Pileus Git - ~andy/linux/blob - 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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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  30  *
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  32  *
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  41  *    notice, this list of conditions and the following disclaimer.
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  44  *    the documentation and/or other materials provided with the
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
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  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_DISABLE_POWER_OFF:
 107                 IWL_DEBUG_POWER(mvm, "disable_power_off=%d\n", val);
 108                 dbgfs_pm->disable_power_off = val;
 109                 break;
 110         case MVM_DEBUGFS_PM_LPRX_ENA:
 111                 IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
 112                 dbgfs_pm->lprx_ena = val;
 113                 break;
 114         case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
 115                 IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
 116                 dbgfs_pm->lprx_rssi_threshold = val;
 117                 break;
 118         case MVM_DEBUGFS_PM_SNOOZE_ENABLE:
 119                 IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val);
 120                 dbgfs_pm->snooze_ena = val;
 121                 break;
 122         case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING:
 123                 IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val);
 124                 dbgfs_pm->uapsd_misbehaving = val;
 125                 break;
 126         }
 127 }
 128
 129 static ssize_t iwl_dbgfs_pm_params_write(struct ieee80211_vif *vif, char *buf,
 130                                          size_t count, loff_t *ppos)
 131 {
 132         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 133         struct iwl_mvm *mvm = mvmvif->mvm;
 134         enum iwl_dbgfs_pm_mask param;
 135         int val, ret;
 136
 137         if (!strncmp("keep_alive=", buf, 11)) {
 138                 if (sscanf(buf + 11, "%d", &val) != 1)
 139                         return -EINVAL;
 140                 param = MVM_DEBUGFS_PM_KEEP_ALIVE;
 141         } else if (!strncmp("skip_over_dtim=", buf, 15)) {
 142                 if (sscanf(buf + 15, "%d", &val) != 1)
 143                         return -EINVAL;
 144                 param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
 145         } else if (!strncmp("skip_dtim_periods=", buf, 18)) {
 146                 if (sscanf(buf + 18, "%d", &val) != 1)
 147                         return -EINVAL;
 148                 param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
 149         } else if (!strncmp("rx_data_timeout=", buf, 16)) {
 150                 if (sscanf(buf + 16, "%d", &val) != 1)
 151                         return -EINVAL;
 152                 param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
 153         } else if (!strncmp("tx_data_timeout=", buf, 16)) {
 154                 if (sscanf(buf + 16, "%d", &val) != 1)
 155                         return -EINVAL;
 156                 param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
 157         } else if (!strncmp("disable_power_off=", buf, 18) &&
 158                    !(mvm->fw->ucode_capa.flags &
 159                      IWL_UCODE_TLV_FLAGS_DEVICE_PS_CMD)) {
 160                 if (sscanf(buf + 18, "%d", &val) != 1)
 161                         return -EINVAL;
 162                 param = MVM_DEBUGFS_PM_DISABLE_POWER_OFF;
 163         } else if (!strncmp("lprx=", buf, 5)) {
 164                 if (sscanf(buf + 5, "%d", &val) != 1)
 165                         return -EINVAL;
 166                 param = MVM_DEBUGFS_PM_LPRX_ENA;
 167         } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
 168                 if (sscanf(buf + 20, "%d", &val) != 1)
 169                         return -EINVAL;
 170                 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
 171                     POWER_LPRX_RSSI_THRESHOLD_MIN)
 172                         return -EINVAL;
 173                 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
 174         } else if (!strncmp("snooze_enable=", buf, 14)) {
 175                 if (sscanf(buf + 14, "%d", &val) != 1)
 176                         return -EINVAL;
 177                 param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
 178         } else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
 179                 if (sscanf(buf + 18, "%d", &val) != 1)
 180                         return -EINVAL;
 181                 param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
 182         } else {
 183                 return -EINVAL;
 184         }
 185
 186         mutex_lock(&mvm->mutex);
 187         iwl_dbgfs_update_pm(mvm, vif, param, val);
 188         ret = iwl_mvm_power_update_mode(mvm, vif);
 189         mutex_unlock(&mvm->mutex);
 190
 191         return ret ?: count;
 192 }
 193
 194 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
 195                                         char __user *user_buf,
 196                                         size_t count, loff_t *ppos)
 197 {
 198         struct ieee80211_vif *vif = file->private_data;
 199         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 200         struct iwl_mvm *mvm = mvmvif->mvm;
 201         char buf[512];
 202         int bufsz = sizeof(buf);
