drivers/net/wireless/b43/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 "xmit.h"
  38
  39
  40 /* The root directory. */
  41 static struct dentry *rootdir;
  42
  43 struct b43_debugfs_fops {
  44         ssize_t (*read)(struct b43_wldev *dev, char *buf, size_t bufsize);
  45         int (*write)(struct b43_wldev *dev, const char *buf, size_t count);
  46         struct file_operations fops;
  47         /* Offset of struct b43_dfs_file in struct b43_dfsentry */
  48         size_t file_struct_offset;
  49         /* Take wl->irq_lock before calling read/write? */
  50         bool take_irqlock;
  51 };
  52
  53 static inline
  54 struct b43_dfs_file * fops_to_dfs_file(struct b43_wldev *dev,
  55                                        const struct b43_debugfs_fops *dfops)
  56 {
  57         void *p;
  58
  59         p = dev->dfsentry;
  60         p += dfops->file_struct_offset;
  61
  62         return p;
  63 }
  64
  65
  66 #define fappend(fmt, x...)      \
  67         do {                                                    \
  68                 if (bufsize - count)                            \
  69                         count += snprintf(buf + count,          \
  70                                           bufsize - count,      \
  71                                           fmt , ##x);           \
  72                 else                                            \
  73                         printk(KERN_ERR "b43: fappend overflow\n"); \
  74         } while (0)
  75
  76
  77 /* The biggest MMIO address that we allow access to from the debugfs files. */
  78 #define B43_MAX_MMIO_ACCESS     (0xF00 - 1)
  79
  80 static ssize_t mmio16read__read_file(struct b43_wldev *dev,
  81                                      char *buf, size_t bufsize)
  82 {
  83         ssize_t count = 0;
  84         unsigned int addr;
  85         u16 val;
  86
  87         addr = dev->dfsentry->mmio16read_next;
  88         if (addr > B43_MAX_MMIO_ACCESS)
  89                 return -EDESTADDRREQ;
  90
  91         val = b43_read16(dev, addr);
  92         fappend("0x%04X\n", val);
  93
  94         return count;
  95 }
  96
  97 static int mmio16read__write_file(struct b43_wldev *dev,
  98                                   const char *buf, size_t count)
  99 {
 100         unsigned int addr;
 101         int res;
 102
 103         res = sscanf(buf, "0x%X", &addr);
 104         if (res != 1)
 105                 return -EINVAL;
 106         if (addr > B43_MAX_MMIO_ACCESS)
 107                 return -EADDRNOTAVAIL;
 108
 109         dev->dfsentry->mmio16read_next = addr;
 110
 111         return 0;
 112 }
 113
 114 static int mmio16write__write_file(struct b43_wldev *dev,
 115                                    const char *buf, size_t count)
 116 {
 117         unsigned int addr, val;
 118         int res;
 119
 120         res = sscanf(buf, "0x%X = 0x%X", &addr, &val);
 121         if (res != 2)
 122                 return -EINVAL;
 123         if (addr > B43_MAX_MMIO_ACCESS)
 124                 return -EADDRNOTAVAIL;
 125         if (val > 0xFFFF)
 126                 return -E2BIG;
 127
 128         b43_write16(dev, addr, val);
 129
 130         return 0;
 131 }
 132
 133 static ssize_t mmio32read__read_file(struct b43_wldev *dev,
 134                                      char *buf, size_t bufsize)
 135 {
 136         ssize_t count = 0;
 137         unsigned int addr;
 138         u32 val;
 139
 140         addr = dev->dfsentry->mmio32read_next;
 141         if (addr > B43_MAX_MMIO_ACCESS)
 142                 return -EDESTADDRREQ;
 143
 144         val = b43_read32(dev, addr);
 145         fappend("0x%08X\n", val);
 146
 147         return count;
 148 }
 149
 150 static int mmio32read__write_file(struct b43_wldev *dev,
 151                                   const char *buf, size_t count)
 152 {
 153         unsigned int addr;
 154         int res;
 155
 156         res = sscanf(buf, "0x%X", &addr);
 157         if (res != 1)
 158                 return -EINVAL;
 159         if (addr > B43_MAX_MMIO_ACCESS)
