drivers/net/wireless/b43legacy/xmit.c - maze/linux - Git at Google

 /*

   Broadcom B43legacy wireless driver

   Transmission (TX/RX) related functions.

   Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
   Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
   Copyright (C) 2005, 2006 Michael Buesch <mb@bu3sch.de>
   Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
   Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
   Copyright (C) 2007 Larry Finger <Larry.Finger@lwfinger.net>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   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.

   You should have received a copy of the GNU General Public License
   along with this program; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
   Boston, MA 02110-1301, USA.

 */

 #include <net/dst.h>

 #include "xmit.h"
 #include "phy.h"
 #include "dma.h"
 #include "pio.h"


 /* Extract the bitrate out of a CCK PLCP header. */
 static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
 {
 	switch (plcp->raw[0]) {
 	case 0x0A:
 		return 0;
 	case 0x14:
 		return 1;
 	case 0x37:
 		return 2;
 	case 0x6E:
 		return 3;
 	}
 	B43legacy_BUG_ON(1);
 	return -1;
 }

 /* Extract the bitrate out of an OFDM PLCP header. */
 static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
 					      bool aphy)
 {
 	int base = aphy ? 0 : 4;

 	switch (plcp->raw[0] & 0xF) {
 	case 0xB:
 		return base + 0;
 	case 0xF:
 		return base + 1;
 	case 0xA:
 		return base + 2;
 	case 0xE:
 		return base + 3;
 	case 0x9:
 		return base + 4;
 	case 0xD:
 		return base + 5;
 	case 0x8:
 		return base + 6;
 	case 0xC:
 		return base + 7;
 	}
 	B43legacy_BUG_ON(1);
 	return -1;
 }

 u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
 {
 	switch (bitrate) {
 	case B43legacy_CCK_RATE_1MB:
 		return 0x0A;
 	case B43legacy_CCK_RATE_2MB:
 		return 0x14;
 	case B43legacy_CCK_RATE_5MB:
 		return 0x37;
 	case B43legacy_CCK_RATE_11MB:
 		return 0x6E;
 	}
 	B43legacy_BUG_ON(1);
 	return 0;
 }

 u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
 {
 	switch (bitrate) {
 	case B43legacy_OFDM_RATE_6MB:
 		return 0xB;
 	case B43legacy_OFDM_RATE_9MB:
 		return 0xF;
 	case B43legacy_OFDM_RATE_12MB:
 		return 0xA;
 	case B43legacy_OFDM_RATE_18MB:
 		return 0xE;
 	case B43legacy_OFDM_RATE_24MB:
 		return 0x9;
 	case B43legacy_OFDM_RATE_36MB:
 		return 0xD;
 	case B43legacy_OFDM_RATE_48MB:
 		return 0x8;
 	case B43legacy_OFDM_RATE_54MB:
 		return 0xC;
 	}
 	B43legacy_BUG_ON(1);
 	return 0;
 }

 void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
 				 const u16 octets, const u8 bitrate)
 {
 	__le32 *data = &(plcp->data);
 	__u8 *raw = plcp->raw;

 	if (b43legacy_is_ofdm_rate(bitrate)) {
 		u16 d;

 		d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
 		B43legacy_WARN_ON(octets & 0xF000);
 		d |= (octets << 5);
 		*data = cpu_to_le32(d);
 	} else {
 		u32 plen;

 		plen = octets * 16 / bitrate;
 		if ((octets * 16 % bitrate) > 0) {
 			plen++;
 			if ((bitrate == B43legacy_CCK_RATE_11MB)
 			    && ((octets * 8 % 11) < 4))
 				raw[1] = 0x84;
 			else
 				raw[1] = 0x04;
 		} else
 			raw[1] = 0x04;
 		*data |= cpu_to_le32(plen << 16);
 		raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
 	}
 }

 static u8 b43legacy_calc_fallback_rate(u8 bitrate)
 {
 	switch (bitrate) {
 	case B43legacy_CCK_RATE_1MB:
 		return B43legacy_CCK_RATE_1MB;
 	case B43legacy_CCK_RATE_2MB:
 		return B43legacy_CCK_RATE_1MB;
 	case B43legacy_CCK_RATE_5MB:
 		return B43legacy_CCK_RATE_2MB;
 	case B43legacy_CCK_RATE_11MB:
 		return B43legacy_CCK_RATE_5MB;
 	case B43legacy_OFDM_RATE_6MB:
 		return B43legacy_CCK_RATE_5MB;
 	case B43legacy_OFDM_RATE_9MB:
 		return B43legacy_OFDM_RATE_6MB;
 	case B43legacy_OFDM_RATE_12MB:
 		return B43legacy_OFDM_RATE_9MB;
 	case B43legacy_OFDM_RATE_18MB:
 		return B43legacy_OFDM_RATE_12MB;
 	case B43legacy_OFDM_RATE_24MB:
 		return B43legacy_OFDM_RATE_18MB;
 	case B43legacy_OFDM_RATE_36MB:
 		return B43legacy_OFDM_RATE_24MB;
 	case B43legacy_OFDM_RATE_48MB:
 		return B43legacy_OFDM_RATE_36MB;
 	case B43legacy_OFDM_RATE_54MB:
 		return B43legacy_OFDM_RATE_48MB;
 	}
 	B43legacy_BUG_ON(1);
 	return 0;
 }

