drivers/net/wireless/iwlwifi/iwl-rx.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/etherdevice.h>
  31 #include <linux/slab.h>
  32 #include <linux/sched.h>
  33 #include <net/mac80211.h>
  34 #include <asm/unaligned.h>
  35 #include "iwl-eeprom.h"
  36 #include "iwl-dev.h"
  37 #include "iwl-core.h"
  38 #include "iwl-sta.h"
  39 #include "iwl-io.h"
  40 #include "iwl-helpers.h"
  41 #include "iwl-agn-calib.h"
  42 #include "iwl-agn.h"
  43 #include "iwl-shared.h"
  44
  45
  46 /******************************************************************************
  47  *
  48  * Generic RX handler implementations
  49  *
  50  ******************************************************************************/
  51
  52 static void iwl_rx_reply_error(struct iwl_priv *priv,
  53                                struct iwl_rx_mem_buffer *rxb)
  54 {
  55         struct iwl_rx_packet *pkt = rxb_addr(rxb);
  56
  57         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
  58                 "seq 0x%04X ser 0x%08X\n",
  59                 le32_to_cpu(pkt->u.err_resp.error_type),
  60                 get_cmd_string(pkt->u.err_resp.cmd_id),
  61                 pkt->u.err_resp.cmd_id,
  62                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
  63                 le32_to_cpu(pkt->u.err_resp.error_info));
  64 }
  65
  66 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
  67 {
  68         struct iwl_rx_packet *pkt = rxb_addr(rxb);
  69         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
  70         /*
  71          * MULTI-FIXME
  72          * See iwl_mac_channel_switch.
  73          */
  74         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
  75         struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
  76
  77         if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
  78                 return;
  79
  80         if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
  81                 rxon->channel = csa->channel;
  82                 ctx->staging.channel = csa->channel;
  83                 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
  84                               le16_to_cpu(csa->channel));
  85                 iwl_chswitch_done(priv, true);
  86         } else {
  87                 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
  88                         le16_to_cpu(csa->channel));
  89                 iwl_chswitch_done(priv, false);
  90         }
  91 }
  92
  93
  94 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
  95                                           struct iwl_rx_mem_buffer *rxb)
  96 {
  97         struct iwl_rx_packet *pkt = rxb_addr(rxb);
  98         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
  99
 100         if (!report->state) {
 101                 IWL_DEBUG_11H(priv,
 102                         "Spectrum Measure Notification: Start\n");
 103                 return;
 104         }
 105
 106         memcpy(&priv->measure_report, report, sizeof(*report));
 107         priv->measurement_status |= MEASUREMENT_READY;
 108 }
 109
 110 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
 111                                   struct iwl_rx_mem_buffer *rxb)
 112 {
 113 #ifdef CONFIG_IWLWIFI_DEBUG
 114         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 115         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
 116         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
 117                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
 118 #endif
 119 }
 120
 121 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
 122                                              struct iwl_rx_mem_buffer *rxb)
 123 {
 124         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 125         u32 __maybe_unused len =
 126                 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 127         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
 128                         "notification for %s:\n", len,
 129                         get_cmd_string(pkt->hdr.cmd));
 130         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
 131 }
 132
 133 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 134                                 struct iwl_rx_mem_buffer *rxb)
 135 {
 136         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 137         struct iwlagn_beacon_notif *beacon = (void *)pkt->u.raw;
 138 #ifdef CONFIG_IWLWIFI_DEBUG
 139         u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
 140         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 141
 142         IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
 143                 "tsf:0x%.8x%.8x rate:%d\n",
 144                 status & TX_STATUS_MSK,
 145                 beacon->beacon_notify_hdr.failure_frame,
 146                 le32_to_cpu(beacon->ibss_mgr_status),
 147                 le32_to_cpu(beacon->high_tsf),
 148                 le32_to_cpu(beacon->low_tsf), rate);
 149 #endif
 150
 151         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 152
 153         if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 154                 queue_work(priv->shrd->workqueue, &priv->beacon_update);
 155 }
 156
 157 /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
 158 #define ACK_CNT_RATIO (50)
 159 #define BA_TIMEOUT_CNT (5)
 160 #define BA_TIMEOUT_MAX (16)
 161
 162 /**
 163  * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
 164  *
 165  * When the ACK count ratio is low and aggregated BA timeout retries exceeding
 166  * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
 167  * operation state.
