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b43: move under broadcom vendor directory
[linux-2.6-block.git] / drivers / net / wireless / b43legacy / xmit.c
CommitLineData
75388acd
LF		 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>
1f21ad2a 8 Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
eb032b98 9 Copyright (C) 2005, 2006 Michael Buesch <m@bues.ch>
75388acd
LF		 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. */
8318d78a 40static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
75388acd
LF		 41{
42 switch (plcp->raw[0]) {
43 case 0x0A:
8318d78a 44 return 0;
75388acd 45 case 0x14:
8318d78a 46 return 1;
75388acd 47 case 0x37:
8318d78a 48 return 2;
75388acd 49 case 0x6E:
8318d78a 50 return 3;
75388acd
LF		 51 }
52 B43legacy_BUG_ON(1);
8318d78a 53 return -1;
75388acd
LF		 54}
55
56/* Extract the bitrate out of an OFDM PLCP header. */
8318d78a
JB		 57static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
58 bool aphy)
75388acd 59{
8318d78a
JB		 60 int base = aphy ? 0 : 4;
61
75388acd
LF		 62 switch (plcp->raw[0] & 0xF) {
63 case 0xB:
8318d78a 64 return base + 0;
75388acd 65 case 0xF:
8318d78a 66 return base + 1;
75388acd 67 case 0xA:
8318d78a 68 return base + 2;
75388acd 69 case 0xE:
8318d78a 70 return base + 3;
75388acd 71 case 0x9:
8318d78a 72 return base + 4;
75388acd 73 case 0xD:
8318d78a 74 return base + 5;
75388acd 75 case 0x8:
8318d78a 76 return base + 6;
75388acd 77 case 0xC:
8318d78a 78 return base + 7;
75388acd
LF		 79 }
80 B43legacy_BUG_ON(1);
8318d78a 81 return -1;
75388acd
LF		 82}
83
84u8 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
100u8 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
124void 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
155static 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
9eca9a8e 187static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
75388acd
LF		 188 struct b43legacy_txhdr_fw3 *txhdr,
189 const unsigned char *fragment_data,
190 unsigned int fragment_len,
e6a9854b 191 struct ieee80211_tx_info *info,
75388acd
LF		 192 u16 cookie)
193{
194 const struct ieee80211_hdr *wlhdr;
d0f09804 195 int use_encryption = !!info->control.hw_key;
75388acd 196 u8 rate;
8318d78a 197 struct ieee80211_rate *rate_fb;
75388acd
LF		 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;
2e92e6f2 203 struct ieee80211_rate *tx_rate;
e6a9854b 204 struct ieee80211_tx_rate *rates;
75388acd
LF		 205
206 wlhdr = (const struct ieee80211_hdr *)fragment_data;
75388acd
LF		 207
208 memset(txhdr, 0, sizeof(*txhdr));
209
e039fa4a 210 tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);
2e92e6f2
JB		 211
212 rate = tx_rate->hw_value;
75388acd 213 rate_ofdm = b43legacy_is_ofdm_rate(rate);
870abdf6 214 rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
8318d78a 215 rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
75388acd
LF		 216
217 txhdr->mac_frame_ctl = wlhdr->frame_control;
d458cdf7 218 memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN);
75388acd
LF		 219
220 /* Calculate duration for fallback rate */
8318d78a 221 if ((rate_fb->hw_value == rate) ||
75388acd
LF		 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 {
75388acd 229 txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
e039fa4a 230 info->control.vif,
4ee73f33 231 info->band,
75388acd 232 fragment_len,
8318d78a 233 rate_fb);
75388acd
LF		 234 }
235
236 plcp_fragment_len = fragment_len + FCS_LEN;
237 if (use_encryption) {
e039fa4a 238 u8 key_idx = info->control.hw_key->hw_key_idx;
75388acd
LF		 239 struct b43legacy_key *key;
240 int wlhdr_len;
241 size_t iv_len;
242
243 B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
244 key = &(dev->key[key_idx]);
245
246 if (key->enabled) {
247 /* Hardware appends ICV. */
76708dee 248 plcp_fragment_len += info->control.hw_key->icv_len;
75388acd
LF		 249
250 key_idx = b43legacy_kidx_to_fw(dev, key_idx);
251 mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
252 B43legacy_TX4_MAC_KEYIDX;
253 mac_ctl |= (key->algorithm <<
254 B43legacy_TX4_MAC_KEYALG_SHIFT) &
255 B43legacy_TX4_MAC_KEYALG;
ba5b6efe 256 wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
c8e49556 257 iv_len = min_t(size_t, info->control.hw_key->iv_len,
75388acd
LF		 258 ARRAY_SIZE(txhdr->iv));
259 memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
9eca9a8e
SB		 260 } else {
261 /* This key is invalid. This might only happen
262 * in a short timeframe after machine resume before
263 * we were able to reconfigure keys.
