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wext: make sysfs bits optional and deprecate them
[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,
e039fa4a 188 const struct ieee80211_tx_info *info,
09552ccd 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;
e039fa4a 195 int use_encryption = (!(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT));
f37d9234 196 __le16 fctl = 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
e039fa4a 208 txrate = ieee80211_get_tx_rate(dev->wl->hw, info);
2e92e6f2 209 rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;
e4d6b795 210 rate_ofdm = b43_is_ofdm_rate(rate);
e039fa4a 211 fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : 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 {
e039fa4a
JB		 231 txhdr->dur_fb = ieee80211_generic_frame_duration(
232 dev->wl->hw, info->control.vif, fragment_len, fbrate);
e4d6b795
MB		 233 }
234
235 plcp_fragment_len = fragment_len + FCS_LEN;
236 if (use_encryption) {
e039fa4a 237 u8 key_idx = info->control.hw_key->hw_key_idx;
e4d6b795
MB		 238 struct b43_key *key;
239 int wlhdr_len;
240 size_t iv_len;
241
242 B43_WARN_ON(key_idx >= dev->max_nr_keys);
243 key = &(dev->key[key_idx]);
7be1bb6b 244
09552ccd
MB		 245 if (unlikely(!key->keyconf)) {
246 /* This key is invalid. This might only happen
247 * in a short timeframe after machine resume before
248 * we were able to reconfigure keys.
249 * Drop this packet completely. Do not transmit it
250 * unencrypted to avoid leaking information. */
251 return -ENOKEY;
7be1bb6b 252 }
09552ccd
MB		 253
254 /* Hardware appends ICV. */
e039fa4a 255 plcp_fragment_len += info->control.icv_len;
09552ccd
MB		 256
257 key_idx = b43_kidx_to_fw(dev, key_idx);
258 mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
259 B43_TXH_MAC_KEYIDX;
260 mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
261 B43_TXH_MAC_KEYALG;
f37d9234 262 wlhdr_len = ieee80211_hdrlen(fctl);
e039fa4a 263 iv_len = min((size_t) info->control.iv_len,
09552ccd
MB		 264 ARRAY_SIZE(txhdr->iv));
265 memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
e4d6b795 266 }
eb189d8b
MB		 267 if (b43_is_old_txhdr_format(dev)) {
268 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->old_format.plcp),
269 plcp_fragment_len, rate);
270 } else {
271 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->new_format.plcp),
272 plcp_fragment_len, rate);
273 }
e4d6b795
MB		 274 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
275 plcp_fragment_len, rate_fb);
276
277 /* Extra Frame Types */
278 if (rate_fb_ofdm)
eb189d8b
MB		 279 extra_ft |= B43_TXH_EFT_FB_OFDM;
280 else
281 extra_ft |= B43_TXH_EFT_FB_CCK;
e4d6b795
MB		 282
283 /* Set channel radio code. Note that the micrcode ORs 0x100 to
284 * this value before comparing it to the value in SHM, if this
285 * is a 5Ghz packet.
286 */
287 txhdr->chan_radio_code = phy->channel;
288
289 /* PHY TX Control word */
290 if (rate_ofdm)
eb189d8b
MB		 291 phy_ctl |= B43_TXH_PHY_ENC_OFDM;
292 else
293 phy_ctl |= B43_TXH_PHY_ENC_CCK;
e039fa4a 294 if (info->flags & IEEE80211_TX_CTL_SHORT_PREAMBLE)
eb189d8b 295 phy_ctl |= B43_TXH_PHY_SHORTPRMBL;
9db1f6d7 296
e039fa4a 297 switch (b43_ieee80211_antenna_sanitize(dev, info->antenna_sel_tx)) {
9db1f6d7 298 case 0: /* Default */
eb189d8b 299 phy_ctl |= B43_TXH_PHY_ANT01AUTO;
e4d6b795 300 break;
9db1f6d7 301 case 1: /* Antenna 0 */
