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_info *info,
 192                                u16 cookie)
 193 {
 194         const struct ieee80211_hdr *wlhdr;
 195         int use_encryption = (!(info->flags & IEEE80211_TX_CTL_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         struct ieee80211_rate *tx_rate;
 205
 206         wlhdr = (const struct ieee80211_hdr *)fragment_data;
 207         fctl = le16_to_cpu(wlhdr->frame_control);
 208
 209         memset(txhdr, 0, sizeof(*txhdr));
 210
 211         tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);
 212
 213         rate = tx_rate->hw_value;
 214         rate_ofdm = b43legacy_is_ofdm_rate(rate);
 215         rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : tx_rate;
 216         rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
 217
 218         txhdr->mac_frame_ctl = wlhdr->frame_control;
 219         memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
 220
 221         /* Calculate duration for fallback rate */
 222         if ((rate_fb->hw_value == rate) ||
 223             (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
 224             (wlhdr->duration_id == cpu_to_le16(0))) {
 225                 /* If the fallback rate equals the normal rate or the
 226                  * dur_id field contains an AID, CFP magic or 0,
 227                  * use the original dur_id field. */
 228                 txhdr->dur_fb = wlhdr->duration_id;
 229         } else {
 230                 txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
 231                                                          info->control.vif,
 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.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_get_hdrlen(fctl);
 257                         iv_len = min((size_t)info->control.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_OFDM;
 279         if (dev->short_preamble)
 280                 phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
 281         switch (info->antenna_sel_tx) {
 282         case 0:
 283                 phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
 284                 break;
 285         case 1:
 286                 phy_ctl |= B43legacy_TX4_PHY_ANT0;
 287                 break;
 288         case 2:
 289                 phy_ctl |= B43legacy_TX4_PHY_ANT1;
 290                 break;
 291         default:
 292                 B43legacy_BUG_ON(1);
 293         }
 294
 295         /* MAC control */
 296         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 297                 mac_ctl |= B43legacy_TX4_MAC_ACK;
 298         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 299                 mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
 300         if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 301                 mac_ctl |= B43legacy_TX4_MAC_STMSDU;
 302         if (rate_fb_ofdm)
 303                 mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
 304         if (info->flags & IEEE80211_TX_CTL_LONG_RETRY_LIMIT)
 305                 mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
 306
 307         /* Generate the RTS or CTS-to-self frame */
 308         if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) ||
 309             (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) {
 310                 unsigned int len;
 311                 struct ieee80211_hdr *hdr;
 312                 int rts_rate;
 313                 int rts_rate_fb;
 314                 int rts_rate_ofdm;
 315                 int rts_rate_fb_ofdm;
 316
 317                 rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
 318                 rts_rate_ofdm = b43legacy_is_ofdm_rate(rts_rate);
 319                 rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
 320                 rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
 321                 if (rts_rate_fb_ofdm)
 322                         mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
 323
 324                 if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
 325                         ieee80211_ctstoself_get(dev->wl->hw,
 326                                                 info->control.vif,
 327                                                 fragment_data,
 328                                                 fragment_len, info,
 329                                                 (struct ieee80211_cts *)
 330                                                 (txhdr->rts_frame));
 331                         mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
 332                         len = sizeof(struct ieee80211_cts);
 333                 } else {
 334                         ieee80211_rts_get(dev->wl->hw,
 335                                           info->control.vif,
 336                                           fragment_data, fragment_len, info,
 337                                           (struct ieee80211_rts *)
 338                                           (txhdr->rts_frame));
 339                         mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
 340                         len = sizeof(struct ieee80211_rts);
 341                 }
 342                 len += FCS_LEN;
 343                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 344                                             (&txhdr->rts_plcp),
 345                                             len, rts_rate);
 346                 b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 347                                             (&txhdr->rts_plcp_fb),
 348                                             len, rts_rate_fb);
 349                 hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
 350                 txhdr->rts_dur_fb = hdr->duration_id;
