package/b43/src/debugfs.c

   1 /*
   2
   3   Broadcom B43 wireless driver
   4
   5   debugfs driver debugging code
   6
   7   Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>
   8
   9   This program is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU General Public License as published by
  11   the Free Software Foundation; either version 2 of the License, or
  12   (at your option) any later version.
  13
  14   This program is distributed in the hope that it will be useful,
  15   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17   GNU General Public License for more details.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with this program; see the file COPYING.  If not, write to
  21   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  22   Boston, MA 02110-1301, USA.
  23
  24 */
  25
  26 #include <linux/fs.h>
  27 #include <linux/debugfs.h>
  28 #include <linux/slab.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/pci.h>
  31 #include <linux/mutex.h>
  32
  33 #include "b43.h"
  34 #include "main.h"
  35 #include "debugfs.h"
  36 #include "dma.h"
  37 #include "pio.h"
  38 #include "xmit.h"
  39
  40
  41 /* The root directory. */
  42 struct dentry *rootdir;
  43
  44 struct b43_debugfs_fops {
  45         ssize_t (*read)(struct b43_wldev *dev, char *buf, size_t bufsize);
  46         int (*write)(struct b43_wldev *dev, const char *buf, size_t count);
  47         struct file_operations fops;
  48         /* Offset of struct b43_dfs_file in struct b43_dfsentry */
  49         size_t file_struct_offset;
  50         /* Take wl->irq_lock before calling read/write? */
  51         bool take_irqlock;
  52 };
  53
  54 static inline
  55 struct b43_dfs_file * fops_to_dfs_file(struct b43_wldev *dev,
  56                                        const struct b43_debugfs_fops *dfops)
  57 {
  58         void *p;
  59
  60         p = dev->dfsentry;
  61         p += dfops->file_struct_offset;
  62
  63         return p;
  64 }
  65
  66
  67 #define fappend(fmt, x...)      \
  68         do {                                                    \
  69                 if (bufsize - count)                            \
  70                         count += snprintf(buf + count,          \
  71                                           bufsize - count,      \
  72                                           fmt , ##x);           \
  73                 else                                            \
  74                         printk(KERN_ERR "b43: fappend overflow\n"); \
  75         } while (0)
  76
  77
  78 /* wl->irq_lock is locked */
  79 ssize_t tsf_read_file(struct b43_wldev *dev, char *buf, size_t bufsize)
  80 {
  81         ssize_t count = 0;
  82         u64 tsf;
  83
  84         b43_tsf_read(dev, &tsf);
  85         fappend("0x%08x%08x\n",
  86                 (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
  87                 (unsigned int)(tsf & 0xFFFFFFFFULL));
  88
  89         return count;
  90 }
  91
  92 /* wl->irq_lock is locked */
  93 int tsf_write_file(struct b43_wldev *dev, const char *buf, size_t count)
  94 {
  95         u64 tsf;
  96
  97         if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
  98                 return -EINVAL;
  99         b43_tsf_write(dev, tsf);
 100
 101         return 0;
 102 }
 103
 104 /* wl->irq_lock is locked */
 105 ssize_t ucode_regs_read_file(struct b43_wldev *dev, char *buf, size_t bufsize)
 106 {
 107         ssize_t count = 0;
 108         int i;
 109
 110         for (i = 0; i < 64; i++) {
 111                 fappend("r%d = 0x%04x\n", i,
 112                         b43_shm_read16(dev, B43_SHM_SCRATCH, i));
 113         }
 114
 115         return count;
 116 }
 117
 118 /* wl->irq_lock is locked */
 119 ssize_t shm_read_file(struct b43_wldev *dev, char *buf, size_t bufsize)
 120 {
 121         ssize_t count = 0;
 122         int i;
 123         u16 tmp;
 124         __le16 *le16buf = (__le16 *)buf;
 125
 126         for (i = 0; i < 0x1000; i++) {
 127                 if (bufsize <= 0)
