drivers/net/wireless/b43/xmit.c

   1 /*
   2
   3   Broadcom B43 wireless driver
   4
   5   Transmission (TX/RX) related functions.
   6
   7   Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
   8   Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
   9   Copyright (C) 2005, 2006 Michael Buesch <mb@bu3sch.de>
  10   Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
  11   Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
  12
  13   This program is free software; you can redistribute it and/or modify
  14   it under the terms of the GNU General Public License as published by
  15   the Free Software Foundation; either version 2 of the License, or
  16   (at your option) any later version.
  17
  18   This program is distributed in the hope that it will be useful,
  19   but WITHOUT ANY WARRANTY; without even the implied warranty of
  20   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21   GNU General Public License for more details.
  22
  23   You should have received a copy of the GNU General Public License
  24   along with this program; see the file COPYING.  If not, write to
  25   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  26   Boston, MA 02110-1301, USA.
  27
  28 */
  29
  30 #include "xmit.h"
  31 #include "phy.h"
  32 #include "dma.h"
  33 #include "pio.h"
  34
  35 /* Extract the bitrate out of a CCK PLCP header. */
  36 static u8 b43_plcp_get_bitrate_cck(struct b43_plcp_hdr6 *plcp)
  37 {
  38         switch (plcp->raw[0]) {
  39         case 0x0A:
  40                 return B43_CCK_RATE_1MB;
  41         case 0x14:
  42                 return B43_CCK_RATE_2MB;
  43         case 0x37:
  44                 return B43_CCK_RATE_5MB;
  45         case 0x6E:
  46                 return B43_CCK_RATE_11MB;
  47         }
  48         B43_WARN_ON(1);
  49         return 0;
  50 }
  51
  52 /* Extract the bitrate out of an OFDM PLCP header. */
  53 static u8 b43_plcp_get_bitrate_ofdm(struct b43_plcp_hdr6 *plcp)
  54 {
  55         switch (plcp->raw[0] & 0xF) {
  56         case 0xB:
  57                 return B43_OFDM_RATE_6MB;
  58         case 0xF:
  59                 return B43_OFDM_RATE_9MB;
  60         case 0xA:
  61                 return B43_OFDM_RATE_12MB;
  62         case 0xE:
  63                 return B43_OFDM_RATE_18MB;
  64         case 0x9:
  65                 return B43_OFDM_RATE_24MB;
  66         case 0xD:
  67                 return B43_OFDM_RATE_36MB;
  68         case 0x8:
  69                 return B43_OFDM_RATE_48MB;
  70         case 0xC:
  71                 return B43_OFDM_RATE_54MB;
  72         }
  73         B43_WARN_ON(1);
  74         return 0;
  75 }
  76
  77 u8 b43_plcp_get_ratecode_cck(const u8 bitrate)
  78 {
  79         switch (bitrate) {
  80         case B43_CCK_RATE_1MB:
  81                 return 0x0A;
  82         case B43_CCK_RATE_2MB:
  83                 return 0x14;
  84         case B43_CCK_RATE_5MB:
  85                 return 0x37;
  86         case B43_CCK_RATE_11MB:
  87                 return 0x6E;
  88         }
  89         B43_WARN_ON(1);
  90         return 0;
  91 }
  92
  93 u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)
  94 {
  95         switch (bitrate) {
  96         case B43_OFDM_RATE_6MB:
  97                 return 0xB;
  98         case B43_OFDM_RATE_9MB:
  99                 return 0xF;
 100         case B43_OFDM_RATE_12MB:
 101                 return 0xA;
 102         case B43_OFDM_RATE_18MB:
 103                 return 0xE;
 104         case B43_OFDM_RATE_24MB:
 105                 return 0x9;
 106         case B43_OFDM_RATE_36MB:
 107                 return 0xD;
 108         case B43_OFDM_RATE_48MB:
 109                 return 0x8;
 110         case B43_OFDM_RATE_54MB:
 111                 return 0xC;
 112         }
 113         B43_WARN_ON(1);
 114         return 0;
 115 }
 116
 117 void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
 118                            const u16 octets, const u8 bitrate)
 119 {
 120         __le32 *data = &(plcp->data);
 121         __u8 *raw = plcp->raw;
 122
 123         if (b43_is_ofdm_rate(bitrate)) {
 124                 u32 d;
 125
 126                 d = b43_plcp_get_ratecode_ofdm(bitrate);
 127                 B43_WARN_ON(octets & 0xF000);
 128                 d |= (octets << 5);
 129                 *data = cpu_to_le32(d);
 130         } else {
 131                 u32 plen;
 132
 133                 plen = octets * 16 / bitrate;
 134                 if ((octets * 16 % bitrate) > 0) {