 160                 return -EADDRNOTAVAIL;
 161
 162         dev->dfsentry->mmio32read_next = addr;
 163
 164         return 0;
 165 }
 166
 167 static int mmio32write__write_file(struct b43_wldev *dev,
 168                                    const char *buf, size_t count)
 169 {
 170         unsigned int addr, val;
 171         int res;
 172
 173         res = sscanf(buf, "0x%X = 0x%X", &addr, &val);
 174         if (res != 2)
 175                 return -EINVAL;
 176         if (addr > B43_MAX_MMIO_ACCESS)
 177                 return -EADDRNOTAVAIL;
 178         if (val > 0xFFFFFFFF)
 179                 return -E2BIG;
 180
 181         b43_write32(dev, addr, val);
 182
 183         return 0;
 184 }
 185
 186 /* wl->irq_lock is locked */
 187 static ssize_t tsf_read_file(struct b43_wldev *dev,
 188                              char *buf, size_t bufsize)
 189 {
 190         ssize_t count = 0;
 191         u64 tsf;
 192
 193         b43_tsf_read(dev, &tsf);
 194         fappend("0x%08x%08x\n",
 195                 (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
 196                 (unsigned int)(tsf & 0xFFFFFFFFULL));
 197
 198         return count;
 199 }
 200
 201 /* wl->irq_lock is locked */
 202 static int tsf_write_file(struct b43_wldev *dev,
 203                           const char *buf, size_t count)
 204 {
 205         u64 tsf;
 206
 207         if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
 208                 return -EINVAL;
 209         b43_tsf_write(dev, tsf);
 210
 211         return 0;
 212 }
 213
 214 /* wl->irq_lock is locked */
 215 static ssize_t ucode_regs_read_file(struct b43_wldev *dev,
 216                                     char *buf, size_t bufsize)
 217 {
 218         ssize_t count = 0;
 219         int i;
 220
 221         for (i = 0; i < 64; i++) {
 222                 fappend("r%d = 0x%04x\n", i,
 223                         b43_shm_read16(dev, B43_SHM_SCRATCH, i));
 224         }
 225
 226         return count;
 227 }
 228
 229 /* wl->irq_lock is locked */
 230 static ssize_t shm_read_file(struct b43_wldev *dev,
 231                              char *buf, size_t bufsize)
 232 {
 233         ssize_t count = 0;
 234         int i;
 235         u16 tmp;
 236         __le16 *le16buf = (__le16 *)buf;
 237
 238         for (i = 0; i < 0x1000; i++) {
 239                 if (bufsize < sizeof(tmp))
 240                         break;
 241                 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
 242                 le16buf[i] = cpu_to_le16(tmp);
 243                 count += sizeof(tmp);
 244                 bufsize -= sizeof(tmp);
 245         }
 246
 247         return count;
 248 }
 249
 250 static ssize_t txstat_read_file(struct b43_wldev *dev,
 251                                 char *buf, size_t bufsize)
 252 {
 253         struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
 254         ssize_t count = 0;
 255         unsigned long flags;
 256         int i, idx;
 257         struct b43_txstatus *stat;
 258
 259         spin_lock_irqsave(&log->lock, flags);
 260         if (log->end < 0) {
 261                 fappend("Nothing transmitted, yet\n");
 262                 goto out_unlock;
 263         }
 264         fappend("b43 TX status reports:\n\n"
 265                 "index | cookie | seq | phy_stat | frame_count | "
 266                 "rts_count | supp_reason | pm_indicated | "
 267                 "intermediate | for_ampdu | acked\n" "---\n");
 268         i = log->end + 1;
 269         idx = 0;
 270         while (1) {
 271                 if (i == B43_NR_LOGGED_TXSTATUS)
 272                         i = 0;
 273                 stat = &(log->log[i]);
 274                 if (stat->cookie) {
 275                         fappend("%03d | "
 276                                 "0x%04X | 0x%04X | 0x%02X | "
 277                                 "0x%X | 0x%X | "
 278                                 "%u | %u | "
 279                                 "%u | %u | %u\n",
 280                                 idx,