 168  */
 169 static bool iwl_good_ack_health(struct iwl_priv *priv,
 170                                 struct statistics_tx *cur)
 171 {
 172         int actual_delta, expected_delta, ba_timeout_delta;
 173         struct statistics_tx *old;
 174
 175         if (priv->agg_tids_count)
 176                 return true;
 177
 178         old = &priv->statistics.tx;
 179
 180         actual_delta = le32_to_cpu(cur->actual_ack_cnt) -
 181                        le32_to_cpu(old->actual_ack_cnt);
 182         expected_delta = le32_to_cpu(cur->expected_ack_cnt) -
 183                          le32_to_cpu(old->expected_ack_cnt);
 184
 185         /* Values should not be negative, but we do not trust the firmware */
 186         if (actual_delta <= 0 || expected_delta <= 0)
 187                 return true;
 188
 189         ba_timeout_delta = le32_to_cpu(cur->agg.ba_timeout) -
 190                            le32_to_cpu(old->agg.ba_timeout);
 191
 192         if ((actual_delta * 100 / expected_delta) < ACK_CNT_RATIO &&
 193             ba_timeout_delta > BA_TIMEOUT_CNT) {
 194                 IWL_DEBUG_RADIO(priv, "deltas: actual %d expected %d ba_timeout %d\n",
 195                                 actual_delta, expected_delta, ba_timeout_delta);
 196
 197 #ifdef CONFIG_IWLWIFI_DEBUGFS
 198                 /*
 199                  * This is ifdef'ed on DEBUGFS because otherwise the
 200                  * statistics aren't available. If DEBUGFS is set but
 201                  * DEBUG is not, these will just compile out.
 202                  */
 203                 IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta %d\n",
 204                                 priv->delta_stats.tx.rx_detected_cnt);
 205                 IWL_DEBUG_RADIO(priv,
 206                                 "ack_or_ba_timeout_collision delta %d\n",
 207                                 priv->delta_stats.tx.ack_or_ba_timeout_collision);
 208 #endif
 209
 210                 if (ba_timeout_delta >= BA_TIMEOUT_MAX)
 211                         return false;
 212         }
 213
 214         return true;
 215 }
 216
 217 /**
 218  * iwl_good_plcp_health - checks for plcp error.
 219  *
 220  * When the plcp error is exceeding the thresholds, reset the radio
 221  * to improve the throughput.
 222  */
 223 static bool iwl_good_plcp_health(struct iwl_priv *priv,
 224                                  struct statistics_rx_phy *cur_ofdm,
 225                                  struct statistics_rx_ht_phy *cur_ofdm_ht,
 226                                  unsigned int msecs)
 227 {
 228         int delta;
 229         int threshold = priv->cfg->base_params->plcp_delta_threshold;
 230
 231         if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
 232                 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
 233                 return true;
 234         }
 235
 236         delta = le32_to_cpu(cur_ofdm->plcp_err) -
 237                 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
 238                 le32_to_cpu(cur_ofdm_ht->plcp_err) -
 239                 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
 240
 241         /* Can be negative if firmware reset statistics */
 242         if (delta <= 0)
 243                 return true;
 244
 245         if ((delta * 100 / msecs) > threshold) {
 246                 IWL_DEBUG_RADIO(priv,
 247                                 "plcp health threshold %u delta %d msecs %u\n",
 248                                 threshold, delta, msecs);
 249                 return false;
 250         }
 251
 252         return true;
 253 }
 254
 255 static void iwl_recover_from_statistics(struct iwl_priv *priv,
 256                                         struct statistics_rx_phy *cur_ofdm,
 257                                         struct statistics_rx_ht_phy *cur_ofdm_ht,
 258                                         struct statistics_tx *tx,
 259                                         unsigned long stamp)
 260 {
 261         unsigned int msecs;
 262
 263         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 264                 return;
 265
 266         msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
 267
 268         /* Only gather statistics and update time stamp when not associated */
 269         if (!iwl_is_any_associated(priv))
 270                 return;
 271
 272         /* Do not check/recover when do not have enough statistics data */
 273         if (msecs < 99)
 274                 return;
 275
 276         if (iwlagn_mod_params.ack_check && !iwl_good_ack_health(priv, tx)) {
 277                 IWL_ERR(priv, "low ack count detected, restart firmware\n");
 278                 if (!iwl_force_reset(priv, IWL_FW_RESET, false))
 279                         return;
 280         }
 281
 282         if (iwlagn_mod_params.plcp_check &&
 283             !iwl_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
 284                 iwl_force_reset(priv, IWL_RF_RESET, false);
 285 }
 286
 287 /* Calculate noise level, based on measurements during network silence just
 288  *   before arriving beacon.  This measurement can be done only if we know
 289  *   exactly when to expect beacons, therefore only when we're associated. */
 290 static void iwl_rx_calc_noise(struct iwl_priv *priv)
 291 {