 203         int pos;
 204
 205         pos = iwl_mvm_power_dbgfs_read(mvm, vif, buf, bufsz);
 206
 207         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 208 }
 209
 210 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 211                                          char __user *user_buf,
 212                                          size_t count, loff_t *ppos)
 213 {
 214         struct ieee80211_vif *vif = file->private_data;
 215         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 216         struct iwl_mvm *mvm = mvmvif->mvm;
 217         u8 ap_sta_id;
 218         struct ieee80211_chanctx_conf *chanctx_conf;
 219         char buf[512];
 220         int bufsz = sizeof(buf);
 221         int pos = 0;
 222         int i;
 223
 224         mutex_lock(&mvm->mutex);
 225
 226         ap_sta_id = mvmvif->ap_sta_id;
 227
 228         pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 229                          mvmvif->id, mvmvif->color);
 230         pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 231                          vif->bss_conf.bssid);
 232         pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 233         for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
 234                 pos += scnprintf(buf+pos, bufsz-pos,
 235                                  "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 236                                  i, mvmvif->queue_params[i].txop,
 237                                  mvmvif->queue_params[i].cw_min,
 238                                  mvmvif->queue_params[i].cw_max,
 239                                  mvmvif->queue_params[i].aifs,
 240                                  mvmvif->queue_params[i].uapsd);
 241
 242         if (vif->type == NL80211_IFTYPE_STATION &&
 243             ap_sta_id != IWL_MVM_STATION_COUNT) {
 244                 struct ieee80211_sta *sta;
 245
 246                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
 247                                                 lockdep_is_held(&mvm->mutex));
 248                 if (!IS_ERR_OR_NULL(sta)) {
 249                         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 250
 251                         pos += scnprintf(buf+pos, bufsz-pos,
 252                                          "ap_sta_id %d - reduced Tx power %d\n",
 253                                          ap_sta_id,
 254                                          mvm_sta->bt_reduced_txpower);
 255                 }
 256         }
 257
 258         rcu_read_lock();
 259         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 260         if (chanctx_conf)
 261                 pos += scnprintf(buf+pos, bufsz-pos,
 262                                  "idle rx chains %d, active rx chains: %d\n",
 263                                  chanctx_conf->rx_chains_static,
 264                                  chanctx_conf->rx_chains_dynamic);
 265         rcu_read_unlock();
 266
 267         mutex_unlock(&mvm->mutex);
 268
 269         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 270 }
 271
 272 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
 273                                 enum iwl_dbgfs_bf_mask param, int value)
 274 {
 275         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 276         struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
 277
 278         dbgfs_bf->mask |= param;
 279
 280         switch (param) {
 281         case MVM_DEBUGFS_BF_ENERGY_DELTA:
 282                 dbgfs_bf->bf_energy_delta = value;
 283                 break;
 284         case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
 285                 dbgfs_bf->bf_roaming_energy_delta = value;
 286                 break;
 287         case MVM_DEBUGFS_BF_ROAMING_STATE:
 288                 dbgfs_bf->bf_roaming_state = value;
 289                 break;
 290         case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
 291                 dbgfs_bf->bf_temp_threshold = value;
 292                 break;
 293         case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
 294                 dbgfs_bf->bf_temp_fast_filter = value;
 295                 break;
 296         case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
 297                 dbgfs_bf->bf_temp_slow_filter = value;
 298                 break;
 299         case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
 300                 dbgfs_bf->bf_enable_beacon_filter = value;
 301                 break;
 302         case MVM_DEBUGFS_BF_DEBUG_FLAG:
 303                 dbgfs_bf->bf_debug_flag = value;
 304                 break;
 305         case MVM_DEBUGFS_BF_ESCAPE_TIMER:
 306                 dbgfs_bf->bf_escape_timer = value;
 307                 break;
 308         case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
 309                 dbgfs_bf->ba_enable_beacon_abort = value;
 310                 break;
 311         case MVM_DEBUGFS_BA_ESCAPE_TIMER:
 312                 dbgfs_bf->ba_escape_timer = value;
 313                 break;
 314         }
 315 }
 316
 317 static ssize_t iwl_dbgfs_bf_params_write(struct ieee80211_vif *vif, char *buf,
 318                                          size_t count, loff_t *ppos)
 319 {
 320         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 321         struct iwl_mvm *mvm = mvmvif->mvm;
 322         enum iwl_dbgfs_bf_mask param;
 323         int value, ret = 0;
 324
 325         if (!strncmp("bf_energy_delta=", buf, 16)) {
 326                 if (sscanf(buf+16, "%d", &value) != 1)
