kernel/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 <m@bues.ch>
   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 };
  50
  51 static inline
  52 struct b43_dfs_file *fops_to_dfs_file(struct b43_wldev *dev,
  53                                       const struct b43_debugfs_fops *dfops)
  54 {
  55         void *p;
  56
  57         p = dev->dfsentry;
  58         p += dfops->file_struct_offset;
  59
  60         return p;
  61 }
  62
  63
  64 #define fappend(fmt, x...)      \
  65         do {                                                    \
  66                 if (bufsize - count)                            \
  67                         count += snprintf(buf + count,          \
  68                                           bufsize - count,      \
  69                                           fmt , ##x);           \
  70                 else                                            \
  71                         printk(KERN_ERR "b43: fappend overflow\n"); \
  72         } while (0)
  73
  74
  75 /* The biggest address values for SHM access from the debugfs files. */
  76 #define B43_MAX_SHM_ROUTING     4
  77 #define B43_MAX_SHM_ADDR        0xFFFF
  78
  79 static ssize_t shm16read__read_file(struct b43_wldev *dev,
  80                                     char *buf, size_t bufsize)
  81 {
  82         ssize_t count = 0;
  83         unsigned int routing, addr;
  84         u16 val;
  85
  86         routing = dev->dfsentry->shm16read_routing_next;
  87         addr = dev->dfsentry->shm16read_addr_next;
  88         if ((routing > B43_MAX_SHM_ROUTING) ||
  89             (addr > B43_MAX_SHM_ADDR))
  90                 return -EDESTADDRREQ;
  91
  92         val = b43_shm_read16(dev, routing, addr);
  93         fappend("0x%04X\n", val);
  94
  95         return count;
  96 }
  97
  98 static int shm16read__write_file(struct b43_wldev *dev,
  99                                  const char *buf, size_t count)
 100 {
 101         unsigned int routing, addr;
 102         int res;
 103
 104         res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
 105         if (res != 2)
 106                 return -EINVAL;
 107         if (routing > B43_MAX_SHM_ROUTING)
 108                 return -EADDRNOTAVAIL;
 109         if (addr > B43_MAX_SHM_ADDR)
 110                 return -EADDRNOTAVAIL;
 111         if (routing == B43_SHM_SHARED) {
 112                 if ((addr % 2) != 0)
 113                         return -EADDRNOTAVAIL;
 114         }
 115
 116         dev->dfsentry->shm16read_routing_next = routing;
 117         dev->dfsentry->shm16read_addr_next = addr;
 118
 119         return 0;
 120 }
 121
 122 static int shm16write__write_file(struct b43_wldev *dev,
 123                                   const char *buf, size_t count)
 124 {
 125         unsigned int routing, addr, mask, set;
 126         u16 val;
 127         int res;
 128
 129         res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
 130                      &routing, &addr, &mask, &set);
 131         if (res != 4)
 132                 return -EINVAL;
 133         if (routing > B43_MAX_SHM_ROUTING)
 134                 return -EADDRNOTAVAIL;
 135         if (addr > B43_MAX_SHM_ADDR)
 136                 return -EADDRNOTAVAIL;
 137         if (routing == B43_SHM_SHARED) {
 138                 if ((addr % 2) != 0)
 139                         return -EADDRNOTAVAIL;
 140         }
 141         if ((mask > 0xFFFF) || (set > 0xFFFF))
 142                 return -E2BIG;
 143
 144         if (mask == 0)
 145                 val = 0;
 146         else
 147                 val = b43_shm_read16(dev, routing, addr);
 148         val &= mask;
 149         val |= set;
 150         b43_shm_write16(dev, routing, addr, val);
 151
 152         return 0;
 153 }
 154
 155 static ssize_t shm32read__read_file(struct b43_wldev *dev,
 156                                     char *buf, size_t bufsize)
 157 {
 158         ssize_t count = 0;
 159         unsigned int routing, addr;
 160         u32 val;
 161
 162         routing = dev->dfsentry->shm32read_routing_next;
 163         addr = dev->dfsentry->shm32read_addr_next;
 164         if ((routing > B43_MAX_SHM_ROUTING) ||
 165             (addr > B43_MAX_SHM_ADDR))
 166                 return -EDESTADDRREQ;
 167
 168         val = b43_shm_read32(dev, routing, addr);
 169         fappend("0x%08X\n", val);
 170
 171         return count;
 172 }
 173
 174 static int shm32read__write_file(struct b43_wldev *dev,
 175                                  const char *buf, size_t count)
 176 {
 177         unsigned int routing, addr;
 178         int res;
 179
 180         res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
 181         if (res != 2)
 182                 return -EINVAL;
