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 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * wlanfae <wlanfae@realtek.com>
23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
24 * Hsinchu 300, Taiwan.
25 *
26 * Larry Finger <Larry.Finger@lwfinger.net>
27 *
28 *****************************************************************************/
29
30 #include <linux/export.h>
31 #include "wifi.h"
32 #include "base.h"
33 #include "ps.h"
34
rtl_ps_enable_nic(struct ieee80211_hw * hw)35 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
36 {
37 struct rtl_priv *rtlpriv = rtl_priv(hw);
38 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
39 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
40
41 /*<1> reset trx ring */
42 if (rtlhal->interface == INTF_PCI)
43 rtlpriv->intf_ops->reset_trx_ring(hw);
44
45 if (is_hal_stop(rtlhal))
46 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
47 "Driver is already down!\n");
48
49 /*<2> Enable Adapter */
50 if (rtlpriv->cfg->ops->hw_init(hw))
51 return 1;
52 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
53
54 /*<3> Enable Interrupt */
55 rtlpriv->cfg->ops->enable_interrupt(hw);
56
57 /*<enable timer> */
58 rtl_watch_dog_timer_callback((unsigned long)hw);
59
60 return true;
61 }
62 EXPORT_SYMBOL(rtl_ps_enable_nic);
63
rtl_ps_disable_nic(struct ieee80211_hw * hw)64 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
65 {
66 struct rtl_priv *rtlpriv = rtl_priv(hw);
67
68 /*<1> Stop all timer */
69 rtl_deinit_deferred_work(hw);
70
71 /*<2> Disable Interrupt */
72 rtlpriv->cfg->ops->disable_interrupt(hw);
73 tasklet_kill(&rtlpriv->works.irq_tasklet);
74
75 /*<3> Disable Adapter */
76 rtlpriv->cfg->ops->hw_disable(hw);
77
78 return true;
79 }
80 EXPORT_SYMBOL(rtl_ps_disable_nic);
81
rtl_ps_set_rf_state(struct ieee80211_hw * hw,enum rf_pwrstate state_toset,u32 changesource)82 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
83 enum rf_pwrstate state_toset,
84 u32 changesource)
85 {
86 struct rtl_priv *rtlpriv = rtl_priv(hw);
87 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
88 bool actionallowed = false;
89
90 switch (state_toset) {
91 case ERFON:
92 ppsc->rfoff_reason &= (~changesource);
93
94 if ((changesource == RF_CHANGE_BY_HW) &&
95 (ppsc->hwradiooff)) {
96 ppsc->hwradiooff = false;
97 }
98
99 if (!ppsc->rfoff_reason) {
100 ppsc->rfoff_reason = 0;
101 actionallowed = true;
102 }
103
104 break;
105
106 case ERFOFF:
107
108 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
109 ppsc->hwradiooff = true;
110 }
111
112 ppsc->rfoff_reason |= changesource;
113 actionallowed = true;
114 break;
115
116 case ERFSLEEP:
117 ppsc->rfoff_reason |= changesource;
118 actionallowed = true;
119 break;
120
121 default:
122 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
123 "switch case not processed\n");
124 break;
125 }
126
127 if (actionallowed)
128 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
129
130 return actionallowed;
131 }
132 EXPORT_SYMBOL(rtl_ps_set_rf_state);
133
_rtl_ps_inactive_ps(struct ieee80211_hw * hw)134 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
135 {
136 struct rtl_priv *rtlpriv = rtl_priv(hw);
137 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
138 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
139
140 ppsc->swrf_processing = true;
141
142 if (ppsc->inactive_pwrstate == ERFON &&
143 rtlhal->interface == INTF_PCI) {
144 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
145 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
146 rtlhal->interface == INTF_PCI) {
147 rtlpriv->intf_ops->disable_aspm(hw);
148 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
149 }
150 }
151
