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 rtlpriv->cfg->ops->switch_channel(hw); 55 rtlpriv->cfg->ops->set_channel_access(hw); 56 rtlpriv->cfg->ops->set_bw_mode(hw, 57 cfg80211_get_chandef_type(&hw->conf.chandef)); 58 59 /*<3> Enable Interrupt */ 60 rtlpriv->cfg->ops->enable_interrupt(hw); 61 62 /*<enable timer> */ 63 rtl_watch_dog_timer_callback(&rtlpriv->works.watchdog_timer); 64 65 return true; 66 } 67 EXPORT_SYMBOL(rtl_ps_enable_nic); 68 69 bool rtl_ps_disable_nic(struct ieee80211_hw *hw) 70 { 71 struct rtl_priv *rtlpriv = rtl_priv(hw); 72 73 /*<1> Stop all timer */ 74 rtl_deinit_deferred_work(hw, true); 75 76 /*<2> Disable Interrupt */ 77 rtlpriv->cfg->ops->disable_interrupt(hw); 78 tasklet_kill(&rtlpriv->works.irq_tasklet); 79 80 /*<3> Disable Adapter */ 81 rtlpriv->cfg->ops->hw_disable(hw); 82 83 return true; 84 } 85 EXPORT_SYMBOL(rtl_ps_disable_nic); 86 87 static bool rtl_ps_set_rf_state(struct ieee80211_hw *hw, 88 enum rf_pwrstate state_toset, 89 u32 changesource) 90 { 91 struct rtl_priv *rtlpriv = rtl_priv(hw); 92 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 93 enum rf_pwrstate rtstate; 94 bool actionallowed = false; 95 u16 rfwait_cnt = 0; 96 97 /*Only one thread can change 98 *the RF state at one time, and others 99 *should wait to be executed. 100 */ 101 while (true) { 102 spin_lock(&rtlpriv->locks.rf_ps_lock); 103 if (ppsc->rfchange_inprogress) { 104 spin_unlock(&rtlpriv->locks.rf_ps_lock); 105 106 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING, 107 "RF Change in progress! Wait to set..state_toset(%d).\n", 108 state_toset); 109 110 /* Set RF after the previous action is done. */ 111 while (ppsc->rfchange_inprogress) { 112 rfwait_cnt++; 113 mdelay(1); 114 /*Wait too long, return false to avoid 115 *to be stuck here. 116 */ 117 if (rfwait_cnt > 100) 118 return false; 119 } 120 } else { 121 ppsc->rfchange_inprogress = true; 122 spin_unlock(&rtlpriv->locks.rf_ps_lock); 123 break; 124 } 125 } 126 127 rtstate = ppsc->rfpwr_state; 128 129 switch (state_toset) { 130 case ERFON: 131 ppsc->rfoff_reason &= (~changesource); 132 133 if ((changesource == RF_CHANGE_BY_HW) && 134 (ppsc->hwradiooff)) { 135 ppsc->hwradiooff = false; 136 } 137 138 if (!ppsc->rfoff_reason) { 139 ppsc->rfoff_reason = 0; 140 actionallowed = true; 141 } 142 143 break; 144 145 case ERFOFF: 146 147 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) { 148 ppsc->hwradiooff = true; 149 } 150 151 ppsc->rfoff_reason |= changesource; 152 actionallowed = true; 153 break; 154 155 case ERFSLEEP: 156 ppsc->rfoff_reason |= changesource; 157 actionallowed = true; 158 break; 159 160 default: 161 pr_err("switch case %#x not processed\n", state_toset); 162 break; 163 } 164 165 if (actionallowed) 166 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset); 167 168 spin_lock(&rtlpriv->locks.rf_ps_lock); 169 ppsc->rfchange_inprogress = false; 170 spin_unlock(&rtlpriv->locks.rf_ps_lock); 171 172 return actionallowed; 173 } 174 175 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw) 176 { 177 struct rtl_priv *rtlpriv = rtl_priv(hw); 178 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 179 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 180 181 ppsc->swrf_processing = true; 182 183 if (ppsc->inactive_pwrstate == ERFON && 184 rtlhal->interface == INTF_PCI) { 185 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) && 186 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) && 187 rtlhal->interface == INTF_PCI) { 