drivers/net/wireless/rtlwifi/base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009-2010  Realtek Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * wlanfae <wlanfae@realtek.com>
  23  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  24  * Hsinchu 300, Taiwan.
  25  *
  26  * Larry Finger <Larry.Finger@lwfinger.net>
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/ip.h>
  31 #include "wifi.h"
  32 #include "rc.h"
  33 #include "base.h"
  34 #include "efuse.h"
  35 #include "cam.h"
  36 #include "ps.h"
  37 #include "regd.h"
  38
  39 /*
  40  *NOTICE!!!: This file will be very big, we hsould
  41  *keep it clear under follwing roles:
  42  *
  43  *This file include follwing part, so, if you add new
  44  *functions into this file, please check which part it
  45  *should includes. or check if you should add new part
  46  *for this file:
  47  *
  48  *1) mac80211 init functions
  49  *2) tx information functions
  50  *3) functions called by core.c
  51  *4) wq & timer callback functions
  52  *5) frame process functions
  53  *6) sysfs functions
  54  *7) ...
  55  */
  56
  57 /*********************************************************
  58  *
  59  * mac80211 init functions
  60  *
  61  *********************************************************/
  62 static struct ieee80211_channel rtl_channeltable[] = {
  63         {.center_freq = 2412, .hw_value = 1,},
  64         {.center_freq = 2417, .hw_value = 2,},
  65         {.center_freq = 2422, .hw_value = 3,},
  66         {.center_freq = 2427, .hw_value = 4,},
  67         {.center_freq = 2432, .hw_value = 5,},
  68         {.center_freq = 2437, .hw_value = 6,},
  69         {.center_freq = 2442, .hw_value = 7,},
  70         {.center_freq = 2447, .hw_value = 8,},
  71         {.center_freq = 2452, .hw_value = 9,},
  72         {.center_freq = 2457, .hw_value = 10,},
  73         {.center_freq = 2462, .hw_value = 11,},
  74         {.center_freq = 2467, .hw_value = 12,},
  75         {.center_freq = 2472, .hw_value = 13,},
  76         {.center_freq = 2484, .hw_value = 14,},
  77 };
  78
  79 static struct ieee80211_rate rtl_ratetable[] = {
  80         {.bitrate = 10, .hw_value = 0x00,},
  81         {.bitrate = 20, .hw_value = 0x01,},
  82         {.bitrate = 55, .hw_value = 0x02,},
  83         {.bitrate = 110, .hw_value = 0x03,},
  84         {.bitrate = 60, .hw_value = 0x04,},
  85         {.bitrate = 90, .hw_value = 0x05,},
  86         {.bitrate = 120, .hw_value = 0x06,},
  87         {.bitrate = 180, .hw_value = 0x07,},
  88         {.bitrate = 240, .hw_value = 0x08,},
  89         {.bitrate = 360, .hw_value = 0x09,},
  90         {.bitrate = 480, .hw_value = 0x0a,},
  91         {.bitrate = 540, .hw_value = 0x0b,},
  92 };
  93
  94 static const struct ieee80211_supported_band rtl_band_2ghz = {
  95         .band = IEEE80211_BAND_2GHZ,
  96
  97         .channels = rtl_channeltable,
  98         .n_channels = ARRAY_SIZE(rtl_channeltable),
  99
 100         .bitrates = rtl_ratetable,
 101         .n_bitrates = ARRAY_SIZE(rtl_ratetable),
 102
 103         .ht_cap = {0},
 104 };
 105
 106 static void _rtl_init_hw_ht_capab(struct ieee80211_hw *hw,
 107                                   struct ieee80211_sta_ht_cap *ht_cap)
 108 {
 109         struct rtl_priv *rtlpriv = rtl_priv(hw);
 110         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 111
 112         ht_cap->ht_supported = true;
 113         ht_cap->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 114             IEEE80211_HT_CAP_SGI_40 |
 115             IEEE80211_HT_CAP_SGI_20 |
 116             IEEE80211_HT_CAP_DSSSCCK40 | IEEE80211_HT_CAP_MAX_AMSDU;
 117
 118         /*
 119          *Maximum length of AMPDU that the STA can receive.
