drivers/net/wireless/realtek/rtlwifi/rtl8192ce/trx.c

/******************************************************************************
 *
 * 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 "../pci.h"
#include "../base.h"
#include "../stats.h"
#include "reg.h"
#include "def.h"
#include "phy.h"
#include "trx.h"
#include "led.h"

static u8 _rtl92ce_map_hwqueue_to_fwqueue(struct sk_buff *skb, u8 hw_queue)
{
	__le16 fc = rtl_get_fc(skb);

	if (unlikely(ieee80211_is_beacon(fc)))
		return QSLT_BEACON;
	if (ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc))
		return QSLT_MGNT;

	return skb->priority;
}

static u8 _rtl92c_query_rxpwrpercentage(s8 antpower)
{
	if ((antpower <= -100) || (antpower >= 20))
		return 0;
	else if (antpower >= 0)
		return 100;
	else
		return 100 + antpower;
}

static u8 _rtl92c_evm_db_to_percentage(s8 value)
{
	s8 ret_val;
	ret_val = value;

	if (ret_val >= 0)
		ret_val = 0;

	if (ret_val <= -33)
		ret_val = -33;

	ret_val = 0 - ret_val;
	ret_val *= 3;

	if (ret_val == 99)
		ret_val = 100;

	return ret_val;
}

static long _rtl92ce_signal_scale_mapping(struct ieee80211_hw *hw,
		long currsig)
{
	long retsig;

	if (currsig >= 61 && currsig <= 100)
		retsig = 90 + ((currsig - 60) / 4);
	else if (currsig >= 41 && currsig <= 60)
		retsig = 78 + ((currsig - 40) / 2);
	else if (currsig >= 31 && currsig <= 40)
		retsig = 66 + (currsig - 30);
	else if (currsig >= 21 && currsig <= 30)
		retsig = 54 + (currsig - 20);
	else if (currsig >= 5 && currsig <= 20)
		retsig = 42 + (((currsig - 5) * 2) / 3);
	else if (currsig == 4)
		retsig = 36;
	else if (currsig == 3)
		retsig = 27;
	else if (currsig == 2)
		retsig = 18;
	else if (currsig == 1)
		retsig = 9;
	else
		retsig = currsig;

	return retsig;
}

static void _rtl92ce_query_rxphystatus(struct ieee80211_hw *hw,
				       struct rtl_stats *pstats,
				       struct rx_desc_92c *pdesc,
				       struct rx_fwinfo_92c *p_drvinfo,
				       bool packet_match_bssid,
				       bool packet_toself,
				       bool packet_beacon)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct phy_sts_cck_8192s_t *cck_buf;
	struct rtl_ps_ctl *ppsc = rtl_psc(rtlpriv);
	s8 rx_pwr_all = 0, rx_pwr[4];
	u8 evm, pwdb_all, rf_rx_num = 0;
	u8 i, max_spatial_stream;
	u32 rssi, total_rssi = 0;
	bool is_cck_rate;

	is_cck_rate = RX_HAL_IS_CCK_RATE(pdesc->rxmcs);
	pstats->packet_matchbssid = packet_match_bssid;
	pstats->packet_toself = packet_toself;
	pstats->is_cck = is_cck_rate;
	pstats->packet_beacon = packet_beacon;
	pstats->rx_mimo_sig_qual[0] = -1;
	pstats->rx_mimo_sig_qual[1] = -1;

	if (is_cck_rate) {
		u8 report, cck_highpwr;
		cck_buf = (struct phy_sts_cck_8192s_t *)p_drvinfo;

		if (ppsc->rfpwr_state == ERFON)
			cck_highpwr = (u8) rtl_get_bbreg(hw,
						 RFPGA0_XA_HSSIPARAMETER2,
						 BIT(9));
		else
			cck_highpwr = false;

