1 /******************************************************************************
2 *
3 * Copyright(c) 2009-2012 Realtek Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * The full GNU General Public License is included in this distribution in the
15 * file called LICENSE.
16 *
17 * Contact Information:
18 * wlanfae <wlanfae@realtek.com>
19 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
20 * Hsinchu 300, Taiwan.
21 *
22 * Larry Finger <Larry.Finger@lwfinger.net>
23 *
24 *****************************************************************************/
25
26 #include "wifi.h"
27 #include "base.h"
28 #include "ps.h"
29 #include <linux/export.h>
30 #include "btcoexist/rtl_btc.h"
31
rtl_ps_enable_nic(struct ieee80211_hw * hw)32 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
33 {
34 struct rtl_priv *rtlpriv = rtl_priv(hw);
35 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
36 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
37 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
38
39 /*<1> reset trx ring */
40 if (rtlhal->interface == INTF_PCI)
41 rtlpriv->intf_ops->reset_trx_ring(hw);
42
43 if (is_hal_stop(rtlhal))
44 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
45 "Driver is already down!\n");
46
47 /*<2> Enable Adapter */
48 if (rtlpriv->cfg->ops->hw_init(hw))
49 return false;
50 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RETRY_LIMIT,
51 &rtlmac->retry_long);
52 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
53
54 rtlpriv->cfg->ops->switch_channel(hw);
55 rtlpriv->cfg->ops->set_channel_access(hw);
56 rtlpriv->cfg->ops->set_bw_mode(hw,
57 cfg80211_get_chandef_type(&hw->conf.chandef));
58
59 /*<3> Enable Interrupt */
60 rtlpriv->cfg->ops->enable_interrupt(hw);
61
62 /*<enable timer> */
63 rtl_watch_dog_timer_callback(&rtlpriv->works.watchdog_timer);
64
65 return true;
66 }
67 EXPORT_SYMBOL(rtl_ps_enable_nic);
68
rtl_ps_disable_nic(struct ieee80211_hw * hw)69 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
70 {
71 struct rtl_priv *rtlpriv = rtl_priv(hw);
72
73 /*<1> Stop all timer */
74 rtl_deinit_deferred_work(hw, true);
75
76 /*<2> Disable Interrupt */
77 rtlpriv->cfg->ops->disable_interrupt(hw);
78 tasklet_kill(&rtlpriv->works.irq_tasklet);
79
80 /*<3> Disable Adapter */
81 rtlpriv->cfg->ops->hw_disable(hw);
82
83 return true;
84 }
85 EXPORT_SYMBOL(rtl_ps_disable_nic);
86
rtl_ps_set_rf_state(struct ieee80211_hw * hw,enum rf_pwrstate state_toset,u32 changesource)87 static bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
88 enum rf_pwrstate state_toset,
89 u32 changesource)
90 {
91 struct rtl_priv *rtlpriv = rtl_priv(hw);
92 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
93 enum rf_pwrstate rtstate;
94 bool actionallowed = false;
95 u16 rfwait_cnt = 0;
96
97 /*Only one thread can change
98 *the RF state at one time, and others
99 *should wait to be executed.
100 */
101 while (true) {
102 spin_lock(&rtlpriv->locks.rf_ps_lock);
103 if (ppsc->rfchange_inprogress) {
104 spin_unlock(&rtlpriv->locks.rf_ps_lock);
105
106 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
107 "RF Change in progress! Wait to set..state_toset(%d).\n",
108 state_toset);
109
110 /* Set RF after the previous action is done. */
111 while (ppsc->rfchange_inprogress) {
112 rfwait_cnt++;
113 mdelay(1);
114 /*Wait too long, return false to avoid
115 *to be stuck here.