 120          *Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
 121          */
 122         ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
 123
 124         /*Minimum MPDU start spacing , */
 125         ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_16;
 126
 127         ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 128
 129         /*
 130          *hw->wiphy->bands[IEEE80211_BAND_2GHZ]
 131          *base on ant_num
 132          *rx_mask: RX mask
 133          *if rx_ant =1 rx_mask[0]=0xff;==>MCS0-MCS7
 134          *if rx_ant =2 rx_mask[1]=0xff;==>MCS8-MCS15
 135          *if rx_ant >=3 rx_mask[2]=0xff;
 136          *if BW_40 rx_mask[4]=0x01;
 137          *highest supported RX rate
 138          */
 139         if (get_rf_type(rtlphy) == RF_1T2R || get_rf_type(rtlphy) == RF_2T2R) {
 140
 141                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("1T2R or 2T2R\n"));
 142
 143                 ht_cap->mcs.rx_mask[0] = 0xFF;
 144                 ht_cap->mcs.rx_mask[1] = 0xFF;
 145                 ht_cap->mcs.rx_mask[4] = 0x01;
 146
 147                 ht_cap->mcs.rx_highest = cpu_to_le16(MAX_BIT_RATE_40MHZ_MCS15);
 148         } else if (get_rf_type(rtlphy) == RF_1T1R) {
 149
 150                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("1T1R\n"));
 151
 152                 ht_cap->mcs.rx_mask[0] = 0xFF;
 153                 ht_cap->mcs.rx_mask[1] = 0x00;
 154                 ht_cap->mcs.rx_mask[4] = 0x01;
 155
 156                 ht_cap->mcs.rx_highest = cpu_to_le16(MAX_BIT_RATE_40MHZ_MCS7);
 157         }
 158 }
 159
 160 static void _rtl_init_mac80211(struct ieee80211_hw *hw)
 161 {
 162         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 163         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
 164         struct ieee80211_supported_band *sband;
 165
 166         /* <1> use  mac->bands as mem for hw->wiphy->bands */
 167         sband = &(rtlmac->bands[IEEE80211_BAND_2GHZ]);
 168
 169         /*
 170          * <2> set hw->wiphy->bands[IEEE80211_BAND_2GHZ]
 171          * to default value(1T1R)
 172          */
 173         memcpy(&(rtlmac->bands[IEEE80211_BAND_2GHZ]), &rtl_band_2ghz,
 174                sizeof(struct ieee80211_supported_band));
 175
 176         /* <3> init ht cap base on ant_num */
 177         _rtl_init_hw_ht_capab(hw, &sband->ht_cap);
 178
 179         /* <4> set mac->sband to wiphy->sband */
 180         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
 181
 182         /* <5> set hw caps */
 183         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 184             IEEE80211_HW_RX_INCLUDES_FCS |
 185             IEEE80211_HW_BEACON_FILTER | IEEE80211_HW_AMPDU_AGGREGATION | /*PS*/
 186             /*IEEE80211_HW_SUPPORTS_PS | */
 187             /*IEEE80211_HW_PS_NULLFUNC_STACK | */
 188             /*IEEE80211_HW_SUPPORTS_DYNAMIC_PS | */
 189             IEEE80211_HW_REPORTS_TX_ACK_STATUS | 0;
 190
 191         hw->wiphy->interface_modes =
 192             BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
 193
 194         hw->wiphy->rts_threshold = 2347;
 195
 196         hw->queues = AC_MAX;
 197         hw->extra_tx_headroom = RTL_TX_HEADER_SIZE;
 198
 199         /* TODO: Correct this value for our hw */
 200         /* TODO: define these hard code value */
 201         hw->channel_change_time = 100;
 202         hw->max_listen_interval = 5;
 203         hw->max_rate_tries = 4;
 204         /* hw->max_rates = 1; */
 205
 206         /* <6> mac address */
 207         if (is_valid_ether_addr(rtlefuse->dev_addr)) {
 208                 SET_IEEE80211_PERM_ADDR(hw, rtlefuse->dev_addr);
 209         } else {
 210                 u8 rtlmac[] = { 0x00, 0xe0, 0x4c, 0x81, 0x92, 0x00 };
 211                 get_random_bytes((rtlmac + (ETH_ALEN - 1)), 1);
 212                 SET_IEEE80211_PERM_ADDR(hw, rtlmac);
 213         }
 214
 215 }
 216
 217 static void _rtl_init_deferred_work(struct ieee80211_hw *hw)
 218 {
 219         struct rtl_priv *rtlpriv = rtl_priv(hw);
 220
 221         /* <1> timer */
 222         init_timer(&rtlpriv->works.watchdog_timer);
 223         setup_timer(&rtlpriv->works.watchdog_timer,
 224                     rtl_watch_dog_timer_callback, (unsigned long)hw);
 225
 226         /* <2> work queue */
 227         rtlpriv->works.hw = hw;
 228         rtlpriv->works.rtl_wq = alloc_workqueue(rtlpriv->cfg->name, 0, 0);
 229         INIT_DELAYED_WORK(&rtlpriv->works.watchdog_wq,
 230                           (void *)rtl_watchdog_wq_callback);
 231         INIT_DELAYED_WORK(&rtlpriv->works.ips_nic_off_wq,
 232                           (void *)rtl_ips_nic_off_wq_callback);
 233
 234 }
 235
 236 void rtl_deinit_deferred_work(struct ieee80211_hw *hw)
 237 {
 238         struct rtl_priv *rtlpriv = rtl_priv(hw);
 239
