1 /******************************************************************************
2  *
3  * This file is provided under a dual BSD/GPLv2 license.  When using or
4  * redistributing this file, you may do so under either license.
5  *
6  * GPL LICENSE SUMMARY
7  *
8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
11  * Copyright (C) 2018 - 2019 Intel Corporation
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of version 2 of the GNU General Public License as
15  * published by the Free Software Foundation.
16  *
17  * This program is distributed in the hope that it will be useful, but
18  * WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
20  * General Public License for more details.
21  *
22  * The full GNU General Public License is included in this distribution
23  * in the file called COPYING.
24  *
25  * Contact Information:
26  *  Intel Linux Wireless <linuxwifi@intel.com>
27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28  *
29  * BSD LICENSE
30  *
31  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
32  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
33  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
34  * Copyright (C) 2018 - 2019 Intel Corporation
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63  *****************************************************************************/
64 
65 #include <linux/kernel.h>
66 #include <linux/module.h>
67 #include <linux/slab.h>
68 #include <linux/etherdevice.h>
69 
70 #include <net/mac80211.h>
71 
72 #include "iwl-debug.h"
73 #include "mvm.h"
74 #include "iwl-modparams.h"
75 #include "fw/api/power.h"
76 
77 #define POWER_KEEP_ALIVE_PERIOD_SEC    25
78 
79 static
80 int iwl_mvm_beacon_filter_send_cmd(struct iwl_mvm *mvm,
81 				   struct iwl_beacon_filter_cmd *cmd,
82 				   u32 flags)
83 {
84 	u16 len;
85 
86 	IWL_DEBUG_POWER(mvm, "ba_enable_beacon_abort is: %d\n",
87 			le32_to_cpu(cmd->ba_enable_beacon_abort));
88 	IWL_DEBUG_POWER(mvm, "ba_escape_timer is: %d\n",
89 			le32_to_cpu(cmd->ba_escape_timer));
90 	IWL_DEBUG_POWER(mvm, "bf_debug_flag is: %d\n",
91 			le32_to_cpu(cmd->bf_debug_flag));
92 	IWL_DEBUG_POWER(mvm, "bf_enable_beacon_filter is: %d\n",
93 			le32_to_cpu(cmd->bf_enable_beacon_filter));
94 	IWL_DEBUG_POWER(mvm, "bf_energy_delta is: %d\n",
95 			le32_to_cpu(cmd->bf_energy_delta));
96 	IWL_DEBUG_POWER(mvm, "bf_escape_timer is: %d\n",
97 			le32_to_cpu(cmd->bf_escape_timer));
98 	IWL_DEBUG_POWER(mvm, "bf_roaming_energy_delta is: %d\n",
99 			le32_to_cpu(cmd->bf_roaming_energy_delta));
100 	IWL_DEBUG_POWER(mvm, "bf_roaming_state is: %d\n",
101 			le32_to_cpu(cmd->bf_roaming_state));
102 	IWL_DEBUG_POWER(mvm, "bf_temp_threshold is: %d\n",
103 			le32_to_cpu(cmd->bf_temp_threshold));
104 	IWL_DEBUG_POWER(mvm, "bf_temp_fast_filter is: %d\n",
105 			le32_to_cpu(cmd->bf_temp_fast_filter));
106 	IWL_DEBUG_POWER(mvm, "bf_temp_slow_filter is: %d\n",
107 			le32_to_cpu(cmd->bf_temp_slow_filter));
108 	IWL_DEBUG_POWER(mvm, "bf_threshold_absolute_low is: %d, %d\n",
109 			le32_to_cpu(cmd->bf_threshold_absolute_low[0]),
110 			le32_to_cpu(cmd->bf_threshold_absolute_low[1]));
111 
112 	IWL_DEBUG_POWER(mvm, "bf_threshold_absolute_high is: %d, %d\n",
113 			le32_to_cpu(cmd->bf_threshold_absolute_high[0]),
114 			le32_to_cpu(cmd->bf_threshold_absolute_high[1]));
115 
116 	if (fw_has_api(&mvm->fw->ucode_capa,
117 		       IWL_UCODE_TLV_API_BEACON_FILTER_V4))
118 		len = sizeof(struct iwl_beacon_filter_cmd);
119 	else
120 		len = offsetof(struct iwl_beacon_filter_cmd,
121 			       bf_threshold_absolute_low);
122 
123 	return iwl_mvm_send_cmd_pdu(mvm, REPLY_BEACON_FILTERING_CMD, flags,
124 				    len, cmd);
125 }
126 
127 static
128 void iwl_mvm_beacon_filter_set_cqm_params(struct iwl_mvm *mvm,
129 					  struct ieee80211_vif *vif,
130 					  struct iwl_beacon_filter_cmd *cmd)
