mac80211/drivers: rewrite the rate control API
[linux-2.6.git] / drivers / net / wireless / b43legacy / xmit.c
1 /*
2
3   Broadcom B43legacy wireless driver
4
5   Transmission (TX/RX) related functions.
6
7   Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
8   Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
9   Copyright (C) 2005, 2006 Michael Buesch <mb@bu3sch.de>
10   Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
11   Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
12   Copyright (C) 2007 Larry Finger <Larry.Finger@lwfinger.net>
13
14   This program is free software; you can redistribute it and/or modify
15   it under the terms of the GNU General Public License as published by
16   the Free Software Foundation; either version 2 of the License, or
17   (at your option) any later version.
18
19   This program is distributed in the hope that it will be useful,
20   but WITHOUT ANY WARRANTY; without even the implied warranty of
21   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22   GNU General Public License for more details.
23
24   You should have received a copy of the GNU General Public License
25   along with this program; see the file COPYING.  If not, write to
26   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
27   Boston, MA 02110-1301, USA.
28
29 */
30
31 #include <net/dst.h>
32
33 #include "xmit.h"
34 #include "phy.h"
35 #include "dma.h"
36 #include "pio.h"
37
38
39 /* Extract the bitrate out of a CCK PLCP header. */
40 static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
41 {
42         switch (plcp->raw[0]) {
43         case 0x0A:
44                 return 0;
45         case 0x14:
46                 return 1;
47         case 0x37:
48                 return 2;
49         case 0x6E:
50                 return 3;
51         }
52         B43legacy_BUG_ON(1);
53         return -1;
54 }
55
56 /* Extract the bitrate out of an OFDM PLCP header. */
57 static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
58                                               bool aphy)
59 {
60         int base = aphy ? 0 : 4;
61
62         switch (plcp->raw[0] & 0xF) {
63         case 0xB:
64                 return base + 0;
65         case 0xF:
66                 return base + 1;
67         case 0xA:
68                 return base + 2;
69         case 0xE:
70                 return base + 3;
71         case 0x9:
72                 return base + 4;
73         case 0xD:
74                 return base + 5;
75         case 0x8:
76                 return base + 6;
77         case 0xC:
78                 return base + 7;
79         }
80         B43legacy_BUG_ON(1);
81         return -1;
82 }
83
84 u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
85 {
86         switch (bitrate) {
87         case B43legacy_CCK_RATE_1MB:
88                 return 0x0A;
89         case B43legacy_CCK_RATE_2MB:
90                 return 0x14;
91         case B43legacy_CCK_RATE_5MB:
92                 return 0x37;
93         case B43legacy_CCK_RATE_11MB:
94                 return 0x6E;
95         }
96         B43legacy_BUG_ON(1);
97         return 0;
98 }
99
100 u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
101 {
102         switch (bitrate) {
103         case B43legacy_OFDM_RATE_6MB:
104                 return 0xB;
105         case B43legacy_OFDM_RATE_9MB:
106                 return 0xF;
107         case B43legacy_OFDM_RATE_12MB:
108                 return 0xA;
109         case B43legacy_OFDM_RATE_18MB:
110                 return 0xE;
111         case B43legacy_OFDM_RATE_24MB:
112                 return 0x9;
113         case B43legacy_OFDM_RATE_36MB:
114                 return 0xD;
115         case B43legacy_OFDM_RATE_48MB:
116                 return 0x8;
117         case B43legacy_OFDM_RATE_54MB:
118                 return 0xC;
119         }
120         B43legacy_BUG_ON(1);
121         return 0;
122 }
123
124 void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
125                                  const u16 octets, const u8 bitrate)
126 {
127         __le32 *data = &(plcp->data);
128         __u8 *raw = plcp->raw;
129
130         if (b43legacy_is_ofdm_rate(bitrate)) {
131                 u16 d;
132
133                 d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
134                 B43legacy_WARN_ON(octets & 0xF000);
135                 d |= (octets << 5);
136                 *data = cpu_to_le32(d);
137         } else {
138                 u32 plen;
139
140                 plen = octets * 16 / bitrate;
141                 if ((octets * 16 % bitrate) > 0) {
142                         plen++;
143                         if ((bitrate == B43legacy_CCK_RATE_11MB)
144                             && ((octets * 8 % 11) < 4))
145                                 raw[1] = 0x84;
146                         else
147                                 raw[1] = 0x04;
148                 } else
149                         raw[1] = 0x04;
150                 *data |= cpu_to_le32(plen << 16);
151                 raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
