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         /*set init state to on */
 255         rtlpriv->rfkill.rfkill_state = 1;
 256         wiphy_rfkill_set_hw_state(hw->wiphy, 0);
 257
 258         radio_state = rtlpriv->cfg->ops->radio_onoff_checking(hw, &valid);
 259
 260         if (valid) {
 261                 printk(KERN_INFO "rtlwifi: wireless switch is %s\n",
 262                                 rtlpriv->rfkill.rfkill_state ? "on" : "off");
 263
 264                 rtlpriv->rfkill.rfkill_state = radio_state;
 265
 266                 blocked = (rtlpriv->rfkill.rfkill_state == 1) ? 0 : 1;
 267                 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
 268         }
 269
 270         wiphy_rfkill_start_polling(hw->wiphy);
 271 }
 272
 273 void rtl_deinit_rfkill(struct ieee80211_hw *hw)
 274 {
 275         wiphy_rfkill_stop_polling(hw->wiphy);
 276 }
 277
 278 int rtl_init_core(struct ieee80211_hw *hw)
 279 {
 280         struct rtl_priv *rtlpriv = rtl_priv(hw);
 281         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 282
 283         /* <1> init mac80211 */
 284         _rtl_init_mac80211(hw);
 285         rtlmac->hw = hw;
 286
 287         /* <2> rate control register */
 288         hw->rate_control_algorithm = "rtl_rc";
 289
 290         /*
 291          * <3> init CRDA must come after init
 292          * mac80211 hw  in _rtl_init_mac80211.
 293          */
 294         if (rtl_regd_init(hw, rtl_reg_notifier)) {
 295                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("REGD init failed\n"));
 296                 return 1;
 297         } else {
 298                 /* CRDA regd hint must after init CRDA */
 299                 if (regulatory_hint(hw->wiphy, rtlpriv->regd.alpha2)) {
 300                         RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 301                                  ("regulatory_hint fail\n"));
 302                 }
 303         }
 304
 305         /* <4> locks */
 306         mutex_init(&rtlpriv->locks.conf_mutex);
 307         spin_lock_init(&rtlpriv->locks.ips_lock);
 308         spin_lock_init(&rtlpriv->locks.irq_th_lock);
 309         spin_lock_init(&rtlpriv->locks.h2c_lock);
 310         spin_lock_init(&rtlpriv->locks.rf_ps_lock);
 311         spin_lock_init(&rtlpriv->locks.rf_lock);
 312         spin_lock_init(&rtlpriv->locks.lps_lock);
 313
 314         rtlmac->link_state = MAC80211_NOLINK;
 315
 316         /* <5> init deferred work */
 317         _rtl_init_deferred_work(hw);
 318
 319         return 0;
 320 }
 321
 322 void rtl_deinit_core(struct ieee80211_hw *hw)
 323 {
 324 }
 325
 326 void rtl_init_rx_config(struct ieee80211_hw *hw)
 327 {
 328         struct rtl_priv *rtlpriv = rtl_priv(hw);
 329         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 330
 331         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *) (&mac->rx_conf));
 332         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_MGT_FILTER,
 333                                       (u8 *) (&mac->rx_mgt_filter));
 334         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_CTRL_FILTER,
 335                                       (u8 *) (&mac->rx_ctrl_filter));
 336         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_DATA_FILTER,
 337                                       (u8 *) (&mac->rx_data_filter));
 338 }
 339
 340 /*********************************************************
 341  *
 342  * tx information functions
 343  *
 344  *********************************************************/
 345 static void _rtl_qurey_shortpreamble_mode(struct ieee80211_hw *hw,
 346                                           struct rtl_tcb_desc *tcb_desc,
 347                                           struct ieee80211_tx_info *info)
 348 {
 349         struct rtl_priv *rtlpriv = rtl_priv(hw);
 350         u8 rate_flag = info->control.rates[0].flags;
 351
 352         tcb_desc->use_shortpreamble = false;
 353
 354         /* 1M can only use Long Preamble. 11B spec */
 355         if (tcb_desc->hw_rate == rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M])
 356                 return;
 357         else if (rate_flag & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 358                 tcb_desc->use_shortpreamble = true;
 359
 360         return;
 361 }
 362
 363 static void _rtl_query_shortgi(struct ieee80211_hw *hw,
 364                                struct rtl_tcb_desc *tcb_desc,
 365                                struct ieee80211_tx_info *info)
 366 {
 367         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 368         u8 rate_flag = info->control.rates[0].flags;
 369
 370         tcb_desc->use_shortgi = false;
 371
 372         if (!mac->ht_enable)
 373                 return;
 374
 375         if (!mac->sgi_40 && !mac->sgi_20)
 376                 return;
 377
 378         if ((mac->bw_40 == true) && mac->sgi_40)
 379                 tcb_desc->use_shortgi = true;
 380         else if ((mac->bw_40 == false) && mac->sgi_20)
 381                 tcb_desc->use_shortgi = true;
 382
 383         if (!(rate_flag & IEEE80211_TX_RC_SHORT_GI))
