drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
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  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include "mvm.h"
  64 #include "debugfs.h"
  65
  66 static void iwl_dbgfs_update_pm(struct iwl_mvm *mvm,
  67                                  struct ieee80211_vif *vif,
  68                                  enum iwl_dbgfs_pm_mask param, int val)
  69 {
  70         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  71         struct iwl_dbgfs_pm *dbgfs_pm = &mvmvif->dbgfs_pm;
  72
  73         dbgfs_pm->mask |= param;
  74
  75         switch (param) {
  76         case MVM_DEBUGFS_PM_KEEP_ALIVE: {
  77                 struct ieee80211_hw *hw = mvm->hw;
  78                 int dtimper = hw->conf.ps_dtim_period ?: 1;
  79                 int dtimper_msec = dtimper * vif->bss_conf.beacon_int;
  80
  81                 IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val);
  82                 if (val * MSEC_PER_SEC < 3 * dtimper_msec)
  83                         IWL_WARN(mvm,
  84                                  "debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n",
  85                                  val * MSEC_PER_SEC, 3 * dtimper_msec);
  86                 dbgfs_pm->keep_alive_seconds = val;
  87                 break;
  88         }
  89         case MVM_DEBUGFS_PM_SKIP_OVER_DTIM:
  90                 IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n",
  91                                 val ? "enabled" : "disabled");
  92                 dbgfs_pm->skip_over_dtim = val;
  93                 break;
  94         case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS:
  95                 IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val);
  96                 dbgfs_pm->skip_dtim_periods = val;
  97                 break;
  98         case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT:
  99                 IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val);
 100                 dbgfs_pm->rx_data_timeout = val;
 101                 break;
 102         case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT:
 103                 IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val);
 104                 dbgfs_pm->tx_data_timeout = val;
 105                 break;
 106         case MVM_DEBUGFS_PM_DISABLE_POWER_OFF:
 107                 IWL_DEBUG_POWER(mvm, "disable_power_off=%d\n", val);
 108                 dbgfs_pm->disable_power_off = val;
 109                 break;
 110         case MVM_DEBUGFS_PM_LPRX_ENA:
 111                 IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
 112                 dbgfs_pm->lprx_ena = val;
 113                 break;
 114         case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
 115                 IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
 116                 dbgfs_pm->lprx_rssi_threshold = val;
 117                 break;
 118         case MVM_DEBUGFS_PM_SNOOZE_ENABLE:
 119                 IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val);
 120                 dbgfs_pm->snooze_ena = val;
 121                 break;
 122         case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING:
 123                 IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val);
 124                 dbgfs_pm->uapsd_misbehaving = val;
 125                 break;
 126         }
 127 }
 128
 129 static ssize_t iwl_dbgfs_pm_params_write(struct ieee80211_vif *vif, char *buf,
 130                                          size_t count, loff_t *ppos)
 131 {
 132         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 133         struct iwl_mvm *mvm = mvmvif->mvm;
 134         enum iwl_dbgfs_pm_mask param;
 135         int val, ret;
 136
 137         if (!strncmp("keep_alive=", buf, 11)) {
 138                 if (sscanf(buf + 11, "%d", &val) != 1)
 139                         return -EINVAL;
 140                 param = MVM_DEBUGFS_PM_KEEP_ALIVE;
 141         } else if (!strncmp("skip_over_dtim=", buf, 15)) {
 142                 if (sscanf(buf + 15, "%d", &val) != 1)
 143                         return -EINVAL;
 144                 param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
 145         } else if (!strncmp("skip_dtim_periods=", buf, 18)) {
 146                 if (sscanf(buf + 18, "%d", &val) != 1)
 147                         return -EINVAL;
 148                 param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
 149         } else if (!strncmp("rx_data_timeout=", buf, 16)) {
 150                 if (sscanf(buf + 16, "%d", &val) != 1)
 151                         return -EINVAL;
 152                 param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
 153         } else if (!strncmp("tx_data_timeout=", buf, 16)) {
 154                 if (sscanf(buf + 16, "%d", &val) != 1)
 155                         return -EINVAL;
 156                 param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
 157         } else if (!strncmp("disable_power_off=", buf, 18) &&
 158                    !(mvm->fw->ucode_capa.flags &
 159                      IWL_UCODE_TLV_FLAGS_DEVICE_PS_CMD)) {
 160                 if (sscanf(buf + 18, "%d", &val) != 1)
 161                         return -EINVAL;
 162                 param = MVM_DEBUGFS_PM_DISABLE_POWER_OFF;
 163         } else if (!strncmp("lprx=", buf, 5)) {
 164                 if (sscanf(buf + 5, "%d", &val) != 1)
 165                         return -EINVAL;
 166                 param = MVM_DEBUGFS_PM_LPRX_ENA;
 167         } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
