drivers/net/wireless/intel/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  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called COPYING.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <linuxwifi@intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  * BSD LICENSE
  29  *
  30  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  31  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  32  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  *
  39  *  * Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  *  * Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in
  43  *    the documentation and/or other materials provided with the
  44  *    distribution.
  45  *  * Neither the name Intel Corporation nor the names of its
  46  *    contributors may be used to endorse or promote products derived
  47  *    from this software without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  50  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  51  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  52  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  53  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  54  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  55  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  56  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  57  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  58  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  59  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  60  *
  61  *****************************************************************************/
  62 #include "mvm.h"
  63 #include "debugfs.h"
  64
  65 static void iwl_dbgfs_update_pm(struct iwl_mvm *mvm,
  66                                  struct ieee80211_vif *vif,
  67                                  enum iwl_dbgfs_pm_mask param, int val)
  68 {
  69         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  70         struct iwl_dbgfs_pm *dbgfs_pm = &mvmvif->dbgfs_pm;
  71
  72         dbgfs_pm->mask |= param;
  73
  74         switch (param) {
  75         case MVM_DEBUGFS_PM_KEEP_ALIVE: {
  76                 int dtimper = vif->bss_conf.dtim_period ?: 1;
  77                 int dtimper_msec = dtimper * vif->bss_conf.beacon_int;
  78
  79                 IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val);
  80                 if (val * MSEC_PER_SEC < 3 * dtimper_msec)
  81                         IWL_WARN(mvm,
  82                                  "debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n",
  83                                  val * MSEC_PER_SEC, 3 * dtimper_msec);
  84                 dbgfs_pm->keep_alive_seconds = val;
  85                 break;
  86         }
  87         case MVM_DEBUGFS_PM_SKIP_OVER_DTIM:
  88                 IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n",
  89                                 val ? "enabled" : "disabled");
  90                 dbgfs_pm->skip_over_dtim = val;
  91                 break;
  92         case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS:
  93                 IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val);
  94                 dbgfs_pm->skip_dtim_periods = val;
  95                 break;
  96         case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT:
  97                 IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val);
  98                 dbgfs_pm->rx_data_timeout = val;
  99                 break;
 100         case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT:
 101                 IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val);
 102                 dbgfs_pm->tx_data_timeout = val;
 103                 break;
 104         case MVM_DEBUGFS_PM_LPRX_ENA:
 105                 IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
 106                 dbgfs_pm->lprx_ena = val;
 107                 break;
 108         case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
 109                 IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
 110                 dbgfs_pm->lprx_rssi_threshold = val;
 111                 break;
 112         case MVM_DEBUGFS_PM_SNOOZE_ENABLE:
 113                 IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val);
 114                 dbgfs_pm->snooze_ena = val;
 115                 break;
 116         case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING:
 117                 IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val);
 118                 dbgfs_pm->uapsd_misbehaving = val;
 119                 break;
 120         case MVM_DEBUGFS_PM_USE_PS_POLL:
