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mm/zsmalloc: allocate exactly size of struct zs_pool
[linux/fpc-iii.git] / drivers / net / wireless / b43 / xmit.c
blob426dc13c44cd6dff0504151e52b59bcdb87f06a0
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>
8 Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
9 Copyright (C) 2005, 2006 Michael Buesch <m@bues.ch>
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_common.h"
32 #include "dma.h"
33 #include "pio.h"
34
35 static const struct b43_tx_legacy_rate_phy_ctl_entry b43_tx_legacy_rate_phy_ctl[] = {
36 { B43_CCK_RATE_1MB, 0x0, 0x0 },
37 { B43_CCK_RATE_2MB, 0x0, 0x1 },
38 { B43_CCK_RATE_5MB, 0x0, 0x2 },
39 { B43_CCK_RATE_11MB, 0x0, 0x3 },
40 { B43_OFDM_RATE_6MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_BPSK },
41 { B43_OFDM_RATE_9MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_BPSK },
42 { B43_OFDM_RATE_12MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QPSK },
43 { B43_OFDM_RATE_18MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QPSK },
44 { B43_OFDM_RATE_24MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QAM16 },
45 { B43_OFDM_RATE_36MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM16 },
46 { B43_OFDM_RATE_48MB, B43_TXH_PHY1_CRATE_2_3, B43_TXH_PHY1_MODUL_QAM64 },
47 { B43_OFDM_RATE_54MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM64 },
48 };
49
50 static const struct b43_tx_legacy_rate_phy_ctl_entry *
51 b43_tx_legacy_rate_phy_ctl_ent(u8 bitrate)
52 {
53 const struct b43_tx_legacy_rate_phy_ctl_entry *e;
54 unsigned int i;
55
56 for (i = 0; i < ARRAY_SIZE(b43_tx_legacy_rate_phy_ctl); i++) {
57 e = &(b43_tx_legacy_rate_phy_ctl[i]);
58 if (e->bitrate == bitrate)
59 return e;
60 }
61
62 B43_WARN_ON(1);
63 return NULL;
64 }
65
66 /* Extract the bitrate index out of a CCK PLCP header. */
67 static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp)
68 {
69 switch (plcp->raw[0]) {
70 case 0x0A:
71 return 0;
72 case 0x14:
73 return 1;
74 case 0x37:
75 return 2;
76 case 0x6E:
77 return 3;
78 }
79 return -1;
80 }
81
82 /* Extract the bitrate index out of an OFDM PLCP header. */
83 static int b43_plcp_get_bitrate_idx_ofdm(struct b43_plcp_hdr6 *plcp, bool ghz5)
84 {
85 /* For 2 GHz band first OFDM rate is at index 4, see main.c */
86 int base = ghz5 ? 0 : 4;
87
88 switch (plcp->raw[0] & 0xF) {
89 case 0xB:
90 return base + 0;
91 case 0xF:
92 return base + 1;
93 case 0xA:
94 return base + 2;
95 case 0xE:
96 return base + 3;
97 case 0x9:
98 return base + 4;
99 case 0xD:
100 return base + 5;
101 case 0x8:
102 return base + 6;
103 case 0xC:
104 return base + 7;
105 }
106 return -1;
107 }
108
109 u8 b43_plcp_get_ratecode_cck(const u8 bitrate)
110 {
111 switch (bitrate) {
112 case B43_CCK_RATE_1MB:
113 return 0x0A;
114 case B43_CCK_RATE_2MB:
115 return 0x14;
116 case B43_CCK_RATE_5MB:
117 return 0x37;
118 case B43_CCK_RATE_11MB:
119 return 0x6E;
120 }
121 B43_WARN_ON(1);
122 return 0;
123 }
124
125 u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)
126 {
127 switch (bitrate) {
128 case B43_OFDM_RATE_6MB:
129 return 0xB;
130 case B43_OFDM_RATE_9MB:
131 return 0xF;
132 case B43_OFDM_RATE_12MB:
133 return 0xA;
134 case B43_OFDM_RATE_18MB:
135 return 0xE;
136 case B43_OFDM_RATE_24MB:
137 return 0x9;
138 case B43_OFDM_RATE_36MB:
139 return 0xD;
140 case B43_OFDM_RATE_48MB:
141 return 0x8;
142 case B43_OFDM_RATE_54MB:
143 return 0xC;
144 }
145 B43_WARN_ON(1);
146 return 0;
147 }
148
