linux/drivers/net/wireless/broadcom/b43legacy/xmit.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3
   4  Broadcom B43legacy wireless driver
   5
   6  Transmission (TX/RX) related functions.
   7
   8  Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
   9  Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
  10  Copyright (C) 2005, 2006 Michael Buesch <m@bues.ch>
  11  Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
  12  Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
  13  Copyright (C) 2007 Larry Finger <Larry.Finger@lwfinger.net>
  14
  15
  16*/
  17
  18#include <net/dst.h>
  19
  20#include "xmit.h"
  21#include "phy.h"
  22#include "dma.h"
  23#include "pio.h"
  24
  25
  26/* Extract the bitrate out of a CCK PLCP header. */
  27static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
  28{
  29        switch (plcp->raw[0]) {
  30        case 0x0A:
  31                return 0;
  32        case 0x14:
  33                return 1;
  34        case 0x37:
  35                return 2;
  36        case 0x6E:
  37                return 3;
  38        }
  39        B43legacy_BUG_ON(1);
  40        return -1;
  41}
  42
  43/* Extract the bitrate out of an OFDM PLCP header. */
  44static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
  45                                              bool aphy)
  46{
  47        int base = aphy ? 0 : 4;
  48
  49        switch (plcp->raw[0] & 0xF) {
  50        case 0xB:
  51                return base + 0;
  52        case 0xF:
  53                return base + 1;
  54        case 0xA:
  55                return base + 2;
  56        case 0xE:
  57                return base + 3;
  58        case 0x9:
  59                return base + 4;
  60        case 0xD:
  61                return base + 5;
  62        case 0x8:
  63                return base + 6;
  64        case 0xC:
  65                return base + 7;
  66        }
  67        B43legacy_BUG_ON(1);
  68        return -1;
  69}
  70
  71u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
  72{
  73        switch (bitrate) {
  74        case B43legacy_CCK_RATE_1MB:
  75                return 0x0A;
  76        case B43legacy_CCK_RATE_2MB:
  77                return 0x14;
  78        case B43legacy_CCK_RATE_5MB:
  79                return 0x37;
  80        case B43legacy_CCK_RATE_11MB:
  81                return 0x6E;
  82        }
  83        B43legacy_BUG_ON(1);
  84        return 0;
  85}
  86
  87u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
  88{
  89        switch (bitrate) {
  90        case B43legacy_OFDM_RATE_6MB:
  91                return 0xB;
  92        case B43legacy_OFDM_RATE_9MB:
  93                return 0xF;
  94        case B43legacy_OFDM_RATE_12MB:
  95                return 0xA;
  96        case B43legacy_OFDM_RATE_18MB:
  97                return 0xE;
  98        case B43legacy_OFDM_RATE_24MB:
  99                return 0x9;
 100        case B43legacy_OFDM_RATE_36MB:
 101                return 0xD;
 102        case B43legacy_OFDM_RATE_48MB:
 103                return 0x8;
 104        case B43legacy_OFDM_RATE_54MB:
 105                return 0xC;
 106        }
 107        B43legacy_BUG_ON(1);
 108        return 0;
 109}
 110
 111void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
 112                                 const u16 octets, const u8 bitrate)
 113{
 114        __le32 *data = &(plcp->data);
 115        __u8 *raw = plcp->raw;
 116
 117        if (b43legacy_is_ofdm_rate(bitrate)) {
 118                u16 d;
 119
 120                d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
 121                B43legacy_WARN_ON(octets & 0xF000);
 122                d |= (octets << 5);
 123                *data = cpu_to_le32(d);
 124        } else {
 125                u32 plen;
 126
 127                plen = octets * 16 / bitrate;
 128                if ((octets * 16 % bitrate) > 0) {
 129                        plen++;
 130                        if ((bitrate == B43legacy_CCK_RATE_11MB)
 131                            && ((octets * 8 % 11) < 4))
 132                                raw[1] = 0x84;
 133                        else
 134                                raw[1] = 0x04;
 135                } else
 136                        raw[1] = 0x04;
 137                *data |= cpu_to_le32(plen << 16);
 138                raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
 139        }
 140}
 141
 142static u8 b43legacy_calc_fallback_rate(u8 bitrate)
 143{
 144        switch (bitrate) {
 145        case B43legacy_CCK_RATE_1MB:
 146                return B43legacy_CCK_RATE_1MB;
 147        case B43legacy_CCK_RATE_2MB:
 148                return B43legacy_CCK_RATE_1MB;
 149        case B43legacy_CCK_RATE_5MB:
 150                return B43legacy_CCK_RATE_2MB;
