_send_lq_cmd(struct iwl_mvm * mvm,struct iwl_lq_cmd * lq)256 int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq)
257 {
258 struct iwl_host_cmd cmd = {
259 .id = LQ_CMD,
260 .len = { sizeof(struct iwl_lq_cmd), },
261 .flags = CMD_ASYNC,
262 .data = { lq, },
263 };
264
265 if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA ||
266 iwl_mvm_has_tlc_offload(mvm)))
267 return -EINVAL;
268
269 return iwl_mvm_send_cmd(mvm, &cmd);
270 }
271
272 /**
273 * iwl_mvm_update_smps - Get a request to change the SMPS mode
274 * @mvm: Driver data.
275 * @vif: Pointer to the ieee80211_vif structure
276 * @req_type: The part of the driver who call for a change.
277 * @smps_request: The request to change the SMPS mode.
278 * @link_id: for MLO link_id, otherwise 0 (deflink)
279 *
280 * Get a requst to change the SMPS mode,
281 * and change it according to all other requests in the driver.
282 */
iwl_mvm_update_smps(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum iwl_mvm_smps_type_request req_type,enum ieee80211_smps_mode smps_request,unsigned int link_id)283 void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
284 enum iwl_mvm_smps_type_request req_type,
285 enum ieee80211_smps_mode smps_request,
286 unsigned int link_id)
287 {
288 struct iwl_mvm_vif *mvmvif;
289 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
290 int i;
291
292 lockdep_assert_held(&mvm->mutex);
293
294 /* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
295 if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
296 return;
297
298 if (vif->type != NL80211_IFTYPE_STATION)
299 return;
300
301 mvmvif = iwl_mvm_vif_from_mac80211(vif);
302
303 if (WARN_ON_ONCE(!mvmvif->link[link_id]))
304 return;
305
306 mvmvif->link[link_id]->smps_requests[req_type] = smps_request;
307 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
308 if (mvmvif->link[link_id]->smps_requests[i] ==
309 IEEE80211_SMPS_STATIC) {
310 smps_mode = IEEE80211_SMPS_STATIC;
311 break;
312 }
313 if (mvmvif->link[link_id]->smps_requests[i] ==
314 IEEE80211_SMPS_DYNAMIC)
315 smps_mode = IEEE80211_SMPS_DYNAMIC;
316 }
317
318 /* SMPS is disabled in eSR */
319 if (mvmvif->esr_active)
320 smps_mode = IEEE80211_SMPS_OFF;
321
322 ieee80211_request_smps(vif, link_id, smps_mode);
323 }
324
iwl_mvm_update_smps_on_active_links(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum iwl_mvm_smps_type_request req_type,enum ieee80211_smps_mode smps_request)325 void iwl_mvm_update_smps_on_active_links(struct iwl_mvm *mvm,
326 struct ieee80211_vif *vif,
327 enum iwl_mvm_smps_type_request req_type,
328 enum ieee80211_smps_mode smps_request)
329 {
330 struct ieee80211_bss_conf *link_conf;
331 unsigned int link_id;
332
333 rcu_read_lock();
334 for_each_vif_active_link(vif, link_conf, link_id)
335 iwl_mvm_update_smps(mvm, vif, req_type, smps_request,
336 link_id);
337 rcu_read_unlock();
338 }
339
iwl_wait_stats_complete(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)340 static bool iwl_wait_stats_complete(struct iwl_notif_wait_data *notif_wait,
341 struct iwl_rx_packet *pkt, void *data)
342 {
343 WARN_ON(pkt->hdr.cmd != STATISTICS_NOTIFICATION);
344
345 return true;
346 }
347
iwl_mvm_request_statistics(struct iwl_mvm * mvm,bool clear)348 int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
349 {
350 struct iwl_statistics_cmd scmd = {
351 .flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
352 };
353
354 struct iwl_host_cmd cmd = {
355 .id = STATISTICS_CMD,
356 .len[0] = sizeof(scmd),
357 .data[0] = &scmd,
358 };
359 int ret;
360
361 /* From version 15 - STATISTICS_NOTIFICATION, the reply for
362 * STATISTICS_CMD is empty, and the response is with
363 * STATISTICS_NOTIFICATION notification
364 */
365 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
366 STATISTICS_NOTIFICATION, 0) < 15) {
367 cmd.flags = CMD_WANT_SKB;
368
369 ret = iwl_mvm_send_cmd(mvm, &cmd);
370 if (ret)
371 return ret;
372
373 iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
374 iwl_free_resp(&cmd);
375 } else {
376 struct iwl_notification_wait stats_wait;
377 static const u16 stats_complete[] = {
378 STATISTICS_NOTIFICATION,
379 };
380
381 iwl_init_notification_wait(&mvm->notif_wait, &stats_wait,