149 void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
150 const u16 octets, const u8 bitrate)
151 {
152 __u8 *raw = plcp->raw;
153
154 if (b43_is_ofdm_rate(bitrate)) {
155 u32 d;
156
157 d = b43_plcp_get_ratecode_ofdm(bitrate);
158 B43_WARN_ON(octets & 0xF000);
159 d |= (octets << 5);
160 plcp->data = cpu_to_le32(d);
161 } else {
162 u32 plen;
163
164 plen = octets * 16 / bitrate;
165 if ((octets * 16 % bitrate) > 0) {
166 plen++;
167 if ((bitrate == B43_CCK_RATE_11MB)
168 && ((octets * 8 % 11) < 4)) {
169 raw[1] = 0x84;
170 } else
171 raw[1] = 0x04;
172 } else
173 raw[1] = 0x04;
174 plcp->data |= cpu_to_le32(plen << 16);
175 raw[0] = b43_plcp_get_ratecode_cck(bitrate);
176 }
177 }
178
179 /* TODO: verify if needed for SSLPN or LCN */
180 static u16 b43_generate_tx_phy_ctl1(struct b43_wldev *dev, u8 bitrate)
181 {
182 const struct b43_phy *phy = &dev->phy;
183 const struct b43_tx_legacy_rate_phy_ctl_entry *e;
184 u16 control = 0;
185 u16 bw;
186
187 if (phy->type == B43_PHYTYPE_LP)
188 bw = B43_TXH_PHY1_BW_20;
189 else /* FIXME */
190 bw = B43_TXH_PHY1_BW_20;
191
192 if (0) { /* FIXME: MIMO */
193 } else if (b43_is_cck_rate(bitrate) && phy->type != B43_PHYTYPE_LP) {
194 control = bw;
195 } else {
196 control = bw;
197 e = b43_tx_legacy_rate_phy_ctl_ent(bitrate);
198 if (e) {
199 control |= e->coding_rate;
200 control |= e->modulation;
201 }
202 control |= B43_TXH_PHY1_MODE_SISO;
203 }
204
205 return control;
206 }
207
208 static u8 b43_calc_fallback_rate(u8 bitrate)
209 {
210 switch (bitrate) {
211 case B43_CCK_RATE_1MB:
212 return B43_CCK_RATE_1MB;
213 case B43_CCK_RATE_2MB:
214 return B43_CCK_RATE_1MB;
215 case B43_CCK_RATE_5MB:
216 return B43_CCK_RATE_2MB;
217 case B43_CCK_RATE_11MB:
218 return B43_CCK_RATE_5MB;
219 case B43_OFDM_RATE_6MB:
220 return B43_CCK_RATE_5MB;
221 case B43_OFDM_RATE_9MB:
222 return B43_OFDM_RATE_6MB;
223 case B43_OFDM_RATE_12MB:
224 return B43_OFDM_RATE_9MB;
225 case B43_OFDM_RATE_18MB:
226 return B43_OFDM_RATE_12MB;
227 case B43_OFDM_RATE_24MB:
228 return B43_OFDM_RATE_18MB;
229 case B43_OFDM_RATE_36MB:
230 return B43_OFDM_RATE_24MB;
231 case B43_OFDM_RATE_48MB:
232 return B43_OFDM_RATE_36MB;
233 case B43_OFDM_RATE_54MB:
234 return B43_OFDM_RATE_48MB;
235 }
236 B43_WARN_ON(1);
237 return 0;
238 }
239
240 /* Generate a TX data header. */
241 int b43_generate_txhdr(struct b43_wldev *dev,
242 u8 *_txhdr,
243 struct sk_buff *skb_frag,
244 struct ieee80211_tx_info *info,
245 u16 cookie)
246 {
247 const unsigned char *fragment_data = skb_frag->data;
248 unsigned int fragment_len = skb_frag->len;
249 struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr;
250 const struct b43_phy *phy = &dev->phy;
251 const struct ieee80211_hdr *wlhdr =
252 (const struct ieee80211_hdr *)fragment_data;
253 int use_encryption = !!info->control.hw_key;
254 __le16 fctl = wlhdr->frame_control;
255 struct ieee80211_rate *fbrate;
256 u8 rate, rate_fb;
257 int rate_ofdm, rate_fb_ofdm;
258 unsigned int plcp_fragment_len;
259 u32 mac_ctl = 0;
260 u16 phy_ctl = 0;
261 bool fill_phy_ctl1 = (phy->type == B43_PHYTYPE_LP ||
262 phy->type == B43_PHYTYPE_N ||
263 phy->type == B43_PHYTYPE_HT);
264 u8 extra_ft = 0;
265 struct ieee80211_rate *txrate;
266 struct ieee80211_tx_rate *rates;
267
268 memset(txhdr, 0, sizeof(*txhdr));
269
270 txrate = ieee80211_get_tx_rate(dev->wl->hw, info);
271 rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;
272 rate_ofdm = b43_is_ofdm_rate(rate);
