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
 271         dev->dfsentry->mmio16read_next = addr;
 272
 273         return 0;
 274 }
 275
 276 static int mmio16write__write_file(struct b43_wldev *dev,
 277                                    const char *buf, size_t count)
 278 {
 279         unsigned int addr, val;
 280         int res;
 281
 282         res = sscanf(buf, "0x%X = 0x%X", &addr, &val);
 283         if (res != 2)
 284                 return -EINVAL;
 285         if (addr > B43_MAX_MMIO_ACCESS)
 286                 return -EADDRNOTAVAIL;
 287         if (val > 0xFFFF)
 288                 return -E2BIG;
 289
 290         b43_write16(dev, addr, val);
 291
 292         return 0;
 293 }
 294
 295 static ssize_t mmio32read__read_file(struct b43_wldev *dev,
 296                                      char *buf, size_t bufsize)
 297 {
 298         ssize_t count = 0;
 299         unsigned int addr;
 300         u32 val;
 301
 302         addr = dev->dfsentry->mmio32read_next;
 303         if (addr > B43_MAX_MMIO_ACCESS)
 304                 return -EDESTADDRREQ;
 305
 306         val = b43_read32(dev, addr);
 307         fappend("0x%08X\n", val);
 308
 309         return count;
 310 }
 311
 312 static int mmio32read__write_file(struct b43_wldev *dev,
 313                                   const char *buf, size_t count)
 314 {
 315         unsigned int addr;
 316         int res;
 317
 318         res = sscanf(buf, "0x%X", &addr);
 319         if (res != 1)
 320                 return -EINVAL;
 321         if (addr > B43_MAX_MMIO_ACCESS)
 322                 return -EADDRNOTAVAIL;
 323
 324         dev->dfsentry->mmio32read_next = addr;
 325
 326         return 0;
 327 }
 328
 329 static int mmio32write__write_file(struct b43_wldev *dev,
 330                                    const char *buf, size_t count)
 331 {
 332         unsigned int addr, val;
 333         int res;
 334
 335         res = sscanf(buf, "0x%X = 0x%X", &addr, &val);
 336         if (res != 2)
 337                 return -EINVAL;
 338         if (addr > B43_MAX_MMIO_ACCESS)
 339                 return -EADDRNOTAVAIL;
 340         if (val > 0xFFFFFFFF)
 341                 return -E2BIG;
 342
 343         b43_write32(dev, addr, val);
 344
 345         return 0;
 346 }
 347
 348 /* wl->irq_lock is locked */
 349 static ssize_t tsf_read_file(struct b43_wldev *dev,
 350                              char *buf, size_t bufsize)
 351 {
 352         ssize_t count = 0;
 353         u64 tsf;
 354
 355         b43_tsf_read(dev, &tsf);
 356         fappend("0x%08x%08x\n",
 357                 (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
 358                 (unsigned int)(tsf & 0xFFFFFFFFULL));
 359
 360         return count;
 361 }
 362
 363 /* wl->irq_lock is locked */
 364 static int tsf_write_file(struct b43_wldev *dev,
 365                           const char *buf, size_t count)
 366 {
 367         u64 tsf;
 368
 369         if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
 370                 return -EINVAL;
 371         b43_tsf_write(dev, tsf);
 372
 373         return 0;
 374 }
 375
 376 /* wl->irq_lock is locked */
 377 static ssize_t ucode_regs_read_file(struct b43_wldev *dev,
 378                                     char *buf, size_t bufsize)
 379 {
 380         ssize_t count = 0;
 381         int i;
 382
 383         for (i = 0; i < 64; i++) {
 384                 fappend("r%d = 0x%04x\n", i,
 385                         b43_shm_read16(dev, B43_SHM_SCRATCH, i));
 386         }
 387
 388         return count;
 389 }
 390
 391 /* wl->irq_lock is locked */
 392 static ssize_t shm_read_file(struct b43_wldev *dev,
 393                              char *buf, size_t bufsize)
 394 {
 395         ssize_t count = 0;
 396         int i;
 397         u16 tmp;
 398         __le16 *le16buf = (__le16 *)buf;
 399
 400         for (i = 0; i < 0x1000; i++) {
 401                 if (bufsize < sizeof(tmp))
 402                         break;
 403                 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
 404                 le16buf[i] = cpu_to_le16(tmp);
 405                 count += sizeof(tmp);
 406                 bufsize -= sizeof(tmp);
 407         }
 408
 409         return count;
 410 }
 411
 412 static ssize_t txstat_read_file(struct b43_wldev *dev,
 413                                 char *buf, size_t bufsize)
 414 {
 415         struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
 416         ssize_t count = 0;
