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_cck(struct b43legacy_plcp_hdr6 *plcp)
  41 {
  42         switch (plcp->raw[0]) {
  43         case 0x0A:
  44                 return B43legacy_CCK_RATE_1MB;
  45         case 0x14:
  46                 return B43legacy_CCK_RATE_2MB;
  47         case 0x37:
  48                 return B43legacy_CCK_RATE_5MB;
  49         case 0x6E:
  50                 return B43legacy_CCK_RATE_11MB;
  51         }
  52         B43legacy_BUG_ON(1);
  53         return 0;
  54 }
  55
  56 /* Extract the bitrate out of an OFDM PLCP header. */
  57 static u8 b43legacy_plcp_get_bitrate_ofdm(struct b43legacy_plcp_hdr6 *plcp)
  58 {
  59         switch (plcp->raw[0] & 0xF) {
  60         case 0xB:
  61                 return B43legacy_OFDM_RATE_6MB;
  62         case 0xF:
  63                 return B43legacy_OFDM_RATE_9MB;
  64         case 0xA:
  65                 return B43legacy_OFDM_RATE_12MB;
  66         case 0xE:
  67                 return B43legacy_OFDM_RATE_18MB;
  68         case 0x9:
  69                 return B43legacy_OFDM_RATE_24MB;
  70         case 0xD:
  71                 return B43legacy_OFDM_RATE_36MB;
  72         case 0x8:
  73                 return B43legacy_OFDM_RATE_48MB;
  74         case 0xC:
  75                 return B43legacy_OFDM_RATE_54MB;
  76         }
  77         B43legacy_BUG_ON(1);
  78         return 0;
  79 }
  80
  81 u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
  82 {
  83         switch (bitrate) {
  84         case B43legacy_CCK_RATE_1MB:
  85                 return 0x0A;
  86         case B43legacy_CCK_RATE_2MB:
  87                 return 0x14;
  88         case B43legacy_CCK_RATE_5MB:
  89                 return 0x37;
  90         case B43legacy_CCK_RATE_11MB:
  91                 return 0x6E;
  92         }
  93         B43legacy_BUG_ON(1);
  94         return 0;
  95 }
  96
  97 u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
  98 {
  99         switch (bitrate) {
 100         case B43legacy_OFDM_RATE_6MB:
 101                 return 0xB;
 102         case B43legacy_OFDM_RATE_9MB:
 103                 return 0xF;
 104         case B43legacy_OFDM_RATE_12MB:
 105                 return 0xA;
 106         case B43legacy_OFDM_RATE_18MB:
 107                 return 0xE;
 108         case B43legacy_OFDM_RATE_24MB:
 109                 return 0x9;
 110         case B43legacy_OFDM_RATE_36MB:
 111                 return 0xD;
 112         case B43legacy_OFDM_RATE_48MB:
 113                 return 0x8;
 114         case B43legacy_OFDM_RATE_54MB:
 115                 return 0xC;
 116         }
 117         B43legacy_BUG_ON(1);
 118         return 0;
 119 }
 120
 121 void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
 122                                  const u16 octets, const u8 bitrate)
 123 {
 124         __le32 *data = &(plcp->data);
 125         __u8 *raw = plcp->raw;
 126
 127         if (b43legacy_is_ofdm_rate(bitrate)) {
 128                 u16 d;
 129
 130                 d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
 131                 B43legacy_WARN_ON(octets & 0xF000);
 132                 d |= (octets << 5);
 133                 *data = cpu_to_le32(d);
 134         } else {
 135                 u32 plen;
 136
 137                 plen = octets * 16 / bitrate;
 138                 if ((octets * 16 % bitrate) > 0) {
 139                         plen++;
 140                         if ((bitrate == B43legacy_CCK_RATE_11MB)
 141                             && ((octets * 8 % 11) < 4))
 142                                 raw[1] = 0x84;
 143                         else
 144                                 raw[1] = 0x04;
 145                 } else
 146                         raw[1] = 0x04;
 147                 *data |= cpu_to_le32(plen << 16);
 148                 raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
 149         }
 150 }
 151
 152 static u8 b43legacy_calc_fallback_rate(u8 bitrate)
 153 {
 154         switch (bitrate) {
 155         case B43legacy_CCK_RATE_1MB:
 156                 return B43legacy_CCK_RATE_1MB;
 157         case B43legacy_CCK_RATE_2MB:
 158                 return B43legacy_CCK_RATE_1MB;
 159         case B43legacy_CCK_RATE_5MB:
 160                 return B43legacy_CCK_RATE_2MB;
 161         case B43legacy_CCK_RATE_11MB:
 162                 return B43legacy_CCK_RATE_5MB;
 163         case B43legacy_OFDM_RATE_6MB:
 164                 return B43legacy_CCK_RATE_5MB;
 165         case B43legacy_OFDM_RATE_9MB:
 166                 return B43legacy_OFDM_RATE_6MB;
 167         case B43legacy_OFDM_RATE_12MB:
 168                 return B43legacy_OFDM_RATE_9MB;
 169         case B43legacy_OFDM_RATE_18MB:
 170                 return B43legacy_OFDM_RATE_12MB;