152 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate, RF_CHANGE_BY_IPS);
153
154 if (ppsc->inactive_pwrstate == ERFOFF &&
155 rtlhal->interface == INTF_PCI) {
156 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
157 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
158 rtlpriv->intf_ops->enable_aspm(hw);
159 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
160 }
161 }
162
163 ppsc->swrf_processing = false;
164 }
165
rtl_ips_nic_off_wq_callback(void * data)166 void rtl_ips_nic_off_wq_callback(void *data)
167 {
168 struct rtl_works *rtlworks =
169 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
170 struct ieee80211_hw *hw = rtlworks->hw;
171 struct rtl_priv *rtlpriv = rtl_priv(hw);
172 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
173 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
174 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
175 enum rf_pwrstate rtstate;
176
177 if (mac->opmode != NL80211_IFTYPE_STATION) {
178 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
179 "not station return\n");
180 return;
181 }
182
183 if (mac->p2p_in_use)
184 return;
185
186 if (mac->link_state > MAC80211_NOLINK)
187 return;
188
189 if (is_hal_stop(rtlhal))
190 return;
191
192 if (rtlpriv->sec.being_setkey)
193 return;
194
195 if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
196 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
197
198 if (ppsc->inactiveps) {
199 rtstate = ppsc->rfpwr_state;
200
201 /*
202 *Do not enter IPS in the following conditions:
203 *(1) RF is already OFF or Sleep
204 *(2) swrf_processing (indicates the IPS is still under going)
205 *(3) Connectted (only disconnected can trigger IPS)
206 *(4) IBSS (send Beacon)
207 *(5) AP mode (send Beacon)
208 *(6) monitor mode (rcv packet)
209 */
210
211 if (rtstate == ERFON &&
212 !ppsc->swrf_processing &&
213 (mac->link_state == MAC80211_NOLINK) &&
214 !mac->act_scanning) {
215 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
216 "IPSEnter(): Turn off RF\n");
217
218 ppsc->inactive_pwrstate = ERFOFF;
219 ppsc->in_powersavemode = true;
220
221 /*rtl_pci_reset_trx_ring(hw); */
222 _rtl_ps_inactive_ps(hw);
223 }
224 }
225 }
226
rtl_ips_nic_off(struct ieee80211_hw * hw)227 void rtl_ips_nic_off(struct ieee80211_hw *hw)
228 {
229 struct rtl_priv *rtlpriv = rtl_priv(hw);
230
231 /*
232 *because when link with ap, mac80211 will ask us
233 *to disable nic quickly after scan before linking,
234 *this will cause link failed, so we delay 100ms here
235 */
236 queue_delayed_work(rtlpriv->works.rtl_wq,
237 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
238 }
239
240 /* NOTICE: any opmode should exc nic_on, or disable without
241 * nic_on may something wrong, like adhoc TP
242 */
rtl_ips_nic_on(struct ieee80211_hw * hw)243 void rtl_ips_nic_on(struct ieee80211_hw *hw)
244 {
245 struct rtl_priv *rtlpriv = rtl_priv(hw);
246 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
247 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
248 enum rf_pwrstate rtstate;
249 unsigned long flags;
250
251 if (mac->opmode != NL80211_IFTYPE_STATION)
252 return;
253
254 spin_lock_irqsave(&rtlpriv->locks.ips_lock, flags);
255
256 if (ppsc->inactiveps) {
257 rtstate = ppsc->rfpwr_state;
258
259 if (rtstate != ERFON &&
260 !ppsc->swrf_processing &&
261 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
262
263 ppsc->inactive_pwrstate = ERFON;
264 ppsc->in_powersavemode = false;
265
266 _rtl_ps_inactive_ps(hw);
267 }
268 }
269
270 spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
271 }
272
273 /*for FW LPS*/
274
275 /*
276 *Determine if we can set Fw into PS mode
277 *in current condition.Return TRUE if it
278 *can enter PS mode.
