914 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 4 Broadcom B43 wireless driver5 6 Transmission (TX/RX) related functions.7 8 Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>9 Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>10 Copyright (C) 2005, 2006 Michael Buesch <m@bues.ch>11 Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>12 Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>13 14 15*/16 17#include "xmit.h"18#include "phy_common.h"19#include "dma.h"20#include "pio.h"21 22static const struct b43_tx_legacy_rate_phy_ctl_entry b43_tx_legacy_rate_phy_ctl[] = {23 { B43_CCK_RATE_1MB, 0x0, 0x0 },24 { B43_CCK_RATE_2MB, 0x0, 0x1 },25 { B43_CCK_RATE_5MB, 0x0, 0x2 },26 { B43_CCK_RATE_11MB, 0x0, 0x3 },27 { B43_OFDM_RATE_6MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_BPSK },28 { B43_OFDM_RATE_9MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_BPSK },29 { B43_OFDM_RATE_12MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QPSK },30 { B43_OFDM_RATE_18MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QPSK },31 { B43_OFDM_RATE_24MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QAM16 },32 { B43_OFDM_RATE_36MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM16 },33 { B43_OFDM_RATE_48MB, B43_TXH_PHY1_CRATE_2_3, B43_TXH_PHY1_MODUL_QAM64 },34 { B43_OFDM_RATE_54MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM64 },35};36 37static const struct b43_tx_legacy_rate_phy_ctl_entry *38b43_tx_legacy_rate_phy_ctl_ent(u8 bitrate)39{40 const struct b43_tx_legacy_rate_phy_ctl_entry *e;41 unsigned int i;42 43 for (i = 0; i < ARRAY_SIZE(b43_tx_legacy_rate_phy_ctl); i++) {44 e = &(b43_tx_legacy_rate_phy_ctl[i]);45 if (e->bitrate == bitrate)46 return e;47 }48 49 B43_WARN_ON(1);50 return NULL;51}52 53/* Extract the bitrate index out of a CCK PLCP header. */54static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp)55{56 switch (plcp->raw[0]) {57 case 0x0A:58 return 0;59 case 0x14:60 return 1;61 case 0x37:62 return 2;63 case 0x6E:64 return 3;65 }66 return -1;67}68 69/* Extract the bitrate index out of an OFDM PLCP header. */70static int b43_plcp_get_bitrate_idx_ofdm(struct b43_plcp_hdr6 *plcp, bool ghz5)71{72 /* For 2 GHz band first OFDM rate is at index 4, see main.c */73 int base = ghz5 ? 0 : 4;74 75 switch (plcp->raw[0] & 0xF) {76 case 0xB:77 return base + 0;78 case 0xF:79 return base + 1;80 case 0xA:81 return base + 2;82 case 0xE:83 return base + 3;84 case 0x9:85 return base + 4;86 case 0xD:87 return base + 5;88 case 0x8:89 return base + 6;90 case 0xC:91 return base + 7;92 }93 return -1;94}95 96u8 b43_plcp_get_ratecode_cck(const u8 bitrate)97{98 switch (bitrate) {99 case B43_CCK_RATE_1MB:100 return 0x0A;101 case B43_CCK_RATE_2MB:102 return 0x14;103 case B43_CCK_RATE_5MB:104 return 0x37;105 case B43_CCK_RATE_11MB:106 return 0x6E;107 }108 B43_WARN_ON(1);109 return 0;110}111 112u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)113{114 switch (bitrate) {115 case B43_OFDM_RATE_6MB:116 return 0xB;117 case B43_OFDM_RATE_9MB:118 return 0xF;119 case B43_OFDM_RATE_12MB:120 return 0xA;121 case B43_OFDM_RATE_18MB:122 return 0xE;123 case B43_OFDM_RATE_24MB:124 return 0x9;125 case B43_OFDM_RATE_36MB:126 return 0xD;127 case B43_OFDM_RATE_48MB:128 return 