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 static ssize_t txstat_read_file(struct b43_wldev *dev,
 371                                 char *buf, size_t bufsize)
 372 {
 373         struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
 374         ssize_t count = 0;
 375         unsigned long flags;
 376         int i, idx;
 377         struct b43_txstatus *stat;
 378
 379         spin_lock_irqsave(&log->lock, flags);
 380         if (log->end < 0) {
 381                 fappend("Nothing transmitted, yet\n");
 382                 goto out_unlock;
 383         }
 384         fappend("b43 TX status reports:\n\n"
 385                 "index | cookie | seq | phy_stat | frame_count | "
 386                 "rts_count | supp_reason | pm_indicated | "
 387                 "intermediate | for_ampdu | acked\n" "---\n");
 388         i = log->end + 1;
 389         idx = 0;
 390         while (1) {
 391                 if (i == B43_NR_LOGGED_TXSTATUS)
 392                         i = 0;
 393                 stat = &(log->log[i]);
 394                 if (stat->cookie) {
 395                         fappend("%03d | "
 396                                 "0x%04X | 0x%04X | 0x%02X | "
 397                                 "0x%X | 0x%X | "
 398                                 "%u | %u | "
 399                                 "%u | %u | %u\n",
 400                                 idx,
 401                                 stat->cookie, stat->seq, stat->phy_stat,
 402                                 stat->frame_count, stat->rts_count,
 403                                 stat->supp_reason, stat->pm_indicated,
 404                                 stat->intermediate, stat->for_ampdu,
 405                                 stat->acked);
 406                         idx++;
 407                 }
 408                 if (i == log->end)
 409                         break;
 410                 i++;
 411         }
 412 out_unlock:
 413         spin_unlock_irqrestore(&log->lock, flags);
 414
 415         return count;
 416 }
 417
 418 /* wl->irq_lock is locked */
 419 static int restart_write_file(struct b43_wldev *dev,
 420                               const char *buf, size_t count)
 421 {
 422         int err = 0;
 423
 424         if (count > 0 && buf[0] == '1') {
 425                 b43_controller_restart(dev, "manually restarted");
 426         } else
 427                 err = -EINVAL;
 428
 429         return err;
 430 }
 431
 432 static unsigned long calc_expire_secs(unsigned long now,
 433                                       unsigned long time,
 434                                       unsigned long expire)
 435 {
 436         expire = time + expire;
 437
 438         if (time_after(now, expire))
 439                 return 0; /* expired */
 440         if (expire < now) {
 441                 /* jiffies wrapped */
 442                 expire -= MAX_JIFFY_OFFSET;
 443                 now -= MAX_JIFFY_OFFSET;
 444         }
 445         B43_WARN_ON(expire < now);
 446
 447         return (expire - now) / HZ;
 448 }
 449
 450 static ssize_t loctls_read_file(struct b43_wldev *dev,
 451                                 char *buf, size_t bufsize)
 452 {
 453         ssize_t count = 0;
 454         struct b43_txpower_lo_control *lo;
 455         int i, err = 0;
 456         struct b43_lo_calib *cal;
 457         unsigned long now = jiffies;
 458         struct b43_phy *phy = &dev->phy;
 459
 460         if (phy->type != B43_PHYTYPE_G) {
 461                 fappend("Device is not a G-PHY\n");
 462                 err = -ENODEV;
 463                 goto out;
 464         }
 465         lo = phy->g->lo_control;
 466         fappend("-- Local Oscillator calibration data --\n\n");
 467         fappend("HW-power-control enabled: %d\n",
 468                 dev->phy.hardware_power_control);
 469         fappend("TX Bias: 0x%02X,  TX Magn: 0x%02X  (expire in %lu sec)\n",
 470                 lo->tx_bias, lo->tx_magn,
 471                 calc_expire_secs(now, lo->txctl_measured_time,
 472                                  B43_LO_TXCTL_EXPIRE));
 473         fappend("Power Vector: 0x%08X%08X  (expires in %lu sec)\n",
 474                 (unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
 475                 (unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
 476                 calc_expire_secs(now, lo->pwr_vec_read_time,
 477                                  B43_LO_PWRVEC_EXPIRE));
 478
 479         fappend("\nCalibrated settings:\n");
 480         list_for_each_entry(cal, &lo->calib_list, list) {
 481                 bool active;
 482
 483                 active = (b43_compare_bbatt(&cal->bbatt, &phy->g->bbatt) &&
 484                           b43_compare_rfatt(&cal->rfatt, &phy->g->rfatt));
 485                 fappend("BB(%d), RF(%d,%d)  ->  I=%d, Q=%d  "