 183         if (routing > B43_MAX_SHM_ROUTING)
 184                 return -EADDRNOTAVAIL;
 185         if (addr > B43_MAX_SHM_ADDR)
 186                 return -EADDRNOTAVAIL;
 187         if (routing == B43_SHM_SHARED) {
 188                 if ((addr % 2) != 0)
 189                         return -EADDRNOTAVAIL;
 190         }
 191
 192         dev->dfsentry->shm32read_routing_next = routing;
 193         dev->dfsentry->shm32read_addr_next = addr;
 194
 195         return 0;
 196 }
 197
 198 static int shm32write__write_file(struct b43_wldev *dev,
 199                                   const char *buf, size_t count)
 200 {
 201         unsigned int routing, addr, mask, set;
 202         u32 val;
 203         int res;
 204
 205         res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
 206                      &routing, &addr, &mask, &set);
 207         if (res != 4)
 208                 return -EINVAL;
 209         if (routing > B43_MAX_SHM_ROUTING)
 210                 return -EADDRNOTAVAIL;
 211         if (addr > B43_MAX_SHM_ADDR)
 212                 return -EADDRNOTAVAIL;
 213         if (routing == B43_SHM_SHARED) {
 214                 if ((addr % 2) != 0)
 215                         return -EADDRNOTAVAIL;
 216         }
 217         if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
 218                 return -E2BIG;
 219
 220         if (mask == 0)
 221                 val = 0;
 222         else
 223                 val = b43_shm_read32(dev, routing, addr);
 224         val &= mask;
 225         val |= set;
 226         b43_shm_write32(dev, routing, addr, val);
 227
 228         return 0;
 229 }
 230
 231 /* The biggest MMIO address that we allow access to from the debugfs files. */
 232 #define B43_MAX_MMIO_ACCESS     (0xF00 - 1)
 233
 234 static ssize_t mmio16read__read_file(struct b43_wldev *dev,
 235                                      char *buf, size_t bufsize)
 236 {
 237         ssize_t count = 0;
 238         unsigned int addr;
 239         u16 val;
 240
 241         addr = dev->dfsentry->mmio16read_next;
 242         if (addr > B43_MAX_MMIO_ACCESS)
 243                 return -EDESTADDRREQ;
 244
 245         val = b43_read16(dev, addr);
 246         fappend("0x%04X\n", val);
 247
 248         return count;
 249 }
 250
 251 static int mmio16read__write_file(struct b43_wldev *dev,
 252                                   const char *buf, size_t count)
 253 {
 254         unsigned int addr;
 255         int res;
 256
 257         res = sscanf(buf, "0x%X", &addr);
 258         if (res != 1)
 259                 return -EINVAL;
 260         if (addr > B43_MAX_MMIO_ACCESS)
 261                 return -EADDRNOTAVAIL;
 262         if ((addr % 2) != 0)
 263                 return -EINVAL;
 264
 265         dev->dfsentry->mmio16read_next = addr;
 266
 267         return 0;
 268 }
 269
 270 static int mmio16write__write_file(struct b43_wldev *dev,
 271                                    const char *buf, size_t count)
 272 {
 273         unsigned int addr, mask, set;
 274         int res;
 275         u16 val;
 276
 277         res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
 278         if (res != 3)
 279                 return -EINVAL;
 280         if (addr > B43_MAX_MMIO_ACCESS)
 281                 return -EADDRNOTAVAIL;
 282         if ((mask > 0xFFFF) || (set > 0xFFFF))
 283                 return -E2BIG;
 284         if ((addr % 2) != 0)
 285                 return -EINVAL;
 286
 287         if (mask == 0)
 288                 val = 0;
 289         else
 290                 val = b43_read16(dev, addr);
 291         val &= mask;
 292         val |= set;
 293         b43_write16(dev, addr, val);
 294
 295         return 0;
 296 }
 297
 298 static ssize_t mmio32read__read_file(struct b43_wldev *dev,
 299                                      char *buf, size_t bufsize)
 300 {
 301         ssize_t count = 0;
 302         unsigned int addr;
 303         u32 val;
 304
 305         addr = dev->dfsentry->mmio32read_next;
 306         if (addr > B43_MAX_MMIO_ACCESS)
 307                 return -EDESTADDRREQ;
 308
 309         val = b43_read32(dev, addr);
 310         fappend("0x%08X\n", val);
 311
 312         return count;
 313 }
 314
 315 static int mmio32read__write_file(struct b43_wldev *dev,
 316                                   const char *buf, size_t count)
 317 {
 318         unsigned int addr;
 319         int res;
 320
 321         res = sscanf(buf, "0x%X", &addr);
 322         if (res != 1)
 323                 return -EINVAL;
 324         if (addr > B43_MAX_MMIO_ACCESS)
 325                 return -EADDRNOTAVAIL;
 326         if ((addr % 4) != 0)
 327                 return -EINVAL;
 328
 329         dev->dfsentry->mmio32read_next = addr;
 330
 331         return 0;