 240         del_timer_sync(&rtlpriv->works.watchdog_timer);
 241
 242         cancel_delayed_work(&rtlpriv->works.watchdog_wq);
 243         cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
 244 }
 245
 246 void rtl_init_rfkill(struct ieee80211_hw *hw)
 247 {
 248         struct rtl_priv *rtlpriv = rtl_priv(hw);
 249
 250         bool radio_state;
 251         bool blocked;
 252         u8 valid = 0;
 253
 254         radio_state = rtlpriv->cfg->ops->radio_onoff_checking(hw, &valid);
 255
 256         /*set init state to that of switch */
 257         rtlpriv->rfkill.rfkill_state = radio_state;
 258         printk(KERN_INFO "rtlwifi: wireless switch is %s\n",
 259                rtlpriv->rfkill.rfkill_state ? "on" : "off");
 260
 261         if (valid) {
 262                 rtlpriv->rfkill.rfkill_state = radio_state;
 263
 264                 blocked = (rtlpriv->rfkill.rfkill_state == 1) ? 0 : 1;
 265                 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
 266         }
 267
 268         wiphy_rfkill_start_polling(hw->wiphy);
 269 }
 270
 271 void rtl_deinit_rfkill(struct ieee80211_hw *hw)
 272 {
 273         wiphy_rfkill_stop_polling(hw->wiphy);
 274 }
 275
 276 int rtl_init_core(struct ieee80211_hw *hw)
 277 {
 278         struct rtl_priv *rtlpriv = rtl_priv(hw);
 279         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 280
 281         /* <1> init mac80211 */
 282         _rtl_init_mac80211(hw);
 283         rtlmac->hw = hw;
 284
 285         /* <2> rate control register */
 286         hw->rate_control_algorithm = "rtl_rc";
 287
 288         /*
 289          * <3> init CRDA must come after init
 290          * mac80211 hw  in _rtl_init_mac80211.
 291          */
 292         if (rtl_regd_init(hw, rtl_reg_notifier)) {
 293                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("REGD init failed\n"));
 294                 return 1;
 295         } else {
 296                 /* CRDA regd hint must after init CRDA */
 297                 if (regulatory_hint(hw->wiphy, rtlpriv->regd.alpha2)) {
 298                         RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 299                                  ("regulatory_hint fail\n"));
 300                 }
 301         }
 302
 303         /* <4> locks */
 304         mutex_init(&rtlpriv->locks.conf_mutex);
 305         spin_lock_init(&rtlpriv->locks.ips_lock);
 306         spin_lock_init(&rtlpriv->locks.irq_th_lock);
 307         spin_lock_init(&rtlpriv->locks.h2c_lock);
 308         spin_lock_init(&rtlpriv->locks.rf_ps_lock);
 309         spin_lock_init(&rtlpriv->locks.rf_lock);
 310         spin_lock_init(&rtlpriv->locks.lps_lock);
 311
 312         rtlmac->link_state = MAC80211_NOLINK;
 313
 314         /* <5> init deferred work */
 315         _rtl_init_deferred_work(hw);
 316
 317         return 0;
 318 }
 319
 320 void rtl_deinit_core(struct ieee80211_hw *hw)
 321 {
 322 }
 323
 324 void rtl_init_rx_config(struct ieee80211_hw *hw)
 325 {
 326         struct rtl_priv *rtlpriv = rtl_priv(hw);
 327         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 328
 329         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *) (&mac->rx_conf));
 330         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_MGT_FILTER,
 331                                       (u8 *) (&mac->rx_mgt_filter));
 332         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_CTRL_FILTER,
 333                                       (u8 *) (&mac->rx_ctrl_filter));
 334         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_DATA_FILTER,
 335                                       (u8 *) (&mac->rx_data_filter));
 336 }
 337
 338 /*********************************************************
 339  *
 340  * tx information functions
 341  *
 342  *********************************************************/
 343 static void _rtl_qurey_shortpreamble_mode(struct ieee80211_hw *hw,
 344                                           struct rtl_tcb_desc *tcb_desc,
 345                                           struct ieee80211_tx_info *info)
 346 {
 347         struct rtl_priv *rtlpriv = rtl_priv(hw);
 348         u8 rate_flag = info->control.rates[0].flags;
 349
 350         tcb_desc->use_shortpreamble = false;
 351
 352         /* 1M can only use Long Preamble. 11B spec */
 353         if (tcb_desc->hw_rate == rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M])
 354                 return;
 355         else if (rate_flag & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 356                 tcb_desc->use_shortpreamble = true;
 357
 358         return;
 359 }
 360
 361 static void _rtl_query_shortgi(struct ieee80211_hw *hw,
 362                                struct rtl_tcb_desc *tcb_desc,
 363                                struct ieee80211_tx_info *info)