 135                         plen++;
 136                         if ((bitrate == B43_CCK_RATE_11MB)
 137                             && ((octets * 8 % 11) < 4)) {
 138                                 raw[1] = 0x84;
 139                         } else
 140                                 raw[1] = 0x04;
 141                 } else
 142                         raw[1] = 0x04;
 143                 *data |= cpu_to_le32(plen << 16);
 144                 raw[0] = b43_plcp_get_ratecode_cck(bitrate);
 145         }
 146 }
 147
 148 static u8 b43_calc_fallback_rate(u8 bitrate)
 149 {
 150         switch (bitrate) {
 151         case B43_CCK_RATE_1MB:
 152                 return B43_CCK_RATE_1MB;
 153         case B43_CCK_RATE_2MB:
 154                 return B43_CCK_RATE_1MB;
 155         case B43_CCK_RATE_5MB:
 156                 return B43_CCK_RATE_2MB;
 157         case B43_CCK_RATE_11MB:
 158                 return B43_CCK_RATE_5MB;
 159         case B43_OFDM_RATE_6MB:
 160                 return B43_CCK_RATE_5MB;
 161         case B43_OFDM_RATE_9MB:
 162                 return B43_OFDM_RATE_6MB;
 163         case B43_OFDM_RATE_12MB:
 164                 return B43_OFDM_RATE_9MB;
 165         case B43_OFDM_RATE_18MB:
 166                 return B43_OFDM_RATE_12MB;
 167         case B43_OFDM_RATE_24MB:
 168                 return B43_OFDM_RATE_18MB;
 169         case B43_OFDM_RATE_36MB:
 170                 return B43_OFDM_RATE_24MB;
 171         case B43_OFDM_RATE_48MB:
 172                 return B43_OFDM_RATE_36MB;
 173         case B43_OFDM_RATE_54MB:
 174                 return B43_OFDM_RATE_48MB;
 175         }
 176         B43_WARN_ON(1);
 177         return 0;
 178 }
 179
 180 static void generate_txhdr_fw4(struct b43_wldev *dev,
 181                                struct b43_txhdr_fw4 *txhdr,
 182                                const unsigned char *fragment_data,
 183                                unsigned int fragment_len,
 184                                const struct ieee80211_tx_control *txctl,
 185                                u16 cookie)
 186 {
 187         const struct b43_phy *phy = &dev->phy;
 188         const struct ieee80211_hdr *wlhdr =
 189             (const struct ieee80211_hdr *)fragment_data;
 190         int use_encryption = (!(txctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT));
 191         u16 fctl = le16_to_cpu(wlhdr->frame_control);
 192         u8 rate, rate_fb;
 193         int rate_ofdm, rate_fb_ofdm;
 194         unsigned int plcp_fragment_len;
 195         u32 mac_ctl = 0;
 196         u16 phy_ctl = 0;
 197         u8 extra_ft = 0;
 198
 199         memset(txhdr, 0, sizeof(*txhdr));
 200
 201         rate = txctl->tx_rate;
 202         rate_ofdm = b43_is_ofdm_rate(rate);
 203         rate_fb = (txctl->alt_retry_rate == -1) ? rate : txctl->alt_retry_rate;
 204         rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
 205
 206         if (rate_ofdm)
 207                 txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate);
 208         else
 209                 txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate);
 210         txhdr->mac_frame_ctl = wlhdr->frame_control;
 211         memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
 212
 213         /* Calculate duration for fallback rate */
 214         if ((rate_fb == rate) ||
 215             (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
 216             (wlhdr->duration_id == cpu_to_le16(0))) {
 217                 /* If the fallback rate equals the normal rate or the
 218                  * dur_id field contains an AID, CFP magic or 0,
 219                  * use the original dur_id field. */
 220                 txhdr->dur_fb = wlhdr->duration_id;
 221         } else {
 222                 int fbrate_base100kbps = B43_RATE_TO_BASE100KBPS(rate_fb);
 223                 txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
 224                                                                  dev->wl->if_id,
 225                                                                  fragment_len,
 226                                                                  fbrate_base100kbps);
 227         }
 228
 229         plcp_fragment_len = fragment_len + FCS_LEN;
 230         if (use_encryption) {
 231                 u8 key_idx = (u16) (txctl->key_idx);
 232                 struct b43_key *key;
 233                 int wlhdr_len;
 234                 size_t iv_len;
 235
 236                 B43_WARN_ON(key_idx >= dev->max_nr_keys);