 351         }
 352
 353         /* Magic cookie */
 354         txhdr->cookie = cpu_to_le16(cookie);
 355
 356         /* Apply the bitfields */
 357         txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 358         txhdr->phy_ctl = cpu_to_le16(phy_ctl);
 359
 360         return 0;
 361 }
 362
 363 int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
 364                               u8 *txhdr,
 365                               const unsigned char *fragment_data,
 366                               unsigned int fragment_len,
 367                               const struct ieee80211_tx_info *info,
 368                               u16 cookie)
 369 {
 370         return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
 371                            fragment_data, fragment_len,
 372                            info, cookie);
 373 }
 374
 375 static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
 376                                      u8 in_rssi, int ofdm,
 377                                      int adjust_2053, int adjust_2050)
 378 {
 379         struct b43legacy_phy *phy = &dev->phy;
 380         s32 tmp;
 381
 382         switch (phy->radio_ver) {
 383         case 0x2050:
 384                 if (ofdm) {
 385                         tmp = in_rssi;
 386                         if (tmp > 127)
 387                                 tmp -= 256;
 388                         tmp *= 73;
 389                         tmp /= 64;
 390                         if (adjust_2050)
 391                                 tmp += 25;
 392                         else
 393                                 tmp -= 3;
 394                 } else {
 395                         if (dev->dev->bus->sprom.boardflags_lo
 396                             & B43legacy_BFL_RSSI) {
 397                                 if (in_rssi > 63)
 398                                         in_rssi = 63;
 399                                 tmp = phy->nrssi_lt[in_rssi];
 400                                 tmp = 31 - tmp;
 401                                 tmp *= -131;
 402                                 tmp /= 128;
 403                                 tmp -= 57;
 404                         } else {
 405                                 tmp = in_rssi;
 406                                 tmp = 31 - tmp;
 407                                 tmp *= -149;
 408                                 tmp /= 128;
 409                                 tmp -= 68;
 410                         }
 411                         if (phy->type == B43legacy_PHYTYPE_G &&
 412                             adjust_2050)
 413                                 tmp += 25;
 414                 }
 415                 break;
 416         case 0x2060:
 417                 if (in_rssi > 127)
 418                         tmp = in_rssi - 256;
 419                 else
 420                         tmp = in_rssi;
 421                 break;
 422         default:
 423                 tmp = in_rssi;
 424                 tmp -= 11;
 425                 tmp *= 103;
 426                 tmp /= 64;
 427                 if (adjust_2053)
 428                         tmp -= 109;
 429                 else
 430                         tmp -= 83;
 431         }
 432
 433         return (s8)tmp;
 434 }
 435
 436 void b43legacy_rx(struct b43legacy_wldev *dev,
 437                   struct sk_buff *skb,
 438                   const void *_rxhdr)
 439 {
 440         struct ieee80211_rx_status status;
 441         struct b43legacy_plcp_hdr6 *plcp;
 442         struct ieee80211_hdr *wlhdr;
 443         const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
 444         __le16 fctl;
 445         u16 phystat0;
 446         u16 phystat3;
 447         u16 chanstat;
 448         u16 mactime;
 449         u32 macstat;
 450         u16 chanid;
 451         u8 jssi;
 452         int padding;
 453
 454         memset(&status, 0, sizeof(status));
 455
 456         /* Get metadata about the frame from the header. */
 457         phystat0 = le16_to_cpu(rxhdr->phy_status0);
 458         phystat3 = le16_to_cpu(rxhdr->phy_status3);
 459         jssi = rxhdr->jssi;
 460         macstat = le16_to_cpu(rxhdr->mac_status);
 461         mactime = le16_to_cpu(rxhdr->mac_time);
 462         chanstat = le16_to_cpu(rxhdr->channel);
 463
 464         if (macstat & B43legacy_RX_MAC_FCSERR)
 465                 dev->wl->ieee_stats.dot11FCSErrorCount++;
 466
 467         /* Skip PLCP and padding */
 468         padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
 469         if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
 470             padding))) {
 471                 b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
 472                 goto drop;
 473         }
 474         plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
 475         skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
 476         /* The skb contains the Wireless Header + payload data now */
 477         if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
 478                 b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
 479                 goto drop;
 480         }
 481         wlhdr = (struct ieee80211_hdr *)(skb->data);
 482         fctl = wlhdr->frame_control;
 483
 484         if ((macstat & B43legacy_RX_MAC_DEC) &&
 485             !(macstat & B43legacy_RX_MAC_DECERR)) {
 486                 unsigned int keyidx;
 487                 int wlhdr_len;
 488                 int iv_len;
 489                 int icv_len;
 490
 491                 keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
 492                           >> B43legacy_RX_MAC_KEYIDX_SHIFT);
 493                 /* We must adjust the key index here. We want the "physical"
 494                  * key index, but the ucode passed it slightly different.
