drivers/net/wireless/iwlwifi/iwl-core.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/sched.h>
  32 #include <linux/slab.h>
  33 #include <net/mac80211.h>
  34
  35 #include "iwl-eeprom.h"
  36 #include "iwl-debug.h"
  37 #include "iwl-core.h"
  38 #include "iwl-io.h"
  39 #include "iwl-power.h"
  40 #include "iwl-shared.h"
  41 #include "iwl-agn.h"
  42 #include "iwl-trans.h"
  43
  44 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
  45
  46 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
  47 {
  48         /*
  49          * MULTI-FIXME
  50          * See iwlagn_mac_channel_switch.
  51          */
  52         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
  53
  54         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
  55                 return;
  56
  57         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
  58                 ieee80211_chswitch_done(ctx->vif, is_success);
  59 }
  60
  61 #ifdef CONFIG_IWLWIFI_DEBUG
  62 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
  63                              enum iwl_rxon_context_id ctxid)
  64 {
  65         struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
  66         struct iwl_rxon_cmd *rxon = &ctx->staging;
  67
  68         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
  69         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
  70         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
  71         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
  72         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
  73                         le32_to_cpu(rxon->filter_flags));
  74         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
  75         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
  76                         rxon->ofdm_basic_rates);
  77         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
  78         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
  79         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
  80         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
  81 }
  82 #endif
  83
  84 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
  85 {
  86         unsigned int reload_msec;
  87         unsigned long reload_jiffies;
  88
  89 #ifdef CONFIG_IWLWIFI_DEBUG
  90         if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
  91                 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
  92 #endif
  93
  94         /* uCode is no longer loaded. */
  95         priv->ucode_loaded = false;
  96
  97         /* Set the FW error flag -- cleared on iwl_down */
  98         set_bit(STATUS_FW_ERROR, &priv->status);
  99
 100         /* Cancel currently queued command. */
 101         clear_bit(STATUS_HCMD_ACTIVE, &priv->shrd->status);
 102
 103         iwl_abort_notification_waits(&priv->notif_wait);
 104
 105         /* Keep the restart process from trying to send host
 106          * commands by clearing the ready bit */
 107         clear_bit(STATUS_READY, &priv->status);
 108
 109         wake_up(&trans(priv)->wait_command_queue);
 110
 111         if (!ondemand) {
 112                 /*
 113                  * If firmware keep reloading, then it indicate something
 114                  * serious wrong and firmware having problem to recover
 115                  * from it. Instead of keep trying which will fill the syslog
 116                  * and hang the system, let's just stop it
 117                  */
 118                 reload_jiffies = jiffies;
 119                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
 120                                         (long) priv->reload_jiffies);
 121                 priv->reload_jiffies = reload_jiffies;
 122                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
 123                         priv->reload_count++;
 124                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
 125                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
 126                                 return;
 127                         }
 128                 } else
 129                         priv->reload_count = 0;
 130         }
 131
 132         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 133                 if (iwlagn_mod_params.restart_fw) {
 134                         IWL_DEBUG_FW_ERRORS(priv,
 135                                   "Restarting adapter due to uCode error.\n");
 136                         queue_work(priv->workqueue, &priv->restart);
 137                 } else
 138                         IWL_DEBUG_FW_ERRORS(priv,
 139                                   "Detected FW error, but not restarting\n");
