1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 
4   Broadcom B43legacy wireless driver
5 
6   Transmission (TX/RX) related functions.
7 
8   Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
9   Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
10   Copyright (C) 2005, 2006 Michael Buesch <m@bues.ch>
11   Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
12   Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
13   Copyright (C) 2007 Larry Finger <Larry.Finger@lwfinger.net>
14 
15 
16 */
17 
18 #include <net/dst.h>
19 
20 #include "xmit.h"
21 #include "phy.h"
22 #include "dma.h"
23 #include "pio.h"
24 
25 
26 /* Extract the bitrate out of a CCK PLCP header. */
27 static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
28 {
29 	switch (plcp->raw[0]) {
30 	case 0x0A:
31 		return 0;
32 	case 0x14:
33 		return 1;
34 	case 0x37:
35 		return 2;
36 	case 0x6E:
37 		return 3;
38 	}
39 	B43legacy_BUG_ON(1);
40 	return -1;
41 }
42 
43 /* Extract the bitrate out of an OFDM PLCP header. */
44 static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
45 					      bool aphy)
46 {
47 	int base = aphy ? 0 : 4;
48 
49 	switch (plcp->raw[0] & 0xF) {
50 	case 0xB:
51 		return base + 0;
52 	case 0xF:
53 		return base + 1;
54 	case 0xA:
55 		return base + 2;
56 	case 0xE:
57 		return base + 3;
58 	case 0x9:
59 		return base + 4;
60 	case 0xD:
61 		return base + 5;
62 	case 0x8:
63 		return base + 6;
64 	case 0xC:
65 		return base + 7;
66 	}
67 	B43legacy_BUG_ON(1);
68 	return -1;
69 }
70 
71 u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
72 {
73 	switch (bitrate) {
74 	case B43legacy_CCK_RATE_1MB:
75 		return 0x0A;
76 	case B43legacy_CCK_RATE_2MB:
77 		return 0x14;
78 	case B43legacy_CCK_RATE_5MB:
79 		return 0x37;
80 	case B43legacy_CCK_RATE_11MB:
81 		return 0x6E;
82 	}
83 	B43legacy_BUG_ON(1);
84 	return 0;
85 }
86 
87 u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
88 {
89 	switch (bitrate) {
90 	case B43legacy_OFDM_RATE_6MB:
91 		return 0xB;
92 	case B43legacy_OFDM_RATE_9MB:
93 		return 0xF;
94 	case B43legacy_OFDM_RATE_12MB:
95 		return 0xA;
96 	case B43legacy_OFDM_RATE_18MB:
97 		return 0xE;
98 	case B43legacy_OFDM_RATE_24MB:
99 		return 0x9;
100 	case B43legacy_OFDM_RATE_36MB:
101 		return 0xD;
102 	case B43legacy_OFDM_RATE_48MB:
103 		return 0x8;
104 	case B43legacy_OFDM_RATE_54MB:
105 		return 0xC;
106 	}
107 	B43legacy_BUG_ON(1);
108 	return 0;
109 }
110 
111 void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
112 				 const u16 octets, const u8 bitrate)
113 {
114 	__le32 *data = &(plcp->data);
115 	__u8 *raw = plcp->raw;
116 
117 	if (b43legacy_is_ofdm_rate(bitrate)) {
118 		u16 d;
119 
120 		d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
121 		B43legacy_WARN_ON(octets & 0xF000);
122 		d |= (octets << 5);
123 		*data = cpu_to_le32(d);
124 	} else {
125 		u32 plen;
126 
127 		plen = octets * 16 / bitrate;
128 		if ((octets * 16 % bitrate) > 0) {
129 			plen++;
130 			if ((bitrate == B43legacy_CCK_RATE_11MB)
131 			    && ((octets * 8 % 11) < 4))
132 				raw[1] = 0x84;
133 			else
134 				raw[1] = 0x04;
135 		} else
136 			raw[1] = 0x04;
137 		*data |= cpu_to_le32(plen << 16);
138 		raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
139 	}
140 }
141 
142 static u8 b43legacy_calc_fallback_rate(u8 bitrate)
143 {
144 	switch (bitrate) {
145 	case B43legacy_CCK_RATE_1MB:
146 		return B43legacy_CCK_RATE_1MB;
147 	case B43legacy_CCK_RATE_2MB:
148 		return B43legacy_CCK_RATE_1MB;
149 	case B43legacy_CCK_RATE_5MB:
150 		return B43legacy_CCK_RATE_2MB;