 495                  */
 496                 keyidx = b43legacy_kidx_to_raw(dev, keyidx);
 497                 B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
 498
 499                 if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
 500                         /* Remove PROTECTED flag to mark it as decrypted. */
 501                         B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
 502                         fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 503                         wlhdr->frame_control = fctl;
 504
 505                         wlhdr_len = ieee80211_hdrlen(fctl);
 506                         if (unlikely(skb->len < (wlhdr_len + 3))) {
 507                                 b43legacydbg(dev->wl, "RX: Packet size"
 508                                              " underrun3\n");
 509                                 goto drop;
 510                         }
 511                         if (skb->data[wlhdr_len + 3] & (1 << 5)) {
 512                                 /* The Ext-IV Bit is set in the "KeyID"
 513                                  * octet of the IV.
 514                                  */
 515                                 iv_len = 8;
 516                                 icv_len = 8;
 517                         } else {
 518                                 iv_len = 4;
 519                                 icv_len = 4;
 520                         }
 521                         if (unlikely(skb->len < (wlhdr_len + iv_len +
 522                             icv_len))) {
 523                                 b43legacydbg(dev->wl, "RX: Packet size"
 524                                              " underrun4\n");
 525                                 goto drop;
 526                         }
 527                         /* Remove the IV */
 528                         memmove(skb->data + iv_len, skb->data, wlhdr_len);
 529                         skb_pull(skb, iv_len);
 530                         /* Remove the ICV */
 531                         skb_trim(skb, skb->len - icv_len);
 532
 533                         status.flag |= RX_FLAG_DECRYPTED;
 534                 }
 535         }
 536
 537         status.signal = b43legacy_rssi_postprocess(dev, jssi,
 538                                       (phystat0 & B43legacy_RX_PHYST0_OFDM),
 539                                       (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
 540                                       (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
 541         status.noise = dev->stats.link_noise;
 542         status.qual = (jssi * 100) / B43legacy_RX_MAX_SSI;
 543         /* change to support A PHY */
 544         if (phystat0 & B43legacy_RX_PHYST0_OFDM)
 545                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
 546         else
 547                 status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
 548         status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
 549
 550         /*
 551          * All frames on monitor interfaces and beacons always need a full
 552          * 64-bit timestamp. Monitor interfaces need it for diagnostic
 553          * purposes and beacons for IBSS merging.
 554          * This code assumes we get to process the packet within 16 bits
 555          * of timestamp, i.e. about 65 milliseconds after the PHY received
 556          * the first symbol.