 static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
 			       struct b43legacy_txhdr_fw3 *txhdr,
 			       const unsigned char *fragment_data,
 			       unsigned int fragment_len,
 			       const struct ieee80211_tx_info *info,
 			       u16 cookie)
 {
 	const struct ieee80211_hdr *wlhdr;
 	int use_encryption = !!info->control.hw_key;
 	u8 rate;
 	struct ieee80211_rate *rate_fb;
 	int rate_ofdm;
 	int rate_fb_ofdm;
 	unsigned int plcp_fragment_len;
 	u32 mac_ctl = 0;
 	u16 phy_ctl = 0;
 	struct ieee80211_rate *tx_rate;

 	wlhdr = (const struct ieee80211_hdr *)fragment_data;

 	memset(txhdr, 0, sizeof(*txhdr));

 	tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);

 	rate = tx_rate->hw_value;
 	rate_ofdm = b43legacy_is_ofdm_rate(rate);
 	rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : tx_rate;
 	rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);

 	txhdr->mac_frame_ctl = wlhdr->frame_control;
 	memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);

 	/* Calculate duration for fallback rate */
 	if ((rate_fb->hw_value == rate) ||
 	    (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
 	    (wlhdr->duration_id == cpu_to_le16(0))) {
 		/* If the fallback rate equals the normal rate or the
 		 * dur_id field contains an AID, CFP magic or 0,
 		 * use the original dur_id field. */
 		txhdr->dur_fb = wlhdr->duration_id;
 	} else {
 		txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
 							 info->control.vif,
 							 fragment_len,
 							 rate_fb);
 	}

 	plcp_fragment_len = fragment_len + FCS_LEN;
 	if (use_encryption) {
 		u8 key_idx = info->control.hw_key->hw_key_idx;
 		struct b43legacy_key *key;
 		int wlhdr_len;
 		size_t iv_len;

 		B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
 		key = &(dev->key[key_idx]);

 		if (key->enabled) {
 			/* Hardware appends ICV. */
 			plcp_fragment_len += info->control.icv_len;

 			key_idx = b43legacy_kidx_to_fw(dev, key_idx);
 			mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
 				   B43legacy_TX4_MAC_KEYIDX;
 			mac_ctl |= (key->algorithm <<
 				   B43legacy_TX4_MAC_KEYALG_SHIFT) &
 				   B43legacy_TX4_MAC_KEYALG;
 			wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
 			iv_len = min((size_t)info->control.iv_len,
 				     ARRAY_SIZE(txhdr->iv));
 			memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
 		} else {
 			/* This key is invalid. This might only happen
 			 * in a short timeframe after machine resume before
 			 * we were able to reconfigure keys.
 			 * Drop this packet completely. Do not transmit it
 			 * unencrypted to avoid leaking information. */
 			return -ENOKEY;
 		}
 	}
 	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 				    (&txhdr->plcp), plcp_fragment_len,
 				    rate);
 	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 				    (&txhdr->plcp_fb), plcp_fragment_len,
 				    rate_fb->hw_value);

 	/* PHY TX Control word */
 	if (rate_ofdm)
 		phy_ctl |= B43legacy_TX4_PHY_OFDM;
 	if (dev->short_preamble)
 		phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
 	switch (info->antenna_sel_tx) {
 	case 0:
 		phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
 		break;
 	case 1:
 		phy_ctl |= B43legacy_TX4_PHY_ANT0;
 		break;
 	case 2:
 		phy_ctl |= B43legacy_TX4_PHY_ANT1;
 		break;
 	default:
 		B43legacy_BUG_ON(1);
 	}

 	/* MAC control */
 	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 		mac_ctl |= B43legacy_TX4_MAC_ACK;
 	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 		mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
 	if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 		mac_ctl |= B43legacy_TX4_MAC_STMSDU;
 	if (rate_fb_ofdm)
 		mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
 	if (info->flags & IEEE80211_TX_CTL_LONG_RETRY_LIMIT)
 		mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;

 	/* Generate the RTS or CTS-to-self frame */
 	if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) ||
 	    (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) {
 		unsigned int len;
 		struct ieee80211_hdr *hdr;
 		int rts_rate;
 		int rts_rate_fb;
 		int rts_rate_ofdm;
 		int rts_rate_fb_ofdm;

 		rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
 		rts_rate_ofdm = b43legacy_is_ofdm_rate(rts_rate);
 		rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
 		rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
 		if (rts_rate_fb_ofdm)
 			mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;

 		if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
 			ieee80211_ctstoself_get(dev->wl->hw,
 						info->control.vif,
 						fragment_data,
 						fragment_len, info,
 						(struct ieee80211_cts *)
 						(txhdr->rts_frame));
 			mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
 			len = sizeof(struct ieee80211_cts);
 		} else {
 			ieee80211_rts_get(dev->wl->hw,
 					  info->control.vif,
 					  fragment_data, fragment_len, info,
 					  (struct ieee80211_rts *)
 					  (txhdr->rts_frame));
 			mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
 			len = sizeof(struct ieee80211_rts);
 		}
 		len += FCS_LEN;
 		b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 					    (&txhdr->rts_plcp),
 					    len, rts_rate);
 		b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 					    (&txhdr->rts_plcp_fb),
 					    len, rts_rate_fb);
 		hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
 		txhdr->rts_dur_fb = hdr->duration_id;
 	}

