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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/ip.h>
  33 #include <linux/module.h>
  34 #include "wifi.h"
  35 #include "rc.h"
  36 #include "base.h"
  37 #include "efuse.h"
  38 #include "cam.h"
  39 #include "ps.h"
  40 #include "regd.h"
  41
  42 /*
  43  *NOTICE!!!: This file will be very big, we hsould
  44  *keep it clear under follwing roles:
  45  *
  46  *This file include follwing part, so, if you add new
  47  *functions into this file, please check which part it
  48  *should includes. or check if you should add new part
  49  *for this file:
  50  *
  51  *1) mac80211 init functions
  52  *2) tx information functions
  53  *3) functions called by core.c
  54  *4) wq & timer callback functions
  55  *5) frame process functions
  56  *6) IOT functions
  57  *7) sysfs functions
  58  *8) ...
  59  */
  60
  61 /*********************************************************
  62  *
  63  * mac80211 init functions
  64  *
  65  *********************************************************/
  66 static struct ieee80211_channel rtl_channeltable_2g[] = {
  67         {.center_freq = 2412, .hw_value = 1,},
  68         {.center_freq = 2417, .hw_value = 2,},
  69         {.center_freq = 2422, .hw_value = 3,},
  70         {.center_freq = 2427, .hw_value = 4,},
  71         {.center_freq = 2432, .hw_value = 5,},
  72         {.center_freq = 2437, .hw_value = 6,},
  73         {.center_freq = 2442, .hw_value = 7,},
  74         {.center_freq = 2447, .hw_value = 8,},
  75         {.center_freq = 2452, .hw_value = 9,},
  76         {.center_freq = 2457, .hw_value = 10,},
  77         {.center_freq = 2462, .hw_value = 11,},
  78         {.center_freq = 2467, .hw_value = 12,},
  79         {.center_freq = 2472, .hw_value = 13,},
  80         {.center_freq = 2484, .hw_value = 14,},
  81 };
  82
  83 static struct ieee80211_channel rtl_channeltable_5g[] = {
  84         {.center_freq = 5180, .hw_value = 36,},
  85         {.center_freq = 5200, .hw_value = 40,},
  86         {.center_freq = 5220, .hw_value = 44,},
  87         {.center_freq = 5240, .hw_value = 48,},
  88         {.center_freq = 5260, .hw_value = 52,},
  89         {.center_freq = 5280, .hw_value = 56,},
  90         {.center_freq = 5300, .hw_value = 60,},
  91         {.center_freq = 5320, .hw_value = 64,},
  92         {.center_freq = 5500, .hw_value = 100,},
  93         {.center_freq = 5520, .hw_value = 104,},
  94         {.center_freq = 5540, .hw_value = 108,},
  95         {.center_freq = 5560, .hw_value = 112,},
  96         {.center_freq = 5580, .hw_value = 116,},
  97         {.center_freq = 5600, .hw_value = 120,},
  98         {.center_freq = 5620, .hw_value = 124,},
  99         {.center_freq = 5640, .hw_value = 128,},
 100         {.center_freq = 5660, .hw_value = 132,},
 101         {.center_freq = 5680, .hw_value = 136,},
 102         {.center_freq = 5700, .hw_value = 140,},
 103         {.center_freq = 5745, .hw_value = 149,},
 104         {.center_freq = 5765, .hw_value = 153,},
 105         {.center_freq = 5785, .hw_value = 157,},
 106         {.center_freq = 5805, .hw_value = 161,},
 107         {.center_freq = 5825, .hw_value = 165,},
 108 };
 109
 110 static struct ieee80211_rate rtl_ratetable_2g[] = {
 111         {.bitrate = 10, .hw_value = 0x00,},
 112         {.bitrate = 20, .hw_value = 0x01,},
 113         {.bitrate = 55, .hw_value = 0x02,},
 114         {.bitrate = 110, .hw_value = 0x03,},
 115         {.bitrate = 60, .hw_value = 0x04,},
 116         {.bitrate = 90, .hw_value = 0x05,},
 117         {.bitrate = 120, .hw_value = 0x06,},
 118         {.bitrate = 180, .hw_value = 0x07,},
 119         {.bitrate = 240, .hw_value = 0x08,},
 120         {.bitrate = 360, .hw_value = 0x09,},
 121         {.bitrate = 480, .hw_value = 0x0a,},
 122         {.bitrate = 540, .hw_value = 0x0b,},
 123 };
 124
 125 static struct ieee80211_rate rtl_ratetable_5g[] = {
 126         {.bitrate = 60, .hw_value = 0x04,},
 127         {.bitrate = 90, .hw_value = 0x05,},
 128         {.bitrate = 120, .hw_value = 0x06,},
 129         {.bitrate = 180, .hw_value = 0x07,},
 130         {.bitrate = 240, .hw_value = 0x08,},
 131         {.bitrate = 360, .hw_value = 0x09,},
 132         {.bitrate = 480, .hw_value = 0x0a,},
 133         {.bitrate = 540, .hw_value = 0x0b,},
 134 };
 135
 136 static const struct ieee80211_supported_band rtl_band_2ghz = {
 137         .band = IEEE80211_BAND_2GHZ,
 138
 139         .channels = rtl_channeltable_2g,
 140         .n_channels = ARRAY_SIZE(rtl_channeltable_2g),
 141
 142         .bitrates = rtl_ratetable_2g,
 143         .n_bitrates = ARRAY_SIZE(rtl_ratetable_2g),
 144
 145         .ht_cap = {0},
 146 };
 147
 148 static struct ieee80211_supported_band rtl_band_5ghz = {
 149         .band = IEEE80211_BAND_5GHZ,
 150
 151         .channels = rtl_channeltable_5g,
 152         .n_channels = ARRAY_SIZE(rtl_channeltable_5g),
 153
 154         .bitrates = rtl_ratetable_5g,
 155         .n_bitrates = ARRAY_SIZE(rtl_ratetable_5g),
 156
 157         .ht_cap = {0},
 158 };
 159
 160 static const u8 tid_to_ac[] = {
 161         2, /* IEEE80211_AC_BE */
 162         3, /* IEEE80211_AC_BK */
 163         3, /* IEEE80211_AC_BK */
 164         2, /* IEEE80211_AC_BE */
 165         1, /* IEEE80211_AC_VI */
 166         1, /* IEEE80211_AC_VI */
 167         0, /* IEEE80211_AC_VO */
 168         0, /* IEEE80211_AC_VO */
 169 };
 170
 171 u8 rtl_tid_to_ac(struct ieee80211_hw *hw, u8 tid)
 172 {
 173         return tid_to_ac[tid];
 174 }
 175
 176 static void _rtl_init_hw_ht_capab(struct ieee80211_hw *hw,
 177                                   struct ieee80211_sta_ht_cap *ht_cap)
 178 {
 179         struct rtl_priv *rtlpriv = rtl_priv(hw);
 180         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 181
 182         ht_cap->ht_supported = true;
 183         ht_cap->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 184             IEEE80211_HT_CAP_SGI_40 |
 185             IEEE80211_HT_CAP_SGI_20 |
 186             IEEE80211_HT_CAP_DSSSCCK40 | IEEE80211_HT_CAP_MAX_AMSDU;
 187
 188         if (rtlpriv->rtlhal.disable_amsdu_8k)
 189                 ht_cap->cap &= ~IEEE80211_HT_CAP_MAX_AMSDU;
 190
 191         /*
 192          *Maximum length of AMPDU that the STA can receive.
