xmit.c 17 KB
Newer Older
1
2
3
4
5
6
7
/*

  Broadcom B43 wireless driver

  Transmission (TX/RX) related functions.

  Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
8
  Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
  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>

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

/* Extract the bitrate out of a CCK PLCP header. */
static u8 b43_plcp_get_bitrate_cck(struct b43_plcp_hdr6 *plcp)
{
	switch (plcp->raw[0]) {
	case 0x0A:
		return B43_CCK_RATE_1MB;
	case 0x14:
		return B43_CCK_RATE_2MB;
	case 0x37:
		return B43_CCK_RATE_5MB;
	case 0x6E:
		return B43_CCK_RATE_11MB;
	}
	B43_WARN_ON(1);
	return 0;
}

/* Extract the bitrate out of an OFDM PLCP header. */
static u8 b43_plcp_get_bitrate_ofdm(struct b43_plcp_hdr6 *plcp)
{
	switch (plcp->raw[0] & 0xF) {
	case 0xB:
		return B43_OFDM_RATE_6MB;
	case 0xF:
		return B43_OFDM_RATE_9MB;
	case 0xA:
		return B43_OFDM_RATE_12MB;
	case 0xE:
		return B43_OFDM_RATE_18MB;
	case 0x9:
		return B43_OFDM_RATE_24MB;
	case 0xD:
		return B43_OFDM_RATE_36MB;
	case 0x8:
		return B43_OFDM_RATE_48MB;
	case 0xC:
		return B43_OFDM_RATE_54MB;
	}
	B43_WARN_ON(1);
	return 0;
}

u8 b43_plcp_get_ratecode_cck(const u8 bitrate)
{
	switch (bitrate) {
	case B43_CCK_RATE_1MB:
		return 0x0A;
	case B43_CCK_RATE_2MB:
		return 0x14;
	case B43_CCK_RATE_5MB:
		return 0x37;
	case B43_CCK_RATE_11MB:
		return 0x6E;
	}
	B43_WARN_ON(1);
	return 0;
}

u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)
{
	switch (bitrate) {
	case B43_OFDM_RATE_6MB:
		return 0xB;
	case B43_OFDM_RATE_9MB:
		return 0xF;
	case B43_OFDM_RATE_12MB:
		return 0xA;
	case B43_OFDM_RATE_18MB:
		return 0xE;
	case B43_OFDM_RATE_24MB:
		return 0x9;
	case B43_OFDM_RATE_36MB:
		return 0xD;
	case B43_OFDM_RATE_48MB:
		return 0x8;
	case B43_OFDM_RATE_54MB:
		return 0xC;
	}
	B43_WARN_ON(1);
	return 0;
}

void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
			   const u16 octets, const u8 bitrate)
{
	__le32 *data = &(plcp->data);
	__u8 *raw = plcp->raw;

	if (b43_is_ofdm_rate(bitrate)) {
Michael Buesch's avatar
Michael Buesch committed
124
125
126
		u32 d;

		d = b43_plcp_get_ratecode_ofdm(bitrate);
127
		B43_WARN_ON(octets & 0xF000);
Michael Buesch's avatar
Michael Buesch committed
128
129
		d |= (octets << 5);
		*data = cpu_to_le32(d);
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
	} else {
		u32 plen;

		plen = octets * 16 / bitrate;
		if ((octets * 16 % bitrate) > 0) {
			plen++;
			if ((bitrate == B43_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] = b43_plcp_get_ratecode_cck(bitrate);
	}
}

static u8 b43_calc_fallback_rate(u8 bitrate)
{
	switch (bitrate) {
	case B43_CCK_RATE_1MB:
		return B43_CCK_RATE_1MB;
	case B43_CCK_RATE_2MB:
		return B43_CCK_RATE_1MB;
	case B43_CCK_RATE_5MB:
		return B43_CCK_RATE_2MB;
	case B43_CCK_RATE_11MB:
		return B43_CCK_RATE_5MB;
	case B43_OFDM_RATE_6MB:
		return B43_CCK_RATE_5MB;
	case B43_OFDM_RATE_9MB:
		return B43_OFDM_RATE_6MB;
	case B43_OFDM_RATE_12MB:
		return B43_OFDM_RATE_9MB;
	case B43_OFDM_RATE_18MB:
		return B43_OFDM_RATE_12MB;
	case B43_OFDM_RATE_24MB:
		return B43_OFDM_RATE_18MB;
	case B43_OFDM_RATE_36MB:
		return B43_OFDM_RATE_24MB;
	case B43_OFDM_RATE_48MB:
		return B43_OFDM_RATE_36MB;
	case B43_OFDM_RATE_54MB:
		return B43_OFDM_RATE_48MB;
	}
	B43_WARN_ON(1);
	return 0;
}

