xref: /linux/drivers/net/wireless/realtek/rtlwifi/ps.c (revision 0ea5c948cb64bab5bc7a5516774eb8536f05aa0d)
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2009-2012  Realtek Corporation.*/
3 
4 #include "wifi.h"
5 #include "base.h"
6 #include "ps.h"
7 #include <linux/export.h>
8 #include "btcoexist/rtl_btc.h"
9 
rtl_ps_enable_nic(struct ieee80211_hw * hw)10 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
11 {
12 	struct rtl_priv *rtlpriv = rtl_priv(hw);
13 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
14 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
15 	struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
16 
17 	/*<1> reset trx ring */
18 	if (rtlhal->interface == INTF_PCI)
19 		rtlpriv->intf_ops->reset_trx_ring(hw);
20 
21 	if (is_hal_stop(rtlhal))
22 		rtl_dbg(rtlpriv, COMP_ERR, DBG_WARNING,
23 			"Driver is already down!\n");
24 
25 	/*<2> Enable Adapter */
26 	if (rtlpriv->cfg->ops->hw_init(hw))
27 		return false;
28 	rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RETRY_LIMIT,
29 			&rtlmac->retry_long);
30 	RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
31 
32 	rtlpriv->cfg->ops->switch_channel(hw);
33 	rtlpriv->cfg->ops->set_channel_access(hw);
34 	rtlpriv->cfg->ops->set_bw_mode(hw,
35 			cfg80211_get_chandef_type(&hw->conf.chandef));
36 
37 	/*<3> Enable Interrupt */
38 	rtlpriv->cfg->ops->enable_interrupt(hw);
39 
40 	/*<enable timer> */
41 	rtl_watch_dog_timer_callback(&rtlpriv->works.watchdog_timer);
42 
43 	return true;
44 }
45 EXPORT_SYMBOL(rtl_ps_enable_nic);
46 
rtl_ps_disable_nic(struct ieee80211_hw * hw)47 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
48 {
49 	struct rtl_priv *rtlpriv = rtl_priv(hw);
50 
51 	/*<1> Stop all timer */
52 	rtl_deinit_deferred_work(hw, true);
53 
54 	/*<2> Disable Interrupt */
55 	rtlpriv->cfg->ops->disable_interrupt(hw);
56 	tasklet_kill(&rtlpriv->works.irq_tasklet);
57 
58 	/*<3> Disable Adapter */
59 	rtlpriv->cfg->ops->hw_disable(hw);
60 
61 	return true;
62 }
63 EXPORT_SYMBOL(rtl_ps_disable_nic);
64 
rtl_ps_set_rf_state(struct ieee80211_hw * hw,enum rf_pwrstate state_toset,u32 changesource)65 static bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
66 				enum rf_pwrstate state_toset,
67 				u32 changesource)
68 {
69 	struct rtl_priv *rtlpriv = rtl_priv(hw);
70 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
71 	bool actionallowed = false;
72 	u16 rfwait_cnt = 0;
73 
74 	/*Only one thread can change
75 	 *the RF state at one time, and others
76 	 *should wait to be executed.
77 	 */
78 	while (true) {
79 		spin_lock(&rtlpriv->locks.rf_ps_lock);
80 		if (ppsc->rfchange_inprogress) {
81 			spin_unlock(&rtlpriv->locks.rf_ps_lock);
82 
83 			rtl_dbg(rtlpriv, COMP_ERR, DBG_WARNING,
84 				"RF Change in progress! Wait to set..state_toset(%d).\n",
85 				state_toset);
86 
87 			/* Set RF after the previous action is done.  */
88 			while (ppsc->rfchange_inprogress) {
89 				rfwait_cnt++;
90 				mdelay(1);
91 				/*Wait too long, return false to avoid
92 				 *to be stuck here.
