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ubuntu-linux-kernel/drivers/net/wireless/realtek/rtlwifi/ps.c

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/******************************************************************************
*
* Copyright(c) 2009-2012 Realtek Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* wlanfae <wlanfae@realtek.com>
* Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
* Hsinchu 300, Taiwan.
*
* Larry Finger <Larry.Finger@lwfinger.net>
*
*****************************************************************************/
#include "wifi.h"
#include "base.h"
#include "ps.h"
#include <linux/export.h>
#include "btcoexist/rtl_btc.h"
bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
/*<1> reset trx ring */
if (rtlhal->interface == INTF_PCI)
rtlpriv->intf_ops->reset_trx_ring(hw);
if (is_hal_stop(rtlhal))
RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
"Driver is already down!\n");
/*<2> Enable Adapter */
if (rtlpriv->cfg->ops->hw_init(hw))
return false;
rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RETRY_LIMIT,
&rtlmac->retry_long);
RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
/*<3> Enable Interrupt */
rtlpriv->cfg->ops->enable_interrupt(hw);
/*<enable timer> */
rtl_watch_dog_timer_callback(&rtlpriv->works.watchdog_timer);
return true;
}
EXPORT_SYMBOL(rtl_ps_enable_nic);
bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
/*<1> Stop all timer */
rtl_deinit_deferred_work(hw);
/*<2> Disable Interrupt */
rtlpriv->cfg->ops->disable_interrupt(hw);
tasklet_kill(&rtlpriv->works.irq_tasklet);
/*<3> Disable Adapter */
rtlpriv->cfg->ops->hw_disable(hw);
return true;
}
EXPORT_SYMBOL(rtl_ps_disable_nic);
static bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
enum rf_pwrstate state_toset,
u32 changesource)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
enum rf_pwrstate rtstate;
bool actionallowed = false;
u16 rfwait_cnt = 0;
/*Only one thread can change
*the RF state at one time, and others
*should wait to be executed.
*/
while (true) {
spin_lock(&rtlpriv->locks.rf_ps_lock);
if (ppsc->rfchange_inprogress) {
spin_unlock(&rtlpriv->locks.rf_ps_lock);
RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
"RF Change in progress! Wait to set..state_toset(%d).\n",
state_toset);
/* Set RF after the previous action is done. */
while (ppsc->rfchange_inprogress) {
rfwait_cnt++;
mdelay(1);
/*Wait too long, return false to avoid
*to be stuck here.
*/
if (rfwait_cnt > 100)
return false;
}
} else {
ppsc->rfchange_inprogress = true;
spin_unlock(&rtlpriv->locks.rf_ps_lock);
break;
}
}
rtstate = ppsc->rfpwr_state;
switch (state_toset) {
case ERFON:
ppsc->rfoff_reason &= (~changesource);
if ((changesource == RF_CHANGE_BY_HW) &&
(ppsc->hwradiooff)) {
ppsc->hwradiooff = false;
}
if (!ppsc->rfoff_reason) {
ppsc->rfoff_reason = 0;
actionallowed = true;
}
break;
case ERFOFF:
if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
ppsc->hwradiooff = true;
}
ppsc->rfoff_reason |= changesource;
actionallowed = true;
break;
case ERFSLEEP:
ppsc->rfoff_reason |= changesource;
actionallowed = true;
break;
default:
pr_err("switch case %#x not processed\n", state_toset);
break;
}
if (actionallowed)
rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
spin_lock(&rtlpriv->locks.rf_ps_lock);
ppsc->rfchange_inprogress = false;
spin_unlock(&rtlpriv->locks.rf_ps_lock);
return actionallowed;
}
static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
ppsc->swrf_processing = true;
if (ppsc->inactive_pwrstate == ERFON &&
rtlhal->interface == INTF_PCI) {
if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
rtlhal->interface == INTF_PCI) {
rtlpriv->intf_ops->disable_aspm(hw);
RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
}
}
rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
RF_CHANGE_BY_IPS);