 140         }
 141 }
 142
 143 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 144 {
 145         int ret;
 146         s8 prev_tx_power;
 147         bool defer;
 148         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 149
 150         lockdep_assert_held(&priv->mutex);
 151
 152         if (priv->tx_power_user_lmt == tx_power && !force)
 153                 return 0;
 154
 155         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
 156                 IWL_WARN(priv,
 157                          "Requested user TXPOWER %d below lower limit %d.\n",
 158                          tx_power,
 159                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
 160                 return -EINVAL;
 161         }
 162
 163         if (tx_power > priv->tx_power_device_lmt) {
 164                 IWL_WARN(priv,
 165                         "Requested user TXPOWER %d above upper limit %d.\n",
 166                          tx_power, priv->tx_power_device_lmt);
 167                 return -EINVAL;
 168         }
 169
 170         if (!iwl_is_ready_rf(priv))
 171                 return -EIO;
 172
 173         /* scan complete and commit_rxon use tx_power_next value,
 174          * it always need to be updated for newest request */
 175         priv->tx_power_next = tx_power;
 176
 177         /* do not set tx power when scanning or channel changing */
 178         defer = test_bit(STATUS_SCANNING, &priv->status) ||
 179                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
 180         if (defer && !force) {
 181                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
 182                 return 0;
 183         }
 184
 185         prev_tx_power = priv->tx_power_user_lmt;
 186         priv->tx_power_user_lmt = tx_power;
 187
 188         ret = iwlagn_send_tx_power(priv);
 189
 190         /* if fail to set tx_power, restore the orig. tx power */
 191         if (ret) {
 192                 priv->tx_power_user_lmt = prev_tx_power;
 193                 priv->tx_power_next = prev_tx_power;
 194         }
 195         return ret;
 196 }
 197
 198 void iwl_send_bt_config(struct iwl_priv *priv)
 199 {
 200         struct iwl_bt_cmd bt_cmd = {
 201                 .lead_time = BT_LEAD_TIME_DEF,
 202                 .max_kill = BT_MAX_KILL_DEF,
 203                 .kill_ack_mask = 0,
 204                 .kill_cts_mask = 0,
 205         };
 206
 207         if (!iwlagn_mod_params.bt_coex_active)
 208                 bt_cmd.flags = BT_COEX_DISABLE;
 209         else
 210                 bt_cmd.flags = BT_COEX_ENABLE;
 211
 212         priv->bt_enable_flag = bt_cmd.flags;
 213         IWL_DEBUG_INFO(priv, "BT coex %s\n",
 214                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
 215
 216         if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 217                              CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
 218                 IWL_ERR(priv, "failed to send BT Coex Config\n");
 219 }
 220
 221 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
 222 {
 223         struct iwl_statistics_cmd statistics_cmd = {
 224                 .configuration_flags =
 225                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
 226         };
 227
 228         if (flags & CMD_ASYNC)
 229                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 230                                               CMD_ASYNC,
 231                                                sizeof(struct iwl_statistics_cmd),
 232                                                &statistics_cmd);
 233         else
 234                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 235                                         CMD_SYNC,
 236                                         sizeof(struct iwl_statistics_cmd),
 237                                         &statistics_cmd);
 238 }
 239
 240
 241
 242
 243 #ifdef CONFIG_IWLWIFI_DEBUGFS
 244
 245 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
 246
 247 void iwl_reset_traffic_log(struct iwl_priv *priv)
 248 {
 249         priv->tx_traffic_idx = 0;
 250         priv->rx_traffic_idx = 0;
 251         if (priv->tx_traffic)
 252                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
 253         if (priv->rx_traffic)
 254                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
 255 }
 256
 257 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
 258 {
 259         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
 260
 261         if (iwl_have_debug_level(IWL_DL_TX)) {
 262                 if (!priv->tx_traffic) {
 263                         priv->tx_traffic =