151 	case B43legacy_CCK_RATE_11MB:
152 		return B43legacy_CCK_RATE_5MB;
153 	case B43legacy_OFDM_RATE_6MB:
154 		return B43legacy_CCK_RATE_5MB;
155 	case B43legacy_OFDM_RATE_9MB:
156 		return B43legacy_OFDM_RATE_6MB;
157 	case B43legacy_OFDM_RATE_12MB:
158 		return B43legacy_OFDM_RATE_9MB;
159 	case B43legacy_OFDM_RATE_18MB:
160 		return B43legacy_OFDM_RATE_12MB;
161 	case B43legacy_OFDM_RATE_24MB:
162 		return B43legacy_OFDM_RATE_18MB;
163 	case B43legacy_OFDM_RATE_36MB:
164 		return B43legacy_OFDM_RATE_24MB;
165 	case B43legacy_OFDM_RATE_48MB:
166 		return B43legacy_OFDM_RATE_36MB;
167 	case B43legacy_OFDM_RATE_54MB:
168 		return B43legacy_OFDM_RATE_48MB;
169 	}
170 	B43legacy_BUG_ON(1);
171 	return 0;
172 }
173 
174 static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
175 			       struct b43legacy_txhdr_fw3 *txhdr,
176 			       const unsigned char *fragment_data,
177 			       unsigned int fragment_len,
178 			       struct ieee80211_tx_info *info,
179 			       u16 cookie)
180 {
181 	const struct ieee80211_hdr *wlhdr;
182 	int use_encryption = !!info->control.hw_key;
183 	u8 rate;
184 	struct ieee80211_rate *rate_fb;
185 	int rate_ofdm;
186 	int rate_fb_ofdm;
187 	unsigned int plcp_fragment_len;
188 	u32 mac_ctl = 0;
189 	u16 phy_ctl = 0;
190 	struct ieee80211_rate *tx_rate;
191 	struct ieee80211_tx_rate *rates;
192 
193 	wlhdr = (const struct ieee80211_hdr *)fragment_data;
194 
195 	memset(txhdr, 0, sizeof(*txhdr));
196 
197 	tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);
198 
199 	rate = tx_rate->hw_value;
200 	rate_ofdm = b43legacy_is_ofdm_rate(rate);
201 	rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
202 	rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
203 
204 	txhdr->mac_frame_ctl = wlhdr->frame_control;
205 	memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN);
206 
207 	/* Calculate duration for fallback rate */
208 	if ((rate_fb->hw_value == rate) ||
209 	    (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
210 	    (wlhdr->duration_id == cpu_to_le16(0))) {
211 		/* If the fallback rate equals the normal rate or the
212 		 * dur_id field contains an AID, CFP magic or 0,
213 		 * use the original dur_id field. */
214 		txhdr->dur_fb = wlhdr->duration_id;
215 	} else {
216 		txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
217 							 info->control.vif,
218 							 info->band,
219 							 fragment_len,
220 							 rate_fb);
221 	}
222 
223 	plcp_fragment_len = fragment_len + FCS_LEN;
224 	if (use_encryption) {
225 		u8 key_idx = info->control.hw_key->hw_key_idx;
226 		struct b43legacy_key *key;
227 		int wlhdr_len;
228 		size_t iv_len;
229 
230 		B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
231 		key = &(dev->key[key_idx]);
232 
233 		if (key->enabled) {
234 			/* Hardware appends ICV. */
235 			plcp_fragment_len += info->control.hw_key->icv_len;
236 
237 			key_idx = b43legacy_kidx_to_fw(dev, key_idx);
238 			mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
239 				   B43legacy_TX4_MAC_KEYIDX;
240 			mac_ctl |= (key->algorithm <<
241 				   B43legacy_TX4_MAC_KEYALG_SHIFT) &
242 				   B43legacy_TX4_MAC_KEYALG;
243 			wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
244 			iv_len = min_t(size_t, info->control.hw_key->iv_len,
245 				     ARRAY_SIZE(txhdr->iv));
246 			memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
247 		} else {
248 			/* This key is invalid. This might only happen
249 			 * in a short timeframe after machine resume before
250 			 * we were able to reconfigure keys.