131 {
132 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
133 
134 	if (vif->bss_conf.cqm_rssi_thold) {
135 		cmd->bf_energy_delta =
136 			cpu_to_le32(vif->bss_conf.cqm_rssi_hyst);
137 		/* fw uses an absolute value for this */
138 		cmd->bf_roaming_state =
139 			cpu_to_le32(-vif->bss_conf.cqm_rssi_thold);
140 	}
141 	cmd->ba_enable_beacon_abort = cpu_to_le32(mvmvif->bf_data.ba_enabled);
142 }
143 
144 static void iwl_mvm_power_log(struct iwl_mvm *mvm,
145 			      struct iwl_mac_power_cmd *cmd)
146 {
147 	IWL_DEBUG_POWER(mvm,
148 			"Sending power table command on mac id 0x%X for power level %d, flags = 0x%X\n",
149 			cmd->id_and_color, iwlmvm_mod_params.power_scheme,
150 			le16_to_cpu(cmd->flags));
151 	IWL_DEBUG_POWER(mvm, "Keep alive = %u sec\n",
152 			le16_to_cpu(cmd->keep_alive_seconds));
153 
154 	if (!(cmd->flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK))) {
155 		IWL_DEBUG_POWER(mvm, "Disable power management\n");
156 		return;
157 	}
158 
159 	IWL_DEBUG_POWER(mvm, "Rx timeout = %u usec\n",
160 			le32_to_cpu(cmd->rx_data_timeout));
161 	IWL_DEBUG_POWER(mvm, "Tx timeout = %u usec\n",
162 			le32_to_cpu(cmd->tx_data_timeout));
163 	if (cmd->flags & cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK))
164 		IWL_DEBUG_POWER(mvm, "DTIM periods to skip = %u\n",
165 				cmd->skip_dtim_periods);
166 	if (cmd->flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
167 		IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
168 				cmd->lprx_rssi_threshold);
169 	if (cmd->flags & cpu_to_le16(POWER_FLAGS_ADVANCE_PM_ENA_MSK)) {
170 		IWL_DEBUG_POWER(mvm, "uAPSD enabled\n");
171 		IWL_DEBUG_POWER(mvm, "Rx timeout (uAPSD) = %u usec\n",
172 				le32_to_cpu(cmd->rx_data_timeout_uapsd));
173 		IWL_DEBUG_POWER(mvm, "Tx timeout (uAPSD) = %u usec\n",
174 				le32_to_cpu(cmd->tx_data_timeout_uapsd));
175 		IWL_DEBUG_POWER(mvm, "QNDP TID = %d\n", cmd->qndp_tid);
176 		IWL_DEBUG_POWER(mvm, "ACs flags = 0x%x\n", cmd->uapsd_ac_flags);
177 		IWL_DEBUG_POWER(mvm, "Max SP = %d\n", cmd->uapsd_max_sp);
178 	}
179 }
180 
181 static void iwl_mvm_power_configure_uapsd(struct iwl_mvm *mvm,
182 					  struct ieee80211_vif *vif,
183 					  struct iwl_mac_power_cmd *cmd)
184 {
185 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
186 	enum ieee80211_ac_numbers ac;
187 	bool tid_found = false;
188 
189 #ifdef CONFIG_IWLWIFI_DEBUGFS
190 	/* set advanced pm flag with no uapsd ACs to enable ps-poll */
191 	if (mvmvif->dbgfs_pm.use_ps_poll) {
192 		cmd->flags |= cpu_to_le16(POWER_FLAGS_ADVANCE_PM_ENA_MSK);
193 		return;
194 	}
195 #endif
196 
197 	for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_BK; ac++) {
198 		if (!mvmvif->queue_params[ac].uapsd)
199 			continue;
200 
201 		if (mvm->fwrt.cur_fw_img != IWL_UCODE_WOWLAN)
202 			cmd->flags |=
203 				cpu_to_le16(POWER_FLAGS_ADVANCE_PM_ENA_MSK);
204 
205 		cmd->uapsd_ac_flags |= BIT(ac);
206 
207 		/* QNDP TID - the highest TID with no admission control */
208 		if (!tid_found && !mvmvif->queue_params[ac].acm) {
209 			tid_found = true;
210 			switch (ac) {
211 			case IEEE80211_AC_VO:
212 				cmd->qndp_tid = 6;
213 				break;
214 			case IEEE80211_AC_VI:
215 				cmd->qndp_tid = 5;
216 				break;
217 			case IEEE80211_AC_BE:
218 				cmd->qndp_tid = 0;
219 				break;
220 			case IEEE80211_AC_BK:
221 				cmd->qndp_tid = 1;
222 				break;
223 			}
224 		}
225 	}
226 
227 	cmd->flags |= cpu_to_le16(POWER_FLAGS_UAPSD_MISBEHAVING_ENA_MSK);
228 
229 	if (cmd->uapsd_ac_flags == (BIT(IEEE80211_AC_VO) |
230 				    BIT(IEEE80211_AC_VI) |
231 				    BIT(IEEE80211_AC_BE) |
232 				    BIT(IEEE80211_AC_BK))) {
233 		cmd->flags |= cpu_to_le16(POWER_FLAGS_SNOOZE_ENA_MSK);
234 		cmd->snooze_interval = cpu_to_le16(IWL_MVM_PS_SNOOZE_INTERVAL);
235 		cmd->snooze_window =
236 			(mvm->fwrt.cur_fw_img == IWL_UCODE_WOWLAN) ?