 193          *Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
 194          */
 195         ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
 196
 197         /*Minimum MPDU start spacing , */
 198         ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_16;
 199
 200         ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 201
 202         /*
 203          *hw->wiphy->bands[IEEE80211_BAND_2GHZ]
 204          *base on ant_num
 205          *rx_mask: RX mask
 206          *if rx_ant =1 rx_mask[0]=0xff;==>MCS0-MCS7
 207          *if rx_ant =2 rx_mask[1]=0xff;==>MCS8-MCS15
 208          *if rx_ant >=3 rx_mask[2]=0xff;
 209          *if BW_40 rx_mask[4]=0x01;
 210          *highest supported RX rate
 211          */
 212         if (get_rf_type(rtlphy) == RF_1T2R || get_rf_type(rtlphy) == RF_2T2R) {
 213
 214                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("1T2R or 2T2R\n"));
 215
 216                 ht_cap->mcs.rx_mask[0] = 0xFF;
 217                 ht_cap->mcs.rx_mask[1] = 0xFF;
 218                 ht_cap->mcs.rx_mask[4] = 0x01;
 219
 220                 ht_cap->mcs.rx_highest = cpu_to_le16(MAX_BIT_RATE_40MHZ_MCS15);
 221         } else if (get_rf_type(rtlphy) == RF_1T1R) {
 222
 223                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("1T1R\n"));
 224
 225                 ht_cap->mcs.rx_mask[0] = 0xFF;
 226                 ht_cap->mcs.rx_mask[1] = 0x00;
 227                 ht_cap->mcs.rx_mask[4] = 0x01;
 228
 229                 ht_cap->mcs.rx_highest = cpu_to_le16(MAX_BIT_RATE_40MHZ_MCS7);
 230         }
 231 }
 232
 233 static void _rtl_init_mac80211(struct ieee80211_hw *hw)
 234 {
 235         struct rtl_priv *rtlpriv = rtl_priv(hw);
 236         struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
 237         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 238         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
 239         struct ieee80211_supported_band *sband;
 240
 241
 242         if (rtlhal->macphymode == SINGLEMAC_SINGLEPHY && rtlhal->bandset ==
 243             BAND_ON_BOTH) {
 244                 /* 1: 2.4 G bands */
 245                 /* <1> use  mac->bands as mem for hw->wiphy->bands */
 246                 sband = &(rtlmac->bands[IEEE80211_BAND_2GHZ]);
 247
 248                 /* <2> set hw->wiphy->bands[IEEE80211_BAND_2GHZ]
 249                  * to default value(1T1R) */
 250                 memcpy(&(rtlmac->bands[IEEE80211_BAND_2GHZ]), &rtl_band_2ghz,
 251                                 sizeof(struct ieee80211_supported_band));
 252
 253                 /* <3> init ht cap base on ant_num */
 254                 _rtl_init_hw_ht_capab(hw, &sband->ht_cap);
 255
 256                 /* <4> set mac->sband to wiphy->sband */
 257                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
 258
 259                 /* 2: 5 G bands */
 260                 /* <1> use  mac->bands as mem for hw->wiphy->bands */
 261                 sband = &(rtlmac->bands[IEEE80211_BAND_5GHZ]);
 262
 263                 /* <2> set hw->wiphy->bands[IEEE80211_BAND_5GHZ]
 264                  * to default value(1T1R) */
 265                 memcpy(&(rtlmac->bands[IEEE80211_BAND_5GHZ]), &rtl_band_5ghz,
 266                                 sizeof(struct ieee80211_supported_band));
 267
 268                 /* <3> init ht cap base on ant_num */
 269                 _rtl_init_hw_ht_capab(hw, &sband->ht_cap);
 270
 271                 /* <4> set mac->sband to wiphy->sband */
 272                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
 273         } else {
 274                 if (rtlhal->current_bandtype == BAND_ON_2_4G) {
 275                         /* <1> use  mac->bands as mem for hw->wiphy->bands */
 276                         sband = &(rtlmac->bands[IEEE80211_BAND_2GHZ]);
 277
 278                         /* <2> set hw->wiphy->bands[IEEE80211_BAND_2GHZ]
 279                          * to default value(1T1R) */
 280                         memcpy(&(rtlmac->bands[IEEE80211_BAND_2GHZ]),
 281                                  &rtl_band_2ghz,
 282                                  sizeof(struct ieee80211_supported_band));
 283
 284                         /* <3> init ht cap base on ant_num */
 285                         _rtl_init_hw_ht_capab(hw, &sband->ht_cap);
 286
 287                         /* <4> set mac->sband to wiphy->sband */
 288                         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
 289                 } else if (rtlhal->current_bandtype == BAND_ON_5G) {
 290                         /* <1> use  mac->bands as mem for hw->wiphy->bands */
 291                         sband = &(rtlmac->bands[IEEE80211_BAND_5GHZ]);
 292
 293                         /* <2> set hw->wiphy->bands[IEEE80211_BAND_5GHZ]
 294                          * to default value(1T1R) */
 295                         memcpy(&(rtlmac->bands[IEEE80211_BAND_5GHZ]),
 296                                  &rtl_band_5ghz,
 297                                  sizeof(struct ieee80211_supported_band));
 298
 299                         /* <3> init ht cap base on ant_num */
 300                         _rtl_init_hw_ht_capab(hw, &sband->ht_cap);
 301
 302                         /* <4> set mac->sband to wiphy->sband */
 303                         hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
 304                 } else {
 305                         RT_TRACE(rtlpriv, COMP_INIT, DBG_EMERG,
 306                                  ("Err BAND %d\n",
 307                                  rtlhal->current_bandtype));
 308                 }
 309         }
 310         /* <5> set hw caps */
 311         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 312             IEEE80211_HW_RX_INCLUDES_FCS |
 313             IEEE80211_HW_BEACON_FILTER |
 314             IEEE80211_HW_AMPDU_AGGREGATION |
 315             IEEE80211_HW_CONNECTION_MONITOR |
 316             /* IEEE80211_HW_SUPPORTS_CQM_RSSI | */
 317             IEEE80211_HW_REPORTS_TX_ACK_STATUS | 0;
 318
 319         /* swlps or hwlps has been set in diff chip in init_sw_vars */
 320         if (rtlpriv->psc.swctrl_lps)
 321                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
 322                         IEEE80211_HW_PS_NULLFUNC_STACK |
 323                         /* IEEE80211_HW_SUPPORTS_DYNAMIC_PS | */
 324                         0;
 325
 326         hw->wiphy->interface_modes =
 327             BIT(NL80211_IFTYPE_AP) |
 328             BIT(NL80211_IFTYPE_STATION) |
 329             BIT(NL80211_IFTYPE_ADHOC);
 330
 331         hw->wiphy->rts_threshold = 2347;
 332
 333         hw->queues = AC_MAX;
 334         hw->extra_tx_headroom = RTL_TX_HEADER_SIZE;
 335
 336         /* TODO: Correct this value for our hw */
 337         /* TODO: define these hard code value */
 338         hw->channel_change_time = 100;
 339         hw->max_listen_interval = 10;
 340         hw->max_rate_tries = 4;
 341         /* hw->max_rates = 1; */
 342         hw->sta_data_size = sizeof(struct rtl_sta_info);
 343
 344         /* <6> mac address */
 345         if (is_valid_ether_addr(rtlefuse->dev_addr)) {
 346                 SET_IEEE80211_PERM_ADDR(hw, rtlefuse->dev_addr);
 347         } else {
 348                 u8 rtlmac1[] = { 0x00, 0xe0, 0x4c, 0x81, 0x92, 0x00 };
 349                 get_random_bytes((rtlmac1 + (ETH_ALEN - 1)), 1);
 350                 SET_IEEE80211_PERM_ADDR(hw, rtlmac1);
 351         }
 352
 353 }
 354
 355 static void _rtl_init_deferred_work(struct ieee80211_hw *hw)
 356 {
 357         struct rtl_priv *rtlpriv = rtl_priv(hw);
 358
 359         /* <1> timer */
 360         init_timer(&rtlpriv->works.watchdog_timer);
 361         setup_timer(&rtlpriv->works.watchdog_timer,
 362                     rtl_watch_dog_timer_callback, (unsigned long)hw);
 363
 364         /* <2> work queue */
 365         rtlpriv->works.hw = hw;
 366         rtlpriv->works.rtl_wq = alloc_workqueue(rtlpriv->cfg->name, 0, 0);
 367         INIT_DELAYED_WORK(&rtlpriv->works.watchdog_wq,
 368                           (void *)rtl_watchdog_wq_callback);
 369         INIT_DELAYED_WORK(&rtlpriv->works.ips_nic_off_wq,
 370                           (void *)rtl_ips_nic_off_wq_callback);
 371         INIT_DELAYED_WORK(&rtlpriv->works.ps_work,
 372                           (void *)rtl_swlps_wq_callback);
 373         INIT_DELAYED_WORK(&rtlpriv->works.ps_rfon_wq,
 374                           (void *)rtl_swlps_rfon_wq_callback);
 375
 376 }
 377
 378 void rtl_deinit_deferred_work(struct ieee80211_hw *hw)
 379 {
 380         struct rtl_priv *rtlpriv = rtl_priv(hw);
 381
 382         del_timer_sync(&rtlpriv->works.watchdog_timer);
 383
 384         cancel_delayed_work(&rtlpriv->works.watchdog_wq);
 385         cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
 386         cancel_delayed_work(&rtlpriv->works.ps_work);
 387         cancel_delayed_work(&rtlpriv->works.ps_rfon_wq);
 388 }
 389
 390 void rtl_init_rfkill(struct ieee80211_hw *hw)
 391 {
 392         struct rtl_priv *rtlpriv = rtl_priv(hw);
 393
 394         bool radio_state;
 395         bool blocked;
 396         u8 valid = 0;
 397
 398         /*set init state to on */
 399         rtlpriv->rfkill.rfkill_state = 1;
 400         wiphy_rfkill_set_hw_state(hw->wiphy, 0);
 401
 402         radio_state = rtlpriv->cfg->ops->radio_onoff_checking(hw, &valid);
 403
 404         if (valid) {
 405                 pr_info("wireless switch is %s\n",
 406                         rtlpriv->rfkill.rfkill_state ? "on" : "off");
 407
 408                 rtlpriv->rfkill.rfkill_state = radio_state;
 409
 410                 blocked = (rtlpriv->rfkill.rfkill_state == 1) ? 0 : 1;
 411                 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
 412         }
 413
 414         wiphy_rfkill_start_polling(hw->wiphy);
 415 }
 416
 417 void rtl_deinit_rfkill(struct ieee80211_hw *hw)
 418 {
 419         wiphy_rfkill_stop_polling(hw->wiphy);
 420 }
 421
 422 int rtl_init_core(struct ieee80211_hw *hw)
 423 {
 424         struct rtl_priv *rtlpriv = rtl_priv(hw);
 425         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 426
 427         /* <1> init mac80211 */
 428         _rtl_init_mac80211(hw);
 429         rtlmac->hw = hw;
 430
 431         /* <2> rate control register */
 432         hw->rate_control_algorithm = "rtl_rc";
 433
 434         /*
 435          * <3> init CRDA must come after init
 436          * mac80211 hw  in _rtl_init_mac80211.
