err.no Git - linux-2.6/blob - 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-4965.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_REMOVE(name)  do {              \
  59         debugfs_remove(name);                   \
  60         name = NULL;                            \
  61 } while (0);
  62
  63 /* file operation */
  64 #define DEBUGFS_READ_FUNC(name)                                         \
  65 static ssize_t iwl_dbgfs_##name##_read(struct file *file,               \
  66                                         char __user *user_buf,          \
  67                                         size_t count, loff_t *ppos);
  68
  69 #define DEBUGFS_WRITE_FUNC(name)                                        \
  70 static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
  71                                         const char __user *user_buf,    \
  72                                         size_t count, loff_t *ppos);
  73
  74
  75 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
  76 {
  77         file->private_data = inode->i_private;
  78         return 0;
  79 }
  80
  81 #define DEBUGFS_READ_FILE_OPS(name)                                     \
  82         DEBUGFS_READ_FUNC(name);                                        \
  83 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
  84         .read = iwl_dbgfs_##name##_read,                                \
  85         .open = iwl_dbgfs_open_file_generic,                            \
  86 };
  87
  88 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
  89         DEBUGFS_READ_FUNC(name);                                        \
  90         DEBUGFS_WRITE_FUNC(name);                                       \
  91 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
  92         .write = iwl_dbgfs_##name##_write,                              \
  93         .read = iwl_dbgfs_##name##_read,                                \
  94         .open = iwl_dbgfs_open_file_generic,                            \
  95 };
  96
  97
  98 static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
  99                                                 char __user *user_buf,
 100                                                 size_t count, loff_t *ppos) {
 101
 102         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 103         char buf[256];
 104         int pos = 0;
 105
 106         pos += sprintf(buf+pos, "mgmt: %u\n", priv->tx_stats[0].cnt);
 107         pos += sprintf(buf+pos, "ctrl: %u\n", priv->tx_stats[1].cnt);
 108         pos += sprintf(buf+pos, "data: %u\n", priv->tx_stats[2].cnt);
 109
 110         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 111 }
 112
 113 static ssize_t iwl_dbgfs_rx_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
 121         pos += sprintf(buf+pos, "mgmt: %u\n", priv->rx_stats[0].cnt);
 122         pos += sprintf(buf+pos, "ctrl: %u\n", priv->rx_stats[1].cnt);
 123         pos += sprintf(buf+pos, "data: %u\n", priv->rx_stats[2].cnt);
 124
 125         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 126 }
 127
 128 #define BYTE1_MASK 0x000000ff;
 129 #define BYTE2_MASK 0x0000ffff;
 130 #define BYTE3_MASK 0x00ffffff;
 131 static ssize_t iwl_dbgfs_sram_read(struct file *file,
 132                                         char __user *user_buf,
 133                                         size_t count, loff_t *ppos)
 134 {
 135         u32 val;
 136         char buf[1024];
 137         ssize_t ret;
 138         int i;
 139         int pos = 0;
 140         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 141
 142         printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
 143         priv->dbgfs->sram_offset, priv->dbgfs->sram_len);
 144
 145         iwl_grab_nic_access(priv);
 146         for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
 147                 val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
 148                                         priv->dbgfs->sram_len - i);
 149                 if (i < 4) {
 150                         switch (i) {
 151                         case 1:
 152                                 val &= BYTE1_MASK;
 153                                 break;
 154                         case 2:
 155                                 val &= BYTE2_MASK;
 156                                 break;
 157                         case 3:
 158                                 val &= BYTE3_MASK;
 159                                 break;
 160                         }
 161                 }
 162                 pos += sprintf(buf+pos, "0x%08x ", val);
 163         }
 164         pos += sprintf(buf+pos, "\n");
 165         iwl_release_nic_access(priv);
 166
 167         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 168         return ret;
 169 }
 170
 171 static ssize_t iwl_dbgfs_sram_write(struct file *file,
 172                                         const char __user *user_buf,
 173                                         size_t count, loff_t *ppos)
 174 {
 175         struct iwl_priv *priv = file->private_data;
 176         char buf[64];
 177         int buf_size;
 178         u32 offset, len;
 179
 180         memset(buf, 0, sizeof(buf));
 181         buf_size = min(count, sizeof(buf) -  1);
 182         if (copy_from_user(buf, user_buf, buf_size))
 183                 return -EFAULT;
 184
 185         if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
 186                 priv->dbgfs->sram_offset = offset;
