drivers/net/wireless/b43legacy/xmit.c

   1 /*
   2
   3   Broadcom B43legacy 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   Copyright (C) 2007 Larry Finger <Larry.Finger@lwfinger.net>
  13
  14   This program is free software; you can redistribute it and/or modify
  15   it under the terms of the GNU General Public License as published by
  16   the Free Software Foundation; either version 2 of the License, or
  17   (at your option) any later version.
  18
  19   This program is distributed in the hope that it will be useful,
  20   but WITHOUT ANY WARRANTY; without even the implied warranty of
  21   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22   GNU General Public License for more details.
  23
  24   You should have received a copy of the GNU General Public License
  25   along with this program; see the file COPYING.  If not, write to
  26   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  27   Boston, MA 02110-1301, USA.
  28
  29 */
  30
  31 #include <net/dst.h>
  32
  33 #include "xmit.h"
  34 #include "phy.h"
  35 #include "dma.h"
  36 #include "pio.h"
  37
  38
  39 /* Extract the bitrate out of a CCK PLCP header. */
  40 static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
  41 {
  42         switch (plcp->raw[0]) {
  43         case 0x0A:
  44                 return 0;
  45         case 0x14:
  46                 return 1;
  47         case 0x37:
  48                 return 2;
  49         case 0x6E:
  50                 return 3;
  51         }
  52         B43legacy_BUG_ON(1);
  53         return -1;
  54 }
  55
  56 /* Extract the bitrate out of an OFDM PLCP header. */
  57 static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
  58                                               bool aphy)
  59 {
  60         int base = aphy ? 0 : 4;
  61
  62         switch (plcp->raw[0] & 0xF) {
  63         case 0xB:
  64                 return base + 0;
  65         case 0xF:
  66                 return base + 1;
  67         case 0xA:
  68                 return base + 2;
  69         case 0xE:
  70                 return base + 3;
  71         case 0x9:
  72                 return base + 4;
  73         case 0xD:
  74                 return base + 5;
  75         case 0x8:
  76                 return base + 6;
  77         case 0xC:
  78                 return base + 7;
  79         }
  80         B43legacy_BUG_ON(1);
  81         return -1;
  82 }
  83
  84 u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
  85 {
  86         switch (bitrate) {
  87         case B43legacy_CCK_RATE_1MB:
  88                 return 0x0A;
  89         case B43legacy_CCK_RATE_2MB:
  90                 return 0x14;
  91         case B43legacy_CCK_RATE_5MB:
  92                 return 0x37;
  93         case B43legacy_CCK_RATE_11MB:
  94                 return 0x6E;
  95         }
  96         B43legacy_BUG_ON(1);
  97         return 0;
  98 }
  99
 100 u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
 101 {
 102         switch (bitrate) {
 103         case B43legacy_OFDM_RATE_6MB:
 104                 return 0xB;
 105         case B43legacy_OFDM_RATE_9MB:
 106                 return 0xF;
 107         case B43legacy_OFDM_RATE_12MB:
 108                 return 0xA;
 109         case B43legacy_OFDM_RATE_18MB:
 110                 return 0xE;
 111         case B43legacy_OFDM_RATE_24MB:
 112                 return 0x9;
 113         case B43legacy_OFDM_RATE_36MB:
 114                 return 0xD;
 115         case B43legacy_OFDM_RATE_48MB:
 116                 return 0x8;
 117         case B43legacy_OFDM_RATE_54MB:
 118                 return 0xC;
 119         }
 120         B43legacy_BUG_ON(1);
 121         return 0;
 122 }
 123
 124 void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
 125                                  const u16 octets, const u8 bitrate)
 126 {
 127         __le32 *data = &(plcp->data);
 128         __u8 *raw = plcp->raw;
 129
 130         if (b43legacy_is_ofdm_rate(bitrate)) {
 131                 u16 d;
 132
 133                 d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
 134                 B43legacy_WARN_ON(octets & 0xF000);
 135                 d |= (octets << 5);
 136                 *data = cpu_to_le32(d);
 137         } else {
 138                 u32 plen;
 139
 140                 plen = octets * 16 / bitrate;
 141                 if ((octets * 16 % bitrate) > 0) {
 142                         plen++;
 143                         if ((bitrate == B43legacy_CCK_RATE_11MB)
 144                             && ((octets * 8 % 11) < 4))
 145                                 raw[1] = 0x84;
 146                         else
 147                                 raw[1] = 0x04;
 148                 } else
 149                         raw[1] = 0x04;
