xmit.c revision ce6c4a13927bc0418169fe543c6614abfab051eb
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> 8 Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it> 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_common.h" 32#include "dma.h" 33#include "pio.h" 34 35 36/* Extract the bitrate index out of a CCK PLCP header. */ 37static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp) 38{ 39 switch (plcp->raw[0]) { 40 case 0x0A: 41 return 0; 42 case 0x14: 43 return 1; 44 case 0x37: 45 return 2; 46 case 0x6E: 47 return 3; 48 } 49 return -1; 50} 51 52/* Extract the bitrate index out of an OFDM PLCP header. */ 53static int b43_plcp_get_bitrate_idx_ofdm(struct b43_plcp_hdr6 *plcp, bool aphy) 54{ 55 int base = aphy ? 0 : 4; 56 57 switch (plcp->raw[0] & 0xF) { 58 case 0xB: 59 return base + 0; 60 case 0xF: 61 return base + 1; 62 case 0xA: 63 return base + 2; 64 case 0xE: 65 return base + 3; 66 case 0x9: 67 return base + 4; 68 case 0xD: 69 return base + 5; 70 case 0x8: 71 return base + 6; 72 case 0xC: 73 return base + 7; 74 } 75 return -1; 76} 77 78u8 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 94u8 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 118void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp, 119 const u16 octets, const u8 bitrate) 120{ 121 __u8 *raw = plcp->raw; 122 123 if (b43_is_ofdm_rate(bitrate)) { 124 u32 d; 125 126 d = b43_plcp_get_ratecode_ofdm(bitrate); 127 B43_WARN_ON(octets & 0xF000); 128 d |= (octets << 5); 129 plcp->data = cpu_to_le32(d); 130 } else { 131 u32 plen; 132 133 plen = octets * 16 / bitrate; 134 if ((octets * 16 % bitrate) > 0) { 135 plen++; 136 if ((bitrate == B43_CCK_RATE_11MB) 137 && ((octets * 8 % 11) < 4)) { 138 raw[1] = 0x84; 139 } else 140 raw[1] = 0x04; 141 } else 142 raw[1] = 0x04; 143 plcp->data |= cpu_to_le32(plen << 16); 144 raw[0] = b43_plcp_get_ratecode_cck(bitrate); 145 } 146} 147 148static u8 b43_calc_fallback_rate(u8 bitrate) 149{ 150 switch (bitrate) { 151 case B43_CCK_RATE_1MB: 152 return B43_CCK_RATE_1MB; 153 case B43_CCK_RATE_2MB: 154 return B43_CCK_RATE_1MB; 155 case B43_CCK_RATE_5MB: 156 return B43_CCK_RATE_2MB; 157 case B43_CCK_RATE_11MB: 158 return B43_CCK_RATE_5MB; 159 case B43_OFDM_RATE_6MB: 160 return B43_CCK_RATE_5MB; 161 case B43_OFDM_RATE_9MB: 162 return B43_OFDM_RATE_6MB; 163 case B43_OFDM_RATE_12MB: 164 return B43_OFDM_RATE_9MB; 165 case B43_OFDM_RATE_18MB: 166 return B43_OFDM_RATE_12MB; 167 case B43_OFDM_RATE_24MB: 168 return B43_OFDM_RATE_18MB; 169 case B43_OFDM_RATE_36MB: 170 return B43_OFDM_RATE_24MB; 171 case B43_OFDM_RATE_48MB: 172 return B43_OFDM_RATE_36MB; 173 case B43_OFDM_RATE_54MB: 174 return B43_OFDM_RATE_48MB; 175 } 176 B43_WARN_ON(1); 177 return 0; 178} 179 180/* Generate a TX data header. */ 181int b43_generate_txhdr(struct b43_wldev *dev, 182 u8 *_txhdr, 183 struct sk_buff *skb_frag, 184 struct ieee80211_tx_info *info, 185 u16 cookie) 186{ 187 const unsigned char *fragment_data = skb_frag->data; 188 unsigned int fragment_len = skb_frag->len; 189 struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr; 190 const struct b43_phy *phy = &dev->phy; 191 const struct ieee80211_hdr *wlhdr = 192 (const struct ieee80211_hdr *)fragment_data; 193 int use_encryption = !!info->control.hw_key; 194 __le16 fctl = wlhdr->frame_control; 195 struct ieee80211_rate *fbrate; 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; 202 struct ieee80211_rate *txrate; 203 struct ieee80211_tx_rate *rates; 204 205 