drivers/net/wireless/b43/xmit.c

   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 <m@bues.ch>
  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 static const struct b43_tx_legacy_rate_phy_ctl_entry b43_tx_legacy_rate_phy_ctl[] = {
  36         { B43_CCK_RATE_1MB,     0x0,                    0x0 },
  37         { B43_CCK_RATE_2MB,     0x0,                    0x1 },
  38         { B43_CCK_RATE_5MB,     0x0,                    0x2 },
  39         { B43_CCK_RATE_11MB,    0x0,                    0x3 },
  40         { B43_OFDM_RATE_6MB,    B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_BPSK },
  41         { B43_OFDM_RATE_9MB,    B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_BPSK },
  42         { B43_OFDM_RATE_12MB,   B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QPSK },
  43         { B43_OFDM_RATE_18MB,   B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QPSK },
  44         { B43_OFDM_RATE_24MB,   B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QAM16 },
  45         { B43_OFDM_RATE_36MB,   B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM16 },
  46         { B43_OFDM_RATE_48MB,   B43_TXH_PHY1_CRATE_2_3, B43_TXH_PHY1_MODUL_QAM64 },
  47         { B43_OFDM_RATE_54MB,   B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM64 },
  48 };
  49
  50 static const struct b43_tx_legacy_rate_phy_ctl_entry *
  51 b43_tx_legacy_rate_phy_ctl_ent(u8 bitrate)
  52 {
  53         const struct b43_tx_legacy_rate_phy_ctl_entry *e;
  54         unsigned int i;
  55
  56         for (i = 0; i < ARRAY_SIZE(b43_tx_legacy_rate_phy_ctl); i++) {
  57                 e = &(b43_tx_legacy_rate_phy_ctl[i]);
  58                 if (e->bitrate == bitrate)
  59                         return e;
  60         }
  61
  62         B43_WARN_ON(1);
  63         return NULL;
  64 }
  65
  66 /* Extract the bitrate index out of a CCK PLCP header. */
  67 static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp)
  68 {
  69         switch (plcp->raw[0]) {
  70         case 0x0A:
  71                 return 0;
  72         case 0x14:
  73                 return 1;
  74         case 0x37:
  75                 return 2;
  76         case 0x6E:
  77                 return 3;
  78         }
  79         return -1;
  80 }
  81
  82 /* Extract the bitrate index out of an OFDM PLCP header. */
  83 static int b43_plcp_get_bitrate_idx_ofdm(struct b43_plcp_hdr6 *plcp, bool aphy)
  84 {
  85         int base = aphy ? 0 : 4;
  86
  87         switch (plcp->raw[0] & 0xF) {
  88         case 0xB:
  89                 return base + 0;
  90         case 0xF:
  91                 return base + 1;
  92         case 0xA:
  93                 return base + 2;
  94         case 0xE:
  95                 return base + 3;
  96         case 0x9:
  97                 return base + 4;
  98         case 0xD:
  99                 return base + 5;
 100         case 0x8:
 101                 return base + 6;
 102         case 0xC:
 103                 return base + 7;
 104         }
 105         return -1;
 106 }
 107
 108 u8 b43_plcp_get_ratecode_cck(const u8 bitrate)
 109 {
 110         switch (bitrate) {
 111         case B43_CCK_RATE_1MB:
 112                 return 0x0A;
 113         case B43_CCK_RATE_2MB:
 114                 return 0x14;
 115         case B43_CCK_RATE_5MB:
 116                 return 0x37;
 117         case B43_CCK_RATE_11MB:
 118                 return 0x6E;
 119         }
 120         B43_WARN_ON(1);
 121         return 0;
 122 }
 123
 124 u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)
 125 {
 126         switch (bitrate) {
 127         case B43_OFDM_RATE_6MB:
 128                 return 0xB;
 129         case B43_OFDM_RATE_9MB:
 130                 return 0xF;
 131         case B43_OFDM_RATE_12MB:
 132                 return 0xA;
 133         case B43_OFDM_RATE_18MB:
 134                 return 0xE;
 135         case B43_OFDM_RATE_24MB:
 136                 return 0x9;
 137         case B43_OFDM_RATE_36MB:
 138                 return 0xD;
 139         case B43_OFDM_RATE_48MB:
 140                 return 0x8;
 141         case B43_OFDM_RATE_54MB:
 142                 return 0xC;
 143         }
 144         B43_WARN_ON(1);
 145         return 0;
 146 }
 147
 148 void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
 149                            const u16 octets, const u8 bitrate)
 150 {
 151         __u8 *raw = plcp->raw;
 152
 153         if (b43_is_ofdm_rate(bitrate)) {
 154                 u32 d;
 155
 156                 d = b43_plcp_get_ratecode_ofdm(bitrate);
 157                 B43_WARN_ON(octets & 0xF000);
 158                 d |= (octets << 5);
 159                 plcp->data = cpu_to_le32(d);
 160         } else {
 161                 u32 plen;
