drivers/net/wireless/iwlwifi/iwl-debugfs.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/debugfs.h>
  32
  33 #include <linux/ieee80211.h>
  34 #include <net/mac80211.h>
  35
  36
  37 #include "iwl-dev.h"
  38 #include "iwl-debug.h"
  39 #include "iwl-core.h"
  40 #include "iwl-io.h"
  41
  42
  43 /* create and remove of files */
  44 #define DEBUGFS_ADD_DIR(name, parent) do {                              \
  45         dbgfs->dir_##name = debugfs_create_dir(#name, parent);          \
  46         if (!(dbgfs->dir_##name))                                       \
  47                 goto err;                                               \
  48 } while (0)
  49
  50 #define DEBUGFS_ADD_FILE(name, parent) do {                             \
  51         dbgfs->dbgfs_##parent##_files.file_##name =                     \
  52         debugfs_create_file(#name, 0644, dbgfs->dir_##parent, priv,     \
  53                                 &iwl_dbgfs_##name##_ops);               \
  54         if (!(dbgfs->dbgfs_##parent##_files.file_##name))               \
  55                 goto err;                                               \
  56 } while (0)
  57
  58 #define DEBUGFS_ADD_BOOL(name, parent, ptr) do {                        \
  59         dbgfs->dbgfs_##parent##_files.file_##name =                     \
  60         debugfs_create_bool(#name, 0644, dbgfs->dir_##parent, ptr);     \
  61         if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name)           \
  62                         || !dbgfs->dbgfs_##parent##_files.file_##name)  \
  63                 goto err;                                               \
  64 } while (0)
  65
  66 #define DEBUGFS_ADD_X32(name, parent, ptr) do {                        \
  67         dbgfs->dbgfs_##parent##_files.file_##name =                     \
  68         debugfs_create_x32(#name, 0444, dbgfs->dir_##parent, ptr);     \
  69         if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name)           \
  70                         || !dbgfs->dbgfs_##parent##_files.file_##name)  \
  71                 goto err;                                               \
  72 } while (0)
  73
  74 #define DEBUGFS_REMOVE(name)  do {              \
  75         debugfs_remove(name);                   \
  76         name = NULL;                            \
  77 } while (0);
  78
  79 /* file operation */
  80 #define DEBUGFS_READ_FUNC(name)                                         \
  81 static ssize_t iwl_dbgfs_##name##_read(struct file *file,               \
  82                                         char __user *user_buf,          \
  83                                         size_t count, loff_t *ppos);
  84
  85 #define DEBUGFS_WRITE_FUNC(name)                                        \
  86 static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
  87                                         const char __user *user_buf,    \
  88                                         size_t count, loff_t *ppos);
  89
  90
  91 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
  92 {
  93         file->private_data = inode->i_private;
  94         return 0;
  95 }
  96
  97 #define DEBUGFS_READ_FILE_OPS(name)                                     \
  98         DEBUGFS_READ_FUNC(name);                                        \
  99 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
 100         .read = iwl_dbgfs_##name##_read,                                \
 101         .open = iwl_dbgfs_open_file_generic,                            \
 102 };
 103
 104 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
 105         DEBUGFS_WRITE_FUNC(name);                                       \
 106 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
 107         .write = iwl_dbgfs_##name##_write,                              \
 108         .open = iwl_dbgfs_open_file_generic,                            \
 109 };
 110
 111
 112 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
 113         DEBUGFS_READ_FUNC(name);                                        \
 114         DEBUGFS_WRITE_FUNC(name);                                       \
 115 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
 116         .write = iwl_dbgfs_##name##_write,                              \
 117         .read = iwl_dbgfs_##name##_read,                                \
 118         .open = iwl_dbgfs_open_file_generic,                            \
 119 };
 120
 121
 122 static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
 123                                                 char __user *user_buf,
 124                                                 size_t count, loff_t *ppos) {
 125
 126         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 127         char buf[256];
 128         int pos = 0;
 129         const size_t bufsz = sizeof(buf);
 130
 131         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 132                                                 priv->tx_stats[0].cnt);
 133         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 134                                                 priv->tx_stats[1].cnt);
 135         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 136                                                 priv->tx_stats[2].cnt);
 137
 138         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 139 }
 140
 141 static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
 142                                                 char __user *user_buf,
 143                                                 size_t count, loff_t *ppos) {