 332 }
 333
 334 static int mmio32write__write_file(struct b43_wldev *dev,
 335                                    const char *buf, size_t count)
 336 {
 337         unsigned int addr, mask, set;
 338         int res;
 339         u32 val;
 340
 341         res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
 342         if (res != 3)
 343                 return -EINVAL;
 344         if (addr > B43_MAX_MMIO_ACCESS)
 345                 return -EADDRNOTAVAIL;
 346         if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
 347                 return -E2BIG;
 348         if ((addr % 4) != 0)
 349                 return -EINVAL;
 350
 351         if (mask == 0)
 352                 val = 0;
 353         else
 354                 val = b43_read32(dev, addr);
 355         val &= mask;
 356         val |= set;
 357         b43_write32(dev, addr, val);
 358
 359         return 0;
 360 }
 361
 362 static ssize_t txstat_read_file(struct b43_wldev *dev,
 363                                 char *buf, size_t bufsize)
 364 {
 365         struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
 366         ssize_t count = 0;
 367         int i, idx;
 368         struct b43_txstatus *stat;
 369
 370         if (log->end < 0) {
 371                 fappend("Nothing transmitted, yet\n");
 372                 goto out;
 373         }
 374         fappend("b43 TX status reports:\n\n"
 375                 "index | cookie | seq | phy_stat | frame_count | "
 376                 "rts_count | supp_reason | pm_indicated | "
 377                 "intermediate | for_ampdu | acked\n" "---\n");
 378         i = log->end + 1;
 379         idx = 0;
 380         while (1) {
 381                 if (i == B43_NR_LOGGED_TXSTATUS)
 382                         i = 0;
 383                 stat = &(log->log[i]);
 384                 if (stat->cookie) {
 385                         fappend("%03d | "
 386                                 "0x%04X | 0x%04X | 0x%02X | "
 387                                 "0x%X | 0x%X | "
 388                                 "%u | %u | "
 389                                 "%u | %u | %u\n",
 390                                 idx,
 391                                 stat->cookie, stat->seq, stat->phy_stat,
 392                                 stat->frame_count, stat->rts_count,
 393                                 stat->supp_reason, stat->pm_indicated,
 394                                 stat->intermediate, stat->for_ampdu,
 395                                 stat->acked);
 396                         idx++;
 397                 }
 398                 if (i == log->end)
 399                         break;
 400                 i++;
 401         }
 402 out:
 403
 404         return count;
 405 }
 406
 407 static int restart_write_file(struct b43_wldev *dev,
 408                               const char *buf, size_t count)
 409 {
 410         int err = 0;
 411
 412         if (count > 0 && buf[0] == '1') {
 413                 b43_controller_restart(dev, "manually restarted");
 414         } else
 415                 err = -EINVAL;
 416
 417         return err;
 418 }
 419
 420 static unsigned long calc_expire_secs(unsigned long now,
 421                                       unsigned long time,
 422                                       unsigned long expire)
 423 {
 424         expire = time + expire;
 425
 426         if (time_after(now, expire))
 427                 return 0; /* expired */
 428         if (expire < now) {
 429                 /* jiffies wrapped */
 430                 expire -= MAX_JIFFY_OFFSET;
 431                 now -= MAX_JIFFY_OFFSET;
 432         }
 433         B43_WARN_ON(expire < now);
 434
 435         return (expire - now) / HZ;
 436 }
 437
 438 static ssize_t loctls_read_file(struct b43_wldev *dev,
 439                                 char *buf, size_t bufsize)
 440 {
 441         ssize_t count = 0;
 442         struct b43_txpower_lo_control *lo;
 443         int i, err = 0;
 444         struct b43_lo_calib *cal;
 445         unsigned long now = jiffies;
 446         struct b43_phy *phy = &dev->phy;
 447
 448         if (phy->type != B43_PHYTYPE_G) {
 449                 fappend("Device is not a G-PHY\n");
 450                 err = -ENODEV;
 451                 goto out;
 452         }
 453         lo = phy->g->lo_control;
 454         fappend("-- Local Oscillator calibration data --\n\n");
 455         fappend("HW-power-control enabled: %d\n",
 456                 dev->phy.hardware_power_control);
 457         fappend("TX Bias: 0x%02X,  TX Magn: 0x%02X  (expire in %lu sec)\n",
 458                 lo->tx_bias, lo->tx_magn,
 459                 calc_expire_secs(now, lo->txctl_measured_time,
 460                                  B43_LO_TXCTL_EXPIRE));