 162
 163                 plen = octets * 16 / bitrate;
 164                 if ((octets * 16 % bitrate) > 0) {
 165                         plen++;
 166                         if ((bitrate == B43_CCK_RATE_11MB)
 167                             && ((octets * 8 % 11) < 4)) {
 168                                 raw[1] = 0x84;
 169                         } else
 170                                 raw[1] = 0x04;
 171                 } else
 172                         raw[1] = 0x04;
 173                 plcp->data |= cpu_to_le32(plen << 16);
 174                 raw[0] = b43_plcp_get_ratecode_cck(bitrate);
 175         }
 176 }
 177
 178 /* TODO: verify if needed for SSLPN or LCN  */
 179 static u16 b43_generate_tx_phy_ctl1(struct b43_wldev *dev, u8 bitrate)
 180 {
 181         const struct b43_phy *phy = &dev->phy;
 182         const struct b43_tx_legacy_rate_phy_ctl_entry *e;
 183         u16 control = 0;
 184         u16 bw;
 185
 186         if (phy->type == B43_PHYTYPE_LP)
 187                 bw = B43_TXH_PHY1_BW_20;
 188         else /* FIXME */
 189                 bw = B43_TXH_PHY1_BW_20;
 190
 191         if (0) { /* FIXME: MIMO */
 192         } else if (b43_is_cck_rate(bitrate) && phy->type != B43_PHYTYPE_LP) {
 193                 control = bw;
 194         } else {
 195                 control = bw;
 196                 e = b43_tx_legacy_rate_phy_ctl_ent(bitrate);
 197                 if (e) {
 198                         control |= e->coding_rate;
 199                         control |= e->modulation;
 200                 }
 201                 control |= B43_TXH_PHY1_MODE_SISO;
 202         }
 203
 204         return control;
 205 }
 206
 207 static u8 b43_calc_fallback_rate(u8 bitrate)
 208 {
 209         switch (bitrate) {
 210         case B43_CCK_RATE_1MB:
 211                 return B43_CCK_RATE_1MB;
 212         case B43_CCK_RATE_2MB:
 213                 return B43_CCK_RATE_1MB;
 214         case B43_CCK_RATE_5MB:
 215                 return B43_CCK_RATE_2MB;
 216         case B43_CCK_RATE_11MB:
 217                 return B43_CCK_RATE_5MB;
 218         case B43_OFDM_RATE_6MB:
 219                 return B43_CCK_RATE_5MB;
 220         case B43_OFDM_RATE_9MB:
 221                 return B43_OFDM_RATE_6MB;
 222         case B43_OFDM_RATE_12MB:
 223                 return B43_OFDM_RATE_9MB;
 224         case B43_OFDM_RATE_18MB:
 225                 return B43_OFDM_RATE_12MB;
 226         case B43_OFDM_RATE_24MB:
 227                 return B43_OFDM_RATE_18MB;
 228         case B43_OFDM_RATE_36MB:
 229                 return B43_OFDM_RATE_24MB;
 230         case B43_OFDM_RATE_48MB:
 231                 return B43_OFDM_RATE_36MB;
 232         case B43_OFDM_RATE_54MB:
 233                 return B43_OFDM_RATE_48MB;
 234         }
 235         B43_WARN_ON(1);
 236         return 0;
 237 }
 238
 239 /* Generate a TX data header. */
 240 int b43_generate_txhdr(struct b43_wldev *dev,
 241                        u8 *_txhdr,
 242                        struct sk_buff *skb_frag,
 243                        struct ieee80211_tx_info *info,
 244                        u16 cookie)
 245 {
 246         const unsigned char *fragment_data = skb_frag->data;
 247         unsigned int fragment_len = skb_frag->len;
 248         struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr;
 249         const struct b43_phy *phy = &dev->phy;
 250         const struct ieee80211_hdr *wlhdr =
 251             (const struct ieee80211_hdr *)fragment_data;
 252         int use_encryption = !!info->control.hw_key;
 253         __le16 fctl = wlhdr->frame_control;
 254         struct ieee80211_rate *fbrate;
 255         u8 rate, rate_fb;
 256         int rate_ofdm, rate_fb_ofdm;
 257         unsigned int plcp_fragment_len;
 258         u32 mac_ctl = 0;
 259         u16 phy_ctl = 0;
 260         bool fill_phy_ctl1 = (phy->type == B43_PHYTYPE_LP ||
 261                               phy->type == B43_PHYTYPE_N ||
 262                               phy->type == B43_PHYTYPE_HT);
 263         u8 extra_ft = 0;
 264         struct ieee80211_rate *txrate;
 265         struct ieee80211_tx_rate *rates;
 266
 267         memset(txhdr, 0, sizeof(*txhdr));
 268
 269         txrate = ieee80211_get_tx_rate(dev->wl->hw, info);
 270         rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;
 271         rate_ofdm = b43_is_ofdm_rate(rate);
 272         fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate;
 273         rate_fb = fbrate->hw_value;
 274         rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
 275
 276         if (rate_ofdm)
 277                 txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate);
 278         else
