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rtlwifi: Store loop index in local variable
[deliverable/linux.git] / drivers / net / wireless / rtlwifi / ps.c
CommitLineData
0c817338
LF		 1/******************************************************************************
2 *
3 * Copyright(c) 2009-2010 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 "wifi.h"
31#include "base.h"
32#include "ps.h"
33
34bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
35{
36 struct rtl_priv *rtlpriv = rtl_priv(hw);
37 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
38 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
0c817338
LF		 39
40 /*<1> reset trx ring */
41 if (rtlhal->interface == INTF_PCI)
42 rtlpriv->intf_ops->reset_trx_ring(hw);
43
44 if (is_hal_stop(rtlhal))
45 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
46 ("Driver is already down!\n"));
47
48 /*<2> Enable Adapter */
49 rtlpriv->cfg->ops->hw_init(hw);
50 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
0c817338
LF		 51
52 /*<3> Enable Interrupt */
53 rtlpriv->cfg->ops->enable_interrupt(hw);
54
55 /*<enable timer> */
56 rtl_watch_dog_timer_callback((unsigned long)hw);
57
cc7dc0c4 58 return true;
0c817338
LF		 59}
60EXPORT_SYMBOL(rtl_ps_enable_nic);
61
62bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
63{
0c817338
LF		 64 struct rtl_priv *rtlpriv = rtl_priv(hw);
65
66 /*<1> Stop all timer */
67 rtl_deinit_deferred_work(hw);
68
69 /*<2> Disable Interrupt */
70 rtlpriv->cfg->ops->disable_interrupt(hw);
71
72 /*<3> Disable Adapter */
73 rtlpriv->cfg->ops->hw_disable(hw);
74
32473284 75 return true;
0c817338
LF		 76}
77EXPORT_SYMBOL(rtl_ps_disable_nic);
78
79bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
80 enum rf_pwrstate state_toset,
81 u32 changesource, bool protect_or_not)
82{
83 struct rtl_priv *rtlpriv = rtl_priv(hw);
84 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
7ea47240 85 bool actionallowed = false;
0c817338
LF		 86 u16 rfwait_cnt = 0;
87 unsigned long flag;
88
89 /*protect_or_not = true; */
90
91 if (protect_or_not)
92 goto no_protect;
93
94 /*
95 *Only one thread can change
96 *the RF state at one time, and others
97 *should wait to be executed.
98 */
99 while (true) {
100 spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
101 if (ppsc->rfchange_inprogress) {
102 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock,
103 flag);
104
105 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
106 ("RF Change in progress!"
107 "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
115 /*
116 *Wait too long, return false to avoid
117 *to be stuck here.
118 */
119 if (rfwait_cnt > 100)
120 return false;
121 }
122 } else {
123 ppsc->rfchange_inprogress = true;
124 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock,
125 flag);
126 break;
127 }
128 }
129
130no_protect:
0c817338
LF		 131 switch (state_toset) {
132 case ERFON:
133 ppsc->rfoff_reason &= (~changesource);
134
135 if ((changesource == RF_CHANGE_BY_HW) &&
7ea47240
LF		 136 (ppsc->hwradiooff == true)) {
137 ppsc->hwradiooff = false;
0c817338
LF		 138 }
139
140 if (!ppsc->rfoff_reason) {
141 ppsc->rfoff_reason = 0;
7ea47240 142 actionallowed = true;
0c817338
LF		 143 }
144
145 break;
146
147 case ERFOFF:
148
149 if ((changesource == RF_CHANGE_BY_HW)
7ea47240
LF		 150 && (ppsc->hwradiooff == false)) {
151 ppsc->hwradiooff = true;
0c817338
LF		 152 }
153
154 ppsc->rfoff_reason |= changesource;
7ea47240 155 actionallowed = true;
0c817338
LF		 156 break;
157
158 case ERFSLEEP:
159 ppsc->rfoff_reason |= changesource;
7ea47240 160 actionallowed = true;
0c817338
LF		 161 break;
162
163 default:
164 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
165 ("switch case not process\n"));
166 break;
167 }
168
7ea47240 169 if (actionallowed)
0c817338
LF		 170 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
171
172 if (!protect_or_not) {
173 spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
174 ppsc->rfchange_inprogress = false;
175 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
176 }
177
7ea47240 178 return actionallowed;
0c817338
LF		 179}
180EXPORT_SYMBOL(rtl_ps_set_rf_state);
181
182static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
183{
184 struct rtl_priv *rtlpriv = rtl_priv(hw);