 121                 IWL_DEBUG_POWER(mvm, "use_ps_poll=%d\n", val);
 122                 dbgfs_pm->use_ps_poll = val;
 123                 break;
 124         }
 125 }
 126
 127 static ssize_t iwl_dbgfs_pm_params_write(struct ieee80211_vif *vif, char *buf,
 128                                          size_t count, loff_t *ppos)
 129 {
 130         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 131         struct iwl_mvm *mvm = mvmvif->mvm;
 132         enum iwl_dbgfs_pm_mask param;
 133         int val, ret;
 134
 135         if (!strncmp("keep_alive=", buf, 11)) {
 136                 if (sscanf(buf + 11, "%d", &val) != 1)
 137                         return -EINVAL;
 138                 param = MVM_DEBUGFS_PM_KEEP_ALIVE;
 139         } else if (!strncmp("skip_over_dtim=", buf, 15)) {
 140                 if (sscanf(buf + 15, "%d", &val) != 1)
 141                         return -EINVAL;
 142                 param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
 143         } else if (!strncmp("skip_dtim_periods=", buf, 18)) {
 144                 if (sscanf(buf + 18, "%d", &val) != 1)
 145                         return -EINVAL;
 146                 param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
 147         } else if (!strncmp("rx_data_timeout=", buf, 16)) {
 148                 if (sscanf(buf + 16, "%d", &val) != 1)
 149                         return -EINVAL;
 150                 param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
 151         } else if (!strncmp("tx_data_timeout=", buf, 16)) {
 152                 if (sscanf(buf + 16, "%d", &val) != 1)
 153                         return -EINVAL;
 154                 param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
 155         } else if (!strncmp("lprx=", buf, 5)) {
 156                 if (sscanf(buf + 5, "%d", &val) != 1)
 157                         return -EINVAL;
 158                 param = MVM_DEBUGFS_PM_LPRX_ENA;
 159         } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
 160                 if (sscanf(buf + 20, "%d", &val) != 1)
 161                         return -EINVAL;
 162                 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
 163                     POWER_LPRX_RSSI_THRESHOLD_MIN)
 164                         return -EINVAL;
 165                 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
 166         } else if (!strncmp("snooze_enable=", buf, 14)) {
 167                 if (sscanf(buf + 14, "%d", &val) != 1)
 168                         return -EINVAL;
 169                 param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
 170         } else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
 171                 if (sscanf(buf + 18, "%d", &val) != 1)
 172                         return -EINVAL;
 173                 param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
 174         } else if (!strncmp("use_ps_poll=", buf, 12)) {
 175                 if (sscanf(buf + 12, "%d", &val) != 1)
 176                         return -EINVAL;
 177                 param = MVM_DEBUGFS_PM_USE_PS_POLL;
 178         } else {
 179                 return -EINVAL;
 180         }
 181
 182         mutex_lock(&mvm->mutex);
 183         iwl_dbgfs_update_pm(mvm, vif, param, val);
 184         ret = iwl_mvm_power_update_mac(mvm);
 185         mutex_unlock(&mvm->mutex);
 186
 187         return ret ?: count;
 188 }
 189
 190 static ssize_t iwl_dbgfs_tx_pwr_lmt_read(struct file *file,
 191                                          char __user *user_buf,
 192                                          size_t count, loff_t *ppos)
 193 {
 194         struct ieee80211_vif *vif = file->private_data;
 195         char buf[64];
 196         int bufsz = sizeof(buf);
 197         int pos;
 198
 199         pos = scnprintf(buf, bufsz, "bss limit = %d\n",
 200                         vif->bss_conf.txpower);
 201
 202         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 203 }
 204
 205 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
 206                                         char __user *user_buf,
 207                                         size_t count, loff_t *ppos)
 208 {
 209         struct ieee80211_vif *vif = file->private_data;
 210         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 211         struct iwl_mvm *mvm = mvmvif->mvm;
 212         char buf[512];
 213         int bufsz = sizeof(buf);
 214         int pos;
 215
 216         pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz);
 217
 218         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 219 }
