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                         || !dbgfs->dbgfs_##parent##_files.file_##name)  \
  63                 goto err;                                               \
  64 } while (0)
  65
  66 #define DEBUGFS_REMOVE(name)  do {              \
  67         debugfs_remove(name);                   \
  68         name = NULL;                            \
  69 } while (0);
  70
  71 /* file operation */
  72 #define DEBUGFS_READ_FUNC(name)                                         \
  73 static ssize_t iwl_dbgfs_##name##_read(struct file *file,               \
  74                                         char __user *user_buf,          \
  75                                         size_t count, loff_t *ppos);
  76
  77 #define DEBUGFS_WRITE_FUNC(name)                                        \
  78 static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
  79                                         const char __user *user_buf,    \
  80                                         size_t count, loff_t *ppos);
  81
  82
  83 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
  84 {
  85         file->private_data = inode->i_private;
  86         return 0;
  87 }
  88
  89 #define DEBUGFS_READ_FILE_OPS(name)                                     \
  90         DEBUGFS_READ_FUNC(name);                                        \
  91 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
  92         .read = iwl_dbgfs_##name##_read,                                \
  93         .open = iwl_dbgfs_open_file_generic,                            \
  94 };
  95
  96 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
  97         DEBUGFS_WRITE_FUNC(name);                                       \
  98 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
  99         .write = iwl_dbgfs_##name##_write,                              \
 100         .open = iwl_dbgfs_open_file_generic,                            \
 101 };
 102
 103
 104 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
 105         DEBUGFS_READ_FUNC(name);                                        \
 106         DEBUGFS_WRITE_FUNC(name);                                       \
 107 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
 108         .write = iwl_dbgfs_##name##_write,                              \
 109         .read = iwl_dbgfs_##name##_read,                                \
 110         .open = iwl_dbgfs_open_file_generic,                            \
 111 };
 112
 113
 114 static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
 115                                                 char __user *user_buf,
 116                                                 size_t count, loff_t *ppos) {
 117
 118         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 119         char buf[256];
 120         int pos = 0;
 121         const size_t bufsz = sizeof(buf);
 122
 123         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 124                                                 priv->tx_stats[0].cnt);
 125         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 126                                                 priv->tx_stats[1].cnt);
 127         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 128                                                 priv->tx_stats[2].cnt);
 129
 130         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 131 }
 132
 133 static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
 134                                                 char __user *user_buf,
 135                                                 size_t count, loff_t *ppos) {
 136
 137         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 138         char buf[256];
 139         int pos = 0;
 140         const size_t bufsz = sizeof(buf);
 141
 142         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 143                                                 priv->rx_stats[0].cnt);
 144         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 145                                                 priv->rx_stats[1].cnt);
 146         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 147                                                 priv->rx_stats[2].cnt);
 148
 149         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 150 }
 151
 152 #define BYTE1_MASK 0x000000ff;
 153 #define BYTE2_MASK 0x0000ffff;
 154 #define BYTE3_MASK 0x00ffffff;
 155 static ssize_t iwl_dbgfs_sram_read(struct file *file,
 156                                         char __user *user_buf,
 157                                         size_t count, loff_t *ppos)
 158 {
 159         u32 val;
 160         char buf[1024];
 161         ssize_t ret;
 162         int i;
 163         int pos = 0;
 164         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 165         const size_t bufsz = sizeof(buf);
 166
 167         printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
 168         priv->dbgfs->sram_offset, priv->dbgfs->sram_len);
 169
 170         iwl_grab_nic_access(priv);
 171         for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
 172                 val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
 173                                         priv->dbgfs->sram_len - i);
 174                 if (i < 4) {
 175                         switch (i) {
 176                         case 1:
 177                                 val &= BYTE1_MASK;