 279                 txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate);
 280         txhdr->mac_frame_ctl = wlhdr->frame_control;
 281         memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN);
 282
 283         /* Calculate duration for fallback rate */
 284         if ((rate_fb == rate) ||
 285             (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
 286             (wlhdr->duration_id == cpu_to_le16(0))) {
 287                 /* If the fallback rate equals the normal rate or the
 288                  * dur_id field contains an AID, CFP magic or 0,
 289                  * use the original dur_id field. */
 290                 txhdr->dur_fb = wlhdr->duration_id;
 291         } else {
 292                 txhdr->dur_fb = ieee80211_generic_frame_duration(
 293                         dev->wl->hw, info->control.vif, info->band,
 294                         fragment_len, fbrate);
 295         }
 296
 297         plcp_fragment_len = fragment_len + FCS_LEN;
 298         if (use_encryption) {
 299                 u8 key_idx = info->control.hw_key->hw_key_idx;
 300                 struct b43_key *key;
 301                 int wlhdr_len;
 302                 size_t iv_len;
 303
 304                 B43_WARN_ON(key_idx >= ARRAY_SIZE(dev->key));
 305                 key = &(dev->key[key_idx]);
 306
 307                 if (unlikely(!key->keyconf)) {
 308                         /* This key is invalid. This might only happen
 309                          * in a short timeframe after machine resume before
 310                          * we were able to reconfigure keys.
 311                          * Drop this packet completely. Do not transmit it
 312                          * unencrypted to avoid leaking information. */
 313                         return -ENOKEY;
 314                 }
 315
 316                 /* Hardware appends ICV. */
 317                 plcp_fragment_len += info->control.hw_key->icv_len;
 318
 319                 key_idx = b43_kidx_to_fw(dev, key_idx);
 320                 mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
 321                            B43_TXH_MAC_KEYIDX;
 322                 mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
 323                            B43_TXH_MAC_KEYALG;
 324                 wlhdr_len = ieee80211_hdrlen(fctl);
 325                 if (key->algorithm == B43_SEC_ALGO_TKIP) {
 326                         u16 phase1key[5];
 327                         int i;
 328                         /* we give the phase1key and iv16 here, the key is stored in
 329                          * shm. With that the hardware can do phase 2 and encryption.
 330                          */
 331                         ieee80211_get_tkip_p1k(info->control.hw_key, skb_frag, phase1key);
 332                         /* phase1key is in host endian. Copy to little-endian txhdr->iv. */
 333                         for (i = 0; i < 5; i++) {
 334                                 txhdr->iv[i * 2 + 0] = phase1key[i];
 335                                 txhdr->iv[i * 2 + 1] = phase1key[i] >> 8;
 336                         }
 337                         /* iv16 */
 338                         memcpy(txhdr->iv + 10, ((u8 *) wlhdr) + wlhdr_len, 3);
 339                 } else {
 340                         iv_len = min_t(size_t, info->control.hw_key->iv_len,
 341                                      ARRAY_SIZE(txhdr->iv));
 342                         memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
 343                 }
 344         }
 345         switch (dev->fw.hdr_format) {
 346         case B43_FW_HDR_598:
 347                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_598.plcp),
 348                                       plcp_fragment_len, rate);
 349                 break;
 350         case B43_FW_HDR_351:
 351                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_351.plcp),
 352                                       plcp_fragment_len, rate);
 353                 break;
 354         case B43_FW_HDR_410:
 355                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_410.plcp),
 356                                       plcp_fragment_len, rate);
 357                 break;
 358         }
 359         b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
 360                               plcp_fragment_len, rate_fb);
 361
 362         /* Extra Frame Types */
 363         if (rate_fb_ofdm)
 364                 extra_ft |= B43_TXH_EFT_FB_OFDM;
 365         else
 366                 extra_ft |= B43_TXH_EFT_FB_CCK;
 367
 368         /* Set channel radio code. Note that the micrcode ORs 0x100 to
 369          * this value before comparing it to the value in SHM, if this
 370          * is a 5Ghz packet.
