drivers/staging/rtlwifi/base.c

// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
 *
 * Copyright(c) 2009-2012  Realtek Corporation.
 *
 * 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 "rc.h"
#include "base.h"
#include "efuse.h"
#include "cam.h"
#include "ps.h"
#include "regd.h"
#include "pci.h"
#include <linux/ip.h>
#include <linux/module.h>
#include <linux/udp.h>

/*
 *NOTICE!!!: This file will be very big, we should
 *keep it clear under following roles:
 *
 *This file include following parts, so, if you add new
 *functions into this file, please check which part it
 *should includes. or check if you should add new part
 *for this file:
 *
 *1) mac80211 init functions
 *2) tx information functions
 *3) functions called by core.c
 *4) wq & timer callback functions
 *5) frame process functions
 *6) IOT functions
 *7) sysfs functions
 *8) vif functions
 *9) ...
 */

/*********************************************************
 *
 * mac80211 init functions
 *
 *********************************************************/
static struct ieee80211_channel rtl_channeltable_2g[] = {
	{.center_freq = 2412, .hw_value = 1,},
	{.center_freq = 2417, .hw_value = 2,},
	{.center_freq = 2422, .hw_value = 3,},
	{.center_freq = 2427, .hw_value = 4,},
	{.center_freq = 2432, .hw_value = 5,},
	{.center_freq = 2437, .hw_value = 6,},
	{.center_freq = 2442, .hw_value = 7,},
	{.center_freq = 2447, .hw_value = 8,},
	{.center_freq = 2452, .hw_value = 9,},
	{.center_freq = 2457, .hw_value = 10,},
	{.center_freq = 2462, .hw_value = 11,},
	{.center_freq = 2467, .hw_value = 12,},
	{.center_freq = 2472, .hw_value = 13,},
	{.center_freq = 2484, .hw_value = 14,},
};

static struct ieee80211_channel rtl_channeltable_5g[] = {
	{.center_freq = 5180, .hw_value = 36,},
	{.center_freq = 5200, .hw_value = 40,},
	{.center_freq = 5220, .hw_value = 44,},
	{.center_freq = 5240, .hw_value = 48,},
	{.center_freq = 5260, .hw_value = 52,},
	{.center_freq = 5280, .hw_value = 56,},
	{.center_freq = 5300, .hw_value = 60,},
	{.center_freq = 5320, .hw_value = 64,},
	{.center_freq = 5500, .hw_value = 100,},
	{.center_freq = 5520, .hw_value = 104,},
	{.center_freq = 5540, .hw_value = 108,},
	{.center_freq = 5560, .hw_value = 112,},
	{.center_freq = 5580, .hw_value = 116,},
	{.center_freq = 5600, .hw_value = 120,},
	{.center_freq = 5620, .hw_value = 124,},
	{.center_freq = 5640, .hw_value = 128,},
	{.center_freq = 5660, .hw_value = 132,},
	{.center_freq = 5680, .hw_value = 136,},
	{.center_freq = 5700, .hw_value = 140,},
	{.center_freq = 5745, .hw_value = 149,},
	{.center_freq = 5765, .hw_value = 153,},
	{.center_freq = 5785, .hw_value = 157,},
	{.center_freq = 5805, .hw_value = 161,},
	{.center_freq = 5825, .hw_value = 165,},
};

static struct ieee80211_rate rtl_ratetable_2g[] = {
	{.bitrate = 10, .hw_value = 0x00,},
	{.bitrate = 20, .hw_value = 0x01,},
	{.bitrate = 55, .hw_value = 0x02,},
	{.bitrate = 110, .hw_value = 0x03,},
	{.bitrate = 60, .hw_value = 0x04,},
	{.bitrate = 90, .hw_value = 0x05,},
	{.bitrate = 120, .hw_value = 0x06,},
	{.bitrate = 180, .hw_value = 0x07,},
	{.bitrate = 240, .hw_value = 0x08,},
	{.bitrate = 360, .hw_value = 0x09,},
	{.bitrate = 480, .hw_value = 0x0a,},
	{.bitrate = 540, .hw_value = 0x0b,},
};

static struct ieee80211_rate rtl_ratetable_5g[] = {
	{.bitrate = 60, .hw_value = 0x04,},
	{.bitrate = 90, .hw_value = 0x05,},
	{.bitrate = 120, .hw_value = 0x06,},
	{.bitrate = 180, .hw_value = 0x07,},
	{.bitrate = 240, .hw_value = 0x08,},
	{.bitrate = 360, .hw_value = 0x09,},
	{.bitrate = 480, .hw_value = 0x0a,},
	{.bitrate = 540, .hw_value = 0x0b,},
};

static const struct ieee80211_supported_band rtl_band_2ghz = {
	.band = NL80211_BAND_2GHZ,

	.channels = rtl_channeltable_2g,
	.n_channels = ARRAY_SIZE(rtl_channeltable_2g),

	.bitrates = rtl_ratetable_2g,
	.n_bitrates = ARRAY_SIZE(rtl_ratetable_2g),

	.ht_cap = {0},
};

static struct ieee80211_supported_band rtl_band_5ghz = {
	.band = NL80211_BAND_5GHZ,

	.channels = rtl_channeltable_5g,
	.n_channels = ARRAY_SIZE(rtl_channeltable_5g),

	.bitrates = rtl_ratetable_5g,
	.n_bitrates = ARRAY_SIZE(rtl_ratetable_5g),

	.ht_cap = {0},
};

static const u8 tid_to_ac[] = {
	2, /* IEEE80211_AC_BE */
	3, /* IEEE80211_AC_BK */
	3, /* IEEE80211_AC_BK */
	2, /* IEEE80211_AC_BE */
	1, /* IEEE80211_AC_VI */
	1, /* IEEE80211_AC_VI */
	0, /* IEEE80211_AC_VO */
	0, /* IEEE80211_AC_VO */
};

u8 rtl_tid_to_ac(u8 tid)
{
	return tid_to_ac[tid];
}

static void _rtl_init_hw_ht_capab(struct ieee80211_hw *hw,
				  struct ieee80211_sta_ht_cap *ht_cap)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_phy *rtlphy = &rtlpriv->phy;

	ht_cap->ht_supported = true;
	ht_cap->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
	    IEEE80211_HT_CAP_SGI_40 |
	    IEEE80211_HT_CAP_SGI_20 |
	    IEEE80211_HT_CAP_DSSSCCK40 | IEEE80211_HT_CAP_MAX_AMSDU;

	if (rtlpriv->rtlhal.disable_amsdu_8k)
		ht_cap->cap &= ~IEEE80211_HT_CAP_MAX_AMSDU;

	/*
	 *Maximum length of AMPDU that the STA can receive.
	 *Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
	 */
	ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;

	/*Minimum MPDU start spacing , */
	ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_16;

	ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;

	/*hw->wiphy->bands[NL80211_BAND_2GHZ]
	 *base on ant_num
	 *rx_mask: RX mask
	 *if rx_ant = 1 rx_mask[0]= 0xff;==>MCS0-MCS7
	 *if rx_ant = 2 rx_mask[1]= 0xff;==>MCS8-MCS15
	 *if rx_ant >= 3 rx_mask[2]= 0xff;
	 *if BW_40 rx_mask[4]= 0x01;
	 *highest supported RX rate
	 */
	if (rtlpriv->dm.supp_phymode_switch) {
		pr_info("Support phy mode switch\n");

		ht_cap->mcs.rx_mask[0] = 0xFF;
		ht_cap->mcs.rx_mask[1] = 0xFF;
		ht_cap->mcs.rx_mask[4] = 0x01;

		ht_cap->mcs.rx_highest = cpu_to_le16(MAX_BIT_RATE_40MHZ_MCS15);
	} else {
		if (get_rf_type(rtlphy) == RF_1T2R ||
		    get_rf_type(rtlphy) == RF_2T2R) {
			RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
				 "1T2R or 2T2R\n");
			ht_cap->mcs.rx_mask[0] = 0xFF;
			ht_cap->mcs.rx_mask[1] = 0xFF;
			ht_cap->mcs.rx_mask[4] = 0x01;

			ht_cap->mcs.rx_highest =
				 cpu_to_le16(MAX_BIT_RATE_40MHZ_MCS15);
		} else if (get_rf_type(rtlphy) == RF_1T1R) {
			RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "1T1R\n");

			ht_cap->mcs.rx_mask[0] = 0xFF;
			ht_cap->mcs.rx_mask[1] = 0x00;
			ht_cap->mcs.rx_mask[4] = 0x01;

			ht_cap->mcs.rx_highest =
				 cpu_to_le16(MAX_BIT_RATE_40MHZ_MCS7);
		}
	}
}

static void _rtl_init_hw_vht_capab(struct ieee80211_hw *hw,
				   struct ieee80211_sta_vht_cap *vht_cap)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtlpriv);

	if (rtlhal->hw_type == HARDWARE_TYPE_RTL8812AE ||
	    rtlhal->hw_type == HARDWARE_TYPE_RTL8822BE) {
		u16 mcs_map;

		vht_cap->vht_supported = true;
		vht_cap->cap =
			IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
			IEEE80211_VHT_CAP_SHORT_GI_80 |
			IEEE80211_VHT_CAP_TXSTBC |
			IEEE80211_VHT_CAP_RXSTBC_1 |
			IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
			IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
			IEEE80211_VHT_CAP_HTC_VHT |
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
			IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
			IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
			0;

		mcs_map = IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
			IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 4 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 6 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 8 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 10 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 12 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 14;

		vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map);
		vht_cap->vht_mcs.rx_highest =
			cpu_to_le16(MAX_BIT_RATE_SHORT_GI_2NSS_80MHZ_MCS9);
		vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map);
		vht_cap->vht_mcs.tx_highest =
			cpu_to_le16(MAX_BIT_RATE_SHORT_GI_2NSS_80MHZ_MCS9);
	} else if (rtlhal->hw_type == HARDWARE_TYPE_RTL8821AE) {
		u16 mcs_map;

		vht_cap->vht_supported = true;
		vht_cap->cap =
			IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
			IEEE80211_VHT_CAP_SHORT_GI_80 |
			IEEE80211_VHT_CAP_TXSTBC |
			IEEE80211_VHT_CAP_RXSTBC_1 |
			IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
			IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
			IEEE80211_VHT_CAP_HTC_VHT |
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
			IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
			IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
			0;

		mcs_map = IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 2 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 4 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 6 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 8 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 10 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 12 |
			IEEE80211_VHT_MCS_NOT_SUPPORTED << 14;

		vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map);
		vht_cap->vht_mcs.rx_highest =
			cpu_to_le16(MAX_BIT_RATE_SHORT_GI_1NSS_80MHZ_MCS9);
		vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map);
		vht_cap->vht_mcs.tx_highest =
			cpu_to_le16(MAX_BIT_RATE_SHORT_GI_1NSS_80MHZ_MCS9);
	}
}

static void _rtl_init_mac80211(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
	struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
	struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
	struct ieee80211_supported_band *sband;

	if (rtlhal->macphymode == SINGLEMAC_SINGLEPHY &&
	    rtlhal->bandset == BAND_ON_BOTH) {
		/* 1: 2.4 G bands */
		/* <1> use  mac->bands as mem for hw->wiphy->bands */
		sband = &rtlmac->bands[NL80211_BAND_2GHZ];

		/* <2> set hw->wiphy->bands[NL80211_BAND_2GHZ]
		 * to default value(1T1R)
		 */
		memcpy(&rtlmac->bands[NL80211_BAND_2GHZ], &rtl_band_2ghz,
		       sizeof(struct ieee80211_supported_band));

		/* <3> init ht cap base on ant_num */
		_rtl_init_hw_ht_capab(hw, &sband->ht_cap);

		/* <4> set mac->sband to wiphy->sband */
		hw->wiphy->bands[NL80211_BAND_2GHZ] = sband;

		/* 2: 5 G bands */
		/* <1> use  mac->bands as mem for hw->wiphy->bands */
		sband = &rtlmac->bands[NL80211_BAND_5GHZ];

		/* <2> set hw->wiphy->bands[NL80211_BAND_5GHZ]
		 * to default value(1T1R)
		 */
		memcpy(&rtlmac->bands[NL80211_BAND_5GHZ], &rtl_band_5ghz,
		       sizeof(struct ieee80211_supported_band));

		/* <3> init ht cap base on ant_num */
		_rtl_init_hw_ht_capab(hw, &sband->ht_cap);