 150                 *data |= cpu_to_le32(plen << 16);
 151                 raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
 152         }
 153 }
 154
 155 static u8 b43legacy_calc_fallback_rate(u8 bitrate)
 156 {
 157         switch (bitrate) {
 158         case B43legacy_CCK_RATE_1MB:
 159                 return B43legacy_CCK_RATE_1MB;
 160         case B43legacy_CCK_RATE_2MB:
 161                 return B43legacy_CCK_RATE_1MB;
 162         case B43legacy_CCK_RATE_5MB:
 163                 return B43legacy_CCK_RATE_2MB;
 164         case B43legacy_CCK_RATE_11MB:
 165                 return B43legacy_CCK_RATE_5MB;
 166         case B43legacy_OFDM_RATE_6MB:
 167                 return B43legacy_CCK_RATE_5MB;
 168         case B43legacy_OFDM_RATE_9MB:
 169                 return B43legacy_OFDM_RATE_6MB;
 170         case B43legacy_OFDM_RATE_12MB:
 171                 return B43legacy_OFDM_RATE_9MB;
 172         case B43legacy_OFDM_RATE_18MB:
 173                 return B43legacy_OFDM_RATE_12MB;
 174         case B43legacy_OFDM_RATE_24MB:
 175                 return B43legacy_OFDM_RATE_18MB;
 176         case B43legacy_OFDM_RATE_36MB:
 177                 return B43legacy_OFDM_RATE_24MB;
 178         case B43legacy_OFDM_RATE_48MB:
 179                 return B43legacy_OFDM_RATE_36MB;
 180         case B43legacy_OFDM_RATE_54MB:
 181                 return B43legacy_OFDM_RATE_48MB;
 182         }
 183         B43legacy_BUG_ON(1);
 184         return 0;
 185 }
 186
 187 static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
 188                                struct b43legacy_txhdr_fw3 *txhdr,
 189                                const unsigned char *fragment_data,
 190                                unsigned int fragment_len,
 191                                const struct ieee80211_tx_control *txctl,
 192                                u16 cookie)
 193 {
 194         const struct ieee80211_hdr *wlhdr;
 195         int use_encryption = (!(txctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT));
 196         u16 fctl;
 197         u8 rate;
 198         struct ieee80211_rate *rate_fb;
 199         int rate_ofdm;
 200         int rate_fb_ofdm;
 201         unsigned int plcp_fragment_len;
 202         u32 mac_ctl = 0;
 203         u16 phy_ctl = 0;
 204
 205         wlhdr = (const struct ieee80211_hdr *)fragment_data;
 206         fctl = le16_to_cpu(wlhdr->frame_control);
 207
 208         memset(txhdr, 0, sizeof(*txhdr));
 209
 210         rate = txctl->tx_rate->hw_value;
 211         rate_ofdm = b43legacy_is_ofdm_rate(rate);
 212         rate_fb = txctl->alt_retry_rate ? : txctl->tx_rate;
 213         rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
 214
 215         txhdr->mac_frame_ctl = wlhdr->frame_control;
 216         memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
 217
 218         /* Calculate duration for fallback rate */
 219         if ((rate_fb->hw_value == rate) ||
 220             (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
 221             (wlhdr->duration_id == cpu_to_le16(0))) {
 222                 /* If the fallback rate equals the normal rate or the
 223                  * dur_id field contains an AID, CFP magic or 0,
 224                  * use the original dur_id field. */
 225                 txhdr->dur_fb = wlhdr->duration_id;
 226         } else {
 227                 txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
 228                                                          txctl->vif,
 229                                                          fragment_len,
 230                                                          rate_fb);
 231         }
 232
 233         plcp_fragment_len = fragment_len + FCS_LEN;
 234         if (use_encryption) {
 235                 u8 key_idx = (u16)(txctl->key_idx);
 236                 struct b43legacy_key *key;
 237                 int wlhdr_len;
 238                 size_t iv_len;
 239
 240                 B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
 241                 key = &(dev->key[key_idx]);
 242
 243                 if (key->enabled) {
 244                         /* Hardware appends ICV. */
 245                         plcp_fragment_len += txctl->icv_len;
 246
 247                         key_idx = b43legacy_kidx_to_fw(dev, key_idx);
 248                         mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
 249                                    B43legacy_TX4_MAC_KEYIDX;
 250                         mac_ctl |= (key->algorithm <<
 251                                    B43legacy_TX4_MAC_KEYALG_SHIFT) &
 252                                    B43legacy_TX4_MAC_KEYALG;
 253                         wlhdr_len = ieee80211_get_hdrlen(fctl);