382 stats_complete, ARRAY_SIZE(stats_complete),
383 iwl_wait_stats_complete, NULL);
384
385 ret = iwl_mvm_send_cmd(mvm, &cmd);
386 if (ret) {
387 iwl_remove_notification(&mvm->notif_wait, &stats_wait);
388 return ret;
389 }
390
391 /* 200ms should be enough for FW to collect data from all
392 * LMACs and send STATISTICS_NOTIFICATION to host
393 */
394 ret = iwl_wait_notification(&mvm->notif_wait, &stats_wait, HZ / 5);
395 if (ret)
396 return ret;
397 }
398
399 if (clear)
400 iwl_mvm_accu_radio_stats(mvm);
401
402 return 0;
403 }
404
iwl_mvm_accu_radio_stats(struct iwl_mvm * mvm)405 void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
406 {
407 mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
408 mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
409 mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
410 mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
411 }
412
413 struct iwl_mvm_diversity_iter_data {
414 struct iwl_mvm_phy_ctxt *ctxt;
415 bool result;
416 };
417
iwl_mvm_diversity_iter(void * _data,u8 * mac,struct ieee80211_vif * vif)418 static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
419 struct ieee80211_vif *vif)
420 {
421 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
422 struct iwl_mvm_diversity_iter_data *data = _data;
423 int i, link_id;
424
425 for_each_mvm_vif_valid_link(mvmvif, link_id) {
426 struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id];
427
428 if (link_info->phy_ctxt != data->ctxt)
429 continue;
430
431 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
432 if (link_info->smps_requests[i] == IEEE80211_SMPS_STATIC ||
433 link_info->smps_requests[i] == IEEE80211_SMPS_DYNAMIC) {
434 data->result = false;
435 break;
436 }
437 }
438 }
439 }
440
iwl_mvm_rx_diversity_allowed(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt)441 bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm,
442 struct iwl_mvm_phy_ctxt *ctxt)
443 {
444 struct iwl_mvm_diversity_iter_data data = {
445 .ctxt = ctxt,
446 .result = true,
447 };
448
449 lockdep_assert_held(&mvm->mutex);
450
451 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
452 return false;
453
454 if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
455 return false;
456
457 if (mvm->cfg->rx_with_siso_diversity)
458 return false;
459
460 ieee80211_iterate_active_interfaces_atomic(
461 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
462 iwl_mvm_diversity_iter, &data);
463
464 return data.result;
465 }
466
iwl_mvm_send_low_latency_cmd(struct iwl_mvm * mvm,bool low_latency,u16 mac_id)467 void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm,
468 bool low_latency, u16 mac_id)
469 {
470 struct iwl_mac_low_latency_cmd cmd = {
471 .mac_id = cpu_to_le32(mac_id)
472 };
473
474 if (!fw_has_capa(&mvm->fw->ucode_capa,
475 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
476 return;
477
478 if (low_latency) {
479 /* currently we don't care about the direction */
480 cmd.low_latency_rx = 1;
481 cmd.low_latency_tx = 1;
482 }
483
484 if (iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, LOW_LATENCY_CMD),
485 0, sizeof(cmd), &cmd))
486 IWL_ERR(mvm, "Failed to send low latency command\n");
487 }
488
iwl_mvm_update_low_latency(struct iwl_mvm * mvm,struct ieee80211_vif * vif,bool low_latency,enum iwl_mvm_low_latency_cause cause)489 int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
490 bool low_latency,
491 enum iwl_mvm_low_latency_cause cause)
492 {
493 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
494 int res;
495 bool prev;
496
497 lockdep_assert_held(&mvm->mutex);
498
499 prev = iwl_mvm_vif_low_latency(mvmvif);
500 iwl_mvm_vif_set_low_latency(mvmvif, low_latency, cause);
501
502 low_latency = iwl_mvm_vif_low_latency(mvmvif);
503
504 if (low_latency == prev)
505 return 0;
506
507 iwl_mvm_send_low_latency_cmd(mvm, low_latency, mvmvif->id);
508
509 res = iwl_mvm_update_quotas(mvm, false, NULL);
510 if (res)
511 return res;
512
513 iwl_mvm_bt_coex_vif_change(mvm);
514
515 return iwl_mvm_power_update_mac(mvm);
516 }
517
518 struct iwl_mvm_low_latency_iter {
519 bool result;
520 bool result_per_band[NUM_NL80211_BANDS];
521 };
522