		_rtl_init_hw_vht_capab(hw, &sband->vht_cap);
		/* <4> set mac->sband to wiphy->sband */
		hw->wiphy->bands[NL80211_BAND_5GHZ] = sband;
	} else {
		if (rtlhal->current_bandtype == BAND_ON_2_4G) {
			/* <1> use  mac->bands as mem for hw->wiphy->bands */
			sband = &rtlmac->bands[NL80211_BAND_2GHZ];

			/* <2> set hw->wiphy->bands[NL80211_BAND_2GHZ]
			 * to default value(1T1R)
			 */
			memcpy(&rtlmac->bands[NL80211_BAND_2GHZ],
			       &rtl_band_2ghz,
			       sizeof(struct ieee80211_supported_band));

			/* <3> init ht cap base on ant_num */
			_rtl_init_hw_ht_capab(hw, &sband->ht_cap);

			/* <4> set mac->sband to wiphy->sband */
			hw->wiphy->bands[NL80211_BAND_2GHZ] = sband;
		} else if (rtlhal->current_bandtype == BAND_ON_5G) {
			/* <1> use  mac->bands as mem for hw->wiphy->bands */
			sband = &rtlmac->bands[NL80211_BAND_5GHZ];

			/* <2> set hw->wiphy->bands[NL80211_BAND_5GHZ]
			 * to default value(1T1R)
			 */
			memcpy(&rtlmac->bands[NL80211_BAND_5GHZ],
			       &rtl_band_5ghz,
			       sizeof(struct ieee80211_supported_band));

			/* <3> init ht cap base on ant_num */
			_rtl_init_hw_ht_capab(hw, &sband->ht_cap);

			_rtl_init_hw_vht_capab(hw, &sband->vht_cap);
			/* <4> set mac->sband to wiphy->sband */
			hw->wiphy->bands[NL80211_BAND_5GHZ] = sband;
		} else {
			pr_err("Err BAND %d\n",
			       rtlhal->current_bandtype);
		}
	}
	/* <5> set hw caps */
	ieee80211_hw_set(hw, SIGNAL_DBM);
	ieee80211_hw_set(hw, RX_INCLUDES_FCS);
	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
	ieee80211_hw_set(hw, CONNECTION_MONITOR);
	ieee80211_hw_set(hw, MFP_CAPABLE);
	ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
	ieee80211_hw_set(hw, SUPPORTS_TX_FRAG);
	ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
	ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);

	/* swlps or hwlps has been set in diff chip in init_sw_vars */
	if (rtlpriv->psc.swctrl_lps) {
		ieee80211_hw_set(hw, SUPPORTS_PS);
		ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
	}
	if (rtlpriv->psc.fwctrl_lps) {
		ieee80211_hw_set(hw, SUPPORTS_PS);
		ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
	}
	hw->wiphy->interface_modes =
	    BIT(NL80211_IFTYPE_AP) |
	    BIT(NL80211_IFTYPE_STATION) |
	    BIT(NL80211_IFTYPE_ADHOC) |
	    BIT(NL80211_IFTYPE_MESH_POINT) |
	    BIT(NL80211_IFTYPE_P2P_CLIENT) |
	    BIT(NL80211_IFTYPE_P2P_GO);
	hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;

	hw->wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;

	hw->wiphy->rts_threshold = 2347;

	hw->queues = AC_MAX;
	hw->extra_tx_headroom = RTL_TX_HEADER_SIZE;

	/* TODO: Correct this value for our hw */
	hw->max_listen_interval = MAX_LISTEN_INTERVAL;
	hw->max_rate_tries = MAX_RATE_TRIES;
	/* hw->max_rates = 1; */
	hw->sta_data_size = sizeof(struct rtl_sta_info);

/* wowlan is not supported by kernel if CONFIG_PM is not defined */
#ifdef CONFIG_PM
	if (rtlpriv->psc.wo_wlan_mode) {
		if (rtlpriv->psc.wo_wlan_mode & WAKE_ON_MAGIC_PACKET)
			rtlpriv->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT;
		if (rtlpriv->psc.wo_wlan_mode & WAKE_ON_PATTERN_MATCH) {
			rtlpriv->wowlan.n_patterns =
				MAX_SUPPORT_WOL_PATTERN_NUM;
			rtlpriv->wowlan.pattern_min_len = MIN_WOL_PATTERN_SIZE;
			rtlpriv->wowlan.pattern_max_len = MAX_WOL_PATTERN_SIZE;
		}
		hw->wiphy->wowlan = &rtlpriv->wowlan;
	}
#endif

	/* <6> mac address */
	if (is_valid_ether_addr(rtlefuse->dev_addr)) {
		SET_IEEE80211_PERM_ADDR(hw, rtlefuse->dev_addr);
	} else {
		u8 rtlmac1[] = { 0x00, 0xe0, 0x4c, 0x81, 0x92, 0x00 };

		get_random_bytes((rtlmac1 + (ETH_ALEN - 1)), 1);
		SET_IEEE80211_PERM_ADDR(hw, rtlmac1);
	}
}

static void _rtl_init_deferred_work(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	/* <1> timer */
	timer_setup(&rtlpriv->works.watchdog_timer,
		    rtl_watch_dog_timer_callback, 0);
	timer_setup(&rtlpriv->works.dualmac_easyconcurrent_retrytimer,
		    rtl_easy_concurrent_retrytimer_callback, 0);
	/* <2> work queue */
	rtlpriv->works.hw = hw;
	rtlpriv->works.rtl_wq = alloc_workqueue("%s", 0, 0, rtlpriv->cfg->name);
	INIT_DELAYED_WORK(&rtlpriv->works.watchdog_wq,
			  (void *)rtl_watchdog_wq_callback);
	INIT_DELAYED_WORK(&rtlpriv->works.ips_nic_off_wq,
			  (void *)rtl_ips_nic_off_wq_callback);
	INIT_DELAYED_WORK(&rtlpriv->works.ps_work,
			  (void *)rtl_swlps_wq_callback);
	INIT_DELAYED_WORK(&rtlpriv->works.ps_rfon_wq,
			  (void *)rtl_swlps_rfon_wq_callback);
	INIT_DELAYED_WORK(&rtlpriv->works.fwevt_wq,
			  (void *)rtl_fwevt_wq_callback);
	INIT_DELAYED_WORK(&rtlpriv->works.c2hcmd_wq,
			  (void *)rtl_c2hcmd_wq_callback);
}

void rtl_deinit_deferred_work(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	del_timer_sync(&rtlpriv->works.watchdog_timer);

	cancel_delayed_work(&rtlpriv->works.watchdog_wq);
	cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
	cancel_delayed_work(&rtlpriv->works.ps_work);
	cancel_delayed_work(&rtlpriv->works.ps_rfon_wq);
	cancel_delayed_work(&rtlpriv->works.fwevt_wq);
	cancel_delayed_work(&rtlpriv->works.c2hcmd_wq);
}

void rtl_init_rfkill(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	bool radio_state;
	bool blocked;
	u8 valid = 0;

	/*set init state to on */
	rtlpriv->rfkill.rfkill_state = true;
	wiphy_rfkill_set_hw_state(hw->wiphy, 0);

	radio_state = rtlpriv->cfg->ops->radio_onoff_checking(hw, &valid);

	if (valid) {
		pr_info("rtlwifi: wireless switch is %s\n",
			rtlpriv->rfkill.rfkill_state ? "on" : "off");

		rtlpriv->rfkill.rfkill_state = radio_state;

		blocked = (rtlpriv->rfkill.rfkill_state == 1) ? 0 : 1;
		wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
	}

	wiphy_rfkill_start_polling(hw->wiphy);
}

void rtl_deinit_rfkill(struct ieee80211_hw *hw)
{
	wiphy_rfkill_stop_polling(hw->wiphy);
}

int rtl_init_core(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));

	/* <1> init mac80211 */
	_rtl_init_mac80211(hw);
	rtlmac->hw = hw;

	/* <2> rate control register */
	hw->rate_control_algorithm = "rtl_rc";

	/*
	 * <3> init CRDA must come after init
	 * mac80211 hw  in _rtl_init_mac80211.
	 */
	if (rtl_regd_init(hw, rtl_reg_notifier)) {
		pr_err("REGD init failed\n");
		return 1;
	}

	/* <4> locks */
	mutex_init(&rtlpriv->locks.conf_mutex);
	mutex_init(&rtlpriv->locks.ips_mutex);
	mutex_init(&rtlpriv->locks.lps_mutex);
	spin_lock_init(&rtlpriv->locks.irq_th_lock);
	spin_lock_init(&rtlpriv->locks.h2c_lock);
	spin_lock_init(&rtlpriv->locks.rf_ps_lock);
	spin_lock_init(&rtlpriv->locks.rf_lock);
	spin_lock_init(&rtlpriv->locks.waitq_lock);
	spin_lock_init(&rtlpriv->locks.entry_list_lock);
	spin_lock_init(&rtlpriv->locks.c2hcmd_lock);
	spin_lock_init(&rtlpriv->locks.scan_list_lock);
	spin_lock_init(&rtlpriv->locks.cck_and_rw_pagea_lock);
	spin_lock_init(&rtlpriv->locks.fw_ps_lock);
	spin_lock_init(&rtlpriv->locks.iqk_lock);
	/* <5> init list */
	INIT_LIST_HEAD(&rtlpriv->entry_list);
	INIT_LIST_HEAD(&rtlpriv->c2hcmd_list);
	INIT_LIST_HEAD(&rtlpriv->scan_list.list);

	rtlmac->link_state = MAC80211_NOLINK;

	/* <6> init deferred work */
	_rtl_init_deferred_work(hw);

	return 0;
}

static void rtl_free_entries_from_scan_list(struct ieee80211_hw *hw);

void rtl_deinit_core(struct ieee80211_hw *hw)
{
	rtl_c2hcmd_launcher(hw, 0);
	rtl_free_entries_from_scan_list(hw);
}

void rtl_init_rx_config(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));

	rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *)&mac->rx_conf);
}

/*********************************************************
 *
 * tx information functions
 *
 *********************************************************/
static void _rtl_qurey_shortpreamble_mode(struct ieee80211_hw *hw,
					  struct rtl_tcb_desc *tcb_desc,
					  struct ieee80211_tx_info *info)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	u8 rate_flag = info->control.rates[0].flags;

	tcb_desc->use_shortpreamble = false;

	/* 1M can only use Long Preamble. 11B spec */
	if (tcb_desc->hw_rate == rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M])
		return;
	else if (rate_flag & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
		tcb_desc->use_shortpreamble = true;
}

static void _rtl_query_shortgi(struct ieee80211_hw *hw,
			       struct ieee80211_sta *sta,
			       struct rtl_tcb_desc *tcb_desc,
			       struct ieee80211_tx_info *info)
{
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	u8 rate_flag = info->control.rates[0].flags;
	u8 sgi_40 = 0, sgi_20 = 0, bw_40 = 0;
	u8 sgi_80 = 0, bw_80 = 0;

	tcb_desc->use_shortgi = false;

	if (!sta)
		return;

	sgi_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40;
	sgi_20 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20;
	sgi_80 = sta->vht_cap.cap & IEEE80211_VHT_CAP_SHORT_GI_80;

	if (!sta->ht_cap.ht_supported && !sta->vht_cap.vht_supported)
		return;

	if (!sgi_40 && !sgi_20)
		return;

	if (mac->opmode == NL80211_IFTYPE_STATION) {
		bw_40 = mac->bw_40;
		bw_80 = mac->bw_80;
	} else if (mac->opmode == NL80211_IFTYPE_AP ||
		 mac->opmode == NL80211_IFTYPE_ADHOC ||
		 mac->opmode == NL80211_IFTYPE_MESH_POINT) {
		bw_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
		bw_80 = sta->vht_cap.vht_supported;
	}

	if (bw_80) {
		if (sgi_80)
			tcb_desc->use_shortgi = true;
		else
			tcb_desc->use_shortgi = false;
	} else {
		if (bw_40 && sgi_40)
			tcb_desc->use_shortgi = true;
		else if (!bw_40 && sgi_20)
			tcb_desc->use_shortgi = true;
	}

	if (!(rate_flag & IEEE80211_TX_RC_SHORT_GI))
		tcb_desc->use_shortgi = false;
}

static void _rtl_query_protection_mode(struct ieee80211_hw *hw,
				       struct rtl_tcb_desc *tcb_desc,
				       struct ieee80211_tx_info *info)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	u8 rate_flag = info->control.rates[0].flags;