264 * Drop this packet completely. Do not transmit it
265 * unencrypted to avoid leaking information. */
266 return -ENOKEY;
75388acd
LF		 267 }
268 }
269 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
270 (&txhdr->plcp), plcp_fragment_len,
271 rate);
2c208890 272 b43legacy_generate_plcp_hdr(&txhdr->plcp_fb, plcp_fragment_len,
8318d78a 273 rate_fb->hw_value);
75388acd
LF		 274
275 /* PHY TX Control word */
276 if (rate_ofdm)
2d1f96dd 277 phy_ctl |= B43legacy_TX4_PHY_ENC_OFDM;
e6a9854b 278 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
75388acd 279 phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
d748b464 280 phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
75388acd
LF		 281
282 /* MAC control */
e6a9854b 283 rates = info->control.rates;
e039fa4a 284 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
75388acd 285 mac_ctl |= B43legacy_TX4_MAC_ACK;
f591fa5d 286 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
75388acd 287 mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
e039fa4a 288 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
75388acd
LF		 289 mac_ctl |= B43legacy_TX4_MAC_STMSDU;
290 if (rate_fb_ofdm)
291 mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
e6a9854b
JB		 292
293 /* Overwrite rates[0].count to make the retry calculation
294 * in the tx status easier. need the actual retry limit to
295 * detect whether the fallback rate was used.
296 */
297 if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
298 (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
299 rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
0a6e1bee 300 mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
e6a9854b
JB		 301 } else {
302 rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
303 }
75388acd
LF		 304
305 /* Generate the RTS or CTS-to-self frame */
e6a9854b
JB		 306 if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
307 (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
75388acd
LF		 308 unsigned int len;
309 struct ieee80211_hdr *hdr;
310 int rts_rate;
311 int rts_rate_fb;
75388acd
LF		 312 int rts_rate_fb_ofdm;
313
e039fa4a 314 rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
75388acd
LF		 315 rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
316 rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
317 if (rts_rate_fb_ofdm)
318 mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
319
e6a9854b 320 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
75388acd 321 ieee80211_ctstoself_get(dev->wl->hw,
e039fa4a 322 info->control.vif,
75388acd 323 fragment_data,
e039fa4a 324 fragment_len, info,
75388acd
LF		 325 (struct ieee80211_cts *)
326 (txhdr->rts_frame));
327 mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
328 len = sizeof(struct ieee80211_cts);
329 } else {
330 ieee80211_rts_get(dev->wl->hw,
e039fa4a
JB		 331 info->control.vif,
332 fragment_data, fragment_len, info,
75388acd
LF		 333 (struct ieee80211_rts *)
334 (txhdr->rts_frame));
335 mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
336 len = sizeof(struct ieee80211_rts);
337 }
338 len += FCS_LEN;
339 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
340 (&txhdr->rts_plcp),
341 len, rts_rate);
2c208890 342 b43legacy_generate_plcp_hdr(&txhdr->rts_plcp_fb,
75388acd
LF		 343 len, rts_rate_fb);
344 hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
345 txhdr->rts_dur_fb = hdr->duration_id;
75388acd
LF		 346 }
347
348 /* Magic cookie */
349 txhdr->cookie = cpu_to_le16(cookie);
350
351 /* Apply the bitfields */
352 txhdr->mac_ctl = cpu_to_le32(mac_ctl);
353 txhdr->phy_ctl = cpu_to_le16(phy_ctl);
9eca9a8e
SB		 354
355 return 0;
75388acd
LF		 356}
357
9eca9a8e 358int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
75388acd
LF		 359 u8 *txhdr,
360 const unsigned char *fragment_data,
361 unsigned int fragment_len,
e6a9854b 362 struct ieee80211_tx_info *info,
75388acd
LF		 363 u16 cookie)
364{
9eca9a8e 365 return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
75388acd 366 fragment_data, fragment_len,
e039fa4a 367 info, cookie);
75388acd
LF		 368}
369
370static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
371 u8 in_rssi, int ofdm,
372 int adjust_2053, int adjust_2050)
373{
374 struct b43legacy_phy *phy = &dev->phy;
375 s32 tmp;
376
377 switch (phy->radio_ver) {
378 case 0x2050:
379 if (ofdm) {
380 tmp = in_rssi;
381 if (tmp > 127)
382 tmp -= 256;
383 tmp *= 73;
384 tmp /= 64;
385 if (adjust_2050)
386 tmp += 25;
387 else
388 tmp -= 3;
389 } else {
7797aa38 390 if (dev->dev->bus->sprom.boardflags_lo
75388acd
LF		 391 & B43legacy_BFL_RSSI) {