static void generate_txhdr_fw4(struct b43_wldev *dev,
			       struct b43_txhdr_fw4 *txhdr,
			       const unsigned char *fragment_data,
			       unsigned int fragment_len,
			       const struct ieee80211_tx_control *txctl,
			       u16 cookie)
{
	const struct b43_phy *phy = &dev->phy;
	const struct ieee80211_hdr *wlhdr =
	    (const struct ieee80211_hdr *)fragment_data;
	int use_encryption = (!(txctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT));
	u16 fctl = le16_to_cpu(wlhdr->frame_control);
	u8 rate, rate_fb;
	int rate_ofdm, rate_fb_ofdm;
	unsigned int plcp_fragment_len;
	u32 mac_ctl = 0;
	u16 phy_ctl = 0;
	u8 extra_ft = 0;

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

	rate = txctl->tx_rate;
	rate_ofdm = b43_is_ofdm_rate(rate);
	rate_fb = (txctl->alt_retry_rate == -1) ? rate : txctl->alt_retry_rate;
	rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);

	if (rate_ofdm)
		txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate);
	else
		txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate);
	txhdr->mac_frame_ctl = wlhdr->frame_control;
	memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);

	/* Calculate duration for fallback rate */
	if ((rate_fb == 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 {
		int fbrate_base100kbps = B43_RATE_TO_BASE100KBPS(rate_fb);
		txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
								 dev->wl->if_id,
								 fragment_len,
								 fbrate_base100kbps);
	}

	plcp_fragment_len = fragment_len + FCS_LEN;
	if (use_encryption) {
		u8 key_idx = (u16) (txctl->key_idx);
		struct b43_key *key;
		int wlhdr_len;
		size_t iv_len;

		B43_WARN_ON(key_idx >= dev->max_nr_keys);
		key = &(dev->key[key_idx]);
		B43_WARN_ON(!key->keyconf);

		/* Hardware appends ICV. */
		plcp_fragment_len += txctl->icv_len;

		key_idx = b43_kidx_to_fw(dev, key_idx);
		mac_ctl |= (key_idx << B43_TX4_MAC_KEYIDX_SHIFT) &
			   B43_TX4_MAC_KEYIDX;
		mac_ctl |= (key->algorithm << B43_TX4_MAC_KEYALG_SHIFT) &
			   B43_TX4_MAC_KEYALG;
		wlhdr_len = ieee80211_get_hdrlen(fctl);
		iv_len = min((size_t) txctl->iv_len,
			     ARRAY_SIZE(txhdr->iv));
		memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
	}
	b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp),
			      plcp_fragment_len, rate);
	b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
			      plcp_fragment_len, rate_fb);

	/* Extra Frame Types */
	if (rate_fb_ofdm)
		extra_ft |= B43_TX4_EFT_FBOFDM;

	/* Set channel radio code. Note that the micrcode ORs 0x100 to
	 * this value before comparing it to the value in SHM, if this
	 * is a 5Ghz packet.
	 */
	txhdr->chan_radio_code = phy->channel;

	/* PHY TX Control word */
	if (rate_ofdm)
		phy_ctl |= B43_TX4_PHY_OFDM;
	if (dev->short_preamble)
		phy_ctl |= B43_TX4_PHY_SHORTPRMBL;
	switch (txctl->antenna_sel_tx) {
	case 0:
		phy_ctl |= B43_TX4_PHY_ANTLAST;
		break;
	case 1:
		phy_ctl |= B43_TX4_PHY_ANT0;
		break;
	case 2:
		phy_ctl |= B43_TX4_PHY_ANT1;
		break;
	default:
		B43_WARN_ON(1);
	}

	/* MAC control */
	if (!(txctl->flags & IEEE80211_TXCTL_NO_ACK))
		mac_ctl |= B43_TX4_MAC_ACK;
	if (!(((fctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
	      ((fctl & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)))
		mac_ctl |= B43_TX4_MAC_HWSEQ;
	if (txctl->flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
		mac_ctl |= B43_TX4_MAC_STMSDU;
	if (phy->type == B43_PHYTYPE_A)
		mac_ctl |= B43_TX4_MAC_5GHZ;
297
298
	if (txctl->flags & IEEE80211_TXCTL_LONG_RETRY_LIMIT)
		mac_ctl |= B43_TX4_MAC_LONGFRAME;
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387