0x8;129 case B43_OFDM_RATE_54MB:130 return 0xC;131 }132 B43_WARN_ON(1);133 return 0;134}135 136void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,137 const u16 octets, const u8 bitrate)138{139 __u8 *raw = plcp->raw;140 141 if (b43_is_ofdm_rate(bitrate)) {142 u32 d;143 144 d = b43_plcp_get_ratecode_ofdm(bitrate);145 B43_WARN_ON(octets & 0xF000);146 d |= (octets << 5);147 plcp->data = cpu_to_le32(d);148 } else {149 u32 plen;150 151 plen = octets * 16 / bitrate;152 if ((octets * 16 % bitrate) > 0) {153 plen++;154 if ((bitrate == B43_CCK_RATE_11MB)155 && ((octets * 8 % 11) < 4)) {156 raw[1] = 0x84;157 } else158 raw[1] = 0x04;159 } else160 raw[1] = 0x04;161 plcp->data |= cpu_to_le32(plen << 16);162 raw[0] = b43_plcp_get_ratecode_cck(bitrate);163 }164}165 166/* TODO: verify if needed for SSLPN or LCN */167static u16 b43_generate_tx_phy_ctl1(struct b43_wldev *dev, u8 bitrate)168{169 const struct b43_phy *phy = &dev->phy;170 const struct b43_tx_legacy_rate_phy_ctl_entry *e;171 u16 control = 0;172 u16 bw;173 174 if (phy->type == B43_PHYTYPE_LP)175 bw = B43_TXH_PHY1_BW_20;176 else /* FIXME */177 bw = B43_TXH_PHY1_BW_20;178 179 if (0) { /* FIXME: MIMO */180 } else if (b43_is_cck_rate(bitrate) && phy->type != B43_PHYTYPE_LP) {181 control = bw;182 } else {183 control = bw;184 e = b43_tx_legacy_rate_phy_ctl_ent(bitrate);185 if (e) {186 control |= e->coding_rate;187 control |= e->modulation;188 }189 control |= B43_TXH_PHY1_MODE_SISO;190 }191 192 return control;193}194 195static u8 b43_calc_fallback_rate(u8 bitrate, int gmode)196{197 switch (bitrate) {198 case B43_CCK_RATE_1MB:199 return B43_CCK_RATE_1MB;200 case B43_CCK_RATE_2MB:201 return B43_CCK_RATE_1MB;202 case B43_CCK_RATE_5MB:203 return B43_CCK_RATE_2MB;204 case B43_CCK_RATE_11MB:205 return B43_CCK_RATE_5MB;206 /*207 * Don't just fallback to CCK; it may be in 5GHz operation208 * and falling back to CCK won't work out very well.209 */210 case B43_OFDM_RATE_6MB:211 if (gmode)212 return B43_CCK_RATE_5MB;213 else214 return B43_OFDM_RATE_6MB;215 case B43_OFDM_RATE_9MB:216 return B43_OFDM_RATE_6MB;217 case B43_OFDM_RATE_12MB:218 return B43_OFDM_RATE_9MB;219 case B43_OFDM_RATE_18MB:220 return B43_OFDM_RATE_12MB;221 case B43_OFDM_RATE_24MB:222 return B43_OFDM_RATE_18MB;223 case B43_OFDM_RATE_36MB:224 return B43_OFDM_RATE_24MB;225 case B43_OFDM_RATE_48MB:226 return B43_OFDM_RATE_36MB;227 case B43_OFDM_RATE_54MB:228 return B43_OFDM_RATE_48MB;229 }230 B43_WARN_ON(1);231 return 0;232}233 234/* Generate a TX data header. */235int b43_generate_txhdr(struct b43_wldev *dev,236 u8 *_txhdr,237 struct sk_buff *skb_frag,238 struct ieee80211_tx_info *info,239 u16 cookie)240{241 const unsigned char *fragment_data = skb_frag->data;242 unsigned int fragment_len = skb_frag->len;243 struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr;244 const struct b43_phy *phy = &dev->phy;245 const struct ieee80211_hdr *wlhdr =246 (const struct ieee80211_hdr *)fragment_data;247 int use_encryption = !!info->control.hw_key;248 __le16 fctl = wlhdr->frame_control;249 struct ieee80211_rate *fbrate;250 u8 rate, rate_fb;251 int rate_ofdm, rate_fb_ofdm;252 unsigned int plcp_fragment_len;253 u32 mac_ctl = 0;254 u16 phy_ctl = 0;255 bool fill_phy_ctl1 = (phy->type == B43_PHYTYPE_LP ||256 phy->type == B43_PHYTYPE_N ||257 phy->type == B43_PHYTYPE_HT);258 u8 extra_ft = 0;259 struct ieee80211_rate *txrate;260 struct ieee80211_tx_rate *rates;261 262 memset(txhdr, 0, sizeof(*txhdr));263 264 txrate = ieee80211_get_tx_rate(dev->wl->hw, info);265 rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;266 rate_ofdm = b43_is_ofdm_rate(rate);267 fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate;268 rate_fb = fbrate->hw_value;269 rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);270 271 if (rate_ofdm)272 txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate);273 else274 txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate);275 txhdr->mac_frame_ctl = wlhdr->frame_control;276 memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN);277 278 /* Calculate duration for fallback rate */279 if ((rate_fb == rate) ||280 (wlhdr->duration_id & cpu_to_le16(0x8000)) ||281 (wlhdr->duration_id == cpu_to_le16(0))) {282 /* If the fallback rate equals the normal rate or the283 * dur_id field contains an AID, CFP magic or 0,284 * use the original dur_id field. */285 txhdr->dur_fb = wlhdr->duration_id;286 } else {287 txhdr->dur_fb = ieee80211_generic_frame_duration(288 dev->wl->hw, info->control.vif, info->band,289 fragment_len, fbrate);290 }291 292 plcp_fragment_len = fragment_len + FCS_LEN;293 if (use_encryption) {294 u8 key_idx = info->control.hw_key->hw_key_idx;295 struct b43_key *key;296 int wlhdr_len;297 size_t iv_len;298 299 B43_WARN_ON(key_idx >= ARRAY_SIZE(dev->key));300 key = &(dev->key[key_idx]);301 302 if (unlikely(!key->keyconf)) {303 /* This key is invalid. This might only happen304 * in a short timeframe after machine resume before305 * we were able to reconfigure keys.306 * Drop this packet completely. Do not transmit it307 * unencrypted to avoid leaking information. */308 return -ENOKEY;309 }310 311 /* Hardware appends ICV. */312 plcp_fragment_len += info->control.hw_key->icv_len;313 314 key_idx = b43_kidx_to_fw(dev, key_idx);315 mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &316 B43_TXH_MAC_KEYIDX;317 mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &318 B43_TXH_MAC_KEYALG;319 wlhdr_len = ieee80211_hdrlen(fctl);320 if (key->algorithm == B43_SEC_ALGO_TKIP) {321 u16 phase1key[5];322 int i;323 /* we give the phase1key and iv16 here, the key is stored in324 * shm. With that the hardware can do phase 2 and encryption.325 */326 ieee80211_get_tkip_p1k(info->control.hw_key, skb_frag, phase1key);327 /* phase1key is in host endian. Copy to little-endian txhdr->iv. */328 for (i = 0; i < 5; i++) {329 txhdr->iv[i * 2 + 0] = phase1key[i];330 txhdr->iv[i * 2 + 1] = phase1key[i] >> 8;331 }332 /* iv16 */333 memcpy(txhdr->iv + 10, ((u8 *) wlhdr) + wlhdr_len, 3);334 } else {335 iv_len = min_t(size_t, info->control.hw_key->iv_len,336 ARRAY_SIZE(txhdr->iv));337 memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);338 }339 }340 switch (dev->fw.hdr_format) {341 case B43_FW_HDR_598:342 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_598.plcp),343 plcp_fragment_len, rate);344 break;345 case B43_FW_HDR_351:346 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_351.plcp),347 plcp_fragment_len, rate);348 break;349 case B43_FW_HDR_410:350 