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Linux 4.16.11
[linux/fpc-iii.git] / drivers / staging / rtlwifi / ps.c
blob7856fc5d10bdedce75eb68804b4f29fac27d350a
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
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 /*<2.1> Switch Channel & Bandwidth to last rtl_op_config setting*/
55 rtlpriv->cfg->ops->switch_channel(hw);
56 rtlpriv->cfg->ops->set_channel_access(hw);
57 rtlpriv->cfg->ops->set_bw_mode(hw,
58 cfg80211_get_chandef_type(&hw->conf.chandef));
59
60 /*<3> Enable Interrupt */
61 rtlpriv->cfg->ops->enable_interrupt(hw);
62
63 /*<enable timer> */
64 rtl_watch_dog_timer_callback(&rtlpriv->works.watchdog_timer);
65
66 return true;
67 }
68
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);
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
86 static bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
87 enum rf_pwrstate state_toset,
88 u32 changesource)
89 {
90 struct rtl_priv *rtlpriv = rtl_priv(hw);
91 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
92 enum rf_pwrstate rtstate;
93 bool actionallowed = false;
94 u16 rfwait_cnt = 0;
95
96 /*Only one thread can change
97 *the RF state at one time, and others
98 *should wait to be executed.
99 */
100 while (true) {
101 spin_lock(&rtlpriv->locks.rf_ps_lock);
102 if (ppsc->rfchange_inprogress) {
103 spin_unlock(&rtlpriv->locks.rf_ps_lock);
104
105 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
106 "RF Change in progress! Wait to set..state_toset(%d).\n",
107 state_toset);
108
109 /* Set RF after the previous action is done. */
110 while (ppsc->rfchange_inprogress) {
111 rfwait_cnt++;
112 mdelay(1);
113 /*Wait too long, return false to avoid
114 *to be stuck here.
115 */
116 if (rfwait_cnt > 100)
117 return false;
118 }
119 } else {
120 ppsc->rfchange_inprogress = true;
121 spin_unlock(&rtlpriv->locks.rf_ps_lock);
122 break;
123 }
124 }
125
126 rtstate = ppsc->rfpwr_state;
127
128 switch (state_toset) {
129 case ERFON:
130 ppsc->rfoff_reason &= (~changesource);
131
132 if ((changesource == RF_CHANGE_BY_HW) &&
133 (ppsc->hwradiooff)) {
134 ppsc->hwradiooff = false;
135 }
136
137 if (!ppsc->rfoff_reason) {
138 ppsc->rfoff_reason = 0;
139 actionallowed = true;
140 }
141 break;
142 case ERFOFF:
143 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff)
144 ppsc->hwradiooff = true;
145
146 ppsc->rfoff_reason |= changesource;
147 actionallowed = true;
148 break;
149 case ERFSLEEP:
150 ppsc->rfoff_reason |= changesource;
151 actionallowed = true;
152 break;
153 default:
154 pr_err("switch case %#x not processed\n", state_toset);
155 break;
156 }
157
158 if (actionallowed)
159 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
160
161 spin_lock(&rtlpriv->locks.rf_ps_lock);
162 ppsc->rfchange_inprogress = false;
163 spin_unlock(&rtlpriv->locks.rf_ps_lock);
164
165 return actionallowed;
166 }
167
168 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
169 {
170 struct rtl_priv *rtlpriv = rtl_priv(hw);
171 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
172 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
173
174 ppsc->swrf_processing = true;
175
176 if (ppsc->inactive_pwrstate == ERFON &&
177 rtlhal->interface == INTF_PCI) {
178 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
179 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
180 rtlhal->interface == INTF_PCI) {
181 rtlpriv->intf_ops->disable_aspm(hw);
182 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
183 }
184 }
185
186 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
187 RF_CHANGE_BY_IPS);
188
189 if (ppsc->inactive_pwrstate == ERFOFF &&
190 rtlhal->interface == INTF_PCI) {