 437          */
 438         if (rtl_regd_init(hw, rtl_reg_notifier)) {
 439                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("REGD init failed\n"));
 440                 return 1;
 441         } else {
 442                 /* CRDA regd hint must after init CRDA */
 443                 if (regulatory_hint(hw->wiphy, rtlpriv->regd.alpha2)) {
 444                         RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 445                                  ("regulatory_hint fail\n"));
 446                 }
 447         }
 448
 449         /* <4> locks */
 450         mutex_init(&rtlpriv->locks.conf_mutex);
 451         mutex_init(&rtlpriv->locks.ps_mutex);
 452         spin_lock_init(&rtlpriv->locks.irq_th_lock);
 453         spin_lock_init(&rtlpriv->locks.h2c_lock);
 454         spin_lock_init(&rtlpriv->locks.rf_ps_lock);
 455         spin_lock_init(&rtlpriv->locks.rf_lock);
 456         spin_lock_init(&rtlpriv->locks.waitq_lock);
 457         spin_lock_init(&rtlpriv->locks.cck_and_rw_pagea_lock);
 458
 459         rtlmac->link_state = MAC80211_NOLINK;
 460
 461         /* <5> init deferred work */
 462         _rtl_init_deferred_work(hw);
 463
 464         return 0;
 465 }
 466
 467 void rtl_deinit_core(struct ieee80211_hw *hw)
 468 {
 469 }
 470
 471 void rtl_init_rx_config(struct ieee80211_hw *hw)
 472 {
 473         struct rtl_priv *rtlpriv = rtl_priv(hw);
 474         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 475
 476         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *) (&mac->rx_conf));
 477 }
 478
 479 /*********************************************************
 480  *
 481  * tx information functions
 482  *
 483  *********************************************************/
 484 static void _rtl_qurey_shortpreamble_mode(struct ieee80211_hw *hw,
 485                                           struct rtl_tcb_desc *tcb_desc,
 486                                           struct ieee80211_tx_info *info)
 487 {
 488         struct rtl_priv *rtlpriv = rtl_priv(hw);
 489         u8 rate_flag = info->control.rates[0].flags;
 490
 491         tcb_desc->use_shortpreamble = false;
 492
 493         /* 1M can only use Long Preamble. 11B spec */
 494         if (tcb_desc->hw_rate == rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M])
 495                 return;
 496         else if (rate_flag & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 497                 tcb_desc->use_shortpreamble = true;
 498
 499         return;
 500 }
 501
 502 static void _rtl_query_shortgi(struct ieee80211_hw *hw,
 503                                struct ieee80211_sta *sta,
 504                                struct rtl_tcb_desc *tcb_desc,
 505                                struct ieee80211_tx_info *info)
 506 {
 507         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 508         u8 rate_flag = info->control.rates[0].flags;
 509         u8 sgi_40 = 0, sgi_20 = 0, bw_40 = 0;
 510         tcb_desc->use_shortgi = false;
 511
 512         if (sta == NULL)
 513                 return;
 514
 515         sgi_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40;
 516         sgi_20 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20;
 517
 518         if (!(sta->ht_cap.ht_supported))
 519                 return;
 520
 521         if (!sgi_40 && !sgi_20)
 522                 return;
 523
 524         if (mac->opmode == NL80211_IFTYPE_STATION)
 525                 bw_40 = mac->bw_40;
 526         else if (mac->opmode == NL80211_IFTYPE_AP ||
 527                 mac->opmode == NL80211_IFTYPE_ADHOC)
 528                 bw_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 529
 530         if (bw_40 && sgi_40)
 531                 tcb_desc->use_shortgi = true;
 532         else if ((bw_40 == false) && sgi_20)
 533                 tcb_desc->use_shortgi = true;
 534
 535         if (!(rate_flag & IEEE80211_TX_RC_SHORT_GI))
 536                 tcb_desc->use_shortgi = false;
 537 }
 538
 539 static void _rtl_query_protection_mode(struct ieee80211_hw *hw,
 540                                        struct rtl_tcb_desc *tcb_desc,
 541                                        struct ieee80211_tx_info *info)
 542 {
 543         struct rtl_priv *rtlpriv = rtl_priv(hw);
 544         u8 rate_flag = info->control.rates[0].flags;
 545
 546         /* Common Settings */
 547         tcb_desc->rts_stbc = false;
 548         tcb_desc->cts_enable = false;
 549         tcb_desc->rts_sc = 0;
 550         tcb_desc->rts_bw = false;
 551         tcb_desc->rts_use_shortpreamble = false;
 552         tcb_desc->rts_use_shortgi = false;
 553
 554         if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 555                 /* Use CTS-to-SELF in protection mode. */
 556                 tcb_desc->rts_enable = true;
 557                 tcb_desc->cts_enable = true;
 558                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 559         } else if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
 560                 /* Use RTS-CTS in protection mode. */
 561                 tcb_desc->rts_enable = true;
 562                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 563         }
 564 }
 565
 566 static void _rtl_txrate_selectmode(struct ieee80211_hw *hw,
 567                                    struct ieee80211_sta *sta,
 568                                    struct rtl_tcb_desc *tcb_desc)
 569 {
 570         struct rtl_priv *rtlpriv = rtl_priv(hw);
 571         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 572         struct rtl_sta_info *sta_entry = NULL;
 573         u8 ratr_index = 7;
 574
 575         if (sta) {
 576                 sta_entry = (struct rtl_sta_info *) sta->drv_priv;
 577                 ratr_index = sta_entry->ratr_index;
 578         }
 579         if (!tcb_desc->disable_ratefallback || !tcb_desc->use_driver_rate) {
 580                 if (mac->opmode == NL80211_IFTYPE_STATION) {
 581                         tcb_desc->ratr_index = 0;
 582                 } else if (mac->opmode == NL80211_IFTYPE_ADHOC) {
 583                         if (tcb_desc->multicast || tcb_desc->broadcast) {
 584                                 tcb_desc->hw_rate =
 585                                     rtlpriv->cfg->maps[RTL_RC_CCK_RATE2M];
 586                                 tcb_desc->use_driver_rate = 1;
 587                         } else {
 588                                 /* TODO */
 589                         }
 590                         tcb_desc->ratr_index = ratr_index;
 591                 } else if (mac->opmode == NL80211_IFTYPE_AP) {
 592                         tcb_desc->ratr_index = ratr_index;
 593                 }
 594         }
 595
 596         if (rtlpriv->dm.useramask) {
 597                 /* TODO we will differentiate adhoc and station futrue  */
 598                 if (mac->opmode == NL80211_IFTYPE_STATION) {
 599                         tcb_desc->mac_id = 0;
 600
 601                         if (mac->mode == WIRELESS_MODE_N_24G)
 602                                 tcb_desc->ratr_index = RATR_INX_WIRELESS_NGB;
 603                         else if (mac->mode == WIRELESS_MODE_N_5G)
 604                                 tcb_desc->ratr_index = RATR_INX_WIRELESS_NG;
 605                         else if (mac->mode & WIRELESS_MODE_G)
 606                                 tcb_desc->ratr_index = RATR_INX_WIRELESS_GB;
 607                         else if (mac->mode & WIRELESS_MODE_B)
 608                                 tcb_desc->ratr_index = RATR_INX_WIRELESS_B;
 609                         else if (mac->mode & WIRELESS_MODE_A)
 610                                 tcb_desc->ratr_index = RATR_INX_WIRELESS_G;
 611                 } else if (mac->opmode == NL80211_IFTYPE_AP ||
 612                         mac->opmode == NL80211_IFTYPE_ADHOC) {
 613                         if (NULL != sta) {
 614                                 if (sta->aid > 0)
 615                                         tcb_desc->mac_id = sta->aid + 1;
 616                                 else
 617                                         tcb_desc->mac_id = 1;
 618                         } else {
 619                                 tcb_desc->mac_id = 0;
 620                         }
 621                 }
 622         }
 623
 624 }
 625
 626 static void _rtl_query_bandwidth_mode(struct ieee80211_hw *hw,
 627                                       struct ieee80211_sta *sta,
 628                                       struct rtl_tcb_desc *tcb_desc)
 629 {
 630         struct rtl_priv *rtlpriv = rtl_priv(hw);
 631         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 632
 633         tcb_desc->packet_bw = false;
 634         if (!sta)
 635                 return;
