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  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
  34  * All rights reserved.
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  36  * Redistribution and use in source and binary forms, with or without
  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.
  46  *  * Neither the name Intel Corporation nor the names of its
  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         if (sta_id < 0 || sta_id >= IWL_MVM_STATION_COUNT)
 123                 return -EINVAL;
 124         if (drain < 0 || drain > 1)
 125                 return -EINVAL;
 126
 127         mutex_lock(&mvm->mutex);
 128
 129         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 130                                         lockdep_is_held(&mvm->mutex));
 131         if (IS_ERR_OR_NULL(sta))
 132                 ret = -ENOENT;
 133         else
 134                 ret = iwl_mvm_drain_sta(mvm, (void *)sta->drv_priv, drain) ? :
 135                         count;
 136
 137         mutex_unlock(&mvm->mutex);
 138
 139         return ret;
 140 }
 141
 142 static ssize_t iwl_dbgfs_sram_read(struct file *file, char __user *user_buf,
 143                                    size_t count, loff_t *ppos)
 144 {
 145         struct iwl_mvm *mvm = file->private_data;
 146         const struct fw_img *img;
 147         int ofs, len, pos = 0;
 148         size_t bufsz, ret;
 149         char *buf;
 150         u8 *ptr;
 151
 152         /* default is to dump the entire data segment */
 153         if (!mvm->dbgfs_sram_offset && !mvm->dbgfs_sram_len) {
 154                 mvm->dbgfs_sram_offset = 0x800000;
 155                 if (!mvm->ucode_loaded)
 156                         return -EINVAL;
 157                 img = &mvm->fw->img[mvm->cur_ucode];
 158                 mvm->dbgfs_sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 159         }
 160         len = mvm->dbgfs_sram_len;
 161
 162         bufsz = len * 4 + 256;
 163         buf = kzalloc(bufsz, GFP_KERNEL);
 164         if (!buf)
 165                 return -ENOMEM;
 166
 167         ptr = kzalloc(len, GFP_KERNEL);
 168         if (!ptr) {
 169                 kfree(buf);
 170                 return -ENOMEM;
 171         }
 172
 173         pos += scnprintf(buf + pos, bufsz - pos, "sram_len: 0x%x\n", len);
 174         pos += scnprintf(buf + pos, bufsz - pos, "sram_offset: 0x%x\n",
 175                          mvm->dbgfs_sram_offset);
 176
 177         iwl_trans_read_mem_bytes(mvm->trans,
 178                                  mvm->dbgfs_sram_offset,
 179                                  ptr, len);
 180         for (ofs = 0; ofs < len; ofs += 16) {
 181                 pos += scnprintf(buf + pos, bufsz - pos, "0x%.4x ", ofs);
 182                 hex_dump_to_buffer(ptr + ofs, 16, 16, 1, buf + pos,
 183                                    bufsz - pos, false);
 184                 pos += strlen(buf + pos);
 185                 if (bufsz - pos > 0)
 186                         buf[pos++] = '\n';
 187         }
 188
 189         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 190
 191         kfree(buf);
 192         kfree(ptr);
 193
 194         return ret;
 195 }
 196
 197 static ssize_t iwl_dbgfs_sram_write(struct file *file,
 198                                     const char __user *user_buf, size_t count,
 199                                     loff_t *ppos)
 200 {
 201         struct iwl_mvm *mvm = file->private_data;
 202         char buf[64];
 203         int buf_size;
 204         u32 offset, len;
 205
 206         memset(buf, 0, sizeof(buf));
 207         buf_size = min(count, sizeof(buf) -  1);
 208         if (copy_from_user(buf, user_buf, buf_size))
 209                 return -EFAULT;
 210
 211         if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
 212                 if ((offset & 0x3) || (len & 0x3))
 213                         return -EINVAL;
 214                 mvm->dbgfs_sram_offset = offset;
 215                 mvm->dbgfs_sram_len = len;
 216         } else {
 217                 mvm->dbgfs_sram_offset = 0;
 218                 mvm->dbgfs_sram_len = 0;
 219         }
 220
 221         return count;
 222 }
 223
 224 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