93 				 */
94 				if (rfwait_cnt > 100)
95 					return false;
96 			}
97 		} else {
98 			ppsc->rfchange_inprogress = true;
99 			spin_unlock(&rtlpriv->locks.rf_ps_lock);
100 			break;
101 		}
102 	}
103 
104 	switch (state_toset) {
105 	case ERFON:
106 		ppsc->rfoff_reason &= (~changesource);
107 
108 		if ((changesource == RF_CHANGE_BY_HW) &&
109 		    (ppsc->hwradiooff)) {
110 			ppsc->hwradiooff = false;
111 		}
112 
113 		if (!ppsc->rfoff_reason) {
114 			ppsc->rfoff_reason = 0;
115 			actionallowed = true;
116 		}
117 
118 		break;
119 
120 	case ERFOFF:
121 
122 		if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
123 			ppsc->hwradiooff = true;
124 		}
125 
126 		ppsc->rfoff_reason |= changesource;
127 		actionallowed = true;
128 		break;
129 
130 	case ERFSLEEP:
131 		ppsc->rfoff_reason |= changesource;
132 		actionallowed = true;
133 		break;
134 
135 	default:
136 		pr_err("switch case %#x not processed\n", state_toset);
137 		break;
138 	}
139 
140 	if (actionallowed)
141 		rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
142 
143 	spin_lock(&rtlpriv->locks.rf_ps_lock);
144 	ppsc->rfchange_inprogress = false;
145 	spin_unlock(&rtlpriv->locks.rf_ps_lock);
146 
147 	return actionallowed;
148 }
149 
_rtl_ps_inactive_ps(struct ieee80211_hw * hw)150 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
151 {
152 	struct rtl_priv *rtlpriv = rtl_priv(hw);
153 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
154 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
155 
156 	ppsc->swrf_processing = true;
157 
158 	if (ppsc->inactive_pwrstate == ERFON &&
159 	    rtlhal->interface == INTF_PCI) {
160 		if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
161 		    RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
162 			rtlpriv->intf_ops->disable_aspm(hw);
163 			RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
164 		}
165 	}
166 
167 	rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
168 			    RF_CHANGE_BY_IPS);
169 
170 	if (ppsc->inactive_pwrstate == ERFOFF &&
171 	    rtlhal->interface == INTF_PCI) {
172 		if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
173 		    !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
174 			rtlpriv->intf_ops->enable_aspm(hw);
175 			RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
176 		}
177 	}
178 
179 	ppsc->swrf_processing = false;
180 }
181 
rtl_ips_nic_off_wq_callback(struct work_struct * work)182 void rtl_ips_nic_off_wq_callback(struct work_struct *work)
183 {
184 	struct rtl_works *rtlworks = container_of(work, struct rtl_works,
185 						  ips_nic_off_wq.work);
186 	struct ieee80211_hw *hw = rtlworks->hw;
187 	struct rtl_priv *rtlpriv = rtl_priv(hw);
188 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
189 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
190 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
191 	enum rf_pwrstate rtstate;
192 
193 	if (mac->opmode != NL80211_IFTYPE_STATION) {
194 		rtl_dbg(rtlpriv, COMP_ERR, DBG_WARNING,
195 			"not station return\n");
196 		return;
197 	}
198 
199 	if (mac->p2p_in_use)
200 		return;
201 
202 	if (mac->link_state > MAC80211_NOLINK)
203 		return;
204 
205 	if (is_hal_stop(rtlhal))
206 		return;
207 
208 	if (rtlpriv->sec.being_setkey)
209 		return;
210 
211 	if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
212 		rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
213 
214 	if (ppsc->inactiveps) {
215 		rtstate = ppsc->rfpwr_state;
216 
217 		/*
218 		 *Do not enter IPS in the following conditions:
219 		 *(1) RF is already OFF or Sleep
220 		 *(2) swrf_processing (indicates the IPS is still under going)
221 		 *(3) Connectted (only disconnected can trigger IPS)
222 		 *(4) IBSS (send Beacon)
223 		 *(5) AP mode (send Beacon)
224 		 *(6) monitor mode (rcv packet)
225 		 */
226 
227 		if (rtstate == ERFON &&
228 		    !ppsc->swrf_processing &&