 187                 priv->dbgfs->sram_len = len;
 188         } else {
 189                 priv->dbgfs->sram_offset = 0;
 190                 priv->dbgfs->sram_len = 0;
 191         }
 192
 193         return count;
 194 }
 195
 196 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
 197                                         size_t count, loff_t *ppos)
 198 {
 199         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 200         struct iwl4965_station_entry *station;
 201         int max_sta = priv->hw_setting.max_stations;
 202         char *buf;
 203         int i, j, pos = 0;
 204         ssize_t ret;
 205         /* Add 30 for initial string */
 206         const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
 207         DECLARE_MAC_BUF(mac);
 208
 209         buf = kmalloc(bufsz, GFP_KERNEL);
 210         if(!buf)
 211                 return -ENOMEM;
 212
 213         pos += sprintf(buf+pos, "num of stations: %d\n\n",
 214                         priv->num_stations);
 215
 216         for (i = 0; i < max_sta; i++) {
 217                 station = &priv->stations[i];
 218                 if (station->used) {
 219                         pos += sprintf(buf+pos, "station %d:\ngeneral data:\n",
 220                                         i+1);
 221                         print_mac(mac, station->sta.sta.addr);
 222                         pos += sprintf(buf+pos, "id: %u\n",
 223                                         station->sta.sta.sta_id);
 224                         pos += sprintf(buf+pos, "mode: %u\n",
 225                                         station->sta.mode);
 226                         pos += sprintf(buf+pos, "flags: 0x%x\n",
 227                                         station->sta.station_flags_msk);
 228                         pos += sprintf(buf+pos, "ps_status: %u\n",
 229                                         station->ps_status);
 230
 231                         pos += sprintf(buf+pos, "tid data:\n");
 232
 233                         pos += sprintf(buf+pos, "seq_num\t\ttxq_id\t");
 234                         pos += sprintf(buf+pos, "frame_count\twait_for_ba\t");
 235                         pos += sprintf(buf+pos, "start_idx\tbitmap0\t");
 236                         pos += sprintf(buf+pos, "bitmap1\trate_n_flags\n");
 237
 238                         for (j = 0; j < MAX_TID_COUNT; j++) {
 239                                 pos += sprintf(buf+pos, "[%d]:\t\t%u\t",
 240                                                 j, station->tid[j].seq_number);
 241                                 pos += sprintf(buf+pos, "%u\t\t%u\t\t%u\t\t",
 242                                                 station->tid[j].agg.txq_id,
 243                                                 station->tid[j].agg.frame_count,
 244                                                 station->tid[j].agg.wait_for_ba);
 245                                 pos += sprintf(buf+pos, "%u\t%llu\t%u\n",
 246                                                 station->tid[j].agg.start_idx,
 247                                                 (unsigned long long)station->tid[j].agg.bitmap,
 248                                                 station->tid[j].agg.rate_n_flags);
 249                         }
 250                         pos += sprintf(buf+pos, "\n");
 251                 }
 252         }
 253
 254         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 255         kfree(buf);
 256         return ret;
 257 }
 258
 259
 260 DEBUGFS_READ_WRITE_FILE_OPS(sram);
 261 DEBUGFS_READ_FILE_OPS(stations);
 262 DEBUGFS_READ_FILE_OPS(rx_statistics);
 263 DEBUGFS_READ_FILE_OPS(tx_statistics);
 264
 265 /*
 266  * Create the debugfs files and directories
 267  *
 268  */
 269 int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 270 {
 271         struct iwl_debugfs *dbgfs;
 272
 273         dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
 274         if (!dbgfs) {
 275                 goto err;
 276         }
 277
 278         priv->dbgfs = dbgfs;
 279         dbgfs->name = name;
 280         dbgfs->dir_drv = debugfs_create_dir(name, NULL);
 281         if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)){
 282                 goto err;
 283         }
 284
 285         DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
 286         DEBUGFS_ADD_FILE(sram, data);
 287         DEBUGFS_ADD_FILE(stations, data);
 288         DEBUGFS_ADD_FILE(rx_statistics, data);
 289         DEBUGFS_ADD_FILE(tx_statistics, data);
 290
 291         return 0;
 292
 293 err:
 294         IWL_ERROR("Can't open the debugfs directory\n");
 295         iwl_dbgfs_unregister(priv);
 296         return -ENOENT;
 297 }
 298 EXPORT_SYMBOL(iwl_dbgfs_register);
 299
 300 /**
 301  * Remove the debugfs files and directories
 302  *
 303  */
 304 void iwl_dbgfs_unregister(struct iwl_priv *priv)
 305 {
 306         if (!(priv->dbgfs))
 307                 return;
 308
 309         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
 310         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
 311         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
 312         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
 313         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
 314         DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
 315         kfree(priv->dbgfs);
 316         priv->dbgfs = NULL;
 317 }
 318 EXPORT_SYMBOL(iwl_dbgfs_unregister);
 319
 320