 237                 key = &(dev->key[key_idx]);
 238                 B43_WARN_ON(!key->keyconf);
 239
 240                 /* Hardware appends ICV. */
 241                 plcp_fragment_len += txctl->icv_len;
 242
 243                 key_idx = b43_kidx_to_fw(dev, key_idx);
 244                 mac_ctl |= (key_idx << B43_TX4_MAC_KEYIDX_SHIFT) &
 245                            B43_TX4_MAC_KEYIDX;
 246                 mac_ctl |= (key->algorithm << B43_TX4_MAC_KEYALG_SHIFT) &
 247                            B43_TX4_MAC_KEYALG;
 248                 wlhdr_len = ieee80211_get_hdrlen(fctl);
 249                 iv_len = min((size_t) txctl->iv_len,
 250                              ARRAY_SIZE(txhdr->iv));
 251                 memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
 252         }
 253         b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp),
 254                               plcp_fragment_len, rate);
 255         b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
 256                               plcp_fragment_len, rate_fb);
 257
 258         /* Extra Frame Types */
 259         if (rate_fb_ofdm)
 260                 extra_ft |= B43_TX4_EFT_FBOFDM;
 261
 262         /* Set channel radio code. Note that the micrcode ORs 0x100 to
 263          * this value before comparing it to the value in SHM, if this
 264          * is a 5Ghz packet.
 265          */
 266         txhdr->chan_radio_code = phy->channel;
 267
 268         /* PHY TX Control word */
 269         if (rate_ofdm)
 270                 phy_ctl |= B43_TX4_PHY_OFDM;
 271         if (dev->short_preamble)
 272                 phy_ctl |= B43_TX4_PHY_SHORTPRMBL;
 273         switch (txctl->antenna_sel_tx) {
 274         case 0:
 275                 phy_ctl |= B43_TX4_PHY_ANTLAST;
 276                 break;
 277         case 1:
 278                 phy_ctl |= B43_TX4_PHY_ANT0;
 279                 break;
 280         case 2:
 281                 phy_ctl |= B43_TX4_PHY_ANT1;
 282                 break;
 283         default:
 284                 B43_WARN_ON(1);
 285         }
 286
 287         /* MAC control */
 288         if (!(txctl->flags & IEEE80211_TXCTL_NO_ACK))
 289                 mac_ctl |= B43_TX4_MAC_ACK;
 290         if (!(((fctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
 291               ((fctl & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)))
 292                 mac_ctl |= B43_TX4_MAC_HWSEQ;
 293         if (txctl->flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
 294                 mac_ctl |= B43_TX4_MAC_STMSDU;
 295         if (phy->type == B43_PHYTYPE_A)
 296                 mac_ctl |= B43_TX4_MAC_5GHZ;
 297         if (txctl->flags & IEEE80211_TXCTL_LONG_RETRY_LIMIT)
 298                 mac_ctl |= B43_TX4_MAC_LONGFRAME;
 299
 300         /* Generate the RTS or CTS-to-self frame */
 301         if ((txctl->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
 302             (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
 303                 unsigned int len;
 304                 struct ieee80211_hdr *hdr;
 305                 int rts_rate, rts_rate_fb;
 306                 int rts_rate_ofdm, rts_rate_fb_ofdm;
 307
 308                 rts_rate = txctl->rts_cts_rate;
 309                 rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);
 310                 rts_rate_fb = b43_calc_fallback_rate(rts_rate);
 311                 rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);
 312
 313                 if (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
 314                         ieee80211_ctstoself_get(dev->wl->hw, dev->wl->if_id,
 315                                                 fragment_data, fragment_len,
 316                                                 txctl,
 317                                                 (struct ieee80211_cts *)(txhdr->
 318                                                                          rts_frame));
 319                         mac_ctl |= B43_TX4_MAC_SENDCTS;
 320                         len = sizeof(struct ieee80211_cts);
 321                 } else {
 322                         ieee80211_rts_get(dev->wl->hw, dev->wl->if_id,
 323                                           fragment_data, fragment_len, txctl,
 324                                           (struct ieee80211_rts *)(txhdr->
 325                                                                    rts_frame));
 326                         mac_ctl |= B43_TX4_MAC_SENDRTS;
 327                         len = sizeof(struct ieee80211_rts);