if (ppsc->inactive_pwrstate == ERFOFF &&
rtlhal->interface == INTF_PCI) {
if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
!RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
rtlpriv->intf_ops->enable_aspm(hw);
RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
}
}
ppsc->swrf_processing = false;
}
void rtl_ips_nic_off_wq_callback(void *data)
{
struct rtl_works *rtlworks =
container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
struct ieee80211_hw *hw = rtlworks->hw;
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
enum rf_pwrstate rtstate;
if (mac->opmode != NL80211_IFTYPE_STATION) {
RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
"not station return\n");
return;
}
if (mac->p2p_in_use)
return;
if (mac->link_state > MAC80211_NOLINK)
return;
if (is_hal_stop(rtlhal))
return;
if (rtlpriv->sec.being_setkey)
return;
if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
if (ppsc->inactiveps) {
rtstate = ppsc->rfpwr_state;
/*
*Do not enter IPS in the following conditions:
*(1) RF is already OFF or Sleep
*(2) swrf_processing (indicates the IPS is still under going)
*(3) Connectted (only disconnected can trigger IPS)
*(4) IBSS (send Beacon)
*(5) AP mode (send Beacon)
*(6) monitor mode (rcv packet)
*/
if (rtstate == ERFON &&
!ppsc->swrf_processing &&
(mac->link_state == MAC80211_NOLINK) &&
!mac->act_scanning) {
RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
"IPSEnter(): Turn off RF\n");
ppsc->inactive_pwrstate = ERFOFF;
ppsc->in_powersavemode = true;
/* call before RF off */
if (rtlpriv->cfg->ops->get_btc_status())
rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
ppsc->inactive_pwrstate);
/*rtl_pci_reset_trx_ring(hw); */
_rtl_ps_inactive_ps(hw);
}
}
}
void rtl_ips_nic_off(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
/* because when link with ap, mac80211 will ask us
* to disable nic quickly after scan before linking,
* this will cause link failed, so we delay 100ms here
*/
queue_delayed_work(rtlpriv->works.rtl_wq,
&rtlpriv->works.ips_nic_off_wq, MSECS(100));
}
/* NOTICE: any opmode should exc nic_on, or disable without
* nic_on may something wrong, like adhoc TP
*/
void rtl_ips_nic_on(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
enum rf_pwrstate rtstate;
cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
spin_lock(&rtlpriv->locks.ips_lock);
if (ppsc->inactiveps) {
rtstate = ppsc->rfpwr_state;
if (rtstate != ERFON &&
!ppsc->swrf_processing &&
ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
ppsc->inactive_pwrstate = ERFON;
ppsc->in_powersavemode = false;
_rtl_ps_inactive_ps(hw);
/* call after RF on */
if (rtlpriv->cfg->ops->get_btc_status())
rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
ppsc->inactive_pwrstate);
}
}
spin_unlock(&rtlpriv->locks.ips_lock);
}
EXPORT_SYMBOL_GPL(rtl_ips_nic_on);
/*for FW LPS*/
/*
*Determine if we can set Fw into PS mode
*in current condition.Return TRUE if it
*can enter PS mode.
*/
static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
u32 ps_timediff;
ps_timediff = jiffies_to_msecs(jiffies -
ppsc->last_delaylps_stamp_jiffies);
if (ps_timediff < 2000) {
RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
"Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
return false;
}
if (mac->link_state != MAC80211_LINKED)
return false;
if (mac->opmode == NL80211_IFTYPE_ADHOC)
return false;
return true;
}
/* Change current and default preamble mode.*/
void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
bool enter_fwlps;
if (mac->opmode == NL80211_IFTYPE_ADHOC)
return;
if (mac->link_state != MAC80211_LINKED)
return;
if (ppsc->dot11_psmode == rt_psmode && rt_psmode == EACTIVE)
return;
/* Update power save mode configured. */
ppsc->dot11_psmode = rt_psmode;
/*
*<FW control LPS>
*1. Enter PS mode
* Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
* cmd to set Fw into PS mode.