 371          */
 372         txhdr->chan_radio_code = phy->channel;
 373
 374         /* PHY TX Control word */
 375         if (rate_ofdm)
 376                 phy_ctl |= B43_TXH_PHY_ENC_OFDM;
 377         else
 378                 phy_ctl |= B43_TXH_PHY_ENC_CCK;
 379         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 380                 phy_ctl |= B43_TXH_PHY_SHORTPRMBL;
 381
 382         switch (b43_ieee80211_antenna_sanitize(dev, 0)) {
 383         case 0: /* Default */
 384                 phy_ctl |= B43_TXH_PHY_ANT01AUTO;
 385                 break;
 386         case 1: /* Antenna 0 */
 387                 phy_ctl |= B43_TXH_PHY_ANT0;
 388                 break;
 389         case 2: /* Antenna 1 */
 390                 phy_ctl |= B43_TXH_PHY_ANT1;
 391                 break;
 392         case 3: /* Antenna 2 */
 393                 phy_ctl |= B43_TXH_PHY_ANT2;
 394                 break;
 395         case 4: /* Antenna 3 */
 396                 phy_ctl |= B43_TXH_PHY_ANT3;
 397                 break;
 398         default:
 399                 B43_WARN_ON(1);
 400         }
 401
 402         rates = info->control.rates;
 403         /* MAC control */
 404         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 405                 mac_ctl |= B43_TXH_MAC_ACK;
 406         /* use hardware sequence counter as the non-TID counter */
 407         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 408                 mac_ctl |= B43_TXH_MAC_HWSEQ;
 409         if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 410                 mac_ctl |= B43_TXH_MAC_STMSDU;
 411         if (!phy->gmode)
 412                 mac_ctl |= B43_TXH_MAC_5GHZ;
 413
 414         /* Overwrite rates[0].count to make the retry calculation
 415          * in the tx status easier. need the actual retry limit to
 416          * detect whether the fallback rate was used.
 417          */
 418         if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 419             (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
 420                 rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
 421                 mac_ctl |= B43_TXH_MAC_LONGFRAME;
 422         } else {
 423                 rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
 424         }
 425
 426         /* Generate the RTS or CTS-to-self frame */
 427         if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 428             (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
 429                 unsigned int len;
 430                 struct ieee80211_hdr *uninitialized_var(hdr);
 431                 int rts_rate, rts_rate_fb;
 432                 int rts_rate_ofdm, rts_rate_fb_ofdm;
 433                 struct b43_plcp_hdr6 *uninitialized_var(plcp);
 434                 struct ieee80211_rate *rts_cts_rate;
 435
 436                 rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info);
 437
 438                 rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB;
 439                 rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);
 440                 rts_rate_fb = b43_calc_fallback_rate(rts_rate);
 441                 rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);
 442
 443                 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 444                         struct ieee80211_cts *uninitialized_var(cts);
 445
 446                         switch (dev->fw.hdr_format) {
 447                         case B43_FW_HDR_598:
 448                                 cts = (struct ieee80211_cts *)
 449                                         (txhdr->format_598.rts_frame);
 450                                 break;
 451                         case B43_FW_HDR_351:
 452                                 cts = (struct ieee80211_cts *)
 453                                         (txhdr->format_351.rts_frame);
 454                                 break;
 455                         case B43_FW_HDR_410:
 456                                 cts = (struct ieee80211_cts *)
 457                                         (txhdr->format_410.rts_frame);
 458                                 break;
 459                         }
 460                         ieee80211_ctstoself_get(dev->wl->hw, info->control.vif,
 461                                                 fragment_data, fragment_len,
 462                                                 info, cts);
 463                         mac_ctl |= B43_TXH_MAC_SENDCTS;
 464                         len = sizeof(struct ieee80211_cts);
 465                 } else {
 466                         struct ieee80211_rts *uninitialized_var(rts);
 467
 468                         switch (dev->fw.hdr_format) {
 469                         case B43_FW_HDR_598:
 470                                 rts = (struct ieee80211_rts *)
 471                                         (txhdr->format_598.rts_frame);
 472                                 break;
 473                         case B43_FW_HDR_351:
 474                                 rts = (struct ieee80211_rts *)
 475                                         (txhdr->format_351.rts_frame);
 476                                 break;
 477                         case B43_FW_HDR_410:
 478                                 rts = (struct ieee80211_rts *)
 479                                         (txhdr->format_410.rts_frame);
 480                                 break;
 481                         }
 482                         ieee80211_rts_get(dev->wl->hw, info->control.vif,
 483                                           fragment_data, fragment_len,
 484                                           info, rts);
 485                         mac_ctl |= B43_TXH_MAC_SENDRTS;
 486                         len = sizeof(struct ieee80211_rts);
 487                 }
 488                 len += FCS_LEN;
 489
 490                 /* Generate the PLCP headers for the RTS/CTS frame */
 491                 switch (dev->fw.hdr_format) {
 492                 case B43_FW_HDR_598:
 493                         plcp = &txhdr->format_598.rts_plcp;
 494                         break;
 495                 case B43_FW_HDR_351:
 496                         plcp = &txhdr->format_351.rts_plcp;