iwl_mvm_ll_iter(void * _data,u8 * mac,struct ieee80211_vif * vif)523 static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
524 {
525 struct iwl_mvm_low_latency_iter *result = _data;
526 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
527 enum nl80211_band band;
528
529 if (iwl_mvm_vif_low_latency(mvmvif)) {
530 result->result = true;
531
532 if (!mvmvif->deflink.phy_ctxt)
533 return;
534
535 band = mvmvif->deflink.phy_ctxt->channel->band;
536 result->result_per_band[band] = true;
537 }
538 }
539
iwl_mvm_low_latency(struct iwl_mvm * mvm)540 bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
541 {
542 struct iwl_mvm_low_latency_iter data = {};
543
544 ieee80211_iterate_active_interfaces_atomic(
545 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
546 iwl_mvm_ll_iter, &data);
547
548 return data.result;
549 }
550
iwl_mvm_low_latency_band(struct iwl_mvm * mvm,enum nl80211_band band)551 bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band)
552 {
553 struct iwl_mvm_low_latency_iter data = {};
554
555 ieee80211_iterate_active_interfaces_atomic(
556 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
557 iwl_mvm_ll_iter, &data);
558
559 return data.result_per_band[band];
560 }
561
562 struct iwl_bss_iter_data {
563 struct ieee80211_vif *vif;
564 bool error;
565 };
566
iwl_mvm_bss_iface_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)567 static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
568 struct ieee80211_vif *vif)
569 {
570 struct iwl_bss_iter_data *data = _data;
571
572 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
573 return;
574
575 if (data->vif) {
576 data->error = true;
577 return;
578 }
579
580 data->vif = vif;
581 }
582
iwl_mvm_get_bss_vif(struct iwl_mvm * mvm)583 struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
584 {
585 struct iwl_bss_iter_data bss_iter_data = {};
586
587 ieee80211_iterate_active_interfaces_atomic(
588 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
589 iwl_mvm_bss_iface_iterator, &bss_iter_data);
590
591 if (bss_iter_data.error) {
592 IWL_ERR(mvm, "More than one managed interface active!\n");
593 return ERR_PTR(-EINVAL);
594 }
595
596 return bss_iter_data.vif;
597 }
598
599 struct iwl_bss_find_iter_data {
600 struct ieee80211_vif *vif;
601 u32 macid;
602 };
603
iwl_mvm_bss_find_iface_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)604 static void iwl_mvm_bss_find_iface_iterator(void *_data, u8 *mac,
605 struct ieee80211_vif *vif)
606 {
607 struct iwl_bss_find_iter_data *data = _data;
608 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
609
610 if (mvmvif->id == data->macid)
611 data->vif = vif;
612 }
613
iwl_mvm_get_vif_by_macid(struct iwl_mvm * mvm,u32 macid)614 struct ieee80211_vif *iwl_mvm_get_vif_by_macid(struct iwl_mvm *mvm, u32 macid)
615 {
616 struct iwl_bss_find_iter_data data = {
617 .macid = macid,
618 };
619
620 lockdep_assert_held(&mvm->mutex);
621
622 ieee80211_iterate_active_interfaces_atomic(
623 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
624 iwl_mvm_bss_find_iface_iterator, &data);
625
626 return data.vif;
627 }
628
629 struct iwl_sta_iter_data {
630 bool assoc;
631 };
632
iwl_mvm_sta_iface_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)633 static void iwl_mvm_sta_iface_iterator(void *_data, u8 *mac,
634 struct ieee80211_vif *vif)
635 {
636 struct iwl_sta_iter_data *data = _data;
637
638 if (vif->type != NL80211_IFTYPE_STATION)
639 return;
640
641 if (vif->cfg.assoc)
642 data->assoc = true;
643 }
644
iwl_mvm_is_vif_assoc(struct iwl_mvm * mvm)645 bool iwl_mvm_is_vif_assoc(struct iwl_mvm *mvm)
646 {
647 struct iwl_sta_iter_data data = {
648 .assoc = false,
649 };
650
651 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
652 IEEE80211_IFACE_ITER_NORMAL,
653 iwl_mvm_sta_iface_iterator,
654 &data);
655 return data.assoc;
656 }
657
iwl_mvm_get_wd_timeout(struct iwl_mvm * mvm,struct ieee80211_vif * vif,bool tdls,bool cmd_q)658 unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
659 struct ieee80211_vif *vif,
660 bool tdls, bool cmd_q)
661 {
662 struct iwl_fw_dbg_trigger_tlv *trigger;
663 struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
664 unsigned int default_timeout = cmd_q ?