191 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
192 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
193 rtlpriv->intf_ops->enable_aspm(hw);
194 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
195 }
196 }
197
198 ppsc->swrf_processing = false;
199 }
200
201 void rtl_ips_nic_off_wq_callback(void *data)
202 {
203 struct rtl_works *rtlworks =
204 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
205 struct ieee80211_hw *hw = rtlworks->hw;
206 struct rtl_priv *rtlpriv = rtl_priv(hw);
207 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
208 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
209 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
210 enum rf_pwrstate rtstate;
211
212 if (mac->opmode != NL80211_IFTYPE_STATION) {
213 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
214 "not station return\n");
215 return;
216 }
217
218 if (mac->p2p_in_use)
219 return;
220
221 if (mac->link_state > MAC80211_NOLINK)
222 return;
223
224 if (is_hal_stop(rtlhal))
225 return;
226
227 if (rtlpriv->sec.being_setkey)
228 return;
229
230 if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
231 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
232
233 if (ppsc->inactiveps) {
234 rtstate = ppsc->rfpwr_state;
235
236 /*
237 *Do not enter IPS in the following conditions:
238 *(1) RF is already OFF or Sleep
239 *(2) swrf_processing (indicates the IPS is still under going)
240 *(3) Connectted (only disconnected can trigger IPS)
241 *(4) IBSS (send Beacon)
242 *(5) AP mode (send Beacon)
243 *(6) monitor mode (rcv packet)
244 */
245
246 if (rtstate == ERFON &&
247 !ppsc->swrf_processing &&
248 (mac->link_state == MAC80211_NOLINK) &&
249 !mac->act_scanning) {
250 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
251 "IPSEnter(): Turn off RF\n");
252
253 ppsc->inactive_pwrstate = ERFOFF;
254 ppsc->in_powersavemode = true;
255
256 /* call before RF off */
257 if (rtlpriv->cfg->ops->get_btc_status())
258 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
259 ppsc->inactive_pwrstate);
260
261 /*rtl_pci_reset_trx_ring(hw); */
262 _rtl_ps_inactive_ps(hw);
263 }
264 }
265 }
266
267 void rtl_ips_nic_off(struct ieee80211_hw *hw)
268 {
269 struct rtl_priv *rtlpriv = rtl_priv(hw);
270
271 /* because when link with ap, mac80211 will ask us
272 * to disable nic quickly after scan before linking,
273 * this will cause link failed, so we delay 100ms here
274 */
275 queue_delayed_work(rtlpriv->works.rtl_wq,
276 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
277 }
278
279 /* NOTICE: any opmode should exc nic_on, or disable without
280 * nic_on may something wrong, like adhoc TP
281 */
282 void rtl_ips_nic_on(struct ieee80211_hw *hw)
283 {
284 struct rtl_priv *rtlpriv = rtl_priv(hw);
285 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
286 enum rf_pwrstate rtstate;
287
288 cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
289
290 mutex_lock(&rtlpriv->locks.ips_mutex);
291 if (ppsc->inactiveps) {
292 rtstate = ppsc->rfpwr_state;
293
294 if (rtstate != ERFON &&
295 !ppsc->swrf_processing &&
296 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
297 ppsc->inactive_pwrstate = ERFON;
298 ppsc->in_powersavemode = false;
299 _rtl_ps_inactive_ps(hw);
300 /* call after RF on */
301 if (rtlpriv->phydm.ops)
302 rtlpriv->phydm.ops->phydm_reset_dm(rtlpriv);
303 if (rtlpriv->cfg->ops->get_btc_status())
304 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
305 ppsc->inactive_pwrstate);
306 }
307 }
308 mutex_unlock(&rtlpriv->locks.ips_mutex);
309 }
310
311 /*for FW LPS*/
312
313 /*
314 *Determine if we can set Fw into PS mode
315 *in current condition.Return TRUE if it
316 *can enter PS mode.
