Commit | Line | Data |
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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> |
75388acd LF |
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_cck(struct b43legacy_plcp_hdr6 *plcp) | |
41 | { | |
42 | switch (plcp->raw[0]) { | |
43 | case 0x0A: | |
44 | return B43legacy_CCK_RATE_1MB; | |
45 | case 0x14: | |
46 | return B43legacy_CCK_RATE_2MB; | |
47 | case 0x37: | |
48 | return B43legacy_CCK_RATE_5MB; | |
49 | case 0x6E: | |
50 | return B43legacy_CCK_RATE_11MB; | |
51 | } | |
52 | B43legacy_BUG_ON(1); | |
53 | return 0; | |
54 | } | |
55 | ||
56 | /* Extract the bitrate out of an OFDM PLCP header. */ | |
57 | static u8 b43legacy_plcp_get_bitrate_ofdm(struct b43legacy_plcp_hdr6 *plcp) | |
58 | { | |
59 | switch (plcp->raw[0] & 0xF) { | |
60 | case 0xB: | |
61 | return B43legacy_OFDM_RATE_6MB; | |
62 | case 0xF: | |
63 | return B43legacy_OFDM_RATE_9MB; | |
64 | case 0xA: | |
65 | return B43legacy_OFDM_RATE_12MB; | |
66 | case 0xE: | |
67 | return B43legacy_OFDM_RATE_18MB; | |
68 | case 0x9: | |
69 | return B43legacy_OFDM_RATE_24MB; | |
70 | case 0xD: | |
71 | return B43legacy_OFDM_RATE_36MB; | |
72 | case 0x8: | |
73 | return B43legacy_OFDM_RATE_48MB; | |
74 | case 0xC: | |
75 | return B43legacy_OFDM_RATE_54MB; | |
76 | } | |
77 | B43legacy_BUG_ON(1); | |
78 | return 0; | |
79 | } | |
80 | ||
81 | u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate) | |
82 | { | |
83 | switch (bitrate) { | |
84 | case B43legacy_CCK_RATE_1MB: | |
85 | return 0x0A; | |
86 | case B43legacy_CCK_RATE_2MB: | |
87 | return 0x14; | |
88 | case B43legacy_CCK_RATE_5MB: | |
89 | return 0x37; | |
90 | case B43legacy_CCK_RATE_11MB: | |
91 | return 0x6E; | |
92 | } | |
93 | B43legacy_BUG_ON(1); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate) | |
98 | { | |
99 | switch (bitrate) { | |
100 | case B43legacy_OFDM_RATE_6MB: | |
101 | return 0xB; | |
102 | case B43legacy_OFDM_RATE_9MB: | |
103 | return 0xF; | |
104 | case B43legacy_OFDM_RATE_12MB: | |
105 | return 0xA; | |
106 | case B43legacy_OFDM_RATE_18MB: | |
107 | return 0xE; | |
108 | case B43legacy_OFDM_RATE_24MB: | |
109 | return 0x9; | |
110 | case B43legacy_OFDM_RATE_36MB: | |
111 | return 0xD; | |
112 | case B43legacy_OFDM_RATE_48MB: | |
113 | return 0x8; | |
114 | case B43legacy_OFDM_RATE_54MB: | |
115 | return 0xC; | |
116 | } | |
117 | B43legacy_BUG_ON(1); | |
118 | return 0; | |
119 | } | |
120 | ||
121 | void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp, | |
122 | const u16 octets, const u8 bitrate) | |
123 | { | |
124 | __le32 *data = &(plcp->data); | |
125 | __u8 *raw = plcp->raw; | |
126 | ||
127 | if (b43legacy_is_ofdm_rate(bitrate)) { | |
128 | u16 d; | |
129 | ||
130 | d = b43legacy_plcp_get_ratecode_ofdm(bitrate); | |
131 | B43legacy_WARN_ON(octets & 0xF000); | |
132 | d |= (octets << 5); | |
133 | *data = cpu_to_le32(d); | |
134 | } else { | |
135 | u32 plen; | |
136 | ||
137 | plen = octets * 16 / bitrate; | |
138 | if ((octets * 16 % bitrate) > 0) { | |
