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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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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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
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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                 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         }
 123 }
 124
 125 static ssize_t iwl_dbgfs_pm_params_write(struct ieee80211_vif *vif, char *buf,
 126                                          size_t count, loff_t *ppos)
 127 {
 128         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 129         struct iwl_mvm *mvm = mvmvif->mvm;
 130         enum iwl_dbgfs_pm_mask param;
 131         int val, ret;
 132
 133         if (!strncmp("keep_alive=", buf, 11)) {
 134                 if (sscanf(buf + 11, "%d", &val) != 1)
 135                         return -EINVAL;
 136                 param = MVM_DEBUGFS_PM_KEEP_ALIVE;
 137         } else if (!strncmp("skip_over_dtim=", buf, 15)) {
 138                 if (sscanf(buf + 15, "%d", &val) != 1)
 139                         return -EINVAL;
 140                 param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
 141         } else if (!strncmp("skip_dtim_periods=", buf, 18)) {
 142                 if (sscanf(buf + 18, "%d", &val) != 1)
 143                         return -EINVAL;
 144                 param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
 145         } else if (!strncmp("rx_data_timeout=", buf, 16)) {
 146                 if (sscanf(buf + 16, "%d", &val) != 1)
 147                         return -EINVAL;
 148                 param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
 149         } else if (!strncmp("tx_data_timeout=", buf, 16)) {
 150                 if (sscanf(buf + 16, "%d", &val) != 1)
 151                         return -EINVAL;
 152                 param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
 153         } else if (!strncmp("lprx=", buf, 5)) {
 154                 if (sscanf(buf + 5, "%d", &val) != 1)
 155                         return -EINVAL;
 156                 param = MVM_DEBUGFS_PM_LPRX_ENA;
 157         } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
 158                 if (sscanf(buf + 20, "%d", &val) != 1)
 159                         return -EINVAL;
 160                 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
 161                     POWER_LPRX_RSSI_THRESHOLD_MIN)
 162                         return -EINVAL;
 163                 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
 164         } else if (!strncmp("snooze_enable=", buf, 14)) {
 165                 if (sscanf(buf + 14, "%d", &val) != 1)
 166                         return -EINVAL;
 167                 param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
 168         } else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
 169                 if (sscanf(buf + 18, "%d", &val) != 1)
 170                         return -EINVAL;
 171                 param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
 172         } else {
 173                 return -EINVAL;
 174         }
 175
 176         mutex_lock(&mvm->mutex);
 177         iwl_dbgfs_update_pm(mvm, vif, param, val);
 178         ret = iwl_mvm_power_update_mac(mvm);
 179         mutex_unlock(&mvm->mutex);
 180
 181         return ret ?: count;
 182 }
 183
 184 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
 185                                         char __user *user_buf,
 186                                         size_t count, loff_t *ppos)
 187 {
 188         struct ieee80211_vif *vif = file->private_data;
 189         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 190         struct iwl_mvm *mvm = mvmvif->mvm;
 191         char buf[512];
 192         int bufsz = sizeof(buf);
 193         int pos;
 194
 195         pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz);
 196
 197         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 198 }
 199
 200 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 201                                          char __user *user_buf,
 202                                          size_t count, loff_t *ppos)
 203 {
 204         struct ieee80211_vif *vif = file->private_data;
 205         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 206         struct iwl_mvm *mvm = mvmvif->mvm;
 207         u8 ap_sta_id;
 208         struct ieee80211_chanctx_conf *chanctx_conf;
 209         char buf[512];
 210         int bufsz = sizeof(buf);
 211         int pos = 0;
 212         int i;
 213
 214         mutex_lock(&mvm->mutex);
 215
 216         ap_sta_id = mvmvif->ap_sta_id;
 217
 218         switch (ieee80211_vif_type_p2p(vif)) {
 219         case NL80211_IFTYPE_ADHOC:
 220                 pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n");
 221                 break;
 222         case NL80211_IFTYPE_STATION:
 223                 pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n");
 224                 break;
 225         case NL80211_IFTYPE_AP:
 226                 pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n");
 227                 break;
 228         case NL80211_IFTYPE_P2P_CLIENT:
 229                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n");
 230                 break;
 231         case NL80211_IFTYPE_P2P_GO:
 232                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n");
 233                 break;
 234         case NL80211_IFTYPE_P2P_DEVICE:
 235                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n");
 236                 break;
 237         default:
 238                 break;
 239         }
 240
 241         pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 242                          mvmvif->id, mvmvif->color);
 243         pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 244                          vif->bss_conf.bssid);
 245         pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 246         for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
 247                 pos += scnprintf(buf+pos, bufsz-pos,
 248                                  "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 249                                  i, mvmvif->queue_params[i].txop,
 250                                  mvmvif->queue_params[i].cw_min,
 251                                  mvmvif->queue_params[i].cw_max,
 252                                  mvmvif->queue_params[i].aifs,
 253                                  mvmvif->queue_params[i].uapsd);
 254
 255         if (vif->type == NL80211_IFTYPE_STATION &&
 256             ap_sta_id != IWL_MVM_STATION_COUNT) {
 257                 struct ieee80211_sta *sta;
 258
 259                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
 260                                                 lockdep_is_held(&mvm->mutex));
 261                 if (!IS_ERR_OR_NULL(sta)) {
 262                         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 263
 264                         pos += scnprintf(buf+pos, bufsz-pos,
 265                                          "ap_sta_id %d - reduced Tx power %d\n",
 266                                          ap_sta_id,
 267                                          mvm_sta->bt_reduced_txpower);
 268                 }
 269         }
 270
 271         rcu_read_lock();
 272         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 273         if (chanctx_conf)
 274                 pos += scnprintf(buf+pos, bufsz-pos,
 275                                  "idle rx chains %d, active rx chains: %d\n",
 276                                  chanctx_conf->rx_chains_static,
 277                                  chanctx_conf->rx_chains_dynamic);
 278         rcu_read_unlock();
 279
 280         mutex_unlock(&mvm->mutex);
 281
 282         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 283 }
 284
 285 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
 286                                 enum iwl_dbgfs_bf_mask param, int value)
 287 {
 288         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 289         struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
 290
 291         dbgfs_bf->mask |= param;
 292
 293         switch (param) {
 294         case MVM_DEBUGFS_BF_ENERGY_DELTA:
 295                 dbgfs_bf->bf_energy_delta = value;
 296                 break;
 297         case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
 298                 dbgfs_bf->bf_roaming_energy_delta = value;
 299                 break;
 300         case MVM_DEBUGFS_BF_ROAMING_STATE:
 301                 dbgfs_bf->bf_roaming_state = value;
 302                 break;
 303         case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
 304                 dbgfs_bf->bf_temp_threshold = value;
 305                 break;
 306         case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
 307                 dbgfs_bf->bf_temp_fast_filter = value;
 308                 break;
 309         case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
 310                 dbgfs_bf->bf_temp_slow_filter = value;
 311                 break;
 312         case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
 313                 dbgfs_bf->bf_enable_beacon_filter = value;
 314                 break;
 315         case MVM_DEBUGFS_BF_DEBUG_FLAG:
 316                 dbgfs_bf->bf_debug_flag = value;
 317                 break;
 318         case MVM_DEBUGFS_BF_ESCAPE_TIMER:
 319                 dbgfs_bf->bf_escape_timer = value;
 320                 break;
 321         case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
 322                 dbgfs_bf->ba_enable_beacon_abort = value;
 323                 break;
 324         case MVM_DEBUGFS_BA_ESCAPE_TIMER:
 325                 dbgfs_bf->ba_escape_timer = value;
 326                 break;
 327         }
 328 }
 329
 330 static ssize_t iwl_dbgfs_bf_params_write(struct ieee80211_vif *vif, char *buf,
 331                                          size_t count, loff_t *ppos)
 332 {
 333         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 334         struct iwl_mvm *mvm = mvmvif->mvm;
 335         enum iwl_dbgfs_bf_mask param;
 336         int value, ret = 0;
 337
 338         if (!strncmp("bf_energy_delta=", buf, 16)) {
 339                 if (sscanf(buf+16, "%d", &value) != 1)
 340                         return -EINVAL;
 341                 if (value < IWL_BF_ENERGY_DELTA_MIN ||
 342                     value > IWL_BF_ENERGY_DELTA_MAX)
 343                         return -EINVAL;
 344                 param = MVM_DEBUGFS_BF_ENERGY_DELTA;
 345         } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
 346                 if (sscanf(buf+24, "%d", &value) != 1)
 347                         return -EINVAL;
 348                 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
 349                     value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
 350                         return -EINVAL;
 351                 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
 352         } else if (!strncmp("bf_roaming_state=", buf, 17)) {
 353                 if (sscanf(buf+17, "%d", &value) != 1)
 354                         return -EINVAL;
 355                 if (value < IWL_BF_ROAMING_STATE_MIN ||
 356                     value > IWL_BF_ROAMING_STATE_MAX)