 144
 145         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 146         char buf[256];
 147         int pos = 0;
 148         const size_t bufsz = sizeof(buf);
 149
 150         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 151                                                 priv->rx_stats[0].cnt);
 152         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 153                                                 priv->rx_stats[1].cnt);
 154         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 155                                                 priv->rx_stats[2].cnt);
 156
 157         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 158 }
 159
 160 #define BYTE1_MASK 0x000000ff;
 161 #define BYTE2_MASK 0x0000ffff;
 162 #define BYTE3_MASK 0x00ffffff;
 163 static ssize_t iwl_dbgfs_sram_read(struct file *file,
 164                                         char __user *user_buf,
 165                                         size_t count, loff_t *ppos)
 166 {
 167         u32 val;
 168         char buf[1024];
 169         ssize_t ret;
 170         int i;
 171         int pos = 0;
 172         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 173         const size_t bufsz = sizeof(buf);
 174
 175         iwl_grab_nic_access(priv);
 176         for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
 177                 val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
 178                                         priv->dbgfs->sram_len - i);
 179                 if (i < 4) {
 180                         switch (i) {
 181                         case 1:
 182                                 val &= BYTE1_MASK;
 183                                 break;
 184                         case 2:
 185                                 val &= BYTE2_MASK;
 186                                 break;
 187                         case 3:
 188                                 val &= BYTE3_MASK;
 189                                 break;
 190                         }
 191                 }
 192                 pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
 193         }
 194         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 195         iwl_release_nic_access(priv);
 196
 197         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 198         return ret;
 199 }
 200
 201 static ssize_t iwl_dbgfs_sram_write(struct file *file,
 202                                         const char __user *user_buf,
 203                                         size_t count, loff_t *ppos)
 204 {
 205         struct iwl_priv *priv = file->private_data;
 206         char buf[64];
 207         int buf_size;
 208         u32 offset, len;
 209
 210         memset(buf, 0, sizeof(buf));
 211         buf_size = min(count, sizeof(buf) -  1);
 212         if (copy_from_user(buf, user_buf, buf_size))
 213                 return -EFAULT;
 214
 215         if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
 216                 priv->dbgfs->sram_offset = offset;
 217                 priv->dbgfs->sram_len = len;
 218         } else {
 219                 priv->dbgfs->sram_offset = 0;
 220                 priv->dbgfs->sram_len = 0;
 221         }
 222
 223         return count;
 224 }
 225
 226 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
 227                                         size_t count, loff_t *ppos)
 228 {
 229         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 230         struct iwl_station_entry *station;
 231         int max_sta = priv->hw_params.max_stations;
 232         char *buf;
 233         int i, j, pos = 0;
 234         ssize_t ret;
 235         /* Add 30 for initial string */
 236         const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
 237
 238         buf = kmalloc(bufsz, GFP_KERNEL);
 239         if (!buf)
 240                 return -ENOMEM;
 241
 242         pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n",
 243                         priv->num_stations);
 244
 245         for (i = 0; i < max_sta; i++) {
 246                 station = &priv->stations[i];
 247                 if (station->used) {
 248                         pos += scnprintf(buf + pos, bufsz - pos,
 249                                         "station %d:\ngeneral data:\n", i+1);
 250                         pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
 251                                         station->sta.sta.sta_id);
 252                         pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
 253                                         station->sta.mode);
 254                         pos += scnprintf(buf + pos, bufsz - pos,
 255                                         "flags: 0x%x\n",
 256                                         station->sta.station_flags_msk);
 257                         pos += scnprintf(buf + pos, bufsz - pos,
 258                                         "ps_status: %u\n", station->ps_status);
 259                         pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
 260                         pos += scnprintf(buf + pos, bufsz - pos,
 261                                         "seq_num\t\ttxq_id");
 262                         pos += scnprintf(buf + pos, bufsz - pos,
 263                                         "\tframe_count\twait_for_ba\t");
 264                         pos += scnprintf(buf + pos, bufsz - pos,
 265                                         "start_idx\tbitmap0\t");
 266                         pos += scnprintf(buf + pos, bufsz - pos,