	/* Generate the RTS or CTS-to-self frame */
	if ((txctl->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
	    (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
		unsigned int len;
		struct ieee80211_hdr *hdr;
		int rts_rate, rts_rate_fb;
		int rts_rate_ofdm, rts_rate_fb_ofdm;

		rts_rate = txctl->rts_cts_rate;
		rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);
		rts_rate_fb = b43_calc_fallback_rate(rts_rate);
		rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);

		if (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
			ieee80211_ctstoself_get(dev->wl->hw, dev->wl->if_id,
						fragment_data, fragment_len,
						txctl,
						(struct ieee80211_cts *)(txhdr->
									 rts_frame));
			mac_ctl |= B43_TX4_MAC_SENDCTS;
			len = sizeof(struct ieee80211_cts);
		} else {
			ieee80211_rts_get(dev->wl->hw, dev->wl->if_id,
					  fragment_data, fragment_len, txctl,
					  (struct ieee80211_rts *)(txhdr->
								   rts_frame));
			mac_ctl |= B43_TX4_MAC_SENDRTS;
			len = sizeof(struct ieee80211_rts);
		}
		len += FCS_LEN;
		b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->
							       rts_plcp), len,
				      rts_rate);
		b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->
							       rts_plcp_fb),
				      len, rts_rate_fb);
		hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
		txhdr->rts_dur_fb = hdr->duration_id;
		if (rts_rate_ofdm) {
			extra_ft |= B43_TX4_EFT_RTSOFDM;
			txhdr->phy_rate_rts =
			    b43_plcp_get_ratecode_ofdm(rts_rate);
		} else
			txhdr->phy_rate_rts =
			    b43_plcp_get_ratecode_cck(rts_rate);
		if (rts_rate_fb_ofdm)
			extra_ft |= B43_TX4_EFT_RTSFBOFDM;
	}

	/* 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);
	txhdr->extra_ft = extra_ft;
}

void b43_generate_txhdr(struct b43_wldev *dev,
			u8 * txhdr,
			const unsigned char *fragment_data,
			unsigned int fragment_len,
			const struct ieee80211_tx_control *txctl, u16 cookie)
{
	generate_txhdr_fw4(dev, (struct b43_txhdr_fw4 *)txhdr,
			   fragment_data, fragment_len, txctl, cookie);
}

static s8 b43_rssi_postprocess(struct b43_wldev *dev,
			       u8 in_rssi, int ofdm,
			       int adjust_2053, int adjust_2050)
{
	struct b43_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 {
388
			if (dev->dev->bus->sprom.
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
			    boardflags_lo & B43_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 == B43_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;
}

//TODO
#if 0
static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi)
{
	struct b43_phy *phy = &dev->phy;
	s8 ret;

	if (phy->type == B43_PHYTYPE_A) {
		//TODO: Incomplete specs.
		ret = 0;
	} else
		ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1);

	return ret;
}
#endif

void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
{
	struct ieee80211_rx_status status;
	struct b43_plcp_hdr6 *plcp;
	struct ieee80211_hdr *wlhdr;
	const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;
	u16 fctl;
	u16 phystat0, phystat3, chanstat, 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 = le32_to_cpu(rxhdr->mac_status);
	mactime = le16_to_cpu(rxhdr->mac_time);
	chanstat = le16_to_cpu(rxhdr->channel);

	if (macstat & B43_RX_MAC_FCSERR)
		dev->wl->ieee_stats.dot11FCSErrorCount++;
	if (macstat & B43_RX_MAC_DECERR) {
		/* Decryption with the given key failed.
		 * Drop the packet. We also won't be able to decrypt it with
		 * the key in software. */
		goto drop;
	}

	/* Skip PLCP and padding */
	padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
	if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {
		b43dbg(dev->wl, "RX: Packet size underrun (1)\n");
		goto drop;
	}
	plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);
	skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);
	/* The skb contains the Wireless Header + payload data now */
	if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */  + FCS_LEN))) {
		b43dbg(dev->wl, "RX: Packet size underrun (2)\n");
		goto drop;
	}
	wlhdr = (struct ieee80211_hdr *)(skb->data);
	fctl = le16_to_cpu(wlhdr->frame_control);
	skb_trim(skb, skb->len - FCS_LEN);

	if (macstat & B43_RX_MAC_DEC) {
		unsigned int keyidx;
		int wlhdr_len;

		keyidx = ((macstat & B43_RX_MAC_KEYIDX)
			  >> B43_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 = b43_kidx_to_raw(dev, keyidx);
		B43_WARN_ON(keyidx >= dev->max_nr_keys);