237 				cpu_to_le16(IWL_MVM_WOWLAN_PS_SNOOZE_WINDOW) :
238 				cpu_to_le16(IWL_MVM_PS_SNOOZE_WINDOW);
239 	}
240 
241 	cmd->uapsd_max_sp = mvm->hw->uapsd_max_sp_len;
242 
243 	if (mvm->fwrt.cur_fw_img == IWL_UCODE_WOWLAN || cmd->flags &
244 	    cpu_to_le16(POWER_FLAGS_SNOOZE_ENA_MSK)) {
245 		cmd->rx_data_timeout_uapsd =
246 			cpu_to_le32(IWL_MVM_WOWLAN_PS_RX_DATA_TIMEOUT);
247 		cmd->tx_data_timeout_uapsd =
248 			cpu_to_le32(IWL_MVM_WOWLAN_PS_TX_DATA_TIMEOUT);
249 	} else {
250 		cmd->rx_data_timeout_uapsd =
251 			cpu_to_le32(IWL_MVM_UAPSD_RX_DATA_TIMEOUT);
252 		cmd->tx_data_timeout_uapsd =
253 			cpu_to_le32(IWL_MVM_UAPSD_TX_DATA_TIMEOUT);
254 	}
255 
256 	if (cmd->flags & cpu_to_le16(POWER_FLAGS_SNOOZE_ENA_MSK)) {
257 		cmd->heavy_tx_thld_packets =
258 			IWL_MVM_PS_SNOOZE_HEAVY_TX_THLD_PACKETS;
259 		cmd->heavy_rx_thld_packets =
260 			IWL_MVM_PS_SNOOZE_HEAVY_RX_THLD_PACKETS;
261 	} else {
262 		cmd->heavy_tx_thld_packets =
263 			IWL_MVM_PS_HEAVY_TX_THLD_PACKETS;
264 		cmd->heavy_rx_thld_packets =
265 			IWL_MVM_PS_HEAVY_RX_THLD_PACKETS;
266 	}
267 	cmd->heavy_tx_thld_percentage =
268 		IWL_MVM_PS_HEAVY_TX_THLD_PERCENT;
269 	cmd->heavy_rx_thld_percentage =
270 		IWL_MVM_PS_HEAVY_RX_THLD_PERCENT;
271 }
272 
273 static void iwl_mvm_p2p_standalone_iterator(void *_data, u8 *mac,
274 					    struct ieee80211_vif *vif)
275 {
276 	bool *is_p2p_standalone = _data;
277 
278 	switch (ieee80211_vif_type_p2p(vif)) {
279 	case NL80211_IFTYPE_P2P_GO:
280 	case NL80211_IFTYPE_AP:
281 		*is_p2p_standalone = false;
282 		break;
283 	case NL80211_IFTYPE_STATION:
284 		if (vif->bss_conf.assoc)
285 			*is_p2p_standalone = false;
286 		break;
287 
288 	default:
289 		break;
290 	}
291 }
292 
293 static bool iwl_mvm_power_allow_uapsd(struct iwl_mvm *mvm,
294 				       struct ieee80211_vif *vif)
295 {
296 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
297 
298 	if (!memcmp(mvmvif->uapsd_misbehaving_bssid, vif->bss_conf.bssid,
299 		    ETH_ALEN))
300 		return false;
301 
302 	/*
303 	 * Avoid using uAPSD if P2P client is associated to GO that uses
304 	 * opportunistic power save. This is due to current FW limitation.
305 	 */
306 	if (vif->p2p &&
307 	    (vif->bss_conf.p2p_noa_attr.oppps_ctwindow &
308 	    IEEE80211_P2P_OPPPS_ENABLE_BIT))
309 		return false;
310 
311 	/*
312 	 * Avoid using uAPSD if client is in DCM -
313 	 * low latency issue in Miracast
314 	 */
315 	if (iwl_mvm_phy_ctx_count(mvm) >= 2)
316 		return false;
317 
318 	if (vif->p2p) {
319 		/* Allow U-APSD only if p2p is stand alone */
320 		bool is_p2p_standalone = true;
321 
322 		if (!iwl_mvm_is_p2p_scm_uapsd_supported(mvm))
323 			return false;
324 
325 		ieee80211_iterate_active_interfaces_atomic(mvm->hw,
326 					IEEE80211_IFACE_ITER_NORMAL,
327 					iwl_mvm_p2p_standalone_iterator,
328 					&is_p2p_standalone);
329 
330 		if (!is_p2p_standalone)
331 			return false;
332 	}
333 
334 	return true;
335 }
336 
337 static bool iwl_mvm_power_is_radar(struct ieee80211_vif *vif)
338 {
339 	struct ieee80211_chanctx_conf *chanctx_conf;
340 	struct ieee80211_channel *chan;
341 	bool radar_detect = false;
342 
343 	rcu_read_lock();
344 	chanctx_conf = rcu_dereference(vif->chanctx_conf);
345 	WARN_ON(!chanctx_conf);
346 	if (chanctx_conf) {
347 		chan = chanctx_conf->def.chan;
348 		radar_detect = chan->flags & IEEE80211_CHAN_RADAR;
349 	}
350 	rcu_read_unlock();
351 
352 	return radar_detect;
353 }
354 
355 static void iwl_mvm_power_config_skip_dtim(struct iwl_mvm *mvm,
356 					   struct ieee80211_vif *vif,
357 					   struct iwl_mac_power_cmd *cmd,
358 					   bool host_awake)
359 {
360 	int dtimper = vif->bss_conf.dtim_period ?: 1;
361 	int skip;
362 
363 	/* disable, in case we're supposed to override */
364 	cmd->skip_dtim_periods = 0;
365 	cmd->flags &= ~cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
366 
367 	if (iwl_mvm_power_is_radar(vif))
368 		return;
369 
370 	if (dtimper >= 10)
371 		return;
372 
373 	if (host_awake) {
374 		if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_LP)
375 			return;
376 		skip = 2;
377 	} else {
378 		int dtimper_tu = dtimper * vif->bss_conf.beacon_int;
379 
380 		if (WARN_ON(!dtimper_tu))
381 			return;
382 		/* configure skip over dtim up to 306TU - 314 msec */
