drivers/net/wireless/iwlwifi/mvm/debugfs.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 - 2013 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
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  20  * along with this program; if not, write to the Free Software
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
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  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  37  * modification, are permitted provided that the following conditions
  38  * are met:
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  41  *    notice, this list of conditions and the following disclaimer.
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  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  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 "sta.h"
  65 #include "iwl-io.h"
  66
  67 struct iwl_dbgfs_mvm_ctx {
  68         struct iwl_mvm *mvm;
  69         struct ieee80211_vif *vif;
  70 };
  71
  72 static ssize_t iwl_dbgfs_tx_flush_write(struct file *file,
  73                                         const char __user *user_buf,
  74                                         size_t count, loff_t *ppos)
  75 {
  76         struct iwl_mvm *mvm = file->private_data;
  77
  78         char buf[16];
  79         int buf_size, ret;
  80         u32 scd_q_msk;
  81
  82         if (!mvm->ucode_loaded || mvm->cur_ucode != IWL_UCODE_REGULAR)
  83                 return -EIO;
  84
  85         memset(buf, 0, sizeof(buf));
  86         buf_size = min(count, sizeof(buf) - 1);
  87         if (copy_from_user(buf, user_buf, buf_size))
  88                 return -EFAULT;
  89
  90         if (sscanf(buf, "%x", &scd_q_msk) != 1)
  91                 return -EINVAL;
  92
  93         IWL_ERR(mvm, "FLUSHING queues: scd_q_msk = 0x%x\n", scd_q_msk);
  94
  95         mutex_lock(&mvm->mutex);
  96         ret =  iwl_mvm_flush_tx_path(mvm, scd_q_msk, true) ? : count;
  97         mutex_unlock(&mvm->mutex);
  98
  99         return ret;
 100 }
 101
 102 static ssize_t iwl_dbgfs_sta_drain_write(struct file *file,
 103                                          const char __user *user_buf,
 104                                          size_t count, loff_t *ppos)
 105 {
 106         struct iwl_mvm *mvm = file->private_data;
 107         struct ieee80211_sta *sta;
 108
 109         char buf[8];
 110         int buf_size, sta_id, drain, ret;
 111
 112         if (!mvm->ucode_loaded || mvm->cur_ucode != IWL_UCODE_REGULAR)
 113                 return -EIO;
 114
 115         memset(buf, 0, sizeof(buf));
 116         buf_size = min(count, sizeof(buf) - 1);
 117         if (copy_from_user(buf, user_buf, buf_size))
 118                 return -EFAULT;
 119
 120         if (sscanf(buf, "%d %d", &sta_id, &drain) != 2)
 121                 return -EINVAL;
 122
 123         mutex_lock(&mvm->mutex);
 124
 125         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 126                                         lockdep_is_held(&mvm->mutex));
 127         if (IS_ERR_OR_NULL(sta))
 128                 ret = -ENOENT;
 129         else
 130                 ret = iwl_mvm_drain_sta(mvm, (void *)sta->drv_priv, drain) ? :
 131                         count;
 132
 133         mutex_unlock(&mvm->mutex);
 134
 135         return ret;
 136 }
 137
 138 static ssize_t iwl_dbgfs_sram_read(struct file *file, char __user *user_buf,
 139                                    size_t count, loff_t *ppos)
 140 {
 141         struct iwl_mvm *mvm = file->private_data;
 142         const struct fw_img *img;
 143         int ofs, len, pos = 0;
 144         size_t bufsz, ret;
 145         char *buf;
 146         u8 *ptr;
 147
 148         if (!mvm->ucode_loaded)
 149                 return -EINVAL;
 150
 151         /* default is to dump the entire data segment */
 152         if (!mvm->dbgfs_sram_offset && !mvm->dbgfs_sram_len) {
 153                 img = &mvm->fw->img[mvm->cur_ucode];
 154                 ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 155                 len = img->sec[IWL_UCODE_SECTION_DATA].len;
 156         } else {
 157                 ofs = mvm->dbgfs_sram_offset;
 158                 len = mvm->dbgfs_sram_len;
 159         }
 160
 161         bufsz = len * 4 + 256;
 162         buf = kzalloc(bufsz, GFP_KERNEL);
 163         if (!buf)
 164                 return -ENOMEM;
 165
 166         ptr = kzalloc(len, GFP_KERNEL);
 167         if (!ptr) {
 168                 kfree(buf);
 169                 return -ENOMEM;
 170         }
 171
 172         pos += scnprintf(buf + pos, bufsz - pos, "sram_len: 0x%x\n", len);
 173         pos += scnprintf(buf + pos, bufsz - pos, "sram_offset: 0x%x\n", ofs);
 174
 175         iwl_trans_read_mem_bytes(mvm->trans, ofs, ptr, len);
 176         for (ofs = 0; ofs < len; ofs += 16) {
 177                 pos += scnprintf(buf + pos, bufsz - pos, "0x%.4x ", ofs);
 178                 hex_dump_to_buffer(ptr + ofs, 16, 16, 1, buf + pos,
 179                                    bufsz - pos, false);
 180                 pos += strlen(buf + pos);
 181                 if (bufsz - pos > 0)
 182                         buf[pos++] = '\n';
 183         }
 184
 185         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 186
 187         kfree(buf);
 188         kfree(ptr);
 189
 190         return ret;
 191 }
 192
 193 static ssize_t iwl_dbgfs_sram_write(struct file *file,
 194                                     const char __user *user_buf, size_t count,
 195                                     loff_t *ppos)
 196 {
 197         struct iwl_mvm *mvm = file->private_data;
 198         char buf[64];
 199         int buf_size;
