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 <m@bues.ch>
  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                                struct ieee80211_tx_info *info,
 192                                u16 cookie)
 193 {
 194         const struct ieee80211_hdr *wlhdr;
 195         int use_encryption = !!info->control.hw_key;
 196         u8 rate;
 197         struct ieee80211_rate *rate_fb;
 198         int rate_ofdm;
 199         int rate_fb_ofdm;
 200         unsigned int plcp_fragment_len;
 201         u32 mac_ctl = 0;
 202         u16 phy_ctl = 0;
 203         struct ieee80211_rate *tx_rate;
 204         struct ieee80211_tx_rate *rates;
 205
 206         wlhdr = (const struct ieee80211_hdr *)fragment_data;
 207
 208         memset(txhdr, 0, sizeof(*txhdr));
 209
 210         tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);
 211
 212         rate = tx_rate->hw_value;
 213         rate_ofdm = b43legacy_is_ofdm_rate(rate);
 214         rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
 215         rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
 216
 217         txhdr->mac_frame_ctl = wlhdr->frame_control;
 218         memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
 219
 220         /* Calculate duration for fallback rate */
 221         if ((rate_fb->hw_value == rate) ||
 222             (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
 223             (wlhdr->duration_id == cpu_to_le16(0))) {
 224                 /* If the fallback rate equals the normal rate or the
 225                  * dur_id field contains an AID, CFP magic or 0,
 226                  * use the original dur_id field. */
 227                 txhdr->dur_fb = wlhdr->duration_id;
 228         } else {
 229                 txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
 230                                                          info->control.vif,
 231                                                          info->band,
 232                                                          fragment_len,
 233                                                          rate_fb);
 234         }
 235
 236         plcp_fragment_len = fragment_len + FCS_LEN;
 237         if (use_encryption) {
 238                 u8 key_idx = info->control.hw_key->hw_key_idx;
 239                 struct b43legacy_key *key;
 240                 int wlhdr_len;
 241                 size_t iv_len;
 242
 243                 B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
 244                 key = &(dev->key[key_idx]);
 245
 246                 if (key->enabled) {
 247                         /* Hardware appends ICV. */
 248                         plcp_fragment_len += info->control.hw_key->icv_len;
 249
 250                         key_idx = b43legacy_kidx_to_fw(dev, key_idx);
 251                         mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
 252                                    B43legacy_TX4_MAC_KEYIDX;
 253                         mac_ctl |= (key->algorithm <<
 254                                    B43legacy_TX4_MAC_KEYALG_SHIFT) &
 255                                    B43legacy_TX4_MAC_KEYALG;
 256                         wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
 257                         iv_len = min((size_t)info->control.hw_key->iv_len,
 258                                      ARRAY_SIZE(txhdr->iv));
 259                         memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
 260                 } else {
 261                         /* This key is invalid. This might only happen
 262                          * in a short timeframe after machine resume before
 263                          * we were able to reconfigure keys.
 264                          * Drop this packet completely. Do not transmit it
 265                          * unencrypted to avoid leaking information. */
 266                         return -ENOKEY;
 267                 }
 268         }
 269         b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 270                                     (&txhdr->plcp), plcp_fragment_len,
 271                                     rate);
 272         b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 273                                     (&txhdr->plcp_fb), plcp_fragment_len,
 274                                     rate_fb->hw_value);
 275
 276         /* PHY TX Control word */
 277         if (rate_ofdm)
 278                 phy_ctl |= B43legacy_TX4_PHY_ENC_OFDM;
 279         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 280                 phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
 281         phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
 282
 283         /* MAC control */
 284         rates = info->control.rates;
 285         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 286                 mac_ctl |= B43legacy_TX4_MAC_ACK;
 287         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 288                 mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
 289         if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 290                 mac_ctl |= B43legacy_TX4_MAC_STMSDU;
 291         if (rate_fb_ofdm)
 292                 mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
 293
 294         /* Overwrite rates[0].count to make the retry calculation
 295          * in the tx status easier. need the actual retry limit to
 296          * detect whether the fallback rate was used.