383 		skip = max_t(u8, 1, 306 / dtimper_tu);
384 	}
385 
386 	/* the firmware really expects "look at every X DTIMs", so add 1 */
387 	cmd->skip_dtim_periods = 1 + skip;
388 	cmd->flags |= cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
389 }
390 
391 static void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm,
392 				    struct ieee80211_vif *vif,
393 				    struct iwl_mac_power_cmd *cmd,
394 				    bool host_awake)
395 {
396 	int dtimper, bi;
397 	int keep_alive;
398 	struct iwl_mvm_vif *mvmvif __maybe_unused =
399 		iwl_mvm_vif_from_mac80211(vif);
400 
401 	cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
402 							    mvmvif->color));
403 	dtimper = vif->bss_conf.dtim_period;
404 	bi = vif->bss_conf.beacon_int;
405 
406 	/*
407 	 * Regardless of power management state the driver must set
408 	 * keep alive period. FW will use it for sending keep alive NDPs
409 	 * immediately after association. Check that keep alive period
410 	 * is at least 3 * DTIM
411 	 */
412 	keep_alive = DIV_ROUND_UP(ieee80211_tu_to_usec(3 * dtimper * bi),
413 				  USEC_PER_SEC);
414 	keep_alive = max(keep_alive, POWER_KEEP_ALIVE_PERIOD_SEC);
415 	cmd->keep_alive_seconds = cpu_to_le16(keep_alive);
416 
417 	if (mvm->ps_disabled)
418 		return;
419 
420 	cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
421 
422 	if (!vif->bss_conf.ps || !mvmvif->pm_enabled)
423 		return;
424 
425 	if (iwl_mvm_vif_low_latency(mvmvif) && vif->p2p &&
426 	    (!fw_has_capa(&mvm->fw->ucode_capa,
427 			 IWL_UCODE_TLV_CAPA_SHORT_PM_TIMEOUTS) ||
428 	     !IWL_MVM_P2P_LOWLATENCY_PS_ENABLE))
429 		return;
430 
431 	cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
432 
433 	if (vif->bss_conf.beacon_rate &&
434 	    (vif->bss_conf.beacon_rate->bitrate == 10 ||
435 	     vif->bss_conf.beacon_rate->bitrate == 60)) {
436 		cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
437 		cmd->lprx_rssi_threshold = POWER_LPRX_RSSI_THRESHOLD;
438 	}
439 
440 	iwl_mvm_power_config_skip_dtim(mvm, vif, cmd, host_awake);
441 
442 	if (!host_awake) {
443 		cmd->rx_data_timeout =
444 			cpu_to_le32(IWL_MVM_WOWLAN_PS_RX_DATA_TIMEOUT);
445 		cmd->tx_data_timeout =
446 			cpu_to_le32(IWL_MVM_WOWLAN_PS_TX_DATA_TIMEOUT);
447 	} else if (iwl_mvm_vif_low_latency(mvmvif) && vif->p2p &&
448 		   fw_has_capa(&mvm->fw->ucode_capa,
449 			       IWL_UCODE_TLV_CAPA_SHORT_PM_TIMEOUTS)) {
450 		cmd->tx_data_timeout =
451 			cpu_to_le32(IWL_MVM_SHORT_PS_TX_DATA_TIMEOUT);
452 		cmd->rx_data_timeout =
453 			cpu_to_le32(IWL_MVM_SHORT_PS_RX_DATA_TIMEOUT);
454 	} else {
455 		cmd->rx_data_timeout =
456 			cpu_to_le32(IWL_MVM_DEFAULT_PS_RX_DATA_TIMEOUT);
457 		cmd->tx_data_timeout =
458 			cpu_to_le32(IWL_MVM_DEFAULT_PS_TX_DATA_TIMEOUT);
459 	}
460 
461 	if (iwl_mvm_power_allow_uapsd(mvm, vif))
462 		iwl_mvm_power_configure_uapsd(mvm, vif, cmd);
463 
464 #ifdef CONFIG_IWLWIFI_DEBUGFS
465 	if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_KEEP_ALIVE)
466 		cmd->keep_alive_seconds =
467 			cpu_to_le16(mvmvif->dbgfs_pm.keep_alive_seconds);
468 	if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_OVER_DTIM) {
469 		if (mvmvif->dbgfs_pm.skip_over_dtim)
470 			cmd->flags |=
471 				cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
472 		else
473 			cmd->flags &=
474 				cpu_to_le16(~POWER_FLAGS_SKIP_OVER_DTIM_MSK);
475 	}
476 	if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_RX_DATA_TIMEOUT)
477 		cmd->rx_data_timeout =
478 			cpu_to_le32(mvmvif->dbgfs_pm.rx_data_timeout);
479 	if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_TX_DATA_TIMEOUT)
480 		cmd->tx_data_timeout =
481 			cpu_to_le32(mvmvif->dbgfs_pm.tx_data_timeout);
482 	if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS)
483 		cmd->skip_dtim_periods = mvmvif->dbgfs_pm.skip_dtim_periods;
484 	if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_ENA) {
485 		if (mvmvif->dbgfs_pm.lprx_ena)
486 			cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
487 		else
488 			cmd->flags &= cpu_to_le16(~POWER_FLAGS_LPRX_ENA_MSK);
489 	}
490 	if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD)
491 		cmd->lprx_rssi_threshold = mvmvif->dbgfs_pm.lprx_rssi_threshold;
492 	if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SNOOZE_ENABLE) {
493 		if (mvmvif->dbgfs_pm.snooze_ena)