 178                                 break;
 179                         case 2:
 180                                 val &= BYTE2_MASK;
 181                                 break;
 182                         case 3:
 183                                 val &= BYTE3_MASK;
 184                                 break;
 185                         }
 186                 }
 187                 pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
 188         }
 189         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 190         iwl_release_nic_access(priv);
 191
 192         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 193         return ret;
 194 }
 195
 196 static ssize_t iwl_dbgfs_sram_write(struct file *file,
 197                                         const char __user *user_buf,
 198                                         size_t count, loff_t *ppos)
 199 {
 200         struct iwl_priv *priv = file->private_data;
 201         char buf[64];
 202         int buf_size;
 203         u32 offset, len;
 204
 205         memset(buf, 0, sizeof(buf));
 206         buf_size = min(count, sizeof(buf) -  1);
 207         if (copy_from_user(buf, user_buf, buf_size))
 208                 return -EFAULT;
 209
 210         if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
 211                 priv->dbgfs->sram_offset = offset;
 212                 priv->dbgfs->sram_len = len;
 213         } else {
 214                 priv->dbgfs->sram_offset = 0;
 215                 priv->dbgfs->sram_len = 0;
 216         }
 217
 218         return count;
 219 }
 220
 221 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
 222                                         size_t count, loff_t *ppos)
 223 {
 224         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 225         struct iwl_station_entry *station;
 226         int max_sta = priv->hw_params.max_stations;
 227         char *buf;
 228         int i, j, pos = 0;
 229         ssize_t ret;
 230         /* Add 30 for initial string */
 231         const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
 232
 233         buf = kmalloc(bufsz, GFP_KERNEL);
 234         if (!buf)
 235                 return -ENOMEM;
 236
 237         pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n",
 238                         priv->num_stations);
 239
 240         for (i = 0; i < max_sta; i++) {
 241                 station = &priv->stations[i];
 242                 if (station->used) {
 243                         pos += scnprintf(buf + pos, bufsz - pos,
 244                                         "station %d:\ngeneral data:\n", i+1);
 245                         pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
 246                                         station->sta.sta.sta_id);
 247                         pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
 248                                         station->sta.mode);
 249                         pos += scnprintf(buf + pos, bufsz - pos,
 250                                         "flags: 0x%x\n",
 251                                         station->sta.station_flags_msk);
 252                         pos += scnprintf(buf + pos, bufsz - pos,
 253                                         "ps_status: %u\n", station->ps_status);
 254                         pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
 255                         pos += scnprintf(buf + pos, bufsz - pos,
 256                                         "seq_num\t\ttxq_id");
 257                         pos += scnprintf(buf + pos, bufsz - pos,
 258                                         "\tframe_count\twait_for_ba\t");
 259                         pos += scnprintf(buf + pos, bufsz - pos,
 260                                         "start_idx\tbitmap0\t");
 261                         pos += scnprintf(buf + pos, bufsz - pos,
 262                                         "bitmap1\trate_n_flags");
 263                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 264
 265                         for (j = 0; j < MAX_TID_COUNT; j++) {
 266                                 pos += scnprintf(buf + pos, bufsz - pos,
 267                                                 "[%d]:\t\t%u", j,
 268                                                 station->tid[j].seq_number);
 269                                 pos += scnprintf(buf + pos, bufsz - pos,
 270                                                 "\t%u\t\t%u\t\t%u\t\t",
 271                                                 station->tid[j].agg.txq_id,
 272                                                 station->tid[j].agg.frame_count,
 273                                                 station->tid[j].agg.wait_for_ba);
 274                                 pos += scnprintf(buf + pos, bufsz - pos,
 275                                                 "%u\t%llu\t%u",
 276                                                 station->tid[j].agg.start_idx,
 277                                                 (unsigned long long)station->tid[j].agg.bitmap,
 278                                                 station->tid[j].agg.rate_n_flags);
 279                                 pos += scnprintf(buf + pos, bufsz - pos, "\n");
 280                         }
 281                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 282                 }
 283         }
 284
 285         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 286         kfree(buf);