152         }
153 }
154
155 static u8 b43legacy_calc_fallback_rate(u8 bitrate)
156 {
157         switch (bitrate) {
158         case B43legacy_CCK_RATE_1MB:
159                 return B43legacy_CCK_RATE_1MB;
160         case B43legacy_CCK_RATE_2MB:
161                 return B43legacy_CCK_RATE_1MB;
162         case B43legacy_CCK_RATE_5MB:
163                 return B43legacy_CCK_RATE_2MB;
164         case B43legacy_CCK_RATE_11MB:
165                 return B43legacy_CCK_RATE_5MB;
166         case B43legacy_OFDM_RATE_6MB:
167                 return B43legacy_CCK_RATE_5MB;
168         case B43legacy_OFDM_RATE_9MB:
169                 return B43legacy_OFDM_RATE_6MB;
170         case B43legacy_OFDM_RATE_12MB:
171                 return B43legacy_OFDM_RATE_9MB;
172         case B43legacy_OFDM_RATE_18MB:
173                 return B43legacy_OFDM_RATE_12MB;
174         case B43legacy_OFDM_RATE_24MB:
175                 return B43legacy_OFDM_RATE_18MB;
176         case B43legacy_OFDM_RATE_36MB:
177                 return B43legacy_OFDM_RATE_24MB;
178         case B43legacy_OFDM_RATE_48MB:
179                 return B43legacy_OFDM_RATE_36MB;
180         case B43legacy_OFDM_RATE_54MB:
181                 return B43legacy_OFDM_RATE_48MB;
182         }
183         B43legacy_BUG_ON(1);
184         return 0;
185 }
186
187 static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
188                                struct b43legacy_txhdr_fw3 *txhdr,
189                                const unsigned char *fragment_data,
190                                unsigned int fragment_len,
191                                struct ieee80211_tx_info *info,
192                                u16 cookie)
193 {
194         const struct ieee80211_hdr *wlhdr;
195         int use_encryption = !!info->control.hw_key;
196         u8 rate;
197         struct ieee80211_rate *rate_fb;
198         int rate_ofdm;
199         int rate_fb_ofdm;
200         unsigned int plcp_fragment_len;
201         u32 mac_ctl = 0;
202         u16 phy_ctl = 0;
203         struct ieee80211_rate *tx_rate;
204         struct ieee80211_tx_rate *rates;
205
206         wlhdr = (const struct ieee80211_hdr *)fragment_data;
207
208         memset(txhdr, 0, sizeof(*txhdr));
209
210         tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);
211
212         rate = tx_rate->hw_value;
213         rate_ofdm = b43legacy_is_ofdm_rate(rate);
214         rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
215         rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
216
217         txhdr->mac_frame_ctl = wlhdr->frame_control;
218         memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
219
220         /* Calculate duration for fallback rate */
221         if ((rate_fb->hw_value == rate) ||
222             (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
223             (wlhdr->duration_id == cpu_to_le16(0))) {
224                 /* If the fallback rate equals the normal rate or the
225                  * dur_id field contains an AID, CFP magic or 0,
226                  * use the original dur_id field. */
227                 txhdr->dur_fb = wlhdr->duration_id;
228         } else {
229                 txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
230                                                          info->control.vif,
231                                                          fragment_len,
232                                                          rate_fb);
233         }
234
235         plcp_fragment_len = fragment_len + FCS_LEN;
236         if (use_encryption) {
237                 u8 key_idx = info->control.hw_key->hw_key_idx;
238                 struct b43legacy_key *key;
239                 int wlhdr_len;
240                 size_t iv_len;
241
242                 B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
243                 key = &(dev->key[key_idx]);
244
245                 if (key->enabled) {
246                         /* Hardware appends ICV. */
247                         plcp_fragment_len += info->control.hw_key->icv_len;
248
249                         key_idx = b43legacy_kidx_to_fw(dev, key_idx);
250                         mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
251                                    B43legacy_TX4_MAC_KEYIDX;
252                         mac_ctl |= (key->algorithm <<
253                                    B43legacy_TX4_MAC_KEYALG_SHIFT) &
254                                    B43legacy_TX4_MAC_KEYALG;
255                         wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
256                         iv_len = min((size_t)info->control.hw_key->iv_len,
257                                      ARRAY_SIZE(txhdr->iv));
258                         memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
259                 } else {
260                         /* This key is invalid. This might only happen
261                          * in a short timeframe after machine resume before
262                          * we were able to reconfigure keys.