 264                                 kzalloc(traffic_size, GFP_KERNEL);
 265                         if (!priv->tx_traffic)
 266                                 return -ENOMEM;
 267                 }
 268         }
 269         if (iwl_have_debug_level(IWL_DL_RX)) {
 270                 if (!priv->rx_traffic) {
 271                         priv->rx_traffic =
 272                                 kzalloc(traffic_size, GFP_KERNEL);
 273                         if (!priv->rx_traffic)
 274                                 return -ENOMEM;
 275                 }
 276         }
 277         iwl_reset_traffic_log(priv);
 278         return 0;
 279 }
 280
 281 void iwl_free_traffic_mem(struct iwl_priv *priv)
 282 {
 283         kfree(priv->tx_traffic);
 284         priv->tx_traffic = NULL;
 285
 286         kfree(priv->rx_traffic);
 287         priv->rx_traffic = NULL;
 288 }
 289
 290 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
 291                       u16 length, struct ieee80211_hdr *header)
 292 {
 293         __le16 fc;
 294         u16 len;
 295
 296         if (likely(!iwl_have_debug_level(IWL_DL_TX)))
 297                 return;
 298
 299         if (!priv->tx_traffic)
 300                 return;
 301
 302         fc = header->frame_control;
 303         if (ieee80211_is_data(fc)) {
 304                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
 305                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
 306                 memcpy((priv->tx_traffic +
 307                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
 308                        header, len);
 309                 priv->tx_traffic_idx =
 310                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
 311         }
 312 }
 313
 314 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
 315                       u16 length, struct ieee80211_hdr *header)
 316 {
 317         __le16 fc;
 318         u16 len;
 319
 320         if (likely(!iwl_have_debug_level(IWL_DL_RX)))
 321                 return;
 322
 323         if (!priv->rx_traffic)
 324                 return;
 325
 326         fc = header->frame_control;
 327         if (ieee80211_is_data(fc)) {
 328                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
 329                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
 330                 memcpy((priv->rx_traffic +
 331                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
 332                        header, len);
 333                 priv->rx_traffic_idx =
 334                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
 335         }
 336 }
 337
 338 const char *get_mgmt_string(int cmd)
 339 {
 340         switch (cmd) {
 341                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
 342                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
 343                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
 344                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
 345                 IWL_CMD(MANAGEMENT_PROBE_REQ);
 346                 IWL_CMD(MANAGEMENT_PROBE_RESP);
 347                 IWL_CMD(MANAGEMENT_BEACON);
 348                 IWL_CMD(MANAGEMENT_ATIM);
 349                 IWL_CMD(MANAGEMENT_DISASSOC);
 350                 IWL_CMD(MANAGEMENT_AUTH);
 351                 IWL_CMD(MANAGEMENT_DEAUTH);
 352                 IWL_CMD(MANAGEMENT_ACTION);
 353         default:
 354                 return "UNKNOWN";
 355
 356         }
 357 }
 358
 359 const char *get_ctrl_string(int cmd)
 360 {
 361         switch (cmd) {
 362                 IWL_CMD(CONTROL_BACK_REQ);
 363                 IWL_CMD(CONTROL_BACK);
 364                 IWL_CMD(CONTROL_PSPOLL);
 365                 IWL_CMD(CONTROL_RTS);
 366                 IWL_CMD(CONTROL_CTS);
 367                 IWL_CMD(CONTROL_ACK);
 368                 IWL_CMD(CONTROL_CFEND);
 369                 IWL_CMD(CONTROL_CFENDACK);
 370         default:
 371                 return "UNKNOWN";
 372
 373         }
 374 }
 375
 376 void iwl_clear_traffic_stats(struct iwl_priv *priv)
 377 {
 378         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
 379         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
 380 }
 381
 382 /*
 383  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
 384  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
 385  * Use debugFs to display the rx/rx_statistics
 386  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
 387  * information will be recorded, but DATA pkt still will be recorded
 388  * for the reason of iwl_led.c need to control the led blinking based on
 389  * number of tx and rx data.