 417         unsigned long flags;
 418         int i, idx;
 419         struct b43_txstatus *stat;
 420
 421         spin_lock_irqsave(&log->lock, flags);
 422         if (log->end < 0) {
 423                 fappend("Nothing transmitted, yet\n");
 424                 goto out_unlock;
 425         }
 426         fappend("b43 TX status reports:\n\n"
 427                 "index | cookie | seq | phy_stat | frame_count | "
 428                 "rts_count | supp_reason | pm_indicated | "
 429                 "intermediate | for_ampdu | acked\n" "---\n");
 430         i = log->end + 1;
 431         idx = 0;
 432         while (1) {
 433                 if (i == B43_NR_LOGGED_TXSTATUS)
 434                         i = 0;
 435                 stat = &(log->log[i]);
 436                 if (stat->cookie) {
 437                         fappend("%03d | "
 438                                 "0x%04X | 0x%04X | 0x%02X | "
 439                                 "0x%X | 0x%X | "
 440                                 "%u | %u | "
 441                                 "%u | %u | %u\n",
 442                                 idx,
 443                                 stat->cookie, stat->seq, stat->phy_stat,
 444                                 stat->frame_count, stat->rts_count,
 445                                 stat->supp_reason, stat->pm_indicated,
 446                                 stat->intermediate, stat->for_ampdu,
 447                                 stat->acked);
 448                         idx++;
 449                 }
 450                 if (i == log->end)
 451                         break;
 452                 i++;
 453         }
 454 out_unlock:
 455         spin_unlock_irqrestore(&log->lock, flags);
 456
 457         return count;
 458 }
 459
 460 static ssize_t txpower_g_read_file(struct b43_wldev *dev,
 461                                    char *buf, size_t bufsize)
 462 {
 463         ssize_t count = 0;
 464
 465         if (dev->phy.type != B43_PHYTYPE_G) {
 466                 fappend("Device is not a G-PHY\n");
 467                 goto out;
 468         }
 469         fappend("Control:               %s\n", dev->phy.manual_txpower_control ?
 470                 "MANUAL" : "AUTOMATIC");
 471         fappend("Baseband attenuation:  %u\n", dev->phy.bbatt.att);
 472         fappend("Radio attenuation:     %u\n", dev->phy.rfatt.att);
 473         fappend("TX Mixer Gain:         %s\n",
 474                 (dev->phy.tx_control & B43_TXCTL_TXMIX) ? "ON" : "OFF");
 475         fappend("PA Gain 2dB:           %s\n",
 476                 (dev->phy.tx_control & B43_TXCTL_PA2DB) ? "ON" : "OFF");
 477         fappend("PA Gain 3dB:           %s\n",
 478                 (dev->phy.tx_control & B43_TXCTL_PA3DB) ? "ON" : "OFF");
 479         fappend("\n\n");
 480         fappend("You can write to this file:\n");
 481         fappend("Writing \"auto\" enables automatic txpower control.\n");
 482         fappend
 483             ("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
 484              "enables manual txpower control.\n");
 485         fappend("Example: 5 4 0 0 1\n");
 486         fappend("Enables manual control with Baseband attenuation 5, "
 487                 "Radio attenuation 4, No TX Mixer Gain, "
 488                 "No PA Gain 2dB, With PA Gain 3dB.\n");
 489 out:
 490         return count;
 491 }
 492
 493 static int txpower_g_write_file(struct b43_wldev *dev,
 494                                 const char *buf, size_t count)
 495 {
 496         if (dev->phy.type != B43_PHYTYPE_G)
 497                 return -ENODEV;
 498         if ((count >= 4) && (memcmp(buf, "auto", 4) == 0)) {
 499                 /* Automatic control */
 500                 dev->phy.manual_txpower_control = 0;
 501                 b43_phy_xmitpower(dev);
 502         } else {
 503                 int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
 504                 /* Manual control */
 505                 if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
 506                            &txmix, &pa2db, &pa3db) != 5)
 507                         return -EINVAL;
 508                 b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
 509                 dev->phy.manual_txpower_control = 1;
 510                 dev->phy.bbatt.att = bbatt;
 511                 dev->phy.rfatt.att = rfatt;
 512                 dev->phy.tx_control = 0;
 513                 if (txmix)
 514                         dev->phy.tx_control |= B43_TXCTL_TXMIX;