		if (!cck_highpwr) {
			u8 cck_agc_rpt = cck_buf->cck_agc_rpt;
			report = cck_buf->cck_agc_rpt & 0xc0;
			report = report >> 6;
			switch (report) {
			case 0x3:
				rx_pwr_all = -46 - (cck_agc_rpt & 0x3e);
				break;
			case 0x2:
				rx_pwr_all = -26 - (cck_agc_rpt & 0x3e);
				break;
			case 0x1:
				rx_pwr_all = -12 - (cck_agc_rpt & 0x3e);
				break;
			case 0x0:
				rx_pwr_all = 16 - (cck_agc_rpt & 0x3e);
				break;
			}
		} else {
			u8 cck_agc_rpt = cck_buf->cck_agc_rpt;
			report = p_drvinfo->cfosho[0] & 0x60;
			report = report >> 5;
			switch (report) {
			case 0x3:
				rx_pwr_all = -46 - ((cck_agc_rpt & 0x1f) << 1);
				break;
			case 0x2:
				rx_pwr_all = -26 - ((cck_agc_rpt & 0x1f) << 1);
				break;
			case 0x1:
				rx_pwr_all = -12 - ((cck_agc_rpt & 0x1f) << 1);
				break;
			case 0x0:
				rx_pwr_all = 16 - ((cck_agc_rpt & 0x1f) << 1);
				break;
			}
		}

		pwdb_all = rtl_query_rxpwrpercentage(rx_pwr_all);
		/* CCK gain is smaller than OFDM/MCS gain,
		 * so we add gain diff by experiences,
		 * the val is 6
		 */
		pwdb_all += 6;
		if (pwdb_all > 100)
			pwdb_all = 100;
		/* modify the offset to make the same
		 * gain index with OFDM.
		 */
		if (pwdb_all > 34 && pwdb_all <= 42)
			pwdb_all -= 2;
		else if (pwdb_all > 26 && pwdb_all <= 34)
			pwdb_all -= 6;
		else if (pwdb_all > 14 && pwdb_all <= 26)
			pwdb_all -= 8;
		else if (pwdb_all > 4 && pwdb_all <= 14)
			pwdb_all -= 4;

		pstats->rx_pwdb_all = pwdb_all;
		pstats->recvsignalpower = rx_pwr_all;

		/* (3) Get Signal Quality (EVM) */
		if (packet_match_bssid) {
			u8 sq;
			if (pstats->rx_pwdb_all > 40)
				sq = 100;
			else {
				sq = cck_buf->sq_rpt;
				if (sq > 64)
					sq = 0;
				else if (sq < 20)
					sq = 100;
				else
					sq = ((64 - sq) * 100) / 44;
			}

			pstats->signalquality = sq;
			pstats->rx_mimo_sig_qual[0] = sq;
			pstats->rx_mimo_sig_qual[1] = -1;
		}
	} else {
		rtlpriv->dm.rfpath_rxenable[0] =
		    rtlpriv->dm.rfpath_rxenable[1] = true;
		/* (1)Get RSSI for HT rate */
		for (i = RF90_PATH_A; i < RF90_PATH_MAX; i++) {
			/* we will judge RF RX path now. */
			if (rtlpriv->dm.rfpath_rxenable[i])
				rf_rx_num++;

			rx_pwr[i] =
			    ((p_drvinfo->gain_trsw[i] & 0x3f) * 2) - 110;
			/* Translate DBM to percentage. */
			rssi = _rtl92c_query_rxpwrpercentage(rx_pwr[i]);
			total_rssi += rssi;
			/* Get Rx snr value in DB */
			rtlpriv->stats.rx_snr_db[i] =
			    (long)(p_drvinfo->rxsnr[i] / 2);

			/* Record Signal Strength for next packet */
			if (packet_match_bssid)
				pstats->rx_mimo_signalstrength[i] = (u8) rssi;
		}

		/* (2)PWDB, Average PWDB cacluated by
		 * hardware (for rate adaptive)
		 */
		rx_pwr_all = ((p_drvinfo->pwdb_all >> 1) & 0x7f) - 110;
		pwdb_all = _rtl92c_query_rxpwrpercentage(rx_pwr_all);
		pstats->rx_pwdb_all = pwdb_all;
		pstats->rxpower = rx_pwr_all;
		pstats->recvsignalpower = rx_pwr_all;

