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 address values for SHM access from the debugfs files. */
  78 #define B43_MAX_SHM_ROUTING     4
  79 #define B43_MAX_SHM_ADDR        0xFFFF
  80
  81 static ssize_t shm16read__read_file(struct b43_wldev *dev,
  82                                     char *buf, size_t bufsize)
  83 {
  84         ssize_t count = 0;
  85         unsigned int routing, addr;
  86         u16 val;
  87
  88         routing = dev->dfsentry->shm16read_routing_next;
  89         addr = dev->dfsentry->shm16read_addr_next;
  90         if ((routing > B43_MAX_SHM_ROUTING) ||
  91             (addr > B43_MAX_SHM_ADDR))
  92                 return -EDESTADDRREQ;
  93
  94         val = b43_shm_read16(dev, routing, addr);
  95         fappend("0x%04X\n", val);
  96
  97         return count;
  98 }
  99
 100 static int shm16read__write_file(struct b43_wldev *dev,
 101                                  const char *buf, size_t count)
 102 {
 103         unsigned int routing, addr;
 104         int res;
 105
 106         res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
 107         if (res != 2)
 108                 return -EINVAL;
 109         if (routing > B43_MAX_SHM_ROUTING)
 110                 return -EADDRNOTAVAIL;
 111         if (addr > B43_MAX_SHM_ADDR)
 112                 return -EADDRNOTAVAIL;
 113         if (routing == B43_SHM_SHARED) {
 114                 if ((addr % 2) != 0)
 115                         return -EADDRNOTAVAIL;
 116         }
 117
 118         dev->dfsentry->shm16read_routing_next = routing;
 119         dev->dfsentry->shm16read_addr_next = addr;
 120
 121         return 0;
 122 }
 123
 124 static int shm16write__write_file(struct b43_wldev *dev,
 125                                   const char *buf, size_t count)
 126 {
 127         unsigned int routing, addr, mask, set;
 128         u16 val;
 129         int res;
 130         unsigned long flags;
 131
 132         res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
 133                      &routing, &addr, &mask, &set);
 134         if (res != 4)
 135                 return -EINVAL;
 136         if (routing > B43_MAX_SHM_ROUTING)
 137                 return -EADDRNOTAVAIL;
 138         if (addr > B43_MAX_SHM_ADDR)
 139                 return -EADDRNOTAVAIL;
 140         if (routing == B43_SHM_SHARED) {
 141                 if ((addr % 2) != 0)
 142                         return -EADDRNOTAVAIL;
 143         }
 144         if ((mask > 0xFFFF) || (set > 0xFFFF))
 145                 return -E2BIG;
 146
 147         spin_lock_irqsave(&dev->wl->shm_lock, flags);
 148         if (mask == 0)
 149                 val = 0;
 150         else
 151                 val = __b43_shm_read16(dev, routing, addr);
 152         val &= mask;
 153         val |= set;
 154         __b43_shm_write16(dev, routing, addr, val);
 155         spin_unlock_irqrestore(&dev->wl->shm_lock, flags);
 156
 157         return 0;
 158 }
 159
 160 static ssize_t shm32read__read_file(struct b43_wldev *dev,
 161                                     char *buf, size_t bufsize)
 162 {
 163         ssize_t count = 0;
 164         unsigned int routing, addr;
 165         u32 val;
 166
 167         routing = dev->dfsentry->shm32read_routing_next;
 168         addr = dev->dfsentry->shm32read_addr_next;
 169         if ((routing > B43_MAX_SHM_ROUTING) ||
 170             (addr > B43_MAX_SHM_ADDR))
 171                 return -EDESTADDRREQ;
 172
 173         val = b43_shm_read32(dev, routing, addr);
 174         fappend("0x%08X\n", val);
 175
 176         return count;
 177 }
 178
 179 static int shm32read__write_file(struct b43_wldev *dev,
 180                                  const char *buf, size_t count)
 181 {
 182         unsigned int routing, addr;
 183         int res;
 184
 185         res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
 186         if (res != 2)
 187                 return -EINVAL;
 188         if (routing > B43_MAX_SHM_ROUTING)
 189                 return -EADDRNOTAVAIL;
 190         if (addr > B43_MAX_SHM_ADDR)
 191                 return -EADDRNOTAVAIL;
