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mac80211: reorder some transmit handlers
[deliverable/linux.git] / drivers / net / wireless / b43 / xmit.c
CommitLineData
e4d6b795
MB		 1/*
2
3 Broadcom B43 wireless driver
4
5 Transmission (TX/RX) related functions.
6
7 Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
1f21ad2a 8 Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
e4d6b795
MB		 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
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; see the file COPYING. If not, write to
25 the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
26 Boston, MA 02110-1301, USA.
27
28*/
29
30#include "xmit.h"
31#include "phy.h"
32#include "dma.h"
5100d5ac 33#include "pio.h"
03b29773 34
e4d6b795 35
8318d78a
JB		 36/* Extract the bitrate index out of a CCK PLCP header. */
37static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp)
e4d6b795
MB		 38{
39 switch (plcp->raw[0]) {
40 case 0x0A:
8318d78a 41 return 0;
e4d6b795 42 case 0x14:
8318d78a 43 return 1;
e4d6b795 44 case 0x37:
8318d78a 45 return 2;
e4d6b795 46 case 0x6E:
8318d78a 47 return 3;
e4d6b795
MB		 48 }
49 B43_WARN_ON(1);
8318d78a 50 return -1;
e4d6b795
MB		 51}
52
8318d78a
JB		 53/* Extract the bitrate index out of an OFDM PLCP header. */
54static u8 b43_plcp_get_bitrate_idx_ofdm(struct b43_plcp_hdr6 *plcp, bool aphy)
e4d6b795 55{
8318d78a
JB		 56 int base = aphy ? 0 : 4;
57
e4d6b795
MB		 58 switch (plcp->raw[0] & 0xF) {
59 case 0xB:
8318d78a 60 return base + 0;
e4d6b795 61 case 0xF:
8318d78a 62 return base + 1;
e4d6b795 63 case 0xA:
8318d78a 64 return base + 2;
e4d6b795 65 case 0xE:
8318d78a 66 return base + 3;
e4d6b795 67 case 0x9:
8318d78a 68 return base + 4;
e4d6b795 69 case 0xD:
8318d78a 70 return base + 5;
e4d6b795 71 case 0x8:
8318d78a 72 return base + 6;
e4d6b795 73 case 0xC:
8318d78a 74 return base + 7;
e4d6b795
MB		 75 }
76 B43_WARN_ON(1);
8318d78a 77 return -1;
e4d6b795
MB		 78}
79
80u8 b43_plcp_get_ratecode_cck(const u8 bitrate)
81{
82 switch (bitrate) {
83 case B43_CCK_RATE_1MB:
84 return 0x0A;
85 case B43_CCK_RATE_2MB:
86 return 0x14;
87 case B43_CCK_RATE_5MB:
88 return 0x37;
89 case B43_CCK_RATE_11MB:
90 return 0x6E;
91 }
92 B43_WARN_ON(1);
93 return 0;
94}
95
96u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)
97{
98 switch (bitrate) {
99 case B43_OFDM_RATE_6MB:
100 return 0xB;
101 case B43_OFDM_RATE_9MB:
102 return 0xF;
103 case B43_OFDM_RATE_12MB:
104 return 0xA;
105 case B43_OFDM_RATE_18MB:
106 return 0xE;
107 case B43_OFDM_RATE_24MB:
108 return 0x9;
109 case B43_OFDM_RATE_36MB:
110 return 0xD;
111 case B43_OFDM_RATE_48MB:
112 return 0x8;
113 case B43_OFDM_RATE_54MB:
114 return 0xC;
115 }
116 B43_WARN_ON(1);
117 return 0;
118}
119
120void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
121 const u16 octets, const u8 bitrate)
122{
123 __le32 *data = &(plcp->data);
124 __u8 *raw = plcp->raw;
125
126 if (b43_is_ofdm_rate(bitrate)) {
1a09404a
MB		 127 u32 d;
128
129 d = b43_plcp_get_ratecode_ofdm(bitrate);
e4d6b795 130 B43_WARN_ON(octets & 0xF000);
1a09404a
MB		 131 d |= (octets << 5);