 292         struct statistics_rx_non_phy *rx_info;
 293         int num_active_rx = 0;
 294         int total_silence = 0;
 295         int bcn_silence_a, bcn_silence_b, bcn_silence_c;
 296         int last_rx_noise;
 297
 298         rx_info = &priv->statistics.rx_non_phy;
 299
 300         bcn_silence_a =
 301                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
 302         bcn_silence_b =
 303                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
 304         bcn_silence_c =
 305                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
 306
 307         if (bcn_silence_a) {
 308                 total_silence += bcn_silence_a;
 309                 num_active_rx++;
 310         }
 311         if (bcn_silence_b) {
 312                 total_silence += bcn_silence_b;
 313                 num_active_rx++;
 314         }
 315         if (bcn_silence_c) {
 316                 total_silence += bcn_silence_c;
 317                 num_active_rx++;
 318         }
 319
 320         /* Average among active antennas */
 321         if (num_active_rx)
 322                 last_rx_noise = (total_silence / num_active_rx) - 107;
 323         else
 324                 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 325
 326         IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
 327                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
 328                         last_rx_noise);
 329 }
 330
 331 #ifdef CONFIG_IWLWIFI_DEBUGFS
 332 /*
 333  *  based on the assumption of all statistics counter are in DWORD
 334  *  FIXME: This function is for debugging, do not deal with
 335  *  the case of counters roll-over.
 336  */
 337 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
 338                         __le32 *max_delta, __le32 *accum, int size)
 339 {
 340         int i;
 341
 342         for (i = 0;
 343              i < size / sizeof(__le32);
 344              i++, prev++, cur++, delta++, max_delta++, accum++) {
 345                 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
 346                         *delta = cpu_to_le32(
 347                                 le32_to_cpu(*cur) - le32_to_cpu(*prev));
 348                         le32_add_cpu(accum, le32_to_cpu(*delta));
 349                         if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
 350                                 *max_delta = *delta;
 351                 }
 352         }
 353 }
 354
 355 static void
 356 iwl_accumulative_statistics(struct iwl_priv *priv,
 357                             struct statistics_general_common *common,
 358                             struct statistics_rx_non_phy *rx_non_phy,
 359                             struct statistics_rx_phy *rx_ofdm,
 360                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 361                             struct statistics_rx_phy *rx_cck,
 362                             struct statistics_tx *tx,
 363                             struct statistics_bt_activity *bt_activity)
 364 {
 365 #define ACCUM(_name)    \
 366         accum_stats((__le32 *)&priv->statistics._name,          \
 367                     (__le32 *)_name,                            \
 368                     (__le32 *)&priv->delta_stats._name,         \
 369                     (__le32 *)&priv->max_delta_stats._name,     \
 370                     (__le32 *)&priv->accum_stats._name,         \
 371                     sizeof(*_name));
 372
 373         ACCUM(common);
 374         ACCUM(rx_non_phy);
 375         ACCUM(rx_ofdm);
 376         ACCUM(rx_ofdm_ht);
 377         ACCUM(rx_cck);
 378         ACCUM(tx);
 379         if (bt_activity)
 380                 ACCUM(bt_activity);
 381 #undef ACCUM
 382 }
 383 #else
 384 static inline void
 385 iwl_accumulative_statistics(struct iwl_priv *priv,
 386                             struct statistics_general_common *common,
 387                             struct statistics_rx_non_phy *rx_non_phy,
 388                             struct statistics_rx_phy *rx_ofdm,
 389                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 390                             struct statistics_rx_phy *rx_cck,
 391                             struct statistics_tx *tx,
 392                             struct statistics_bt_activity *bt_activity)
 393 {
 394 }
 395 #endif
 396
 397 static void iwl_rx_statistics(struct iwl_priv *priv,
 398                               struct iwl_rx_mem_buffer *rxb)
 399 {
 400         unsigned long stamp = jiffies;
 401         const int reg_recalib_period = 60;
 402         int change;
 403         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 404         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 405         __le32 *flag;
 406         struct statistics_general_common *common;
 407         struct statistics_rx_non_phy *rx_non_phy;
 408         struct statistics_rx_phy *rx_ofdm;
 409         struct statistics_rx_ht_phy *rx_ofdm_ht;
 410         struct statistics_rx_phy *rx_cck;
 411         struct statistics_tx *tx;
 412         struct statistics_bt_activity *bt_activity;
 413
 414         len -= sizeof(struct iwl_cmd_header); /* skip header */
 415
 416         IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
 417                      len);
 418