665 IWL_DEF_WD_TIMEOUT :
666 mvm->trans->trans_cfg->base_params->wd_timeout;
667
668 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS)) {
669 /*
670 * We can't know when the station is asleep or awake, so we
671 * must disable the queue hang detection.
672 */
673 if (fw_has_capa(&mvm->fw->ucode_capa,
674 IWL_UCODE_TLV_CAPA_STA_PM_NOTIF) &&
675 vif && vif->type == NL80211_IFTYPE_AP)
676 return IWL_WATCHDOG_DISABLED;
677 return default_timeout;
678 }
679
680 trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
681 txq_timer = (void *)trigger->data;
682
683 if (tdls)
684 return le32_to_cpu(txq_timer->tdls);
685
686 if (cmd_q)
687 return le32_to_cpu(txq_timer->command_queue);
688
689 if (WARN_ON(!vif))
690 return default_timeout;
691
692 switch (ieee80211_vif_type_p2p(vif)) {
693 case NL80211_IFTYPE_ADHOC:
694 return le32_to_cpu(txq_timer->ibss);
695 case NL80211_IFTYPE_STATION:
696 return le32_to_cpu(txq_timer->bss);
697 case NL80211_IFTYPE_AP:
698 return le32_to_cpu(txq_timer->softap);
699 case NL80211_IFTYPE_P2P_CLIENT:
700 return le32_to_cpu(txq_timer->p2p_client);
701 case NL80211_IFTYPE_P2P_GO:
702 return le32_to_cpu(txq_timer->p2p_go);
703 case NL80211_IFTYPE_P2P_DEVICE:
704 return le32_to_cpu(txq_timer->p2p_device);
705 case NL80211_IFTYPE_MONITOR:
706 return default_timeout;
707 default:
708 WARN_ON(1);
709 return mvm->trans->trans_cfg->base_params->wd_timeout;
710 }
711 }
712
iwl_mvm_connection_loss(struct iwl_mvm * mvm,struct ieee80211_vif * vif,const char * errmsg)713 void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
714 const char *errmsg)
715 {
716 struct iwl_fw_dbg_trigger_tlv *trig;
717 struct iwl_fw_dbg_trigger_mlme *trig_mlme;
718
719 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
720 FW_DBG_TRIGGER_MLME);
721 if (!trig)
722 goto out;
723
724 trig_mlme = (void *)trig->data;
725
726 if (trig_mlme->stop_connection_loss &&
727 --trig_mlme->stop_connection_loss)
728 goto out;
729
730 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "%s", errmsg);
731
732 out:
733 ieee80211_connection_loss(vif);
734 }
735
iwl_mvm_event_frame_timeout_callback(struct iwl_mvm * mvm,struct ieee80211_vif * vif,const struct ieee80211_sta * sta,u16 tid)736 void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
737 struct ieee80211_vif *vif,
738 const struct ieee80211_sta *sta,
739 u16 tid)
740 {
741 struct iwl_fw_dbg_trigger_tlv *trig;
742 struct iwl_fw_dbg_trigger_ba *ba_trig;
743
744 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
745 FW_DBG_TRIGGER_BA);
746 if (!trig)
747 return;
748
749 ba_trig = (void *)trig->data;
750
751 if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(tid)))
752 return;
753
754 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
755 "Frame from %pM timed out, tid %d",
756 sta->addr, tid);
757 }
758
iwl_mvm_tcm_load_percentage(u32 airtime,u32 elapsed)759 u8 iwl_mvm_tcm_load_percentage(u32 airtime, u32 elapsed)
760 {
761 if (!elapsed)
762 return 0;
763
764 return (100 * airtime / elapsed) / USEC_PER_MSEC;
765 }
766
767 static enum iwl_mvm_traffic_load
iwl_mvm_tcm_load(struct iwl_mvm * mvm,u32 airtime,unsigned long elapsed)768 iwl_mvm_tcm_load(struct iwl_mvm *mvm, u32 airtime, unsigned long elapsed)
769 {
770 u8 load = iwl_mvm_tcm_load_percentage(airtime, elapsed);
771
772 if (load > IWL_MVM_TCM_LOAD_HIGH_THRESH)
773 return IWL_MVM_TRAFFIC_HIGH;
774 if (load > IWL_MVM_TCM_LOAD_MEDIUM_THRESH)
775 return IWL_MVM_TRAFFIC_MEDIUM;
776
777 return IWL_MVM_TRAFFIC_LOW;
778 }
779
iwl_mvm_tcm_iter(void * _data,u8 * mac,struct ieee80211_vif * vif)780 static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
781 {
782 struct iwl_mvm *mvm = _data;