*2. Leave PS mode
* Send H2C fw_pwrmode cmd to Fw to set Fw into Active
* mode and set RPWM to turn RF on.
*/
if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
if (ppsc->dot11_psmode == EACTIVE) {
RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
"FW LPS leave ps_mode:%x\n",
FW_PS_ACTIVE_MODE);
enter_fwlps = false;
ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
ppsc->smart_ps = 0;
rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
(u8 *)(&enter_fwlps));
if (ppsc->p2p_ps_info.opp_ps)
rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE);
if (rtlpriv->cfg->ops->get_btc_status())
rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
} else {
if (rtl_get_fwlps_doze(hw)) {
RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
"FW LPS enter ps_mode:%x\n",
ppsc->fwctrl_psmode);
if (rtlpriv->cfg->ops->get_btc_status())
rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
enter_fwlps = true;
ppsc->pwr_mode = ppsc->fwctrl_psmode;
ppsc->smart_ps = 2;
rtlpriv->cfg->ops->set_hw_reg(hw,
HW_VAR_FW_LPS_ACTION,
(u8 *)(&enter_fwlps));
} else {
/* Reset the power save related parameters. */
ppsc->dot11_psmode = EACTIVE;
}
}
}
}
/* Interrupt safe routine to enter the leisure power save mode.*/
static void rtl_lps_enter_core(struct ieee80211_hw *hw)
{
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
struct rtl_priv *rtlpriv = rtl_priv(hw);
unsigned long flag;
if (!ppsc->fwctrl_lps)
return;
if (rtlpriv->sec.being_setkey)
return;
if (rtlpriv->link_info.busytraffic)
return;
/*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
if (mac->cnt_after_linked < 5)
return;
if (mac->opmode == NL80211_IFTYPE_ADHOC)
return;
if (mac->link_state != MAC80211_LINKED)
return;
spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
/* Don't need to check (ppsc->dot11_psmode == EACTIVE), because
* bt_ccoexist may ask to enter lps.
* In normal case, this constraint move to rtl_lps_set_psmode().
*/
RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
"Enter 802.11 power save mode...\n");
rtl_lps_set_psmode(hw, EAUTOPS);
spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
}
/* Interrupt safe routine to leave the leisure power save mode.*/
static void rtl_lps_leave_core(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
unsigned long flag;
spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
if (ppsc->fwctrl_lps) {
if (ppsc->dot11_psmode != EACTIVE) {
/*FIX ME */
/*rtlpriv->cfg->ops->enable_interrupt(hw); */
if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
rtlhal->interface == INTF_PCI) {
rtlpriv->intf_ops->disable_aspm(hw);
RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
}
RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
"Busy Traffic,Leave 802.11 power save..\n");
rtl_lps_set_psmode(hw, EACTIVE);
}
}
spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
}
/* For sw LPS*/
void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct ieee80211_hdr *hdr = data;
struct ieee80211_tim_ie *tim_ie;
u8 *tim;
u8 tim_len;
bool u_buffed;
bool m_buffed;
if (mac->opmode != NL80211_IFTYPE_STATION)
return;
if (!rtlpriv->psc.swctrl_lps)
return;
if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
return;
if (!rtlpriv->psc.sw_ps_enabled)
return;
if (rtlpriv->psc.fwctrl_lps)
return;
if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
return;
/* check if this really is a beacon */
if (!ieee80211_is_beacon(hdr->frame_control))
return;
/* min. beacon length + FCS_LEN */
if (len <= 40 + FCS_LEN)
return;
/* and only beacons from the associated BSSID, please */
if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
return;
rtlpriv->psc.last_beacon = jiffies;
tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