 254                         iv_len = min((size_t)txctl->iv_len,
 255                                      ARRAY_SIZE(txhdr->iv));
 256                         memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
 257                 } else {
 258                         /* This key is invalid. This might only happen
 259                          * in a short timeframe after machine resume before
 260                          * we were able to reconfigure keys.
 261                          * Drop this packet completely. Do not transmit it
 262                          * unencrypted to avoid leaking information. */
 263                         return -ENOKEY;
 264                 }
 265         }
 266         b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 267                                     (&txhdr->plcp), plcp_fragment_len,
 268                                     rate);
 269         b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 270                                     (&txhdr->plcp_fb), plcp_fragment_len,
 271                                     rate_fb->hw_value);
 272
 273         /* PHY TX Control word */
 274         if (rate_ofdm)
 275                 phy_ctl |= B43legacy_TX4_PHY_OFDM;
 276         if (dev->short_preamble)
 277                 phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
 278         switch (txctl->antenna_sel_tx) {
 279         case 0:
 280                 phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
 281                 break;
 282         case 1:
 283                 phy_ctl |= B43legacy_TX4_PHY_ANT0;
 284                 break;
 285         case 2:
 286                 phy_ctl |= B43legacy_TX4_PHY_ANT1;
 287                 break;
 288         default:
 289                 B43legacy_BUG_ON(1);
 290         }
 291
 292         /* MAC control */
 293         if (!(txctl->flags & IEEE80211_TXCTL_NO_ACK))
 294                 mac_ctl |= B43legacy_TX4_MAC_ACK;
 295         if (!(((fctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
 296               ((fctl & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)))
 297                 mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
 298         if (txctl->flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
 299                 mac_ctl |= B43legacy_TX4_MAC_STMSDU;
 300         if (rate_fb_ofdm)
 301                 mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
 302         if (txctl->flags & IEEE80211_TXCTL_LONG_RETRY_LIMIT)
 303                 mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
 304
 305         /* Generate the RTS or CTS-to-self frame */
 306         if ((txctl->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
 307             (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
 308                 unsigned int len;
 309                 struct ieee80211_hdr *hdr;
 310                 int rts_rate;
 311                 int rts_rate_fb;
 312                 int rts_rate_ofdm;
 313                 int rts_rate_fb_ofdm;
 314
 315                 rts_rate = txctl->rts_cts_rate->hw_value;
 316                 rts_rate_ofdm = b43legacy_is_ofdm_rate(rts_rate);
 317                 rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
 318                 rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
 319                 if (rts_rate_fb_ofdm)
 320                         mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
 321
 322                 if (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
 323                         ieee80211_ctstoself_get(dev->wl->hw,
 324                                                 txctl->vif,
 325                                                 fragment_data,
 326                                                 fragment_len, txctl,
 327                                                 (struct ieee80211_cts *)
 328                                                 (txhdr->rts_frame));
 329                         mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
 330                         len = sizeof(struct ieee80211_cts);
 331                 } else {
 332                         ieee80211_rts_get(dev->wl->hw,
 333                                           txctl->vif,
 334                                           fragment_data, fragment_len, txctl,
 335                                           (struct ieee80211_rts *)
 336                                           (txhdr->rts_frame));
 337                         mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
 338                         len = sizeof(struct ieee80211_rts);
 339                 }
 340                 len += FCS_LEN;
 341                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 342                                             (&txhdr->rts_plcp),
