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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" | |
ef1a628d | 31 | #include "phy_common.h" |
e4d6b795 | 32 | #include "dma.h" |
5100d5ac | 33 | #include "pio.h" |
03b29773 | 34 | |
e4d6b795 | 35 | |
8318d78a JB |
36 | /* Extract the bitrate index out of a CCK PLCP header. */ |
37 | static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp) | |
e4d6b795 MB |
38 | { |
39 | switch (plcp->raw[0]) { | |
40 | case 0x0A: | |
8318d78a | 41 | return 0; |
e4d6b795 | 42 | case 0x14: |
8318d78a | 43 | return 1; |
e4d6b795 | 44 | case 0x37: |
8318d78a | 45 | return 2; |
e4d6b795 | 46 | case 0x6E: |
8318d78a | 47 | return 3; |
e4d6b795 | 48 | } |
8318d78a | 49 | return -1; |
e4d6b795 MB |
50 | } |
51 | ||
8318d78a | 52 | /* Extract the bitrate index out of an OFDM PLCP header. */ |
a3c0b87c | 53 | static int 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 | 74 | } |
8318d78a | 75 | return -1; |
e4d6b795 MB |
76 | } |
77 | ||
78 | u8 b43_plcp_get_ratecode_cck(const u8 bitrate) | |
79 | { | |
80 | switch (bitrate) { | |
81 | case B43_CCK_RATE_1MB: | |
82 | return 0x0A; | |
83 | case B43_CCK_RATE_2MB: | |
84 | return 0x14; | |
85 | case B43_CCK_RATE_5MB: | |
86 | return 0x37; | |
87 | case B43_CCK_RATE_11MB: | |
88 | return 0x6E; | |
89 | } | |
90 | B43_WARN_ON(1); | |
91 | return 0; | |
92 | } | |
93 | ||
94 | u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate) | |
95 | { | |
96 | switch (bitrate) { | |
97 | case B43_OFDM_RATE_6MB: | |
98 | return 0xB; | |
99 | case B43_OFDM_RATE_9MB: | |
100 | return 0xF; | |
101 | case B43_OFDM_RATE_12MB: | |
102 | return 0xA; | |
103 | case B43_OFDM_RATE_18MB: | |
104 | return 0xE; | |
105 | case B43_OFDM_RATE_24MB: | |
106 | return 0x9; | |
107 | case B43_OFDM_RATE_36MB: | |
108 | return 0xD; | |
109 | case B43_OFDM_RATE_48MB: | |
110 | return 0x8; | |
111 | case B43_OFDM_RATE_54MB: | |
112 | return 0xC; | |
113 | } | |
114 | B43_WARN_ON(1); | |
115 | return 0; | |
116 | } | |
117 | ||
118 | void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp, | |
119 | const u16 octets, const u8 bitrate) | |
120 | { | |
121 | __le32 *data = &(plcp->data); | |
122 | __u8 *raw = plcp->raw; | |
123 | ||
124 | if (b43_is_ofdm_rate(bitrate)) { | |
1a09404a MB |
125 | u32 d; |
126 | ||
127 | d = b43_plcp_get_ratecode_ofdm(bitrate); | |
e4d6b795 | 128 | B43_WARN_ON(octets & 0xF000); |
1a09404a MB |
129 | d |= (octets << 5); |
130 | *data = cpu_to_le32(d); | |
e4d6b795 MB |
131 | } else { |
132 | u32 plen; | |
133 | ||
134 | plen = octets * 16 / bitrate; | |
135 | if ((octets * 16 % bitrate) > 0) { | |
136 | plen++; | |
137 | if ((bitrate == B43_CCK_RATE_11MB) | |
138 | && ((octets * 8 % 11) < 4)) { | |
139 | raw[1] = 0x84; | |
140 | } else | |
141 | raw[1] = 0x04; | |
142 | } else | |
143 | raw[1] = 0x04; | |
144 | *data |= cpu_to_le32(plen << 16); | |
145 | raw[0] = b43_plcp_get_ratecode_cck(bitrate); | |
146 | } | |
147 | } | |
148 | ||
149 | static u8 b43_calc_fallback_rate(u8 bitrate) | |
150 | { | |
151 | switch (bitrate) { | |
152 | case B43_CCK_RATE_1MB: | |
153 | return B43_CCK_RATE_1MB; | |
154 | case B43_CCK_RATE_2MB: | |
155 | return B43_CCK_RATE_1MB; | |
156 | case B43_CCK_RATE_5MB: | |
157 | return B43_CCK_RATE_2MB; | |
158 | case B43_CCK_RATE_11MB: | |
159 | return B43_CCK_RATE_5MB; | |
160 | case B43_OFDM_RATE_6MB: | |
161 | return B43_CCK_RATE_5MB; | |
162 | case B43_OFDM_RATE_9MB: | |
163 | return B43_OFDM_RATE_6MB; | |