 200         u32 offset, len;
 201
 202         memset(buf, 0, sizeof(buf));
 203         buf_size = min(count, sizeof(buf) -  1);
 204         if (copy_from_user(buf, user_buf, buf_size))
 205                 return -EFAULT;
 206
 207         if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
 208                 if ((offset & 0x3) || (len & 0x3))
 209                         return -EINVAL;
 210                 mvm->dbgfs_sram_offset = offset;
 211                 mvm->dbgfs_sram_len = len;
 212         } else {
 213                 mvm->dbgfs_sram_offset = 0;
 214                 mvm->dbgfs_sram_len = 0;
 215         }
 216
 217         return count;
 218 }
 219
 220 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
 221                                        size_t count, loff_t *ppos)
 222 {
 223         struct iwl_mvm *mvm = file->private_data;
 224         struct ieee80211_sta *sta;
 225         char buf[400];
 226         int i, pos = 0, bufsz = sizeof(buf);
 227
 228         mutex_lock(&mvm->mutex);
 229
 230         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
 231                 pos += scnprintf(buf + pos, bufsz - pos, "%.2d: ", i);
 232                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
 233                                                 lockdep_is_held(&mvm->mutex));
 234                 if (!sta)
 235                         pos += scnprintf(buf + pos, bufsz - pos, "N/A\n");
 236                 else if (IS_ERR(sta))
 237                         pos += scnprintf(buf + pos, bufsz - pos, "%ld\n",
 238                                          PTR_ERR(sta));
 239                 else
 240                         pos += scnprintf(buf + pos, bufsz - pos, "%pM\n",
 241                                          sta->addr);
 242         }
 243
 244         mutex_unlock(&mvm->mutex);
 245
 246         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 247 }
 248
 249 static ssize_t iwl_dbgfs_power_down_allow_write(struct file *file,
 250                                                 const char __user *user_buf,
 251                                                 size_t count, loff_t *ppos)
 252 {
 253         struct iwl_mvm *mvm = file->private_data;
 254         char buf[8] = {};
 255         int allow;
 256
 257         if (!mvm->ucode_loaded)
 258                 return -EIO;
 259
 260         if (copy_from_user(buf, user_buf, sizeof(buf)))
 261                 return -EFAULT;
 262
 263         if (sscanf(buf, "%d", &allow) != 1)
 264                 return -EINVAL;
 265
 266         IWL_DEBUG_POWER(mvm, "%s device power down\n",
 267                         allow ? "allow" : "prevent");
 268
 269         /*
 270          * TODO: Send REPLY_DEBUG_CMD (0xf0) when FW support it
 271          */
 272
 273         return count;
 274 }
 275
 276 static ssize_t iwl_dbgfs_power_down_d3_allow_write(struct file *file,
 277                                                    const char __user *user_buf,
 278                                                    size_t count, loff_t *ppos)
 279 {
 280         struct iwl_mvm *mvm = file->private_data;
 281         char buf[8] = {};
 282         int allow;
 283
 284         if (copy_from_user(buf, user_buf, sizeof(buf)))
 285                 return -EFAULT;
 286
 287         if (sscanf(buf, "%d", &allow) != 1)
 288                 return -EINVAL;
 289
 290         IWL_DEBUG_POWER(mvm, "%s device power down in d3\n",
 291                         allow ? "allow" : "prevent");
 292
 293         /*
 294          * TODO: When WoWLAN FW alive notification happens, driver will send
 295          * REPLY_DEBUG_CMD setting power_down_allow flag according to
 296          * mvm->prevent_power_down_d3
 297          */
 298         mvm->prevent_power_down_d3 = !allow;
 299
 300         return count;
 301 }
 302
 303 static void iwl_dbgfs_update_pm(struct iwl_mvm *mvm,
 304                                  struct ieee80211_vif *vif,
 305                                  enum iwl_dbgfs_pm_mask param, int val)
 306 {
 307         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 308         struct iwl_dbgfs_pm *dbgfs_pm = &mvmvif->dbgfs_pm;
 309
 310         dbgfs_pm->mask |= param;
 311
 312         switch (param) {
 313         case MVM_DEBUGFS_PM_KEEP_ALIVE: {
 314                 struct ieee80211_hw *hw = mvm->hw;
 315                 int dtimper = hw->conf.ps_dtim_period ?: 1;
 316                 int dtimper_msec = dtimper * vif->bss_conf.beacon_int;
 317
 318                 IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val);
 319                 if (val * MSEC_PER_SEC < 3 * dtimper_msec) {
 320                         IWL_WARN(mvm,
 321                                  "debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n",
 322                                  val * MSEC_PER_SEC, 3 * dtimper_msec);
 323                 }
 324                 dbgfs_pm->keep_alive_seconds = val;
 325                 break;
 326         }
 327         case MVM_DEBUGFS_PM_SKIP_OVER_DTIM:
 328                 IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n",
 329                                 val ? "enabled" : "disabled");
 330                 dbgfs_pm->skip_over_dtim = val;
 331                 break;
 332         case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS:
 333                 IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val);
 334                 dbgfs_pm->skip_dtim_periods = val;
 335                 break;
 336         case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT:
 337                 IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val);