 	/* Magic cookie */
 	txhdr->cookie = cpu_to_le16(cookie);

 	/* Apply the bitfields */
 	txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 	txhdr->phy_ctl = cpu_to_le16(phy_ctl);

 	return 0;
 }

 int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
 			      u8 *txhdr,
 			      const unsigned char *fragment_data,
 			      unsigned int fragment_len,
 			      const struct ieee80211_tx_info *info,
 			      u16 cookie)
 {
 	return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
 			   fragment_data, fragment_len,
 			   info, cookie);
 }

 static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
 				     u8 in_rssi, int ofdm,
 				     int adjust_2053, int adjust_2050)
 {
 	struct b43legacy_phy *phy = &dev->phy;
 	s32 tmp;

 	switch (phy->radio_ver) {
 	case 0x2050:
 		if (ofdm) {
 			tmp = in_rssi;
 			if (tmp > 127)
 				tmp -= 256;
 			tmp *= 73;
 			tmp /= 64;
 			if (adjust_2050)
 				tmp += 25;
 			else
 				tmp -= 3;
 		} else {
 			if (dev->dev->bus->sprom.boardflags_lo
 			    & B43legacy_BFL_RSSI) {
 				if (in_rssi > 63)
 					in_rssi = 63;
 				tmp = phy->nrssi_lt[in_rssi];
 				tmp = 31 - tmp;
 				tmp *= -131;
 				tmp /= 128;
 				tmp -= 57;
 			} else {
 				tmp = in_rssi;
 				tmp = 31 - tmp;
 				tmp *= -149;
 				tmp /= 128;
 				tmp -= 68;
 			}
 			if (phy->type == B43legacy_PHYTYPE_G &&
 			    adjust_2050)
 				tmp += 25;
 		}
 		break;
 	case 0x2060:
 		if (in_rssi > 127)
 			tmp = in_rssi - 256;
 		else
 			tmp = in_rssi;
 		break;
 	default:
 		tmp = in_rssi;
 		tmp -= 11;
 		tmp *= 103;
 		tmp /= 64;
 		if (adjust_2053)
 			tmp -= 109;
 		else
 			tmp -= 83;
 	}

 	return (s8)tmp;
 }

 void b43legacy_rx(struct b43legacy_wldev *dev,
 		  struct sk_buff *skb,
 		  const void *_rxhdr)
 {
 	struct ieee80211_rx_status status;
 	struct b43legacy_plcp_hdr6 *plcp;
 	struct ieee80211_hdr *wlhdr;
 	const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
 	__le16 fctl;
 	u16 phystat0;
 	u16 phystat3;
 	u16 chanstat;
 	u16 mactime;
 	u32 macstat;
 	u16 chanid;
 	u8 jssi;
 	int padding;

 	memset(&status, 0, sizeof(status));

 	/* Get metadata about the frame from the header. */
 	phystat0 = le16_to_cpu(rxhdr->phy_status0);
 	phystat3 = le16_to_cpu(rxhdr->phy_status3);
 	jssi = rxhdr->jssi;
 	macstat = le16_to_cpu(rxhdr->mac_status);
 	mactime = le16_to_cpu(rxhdr->mac_time);
 	chanstat = le16_to_cpu(rxhdr->channel);

 	if (macstat & B43legacy_RX_MAC_FCSERR)
 		dev->wl->ieee_stats.dot11FCSErrorCount++;

 	/* Skip PLCP and padding */
 	padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
 	if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
 	    padding))) {
 		b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
 		goto drop;
 	}
 	plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
 	skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
 	/* The skb contains the Wireless Header + payload data now */
 	if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
 		b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
 		goto drop;
 	}
 	wlhdr = (struct ieee80211_hdr *)(skb->data);
 	fctl = wlhdr->frame_control;

 	if ((macstat & B43legacy_RX_MAC_DEC) &&
 	    !(macstat & B43legacy_RX_MAC_DECERR)) {
 		unsigned int keyidx;
 		int wlhdr_len;
 		int iv_len;
 		int icv_len;

 		keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
 			  >> B43legacy_RX_MAC_KEYIDX_SHIFT);
 		/* We must adjust the key index here. We want the "physical"
 		 * key index, but the ucode passed it slightly different.
 		 */
 		keyidx = b43legacy_kidx_to_raw(dev, keyidx);
 		B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);

 		if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
 			/* Remove PROTECTED flag to mark it as decrypted. */
 			B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
 			fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 			wlhdr->frame_control = fctl;

