drivers/net/wireless/broadcom/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 ghz5)
  84 {
  85         /* For 2 GHz band first OFDM rate is at index 4, see main.c */
  86         int base = ghz5 ? 0 : 4;
  87
  88         switch (plcp->raw[0] & 0xF) {
  89         case 0xB:
  90                 return base + 0;
  91         case 0xF:
  92                 return base + 1;
  93         case 0xA:
  94                 return base + 2;
  95         case 0xE:
  96                 return base + 3;
  97         case 0x9:
  98                 return base + 4;
  99         case 0xD:
 100                 return base + 5;
 101         case 0x8:
 102                 return base + 6;
 103         case 0xC:
 104                 return base + 7;
 105         }
 106         return -1;
 107 }
 108
 109 u8 b43_plcp_get_ratecode_cck(const u8 bitrate)
 110 {
 111         switch (bitrate) {
 112         case B43_CCK_RATE_1MB:
 113                 return 0x0A;
 114         case B43_CCK_RATE_2MB:
 115                 return 0x14;
 116         case B43_CCK_RATE_5MB:
 117                 return 0x37;
 118         case B43_CCK_RATE_11MB:
 119                 return 0x6E;
 120         }
 121         B43_WARN_ON(1);
 122         return 0;
 123 }
 124
 125 u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)
 126 {
 127         switch (bitrate) {
 128         case B43_OFDM_RATE_6MB:
 129                 return 0xB;
 130         case B43_OFDM_RATE_9MB:
 131                 return 0xF;
 132         case B43_OFDM_RATE_12MB:
 133                 return 0xA;
 134         case B43_OFDM_RATE_18MB:
 135                 return 0xE;
 136         case B43_OFDM_RATE_24MB:
 137                 return 0x9;
 138         case B43_OFDM_RATE_36MB:
 139                 return 0xD;
 140         case B43_OFDM_RATE_48MB:
 141                 return 0x8;
 142         case B43_OFDM_RATE_54MB:
 143                 return 0xC;
 144         }
 145         B43_WARN_ON(1);
 146         return 0;
 147 }
 148
 149 void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
 150                            const u16 octets, const u8 bitrate)
 151 {
 152         __u8 *raw = plcp->raw;
 153
 154         if (b43_is_ofdm_rate(bitrate)) {
 155                 u32 d;
 156
 157                 d = b43_plcp_get_ratecode_ofdm(bitrate);
 158                 B43_WARN_ON(octets & 0xF000);
 159                 d |= (octets << 5);
 160                 plcp->data = cpu_to_le32(d);
 161         } else {
 162                 u32 plen;
 163
 164                 plen = octets * 16 / bitrate;
 165                 if ((octets * 16 % bitrate) > 0) {
 166                         plen++;
 167                         if ((bitrate == B43_CCK_RATE_11MB)
 168                             && ((octets * 8 % 11) < 4)) {
 169                                 raw[1] = 0x84;
 170                         } else
 171                                 raw[1] = 0x04;
 172                 } else
 173                         raw[1] = 0x04;
 174                 plcp->data |= cpu_to_le32(plen << 16);
 175                 raw[0] = b43_plcp_get_ratecode_cck(bitrate);
 176         }
 177 }
 178
 179 /* TODO: verify if needed for SSLPN or LCN  */
 180 static u16 b43_generate_tx_phy_ctl1(struct b43_wldev *dev, u8 bitrate)
 181 {
 182         const struct b43_phy *phy = &dev->phy;
 183         const struct b43_tx_legacy_rate_phy_ctl_entry *e;
 184         u16 control = 0;
 185         u16 bw;
 186
 187         if (phy->type == B43_PHYTYPE_LP)
 188                 bw = B43_TXH_PHY1_BW_20;
 189         else /* FIXME */
 190                 bw = B43_TXH_PHY1_BW_20;
 191
 192         if (0) { /* FIXME: MIMO */
 193         } else if (b43_is_cck_rate(bitrate) && phy->type != B43_PHYTYPE_LP) {
 194                 control = bw;
 195         } else {
 196                 control = bw;
 197                 e = b43_tx_legacy_rate_phy_ctl_ent(bitrate);
 198                 if (e) {
 199                         control |= e->coding_rate;
 200                         control |= e->modulation;
 201                 }
 202                 control |= B43_TXH_PHY1_MODE_SISO;
 203         }
 204
 205         return control;
 206 }
 207
 208 static u8 b43_calc_fallback_rate(u8 bitrate, int gmode)
 209 {
 210         switch (bitrate) {
 211         case B43_CCK_RATE_1MB:
 212                 return B43_CCK_RATE_1MB;
 213         case B43_CCK_RATE_2MB:
 214                 return B43_CCK_RATE_1MB;
 215         case B43_CCK_RATE_5MB:
 216                 return B43_CCK_RATE_2MB;
 217         case B43_CCK_RATE_11MB:
 218                 return B43_CCK_RATE_5MB;
 219         /*
 220          * Don't just fallback to CCK; it may be in 5GHz operation
 221          * and falling back to CCK won't work out very well.