 497                         break;
 498                 case B43_FW_HDR_410:
 499                         plcp = &txhdr->format_410.rts_plcp;
 500                         break;
 501                 }
 502                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
 503                                       len, rts_rate);
 504                 plcp = &txhdr->rts_plcp_fb;
 505                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
 506                                       len, rts_rate_fb);
 507
 508                 switch (dev->fw.hdr_format) {
 509                 case B43_FW_HDR_598:
 510                         hdr = (struct ieee80211_hdr *)
 511                                 (&txhdr->format_598.rts_frame);
 512                         break;
 513                 case B43_FW_HDR_351:
 514                         hdr = (struct ieee80211_hdr *)
 515                                 (&txhdr->format_351.rts_frame);
 516                         break;
 517                 case B43_FW_HDR_410:
 518                         hdr = (struct ieee80211_hdr *)
 519                                 (&txhdr->format_410.rts_frame);
 520                         break;
 521                 }
 522                 txhdr->rts_dur_fb = hdr->duration_id;
 523
 524                 if (rts_rate_ofdm) {
 525                         extra_ft |= B43_TXH_EFT_RTS_OFDM;
 526                         txhdr->phy_rate_rts =
 527                             b43_plcp_get_ratecode_ofdm(rts_rate);
 528                 } else {
 529                         extra_ft |= B43_TXH_EFT_RTS_CCK;
 530                         txhdr->phy_rate_rts =
 531                             b43_plcp_get_ratecode_cck(rts_rate);
 532                 }
 533                 if (rts_rate_fb_ofdm)
 534                         extra_ft |= B43_TXH_EFT_RTSFB_OFDM;
 535                 else
 536                         extra_ft |= B43_TXH_EFT_RTSFB_CCK;
 537
 538                 if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS &&
 539                     fill_phy_ctl1) {
 540                         txhdr->phy_ctl1_rts = cpu_to_le16(
 541                                 b43_generate_tx_phy_ctl1(dev, rts_rate));
 542                         txhdr->phy_ctl1_rts_fb = cpu_to_le16(
 543                                 b43_generate_tx_phy_ctl1(dev, rts_rate_fb));
 544                 }
 545         }
 546
 547         /* Magic cookie */
 548         switch (dev->fw.hdr_format) {
 549         case B43_FW_HDR_598:
 550                 txhdr->format_598.cookie = cpu_to_le16(cookie);
 551                 break;
 552         case B43_FW_HDR_351:
 553                 txhdr->format_351.cookie = cpu_to_le16(cookie);
 554                 break;
 555         case B43_FW_HDR_410:
 556                 txhdr->format_410.cookie = cpu_to_le16(cookie);
 557                 break;
 558         }
 559
 560         if (fill_phy_ctl1) {
 561                 txhdr->phy_ctl1 =
 562                         cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate));
 563                 txhdr->phy_ctl1_fb =
 564                         cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate_fb));
 565         }
 566
 567         /* Apply the bitfields */
 568         txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 569         txhdr->phy_ctl = cpu_to_le16(phy_ctl);
 570         txhdr->extra_ft = extra_ft;
 571
 572         return 0;
 573 }
 574
 575 static s8 b43_rssi_postprocess(struct b43_wldev *dev,
 576                                u8 in_rssi, int ofdm,
 577                                int adjust_2053, int adjust_2050)
 578 {
 579         struct b43_phy *phy = &dev->phy;
 580         struct b43_phy_g *gphy = phy->g;
 581         s32 tmp;
 582
 583         switch (phy->radio_ver) {
 584         case 0x2050:
 585                 if (ofdm) {
 586                         tmp = in_rssi;
 587                         if (tmp > 127)
 588                                 tmp -= 256;
 589                         tmp *= 73;
 590                         tmp /= 64;
 591                         if (adjust_2050)
 592                                 tmp += 25;
 593                         else
 594                                 tmp -= 3;
 595                 } else {
 596                         if (dev->dev->bus_sprom->
 597                             boardflags_lo & B43_BFL_RSSI) {
 598                                 if (in_rssi > 63)
 599                                         in_rssi = 63;
 600                                 B43_WARN_ON(phy->type != B43_PHYTYPE_G);
 601                                 tmp = gphy->nrssi_lt[in_rssi];
 602                                 tmp = 31 - tmp;
 603                                 tmp *= -131;
 604                                 tmp /= 128;
 605                                 tmp -= 57;
 606                         } else {
 607                                 tmp = in_rssi;
 608                                 tmp = 31 - tmp;
 609                                 tmp *= -149;
 610                                 tmp /= 128;
 611                                 tmp -= 68;
 612                         }
 613                         if (phy->type == B43_PHYTYPE_G && adjust_2050)
 614                                 tmp += 25;
 615                 }
 616                 break;
 617         case 0x2060:
 618                 if (in_rssi > 127)
 619                         tmp = in_rssi - 256;
 620                 else
 621                         tmp = in_rssi;
 622                 break;
 623         default:
 624                 tmp = in_rssi;
 625                 tmp -= 11;
 626                 tmp *= 103;
 627                 tmp /= 64;
 628                 if (adjust_2053)
 629                         tmp -= 109;
 630                 else
 631                         tmp -= 83;
 632         }
 633
 634         return (s8) tmp;
 635 }
 636
 637 //TODO
 638 #if 0
 639 static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi)
 640 {
 641         struct b43_phy *phy = &dev->phy;
 642         s8 ret;
 643
 644         if (phy->type == B43_PHYTYPE_A) {
 645                 //TODO: Incomplete specs.