 			wlhdr_len = ieee80211_hdrlen(fctl);
 			if (unlikely(skb->len < (wlhdr_len + 3))) {
 				b43legacydbg(dev->wl, "RX: Packet size"
 					     " underrun3\n");
 				goto drop;
 			}
 			if (skb->data[wlhdr_len + 3] & (1 << 5)) {
 				/* The Ext-IV Bit is set in the "KeyID"
 				 * octet of the IV.
 				 */
 				iv_len = 8;
 				icv_len = 8;
 			} else {
 				iv_len = 4;
 				icv_len = 4;
 			}
 			if (unlikely(skb->len < (wlhdr_len + iv_len +
 			    icv_len))) {
 				b43legacydbg(dev->wl, "RX: Packet size"
 					     " underrun4\n");
 				goto drop;
 			}
 			/* Remove the IV */
 			memmove(skb->data + iv_len, skb->data, wlhdr_len);
 			skb_pull(skb, iv_len);
 			/* Remove the ICV */
 			skb_trim(skb, skb->len - icv_len);

 			status.flag |= RX_FLAG_DECRYPTED;
 		}
 	}

 	status.signal = b43legacy_rssi_postprocess(dev, jssi,
 				      (phystat0 & B43legacy_RX_PHYST0_OFDM),
 				      (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
 				      (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
 	status.noise = dev->stats.link_noise;
 	status.qual = (jssi * 100) / B43legacy_RX_MAX_SSI;
 	/* change to support A PHY */
 	if (phystat0 & B43legacy_RX_PHYST0_OFDM)
 		status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
 	else
 		status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
 	status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);

 	/*
 	 * All frames on monitor interfaces and beacons always need a full
 	 * 64-bit timestamp. Monitor interfaces need it for diagnostic
 	 * purposes and beacons for IBSS merging.
 	 * This code assumes we get to process the packet within 16 bits
 	 * of timestamp, i.e. about 65 milliseconds after the PHY received
 	 * the first symbol.
 	 */
 	if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
 		u16 low_mactime_now;

 		b43legacy_tsf_read(dev, &status.mactime);
 		low_mactime_now = status.mactime;
 		status.mactime = status.mactime & ~0xFFFFULL;
 		status.mactime += mactime;
 		if (low_mactime_now <= mactime)
 			status.mactime -= 0x10000;
 		status.flag |= RX_FLAG_TSFT;
 	}

 	chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
 		  B43legacy_RX_CHAN_ID_SHIFT;
 	switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
 	case B43legacy_PHYTYPE_B:
 	case B43legacy_PHYTYPE_G:
 		status.band = IEEE80211_BAND_2GHZ;
 		status.freq = chanid + 2400;
 		break;
 	default:
 		b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
 		       chanstat);
 	}

 	dev->stats.last_rx = jiffies;
 	ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);

 	return;
 drop:
 	b43legacydbg(dev->wl, "RX: Packet dropped\n");
 	dev_kfree_skb_any(skb);
 }

 void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
 			     const struct b43legacy_txstatus *status)
 {
 	b43legacy_debugfs_log_txstat(dev, status);

 	if (status->intermediate)
 		return;
 	if (status->for_ampdu)
 		return;
 	if (!status->acked)
 		dev->wl->ieee_stats.dot11ACKFailureCount++;
 	if (status->rts_count) {
 		if (status->rts_count == 0xF) /* FIXME */
 			dev->wl->ieee_stats.dot11RTSFailureCount++;
 		else
 			dev->wl->ieee_stats.dot11RTSSuccessCount++;
 	}

 	if (b43legacy_using_pio(dev))
 		b43legacy_pio_handle_txstatus(dev, status);
 	else
 		b43legacy_dma_handle_txstatus(dev, status);
 }

 /* Handle TX status report as received through DMA/PIO queues */
 void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
 				 const struct b43legacy_hwtxstatus *hw)
 {
 	struct b43legacy_txstatus status;
 	u8 tmp;

 	status.cookie = le16_to_cpu(hw->cookie);
 	status.seq = le16_to_cpu(hw->seq);
 	status.phy_stat = hw->phy_stat;
 	tmp = hw->count;
 	status.frame_count = (tmp >> 4);
 	status.rts_count = (tmp & 0x0F);
 	tmp = hw->flags << 1;
 	status.supp_reason = ((tmp & 0x1C) >> 2);
 	status.pm_indicated = !!(tmp & 0x80);
 	status.intermediate = !!(tmp & 0x40);
 	status.for_ampdu = !!(tmp & 0x20);
 	status.acked = !!(tmp & 0x02);

 	b43legacy_handle_txstatus(dev, &status);
 }

 /* Stop any TX operation on the device (suspend the hardware queues) */
 void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
 {
 	if (b43legacy_using_pio(dev))
 		b43legacy_pio_freeze_txqueues(dev);
 	else
 		b43legacy_dma_tx_suspend(dev);
 }

 /* Resume any TX operation on the device (resume the hardware queues) */
 void b43legacy_tx_resume(struct b43legacy_wldev *dev)
 {
 	if (b43legacy_using_pio(dev))
 		b43legacy_pio_thaw_txqueues(dev);
 	else
 		b43legacy_dma_tx_resume(dev);
 }

 /* Initialize the QoS parameters */
 void b43legacy_qos_init(struct b43legacy_wldev *dev)
 {
 	/* FIXME: This function must probably be called from the mac80211
 	 * config callback. */
 return;

 	b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
 	/* FIXME kill magic */
 	b43legacy_write16(dev, 0x688,
 			  b43legacy_read16(dev, 0x688) | 0x4);


 	/*TODO: We might need some stack support here to get the values. */
 }
	/*

	Broadcom B43legacy wireless driver

	Transmission (TX/RX) related functions.

	Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
	Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
	Copyright (C) 2005, 2006 Michael Buesch <mb@bu3sch.de>
	Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
	Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
	Copyright (C) 2007 Larry Finger <Larry.Finger@lwfinger.net>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	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.

	You should have received a copy of the GNU General Public License
	along with this program; see the file COPYING. If not, write to
	the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
	Boston, MA 02110-1301, USA.

	*/

	#include <net/dst.h>

	#include "xmit.h"
	#include "phy.h"
	#include "dma.h"
	#include "pio.h"


	/* Extract the bitrate out of a CCK PLCP header. */
	static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
	{
	switch (plcp->raw[0]) {
	case 0x0A:
	return 0;
	case 0x14:
	return 1;
	case 0x37:
	return 2;
	case 0x6E:
	return 3;
	}
	B43legacy_BUG_ON(1);
	return -1;
	}

	/* Extract the bitrate out of an OFDM PLCP header. */
	static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
	bool aphy)
	{
	int base = aphy ? 0 : 4;

	switch (plcp->raw[0] & 0xF) {
	case 0xB:
	return base + 0;
	case 0xF:
	return base + 1;
	case 0xA:
	return base + 2;
	case 0xE:
	return base + 3;
	case 0x9:
	return base + 4;
	case 0xD:
	return base + 5;
	case 0x8:
	return base + 6;
	case 0xC:
	return base + 7;
	}
	B43legacy_BUG_ON(1);
	return -1;
	}

	u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
	{
	switch (bitrate) {
	case B43legacy_CCK_RATE_1MB:
	return 0x0A;
	case B43legacy_CCK_RATE_2MB:
	return 0x14;
	case B43legacy_CCK_RATE_5MB:
	return 0x37;
	case B43legacy_CCK_RATE_11MB:
	return 0x6E;
	}
	B43legacy_BUG_ON(1);
	return 0;
	}

	u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
	{
	switch (bitrate) {
	case B43legacy_OFDM_RATE_6MB:
	return 0xB;
	case B43legacy_OFDM_RATE_9MB:
	return 0xF;
	case B43legacy_OFDM_RATE_12MB:
	return 0xA;
	case B43legacy_OFDM_RATE_18MB:
	return 0xE;
	case B43legacy_OFDM_RATE_24MB:
	return 0x9;
	case B43legacy_OFDM_RATE_36MB:
	return 0xD;
	case B43legacy_OFDM_RATE_48MB:
	return 0x8;
	case B43legacy_OFDM_RATE_54MB:
	return 0xC;
	}
	B43legacy_BUG_ON(1);
	return 0;
	}

	void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
	const u16 octets, const u8 bitrate)
	{
	__le32 *data = &(plcp->data);
	__u8 *raw = plcp->raw;

	if (b43legacy_is_ofdm_rate(bitrate)) {
	u16 d;

	d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
	B43legacy_WARN_ON(octets & 0xF000);
	d \|= (octets << 5);
	*data = cpu_to_le32(d);
	} else {
	u32 plen;

	plen = octets * 16 / bitrate;
	if ((octets * 16 % bitrate) > 0) {
	plen++;
	if ((bitrate == B43legacy_CCK_RATE_11MB)
	&& ((octets * 8 % 11) < 4))
	raw[1] = 0x84;
	else
	raw[1] = 0x04;
	} else
	raw[1] = 0x04;
	*data \|= cpu_to_le32(plen << 16);
	raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
	}
	}

	static u8 b43legacy_calc_fallback_rate(u8 bitrate)
	{
	switch (bitrate) {
	case B43legacy_CCK_RATE_1MB:
	return B43legacy_CCK_RATE_1MB;
	case B43legacy_CCK_RATE_2MB:
	return B43legacy_CCK_RATE_1MB;
	case B43legacy_CCK_RATE_5MB:
	return B43legacy_CCK_RATE_2MB;
	case B43legacy_CCK_RATE_11MB:
	return B43legacy_CCK_RATE_5MB;
	case B43legacy_OFDM_RATE_6MB:
	return B43legacy_CCK_RATE_5MB;
	case B43legacy_OFDM_RATE_9MB:
	return B43legacy_OFDM_RATE_6MB;
	case B43legacy_OFDM_RATE_12MB:
	return B43legacy_OFDM_RATE_9MB;
	case B43legacy_OFDM_RATE_18MB:
	return B43legacy_OFDM_RATE_12MB;
	case B43legacy_OFDM_RATE_24MB:
	return B43legacy_OFDM_RATE_18MB;
	case B43legacy_OFDM_RATE_36MB:
	return B43legacy_OFDM_RATE_24MB;
	case B43legacy_OFDM_RATE_48MB:
	return B43legacy_OFDM_RATE_36MB;
	case B43legacy_OFDM_RATE_54MB:
	return B43legacy_OFDM_RATE_48MB;
	}
	B43legacy_BUG_ON(1);
	return 0;
	}

