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.
   9  *
  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.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
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  20  * along with this program; if not, write to the Free Software
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  22  * USA
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  30  *
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  32  *
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  41  *    notice, this list of conditions and the following disclaimer.
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  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  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                 int dtimper = vif->bss_conf.dtim_period ?: 1;
  78                 int dtimper_msec = dtimper * vif->bss_conf.beacon_int;
  79
  80                 IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val);
  81                 if (val * MSEC_PER_SEC < 3 * dtimper_msec)
  82                         IWL_WARN(mvm,
  83                                  "debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n",
  84                                  val * MSEC_PER_SEC, 3 * dtimper_msec);
  85                 dbgfs_pm->keep_alive_seconds = val;
  86                 break;
  87         }
  88         case MVM_DEBUGFS_PM_SKIP_OVER_DTIM:
  89                 IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n",
  90                                 val ? "enabled" : "disabled");
  91                 dbgfs_pm->skip_over_dtim = val;
  92                 break;
  93         case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS:
  94                 IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val);
  95                 dbgfs_pm->skip_dtim_periods = val;
  96                 break;
  97         case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT:
  98                 IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val);
  99                 dbgfs_pm->rx_data_timeout = val;
 100                 break;
 101         case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT:
 102                 IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val);
 103                 dbgfs_pm->tx_data_timeout = val;
 104                 break;
 105         case MVM_DEBUGFS_PM_LPRX_ENA:
 106                 IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
 107                 dbgfs_pm->lprx_ena = val;
 108                 break;
 109         case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
 110                 IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
 111                 dbgfs_pm->lprx_rssi_threshold = val;
 112                 break;
 113         case MVM_DEBUGFS_PM_SNOOZE_ENABLE:
 114                 IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val);
 115                 dbgfs_pm->snooze_ena = val;
 116                 break;
 117         case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING:
 118                 IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val);
 119                 dbgfs_pm->uapsd_misbehaving = val;
 120                 break;
 121         }
 122 }
 123
 124 static ssize_t iwl_dbgfs_pm_params_write(struct ieee80211_vif *vif, char *buf,
 125                                          size_t count, loff_t *ppos)
 126 {
 127         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 128         struct iwl_mvm *mvm = mvmvif->mvm;
 129         enum iwl_dbgfs_pm_mask param;
 130         int val, ret;
 131
 132         if (!strncmp("keep_alive=", buf, 11)) {
 133                 if (sscanf(buf + 11, "%d", &val) != 1)
 134                         return -EINVAL;
 135                 param = MVM_DEBUGFS_PM_KEEP_ALIVE;
 136         } else if (!strncmp("skip_over_dtim=", buf, 15)) {
 137                 if (sscanf(buf + 15, "%d", &val) != 1)
 138                         return -EINVAL;
 139                 param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
 140         } else if (!strncmp("skip_dtim_periods=", buf, 18)) {
 141                 if (sscanf(buf + 18, "%d", &val) != 1)
 142                         return -EINVAL;
 143                 param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
 144         } else if (!strncmp("rx_data_timeout=", buf, 16)) {
 145                 if (sscanf(buf + 16, "%d", &val) != 1)
 146                         return -EINVAL;
 147                 param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
 148         } else if (!strncmp("tx_data_timeout=", buf, 16)) {
 149                 if (sscanf(buf + 16, "%d", &val) != 1)
 150                         return -EINVAL;
 151                 param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
 152         } else if (!strncmp("lprx=", buf, 5)) {
 153                 if (sscanf(buf + 5, "%d", &val) != 1)
 154                         return -EINVAL;
 155                 param = MVM_DEBUGFS_PM_LPRX_ENA;
 156         } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
 157                 if (sscanf(buf + 20, "%d", &val) != 1)