 267                                         "bitmap1\trate_n_flags");
 268                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 269
 270                         for (j = 0; j < MAX_TID_COUNT; j++) {
 271                                 pos += scnprintf(buf + pos, bufsz - pos,
 272                                                 "[%d]:\t\t%u", j,
 273                                                 station->tid[j].seq_number);
 274                                 pos += scnprintf(buf + pos, bufsz - pos,
 275                                                 "\t%u\t\t%u\t\t%u\t\t",
 276                                                 station->tid[j].agg.txq_id,
 277                                                 station->tid[j].agg.frame_count,
 278                                                 station->tid[j].agg.wait_for_ba);
 279                                 pos += scnprintf(buf + pos, bufsz - pos,
 280                                                 "%u\t%llu\t%u",
 281                                                 station->tid[j].agg.start_idx,
 282                                                 (unsigned long long)station->tid[j].agg.bitmap,
 283                                                 station->tid[j].agg.rate_n_flags);
 284                                 pos += scnprintf(buf + pos, bufsz - pos, "\n");
 285                         }
 286                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 287                 }
 288         }
 289
 290         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 291         kfree(buf);
 292         return ret;
 293 }
 294
 295 static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
 296                                        char __user *user_buf,
 297                                        size_t count,
 298                                        loff_t *ppos)
 299 {
 300         ssize_t ret;
 301         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 302         int pos = 0, ofs = 0, buf_size = 0;
 303         const u8 *ptr;
 304         char *buf;
 305         size_t eeprom_len = priv->cfg->eeprom_size;
 306         buf_size = 4 * eeprom_len + 256;
 307
 308         if (eeprom_len % 16) {
 309                 IWL_ERR(priv, "EEPROM size is not multiple of 16.\n");
 310                 return -ENODATA;
 311         }
 312
 313         /* 4 characters for byte 0xYY */
 314         buf = kzalloc(buf_size, GFP_KERNEL);
 315         if (!buf) {
 316                 IWL_ERR(priv, "Can not allocate Buffer\n");
 317                 return -ENOMEM;
 318         }
 319
 320         ptr = priv->eeprom;
 321         for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
 322                 pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
 323                 hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
 324                                    buf_size - pos, 0);
 325                 pos += strlen(buf);
 326                 if (buf_size - pos > 0)
 327                         buf[pos++] = '\n';
 328         }
 329
 330         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 331         kfree(buf);
 332         return ret;
 333 }
 334
 335 static ssize_t iwl_dbgfs_log_event_write(struct file *file,
 336                                         const char __user *user_buf,
 337                                         size_t count, loff_t *ppos)
 338 {
 339         struct iwl_priv *priv = file->private_data;
 340         u32 event_log_flag;
 341         char buf[8];
 342         int buf_size;
 343
 344         memset(buf, 0, sizeof(buf));
 345         buf_size = min(count, sizeof(buf) -  1);
 346         if (copy_from_user(buf, user_buf, buf_size))
 347                 return -EFAULT;
 348         if (sscanf(buf, "%d", &event_log_flag) != 1)
 349                 return -EFAULT;
 350         if (event_log_flag == 1)
 351                 iwl_dump_nic_event_log(priv);
 352
 353         return count;
 354 }
 355
 356
 357
 358 static ssize_t iwl_dbgfs_channels_read(struct file *file, char __user *user_buf,
 359                                        size_t count, loff_t *ppos)
 360 {
 361         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 362         struct ieee80211_channel *channels = NULL;
 363         const struct ieee80211_supported_band *supp_band = NULL;
 364         int pos = 0, i, bufsz = PAGE_SIZE;
 365         char *buf;
 366         ssize_t ret;
 367
 368         if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
 369                 return -EAGAIN;
 370
 371         buf = kzalloc(bufsz, GFP_KERNEL);
 372         if (!buf) {
 373                 IWL_ERR(priv, "Can not allocate Buffer\n");
 374                 return -ENOMEM;
 375         }
 376
 377         supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
 378         channels = supp_band->channels;
 379
 380         pos += scnprintf(buf + pos, bufsz - pos,
 381                         "Displaying %d channels in 2.4GHz band 802.11bg):\n",
 382                          supp_band->n_channels);
 383
 384         for (i = 0; i < supp_band->n_channels; i++)
 385                 pos += scnprintf(buf + pos, bufsz - pos,
 386                                 "%d: %ddBm: BSS%s%s, %s.\n",
 387                                 ieee80211_frequency_to_channel(
 388                                 channels[i].center_freq),
 389                                 channels[i].max_power,
 390                                 channels[i].flags & IEEE80211_CHAN_RADAR ?