 192         if (routing == B43_SHM_SHARED) {
 193                 if ((addr % 2) != 0)
 194                         return -EADDRNOTAVAIL;
 195         }
 196
 197         dev->dfsentry->shm32read_routing_next = routing;
 198         dev->dfsentry->shm32read_addr_next = addr;
 199
 200         return 0;
 201 }
 202
 203 static int shm32write__write_file(struct b43_wldev *dev,
 204                                   const char *buf, size_t count)
 205 {
 206         unsigned int routing, addr, mask, set;
 207         u32 val;
 208         int res;
 209         unsigned long flags;
 210
 211         res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
 212                      &routing, &addr, &mask, &set);
 213         if (res != 4)
 214                 return -EINVAL;
 215         if (routing > B43_MAX_SHM_ROUTING)
 216                 return -EADDRNOTAVAIL;
 217         if (addr > B43_MAX_SHM_ADDR)
 218                 return -EADDRNOTAVAIL;
 219         if (routing == B43_SHM_SHARED) {
 220                 if ((addr % 2) != 0)
 221                         return -EADDRNOTAVAIL;
 222         }
 223         if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
 224                 return -E2BIG;
 225
 226         spin_lock_irqsave(&dev->wl->shm_lock, flags);
 227         if (mask == 0)
 228                 val = 0;
 229         else
 230                 val = __b43_shm_read32(dev, routing, addr);
 231         val &= mask;
 232         val |= set;
 233         __b43_shm_write32(dev, routing, addr, val);
 234         spin_unlock_irqrestore(&dev->wl->shm_lock, flags);
 235
 236         return 0;
 237 }
 238
 239 /* The biggest MMIO address that we allow access to from the debugfs files. */
 240 #define B43_MAX_MMIO_ACCESS     (0xF00 - 1)
 241
 242 static ssize_t mmio16read__read_file(struct b43_wldev *dev,
 243                                      char *buf, size_t bufsize)
 244 {
 245         ssize_t count = 0;
 246         unsigned int addr;
 247         u16 val;
 248
 249         addr = dev->dfsentry->mmio16read_next;
 250         if (addr > B43_MAX_MMIO_ACCESS)
 251                 return -EDESTADDRREQ;
 252
 253         val = b43_read16(dev, addr);
 254         fappend("0x%04X\n", val);
 255
 256         return count;
 257 }
 258
 259 static int mmio16read__write_file(struct b43_wldev *dev,
 260                                   const char *buf, size_t count)
 261 {
 262         unsigned int addr;
 263         int res;
 264
 265         res = sscanf(buf, "0x%X", &addr);
 266         if (res != 1)
 267                 return -EINVAL;
 268         if (addr > B43_MAX_MMIO_ACCESS)
 269                 return -EADDRNOTAVAIL;
 270         if ((addr % 2) != 0)
 271                 return -EINVAL;
 272
 273         dev->dfsentry->mmio16read_next = addr;
 274
 275         return 0;
 276 }
 277
 278 static int mmio16write__write_file(struct b43_wldev *dev,
 279                                    const char *buf, size_t count)
 280 {
 281         unsigned int addr, mask, set;
 282         int res;
 283         u16 val;
 284
 285         res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
 286         if (res != 3)
 287                 return -EINVAL;
 288         if (addr > B43_MAX_MMIO_ACCESS)
 289                 return -EADDRNOTAVAIL;
 290         if ((mask > 0xFFFF) || (set > 0xFFFF))
 291                 return -E2BIG;
 292         if ((addr % 2) != 0)
 293                 return -EINVAL;
 294
 295         if (mask == 0)
 296                 val = 0;
 297         else
 298                 val = b43_read16(dev, addr);
 299         val &= mask;
 300         val |= set;
 301         b43_write16(dev, addr, val);
 302
 303         return 0;
 304 }
 305
 306 static ssize_t mmio32read__read_file(struct b43_wldev *dev,
 307                                      char *buf, size_t bufsize)
 308 {
 309         ssize_t count = 0;
 310         unsigned int addr;
 311         u32 val;
 312
 313         addr = dev->dfsentry->mmio32read_next;
 314         if (addr > B43_MAX_MMIO_ACCESS)
 315                 return -EDESTADDRREQ;
 316
 317         val = b43_read32(dev, addr);
 318         fappend("0x%08X\n", val);