 168                 if (sscanf(buf + 20, "%d", &val) != 1)
 169                         return -EINVAL;
 170                 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
 171                     POWER_LPRX_RSSI_THRESHOLD_MIN)
 172                         return -EINVAL;
 173                 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
 174         } else if (!strncmp("snooze_enable=", buf, 14)) {
 175                 if (sscanf(buf + 14, "%d", &val) != 1)
 176                         return -EINVAL;
 177                 param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
 178         } else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
 179                 if (sscanf(buf + 18, "%d", &val) != 1)
 180                         return -EINVAL;
 181                 param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
 182         } else {
 183                 return -EINVAL;
 184         }
 185
 186         mutex_lock(&mvm->mutex);
 187         iwl_dbgfs_update_pm(mvm, vif, param, val);
 188         ret = iwl_mvm_power_update_mac(mvm, vif);
 189         mutex_unlock(&mvm->mutex);
 190
 191         return ret ?: count;
 192 }
 193
 194 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
 195                                         char __user *user_buf,
 196                                         size_t count, loff_t *ppos)
 197 {
 198         struct ieee80211_vif *vif = file->private_data;
 199         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 200         struct iwl_mvm *mvm = mvmvif->mvm;
 201         char buf[512];
 202         int bufsz = sizeof(buf);
 203         int pos;
 204
 205         pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz);
 206
 207         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 208 }
 209
 210 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 211                                          char __user *user_buf,
 212                                          size_t count, loff_t *ppos)
 213 {
 214         struct ieee80211_vif *vif = file->private_data;
 215         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 216         struct iwl_mvm *mvm = mvmvif->mvm;
 217         u8 ap_sta_id;
 218         struct ieee80211_chanctx_conf *chanctx_conf;
 219         char buf[512];
 220         int bufsz = sizeof(buf);
 221         int pos = 0;
 222         int i;
 223
 224         mutex_lock(&mvm->mutex);
 225
 226         ap_sta_id = mvmvif->ap_sta_id;
 227
 228         switch (ieee80211_vif_type_p2p(vif)) {
 229         case NL80211_IFTYPE_ADHOC:
 230                 pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n");
 231                 break;
 232         case NL80211_IFTYPE_STATION:
 233                 pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n");
 234                 break;
 235         case NL80211_IFTYPE_AP:
 236                 pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n");
 237                 break;
 238         case NL80211_IFTYPE_P2P_CLIENT:
 239                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n");
 240                 break;
 241         case NL80211_IFTYPE_P2P_GO:
 242                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n");
 243                 break;
 244         case NL80211_IFTYPE_P2P_DEVICE:
 245                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n");
 246                 break;
 247         default:
 248                 break;
 249         }
 250
 251         pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 252                          mvmvif->id, mvmvif->color);
 253         pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 254                          vif->bss_conf.bssid);
 255         pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 256         for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
 257                 pos += scnprintf(buf+pos, bufsz-pos,
 258                                  "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 259                                  i, mvmvif->queue_params[i].txop,
 260                                  mvmvif->queue_params[i].cw_min,
 261                                  mvmvif->queue_params[i].cw_max,
 262                                  mvmvif->queue_params[i].aifs,
 263                                  mvmvif->queue_params[i].uapsd);
 264
 265         if (vif->type == NL80211_IFTYPE_STATION &&
 266             ap_sta_id != IWL_MVM_STATION_COUNT) {
 267                 struct ieee80211_sta *sta;
 268
 269                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
 270                                                 lockdep_is_held(&mvm->mutex));
 271                 if (!IS_ERR_OR_NULL(sta)) {
 272                         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 273
 274                         pos += scnprintf(buf+pos, bufsz-pos,
 275                                          "ap_sta_id %d - reduced Tx power %d force %d\n",
 276                                          ap_sta_id,
 277                                          mvm_sta->bt_reduced_txpower,
 278                                          mvm_sta->bt_reduced_txpower_dbg);
 279                 }
 280         }
 281
 282         rcu_read_lock();
 283         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 284         if (chanctx_conf)
 285                 pos += scnprintf(buf+pos, bufsz-pos,
 286                                  "idle rx chains %d, active rx chains: %d\n",
 287                                  chanctx_conf->rx_chains_static,