 128                         break;
 129                 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
 130                 le16buf[i] = cpu_to_le16(tmp);
 131                 count += sizeof(tmp);
 132                 bufsize -= sizeof(tmp);
 133         }
 134
 135         return count;
 136 }
 137
 138 ssize_t txstat_read_file(struct b43_wldev *dev, char *buf, size_t bufsize)
 139 {
 140         struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
 141         ssize_t count = 0;
 142         unsigned long flags;
 143         int i, idx;
 144         struct b43_txstatus *stat;
 145
 146         spin_lock_irqsave(&log->lock, flags);
 147         if (log->end < 0) {
 148                 fappend("Nothing transmitted, yet\n");
 149                 goto out_unlock;
 150         }
 151         fappend("b43 TX status reports:\n\n"
 152                 "index | cookie | seq | phy_stat | frame_count | "
 153                 "rts_count | supp_reason | pm_indicated | "
 154                 "intermediate | for_ampdu | acked\n" "---\n");
 155         i = log->end + 1;
 156         idx = 0;
 157         while (1) {
 158                 if (i == B43_NR_LOGGED_TXSTATUS)
 159                         i = 0;
 160                 stat = &(log->log[i]);
 161                 if (stat->cookie) {
 162                         fappend("%03d | "
 163                                 "0x%04X | 0x%04X | 0x%02X | "
 164                                 "0x%X | 0x%X | "
 165                                 "%u | %u | "
 166                                 "%u | %u | %u\n",
 167                                 idx,
 168                                 stat->cookie, stat->seq, stat->phy_stat,
 169                                 stat->frame_count, stat->rts_count,
 170                                 stat->supp_reason, stat->pm_indicated,
 171                                 stat->intermediate, stat->for_ampdu,
 172                                 stat->acked);
 173                         idx++;
 174                 }
 175                 if (i == log->end)
 176                         break;
 177                 i++;
 178         }
 179 out_unlock:
 180         spin_unlock_irqrestore(&log->lock, flags);
 181
 182         return count;
 183 }
 184
 185 ssize_t txpower_g_read_file(struct b43_wldev *dev, char *buf, size_t bufsize)
 186 {
 187         ssize_t count = 0;
 188
 189         if (dev->phy.type != B43_PHYTYPE_G) {
 190                 fappend("Device is not a G-PHY\n");
 191                 goto out;
 192         }
 193         fappend("Control:               %s\n", dev->phy.manual_txpower_control ?
 194                 "MANUAL" : "AUTOMATIC");
 195         fappend("Baseband attenuation:  %u\n", dev->phy.bbatt.att);
 196         fappend("Radio attenuation:     %u\n", dev->phy.rfatt.att);
 197         fappend("TX Mixer Gain:         %s\n",
 198                 (dev->phy.tx_control & B43_TXCTL_TXMIX) ? "ON" : "OFF");
 199         fappend("PA Gain 2dB:           %s\n",
 200                 (dev->phy.tx_control & B43_TXCTL_PA2DB) ? "ON" : "OFF");
 201         fappend("PA Gain 3dB:           %s\n",
 202                 (dev->phy.tx_control & B43_TXCTL_PA3DB) ? "ON" : "OFF");
 203         fappend("\n\n");
 204         fappend("You can write to this file:\n");
 205         fappend("Writing \"auto\" enables automatic txpower control.\n");
 206         fappend
 207             ("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
 208              "enables manual txpower control.\n");
 209         fappend("Example: 5 4 0 0 1\n");
 210         fappend("Enables manual control with Baseband attenuation 5, "
 211                 "Radio attenuation 4, No TX Mixer Gain, "
 212                 "No PA Gain 2dB, With PA Gain 3dB.\n");
 213 out:
 214         return count;
 215 }
 216
 217 int txpower_g_write_file(struct b43_wldev *dev, const char *buf, size_t count)
 218 {
 219         unsigned long phy_flags;
 220
 221         if (dev->phy.type != B43_PHYTYPE_G)
 222                 return -ENODEV;
