Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[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_ENC_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_fb_ofdm;
325
326                 rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
327                 rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
328                 rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
329                 if (rts_rate_fb_ofdm)
330                         mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
331
332                 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
333                         ieee80211_ctstoself_get(dev->wl->hw,
334                                                 info->control.vif,
335                                                 fragment_data,
336                                                 fragment_len, info,
337                                                 (struct ieee80211_cts *)
338                                                 (txhdr->rts_frame));
339                         mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
340                         len = sizeof(struct ieee80211_cts);
341                 } else {
342                         ieee80211_rts_get(dev->wl->hw,
343                                           info->control.vif,
344                                           fragment_data, fragment_len, info,
345                                           (struct ieee80211_rts *)
346                                           (txhdr->rts_frame));
347                         mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
348                         len = sizeof(struct ieee80211_rts);
349                 }
350                 len += FCS_LEN;
351                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
352                                             (&txhdr->rts_plcp),
353                                             len, rts_rate);
354                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
355                                             (&txhdr->rts_plcp_fb),
356                                             len, rts_rate_fb);
357                 hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
358                 txhdr->rts_dur_fb = hdr->duration_id;
359         }
360
361         /* Magic cookie */
362         txhdr->cookie = cpu_to_le16(cookie);
363
364         /* Apply the bitfields */
365         txhdr->mac_ctl = cpu_to_le32(mac_ctl);
366         txhdr->phy_ctl = cpu_to_le16(phy_ctl);
367
368         return 0;
369 }
370
371 int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
372                               u8 *txhdr,
373                               const unsigned char *fragment_data,
374                               unsigned int fragment_len,
375                               struct ieee80211_tx_info *info,
376                               u16 cookie)
377 {
378         return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
379                            fragment_data, fragment_len,
380                            info, cookie);
381 }
382
383 static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
384                                      u8 in_rssi, int ofdm,
385                                      int adjust_2053, int adjust_2050)
386 {
387         struct b43legacy_phy *phy = &dev->phy;
388         s32 tmp;
389
390         switch (phy->radio_ver) {
391         case 0x2050:
392                 if (ofdm) {
393                         tmp = in_rssi;
394                         if (tmp > 127)
395                                 tmp -= 256;
396                         tmp *= 73;
397                         tmp /= 64;
398                         if (adjust_2050)
399                                 tmp += 25;
400                         else
401                                 tmp -= 3;
402                 } else {
403                         if (dev->dev->bus->sprom.boardflags_lo
404                             & B43legacy_BFL_RSSI) {
405                                 if (in_rssi > 63)
406                                         in_rssi = 63;
407                                 tmp = phy->nrssi_lt[in_rssi];
408                                 tmp = 31 - tmp;
409                                 tmp *= -131;
410                                 tmp /= 128;
411                                 tmp -= 57;
412                         } else {
413                                 tmp = in_rssi;
414                                 tmp = 31 - tmp;
415                                 tmp *= -149;
416                                 tmp /= 128;
417                                 tmp -= 68;
418                         }
419                         if (phy->type == B43legacy_PHYTYPE_G &&
420                             adjust_2050)
421                                 tmp += 25;
422                 }
423                 break;
424         case 0x2060:
425                 if (in_rssi > 127)
426                         tmp = in_rssi - 256;
427                 else
428                         tmp = in_rssi;
429                 break;
430         default:
431                 tmp = in_rssi;
432                 tmp -= 11;
433                 tmp *= 103;
434                 tmp /= 64;
435                 if (adjust_2053)
436                         tmp -= 109;
437                 else
438                         tmp -= 83;
439         }
440
441         return (s8)tmp;
442 }
443
444 void b43legacy_rx(struct b43legacy_wldev *dev,
445                   struct sk_buff *skb,
446                   const void *_rxhdr)