 158                         return -EINVAL;
 159                 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
 160                     POWER_LPRX_RSSI_THRESHOLD_MIN)
 161                         return -EINVAL;
 162                 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
 163         } else if (!strncmp("snooze_enable=", buf, 14)) {
 164                 if (sscanf(buf + 14, "%d", &val) != 1)
 165                         return -EINVAL;
 166                 param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
 167         } else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
 168                 if (sscanf(buf + 18, "%d", &val) != 1)
 169                         return -EINVAL;
 170                 param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
 171         } else {
 172                 return -EINVAL;
 173         }
 174
 175         mutex_lock(&mvm->mutex);
 176         iwl_dbgfs_update_pm(mvm, vif, param, val);
 177         ret = iwl_mvm_power_update_mac(mvm);
 178         mutex_unlock(&mvm->mutex);
 179
 180         return ret ?: count;
 181 }
 182
 183 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
 184                                         char __user *user_buf,
 185                                         size_t count, loff_t *ppos)
 186 {
 187         struct ieee80211_vif *vif = file->private_data;
 188         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 189         struct iwl_mvm *mvm = mvmvif->mvm;
 190         char buf[512];
 191         int bufsz = sizeof(buf);
 192         int pos;
 193
 194         pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz);
 195
 196         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 197 }
 198
 199 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 200                                          char __user *user_buf,
 201                                          size_t count, loff_t *ppos)
 202 {
 203         struct ieee80211_vif *vif = file->private_data;
 204         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 205         struct iwl_mvm *mvm = mvmvif->mvm;
 206         u8 ap_sta_id;
 207         struct ieee80211_chanctx_conf *chanctx_conf;
 208         char buf[512];
 209         int bufsz = sizeof(buf);
 210         int pos = 0;
 211         int i;
 212
 213         mutex_lock(&mvm->mutex);
 214
 215         ap_sta_id = mvmvif->ap_sta_id;
 216
 217         switch (ieee80211_vif_type_p2p(vif)) {
 218         case NL80211_IFTYPE_ADHOC:
 219                 pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n");
 220                 break;
 221         case NL80211_IFTYPE_STATION:
 222                 pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n");
 223                 break;
 224         case NL80211_IFTYPE_AP:
 225                 pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n");
 226                 break;
 227         case NL80211_IFTYPE_P2P_CLIENT:
 228                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n");
 229                 break;
 230         case NL80211_IFTYPE_P2P_GO:
 231                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n");
 232                 break;
 233         case NL80211_IFTYPE_P2P_DEVICE:
 234                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n");
 235                 break;
 236         default:
 237                 break;
 238         }
 239
 240         pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 241                          mvmvif->id, mvmvif->color);
 242         pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 243                          vif->bss_conf.bssid);
 244         pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 245         for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
 246                 pos += scnprintf(buf+pos, bufsz-pos,
 247                                  "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 248                                  i, mvmvif->queue_params[i].txop,
 249                                  mvmvif->queue_params[i].cw_min,
 250                                  mvmvif->queue_params[i].cw_max,
 251                                  mvmvif->queue_params[i].aifs,
 252                                  mvmvif->queue_params[i].uapsd);
 253
 254         if (vif->type == NL80211_IFTYPE_STATION &&
 255             ap_sta_id != IWL_MVM_STATION_COUNT) {
 256                 struct ieee80211_sta *sta;
 257
 258                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
 259                                                 lockdep_is_held(&mvm->mutex));
 260                 if (!IS_ERR_OR_NULL(sta)) {
 261                         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 262
 263                         pos += scnprintf(buf+pos, bufsz-pos,
 264                                          "ap_sta_id %d - reduced Tx power %d\n",
 265                                          ap_sta_id,
 266                                          mvm_sta->bt_reduced_txpower);
 267                 }
 268         }
 269
 270         rcu_read_lock();