 419         if (len == sizeof(struct iwl_bt_notif_statistics)) {
 420                 struct iwl_bt_notif_statistics *stats;
 421                 stats = &pkt->u.stats_bt;
 422                 flag = &stats->flag;
 423                 common = &stats->general.common;
 424                 rx_non_phy = &stats->rx.general.common;
 425                 rx_ofdm = &stats->rx.ofdm;
 426                 rx_ofdm_ht = &stats->rx.ofdm_ht;
 427                 rx_cck = &stats->rx.cck;
 428                 tx = &stats->tx;
 429                 bt_activity = &stats->general.activity;
 430
 431 #ifdef CONFIG_IWLWIFI_DEBUGFS
 432                 /* handle this exception directly */
 433                 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
 434                 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
 435                              le32_to_cpu(stats->rx.general.num_bt_kills));
 436 #endif
 437         } else if (len == sizeof(struct iwl_notif_statistics)) {
 438                 struct iwl_notif_statistics *stats;
 439                 stats = &pkt->u.stats;
 440                 flag = &stats->flag;
 441                 common = &stats->general.common;
 442                 rx_non_phy = &stats->rx.general;
 443                 rx_ofdm = &stats->rx.ofdm;
 444                 rx_ofdm_ht = &stats->rx.ofdm_ht;
 445                 rx_cck = &stats->rx.cck;
 446                 tx = &stats->tx;
 447                 bt_activity = NULL;
 448         } else {
 449                 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
 450                           len, sizeof(struct iwl_bt_notif_statistics),
 451                           sizeof(struct iwl_notif_statistics));
 452                 return;
 453         }
 454
 455         change = common->temperature != priv->statistics.common.temperature ||
 456                  (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
 457                  (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
 458
 459         iwl_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
 460                                     rx_ofdm_ht, rx_cck, tx, bt_activity);
 461
 462         iwl_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
 463
 464         priv->statistics.flag = *flag;
 465         memcpy(&priv->statistics.common, common, sizeof(*common));
 466         memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
 467         memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
 468         memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
 469         memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
 470         memcpy(&priv->statistics.tx, tx, sizeof(*tx));
 471 #ifdef CONFIG_IWLWIFI_DEBUGFS
 472         if (bt_activity)
 473                 memcpy(&priv->statistics.bt_activity, bt_activity,
 474                         sizeof(*bt_activity));
 475 #endif
 476
 477         priv->rx_statistics_jiffies = stamp;
 478
 479         set_bit(STATUS_STATISTICS, &priv->shrd->status);
 480
 481         /* Reschedule the statistics timer to occur in
 482          * reg_recalib_period seconds to ensure we get a
 483          * thermal update even if the uCode doesn't give
 484          * us one */
 485         mod_timer(&priv->statistics_periodic, jiffies +
 486                   msecs_to_jiffies(reg_recalib_period * 1000));
 487
 488         if (unlikely(!test_bit(STATUS_SCANNING, &priv->shrd->status)) &&
 489             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
 490                 iwl_rx_calc_noise(priv);
 491                 queue_work(priv->shrd->workqueue, &priv->run_time_calib_work);
 492         }
 493         if (priv->cfg->lib->temperature && change)
 494                 priv->cfg->lib->temperature(priv);
 495 }
 496
 497 static void iwl_rx_reply_statistics(struct iwl_priv *priv,
 498                                     struct iwl_rx_mem_buffer *rxb)
 499 {
 500         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 501
 502         if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
 503 #ifdef CONFIG_IWLWIFI_DEBUGFS
 504                 memset(&priv->accum_stats, 0,
 505                         sizeof(priv->accum_stats));
 506                 memset(&priv->delta_stats, 0,
 507                         sizeof(priv->delta_stats));
 508                 memset(&priv->max_delta_stats, 0,
 509                         sizeof(priv->max_delta_stats));
 510 #endif
 511                 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
 512         }
 513         iwl_rx_statistics(priv, rxb);
 514 }
 515
 516 /* Handle notification from uCode that card's power state is changing
 517  * due to software, hardware, or critical temperature RFKILL */
 518 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 519                                     struct iwl_rx_mem_buffer *rxb)
 520 {
 521         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 522         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 523         unsigned long status = priv->shrd->status;
 524
 525         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
 526                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 527                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
 528                           (flags & CT_CARD_DISABLED) ?