 151        case B43legacy_CCK_RATE_11MB:
 152                return B43legacy_CCK_RATE_5MB;
 153        case B43legacy_OFDM_RATE_6MB:
 154                return B43legacy_CCK_RATE_5MB;
 155        case B43legacy_OFDM_RATE_9MB:
 156                return B43legacy_OFDM_RATE_6MB;
 157        case B43legacy_OFDM_RATE_12MB:
 158                return B43legacy_OFDM_RATE_9MB;
 159        case B43legacy_OFDM_RATE_18MB:
 160                return B43legacy_OFDM_RATE_12MB;
 161        case B43legacy_OFDM_RATE_24MB:
 162                return B43legacy_OFDM_RATE_18MB;
 163        case B43legacy_OFDM_RATE_36MB:
 164                return B43legacy_OFDM_RATE_24MB;
 165        case B43legacy_OFDM_RATE_48MB:
 166                return B43legacy_OFDM_RATE_36MB;
 167        case B43legacy_OFDM_RATE_54MB:
 168                return B43legacy_OFDM_RATE_48MB;
 169        }
 170        B43legacy_BUG_ON(1);
 171        return 0;
 172}
 173
 174static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
 175                               struct b43legacy_txhdr_fw3 *txhdr,
 176                               const unsigned char *fragment_data,
 177                               unsigned int fragment_len,
 178                               struct ieee80211_tx_info *info,
 179                               u16 cookie)
 180{
 181        const struct ieee80211_hdr *wlhdr;
 182        int use_encryption = !!info->control.hw_key;
 183        u8 rate;
 184        struct ieee80211_rate *rate_fb;
 185        int rate_ofdm;
 186        int rate_fb_ofdm;
 187        unsigned int plcp_fragment_len;
 188        u32 mac_ctl = 0;
 189        u16 phy_ctl = 0;
 190        struct ieee80211_rate *tx_rate;
 191        struct ieee80211_tx_rate *rates;
 192
 193        wlhdr = (const struct ieee80211_hdr *)fragment_data;
 194
 195        memset(txhdr, 0, sizeof(*txhdr));
 196
 197        tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);
 198
 199        rate = tx_rate->hw_value;
 200        rate_ofdm = b43legacy_is_ofdm_rate(rate);
 201        rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
 202        rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
 203
 204        txhdr->mac_frame_ctl = wlhdr->frame_control;
 205        memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN);
 206
 207        /* Calculate duration for fallback rate */
 208        if ((rate_fb->hw_value == rate) ||
 209            (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
 210            (wlhdr->duration_id == cpu_to_le16(0))) {
 211                /* If the fallback rate equals the normal rate or the
 212                 * dur_id field contains an AID, CFP magic or 0,
 213                 * use the original dur_id field. */
 214                txhdr->dur_fb = wlhdr->duration_id;
 215        } else {
 216                txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
 217                                                         info->control.vif,
 218                                                         info->band,
 219                                                         fragment_len,
 220                                                         rate_fb);
 221        }
 222
 223        plcp_fragment_len = fragment_len + FCS_LEN;
 224        if (use_encryption) {
 225                u8 key_idx = info->control.hw_key->hw_key_idx;
 226                struct b43legacy_key *key;
 227                int wlhdr_len;
 228                size_t iv_len;
 229
 230                B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
 231                key = &(dev->key[key_idx]);
 232
 233                if (key->enabled) {
 234                        /* Hardware appends ICV. */
 235                        plcp_fragment_len += info->control.hw_key->icv_len;
 236
 237                        key_idx = b43legacy_kidx_to_fw(dev, key_idx);
 238                        mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
 239                                   B43legacy_TX4_MAC_KEYIDX;
 240                        mac_ctl |= (key->algorithm <<
 241                                   B43legacy_TX4_MAC_KEYALG_SHIFT) &
 242                                   B43legacy_TX4_MAC_KEYALG;
 243                        wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
 244                        iv_len = min_t(size_t, info->control.hw_key->iv_len,
 245                                     ARRAY_SIZE(txhdr->iv));
 246                        memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
 247                } else {
 248                        /* This key is invalid. This might only happen
 249                         * in a short timeframe after machine resume before
 250                         * we were able to reconfigure keys.