188 rtlpriv->intf_ops->disable_aspm(hw); 189 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 190 } 191 } 192 193 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate, 194 RF_CHANGE_BY_IPS); 195 196 if (ppsc->inactive_pwrstate == ERFOFF && 197 rtlhal->interface == INTF_PCI) { 198 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM && 199 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) { 200 rtlpriv->intf_ops->enable_aspm(hw); 201 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 202 } 203 } 204 205 ppsc->swrf_processing = false; 206 } 207 208 void rtl_ips_nic_off_wq_callback(void *data) 209 { 210 struct rtl_works *rtlworks = 211 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq); 212 struct ieee80211_hw *hw = rtlworks->hw; 213 struct rtl_priv *rtlpriv = rtl_priv(hw); 214 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 215 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 216 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 217 enum rf_pwrstate rtstate; 218 219 if (mac->opmode != NL80211_IFTYPE_STATION) { 220 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING, 221 "not station return\n"); 222 return; 223 } 224 225 if (mac->p2p_in_use) 226 return; 227 228 if (mac->link_state > MAC80211_NOLINK) 229 return; 230 231 if (is_hal_stop(rtlhal)) 232 return; 233 234 if (rtlpriv->sec.being_setkey) 235 return; 236 237 if (rtlpriv->cfg->ops->bt_coex_off_before_lps) 238 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw); 239 240 if (ppsc->inactiveps) { 241 rtstate = ppsc->rfpwr_state; 242 243 /* 244 *Do not enter IPS in the following conditions: 245 *(1) RF is already OFF or Sleep 246 *(2) swrf_processing (indicates the IPS is still under going) 247 *(3) Connectted (only disconnected can trigger IPS) 248 *(4) IBSS (send Beacon) 249 *(5) AP mode (send Beacon) 250 *(6) monitor mode (rcv packet) 251 */ 252 253 if (rtstate == ERFON && 254 !ppsc->swrf_processing && 255 (mac->link_state == MAC80211_NOLINK) && 256 !mac->act_scanning) { 257 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE, 258 "IPSEnter(): Turn off RF\n"); 259 260 ppsc->inactive_pwrstate = ERFOFF; 261 ppsc->in_powersavemode = true; 262 263 /* call before RF off */ 264 if (rtlpriv->cfg->ops->get_btc_status()) 265 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv, 266 ppsc->inactive_pwrstate); 267 268 /*rtl_pci_reset_trx_ring(hw); */ 269 _rtl_ps_inactive_ps(hw); 270 } 271 } 272 } 273 274 void rtl_ips_nic_off(struct ieee80211_hw *hw) 275 { 276 struct rtl_priv *rtlpriv = rtl_priv(hw); 277 278 /* because when link with ap, mac80211 will ask us 279 * to disable nic quickly after scan before linking, 280 * this will cause link failed, so we delay 100ms here 281 */ 282 queue_delayed_work(rtlpriv->works.rtl_wq, 283 &rtlpriv->works.ips_nic_off_wq, MSECS(100)); 284 } 285 286 /* NOTICE: any opmode should exc nic_on, or disable without 287 * nic_on may something wrong, like adhoc TP 288 */ 289 void rtl_ips_nic_on(struct ieee80211_hw *hw) 290 { 291 struct rtl_priv *rtlpriv = rtl_priv(hw); 292 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 293 enum rf_pwrstate rtstate; 294 295 cancel_delayed_work_sync(&rtlpriv->works.ips_nic_off_wq); 296 297 mutex_lock(&rtlpriv->locks.ips_mutex); 298 if (ppsc->inactiveps) { 299 rtstate = ppsc->rfpwr_state; 300 301 if (rtstate != ERFON && 302 !ppsc->swrf_processing && 303 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) { 304 305 ppsc->inactive_pwrstate = ERFON; 306 