 281                                 stat->cookie, stat->seq, stat->phy_stat,
 282                                 stat->frame_count, stat->rts_count,
 283                                 stat->supp_reason, stat->pm_indicated,
 284                                 stat->intermediate, stat->for_ampdu,
 285                                 stat->acked);
 286                         idx++;
 287                 }
 288                 if (i == log->end)
 289                         break;
 290                 i++;
 291         }
 292 out_unlock:
 293         spin_unlock_irqrestore(&log->lock, flags);
 294
 295         return count;
 296 }
 297
 298 static ssize_t txpower_g_read_file(struct b43_wldev *dev,
 299                                    char *buf, size_t bufsize)
 300 {
 301         ssize_t count = 0;
 302
 303         if (dev->phy.type != B43_PHYTYPE_G) {
 304                 fappend("Device is not a G-PHY\n");
 305                 goto out;
 306         }
 307         fappend("Control:               %s\n", dev->phy.manual_txpower_control ?
 308                 "MANUAL" : "AUTOMATIC");
 309         fappend("Baseband attenuation:  %u\n", dev->phy.bbatt.att);
 310         fappend("Radio attenuation:     %u\n", dev->phy.rfatt.att);
 311         fappend("TX Mixer Gain:         %s\n",
 312                 (dev->phy.tx_control & B43_TXCTL_TXMIX) ? "ON" : "OFF");
 313         fappend("PA Gain 2dB:           %s\n",
 314                 (dev->phy.tx_control & B43_TXCTL_PA2DB) ? "ON" : "OFF");
 315         fappend("PA Gain 3dB:           %s\n",
 316                 (dev->phy.tx_control & B43_TXCTL_PA3DB) ? "ON" : "OFF");
 317         fappend("\n\n");
 318         fappend("You can write to this file:\n");
 319         fappend("Writing \"auto\" enables automatic txpower control.\n");
 320         fappend
 321             ("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
 322              "enables manual txpower control.\n");
 323         fappend("Example: 5 4 0 0 1\n");
 324         fappend("Enables manual control with Baseband attenuation 5, "
 325                 "Radio attenuation 4, No TX Mixer Gain, "
 326                 "No PA Gain 2dB, With PA Gain 3dB.\n");
 327 out:
 328         return count;
 329 }
 330
 331 static int txpower_g_write_file(struct b43_wldev *dev,
 332                                 const char *buf, size_t count)
 333 {
 334         if (dev->phy.type != B43_PHYTYPE_G)
 335                 return -ENODEV;
 336         if ((count >= 4) && (memcmp(buf, "auto", 4) == 0)) {
 337                 /* Automatic control */
 338                 dev->phy.manual_txpower_control = 0;
 339                 b43_phy_xmitpower(dev);
 340         } else {
 341                 int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
 342                 /* Manual control */
 343                 if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
 344                            &txmix, &pa2db, &pa3db) != 5)
 345                         return -EINVAL;
 346                 b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
 347                 dev->phy.manual_txpower_control = 1;
 348                 dev->phy.bbatt.att = bbatt;
 349                 dev->phy.rfatt.att = rfatt;
 350                 dev->phy.tx_control = 0;
 351                 if (txmix)
 352                         dev->phy.tx_control |= B43_TXCTL_TXMIX;
 353                 if (pa2db)
 354                         dev->phy.tx_control |= B43_TXCTL_PA2DB;
 355                 if (pa3db)
 356                         dev->phy.tx_control |= B43_TXCTL_PA3DB;
 357                 b43_phy_lock(dev);
 358                 b43_radio_lock(dev);
 359                 b43_set_txpower_g(dev, &dev->phy.bbatt,
 360                                   &dev->phy.rfatt, dev->phy.tx_control);
 361                 b43_radio_unlock(dev);
 362                 b43_phy_unlock(dev);
 363         }
 364
 365         return 0;
 366 }
 367
 368 /* wl->irq_lock is locked */
 369 static int restart_write_file(struct b43_wldev *dev,
 370                               const char *buf, size_t count)
 371 {
