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e4d6b795 MB |
1 | /* |
2 | ||
3 | Broadcom B43 wireless driver | |
4 | ||
5 | Transmission (TX/RX) related functions. | |
6 | ||
7 | Copyright (C) 2005 Martin Langer <martin-langer@gmx.de> | |
1f21ad2a | 8 | Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it> |
e4d6b795 MB |
9 | Copyright (C) 2005, 2006 Michael Buesch <mb@bu3sch.de> |
10 | Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org> | |
11 | Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch> | |
12 | ||
13 | This program is free software; you can redistribute it and/or modify | |
14 | it under the terms of the GNU General Public License as published by | |
15 | the Free Software Foundation; either version 2 of the License, or | |
16 | (at your option) any later version. | |
17 | ||
18 | This program is distributed in the hope that it will be useful, | |
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | GNU General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU General Public License | |
24 | along with this program; see the file COPYING. If not, write to | |
25 | the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, | |
26 | Boston, MA 02110-1301, USA. | |
27 | ||
28 | */ | |
29 | ||
30 | #include "xmit.h" | |
31 | #include "phy.h" | |
32 | #include "dma.h" | |
03b29773 | 33 | |
e4d6b795 | 34 | |
8318d78a JB |
35 | /* Extract the bitrate index out of a CCK PLCP header. */ |
36 | static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp) | |
e4d6b795 MB |
37 | { |
38 | switch (plcp->raw[0]) { | |
39 | case 0x0A: | |
8318d78a | 40 | return 0; |
e4d6b795 | 41 | case 0x14: |
8318d78a | 42 | return 1; |
e4d6b795 | 43 | case 0x37: |
8318d78a | 44 | return 2; |
e4d6b795 | 45 | case 0x6E: |
8318d78a | 46 | return 3; |
e4d6b795 MB |
47 | } |
48 | B43_WARN_ON(1); | |
8318d78a | 49 | return -1; |
e4d6b795 MB |
50 | } |
51 | ||
8318d78a JB |
52 | /* Extract the bitrate index out of an OFDM PLCP header. */ |
53 | static u8 b43_plcp_get_bitrate_idx_ofdm(struct b43_plcp_hdr6 *plcp, bool aphy) | |
e4d6b795 | 54 | { |
8318d78a JB |
55 | int base = aphy ? 0 : 4; |
56 | ||
e4d6b795 MB |
57 | switch (plcp->raw[0] & 0xF) { |
58 | case 0xB: | |
8318d78a | 59 | return base + 0; |
e4d6b795 | 60 | case 0xF: |
8318d78a | 61 | return base + 1; |
e4d6b795 | 62 | case 0xA: |
8318d78a | 63 | return base + 2; |
e4d6b795 | 64 | case 0xE: |
8318d78a | 65 | return base + 3; |
e4d6b795 | 66 | case 0x9: |
8318d78a | 67 | return base + 4; |
e4d6b795 | 68 | case 0xD: |
8318d78a | 69 | return base + 5; |
e4d6b795 | 70 | case 0x8: |
8318d78a | 71 | return base + 6; |
e4d6b795 | 72 | case 0xC: |
8318d78a | 73 | return base + 7; |
e4d6b795 MB |
74 | } |
75 | B43_WARN_ON(1); | |
8318d78a | 76 | return -1; |
e4d6b795 MB |
77 | } |
78 | ||
79 | u8 b43_plcp_get_ratecode_cck(const u8 bitrate) | |
80 | { | |
81 | switch (bitrate) { | |
82 | case B43_CCK_RATE_1MB: | |
83 | return 0x0A; | |
84 | case B43_CCK_RATE_2MB: | |
85 | return 0x14; | |
86 | case B43_CCK_RATE_5MB: | |
87 | return 0x37; | |
88 | case B43_CCK_RATE_11MB: | |
89 | return 0x6E; | |
90 | } | |
91 | B43_WARN_ON(1); | |
92 | return 0; | |
93 | } | |
94 | ||
95 | u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate) | |