251 			 * Drop this packet completely. Do not transmit it
252 			 * unencrypted to avoid leaking information. */
253 			return -ENOKEY;
254 		}
255 	}
256 	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
257 				    (&txhdr->plcp), plcp_fragment_len,
258 				    rate);
259 	b43legacy_generate_plcp_hdr(&txhdr->plcp_fb, plcp_fragment_len,
260 				    rate_fb->hw_value);
261 
262 	/* PHY TX Control word */
263 	if (rate_ofdm)
264 		phy_ctl |= B43legacy_TX4_PHY_ENC_OFDM;
265 	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
266 		phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
267 	phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
268 
269 	/* MAC control */
270 	rates = info->control.rates;
271 	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
272 		mac_ctl |= B43legacy_TX4_MAC_ACK;
273 	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
274 		mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
275 	if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
276 		mac_ctl |= B43legacy_TX4_MAC_STMSDU;
277 	if (rate_fb_ofdm)
278 		mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
279 
280 	/* Overwrite rates[0].count to make the retry calculation
281 	 * in the tx status easier. need the actual retry limit to
282 	 * detect whether the fallback rate was used.
283 	 */
284 	if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
285 	    (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
286 		rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
287 		mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
288 	} else {
289 		rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
290 	}
291 
292 	/* Generate the RTS or CTS-to-self frame */
293 	if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
294 	    (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
295 		unsigned int len;
296 		struct ieee80211_hdr *hdr;
297 		int rts_rate;
298 		int rts_rate_fb;
299 		int rts_rate_fb_ofdm;
300 
301 		rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
302 		rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
303 		rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
304 		if (rts_rate_fb_ofdm)
305 			mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
306 
307 		if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
308 			ieee80211_ctstoself_get(dev->wl->hw,
309 						info->control.vif,
310 						fragment_data,
311 						fragment_len, info,
312 						(struct ieee80211_cts *)
313 						(txhdr->rts_frame));
314 			mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
315 			len = sizeof(struct ieee80211_cts);
316 		} else {
317 			ieee80211_rts_get(dev->wl->hw,
318 					  info->control.vif,
319 					  fragment_data, fragment_len, info,
320 					  (struct ieee80211_rts *)
321 					  (txhdr->rts_frame));
322 			mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
323 			len = sizeof(struct ieee80211_rts);
324 		}
325 		len += FCS_LEN;
326 		b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
327 					    (&txhdr->rts_plcp),
328 					    len, rts_rate);
329 		b43legacy_generate_plcp_hdr(&txhdr->rts_plcp_fb,
330 					    len, rts_rate_fb);
331 		hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
332 		txhdr->rts_dur_fb = hdr->duration_id;
333 	}
334 
335 	/* Magic cookie */
336 	txhdr->cookie = cpu_to_le16(cookie);
337 
338 	/* Apply the bitfields */
339 	txhdr->mac_ctl = cpu_to_le32(mac_ctl);
340 	txhdr->phy_ctl = cpu_to_le16(phy_ctl);
341 
342 	return 0;
343 }
344 
345 int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
346 			      u8 *txhdr,
347 			      const unsigned char *fragment_data,
348 			      unsigned int fragment_len,
349 			      struct ieee80211_tx_info *info,
350 			      u16 cookie)
351 {
352 	return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
353 			   fragment_data, fragment_len,
354 			   info, cookie);
355 }
356 
357 static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
358 				     u8 in_rssi, int ofdm,
359 				     int adjust_2053, int adjust_2050)
360 {
361 	struct b43legacy_phy *phy = &dev->phy;
362 	s32 tmp;
363 
364 	switch (phy->radio_ver) {
365 	case 0x2050:
366 		if (ofdm) {
367 			tmp = in_rssi;
368 			if (tmp > 127)
369 				tmp -= 256;
370 			tmp *= 73;
371 			tmp /= 64;
372 			if (adjust_2050)
373 				tmp += 25;
374 			else
375 				tmp -= 3;
376 		} else {
377 			if (dev->dev->bus->sprom.boardflags_lo
378 			    & B43legacy_BFL_RSSI) {
379 				if (in_rssi > 63)
380 					in_rssi = 63;
381 				tmp = phy->nrssi_lt[in_rssi];
382 				tmp = 31 - tmp;
383 				tmp *= -131;
384 				tmp /= 128;
385 				tmp -= 57;
386 			} else {