 171         case B43legacy_OFDM_RATE_24MB:
 172                 return B43legacy_OFDM_RATE_18MB;
 173         case B43legacy_OFDM_RATE_36MB:
 174                 return B43legacy_OFDM_RATE_24MB;
 175         case B43legacy_OFDM_RATE_48MB:
 176                 return B43legacy_OFDM_RATE_36MB;
 177         case B43legacy_OFDM_RATE_54MB:
 178                 return B43legacy_OFDM_RATE_48MB;
 179         }
 180         B43legacy_BUG_ON(1);
 181         return 0;
 182 }
 183
 184 static void generate_txhdr_fw3(struct b43legacy_wldev *dev,
 185                                struct b43legacy_txhdr_fw3 *txhdr,
 186                                const unsigned char *fragment_data,
 187                                unsigned int fragment_len,
 188                                const struct ieee80211_tx_control *txctl,
 189                                u16 cookie)
 190 {
 191         const struct ieee80211_hdr *wlhdr;
 192         int use_encryption = (!(txctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT));
 193         u16 fctl;
 194         u8 rate;
 195         u8 rate_fb;
 196         int rate_ofdm;
 197         int rate_fb_ofdm;
 198         unsigned int plcp_fragment_len;
 199         u32 mac_ctl = 0;
 200         u16 phy_ctl = 0;
 201
 202         wlhdr = (const struct ieee80211_hdr *)fragment_data;
 203         fctl = le16_to_cpu(wlhdr->frame_control);
 204
 205         memset(txhdr, 0, sizeof(*txhdr));
 206
 207         rate = txctl->tx_rate;
 208         rate_ofdm = b43legacy_is_ofdm_rate(rate);
 209         rate_fb = (txctl->alt_retry_rate == -1) ? rate : txctl->alt_retry_rate;
 210         rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb);
 211
 212         txhdr->mac_frame_ctl = wlhdr->frame_control;
 213         memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
 214
 215         /* Calculate duration for fallback rate */
 216         if ((rate_fb == rate) ||
 217             (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
 218             (wlhdr->duration_id == cpu_to_le16(0))) {
 219                 /* If the fallback rate equals the normal rate or the
 220                  * dur_id field contains an AID, CFP magic or 0,
 221                  * use the original dur_id field. */
 222                 txhdr->dur_fb = wlhdr->duration_id;
 223         } else {
 224                 int fbrate_base100kbps = B43legacy_RATE_TO_100KBPS(rate_fb);
 225                 txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
 226                                                          txctl->vif,
 227                                                          fragment_len,
 228                                                          fbrate_base100kbps);
 229         }
 230
 231         plcp_fragment_len = fragment_len + FCS_LEN;
 232         if (use_encryption) {
 233                 u8 key_idx = (u16)(txctl->key_idx);
 234                 struct b43legacy_key *key;
 235                 int wlhdr_len;
 236                 size_t iv_len;
 237
 238                 B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
 239                 key = &(dev->key[key_idx]);
 240
 241                 if (key->enabled) {
 242                         /* Hardware appends ICV. */
 243                         plcp_fragment_len += txctl->icv_len;
 244
 245                         key_idx = b43legacy_kidx_to_fw(dev, key_idx);
 246                         mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
 247                                    B43legacy_TX4_MAC_KEYIDX;
 248                         mac_ctl |= (key->algorithm <<
 249                                    B43legacy_TX4_MAC_KEYALG_SHIFT) &
 250                                    B43legacy_TX4_MAC_KEYALG;
 251                         wlhdr_len = ieee80211_get_hdrlen(fctl);
 252                         iv_len = min((size_t)txctl->iv_len,
 253                                      ARRAY_SIZE(txhdr->iv));
 254                         memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
 255                 }
 256         }
 257         b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 258                                     (&txhdr->plcp), plcp_fragment_len,
 259                                     rate);
 260         b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 261                                     (&txhdr->plcp_fb), plcp_fragment_len,
 262                                     rate_fb);
 263
 264         /* PHY TX Control word */
 265         if (rate_ofdm)
 266                 phy_ctl |= B43legacy_TX4_PHY_OFDM;
 267         if (dev->short_preamble)
 268                 phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
 269         switch (txctl->antenna_sel_tx) {
 270         case 0:
 271                 phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