 288                                  chanctx_conf->rx_chains_dynamic);
 289         rcu_read_unlock();
 290
 291         mutex_unlock(&mvm->mutex);
 292
 293         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 294 }
 295
 296 static ssize_t iwl_dbgfs_reduced_txp_write(struct ieee80211_vif *vif,
 297                                            char *buf, size_t count,
 298                                            loff_t *ppos)
 299 {
 300         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 301         struct iwl_mvm *mvm = mvmvif->mvm;
 302         struct iwl_mvm_sta *mvmsta;
 303         bool reduced_tx_power;
 304         int ret;
 305
 306         if (mvmvif->ap_sta_id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))
 307                 return -ENOTCONN;
 308
 309         if (strtobool(buf, &reduced_tx_power) != 0)
 310                 return -EINVAL;
 311
 312         mutex_lock(&mvm->mutex);
 313
 314         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
 315         if (IS_ERR_OR_NULL(mvmsta)) {
 316                 mutex_unlock(&mvm->mutex);
 317                 return -ENOTCONN;
 318         }
 319
 320         mvmsta->bt_reduced_txpower_dbg = false;
 321         ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
 322                                           reduced_tx_power);
 323         if (!ret)
 324                 mvmsta->bt_reduced_txpower_dbg = true;
 325
 326         mutex_unlock(&mvm->mutex);
 327
 328         return ret ? : count;
 329 }
 330
 331 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
 332                                 enum iwl_dbgfs_bf_mask param, int value)
 333 {
 334         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 335         struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
 336
 337         dbgfs_bf->mask |= param;
 338
 339         switch (param) {
 340         case MVM_DEBUGFS_BF_ENERGY_DELTA:
 341                 dbgfs_bf->bf_energy_delta = value;
 342                 break;
 343         case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
 344                 dbgfs_bf->bf_roaming_energy_delta = value;
 345                 break;
 346         case MVM_DEBUGFS_BF_ROAMING_STATE:
 347                 dbgfs_bf->bf_roaming_state = value;
 348                 break;
 349         case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
 350                 dbgfs_bf->bf_temp_threshold = value;
 351                 break;
 352         case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
 353                 dbgfs_bf->bf_temp_fast_filter = value;
 354                 break;
 355         case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
 356                 dbgfs_bf->bf_temp_slow_filter = value;
 357                 break;
 358         case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
 359                 dbgfs_bf->bf_enable_beacon_filter = value;
 360                 break;
 361         case MVM_DEBUGFS_BF_DEBUG_FLAG:
 362                 dbgfs_bf->bf_debug_flag = value;
 363                 break;
 364         case MVM_DEBUGFS_BF_ESCAPE_TIMER:
 365                 dbgfs_bf->bf_escape_timer = value;
 366                 break;
 367         case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
 368                 dbgfs_bf->ba_enable_beacon_abort = value;
 369                 break;
 370         case MVM_DEBUGFS_BA_ESCAPE_TIMER:
 371                 dbgfs_bf->ba_escape_timer = value;
 372                 break;
 373         }
 374 }
 375
 376 static ssize_t iwl_dbgfs_bf_params_write(struct ieee80211_vif *vif, char *buf,
 377                                          size_t count, loff_t *ppos)
 378 {
 379         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 380         struct iwl_mvm *mvm = mvmvif->mvm;
 381         enum iwl_dbgfs_bf_mask param;
 382         int value, ret = 0;
 383
 384         if (!strncmp("bf_energy_delta=", buf, 16)) {
 385                 if (sscanf(buf+16, "%d", &value) != 1)
 386                         return -EINVAL;
 387                 if (value < IWL_BF_ENERGY_DELTA_MIN ||
 388                     value > IWL_BF_ENERGY_DELTA_MAX)
 389                         return -EINVAL;
 390                 param = MVM_DEBUGFS_BF_ENERGY_DELTA;
 391         } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
 392                 if (sscanf(buf+24, "%d", &value) != 1)
 393                         return -EINVAL;
 394                 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
 395                     value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
 396                         return -EINVAL;
 397                 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
 398         } else if (!strncmp("bf_roaming_state=", buf, 17)) {
 399                 if (sscanf(buf+17, "%d", &value) != 1)
 400                         return -EINVAL;
 401                 if (value < IWL_BF_ROAMING_STATE_MIN ||
 402                     value > IWL_BF_ROAMING_STATE_MAX)
 403                         return -EINVAL;
 404                 param = MVM_DEBUGFS_BF_ROAMING_STATE;
 405         } else if (!strncmp("bf_temp_threshold=", buf, 18)) {
 406                 if (sscanf(buf+18, "%d", &value) != 1)
 407                         return -EINVAL;
 408                 if (value < IWL_BF_TEMP_THRESHOLD_MIN ||
 409                     value > IWL_BF_TEMP_THRESHOLD_MAX)
 410                         return -EINVAL;
 411                 param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
 412         } else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