 461         fappend("Power Vector: 0x%08X%08X  (expires in %lu sec)\n",
 462                 (unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
 463                 (unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
 464                 calc_expire_secs(now, lo->pwr_vec_read_time,
 465                                  B43_LO_PWRVEC_EXPIRE));
 466
 467         fappend("\nCalibrated settings:\n");
 468         list_for_each_entry(cal, &lo->calib_list, list) {
 469                 bool active;
 470
 471                 active = (b43_compare_bbatt(&cal->bbatt, &phy->g->bbatt) &&
 472                           b43_compare_rfatt(&cal->rfatt, &phy->g->rfatt));
 473                 fappend("BB(%d), RF(%d,%d)  ->  I=%d, Q=%d  "
 474                         "(expires in %lu sec)%s\n",
 475                         cal->bbatt.att,
 476                         cal->rfatt.att, cal->rfatt.with_padmix,
 477                         cal->ctl.i, cal->ctl.q,
 478                         calc_expire_secs(now, cal->calib_time,
 479                                          B43_LO_CALIB_EXPIRE),
 480                         active ? "  ACTIVE" : "");
 481         }
 482
 483         fappend("\nUsed RF attenuation values:  Value(WithPadmix flag)\n");
 484         for (i = 0; i < lo->rfatt_list.len; i++) {
 485                 fappend("%u(%d), ",
 486                         lo->rfatt_list.list[i].att,
 487                         lo->rfatt_list.list[i].with_padmix);
 488         }
 489         fappend("\n");
 490         fappend("\nUsed Baseband attenuation values:\n");
 491         for (i = 0; i < lo->bbatt_list.len; i++) {
 492                 fappend("%u, ",
 493                         lo->bbatt_list.list[i].att);
 494         }
 495         fappend("\n");
 496
 497 out:
 498         return err ? err : count;
 499 }
 500
 501 #undef fappend
 502
 503 static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
 504                                 size_t count, loff_t *ppos)
 505 {
 506         struct b43_wldev *dev;
 507         struct b43_debugfs_fops *dfops;
 508         struct b43_dfs_file *dfile;
 509         ssize_t uninitialized_var(ret);
 510         char *buf;
 511         const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
 512         const size_t buforder = get_order(bufsize);
 513         int err = 0;
 514
 515         if (!count)
 516                 return 0;
 517         dev = file->private_data;
 518         if (!dev)
 519                 return -ENODEV;
 520
 521         mutex_lock(&dev->wl->mutex);
 522         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 523                 err = -ENODEV;
 524                 goto out_unlock;
 525         }
 526
 527         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 528         if (!dfops->read) {
 529                 err = -ENOSYS;
 530                 goto out_unlock;
 531         }
 532         dfile = fops_to_dfs_file(dev, dfops);
 533
 534         if (!dfile->buffer) {
 535                 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
 536                 if (!buf) {
 537                         err = -ENOMEM;
 538                         goto out_unlock;
 539                 }
 540                 memset(buf, 0, bufsize);
 541                 ret = dfops->read(dev, buf, bufsize);
 542                 if (ret <= 0) {
 543                         free_pages((unsigned long)buf, buforder);
 544                         err = ret;
 545                         goto out_unlock;
 546                 }
 547                 dfile->data_len = ret;
 548                 dfile->buffer = buf;
 549         }
 550
 551         ret = simple_read_from_buffer(userbuf, count, ppos,
 552                                       dfile->buffer,
 553                                       dfile->data_len);
 554         if (*ppos >= dfile->data_len) {
 555                 free_pages((unsigned long)dfile->buffer, buforder);
 556                 dfile->buffer = NULL;
 557                 dfile->data_len = 0;
 558         }
 559 out_unlock:
 560         mutex_unlock(&dev->wl->mutex);
 561
 562         return err ? err : ret;
 563 }
 564
 565 static ssize_t b43_debugfs_write(struct file *file,
 566                                  const char __user *userbuf,
 567                                  size_t count, loff_t *ppos)
 568 {
 569         struct b43_wldev *dev;
 570         struct b43_debugfs_fops *dfops;
 571         char *buf;
 572         int err = 0;
 573
 574         if (!count)
 575                 return 0;
 576         if (count > PAGE_SIZE)
 577                 return -E2BIG;
 578         dev = file->private_data;
 579         if (!dev)
 580                 return -ENODEV;
 581
 582         mutex_lock(&dev->wl->mutex);