	/* Common Settings */
	tcb_desc->rts_stbc = false;
	tcb_desc->cts_enable = false;
	tcb_desc->rts_sc = 0;
	tcb_desc->rts_bw = false;
	tcb_desc->rts_use_shortpreamble = false;
	tcb_desc->rts_use_shortgi = false;

	if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
		/* Use CTS-to-SELF in protection mode. */
		tcb_desc->rts_enable = true;
		tcb_desc->cts_enable = true;
		tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
	} else if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
		/* Use RTS-CTS in protection mode. */
		tcb_desc->rts_enable = true;
		tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
	}
}

u8 rtl_mrate_idx_to_arfr_id(struct ieee80211_hw *hw, u8 rate_index,
			    enum wireless_mode wirelessmode)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_phy *rtlphy = &rtlpriv->phy;
	u8 ret = 0;

	switch (rate_index) {
	case RATR_INX_WIRELESS_NGB:
		if (rtlphy->rf_type == RF_1T1R)
			ret = RATEID_IDX_BGN_40M_1SS;
		else
			ret = RATEID_IDX_BGN_40M_2SS;
		break;
	case RATR_INX_WIRELESS_N:
	case RATR_INX_WIRELESS_NG:
		if (rtlphy->rf_type == RF_1T1R)
			ret = RATEID_IDX_GN_N1SS;
		else
			ret = RATEID_IDX_GN_N2SS;
		break;
	case RATR_INX_WIRELESS_NB:
		if (rtlphy->rf_type == RF_1T1R)
			ret = RATEID_IDX_BGN_20M_1SS_BN;
		else
			ret = RATEID_IDX_BGN_20M_2SS_BN;
		break;
	case RATR_INX_WIRELESS_GB:
		ret = RATEID_IDX_BG;
		break;
	case RATR_INX_WIRELESS_G:
		ret = RATEID_IDX_G;
		break;
	case RATR_INX_WIRELESS_B:
		ret = RATEID_IDX_B;
		break;
	case RATR_INX_WIRELESS_MC:
		if (wirelessmode == WIRELESS_MODE_B ||
		    wirelessmode == WIRELESS_MODE_G ||
		    wirelessmode == WIRELESS_MODE_N_24G ||
		    wirelessmode == WIRELESS_MODE_AC_24G)
			ret = RATEID_IDX_BG;
		else
			ret = RATEID_IDX_G;
		break;
	case RATR_INX_WIRELESS_AC_5N:
		if (rtlphy->rf_type == RF_1T1R)
			ret = RATEID_IDX_VHT_1SS;
		else
			ret = RATEID_IDX_VHT_2SS;
		break;
	case RATR_INX_WIRELESS_AC_24N:
		if (rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_80) {
			if (rtlphy->rf_type == RF_1T1R)
				ret = RATEID_IDX_VHT_1SS;
			else
				ret = RATEID_IDX_VHT_2SS;
		} else {
			if (rtlphy->rf_type == RF_1T1R)
				ret = RATEID_IDX_MIX1;
			else
				ret = RATEID_IDX_MIX2;
		}
		break;
	default:
		ret = RATEID_IDX_BGN_40M_2SS;
		break;
	}
	return ret;
}

static inline u8 _rtl_rate_id(struct ieee80211_hw *hw,
			      struct rtl_sta_info *sta_entry,
			      int rate_index)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	if (rtlpriv->cfg->spec_ver & RTL_SPEC_NEW_RATEID) {
		int wireless_mode = sta_entry ?
			sta_entry->wireless_mode : WIRELESS_MODE_G;

		return rtl_mrate_idx_to_arfr_id(hw, rate_index, wireless_mode);
	} else {
		return rate_index;
	}
}

static void _rtl_txrate_selectmode(struct ieee80211_hw *hw,
				   struct ieee80211_sta *sta,
				   struct rtl_tcb_desc *tcb_desc)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_sta_info *sta_entry = NULL;
	u8 ratr_index = _rtl_rate_id(hw, sta_entry, RATR_INX_WIRELESS_MC);

	if (sta) {
		sta_entry = (struct rtl_sta_info *)sta->drv_priv;
		ratr_index = sta_entry->ratr_index;
	}
	if (!tcb_desc->disable_ratefallback || !tcb_desc->use_driver_rate) {
		if (mac->opmode == NL80211_IFTYPE_STATION) {
			tcb_desc->ratr_index = 0;
		} else if (mac->opmode == NL80211_IFTYPE_ADHOC ||
				mac->opmode == NL80211_IFTYPE_MESH_POINT) {
			if (tcb_desc->multicast || tcb_desc->broadcast) {
				tcb_desc->hw_rate =
				    rtlpriv->cfg->maps[RTL_RC_CCK_RATE2M];
				tcb_desc->use_driver_rate = 1;
				tcb_desc->ratr_index =
					_rtl_rate_id(hw, sta_entry,
						     RATR_INX_WIRELESS_MC);
			} else {
				tcb_desc->ratr_index = ratr_index;
			}
		} else if (mac->opmode == NL80211_IFTYPE_AP) {
			tcb_desc->ratr_index = ratr_index;
		}
	}

	if (rtlpriv->dm.useramask) {
		tcb_desc->ratr_index = ratr_index;
		/* TODO we will differentiate adhoc and station future  */
		if (mac->opmode == NL80211_IFTYPE_STATION ||
		    mac->opmode == NL80211_IFTYPE_MESH_POINT) {
			tcb_desc->mac_id = 0;

			if (sta &&
			    (rtlpriv->cfg->spec_ver & RTL_SPEC_NEW_RATEID))
				;	/* use sta_entry->ratr_index */
			else if (mac->mode == WIRELESS_MODE_AC_5G)
				tcb_desc->ratr_index =
					_rtl_rate_id(hw, sta_entry,
						     RATR_INX_WIRELESS_AC_5N);
			else if (mac->mode == WIRELESS_MODE_AC_24G)
				tcb_desc->ratr_index =
					_rtl_rate_id(hw, sta_entry,
						     RATR_INX_WIRELESS_AC_24N);
			else if (mac->mode == WIRELESS_MODE_N_24G)
				tcb_desc->ratr_index =
					_rtl_rate_id(hw, sta_entry,
						     RATR_INX_WIRELESS_NGB);
			else if (mac->mode == WIRELESS_MODE_N_5G)
				tcb_desc->ratr_index =
					_rtl_rate_id(hw, sta_entry,
						     RATR_INX_WIRELESS_NG);
			else if (mac->mode & WIRELESS_MODE_G)
				tcb_desc->ratr_index =
					_rtl_rate_id(hw, sta_entry,
						     RATR_INX_WIRELESS_GB);
			else if (mac->mode & WIRELESS_MODE_B)
				tcb_desc->ratr_index =
					_rtl_rate_id(hw, sta_entry,
						     RATR_INX_WIRELESS_B);
			else if (mac->mode & WIRELESS_MODE_A)
				tcb_desc->ratr_index =
					_rtl_rate_id(hw, sta_entry,
						     RATR_INX_WIRELESS_G);

		} else if (mac->opmode == NL80211_IFTYPE_AP ||
			mac->opmode == NL80211_IFTYPE_ADHOC) {
			if (sta) {
				if (sta->aid > 0)
					tcb_desc->mac_id = sta->aid + 1;
				else
					tcb_desc->mac_id = 1;
			} else {
				tcb_desc->mac_id = 0;
			}
		}
	}
}

static void _rtl_query_bandwidth_mode(struct ieee80211_hw *hw,
				      struct ieee80211_sta *sta,
				      struct rtl_tcb_desc *tcb_desc)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));

	tcb_desc->packet_bw = false;
	if (!sta)
		return;
	if (mac->opmode == NL80211_IFTYPE_AP ||
	    mac->opmode == NL80211_IFTYPE_ADHOC ||
	    mac->opmode == NL80211_IFTYPE_MESH_POINT) {
		if (!(sta->ht_cap.ht_supported) ||
		    !(sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
			return;
	} else if (mac->opmode == NL80211_IFTYPE_STATION) {
		if (!mac->bw_40 || !(sta->ht_cap.ht_supported))
			return;
	}
	if (tcb_desc->multicast || tcb_desc->broadcast)
		return;

	/*use legency rate, shall use 20MHz */
	if (tcb_desc->hw_rate <= rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M])
		return;

	tcb_desc->packet_bw = HT_CHANNEL_WIDTH_20_40;

	if (rtlpriv->rtlhal.hw_type == HARDWARE_TYPE_RTL8812AE ||
	    rtlpriv->rtlhal.hw_type == HARDWARE_TYPE_RTL8821AE ||
	    (rtlpriv->cfg->spec_ver & RTL_SPEC_SUPPORT_VHT)) {
		if (mac->opmode == NL80211_IFTYPE_AP ||
		    mac->opmode == NL80211_IFTYPE_ADHOC ||
		    mac->opmode == NL80211_IFTYPE_MESH_POINT) {
			if (!(sta->vht_cap.vht_supported))
				return;
		} else if (mac->opmode == NL80211_IFTYPE_STATION) {
			if (!mac->bw_80 ||
			    !(sta->vht_cap.vht_supported))
				return;
		}
		if (tcb_desc->hw_rate <=
			rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15])
			return;
		tcb_desc->packet_bw = HT_CHANNEL_WIDTH_80;
	}
}

static u8 _rtl_get_vht_highest_n_rate(struct ieee80211_hw *hw,
				      struct ieee80211_sta *sta)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_phy *rtlphy = &rtlpriv->phy;
	u8 hw_rate;
	u16 tx_mcs_map = le16_to_cpu(sta->vht_cap.vht_mcs.tx_mcs_map);

	if ((get_rf_type(rtlphy) == RF_2T2R) &&
	    (tx_mcs_map & 0x000c) != 0x000c) {
		if ((tx_mcs_map & 0x000c) >> 2 ==
			IEEE80211_VHT_MCS_SUPPORT_0_7)
			hw_rate =
			rtlpriv->cfg->maps[RTL_RC_VHT_RATE_2SS_MCS7];
		else if ((tx_mcs_map  & 0x000c) >> 2 ==
			IEEE80211_VHT_MCS_SUPPORT_0_8)
			hw_rate =
			rtlpriv->cfg->maps[RTL_RC_VHT_RATE_2SS_MCS8];
		else
			hw_rate =
			rtlpriv->cfg->maps[RTL_RC_VHT_RATE_2SS_MCS9];
	} else {
		if ((tx_mcs_map  & 0x0003) ==
			IEEE80211_VHT_MCS_SUPPORT_0_7)
			hw_rate =
			rtlpriv->cfg->maps[RTL_RC_VHT_RATE_1SS_MCS7];
		else if ((tx_mcs_map  & 0x0003) ==
			IEEE80211_VHT_MCS_SUPPORT_0_8)
			hw_rate =
			rtlpriv->cfg->maps[RTL_RC_VHT_RATE_1SS_MCS8];
		else
			hw_rate =
			rtlpriv->cfg->maps[RTL_RC_VHT_RATE_1SS_MCS9];
	}

	return hw_rate;
}

static u8 _rtl_get_highest_n_rate(struct ieee80211_hw *hw,
				  struct ieee80211_sta *sta)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_phy *rtlphy = &rtlpriv->phy;
	u8 hw_rate;

	if (get_rf_type(rtlphy) == RF_2T2R &&
	    sta->ht_cap.mcs.rx_mask[1] != 0)
		hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15];
	else
		hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS7];

	return hw_rate;
}

/* mac80211's rate_idx is like this:
 *
 * 2.4G band:rx_status->band == NL80211_BAND_2GHZ
 *
 * B/G rate:
 * (rx_status->flag & RX_FLAG_HT) = 0,
 * DESC_RATE1M-->DESC_RATE54M ==> idx is 0-->11,
 *
 * N rate:
 * (rx_status->flag & RX_FLAG_HT) = 1,
 * DESC_RATEMCS0-->DESC_RATEMCS15 ==> idx is 0-->15
 *
 * 5G band:rx_status->band == NL80211_BAND_5GHZ
 * A rate:
 * (rx_status->flag & RX_FLAG_HT) = 0,
 * DESC_RATE6M-->DESC_RATE54M ==> idx is 0-->7,
 *
 * N rate:
 * (rx_status->flag & RX_FLAG_HT) = 1,
 * DESC_RATEMCS0-->DESC_RATEMCS15 ==> idx is 0-->15
 *
 * VHT rates:
 * DESC_RATEVHT1SS_MCS0-->DESC_RATEVHT1SS_MCS9 ==> idx is 0-->9
 * DESC_RATEVHT2SS_MCS0-->DESC_RATEVHT2SS_MCS9 ==> idx is 0-->9
 */
int rtlwifi_rate_mapping(struct ieee80211_hw *hw, bool isht, bool isvht,
			 u8 desc_rate)
{
	int rate_idx;