263                          * Drop this packet completely. Do not transmit it
264                          * unencrypted to avoid leaking information. */
265                         return -ENOKEY;
266                 }
267         }
268         b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
269                                     (&txhdr->plcp), plcp_fragment_len,
270                                     rate);
271         b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
272                                     (&txhdr->plcp_fb), plcp_fragment_len,
273                                     rate_fb->hw_value);
274
275         /* PHY TX Control word */
276         if (rate_ofdm)
277                 phy_ctl |= B43legacy_TX4_PHY_OFDM;
278         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
279                 phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
280         switch (info->antenna_sel_tx) {
281         case 0:
282                 phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
283                 break;
284         case 1:
285                 phy_ctl |= B43legacy_TX4_PHY_ANT0;
286                 break;
287         case 2:
288                 phy_ctl |= B43legacy_TX4_PHY_ANT1;
289                 break;
290         default:
291                 B43legacy_BUG_ON(1);
292         }
293
294         /* MAC control */
295         rates = info->control.rates;
296         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
297                 mac_ctl |= B43legacy_TX4_MAC_ACK;
298         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
299                 mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
300         if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
301                 mac_ctl |= B43legacy_TX4_MAC_STMSDU;
302         if (rate_fb_ofdm)
303                 mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
304
305         /* Overwrite rates[0].count to make the retry calculation
306          * in the tx status easier. need the actual retry limit to
307          * detect whether the fallback rate was used.
308          */
309         if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
310             (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
311                 rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
312                 mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
313         } else {
314                 rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
315         }
316
317         /* Generate the RTS or CTS-to-self frame */
318         if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
319             (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
320                 unsigned int len;
321                 struct ieee80211_hdr *hdr;
322                 int rts_rate;
323                 int rts_rate_fb;
324                 int rts_rate_ofdm;
325                 int rts_rate_fb_ofdm;
326
327                 rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
328                 rts_rate_ofdm = b43legacy_is_ofdm_rate(rts_rate);
329                 rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
330                 rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
331                 if (rts_rate_fb_ofdm)
332                         mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
333
334                 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
335                         ieee80211_ctstoself_get(dev->wl->hw,
336                                                 info->control.vif,
337                                                 fragment_data,
338                                                 fragment_len, info,
339                                                 (struct ieee80211_cts *)
340                                                 (txhdr->rts_frame));
341                         mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
342                         len = sizeof(struct ieee80211_cts);
343                 } else {
344                         ieee80211_rts_get(dev->wl->hw,
345                                           info->control.vif,
346                                           fragment_data, fragment_len, info,
347                                           (struct ieee80211_rts *)
348                                           (txhdr->rts_frame));
349                         mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
350                         len = sizeof(struct ieee80211_rts);
351                 }
352                 len += FCS_LEN;
353                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
354                                             (&txhdr->rts_plcp),
355                                             len, rts_rate);
356                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
357                                             (&txhdr->rts_plcp_fb),
358                                             len, rts_rate_fb);
359                 hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
360                 txhdr->rts_dur_fb = hdr->duration_id;
361         }
362
363         /* Magic cookie */
364         txhdr->cookie = cpu_to_le16(cookie);
365
366         /* Apply the bitfields */
367         txhdr->mac_ctl = cpu_to_le32(mac_ctl);
368         txhdr->phy_ctl = cpu_to_le16(phy_ctl);
369
370         return 0;
371 }
372
373 int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
374                               u8 *txhdr,
375                               const unsigned char *fragment_data,
376                               unsigned int fragment_len,
377                               struct ieee80211_tx_info *info,
378                               u16 cookie)
379 {
380         return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
381                            fragment_data, fragment_len,
382                            info, cookie);
383 }
384
385 static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
386                                      u8 in_rssi, int ofdm,
387                                      int adjust_2053, int adjust_2050)
388 {
389         struct b43legacy_phy *phy = &dev->phy;
390         s32 tmp;
391
392         switch (phy->radio_ver) {
393         case 0x2050:
394                 if (ofdm) {
395                         tmp = in_rssi;
396                         if (tmp > 127)
397                                 tmp -= 256;
398                         tmp *= 73;
399                         tmp /= 64;
400                         if (adjust_2050)
401                                 tmp += 25;
402                         else
403                                 tmp -= 3;
404                 } else {
405                         if (dev->dev->bus->sprom.boardflags_lo
406                             & B43legacy_BFL_RSSI) {
407                                 if (in_rssi > 63)
408                                         in_rssi = 63;