 583         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 584                 err = -ENODEV;
 585                 goto out_unlock;
 586         }
 587
 588         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 589         if (!dfops->write) {
 590                 err = -ENOSYS;
 591                 goto out_unlock;
 592         }
 593
 594         buf = (char *)get_zeroed_page(GFP_KERNEL);
 595         if (!buf) {
 596                 err = -ENOMEM;
 597                 goto out_unlock;
 598         }
 599         if (copy_from_user(buf, userbuf, count)) {
 600                 err = -EFAULT;
 601                 goto out_freepage;
 602         }
 603         err = dfops->write(dev, buf, count);
 604         if (err)
 605                 goto out_freepage;
 606
 607 out_freepage:
 608         free_page((unsigned long)buf);
 609 out_unlock:
 610         mutex_unlock(&dev->wl->mutex);
 611
 612         return err ? err : count;
 613 }
 614
 615
 616 #define B43_DEBUGFS_FOPS(name, _read, _write)                   \
 617         static struct b43_debugfs_fops fops_##name = {          \
 618                 .read   = _read,                                \
 619                 .write  = _write,                               \
 620                 .fops   = {                                     \
 621                         .open   = simple_open,                  \
 622                         .read   = b43_debugfs_read,             \
 623                         .write  = b43_debugfs_write,            \
 624                         .llseek = generic_file_llseek,          \
 625                 },                                              \
 626                 .file_struct_offset = offsetof(struct b43_dfsentry, \
 627                                                file_##name),    \
 628         }
 629
 630 B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file);
 631 B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file);
 632 B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file);
 633 B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file);
 634 B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file);
 635 B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file);
 636 B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file);
 637 B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file);
 638 B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL);
 639 B43_DEBUGFS_FOPS(restart, NULL, restart_write_file);
 640 B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL);
 641
 642
 643 bool b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
 644 {
 645         bool enabled;
 646
 647         enabled = (dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
 648         if (unlikely(enabled)) {
 649                 /* Force full debugging messages, if the user enabled
 650                  * some dynamic debugging feature. */
 651                 b43_modparam_verbose = B43_VERBOSITY_MAX;
 652         }
 653
 654         return enabled;
 655 }
 656
 657 static void b43_remove_dynamic_debug(struct b43_wldev *dev)
 658 {
 659         struct b43_dfsentry *e = dev->dfsentry;
 660         int i;
 661
 662         for (i = 0; i < __B43_NR_DYNDBG; i++)
 663                 debugfs_remove(e->dyn_debug_dentries[i]);
 664 }
 665
 666 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 667 {
 668         struct b43_dfsentry *e = dev->dfsentry;
 669         struct dentry *d;
 670
 671 #define add_dyn_dbg(name, id, initstate) do {           \
 672         e->dyn_debug[id] = (initstate);                 \
 673         d = debugfs_create_bool(name, 0600, e->subdir,  \
 674                                 &(e->dyn_debug[id]));   \
 675         if (!IS_ERR(d))                                 \
 676                 e->dyn_debug_dentries[id] = d;          \
 677                                 } while (0)
 678
 679         add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
 680         add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
 681         add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
 682         add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
 683         add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
 684         add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
 685         add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, 0);
 686         add_dyn_dbg("debug_keys", B43_DBG_KEYS, 0);
 687         add_dyn_dbg("debug_verbose_stats", B43_DBG_VERBOSESTATS, 0);
 688
 689 #undef add_dyn_dbg
 690 }
 691
 692 void b43_debugfs_add_device(struct b43_wldev *dev)
 693 {
 694         struct b43_dfsentry *e;
 695         struct b43_txstatus_log *log;
 696         char devdir[16];
 697
 698         B43_WARN_ON(!dev);
 699         e = kzalloc(sizeof(*e), GFP_KERNEL);