164 | case B43_OFDM_RATE_12MB: | |
165 | return B43_OFDM_RATE_9MB; | |
166 | case B43_OFDM_RATE_18MB: | |
167 | return B43_OFDM_RATE_12MB; | |
168 | case B43_OFDM_RATE_24MB: | |
169 | return B43_OFDM_RATE_18MB; | |
170 | case B43_OFDM_RATE_36MB: | |
171 | return B43_OFDM_RATE_24MB; | |
172 | case B43_OFDM_RATE_48MB: | |
173 | return B43_OFDM_RATE_36MB; | |
174 | case B43_OFDM_RATE_54MB: | |
175 | return B43_OFDM_RATE_48MB; | |
176 | } | |
177 | B43_WARN_ON(1); | |
178 | return 0; | |
179 | } | |
180 | ||
eb189d8b | 181 | /* Generate a TX data header. */ |
09552ccd MB |
182 | int b43_generate_txhdr(struct b43_wldev *dev, |
183 | u8 *_txhdr, | |
184 | const unsigned char *fragment_data, | |
185 | unsigned int fragment_len, | |
e6a9854b | 186 | struct ieee80211_tx_info *info, |
09552ccd | 187 | u16 cookie) |
e4d6b795 | 188 | { |
eb189d8b | 189 | struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr; |
e4d6b795 MB |
190 | const struct b43_phy *phy = &dev->phy; |
191 | const struct ieee80211_hdr *wlhdr = | |
192 | (const struct ieee80211_hdr *)fragment_data; | |
d0f09804 | 193 | int use_encryption = !!info->control.hw_key; |
f37d9234 | 194 | __le16 fctl = wlhdr->frame_control; |
8318d78a | 195 | struct ieee80211_rate *fbrate; |
e4d6b795 MB |
196 | u8 rate, rate_fb; |
197 | int rate_ofdm, rate_fb_ofdm; | |
198 | unsigned int plcp_fragment_len; | |
199 | u32 mac_ctl = 0; | |
200 | u16 phy_ctl = 0; | |
201 | u8 extra_ft = 0; | |
2e92e6f2 | 202 | struct ieee80211_rate *txrate; |
e6a9854b | 203 | struct ieee80211_tx_rate *rates; |
e4d6b795 MB |
204 | |
205 | memset(txhdr, 0, sizeof(*txhdr)); | |
206 | ||
e039fa4a | 207 | txrate = ieee80211_get_tx_rate(dev->wl->hw, info); |
2e92e6f2 | 208 | rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB; |
e4d6b795 | 209 | rate_ofdm = b43_is_ofdm_rate(rate); |
870abdf6 | 210 | fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate; |
8318d78a | 211 | rate_fb = fbrate->hw_value; |
e4d6b795 MB |
212 | rate_fb_ofdm = b43_is_ofdm_rate(rate_fb); |
213 | ||
214 | if (rate_ofdm) | |
215 | txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate); | |
216 | else | |
217 | txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate); | |
218 | txhdr->mac_frame_ctl = wlhdr->frame_control; | |
219 | memcpy(txhdr->tx_receiver, wlhdr->addr1, 6); | |
220 | ||
221 | /* Calculate duration for fallback rate */ | |
222 | if ((rate_fb == rate) || | |
223 | (wlhdr->duration_id & cpu_to_le16(0x8000)) || | |
224 | (wlhdr->duration_id == cpu_to_le16(0))) { | |
225 | /* If the fallback rate equals the normal rate or the | |
226 | * dur_id field contains an AID, CFP magic or 0, | |
227 | * use the original dur_id field. */ | |
228 | txhdr->dur_fb = wlhdr->duration_id; | |
229 | } else { | |
e039fa4a JB |
230 | txhdr->dur_fb = ieee80211_generic_frame_duration( |
231 | dev->wl->hw, info->control.vif, fragment_len, fbrate); | |
e4d6b795 MB |
232 | } |
233 | ||
234 | plcp_fragment_len = fragment_len + FCS_LEN; | |
235 | if (use_encryption) { | |
e039fa4a | 236 | u8 key_idx = info->control.hw_key->hw_key_idx; |
e4d6b795 MB |
237 | struct b43_key *key; |
238 | int wlhdr_len; | |
239 | size_t iv_len; | |
240 | ||
241 | B43_WARN_ON(key_idx >= dev->max_nr_keys); | |
242 | key = &(dev->key[key_idx]); | |
7be1bb6b | 243 | |
09552ccd MB |
244 | if (unlikely(!key->keyconf)) { |
245 | /* This key is invalid. This might only happen | |
246 | * in a short timeframe after machine resume before | |