 372         int err = 0;
 373
 374         if (count > 0 && buf[0] == '1') {
 375                 b43_controller_restart(dev, "manually restarted");
 376         } else
 377                 err = -EINVAL;
 378
 379         return err;
 380 }
 381
 382 static unsigned long calc_expire_secs(unsigned long now,
 383                                       unsigned long time,
 384                                       unsigned long expire)
 385 {
 386         expire = time + expire;
 387
 388         if (time_after(now, expire))
 389                 return 0; /* expired */
 390         if (expire < now) {
 391                 /* jiffies wrapped */
 392                 expire -= MAX_JIFFY_OFFSET;
 393                 now -= MAX_JIFFY_OFFSET;
 394         }
 395         B43_WARN_ON(expire < now);
 396
 397         return (expire - now) / HZ;
 398 }
 399
 400 static ssize_t loctls_read_file(struct b43_wldev *dev,
 401                                 char *buf, size_t bufsize)
 402 {
 403         ssize_t count = 0;
 404         struct b43_txpower_lo_control *lo;
 405         int i, err = 0;
 406         struct b43_lo_calib *cal;
 407         unsigned long now = jiffies;
 408         struct b43_phy *phy = &dev->phy;
 409
 410         if (phy->type != B43_PHYTYPE_G) {
 411                 fappend("Device is not a G-PHY\n");
 412                 err = -ENODEV;
 413                 goto out;
 414         }
 415         lo = phy->lo_control;
 416         fappend("-- Local Oscillator calibration data --\n\n");
 417         fappend("HW-power-control enabled: %d\n",
 418                 dev->phy.hardware_power_control);
 419         fappend("TX Bias: 0x%02X,  TX Magn: 0x%02X  (expire in %lu sec)\n",
 420                 lo->tx_bias, lo->tx_magn,
 421                 calc_expire_secs(now, lo->txctl_measured_time,
 422                                  B43_LO_TXCTL_EXPIRE));
 423         fappend("Power Vector: 0x%08X%08X  (expires in %lu sec)\n",
 424                 (unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
 425                 (unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
 426                 calc_expire_secs(now, lo->pwr_vec_read_time,
 427                                  B43_LO_PWRVEC_EXPIRE));
 428
 429         fappend("\nCalibrated settings:\n");
 430         list_for_each_entry(cal, &lo->calib_list, list) {
 431                 bool active;
 432
 433                 active = (b43_compare_bbatt(&cal->bbatt, &phy->bbatt) &&
 434                           b43_compare_rfatt(&cal->rfatt, &phy->rfatt));
 435                 fappend("BB(%d), RF(%d,%d)  ->  I=%d, Q=%d  "
 436                         "(expires in %lu sec)%s\n",
 437                         cal->bbatt.att,
 438                         cal->rfatt.att, cal->rfatt.with_padmix,
 439                         cal->ctl.i, cal->ctl.q,
 440                         calc_expire_secs(now, cal->calib_time,
 441                                          B43_LO_CALIB_EXPIRE),
 442                         active ? "  ACTIVE" : "");
 443         }
 444
 445         fappend("\nUsed RF attenuation values:  Value(WithPadmix flag)\n");
 446         for (i = 0; i < lo->rfatt_list.len; i++) {
 447                 fappend("%u(%d), ",
 448                         lo->rfatt_list.list[i].att,
 449                         lo->rfatt_list.list[i].with_padmix);
 450         }
 451         fappend("\n");
 452         fappend("\nUsed Baseband attenuation values:\n");
 453         for (i = 0; i < lo->bbatt_list.len; i++) {
 454                 fappend("%u, ",
 455                         lo->bbatt_list.list[i].att);
 456         }
 457         fappend("\n");
 458
 459 out:
 460         return err ? err : count;
 461 }
 462
 463 #undef fappend
 464
 465 static int b43_debugfs_open(struct inode *inode, struct file *file)
 466 {
 467         file->private_data = inode->i_private;
 468         return 0;
 469 }
 470
 471 static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
 472                                 size_t count, loff_t *ppos)
 473 {
 474         struct b43_wldev *dev;