185 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
186 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
187
7ea47240 188 ppsc->swrf_processing = true;
0c817338 189
099fb8ab 190 if (ppsc->inactive_pwrstate == ERFON &&
cc7dc0c4 191 rtlhal->interface == INTF_PCI) {
0c817338 192 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
cc7dc0c4 193 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
0c817338
LF		 194 rtlhal->interface == INTF_PCI) {
195 rtlpriv->intf_ops->disable_aspm(hw);
cc7dc0c4 196 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
0c817338
LF		 197 }
198 }
199
200 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
201 RF_CHANGE_BY_IPS, false);
202
203 if (ppsc->inactive_pwrstate == ERFOFF &&
204 rtlhal->interface == INTF_PCI) {
cc7dc0c4
C		 205 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
206 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
0c817338 207 rtlpriv->intf_ops->enable_aspm(hw);
cc7dc0c4 208 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
0c817338
LF		 209 }
210 }
211
7ea47240 212 ppsc->swrf_processing = false;
0c817338
LF		 213}
214
215void rtl_ips_nic_off_wq_callback(void *data)
216{
217 struct rtl_works *rtlworks =
218 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
219 struct ieee80211_hw *hw = rtlworks->hw;
220 struct rtl_priv *rtlpriv = rtl_priv(hw);
221 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
222 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
223 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
224 enum rf_pwrstate rtstate;
225
226 if (mac->opmode != NL80211_IFTYPE_STATION) {
227 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
228 ("not station return\n"));
229 return;
230 }
231
cc7dc0c4
C		 232 if (mac->link_state > MAC80211_NOLINK)
233 return;
234
0c817338
LF		 235 if (is_hal_stop(rtlhal))
236 return;
237
238 if (rtlpriv->sec.being_setkey)
239 return;
240
7ea47240 241 if (ppsc->inactiveps) {
0c817338
LF		 242 rtstate = ppsc->rfpwr_state;
243
244 /*
245 *Do not enter IPS in the following conditions:
246 *(1) RF is already OFF or Sleep
7ea47240 247 *(2) swrf_processing (indicates the IPS is still under going)
0c817338
LF		 248 *(3) Connectted (only disconnected can trigger IPS)
249 *(4) IBSS (send Beacon)
250 *(5) AP mode (send Beacon)
251 *(6) monitor mode (rcv packet)
252 */
253
254 if (rtstate == ERFON &&
7ea47240 255 !ppsc->swrf_processing &&
0c817338
LF		 256 (mac->link_state == MAC80211_NOLINK) &&
257 !mac->act_scanning) {
258 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
259 ("IPSEnter(): Turn off RF.\n"));
260
261 ppsc->inactive_pwrstate = ERFOFF;
7ea47240 262 ppsc->in_powersavemode = true;
0c817338
LF		 263
264 /*rtl_pci_reset_trx_ring(hw); */
265 _rtl_ps_inactive_ps(hw);
266 }
267 }
268}
269
270void rtl_ips_nic_off(struct ieee80211_hw *hw)
271{
272 struct rtl_priv *rtlpriv = rtl_priv(hw);
273
274 /*
275 *because when link with ap, mac80211 will ask us
276 *to disable nic quickly after scan before linking,
277 *this will cause link failed, so we delay 100ms here
278 */
279 queue_delayed_work(rtlpriv->works.rtl_wq,
280 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
281}
282
283void rtl_ips_nic_on(struct ieee80211_hw *hw)
284{
285 struct rtl_priv *rtlpriv = rtl_priv(hw);
cc7dc0c4 286 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
0c817338
LF		 287 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
288 enum rf_pwrstate rtstate;
d704300f 289 unsigned long flags;
0c817338 290
cc7dc0c4
C		 291 if (mac->opmode != NL80211_IFTYPE_STATION)
292 return;
293
d704300f 294 spin_lock_irqsave(&rtlpriv->locks.ips_lock, flags);
0c817338 295
7ea47240 296 if (ppsc->inactiveps) {
0c817338
LF		 297 rtstate = ppsc->rfpwr_state;
298
299 if (rtstate != ERFON &&
7ea47240 300 !ppsc->swrf_processing &&
0c817338
LF		 301 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
302
303 ppsc->inactive_pwrstate = ERFON;
7ea47240 304 ppsc->in_powersavemode = false;
0c817338
LF		 305
306 _rtl_ps_inactive_ps(hw);
307 }
308 }
309
d704300f 310 spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
0c817338
LF		 311}
312
313/*for FW LPS*/
314
315/*
316 *Determine if we can set Fw into PS mode
317 *in current condition.Return TRUE if it
318 *can enter PS mode.