783 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
784 bool low_latency, prev = mvmvif->low_latency & LOW_LATENCY_TRAFFIC;
785
786 if (mvmvif->id >= NUM_MAC_INDEX_DRIVER)
787 return;
788
789 low_latency = mvm->tcm.result.low_latency[mvmvif->id];
790
791 if (!mvm->tcm.result.change[mvmvif->id] &&
792 prev == low_latency) {
793 iwl_mvm_update_quotas(mvm, false, NULL);
794 return;
795 }
796
797 if (prev != low_latency) {
798 /* this sends traffic load and updates quota as well */
799 iwl_mvm_update_low_latency(mvm, vif, low_latency,
800 LOW_LATENCY_TRAFFIC);
801 } else {
802 iwl_mvm_update_quotas(mvm, false, NULL);
803 }
804 }
805
iwl_mvm_tcm_results(struct iwl_mvm * mvm)806 static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
807 {
808 mutex_lock(&mvm->mutex);
809
810 ieee80211_iterate_active_interfaces(
811 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
812 iwl_mvm_tcm_iter, mvm);
813
814 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
815 iwl_mvm_config_scan(mvm);
816
817 mutex_unlock(&mvm->mutex);
818 }
819
iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct * wk)820 static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
821 {
822 struct iwl_mvm *mvm;
823 struct iwl_mvm_vif *mvmvif;
824 struct ieee80211_vif *vif;
825
826 mvmvif = container_of(wk, struct iwl_mvm_vif,
827 uapsd_nonagg_detected_wk.work);
828 vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
829 mvm = mvmvif->mvm;
830
831 if (mvm->tcm.data[mvmvif->id].opened_rx_ba_sessions)
832 return;
833
834 /* remember that this AP is broken */
835 memcpy(mvm->uapsd_noagg_bssids[mvm->uapsd_noagg_bssid_write_idx].addr,
836 vif->bss_conf.bssid, ETH_ALEN);
837 mvm->uapsd_noagg_bssid_write_idx++;
838 if (mvm->uapsd_noagg_bssid_write_idx >= IWL_MVM_UAPSD_NOAGG_LIST_LEN)
839 mvm->uapsd_noagg_bssid_write_idx = 0;
840
841 iwl_mvm_connection_loss(mvm, vif,
842 "AP isn't using AMPDU with uAPSD enabled");
843 }
844
iwl_mvm_uapsd_agg_disconnect(struct iwl_mvm * mvm,struct ieee80211_vif * vif)845 static void iwl_mvm_uapsd_agg_disconnect(struct iwl_mvm *mvm,
846 struct ieee80211_vif *vif)
847 {
848 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
849
850 if (vif->type != NL80211_IFTYPE_STATION)
851 return;
852
853 if (!vif->cfg.assoc)
854 return;
855
856 if (!mvmvif->deflink.queue_params[IEEE80211_AC_VO].uapsd &&
857 !mvmvif->deflink.queue_params[IEEE80211_AC_VI].uapsd &&
858 !mvmvif->deflink.queue_params[IEEE80211_AC_BE].uapsd &&
859 !mvmvif->deflink.queue_params[IEEE80211_AC_BK].uapsd)
860 return;
861
862 if (mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected)
863 return;
864
865 mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected = true;
866 IWL_INFO(mvm,
867 "detected AP should do aggregation but isn't, likely due to U-APSD\n");
868 schedule_delayed_work(&mvmvif->uapsd_nonagg_detected_wk,
869 15 * HZ);
870 }
871
iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm * mvm,unsigned int elapsed,int mac)872 static void iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm *mvm,
873 unsigned int elapsed,
874 int mac)
875 {
876 u64 bytes = mvm->tcm.data[mac].uapsd_nonagg_detect.rx_bytes;
877 u64 tpt;
878 unsigned long rate;
879 struct ieee80211_vif *vif;
880
881 rate = ewma_rate_read(&mvm->tcm.data[mac].uapsd_nonagg_detect.rate);
882
883 if (!rate || mvm->tcm.data[mac].opened_rx_ba_sessions ||
884 mvm->tcm.data[mac].uapsd_nonagg_detect.detected)
885 return;
886
887 if (iwl_mvm_has_new_rx_api(mvm)) {
888 tpt = 8 * bytes; /* kbps */
889 do_div(tpt, elapsed);
890 rate *= 1000; /* kbps */
891 if (tpt < 22 * rate / 100)
892 return;
893 } else {
894 /*
895 * the rate here is actually the threshold, in 100Kbps units,
896 * so do the needed conversion from bytes to 100Kbps:
897 * 100kb = bits / (100 * 1000),
898 * 100kbps = 100kb / (msecs / 1000) ==
899 * (bits / (100 * 1000)) / (msecs / 1000) ==
900 * bits / (100 * msecs)
901 */
902 tpt = (8 * bytes);
903 do_div(tpt, elapsed * 100);
904 if (tpt < rate)
905 return;
906 }
907
908 rcu_read_lock();
909 vif = rcu_dereference(mvm->vif_id_to_mac[mac]);
910 if (vif)
911 iwl_mvm_uapsd_agg_disconnect(mvm, vif);
912 rcu_read_unlock();
913 }
914
iwl_mvm_tcm_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)915 static void iwl_mvm_tcm_iterator(void *_data, u8 *mac,
916 struct ieee80211_vif *vif)
917 {
918 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
919 u32 *band = _data;
920
921 if (!mvmvif->deflink.phy_ctxt)
922 return;
923
924 band[mvmvif->id] = mvmvif->deflink.phy_ctxt->channel->band;
925 }
926
iwl_mvm_calc_tcm_stats(struct iwl_mvm * mvm,unsigned long ts,bool handle_uapsd)927 static unsigned long iwl_mvm_calc_tcm_stats(struct iwl_mvm *mvm,
928 unsigned long ts,
929 bool handle_uapsd)
930 {
931 unsigned int elapsed = jiffies_to_msecs(ts - mvm->tcm.ts);
932 unsigned int uapsd_elapsed =
933 jiffies_to_msecs(ts - mvm->tcm.uapsd_nonagg_ts);
934 u32 total_airtime = 0;
935 u32 band_airtime[NUM_NL80211_BANDS] = {0};
936 u32 band[NUM_MAC_INDEX_DRIVER] = {0};
937 int ac, mac, i;
938 bool low_latency = false;
939 enum iwl_mvm_traffic_load load, band_load;
940 bool handle_ll = time_after(ts, mvm->tcm.ll_ts + MVM_LL_PERIOD);
941
942 if (handle_ll)
943 mvm->tcm.ll_ts = ts;
944 if (handle_uapsd)
945 mvm->tcm.uapsd_nonagg_ts = ts;
946
947 mvm->tcm.result.elapsed = elapsed;
948
949 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
950 IEEE80211_IFACE_ITER_NORMAL,
951 iwl_mvm_tcm_iterator,
952 &band);
953
954 for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
955 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
956 u32 vo_vi_pkts = 0;
957 u32 airtime = mdata->rx.airtime + mdata->tx.airtime;
958
959 total_airtime += airtime;
960 band_airtime[band[mac]] += airtime;
961
962 load = iwl_mvm_tcm_load(mvm, airtime, elapsed);
963 mvm->tcm.result.change[mac] = load != mvm->tcm.result.load[mac];
964 mvm->tcm.result.load[mac] = load;
965 mvm->tcm.result.airtime[mac] = airtime;
966
967 for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_VI; ac++)
968 vo_vi_pkts += mdata->rx.pkts[ac] +
969 mdata->tx.pkts[ac];
970
971 /* enable immediately with enough packets but defer disabling */
972 if (vo_vi_pkts > IWL_MVM_TCM_LOWLAT_ENABLE_THRESH)
973 mvm->tcm.result.low_latency[mac] = true;
974 else if (handle_ll)
975 mvm->tcm.result.low_latency[mac] = false;
976
977 if (handle_ll) {
978 /* clear old data */
979 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
980 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
981 }
982 low_latency |= mvm->tcm.result.low_latency[mac];
983
984 if (!mvm->tcm.result.low_latency[mac] && handle_uapsd)
985 iwl_mvm_check_uapsd_agg_expected_tpt(mvm, uapsd_elapsed,
986 mac);
987 /* clear old data */
988 if (handle_uapsd)
989 mdata->uapsd_nonagg_detect.rx_bytes = 0;
990 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
991 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
992 }
993
994 load = iwl_mvm_tcm_load(mvm, total_airtime, elapsed);
995 mvm->tcm.result.global_load = load;
996
997 for (i = 0; i < NUM_NL80211_BANDS; i++) {
998 band_load = iwl_mvm_tcm_load(mvm, band_airtime[i], elapsed);
999 mvm->tcm.result.band_load[i] = band_load;
1000 }
1001
1002 /*
1003 * If the current load isn't low we need to force re-evaluation
1004 * in the TCM period, so that we can return to low load if there
1005 * was no traffic at all (and thus iwl_mvm_recalc_tcm didn't get
1006 * triggered by traffic).