 475         struct b43_debugfs_fops *dfops;
 476         struct b43_dfs_file *dfile;
 477         ssize_t uninitialized_var(ret);
 478         char *buf;
 479         const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
 480         const size_t buforder = get_order(bufsize);
 481         int err = 0;
 482
 483         if (!count)
 484                 return 0;
 485         dev = file->private_data;
 486         if (!dev)
 487                 return -ENODEV;
 488
 489         mutex_lock(&dev->wl->mutex);
 490         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 491                 err = -ENODEV;
 492                 goto out_unlock;
 493         }
 494
 495         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 496         if (!dfops->read) {
 497                 err = -ENOSYS;
 498                 goto out_unlock;
 499         }
 500         dfile = fops_to_dfs_file(dev, dfops);
 501
 502         if (!dfile->buffer) {
 503                 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
 504                 if (!buf) {
 505                         err = -ENOMEM;
 506                         goto out_unlock;
 507                 }
 508                 memset(buf, 0, bufsize);
 509                 if (dfops->take_irqlock) {
 510                         spin_lock_irq(&dev->wl->irq_lock);
 511                         ret = dfops->read(dev, buf, bufsize);
 512                         spin_unlock_irq(&dev->wl->irq_lock);
 513                 } else
 514                         ret = dfops->read(dev, buf, bufsize);
 515                 if (ret <= 0) {
 516                         free_pages((unsigned long)buf, buforder);
 517                         err = ret;
 518                         goto out_unlock;
 519                 }
 520                 dfile->data_len = ret;
 521                 dfile->buffer = buf;
 522         }
 523
 524         ret = simple_read_from_buffer(userbuf, count, ppos,
 525                                       dfile->buffer,
 526                                       dfile->data_len);
 527         if (*ppos >= dfile->data_len) {
 528                 free_pages((unsigned long)dfile->buffer, buforder);
 529                 dfile->buffer = NULL;
 530                 dfile->data_len = 0;
 531         }
 532 out_unlock:
 533         mutex_unlock(&dev->wl->mutex);
 534
 535         return err ? err : ret;
 536 }
 537
 538 static ssize_t b43_debugfs_write(struct file *file,
 539                                  const char __user *userbuf,
 540                                  size_t count, loff_t *ppos)
 541 {
 542         struct b43_wldev *dev;
 543         struct b43_debugfs_fops *dfops;
 544         char *buf;
 545         int err = 0;
 546
 547         if (!count)
 548                 return 0;
 549         if (count > PAGE_SIZE)
 550                 return -E2BIG;
 551         dev = file->private_data;
 552         if (!dev)
 553                 return -ENODEV;
 554
 555         mutex_lock(&dev->wl->mutex);
 556         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 557                 err = -ENODEV;
 558                 goto out_unlock;
 559         }
 560
 561         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 562         if (!dfops->write) {
 563                 err = -ENOSYS;
 564                 goto out_unlock;
 565         }
 566
 567         buf = (char *)get_zeroed_page(GFP_KERNEL);
 568         if (!buf) {
 569                 err = -ENOMEM;
 570                 goto out_unlock;
 571         }
 572         if (copy_from_user(buf, userbuf, count)) {
 573                 err = -EFAULT;
 574                 goto out_freepage;
 575         }
 576         if (dfops->take_irqlock) {
 577                 spin_lock_irq(&dev->wl->irq_lock);
 578                 err = dfops->write(dev, buf, count);
 579                 spin_unlock_irq(&dev->wl->irq_lock);
 580         } else
 581                 err = dfops->write(dev, buf, count);
 582         if (err)
 583                 goto out_freepage;
 584
 585 out_freepage:
 586         free_page((unsigned long)buf);