 636         if (mac->opmode == NL80211_IFTYPE_AP ||
 637             mac->opmode == NL80211_IFTYPE_ADHOC) {
 638                 if (!(sta->ht_cap.ht_supported) ||
 639                     !(sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
 640                         return;
 641         } else if (mac->opmode == NL80211_IFTYPE_STATION) {
 642                 if (!mac->bw_40 || !(sta->ht_cap.ht_supported))
 643                         return;
 644         }
 645         if (tcb_desc->multicast || tcb_desc->broadcast)
 646                 return;
 647
 648         /*use legency rate, shall use 20MHz */
 649         if (tcb_desc->hw_rate <= rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M])
 650                 return;
 651
 652         tcb_desc->packet_bw = true;
 653 }
 654
 655 static u8 _rtl_get_highest_n_rate(struct ieee80211_hw *hw)
 656 {
 657         struct rtl_priv *rtlpriv = rtl_priv(hw);
 658         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 659         u8 hw_rate;
 660
 661         if (get_rf_type(rtlphy) == RF_2T2R)
 662                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15];
 663         else
 664                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS7];
 665
 666         return hw_rate;
 667 }
 668
 669 /* mac80211's rate_idx is like this:
 670  *
 671  * 2.4G band:rx_status->band == IEEE80211_BAND_2GHZ
 672  *
 673  * B/G rate:
 674  * (rx_status->flag & RX_FLAG_HT) = 0,
 675  * DESC92_RATE1M-->DESC92_RATE54M ==> idx is 0-->11,
 676  *
 677  * N rate:
 678  * (rx_status->flag & RX_FLAG_HT) = 1,
 679  * DESC92_RATEMCS0-->DESC92_RATEMCS15 ==> idx is 0-->15
 680  *
 681  * 5G band:rx_status->band == IEEE80211_BAND_5GHZ
 682  * A rate:
 683  * (rx_status->flag & RX_FLAG_HT) = 0,
 684  * DESC92_RATE6M-->DESC92_RATE54M ==> idx is 0-->7,
 685  *
 686  * N rate:
 687  * (rx_status->flag & RX_FLAG_HT) = 1,
 688  * DESC92_RATEMCS0-->DESC92_RATEMCS15 ==> idx is 0-->15
 689  */
 690 int rtlwifi_rate_mapping(struct ieee80211_hw *hw,
 691                          bool isht, u8 desc_rate, bool first_ampdu)
 692 {
 693         int rate_idx;
 694
 695         if (false == isht) {
 696                 if (IEEE80211_BAND_2GHZ == hw->conf.channel->band) {
 697                         switch (desc_rate) {
 698                         case DESC92_RATE1M:
 699                                 rate_idx = 0;
 700                                 break;
 701                         case DESC92_RATE2M:
 702                                 rate_idx = 1;
 703                                 break;
 704                         case DESC92_RATE5_5M:
 705                                 rate_idx = 2;
 706                                 break;
 707                         case DESC92_RATE11M:
 708                                 rate_idx = 3;
 709                                 break;
 710                         case DESC92_RATE6M:
 711                                 rate_idx = 4;
 712                                 break;
 713                         case DESC92_RATE9M:
 714                                 rate_idx = 5;
 715                                 break;
 716                         case DESC92_RATE12M:
 717                                 rate_idx = 6;
 718                                 break;
 719                         case DESC92_RATE18M:
 720                                 rate_idx = 7;
 721                                 break;
 722                         case DESC92_RATE24M:
 723                                 rate_idx = 8;
 724                                 break;
 725                         case DESC92_RATE36M:
 726                                 rate_idx = 9;
 727                                 break;
 728                         case DESC92_RATE48M:
 729                                 rate_idx = 10;
 730                                 break;
 731                         case DESC92_RATE54M:
 732                                 rate_idx = 11;
 733                                 break;
 734                         default:
 735                                 rate_idx = 0;
 736                                 break;
 737                         }
 738                 } else {
 739                         switch (desc_rate) {
 740                         case DESC92_RATE6M:
 741                                 rate_idx = 0;
 742                                 break;
 743                         case DESC92_RATE9M:
 744                                 rate_idx = 1;
 745                                 break;
 746                         case DESC92_RATE12M:
 747                                 rate_idx = 2;
 748                                 break;
 749                         case DESC92_RATE18M:
 750                                 rate_idx = 3;
 751                                 break;
 752                         case DESC92_RATE24M:
 753                                 rate_idx = 4;
 754                                 break;
 755                         case DESC92_RATE36M:
 756                                 rate_idx = 5;
 757                                 break;
 758                         case DESC92_RATE48M:
 759                                 rate_idx = 6;
 760                                 break;
 761                         case DESC92_RATE54M:
 762                                 rate_idx = 7;
 763                                 break;
 764                         default:
 765                                 rate_idx = 0;
 766                                 break;
 767                         }
 768                 }
 769
 770         } else {
 771
 772                 switch (desc_rate) {
 773                 case DESC92_RATEMCS0:
 774                         rate_idx = 0;
 775                         break;
 776                 case DESC92_RATEMCS1:
 777                         rate_idx = 1;
 778                         break;
 779                 case DESC92_RATEMCS2:
 780                         rate_idx = 2;
 781                         break;
 782                 case DESC92_RATEMCS3:
 783                         rate_idx = 3;
 784                         break;
 785                 case DESC92_RATEMCS4:
 786                         rate_idx = 4;
 787                         break;
 788                 case DESC92_RATEMCS5:
 789                         rate_idx = 5;
 790                         break;
 791                 case DESC92_RATEMCS6:
 792                         rate_idx = 6;
 793                         break;
 794                 case DESC92_RATEMCS7:
 795                         rate_idx = 7;
 796                         break;
 797                 case DESC92_RATEMCS8:
 798                         rate_idx = 8;
 799                         break;
 800                 case DESC92_RATEMCS9:
 801                         rate_idx = 9;
 802                         break;
 803                 case DESC92_RATEMCS10:
 804                         rate_idx = 10;
 805                         break;
 806                 case DESC92_RATEMCS11:
 807                         rate_idx = 11;
 808                         break;
 809                 case DESC92_RATEMCS12:
 810                         rate_idx = 12;
 811                         break;
 812                 case DESC92_RATEMCS13:
 813                         rate_idx = 13;
 814                         break;
 815                 case DESC92_RATEMCS14:
 816                         rate_idx = 14;
 817                         break;
 818                 case DESC92_RATEMCS15:
 819                         rate_idx = 15;
 820                         break;
 821                 default:
 822                         rate_idx = 0;
 823                         break;
 824                 }
 825         }
 826         return rate_idx;
 827 }
 828 EXPORT_SYMBOL(rtlwifi_rate_mapping);
 829
 830 void rtl_get_tcb_desc(struct ieee80211_hw *hw,
 831                       struct ieee80211_tx_info *info,
 832                       struct ieee80211_sta *sta,
 833                       struct sk_buff *skb, struct rtl_tcb_desc *tcb_desc)
 834 {
 835         struct rtl_priv *rtlpriv = rtl_priv(hw);
 836         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 837         struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 838         struct ieee80211_rate *txrate;
 839         __le16 fc = hdr->frame_control;
 840
 841         txrate = ieee80211_get_tx_rate(hw, info);
 842         tcb_desc->hw_rate = txrate->hw_value;
 843
 844         if (ieee80211_is_data(fc)) {
 845                 /*
 846                  *we set data rate INX 0
 847                  *in rtl_rc.c   if skb is special data or
 848                  *mgt which need low data rate.