132 *data = cpu_to_le32(d);
e4d6b795
MB		 133 } else {
134 u32 plen;
135
136 plen = octets * 16 / bitrate;
137 if ((octets * 16 % bitrate) > 0) {
138 plen++;
139 if ((bitrate == B43_CCK_RATE_11MB)
140 && ((octets * 8 % 11) < 4)) {
141 raw[1] = 0x84;
142 } else
143 raw[1] = 0x04;
144 } else
145 raw[1] = 0x04;
146 *data |= cpu_to_le32(plen << 16);
147 raw[0] = b43_plcp_get_ratecode_cck(bitrate);
148 }
149}
150
151static u8 b43_calc_fallback_rate(u8 bitrate)
152{
153 switch (bitrate) {
154 case B43_CCK_RATE_1MB:
155 return B43_CCK_RATE_1MB;
156 case B43_CCK_RATE_2MB:
157 return B43_CCK_RATE_1MB;
158 case B43_CCK_RATE_5MB:
159 return B43_CCK_RATE_2MB;
160 case B43_CCK_RATE_11MB:
161 return B43_CCK_RATE_5MB;
162 case B43_OFDM_RATE_6MB:
163 return B43_CCK_RATE_5MB;
164 case B43_OFDM_RATE_9MB:
165 return B43_OFDM_RATE_6MB;
166 case B43_OFDM_RATE_12MB:
167 return B43_OFDM_RATE_9MB;
168 case B43_OFDM_RATE_18MB:
169 return B43_OFDM_RATE_12MB;
170 case B43_OFDM_RATE_24MB:
171 return B43_OFDM_RATE_18MB;
172 case B43_OFDM_RATE_36MB:
173 return B43_OFDM_RATE_24MB;
174 case B43_OFDM_RATE_48MB:
175 return B43_OFDM_RATE_36MB;
176 case B43_OFDM_RATE_54MB:
177 return B43_OFDM_RATE_48MB;
178 }
179 B43_WARN_ON(1);
180 return 0;
181}
182
eb189d8b 183/* Generate a TX data header. */
09552ccd
MB		 184int b43_generate_txhdr(struct b43_wldev *dev,
185 u8 *_txhdr,
186 const unsigned char *fragment_data,
187 unsigned int fragment_len,
188 const struct ieee80211_tx_control *txctl,
189 u16 cookie)
e4d6b795 190{
eb189d8b 191 struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr;
e4d6b795
MB		 192 const struct b43_phy *phy = &dev->phy;
193 const struct ieee80211_hdr *wlhdr =
194 (const struct ieee80211_hdr *)fragment_data;
195 int use_encryption = (!(txctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT));
196 u16 fctl = le16_to_cpu(wlhdr->frame_control);
8318d78a 197 struct ieee80211_rate *fbrate;
e4d6b795
MB		 198 u8 rate, rate_fb;
199 int rate_ofdm, rate_fb_ofdm;
200 unsigned int plcp_fragment_len;
201 u32 mac_ctl = 0;
202 u16 phy_ctl = 0;
203 u8 extra_ft = 0;
2e92e6f2 204 struct ieee80211_rate *txrate;
e4d6b795
MB		 205
206 memset(txhdr, 0, sizeof(*txhdr));
207
2e92e6f2
JB		 208 txrate = ieee80211_get_tx_rate(dev->wl->hw, txctl);
209 rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;
e4d6b795 210 rate_ofdm = b43_is_ofdm_rate(rate);
2e92e6f2 211 fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, txctl) ? : txrate;
8318d78a 212 rate_fb = fbrate->hw_value;
e4d6b795
MB		 213 rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
214
215 if (rate_ofdm)
216 txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate);
217 else
218 txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate);
219 txhdr->mac_frame_ctl = wlhdr->frame_control;
220 memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
221
222 /* Calculate duration for fallback rate */
223 if ((rate_fb == rate) ||
224 (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
225 (wlhdr->duration_id == cpu_to_le16(0))) {
226 /* If the fallback rate equals the normal rate or the