		/* (3)EVM of HT rate */
		if (pstats->is_ht && pstats->rate >= DESC_RATEMCS8 &&
		    pstats->rate <= DESC_RATEMCS15)
			max_spatial_stream = 2;
		else
			max_spatial_stream = 1;

		for (i = 0; i < max_spatial_stream; i++) {
			evm = _rtl92c_evm_db_to_percentage(p_drvinfo->rxevm[i]);

			if (packet_match_bssid) {
				/* Fill value in RFD, Get the first
				 * spatial stream only
				 */
				if (i == 0)
					pstats->signalquality =
					    (u8) (evm & 0xff);
				pstats->rx_mimo_sig_qual[i] = (u8) (evm & 0xff);
			}
		}
	}

	/* UI BSS List signal strength(in percentage),
	 * make it good looking, from 0~100.
	 */
	if (is_cck_rate)
		pstats->signalstrength =
		    (u8) (_rtl92ce_signal_scale_mapping(hw, pwdb_all));
	else if (rf_rx_num != 0)
		pstats->signalstrength =
		    (u8) (_rtl92ce_signal_scale_mapping
			  (hw, total_rssi /= rf_rx_num));
}

static void _rtl92ce_translate_rx_signal_stuff(struct ieee80211_hw *hw,
					       struct sk_buff *skb,
					       struct rtl_stats *pstats,
					       struct rx_desc_92c *pdesc,
					       struct rx_fwinfo_92c *p_drvinfo)
{
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));

	struct ieee80211_hdr *hdr;
	u8 *tmp_buf;
	u8 *praddr;
	__le16 fc;
	u16 type, c_fc;
	bool packet_matchbssid, packet_toself, packet_beacon = false;

	tmp_buf = skb->data + pstats->rx_drvinfo_size + pstats->rx_bufshift;

	hdr = (struct ieee80211_hdr *)tmp_buf;
	fc = hdr->frame_control;
	c_fc = le16_to_cpu(fc);
	type = WLAN_FC_GET_TYPE(fc);
	praddr = hdr->addr1;

	packet_matchbssid =
	    ((IEEE80211_FTYPE_CTL != type) &&
	     ether_addr_equal(mac->bssid,
			      (c_fc & IEEE80211_FCTL_TODS) ? hdr->addr1 :
			      (c_fc & IEEE80211_FCTL_FROMDS) ? hdr->addr2 :
			      hdr->addr3) &&
	     (!pstats->hwerror) && (!pstats->crc) && (!pstats->icv));

	packet_toself = packet_matchbssid &&
	     ether_addr_equal(praddr, rtlefuse->dev_addr);

	if (ieee80211_is_beacon(fc))
		packet_beacon = true;

	_rtl92ce_query_rxphystatus(hw, pstats, pdesc, p_drvinfo,
				   packet_matchbssid, packet_toself,
				   packet_beacon);

	rtl_process_phyinfo(hw, tmp_buf, pstats);
}

bool rtl92ce_rx_query_desc(struct ieee80211_hw *hw,
			   struct rtl_stats *stats,
			   struct ieee80211_rx_status *rx_status,
			   u8 *p_desc, struct sk_buff *skb)
{
	struct rx_fwinfo_92c *p_drvinfo;
	struct rx_desc_92c *pdesc = (struct rx_desc_92c *)p_desc;
	struct ieee80211_hdr *hdr;
	u32 phystatus = GET_RX_DESC_PHYST(pdesc);
	stats->length = (u16) GET_RX_DESC_PKT_LEN(pdesc);
	stats->rx_drvinfo_size = (u8) GET_RX_DESC_DRV_INFO_SIZE(pdesc) *
	    RX_DRV_INFO_SIZE_UNIT;
	stats->rx_bufshift = (u8) (GET_RX_DESC_SHIFT(pdesc) & 0x03);
	stats->icv = (u16) GET_RX_DESC_ICV(pdesc);
	stats->crc = (u16) GET_RX_DESC_CRC32(pdesc);
	stats->hwerror = (stats->crc | stats->icv);
	stats->decrypted = !GET_RX_DESC_SWDEC(pdesc);
	stats->rate = (u8) GET_RX_DESC_RXMCS(pdesc);
	stats->shortpreamble = (u16) GET_RX_DESC_SPLCP(pdesc);
	stats->isampdu = (bool) (GET_RX_DESC_PAGGR(pdesc) == 1);
	stats->isfirst_ampdu = (bool) ((GET_RX_DESC_PAGGR(pdesc) == 1)
				   && (GET_RX_DESC_FAGGR(pdesc) == 1));
	stats->timestamp_low = GET_RX_DESC_TSFL(pdesc);
	stats->rx_is40Mhzpacket = (bool) GET_RX_DESC_BW(pdesc);
	stats->is_ht = (bool)GET_RX_DESC_RXHT(pdesc);

