drivers/net/wireless/realtek/rtlwifi/debug.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009-2012  Realtek Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * The full GNU General Public License is included in this distribution in the
  15  * file called LICENSE.
  16  *
  17  * Contact Information:
  18  * wlanfae <wlanfae@realtek.com>
  19  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  20  * Hsinchu 300, Taiwan.
  21  *
  22  * Larry Finger <Larry.Finger@lwfinger.net>
  23  *****************************************************************************/
  24
  25 #include "wifi.h"
  26 #include "cam.h"
  27
  28 #include <linux/moduleparam.h>
  29 #include <linux/vmalloc.h>
  30
  31 #ifdef CONFIG_RTLWIFI_DEBUG
  32 void _rtl_dbg_trace(struct rtl_priv *rtlpriv, u64 comp, int level,
  33                     const char *fmt, ...)
  34 {
  35         if (unlikely((comp & rtlpriv->cfg->mod_params->debug_mask) &&
  36                      level <= rtlpriv->cfg->mod_params->debug_level)) {
  37                 struct va_format vaf;
  38                 va_list args;
  39
  40                 va_start(args, fmt);
  41
  42                 vaf.fmt = fmt;
  43                 vaf.va = &args;
  44
  45                 pr_info(":<%lx> %pV", in_interrupt(), &vaf);
  46
  47                 va_end(args);
  48         }
  49 }
  50 EXPORT_SYMBOL_GPL(_rtl_dbg_trace);
  51
  52 void _rtl_dbg_print(struct rtl_priv *rtlpriv, u64 comp, int level,
  53                     const char *fmt, ...)
  54 {
  55         if (unlikely((comp & rtlpriv->cfg->mod_params->debug_mask) &&
  56                      level <= rtlpriv->cfg->mod_params->debug_level)) {
  57                 struct va_format vaf;
  58                 va_list args;
  59
  60                 va_start(args, fmt);
  61
  62                 vaf.fmt = fmt;
  63                 vaf.va = &args;
  64
  65                 pr_info("%pV", &vaf);
  66
  67                 va_end(args);
  68         }
  69 }
  70 EXPORT_SYMBOL_GPL(_rtl_dbg_print);
  71
  72 void _rtl_dbg_print_data(struct rtl_priv *rtlpriv, u64 comp, int level,
  73                          const char *titlestring,
  74                          const void *hexdata, int hexdatalen)
  75 {
  76         if (unlikely(((comp) & rtlpriv->cfg->mod_params->debug_mask) &&
  77                      ((level) <= rtlpriv->cfg->mod_params->debug_level))) {
  78                 pr_info("In process \"%s\" (pid %i): %s\n",
  79                         current->comm, current->pid, titlestring);
  80                 print_hex_dump_bytes("", DUMP_PREFIX_NONE,
  81                                      hexdata, hexdatalen);
  82         }
  83 }
  84 EXPORT_SYMBOL_GPL(_rtl_dbg_print_data);
  85
  86 struct rtl_debugfs_priv {
  87         struct rtl_priv *rtlpriv;
  88         int (*cb_read)(struct seq_file *m, void *v);
  89         ssize_t (*cb_write)(struct file *filp, const char __user *buffer,
  90                             size_t count, loff_t *loff);
  91         u32 cb_data;
  92 };
  93
  94 static struct dentry *debugfs_topdir;
  95
  96 static int rtl_debug_get_common(struct seq_file *m, void *v)
  97 {
  98         struct rtl_debugfs_priv *debugfs_priv = m->private;
  99
 100         return debugfs_priv->cb_read(m, v);
 101 }
 102
 103 static int dl_debug_open_common(struct inode *inode, struct file *file)
 104 {
 105         return single_open(file, rtl_debug_get_common, inode->i_private);
 106 }
 107
 108 static const struct file_operations file_ops_common = {