 646                 ret = 0;
 647         } else
 648                 ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1);
 649
 650         return ret;
 651 }
 652 #endif
 653
 654 void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
 655 {
 656         struct ieee80211_rx_status status;
 657         struct b43_plcp_hdr6 *plcp;
 658         struct ieee80211_hdr *wlhdr;
 659         const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;
 660         __le16 fctl;
 661         u16 phystat0, phystat3;
 662         u16 uninitialized_var(chanstat), uninitialized_var(mactime);
 663         u32 uninitialized_var(macstat);
 664         u16 chanid;
 665         u16 phytype;
 666         int padding, rate_idx;
 667
 668         memset(&status, 0, sizeof(status));
 669
 670         /* Get metadata about the frame from the header. */
 671         phystat0 = le16_to_cpu(rxhdr->phy_status0);
 672         phystat3 = le16_to_cpu(rxhdr->phy_status3);
 673         switch (dev->fw.hdr_format) {
 674         case B43_FW_HDR_598:
 675                 macstat = le32_to_cpu(rxhdr->format_598.mac_status);
 676                 mactime = le16_to_cpu(rxhdr->format_598.mac_time);
 677                 chanstat = le16_to_cpu(rxhdr->format_598.channel);
 678                 break;
 679         case B43_FW_HDR_410:
 680         case B43_FW_HDR_351:
 681                 macstat = le32_to_cpu(rxhdr->format_351.mac_status);
 682                 mactime = le16_to_cpu(rxhdr->format_351.mac_time);
 683                 chanstat = le16_to_cpu(rxhdr->format_351.channel);
 684                 break;
 685         }
 686         phytype = chanstat & B43_RX_CHAN_PHYTYPE;
 687
 688         if (unlikely(macstat & B43_RX_MAC_FCSERR)) {
 689                 dev->wl->ieee_stats.dot11FCSErrorCount++;
 690                 status.flag |= RX_FLAG_FAILED_FCS_CRC;
 691         }
 692         if (unlikely(phystat0 & (B43_RX_PHYST0_PLCPHCF | B43_RX_PHYST0_PLCPFV)))
 693                 status.flag |= RX_FLAG_FAILED_PLCP_CRC;
 694         if (phystat0 & B43_RX_PHYST0_SHORTPRMBL)
 695                 status.flag |= RX_FLAG_SHORTPRE;
 696         if (macstat & B43_RX_MAC_DECERR) {
 697                 /* Decryption with the given key failed.
 698                  * Drop the packet. We also won't be able to decrypt it with
 699                  * the key in software. */
 700                 goto drop;
 701         }
 702
 703         /* Skip PLCP and padding */
 704         padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
 705         if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {
 706                 b43dbg(dev->wl, "RX: Packet size underrun (1)\n");
 707                 goto drop;
 708         }
 709         plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);
 710         skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);
 711         /* The skb contains the Wireless Header + payload data now */
 712         if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */  + FCS_LEN))) {
 713                 b43dbg(dev->wl, "RX: Packet size underrun (2)\n");
 714                 goto drop;
 715         }
 716         wlhdr = (struct ieee80211_hdr *)(skb->data);
 717         fctl = wlhdr->frame_control;
 718
 719         if (macstat & B43_RX_MAC_DEC) {
 720                 unsigned int keyidx;
 721                 int wlhdr_len;
 722
 723                 keyidx = ((macstat & B43_RX_MAC_KEYIDX)
 724                           >> B43_RX_MAC_KEYIDX_SHIFT);
 725                 /* We must adjust the key index here. We want the "physical"
 726                  * key index, but the ucode passed it slightly different.