 319
 320         return count;
 321 }
 322
 323 static int mmio32read__write_file(struct b43_wldev *dev,
 324                                   const char *buf, size_t count)
 325 {
 326         unsigned int addr;
 327         int res;
 328
 329         res = sscanf(buf, "0x%X", &addr);
 330         if (res != 1)
 331                 return -EINVAL;
 332         if (addr > B43_MAX_MMIO_ACCESS)
 333                 return -EADDRNOTAVAIL;
 334         if ((addr % 4) != 0)
 335                 return -EINVAL;
 336
 337         dev->dfsentry->mmio32read_next = addr;
 338
 339         return 0;
 340 }
 341
 342 static int mmio32write__write_file(struct b43_wldev *dev,
 343                                    const char *buf, size_t count)
 344 {
 345         unsigned int addr, mask, set;
 346         int res;
 347         u32 val;
 348
 349         res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
 350         if (res != 3)
 351                 return -EINVAL;
 352         if (addr > B43_MAX_MMIO_ACCESS)
 353                 return -EADDRNOTAVAIL;
 354         if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
 355                 return -E2BIG;
 356         if ((addr % 4) != 0)
 357                 return -EINVAL;
 358
 359         if (mask == 0)
 360                 val = 0;
 361         else
 362                 val = b43_read32(dev, addr);
 363         val &= mask;
 364         val |= set;
 365         b43_write32(dev, addr, val);
 366
 367         return 0;
 368 }
 369
 370 /* wl->irq_lock is locked */
 371 static ssize_t tsf_read_file(struct b43_wldev *dev,
 372                              char *buf, size_t bufsize)
 373 {
 374         ssize_t count = 0;
 375         u64 tsf;
 376
 377         b43_tsf_read(dev, &tsf);
 378         fappend("0x%08x%08x\n",
 379                 (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
 380                 (unsigned int)(tsf & 0xFFFFFFFFULL));
 381
 382         return count;
 383 }
 384
 385 /* wl->irq_lock is locked */
 386 static int tsf_write_file(struct b43_wldev *dev,
 387                           const char *buf, size_t count)
 388 {
 389         u64 tsf;
 390
 391         if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
 392                 return -EINVAL;
 393         b43_tsf_write(dev, tsf);
 394
 395         return 0;
 396 }
 397
 398 static ssize_t txstat_read_file(struct b43_wldev *dev,
 399                                 char *buf, size_t bufsize)
 400 {
 401         struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
 402         ssize_t count = 0;
 403         unsigned long flags;
 404         int i, idx;
 405         struct b43_txstatus *stat;
 406
 407         spin_lock_irqsave(&log->lock, flags);
 408         if (log->end < 0) {
 409                 fappend("Nothing transmitted, yet\n");
 410                 goto out_unlock;
 411         }
 412         fappend("b43 TX status reports:\n\n"
 413                 "index | cookie | seq | phy_stat | frame_count | "
 414                 "rts_count | supp_reason | pm_indicated | "
 415                 "intermediate | for_ampdu | acked\n" "---\n");
 416         i = log->end + 1;
 417         idx = 0;
 418         while (1) {
 419                 if (i == B43_NR_LOGGED_TXSTATUS)
 420                         i = 0;
 421                 stat = &(log->log[i]);
 422                 if (stat->cookie) {
 423                         fappend("%03d | "
 424                                 "0x%04X | 0x%04X | 0x%02X | "
 425                                 "0x%X | 0x%X | "
 426                                 "%u | %u | "
 427                                 "%u | %u | %u\n",
 428                                 idx,
 429                                 stat->cookie, stat->seq, stat->phy_stat,
 430                                 stat->frame_count, stat->rts_count,
 431                                 stat->supp_reason, stat->pm_indicated,
 432                                 stat->intermediate, stat->for_ampdu,
 433                                 stat->acked);
 434                         idx++;
 435                 }
