drivers/net/wireless/iwmc3200wifi/debugfs.c

   1 /*
   2  * Intel Wireless Multicomm 3200 WiFi driver
   3  *
   4  * Copyright (C) 2009 Intel Corporation <ilw@linux.intel.com>
   5  * Samuel Ortiz <samuel.ortiz@intel.com>
   6  * Zhu Yi <yi.zhu@intel.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License version
  10  * 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20  * 02110-1301, USA.
  21  *
  22  */
  23
  24 #include <linux/slab.h>
  25 #include <linux/kernel.h>
  26 #include <linux/bitops.h>
  27 #include <linux/debugfs.h>
  28 #include <linux/export.h>
  29
  30 #include "iwm.h"
  31 #include "bus.h"
  32 #include "rx.h"
  33 #include "debug.h"
  34
  35 static struct {
  36         u8 id;
  37         char *name;
  38 } iwm_debug_module[__IWM_DM_NR] = {
  39          {IWM_DM_BOOT, "boot"},
  40          {IWM_DM_FW,   "fw"},
  41          {IWM_DM_SDIO, "sdio"},
  42          {IWM_DM_NTF,  "ntf"},
  43          {IWM_DM_RX,   "rx"},
  44          {IWM_DM_TX,   "tx"},
  45          {IWM_DM_MLME, "mlme"},
  46          {IWM_DM_CMD,  "cmd"},
  47          {IWM_DM_WEXT,  "wext"},
  48 };
  49
  50 #define add_dbg_module(dbg, name, id, initlevel)        \
  51 do {                                                    \
  52         dbg.dbg_module[id] = (initlevel);               \
  53         dbg.dbg_module_dentries[id] =                   \
  54                 debugfs_create_x8(name, 0600,           \
  55                                 dbg.dbgdir,             \
  56                                 &(dbg.dbg_module[id])); \
  57 } while (0)
  58
  59 static int iwm_debugfs_u32_read(void *data, u64 *val)
  60 {
  61         struct iwm_priv *iwm = data;
  62
  63         *val = iwm->dbg.dbg_level;
  64         return 0;
  65 }
  66
  67 static int iwm_debugfs_dbg_level_write(void *data, u64 val)
  68 {
  69         struct iwm_priv *iwm = data;
  70         int i;
  71
  72         iwm->dbg.dbg_level = val;
  73
  74         for (i = 0; i < __IWM_DM_NR; i++)
  75                 iwm->dbg.dbg_module[i] = val;
  76
  77         return 0;
  78 }
  79 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_level,
  80                         iwm_debugfs_u32_read, iwm_debugfs_dbg_level_write,
  81                         "%llu\n");
  82
  83 static int iwm_debugfs_dbg_modules_write(void *data, u64 val)
  84 {
  85         struct iwm_priv *iwm = data;
  86         int i, bit;
  87
  88         iwm->dbg.dbg_modules = val;
  89
  90         for (i = 0; i < __IWM_DM_NR; i++)
  91                 iwm->dbg.dbg_module[i] = 0;
  92
  93         for_each_set_bit(bit, &iwm->dbg.dbg_modules, __IWM_DM_NR)
  94                 iwm->dbg.dbg_module[bit] = iwm->dbg.dbg_level;
  95
  96         return 0;
  97 }
  98 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_modules,
  99                         iwm_debugfs_u32_read, iwm_debugfs_dbg_modules_write,
 100                         "%llu\n");
 101
 102
 103 static ssize_t iwm_debugfs_txq_read(struct file *filp, char __user *buffer,
 104                                    size_t count, loff_t *ppos)
 105 {
 106         struct iwm_priv *iwm = filp->private_data;
 107         char *buf;
 108         int i, buf_len = 4096;
 109         size_t len = 0;
 110         ssize_t ret;
 111
 112         if (*ppos != 0)
 113                 return 0;
 114         if (count < sizeof(buf))
 115                 return -ENOSPC;
 116
 117         buf = kzalloc(buf_len, GFP_KERNEL);
 118         if (!buf)
 119                 return -ENOMEM;
 120
 121         for (i = 0; i < IWM_TX_QUEUES; i++) {
 122                 struct iwm_tx_queue *txq = &iwm->txq[i];
 123                 struct sk_buff *skb;
 124                 int j;
 125                 unsigned long flags;
 126
 127                 spin_lock_irqsave(&txq->queue.lock, flags);
 128
 129                 skb = (struct sk_buff *)&txq->queue;
 130
 131                 len += snprintf(buf + len, buf_len - len, "TXQ #%d\n", i);
 132                 len += snprintf(buf + len, buf_len - len, "\tStopped:     %d\n",