 223         if ((count >= 4) && (memcmp(buf, "auto", 4) == 0)) {
 224                 /* Automatic control */
 225                 dev->phy.manual_txpower_control = 0;
 226                 b43_phy_xmitpower(dev);
 227         } else {
 228                 int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
 229                 /* Manual control */
 230                 if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
 231                            &txmix, &pa2db, &pa3db) != 5)
 232                         return -EINVAL;
 233                 b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
 234                 dev->phy.manual_txpower_control = 1;
 235                 dev->phy.bbatt.att = bbatt;
 236                 dev->phy.rfatt.att = rfatt;
 237                 dev->phy.tx_control = 0;
 238                 if (txmix)
 239                         dev->phy.tx_control |= B43_TXCTL_TXMIX;
 240                 if (pa2db)
 241                         dev->phy.tx_control |= B43_TXCTL_PA2DB;
 242                 if (pa3db)
 243                         dev->phy.tx_control |= B43_TXCTL_PA3DB;
 244                 b43_phy_lock(dev, phy_flags);
 245                 b43_radio_lock(dev);
 246                 b43_set_txpower_g(dev, &dev->phy.bbatt,
 247                                   &dev->phy.rfatt, dev->phy.tx_control);
 248                 b43_radio_unlock(dev);
 249                 b43_phy_unlock(dev, phy_flags);
 250         }
 251
 252         return 0;
 253 }
 254
 255 /* wl->irq_lock is locked */
 256 int restart_write_file(struct b43_wldev *dev, const char *buf, size_t count)
 257 {
 258         int err = 0;
 259
 260         if (count > 0 && buf[0] == '1') {
 261                 b43_controller_restart(dev, "manually restarted");
 262         } else
 263                 err = -EINVAL;
 264
 265         return err;
 266 }
 267
 268 static ssize_t append_lo_table(ssize_t count, char *buf, const size_t bufsize,
 269                                struct b43_loctl table[B43_NR_BB][B43_NR_RF])
 270 {
 271         unsigned int i, j;
 272         struct b43_loctl *ctl;
 273
 274         for (i = 0; i < B43_NR_BB; i++) {
 275                 for (j = 0; j < B43_NR_RF; j++) {
 276                         ctl = &(table[i][j]);
 277                         fappend("(bbatt %2u, rfatt %2u)  ->  "
 278                                 "(I %+3d, Q %+3d, Used: %d, Calibrated: %d)\n",
 279                                 i, j, ctl->i, ctl->q,
 280                                 ctl->used,
 281                                 b43_loctl_is_calibrated(ctl));
 282                 }
 283         }
 284
 285         return count;
 286 }
 287
 288 ssize_t loctls_read_file(struct b43_wldev *dev, char *buf, size_t bufsize)
 289 {
 290         ssize_t count = 0;
 291         struct b43_txpower_lo_control *lo;
 292         int i, err = 0;
 293
 294         if (dev->phy.type != B43_PHYTYPE_G) {
 295                 fappend("Device is not a G-PHY\n");
 296                 err = -ENODEV;
 297                 goto out;
 298         }
 299         lo = dev->phy.lo_control;
 300         fappend("-- Local Oscillator calibration data --\n\n");
 301         fappend("Measured: %d,  Rebuild: %d,  HW-power-control: %d\n",
 302                 lo->lo_measured,
 303                 lo->rebuild,
 304                 dev->phy.hardware_power_control);
 305         fappend("TX Bias: 0x%02X,  TX Magn: 0x%02X\n",
 306                 lo->tx_bias, lo->tx_magn);
 307         fappend("Power Vector: 0x%08X%08X\n",
 308                 (unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
 309                 (unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL));
 310         fappend("\nControl table WITH PADMIX:\n");
 311         count = append_lo_table(count, buf, bufsize, lo->with_padmix);
 312         fappend("\nControl table WITHOUT PADMIX:\n");
 313         count = append_lo_table(count, buf, bufsize, lo->no_padmix);
 314         fappend("\nUsed RF attenuation values:  Value(WithPadmix flag)\n");
 315         for (i = 0; i < lo->rfatt_list.len; i++) {
