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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 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  * Tomas Winkler <tomas.winkler@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                 goto err;                                               \
  63 } while (0)
  64
  65 #define DEBUGFS_REMOVE(name)  do {              \
  66         debugfs_remove(name);                   \
  67         name = NULL;                            \
  68 } while (0);
  69
  70 /* file operation */
  71 #define DEBUGFS_READ_FUNC(name)                                         \
  72 static ssize_t iwl_dbgfs_##name##_read(struct file *file,               \
  73                                         char __user *user_buf,          \
  74                                         size_t count, loff_t *ppos);
  75
  76 #define DEBUGFS_WRITE_FUNC(name)                                        \
  77 static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
  78                                         const char __user *user_buf,    \
  79                                         size_t count, loff_t *ppos);
  80
  81
  82 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
  83 {
  84         file->private_data = inode->i_private;
  85         return 0;
  86 }
  87
  88 #define DEBUGFS_READ_FILE_OPS(name)                                     \
  89         DEBUGFS_READ_FUNC(name);                                        \
  90 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
  91         .read = iwl_dbgfs_##name##_read,                                \
  92         .open = iwl_dbgfs_open_file_generic,                            \
  93 };
  94
  95 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
  96         DEBUGFS_WRITE_FUNC(name);                                       \
  97 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
  98         .write = iwl_dbgfs_##name##_write,                              \
  99         .open = iwl_dbgfs_open_file_generic,                            \
 100 };
 101
 102
 103 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
 104         DEBUGFS_READ_FUNC(name);                                        \
 105         DEBUGFS_WRITE_FUNC(name);                                       \
 106 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
 107         .write = iwl_dbgfs_##name##_write,                              \
 108         .read = iwl_dbgfs_##name##_read,                                \
 109         .open = iwl_dbgfs_open_file_generic,                            \
 110 };
 111
 112
 113 static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
 114                                                 char __user *user_buf,
 115                                                 size_t count, loff_t *ppos) {
 116
 117         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 118         char buf[256];
 119         int pos = 0;
 120         const size_t bufsz = sizeof(buf);
 121
 122         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 123                                                 priv->tx_stats[0].cnt);
 124         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 125                                                 priv->tx_stats[1].cnt);
 126         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 127                                                 priv->tx_stats[2].cnt);
 128
 129         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 130 }
 131
 132 static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
 133                                                 char __user *user_buf,
 134                                                 size_t count, loff_t *ppos) {
 135
 136         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 137         char buf[256];
 138         int pos = 0;
 139         const size_t bufsz = sizeof(buf);
 140
 141         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 142                                                 priv->rx_stats[0].cnt);
 143         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 144                                                 priv->rx_stats[1].cnt);
 145         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 146                                                 priv->rx_stats[2].cnt);
 147
 148         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 149 }
 150
 151 #define BYTE1_MASK 0x000000ff;
 152 #define BYTE2_MASK 0x0000ffff;
 153 #define BYTE3_MASK 0x00ffffff;
 154 static ssize_t iwl_dbgfs_sram_read(struct file *file,
 155                                         char __user *user_buf,
 156                                         size_t count, loff_t *ppos)
 157 {
 158         u32 val;
 159         char buf[1024];
 160         ssize_t ret;
 161         int i;
 162         int pos = 0;
 163         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 164         const size_t bufsz = sizeof(buf);
 165
 166         printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
 167         priv->dbgfs->sram_offset, priv->dbgfs->sram_len);
 168
 169         iwl_grab_nic_access(priv);
 170         for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
 171                 val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
 172                                         priv->dbgfs->sram_len - i);
 173                 if (i < 4) {
