linux/drivers/net/wireless/b43legacy/xmit.c
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   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. */
  40static 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. */
  57static 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
  84u8 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
 100u8 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
 124void 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
 155static 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
 187static 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, ETH_ALEN);
 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_t(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(&txhdr->plcp_fb, plcp_fragment_len,
 273                                    rate_fb->hw_value);
 274
 275        /* PHY TX Control word */
 276        if (rate_ofdm)
 277                phy_ctl |= B43legacy_TX4_PHY_ENC_OFDM;
 278        if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 279                phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
 280        phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
 281
 282        /* MAC control */
 283        rates = info->control.rates;
 284        if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 285                mac_ctl |= B43legacy_TX4_MAC_ACK;
 286        if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 287                mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
 288        if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 289                mac_ctl |= B43legacy_TX4_MAC_STMSDU;
 290        if (rate_fb_ofdm)
 291                mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
 292
 293        /* Overwrite rates[0].count to make the retry calculation
 294         * in the tx status easier. need the actual retry limit to
 295         * detect whether the fallback rate was used.
 296         */
 297        if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 298            (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
 299                rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
 300                mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
 301        } else {
 302                rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
 303        }
 304
 305        /* Generate the RTS or CTS-to-self frame */
 306        if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 307            (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
 308                unsigned int len;
 309                struct ieee80211_hdr *hdr;
 310                int rts_rate;
 311                int rts_rate_fb;
 312                int rts_rate_fb_ofdm;
 313
 314                rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
 315                rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
 316                rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
 317                if (rts_rate_fb_ofdm)
 318                        mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
 319
 320                if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 321                        ieee80211_ctstoself_get(dev->wl->hw,
 322                                                info->control.vif,
 323                                                fragment_data,
 324                                                fragment_len, info,
 325                                                (struct ieee80211_cts *)
 326                                                (txhdr->rts_frame));
 327                        mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
 328                        len = sizeof(struct ieee80211_cts);
 329                } else {
 330                        ieee80211_rts_get(dev->wl->hw,
 331                                          info->control.vif,
 332                                          fragment_data, fragment_len, info,
 333                                          (struct ieee80211_rts *)
 334                                          (txhdr->rts_frame));
 335                        mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
 336                        len = sizeof(struct ieee80211_rts);
 337                }
 338                len += FCS_LEN;
 339                b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 340                                            (&txhdr->rts_plcp),
 341                                            len, rts_rate);
 342                b43legacy_generate_plcp_hdr(&txhdr->rts_plcp_fb,
 343                                            len, rts_rate_fb);
 344                hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
 345                txhdr->rts_dur_fb = hdr->duration_id;
 346        }
 347
 348        /* Magic cookie */
 349        txhdr->cookie = cpu_to_le16(cookie);
 350
 351        /* Apply the bitfields */
 352        txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 353        txhdr->phy_ctl = cpu_to_le16(phy_ctl);
 354
 355        return 0;
 356}
 357
 358int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
 359                              u8 *txhdr,
 360                              const unsigned char *fragment_data,
 361                              unsigned int fragment_len,
 362                              struct ieee80211_tx_info *info,
 363                              u16 cookie)
 364{
 365        return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
 366                           fragment_data, fragment_len,
 367                           info, cookie);
 368}
 369
 370static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
 371                                     u8 in_rssi, int ofdm,
 372                                     int adjust_2053, int adjust_2050)
 373{
 374        struct b43legacy_phy *phy = &dev->phy;
 375        s32 tmp;
 376
 377        switch (phy->radio_ver) {
 378        case 0x2050:
 379                if (ofdm) {
 380                        tmp = in_rssi;
 381                        if (tmp > 127)
 382                                tmp -= 256;
 383                        tmp *= 73;
 384                        tmp /= 64;
 385                        if (adjust_2050)
 386                                tmp += 25;
 387                        else
 388                                tmp -= 3;
 389                } else {
 390                        if (dev->dev->bus->sprom.boardflags_lo
 391                            & B43legacy_BFL_RSSI) {
 392                                if (in_rssi > 63)
 393                                        in_rssi = 63;
 394                                tmp = phy->nrssi_lt[in_rssi];
 395                                tmp = 31 - tmp;