memset(txhdr, 0, sizeof(*txhdr)); 206 207 txrate = ieee80211_get_tx_rate(dev->wl->hw, info); 208 rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB; 209 rate_ofdm = b43_is_ofdm_rate(rate); 210 fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate; 211 rate_fb = fbrate->hw_value; 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 { 230 txhdr->dur_fb = ieee80211_generic_frame_duration( 231 dev->wl->hw, info->control.vif, fragment_len, fbrate); 232 } 233 234 plcp_fragment_len = fragment_len + FCS_LEN; 235 if (use_encryption) { 236 u8 key_idx = info->control.hw_key->hw_key_idx; 237 struct b43_key *key; 238 int wlhdr_len; 239 size_t iv_len; 240 241 B43_WARN_ON(key_idx >= ARRAY_SIZE(dev->key)); 242 key = &(dev->key[key_idx]); 243 244 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; 251 } 252 253 /* Hardware appends ICV. */ 254 plcp_fragment_len += info->control.hw_key->icv_len; 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; 261 wlhdr_len = ieee80211_hdrlen(fctl); 262 if (key->algorithm == B43_SEC_ALGO_TKIP) { 263 u16 phase1key[5]; 264 int i; 265 /* we give the phase1key and iv16 here, the key is stored in 266 * shm. With that the hardware can do phase 2 and encryption. 267 */ 268 ieee80211_get_tkip_key(info->control.hw_key, skb_frag, 269 IEEE80211_TKIP_P1_KEY, (u8*)phase1key); 270 /* phase1key is in host endian. Copy to little-endian txhdr->iv. */ 271 for (i = 0; i < 5; i++) { 272 txhdr->iv[i * 2 + 0] = phase1key[i]; 273 txhdr->iv[i * 2 + 1] = phase1key[i] >> 8; 274 } 275 /* iv16 */ 276 memcpy(txhdr->iv + 10, ((u8 *) wlhdr) + wlhdr_len, 3); 277 } else { 278 iv_len = min((size_t) info->control.hw_key->iv_len, 279 ARRAY_SIZE(txhdr->iv)); 280 memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len); 281 } 282 } 283 if (b43_is_old_txhdr_format(dev)) { 284 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->old_format.plcp), 285 plcp_fragment_len, rate); 286 } else { 287 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->new_format.plcp), 288 plcp_fragment_len, rate); 289 } 290 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb), 291 plcp_fragment_len, rate_fb); 292 293 /* Extra Frame Types */ 294 if (rate_fb_ofdm) 295 extra_ft |= B43_TXH_EFT_FB_OFDM; 296 else 297 extra_ft |= B43_TXH_EFT_FB_CCK; 298 299 /* Set channel radio code. Note that the micrcode ORs 0x100 to 300 * this value before comparing it to the value in SHM, if this 301 * is a 5Ghz packet. 302 */ 303 txhdr->chan_radio_code = phy->channel; 304 305 /* PHY TX Control word */ 306 if (rate_ofdm) 307 phy_ctl |= B43_TXH_PHY_ENC_OFDM; 308 else 309 phy_ctl |= B43_TXH_PHY_ENC_CCK; 310 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) 311 phy_ctl |= B43_TXH_PHY_SHORTPRMBL; 312 313 switch (b43_ieee80211_antenna_sanitize(dev, info->antenna_sel_tx)) { 314 case 0: /* Default */ 315 phy_ctl |= B43_TXH_PHY_ANT01AUTO; 316 break; 317 case 1: /* Antenna 0 */ 318 phy_ctl |= B43_TXH_PHY_ANT0; 319 break; 320 case 2: /* Antenna 1 */ 321 phy_ctl |= B43_TXH_PHY_ANT1; 322 break; 323 case 3: /* Antenna 2 */ 324 phy_ctl |= B43_TXH_PHY_ANT2; 325 break; 326 case 4: /* Antenna 3 */ 327 phy_ctl |= B43_TXH_PHY_ANT3; 328 break; 329 default: 330 B43_WARN_ON(1); 331 } 332 333 rates = info->control.rates; 334 /* MAC control */ 335 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 336 mac_ctl |= B43_TXH_MAC_ACK; 337 /* use hardware sequence counter as the non-TID counter */ 338 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 