139 | plen++; | |
140 | if ((bitrate == B43legacy_CCK_RATE_11MB) | |
141 | && ((octets * 8 % 11) < 4)) | |
142 | raw[1] = 0x84; | |
143 | else | |
144 | raw[1] = 0x04; | |
145 | } else | |
146 | raw[1] = 0x04; | |
147 | *data |= cpu_to_le32(plen << 16); | |
148 | raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate); | |
149 | } | |
150 | } | |
151 | ||
152 | static u8 b43legacy_calc_fallback_rate(u8 bitrate) | |
153 | { | |
154 | switch (bitrate) { | |
155 | case B43legacy_CCK_RATE_1MB: | |
156 | return B43legacy_CCK_RATE_1MB; | |
157 | case B43legacy_CCK_RATE_2MB: | |
158 | return B43legacy_CCK_RATE_1MB; | |
159 | case B43legacy_CCK_RATE_5MB: | |
160 | return B43legacy_CCK_RATE_2MB; | |
161 | case B43legacy_CCK_RATE_11MB: | |
162 | return B43legacy_CCK_RATE_5MB; | |
163 | case B43legacy_OFDM_RATE_6MB: | |
164 | return B43legacy_CCK_RATE_5MB; | |
165 | case B43legacy_OFDM_RATE_9MB: | |
166 | return B43legacy_OFDM_RATE_6MB; | |
167 | case B43legacy_OFDM_RATE_12MB: | |
168 | return B43legacy_OFDM_RATE_9MB; | |
169 | case B43legacy_OFDM_RATE_18MB: | |
170 | return B43legacy_OFDM_RATE_12MB; | |
171 | case B43legacy_OFDM_RATE_24MB: | |
172 | return B43legacy_OFDM_RATE_18MB; | |
173 | case B43legacy_OFDM_RATE_36MB: | |
174 | return B43legacy_OFDM_RATE_24MB; | |
175 | case B43legacy_OFDM_RATE_48MB: | |
176 | return B43legacy_OFDM_RATE_36MB; | |
177 | case B43legacy_OFDM_RATE_54MB: | |
178 | return B43legacy_OFDM_RATE_48MB; | |
179 | } | |
180 | B43legacy_BUG_ON(1); | |
181 | return 0; | |
182 | } | |
183 | ||
9eca9a8e | 184 | static int generate_txhdr_fw3(struct b43legacy_wldev *dev, |
75388acd LF |
185 | struct b43legacy_txhdr_fw3 *txhdr, |
186 | const unsigned char *fragment_data, | |
187 | unsigned int fragment_len, | |
188 | const struct ieee80211_tx_control *txctl, | |
189 | u16 cookie) | |
190 | { | |
191 | const struct ieee80211_hdr *wlhdr; | |
192 | int use_encryption = (!(txctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)); | |
193 | u16 fctl; | |
194 | u8 rate; | |
195 | u8 rate_fb; | |
196 | int rate_ofdm; | |
197 | int rate_fb_ofdm; | |
198 | unsigned int plcp_fragment_len; | |
199 | u32 mac_ctl = 0; | |
200 | u16 phy_ctl = 0; | |
201 | ||
202 | wlhdr = (const struct ieee80211_hdr *)fragment_data; | |
203 | fctl = le16_to_cpu(wlhdr->frame_control); | |
204 | ||
205 | memset(txhdr, 0, sizeof(*txhdr)); | |
206 | ||
207 | rate = txctl->tx_rate; | |
208 | rate_ofdm = b43legacy_is_ofdm_rate(rate); | |
209 | rate_fb = (txctl->alt_retry_rate == -1) ? rate : txctl->alt_retry_rate; | |
210 | rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb); | |
211 | ||
212 | txhdr->mac_frame_ctl = wlhdr->frame_control; | |
213 | memcpy(txhdr->tx_receiver, wlhdr->addr1, 6); | |
214 | ||
215 | /* Calculate duration for fallback rate */ | |
216 | if ((rate_fb == rate) || | |
217 | (wlhdr->duration_id & cpu_to_le16(0x8000)) || | |
218 | (wlhdr->duration_id == cpu_to_le16(0))) { | |
219 | /* If the fallback rate equals the normal rate or the | |
220 | * dur_id field contains an AID, CFP magic or 0, | |