eb189d8b 302 phy_ctl |= B43_TXH_PHY_ANT0;
e4d6b795 303 break;
9db1f6d7 304 case 2: /* Antenna 1 */
eb189d8b
MB		 305 phy_ctl |= B43_TXH_PHY_ANT1;
306 break;
307 case 3: /* Antenna 2 */
308 phy_ctl |= B43_TXH_PHY_ANT2;
309 break;
310 case 4: /* Antenna 3 */
311 phy_ctl |= B43_TXH_PHY_ANT3;
e4d6b795
MB		 312 break;
313 default:
314 B43_WARN_ON(1);
315 }
316
317 /* MAC control */
e039fa4a 318 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
eb189d8b 319 mac_ctl |= B43_TXH_MAC_ACK;
f37d9234 320 if (!ieee80211_is_pspoll(fctl))
eb189d8b 321 mac_ctl |= B43_TXH_MAC_HWSEQ;
e039fa4a 322 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
eb189d8b 323 mac_ctl |= B43_TXH_MAC_STMSDU;
e4d6b795 324 if (phy->type == B43_PHYTYPE_A)
eb189d8b 325 mac_ctl |= B43_TXH_MAC_5GHZ;
e039fa4a 326 if (info->flags & IEEE80211_TX_CTL_LONG_RETRY_LIMIT)
eb189d8b 327 mac_ctl |= B43_TXH_MAC_LONGFRAME;
e4d6b795
MB		 328
329 /* Generate the RTS or CTS-to-self frame */
e039fa4a
JB		 330 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) ||
331 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) {
e4d6b795
MB		 332 unsigned int len;
333 struct ieee80211_hdr *hdr;
334 int rts_rate, rts_rate_fb;
335 int rts_rate_ofdm, rts_rate_fb_ofdm;
eb189d8b 336 struct b43_plcp_hdr6 *plcp;
2e92e6f2 337 struct ieee80211_rate *rts_cts_rate;
e4d6b795 338
e039fa4a 339 rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info);
2e92e6f2
JB		 340
341 rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB;
e4d6b795
MB		 342 rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);
343 rts_rate_fb = b43_calc_fallback_rate(rts_rate);
344 rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);
345
e039fa4a 346 if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
eb189d8b
MB		 347 struct ieee80211_cts *cts;
348
349 if (b43_is_old_txhdr_format(dev)) {
350 cts = (struct ieee80211_cts *)
351 (txhdr->old_format.rts_frame);
352 } else {
353 cts = (struct ieee80211_cts *)
354 (txhdr->new_format.rts_frame);
355 }
e039fa4a 356 ieee80211_ctstoself_get(dev->wl->hw, info->control.vif,
e4d6b795 357 fragment_data, fragment_len,
e039fa4a 358 info, cts);
eb189d8b 359 mac_ctl |= B43_TXH_MAC_SENDCTS;
e4d6b795
MB		 360 len = sizeof(struct ieee80211_cts);
361 } else {
eb189d8b
MB		 362 struct ieee80211_rts *rts;
363
364 if (b43_is_old_txhdr_format(dev)) {
365 rts = (struct ieee80211_rts *)
366 (txhdr->old_format.rts_frame);
367 } else {
368 rts = (struct ieee80211_rts *)
369 (txhdr->new_format.rts_frame);
370 }
e039fa4a 371 ieee80211_rts_get(dev->wl->hw, info->control.vif,
eb189d8b 372 fragment_data, fragment_len,
e039fa4a 373 info, rts);
eb189d8b 374 mac_ctl |= B43_TXH_MAC_SENDRTS;
e4d6b795
MB		 375 len = sizeof(struct ieee80211_rts);
376 }
377 len += FCS_LEN;
eb189d8b
MB		 378
379 /* Generate the PLCP headers for the RTS/CTS frame */
380 if (b43_is_old_txhdr_format(dev))
381 plcp = &txhdr->old_format.rts_plcp;
382 else
383 plcp = &txhdr->new_format.rts_plcp;
384 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
385 len, rts_rate);
386 plcp = &txhdr->rts_plcp_fb;
387 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
e4d6b795 388 len, rts_rate_fb);
eb189d8b
MB		 389
390 if (b43_is_old_txhdr_format(dev)) {
391 hdr = (struct ieee80211_hdr *)
392 (&txhdr->old_format.rts_frame);
393 } else {
394 hdr = (struct ieee80211_hdr *)
395 (&txhdr->new_format.rts_frame);
396 }