 529                           "Reached" : "Not reached");
 530
 531         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 532                      CT_CARD_DISABLED)) {
 533
 534                 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
 535                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 536
 537                 iwl_write_direct32(bus(priv), HBUS_TARG_MBX_C,
 538                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 539
 540                 if (!(flags & RXON_CARD_DISABLED)) {
 541                         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
 542                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 543                         iwl_write_direct32(bus(priv), HBUS_TARG_MBX_C,
 544                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 545                 }
 546                 if (flags & CT_CARD_DISABLED)
 547                         iwl_tt_enter_ct_kill(priv);
 548         }
 549         if (!(flags & CT_CARD_DISABLED))
 550                 iwl_tt_exit_ct_kill(priv);
 551
 552         if (flags & HW_CARD_DISABLED)
 553                 set_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
 554         else
 555                 clear_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
 556
 557
 558         if (!(flags & RXON_CARD_DISABLED))
 559                 iwl_scan_cancel(priv);
 560
 561         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 562              test_bit(STATUS_RF_KILL_HW, &priv->shrd->status)))
 563                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 564                         test_bit(STATUS_RF_KILL_HW, &priv->shrd->status));
 565         else
 566                 wake_up_interruptible(&priv->wait_command_queue);
 567 }
 568
 569 static void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
 570                                        struct iwl_rx_mem_buffer *rxb)
 571
 572 {
 573         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 574         struct iwl_missed_beacon_notif *missed_beacon;
 575
 576         missed_beacon = &pkt->u.missed_beacon;
 577         if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
 578             priv->missed_beacon_threshold) {
 579                 IWL_DEBUG_CALIB(priv,
 580                     "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
 581                     le32_to_cpu(missed_beacon->consecutive_missed_beacons),
 582                     le32_to_cpu(missed_beacon->total_missed_becons),
 583                     le32_to_cpu(missed_beacon->num_recvd_beacons),
 584                     le32_to_cpu(missed_beacon->num_expected_beacons));
 585                 if (!test_bit(STATUS_SCANNING, &priv->shrd->status))
 586                         iwl_init_sensitivity(priv);
 587         }
 588 }
 589
 590 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
 591  * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
 592 static void iwl_rx_reply_rx_phy(struct iwl_priv *priv,
 593                                 struct iwl_rx_mem_buffer *rxb)
 594 {
 595         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 596
 597         priv->last_phy_res_valid = true;
 598         memcpy(&priv->last_phy_res, pkt->u.raw,
 599                sizeof(struct iwl_rx_phy_res));
 600 }
 601
 602 /*
 603  * returns non-zero if packet should be dropped
 604  */
 605 static int iwl_set_decrypted_flag(struct iwl_priv *priv,
 606                                   struct ieee80211_hdr *hdr,
 607                                   u32 decrypt_res,
 608                                   struct ieee80211_rx_status *stats)
 609 {
 610         u16 fc = le16_to_cpu(hdr->frame_control);
 611
 612         /*
 613          * All contexts have the same setting here due to it being
 614          * a module parameter, so OK to check any context.
 615          */
 616         if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
 617                                                 RXON_FILTER_DIS_DECRYPT_MSK)
 618                 return 0;
 619
 620         if (!(fc & IEEE80211_FCTL_PROTECTED))
 621                 return 0;
 622
 623         IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
 624         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
 625         case RX_RES_STATUS_SEC_TYPE_TKIP:
 626                 /* The uCode has got a bad phase 1 Key, pushes the packet.