 396                                tmp *= -131;
 397                                tmp /= 128;
 398                                tmp -= 57;
 399                        } else {
 400                                tmp = in_rssi;
 401                                tmp = 31 - tmp;
 402                                tmp *= -149;
 403                                tmp /= 128;
 404                                tmp -= 68;
 405                        }
 406                        if (phy->type == B43legacy_PHYTYPE_G &&
 407                            adjust_2050)
 408                                tmp += 25;
 409                }
 410                break;
 411        case 0x2060:
 412                if (in_rssi > 127)
 413                        tmp = in_rssi - 256;
 414                else
 415                        tmp = in_rssi;
 416                break;
 417        default:
 418                tmp = in_rssi;
 419                tmp -= 11;
 420                tmp *= 103;
 421                tmp /= 64;
 422                if (adjust_2053)
 423                        tmp -= 109;
 424                else
 425                        tmp -= 83;
 426        }
 427
 428        return (s8)tmp;
 429}
 430
 431void b43legacy_rx(struct b43legacy_wldev *dev,
 432                  struct sk_buff *skb,
 433                  const void *_rxhdr)
 434{
 435        struct ieee80211_rx_status status;
 436        struct b43legacy_plcp_hdr6 *plcp;
 437        struct ieee80211_hdr *wlhdr;
 438        const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
 439        __le16 fctl;
 440        u16 phystat0;
 441        u16 phystat3;
 442        u16 chanstat;
 443        u16 mactime;
 444        u32 macstat;
 445        u16 chanid;
 446        u8 jssi;
 447        int padding;
 448
 449        memset(&status, 0, sizeof(status));
 450
 451        /* Get metadata about the frame from the header. */
 452        phystat0 = le16_to_cpu(rxhdr->phy_status0);
 453        phystat3 = le16_to_cpu(rxhdr->phy_status3);
 454        jssi = rxhdr->jssi;
 455        macstat = le16_to_cpu(rxhdr->mac_status);
 456        mactime = le16_to_cpu(rxhdr->mac_time);
 457        chanstat = le16_to_cpu(rxhdr->channel);
 458
 459        if (macstat & B43legacy_RX_MAC_FCSERR)
 460                dev->wl->ieee_stats.dot11FCSErrorCount++;
 461
 462        /* Skip PLCP and padding */
 463        padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
 464        if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
 465            padding))) {
 466                b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
 467                goto drop;
 468        }
 469        plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
 470        skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
 471        /* The skb contains the Wireless Header + payload data now */
 472        if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
 473                b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
 474                goto drop;
 475        }
 476        wlhdr = (struct ieee80211_hdr *)(skb->data);
 477        fctl = wlhdr->frame_control;
 478
 479        if ((macstat & B43legacy_RX_MAC_DEC) &&
 480            !(macstat & B43legacy_RX_MAC_DECERR)) {
 481                unsigned int keyidx;
 482                int wlhdr_len;
 483                int iv_len;
 484                int icv_len;
 485
 486                keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
 487                          >> B43legacy_RX_MAC_KEYIDX_SHIFT);
 488                /* We must adjust the key index here. We want the "physical"
 489                 * key index, but the ucode passed it slightly different.
 490                 */
 491                keyidx = b43legacy_kidx_to_raw(dev, keyidx);
 492                B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
 493
 494                if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
 495                        /* Remove PROTECTED flag to mark it as decrypted. */
 496                        B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
 497                        fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 498                        wlhdr->frame_control = fctl;
 499
 500                        wlhdr_len = ieee80211_hdrlen(fctl);
 501                        if (unlikely(skb->len < (wlhdr_len + 3))) {
 502                                b43legacydbg(dev->wl, "RX: Packet size"
 503                                             " underrun3\n");
 504                                goto drop;
 505                        }
 506                        if (skb->data[wlhdr_len + 3] & (1 << 5)) {
 507                                /* The Ext-IV Bit is set in the "KeyID"
 508                                 * octet of the IV.
 509                                 */
 510                                iv_len = 8;
 511                                icv_len = 8;
 512                        } else {
 513                                iv_len = 4;
 514                                icv_len = 4;
 515                        }
 516                        if (unlikely(skb->len < (wlhdr_len + iv_len +
 517                            icv_len))) {
 518                                b43legacydbg(dev->wl, "RX: Packet size"
 519                                             " underrun4\n");
 520                                goto drop;
 521                        }
 522                        /* Remove the IV */
 523                        memmove(skb->data + iv_len, skb->data, wlhdr_len);
 524                        skb_pull(skb, iv_len);
 525                        /* Remove the ICV */
 526                        skb_trim(skb, skb->len - icv_len);
 527
 528                        status.flag |= RX_FLAG_DECRYPTED;
 529                }
 530        }
 531
 532        status.signal = b43legacy_rssi_postprocess(dev, jssi,
 533                                      (phystat0 & B43legacy_RX_PHYST0_OFDM),
 534                                      (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
 535                                      (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
 536        /* change to support A PHY */
 537        if (phystat0 & B43legacy_RX_PHYST0_OFDM)
 538                status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
 539        else
 540                status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
 541        status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
 542
 543        /*
 544         * All frames on monitor interfaces and beacons always need a full
 545         * 64-bit timestamp. Monitor interfaces need it for diagnostic
 546         * purposes and beacons for IBSS merging.