319 */
320static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
321{
322 struct rtl_priv *rtlpriv = rtl_priv(hw);
323 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
324 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
325 u32 ps_timediff;
326
327 ps_timediff = jiffies_to_msecs(jiffies -
328 ppsc->last_delaylps_stamp_jiffies);
329
330 if (ps_timediff < 2000) {
331 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
332 ("Delay enter Fw LPS for DHCP, ARP,"
333 " or EAPOL exchanging state.\n"));
334 return false;
335 }
336
337 if (mac->link_state != MAC80211_LINKED)
338 return false;
339
340 if (mac->opmode == NL80211_IFTYPE_ADHOC)
341 return false;
342
343 return true;
344}
345
346/* Change current and default preamble mode.*/
347static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
348{
349 struct rtl_priv *rtlpriv = rtl_priv(hw);
350 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
351 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
352 u8 rpwm_val, fw_pwrmode;
353
354 if (mac->opmode == NL80211_IFTYPE_ADHOC)
355 return;
356
357 if (mac->link_state != MAC80211_LINKED)
358 return;
359
360 if (ppsc->dot11_psmode == rt_psmode)
361 return;
362
363 /* Update power save mode configured. */
364 ppsc->dot11_psmode = rt_psmode;
365
366 /*
367 *<FW control LPS>
368 *1. Enter PS mode
369 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
370 * cmd to set Fw into PS mode.
371 *2. Leave PS mode
372 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
373 * mode and set RPWM to turn RF on.
374 */
375
cc7dc0c4 376 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
7ea47240 377 bool fw_current_inps;
0c817338
LF		 378 if (ppsc->dot11_psmode == EACTIVE) {
379 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
380 ("FW LPS leave ps_mode:%x\n",
381 FW_PS_ACTIVE_MODE));
382
383 rpwm_val = 0x0C; /* RF on */
384 fw_pwrmode = FW_PS_ACTIVE_MODE;
385 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
386 (u8 *) (&rpwm_val));
387 rtlpriv->cfg->ops->set_hw_reg(hw,
388 HW_VAR_H2C_FW_PWRMODE,
389 (u8 *) (&fw_pwrmode));
7ea47240 390 fw_current_inps = false;
0c817338
LF		 391
392 rtlpriv->cfg->ops->set_hw_reg(hw,
393 HW_VAR_FW_PSMODE_STATUS,
7ea47240 394 (u8 *) (&fw_current_inps));
0c817338
LF		 395
396 } else {
397 if (rtl_get_fwlps_doze(hw)) {
398 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
399 ("FW LPS enter ps_mode:%x\n",
400 ppsc->fwctrl_psmode));
401
402 rpwm_val = 0x02; /* RF off */
7ea47240 403 fw_current_inps = true;
0c817338
LF		 404 rtlpriv->cfg->ops->set_hw_reg(hw,
405 HW_VAR_FW_PSMODE_STATUS,
7ea47240 406 (u8 *) (&fw_current_inps));
0c817338
LF		 407 rtlpriv->cfg->ops->set_hw_reg(hw,
408 HW_VAR_H2C_FW_PWRMODE,
409 (u8 *) (&ppsc->fwctrl_psmode));
410
411 rtlpriv->cfg->ops->set_hw_reg(hw,
412 HW_VAR_SET_RPWM,
413 (u8 *) (&rpwm_val));
414 } else {
415 /* Reset the power save related parameters. */
416 ppsc->dot11_psmode = EACTIVE;
417 }
418 }
419 }
420}
421
422/*Enter the leisure power save mode.*/
423void rtl_lps_enter(struct ieee80211_hw *hw)
424{
425 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
426 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
427 struct rtl_priv *rtlpriv = rtl_priv(hw);
428 unsigned long flag;
429
cc7dc0c4 430 if (!ppsc->fwctrl_lps)
0c817338
LF		 431 return;
432
433 if (rtlpriv->sec.being_setkey)
434 return;
435
7ea47240 436 if (rtlpriv->link_info.busytraffic)
0c817338
LF		 437 return;
438
439 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
440 if (mac->cnt_after_linked < 5)
441 return;
442
443 if (mac->opmode == NL80211_IFTYPE_ADHOC)
444 return;
445
446 if (mac->link_state != MAC80211_LINKED)
447 return;
448
449 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
450
cc7dc0c4
C		 451 /* Idle for a while if we connect to AP a while ago. */
452 if (mac->cnt_after_linked >= 2) {
453 if (ppsc->dot11_psmode == EACTIVE) {
