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
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  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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  20  * along with this program; if not, write to the Free Software
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  44  *    the documentation and/or other materials provided with the
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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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  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                 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_LPRX_ENA:
 107                 IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
 108                 dbgfs_pm->lprx_ena = val;
 109                 break;
 110         case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
 111                 IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
 112                 dbgfs_pm->lprx_rssi_threshold = val;
 113                 break;
 114         case MVM_DEBUGFS_PM_SNOOZE_ENABLE:
 115                 IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val);
 116                 dbgfs_pm->snooze_ena = val;
 117                 break;
 118         case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING:
 119                 IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val);
 120                 dbgfs_pm->uapsd_misbehaving = val;
 121                 break;
 122         case MVM_DEBUGFS_PM_USE_PS_POLL:
 123                 IWL_DEBUG_POWER(mvm, "use_ps_poll=%d\n", val);
 124                 dbgfs_pm->use_ps_poll = 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("lprx=", buf, 5)) {
 158                 if (sscanf(buf + 5, "%d", &val) != 1)
 159                         return -EINVAL;
 160                 param = MVM_DEBUGFS_PM_LPRX_ENA;
 161         } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
 162                 if (sscanf(buf + 20, "%d", &val) != 1)
 163                         return -EINVAL;
 164                 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
 165                     POWER_LPRX_RSSI_THRESHOLD_MIN)
 166                         return -EINVAL;
 167                 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
 168         } else if (!strncmp("snooze_enable=", buf, 14)) {
 169                 if (sscanf(buf + 14, "%d", &val) != 1)
 170                         return -EINVAL;
 171                 param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
 172         } else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
 173                 if (sscanf(buf + 18, "%d", &val) != 1)
 174                         return -EINVAL;
 175                 param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
 176         } else if (!strncmp("use_ps_poll=", buf, 12)) {
 177                 if (sscanf(buf + 12, "%d", &val) != 1)
 178                         return -EINVAL;
 179                 param = MVM_DEBUGFS_PM_USE_PS_POLL;
 180         } else {
 181                 return -EINVAL;
 182         }
 183
 184         mutex_lock(&mvm->mutex);
 185         iwl_dbgfs_update_pm(mvm, vif, param, val);
 186         ret = iwl_mvm_power_update_mac(mvm);
 187         mutex_unlock(&mvm->mutex);
 188
 189         return ret ?: count;
 190 }
 191
 192 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
 193                                         char __user *user_buf,
 194                                         size_t count, loff_t *ppos)
 195 {
 196         struct ieee80211_vif *vif = file->private_data;
 197         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 198         struct iwl_mvm *mvm = mvmvif->mvm;
 199         char buf[512];
 200         int bufsz = sizeof(buf);
 201         int pos;
 202
 203         pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz);
 204
 205         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 206 }
 207
 208 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 209                                          char __user *user_buf,
 210                                          size_t count, loff_t *ppos)
 211 {
 212         struct ieee80211_vif *vif = file->private_data;
 213         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 214         struct iwl_mvm *mvm = mvmvif->mvm;
 215         u8 ap_sta_id;
 216         struct ieee80211_chanctx_conf *chanctx_conf;
 217         char buf[512];
 218         int bufsz = sizeof(buf);
 219         int pos = 0;
 220         int i;
 221
 222         mutex_lock(&mvm->mutex);
 223
 224         ap_sta_id = mvmvif->ap_sta_id;
 225
 226         switch (ieee80211_vif_type_p2p(vif)) {
 227         case NL80211_IFTYPE_ADHOC:
 228                 pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n");
 229                 break;
 230         case NL80211_IFTYPE_STATION:
 231                 pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n");
 232                 break;
 233         case NL80211_IFTYPE_AP:
 234                 pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n");
 235                 break;
 236         case NL80211_IFTYPE_P2P_CLIENT:
 237                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n");
 238                 break;
 239         case NL80211_IFTYPE_P2P_GO:
 240                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n");
 241                 break;
 242         case NL80211_IFTYPE_P2P_DEVICE:
 243                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n");
 244                 break;
 245         default:
 246                 break;
 247         }
 248