392 if (in_rssi > 63)
393 in_rssi = 63;
394 tmp = phy->nrssi_lt[in_rssi];
395 tmp = 31 - tmp;
396 tmp *= -131;
397 tmp /= 128;
398 tmp -= 57;
399 } else {
400 tmp = in_rssi;
401 tmp = 31 - tmp;
402 tmp *= -149;
403 tmp /= 128;
404 tmp -= 68;
405 }
406 if (phy->type == B43legacy_PHYTYPE_G &&
407 adjust_2050)
408 tmp += 25;
409 }
410 break;
411 case 0x2060:
412 if (in_rssi > 127)
413 tmp = in_rssi - 256;
414 else
415 tmp = in_rssi;
416 break;
417 default:
418 tmp = in_rssi;
419 tmp -= 11;
420 tmp *= 103;
421 tmp /= 64;
422 if (adjust_2053)
423 tmp -= 109;
424 else
425 tmp -= 83;
426 }
427
428 return (s8)tmp;
429}
430
431void b43legacy_rx(struct b43legacy_wldev *dev,
432 struct sk_buff *skb,
433 const void *_rxhdr)
434{
435 struct ieee80211_rx_status status;
436 struct b43legacy_plcp_hdr6 *plcp;
437 struct ieee80211_hdr *wlhdr;
438 const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
b99a017c 439 __le16 fctl;
75388acd
LF		 440 u16 phystat0;
441 u16 phystat3;
442 u16 chanstat;
443 u16 mactime;
444 u32 macstat;
445 u16 chanid;
446 u8 jssi;
447 int padding;
448
449 memset(&status, 0, sizeof(status));
450
451 /* Get metadata about the frame from the header. */
452 phystat0 = le16_to_cpu(rxhdr->phy_status0);
453 phystat3 = le16_to_cpu(rxhdr->phy_status3);
454 jssi = rxhdr->jssi;
455 macstat = le16_to_cpu(rxhdr->mac_status);
456 mactime = le16_to_cpu(rxhdr->mac_time);
457 chanstat = le16_to_cpu(rxhdr->channel);
458
459 if (macstat & B43legacy_RX_MAC_FCSERR)
460 dev->wl->ieee_stats.dot11FCSErrorCount++;
461
462 /* Skip PLCP and padding */
463 padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
464 if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
465 padding))) {
466 b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
467 goto drop;
468 }
469 plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
470 skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
471 /* The skb contains the Wireless Header + payload data now */
472 if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
473 b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
474 goto drop;
475 }
476 wlhdr = (struct ieee80211_hdr *)(skb->data);
b99a017c 477 fctl = wlhdr->frame_control;
75388acd
LF		 478
479 if ((macstat & B43legacy_RX_MAC_DEC) &&
480 !(macstat & B43legacy_RX_MAC_DECERR)) {
481 unsigned int keyidx;
482 int wlhdr_len;
483 int iv_len;
484 int icv_len;
485
486 keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
487 >> B43legacy_RX_MAC_KEYIDX_SHIFT);
488 /* We must adjust the key index here. We want the "physical"
489 * key index, but the ucode passed it slightly different.
490 */
491 keyidx = b43legacy_kidx_to_raw(dev, keyidx);
492 B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
493
494 if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
495 /* Remove PROTECTED flag to mark it as decrypted. */
b99a017c
HH		 496 B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
497 fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
498 wlhdr->frame_control = fctl;
75388acd 499
b99a017c 500 wlhdr_len = ieee80211_hdrlen(fctl);
75388acd
LF		 501 if (unlikely(skb->len < (wlhdr_len + 3))) {
502 b43legacydbg(dev->wl, "RX: Packet size"
503 " underrun3\n");
504 goto drop;
505 }
506 if (skb->data[wlhdr_len + 3] & (1 << 5)) {
507 /* The Ext-IV Bit is set in the "KeyID"
508 * octet of the IV.
509 */
510 iv_len = 8;
511 icv_len = 8;
512 } else {
513 iv_len = 4;
514 icv_len = 4;
515 }
516 if (unlikely(skb->len < (wlhdr_len + iv_len +
517 icv_len))) {
518 b43legacydbg(dev->wl, "RX: Packet size"
519 " underrun4\n");
520 goto drop;
521 }
522 /* Remove the IV */
523 memmove(skb->data + iv_len, skb->data, wlhdr_len);
524 skb_pull(skb, iv_len);
525 /* Remove the ICV */
526 skb_trim(skb, skb->len - icv_len);
527
528 status.flag |= RX_FLAG_DECRYPTED;
529 }
530 }
531
566bfe5a 532 status.signal = b43legacy_rssi_postprocess(dev, jssi,
75388acd
LF		 533 (phystat0 & B43legacy_RX_PHYST0_OFDM),
534 (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
535 (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
8318d78a 536 /* change to support A PHY */
75388acd 537 if (phystat0 & B43legacy_RX_PHYST0_OFDM)
8318d78a 538 status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
75388acd 539 else
8318d78a 540 status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
75388acd 541 status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
c0ddd04d
JL		 542
543 /*
d007b7f4
JB		 544 * All frames on monitor interfaces and beacons always need a full
545 * 64-bit timestamp. Monitor interfaces need it for diagnostic
546 * purposes and beacons for IBSS merging.