227 * dur_id field contains an AID, CFP magic or 0,
228 * use the original dur_id field. */
229 txhdr->dur_fb = wlhdr->duration_id;
230 } else {
e4d6b795 231 txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
32bfd35d 232 txctl->vif,
e4d6b795 233 fragment_len,
8318d78a 234 fbrate);
e4d6b795
MB		 235 }
236
237 plcp_fragment_len = fragment_len + FCS_LEN;
238 if (use_encryption) {
1c014420 239 u8 key_idx = txctl->hw_key->hw_key_idx;
e4d6b795
MB		 240 struct b43_key *key;
241 int wlhdr_len;
242 size_t iv_len;
243
244 B43_WARN_ON(key_idx >= dev->max_nr_keys);
245 key = &(dev->key[key_idx]);
7be1bb6b 246
09552ccd
MB		 247 if (unlikely(!key->keyconf)) {
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;
7be1bb6b 254 }
09552ccd
MB		 255
256 /* Hardware appends ICV. */
257 plcp_fragment_len += txctl->icv_len;
258
259 key_idx = b43_kidx_to_fw(dev, key_idx);
260 mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
261 B43_TXH_MAC_KEYIDX;
262 mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
263 B43_TXH_MAC_KEYALG;
264 wlhdr_len = ieee80211_get_hdrlen(fctl);
265 iv_len = min((size_t) txctl->iv_len,
266 ARRAY_SIZE(txhdr->iv));
267 memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
e4d6b795 268 }
eb189d8b
MB		 269 if (b43_is_old_txhdr_format(dev)) {
270 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->old_format.plcp),
271 plcp_fragment_len, rate);
272 } else {
273 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->new_format.plcp),
274 plcp_fragment_len, rate);
275 }
e4d6b795
MB		 276 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
277 plcp_fragment_len, rate_fb);
278
279 /* Extra Frame Types */
280 if (rate_fb_ofdm)
eb189d8b
MB		 281 extra_ft |= B43_TXH_EFT_FB_OFDM;
282 else
283 extra_ft |= B43_TXH_EFT_FB_CCK;
e4d6b795
MB		 284
285 /* Set channel radio code. Note that the micrcode ORs 0x100 to
286 * this value before comparing it to the value in SHM, if this
287 * is a 5Ghz packet.
288 */
289 txhdr->chan_radio_code = phy->channel;
290
291 /* PHY TX Control word */
292 if (rate_ofdm)
eb189d8b
MB		 293 phy_ctl |= B43_TXH_PHY_ENC_OFDM;
294 else
295 phy_ctl |= B43_TXH_PHY_ENC_CCK;
8318d78a 296 if (txctl->flags & IEEE80211_TXCTL_SHORT_PREAMBLE)
eb189d8b 297 phy_ctl |= B43_TXH_PHY_SHORTPRMBL;
9db1f6d7
MB		 298
299 switch (b43_ieee80211_antenna_sanitize(dev, txctl->antenna_sel_tx)) {
300 case 0: /* Default */
eb189d8b 301 phy_ctl |= B43_TXH_PHY_ANT01AUTO;
e4d6b795 302 break;
9db1f6d7 303 case 1: /* Antenna 0 */
eb189d8b 304 phy_ctl |= B43_TXH_PHY_ANT0;
e4d6b795 305 break;
9db1f6d7 306 case 2: /* Antenna 1 */
eb189d8b
MB		 307 phy_ctl |= B43_TXH_PHY_ANT1;
308 break;
309 case 3: /* Antenna 2 */
310 phy_ctl |= B43_TXH_PHY_ANT2;
311 break;
312 case 4: /* Antenna 3 */
313 phy_ctl |= B43_TXH_PHY_ANT3;
e4d6b795
MB		 314 break;
315 default:
316 B43_WARN_ON(1);
317 }
318
319 /* MAC control */
320 if (!(txctl->flags & IEEE80211_TXCTL_NO_ACK))
eb189d8b 321 mac_ctl |= B43_TXH_MAC_ACK;
e4d6b795
MB		 322 if (!(((fctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
323 ((fctl & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)))