221 | * use the original dur_id field. */ | |
222 | txhdr->dur_fb = wlhdr->duration_id; | |
223 | } else { | |
224 | int fbrate_base100kbps = B43legacy_RATE_TO_100KBPS(rate_fb); | |
225 | txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw, | |
32bfd35d | 226 | txctl->vif, |
75388acd LF |
227 | fragment_len, |
228 | fbrate_base100kbps); | |
229 | } | |
230 | ||
231 | plcp_fragment_len = fragment_len + FCS_LEN; | |
232 | if (use_encryption) { | |
233 | u8 key_idx = (u16)(txctl->key_idx); | |
234 | struct b43legacy_key *key; | |
235 | int wlhdr_len; | |
236 | size_t iv_len; | |
237 | ||
238 | B43legacy_WARN_ON(key_idx >= dev->max_nr_keys); | |
239 | key = &(dev->key[key_idx]); | |
240 | ||
241 | if (key->enabled) { | |
242 | /* Hardware appends ICV. */ | |
243 | plcp_fragment_len += txctl->icv_len; | |
244 | ||
245 | key_idx = b43legacy_kidx_to_fw(dev, key_idx); | |
246 | mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) & | |
247 | B43legacy_TX4_MAC_KEYIDX; | |
248 | mac_ctl |= (key->algorithm << | |
249 | B43legacy_TX4_MAC_KEYALG_SHIFT) & | |
250 | B43legacy_TX4_MAC_KEYALG; | |
251 | wlhdr_len = ieee80211_get_hdrlen(fctl); | |
252 | iv_len = min((size_t)txctl->iv_len, | |
253 | ARRAY_SIZE(txhdr->iv)); | |
254 | memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len); | |
9eca9a8e SB |
255 | } else { |
256 | /* This key is invalid. This might only happen | |
257 | * in a short timeframe after machine resume before | |
258 | * we were able to reconfigure keys. | |
259 | * Drop this packet completely. Do not transmit it | |
260 | * unencrypted to avoid leaking information. */ | |
261 | return -ENOKEY; | |
75388acd LF |
262 | } |
263 | } | |
264 | b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *) | |
265 | (&txhdr->plcp), plcp_fragment_len, | |
266 | rate); | |
267 | b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *) | |
268 | (&txhdr->plcp_fb), plcp_fragment_len, | |
269 | rate_fb); | |
270 | ||
271 | /* PHY TX Control word */ | |
272 | if (rate_ofdm) | |
273 | phy_ctl |= B43legacy_TX4_PHY_OFDM; | |
274 | if (dev->short_preamble) | |
275 | phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL; | |
276 | switch (txctl->antenna_sel_tx) { | |
277 | case 0: | |
278 | phy_ctl |= B43legacy_TX4_PHY_ANTLAST; | |
279 | break; | |
280 | case 1: | |
281 | phy_ctl |= B43legacy_TX4_PHY_ANT0; | |
282 | break; | |
283 | case 2: | |
284 | phy_ctl |= B43legacy_TX4_PHY_ANT1; | |
285 | break; | |
286 | default: | |
287 | B43legacy_BUG_ON(1); | |
288 | } | |
289 | ||
290 | /* MAC control */ | |
291 | if (!(txctl->flags & IEEE80211_TXCTL_NO_ACK)) | |
292 | mac_ctl |= B43legacy_TX4_MAC_ACK; | |
293 | if (!(((fctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) && | |
294 | ((fctl & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL))) | |
295 | mac_ctl |= B43legacy_TX4_MAC_HWSEQ; | |
296 | if (txctl->flags & IEEE80211_TXCTL_FIRST_FRAGMENT) | |
297 | mac_ctl |= B43legacy_TX4_MAC_STMSDU; | |
298 | if (rate_fb_ofdm) | |