 316                 fappend("%u(%d), ",
 317                         lo->rfatt_list.list[i].att,
 318                         lo->rfatt_list.list[i].with_padmix);
 319         }
 320         fappend("\n");
 321         fappend("\nUsed Baseband attenuation values:\n");
 322         for (i = 0; i < lo->bbatt_list.len; i++) {
 323                 fappend("%u, ",
 324                         lo->bbatt_list.list[i].att);
 325         }
 326         fappend("\n");
 327
 328 out:
 329         return err ? err : count;
 330 }
 331
 332 #undef fappend
 333
 334 static int b43_debugfs_open(struct inode *inode, struct file *file)
 335 {
 336         file->private_data = inode->i_private;
 337         return 0;
 338 }
 339
 340 static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
 341                                 size_t count, loff_t *ppos)
 342 {
 343         struct b43_wldev *dev;
 344         struct b43_debugfs_fops *dfops;
 345         struct b43_dfs_file *dfile;
 346         ssize_t ret;
 347         char *buf;
 348         const size_t bufsize = 1024 * 128;
 349         const size_t buforder = get_order(bufsize);
 350         int err = 0;
 351
 352         if (!count)
 353                 return 0;
 354         dev = file->private_data;
 355         if (!dev)
 356                 return -ENODEV;
 357
 358         mutex_lock(&dev->wl->mutex);
 359         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 360                 err = -ENODEV;
 361                 goto out_unlock;
 362         }
 363
 364         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 365         if (!dfops->read) {
 366                 err = -ENOSYS;
 367                 goto out_unlock;
 368         }
 369         dfile = fops_to_dfs_file(dev, dfops);
 370
 371         if (!dfile->buffer) {
 372                 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
 373                 if (!buf) {
 374                         err = -ENOMEM;
 375                         goto out_unlock;
 376                 }
 377                 memset(buf, 0, bufsize);
 378                 if (dfops->take_irqlock) {
 379                         spin_lock_irq(&dev->wl->irq_lock);
 380                         ret = dfops->read(dev, buf, bufsize);
 381                         spin_unlock_irq(&dev->wl->irq_lock);
 382                 } else
 383                         ret = dfops->read(dev, buf, bufsize);
 384                 if (ret <= 0) {
 385                         free_pages((unsigned long)buf, buforder);
 386                         err = ret;
 387                         goto out_unlock;
 388                 }
 389                 dfile->data_len = ret;
 390                 dfile->buffer = buf;
 391         }
 392
 393         ret = simple_read_from_buffer(userbuf, count, ppos,
 394                                       dfile->buffer,
 395                                       dfile->data_len);
 396         if (*ppos >= dfile->data_len) {
 397                 free_pages((unsigned long)dfile->buffer, buforder);
 398                 dfile->buffer = NULL;
 399                 dfile->data_len = 0;
 400         }
 401 out_unlock:
 402         mutex_unlock(&dev->wl->mutex);
 403
 404         return err ? err : ret;
 405 }
 406
 407 static ssize_t b43_debugfs_write(struct file *file,
 408                                  const char __user *userbuf,
 409                                  size_t count, loff_t *ppos)
 410 {
 411         struct b43_wldev *dev;
 412         struct b43_debugfs_fops *dfops;
 413         char *buf;
 414         int err = 0;
 415
 416         if (!count)
 417                 return 0;
 418         if (count > PAGE_SIZE)
 419                 return -E2BIG;
 420         dev = file->private_data;
 421         if (!dev)
 422                 return -ENODEV;
 423
 424         mutex_lock(&dev->wl->mutex);
 425         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 426                 err = -ENODEV;
 427                 goto out_unlock;
 428         }
 429