	if (isvht) {
		switch (desc_rate) {
		case DESC_RATEVHT1SS_MCS0:
			rate_idx = 0;
			break;
		case DESC_RATEVHT1SS_MCS1:
			rate_idx = 1;
			break;
		case DESC_RATEVHT1SS_MCS2:
			rate_idx = 2;
			break;
		case DESC_RATEVHT1SS_MCS3:
			rate_idx = 3;
			break;
		case DESC_RATEVHT1SS_MCS4:
			rate_idx = 4;
			break;
		case DESC_RATEVHT1SS_MCS5:
			rate_idx = 5;
			break;
		case DESC_RATEVHT1SS_MCS6:
			rate_idx = 6;
			break;
		case DESC_RATEVHT1SS_MCS7:
			rate_idx = 7;
			break;
		case DESC_RATEVHT1SS_MCS8:
			rate_idx = 8;
			break;
		case DESC_RATEVHT1SS_MCS9:
			rate_idx = 9;
			break;
		case DESC_RATEVHT2SS_MCS0:
			rate_idx = 0;
			break;
		case DESC_RATEVHT2SS_MCS1:
			rate_idx = 1;
			break;
		case DESC_RATEVHT2SS_MCS2:
			rate_idx = 2;
			break;
		case DESC_RATEVHT2SS_MCS3:
			rate_idx = 3;
			break;
		case DESC_RATEVHT2SS_MCS4:
			rate_idx = 4;
			break;
		case DESC_RATEVHT2SS_MCS5:
			rate_idx = 5;
			break;
		case DESC_RATEVHT2SS_MCS6:
			rate_idx = 6;
			break;
		case DESC_RATEVHT2SS_MCS7:
			rate_idx = 7;
			break;
		case DESC_RATEVHT2SS_MCS8:
			rate_idx = 8;
			break;
		case DESC_RATEVHT2SS_MCS9:
			rate_idx = 9;
			break;
		default:
			rate_idx = 0;
			break;
		}
		return rate_idx;
	}
	if (!isht) {
		if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
			switch (desc_rate) {
			case DESC_RATE1M:
				rate_idx = 0;
				break;
			case DESC_RATE2M:
				rate_idx = 1;
				break;
			case DESC_RATE5_5M:
				rate_idx = 2;
				break;
			case DESC_RATE11M:
				rate_idx = 3;
				break;
			case DESC_RATE6M:
				rate_idx = 4;
				break;
			case DESC_RATE9M:
				rate_idx = 5;
				break;
			case DESC_RATE12M:
				rate_idx = 6;
				break;
			case DESC_RATE18M:
				rate_idx = 7;
				break;
			case DESC_RATE24M:
				rate_idx = 8;
				break;
			case DESC_RATE36M:
				rate_idx = 9;
				break;
			case DESC_RATE48M:
				rate_idx = 10;
				break;
			case DESC_RATE54M:
				rate_idx = 11;
				break;
			default:
				rate_idx = 0;
				break;
			}
		} else {
			switch (desc_rate) {
			case DESC_RATE6M:
				rate_idx = 0;
				break;
			case DESC_RATE9M:
				rate_idx = 1;
				break;
			case DESC_RATE12M:
				rate_idx = 2;
				break;
			case DESC_RATE18M:
				rate_idx = 3;
				break;
			case DESC_RATE24M:
				rate_idx = 4;
				break;
			case DESC_RATE36M:
				rate_idx = 5;
				break;
			case DESC_RATE48M:
				rate_idx = 6;
				break;
			case DESC_RATE54M:
				rate_idx = 7;
				break;
			default:
				rate_idx = 0;
				break;
			}
		}
	} else {
		switch (desc_rate) {
		case DESC_RATEMCS0:
			rate_idx = 0;
			break;
		case DESC_RATEMCS1:
			rate_idx = 1;
			break;
		case DESC_RATEMCS2:
			rate_idx = 2;
			break;
		case DESC_RATEMCS3:
			rate_idx = 3;
			break;
		case DESC_RATEMCS4:
			rate_idx = 4;
			break;
		case DESC_RATEMCS5:
			rate_idx = 5;
			break;
		case DESC_RATEMCS6:
			rate_idx = 6;
			break;
		case DESC_RATEMCS7:
			rate_idx = 7;
			break;
		case DESC_RATEMCS8:
			rate_idx = 8;
			break;
		case DESC_RATEMCS9:
			rate_idx = 9;
			break;
		case DESC_RATEMCS10:
			rate_idx = 10;
			break;
		case DESC_RATEMCS11:
			rate_idx = 11;
			break;
		case DESC_RATEMCS12:
			rate_idx = 12;
			break;
		case DESC_RATEMCS13:
			rate_idx = 13;
			break;
		case DESC_RATEMCS14:
			rate_idx = 14;
			break;
		case DESC_RATEMCS15:
			rate_idx = 15;
			break;
		default:
			rate_idx = 0;
			break;
		}
	}
	return rate_idx;
}

static u8 _rtl_get_tx_hw_rate(struct ieee80211_hw *hw,
			      struct ieee80211_tx_info *info)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct ieee80211_tx_rate *r = &info->status.rates[0];
	struct ieee80211_rate *txrate;
	u8 hw_value = 0x0;

	if (r->flags & IEEE80211_TX_RC_MCS) {
		/* HT MCS0-15 */
		hw_value = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15] - 15 +
			   r->idx;
	} else if (r->flags & IEEE80211_TX_RC_VHT_MCS) {
		/* VHT MCS0-9, NSS */
		if (ieee80211_rate_get_vht_nss(r) == 2)
			hw_value = rtlpriv->cfg->maps[RTL_RC_VHT_RATE_2SS_MCS9];
		else
			hw_value = rtlpriv->cfg->maps[RTL_RC_VHT_RATE_1SS_MCS9];

		hw_value = hw_value - 9 + ieee80211_rate_get_vht_mcs(r);
	} else {
		/* legacy */
		txrate = ieee80211_get_tx_rate(hw, info);

		if (txrate)
			hw_value = txrate->hw_value;
	}

	/* check 5G band */
	if (rtlpriv->rtlhal.current_bandtype == BAND_ON_5G &&
	    hw_value < rtlpriv->cfg->maps[RTL_RC_OFDM_RATE6M])
		hw_value = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE6M];

	return hw_value;
}

void rtl_get_tcb_desc(struct ieee80211_hw *hw,
		      struct ieee80211_tx_info *info,
		      struct ieee80211_sta *sta,
		      struct sk_buff *skb, struct rtl_tcb_desc *tcb_desc)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
	struct rtl_sta_info *sta_entry =
		(sta ? (struct rtl_sta_info *)sta->drv_priv : NULL);

	__le16 fc = rtl_get_fc(skb);

	tcb_desc->hw_rate = _rtl_get_tx_hw_rate(hw, info);

	if (rtl_is_tx_report_skb(hw, skb))
		tcb_desc->use_spe_rpt = 1;

	if (!ieee80211_is_data(fc)) {
		tcb_desc->use_driver_rate = true;
		tcb_desc->ratr_index = _rtl_rate_id(hw, sta_entry,
						    RATR_INX_WIRELESS_MC);
		tcb_desc->disable_ratefallback = 1;
		tcb_desc->mac_id = 0;
		tcb_desc->packet_bw = false;

		return;
	}

	/*
	 * We set data rate INX 0
	 * in rtl_rc.c if skb is special data or
	 * mgt which need low data rate.
	 */

	/*
	 * So tcb_desc->hw_rate is just used for
	 * special data and mgt frames
	 */
	if (info->control.rates[0].idx == 0 || ieee80211_is_nullfunc(fc)) {
		tcb_desc->use_driver_rate = true;
		tcb_desc->ratr_index = _rtl_rate_id(hw, sta_entry,
						    RATR_INX_WIRELESS_MC);

		tcb_desc->disable_ratefallback = 1;
	} else if (sta && sta->vht_cap.vht_supported) {
		/*
		 * Because hw will never use hw_rate
		 * when tcb_desc->use_driver_rate = false
		 * so we never set highest N rate here,
		 * and N rate will all be controlled by FW
		 * when tcb_desc->use_driver_rate = false
		 */
		tcb_desc->hw_rate = _rtl_get_vht_highest_n_rate(hw, sta);
	} else if (sta && sta->ht_cap.ht_supported) {
		tcb_desc->hw_rate = _rtl_get_highest_n_rate(hw, sta);
	} else {
		enum rtl_var_map var = RTL_RC_OFDM_RATE54M;

		if (rtlmac->mode == WIRELESS_MODE_B)
			var = RTL_RC_CCK_RATE11M;

		tcb_desc->hw_rate = rtlpriv->cfg->maps[var];
	}

	if (is_multicast_ether_addr(hdr->addr1))
		tcb_desc->multicast = 1;
	else if (is_broadcast_ether_addr(hdr->addr1))
		tcb_desc->broadcast = 1;

	_rtl_txrate_selectmode(hw, sta, tcb_desc);
	_rtl_query_bandwidth_mode(hw, sta, tcb_desc);
	_rtl_qurey_shortpreamble_mode(hw, tcb_desc, info);
	_rtl_query_shortgi(hw, sta, tcb_desc, info);
	_rtl_query_protection_mode(hw, tcb_desc, info);
}

bool rtl_tx_mgmt_proc(struct ieee80211_hw *hw, struct sk_buff *skb)
{
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	__le16 fc = rtl_get_fc(skb);

	if (rtlpriv->dm.supp_phymode_switch &&
	    mac->link_state < MAC80211_LINKED &&
	    (ieee80211_is_auth(fc) || ieee80211_is_probe_req(fc))) {
		if (rtlpriv->cfg->ops->chk_switch_dmdp)
			rtlpriv->cfg->ops->chk_switch_dmdp(hw);
	}
	if (ieee80211_is_auth(fc)) {
		RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");

		mac->link_state = MAC80211_LINKING;
		/* Dul mac */
		rtlpriv->phy.need_iqk = true;
	}
	return true;
}

struct sk_buff *rtl_make_del_ba(struct ieee80211_hw *hw, u8 *sa,
				u8 *bssid, u16 tid);

static void process_agg_start(struct ieee80211_hw *hw,
			      struct ieee80211_hdr *hdr, u16 tid)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct ieee80211_rx_status rx_status = { 0 };
	struct sk_buff *skb_delba = NULL;

	skb_delba = rtl_make_del_ba(hw, hdr->addr2, hdr->addr3, tid);
	if (skb_delba) {
		rx_status.freq = hw->conf.chandef.chan->center_freq;
		rx_status.band = hw->conf.chandef.chan->band;
		rx_status.flag |= RX_FLAG_DECRYPTED;
		rx_status.flag |= RX_FLAG_MACTIME_START;
		rx_status.rate_idx = 0;
		rx_status.signal = 50 + 10;
		memcpy(IEEE80211_SKB_RXCB(skb_delba),
		       &rx_status, sizeof(rx_status));
		RT_PRINT_DATA(rtlpriv, COMP_INIT, DBG_DMESG,
			      "fake del\n",
			      skb_delba->data,
			      skb_delba->len);
		ieee80211_rx_irqsafe(hw, skb_delba);
	}
}

bool rtl_action_proc(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
{
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	__le16 fc = rtl_get_fc(skb);
	u8 *act = (u8 *)(((u8 *)skb->data + MAC80211_3ADDR_LEN));
	u8 category;

	if (!ieee80211_is_action(fc))
		return true;

	category = *act;
	act++;
	switch (category) {
	case ACT_CAT_BA:
		switch (*act) {
		case ACT_ADDBAREQ:
			if (mac->act_scanning)
				return false;

			RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
				 "%s ACT_ADDBAREQ From :%pM\n",
				 is_tx ? "Tx" : "Rx", hdr->addr2);
			RT_PRINT_DATA(rtlpriv, COMP_INIT, DBG_DMESG, "req\n",
				      skb->data, skb->len);
			if (!is_tx) {
				struct ieee80211_sta *sta = NULL;
				struct rtl_sta_info *sta_entry = NULL;
				struct rtl_tid_data *tid_data;
				struct ieee80211_mgmt *mgmt = (void *)skb->data;
				u16 capab = 0, tid = 0;

				rcu_read_lock();
				sta = rtl_find_sta(hw, hdr->addr3);
				if (!sta) {
					RT_TRACE(rtlpriv, COMP_SEND | COMP_RECV,
						 DBG_DMESG, "sta is NULL\n");
					rcu_read_unlock();
					return true;
				}

				sta_entry =
					(struct rtl_sta_info *)sta->drv_priv;
				if (!sta_entry) {
					rcu_read_unlock();
					return true;
				}
				capab =
				  le16_to_cpu(mgmt->u.action.u.addba_req.capab);
				tid = (capab &
				       IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
				if (tid >= MAX_TID_COUNT) {
					rcu_read_unlock();
					return true;
				}
				tid_data = &sta_entry->tids[tid];
				if (tid_data->agg.rx_agg_state ==
				    RTL_RX_AGG_START)
					process_agg_start(hw, hdr, tid);
				rcu_read_unlock();
			}
			break;
		case ACT_ADDBARSP:
			RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
				 "%s ACT_ADDBARSP From :%pM\n",
				  is_tx ? "Tx" : "Rx", hdr->addr2);
			break;
		case ACT_DELBA:
			RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
				 "ACT_ADDBADEL From :%pM\n", hdr->addr2);
			break;
		}
		break;
	default:
		break;
	}

	return true;
}

static void setup_special_tx(struct rtl_priv *rtlpriv, struct rtl_ps_ctl *ppsc,
			     int type)
{
	struct ieee80211_hw *hw = rtlpriv->hw;

	rtlpriv->ra.is_special_data = true;
	if (rtlpriv->cfg->ops->get_btc_status())
		rtlpriv->btcoexist.btc_ops->btc_special_packet_notify(rtlpriv,
								      type);
	rtl_lps_leave(hw);
	ppsc->last_delaylps_stamp_jiffies = jiffies;
}

static const u8 *rtl_skb_ether_type_ptr(struct ieee80211_hw *hw,
					struct sk_buff *skb, bool is_enc)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
	u8 encrypt_header_len = 0;
	u8 offset;

	switch (rtlpriv->sec.pairwise_enc_algorithm) {
	case WEP40_ENCRYPTION:
	case WEP104_ENCRYPTION:
		encrypt_header_len = 4;/*WEP_IV_LEN*/
		break;
	case TKIP_ENCRYPTION:
		encrypt_header_len = 8;/*TKIP_IV_LEN*/
		break;
	case AESCCMP_ENCRYPTION:
		encrypt_header_len = 8;/*CCMP_HDR_LEN;*/
		break;
	default:
		break;
	}

	offset = mac_hdr_len + SNAP_SIZE;
	if (is_enc)
		offset += encrypt_header_len;

	return skb->data + offset;
}

/*should call before software enc*/
u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx,
		       bool is_enc)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	__le16 fc = rtl_get_fc(skb);
	u16 ether_type;
	const u8 *ether_type_ptr;
	const struct iphdr *ip;

	if (!ieee80211_is_data(fc))
		goto end;

	ether_type_ptr = rtl_skb_ether_type_ptr(hw, skb, is_enc);
	ether_type = be16_to_cpup((__be16 *)ether_type_ptr);

	if (ether_type == ETH_P_IP) {
		ip = (struct iphdr *)((u8 *)ether_type_ptr +
		     PROTOC_TYPE_SIZE);
		if (ip->protocol == IPPROTO_UDP) {
			struct udphdr *udp = (struct udphdr *)((u8 *)ip +
							       (ip->ihl << 2));
			if (((((u8 *)udp)[1] == 68) &&
			     (((u8 *)udp)[3] == 67)) ||
			    ((((u8 *)udp)[1] == 67) &&
			     (((u8 *)udp)[3] == 68))) {
				/* 68 : UDP BOOTP client
				 * 67 : UDP BOOTP server
				 */
				RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
					 DBG_DMESG, "dhcp %s !!\n",
					 (is_tx) ? "Tx" : "Rx");

				if (is_tx)
					setup_special_tx(rtlpriv, ppsc,
							 PACKET_DHCP);

				return true;
			}
		}
	} else if (ether_type == ETH_P_ARP) {
		if (is_tx)
			setup_special_tx(rtlpriv, ppsc, PACKET_ARP);

		return true;
	} else if (ether_type == ETH_P_PAE) {
		/* EAPOL is seen as in-4way */
		rtlpriv->btcoexist.btc_info.in_4way = true;
		rtlpriv->btcoexist.btc_info.in_4way_ts = jiffies;
		rtlpriv->btcoexist.btc_info.in_4way_ts = jiffies;

		RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
			 "802.1X %s EAPOL pkt!!\n", (is_tx) ? "Tx" : "Rx");

		if (is_tx) {
			rtlpriv->ra.is_special_data = true;
			rtl_lps_leave(hw);
			ppsc->last_delaylps_stamp_jiffies = jiffies;

			setup_special_tx(rtlpriv, ppsc, PACKET_EAPOL);
		}

		return true;
	} else if (ether_type == ETH_P_IPV6) {
		/* TODO: Handle any IPv6 cases that need special handling.
		 * For now, always return false
		 */
		goto end;
	}

end:
	rtlpriv->ra.is_special_data = false;
	return false;
}

bool rtl_is_tx_report_skb(struct ieee80211_hw *hw, struct sk_buff *skb)
{
	u16 ether_type;
	const u8 *ether_type_ptr;

	ether_type_ptr = rtl_skb_ether_type_ptr(hw, skb, true);
	ether_type = be16_to_cpup((__be16 *)ether_type_ptr);

	/* EAPOL */
	if (ether_type == ETH_P_PAE)
		return true;

	return false;
}

static u16 rtl_get_tx_report_sn(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_tx_report *tx_report = &rtlpriv->tx_report;
	u16 sn;

	/*
	 * SW_DEFINE[11:8] are reserved (driver fills zeros)
	 * SW_DEFINE[7:2] are used by driver
	 * SW_DEFINE[1:0] are reserved for firmware (driver fills zeros)
	 */
	sn = (atomic_inc_return(&tx_report->sn) & 0x003F) << 2;

	tx_report->last_sent_sn = sn;
	tx_report->last_sent_time = jiffies;

	RT_TRACE(rtlpriv, COMP_TX_REPORT, DBG_DMESG,
		 "Send TX-Report sn=0x%X\n", sn);

	return sn;
}

void rtl_get_tx_report(struct rtl_tcb_desc *ptcb_desc, u8 *pdesc,
		       struct ieee80211_hw *hw)
{
	if (ptcb_desc->use_spe_rpt) {
		u16 sn = rtl_get_tx_report_sn(hw);

		SET_TX_DESC_SPE_RPT(pdesc, 1);
		SET_TX_DESC_SW_DEFINE(pdesc, sn);
	}
}

void rtl_tx_report_handler(struct ieee80211_hw *hw, u8 *tmp_buf, u8 c2h_cmd_len)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_tx_report *tx_report = &rtlpriv->tx_report;
	u16 sn;
	u8 st, retry;

	if (rtlpriv->cfg->spec_ver & RTL_SPEC_NEW_FW_C2H) {
		sn = tmp_buf[6];
		st = tmp_buf[7] & 0xC0;
		retry = tmp_buf[8] & 0x3F;
	} else {
		sn = ((tmp_buf[7] & 0x0F) << 8) | tmp_buf[6];
		st = tmp_buf[0] & 0xC0;
		retry = tmp_buf[2] & 0x3F;
	}

	tx_report->last_recv_sn = sn;

	RT_TRACE(rtlpriv, COMP_TX_REPORT, DBG_DMESG,
		 "Recv TX-Report st=0x%02X sn=0x%X retry=0x%X\n",
		 st, sn, retry);
}

bool rtl_check_tx_report_acked(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_tx_report *tx_report = &rtlpriv->tx_report;

	if (tx_report->last_sent_sn == tx_report->last_recv_sn)
		return true;

	if (time_before(tx_report->last_sent_time + 3 * HZ, jiffies)) {
		RT_TRACE(rtlpriv, COMP_TX_REPORT, DBG_WARNING,
			 "Check TX-Report timeout!! s_sn=0x%X r_sn=0x%X\n",
			 tx_report->last_sent_sn, tx_report->last_recv_sn);
		return true;	/* 3 sec. (timeout) seen as acked */
	}

	return false;
}

void rtl_wait_tx_report_acked(struct ieee80211_hw *hw, u32 wait_ms)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	int i;

	for (i = 0; i < wait_ms; i++) {
		if (rtl_check_tx_report_acked(hw))
			break;
		usleep_range(1000, 2000);
		RT_TRACE(rtlpriv, COMP_SEC, DBG_DMESG,
			 "Wait 1ms (%d/%d) to disable key.\n", i, wait_ms);
	}
}

u32 rtl_get_hal_edca_param(struct ieee80211_hw *hw,
			   struct ieee80211_vif *vif,
			   enum wireless_mode wirelessmode,
			   struct ieee80211_tx_queue_params *param)
{
	u32 reg = 0;
	u8 sifstime = 10;
	u8 slottime = 20;

	/* AIFS = AIFSN * slot time + SIFS */
	switch (wirelessmode) {
	case WIRELESS_MODE_A:
	case WIRELESS_MODE_N_24G:
	case WIRELESS_MODE_N_5G:
	case WIRELESS_MODE_AC_5G:
	case WIRELESS_MODE_AC_24G:
		sifstime = 16;
		slottime = 9;
		break;
	case WIRELESS_MODE_G:
		slottime = (vif->bss_conf.use_short_slot ? 9 : 20);
		break;
	default:
		break;
	}

	reg |= (param->txop & 0x7FF) << 16;
	reg |= (fls(param->cw_max) & 0xF) << 12;
	reg |= (fls(param->cw_min) & 0xF) << 8;
	reg |= (param->aifs & 0x0F) * slottime + sifstime;

	return reg;
}

/*********************************************************
 *
 * functions called by core.c
 *
 *********************************************************/
int rtl_tx_agg_start(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_tid_data *tid_data;
	struct rtl_sta_info *sta_entry = NULL;

	if (!sta)
		return -EINVAL;

	if (unlikely(tid >= MAX_TID_COUNT))
		return -EINVAL;

	sta_entry = (struct rtl_sta_info *)sta->drv_priv;
	if (!sta_entry)
		return -ENXIO;
	tid_data = &sta_entry->tids[tid];

	RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
		 "on ra = %pM tid = %d seq:%d\n", sta->addr, tid,
		 tid_data->seq_number);

	*ssn = tid_data->seq_number;
	tid_data->agg.agg_state = RTL_AGG_START;

	ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
	return 0;
}

int rtl_tx_agg_stop(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		    struct ieee80211_sta *sta, u16 tid)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_tid_data *tid_data;
	struct rtl_sta_info *sta_entry = NULL;

	if (!sta)
		return -EINVAL;

	RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
		 "on ra = %pM tid = %d\n", sta->addr, tid);

	if (unlikely(tid >= MAX_TID_COUNT))
		return -EINVAL;

	sta_entry = (struct rtl_sta_info *)sta->drv_priv;
	tid_data = &sta_entry->tids[tid];
	sta_entry->tids[tid].agg.agg_state = RTL_AGG_STOP;

	ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
	return 0;
}

int rtl_rx_agg_start(struct ieee80211_hw *hw,
		     struct ieee80211_sta *sta, u16 tid)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_tid_data *tid_data;
	struct rtl_sta_info *sta_entry = NULL;
	u8 reject_agg;

	if (!sta)
		return -EINVAL;

	if (unlikely(tid >= MAX_TID_COUNT))
		return -EINVAL;

	if (rtlpriv->cfg->ops->get_btc_status()) {
		rtlpriv->btcoexist.btc_ops->btc_get_ampdu_cfg(rtlpriv,
							      &reject_agg,
							      NULL, NULL);
		if (reject_agg)
			return -EINVAL;
	}

	sta_entry = (struct rtl_sta_info *)sta->drv_priv;
	if (!sta_entry)
		return -ENXIO;
	tid_data = &sta_entry->tids[tid];