 357                         return -EINVAL;
 358                 param = MVM_DEBUGFS_BF_ROAMING_STATE;
 359         } else if (!strncmp("bf_temp_threshold=", buf, 18)) {
 360                 if (sscanf(buf+18, "%d", &value) != 1)
 361                         return -EINVAL;
 362                 if (value < IWL_BF_TEMP_THRESHOLD_MIN ||
 363                     value > IWL_BF_TEMP_THRESHOLD_MAX)
 364                         return -EINVAL;
 365                 param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
 366         } else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
 367                 if (sscanf(buf+20, "%d", &value) != 1)
 368                         return -EINVAL;
 369                 if (value < IWL_BF_TEMP_FAST_FILTER_MIN ||
 370                     value > IWL_BF_TEMP_FAST_FILTER_MAX)
 371                         return -EINVAL;
 372                 param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
 373         } else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
 374                 if (sscanf(buf+20, "%d", &value) != 1)
 375                         return -EINVAL;
 376                 if (value < IWL_BF_TEMP_SLOW_FILTER_MIN ||
 377                     value > IWL_BF_TEMP_SLOW_FILTER_MAX)
 378                         return -EINVAL;
 379                 param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
 380         } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
 381                 if (sscanf(buf+24, "%d", &value) != 1)
 382                         return -EINVAL;
 383                 if (value < 0 || value > 1)
 384                         return -EINVAL;
 385                 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
 386         } else if (!strncmp("bf_debug_flag=", buf, 14)) {
 387                 if (sscanf(buf+14, "%d", &value) != 1)
 388                         return -EINVAL;
 389                 if (value < 0 || value > 1)
 390                         return -EINVAL;
 391                 param = MVM_DEBUGFS_BF_DEBUG_FLAG;
 392         } else if (!strncmp("bf_escape_timer=", buf, 16)) {
 393                 if (sscanf(buf+16, "%d", &value) != 1)
 394                         return -EINVAL;
 395                 if (value < IWL_BF_ESCAPE_TIMER_MIN ||
 396                     value > IWL_BF_ESCAPE_TIMER_MAX)
 397                         return -EINVAL;
 398                 param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
 399         } else if (!strncmp("ba_escape_timer=", buf, 16)) {
 400                 if (sscanf(buf+16, "%d", &value) != 1)
 401                         return -EINVAL;
 402                 if (value < IWL_BA_ESCAPE_TIMER_MIN ||
 403                     value > IWL_BA_ESCAPE_TIMER_MAX)
 404                         return -EINVAL;
 405                 param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
 406         } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
 407                 if (sscanf(buf+23, "%d", &value) != 1)
 408                         return -EINVAL;
 409                 if (value < 0 || value > 1)
 410                         return -EINVAL;
 411                 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
 412         } else {
 413                 return -EINVAL;
 414         }
 415
 416         mutex_lock(&mvm->mutex);
 417         iwl_dbgfs_update_bf(vif, param, value);
 418         if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
 419                 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 420         else
 421                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
 422         mutex_unlock(&mvm->mutex);
 423
 424         return ret ?: count;
 425 }
 426
 427 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
 428                                         char __user *user_buf,
 429                                         size_t count, loff_t *ppos)
 430 {
 431         struct ieee80211_vif *vif = file->private_data;
 432         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 433         char buf[256];
 434         int pos = 0;
 435         const size_t bufsz = sizeof(buf);
 436         struct iwl_beacon_filter_cmd cmd = {
 437                 IWL_BF_CMD_CONFIG_DEFAULTS,
 438                 .bf_enable_beacon_filter =
 439                         cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
 440                 .ba_enable_beacon_abort =
 441                         cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
 442         };
 443
 444         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 445         if (mvmvif->bf_data.bf_enabled)
 446                 cmd.bf_enable_beacon_filter = cpu_to_le32(1);
 447         else
 448                 cmd.bf_enable_beacon_filter = 0;
 449
 450         pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
 451                          le32_to_cpu(cmd.bf_energy_delta));
 452         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
 453                          le32_to_cpu(cmd.bf_roaming_energy_delta));
 454         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
 455                          le32_to_cpu(cmd.bf_roaming_state));
 456         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
 457                          le32_to_cpu(cmd.bf_temp_threshold));
 458         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
 459                          le32_to_cpu(cmd.bf_temp_fast_filter));
 460         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
 461                          le32_to_cpu(cmd.bf_temp_slow_filter));
 462         pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
 463                          le32_to_cpu(cmd.bf_enable_beacon_filter));