273 fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate;
274 rate_fb = fbrate->hw_value;
275 rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
276
277 if (rate_ofdm)
278 txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate);
279 else
280 txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate);
281 txhdr->mac_frame_ctl = wlhdr->frame_control;
282 memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN);
283
284 /* Calculate duration for fallback rate */
285 if ((rate_fb == rate) ||
286 (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
287 (wlhdr->duration_id == cpu_to_le16(0))) {
288 /* If the fallback rate equals the normal rate or the
289 * dur_id field contains an AID, CFP magic or 0,
290 * use the original dur_id field. */
291 txhdr->dur_fb = wlhdr->duration_id;
292 } else {
293 txhdr->dur_fb = ieee80211_generic_frame_duration(
294 dev->wl->hw, info->control.vif, info->band,
295 fragment_len, fbrate);
296 }
297
298 plcp_fragment_len = fragment_len + FCS_LEN;
299 if (use_encryption) {
300 u8 key_idx = info->control.hw_key->hw_key_idx;
301 struct b43_key *key;
302 int wlhdr_len;
303 size_t iv_len;
304
305 B43_WARN_ON(key_idx >= ARRAY_SIZE(dev->key));
306 key = &(dev->key[key_idx]);
307
308 if (unlikely(!key->keyconf)) {
309 /* This key is invalid. This might only happen
310 * in a short timeframe after machine resume before
311 * we were able to reconfigure keys.
312 * Drop this packet completely. Do not transmit it
313 * unencrypted to avoid leaking information. */
314 return -ENOKEY;
315 }
316
317 /* Hardware appends ICV. */
318 plcp_fragment_len += info->control.hw_key->icv_len;
319
320 key_idx = b43_kidx_to_fw(dev, key_idx);
321 mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
322 B43_TXH_MAC_KEYIDX;
323 mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
324 B43_TXH_MAC_KEYALG;
325 wlhdr_len = ieee80211_hdrlen(fctl);
326 if (key->algorithm == B43_SEC_ALGO_TKIP) {
327 u16 phase1key[5];
328 int i;
329 /* we give the phase1key and iv16 here, the key is stored in
330 * shm. With that the hardware can do phase 2 and encryption.
331 */
332 ieee80211_get_tkip_p1k(info->control.hw_key, skb_frag, phase1key);
333 /* phase1key is in host endian. Copy to little-endian txhdr->iv. */
334 for (i = 0; i < 5; i++) {
335 txhdr->iv[i * 2 + 0] = phase1key[i];
336 txhdr->iv[i * 2 + 1] = phase1key[i] >> 8;
337 }
338 /* iv16 */
339 memcpy(txhdr->iv + 10, ((u8 *) wlhdr) + wlhdr_len, 3);
340 } else {
341 iv_len = min_t(size_t, info->control.hw_key->iv_len,
342 ARRAY_SIZE(txhdr->iv));
343 memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
344 }
345 }
346 switch (dev->fw.hdr_format) {
347 case B43_FW_HDR_598:
348 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_598.plcp),
349 plcp_fragment_len, rate);
350 break;
351 case B43_FW_HDR_351:
352 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_351.plcp),
353 plcp_fragment_len, rate);
354 break;
355 case B43_FW_HDR_410:
356 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_410.plcp),
357 plcp_fragment_len, rate);
358 break;
359 }
360 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
361 plcp_fragment_len, rate_fb);
362
363 /* Extra Frame Types */
364 if (rate_fb_ofdm)
365 extra_ft |= B43_TXH_EFT_FB_OFDM;
366 else
367 extra_ft |= B43_TXH_EFT_FB_CCK;
368
369 /* Set channel radio code. Note that the micrcode ORs 0x100 to
370 * this value before comparing it to the value in SHM, if this
371 * is a 5Ghz packet.