229 		    (mac->link_state == MAC80211_NOLINK) &&
230 		    !mac->act_scanning) {
231 			rtl_dbg(rtlpriv, COMP_RF, DBG_TRACE,
232 				"IPSEnter(): Turn off RF\n");
233 
234 			ppsc->inactive_pwrstate = ERFOFF;
235 			ppsc->in_powersavemode = true;
236 
237 			/* call before RF off */
238 			if (rtlpriv->cfg->ops->get_btc_status())
239 				rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
240 									ppsc->inactive_pwrstate);
241 
242 			/*rtl_pci_reset_trx_ring(hw); */
243 			_rtl_ps_inactive_ps(hw);
244 		}
245 	}
246 }
247 
rtl_ips_nic_off(struct ieee80211_hw * hw)248 void rtl_ips_nic_off(struct ieee80211_hw *hw)
249 {
250 	struct rtl_priv *rtlpriv = rtl_priv(hw);
251 
252 	/* because when link with ap, mac80211 will ask us
253 	 * to disable nic quickly after scan before linking,
254 	 * this will cause link failed, so we delay 100ms here
255 	 */
256 	queue_delayed_work(rtlpriv->works.rtl_wq,
257 			   &rtlpriv->works.ips_nic_off_wq, MSECS(100));
258 }
259 
260 /* NOTICE: any opmode should exc nic_on, or disable without
261  * nic_on may something wrong, like adhoc TP
262  */
rtl_ips_nic_on(struct ieee80211_hw * hw)263 void rtl_ips_nic_on(struct ieee80211_hw *hw)
264 {
265 	struct rtl_priv *rtlpriv = rtl_priv(hw);
266 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
267 	enum rf_pwrstate rtstate;
268 
269 	cancel_delayed_work_sync(&rtlpriv->works.ips_nic_off_wq);
270 
271 	mutex_lock(&rtlpriv->locks.ips_mutex);
272 	if (ppsc->inactiveps) {
273 		rtstate = ppsc->rfpwr_state;
274 
275 		if (rtstate != ERFON &&
276 		    !ppsc->swrf_processing &&
277 		    ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
278 
279 			ppsc->inactive_pwrstate = ERFON;
280 			ppsc->in_powersavemode = false;
281 			_rtl_ps_inactive_ps(hw);
282 			/* call after RF on */
283 			if (rtlpriv->cfg->ops->get_btc_status())
284 				rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
285 									ppsc->inactive_pwrstate);
286 		}
287 	}
288 	mutex_unlock(&rtlpriv->locks.ips_mutex);
289 }
290 EXPORT_SYMBOL_GPL(rtl_ips_nic_on);
291 
292 /*for FW LPS*/
293 
294 /*
295  *Determine if we can set Fw into PS mode
296  *in current condition.Return TRUE if it
297  *can enter PS mode.
298  */
rtl_get_fwlps_doze(struct ieee80211_hw * hw)299 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
300 {
301 	struct rtl_priv *rtlpriv = rtl_priv(hw);
302 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
303 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
304 	u32 ps_timediff;
305 
306 	ps_timediff = jiffies_to_msecs(jiffies -
307 				       ppsc->last_delaylps_stamp_jiffies);
308 
309 	if (ps_timediff < 2000) {
310 		rtl_dbg(rtlpriv, COMP_POWER, DBG_LOUD,
311 			"Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
312 		return false;
313 	}
314 
315 	if (mac->link_state != MAC80211_LINKED)
316 		return false;
317 
318 	if (mac->opmode == NL80211_IFTYPE_ADHOC)
319 		return false;
320 
321 	return true;
322 }
323 
324 /* Change current and default preamble mode.*/
rtl_lps_set_psmode(struct ieee80211_hw * hw,u8 rt_psmode)325 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
326 {
327 	struct rtl_priv *rtlpriv = rtl_priv(hw);
328 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
329 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
330 	bool enter_fwlps;
331 
332 	if (mac->opmode == NL80211_IFTYPE_ADHOC)
333 		return;
334 
335 	if (mac->link_state != MAC80211_LINKED)
336 		return;
337 
338 	if (ppsc->dot11_psmode == rt_psmode && rt_psmode == EACTIVE)
339 		return;
340 
341 	/* Update power save mode configured. */
342 	ppsc->dot11_psmode = rt_psmode;
343 
344 	/*
345 	 *<FW control LPS>
346 	 *1. Enter PS mode
347 	 *   Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
348 	 *   cmd to set Fw into PS mode.
349 	 *2. Leave PS mode
350 	 *   Send H2C fw_pwrmode cmd to Fw to set Fw into Active
351 	 *   mode and set RPWM to turn RF on.