 515                 if (pa2db)
 516                         dev->phy.tx_control |= B43_TXCTL_PA2DB;
 517                 if (pa3db)
 518                         dev->phy.tx_control |= B43_TXCTL_PA3DB;
 519                 b43_phy_lock(dev);
 520                 b43_radio_lock(dev);
 521                 b43_set_txpower_g(dev, &dev->phy.bbatt,
 522                                   &dev->phy.rfatt, dev->phy.tx_control);
 523                 b43_radio_unlock(dev);
 524                 b43_phy_unlock(dev);
 525         }
 526
 527         return 0;
 528 }
 529
 530 /* wl->irq_lock is locked */
 531 static int restart_write_file(struct b43_wldev *dev,
 532                               const char *buf, size_t count)
 533 {
 534         int err = 0;
 535
 536         if (count > 0 && buf[0] == '1') {
 537                 b43_controller_restart(dev, "manually restarted");
 538         } else
 539                 err = -EINVAL;
 540
 541         return err;
 542 }
 543
 544 static unsigned long calc_expire_secs(unsigned long now,
 545                                       unsigned long time,
 546                                       unsigned long expire)
 547 {
 548         expire = time + expire;
 549
 550         if (time_after(now, expire))
 551                 return 0; /* expired */
 552         if (expire < now) {
 553                 /* jiffies wrapped */
 554                 expire -= MAX_JIFFY_OFFSET;
 555                 now -= MAX_JIFFY_OFFSET;
 556         }
 557         B43_WARN_ON(expire < now);
 558
 559         return (expire - now) / HZ;
 560 }
 561
 562 static ssize_t loctls_read_file(struct b43_wldev *dev,
 563                                 char *buf, size_t bufsize)
 564 {
 565         ssize_t count = 0;
 566         struct b43_txpower_lo_control *lo;
 567         int i, err = 0;
 568         struct b43_lo_calib *cal;
 569         unsigned long now = jiffies;
 570         struct b43_phy *phy = &dev->phy;
 571
 572         if (phy->type != B43_PHYTYPE_G) {
 573                 fappend("Device is not a G-PHY\n");
 574                 err = -ENODEV;
 575                 goto out;
 576         }
 577         lo = phy->lo_control;
 578         fappend("-- Local Oscillator calibration data --\n\n");
 579         fappend("HW-power-control enabled: %d\n",
 580                 dev->phy.hardware_power_control);
 581         fappend("TX Bias: 0x%02X,  TX Magn: 0x%02X  (expire in %lu sec)\n",
 582                 lo->tx_bias, lo->tx_magn,
 583                 calc_expire_secs(now, lo->txctl_measured_time,
 584                                  B43_LO_TXCTL_EXPIRE));
 585         fappend("Power Vector: 0x%08X%08X  (expires in %lu sec)\n",
 586                 (unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
 587                 (unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
 588                 calc_expire_secs(now, lo->pwr_vec_read_time,
 589                                  B43_LO_PWRVEC_EXPIRE));
 590
 591         fappend("\nCalibrated settings:\n");
 592         list_for_each_entry(cal, &lo->calib_list, list) {
 593                 bool active;
 594
 595                 active = (b43_compare_bbatt(&cal->bbatt, &phy->bbatt) &&
 596                           b43_compare_rfatt(&cal->rfatt, &phy->rfatt));
 597                 fappend("BB(%d), RF(%d,%d)  ->  I=%d, Q=%d  "
 598                         "(expires in %lu sec)%s\n",
 599                         cal->bbatt.att,
 600                         cal->rfatt.att, cal->rfatt.with_padmix,
 601                         cal->ctl.i, cal->ctl.q,
 602                         calc_expire_secs(now, cal->calib_time,
 603                                          B43_LO_CALIB_EXPIRE),
 604                         active ? "  ACTIVE" : "");
 605         }
 606
 607         fappend("\nUsed RF attenuation values:  Value(WithPadmix flag)\n");
 608         for (i = 0; i < lo->rfatt_list.len; i++) {
 609                 fappend("%u(%d), ",
 610                         lo->rfatt_list.list[i].att,
 611                         lo->rfatt_list.list[i].with_padmix);
 612         }
 613         fappend("\n");
 614         fappend("\nUsed Baseband attenuation values:\n");
 615         for (i = 0; i < lo->bbatt_list.len; i++) {
 616                 fappend("%u, ",
 617                         lo->bbatt_list.list[i].att);
 618         }
 619         fappend("\n");
 620
 621 out:
 622         return err ? err : count;
 623 }
 624
 625 #undef fappend
 626