	stats->is_cck = RX_HAL_IS_CCK_RATE(pdesc->rxmcs);

	rx_status->freq = hw->conf.chandef.chan->center_freq;
	rx_status->band = hw->conf.chandef.chan->band;

	hdr = (struct ieee80211_hdr *)(skb->data + stats->rx_drvinfo_size
			+ stats->rx_bufshift);

	if (stats->crc)
		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;

	if (stats->rx_is40Mhzpacket)
		rx_status->bw = RATE_INFO_BW_40;

	if (stats->is_ht)
		rx_status->encoding = RX_ENC_HT;

	rx_status->flag |= RX_FLAG_MACTIME_START;

	/* hw will set stats->decrypted true, if it finds the
	 * frame is open data frame or mgmt frame.
	 * So hw will not decryption robust managment frame
	 * for IEEE80211w but still set status->decrypted
	 * true, so here we should set it back to undecrypted
	 * for IEEE80211w frame, and mac80211 sw will help
	 * to decrypt it
	 */
	if (stats->decrypted) {
		if ((_ieee80211_is_robust_mgmt_frame(hdr)) &&
		    (ieee80211_has_protected(hdr->frame_control)))
			rx_status->flag &= ~RX_FLAG_DECRYPTED;
		else
			rx_status->flag |= RX_FLAG_DECRYPTED;
	}
	/* rate_idx: index of data rate into band's
	 * supported rates or MCS index if HT rates
	 * are use (RX_FLAG_HT)
	 * Notice: this is diff with windows define
	 */
	rx_status->rate_idx = rtlwifi_rate_mapping(hw, stats->is_ht,
						   false, stats->rate);

	rx_status->mactime = stats->timestamp_low;
	if (phystatus) {
		p_drvinfo = (struct rx_fwinfo_92c *)(skb->data +
						     stats->rx_bufshift);

		_rtl92ce_translate_rx_signal_stuff(hw,
						   skb, stats, pdesc,
						   p_drvinfo);
	}

	/*rx_status->qual = stats->signal; */
	rx_status->signal = stats->recvsignalpower + 10;

	return true;
}

void rtl92ce_tx_fill_desc(struct ieee80211_hw *hw,
			  struct ieee80211_hdr *hdr, u8 *pdesc_tx,
			  u8 *pbd_desc_tx, struct ieee80211_tx_info *info,
			  struct ieee80211_sta *sta,
			  struct sk_buff *skb,
			  u8 hw_queue, struct rtl_tcb_desc *tcb_desc)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	bool defaultadapter = true;
	u8 *pdesc = pdesc_tx;
	u16 seq_number;
	__le16 fc = hdr->frame_control;
	u8 fw_qsel = _rtl92ce_map_hwqueue_to_fwqueue(skb, hw_queue);
	bool firstseg = ((hdr->seq_ctrl &
			  cpu_to_le16(IEEE80211_SCTL_FRAG)) == 0);

	bool lastseg = ((hdr->frame_control &
			 cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) == 0);

	dma_addr_t mapping = pci_map_single(rtlpci->pdev,
					    skb->data, skb->len,
					    PCI_DMA_TODEVICE);

	u8 bw_40 = 0;

	if (pci_dma_mapping_error(rtlpci->pdev, mapping)) {
		RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE,
			 "DMA mapping error\n");
		return;
	}
	rcu_read_lock();
	sta = get_sta(hw, mac->vif, mac->bssid);
	if (mac->opmode == NL80211_IFTYPE_STATION) {
		bw_40 = mac->bw_40;
	} else if (mac->opmode == NL80211_IFTYPE_AP ||
		   mac->opmode == NL80211_IFTYPE_ADHOC ||
		   mac->opmode == NL80211_IFTYPE_MESH_POINT) {
		if (sta)
			bw_40 = sta->bandwidth >= IEEE80211_STA_RX_BW_40;
	}

	seq_number = (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4;

	rtl_get_tcb_desc(hw, info, sta, skb, tcb_desc);