 849                  */
 850
 851                 /*
 852                  *So tcb_desc->hw_rate is just used for
 853                  *special data and mgt frames
 854                  */
 855                 if (info->control.rates[0].idx == 0 ||
 856                                 ieee80211_is_nullfunc(fc)) {
 857                         tcb_desc->use_driver_rate = true;
 858                         tcb_desc->ratr_index = RATR_INX_WIRELESS_MC;
 859
 860                         tcb_desc->disable_ratefallback = 1;
 861                 } else {
 862                         /*
 863                          *because hw will nerver use hw_rate
 864                          *when tcb_desc->use_driver_rate = false
 865                          *so we never set highest N rate here,
 866                          *and N rate will all be controlled by FW
 867                          *when tcb_desc->use_driver_rate = false
 868                          */
 869                         if (sta && (sta->ht_cap.ht_supported)) {
 870                                 tcb_desc->hw_rate = _rtl_get_highest_n_rate(hw);
 871                         } else {
 872                                 if (rtlmac->mode == WIRELESS_MODE_B) {
 873                                         tcb_desc->hw_rate =
 874                                            rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M];
 875                                 } else {
 876                                         tcb_desc->hw_rate =
 877                                            rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M];
 878                                 }
 879                         }
 880                 }
 881
 882                 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
 883                         tcb_desc->multicast = 1;
 884                 else if (is_broadcast_ether_addr(ieee80211_get_DA(hdr)))
 885                         tcb_desc->broadcast = 1;
 886
 887                 _rtl_txrate_selectmode(hw, sta, tcb_desc);
 888                 _rtl_query_bandwidth_mode(hw, sta, tcb_desc);
 889                 _rtl_qurey_shortpreamble_mode(hw, tcb_desc, info);
 890                 _rtl_query_shortgi(hw, sta, tcb_desc, info);
 891                 _rtl_query_protection_mode(hw, tcb_desc, info);
 892         } else {
 893                 tcb_desc->use_driver_rate = true;
 894                 tcb_desc->ratr_index = RATR_INX_WIRELESS_MC;
 895                 tcb_desc->disable_ratefallback = 1;
 896                 tcb_desc->mac_id = 0;
 897                 tcb_desc->packet_bw = false;
 898         }
 899 }
 900 EXPORT_SYMBOL(rtl_get_tcb_desc);
 901
 902 bool rtl_action_proc(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 903 {
 904         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 905         struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 906         struct rtl_priv *rtlpriv = rtl_priv(hw);
 907         __le16 fc = hdr->frame_control;
 908         u8 *act = (u8 *) (((u8 *) skb->data + MAC80211_3ADDR_LEN));
 909         u8 category;
 910
 911         if (!ieee80211_is_action(fc))
 912                 return true;
 913
 914         category = *act;
 915         act++;
 916         switch (category) {
 917         case ACT_CAT_BA:
 918                 switch (*act) {
 919                 case ACT_ADDBAREQ:
 920                         if (mac->act_scanning)
 921                                 return false;
 922
 923                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 924                                  ("%s ACT_ADDBAREQ From :%pM\n",
 925                                   is_tx ? "Tx" : "Rx", hdr->addr2));
 926                         break;
 927                 case ACT_ADDBARSP:
 928                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 929                                  ("%s ACT_ADDBARSP From :%pM\n",
 930                                   is_tx ? "Tx" : "Rx", hdr->addr2));
 931                         break;
 932                 case ACT_DELBA:
 933                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 934                                  ("ACT_ADDBADEL From :%pM\n", hdr->addr2));
 935                         break;
 936                 }
 937                 break;
 938         default:
 939                 break;
 940         }
 941
 942         return true;
 943 }
 944
 945 /*should call before software enc*/
 946 u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 947 {
 948         struct rtl_priv *rtlpriv = rtl_priv(hw);
 949         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 950         __le16 fc = rtl_get_fc(skb);
 951         u16 ether_type;
 952         u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
 953         const struct iphdr *ip;
 954
 955         if (!ieee80211_is_data(fc))
 956                 return false;
 957
 958
 959         ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len +
 960                               SNAP_SIZE + PROTOC_TYPE_SIZE);
 961         ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE);
 962         /*      ether_type = ntohs(ether_type); */
 963
 964         if (ETH_P_IP == ether_type) {
 965                 if (IPPROTO_UDP == ip->protocol) {
 966                         struct udphdr *udp = (struct udphdr *)((u8 *) ip +
 967                                                                (ip->ihl << 2));
 968                         if (((((u8 *) udp)[1] == 68) &&
 969                              (((u8 *) udp)[3] == 67)) ||
 970                             ((((u8 *) udp)[1] == 67) &&
 971                              (((u8 *) udp)[3] == 68))) {
 972                                 /*
 973                                  * 68 : UDP BOOTP client
 974                                  * 67 : UDP BOOTP server
 975                                  */
 976                                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
 977                                          DBG_DMESG, ("dhcp %s !!\n",
 978                                                      (is_tx) ? "Tx" : "Rx"));
 979
 980                                 if (is_tx) {
 981                                         rtl_lps_leave(hw);
 982                                         ppsc->last_delaylps_stamp_jiffies =
 983                                             jiffies;
 984                                 }
 985
 986                                 return true;
 987                         }
 988                 }
 989         } else if (ETH_P_ARP == ether_type) {
 990                 if (is_tx) {
 991                         rtl_lps_leave(hw);
 992                         ppsc->last_delaylps_stamp_jiffies = jiffies;
 993                 }
 994
 995                 return true;
 996         } else if (ETH_P_PAE == ether_type) {
 997                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 998                          ("802.1X %s EAPOL pkt!!\n", (is_tx) ? "Tx" : "Rx"));
 999
1000                 if (is_tx) {
1001                         rtl_lps_leave(hw);
1002                         ppsc->last_delaylps_stamp_jiffies = jiffies;
1003                 }
1004
1005                 return true;
1006         } else if (ETH_P_IPV6 == ether_type) {
1007                 /* IPv6 */
1008                 return true;
1009         }
1010
1011         return false;
1012 }
1013
1014 /*********************************************************
1015  *
1016  * functions called by core.c
1017  *
1018  *********************************************************/
1019 int rtl_tx_agg_start(struct ieee80211_hw *hw,
1020                 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