 133                                 __netif_subqueue_stopped(iwm_to_ndev(iwm),
 134                                                          txq->id));
 135                 len += snprintf(buf + len, buf_len - len, "\tConcat count:%d\n",
 136                                 txq->concat_count);
 137                 len += snprintf(buf + len, buf_len - len, "\tQueue len:   %d\n",
 138                                 skb_queue_len(&txq->queue));
 139                 for (j = 0; j < skb_queue_len(&txq->queue); j++) {
 140                         struct iwm_tx_info *tx_info;
 141
 142                         skb = skb->next;
 143                         tx_info = skb_to_tx_info(skb);
 144
 145                         len += snprintf(buf + len, buf_len - len,
 146                                         "\tSKB #%d\n", j);
 147                         len += snprintf(buf + len, buf_len - len,
 148                                         "\t\tsta:   %d\n", tx_info->sta);
 149                         len += snprintf(buf + len, buf_len - len,
 150                                         "\t\tcolor: %d\n", tx_info->color);
 151                         len += snprintf(buf + len, buf_len - len,
 152                                         "\t\ttid:   %d\n", tx_info->tid);
 153                 }
 154
 155                 spin_unlock_irqrestore(&txq->queue.lock, flags);
 156
 157                 spin_lock_irqsave(&txq->stopped_queue.lock, flags);
 158
 159                 len += snprintf(buf + len, buf_len - len,
 160                                 "\tStopped Queue len:   %d\n",
 161                                 skb_queue_len(&txq->stopped_queue));
 162                 for (j = 0; j < skb_queue_len(&txq->stopped_queue); j++) {
 163                         struct iwm_tx_info *tx_info;
 164
 165                         skb = skb->next;
 166                         tx_info = skb_to_tx_info(skb);
 167
 168                         len += snprintf(buf + len, buf_len - len,
 169                                         "\tSKB #%d\n", j);
 170                         len += snprintf(buf + len, buf_len - len,
 171                                         "\t\tsta:   %d\n", tx_info->sta);
 172                         len += snprintf(buf + len, buf_len - len,
 173                                         "\t\tcolor: %d\n", tx_info->color);
 174                         len += snprintf(buf + len, buf_len - len,
 175                                         "\t\ttid:   %d\n", tx_info->tid);
 176                 }
 177
 178                 spin_unlock_irqrestore(&txq->stopped_queue.lock, flags);
 179         }
 180
 181         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 182         kfree(buf);
 183
 184         return ret;
 185 }
 186
 187 static ssize_t iwm_debugfs_tx_credit_read(struct file *filp,
 188                                           char __user *buffer,
 189                                           size_t count, loff_t *ppos)
 190 {
 191         struct iwm_priv *iwm = filp->private_data;
 192         struct iwm_tx_credit *credit = &iwm->tx_credit;
 193         char *buf;
 194         int i, buf_len = 4096;
 195         size_t len = 0;
 196         ssize_t ret;
 197
 198         if (*ppos != 0)
 199                 return 0;
 200         if (count < sizeof(buf))
 201                 return -ENOSPC;
 202
 203         buf = kzalloc(buf_len, GFP_KERNEL);
 204         if (!buf)
 205                 return -ENOMEM;
 206
 207         len += snprintf(buf + len, buf_len - len,
 208                         "NR pools:  %d\n", credit->pool_nr);
 209         len += snprintf(buf + len, buf_len - len,
 210                         "pools map: 0x%lx\n", credit->full_pools_map);
 211
 212         len += snprintf(buf + len, buf_len - len, "\n### POOLS ###\n");
 213         for (i = 0; i < IWM_MACS_OUT_GROUPS; i++) {
 214                 len += snprintf(buf + len, buf_len - len,
 215                                 "pools entry #%d\n", i);
 216                 len += snprintf(buf + len, buf_len - len,
 217                                 "\tid:          %d\n",
