drivers/staging/rtlwifi/ps.c

   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((unsigned long)hw);
  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 }