352 	 */
353 
354 	if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
355 		if (ppsc->dot11_psmode == EACTIVE) {
356 			rtl_dbg(rtlpriv, COMP_RF, DBG_DMESG,
357 				"FW LPS leave ps_mode:%x\n",
358 				FW_PS_ACTIVE_MODE);
359 			enter_fwlps = false;
360 			ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
361 			ppsc->smart_ps = 0;
362 			rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
363 						      (u8 *)(&enter_fwlps));
364 			if (ppsc->p2p_ps_info.opp_ps)
365 				rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE);
366 
367 			if (rtlpriv->cfg->ops->get_btc_status())
368 				rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
369 		} else {
370 			if (rtl_get_fwlps_doze(hw)) {
371 				rtl_dbg(rtlpriv, COMP_RF, DBG_DMESG,
372 					"FW LPS enter ps_mode:%x\n",
373 					ppsc->fwctrl_psmode);
374 				if (rtlpriv->cfg->ops->get_btc_status())
375 					rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
376 				enter_fwlps = true;
377 				ppsc->pwr_mode = ppsc->fwctrl_psmode;
378 				ppsc->smart_ps = 2;
379 				rtlpriv->cfg->ops->set_hw_reg(hw,
380 							HW_VAR_FW_LPS_ACTION,
381 							(u8 *)(&enter_fwlps));
382 
383 			} else {
384 				/* Reset the power save related parameters. */
385 				ppsc->dot11_psmode = EACTIVE;
386 			}
387 		}
388 	}
389 }
390 
391 /* Interrupt safe routine to enter the leisure power save mode.*/
rtl_lps_enter_core(struct ieee80211_hw * hw)392 static void rtl_lps_enter_core(struct ieee80211_hw *hw)
393 {
394 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
395 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
396 	struct rtl_priv *rtlpriv = rtl_priv(hw);
397 
398 	if (!ppsc->fwctrl_lps)
399 		return;
400 
401 	if (rtlpriv->sec.being_setkey)
402 		return;
403 
404 	if (rtlpriv->link_info.busytraffic)
405 		return;
406 
407 	/*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
408 	if (mac->cnt_after_linked < 5)
409 		return;
410 
411 	if (mac->opmode == NL80211_IFTYPE_ADHOC)
412 		return;
413 
414 	if (mac->link_state != MAC80211_LINKED)
415 		return;
416 
417 	mutex_lock(&rtlpriv->locks.lps_mutex);
418 
419 	/* Don't need to check (ppsc->dot11_psmode == EACTIVE), because
420 	 * bt_ccoexist may ask to enter lps.
421 	 * In normal case, this constraint move to rtl_lps_set_psmode().
422 	 */
423 	rtl_dbg(rtlpriv, COMP_POWER, DBG_LOUD,
424 		"Enter 802.11 power save mode...\n");
425 	rtl_lps_set_psmode(hw, EAUTOPS);
426 
427 	mutex_unlock(&rtlpriv->locks.lps_mutex);
428 }
429 
430 /* Interrupt safe routine to leave the leisure power save mode.*/
rtl_lps_leave_core(struct ieee80211_hw * hw)431 static void rtl_lps_leave_core(struct ieee80211_hw *hw)
432 {
433 	struct rtl_priv *rtlpriv = rtl_priv(hw);
434 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
435 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
436 
437 	mutex_lock(&rtlpriv->locks.lps_mutex);
438 
439 	if (ppsc->fwctrl_lps) {
440 		if (ppsc->dot11_psmode != EACTIVE) {
441 
442 			/*FIX ME */
443 			/*rtlpriv->cfg->ops->enable_interrupt(hw); */
444 
445 			if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
446 			    RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
447 			    rtlhal->interface == INTF_PCI) {
448 				rtlpriv->intf_ops->disable_aspm(hw);
449 				RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
450 			}
451 
452 			rtl_dbg(rtlpriv, COMP_POWER, DBG_LOUD,
453 				"Busy Traffic,Leave 802.11 power save..\n");
454 
455 			rtl_lps_set_psmode(hw, EACTIVE);
456 		}
457 	}
458 	mutex_unlock(&rtlpriv->locks.lps_mutex);
459 }
460 
461 /* For sw LPS*/
rtl_swlps_beacon(struct ieee80211_hw * hw,void * data,unsigned int len)462 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
463 {
464 	struct rtl_priv *rtlpriv = rtl_priv(hw);
465 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
466 	struct ieee80211_hdr *hdr = data;
467 	struct ieee80211_tim_ie *tim_ie;
468 	u8 *tim;
469 	u8 tim_len;
470 	bool u_buffed;
471 	bool m_buffed;
472 
473 	if (mac->opmode != NL80211_IFTYPE_STATION)
474 		return;
475 
476 	if (!rtlpriv->psc.swctrl_lps)
477 		return;
478 
479 	if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
480 		return;
