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.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
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  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  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:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  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         /* default is to dump the entire data segment */
 149         if (!mvm->dbgfs_sram_offset && !mvm->dbgfs_sram_len) {
 150                 mvm->dbgfs_sram_offset = 0x800000;
 151                 if (!mvm->ucode_loaded)
 152                         return -EINVAL;
 153                 img = &mvm->fw->img[mvm->cur_ucode];
 154                 mvm->dbgfs_sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 155         }
 156         len = mvm->dbgfs_sram_len;
 157
 158         bufsz = len * 4 + 256;
 159         buf = kzalloc(bufsz, GFP_KERNEL);
 160         if (!buf)
 161                 return -ENOMEM;
 162
 163         ptr = kzalloc(len, GFP_KERNEL);
 164         if (!ptr) {
 165                 kfree(buf);
 166                 return -ENOMEM;
 167         }
 168
 169         pos += scnprintf(buf + pos, bufsz - pos, "sram_len: 0x%x\n", len);
 170         pos += scnprintf(buf + pos, bufsz - pos, "sram_offset: 0x%x\n",
 171                          mvm->dbgfs_sram_offset);
 172
 173         iwl_trans_read_mem_bytes(mvm->trans,
 174                                  mvm->dbgfs_sram_offset,
 175                                  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 ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 304                                          char __user *user_buf,
 305                                          size_t count, loff_t *ppos)
 306 {
 307         struct ieee80211_vif *vif = file->private_data;
 308         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 309         struct iwl_mvm *mvm = mvmvif->dbgfs_data;
 310         u8 ap_sta_id;
 311         struct ieee80211_chanctx_conf *chanctx_conf;
 312         char buf[512];
 313         int bufsz = sizeof(buf);
 314         int pos = 0;
 315         int i;
 316
 317         mutex_lock(&mvm->mutex);
 318
 319         ap_sta_id = mvmvif->ap_sta_id;
 320
 321         pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 322                          mvmvif->id, mvmvif->color);
 323         pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 324                          vif->bss_conf.bssid);
 325         pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 326         for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++) {
 327                 pos += scnprintf(buf+pos, bufsz-pos,
 328                                  "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 329                                  i, mvmvif->queue_params[i].txop,
 330                                  mvmvif->queue_params[i].cw_min,
 331                                  mvmvif->queue_params[i].cw_max,
 332                                  mvmvif->queue_params[i].aifs,
 333                                  mvmvif->queue_params[i].uapsd);
 334         }
 335
 336         if (vif->type == NL80211_IFTYPE_STATION &&
 337             ap_sta_id != IWL_MVM_STATION_COUNT) {
 338                 struct ieee80211_sta *sta;
 339                 struct iwl_mvm_sta *mvm_sta;
 340
 341                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
 342                                                 lockdep_is_held(&mvm->mutex));
 343                 mvm_sta = (void *)sta->drv_priv;
 344                 pos += scnprintf(buf+pos, bufsz-pos,
 345                                  "ap_sta_id %d - reduced Tx power %d\n",
 346                                  ap_sta_id, mvm_sta->bt_reduced_txpower);
 347         }
 348
 349         rcu_read_lock();
 350         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 351         if (chanctx_conf) {