ppsc->in_powersavemode = false; 307 _rtl_ps_inactive_ps(hw); 308 /* call after RF on */ 309 if (rtlpriv->cfg->ops->get_btc_status()) 310 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv, 311 ppsc->inactive_pwrstate); 312 } 313 } 314 mutex_unlock(&rtlpriv->locks.ips_mutex); 315 } 316 EXPORT_SYMBOL_GPL(rtl_ips_nic_on); 317 318 /*for FW LPS*/ 319 320 /* 321 *Determine if we can set Fw into PS mode 322 *in current condition.Return TRUE if it 323 *can enter PS mode. 324 */ 325 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw) 326 { 327 struct rtl_priv *rtlpriv = rtl_priv(hw); 328 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 329 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 330 u32 ps_timediff; 331 332 ps_timediff = jiffies_to_msecs(jiffies - 333 ppsc->last_delaylps_stamp_jiffies); 334 335 if (ps_timediff < 2000) { 336 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD, 337 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n"); 338 return false; 339 } 340 341 if (mac->link_state != MAC80211_LINKED) 342 return false; 343 344 if (mac->opmode == NL80211_IFTYPE_ADHOC) 345 return false; 346 347 return true; 348 } 349 350 /* Change current and default preamble mode.*/ 351 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode) 352 { 353 struct rtl_priv *rtlpriv = rtl_priv(hw); 354 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 355 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 356 bool enter_fwlps; 357 358 if (mac->opmode == NL80211_IFTYPE_ADHOC) 359 return; 360 361 if (mac->link_state != MAC80211_LINKED) 362 return; 363 364 if (ppsc->dot11_psmode == rt_psmode && rt_psmode == EACTIVE) 365 return; 366 367 /* Update power save mode configured. */ 368 ppsc->dot11_psmode = rt_psmode; 369 370 /* 371 *<FW control LPS> 372 *1. Enter PS mode 373 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode 374 * cmd to set Fw into PS mode. 375 *2. Leave PS mode 376 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active 377 * mode and set RPWM to turn RF on. 378 */ 379 380 if ((ppsc->fwctrl_lps) && ppsc->report_linked) { 381 if (ppsc->dot11_psmode == EACTIVE) { 382 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG, 383 "FW LPS leave ps_mode:%x\n", 384 FW_PS_ACTIVE_MODE); 385 enter_fwlps = false; 386 ppsc->pwr_mode = FW_PS_ACTIVE_MODE; 387 ppsc->smart_ps = 0; 388 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION, 389 (u8 *)(&enter_fwlps)); 390 if (ppsc->p2p_ps_info.opp_ps) 391 rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE); 392 393 if (rtlpriv->cfg->ops->get_btc_status()) 394 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode); 395 } else { 396 if (rtl_get_fwlps_doze(hw)) { 397 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG, 398 "FW LPS enter ps_mode:%x\n", 399 ppsc->fwctrl_psmode); 400 if (rtlpriv->cfg->ops->get_btc_status()) 401 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode); 402 enter_fwlps = true; 403 ppsc->pwr_mode = ppsc->fwctrl_psmode; 404 ppsc->smart_ps = 2; 405 rtlpriv->cfg->ops->set_hw_reg(hw, 406 HW_VAR_FW_LPS_ACTION, 407 (u8 *)(&enter_fwlps)); 408 409 } else { 410 /* Reset the power save related parameters. */ 411 ppsc->dot11_psmode = EACTIVE; 412 } 413 } 414 } 415 } 416 417 /* Interrupt safe routine to enter the leisure power save mode.