 338                 dbgfs_pm->rx_data_timeout = val;
 339                 break;
 340         case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT:
 341                 IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val);
 342                 dbgfs_pm->tx_data_timeout = val;
 343                 break;
 344         case MVM_DEBUGFS_PM_DISABLE_POWER_OFF:
 345                 IWL_DEBUG_POWER(mvm, "disable_power_off=%d\n", val);
 346                 dbgfs_pm->disable_power_off = val;
 347         case MVM_DEBUGFS_PM_LPRX_ENA:
 348                 IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
 349                 dbgfs_pm->lprx_ena = val;
 350                 break;
 351         case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
 352                 IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
 353                 dbgfs_pm->lprx_rssi_threshold = val;
 354                 break;
 355         }
 356 }
 357
 358 static ssize_t iwl_dbgfs_pm_params_write(struct file *file,
 359                                          const char __user *user_buf,
 360                                          size_t count, loff_t *ppos)
 361 {
 362         struct ieee80211_vif *vif = file->private_data;
 363         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 364         struct iwl_mvm *mvm = mvmvif->dbgfs_data;
 365         enum iwl_dbgfs_pm_mask param;
 366         char buf[32] = {};
 367         int val;
 368         int ret;
 369
 370         if (copy_from_user(buf, user_buf, sizeof(buf)))
 371                 return -EFAULT;
 372
 373         if (!strncmp("keep_alive=", buf, 11)) {
 374                 if (sscanf(buf + 11, "%d", &val) != 1)
 375                         return -EINVAL;
 376                 param = MVM_DEBUGFS_PM_KEEP_ALIVE;
 377         } else if (!strncmp("skip_over_dtim=", buf, 15)) {
 378                 if (sscanf(buf + 15, "%d", &val) != 1)
 379                         return -EINVAL;
 380                 param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
 381         } else if (!strncmp("skip_dtim_periods=", buf, 18)) {
 382                 if (sscanf(buf + 18, "%d", &val) != 1)
 383                         return -EINVAL;
 384                 param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
 385         } else if (!strncmp("rx_data_timeout=", buf, 16)) {
 386                 if (sscanf(buf + 16, "%d", &val) != 1)
 387                         return -EINVAL;
 388                 param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
 389         } else if (!strncmp("tx_data_timeout=", buf, 16)) {
 390                 if (sscanf(buf + 16, "%d", &val) != 1)
 391                         return -EINVAL;
 392                 param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
 393         } else if (!strncmp("disable_power_off=", buf, 18)) {
 394                 if (sscanf(buf + 18, "%d", &val) != 1)
 395                         return -EINVAL;
 396                 param = MVM_DEBUGFS_PM_DISABLE_POWER_OFF;
 397         } else if (!strncmp("lprx=", buf, 5)) {
 398                 if (sscanf(buf + 5, "%d", &val) != 1)
 399                         return -EINVAL;
 400                 param = MVM_DEBUGFS_PM_LPRX_ENA;
 401         } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
 402                 if (sscanf(buf + 20, "%d", &val) != 1)
 403                         return -EINVAL;
 404                 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
 405                     POWER_LPRX_RSSI_THRESHOLD_MIN)
 406                         return -EINVAL;
 407                 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
 408         } else {
 409                 return -EINVAL;
 410         }
 411
 412         mutex_lock(&mvm->mutex);
 413         iwl_dbgfs_update_pm(mvm, vif, param, val);
 414         ret = iwl_mvm_power_update_mode(mvm, vif);
 415         mutex_unlock(&mvm->mutex);
 416
 417         return ret ?: count;
 418 }
 419
 420 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
 421                                         char __user *user_buf,
 422                                         size_t count, loff_t *ppos)
 423 {
 424         struct ieee80211_vif *vif = file->private_data;
 425         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 426         struct iwl_mvm *mvm = mvmvif->dbgfs_data;
 427         struct iwl_powertable_cmd cmd = {};
 428         char buf[256];
 429         int bufsz = sizeof(buf);
 430         int pos = 0;
 431
 432         iwl_mvm_power_build_cmd(mvm, vif, &cmd);
 433
 434         pos += scnprintf(buf+pos, bufsz-pos, "disable_power_off = %d\n",
 435                          (cmd.flags &
 436                          cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK)) ?
 437                          0 : 1);
 438         pos += scnprintf(buf+pos, bufsz-pos, "skip_dtim_periods = %d\n",
 439                          le32_to_cpu(cmd.skip_dtim_periods));
 440         pos += scnprintf(buf+pos, bufsz-pos, "power_scheme = %d\n",
 441                          iwlmvm_mod_params.power_scheme);
 442         pos += scnprintf(buf+pos, bufsz-pos, "flags = 0x%x\n",
 443                          le16_to_cpu(cmd.flags));
 444         pos += scnprintf(buf+pos, bufsz-pos, "keep_alive = %d\n",
 445                          cmd.keep_alive_seconds);
 446
 447         if (cmd.flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
 448                 pos += scnprintf(buf+pos, bufsz-pos, "skip_over_dtim = %d\n",
 449                                  (cmd.flags &
 450                                  cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK)) ?