116 */
117 if (rfwait_cnt > 100)
118 return false;
119 }
120 } else {
121 ppsc->rfchange_inprogress = true;
122 spin_unlock(&rtlpriv->locks.rf_ps_lock);
123 break;
124 }
125 }
126
127 rtstate = ppsc->rfpwr_state;
128
129 switch (state_toset) {
130 case ERFON:
131 ppsc->rfoff_reason &= (~changesource);
132
133 if ((changesource == RF_CHANGE_BY_HW) &&
134 (ppsc->hwradiooff)) {
135 ppsc->hwradiooff = false;
136 }
137
138 if (!ppsc->rfoff_reason) {
139 ppsc->rfoff_reason = 0;
140 actionallowed = true;
141 }
142
143 break;
144
145 case ERFOFF:
146
147 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
148 ppsc->hwradiooff = true;
149 }
150
151 ppsc->rfoff_reason |= changesource;
152 actionallowed = true;
153 break;
154
155 case ERFSLEEP:
156 ppsc->rfoff_reason |= changesource;
157 actionallowed = true;
158 break;
159
160 default:
161 pr_err("switch case %#x not processed\n", state_toset);
162 break;
163 }
164
165 if (actionallowed)
166 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
167
168 spin_lock(&rtlpriv->locks.rf_ps_lock);
169 ppsc->rfchange_inprogress = false;
170 spin_unlock(&rtlpriv->locks.rf_ps_lock);
171
172 return actionallowed;
173 }
174
_rtl_ps_inactive_ps(struct ieee80211_hw * hw)175 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
176 {
177 struct rtl_priv *rtlpriv = rtl_priv(hw);
178 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
179 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
180
181 ppsc->swrf_processing = true;
182
183 if (ppsc->inactive_pwrstate == ERFON &&
184 rtlhal->interface == INTF_PCI) {
185 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
186 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
187 rtlhal->interface == INTF_PCI) {
188 rtlpriv->intf_ops->disable_aspm(hw);
189 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
190 }
191 }
192
193 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
194 RF_CHANGE_BY_IPS);
195
196 if (ppsc->inactive_pwrstate == ERFOFF &&
197 rtlhal->interface == INTF_PCI) {
198 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
199 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
200 rtlpriv->intf_ops->enable_aspm(hw);
201 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
202 }
203 }
204
205 ppsc->swrf_processing = false;
206 }
207
rtl_ips_nic_off_wq_callback(void * data)208 void rtl_ips_nic_off_wq_callback(void *data)
209 {
210 struct rtl_works *rtlworks =
211 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
212 struct ieee80211_hw *hw = rtlworks->hw;
213 struct rtl_priv *rtlpriv = rtl_priv(hw);
214 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
215 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
216 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
217 enum rf_pwrstate rtstate;
218
219 if (mac->opmode != NL80211_IFTYPE_STATION) {
220 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
221 "not station return\n");
222 return;
223 }
224
225 if (mac->p2p_in_use)
226 return;
227
228 if (mac->link_state > MAC80211_NOLINK)
229 return;
230
231 if (is_hal_stop(rtlhal))
232 return;
233
234 if (rtlpriv->sec.being_setkey)
235 return;
236
237 if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
238 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
239
240 if (ppsc->inactiveps) {
241 rtstate = ppsc->rfpwr_state;
242
243 /*
244 *Do not enter IPS in the following conditions:
245 *(1) RF is already OFF or Sleep
246 *(2) swrf_processing (indicates the IPS is still under going)
247 *(3) Connectted (only disconnected can trigger IPS)
248 *(4) IBSS (send Beacon)
249 *(5) AP mode (send Beacon)
250 *(6) monitor mode (rcv packet)
251 */
252
253 if (rtstate == ERFON &&