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_410.plcp),351 plcp_fragment_len, rate);352 break;353 }354 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),355 plcp_fragment_len, rate_fb);356 357 /* Extra Frame Types */358 if (rate_fb_ofdm)359 extra_ft |= B43_TXH_EFT_FB_OFDM;360 else361 extra_ft |= B43_TXH_EFT_FB_CCK;362 363 /* Set channel radio code. Note that the micrcode ORs 0x100 to364 * this value before comparing it to the value in SHM, if this365 * is a 5Ghz packet.366 */367 txhdr->chan_radio_code = phy->channel;368 369 /* PHY TX Control word */370 if (rate_ofdm)371 phy_ctl |= B43_TXH_PHY_ENC_OFDM;372 else373 phy_ctl |= B43_TXH_PHY_ENC_CCK;374 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)375 phy_ctl |= B43_TXH_PHY_SHORTPRMBL;376 377 switch (b43_ieee80211_antenna_sanitize(dev, 0)) {378 case 0: /* Default */379 phy_ctl |= B43_TXH_PHY_ANT01AUTO;380 break;381 case 1: /* Antenna 0 */382 phy_ctl |= B43_TXH_PHY_ANT0;383 break;384 case 2: /* Antenna 1 */385 phy_ctl |= B43_TXH_PHY_ANT1;386 break;387 case 3: /* Antenna 2 */388 phy_ctl |= B43_TXH_PHY_ANT2;389 break;390 case 4: /* Antenna 3 */391 phy_ctl |= B43_TXH_PHY_ANT3;392 break;393 default:394 B43_WARN_ON(1);395 }396 397 rates = info->control.rates;398 /* MAC control */399 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))400 mac_ctl |= B43_TXH_MAC_ACK;401 /* use hardware sequence counter as the non-TID counter */402 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)403 mac_ctl |= B43_TXH_MAC_HWSEQ;404 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)405 mac_ctl |= B43_TXH_MAC_STMSDU;406 if (!phy->gmode)407 mac_ctl |= B43_TXH_MAC_5GHZ;408 409 /* Overwrite rates[0].count to make the retry calculation410 * in the tx status easier. need the actual retry limit to411 * detect whether the fallback rate was used.412 */413 if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||414 (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {415 rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;416 mac_ctl |= B43_TXH_MAC_LONGFRAME;417 } else {418 rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;419 }420 421 /* Generate the RTS or CTS-to-self frame */422 if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||423 (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {424 unsigned int len;425 struct ieee80211_hdr *hdr;426 int rts_rate, rts_rate_fb;427 int rts_rate_ofdm, rts_rate_fb_ofdm;428 struct b43_plcp_hdr6 *plcp;429 struct ieee80211_rate *rts_cts_rate;430 431 rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info);432 433 rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB;434 rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);435 rts_rate_fb = b43_calc_fallback_rate(rts_rate, phy->gmode);436 rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);437 438 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {439 struct ieee80211_cts *cts;440 441 switch (dev->fw.hdr_format) {442 case B43_FW_HDR_598:443 cts = (struct ieee80211_cts *)444 (txhdr->format_598.rts_frame);445 break;446 case B43_FW_HDR_351:447 cts = (struct ieee80211_cts *)448 (txhdr->format_351.rts_frame);449 break;450 case B43_FW_HDR_410:451 cts = (struct ieee80211_cts *)452 (txhdr->format_410.rts_frame);453 break;454 }455 ieee80211_ctstoself_get(dev->wl->hw, info->control.vif,456 fragment_data, fragment_len,457 info, cts);458 mac_ctl |= B43_TXH_MAC_SENDCTS;459 len = sizeof(struct ieee80211_cts);460 } else {461 struct ieee80211_rts *rts;462 463 switch (dev->fw.hdr_format) {464 case B43_FW_HDR_598:465 rts = (struct ieee80211_rts *)466 (txhdr->format_598.rts_frame);467 break;468 case B43_FW_HDR_351:469 rts = (struct ieee80211_rts *)470 (txhdr->format_351.rts_frame);471 break;472 case B43_FW_HDR_410:473 rts = (struct ieee80211_rts *)474 (txhdr->format_410.rts_frame);475 break;476 }477 ieee80211_rts_get(dev->wl->hw, info->control.vif,478 fragment_data, fragment_len,479 info, rts);480 mac_ctl |= B43_TXH_MAC_SENDRTS;481 len = sizeof(struct ieee80211_rts);482 }483 len += FCS_LEN;484 485 /* Generate the PLCP headers for the RTS/CTS frame */486 switch (dev->fw.hdr_format) {487 case B43_FW_HDR_598:488 plcp = &txhdr->format_598.rts_plcp;489 break;490 case B43_FW_HDR_351:491 plcp = &txhdr->format_351.rts_plcp;492 break;493 case B43_FW_HDR_410:494 plcp = &txhdr->format_410.rts_plcp;495 break;496 }497 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,498 len, rts_rate);499 plcp = &txhdr->rts_plcp_fb;500 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,501 len, rts_rate_fb);502 503 switch (dev->fw.hdr_format) {504 case B43_FW_HDR_598:505 hdr = (struct ieee80211_hdr *)506 (&txhdr->format_598.rts_frame);507 break;508 case B43_FW_HDR_351:509 hdr = (struct ieee80211_hdr *)510 (&txhdr->format_351.rts_frame);511 break;512 case B43_FW_HDR_410:513 hdr = (struct ieee80211_hdr *)514 (&txhdr->format_410.rts_frame);515 break;516 }517 txhdr->rts_dur_fb = hdr->duration_id;518 519 if (rts_rate_ofdm) {520 extra_ft |= B43_TXH_EFT_RTS_OFDM;521 txhdr->phy_rate_rts =522 b43_plcp_get_ratecode_ofdm(rts_rate);523 } else {524 extra_ft |= B43_TXH_EFT_RTS_CCK;525 txhdr->phy_rate_rts =526 b43_plcp_get_ratecode_cck(rts_rate);527 }528 if (rts_rate_fb_ofdm)529 extra_ft |= B43_TXH_EFT_RTSFB_OFDM;530 else531 extra_ft |= B43_TXH_EFT_RTSFB_CCK;532 533 if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS &&534 fill_phy_ctl1) {535 txhdr->phy_ctl1_rts = cpu_to_le16(536 b43_generate_tx_phy_ctl1(dev, rts_rate));537 txhdr->phy_ctl1_rts_fb = cpu_to_le16(538 b43_generate_tx_phy_ctl1(dev, rts_rate_fb));539 }540 }541 542 /* Magic cookie */543 switch (dev->fw.hdr_format) {544 case B43_FW_HDR_598:545 txhdr->format_598.cookie = cpu_to_le16(cookie);546 break;547 case B43_FW_HDR_351:548 txhdr->format_351.cookie = cpu_to_le16(cookie);549 break;550 case B43_FW_HDR_410:551 txhdr->format_410.cookie = cpu_to_le16(cookie);552 break;553 }554 555 if (fill_phy_ctl1) {556 txhdr->phy_ctl1 =557 cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate));558 txhdr->phy_ctl1_fb =559 cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate_fb));560 }561 562 /* Apply the bitfields */563 txhdr->mac_ctl = cpu_to_le32(mac_ctl);564 txhdr->phy_ctl = cpu_to_le16(phy_ctl);565 txhdr->extra_ft = extra_ft;566 567 return 0;568}569 570static s8 b43_rssi_postprocess(struct b43_wldev *dev,571 u8 in_rssi, int ofdm,572 int adjust_2053, int adjust_2050)573{574 struct b43_phy *phy = &dev->phy;575 struct b43_phy_g *gphy = phy->g;576 s32 tmp;577 578 switch (phy->radio_ver) {579 