247 | * we were able to reconfigure keys. | |
248 | * Drop this packet completely. Do not transmit it | |
249 | * unencrypted to avoid leaking information. */ | |
250 | return -ENOKEY; | |
7be1bb6b | 251 | } |
09552ccd MB |
252 | |
253 | /* Hardware appends ICV. */ | |
76708dee | 254 | plcp_fragment_len += info->control.hw_key->icv_len; |
09552ccd MB |
255 | |
256 | key_idx = b43_kidx_to_fw(dev, key_idx); | |
257 | mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) & | |
258 | B43_TXH_MAC_KEYIDX; | |
259 | mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) & | |
260 | B43_TXH_MAC_KEYALG; | |
f37d9234 | 261 | wlhdr_len = ieee80211_hdrlen(fctl); |
76708dee | 262 | iv_len = min((size_t) info->control.hw_key->iv_len, |
09552ccd MB |
263 | ARRAY_SIZE(txhdr->iv)); |
264 | memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len); | |
e4d6b795 | 265 | } |
eb189d8b MB |
266 | if (b43_is_old_txhdr_format(dev)) { |
267 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->old_format.plcp), | |
268 | plcp_fragment_len, rate); | |
269 | } else { | |
270 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->new_format.plcp), | |
271 | plcp_fragment_len, rate); | |
272 | } | |
e4d6b795 MB |
273 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb), |
274 | plcp_fragment_len, rate_fb); | |
275 | ||
276 | /* Extra Frame Types */ | |
277 | if (rate_fb_ofdm) | |
eb189d8b MB |
278 | extra_ft |= B43_TXH_EFT_FB_OFDM; |
279 | else | |
280 | extra_ft |= B43_TXH_EFT_FB_CCK; | |
e4d6b795 MB |
281 | |
282 | /* Set channel radio code. Note that the micrcode ORs 0x100 to | |
283 | * this value before comparing it to the value in SHM, if this | |
284 | * is a 5Ghz packet. | |
285 | */ | |
286 | txhdr->chan_radio_code = phy->channel; | |
287 | ||
288 | /* PHY TX Control word */ | |
289 | if (rate_ofdm) | |
eb189d8b MB |
290 | phy_ctl |= B43_TXH_PHY_ENC_OFDM; |
291 | else | |
292 | phy_ctl |= B43_TXH_PHY_ENC_CCK; | |
e6a9854b | 293 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
eb189d8b | 294 | phy_ctl |= B43_TXH_PHY_SHORTPRMBL; |
9db1f6d7 | 295 | |
e039fa4a | 296 | switch (b43_ieee80211_antenna_sanitize(dev, info->antenna_sel_tx)) { |
9db1f6d7 | 297 | case 0: /* Default */ |
eb189d8b | 298 | phy_ctl |= B43_TXH_PHY_ANT01AUTO; |
e4d6b795 | 299 | break; |
9db1f6d7 | 300 | case 1: /* Antenna 0 */ |
eb189d8b | 301 | phy_ctl |= B43_TXH_PHY_ANT0; |
e4d6b795 | 302 | break; |
9db1f6d7 | 303 | case 2: /* Antenna 1 */ |
eb189d8b MB |
304 | phy_ctl |= B43_TXH_PHY_ANT1; |
305 | break; | |
306 | case 3: /* Antenna 2 */ | |
307 | phy_ctl |= B43_TXH_PHY_ANT2; | |
308 | break; | |
309 | case 4: /* Antenna 3 */ | |
310 | phy_ctl |= B43_TXH_PHY_ANT3; | |
e4d6b795 MB |
311 | break; |
312 | default: | |
313 | B43_WARN_ON(1); | |
314 | } | |
315 | ||
e6a9854b | 316 | rates = info->control.rates; |
e4d6b795 | 317 | /* MAC control */ |
e039fa4a | 318 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) |
eb189d8b | 319 | mac_ctl |= B43_TXH_MAC_ACK; |
f591fa5d JB |
320 | /* use hardware sequence counter as the non-TID counter */ |
321 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) | |
eb189d8b | 322 | mac_ctl |= B43_TXH_MAC_HWSEQ; |
e039fa4a | 323 | if (info->flags & IEEE80211_TX_CTL_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; |
e6a9854b JB |
327 | |
328 | /* Overwrite rates[0].count to make the retry calculation | |
329 | * in the tx status easier. need the actual retry limit to | |
330 | * detect whether the fallback rate was used. | |