e4d6b795 397 txhdr->rts_dur_fb = hdr->duration_id;
eb189d8b 398
e4d6b795 399 if (rts_rate_ofdm) {
eb189d8b 400 extra_ft |= B43_TXH_EFT_RTS_OFDM;
e4d6b795
MB		 401 txhdr->phy_rate_rts =
402 b43_plcp_get_ratecode_ofdm(rts_rate);
eb189d8b
MB		 403 } else {
404 extra_ft |= B43_TXH_EFT_RTS_CCK;
e4d6b795
MB		 405 txhdr->phy_rate_rts =
406 b43_plcp_get_ratecode_cck(rts_rate);
eb189d8b 407 }
e4d6b795 408 if (rts_rate_fb_ofdm)
eb189d8b
MB		 409 extra_ft |= B43_TXH_EFT_RTSFB_OFDM;
410 else
411 extra_ft |= B43_TXH_EFT_RTSFB_CCK;
e4d6b795
MB		 412 }
413
414 /* Magic cookie */
eb189d8b
MB		 415 if (b43_is_old_txhdr_format(dev))
416 txhdr->old_format.cookie = cpu_to_le16(cookie);
417 else
418 txhdr->new_format.cookie = cpu_to_le16(cookie);
e4d6b795
MB		 419
420 /* Apply the bitfields */
421 txhdr->mac_ctl = cpu_to_le32(mac_ctl);
422 txhdr->phy_ctl = cpu_to_le16(phy_ctl);
423 txhdr->extra_ft = extra_ft;
e4d6b795 424
09552ccd 425 return 0;
e4d6b795
MB		 426}
427
428static s8 b43_rssi_postprocess(struct b43_wldev *dev,
429 u8 in_rssi, int ofdm,
430 int adjust_2053, int adjust_2050)
431{
432 struct b43_phy *phy = &dev->phy;
433 s32 tmp;
434
435 switch (phy->radio_ver) {
436 case 0x2050:
437 if (ofdm) {
438 tmp = in_rssi;
439 if (tmp > 127)
440 tmp -= 256;
441 tmp *= 73;
442 tmp /= 64;
443 if (adjust_2050)
444 tmp += 25;
445 else
446 tmp -= 3;
447 } else {
95de2841 448 if (dev->dev->bus->sprom.
e4d6b795
MB		 449 boardflags_lo & B43_BFL_RSSI) {
450 if (in_rssi > 63)
451 in_rssi = 63;
452 tmp = phy->nrssi_lt[in_rssi];
453 tmp = 31 - tmp;
454 tmp *= -131;
455 tmp /= 128;
456 tmp -= 57;
457 } else {
458 tmp = in_rssi;
459 tmp = 31 - tmp;
460 tmp *= -149;
461 tmp /= 128;
462 tmp -= 68;
463 }
464 if (phy->type == B43_PHYTYPE_G && adjust_2050)
465 tmp += 25;
466 }
467 break;
468 case 0x2060:
469 if (in_rssi > 127)
470 tmp = in_rssi - 256;
471 else
472 tmp = in_rssi;
473 break;
474 default:
475 tmp = in_rssi;
476 tmp -= 11;
477 tmp *= 103;
478 tmp /= 64;
479 if (adjust_2053)
480 tmp -= 109;
481 else
482 tmp -= 83;
483 }
484
485 return (s8) tmp;
486}
487
488//TODO
489#if 0
490static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi)
491{
492 struct b43_phy *phy = &dev->phy;
493 s8 ret;
494
495 if (phy->type == B43_PHYTYPE_A) {
496 //TODO: Incomplete specs.
497 ret = 0;
498 } else
499 ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1);
500
501 return ret;
502}
503#endif
504
505void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
506{
507 struct ieee80211_rx_status status;
508 struct b43_plcp_hdr6 *plcp;
509 struct ieee80211_hdr *wlhdr;
510 const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;
f37d9234 511 __le16 fctl;
e4d6b795
MB		 512 u16 phystat0, phystat3, chanstat, mactime;
513 u32 macstat;
514 u16 chanid;
8318d78a 515 u16 phytype;
e4d6b795
MB		 516 int padding;
517
518 memset(&status, 0, sizeof(status));
519
520 /* Get metadata about the frame from the header. */
521 phystat0 = le16_to_cpu(rxhdr->phy_status0);
522 phystat3 = le16_to_cpu(rxhdr->phy_status3);
e4d6b795
MB		 523 macstat = le32_to_cpu(rxhdr->mac_status);
524 mactime = le16_to_cpu(rxhdr->mac_time);
525 chanstat = le16_to_cpu(rxhdr->channel);
8318d78a 526 phytype = chanstat & B43_RX_CHAN_PHYTYPE;
e4d6b795
MB		 527
528 if (macstat & B43_RX_MAC_FCSERR)
529 dev->wl->ieee_stats.dot11FCSErrorCount++;
530 if (macstat & B43_RX_MAC_DECERR) {
531 /* Decryption with the given key failed.