494 			cmd->flags |=
495 				cpu_to_le16(POWER_FLAGS_SNOOZE_ENA_MSK);
496 		else
497 			cmd->flags &=
498 				cpu_to_le16(~POWER_FLAGS_SNOOZE_ENA_MSK);
499 	}
500 	if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_UAPSD_MISBEHAVING) {
501 		u16 flag = POWER_FLAGS_UAPSD_MISBEHAVING_ENA_MSK;
502 		if (mvmvif->dbgfs_pm.uapsd_misbehaving)
503 			cmd->flags |= cpu_to_le16(flag);
504 		else
505 			cmd->flags &= cpu_to_le16(flag);
506 	}
507 #endif /* CONFIG_IWLWIFI_DEBUGFS */
508 }
509 
510 static int iwl_mvm_power_send_cmd(struct iwl_mvm *mvm,
511 					 struct ieee80211_vif *vif)
512 {
513 	struct iwl_mac_power_cmd cmd = {};
514 
515 	iwl_mvm_power_build_cmd(mvm, vif, &cmd,
516 				mvm->fwrt.cur_fw_img != IWL_UCODE_WOWLAN);
517 	iwl_mvm_power_log(mvm, &cmd);
518 #ifdef CONFIG_IWLWIFI_DEBUGFS
519 	memcpy(&iwl_mvm_vif_from_mac80211(vif)->mac_pwr_cmd, &cmd, sizeof(cmd));
520 #endif
521 
522 	return iwl_mvm_send_cmd_pdu(mvm, MAC_PM_POWER_TABLE, 0,
523 				    sizeof(cmd), &cmd);
524 }
525 
526 int iwl_mvm_power_update_device(struct iwl_mvm *mvm)
527 {
528 	struct iwl_device_power_cmd cmd = {
529 		.flags = 0,
530 	};
531 
532 	if (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM)
533 		mvm->ps_disabled = true;
534 
535 	if (!mvm->ps_disabled)
536 		cmd.flags |= cpu_to_le16(DEVICE_POWER_FLAGS_POWER_SAVE_ENA_MSK);
537 
538 #ifdef CONFIG_IWLWIFI_DEBUGFS
539 	if ((mvm->fwrt.cur_fw_img == IWL_UCODE_WOWLAN) ?
540 			mvm->disable_power_off_d3 : mvm->disable_power_off)
541 		cmd.flags &=
542 			cpu_to_le16(~DEVICE_POWER_FLAGS_POWER_SAVE_ENA_MSK);
543 #endif
544 	if (mvm->ext_clock_valid)
545 		cmd.flags |= cpu_to_le16(DEVICE_POWER_FLAGS_32K_CLK_VALID_MSK);
546 
547 	IWL_DEBUG_POWER(mvm,
548 			"Sending device power command with flags = 0x%X\n",
549 			cmd.flags);
550 
551 	return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, 0, sizeof(cmd),
552 				    &cmd);
553 }
554 
555 void iwl_mvm_power_vif_assoc(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
556 {
557 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
558 
559 	if (memcmp(vif->bss_conf.bssid, mvmvif->uapsd_misbehaving_bssid,
560 		   ETH_ALEN))
561 		eth_zero_addr(mvmvif->uapsd_misbehaving_bssid);
562 }
563 
564 static void iwl_mvm_power_uapsd_misbehav_ap_iterator(void *_data, u8 *mac,
565 						     struct ieee80211_vif *vif)
566 {
567 	u8 *ap_sta_id = _data;
568 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
569 
570 	/* The ap_sta_id is not expected to change during current association
571 	 * so no explicit protection is needed
572 	 */
573 	if (mvmvif->ap_sta_id == *ap_sta_id)
574 		memcpy(mvmvif->uapsd_misbehaving_bssid, vif->bss_conf.bssid,
575 		       ETH_ALEN);
576 }
577 
578 void iwl_mvm_power_uapsd_misbehaving_ap_notif(struct iwl_mvm *mvm,
579 					      struct iwl_rx_cmd_buffer *rxb)
580 {
581 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
582 	struct iwl_uapsd_misbehaving_ap_notif *notif = (void *)pkt->data;
583 	u8 ap_sta_id = le32_to_cpu(notif->sta_id);
584 
585 	ieee80211_iterate_active_interfaces_atomic(
586 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
587 		iwl_mvm_power_uapsd_misbehav_ap_iterator, &ap_sta_id);
588 }
589 
590 struct iwl_power_vifs {
591 	struct iwl_mvm *mvm;
592 	struct ieee80211_vif *bss_vif;
593 	struct ieee80211_vif *p2p_vif;
594 	struct ieee80211_vif *ap_vif;
595 	struct ieee80211_vif *monitor_vif;
596 	bool p2p_active;
597 	bool bss_active;
598 	bool ap_active;
599 	bool monitor_active;
600 };
601 
602 static void iwl_mvm_power_disable_pm_iterator(void *_data, u8* mac,
603 					      struct ieee80211_vif *vif)
604 {
605 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
606 
607 	mvmvif->pm_enabled = false;
608 }
609 
610 static void iwl_mvm_power_ps_disabled_iterator(void *_data, u8* mac,
611 					       struct ieee80211_vif *vif)
612 {
613 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
614 	bool *disable_ps = _data;
615 
616 	if (mvmvif->phy_ctxt && mvmvif->phy_ctxt->id < NUM_PHY_CTX)
617 		*disable_ps |= mvmvif->ps_disabled;
618 }
619 
620 static void iwl_mvm_power_get_vifs_iterator(void *_data, u8 *mac,
621 					    struct ieee80211_vif *vif)
622 {
623 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