254 !ppsc->swrf_processing &&
255 (mac->link_state == MAC80211_NOLINK) &&
256 !mac->act_scanning) {
257 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
258 "IPSEnter(): Turn off RF\n");
259
260 ppsc->inactive_pwrstate = ERFOFF;
261 ppsc->in_powersavemode = true;
262
263 /* call before RF off */
264 if (rtlpriv->cfg->ops->get_btc_status())
265 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
266 ppsc->inactive_pwrstate);
267
268 /*rtl_pci_reset_trx_ring(hw); */
269 _rtl_ps_inactive_ps(hw);
270 }
271 }
272 }
273
rtl_ips_nic_off(struct ieee80211_hw * hw)274 void rtl_ips_nic_off(struct ieee80211_hw *hw)
275 {
276 struct rtl_priv *rtlpriv = rtl_priv(hw);
277
278 /* because when link with ap, mac80211 will ask us
279 * to disable nic quickly after scan before linking,
280 * this will cause link failed, so we delay 100ms here
281 */
282 queue_delayed_work(rtlpriv->works.rtl_wq,
283 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
284 }
285
286 /* NOTICE: any opmode should exc nic_on, or disable without
287 * nic_on may something wrong, like adhoc TP
288 */
rtl_ips_nic_on(struct ieee80211_hw * hw)289 void rtl_ips_nic_on(struct ieee80211_hw *hw)
290 {
291 struct rtl_priv *rtlpriv = rtl_priv(hw);
292 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
293 enum rf_pwrstate rtstate;
294
295 cancel_delayed_work_sync(&rtlpriv->works.ips_nic_off_wq);
296
297 mutex_lock(&rtlpriv->locks.ips_mutex);
298 if (ppsc->inactiveps) {
299 rtstate = ppsc->rfpwr_state;
300
301 if (rtstate != ERFON &&
302 !ppsc->swrf_processing &&
303 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
304
305 ppsc->inactive_pwrstate = ERFON;
306 ppsc->in_powersavemode = false;
307 _rtl_ps_inactive_ps(hw);
308 /* call after RF on */
309 if (rtlpriv->cfg->ops->get_btc_status())
310 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
311 ppsc->inactive_pwrstate);
312 }
313 }
314 mutex_unlock(&rtlpriv->locks.ips_mutex);
315 }
316 EXPORT_SYMBOL_GPL(rtl_ips_nic_on);
317
318 /*for FW LPS*/
319
320 /*
321 *Determine if we can set Fw into PS mode
322 *in current condition.Return TRUE if it
323 *can enter PS mode.
324 */
rtl_get_fwlps_doze(struct ieee80211_hw * hw)325 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
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 u32 ps_timediff;
331
332 ps_timediff = jiffies_to_msecs(jiffies -
333 ppsc->last_delaylps_stamp_jiffies);
334
335 if (ps_timediff < 2000) {
336 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
337 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
338 return false;
339 }
340
341 if (mac->link_state != MAC80211_LINKED)
342 return false;
343
344 if (mac->opmode == NL80211_IFTYPE_ADHOC)
345 return false;
346
347 return true;
348 }
349
350 /* Change current and default preamble mode.*/
rtl_lps_set_psmode(struct ieee80211_hw * hw,u8 rt_psmode)351 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
352 {
353 struct rtl_priv *rtlpriv = rtl_priv(hw);
354 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
355 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
356 bool enter_fwlps;
357
358 if (mac->opmode == NL80211_IFTYPE_ADHOC)
359 return;
360
361 if (mac->link_state != MAC80211_LINKED)
362 return;
363
364 if (ppsc->dot11_psmode == rt_psmode && rt_psmode == EACTIVE)
365 return;
366
367 /* Update power save mode configured. */
368 ppsc->dot11_psmode = rt_psmode;
369
370 /*
371 *<FW control LPS>
372 *1. Enter PS mode
373 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
374 * cmd to set Fw into PS mode.
375 *2. Leave PS mode
376 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
377 * mode and set RPWM to turn RF on.