 220
 221 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 222                                          char __user *user_buf,
 223                                          size_t count, loff_t *ppos)
 224 {
 225         struct ieee80211_vif *vif = file->private_data;
 226         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 227         struct iwl_mvm *mvm = mvmvif->mvm;
 228         u8 ap_sta_id;
 229         struct ieee80211_chanctx_conf *chanctx_conf;
 230         char buf[512];
 231         int bufsz = sizeof(buf);
 232         int pos = 0;
 233         int i;
 234
 235         mutex_lock(&mvm->mutex);
 236
 237         ap_sta_id = mvmvif->ap_sta_id;
 238
 239         switch (ieee80211_vif_type_p2p(vif)) {
 240         case NL80211_IFTYPE_ADHOC:
 241                 pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n");
 242                 break;
 243         case NL80211_IFTYPE_STATION:
 244                 pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n");
 245                 break;
 246         case NL80211_IFTYPE_AP:
 247                 pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n");
 248                 break;
 249         case NL80211_IFTYPE_P2P_CLIENT:
 250                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n");
 251                 break;
 252         case NL80211_IFTYPE_P2P_GO:
 253                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n");
 254                 break;
 255         case NL80211_IFTYPE_P2P_DEVICE:
 256                 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n");
 257                 break;
 258         default:
 259                 break;
 260         }
 261
 262         pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 263                          mvmvif->id, mvmvif->color);
 264         pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 265                          vif->bss_conf.bssid);
 266         pos += scnprintf(buf+pos, bufsz-pos, "Load: %d\n",
 267                          mvm->tcm.result.load[mvmvif->id]);
 268         pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 269         for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
 270                 pos += scnprintf(buf+pos, bufsz-pos,
 271                                  "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 272                                  i, mvmvif->queue_params[i].txop,
 273                                  mvmvif->queue_params[i].cw_min,
 274                                  mvmvif->queue_params[i].cw_max,
 275                                  mvmvif->queue_params[i].aifs,
 276                                  mvmvif->queue_params[i].uapsd);
 277
 278         if (vif->type == NL80211_IFTYPE_STATION &&
 279             ap_sta_id != IWL_MVM_INVALID_STA) {
 280                 struct iwl_mvm_sta *mvm_sta;
 281
 282                 mvm_sta = iwl_mvm_sta_from_staid_protected(mvm, ap_sta_id);
 283                 if (mvm_sta) {
 284                         pos += scnprintf(buf+pos, bufsz-pos,
 285                                          "ap_sta_id %d - reduced Tx power %d\n",
 286                                          ap_sta_id,
 287                                          mvm_sta->bt_reduced_txpower);
 288                 }
 289         }
 290
 291         rcu_read_lock();
 292         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 293         if (chanctx_conf)
 294                 pos += scnprintf(buf+pos, bufsz-pos,
 295                                  "idle rx chains %d, active rx chains: %d\n",
 296                                  chanctx_conf->rx_chains_static,
 297                                  chanctx_conf->rx_chains_dynamic);
 298         rcu_read_unlock();
 299
 300         mutex_unlock(&mvm->mutex);
 301
 302         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 303 }
 304
 305 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
 306                                 enum iwl_dbgfs_bf_mask param, int value)
 307 {
 308         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 309         struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
 310
 311         dbgfs_bf->mask |= param;
 312
 313         switch (param) {
 314         case MVM_DEBUGFS_BF_ENERGY_DELTA:
 315                 dbgfs_bf->bf_energy_delta = value;
 316                 break;
 317         case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
 318                 dbgfs_bf->bf_roaming_energy_delta = value;
 319                 break;
 320         case MVM_DEBUGFS_BF_ROAMING_STATE:
 321                 dbgfs_bf->bf_roaming_state = value;