 486                         "(expires in %lu sec)%s\n",
 487                         cal->bbatt.att,
 488                         cal->rfatt.att, cal->rfatt.with_padmix,
 489                         cal->ctl.i, cal->ctl.q,
 490                         calc_expire_secs(now, cal->calib_time,
 491                                          B43_LO_CALIB_EXPIRE),
 492                         active ? "  ACTIVE" : "");
 493         }
 494
 495         fappend("\nUsed RF attenuation values:  Value(WithPadmix flag)\n");
 496         for (i = 0; i < lo->rfatt_list.len; i++) {
 497                 fappend("%u(%d), ",
 498                         lo->rfatt_list.list[i].att,
 499                         lo->rfatt_list.list[i].with_padmix);
 500         }
 501         fappend("\n");
 502         fappend("\nUsed Baseband attenuation values:\n");
 503         for (i = 0; i < lo->bbatt_list.len; i++) {
 504                 fappend("%u, ",
 505                         lo->bbatt_list.list[i].att);
 506         }
 507         fappend("\n");
 508
 509 out:
 510         return err ? err : count;
 511 }
 512
 513 #undef fappend
 514
 515 static int b43_debugfs_open(struct inode *inode, struct file *file)
 516 {
 517         file->private_data = inode->i_private;
 518         return 0;
 519 }
 520
 521 static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
 522                                 size_t count, loff_t *ppos)
 523 {
 524         struct b43_wldev *dev;
 525         struct b43_debugfs_fops *dfops;
 526         struct b43_dfs_file *dfile;
 527         ssize_t uninitialized_var(ret);
 528         char *buf;
 529         const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
 530         const size_t buforder = get_order(bufsize);
 531         int err = 0;
 532
 533         if (!count)
 534                 return 0;
 535         dev = file->private_data;
 536         if (!dev)
 537                 return -ENODEV;
 538
 539         mutex_lock(&dev->wl->mutex);
 540         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 541                 err = -ENODEV;
 542                 goto out_unlock;
 543         }
 544
 545         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 546         if (!dfops->read) {
 547                 err = -ENOSYS;
 548                 goto out_unlock;
 549         }
 550         dfile = fops_to_dfs_file(dev, dfops);
 551
 552         if (!dfile->buffer) {
 553                 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
 554                 if (!buf) {
 555                         err = -ENOMEM;
 556                         goto out_unlock;
 557                 }
 558                 memset(buf, 0, bufsize);
 559                 if (dfops->take_irqlock) {
 560                         spin_lock_irq(&dev->wl->irq_lock);
 561                         ret = dfops->read(dev, buf, bufsize);
 562                         spin_unlock_irq(&dev->wl->irq_lock);
 563                 } else
 564                         ret = dfops->read(dev, buf, bufsize);
 565                 if (ret <= 0) {
 566                         free_pages((unsigned long)buf, buforder);
 567                         err = ret;
 568                         goto out_unlock;
 569                 }
 570                 dfile->data_len = ret;
 571                 dfile->buffer = buf;
 572         }
 573
 574         ret = simple_read_from_buffer(userbuf, count, ppos,
 575                                       dfile->buffer,
 576                                       dfile->data_len);
 577         if (*ppos >= dfile->data_len) {
 578                 free_pages((unsigned long)dfile->buffer, buforder);
 579                 dfile->buffer = NULL;
 580                 dfile->data_len = 0;
 581         }
 582 out_unlock:
 583         mutex_unlock(&dev->wl->mutex);
 584
 585         return err ? err : ret;
 586 }
 587
 588 static ssize_t b43_debugfs_write(struct file *file,
 589                                  const char __user *userbuf,
 590                                  size_t count, loff_t *ppos)
 591 {
 592         struct b43_wldev *dev;
 593         struct b43_debugfs_fops *dfops;
 594         char *buf;
 595         int err = 0;
 596
 597         if (!count)
 598                 return 0;
 599         if (count > PAGE_SIZE)
 600                 return -E2BIG;
 601         dev = file->private_data;
 602         if (!dev)
 603                 return -ENODEV;
 604
 605         mutex_lock(&dev->wl->mutex);
 606         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 607                 err = -ENODEV;
 608                 goto out_unlock;
 609         }
 610
 611         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 612         if (!dfops->write) {
 613                 err = -ENOSYS;
 614                 goto out_unlock;
 615         }