eb189d8b 324 mac_ctl |= B43_TXH_MAC_HWSEQ;
e4d6b795 325 if (txctl->flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
eb189d8b 326 mac_ctl |= B43_TXH_MAC_STMSDU;
e4d6b795 327 if (phy->type == B43_PHYTYPE_A)
eb189d8b 328 mac_ctl |= B43_TXH_MAC_5GHZ;
74cfdba7 329 if (txctl->flags & IEEE80211_TXCTL_LONG_RETRY_LIMIT)
eb189d8b 330 mac_ctl |= B43_TXH_MAC_LONGFRAME;
e4d6b795
MB		 331
332 /* Generate the RTS or CTS-to-self frame */
333 if ((txctl->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
334 (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
335 unsigned int len;
336 struct ieee80211_hdr *hdr;
337 int rts_rate, rts_rate_fb;
338 int rts_rate_ofdm, rts_rate_fb_ofdm;
eb189d8b 339 struct b43_plcp_hdr6 *plcp;
2e92e6f2 340 struct ieee80211_rate *rts_cts_rate;
e4d6b795 341
2e92e6f2
JB		 342 rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, txctl);
343
344 rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB;
e4d6b795
MB		 345 rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);
346 rts_rate_fb = b43_calc_fallback_rate(rts_rate);
347 rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);
348
349 if (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
eb189d8b
MB		 350 struct ieee80211_cts *cts;
351
352 if (b43_is_old_txhdr_format(dev)) {
353 cts = (struct ieee80211_cts *)
354 (txhdr->old_format.rts_frame);
355 } else {
356 cts = (struct ieee80211_cts *)
357 (txhdr->new_format.rts_frame);
358 }
32bfd35d 359 ieee80211_ctstoself_get(dev->wl->hw, txctl->vif,
e4d6b795 360 fragment_data, fragment_len,
eb189d8b
MB		 361 txctl, cts);
362 mac_ctl |= B43_TXH_MAC_SENDCTS;
e4d6b795
MB		 363 len = sizeof(struct ieee80211_cts);
364 } else {
eb189d8b
MB		 365 struct ieee80211_rts *rts;
366
367 if (b43_is_old_txhdr_format(dev)) {
368 rts = (struct ieee80211_rts *)
369 (txhdr->old_format.rts_frame);
370 } else {
371 rts = (struct ieee80211_rts *)
372 (txhdr->new_format.rts_frame);
373 }
32bfd35d 374 ieee80211_rts_get(dev->wl->hw, txctl->vif,
eb189d8b
MB		 375 fragment_data, fragment_len,
376 txctl, rts);
377 mac_ctl |= B43_TXH_MAC_SENDRTS;
e4d6b795
MB		 378 len = sizeof(struct ieee80211_rts);
379 }
380 len += FCS_LEN;
eb189d8b
MB		 381
382 /* Generate the PLCP headers for the RTS/CTS frame */
383 if (b43_is_old_txhdr_format(dev))
384 plcp = &txhdr->old_format.rts_plcp;
385 else
386 plcp = &txhdr->new_format.rts_plcp;
387 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
388 len, rts_rate);
389 plcp = &txhdr->rts_plcp_fb;
390 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
e4d6b795 391 len, rts_rate_fb);
eb189d8b
MB		 392
393 if (b43_is_old_txhdr_format(dev)) {
394 hdr = (struct ieee80211_hdr *)
395 (&txhdr->old_format.rts_frame);
396 } else {
397 hdr = (struct ieee80211_hdr *)
398 (&txhdr->new_format.rts_frame);
399 }
e4d6b795 400 txhdr->rts_dur_fb = hdr->duration_id;
eb189d8b 401
e4d6b795 402 if (rts_rate_ofdm) {
eb189d8b 403 extra_ft |= B43_TXH_EFT_RTS_OFDM;
e4d6b795
MB		 404 txhdr->phy_rate_rts =
405 b43_plcp_get_ratecode_ofdm(rts_rate);
eb189d8b
MB		 406 } else {
407 extra_ft |= B43_TXH_EFT_RTS_CCK;