 222          */
 223         case B43_OFDM_RATE_6MB:
 224                 if (gmode)
 225                         return B43_CCK_RATE_5MB;
 226                 else
 227                         return B43_OFDM_RATE_6MB;
 228         case B43_OFDM_RATE_9MB:
 229                 return B43_OFDM_RATE_6MB;
 230         case B43_OFDM_RATE_12MB:
 231                 return B43_OFDM_RATE_9MB;
 232         case B43_OFDM_RATE_18MB:
 233                 return B43_OFDM_RATE_12MB;
 234         case B43_OFDM_RATE_24MB:
 235                 return B43_OFDM_RATE_18MB;
 236         case B43_OFDM_RATE_36MB:
 237                 return B43_OFDM_RATE_24MB;
 238         case B43_OFDM_RATE_48MB:
 239                 return B43_OFDM_RATE_36MB;
 240         case B43_OFDM_RATE_54MB:
 241                 return B43_OFDM_RATE_48MB;
 242         }
 243         B43_WARN_ON(1);
 244         return 0;
 245 }
 246
 247 /* Generate a TX data header. */
 248 int b43_generate_txhdr(struct b43_wldev *dev,
 249                        u8 *_txhdr,
 250                        struct sk_buff *skb_frag,
 251                        struct ieee80211_tx_info *info,
 252                        u16 cookie)
 253 {
 254         const unsigned char *fragment_data = skb_frag->data;
 255         unsigned int fragment_len = skb_frag->len;
 256         struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr;
 257         const struct b43_phy *phy = &dev->phy;
 258         const struct ieee80211_hdr *wlhdr =
 259             (const struct ieee80211_hdr *)fragment_data;
 260         int use_encryption = !!info->control.hw_key;
 261         __le16 fctl = wlhdr->frame_control;
 262         struct ieee80211_rate *fbrate;
 263         u8 rate, rate_fb;
 264         int rate_ofdm, rate_fb_ofdm;
 265         unsigned int plcp_fragment_len;
 266         u32 mac_ctl = 0;
 267         u16 phy_ctl = 0;
 268         bool fill_phy_ctl1 = (phy->type == B43_PHYTYPE_LP ||
 269                               phy->type == B43_PHYTYPE_N ||
 270                               phy->type == B43_PHYTYPE_HT);
 271         u8 extra_ft = 0;
 272         struct ieee80211_rate *txrate;
 273         struct ieee80211_tx_rate *rates;
 274
 275         memset(txhdr, 0, sizeof(*txhdr));
 276
 277         txrate = ieee80211_get_tx_rate(dev->wl->hw, info);
 278         rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;
 279         rate_ofdm = b43_is_ofdm_rate(rate);
 280         fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate;
 281         rate_fb = fbrate->hw_value;
 282         rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
 283
 284         if (rate_ofdm)
 285                 txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate);
 286         else
 287                 txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate);
 288         txhdr->mac_frame_ctl = wlhdr->frame_control;
 289         memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN);
 290
 291         /* Calculate duration for fallback rate */
 292         if ((rate_fb == rate) ||
 293             (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
 294             (wlhdr->duration_id == cpu_to_le16(0))) {
 295                 /* If the fallback rate equals the normal rate or the
 296                  * dur_id field contains an AID, CFP magic or 0,
 297                  * use the original dur_id field. */
 298                 txhdr->dur_fb = wlhdr->duration_id;
 299         } else {
 300                 txhdr->dur_fb = ieee80211_generic_frame_duration(
 301                         dev->wl->hw, info->control.vif, info->band,
 302                         fragment_len, fbrate);
 303         }
 304
 305         plcp_fragment_len = fragment_len + FCS_LEN;
 306         if (use_encryption) {
 307                 u8 key_idx = info->control.hw_key->hw_key_idx;
 308                 struct b43_key *key;
 309                 int wlhdr_len;
 310                 size_t iv_len;
 311
 312                 B43_WARN_ON(key_idx >= ARRAY_SIZE(dev->key));
 313                 key = &(dev->key[key_idx]);
 314
 315                 if (unlikely(!key->keyconf)) {
 316                         /* This key is invalid. This might only happen
 317                          * in a short timeframe after machine resume before
 318                          * we were able to reconfigure keys.