279 */
rtl_get_fwlps_doze(struct ieee80211_hw * hw)280 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
281 {
282 struct rtl_priv *rtlpriv = rtl_priv(hw);
283 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
284 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
285 u32 ps_timediff;
286
287 ps_timediff = jiffies_to_msecs(jiffies -
288 ppsc->last_delaylps_stamp_jiffies);
289
290 if (ps_timediff < 2000) {
291 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
292 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
293 return false;
294 }
295
296 if (mac->link_state != MAC80211_LINKED)
297 return false;
298
299 if (mac->opmode == NL80211_IFTYPE_ADHOC)
300 return false;
301
302 return true;
303 }
304
305 /* Change current and default preamble mode.*/
rtl_lps_set_psmode(struct ieee80211_hw * hw,u8 rt_psmode)306 static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
307 {
308 struct rtl_priv *rtlpriv = rtl_priv(hw);
309 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
310 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
311 bool enter_fwlps;
312
313 if (mac->opmode == NL80211_IFTYPE_ADHOC)
314 return;
315
316 if (mac->link_state != MAC80211_LINKED)
317 return;
318
319 if (ppsc->dot11_psmode == rt_psmode)
320 return;
321
322 /* Update power save mode configured. */
323 ppsc->dot11_psmode = rt_psmode;
324
325 /*
326 *<FW control LPS>
327 *1. Enter PS mode
328 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
329 * cmd to set Fw into PS mode.
330 *2. Leave PS mode
331 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
332 * mode and set RPWM to turn RF on.
333 */
334
335 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
336 if (ppsc->dot11_psmode == EACTIVE) {
337 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
338 "FW LPS leave ps_mode:%x\n",
339 FW_PS_ACTIVE_MODE);
340 enter_fwlps = false;
341 ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
342 ppsc->smart_ps = 0;
343 rtlpriv->cfg->ops->set_hw_reg(hw,
344 HW_VAR_FW_LPS_ACTION,
345 (u8 *)(&enter_fwlps));
346 if (ppsc->p2p_ps_info.opp_ps)
347 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
348
349 } else {
350 if (rtl_get_fwlps_doze(hw)) {
351 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
352 "FW LPS enter ps_mode:%x\n",
353 ppsc->fwctrl_psmode);
354 enter_fwlps = true;
355 ppsc->pwr_mode = ppsc->fwctrl_psmode;
356 ppsc->smart_ps = 2;
357 rtlpriv->cfg->ops->set_hw_reg(hw,
358 HW_VAR_FW_LPS_ACTION,
359 (u8 *)(&enter_fwlps));
360
361 } else {
362 /* Reset the power save related parameters. */
363 ppsc->dot11_psmode = EACTIVE;
364 }
365 }
366 }
367 }
368
369 /*Enter the leisure power save mode.*/
rtl_lps_enter(struct ieee80211_hw * hw)370 void rtl_lps_enter(struct ieee80211_hw *hw)
371 {
372 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
373 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
374 struct rtl_priv *rtlpriv = rtl_priv(hw);
375
376 if (!ppsc->fwctrl_lps)
377 return;
378
379 if (rtlpriv->sec.being_setkey)
380 return;
381
382 if (rtlpriv->link_info.busytraffic)
383 return;
384
385 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
386 if (mac->cnt_after_linked < 5)
387 return;
388
389 if (mac->opmode == NL80211_IFTYPE_ADHOC)
390 return;
391
392 if (mac->link_state != MAC80211_LINKED)
393 return;
394
395 mutex_lock(&rtlpriv->locks.ps_mutex);
396
397 /* Idle for a while if we connect to AP a while ago. */
398 if (mac->cnt_after_linked >= 2) {
399 if (ppsc->dot11_psmode == EACTIVE) {
400 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
401 "Enter 802.11 power save mode...\n");
402
403 rtl_lps_set_psmode(hw, EAUTOPS);
404 }
405 }
406
407 mutex_unlock(&rtlpriv->locks.ps_mutex);
408 }
409
410 /*Leave the leisure power save mode.*/
rtl_lps_leave(struct ieee80211_hw * hw)411 void rtl_lps_leave(struct ieee80211_hw *hw)
412 {
413 struct rtl_priv *rtlpriv = rtl_priv(hw);