*/ 418 static void rtl_lps_enter_core(struct ieee80211_hw *hw) 419 { 420 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 421 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 422 struct rtl_priv *rtlpriv = rtl_priv(hw); 423 424 if (!ppsc->fwctrl_lps) 425 return; 426 427 if (rtlpriv->sec.being_setkey) 428 return; 429 430 if (rtlpriv->link_info.busytraffic) 431 return; 432 433 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */ 434 if (mac->cnt_after_linked < 5) 435 return; 436 437 if (mac->opmode == NL80211_IFTYPE_ADHOC) 438 return; 439 440 if (mac->link_state != MAC80211_LINKED) 441 return; 442 443 mutex_lock(&rtlpriv->locks.lps_mutex); 444 445 /* Don't need to check (ppsc->dot11_psmode == EACTIVE), because 446 * bt_ccoexist may ask to enter lps. 447 * In normal case, this constraint move to rtl_lps_set_psmode(). 448 */ 449 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD, 450 "Enter 802.11 power save mode...\n"); 451 rtl_lps_set_psmode(hw, EAUTOPS); 452 453 mutex_unlock(&rtlpriv->locks.lps_mutex); 454 } 455 456 /* Interrupt safe routine to leave the leisure power save mode.*/ 457 static void rtl_lps_leave_core(struct ieee80211_hw *hw) 458 { 459 struct rtl_priv *rtlpriv = rtl_priv(hw); 460 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 461 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 462 463 mutex_lock(&rtlpriv->locks.lps_mutex); 464 465 if (ppsc->fwctrl_lps) { 466 if (ppsc->dot11_psmode != EACTIVE) { 467 468 /*FIX ME */ 469 /*rtlpriv->cfg->ops->enable_interrupt(hw); */ 470 471 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM && 472 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) && 473 rtlhal->interface == INTF_PCI) { 474 rtlpriv->intf_ops->disable_aspm(hw); 475 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 476 } 477 478 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD, 479 "Busy Traffic,Leave 802.11 power save..\n"); 480 481 rtl_lps_set_psmode(hw, EACTIVE); 482 } 483 } 484 mutex_unlock(&rtlpriv->locks.lps_mutex); 485 } 486 487 /* For sw LPS*/ 488 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len) 489 { 490 struct rtl_priv *rtlpriv = rtl_priv(hw); 491 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 492 struct ieee80211_hdr *hdr = data; 493 struct ieee80211_tim_ie *tim_ie; 494 u8 *tim; 495 u8 tim_len; 496 bool u_buffed; 497 bool m_buffed; 498 499 if (mac->opmode != NL80211_IFTYPE_STATION) 500 return; 501 502 if (!rtlpriv->psc.swctrl_lps) 503 return; 504 505 if (rtlpriv->mac80211.link_state != MAC80211_LINKED) 506 return; 507 508 if (!rtlpriv->psc.sw_ps_enabled) 509 return; 510 511 if (rtlpriv->psc.fwctrl_lps) 512 return; 513 514 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS))) 515 return; 516 517 /* check if this really is a beacon */ 518 if (!ieee80211_is_beacon(hdr->frame_control)) 519 return; 520 521 /* min. beacon length + FCS_LEN */ 522 if (len <= 40 + FCS_LEN) 523 return; 524 525 /* and only beacons from the associated BSSID, please */ 526 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid)) 527 return; 528 529 rtlpriv->psc.last_beacon = jiffies; 530 531 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM); 532 if (!tim) 533 return; 534 535 if (tim[1] < sizeof(*tim_ie)) 536 return; 537 538 tim_len = tim[1]; 539 tim_ie = (struct ieee80211_tim_ie *) &tim[2]; 540 541 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period)) 542 rtlpriv->psc.dtim_counter = tim_ie->dtim_count; 543 544 /* Check whenever the PHY can be turned off again. */ 545 546 /* 1. What about buffered unicast traffic for our AID? */ 547 u_buffed = ieee80211_check_tim(tim_ie, tim_len, 548 rtlpriv->mac80211.assoc_id); 549 550 /* 2. Maybe the