 364 {
 365         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 366         u8 rate_flag = info->control.rates[0].flags;
 367
 368         tcb_desc->use_shortgi = false;
 369
 370         if (!mac->ht_enable)
 371                 return;
 372
 373         if (!mac->sgi_40 && !mac->sgi_20)
 374                 return;
 375
 376         if ((mac->bw_40 == true) && mac->sgi_40)
 377                 tcb_desc->use_shortgi = true;
 378         else if ((mac->bw_40 == false) && mac->sgi_20)
 379                 tcb_desc->use_shortgi = true;
 380
 381         if (!(rate_flag & IEEE80211_TX_RC_SHORT_GI))
 382                 tcb_desc->use_shortgi = false;
 383
 384 }
 385
 386 static void _rtl_query_protection_mode(struct ieee80211_hw *hw,
 387                                        struct rtl_tcb_desc *tcb_desc,
 388                                        struct ieee80211_tx_info *info)
 389 {
 390         struct rtl_priv *rtlpriv = rtl_priv(hw);
 391         u8 rate_flag = info->control.rates[0].flags;
 392
 393         /* Common Settings */
 394         tcb_desc->rts_stbc = false;
 395         tcb_desc->cts_enable = false;
 396         tcb_desc->rts_sc = 0;
 397         tcb_desc->rts_bw = false;
 398         tcb_desc->rts_use_shortpreamble = false;
 399         tcb_desc->rts_use_shortgi = false;
 400
 401         if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 402                 /* Use CTS-to-SELF in protection mode. */
 403                 tcb_desc->rts_enable = true;
 404                 tcb_desc->cts_enable = true;
 405                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 406         } else if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
 407                 /* Use RTS-CTS in protection mode. */
 408                 tcb_desc->rts_enable = true;
 409                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 410         }
 411
 412 }
 413
 414 static void _rtl_txrate_selectmode(struct ieee80211_hw *hw,
 415                                    struct rtl_tcb_desc *tcb_desc)
 416 {
 417         struct rtl_priv *rtlpriv = rtl_priv(hw);
 418         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 419
 420         if (!tcb_desc->disable_ratefallback || !tcb_desc->use_driver_rate) {
 421                 if (mac->opmode == NL80211_IFTYPE_STATION)
 422                         tcb_desc->ratr_index = 0;
 423                 else if (mac->opmode == NL80211_IFTYPE_ADHOC) {
 424                         if (tcb_desc->multicast || tcb_desc->broadcast) {
 425                                 tcb_desc->hw_rate =
 426                                     rtlpriv->cfg->maps[RTL_RC_CCK_RATE2M];
 427                                 tcb_desc->use_driver_rate = 1;
 428                         } else {
 429                                 /* TODO */
 430                         }
 431                 }
 432         }
 433
 434         if (rtlpriv->dm.useramask) {
 435                 /* TODO we will differentiate adhoc and station futrue  */
 436                 tcb_desc->mac_id = 0;
 437
 438                 if ((mac->mode == WIRELESS_MODE_N_24G) ||
 439                     (mac->mode == WIRELESS_MODE_N_5G)) {
 440                         tcb_desc->ratr_index = RATR_INX_WIRELESS_NGB;
 441                 } else if (mac->mode & WIRELESS_MODE_G) {
 442                         tcb_desc->ratr_index = RATR_INX_WIRELESS_GB;
 443                 } else if (mac->mode & WIRELESS_MODE_B) {
 444                         tcb_desc->ratr_index = RATR_INX_WIRELESS_B;
 445                 }
 446         }
 447
 448 }
 449
 450 static void _rtl_query_bandwidth_mode(struct ieee80211_hw *hw,
 451                                       struct rtl_tcb_desc *tcb_desc)
 452 {
 453         struct rtl_priv *rtlpriv = rtl_priv(hw);
 454         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 455
 456         tcb_desc->packet_bw = false;
 457
 458         if (!mac->bw_40 || !mac->ht_enable)
 459                 return;
 460
 461         if (tcb_desc->multicast || tcb_desc->broadcast)
 462                 return;
 463
 464         /*use legency rate, shall use 20MHz */
 465         if (tcb_desc->hw_rate <= rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M])
 466                 return;
 467
 468         tcb_desc->packet_bw = true;
 469 }
 470
 471 static u8 _rtl_get_highest_n_rate(struct ieee80211_hw *hw)
 472 {
 473         struct rtl_priv *rtlpriv = rtl_priv(hw);
 474         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 475         u8 hw_rate;
 476
 477         if (get_rf_type(rtlphy) == RF_2T2R)
 478                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15];
 479         else
 480                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS7];
 481
 482         return hw_rate;
 483 }
 484