 384                 tcb_desc->use_shortgi = false;
 385
 386 }
 387
 388 static void _rtl_query_protection_mode(struct ieee80211_hw *hw,
 389                                        struct rtl_tcb_desc *tcb_desc,
 390                                        struct ieee80211_tx_info *info)
 391 {
 392         struct rtl_priv *rtlpriv = rtl_priv(hw);
 393         u8 rate_flag = info->control.rates[0].flags;
 394
 395         /* Common Settings */
 396         tcb_desc->rts_stbc = false;
 397         tcb_desc->cts_enable = false;
 398         tcb_desc->rts_sc = 0;
 399         tcb_desc->rts_bw = false;
 400         tcb_desc->rts_use_shortpreamble = false;
 401         tcb_desc->rts_use_shortgi = false;
 402
 403         if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 404                 /* Use CTS-to-SELF in protection mode. */
 405                 tcb_desc->rts_enable = true;
 406                 tcb_desc->cts_enable = true;
 407                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 408         } else if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
 409                 /* Use RTS-CTS in protection mode. */
 410                 tcb_desc->rts_enable = true;
 411                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 412         }
 413
 414 }
 415
 416 static void _rtl_txrate_selectmode(struct ieee80211_hw *hw,
 417                                    struct rtl_tcb_desc *tcb_desc)
 418 {
 419         struct rtl_priv *rtlpriv = rtl_priv(hw);
 420         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 421
 422         if (!tcb_desc->disable_ratefallback || !tcb_desc->use_driver_rate) {
 423                 if (mac->opmode == NL80211_IFTYPE_STATION)
 424                         tcb_desc->ratr_index = 0;
 425                 else if (mac->opmode == NL80211_IFTYPE_ADHOC) {
 426                         if (tcb_desc->multicast || tcb_desc->broadcast) {
 427                                 tcb_desc->hw_rate =
 428                                     rtlpriv->cfg->maps[RTL_RC_CCK_RATE2M];
 429                                 tcb_desc->use_driver_rate = 1;
 430                         } else {
 431                                 /* TODO */
 432                         }
 433                 }
 434         }
 435
 436         if (rtlpriv->dm.useramask) {
 437                 /* TODO adhoc and station handled differently in the future */
 438                 tcb_desc->mac_id = 0;
 439
 440                 if ((mac->mode == WIRELESS_MODE_N_24G) ||
 441                     (mac->mode == WIRELESS_MODE_N_5G)) {
 442                         tcb_desc->ratr_index = RATR_INX_WIRELESS_NGB;
 443                 } else if (mac->mode & WIRELESS_MODE_G) {
 444                         tcb_desc->ratr_index = RATR_INX_WIRELESS_GB;
 445                 } else if (mac->mode & WIRELESS_MODE_B) {
 446                         tcb_desc->ratr_index = RATR_INX_WIRELESS_B;
 447                 }
 448         }
 449
 450 }
 451
 452 static void _rtl_query_bandwidth_mode(struct ieee80211_hw *hw,
 453                                       struct rtl_tcb_desc *tcb_desc)
 454 {
 455         struct rtl_priv *rtlpriv = rtl_priv(hw);
 456         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 457
 458         tcb_desc->packet_bw = false;
 459
 460         if (!mac->bw_40 || !mac->ht_enable)
 461                 return;
 462
 463         if (tcb_desc->multicast || tcb_desc->broadcast)
 464                 return;
 465
 466         /*use legency rate, shall use 20MHz */
 467         if (tcb_desc->hw_rate <= rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M])
 468                 return;
 469
 470         tcb_desc->packet_bw = true;
 471 }
 472
 473 static u8 _rtl_get_highest_n_rate(struct ieee80211_hw *hw)
 474 {
 475         struct rtl_priv *rtlpriv = rtl_priv(hw);
 476         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 477         u8 hw_rate;
 478
 479         if (get_rf_type(rtlphy) == RF_2T2R)
 480                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15];
 481         else
 482                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS7];
 483
 484         return hw_rate;
 485 }
 486
 487 void rtl_get_tcb_desc(struct ieee80211_hw *hw,
 488                       struct ieee80211_tx_info *info,
 489                       struct sk_buff *skb, struct rtl_tcb_desc *tcb_desc)
 490 {
 491         struct rtl_priv *rtlpriv = rtl_priv(hw);
 492         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 493         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 494         struct ieee80211_rate *txrate;
 495         __le16 fc = hdr->frame_control;
 496
 497         memset(tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 498
 499         if (ieee80211_is_data(fc)) {
 500                 txrate = ieee80211_get_tx_rate(hw, info);
 501                 tcb_desc->hw_rate = txrate->hw_value;
 502
 503                 /*
 504                  *we set data rate RTL_RC_CCK_RATE1M
 505                  *in rtl_rc.c   if skb is special data or
 506                  *mgt which need low data rate.