 225                                        size_t count, loff_t *ppos)
 226 {
 227         struct iwl_mvm *mvm = file->private_data;
 228         struct ieee80211_sta *sta;
 229         char buf[400];
 230         int i, pos = 0, bufsz = sizeof(buf);
 231
 232         mutex_lock(&mvm->mutex);
 233
 234         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
 235                 pos += scnprintf(buf + pos, bufsz - pos, "%.2d: ", i);
 236                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
 237                                                 lockdep_is_held(&mvm->mutex));
 238                 if (!sta)
 239                         pos += scnprintf(buf + pos, bufsz - pos, "N/A\n");
 240                 else if (IS_ERR(sta))
 241                         pos += scnprintf(buf + pos, bufsz - pos, "%ld\n",
 242                                          PTR_ERR(sta));
 243                 else
 244                         pos += scnprintf(buf + pos, bufsz - pos, "%pM\n",
 245                                          sta->addr);
 246         }
 247
 248         mutex_unlock(&mvm->mutex);
 249
 250         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 251 }
 252
 253 static ssize_t iwl_dbgfs_power_down_allow_write(struct file *file,
 254                                                 const char __user *user_buf,
 255                                                 size_t count, loff_t *ppos)
 256 {
 257         struct iwl_mvm *mvm = file->private_data;
 258         char buf[8] = {};
 259         int allow;
 260
 261         if (!mvm->ucode_loaded)
 262                 return -EIO;
 263
 264         if (copy_from_user(buf, user_buf, sizeof(buf)))
 265                 return -EFAULT;
 266
 267         if (sscanf(buf, "%d", &allow) != 1)
 268                 return -EINVAL;
 269
 270         IWL_DEBUG_POWER(mvm, "%s device power down\n",
 271                         allow ? "allow" : "prevent");
 272
 273         /*
 274          * TODO: Send REPLY_DEBUG_CMD (0xf0) when FW support it
 275          */
 276
 277         return count;
 278 }
 279
 280 static ssize_t iwl_dbgfs_power_down_d3_allow_write(struct file *file,
 281                                                    const char __user *user_buf,
 282                                                    size_t count, loff_t *ppos)
 283 {
 284         struct iwl_mvm *mvm = file->private_data;
 285         char buf[8] = {};
 286         int allow;
 287
 288         if (copy_from_user(buf, user_buf, sizeof(buf)))
 289                 return -EFAULT;
 290
 291         if (sscanf(buf, "%d", &allow) != 1)
 292                 return -EINVAL;
 293
 294         IWL_DEBUG_POWER(mvm, "%s device power down in d3\n",
 295                         allow ? "allow" : "prevent");
 296
 297         /*
 298          * TODO: When WoWLAN FW alive notification happens, driver will send
 299          * REPLY_DEBUG_CMD setting power_down_allow flag according to
 300          * mvm->prevent_power_down_d3
 301          */
 302         mvm->prevent_power_down_d3 = !allow;
 303
 304         return count;
 305 }
 306
 307 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 308                                          char __user *user_buf,
 309                                          size_t count, loff_t *ppos)
 310 {
 311         struct ieee80211_vif *vif = file->private_data;
 312         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 313         struct iwl_mvm *mvm = mvmvif->dbgfs_data;
 314         u8 ap_sta_id;
 315         struct ieee80211_chanctx_conf *chanctx_conf;
 316         char buf[512];
 317         int bufsz = sizeof(buf);
 318         int pos = 0;
 319         int i;
 320
 321         mutex_lock(&mvm->mutex);
 322
 323         ap_sta_id = mvmvif->ap_sta_id;
 324
 325         pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 326                          mvmvif->id, mvmvif->color);
 327         pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 328                          vif->bss_conf.bssid);
 329         pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 330         for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++) {
 331                 pos += scnprintf(buf+pos, bufsz-pos,
 332                                  "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 333                                  i, mvmvif->queue_params[i].txop,