 391                                 " (IEEE 802.11h required)" : "",
 392                                 (!(channels[i].flags & IEEE80211_CHAN_NO_IBSS)
 393                                 || (channels[i].flags &
 394                                 IEEE80211_CHAN_RADAR)) ? "" :
 395                                 ", IBSS",
 396                                 channels[i].flags &
 397                                 IEEE80211_CHAN_PASSIVE_SCAN ?
 398                                 "passive only" : "active/passive");
 399
 400         supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
 401         channels = supp_band->channels;
 402
 403         pos += scnprintf(buf + pos, bufsz - pos,
 404                         "Displaying %d channels in 5.2GHz band (802.11a)\n",
 405                         supp_band->n_channels);
 406
 407         for (i = 0; i < supp_band->n_channels; i++)
 408                 pos += scnprintf(buf + pos, bufsz - pos,
 409                                 "%d: %ddBm: BSS%s%s, %s.\n",
 410                                 ieee80211_frequency_to_channel(
 411                                 channels[i].center_freq),
 412                                 channels[i].max_power,
 413                                 channels[i].flags & IEEE80211_CHAN_RADAR ?
 414                                 " (IEEE 802.11h required)" : "",
 415                                 ((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
 416                                 || (channels[i].flags &
 417                                 IEEE80211_CHAN_RADAR)) ? "" :
 418                                 ", IBSS",
 419                                 channels[i].flags &
 420                                 IEEE80211_CHAN_PASSIVE_SCAN ?
 421                                 "passive only" : "active/passive");
 422
 423         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 424         kfree(buf);
 425         return ret;
 426 }
 427
 428 DEBUGFS_READ_WRITE_FILE_OPS(sram);
 429 DEBUGFS_WRITE_FILE_OPS(log_event);
 430 DEBUGFS_READ_FILE_OPS(eeprom);
 431 DEBUGFS_READ_FILE_OPS(stations);
 432 DEBUGFS_READ_FILE_OPS(rx_statistics);
 433 DEBUGFS_READ_FILE_OPS(tx_statistics);
 434 DEBUGFS_READ_FILE_OPS(channels);
 435
 436 /*
 437  * Create the debugfs files and directories
 438  *
 439  */
 440 int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 441 {
 442         struct iwl_debugfs *dbgfs;
 443         struct dentry *phyd = priv->hw->wiphy->debugfsdir;
 444         int ret = 0;
 445
 446         dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
 447         if (!dbgfs) {
 448                 ret = -ENOMEM;
 449                 goto err;
 450         }
 451
 452         priv->dbgfs = dbgfs;
 453         dbgfs->name = name;
 454         dbgfs->dir_drv = debugfs_create_dir(name, phyd);
 455         if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)) {
 456                 ret = -ENOENT;
 457                 goto err;
 458         }
 459
 460         DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
 461         DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
 462         DEBUGFS_ADD_FILE(eeprom, data);
 463         DEBUGFS_ADD_FILE(sram, data);
 464         DEBUGFS_ADD_FILE(log_event, data);
 465         DEBUGFS_ADD_FILE(stations, data);
 466         DEBUGFS_ADD_FILE(rx_statistics, data);
 467         DEBUGFS_ADD_FILE(tx_statistics, data);
 468         DEBUGFS_ADD_FILE(channels, data);
 469         DEBUGFS_ADD_X32(status, data, (u32 *)&priv->status);
 470         DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
 471         DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
 472                          &priv->disable_chain_noise_cal);
 473         DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal);
 474         return 0;
 475
 476 err:
 477         IWL_ERR(priv, "Can't open the debugfs directory\n");
 478         iwl_dbgfs_unregister(priv);
 479         return ret;
 480 }
 481 EXPORT_SYMBOL(iwl_dbgfs_register);
 482
 483 /**
 484  * Remove the debugfs files and directories
 485  *
 486  */
 487 void iwl_dbgfs_unregister(struct iwl_priv *priv)
 488 {
 489         if (!priv->dbgfs)
 490                 return;
 491
 492         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
 493         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
 494         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
 495         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
 496         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
 497         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
 498         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_channels);
 499         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
 500         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
 501         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
 502         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
 503         DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
 504         DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
 505         kfree(priv->dbgfs);
 506         priv->dbgfs = NULL;
 507 }
 508 EXPORT_SYMBOL(iwl_dbgfs_unregister);
 509
 510
 511