317 */
318 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
319 {
320 struct rtl_priv *rtlpriv = rtl_priv(hw);
321 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
322 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
323 u32 ps_timediff;
324
325 ps_timediff = jiffies_to_msecs(jiffies -
326 ppsc->last_delaylps_stamp_jiffies);
327
328 if (ps_timediff < 2000) {
329 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
330 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
331 return false;
332 }
333
334 if (mac->link_state != MAC80211_LINKED)
335 return false;
336
337 if (mac->opmode == NL80211_IFTYPE_ADHOC)
338 return false;
339
340 return true;
341 }
342
343 /* Change current and default preamble mode.*/
344 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
345 {
346 struct rtl_priv *rtlpriv = rtl_priv(hw);
347 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
348 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
349 bool enter_fwlps;
350
351 if (mac->opmode == NL80211_IFTYPE_ADHOC)
352 return;
353
354 if (mac->link_state != MAC80211_LINKED)
355 return;
356
357 if (ppsc->dot11_psmode == rt_psmode && rt_psmode == EACTIVE)
358 return;
359
360 /* Update power save mode configured. */
361 ppsc->dot11_psmode = rt_psmode;
362
363 /*
364 *<FW control LPS>
365 *1. Enter PS mode
366 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
367 * cmd to set Fw into PS mode.
368 *2. Leave PS mode
369 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
370 * mode and set RPWM to turn RF on.
371 */
372
373 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
374 if (ppsc->dot11_psmode == EACTIVE) {
375 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
376 "FW LPS leave ps_mode:%x\n",
377 FW_PS_ACTIVE_MODE);
378 enter_fwlps = false;
379 ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
380 ppsc->smart_ps = 0;
381 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
382 (u8 *)(&enter_fwlps));
383 if (ppsc->p2p_ps_info.opp_ps)
384 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
385
386 if (rtlpriv->cfg->ops->get_btc_status())
387 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
388 } else {
389 if (rtl_get_fwlps_doze(hw)) {
390 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
391 "FW LPS enter ps_mode:%x\n",
392 ppsc->fwctrl_psmode);
393 if (rtlpriv->cfg->ops->get_btc_status())
394 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
395 enter_fwlps = true;
396 ppsc->pwr_mode = ppsc->fwctrl_psmode;
397 ppsc->smart_ps = 2;
398 rtlpriv->cfg->ops->set_hw_reg(hw,
399 HW_VAR_FW_LPS_ACTION,
400 (u8 *)(&enter_fwlps));
401
402 } else {
403 /* Reset the power save related parameters. */
404 ppsc->dot11_psmode = EACTIVE;
405 }
406 }
407 }
408 }
409
410 /* Interrupt safe routine to enter the leisure power save mode.*/
411 static void rtl_lps_enter_core(struct ieee80211_hw *hw)
412 {
413 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
414 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
415 struct rtl_priv *rtlpriv = rtl_priv(hw);
416
417 if (!ppsc->fwctrl_lps)
418 return;
419
420 if (rtlpriv->sec.being_setkey)
421 return;
422
423 if (rtlpriv->link_info.busytraffic)
424 return;
425
426 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
427 if (mac->cnt_after_linked < 5)
428 return;
429
430 if (mac->opmode == NL80211_IFTYPE_ADHOC)
431 return;
432
433 if (mac->link_state != MAC80211_LINKED)
434 return;
435
436 mutex_lock(&rtlpriv->locks.lps_mutex);
437
438 /* Don't need to check (ppsc->dot11_psmode == EACTIVE), because
439 * bt_ccoexist may ask to enter lps.
440 * In normal case, this constraint move to rtl_lps_set_psmode().