 249         pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 250                          mvmvif->id, mvmvif->color);
 251         pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 252                          vif->bss_conf.bssid);
 253         pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 254         for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
 255                 pos += scnprintf(buf+pos, bufsz-pos,
 256                                  "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 257                                  i, mvmvif->queue_params[i].txop,
 258                                  mvmvif->queue_params[i].cw_min,
 259                                  mvmvif->queue_params[i].cw_max,
 260                                  mvmvif->queue_params[i].aifs,
 261                                  mvmvif->queue_params[i].uapsd);
 262
 263         if (vif->type == NL80211_IFTYPE_STATION &&
 264             ap_sta_id != IWL_MVM_STATION_COUNT) {
 265                 struct ieee80211_sta *sta;
 266
 267                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
 268                                                 lockdep_is_held(&mvm->mutex));
 269                 if (!IS_ERR_OR_NULL(sta)) {
 270                         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 271
 272                         pos += scnprintf(buf+pos, bufsz-pos,
 273                                          "ap_sta_id %d - reduced Tx power %d\n",
 274                                          ap_sta_id,
 275                                          mvm_sta->bt_reduced_txpower);
 276                 }
 277         }
 278
 279         rcu_read_lock();
 280         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 281         if (chanctx_conf)
 282                 pos += scnprintf(buf+pos, bufsz-pos,
 283                                  "idle rx chains %d, active rx chains: %d\n",
 284                                  chanctx_conf->rx_chains_static,
 285                                  chanctx_conf->rx_chains_dynamic);
 286         rcu_read_unlock();
 287
 288         mutex_unlock(&mvm->mutex);
 289
 290         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 291 }
 292
 293 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
 294                                 enum iwl_dbgfs_bf_mask param, int value)
 295 {
 296         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 297         struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
 298
 299         dbgfs_bf->mask |= param;
 300
 301         switch (param) {
 302         case MVM_DEBUGFS_BF_ENERGY_DELTA:
 303                 dbgfs_bf->bf_energy_delta = value;
 304                 break;
 305         case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
 306                 dbgfs_bf->bf_roaming_energy_delta = value;
 307                 break;
 308         case MVM_DEBUGFS_BF_ROAMING_STATE:
 309                 dbgfs_bf->bf_roaming_state = value;
 310                 break;
 311         case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
 312                 dbgfs_bf->bf_temp_threshold = value;
 313                 break;
 314         case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
 315                 dbgfs_bf->bf_temp_fast_filter = value;
 316                 break;
 317         case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
 318                 dbgfs_bf->bf_temp_slow_filter = value;
 319                 break;
 320         case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
 321                 dbgfs_bf->bf_enable_beacon_filter = value;
 322                 break;
 323         case MVM_DEBUGFS_BF_DEBUG_FLAG:
 324                 dbgfs_bf->bf_debug_flag = value;
 325                 break;
 326         case MVM_DEBUGFS_BF_ESCAPE_TIMER:
 327                 dbgfs_bf->bf_escape_timer = value;
 328                 break;
 329         case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
 330                 dbgfs_bf->ba_enable_beacon_abort = value;
 331                 break;
 332         case MVM_DEBUGFS_BA_ESCAPE_TIMER:
 333                 dbgfs_bf->ba_escape_timer = value;
 334                 break;
 335         }
 336 }
 337
 338 static ssize_t iwl_dbgfs_bf_params_write(struct ieee80211_vif *vif, char *buf,
 339                                          size_t count, loff_t *ppos)
 340 {
 341         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 342         struct iwl_mvm *mvm = mvmvif->mvm;
 343         enum iwl_dbgfs_bf_mask param;
 344         int value, ret = 0;
 345
 346         if (!strncmp("bf_energy_delta=", buf, 16)) {
 347                 if (sscanf(buf+16, "%d", &value) != 1)
 348                         return -EINVAL;
 349                 if (value < IWL_BF_ENERGY_DELTA_MIN ||
 350                     value > IWL_BF_ENERGY_DELTA_MAX)
 351                         return -EINVAL;
 352                 param = MVM_DEBUGFS_BF_ENERGY_DELTA;
 353         } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
 354                 if (sscanf(buf+24, "%d", &value) != 1)
 355                         return -EINVAL;
 356                 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
 357                     value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
 358                         return -EINVAL;
 359                 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
 360         } else if (!strncmp("bf_roaming_state=", buf, 17)) {
 361                 if (sscanf(buf+17, "%d", &value) != 1)
 362                         return -EINVAL;
 363                 if (value < IWL_BF_ROAMING_STATE_MIN ||
 364                     value > IWL_BF_ROAMING_STATE_MAX)
 365                         return -EINVAL;