	static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
	struct b43legacy_txhdr_fw3 *txhdr,
	const unsigned char *fragment_data,
	unsigned int fragment_len,
	const struct ieee80211_tx_info *info,
	u16 cookie)
	{
	const struct ieee80211_hdr *wlhdr;
	int use_encryption = !!info->control.hw_key;
	u8 rate;
	struct ieee80211_rate *rate_fb;
	int rate_ofdm;
	int rate_fb_ofdm;
	unsigned int plcp_fragment_len;
	u32 mac_ctl = 0;
	u16 phy_ctl = 0;
	struct ieee80211_rate *tx_rate;

	wlhdr = (const struct ieee80211_hdr *)fragment_data;

	memset(txhdr, 0, sizeof(*txhdr));

	tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);

	rate = tx_rate->hw_value;
	rate_ofdm = b43legacy_is_ofdm_rate(rate);
	rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : tx_rate;
	rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);

	txhdr->mac_frame_ctl = wlhdr->frame_control;
	memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);

	/* Calculate duration for fallback rate */
	if ((rate_fb->hw_value == rate) \|\|
	(wlhdr->duration_id & cpu_to_le16(0x8000)) \|\|
	(wlhdr->duration_id == cpu_to_le16(0))) {
	/* If the fallback rate equals the normal rate or the
	* dur_id field contains an AID, CFP magic or 0,
	* use the original dur_id field. */
	txhdr->dur_fb = wlhdr->duration_id;
	} else {
	txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
	info->control.vif,
	fragment_len,
	rate_fb);
	}

	plcp_fragment_len = fragment_len + FCS_LEN;
	if (use_encryption) {
	u8 key_idx = info->control.hw_key->hw_key_idx;
	struct b43legacy_key *key;
	int wlhdr_len;
	size_t iv_len;

	B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
	key = &(dev->key[key_idx]);

	if (key->enabled) {
	/* Hardware appends ICV. */
	plcp_fragment_len += info->control.icv_len;

	key_idx = b43legacy_kidx_to_fw(dev, key_idx);
	mac_ctl \|= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
	B43legacy_TX4_MAC_KEYIDX;
	mac_ctl \|= (key->algorithm <<
	B43legacy_TX4_MAC_KEYALG_SHIFT) &
	B43legacy_TX4_MAC_KEYALG;
	wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
	iv_len = min((size_t)info->control.iv_len,
	ARRAY_SIZE(txhdr->iv));
	memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
	} else {
	/* This key is invalid. This might only happen
	* in a short timeframe after machine resume before
	* we were able to reconfigure keys.
	* Drop this packet completely. Do not transmit it
	* unencrypted to avoid leaking information. */
	return -ENOKEY;
	}
	}
	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
	(&txhdr->plcp), plcp_fragment_len,
	rate);
	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
	(&txhdr->plcp_fb), plcp_fragment_len,
	rate_fb->hw_value);

	/* PHY TX Control word */
	if (rate_ofdm)
	phy_ctl \|= B43legacy_TX4_PHY_OFDM;
	if (dev->short_preamble)
	phy_ctl \|= B43legacy_TX4_PHY_SHORTPRMBL;
	switch (info->antenna_sel_tx) {
	case 0:
	phy_ctl \|= B43legacy_TX4_PHY_ANTLAST;
	break;
	case 1:
	phy_ctl \|= B43legacy_TX4_PHY_ANT0;
	break;
	case 2:
	phy_ctl \|= B43legacy_TX4_PHY_ANT1;
	break;
	default:
	B43legacy_BUG_ON(1);
	}

	/* MAC control */
	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
	mac_ctl \|= B43legacy_TX4_MAC_ACK;
	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
	mac_ctl \|= B43legacy_TX4_MAC_HWSEQ;
	if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
	mac_ctl \|= B43legacy_TX4_MAC_STMSDU;
	if (rate_fb_ofdm)
	mac_ctl \|= B43legacy_TX4_MAC_FALLBACKOFDM;
	if (info->flags & IEEE80211_TX_CTL_LONG_RETRY_LIMIT)
	mac_ctl \|= B43legacy_TX4_MAC_LONGFRAME;

	/* Generate the RTS or CTS-to-self frame */
	if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) \|\|
	(info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) {
	unsigned int len;
	struct ieee80211_hdr *hdr;
	int rts_rate;
	int rts_rate_fb;
	int rts_rate_ofdm;
	int rts_rate_fb_ofdm;

	rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
	rts_rate_ofdm = b43legacy_is_ofdm_rate(rts_rate);
	rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
	rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
	if (rts_rate_fb_ofdm)
	mac_ctl \|= B43legacy_TX4_MAC_CTSFALLBACKOFDM;

	if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
	ieee80211_ctstoself_get(dev->wl->hw,
	info->control.vif,
	fragment_data,
	fragment_len, info,
	(struct ieee80211_cts *)
	(txhdr->rts_frame));
	mac_ctl \|= B43legacy_TX4_MAC_SENDCTS;
	len = sizeof(struct ieee80211_cts);
	} else {
	ieee80211_rts_get(dev->wl->hw,
	info->control.vif,
	fragment_data, fragment_len, info,
	(struct ieee80211_rts *)
	(txhdr->rts_frame));
	mac_ctl \|= B43legacy_TX4_MAC_SENDRTS;
	len = sizeof(struct ieee80211_rts);
	}
	len += FCS_LEN;
	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
	(&txhdr->rts_plcp),
	len, rts_rate);
	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
	(&txhdr->rts_plcp_fb),
	len, rts_rate_fb);
	hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
	txhdr->rts_dur_fb = hdr->duration_id;
	}