441 */
442 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
443 "Enter 802.11 power save mode...\n");
444 rtl_lps_set_psmode(hw, EAUTOPS);
445
446 mutex_unlock(&rtlpriv->locks.lps_mutex);
447 }
448
449 /* Interrupt safe routine to leave the leisure power save mode.*/
450 static void rtl_lps_leave_core(struct ieee80211_hw *hw)
451 {
452 struct rtl_priv *rtlpriv = rtl_priv(hw);
453 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
454 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
455
456 mutex_lock(&rtlpriv->locks.lps_mutex);
457
458 if (ppsc->fwctrl_lps) {
459 if (ppsc->dot11_psmode != EACTIVE) {
460 /*FIX ME */
461 /*rtlpriv->cfg->ops->enable_interrupt(hw); */
462
463 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
464 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
465 rtlhal->interface == INTF_PCI) {
466 rtlpriv->intf_ops->disable_aspm(hw);
467 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
468 }
469
470 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
471 "Busy Traffic,Leave 802.11 power save..\n");
472
473 rtl_lps_set_psmode(hw, EACTIVE);
474 }
475 }
476 mutex_unlock(&rtlpriv->locks.lps_mutex);
477 }
478
479 /* For sw LPS*/
480 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
481 {
482 struct rtl_priv *rtlpriv = rtl_priv(hw);
483 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
484 struct ieee80211_hdr *hdr = data;
485 struct ieee80211_tim_ie *tim_ie;
486 u8 *tim;
487 u8 tim_len;
488 bool u_buffed;
489 bool m_buffed;
490
491 if (mac->opmode != NL80211_IFTYPE_STATION)
492 return;
493
494 if (!rtlpriv->psc.swctrl_lps)
495 return;
496
497 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
498 return;
499
500 if (!rtlpriv->psc.sw_ps_enabled)
501 return;
502
503 if (rtlpriv->psc.fwctrl_lps)
504 return;
505
506 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
507 return;
508
509 /* check if this really is a beacon */
510 if (!ieee80211_is_beacon(hdr->frame_control))
511 return;
512
513 /* min. beacon length + FCS_LEN */
514 if (len <= 40 + FCS_LEN)
515 return;
516
517 /* and only beacons from the associated BSSID, please */
518 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
519 return;
520
521 rtlpriv->psc.last_beacon = jiffies;
522
523 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
524 if (!tim)
525 return;
526
527 if (tim[1] < sizeof(*tim_ie))
528 return;
529
530 tim_len = tim[1];
531 tim_ie = (struct ieee80211_tim_ie *)&tim[2];
532
533 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
534 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
535
536 /* Check whenever the PHY can be turned off again. */
537
538 /* 1. What about buffered unicast traffic for our AID? */
539 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
540 rtlpriv->mac80211.assoc_id);
541
542 /* 2. Maybe the AP wants to send multicast/broadcast data? */
543 m_buffed = tim_ie->bitmap_ctrl & 0x01;
544 rtlpriv->psc.multi_buffered = m_buffed;
545
546 /* unicast will process by mac80211 through
547 * set ~IEEE80211_CONF_PS, So we just check
548 * multicast frames here
549 */
550 if (!m_buffed) {
551 /* back to low-power land. and delay is
552 * prevent null power save frame tx fail
553 */
554 queue_delayed_work(rtlpriv->works.rtl_wq,
555 &rtlpriv->works.ps_work, MSECS(5));
556 } else {
557 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
558 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
559 }
560 }
561
562 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
563 {
564 struct rtl_priv *rtlpriv = rtl_priv(hw);
565 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
566 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
567
568 if (!rtlpriv->psc.swctrl_lps)
569 return;
570 if (mac->link_state != MAC80211_LINKED)
571 return;
572
573 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
574 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
575 rtlpriv->intf_ops->disable_aspm(hw);
576 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
577 }
578
579 mutex_lock(&rtlpriv->locks.lps_mutex);
580 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
581 mutex_unlock(&rtlpriv->locks.lps_mutex);