454 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
0c817338
LF		 455 ("Enter 802.11 power save mode...\n"));
456
cc7dc0c4 457 rtl_lps_set_psmode(hw, EAUTOPS);
0c817338
LF		 458 }
459 }
cc7dc0c4 460
0c817338
LF		 461 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
462}
463
464/*Leave the leisure power save mode.*/
465void rtl_lps_leave(struct ieee80211_hw *hw)
466{
467 struct rtl_priv *rtlpriv = rtl_priv(hw);
468 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
469 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
470 unsigned long flag;
471
472 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
473
cc7dc0c4 474 if (ppsc->fwctrl_lps) {
0c817338
LF		 475 if (ppsc->dot11_psmode != EACTIVE) {
476
477 /*FIX ME */
478 rtlpriv->cfg->ops->enable_interrupt(hw);
479
480 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
cc7dc0c4 481 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
0c817338
LF		 482 rtlhal->interface == INTF_PCI) {
483 rtlpriv->intf_ops->disable_aspm(hw);
cc7dc0c4 484 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
0c817338
LF		 485 }
486
487 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
488 ("Busy Traffic,Leave 802.11 power save..\n"));
489
490 rtl_lps_set_psmode(hw, EACTIVE);
491 }
492 }
493 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
494}
cc7dc0c4
C		 495
496/* For sw LPS*/
497void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
498{
499 struct rtl_priv *rtlpriv = rtl_priv(hw);
500 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
501 struct ieee80211_hdr *hdr = (void *) data;
502 struct ieee80211_tim_ie *tim_ie;
503 u8 *tim;
504 u8 tim_len;
505 bool u_buffed;
506 bool m_buffed;
507
508 if (mac->opmode != NL80211_IFTYPE_STATION)
509 return;
510
511 if (!rtlpriv->psc.swctrl_lps)
512 return;
513
514 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
515 return;
516
517 if (!rtlpriv->psc.sw_ps_enabled)
518 return;
519
520 if (rtlpriv->psc.fwctrl_lps)
521 return;
522
523 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
524 return;
525
526 /* check if this really is a beacon */
527 if (!ieee80211_is_beacon(hdr->frame_control))
528 return;
529
530 /* min. beacon length + FCS_LEN */
531 if (len <= 40 + FCS_LEN)
532 return;
533
534 /* and only beacons from the associated BSSID, please */
535 if (compare_ether_addr(hdr->addr3, rtlpriv->mac80211.bssid))
536 return;
537
538 rtlpriv->psc.last_beacon = jiffies;
539
540 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
541 if (!tim)
542 return;
543
544 if (tim[1] < sizeof(*tim_ie))
545 return;
546
547 tim_len = tim[1];
548 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
549
550 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
551 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
552
553 /* Check whenever the PHY can be turned off again. */
554
555 /* 1. What about buffered unicast traffic for our AID? */
556 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
557 rtlpriv->mac80211.assoc_id);
558
559 /* 2. Maybe the AP wants to send multicast/broadcast data? */
560 m_buffed = tim_ie->bitmap_ctrl & 0x01;
561 rtlpriv->psc.multi_buffered = m_buffed;
562
563 /* unicast will process by mac80211 through
564 * set ~IEEE80211_CONF_PS, So we just check
565 * multicast frames here */
566 if (!m_buffed) {
567 /* back to low-power land. and delay is
568 * prevent null power save frame tx fail */
569 queue_delayed_work(rtlpriv->works.rtl_wq,
570 &rtlpriv->works.ps_work, MSECS(5));
571 } else {
572 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, ("u_bufferd: %x, "
573 "m_buffered: %x\n", u_buffed, m_buffed));
574 }
575}
576
577void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
578{
579 struct rtl_priv *rtlpriv = rtl_priv(hw);
580 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
581 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
582 unsigned long flag;
583
584 if (!rtlpriv->psc.swctrl_lps)