 327                         return -EINVAL;
 328                 if (value < IWL_BF_ENERGY_DELTA_MIN ||
 329                     value > IWL_BF_ENERGY_DELTA_MAX)
 330                         return -EINVAL;
 331                 param = MVM_DEBUGFS_BF_ENERGY_DELTA;
 332         } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
 333                 if (sscanf(buf+24, "%d", &value) != 1)
 334                         return -EINVAL;
 335                 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
 336                     value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
 337                         return -EINVAL;
 338                 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
 339         } else if (!strncmp("bf_roaming_state=", buf, 17)) {
 340                 if (sscanf(buf+17, "%d", &value) != 1)
 341                         return -EINVAL;
 342                 if (value < IWL_BF_ROAMING_STATE_MIN ||
 343                     value > IWL_BF_ROAMING_STATE_MAX)
 344                         return -EINVAL;
 345                 param = MVM_DEBUGFS_BF_ROAMING_STATE;
 346         } else if (!strncmp("bf_temp_threshold=", buf, 18)) {
 347                 if (sscanf(buf+18, "%d", &value) != 1)
 348                         return -EINVAL;
 349                 if (value < IWL_BF_TEMP_THRESHOLD_MIN ||
 350                     value > IWL_BF_TEMP_THRESHOLD_MAX)
 351                         return -EINVAL;
 352                 param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
 353         } else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
 354                 if (sscanf(buf+20, "%d", &value) != 1)
 355                         return -EINVAL;
 356                 if (value < IWL_BF_TEMP_FAST_FILTER_MIN ||
 357                     value > IWL_BF_TEMP_FAST_FILTER_MAX)
 358                         return -EINVAL;
 359                 param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
 360         } else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
 361                 if (sscanf(buf+20, "%d", &value) != 1)
 362                         return -EINVAL;
 363                 if (value < IWL_BF_TEMP_SLOW_FILTER_MIN ||
 364                     value > IWL_BF_TEMP_SLOW_FILTER_MAX)
 365                         return -EINVAL;
 366                 param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
 367         } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
 368                 if (sscanf(buf+24, "%d", &value) != 1)
 369                         return -EINVAL;
 370                 if (value < 0 || value > 1)
 371                         return -EINVAL;
 372                 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
 373         } else if (!strncmp("bf_debug_flag=", buf, 14)) {
 374                 if (sscanf(buf+14, "%d", &value) != 1)
 375                         return -EINVAL;
 376                 if (value < 0 || value > 1)
 377                         return -EINVAL;
 378                 param = MVM_DEBUGFS_BF_DEBUG_FLAG;
 379         } else if (!strncmp("bf_escape_timer=", buf, 16)) {
 380                 if (sscanf(buf+16, "%d", &value) != 1)
 381                         return -EINVAL;
 382                 if (value < IWL_BF_ESCAPE_TIMER_MIN ||
 383                     value > IWL_BF_ESCAPE_TIMER_MAX)
 384                         return -EINVAL;
 385                 param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
 386         } else if (!strncmp("ba_escape_timer=", buf, 16)) {
 387                 if (sscanf(buf+16, "%d", &value) != 1)
 388                         return -EINVAL;
 389                 if (value < IWL_BA_ESCAPE_TIMER_MIN ||
 390                     value > IWL_BA_ESCAPE_TIMER_MAX)
 391                         return -EINVAL;
 392                 param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
 393         } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
 394                 if (sscanf(buf+23, "%d", &value) != 1)
 395                         return -EINVAL;
 396                 if (value < 0 || value > 1)
 397                         return -EINVAL;
 398                 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
 399         } else {
 400                 return -EINVAL;
 401         }
 402
 403         mutex_lock(&mvm->mutex);
 404         iwl_dbgfs_update_bf(vif, param, value);
 405         if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
 406                 ret = iwl_mvm_disable_beacon_filter(mvm, vif);
 407         else
 408                 ret = iwl_mvm_enable_beacon_filter(mvm, vif);
 409         mutex_unlock(&mvm->mutex);
 410
 411         return ret ?: count;
 412 }
 413
 414 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
 415                                         char __user *user_buf,
 416                                         size_t count, loff_t *ppos)
 417 {
 418         struct ieee80211_vif *vif = file->private_data;
 419         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 420         char buf[256];
 421         int pos = 0;
 422         const size_t bufsz = sizeof(buf);
 423         struct iwl_beacon_filter_cmd cmd = {
 424                 IWL_BF_CMD_CONFIG_DEFAULTS,
 425                 .bf_enable_beacon_filter =
 426                         cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
 427                 .ba_enable_beacon_abort =
 428                         cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
 429         };
 430