372 */
373 txhdr->chan_radio_code = phy->channel;
374
375 /* PHY TX Control word */
376 if (rate_ofdm)
377 phy_ctl |= B43_TXH_PHY_ENC_OFDM;
378 else
379 phy_ctl |= B43_TXH_PHY_ENC_CCK;
380 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
381 phy_ctl |= B43_TXH_PHY_SHORTPRMBL;
382
383 switch (b43_ieee80211_antenna_sanitize(dev, 0)) {
384 case 0: /* Default */
385 phy_ctl |= B43_TXH_PHY_ANT01AUTO;
386 break;
387 case 1: /* Antenna 0 */
388 phy_ctl |= B43_TXH_PHY_ANT0;
389 break;
390 case 2: /* Antenna 1 */
391 phy_ctl |= B43_TXH_PHY_ANT1;
392 break;
393 case 3: /* Antenna 2 */
394 phy_ctl |= B43_TXH_PHY_ANT2;
395 break;
396 case 4: /* Antenna 3 */
397 phy_ctl |= B43_TXH_PHY_ANT3;
398 break;
399 default:
400 B43_WARN_ON(1);
401 }
402
403 rates = info->control.rates;
404 /* MAC control */
405 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
406 mac_ctl |= B43_TXH_MAC_ACK;
407 /* use hardware sequence counter as the non-TID counter */
408 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
409 mac_ctl |= B43_TXH_MAC_HWSEQ;
410 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
411 mac_ctl |= B43_TXH_MAC_STMSDU;
412 if (!phy->gmode)
413 mac_ctl |= B43_TXH_MAC_5GHZ;
414
415 /* Overwrite rates[0].count to make the retry calculation
416 * in the tx status easier. need the actual retry limit to
417 * detect whether the fallback rate was used.
418 */
419 if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
420 (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
421 rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
422 mac_ctl |= B43_TXH_MAC_LONGFRAME;
423 } else {
424 rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
425 }
426
427 /* Generate the RTS or CTS-to-self frame */
428 if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
429 (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
430 unsigned int len;
431 struct ieee80211_hdr *uninitialized_var(hdr);
432 int rts_rate, rts_rate_fb;
433 int rts_rate_ofdm, rts_rate_fb_ofdm;
434 struct b43_plcp_hdr6 *uninitialized_var(plcp);
435 struct ieee80211_rate *rts_cts_rate;
436
437 rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info);
438
439 rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB;
440 rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);
441 rts_rate_fb = b43_calc_fallback_rate(rts_rate);
442 rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);
443
444 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
445 struct ieee80211_cts *uninitialized_var(cts);
446
447 switch (dev->fw.hdr_format) {
448 case B43_FW_HDR_598:
449 cts = (struct ieee80211_cts *)
450 (txhdr->format_598.rts_frame);
451 break;
452 case B43_FW_HDR_351:
453 cts = (struct ieee80211_cts *)
454 (txhdr->format_351.rts_frame);
455 break;
456 case B43_FW_HDR_410:
457 cts = (struct ieee80211_cts *)
458 (txhdr->format_410.rts_frame);
459 break;
460 }
461 ieee80211_ctstoself_get(dev->wl->hw, info->control.vif,
462 fragment_data, fragment_len,
463 info, cts);
464 mac_ctl |= B43_TXH_MAC_SENDCTS;
465 len = sizeof(struct ieee80211_cts);
466 } else {
467 struct ieee80211_rts *uninitialized_var(rts);
468
469 switch (dev->fw.hdr_format) {
470 case B43_FW_HDR_598:
471 rts = (struct ieee80211_rts *)
472 (txhdr->format_598.rts_frame);
473 break;
474 case B43_FW_HDR_351:
475 rts = (struct ieee80211_rts *)
476 (txhdr->format_351.rts_frame);
477 break;
478 case B43_FW_HDR_410:
479 rts = (struct ieee80211_rts *)
480 (txhdr->format_410.rts_frame);
481 break;
482 }
483 ieee80211_rts_get(dev->wl->hw, info->control.vif,
484 fragment_data, fragment_len,
485 info, rts);
486 mac_ctl |= B43_TXH_MAC_SENDRTS;
487 len = sizeof(struct ieee80211_rts);
488 }
489 len += FCS_LEN;
490