 218                                 credit->pools[i].id);
 219                 len += snprintf(buf + len, buf_len - len,
 220                                 "\tsid:         %d\n",
 221                                 credit->pools[i].sid);
 222                 len += snprintf(buf + len, buf_len - len,
 223                                 "\tmin_pages:   %d\n",
 224                                 credit->pools[i].min_pages);
 225                 len += snprintf(buf + len, buf_len - len,
 226                                 "\tmax_pages:   %d\n",
 227                                 credit->pools[i].max_pages);
 228                 len += snprintf(buf + len, buf_len - len,
 229                                 "\talloc_pages: %d\n",
 230                                 credit->pools[i].alloc_pages);
 231                 len += snprintf(buf + len, buf_len - len,
 232                                 "\tfreed_pages: %d\n",
 233                                 credit->pools[i].total_freed_pages);
 234         }
 235
 236         len += snprintf(buf + len, buf_len - len, "\n### SPOOLS ###\n");
 237         for (i = 0; i < IWM_MACS_OUT_SGROUPS; i++) {
 238                 len += snprintf(buf + len, buf_len - len,
 239                                 "spools entry #%d\n", i);
 240                 len += snprintf(buf + len, buf_len - len,
 241                                 "\tid:          %d\n",
 242                                 credit->spools[i].id);
 243                 len += snprintf(buf + len, buf_len - len,
 244                                 "\tmax_pages:   %d\n",
 245                                 credit->spools[i].max_pages);
 246                 len += snprintf(buf + len, buf_len - len,
 247                                 "\talloc_pages: %d\n",
 248                                 credit->spools[i].alloc_pages);
 249
 250         }
 251
 252         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 253         kfree(buf);
 254
 255         return ret;
 256 }
 257
 258 static ssize_t iwm_debugfs_rx_ticket_read(struct file *filp,
 259                                           char __user *buffer,
 260                                           size_t count, loff_t *ppos)
 261 {
 262         struct iwm_priv *iwm = filp->private_data;
 263         struct iwm_rx_ticket_node *ticket;
 264         char *buf;
 265         int buf_len = 4096, i;
 266         size_t len = 0;
 267         ssize_t ret;
 268
 269         if (*ppos != 0)
 270                 return 0;
 271         if (count < sizeof(buf))
 272                 return -ENOSPC;
 273
 274         buf = kzalloc(buf_len, GFP_KERNEL);
 275         if (!buf)
 276                 return -ENOMEM;
 277
 278         spin_lock(&iwm->ticket_lock);
 279         list_for_each_entry(ticket, &iwm->rx_tickets, node) {
 280                 len += snprintf(buf + len, buf_len - len, "Ticket #%d\n",
 281                                 ticket->ticket->id);
 282                 len += snprintf(buf + len, buf_len - len, "\taction: 0x%x\n",
 283                                 ticket->ticket->action);
 284                 len += snprintf(buf + len, buf_len - len, "\tflags:  0x%x\n",
 285                                 ticket->ticket->flags);
 286         }
 287         spin_unlock(&iwm->ticket_lock);
 288
 289         for (i = 0; i < IWM_RX_ID_HASH; i++) {
 290                 struct iwm_rx_packet *packet;
 291                 struct list_head *pkt_list = &iwm->rx_packets[i];
 292
 293                 if (!list_empty(pkt_list)) {
 294                         len += snprintf(buf + len, buf_len - len,
 295                                         "Packet hash #%d\n", i);
 296                         spin_lock(&iwm->packet_lock[i]);
 297                         list_for_each_entry(packet, pkt_list, node) {
 298                                 len += snprintf(buf + len, buf_len - len,
 299                                                 "\tPacket id:     %d\n",
 300                                                 packet->id);