 343                                             len, rts_rate);
 344                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 345                                             (&txhdr->rts_plcp_fb),
 346                                             len, rts_rate_fb);
 347                 hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
 348                 txhdr->rts_dur_fb = hdr->duration_id;
 349         }
 350
 351         /* Magic cookie */
 352         txhdr->cookie = cpu_to_le16(cookie);
 353
 354         /* Apply the bitfields */
 355         txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 356         txhdr->phy_ctl = cpu_to_le16(phy_ctl);
 357
 358         return 0;
 359 }
 360
 361 int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
 362                               u8 *txhdr,
 363                               const unsigned char *fragment_data,
 364                               unsigned int fragment_len,
 365                               const struct ieee80211_tx_control *txctl,
 366                               u16 cookie)
 367 {
 368         return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
 369                            fragment_data, fragment_len,
 370                            txctl, cookie);
 371 }
 372
 373 static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
 374                                      u8 in_rssi, int ofdm,
 375                                      int adjust_2053, int adjust_2050)
 376 {
 377         struct b43legacy_phy *phy = &dev->phy;
 378         s32 tmp;
 379
 380         switch (phy->radio_ver) {
 381         case 0x2050:
 382                 if (ofdm) {
 383                         tmp = in_rssi;
 384                         if (tmp > 127)
 385                                 tmp -= 256;
 386                         tmp *= 73;
 387                         tmp /= 64;
 388                         if (adjust_2050)
 389                                 tmp += 25;
 390                         else
 391                                 tmp -= 3;
 392                 } else {
 393                         if (dev->dev->bus->sprom.boardflags_lo
 394                             & B43legacy_BFL_RSSI) {
 395                                 if (in_rssi > 63)
 396                                         in_rssi = 63;
 397                                 tmp = phy->nrssi_lt[in_rssi];
 398                                 tmp = 31 - tmp;
 399                                 tmp *= -131;
 400                                 tmp /= 128;
 401                                 tmp -= 57;
 402                         } else {
 403                                 tmp = in_rssi;
 404                                 tmp = 31 - tmp;
 405                                 tmp *= -149;
 406                                 tmp /= 128;
 407                                 tmp -= 68;
 408                         }
 409                         if (phy->type == B43legacy_PHYTYPE_G &&
 410                             adjust_2050)
 411                                 tmp += 25;
 412                 }
 413                 break;
 414         case 0x2060:
 415                 if (in_rssi > 127)
 416                         tmp = in_rssi - 256;
 417                 else
 418                         tmp = in_rssi;
 419                 break;
 420         default:
 421                 tmp = in_rssi;
 422                 tmp -= 11;
 423                 tmp *= 103;
 424                 tmp /= 64;
 425                 if (adjust_2053)
 426                         tmp -= 109;
 427                 else
 428                         tmp -= 83;
 429         }
 430
 431         return (s8)tmp;
 432 }
 433
 434 void b43legacy_rx(struct b43legacy_wldev *dev,
 435                   struct sk_buff *skb,
 436                   const void *_rxhdr)
 437 {
 438         struct ieee80211_rx_status status;
 439         struct b43legacy_plcp_hdr6 *plcp;
 440         struct ieee80211_hdr *wlhdr;
 441         const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
 442         u16 fctl;
 443         u16 phystat0;
 444         u16 phystat3;
 445         u16 chanstat;
 446         u16 mactime;
 447         u32 macstat;
 448         u16 chanid;
 449         u8 jssi;
 450         int padding;
 451
 452         memset(&status, 0, sizeof(status));
 453
 454         /* Get metadata about the frame from the header. */
 455         phystat0 = le16_to_cpu(rxhdr->phy_status0);
 456         phystat3 = le16_to_cpu(rxhdr->phy_status3);
 457         jssi = rxhdr->jssi;
 458         macstat = le16_to_cpu(rxhdr->mac_status);
 459         mactime = le16_to_cpu(rxhdr->mac_time);
 460         chanstat = le16_to_cpu(rxhdr->channel);
 461