 319                          * Drop this packet completely. Do not transmit it
 320                          * unencrypted to avoid leaking information. */
 321                         return -ENOKEY;
 322                 }
 323
 324                 /* Hardware appends ICV. */
 325                 plcp_fragment_len += info->control.hw_key->icv_len;
 326
 327                 key_idx = b43_kidx_to_fw(dev, key_idx);
 328                 mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
 329                            B43_TXH_MAC_KEYIDX;
 330                 mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
 331                            B43_TXH_MAC_KEYALG;
 332                 wlhdr_len = ieee80211_hdrlen(fctl);
 333                 if (key->algorithm == B43_SEC_ALGO_TKIP) {
 334                         u16 phase1key[5];
 335                         int i;
 336                         /* we give the phase1key and iv16 here, the key is stored in
 337                          * shm. With that the hardware can do phase 2 and encryption.
 338                          */
 339                         ieee80211_get_tkip_p1k(info->control.hw_key, skb_frag, phase1key);
 340                         /* phase1key is in host endian. Copy to little-endian txhdr->iv. */
 341                         for (i = 0; i < 5; i++) {
 342                                 txhdr->iv[i * 2 + 0] = phase1key[i];
 343                                 txhdr->iv[i * 2 + 1] = phase1key[i] >> 8;
 344                         }
 345                         /* iv16 */
 346                         memcpy(txhdr->iv + 10, ((u8 *) wlhdr) + wlhdr_len, 3);
 347                 } else {
 348                         iv_len = min_t(size_t, info->control.hw_key->iv_len,
 349                                      ARRAY_SIZE(txhdr->iv));
 350                         memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
 351                 }
 352         }
 353         switch (dev->fw.hdr_format) {
 354         case B43_FW_HDR_598:
 355                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_598.plcp),
 356                                       plcp_fragment_len, rate);
 357                 break;
 358         case B43_FW_HDR_351:
 359                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_351.plcp),
 360                                       plcp_fragment_len, rate);
 361                 break;
 362         case B43_FW_HDR_410:
 363                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_410.plcp),
 364                                       plcp_fragment_len, rate);
 365                 break;
 366         }
 367         b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
 368                               plcp_fragment_len, rate_fb);
 369
 370         /* Extra Frame Types */
 371         if (rate_fb_ofdm)
 372                 extra_ft |= B43_TXH_EFT_FB_OFDM;
 373         else
 374                 extra_ft |= B43_TXH_EFT_FB_CCK;
 375
 376         /* Set channel radio code. Note that the micrcode ORs 0x100 to
 377          * this value before comparing it to the value in SHM, if this
 378          * is a 5Ghz packet.
 379          */
 380         txhdr->chan_radio_code = phy->channel;
 381
 382         /* PHY TX Control word */
 383         if (rate_ofdm)
 384                 phy_ctl |= B43_TXH_PHY_ENC_OFDM;
 385         else
 386                 phy_ctl |= B43_TXH_PHY_ENC_CCK;
 387         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 388                 phy_ctl |= B43_TXH_PHY_SHORTPRMBL;
 389
 390         switch (b43_ieee80211_antenna_sanitize(dev, 0)) {
 391         case 0: /* Default */
 392                 phy_ctl |= B43_TXH_PHY_ANT01AUTO;
 393                 break;
 394         case 1: /* Antenna 0 */
 395                 phy_ctl |= B43_TXH_PHY_ANT0;
 396                 break;
 397         case 2: /* Antenna 1 */
 398                 phy_ctl |= B43_TXH_PHY_ANT1;
 399                 break;
 400         case 3: /* Antenna 2 */
 401                 phy_ctl |= B43_TXH_PHY_ANT2;
 402                 break;
 403         case 4: /* Antenna 3 */
 404                 phy_ctl |= B43_TXH_PHY_ANT3;
 405                 break;
 406         default:
 407                 B43_WARN_ON(1);
 408         }
 409
 410         rates = info->control.rates;
 411         /* MAC control */
 412         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 413                 mac_ctl |= B43_TXH_MAC_ACK;
 414         /* use hardware sequence counter as the non-TID counter */
 415         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 416                 mac_ctl |= B43_TXH_MAC_HWSEQ;
 417         if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 418                 mac_ctl |= B43_TXH_MAC_STMSDU;
 419         if (!phy->gmode)
 420                 mac_ctl |= B43_TXH_MAC_5GHZ;
 421
 422         /* Overwrite rates[0].count to make the retry calculation
 423          * in the tx status easier. need the actual retry limit to
 424          * detect whether the fallback rate was used.