 322                 break;
 323         case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
 324                 dbgfs_bf->bf_temp_threshold = value;
 325                 break;
 326         case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
 327                 dbgfs_bf->bf_temp_fast_filter = value;
 328                 break;
 329         case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
 330                 dbgfs_bf->bf_temp_slow_filter = value;
 331                 break;
 332         case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
 333                 dbgfs_bf->bf_enable_beacon_filter = value;
 334                 break;
 335         case MVM_DEBUGFS_BF_DEBUG_FLAG:
 336                 dbgfs_bf->bf_debug_flag = value;
 337                 break;
 338         case MVM_DEBUGFS_BF_ESCAPE_TIMER:
 339                 dbgfs_bf->bf_escape_timer = value;
 340                 break;
 341         case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
 342                 dbgfs_bf->ba_enable_beacon_abort = value;
 343                 break;
 344         case MVM_DEBUGFS_BA_ESCAPE_TIMER:
 345                 dbgfs_bf->ba_escape_timer = value;
 346                 break;
 347         }
 348 }
 349
 350 static ssize_t iwl_dbgfs_bf_params_write(struct ieee80211_vif *vif, char *buf,
 351                                          size_t count, loff_t *ppos)
 352 {
 353         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 354         struct iwl_mvm *mvm = mvmvif->mvm;
 355         enum iwl_dbgfs_bf_mask param;
 356         int value, ret = 0;
 357
 358         if (!strncmp("bf_energy_delta=", buf, 16)) {
 359                 if (sscanf(buf+16, "%d", &value) != 1)
 360                         return -EINVAL;
 361                 if (value < IWL_BF_ENERGY_DELTA_MIN ||
 362                     value > IWL_BF_ENERGY_DELTA_MAX)
 363                         return -EINVAL;
 364                 param = MVM_DEBUGFS_BF_ENERGY_DELTA;
 365         } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
 366                 if (sscanf(buf+24, "%d", &value) != 1)
 367                         return -EINVAL;
 368                 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
 369                     value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
 370                         return -EINVAL;
 371                 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
 372         } else if (!strncmp("bf_roaming_state=", buf, 17)) {
 373                 if (sscanf(buf+17, "%d", &value) != 1)
 374                         return -EINVAL;
 375                 if (value < IWL_BF_ROAMING_STATE_MIN ||
 376                     value > IWL_BF_ROAMING_STATE_MAX)
 377                         return -EINVAL;
 378                 param = MVM_DEBUGFS_BF_ROAMING_STATE;
 379         } else if (!strncmp("bf_temp_threshold=", buf, 18)) {
 380                 if (sscanf(buf+18, "%d", &value) != 1)
 381                         return -EINVAL;
 382                 if (value < IWL_BF_TEMP_THRESHOLD_MIN ||
 383                     value > IWL_BF_TEMP_THRESHOLD_MAX)
 384                         return -EINVAL;
 385                 param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
 386         } else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
 387                 if (sscanf(buf+20, "%d", &value) != 1)
 388                         return -EINVAL;
 389                 if (value < IWL_BF_TEMP_FAST_FILTER_MIN ||
 390                     value > IWL_BF_TEMP_FAST_FILTER_MAX)
 391                         return -EINVAL;
 392                 param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
 393         } else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
 394                 if (sscanf(buf+20, "%d", &value) != 1)
 395                         return -EINVAL;
 396                 if (value < IWL_BF_TEMP_SLOW_FILTER_MIN ||
 397                     value > IWL_BF_TEMP_SLOW_FILTER_MAX)
 398                         return -EINVAL;
 399                 param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
 400         } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
 401                 if (sscanf(buf+24, "%d", &value) != 1)
 402                         return -EINVAL;
 403                 if (value < 0 || value > 1)
 404                         return -EINVAL;
 405                 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
 406         } else if (!strncmp("bf_debug_flag=", buf, 14)) {
 407                 if (sscanf(buf+14, "%d", &value) != 1)