 462         if (macstat & B43legacy_RX_MAC_FCSERR)
 463                 dev->wl->ieee_stats.dot11FCSErrorCount++;
 464
 465         /* Skip PLCP and padding */
 466         padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
 467         if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
 468             padding))) {
 469                 b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
 470                 goto drop;
 471         }
 472         plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
 473         skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
 474         /* The skb contains the Wireless Header + payload data now */
 475         if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
 476                 b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
 477                 goto drop;
 478         }
 479         wlhdr = (struct ieee80211_hdr *)(skb->data);
 480         fctl = le16_to_cpu(wlhdr->frame_control);
 481
 482         if ((macstat & B43legacy_RX_MAC_DEC) &&
 483             !(macstat & B43legacy_RX_MAC_DECERR)) {
 484                 unsigned int keyidx;
 485                 int wlhdr_len;
 486                 int iv_len;
 487                 int icv_len;
 488
 489                 keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
 490                           >> B43legacy_RX_MAC_KEYIDX_SHIFT);
 491                 /* We must adjust the key index here. We want the "physical"
 492                  * key index, but the ucode passed it slightly different.
 493                  */
 494                 keyidx = b43legacy_kidx_to_raw(dev, keyidx);
 495                 B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
 496
 497                 if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
 498                         /* Remove PROTECTED flag to mark it as decrypted. */
 499                         B43legacy_WARN_ON(!(fctl & IEEE80211_FCTL_PROTECTED));
 500                         fctl &= ~IEEE80211_FCTL_PROTECTED;
 501                         wlhdr->frame_control = cpu_to_le16(fctl);
 502
 503                         wlhdr_len = ieee80211_get_hdrlen(fctl);
 504                         if (unlikely(skb->len < (wlhdr_len + 3))) {
 505                                 b43legacydbg(dev->wl, "RX: Packet size"
 506                                              " underrun3\n");
 507                                 goto drop;
 508                         }
 509                         if (skb->data[wlhdr_len + 3] & (1 << 5)) {
 510                                 /* The Ext-IV Bit is set in the "KeyID"
 511                                  * octet of the IV.
 512                                  */
 513                                 iv_len = 8;
 514                                 icv_len = 8;
 515                         } else {
 516                                 iv_len = 4;
 517                                 icv_len = 4;
 518                         }
 519                         if (unlikely(skb->len < (wlhdr_len + iv_len +
 520                             icv_len))) {
 521                                 b43legacydbg(dev->wl, "RX: Packet size"
 522                                              " underrun4\n");
 523                                 goto drop;
 524                         }
 525                         /* Remove the IV */
 526                         memmove(skb->data + iv_len, skb->data, wlhdr_len);
 527                         skb_pull(skb, iv_len);
 528                         /* Remove the ICV */
 529                         skb_trim(skb, skb->len - icv_len);
 530
 531                         status.flag |= RX_FLAG_DECRYPTED;
 532                 }
 533         }
 534
 535         status.ssi = b43legacy_rssi_postprocess(dev, jssi,
 536                                       (phystat0 & B43legacy_RX_PHYST0_OFDM),
 537                                       (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
 538                                       (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
 539         status.noise = dev->stats.link_noise;
 540         status.signal = (jssi * 100) / B43legacy_RX_MAX_SSI;
 541         /* change to support A PHY */
 542         if (phystat0 & B43legacy_RX_PHYST0_OFDM)
 543                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
 544         else
 545                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
 546         status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
 547
 548         /*
 549          * If monitors are present get full 64-bit timestamp. This
 550          * code assumes we get to process the packet within 16 bits
 551          * of timestamp, i.e. about 65 milliseconds after the PHY
 552          * received the first symbol.