 174                         switch (i) {
 175                         case 1:
 176                                 val &= BYTE1_MASK;
 177                                 break;
 178                         case 2:
 179                                 val &= BYTE2_MASK;
 180                                 break;
 181                         case 3:
 182                                 val &= BYTE3_MASK;
 183                                 break;
 184                         }
 185                 }
 186                 pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
 187         }
 188         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 189         iwl_release_nic_access(priv);
 190
 191         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 192         return ret;
 193 }
 194
 195 static ssize_t iwl_dbgfs_sram_write(struct file *file,
 196                                         const char __user *user_buf,
 197                                         size_t count, loff_t *ppos)
 198 {
 199         struct iwl_priv *priv = file->private_data;
 200         char buf[64];
 201         int buf_size;
 202         u32 offset, len;
 203
 204         memset(buf, 0, sizeof(buf));
 205         buf_size = min(count, sizeof(buf) -  1);
 206         if (copy_from_user(buf, user_buf, buf_size))
 207                 return -EFAULT;
 208
 209         if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
 210                 priv->dbgfs->sram_offset = offset;
 211                 priv->dbgfs->sram_len = len;
 212         } else {
 213                 priv->dbgfs->sram_offset = 0;
 214                 priv->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_priv *priv = (struct iwl_priv *)file->private_data;
 224         struct iwl_station_entry *station;
 225         int max_sta = priv->hw_params.max_stations;
 226         char *buf;
 227         int i, j, pos = 0;
 228         ssize_t ret;
 229         /* Add 30 for initial string */
 230         const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
 231
 232         buf = kmalloc(bufsz, GFP_KERNEL);
 233         if (!buf)
 234                 return -ENOMEM;
 235
 236         pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n",
 237                         priv->num_stations);
 238
 239         for (i = 0; i < max_sta; i++) {
 240                 station = &priv->stations[i];
 241                 if (station->used) {
 242                         pos += scnprintf(buf + pos, bufsz - pos,
 243                                         "station %d:\ngeneral data:\n", i+1);
 244                         pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
 245                                         station->sta.sta.sta_id);
 246                         pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
 247                                         station->sta.mode);
 248                         pos += scnprintf(buf + pos, bufsz - pos,
 249                                         "flags: 0x%x\n",
 250                                         station->sta.station_flags_msk);
 251                         pos += scnprintf(buf + pos, bufsz - pos,
 252                                         "ps_status: %u\n", station->ps_status);
 253                         pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
 254                         pos += scnprintf(buf + pos, bufsz - pos,
 255                                         "seq_num\t\ttxq_id");
 256                         pos += scnprintf(buf + pos, bufsz - pos,
 257                                         "\tframe_count\twait_for_ba\t");
 258                         pos += scnprintf(buf + pos, bufsz - pos,
 259                                         "start_idx\tbitmap0\t");
 260                         pos += scnprintf(buf + pos, bufsz - pos,
 261                                         "bitmap1\trate_n_flags");
 262                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 263
 264                         for (j = 0; j < MAX_TID_COUNT; j++) {
 265                                 pos += scnprintf(buf + pos, bufsz - pos,
 266                                                 "[%d]:\t\t%u", j,
 267                                                 station->tid[j].seq_number);
 268                                 pos += scnprintf(buf + pos, bufsz - pos,
 269                                                 "\t%u\t\t%u\t\t%u\t\t",
 270                                                 station->tid[j].agg.txq_id,
 271                                                 station->tid[j].agg.frame_count,
 272                                                 station->tid[j].agg.wait_for_ba);
 273                                 pos += scnprintf(buf + pos, bufsz - pos,
 274                                                 "%u\t%llu\t%u",
 275                                                 station->tid[j].agg.start_idx,
 276                                                 (unsigned long long)station->tid[j].agg.bitmap,
 277                                                 station->tid[j].agg.rate_n_flags);
 278                                 pos += scnprintf(buf + pos, bufsz - pos, "\n");
 279                         }
 280                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 281                 }
 282         }
 283
 284         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 285         kfree(buf);