 430         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 431         if (!dfops->write) {
 432                 err = -ENOSYS;
 433                 goto out_unlock;
 434         }
 435
 436         buf = (char *)get_zeroed_page(GFP_KERNEL);
 437         if (!buf) {
 438                 err = -ENOMEM;
 439                 goto out_unlock;
 440         }
 441         if (copy_from_user(buf, userbuf, count)) {
 442                 err = -EFAULT;
 443                 goto out_freepage;
 444         }
 445         if (dfops->take_irqlock) {
 446                 spin_lock_irq(&dev->wl->irq_lock);
 447                 err = dfops->write(dev, buf, count);
 448                 spin_unlock_irq(&dev->wl->irq_lock);
 449         } else
 450                 err = dfops->write(dev, buf, count);
 451         if (err)
 452                 goto out_freepage;
 453
 454 out_freepage:
 455         free_page((unsigned long)buf);
 456 out_unlock:
 457         mutex_unlock(&dev->wl->mutex);
 458
 459         return err ? err : count;
 460 }
 461
 462
 463 #define B43_DEBUGFS_FOPS(name, _read, _write, _take_irqlock)    \
 464         static struct b43_debugfs_fops fops_##name = {          \
 465                 .read   = _read,                                \
 466                 .write  = _write,                               \
 467                 .fops   = {                                     \
 468                         .open   = b43_debugfs_open,             \
 469                         .read   = b43_debugfs_read,             \
 470                         .write  = b43_debugfs_write,            \
 471                 },                                              \
 472                 .file_struct_offset = offsetof(struct b43_dfsentry, \
 473                                                file_##name),    \
 474                 .take_irqlock   = _take_irqlock,                \
 475         }
 476
 477 B43_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
 478 B43_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
 479 B43_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
 480 B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
 481 B43_DEBUGFS_FOPS(txpower_g, txpower_g_read_file, txpower_g_write_file, 0);
 482 B43_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
 483 B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL, 0);
 484
 485
 486 int b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
 487 {
 488         return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
 489 }
 490
 491 static void b43_remove_dynamic_debug(struct b43_wldev *dev)
 492 {
 493         struct b43_dfsentry *e = dev->dfsentry;
 494         int i;
 495
 496         for (i = 0; i < __B43_NR_DYNDBG; i++)
 497                 debugfs_remove(e->dyn_debug_dentries[i]);
 498 }
 499
 500 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 501 {
 502         struct b43_dfsentry *e = dev->dfsentry;
 503         struct dentry *d;
 504
 505 #define add_dyn_dbg(name, id, initstate) do {           \
 506         e->dyn_debug[id] = (initstate);                 \
 507         d = debugfs_create_bool(name, 0600, e->subdir,  \
 508                                 &(e->dyn_debug[id]));   \
 509         if (!IS_ERR(d))                                 \
 510                 e->dyn_debug_dentries[id] = d;          \
 511                                 } while (0)
 512
 513         add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
 514         add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
 515         add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
 516         add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
 517         add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
 518
 519 #undef add_dyn_dbg
 520 }
 521
 522 void b43_debugfs_add_device(struct b43_wldev *dev)
 523 {
 524         struct b43_dfsentry *e;
 525         struct b43_txstatus_log *log;
 526         char devdir[16];
 527
 528         B43_WARN_ON(!dev);
 529         e = kzalloc(sizeof(*e), GFP_KERNEL);
 530         if (!e) {