447 {
448         struct ieee80211_rx_status status;
449         struct b43legacy_plcp_hdr6 *plcp;
450         struct ieee80211_hdr *wlhdr;
451         const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
452         __le16 fctl;
453         u16 phystat0;
454         u16 phystat3;
455         u16 chanstat;
456         u16 mactime;
457         u32 macstat;
458         u16 chanid;
459         u8 jssi;
460         int padding;
461
462         memset(&status, 0, sizeof(status));
463
464         /* Get metadata about the frame from the header. */
465         phystat0 = le16_to_cpu(rxhdr->phy_status0);
466         phystat3 = le16_to_cpu(rxhdr->phy_status3);
467         jssi = rxhdr->jssi;
468         macstat = le16_to_cpu(rxhdr->mac_status);
469         mactime = le16_to_cpu(rxhdr->mac_time);
470         chanstat = le16_to_cpu(rxhdr->channel);
471
472         if (macstat & B43legacy_RX_MAC_FCSERR)
473                 dev->wl->ieee_stats.dot11FCSErrorCount++;
474
475         /* Skip PLCP and padding */
476         padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
477         if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
478             padding))) {
479                 b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
480                 goto drop;
481         }
482         plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
483         skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
484         /* The skb contains the Wireless Header + payload data now */
485         if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
486                 b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
487                 goto drop;
488         }
489         wlhdr = (struct ieee80211_hdr *)(skb->data);
490         fctl = wlhdr->frame_control;
491
492         if ((macstat & B43legacy_RX_MAC_DEC) &&
493             !(macstat & B43legacy_RX_MAC_DECERR)) {
494                 unsigned int keyidx;
495                 int wlhdr_len;
496                 int iv_len;
497                 int icv_len;
498
499                 keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
500                           >> B43legacy_RX_MAC_KEYIDX_SHIFT);
501                 /* We must adjust the key index here. We want the "physical"
502                  * key index, but the ucode passed it slightly different.
503                  */
504                 keyidx = b43legacy_kidx_to_raw(dev, keyidx);
505                 B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
506
507                 if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
508                         /* Remove PROTECTED flag to mark it as decrypted. */
509                         B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
510                         fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
511                         wlhdr->frame_control = fctl;
512
513                         wlhdr_len = ieee80211_hdrlen(fctl);
514                         if (unlikely(skb->len < (wlhdr_len + 3))) {
515                                 b43legacydbg(dev->wl, "RX: Packet size"
516                                              " underrun3\n");
517                                 goto drop;
518                         }
519                         if (skb->data[wlhdr_len + 3] & (1 << 5)) {
520                                 /* The Ext-IV Bit is set in the "KeyID"
521                                  * octet of the IV.
522                                  */
523                                 iv_len = 8;
524                                 icv_len = 8;
525                         } else {
526                                 iv_len = 4;
527                                 icv_len = 4;
528                         }
529                         if (unlikely(skb->len < (wlhdr_len + iv_len +
530                             icv_len))) {
531                                 b43legacydbg(dev->wl, "RX: Packet size"
532                                              " underrun4\n");
533                                 goto drop;
534                         }
535                         /* Remove the IV */
536                         memmove(skb->data + iv_len, skb->data, wlhdr_len);
537                         skb_pull(skb, iv_len);
538                         /* Remove the ICV */
539                         skb_trim(skb, skb->len - icv_len);
540
541                         status.flag |= RX_FLAG_DECRYPTED;
542                 }
543         }
544
545         status.signal = b43legacy_rssi_postprocess(dev, jssi,
546                                       (phystat0 & B43legacy_RX_PHYST0_OFDM),
547                                       (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
548                                       (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
549         /* change to support A PHY */
550         if (phystat0 & B43legacy_RX_PHYST0_OFDM)
551                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
552         else
553                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
554         status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
555
556         /*
557          * All frames on monitor interfaces and beacons always need a full
558          * 64-bit timestamp. Monitor interfaces need it for diagnostic
559          * purposes and beacons for IBSS merging.
560          * This code assumes we get to process the packet within 16 bits
561          * of timestamp, i.e. about 65 milliseconds after the PHY received
562          * the first symbol.