414 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
415 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
416
417 mutex_lock(&rtlpriv->locks.ps_mutex);
418
419 if (ppsc->fwctrl_lps) {
420 if (ppsc->dot11_psmode != EACTIVE) {
421
422 /*FIX ME */
423 rtlpriv->cfg->ops->enable_interrupt(hw);
424
425 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
426 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
427 rtlhal->interface == INTF_PCI) {
428 rtlpriv->intf_ops->disable_aspm(hw);
429 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
430 }
431
432 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
433 "Busy Traffic,Leave 802.11 power save..\n");
434
435 rtl_lps_set_psmode(hw, EACTIVE);
436 }
437 }
438 mutex_unlock(&rtlpriv->locks.ps_mutex);
439 }
440
441 /* For sw LPS*/
rtl_swlps_beacon(struct ieee80211_hw * hw,void * data,unsigned int len)442 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
443 {
444 struct rtl_priv *rtlpriv = rtl_priv(hw);
445 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
446 struct ieee80211_hdr *hdr = data;
447 struct ieee80211_tim_ie *tim_ie;
448 u8 *tim;
449 u8 tim_len;
450 bool u_buffed;
451 bool m_buffed;
452
453 if (mac->opmode != NL80211_IFTYPE_STATION)
454 return;
455
456 if (!rtlpriv->psc.swctrl_lps)
457 return;
458
459 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
460 return;
461
462 if (!rtlpriv->psc.sw_ps_enabled)
463 return;
464
465 if (rtlpriv->psc.fwctrl_lps)
466 return;
467
468 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
469 return;
470
471 /* check if this really is a beacon */
472 if (!ieee80211_is_beacon(hdr->frame_control))
473 return;
474
475 /* min. beacon length + FCS_LEN */
476 if (len <= 40 + FCS_LEN)
477 return;
478
479 /* and only beacons from the associated BSSID, please */
480 if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
481 return;
482
483 rtlpriv->psc.last_beacon = jiffies;
484
485 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
486 if (!tim)
487 return;
488
489 if (tim[1] < sizeof(*tim_ie))
490 return;
491
492 tim_len = tim[1];
493 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
494
495 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
496 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
497
498 /* Check whenever the PHY can be turned off again. */
499
500 /* 1. What about buffered unicast traffic for our AID? */
501 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
502 rtlpriv->mac80211.assoc_id);
503
504 /* 2. Maybe the AP wants to send multicast/broadcast data? */
505 m_buffed = tim_ie->bitmap_ctrl & 0x01;
506 rtlpriv->psc.multi_buffered = m_buffed;
507
508 /* unicast will process by mac80211 through
509 * set ~IEEE80211_CONF_PS, So we just check
510 * multicast frames here */
511 if (!m_buffed) {
512 /* back to low-power land. and delay is
513 * prevent null power save frame tx fail */
514 queue_delayed_work(rtlpriv->works.rtl_wq,
515 &rtlpriv->works.ps_work, MSECS(5));
516 } else {
517 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
518 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
519 }
520 }
521
rtl_swlps_rf_awake(struct ieee80211_hw * hw)522 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
523 {
524 struct rtl_priv *rtlpriv = rtl_priv(hw);
525 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
526 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
527
528 if (!rtlpriv->psc.swctrl_lps)
529 return;
530 if (mac->link_state != MAC80211_LINKED)
531 return;
532
533 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
534 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
535 rtlpriv->intf_ops->disable_aspm(hw);
536 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
537 }
538
539 mutex_lock(&rtlpriv->locks.ps_mutex);
540 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
541 mutex_unlock(&rtlpriv->locks.ps_mutex);
542 }
543