 616
 617         buf = (char *)get_zeroed_page(GFP_KERNEL);
 618         if (!buf) {
 619                 err = -ENOMEM;
 620                 goto out_unlock;
 621         }
 622         if (copy_from_user(buf, userbuf, count)) {
 623                 err = -EFAULT;
 624                 goto out_freepage;
 625         }
 626         if (dfops->take_irqlock) {
 627                 spin_lock_irq(&dev->wl->irq_lock);
 628                 err = dfops->write(dev, buf, count);
 629                 spin_unlock_irq(&dev->wl->irq_lock);
 630         } else
 631                 err = dfops->write(dev, buf, count);
 632         if (err)
 633                 goto out_freepage;
 634
 635 out_freepage:
 636         free_page((unsigned long)buf);
 637 out_unlock:
 638         mutex_unlock(&dev->wl->mutex);
 639
 640         return err ? err : count;
 641 }
 642
 643
 644 #define B43_DEBUGFS_FOPS(name, _read, _write, _take_irqlock)    \
 645         static struct b43_debugfs_fops fops_##name = {          \
 646                 .read   = _read,                                \
 647                 .write  = _write,                               \
 648                 .fops   = {                                     \
 649                         .open   = b43_debugfs_open,             \
 650                         .read   = b43_debugfs_read,             \
 651                         .write  = b43_debugfs_write,            \
 652                 },                                              \
 653                 .file_struct_offset = offsetof(struct b43_dfsentry, \
 654                                                file_##name),    \
 655                 .take_irqlock   = _take_irqlock,                \
 656         }
 657
 658 B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file, 1);
 659 B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file, 1);
 660 B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file, 1);
 661 B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file, 1);
 662 B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file, 1);
 663 B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file, 1);
 664 B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file, 1);
 665 B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file, 1);
 666 B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
 667 B43_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
 668 B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL, 0);
 669
 670
 671 bool b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
 672 {
 673         bool enabled;
 674
 675         enabled = (dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
 676         if (unlikely(enabled)) {
 677                 /* Force full debugging messages, if the user enabled
 678                  * some dynamic debugging feature. */
 679                 b43_modparam_verbose = B43_VERBOSITY_MAX;
 680         }
 681
 682         return enabled;
 683 }
 684
 685 static void b43_remove_dynamic_debug(struct b43_wldev *dev)
 686 {
 687         struct b43_dfsentry *e = dev->dfsentry;
 688         int i;
 689
 690         for (i = 0; i < __B43_NR_DYNDBG; i++)
 691                 debugfs_remove(e->dyn_debug_dentries[i]);
 692 }
 693
 694 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 695 {
 696         struct b43_dfsentry *e = dev->dfsentry;
 697         struct dentry *d;
 698
 699 #define add_dyn_dbg(name, id, initstate) do {           \
 700         e->dyn_debug[id] = (initstate);                 \
 701         d = debugfs_create_bool(name, 0600, e->subdir,  \
 702                                 &(e->dyn_debug[id]));   \
 703         if (!IS_ERR(d))                                 \
 704                 e->dyn_debug_dentries[id] = d;          \
 705                                 } while (0)
 706
 707         add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
 708         add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
 709         add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
 710         add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
 711         add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
 712         add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
 713         add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, 0);
 714         add_dyn_dbg("debug_keys", B43_DBG_KEYS, 0);
 715
 716 #undef add_dyn_dbg
 717 }
 718
 719 void b43_debugfs_add_device(struct b43_wldev *dev)
 720 {
 721         struct b43_dfsentry *e;
 722         struct b43_txstatus_log *log;
 723         char devdir[16];
 724
 725         B43_WARN_ON(!dev);
 726         e = kzalloc(sizeof(*e), GFP_KERNEL);
 727         if (!e) {
 728                 b43err(dev->wl, "debugfs: add device OOM\n");
 729                 return;
 730         }