 587 out_unlock:
 588         mutex_unlock(&dev->wl->mutex);
 589
 590         return err ? err : count;
 591 }
 592
 593
 594 #define B43_DEBUGFS_FOPS(name, _read, _write, _take_irqlock)    \
 595         static struct b43_debugfs_fops fops_##name = {          \
 596                 .read   = _read,                                \
 597                 .write  = _write,                               \
 598                 .fops   = {                                     \
 599                         .open   = b43_debugfs_open,             \
 600                         .read   = b43_debugfs_read,             \
 601                         .write  = b43_debugfs_write,            \
 602                 },                                              \
 603                 .file_struct_offset = offsetof(struct b43_dfsentry, \
 604                                                file_##name),    \
 605                 .take_irqlock   = _take_irqlock,                \
 606         }
 607
 608 B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file, 1);
 609 B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file, 1);
 610 B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file, 1);
 611 B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file, 1);
 612 B43_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
 613 B43_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
 614 B43_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
 615 B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
 616 B43_DEBUGFS_FOPS(txpower_g, txpower_g_read_file, txpower_g_write_file, 0);
 617 B43_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
 618 B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL, 0);
 619
 620
 621 int b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
 622 {
 623         return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
 624 }
 625
 626 static void b43_remove_dynamic_debug(struct b43_wldev *dev)
 627 {
 628         struct b43_dfsentry *e = dev->dfsentry;
 629         int i;
 630
 631         for (i = 0; i < __B43_NR_DYNDBG; i++)
 632                 debugfs_remove(e->dyn_debug_dentries[i]);
 633 }
 634
 635 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 636 {
 637         struct b43_dfsentry *e = dev->dfsentry;
 638         struct dentry *d;
 639
 640 #define add_dyn_dbg(name, id, initstate) do {           \
 641         e->dyn_debug[id] = (initstate);                 \
 642         d = debugfs_create_bool(name, 0600, e->subdir,  \
 643                                 &(e->dyn_debug[id]));   \
 644         if (!IS_ERR(d))                                 \
 645                 e->dyn_debug_dentries[id] = d;          \
 646                                 } while (0)
 647
 648         add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
 649         add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
 650         add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
 651         add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
 652         add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
 653         add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
 654
 655 #undef add_dyn_dbg
 656 }
 657
 658 void b43_debugfs_add_device(struct b43_wldev *dev)
 659 {
 660         struct b43_dfsentry *e;
 661         struct b43_txstatus_log *log;
 662         char devdir[16];
 663
 664         B43_WARN_ON(!dev);
 665         e = kzalloc(sizeof(*e), GFP_KERNEL);
 666         if (!e) {
 667                 b43err(dev->wl, "debugfs: add device OOM\n");
 668                 return;
 669         }
 670         e->dev = dev;
 671         log = &e->txstatlog;
 672         log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
 673                            sizeof(struct b43_txstatus), GFP_KERNEL);
 674         if (!log->log) {
 675                 b43err(dev->wl, "debugfs: add device txstatus OOM\n");
 676                 kfree(e);
 677                 return;
 678         }
 679         log->end = -1;
 680         spin_lock_init(&log->lock);