 109         .open = dl_debug_open_common,
 110         .read = seq_read,
 111         .llseek = seq_lseek,
 112         .release = seq_release,
 113 };
 114
 115 static int rtl_debug_get_mac_page(struct seq_file *m, void *v)
 116 {
 117         struct rtl_debugfs_priv *debugfs_priv = m->private;
 118         struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
 119         u32 page = debugfs_priv->cb_data;
 120         int i, n;
 121         int max = 0xff;
 122
 123         for (n = 0; n <= max; ) {
 124                 seq_printf(m, "\n%8.8x  ", n + page);
 125                 for (i = 0; i < 4 && n <= max; i++, n += 4)
 126                         seq_printf(m, "%8.8x    ",
 127                                    rtl_read_dword(rtlpriv, (page | n)));
 128         }
 129         seq_puts(m, "\n");
 130         return 0;
 131 }
 132
 133 #define RTL_DEBUG_IMPL_MAC_SERIES(page, addr)                   \
 134 static struct rtl_debugfs_priv rtl_debug_priv_mac_ ##page = {   \
 135         .cb_read = rtl_debug_get_mac_page,                      \
 136         .cb_data = addr,                                        \
 137 }
 138
 139 RTL_DEBUG_IMPL_MAC_SERIES(0, 0x0000);
 140 RTL_DEBUG_IMPL_MAC_SERIES(1, 0x0100);
 141 RTL_DEBUG_IMPL_MAC_SERIES(2, 0x0200);
 142 RTL_DEBUG_IMPL_MAC_SERIES(3, 0x0300);
 143 RTL_DEBUG_IMPL_MAC_SERIES(4, 0x0400);
 144 RTL_DEBUG_IMPL_MAC_SERIES(5, 0x0500);
 145 RTL_DEBUG_IMPL_MAC_SERIES(6, 0x0600);
 146 RTL_DEBUG_IMPL_MAC_SERIES(7, 0x0700);
 147 RTL_DEBUG_IMPL_MAC_SERIES(10, 0x1000);
 148 RTL_DEBUG_IMPL_MAC_SERIES(11, 0x1100);
 149 RTL_DEBUG_IMPL_MAC_SERIES(12, 0x1200);
 150 RTL_DEBUG_IMPL_MAC_SERIES(13, 0x1300);
 151 RTL_DEBUG_IMPL_MAC_SERIES(14, 0x1400);
 152 RTL_DEBUG_IMPL_MAC_SERIES(15, 0x1500);
 153 RTL_DEBUG_IMPL_MAC_SERIES(16, 0x1600);
 154 RTL_DEBUG_IMPL_MAC_SERIES(17, 0x1700);
 155
 156 static int rtl_debug_get_bb_page(struct seq_file *m, void *v)
 157 {
 158         struct rtl_debugfs_priv *debugfs_priv = m->private;
 159         struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
 160         struct ieee80211_hw *hw = rtlpriv->hw;
 161         u32 page = debugfs_priv->cb_data;
 162         int i, n;
 163         int max = 0xff;
 164
 165         for (n = 0; n <= max; ) {
 166                 seq_printf(m, "\n%8.8x  ", n + page);
 167                 for (i = 0; i < 4 && n <= max; i++, n += 4)
 168                         seq_printf(m, "%8.8x    ",
 169                                    rtl_get_bbreg(hw, (page | n), 0xffffffff));
 170         }
 171         seq_puts(m, "\n");
 172         return 0;
 173 }
 174
 175 #define RTL_DEBUG_IMPL_BB_SERIES(page, addr)                    \
 176 static struct rtl_debugfs_priv rtl_debug_priv_bb_ ##page = {    \
 177         .cb_read = rtl_debug_get_bb_page,                       \
 178         .cb_data = addr,                                        \
 179 }
 180
 181 RTL_DEBUG_IMPL_BB_SERIES(8, 0x0800);
 182 RTL_DEBUG_IMPL_BB_SERIES(9, 0x0900);
 183 RTL_DEBUG_IMPL_BB_SERIES(a, 0x0a00);
 184 RTL_DEBUG_IMPL_BB_SERIES(b, 0x0b00);
 185 RTL_DEBUG_IMPL_BB_SERIES(c, 0x0c00);
 186 RTL_DEBUG_IMPL_BB_SERIES(d, 0x0d00);
 187 RTL_DEBUG_IMPL_BB_SERIES(e, 0x0e00);
 188 RTL_DEBUG_IMPL_BB_SERIES(f, 0x0f00);
 189 RTL_DEBUG_IMPL_BB_SERIES(18, 0x1800);
 190 RTL_DEBUG_IMPL_BB_SERIES(19, 0x1900);
 191 RTL_DEBUG_IMPL_BB_SERIES(1a, 0x1a00);
 192 RTL_DEBUG_IMPL_BB_SERIES(1b, 0x1b00);
 193 RTL_DEBUG_IMPL_BB_SERIES(1c, 0x1c00);
 194 RTL_DEBUG_IMPL_BB_SERIES(1d, 0x1d00);