96 | { | |
97 | switch (bitrate) { | |
98 | case B43_OFDM_RATE_6MB: | |
99 | return 0xB; | |
100 | case B43_OFDM_RATE_9MB: | |
101 | return 0xF; | |
102 | case B43_OFDM_RATE_12MB: | |
103 | return 0xA; | |
104 | case B43_OFDM_RATE_18MB: | |
105 | return 0xE; | |
106 | case B43_OFDM_RATE_24MB: | |
107 | return 0x9; | |
108 | case B43_OFDM_RATE_36MB: | |
109 | return 0xD; | |
110 | case B43_OFDM_RATE_48MB: | |
111 | return 0x8; | |
112 | case B43_OFDM_RATE_54MB: | |
113 | return 0xC; | |
114 | } | |
115 | B43_WARN_ON(1); | |
116 | return 0; | |
117 | } | |
118 | ||
119 | void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp, | |
120 | const u16 octets, const u8 bitrate) | |
121 | { | |
122 | __le32 *data = &(plcp->data); | |
123 | __u8 *raw = plcp->raw; | |
124 | ||
125 | if (b43_is_ofdm_rate(bitrate)) { | |
1a09404a MB |
126 | u32 d; |
127 | ||
128 | d = b43_plcp_get_ratecode_ofdm(bitrate); | |
e4d6b795 | 129 | B43_WARN_ON(octets & 0xF000); |
1a09404a MB |
130 | d |= (octets << 5); |
131 | *data = cpu_to_le32(d); | |
e4d6b795 MB |
132 | } else { |
133 | u32 plen; | |
134 | ||
135 | plen = octets * 16 / bitrate; | |
136 | if ((octets * 16 % bitrate) > 0) { | |
137 | plen++; | |
138 | if ((bitrate == B43_CCK_RATE_11MB) | |
139 | && ((octets * 8 % 11) < 4)) { | |
140 | raw[1] = 0x84; | |
141 | } else | |
142 | raw[1] = 0x04; | |
143 | } else | |
144 | raw[1] = 0x04; | |
145 | *data |= cpu_to_le32(plen << 16); | |
146 | raw[0] = b43_plcp_get_ratecode_cck(bitrate); | |
147 | } | |
148 | } | |
149 | ||
150 | static u8 b43_calc_fallback_rate(u8 bitrate) | |
151 | { | |
152 | switch (bitrate) { | |
153 | case B43_CCK_RATE_1MB: | |
154 | return B43_CCK_RATE_1MB; | |
155 | case B43_CCK_RATE_2MB: | |
156 | return B43_CCK_RATE_1MB; | |
157 | case B43_CCK_RATE_5MB: | |
158 | return B43_CCK_RATE_2MB; | |
159 | case B43_CCK_RATE_11MB: | |
160 | return B43_CCK_RATE_5MB; | |
161 | case B43_OFDM_RATE_6MB: | |
162 | return B43_CCK_RATE_5MB; | |
163 | case B43_OFDM_RATE_9MB: | |
164 | return B43_OFDM_RATE_6MB; | |
165 | case B43_OFDM_RATE_12MB: | |
166 | return B43_OFDM_RATE_9MB; | |
167 | case B43_OFDM_RATE_18MB: | |
168 | return B43_OFDM_RATE_12MB; | |
169 | case B43_OFDM_RATE_24MB: | |
170 | return B43_OFDM_RATE_18MB; | |
171 | case B43_OFDM_RATE_36MB: | |
172 | return B43_OFDM_RATE_24MB; | |
173 | case B43_OFDM_RATE_48MB: | |
174 | return B43_OFDM_RATE_36MB; | |
175 | case B43_OFDM_RATE_54MB: | |
176 | return B43_OFDM_RATE_48MB; | |
177 | } | |
178 | B43_WARN_ON(1); | |
179 | return 0; | |
180 | } | |
181 | ||
eb189d8b | 182 | /* Generate a TX data header. */ |
09552ccd MB |
183 | int b43_generate_txhdr(struct b43_wldev *dev, |
184 | u8 *_txhdr, | |
185 | const unsigned char *fragment_data, | |
186 | unsigned int fragment_len, | |
187 | const struct ieee80211_tx_control *txctl, | |
188 | u16 cookie) | |
e4d6b795 | 189 | { |
eb189d8b | 190 | struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr; |
e4d6b795 MB |
191 | const struct b43_phy *phy = &dev->phy; |
192 | const struct ieee80211_hdr *wlhdr = | |
193 | (const struct ieee80211_hdr *)fragment_data; | |
194 | int use_encryption = (!(txctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)); | |
195 | u16 fctl = le16_to_cpu(wlhdr->frame_control); | |