 425          */
 426         if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 427             (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
 428                 rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
 429                 mac_ctl |= B43_TXH_MAC_LONGFRAME;
 430         } else {
 431                 rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
 432         }
 433
 434         /* Generate the RTS or CTS-to-self frame */
 435         if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 436             (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
 437                 unsigned int len;
 438                 struct ieee80211_hdr *uninitialized_var(hdr);
 439                 int rts_rate, rts_rate_fb;
 440                 int rts_rate_ofdm, rts_rate_fb_ofdm;
 441                 struct b43_plcp_hdr6 *uninitialized_var(plcp);
 442                 struct ieee80211_rate *rts_cts_rate;
 443
 444                 rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info);
 445
 446                 rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB;
 447                 rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);
 448                 rts_rate_fb = b43_calc_fallback_rate(rts_rate, phy->gmode);
 449                 rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);
 450
 451                 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 452                         struct ieee80211_cts *uninitialized_var(cts);
 453
 454                         switch (dev->fw.hdr_format) {
 455                         case B43_FW_HDR_598:
 456                                 cts = (struct ieee80211_cts *)
 457                                         (txhdr->format_598.rts_frame);
 458                                 break;
 459                         case B43_FW_HDR_351:
 460                                 cts = (struct ieee80211_cts *)
 461                                         (txhdr->format_351.rts_frame);
 462                                 break;
 463                         case B43_FW_HDR_410:
 464                                 cts = (struct ieee80211_cts *)
 465                                         (txhdr->format_410.rts_frame);
 466                                 break;
 467                         }
 468                         ieee80211_ctstoself_get(dev->wl->hw, info->control.vif,
 469                                                 fragment_data, fragment_len,
 470                                                 info, cts);
 471                         mac_ctl |= B43_TXH_MAC_SENDCTS;
 472                         len = sizeof(struct ieee80211_cts);
 473                 } else {
 474                         struct ieee80211_rts *uninitialized_var(rts);
 475
 476                         switch (dev->fw.hdr_format) {
 477                         case B43_FW_HDR_598:
 478                                 rts = (struct ieee80211_rts *)
 479                                         (txhdr->format_598.rts_frame);
 480                                 break;
 481                         case B43_FW_HDR_351:
 482                                 rts = (struct ieee80211_rts *)
 483                                         (txhdr->format_351.rts_frame);
 484                                 break;
 485                         case B43_FW_HDR_410:
 486                                 rts = (struct ieee80211_rts *)
 487                                         (txhdr->format_410.rts_frame);
 488                                 break;
 489                         }
 490                         ieee80211_rts_get(dev->wl->hw, info->control.vif,
 491                                           fragment_data, fragment_len,
 492                                           info, rts);
 493                         mac_ctl |= B43_TXH_MAC_SENDRTS;
 494                         len = sizeof(struct ieee80211_rts);
 495                 }
 496                 len += FCS_LEN;
 497
 498                 /* Generate the PLCP headers for the RTS/CTS frame */
 499                 switch (dev->fw.hdr_format) {
 500                 case B43_FW_HDR_598:
 501                         plcp = &txhdr->format_598.rts_plcp;
 502                         break;
 503                 case B43_FW_HDR_351:
 504                         plcp = &txhdr->format_351.rts_plcp;
 505                         break;
 506                 case B43_FW_HDR_410:
 507                         plcp = &txhdr->format_410.rts_plcp;
 508                         break;
 509                 }
 510                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