582 }
583
584 void rtl_swlps_rfon_wq_callback(void *data)
585 {
586 struct rtl_works *rtlworks =
587 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
588 struct ieee80211_hw *hw = rtlworks->hw;
589
590 rtl_swlps_rf_awake(hw);
591 }
592
593 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
594 {
595 struct rtl_priv *rtlpriv = rtl_priv(hw);
596 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
597 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
598 u8 sleep_intv;
599
600 if (!rtlpriv->psc.sw_ps_enabled)
601 return;
602
603 if ((rtlpriv->sec.being_setkey) ||
604 (mac->opmode == NL80211_IFTYPE_ADHOC))
605 return;
606
607 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
608 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
609 return;
610
611 if (rtlpriv->link_info.busytraffic)
612 return;
613
614 spin_lock(&rtlpriv->locks.rf_ps_lock);
615 if (rtlpriv->psc.rfchange_inprogress) {
616 spin_unlock(&rtlpriv->locks.rf_ps_lock);
617 return;
618 }
619 spin_unlock(&rtlpriv->locks.rf_ps_lock);
620
621 mutex_lock(&rtlpriv->locks.lps_mutex);
622 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
623 mutex_unlock(&rtlpriv->locks.lps_mutex);
624
625 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
626 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
627 rtlpriv->intf_ops->enable_aspm(hw);
628 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
629 }
630
631 /* here is power save alg, when this beacon is DTIM
632 * we will set sleep time to dtim_period * n;
633 * when this beacon is not DTIM, we will set sleep
634 * time to sleep_intv = rtlpriv->psc.dtim_counter or
635 * MAX_SW_LPS_SLEEP_INTV(default set to 5)
636 */
637
638 if (rtlpriv->psc.dtim_counter == 0) {
639 if (hw->conf.ps_dtim_period == 1)
640 sleep_intv = hw->conf.ps_dtim_period * 2;
641 else
642 sleep_intv = hw->conf.ps_dtim_period;
643 } else {
644 sleep_intv = rtlpriv->psc.dtim_counter;
645 }
646
647 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
648 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
649
650 /* this print should always be dtim_conter = 0 &
651 * sleep = dtim_period, that meaons, we should
652 * awake before every dtim
653 */
654 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
655 "dtim_counter:%x will sleep :%d beacon_intv\n",
656 rtlpriv->psc.dtim_counter, sleep_intv);
657
658 /* we tested that 40ms is enough for sw & hw sw delay */
659 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
660 MSECS(sleep_intv *
661 mac->vif->bss_conf.beacon_int - 40));
662 }
663
664 void rtl_lps_change_work_callback(struct work_struct *work)
665 {
666 struct rtl_works *rtlworks =
667 container_of(work, struct rtl_works, lps_change_work);
668 struct ieee80211_hw *hw = rtlworks->hw;
669 struct rtl_priv *rtlpriv = rtl_priv(hw);
670
671 if (rtlpriv->enter_ps)
672 rtl_lps_enter_core(hw);
673 else
674 rtl_lps_leave_core(hw);
675 }
676
677 void rtl_lps_enter(struct ieee80211_hw *hw)
678 {
679 struct rtl_priv *rtlpriv = rtl_priv(hw);
680
681 if (!in_interrupt())
682 return rtl_lps_enter_core(hw);
683 rtlpriv->enter_ps = true;
684 schedule_work(&rtlpriv->works.lps_change_work);
685 }
686
687 void rtl_lps_leave(struct ieee80211_hw *hw)
688 {
689 struct rtl_priv *rtlpriv = rtl_priv(hw);
690
691 if (!in_interrupt())
692 return rtl_lps_leave_core(hw);
693 rtlpriv->enter_ps = false;
694 schedule_work(&rtlpriv->works.lps_change_work);
695 }
696
697 void rtl_swlps_wq_callback(void *data)
698 {
699 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
700 struct rtl_works,
701 ps_work);
702 struct ieee80211_hw *hw = rtlworks->hw;
703 struct rtl_priv *rtlpriv = rtl_priv(hw);
704 bool ps = false;
705
706 ps = (hw->conf.flags & IEEE80211_CONF_PS);
707
708 /* we can sleep after ps null send ok */
709 if (rtlpriv->psc.state_inap) {
710 rtl_swlps_rf_sleep(hw);
711
712 if (rtlpriv->psc.state && !ps) {
713 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
714 rtlpriv->psc.last_action);
715 }
716
717 if (ps)
718 rtlpriv->psc.last_slept = jiffies;
719
720 rtlpriv->psc.last_action = jiffies;
721 rtlpriv->psc.state = ps;
722 }
723 }
724