481 
482 	if (!rtlpriv->psc.sw_ps_enabled)
483 		return;
484 
485 	if (rtlpriv->psc.fwctrl_lps)
486 		return;
487 
488 	if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
489 		return;
490 
491 	/* check if this really is a beacon */
492 	if (!ieee80211_is_beacon(hdr->frame_control))
493 		return;
494 
495 	/* min. beacon length + FCS_LEN */
496 	if (len <= 40 + FCS_LEN)
497 		return;
498 
499 	/* and only beacons from the associated BSSID, please */
500 	if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
501 		return;
502 
503 	rtlpriv->psc.last_beacon = jiffies;
504 
505 	tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
506 	if (!tim)
507 		return;
508 
509 	if (tim[1] < sizeof(*tim_ie))
510 		return;
511 
512 	tim_len = tim[1];
513 	tim_ie = (struct ieee80211_tim_ie *) &tim[2];
514 
515 	if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
516 		rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
517 
518 	/* Check whenever the PHY can be turned off again. */
519 
520 	/* 1. What about buffered unicast traffic for our AID? */
521 	u_buffed = ieee80211_check_tim(tim_ie, tim_len,
522 				       rtlpriv->mac80211.assoc_id);
523 
524 	/* 2. Maybe the AP wants to send multicast/broadcast data? */
525 	m_buffed = tim_ie->bitmap_ctrl & 0x01;
526 	rtlpriv->psc.multi_buffered = m_buffed;
527 
528 	/* unicast will process by mac80211 through
529 	 * set ~IEEE80211_CONF_PS, So we just check
530 	 * multicast frames here */
531 	if (!m_buffed) {
532 		/* back to low-power land. and delay is
533 		 * prevent null power save frame tx fail */
534 		queue_delayed_work(rtlpriv->works.rtl_wq,
535 				   &rtlpriv->works.ps_work, MSECS(5));
536 	} else {
537 		rtl_dbg(rtlpriv, COMP_POWER, DBG_DMESG,
538 			"u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
539 	}
540 }
541 EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
542 
rtl_swlps_rf_awake(struct ieee80211_hw * hw)543 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
544 {
545 	struct rtl_priv *rtlpriv = rtl_priv(hw);
546 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
547 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
548 
549 	if (!rtlpriv->psc.swctrl_lps)
550 		return;
551 	if (mac->link_state != MAC80211_LINKED)
552 		return;
553 
554 	if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
555 	    RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
556 		rtlpriv->intf_ops->disable_aspm(hw);
557 		RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
558 	}
559 
560 	mutex_lock(&rtlpriv->locks.lps_mutex);
561 	rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
562 	mutex_unlock(&rtlpriv->locks.lps_mutex);
563 }
564 
rtl_swlps_rfon_wq_callback(struct work_struct * work)565 void rtl_swlps_rfon_wq_callback(struct work_struct *work)
566 {
567 	struct rtl_works *rtlworks = container_of(work, struct rtl_works,
568 						  ps_rfon_wq.work);
569 	struct ieee80211_hw *hw = rtlworks->hw;
570 
571 	rtl_swlps_rf_awake(hw);
572 }
573 
rtl_swlps_rf_sleep(struct ieee80211_hw * hw)574 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
575 {
576 	struct rtl_priv *rtlpriv = rtl_priv(hw);
577 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
578 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
579 	u8 sleep_intv;
580 
581 	if (!rtlpriv->psc.sw_ps_enabled)
582 		return;
583 
584 	if ((rtlpriv->sec.being_setkey) ||
585 	    (mac->opmode == NL80211_IFTYPE_ADHOC))
586 		return;
587 
588 	/*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
589 	if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
590 		return;
591 
592 	if (rtlpriv->link_info.busytraffic)
593 		return;
594 
595 	spin_lock(&rtlpriv->locks.rf_ps_lock);
596 	if (rtlpriv->psc.rfchange_inprogress) {
597 		spin_unlock(&rtlpriv->locks.rf_ps_lock);
598 		return;
599 	}
600 	spin_unlock(&rtlpriv->locks.rf_ps_lock);
601 
602 	mutex_lock(&rtlpriv->locks.lps_mutex);
603 	rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
604 	mutex_unlock(&rtlpriv->locks.lps_mutex);
605 
606 	if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
607 	    !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