 301                                 len += snprintf(buf + len, buf_len - len,
 302                                                 "\tPacket length: %lu\n",
 303                                                 packet->pkt_size);
 304                         }
 305                         spin_unlock(&iwm->packet_lock[i]);
 306                 }
 307         }
 308
 309         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 310         kfree(buf);
 311
 312         return ret;
 313 }
 314
 315 static ssize_t iwm_debugfs_fw_err_read(struct file *filp,
 316                                        char __user *buffer,
 317                                        size_t count, loff_t *ppos)
 318 {
 319
 320         struct iwm_priv *iwm = filp->private_data;
 321         char buf[512];
 322         int buf_len = 512;
 323         size_t len = 0;
 324
 325         if (*ppos != 0)
 326                 return 0;
 327         if (count < sizeof(buf))
 328                 return -ENOSPC;
 329
 330         if (!iwm->last_fw_err)
 331                 return -ENOMEM;
 332
 333         if (iwm->last_fw_err->line_num == 0)
 334                 goto out;
 335
 336         len += snprintf(buf + len, buf_len - len, "%cMAC FW ERROR:\n",
 337              (le32_to_cpu(iwm->last_fw_err->category) == UMAC_SYS_ERR_CAT_LMAC)
 338                         ? 'L' : 'U');
 339         len += snprintf(buf + len, buf_len - len,
 340                         "\tCategory:    %d\n",
 341                         le32_to_cpu(iwm->last_fw_err->category));
 342
 343         len += snprintf(buf + len, buf_len - len,
 344                         "\tStatus:      0x%x\n",
 345                         le32_to_cpu(iwm->last_fw_err->status));
 346
 347         len += snprintf(buf + len, buf_len - len,
 348                         "\tPC:          0x%x\n",
 349                         le32_to_cpu(iwm->last_fw_err->pc));
 350
 351         len += snprintf(buf + len, buf_len - len,
 352                         "\tblink1:      %d\n",
 353                         le32_to_cpu(iwm->last_fw_err->blink1));
 354
 355         len += snprintf(buf + len, buf_len - len,
 356                         "\tblink2:      %d\n",
 357                         le32_to_cpu(iwm->last_fw_err->blink2));
 358
 359         len += snprintf(buf + len, buf_len - len,
 360                         "\tilink1:      %d\n",
 361                         le32_to_cpu(iwm->last_fw_err->ilink1));
 362
 363         len += snprintf(buf + len, buf_len - len,
 364                         "\tilink2:      %d\n",
 365                         le32_to_cpu(iwm->last_fw_err->ilink2));
 366
 367         len += snprintf(buf + len, buf_len - len,
 368                         "\tData1:       0x%x\n",
 369                         le32_to_cpu(iwm->last_fw_err->data1));
 370
 371         len += snprintf(buf + len, buf_len - len,
 372                         "\tData2:       0x%x\n",
 373                         le32_to_cpu(iwm->last_fw_err->data2));
 374
 375         len += snprintf(buf + len, buf_len - len,
 376                         "\tLine number: %d\n",
 377                         le32_to_cpu(iwm->last_fw_err->line_num));
 378
 379         len += snprintf(buf + len, buf_len - len,
 380                         "\tUMAC status: 0x%x\n",
 381                         le32_to_cpu(iwm->last_fw_err->umac_status));
 382
 383         len += snprintf(buf + len, buf_len - len,
 384                         "\tLMAC status: 0x%x\n",
 385                         le32_to_cpu(iwm->last_fw_err->lmac_status));
 386
 387         len += snprintf(buf + len, buf_len - len,
 388                         "\tSDIO status: 0x%x\n",
 389                         le32_to_cpu(iwm->last_fw_err->sdio_status));
 390
 391 out:
 392
 393         return simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 394 }
 395
 396 static const struct file_operations iwm_debugfs_txq_fops = {
 397         .owner =        THIS_MODULE,
 398         .open =         simple_open,
 399         .read =         iwm_debugfs_txq_read,
 400         .llseek =       default_llseek,
 401 };
 402