 271         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 272         if (chanctx_conf)
 273                 pos += scnprintf(buf+pos, bufsz-pos,
 274                                  "idle rx chains %d, active rx chains: %d\n",
 275                                  chanctx_conf->rx_chains_static,
 276                                  chanctx_conf->rx_chains_dynamic);
 277         rcu_read_unlock();
 278
 279         mutex_unlock(&mvm->mutex);
 280
 281         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 282 }
 283
 284 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
 285                                 enum iwl_dbgfs_bf_mask param, int value)
 286 {
 287         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 288         struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
 289
 290         dbgfs_bf->mask |= param;
 291
 292         switch (param) {
 293         case MVM_DEBUGFS_BF_ENERGY_DELTA:
 294                 dbgfs_bf->bf_energy_delta = value;
 295                 break;
 296         case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
 297                 dbgfs_bf->bf_roaming_energy_delta = value;
 298                 break;
 299         case MVM_DEBUGFS_BF_ROAMING_STATE:
 300                 dbgfs_bf->bf_roaming_state = value;
 301                 break;
 302         case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
 303                 dbgfs_bf->bf_temp_threshold = value;
 304                 break;
 305         case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
 306                 dbgfs_bf->bf_temp_fast_filter = value;
 307                 break;
 308         case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
 309                 dbgfs_bf->bf_temp_slow_filter = value;
 310                 break;
 311         case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
 312                 dbgfs_bf->bf_enable_beacon_filter = value;
 313                 break;
 314         case MVM_DEBUGFS_BF_DEBUG_FLAG:
 315                 dbgfs_bf->bf_debug_flag = value;
 316                 break;
 317         case MVM_DEBUGFS_BF_ESCAPE_TIMER:
 318                 dbgfs_bf->bf_escape_timer = value;
 319                 break;
 320         case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
 321                 dbgfs_bf->ba_enable_beacon_abort = value;
 322                 break;
 323         case MVM_DEBUGFS_BA_ESCAPE_TIMER:
 324                 dbgfs_bf->ba_escape_timer = value;
 325                 break;
 326         }
 327 }
 328
 329 static ssize_t iwl_dbgfs_bf_params_write(struct ieee80211_vif *vif, char *buf,
 330                                          size_t count, loff_t *ppos)
 331 {
 332         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 333         struct iwl_mvm *mvm = mvmvif->mvm;
 334         enum iwl_dbgfs_bf_mask param;
 335         int value, ret = 0;
 336
 337         if (!strncmp("bf_energy_delta=", buf, 16)) {
 338                 if (sscanf(buf+16, "%d", &value) != 1)
 339                         return -EINVAL;
 340                 if (value < IWL_BF_ENERGY_DELTA_MIN ||
 341                     value > IWL_BF_ENERGY_DELTA_MAX)
 342                         return -EINVAL;
 343                 param = MVM_DEBUGFS_BF_ENERGY_DELTA;
 344         } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
 345                 if (sscanf(buf+24, "%d", &value) != 1)
 346                         return -EINVAL;
 347                 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
 348                     value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
 349                         return -EINVAL;
 350                 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
 351         } else if (!strncmp("bf_roaming_state=", buf, 17)) {
 352                 if (sscanf(buf+17, "%d", &value) != 1)
 353                         return -EINVAL;
 354                 if (value < IWL_BF_ROAMING_STATE_MIN ||
 355                     value > IWL_BF_ROAMING_STATE_MAX)
 356                         return -EINVAL;
 357                 param = MVM_DEBUGFS_BF_ROAMING_STATE;
 358         } else if (!strncmp("bf_temp_threshold=", buf, 18)) {
 359                 if (sscanf(buf+18, "%d", &value) != 1)
 360                         return -EINVAL;
 361                 if (value < IWL_BF_TEMP_THRESHOLD_MIN ||
 362                     value > IWL_BF_TEMP_THRESHOLD_MAX)
 363                         return -EINVAL;
 364                 param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
 365         } else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
 366                 if (sscanf(buf+20, "%d", &value) != 1)
 367                         return -EINVAL;
 368                 if (value < IWL_BF_TEMP_FAST_FILTER_MIN ||
 369                     value > IWL_BF_TEMP_FAST_FILTER_MAX)
 370                         return -EINVAL;
 371                 param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
 372         } else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
 373                 if (sscanf(buf+20, "%d", &value) != 1)
 374                         return -EINVAL;
 375                 if (value < IWL_BF_TEMP_SLOW_FILTER_MIN ||
