drivers/net/wireless/rsi/rsi_91x_mac80211.c

   1 /**
   2  * Copyright (c) 2014 Redpine Signals Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/etherdevice.h>
  18 #include "rsi_debugfs.h"
  19 #include "rsi_mgmt.h"
  20 #include "rsi_sdio.h"
  21 #include "rsi_common.h"
  22 #include "rsi_ps.h"
  23
  24 static const struct ieee80211_channel rsi_2ghz_channels[] = {
  25         { .band = NL80211_BAND_2GHZ, .center_freq = 2412,
  26           .hw_value = 1 }, /* Channel 1 */
  27         { .band = NL80211_BAND_2GHZ, .center_freq = 2417,
  28           .hw_value = 2 }, /* Channel 2 */
  29         { .band = NL80211_BAND_2GHZ, .center_freq = 2422,
  30           .hw_value = 3 }, /* Channel 3 */
  31         { .band = NL80211_BAND_2GHZ, .center_freq = 2427,
  32           .hw_value = 4 }, /* Channel 4 */
  33         { .band = NL80211_BAND_2GHZ, .center_freq = 2432,
  34           .hw_value = 5 }, /* Channel 5 */
  35         { .band = NL80211_BAND_2GHZ, .center_freq = 2437,
  36           .hw_value = 6 }, /* Channel 6 */
  37         { .band = NL80211_BAND_2GHZ, .center_freq = 2442,
  38           .hw_value = 7 }, /* Channel 7 */
  39         { .band = NL80211_BAND_2GHZ, .center_freq = 2447,
  40           .hw_value = 8 }, /* Channel 8 */
  41         { .band = NL80211_BAND_2GHZ, .center_freq = 2452,
  42           .hw_value = 9 }, /* Channel 9 */
  43         { .band = NL80211_BAND_2GHZ, .center_freq = 2457,
  44           .hw_value = 10 }, /* Channel 10 */
  45         { .band = NL80211_BAND_2GHZ, .center_freq = 2462,
  46           .hw_value = 11 }, /* Channel 11 */
  47         { .band = NL80211_BAND_2GHZ, .center_freq = 2467,
  48           .hw_value = 12 }, /* Channel 12 */
  49         { .band = NL80211_BAND_2GHZ, .center_freq = 2472,
  50           .hw_value = 13 }, /* Channel 13 */
  51         { .band = NL80211_BAND_2GHZ, .center_freq = 2484,
  52           .hw_value = 14 }, /* Channel 14 */
  53 };
  54
  55 static const struct ieee80211_channel rsi_5ghz_channels[] = {
  56         { .band = NL80211_BAND_5GHZ, .center_freq = 5180,
  57           .hw_value = 36,  }, /* Channel 36 */
  58         { .band = NL80211_BAND_5GHZ, .center_freq = 5200,
  59           .hw_value = 40, }, /* Channel 40 */
  60         { .band = NL80211_BAND_5GHZ, .center_freq = 5220,
  61           .hw_value = 44, }, /* Channel 44 */
  62         { .band = NL80211_BAND_5GHZ, .center_freq = 5240,
  63           .hw_value = 48, }, /* Channel 48 */
  64         { .band = NL80211_BAND_5GHZ, .center_freq = 5260,
  65           .hw_value = 52, }, /* Channel 52 */
  66         { .band = NL80211_BAND_5GHZ, .center_freq = 5280,
  67           .hw_value = 56, }, /* Channel 56 */
  68         { .band = NL80211_BAND_5GHZ, .center_freq = 5300,
  69           .hw_value = 60, }, /* Channel 60 */
  70         { .band = NL80211_BAND_5GHZ, .center_freq = 5320,
  71           .hw_value = 64, }, /* Channel 64 */
  72         { .band = NL80211_BAND_5GHZ, .center_freq = 5500,
  73           .hw_value = 100, }, /* Channel 100 */
  74         { .band = NL80211_BAND_5GHZ, .center_freq = 5520,
  75           .hw_value = 104, }, /* Channel 104 */
  76         { .band = NL80211_BAND_5GHZ, .center_freq = 5540,
  77           .hw_value = 108, }, /* Channel 108 */
  78         { .band = NL80211_BAND_5GHZ, .center_freq = 5560,
  79           .hw_value = 112, }, /* Channel 112 */
  80         { .band = NL80211_BAND_5GHZ, .center_freq = 5580,
  81           .hw_value = 116, }, /* Channel 116 */
  82         { .band = NL80211_BAND_5GHZ, .center_freq = 5600,
  83           .hw_value = 120, }, /* Channel 120 */
  84         { .band = NL80211_BAND_5GHZ, .center_freq = 5620,
  85           .hw_value = 124, }, /* Channel 124 */
  86         { .band = NL80211_BAND_5GHZ, .center_freq = 5640,
  87           .hw_value = 128, }, /* Channel 128 */
  88         { .band = NL80211_BAND_5GHZ, .center_freq = 5660,
  89           .hw_value = 132, }, /* Channel 132 */
  90         { .band = NL80211_BAND_5GHZ, .center_freq = 5680,