624 	struct iwl_power_vifs *power_iterator = _data;
625 	bool active = mvmvif->phy_ctxt && mvmvif->phy_ctxt->id < NUM_PHY_CTX;
626 
627 	switch (ieee80211_vif_type_p2p(vif)) {
628 	case NL80211_IFTYPE_P2P_DEVICE:
629 		break;
630 
631 	case NL80211_IFTYPE_P2P_GO:
632 	case NL80211_IFTYPE_AP:
633 		/* only a single MAC of the same type */
634 		WARN_ON(power_iterator->ap_vif);
635 		power_iterator->ap_vif = vif;
636 		if (active)
637 			power_iterator->ap_active = true;
638 		break;
639 
640 	case NL80211_IFTYPE_MONITOR:
641 		/* only a single MAC of the same type */
642 		WARN_ON(power_iterator->monitor_vif);
643 		power_iterator->monitor_vif = vif;
644 		if (active)
645 			power_iterator->monitor_active = true;
646 		break;
647 
648 	case NL80211_IFTYPE_P2P_CLIENT:
649 		/* only a single MAC of the same type */
650 		WARN_ON(power_iterator->p2p_vif);
651 		power_iterator->p2p_vif = vif;
652 		if (active)
653 			power_iterator->p2p_active = true;
654 		break;
655 
656 	case NL80211_IFTYPE_STATION:
657 		power_iterator->bss_vif = vif;
658 		if (active)
659 			power_iterator->bss_active = true;
660 		break;
661 
662 	default:
663 		break;
664 	}
665 }
666 
667 static void iwl_mvm_power_set_pm(struct iwl_mvm *mvm,
668 				 struct iwl_power_vifs *vifs)
669 {
670 	struct iwl_mvm_vif *bss_mvmvif = NULL;
671 	struct iwl_mvm_vif *p2p_mvmvif = NULL;
672 	struct iwl_mvm_vif *ap_mvmvif = NULL;
673 	bool client_same_channel = false;
674 	bool ap_same_channel = false;
675 
676 	lockdep_assert_held(&mvm->mutex);
677 
678 	/* set pm_enable to false */
679 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
680 					IEEE80211_IFACE_ITER_NORMAL,
681 					iwl_mvm_power_disable_pm_iterator,
682 					NULL);
683 
684 	if (vifs->bss_vif)
685 		bss_mvmvif = iwl_mvm_vif_from_mac80211(vifs->bss_vif);
686 
687 	if (vifs->p2p_vif)
688 		p2p_mvmvif = iwl_mvm_vif_from_mac80211(vifs->p2p_vif);
689 
690 	if (vifs->ap_vif)
691 		ap_mvmvif = iwl_mvm_vif_from_mac80211(vifs->ap_vif);
692 
693 	/* don't allow PM if any TDLS stations exist */
694 	if (iwl_mvm_tdls_sta_count(mvm, NULL))
695 		return;
696 
697 	/* enable PM on bss if bss stand alone */
698 	if (vifs->bss_active && !vifs->p2p_active && !vifs->ap_active) {
699 		bss_mvmvif->pm_enabled = true;
700 		return;
701 	}
702 
703 	/* enable PM on p2p if p2p stand alone */
704 	if (vifs->p2p_active && !vifs->bss_active && !vifs->ap_active) {
705 		p2p_mvmvif->pm_enabled = true;
706 		return;
707 	}
708 
709 	if (vifs->bss_active && vifs->p2p_active)
710 		client_same_channel = (bss_mvmvif->phy_ctxt->id ==
711 				       p2p_mvmvif->phy_ctxt->id);
712 	if (vifs->bss_active && vifs->ap_active)
713 		ap_same_channel = (bss_mvmvif->phy_ctxt->id ==
714 				   ap_mvmvif->phy_ctxt->id);
715 
716 	/* clients are not stand alone: enable PM if DCM */
717 	if (!(client_same_channel || ap_same_channel)) {
718 		if (vifs->bss_active)
719 			bss_mvmvif->pm_enabled = true;
720 		if (vifs->p2p_active)
721 			p2p_mvmvif->pm_enabled = true;
722 		return;
723 	}
724 
725 	/*
726 	 * There is only one channel in the system and there are only
727 	 * bss and p2p clients that share it
728 	 */
729 	if (client_same_channel && !vifs->ap_active) {
730 		/* share same channel*/
731 		bss_mvmvif->pm_enabled = true;
732 		p2p_mvmvif->pm_enabled = true;
733 	}
734 }
735 
736 #ifdef CONFIG_IWLWIFI_DEBUGFS
737 int iwl_mvm_power_mac_dbgfs_read(struct iwl_mvm *mvm,
738 				 struct ieee80211_vif *vif, char *buf,
739 				 int bufsz)
740 {
741 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
742 	struct iwl_mac_power_cmd cmd = {};
743 	int pos = 0;
744 
745 	mutex_lock(&mvm->mutex);
746 	memcpy(&cmd, &mvmvif->mac_pwr_cmd, sizeof(cmd));
747 	mutex_unlock(&mvm->mutex);
748 
749 	pos += scnprintf(buf+pos, bufsz-pos, "power_scheme = %d\n",
750 			 iwlmvm_mod_params.power_scheme);
751 	pos += scnprintf(buf+pos, bufsz-pos, "flags = 0x%x\n",
752 			 le16_to_cpu(cmd.flags));
753 	pos += scnprintf(buf+pos, bufsz-pos, "keep_alive = %d\n",
754 			 le16_to_cpu(cmd.keep_alive_seconds));
755 
756 	if (!(cmd.flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)))
757 		return pos;
758 
759 	pos += scnprintf(buf+pos, bufsz-pos, "skip_over_dtim = %d\n",
760 			 (cmd.flags &
761 			 cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK)) ? 1 : 0);
