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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / net / wireless / b43legacy / xmit.c
blob103f3c9e7f58afd00299a155dca245c12ddd5b26
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_ofdm;
325 int rts_rate_fb_ofdm;
326
327 rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
328 rts_rate_ofdm = b43legacy_is_ofdm_rate(rts_rate);
329 rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
330 rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
331 if (rts_rate_fb_ofdm)
332 mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
333
334 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
335 ieee80211_ctstoself_get(dev->wl->hw,
336 info->control.vif,
337 fragment_data,
338 fragment_len, info,
339 (struct ieee80211_cts *)
340 (txhdr->rts_frame));
341 mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
342 len = sizeof(struct ieee80211_cts);
343 } else {
344 ieee80211_rts_get(dev->wl->hw,
345 info->control.vif,
346 fragment_data, fragment_len, info,
347 (struct ieee80211_rts *)
348 (txhdr->rts_frame));
349 mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
350 len = sizeof(struct ieee80211_rts);
351 }
352 len += FCS_LEN;
353 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
354 (&txhdr->rts_plcp),
355 len, rts_rate);
356 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
357 (&txhdr->rts_plcp_fb),
358 len, rts_rate_fb);
359 hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
360 txhdr->rts_dur_fb = hdr->duration_id;
361 }
362
363 /* Magic cookie */
364 txhdr->cookie = cpu_to_le16(cookie);
365
366 /* Apply the bitfields */
367 txhdr->mac_ctl = cpu_to_le32(mac_ctl);
368 txhdr->phy_ctl = cpu_to_le16(phy_ctl);
369
370 return 0;
371 }
372
373 int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
374 u8 *txhdr,
375 const unsigned char *fragment_data,
376 unsigned int fragment_len,
377 struct ieee80211_tx_info *info,
378 u16 cookie)
379 {
380 return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
381 fragment_data, fragment_len,
382 info, cookie);
383 }
384
385 static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
386 u8 in_rssi, int ofdm,
387 int adjust_2053, int adjust_2050)
388 {
389 struct b43legacy_phy *phy = &dev->phy;
390 s32 tmp;
391
392 switch (phy->radio_ver) {
393 case 0x2050:
394 if (ofdm) {
395 tmp = in_rssi;
396 if (tmp > 127)
397 tmp -= 256;
398 tmp *= 73;
399 tmp /= 64;
400 if (adjust_2050)
401 tmp += 25;
402 else
403 tmp -= 3;
404 } else {
405 if (dev->dev->bus->sprom.boardflags_lo
406 & B43legacy_BFL_RSSI) {
407 if (in_rssi > 63)
408 in_rssi = 63;
409 tmp = phy->nrssi_lt[in_rssi];
410 tmp = 31 - tmp;
411 tmp *= -131;
412 tmp /= 128;
413 tmp -= 57;
414 } else {
415 tmp = in_rssi;
416 tmp = 31 - tmp;
417 tmp *= -149;
418 tmp /= 128;
419 tmp -= 68;
420 }
421 if (phy->type == B43legacy_PHYTYPE_G &&
422 adjust_2050)
423 tmp += 25;
424 }
425 break;
426 case 0x2060:
427 if (in_rssi > 127)
428 tmp = in_rssi - 256;
429 else
430 tmp = in_rssi;
431 break;
432 default:
433 tmp = in_rssi;
434 tmp -= 11;
435 tmp *= 103;
436 tmp /= 64;
437 if (adjust_2053)
438 tmp -= 109;
439 else
440 tmp -= 83;
441 }
442
443 return (s8)tmp;
444 }
445
446 void b43legacy_rx(struct b43legacy_wldev *dev,
447 struct sk_buff *skb,
448 const void *_rxhdr)
449 {
450 struct ieee80211_rx_status status;
451 struct b43legacy_plcp_hdr6 *plcp;
452 struct ieee80211_hdr *wlhdr;
453 const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
454 __le16 fctl;
455 u16 phystat0;
456 u16 phystat3;
457 u16 chanstat;
458 u16 mactime;
459 u32 macstat;
460 u16 chanid;
461 u8 jssi;
462 int padding;
463