491 /* Generate the PLCP headers for the RTS/CTS frame */
492 switch (dev->fw.hdr_format) {
493 case B43_FW_HDR_598:
494 plcp = &txhdr->format_598.rts_plcp;
495 break;
496 case B43_FW_HDR_351:
497 plcp = &txhdr->format_351.rts_plcp;
498 break;
499 case B43_FW_HDR_410:
500 plcp = &txhdr->format_410.rts_plcp;
501 break;
502 }
503 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
504 len, rts_rate);
505 plcp = &txhdr->rts_plcp_fb;
506 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
507 len, rts_rate_fb);
508
509 switch (dev->fw.hdr_format) {
510 case B43_FW_HDR_598:
511 hdr = (struct ieee80211_hdr *)
512 (&txhdr->format_598.rts_frame);
513 break;
514 case B43_FW_HDR_351:
515 hdr = (struct ieee80211_hdr *)
516 (&txhdr->format_351.rts_frame);
517 break;
518 case B43_FW_HDR_410:
519 hdr = (struct ieee80211_hdr *)
520 (&txhdr->format_410.rts_frame);
521 break;
522 }
523 txhdr->rts_dur_fb = hdr->duration_id;
524
525 if (rts_rate_ofdm) {
526 extra_ft |= B43_TXH_EFT_RTS_OFDM;
527 txhdr->phy_rate_rts =
528 b43_plcp_get_ratecode_ofdm(rts_rate);
529 } else {
530 extra_ft |= B43_TXH_EFT_RTS_CCK;
531 txhdr->phy_rate_rts =
532 b43_plcp_get_ratecode_cck(rts_rate);
533 }
534 if (rts_rate_fb_ofdm)
535 extra_ft |= B43_TXH_EFT_RTSFB_OFDM;
536 else
537 extra_ft |= B43_TXH_EFT_RTSFB_CCK;
538
539 if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS &&
540 fill_phy_ctl1) {
541 txhdr->phy_ctl1_rts = cpu_to_le16(
542 b43_generate_tx_phy_ctl1(dev, rts_rate));
543 txhdr->phy_ctl1_rts_fb = cpu_to_le16(
544 b43_generate_tx_phy_ctl1(dev, rts_rate_fb));
545 }
546 }
547
548 /* Magic cookie */
549 switch (dev->fw.hdr_format) {
550 case B43_FW_HDR_598:
551 txhdr->format_598.cookie = cpu_to_le16(cookie);
552 break;
553 case B43_FW_HDR_351:
554 txhdr->format_351.cookie = cpu_to_le16(cookie);
555 break;
556 case B43_FW_HDR_410:
557 txhdr->format_410.cookie = cpu_to_le16(cookie);
558 break;
559 }
560
561 if (fill_phy_ctl1) {
562 txhdr->phy_ctl1 =
563 cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate));
564 txhdr->phy_ctl1_fb =
565 cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate_fb));
566 }
567
568 /* Apply the bitfields */
569 txhdr->mac_ctl = cpu_to_le32(mac_ctl);
570 txhdr->phy_ctl = cpu_to_le16(phy_ctl);
571 txhdr->extra_ft = extra_ft;
572
573 return 0;
574 }
575
576 static s8 b43_rssi_postprocess(struct b43_wldev *dev,
577 u8 in_rssi, int ofdm,
578 int adjust_2053, int adjust_2050)
579 {
580 struct b43_phy *phy = &dev->phy;
581 struct b43_phy_g *gphy = phy->g;
582 s32 tmp;
583
584 switch (phy->radio_ver) {
585 case 0x2050:
586 if (ofdm) {
587 tmp = in_rssi;
588 if (tmp > 127)
589 tmp -= 256;
590 tmp *= 73;
591 tmp /= 64;
592 if (adjust_2050)
593 tmp += 25;
594 else
595 tmp -= 3;
596 } else {
597 if (dev->dev->bus_sprom->
598 boardflags_lo & B43_BFL_RSSI) {
599 if (in_rssi > 63)
600 in_rssi = 63;
601 B43_WARN_ON(phy->type != B43_PHYTYPE_G);
602 tmp = gphy->nrssi_lt[in_rssi];
603 tmp = 31 - tmp;
604 tmp *= -131;
605 tmp /= 128;
606 tmp -= 57;
607 } else {
608 tmp = in_rssi;
609 tmp = 31 - tmp;
610 tmp *= -149;
611 tmp /= 128;
612 tmp -= 68;
613 }
614 if (phy->type == B43_PHYTYPE_G && adjust_2050)
615 tmp += 25;
616 }
617 break;
618 case 0x2060:
619 if (in_rssi > 127)
620 tmp = in_rssi - 256;
621 else
622 tmp = in_rssi;
623 break;
624 default:
625 tmp = in_rssi;
626 tmp -= 11;
627 tmp *= 103;
628 tmp /= 64;
629 if (adjust_2053)
630 tmp -= 109;
631 else
632 tmp -= 83;
633 }
634
635 return (s8) tmp;
636 }
637
638 //TODO
639 #if 0
640 static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi)
641 {
642 struct b43_phy *phy = &dev->phy;
643 s8 ret;
644
645 if (phy->type == B43_PHYTYPE_A) {
646 //TODO: Incomplete specs.