 627                  * Decryption will be done in SW. */
 628                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 629                     RX_RES_STATUS_BAD_KEY_TTAK)
 630                         break;
 631
 632         case RX_RES_STATUS_SEC_TYPE_WEP:
 633                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 634                     RX_RES_STATUS_BAD_ICV_MIC) {
 635                         /* bad ICV, the packet is destroyed since the
 636                          * decryption is inplace, drop it */
 637                         IWL_DEBUG_RX(priv, "Packet destroyed\n");
 638                         return -1;
 639                 }
 640         case RX_RES_STATUS_SEC_TYPE_CCMP:
 641                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 642                     RX_RES_STATUS_DECRYPT_OK) {
 643                         IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
 644                         stats->flag |= RX_FLAG_DECRYPTED;
 645                 }
 646                 break;
 647
 648         default:
 649                 break;
 650         }
 651         return 0;
 652 }
 653
 654 static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
 655                                         struct ieee80211_hdr *hdr,
 656                                         u16 len,
 657                                         u32 ampdu_status,
 658                                         struct iwl_rx_mem_buffer *rxb,
 659                                         struct ieee80211_rx_status *stats)
 660 {
 661         struct sk_buff *skb;
 662         __le16 fc = hdr->frame_control;
 663         struct iwl_rxon_context *ctx;
 664
 665         /* We only process data packets if the interface is open */
 666         if (unlikely(!priv->is_open)) {
 667                 IWL_DEBUG_DROP_LIMIT(priv,
 668                     "Dropping packet while interface is not open.\n");
 669                 return;
 670         }
 671
 672         /* In case of HW accelerated crypto and bad decryption, drop */
 673         if (!iwlagn_mod_params.sw_crypto &&
 674             iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats))
 675                 return;
 676
 677         skb = dev_alloc_skb(128);
 678         if (!skb) {
 679                 IWL_ERR(priv, "dev_alloc_skb failed\n");
 680                 return;
 681         }
 682
 683         skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
 684
 685         iwl_update_stats(priv, false, fc, len);
 686
 687         /*
 688         * Wake any queues that were stopped due to a passive channel tx
 689         * failure. This can happen because the regulatory enforcement in
 690         * the device waits for a beacon before allowing transmission,
 691         * sometimes even after already having transmitted frames for the
 692         * association because the new RXON may reset the information.
 693         */
 694         if (unlikely(ieee80211_is_beacon(fc))) {
 695                 for_each_context(priv, ctx) {
 696                         if (!ctx->last_tx_rejected)
 697                                 continue;
 698                         if (compare_ether_addr(hdr->addr3,
 699                                                ctx->active.bssid_addr))
 700                                 continue;
 701                         ctx->last_tx_rejected = false;
 702                         iwl_wake_any_queue(priv, ctx);
 703                 }
 704         }
 705
 706         memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
 707
 708         ieee80211_rx(priv->hw, skb);
 709         rxb->page = NULL;
 710 }
 711
 712 static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
 713 {
 714         u32 decrypt_out = 0;
 715
 716         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
 717                                         RX_RES_STATUS_STATION_FOUND)
 718                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
 719                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
 720
 721         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
 722
 723         /* packet was not encrypted */
 724         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 725                                         RX_RES_STATUS_SEC_TYPE_NONE)
 726                 return decrypt_out;
 727
 728         /* packet was encrypted with unknown alg */
 729         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 730                                         RX_RES_STATUS_SEC_TYPE_ERR)
 731                 return decrypt_out;
 732
 733         /* decryption was not done in HW */
 734         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
 735                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
 736                 return decrypt_out;
 737
 738         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
 739
 740         case RX_RES_STATUS_SEC_TYPE_CCMP:
 741                 /* alg is CCM: check MIC only */
 742                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
 743                         /* Bad MIC */
 744                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 745                 else
 746                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 747
 748                 break;
 749
 750         case RX_RES_STATUS_SEC_TYPE_TKIP:
 751                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
 752                         /* Bad TTAK */
 753                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
 754                         break;
 755                 }
 756                 /* fall through if TTAK OK */
 757         default:
 758                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
 759                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 760                 else
 761                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 762                 break;
 763         }
 764
 765         IWL_DEBUG_RX(priv, "decrypt_in:0x%x  decrypt_out = 0x%x\n",
 766                                         decrypt_in, decrypt_out);
 767
 768         return decrypt_out;
 769 }
 770
 771 /* Calc max signal level (dBm) among 3 possible receivers */
 772 static int iwlagn_calc_rssi(struct iwl_priv *priv,
 773                              struct iwl_rx_phy_res *rx_resp)
 774 {
 775         /* data from PHY/DSP regarding signal strength, etc.,
 776          *   contents are always there, not configurable by host
 777          */
 778         struct iwlagn_non_cfg_phy *ncphy =
 779                 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
 780         u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
 781         u8 agc;
 782
 783         val  = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
 784         agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
 785
 786         /* Find max rssi among 3 possible receivers.
 787          * These values are measured by the digital signal processor (DSP).
 788          * They should stay fairly constant even as the signal strength varies,
 789          *   if the radio's automatic gain control (AGC) is working right.
 790          * AGC value (see below) will provide the "interesting" info.