 195 RTL_DEBUG_IMPL_BB_SERIES(1e, 0x1e00);
 196 RTL_DEBUG_IMPL_BB_SERIES(1f, 0x1f00);
 197
 198 static int rtl_debug_get_reg_rf(struct seq_file *m, void *v)
 199 {
 200         struct rtl_debugfs_priv *debugfs_priv = m->private;
 201         struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
 202         struct ieee80211_hw *hw = rtlpriv->hw;
 203         enum radio_path rfpath = debugfs_priv->cb_data;
 204         int i, n;
 205         int max = 0x40;
 206
 207         if (IS_HARDWARE_TYPE_8822B(rtlpriv))
 208                 max = 0xff;
 209
 210         seq_printf(m, "\nPATH(%d)", rfpath);
 211
 212         for (n = 0; n <= max; ) {
 213                 seq_printf(m, "\n%8.8x  ", n);
 214                 for (i = 0; i < 4 && n <= max; n += 1, i++)
 215                         seq_printf(m, "%8.8x    ",
 216                                    rtl_get_rfreg(hw, rfpath, n, 0xffffffff));
 217         }
 218         seq_puts(m, "\n");
 219         return 0;
 220 }
 221
 222 #define RTL_DEBUG_IMPL_RF_SERIES(page, addr)                    \
 223 static struct rtl_debugfs_priv rtl_debug_priv_rf_ ##page = {    \
 224         .cb_read = rtl_debug_get_reg_rf,                        \
 225         .cb_data = addr,                                        \
 226 }
 227
 228 RTL_DEBUG_IMPL_RF_SERIES(a, RF90_PATH_A);
 229 RTL_DEBUG_IMPL_RF_SERIES(b, RF90_PATH_B);
 230
 231 static int rtl_debug_get_cam_register(struct seq_file *m, void *v)
 232 {
 233         struct rtl_debugfs_priv *debugfs_priv = m->private;
 234         struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
 235         int start = debugfs_priv->cb_data;
 236         u32 target_cmd = 0;
 237         u32 target_val = 0;
 238         u8 entry_i = 0;
 239         u32 ulstatus;
 240         int i = 100, j = 0;
 241         int end = (start + 11 > TOTAL_CAM_ENTRY ? TOTAL_CAM_ENTRY : start + 11);
 242
 243         /* This dump the current register page */
 244         seq_printf(m,
 245                    "\n#################### SECURITY CAM (%d-%d) ##################\n",
 246                    start, end - 1);
 247
 248         for (j = start; j < end; j++) {
 249                 seq_printf(m, "\nD:  %2x > ", j);
 250                 for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
 251                         /* polling bit, and No Write enable, and address  */
 252                         target_cmd = entry_i + CAM_CONTENT_COUNT * j;
 253                         target_cmd = target_cmd | BIT(31);
 254
 255                         /* Check polling bit is clear */
 256                         while ((i--) >= 0) {
 257                                 ulstatus =
 258                                     rtl_read_dword(rtlpriv,
 259                                                    rtlpriv->cfg->maps[RWCAM]);
 260                                 if (ulstatus & BIT(31))
 261                                         continue;
 262                                 else
 263                                         break;
 264                         }
 265
 266                         rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
 267                                         target_cmd);
 268                         target_val = rtl_read_dword(rtlpriv,
 269                                                     rtlpriv->cfg->maps[RCAMO]);
 270                         seq_printf(m, "%8.8x ", target_val);
 271                 }
 272         }
 273         seq_puts(m, "\n");
 274         return 0;