585 return;
586 if (mac->link_state != MAC80211_LINKED)
587 return;
588
589 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
590 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
591 rtlpriv->intf_ops->disable_aspm(hw);
592 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
593 }
594
595 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
596 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS, false);
597 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
598}
599
600void rtl_swlps_rfon_wq_callback(void *data)
601{
602 struct rtl_works *rtlworks =
603 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
604 struct ieee80211_hw *hw = rtlworks->hw;
605
606 rtl_swlps_rf_awake(hw);
607}
608
609void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
610{
611 struct rtl_priv *rtlpriv = rtl_priv(hw);
612 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
613 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
614 unsigned long flag;
615 u8 sleep_intv;
616
617 if (!rtlpriv->psc.sw_ps_enabled)
618 return;
619
620 if ((rtlpriv->sec.being_setkey) ||
621 (mac->opmode == NL80211_IFTYPE_ADHOC))
622 return;
623
624 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
625 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
626 return;
627
628 if (rtlpriv->link_info.busytraffic)
629 return;
630
631 spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
632 if (rtlpriv->psc.rfchange_inprogress) {
633 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
634 return;
635 }
636 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
637
638 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
639 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS, false);
640 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
641
642 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
643 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
644 rtlpriv->intf_ops->enable_aspm(hw);
645 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
646 }
647
648 /* here is power save alg, when this beacon is DTIM
649 * we will set sleep time to dtim_period * n;
650 * when this beacon is not DTIM, we will set sleep
651 * time to sleep_intv = rtlpriv->psc.dtim_counter or
652 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
653
654 if (rtlpriv->psc.dtim_counter == 0) {
655 if (hw->conf.ps_dtim_period == 1)
656 sleep_intv = hw->conf.ps_dtim_period * 2;
657 else
658 sleep_intv = hw->conf.ps_dtim_period;
659 } else {
660 sleep_intv = rtlpriv->psc.dtim_counter;
661 }
662
663 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
664 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
665
666 /* this print should always be dtim_conter = 0 &
667 * sleep = dtim_period, that meaons, we should
668 * awake before every dtim */
669 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
670 ("dtim_counter:%x will sleep :%d"
671 " beacon_intv\n", rtlpriv->psc.dtim_counter, sleep_intv));
672
673 /* we tested that 40ms is enough for sw & hw sw delay */
674 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
675 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
676}
677
678
679void rtl_swlps_wq_callback(void *data)
680{
681 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
682 struct rtl_works,
683 ps_work);
684 struct ieee80211_hw *hw = rtlworks->hw;
685 struct rtl_priv *rtlpriv = rtl_priv(hw);
686 bool ps = false;
687
688 ps = (hw->conf.flags & IEEE80211_CONF_PS);
689
690 /* we can sleep after ps null send ok */
691 if (rtlpriv->psc.state_inap) {
692 rtl_swlps_rf_sleep(hw);
693
694 if (rtlpriv->psc.state && !ps) {
695 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
696 rtlpriv->psc.last_action);
697 }
698
699 if (ps)
700 rtlpriv->psc.last_slept = jiffies;
701
702 rtlpriv->psc.last_action = jiffies;
703 rtlpriv->psc.state = ps;
704 }
705}
Linux kernel - Deliverables
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