case 0x2050:580 if (ofdm) {581 tmp = in_rssi;582 if (tmp > 127)583 tmp -= 256;584 tmp *= 73;585 tmp /= 64;586 if (adjust_2050)587 tmp += 25;588 else589 tmp -= 3;590 } else {591 if (dev->dev->bus_sprom->592 boardflags_lo & B43_BFL_RSSI) {593 if (in_rssi > 63)594 in_rssi = 63;595 B43_WARN_ON(phy->type != B43_PHYTYPE_G);596 tmp = gphy->nrssi_lt[in_rssi];597 tmp = 31 - tmp;598 tmp *= -131;599 tmp /= 128;600 tmp -= 57;601 } else {602 tmp = in_rssi;603 tmp = 31 - tmp;604 tmp *= -149;605 tmp /= 128;606 tmp -= 68;607 }608 if (phy->type == B43_PHYTYPE_G && adjust_2050)609 tmp += 25;610 }611 break;612 case 0x2060:613 if (in_rssi > 127)614 tmp = in_rssi - 256;615 else616 tmp = in_rssi;617 break;618 default:619 tmp = in_rssi;620 tmp -= 11;621 tmp *= 103;622 tmp /= 64;623 if (adjust_2053)624 tmp -= 109;625 else626 tmp -= 83;627 }628 629 return (s8) tmp;630}631 632void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)633{634 struct ieee80211_rx_status status;635 struct b43_plcp_hdr6 *plcp;636 struct ieee80211_hdr *wlhdr;637 const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;638 __le16 fctl;639 u16 phystat0, phystat3;640 u16 chanstat, mactime;641 u32 macstat;642 u16 chanid;643 int padding, rate_idx;644 645 memset(&status, 0, sizeof(status));646 647 /* Get metadata about the frame from the header. */648 phystat0 = le16_to_cpu(rxhdr->phy_status0);649 phystat3 = le16_to_cpu(rxhdr->phy_status3);650 switch (dev->fw.hdr_format) {651 case B43_FW_HDR_598:652 macstat = le32_to_cpu(rxhdr->format_598.mac_status);653 mactime = le16_to_cpu(rxhdr->format_598.mac_time);654 chanstat = le16_to_cpu(rxhdr->format_598.channel);655 break;656 case B43_FW_HDR_410:657 case B43_FW_HDR_351:658 macstat = le32_to_cpu(rxhdr->format_351.mac_status);659 mactime = le16_to_cpu(rxhdr->format_351.mac_time);660 chanstat = le16_to_cpu(rxhdr->format_351.channel);661 break;662 }663 664 if (unlikely(macstat & B43_RX_MAC_FCSERR)) {665 dev->wl->ieee_stats.dot11FCSErrorCount++;666 status.flag |= RX_FLAG_FAILED_FCS_CRC;667 }668 if (unlikely(phystat0 & (B43_RX_PHYST0_PLCPHCF | B43_RX_PHYST0_PLCPFV)))669 status.flag |= RX_FLAG_FAILED_PLCP_CRC;670 if (phystat0 & B43_RX_PHYST0_SHORTPRMBL)671 status.enc_flags |= RX_ENC_FLAG_SHORTPRE;672 if (macstat & B43_RX_MAC_DECERR) {673 /* Decryption with the given key failed.674 * Drop the packet. We also won't be able to decrypt it with675 * the key in software. */676 goto drop;677 }678 679 /* Skip PLCP and padding */680 padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;681 if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {682 b43dbg(dev->wl, "RX: Packet size underrun (1)\n");683 goto drop;684 }685 plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);686 skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);687 /* The skb contains the Wireless Header + payload data now */688 if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) {689 b43dbg(dev->wl, "RX: Packet size underrun (2)\n");690 goto drop;691 }692 wlhdr = (struct ieee80211_hdr *)(skb->data);693 fctl = wlhdr->frame_control;694 695 if (macstat & B43_RX_MAC_DEC) {696 unsigned int keyidx;697 int wlhdr_len;698 699 keyidx = ((macstat & B43_RX_MAC_KEYIDX)700 >> B43_RX_MAC_KEYIDX_SHIFT);701 /* We must adjust the key