339 mac_ctl |= B43_TXH_MAC_HWSEQ; 340 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) 341 mac_ctl |= B43_TXH_MAC_STMSDU; 342 if (phy->type == B43_PHYTYPE_A) 343 mac_ctl |= B43_TXH_MAC_5GHZ; 344 345 /* Overwrite rates[0].count to make the retry calculation 346 * in the tx status easier. need the actual retry limit to 347 * detect whether the fallback rate was used. 348 */ 349 if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || 350 (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) { 351 rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count; 352 mac_ctl |= B43_TXH_MAC_LONGFRAME; 353 } else { 354 rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count; 355 } 356 357 /* Generate the RTS or CTS-to-self frame */ 358 if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || 359 (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) { 360 unsigned int len; 361 struct ieee80211_hdr *hdr; 362 int rts_rate, rts_rate_fb; 363 int rts_rate_ofdm, rts_rate_fb_ofdm; 364 struct b43_plcp_hdr6 *plcp; 365 struct ieee80211_rate *rts_cts_rate; 366 367 rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info); 368 369 rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB; 370 rts_rate_ofdm = b43_is_ofdm_rate(rts_rate); 371 rts_rate_fb = b43_calc_fallback_rate(rts_rate); 372 rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb); 373 374 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { 375 struct ieee80211_cts *cts; 376 377 if (b43_is_old_txhdr_format(dev)) { 378 cts = (struct ieee80211_cts *) 379 (txhdr->old_format.rts_frame); 380 } else { 381 cts = (struct ieee80211_cts *) 382 (txhdr->new_format.rts_frame); 383 } 384 ieee80211_ctstoself_get(dev->wl->hw, info->control.vif, 385 fragment_data, fragment_len, 386 info, cts); 387 mac_ctl |= B43_TXH_MAC_SENDCTS; 388 len = sizeof(struct ieee80211_cts); 389 } else { 390 struct ieee80211_rts *rts; 391 392 if (b43_is_old_txhdr_format(dev)) { 393 rts = (struct ieee80211_rts *) 394 (txhdr->old_format.rts_frame); 395 } else { 396 rts = (struct ieee80211_rts *) 397 (txhdr->new_format.rts_frame); 398 } 399 ieee80211_rts_get(dev->wl->hw, info->control.vif, 400 fragment_data, fragment_len, 401 info, rts); 402 mac_ctl |= B43_TXH_MAC_SENDRTS; 403 len = sizeof(struct ieee80211_rts); 404 } 405 len += FCS_LEN; 406 407 /* Generate the PLCP headers for the RTS/CTS frame */ 408 if (b43_is_old_txhdr_format(dev)) 409 plcp = &txhdr->old_format.rts_plcp; 410 else 411 plcp = &txhdr->new_format.rts_plcp; 412 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp, 413 len, rts_rate); 414 plcp = &txhdr->rts_plcp_fb; 415 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp, 416 len, rts_rate_fb); 417 418 if (b43_is_old_txhdr_format(dev)) { 419 hdr = (struct ieee80211_hdr *) 420 (&txhdr->old_format.rts_frame); 421 } else { 422 hdr = (struct ieee80211_hdr *) 423 (&txhdr->new_format.rts_frame); 424 } 425 txhdr->rts_dur_fb = hdr->duration_id; 426 427 if (rts_rate_ofdm) { 428 extra_ft |= B43_TXH_EFT_RTS_OFDM; 429 txhdr->phy_rate_rts = 430 b43_plcp_get_ratecode_ofdm(rts_rate); 431 } else { 432 extra_ft |= B43_TXH_EFT_RTS_CCK; 433 txhdr->phy_rate_rts = 434 b43_plcp_get_ratecode_cck(rts_rate); 435 } 436 if (rts_rate_fb_ofdm) 437 extra_ft |= B43_TXH_EFT_RTSFB_OFDM; 438 else 439 extra_ft |= B43_TXH_EFT_RTSFB_CCK; 440 } 441 442 /* Magic cookie */ 443 if (b43_is_old_txhdr_format(dev)) 444 txhdr->old_format.cookie = cpu_to_le16(cookie); 445 else 446 txhdr->new_format.cookie = cpu_to_le16(cookie); 447 448 /* Apply the bitfields */ 449 txhdr->mac_ctl = cpu_to_le32(mac_ctl); 450 txhdr->phy_ctl = cpu_to_le16(phy_ctl); 451 txhdr->extra_ft = extra_ft; 452 453 return 0; 454} 455 456static s8 b43_rssi_postprocess(struct b43_wldev *dev, 457 u8 in_rssi, int ofdm, 458 int adjust_2053, int adjust_2050) 459{ 460 struct b43_phy *phy = &dev->phy; 461 struct b43_phy_g *gphy = phy->g; 462 s32 tmp; 463 464 switch (phy->radio_ver) { 465 case 0x2050: 466 if (ofdm) { 467 tmp = in_rssi; 468 if (tmp > 127) 469 tmp -= 256; 470 tmp *= 73; 471 tmp /= 64; 472 if (adjust_2050) 473 tmp += 25; 474 else 475 tmp -= 3; 476 } else { 477 if (dev->dev->bus->sprom. 478 boardflags_lo & B43_BFL_RSSI) { 479 if (in_rssi > 63) 480 in_rssi = 63; 481 B43_WARN_ON(phy->type != B43_PHYTYPE_G); 482 tmp = gphy->nrssi_lt[in_rssi]; 483 tmp = 31 - tmp; 484 tmp *= -131; 485 tmp /= 128; 486 tmp -= 57; 487 } else { 488 tmp = in_rssi; 489 tmp = 31 - tmp; 490 tmp *= -149; 491 tmp /= 128; 492 tmp -= 68; 493 } 494 if (phy->type == B43_PHYTYPE_G && adjust_2050) 495 tmp += 25; 496 } 497 break; 498 case 0x2060: 499 if (in_rssi > 127) 500 tmp = in_rssi - 256; 501 else 502 tmp = in_rssi; 503 break; 504 default: 505 tmp = in_rssi; 506 tmp -= 11; 507 tmp *= 103; 508 tmp /= 64; 509 if (adjust_2053) 510 tmp -= 109; 511 else 512 tmp -= 83; 513 } 514 515 return (s8) tmp; 516} 517 518//TODO 519#if 0 520static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi) 521{ 522 struct b43_phy *phy = &dev->phy; 523 s8 ret; 524 525 if (phy->type == B43_PHYTYPE_A) { 526 //TODO: Incomplete specs. 527 ret = 0; 528 } else 529 ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1); 530 531 return ret; 532} 533#endif 534 535void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr) 536{ 537 struct ieee80211_rx_status status; 538 struct b43_plcp_hdr6 *plcp; 539 struct ieee80211_hdr *wlhdr; 540 const struct b43_rxhdr_fw4 *rxhdr = _rxhdr; 541 __le16 fctl; 542 u16 phystat0, phystat3, chanstat, mactime; 543 u32 macstat; 544 u16 chanid; 545 u16 phytype; 546 int padding; 547 548 memset(&status, 0, sizeof(status)); 549 550 /* Get metadata about the frame from the header. */ 551 phystat0 = le16_to_cpu(rxhdr->phy_status0); 552 phystat3 = le16_to_cpu(rxhdr->phy_status3); 553 macstat = le32_to_cpu(rxhdr->mac_status); 554 mactime = le16_to_cpu(rxhdr->mac_time); 555 chanstat = le16_to_cpu(rxhdr->channel); 556 phytype = chanstat & B43_RX_CHAN_PHYTYPE; 557 558 if (unlikely(macstat & B43_RX_MAC_FCSERR)) { 559 dev->wl->ieee_stats.dot11FCSErrorCount++; 560 status.flag |= RX_FLAG_FAILED_FCS_CRC; 561 } 562 if (unlikely(phystat0 & (B43_RX_PHYST0_PLCPHCF | B43_RX_PHYST0_PLCPFV))) 563 status.flag |= RX_FLAG_FAILED_PLCP_CRC; 564 if (phystat0 & B43_RX_PHYST0_SHORTPRMBL) 565 status.flag |= RX_FLAG_SHORTPRE; 566 if (macstat & B43_RX_MAC_DECERR) { 567 /* Decryption with the given key failed. 568 * Drop the packet. We also won't be able to decrypt it with 569 * the key in software. */ 570 goto drop; 571 } 572 573 /* Skip PLCP and padding */ 574 padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0; 575 if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) { 576 b43dbg(dev->wl, "RX: Packet size underrun (1)\n"); 577 goto drop; 578 } 579 plcp = (struct b43_plcp_hdr6 *)(skb->data + padding); 580 skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding); 581 /* The skb contains the Wireless Header + payload data now */ 582 if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) { 583 b43dbg(dev->wl, "RX: Packet size underrun (2)\n"); 584 goto drop; 585 } 586 wlhdr = (struct ieee80211_hdr *)(skb->data); 587 fctl = wlhdr->frame_control; 588 589 if (macstat & B43_RX_MAC_DEC) { 590 unsigned int keyidx; 591 int wlhdr_len; 592 593 keyidx = ((macstat & B43_RX_MAC_KEYIDX) 594 >> B43_RX_MAC_KEYIDX_SHIFT); 595 /* We must adjust the key index here. We want the "physical" 596 * key index, but the ucode passed it slightly different. 