 451                                  1 : 0);
 452                 pos += scnprintf(buf+pos, bufsz-pos, "rx_data_timeout = %d\n",
 453                                  le32_to_cpu(cmd.rx_data_timeout));
 454                 pos += scnprintf(buf+pos, bufsz-pos, "tx_data_timeout = %d\n",
 455                                  le32_to_cpu(cmd.tx_data_timeout));
 456                 if (cmd.flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
 457                         pos += scnprintf(buf+pos, bufsz-pos,
 458                                          "lprx_rssi_threshold = %d\n",
 459                                          le32_to_cpu(cmd.lprx_rssi_threshold));
 460         }
 461
 462         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 463 }
 464
 465 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 466                                          char __user *user_buf,
 467                                          size_t count, loff_t *ppos)
 468 {
 469         struct ieee80211_vif *vif = file->private_data;
 470         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 471         struct iwl_mvm *mvm = mvmvif->dbgfs_data;
 472         u8 ap_sta_id;
 473         struct ieee80211_chanctx_conf *chanctx_conf;
 474         char buf[512];
 475         int bufsz = sizeof(buf);
 476         int pos = 0;
 477         int i;
 478
 479         mutex_lock(&mvm->mutex);
 480
 481         ap_sta_id = mvmvif->ap_sta_id;
 482
 483         pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 484                          mvmvif->id, mvmvif->color);
 485         pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 486                          vif->bss_conf.bssid);
 487         pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 488         for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++) {
 489                 pos += scnprintf(buf+pos, bufsz-pos,
 490                                  "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 491                                  i, mvmvif->queue_params[i].txop,
 492                                  mvmvif->queue_params[i].cw_min,
 493                                  mvmvif->queue_params[i].cw_max,
 494                                  mvmvif->queue_params[i].aifs,
 495                                  mvmvif->queue_params[i].uapsd);
 496         }
 497
 498         if (vif->type == NL80211_IFTYPE_STATION &&
 499             ap_sta_id != IWL_MVM_STATION_COUNT) {
 500                 struct ieee80211_sta *sta;
 501                 struct iwl_mvm_sta *mvm_sta;
 502
 503                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
 504                                                 lockdep_is_held(&mvm->mutex));
 505                 mvm_sta = (void *)sta->drv_priv;
 506                 pos += scnprintf(buf+pos, bufsz-pos,
 507                                  "ap_sta_id %d - reduced Tx power %d\n",
 508                                  ap_sta_id, mvm_sta->bt_reduced_txpower);
 509         }
 510
 511         rcu_read_lock();
 512         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 513         if (chanctx_conf) {
 514                 pos += scnprintf(buf+pos, bufsz-pos,
 515                                  "idle rx chains %d, active rx chains: %d\n",
 516                                  chanctx_conf->rx_chains_static,
 517                                  chanctx_conf->rx_chains_dynamic);
 518         }
 519         rcu_read_unlock();
 520
 521         mutex_unlock(&mvm->mutex);
 522
 523         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 524 }
 525
 526 #define BT_MBOX_MSG(_notif, _num, _field)                                    \
 527         ((le32_to_cpu((_notif)->mbox_msg[(_num)]) & BT_MBOX##_num##_##_field)\
 528         >> BT_MBOX##_num##_##_field##_POS)
 529
 530
 531 #define BT_MBOX_PRINT(_num, _field, _end)                                   \
 532                         pos += scnprintf(buf + pos, bufsz - pos,            \
 533                                          "\t%s: %d%s",                      \
 534                                          #_field,                           \
 535                                          BT_MBOX_MSG(notif, _num, _field),  \
 536                                          true ? "\n" : ", ");
 537
 538 static ssize_t iwl_dbgfs_bt_notif_read(struct file *file, char __user *user_buf,
 539                                        size_t count, loff_t *ppos)
 540 {
 541         struct iwl_mvm *mvm = file->private_data;
 542         struct iwl_bt_coex_profile_notif *notif = &mvm->last_bt_notif;
 543         char *buf;
 544         int ret, pos = 0, bufsz = sizeof(char) * 1024;
 545
 546         buf = kmalloc(bufsz, GFP_KERNEL);
 547         if (!buf)
 548                 return -ENOMEM;
 549
 550         mutex_lock(&mvm->mutex);
 551
 552         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw0:\n");
 553
 554         BT_MBOX_PRINT(0, LE_SLAVE_LAT, false);
 555         BT_MBOX_PRINT(0, LE_PROF1, false);
 556         BT_MBOX_PRINT(0, LE_PROF2, false);
 557         BT_MBOX_PRINT(0, LE_PROF_OTHER, false);
 558         BT_MBOX_PRINT(0, CHL_SEQ_N, false);
 559         BT_MBOX_PRINT(0, INBAND_S, false);
 560         BT_MBOX_PRINT(0, LE_MIN_RSSI, false);
 561         BT_MBOX_PRINT(0, LE_SCAN, false);
 562         BT_MBOX_PRINT(0, LE_ADV, false);
 563         BT_MBOX_PRINT(0, LE_MAX_TX_POWER, false);
 564         BT_MBOX_PRINT(0, OPEN_CON_1, true);
 565
 566         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw1:\n");