 485 void rtl_get_tcb_desc(struct ieee80211_hw *hw,
 486                       struct ieee80211_tx_info *info,
 487                       struct sk_buff *skb, struct rtl_tcb_desc *tcb_desc)
 488 {
 489         struct rtl_priv *rtlpriv = rtl_priv(hw);
 490         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 491         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 492         struct ieee80211_rate *txrate;
 493         __le16 fc = hdr->frame_control;
 494
 495         memset(tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 496
 497         if (ieee80211_is_data(fc)) {
 498                 txrate = ieee80211_get_tx_rate(hw, info);
 499                 tcb_desc->hw_rate = txrate->hw_value;
 500
 501                 /*
 502                  *we set data rate RTL_RC_CCK_RATE1M
 503                  *in rtl_rc.c   if skb is special data or
 504                  *mgt which need low data rate.
 505                  */
 506
 507                 /*
 508                  *So tcb_desc->hw_rate is just used for
 509                  *special data and mgt frames
 510                  */
 511                 if (tcb_desc->hw_rate < rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M]) {
 512                         tcb_desc->use_driver_rate = true;
 513                         tcb_desc->ratr_index = 7;
 514
 515                         tcb_desc->hw_rate =
 516                             rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
 517                         tcb_desc->disable_ratefallback = 1;
 518                 } else {
 519                         /*
 520                          *because hw will nerver use hw_rate
 521                          *when tcb_desc->use_driver_rate = false
 522                          *so we never set highest N rate here,
 523                          *and N rate will all be controled by FW
 524                          *when tcb_desc->use_driver_rate = false
 525                          */
 526                         if (rtlmac->ht_enable) {
 527                                 tcb_desc->hw_rate = _rtl_get_highest_n_rate(hw);
 528                         } else {
 529                                 if (rtlmac->mode == WIRELESS_MODE_B) {
 530                                         tcb_desc->hw_rate =
 531                                            rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M];
 532                                 } else {
 533                                         tcb_desc->hw_rate =
 534                                            rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M];
 535                                 }
 536                         }
 537                 }
 538
 539                 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
 540                         tcb_desc->multicast = 1;
 541                 else if (is_broadcast_ether_addr(ieee80211_get_DA(hdr)))
 542                         tcb_desc->broadcast = 1;
 543
 544                 _rtl_txrate_selectmode(hw, tcb_desc);
 545                 _rtl_query_bandwidth_mode(hw, tcb_desc);
 546                 _rtl_qurey_shortpreamble_mode(hw, tcb_desc, info);
 547                 _rtl_query_shortgi(hw, tcb_desc, info);
 548                 _rtl_query_protection_mode(hw, tcb_desc, info);
 549         } else {
 550                 tcb_desc->use_driver_rate = true;
 551                 tcb_desc->ratr_index = 7;
 552                 tcb_desc->disable_ratefallback = 1;
 553                 tcb_desc->mac_id = 0;
 554
 555                 tcb_desc->hw_rate = rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
 556         }
 557 }
 558 EXPORT_SYMBOL(rtl_get_tcb_desc);
 559
 560 bool rtl_tx_mgmt_proc(struct ieee80211_hw *hw, struct sk_buff *skb)
 561 {
 562         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 563         struct rtl_priv *rtlpriv = rtl_priv(hw);
 564         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 565         __le16 fc = hdr->frame_control;
 566
 567         if (ieee80211_is_auth(fc)) {
 568                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, ("MAC80211_LINKING\n"));
 569                 rtl_ips_nic_on(hw);
 570
 571                 mac->link_state = MAC80211_LINKING;
 572         }
 573
 574         return true;
 575 }
 576
 577 bool rtl_action_proc(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 578 {
 579         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 580         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 581         struct rtl_priv *rtlpriv = rtl_priv(hw);
 582         __le16 fc = hdr->frame_control;
 583         u8 *act = (u8 *) (((u8 *) skb->data + MAC80211_3ADDR_LEN));
 584         u8 category;
 585
 586         if (!ieee80211_is_action(fc))
 587                 return true;
 588
 589         category = *act;