409                                 tmp = phy->nrssi_lt[in_rssi];
410                                 tmp = 31 - tmp;
411                                 tmp *= -131;
412                                 tmp /= 128;
413                                 tmp -= 57;
414                         } else {
415                                 tmp = in_rssi;
416                                 tmp = 31 - tmp;
417                                 tmp *= -149;
418                                 tmp /= 128;
419                                 tmp -= 68;
420                         }
421                         if (phy->type == B43legacy_PHYTYPE_G &&
422                             adjust_2050)
423                                 tmp += 25;
424                 }
425                 break;
426         case 0x2060:
427                 if (in_rssi > 127)
428                         tmp = in_rssi - 256;
429                 else
430                         tmp = in_rssi;
431                 break;
432         default:
433                 tmp = in_rssi;
434                 tmp -= 11;
435                 tmp *= 103;
436                 tmp /= 64;
437                 if (adjust_2053)
438                         tmp -= 109;
439                 else
440                         tmp -= 83;
441         }
442
443         return (s8)tmp;
444 }
445
446 void b43legacy_rx(struct b43legacy_wldev *dev,
447                   struct sk_buff *skb,
448                   const void *_rxhdr)
449 {
450         struct ieee80211_rx_status status;
451         struct b43legacy_plcp_hdr6 *plcp;
452         struct ieee80211_hdr *wlhdr;
453         const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
454         __le16 fctl;
455         u16 phystat0;
456         u16 phystat3;
457         u16 chanstat;
458         u16 mactime;
459         u32 macstat;
460         u16 chanid;
461         u8 jssi;
462         int padding;
463
464         memset(&status, 0, sizeof(status));
465
466         /* Get metadata about the frame from the header. */
467         phystat0 = le16_to_cpu(rxhdr->phy_status0);
468         phystat3 = le16_to_cpu(rxhdr->phy_status3);
469         jssi = rxhdr->jssi;
470         macstat = le16_to_cpu(rxhdr->mac_status);
471         mactime = le16_to_cpu(rxhdr->mac_time);
472         chanstat = le16_to_cpu(rxhdr->channel);
473
474         if (macstat & B43legacy_RX_MAC_FCSERR)
475                 dev->wl->ieee_stats.dot11FCSErrorCount++;
476
477         /* Skip PLCP and padding */
478         padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
479         if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
480             padding))) {
481                 b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
482                 goto drop;
483         }
484         plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
485         skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
486         /* The skb contains the Wireless Header + payload data now */
487         if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
488                 b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
489                 goto drop;
490         }
491         wlhdr = (struct ieee80211_hdr *)(skb->data);
492         fctl = wlhdr->frame_control;
493
494         if ((macstat & B43legacy_RX_MAC_DEC) &&
495             !(macstat & B43legacy_RX_MAC_DECERR)) {
496                 unsigned int keyidx;
497                 int wlhdr_len;
498                 int iv_len;
499                 int icv_len;
500
501                 keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
502                           >> B43legacy_RX_MAC_KEYIDX_SHIFT);
503                 /* We must adjust the key index here. We want the "physical"
504                  * key index, but the ucode passed it slightly different.
505                  */
506                 keyidx = b43legacy_kidx_to_raw(dev, keyidx);
507                 B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
508
509                 if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
510                         /* Remove PROTECTED flag to mark it as decrypted. */
511                         B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
512                         fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
513                         wlhdr->frame_control = fctl;
514
515                         wlhdr_len = ieee80211_hdrlen(fctl);
516                         if (unlikely(skb->len < (wlhdr_len + 3))) {
517                                 b43legacydbg(dev->wl, "RX: Packet size"
518                                              " underrun3\n");
519                                 goto drop;
520                         }
521                         if (skb->data[wlhdr_len + 3] & (1 << 5)) {
522                                 /* The Ext-IV Bit is set in the "KeyID"
523                                  * octet of the IV.
524                                  */
525                                 iv_len = 8;
526                                 icv_len = 8;
527                         } else {
528                                 iv_len = 4;
529                                 icv_len = 4;
530                         }
531                         if (unlikely(skb->len < (wlhdr_len + iv_len +
532                             icv_len))) {
533                                 b43legacydbg(dev->wl, "RX: Packet size"
534                                              " underrun4\n");
535                                 goto drop;
536                         }
537                         /* Remove the IV */
538                         memmove(skb->data + iv_len, skb->data, wlhdr_len);
539                         skb_pull(skb, iv_len);
540                         /* Remove the ICV */
541                         skb_trim(skb, skb->len - icv_len);
542
543                         status.flag |= RX_FLAG_DECRYPTED;
544                 }
545         }
546
547         status.signal = b43legacy_rssi_postprocess(dev, jssi,
548                                       (phystat0 & B43legacy_RX_PHYST0_OFDM),
549                                       (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
550                                       (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
551         status.noise = dev->stats.link_noise;
552         status.qual = (jssi * 100) / B43legacy_RX_MAX_SSI;
553         /* change to support A PHY */
554         if (phystat0 & B43legacy_RX_PHYST0_OFDM)
555                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
556         else
557                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
558         status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
559
560         /*
561          * All frames on monitor interfaces and beacons always need a full
562          * 64-bit timestamp. Monitor interfaces need it for diagnostic
563          * purposes and beacons for IBSS merging.