 334                                  mvmvif->queue_params[i].cw_min,
 335                                  mvmvif->queue_params[i].cw_max,
 336                                  mvmvif->queue_params[i].aifs,
 337                                  mvmvif->queue_params[i].uapsd);
 338         }
 339
 340         if (vif->type == NL80211_IFTYPE_STATION &&
 341             ap_sta_id != IWL_MVM_STATION_COUNT) {
 342                 struct ieee80211_sta *sta;
 343                 struct iwl_mvm_sta *mvm_sta;
 344
 345                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
 346                                                 lockdep_is_held(&mvm->mutex));
 347                 mvm_sta = (void *)sta->drv_priv;
 348                 pos += scnprintf(buf+pos, bufsz-pos,
 349                                  "ap_sta_id %d - reduced Tx power %d\n",
 350                                  ap_sta_id, mvm_sta->bt_reduced_txpower);
 351         }
 352
 353         rcu_read_lock();
 354         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 355         if (chanctx_conf) {
 356                 pos += scnprintf(buf+pos, bufsz-pos,
 357                                  "idle rx chains %d, active rx chains: %d\n",
 358                                  chanctx_conf->rx_chains_static,
 359                                  chanctx_conf->rx_chains_dynamic);
 360         }
 361         rcu_read_unlock();
 362
 363         mutex_unlock(&mvm->mutex);
 364
 365         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 366 }
 367
 368 #define BT_MBOX_MSG(_notif, _num, _field)                                    \
 369         ((le32_to_cpu((_notif)->mbox_msg[(_num)]) & BT_MBOX##_num##_##_field)\
 370         >> BT_MBOX##_num##_##_field##_POS)
 371
 372
 373 #define BT_MBOX_PRINT(_num, _field, _end)                                   \
 374                         pos += scnprintf(buf + pos, bufsz - pos,            \
 375                                          "\t%s: %d%s",                      \
 376                                          #_field,                           \
 377                                          BT_MBOX_MSG(notif, _num, _field),  \
 378                                          true ? "\n" : ", ");
 379
 380 static ssize_t iwl_dbgfs_bt_notif_read(struct file *file, char __user *user_buf,
 381                                        size_t count, loff_t *ppos)
 382 {
 383         struct iwl_mvm *mvm = file->private_data;
 384         struct iwl_bt_coex_profile_notif *notif = &mvm->last_bt_notif;
 385         char *buf;
 386         int ret, pos = 0, bufsz = sizeof(char) * 1024;
 387
 388         buf = kmalloc(bufsz, GFP_KERNEL);
 389         if (!buf)
 390                 return -ENOMEM;
 391
 392         mutex_lock(&mvm->mutex);
 393
 394         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw0:\n");
 395
 396         BT_MBOX_PRINT(0, LE_SLAVE_LAT, false);
 397         BT_MBOX_PRINT(0, LE_PROF1, false);
 398         BT_MBOX_PRINT(0, LE_PROF2, false);
 399         BT_MBOX_PRINT(0, LE_PROF_OTHER, false);
 400         BT_MBOX_PRINT(0, CHL_SEQ_N, false);
 401         BT_MBOX_PRINT(0, INBAND_S, false);
 402         BT_MBOX_PRINT(0, LE_MIN_RSSI, false);
 403         BT_MBOX_PRINT(0, LE_SCAN, false);
 404         BT_MBOX_PRINT(0, LE_ADV, false);
 405         BT_MBOX_PRINT(0, LE_MAX_TX_POWER, false);
 406         BT_MBOX_PRINT(0, OPEN_CON_1, true);
 407
 408         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw1:\n");
 409
 410         BT_MBOX_PRINT(1, BR_MAX_TX_POWER, false);
 411         BT_MBOX_PRINT(1, IP_SR, false);
 412         BT_MBOX_PRINT(1, LE_MSTR, false);
 413         BT_MBOX_PRINT(1, AGGR_TRFC_LD, false);
 414         BT_MBOX_PRINT(1, MSG_TYPE, false);
 415         BT_MBOX_PRINT(1, SSN, true);
 416
 417         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw2:\n");
 418
 419         BT_MBOX_PRINT(2, SNIFF_ACT, false);
 420         BT_MBOX_PRINT(2, PAG, false);
 421         BT_MBOX_PRINT(2, INQUIRY, false);
 422         BT_MBOX_PRINT(2, CONN, false);
 423         BT_MBOX_PRINT(2, SNIFF_INTERVAL, false);
 424         BT_MBOX_PRINT(2, DISC, false);
 425         BT_MBOX_PRINT(2, SCO_TX_ACT, false);