 511                                       len, rts_rate);
 512                 plcp = &txhdr->rts_plcp_fb;
 513                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
 514                                       len, rts_rate_fb);
 515
 516                 switch (dev->fw.hdr_format) {
 517                 case B43_FW_HDR_598:
 518                         hdr = (struct ieee80211_hdr *)
 519                                 (&txhdr->format_598.rts_frame);
 520                         break;
 521                 case B43_FW_HDR_351:
 522                         hdr = (struct ieee80211_hdr *)
 523                                 (&txhdr->format_351.rts_frame);
 524                         break;
 525                 case B43_FW_HDR_410:
 526                         hdr = (struct ieee80211_hdr *)
 527                                 (&txhdr->format_410.rts_frame);
 528                         break;
 529                 }
 530                 txhdr->rts_dur_fb = hdr->duration_id;
 531
 532                 if (rts_rate_ofdm) {
 533                         extra_ft |= B43_TXH_EFT_RTS_OFDM;
 534                         txhdr->phy_rate_rts =
 535                             b43_plcp_get_ratecode_ofdm(rts_rate);
 536                 } else {
 537                         extra_ft |= B43_TXH_EFT_RTS_CCK;
 538                         txhdr->phy_rate_rts =
 539                             b43_plcp_get_ratecode_cck(rts_rate);
 540                 }
 541                 if (rts_rate_fb_ofdm)
 542                         extra_ft |= B43_TXH_EFT_RTSFB_OFDM;
 543                 else
 544                         extra_ft |= B43_TXH_EFT_RTSFB_CCK;
 545
 546                 if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS &&
 547                     fill_phy_ctl1) {
 548                         txhdr->phy_ctl1_rts = cpu_to_le16(
 549                                 b43_generate_tx_phy_ctl1(dev, rts_rate));
 550                         txhdr->phy_ctl1_rts_fb = cpu_to_le16(
 551                                 b43_generate_tx_phy_ctl1(dev, rts_rate_fb));
 552                 }
 553         }
 554
 555         /* Magic cookie */
 556         switch (dev->fw.hdr_format) {
 557         case B43_FW_HDR_598:
 558                 txhdr->format_598.cookie = cpu_to_le16(cookie);
 559                 break;
 560         case B43_FW_HDR_351:
 561                 txhdr->format_351.cookie = cpu_to_le16(cookie);
 562                 break;
 563         case B43_FW_HDR_410:
 564                 txhdr->format_410.cookie = cpu_to_le16(cookie);
 565                 break;
 566         }
 567
 568         if (fill_phy_ctl1) {
 569                 txhdr->phy_ctl1 =
 570                         cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate));
 571                 txhdr->phy_ctl1_fb =
 572                         cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate_fb));
 573         }
 574
 575         /* Apply the bitfields */
 576         txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 577         txhdr->phy_ctl = cpu_to_le16(phy_ctl);
 578         txhdr->extra_ft = extra_ft;
 579
 580         return 0;
 581 }
 582
 583 static s8 b43_rssi_postprocess(struct b43_wldev *dev,
 584                                u8 in_rssi, int ofdm,
 585                                int adjust_2053, int adjust_2050)
 586 {
 587         struct b43_phy *phy = &dev->phy;
 588         struct b43_phy_g *gphy = phy->g;
 589         s32 tmp;
 590
 591         switch (phy->radio_ver) {
 592         case 0x2050:
 593                 if (ofdm) {
 594                         tmp = in_rssi;
 595                         if (tmp > 127)
 596                                 tmp -= 256;
 597                         tmp *= 73;
 598                         tmp /= 64;
 599                         if (adjust_2050)
 600                                 tmp += 25;
 601                         else
 602                                 tmp -= 3;
 603                 } else {
 604                         if (dev->dev->bus_sprom->
 605                             boardflags_lo & B43_BFL_RSSI) {
 606                                 if (in_rssi > 63)
 607                                         in_rssi = 63;
 608                                 B43_WARN_ON(phy->type != B43_PHYTYPE_G);
 609                                 tmp = gphy->nrssi_lt[in_rssi];
 610                                 tmp = 31 - tmp;
 611                                 tmp *= -131;
 612                                 tmp /= 128;
 613                                 tmp -= 57;
 614                         } else {
 615                                 tmp = in_rssi;