299 | mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM; | |
0a6e1bee SB |
300 | if (txctl->flags & IEEE80211_TXCTL_LONG_RETRY_LIMIT) |
301 | mac_ctl |= B43legacy_TX4_MAC_LONGFRAME; | |
75388acd LF |
302 | |
303 | /* Generate the RTS or CTS-to-self frame */ | |
304 | if ((txctl->flags & IEEE80211_TXCTL_USE_RTS_CTS) || | |
305 | (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) { | |
306 | unsigned int len; | |
307 | struct ieee80211_hdr *hdr; | |
308 | int rts_rate; | |
309 | int rts_rate_fb; | |
310 | int rts_rate_ofdm; | |
311 | int rts_rate_fb_ofdm; | |
312 | ||
313 | rts_rate = txctl->rts_cts_rate; | |
314 | rts_rate_ofdm = b43legacy_is_ofdm_rate(rts_rate); | |
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 | ||
320 | if (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) { | |
321 | ieee80211_ctstoself_get(dev->wl->hw, | |
32bfd35d | 322 | txctl->vif, |
75388acd LF |
323 | fragment_data, |
324 | fragment_len, txctl, | |
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, | |
32bfd35d | 331 | txctl->vif, |
75388acd LF |
332 | fragment_data, fragment_len, txctl, |
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); | |
342 | b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *) | |
343 | (&txhdr->rts_plcp_fb), | |
344 | len, rts_rate_fb); | |
345 | hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame); | |
346 | txhdr->rts_dur_fb = hdr->duration_id; | |
75388acd LF |
347 | } |
348 | ||
349 | /* Magic cookie */ | |
350 | txhdr->cookie = cpu_to_le16(cookie); | |
351 | ||
352 | /* Apply the bitfields */ | |
353 | txhdr->mac_ctl = cpu_to_le32(mac_ctl); | |
354 | txhdr->phy_ctl = cpu_to_le16(phy_ctl); | |
9eca9a8e SB |
355 | |
356 | return 0; | |
75388acd LF |
357 | } |
358 | ||
9eca9a8e | 359 | int b43legacy_generate_txhdr(struct b43legacy_wldev *dev, |
75388acd LF |
360 | u8 *txhdr, |
361 | const unsigned char *fragment_data, | |
362 | unsigned int fragment_len, | |
363 | const struct ieee80211_tx_control *txctl, | |
364 | u16 cookie) | |
365 | { | |
9eca9a8e | 366 | return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr, |
75388acd LF |
367 | fragment_data, fragment_len, |
368 | txctl, cookie); | |
369 | } | |
370 | ||
371 | static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev, | |
372 | u8 in_rssi, int ofdm, | |
373 | int adjust_2053, int adjust_2050) | |
374 | { | |
375 | struct b43legacy_phy *phy = &dev->phy; | |
376 | s32 tmp; | |
377 | ||
378 | switch (phy->radio_ver) { | |
379 | case 0x2050: | |
380 | if (ofdm) { | |
381 | tmp = in_rssi; | |
382 | if (tmp > 127) | |
383 | tmp -= 256; | |
384 | tmp *= 73; | |
385 | tmp /= 64; | |
386 | if (adjust_2050) | |
387 | tmp += 25; | |
388 | else | |
389 | tmp -= 3; | |
390 | } else { | |
7797aa38 | 391 | if (dev->dev->bus->sprom.boardflags_lo |
75388acd LF |
392 | & B43legacy_BFL_RSSI) { |
393 | if (in_rssi > 63) | |
394 | in_rssi = 63; | |
395 | tmp = phy->nrssi_lt[in_rssi]; | |
396 | tmp = 31 - tmp; | |
397 | tmp *= -131; | |
398 | tmp /= 128; | |
399 | tmp -= 57; | |
400 | } else { | |