8318d78a | 196 | struct ieee80211_rate *fbrate; |
e4d6b795 MB |
197 | u8 rate, rate_fb; |
198 | int rate_ofdm, rate_fb_ofdm; | |
199 | unsigned int plcp_fragment_len; | |
200 | u32 mac_ctl = 0; | |
201 | u16 phy_ctl = 0; | |
202 | u8 extra_ft = 0; | |
203 | ||
204 | memset(txhdr, 0, sizeof(*txhdr)); | |
205 | ||
8318d78a JB |
206 | WARN_ON(!txctl->tx_rate); |
207 | rate = txctl->tx_rate ? txctl->tx_rate->hw_value : B43_CCK_RATE_1MB; | |
e4d6b795 | 208 | rate_ofdm = b43_is_ofdm_rate(rate); |
8318d78a JB |
209 | fbrate = txctl->alt_retry_rate ? : txctl->tx_rate; |
210 | rate_fb = fbrate->hw_value; | |
e4d6b795 MB |
211 | rate_fb_ofdm = b43_is_ofdm_rate(rate_fb); |
212 | ||
213 | if (rate_ofdm) | |
214 | txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate); | |
215 | else | |
216 | txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate); | |
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 == 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 { | |
e4d6b795 | 229 | txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw, |
32bfd35d | 230 | txctl->vif, |
e4d6b795 | 231 | fragment_len, |
8318d78a | 232 | fbrate); |
e4d6b795 MB |
233 | } |
234 | ||
235 | plcp_fragment_len = fragment_len + FCS_LEN; | |
236 | if (use_encryption) { | |
237 | u8 key_idx = (u16) (txctl->key_idx); | |
238 | struct b43_key *key; | |
239 | int wlhdr_len; | |
240 | size_t iv_len; | |
241 | ||
242 | B43_WARN_ON(key_idx >= dev->max_nr_keys); | |
243 | key = &(dev->key[key_idx]); | |
7be1bb6b | 244 | |
09552ccd MB |
245 | if (unlikely(!key->keyconf)) { |
246 | /* This key is invalid. This might only happen | |
247 | * in a short timeframe after machine resume before | |
248 | * we were able to reconfigure keys. | |
249 | * Drop this packet completely. Do not transmit it | |
250 | * unencrypted to avoid leaking information. */ | |
251 | return -ENOKEY; | |
7be1bb6b | 252 | } |
09552ccd MB |
253 | |
254 | /* Hardware appends ICV. */ | |
255 | plcp_fragment_len += txctl->icv_len; | |
256 | ||
257 | key_idx = b43_kidx_to_fw(dev, key_idx); | |
258 | mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) & | |
259 | B43_TXH_MAC_KEYIDX; | |
260 | mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) & | |
261 | B43_TXH_MAC_KEYALG; | |
262 | wlhdr_len = ieee80211_get_hdrlen(fctl); | |
263 | iv_len = min((size_t) txctl->iv_len, | |
264 | ARRAY_SIZE(txhdr->iv)); | |
265 | memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len); | |
e4d6b795 | 266 | } |
eb189d8b MB |
267 | if (b43_is_old_txhdr_format(dev)) { |
268 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->old_format.plcp), | |
269 | plcp_fragment_len, rate); | |
270 | } else { | |
271 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->new_format.plcp), | |
272 | plcp_fragment_len, rate); | |
273 | } | |
e4d6b795 MB |
274 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb), |
275 | plcp_fragment_len, rate_fb); | |
276 | ||
277 | /* Extra Frame Types */ | |
278 | if (rate_fb_ofdm) | |
eb189d8b MB |
279 | extra_ft |= B43_TXH_EFT_FB_OFDM; |
280 | else | |
281 | extra_ft |= B43_TXH_EFT_FB_CCK; | |
e4d6b795 MB |
282 | |
283 | /* Set channel radio code. Note that the micrcode ORs 0x100 to | |
284 | * this value before comparing it to the value in SHM, if this | |