index here. We want the "physical"702 * key index, but the ucode passed it slightly different.703 */704 keyidx = b43_kidx_to_raw(dev, keyidx);705 B43_WARN_ON(keyidx >= ARRAY_SIZE(dev->key));706 707 if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {708 wlhdr_len = ieee80211_hdrlen(fctl);709 if (unlikely(skb->len < (wlhdr_len + 3))) {710 b43dbg(dev->wl,711 "RX: Packet size underrun (3)\n");712 goto drop;713 }714 status.flag |= RX_FLAG_DECRYPTED;715 }716 }717 718 /* Link quality statistics */719 switch (chanstat & B43_RX_CHAN_PHYTYPE) {720 case B43_PHYTYPE_HT:721 /* TODO: is max the right choice? */722 status.signal = max_t(__s8,723 max(rxhdr->phy_ht_power0, rxhdr->phy_ht_power1),724 rxhdr->phy_ht_power2);725 break;726 case B43_PHYTYPE_N:727 /* Broadcom has code for min and avg, but always uses max */728 if (rxhdr->power0 == 16 || rxhdr->power0 == 32)729 status.signal = max(rxhdr->power1, rxhdr->power2);730 else731 status.signal = max(rxhdr->power0, rxhdr->power1);732 break;733 case B43_PHYTYPE_B:734 case B43_PHYTYPE_G:735 case B43_PHYTYPE_LP:736 status.signal = b43_rssi_postprocess(dev, rxhdr->jssi,737 (phystat0 & B43_RX_PHYST0_OFDM),738 (phystat0 & B43_RX_PHYST0_GAINCTL),739 (phystat3 & B43_RX_PHYST3_TRSTATE));740 break;741 }742 743 if (phystat0 & B43_RX_PHYST0_OFDM)744 rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,745 !!(chanstat & B43_RX_CHAN_5GHZ));746 else747 rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);748 if (unlikely(rate_idx == -1)) {749 /* PLCP seems to be corrupted.750 * Drop the frame, if we are not interested in corrupted frames. */751 if (!(dev->wl->filter_flags & FIF_PLCPFAIL))752 goto drop;753 }754 status.rate_idx = rate_idx;755 status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);756 757 /*758 * All frames on monitor interfaces and beacons always need a full759 * 64-bit timestamp. Monitor interfaces need it for diagnostic760 * purposes and beacons for IBSS merging.761 * This code assumes we get to process the packet within 16 bits762 * of timestamp, i.e. about 65 milliseconds after the PHY received763 * the first symbol.764 */765 if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {766 u16 low_mactime_now;767 768 b43_tsf_read(dev, &status.mactime);769 low_mactime_now = status.mactime;770 status.mactime = status.mactime & ~0xFFFFULL;771 status.mactime += mactime;772 if (low_mactime_now <= mactime)773 status.mactime -= 0x10000;774 status.flag |= RX_FLAG_MACTIME_START;775 }776 777 chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;778 switch (chanstat & B43_RX_CHAN_PHYTYPE) {779 case B43_PHYTYPE_G:780 status.band = NL80211_BAND_2GHZ;781 /* Somewhere between 478.104 and 508.1084 firmware for G-PHY782 * has been modified to be compatible with N-PHY and others.783 */784 if (dev->fw.rev >= 508)785 status.freq = ieee80211_channel_to_frequency(chanid, status.band);786 else787 status.freq = chanid + 2400;788 break;789 case B43_PHYTYPE_N:790 case B43_PHYTYPE_LP:791 case B43_PHYTYPE_HT:792 /* chanid is the SHM channel cookie. Which is the plain793 * channel number in b43. */794 if (chanstat & B43_RX_CHAN_5GHZ)795 status.band = NL80211_BAND_5GHZ;796 else797 status.band = NL80211_BAND_2GHZ;798 status.freq =799 