	RT_TRACE(rtlpriv, COMP_RECV, DBG_DMESG,
		 "on ra = %pM tid = %d seq:%d\n", sta->addr, tid,
		 tid_data->seq_number);

	tid_data->agg.rx_agg_state = RTL_RX_AGG_START;
	return 0;
}

int rtl_rx_agg_stop(struct ieee80211_hw *hw,
		    struct ieee80211_sta *sta, u16 tid)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_sta_info *sta_entry = NULL;

	if (!sta)
		return -EINVAL;

	RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
		 "on ra = %pM tid = %d\n", sta->addr, tid);

	if (unlikely(tid >= MAX_TID_COUNT))
		return -EINVAL;

	sta_entry = (struct rtl_sta_info *)sta->drv_priv;
	sta_entry->tids[tid].agg.rx_agg_state = RTL_RX_AGG_STOP;

	return 0;
}

int rtl_tx_agg_oper(struct ieee80211_hw *hw,
		    struct ieee80211_sta *sta, u16 tid)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_sta_info *sta_entry = NULL;

	if (!sta)
		return -EINVAL;

	RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
		 "on ra = %pM tid = %d\n", sta->addr, tid);

	if (unlikely(tid >= MAX_TID_COUNT))
		return -EINVAL;

	sta_entry = (struct rtl_sta_info *)sta->drv_priv;
	sta_entry->tids[tid].agg.agg_state = RTL_AGG_OPERATIONAL;

	return 0;
}

void rtl_rx_ampdu_apply(struct rtl_priv *rtlpriv)
{
	struct rtl_btc_ops *btc_ops = rtlpriv->btcoexist.btc_ops;
	u8 reject_agg = 0, ctrl_agg_size = 0, agg_size = 0;

	if (rtlpriv->cfg->ops->get_btc_status())
		btc_ops->btc_get_ampdu_cfg(rtlpriv, &reject_agg,
					   &ctrl_agg_size, &agg_size);

	RT_TRACE(rtlpriv, COMP_BT_COEXIST, DBG_DMESG,
		 "Set RX AMPDU: coex - reject=%d, ctrl_agg_size=%d, size=%d",
		 reject_agg, ctrl_agg_size, agg_size);

	rtlpriv->hw->max_rx_aggregation_subframes =
		(ctrl_agg_size ? agg_size : IEEE80211_MAX_AMPDU_BUF_HT);
}

/*********************************************************
 *
 * wq & timer callback functions
 *
 *********************************************************/
/* this function is used for roaming */
void rtl_beacon_statistic(struct ieee80211_hw *hw, struct sk_buff *skb)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;

	if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION)
		return;

	if (rtlpriv->mac80211.link_state < MAC80211_LINKED)
		return;

	/* check if this really is a beacon */
	if (!ieee80211_is_beacon(hdr->frame_control) &&
	    !ieee80211_is_probe_resp(hdr->frame_control))
		return;

	/* min. beacon length + FCS_LEN */
	if (skb->len <= 40 + FCS_LEN)
		return;

	/* and only beacons from the associated BSSID, please */
	if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
		return;

	rtlpriv->link_info.bcn_rx_inperiod++;
}

static void rtl_free_entries_from_scan_list(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_bssid_entry *entry, *next;

	list_for_each_entry_safe(entry, next, &rtlpriv->scan_list.list, list) {
		list_del(&entry->list);
		kfree(entry);
		rtlpriv->scan_list.num--;
	}
}

void rtl_scan_list_expire(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_bssid_entry *entry, *next;
	unsigned long flags;

	spin_lock_irqsave(&rtlpriv->locks.scan_list_lock, flags);

	list_for_each_entry_safe(entry, next, &rtlpriv->scan_list.list, list) {
		/* 180 seconds */
		if (jiffies_to_msecs(jiffies - entry->age) < 180000)
			continue;

		list_del(&entry->list);
		rtlpriv->scan_list.num--;

		RT_TRACE(rtlpriv, COMP_SCAN, DBG_LOUD,
			 "BSSID=%pM is expire in scan list (total=%d)\n",
			 entry->bssid, rtlpriv->scan_list.num);
		kfree(entry);
	}

	spin_unlock_irqrestore(&rtlpriv->locks.scan_list_lock, flags);

	rtlpriv->btcoexist.btc_info.ap_num = rtlpriv->scan_list.num;
}

void rtl_collect_scan_list(struct ieee80211_hw *hw, struct sk_buff *skb)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	unsigned long flags;

	struct rtl_bssid_entry *entry;
	bool entry_found = false;

	/* check if it is scanning */
	if (!mac->act_scanning)
		return;

	/* check if this really is a beacon */
	if (!ieee80211_is_beacon(hdr->frame_control) &&
	    !ieee80211_is_probe_resp(hdr->frame_control))
		return;

	spin_lock_irqsave(&rtlpriv->locks.scan_list_lock, flags);

	list_for_each_entry(entry, &rtlpriv->scan_list.list, list) {
		if (memcmp(entry->bssid, hdr->addr3, ETH_ALEN) == 0) {
			list_del_init(&entry->list);
			entry_found = true;
			RT_TRACE(rtlpriv, COMP_SCAN, DBG_LOUD,
				 "Update BSSID=%pM to scan list (total=%d)\n",
				 hdr->addr3, rtlpriv->scan_list.num);
			break;
		}
	}

	if (!entry_found) {
		entry = kmalloc(sizeof(*entry), GFP_ATOMIC);

		if (!entry)
			goto label_err;

		memcpy(entry->bssid, hdr->addr3, ETH_ALEN);
		rtlpriv->scan_list.num++;

		RT_TRACE(rtlpriv, COMP_SCAN, DBG_LOUD,
			 "Add BSSID=%pM to scan list (total=%d)\n",
			 hdr->addr3, rtlpriv->scan_list.num);
	}

	entry->age = jiffies;

	list_add_tail(&entry->list, &rtlpriv->scan_list.list);

label_err:
	spin_unlock_irqrestore(&rtlpriv->locks.scan_list_lock, flags);
}

void rtl_watchdog_wq_callback(void *data)
{
	struct rtl_works *rtlworks = container_of_dwork_rtl(data,
							    struct rtl_works,
							    watchdog_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));
	bool busytraffic = false;
	bool tx_busy_traffic = false;
	bool rx_busy_traffic = false;
	bool higher_busytraffic = false;
	bool higher_busyrxtraffic = false;
	u8 idx, tid;
	u32 rx_cnt_inp4eriod = 0;
	u32 tx_cnt_inp4eriod = 0;
	u32 aver_rx_cnt_inperiod = 0;
	u32 aver_tx_cnt_inperiod = 0;
	u32 aver_tidtx_inperiod[MAX_TID_COUNT] = {0};
	u32 tidtx_inp4eriod[MAX_TID_COUNT] = {0};

	if (is_hal_stop(rtlhal))
		return;

	/* <1> Determine if action frame is allowed */
	if (mac->link_state > MAC80211_NOLINK) {
		if (mac->cnt_after_linked < 20)
			mac->cnt_after_linked++;
	} else {
		mac->cnt_after_linked = 0;
	}

	/* <2> to check if traffic busy, if
	 * busytraffic we don't change channel
	 */
	if (mac->link_state >= MAC80211_LINKED) {
		/* (1) get aver_rx_cnt_inperiod & aver_tx_cnt_inperiod */
		for (idx = 0; idx <= 2; idx++) {
			rtlpriv->link_info.num_rx_in4period[idx] =
			    rtlpriv->link_info.num_rx_in4period[idx + 1];
			rtlpriv->link_info.num_tx_in4period[idx] =
			    rtlpriv->link_info.num_tx_in4period[idx + 1];
		}
		rtlpriv->link_info.num_rx_in4period[3] =
		    rtlpriv->link_info.num_rx_inperiod;
		rtlpriv->link_info.num_tx_in4period[3] =
		    rtlpriv->link_info.num_tx_inperiod;
		for (idx = 0; idx <= 3; idx++) {
			rx_cnt_inp4eriod +=
			    rtlpriv->link_info.num_rx_in4period[idx];
			tx_cnt_inp4eriod +=
			    rtlpriv->link_info.num_tx_in4period[idx];
		}
		aver_rx_cnt_inperiod = rx_cnt_inp4eriod / 4;
		aver_tx_cnt_inperiod = tx_cnt_inp4eriod / 4;

		/* (2) check traffic busy */
		if (aver_rx_cnt_inperiod > 100 || aver_tx_cnt_inperiod > 100) {
			busytraffic = true;
			if (aver_rx_cnt_inperiod > aver_tx_cnt_inperiod)
				rx_busy_traffic = true;
			else
				tx_busy_traffic = false;
		}

		/* Higher Tx/Rx data. */
		if (aver_rx_cnt_inperiod > 4000 ||
		    aver_tx_cnt_inperiod > 4000) {
			higher_busytraffic = true;

			/* Extremely high Rx data. */
			if (aver_rx_cnt_inperiod > 5000)
				higher_busyrxtraffic = true;
		}

		/* check every tid's tx traffic */
		for (tid = 0; tid <= 7; tid++) {
			for (idx = 0; idx <= 2; idx++)
				rtlpriv->link_info.tidtx_in4period[tid][idx] =
					rtlpriv->link_info.tidtx_in4period[tid]
					[idx + 1];
			rtlpriv->link_info.tidtx_in4period[tid][3] =
				rtlpriv->link_info.tidtx_inperiod[tid];

			for (idx = 0; idx <= 3; idx++)
				tidtx_inp4eriod[tid] +=
				   rtlpriv->link_info.tidtx_in4period[tid][idx];
			aver_tidtx_inperiod[tid] = tidtx_inp4eriod[tid] / 4;
			if (aver_tidtx_inperiod[tid] > 5000)
				rtlpriv->link_info.higher_busytxtraffic[tid] =
									true;
			else
				rtlpriv->link_info.higher_busytxtraffic[tid] =
									false;
		}

		/* PS is controlled by coex. */
		if (rtlpriv->cfg->ops->get_btc_status() &&
		    rtlpriv->btcoexist.btc_ops->btc_is_bt_ctrl_lps(rtlpriv))
			goto label_lps_done;

		if (rtlpriv->link_info.num_rx_inperiod +
		      rtlpriv->link_info.num_tx_inperiod > 8 ||
		    rtlpriv->link_info.num_rx_inperiod > 2)
			rtl_lps_leave(hw);
		else
			rtl_lps_enter(hw);

label_lps_done:
		;
	}

	rtlpriv->link_info.num_rx_inperiod = 0;
	rtlpriv->link_info.num_tx_inperiod = 0;
	for (tid = 0; tid <= 7; tid++)
		rtlpriv->link_info.tidtx_inperiod[tid] = 0;

	rtlpriv->link_info.busytraffic = busytraffic;
	rtlpriv->link_info.higher_busytraffic = higher_busytraffic;
	rtlpriv->link_info.rx_busy_traffic = rx_busy_traffic;
	rtlpriv->link_info.tx_busy_traffic = tx_busy_traffic;
	rtlpriv->link_info.higher_busyrxtraffic = higher_busyrxtraffic;

	rtlpriv->stats.txbytesunicast_inperiod =
		rtlpriv->stats.txbytesunicast -
		rtlpriv->stats.txbytesunicast_last;
	rtlpriv->stats.rxbytesunicast_inperiod =
		rtlpriv->stats.rxbytesunicast -
		rtlpriv->stats.rxbytesunicast_last;
	rtlpriv->stats.txbytesunicast_last = rtlpriv->stats.txbytesunicast;
	rtlpriv->stats.rxbytesunicast_last = rtlpriv->stats.rxbytesunicast;

	rtlpriv->stats.txbytesunicast_inperiod_tp =
		(u32)(rtlpriv->stats.txbytesunicast_inperiod * 8 / 2 /
		1024 / 1024);
	rtlpriv->stats.rxbytesunicast_inperiod_tp =
		(u32)(rtlpriv->stats.rxbytesunicast_inperiod * 8 / 2 /
		1024 / 1024);

	/* <3> DM */
	if (!rtlpriv->cfg->mod_params->disable_watchdog)
		rtlpriv->cfg->ops->dm_watchdog(hw);

	/* <4> roaming */
	if (mac->link_state == MAC80211_LINKED &&
	    mac->opmode == NL80211_IFTYPE_STATION) {
		if ((rtlpriv->link_info.bcn_rx_inperiod +
		    rtlpriv->link_info.num_rx_inperiod) == 0) {
			rtlpriv->link_info.roam_times++;
			RT_TRACE(rtlpriv, COMP_ERR, DBG_DMESG,
				 "AP off for %d s\n",
				(rtlpriv->link_info.roam_times * 2));