378 */
379
380 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
381 if (ppsc->dot11_psmode == EACTIVE) {
382 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
383 "FW LPS leave ps_mode:%x\n",
384 FW_PS_ACTIVE_MODE);
385 enter_fwlps = false;
386 ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
387 ppsc->smart_ps = 0;
388 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
389 (u8 *)(&enter_fwlps));
390 if (ppsc->p2p_ps_info.opp_ps)
391 rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE);
392
393 if (rtlpriv->cfg->ops->get_btc_status())
394 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
395 } else {
396 if (rtl_get_fwlps_doze(hw)) {
397 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
398 "FW LPS enter ps_mode:%x\n",
399 ppsc->fwctrl_psmode);
400 if (rtlpriv->cfg->ops->get_btc_status())
401 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
402 enter_fwlps = true;
403 ppsc->pwr_mode = ppsc->fwctrl_psmode;
404 ppsc->smart_ps = 2;
405 rtlpriv->cfg->ops->set_hw_reg(hw,
406 HW_VAR_FW_LPS_ACTION,
407 (u8 *)(&enter_fwlps));
408
409 } else {
410 /* Reset the power save related parameters. */
411 ppsc->dot11_psmode = EACTIVE;
412 }
413 }
414 }
415 }
416
417 /* Interrupt safe routine to enter the leisure power save mode.*/
rtl_lps_enter_core(struct ieee80211_hw * hw)418 static void rtl_lps_enter_core(struct ieee80211_hw *hw)
419 {
420 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
421 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
422 struct rtl_priv *rtlpriv = rtl_priv(hw);
423
424 if (!ppsc->fwctrl_lps)
425 return;
426
427 if (rtlpriv->sec.being_setkey)
428 return;
429
430 if (rtlpriv->link_info.busytraffic)
431 return;
432
433 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
434 if (mac->cnt_after_linked < 5)
435 return;
436
437 if (mac->opmode == NL80211_IFTYPE_ADHOC)
438 return;
439
440 if (mac->link_state != MAC80211_LINKED)
441 return;
442
443 mutex_lock(&rtlpriv->locks.lps_mutex);
444
445 /* Don't need to check (ppsc->dot11_psmode == EACTIVE), because
446 * bt_ccoexist may ask to enter lps.
447 * In normal case, this constraint move to rtl_lps_set_psmode().
448 */
449 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
450 "Enter 802.11 power save mode...\n");
451 rtl_lps_set_psmode(hw, EAUTOPS);
452
453 mutex_unlock(&rtlpriv->locks.lps_mutex);
454 }
455
456 /* Interrupt safe routine to leave the leisure power save mode.*/
rtl_lps_leave_core(struct ieee80211_hw * hw)457 static void rtl_lps_leave_core(struct ieee80211_hw *hw)
458 {
459 struct rtl_priv *rtlpriv = rtl_priv(hw);
460 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
461 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
462
463 mutex_lock(&rtlpriv->locks.lps_mutex);
464
465 if (ppsc->fwctrl_lps) {
466 if (ppsc->dot11_psmode != EACTIVE) {
467
468 /*FIX ME */
469 /*rtlpriv->cfg->ops->enable_interrupt(hw); */
470
471 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
472 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
473 rtlhal->interface == INTF_PCI) {
474 rtlpriv->intf_ops->disable_aspm(hw);
475 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
476 }
477
478 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
479 "Busy Traffic,Leave 802.11 power save..\n");
480
481 rtl_lps_set_psmode(hw, EACTIVE);
482 }
483 }
484 mutex_unlock(&rtlpriv->locks.lps_mutex);
485 }
486
487 /* For sw LPS*/
rtl_swlps_beacon(struct ieee80211_hw * hw,void * data,unsigned int len)488 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
489 {
490 struct rtl_priv *rtlpriv = rtl_priv(hw);
491 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
492 struct ieee80211_hdr *hdr = data;
493 struct ieee80211_tim_ie *tim_ie;
494 u8 *tim;
495 u8 tim_len;
496 bool u_buffed;
497 bool m_buffed;
498
499 if (mac->opmode != NL80211_IFTYPE_STATION)
500 return;
501
502 if (!rtlpriv->psc.swctrl_lps)
503 return;
504