 436                 if (i == log->end)
 437                         break;
 438                 i++;
 439         }
 440 out_unlock:
 441         spin_unlock_irqrestore(&log->lock, flags);
 442
 443         return count;
 444 }
 445
 446 static ssize_t txpower_g_read_file(struct b43_wldev *dev,
 447                                    char *buf, size_t bufsize)
 448 {
 449         ssize_t count = 0;
 450
 451         if (dev->phy.type != B43_PHYTYPE_G) {
 452                 fappend("Device is not a G-PHY\n");
 453                 goto out;
 454         }
 455         fappend("Control:               %s\n", dev->phy.manual_txpower_control ?
 456                 "MANUAL" : "AUTOMATIC");
 457         fappend("Baseband attenuation:  %u\n", dev->phy.bbatt.att);
 458         fappend("Radio attenuation:     %u\n", dev->phy.rfatt.att);
 459         fappend("TX Mixer Gain:         %s\n",
 460                 (dev->phy.tx_control & B43_TXCTL_TXMIX) ? "ON" : "OFF");
 461         fappend("PA Gain 2dB:           %s\n",
 462                 (dev->phy.tx_control & B43_TXCTL_PA2DB) ? "ON" : "OFF");
 463         fappend("PA Gain 3dB:           %s\n",
 464                 (dev->phy.tx_control & B43_TXCTL_PA3DB) ? "ON" : "OFF");
 465         fappend("\n\n");
 466         fappend("You can write to this file:\n");
 467         fappend("Writing \"auto\" enables automatic txpower control.\n");
 468         fappend
 469             ("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
 470              "enables manual txpower control.\n");
 471         fappend("Example: 5 4 0 0 1\n");
 472         fappend("Enables manual control with Baseband attenuation 5, "
 473                 "Radio attenuation 4, No TX Mixer Gain, "
 474                 "No PA Gain 2dB, With PA Gain 3dB.\n");
 475 out:
 476         return count;
 477 }
 478
 479 static int txpower_g_write_file(struct b43_wldev *dev,
 480                                 const char *buf, size_t count)
 481 {
 482         if (dev->phy.type != B43_PHYTYPE_G)
 483                 return -ENODEV;
 484         if ((count >= 4) && (memcmp(buf, "auto", 4) == 0)) {
 485                 /* Automatic control */
 486                 dev->phy.manual_txpower_control = 0;
 487                 b43_phy_xmitpower(dev);
 488         } else {
 489                 int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
 490                 /* Manual control */
 491                 if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
 492                            &txmix, &pa2db, &pa3db) != 5)
 493                         return -EINVAL;
 494                 b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
 495                 dev->phy.manual_txpower_control = 1;
 496                 dev->phy.bbatt.att = bbatt;
 497                 dev->phy.rfatt.att = rfatt;
 498                 dev->phy.tx_control = 0;
 499                 if (txmix)
 500                         dev->phy.tx_control |= B43_TXCTL_TXMIX;
 501                 if (pa2db)
 502                         dev->phy.tx_control |= B43_TXCTL_PA2DB;
 503                 if (pa3db)
 504                         dev->phy.tx_control |= B43_TXCTL_PA3DB;
 505                 b43_phy_lock(dev);
 506                 b43_radio_lock(dev);
 507                 b43_set_txpower_g(dev, &dev->phy.bbatt,
 508                                   &dev->phy.rfatt, dev->phy.tx_control);
 509                 b43_radio_unlock(dev);
 510                 b43_phy_unlock(dev);
 511         }
 512
 513         return 0;
 514 }
 515
 516 /* wl->irq_lock is locked */
 517 static int restart_write_file(struct b43_wldev *dev,
 518                               const char *buf, size_t count)
 519 {
 520         int err = 0;
 521
 522         if (count > 0 && buf[0] == '1') {
 523                 b43_controller_restart(dev, "manually restarted");
 524         } else
 525                 err = -EINVAL;
 526
 527         return err;
 528 }
 529
 530 static unsigned long calc_expire_secs(unsigned long now,
 531                                       unsigned long time,
 532                                       unsigned long expire)
 533 {