			/* if we can't recv beacon for 10s,
			 * we should reconnect this AP
			 */
			if (rtlpriv->link_info.roam_times >= 5) {
				pr_err("AP off, try to reconnect now\n");
				rtlpriv->link_info.roam_times = 0;
				ieee80211_connection_loss(rtlpriv->mac80211.vif);
			}
		} else {
			rtlpriv->link_info.roam_times = 0;
		}
	}

	if (rtlpriv->cfg->ops->get_btc_status())
		rtlpriv->btcoexist.btc_ops->btc_periodical(rtlpriv);

	if (rtlpriv->btcoexist.btc_info.in_4way) {
		if (time_after(jiffies, rtlpriv->btcoexist.btc_info.in_4way_ts +
			       msecs_to_jiffies(IN_4WAY_TIMEOUT_TIME)))
			rtlpriv->btcoexist.btc_info.in_4way = false;
	}

	rtlpriv->link_info.bcn_rx_inperiod = 0;

	/* <6> scan list */
	rtl_scan_list_expire(hw);
}

void rtl_watch_dog_timer_callback(struct timer_list *t)
{
	struct rtl_priv *rtlpriv = from_timer(rtlpriv, t, works.watchdog_timer);

	queue_delayed_work(rtlpriv->works.rtl_wq,
			   &rtlpriv->works.watchdog_wq, 0);

	mod_timer(&rtlpriv->works.watchdog_timer,
		  jiffies + MSECS(RTL_WATCH_DOG_TIME));
}

void rtl_fwevt_wq_callback(void *data)
{
	struct rtl_works *rtlworks =
		container_of_dwork_rtl(data, struct rtl_works, fwevt_wq);
	struct ieee80211_hw *hw = rtlworks->hw;
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	rtlpriv->cfg->ops->c2h_command_handle(hw);
}

void rtl_c2hcmd_enqueue(struct ieee80211_hw *hw, u8 tag, u8 len, u8 *val)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	unsigned long flags;
	struct rtl_c2hcmd *c2hcmd;

	c2hcmd = kmalloc(sizeof(*c2hcmd),
			 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);

	if (!c2hcmd)
		goto label_err;

	c2hcmd->val = kmalloc(len,
			      in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);

	if (!c2hcmd->val)
		goto label_err2;

	/* fill data */
	c2hcmd->tag = tag;
	c2hcmd->len = len;
	memcpy(c2hcmd->val, val, len);

	/* enqueue */
	spin_lock_irqsave(&rtlpriv->locks.c2hcmd_lock, flags);

	list_add_tail(&c2hcmd->list, &rtlpriv->c2hcmd_list);

	spin_unlock_irqrestore(&rtlpriv->locks.c2hcmd_lock, flags);

	/* wake up wq */
	queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.c2hcmd_wq, 0);

	return;

label_err2:
	kfree(c2hcmd);

label_err:
	RT_TRACE(rtlpriv, COMP_CMD, DBG_WARNING,
		 "C2H cmd enqueue fail.\n");
}

void rtl_c2hcmd_launcher(struct ieee80211_hw *hw, int exec)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	unsigned long flags;
	struct rtl_c2hcmd *c2hcmd;
	int i;

	for (i = 0; i < 200; i++) {
		/* dequeue a task */
		spin_lock_irqsave(&rtlpriv->locks.c2hcmd_lock, flags);

		c2hcmd = list_first_entry_or_null(&rtlpriv->c2hcmd_list,
						  struct rtl_c2hcmd, list);

		if (c2hcmd)
			list_del(&c2hcmd->list);

		spin_unlock_irqrestore(&rtlpriv->locks.c2hcmd_lock, flags);

		/* do it */
		if (!c2hcmd)
			break;

		if (rtlpriv->cfg->ops->c2h_content_parsing && exec)
			rtlpriv->cfg->ops->c2h_content_parsing(hw,
					c2hcmd->tag, c2hcmd->len, c2hcmd->val);

		/* free */
		kfree(c2hcmd->val);

		kfree(c2hcmd);
	}
}

void rtl_c2hcmd_wq_callback(void *data)
{
	struct rtl_works *rtlworks = container_of_dwork_rtl(data,
							    struct rtl_works,
							    c2hcmd_wq);
	struct ieee80211_hw *hw = rtlworks->hw;

	rtl_c2hcmd_launcher(hw, 1);
}

void rtl_easy_concurrent_retrytimer_callback(struct timer_list *t)
{
	struct rtl_priv *rtlpriv =
		from_timer(rtlpriv, t, works.dualmac_easyconcurrent_retrytimer);
	struct ieee80211_hw *hw = rtlpriv->hw;
	struct rtl_priv *buddy_priv = rtlpriv->buddy_priv;

	if (!buddy_priv)
		return;

	rtlpriv->cfg->ops->dualmac_easy_concurrent(hw);
}

/*********************************************************
 *
 * frame process functions
 *
 *********************************************************/
u8 *rtl_find_ie(u8 *data, unsigned int len, u8 ie)
{
	struct ieee80211_mgmt *mgmt = (void *)data;
	u8 *pos, *end;

	pos = (u8 *)mgmt->u.beacon.variable;
	end = data + len;
	while (pos < end) {
		if (pos + 2 + pos[1] > end)
			return NULL;

		if (pos[0] == ie)
			return pos;

		pos += 2 + pos[1];
	}
	return NULL;
}

/* when we use 2 rx ants we send IEEE80211_SMPS_OFF */
/* when we use 1 rx ant we send IEEE80211_SMPS_STATIC */
static struct sk_buff *rtl_make_smps_action(struct ieee80211_hw *hw,
					    enum ieee80211_smps_mode smps,
					    u8 *da, u8 *bssid)
{
	struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
	struct sk_buff *skb;
	struct ieee80211_mgmt *action_frame;

	/* 27 = header + category + action + smps mode */
	skb = dev_alloc_skb(27 + hw->extra_tx_headroom);
	if (!skb)
		return NULL;

	skb_reserve(skb, hw->extra_tx_headroom);
	action_frame = skb_put_zero(skb, 27);
	memcpy(action_frame->da, da, ETH_ALEN);
	memcpy(action_frame->sa, rtlefuse->dev_addr, ETH_ALEN);
	memcpy(action_frame->bssid, bssid, ETH_ALEN);
	action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
						  IEEE80211_STYPE_ACTION);
	action_frame->u.action.category = WLAN_CATEGORY_HT;
	action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
	switch (smps) {
	case IEEE80211_SMPS_AUTOMATIC:/* 0 */
	case IEEE80211_SMPS_NUM_MODES:/* 4 */
		WARN_ON(1);
	/* fall through */
	case IEEE80211_SMPS_OFF:/* 1 */ /*MIMO_PS_NOLIMIT*/
		action_frame->u.action.u.ht_smps.smps_control =
				WLAN_HT_SMPS_CONTROL_DISABLED;/* 0 */
		break;
	case IEEE80211_SMPS_STATIC:/* 2 */ /*MIMO_PS_STATIC*/
		action_frame->u.action.u.ht_smps.smps_control =
				WLAN_HT_SMPS_CONTROL_STATIC;/* 1 */
		break;
	case IEEE80211_SMPS_DYNAMIC:/* 3 */ /*MIMO_PS_DYNAMIC*/
		action_frame->u.action.u.ht_smps.smps_control =
				WLAN_HT_SMPS_CONTROL_DYNAMIC;/* 3 */
		break;
	}

	return skb;
}

int rtl_send_smps_action(struct ieee80211_hw *hw,
			 struct ieee80211_sta *sta,
			 enum ieee80211_smps_mode smps)
{
	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));
	struct sk_buff *skb = NULL;
	struct rtl_tcb_desc tcb_desc;
	u8 bssid[ETH_ALEN] = {0};

	memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));

	if (rtlpriv->mac80211.act_scanning)
		goto err_free;

	if (!sta)
		goto err_free;

	if (unlikely(is_hal_stop(rtlhal) || ppsc->rfpwr_state != ERFON))
		goto err_free;

	if (!test_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status))
		goto err_free;

	if (rtlpriv->mac80211.opmode == NL80211_IFTYPE_AP)
		memcpy(bssid, rtlpriv->efuse.dev_addr, ETH_ALEN);
	else
		memcpy(bssid, rtlpriv->mac80211.bssid, ETH_ALEN);

	skb = rtl_make_smps_action(hw, smps, sta->addr, bssid);
	/* this is a type = mgmt * stype = action frame */
	if (skb) {
		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
		struct rtl_sta_info *sta_entry =
			(struct rtl_sta_info *)sta->drv_priv;
		sta_entry->mimo_ps = smps;
		/* rtlpriv->cfg->ops->update_rate_tbl(hw, sta, 0, true); */

		info->control.rates[0].idx = 0;
		info->band = hw->conf.chandef.chan->band;
		rtlpriv->intf_ops->adapter_tx(hw, sta, skb, &tcb_desc);
	}
	return 1;

err_free:
	return 0;
}

void rtl_phy_scan_operation_backup(struct ieee80211_hw *hw, u8 operation)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	enum io_type iotype;

	if (!is_hal_stop(rtlhal)) {
		switch (operation) {
		case SCAN_OPT_BACKUP:
			iotype = IO_CMD_PAUSE_DM_BY_SCAN;
			rtlpriv->cfg->ops->set_hw_reg(hw,
						      HW_VAR_IO_CMD,
						      (u8 *)&iotype);
			break;
		case SCAN_OPT_RESTORE:
			iotype = IO_CMD_RESUME_DM_BY_SCAN;
			rtlpriv->cfg->ops->set_hw_reg(hw,
						      HW_VAR_IO_CMD,
						      (u8 *)&iotype);
			break;
		default:
			pr_err("Unknown Scan Backup operation.\n");
			break;
		}
	}
}

/* because mac80211 have issues when can receive del ba
 * so here we just make a fake del_ba if we receive a ba_req
 * but rx_agg was opened to let mac80211 release some ba
 * related resources, so please this del_ba for tx
 */
struct sk_buff *rtl_make_del_ba(struct ieee80211_hw *hw,
				u8 *sa, u8 *bssid, u16 tid)
{
	struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
	struct sk_buff *skb;
	struct ieee80211_mgmt *action_frame;
	u16 params;

	/* 27 = header + category + action + smps mode */
	skb = dev_alloc_skb(34 + hw->extra_tx_headroom);
	if (!skb)
		return NULL;

	skb_reserve(skb, hw->extra_tx_headroom);
	action_frame = skb_put_zero(skb, 34);
	memcpy(action_frame->sa, sa, ETH_ALEN);
	memcpy(action_frame->da, rtlefuse->dev_addr, ETH_ALEN);
	memcpy(action_frame->bssid, bssid, ETH_ALEN);
	action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
						  IEEE80211_STYPE_ACTION);
	action_frame->u.action.category = WLAN_CATEGORY_BACK;
	action_frame->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
	params = (u16)(1 << 11);	/* bit 11 initiator */
	params |= (u16)(tid << 12);	/* bit 15:12 TID number */

	action_frame->u.action.u.delba.params = cpu_to_le16(params);
	action_frame->u.action.u.delba.reason_code =
		cpu_to_le16(WLAN_REASON_QSTA_TIMEOUT);

	return skb;
}

bool rtl_check_beacon_key(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 rtl_phy *rtlphy = &rtlpriv->phy;
	struct ieee80211_hdr *hdr = data;
	struct ieee80211_ht_cap *ht_cap_ie;
	struct ieee80211_ht_operation *ht_oper_ie = NULL;
	struct rtl_beacon_keys bcn_key = {};
	struct rtl_beacon_keys *cur_bcn_key;
	u8 *ht_cap;
	u8 ht_cap_len;
	u8 *ht_oper;
	u8 ht_oper_len;
	u8 *ds_param;
	u8 ds_param_len;

	if (mac->opmode != NL80211_IFTYPE_STATION)
		return false;

	/* check if this really is a beacon*/
	if (!ieee80211_is_beacon(hdr->frame_control))
		return false;