if (!tim)
return;
if (tim[1] < sizeof(*tim_ie))
return;
tim_len = tim[1];
tim_ie = (struct ieee80211_tim_ie *) &tim[2];
if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
/* Check whenever the PHY can be turned off again. */
/* 1. What about buffered unicast traffic for our AID? */
u_buffed = ieee80211_check_tim(tim_ie, tim_len,
rtlpriv->mac80211.assoc_id);
/* 2. Maybe the AP wants to send multicast/broadcast data? */
m_buffed = tim_ie->bitmap_ctrl & 0x01;
rtlpriv->psc.multi_buffered = m_buffed;
/* unicast will process by mac80211 through
* set ~IEEE80211_CONF_PS, So we just check
* multicast frames here */
if (!m_buffed) {
/* back to low-power land. and delay is
* prevent null power save frame tx fail */
queue_delayed_work(rtlpriv->works.rtl_wq,
&rtlpriv->works.ps_work, MSECS(5));
} else {
RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
"u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
}
}
EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
unsigned long flag;
if (!rtlpriv->psc.swctrl_lps)
return;
if (mac->link_state != MAC80211_LINKED)
return;
if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
rtlpriv->intf_ops->disable_aspm(hw);
RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
}
spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
}
void rtl_swlps_rfon_wq_callback(void *data)
{
struct rtl_works *rtlworks =
container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
struct ieee80211_hw *hw = rtlworks->hw;
rtl_swlps_rf_awake(hw);
}
void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
unsigned long flag;
u8 sleep_intv;
if (!rtlpriv->psc.sw_ps_enabled)
return;
if ((rtlpriv->sec.being_setkey) ||
(mac->opmode == NL80211_IFTYPE_ADHOC))
return;
/*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
return;
if (rtlpriv->link_info.busytraffic)
return;
spin_lock(&rtlpriv->locks.rf_ps_lock);
if (rtlpriv->psc.rfchange_inprogress) {
spin_unlock(&rtlpriv->locks.rf_ps_lock);
return;
}
spin_unlock(&rtlpriv->locks.rf_ps_lock);
spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
!RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
rtlpriv->intf_ops->enable_aspm(hw);
RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
}
/* here is power save alg, when this beacon is DTIM
* we will set sleep time to dtim_period * n;
* when this beacon is not DTIM, we will set sleep
* time to sleep_intv = rtlpriv->psc.dtim_counter or
* MAX_SW_LPS_SLEEP_INTV(default set to 5) */
if (rtlpriv->psc.dtim_counter == 0) {
if (hw->conf.ps_dtim_period == 1)
sleep_intv = hw->conf.ps_dtim_period * 2;
else
sleep_intv = hw->conf.ps_dtim_period;
} else {
sleep_intv = rtlpriv->psc.dtim_counter;
}
if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
sleep_intv = MAX_SW_LPS_SLEEP_INTV;
/* this print should always be dtim_conter = 0 &
* sleep = dtim_period, that meaons, we should
* awake before every dtim */
RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
"dtim_counter:%x will sleep :%d beacon_intv\n",
rtlpriv->psc.dtim_counter, sleep_intv);
/* we tested that 40ms is enough for sw & hw sw delay */
queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
}
void rtl_lps_change_work_callback(struct work_struct *work)
{
struct rtl_works *rtlworks =
container_of(work, struct rtl_works, lps_change_work);
struct ieee80211_hw *hw = rtlworks->hw;
struct rtl_priv *rtlpriv = rtl_priv(hw);
if (rtlpriv->enter_ps)
rtl_lps_enter_core(hw);
else
rtl_lps_leave_core(hw);
}
EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
void rtl_lps_enter(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
if (!in_interrupt())
return rtl_lps_enter_core(hw);
rtlpriv->enter_ps = true;
schedule_work(&rtlpriv->works.lps_change_work);
}