725 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
726 unsigned int len)
727 {
728 struct rtl_priv *rtlpriv = rtl_priv(hw);
729 struct ieee80211_mgmt *mgmt = data;
730 struct rtl_p2p_ps_info *p2pinfo = &rtlpriv->psc.p2p_ps_info;
731 u8 *pos, *end, *ie;
732 u16 noa_len;
733 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
734 u8 noa_num, index, i, noa_index = 0;
735 bool find_p2p_ie = false, find_p2p_ps_ie = false;
736
737 pos = (u8 *)mgmt->u.beacon.variable;
738 end = data + len;
739 ie = NULL;
740
741 while (pos + 1 < end) {
742 if (pos + 2 + pos[1] > end)
743 return;
744
745 if (pos[0] == 221 && pos[1] > 4) {
746 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
747 ie = pos + 2 + 4;
748 break;
749 }
750 }
751 pos += 2 + pos[1];
752 }
753
754 if (!ie)
755 return;
756 find_p2p_ie = true;
757 /*to find noa ie*/
758 while (ie + 1 < end) {
759 noa_len = READEF2BYTE((__le16 *)&ie[1]);
760 if (ie + 3 + ie[1] > end)
761 return;
762
763 if (ie[0] == 12) {
764 find_p2p_ps_ie = true;
765 if ((noa_len - 2) % 13 != 0) {
766 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
767 "P2P notice of absence: invalid length.%d\n",
768 noa_len);
769 return;
770 }
771 noa_num = (noa_len - 2) / 13;
772 noa_index = ie[3];
773 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
774 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
775 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
776 "update NOA ie.\n");
777 p2pinfo->noa_index = noa_index;
778 p2pinfo->opp_ps = (ie[4] >> 7);
779 p2pinfo->ctwindow = ie[4] & 0x7F;
780 p2pinfo->noa_num = noa_num;
781 index = 5;
782 for (i = 0; i < noa_num; i++) {
783 p2pinfo->noa_count_type[i] =
784 READEF1BYTE(ie + index);
785 index += 1;
786 p2pinfo->noa_duration[i] =
787 READEF4BYTE((__le32 *)ie + index);
788 index += 4;
789 p2pinfo->noa_interval[i] =
790 READEF4BYTE((__le32 *)ie + index);
791 index += 4;
792 p2pinfo->noa_start_time[i] =
793 READEF4BYTE((__le32 *)ie + index);
794 index += 4;
795 }
796
797 if (p2pinfo->opp_ps == 1) {
798 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
799 /* Driver should wait LPS entering
800 * CTWindow
801 */
802 if (rtlpriv->psc.fw_current_inpsmode)
803 rtl_p2p_ps_cmd(hw,
804 P2P_PS_ENABLE);
805 } else if (p2pinfo->noa_num > 0) {
806 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
807 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
808 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
809 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
810 }
811 }
812 break;
813 }
814 ie += 3 + noa_len;
815 }
816
817 if (find_p2p_ie) {
818 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
819 (!find_p2p_ps_ie))
820 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
821 }
822 }
823
824 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
825 unsigned int len)
826 {
827 struct rtl_priv *rtlpriv = rtl_priv(hw);
828 struct ieee80211_mgmt *mgmt = data;
829 struct rtl_p2p_ps_info *p2pinfo = &rtlpriv->psc.p2p_ps_info;
830 u8 noa_num, index, i, noa_index = 0;
831 u8 *pos, *end, *ie;
832 u16 noa_len;
833 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
834
835 pos = (u8 *)&mgmt->u.action.category;
836 end = data + len;
837 ie = NULL;
838
839 if (pos[0] == 0x7f) {
840 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
841 ie = pos + 3 + 4;
842 }
843
844 if (!ie)
845 return;
846
847 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
848 /*to find noa ie*/
849 while (ie + 1 < end) {
850 noa_len = READEF2BYTE((__le16 *)&ie[1]);
851 if (ie + 3 + ie[1] > end)
852 return;
853
854 if (ie[0] == 12) {
855 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
856 RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
857 ie, noa_len);
858 if ((noa_len - 2) % 13 != 0) {
859 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
860 "P2P notice of absence: invalid length.%d\n",
861 noa_len);
862 return;
863 }
864 noa_num = (noa_len - 2) / 13;
865 noa_index = ie[3];
866 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
867 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
868 p2pinfo->noa_index = noa_index;
869 p2pinfo->opp_ps = (ie[4] >> 7);