 553          */
 554         if (dev->wl->radiotap_enabled) {
 555                 u16 low_mactime_now;
 556
 557                 b43legacy_tsf_read(dev, &status.mactime);
 558                 low_mactime_now = status.mactime;
 559                 status.mactime = status.mactime & ~0xFFFFULL;
 560                 status.mactime += mactime;
 561                 if (low_mactime_now <= mactime)
 562                         status.mactime -= 0x10000;
 563                 status.flag |= RX_FLAG_TSFT;
 564         }
 565
 566         chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
 567                   B43legacy_RX_CHAN_ID_SHIFT;
 568         switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
 569         case B43legacy_PHYTYPE_B:
 570         case B43legacy_PHYTYPE_G:
 571                 status.band = IEEE80211_BAND_2GHZ;
 572                 status.freq = chanid + 2400;
 573                 break;
 574         default:
 575                 b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
 576                        chanstat);
 577         }
 578
 579         dev->stats.last_rx = jiffies;
 580         ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
 581
 582         return;
 583 drop:
 584         b43legacydbg(dev->wl, "RX: Packet dropped\n");
 585         dev_kfree_skb_any(skb);
 586 }
 587
 588 void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
 589                              const struct b43legacy_txstatus *status)
 590 {
 591         b43legacy_debugfs_log_txstat(dev, status);
 592
 593         if (status->intermediate)
 594                 return;
 595         if (status->for_ampdu)
 596                 return;
 597         if (!status->acked)
 598                 dev->wl->ieee_stats.dot11ACKFailureCount++;
 599         if (status->rts_count) {
 600                 if (status->rts_count == 0xF) /* FIXME */
 601                         dev->wl->ieee_stats.dot11RTSFailureCount++;
 602                 else
 603                         dev->wl->ieee_stats.dot11RTSSuccessCount++;
 604         }
 605
 606         if (b43legacy_using_pio(dev))
 607                 b43legacy_pio_handle_txstatus(dev, status);
 608         else
 609                 b43legacy_dma_handle_txstatus(dev, status);
 610 }
 611
 612 /* Handle TX status report as received through DMA/PIO queues */
 613 void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
 614                                  const struct b43legacy_hwtxstatus *hw)
 615 {
 616         struct b43legacy_txstatus status;
 617         u8 tmp;
 618
 619         status.cookie = le16_to_cpu(hw->cookie);
 620         status.seq = le16_to_cpu(hw->seq);
 621         status.phy_stat = hw->phy_stat;
 622         tmp = hw->count;
 623         status.frame_count = (tmp >> 4);
 624         status.rts_count = (tmp & 0x0F);
 625         tmp = hw->flags;
 626         status.supp_reason = ((tmp & 0x1C) >> 2);
 627         status.pm_indicated = !!(tmp & 0x80);
 628         status.intermediate = !!(tmp & 0x40);
 629         status.for_ampdu = !!(tmp & 0x20);
 630         status.acked = !!(tmp & 0x02);
 631
 632         b43legacy_handle_txstatus(dev, &status);
 633 }
 634
 635 /* Stop any TX operation on the device (suspend the hardware queues) */
 636 void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
 637 {
 638         if (b43legacy_using_pio(dev))
 639                 b43legacy_pio_freeze_txqueues(dev);
 640         else
 641                 b43legacy_dma_tx_suspend(dev);
 642 }
 643
 644 /* Resume any TX operation on the device (resume the hardware queues) */
 645 void b43legacy_tx_resume(struct b43legacy_wldev *dev)
 646 {
 647         if (b43legacy_using_pio(dev))
 648                 b43legacy_pio_thaw_txqueues(dev);
 649         else
 650                 b43legacy_dma_tx_resume(dev);
 651 }
 652
 653 /* Initialize the QoS parameters */
 654 void b43legacy_qos_init(struct b43legacy_wldev *dev)
 655 {
 656         /* FIXME: This function must probably be called from the mac80211
 657          * config callback. */
 658 return;
 659
 660         b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
 661         /* FIXME kill magic */
 662         b43legacy_write16(dev, 0x688,
 663                           b43legacy_read16(dev, 0x688) | 0x4);
 664
 665
 666         /*TODO: We might need some stack support here to get the values. */
 667 }