 616                                 tmp = 31 - tmp;
 617                                 tmp *= -149;
 618                                 tmp /= 128;
 619                                 tmp -= 68;
 620                         }
 621                         if (phy->type == B43_PHYTYPE_G && adjust_2050)
 622                                 tmp += 25;
 623                 }
 624                 break;
 625         case 0x2060:
 626                 if (in_rssi > 127)
 627                         tmp = in_rssi - 256;
 628                 else
 629                         tmp = in_rssi;
 630                 break;
 631         default:
 632                 tmp = in_rssi;
 633                 tmp -= 11;
 634                 tmp *= 103;
 635                 tmp /= 64;
 636                 if (adjust_2053)
 637                         tmp -= 109;
 638                 else
 639                         tmp -= 83;
 640         }
 641
 642         return (s8) tmp;
 643 }
 644
 645 //TODO
 646 #if 0
 647 static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi)
 648 {
 649         struct b43_phy *phy = &dev->phy;
 650         s8 ret;
 651
 652         ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1);
 653
 654         return ret;
 655 }
 656 #endif
 657
 658 void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
 659 {
 660         struct ieee80211_rx_status status;
 661         struct b43_plcp_hdr6 *plcp;
 662         struct ieee80211_hdr *wlhdr;
 663         const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;
 664         __le16 fctl;
 665         u16 phystat0, phystat3;
 666         u16 uninitialized_var(chanstat), uninitialized_var(mactime);
 667         u32 uninitialized_var(macstat);
 668         u16 chanid;
 669         int padding, rate_idx;
 670
 671         memset(&status, 0, sizeof(status));
 672
 673         /* Get metadata about the frame from the header. */
 674         phystat0 = le16_to_cpu(rxhdr->phy_status0);
 675         phystat3 = le16_to_cpu(rxhdr->phy_status3);
 676         switch (dev->fw.hdr_format) {
 677         case B43_FW_HDR_598:
 678                 macstat = le32_to_cpu(rxhdr->format_598.mac_status);
 679                 mactime = le16_to_cpu(rxhdr->format_598.mac_time);
 680                 chanstat = le16_to_cpu(rxhdr->format_598.channel);
 681                 break;
 682         case B43_FW_HDR_410:
 683         case B43_FW_HDR_351:
 684                 macstat = le32_to_cpu(rxhdr->format_351.mac_status);
 685                 mactime = le16_to_cpu(rxhdr->format_351.mac_time);
 686                 chanstat = le16_to_cpu(rxhdr->format_351.channel);
 687                 break;
 688         }
 689
 690         if (unlikely(macstat & B43_RX_MAC_FCSERR)) {
 691                 dev->wl->ieee_stats.dot11FCSErrorCount++;
 692                 status.flag |= RX_FLAG_FAILED_FCS_CRC;
 693         }
 694         if (unlikely(phystat0 & (B43_RX_PHYST0_PLCPHCF | B43_RX_PHYST0_PLCPFV)))
 695                 status.flag |= RX_FLAG_FAILED_PLCP_CRC;
 696         if (phystat0 & B43_RX_PHYST0_SHORTPRMBL)
 697                 status.flag |= RX_FLAG_SHORTPRE;
 698         if (macstat & B43_RX_MAC_DECERR) {
 699                 /* Decryption with the given key failed.
 700                  * Drop the packet. We also won't be able to decrypt it with
 701                  * the key in software. */
 702                 goto drop;
 703         }
 704
 705         /* Skip PLCP and padding */
 706         padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
 707         if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {
 708                 b43dbg(dev->wl, "RX: Packet size underrun (1)\n");
 709                 goto drop;
 710         }
 711         plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);
 712         skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);
 713         /* The skb contains the Wireless Header + payload data now */
 714         if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */  + FCS_LEN))) {
 715                 b43dbg(dev->wl, "RX: Packet size underrun (2)\n");
 716                 goto drop;
 717         }
 718         wlhdr = (struct ieee80211_hdr *)(skb->data);
 719         fctl = wlhdr->frame_control;
 720
 721         if (macstat & B43_RX_MAC_DEC) {
 722                 unsigned int keyidx;
 723                 int wlhdr_len;
 724
 725                 keyidx = ((macstat & B43_RX_MAC_KEYIDX)
 726                           >> B43_RX_MAC_KEYIDX_SHIFT);
 727                 /* We must adjust the key index here. We want the "physical"
 728                  * key index, but the ucode passed it slightly different.