rtl_swlps_rfon_wq_callback(void * data)544 void rtl_swlps_rfon_wq_callback(void *data)
545 {
546 struct rtl_works *rtlworks =
547 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
548 struct ieee80211_hw *hw = rtlworks->hw;
549
550 rtl_swlps_rf_awake(hw);
551 }
552
rtl_swlps_rf_sleep(struct ieee80211_hw * hw)553 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
554 {
555 struct rtl_priv *rtlpriv = rtl_priv(hw);
556 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
557 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
558 u8 sleep_intv;
559
560 if (!rtlpriv->psc.sw_ps_enabled)
561 return;
562
563 if ((rtlpriv->sec.being_setkey) ||
564 (mac->opmode == NL80211_IFTYPE_ADHOC))
565 return;
566
567 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
568 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
569 return;
570
571 if (rtlpriv->link_info.busytraffic)
572 return;
573
574 mutex_lock(&rtlpriv->locks.ps_mutex);
575 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
576 mutex_unlock(&rtlpriv->locks.ps_mutex);
577
578 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
579 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
580 rtlpriv->intf_ops->enable_aspm(hw);
581 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
582 }
583
584 /* here is power save alg, when this beacon is DTIM
585 * we will set sleep time to dtim_period * n;
586 * when this beacon is not DTIM, we will set sleep
587 * time to sleep_intv = rtlpriv->psc.dtim_counter or
588 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
589
590 if (rtlpriv->psc.dtim_counter == 0) {
591 if (hw->conf.ps_dtim_period == 1)
592 sleep_intv = hw->conf.ps_dtim_period * 2;
593 else
594 sleep_intv = hw->conf.ps_dtim_period;
595 } else {
596 sleep_intv = rtlpriv->psc.dtim_counter;
597 }
598
599 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
600 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
601
602 /* this print should always be dtim_conter = 0 &
603 * sleep = dtim_period, that meaons, we should
604 * awake before every dtim */
605 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
606 "dtim_counter:%x will sleep :%d beacon_intv\n",
607 rtlpriv->psc.dtim_counter, sleep_intv);
608
609 /* we tested that 40ms is enough for sw & hw sw delay */
610 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
611 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
612 }
613
614
rtl_swlps_wq_callback(void * data)615 void rtl_swlps_wq_callback(void *data)
616 {
617 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
618 struct rtl_works,
619 ps_work);
620 struct ieee80211_hw *hw = rtlworks->hw;
621 struct rtl_priv *rtlpriv = rtl_priv(hw);
622 bool ps = false;
623
624 ps = (hw->conf.flags & IEEE80211_CONF_PS);
625
626 /* we can sleep after ps null send ok */
627 if (rtlpriv->psc.state_inap) {
628 rtl_swlps_rf_sleep(hw);
629
630 if (rtlpriv->psc.state && !ps) {
631 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
632 rtlpriv->psc.last_action);
633 }
634
635 if (ps)
636 rtlpriv->psc.last_slept = jiffies;
637
638 rtlpriv->psc.last_action = jiffies;
639 rtlpriv->psc.state = ps;
640 }
641 }
642
rtl_p2p_noa_ie(struct ieee80211_hw * hw,void * data,unsigned int len)643 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
644 unsigned int len)
645 {
646 struct rtl_priv *rtlpriv = rtl_priv(hw);
647 struct ieee80211_mgmt *mgmt = (void *)data;
648 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
649 u8 *pos, *end, *ie;
650 u16 noa_len;
651 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
652 u8 noa_num, index, i, noa_index = 0;
653 bool find_p2p_ie = false , find_p2p_ps_ie = false;
654 pos = (u8 *)mgmt->u.beacon.variable;
655 end = data + len;
656 ie = NULL;
657
658 while (pos + 1 < end) {
659 if (pos + 2 + pos[1] > end)
660 return;
661
662 if (pos[0] == 221 && pos[1] > 4) {
663 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