331 | */ | |
332 | if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || | |
333 | (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) { | |
334 | rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count; | |
eb189d8b | 335 | mac_ctl |= B43_TXH_MAC_LONGFRAME; |
e6a9854b JB |
336 | } else { |
337 | rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count; | |
338 | } | |
e4d6b795 MB |
339 | |
340 | /* Generate the RTS or CTS-to-self frame */ | |
e6a9854b JB |
341 | if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || |
342 | (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) { | |
e4d6b795 MB |
343 | unsigned int len; |
344 | struct ieee80211_hdr *hdr; | |
345 | int rts_rate, rts_rate_fb; | |
346 | int rts_rate_ofdm, rts_rate_fb_ofdm; | |
eb189d8b | 347 | struct b43_plcp_hdr6 *plcp; |
2e92e6f2 | 348 | struct ieee80211_rate *rts_cts_rate; |
e4d6b795 | 349 | |
e039fa4a | 350 | rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info); |
2e92e6f2 JB |
351 | |
352 | rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB; | |
e4d6b795 MB |
353 | rts_rate_ofdm = b43_is_ofdm_rate(rts_rate); |
354 | rts_rate_fb = b43_calc_fallback_rate(rts_rate); | |
355 | rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb); | |
356 | ||
e6a9854b | 357 | if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { |
eb189d8b MB |
358 | struct ieee80211_cts *cts; |
359 | ||
360 | if (b43_is_old_txhdr_format(dev)) { | |
361 | cts = (struct ieee80211_cts *) | |
362 | (txhdr->old_format.rts_frame); | |
363 | } else { | |
364 | cts = (struct ieee80211_cts *) | |
365 | (txhdr->new_format.rts_frame); | |
366 | } | |
e039fa4a | 367 | ieee80211_ctstoself_get(dev->wl->hw, info->control.vif, |
e4d6b795 | 368 | fragment_data, fragment_len, |
e039fa4a | 369 | info, cts); |
eb189d8b | 370 | mac_ctl |= B43_TXH_MAC_SENDCTS; |
e4d6b795 MB |
371 | len = sizeof(struct ieee80211_cts); |
372 | } else { | |
eb189d8b MB |
373 | struct ieee80211_rts *rts; |
374 | ||
375 | if (b43_is_old_txhdr_format(dev)) { | |
376 | rts = (struct ieee80211_rts *) | |
377 | (txhdr->old_format.rts_frame); | |
378 | } else { | |
379 | rts = (struct ieee80211_rts *) | |
380 | (txhdr->new_format.rts_frame); | |
381 | } | |
e039fa4a | 382 | ieee80211_rts_get(dev->wl->hw, info->control.vif, |
eb189d8b | 383 | fragment_data, fragment_len, |
e039fa4a | 384 | info, rts); |
eb189d8b | 385 | mac_ctl |= B43_TXH_MAC_SENDRTS; |
e4d6b795 MB |
386 | len = sizeof(struct ieee80211_rts); |
387 | } | |
388 | len += FCS_LEN; | |
eb189d8b MB |
389 | |
390 | /* Generate the PLCP headers for the RTS/CTS frame */ | |
391 | if (b43_is_old_txhdr_format(dev)) | |
392 | plcp = &txhdr->old_format.rts_plcp; | |
393 | else | |
394 | plcp = &txhdr->new_format.rts_plcp; | |
395 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp, | |
396 | len, rts_rate); | |
397 | plcp = &txhdr->rts_plcp_fb; | |
398 | b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp, | |
e4d6b795 | 399 | len, rts_rate_fb); |
eb189d8b MB |
400 | |
401 | if (b43_is_old_txhdr_format(dev)) { | |
402 | hdr = (struct ieee80211_hdr *) | |
403 | (&txhdr->old_format.rts_frame); | |
404 | } else { | |
405 | hdr = (struct ieee80211_hdr *) | |
406 | (&txhdr->new_format.rts_frame); | |
407 | } | |
e4d6b795 | 408 | txhdr->rts_dur_fb = hdr->duration_id; |
eb189d8b | 409 | |
e4d6b795 | 410 | if (rts_rate_ofdm) { |
eb189d8b | 411 | extra_ft |= B43_TXH_EFT_RTS_OFDM; |
e4d6b795 MB |
412 | txhdr->phy_rate_rts = |