597 */ 598 keyidx = b43_kidx_to_raw(dev, keyidx); 599 B43_WARN_ON(keyidx >= ARRAY_SIZE(dev->key)); 600 601 if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) { 602 wlhdr_len = ieee80211_hdrlen(fctl); 603 if (unlikely(skb->len < (wlhdr_len + 3))) { 604 b43dbg(dev->wl, 605 "RX: Packet size underrun (3)\n"); 606 goto drop; 607 } 608 status.flag |= RX_FLAG_DECRYPTED; 609 } 610 } 611 612 /* Link quality statistics */ 613 status.noise = dev->stats.link_noise; 614 if ((chanstat & B43_RX_CHAN_PHYTYPE) == B43_PHYTYPE_N) { 615// s8 rssi = max(rxhdr->power0, rxhdr->power1); 616 //TODO: Find out what the rssi value is (dBm or percentage?) 617 // and also find out what the maximum possible value is. 618 // Fill status.ssi and status.signal fields. 619 } else { 620 status.signal = b43_rssi_postprocess(dev, rxhdr->jssi, 621 (phystat0 & B43_RX_PHYST0_OFDM), 622 (phystat0 & B43_RX_PHYST0_GAINCTL), 623 (phystat3 & B43_RX_PHYST3_TRSTATE)); 624 status.qual = (rxhdr->jssi * 100) / B43_RX_MAX_SSI; 625 } 626 627 if (phystat0 & B43_RX_PHYST0_OFDM) 628 status.rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp, 629 phytype == B43_PHYTYPE_A); 630 else 631 status.rate_idx = b43_plcp_get_bitrate_idx_cck(plcp); 632 if (unlikely(status.rate_idx == -1)) { 633 /* PLCP seems to be corrupted. 634 * Drop the frame, if we are not interested in corrupted frames. */ 635 if (!(dev->wl->filter_flags & FIF_PLCPFAIL)) 636 goto drop; 637 } 638 status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT); 639 640 /* 641 * All frames on monitor interfaces and beacons always need a full 642 * 64-bit timestamp. Monitor interfaces need it for diagnostic 643 * purposes and beacons for IBSS merging. 644 * This code assumes we get to process the packet within 16 bits 645 * of timestamp, i.e. about 65 milliseconds after the PHY received 646 * the first symbol. 647 */ 648 if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) { 649 u16 low_mactime_now; 650 651 b43_tsf_read(dev, &status.mactime); 652 low_mactime_now = status.mactime; 653 status.mactime = status.mactime & ~0xFFFFULL; 654 status.mactime += mactime; 655 if (low_mactime_now <= mactime) 656 status.mactime -= 0x10000; 657 status.flag |= RX_FLAG_TSFT; 658 } 659 660 chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT; 661 switch (chanstat & B43_RX_CHAN_PHYTYPE) { 662 case B43_PHYTYPE_A: 663 status.band = IEEE80211_BAND_5GHZ; 664 B43_WARN_ON(1); 665 /* FIXME: We don't really know which value the "chanid" contains. 666 * So the following assignment might be wrong. */ 667 status.freq = b43_channel_to_freq_5ghz(chanid); 668 break; 669 case B43_PHYTYPE_G: 670 status.band = IEEE80211_BAND_2GHZ; 671 /* chanid is the radio channel cookie value as used 672 * to tune the radio. */ 673 status.freq = chanid + 2400; 674 break; 675 case B43_PHYTYPE_N: 676 case B43_PHYTYPE_LP: 677 /* chanid is the SHM channel cookie. Which is the plain 678 * channel number in b43. */ 679 if (chanstat & B43_RX_CHAN_5GHZ) { 680 status.band = IEEE80211_BAND_5GHZ; 