608 		rtlpriv->intf_ops->enable_aspm(hw);
609 		RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
610 	}
611 
612 	/* here is power save alg, when this beacon is DTIM
613 	 * we will set sleep time to dtim_period * n;
614 	 * when this beacon is not DTIM, we will set sleep
615 	 * time to sleep_intv = rtlpriv->psc.dtim_counter or
616 	 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
617 
618 	if (rtlpriv->psc.dtim_counter == 0) {
619 		if (hw->conf.ps_dtim_period == 1)
620 			sleep_intv = hw->conf.ps_dtim_period * 2;
621 		else
622 			sleep_intv = hw->conf.ps_dtim_period;
623 	} else {
624 		sleep_intv = rtlpriv->psc.dtim_counter;
625 	}
626 
627 	if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
628 		sleep_intv = MAX_SW_LPS_SLEEP_INTV;
629 
630 	/* this print should always be dtim_conter = 0 &
631 	 * sleep  = dtim_period, that meaons, we should
632 	 * awake before every dtim */
633 	rtl_dbg(rtlpriv, COMP_POWER, DBG_DMESG,
634 		"dtim_counter:%x will sleep :%d beacon_intv\n",
635 		rtlpriv->psc.dtim_counter, sleep_intv);
636 
637 	/* we tested that 40ms is enough for sw & hw sw delay */
638 	queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
639 			MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
640 }
641 
rtl_lps_change_work_callback(struct work_struct * work)642 void rtl_lps_change_work_callback(struct work_struct *work)
643 {
644 	struct rtl_works *rtlworks =
645 	    container_of(work, struct rtl_works, lps_change_work);
646 	struct ieee80211_hw *hw = rtlworks->hw;
647 	struct rtl_priv *rtlpriv = rtl_priv(hw);
648 
649 	if (rtlpriv->enter_ps)
650 		rtl_lps_enter_core(hw);
651 	else
652 		rtl_lps_leave_core(hw);
653 }
654 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
655 
rtl_lps_enter(struct ieee80211_hw * hw,bool may_block)656 void rtl_lps_enter(struct ieee80211_hw *hw, bool may_block)
657 {
658 	struct rtl_priv *rtlpriv = rtl_priv(hw);
659 
660 	if (may_block)
661 		return rtl_lps_enter_core(hw);
662 	rtlpriv->enter_ps = true;
663 	schedule_work(&rtlpriv->works.lps_change_work);
664 }
665 EXPORT_SYMBOL_GPL(rtl_lps_enter);
666 
rtl_lps_leave(struct ieee80211_hw * hw,bool may_block)667 void rtl_lps_leave(struct ieee80211_hw *hw, bool may_block)
668 {
669 	struct rtl_priv *rtlpriv = rtl_priv(hw);
670 
671 	if (may_block)
672 		return rtl_lps_leave_core(hw);
673 	rtlpriv->enter_ps = false;
674 	schedule_work(&rtlpriv->works.lps_change_work);
675 }
676 EXPORT_SYMBOL_GPL(rtl_lps_leave);
677 
rtl_swlps_wq_callback(struct work_struct * work)678 void rtl_swlps_wq_callback(struct work_struct *work)
679 {
680 	struct rtl_works *rtlworks = container_of(work, struct rtl_works,
681 						  ps_work.work);
682 	struct ieee80211_hw *hw = rtlworks->hw;
683 	struct rtl_priv *rtlpriv = rtl_priv(hw);
684 
685 	/* we can sleep after ps null send ok */
686 	if (rtlpriv->psc.state_inap)
687 		rtl_swlps_rf_sleep(hw);
688 }
689 
rtl_p2p_noa_ie(struct ieee80211_hw * hw,void * data,unsigned int len)690 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
691 			   unsigned int len)
692 {
693 	struct rtl_priv *rtlpriv = rtl_priv(hw);
694 	struct ieee80211_mgmt *mgmt = data;
695 	struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
696 	u8 *pos, *end, *ie;
697 	u16 noa_len;
698 	static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
699 	u8 noa_num, index , i, noa_index = 0;
700 	bool find_p2p_ie = false , find_p2p_ps_ie = false;
701 
702 	pos = (u8 *)mgmt->u.beacon.variable;
703 	end = data + len;
704 	ie = NULL;
705 
706 	while (pos + 1 < end) {
707 		if (pos + 2 + pos[1] > end)
708 			return;
709 
710 		if (pos[0] == 221 && pos[1] > 4) {
711 			if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
712 				ie = pos + 2+4;
713 				break;
714 			}
715 		}
716 		pos += 2 + pos[1];
717 	}
718 
719 	if (ie == NULL)
720 		return;
721 	find_p2p_ie = true;
722 	/*to find noa ie*/
723 	while (ie + 1 < end) {
724 		noa_len = le16_to_cpu(*((__le16 *)&ie[1]));
725 		if (ie + 3 + ie[1] > end)
726 			return;
727 
728 		if (ie[0] == 12) {
729 			find_p2p_ps_ie = true;
730 			if ((noa_len - 2) % 13 != 0) {
731 				rtl_dbg(rtlpriv, COMP_INIT, DBG_LOUD,