 352                 pos += scnprintf(buf+pos, bufsz-pos,
 353                                  "idle rx chains %d, active rx chains: %d\n",
 354                                  chanctx_conf->rx_chains_static,
 355                                  chanctx_conf->rx_chains_dynamic);
 356         }
 357         rcu_read_unlock();
 358
 359         mutex_unlock(&mvm->mutex);
 360
 361         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 362 }
 363
 364 #define BT_MBOX_MSG(_notif, _num, _field)                                    \
 365         ((le32_to_cpu((_notif)->mbox_msg[(_num)]) & BT_MBOX##_num##_##_field)\
 366         >> BT_MBOX##_num##_##_field##_POS)
 367
 368
 369 #define BT_MBOX_PRINT(_num, _field, _end)                                   \
 370                         pos += scnprintf(buf + pos, bufsz - pos,            \
 371                                          "\t%s: %d%s",                      \
 372                                          #_field,                           \
 373                                          BT_MBOX_MSG(notif, _num, _field),  \
 374                                          true ? "\n" : ", ");
 375
 376 static ssize_t iwl_dbgfs_bt_notif_read(struct file *file, char __user *user_buf,
 377                                        size_t count, loff_t *ppos)
 378 {
 379         struct iwl_mvm *mvm = file->private_data;
 380         struct iwl_bt_coex_profile_notif *notif = &mvm->last_bt_notif;
 381         char *buf;
 382         int ret, pos = 0, bufsz = sizeof(char) * 1024;
 383
 384         buf = kmalloc(bufsz, GFP_KERNEL);
 385         if (!buf)
 386                 return -ENOMEM;
 387
 388         mutex_lock(&mvm->mutex);
 389
 390         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw0:\n");
 391
 392         BT_MBOX_PRINT(0, LE_SLAVE_LAT, false);
 393         BT_MBOX_PRINT(0, LE_PROF1, false);
 394         BT_MBOX_PRINT(0, LE_PROF2, false);
 395         BT_MBOX_PRINT(0, LE_PROF_OTHER, false);
 396         BT_MBOX_PRINT(0, CHL_SEQ_N, false);
 397         BT_MBOX_PRINT(0, INBAND_S, false);
 398         BT_MBOX_PRINT(0, LE_MIN_RSSI, false);
 399         BT_MBOX_PRINT(0, LE_SCAN, false);
 400         BT_MBOX_PRINT(0, LE_ADV, false);
 401         BT_MBOX_PRINT(0, LE_MAX_TX_POWER, false);
 402         BT_MBOX_PRINT(0, OPEN_CON_1, true);
 403
 404         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw1:\n");
 405
 406         BT_MBOX_PRINT(1, BR_MAX_TX_POWER, false);
 407         BT_MBOX_PRINT(1, IP_SR, false);
 408         BT_MBOX_PRINT(1, LE_MSTR, false);
 409         BT_MBOX_PRINT(1, AGGR_TRFC_LD, false);
 410         BT_MBOX_PRINT(1, MSG_TYPE, false);
 411         BT_MBOX_PRINT(1, SSN, true);
 412
 413         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw2:\n");
 414
 415         BT_MBOX_PRINT(2, SNIFF_ACT, false);
 416         BT_MBOX_PRINT(2, PAG, false);
 417         BT_MBOX_PRINT(2, INQUIRY, false);
 418         BT_MBOX_PRINT(2, CONN, false);
 419         BT_MBOX_PRINT(2, SNIFF_INTERVAL, false);
 420         BT_MBOX_PRINT(2, DISC, false);
 421         BT_MBOX_PRINT(2, SCO_TX_ACT, false);
 422         BT_MBOX_PRINT(2, SCO_RX_ACT, false);
 423         BT_MBOX_PRINT(2, ESCO_RE_TX, false);
 424         BT_MBOX_PRINT(2, SCO_DURATION, true);
 425
 426         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw3:\n");
 427
 428         BT_MBOX_PRINT(3, SCO_STATE, false);
 429         BT_MBOX_PRINT(3, SNIFF_STATE, false);
 430         BT_MBOX_PRINT(3, A2DP_STATE, false);
 431         BT_MBOX_PRINT(3, ACL_STATE, false);
 432         BT_MBOX_PRINT(3, MSTR_STATE, false);
 433         BT_MBOX_PRINT(3, OBX_STATE, false);
 434         BT_MBOX_PRINT(3, OPEN_CON_2, false);
 435         BT_MBOX_PRINT(3, TRAFFIC_LOAD, false);
 436         BT_MBOX_PRINT(3, CHL_SEQN_LSB, false);
 437         BT_MBOX_PRINT(3, INBAND_P, false);
 438         BT_MBOX_PRINT(3, MSG_TYPE_2, false);