 700         if (!e) {
 701                 b43err(dev->wl, "debugfs: add device OOM\n");
 702                 return;
 703         }
 704         e->dev = dev;
 705         log = &e->txstatlog;
 706         log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
 707                            sizeof(struct b43_txstatus), GFP_KERNEL);
 708         if (!log->log) {
 709                 b43err(dev->wl, "debugfs: add device txstatus OOM\n");
 710                 kfree(e);
 711                 return;
 712         }
 713         log->end = -1;
 714
 715         dev->dfsentry = e;
 716
 717         snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 718         e->subdir = debugfs_create_dir(devdir, rootdir);
 719         if (!e->subdir || IS_ERR(e->subdir)) {
 720                 if (e->subdir == ERR_PTR(-ENODEV)) {
 721                         b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
 722                                "enabled in kernel config\n");
 723                 } else {
 724                         b43err(dev->wl, "debugfs: cannot create %s directory\n",
 725                                devdir);
 726                 }
 727                 dev->dfsentry = NULL;
 728                 kfree(log->log);
 729                 kfree(e);
 730                 return;
 731         }
 732
 733         e->mmio16read_next = 0xFFFF; /* invalid address */
 734         e->mmio32read_next = 0xFFFF; /* invalid address */
 735         e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */
 736         e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */
 737         e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */
 738         e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */
 739
 740 #define ADD_FILE(name, mode)    \
 741         do {                                                    \
 742                 struct dentry *d;                               \
 743                 d = debugfs_create_file(__stringify(name),      \
 744                                         mode, e->subdir, dev,   \
 745                                         &fops_##name.fops);     \
 746                 e->file_##name.dentry = NULL;                   \
 747                 if (!IS_ERR(d))                                 \
 748                         e->file_##name.dentry = d;              \
 749         } while (0)
 750
 751
 752         ADD_FILE(shm16read, 0600);
 753         ADD_FILE(shm16write, 0200);
 754         ADD_FILE(shm32read, 0600);
 755         ADD_FILE(shm32write, 0200);
 756         ADD_FILE(mmio16read, 0600);
 757         ADD_FILE(mmio16write, 0200);
 758         ADD_FILE(mmio32read, 0600);
 759         ADD_FILE(mmio32write, 0200);
 760         ADD_FILE(txstat, 0400);
 761         ADD_FILE(restart, 0200);
 762         ADD_FILE(loctls, 0400);
 763
 764 #undef ADD_FILE
 765
 766         b43_add_dynamic_debug(dev);
 767 }
 768
 769 void b43_debugfs_remove_device(struct b43_wldev *dev)
 770 {
 771         struct b43_dfsentry *e;
 772
 773         if (!dev)
 774                 return;
 775         e = dev->dfsentry;
 776         if (!e)
 777                 return;
 778         b43_remove_dynamic_debug(dev);
 779
 780         debugfs_remove(e->file_shm16read.dentry);
 781         debugfs_remove(e->file_shm16write.dentry);
 782         debugfs_remove(e->file_shm32read.dentry);
 783         debugfs_remove(e->file_shm32write.dentry);
 784         debugfs_remove(e->file_mmio16read.dentry);
 785         debugfs_remove(e->file_mmio16write.dentry);
 786         debugfs_remove(e->file_mmio32read.dentry);
 787         debugfs_remove(e->file_mmio32write.dentry);
 788         debugfs_remove(e->file_txstat.dentry);
 789         debugfs_remove(e->file_restart.dentry);
 790         debugfs_remove(e->file_loctls.dentry);
 791
 792         debugfs_remove(e->subdir);
 793         kfree(e->txstatlog.log);
 794         kfree(e);
 795 }
 796
 797 void b43_debugfs_log_txstat(struct b43_wldev *dev,
 798                             const struct b43_txstatus *status)
 799 {
 800         struct b43_dfsentry *e = dev->dfsentry;
 801         struct b43_txstatus_log *log;
 802         struct b43_txstatus *cur;
 803         int i;
 804
 805         if (!e)
 806                 return;
 807         log = &e->txstatlog;
 808         i = log->end + 1;
 809         if (i == B43_NR_LOGGED_TXSTATUS)
 810                 i = 0;
 811         log->end = i;
 812         cur = &(log->log[i]);
 813         memcpy(cur, status, sizeof(*cur));
 814 }
 815
 816 void b43_debugfs_init(void)
 817 {
 818         rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 819         if (IS_ERR(rootdir))
 820                 rootdir = NULL;
 821 }
 822
 823 void b43_debugfs_exit(void)
 824 {
 825         debugfs_remove(rootdir);
 826 }