 534         expire = time + expire;
 535
 536         if (time_after(now, expire))
 537                 return 0; /* expired */
 538         if (expire < now) {
 539                 /* jiffies wrapped */
 540                 expire -= MAX_JIFFY_OFFSET;
 541                 now -= MAX_JIFFY_OFFSET;
 542         }
 543         B43_WARN_ON(expire < now);
 544
 545         return (expire - now) / HZ;
 546 }
 547
 548 static ssize_t loctls_read_file(struct b43_wldev *dev,
 549                                 char *buf, size_t bufsize)
 550 {
 551         ssize_t count = 0;
 552         struct b43_txpower_lo_control *lo;
 553         int i, err = 0;
 554         struct b43_lo_calib *cal;
 555         unsigned long now = jiffies;
 556         struct b43_phy *phy = &dev->phy;
 557
 558         if (phy->type != B43_PHYTYPE_G) {
 559                 fappend("Device is not a G-PHY\n");
 560                 err = -ENODEV;
 561                 goto out;
 562         }
 563         lo = phy->lo_control;
 564         fappend("-- Local Oscillator calibration data --\n\n");
 565         fappend("HW-power-control enabled: %d\n",
 566                 dev->phy.hardware_power_control);
 567         fappend("TX Bias: 0x%02X,  TX Magn: 0x%02X  (expire in %lu sec)\n",
 568                 lo->tx_bias, lo->tx_magn,
 569                 calc_expire_secs(now, lo->txctl_measured_time,
 570                                  B43_LO_TXCTL_EXPIRE));
 571         fappend("Power Vector: 0x%08X%08X  (expires in %lu sec)\n",
 572                 (unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
 573                 (unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
 574                 calc_expire_secs(now, lo->pwr_vec_read_time,
 575                                  B43_LO_PWRVEC_EXPIRE));
 576
 577         fappend("\nCalibrated settings:\n");
 578         list_for_each_entry(cal, &lo->calib_list, list) {
 579                 bool active;
 580
 581                 active = (b43_compare_bbatt(&cal->bbatt, &phy->bbatt) &&
 582                           b43_compare_rfatt(&cal->rfatt, &phy->rfatt));
 583                 fappend("BB(%d), RF(%d,%d)  ->  I=%d, Q=%d  "
 584                         "(expires in %lu sec)%s\n",
 585                         cal->bbatt.att,
 586                         cal->rfatt.att, cal->rfatt.with_padmix,
 587                         cal->ctl.i, cal->ctl.q,
 588                         calc_expire_secs(now, cal->calib_time,
 589                                          B43_LO_CALIB_EXPIRE),
 590                         active ? "  ACTIVE" : "");
 591         }
 592
 593         fappend("\nUsed RF attenuation values:  Value(WithPadmix flag)\n");
 594         for (i = 0; i < lo->rfatt_list.len; i++) {
 595                 fappend("%u(%d), ",
 596                         lo->rfatt_list.list[i].att,
 597                         lo->rfatt_list.list[i].with_padmix);
 598         }
 599         fappend("\n");
 600         fappend("\nUsed Baseband attenuation values:\n");
 601         for (i = 0; i < lo->bbatt_list.len; i++) {
 602                 fappend("%u, ",
 603                         lo->bbatt_list.list[i].att);
 604         }
 605         fappend("\n");
 606
 607 out:
 608         return err ? err : count;
 609 }
 610
 611 #undef fappend
 612
 613 static int b43_debugfs_open(struct inode *inode, struct file *file)
 614 {
 615         file->private_data = inode->i_private;
 616         return 0;
 617 }
 618
 619 static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
 620                                 size_t count, loff_t *ppos)
 621 {
 622         struct b43_wldev *dev;
 623         struct b43_debugfs_fops *dfops;
 624         struct b43_dfs_file *dfile;
 625         ssize_t uninitialized_var(ret);
 626         char *buf;
 627         const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
 628         const size_t buforder = get_order(bufsize);
 629         int err = 0;
 630
 631         if (!count)
 632                 return 0;
 633         dev = file->private_data;
 634         if (!dev)
 635                 return -ENODEV;
 636
 637         mutex_lock(&dev->wl->mutex);