 439         BT_MBOX_PRINT(3, SSN_2, false);
 440         BT_MBOX_PRINT(3, UPDATE_REQUEST, true);
 441
 442         pos += scnprintf(buf+pos, bufsz-pos, "bt_status = %d\n",
 443                                          notif->bt_status);
 444         pos += scnprintf(buf+pos, bufsz-pos, "bt_open_conn = %d\n",
 445                                          notif->bt_open_conn);
 446         pos += scnprintf(buf+pos, bufsz-pos, "bt_traffic_load = %d\n",
 447                                          notif->bt_traffic_load);
 448         pos += scnprintf(buf+pos, bufsz-pos, "bt_agg_traffic_load = %d\n",
 449                                          notif->bt_agg_traffic_load);
 450         pos += scnprintf(buf+pos, bufsz-pos, "bt_ci_compliance = %d\n",
 451                                          notif->bt_ci_compliance);
 452
 453         mutex_unlock(&mvm->mutex);
 454
 455         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 456         kfree(buf);
 457
 458         return ret;
 459 }
 460 #undef BT_MBOX_PRINT
 461
 462 static ssize_t iwl_dbgfs_fw_restart_write(struct file *file,
 463                                           const char __user *user_buf,
 464                                           size_t count, loff_t *ppos)
 465 {
 466         struct iwl_mvm *mvm = file->private_data;
 467         bool restart_fw = iwlwifi_mod_params.restart_fw;
 468         int ret;
 469
 470         iwlwifi_mod_params.restart_fw = true;
 471
 472         mutex_lock(&mvm->mutex);
 473
 474         /* take the return value to make compiler happy - it will fail anyway */
 475         ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_ERROR, CMD_SYNC, 0, NULL);
 476
 477         mutex_unlock(&mvm->mutex);
 478
 479         iwlwifi_mod_params.restart_fw = restart_fw;
 480
 481         return count;
 482 }
 483
 484 #define MVM_DEBUGFS_READ_FILE_OPS(name)                                 \
 485 static const struct file_operations iwl_dbgfs_##name##_ops = {  \
 486         .read = iwl_dbgfs_##name##_read,                                \
 487         .open = simple_open,                                            \
 488         .llseek = generic_file_llseek,                                  \
 489 }
 490
 491 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name)                           \
 492 static const struct file_operations iwl_dbgfs_##name##_ops = {  \
 493         .write = iwl_dbgfs_##name##_write,                              \
 494         .read = iwl_dbgfs_##name##_read,                                \
 495         .open = simple_open,                                            \
 496         .llseek = generic_file_llseek,                                  \
 497 };
 498
 499 #define MVM_DEBUGFS_WRITE_FILE_OPS(name)                                \
 500 static const struct file_operations iwl_dbgfs_##name##_ops = {  \
 501         .write = iwl_dbgfs_##name##_write,                              \
 502         .open = simple_open,                                            \
 503         .llseek = generic_file_llseek,                                  \
 504 };
 505
 506 #define MVM_DEBUGFS_ADD_FILE(name, parent, mode) do {                   \
 507                 if (!debugfs_create_file(#name, mode, parent, mvm,      \
 508                                          &iwl_dbgfs_##name##_ops))      \
 509                         goto err;                                       \
 510         } while (0)
 511
 512 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {               \
 513                 if (!debugfs_create_file(#name, mode, parent, vif,      \
 514                                          &iwl_dbgfs_##name##_ops))      \
 515                         goto err;                                       \
 516         } while (0)
 517
 518 /* Device wide debugfs entries */
 519 MVM_DEBUGFS_WRITE_FILE_OPS(tx_flush);