 507                  */
 508
 509                 /*
 510                  *So tcb_desc->hw_rate is just used for
 511                  *special data and mgt frames
 512                  */
 513                 if (tcb_desc->hw_rate < rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M]) {
 514                         tcb_desc->use_driver_rate = true;
 515                         tcb_desc->ratr_index = 7;
 516
 517                         tcb_desc->hw_rate =
 518                             rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
 519                         tcb_desc->disable_ratefallback = 1;
 520                 } else {
 521                         /*
 522                          *because hw will nerver use hw_rate
 523                          *when tcb_desc->use_driver_rate = false
 524                          *so we never set highest N rate here,
 525                          *and N rate will all be controlled by FW
 526                          *when tcb_desc->use_driver_rate = false
 527                          */
 528                         if (rtlmac->ht_enable) {
 529                                 tcb_desc->hw_rate = _rtl_get_highest_n_rate(hw);
 530                         } else {
 531                                 if (rtlmac->mode == WIRELESS_MODE_B) {
 532                                         tcb_desc->hw_rate =
 533                                            rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M];
 534                                 } else {
 535                                         tcb_desc->hw_rate =
 536                                            rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M];
 537                                 }
 538                         }
 539                 }
 540
 541                 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
 542                         tcb_desc->multicast = 1;
 543                 else if (is_broadcast_ether_addr(ieee80211_get_DA(hdr)))
 544                         tcb_desc->broadcast = 1;
 545
 546                 _rtl_txrate_selectmode(hw, tcb_desc);
 547                 _rtl_query_bandwidth_mode(hw, tcb_desc);
 548                 _rtl_qurey_shortpreamble_mode(hw, tcb_desc, info);
 549                 _rtl_query_shortgi(hw, tcb_desc, info);
 550                 _rtl_query_protection_mode(hw, tcb_desc, info);
 551         } else {
 552                 tcb_desc->use_driver_rate = true;
 553                 tcb_desc->ratr_index = 7;
 554                 tcb_desc->disable_ratefallback = 1;
 555                 tcb_desc->mac_id = 0;
 556
 557                 tcb_desc->hw_rate = rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
 558         }
 559 }
 560 EXPORT_SYMBOL(rtl_get_tcb_desc);
 561
 562 bool rtl_tx_mgmt_proc(struct ieee80211_hw *hw, struct sk_buff *skb)
 563 {
 564         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 565         struct rtl_priv *rtlpriv = rtl_priv(hw);
 566         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 567         __le16 fc = hdr->frame_control;
 568
 569         if (ieee80211_is_auth(fc)) {
 570                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, ("MAC80211_LINKING\n"));
 571                 rtl_ips_nic_on(hw);
 572
 573                 mac->link_state = MAC80211_LINKING;
 574         }
 575
 576         return true;
 577 }
 578
 579 bool rtl_action_proc(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 580 {
 581         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 582         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 583         struct rtl_priv *rtlpriv = rtl_priv(hw);
 584         __le16 fc = hdr->frame_control;
 585         u8 *act = (u8 *) (((u8 *) skb->data + MAC80211_3ADDR_LEN));
 586         u8 category;
 587
 588         if (!ieee80211_is_action(fc))
 589                 return true;
 590
 591         category = *act;
 592         act++;
 593         switch (category) {
 594         case ACT_CAT_BA:
 595                 switch (*act) {
 596                 case ACT_ADDBAREQ:
 597                         if (mac->act_scanning)
 598                                 return false;
 599
 600                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 601                                  ("%s ACT_ADDBAREQ From :" MAC_FMT "\n",
 602                                   is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
 603                         break;
 604                 case ACT_ADDBARSP:
 605                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 606                                  ("%s ACT_ADDBARSP From :" MAC_FMT "\n",