 366                 param = MVM_DEBUGFS_BF_ROAMING_STATE;
 367         } else if (!strncmp("bf_temp_threshold=", buf, 18)) {
 368                 if (sscanf(buf+18, "%d", &value) != 1)
 369                         return -EINVAL;
 370                 if (value < IWL_BF_TEMP_THRESHOLD_MIN ||
 371                     value > IWL_BF_TEMP_THRESHOLD_MAX)
 372                         return -EINVAL;
 373                 param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
 374         } else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
 375                 if (sscanf(buf+20, "%d", &value) != 1)
 376                         return -EINVAL;
 377                 if (value < IWL_BF_TEMP_FAST_FILTER_MIN ||
 378                     value > IWL_BF_TEMP_FAST_FILTER_MAX)
 379                         return -EINVAL;
 380                 param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
 381         } else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
 382                 if (sscanf(buf+20, "%d", &value) != 1)
 383                         return -EINVAL;
 384                 if (value < IWL_BF_TEMP_SLOW_FILTER_MIN ||
 385                     value > IWL_BF_TEMP_SLOW_FILTER_MAX)
 386                         return -EINVAL;
 387                 param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
 388         } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
 389                 if (sscanf(buf+24, "%d", &value) != 1)
 390                         return -EINVAL;
 391                 if (value < 0 || value > 1)
 392                         return -EINVAL;
 393                 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
 394         } else if (!strncmp("bf_debug_flag=", buf, 14)) {
 395                 if (sscanf(buf+14, "%d", &value) != 1)
 396                         return -EINVAL;
 397                 if (value < 0 || value > 1)
 398                         return -EINVAL;
 399                 param = MVM_DEBUGFS_BF_DEBUG_FLAG;
 400         } else if (!strncmp("bf_escape_timer=", buf, 16)) {
 401                 if (sscanf(buf+16, "%d", &value) != 1)
 402                         return -EINVAL;
 403                 if (value < IWL_BF_ESCAPE_TIMER_MIN ||
 404                     value > IWL_BF_ESCAPE_TIMER_MAX)
 405                         return -EINVAL;
 406                 param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
 407         } else if (!strncmp("ba_escape_timer=", buf, 16)) {
 408                 if (sscanf(buf+16, "%d", &value) != 1)
 409                         return -EINVAL;
 410                 if (value < IWL_BA_ESCAPE_TIMER_MIN ||
 411                     value > IWL_BA_ESCAPE_TIMER_MAX)
 412                         return -EINVAL;
 413                 param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
 414         } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
 415                 if (sscanf(buf+23, "%d", &value) != 1)
 416                         return -EINVAL;
 417                 if (value < 0 || value > 1)
 418                         return -EINVAL;
 419                 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
 420         } else {
 421                 return -EINVAL;
 422         }
 423
 424         mutex_lock(&mvm->mutex);
 425         iwl_dbgfs_update_bf(vif, param, value);
 426         if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
 427                 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 428         else
 429                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
 430         mutex_unlock(&mvm->mutex);
 431
 432         return ret ?: count;
 433 }
 434
 435 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
 436                                         char __user *user_buf,
 437                                         size_t count, loff_t *ppos)
 438 {
 439         struct ieee80211_vif *vif = file->private_data;
 440         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 441         char buf[256];
 442         int pos = 0;
 443         const size_t bufsz = sizeof(buf);
 444         struct iwl_beacon_filter_cmd cmd = {
 445                 IWL_BF_CMD_CONFIG_DEFAULTS,
 446                 .bf_enable_beacon_filter =
 447                         cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
 448                 .ba_enable_beacon_abort =
 449                         cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
 450         };
 451
 452         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 453         if (mvmvif->bf_data.bf_enabled)
 454                 cmd.bf_enable_beacon_filter = cpu_to_le32(1);
 455         else
 456                 cmd.bf_enable_beacon_filter = 0;
 457
 458         pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
 459                          le32_to_cpu(cmd.bf_energy_delta));
 460         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
 461                          le32_to_cpu(cmd.bf_roaming_energy_delta));
 462         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
 463                          le32_to_cpu(cmd.bf_roaming_state));
 464         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
 465                          le32_to_cpu(cmd.bf_temp_threshold));
 466         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
 467                          le32_to_cpu(cmd.bf_temp_fast_filter));
 468         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
 469                          le32_to_cpu(cmd.bf_temp_slow_filter));
 470         pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
 471                          le32_to_cpu(cmd.bf_enable_beacon_filter));
 472         pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