 727                  */
 728                 keyidx = b43_kidx_to_raw(dev, keyidx);
 729                 B43_WARN_ON(keyidx >= ARRAY_SIZE(dev->key));
 730
 731                 if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
 732                         wlhdr_len = ieee80211_hdrlen(fctl);
 733                         if (unlikely(skb->len < (wlhdr_len + 3))) {
 734                                 b43dbg(dev->wl,
 735                                        "RX: Packet size underrun (3)\n");
 736                                 goto drop;
 737                         }
 738                         status.flag |= RX_FLAG_DECRYPTED;
 739                 }
 740         }
 741
 742         /* Link quality statistics */
 743         switch (chanstat & B43_RX_CHAN_PHYTYPE) {
 744         case B43_PHYTYPE_HT:
 745                 /* TODO: is max the right choice? */
 746                 status.signal = max_t(__s8,
 747                         max(rxhdr->phy_ht_power0, rxhdr->phy_ht_power1),
 748                         rxhdr->phy_ht_power2);
 749                 break;
 750         case B43_PHYTYPE_N:
 751                 /* Broadcom has code for min and avg, but always uses max */
 752                 if (rxhdr->power0 == 16 || rxhdr->power0 == 32)
 753                         status.signal = max(rxhdr->power1, rxhdr->power2);
 754                 else
 755                         status.signal = max(rxhdr->power0, rxhdr->power1);
 756                 break;
 757         case B43_PHYTYPE_A:
 758         case B43_PHYTYPE_B:
 759         case B43_PHYTYPE_G:
 760         case B43_PHYTYPE_LP:
 761                 status.signal = b43_rssi_postprocess(dev, rxhdr->jssi,
 762                                                   (phystat0 & B43_RX_PHYST0_OFDM),
 763                                                   (phystat0 & B43_RX_PHYST0_GAINCTL),
 764                                                   (phystat3 & B43_RX_PHYST3_TRSTATE));
 765                 break;
 766         }
 767
 768         if (phystat0 & B43_RX_PHYST0_OFDM)
 769                 rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,
 770                                                 phytype == B43_PHYTYPE_A);
 771         else
 772                 rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);
 773         if (unlikely(rate_idx == -1)) {
 774                 /* PLCP seems to be corrupted.
 775                  * Drop the frame, if we are not interested in corrupted frames. */
 776                 if (!(dev->wl->filter_flags & FIF_PLCPFAIL))
 777                         goto drop;
 778         }
 779         status.rate_idx = rate_idx;
 780         status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
 781
 782         /*
 783          * All frames on monitor interfaces and beacons always need a full
 784          * 64-bit timestamp. Monitor interfaces need it for diagnostic
 785          * purposes and beacons for IBSS merging.
 786          * This code assumes we get to process the packet within 16 bits
 787          * of timestamp, i.e. about 65 milliseconds after the PHY received
 788          * the first symbol.
 789          */
 790         if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
 791                 u16 low_mactime_now;
 792
 793                 b43_tsf_read(dev, &status.mactime);
 794                 low_mactime_now = status.mactime;
 795                 status.mactime = status.mactime & ~0xFFFFULL;
 796                 status.mactime += mactime;
 797                 if (low_mactime_now <= mactime)
 798                         status.mactime -= 0x10000;
 799                 status.flag |= RX_FLAG_MACTIME_START;
 800         }
 801
 802         chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
 803         switch (chanstat & B43_RX_CHAN_PHYTYPE) {
 804         case B43_PHYTYPE_A:
 805                 status.band = IEEE80211_BAND_5GHZ;
 806                 B43_WARN_ON(1);
 807                 /* FIXME: We don't really know which value the "chanid" contains.
 808                  *        So the following assignment might be wrong. */
 809                 status.freq =
 810                         ieee80211_channel_to_frequency(chanid, status.band);
 811                 break;
 812         case B43_PHYTYPE_G:
 813                 status.band = IEEE80211_BAND_2GHZ;
 814                 /* Somewhere between 478.104 and 508.1084 firmware for G-PHY
 815                  * has been modified to be compatible with N-PHY and others.