e4d6b795
MB		 408 txhdr->phy_rate_rts =
409 b43_plcp_get_ratecode_cck(rts_rate);
eb189d8b 410 }
e4d6b795 411 if (rts_rate_fb_ofdm)
eb189d8b
MB		 412 extra_ft |= B43_TXH_EFT_RTSFB_OFDM;
413 else
414 extra_ft |= B43_TXH_EFT_RTSFB_CCK;
e4d6b795
MB		 415 }
416
417 /* Magic cookie */
eb189d8b
MB		 418 if (b43_is_old_txhdr_format(dev))
419 txhdr->old_format.cookie = cpu_to_le16(cookie);
420 else
421 txhdr->new_format.cookie = cpu_to_le16(cookie);
e4d6b795
MB		 422
423 /* Apply the bitfields */
424 txhdr->mac_ctl = cpu_to_le32(mac_ctl);
425 txhdr->phy_ctl = cpu_to_le16(phy_ctl);
426 txhdr->extra_ft = extra_ft;
e4d6b795 427
09552ccd 428 return 0;
e4d6b795
MB		 429}
430
431static s8 b43_rssi_postprocess(struct b43_wldev *dev,
432 u8 in_rssi, int ofdm,
433 int adjust_2053, int adjust_2050)
434{
435 struct b43_phy *phy = &dev->phy;
436 s32 tmp;
437
438 switch (phy->radio_ver) {
439 case 0x2050:
440 if (ofdm) {
441 tmp = in_rssi;
442 if (tmp > 127)
443 tmp -= 256;
444 tmp *= 73;
445 tmp /= 64;
446 if (adjust_2050)
447 tmp += 25;
448 else
449 tmp -= 3;
450 } else {
95de2841 451 if (dev->dev->bus->sprom.
e4d6b795
MB		 452 boardflags_lo & B43_BFL_RSSI) {
453 if (in_rssi > 63)
454 in_rssi = 63;
455 tmp = phy->nrssi_lt[in_rssi];
456 tmp = 31 - tmp;
457 tmp *= -131;
458 tmp /= 128;
459 tmp -= 57;
460 } else {
461 tmp = in_rssi;
462 tmp = 31 - tmp;
463 tmp *= -149;
464 tmp /= 128;
465 tmp -= 68;
466 }
467 if (phy->type == B43_PHYTYPE_G && adjust_2050)
468 tmp += 25;
469 }
470 break;
471 case 0x2060:
472 if (in_rssi > 127)
473 tmp = in_rssi - 256;
474 else
475 tmp = in_rssi;
476 break;
477 default:
478 tmp = in_rssi;
479 tmp -= 11;
480 tmp *= 103;
481 tmp /= 64;
482 if (adjust_2053)
483 tmp -= 109;
484 else
485 tmp -= 83;
486 }
487
488 return (s8) tmp;
489}
490
491//TODO
492#if 0
493static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi)
494{
495 struct b43_phy *phy = &dev->phy;
496 s8 ret;
497
498 if (phy->type == B43_PHYTYPE_A) {
499 //TODO: Incomplete specs.
500 ret = 0;
501 } else
502 ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1);
503
504 return ret;
505}
506#endif
507
508void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
509{
510 struct ieee80211_rx_status status;
511 struct b43_plcp_hdr6 *plcp;
512 struct ieee80211_hdr *wlhdr;
513 const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;
514 u16 fctl;
515 u16 phystat0, phystat3, chanstat, mactime;
516 u32 macstat;
517 u16 chanid;
8318d78a 518 u16 phytype;
e4d6b795
MB		 519 int padding;
520
521 memset(&status, 0, sizeof(status));
522
523 /* Get metadata about the frame from the header. */
524 phystat0 = le16_to_cpu(rxhdr->phy_status0);
525 phystat3 = le16_to_cpu(rxhdr->phy_status3);
e4d6b795
MB		 526 macstat = le32_to_cpu(rxhdr->mac_status);
527 mactime = le16_to_cpu(rxhdr->mac_time);
528 chanstat = le16_to_cpu(rxhdr->channel);
8318d78a 529 phytype = chanstat & B43_RX_CHAN_PHYTYPE;
e4d6b795
MB		 530
531 if (macstat & B43_RX_MAC_FCSERR)
532 dev->wl->ieee_stats.dot11FCSErrorCount++;
533 if (macstat & B43_RX_MAC_DECERR) {
534 /* Decryption with the given key failed.