 408                         return -EINVAL;
 409                 if (value < 0 || value > 1)
 410                         return -EINVAL;
 411                 param = MVM_DEBUGFS_BF_DEBUG_FLAG;
 412         } else if (!strncmp("bf_escape_timer=", buf, 16)) {
 413                 if (sscanf(buf+16, "%d", &value) != 1)
 414                         return -EINVAL;
 415                 if (value < IWL_BF_ESCAPE_TIMER_MIN ||
 416                     value > IWL_BF_ESCAPE_TIMER_MAX)
 417                         return -EINVAL;
 418                 param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
 419         } else if (!strncmp("ba_escape_timer=", buf, 16)) {
 420                 if (sscanf(buf+16, "%d", &value) != 1)
 421                         return -EINVAL;
 422                 if (value < IWL_BA_ESCAPE_TIMER_MIN ||
 423                     value > IWL_BA_ESCAPE_TIMER_MAX)
 424                         return -EINVAL;
 425                 param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
 426         } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
 427                 if (sscanf(buf+23, "%d", &value) != 1)
 428                         return -EINVAL;
 429                 if (value < 0 || value > 1)
 430                         return -EINVAL;
 431                 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
 432         } else {
 433                 return -EINVAL;
 434         }
 435
 436         mutex_lock(&mvm->mutex);
 437         iwl_dbgfs_update_bf(vif, param, value);
 438         if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
 439                 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 440         else
 441                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
 442         mutex_unlock(&mvm->mutex);
 443
 444         return ret ?: count;
 445 }
 446
 447 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
 448                                         char __user *user_buf,
 449                                         size_t count, loff_t *ppos)
 450 {
 451         struct ieee80211_vif *vif = file->private_data;
 452         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 453         char buf[256];
 454         int pos = 0;
 455         const size_t bufsz = sizeof(buf);
 456         struct iwl_beacon_filter_cmd cmd = {
 457                 IWL_BF_CMD_CONFIG_DEFAULTS,
 458                 .bf_enable_beacon_filter =
 459                         cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
 460                 .ba_enable_beacon_abort =
 461                         cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
 462         };
 463
 464         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 465         if (mvmvif->bf_data.bf_enabled)
 466                 cmd.bf_enable_beacon_filter = cpu_to_le32(1);
 467         else
 468                 cmd.bf_enable_beacon_filter = 0;
 469
 470         pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
 471                          le32_to_cpu(cmd.bf_energy_delta));
 472         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
 473                          le32_to_cpu(cmd.bf_roaming_energy_delta));
 474         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
 475                          le32_to_cpu(cmd.bf_roaming_state));
 476         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
 477                          le32_to_cpu(cmd.bf_temp_threshold));
 478         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
 479                          le32_to_cpu(cmd.bf_temp_fast_filter));
 480         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
 481                          le32_to_cpu(cmd.bf_temp_slow_filter));
 482         pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
 483                          le32_to_cpu(cmd.bf_enable_beacon_filter));
 484         pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
 485                          le32_to_cpu(cmd.bf_debug_flag));
 486         pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
 487                          le32_to_cpu(cmd.bf_escape_timer));
 488         pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
 489                          le32_to_cpu(cmd.ba_escape_timer));
 490         pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
 491                          le32_to_cpu(cmd.ba_enable_beacon_abort));
 492
 493         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 494 }
 495
 496 static inline char *iwl_dbgfs_is_match(char *name, char *buf)
 497 {
 498         int len = strlen(name);
 499