 251                         * Drop this packet completely. Do not transmit it
 252                         * unencrypted to avoid leaking information. */
 253                        return -ENOKEY;
 254                }
 255        }
 256        b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 257                                    (&txhdr->plcp), plcp_fragment_len,
 258                                    rate);
 259        b43legacy_generate_plcp_hdr(&txhdr->plcp_fb, plcp_fragment_len,
 260                                    rate_fb->hw_value);
 261
 262        /* PHY TX Control word */
 263        if (rate_ofdm)
 264                phy_ctl |= B43legacy_TX4_PHY_ENC_OFDM;
 265        if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 266                phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
 267        phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
 268
 269        /* MAC control */
 270        rates = info->control.rates;
 271        if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 272                mac_ctl |= B43legacy_TX4_MAC_ACK;
 273        if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 274                mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
 275        if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 276                mac_ctl |= B43legacy_TX4_MAC_STMSDU;
 277        if (rate_fb_ofdm)
 278                mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
 279
 280        /* Overwrite rates[0].count to make the retry calculation
 281         * in the tx status easier. need the actual retry limit to
 282         * detect whether the fallback rate was used.
 283         */
 284        if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 285            (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
 286                rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
 287                mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
 288        } else {
 289                rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
 290        }
 291
 292        /* Generate the RTS or CTS-to-self frame */
 293        if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 294            (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
 295                unsigned int len;
 296                struct ieee80211_hdr *hdr;
 297                int rts_rate;
 298                int rts_rate_fb;
 299                int rts_rate_fb_ofdm;
 300
 301                rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
 302                rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
 303                rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
 304                if (rts_rate_fb_ofdm)
 305                        mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
 306
 307                if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 308                        ieee80211_ctstoself_get(dev->wl->hw,
 309                                                info->control.vif,
 310                                                fragment_data,
 311                                                fragment_len, info,
 312                                                (struct ieee80211_cts *)
 313                                                (txhdr->rts_frame));
 314                        mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
 315                        len = sizeof(struct ieee80211_cts);
 316                } else {
 317                        ieee80211_rts_get(dev->wl->hw,
 318                                          info->control.vif,
 319                                          fragment_data, fragment_len, info,
 320                                          (struct ieee80211_rts *)
 321                                          (txhdr->rts_frame));
 322                        mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
 323                        len = sizeof(struct ieee80211_rts);
 324                }
 325                len += FCS_LEN;
 326                b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
 327                                            (&txhdr->rts_plcp),
 328                                            len, rts_rate);
 329                b43legacy_generate_plcp_hdr(&txhdr->rts_plcp_fb,
 330                                            len, rts_rate_fb);
 331                hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
 332                txhdr->rts_dur_fb = hdr->duration_id;
 333        }
 334
 335        /* Magic cookie */
 336        txhdr->cookie = cpu_to_le16(cookie);
 337
 338        /* Apply the bitfields */
 339        txhdr->mac_ctl = cpu_to_le32(mac_ctl);
 340        txhdr->phy_ctl = cpu_to_le16(phy_ctl);
 341
 342        return 0;
 343}
 344
 345int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
 346                              u8 *txhdr,
 347                              const unsigned char *fragment_data,
 348                              unsigned int fragment_len,
 349                              struct ieee80211_tx_info *info,
 350                              u16 cookie)
 351{
 352        return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
 353                           fragment_data, fragment_len,
 354                           info, cookie);
 355}
 356
 357static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
 358                                     u8 in_rssi, int ofdm,
 359                                     int adjust_2053, int adjust_2050)
 360{
 361        struct b43legacy_phy *phy = &dev->phy;
 362        s32 tmp;
 363
 364        switch (phy->radio_ver) {