535 * Drop the packet. We also won't be able to decrypt it with
536 * the key in software. */
537 goto drop;
538 }
539
540 /* Skip PLCP and padding */
541 padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
542 if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {
543 b43dbg(dev->wl, "RX: Packet size underrun (1)\n");
544 goto drop;
545 }
546 plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);
547 skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);
548 /* The skb contains the Wireless Header + payload data now */
549 if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) {
550 b43dbg(dev->wl, "RX: Packet size underrun (2)\n");
551 goto drop;
552 }
553 wlhdr = (struct ieee80211_hdr *)(skb->data);
554 fctl = le16_to_cpu(wlhdr->frame_control);
e4d6b795
MB		 555
556 if (macstat & B43_RX_MAC_DEC) {
557 unsigned int keyidx;
558 int wlhdr_len;
559
560 keyidx = ((macstat & B43_RX_MAC_KEYIDX)
561 >> B43_RX_MAC_KEYIDX_SHIFT);
562 /* We must adjust the key index here. We want the "physical"
563 * key index, but the ucode passed it slightly different.
564 */
565 keyidx = b43_kidx_to_raw(dev, keyidx);
566 B43_WARN_ON(keyidx >= dev->max_nr_keys);
567
568 if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
569 wlhdr_len = ieee80211_get_hdrlen(fctl);
570 if (unlikely(skb->len < (wlhdr_len + 3))) {
571 b43dbg(dev->wl,
572 "RX: Packet size underrun (3)\n");
573 goto drop;
574 }
575 status.flag |= RX_FLAG_DECRYPTED;
576 }
577 }
578
7b584163 579 /* Link quality statistics */
e4d6b795 580 status.noise = dev->stats.link_noise;
7b584163
MB		 581 if ((chanstat & B43_RX_CHAN_PHYTYPE) == B43_PHYTYPE_N) {
582// s8 rssi = max(rxhdr->power0, rxhdr->power1);
583 //TODO: Find out what the rssi value is (dBm or percentage?)
584 // and also find out what the maximum possible value is.
585 // Fill status.ssi and status.signal fields.
586 } else {
566bfe5a 587 status.signal = b43_rssi_postprocess(dev, rxhdr->jssi,
7b584163
MB		 588 (phystat0 & B43_RX_PHYST0_OFDM),
589 (phystat0 & B43_RX_PHYST0_GAINCTL),
590 (phystat3 & B43_RX_PHYST3_TRSTATE));
566bfe5a 591 status.qual = (rxhdr->jssi * 100) / B43_RX_MAX_SSI;
7b584163
MB		 592 }
593
e4d6b795 594 if (phystat0 & B43_RX_PHYST0_OFDM)
8318d78a
JB		 595 status.rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,
596 phytype == B43_PHYTYPE_A);
e4d6b795 597 else
8318d78a 598 status.rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);
e4d6b795 599 status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
c0ddd04d
JL		 600
601 /*
d007b7f4
JB		 602 * All frames on monitor interfaces and beacons always need a full
603 * 64-bit timestamp. Monitor interfaces need it for diagnostic
604 * purposes and beacons for IBSS merging.
605 * This code assumes we get to process the packet within 16 bits
606 * of timestamp, i.e. about 65 milliseconds after the PHY received
607 * the first symbol.
c0ddd04d 608 */
d007b7f4
JB		 609 if (((fctl & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
610 == (IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON)) ||
611 dev->wl->radiotap_enabled) {
c0ddd04d
JL		 612 u16 low_mactime_now;
613
614 b43_tsf_read(dev, &status.mactime);
615 low_mactime_now = status.mactime;
616 status.mactime = status.mactime & ~0xFFFFULL;
617 status.mactime += mactime;
618 if (low_mactime_now <= mactime)
619 status.mactime -= 0x10000;
620 status.flag |= RX_FLAG_TSFT;
621 }
e4d6b795
MB		 622
623 chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
624 switch (chanstat & B43_RX_CHAN_PHYTYPE) {
625 case B43_PHYTYPE_A:
8318d78a 626 status.band = IEEE80211_BAND_5GHZ;
d987160b
MB		 627 B43_WARN_ON(1);
628 /* FIXME: We don't really know which value the "chanid" contains.