 500         return !strncmp(name, buf, len) ? buf + len : NULL;
 501 }
 502
 503 static ssize_t iwl_dbgfs_os_device_timediff_read(struct file *file,
 504                                                  char __user *user_buf,
 505                                                  size_t count, loff_t *ppos)
 506 {
 507         struct ieee80211_vif *vif = file->private_data;
 508         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 509         struct iwl_mvm *mvm = mvmvif->mvm;
 510         u32 curr_gp2;
 511         u64 curr_os;
 512         s64 diff;
 513         char buf[64];
 514         const size_t bufsz = sizeof(buf);
 515         int pos = 0;
 516
 517         iwl_mvm_get_sync_time(mvm, &curr_gp2, &curr_os);
 518         do_div(curr_os, NSEC_PER_USEC);
 519         diff = curr_os - curr_gp2;
 520         pos += scnprintf(buf + pos, bufsz - pos, "diff=%lld\n", diff);
 521
 522         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 523 }
 524
 525 static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
 526                                            size_t count, loff_t *ppos)
 527 {
 528         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 529         struct iwl_mvm *mvm = mvmvif->mvm;
 530         u8 value;
 531         int ret;
 532
 533         ret = kstrtou8(buf, 0, &value);
 534         if (ret)
 535                 return ret;
 536         if (value > 1)
 537                 return -EINVAL;
 538
 539         mutex_lock(&mvm->mutex);
 540         iwl_mvm_update_low_latency(mvm, vif, value, LOW_LATENCY_DEBUGFS);
 541         mutex_unlock(&mvm->mutex);
 542
 543         return count;
 544 }
 545
 546 static ssize_t
 547 iwl_dbgfs_low_latency_force_write(struct ieee80211_vif *vif, char *buf,
 548                                   size_t count, loff_t *ppos)
 549 {
 550         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 551         struct iwl_mvm *mvm = mvmvif->mvm;
 552         u8 value;
 553         int ret;
 554
 555         ret = kstrtou8(buf, 0, &value);
 556         if (ret)
 557                 return ret;
 558
 559         if (value > NUM_LOW_LATENCY_FORCE)
 560                 return -EINVAL;
 561
 562         mutex_lock(&mvm->mutex);
 563         if (value == LOW_LATENCY_FORCE_UNSET) {
 564                 iwl_mvm_update_low_latency(mvm, vif, false,
 565                                            LOW_LATENCY_DEBUGFS_FORCE);
 566                 iwl_mvm_update_low_latency(mvm, vif, false,
 567                                            LOW_LATENCY_DEBUGFS_FORCE_ENABLE);
 568         } else {
 569                 iwl_mvm_update_low_latency(mvm, vif,
 570                                            value == LOW_LATENCY_FORCE_ON,
 571                                            LOW_LATENCY_DEBUGFS_FORCE);
 572                 iwl_mvm_update_low_latency(mvm, vif, true,
 573                                            LOW_LATENCY_DEBUGFS_FORCE_ENABLE);
 574         }
 575         mutex_unlock(&mvm->mutex);
 576         return count;
 577 }
 578
 579 static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
 580                                           char __user *user_buf,
 581                                           size_t count, loff_t *ppos)
 582 {
 583         struct ieee80211_vif *vif = file->private_data;
 584         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 585         char format[] = "traffic=%d\ndbgfs=%d\nvcmd=%d\nvif_type=%d\n"
 586                         "dbgfs_force_enable=%d\ndbgfs_force=%d\nactual=%d\n";
 587
 588         /*
 589          * all values in format are boolean so the size of format is enough
 590          * for holding the result string
 591          */
 592         char buf[sizeof(format) + 1] = {};
 593         int len;
 594
 595         len = scnprintf(buf, sizeof(buf) - 1, format,
 596                         !!(mvmvif->low_latency & LOW_LATENCY_TRAFFIC),
 597                         !!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS),
 598                         !!(mvmvif->low_latency & LOW_LATENCY_VCMD),
 599                         !!(mvmvif->low_latency & LOW_LATENCY_VIF_TYPE),
 600                         !!(mvmvif->low_latency &
 601                            LOW_LATENCY_DEBUGFS_FORCE_ENABLE),
 602                         !!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS_FORCE),
 603                         !!(mvmvif->low_latency_actual));
 604         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 605 }
 606
 607 static ssize_t iwl_dbgfs_uapsd_misbehaving_read(struct file *file,
 608                                                 char __user *user_buf,