 272                 break;
 273         case 1:
 274                 phy_ctl |= B43legacy_TX4_PHY_ANT0;
 275                 break;
 276         case 2:
 277                 phy_ctl |= B43legacy_TX4_PHY_ANT1;
 278                 break;
 279         default:
 280                 B43legacy_BUG_ON(1);
 281         }
 282
 283         /* MAC control */
 284         if (!(txctl->flags & IEEE80211_TXCTL_NO_ACK))
 285                 mac_ctl |= B43legacy_TX4_MAC_ACK;
 286         if (!(((fctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
 287               ((fctl & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)))
 288                 mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
 289         if (txctl->flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
 290                 mac_ctl |= B43legacy_TX4_MAC_STMSDU;
 291         if (rate_fb_ofdm)
 292                 mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
 293         if (txctl->flags & IEEE80211_TXCTL_LONG_RETRY_LIMIT)
 294                 mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
 295
 296         /* Generate the RTS or CTS-to-self frame */
 297         if ((txctl->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
 298             (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
 299                 unsigned int len;
 300                 struct ieee80211_hdr *hdr;
 301                 int rts_rate;
 302                 int rts_rate_fb;
 303                 int rts_rate_ofdm;
 304                 int rts_rate_fb_ofdm;
 305
 306                 rts_rate = txctl->rts_cts_rate;
 307                 rts_rate_ofdm = b43legacy_is_ofdm_rate(rts_rate);
 308                 rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
 309                 rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
 310                 if (rts_rate_fb_ofdm)
 311                         mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
 312
 313                 if (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
 314                         ieee80211_ctstoself_get(dev->wl->hw,
 315                                                 txctl->vif,
 316                                                 fragment_data,
 317                                                 fragment_len, txctl,
 318                                                 (struct ieee80211_cts *)
 319                                                 (txhdr->rts_frame));
 320                         mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
 321                         len = sizeof(struct ieee80211_cts);
 322                 } else {
 323                         ieee80211_rts_get(dev->wl->hw,
 324                                           txctl->vif,
 325                                           fragment_data, fragment_len, txctl,
 326                                           (struct ieee80211_rts *)
 327                                           (txhdr->rts_frame));
 328                         mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
 329                         len = sizeof(struct ieee80211_rts);
 330                 }
 331                 len += FCS_LEN;
 332                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 333                                             (&txhdr->rts_plcp),
 334                                             len, rts_rate);
 335                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 336                                             (&txhdr->rts_plcp_fb),
 337                                             len, rts_rate_fb);
 338                 hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
 339                 txhdr->rts_dur_fb = hdr->duration_id;
 340         }
 341
 342         /* Magic cookie */
 343         txhdr->cookie = cpu_to_le16(cookie);
 344
 345         /* Apply the bitfields */
 346         txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 347         txhdr->phy_ctl = cpu_to_le16(phy_ctl);
 348 }
 349
 350 void b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
 351                               u8 *txhdr,
 352                               const unsigned char *fragment_data,
 353                               unsigned int fragment_len,
 354                               const struct ieee80211_tx_control *txctl,
 355                               u16 cookie)
 356 {
 357         generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
 358                            fragment_data, fragment_len,
 359                            txctl, cookie);
 360 }
 361
 362 static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
 363                                      u8 in_rssi, int ofdm,
 364                                      int adjust_2053, int adjust_2050)
