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 static int iwm_generic_open(struct inode *inode, struct file *filp)
 103 {
 104         filp->private_data = inode->i_private;
 105         return 0;
 106 }
 107
 108
 109 static ssize_t iwm_debugfs_txq_read(struct file *filp, char __user *buffer,
 110                                    size_t count, loff_t *ppos)
 111 {
 112         struct iwm_priv *iwm = filp->private_data;
 113         char *buf;
 114         int i, buf_len = 4096;
 115         size_t len = 0;
 116         ssize_t ret;
 117
 118         if (*ppos != 0)
 119                 return 0;
 120         if (count < sizeof(buf))
 121                 return -ENOSPC;
 122
 123         buf = kzalloc(buf_len, GFP_KERNEL);
 124         if (!buf)
 125                 return -ENOMEM;
 126
 127         for (i = 0; i < IWM_TX_QUEUES; i++) {
 128                 struct iwm_tx_queue *txq = &iwm->txq[i];
 129                 struct sk_buff *skb;
 130                 int j;
 131                 unsigned long flags;
 132
 133                 spin_lock_irqsave(&txq->queue.lock, flags);
 134
 135                 skb = (struct sk_buff *)&txq->queue;
 136
 137                 len += snprintf(buf + len, buf_len - len, "TXQ #%d\n", i);
 138                 len += snprintf(buf + len, buf_len - len, "\tStopped:     %d\n",
 139                                 __netif_subqueue_stopped(iwm_to_ndev(iwm),
 140                                                          txq->id));
 141                 len += snprintf(buf + len, buf_len - len, "\tConcat count:%d\n",
 142                                 txq->concat_count);
 143                 len += snprintf(buf + len, buf_len - len, "\tQueue len:   %d\n",
 144                                 skb_queue_len(&txq->queue));
 145                 for (j = 0; j < skb_queue_len(&txq->queue); j++) {
 146                         struct iwm_tx_info *tx_info;
 147
 148                         skb = skb->next;
 149                         tx_info = skb_to_tx_info(skb);
 150
 151                         len += snprintf(buf + len, buf_len - len,
 152                                         "\tSKB #%d\n", j);
 153                         len += snprintf(buf + len, buf_len - len,
 154                                         "\t\tsta:   %d\n", tx_info->sta);
 155                         len += snprintf(buf + len, buf_len - len,
 156                                         "\t\tcolor: %d\n", tx_info->color);
 157                         len += snprintf(buf + len, buf_len - len,
 158                                         "\t\ttid:   %d\n", tx_info->tid);
 159                 }
 160
 161                 spin_unlock_irqrestore(&txq->queue.lock, flags);
 162
 163                 spin_lock_irqsave(&txq->stopped_queue.lock, flags);
 164
 165                 len += snprintf(buf + len, buf_len - len,
 166                                 "\tStopped Queue len:   %d\n",
 167                                 skb_queue_len(&txq->stopped_queue));
 168                 for (j = 0; j < skb_queue_len(&txq->stopped_queue); j++) {
 169                         struct iwm_tx_info *tx_info;
 170
 171                         skb = skb->next;
 172                         tx_info = skb_to_tx_info(skb);
 173
 174                         len += snprintf(buf + len, buf_len - len,
 175                                         "\tSKB #%d\n", j);
 176                         len += snprintf(buf + len, buf_len - len,
 177                                         "\t\tsta:   %d\n", tx_info->sta);
 178                         len += snprintf(buf + len, buf_len - len,
 179                                         "\t\tcolor: %d\n", tx_info->color);
 180                         len += snprintf(buf + len, buf_len - len,
 181                                         "\t\ttid:   %d\n", tx_info->tid);
 182                 }
 183
 184                 spin_unlock_irqrestore(&txq->stopped_queue.lock, flags);
 185         }
 186
 187         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 188         kfree(buf);
 189
 190         return ret;
 191 }
 192
 193 static ssize_t iwm_debugfs_tx_credit_read(struct file *filp,
 194                                           char __user *buffer,
 195                                           size_t count, loff_t *ppos)
 196 {
 197         struct iwm_priv *iwm = filp->private_data;
 198         struct iwm_tx_credit *credit = &iwm->tx_credit;