 413                 if (sscanf(buf+20, "%d", &value) != 1)
 414                         return -EINVAL;
 415                 if (value < IWL_BF_TEMP_FAST_FILTER_MIN ||
 416                     value > IWL_BF_TEMP_FAST_FILTER_MAX)
 417                         return -EINVAL;
 418                 param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
 419         } else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
 420                 if (sscanf(buf+20, "%d", &value) != 1)
 421                         return -EINVAL;
 422                 if (value < IWL_BF_TEMP_SLOW_FILTER_MIN ||
 423                     value > IWL_BF_TEMP_SLOW_FILTER_MAX)
 424                         return -EINVAL;
 425                 param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
 426         } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
 427                 if (sscanf(buf+24, "%d", &value) != 1)
 428                         return -EINVAL;
 429                 if (value < 0 || value > 1)
 430                         return -EINVAL;
 431                 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
 432         } else if (!strncmp("bf_debug_flag=", buf, 14)) {
 433                 if (sscanf(buf+14, "%d", &value) != 1)
 434                         return -EINVAL;
 435                 if (value < 0 || value > 1)
 436                         return -EINVAL;
 437                 param = MVM_DEBUGFS_BF_DEBUG_FLAG;
 438         } else if (!strncmp("bf_escape_timer=", buf, 16)) {
 439                 if (sscanf(buf+16, "%d", &value) != 1)
 440                         return -EINVAL;
 441                 if (value < IWL_BF_ESCAPE_TIMER_MIN ||
 442                     value > IWL_BF_ESCAPE_TIMER_MAX)
 443                         return -EINVAL;
 444                 param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
 445         } else if (!strncmp("ba_escape_timer=", buf, 16)) {
 446                 if (sscanf(buf+16, "%d", &value) != 1)
 447                         return -EINVAL;
 448                 if (value < IWL_BA_ESCAPE_TIMER_MIN ||
 449                     value > IWL_BA_ESCAPE_TIMER_MAX)
 450                         return -EINVAL;
 451                 param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
 452         } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
 453                 if (sscanf(buf+23, "%d", &value) != 1)
 454                         return -EINVAL;
 455                 if (value < 0 || value > 1)
 456                         return -EINVAL;
 457                 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
 458         } else {
 459                 return -EINVAL;
 460         }
 461
 462         mutex_lock(&mvm->mutex);
 463         iwl_dbgfs_update_bf(vif, param, value);
 464         if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
 465                 ret = iwl_mvm_disable_beacon_filter(mvm, vif, CMD_SYNC);
 466         else
 467                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, CMD_SYNC);
 468         mutex_unlock(&mvm->mutex);
 469
 470         return ret ?: count;
 471 }
 472
 473 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
 474                                         char __user *user_buf,
 475                                         size_t count, loff_t *ppos)
 476 {
 477         struct ieee80211_vif *vif = file->private_data;
 478         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 479         char buf[256];
 480         int pos = 0;
 481         const size_t bufsz = sizeof(buf);
 482         struct iwl_beacon_filter_cmd cmd = {
 483                 IWL_BF_CMD_CONFIG_DEFAULTS,
 484                 .bf_enable_beacon_filter =
 485                         cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
 486                 .ba_enable_beacon_abort =
 487                         cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
 488         };
 489
 490         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 491         if (mvmvif->bf_data.bf_enabled)
 492                 cmd.bf_enable_beacon_filter = cpu_to_le32(1);
 493         else
 494                 cmd.bf_enable_beacon_filter = 0;
 495
 496         pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
 497                          le32_to_cpu(cmd.bf_energy_delta));
 498         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
 499                          le32_to_cpu(cmd.bf_roaming_energy_delta));
 500         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
 501                          le32_to_cpu(cmd.bf_roaming_state));
 502         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
 503                          le32_to_cpu(cmd.bf_temp_threshold));
 504         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
 505                          le32_to_cpu(cmd.bf_temp_fast_filter));
 506         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
 507                          le32_to_cpu(cmd.bf_temp_slow_filter));
 508         pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
 509                          le32_to_cpu(cmd.bf_enable_beacon_filter));
 510         pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
 511                          le32_to_cpu(cmd.bf_debug_flag));
 512         pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
 513                          le32_to_cpu(cmd.bf_escape_timer));
 514         pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
 515                          le32_to_cpu(cmd.ba_escape_timer));