	CLEAR_PCI_TX_DESC_CONTENT(pdesc, sizeof(struct tx_desc_92c));

	if (ieee80211_is_nullfunc(fc) || ieee80211_is_ctl(fc)) {
		firstseg = true;
		lastseg = true;
	}
	if (firstseg) {
		SET_TX_DESC_OFFSET(pdesc, USB_HWDESC_HEADER_LEN);

		SET_TX_DESC_TX_RATE(pdesc, tcb_desc->hw_rate);

		if (tcb_desc->use_shortgi || tcb_desc->use_shortpreamble)
			SET_TX_DESC_DATA_SHORTGI(pdesc, 1);

		if (info->flags & IEEE80211_TX_CTL_AMPDU) {
			SET_TX_DESC_AGG_BREAK(pdesc, 1);
			SET_TX_DESC_MAX_AGG_NUM(pdesc, 0x14);
		}
		SET_TX_DESC_SEQ(pdesc, seq_number);

		SET_TX_DESC_RTS_ENABLE(pdesc, ((tcb_desc->rts_enable &&
						!tcb_desc->
						cts_enable) ? 1 : 0));
		SET_TX_DESC_HW_RTS_ENABLE(pdesc,
					  ((tcb_desc->rts_enable
					    || tcb_desc->cts_enable) ? 1 : 0));
		SET_TX_DESC_CTS2SELF(pdesc, ((tcb_desc->cts_enable) ? 1 : 0));
		SET_TX_DESC_RTS_STBC(pdesc, ((tcb_desc->rts_stbc) ? 1 : 0));

		SET_TX_DESC_RTS_RATE(pdesc, tcb_desc->rts_rate);
		SET_TX_DESC_RTS_BW(pdesc, 0);
		SET_TX_DESC_RTS_SC(pdesc, tcb_desc->rts_sc);
		SET_TX_DESC_RTS_SHORT(pdesc,
				      ((tcb_desc->rts_rate <= DESC_RATE54M) ?
				       (tcb_desc->rts_use_shortpreamble ? 1 : 0)
				       : (tcb_desc->rts_use_shortgi ? 1 : 0)));

		if (bw_40) {
			if (tcb_desc->packet_bw) {
				SET_TX_DESC_DATA_BW(pdesc, 1);
				SET_TX_DESC_TX_SUB_CARRIER(pdesc, 3);
			} else {
				SET_TX_DESC_DATA_BW(pdesc, 0);
				SET_TX_DESC_TX_SUB_CARRIER(pdesc,
						 mac->cur_40_prime_sc);
			}
		} else {
			SET_TX_DESC_DATA_BW(pdesc, 0);
			SET_TX_DESC_TX_SUB_CARRIER(pdesc, 0);
		}

		SET_TX_DESC_LINIP(pdesc, 0);
		SET_TX_DESC_PKT_SIZE(pdesc, (u16) skb->len);

		if (sta) {
			u8 ampdu_density = sta->ht_cap.ampdu_density;
			SET_TX_DESC_AMPDU_DENSITY(pdesc, ampdu_density);
		}

		if (info->control.hw_key) {
			struct ieee80211_key_conf *keyconf =
			    info->control.hw_key;

			switch (keyconf->cipher) {
			case WLAN_CIPHER_SUITE_WEP40:
			case WLAN_CIPHER_SUITE_WEP104:
			case WLAN_CIPHER_SUITE_TKIP:
				SET_TX_DESC_SEC_TYPE(pdesc, 0x1);
				break;
			case WLAN_CIPHER_SUITE_CCMP:
				SET_TX_DESC_SEC_TYPE(pdesc, 0x3);
				break;
			default:
				SET_TX_DESC_SEC_TYPE(pdesc, 0x0);
				break;

			}
		}

		SET_TX_DESC_PKT_ID(pdesc, 0);
		SET_TX_DESC_QUEUE_SEL(pdesc, fw_qsel);