1021 {
1022         struct rtl_priv *rtlpriv = rtl_priv(hw);
1023         struct rtl_tid_data *tid_data;
1024         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
1025         struct rtl_sta_info *sta_entry = NULL;
1026
1027         if (sta == NULL)
1028                 return -EINVAL;
1029
1030         if (unlikely(tid >= MAX_TID_COUNT))
1031                 return -EINVAL;
1032
1033         sta_entry = (struct rtl_sta_info *)sta->drv_priv;
1034         if (!sta_entry)
1035                 return -ENXIO;
1036         tid_data = &sta_entry->tids[tid];
1037
1038         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
1039                  ("on ra = %pM tid = %d seq:%d\n", sta->addr, tid,
1040                  tid_data->seq_number));
1041
1042         *ssn = tid_data->seq_number;
1043         tid_data->agg.agg_state = RTL_AGG_START;
1044
1045         ieee80211_start_tx_ba_cb_irqsafe(mac->vif, sta->addr, tid);
1046
1047         return 0;
1048 }
1049
1050 int rtl_tx_agg_stop(struct ieee80211_hw *hw,
1051                 struct ieee80211_sta *sta, u16 tid)
1052 {
1053         struct rtl_priv *rtlpriv = rtl_priv(hw);
1054         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
1055         struct rtl_sta_info *sta_entry = NULL;
1056
1057         if (sta == NULL)
1058                 return -EINVAL;
1059
1060         if (!sta->addr) {
1061                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("ra = NULL\n"));
1062                 return -EINVAL;
1063         }
1064
1065         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
1066                  ("on ra = %pM tid = %d\n", sta->addr, tid));
1067
1068         if (unlikely(tid >= MAX_TID_COUNT))
1069                 return -EINVAL;
1070
1071         sta_entry = (struct rtl_sta_info *)sta->drv_priv;
1072         sta_entry->tids[tid].agg.agg_state = RTL_AGG_STOP;
1073
1074         ieee80211_stop_tx_ba_cb_irqsafe(mac->vif, sta->addr, tid);
1075
1076         return 0;
1077 }
1078
1079 int rtl_tx_agg_oper(struct ieee80211_hw *hw,
1080                 struct ieee80211_sta *sta, u16 tid)
1081 {
1082         struct rtl_priv *rtlpriv = rtl_priv(hw);
1083         struct rtl_sta_info *sta_entry = NULL;
1084
1085         if (sta == NULL)
1086                 return -EINVAL;
1087
1088         if (!sta->addr) {
1089                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("ra = NULL\n"));
1090                 return -EINVAL;
1091         }
1092
1093         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
1094                  ("on ra = %pM tid = %d\n", sta->addr, tid));
1095
1096         if (unlikely(tid >= MAX_TID_COUNT))
1097                 return -EINVAL;
1098
1099         sta_entry = (struct rtl_sta_info *)sta->drv_priv;
1100         sta_entry->tids[tid].agg.agg_state = RTL_AGG_OPERATIONAL;
1101
1102         return 0;
1103 }
1104
1105 /*********************************************************
1106  *
1107  * wq & timer callback functions
1108  *
1109  *********************************************************/
1110 void rtl_watchdog_wq_callback(void *data)
1111 {
1112         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
1113                                                             struct rtl_works,
1114                                                             watchdog_wq);
1115         struct ieee80211_hw *hw = rtlworks->hw;
1116         struct rtl_priv *rtlpriv = rtl_priv(hw);
1117         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1118         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
1119         bool busytraffic = false;
1120         bool higher_busytraffic = false;
1121         bool higher_busyrxtraffic = false;
1122         u8 idx, tid;
1123         u32 rx_cnt_inp4eriod = 0;
1124         u32 tx_cnt_inp4eriod = 0;
1125         u32 aver_rx_cnt_inperiod = 0;
1126         u32 aver_tx_cnt_inperiod = 0;
1127         u32 aver_tidtx_inperiod[MAX_TID_COUNT] = {0};
1128         u32 tidtx_inp4eriod[MAX_TID_COUNT] = {0};
1129         bool enter_ps = false;
1130
1131         if (is_hal_stop(rtlhal))
1132                 return;
1133
1134         /* <1> Determine if action frame is allowed */
1135         if (mac->link_state > MAC80211_NOLINK) {
1136                 if (mac->cnt_after_linked < 20)
1137                         mac->cnt_after_linked++;
1138         } else {
1139                 mac->cnt_after_linked = 0;
1140         }
1141
1142         /*
1143          *<2> to check if traffic busy, if
1144          * busytraffic we don't change channel
1145          */
1146         if (mac->link_state >= MAC80211_LINKED) {
1147
1148                 /* (1) get aver_rx_cnt_inperiod & aver_tx_cnt_inperiod */
1149                 for (idx = 0; idx <= 2; idx++) {
1150                         rtlpriv->link_info.num_rx_in4period[idx] =
1151                             rtlpriv->link_info.num_rx_in4period[idx + 1];
1152                         rtlpriv->link_info.num_tx_in4period[idx] =
1153                             rtlpriv->link_info.num_tx_in4period[idx + 1];
1154                 }
1155                 rtlpriv->link_info.num_rx_in4period[3] =
1156                     rtlpriv->link_info.num_rx_inperiod;
1157                 rtlpriv->link_info.num_tx_in4period[3] =
1158                     rtlpriv->link_info.num_tx_inperiod;
1159                 for (idx = 0; idx <= 3; idx++) {
1160                         rx_cnt_inp4eriod +=
1161                             rtlpriv->link_info.num_rx_in4period[idx];
1162                         tx_cnt_inp4eriod +=
1163                             rtlpriv->link_info.num_tx_in4period[idx];
1164                 }
1165                 aver_rx_cnt_inperiod = rx_cnt_inp4eriod / 4;
1166                 aver_tx_cnt_inperiod = tx_cnt_inp4eriod / 4;
1167
1168                 /* (2) check traffic busy */
1169                 if (aver_rx_cnt_inperiod > 100 || aver_tx_cnt_inperiod > 100)
1170                         busytraffic = true;
1171
1172                 /* Higher Tx/Rx data. */
1173                 if (aver_rx_cnt_inperiod > 4000 ||
1174                     aver_tx_cnt_inperiod > 4000) {
1175                         higher_busytraffic = true;
1176
1177                         /* Extremely high Rx data. */
1178                         if (aver_rx_cnt_inperiod > 5000)
1179                                 higher_busyrxtraffic = true;
1180                 }
1181
1182                 /* check every tid's tx traffic */
1183                 for (tid = 0; tid <= 7; tid++) {
1184                         for (idx = 0; idx <= 2; idx++)
1185                                 rtlpriv->link_info.tidtx_in4period[tid][idx] =
1186                                   rtlpriv->link_info.tidtx_in4period[tid]
1187                                   [idx + 1];
1188                         rtlpriv->link_info.tidtx_in4period[tid][3] =
1189                                 rtlpriv->link_info.tidtx_inperiod[tid];
1190
1191                         for (idx = 0; idx <= 3; idx++)
1192                                 tidtx_inp4eriod[tid] +=
1193                                   rtlpriv->link_info.tidtx_in4period[tid][idx];
1194                         aver_tidtx_inperiod[tid] = tidtx_inp4eriod[tid] / 4;
1195                         if (aver_tidtx_inperiod[tid] > 5000)
1196                                 rtlpriv->link_info.higher_busytxtraffic[tid] =
1197                                                    true;
1198                         else
1199                                 rtlpriv->link_info.higher_busytxtraffic[tid] =
1200                                                    false;
1201                 }
1202
1203                 if (((rtlpriv->link_info.num_rx_inperiod +