 638         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 639                 err = -ENODEV;
 640                 goto out_unlock;
 641         }
 642
 643         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 644         if (!dfops->read) {
 645                 err = -ENOSYS;
 646                 goto out_unlock;
 647         }
 648         dfile = fops_to_dfs_file(dev, dfops);
 649
 650         if (!dfile->buffer) {
 651                 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
 652                 if (!buf) {
 653                         err = -ENOMEM;
 654                         goto out_unlock;
 655                 }
 656                 memset(buf, 0, bufsize);
 657                 if (dfops->take_irqlock) {
 658                         spin_lock_irq(&dev->wl->irq_lock);
 659                         ret = dfops->read(dev, buf, bufsize);
 660                         spin_unlock_irq(&dev->wl->irq_lock);
 661                 } else
 662                         ret = dfops->read(dev, buf, bufsize);
 663                 if (ret <= 0) {
 664                         free_pages((unsigned long)buf, buforder);
 665                         err = ret;
 666                         goto out_unlock;
 667                 }
 668                 dfile->data_len = ret;
 669                 dfile->buffer = buf;
 670         }
 671
 672         ret = simple_read_from_buffer(userbuf, count, ppos,
 673                                       dfile->buffer,
 674                                       dfile->data_len);
 675         if (*ppos >= dfile->data_len) {
 676                 free_pages((unsigned long)dfile->buffer, buforder);
 677                 dfile->buffer = NULL;
 678                 dfile->data_len = 0;
 679         }
 680 out_unlock:
 681         mutex_unlock(&dev->wl->mutex);
 682
 683         return err ? err : ret;
 684 }
 685
 686 static ssize_t b43_debugfs_write(struct file *file,
 687                                  const char __user *userbuf,
 688                                  size_t count, loff_t *ppos)
 689 {
 690         struct b43_wldev *dev;
 691         struct b43_debugfs_fops *dfops;
 692         char *buf;
 693         int err = 0;
 694
 695         if (!count)
 696                 return 0;
 697         if (count > PAGE_SIZE)
 698                 return -E2BIG;
 699         dev = file->private_data;
 700         if (!dev)
 701                 return -ENODEV;
 702
 703         mutex_lock(&dev->wl->mutex);
 704         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 705                 err = -ENODEV;
 706                 goto out_unlock;
 707         }
 708
 709         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 710         if (!dfops->write) {
 711                 err = -ENOSYS;
 712                 goto out_unlock;
 713         }
 714
 715         buf = (char *)get_zeroed_page(GFP_KERNEL);
 716         if (!buf) {
 717                 err = -ENOMEM;
 718                 goto out_unlock;
 719         }
 720         if (copy_from_user(buf, userbuf, count)) {
 721                 err = -EFAULT;
 722                 goto out_freepage;
 723         }
 724         if (dfops->take_irqlock) {
 725                 spin_lock_irq(&dev->wl->irq_lock);
 726                 err = dfops->write(dev, buf, count);
 727                 spin_unlock_irq(&dev->wl->irq_lock);
 728         } else
 729                 err = dfops->write(dev, buf, count);
 730         if (err)
 731                 goto out_freepage;
 732
 733 out_freepage:
 734         free_page((unsigned long)buf);
 735 out_unlock:
 736         mutex_unlock(&dev->wl->mutex);
 737
 738         return err ? err : count;
 739 }
 740
 741
 742 #define B43_DEBUGFS_FOPS(name, _read, _write, _take_irqlock)    \
 743         static struct b43_debugfs_fops fops_##name = {          \
 744                 .read   = _read,                                \
 745                 .write  = _write,                               \
 746                 .fops   = {                                     \
 747                         .open   = b43_debugfs_open,             \