	/* Magic cookie */
	txhdr->cookie = cpu_to_le16(cookie);

	/* Apply the bitfields */
	txhdr->mac_ctl = cpu_to_le32(mac_ctl);
	txhdr->phy_ctl = cpu_to_le16(phy_ctl);

	return 0;
	}

	int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
	u8 *txhdr,
	const unsigned char *fragment_data,
	unsigned int fragment_len,
	const struct ieee80211_tx_info *info,
	u16 cookie)
	{
	return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
	fragment_data, fragment_len,
	info, cookie);
	}

	static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
	u8 in_rssi, int ofdm,
	int adjust_2053, int adjust_2050)
	{
	struct b43legacy_phy *phy = &dev->phy;
	s32 tmp;

	switch (phy->radio_ver) {
	case 0x2050:
	if (ofdm) {
	tmp = in_rssi;
	if (tmp > 127)
	tmp -= 256;
	tmp *= 73;
	tmp /= 64;
	if (adjust_2050)
	tmp += 25;
	else
	tmp -= 3;
	} else {
	if (dev->dev->bus->sprom.boardflags_lo
	& B43legacy_BFL_RSSI) {
	if (in_rssi > 63)
	in_rssi = 63;
	tmp = phy->nrssi_lt[in_rssi];
	tmp = 31 - tmp;
	tmp *= -131;
	tmp /= 128;
	tmp -= 57;
	} else {
	tmp = in_rssi;
	tmp = 31 - tmp;
	tmp *= -149;
	tmp /= 128;
	tmp -= 68;
	}
	if (phy->type == B43legacy_PHYTYPE_G &&
	adjust_2050)
	tmp += 25;
	}
	break;
	case 0x2060:
	if (in_rssi > 127)
	tmp = in_rssi - 256;
	else
	tmp = in_rssi;
	break;
	default:
	tmp = in_rssi;
	tmp -= 11;
	tmp *= 103;
	tmp /= 64;
	if (adjust_2053)
	tmp -= 109;
	else
	tmp -= 83;
	}

	return (s8)tmp;
	}

	void b43legacy_rx(struct b43legacy_wldev *dev,
	struct sk_buff *skb,
	const void *_rxhdr)
	{
	struct ieee80211_rx_status status;
	struct b43legacy_plcp_hdr6 *plcp;
	struct ieee80211_hdr *wlhdr;
	const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
	__le16 fctl;
	u16 phystat0;
	u16 phystat3;
	u16 chanstat;
	u16 mactime;
	u32 macstat;
	u16 chanid;
	u8 jssi;
	int padding;

	memset(&status, 0, sizeof(status));

	/* Get metadata about the frame from the header. */
	phystat0 = le16_to_cpu(rxhdr->phy_status0);
	phystat3 = le16_to_cpu(rxhdr->phy_status3);
	jssi = rxhdr->jssi;
	macstat = le16_to_cpu(rxhdr->mac_status);
	mactime = le16_to_cpu(rxhdr->mac_time);
	chanstat = le16_to_cpu(rxhdr->channel);

	if (macstat & B43legacy_RX_MAC_FCSERR)
	dev->wl->ieee_stats.dot11FCSErrorCount++;

	/* Skip PLCP and padding */
	padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
	if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
	padding))) {
	b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
	goto drop;
	}
	plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
	skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
	/* The skb contains the Wireless Header + payload data now */
	if (unlikely(skb->len < (2+2+6/minimum hdr/ + FCS_LEN))) {
	b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
	goto drop;
	}
	wlhdr = (struct ieee80211_hdr *)(skb->data);
	fctl = wlhdr->frame_control;

	if ((macstat & B43legacy_RX_MAC_DEC) &&
	!(macstat & B43legacy_RX_MAC_DECERR)) {
	unsigned int keyidx;
	int wlhdr_len;
	int iv_len;
	int icv_len;

	keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
	>> B43legacy_RX_MAC_KEYIDX_SHIFT);
	/* We must adjust the key index here. We want the "physical"
	* key index, but the ucode passed it slightly different.
	*/
	keyidx = b43legacy_kidx_to_raw(dev, keyidx);
	B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);

	if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
	/* Remove PROTECTED flag to mark it as decrypted. */
	B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
	fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
	wlhdr->frame_control = fctl;