		SET_TX_DESC_DATA_RATE_FB_LIMIT(pdesc, 0x1F);
		SET_TX_DESC_RTS_RATE_FB_LIMIT(pdesc, 0xF);
		SET_TX_DESC_DISABLE_FB(pdesc, 0);
		SET_TX_DESC_USE_RATE(pdesc, tcb_desc->use_driver_rate ? 1 : 0);

		if (ieee80211_is_data_qos(fc)) {
			if (mac->rdg_en) {
				RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE,
					 "Enable RDG function\n");
				SET_TX_DESC_RDG_ENABLE(pdesc, 1);
				SET_TX_DESC_HTC(pdesc, 1);
			}
		}
	}
	rcu_read_unlock();

	SET_TX_DESC_FIRST_SEG(pdesc, (firstseg ? 1 : 0));
	SET_TX_DESC_LAST_SEG(pdesc, (lastseg ? 1 : 0));

	SET_TX_DESC_TX_BUFFER_SIZE(pdesc, (u16) skb->len);

	SET_TX_DESC_TX_BUFFER_ADDRESS(pdesc, mapping);

	if (rtlpriv->dm.useramask) {
		SET_TX_DESC_RATE_ID(pdesc, tcb_desc->ratr_index);
		SET_TX_DESC_MACID(pdesc, tcb_desc->mac_id);
	} else {
		SET_TX_DESC_RATE_ID(pdesc, 0xC + tcb_desc->ratr_index);
		SET_TX_DESC_MACID(pdesc, tcb_desc->ratr_index);
	}

	if ((!ieee80211_is_data_qos(fc)) && ppsc->fwctrl_lps) {
		SET_TX_DESC_HWSEQ_EN(pdesc, 1);
		SET_TX_DESC_PKT_ID(pdesc, 8);

		if (!defaultadapter)
			SET_TX_DESC_QOS(pdesc, 1);
	}

	SET_TX_DESC_MORE_FRAG(pdesc, (lastseg ? 0 : 1));

	if (is_multicast_ether_addr(ieee80211_get_DA(hdr)) ||
	    is_broadcast_ether_addr(ieee80211_get_DA(hdr))) {
		SET_TX_DESC_BMC(pdesc, 1);
	}

	RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE, "\n");
}

void rtl92ce_tx_fill_cmddesc(struct ieee80211_hw *hw,
			     u8 *pdesc, bool firstseg,
			     bool lastseg, struct sk_buff *skb)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
	u8 fw_queue = QSLT_BEACON;

	dma_addr_t mapping = pci_map_single(rtlpci->pdev,
					    skb->data, skb->len,
					    PCI_DMA_TODEVICE);

	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
	__le16 fc = hdr->frame_control;

	if (pci_dma_mapping_error(rtlpci->pdev, mapping)) {
		RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE,
			 "DMA mapping error\n");
		return;
	}
	CLEAR_PCI_TX_DESC_CONTENT(pdesc, TX_DESC_SIZE);

	if (firstseg)
		SET_TX_DESC_OFFSET(pdesc, USB_HWDESC_HEADER_LEN);

	SET_TX_DESC_TX_RATE(pdesc, DESC_RATE1M);

	SET_TX_DESC_SEQ(pdesc, 0);

	SET_TX_DESC_LINIP(pdesc, 0);

	SET_TX_DESC_QUEUE_SEL(pdesc, fw_queue);

	SET_TX_DESC_FIRST_SEG(pdesc, 1);
	SET_TX_DESC_LAST_SEG(pdesc, 1);

	SET_TX_DESC_TX_BUFFER_SIZE(pdesc, (u16) (skb->len));

	SET_TX_DESC_TX_BUFFER_ADDRESS(pdesc, mapping);

	SET_TX_DESC_RATE_ID(pdesc, 7);
	SET_TX_DESC_MACID(pdesc, 0);

	SET_TX_DESC_OWN(pdesc, 1);

	SET_TX_DESC_PKT_SIZE(pdesc, (u16) (skb->len));

	SET_TX_DESC_FIRST_SEG(pdesc, 1);
	SET_TX_DESC_LAST_SEG(pdesc, 1);