 365        case 0x2050:
 366                if (ofdm) {
 367                        tmp = in_rssi;
 368                        if (tmp > 127)
 369                                tmp -= 256;
 370                        tmp *= 73;
 371                        tmp /= 64;
 372                        if (adjust_2050)
 373                                tmp += 25;
 374                        else
 375                                tmp -= 3;
 376                } else {
 377                        if (dev->dev->bus->sprom.boardflags_lo
 378                            & B43legacy_BFL_RSSI) {
 379                                if (in_rssi > 63)
 380                                        in_rssi = 63;
 381                                tmp = phy->nrssi_lt[in_rssi];
 382                                tmp = 31 - tmp;
 383                                tmp *= -131;
 384                                tmp /= 128;
 385                                tmp -= 57;
 386                        } else {
 387                                tmp = in_rssi;
 388                                tmp = 31 - tmp;
 389                                tmp *= -149;
 390                                tmp /= 128;
 391                                tmp -= 68;
 392                        }
 393                        if (phy->type == B43legacy_PHYTYPE_G &&
 394                            adjust_2050)
 395                                tmp += 25;
 396                }
 397                break;
 398        case 0x2060:
 399                if (in_rssi > 127)
 400                        tmp = in_rssi - 256;
 401                else
 402                        tmp = in_rssi;
 403                break;
 404        default:
 405                tmp = in_rssi;
 406                tmp -= 11;
 407                tmp *= 103;
 408                tmp /= 64;
 409                if (adjust_2053)
 410                        tmp -= 109;
 411                else
 412                        tmp -= 83;
 413        }
 414
 415        return (s8)tmp;
 416}
 417
 418void b43legacy_rx(struct b43legacy_wldev *dev,
 419                  struct sk_buff *skb,
 420                  const void *_rxhdr)
 421{
 422        struct ieee80211_rx_status status;
 423        struct b43legacy_plcp_hdr6 *plcp;
 424        struct ieee80211_hdr *wlhdr;
 425        const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
 426        __le16 fctl;
 427        u16 phystat0;
 428        u16 phystat3;
 429        u16 chanstat;
 430        u16 mactime;
 431        u32 macstat;
 432        u16 chanid;
 433        u8 jssi;
 434        int padding;
 435
 436        memset(&status, 0, sizeof(status));
 437
 438        /* Get metadata about the frame from the header. */
 439        phystat0 = le16_to_cpu(rxhdr->phy_status0);
 440        phystat3 = le16_to_cpu(rxhdr->phy_status3);
 441        jssi = rxhdr->jssi;
 442        macstat = le16_to_cpu(rxhdr->mac_status);
 443        mactime = le16_to_cpu(rxhdr->mac_time);
 444        chanstat = le16_to_cpu(rxhdr->channel);
 445
 446        if (macstat & B43legacy_RX_MAC_FCSERR)
 447                dev->wl->ieee_stats.dot11FCSErrorCount++;
 448
 449        /* Skip PLCP and padding */
 450        padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
 451        if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
 452            padding))) {
 453                b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
 454                goto drop;
 455        }
 456        plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
 457        skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
 458        /* The skb contains the Wireless Header + payload data now */
 459        if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
 460                b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
 461                goto drop;
 462        }
 463        wlhdr = (struct ieee80211_hdr *)(skb->data);
 464        fctl = wlhdr->frame_control;
 465
 466        if ((macstat & B43legacy_RX_MAC_DEC) &&
 467            !(macstat & B43legacy_RX_MAC_DECERR)) {
 468                unsigned int keyidx;
 469                int wlhdr_len;
 470                int iv_len;
 471                int icv_len;
 472
 473                keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
 474                          >> B43legacy_RX_MAC_KEYIDX_SHIFT);
 475                /* We must adjust the key index here. We want the "physical"
 476                 * key index, but the ucode passed it slightly different.
 477                 */
 478                keyidx = b43legacy_kidx_to_raw(dev, keyidx);
 479                B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
 480
 481                if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
 482                        /* Remove PROTECTED flag to mark it as decrypted. */
 483                        B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
 484                        fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 485                        wlhdr->frame_control = fctl;
 486
 487                        wlhdr_len = ieee80211_hdrlen(fctl);
 488                        if (unlikely(skb->len < (wlhdr_len + 3))) {
 489                                b43legacydbg(dev->wl, "RX: Packet size"
 490                                             " underrun3\n");
 491                                goto drop;
 492                        }
 493                        if (skb->data[wlhdr_len + 3] & (1 << 5)) {
 494                                /* The Ext-IV Bit is set in the "KeyID"
 495                                 * octet of the IV.