 376                     value > IWL_BF_TEMP_SLOW_FILTER_MAX)
 377                         return -EINVAL;
 378                 param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
 379         } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
 380                 if (sscanf(buf+24, "%d", &value) != 1)
 381                         return -EINVAL;
 382                 if (value < 0 || value > 1)
 383                         return -EINVAL;
 384                 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
 385         } else if (!strncmp("bf_debug_flag=", buf, 14)) {
 386                 if (sscanf(buf+14, "%d", &value) != 1)
 387                         return -EINVAL;
 388                 if (value < 0 || value > 1)
 389                         return -EINVAL;
 390                 param = MVM_DEBUGFS_BF_DEBUG_FLAG;
 391         } else if (!strncmp("bf_escape_timer=", buf, 16)) {
 392                 if (sscanf(buf+16, "%d", &value) != 1)
 393                         return -EINVAL;
 394                 if (value < IWL_BF_ESCAPE_TIMER_MIN ||
 395                     value > IWL_BF_ESCAPE_TIMER_MAX)
 396                         return -EINVAL;
 397                 param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
 398         } else if (!strncmp("ba_escape_timer=", buf, 16)) {
 399                 if (sscanf(buf+16, "%d", &value) != 1)
 400                         return -EINVAL;
 401                 if (value < IWL_BA_ESCAPE_TIMER_MIN ||
 402                     value > IWL_BA_ESCAPE_TIMER_MAX)
 403                         return -EINVAL;
 404                 param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
 405         } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
 406                 if (sscanf(buf+23, "%d", &value) != 1)
 407                         return -EINVAL;
 408                 if (value < 0 || value > 1)
 409                         return -EINVAL;
 410                 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
 411         } else {
 412                 return -EINVAL;
 413         }
 414
 415         mutex_lock(&mvm->mutex);
 416         iwl_dbgfs_update_bf(vif, param, value);
 417         if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
 418                 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 419         else
 420                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
 421         mutex_unlock(&mvm->mutex);
 422
 423         return ret ?: count;
 424 }
 425
 426 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
 427                                         char __user *user_buf,
 428                                         size_t count, loff_t *ppos)
 429 {
 430         struct ieee80211_vif *vif = file->private_data;
 431         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 432         char buf[256];
 433         int pos = 0;
 434         const size_t bufsz = sizeof(buf);
 435         struct iwl_beacon_filter_cmd cmd = {
 436                 IWL_BF_CMD_CONFIG_DEFAULTS,
 437                 .bf_enable_beacon_filter =
 438                         cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
 439                 .ba_enable_beacon_abort =
 440                         cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
 441         };
 442
 443         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 444         if (mvmvif->bf_data.bf_enabled)
 445                 cmd.bf_enable_beacon_filter = cpu_to_le32(1);
 446         else
 447                 cmd.bf_enable_beacon_filter = 0;
 448
 449         pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
 450                          le32_to_cpu(cmd.bf_energy_delta));
 451         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
 452                          le32_to_cpu(cmd.bf_roaming_energy_delta));
 453         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
 454                          le32_to_cpu(cmd.bf_roaming_state));
 455         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
 456                          le32_to_cpu(cmd.bf_temp_threshold));
 457         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
 458                          le32_to_cpu(cmd.bf_temp_fast_filter));
 459         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
 460                          le32_to_cpu(cmd.bf_temp_slow_filter));
 461         pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
 462                          le32_to_cpu(cmd.bf_enable_beacon_filter));
 463         pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
 464                          le32_to_cpu(cmd.bf_debug_flag));
 465         pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
 466                          le32_to_cpu(cmd.bf_escape_timer));
 467         pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
 468                          le32_to_cpu(cmd.ba_escape_timer));
 469         pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
 470                          le32_to_cpu(cmd.ba_enable_beacon_abort));
 471
 472         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 473 }
 474