	SET_TX_DESC_OFFSET(pdesc, 0x20);

	SET_TX_DESC_USE_RATE(pdesc, 1);

	if (!ieee80211_is_data_qos(fc)) {
		SET_TX_DESC_HWSEQ_EN(pdesc, 1);
		SET_TX_DESC_PKT_ID(pdesc, 8);
	}

	RT_PRINT_DATA(rtlpriv, COMP_CMD, DBG_LOUD,
		      "H2C Tx Cmd Content", pdesc, TX_DESC_SIZE);
}

void rtl92ce_set_desc(struct ieee80211_hw *hw, u8 *pdesc, bool istx,
		      u8 desc_name, u8 *val)
{
	if (istx) {
		switch (desc_name) {
		case HW_DESC_OWN:
			wmb();
			SET_TX_DESC_OWN(pdesc, 1);
			break;
		case HW_DESC_TX_NEXTDESC_ADDR:
			SET_TX_DESC_NEXT_DESC_ADDRESS(pdesc, *(u32 *) val);
			break;
		default:
			WARN_ONCE(true, "rtl8192ce: ERR txdesc :%d not processed\n",
				  desc_name);
			break;
		}
	} else {
		switch (desc_name) {
		case HW_DESC_RXOWN:
			wmb();
			SET_RX_DESC_OWN(pdesc, 1);
			break;
		case HW_DESC_RXBUFF_ADDR:
			SET_RX_DESC_BUFF_ADDR(pdesc, *(u32 *) val);
			break;
		case HW_DESC_RXPKT_LEN:
			SET_RX_DESC_PKT_LEN(pdesc, *(u32 *) val);
			break;
		case HW_DESC_RXERO:
			SET_RX_DESC_EOR(pdesc, 1);
			break;
		default:
			WARN_ONCE(true, "rtl8192ce: ERR rxdesc :%d not processed\n",
				  desc_name);
			break;
		}
	}
}

u64 rtl92ce_get_desc(struct ieee80211_hw *hw, u8 *p_desc,
		     bool istx, u8 desc_name)
{
	u32 ret = 0;

	if (istx) {
		switch (desc_name) {
		case HW_DESC_OWN:
			ret = GET_TX_DESC_OWN(p_desc);
			break;
		case HW_DESC_TXBUFF_ADDR:
			ret = GET_TX_DESC_TX_BUFFER_ADDRESS(p_desc);
			break;
		default:
			WARN_ONCE(true, "rtl8192ce: ERR txdesc :%d not processed\n",
				  desc_name);
			break;
		}
	} else {
		switch (desc_name) {
		case HW_DESC_OWN:
			ret = GET_RX_DESC_OWN(p_desc);
			break;
		case HW_DESC_RXPKT_LEN:
			ret = GET_RX_DESC_PKT_LEN(p_desc);
			break;
		case HW_DESC_RXBUFF_ADDR:
			ret = GET_RX_DESC_BUFF_ADDR(p_desc);
			break;
		default:
			WARN_ONCE(true, "rtl8192ce: ERR rxdesc :%d not processed\n",
				  desc_name);
			break;
		}
	}
	return ret;
}

bool rtl92ce_is_tx_desc_closed(struct ieee80211_hw *hw,
			       u8 hw_queue, u16 index)
{
	struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
	struct rtl8192_tx_ring *ring = &rtlpci->tx_ring[hw_queue];
	u8 *entry = (u8 *)(&ring->desc[ring->idx]);
	u8 own = (u8)rtl92ce_get_desc(hw, entry, true, HW_DESC_OWN);

	/*beacon packet will only use the first
	 *descriptor defautly,and the own may not
	 *be cleared by the hardware
	 */
	if (own)
		return false;
	return true;
}

void rtl92ce_tx_polling(struct ieee80211_hw *hw, u8 hw_queue)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	if (hw_queue == BEACON_QUEUE) {
		rtl_write_word(rtlpriv, REG_PCIE_CTRL_REG, BIT(4));
	} else {
		rtl_write_word(rtlpriv, REG_PCIE_CTRL_REG,
			       BIT(0) << (hw_queue));
	}
}