762 	pos += scnprintf(buf+pos, bufsz-pos, "skip_dtim_periods = %d\n",
763 			 cmd.skip_dtim_periods);
764 	if (!(cmd.flags & cpu_to_le16(POWER_FLAGS_ADVANCE_PM_ENA_MSK))) {
765 		pos += scnprintf(buf+pos, bufsz-pos, "rx_data_timeout = %d\n",
766 				 le32_to_cpu(cmd.rx_data_timeout));
767 		pos += scnprintf(buf+pos, bufsz-pos, "tx_data_timeout = %d\n",
768 				 le32_to_cpu(cmd.tx_data_timeout));
769 	}
770 	if (cmd.flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
771 		pos += scnprintf(buf+pos, bufsz-pos,
772 				 "lprx_rssi_threshold = %d\n",
773 				 cmd.lprx_rssi_threshold);
774 
775 	if (!(cmd.flags & cpu_to_le16(POWER_FLAGS_ADVANCE_PM_ENA_MSK)))
776 		return pos;
777 
778 	pos += scnprintf(buf+pos, bufsz-pos, "rx_data_timeout_uapsd = %d\n",
779 			 le32_to_cpu(cmd.rx_data_timeout_uapsd));
780 	pos += scnprintf(buf+pos, bufsz-pos, "tx_data_timeout_uapsd = %d\n",
781 			 le32_to_cpu(cmd.tx_data_timeout_uapsd));
782 	pos += scnprintf(buf+pos, bufsz-pos, "qndp_tid = %d\n", cmd.qndp_tid);
783 	pos += scnprintf(buf+pos, bufsz-pos, "uapsd_ac_flags = 0x%x\n",
784 			 cmd.uapsd_ac_flags);
785 	pos += scnprintf(buf+pos, bufsz-pos, "uapsd_max_sp = %d\n",
786 			 cmd.uapsd_max_sp);
787 	pos += scnprintf(buf+pos, bufsz-pos, "heavy_tx_thld_packets = %d\n",
788 			 cmd.heavy_tx_thld_packets);
789 	pos += scnprintf(buf+pos, bufsz-pos, "heavy_rx_thld_packets = %d\n",
790 			 cmd.heavy_rx_thld_packets);
791 	pos += scnprintf(buf+pos, bufsz-pos, "heavy_tx_thld_percentage = %d\n",
792 			 cmd.heavy_tx_thld_percentage);
793 	pos += scnprintf(buf+pos, bufsz-pos, "heavy_rx_thld_percentage = %d\n",
794 			 cmd.heavy_rx_thld_percentage);
795 	pos += scnprintf(buf+pos, bufsz-pos, "uapsd_misbehaving_enable = %d\n",
796 			 (cmd.flags &
797 			  cpu_to_le16(POWER_FLAGS_UAPSD_MISBEHAVING_ENA_MSK)) ?
798 			 1 : 0);
799 
800 	if (!(cmd.flags & cpu_to_le16(POWER_FLAGS_SNOOZE_ENA_MSK)))
801 		return pos;
802 
803 	pos += scnprintf(buf+pos, bufsz-pos, "snooze_interval = %d\n",
804 			 cmd.snooze_interval);
805 	pos += scnprintf(buf+pos, bufsz-pos, "snooze_window = %d\n",
806 			 cmd.snooze_window);
807 
808 	return pos;
809 }
810 
811 void
812 iwl_mvm_beacon_filter_debugfs_parameters(struct ieee80211_vif *vif,
813 					 struct iwl_beacon_filter_cmd *cmd)
814 {
815 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
816 	struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
817 
818 	if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ENERGY_DELTA)
819 		cmd->bf_energy_delta = cpu_to_le32(dbgfs_bf->bf_energy_delta);
820 	if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA)
821 		cmd->bf_roaming_energy_delta =
822 				cpu_to_le32(dbgfs_bf->bf_roaming_energy_delta);
823 	if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ROAMING_STATE)
824 		cmd->bf_roaming_state = cpu_to_le32(dbgfs_bf->bf_roaming_state);
825 	if (dbgfs_bf->mask & MVM_DEBUGFS_BF_TEMP_THRESHOLD)
826 		cmd->bf_temp_threshold =
827 				cpu_to_le32(dbgfs_bf->bf_temp_threshold);
828 	if (dbgfs_bf->mask & MVM_DEBUGFS_BF_TEMP_FAST_FILTER)
829 		cmd->bf_temp_fast_filter =
830 				cpu_to_le32(dbgfs_bf->bf_temp_fast_filter);
831 	if (dbgfs_bf->mask & MVM_DEBUGFS_BF_TEMP_SLOW_FILTER)
832 		cmd->bf_temp_slow_filter =
833 				cpu_to_le32(dbgfs_bf->bf_temp_slow_filter);
834 	if (dbgfs_bf->mask & MVM_DEBUGFS_BF_DEBUG_FLAG)
835 		cmd->bf_debug_flag = cpu_to_le32(dbgfs_bf->bf_debug_flag);
836 	if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ESCAPE_TIMER)
837 		cmd->bf_escape_timer = cpu_to_le32(dbgfs_bf->bf_escape_timer);
838 	if (dbgfs_bf->mask & MVM_DEBUGFS_BA_ESCAPE_TIMER)
839 		cmd->ba_escape_timer = cpu_to_le32(dbgfs_bf->ba_escape_timer);
840 	if (dbgfs_bf->mask & MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT)
841 		cmd->ba_enable_beacon_abort =
842 				cpu_to_le32(dbgfs_bf->ba_enable_beacon_abort);
843 }
844 #endif
845 
846 static int _iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
847 					 struct ieee80211_vif *vif,
848 					 struct iwl_beacon_filter_cmd *cmd,
849 					 u32 cmd_flags)
850 {
851 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
852 	int ret;
853 
854 	if (mvmvif != mvm->bf_allowed_vif || !vif->bss_conf.dtim_period ||
855 	    vif->type != NL80211_IFTYPE_STATION || vif->p2p)