 520 MVM_DEBUGFS_WRITE_FILE_OPS(sta_drain);
 521 MVM_DEBUGFS_READ_WRITE_FILE_OPS(sram);
 522 MVM_DEBUGFS_READ_FILE_OPS(stations);
 523 MVM_DEBUGFS_READ_FILE_OPS(bt_notif);
 524 MVM_DEBUGFS_WRITE_FILE_OPS(power_down_allow);
 525 MVM_DEBUGFS_WRITE_FILE_OPS(power_down_d3_allow);
 526 MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart);
 527
 528 /* Interface specific debugfs entries */
 529 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 530
 531 int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
 532 {
 533         char buf[100];
 534
 535         mvm->debugfs_dir = dbgfs_dir;
 536
 537         MVM_DEBUGFS_ADD_FILE(tx_flush, mvm->debugfs_dir, S_IWUSR);
 538         MVM_DEBUGFS_ADD_FILE(sta_drain, mvm->debugfs_dir, S_IWUSR);
 539         MVM_DEBUGFS_ADD_FILE(sram, mvm->debugfs_dir, S_IWUSR | S_IRUSR);
 540         MVM_DEBUGFS_ADD_FILE(stations, dbgfs_dir, S_IRUSR);
 541         MVM_DEBUGFS_ADD_FILE(bt_notif, dbgfs_dir, S_IRUSR);
 542         MVM_DEBUGFS_ADD_FILE(power_down_allow, mvm->debugfs_dir, S_IWUSR);
 543         MVM_DEBUGFS_ADD_FILE(power_down_d3_allow, mvm->debugfs_dir, S_IWUSR);
 544         MVM_DEBUGFS_ADD_FILE(fw_restart, mvm->debugfs_dir, S_IWUSR);
 545
 546         /*
 547          * Create a symlink with mac80211. It will be removed when mac80211
 548          * exists (before the opmode exists which removes the target.)
 549          */
 550         snprintf(buf, 100, "../../%s/%s",
 551                  dbgfs_dir->d_parent->d_parent->d_name.name,
 552                  dbgfs_dir->d_parent->d_name.name);
 553         if (!debugfs_create_symlink("iwlwifi", mvm->hw->wiphy->debugfsdir, buf))
 554                 goto err;
 555
 556         return 0;
 557 err:
 558         IWL_ERR(mvm, "Can't create the mvm debugfs directory\n");
 559         return -ENOMEM;
 560 }
 561
 562 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 563 {
 564         struct dentry *dbgfs_dir = vif->debugfs_dir;
 565         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 566         char buf[100];
 567
 568         if (!dbgfs_dir)
 569                 return;
 570
 571         mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 572         mvmvif->dbgfs_data = mvm;
 573
 574         if (!mvmvif->dbgfs_dir) {
 575                 IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
 576                         dbgfs_dir->d_name.name);
 577                 return;
 578         }
 579
 580         MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir,
 581                                  S_IRUSR);
 582
 583         /*
 584          * Create symlink for convenience pointing to interface specific
 585          * debugfs entries for the driver. For example, under
 586          * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
 587          * find
 588          * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
 589          */
 590         snprintf(buf, 100, "../../../%s/%s/%s/%s",
 591                  dbgfs_dir->d_parent->d_parent->d_name.name,
 592                  dbgfs_dir->d_parent->d_name.name,
 593                  dbgfs_dir->d_name.name,
 594                  mvmvif->dbgfs_dir->d_name.name);
 595
 596         mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
 597                                                      mvm->debugfs_dir, buf);
 598         if (!mvmvif->dbgfs_slink)
 599                 IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
 600                         dbgfs_dir->d_name.name);
 601         return;
 602 err:
 603         IWL_ERR(mvm, "Can't create debugfs entity\n");
 604 }
 605
 606 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 607 {
 608         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 609
 610         debugfs_remove(mvmvif->dbgfs_slink);
 611         mvmvif->dbgfs_slink = NULL;
 612
 613         debugfs_remove_recursive(mvmvif->dbgfs_dir);
 614         mvmvif->dbgfs_dir = NULL;
 615 }