285 | * is a 5Ghz packet. | |
286 | */ | |
287 | txhdr->chan_radio_code = phy->channel; | |
288 | ||
289 | /* PHY TX Control word */ | |
290 | if (rate_ofdm) | |
eb189d8b MB |
291 | phy_ctl |= B43_TXH_PHY_ENC_OFDM; |
292 | else | |
293 | phy_ctl |= B43_TXH_PHY_ENC_CCK; | |
8318d78a | 294 | if (txctl->flags & IEEE80211_TXCTL_SHORT_PREAMBLE) |
eb189d8b | 295 | phy_ctl |= B43_TXH_PHY_SHORTPRMBL; |
9db1f6d7 MB |
296 | |
297 | switch (b43_ieee80211_antenna_sanitize(dev, txctl->antenna_sel_tx)) { | |
298 | case 0: /* Default */ | |
eb189d8b | 299 | phy_ctl |= B43_TXH_PHY_ANT01AUTO; |
e4d6b795 | 300 | break; |
9db1f6d7 | 301 | case 1: /* Antenna 0 */ |
eb189d8b | 302 | phy_ctl |= B43_TXH_PHY_ANT0; |
e4d6b795 | 303 | break; |
9db1f6d7 | 304 | case 2: /* Antenna 1 */ |
eb189d8b MB |
305 | phy_ctl |= B43_TXH_PHY_ANT1; |
306 | break; | |
307 | case 3: /* Antenna 2 */ | |
308 | phy_ctl |= B43_TXH_PHY_ANT2; | |
309 | break; | |
310 | case 4: /* Antenna 3 */ | |
311 | phy_ctl |= B43_TXH_PHY_ANT3; | |
e4d6b795 MB |
312 | break; |
313 | default: | |
314 | B43_WARN_ON(1); | |
315 | } | |
316 | ||
317 | /* MAC control */ | |
318 | if (!(txctl->flags & IEEE80211_TXCTL_NO_ACK)) | |
eb189d8b | 319 | mac_ctl |= B43_TXH_MAC_ACK; |
e4d6b795 MB |
320 | if (!(((fctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) && |
321 | ((fctl & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL))) | |
eb189d8b | 322 | mac_ctl |= B43_TXH_MAC_HWSEQ; |
e4d6b795 | 323 | if (txctl->flags & IEEE80211_TXCTL_FIRST_FRAGMENT) |
eb189d8b | 324 | mac_ctl |= B43_TXH_MAC_STMSDU; |
e4d6b795 | 325 | if (phy->type == B43_PHYTYPE_A) |
eb189d8b | 326 | mac_ctl |= B43_TXH_MAC_5GHZ; |
74cfdba7 | 327 | if (txctl->flags & IEEE80211_TXCTL_LONG_RETRY_LIMIT) |
eb189d8b | 328 | mac_ctl |= B43_TXH_MAC_LONGFRAME; |
e4d6b795 MB |
329 | |
330 | /* Generate the RTS or CTS-to-self frame */ | |
331 | if ((txctl->flags & IEEE80211_TXCTL_USE_RTS_CTS) || | |
332 | (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) { | |
333 | unsigned int len; | |
334 | struct ieee80211_hdr *hdr; | |
335 | int rts_rate, rts_rate_fb; | |
336 | int rts_rate_ofdm, rts_rate_fb_ofdm; | |
eb189d8b | 337 | struct b43_plcp_hdr6 *plcp; |
e4d6b795 | 338 | |
8318d78a JB |
339 | WARN_ON(!txctl->rts_cts_rate); |
340 | rts_rate = txctl->rts_cts_rate ? txctl->rts_cts_rate->hw_value : B43_CCK_RATE_1MB; | |
e4d6b795 MB |
341 | rts_rate_ofdm = b43_is_ofdm_rate(rts_rate); |
342 | rts_rate_fb = b43_calc_fallback_rate(rts_rate); | |
343 | rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb); | |
344 | ||
345 | if (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) { | |
eb189d8b MB |
346 | struct ieee80211_cts *cts; |
347 | ||
348 | if (b43_is_old_txhdr_format(dev)) { | |
349 | cts = (struct ieee80211_cts *) | |
350 | (txhdr->old_format.rts_frame); | |
351 | } else { | |
352 | cts = (struct ieee80211_cts *) | |
353 | (txhdr->new_format.rts_frame); | |
354 | } | |
32bfd35d | 355 | ieee80211_ctstoself_get(dev->wl->hw, txctl->vif, |
e4d6b795 | 356 | fragment_data, fragment_len, |
eb189d8b MB |
357 | txctl, cts); |
358 | mac_ctl |= B43_TXH_MAC_SENDCTS; | |
e4d6b795 MB |
359 | len = sizeof(struct ieee80211_cts); |
360 | } else { | |
eb189d8b MB |