 426         BT_MBOX_PRINT(2, SCO_RX_ACT, false);
 427         BT_MBOX_PRINT(2, ESCO_RE_TX, false);
 428         BT_MBOX_PRINT(2, SCO_DURATION, true);
 429
 430         pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw3:\n");
 431
 432         BT_MBOX_PRINT(3, SCO_STATE, false);
 433         BT_MBOX_PRINT(3, SNIFF_STATE, false);
 434         BT_MBOX_PRINT(3, A2DP_STATE, false);
 435         BT_MBOX_PRINT(3, ACL_STATE, false);
 436         BT_MBOX_PRINT(3, MSTR_STATE, false);
 437         BT_MBOX_PRINT(3, OBX_STATE, false);
 438         BT_MBOX_PRINT(3, OPEN_CON_2, false);
 439         BT_MBOX_PRINT(3, TRAFFIC_LOAD, false);
 440         BT_MBOX_PRINT(3, CHL_SEQN_LSB, false);
 441         BT_MBOX_PRINT(3, INBAND_P, false);
 442         BT_MBOX_PRINT(3, MSG_TYPE_2, false);
 443         BT_MBOX_PRINT(3, SSN_2, false);
 444         BT_MBOX_PRINT(3, UPDATE_REQUEST, true);
 445
 446         pos += scnprintf(buf+pos, bufsz-pos, "bt_status = %d\n",
 447                                          notif->bt_status);
 448         pos += scnprintf(buf+pos, bufsz-pos, "bt_open_conn = %d\n",
 449                                          notif->bt_open_conn);
 450         pos += scnprintf(buf+pos, bufsz-pos, "bt_traffic_load = %d\n",
 451                                          notif->bt_traffic_load);
 452         pos += scnprintf(buf+pos, bufsz-pos, "bt_agg_traffic_load = %d\n",
 453                                          notif->bt_agg_traffic_load);
 454         pos += scnprintf(buf+pos, bufsz-pos, "bt_ci_compliance = %d\n",
 455                                          notif->bt_ci_compliance);
 456
 457         mutex_unlock(&mvm->mutex);
 458
 459         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 460         kfree(buf);
 461
 462         return ret;
 463 }
 464 #undef BT_MBOX_PRINT
 465
 466 static ssize_t iwl_dbgfs_fw_restart_write(struct file *file,
 467                                           const char __user *user_buf,
 468                                           size_t count, loff_t *ppos)
 469 {
 470         struct iwl_mvm *mvm = file->private_data;
 471         bool restart_fw = iwlwifi_mod_params.restart_fw;
 472         int ret;
 473
 474         iwlwifi_mod_params.restart_fw = true;
 475
 476         mutex_lock(&mvm->mutex);
 477
 478         /* take the return value to make compiler happy - it will fail anyway */
 479         ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_ERROR, CMD_SYNC, 0, NULL);
 480
 481         mutex_unlock(&mvm->mutex);
 482
 483         iwlwifi_mod_params.restart_fw = restart_fw;
 484
 485         return count;
 486 }
 487
 488 #define MVM_DEBUGFS_READ_FILE_OPS(name)                                 \
 489 static const struct file_operations iwl_dbgfs_##name##_ops = {  \
 490         .read = iwl_dbgfs_##name##_read,                                \
 491         .open = simple_open,                                            \
 492         .llseek = generic_file_llseek,                                  \
 493 }
 494
 495 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name)                           \
 496 static const struct file_operations iwl_dbgfs_##name##_ops = {  \
 497         .write = iwl_dbgfs_##name##_write,                              \
 498         .read = iwl_dbgfs_##name##_read,                                \
 499         .open = simple_open,                                            \
 500         .llseek = generic_file_llseek,                                  \
 501 };
 502
 503 #define MVM_DEBUGFS_WRITE_FILE_OPS(name)                                \
 504 static const struct file_operations iwl_dbgfs_##name##_ops = {  \
 505         .write = iwl_dbgfs_##name##_write,                              \
 506         .open = simple_open,                                            \
 507         .llseek = generic_file_llseek,                                  \
 508 };
 509
 510 #define MVM_DEBUGFS_ADD_FILE(name, parent, mode) do {                   \
 511                 if (!debugfs_create_file(#name, mode, parent, mvm,      \
 512                                          &iwl_dbgfs_##name##_ops))      \
 513                         goto err;                                       \
 514         } while (0)
 515
 516 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {               \