 199         char *buf;
 200         int i, buf_len = 4096;
 201         size_t len = 0;
 202         ssize_t ret;
 203
 204         if (*ppos != 0)
 205                 return 0;
 206         if (count < sizeof(buf))
 207                 return -ENOSPC;
 208
 209         buf = kzalloc(buf_len, GFP_KERNEL);
 210         if (!buf)
 211                 return -ENOMEM;
 212
 213         len += snprintf(buf + len, buf_len - len,
 214                         "NR pools:  %d\n", credit->pool_nr);
 215         len += snprintf(buf + len, buf_len - len,
 216                         "pools map: 0x%lx\n", credit->full_pools_map);
 217
 218         len += snprintf(buf + len, buf_len - len, "\n### POOLS ###\n");
 219         for (i = 0; i < IWM_MACS_OUT_GROUPS; i++) {
 220                 len += snprintf(buf + len, buf_len - len,
 221                                 "pools entry #%d\n", i);
 222                 len += snprintf(buf + len, buf_len - len,
 223                                 "\tid:          %d\n",
 224                                 credit->pools[i].id);
 225                 len += snprintf(buf + len, buf_len - len,
 226                                 "\tsid:         %d\n",
 227                                 credit->pools[i].sid);
 228                 len += snprintf(buf + len, buf_len - len,
 229                                 "\tmin_pages:   %d\n",
 230                                 credit->pools[i].min_pages);
 231                 len += snprintf(buf + len, buf_len - len,
 232                                 "\tmax_pages:   %d\n",
 233                                 credit->pools[i].max_pages);
 234                 len += snprintf(buf + len, buf_len - len,
 235                                 "\talloc_pages: %d\n",
 236                                 credit->pools[i].alloc_pages);
 237                 len += snprintf(buf + len, buf_len - len,
 238                                 "\tfreed_pages: %d\n",
 239                                 credit->pools[i].total_freed_pages);
 240         }
 241
 242         len += snprintf(buf + len, buf_len - len, "\n### SPOOLS ###\n");
 243         for (i = 0; i < IWM_MACS_OUT_SGROUPS; i++) {
 244                 len += snprintf(buf + len, buf_len - len,
 245                                 "spools entry #%d\n", i);
 246                 len += snprintf(buf + len, buf_len - len,
 247                                 "\tid:          %d\n",
 248                                 credit->spools[i].id);
 249                 len += snprintf(buf + len, buf_len - len,
 250                                 "\tmax_pages:   %d\n",
 251                                 credit->spools[i].max_pages);
 252                 len += snprintf(buf + len, buf_len - len,
 253                                 "\talloc_pages: %d\n",
 254                                 credit->spools[i].alloc_pages);
 255
 256         }
 257
 258         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 259         kfree(buf);
 260
 261         return ret;
 262 }
 263
 264 static ssize_t iwm_debugfs_rx_ticket_read(struct file *filp,
 265                                           char __user *buffer,
 266                                           size_t count, loff_t *ppos)
 267 {
 268         struct iwm_priv *iwm = filp->private_data;
 269         struct iwm_rx_ticket_node *ticket;
 270         char *buf;
 271         int buf_len = 4096, i;
 272         size_t len = 0;
 273         ssize_t ret;
 274
 275         if (*ppos != 0)
 276                 return 0;
 277         if (count < sizeof(buf))
 278                 return -ENOSPC;
 279
 280         buf = kzalloc(buf_len, GFP_KERNEL);
 281         if (!buf)
 282                 return -ENOMEM;
 283
 284         spin_lock(&iwm->ticket_lock);
 285         list_for_each_entry(ticket, &iwm->rx_tickets, node) {
 286                 len += snprintf(buf + len, buf_len - len, "Ticket #%d\n",
 287                                 ticket->ticket->id);
 288                 len += snprintf(buf + len, buf_len - len, "\taction: 0x%x\n",
 289                                 ticket->ticket->action);
 290                 len += snprintf(buf + len, buf_len - len, "\tflags:  0x%x\n",
 291                                 ticket->ticket->flags);
 292         }
 293         spin_unlock(&iwm->ticket_lock);
 294
 295         for (i = 0; i < IWM_RX_ID_HASH; i++) {
 296                 struct iwm_rx_packet *packet;