856 		return 0;
857 
858 	iwl_mvm_beacon_filter_set_cqm_params(mvm, vif, cmd);
859 	iwl_mvm_beacon_filter_debugfs_parameters(vif, cmd);
860 	ret = iwl_mvm_beacon_filter_send_cmd(mvm, cmd, cmd_flags);
861 
862 	if (!ret)
863 		mvmvif->bf_data.bf_enabled = true;
864 
865 	return ret;
866 }
867 
868 int iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
869 				 struct ieee80211_vif *vif,
870 				 u32 flags)
871 {
872 	struct iwl_beacon_filter_cmd cmd = {
873 		IWL_BF_CMD_CONFIG_DEFAULTS,
874 		.bf_enable_beacon_filter = cpu_to_le32(1),
875 	};
876 
877 	return _iwl_mvm_enable_beacon_filter(mvm, vif, &cmd, flags);
878 }
879 
880 static int _iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
881 					  struct ieee80211_vif *vif,
882 					  u32 flags)
883 {
884 	struct iwl_beacon_filter_cmd cmd = {};
885 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
886 	int ret;
887 
888 	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
889 		return 0;
890 
891 	ret = iwl_mvm_beacon_filter_send_cmd(mvm, &cmd, flags);
892 
893 	if (!ret)
894 		mvmvif->bf_data.bf_enabled = false;
895 
896 	return ret;
897 }
898 
899 int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
900 				  struct ieee80211_vif *vif,
901 				  u32 flags)
902 {
903 	return _iwl_mvm_disable_beacon_filter(mvm, vif, flags);
904 }
905 
906 static int iwl_mvm_power_set_ps(struct iwl_mvm *mvm)
907 {
908 	bool disable_ps;
909 	int ret;
910 
911 	/* disable PS if CAM */
912 	disable_ps = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM);
913 	/* ...or if any of the vifs require PS to be off */
914 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
915 					IEEE80211_IFACE_ITER_NORMAL,
916 					iwl_mvm_power_ps_disabled_iterator,
917 					&disable_ps);
918 
919 	/* update device power state if it has changed */
920 	if (mvm->ps_disabled != disable_ps) {
921 		bool old_ps_disabled = mvm->ps_disabled;
922 
923 		mvm->ps_disabled = disable_ps;
924 		ret = iwl_mvm_power_update_device(mvm);
925 		if (ret) {
926 			mvm->ps_disabled = old_ps_disabled;
927 			return ret;
928 		}
929 	}
930 
931 	return 0;
932 }
933 
934 static int iwl_mvm_power_set_ba(struct iwl_mvm *mvm,
935 				struct ieee80211_vif *vif)
936 {
937 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
938 	struct iwl_beacon_filter_cmd cmd = {
939 		IWL_BF_CMD_CONFIG_DEFAULTS,
940 		.bf_enable_beacon_filter = cpu_to_le32(1),
941 	};
942 
943 	if (!mvmvif->bf_data.bf_enabled)
944 		return 0;
945 
946 	if (mvm->fwrt.cur_fw_img == IWL_UCODE_WOWLAN)
947 		cmd.ba_escape_timer = cpu_to_le32(IWL_BA_ESCAPE_TIMER_D3);
948 
949 	mvmvif->bf_data.ba_enabled = !(!mvmvif->pm_enabled ||
950 				       mvm->ps_disabled ||
951 				       !vif->bss_conf.ps ||
952 				       iwl_mvm_vif_low_latency(mvmvif));
953 
954 	return _iwl_mvm_enable_beacon_filter(mvm, vif, &cmd, 0);
955 }
956 
957 int iwl_mvm_power_update_ps(struct iwl_mvm *mvm)
958 {
959 	struct iwl_power_vifs vifs = {
960 		.mvm = mvm,
961 	};
962 	int ret;
963 
964 	lockdep_assert_held(&mvm->mutex);
965 
966 	/* get vifs info */
967 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
968 					IEEE80211_IFACE_ITER_NORMAL,
969 					iwl_mvm_power_get_vifs_iterator, &vifs);
970 
971 	ret = iwl_mvm_power_set_ps(mvm);
972 	if (ret)
973 		return ret;
974 
975 	if (vifs.bss_vif)
976 		return iwl_mvm_power_set_ba(mvm, vifs.bss_vif);
977 
978 	return 0;
979 }
980 
981 int iwl_mvm_power_update_mac(struct iwl_mvm *mvm)
982 {
983 	struct iwl_power_vifs vifs = {
984 		.mvm = mvm,
985 	};
986 	int ret;
987 
988 	lockdep_assert_held(&mvm->mutex);
989 
990 	/* get vifs info */
991 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
992 					IEEE80211_IFACE_ITER_NORMAL,
993 					iwl_mvm_power_get_vifs_iterator, &vifs);
994 
995 	iwl_mvm_power_set_pm(mvm, &vifs);
996 
997 	ret = iwl_mvm_power_set_ps(mvm);
998 	if (ret)
999 		return ret;
1000 
1001 	if (vifs.bss_vif) {
1002 		ret = iwl_mvm_power_send_cmd(mvm, vifs.bss_vif);
1003 		if (ret)
1004 			return ret;
1005 	}
1006 
1007 	if (vifs.p2p_vif) {
1008 		ret = iwl_mvm_power_send_cmd(mvm, vifs.p2p_vif);
1009 		if (ret)
1010 			return ret;
1011 	}
1012 
1013 	if (vifs.bss_vif)
1014 		return iwl_mvm_power_set_ba(mvm, vifs.bss_vif);
1015 
1016 	return 0;
1017 }
1018