 365 {
 366         struct b43legacy_phy *phy = &dev->phy;
 367         s32 tmp;
 368
 369         switch (phy->radio_ver) {
 370         case 0x2050:
 371                 if (ofdm) {
 372                         tmp = in_rssi;
 373                         if (tmp > 127)
 374                                 tmp -= 256;
 375                         tmp *= 73;
 376                         tmp /= 64;
 377                         if (adjust_2050)
 378                                 tmp += 25;
 379                         else
 380                                 tmp -= 3;
 381                 } else {
 382                         if (dev->dev->bus->sprom.boardflags_lo
 383                             & B43legacy_BFL_RSSI) {
 384                                 if (in_rssi > 63)
 385                                         in_rssi = 63;
 386                                 tmp = phy->nrssi_lt[in_rssi];
 387                                 tmp = 31 - tmp;
 388                                 tmp *= -131;
 389                                 tmp /= 128;
 390                                 tmp -= 57;
 391                         } else {
 392                                 tmp = in_rssi;
 393                                 tmp = 31 - tmp;
 394                                 tmp *= -149;
 395                                 tmp /= 128;
 396                                 tmp -= 68;
 397                         }
 398                         if (phy->type == B43legacy_PHYTYPE_G &&
 399                             adjust_2050)
 400                                 tmp += 25;
 401                 }
 402                 break;
 403         case 0x2060:
 404                 if (in_rssi > 127)
 405                         tmp = in_rssi - 256;
 406                 else
 407                         tmp = in_rssi;
 408                 break;
 409         default:
 410                 tmp = in_rssi;
 411                 tmp -= 11;
 412                 tmp *= 103;
 413                 tmp /= 64;
 414                 if (adjust_2053)
 415                         tmp -= 109;
 416                 else
 417                         tmp -= 83;
 418         }
 419
 420         return (s8)tmp;
 421 }
 422
 423 void b43legacy_rx(struct b43legacy_wldev *dev,
 424                   struct sk_buff *skb,
 425                   const void *_rxhdr)
 426 {
 427         struct ieee80211_rx_status status;
 428         struct b43legacy_plcp_hdr6 *plcp;
 429         struct ieee80211_hdr *wlhdr;
 430         const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
 431         u16 fctl;
 432         u16 phystat0;
 433         u16 phystat3;
 434         u16 chanstat;
 435         u16 mactime;
 436         u32 macstat;
 437         u16 chanid;
 438         u8 jssi;
 439         int padding;
 440
 441         memset(&status, 0, sizeof(status));
 442
 443         /* Get metadata about the frame from the header. */
 444         phystat0 = le16_to_cpu(rxhdr->phy_status0);
 445         phystat3 = le16_to_cpu(rxhdr->phy_status3);
 446         jssi = rxhdr->jssi;
 447         macstat = le16_to_cpu(rxhdr->mac_status);
 448         mactime = le16_to_cpu(rxhdr->mac_time);
 449         chanstat = le16_to_cpu(rxhdr->channel);
 450
 451         if (macstat & B43legacy_RX_MAC_FCSERR)
 452                 dev->wl->ieee_stats.dot11FCSErrorCount++;
 453
 454         /* Skip PLCP and padding */
 455         padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
 456         if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
 457             padding))) {
 458                 b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
 459                 goto drop;
 460         }
 461         plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
 462         skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
 463         /* The skb contains the Wireless Header + payload data now */
 464         if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
 465                 b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
 466                 goto drop;
 467         }
 468         wlhdr = (struct ieee80211_hdr *)(skb->data);
 469         fctl = le16_to_cpu(wlhdr->frame_control);
 470
 471         if ((macstat & B43legacy_RX_MAC_DEC) &&
 472             !(macstat & B43legacy_RX_MAC_DECERR)) {
 473                 unsigned int keyidx;
 474                 int wlhdr_len;
 475                 int iv_len;
 476                 int icv_len;
 477
 478                 keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
 479                           >> B43legacy_RX_MAC_KEYIDX_SHIFT);
 480                 /* We must adjust the key index here. We want the "physical"
 481                  * key index, but the ucode passed it slightly different.