EXPORT_SYMBOL_GPL(rtl_lps_enter);
void rtl_lps_leave(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
if (!in_interrupt())
return rtl_lps_leave_core(hw);
rtlpriv->enter_ps = false;
schedule_work(&rtlpriv->works.lps_change_work);
}
EXPORT_SYMBOL_GPL(rtl_lps_leave);
void rtl_swlps_wq_callback(void *data)
{
struct rtl_works *rtlworks = container_of_dwork_rtl(data,
struct rtl_works,
ps_work);
struct ieee80211_hw *hw = rtlworks->hw;
struct rtl_priv *rtlpriv = rtl_priv(hw);
bool ps = false;
ps = (hw->conf.flags & IEEE80211_CONF_PS);
/* we can sleep after ps null send ok */
if (rtlpriv->psc.state_inap) {
rtl_swlps_rf_sleep(hw);
if (rtlpriv->psc.state && !ps) {
rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
rtlpriv->psc.last_action);
}
if (ps)
rtlpriv->psc.last_slept = jiffies;
rtlpriv->psc.last_action = jiffies;
rtlpriv->psc.state = ps;
}
}
static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
unsigned int len)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct ieee80211_mgmt *mgmt = data;
struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
u8 *pos, *end, *ie;
u16 noa_len;
static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
u8 noa_num, index , i, noa_index = 0;
bool find_p2p_ie = false , find_p2p_ps_ie = false;
pos = (u8 *)mgmt->u.beacon.variable;
end = data + len;
ie = NULL;
while (pos + 1 < end) {
if (pos + 2 + pos[1] > end)
return;
if (pos[0] == 221 && pos[1] > 4) {
if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
ie = pos + 2+4;
break;
}
}
pos += 2 + pos[1];
}
if (ie == NULL)
return;
find_p2p_ie = true;
/*to find noa ie*/
while (ie + 1 < end) {
noa_len = READEF2BYTE((__le16 *)&ie[1]);
if (ie + 3 + ie[1] > end)
return;
if (ie[0] == 12) {
find_p2p_ps_ie = true;
if ((noa_len - 2) % 13 != 0) {
RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
"P2P notice of absence: invalid length.%d\n",
noa_len);
return;
} else {
noa_num = (noa_len - 2) / 13;
}
noa_index = ie[3];
if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
"update NOA ie.\n");
p2pinfo->noa_index = noa_index;
p2pinfo->opp_ps = (ie[4] >> 7);
p2pinfo->ctwindow = ie[4] & 0x7F;
p2pinfo->noa_num = noa_num;
index = 5;
for (i = 0; i < noa_num; i++) {
p2pinfo->noa_count_type[i] =
READEF1BYTE(ie+index);
index += 1;
p2pinfo->noa_duration[i] =
READEF4BYTE((__le32 *)ie+index);
index += 4;
p2pinfo->noa_interval[i] =
READEF4BYTE((__le32 *)ie+index);
index += 4;
p2pinfo->noa_start_time[i] =
READEF4BYTE((__le32 *)ie+index);
index += 4;
}
if (p2pinfo->opp_ps == 1) {
p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
/* Driver should wait LPS entering
* CTWindow
*/
if (rtlpriv->psc.fw_current_inpsmode)
rtl_p2p_ps_cmd(hw,
P2P_PS_ENABLE);
} else if (p2pinfo->noa_num > 0) {
p2pinfo->p2p_ps_mode = P2P_PS_NOA;
rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
} else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
}
}
break;
}
ie += 3 + noa_len;
}
if (find_p2p_ie == true) {
if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
(find_p2p_ps_ie == false))
rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
}
}
static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
unsigned int len)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct ieee80211_mgmt *mgmt = data;
struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
u8 noa_num, index , i , noa_index = 0;
u8 *pos, *end, *ie;
u16 noa_len;
static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
pos = (u8 *)&mgmt->u.action.category;
end = data + len;
ie = NULL;
if (pos[0] == 0x7f) {
if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
ie = pos + 3+4;
}
if (ie == NULL)
return;
RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
/*to find noa ie*/
while (ie + 1 < end) {