413 | b43_plcp_get_ratecode_ofdm(rts_rate); | |
eb189d8b MB |
414 | } else { |
415 | extra_ft |= B43_TXH_EFT_RTS_CCK; | |
e4d6b795 MB |
416 | txhdr->phy_rate_rts = |
417 | b43_plcp_get_ratecode_cck(rts_rate); | |
eb189d8b | 418 | } |
e4d6b795 | 419 | if (rts_rate_fb_ofdm) |
eb189d8b MB |
420 | extra_ft |= B43_TXH_EFT_RTSFB_OFDM; |
421 | else | |
422 | extra_ft |= B43_TXH_EFT_RTSFB_CCK; | |
e4d6b795 MB |
423 | } |
424 | ||
425 | /* Magic cookie */ | |
eb189d8b MB |
426 | if (b43_is_old_txhdr_format(dev)) |
427 | txhdr->old_format.cookie = cpu_to_le16(cookie); | |
428 | else | |
429 | txhdr->new_format.cookie = cpu_to_le16(cookie); | |
e4d6b795 MB |
430 | |
431 | /* Apply the bitfields */ | |
432 | txhdr->mac_ctl = cpu_to_le32(mac_ctl); | |
433 | txhdr->phy_ctl = cpu_to_le16(phy_ctl); | |
434 | txhdr->extra_ft = extra_ft; | |
e4d6b795 | 435 | |
09552ccd | 436 | return 0; |
e4d6b795 MB |
437 | } |
438 | ||
439 | static s8 b43_rssi_postprocess(struct b43_wldev *dev, | |
440 | u8 in_rssi, int ofdm, | |
441 | int adjust_2053, int adjust_2050) | |
442 | { | |
443 | struct b43_phy *phy = &dev->phy; | |
ef1a628d | 444 | struct b43_phy_g *gphy = phy->g; |
e4d6b795 MB |
445 | s32 tmp; |
446 | ||
447 | switch (phy->radio_ver) { | |
448 | case 0x2050: | |
449 | if (ofdm) { | |
450 | tmp = in_rssi; | |
451 | if (tmp > 127) | |
452 | tmp -= 256; | |
453 | tmp *= 73; | |
454 | tmp /= 64; | |
455 | if (adjust_2050) | |
456 | tmp += 25; | |
457 | else | |
458 | tmp -= 3; | |
459 | } else { | |
95de2841 | 460 | if (dev->dev->bus->sprom. |
e4d6b795 MB |
461 | boardflags_lo & B43_BFL_RSSI) { |
462 | if (in_rssi > 63) | |
463 | in_rssi = 63; | |
ef1a628d MB |
464 | B43_WARN_ON(phy->type != B43_PHYTYPE_G); |
465 | tmp = gphy->nrssi_lt[in_rssi]; | |
e4d6b795 MB |
466 | tmp = 31 - tmp; |
467 | tmp *= -131; | |
468 | tmp /= 128; | |
469 | tmp -= 57; | |
470 | } else { | |
471 | tmp = in_rssi; | |
472 | tmp = 31 - tmp; | |
473 | tmp *= -149; | |
474 | tmp /= 128; | |
475 | tmp -= 68; | |
476 | } | |
477 | if (phy->type == B43_PHYTYPE_G && adjust_2050) | |
478 | tmp += 25; | |
479 | } | |
480 | break; | |
481 | case 0x2060: | |
482 | if (in_rssi > 127) | |
483 | tmp = in_rssi - 256; | |
484 | else | |
485 | tmp = in_rssi; | |
486 | break; | |
487 | default: | |
488 | tmp = in_rssi; | |
489 | tmp -= 11; | |
490 | tmp *= 103; | |
491 | tmp /= 64; | |
492 | if (adjust_2053) | |
493 | tmp -= 109; | |
494 | else | |
495 | tmp -= 83; | |
496 | } | |
497 | ||
498 | return (s8) tmp; | |
499 | } | |
500 | ||
501 | //TODO | |
502 | #if 0 | |
503 | static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi) | |
504 | { | |
505 | struct b43_phy *phy = &dev->phy; | |
506 | s8 ret; | |
507 | ||
508 | if (phy->type == B43_PHYTYPE_A) { | |
509 | //TODO: Incomplete specs. | |
510 | ret = 0; | |
511 | } else | |
512 | ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1); | |
513 | ||
514 | return ret; | |
515 | } | |
516 | #endif | |
517 | ||
518 | void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr) | |
519 | { | |
520 | struct ieee80211_rx_status status; | |
521 | struct b43_plcp_hdr6 *plcp; | |
522 | struct ieee80211_hdr *wlhdr; | |
523 | const struct b43_rxhdr_fw4 *rxhdr = _rxhdr; | |
f37d9234 | 524 | __le16 fctl; |
e4d6b795 MB |
525 | u16 phystat0, phystat3, chanstat, mactime; |
526 | u32 macstat; | |
527 | u16 chanid; | |
8318d78a | 528 | u16 phytype; |
e4d6b795 MB |
529 | int padding; |
530 | ||
531 | memset(&status, 0, sizeof(status)); | |