 275 }
 276
 277 #define RTL_DEBUG_IMPL_CAM_SERIES(page, addr)                   \
 278 static struct rtl_debugfs_priv rtl_debug_priv_cam_ ##page = {   \
 279         .cb_read = rtl_debug_get_cam_register,                  \
 280         .cb_data = addr,                                        \
 281 }
 282
 283 RTL_DEBUG_IMPL_CAM_SERIES(1, 0);
 284 RTL_DEBUG_IMPL_CAM_SERIES(2, 11);
 285 RTL_DEBUG_IMPL_CAM_SERIES(3, 22);
 286
 287 static int rtl_debug_get_btcoex(struct seq_file *m, void *v)
 288 {
 289         struct rtl_debugfs_priv *debugfs_priv = m->private;
 290         struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
 291
 292         if (rtlpriv->cfg->ops->get_btc_status())
 293                 rtlpriv->btcoexist.btc_ops->btc_display_bt_coex_info(rtlpriv,
 294                                                                      m);
 295
 296         seq_puts(m, "\n");
 297
 298         return 0;
 299 }
 300
 301 static struct rtl_debugfs_priv rtl_debug_priv_btcoex = {
 302         .cb_read = rtl_debug_get_btcoex,
 303         .cb_data = 0,
 304 };
 305
 306 static ssize_t rtl_debugfs_set_write_reg(struct file *filp,
 307                                          const char __user *buffer,
 308                                          size_t count, loff_t *loff)
 309 {
 310         struct rtl_debugfs_priv *debugfs_priv = filp->private_data;
 311         struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
 312         char tmp[32 + 1];
 313         int tmp_len;
 314         u32 addr, val, len;
 315         int num;
 316
 317         if (count < 3)
 318                 return -EFAULT;
 319
 320         tmp_len = (count > sizeof(tmp) - 1 ? sizeof(tmp) - 1 : count);
 321
 322         if (!buffer || copy_from_user(tmp, buffer, tmp_len))
 323                 return count;
 324
 325         tmp[tmp_len] = '\0';
 326
 327         /* write BB/MAC register */
 328         num = sscanf(tmp, "%x %x %x", &addr, &val, &len);
 329
 330         if (num !=  3)
 331                 return count;
 332
 333         switch (len) {
 334         case 1:
 335                 rtl_write_byte(rtlpriv, addr, (u8)val);
 336                 break;
 337         case 2:
 338                 rtl_write_word(rtlpriv, addr, (u16)val);
 339                 break;
 340         case 4:
 341                 rtl_write_dword(rtlpriv, addr, val);
 342                 break;
 343         default:
 344                 /*printk("error write length=%d", len);*/
 345                 break;
 346         }
 347
 348         return count;
 349 }
 350
 351 static struct rtl_debugfs_priv rtl_debug_priv_write_reg = {
 352         .cb_write = rtl_debugfs_set_write_reg,
 353 };
 354
 355 static ssize_t rtl_debugfs_set_write_h2c(struct file *filp,
 356                                          const char __user *buffer,
 357                                          size_t count, loff_t *loff)
 358 {
 359         struct rtl_debugfs_priv *debugfs_priv = filp->private_data;
 360         struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
 361         struct ieee80211_hw *hw = rtlpriv->hw;
 362         char tmp[32 + 1];
 363         int tmp_len;
 364         u8 h2c_len, h2c_data_packed[8];
 365         int h2c_data[8];        /* idx 0: cmd */
 366         int i;
 367
 368         if (count < 3)
 369                 return -EFAULT;
 370
 371         tmp_len = (count > sizeof(tmp) - 1 ? sizeof(tmp) - 1 : count);
 372
 373         if (!buffer || copy_from_user(tmp, buffer, tmp_len))