 681
 682         dev->dfsentry = e;
 683
 684         snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 685         e->subdir = debugfs_create_dir(devdir, rootdir);
 686         if (!e->subdir || IS_ERR(e->subdir)) {
 687                 if (e->subdir == ERR_PTR(-ENODEV)) {
 688                         b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
 689                                "enabled in kernel config\n");
 690                 } else {
 691                         b43err(dev->wl, "debugfs: cannot create %s directory\n",
 692                                devdir);
 693                 }
 694                 dev->dfsentry = NULL;
 695                 kfree(log->log);
 696                 kfree(e);
 697                 return;
 698         }
 699
 700         e->mmio16read_next = 0xFFFF; /* invalid address */
 701         e->mmio32read_next = 0xFFFF; /* invalid address */
 702
 703 #define ADD_FILE(name, mode)    \
 704         do {                                                    \
 705                 struct dentry *d;                               \
 706                 d = debugfs_create_file(__stringify(name),      \
 707                                         mode, e->subdir, dev,   \
 708                                         &fops_##name.fops);     \
 709                 e->file_##name.dentry = NULL;                   \
 710                 if (!IS_ERR(d))                                 \
 711                         e->file_##name.dentry = d;              \
 712         } while (0)
 713
 714
 715         ADD_FILE(mmio16read, 0600);
 716         ADD_FILE(mmio16write, 0200);
 717         ADD_FILE(mmio32read, 0600);
 718         ADD_FILE(mmio32write, 0200);
 719         ADD_FILE(tsf, 0600);
 720         ADD_FILE(ucode_regs, 0400);
 721         ADD_FILE(shm, 0400);
 722         ADD_FILE(txstat, 0400);
 723         ADD_FILE(txpower_g, 0600);
 724         ADD_FILE(restart, 0200);
 725         ADD_FILE(loctls, 0400);
 726
 727 #undef ADD_FILE
 728
 729         b43_add_dynamic_debug(dev);
 730 }
 731
 732 void b43_debugfs_remove_device(struct b43_wldev *dev)
 733 {
 734         struct b43_dfsentry *e;
 735
 736         if (!dev)
 737                 return;
 738         e = dev->dfsentry;
 739         if (!e)
 740                 return;
 741         b43_remove_dynamic_debug(dev);
 742
 743         debugfs_remove(e->file_mmio16read.dentry);
 744         debugfs_remove(e->file_mmio16write.dentry);
 745         debugfs_remove(e->file_mmio32read.dentry);
 746         debugfs_remove(e->file_mmio32write.dentry);
 747         debugfs_remove(e->file_tsf.dentry);
 748         debugfs_remove(e->file_ucode_regs.dentry);
 749         debugfs_remove(e->file_shm.dentry);
 750         debugfs_remove(e->file_txstat.dentry);
 751         debugfs_remove(e->file_txpower_g.dentry);
 752         debugfs_remove(e->file_restart.dentry);
 753         debugfs_remove(e->file_loctls.dentry);
 754
 755         debugfs_remove(e->subdir);
 756         kfree(e->txstatlog.log);
 757         kfree(e);
 758 }
 759
 760 /* Called with IRQs disabled. */
 761 void b43_debugfs_log_txstat(struct b43_wldev *dev,
 762                             const struct b43_txstatus *status)
 763 {
 764         struct b43_dfsentry *e = dev->dfsentry;
 765         struct b43_txstatus_log *log;
 766         struct b43_txstatus *cur;
 767         int i;
 768
 769         if (!e)
 770                 return;
 771         log = &e->txstatlog;
 772         spin_lock(&log->lock); /* IRQs are already disabled. */
 773         i = log->end + 1;
 774         if (i == B43_NR_LOGGED_TXSTATUS)
 775                 i = 0;
 776         log->end = i;
 777         cur = &(log->log[i]);
 778         memcpy(cur, status, sizeof(*cur));
 779         spin_unlock(&log->lock);
 780 }
 781
 782 void b43_debugfs_init(void)
 783 {
 784         rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 785         if (IS_ERR(rootdir))
 786                 rootdir = NULL;
 787 }
 788
 789 void b43_debugfs_exit(void)
 790 {
 791         debugfs_remove(rootdir);
 792 }