 496                                 */
 497                                iv_len = 8;
 498                                icv_len = 8;
 499                        } else {
 500                                iv_len = 4;
 501                                icv_len = 4;
 502                        }
 503                        if (unlikely(skb->len < (wlhdr_len + iv_len +
 504                            icv_len))) {
 505                                b43legacydbg(dev->wl, "RX: Packet size"
 506                                             " underrun4\n");
 507                                goto drop;
 508                        }
 509                        /* Remove the IV */
 510                        memmove(skb->data + iv_len, skb->data, wlhdr_len);
 511                        skb_pull(skb, iv_len);
 512                        /* Remove the ICV */
 513                        skb_trim(skb, skb->len - icv_len);
 514
 515                        status.flag |= RX_FLAG_DECRYPTED;
 516                }
 517        }
 518
 519        status.signal = b43legacy_rssi_postprocess(dev, jssi,
 520                                      (phystat0 & B43legacy_RX_PHYST0_OFDM),
 521                                      (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
 522                                      (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
 523        /* change to support A PHY */
 524        if (phystat0 & B43legacy_RX_PHYST0_OFDM)
 525                status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
 526        else
 527                status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
 528        status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
 529
 530        /*
 531         * All frames on monitor interfaces and beacons always need a full
 532         * 64-bit timestamp. Monitor interfaces need it for diagnostic
 533         * purposes and beacons for IBSS merging.
 534         * This code assumes we get to process the packet within 16 bits
 535         * of timestamp, i.e. about 65 milliseconds after the PHY received
 536         * the first symbol.
 537         */
 538        if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
 539                u16 low_mactime_now;
 540
 541                b43legacy_tsf_read(dev, &status.mactime);
 542                low_mactime_now = status.mactime;
 543                status.mactime = status.mactime & ~0xFFFFULL;
 544                status.mactime += mactime;
 545                if (low_mactime_now <= mactime)
 546                        status.mactime -= 0x10000;
 547                status.flag |= RX_FLAG_MACTIME_START;
 548        }
 549
 550        chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
 551                  B43legacy_RX_CHAN_ID_SHIFT;
 552        switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
 553        case B43legacy_PHYTYPE_B:
 554        case B43legacy_PHYTYPE_G:
 555                status.band = NL80211_BAND_2GHZ;
 556                status.freq = chanid + 2400;
 557                break;
 558        default:
 559                b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
 560                       chanstat);
 561                goto drop;
 562        }
 563
 564        memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
 565        ieee80211_rx_irqsafe(dev->wl->hw, skb);
 566
 567        return;
 568drop:
 569        b43legacydbg(dev->wl, "RX: Packet dropped\n");
 570        dev_kfree_skb_any(skb);
 571}
 572
 573void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
 574                             const struct b43legacy_txstatus *status)
 575{
 576        b43legacy_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 (b43legacy_using_pio(dev))
 592                b43legacy_pio_handle_txstatus(dev, status);
 593        else
 594                b43legacy_dma_handle_txstatus(dev, status);
 595}
 596
 597/* Handle TX status report as received through DMA/PIO queues */
 598void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
 599                                 const struct b43legacy_hwtxstatus *hw)
 600{
 601        struct b43legacy_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 << 1;
 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        b43legacy_handle_txstatus(dev, &status);
 618}
 619
 620/* Stop any TX operation on the device (suspend the hardware queues) */
 621void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
 622{
 623        if (b43legacy_using_pio(dev))
 624                b43legacy_pio_freeze_txqueues(dev);
 625        else
 626                b43legacy_dma_tx_suspend(dev);
 627}
 628
 629/* Resume any TX operation on the device (resume the hardware queues) */
 630void b43legacy_tx_resume(struct b43legacy_wldev *dev)
 631{
 632        if (b43legacy_using_pio(dev))
 633                b43legacy_pio_thaw_txqueues(dev);
 634        else
 635                b43legacy_dma_tx_resume(dev);
 636}
 637
 638/* Initialize the QoS parameters */
 639void b43legacy_qos_init(struct b43legacy_wldev *dev)
 640{
 641        /* FIXME: This function must probably be called from the mac80211
 642         * config callback. */
 643return;
 644
 645        b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
 646        /* FIXME kill magic */
 647        b43legacy_write16(dev, 0x688,
 648                          b43legacy_read16(dev, 0x688) | 0x4);
 649
 650
 651        /*TODO: We might need some stack support here to get the values. */
 652}
 653
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