 607                                   is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
 608                         break;
 609                 case ACT_DELBA:
 610                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 611                                  ("ACT_ADDBADEL From :" MAC_FMT "\n",
 612                                   MAC_ARG(hdr->addr2)));
 613                         break;
 614                 }
 615                 break;
 616         default:
 617                 break;
 618         }
 619
 620         return true;
 621 }
 622
 623 /*should call before software enc*/
 624 u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 625 {
 626         struct rtl_priv *rtlpriv = rtl_priv(hw);
 627         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 628         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 629         __le16 fc = hdr->frame_control;
 630         u16 ether_type;
 631         u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
 632         const struct iphdr *ip;
 633
 634         if (!ieee80211_is_data(fc))
 635                 return false;
 636
 637         if (ieee80211_is_nullfunc(fc))
 638                 return true;
 639
 640         ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len +
 641                               SNAP_SIZE + PROTOC_TYPE_SIZE);
 642         ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE);
 643
 644         if (ETH_P_IP == ether_type) {
 645                 if (IPPROTO_UDP == ip->protocol) {
 646                         struct udphdr *udp = (struct udphdr *)((u8 *) ip +
 647                                                                (ip->ihl << 2));
 648                         if (((((u8 *) udp)[1] == 68) &&
 649                              (((u8 *) udp)[3] == 67)) ||
 650                             ((((u8 *) udp)[1] == 67) &&
 651                              (((u8 *) udp)[3] == 68))) {
 652                                 /*
 653                                  * 68 : UDP BOOTP client
 654                                  * 67 : UDP BOOTP server
 655                                  */
 656                                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
 657                                          DBG_DMESG, ("dhcp %s !!\n",
 658                                                      (is_tx) ? "Tx" : "Rx"));
 659
 660                                 if (is_tx) {
 661                                         rtl_lps_leave(hw);
 662                                         ppsc->last_delaylps_stamp_jiffies =
 663                                             jiffies;
 664                                 }
 665
 666                                 return true;
 667                         }
 668                 }
 669         } else if (ETH_P_ARP == ether_type) {
 670                 if (is_tx) {
 671                         rtl_lps_leave(hw);
 672                         ppsc->last_delaylps_stamp_jiffies = jiffies;
 673                 }
 674
 675                 return true;
 676         } else if (ETH_P_PAE == ether_type) {
 677                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 678                          ("802.1X %s EAPOL pkt!!\n", (is_tx) ? "Tx" : "Rx"));
 679
 680                 if (is_tx) {
 681                         rtl_lps_leave(hw);
 682                         ppsc->last_delaylps_stamp_jiffies = jiffies;
 683                 }
 684
 685                 return true;
 686         } else if (ETH_P_IPV6 == ether_type) {
 687                 /* IPv6 */
 688                 return true;
 689         }
 690
 691         return false;
 692 }
 693
 694 /*********************************************************
 695  *
 696  * functions called by core.c
 697  *
 698  *********************************************************/
 699 int rtl_tx_agg_start(struct ieee80211_hw *hw, const u8 *ra, u16 tid, u16 *ssn)
 700 {
 701         struct rtl_priv *rtlpriv = rtl_priv(hw);
 702         struct rtl_tid_data *tid_data;
 703         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 704
 705         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
 706                  ("on ra = %pM tid = %d\n", ra, tid));
 707
 708         if (unlikely(tid >= MAX_TID_COUNT))
 709                 return -EINVAL;
 710
 711         if (mac->tids[tid].agg.agg_state != RTL_AGG_OFF) {
 712                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 713                          ("Start AGG when state is not RTL_AGG_OFF !\n"));