 390  *
 391  */
 392 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
 393 {
 394         struct traffic_stats    *stats;
 395
 396         if (is_tx)
 397                 stats = &priv->tx_stats;
 398         else
 399                 stats = &priv->rx_stats;
 400
 401         if (ieee80211_is_mgmt(fc)) {
 402                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
 403                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
 404                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
 405                         break;
 406                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
 407                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
 408                         break;
 409                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
 410                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
 411                         break;
 412                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
 413                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
 414                         break;
 415                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
 416                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
 417                         break;
 418                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
 419                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
 420                         break;
 421                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
 422                         stats->mgmt[MANAGEMENT_BEACON]++;
 423                         break;
 424                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
 425                         stats->mgmt[MANAGEMENT_ATIM]++;
 426                         break;
 427                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
 428                         stats->mgmt[MANAGEMENT_DISASSOC]++;
 429                         break;
 430                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
 431                         stats->mgmt[MANAGEMENT_AUTH]++;
 432                         break;
 433                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
 434                         stats->mgmt[MANAGEMENT_DEAUTH]++;
 435                         break;
 436                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
 437                         stats->mgmt[MANAGEMENT_ACTION]++;
 438                         break;
 439                 }
 440         } else if (ieee80211_is_ctl(fc)) {
 441                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
 442                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
 443                         stats->ctrl[CONTROL_BACK_REQ]++;
 444                         break;
 445                 case cpu_to_le16(IEEE80211_STYPE_BACK):
 446                         stats->ctrl[CONTROL_BACK]++;
 447                         break;
 448                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
 449                         stats->ctrl[CONTROL_PSPOLL]++;
 450                         break;
 451                 case cpu_to_le16(IEEE80211_STYPE_RTS):
 452                         stats->ctrl[CONTROL_RTS]++;
 453                         break;
 454                 case cpu_to_le16(IEEE80211_STYPE_CTS):
 455                         stats->ctrl[CONTROL_CTS]++;
 456                         break;
 457                 case cpu_to_le16(IEEE80211_STYPE_ACK):
 458                         stats->ctrl[CONTROL_ACK]++;
 459                         break;
 460                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
 461                         stats->ctrl[CONTROL_CFEND]++;
 462                         break;
 463                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
 464                         stats->ctrl[CONTROL_CFENDACK]++;
 465                         break;
 466                 }
 467         } else {
 468                 /* data */
 469                 stats->data_cnt++;
 470                 stats->data_bytes += len;
 471         }
 472 }
 473 #endif
 474
 475 int iwl_force_rf_reset(struct iwl_priv *priv, bool external)
 476 {
 477         struct iwl_rf_reset *rf_reset;
 478
 479         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 480                 return -EAGAIN;
 481
 482         if (!iwl_is_any_associated(priv)) {
 483                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
 484                 return -ENOLINK;
 485         }
 486
 487         rf_reset = &priv->rf_reset;
 488         rf_reset->reset_request_count++;
 489         if (!external && rf_reset->last_reset_jiffies &&
 490             time_after(rf_reset->last_reset_jiffies +
 491                        IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) {
 492                 IWL_DEBUG_INFO(priv, "RF reset rejected\n");
 493                 rf_reset->reset_reject_count++;
 494                 return -EAGAIN;
 495         }
 496         rf_reset->reset_success_count++;
 497         rf_reset->last_reset_jiffies = jiffies;
 498
 499         /*
 500          * There is no easy and better way to force reset the radio,
 501          * the only known method is switching channel which will force to
 502          * reset and tune the radio.
 503          * Use internal short scan (single channel) operation to should
 504          * achieve this objective.
 505          * Driver should reset the radio when number of consecutive missed
 506          * beacon, or any other uCode error condition detected.
 507          */
 508         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
 509         iwl_internal_short_hw_scan(priv);
 510         return 0;
 511 }
 512
 513
 514 int iwl_cmd_echo_test(struct iwl_priv *priv)
 515 {
 516         int ret;
 517         struct iwl_host_cmd cmd = {
 518                 .id = REPLY_ECHO,
 519                 .len = { 0 },
 520                 .flags = CMD_SYNC,
 521         };
 522
 523         ret = iwl_dvm_send_cmd(priv, &cmd);
 524         if (ret)
 525                 IWL_ERR(priv, "echo testing fail: 0X%x\n", ret);
 526         else
 527                 IWL_DEBUG_INFO(priv, "echo testing pass\n");
 528         return ret;
 529 }