387 				tmp = in_rssi;
388 				tmp = 31 - tmp;
389 				tmp *= -149;
390 				tmp /= 128;
391 				tmp -= 68;
392 			}
393 			if (phy->type == B43legacy_PHYTYPE_G &&
394 			    adjust_2050)
395 				tmp += 25;
396 		}
397 		break;
398 	case 0x2060:
399 		if (in_rssi > 127)
400 			tmp = in_rssi - 256;
401 		else
402 			tmp = in_rssi;
403 		break;
404 	default:
405 		tmp = in_rssi;
406 		tmp -= 11;
407 		tmp *= 103;
408 		tmp /= 64;
409 		if (adjust_2053)
410 			tmp -= 109;
411 		else
412 			tmp -= 83;
413 	}
414 
415 	return (s8)tmp;
416 }
417 
418 void b43legacy_rx(struct b43legacy_wldev *dev,
419 		  struct sk_buff *skb,
420 		  const void *_rxhdr)
421 {
422 	struct ieee80211_rx_status status;
423 	struct b43legacy_plcp_hdr6 *plcp;
424 	struct ieee80211_hdr *wlhdr;
425 	const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
426 	__le16 fctl;
427 	u16 phystat0;
428 	u16 phystat3;
429 	u16 chanstat;
430 	u16 mactime;
431 	u32 macstat;
432 	u16 chanid;
433 	u8 jssi;
434 	int padding;
435 
436 	memset(&status, 0, sizeof(status));
437 
438 	/* Get metadata about the frame from the header. */
439 	phystat0 = le16_to_cpu(rxhdr->phy_status0);
440 	phystat3 = le16_to_cpu(rxhdr->phy_status3);
441 	jssi = rxhdr->jssi;
442 	macstat = le16_to_cpu(rxhdr->mac_status);
443 	mactime = le16_to_cpu(rxhdr->mac_time);
444 	chanstat = le16_to_cpu(rxhdr->channel);
445 
446 	if (macstat & B43legacy_RX_MAC_FCSERR)
447 		dev->wl->ieee_stats.dot11FCSErrorCount++;
448 
449 	/* Skip PLCP and padding */
450 	padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
451 	if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
452 	    padding))) {
453 		b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
454 		goto drop;
455 	}
456 	plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
457 	skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
458 	/* The skb contains the Wireless Header + payload data now */
459 	if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
460 		b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
461 		goto drop;
462 	}
463 	wlhdr = (struct ieee80211_hdr *)(skb->data);
464 	fctl = wlhdr->frame_control;
465 
466 	if ((macstat & B43legacy_RX_MAC_DEC) &&
467 	    !(macstat & B43legacy_RX_MAC_DECERR)) {
468 		unsigned int keyidx;
469 		int wlhdr_len;
470 		int iv_len;
471 		int icv_len;
472 
473 		keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
474 			  >> B43legacy_RX_MAC_KEYIDX_SHIFT);
475 		/* We must adjust the key index here. We want the "physical"
476 		 * key index, but the ucode passed it slightly different.
477 		 */
478 		keyidx = b43legacy_kidx_to_raw(dev, keyidx);
479 		B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
480 
481 		if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
482 			/* Remove PROTECTED flag to mark it as decrypted. */
483 			B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
484 			fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
485 			wlhdr->frame_control = fctl;
486 
487 			wlhdr_len = ieee80211_hdrlen(fctl);
488 			if (unlikely(skb->len < (wlhdr_len + 3))) {
489 				b43legacydbg(dev->wl, "RX: Packet size"
490 					     " underrun3\n");
491 				goto drop;
492 			}
493 			if (skb->data[wlhdr_len + 3] & (1 << 5)) {
494 				/* The Ext-IV Bit is set in the "KeyID"
495 				 * octet of the IV.
496 				 */
497 				iv_len = 8;
498 				icv_len = 8;
499 			} else {
500 				iv_len = 4;
501 				icv_len = 4;
502 			}
503 			if (unlikely(skb->len < (wlhdr_len + iv_len +
504 			    icv_len))) {
505 				b43legacydbg(dev->wl, "RX: Packet size"
506 					     " underrun4\n");
507 				goto drop;
508 			}
509 			/* Remove the IV */
510 			memmove(skb->data + iv_len, skb->data, wlhdr_len);
511 			skb_pull(skb, iv_len);
512 			/* Remove the ICV */
513 			skb_trim(skb, skb->len - icv_len);
514 
515 			status.flag |= RX_FLAG_DECRYPTED;
516 		}
517 	}
518 
519 	status.signal = b43legacy_rssi_postprocess(dev, jssi,
520 				      (phystat0 & B43legacy_RX_PHYST0_OFDM),
521 				      (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
522 				      (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
523 	/* change to support A PHY */
524 	if (phystat0 & B43legacy_RX_PHYST0_OFDM)
525 		status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
526 	else
527 		status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
528 	status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
529 
530 	/*
531 	 * All frames on monitor interfaces and beacons always need a full
532 	 * 64-bit timestamp. Monitor interfaces need it for diagnostic
533 	 * purposes and beacons for IBSS merging.