 731         e->dev = dev;
 732         log = &e->txstatlog;
 733         log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
 734                            sizeof(struct b43_txstatus), GFP_KERNEL);
 735         if (!log->log) {
 736                 b43err(dev->wl, "debugfs: add device txstatus OOM\n");
 737                 kfree(e);
 738                 return;
 739         }
 740         log->end = -1;
 741         spin_lock_init(&log->lock);
 742
 743         dev->dfsentry = e;
 744
 745         snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 746         e->subdir = debugfs_create_dir(devdir, rootdir);
 747         if (!e->subdir || IS_ERR(e->subdir)) {
 748                 if (e->subdir == ERR_PTR(-ENODEV)) {
 749                         b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
 750                                "enabled in kernel config\n");
 751                 } else {
 752                         b43err(dev->wl, "debugfs: cannot create %s directory\n",
 753                                devdir);
 754                 }
 755                 dev->dfsentry = NULL;
 756                 kfree(log->log);
 757                 kfree(e);
 758                 return;
 759         }
 760
 761         e->mmio16read_next = 0xFFFF; /* invalid address */
 762         e->mmio32read_next = 0xFFFF; /* invalid address */
 763         e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */
 764         e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */
 765         e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */
 766         e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */
 767
 768 #define ADD_FILE(name, mode)    \
 769         do {                                                    \
 770                 struct dentry *d;                               \
 771                 d = debugfs_create_file(__stringify(name),      \
 772                                         mode, e->subdir, dev,   \
 773                                         &fops_##name.fops);     \
 774                 e->file_##name.dentry = NULL;                   \
 775                 if (!IS_ERR(d))                                 \
 776                         e->file_##name.dentry = d;              \
 777         } while (0)
 778
 779
 780         ADD_FILE(shm16read, 0600);
 781         ADD_FILE(shm16write, 0200);
 782         ADD_FILE(shm32read, 0600);
 783         ADD_FILE(shm32write, 0200);
 784         ADD_FILE(mmio16read, 0600);
 785         ADD_FILE(mmio16write, 0200);
 786         ADD_FILE(mmio32read, 0600);
 787         ADD_FILE(mmio32write, 0200);
 788         ADD_FILE(txstat, 0400);
 789         ADD_FILE(restart, 0200);
 790         ADD_FILE(loctls, 0400);
 791
 792 #undef ADD_FILE
 793
 794         b43_add_dynamic_debug(dev);
 795 }
 796
 797 void b43_debugfs_remove_device(struct b43_wldev *dev)
 798 {
 799         struct b43_dfsentry *e;
 800
 801         if (!dev)
 802                 return;
 803         e = dev->dfsentry;
 804         if (!e)
 805                 return;
 806         b43_remove_dynamic_debug(dev);
 807
 808         debugfs_remove(e->file_shm16read.dentry);
 809         debugfs_remove(e->file_shm16write.dentry);
 810         debugfs_remove(e->file_shm32read.dentry);
 811         debugfs_remove(e->file_shm32write.dentry);
 812         debugfs_remove(e->file_mmio16read.dentry);
 813         debugfs_remove(e->file_mmio16write.dentry);
 814         debugfs_remove(e->file_mmio32read.dentry);
 815         debugfs_remove(e->file_mmio32write.dentry);
 816         debugfs_remove(e->file_txstat.dentry);
 817         debugfs_remove(e->file_restart.dentry);
 818         debugfs_remove(e->file_loctls.dentry);
 819
 820         debugfs_remove(e->subdir);
 821         kfree(e->txstatlog.log);
 822         kfree(e);
 823 }
 824
 825 /* Called with IRQs disabled. */
 826 void b43_debugfs_log_txstat(struct b43_wldev *dev,
 827                             const struct b43_txstatus *status)
 828 {
 829         struct b43_dfsentry *e = dev->dfsentry;
 830         struct b43_txstatus_log *log;
 831         struct b43_txstatus *cur;
 832         int i;
 833
 834         if (!e)
 835                 return;
 836         log = &e->txstatlog;
 837         spin_lock(&log->lock); /* IRQs are already disabled. */
 838         i = log->end + 1;
 839         if (i == B43_NR_LOGGED_TXSTATUS)
 840                 i = 0;
 841         log->end = i;
 842         cur = &(log->log[i]);
 843         memcpy(cur, status, sizeof(*cur));
 844         spin_unlock(&log->lock);
 845 }
 846
 847 void b43_debugfs_init(void)
 848 {
 849         rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 850         if (IS_ERR(rootdir))
 851                 rootdir = NULL;
 852 }
 853
 854 void b43_debugfs_exit(void)
 855 {
 856         debugfs_remove(rootdir);
 857 }