ieee80211_channel_to_frequency(chanid, status.band);800 break;801 default:802 B43_WARN_ON(1);803 goto drop;804 }805 806 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));807 ieee80211_rx_ni(dev->wl->hw, skb);808 809#if B43_DEBUG810 dev->rx_count++;811#endif812 return;813drop:814 dev_kfree_skb_any(skb);815}816 817void b43_handle_txstatus(struct b43_wldev *dev,818 const struct b43_txstatus *status)819{820 b43_debugfs_log_txstat(dev, status);821 822 if (status->intermediate)823 return;824 if (status->for_ampdu)825 return;826 if (!status->acked)827 dev->wl->ieee_stats.dot11ACKFailureCount++;828 if (status->rts_count) {829 if (status->rts_count == 0xF) //FIXME830 dev->wl->ieee_stats.dot11RTSFailureCount++;831 else832 dev->wl->ieee_stats.dot11RTSSuccessCount++;833 }834 835 if (b43_using_pio_transfers(dev))836 b43_pio_handle_txstatus(dev, status);837 else838 b43_dma_handle_txstatus(dev, status);839 840 b43_phy_txpower_check(dev, 0);841}842 843/* Fill out the mac80211 TXstatus report based on the b43-specific844 * txstatus report data. This returns a boolean whether the frame was845 * successfully transmitted. */846bool b43_fill_txstatus_report(struct b43_wldev *dev,847 struct ieee80211_tx_info *report,848 const struct b43_txstatus *status)849{850 bool frame_success = true;851 int retry_limit;852 853 /* preserve the confiured retry limit before clearing the status854 * The xmit function has overwritten the rc's value with the actual855 * retry limit done by the hardware */856 retry_limit = report->status.rates[0].count;857 ieee80211_tx_info_clear_status(report);858 859 if (status->acked) {860 /* The frame was ACKed. */861 report->flags |= IEEE80211_TX_STAT_ACK;862 } else {863 /* The frame was not ACKed... */864 if (!(report->flags & IEEE80211_TX_CTL_NO_ACK)) {865 /* ...but we expected an ACK. */866 frame_success = false;867 }868 }869 if (status->frame_count == 0) {870 /* The frame was not transmitted at all. */871 report->status.rates[0].count = 0;872 } else if (status->rts_count > dev->wl->hw->conf.short_frame_max_tx_count) {873 /*874 * If the short retries (RTS, not data frame) have exceeded875 * the limit, the hw will not have tried the selected rate,876 * but will have used the fallback rate instead.877 * Don't let the rate control count attempts for the selected878 * rate in this case, otherwise the statistics will be off.879 */880 report->status.rates[0].count = 0;881 report->status.rates[1].count = status->frame_count;882 } else {883 if (status->frame_count > retry_limit) {884 report->status.rates[0].count = retry_limit;885 report->status.rates[1].count = status->frame_count -886 retry_limit;887 888 } else {889 report->status.rates[0].count = status->frame_count;890 report->status.rates[1].idx = -1;891 }892 }893 894 return frame_success;895}896 897/* Stop any TX operation on the device (suspend the hardware queues) */898void b43_tx_suspend(struct b43_wldev *dev)899{900 if (b43_using_pio_transfers(dev))901 b43_pio_tx_suspend(dev);902 else903 b43_dma_tx_suspend(dev);904}905 906/* Resume any TX operation on the device (resume the hardware queues) */907void b43_tx_resume(struct b43_wldev *dev)908{909 if (b43_using_pio_transfers(dev))910 b43_pio_tx_resume(dev);911 else912 b43_dma_tx_resume(dev);913}914