664 ie = pos + 2+4;
665 break;
666 }
667 }
668 pos += 2 + pos[1];
669 }
670
671 if (ie == NULL)
672 return;
673 find_p2p_ie = true;
674 /*to find noa ie*/
675 while (ie + 1 < end) {
676 noa_len = READEF2BYTE(&ie[1]);
677 if (ie + 3 + ie[1] > end)
678 return;
679
680 if (ie[0] == 12) {
681 find_p2p_ps_ie = true;
682 if ((noa_len - 2) % 13 != 0) {
683 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
684 "P2P notice of absence: invalid length.%d\n",
685 noa_len);
686 return;
687 } else {
688 noa_num = (noa_len - 2) / 13;
689 }
690 noa_index = ie[3];
691 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
692 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
693 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
694 "update NOA ie.\n");
695 p2pinfo->noa_index = noa_index;
696 p2pinfo->opp_ps = (ie[4] >> 7);
697 p2pinfo->ctwindow = ie[4] & 0x7F;
698 p2pinfo->noa_num = noa_num;
699 index = 5;
700 for (i = 0; i < noa_num; i++) {
701 p2pinfo->noa_count_type[i] =
702 READEF1BYTE(ie+index);
703 index += 1;
704 p2pinfo->noa_duration[i] =
705 READEF4BYTE(ie+index);
706 index += 4;
707 p2pinfo->noa_interval[i] =
708 READEF4BYTE(ie+index);
709 index += 4;
710 p2pinfo->noa_start_time[i] =
711 READEF4BYTE(ie+index);
712 index += 4;
713 }
714
715 if (p2pinfo->opp_ps == 1) {
716 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
717 /* Driver should wait LPS entering
718 * CTWindow
719 */
720 if (rtlpriv->psc.fw_current_inpsmode)
721 rtl_p2p_ps_cmd(hw,
722 P2P_PS_ENABLE);
723 } else if (p2pinfo->noa_num > 0) {
724 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
725 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
726 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
727 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
728 }
729 }
730 break;
731 }
732 ie += 3 + noa_len;
733 }
734
735 if (find_p2p_ie == true) {
736 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
737 (find_p2p_ps_ie == false))
738 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
739 }
740 }
741
rtl_p2p_action_ie(struct ieee80211_hw * hw,void * data,unsigned int len)742 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
743 unsigned int len)
744 {
745 struct rtl_priv *rtlpriv = rtl_priv(hw);
746 struct ieee80211_mgmt *mgmt = (void *)data;
747 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
748 u8 noa_num, index, i, noa_index = 0;
749 u8 *pos, *end, *ie;
750 u16 noa_len;
751 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
752
753 pos = (u8 *)&mgmt->u.action.category;
754 end = data + len;
755 ie = NULL;
756
757 if (pos[0] == 0x7f) {
758 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
759 ie = pos + 3+4;
760 }
761
762 if (ie == NULL)
763 return;
764
765 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
766 /*to find noa ie*/
767 while (ie + 1 < end) {
768 noa_len = READEF2BYTE(&ie[1]);
769 if (ie + 3 + ie[1] > end)
770 return;
771
772 if (ie[0] == 12) {
773 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
774 RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
775 ie, noa_len);
776 if ((noa_len - 2) % 13 != 0) {
777 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
778 "P2P notice of absence: invalid length.%d\n",
779 noa_len);
780 return;
781 } else {
782 noa_num = (noa_len - 2) / 13;
783 }
784 noa_index = ie[3];
785 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
786 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
787 p2pinfo->noa_index = noa_index;
788 p2pinfo->opp_ps = (ie[4] >> 7);
789 p2pinfo->ctwindow = ie[4] & 0x7F;
790 p2pinfo->noa_num = noa_num;
791 index = 5;
792 for (i = 0; i < noa_num; i++) {
793 p2pinfo->noa_count_type[i] =
794 READEF1BYTE(ie+index);
795 index += 1;
796 p2pinfo->noa_duration[i] =
797 READEF4BYTE(ie+index);
798 index += 4;
799 p2pinfo->noa_interval[i] =
800 READEF4BYTE(ie+index);
801 index += 4;
802 p2pinfo->noa_start_time[i] =