361 | struct ieee80211_rts *rts; |
362 | ||
363 | if (b43_is_old_txhdr_format(dev)) { | |
364 | rts = (struct ieee80211_rts *) | |
365 | (txhdr->old_format.rts_frame); | |
366 | } else { | |
367 | rts = (struct ieee80211_rts *) | |
368 | (txhdr->new_format.rts_frame); | |
369 | } | |
32bfd35d | 370 | ieee80211_rts_get(dev->wl->hw, txctl->vif, |
eb189d8b MB |
371 | fragment_data, fragment_len, |
372 | txctl, rts); | |
373 | mac_ctl |= B43_TXH_MAC_SENDRTS; | |
e4d6b795 MB |
374 | len = sizeof(struct ieee80211_rts); |
375 | } | |
376 | len += FCS_LEN; | |
eb189d8b MB |
377 | |
378 | /* Generate the PLCP headers for the RTS/CTS frame */ | |
379 | if (b43_is_old_txhdr_format(dev)) | |
380 | plcp = &txhdr->old_format.rts_plcp; | |
381 | else | |
382 | plcp = &txhdr->new_format.rts_plcp; | |
383 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp, | |
384 | len, rts_rate); | |
385 | plcp = &txhdr->rts_plcp_fb; | |
386 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp, | |
e4d6b795 | 387 | len, rts_rate_fb); |
eb189d8b MB |
388 | |
389 | if (b43_is_old_txhdr_format(dev)) { | |
390 | hdr = (struct ieee80211_hdr *) | |
391 | (&txhdr->old_format.rts_frame); | |
392 | } else { | |
393 | hdr = (struct ieee80211_hdr *) | |
394 | (&txhdr->new_format.rts_frame); | |
395 | } | |
e4d6b795 | 396 | txhdr->rts_dur_fb = hdr->duration_id; |
eb189d8b | 397 | |
e4d6b795 | 398 | if (rts_rate_ofdm) { |
eb189d8b | 399 | extra_ft |= B43_TXH_EFT_RTS_OFDM; |
e4d6b795 MB |
400 | txhdr->phy_rate_rts = |
401 | b43_plcp_get_ratecode_ofdm(rts_rate); | |
eb189d8b MB |
402 | } else { |
403 | extra_ft |= B43_TXH_EFT_RTS_CCK; | |
e4d6b795 MB |
404 | txhdr->phy_rate_rts = |
405 | b43_plcp_get_ratecode_cck(rts_rate); | |
eb189d8b | 406 | } |
e4d6b795 | 407 | if (rts_rate_fb_ofdm) |
eb189d8b MB |
408 | extra_ft |= B43_TXH_EFT_RTSFB_OFDM; |
409 | else | |
410 | extra_ft |= B43_TXH_EFT_RTSFB_CCK; | |
e4d6b795 MB |
411 | } |
412 | ||
413 | /* Magic cookie */ | |
eb189d8b MB |
414 | if (b43_is_old_txhdr_format(dev)) |
415 | txhdr->old_format.cookie = cpu_to_le16(cookie); | |
416 | else | |
417 | txhdr->new_format.cookie = cpu_to_le16(cookie); | |
e4d6b795 MB |
418 | |
419 | /* Apply the bitfields */ | |
420 | txhdr->mac_ctl = cpu_to_le32(mac_ctl); | |
421 | txhdr->phy_ctl = cpu_to_le16(phy_ctl); | |
422 | txhdr->extra_ft = extra_ft; | |
e4d6b795 | 423 | |
09552ccd | 424 | return 0; |
e4d6b795 MB |
425 | } |
426 | ||
427 | static s8 b43_rssi_postprocess(struct b43_wldev *dev, | |
428 | u8 in_rssi, int ofdm, | |
429 | int adjust_2053, int adjust_2050) | |
430 | { | |
431 | struct b43_phy *phy = &dev->phy; | |
432 | s32 tmp; | |
433 | ||
434 | switch (phy->radio_ver) { | |
435 | case 0x2050: | |
436 | if (ofdm) { | |
437 | tmp = in_rssi; | |
438 | if (tmp > 127) | |
439 | tmp -= 256; | |
440 | tmp *= 73; | |
441 | tmp /= 64; | |
442 | if (adjust_2050) | |
443 | tmp += 25; | |
444 | else | |
445 | tmp -= 3; | |
446 | } else { | |
95de2841 | 447 | if (dev->dev->bus->sprom. |
e4d6b795 MB |
448 | boardflags_lo & B43_BFL_RSSI) { |
449 | if (in_rssi > 63) | |
450 | in_rssi = 63; | |
451 | tmp = phy->nrssi_lt[in_rssi]; | |
452 | tmp = 31 - tmp; | |
453 | tmp *= -131; | |
454 | tmp /= 128; | |
455 | tmp -= 57; | |
456 | } else { | |