505 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
506 return;
507
508 if (!rtlpriv->psc.sw_ps_enabled)
509 return;
510
511 if (rtlpriv->psc.fwctrl_lps)
512 return;
513
514 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
515 return;
516
517 /* check if this really is a beacon */
518 if (!ieee80211_is_beacon(hdr->frame_control))
519 return;
520
521 /* min. beacon length + FCS_LEN */
522 if (len <= 40 + FCS_LEN)
523 return;
524
525 /* and only beacons from the associated BSSID, please */
526 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
527 return;
528
529 rtlpriv->psc.last_beacon = jiffies;
530
531 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
532 if (!tim)
533 return;
534
535 if (tim[1] < sizeof(*tim_ie))
536 return;
537
538 tim_len = tim[1];
539 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
540
541 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
542 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
543
544 /* Check whenever the PHY can be turned off again. */
545
546 /* 1. What about buffered unicast traffic for our AID? */
547 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
548 rtlpriv->mac80211.assoc_id);
549
550 /* 2. Maybe the AP wants to send multicast/broadcast data? */
551 m_buffed = tim_ie->bitmap_ctrl & 0x01;
552 rtlpriv->psc.multi_buffered = m_buffed;
553
554 /* unicast will process by mac80211 through
555 * set ~IEEE80211_CONF_PS, So we just check
556 * multicast frames here */
557 if (!m_buffed) {
558 /* back to low-power land. and delay is
559 * prevent null power save frame tx fail */
560 queue_delayed_work(rtlpriv->works.rtl_wq,
561 &rtlpriv->works.ps_work, MSECS(5));
562 } else {
563 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
564 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
565 }
566 }
567 EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
568
rtl_swlps_rf_awake(struct ieee80211_hw * hw)569 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
570 {
571 struct rtl_priv *rtlpriv = rtl_priv(hw);
572 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
573 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
574
575 if (!rtlpriv->psc.swctrl_lps)
576 return;
577 if (mac->link_state != MAC80211_LINKED)
578 return;
579
580 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
581 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
582 rtlpriv->intf_ops->disable_aspm(hw);
583 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
584 }
585
586 mutex_lock(&rtlpriv->locks.lps_mutex);
587 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
588 mutex_unlock(&rtlpriv->locks.lps_mutex);
589 }
590
rtl_swlps_rfon_wq_callback(void * data)591 void rtl_swlps_rfon_wq_callback(void *data)
592 {
593 struct rtl_works *rtlworks =
594 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
595 struct ieee80211_hw *hw = rtlworks->hw;
596
597 rtl_swlps_rf_awake(hw);
598 }
599
rtl_swlps_rf_sleep(struct ieee80211_hw * hw)600 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
601 {
602 struct rtl_priv *rtlpriv = rtl_priv(hw);
603 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
604 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
605 u8 sleep_intv;
606
607 if (!rtlpriv->psc.sw_ps_enabled)
608 return;
609
610 if ((rtlpriv->sec.being_setkey) ||
611 (mac->opmode == NL80211_IFTYPE_ADHOC))
612 return;
613
614 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
615 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
616 return;
617
618 if (rtlpriv->link_info.busytraffic)
619 return;
620
621 spin_lock(&rtlpriv->locks.rf_ps_lock);
622 if (rtlpriv->psc.rfchange_inprogress) {
623 spin_unlock(&rtlpriv->locks.rf_ps_lock);
624 return;
625 }
626 spin_unlock(&rtlpriv->locks.rf_ps_lock);
627
628 mutex_lock(&rtlpriv->locks.lps_mutex);
629 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
630 mutex_unlock(&rtlpriv->locks.lps_mutex);
631
632 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