 748                         .read   = b43_debugfs_read,             \
 749                         .write  = b43_debugfs_write,            \
 750                 },                                              \
 751                 .file_struct_offset = offsetof(struct b43_dfsentry, \
 752                                                file_##name),    \
 753                 .take_irqlock   = _take_irqlock,                \
 754         }
 755
 756 B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file, 1);
 757 B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file, 1);
 758 B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file, 1);
 759 B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file, 1);
 760 B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file, 1);
 761 B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file, 1);
 762 B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file, 1);
 763 B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file, 1);
 764 B43_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
 765 B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
 766 B43_DEBUGFS_FOPS(txpower_g, txpower_g_read_file, txpower_g_write_file, 0);
 767 B43_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
 768 B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL, 0);
 769
 770
 771 int b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
 772 {
 773         return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
 774 }
 775
 776 static void b43_remove_dynamic_debug(struct b43_wldev *dev)
 777 {
 778         struct b43_dfsentry *e = dev->dfsentry;
 779         int i;
 780
 781         for (i = 0; i < __B43_NR_DYNDBG; i++)
 782                 debugfs_remove(e->dyn_debug_dentries[i]);
 783 }
 784
 785 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 786 {
 787         struct b43_dfsentry *e = dev->dfsentry;
 788         struct dentry *d;
 789
 790 #define add_dyn_dbg(name, id, initstate) do {           \
 791         e->dyn_debug[id] = (initstate);                 \
 792         d = debugfs_create_bool(name, 0600, e->subdir,  \
 793                                 &(e->dyn_debug[id]));   \
 794         if (!IS_ERR(d))                                 \
 795                 e->dyn_debug_dentries[id] = d;          \
 796                                 } while (0)
 797
 798         add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
 799         add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
 800         add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
 801         add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
 802         add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
 803         add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
 804         add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, 0);
 805
 806 #undef add_dyn_dbg
 807 }
 808
 809 void b43_debugfs_add_device(struct b43_wldev *dev)
 810 {
 811         struct b43_dfsentry *e;
 812         struct b43_txstatus_log *log;
 813         char devdir[16];
 814
 815         B43_WARN_ON(!dev);
 816         e = kzalloc(sizeof(*e), GFP_KERNEL);
 817         if (!e) {
 818                 b43err(dev->wl, "debugfs: add device OOM\n");
 819                 return;
 820         }
 821         e->dev = dev;
 822         log = &e->txstatlog;
 823         log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
 824                            sizeof(struct b43_txstatus), GFP_KERNEL);
 825         if (!log->log) {
 826                 b43err(dev->wl, "debugfs: add device txstatus OOM\n");
 827                 kfree(e);
 828                 return;
 829         }
 830         log->end = -1;
 831         spin_lock_init(&log->lock);
 832
 833         dev->dfsentry = e;
 834
 835         snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 836         e->subdir = debugfs_create_dir(devdir, rootdir);
 837         if (!e->subdir || IS_ERR(e->subdir)) {
 838                 if (e->subdir == ERR_PTR(-ENODEV)) {
 839                         b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
 840                                "enabled in kernel config\n");