 297          */
 298         if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 299             (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
 300                 rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
 301                 mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
 302         } else {
 303                 rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
 304         }
 305
 306         /* Generate the RTS or CTS-to-self frame */
 307         if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 308             (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
 309                 unsigned int len;
 310                 struct ieee80211_hdr *hdr;
 311                 int rts_rate;
 312                 int rts_rate_fb;
 313                 int rts_rate_fb_ofdm;
 314
 315                 rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
 316                 rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
 317                 rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
 318                 if (rts_rate_fb_ofdm)
 319                         mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
 320
 321                 if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 322                         ieee80211_ctstoself_get(dev->wl->hw,
 323                                                 info->control.vif,
 324                                                 fragment_data,
 325                                                 fragment_len, info,
 326                                                 (struct ieee80211_cts *)
 327                                                 (txhdr->rts_frame));
 328                         mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
 329                         len = sizeof(struct ieee80211_cts);
 330                 } else {
 331                         ieee80211_rts_get(dev->wl->hw,
 332                                           info->control.vif,
 333                                           fragment_data, fragment_len, info,
 334                                           (struct ieee80211_rts *)
 335                                           (txhdr->rts_frame));
 336                         mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
 337                         len = sizeof(struct ieee80211_rts);
 338                 }
 339                 len += FCS_LEN;
 340                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 341                                             (&txhdr->rts_plcp),
 342                                             len, rts_rate);
 343                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 344                                             (&txhdr->rts_plcp_fb),
 345                                             len, rts_rate_fb);
 346                 hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
 347                 txhdr->rts_dur_fb = hdr->duration_id;
 348         }
 349
 350         /* Magic cookie */
 351         txhdr->cookie = cpu_to_le16(cookie);
 352
 353         /* Apply the bitfields */
 354         txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 355         txhdr->phy_ctl = cpu_to_le16(phy_ctl);
 356
 357         return 0;
 358 }
 359
 360 int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
 361                               u8 *txhdr,
 362                               const unsigned char *fragment_data,
 363                               unsigned int fragment_len,
 364                               struct ieee80211_tx_info *info,
 365                               u16 cookie)
 366 {
 367         return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
 368                            fragment_data, fragment_len,
 369                            info, cookie);
 370 }
 371
 372 static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
 373                                      u8 in_rssi, int ofdm,
 374                                      int adjust_2053, int adjust_2050)
 375 {
 376         struct b43legacy_phy *phy = &dev->phy;
 377         s32 tmp;
 378
 379         switch (phy->radio_ver) {
 380         case 0x2050:
 381                 if (ofdm) {
 382                         tmp = in_rssi;
 383                         if (tmp > 127)
 384                                 tmp -= 256;
 385                         tmp *= 73;
 386                         tmp /= 64;
 387                         if (adjust_2050)
 388                                 tmp += 25;
 389                         else
 390                                 tmp -= 3;
 391                 } else {
 392                         if (dev->dev->bus->sprom.boardflags_lo
 393                             & B43legacy_BFL_RSSI) {
 394                                 if (in_rssi > 63)
 395                                         in_rssi = 63;
 396                                 tmp = phy->nrssi_lt[in_rssi];
 397                                 tmp = 31 - tmp;
 398                                 tmp *= -131;
 399                                 tmp /= 128;
 400                                 tmp -= 57;
 401                         } else {
 402                                 tmp = in_rssi;
 403                                 tmp = 31 - tmp;
 404                                 tmp *= -149;
 405                                 tmp /= 128;
 406                                 tmp -= 68;
 407                         }
 408                         if (phy->type == B43legacy_PHYTYPE_G &&
 409                             adjust_2050)
 410                                 tmp += 25;
 411                 }
 412                 break;
 413         case 0x2060:
 414                 if (in_rssi > 127)
 415                         tmp = in_rssi - 256;
 416                 else
 417                         tmp = in_rssi;
 418                 break;
 419         default:
 420                 tmp = in_rssi;
 421                 tmp -= 11;
 422                 tmp *= 103;
 423                 tmp /= 64;