647 ret = 0;
648 } else
649 ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1);
650
651 return ret;
652 }
653 #endif
654
655 void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
656 {
657 struct ieee80211_rx_status status;
658 struct b43_plcp_hdr6 *plcp;
659 struct ieee80211_hdr *wlhdr;
660 const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;
661 __le16 fctl;
662 u16 phystat0, phystat3;
663 u16 uninitialized_var(chanstat), uninitialized_var(mactime);
664 u32 uninitialized_var(macstat);
665 u16 chanid;
666 u16 phytype;
667 int padding, rate_idx;
668
669 memset(&status, 0, sizeof(status));
670
671 /* Get metadata about the frame from the header. */
672 phystat0 = le16_to_cpu(rxhdr->phy_status0);
673 phystat3 = le16_to_cpu(rxhdr->phy_status3);
674 switch (dev->fw.hdr_format) {
675 case B43_FW_HDR_598:
676 macstat = le32_to_cpu(rxhdr->format_598.mac_status);
677 mactime = le16_to_cpu(rxhdr->format_598.mac_time);
678 chanstat = le16_to_cpu(rxhdr->format_598.channel);
679 break;
680 case B43_FW_HDR_410:
681 case B43_FW_HDR_351:
682 macstat = le32_to_cpu(rxhdr->format_351.mac_status);
683 mactime = le16_to_cpu(rxhdr->format_351.mac_time);
684 chanstat = le16_to_cpu(rxhdr->format_351.channel);
685 break;
686 }
687 phytype = chanstat & B43_RX_CHAN_PHYTYPE;
688
689 if (unlikely(macstat & B43_RX_MAC_FCSERR)) {
690 dev->wl->ieee_stats.dot11FCSErrorCount++;
691 status.flag |= RX_FLAG_FAILED_FCS_CRC;
692 }
693 if (unlikely(phystat0 & (B43_RX_PHYST0_PLCPHCF | B43_RX_PHYST0_PLCPFV)))
694 status.flag |= RX_FLAG_FAILED_PLCP_CRC;
695 if (phystat0 & B43_RX_PHYST0_SHORTPRMBL)
696 status.flag |= RX_FLAG_SHORTPRE;
697 if (macstat & B43_RX_MAC_DECERR) {
698 /* Decryption with the given key failed.
699 * Drop the packet. We also won't be able to decrypt it with
700 * the key in software. */
701 goto drop;
702 }
703
704 /* Skip PLCP and padding */
705 padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
706 if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {
707 b43dbg(dev->wl, "RX: Packet size underrun (1)\n");
708 goto drop;
709 }
710 plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);
711 skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);
712 /* The skb contains the Wireless Header + payload data now */
713 if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) {
714 b43dbg(dev->wl, "RX: Packet size underrun (2)\n");
715 goto drop;
716 }
717 wlhdr = (struct ieee80211_hdr *)(skb->data);
718 fctl = wlhdr->frame_control;
719
720 if (macstat & B43_RX_MAC_DEC) {
721 unsigned int keyidx;
722 int wlhdr_len;
723
724 keyidx = ((macstat & B43_RX_MAC_KEYIDX)
725 >> B43_RX_MAC_KEYIDX_SHIFT);
726 /* We must adjust the key index here. We want the "physical"
727 * key index, but the ucode passed it slightly different.