 431         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 432         if (mvmvif->bf_data.bf_enabled)
 433                 cmd.bf_enable_beacon_filter = cpu_to_le32(1);
 434         else
 435                 cmd.bf_enable_beacon_filter = 0;
 436
 437         pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
 438                          le32_to_cpu(cmd.bf_energy_delta));
 439         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
 440                          le32_to_cpu(cmd.bf_roaming_energy_delta));
 441         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
 442                          le32_to_cpu(cmd.bf_roaming_state));
 443         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
 444                          le32_to_cpu(cmd.bf_temp_threshold));
 445         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
 446                          le32_to_cpu(cmd.bf_temp_fast_filter));
 447         pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
 448                          le32_to_cpu(cmd.bf_temp_slow_filter));
 449         pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
 450                          le32_to_cpu(cmd.bf_enable_beacon_filter));
 451         pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
 452                          le32_to_cpu(cmd.bf_debug_flag));
 453         pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
 454                          le32_to_cpu(cmd.bf_escape_timer));
 455         pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
 456                          le32_to_cpu(cmd.ba_escape_timer));
 457         pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
 458                          le32_to_cpu(cmd.ba_enable_beacon_abort));
 459
 460         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 461 }
 462
 463 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
 464         _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 465 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
 466         _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 467 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {               \
 468                 if (!debugfs_create_file(#name, mode, parent, vif,      \
 469                                          &iwl_dbgfs_##name##_ops))      \
 470                         goto err;                                       \
 471         } while (0)
 472
 473 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 474 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
 475 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
 476
 477 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 478 {
 479         struct dentry *dbgfs_dir = vif->debugfs_dir;
 480         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 481         char buf[100];
 482
 483         /*
 484          * Check if debugfs directory already exist before creating it.
 485          * This may happen when, for example, resetting hw or suspend-resume
 486          */
 487         if (!dbgfs_dir || mvmvif->dbgfs_dir)
 488                 return;
 489
 490         mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 491         mvmvif->mvm = mvm;
 492
 493         if (!mvmvif->dbgfs_dir) {
 494                 IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
 495                         dbgfs_dir->d_name.name);
 496                 return;
 497         }
 498
 499         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
 500             ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
 501              (vif->type == NL80211_IFTYPE_STATION && vif->p2p &&
 502               mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_P2P_PS)))
 503                 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR |
 504                                          S_IRUSR);
 505
 506         MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir,
 507                                  S_IRUSR);
 508
 509         if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 510             mvmvif == mvm->bf_allowed_vif)
 511                 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir,
 512                                          S_IRUSR | S_IWUSR);
 513
 514         /*
 515          * Create symlink for convenience pointing to interface specific
 516          * debugfs entries for the driver. For example, under
 517          * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
 518          * find
 519          * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
 520          */
 521         snprintf(buf, 100, "../../../%s/%s/%s/%s",
 522                  dbgfs_dir->d_parent->d_parent->d_name.name,
 523                  dbgfs_dir->d_parent->d_name.name,
 524                  dbgfs_dir->d_name.name,
 525                  mvmvif->dbgfs_dir->d_name.name);
 526
 527         mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
 528                                                      mvm->debugfs_dir, buf);
 529         if (!mvmvif->dbgfs_slink)
 530                 IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
 531                         dbgfs_dir->d_name.name);
 532         return;
 533 err:
 534         IWL_ERR(mvm, "Can't create debugfs entity\n");
 535 }
 536
 537 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 538 {
 539         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 540
 541         debugfs_remove(mvmvif->dbgfs_slink);
 542         mvmvif->dbgfs_slink = NULL;
 543
 544         debugfs_remove_recursive(mvmvif->dbgfs_dir);
 545         mvmvif->dbgfs_dir = NULL;
 546 }