 482                  */
 483                 keyidx = b43legacy_kidx_to_raw(dev, keyidx);
 484                 B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
 485
 486                 if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
 487                         /* Remove PROTECTED flag to mark it as decrypted. */
 488                         B43legacy_WARN_ON(!(fctl & IEEE80211_FCTL_PROTECTED));
 489                         fctl &= ~IEEE80211_FCTL_PROTECTED;
 490                         wlhdr->frame_control = cpu_to_le16(fctl);
 491
 492                         wlhdr_len = ieee80211_get_hdrlen(fctl);
 493                         if (unlikely(skb->len < (wlhdr_len + 3))) {
 494                                 b43legacydbg(dev->wl, "RX: Packet size"
 495                                              " underrun3\n");
 496                                 goto drop;
 497                         }
 498                         if (skb->data[wlhdr_len + 3] & (1 << 5)) {
 499                                 /* The Ext-IV Bit is set in the "KeyID"
 500                                  * octet of the IV.
 501                                  */
 502                                 iv_len = 8;
 503                                 icv_len = 8;
 504                         } else {
 505                                 iv_len = 4;
 506                                 icv_len = 4;
 507                         }
 508                         if (unlikely(skb->len < (wlhdr_len + iv_len +
 509                             icv_len))) {
 510                                 b43legacydbg(dev->wl, "RX: Packet size"
 511                                              " underrun4\n");
 512                                 goto drop;
 513                         }
 514                         /* Remove the IV */
 515                         memmove(skb->data + iv_len, skb->data, wlhdr_len);
 516                         skb_pull(skb, iv_len);
 517                         /* Remove the ICV */
 518                         skb_trim(skb, skb->len - icv_len);
 519
 520                         status.flag |= RX_FLAG_DECRYPTED;
 521                 }
 522         }
 523
 524         status.ssi = b43legacy_rssi_postprocess(dev, jssi,
 525                                       (phystat0 & B43legacy_RX_PHYST0_OFDM),
 526                                       (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
 527                                       (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
 528         status.noise = dev->stats.link_noise;
 529         status.signal = (jssi * 100) / B43legacy_RX_MAX_SSI;
 530         if (phystat0 & B43legacy_RX_PHYST0_OFDM)
 531                 status.rate = b43legacy_plcp_get_bitrate_ofdm(plcp);
 532         else
 533                 status.rate = b43legacy_plcp_get_bitrate_cck(plcp);
 534         status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
 535
 536         /*
 537          * If monitors are present get full 64-bit timestamp. This
 538          * code assumes we get to process the packet within 16 bits
 539          * of timestamp, i.e. about 65 milliseconds after the PHY
 540          * received the first symbol.