 714                 return -ENXIO;
 715         }
 716
 717         tid_data = &mac->tids[tid];
 718         *ssn = SEQ_TO_SN(tid_data->seq_number);
 719
 720         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
 721                  ("HW queue is empty tid:%d\n", tid));
 722         tid_data->agg.agg_state = RTL_AGG_ON;
 723
 724         ieee80211_start_tx_ba_cb_irqsafe(mac->vif, ra, tid);
 725
 726         return 0;
 727 }
 728
 729 int rtl_tx_agg_stop(struct ieee80211_hw *hw, const u8 * ra, u16 tid)
 730 {
 731         int ssn = -1;
 732         struct rtl_priv *rtlpriv = rtl_priv(hw);
 733         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 734         struct rtl_tid_data *tid_data;
 735
 736         if (!ra) {
 737                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("ra = NULL\n"));
 738                 return -EINVAL;
 739         }
 740
 741         if (unlikely(tid >= MAX_TID_COUNT))
 742                 return -EINVAL;
 743
 744         if (mac->tids[tid].agg.agg_state != RTL_AGG_ON)
 745                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 746                          ("Stopping AGG while state not ON or starting\n"));
 747
 748         tid_data = &mac->tids[tid];
 749         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
 750
 751         mac->tids[tid].agg.agg_state = RTL_AGG_OFF;
 752
 753         ieee80211_stop_tx_ba_cb_irqsafe(mac->vif, ra, tid);
 754
 755         return 0;
 756 }
 757
 758 /*********************************************************
 759  *
 760  * wq & timer callback functions
 761  *
 762  *********************************************************/
 763 void rtl_watchdog_wq_callback(void *data)
 764 {
 765         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
 766                                                             struct rtl_works,
 767                                                             watchdog_wq);
 768         struct ieee80211_hw *hw = rtlworks->hw;
 769         struct rtl_priv *rtlpriv = rtl_priv(hw);
 770         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 771         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 772
 773         bool busytraffic = false;
 774         bool higher_busytraffic = false;
 775         bool higher_busyrxtraffic = false;
 776         bool higher_busytxtraffic = false;
 777
 778         u8 idx = 0;
 779         u32 rx_cnt_inp4eriod = 0;
 780         u32 tx_cnt_inp4eriod = 0;
 781         u32 aver_rx_cnt_inperiod = 0;
 782         u32 aver_tx_cnt_inperiod = 0;
 783
 784         bool enter_ps = false;
 785
 786         if (is_hal_stop(rtlhal))
 787                 return;
 788
 789         /* <1> Determine if action frame is allowed */
 790         if (mac->link_state > MAC80211_NOLINK) {
 791                 if (mac->cnt_after_linked < 20)
 792                         mac->cnt_after_linked++;
 793         } else {
 794                 mac->cnt_after_linked = 0;
 795         }
 796
 797         /* <2> DM */
 798         rtlpriv->cfg->ops->dm_watchdog(hw);
 799
 800         /*
 801          *<3> to check if traffic busy, if
 802          * busytraffic we don't change channel
 803          */
 804         if (mac->link_state >= MAC80211_LINKED) {
 805
 806                 /* (1) get aver_rx_cnt_inperiod & aver_tx_cnt_inperiod */
 807                 for (idx = 0; idx <= 2; idx++) {
 808                         rtlpriv->link_info.num_rx_in4period[idx] =
 809                             rtlpriv->link_info.num_rx_in4period[idx + 1];
 810                         rtlpriv->link_info.num_tx_in4period[idx] =
 811                             rtlpriv->link_info.num_tx_in4period[idx + 1];
 812                 }
 813                 rtlpriv->link_info.num_rx_in4period[3] =
 814                     rtlpriv->link_info.num_rx_inperiod;
 815                 rtlpriv->link_info.num_tx_in4period[3] =
 816                     rtlpriv->link_info.num_tx_inperiod;
 817                 for (idx = 0; idx <= 3; idx++) {
 818                         rx_cnt_inp4eriod +=
 819                             rtlpriv->link_info.num_rx_in4period[idx];
 820                         tx_cnt_inp4eriod +=
 821                             rtlpriv->link_info.num_tx_in4period[idx];
 822                 }
 823                 aver_rx_cnt_inperiod = rx_cnt_inp4eriod / 4;
 824                 aver_tx_cnt_inperiod = tx_cnt_inp4eriod / 4;
 825
 826                 /* (2) check traffic busy */
 827                 if (aver_rx_cnt_inperiod > 100 || aver_tx_cnt_inperiod > 100)
 828                         busytraffic = true;