532 * Drop the packet. We also won't be able to decrypt it with
533 * the key in software. */
534 goto drop;
535 }
536
537 /* Skip PLCP and padding */
538 padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
539 if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {
540 b43dbg(dev->wl, "RX: Packet size underrun (1)\n");
541 goto drop;
542 }
543 plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);
544 skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);
545 /* The skb contains the Wireless Header + payload data now */
546 if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) {
547 b43dbg(dev->wl, "RX: Packet size underrun (2)\n");
548 goto drop;
549 }
550 wlhdr = (struct ieee80211_hdr *)(skb->data);
f37d9234 551 fctl = wlhdr->frame_control;
e4d6b795
MB		 552
553 if (macstat & B43_RX_MAC_DEC) {
554 unsigned int keyidx;
555 int wlhdr_len;
556
557 keyidx = ((macstat & B43_RX_MAC_KEYIDX)
558 >> B43_RX_MAC_KEYIDX_SHIFT);
559 /* We must adjust the key index here. We want the "physical"
560 * key index, but the ucode passed it slightly different.
561 */
562 keyidx = b43_kidx_to_raw(dev, keyidx);
563 B43_WARN_ON(keyidx >= dev->max_nr_keys);
564
565 if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
f37d9234 566 wlhdr_len = ieee80211_hdrlen(fctl);
e4d6b795
MB		 567 if (unlikely(skb->len < (wlhdr_len + 3))) {
568 b43dbg(dev->wl,
569 "RX: Packet size underrun (3)\n");
570 goto drop;
571 }
572 status.flag |= RX_FLAG_DECRYPTED;
573 }
574 }
575
7b584163 576 /* Link quality statistics */
e4d6b795 577 status.noise = dev->stats.link_noise;
7b584163
MB		 578 if ((chanstat & B43_RX_CHAN_PHYTYPE) == B43_PHYTYPE_N) {
579// s8 rssi = max(rxhdr->power0, rxhdr->power1);
580 //TODO: Find out what the rssi value is (dBm or percentage?)
581 // and also find out what the maximum possible value is.
582 // Fill status.ssi and status.signal fields.
583 } else {
566bfe5a 584 status.signal = b43_rssi_postprocess(dev, rxhdr->jssi,
7b584163
MB		 585 (phystat0 & B43_RX_PHYST0_OFDM),
586 (phystat0 & B43_RX_PHYST0_GAINCTL),
587 (phystat3 & B43_RX_PHYST3_TRSTATE));
566bfe5a 588 status.qual = (rxhdr->jssi * 100) / B43_RX_MAX_SSI;
7b584163
MB		 589 }
590
e4d6b795 591 if (phystat0 & B43_RX_PHYST0_OFDM)
8318d78a
JB		 592 status.rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,
593 phytype == B43_PHYTYPE_A);
e4d6b795 594 else
8318d78a 595 status.rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);
e4d6b795 596 status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
c0ddd04d
JL		 597
598 /*
d007b7f4
JB		 599 * All frames on monitor interfaces and beacons always need a full
600 * 64-bit timestamp. Monitor interfaces need it for diagnostic
601 * purposes and beacons for IBSS merging.
602 * This code assumes we get to process the packet within 16 bits
603 * of timestamp, i.e. about 65 milliseconds after the PHY received
604 * the first symbol.
c0ddd04d 605 */
f37d9234 606 if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
c0ddd04d
JL		 607 u16 low_mactime_now;
608
609 b43_tsf_read(dev, &status.mactime);
610 low_mactime_now = status.mactime;
611 status.mactime = status.mactime & ~0xFFFFULL;
612 status.mactime += mactime;
613 if (low_mactime_now <= mactime)
614 status.mactime -= 0x10000;
615 status.flag |= RX_FLAG_TSFT;
616 }
e4d6b795
MB		 617
618 chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
619 switch (chanstat & B43_RX_CHAN_PHYTYPE) {
620 case B43_PHYTYPE_A:
8318d78a 621 status.band = IEEE80211_BAND_5GHZ;
d987160b
MB		 622 B43_WARN_ON(1);
623 /* FIXME: We don't really know which value the "chanid" contains.