 473                          le32_to_cpu(cmd.bf_debug_flag));
 474         pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
 475                          le32_to_cpu(cmd.bf_escape_timer));
 476         pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
 477                          le32_to_cpu(cmd.ba_escape_timer));
 478         pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
 479                          le32_to_cpu(cmd.ba_enable_beacon_abort));
 480
 481         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 482 }
 483
 484 static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
 485                                            size_t count, loff_t *ppos)
 486 {
 487         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 488         struct iwl_mvm *mvm = mvmvif->mvm;
 489         u8 value;
 490         int ret;
 491
 492         ret = kstrtou8(buf, 0, &value);
 493         if (ret)
 494                 return ret;
 495         if (value > 1)
 496                 return -EINVAL;
 497
 498         mutex_lock(&mvm->mutex);
 499         iwl_mvm_update_low_latency(mvm, vif, value);
 500         mutex_unlock(&mvm->mutex);
 501
 502         return count;
 503 }
 504
 505 static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
 506                                           char __user *user_buf,
 507                                           size_t count, loff_t *ppos)
 508 {
 509         struct ieee80211_vif *vif = file->private_data;
 510         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 511         char buf[3];
 512
 513         buf[0] = mvmvif->low_latency ? '1' : '0';
 514         buf[1] = '\n';
 515         buf[2] = '\0';
 516         return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof(buf));
 517 }
 518
 519 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
 520         _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 521 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
 522         _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 523 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {               \
 524                 if (!debugfs_create_file(#name, mode, parent, vif,      \
 525                                          &iwl_dbgfs_##name##_ops))      \
 526                         goto err;                                       \
 527         } while (0)
 528
 529 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 530 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
 531 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
 532 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
 533
 534 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 535 {
 536         struct dentry *dbgfs_dir = vif->debugfs_dir;
 537         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 538         char buf[100];
 539
 540         /*
 541          * Check if debugfs directory already exist before creating it.
 542          * This may happen when, for example, resetting hw or suspend-resume
 543          */
 544         if (!dbgfs_dir || mvmvif->dbgfs_dir)
 545                 return;
 546
 547         mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 548         mvmvif->mvm = mvm;
 549
 550         if (!mvmvif->dbgfs_dir) {
 551                 IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
 552                         dbgfs_dir->d_name.name);
 553                 return;
 554         }
 555
 556         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
 557             ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
 558              (vif->type == NL80211_IFTYPE_STATION && vif->p2p &&
 559               mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_DCM)))
 560                 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR |
 561                                          S_IRUSR);
 562
 563         MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, S_IRUSR);
 564         MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir,
 565                                  S_IRUSR | S_IWUSR);
 566
 567         if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 568             mvmvif == mvm->bf_allowed_vif)
 569                 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir,
 570                                          S_IRUSR | S_IWUSR);
 571
 572         /*
 573          * Create symlink for convenience pointing to interface specific
 574          * debugfs entries for the driver. For example, under
 575          * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
 576          * find
 577          * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
 578          */
 579         snprintf(buf, 100, "../../../%s/%s/%s/%s",
 580                  dbgfs_dir->d_parent->d_parent->d_name.name,
 581                  dbgfs_dir->d_parent->d_name.name,
 582                  dbgfs_dir->d_name.name,
 583                  mvmvif->dbgfs_dir->d_name.name);
 584
 585         mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
 586                                                      mvm->debugfs_dir, buf);
 587         if (!mvmvif->dbgfs_slink)
 588                 IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
 589                         dbgfs_dir->d_name.name);
 590         return;
 591 err:
 592         IWL_ERR(mvm, "Can't create debugfs entity\n");
 593 }
 594
 595 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 596 {
 597         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 598
 599         debugfs_remove(mvmvif->dbgfs_slink);
 600         mvmvif->dbgfs_slink = NULL;
 601
 602         debugfs_remove_recursive(mvmvif->dbgfs_dir);
 603         mvmvif->dbgfs_dir = NULL;
 604 }