464 memset(&status, 0, sizeof(status));
465
466 /* Get metadata about the frame from the header. */
467 phystat0 = le16_to_cpu(rxhdr->phy_status0);
468 phystat3 = le16_to_cpu(rxhdr->phy_status3);
469 jssi = rxhdr->jssi;
470 macstat = le16_to_cpu(rxhdr->mac_status);
471 mactime = le16_to_cpu(rxhdr->mac_time);
472 chanstat = le16_to_cpu(rxhdr->channel);
473
474 if (macstat & B43legacy_RX_MAC_FCSERR)
475 dev->wl->ieee_stats.dot11FCSErrorCount++;
476
477 /* Skip PLCP and padding */
478 padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
479 if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
480 padding))) {
481 b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
482 goto drop;
483 }
484 plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
485 skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
486 /* The skb contains the Wireless Header + payload data now */
487 if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
488 b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
489 goto drop;
490 }
491 wlhdr = (struct ieee80211_hdr *)(skb->data);
492 fctl = wlhdr->frame_control;
493
494 if ((macstat & B43legacy_RX_MAC_DEC) &&
495 !(macstat & B43legacy_RX_MAC_DECERR)) {
496 unsigned int keyidx;
497 int wlhdr_len;
498 int iv_len;
499 int icv_len;
500
501 keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
502 >> B43legacy_RX_MAC_KEYIDX_SHIFT);
503 /* We must adjust the key index here. We want the "physical"
504 * key index, but the ucode passed it slightly different.
505 */
506 keyidx = b43legacy_kidx_to_raw(dev, keyidx);
507 B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
508
509 if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
510 /* Remove PROTECTED flag to mark it as decrypted. */
511 B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
512 fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
513 wlhdr->frame_control = fctl;
514
515 wlhdr_len = ieee80211_hdrlen(fctl);
516 if (unlikely(skb->len < (wlhdr_len + 3))) {
517 b43legacydbg(dev->wl, "RX: Packet size"
518 " underrun3\n");
519 goto drop;
520 }
521 if (skb->data[wlhdr_len + 3] & (1 << 5)) {
522 /* The Ext-IV Bit is set in the "KeyID"
523 * octet of the IV.
524 */
525 iv_len = 8;
526 icv_len = 8;
527 } else {
528 iv_len = 4;
529 icv_len = 4;
530 }
531 if (unlikely(skb->len < (wlhdr_len + iv_len +
532 icv_len))) {
533 b43legacydbg(dev->wl, "RX: Packet size"
534 " underrun4\n");
535 goto drop;
536 }
537 /* Remove the IV */
538 memmove(skb->data + iv_len, skb->data, wlhdr_len);
539 skb_pull(skb, iv_len);
540 /* Remove the ICV */
541 skb_trim(skb, skb->len - icv_len);
542
543 status.flag |= RX_FLAG_DECRYPTED;
544 }
545 }
546
547 status.signal = b43legacy_rssi_postprocess(dev, jssi,
548 (phystat0 & B43legacy_RX_PHYST0_OFDM),
549 (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
550 (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
551 status.noise = dev->stats.link_noise;
552 status.qual = (jssi * 100) / B43legacy_RX_MAX_SSI;
553 /* change to support A PHY */
554 if (phystat0 & B43legacy_RX_PHYST0_OFDM)
555 status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
556 else
557 status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
558 status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
559
560 /*
561 * All frames on monitor interfaces and beacons always need a full
562 * 64-bit timestamp. Monitor interfaces need it for diagnostic
563 * purposes and beacons for IBSS merging.
564 * This code assumes we get to process the packet within 16 bits
565 * of timestamp, i.e. about 65 milliseconds after the PHY received
566 * the first symbol.