457 | tmp = in_rssi; | |
458 | tmp = 31 - tmp; | |
459 | tmp *= -149; | |
460 | tmp /= 128; | |
461 | tmp -= 68; | |
462 | } | |
463 | if (phy->type == B43_PHYTYPE_G && adjust_2050) | |
464 | tmp += 25; | |
465 | } | |
466 | break; | |
467 | case 0x2060: | |
468 | if (in_rssi > 127) | |
469 | tmp = in_rssi - 256; | |
470 | else | |
471 | tmp = in_rssi; | |
472 | break; | |
473 | default: | |
474 | tmp = in_rssi; | |
475 | tmp -= 11; | |
476 | tmp *= 103; | |
477 | tmp /= 64; | |
478 | if (adjust_2053) | |
479 | tmp -= 109; | |
480 | else | |
481 | tmp -= 83; | |
482 | } | |
483 | ||
484 | return (s8) tmp; | |
485 | } | |
486 | ||
487 | //TODO | |
488 | #if 0 | |
489 | static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi) | |
490 | { | |
491 | struct b43_phy *phy = &dev->phy; | |
492 | s8 ret; | |
493 | ||
494 | if (phy->type == B43_PHYTYPE_A) { | |
495 | //TODO: Incomplete specs. | |
496 | ret = 0; | |
497 | } else | |
498 | ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1); | |
499 | ||
500 | return ret; | |
501 | } | |
502 | #endif | |
503 | ||
504 | void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr) | |
505 | { | |
506 | struct ieee80211_rx_status status; | |
507 | struct b43_plcp_hdr6 *plcp; | |
508 | struct ieee80211_hdr *wlhdr; | |
509 | const struct b43_rxhdr_fw4 *rxhdr = _rxhdr; | |
510 | u16 fctl; | |
511 | u16 phystat0, phystat3, chanstat, mactime; | |
512 | u32 macstat; | |
513 | u16 chanid; | |
8318d78a | 514 | u16 phytype; |
e4d6b795 MB |
515 | u8 jssi; |
516 | int padding; | |
517 | ||
518 | memset(&status, 0, sizeof(status)); | |
519 | ||
520 | /* Get metadata about the frame from the header. */ | |
521 | phystat0 = le16_to_cpu(rxhdr->phy_status0); | |
522 | phystat3 = le16_to_cpu(rxhdr->phy_status3); | |
523 | jssi = rxhdr->jssi; | |
524 | macstat = le32_to_cpu(rxhdr->mac_status); | |
525 | mactime = le16_to_cpu(rxhdr->mac_time); | |
526 | chanstat = le16_to_cpu(rxhdr->channel); | |
8318d78a | 527 | phytype = chanstat & B43_RX_CHAN_PHYTYPE; |
e4d6b795 MB |
528 | |
529 | if (macstat & B43_RX_MAC_FCSERR) | |
530 | dev->wl->ieee_stats.dot11FCSErrorCount++; | |
531 | if (macstat & B43_RX_MAC_DECERR) { | |
532 | /* Decryption with the given key failed. | |
533 | * Drop the packet. We also won't be able to decrypt it with | |
534 | * the key in software. */ | |
535 | goto drop; | |
536 | } | |
537 | ||
538 | /* Skip PLCP and padding */ | |
539 | padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0; | |
540 | if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) { | |
541 | b43dbg(dev->wl, "RX: Packet size underrun (1)\n"); | |
542 | goto drop; | |
543 | } | |
544 | plcp = (struct b43_plcp_hdr6 *)(skb->data + padding); | |
545 | skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding); | |
546 | /* The skb contains the Wireless Header + payload data now */ | |
547 | if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) { | |
548 | b43dbg(dev->wl, "RX: Packet size underrun (2)\n"); | |
549 | goto drop; | |
550 | } | |
551 | wlhdr = (struct ieee80211_hdr *)(skb->data); | |
552 | fctl = le16_to_cpu(wlhdr->frame_control); | |
e4d6b795 MB |
553 | |
554 | if (macstat & B43_RX_MAC_DEC) { | |
555 | unsigned int keyidx; | |
556 | int wlhdr_len; | |
557 | ||