		if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
			wlhdr_len = ieee80211_get_hdrlen(fctl);
			if (unlikely(skb->len < (wlhdr_len + 3))) {
				b43dbg(dev->wl,
				       "RX: Packet size underrun (3)\n");
				goto drop;
			}
			status.flag |= RX_FLAG_DECRYPTED;
		}
	}

	status.ssi = b43_rssi_postprocess(dev, jssi,
					  (phystat0 & B43_RX_PHYST0_OFDM),
					  (phystat0 & B43_RX_PHYST0_GAINCTL),
					  (phystat3 & B43_RX_PHYST3_TRSTATE));
	status.noise = dev->stats.link_noise;
	/* the next line looks wrong, but is what mac80211 wants */
	status.signal = (jssi * 100) / B43_RX_MAX_SSI;
	if (phystat0 & B43_RX_PHYST0_OFDM)
		status.rate = b43_plcp_get_bitrate_ofdm(plcp);
	else
		status.rate = b43_plcp_get_bitrate_cck(plcp);
	status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
	status.mactime = mactime;
530
	status.flag |= RX_FLAG_TSFT;
531
532
533
534
535

	chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
	switch (chanstat & B43_RX_CHAN_PHYTYPE) {
	case B43_PHYTYPE_A:
		status.phymode = MODE_IEEE80211A;
536
537
538
539
540
		B43_WARN_ON(1);
		/* FIXME: We don't really know which value the "chanid" contains.
		 *        So the following assignment might be wrong. */
		status.channel = chanid;
		status.freq = b43_channel_to_freq_5ghz(status.channel);
541
542
543
		break;
	case B43_PHYTYPE_G:
		status.phymode = MODE_IEEE80211G;
544
545
		/* chanid is the radio channel cookie value as used
		 * to tune the radio. */
546
		status.freq = chanid + 2400;
547
548
549
550
551
552
553
554
555
556
557
		status.channel = b43_freq_to_channel_2ghz(status.freq);
		break;
	case B43_PHYTYPE_N:
		status.phymode = 0xDEAD /*FIXME MODE_IEEE80211N*/;
		/* chanid is the SHM channel cookie. Which is the plain
		 * channel number in b43. */
		status.channel = chanid;
		if (chanstat & B43_RX_CHAN_5GHZ)
			status.freq = b43_freq_to_channel_5ghz(status.freq);
		else
			status.freq = b43_freq_to_channel_2ghz(status.freq);
558
559
560
		break;
	default:
		B43_WARN_ON(1);
561
		goto drop;
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
	}

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

	return;
drop:
	b43dbg(dev->wl, "RX: Packet dropped\n");
	dev_kfree_skb_any(skb);
}

void b43_handle_txstatus(struct b43_wldev *dev,
			 const struct b43_txstatus *status)
{
	b43_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 (b43_using_pio(dev))
		b43_pio_handle_txstatus(dev, status);
	else
		b43_dma_handle_txstatus(dev, status);
}

/* Handle TX status report as received through DMA/PIO queues */
void b43_handle_hwtxstatus(struct b43_wldev *dev,
			   const struct b43_hwtxstatus *hw)
{
	struct b43_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;
	status.supp_reason = ((tmp & 0x1C) >> 2);
	status.pm_indicated = !!(tmp & 0x80);
	status.intermediate = !!(tmp & 0x40);
	status.for_ampdu = !!(tmp & 0x20);
	status.acked = !!(tmp & 0x02);

	b43_handle_txstatus(dev, &status);
}

/* Stop any TX operation on the device (suspend the hardware queues) */
void b43_tx_suspend(struct b43_wldev *dev)
{
	if (b43_using_pio(dev))
		b43_pio_freeze_txqueues(dev);
	else
		b43_dma_tx_suspend(dev);
}

/* Resume any TX operation on the device (resume the hardware queues) */
void b43_tx_resume(struct b43_wldev *dev)
{
	if (b43_using_pio(dev))
		b43_pio_thaw_txqueues(dev);
	else
		b43_dma_tx_resume(dev);
}

#if 0
static void upload_qos_parms(struct b43_wldev *dev,
			     const u16 * parms, u16 offset)
{
	int i;

	for (i = 0; i < B43_NR_QOSPARMS; i++) {
		b43_shm_write16(dev, B43_SHM_SHARED,
				offset + (i * 2), parms[i]);
	}
}
#endif

/* Initialize the QoS parameters */
void b43_qos_init(struct b43_wldev *dev)
{
	/* FIXME: This function must probably be called from the mac80211
	 * config callback. */
	return;

	b43_hf_write(dev, b43_hf_read(dev) | B43_HF_EDCF);
	//FIXME kill magic
	b43_write16(dev, 0x688, b43_read16(dev, 0x688) | 0x4);

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