681 status.freq = b43_freq_to_channel_5ghz(chanid); 682 } else { 683 status.band = IEEE80211_BAND_2GHZ; 684 status.freq = b43_freq_to_channel_2ghz(chanid); 685 } 686 break; 687 default: 688 B43_WARN_ON(1); 689 goto drop; 690 } 691 692 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); 693 ieee80211_rx(dev->wl->hw, skb); 694 695 return; 696drop: 697 b43dbg(dev->wl, "RX: Packet dropped\n"); 698 dev_kfree_skb_any(skb); 699} 700 701void b43_handle_txstatus(struct b43_wldev *dev, 702 const struct b43_txstatus *status) 703{ 704 b43_debugfs_log_txstat(dev, status); 705 706 if (status->intermediate) 707 return; 708 if (status->for_ampdu) 709 return; 710 if (!status->acked) 711 dev->wl->ieee_stats.dot11ACKFailureCount++; 712 if (status->rts_count) { 713 if (status->rts_count == 0xF) //FIXME 714 dev->wl->ieee_stats.dot11RTSFailureCount++; 715 else 716 dev->wl->ieee_stats.dot11RTSSuccessCount++; 717 } 718 719 if (b43_using_pio_transfers(dev)) 720 b43_pio_handle_txstatus(dev, status); 721 else 722 b43_dma_handle_txstatus(dev, status); 723 724 b43_phy_txpower_check(dev, 0); 725} 726 727/* Fill out the mac80211 TXstatus report based on the b43-specific 728 * txstatus report data. This returns a boolean whether the frame was 729 * successfully transmitted. */ 730bool b43_fill_txstatus_report(struct b43_wldev *dev, 731 struct ieee80211_tx_info *report, 732 const struct b43_txstatus *status) 733{ 734 bool frame_success = 1; 735 int retry_limit; 736 737 /* preserve the confiured retry limit before clearing the status 738 * The xmit function has overwritten the rc's value with the actual 739 * retry limit done by the hardware */ 740 retry_limit = report->status.rates[0].count; 741 ieee80211_tx_info_clear_status(report); 742 743 if (status->acked) { 744 /* The frame was ACKed. */ 745 report->flags |= IEEE80211_TX_STAT_ACK; 746 } else { 747 /* The frame was not ACKed... */ 748 if (!(report->flags & IEEE80211_TX_CTL_NO_ACK)) { 749 /* ...but we expected an ACK. */ 750 frame_success = 0; 751 } 752 } 753 if (status->frame_count == 0) { 754 /* The frame was not transmitted at all. */ 755 report->status.rates[0].count = 0; 756 } else if (status->rts_count > dev->wl->hw->conf.short_frame_max_tx_count) { 757 /* 758 * If the short retries (RTS, not data frame) have exceeded 759 * the limit, the hw will not have tried the selected rate, 760 * but will have used the fallback rate instead. 761 * Don't let the rate control count attempts for the selected 762 * rate in this case, otherwise the statistics will be off. 763 */ 764 report->status.rates[0].count = 0; 765 report->status.rates[1].count = status->frame_count; 766 } else { 767 if (status->frame_count > retry_limit) { 768 report->status.rates[0].count = retry_limit; 769 report->status.rates[1].count = status->frame_count - 770 retry_limit; 771 772 } else { 773 report->status.rates[0].count = status->frame_count; 774 report->status.rates[1].idx = -1; 775 } 776 } 777 778 return frame_success; 779} 780 781/* Stop any TX operation on the device (suspend the hardware queues) */ 782void b43_tx_suspend(struct b43_wldev *dev) 783{ 784 if (b43_using_pio_transfers(dev)) 785 b43_pio_tx_suspend(dev); 786 else 787 b43_dma_tx_suspend(dev); 788} 789 790/* Resume any TX operation on the device (resume the hardware queues) */ 791void b43_tx_resume(struct b43_wldev *dev) 792{ 793 if (b43_using_pio_transfers(dev)) 794 b43_pio_tx_resume(dev); 795 else 796 b43_dma_tx_resume(dev); 797} 798