AP wants to send multicast/broadcast data? */ 551 m_buffed = tim_ie->bitmap_ctrl & 0x01; 552 rtlpriv->psc.multi_buffered = m_buffed; 553 554 /* unicast will process by mac80211 through 555 * set ~IEEE80211_CONF_PS, So we just check 556 * multicast frames here */ 557 if (!m_buffed) { 558 /* back to low-power land. and delay is 559 * prevent null power save frame tx fail */ 560 queue_delayed_work(rtlpriv->works.rtl_wq, 561 &rtlpriv->works.ps_work, MSECS(5)); 562 } else { 563 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, 564 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed); 565 } 566 } 567 EXPORT_SYMBOL_GPL(rtl_swlps_beacon); 568 569 void rtl_swlps_rf_awake(struct ieee80211_hw *hw) 570 { 571 struct rtl_priv *rtlpriv = rtl_priv(hw); 572 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 573 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 574 575 if (!rtlpriv->psc.swctrl_lps) 576 return; 577 if (mac->link_state != MAC80211_LINKED) 578 return; 579 580 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM && 581 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) { 582 rtlpriv->intf_ops->disable_aspm(hw); 583 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 584 } 585 586 mutex_lock(&rtlpriv->locks.lps_mutex); 587 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS); 588 mutex_unlock(&rtlpriv->locks.lps_mutex); 589 } 590 591 void rtl_swlps_rfon_wq_callback(void *data) 592 { 593 struct rtl_works *rtlworks = 594 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq); 595 struct ieee80211_hw *hw = rtlworks->hw; 596 597 rtl_swlps_rf_awake(hw); 598 } 599 600 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw) 601 { 602 struct rtl_priv *rtlpriv = rtl_priv(hw); 603 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 604 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 605 u8 sleep_intv; 606 607 if (!rtlpriv->psc.sw_ps_enabled) 608 return; 609 610 if ((rtlpriv->sec.being_setkey) || 611 (mac->opmode == NL80211_IFTYPE_ADHOC)) 612 return; 613 614 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */ 615 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5)) 616 return; 617 618 if (rtlpriv->link_info.busytraffic) 619 return; 620 621 spin_lock(&rtlpriv->locks.rf_ps_lock); 622 if (rtlpriv->psc.rfchange_inprogress) { 623 spin_unlock(&rtlpriv->locks.rf_ps_lock); 624 return; 625 } 626 spin_unlock(&rtlpriv->locks.rf_ps_lock); 627 628 mutex_lock(&rtlpriv->locks.lps_mutex); 629 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS); 630 mutex_unlock(&rtlpriv->locks.lps_mutex); 631 632 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM && 633 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) { 634 rtlpriv->intf_ops->enable_aspm(hw); 635 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 636 } 637 638 /* here is power save alg, when this beacon is DTIM 639 * we will set sleep time to dtim_period * n; 640 * when this beacon is not DTIM, we will set sleep 641 * time to sleep_intv = rtlpriv->psc.dtim_counter or 642 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */ 643 644 if (rtlpriv->psc.dtim_counter == 0) { 645 if (hw->conf.ps_dtim_period == 1) 646 sleep_intv = hw->conf.ps_dtim_period * 2; 647 else 648 sleep_intv = hw->conf.ps_dtim_period; 649 } else { 650 sleep_intv = rtlpriv->psc.dtim_counter; 651 } 652 653 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV) 654 sleep_intv = MAX_SW_LPS_SLEEP_INTV; 655 656 /* this print should always be dtim_conter = 0 & 657 * sleep = dtim_period, that meaons, we should 658 * awake before every dtim */ 659 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, 660 "dtim_counter:%x will sleep :%d beacon_intv\n", 661 rtlpriv->psc.dtim_counter, sleep_intv); 662 663 /* we tested that 40ms is enough for sw & hw sw delay */ 664 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq, 665 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40)); 666 } 667 668 void rtl_lps_change_work_callback(struct work_struct *work) 669 { 670 struct rtl_works *rtlworks = 671 container_of(work, struct rtl_works, lps_change_work); 672 struct ieee80211_hw *hw = rtlworks->hw; 673 struct rtl_priv *rtlpriv = rtl_priv(hw); 674 675 if (rtlpriv->enter_ps) 676 rtl_lps_enter_core(hw); 677 else 678 rtl_lps_leave_core(hw); 679 } 680 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback); 681 682 void rtl_lps_enter(struct ieee80211_hw *hw) 683 { 684 struct rtl_priv *rtlpriv = rtl_priv(hw); 685 686 if (!in_interrupt()) 687 return rtl_lps_enter_core(hw); 688 rtlpriv->enter_ps = true; 689 schedule_work(&rtlpriv->works.lps_change_work); 690 } 691 EXPORT_SYMBOL_GPL(rtl_lps_enter); 692 693 void rtl_lps_leave(struct ieee80211_hw *hw) 694 { 695 struct rtl_priv *rtlpriv = rtl_priv(hw); 696 697 if (!in_interrupt()) 698 return rtl_lps_leave_core(hw); 699 rtlpriv->enter_ps = false; 700 schedule_work(&rtlpriv->works.lps_change_work); 701 } 702 EXPORT_SYMBOL_GPL(rtl_lps_leave); 703 704 void rtl_swlps_wq_callback(void *data) 705 { 706 struct rtl_works *rtlworks = container_of_dwork_rtl(data, 707 struct rtl_works, 708 ps_work); 709 struct ieee80211_hw *hw = rtlworks->hw; 710 struct rtl_priv *rtlpriv = rtl_priv(hw); 711 bool ps = false; 712 713 ps = (hw->conf.flags & IEEE80211_CONF_PS); 714 715 /* we can sleep after ps null send ok */ 716 if (rtlpriv->psc.state_inap) { 717 rtl_swlps_rf_sleep(hw); 718 719 if (rtlpriv->psc.state && !ps) { 720 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies - 721 rtlpriv->psc.last_action); 722 } 723 724 if (ps) 725 rtlpriv->psc.last_slept = jiffies; 726 727 rtlpriv->psc.last_action = jiffies; 728 rtlpriv->psc.state = ps; 729 } 730 } 731 732 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data, 733 unsigned int len) 734 { 735 struct rtl_priv *rtlpriv = rtl_priv(hw); 736 struct ieee80211_mgmt *mgmt = data; 737 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info); 738 u8 *pos, *end, *ie; 739 u16 noa_len; 740 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09}; 741 u8 noa_num, index , i, noa_index = 0; 742 bool find_p2p_ie = false , find_p2p_ps_ie = false; 743 pos = (u8 *)mgmt->u.beacon.variable; 744 end = data + len; 745 ie = NULL; 746 747 while (pos + 1 < end) { 748 if (pos + 2 + pos[1] > end) 749 return; 750 751 if (pos[0] == 221 && pos[1] > 4) { 752 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) { 753 ie = pos + 2+4; 754 break; 755 } 756 } 757 pos += 2 + pos[1]; 758 } 759 760 if (ie == NULL) 761 return; 762 find_p2p_ie = true; 763 /*to find noa ie*/ 764 while (ie + 1 < end) { 765 noa_len = READEF2BYTE((__le16 *)&ie[1]); 766 if (ie + 3 + ie[1] > end) 767 return; 768 769 if (ie[0] == 12) { 770 find_p2p_ps_ie = true; 771 if ((noa_len - 2) % 13 != 0) { 772 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD, 773 "P2P notice of absence: invalid length.%d\n", 774 noa_len); 775 return; 776 } else { 777 noa_num = (noa_len - 2) / 13; 778 } 779 noa_index = ie[3]; 780 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode == 781 P2P_PS_NONE || noa_index != p2pinfo->noa_index) { 782 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, 783 "update NOA ie.