 627 static int b43_debugfs_open(struct inode *inode, struct file *file)
 628 {
 629         file->private_data = inode->i_private;
 630         return 0;
 631 }
 632
 633 static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
 634                                 size_t count, loff_t *ppos)
 635 {
 636         struct b43_wldev *dev;
 637         struct b43_debugfs_fops *dfops;
 638         struct b43_dfs_file *dfile;
 639         ssize_t uninitialized_var(ret);
 640         char *buf;
 641         const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
 642         const size_t buforder = get_order(bufsize);
 643         int err = 0;
 644
 645         if (!count)
 646                 return 0;
 647         dev = file->private_data;
 648         if (!dev)
 649                 return -ENODEV;
 650
 651         mutex_lock(&dev->wl->mutex);
 652         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 653                 err = -ENODEV;
 654                 goto out_unlock;
 655         }
 656
 657         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 658         if (!dfops->read) {
 659                 err = -ENOSYS;
 660                 goto out_unlock;
 661         }
 662         dfile = fops_to_dfs_file(dev, dfops);
 663
 664         if (!dfile->buffer) {
 665                 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
 666                 if (!buf) {
 667                         err = -ENOMEM;
 668                         goto out_unlock;
 669                 }
 670                 memset(buf, 0, bufsize);
 671                 if (dfops->take_irqlock) {
 672                         spin_lock_irq(&dev->wl->irq_lock);
 673                         ret = dfops->read(dev, buf, bufsize);
 674                         spin_unlock_irq(&dev->wl->irq_lock);
 675                 } else
 676                         ret = dfops->read(dev, buf, bufsize);
 677                 if (ret <= 0) {
 678                         free_pages((unsigned long)buf, buforder);
 679                         err = ret;
 680                         goto out_unlock;
 681                 }
 682                 dfile->data_len = ret;
 683                 dfile->buffer = buf;
 684         }
 685
 686         ret = simple_read_from_buffer(userbuf, count, ppos,
 687                                       dfile->buffer,
 688                                       dfile->data_len);
 689         if (*ppos >= dfile->data_len) {
 690                 free_pages((unsigned long)dfile->buffer, buforder);
 691                 dfile->buffer = NULL;
 692                 dfile->data_len = 0;
 693         }
 694 out_unlock:
 695         mutex_unlock(&dev->wl->mutex);
 696
 697         return err ? err : ret;
 698 }
 699
 700 static ssize_t b43_debugfs_write(struct file *file,
 701                                  const char __user *userbuf,
 702                                  size_t count, loff_t *ppos)
 703 {
 704         struct b43_wldev *dev;
 705         struct b43_debugfs_fops *dfops;
 706         char *buf;
 707         int err = 0;
 708
 709         if (!count)
 710                 return 0;
 711         if (count > PAGE_SIZE)
 712                 return -E2BIG;
 713         dev = file->private_data;
 714         if (!dev)
 715                 return -ENODEV;
 716
 717         mutex_lock(&dev->wl->mutex);
 718         if (b43_status(dev) < B43_STAT_INITIALIZED) {
 719                 err = -ENODEV;
 720                 goto out_unlock;
 721         }
 722
 723         dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 724         if (!dfops->write) {
 725                 err = -ENOSYS;
 726                 goto out_unlock;
 727         }
 728
 729         buf = (char *)get_zeroed_page(GFP_KERNEL);
 730         if (!buf) {
 731                 err = -ENOMEM;
 732                 goto out_unlock;
 733         }
 734         if (copy_from_user(buf, userbuf, count)) {
 735                 err = -EFAULT;
 736                 goto out_freepage;
 737         }
 738         if (dfops->take_irqlock) {
 739                 spin_lock_irq(&dev->wl->irq_lock);
 740                 err = dfops->write(dev, buf, count);
 741                 spin_unlock_irq(&dev->wl->irq_lock);
 742         } else
 743                 err = dfops->write(dev, buf, count);
 744         if (err)
 745                 goto out_freepage;
 746
 747 out_freepage:
 748         free_page((unsigned long)buf);
 749 out_unlock:
 750         mutex_unlock(&dev->wl->mutex);
 751
 752         return err ? err : count;