 590         act++;
 591         switch (category) {
 592         case ACT_CAT_BA:
 593                 switch (*act) {
 594                 case ACT_ADDBAREQ:
 595                         if (mac->act_scanning)
 596                                 return false;
 597
 598                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 599                                  ("%s ACT_ADDBAREQ From :" MAC_FMT "\n",
 600                                   is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
 601                         break;
 602                 case ACT_ADDBARSP:
 603                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 604                                  ("%s ACT_ADDBARSP From :" MAC_FMT "\n",
 605                                   is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
 606                         break;
 607                 case ACT_DELBA:
 608                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 609                                  ("ACT_ADDBADEL From :" MAC_FMT "\n",
 610                                   MAC_ARG(hdr->addr2)));
 611                         break;
 612                 }
 613                 break;
 614         default:
 615                 break;
 616         }
 617
 618         return true;
 619 }
 620
 621 /*should call before software enc*/
 622 u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 623 {
 624         struct rtl_priv *rtlpriv = rtl_priv(hw);
 625         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 626         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 627         __le16 fc = hdr->frame_control;
 628         u16 ether_type;
 629         u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
 630         const struct iphdr *ip;
 631
 632         if (!ieee80211_is_data(fc))
 633                 goto end;
 634
 635         if (ieee80211_is_nullfunc(fc))
 636                 return true;
 637
 638         ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len +
 639                               SNAP_SIZE + PROTOC_TYPE_SIZE);
 640         ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE);
 641
 642         if (ETH_P_IP == ether_type) {
 643                 if (IPPROTO_UDP == ip->protocol) {
 644                         struct udphdr *udp = (struct udphdr *)((u8 *) ip +
 645                                                                (ip->ihl << 2));
 646                         if (((((u8 *) udp)[1] == 68) &&
 647                              (((u8 *) udp)[3] == 67)) ||
 648                             ((((u8 *) udp)[1] == 67) &&
 649                              (((u8 *) udp)[3] == 68))) {
 650                                 /*
 651                                  * 68 : UDP BOOTP client
 652                                  * 67 : UDP BOOTP server
 653                                  */
 654                                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
 655                                          DBG_DMESG, ("dhcp %s !!\n",
 656                                                      (is_tx) ? "Tx" : "Rx"));
 657
 658                                 if (is_tx) {
 659                                         rtl_lps_leave(hw);
 660                                         ppsc->last_delaylps_stamp_jiffies =
 661                                             jiffies;
 662                                 }
 663
 664                                 return true;
 665                         }
 666                 }
 667         } else if (ETH_P_ARP == ether_type) {
 668                 if (is_tx) {
 669                         rtl_lps_leave(hw);
 670                         ppsc->last_delaylps_stamp_jiffies = jiffies;
 671                 }
 672
 673                 return true;
 674         } else if (ETH_P_PAE == ether_type) {
 675                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 676                          ("802.1X %s EAPOL pkt!!\n", (is_tx) ? "Tx" : "Rx"));
 677
 678                 if (is_tx) {
 679                         rtl_lps_leave(hw);
 680                         ppsc->last_delaylps_stamp_jiffies = jiffies;
 681                 }
 682
 683                 return true;
 684         } else if (ETH_P_IPV6 == ether_type) {
 685                 /* IPv6 */
 686                 return true;
 687         }
 688
 689 end:
 690         return false;
 691 }
 692
 693 /*********************************************************
 694  *
 695  * functions called by core.c
 696  *
 697  *********************************************************/
 698 int rtl_tx_agg_start(struct ieee80211_hw *hw, const u8 *ra, u16 tid, u16 *ssn)
 699 {
 700         struct rtl_priv *rtlpriv = rtl_priv(hw);
 701         struct rtl_tid_data *tid_data;
 702         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 703