 567
 568         BT_MBOX_PRINT(1, BR_MAX_TX_POWER, false);
 569         BT_MBOX_PRINT(1, IP_SR, false);
 570         BT_MBOX_PRINT(1, LE_MSTR, false);
 571         BT_MBOX_PRINT(1, AGGR_TRFC_LD, false);
 572         BT_MBOX_PRINT(1, MSG_TYPE, false);
 573         BT_MBOX_PRINT(1, SSN, true);
 574
 575         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw2:\n");
 576
 577         BT_MBOX_PRINT(2, SNIFF_ACT, false);
 578         BT_MBOX_PRINT(2, PAG, false);
 579         BT_MBOX_PRINT(2, INQUIRY, false);
 580         BT_MBOX_PRINT(2, CONN, false);
 581         BT_MBOX_PRINT(2, SNIFF_INTERVAL, false);
 582         BT_MBOX_PRINT(2, DISC, false);
 583         BT_MBOX_PRINT(2, SCO_TX_ACT, false);
 584         BT_MBOX_PRINT(2, SCO_RX_ACT, false);
 585         BT_MBOX_PRINT(2, ESCO_RE_TX, false);
 586         BT_MBOX_PRINT(2, SCO_DURATION, true);
 587
 588         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw3:\n");
 589
 590         BT_MBOX_PRINT(3, SCO_STATE, false);
 591         BT_MBOX_PRINT(3, SNIFF_STATE, false);
 592         BT_MBOX_PRINT(3, A2DP_STATE, false);
 593         BT_MBOX_PRINT(3, ACL_STATE, false);
 594         BT_MBOX_PRINT(3, MSTR_STATE, false);
 595         BT_MBOX_PRINT(3, OBX_STATE, false);
 596         BT_MBOX_PRINT(3, OPEN_CON_2, false);
 597         BT_MBOX_PRINT(3, TRAFFIC_LOAD, false);
 598         BT_MBOX_PRINT(3, CHL_SEQN_LSB, false);
 599         BT_MBOX_PRINT(3, INBAND_P, false);
 600         BT_MBOX_PRINT(3, MSG_TYPE_2, false);
 601         BT_MBOX_PRINT(3, SSN_2, false);
 602         BT_MBOX_PRINT(3, UPDATE_REQUEST, true);
 603
 604         pos += scnprintf(buf+pos, bufsz-pos, "bt_status = %d\n",
 605                                          notif->bt_status);
 606         pos += scnprintf(buf+pos, bufsz-pos, "bt_open_conn = %d\n",
 607                                          notif->bt_open_conn);
 608         pos += scnprintf(buf+pos, bufsz-pos, "bt_traffic_load = %d\n",
 609                                          notif->bt_traffic_load);
 610         pos += scnprintf(buf+pos, bufsz-pos, "bt_agg_traffic_load = %d\n",
 611                                          notif->bt_agg_traffic_load);
 612         pos += scnprintf(buf+pos, bufsz-pos, "bt_ci_compliance = %d\n",
 613                                          notif->bt_ci_compliance);
 614
 615         mutex_unlock(&mvm->mutex);
 616
 617         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 618         kfree(buf);
 619
 620         return ret;
 621 }
 622 #undef BT_MBOX_PRINT
 623
 624 static ssize_t iwl_dbgfs_fw_restart_write(struct file *file,
 625                                           const char __user *user_buf,
 626                                           size_t count, loff_t *ppos)
 627 {
 628         struct iwl_mvm *mvm = file->private_data;
 629         bool restart_fw = iwlwifi_mod_params.restart_fw;
 630         int ret;
 631
 632         iwlwifi_mod_params.restart_fw = true;
 633
 634         mutex_lock(&mvm->mutex);
 635
 636         /* take the return value to make compiler happy - it will fail anyway */
 637         ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_ERROR, CMD_SYNC, 0, NULL);
 638
 639         mutex_unlock(&mvm->mutex);
 640
 641         iwlwifi_mod_params.restart_fw = restart_fw;
 642
 643         return count;
 644 }
 645
 646 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
 647                                 enum iwl_dbgfs_bf_mask param, int value)
 648 {
 649         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 650         struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
 651
 652         dbgfs_bf->mask |= param;
 653
 654         switch (param) {
 655         case MVM_DEBUGFS_BF_ENERGY_DELTA:
 656                 dbgfs_bf->bf_energy_delta = value;
 657                 break;
 658         case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
 659                 dbgfs_bf->bf_roaming_energy_delta = value;
 660                 break;
 661         case MVM_DEBUGFS_BF_ROAMING_STATE:
 662                 dbgfs_bf->bf_roaming_state = value;
 663                 break;
 664         case MVM_DEBUGFS_BF_TEMPERATURE_DELTA:
 665                 dbgfs_bf->bf_temperature_delta = value;
 666                 break;
 667         case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
 668                 dbgfs_bf->bf_enable_beacon_filter = value;
 669                 break;
 670         case MVM_DEBUGFS_BF_DEBUG_FLAG:
 671                 dbgfs_bf->bf_debug_flag = value;
 672                 break;
 673         case MVM_DEBUGFS_BF_ESCAPE_TIMER:
 674                 dbgfs_bf->bf_escape_timer = value;
 675                 break;
 676         case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
 677                 dbgfs_bf->ba_enable_beacon_abort = value;
 678                 break;
 679         case MVM_DEBUGFS_BA_ESCAPE_TIMER:
 680                 dbgfs_bf->ba_escape_timer = value;
 681                 break;
 682         }
 683 }
 684
 685 static ssize_t iwl_dbgfs_bf_params_write(struct file *file,
 686                                          const char __user *user_buf,
 687                                          size_t count, loff_t *ppos)
 688 {
 689         struct ieee80211_vif *vif = file->private_data;
 690         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 691         struct iwl_mvm *mvm = mvmvif->dbgfs_data;
 692         enum iwl_dbgfs_bf_mask param;
 693         char buf[256];
 694         int buf_size;
 695         int value;
 696         int ret = 0;
