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_READ_WRITE_FILE_OPS(name)                               \
  96         DEBUGFS_READ_FUNC(name);                                        \
  97         DEBUGFS_WRITE_FUNC(name);                                       \
  98 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
  99         .write = iwl_dbgfs_##name##_write,                              \
 100         .read = iwl_dbgfs_##name##_read,                                \
 101         .open = iwl_dbgfs_open_file_generic,                            \
 102 };
 103
 104
 105 static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
 106                                                 char __user *user_buf,
 107                                                 size_t count, loff_t *ppos) {
 108
 109         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 110         char buf[256];
 111         int pos = 0;
 112         const size_t bufsz = sizeof(buf);
 113
 114         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 115                                                 priv->tx_stats[0].cnt);
 116         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 117                                                 priv->tx_stats[1].cnt);
 118         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 119                                                 priv->tx_stats[2].cnt);
 120
 121         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 122 }
 123
 124 static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
 125                                                 char __user *user_buf,
 126                                                 size_t count, loff_t *ppos) {
 127
 128         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 129         char buf[256];
 130         int pos = 0;
 131         const size_t bufsz = sizeof(buf);
 132
 133         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 134                                                 priv->rx_stats[0].cnt);
 135         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 136                                                 priv->rx_stats[1].cnt);
 137         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 138                                                 priv->rx_stats[2].cnt);
 139
 140         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 141 }
 142
 143 #define BYTE1_MASK 0x000000ff;
 144 #define BYTE2_MASK 0x0000ffff;
 145 #define BYTE3_MASK 0x00ffffff;
 146 static ssize_t iwl_dbgfs_sram_read(struct file *file,
 147                                         char __user *user_buf,
 148                                         size_t count, loff_t *ppos)
 149 {
 150         u32 val;
 151         char buf[1024];
 152         ssize_t ret;
 153         int i;
 154         int pos = 0;
 155         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 156         const size_t bufsz = sizeof(buf);
 157
 158         printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
 159         priv->dbgfs->sram_offset, priv->dbgfs->sram_len);
 160
 161         iwl_grab_nic_access(priv);
 162         for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
 163                 val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
 164                                         priv->dbgfs->sram_len - i);
 165                 if (i < 4) {
 166                         switch (i) {
 167                         case 1:
 168                                 val &= BYTE1_MASK;
 169                                 break;
 170                         case 2:
 171                                 val &= BYTE2_MASK;
 172                                 break;
 173                         case 3:
 174                                 val &= BYTE3_MASK;
 175                                 break;
 176                         }
 177                 }
 178                 pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
 179         }
 180         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 181         iwl_release_nic_access(priv);
 182
 183         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 184         return ret;
 185 }
 186
 187 static ssize_t iwl_dbgfs_sram_write(struct file *file,
 188                                         const char __user *user_buf,
 189                                         size_t count, loff_t *ppos)
 190 {
 191         struct iwl_priv *priv = file->private_data;
 192         char buf[64];
 193         int buf_size;
 194         u32 offset, len;
 195
 196         memset(buf, 0, sizeof(buf));
 197         buf_size = min(count, sizeof(buf) -  1);
 198         if (copy_from_user(buf, user_buf, buf_size))
 199                 return -EFAULT;
 200
 201         if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
 202                 priv->dbgfs->sram_offset = offset;
 203                 priv->dbgfs->sram_len = len;
 204         } else {
 205                 priv->dbgfs->sram_offset = 0;
 206                 priv->dbgfs->sram_len = 0;
 207         }
 208
 209         return count;
 210 }
 211
 212 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
 213                                         size_t count, loff_t *ppos)
 214 {
 215         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 216         struct iwl_station_entry *station;
 217         int max_sta = priv->hw_params.max_stations;
 218         char *buf;
 219         int i, j, pos = 0;
 220         ssize_t ret;
 221         /* Add 30 for initial string */
 222         const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
 223         DECLARE_MAC_BUF(mac);
 224
 225         buf = kmalloc(bufsz, GFP_KERNEL);
 226         if(!buf)
 227                 return -ENOMEM;
 228
 229         pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n",
 230                         priv->num_stations);
 231
 232         for (i = 0; i < max_sta; i++) {
 233                 station = &priv->stations[i];
 234                 if (station->used) {
 235                         pos += scnprintf(buf + pos, bufsz - pos,
 236                                         "station %d:\ngeneral data:\n", i+1);
 237                         print_mac(mac, station->sta.sta.addr);
 238                         pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
 239                                         station->sta.sta.sta_id);
 240                         pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
 241                                         station->sta.mode);
 242                         pos += scnprintf(buf + pos, bufsz - pos,
 243                                         "flags: 0x%x\n",
 244                                         station->sta.station_flags_msk);
 245                         pos += scnprintf(buf + pos, bufsz - pos,