	/* min. beacon length + FCS_LEN */
	if (len <= 40 + FCS_LEN)
		return false;

	cur_bcn_key = &mac->cur_beacon_keys;

	if (rtlpriv->mac80211.link_state == MAC80211_NOLINK) {
		if (cur_bcn_key->valid) {
			cur_bcn_key->valid = false;
			RT_TRACE(rtlpriv, COMP_BEACON, DBG_LOUD,
				 "Reset cur_beacon_keys.valid to false!\n");
		}
		return false;
	}

	/* and only beacons from the associated BSSID, please */
	if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
		return false;

	/***** Parsing DS Param IE ******/
	ds_param = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_DS_PARAMS);

	if (ds_param && !(ds_param[1] < sizeof(*ds_param))) {
		ds_param_len = ds_param[1];
		bcn_key.bcn_channel = ds_param[2];
	} else {
		ds_param = NULL;
	}

	/***** Parsing HT Cap. IE ******/
	ht_cap = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_HT_CAPABILITY);

	if (ht_cap && !(ht_cap[1] < sizeof(*ht_cap))) {
		ht_cap_len = ht_cap[1];
		ht_cap_ie = (struct ieee80211_ht_cap *)&ht_cap[2];
		bcn_key.ht_cap_info = ht_cap_ie->cap_info;
	} else  {
		ht_cap = NULL;
	}

	/***** Parsing HT Info. IE ******/
	ht_oper = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_HT_OPERATION);

	if (ht_oper && !(ht_oper[1] < sizeof(*ht_oper))) {
		ht_oper_len = ht_oper[1];
		ht_oper_ie = (struct ieee80211_ht_operation *)&ht_oper[2];
	} else {
		ht_oper = NULL;
	}

	/* update bcn_key */

	if (!ds_param && ht_oper && ht_oper_ie)
		bcn_key.bcn_channel = ht_oper_ie->primary_chan;

	if (ht_oper && ht_oper_ie)
		bcn_key.ht_info_infos_0_sco = ht_oper_ie->ht_param & 0x03;

	bcn_key.valid = true;

	/* update cur_beacon_keys or compare beacon key */
	if (rtlpriv->mac80211.link_state != MAC80211_LINKED &&
	    rtlpriv->mac80211.link_state != MAC80211_LINKED_SCANNING)
		return true;

	if (!cur_bcn_key->valid) {
		/* update cur_beacon_keys */
		memcpy(cur_bcn_key, &bcn_key, sizeof(bcn_key));
		cur_bcn_key->valid = true;

		RT_TRACE(rtlpriv, COMP_BEACON, DBG_LOUD,
			 "Beacon key update!ch=%d, ht_cap_info=0x%x, sco=0x%x\n",
			 cur_bcn_key->bcn_channel,
			 cur_bcn_key->ht_cap_info,
			 cur_bcn_key->ht_info_infos_0_sco);
		return true;
	}

	/* compare beacon key */
	if (!memcmp(cur_bcn_key, &bcn_key, sizeof(bcn_key))) {
		/* same beacon key */
		mac->new_beacon_cnt = 0;
		goto chk_exit;
	}

	if (cur_bcn_key->bcn_channel == bcn_key.bcn_channel &&
	    cur_bcn_key->ht_cap_info == bcn_key.ht_cap_info) {
		/* Beacon HT info IE, secondary channel offset check */
		/* 40M -> 20M */
		if (cur_bcn_key->ht_info_infos_0_sco >
		    bcn_key.ht_info_infos_0_sco) {
			/* Not a new beacon */
			RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
				 "Beacon BW change! sco:0x%x -> 0x%x\n",
				 cur_bcn_key->ht_info_infos_0_sco,
				 bcn_key.ht_info_infos_0_sco);

			cur_bcn_key->ht_info_infos_0_sco =
					bcn_key.ht_info_infos_0_sco;
		} else {
			/* 20M -> 40M */
			if (rtlphy->max_ht_chan_bw >= HT_CHANNEL_WIDTH_20_40) {
				/* Not a new beacon */
				RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
					 "Beacon BW change! sco:0x%x -> 0x%x\n",
					 cur_bcn_key->ht_info_infos_0_sco,
					 bcn_key.ht_info_infos_0_sco);

				cur_bcn_key->ht_info_infos_0_sco =
					bcn_key.ht_info_infos_0_sco;
			} else {
				mac->new_beacon_cnt++;
			}
		}
	} else {
		mac->new_beacon_cnt++;
	}

	if (mac->new_beacon_cnt == 1) {
		RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
			 "Get new beacon.\n");
		RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
			 "Cur : ch=%d, ht_cap=0x%x, sco=0x%x\n",
			 cur_bcn_key->bcn_channel,
			 cur_bcn_key->ht_cap_info,
			 cur_bcn_key->ht_info_infos_0_sco);
		RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
			 "New RX : ch=%d, ht_cap=0x%x, sco=0x%x\n",
			 bcn_key.bcn_channel,
			 bcn_key.ht_cap_info,
			 bcn_key.ht_info_infos_0_sco);

	} else if (mac->new_beacon_cnt > 1) {
		RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
			 "new beacon cnt: %d\n",
			 mac->new_beacon_cnt);
	}

	if (mac->new_beacon_cnt > 3) {
		ieee80211_connection_loss(rtlpriv->mac80211.vif);
		RT_TRACE(rtlpriv, COMP_BEACON, DBG_DMESG,
			 "new beacon cnt >3, disconnect !\n");
	}

chk_exit:

	return true;
}

/*********************************************************
 *
 * IOT functions
 *
 *********************************************************/
static bool rtl_chk_vendor_ouisub(struct ieee80211_hw *hw,
				  struct octet_string vendor_ie)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	bool matched = false;
	static u8 athcap_1[] = { 0x00, 0x03, 0x7F };
	static u8 athcap_2[] = { 0x00, 0x13, 0x74 };
	static u8 broadcap_1[] = { 0x00, 0x10, 0x18 };
	static u8 broadcap_2[] = { 0x00, 0x0a, 0xf7 };
	static u8 broadcap_3[] = { 0x00, 0x05, 0xb5 };
	static u8 racap[] = { 0x00, 0x0c, 0x43 };
	static u8 ciscocap[] = { 0x00, 0x40, 0x96 };
	static u8 marvcap[] = { 0x00, 0x50, 0x43 };

	if (memcmp(vendor_ie.octet, athcap_1, 3) == 0 ||
	    memcmp(vendor_ie.octet, athcap_2, 3) == 0) {
		rtlpriv->mac80211.vendor = PEER_ATH;
		matched = true;
	} else if (memcmp(vendor_ie.octet, broadcap_1, 3) == 0 ||
		   memcmp(vendor_ie.octet, broadcap_2, 3) == 0 ||
		   memcmp(vendor_ie.octet, broadcap_3, 3) == 0) {
		rtlpriv->mac80211.vendor = PEER_BROAD;
		matched = true;
	} else if (memcmp(vendor_ie.octet, racap, 3) == 0) {
		rtlpriv->mac80211.vendor = PEER_RAL;
		matched = true;
	} else if (memcmp(vendor_ie.octet, ciscocap, 3) == 0) {
		rtlpriv->mac80211.vendor = PEER_CISCO;
		matched = true;
	} else if (memcmp(vendor_ie.octet, marvcap, 3) == 0) {
		rtlpriv->mac80211.vendor = PEER_MARV;
		matched = true;
	}

	return matched;
}

static bool rtl_find_221_ie(struct ieee80211_hw *hw, u8 *data,
			    unsigned int len)
{
	struct ieee80211_mgmt *mgmt = (void *)data;
	struct octet_string vendor_ie;
	u8 *pos, *end;

	pos = (u8 *)mgmt->u.beacon.variable;
	end = data + len;
	while (pos < end) {
		if (pos[0] == 221) {
			vendor_ie.length = pos[1];
			vendor_ie.octet = &pos[2];
			if (rtl_chk_vendor_ouisub(hw, vendor_ie))
				return true;
		}

		if (pos + 2 + pos[1] > end)
			return false;

		pos += 2 + pos[1];
	}
	return false;
}

void rtl_recognize_peer(struct ieee80211_hw *hw, u8 *data, unsigned int len)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct ieee80211_hdr *hdr = (void *)data;
	u32 vendor = PEER_UNKNOWN;

	static u8 ap3_1[3] = { 0x00, 0x14, 0xbf };
	static u8 ap3_2[3] = { 0x00, 0x1a, 0x70 };
	static u8 ap3_3[3] = { 0x00, 0x1d, 0x7e };
	static u8 ap4_1[3] = { 0x00, 0x90, 0xcc };
	static u8 ap4_2[3] = { 0x00, 0x0e, 0x2e };
	static u8 ap4_3[3] = { 0x00, 0x18, 0x02 };
	static u8 ap4_4[3] = { 0x00, 0x17, 0x3f };
	static u8 ap4_5[3] = { 0x00, 0x1c, 0xdf };
	static u8 ap5_1[3] = { 0x00, 0x1c, 0xf0 };
	static u8 ap5_2[3] = { 0x00, 0x21, 0x91 };
	static u8 ap5_3[3] = { 0x00, 0x24, 0x01 };
	static u8 ap5_4[3] = { 0x00, 0x15, 0xe9 };
	static u8 ap5_5[3] = { 0x00, 0x17, 0x9A };
	static u8 ap5_6[3] = { 0x00, 0x18, 0xE7 };
	static u8 ap6_1[3] = { 0x00, 0x17, 0x94 };
	static u8 ap7_1[3] = { 0x00, 0x14, 0xa4 };

	if (mac->opmode != NL80211_IFTYPE_STATION)
		return;

	if (mac->link_state == MAC80211_NOLINK) {
		mac->vendor = PEER_UNKNOWN;
		return;
	}

	if (mac->cnt_after_linked > 2)
		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;

	if (rtl_find_221_ie(hw, data, len))
		vendor = mac->vendor;

	if ((memcmp(mac->bssid, ap5_1, 3) == 0) ||
	    (memcmp(mac->bssid, ap5_2, 3) == 0) ||
	    (memcmp(mac->bssid, ap5_3, 3) == 0) ||
	    (memcmp(mac->bssid, ap5_4, 3) == 0) ||
	    (memcmp(mac->bssid, ap5_5, 3) == 0) ||
	    (memcmp(mac->bssid, ap5_6, 3) == 0) ||
	    vendor == PEER_ATH) {
		vendor = PEER_ATH;
		RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>ath find\n");
	} else if ((memcmp(mac->bssid, ap4_4, 3) == 0) ||
		(memcmp(mac->bssid, ap4_5, 3) == 0) ||
		(memcmp(mac->bssid, ap4_1, 3) == 0) ||
		(memcmp(mac->bssid, ap4_2, 3) == 0) ||
		(memcmp(mac->bssid, ap4_3, 3) == 0) ||
		vendor == PEER_RAL) {
		RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>ral find\n");
		vendor = PEER_RAL;
	} else if (memcmp(mac->bssid, ap6_1, 3) == 0 ||
		vendor == PEER_CISCO) {
		vendor = PEER_CISCO;
		RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>cisco find\n");
	} else if ((memcmp(mac->bssid, ap3_1, 3) == 0) ||
		(memcmp(mac->bssid, ap3_2, 3) == 0) ||
		(memcmp(mac->bssid, ap3_3, 3) == 0) ||
		vendor == PEER_BROAD) {
		RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>broad find\n");
		vendor = PEER_BROAD;
	} else if (memcmp(mac->bssid, ap7_1, 3) == 0 ||
		vendor == PEER_MARV) {
		vendor = PEER_MARV;
		RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>marv find\n");
	}

	mac->vendor = vendor;
}

MODULE_AUTHOR("lizhaoming	<chaoming_li@realsil.com.cn>");
MODULE_AUTHOR("Realtek WlanFAE	<wlanfae@realtek.com>");
MODULE_AUTHOR("Larry Finger	<Larry.FInger@lwfinger.net>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Realtek 802.11n PCI wireless core");

struct rtl_global_var rtl_global_var = {};

int rtl_core_module_init(void)
{
	if (rtl_rate_control_register())
		pr_err("rtl: Unable to register rtl_rc, use default RC !!\n");

	/* add debugfs */
	rtl_debugfs_add_topdir();

	/* init some global vars */
	INIT_LIST_HEAD(&rtl_global_var.glb_priv_list);
	spin_lock_init(&rtl_global_var.glb_list_lock);

	return 0;
}

void rtl_core_module_exit(void)
{
	/*RC*/
	rtl_rate_control_unregister();

	/* remove debugfs */
	rtl_debugfs_remove_topdir();
}