532 | ||
533 | /* Get metadata about the frame from the header. */ | |
534 | phystat0 = le16_to_cpu(rxhdr->phy_status0); | |
535 | phystat3 = le16_to_cpu(rxhdr->phy_status3); | |
e4d6b795 MB |
536 | macstat = le32_to_cpu(rxhdr->mac_status); |
537 | mactime = le16_to_cpu(rxhdr->mac_time); | |
538 | chanstat = le16_to_cpu(rxhdr->channel); | |
8318d78a | 539 | phytype = chanstat & B43_RX_CHAN_PHYTYPE; |
e4d6b795 | 540 | |
ce4fbdbf | 541 | if (unlikely(macstat & B43_RX_MAC_FCSERR)) { |
e4d6b795 | 542 | dev->wl->ieee_stats.dot11FCSErrorCount++; |
ce4fbdbf MB |
543 | status.flag |= RX_FLAG_FAILED_FCS_CRC; |
544 | } | |
545 | if (unlikely(phystat0 & (B43_RX_PHYST0_PLCPHCF | B43_RX_PHYST0_PLCPFV))) | |
546 | status.flag |= RX_FLAG_FAILED_PLCP_CRC; | |
547 | if (phystat0 & B43_RX_PHYST0_SHORTPRMBL) | |
548 | status.flag |= RX_FLAG_SHORTPRE; | |
e4d6b795 MB |
549 | if (macstat & B43_RX_MAC_DECERR) { |
550 | /* Decryption with the given key failed. | |
551 | * Drop the packet. We also won't be able to decrypt it with | |
552 | * the key in software. */ | |
553 | goto drop; | |
554 | } | |
555 | ||
556 | /* Skip PLCP and padding */ | |
557 | padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0; | |
558 | if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) { | |
559 | b43dbg(dev->wl, "RX: Packet size underrun (1)\n"); | |
560 | goto drop; | |
561 | } | |
562 | plcp = (struct b43_plcp_hdr6 *)(skb->data + padding); | |
563 | skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding); | |
564 | /* The skb contains the Wireless Header + payload data now */ | |
565 | if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) { | |
566 | b43dbg(dev->wl, "RX: Packet size underrun (2)\n"); | |
567 | goto drop; | |
568 | } | |
569 | wlhdr = (struct ieee80211_hdr *)(skb->data); | |
f37d9234 | 570 | fctl = wlhdr->frame_control; |
e4d6b795 MB |
571 | |
572 | if (macstat & B43_RX_MAC_DEC) { | |
573 | unsigned int keyidx; | |
574 | int wlhdr_len; | |
575 | ||
576 | keyidx = ((macstat & B43_RX_MAC_KEYIDX) | |
577 | >> B43_RX_MAC_KEYIDX_SHIFT); | |
578 | /* We must adjust the key index here. We want the "physical" | |
579 | * key index, but the ucode passed it slightly different. | |
580 | */ | |
581 | keyidx = b43_kidx_to_raw(dev, keyidx); | |
582 | B43_WARN_ON(keyidx >= dev->max_nr_keys); | |
583 | ||
584 | if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) { | |
f37d9234 | 585 | wlhdr_len = ieee80211_hdrlen(fctl); |
e4d6b795 MB |
586 | if (unlikely(skb->len < (wlhdr_len + 3))) { |
587 | b43dbg(dev->wl, | |
588 | "RX: Packet size underrun (3)\n"); | |
589 | goto drop; | |
590 | } | |
591 | status.flag |= RX_FLAG_DECRYPTED; | |
592 | } | |
593 | } | |
594 | ||
7b584163 | 595 | /* Link quality statistics */ |
e4d6b795 | 596 | status.noise = dev->stats.link_noise; |
7b584163 MB |
597 | if ((chanstat & B43_RX_CHAN_PHYTYPE) == B43_PHYTYPE_N) { |
598 | // s8 rssi = max(rxhdr->power0, rxhdr->power1); | |
599 | //TODO: Find out what the rssi value is (dBm or percentage?) | |
600 | // and also find out what the maximum possible value is. | |
601 | // Fill status.ssi and status.signal fields. | |
602 | } else { | |
566bfe5a | 603 | status.signal = b43_rssi_postprocess(dev, rxhdr->jssi, |
7b584163 MB |
604 | (phystat0 & B43_RX_PHYST0_OFDM), |
605 | (phystat0 & B43_RX_PHYST0_GAINCTL), | |
606 | (phystat3 & B43_RX_PHYST3_TRSTATE)); | |
566bfe5a | 607 | status.qual = (rxhdr->jssi * 100) / B43_RX_MAX_SSI; |
7b584163 MB |