 697
 698         memset(buf, 0, sizeof(buf));
 699         buf_size = min(count, sizeof(buf) - 1);
 700         if (copy_from_user(buf, user_buf, buf_size))
 701                 return -EFAULT;
 702
 703         if (!strncmp("bf_energy_delta=", buf, 16)) {
 704                 if (sscanf(buf+16, "%d", &value) != 1)
 705                         return -EINVAL;
 706                 if (value < IWL_BF_ENERGY_DELTA_MIN ||
 707                     value > IWL_BF_ENERGY_DELTA_MAX)
 708                         return -EINVAL;
 709                 param = MVM_DEBUGFS_BF_ENERGY_DELTA;
 710         } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
 711                 if (sscanf(buf+24, "%d", &value) != 1)
 712                         return -EINVAL;
 713                 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
 714                     value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
 715                         return -EINVAL;
 716                 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
 717         } else if (!strncmp("bf_roaming_state=", buf, 17)) {
 718                 if (sscanf(buf+17, "%d", &value) != 1)
 719                         return -EINVAL;
 720                 if (value < IWL_BF_ROAMING_STATE_MIN ||
 721                     value > IWL_BF_ROAMING_STATE_MAX)
 722                         return -EINVAL;
 723                 param = MVM_DEBUGFS_BF_ROAMING_STATE;
 724         } else if (!strncmp("bf_temperature_delta=", buf, 21)) {
 725                 if (sscanf(buf+21, "%d", &value) != 1)
 726                         return -EINVAL;
 727                 if (value < IWL_BF_TEMPERATURE_DELTA_MIN ||
 728                     value > IWL_BF_TEMPERATURE_DELTA_MAX)
 729                         return -EINVAL;
 730                 param = MVM_DEBUGFS_BF_TEMPERATURE_DELTA;
 731         } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
 732                 if (sscanf(buf+24, "%d", &value) != 1)
 733                         return -EINVAL;
 734                 if (value < 0 || value > 1)
 735                         return -EINVAL;
 736                 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
 737         } else if (!strncmp("bf_debug_flag=", buf, 14)) {
 738                 if (sscanf(buf+14, "%d", &value) != 1)
 739                         return -EINVAL;
 740                 if (value < 0 || value > 1)
 741                         return -EINVAL;
 742                 param = MVM_DEBUGFS_BF_DEBUG_FLAG;
 743         } else if (!strncmp("bf_escape_timer=", buf, 16)) {
 744                 if (sscanf(buf+16, "%d", &value) != 1)
 745                         return -EINVAL;
 746                 if (value < IWL_BF_ESCAPE_TIMER_MIN ||
 747                     value > IWL_BF_ESCAPE_TIMER_MAX)
 748                         return -EINVAL;
 749                 param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
 750         } else if (!strncmp("ba_escape_timer=", buf, 16)) {
 751                 if (sscanf(buf+16, "%d", &value) != 1)
 752                         return -EINVAL;
 753                 if (value < IWL_BA_ESCAPE_TIMER_MIN ||
 754                     value > IWL_BA_ESCAPE_TIMER_MAX)
 755                         return -EINVAL;
 756                 param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
 757         } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
 758                 if (sscanf(buf+23, "%d", &value) != 1)
 759                         return -EINVAL;
 760                 if (value < 0 || value > 1)
 761                         return -EINVAL;
 762                 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
 763         } else {
 764                 return -EINVAL;
 765         }
 766
 767         mutex_lock(&mvm->mutex);
 768         iwl_dbgfs_update_bf(vif, param, value);
 769         if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value) {
 770                 ret = iwl_mvm_disable_beacon_filter(mvm, vif);
 771         } else {
 772                 if (mvmvif->bf_enabled)
 773                         ret = iwl_mvm_enable_beacon_filter(mvm, vif);
 774                 else
 775                         ret = iwl_mvm_disable_beacon_filter(mvm, vif);
 776         }
 777         mutex_unlock(&mvm->mutex);
 778
 779         return ret ?: count;
 780 }
 781
 782 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
 783                                         char __user *user_buf,
 784                                         size_t count, loff_t *ppos)
 785 {
 786         struct ieee80211_vif *vif = file->private_data;
 787         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 788         char buf[256];
 789         int pos = 0;
 790         const size_t bufsz = sizeof(buf);
 791         struct iwl_beacon_filter_cmd cmd = {
 792                 .bf_energy_delta = IWL_BF_ENERGY_DELTA_DEFAULT,
 793                 .bf_roaming_energy_delta = IWL_BF_ROAMING_ENERGY_DELTA_DEFAULT,
 794                 .bf_roaming_state = IWL_BF_ROAMING_STATE_DEFAULT,
 795                 .bf_temperature_delta = IWL_BF_TEMPERATURE_DELTA_DEFAULT,
 796                 .bf_enable_beacon_filter = IWL_BF_ENABLE_BEACON_FILTER_DEFAULT,
 797                 .bf_debug_flag = IWL_BF_DEBUG_FLAG_DEFAULT,
 798                 .bf_escape_timer = cpu_to_le32(IWL_BF_ESCAPE_TIMER_DEFAULT),
 799                 .ba_escape_timer = cpu_to_le32(IWL_BA_ESCAPE_TIMER_DEFAULT),
 800                 .ba_enable_beacon_abort = IWL_BA_ENABLE_BEACON_ABORT_DEFAULT,
 801         };
 802