534 	 * This code assumes we get to process the packet within 16 bits
535 	 * of timestamp, i.e. about 65 milliseconds after the PHY received
536 	 * the first symbol.
537 	 */
538 	if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
539 		u16 low_mactime_now;
540 
541 		b43legacy_tsf_read(dev, &status.mactime);
542 		low_mactime_now = status.mactime;
543 		status.mactime = status.mactime & ~0xFFFFULL;
544 		status.mactime += mactime;
545 		if (low_mactime_now <= mactime)
546 			status.mactime -= 0x10000;
547 		status.flag |= RX_FLAG_MACTIME_START;
548 	}
549 
550 	chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
551 		  B43legacy_RX_CHAN_ID_SHIFT;
552 	switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
553 	case B43legacy_PHYTYPE_B:
554 	case B43legacy_PHYTYPE_G:
555 		status.band = NL80211_BAND_2GHZ;
556 		status.freq = chanid + 2400;
557 		break;
558 	default:
559 		b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
560 		       chanstat);
561 		goto drop;
562 	}
563 
564 	memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
565 	ieee80211_rx_irqsafe(dev->wl->hw, skb);
566 
567 	return;
568 drop:
569 	b43legacydbg(dev->wl, "RX: Packet dropped\n");
570 	dev_kfree_skb_any(skb);
571 }
572 
573 void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
574 			     const struct b43legacy_txstatus *status)
575 {
576 	b43legacy_debugfs_log_txstat(dev, status);
577 
578 	if (status->intermediate)
579 		return;
580 	if (status->for_ampdu)
581 		return;
582 	if (!status->acked)
583 		dev->wl->ieee_stats.dot11ACKFailureCount++;
584 	if (status->rts_count) {
585 		if (status->rts_count == 0xF) /* FIXME */
586 			dev->wl->ieee_stats.dot11RTSFailureCount++;
587 		else
588 			dev->wl->ieee_stats.dot11RTSSuccessCount++;
589 	}
590 
591 	if (b43legacy_using_pio(dev))
592 		b43legacy_pio_handle_txstatus(dev, status);
593 	else
594 		b43legacy_dma_handle_txstatus(dev, status);
595 }
596 
597 /* Handle TX status report as received through DMA/PIO queues */
598 void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
599 				 const struct b43legacy_hwtxstatus *hw)
600 {
601 	struct b43legacy_txstatus status;
602 	u8 tmp;
603 
604 	status.cookie = le16_to_cpu(hw->cookie);
605 	status.seq = le16_to_cpu(hw->seq);
606 	status.phy_stat = hw->phy_stat;
607 	tmp = hw->count;
608 	status.frame_count = (tmp >> 4);
609 	status.rts_count = (tmp & 0x0F);
610 	tmp = hw->flags << 1;
611 	status.supp_reason = ((tmp & 0x1C) >> 2);
612 	status.pm_indicated = !!(tmp & 0x80);
613 	status.intermediate = !!(tmp & 0x40);
614 	status.for_ampdu = !!(tmp & 0x20);
615 	status.acked = !!(tmp & 0x02);
616 
617 	b43legacy_handle_txstatus(dev, &status);
618 }
619 
620 /* Stop any TX operation on the device (suspend the hardware queues) */
621 void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
622 {
623 	if (b43legacy_using_pio(dev))
624 		b43legacy_pio_freeze_txqueues(dev);
625 	else
626 		b43legacy_dma_tx_suspend(dev);
627 }
628 
629 /* Resume any TX operation on the device (resume the hardware queues) */
630 void b43legacy_tx_resume(struct b43legacy_wldev *dev)
631 {
632 	if (b43legacy_using_pio(dev))
633 		b43legacy_pio_thaw_txqueues(dev);
634 	else
635 		b43legacy_dma_tx_resume(dev);
636 }
637 
638 /* Initialize the QoS parameters */
639 void b43legacy_qos_init(struct b43legacy_wldev *dev)
640 {
641 	/* FIXME: This function must probably be called from the mac80211
642 	 * config callback. */
643 return;
644 
645 	b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
646 	/* FIXME kill magic */
647 	b43legacy_write16(dev, 0x688,
648 			  b43legacy_read16(dev, 0x688) | 0x4);
649 
650 
651 	/*TODO: We might need some stack support here to get the values. */
652 }
653