624 * So the following assignment might be wrong. */
8318d78a 625 status.freq = b43_channel_to_freq_5ghz(chanid);
e4d6b795
MB		 626 break;
627 case B43_PHYTYPE_G:
8318d78a 628 status.band = IEEE80211_BAND_2GHZ;
d987160b
MB		 629 /* chanid is the radio channel cookie value as used
630 * to tune the radio. */
e4d6b795 631 status.freq = chanid + 2400;
d987160b
MB		 632 break;
633 case B43_PHYTYPE_N:
d987160b
MB		 634 /* chanid is the SHM channel cookie. Which is the plain
635 * channel number in b43. */
8318d78a
JB		 636 if (chanstat & B43_RX_CHAN_5GHZ) {
637 status.band = IEEE80211_BAND_5GHZ;
638 status.freq = b43_freq_to_channel_5ghz(chanid);
639 } else {
640 status.band = IEEE80211_BAND_2GHZ;
641 status.freq = b43_freq_to_channel_2ghz(chanid);
642 }
e4d6b795
MB		 643 break;
644 default:
645 B43_WARN_ON(1);
d987160b 646 goto drop;
e4d6b795
MB		 647 }
648
649 dev->stats.last_rx = jiffies;
650 ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
651
652 return;
653drop:
654 b43dbg(dev->wl, "RX: Packet dropped\n");
655 dev_kfree_skb_any(skb);
656}
657
658void b43_handle_txstatus(struct b43_wldev *dev,
659 const struct b43_txstatus *status)
660{
661 b43_debugfs_log_txstat(dev, status);
662
663 if (status->intermediate)
664 return;
665 if (status->for_ampdu)
666 return;
667 if (!status->acked)
668 dev->wl->ieee_stats.dot11ACKFailureCount++;
669 if (status->rts_count) {
670 if (status->rts_count == 0xF) //FIXME
671 dev->wl->ieee_stats.dot11RTSFailureCount++;
672 else
673 dev->wl->ieee_stats.dot11RTSSuccessCount++;
674 }
675
5100d5ac
MB		 676 if (b43_using_pio_transfers(dev))
677 b43_pio_handle_txstatus(dev, status);
678 else
679 b43_dma_handle_txstatus(dev, status);
e4d6b795
MB		 680}
681
5100d5ac
MB		 682/* Fill out the mac80211 TXstatus report based on the b43-specific
683 * txstatus report data. This returns a boolean whether the frame was
684 * successfully transmitted. */
e039fa4a 685bool b43_fill_txstatus_report(struct ieee80211_tx_info *report,
5100d5ac 686 const struct b43_txstatus *status)
e4d6b795 687{
5100d5ac
MB		 688 bool frame_success = 1;
689
690 if (status->acked) {
691 /* The frame was ACKed. */
e039fa4a 692 report->flags |= IEEE80211_TX_STAT_ACK;
5100d5ac
MB		 693 } else {
694 /* The frame was not ACKed... */
e039fa4a 695 if (!(report->flags & IEEE80211_TX_CTL_NO_ACK)) {
5100d5ac
MB		 696 /* ...but we expected an ACK. */
697 frame_success = 0;
e039fa4a 698 report->status.excessive_retries = 1;
5100d5ac
MB		 699 }
700 }
701 if (status->frame_count == 0) {
702 /* The frame was not transmitted at all. */
e039fa4a 703 report->status.retry_count = 0;
5100d5ac 704 } else
e039fa4a 705 report->status.retry_count = status->frame_count - 1;
5100d5ac
MB		 706
707 return frame_success;
e4d6b795
MB		 708}
709
710/* Stop any TX operation on the device (suspend the hardware queues) */
711void b43_tx_suspend(struct b43_wldev *dev)
712{
5100d5ac
MB		 713 if (b43_using_pio_transfers(dev))
714 b43_pio_tx_suspend(dev);
715 else
716 b43_dma_tx_suspend(dev);
e4d6b795
MB		 717}
718
719/* Resume any TX operation on the device (resume the hardware queues) */
720void b43_tx_resume(struct b43_wldev *dev)
721{
5100d5ac
MB		 722 if (b43_using_pio_transfers(dev))
723 b43_pio_tx_resume(dev);
724 else
725 b43_dma_tx_resume(dev);
e4d6b795 726}
Linux kernel - Deliverables
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