1204                       rtlpriv->link_info.num_tx_inperiod) > 8) ||
1205                     (rtlpriv->link_info.num_rx_inperiod > 2))
1206                         enter_ps = false;
1207                 else
1208                         enter_ps = true;
1209
1210                 /* LeisurePS only work in infra mode. */
1211                 if (enter_ps)
1212                         rtl_lps_enter(hw);
1213                 else
1214                         rtl_lps_leave(hw);
1215         }
1216
1217         rtlpriv->link_info.num_rx_inperiod = 0;
1218         rtlpriv->link_info.num_tx_inperiod = 0;
1219         for (tid = 0; tid <= 7; tid++)
1220                 rtlpriv->link_info.tidtx_inperiod[tid] = 0;
1221
1222         rtlpriv->link_info.busytraffic = busytraffic;
1223         rtlpriv->link_info.higher_busytraffic = higher_busytraffic;
1224         rtlpriv->link_info.higher_busyrxtraffic = higher_busyrxtraffic;
1225
1226         /* <3> DM */
1227         rtlpriv->cfg->ops->dm_watchdog(hw);
1228 }
1229
1230 void rtl_watch_dog_timer_callback(unsigned long data)
1231 {
1232         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
1233         struct rtl_priv *rtlpriv = rtl_priv(hw);
1234
1235         queue_delayed_work(rtlpriv->works.rtl_wq,
1236                            &rtlpriv->works.watchdog_wq, 0);
1237
1238         mod_timer(&rtlpriv->works.watchdog_timer,
1239                   jiffies + MSECS(RTL_WATCH_DOG_TIME));
1240 }
1241
1242 /*********************************************************
1243  *
1244  * frame process functions
1245  *
1246  *********************************************************/
1247 u8 *rtl_find_ie(u8 *data, unsigned int len, u8 ie)
1248 {
1249         struct ieee80211_mgmt *mgmt = (void *)data;
1250         u8 *pos, *end;
1251
1252         pos = (u8 *)mgmt->u.beacon.variable;
1253         end = data + len;
1254         while (pos < end) {
1255                 if (pos + 2 + pos[1] > end)
1256                         return NULL;
1257
1258                 if (pos[0] == ie)
1259                         return pos;
1260
1261                 pos += 2 + pos[1];
1262         }
1263         return NULL;
1264 }
1265
1266 /* when we use 2 rx ants we send IEEE80211_SMPS_OFF */
1267 /* when we use 1 rx ant we send IEEE80211_SMPS_STATIC */
1268 static struct sk_buff *rtl_make_smps_action(struct ieee80211_hw *hw,
1269                 enum ieee80211_smps_mode smps, u8 *da, u8 *bssid)
1270 {
1271         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
1272         struct sk_buff *skb;
1273         struct ieee80211_mgmt *action_frame;
1274
1275         /* 27 = header + category + action + smps mode */
1276         skb = dev_alloc_skb(27 + hw->extra_tx_headroom);
1277         if (!skb)
1278                 return NULL;
1279
1280         skb_reserve(skb, hw->extra_tx_headroom);
1281         action_frame = (void *)skb_put(skb, 27);
1282         memset(action_frame, 0, 27);
1283         memcpy(action_frame->da, da, ETH_ALEN);
1284         memcpy(action_frame->sa, rtlefuse->dev_addr, ETH_ALEN);
1285         memcpy(action_frame->bssid, bssid, ETH_ALEN);
1286         action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1287                                                   IEEE80211_STYPE_ACTION);
1288         action_frame->u.action.category = WLAN_CATEGORY_HT;
1289         action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
1290         switch (smps) {
1291         case IEEE80211_SMPS_AUTOMATIC:/* 0 */
1292         case IEEE80211_SMPS_NUM_MODES:/* 4 */
1293                 WARN_ON(1);
1294         case IEEE80211_SMPS_OFF:/* 1 */ /*MIMO_PS_NOLIMIT*/
1295                 action_frame->u.action.u.ht_smps.smps_control =
1296                                 WLAN_HT_SMPS_CONTROL_DISABLED;/* 0 */
1297                 break;
1298         case IEEE80211_SMPS_STATIC:/* 2 */ /*MIMO_PS_STATIC*/
1299                 action_frame->u.action.u.ht_smps.smps_control =
1300                                 WLAN_HT_SMPS_CONTROL_STATIC;/* 1 */
1301                 break;
1302         case IEEE80211_SMPS_DYNAMIC:/* 3 */ /*MIMO_PS_DYNAMIC*/
1303                 action_frame->u.action.u.ht_smps.smps_control =
1304                                 WLAN_HT_SMPS_CONTROL_DYNAMIC;/* 3 */
1305                 break;
1306         }
1307
1308         return skb;
1309 }
1310
1311 int rtl_send_smps_action(struct ieee80211_hw *hw,
1312                 struct ieee80211_sta *sta, u8 *da, u8 *bssid,
1313                 enum ieee80211_smps_mode smps)
1314 {
1315         struct rtl_priv *rtlpriv = rtl_priv(hw);
1316         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1317         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
1318         struct sk_buff *skb = rtl_make_smps_action(hw, smps, da, bssid);
1319         struct rtl_tcb_desc tcb_desc;
1320         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
1321
1322         if (rtlpriv->mac80211.act_scanning)
1323                 goto err_free;
1324
1325         if (!sta)
1326                 goto err_free;
1327
1328         if (unlikely(is_hal_stop(rtlhal) || ppsc->rfpwr_state != ERFON))
1329                 goto err_free;
1330
1331         if (!test_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status))
1332                 goto err_free;
1333
1334         /* this is a type = mgmt * stype = action frame */
1335         if (skb) {
1336                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1337                 struct rtl_sta_info *sta_entry =
1338                         (struct rtl_sta_info *) sta->drv_priv;
1339                 sta_entry->mimo_ps = smps;
1340                 rtlpriv->cfg->ops->update_rate_tbl(hw, sta, 0);
1341
1342                 info->control.rates[0].idx = 0;
1343                 info->control.sta = sta;
1344                 info->band = hw->conf.channel->band;
1345                 rtlpriv->intf_ops->adapter_tx(hw, skb, &tcb_desc);
1346         }
1347 err_free:
1348         return 0;
1349 }
1350
1351 /*********************************************************
1352  *
1353  * IOT functions
1354  *
1355  *********************************************************/
1356 static bool rtl_chk_vendor_ouisub(struct ieee80211_hw *hw,
1357                 struct octet_string vendor_ie)
1358 {
1359         struct rtl_priv *rtlpriv = rtl_priv(hw);
1360         bool matched = false;
1361         static u8 athcap_1[] = { 0x00, 0x03, 0x7F };
1362         static u8 athcap_2[] = { 0x00, 0x13, 0x74 };
1363         static u8 broadcap_1[] = { 0x00, 0x10, 0x18 };
1364         static u8 broadcap_2[] = { 0x00, 0x0a, 0xf7 };
1365         static u8 broadcap_3[] = { 0x00, 0x05, 0xb5 };
1366         static u8 racap[] = { 0x00, 0x0c, 0x43 };
1367         static u8 ciscocap[] = { 0x00, 0x40, 0x96 };
1368         static u8 marvcap[] = { 0x00, 0x50, 0x43 };
1369
1370         if (memcmp(vendor_ie.octet, athcap_1, 3) == 0 ||
1371                 memcmp(vendor_ie.octet, athcap_2, 3) == 0) {
1372                 rtlpriv->mac80211.vendor = PEER_ATH;
1373                 matched = true;
1374         } else if (memcmp(vendor_ie.octet, broadcap_1, 3) == 0 ||
1375                 memcmp(vendor_ie.octet, broadcap_2, 3) == 0 ||
1376                 memcmp(vendor_ie.octet, broadcap_3, 3) == 0) {
1377                 rtlpriv->mac80211.vendor = PEER_BROAD;
1378                 matched = true;
1379         } else if (memcmp(vendor_ie.octet, racap, 3) == 0) {
1380                 rtlpriv->mac80211.vendor = PEER_RAL;
1381                 matched = true;
1382         } else if (memcmp(vendor_ie.octet, ciscocap, 3) == 0) {
1383                 rtlpriv->mac80211.vendor = PEER_CISCO;
1384                 matched = true;