 609                                                 size_t count, loff_t *ppos)
 610 {
 611         struct ieee80211_vif *vif = file->private_data;
 612         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 613         char buf[20];
 614         int len;
 615
 616         len = sprintf(buf, "%pM\n", mvmvif->uapsd_misbehaving_bssid);
 617         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 618 }
 619
 620 static ssize_t iwl_dbgfs_uapsd_misbehaving_write(struct ieee80211_vif *vif,
 621                                                  char *buf, size_t count,
 622                                                  loff_t *ppos)
 623 {
 624         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 625         struct iwl_mvm *mvm = mvmvif->mvm;
 626         bool ret;
 627
 628         mutex_lock(&mvm->mutex);
 629         ret = mac_pton(buf, mvmvif->uapsd_misbehaving_bssid);
 630         mutex_unlock(&mvm->mutex);
 631
 632         return ret ? count : -EINVAL;
 633 }
 634
 635 static ssize_t iwl_dbgfs_rx_phyinfo_write(struct ieee80211_vif *vif, char *buf,
 636                                           size_t count, loff_t *ppos)
 637 {
 638         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 639         struct iwl_mvm *mvm = mvmvif->mvm;
 640         struct ieee80211_chanctx_conf *chanctx_conf;
 641         struct iwl_mvm_phy_ctxt *phy_ctxt;
 642         u16 value;
 643         int ret;
 644
 645         ret = kstrtou16(buf, 0, &value);
 646         if (ret)
 647                 return ret;
 648
 649         mutex_lock(&mvm->mutex);
 650         rcu_read_lock();
 651
 652         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 653         /* make sure the channel context is assigned */
 654         if (!chanctx_conf) {
 655                 rcu_read_unlock();
 656                 mutex_unlock(&mvm->mutex);
 657                 return -EINVAL;
 658         }
 659
 660         phy_ctxt = &mvm->phy_ctxts[*(u16 *)chanctx_conf->drv_priv];
 661         rcu_read_unlock();
 662
 663         mvm->dbgfs_rx_phyinfo = value;
 664
 665         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chanctx_conf->min_def,
 666                                        chanctx_conf->rx_chains_static,
 667                                        chanctx_conf->rx_chains_dynamic);
 668         mutex_unlock(&mvm->mutex);
 669
 670         return ret ?: count;
 671 }
 672
 673 static ssize_t iwl_dbgfs_rx_phyinfo_read(struct file *file,
 674                                          char __user *user_buf,
 675                                          size_t count, loff_t *ppos)
 676 {
 677         struct ieee80211_vif *vif = file->private_data;
 678         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 679         char buf[8];
 680         int len;
 681
 682         len = scnprintf(buf, sizeof(buf), "0x%04x\n",
 683                         mvmvif->mvm->dbgfs_rx_phyinfo);
 684
 685         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 686 }
 687
 688 static void iwl_dbgfs_quota_check(void *data, u8 *mac,
 689                                   struct ieee80211_vif *vif)
 690 {
 691         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 692         int *ret = data;
 693
 694         if (mvmvif->dbgfs_quota_min)
 695                 *ret = -EINVAL;
 696 }
 697
 698 static ssize_t iwl_dbgfs_quota_min_write(struct ieee80211_vif *vif, char *buf,
 699                                          size_t count, loff_t *ppos)
 700 {
 701         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 702         struct iwl_mvm *mvm = mvmvif->mvm;
 703         u16 value;
 704         int ret;
 705
 706         ret = kstrtou16(buf, 0, &value);
 707         if (ret)
 708                 return ret;
 709
 710         if (value > 95)
 711                 return -EINVAL;
 712
 713         mutex_lock(&mvm->mutex);
 714
 715         mvmvif->dbgfs_quota_min = 0;
 716         ieee80211_iterate_interfaces(mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 717                                      iwl_dbgfs_quota_check, &ret);
 718         if (ret == 0) {
 719                 mvmvif->dbgfs_quota_min = value;
 720                 iwl_mvm_update_quotas(mvm, false, NULL);
 721         }
 722         mutex_unlock(&mvm->mutex);
 723
 724         return ret ?: count;
 725 }
 726
 727 static ssize_t iwl_dbgfs_quota_min_read(struct file *file,
 728                                         char __user *user_buf,
 729                                         size_t count, loff_t *ppos)
 730 {
 731         struct ieee80211_vif *vif = file->private_data;