567 */
568 if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
569 u16 low_mactime_now;
570
571 b43legacy_tsf_read(dev, &status.mactime);
572 low_mactime_now = status.mactime;
573 status.mactime = status.mactime & ~0xFFFFULL;
574 status.mactime += mactime;
575 if (low_mactime_now <= mactime)
576 status.mactime -= 0x10000;
577 status.flag |= RX_FLAG_TSFT;
578 }
579
580 chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
581 B43legacy_RX_CHAN_ID_SHIFT;
582 switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
583 case B43legacy_PHYTYPE_B:
584 case B43legacy_PHYTYPE_G:
585 status.band = IEEE80211_BAND_2GHZ;
586 status.freq = chanid + 2400;
587 break;
588 default:
589 b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
590 chanstat);
591 }
592
593 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
594 ieee80211_rx_irqsafe(dev->wl->hw, skb);
595
596 return;
597 drop:
598 b43legacydbg(dev->wl, "RX: Packet dropped\n");
599 dev_kfree_skb_any(skb);
600 }
601
602 void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
603 const struct b43legacy_txstatus *status)
604 {
605 b43legacy_debugfs_log_txstat(dev, status);
606
607 if (status->intermediate)
608 return;
609 if (status->for_ampdu)
610 return;
611 if (!status->acked)
612 dev->wl->ieee_stats.dot11ACKFailureCount++;
613 if (status->rts_count) {
614 if (status->rts_count == 0xF) /* FIXME */
615 dev->wl->ieee_stats.dot11RTSFailureCount++;
616 else
617 dev->wl->ieee_stats.dot11RTSSuccessCount++;
618 }
619
620 if (b43legacy_using_pio(dev))
621 b43legacy_pio_handle_txstatus(dev, status);
622 else
623 b43legacy_dma_handle_txstatus(dev, status);
624 }
625
626 /* Handle TX status report as received through DMA/PIO queues */
627 void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
628 const struct b43legacy_hwtxstatus *hw)
629 {
630 struct b43legacy_txstatus status;
631 u8 tmp;
632
633 status.cookie = le16_to_cpu(hw->cookie);
634 status.seq = le16_to_cpu(hw->seq);
635 status.phy_stat = hw->phy_stat;
636 tmp = hw->count;
637 status.frame_count = (tmp >> 4);
638 status.rts_count = (tmp & 0x0F);
639 tmp = hw->flags << 1;
640 status.supp_reason = ((tmp & 0x1C) >> 2);
641 status.pm_indicated = !!(tmp & 0x80);
642 status.intermediate = !!(tmp & 0x40);
643 status.for_ampdu = !!(tmp & 0x20);
644 status.acked = !!(tmp & 0x02);
645
646 b43legacy_handle_txstatus(dev, &status);
647 }
648
649 /* Stop any TX operation on the device (suspend the hardware queues) */
650 void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
651 {
652 if (b43legacy_using_pio(dev))
653 b43legacy_pio_freeze_txqueues(dev);
654 else
655 b43legacy_dma_tx_suspend(dev);
656 }
657
658 /* Resume any TX operation on the device (resume the hardware queues) */
659 void b43legacy_tx_resume(struct b43legacy_wldev *dev)
660 {
661 if (b43legacy_using_pio(dev))
662 b43legacy_pio_thaw_txqueues(dev);
663 else
664 b43legacy_dma_tx_resume(dev);
665 }
666
667 /* Initialize the QoS parameters */
668 void b43legacy_qos_init(struct b43legacy_wldev *dev)
669 {
670 /* FIXME: This function must probably be called from the mac80211
671 * config callback. */
672 return;
673
674 b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
675 /* FIXME kill magic */
676 b43legacy_write16(dev, 0x688,
677 b43legacy_read16(dev, 0x688) | 0x4);
678
679
680 /*TODO: We might need some stack support here to get the values. */
681 }
Linux for Ginger Game Console