 287         return ret;
 288 }
 289
 290 static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
 291                                        char __user *user_buf,
 292                                        size_t count,
 293                                        loff_t *ppos)
 294 {
 295         ssize_t ret;
 296         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 297         int pos = 0, ofs = 0, buf_size = 0;
 298         const u8 *ptr;
 299         char *buf;
 300         size_t eeprom_len = priv->cfg->eeprom_size;
 301         buf_size = 4 * eeprom_len + 256;
 302
 303         if (eeprom_len % 16) {
 304                 IWL_ERROR("EEPROM size is not multiple of 16.\n");
 305                 return -ENODATA;
 306         }
 307
 308         /* 4 characters for byte 0xYY */
 309         buf = kzalloc(buf_size, GFP_KERNEL);
 310         if (!buf) {
 311                 IWL_ERROR("Can not allocate Buffer\n");
 312                 return -ENOMEM;
 313         }
 314
 315         ptr = priv->eeprom;
 316         for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
 317                 pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
 318                 hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
 319                                    buf_size - pos, 0);
 320                 pos += strlen(buf);
 321                 if (buf_size - pos > 0)
 322                         buf[pos++] = '\n';
 323         }
 324
 325         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 326         kfree(buf);
 327         return ret;
 328 }
 329
 330 static ssize_t iwl_dbgfs_log_event_write(struct file *file,
 331                                         const char __user *user_buf,
 332                                         size_t count, loff_t *ppos)
 333 {
 334         struct iwl_priv *priv = file->private_data;
 335         u32 event_log_flag;
 336         char buf[8];
 337         int buf_size;
 338
 339         memset(buf, 0, sizeof(buf));
 340         buf_size = min(count, sizeof(buf) -  1);
 341         if (copy_from_user(buf, user_buf, buf_size))
 342                 return -EFAULT;
 343         if (sscanf(buf, "%d", &event_log_flag) != 1)
 344                 return -EFAULT;
 345         if (event_log_flag == 1)
 346                 iwl_dump_nic_event_log(priv);
 347
 348         return count;
 349 }
 350
 351 DEBUGFS_READ_WRITE_FILE_OPS(sram);
 352 DEBUGFS_WRITE_FILE_OPS(log_event);
 353 DEBUGFS_READ_FILE_OPS(eeprom);
 354 DEBUGFS_READ_FILE_OPS(stations);
 355 DEBUGFS_READ_FILE_OPS(rx_statistics);
 356 DEBUGFS_READ_FILE_OPS(tx_statistics);
 357
 358 /*
 359  * Create the debugfs files and directories
 360  *
 361  */
 362 int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 363 {
 364         struct iwl_debugfs *dbgfs;
 365         struct dentry *phyd = priv->hw->wiphy->debugfsdir;
 366         int ret = 0;
 367
 368         dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
 369         if (!dbgfs) {
 370                 ret = -ENOMEM;
 371                 goto err;
 372         }
 373
 374         priv->dbgfs = dbgfs;
 375         dbgfs->name = name;
 376         dbgfs->dir_drv = debugfs_create_dir(name, phyd);
 377         if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)) {
 378                 ret = -ENOENT;
 379                 goto err;
 380         }
 381
 382         DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
 383         DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
 384         DEBUGFS_ADD_FILE(eeprom, data);
 385         DEBUGFS_ADD_FILE(sram, data);
 386         DEBUGFS_ADD_FILE(log_event, data);
 387         DEBUGFS_ADD_FILE(stations, data);
 388         DEBUGFS_ADD_FILE(rx_statistics, data);
 389         DEBUGFS_ADD_FILE(tx_statistics, data);
 390         DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
 391         DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
 392                          &priv->disable_chain_noise_cal);
 393         DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal);
 394         return 0;
 395
 396 err:
 397         IWL_ERROR("Can't open the debugfs directory\n");
 398         iwl_dbgfs_unregister(priv);
 399         return ret;
 400 }
 401 EXPORT_SYMBOL(iwl_dbgfs_register);
 402
 403 /**
 404  * Remove the debugfs files and directories
 405  *
 406  */
 407 void iwl_dbgfs_unregister(struct iwl_priv *priv)
 408 {
 409         if (!priv->dbgfs)
 410                 return;
 411
 412         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
 413         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
 414         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
 415         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
 416         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
 417         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
 418         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
 419         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
 420         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
 421         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
 422         DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
 423         DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
 424         kfree(priv->dbgfs);
 425         priv->dbgfs = NULL;
 426 }
 427 EXPORT_SYMBOL(iwl_dbgfs_unregister);
 428
 429
 430