 297                 struct list_head *pkt_list = &iwm->rx_packets[i];
 298
 299                 if (!list_empty(pkt_list)) {
 300                         len += snprintf(buf + len, buf_len - len,
 301                                         "Packet hash #%d\n", i);
 302                         spin_lock(&iwm->packet_lock[i]);
 303                         list_for_each_entry(packet, pkt_list, node) {
 304                                 len += snprintf(buf + len, buf_len - len,
 305                                                 "\tPacket id:     %d\n",
 306                                                 packet->id);
 307                                 len += snprintf(buf + len, buf_len - len,
 308                                                 "\tPacket length: %lu\n",
 309                                                 packet->pkt_size);
 310                         }
 311                         spin_unlock(&iwm->packet_lock[i]);
 312                 }
 313         }
 314
 315         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 316         kfree(buf);
 317
 318         return ret;
 319 }
 320
 321 static ssize_t iwm_debugfs_fw_err_read(struct file *filp,
 322                                        char __user *buffer,
 323                                        size_t count, loff_t *ppos)
 324 {
 325
 326         struct iwm_priv *iwm = filp->private_data;
 327         char buf[512];
 328         int buf_len = 512;
 329         size_t len = 0;
 330
 331         if (*ppos != 0)
 332                 return 0;
 333         if (count < sizeof(buf))
 334                 return -ENOSPC;
 335
 336         if (!iwm->last_fw_err)
 337                 return -ENOMEM;
 338
 339         if (iwm->last_fw_err->line_num == 0)
 340                 goto out;
 341
 342         len += snprintf(buf + len, buf_len - len, "%cMAC FW ERROR:\n",
 343              (le32_to_cpu(iwm->last_fw_err->category) == UMAC_SYS_ERR_CAT_LMAC)
 344                         ? 'L' : 'U');
 345         len += snprintf(buf + len, buf_len - len,
 346                         "\tCategory:    %d\n",
 347                         le32_to_cpu(iwm->last_fw_err->category));
 348
 349         len += snprintf(buf + len, buf_len - len,
 350                         "\tStatus:      0x%x\n",
 351                         le32_to_cpu(iwm->last_fw_err->status));
 352
 353         len += snprintf(buf + len, buf_len - len,
 354                         "\tPC:          0x%x\n",
 355                         le32_to_cpu(iwm->last_fw_err->pc));
 356
 357         len += snprintf(buf + len, buf_len - len,
 358                         "\tblink1:      %d\n",
 359                         le32_to_cpu(iwm->last_fw_err->blink1));
 360
 361         len += snprintf(buf + len, buf_len - len,
 362                         "\tblink2:      %d\n",
 363                         le32_to_cpu(iwm->last_fw_err->blink2));
 364
 365         len += snprintf(buf + len, buf_len - len,
 366                         "\tilink1:      %d\n",
 367                         le32_to_cpu(iwm->last_fw_err->ilink1));
 368
 369         len += snprintf(buf + len, buf_len - len,
 370                         "\tilink2:      %d\n",
 371                         le32_to_cpu(iwm->last_fw_err->ilink2));
 372
 373         len += snprintf(buf + len, buf_len - len,
 374                         "\tData1:       0x%x\n",
 375                         le32_to_cpu(iwm->last_fw_err->data1));
 376
 377         len += snprintf(buf + len, buf_len - len,
 378                         "\tData2:       0x%x\n",
 379                         le32_to_cpu(iwm->last_fw_err->data2));
 380
 381         len += snprintf(buf + len, buf_len - len,
 382                         "\tLine number: %d\n",
 383                         le32_to_cpu(iwm->last_fw_err->line_num));
 384
 385         len += snprintf(buf + len, buf_len - len,
 386                         "\tUMAC status: 0x%x\n",
 387                         le32_to_cpu(iwm->last_fw_err->umac_status));
 388
 389         len += snprintf(buf + len, buf_len - len,
 390                         "\tLMAC status: 0x%x\n",
 391                         le32_to_cpu(iwm->last_fw_err->lmac_status));
 392
 393         len += snprintf(buf + len, buf_len - len,
 394                         "\tSDIO status: 0x%x\n",
 395                         le32_to_cpu(iwm->last_fw_err->sdio_status));
 396
 397 out:
 398