1007 */
1008 if (load != IWL_MVM_TRAFFIC_LOW)
1009 return MVM_TCM_PERIOD;
1010 /*
1011 * If low-latency is active we need to force re-evaluation after
1012 * (the longer) MVM_LL_PERIOD, so that we can disable low-latency
1013 * when there's no traffic at all.
1014 */
1015 if (low_latency)
1016 return MVM_LL_PERIOD;
1017 /*
1018 * Otherwise, we don't need to run the work struct because we're
1019 * in the default "idle" state - traffic indication is low (which
1020 * also covers the "no traffic" case) and low-latency is disabled
1021 * so there's no state that may need to be disabled when there's
1022 * no traffic at all.
1023 *
1024 * Note that this has no impact on the regular scheduling of the
1025 * updates triggered by traffic - those happen whenever one of the
1026 * two timeouts expire (if there's traffic at all.)
1027 */
1028 return 0;
1029 }
1030
iwl_mvm_recalc_tcm(struct iwl_mvm * mvm)1031 void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
1032 {
1033 unsigned long ts = jiffies;
1034 bool handle_uapsd =
1035 time_after(ts, mvm->tcm.uapsd_nonagg_ts +
1036 msecs_to_jiffies(IWL_MVM_UAPSD_NONAGG_PERIOD));
1037
1038 spin_lock(&mvm->tcm.lock);
1039 if (mvm->tcm.paused || !time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1040 spin_unlock(&mvm->tcm.lock);
1041 return;
1042 }
1043 spin_unlock(&mvm->tcm.lock);
1044
1045 if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
1046 mutex_lock(&mvm->mutex);
1047 if (iwl_mvm_request_statistics(mvm, true))
1048 handle_uapsd = false;
1049 mutex_unlock(&mvm->mutex);
1050 }
1051
1052 spin_lock(&mvm->tcm.lock);
1053 /* re-check if somebody else won the recheck race */
1054 if (!mvm->tcm.paused && time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1055 /* calculate statistics */
1056 unsigned long work_delay = iwl_mvm_calc_tcm_stats(mvm, ts,
1057 handle_uapsd);
1058
1059 /* the memset needs to be visible before the timestamp */
1060 smp_mb();
1061 mvm->tcm.ts = ts;
1062 if (work_delay)
1063 schedule_delayed_work(&mvm->tcm.work, work_delay);
1064 }
1065 spin_unlock(&mvm->tcm.lock);
1066
1067 iwl_mvm_tcm_results(mvm);
1068 }
1069
iwl_mvm_tcm_work(struct work_struct * work)1070 void iwl_mvm_tcm_work(struct work_struct *work)
1071 {
1072 struct delayed_work *delayed_work = to_delayed_work(work);
1073 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1074 tcm.work);
1075
1076 iwl_mvm_recalc_tcm(mvm);
1077 }
1078
iwl_mvm_pause_tcm(struct iwl_mvm * mvm,bool with_cancel)1079 void iwl_mvm_pause_tcm(struct iwl_mvm *mvm, bool with_cancel)
1080 {
1081 spin_lock_bh(&mvm->tcm.lock);
1082 mvm->tcm.paused = true;
1083 spin_unlock_bh(&mvm->tcm.lock);
1084 if (with_cancel)
1085 cancel_delayed_work_sync(&mvm->tcm.work);
1086 }
1087
iwl_mvm_resume_tcm(struct iwl_mvm * mvm)1088 void iwl_mvm_resume_tcm(struct iwl_mvm *mvm)
1089 {
1090 int mac;
1091 bool low_latency = false;
1092
1093 spin_lock_bh(&mvm->tcm.lock);
1094 mvm->tcm.ts = jiffies;
1095 mvm->tcm.ll_ts = jiffies;
1096 for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1097 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1098
1099 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1100 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1101 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1102 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1103
1104 if (mvm->tcm.result.low_latency[mac])
1105 low_latency = true;
1106 }
1107 /* The TCM data needs to be reset before "paused" flag changes */
1108 smp_mb();
1109 mvm->tcm.paused = false;
1110
1111 /*
1112 * if the current load is not low or low latency is active, force
1113 * re-evaluation to cover the case of no traffic.