 516         pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
 517                          le32_to_cpu(cmd.ba_enable_beacon_abort));
 518
 519         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 520 }
 521
 522 static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
 523                                            size_t count, loff_t *ppos)
 524 {
 525         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 526         struct iwl_mvm *mvm = mvmvif->mvm;
 527         u8 value;
 528         int ret;
 529
 530         ret = kstrtou8(buf, 0, &value);
 531         if (ret)
 532                 return ret;
 533         if (value > 1)
 534                 return -EINVAL;
 535
 536         mutex_lock(&mvm->mutex);
 537         iwl_mvm_update_low_latency(mvm, vif, value);
 538         mutex_unlock(&mvm->mutex);
 539
 540         return count;
 541 }
 542
 543 static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
 544                                           char __user *user_buf,
 545                                           size_t count, loff_t *ppos)
 546 {
 547         struct ieee80211_vif *vif = file->private_data;
 548         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 549         char buf[3];
 550
 551         buf[0] = mvmvif->low_latency ? '1' : '0';
 552         buf[1] = '\n';
 553         buf[2] = '\0';
 554         return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof(buf));
 555 }
 556
 557 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
 558         _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 559 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
 560         _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 561 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {               \
 562                 if (!debugfs_create_file(#name, mode, parent, vif,      \
 563                                          &iwl_dbgfs_##name##_ops))      \
 564                         goto err;                                       \
 565         } while (0)
 566
 567 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 568 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
 569 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
 570 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
 571 MVM_DEBUGFS_WRITE_FILE_OPS(reduced_txp, 10);
 572
 573 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 574 {
 575         struct dentry *dbgfs_dir = vif->debugfs_dir;
 576         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 577         char buf[100];
 578
 579         /*
 580          * Check if debugfs directory already exist before creating it.
 581          * This may happen when, for example, resetting hw or suspend-resume
 582          */
 583         if (!dbgfs_dir || mvmvif->dbgfs_dir)
 584                 return;
 585
 586         mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 587         mvmvif->mvm = mvm;
 588
 589         if (!mvmvif->dbgfs_dir) {
 590                 IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
 591                         dbgfs_dir->d_name.name);
 592                 return;
 593         }
 594
 595         if ((mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PM_CMD_SUPPORT) &&
 596             iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
 597             ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
 598              (vif->type == NL80211_IFTYPE_STATION && vif->p2p &&
 599               mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_DCM)))
 600                 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR |
 601                                          S_IRUSR);
 602
 603         MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, S_IRUSR);
 604         MVM_DEBUGFS_ADD_FILE_VIF(reduced_txp, mvmvif->dbgfs_dir, S_IWUSR);
 605         MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir,
 606                                  S_IRUSR | S_IWUSR);
 607
 608         if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 609             mvmvif == mvm->bf_allowed_vif)
 610                 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir,
 611                                          S_IRUSR | S_IWUSR);
 612
 613         /*
 614          * Create symlink for convenience pointing to interface specific
 615          * debugfs entries for the driver. For example, under
 616          * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
 617          * find
 618          * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
 619          */
 620         snprintf(buf, 100, "../../../%s/%s/%s/%s",
 621                  dbgfs_dir->d_parent->d_parent->d_name.name,
 622                  dbgfs_dir->d_parent->d_name.name,
 623                  dbgfs_dir->d_name.name,
 624                  mvmvif->dbgfs_dir->d_name.name);
 625
 626         mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
 627                                                      mvm->debugfs_dir, buf);
 628         if (!mvmvif->dbgfs_slink)
 629                 IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
 630                         dbgfs_dir->d_name.name);
 631         return;
 632 err:
 633         IWL_ERR(mvm, "Can't create debugfs entity\n");
 634 }
 635
 636 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 637 {
 638         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 639
 640         debugfs_remove(mvmvif->dbgfs_slink);
 641         mvmvif->dbgfs_slink = NULL;
 642
 643         debugfs_remove_recursive(mvmvif->dbgfs_dir);
 644         mvmvif->dbgfs_dir = NULL;
 645 }