732 					"P2P notice of absence: invalid length.%d\n",
733 					noa_len);
734 				return;
735 			} else {
736 				noa_num = (noa_len - 2) / 13;
737 				if (noa_num > P2P_MAX_NOA_NUM)
738 					noa_num = P2P_MAX_NOA_NUM;
739 
740 			}
741 			noa_index = ie[3];
742 			if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
743 			    P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
744 				rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD,
745 					"update NOA ie.\n");
746 				p2pinfo->noa_index = noa_index;
747 				p2pinfo->opp_ps = (ie[4] >> 7);
748 				p2pinfo->ctwindow = ie[4] & 0x7F;
749 				p2pinfo->noa_num = noa_num;
750 				index = 5;
751 				for (i = 0; i < noa_num; i++) {
752 					p2pinfo->noa_count_type[i] =
753 					 *(u8 *)(ie + index);
754 					index += 1;
755 					p2pinfo->noa_duration[i] =
756 					 le32_to_cpu(*(__le32 *)(ie + index));
757 					index += 4;
758 					p2pinfo->noa_interval[i] =
759 					 le32_to_cpu(*(__le32 *)(ie + index));
760 					index += 4;
761 					p2pinfo->noa_start_time[i] =
762 					 le32_to_cpu(*(__le32 *)(ie + index));
763 					index += 4;
764 				}
765 
766 				if (p2pinfo->opp_ps == 1) {
767 					p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
768 					/* Driver should wait LPS entering
769 					 * CTWindow
770 					 */
771 					if (rtlpriv->psc.fw_current_inpsmode)
772 						rtl_p2p_ps_cmd(hw,
773 							       P2P_PS_ENABLE);
774 				} else if (p2pinfo->noa_num > 0) {
775 					p2pinfo->p2p_ps_mode = P2P_PS_NOA;
776 					rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
777 				} else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
778 					rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
779 				}
780 			}
781 			break;
782 		}
783 		ie += 3 + noa_len;
784 	}
785 
786 	if (find_p2p_ie) {
787 		if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
788 		    (!find_p2p_ps_ie))
789 			rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
790 	}
791 }
792 
rtl_p2p_action_ie(struct ieee80211_hw * hw,void * data,unsigned int len)793 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
794 			      unsigned int len)
795 {
796 	struct rtl_priv *rtlpriv = rtl_priv(hw);
797 	struct ieee80211_mgmt *mgmt = data;
798 	struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
799 	u8 noa_num, index , i , noa_index = 0;
800 	u8 *pos, *end, *ie;
801 	u16 noa_len;
802 	static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
803 
804 	pos = (u8 *)&mgmt->u.action.category;
805 	end = data + len;
806 	ie = NULL;
807 
808 	if (pos[0] == 0x7f) {
809 		if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
810 			ie = pos + 3+4;
811 	}
812 
813 	if (ie == NULL)
814 		return;
815 
816 	rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
817 	/*to find noa ie*/
818 	while (ie + 1 < end) {
819 		noa_len = le16_to_cpu(*(__le16 *)&ie[1]);
820 		if (ie + 3 + ie[1] > end)
821 			return;
822 
823 		if (ie[0] == 12) {
824 			rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
825 			RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
826 				      ie, noa_len);
827 			if ((noa_len - 2) % 13 != 0) {
828 				rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD,
829 					"P2P notice of absence: invalid length.%d\n",
830 					noa_len);
831 				return;
832 			} else {
833 				noa_num = (noa_len - 2) / 13;
834 				if (noa_num > P2P_MAX_NOA_NUM)
835 					noa_num = P2P_MAX_NOA_NUM;
836 
837 			}
838 			noa_index = ie[3];
839 			if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
840 			    P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
841 				p2pinfo->noa_index = noa_index;
842 				p2pinfo->opp_ps = (ie[4] >> 7);
843 				p2pinfo->ctwindow = ie[4] & 0x7F;
844 				p2pinfo->noa_num = noa_num;
845 				index = 5;
846 				for (i = 0; i < noa_num; i++) {
847 					p2pinfo->noa_count_type[i] =
848 					 *(u8 *)(ie + index);
849 					index += 1;
850 					p2pinfo->noa_duration[i] =
851 					 le32_to_cpu(*(__le32 *)(ie + index));
852 					index += 4;
853 					p2pinfo->noa_interval[i] =
854 					 le32_to_cpu(*(__le32 *)(ie + index));
855 					index += 4;
856 					p2pinfo->noa_start_time[i] =
857 					 le32_to_cpu(*(__le32 *)(ie + index));