633 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
634 rtlpriv->intf_ops->enable_aspm(hw);
635 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
636 }
637
638 /* here is power save alg, when this beacon is DTIM
639 * we will set sleep time to dtim_period * n;
640 * when this beacon is not DTIM, we will set sleep
641 * time to sleep_intv = rtlpriv->psc.dtim_counter or
642 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
643
644 if (rtlpriv->psc.dtim_counter == 0) {
645 if (hw->conf.ps_dtim_period == 1)
646 sleep_intv = hw->conf.ps_dtim_period * 2;
647 else
648 sleep_intv = hw->conf.ps_dtim_period;
649 } else {
650 sleep_intv = rtlpriv->psc.dtim_counter;
651 }
652
653 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
654 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
655
656 /* this print should always be dtim_conter = 0 &
657 * sleep = dtim_period, that meaons, we should
658 * awake before every dtim */
659 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
660 "dtim_counter:%x will sleep :%d beacon_intv\n",
661 rtlpriv->psc.dtim_counter, sleep_intv);
662
663 /* we tested that 40ms is enough for sw & hw sw delay */
664 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
665 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
666 }
667
rtl_lps_change_work_callback(struct work_struct * work)668 void rtl_lps_change_work_callback(struct work_struct *work)
669 {
670 struct rtl_works *rtlworks =
671 container_of(work, struct rtl_works, lps_change_work);
672 struct ieee80211_hw *hw = rtlworks->hw;
673 struct rtl_priv *rtlpriv = rtl_priv(hw);
674
675 if (rtlpriv->enter_ps)
676 rtl_lps_enter_core(hw);
677 else
678 rtl_lps_leave_core(hw);
679 }
680 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
681
rtl_lps_enter(struct ieee80211_hw * hw)682 void rtl_lps_enter(struct ieee80211_hw *hw)
683 {
684 struct rtl_priv *rtlpriv = rtl_priv(hw);
685
686 if (!in_interrupt())
687 return rtl_lps_enter_core(hw);
688 rtlpriv->enter_ps = true;
689 schedule_work(&rtlpriv->works.lps_change_work);
690 }
691 EXPORT_SYMBOL_GPL(rtl_lps_enter);
692
rtl_lps_leave(struct ieee80211_hw * hw)693 void rtl_lps_leave(struct ieee80211_hw *hw)
694 {
695 struct rtl_priv *rtlpriv = rtl_priv(hw);
696
697 if (!in_interrupt())
698 return rtl_lps_leave_core(hw);
699 rtlpriv->enter_ps = false;
700 schedule_work(&rtlpriv->works.lps_change_work);
701 }
702 EXPORT_SYMBOL_GPL(rtl_lps_leave);
703
rtl_swlps_wq_callback(void * data)704 void rtl_swlps_wq_callback(void *data)
705 {
706 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
707 struct rtl_works,
708 ps_work);
709 struct ieee80211_hw *hw = rtlworks->hw;
710 struct rtl_priv *rtlpriv = rtl_priv(hw);
711 bool ps = false;
712
713 ps = (hw->conf.flags & IEEE80211_CONF_PS);
714
715 /* we can sleep after ps null send ok */
716 if (rtlpriv->psc.state_inap) {
717 rtl_swlps_rf_sleep(hw);
718
719 if (rtlpriv->psc.state && !ps) {
720 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
721 rtlpriv->psc.last_action);
722 }
723
724 if (ps)
725 rtlpriv->psc.last_slept = jiffies;
726
727 rtlpriv->psc.last_action = jiffies;
728 rtlpriv->psc.state = ps;
729 }
730 }
731
rtl_p2p_noa_ie(struct ieee80211_hw * hw,void * data,unsigned int len)732 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
733 unsigned int len)
734 {
735 struct rtl_priv *rtlpriv = rtl_priv(hw);
736 struct ieee80211_mgmt *mgmt = data;
737 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
738 u8 *pos, *end, *ie;
739 u16 noa_len;
740 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
741 u8 noa_num, index , i, noa_index = 0;
742 bool find_p2p_ie = false , find_p2p_ps_ie = false;
743 pos = (u8 *)mgmt->u.beacon.variable;
744 end = data + len;
745 ie = NULL;
746
747 while (pos + 1 < end) {
748 if (pos + 2 + pos[1] > end)
749 return;
750
751 if (pos[0] == 221 && pos[1] > 4) {
752 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