 424                 if (adjust_2053)
 425                         tmp -= 109;
 426                 else
 427                         tmp -= 83;
 428         }
 429
 430         return (s8)tmp;
 431 }
 432
 433 void b43legacy_rx(struct b43legacy_wldev *dev,
 434                   struct sk_buff *skb,
 435                   const void *_rxhdr)
 436 {
 437         struct ieee80211_rx_status status;
 438         struct b43legacy_plcp_hdr6 *plcp;
 439         struct ieee80211_hdr *wlhdr;
 440         const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
 441         __le16 fctl;
 442         u16 phystat0;
 443         u16 phystat3;
 444         u16 chanstat;
 445         u16 mactime;
 446         u32 macstat;
 447         u16 chanid;
 448         u8 jssi;
 449         int padding;
 450
 451         memset(&status, 0, sizeof(status));
 452
 453         /* Get metadata about the frame from the header. */
 454         phystat0 = le16_to_cpu(rxhdr->phy_status0);
 455         phystat3 = le16_to_cpu(rxhdr->phy_status3);
 456         jssi = rxhdr->jssi;
 457         macstat = le16_to_cpu(rxhdr->mac_status);
 458         mactime = le16_to_cpu(rxhdr->mac_time);
 459         chanstat = le16_to_cpu(rxhdr->channel);
 460
 461         if (macstat & B43legacy_RX_MAC_FCSERR)
 462                 dev->wl->ieee_stats.dot11FCSErrorCount++;
 463
 464         /* Skip PLCP and padding */
 465         padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
 466         if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
 467             padding))) {
 468                 b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
 469                 goto drop;
 470         }
 471         plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
 472         skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
 473         /* The skb contains the Wireless Header + payload data now */
 474         if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
 475                 b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
 476                 goto drop;
 477         }
 478         wlhdr = (struct ieee80211_hdr *)(skb->data);
 479         fctl = wlhdr->frame_control;
 480
 481         if ((macstat & B43legacy_RX_MAC_DEC) &&
 482             !(macstat & B43legacy_RX_MAC_DECERR)) {
 483                 unsigned int keyidx;
 484                 int wlhdr_len;
 485                 int iv_len;
 486                 int icv_len;
 487
 488                 keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
 489                           >> B43legacy_RX_MAC_KEYIDX_SHIFT);
 490                 /* We must adjust the key index here. We want the "physical"
 491                  * key index, but the ucode passed it slightly different.
 492                  */
 493                 keyidx = b43legacy_kidx_to_raw(dev, keyidx);
 494                 B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
 495
 496                 if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
 497                         /* Remove PROTECTED flag to mark it as decrypted. */
 498                         B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
 499                         fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 500                         wlhdr->frame_control = fctl;
 501
 502                         wlhdr_len = ieee80211_hdrlen(fctl);
 503                         if (unlikely(skb->len < (wlhdr_len + 3))) {
 504                                 b43legacydbg(dev->wl, "RX: Packet size"
 505                                              " underrun3\n");
 506                                 goto drop;
 507                         }
 508                         if (skb->data[wlhdr_len + 3] & (1 << 5)) {
 509                                 /* The Ext-IV Bit is set in the "KeyID"
 510                                  * octet of the IV.
 511                                  */
 512                                 iv_len = 8;
 513                                 icv_len = 8;
 514                         } else {
 515                                 iv_len = 4;
 516                                 icv_len = 4;
 517                         }
 518                         if (unlikely(skb->len < (wlhdr_len + iv_len +
 519                             icv_len))) {
 520                                 b43legacydbg(dev->wl, "RX: Packet size"
 521                                              " underrun4\n");
 522                                 goto drop;
 523                         }
 524                         /* Remove the IV */
 525                         memmove(skb->data + iv_len, skb->data, wlhdr_len);
 526                         skb_pull(skb, iv_len);
 527                         /* Remove the ICV */
 528                         skb_trim(skb, skb->len - icv_len);
 529
 530                         status.flag |= RX_FLAG_DECRYPTED;
 531                 }
 532         }
 533
 534         status.signal = b43legacy_rssi_postprocess(dev, jssi,
 535                                       (phystat0 & B43legacy_RX_PHYST0_OFDM),
 536                                       (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
 537                                       (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
 538         /* change to support A PHY */
 539         if (phystat0 & B43legacy_RX_PHYST0_OFDM)
 540                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
 541         else
 542                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
 543         status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
 544
 545         /*
 546          * All frames on monitor interfaces and beacons always need a full
 547          * 64-bit timestamp. Monitor interfaces need it for diagnostic
 548          * purposes and beacons for IBSS merging.
 549          * This code assumes we get to process the packet within 16 bits
 550          * of timestamp, i.e. about 65 milliseconds after the PHY received
 551          * the first symbol.