 791          */
 792         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
 793         rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
 794                 IWLAGN_OFDM_RSSI_A_BIT_POS;
 795         rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
 796                 IWLAGN_OFDM_RSSI_B_BIT_POS;
 797         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
 798         rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
 799                 IWLAGN_OFDM_RSSI_C_BIT_POS;
 800
 801         max_rssi = max_t(u32, rssi_a, rssi_b);
 802         max_rssi = max_t(u32, max_rssi, rssi_c);
 803
 804         IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
 805                 rssi_a, rssi_b, rssi_c, max_rssi, agc);
 806
 807         /* dBm = max_rssi dB - agc dB - constant.
 808          * Higher AGC (higher radio gain) means lower signal. */
 809         return max_rssi - agc - IWLAGN_RSSI_OFFSET;
 810 }
 811
 812 /* Called for REPLY_RX (legacy ABG frames), or
 813  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
 814 static void iwl_rx_reply_rx(struct iwl_priv *priv,
 815                             struct iwl_rx_mem_buffer *rxb)
 816 {
 817         struct ieee80211_hdr *header;
 818         struct ieee80211_rx_status rx_status;
 819         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 820         struct iwl_rx_phy_res *phy_res;
 821         __le32 rx_pkt_status;
 822         struct iwl_rx_mpdu_res_start *amsdu;
 823         u32 len;
 824         u32 ampdu_status;
 825         u32 rate_n_flags;
 826
 827         /**
 828          * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
 829          *      REPLY_RX: physical layer info is in this buffer
 830          *      REPLY_RX_MPDU_CMD: physical layer info was sent in separate
 831          *              command and cached in priv->last_phy_res
 832          *
 833          * Here we set up local variables depending on which command is
 834          * received.
 835          */
 836         if (pkt->hdr.cmd == REPLY_RX) {
 837                 phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
 838                 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
 839                                 + phy_res->cfg_phy_cnt);
 840
 841                 len = le16_to_cpu(phy_res->byte_count);
 842                 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
 843                                 phy_res->cfg_phy_cnt + len);
 844                 ampdu_status = le32_to_cpu(rx_pkt_status);
 845         } else {
 846                 if (!priv->last_phy_res_valid) {
 847                         IWL_ERR(priv, "MPDU frame without cached PHY data\n");
 848                         return;
 849                 }
 850                 phy_res = &priv->last_phy_res;
 851                 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw;
 852                 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
 853                 len = le16_to_cpu(amsdu->byte_count);
 854                 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
 855                 ampdu_status = iwl_translate_rx_status(priv,
 856                                                 le32_to_cpu(rx_pkt_status));
 857         }
 858
 859         if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
 860                 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
 861                                 phy_res->cfg_phy_cnt);
 862                 return;
 863         }
 864
 865         if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
 866             !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 867                 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
 868                                 le32_to_cpu(rx_pkt_status));
 869                 return;
 870         }
 871
 872         /* This will be used in several places later */
 873         rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
 874
 875         /* rx_status carries information about the packet to mac80211 */
 876         rx_status.mactime = le64_to_cpu(phy_res->timestamp);
 877         rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 878                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 879         rx_status.freq =
 880                 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
 881                                                rx_status.band);
 882         rx_status.rate_idx =
 883                 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
 884         rx_status.flag = 0;
 885
 886         /* TSF isn't reliable. In order to allow smooth user experience,
 887          * this W/A doesn't propagate it to the mac80211 */
 888         /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
 889
 890         priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
 891
 892         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
 893         rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
 894
 895         iwl_dbg_log_rx_data_frame(priv, len, header);
 896         IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
 897                 rx_status.signal, (unsigned long long)rx_status.mactime);
 898
 899         /*
 900          * "antenna number"
 901          *
 902          * It seems that the antenna field in the phy flags value
 903          * is actually a bit field. This is undefined by radiotap,
 904          * it wants an actual antenna number but I always get "7"
 905          * for most legacy frames I receive indicating that the
 906          * same frame was received on all three RX chains.
 907          *
 908          * I think this field should be removed in favor of a
 909          * new 802.11n radiotap field "RX chains" that is defined
 910          * as a bitmask.
 911          */
 912         rx_status.antenna =
 913                 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
 914                 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 915
 916         /* set the preamble flag if appropriate */
 917         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 918                 rx_status.flag |= RX_FLAG_SHORTPRE;
 919
 920         /* Set up the HT phy flags */
 921         if (rate_n_flags & RATE_MCS_HT_MSK)
 922                 rx_status.flag |= RX_FLAG_HT;
 923         if (rate_n_flags & RATE_MCS_HT40_MSK)
 924                 rx_status.flag |= RX_FLAG_40MHZ;
 925         if (rate_n_flags & RATE_MCS_SGI_MSK)
 926                 rx_status.flag |= RX_FLAG_SHORT_GI;
 927
 928         iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status,
 929                                     rxb, &rx_status);
 930 }
 931
 932 /**
 933  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 934  *
 935  * Setup the RX handlers for each of the reply types sent from the uCode
 936  * to the host.