 541          */
 542         if (dev->wl->radiotap_enabled) {
 543                 u16 low_mactime_now;
 544
 545                 b43legacy_tsf_read(dev, &status.mactime);
 546                 low_mactime_now = status.mactime;
 547                 status.mactime = status.mactime & ~0xFFFFULL;
 548                 status.mactime += mactime;
 549                 if (low_mactime_now <= mactime)
 550                         status.mactime -= 0x10000;
 551                 status.flag |= RX_FLAG_TSFT;
 552         }
 553
 554         chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
 555                   B43legacy_RX_CHAN_ID_SHIFT;
 556         switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
 557         case B43legacy_PHYTYPE_B:
 558                 status.phymode = MODE_IEEE80211B;
 559                 status.freq = chanid + 2400;
 560                 status.channel = b43legacy_freq_to_channel_bg(chanid + 2400);
 561                 break;
 562         case B43legacy_PHYTYPE_G:
 563                 status.phymode = MODE_IEEE80211G;
 564                 status.freq = chanid + 2400;
 565                 status.channel = b43legacy_freq_to_channel_bg(chanid + 2400);
 566                 break;
 567         default:
 568                 b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
 569                        chanstat);
 570         }
 571
 572         dev->stats.last_rx = jiffies;
 573         ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
 574
 575         return;
 576 drop:
 577         b43legacydbg(dev->wl, "RX: Packet dropped\n");
 578         dev_kfree_skb_any(skb);
 579 }
 580
 581 void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
 582                              const struct b43legacy_txstatus *status)
 583 {
 584         b43legacy_debugfs_log_txstat(dev, status);
 585
 586         if (status->intermediate)
 587                 return;
 588         if (status->for_ampdu)
 589                 return;
 590         if (!status->acked)
 591                 dev->wl->ieee_stats.dot11ACKFailureCount++;
 592         if (status->rts_count) {
 593                 if (status->rts_count == 0xF) /* FIXME */
 594                         dev->wl->ieee_stats.dot11RTSFailureCount++;
 595                 else
 596                         dev->wl->ieee_stats.dot11RTSSuccessCount++;
 597         }
 598
 599         if (b43legacy_using_pio(dev))
 600                 b43legacy_pio_handle_txstatus(dev, status);
 601         else
 602                 b43legacy_dma_handle_txstatus(dev, status);
 603 }
 604
 605 /* Handle TX status report as received through DMA/PIO queues */
 606 void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
 607                                  const struct b43legacy_hwtxstatus *hw)
 608 {
 609         struct b43legacy_txstatus status;
 610         u8 tmp;
 611
 612         status.cookie = le16_to_cpu(hw->cookie);
 613         status.seq = le16_to_cpu(hw->seq);
 614         status.phy_stat = hw->phy_stat;
 615         tmp = hw->count;
 616         status.frame_count = (tmp >> 4);
 617         status.rts_count = (tmp & 0x0F);
 618         tmp = hw->flags;
 619         status.supp_reason = ((tmp & 0x1C) >> 2);
 620         status.pm_indicated = !!(tmp & 0x80);
 621         status.intermediate = !!(tmp & 0x40);
 622         status.for_ampdu = !!(tmp & 0x20);
 623         status.acked = !!(tmp & 0x02);
 624
 625         b43legacy_handle_txstatus(dev, &status);
 626 }
 627
 628 /* Stop any TX operation on the device (suspend the hardware queues) */
 629 void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
 630 {
 631         if (b43legacy_using_pio(dev))
 632                 b43legacy_pio_freeze_txqueues(dev);
 633         else
 634                 b43legacy_dma_tx_suspend(dev);
 635 }
 636
 637 /* Resume any TX operation on the device (resume the hardware queues) */
 638 void b43legacy_tx_resume(struct b43legacy_wldev *dev)
 639 {
 640         if (b43legacy_using_pio(dev))
 641                 b43legacy_pio_thaw_txqueues(dev);
 642         else
 643                 b43legacy_dma_tx_resume(dev);
 644 }
 645
 646 /* Initialize the QoS parameters */
 647 void b43legacy_qos_init(struct b43legacy_wldev *dev)
 648 {
 649         /* FIXME: This function must probably be called from the mac80211
 650          * config callback. */
 651 return;
 652
 653         b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
 654         /* FIXME kill magic */
 655         b43legacy_write16(dev, 0x688,
 656                           b43legacy_read16(dev, 0x688) | 0x4);
 657
 658
 659         /*TODO: We might need some stack support here to get the values. */
 660 }