 732         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 733         char buf[10];
 734         int len;
 735
 736         len = scnprintf(buf, sizeof(buf), "%d\n", mvmvif->dbgfs_quota_min);
 737
 738         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 739 }
 740
 741 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
 742         _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 743 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
 744         _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 745 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {               \
 746                 if (!debugfs_create_file(#name, mode, parent, vif,      \
 747                                          &iwl_dbgfs_##name##_ops))      \
 748                         goto err;                                       \
 749         } while (0)
 750
 751 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 752 MVM_DEBUGFS_READ_FILE_OPS(tx_pwr_lmt);
 753 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
 754 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
 755 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
 756 MVM_DEBUGFS_WRITE_FILE_OPS(low_latency_force, 10);
 757 MVM_DEBUGFS_READ_WRITE_FILE_OPS(uapsd_misbehaving, 20);
 758 MVM_DEBUGFS_READ_WRITE_FILE_OPS(rx_phyinfo, 10);
 759 MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32);
 760 MVM_DEBUGFS_READ_FILE_OPS(os_device_timediff);
 761
 762
 763 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 764 {
 765         struct dentry *dbgfs_dir = vif->debugfs_dir;
 766         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 767         char buf[100];
 768
 769         /*
 770          * Check if debugfs directory already exist before creating it.
 771          * This may happen when, for example, resetting hw or suspend-resume
 772          */
 773         if (!dbgfs_dir || mvmvif->dbgfs_dir)
 774                 return;
 775
 776         mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 777         if (IS_ERR_OR_NULL(mvmvif->dbgfs_dir)) {
 778                 IWL_ERR(mvm, "Failed to create debugfs directory under %pd\n",
 779                         dbgfs_dir);
 780                 return;
 781         }
 782
 783         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
 784             ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
 785              (vif->type == NL80211_IFTYPE_STATION && vif->p2p)))
 786                 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, 0600);
 787
 788         MVM_DEBUGFS_ADD_FILE_VIF(tx_pwr_lmt, mvmvif->dbgfs_dir, 0400);
 789         MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, 0400);
 790         MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir, 0600);
 791         MVM_DEBUGFS_ADD_FILE_VIF(low_latency_force, mvmvif->dbgfs_dir, 0600);
 792         MVM_DEBUGFS_ADD_FILE_VIF(uapsd_misbehaving, mvmvif->dbgfs_dir, 0600);
 793         MVM_DEBUGFS_ADD_FILE_VIF(rx_phyinfo, mvmvif->dbgfs_dir, 0600);
 794         MVM_DEBUGFS_ADD_FILE_VIF(quota_min, mvmvif->dbgfs_dir, 0600);
 795         MVM_DEBUGFS_ADD_FILE_VIF(os_device_timediff, mvmvif->dbgfs_dir, 0400);
 796
 797         if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 798             mvmvif == mvm->bf_allowed_vif)
 799                 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir, 0600);
 800
 801         /*
 802          * Create symlink for convenience pointing to interface specific
 803          * debugfs entries for the driver. For example, under
 804          * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
 805          * find
 806          * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
 807          */
 808         snprintf(buf, 100, "../../../%pd3/%pd",
 809                  dbgfs_dir,
 810                  mvmvif->dbgfs_dir);
 811
 812         mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
 813                                                      mvm->debugfs_dir, buf);
 814         if (!mvmvif->dbgfs_slink)
 815                 IWL_ERR(mvm, "Can't create debugfs symbolic link under %pd\n",
 816                         dbgfs_dir);
 817         return;
 818 err:
 819         IWL_ERR(mvm, "Can't create debugfs entity\n");
 820 }
 821
 822 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 823 {
 824         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 825
 826         debugfs_remove(mvmvif->dbgfs_slink);
 827         mvmvif->dbgfs_slink = NULL;
 828
 829         debugfs_remove_recursive(mvmvif->dbgfs_dir);
 830         mvmvif->dbgfs_dir = NULL;
 831 }