1385         } else if (memcmp(vendor_ie.octet, marvcap, 3) == 0) {
1386                 rtlpriv->mac80211.vendor = PEER_MARV;
1387                 matched = true;
1388         }
1389
1390         return matched;
1391 }
1392
1393 static bool rtl_find_221_ie(struct ieee80211_hw *hw, u8 *data,
1394                 unsigned int len)
1395 {
1396         struct ieee80211_mgmt *mgmt = (void *)data;
1397         struct octet_string vendor_ie;
1398         u8 *pos, *end;
1399
1400         pos = (u8 *)mgmt->u.beacon.variable;
1401         end = data + len;
1402         while (pos < end) {
1403                 if (pos[0] == 221) {
1404                         vendor_ie.length = pos[1];
1405                         vendor_ie.octet = &pos[2];
1406                         if (rtl_chk_vendor_ouisub(hw, vendor_ie))
1407                                 return true;
1408                 }
1409
1410                 if (pos + 2 + pos[1] > end)
1411                         return false;
1412
1413                 pos += 2 + pos[1];
1414         }
1415         return false;
1416 }
1417
1418 void rtl_recognize_peer(struct ieee80211_hw *hw, u8 *data, unsigned int len)
1419 {
1420         struct rtl_priv *rtlpriv = rtl_priv(hw);
1421         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
1422         struct ieee80211_hdr *hdr = (void *)data;
1423         u32 vendor = PEER_UNKNOWN;
1424
1425         static u8 ap3_1[3] = { 0x00, 0x14, 0xbf };
1426         static u8 ap3_2[3] = { 0x00, 0x1a, 0x70 };
1427         static u8 ap3_3[3] = { 0x00, 0x1d, 0x7e };
1428         static u8 ap4_1[3] = { 0x00, 0x90, 0xcc };
1429         static u8 ap4_2[3] = { 0x00, 0x0e, 0x2e };
1430         static u8 ap4_3[3] = { 0x00, 0x18, 0x02 };
1431         static u8 ap4_4[3] = { 0x00, 0x17, 0x3f };
1432         static u8 ap4_5[3] = { 0x00, 0x1c, 0xdf };
1433         static u8 ap5_1[3] = { 0x00, 0x1c, 0xf0 };
1434         static u8 ap5_2[3] = { 0x00, 0x21, 0x91 };
1435         static u8 ap5_3[3] = { 0x00, 0x24, 0x01 };
1436         static u8 ap5_4[3] = { 0x00, 0x15, 0xe9 };
1437         static u8 ap5_5[3] = { 0x00, 0x17, 0x9A };
1438         static u8 ap5_6[3] = { 0x00, 0x18, 0xE7 };
1439         static u8 ap6_1[3] = { 0x00, 0x17, 0x94 };
1440         static u8 ap7_1[3] = { 0x00, 0x14, 0xa4 };
1441
1442         if (mac->opmode != NL80211_IFTYPE_STATION)
1443                 return;
1444
1445         if (mac->link_state == MAC80211_NOLINK) {
1446                 mac->vendor = PEER_UNKNOWN;
1447                 return;
1448         }
1449
1450         if (mac->cnt_after_linked > 2)
1451                 return;
1452
1453         /* check if this really is a beacon */
1454         if (!ieee80211_is_beacon(hdr->frame_control))
1455                 return;
1456
1457         /* min. beacon length + FCS_LEN */
1458         if (len <= 40 + FCS_LEN)
1459                 return;
1460
1461         /* and only beacons from the associated BSSID, please */
1462         if (compare_ether_addr(hdr->addr3, rtlpriv->mac80211.bssid))
1463                 return;
1464
1465         if (rtl_find_221_ie(hw, data, len))
1466                 vendor = mac->vendor;
1467
1468         if ((memcmp(mac->bssid, ap5_1, 3) == 0) ||
1469                 (memcmp(mac->bssid, ap5_2, 3) == 0) ||
1470                 (memcmp(mac->bssid, ap5_3, 3) == 0) ||
1471                 (memcmp(mac->bssid, ap5_4, 3) == 0) ||
1472                 (memcmp(mac->bssid, ap5_5, 3) == 0) ||
1473                 (memcmp(mac->bssid, ap5_6, 3) == 0) ||
1474                 vendor == PEER_ATH) {
1475                 vendor = PEER_ATH;
1476                 RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, ("=>ath find\n"));
1477         } else if ((memcmp(mac->bssid, ap4_4, 3) == 0) ||
1478                 (memcmp(mac->bssid, ap4_5, 3) == 0) ||
1479                 (memcmp(mac->bssid, ap4_1, 3) == 0) ||
1480                 (memcmp(mac->bssid, ap4_2, 3) == 0) ||
1481                 (memcmp(mac->bssid, ap4_3, 3) == 0) ||
1482                 vendor == PEER_RAL) {
1483                 RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, ("=>ral findn\n"));
1484                 vendor = PEER_RAL;
1485         } else if (memcmp(mac->bssid, ap6_1, 3) == 0 ||
1486                 vendor == PEER_CISCO) {
1487                 vendor = PEER_CISCO;
1488                 RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, ("=>cisco find\n"));
1489         } else if ((memcmp(mac->bssid, ap3_1, 3) == 0) ||
1490                 (memcmp(mac->bssid, ap3_2, 3) == 0) ||
1491                 (memcmp(mac->bssid, ap3_3, 3) == 0) ||
1492                 vendor == PEER_BROAD) {
1493                 RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, ("=>broad find\n"));
1494                 vendor = PEER_BROAD;
1495         } else if (memcmp(mac->bssid, ap7_1, 3) == 0 ||
1496                 vendor == PEER_MARV) {
1497                 vendor = PEER_MARV;
1498                 RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, ("=>marv find\n"));
1499         }
1500
1501         mac->vendor = vendor;
1502 }
1503
1504 /*********************************************************
1505  *
1506  * sysfs functions
1507  *
1508  *********************************************************/
1509 static ssize_t rtl_show_debug_level(struct device *d,
1510                                     struct device_attribute *attr, char *buf)
1511 {
1512         struct ieee80211_hw *hw = dev_get_drvdata(d);
1513         struct rtl_priv *rtlpriv = rtl_priv(hw);
1514
1515         return sprintf(buf, "0x%08X\n", rtlpriv->dbg.global_debuglevel);
1516 }
1517
1518 static ssize_t rtl_store_debug_level(struct device *d,
1519                                      struct device_attribute *attr,
1520                                      const char *buf, size_t count)
1521 {
1522         struct ieee80211_hw *hw = dev_get_drvdata(d);
1523         struct rtl_priv *rtlpriv = rtl_priv(hw);
1524         unsigned long val;
1525         int ret;
1526
1527         ret = strict_strtoul(buf, 0, &val);
1528         if (ret) {
1529                 printk(KERN_DEBUG "%s is not in hex or decimal form.\n", buf);
1530         } else {
1531                 rtlpriv->dbg.global_debuglevel = val;
1532                 printk(KERN_DEBUG "debuglevel:%x\n",
1533                        rtlpriv->dbg.global_debuglevel);
1534         }
1535
1536         return strnlen(buf, count);
1537 }
1538
1539 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
1540                    rtl_show_debug_level, rtl_store_debug_level);
1541
1542 static struct attribute *rtl_sysfs_entries[] = {
1543
1544         &dev_attr_debug_level.attr,
1545
1546         NULL
1547 };
1548
1549 /*
1550  * "name" is folder name witch will be
1551  * put in device directory like :
1552  * sys/devices/pci0000:00/0000:00:1c.4/
1553  * 0000:06:00.0/rtl_sysfs
1554  */
1555 struct attribute_group rtl_attribute_group = {
1556         .name = "rtlsysfs",
1557         .attrs = rtl_sysfs_entries,
1558 };
1559
1560 MODULE_AUTHOR("lizhaoming       <chaoming_li@realsil.com.cn>");
1561 MODULE_AUTHOR("Realtek WlanFAE  <wlanfae@realtek.com>");
1562 MODULE_AUTHOR("Larry Finger     <Larry.FInger@lwfinger.net>");
1563 MODULE_LICENSE("GPL");
1564 MODULE_DESCRIPTION("Realtek 802.11n PCI wireless core");
1565
1566 static int __init rtl_core_module_init(void)
1567 {
1568         if (rtl_rate_control_register())
1569                 pr_err("Unable to register rtl_rc, use default RC !!\n");
1570
1571         return 0;
1572 }
1573
1574 static void __exit rtl_core_module_exit(void)
1575 {
1576         /*RC*/
1577         rtl_rate_control_unregister();
1578 }
1579
1580 module_init(rtl_core_module_init);
1581 module_exit(rtl_core_module_exit);