858 					index += 4;
859 				}
860 
861 				if (p2pinfo->opp_ps == 1) {
862 					p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
863 					/* Driver should wait LPS entering
864 					 * CTWindow
865 					 */
866 					if (rtlpriv->psc.fw_current_inpsmode)
867 						rtl_p2p_ps_cmd(hw,
868 							       P2P_PS_ENABLE);
869 				} else if (p2pinfo->noa_num > 0) {
870 					p2pinfo->p2p_ps_mode = P2P_PS_NOA;
871 					rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
872 				} else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
873 					rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
874 				}
875 			}
876 			break;
877 		}
878 		ie += 3 + noa_len;
879 	}
880 }
881 
rtl_p2p_ps_cmd(struct ieee80211_hw * hw,u8 p2p_ps_state)882 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state)
883 {
884 	struct rtl_priv *rtlpriv = rtl_priv(hw);
885 	struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
886 	struct rtl_p2p_ps_info  *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
887 
888 	rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n", p2p_ps_state);
889 	switch (p2p_ps_state) {
890 	case P2P_PS_DISABLE:
891 		p2pinfo->p2p_ps_state = p2p_ps_state;
892 		rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
893 					      &p2p_ps_state);
894 		p2pinfo->noa_index = 0;
895 		p2pinfo->ctwindow = 0;
896 		p2pinfo->opp_ps = 0;
897 		p2pinfo->noa_num = 0;
898 		p2pinfo->p2p_ps_mode = P2P_PS_NONE;
899 		if (rtlps->fw_current_inpsmode) {
900 			if (rtlps->smart_ps == 0) {
901 				rtlps->smart_ps = 2;
902 				rtlpriv->cfg->ops->set_hw_reg(hw,
903 					 HW_VAR_H2C_FW_PWRMODE,
904 					 &rtlps->pwr_mode);
905 			}
906 
907 		}
908 		break;
909 	case P2P_PS_ENABLE:
910 		if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
911 			p2pinfo->p2p_ps_state = p2p_ps_state;
912 
913 			if (p2pinfo->ctwindow > 0) {
914 				if (rtlps->smart_ps != 0) {
915 					rtlps->smart_ps = 0;
916 					rtlpriv->cfg->ops->set_hw_reg(hw,
917 						 HW_VAR_H2C_FW_PWRMODE,
918 						 &rtlps->pwr_mode);
919 				}
920 			}
921 			rtlpriv->cfg->ops->set_hw_reg(hw,
922 				 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
923 				 &p2p_ps_state);
924 
925 		}
926 		break;
927 	case P2P_PS_SCAN:
928 	case P2P_PS_SCAN_DONE:
929 	case P2P_PS_ALLSTASLEEP:
930 		if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
931 			p2pinfo->p2p_ps_state = p2p_ps_state;
932 			rtlpriv->cfg->ops->set_hw_reg(hw,
933 				 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
934 				 &p2p_ps_state);
935 		}
936 		break;
937 	default:
938 		break;
939 	}
940 	rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD,
941 		"ctwindow %x oppps %x\n",
942 		p2pinfo->ctwindow, p2pinfo->opp_ps);
943 	rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD,
944 		"count %x duration %x index %x interval %x start time %x noa num %x\n",
945 		p2pinfo->noa_count_type[0],
946 		p2pinfo->noa_duration[0],
947 		p2pinfo->noa_index,
948 		p2pinfo->noa_interval[0],
949 		p2pinfo->noa_start_time[0],
950 		p2pinfo->noa_num);
951 	rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
952 }
953 
rtl_p2p_info(struct ieee80211_hw * hw,void * data,unsigned int len)954 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
955 {
956 	struct rtl_priv *rtlpriv = rtl_priv(hw);
957 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
958 	struct ieee80211_hdr *hdr = data;
959 
960 	if (!mac->p2p)
961 		return;
962 	if (mac->link_state != MAC80211_LINKED)
963 		return;
964 	/* min. beacon length + FCS_LEN */
965 	if (len <= 40 + FCS_LEN)
966 		return;
967 
968 	/* and only beacons from the associated BSSID, please */
969 	if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
970 		return;
971 
972 	/* check if this really is a beacon */
973 	if (!(ieee80211_is_beacon(hdr->frame_control) ||
974 	      ieee80211_is_probe_resp(hdr->frame_control) ||
975 	      ieee80211_is_action(hdr->frame_control)))
976 		return;
977 
978 	if (ieee80211_is_action(hdr->frame_control))
979 		rtl_p2p_action_ie(hw , data , len - FCS_LEN);
980 	else
981 		rtl_p2p_noa_ie(hw , data , len - FCS_LEN);
982 }
983 EXPORT_SYMBOL_GPL(rtl_p2p_info);
984