 547         * This code assumes we get to process the packet within 16 bits
 548         * of timestamp, i.e. about 65 milliseconds after the PHY received
 549         * the first symbol.
 550         */
 551        if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
 552                u16 low_mactime_now;
 553
 554                b43legacy_tsf_read(dev, &status.mactime);
 555                low_mactime_now = status.mactime;
 556                status.mactime = status.mactime & ~0xFFFFULL;
 557                status.mactime += mactime;
 558                if (low_mactime_now <= mactime)
 559                        status.mactime -= 0x10000;
 560                status.flag |= RX_FLAG_MACTIME_START;
 561        }
 562
 563        chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
 564                  B43legacy_RX_CHAN_ID_SHIFT;
 565        switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
 566        case B43legacy_PHYTYPE_B:
 567        case B43legacy_PHYTYPE_G:
 568                status.band = IEEE80211_BAND_2GHZ;
 569                status.freq = chanid + 2400;
 570                break;
 571        default:
 572                b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
 573                       chanstat);
 574        }
 575
 576        memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
 577        ieee80211_rx_irqsafe(dev->wl->hw, skb);
 578
 579        return;
 580drop:
 581        b43legacydbg(dev->wl, "RX: Packet dropped\n");
 582        dev_kfree_skb_any(skb);
 583}
 584
 585void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
 586                             const struct b43legacy_txstatus *status)
 587{
 588        b43legacy_debugfs_log_txstat(dev, status);
 589
 590        if (status->intermediate)
 591                return;
 592        if (status->for_ampdu)
 593                return;
 594        if (!status->acked)
 595                dev->wl->ieee_stats.dot11ACKFailureCount++;
 596        if (status->rts_count) {
 597                if (status->rts_count == 0xF) /* FIXME */
 598                        dev->wl->ieee_stats.dot11RTSFailureCount++;
 599                else
 600                        dev->wl->ieee_stats.dot11RTSSuccessCount++;
 601        }
 602
 603        if (b43legacy_using_pio(dev))
 604                b43legacy_pio_handle_txstatus(dev, status);
 605        else
 606                b43legacy_dma_handle_txstatus(dev, status);
 607}
 608
 609/* Handle TX status report as received through DMA/PIO queues */
 610void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
 611                                 const struct b43legacy_hwtxstatus *hw)
 612{
 613        struct b43legacy_txstatus status;
 614        u8 tmp;
 615
 616        status.cookie = le16_to_cpu(hw->cookie);
 617        status.seq = le16_to_cpu(hw->seq);
 618        status.phy_stat = hw->phy_stat;
 619        tmp = hw->count;
 620        status.frame_count = (tmp >> 4);
 621        status.rts_count = (tmp & 0x0F);
 622        tmp = hw->flags << 1;
 623        status.supp_reason = ((tmp & 0x1C) >> 2);
 624        status.pm_indicated = !!(tmp & 0x80);
 625        status.intermediate = !!(tmp & 0x40);
 626        status.for_ampdu = !!(tmp & 0x20);
 627        status.acked = !!(tmp & 0x02);
 628
 629        b43legacy_handle_txstatus(dev, &status);
 630}
 631
 632/* Stop any TX operation on the device (suspend the hardware queues) */
 633void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
 634{
 635        if (b43legacy_using_pio(dev))
 636                b43legacy_pio_freeze_txqueues(dev);
 637        else
 638                b43legacy_dma_tx_suspend(dev);
 639}
 640
 641/* Resume any TX operation on the device (resume the hardware queues) */
 642void b43legacy_tx_resume(struct b43legacy_wldev *dev)
 643{
 644        if (b43legacy_using_pio(dev))
 645                b43legacy_pio_thaw_txqueues(dev);
 646        else
 647                b43legacy_dma_tx_resume(dev);
 648}
 649
 650/* Initialize the QoS parameters */
 651void b43legacy_qos_init(struct b43legacy_wldev *dev)
 652{
 653        /* FIXME: This function must probably be called from the mac80211
 654         * config callback. */
 655return;
 656
 657        b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
 658        /* FIXME kill magic */
 659        b43legacy_write16(dev, 0x688,
 660                          b43legacy_read16(dev, 0x688) | 0x4);
 661
 662
 663        /*TODO: We might need some stack support here to get the values. */
 664}
 665