 704         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
 705                  ("on ra = %pM tid = %d\n", ra, tid));
 706
 707         if (unlikely(tid >= MAX_TID_COUNT))
 708                 return -EINVAL;
 709
 710         if (mac->tids[tid].agg.agg_state != RTL_AGG_OFF) {
 711                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 712                          ("Start AGG when state is not RTL_AGG_OFF !\n"));
 713                 return -ENXIO;
 714         }
 715
 716         tid_data = &mac->tids[tid];
 717         *ssn = SEQ_TO_SN(tid_data->seq_number);
 718
 719         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
 720                  ("HW queue is empty tid:%d\n", tid));
 721         tid_data->agg.agg_state = RTL_AGG_ON;
 722
 723         ieee80211_start_tx_ba_cb_irqsafe(mac->vif, ra, tid);
 724
 725         return 0;
 726 }
 727
 728 int rtl_tx_agg_stop(struct ieee80211_hw *hw, const u8 * ra, u16 tid)
 729 {
 730         int ssn = -1;
 731         struct rtl_priv *rtlpriv = rtl_priv(hw);
 732         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 733         struct rtl_tid_data *tid_data;
 734
 735         if (!ra) {
 736                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("ra = NULL\n"));
 737                 return -EINVAL;
 738         }
 739
 740         if (unlikely(tid >= MAX_TID_COUNT))
 741                 return -EINVAL;
 742
 743         if (mac->tids[tid].agg.agg_state != RTL_AGG_ON)
 744                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 745                          ("Stopping AGG while state not ON or starting\n"));
 746
 747         tid_data = &mac->tids[tid];
 748         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
 749
 750         mac->tids[tid].agg.agg_state = RTL_AGG_OFF;
 751
 752         ieee80211_stop_tx_ba_cb_irqsafe(mac->vif, ra, tid);
 753
 754         return 0;
 755 }
 756
 757 /*********************************************************
 758  *
 759  * wq & timer callback functions
 760  *
 761  *********************************************************/
 762 void rtl_watchdog_wq_callback(void *data)
 763 {
 764         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
 765                                                             struct rtl_works,
 766                                                             watchdog_wq);
 767         struct ieee80211_hw *hw = rtlworks->hw;
 768         struct rtl_priv *rtlpriv = rtl_priv(hw);
 769         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 770         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 771
 772         bool busytraffic = false;
 773         bool higher_busytraffic = false;
 774         bool higher_busyrxtraffic = false;
 775         bool higher_busytxtraffic = false;
 776
 777         u8 idx = 0;
 778         u32 rx_cnt_inp4eriod = 0;
 779         u32 tx_cnt_inp4eriod = 0;
 780         u32 aver_rx_cnt_inperiod = 0;
 781         u32 aver_tx_cnt_inperiod = 0;
 782
 783         bool enter_ps = false;
 784
 785         if (is_hal_stop(rtlhal))
 786                 return;
 787
 788         /* <1> Determine if action frame is allowed */
 789         if (mac->link_state > MAC80211_NOLINK) {
 790                 if (mac->cnt_after_linked < 20)
 791                         mac->cnt_after_linked++;
 792         } else {
 793                 mac->cnt_after_linked = 0;
 794         }
 795
 796         /* <2> DM */
 797         rtlpriv->cfg->ops->dm_watchdog(hw);
 798
 799         /*
 800          *<3> to check if traffic busy, if
 801          * busytraffic we don't change channel
 802          */
 803         if (mac->link_state >= MAC80211_LINKED) {
 804
 805                 /* (1) get aver_rx_cnt_inperiod & aver_tx_cnt_inperiod */
 806                 for (idx = 0; idx <= 2; idx++) {
 807                         rtlpriv->link_info.num_rx_in4period[idx] =
 808                             rtlpriv->link_info.num_rx_in4period[idx + 1];
 809                         rtlpriv->link_info.num_tx_in4period[idx] =
 810                             rtlpriv->link_info.num_tx_in4period[idx + 1];
 811                 }
 812                 rtlpriv->link_info.num_rx_in4period[3] =
 813                     rtlpriv->link_info.num_rx_inperiod;
 814                 rtlpriv->link_info.num_tx_in4period[3] =
 815                     rtlpriv->link_info.num_tx_inperiod;
 816                 for (idx = 0; idx <= 3; idx++) {
 817                         rx_cnt_inp4eriod +=
 818                             rtlpriv->link_info.num_rx_in4period[idx];
 819                         tx_cnt_inp4eriod +=
 820                             rtlpriv->link_info.num_tx_in4period[idx];
 821                 }
 822                 aver_rx_cnt_inperiod = rx_cnt_inp4eriod / 4;