753 ie = pos + 2+4;
754 break;
755 }
756 }
757 pos += 2 + pos[1];
758 }
759
760 if (ie == NULL)
761 return;
762 find_p2p_ie = true;
763 /*to find noa ie*/
764 while (ie + 1 < end) {
765 noa_len = READEF2BYTE((__le16 *)&ie[1]);
766 if (ie + 3 + ie[1] > end)
767 return;
768
769 if (ie[0] == 12) {
770 find_p2p_ps_ie = true;
771 if ((noa_len - 2) % 13 != 0) {
772 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
773 "P2P notice of absence: invalid length.%d\n",
774 noa_len);
775 return;
776 } else {
777 noa_num = (noa_len - 2) / 13;
778 }
779 noa_index = ie[3];
780 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
781 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
782 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
783 "update NOA ie.\n");
784 p2pinfo->noa_index = noa_index;
785 p2pinfo->opp_ps = (ie[4] >> 7);
786 p2pinfo->ctwindow = ie[4] & 0x7F;
787 p2pinfo->noa_num = noa_num;
788 index = 5;
789 for (i = 0; i < noa_num; i++) {
790 p2pinfo->noa_count_type[i] =
791 READEF1BYTE(ie+index);
792 index += 1;
793 p2pinfo->noa_duration[i] =
794 READEF4BYTE((__le32 *)ie+index);
795 index += 4;
796 p2pinfo->noa_interval[i] =
797 READEF4BYTE((__le32 *)ie+index);
798 index += 4;
799 p2pinfo->noa_start_time[i] =
800 READEF4BYTE((__le32 *)ie+index);
801 index += 4;
802 }
803
804 if (p2pinfo->opp_ps == 1) {
805 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
806 /* Driver should wait LPS entering
807 * CTWindow
808 */
809 if (rtlpriv->psc.fw_current_inpsmode)
810 rtl_p2p_ps_cmd(hw,
811 P2P_PS_ENABLE);
812 } else if (p2pinfo->noa_num > 0) {
813 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
814 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
815 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
816 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
817 }
818 }
819 break;
820 }
821 ie += 3 + noa_len;
822 }
823
824 if (find_p2p_ie == true) {
825 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
826 (find_p2p_ps_ie == false))
827 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
828 }
829 }
830
rtl_p2p_action_ie(struct ieee80211_hw * hw,void * data,unsigned int len)831 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
832 unsigned int len)
833 {
834 struct rtl_priv *rtlpriv = rtl_priv(hw);
835 struct ieee80211_mgmt *mgmt = data;
836 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
837 u8 noa_num, index , i , noa_index = 0;
838 u8 *pos, *end, *ie;
839 u16 noa_len;
840 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
841
842 pos = (u8 *)&mgmt->u.action.category;
843 end = data + len;
844 ie = NULL;
845
846 if (pos[0] == 0x7f) {
847 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
848 ie = pos + 3+4;
849 }
850
851 if (ie == NULL)
852 return;
853
854 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
855 /*to find noa ie*/
856 while (ie + 1 < end) {
857 noa_len = READEF2BYTE((__le16 *)&ie[1]);
858 if (ie + 3 + ie[1] > end)
859 return;
860
861 if (ie[0] == 12) {
862 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
863 RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
864 ie, noa_len);
865 if ((noa_len - 2) % 13 != 0) {
866 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
867 "P2P notice of absence: invalid length.%d\n",
868 noa_len);
869 return;
870 } else {
871 noa_num = (noa_len - 2) / 13;
872 }
873 noa_index = ie[3];
874 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
875 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
876 p2pinfo->noa_index = noa_index;
877 p2pinfo->opp_ps = (ie[4] >> 7);
878 p2pinfo->ctwindow = ie[4] & 0x7F;
879 p2pinfo->noa_num = noa_num;
880 index = 5;
881 for (i = 0; i < noa_num; i++) {
882 p2pinfo->noa_count_type[i] =
883 READEF1BYTE(ie+index);
884 index += 1;
885 p2pinfo->noa_duration[i] =
886 READEF4BYTE((__le32 *)ie+index);
887 index += 4;
888 p2pinfo->noa_interval[i] =
889 READEF4BYTE((__le32 *)ie+index);