558 | keyidx = ((macstat & B43_RX_MAC_KEYIDX) | |
559 | >> B43_RX_MAC_KEYIDX_SHIFT); | |
560 | /* We must adjust the key index here. We want the "physical" | |
561 | * key index, but the ucode passed it slightly different. | |
562 | */ | |
563 | keyidx = b43_kidx_to_raw(dev, keyidx); | |
564 | B43_WARN_ON(keyidx >= dev->max_nr_keys); | |
565 | ||
566 | if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) { | |
567 | wlhdr_len = ieee80211_get_hdrlen(fctl); | |
568 | if (unlikely(skb->len < (wlhdr_len + 3))) { | |
569 | b43dbg(dev->wl, | |
570 | "RX: Packet size underrun (3)\n"); | |
571 | goto drop; | |
572 | } | |
573 | status.flag |= RX_FLAG_DECRYPTED; | |
574 | } | |
575 | } | |
576 | ||
577 | status.ssi = b43_rssi_postprocess(dev, jssi, | |
578 | (phystat0 & B43_RX_PHYST0_OFDM), | |
579 | (phystat0 & B43_RX_PHYST0_GAINCTL), | |
580 | (phystat3 & B43_RX_PHYST3_TRSTATE)); | |
581 | status.noise = dev->stats.link_noise; | |
582 | /* the next line looks wrong, but is what mac80211 wants */ | |
583 | status.signal = (jssi * 100) / B43_RX_MAX_SSI; | |
584 | if (phystat0 & B43_RX_PHYST0_OFDM) | |
8318d78a JB |
585 | status.rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp, |
586 | phytype == B43_PHYTYPE_A); | |
e4d6b795 | 587 | else |
8318d78a | 588 | status.rate_idx = b43_plcp_get_bitrate_idx_cck(plcp); |
e4d6b795 | 589 | status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT); |
c0ddd04d JL |
590 | |
591 | /* | |
592 | * If monitors are present get full 64-bit timestamp. This | |
593 | * code assumes we get to process the packet within 16 bits | |
594 | * of timestamp, i.e. about 65 milliseconds after the PHY | |
595 | * received the first symbol. | |
596 | */ | |
597 | if (dev->wl->radiotap_enabled) { | |
598 | u16 low_mactime_now; | |
599 | ||
600 | b43_tsf_read(dev, &status.mactime); | |
601 | low_mactime_now = status.mactime; | |
602 | status.mactime = status.mactime & ~0xFFFFULL; | |
603 | status.mactime += mactime; | |
604 | if (low_mactime_now <= mactime) | |
605 | status.mactime -= 0x10000; | |
606 | status.flag |= RX_FLAG_TSFT; | |
607 | } | |
e4d6b795 MB |
608 | |
609 | chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT; | |
610 | switch (chanstat & B43_RX_CHAN_PHYTYPE) { | |
611 | case B43_PHYTYPE_A: | |
8318d78a | 612 | status.band = IEEE80211_BAND_5GHZ; |
d987160b MB |
613 | B43_WARN_ON(1); |
614 | /* FIXME: We don't really know which value the "chanid" contains. | |
615 | * So the following assignment might be wrong. */ | |
8318d78a | 616 | status.freq = b43_channel_to_freq_5ghz(chanid); |
e4d6b795 MB |
617 | break; |
618 | case B43_PHYTYPE_G: | |
8318d78a | 619 | status.band = IEEE80211_BAND_2GHZ; |
d987160b MB |
620 | /* chanid is the radio channel cookie value as used |
621 | * to tune the radio. */ | |
e4d6b795 | 622 | status.freq = chanid + 2400; |
d987160b MB |
623 | break; |
624 | case B43_PHYTYPE_N: | |
d987160b MB |
625 | /* chanid is the SHM channel cookie. Which is the plain |
626 | * channel number in b43. */ | |
8318d78a JB |
627 | if (chanstat & B43_RX_CHAN_5GHZ) { |
628 | status.band = IEEE80211_BAND_5GHZ; | |
629 | status.freq = b43_freq_to_channel_5ghz(chanid); | |
630 | } else { | |
631 | status.band = IEEE80211_BAND_2GHZ; | |