 531                 b43err(dev->wl, "debugfs: add device OOM\n");
 532                 return;
 533         }
 534         e->dev = dev;
 535         log = &e->txstatlog;
 536         log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
 537                            sizeof(struct b43_txstatus), GFP_KERNEL);
 538         if (!log->log) {
 539                 b43err(dev->wl, "debugfs: add device txstatus OOM\n");
 540                 kfree(e);
 541                 return;
 542         }
 543         log->end = -1;
 544         spin_lock_init(&log->lock);
 545
 546         dev->dfsentry = e;
 547
 548         snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 549         e->subdir = debugfs_create_dir(devdir, rootdir);
 550         if (!e->subdir || IS_ERR(e->subdir)) {
 551                 if (e->subdir == ERR_PTR(-ENODEV)) {
 552                         b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
 553                                "enabled in kernel config\n");
 554                 } else {
 555                         b43err(dev->wl, "debugfs: cannot create %s directory\n",
 556                                devdir);
 557                 }
 558                 dev->dfsentry = NULL;
 559                 kfree(log->log);
 560                 kfree(e);
 561                 return;
 562         }
 563
 564 #define ADD_FILE(name, mode)    \
 565         do {                                                    \
 566                 struct dentry *d;                               \
 567                 d = debugfs_create_file(__stringify(name),      \
 568                                         mode, e->subdir, dev,   \
 569                                         &fops_##name.fops);     \
 570                 e->file_##name.dentry = NULL;                   \
 571                 if (!IS_ERR(d))                                 \
 572                         e->file_##name.dentry = d;              \
 573         } while (0)
 574
 575
 576         ADD_FILE(tsf, 0600);
 577         ADD_FILE(ucode_regs, 0400);
 578         ADD_FILE(shm, 0400);
 579         ADD_FILE(txstat, 0400);
 580         ADD_FILE(txpower_g, 0600);
 581         ADD_FILE(restart, 0200);
 582         ADD_FILE(loctls, 0400);
 583
 584 #undef ADD_FILE
 585
 586         b43_add_dynamic_debug(dev);
 587 }
 588
 589 void b43_debugfs_remove_device(struct b43_wldev *dev)
 590 {
 591         struct b43_dfsentry *e;
 592
 593         if (!dev)
 594                 return;
 595         e = dev->dfsentry;
 596         if (!e)
 597                 return;
 598         b43_remove_dynamic_debug(dev);
 599
 600         debugfs_remove(e->file_tsf.dentry);
 601         debugfs_remove(e->file_ucode_regs.dentry);
 602         debugfs_remove(e->file_shm.dentry);
 603         debugfs_remove(e->file_txstat.dentry);
 604         debugfs_remove(e->file_txpower_g.dentry);
 605         debugfs_remove(e->file_restart.dentry);
 606         debugfs_remove(e->file_loctls.dentry);
 607
 608         debugfs_remove(e->subdir);
 609         kfree(e->txstatlog.log);
 610         kfree(e);
 611 }
 612
 613 void b43_debugfs_log_txstat(struct b43_wldev *dev,
 614                             const struct b43_txstatus *status)
 615 {
 616         struct b43_dfsentry *e = dev->dfsentry;
 617         struct b43_txstatus_log *log;
 618         struct b43_txstatus *cur;
 619         int i;
 620
 621         if (!e)
 622                 return;
 623         log = &e->txstatlog;
 624         B43_WARN_ON(!irqs_disabled());
 625         spin_lock(&log->lock);
 626         i = log->end + 1;
 627         if (i == B43_NR_LOGGED_TXSTATUS)
 628                 i = 0;
 629         log->end = i;
 630         cur = &(log->log[i]);
 631         memcpy(cur, status, sizeof(*cur));
 632         spin_unlock(&log->lock);
 633 }
 634
 635 void b43_debugfs_init(void)
 636 {
 637         rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 638         if (IS_ERR(rootdir))
 639                 rootdir = NULL;
 640 }
 641
 642 void b43_debugfs_exit(void)
 643 {
 644         debugfs_remove(rootdir);
 645 }