 374                 return count;
 375
 376         tmp[tmp_len] = '\0';
 377
 378         h2c_len = sscanf(tmp, "%X %X %X %X %X %X %X %X",
 379                          &h2c_data[0], &h2c_data[1],
 380                          &h2c_data[2], &h2c_data[3],
 381                          &h2c_data[4], &h2c_data[5],
 382                          &h2c_data[6], &h2c_data[7]);
 383
 384         if (h2c_len <= 0)
 385                 return count;
 386
 387         for (i = 0; i < h2c_len; i++)
 388                 h2c_data_packed[i] = (u8)h2c_data[i];
 389
 390         rtlpriv->cfg->ops->fill_h2c_cmd(hw, h2c_data_packed[0],
 391                                         h2c_len - 1,
 392                                         &h2c_data_packed[1]);
 393
 394         return count;
 395 }
 396
 397 static struct rtl_debugfs_priv rtl_debug_priv_write_h2c = {
 398         .cb_write = rtl_debugfs_set_write_h2c,
 399 };
 400
 401 static ssize_t rtl_debugfs_set_write_rfreg(struct file *filp,
 402                                            const char __user *buffer,
 403                                             size_t count, loff_t *loff)
 404 {
 405         struct rtl_debugfs_priv *debugfs_priv = filp->private_data;
 406         struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
 407         struct ieee80211_hw *hw = rtlpriv->hw;
 408         char tmp[32 + 1];
 409         int tmp_len;
 410         int num;
 411         int path;
 412         u32 addr, bitmask, data;
 413
 414         if (count < 3)
 415                 return -EFAULT;
 416
 417         tmp_len = (count > sizeof(tmp) - 1 ? sizeof(tmp) - 1 : count);
 418
 419         if (!buffer || copy_from_user(tmp, buffer, tmp_len))
 420                 return count;
 421
 422         tmp[tmp_len] = '\0';
 423
 424         num = sscanf(tmp, "%X %X %X %X",
 425                      &path, &addr, &bitmask, &data);
 426
 427         if (num != 4) {
 428                 RT_TRACE(rtlpriv, COMP_ERR, DBG_DMESG,
 429                          "Format is <path> <addr> <mask> <data>\n");
 430                 return count;
 431         }
 432
 433         rtl_set_rfreg(hw, path, addr, bitmask, data);
 434
 435         return count;
 436 }
 437
 438 static struct rtl_debugfs_priv rtl_debug_priv_write_rfreg = {
 439         .cb_write = rtl_debugfs_set_write_rfreg,
 440 };
 441
 442 static int rtl_debugfs_close(struct inode *inode, struct file *filp)
 443 {
 444         return 0;
 445 }
 446
 447 static ssize_t rtl_debugfs_common_write(struct file *filp,
 448                                         const char __user *buffer,
 449                                         size_t count, loff_t *loff)
 450 {
 451         struct rtl_debugfs_priv *debugfs_priv = filp->private_data;
 452
 453         return debugfs_priv->cb_write(filp, buffer, count, loff);
 454 }
 455
 456 static const struct file_operations file_ops_common_write = {
 457         .owner = THIS_MODULE,
 458         .write = rtl_debugfs_common_write,
 459         .open = simple_open,
 460         .release = rtl_debugfs_close,
 461 };
 462
 463 #define RTL_DEBUGFS_ADD_CORE(name, mode, fopname)                          \
 464         do {                                                               \
 465                 rtl_debug_priv_ ##name.rtlpriv = rtlpriv;                  \
 466                 if (!debugfs_create_file(#name, mode,                      \
 467                                          parent, &rtl_debug_priv_ ##name,  \