563          */
564         if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
565                 u16 low_mactime_now;
566
567                 b43legacy_tsf_read(dev, &status.mactime);
568                 low_mactime_now = status.mactime;
569                 status.mactime = status.mactime & ~0xFFFFULL;
570                 status.mactime += mactime;
571                 if (low_mactime_now <= mactime)
572                         status.mactime -= 0x10000;
573                 status.flag |= RX_FLAG_MACTIME_MPDU;
574         }
575
576         chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
577                   B43legacy_RX_CHAN_ID_SHIFT;
578         switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
579         case B43legacy_PHYTYPE_B:
580         case B43legacy_PHYTYPE_G:
581                 status.band = IEEE80211_BAND_2GHZ;
582                 status.freq = chanid + 2400;
583                 break;
584         default:
585                 b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
586                        chanstat);
587         }
588
589         memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
590         ieee80211_rx_irqsafe(dev->wl->hw, skb);
591
592         return;
593 drop:
594         b43legacydbg(dev->wl, "RX: Packet dropped\n");
595         dev_kfree_skb_any(skb);
596 }
597
598 void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
599                              const struct b43legacy_txstatus *status)
600 {
601         b43legacy_debugfs_log_txstat(dev, status);
602
603         if (status->intermediate)
604                 return;
605         if (status->for_ampdu)
606                 return;
607         if (!status->acked)
608                 dev->wl->ieee_stats.dot11ACKFailureCount++;
609         if (status->rts_count) {
610                 if (status->rts_count == 0xF) /* FIXME */
611                         dev->wl->ieee_stats.dot11RTSFailureCount++;
612                 else
613                         dev->wl->ieee_stats.dot11RTSSuccessCount++;
614         }
615
616         if (b43legacy_using_pio(dev))
617                 b43legacy_pio_handle_txstatus(dev, status);
618         else
619                 b43legacy_dma_handle_txstatus(dev, status);
620 }
621
622 /* Handle TX status report as received through DMA/PIO queues */
623 void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
624                                  const struct b43legacy_hwtxstatus *hw)
625 {
626         struct b43legacy_txstatus status;
627         u8 tmp;
628
629         status.cookie = le16_to_cpu(hw->cookie);
630         status.seq = le16_to_cpu(hw->seq);
631         status.phy_stat = hw->phy_stat;
632         tmp = hw->count;
633         status.frame_count = (tmp >> 4);
634         status.rts_count = (tmp & 0x0F);
635         tmp = hw->flags << 1;
636         status.supp_reason = ((tmp & 0x1C) >> 2);
637         status.pm_indicated = !!(tmp & 0x80);
638         status.intermediate = !!(tmp & 0x40);
639         status.for_ampdu = !!(tmp & 0x20);
640         status.acked = !!(tmp & 0x02);
641
642         b43legacy_handle_txstatus(dev, &status);
643 }
644
645 /* Stop any TX operation on the device (suspend the hardware queues) */
646 void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
647 {
648         if (b43legacy_using_pio(dev))
649                 b43legacy_pio_freeze_txqueues(dev);
650         else
651                 b43legacy_dma_tx_suspend(dev);
652 }
653
654 /* Resume any TX operation on the device (resume the hardware queues) */
655 void b43legacy_tx_resume(struct b43legacy_wldev *dev)
656 {
657         if (b43legacy_using_pio(dev))
658                 b43legacy_pio_thaw_txqueues(dev);
659         else
660                 b43legacy_dma_tx_resume(dev);
661 }
662
663 /* Initialize the QoS parameters */
664 void b43legacy_qos_init(struct b43legacy_wldev *dev)
665 {
666         /* FIXME: This function must probably be called from the mac80211
667          * config callback. */
668 return;
669
670         b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
671         /* FIXME kill magic */
672         b43legacy_write16(dev, 0x688,
673                           b43legacy_read16(dev, 0x688) | 0x4);
674
675
676         /*TODO: We might need some stack support here to get the values. */
677 }