 552          */
 553         if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
 554                 u16 low_mactime_now;
 555
 556                 b43legacy_tsf_read(dev, &status.mactime);
 557                 low_mactime_now = status.mactime;
 558                 status.mactime = status.mactime & ~0xFFFFULL;
 559                 status.mactime += mactime;
 560                 if (low_mactime_now <= mactime)
 561                         status.mactime -= 0x10000;
 562                 status.flag |= RX_FLAG_MACTIME_MPDU;
 563         }
 564
 565         chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
 566                   B43legacy_RX_CHAN_ID_SHIFT;
 567         switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
 568         case B43legacy_PHYTYPE_B:
 569         case B43legacy_PHYTYPE_G:
 570                 status.band = IEEE80211_BAND_2GHZ;
 571                 status.freq = chanid + 2400;
 572                 break;
 573         default:
 574                 b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
 575                        chanstat);
 576         }
 577
 578         memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
 579         ieee80211_rx_irqsafe(dev->wl->hw, skb);
 580
 581         return;
 582 drop:
 583         b43legacydbg(dev->wl, "RX: Packet dropped\n");
 584         dev_kfree_skb_any(skb);
 585 }
 586
 587 void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
 588                              const struct b43legacy_txstatus *status)
 589 {
 590         b43legacy_debugfs_log_txstat(dev, status);
 591
 592         if (status->intermediate)
 593                 return;
 594         if (status->for_ampdu)
 595                 return;
 596         if (!status->acked)
 597                 dev->wl->ieee_stats.dot11ACKFailureCount++;
 598         if (status->rts_count) {
 599                 if (status->rts_count == 0xF) /* FIXME */
 600                         dev->wl->ieee_stats.dot11RTSFailureCount++;
 601                 else
 602                         dev->wl->ieee_stats.dot11RTSSuccessCount++;
 603         }
 604
 605         if (b43legacy_using_pio(dev))
 606                 b43legacy_pio_handle_txstatus(dev, status);
 607         else
 608                 b43legacy_dma_handle_txstatus(dev, status);
 609 }
 610
 611 /* Handle TX status report as received through DMA/PIO queues */
 612 void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
 613                                  const struct b43legacy_hwtxstatus *hw)
 614 {
 615         struct b43legacy_txstatus status;
 616         u8 tmp;
 617
 618         status.cookie = le16_to_cpu(hw->cookie);
 619         status.seq = le16_to_cpu(hw->seq);
 620         status.phy_stat = hw->phy_stat;
 621         tmp = hw->count;
 622         status.frame_count = (tmp >> 4);
 623         status.rts_count = (tmp & 0x0F);
 624         tmp = hw->flags << 1;
 625         status.supp_reason = ((tmp & 0x1C) >> 2);
 626         status.pm_indicated = !!(tmp & 0x80);
 627         status.intermediate = !!(tmp & 0x40);
 628         status.for_ampdu = !!(tmp & 0x20);
 629         status.acked = !!(tmp & 0x02);
 630
 631         b43legacy_handle_txstatus(dev, &status);
 632 }
 633
 634 /* Stop any TX operation on the device (suspend the hardware queues) */
 635 void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
 636 {
 637         if (b43legacy_using_pio(dev))
 638                 b43legacy_pio_freeze_txqueues(dev);
 639         else
 640                 b43legacy_dma_tx_suspend(dev);
 641 }
 642
 643 /* Resume any TX operation on the device (resume the hardware queues) */
 644 void b43legacy_tx_resume(struct b43legacy_wldev *dev)
 645 {
 646         if (b43legacy_using_pio(dev))
 647                 b43legacy_pio_thaw_txqueues(dev);
 648         else
 649                 b43legacy_dma_tx_resume(dev);
 650 }
 651
 652 /* Initialize the QoS parameters */
 653 void b43legacy_qos_init(struct b43legacy_wldev *dev)
 654 {
 655         /* FIXME: This function must probably be called from the mac80211
 656          * config callback. */
 657 return;
 658
 659         b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
 660         /* FIXME kill magic */
 661         b43legacy_write16(dev, 0x688,
 662                           b43legacy_read16(dev, 0x688) | 0x4);
 663
 664
 665         /*TODO: We might need some stack support here to get the values. */
 666 }