608 | } |
609 | ||
e4d6b795 | 610 | if (phystat0 & B43_RX_PHYST0_OFDM) |
8318d78a JB |
611 | status.rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp, |
612 | phytype == B43_PHYTYPE_A); | |
e4d6b795 | 613 | else |
8318d78a | 614 | status.rate_idx = b43_plcp_get_bitrate_idx_cck(plcp); |
ce4fbdbf MB |
615 | if (unlikely(status.rate_idx == -1)) { |
616 | /* PLCP seems to be corrupted. | |
617 | * Drop the frame, if we are not interested in corrupted frames. */ | |
618 | if (!(dev->wl->filter_flags & FIF_PLCPFAIL)) | |
619 | goto drop; | |
620 | } | |
e4d6b795 | 621 | status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT); |
c0ddd04d JL |
622 | |
623 | /* | |
d007b7f4 JB |
624 | * All frames on monitor interfaces and beacons always need a full |
625 | * 64-bit timestamp. Monitor interfaces need it for diagnostic | |
626 | * purposes and beacons for IBSS merging. | |
627 | * This code assumes we get to process the packet within 16 bits | |
628 | * of timestamp, i.e. about 65 milliseconds after the PHY received | |
629 | * the first symbol. | |
c0ddd04d | 630 | */ |
f37d9234 | 631 | if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) { |
c0ddd04d JL |
632 | u16 low_mactime_now; |
633 | ||
634 | b43_tsf_read(dev, &status.mactime); | |
635 | low_mactime_now = status.mactime; | |
636 | status.mactime = status.mactime & ~0xFFFFULL; | |
637 | status.mactime += mactime; | |
638 | if (low_mactime_now <= mactime) | |
639 | status.mactime -= 0x10000; | |
640 | status.flag |= RX_FLAG_TSFT; | |
641 | } | |
e4d6b795 MB |
642 | |
643 | chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT; | |
644 | switch (chanstat & B43_RX_CHAN_PHYTYPE) { | |
645 | case B43_PHYTYPE_A: | |
8318d78a | 646 | status.band = IEEE80211_BAND_5GHZ; |
d987160b MB |
647 | B43_WARN_ON(1); |
648 | /* FIXME: We don't really know which value the "chanid" contains. | |
649 | * So the following assignment might be wrong. */ | |
8318d78a | 650 | status.freq = b43_channel_to_freq_5ghz(chanid); |
e4d6b795 MB |
651 | break; |
652 | case B43_PHYTYPE_G: | |
8318d78a | 653 | status.band = IEEE80211_BAND_2GHZ; |
d987160b MB |
654 | /* chanid is the radio channel cookie value as used |
655 | * to tune the radio. */ | |
e4d6b795 | 656 | status.freq = chanid + 2400; |
d987160b MB |
657 | break; |
658 | case B43_PHYTYPE_N: | |
d987160b MB |
659 | /* chanid is the SHM channel cookie. Which is the plain |
660 | * channel number in b43. */ | |
8318d78a JB |
661 | if (chanstat & B43_RX_CHAN_5GHZ) { |
662 | status.band = IEEE80211_BAND_5GHZ; | |
663 | status.freq = b43_freq_to_channel_5ghz(chanid); | |
664 | } else { | |
665 | status.band = IEEE80211_BAND_2GHZ; | |
666 | status.freq = b43_freq_to_channel_2ghz(chanid); | |
667 | } | |
e4d6b795 MB |
668 | break; |
669 | default: | |
670 | B43_WARN_ON(1); | |
d987160b | 671 | goto drop; |
e4d6b795 MB |
672 | } |
673 | ||
e4d6b795 MB |
674 | ieee80211_rx_irqsafe(dev->wl->hw, skb, &status); |
675 | ||
676 | return; | |
677 | drop: | |
678 | b43dbg(dev->wl, "RX: Packet dropped\n"); | |
679 | dev_kfree_skb_any(skb); | |
680 | } | |
681 | ||
682 | void b43_handle_txstatus(struct b43_wldev *dev, | |
683 | const struct b43_txstatus *status) | |
684 | { | |
685 | b43_debugfs_log_txstat(dev, status); | |
686 | ||
687 | if (status->intermediate) | |
688 | return; | |
689 | if (status->for_ampdu) | |
690 | return; | |
691 | if (!status->acked) | |
692 | dev->wl->ieee_stats.dot11ACKFailureCount++; | |
693 | if (status->rts_count) { | |