728 */
729 keyidx = b43_kidx_to_raw(dev, keyidx);
730 B43_WARN_ON(keyidx >= ARRAY_SIZE(dev->key));
731
732 if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
733 wlhdr_len = ieee80211_hdrlen(fctl);
734 if (unlikely(skb->len < (wlhdr_len + 3))) {
735 b43dbg(dev->wl,
736 "RX: Packet size underrun (3)\n");
737 goto drop;
738 }
739 status.flag |= RX_FLAG_DECRYPTED;
740 }
741 }
742
743 /* Link quality statistics */
744 switch (chanstat & B43_RX_CHAN_PHYTYPE) {
745 case B43_PHYTYPE_HT:
746 /* TODO: is max the right choice? */
747 status.signal = max_t(__s8,
748 max(rxhdr->phy_ht_power0, rxhdr->phy_ht_power1),
749 rxhdr->phy_ht_power2);
750 break;
751 case B43_PHYTYPE_N:
752 /* Broadcom has code for min and avg, but always uses max */
753 if (rxhdr->power0 == 16 || rxhdr->power0 == 32)
754 status.signal = max(rxhdr->power1, rxhdr->power2);
755 else
756 status.signal = max(rxhdr->power0, rxhdr->power1);
757 break;
758 case B43_PHYTYPE_A:
759 case B43_PHYTYPE_B:
760 case B43_PHYTYPE_G:
761 case B43_PHYTYPE_LP:
762 status.signal = b43_rssi_postprocess(dev, rxhdr->jssi,
763 (phystat0 & B43_RX_PHYST0_OFDM),
764 (phystat0 & B43_RX_PHYST0_GAINCTL),
765 (phystat3 & B43_RX_PHYST3_TRSTATE));
766 break;
767 }
768
769 if (phystat0 & B43_RX_PHYST0_OFDM)
770 rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,
771 !!(chanstat & B43_RX_CHAN_5GHZ));
772 else
773 rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);
774 if (unlikely(rate_idx == -1)) {
775 /* PLCP seems to be corrupted.
776 * Drop the frame, if we are not interested in corrupted frames. */
777 if (!(dev->wl->filter_flags & FIF_PLCPFAIL))
778 goto drop;
779 }
780 status.rate_idx = rate_idx;
781 status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
782
783 /*
784 * All frames on monitor interfaces and beacons always need a full
785 * 64-bit timestamp. Monitor interfaces need it for diagnostic
786 * purposes and beacons for IBSS merging.
787 * This code assumes we get to process the packet within 16 bits
788 * of timestamp, i.e. about 65 milliseconds after the PHY received
789 * the first symbol.
790 */
791 if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
792 u16 low_mactime_now;
793
794 b43_tsf_read(dev, &status.mactime);
795 low_mactime_now = status.mactime;
796 status.mactime = status.mactime & ~0xFFFFULL;
797 status.mactime += mactime;
798 if (low_mactime_now <= mactime)
799 status.mactime -= 0x10000;
800 status.flag |= RX_FLAG_MACTIME_START;
801 }
802
803 chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
804 switch (chanstat & B43_RX_CHAN_PHYTYPE) {
805 case B43_PHYTYPE_A:
806 status.band = IEEE80211_BAND_5GHZ;
807 B43_WARN_ON(1);
808 /* FIXME: We don't really know which value the "chanid" contains.
809 * So the following assignment might be wrong. */
810 status.freq =
811 ieee80211_channel_to_frequency(chanid, status.band);
812 break;
813 case B43_PHYTYPE_G:
814 status.band = IEEE80211_BAND_2GHZ;
815 /* Somewhere between 478.104 and 508.1084 firmware for G-PHY
816 * has been modified to be compatible with N-PHY and others.