401 | tmp = in_rssi; | |
402 | tmp = 31 - tmp; | |
403 | tmp *= -149; | |
404 | tmp /= 128; | |
405 | tmp -= 68; | |
406 | } | |
407 | if (phy->type == B43legacy_PHYTYPE_G && | |
408 | adjust_2050) | |
409 | tmp += 25; | |
410 | } | |
411 | break; | |
412 | case 0x2060: | |
413 | if (in_rssi > 127) | |
414 | tmp = in_rssi - 256; | |
415 | else | |
416 | tmp = in_rssi; | |
417 | break; | |
418 | default: | |
419 | tmp = in_rssi; | |
420 | tmp -= 11; | |
421 | tmp *= 103; | |
422 | tmp /= 64; | |
423 | if (adjust_2053) | |
424 | tmp -= 109; | |
425 | else | |
426 | tmp -= 83; | |
427 | } | |
428 | ||
429 | return (s8)tmp; | |
430 | } | |
431 | ||
432 | void b43legacy_rx(struct b43legacy_wldev *dev, | |
433 | struct sk_buff *skb, | |
434 | const void *_rxhdr) | |
435 | { | |
436 | struct ieee80211_rx_status status; | |
437 | struct b43legacy_plcp_hdr6 *plcp; | |
438 | struct ieee80211_hdr *wlhdr; | |
439 | const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr; | |
440 | u16 fctl; | |
441 | u16 phystat0; | |
442 | u16 phystat3; | |
443 | u16 chanstat; | |
444 | u16 mactime; | |
445 | u32 macstat; | |
446 | u16 chanid; | |
447 | u8 jssi; | |
448 | int padding; | |
449 | ||
450 | memset(&status, 0, sizeof(status)); | |
451 | ||
452 | /* Get metadata about the frame from the header. */ | |
453 | phystat0 = le16_to_cpu(rxhdr->phy_status0); | |
454 | phystat3 = le16_to_cpu(rxhdr->phy_status3); | |
455 | jssi = rxhdr->jssi; | |
456 | macstat = le16_to_cpu(rxhdr->mac_status); | |
457 | mactime = le16_to_cpu(rxhdr->mac_time); | |
458 | chanstat = le16_to_cpu(rxhdr->channel); | |
459 | ||
460 | if (macstat & B43legacy_RX_MAC_FCSERR) | |
461 | dev->wl->ieee_stats.dot11FCSErrorCount++; | |
462 | ||
463 | /* Skip PLCP and padding */ | |
464 | padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0; | |
465 | if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) + | |
466 | padding))) { | |
467 | b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n"); | |
468 | goto drop; | |
469 | } | |
470 | plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding); | |
471 | skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding); | |
472 | /* The skb contains the Wireless Header + payload data now */ | |
473 | if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) { | |
474 | b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n"); | |
475 | goto drop; | |
476 | } | |
477 | wlhdr = (struct ieee80211_hdr *)(skb->data); | |
478 | fctl = le16_to_cpu(wlhdr->frame_control); | |
479 | ||
480 | if ((macstat & B43legacy_RX_MAC_DEC) && | |
481 | !(macstat & B43legacy_RX_MAC_DECERR)) { | |
482 | unsigned int keyidx; | |
483 | int wlhdr_len; | |
484 | int iv_len; | |
485 | int icv_len; | |
486 | ||
487 | keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX) | |
488 | >> B43legacy_RX_MAC_KEYIDX_SHIFT); | |
489 | /* We must adjust the key index here. We want the "physical" | |
490 | * key index, but the ucode passed it slightly different. | |
491 | */ | |
492 | keyidx = b43legacy_kidx_to_raw(dev, keyidx); | |