 729                  */
 730                 keyidx = b43_kidx_to_raw(dev, keyidx);
 731                 B43_WARN_ON(keyidx >= ARRAY_SIZE(dev->key));
 732
 733                 if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
 734                         wlhdr_len = ieee80211_hdrlen(fctl);
 735                         if (unlikely(skb->len < (wlhdr_len + 3))) {
 736                                 b43dbg(dev->wl,
 737                                        "RX: Packet size underrun (3)\n");
 738                                 goto drop;
 739                         }
 740                         status.flag |= RX_FLAG_DECRYPTED;
 741                 }
 742         }
 743
 744         /* Link quality statistics */
 745         switch (chanstat & B43_RX_CHAN_PHYTYPE) {
 746         case B43_PHYTYPE_HT:
 747                 /* TODO: is max the right choice? */
 748                 status.signal = max_t(__s8,
 749                         max(rxhdr->phy_ht_power0, rxhdr->phy_ht_power1),
 750                         rxhdr->phy_ht_power2);
 751                 break;
 752         case B43_PHYTYPE_N:
 753                 /* Broadcom has code for min and avg, but always uses max */
 754                 if (rxhdr->power0 == 16 || rxhdr->power0 == 32)
 755                         status.signal = max(rxhdr->power1, rxhdr->power2);
 756                 else
 757                         status.signal = max(rxhdr->power0, rxhdr->power1);
 758                 break;
 759         case B43_PHYTYPE_B:
 760         case B43_PHYTYPE_G:
 761         case B43_PHYTYPE_LP:
 762                 status.signal = b43_rssi_postprocess(dev, rxhdr->jssi,
 763                                                   (phystat0 & B43_RX_PHYST0_OFDM),
 764                                                   (phystat0 & B43_RX_PHYST0_GAINCTL),
 765                                                   (phystat3 & B43_RX_PHYST3_TRSTATE));
 766                 break;
 767         }
 768
 769         if (phystat0 & B43_RX_PHYST0_OFDM)
 770                 rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,
 771                                         !!(chanstat & B43_RX_CHAN_5GHZ));
 772         else
 773                 rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);
 774         if (unlikely(rate_idx == -1)) {
 775                 /* PLCP seems to be corrupted.
 776                  * Drop the frame, if we are not interested in corrupted frames. */
 777                 if (!(dev->wl->filter_flags & FIF_PLCPFAIL))
 778                         goto drop;
 779         }
 780         status.rate_idx = rate_idx;
 781         status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
 782
 783         /*
 784          * All frames on monitor interfaces and beacons always need a full
 785          * 64-bit timestamp. Monitor interfaces need it for diagnostic
 786          * purposes and beacons for IBSS merging.
 787          * This code assumes we get to process the packet within 16 bits
 788          * of timestamp, i.e. about 65 milliseconds after the PHY received
 789          * the first symbol.
 790          */
 791         if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
 792                 u16 low_mactime_now;
 793
 794                 b43_tsf_read(dev, &status.mactime);
 795                 low_mactime_now = status.mactime;
 796                 status.mactime = status.mactime & ~0xFFFFULL;
 797                 status.mactime += mactime;
 798                 if (low_mactime_now <= mactime)
 799                         status.mactime -= 0x10000;
 800                 status.flag |= RX_FLAG_MACTIME_START;
 801         }
 802
 803         chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
 804         switch (chanstat & B43_RX_CHAN_PHYTYPE) {
 805         case B43_PHYTYPE_G:
 806                 status.band = NL80211_BAND_2GHZ;
 807                 /* Somewhere between 478.104 and 508.1084 firmware for G-PHY
 808                  * has been modified to be compatible with N-PHY and others.