 753 }
 754
 755
 756 #define B43_DEBUGFS_FOPS(name, _read, _write, _take_irqlock)    \
 757         static struct b43_debugfs_fops fops_##name = {          \
 758                 .read   = _read,                                \
 759                 .write  = _write,                               \
 760                 .fops   = {                                     \
 761                         .open   = b43_debugfs_open,             \
 762                         .read   = b43_debugfs_read,             \
 763                         .write  = b43_debugfs_write,            \
 764                 },                                              \
 765                 .file_struct_offset = offsetof(struct b43_dfsentry, \
 766                                                file_##name),    \
 767                 .take_irqlock   = _take_irqlock,                \
 768         }
 769
 770 B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file, 1);
 771 B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file, 1);
 772 B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file, 1);
 773 B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file, 1);
 774 B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file, 1);
 775 B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file, 1);
 776 B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file, 1);
 777 B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file, 1);
 778 B43_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
 779 B43_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
 780 B43_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
 781 B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
 782 B43_DEBUGFS_FOPS(txpower_g, txpower_g_read_file, txpower_g_write_file, 0);
 783 B43_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
 784 B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL, 0);
 785
 786
 787 int b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
 788 {
 789         return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
 790 }
 791
 792 static void b43_remove_dynamic_debug(struct b43_wldev *dev)
 793 {
 794         struct b43_dfsentry *e = dev->dfsentry;
 795         int i;
 796
 797         for (i = 0; i < __B43_NR_DYNDBG; i++)
 798                 debugfs_remove(e->dyn_debug_dentries[i]);
 799 }
 800
 801 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 802 {
 803         struct b43_dfsentry *e = dev->dfsentry;
 804         struct dentry *d;
 805
 806 #define add_dyn_dbg(name, id, initstate) do {           \
 807         e->dyn_debug[id] = (initstate);                 \
 808         d = debugfs_create_bool(name, 0600, e->subdir,  \
 809                                 &(e->dyn_debug[id]));   \
 810         if (!IS_ERR(d))                                 \
 811                 e->dyn_debug_dentries[id] = d;          \
 812                                 } while (0)
 813
 814         add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
 815         add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
 816         add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
 817         add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
 818         add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
 819         add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
 820
 821 #undef add_dyn_dbg
 822 }
 823
 824 void b43_debugfs_add_device(struct b43_wldev *dev)
 825 {
 826         struct b43_dfsentry *e;
 827         struct b43_txstatus_log *log;
 828         char devdir[16];
 829
 830         B43_WARN_ON(!dev);
 831         e = kzalloc(sizeof(*e), GFP_KERNEL);
 832         if (!e) {
 833                 b43err(dev->wl, "debugfs: add device OOM\n");
 834                 return;
 835         }
 836         e->dev = dev;
 837         log = &e->txstatlog;
 838         log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
 839                            sizeof(struct b43_txstatus), GFP_KERNEL);
 840         if (!log->log) {
 841                 b43err(dev->wl, "debugfs: add device txstatus OOM\n");
 842                 kfree(e);
 843                 return;
 844         }
 845         log->end = -1;
 846         spin_lock_init(&log->lock);
 847
 848         dev->dfsentry = e;
 849
 850         snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 851         e->subdir = debugfs_create_dir(devdir, rootdir);
 852         if (!e->subdir || IS_ERR(e->subdir)) {