 841                 } else {
 842                         b43err(dev->wl, "debugfs: cannot create %s directory\n",
 843                                devdir);
 844                 }
 845                 dev->dfsentry = NULL;
 846                 kfree(log->log);
 847                 kfree(e);
 848                 return;
 849         }
 850
 851         e->mmio16read_next = 0xFFFF; /* invalid address */
 852         e->mmio32read_next = 0xFFFF; /* invalid address */
 853         e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */
 854         e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */
 855         e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */
 856         e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */
 857
 858 #define ADD_FILE(name, mode)    \
 859         do {                                                    \
 860                 struct dentry *d;                               \
 861                 d = debugfs_create_file(__stringify(name),      \
 862                                         mode, e->subdir, dev,   \
 863                                         &fops_##name.fops);     \
 864                 e->file_##name.dentry = NULL;                   \
 865                 if (!IS_ERR(d))                                 \
 866                         e->file_##name.dentry = d;              \
 867         } while (0)
 868
 869
 870         ADD_FILE(shm16read, 0600);
 871         ADD_FILE(shm16write, 0200);
 872         ADD_FILE(shm32read, 0600);
 873         ADD_FILE(shm32write, 0200);
 874         ADD_FILE(mmio16read, 0600);
 875         ADD_FILE(mmio16write, 0200);
 876         ADD_FILE(mmio32read, 0600);
 877         ADD_FILE(mmio32write, 0200);
 878         ADD_FILE(tsf, 0600);
 879         ADD_FILE(txstat, 0400);
 880         ADD_FILE(txpower_g, 0600);
 881         ADD_FILE(restart, 0200);
 882         ADD_FILE(loctls, 0400);
 883
 884 #undef ADD_FILE
 885
 886         b43_add_dynamic_debug(dev);
 887 }
 888
 889 void b43_debugfs_remove_device(struct b43_wldev *dev)
 890 {
 891         struct b43_dfsentry *e;
 892
 893         if (!dev)
 894                 return;
 895         e = dev->dfsentry;
 896         if (!e)
 897                 return;
 898         b43_remove_dynamic_debug(dev);
 899
 900         debugfs_remove(e->file_shm16read.dentry);
 901         debugfs_remove(e->file_shm16write.dentry);
 902         debugfs_remove(e->file_shm32read.dentry);
 903         debugfs_remove(e->file_shm32write.dentry);
 904         debugfs_remove(e->file_mmio16read.dentry);
 905         debugfs_remove(e->file_mmio16write.dentry);
 906         debugfs_remove(e->file_mmio32read.dentry);
 907         debugfs_remove(e->file_mmio32write.dentry);
 908         debugfs_remove(e->file_tsf.dentry);
 909         debugfs_remove(e->file_txstat.dentry);
 910         debugfs_remove(e->file_txpower_g.dentry);
 911         debugfs_remove(e->file_restart.dentry);
 912         debugfs_remove(e->file_loctls.dentry);
 913
 914         debugfs_remove(e->subdir);
 915         kfree(e->txstatlog.log);
 916         kfree(e);
 917 }
 918
 919 /* Called with IRQs disabled. */
 920 void b43_debugfs_log_txstat(struct b43_wldev *dev,
 921                             const struct b43_txstatus *status)
 922 {
 923         struct b43_dfsentry *e = dev->dfsentry;
 924         struct b43_txstatus_log *log;
 925         struct b43_txstatus *cur;
 926         int i;
 927
 928         if (!e)
 929                 return;
 930         log = &e->txstatlog;
 931         spin_lock(&log->lock); /* IRQs are already disabled. */
 932         i = log->end + 1;
 933         if (i == B43_NR_LOGGED_TXSTATUS)
 934                 i = 0;
 935         log->end = i;
 936         cur = &(log->log[i]);
 937         memcpy(cur, status, sizeof(*cur));
 938         spin_unlock(&log->lock);
 939 }
 940
 941 void b43_debugfs_init(void)
 942 {
 943         rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 944         if (IS_ERR(rootdir))
 945                 rootdir = NULL;
 946 }
 947
 948 void b43_debugfs_exit(void)
 949 {
 950         debugfs_remove(rootdir);
 951 }