632 | status.freq = b43_freq_to_channel_2ghz(chanid); | |
633 | } | |
e4d6b795 MB |
634 | break; |
635 | default: | |
636 | B43_WARN_ON(1); | |
d987160b | 637 | goto drop; |
e4d6b795 MB |
638 | } |
639 | ||
640 | dev->stats.last_rx = jiffies; | |
641 | ieee80211_rx_irqsafe(dev->wl->hw, skb, &status); | |
642 | ||
643 | return; | |
644 | drop: | |
645 | b43dbg(dev->wl, "RX: Packet dropped\n"); | |
646 | dev_kfree_skb_any(skb); | |
647 | } | |
648 | ||
649 | void b43_handle_txstatus(struct b43_wldev *dev, | |
650 | const struct b43_txstatus *status) | |
651 | { | |
652 | b43_debugfs_log_txstat(dev, status); | |
653 | ||
654 | if (status->intermediate) | |
655 | return; | |
656 | if (status->for_ampdu) | |
657 | return; | |
658 | if (!status->acked) | |
659 | dev->wl->ieee_stats.dot11ACKFailureCount++; | |
660 | if (status->rts_count) { | |
661 | if (status->rts_count == 0xF) //FIXME | |
662 | dev->wl->ieee_stats.dot11RTSFailureCount++; | |
663 | else | |
664 | dev->wl->ieee_stats.dot11RTSSuccessCount++; | |
665 | } | |
666 | ||
03b29773 | 667 | b43_dma_handle_txstatus(dev, status); |
e4d6b795 MB |
668 | } |
669 | ||
670 | /* Handle TX status report as received through DMA/PIO queues */ | |
671 | void b43_handle_hwtxstatus(struct b43_wldev *dev, | |
672 | const struct b43_hwtxstatus *hw) | |
673 | { | |
674 | struct b43_txstatus status; | |
675 | u8 tmp; | |
676 | ||
677 | status.cookie = le16_to_cpu(hw->cookie); | |
678 | status.seq = le16_to_cpu(hw->seq); | |
679 | status.phy_stat = hw->phy_stat; | |
680 | tmp = hw->count; | |
681 | status.frame_count = (tmp >> 4); | |
682 | status.rts_count = (tmp & 0x0F); | |
683 | tmp = hw->flags; | |
684 | status.supp_reason = ((tmp & 0x1C) >> 2); | |
685 | status.pm_indicated = !!(tmp & 0x80); | |
686 | status.intermediate = !!(tmp & 0x40); | |
687 | status.for_ampdu = !!(tmp & 0x20); | |
688 | status.acked = !!(tmp & 0x02); | |
689 | ||
690 | b43_handle_txstatus(dev, &status); | |
691 | } | |
692 | ||
693 | /* Stop any TX operation on the device (suspend the hardware queues) */ | |
694 | void b43_tx_suspend(struct b43_wldev *dev) | |
695 | { | |
03b29773 | 696 | b43_dma_tx_suspend(dev); |
e4d6b795 MB |
697 | } |
698 | ||
699 | /* Resume any TX operation on the device (resume the hardware queues) */ | |
700 | void b43_tx_resume(struct b43_wldev *dev) | |
701 | { | |
03b29773 | 702 | b43_dma_tx_resume(dev); |
e4d6b795 MB |
703 | } |
704 | ||
705 | #if 0 | |
706 | static void upload_qos_parms(struct b43_wldev *dev, | |
707 | const u16 * parms, u16 offset) | |
708 | { | |
709 | int i; | |
710 | ||
711 | for (i = 0; i < B43_NR_QOSPARMS; i++) { | |
712 | b43_shm_write16(dev, B43_SHM_SHARED, | |
713 | offset + (i * 2), parms[i]); | |
714 | } | |
715 | } | |
716 | #endif | |
717 | ||
718 | /* Initialize the QoS parameters */ | |
719 | void b43_qos_init(struct b43_wldev *dev) | |
720 | { | |
721 | /* FIXME: This function must probably be called from the mac80211 | |
722 | * config callback. */ | |
723 | return; | |
724 | ||
725 | b43_hf_write(dev, b43_hf_read(dev) | B43_HF_EDCF); | |
726 | //FIXME kill magic | |
727 | b43_write16(dev, 0x688, b43_read16(dev, 0x688) | 0x4); | |
728 | ||
729 | /*TODO: We might need some stack support here to get the values. */ | |
730 | } |