	wlhdr_len = ieee80211_hdrlen(fctl);
	if (unlikely(skb->len < (wlhdr_len + 3))) {
	b43legacydbg(dev->wl, "RX: Packet size"
	" underrun3\n");
	goto drop;
	}
	if (skb->data[wlhdr_len + 3] & (1 << 5)) {
	/* The Ext-IV Bit is set in the "KeyID"
	* octet of the IV.
	*/
	iv_len = 8;
	icv_len = 8;
	} else {
	iv_len = 4;
	icv_len = 4;
	}
	if (unlikely(skb->len < (wlhdr_len + iv_len +
	icv_len))) {
	b43legacydbg(dev->wl, "RX: Packet size"
	" underrun4\n");
	goto drop;
	}
	/* Remove the IV */
	memmove(skb->data + iv_len, skb->data, wlhdr_len);
	skb_pull(skb, iv_len);
	/* Remove the ICV */
	skb_trim(skb, skb->len - icv_len);

	status.flag \|= RX_FLAG_DECRYPTED;
	}
	}

	status.signal = b43legacy_rssi_postprocess(dev, jssi,
	(phystat0 & B43legacy_RX_PHYST0_OFDM),
	(phystat0 & B43legacy_RX_PHYST0_GAINCTL),
	(phystat3 & B43legacy_RX_PHYST3_TRSTATE));
	status.noise = dev->stats.link_noise;
	status.qual = (jssi * 100) / B43legacy_RX_MAX_SSI;
	/* change to support A PHY */
	if (phystat0 & B43legacy_RX_PHYST0_OFDM)
	status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
	else
	status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
	status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);

	/*
	* All frames on monitor interfaces and beacons always need a full
	* 64-bit timestamp. Monitor interfaces need it for diagnostic
	* purposes and beacons for IBSS merging.
	* This code assumes we get to process the packet within 16 bits
	* of timestamp, i.e. about 65 milliseconds after the PHY received
	* the first symbol.
	*/
	if (ieee80211_is_beacon(fctl) \|\| dev->wl->radiotap_enabled) {
	u16 low_mactime_now;

	b43legacy_tsf_read(dev, &status.mactime);
	low_mactime_now = status.mactime;
	status.mactime = status.mactime & ~0xFFFFULL;
	status.mactime += mactime;
	if (low_mactime_now <= mactime)
	status.mactime -= 0x10000;
	status.flag \|= RX_FLAG_TSFT;
	}

	chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
	B43legacy_RX_CHAN_ID_SHIFT;
	switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
	case B43legacy_PHYTYPE_B:
	case B43legacy_PHYTYPE_G:
	status.band = IEEE80211_BAND_2GHZ;
	status.freq = chanid + 2400;
	break;
	default:
	b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
	chanstat);
	}

	dev->stats.last_rx = jiffies;
	ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);

	return;
	drop:
	b43legacydbg(dev->wl, "RX: Packet dropped\n");
	dev_kfree_skb_any(skb);
	}

	void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
	const struct b43legacy_txstatus *status)
	{
	b43legacy_debugfs_log_txstat(dev, status);

	if (status->intermediate)
	return;
	if (status->for_ampdu)
	return;
	if (!status->acked)
	dev->wl->ieee_stats.dot11ACKFailureCount++;
	if (status->rts_count) {
	if (status->rts_count == 0xF) /* FIXME */
	dev->wl->ieee_stats.dot11RTSFailureCount++;
	else
	dev->wl->ieee_stats.dot11RTSSuccessCount++;
	}

	if (b43legacy_using_pio(dev))
	b43legacy_pio_handle_txstatus(dev, status);
	else
	b43legacy_dma_handle_txstatus(dev, status);
	}

	/* Handle TX status report as received through DMA/PIO queues */
	void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
	const struct b43legacy_hwtxstatus *hw)
	{
	struct b43legacy_txstatus status;
	u8 tmp;

	status.cookie = le16_to_cpu(hw->cookie);
	status.seq = le16_to_cpu(hw->seq);
	status.phy_stat = hw->phy_stat;
	tmp = hw->count;
	status.frame_count = (tmp >> 4);
	status.rts_count = (tmp & 0x0F);
	tmp = hw->flags << 1;
	status.supp_reason = ((tmp & 0x1C) >> 2);
	status.pm_indicated = !!(tmp & 0x80);
	status.intermediate = !!(tmp & 0x40);
	status.for_ampdu = !!(tmp & 0x20);
	status.acked = !!(tmp & 0x02);

	b43legacy_handle_txstatus(dev, &status);
	}

	/* Stop any TX operation on the device (suspend the hardware queues) */
	void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
	{
	if (b43legacy_using_pio(dev))
	b43legacy_pio_freeze_txqueues(dev);
	else
	b43legacy_dma_tx_suspend(dev);
	}

	/* Resume any TX operation on the device (resume the hardware queues) */
	void b43legacy_tx_resume(struct b43legacy_wldev *dev)
	{
	if (b43legacy_using_pio(dev))
	b43legacy_pio_thaw_txqueues(dev);
	else
	b43legacy_dma_tx_resume(dev);
	}

	/* Initialize the QoS parameters */
	void b43legacy_qos_init(struct b43legacy_wldev *dev)
	{
	/* FIXME: This function must probably be called from the mac80211
	* config callback. */
	return;

	b43legacy_hf_write(dev, b43legacy_hf_read(dev) \| B43legacy_HF_EDCF);
	/* FIXME kill magic */
	b43legacy_write16(dev, 0x688,
	b43legacy_read16(dev, 0x688) \| 0x4);


	/TODO: We might need some stack support here to get the values. /
	}