547 * This code assumes we get to process the packet within 16 bits
548 * of timestamp, i.e. about 65 milliseconds after the PHY received
549 * the first symbol.
c0ddd04d 550 */
b99a017c 551 if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
c0ddd04d
JL		 552 u16 low_mactime_now;
553
554 b43legacy_tsf_read(dev, &status.mactime);
555 low_mactime_now = status.mactime;
556 status.mactime = status.mactime & ~0xFFFFULL;
557 status.mactime += mactime;
558 if (low_mactime_now <= mactime)
559 status.mactime -= 0x10000;
f4bda337 560 status.flag |= RX_FLAG_MACTIME_START;
c0ddd04d 561 }
75388acd
LF		 562
563 chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
564 B43legacy_RX_CHAN_ID_SHIFT;
565 switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
566 case B43legacy_PHYTYPE_B:
75388acd 567 case B43legacy_PHYTYPE_G:
8318d78a 568 status.band = IEEE80211_BAND_2GHZ;
75388acd 569 status.freq = chanid + 2400;
75388acd
LF		 570 break;
571 default:
572 b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
573 chanstat);
574 }
575
f1d58c25
JB		 576 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
577 ieee80211_rx_irqsafe(dev->wl->hw, skb);
75388acd
LF		 578
579 return;
580drop:
581 b43legacydbg(dev->wl, "RX: Packet dropped\n");
582 dev_kfree_skb_any(skb);
583}
584
585void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
586 const struct b43legacy_txstatus *status)
587{
588 b43legacy_debugfs_log_txstat(dev, status);
589
590 if (status->intermediate)
591 return;
592 if (status->for_ampdu)
593 return;
594 if (!status->acked)
595 dev->wl->ieee_stats.dot11ACKFailureCount++;
596 if (status->rts_count) {
597 if (status->rts_count == 0xF) /* FIXME */
598 dev->wl->ieee_stats.dot11RTSFailureCount++;
599 else
600 dev->wl->ieee_stats.dot11RTSSuccessCount++;
601 }
602
603 if (b43legacy_using_pio(dev))
604 b43legacy_pio_handle_txstatus(dev, status);
605 else
606 b43legacy_dma_handle_txstatus(dev, status);
607}
608
609/* Handle TX status report as received through DMA/PIO queues */
610void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
611 const struct b43legacy_hwtxstatus *hw)
612{
613 struct b43legacy_txstatus status;
614 u8 tmp;
615
616 status.cookie = le16_to_cpu(hw->cookie);
617 status.seq = le16_to_cpu(hw->seq);
618 status.phy_stat = hw->phy_stat;
619 tmp = hw->count;
620 status.frame_count = (tmp >> 4);
621 status.rts_count = (tmp & 0x0F);
c6a2afda 622 tmp = hw->flags << 1;
75388acd
LF		 623 status.supp_reason = ((tmp & 0x1C) >> 2);
624 status.pm_indicated = !!(tmp & 0x80);
625 status.intermediate = !!(tmp & 0x40);
626 status.for_ampdu = !!(tmp & 0x20);
627 status.acked = !!(tmp & 0x02);
628
629 b43legacy_handle_txstatus(dev, &status);
630}
631
632/* Stop any TX operation on the device (suspend the hardware queues) */
633void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
634{
635 if (b43legacy_using_pio(dev))
636 b43legacy_pio_freeze_txqueues(dev);
637 else
638 b43legacy_dma_tx_suspend(dev);
639}
640
641/* Resume any TX operation on the device (resume the hardware queues) */
642void b43legacy_tx_resume(struct b43legacy_wldev *dev)
643{
644 if (b43legacy_using_pio(dev))
645 b43legacy_pio_thaw_txqueues(dev);
646 else
647 b43legacy_dma_tx_resume(dev);
648}
649
650/* Initialize the QoS parameters */
651void b43legacy_qos_init(struct b43legacy_wldev *dev)
652{
653 /* FIXME: This function must probably be called from the mac80211
654 * config callback. */
655return;
656
657 b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
658 /* FIXME kill magic */
659 b43legacy_write16(dev, 0x688,
660 b43legacy_read16(dev, 0x688) | 0x4);
661
662
663 /*TODO: We might need some stack support here to get the values. */
664}
Linux 6.x block layer and io_uring tree(s)