817 */
818 if (dev->fw.rev >= 508)
819 status.freq = ieee80211_channel_to_frequency(chanid, status.band);
820 else
821 status.freq = chanid + 2400;
822 break;
823 case B43_PHYTYPE_N:
824 case B43_PHYTYPE_LP:
825 case B43_PHYTYPE_HT:
826 /* chanid is the SHM channel cookie. Which is the plain
827 * channel number in b43. */
828 if (chanstat & B43_RX_CHAN_5GHZ)
829 status.band = IEEE80211_BAND_5GHZ;
830 else
831 status.band = IEEE80211_BAND_2GHZ;
832 status.freq =
833 ieee80211_channel_to_frequency(chanid, status.band);
834 break;
835 default:
836 B43_WARN_ON(1);
837 goto drop;
838 }
839
840 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
841 ieee80211_rx_ni(dev->wl->hw, skb);
842
843 #if B43_DEBUG
844 dev->rx_count++;
845 #endif
846 return;
847 drop:
848 dev_kfree_skb_any(skb);
849 }
850
851 void b43_handle_txstatus(struct b43_wldev *dev,
852 const struct b43_txstatus *status)
853 {
854 b43_debugfs_log_txstat(dev, status);
855
856 if (status->intermediate)
857 return;
858 if (status->for_ampdu)
859 return;
860 if (!status->acked)
861 dev->wl->ieee_stats.dot11ACKFailureCount++;
862 if (status->rts_count) {
863 if (status->rts_count == 0xF) //FIXME
864 dev->wl->ieee_stats.dot11RTSFailureCount++;
865 else
866 dev->wl->ieee_stats.dot11RTSSuccessCount++;
867 }
868
869 if (b43_using_pio_transfers(dev))
870 b43_pio_handle_txstatus(dev, status);
871 else
872 b43_dma_handle_txstatus(dev, status);
873
874 b43_phy_txpower_check(dev, 0);
875 }
876
877 /* Fill out the mac80211 TXstatus report based on the b43-specific
878 * txstatus report data. This returns a boolean whether the frame was
879 * successfully transmitted. */
880 bool b43_fill_txstatus_report(struct b43_wldev *dev,
881 struct ieee80211_tx_info *report,
882 const struct b43_txstatus *status)
883 {
884 bool frame_success = true;
885 int retry_limit;
886
887 /* preserve the confiured retry limit before clearing the status
888 * The xmit function has overwritten the rc's value with the actual
889 * retry limit done by the hardware */
890 retry_limit = report->status.rates[0].count;
891 ieee80211_tx_info_clear_status(report);
892
893 if (status->acked) {
894 /* The frame was ACKed. */
895 report->flags |= IEEE80211_TX_STAT_ACK;
896 } else {
897 /* The frame was not ACKed... */
898 if (!(report->flags & IEEE80211_TX_CTL_NO_ACK)) {
899 /* ...but we expected an ACK. */
900 frame_success = false;
901 }
902 }
903 if (status->frame_count == 0) {
904 /* The frame was not transmitted at all. */
905 report->status.rates[0].count = 0;
906 } else if (status->rts_count > dev->wl->hw->conf.short_frame_max_tx_count) {
907 /*
908 * If the short retries (RTS, not data frame) have exceeded
909 * the limit, the hw will not have tried the selected rate,
910 * but will have used the fallback rate instead.
911 * Don't let the rate control count attempts for the selected
912 * rate in this case, otherwise the statistics will be off.
913 */
914 report->status.rates[0].count = 0;
915 report->status.rates[1].count = status->frame_count;
916 } else {
917 if (status->frame_count > retry_limit) {
918 report->status.rates[0].count = retry_limit;
919 report->status.rates[1].count = status->frame_count -
920 retry_limit;
921
922 } else {
923 report->status.rates[0].count = status->frame_count;
924 report->status.rates[1].idx = -1;
925 }
926 }
927
928 return frame_success;
929 }
930
931 /* Stop any TX operation on the device (suspend the hardware queues) */
932 void b43_tx_suspend(struct b43_wldev *dev)
933 {
934 if (b43_using_pio_transfers(dev))
935 b43_pio_tx_suspend(dev);
936 else
937 b43_dma_tx_suspend(dev);
938 }
939
940 /* Resume any TX operation on the device (resume the hardware queues) */
941 void b43_tx_resume(struct b43_wldev *dev)
942 {
943 if (b43_using_pio_transfers(dev))
944 b43_pio_tx_resume(dev);
945 else
946 b43_dma_tx_resume(dev);
947 }
Linux with added FPC-III support