noa_len = READEF2BYTE((__le16 *)&ie[1]);
if (ie + 3 + ie[1] > end)
return;
if (ie[0] == 12) {
RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
ie, noa_len);
if ((noa_len - 2) % 13 != 0) {
RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
"P2P notice of absence: invalid length.%d\n",
noa_len);
return;
} else {
noa_num = (noa_len - 2) / 13;
}
noa_index = ie[3];
if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
p2pinfo->noa_index = noa_index;
p2pinfo->opp_ps = (ie[4] >> 7);
p2pinfo->ctwindow = ie[4] & 0x7F;
p2pinfo->noa_num = noa_num;
index = 5;
for (i = 0; i < noa_num; i++) {
p2pinfo->noa_count_type[i] =
READEF1BYTE(ie+index);
index += 1;
p2pinfo->noa_duration[i] =
READEF4BYTE((__le32 *)ie+index);
index += 4;
p2pinfo->noa_interval[i] =
READEF4BYTE((__le32 *)ie+index);
index += 4;
p2pinfo->noa_start_time[i] =
READEF4BYTE((__le32 *)ie+index);
index += 4;
}
if (p2pinfo->opp_ps == 1) {
p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
/* Driver should wait LPS entering
* CTWindow
*/
if (rtlpriv->psc.fw_current_inpsmode)
rtl_p2p_ps_cmd(hw,
P2P_PS_ENABLE);
} else if (p2pinfo->noa_num > 0) {
p2pinfo->p2p_ps_mode = P2P_PS_NOA;
rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
} else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
}
}
break;
}
ie += 3 + noa_len;
}
}
void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n" , p2p_ps_state);
switch (p2p_ps_state) {
case P2P_PS_DISABLE:
p2pinfo->p2p_ps_state = p2p_ps_state;
rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
&p2p_ps_state);
p2pinfo->noa_index = 0;
p2pinfo->ctwindow = 0;
p2pinfo->opp_ps = 0;
p2pinfo->noa_num = 0;
p2pinfo->p2p_ps_mode = P2P_PS_NONE;
if (rtlps->fw_current_inpsmode) {
if (rtlps->smart_ps == 0) {
rtlps->smart_ps = 2;
rtlpriv->cfg->ops->set_hw_reg(hw,
HW_VAR_H2C_FW_PWRMODE,
&rtlps->pwr_mode);
}
}
break;
case P2P_PS_ENABLE:
if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
p2pinfo->p2p_ps_state = p2p_ps_state;
if (p2pinfo->ctwindow > 0) {
if (rtlps->smart_ps != 0) {
rtlps->smart_ps = 0;
rtlpriv->cfg->ops->set_hw_reg(hw,
HW_VAR_H2C_FW_PWRMODE,
&rtlps->pwr_mode);
}
}
rtlpriv->cfg->ops->set_hw_reg(hw,
HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
&p2p_ps_state);
}
break;
case P2P_PS_SCAN:
case P2P_PS_SCAN_DONE:
case P2P_PS_ALLSTASLEEP:
if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
p2pinfo->p2p_ps_state = p2p_ps_state;
rtlpriv->cfg->ops->set_hw_reg(hw,
HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
&p2p_ps_state);
}
break;
default:
break;
}
RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
"ctwindow %x oppps %x\n",
p2pinfo->ctwindow , p2pinfo->opp_ps);
RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
"count %x duration %x index %x interval %x start time %x noa num %x\n",
p2pinfo->noa_count_type[0],
p2pinfo->noa_duration[0],
p2pinfo->noa_index,
p2pinfo->noa_interval[0],
p2pinfo->noa_start_time[0],
p2pinfo->noa_num);
RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
}
void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct ieee80211_hdr *hdr = data;
if (!mac->p2p)
return;
if (mac->link_state != MAC80211_LINKED)
return;
/* min. beacon length + FCS_LEN */
if (len <= 40 + FCS_LEN)
return;
/* and only beacons from the associated BSSID, please */
if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
return;
/* check if this really is a beacon */
if (!(ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control) ||
ieee80211_is_action(hdr->frame_control)))
return;
if (ieee80211_is_action(hdr->frame_control))
rtl_p2p_action_ie(hw , data , len - FCS_LEN);
else
rtl_p2p_noa_ie(hw , data , len - FCS_LEN);
}
EXPORT_SYMBOL_GPL(rtl_p2p_info);
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