564          * This code assumes we get to process the packet within 16 bits
565          * of timestamp, i.e. about 65 milliseconds after the PHY received
566          * the first symbol.
567          */
568         if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
569                 u16 low_mactime_now;
570
571                 b43legacy_tsf_read(dev, &status.mactime);
572                 low_mactime_now = status.mactime;
573                 status.mactime = status.mactime & ~0xFFFFULL;
574                 status.mactime += mactime;
575                 if (low_mactime_now <= mactime)
576                         status.mactime -= 0x10000;
577                 status.flag |= RX_FLAG_TSFT;
578         }
579
580         chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
581                   B43legacy_RX_CHAN_ID_SHIFT;
582         switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
583         case B43legacy_PHYTYPE_B:
584         case B43legacy_PHYTYPE_G:
585                 status.band = IEEE80211_BAND_2GHZ;
586                 status.freq = chanid + 2400;
587                 break;
588         default:
589                 b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
590                        chanstat);
591         }
592
593         dev->stats.last_rx = jiffies;
594         ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
595
596         return;
597 drop:
598         b43legacydbg(dev->wl, "RX: Packet dropped\n");
599         dev_kfree_skb_any(skb);
600 }
601
602 void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
603                              const struct b43legacy_txstatus *status)
604 {
605         b43legacy_debugfs_log_txstat(dev, status);
606
607         if (status->intermediate)
608                 return;
609         if (status->for_ampdu)
610                 return;
611         if (!status->acked)
612                 dev->wl->ieee_stats.dot11ACKFailureCount++;
613         if (status->rts_count) {
614                 if (status->rts_count == 0xF) /* FIXME */
615                         dev->wl->ieee_stats.dot11RTSFailureCount++;
616                 else
617                         dev->wl->ieee_stats.dot11RTSSuccessCount++;
618         }
619
620         if (b43legacy_using_pio(dev))
621                 b43legacy_pio_handle_txstatus(dev, status);
622         else
623                 b43legacy_dma_handle_txstatus(dev, status);
624 }
625
626 /* Handle TX status report as received through DMA/PIO queues */
627 void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
628                                  const struct b43legacy_hwtxstatus *hw)
629 {
630         struct b43legacy_txstatus status;
631         u8 tmp;
632
633         status.cookie = le16_to_cpu(hw->cookie);
634         status.seq = le16_to_cpu(hw->seq);
635         status.phy_stat = hw->phy_stat;
636         tmp = hw->count;
637         status.frame_count = (tmp >> 4);
638         status.rts_count = (tmp & 0x0F);
639         tmp = hw->flags << 1;
640         status.supp_reason = ((tmp & 0x1C) >> 2);
641         status.pm_indicated = !!(tmp & 0x80);
642         status.intermediate = !!(tmp & 0x40);
643         status.for_ampdu = !!(tmp & 0x20);
644         status.acked = !!(tmp & 0x02);
645
646         b43legacy_handle_txstatus(dev, &status);
647 }
648
649 /* Stop any TX operation on the device (suspend the hardware queues) */
650 void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
651 {
652         if (b43legacy_using_pio(dev))
653                 b43legacy_pio_freeze_txqueues(dev);
654         else
655                 b43legacy_dma_tx_suspend(dev);
656 }
657
658 /* Resume any TX operation on the device (resume the hardware queues) */
659 void b43legacy_tx_resume(struct b43legacy_wldev *dev)
660 {
661         if (b43legacy_using_pio(dev))
662                 b43legacy_pio_thaw_txqueues(dev);
663         else
664                 b43legacy_dma_tx_resume(dev);
665 }
666
667 /* Initialize the QoS parameters */
668 void b43legacy_qos_init(struct b43legacy_wldev *dev)
669 {
670         /* FIXME: This function must probably be called from the mac80211
671          * config callback. */
672 return;
673
674         b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
675         /* FIXME kill magic */
676         b43legacy_write16(dev, 0x688,
677                           b43legacy_read16(dev, 0x688) | 0x4);
678
679
680         /*TODO: We might need some stack support here to get the values. */
681 }