\n"); 784 p2pinfo->noa_index = noa_index; 785 p2pinfo->opp_ps = (ie[4] >> 7); 786 p2pinfo->ctwindow = ie[4] & 0x7F; 787 p2pinfo->noa_num = noa_num; 788 index = 5; 789 for (i = 0; i < noa_num; i++) { 790 p2pinfo->noa_count_type[i] = 791 READEF1BYTE(ie+index); 792 index += 1; 793 p2pinfo->noa_duration[i] = 794 READEF4BYTE((__le32 *)ie+index); 795 index += 4; 796 p2pinfo->noa_interval[i] = 797 READEF4BYTE((__le32 *)ie+index); 798 index += 4; 799 p2pinfo->noa_start_time[i] = 800 READEF4BYTE((__le32 *)ie+index); 801 index += 4; 802 } 803 804 if (p2pinfo->opp_ps == 1) { 805 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW; 806 /* Driver should wait LPS entering 807 * CTWindow 808 */ 809 if (rtlpriv->psc.fw_current_inpsmode) 810 rtl_p2p_ps_cmd(hw, 811 P2P_PS_ENABLE); 812 } else if (p2pinfo->noa_num > 0) { 813 p2pinfo->p2p_ps_mode = P2P_PS_NOA; 814 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE); 815 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) { 816 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE); 817 } 818 } 819 break; 820 } 821 ie += 3 + noa_len; 822 } 823 824 if (find_p2p_ie == true) { 825 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) && 826 (find_p2p_ps_ie == false)) 827 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE); 828 } 829 } 830 831 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data, 832 unsigned int len) 833 { 834 struct rtl_priv *rtlpriv = rtl_priv(hw); 835 struct ieee80211_mgmt *mgmt = data; 836 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info); 837 u8 noa_num, index , i , noa_index = 0; 838 u8 *pos, *end, *ie; 839 u16 noa_len; 840 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09}; 841 842 pos = (u8 *)&mgmt->u.action.category; 843 end = data + len; 844 ie = NULL; 845 846 if (pos[0] == 0x7f) { 847 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0) 848 ie = pos + 3+4; 849 } 850 851 if (ie == NULL) 852 return; 853 854 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n"); 855 /*to find noa ie*/ 856 while (ie + 1 < end) { 857 noa_len = READEF2BYTE((__le16 *)&ie[1]); 858 if (ie + 3 + ie[1] > end) 859 return; 860 861 if (ie[0] == 12) { 862 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n"); 863 RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ", 864 ie, noa_len); 865 if ((noa_len - 2) % 13 != 0) { 866 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, 867 "P2P notice of absence: invalid length.%d\n", 868 noa_len); 869 return; 870 } else { 871 noa_num = (noa_len - 2) / 13; 872 } 873 noa_index = ie[3]; 874 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode == 875 P2P_PS_NONE || noa_index != p2pinfo->noa_index) { 876 p2pinfo->noa_index = noa_index; 877 p2pinfo->opp_ps = (ie[4] >> 7); 878 p2pinfo->ctwindow = ie[4] & 0x7F; 879 p2pinfo->noa_num = noa_num; 880 index = 5; 881 for (i = 0; i < noa_num; i++) { 882 p2pinfo->noa_count_type[i] = 883 READEF1BYTE(ie+index); 884 index += 1; 885 p2pinfo->noa_duration[i] = 886 READEF4BYTE((__le32 *)ie+index); 887 index += 4; 888 p2pinfo->noa_interval[i] = 889 READEF4BYTE((__le32 *)ie+index); 890 index += 4; 891 p2pinfo->noa_start_time[i] = 892 READEF4BYTE((__le32 *)ie+index); 893 index += 4; 894 } 895 896 if (p2pinfo->opp_ps == 1) { 897 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW; 898 /* Driver should wait LPS entering 899 * CTWindow 900 */ 901 if (rtlpriv->psc.fw_current_inpsmode) 902 rtl_p2p_ps_cmd(hw, 903 P2P_PS_ENABLE); 904 } else if (p2pinfo->noa_num > 0) { 905 p2pinfo->p2p_ps_mode = P2P_PS_NOA; 906 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE); 907 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) { 908 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE); 909 } 910 } 911 break; 912 } 913 ie += 3 + noa_len; 914 } 915 } 916 917 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state) 918 { 919 struct rtl_priv *rtlpriv = rtl_priv(hw); 920 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw)); 921 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info); 922 923 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n" , p2p_ps_state); 924 switch (p2p_ps_state) { 925 case P2P_PS_DISABLE: 926 p2pinfo->p2p_ps_state = p2p_ps_state; 927 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD, 928 &p2p_ps_state); 929 p2pinfo->noa_index = 0; 930 p2pinfo->ctwindow = 0; 931 p2pinfo->opp_ps = 0; 932 p2pinfo->noa_num = 0; 933 p2pinfo->p2p_ps_mode = P2P_PS_NONE; 934 if (rtlps->fw_current_inpsmode) { 935 if (rtlps->smart_ps == 0) { 936 rtlps->smart_ps = 2; 937 rtlpriv->cfg->ops->set_hw_reg(hw, 938 HW_VAR_H2C_FW_PWRMODE, 939 &rtlps->pwr_mode); 940 } 941 942 } 943 break; 944 case P2P_PS_ENABLE: 945 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) { 946 p2pinfo->p2p_ps_state = p2p_ps_state; 947 948 if (p2pinfo->ctwindow > 0) { 949 if (rtlps->smart_ps != 0) { 950 rtlps->smart_ps = 0; 951 rtlpriv->cfg->ops->set_hw_reg(hw, 952 HW_VAR_H2C_FW_PWRMODE, 953 &rtlps->pwr_mode); 954 } 955 } 956 rtlpriv->cfg->ops->set_hw_reg(hw, 957 HW_VAR_H2C_FW_P2P_PS_OFFLOAD, 958 &p2p_ps_state); 959 960 } 961 break; 962 case P2P_PS_SCAN: 963 case P2P_PS_SCAN_DONE: 964 case P2P_PS_ALLSTASLEEP: 965 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) { 966 p2pinfo->p2p_ps_state = p2p_ps_state; 967 rtlpriv->cfg->ops->set_hw_reg(hw, 968 HW_VAR_H2C_FW_P2P_PS_OFFLOAD, 969 &p2p_ps_state); 970 } 971 break; 972 default: 973 break; 974 } 975 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, 976 "ctwindow %x oppps %x\n", 977 p2pinfo->ctwindow , p2pinfo->opp_ps); 978 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, 979 "count %x duration %x index %x interval %x start time %x noa num %x\n", 980 p2pinfo->noa_count_type[0], 981 p2pinfo->noa_duration[0], 982 p2pinfo->noa_index, 983 p2pinfo->noa_interval[0], 984 p2pinfo->noa_start_time[0], 985 p2pinfo->noa_num); 986 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n"); 987 } 988 989 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len) 990 { 991 struct rtl_priv *rtlpriv = rtl_priv(hw); 992 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 993 struct ieee80211_hdr *hdr = data; 994 995 if (!mac->p2p) 996 return; 997 if (mac->link_state != MAC80211_LINKED) 998 return; 999 /* min. beacon length + FCS_LEN */ 1000 if (len <= 40 + FCS_LEN) 1001 return; 1002 1003 /* and only beacons from the associated BSSID, please */ 1004 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid)) 1005 return; 1006 1007 /* check if this really is a beacon */ 1008 if (!(ieee80211_is_beacon(hdr->frame_control) || 1009 ieee80211_is_probe_resp(hdr->frame_control) || 1010 ieee80211_is_action(hdr->frame_control))) 1011 return; 1012 1013 if (ieee80211_is_action(hdr->frame_control)) 1014 rtl_p2p_action_ie(hw , data , len - FCS_LEN); 1015 else 1016 rtl_p2p_noa_ie(hw , data , len - FCS_LEN); 1017 } 1018 EXPORT_SYMBOL_GPL(rtl_p2p_info); 1019