 286         return ret;
 287 }
 288
 289 static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
 290                                        char __user *user_buf,
 291                                        size_t count,
 292                                        loff_t *ppos)
 293 {
 294         ssize_t ret;
 295         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 296         int pos = 0, ofs = 0, buf_size = 0;
 297         const u8 *ptr;
 298         char *buf;
 299         size_t eeprom_len = priv->cfg->eeprom_size;
 300         buf_size = 4 * eeprom_len + 256;
 301
 302         if (eeprom_len % 16) {
 303                 IWL_ERROR("EEPROM size is not multiple of 16.\n");
 304                 return -ENODATA;
 305         }
 306
 307         /* 4 characters for byte 0xYY */
 308         buf = kzalloc(buf_size, GFP_KERNEL);
 309         if (!buf) {
 310                 IWL_ERROR("Can not allocate Buffer\n");
 311                 return -ENOMEM;
 312         }
 313
 314         ptr = priv->eeprom;
 315         for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
 316                 pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
 317                 hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
 318                                    buf_size - pos, 0);
 319                 pos += strlen(buf);
 320                 if (buf_size - pos > 0)
 321                         buf[pos++] = '\n';
 322         }
 323
 324         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 325         kfree(buf);
 326         return ret;
 327 }
 328
 329 static ssize_t iwl_dbgfs_log_event_write(struct file *file,
 330                                         const char __user *user_buf,
 331                                         size_t count, loff_t *ppos)
 332 {
 333         struct iwl_priv *priv = file->private_data;
 334         u32 event_log_flag;
 335         char buf[8];
 336         int buf_size;
 337
 338         memset(buf, 0, sizeof(buf));
 339         buf_size = min(count, sizeof(buf) -  1);
 340         if (copy_from_user(buf, user_buf, buf_size))
 341                 return -EFAULT;
 342         if (sscanf(buf, "%d", &event_log_flag) != 1)
 343                 return -EFAULT;
 344         if (event_log_flag == 1)
 345                 iwl_dump_nic_event_log(priv);
 346
 347         return count;
 348 }
 349
 350 DEBUGFS_READ_WRITE_FILE_OPS(sram);
 351 DEBUGFS_WRITE_FILE_OPS(log_event);
 352 DEBUGFS_READ_FILE_OPS(eeprom);
 353 DEBUGFS_READ_FILE_OPS(stations);
 354 DEBUGFS_READ_FILE_OPS(rx_statistics);
 355 DEBUGFS_READ_FILE_OPS(tx_statistics);
 356
 357 /*
 358  * Create the debugfs files and directories
 359  *
 360  */
 361 int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 362 {
 363         struct iwl_debugfs *dbgfs;
 364         struct dentry *phyd = priv->hw->wiphy->debugfsdir;
 365         int ret = 0;
 366
 367         dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
 368         if (!dbgfs) {
 369                 ret = -ENOMEM;
 370                 goto err;
 371         }
 372
 373         priv->dbgfs = dbgfs;
 374         dbgfs->name = name;
 375         dbgfs->dir_drv = debugfs_create_dir(name, phyd);
 376         if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)) {
 377                 ret = -ENOENT;
 378                 goto err;
 379         }
 380
 381         DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
 382         DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
 383         DEBUGFS_ADD_FILE(eeprom, data);
 384         DEBUGFS_ADD_FILE(sram, data);
 385         DEBUGFS_ADD_FILE(log_event, data);
 386         DEBUGFS_ADD_FILE(stations, data);
 387         DEBUGFS_ADD_FILE(rx_statistics, data);
 388         DEBUGFS_ADD_FILE(tx_statistics, data);
 389         DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
 390         DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
 391                          &priv->disable_chain_noise_cal);
 392         DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal);
 393         return 0;
 394
 395 err:
 396         IWL_ERROR("Can't open the debugfs directory\n");
 397         iwl_dbgfs_unregister(priv);
 398         return ret;
 399 }
 400 EXPORT_SYMBOL(iwl_dbgfs_register);
 401
 402 /**
 403  * Remove the debugfs files and directories
 404  *
 405  */
 406 void iwl_dbgfs_unregister(struct iwl_priv *priv)
 407 {
 408         if (!priv->dbgfs)
 409                 return;
 410
 411         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
 412         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
 413         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
 414         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
 415         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
 416         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
 417         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
 418         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
 419         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
 420         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
 421         DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
 422         DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
 423         kfree(priv->dbgfs);
 424         priv->dbgfs = NULL;
 425 }
 426 EXPORT_SYMBOL(iwl_dbgfs_unregister);
 427
 428
 429