 399         return simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 400 }
 401
 402 static const struct file_operations iwm_debugfs_txq_fops = {
 403         .owner =        THIS_MODULE,
 404         .open =         iwm_generic_open,
 405         .read =         iwm_debugfs_txq_read,
 406         .llseek =       default_llseek,
 407 };
 408
 409 static const struct file_operations iwm_debugfs_tx_credit_fops = {
 410         .owner =        THIS_MODULE,
 411         .open =         iwm_generic_open,
 412         .read =         iwm_debugfs_tx_credit_read,
 413         .llseek =       default_llseek,
 414 };
 415
 416 static const struct file_operations iwm_debugfs_rx_ticket_fops = {
 417         .owner =        THIS_MODULE,
 418         .open =         iwm_generic_open,
 419         .read =         iwm_debugfs_rx_ticket_read,
 420         .llseek =       default_llseek,
 421 };
 422
 423 static const struct file_operations iwm_debugfs_fw_err_fops = {
 424         .owner =        THIS_MODULE,
 425         .open =         iwm_generic_open,
 426         .read =         iwm_debugfs_fw_err_read,
 427         .llseek =       default_llseek,
 428 };
 429
 430 void iwm_debugfs_init(struct iwm_priv *iwm)
 431 {
 432         int i;
 433
 434         iwm->dbg.rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 435         iwm->dbg.devdir = debugfs_create_dir(wiphy_name(iwm_to_wiphy(iwm)),
 436                                              iwm->dbg.rootdir);
 437         iwm->dbg.dbgdir = debugfs_create_dir("debug", iwm->dbg.devdir);
 438         iwm->dbg.rxdir = debugfs_create_dir("rx", iwm->dbg.devdir);
 439         iwm->dbg.txdir = debugfs_create_dir("tx", iwm->dbg.devdir);
 440         iwm->dbg.busdir = debugfs_create_dir("bus", iwm->dbg.devdir);
 441         if (iwm->bus_ops->debugfs_init)
 442                 iwm->bus_ops->debugfs_init(iwm, iwm->dbg.busdir);
 443
 444         iwm->dbg.dbg_level = IWM_DL_NONE;
 445         iwm->dbg.dbg_level_dentry =
 446                 debugfs_create_file("level", 0200, iwm->dbg.dbgdir, iwm,
 447                                     &fops_iwm_dbg_level);
 448
 449         iwm->dbg.dbg_modules = IWM_DM_DEFAULT;
 450         iwm->dbg.dbg_modules_dentry =
 451                 debugfs_create_file("modules", 0200, iwm->dbg.dbgdir, iwm,
 452                                     &fops_iwm_dbg_modules);
 453
 454         for (i = 0; i < __IWM_DM_NR; i++)
 455                 add_dbg_module(iwm->dbg, iwm_debug_module[i].name,
 456                                iwm_debug_module[i].id, IWM_DL_DEFAULT);
 457
 458         iwm->dbg.txq_dentry = debugfs_create_file("queues", 0200,
 459                                                   iwm->dbg.txdir, iwm,
 460                                                   &iwm_debugfs_txq_fops);
 461         iwm->dbg.tx_credit_dentry = debugfs_create_file("credits", 0200,
 462                                                    iwm->dbg.txdir, iwm,
 463                                                    &iwm_debugfs_tx_credit_fops);
 464         iwm->dbg.rx_ticket_dentry = debugfs_create_file("tickets", 0200,
 465                                                   iwm->dbg.rxdir, iwm,
 466                                                   &iwm_debugfs_rx_ticket_fops);
 467         iwm->dbg.fw_err_dentry = debugfs_create_file("last_fw_err", 0200,
 468                                                      iwm->dbg.dbgdir, iwm,
 469                                                      &iwm_debugfs_fw_err_fops);
 470 }
 471
 472 void iwm_debugfs_exit(struct iwm_priv *iwm)
 473 {
 474         int i;
 475
 476         for (i = 0; i < __IWM_DM_NR; i++)
 477                 debugfs_remove(iwm->dbg.dbg_module_dentries[i]);
 478
 479         debugfs_remove(iwm->dbg.dbg_modules_dentry);
 480         debugfs_remove(iwm->dbg.dbg_level_dentry);
 481         debugfs_remove(iwm->dbg.txq_dentry);
 482         debugfs_remove(iwm->dbg.tx_credit_dentry);
 483         debugfs_remove(iwm->dbg.rx_ticket_dentry);
 484         debugfs_remove(iwm->dbg.fw_err_dentry);
 485         if (iwm->bus_ops->debugfs_exit)
 486                 iwm->bus_ops->debugfs_exit(iwm);
 487
 488         debugfs_remove(iwm->dbg.busdir);
 489         debugfs_remove(iwm->dbg.dbgdir);
 490         debugfs_remove(iwm->dbg.txdir);
 491         debugfs_remove(iwm->dbg.rxdir);
 492         debugfs_remove(iwm->dbg.devdir);
 493         debugfs_remove(iwm->dbg.rootdir);
 494 }