 853                 if (e->subdir == ERR_PTR(-ENODEV)) {
 854                         b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
 855                                "enabled in kernel config\n");
 856                 } else {
 857                         b43err(dev->wl, "debugfs: cannot create %s directory\n",
 858                                devdir);
 859                 }
 860                 dev->dfsentry = NULL;
 861                 kfree(log->log);
 862                 kfree(e);
 863                 return;
 864         }
 865
 866         e->mmio16read_next = 0xFFFF; /* invalid address */
 867         e->mmio32read_next = 0xFFFF; /* invalid address */
 868         e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */
 869         e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */
 870         e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */
 871         e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */
 872
 873 #define ADD_FILE(name, mode)    \
 874         do {                                                    \
 875                 struct dentry *d;                               \
 876                 d = debugfs_create_file(__stringify(name),      \
 877                                         mode, e->subdir, dev,   \
 878                                         &fops_##name.fops);     \
 879                 e->file_##name.dentry = NULL;                   \
 880                 if (!IS_ERR(d))                                 \
 881                         e->file_##name.dentry = d;              \
 882         } while (0)
 883
 884
 885         ADD_FILE(shm16read, 0600);
 886         ADD_FILE(shm16write, 0200);
 887         ADD_FILE(shm32read, 0600);
 888         ADD_FILE(shm32write, 0200);
 889         ADD_FILE(mmio16read, 0600);
 890         ADD_FILE(mmio16write, 0200);
 891         ADD_FILE(mmio32read, 0600);
 892         ADD_FILE(mmio32write, 0200);
 893         ADD_FILE(tsf, 0600);
 894         ADD_FILE(ucode_regs, 0400);
 895         ADD_FILE(shm, 0400);
 896         ADD_FILE(txstat, 0400);
 897         ADD_FILE(txpower_g, 0600);
 898         ADD_FILE(restart, 0200);
 899         ADD_FILE(loctls, 0400);
 900
 901 #undef ADD_FILE
 902
 903         b43_add_dynamic_debug(dev);
 904 }
 905
 906 void b43_debugfs_remove_device(struct b43_wldev *dev)
 907 {
 908         struct b43_dfsentry *e;
 909
 910         if (!dev)
 911                 return;
 912         e = dev->dfsentry;
 913         if (!e)
 914                 return;
 915         b43_remove_dynamic_debug(dev);
 916
 917         debugfs_remove(e->file_shm16read.dentry);
 918         debugfs_remove(e->file_shm16write.dentry);
 919         debugfs_remove(e->file_shm32read.dentry);
 920         debugfs_remove(e->file_shm32write.dentry);
 921         debugfs_remove(e->file_mmio16read.dentry);
 922         debugfs_remove(e->file_mmio16write.dentry);
 923         debugfs_remove(e->file_mmio32read.dentry);
 924         debugfs_remove(e->file_mmio32write.dentry);
 925         debugfs_remove(e->file_tsf.dentry);
 926         debugfs_remove(e->file_ucode_regs.dentry);
 927         debugfs_remove(e->file_shm.dentry);
 928         debugfs_remove(e->file_txstat.dentry);
 929         debugfs_remove(e->file_txpower_g.dentry);
 930         debugfs_remove(e->file_restart.dentry);
 931         debugfs_remove(e->file_loctls.dentry);
 932
 933         debugfs_remove(e->subdir);
 934         kfree(e->txstatlog.log);
 935         kfree(e);
 936 }
 937
 938 /* Called with IRQs disabled. */
 939 void b43_debugfs_log_txstat(struct b43_wldev *dev,
 940                             const struct b43_txstatus *status)
 941 {
 942         struct b43_dfsentry *e = dev->dfsentry;
 943         struct b43_txstatus_log *log;
 944         struct b43_txstatus *cur;
 945         int i;
 946
 947         if (!e)
 948                 return;
 949         log = &e->txstatlog;
 950         spin_lock(&log->lock); /* IRQs are already disabled. */
 951         i = log->end + 1;
 952         if (i == B43_NR_LOGGED_TXSTATUS)
 953                 i = 0;
 954         log->end = i;
 955         cur = &(log->log[i]);
 956         memcpy(cur, status, sizeof(*cur));
 957         spin_unlock(&log->lock);
 958 }
 959
 960 void b43_debugfs_init(void)
 961 {
 962         rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 963         if (IS_ERR(rootdir))
 964                 rootdir = NULL;
 965 }
 966
 967 void b43_debugfs_exit(void)
 968 {
 969         debugfs_remove(rootdir);
 970 }