870 p2pinfo->ctwindow = ie[4] & 0x7F;
871 p2pinfo->noa_num = noa_num;
872 index = 5;
873 for (i = 0; i < noa_num; i++) {
874 p2pinfo->noa_count_type[i] =
875 READEF1BYTE(ie + index);
876 index += 1;
877 p2pinfo->noa_duration[i] =
878 READEF4BYTE((__le32 *)ie + index);
879 index += 4;
880 p2pinfo->noa_interval[i] =
881 READEF4BYTE((__le32 *)ie + index);
882 index += 4;
883 p2pinfo->noa_start_time[i] =
884 READEF4BYTE((__le32 *)ie + index);
885 index += 4;
886 }
887
888 if (p2pinfo->opp_ps == 1) {
889 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
890 /* Driver should wait LPS entering
891 * CTWindow
892 */
893 if (rtlpriv->psc.fw_current_inpsmode)
894 rtl_p2p_ps_cmd(hw,
895 P2P_PS_ENABLE);
896 } else if (p2pinfo->noa_num > 0) {
897 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
898 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
899 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
900 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
901 }
902 }
903 break;
904 }
905 ie += 3 + noa_len;
906 }
907 }
908
909 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw, u8 p2p_ps_state)
910 {
911 struct rtl_priv *rtlpriv = rtl_priv(hw);
912 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
913 struct rtl_p2p_ps_info *p2pinfo = &rtlpriv->psc.p2p_ps_info;
914
915 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "p2p state %x\n", p2p_ps_state);
916 switch (p2p_ps_state) {
917 case P2P_PS_DISABLE:
918 p2pinfo->p2p_ps_state = p2p_ps_state;
919 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
920 &p2p_ps_state);
921 p2pinfo->noa_index = 0;
922 p2pinfo->ctwindow = 0;
923 p2pinfo->opp_ps = 0;
924 p2pinfo->noa_num = 0;
925 p2pinfo->p2p_ps_mode = P2P_PS_NONE;
926 if (rtlps->fw_current_inpsmode) {
927 if (rtlps->smart_ps == 0) {
928 rtlps->smart_ps = 2;
929 rtlpriv->cfg->ops->set_hw_reg(hw,
930 HW_VAR_H2C_FW_PWRMODE,
931 &rtlps->pwr_mode);
932 }
933 }
934 break;
935 case P2P_PS_ENABLE:
936 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
937 p2pinfo->p2p_ps_state = p2p_ps_state;
938
939 if (p2pinfo->ctwindow > 0) {
940 if (rtlps->smart_ps != 0) {
941 rtlps->smart_ps = 0;
942 rtlpriv->cfg->ops->set_hw_reg(hw,
943 HW_VAR_H2C_FW_PWRMODE,
944 &rtlps->pwr_mode);
945 }
946 }
947 rtlpriv->cfg->ops->set_hw_reg(hw,
948 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
949 &p2p_ps_state);
950 }
951 break;
952 case P2P_PS_SCAN:
953 case P2P_PS_SCAN_DONE:
954 case P2P_PS_ALLSTASLEEP:
955 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
956 p2pinfo->p2p_ps_state = p2p_ps_state;
957 rtlpriv->cfg->ops->set_hw_reg(hw,
958 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
959 &p2p_ps_state);
960 }
961 break;
962 default:
963 break;
964 }
965 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
966 "ctwindow %x oppps %x\n",
967 p2pinfo->ctwindow, p2pinfo->opp_ps);
968 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
969 "count %x duration %x index %x interval %x start time %x noa num %x\n",
970 p2pinfo->noa_count_type[0],
971 p2pinfo->noa_duration[0],
972 p2pinfo->noa_index,
973 p2pinfo->noa_interval[0],
974 p2pinfo->noa_start_time[0],
975 p2pinfo->noa_num);
976 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
977 }
978
979 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
980 {
981 struct rtl_priv *rtlpriv = rtl_priv(hw);
982 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
983 struct ieee80211_hdr *hdr = data;
984
985 if (!mac->p2p)
986 return;
987 if (mac->link_state != MAC80211_LINKED)
988 return;
989 /* min. beacon length + FCS_LEN */
990 if (len <= 40 + FCS_LEN)
991 return;
992
993 /* and only beacons from the associated BSSID, please */
994 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
995 return;
996
997 /* check if this really is a beacon */
998 if (!(ieee80211_is_beacon(hdr->frame_control) ||
999 ieee80211_is_probe_resp(hdr->frame_control) ||
1000 ieee80211_is_action(hdr->frame_control)))
1001 return;
1002
1003 if (ieee80211_is_action(hdr->frame_control))
1004 rtl_p2p_action_ie(hw, data, len - FCS_LEN);
1005 else
1006 rtl_p2p_noa_ie(hw, data, len - FCS_LEN);
1007 }
Linux with added FPC-III support