 816                  */
 817                 if (dev->fw.rev >= 508)
 818                         status.freq = ieee80211_channel_to_frequency(chanid, status.band);
 819                 else
 820                         status.freq = chanid + 2400;
 821                 break;
 822         case B43_PHYTYPE_N:
 823         case B43_PHYTYPE_LP:
 824         case B43_PHYTYPE_HT:
 825                 /* chanid is the SHM channel cookie. Which is the plain
 826                  * channel number in b43. */
 827                 if (chanstat & B43_RX_CHAN_5GHZ)
 828                         status.band = IEEE80211_BAND_5GHZ;
 829                 else
 830                         status.band = IEEE80211_BAND_2GHZ;
 831                 status.freq =
 832                         ieee80211_channel_to_frequency(chanid, status.band);
 833                 break;
 834         default:
 835                 B43_WARN_ON(1);
 836                 goto drop;
 837         }
 838
 839         memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
 840         ieee80211_rx_ni(dev->wl->hw, skb);
 841
 842 #if B43_DEBUG
 843         dev->rx_count++;
 844 #endif
 845         return;
 846 drop:
 847         dev_kfree_skb_any(skb);
 848 }
 849
 850 void b43_handle_txstatus(struct b43_wldev *dev,
 851                          const struct b43_txstatus *status)
 852 {
 853         b43_debugfs_log_txstat(dev, status);
 854
 855         if (status->intermediate)
 856                 return;
 857         if (status->for_ampdu)
 858                 return;
 859         if (!status->acked)
 860                 dev->wl->ieee_stats.dot11ACKFailureCount++;
 861         if (status->rts_count) {
 862                 if (status->rts_count == 0xF)   //FIXME
 863                         dev->wl->ieee_stats.dot11RTSFailureCount++;
 864                 else
 865                         dev->wl->ieee_stats.dot11RTSSuccessCount++;
 866         }
 867
 868         if (b43_using_pio_transfers(dev))
 869                 b43_pio_handle_txstatus(dev, status);
 870         else
 871                 b43_dma_handle_txstatus(dev, status);
 872
 873         b43_phy_txpower_check(dev, 0);
 874 }
 875
 876 /* Fill out the mac80211 TXstatus report based on the b43-specific
 877  * txstatus report data. This returns a boolean whether the frame was
 878  * successfully transmitted. */
 879 bool b43_fill_txstatus_report(struct b43_wldev *dev,
 880                               struct ieee80211_tx_info *report,
 881                               const struct b43_txstatus *status)
 882 {
 883         bool frame_success = true;
 884         int retry_limit;
 885
 886         /* preserve the confiured retry limit before clearing the status
 887          * The xmit function has overwritten the rc's value with the actual
 888          * retry limit done by the hardware */
 889         retry_limit = report->status.rates[0].count;
 890         ieee80211_tx_info_clear_status(report);
 891
 892         if (status->acked) {
 893                 /* The frame was ACKed. */
 894                 report->flags |= IEEE80211_TX_STAT_ACK;
 895         } else {
 896                 /* The frame was not ACKed... */
 897                 if (!(report->flags & IEEE80211_TX_CTL_NO_ACK)) {
 898                         /* ...but we expected an ACK. */
 899                         frame_success = false;
 900                 }
 901         }
 902         if (status->frame_count == 0) {
 903                 /* The frame was not transmitted at all. */
 904                 report->status.rates[0].count = 0;
 905         } else if (status->rts_count > dev->wl->hw->conf.short_frame_max_tx_count) {
 906                 /*
 907                  * If the short retries (RTS, not data frame) have exceeded
 908                  * the limit, the hw will not have tried the selected rate,
 909                  * but will have used the fallback rate instead.
 910                  * Don't let the rate control count attempts for the selected
 911                  * rate in this case, otherwise the statistics will be off.
 912                  */
 913                 report->status.rates[0].count = 0;
 914                 report->status.rates[1].count = status->frame_count;
 915         } else {
 916                 if (status->frame_count > retry_limit) {
 917                         report->status.rates[0].count = retry_limit;
 918                         report->status.rates[1].count = status->frame_count -
 919                                         retry_limit;
 920
 921                 } else {
 922                         report->status.rates[0].count = status->frame_count;
 923                         report->status.rates[1].idx = -1;
 924                 }
 925         }
 926
 927         return frame_success;
 928 }
 929
 930 /* Stop any TX operation on the device (suspend the hardware queues) */
 931 void b43_tx_suspend(struct b43_wldev *dev)
 932 {
 933         if (b43_using_pio_transfers(dev))
 934                 b43_pio_tx_suspend(dev);
 935         else
 936                 b43_dma_tx_suspend(dev);
 937 }
 938
 939 /* Resume any TX operation on the device (resume the hardware queues) */
 940 void b43_tx_resume(struct b43_wldev *dev)
 941 {
 942         if (b43_using_pio_transfers(dev))
 943                 b43_pio_tx_resume(dev);
 944         else
 945                 b43_dma_tx_resume(dev);
 946 }