 937  */
 938 void iwl_setup_rx_handlers(struct iwl_priv *priv)
 939 {
 940         void (**handlers)(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
 941
 942         handlers = priv->rx_handlers;
 943
 944         handlers[REPLY_ERROR]                   = iwl_rx_reply_error;
 945         handlers[CHANNEL_SWITCH_NOTIFICATION]   = iwl_rx_csa;
 946         handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl_rx_spectrum_measure_notif;
 947         handlers[PM_SLEEP_NOTIFICATION]         = iwl_rx_pm_sleep_notif;
 948         handlers[PM_DEBUG_STATISTIC_NOTIFIC]    = iwl_rx_pm_debug_statistics_notif;
 949         handlers[BEACON_NOTIFICATION]           = iwl_rx_beacon_notif;
 950
 951         /*
 952          * The same handler is used for both the REPLY to a discrete
 953          * statistics request from the host as well as for the periodic
 954          * statistics notifications (after received beacons) from the uCode.
 955          */
 956         handlers[REPLY_STATISTICS_CMD]          = iwl_rx_reply_statistics;
 957         handlers[STATISTICS_NOTIFICATION]       = iwl_rx_statistics;
 958
 959         iwl_setup_rx_scan_handlers(priv);
 960
 961         handlers[CARD_STATE_NOTIFICATION]       = iwl_rx_card_state_notif;
 962         handlers[MISSED_BEACONS_NOTIFICATION]   = iwl_rx_missed_beacon_notif;
 963
 964         /* Rx handlers */
 965         handlers[REPLY_RX_PHY_CMD]              = iwl_rx_reply_rx_phy;
 966         handlers[REPLY_RX_MPDU_CMD]             = iwl_rx_reply_rx;
 967
 968         /* block ack */
 969         handlers[REPLY_COMPRESSED_BA]           = iwlagn_rx_reply_compressed_ba;
 970
 971         /* init calibration handlers */
 972         priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
 973                                         iwlagn_rx_calib_result;
 974         priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
 975
 976         /* set up notification wait support */
 977         spin_lock_init(&priv->notif_wait_lock);
 978         INIT_LIST_HEAD(&priv->notif_waits);
 979         init_waitqueue_head(&priv->notif_waitq);
 980
 981         /* Set up BT Rx handlers */
 982         if (priv->cfg->lib->bt_rx_handler_setup)
 983                 priv->cfg->lib->bt_rx_handler_setup(priv);
 984
 985 }
 986
 987 void iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 988 {
 989         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 990
 991         /*
 992          * Do the notification wait before RX handlers so
 993          * even if the RX handler consumes the RXB we have
 994          * access to it in the notification wait entry.
 995          */
 996         if (!list_empty(&priv->notif_waits)) {
 997                 struct iwl_notification_wait *w;
 998
 999                 spin_lock(&priv->notif_wait_lock);
1000                 list_for_each_entry(w, &priv->notif_waits, list) {
1001                         if (w->cmd != pkt->hdr.cmd)
1002                                 continue;
1003                         IWL_DEBUG_RX(priv,
1004                                 "Notif: %s, 0x%02x - wake the callers up\n",
1005                                 get_cmd_string(pkt->hdr.cmd),
1006                                 pkt->hdr.cmd);
1007                         w->triggered = true;
1008                         if (w->fn)
1009                                 w->fn(priv, pkt, w->fn_data);
1010                 }
1011                 spin_unlock(&priv->notif_wait_lock);
1012
1013                 wake_up_all(&priv->notif_waitq);
1014         }
1015
1016         if (priv->pre_rx_handler)
1017                 priv->pre_rx_handler(priv, rxb);
1018
1019         /* Based on type of command response or notification,
1020          *   handle those that need handling via function in
1021          *   rx_handlers table.  See iwl_setup_rx_handlers() */
1022         if (priv->rx_handlers[pkt->hdr.cmd]) {
1023                 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1024                 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1025         } else {
1026                 /* No handling needed */
1027                 IWL_DEBUG_RX(priv,
1028                         "No handler needed for %s, 0x%02x\n",
1029                         get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1030         }
1031 }