 809                  */
 810                 if (dev->fw.rev >= 508)
 811                         status.freq = ieee80211_channel_to_frequency(chanid, status.band);
 812                 else
 813                         status.freq = chanid + 2400;
 814                 break;
 815         case B43_PHYTYPE_N:
 816         case B43_PHYTYPE_LP:
 817         case B43_PHYTYPE_HT:
 818                 /* chanid is the SHM channel cookie. Which is the plain
 819                  * channel number in b43. */
 820                 if (chanstat & B43_RX_CHAN_5GHZ)
 821                         status.band = NL80211_BAND_5GHZ;
 822                 else
 823                         status.band = NL80211_BAND_2GHZ;
 824                 status.freq =
 825                         ieee80211_channel_to_frequency(chanid, status.band);
 826                 break;
 827         default:
 828                 B43_WARN_ON(1);
 829                 goto drop;
 830         }
 831
 832         memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
 833         ieee80211_rx_ni(dev->wl->hw, skb);
 834
 835 #if B43_DEBUG
 836         dev->rx_count++;
 837 #endif
 838         return;
 839 drop:
 840         dev_kfree_skb_any(skb);
 841 }
 842
 843 void b43_handle_txstatus(struct b43_wldev *dev,
 844                          const struct b43_txstatus *status)
 845 {
 846         b43_debugfs_log_txstat(dev, status);
 847
 848         if (status->intermediate)
 849                 return;
 850         if (status->for_ampdu)
 851                 return;
 852         if (!status->acked)
 853                 dev->wl->ieee_stats.dot11ACKFailureCount++;
 854         if (status->rts_count) {
 855                 if (status->rts_count == 0xF)   //FIXME
 856                         dev->wl->ieee_stats.dot11RTSFailureCount++;
 857                 else
 858                         dev->wl->ieee_stats.dot11RTSSuccessCount++;
 859         }
 860
 861         if (b43_using_pio_transfers(dev))
 862                 b43_pio_handle_txstatus(dev, status);
 863         else
 864                 b43_dma_handle_txstatus(dev, status);
 865
 866         b43_phy_txpower_check(dev, 0);
 867 }
 868
 869 /* Fill out the mac80211 TXstatus report based on the b43-specific
 870  * txstatus report data. This returns a boolean whether the frame was
 871  * successfully transmitted. */
 872 bool b43_fill_txstatus_report(struct b43_wldev *dev,
 873                               struct ieee80211_tx_info *report,
 874                               const struct b43_txstatus *status)
 875 {
 876         bool frame_success = true;
 877         int retry_limit;
 878
 879         /* preserve the confiured retry limit before clearing the status
 880          * The xmit function has overwritten the rc's value with the actual
 881          * retry limit done by the hardware */
 882         retry_limit = report->status.rates[0].count;
 883         ieee80211_tx_info_clear_status(report);
 884
 885         if (status->acked) {
 886                 /* The frame was ACKed. */
 887                 report->flags |= IEEE80211_TX_STAT_ACK;
 888         } else {
 889                 /* The frame was not ACKed... */
 890                 if (!(report->flags & IEEE80211_TX_CTL_NO_ACK)) {
 891                         /* ...but we expected an ACK. */
 892                         frame_success = false;
 893                 }
 894         }
 895         if (status->frame_count == 0) {
 896                 /* The frame was not transmitted at all. */
 897                 report->status.rates[0].count = 0;
 898         } else if (status->rts_count > dev->wl->hw->conf.short_frame_max_tx_count) {
 899                 /*
 900                  * If the short retries (RTS, not data frame) have exceeded
 901                  * the limit, the hw will not have tried the selected rate,
 902                  * but will have used the fallback rate instead.
 903                  * Don't let the rate control count attempts for the selected
 904                  * rate in this case, otherwise the statistics will be off.
 905                  */
 906                 report->status.rates[0].count = 0;
 907                 report->status.rates[1].count = status->frame_count;
 908         } else {
 909                 if (status->frame_count > retry_limit) {
 910                         report->status.rates[0].count = retry_limit;
 911                         report->status.rates[1].count = status->frame_count -
 912                                         retry_limit;
 913
 914                 } else {
 915                         report->status.rates[0].count = status->frame_count;
 916                         report->status.rates[1].idx = -1;
 917                 }
 918         }
 919
 920         return frame_success;
 921 }
 922
 923 /* Stop any TX operation on the device (suspend the hardware queues) */
 924 void b43_tx_suspend(struct b43_wldev *dev)
 925 {
 926         if (b43_using_pio_transfers(dev))
 927                 b43_pio_tx_suspend(dev);
 928         else
 929                 b43_dma_tx_suspend(dev);
 930 }
 931
 932 /* Resume any TX operation on the device (resume the hardware queues) */
 933 void b43_tx_resume(struct b43_wldev *dev)
 934 {
 935         if (b43_using_pio_transfers(dev))
 936                 b43_pio_tx_resume(dev);
 937         else
 938                 b43_dma_tx_resume(dev);
 939 }