 475 static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
 476                                            size_t count, loff_t *ppos)
 477 {
 478         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 479         struct iwl_mvm *mvm = mvmvif->mvm;
 480         u8 value;
 481         int ret;
 482
 483         ret = kstrtou8(buf, 0, &value);
 484         if (ret)
 485                 return ret;
 486         if (value > 1)
 487                 return -EINVAL;
 488
 489         mutex_lock(&mvm->mutex);
 490         iwl_mvm_update_low_latency(mvm, vif, value);
 491         mutex_unlock(&mvm->mutex);
 492
 493         return count;
 494 }
 495
 496 static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
 497                                           char __user *user_buf,
 498                                           size_t count, loff_t *ppos)
 499 {
 500         struct ieee80211_vif *vif = file->private_data;
 501         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 502         char buf[3];
 503
 504         buf[0] = mvmvif->low_latency ? '1' : '0';
 505         buf[1] = '\n';
 506         buf[2] = '\0';
 507         return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof(buf));
 508 }
 509
 510 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
 511         _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 512 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
 513         _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 514 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {               \
 515                 if (!debugfs_create_file(#name, mode, parent, vif,      \
 516                                          &iwl_dbgfs_##name##_ops))      \
 517                         goto err;                                       \
 518         } while (0)
 519
 520 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 521 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
 522 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
 523 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
 524
 525 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 526 {
 527         struct dentry *dbgfs_dir = vif->debugfs_dir;
 528         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 529         char buf[100];
 530
 531         /*
 532          * Check if debugfs directory already exist before creating it.
 533          * This may happen when, for example, resetting hw or suspend-resume
 534          */
 535         if (!dbgfs_dir || mvmvif->dbgfs_dir)
 536                 return;
 537
 538         mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 539         mvmvif->mvm = mvm;
 540
 541         if (!mvmvif->dbgfs_dir) {
 542                 IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
 543                         dbgfs_dir->d_name.name);
 544                 return;
 545         }
 546
 547         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
 548             ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
 549              (vif->type == NL80211_IFTYPE_STATION && vif->p2p &&
 550               mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_DCM)))
 551                 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR |
 552                                          S_IRUSR);
 553
 554         MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, S_IRUSR);
 555         MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir,
 556                                  S_IRUSR | S_IWUSR);
 557
 558         if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 559             mvmvif == mvm->bf_allowed_vif)
 560                 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir,
 561                                          S_IRUSR | S_IWUSR);
 562
 563         /*
 564          * Create symlink for convenience pointing to interface specific
 565          * debugfs entries for the driver. For example, under
 566          * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
 567          * find
 568          * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
 569          */
 570         snprintf(buf, 100, "../../../%s/%s/%s/%s",
 571                  dbgfs_dir->d_parent->d_parent->d_name.name,
 572                  dbgfs_dir->d_parent->d_name.name,
 573                  dbgfs_dir->d_name.name,
 574                  mvmvif->dbgfs_dir->d_name.name);
 575
 576         mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
 577                                                      mvm->debugfs_dir, buf);
 578         if (!mvmvif->dbgfs_slink)
 579                 IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
 580                         dbgfs_dir->d_name.name);
 581         return;
 582 err:
 583         IWL_ERR(mvm, "Can't create debugfs entity\n");
 584 }
 585
 586 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 587 {
 588         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 589
 590         debugfs_remove(mvmvif->dbgfs_slink);
 591         mvmvif->dbgfs_slink = NULL;
 592
 593         debugfs_remove_recursive(mvmvif->dbgfs_dir);
 594         mvmvif->dbgfs_dir = NULL;
 595 }