 403 static const struct file_operations iwm_debugfs_tx_credit_fops = {
 404         .owner =        THIS_MODULE,
 405         .open =         simple_open,
 406         .read =         iwm_debugfs_tx_credit_read,
 407         .llseek =       default_llseek,
 408 };
 409
 410 static const struct file_operations iwm_debugfs_rx_ticket_fops = {
 411         .owner =        THIS_MODULE,
 412         .open =         simple_open,
 413         .read =         iwm_debugfs_rx_ticket_read,
 414         .llseek =       default_llseek,
 415 };
 416
 417 static const struct file_operations iwm_debugfs_fw_err_fops = {
 418         .owner =        THIS_MODULE,
 419         .open =         simple_open,
 420         .read =         iwm_debugfs_fw_err_read,
 421         .llseek =       default_llseek,
 422 };
 423
 424 void iwm_debugfs_init(struct iwm_priv *iwm)
 425 {
 426         int i;
 427
 428         iwm->dbg.rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 429         iwm->dbg.devdir = debugfs_create_dir(wiphy_name(iwm_to_wiphy(iwm)),
 430                                              iwm->dbg.rootdir);
 431         iwm->dbg.dbgdir = debugfs_create_dir("debug", iwm->dbg.devdir);
 432         iwm->dbg.rxdir = debugfs_create_dir("rx", iwm->dbg.devdir);
 433         iwm->dbg.txdir = debugfs_create_dir("tx", iwm->dbg.devdir);
 434         iwm->dbg.busdir = debugfs_create_dir("bus", iwm->dbg.devdir);
 435         if (iwm->bus_ops->debugfs_init)
 436                 iwm->bus_ops->debugfs_init(iwm, iwm->dbg.busdir);
 437
 438         iwm->dbg.dbg_level = IWM_DL_NONE;
 439         iwm->dbg.dbg_level_dentry =
 440                 debugfs_create_file("level", 0200, iwm->dbg.dbgdir, iwm,
 441                                     &fops_iwm_dbg_level);
 442
 443         iwm->dbg.dbg_modules = IWM_DM_DEFAULT;
 444         iwm->dbg.dbg_modules_dentry =
 445                 debugfs_create_file("modules", 0200, iwm->dbg.dbgdir, iwm,
 446                                     &fops_iwm_dbg_modules);
 447
 448         for (i = 0; i < __IWM_DM_NR; i++)
 449                 add_dbg_module(iwm->dbg, iwm_debug_module[i].name,
 450                                iwm_debug_module[i].id, IWM_DL_DEFAULT);
 451
 452         iwm->dbg.txq_dentry = debugfs_create_file("queues", 0200,
 453                                                   iwm->dbg.txdir, iwm,
 454                                                   &iwm_debugfs_txq_fops);
 455         iwm->dbg.tx_credit_dentry = debugfs_create_file("credits", 0200,
 456                                                    iwm->dbg.txdir, iwm,
 457                                                    &iwm_debugfs_tx_credit_fops);
 458         iwm->dbg.rx_ticket_dentry = debugfs_create_file("tickets", 0200,
 459                                                   iwm->dbg.rxdir, iwm,
 460                                                   &iwm_debugfs_rx_ticket_fops);
 461         iwm->dbg.fw_err_dentry = debugfs_create_file("last_fw_err", 0200,
 462                                                      iwm->dbg.dbgdir, iwm,
 463                                                      &iwm_debugfs_fw_err_fops);
 464 }
 465
 466 void iwm_debugfs_exit(struct iwm_priv *iwm)
 467 {
 468         int i;
 469
 470         for (i = 0; i < __IWM_DM_NR; i++)
 471                 debugfs_remove(iwm->dbg.dbg_module_dentries[i]);
 472
 473         debugfs_remove(iwm->dbg.dbg_modules_dentry);
 474         debugfs_remove(iwm->dbg.dbg_level_dentry);
 475         debugfs_remove(iwm->dbg.txq_dentry);
 476         debugfs_remove(iwm->dbg.tx_credit_dentry);
 477         debugfs_remove(iwm->dbg.rx_ticket_dentry);
 478         debugfs_remove(iwm->dbg.fw_err_dentry);
 479         if (iwm->bus_ops->debugfs_exit)
 480                 iwm->bus_ops->debugfs_exit(iwm);
 481
 482         debugfs_remove(iwm->dbg.busdir);
 483         debugfs_remove(iwm->dbg.dbgdir);
 484         debugfs_remove(iwm->dbg.txdir);
 485         debugfs_remove(iwm->dbg.rxdir);
 486         debugfs_remove(iwm->dbg.devdir);
 487         debugfs_remove(iwm->dbg.rootdir);
 488 }