1114 */
1115 if (mvm->tcm.result.global_load > IWL_MVM_TRAFFIC_LOW)
1116 schedule_delayed_work(&mvm->tcm.work, MVM_TCM_PERIOD);
1117 else if (low_latency)
1118 schedule_delayed_work(&mvm->tcm.work, MVM_LL_PERIOD);
1119
1120 spin_unlock_bh(&mvm->tcm.lock);
1121 }
1122
iwl_mvm_tcm_add_vif(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1123 void iwl_mvm_tcm_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1124 {
1125 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1126
1127 INIT_DELAYED_WORK(&mvmvif->uapsd_nonagg_detected_wk,
1128 iwl_mvm_tcm_uapsd_nonagg_detected_wk);
1129 }
1130
iwl_mvm_tcm_rm_vif(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1131 void iwl_mvm_tcm_rm_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1132 {
1133 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1134
1135 cancel_delayed_work_sync(&mvmvif->uapsd_nonagg_detected_wk);
1136 }
1137
iwl_mvm_get_systime(struct iwl_mvm * mvm)1138 u32 iwl_mvm_get_systime(struct iwl_mvm *mvm)
1139 {
1140 u32 reg_addr = DEVICE_SYSTEM_TIME_REG;
1141
1142 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_22000 &&
1143 mvm->trans->cfg->gp2_reg_addr)
1144 reg_addr = mvm->trans->cfg->gp2_reg_addr;
1145
1146 return iwl_read_prph(mvm->trans, reg_addr);
1147 }
1148
iwl_mvm_get_sync_time(struct iwl_mvm * mvm,int clock_type,u32 * gp2,u64 * boottime,ktime_t * realtime)1149 void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, int clock_type,
1150 u32 *gp2, u64 *boottime, ktime_t *realtime)
1151 {
1152 bool ps_disabled;
1153
1154 lockdep_assert_held(&mvm->mutex);
1155
1156 /* Disable power save when reading GP2 */
1157 ps_disabled = mvm->ps_disabled;
1158 if (!ps_disabled) {
1159 mvm->ps_disabled = true;
1160 iwl_mvm_power_update_device(mvm);
1161 }
1162
1163 *gp2 = iwl_mvm_get_systime(mvm);
1164
1165 if (clock_type == CLOCK_BOOTTIME && boottime)
1166 *boottime = ktime_get_boottime_ns();
1167 else if (clock_type == CLOCK_REALTIME && realtime)
1168 *realtime = ktime_get_real();
1169
1170 if (!ps_disabled) {
1171 mvm->ps_disabled = ps_disabled;
1172 iwl_mvm_power_update_device(mvm);
1173 }
1174 }
1175
1176 /* Find if at least two links from different vifs use same channel
1177 * FIXME: consider having a refcount array in struct iwl_mvm_vif for
1178 * used phy_ctxt ids.
1179 */
iwl_mvm_have_links_same_channel(struct iwl_mvm_vif * vif1,struct iwl_mvm_vif * vif2)1180 bool iwl_mvm_have_links_same_channel(struct iwl_mvm_vif *vif1,
1181 struct iwl_mvm_vif *vif2)
1182 {
1183 unsigned int i, j;
1184
1185 for_each_mvm_vif_valid_link(vif1, i) {
1186 for_each_mvm_vif_valid_link(vif2, j) {
1187 if (vif1->link[i]->phy_ctxt == vif2->link[j]->phy_ctxt)
1188 return true;
1189 }
1190 }
1191
1192 return false;
1193 }
1194
iwl_mvm_vif_is_active(struct iwl_mvm_vif * mvmvif)1195 bool iwl_mvm_vif_is_active(struct iwl_mvm_vif *mvmvif)
1196 {
1197 unsigned int i;
1198
1199 /* FIXME: can it fail when phy_ctxt is assigned? */
1200 for_each_mvm_vif_valid_link(mvmvif, i) {
1201 if (mvmvif->link[i]->phy_ctxt &&
1202 mvmvif->link[i]->phy_ctxt->id < NUM_PHY_CTX)
1203 return true;
1204 }
1205
1206 return false;
1207 }
1208