 468                                          &file_ops_ ##fopname))            \
 469                         pr_err("Unable to initialize debugfs:%s/%s\n",     \
 470                                rtlpriv->dbg.debugfs_name,                  \
 471                                #name);                                     \
 472         } while (0)
 473
 474 #define RTL_DEBUGFS_ADD(name)                                              \
 475                 RTL_DEBUGFS_ADD_CORE(name, S_IFREG | 0444, common)
 476 #define RTL_DEBUGFS_ADD_W(name)                                            \
 477                 RTL_DEBUGFS_ADD_CORE(name, S_IFREG | 0222, common_write)
 478
 479 void rtl_debug_add_one(struct ieee80211_hw *hw)
 480 {
 481         struct rtl_priv *rtlpriv = rtl_priv(hw);
 482         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
 483         struct dentry *parent;
 484
 485         snprintf(rtlpriv->dbg.debugfs_name, 18, "%pMF", rtlefuse->dev_addr);
 486
 487         rtlpriv->dbg.debugfs_dir =
 488                 debugfs_create_dir(rtlpriv->dbg.debugfs_name, debugfs_topdir);
 489         if (!rtlpriv->dbg.debugfs_dir) {
 490                 pr_err("Unable to init debugfs:/%s/%s\n", rtlpriv->cfg->name,
 491                        rtlpriv->dbg.debugfs_name);
 492                 return;
 493         }
 494
 495         parent = rtlpriv->dbg.debugfs_dir;
 496
 497         RTL_DEBUGFS_ADD(mac_0);
 498         RTL_DEBUGFS_ADD(mac_1);
 499         RTL_DEBUGFS_ADD(mac_2);
 500         RTL_DEBUGFS_ADD(mac_3);
 501         RTL_DEBUGFS_ADD(mac_4);
 502         RTL_DEBUGFS_ADD(mac_5);
 503         RTL_DEBUGFS_ADD(mac_6);
 504         RTL_DEBUGFS_ADD(mac_7);
 505         RTL_DEBUGFS_ADD(bb_8);
 506         RTL_DEBUGFS_ADD(bb_9);
 507         RTL_DEBUGFS_ADD(bb_a);
 508         RTL_DEBUGFS_ADD(bb_b);
 509         RTL_DEBUGFS_ADD(bb_c);
 510         RTL_DEBUGFS_ADD(bb_d);
 511         RTL_DEBUGFS_ADD(bb_e);
 512         RTL_DEBUGFS_ADD(bb_f);
 513         RTL_DEBUGFS_ADD(mac_10);
 514         RTL_DEBUGFS_ADD(mac_11);
 515         RTL_DEBUGFS_ADD(mac_12);
 516         RTL_DEBUGFS_ADD(mac_13);
 517         RTL_DEBUGFS_ADD(mac_14);
 518         RTL_DEBUGFS_ADD(mac_15);
 519         RTL_DEBUGFS_ADD(mac_16);
 520         RTL_DEBUGFS_ADD(mac_17);
 521         RTL_DEBUGFS_ADD(bb_18);
 522         RTL_DEBUGFS_ADD(bb_19);
 523         RTL_DEBUGFS_ADD(bb_1a);
 524         RTL_DEBUGFS_ADD(bb_1b);
 525         RTL_DEBUGFS_ADD(bb_1c);
 526         RTL_DEBUGFS_ADD(bb_1d);
 527         RTL_DEBUGFS_ADD(bb_1e);
 528         RTL_DEBUGFS_ADD(bb_1f);
 529         RTL_DEBUGFS_ADD(rf_a);
 530         RTL_DEBUGFS_ADD(rf_b);
 531
 532         RTL_DEBUGFS_ADD(cam_1);
 533         RTL_DEBUGFS_ADD(cam_2);
 534         RTL_DEBUGFS_ADD(cam_3);
 535
 536         RTL_DEBUGFS_ADD(btcoex);
 537
 538         RTL_DEBUGFS_ADD_W(write_reg);
 539         RTL_DEBUGFS_ADD_W(write_h2c);
 540         RTL_DEBUGFS_ADD_W(write_rfreg);
 541 }
 542 EXPORT_SYMBOL_GPL(rtl_debug_add_one);
 543
 544 void rtl_debug_remove_one(struct ieee80211_hw *hw)
 545 {
 546         struct rtl_priv *rtlpriv = rtl_priv(hw);
 547
 548         debugfs_remove_recursive(rtlpriv->dbg.debugfs_dir);
 549         rtlpriv->dbg.debugfs_dir = NULL;
 550 }
 551 EXPORT_SYMBOL_GPL(rtl_debug_remove_one);
 552
 553 void rtl_debugfs_add_topdir(void)
 554 {
 555         debugfs_topdir = debugfs_create_dir("rtlwifi", NULL);
 556 }
 557
 558 void rtl_debugfs_remove_topdir(void)
 559 {
 560         debugfs_remove_recursive(debugfs_topdir);
 561 }
 562
 563 #endif