803 READEF4BYTE(ie+index);
804 index += 4;
805 }
806
807 if (p2pinfo->opp_ps == 1) {
808 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
809 /* Driver should wait LPS entering
810 * CTWindow
811 */
812 if (rtlpriv->psc.fw_current_inpsmode)
813 rtl_p2p_ps_cmd(hw,
814 P2P_PS_ENABLE);
815 } else if (p2pinfo->noa_num > 0) {
816 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
817 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
818 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
819 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
820 }
821 }
822 break;
823 }
824 ie += 3 + noa_len;
825 }
826 }
827
rtl_p2p_ps_cmd(struct ieee80211_hw * hw,u8 p2p_ps_state)828 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw, u8 p2p_ps_state)
829 {
830 struct rtl_priv *rtlpriv = rtl_priv(hw);
831 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
832 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
833
834 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n", p2p_ps_state);
835 switch (p2p_ps_state) {
836 case P2P_PS_DISABLE:
837 p2pinfo->p2p_ps_state = p2p_ps_state;
838 rtlpriv->cfg->ops->set_hw_reg(hw,
839 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
840 (u8 *)(&p2p_ps_state));
841
842 p2pinfo->noa_index = 0;
843 p2pinfo->ctwindow = 0;
844 p2pinfo->opp_ps = 0;
845 p2pinfo->noa_num = 0;
846 p2pinfo->p2p_ps_mode = P2P_PS_NONE;
847 if (rtlps->fw_current_inpsmode == true) {
848 if (rtlps->smart_ps == 0) {
849 rtlps->smart_ps = 2;
850 rtlpriv->cfg->ops->set_hw_reg(hw,
851 HW_VAR_H2C_FW_PWRMODE,
852 (u8 *)(&rtlps->pwr_mode));
853 }
854 }
855 break;
856 case P2P_PS_ENABLE:
857 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
858 p2pinfo->p2p_ps_state = p2p_ps_state;
859
860 if (p2pinfo->ctwindow > 0) {
861 if (rtlps->smart_ps != 0) {
862 rtlps->smart_ps = 0;
863 rtlpriv->cfg->ops->set_hw_reg(hw,
864 HW_VAR_H2C_FW_PWRMODE,
865 (u8 *)(&rtlps->pwr_mode));
866 }
867 }
868 rtlpriv->cfg->ops->set_hw_reg(hw,
869 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
870 (u8 *)(&p2p_ps_state));
871 }
872 break;
873 case P2P_PS_SCAN:
874 case P2P_PS_SCAN_DONE:
875 case P2P_PS_ALLSTASLEEP:
876 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
877 p2pinfo->p2p_ps_state = p2p_ps_state;
878 rtlpriv->cfg->ops->set_hw_reg(hw,
879 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
880 (u8 *)(&p2p_ps_state));
881 }
882 break;
883 default:
884 break;
885 }
886 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
887 "ctwindow %x oppps %x\n", p2pinfo->ctwindow, p2pinfo->opp_ps);
888 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
889 "count %x duration %x index %x interval %x start time %x noa num %x\n",
890 p2pinfo->noa_count_type[0], p2pinfo->noa_duration[0],
891 p2pinfo->noa_index, p2pinfo->noa_interval[0],
892 p2pinfo->noa_start_time[0], p2pinfo->noa_num);
893 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
894 }
895
rtl_p2p_info(struct ieee80211_hw * hw,void * data,unsigned int len)896 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
897 {
898 struct rtl_priv *rtlpriv = rtl_priv(hw);
899 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
900 struct ieee80211_hdr *hdr = (void *)data;
901
902 if (!mac->p2p)
903 return;
904 if (mac->link_state != MAC80211_LINKED)
905 return;
906 /* min. beacon length + FCS_LEN */
907 if (len <= 40 + FCS_LEN)
908 return;
909
910 /* and only beacons from the associated BSSID, please */
911 if (compare_ether_addr(hdr->addr3, rtlpriv->mac80211.bssid))
912 return;
913
914 /* check if this really is a beacon */
915 if (!(ieee80211_is_beacon(hdr->frame_control) ||
916 ieee80211_is_probe_resp(hdr->frame_control) ||
917 ieee80211_is_action(hdr->frame_control)))
918 return;
919
920 if (ieee80211_is_action(hdr->frame_control))
921 rtl_p2p_action_ie(hw, data, len - FCS_LEN);
922 else
923 rtl_p2p_noa_ie(hw, data, len - FCS_LEN);
924 }
925