 517                 if (!debugfs_create_file(#name, mode, parent, vif,      \
 518                                          &iwl_dbgfs_##name##_ops))      \
 519                         goto err;                                       \
 520         } while (0)
 521
 522 /* Device wide debugfs entries */
 523 MVM_DEBUGFS_WRITE_FILE_OPS(tx_flush);
 524 MVM_DEBUGFS_WRITE_FILE_OPS(sta_drain);
 525 MVM_DEBUGFS_READ_WRITE_FILE_OPS(sram);
 526 MVM_DEBUGFS_READ_FILE_OPS(stations);
 527 MVM_DEBUGFS_READ_FILE_OPS(bt_notif);
 528 MVM_DEBUGFS_WRITE_FILE_OPS(power_down_allow);
 529 MVM_DEBUGFS_WRITE_FILE_OPS(power_down_d3_allow);
 530 MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart);
 531
 532 /* Interface specific debugfs entries */
 533 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 534
 535 int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
 536 {
 537         char buf[100];
 538
 539         mvm->debugfs_dir = dbgfs_dir;
 540
 541         MVM_DEBUGFS_ADD_FILE(tx_flush, mvm->debugfs_dir, S_IWUSR);
 542         MVM_DEBUGFS_ADD_FILE(sta_drain, mvm->debugfs_dir, S_IWUSR);
 543         MVM_DEBUGFS_ADD_FILE(sram, mvm->debugfs_dir, S_IWUSR | S_IRUSR);
 544         MVM_DEBUGFS_ADD_FILE(stations, dbgfs_dir, S_IRUSR);
 545         MVM_DEBUGFS_ADD_FILE(bt_notif, dbgfs_dir, S_IRUSR);
 546         MVM_DEBUGFS_ADD_FILE(power_down_allow, mvm->debugfs_dir, S_IWUSR);
 547         MVM_DEBUGFS_ADD_FILE(power_down_d3_allow, mvm->debugfs_dir, S_IWUSR);
 548         MVM_DEBUGFS_ADD_FILE(fw_restart, mvm->debugfs_dir, S_IWUSR);
 549
 550         /*
 551          * Create a symlink with mac80211. It will be removed when mac80211
 552          * exists (before the opmode exists which removes the target.)
 553          */
 554         snprintf(buf, 100, "../../%s/%s",
 555                  dbgfs_dir->d_parent->d_parent->d_name.name,
 556                  dbgfs_dir->d_parent->d_name.name);
 557         if (!debugfs_create_symlink("iwlwifi", mvm->hw->wiphy->debugfsdir, buf))
 558                 goto err;
 559
 560         return 0;
 561 err:
 562         IWL_ERR(mvm, "Can't create the mvm debugfs directory\n");
 563         return -ENOMEM;
 564 }
 565
 566 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 567 {
 568         struct dentry *dbgfs_dir = vif->debugfs_dir;
 569         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 570         char buf[100];
 571
 572         if (!dbgfs_dir)
 573                 return;
 574
 575         mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 576         mvmvif->dbgfs_data = mvm;
 577
 578         if (!mvmvif->dbgfs_dir) {
 579                 IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
 580                         dbgfs_dir->d_name.name);
 581                 return;
 582         }
 583
 584         MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir,
 585                                  S_IRUSR);
 586
 587         /*
 588          * Create symlink for convenience pointing to interface specific
 589          * debugfs entries for the driver. For example, under
 590          * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
 591          * find
 592          * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
 593          */
 594         snprintf(buf, 100, "../../../%s/%s/%s/%s",
 595                  dbgfs_dir->d_parent->d_parent->d_name.name,
 596                  dbgfs_dir->d_parent->d_name.name,
 597                  dbgfs_dir->d_name.name,
 598                  mvmvif->dbgfs_dir->d_name.name);
 599
 600         mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
 601                                                      mvm->debugfs_dir, buf);
 602         if (!mvmvif->dbgfs_slink)
 603                 IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
 604                         dbgfs_dir->d_name.name);
 605         return;
 606 err:
 607         IWL_ERR(mvm, "Can't create debugfs entity\n");
 608 }
 609
 610 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 611 {
 612         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 613
 614         debugfs_remove(mvmvif->dbgfs_slink);
 615         mvmvif->dbgfs_slink = NULL;
 616
 617         debugfs_remove_recursive(mvmvif->dbgfs_dir);
 618         mvmvif->dbgfs_dir = NULL;
 619 }