629 * So the following assignment might be wrong. */
8318d78a 630 status.freq = b43_channel_to_freq_5ghz(chanid);
e4d6b795
MB		 631 break;
632 case B43_PHYTYPE_G:
8318d78a 633 status.band = IEEE80211_BAND_2GHZ;
d987160b
MB		 634 /* chanid is the radio channel cookie value as used
635 * to tune the radio. */
e4d6b795 636 status.freq = chanid + 2400;
d987160b
MB		 637 break;
638 case B43_PHYTYPE_N:
d987160b
MB		 639 /* chanid is the SHM channel cookie. Which is the plain
640 * channel number in b43. */
8318d78a
JB		 641 if (chanstat & B43_RX_CHAN_5GHZ) {
642 status.band = IEEE80211_BAND_5GHZ;
643 status.freq = b43_freq_to_channel_5ghz(chanid);
644 } else {
645 status.band = IEEE80211_BAND_2GHZ;
646 status.freq = b43_freq_to_channel_2ghz(chanid);
647 }
e4d6b795
MB		 648 break;
649 default:
650 B43_WARN_ON(1);
d987160b 651 goto drop;
e4d6b795
MB		 652 }
653
654 dev->stats.last_rx = jiffies;
655 ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
656
657 return;
658drop:
659 b43dbg(dev->wl, "RX: Packet dropped\n");
660 dev_kfree_skb_any(skb);
661}
662
663void b43_handle_txstatus(struct b43_wldev *dev,
664 const struct b43_txstatus *status)
665{
666 b43_debugfs_log_txstat(dev, status);
667
668 if (status->intermediate)
669 return;
670 if (status->for_ampdu)
671 return;
672 if (!status->acked)
673 dev->wl->ieee_stats.dot11ACKFailureCount++;
674 if (status->rts_count) {
675 if (status->rts_count == 0xF) //FIXME
676 dev->wl->ieee_stats.dot11RTSFailureCount++;
677 else
678 dev->wl->ieee_stats.dot11RTSSuccessCount++;
679 }
680
5100d5ac
MB		 681 if (b43_using_pio_transfers(dev))
682 b43_pio_handle_txstatus(dev, status);
683 else
684 b43_dma_handle_txstatus(dev, status);
e4d6b795
MB		 685}
686
5100d5ac
MB		 687/* Fill out the mac80211 TXstatus report based on the b43-specific
688 * txstatus report data. This returns a boolean whether the frame was
689 * successfully transmitted. */
690bool b43_fill_txstatus_report(struct ieee80211_tx_status *report,
691 const struct b43_txstatus *status)
e4d6b795 692{
5100d5ac
MB		 693 bool frame_success = 1;
694
695 if (status->acked) {
696 /* The frame was ACKed. */
697 report->flags |= IEEE80211_TX_STATUS_ACK;
698 } else {
699 /* The frame was not ACKed... */
700 if (!(report->control.flags & IEEE80211_TXCTL_NO_ACK)) {
701 /* ...but we expected an ACK. */
702 frame_success = 0;
703 report->excessive_retries = 1;
704 }
705 }
706 if (status->frame_count == 0) {
707 /* The frame was not transmitted at all. */
708 report->retry_count = 0;
709 } else
710 report->retry_count = status->frame_count - 1;
711
712 return frame_success;
e4d6b795
MB		 713}
714
715/* Stop any TX operation on the device (suspend the hardware queues) */
716void b43_tx_suspend(struct b43_wldev *dev)
717{
5100d5ac
MB		 718 if (b43_using_pio_transfers(dev))
719 b43_pio_tx_suspend(dev);
720 else
721 b43_dma_tx_suspend(dev);
e4d6b795
MB		 722}
723
724/* Resume any TX operation on the device (resume the hardware queues) */
725void b43_tx_resume(struct b43_wldev *dev)
726{
5100d5ac
MB		 727 if (b43_using_pio_transfers(dev))
728 b43_pio_tx_resume(dev);
729 else
730 b43_dma_tx_resume(dev);
e4d6b795 731}
Linux kernel - Deliverables
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