493 | B43legacy_WARN_ON(keyidx >= dev->max_nr_keys); | |
494 | ||
495 | if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) { | |
496 | /* Remove PROTECTED flag to mark it as decrypted. */ | |
497 | B43legacy_WARN_ON(!(fctl & IEEE80211_FCTL_PROTECTED)); | |
498 | fctl &= ~IEEE80211_FCTL_PROTECTED; | |
499 | wlhdr->frame_control = cpu_to_le16(fctl); | |
500 | ||
501 | wlhdr_len = ieee80211_get_hdrlen(fctl); | |
502 | if (unlikely(skb->len < (wlhdr_len + 3))) { | |
503 | b43legacydbg(dev->wl, "RX: Packet size" | |
504 | " underrun3\n"); | |
505 | goto drop; | |
506 | } | |
507 | if (skb->data[wlhdr_len + 3] & (1 << 5)) { | |
508 | /* The Ext-IV Bit is set in the "KeyID" | |
509 | * octet of the IV. | |
510 | */ | |
511 | iv_len = 8; | |
512 | icv_len = 8; | |
513 | } else { | |
514 | iv_len = 4; | |
515 | icv_len = 4; | |
516 | } | |
517 | if (unlikely(skb->len < (wlhdr_len + iv_len + | |
518 | icv_len))) { | |
519 | b43legacydbg(dev->wl, "RX: Packet size" | |
520 | " underrun4\n"); | |
521 | goto drop; | |
522 | } | |
523 | /* Remove the IV */ | |
524 | memmove(skb->data + iv_len, skb->data, wlhdr_len); | |
525 | skb_pull(skb, iv_len); | |
526 | /* Remove the ICV */ | |
527 | skb_trim(skb, skb->len - icv_len); | |
528 | ||
529 | status.flag |= RX_FLAG_DECRYPTED; | |
530 | } | |
531 | } | |
532 | ||
533 | status.ssi = b43legacy_rssi_postprocess(dev, jssi, | |
534 | (phystat0 & B43legacy_RX_PHYST0_OFDM), | |
535 | (phystat0 & B43legacy_RX_PHYST0_GAINCTL), | |
536 | (phystat3 & B43legacy_RX_PHYST3_TRSTATE)); | |
537 | status.noise = dev->stats.link_noise; | |
538 | status.signal = (jssi * 100) / B43legacy_RX_MAX_SSI; | |
539 | if (phystat0 & B43legacy_RX_PHYST0_OFDM) | |
540 | status.rate = b43legacy_plcp_get_bitrate_ofdm(plcp); | |
541 | else | |
542 | status.rate = b43legacy_plcp_get_bitrate_cck(plcp); | |
543 | status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT); | |
c0ddd04d JL |
544 | |
545 | /* | |
546 | * If monitors are present get full 64-bit timestamp. This | |
547 | * code assumes we get to process the packet within 16 bits | |
548 | * of timestamp, i.e. about 65 milliseconds after the PHY | |
549 | * received the first symbol. | |
550 | */ | |
551 | if (dev->wl->radiotap_enabled) { | |
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; | |
560 | status.flag |= RX_FLAG_TSFT; | |
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: | |
567 | status.phymode = MODE_IEEE80211B; | |
568 | status.freq = chanid + 2400; | |
569 | status.channel = b43legacy_freq_to_channel_bg(chanid + 2400); | |
570 | break; | |
571 | case B43legacy_PHYTYPE_G: | |
572 | status.phymode = MODE_IEEE80211G; | |
573 | status.freq = chanid + 2400; | |
574 | status.channel = b43legacy_freq_to_channel_bg(chanid + 2400); | |
575 | break; | |
576 | default: | |
577 | b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n", | |
578 | chanstat); | |
579 | } | |
580 | ||
581 | dev->stats.last_rx = jiffies; | |
582 | ieee80211_rx_irqsafe(dev->wl->hw, skb, &status); | |