 823                 aver_tx_cnt_inperiod = tx_cnt_inp4eriod / 4;
 824
 825                 /* (2) check traffic busy */
 826                 if (aver_rx_cnt_inperiod > 100 || aver_tx_cnt_inperiod > 100)
 827                         busytraffic = true;
 828
 829                 /* Higher Tx/Rx data. */
 830                 if (aver_rx_cnt_inperiod > 4000 ||
 831                     aver_tx_cnt_inperiod > 4000) {
 832                         higher_busytraffic = true;
 833
 834                         /* Extremely high Rx data. */
 835                         if (aver_rx_cnt_inperiod > 5000)
 836                                 higher_busyrxtraffic = true;
 837                         else
 838                                 higher_busytxtraffic = false;
 839                 }
 840
 841                 if (((rtlpriv->link_info.num_rx_inperiod +
 842                       rtlpriv->link_info.num_tx_inperiod) > 8) ||
 843                     (rtlpriv->link_info.num_rx_inperiod > 2))
 844                         enter_ps = false;
 845                 else
 846                         enter_ps = true;
 847
 848                 /* LeisurePS only work in infra mode. */
 849                 if (enter_ps)
 850                         rtl_lps_enter(hw);
 851                 else
 852                         rtl_lps_leave(hw);
 853         }
 854
 855         rtlpriv->link_info.num_rx_inperiod = 0;
 856         rtlpriv->link_info.num_tx_inperiod = 0;
 857
 858         rtlpriv->link_info.busytraffic = busytraffic;
 859         rtlpriv->link_info.higher_busytraffic = higher_busytraffic;
 860         rtlpriv->link_info.higher_busyrxtraffic = higher_busyrxtraffic;
 861
 862 }
 863
 864 void rtl_watch_dog_timer_callback(unsigned long data)
 865 {
 866         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
 867         struct rtl_priv *rtlpriv = rtl_priv(hw);
 868
 869         queue_delayed_work(rtlpriv->works.rtl_wq,
 870                            &rtlpriv->works.watchdog_wq, 0);
 871
 872         mod_timer(&rtlpriv->works.watchdog_timer,
 873                   jiffies + MSECS(RTL_WATCH_DOG_TIME));
 874 }
 875
 876 /*********************************************************
 877  *
 878  * sysfs functions
 879  *
 880  *********************************************************/
 881 static ssize_t rtl_show_debug_level(struct device *d,
 882                                     struct device_attribute *attr, char *buf)
 883 {
 884         struct ieee80211_hw *hw = dev_get_drvdata(d);
 885         struct rtl_priv *rtlpriv = rtl_priv(hw);
 886
 887         return sprintf(buf, "0x%08X\n", rtlpriv->dbg.global_debuglevel);
 888 }
 889
 890 static ssize_t rtl_store_debug_level(struct device *d,
 891                                      struct device_attribute *attr,
 892                                      const char *buf, size_t count)
 893 {
 894         struct ieee80211_hw *hw = dev_get_drvdata(d);
 895         struct rtl_priv *rtlpriv = rtl_priv(hw);
 896         unsigned long val;
 897         int ret;
 898
 899         ret = strict_strtoul(buf, 0, &val);
 900         if (ret) {
 901                 printk(KERN_DEBUG "%s is not in hex or decimal form.\n", buf);
 902         } else {
 903                 rtlpriv->dbg.global_debuglevel = val;
 904                 printk(KERN_DEBUG "debuglevel:%x\n",
 905                        rtlpriv->dbg.global_debuglevel);
 906         }
 907
 908         return strnlen(buf, count);
 909 }
 910
 911 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
 912                    rtl_show_debug_level, rtl_store_debug_level);
 913
 914 static struct attribute *rtl_sysfs_entries[] = {
 915
 916         &dev_attr_debug_level.attr,
 917
 918         NULL
 919 };
 920
 921 /*
 922  * "name" is folder name witch will be
 923  * put in device directory like :
 924  * sys/devices/pci0000:00/0000:00:1c.4/
 925  * 0000:06:00.0/rtl_sysfs
 926  */
 927 struct attribute_group rtl_attribute_group = {
 928         .name = "rtlsysfs",
 929         .attrs = rtl_sysfs_entries,
 930 };
 931
 932 MODULE_AUTHOR("lizhaoming       <chaoming_li@realsil.com.cn>");
 933 MODULE_AUTHOR("Realtek WlanFAE  <wlanfae@realtek.com>");
 934 MODULE_AUTHOR("Larry Finger     <Larry.FInger@lwfinger.net>");
 935 MODULE_LICENSE("GPL");
 936 MODULE_DESCRIPTION("Realtek 802.11n PCI wireless core");
 937
 938 static int __init rtl_core_module_init(void)
 939 {
 940         if (rtl_rate_control_register())
 941                 printk(KERN_ERR "rtlwifi: Unable to register rtl_rc,"
 942                        "use default RC !!\n");
 943         return 0;
 944 }
 945
 946 static void __exit rtl_core_module_exit(void)
 947 {
 948          /*RC*/
 949         rtl_rate_control_unregister();
 950 }
 951
 952 module_init(rtl_core_module_init);
 953 module_exit(rtl_core_module_exit);