 464         pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
 465                          le32_to_cpu(cmd.bf_debug_flag));
 466         pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
 467                          le32_to_cpu(cmd.bf_escape_timer));
 468         pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
 469                          le32_to_cpu(cmd.ba_escape_timer));
 470         pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
 471                          le32_to_cpu(cmd.ba_enable_beacon_abort));
 472
 473         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 474 }
 475
 476 static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
 477                                            size_t count, loff_t *ppos)
 478 {
 479         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 480         struct iwl_mvm *mvm = mvmvif->mvm;
 481         u8 value;
 482         int ret;
 483
 484         ret = kstrtou8(buf, 0, &value);
 485         if (ret)
 486                 return ret;
 487         if (value > 1)
 488                 return -EINVAL;
 489
 490         mutex_lock(&mvm->mutex);
 491         iwl_mvm_update_low_latency(mvm, vif, value);
 492         mutex_unlock(&mvm->mutex);
 493
 494         return count;
 495 }
 496
 497 static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
 498                                           char __user *user_buf,
 499                                           size_t count, loff_t *ppos)
 500 {
 501         struct ieee80211_vif *vif = file->private_data;
 502         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 503         char buf[3];
 504
 505         buf[0] = mvmvif->low_latency ? '1' : '0';
 506         buf[1] = '\n';
 507         buf[2] = '\0';
 508         return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof(buf));
 509 }
 510
 511 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
 512         _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 513 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
 514         _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 515 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {               \
 516                 if (!debugfs_create_file(#name, mode, parent, vif,      \
 517                                          &iwl_dbgfs_##name##_ops))      \
 518                         goto err;                                       \
 519         } while (0)
 520
 521 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 522 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
 523 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
 524 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
 525
 526 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 527 {
 528         struct dentry *dbgfs_dir = vif->debugfs_dir;
 529         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 530         char buf[100];
 531
 532         /*
 533          * Check if debugfs directory already exist before creating it.
 534          * This may happen when, for example, resetting hw or suspend-resume
 535          */
 536         if (!dbgfs_dir || mvmvif->dbgfs_dir)
 537                 return;
 538
 539         mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 540         mvmvif->mvm = mvm;
 541
 542         if (!mvmvif->dbgfs_dir) {
 543                 IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
 544                         dbgfs_dir->d_name.name);
 545                 return;
 546         }
 547
 548         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
 549             ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
 550              (vif->type == NL80211_IFTYPE_STATION && vif->p2p &&
 551               mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_DCM)))
 552                 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR |
 553                                          S_IRUSR);
 554
 555         MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, S_IRUSR);
 556         MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir,
 557                                  S_IRUSR | S_IWUSR);
 558
 559         if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 560             mvmvif == mvm->bf_allowed_vif)
 561                 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir,
 562                                          S_IRUSR | S_IWUSR);
 563
 564         /*
 565          * Create symlink for convenience pointing to interface specific
 566          * debugfs entries for the driver. For example, under
 567          * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
 568          * find
 569          * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
 570          */
 571         snprintf(buf, 100, "../../../%s/%s/%s/%s",
 572                  dbgfs_dir->d_parent->d_parent->d_name.name,
 573                  dbgfs_dir->d_parent->d_name.name,
 574                  dbgfs_dir->d_name.name,
 575                  mvmvif->dbgfs_dir->d_name.name);
 576
 577         mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
 578                                                      mvm->debugfs_dir, buf);
 579         if (!mvmvif->dbgfs_slink)
 580                 IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
 581                         dbgfs_dir->d_name.name);
 582         return;
 583 err:
 584         IWL_ERR(mvm, "Can't create debugfs entity\n");
 585 }
 586
 587 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 588 {
 589         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 590
 591         debugfs_remove(mvmvif->dbgfs_slink);
 592         mvmvif->dbgfs_slink = NULL;
 593
 594         debugfs_remove_recursive(mvmvif->dbgfs_dir);
 595         mvmvif->dbgfs_dir = NULL;
 596 }