694 | if (status->rts_count == 0xF) //FIXME | |
695 | dev->wl->ieee_stats.dot11RTSFailureCount++; | |
696 | else | |
697 | dev->wl->ieee_stats.dot11RTSSuccessCount++; | |
698 | } | |
699 | ||
5100d5ac MB |
700 | if (b43_using_pio_transfers(dev)) |
701 | b43_pio_handle_txstatus(dev, status); | |
702 | else | |
703 | b43_dma_handle_txstatus(dev, status); | |
18c8adeb MB |
704 | |
705 | b43_phy_txpower_check(dev, 0); | |
e4d6b795 MB |
706 | } |
707 | ||
5100d5ac MB |
708 | /* Fill out the mac80211 TXstatus report based on the b43-specific |
709 | * txstatus report data. This returns a boolean whether the frame was | |
710 | * successfully transmitted. */ | |
e6a9854b JB |
711 | bool b43_fill_txstatus_report(struct b43_wldev *dev, |
712 | struct ieee80211_tx_info *report, | |
5100d5ac | 713 | const struct b43_txstatus *status) |
e4d6b795 | 714 | { |
5100d5ac | 715 | bool frame_success = 1; |
e6a9854b JB |
716 | int retry_limit; |
717 | ||
718 | /* preserve the confiured retry limit before clearing the status | |
719 | * The xmit function has overwritten the rc's value with the actual | |
720 | * retry limit done by the hardware */ | |
721 | retry_limit = report->status.rates[0].count; | |
722 | ieee80211_tx_info_clear_status(report); | |
5100d5ac MB |
723 | |
724 | if (status->acked) { | |
725 | /* The frame was ACKed. */ | |
e039fa4a | 726 | report->flags |= IEEE80211_TX_STAT_ACK; |
5100d5ac MB |
727 | } else { |
728 | /* The frame was not ACKed... */ | |
e039fa4a | 729 | if (!(report->flags & IEEE80211_TX_CTL_NO_ACK)) { |
5100d5ac MB |
730 | /* ...but we expected an ACK. */ |
731 | frame_success = 0; | |
5100d5ac MB |
732 | } |
733 | } | |
734 | if (status->frame_count == 0) { | |
735 | /* The frame was not transmitted at all. */ | |
e6a9854b JB |
736 | report->status.rates[0].count = 0; |
737 | } else if (status->rts_count > dev->wl->hw->conf.short_frame_max_tx_count) { | |
738 | /* | |
739 | * If the short retries (RTS, not data frame) have exceeded | |
740 | * the limit, the hw will not have tried the selected rate, | |
741 | * but will have used the fallback rate instead. | |
742 | * Don't let the rate control count attempts for the selected | |
743 | * rate in this case, otherwise the statistics will be off. | |
744 | */ | |
745 | report->status.rates[0].count = 0; | |
746 | report->status.rates[1].count = status->frame_count; | |
747 | } else { | |
748 | if (status->frame_count > retry_limit) { | |
749 | report->status.rates[0].count = retry_limit; | |
750 | report->status.rates[1].count = status->frame_count - | |
751 | retry_limit; | |
752 | ||
753 | } else { | |
754 | report->status.rates[0].count = status->frame_count; | |
755 | report->status.rates[1].idx = -1; | |
756 | } | |
757 | } | |
5100d5ac MB |
758 | |
759 | return frame_success; | |
e4d6b795 MB |
760 | } |
761 | ||
762 | /* Stop any TX operation on the device (suspend the hardware queues) */ | |
763 | void b43_tx_suspend(struct b43_wldev *dev) | |
764 | { | |
5100d5ac MB |
765 | if (b43_using_pio_transfers(dev)) |
766 | b43_pio_tx_suspend(dev); | |
767 | else | |
768 | b43_dma_tx_suspend(dev); | |
e4d6b795 MB |
769 | } |
770 | ||
771 | /* Resume any TX operation on the device (resume the hardware queues) */ | |
772 | void b43_tx_resume(struct b43_wldev *dev) | |
773 | { | |
5100d5ac MB |
774 | if (b43_using_pio_transfers(dev)) |
775 | b43_pio_tx_resume(dev); | |
776 | else | |
777 | b43_dma_tx_resume(dev); | |
e4d6b795 | 778 | } |