 328                 }
 329                 len += FCS_LEN;
 330                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->
 331                                                                rts_plcp), len,
 332                                       rts_rate);
 333                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->
 334                                                                rts_plcp_fb),
 335                                       len, rts_rate_fb);
 336                 hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
 337                 txhdr->rts_dur_fb = hdr->duration_id;
 338                 if (rts_rate_ofdm) {
 339                         extra_ft |= B43_TX4_EFT_RTSOFDM;
 340                         txhdr->phy_rate_rts =
 341                             b43_plcp_get_ratecode_ofdm(rts_rate);
 342                 } else
 343                         txhdr->phy_rate_rts =
 344                             b43_plcp_get_ratecode_cck(rts_rate);
 345                 if (rts_rate_fb_ofdm)
 346                         extra_ft |= B43_TX4_EFT_RTSFBOFDM;
 347         }
 348
 349         /* Magic cookie */
 350         txhdr->cookie = cpu_to_le16(cookie);
 351
 352         /* Apply the bitfields */
 353         txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 354         txhdr->phy_ctl = cpu_to_le16(phy_ctl);
 355         txhdr->extra_ft = extra_ft;
 356 }
 357
 358 void b43_generate_txhdr(struct b43_wldev *dev,
 359                         u8 * txhdr,
 360                         const unsigned char *fragment_data,
 361                         unsigned int fragment_len,
 362                         const struct ieee80211_tx_control *txctl, u16 cookie)
 363 {
 364         generate_txhdr_fw4(dev, (struct b43_txhdr_fw4 *)txhdr,
 365                            fragment_data, fragment_len, txctl, cookie);
 366 }
 367
 368 static s8 b43_rssi_postprocess(struct b43_wldev *dev,
 369                                u8 in_rssi, int ofdm,
 370                                int adjust_2053, int adjust_2050)
 371 {
 372         struct b43_phy *phy = &dev->phy;
 373         s32 tmp;
 374
 375         switch (phy->radio_ver) {
 376         case 0x2050:
 377                 if (ofdm) {
 378                         tmp = in_rssi;
 379                         if (tmp > 127)
 380                                 tmp -= 256;
 381                         tmp *= 73;
 382                         tmp /= 64;
 383                         if (adjust_2050)
 384                                 tmp += 25;
 385                         else
 386                                 tmp -= 3;
 387                 } else {
 388                         if (dev->dev->bus->sprom.
 389                             boardflags_lo & B43_BFL_RSSI) {
 390                                 if (in_rssi > 63)
 391                                         in_rssi = 63;
 392                                 tmp = phy->nrssi_lt[in_rssi];
 393                                 tmp = 31 - tmp;
 394                                 tmp *= -131;
 395                                 tmp /= 128;
 396                                 tmp -= 57;
 397                         } else {
 398                                 tmp = in_rssi;
 399                                 tmp = 31 - tmp;
 400                                 tmp *= -149;
 401                                 tmp /= 128;
 402                                 tmp -= 68;
 403                         }
 404                         if (phy->type == B43_PHYTYPE_G && adjust_2050)
 405                                 tmp += 25;
 406                 }
 407                 break;
 408         case 0x2060:
 409                 if (in_rssi > 127)
 410                         tmp = in_rssi - 256;
 411                 else
 412                         tmp = in_rssi;
 413                 break;
 414         default:
 415                 tmp = in_rssi;
 416                 tmp -= 11;
 417                 tmp *= 103;
 418                 tmp /= 64;
 419                 if (adjust_2053)
 420                         tmp -= 109;
 421                 else
 422                         tmp -= 83;
 423         }
 424
 425         return (s8) tmp;
 426 }
 427
 428 //TODO
 429 #if 0
 430 static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi)
 431 {
 432         struct b43_phy *phy = &dev->phy;
 433         s8 ret;
 434
 435         if (phy->type == B43_PHYTYPE_A) {
 436                 //TODO: Incomplete specs.