583 | ||
584 | return; | |
585 | drop: | |
586 | b43legacydbg(dev->wl, "RX: Packet dropped\n"); | |
587 | dev_kfree_skb_any(skb); | |
588 | } | |
589 | ||
590 | void b43legacy_handle_txstatus(struct b43legacy_wldev *dev, | |
591 | const struct b43legacy_txstatus *status) | |
592 | { | |
593 | b43legacy_debugfs_log_txstat(dev, status); | |
594 | ||
595 | if (status->intermediate) | |
596 | return; | |
597 | if (status->for_ampdu) | |
598 | return; | |
599 | if (!status->acked) | |
600 | dev->wl->ieee_stats.dot11ACKFailureCount++; | |
601 | if (status->rts_count) { | |
602 | if (status->rts_count == 0xF) /* FIXME */ | |
603 | dev->wl->ieee_stats.dot11RTSFailureCount++; | |
604 | else | |
605 | dev->wl->ieee_stats.dot11RTSSuccessCount++; | |
606 | } | |
607 | ||
608 | if (b43legacy_using_pio(dev)) | |
609 | b43legacy_pio_handle_txstatus(dev, status); | |
610 | else | |
611 | b43legacy_dma_handle_txstatus(dev, status); | |
612 | } | |
613 | ||
614 | /* Handle TX status report as received through DMA/PIO queues */ | |
615 | void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev, | |
616 | const struct b43legacy_hwtxstatus *hw) | |
617 | { | |
618 | struct b43legacy_txstatus status; | |
619 | u8 tmp; | |
620 | ||
621 | status.cookie = le16_to_cpu(hw->cookie); | |
622 | status.seq = le16_to_cpu(hw->seq); | |
623 | status.phy_stat = hw->phy_stat; | |
624 | tmp = hw->count; | |
625 | status.frame_count = (tmp >> 4); | |
626 | status.rts_count = (tmp & 0x0F); | |
627 | tmp = hw->flags; | |
628 | status.supp_reason = ((tmp & 0x1C) >> 2); | |
629 | status.pm_indicated = !!(tmp & 0x80); | |
630 | status.intermediate = !!(tmp & 0x40); | |
631 | status.for_ampdu = !!(tmp & 0x20); | |
632 | status.acked = !!(tmp & 0x02); | |
633 | ||
634 | b43legacy_handle_txstatus(dev, &status); | |
635 | } | |
636 | ||
637 | /* Stop any TX operation on the device (suspend the hardware queues) */ | |
638 | void b43legacy_tx_suspend(struct b43legacy_wldev *dev) | |
639 | { | |
640 | if (b43legacy_using_pio(dev)) | |
641 | b43legacy_pio_freeze_txqueues(dev); | |
642 | else | |
643 | b43legacy_dma_tx_suspend(dev); | |
644 | } | |
645 | ||
646 | /* Resume any TX operation on the device (resume the hardware queues) */ | |
647 | void b43legacy_tx_resume(struct b43legacy_wldev *dev) | |
648 | { | |
649 | if (b43legacy_using_pio(dev)) | |
650 | b43legacy_pio_thaw_txqueues(dev); | |
651 | else | |
652 | b43legacy_dma_tx_resume(dev); | |
653 | } | |
654 | ||
655 | /* Initialize the QoS parameters */ | |
656 | void b43legacy_qos_init(struct b43legacy_wldev *dev) | |
657 | { | |
658 | /* FIXME: This function must probably be called from the mac80211 | |
659 | * config callback. */ | |
660 | return; | |
661 | ||
662 | b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF); | |
663 | /* FIXME kill magic */ | |
664 | b43legacy_write16(dev, 0x688, | |
665 | b43legacy_read16(dev, 0x688) | 0x4); | |
666 | ||
667 | ||
668 | /*TODO: We might need some stack support here to get the values. */ | |
669 | } |