 829
 830                 /* Higher Tx/Rx data. */
 831                 if (aver_rx_cnt_inperiod > 4000 ||
 832                     aver_tx_cnt_inperiod > 4000) {
 833                         higher_busytraffic = true;
 834
 835                         /* Extremely high Rx data. */
 836                         if (aver_rx_cnt_inperiod > 5000)
 837                                 higher_busyrxtraffic = true;
 838                         else
 839                                 higher_busytxtraffic = false;
 840                 }
 841
 842                 if (((rtlpriv->link_info.num_rx_inperiod +
 843                       rtlpriv->link_info.num_tx_inperiod) > 8) ||
 844                     (rtlpriv->link_info.num_rx_inperiod > 2))
 845                         enter_ps = false;
 846                 else
 847                         enter_ps = true;
 848
 849                 /* LeisurePS only work in infra mode. */
 850                 if (enter_ps)
 851                         rtl_lps_enter(hw);
 852                 else
 853                         rtl_lps_leave(hw);
 854         }
 855
 856         rtlpriv->link_info.num_rx_inperiod = 0;
 857         rtlpriv->link_info.num_tx_inperiod = 0;
 858
 859         rtlpriv->link_info.busytraffic = busytraffic;
 860         rtlpriv->link_info.higher_busytraffic = higher_busytraffic;
 861         rtlpriv->link_info.higher_busyrxtraffic = higher_busyrxtraffic;
 862
 863 }
 864
 865 void rtl_watch_dog_timer_callback(unsigned long data)
 866 {
 867         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
 868         struct rtl_priv *rtlpriv = rtl_priv(hw);
 869
 870         queue_delayed_work(rtlpriv->works.rtl_wq,
 871                            &rtlpriv->works.watchdog_wq, 0);
 872
 873         mod_timer(&rtlpriv->works.watchdog_timer,
 874                   jiffies + MSECS(RTL_WATCH_DOG_TIME));
 875 }
 876
 877 /*********************************************************
 878  *
 879  * sysfs functions
 880  *
 881  *********************************************************/
 882 static ssize_t rtl_show_debug_level(struct device *d,
 883                                     struct device_attribute *attr, char *buf)
 884 {
 885         struct ieee80211_hw *hw = dev_get_drvdata(d);
 886         struct rtl_priv *rtlpriv = rtl_priv(hw);
 887
 888         return sprintf(buf, "0x%08X\n", rtlpriv->dbg.global_debuglevel);
 889 }
 890
 891 static ssize_t rtl_store_debug_level(struct device *d,
 892                                      struct device_attribute *attr,
 893                                      const char *buf, size_t count)
 894 {
 895         struct ieee80211_hw *hw = dev_get_drvdata(d);
 896         struct rtl_priv *rtlpriv = rtl_priv(hw);
 897         unsigned long val;
 898         int ret;
 899
 900         ret = strict_strtoul(buf, 0, &val);
 901         if (ret) {
 902                 printk(KERN_DEBUG "%s is not in hex or decimal form.\n", buf);
 903         } else {
 904                 rtlpriv->dbg.global_debuglevel = val;
 905                 printk(KERN_DEBUG "debuglevel:%x\n",
 906                        rtlpriv->dbg.global_debuglevel);
 907         }
 908
 909         return strnlen(buf, count);
 910 }
 911
 912 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
 913                    rtl_show_debug_level, rtl_store_debug_level);
 914
 915 static struct attribute *rtl_sysfs_entries[] = {
 916
 917         &dev_attr_debug_level.attr,
 918
 919         NULL
 920 };
 921
 922 /*
 923  * "name" is folder name witch will be
 924  * put in device directory like :
 925  * sys/devices/pci0000:00/0000:00:1c.4/
 926  * 0000:06:00.0/rtl_sysfs
 927  */
 928 struct attribute_group rtl_attribute_group = {
 929         .name = "rtlsysfs",
 930         .attrs = rtl_sysfs_entries,
 931 };
 932
 933 MODULE_AUTHOR("lizhaoming       <chaoming_li@realsil.com.cn>");
 934 MODULE_AUTHOR("Realtek WlanFAE  <wlanfae@realtek.com>");
 935 MODULE_AUTHOR("Larry Finger     <Larry.FInger@lwfinger.net>");
 936 MODULE_LICENSE("GPL");
 937 MODULE_DESCRIPTION("Realtek 802.11n PCI wireless core");
 938
 939 static int __init rtl_core_module_init(void)
 940 {
 941         if (rtl_rate_control_register())
 942                 printk(KERN_ERR "rtlwifi: Unable to register rtl_rc,"
 943                        "use default RC !!\n");
 944         return 0;
 945 }
 946
 947 static void __exit rtl_core_module_exit(void)
 948 {
 949          /*RC*/
 950         rtl_rate_control_unregister();
 951 }
 952
 953 module_init(rtl_core_module_init);
 954 module_exit(rtl_core_module_exit);