 437                 ret = 0;
 438         } else
 439                 ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1);
 440
 441         return ret;
 442 }
 443 #endif
 444
 445 void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
 446 {
 447         struct ieee80211_rx_status status;
 448         struct b43_plcp_hdr6 *plcp;
 449         struct ieee80211_hdr *wlhdr;
 450         const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;
 451         u16 fctl;
 452         u16 phystat0, phystat3, chanstat, mactime;
 453         u32 macstat;
 454         u16 chanid;
 455         u8 jssi;
 456         int padding;
 457
 458         memset(&status, 0, sizeof(status));
 459
 460         /* Get metadata about the frame from the header. */
 461         phystat0 = le16_to_cpu(rxhdr->phy_status0);
 462         phystat3 = le16_to_cpu(rxhdr->phy_status3);
 463         jssi = rxhdr->jssi;
 464         macstat = le32_to_cpu(rxhdr->mac_status);
 465         mactime = le16_to_cpu(rxhdr->mac_time);
 466         chanstat = le16_to_cpu(rxhdr->channel);
 467
 468         if (macstat & B43_RX_MAC_FCSERR)
 469                 dev->wl->ieee_stats.dot11FCSErrorCount++;
 470         if (macstat & B43_RX_MAC_DECERR) {
 471                 /* Decryption with the given key failed.
 472                  * Drop the packet. We also won't be able to decrypt it with
 473                  * the key in software. */
 474                 goto drop;
 475         }
 476
 477         /* Skip PLCP and padding */
 478         padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
 479         if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {
 480                 b43dbg(dev->wl, "RX: Packet size underrun (1)\n");
 481                 goto drop;
 482         }
 483         plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);
 484         skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);
 485         /* The skb contains the Wireless Header + payload data now */
 486         if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */  + FCS_LEN))) {
 487                 b43dbg(dev->wl, "RX: Packet size underrun (2)\n");
 488                 goto drop;
 489         }
 490         wlhdr = (struct ieee80211_hdr *)(skb->data);
 491         fctl = le16_to_cpu(wlhdr->frame_control);
 492         skb_trim(skb, skb->len - FCS_LEN);
 493
 494         if (macstat & B43_RX_MAC_DEC) {
 495                 unsigned int keyidx;
 496                 int wlhdr_len;
 497
 498                 keyidx = ((macstat & B43_RX_MAC_KEYIDX)
 499                           >> B43_RX_MAC_KEYIDX_SHIFT);
 500                 /* We must adjust the key index here. We want the "physical"
 501                  * key index, but the ucode passed it slightly different.
 502                  */
 503                 keyidx = b43_kidx_to_raw(dev, keyidx);
 504                 B43_WARN_ON(keyidx >= dev->max_nr_keys);
 505
 506                 if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
 507                         wlhdr_len = ieee80211_get_hdrlen(fctl);
 508                         if (unlikely(skb->len < (wlhdr_len + 3))) {
 509                                 b43dbg(dev->wl,
 510                                        "RX: Packet size underrun (3)\n");
 511                                 goto drop;
 512                         }
 513                         status.flag |= RX_FLAG_DECRYPTED;
 514                 }
 515         }
 516
 517         status.ssi = b43_rssi_postprocess(dev, jssi,
 518                                           (phystat0 & B43_RX_PHYST0_OFDM),
 519                                           (phystat0 & B43_RX_PHYST0_GAINCTL),
 520                                           (phystat3 & B43_RX_PHYST3_TRSTATE));
 521         status.noise = dev->stats.link_noise;
 522         /* the next line looks wrong, but is what mac80211 wants */
 523         status.signal = (jssi * 100) / B43_RX_MAX_SSI;
 524         if (phystat0 & B43_RX_PHYST0_OFDM)
 525                 status.rate = b43_plcp_get_bitrate_ofdm(plcp);
 526         else
 527                 status.rate = b43_plcp_get_bitrate_cck(plcp);
 528         status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
 529         status.mactime = mactime;
 530         status.flag |= RX_FLAG_TSFT;
 531
 532         chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
 533         switch (chanstat & B43_RX_CHAN_PHYTYPE) {
 534         case B43_PHYTYPE_A:
 535                 status.phymode = MODE_IEEE80211A;
 536                 B43_WARN_ON(1);
 537                 /* FIXME: We don't really know which value the "chanid" contains.