 557          */
 558         if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
 559                 u16 low_mactime_now;
 560
 561                 b43legacy_tsf_read(dev, &status.mactime);
 562                 low_mactime_now = status.mactime;
 563                 status.mactime = status.mactime & ~0xFFFFULL;
 564                 status.mactime += mactime;
 565                 if (low_mactime_now <= mactime)
 566                         status.mactime -= 0x10000;
 567                 status.flag |= RX_FLAG_TSFT;
 568         }
 569
 570         chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
 571                   B43legacy_RX_CHAN_ID_SHIFT;
 572         switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
 573         case B43legacy_PHYTYPE_B:
 574         case B43legacy_PHYTYPE_G:
 575                 status.band = IEEE80211_BAND_2GHZ;
 576                 status.freq = chanid + 2400;
 577                 break;
 578         default:
 579                 b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
 580                        chanstat);
 581         }
 582
 583         dev->stats.last_rx = jiffies;
 584         ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
 585
 586         return;
 587 drop:
 588         b43legacydbg(dev->wl, "RX: Packet dropped\n");
 589         dev_kfree_skb_any(skb);
 590 }
 591
 592 void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
 593                              const struct b43legacy_txstatus *status)
 594 {
 595         b43legacy_debugfs_log_txstat(dev, status);
 596
 597         if (status->intermediate)
 598                 return;
 599         if (status->for_ampdu)
 600                 return;
 601         if (!status->acked)
 602                 dev->wl->ieee_stats.dot11ACKFailureCount++;
 603         if (status->rts_count) {
 604                 if (status->rts_count == 0xF) /* FIXME */
 605                         dev->wl->ieee_stats.dot11RTSFailureCount++;
 606                 else
 607                         dev->wl->ieee_stats.dot11RTSSuccessCount++;
 608         }
 609
 610         if (b43legacy_using_pio(dev))
 611                 b43legacy_pio_handle_txstatus(dev, status);
 612         else
 613                 b43legacy_dma_handle_txstatus(dev, status);
 614 }
 615
 616 /* Handle TX status report as received through DMA/PIO queues */
 617 void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
 618                                  const struct b43legacy_hwtxstatus *hw)
 619 {
 620         struct b43legacy_txstatus status;
 621         u8 tmp;
 622
 623         status.cookie = le16_to_cpu(hw->cookie);
 624         status.seq = le16_to_cpu(hw->seq);
 625         status.phy_stat = hw->phy_stat;
 626         tmp = hw->count;
 627         status.frame_count = (tmp >> 4);
 628         status.rts_count = (tmp & 0x0F);
 629         tmp = hw->flags;
 630         status.supp_reason = ((tmp & 0x1C) >> 2);
 631         status.pm_indicated = !!(tmp & 0x80);
 632         status.intermediate = !!(tmp & 0x40);
 633         status.for_ampdu = !!(tmp & 0x20);
 634         status.acked = !!(tmp & 0x02);
 635
 636         b43legacy_handle_txstatus(dev, &status);
 637 }
 638
 639 /* Stop any TX operation on the device (suspend the hardware queues) */
 640 void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
 641 {
 642         if (b43legacy_using_pio(dev))
 643                 b43legacy_pio_freeze_txqueues(dev);
 644         else
 645                 b43legacy_dma_tx_suspend(dev);
 646 }
 647
 648 /* Resume any TX operation on the device (resume the hardware queues) */
 649 void b43legacy_tx_resume(struct b43legacy_wldev *dev)
 650 {
 651         if (b43legacy_using_pio(dev))
 652                 b43legacy_pio_thaw_txqueues(dev);
 653         else
 654                 b43legacy_dma_tx_resume(dev);
 655 }
 656
 657 /* Initialize the QoS parameters */
 658 void b43legacy_qos_init(struct b43legacy_wldev *dev)
 659 {
 660         /* FIXME: This function must probably be called from the mac80211
 661          * config callback. */
 662 return;
 663
 664         b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
 665         /* FIXME kill magic */
 666         b43legacy_write16(dev, 0x688,
 667                           b43legacy_read16(dev, 0x688) | 0x4);
 668
 669
 670         /*TODO: We might need some stack support here to get the values. */
 671 }