890 index += 4;
891 p2pinfo->noa_start_time[i] =
892 READEF4BYTE((__le32 *)ie+index);
893 index += 4;
894 }
895
896 if (p2pinfo->opp_ps == 1) {
897 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
898 /* Driver should wait LPS entering
899 * CTWindow
900 */
901 if (rtlpriv->psc.fw_current_inpsmode)
902 rtl_p2p_ps_cmd(hw,
903 P2P_PS_ENABLE);
904 } else if (p2pinfo->noa_num > 0) {
905 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
906 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
907 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
908 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
909 }
910 }
911 break;
912 }
913 ie += 3 + noa_len;
914 }
915 }
916
rtl_p2p_ps_cmd(struct ieee80211_hw * hw,u8 p2p_ps_state)917 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state)
918 {
919 struct rtl_priv *rtlpriv = rtl_priv(hw);
920 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
921 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
922
923 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n" , p2p_ps_state);
924 switch (p2p_ps_state) {
925 case P2P_PS_DISABLE:
926 p2pinfo->p2p_ps_state = p2p_ps_state;
927 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
928 &p2p_ps_state);
929 p2pinfo->noa_index = 0;
930 p2pinfo->ctwindow = 0;
931 p2pinfo->opp_ps = 0;
932 p2pinfo->noa_num = 0;
933 p2pinfo->p2p_ps_mode = P2P_PS_NONE;
934 if (rtlps->fw_current_inpsmode) {
935 if (rtlps->smart_ps == 0) {
936 rtlps->smart_ps = 2;
937 rtlpriv->cfg->ops->set_hw_reg(hw,
938 HW_VAR_H2C_FW_PWRMODE,
939 &rtlps->pwr_mode);
940 }
941
942 }
943 break;
944 case P2P_PS_ENABLE:
945 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
946 p2pinfo->p2p_ps_state = p2p_ps_state;
947
948 if (p2pinfo->ctwindow > 0) {
949 if (rtlps->smart_ps != 0) {
950 rtlps->smart_ps = 0;
951 rtlpriv->cfg->ops->set_hw_reg(hw,
952 HW_VAR_H2C_FW_PWRMODE,
953 &rtlps->pwr_mode);
954 }
955 }
956 rtlpriv->cfg->ops->set_hw_reg(hw,
957 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
958 &p2p_ps_state);
959
960 }
961 break;
962 case P2P_PS_SCAN:
963 case P2P_PS_SCAN_DONE:
964 case P2P_PS_ALLSTASLEEP:
965 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
966 p2pinfo->p2p_ps_state = p2p_ps_state;
967 rtlpriv->cfg->ops->set_hw_reg(hw,
968 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
969 &p2p_ps_state);
970 }
971 break;
972 default:
973 break;
974 }
975 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
976 "ctwindow %x oppps %x\n",
977 p2pinfo->ctwindow , p2pinfo->opp_ps);
978 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
979 "count %x duration %x index %x interval %x start time %x noa num %x\n",
980 p2pinfo->noa_count_type[0],
981 p2pinfo->noa_duration[0],
982 p2pinfo->noa_index,
983 p2pinfo->noa_interval[0],
984 p2pinfo->noa_start_time[0],
985 p2pinfo->noa_num);
986 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
987 }
988
rtl_p2p_info(struct ieee80211_hw * hw,void * data,unsigned int len)989 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
990 {
991 struct rtl_priv *rtlpriv = rtl_priv(hw);
992 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
993 struct ieee80211_hdr *hdr = data;
994
995 if (!mac->p2p)
996 return;
997 if (mac->link_state != MAC80211_LINKED)
998 return;
999 /* min. beacon length + FCS_LEN */
1000 if (len <= 40 + FCS_LEN)
1001 return;
1002
1003 /* and only beacons from the associated BSSID, please */
1004 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
1005 return;
1006
1007 /* check if this really is a beacon */
1008 if (!(ieee80211_is_beacon(hdr->frame_control) ||
1009 ieee80211_is_probe_resp(hdr->frame_control) ||
1010 ieee80211_is_action(hdr->frame_control)))
1011 return;
1012
1013 if (ieee80211_is_action(hdr->frame_control))
1014 rtl_p2p_action_ie(hw , data , len - FCS_LEN);
1015 else
1016 rtl_p2p_noa_ie(hw , data , len - FCS_LEN);
1017 }
1018 EXPORT_SYMBOL_GPL(rtl_p2p_info);
1019