 538                  *        So the following assignment might be wrong. */
 539                 status.channel = chanid;
 540                 status.freq = b43_channel_to_freq_5ghz(status.channel);
 541                 break;
 542         case B43_PHYTYPE_G:
 543                 status.phymode = MODE_IEEE80211G;
 544                 /* chanid is the radio channel cookie value as used
 545                  * to tune the radio. */
 546                 status.freq = chanid + 2400;
 547                 status.channel = b43_freq_to_channel_2ghz(status.freq);
 548                 break;
 549         case B43_PHYTYPE_N:
 550                 status.phymode = 0xDEAD /*FIXME MODE_IEEE80211N*/;
 551                 /* chanid is the SHM channel cookie. Which is the plain
 552                  * channel number in b43. */
 553                 status.channel = chanid;
 554                 if (chanstat & B43_RX_CHAN_5GHZ)
 555                         status.freq = b43_freq_to_channel_5ghz(status.freq);
 556                 else
 557                         status.freq = b43_freq_to_channel_2ghz(status.freq);
 558                 break;
 559         default:
 560                 B43_WARN_ON(1);
 561                 goto drop;
 562         }
 563
 564         dev->stats.last_rx = jiffies;
 565         ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
 566
 567         return;
 568 drop:
 569         b43dbg(dev->wl, "RX: Packet dropped\n");
 570         dev_kfree_skb_any(skb);
 571 }
 572
 573 void b43_handle_txstatus(struct b43_wldev *dev,
 574                          const struct b43_txstatus *status)
 575 {
 576         b43_debugfs_log_txstat(dev, status);
 577
 578         if (status->intermediate)
 579                 return;
 580         if (status->for_ampdu)
 581                 return;
 582         if (!status->acked)
 583                 dev->wl->ieee_stats.dot11ACKFailureCount++;
 584         if (status->rts_count) {
 585                 if (status->rts_count == 0xF)   //FIXME
 586                         dev->wl->ieee_stats.dot11RTSFailureCount++;
 587                 else
 588                         dev->wl->ieee_stats.dot11RTSSuccessCount++;
 589         }
 590
 591         if (b43_using_pio(dev))
 592                 b43_pio_handle_txstatus(dev, status);
 593         else
 594                 b43_dma_handle_txstatus(dev, status);
 595 }
 596
 597 /* Handle TX status report as received through DMA/PIO queues */
 598 void b43_handle_hwtxstatus(struct b43_wldev *dev,
 599                            const struct b43_hwtxstatus *hw)
 600 {
 601         struct b43_txstatus status;
 602         u8 tmp;
 603
 604         status.cookie = le16_to_cpu(hw->cookie);
 605         status.seq = le16_to_cpu(hw->seq);
 606         status.phy_stat = hw->phy_stat;
 607         tmp = hw->count;
 608         status.frame_count = (tmp >> 4);
 609         status.rts_count = (tmp & 0x0F);
 610         tmp = hw->flags;
 611         status.supp_reason = ((tmp & 0x1C) >> 2);
 612         status.pm_indicated = !!(tmp & 0x80);
 613         status.intermediate = !!(tmp & 0x40);
 614         status.for_ampdu = !!(tmp & 0x20);
 615         status.acked = !!(tmp & 0x02);
 616
 617         b43_handle_txstatus(dev, &status);
 618 }
 619
 620 /* Stop any TX operation on the device (suspend the hardware queues) */
 621 void b43_tx_suspend(struct b43_wldev *dev)
 622 {
 623         if (b43_using_pio(dev))
 624                 b43_pio_freeze_txqueues(dev);
 625         else
 626                 b43_dma_tx_suspend(dev);
 627 }
 628
 629 /* Resume any TX operation on the device (resume the hardware queues) */
 630 void b43_tx_resume(struct b43_wldev *dev)
 631 {
 632         if (b43_using_pio(dev))
 633                 b43_pio_thaw_txqueues(dev);
 634         else
 635                 b43_dma_tx_resume(dev);
 636 }
 637
 638 #if 0
 639 static void upload_qos_parms(struct b43_wldev *dev,
 640                              const u16 * parms, u16 offset)
 641 {
 642         int i;
 643
 644         for (i = 0; i < B43_NR_QOSPARMS; i++) {
 645                 b43_shm_write16(dev, B43_SHM_SHARED,
 646                                 offset + (i * 2), parms[i]);
 647         }
 648 }
 649 #endif
 650
 651 /* Initialize the QoS parameters */
 652 void b43_qos_init(struct b43_wldev *dev)
 653 {
 654         /* FIXME: This function must probably be called from the mac80211
 655          * config callback. */
 656         return;
 657
 658         b43_hf_write(dev, b43_hf_read(dev) | B43_HF_EDCF);
 659         //FIXME kill magic
 660         b43_write16(dev, 0x688, b43_read16(dev, 0x688) | 0x4);
 661
 662         /*TODO: We might need some stack support here to get the values. */
 663 }