 246                                         "ps_status: %u\n", station->ps_status);
 247                         pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
 248                         pos += scnprintf(buf + pos, bufsz - pos,
 249                                         "seq_num\t\ttxq_id");
 250 #ifdef CONFIG_IWL4965_HT
 251                         pos += scnprintf(buf + pos, bufsz - pos,
 252                                         "\tframe_count\twait_for_ba\t");
 253                         pos += scnprintf(buf + pos, bufsz - pos,
 254                                         "start_idx\tbitmap0\t");
 255                         pos += scnprintf(buf + pos, bufsz - pos,
 256                                         "bitmap1\trate_n_flags");
 257 #endif
 258                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 259
 260                         for (j = 0; j < MAX_TID_COUNT; j++) {
 261                                 pos += scnprintf(buf + pos, bufsz - pos,
 262                                                 "[%d]:\t\t%u", j,
 263                                                 station->tid[j].seq_number);
 264 #ifdef CONFIG_IWL4965_HT
 265                                 pos += scnprintf(buf + pos, bufsz - pos,
 266                                                 "\t%u\t\t%u\t\t%u\t\t",
 267                                                 station->tid[j].agg.txq_id,
 268                                                 station->tid[j].agg.frame_count,
 269                                                 station->tid[j].agg.wait_for_ba);
 270                                 pos += scnprintf(buf + pos, bufsz - pos,
 271                                                 "%u\t%llu\t%u",
 272                                                 station->tid[j].agg.start_idx,
 273                                                 (unsigned long long)station->tid[j].agg.bitmap,
 274                                                 station->tid[j].agg.rate_n_flags);
 275 #endif
 276                                 pos += scnprintf(buf + pos, bufsz - pos, "\n");
 277                         }
 278                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 279                 }
 280         }
 281
 282         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 283         kfree(buf);
 284         return ret;
 285 }
 286
 287 static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
 288                                        char __user *user_buf,
 289                                        size_t count,
 290                                        loff_t *ppos)
 291 {
 292         ssize_t ret;
 293         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 294         int pos = 0, ofs = 0, buf_size = 0;
 295         const u8 *ptr;
 296         char *buf;
 297         size_t eeprom_len = priv->cfg->eeprom_size;
 298         buf_size = 4 * eeprom_len + 256;
 299
 300         if (eeprom_len % 16) {
 301                 IWL_ERROR("EEPROM size is not multiple of 16.\n");
 302                 return -ENODATA;
 303         }
 304
 305         /* 4 characters for byte 0xYY */
 306         buf = kzalloc(buf_size, GFP_KERNEL);
 307         if (!buf) {
 308                 IWL_ERROR("Can not allocate Buffer\n");
 309                 return -ENOMEM;
 310         }
 311
 312         ptr = priv->eeprom;
 313         for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
 314                 pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
 315                 hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
 316                                    buf_size - pos, 0);
 317                 pos += strlen(buf);
 318                 if (buf_size - pos > 0)
 319                         buf[pos++] = '\n';
 320         }
 321
 322         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 323         kfree(buf);
 324         return ret;
 325 }
 326
 327 DEBUGFS_READ_WRITE_FILE_OPS(sram);
 328 DEBUGFS_READ_FILE_OPS(eeprom);
 329 DEBUGFS_READ_FILE_OPS(stations);
 330 DEBUGFS_READ_FILE_OPS(rx_statistics);
 331 DEBUGFS_READ_FILE_OPS(tx_statistics);
 332
 333 /*
 334  * Create the debugfs files and directories
 335  *
 336  */
 337 int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 338 {
 339         struct iwl_debugfs *dbgfs;
 340
 341         dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
 342         if (!dbgfs) {
 343                 goto err;
 344         }
 345
 346         priv->dbgfs = dbgfs;
 347         dbgfs->name = name;
 348         dbgfs->dir_drv = debugfs_create_dir(name, NULL);
 349         if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)){
 350                 goto err;
 351         }
 352
 353         DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
 354         DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
 355         DEBUGFS_ADD_FILE(eeprom, data);
 356         DEBUGFS_ADD_FILE(sram, data);
 357         DEBUGFS_ADD_FILE(stations, data);
 358         DEBUGFS_ADD_FILE(rx_statistics, data);
 359         DEBUGFS_ADD_FILE(tx_statistics, data);
 360 #ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
 361         DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
 362         DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
 363                          &priv->disable_chain_noise_cal);
 364 #endif  /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
 365         return 0;
 366
 367 err:
 368         IWL_ERROR("Can't open the debugfs directory\n");
 369         iwl_dbgfs_unregister(priv);
 370         return -ENOENT;
 371 }
 372 EXPORT_SYMBOL(iwl_dbgfs_register);
 373
 374 /**
 375  * Remove the debugfs files and directories
 376  *
 377  */
 378 void iwl_dbgfs_unregister(struct iwl_priv *priv)
 379 {
 380         if (!(priv->dbgfs))
 381                 return;
 382
 383         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
 384         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
 385         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
 386         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
 387         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
 388         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
 389 #ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
 390         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
 391         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
 392 #endif /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
 393         DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
 394         DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
 395         kfree(priv->dbgfs);
 396         priv->dbgfs = NULL;
 397 }
 398 EXPORT_SYMBOL(iwl_dbgfs_unregister);
 399
 400
 401