 803         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 804         if (mvmvif->bf_enabled)
 805                 cmd.bf_enable_beacon_filter = 1;
 806         else
 807                 cmd.bf_enable_beacon_filter = 0;
 808
 809         pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
 810                          cmd.bf_energy_delta);
 811         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
 812                          cmd.bf_roaming_energy_delta);
 813         pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
 814                          cmd.bf_roaming_state);
 815         pos += scnprintf(buf+pos, bufsz-pos, "bf_temperature_delta = %d\n",
 816                          cmd.bf_temperature_delta);
 817         pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
 818                          cmd.bf_enable_beacon_filter);
 819         pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
 820                          cmd.bf_debug_flag);
 821         pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
 822                          cmd.bf_escape_timer);
 823         pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
 824                          cmd.ba_escape_timer);
 825         pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
 826                          cmd.ba_enable_beacon_abort);
 827
 828         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 829 }
 830
 831 #ifdef CONFIG_PM_SLEEP
 832 static ssize_t iwl_dbgfs_d3_sram_write(struct file *file,
 833                                        const char __user *user_buf,
 834                                        size_t count, loff_t *ppos)
 835 {
 836         struct iwl_mvm *mvm = file->private_data;
 837         char buf[8] = {};
 838         int store;
 839
 840         if (copy_from_user(buf, user_buf, sizeof(buf)))
 841                 return -EFAULT;
 842
 843         if (sscanf(buf, "%d", &store) != 1)
 844                 return -EINVAL;
 845
 846         mvm->store_d3_resume_sram = store;
 847
 848         return count;
 849 }
 850
 851 static ssize_t iwl_dbgfs_d3_sram_read(struct file *file, char __user *user_buf,
 852                                       size_t count, loff_t *ppos)
 853 {
 854         struct iwl_mvm *mvm = file->private_data;
 855         const struct fw_img *img;
 856         int ofs, len, pos = 0;
 857         size_t bufsz, ret;
 858         char *buf;
 859         u8 *ptr = mvm->d3_resume_sram;
 860
 861         img = &mvm->fw->img[IWL_UCODE_WOWLAN];
 862         len = img->sec[IWL_UCODE_SECTION_DATA].len;
 863
 864         bufsz = len * 4 + 256;
 865         buf = kzalloc(bufsz, GFP_KERNEL);
 866         if (!buf)
 867                 return -ENOMEM;
 868
 869         pos += scnprintf(buf, bufsz, "D3 SRAM capture: %sabled\n",
 870                          mvm->store_d3_resume_sram ? "en" : "dis");
 871
 872         if (ptr) {
 873                 for (ofs = 0; ofs < len; ofs += 16) {
 874                         pos += scnprintf(buf + pos, bufsz - pos,
 875                                          "0x%.4x ", ofs);
 876                         hex_dump_to_buffer(ptr + ofs, 16, 16, 1, buf + pos,
 877                                            bufsz - pos, false);
 878                         pos += strlen(buf + pos);
 879                         if (bufsz - pos > 0)
 880                                 buf[pos++] = '\n';
 881                 }
 882         } else {
 883                 pos += scnprintf(buf + pos, bufsz - pos,
 884                                  "(no data captured)\n");
 885         }
 886
 887         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 888
 889         kfree(buf);
 890
 891         return ret;
 892 }
 893 #endif
 894
 895 #define MVM_DEBUGFS_READ_FILE_OPS(name)                                 \
 896 static const struct file_operations iwl_dbgfs_##name##_ops = {  \
 897         .read = iwl_dbgfs_##name##_read,                                \
 898         .open = simple_open,                                            \
 899         .llseek = generic_file_llseek,                                  \
 900 }
 901
 902 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name)                           \
 903 static const struct file_operations iwl_dbgfs_##name##_ops = {  \
 904         .write = iwl_dbgfs_##name##_write,                              \
 905         .read = iwl_dbgfs_##name##_read,                                \
 906         .open = simple_open,                                            \
 907         .llseek = generic_file_llseek,                                  \
 908 };
 909
 910 #define MVM_DEBUGFS_WRITE_FILE_OPS(name)                                \
 911 static const struct file_operations iwl_dbgfs_##name##_ops = {  \
 912         .write = iwl_dbgfs_##name##_write,                              \
 913         .open = simple_open,                                            \
 914         .llseek = generic_file_llseek,                                  \
 915 };
 916
 917 #define MVM_DEBUGFS_ADD_FILE(name, parent, mode) do {                   \
 918                 if (!debugfs_create_file(#name, mode, parent, mvm,      \
 919                                          &iwl_dbgfs_##name##_ops))      \
 920                         goto err;                                       \
 921         } while (0)
 922
 923 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {               \
 924                 if (!debugfs_create_file(#name, mode, parent, vif,      \
 925                                          &iwl_dbgfs_##name##_ops))      \
 926                         goto err;                                       \
 927         } while (0)
 928
 929 /* Device wide debugfs entries */
 930 MVM_DEBUGFS_WRITE_FILE_OPS(tx_flush);
 931 MVM_DEBUGFS_WRITE_FILE_OPS(sta_drain);
 932 MVM_DEBUGFS_READ_WRITE_FILE_OPS(sram);
 933 MVM_DEBUGFS_READ_FILE_OPS(stations);
 934 MVM_DEBUGFS_READ_FILE_OPS(bt_notif);
 935 MVM_DEBUGFS_WRITE_FILE_OPS(power_down_allow);
 936 MVM_DEBUGFS_WRITE_FILE_OPS(power_down_d3_allow);
 937 MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart);
 938 #ifdef CONFIG_PM_SLEEP
 939 MVM_DEBUGFS_READ_WRITE_FILE_OPS(d3_sram);
 940 #endif
 941
 942 /* Interface specific debugfs entries */
 943 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 944 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params);
 945 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params);
 946
 947 int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
 948 {
 949         char buf[100];
 950
 951         mvm->debugfs_dir = dbgfs_dir;
 952
 953         MVM_DEBUGFS_ADD_FILE(tx_flush, mvm->debugfs_dir, S_IWUSR);
 954         MVM_DEBUGFS_ADD_FILE(sta_drain, mvm->debugfs_dir, S_IWUSR);
 955         MVM_DEBUGFS_ADD_FILE(sram, mvm->debugfs_dir, S_IWUSR | S_IRUSR);
 956         MVM_DEBUGFS_ADD_FILE(stations, dbgfs_dir, S_IRUSR);
 957         MVM_DEBUGFS_ADD_FILE(bt_notif, dbgfs_dir, S_IRUSR);
 958         MVM_DEBUGFS_ADD_FILE(power_down_allow, mvm->debugfs_dir, S_IWUSR);
 959         MVM_DEBUGFS_ADD_FILE(power_down_d3_allow, mvm->debugfs_dir, S_IWUSR);
 960         MVM_DEBUGFS_ADD_FILE(fw_restart, mvm->debugfs_dir, S_IWUSR);
 961 #ifdef CONFIG_PM_SLEEP
 962         MVM_DEBUGFS_ADD_FILE(d3_sram, mvm->debugfs_dir, S_IRUSR | S_IWUSR);
 963         MVM_DEBUGFS_ADD_FILE(d3_test, mvm->debugfs_dir, S_IRUSR);
 964         if (!debugfs_create_bool("d3_wake_sysassert", S_IRUSR | S_IWUSR,
 965                                  mvm->debugfs_dir, &mvm->d3_wake_sysassert))
 966                 goto err;
 967 #endif
 968
 969         /*
 970          * Create a symlink with mac80211. It will be removed when mac80211
 971          * exists (before the opmode exists which removes the target.)
 972          */
 973         snprintf(buf, 100, "../../%s/%s",
 974                  dbgfs_dir->d_parent->d_parent->d_name.name,
 975                  dbgfs_dir->d_parent->d_name.name);
 976         if (!debugfs_create_symlink("iwlwifi", mvm->hw->wiphy->debugfsdir, buf))
 977                 goto err;
 978
 979         return 0;
 980 err:
 981         IWL_ERR(mvm, "Can't create the mvm debugfs directory\n");
 982         return -ENOMEM;
 983 }
 984
 985 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 986 {
 987         struct dentry *dbgfs_dir = vif->debugfs_dir;
 988         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 989         char buf[100];
 990
 991         /*
 992          * Check if debugfs directory already exist before creating it.
 993          * This may happen when, for example, resetting hw or suspend-resume
 994          */
 995         if (!dbgfs_dir || mvmvif->dbgfs_dir)
 996                 return;
 997
 998         mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 999         mvmvif->dbgfs_data = mvm;
1000
1001         if (!mvmvif->dbgfs_dir) {
1002                 IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
1003                         dbgfs_dir->d_name.name);
1004                 return;
1005         }
1006
1007         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
1008             vif->type == NL80211_IFTYPE_STATION && !vif->p2p)
1009                 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR |
1010                                          S_IRUSR);
1011
1012         MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir,
1013                                  S_IRUSR);
1014
1015         if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
1016             mvmvif == mvm->bf_allowed_vif)
1017                 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir,
1018                                          S_IRUSR | S_IWUSR);
1019
1020         /*
1021          * Create symlink for convenience pointing to interface specific
1022          * debugfs entries for the driver. For example, under
1023          * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
1024          * find
1025          * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
1026          */
1027         snprintf(buf, 100, "../../../%s/%s/%s/%s",
1028                  dbgfs_dir->d_parent->d_parent->d_name.name,
1029                  dbgfs_dir->d_parent->d_name.name,
1030                  dbgfs_dir->d_name.name,
1031                  mvmvif->dbgfs_dir->d_name.name);
1032
1033         mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
1034                                                      mvm->debugfs_dir, buf);
1035         if (!mvmvif->dbgfs_slink)
1036                 IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
1037                         dbgfs_dir->d_name.name);
1038         return;
1039 err:
1040         IWL_ERR(mvm, "Can't create debugfs entity\n");
1041 }
1042
1043 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1044 {
1045         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1046
1047         debugfs_remove(mvmvif->dbgfs_slink);
1048         mvmvif->dbgfs_slink = NULL;
1049
1050         debugfs_remove_recursive(mvmvif->dbgfs_dir);
1051         mvmvif->dbgfs_dir = NULL;
1052 }