  91           .hw_value = 136, }, /* Channel 136 */
  92         { .band = NL80211_BAND_5GHZ, .center_freq = 5700,
  93           .hw_value = 140, }, /* Channel 140 */
  94         { .band = NL80211_BAND_5GHZ, .center_freq = 5745,
  95           .hw_value = 149, }, /* Channel 149 */
  96         { .band = NL80211_BAND_5GHZ, .center_freq = 5765,
  97           .hw_value = 153, }, /* Channel 153 */
  98         { .band = NL80211_BAND_5GHZ, .center_freq = 5785,
  99           .hw_value = 157, }, /* Channel 157 */
 100         { .band = NL80211_BAND_5GHZ, .center_freq = 5805,
 101           .hw_value = 161, }, /* Channel 161 */
 102         { .band = NL80211_BAND_5GHZ, .center_freq = 5825,
 103           .hw_value = 165, }, /* Channel 165 */
 104 };
 105
 106 struct ieee80211_rate rsi_rates[12] = {
 107         { .bitrate = STD_RATE_01  * 5, .hw_value = RSI_RATE_1 },
 108         { .bitrate = STD_RATE_02  * 5, .hw_value = RSI_RATE_2 },
 109         { .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 },
 110         { .bitrate = STD_RATE_11  * 5, .hw_value = RSI_RATE_11 },
 111         { .bitrate = STD_RATE_06  * 5, .hw_value = RSI_RATE_6 },
 112         { .bitrate = STD_RATE_09  * 5, .hw_value = RSI_RATE_9 },
 113         { .bitrate = STD_RATE_12  * 5, .hw_value = RSI_RATE_12 },
 114         { .bitrate = STD_RATE_18  * 5, .hw_value = RSI_RATE_18 },
 115         { .bitrate = STD_RATE_24  * 5, .hw_value = RSI_RATE_24 },
 116         { .bitrate = STD_RATE_36  * 5, .hw_value = RSI_RATE_36 },
 117         { .bitrate = STD_RATE_48  * 5, .hw_value = RSI_RATE_48 },
 118         { .bitrate = STD_RATE_54  * 5, .hw_value = RSI_RATE_54 },
 119 };
 120
 121 const u16 rsi_mcsrates[8] = {
 122         RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3,
 123         RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7
 124 };
 125
 126 static const u32 rsi_max_ap_stas[16] = {
 127         32,     /* 1 - Wi-Fi alone */
 128         0,      /* 2 */
 129         0,      /* 3 */
 130         0,      /* 4 - BT EDR alone */
 131         4,      /* 5 - STA + BT EDR */
 132         32,     /* 6 - AP + BT EDR */
 133         0,      /* 7 */
 134         0,      /* 8 - BT LE alone */
 135         4,      /* 9 - STA + BE LE */
 136         0,      /* 10 */
 137         0,      /* 11 */
 138         0,      /* 12 */
 139         1,      /* 13 - STA + BT Dual */
 140         4,      /* 14 - AP + BT Dual */
 141 };
 142
 143 static const struct ieee80211_iface_limit rsi_iface_limits[] = {
 144         {
 145                 .max = 1,
 146                 .types = BIT(NL80211_IFTYPE_STATION),
 147         },
 148         {
 149                 .max = 1,
 150                 .types = BIT(NL80211_IFTYPE_AP) |
 151                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 152                         BIT(NL80211_IFTYPE_P2P_GO),
 153         },
 154         {
 155                 .max = 1,
 156                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 157         },
 158 };
 159
 160 static const struct ieee80211_iface_combination rsi_iface_combinations[] = {
 161         {
 162                 .num_different_channels = 1,
 163                 .max_interfaces = 3,
 164                 .limits = rsi_iface_limits,
 165                 .n_limits = ARRAY_SIZE(rsi_iface_limits),
 166         },
 167 };
 168
 169 /**
 170  * rsi_is_cipher_wep() -  This function determines if the cipher is WEP or not.
 171  * @common: Pointer to the driver private structure.
 172  *
 173  * Return: If cipher type is WEP, a value of 1 is returned, else 0.
 174  */
 175
 176 bool rsi_is_cipher_wep(struct rsi_common *common)
 177 {
 178         if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) ||
 179              (common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) &&
 180             (!common->secinfo.ptk_cipher))
 181                 return true;
 182         else
 183                 return false;
 184 }
 185
 186 /**
 187  * rsi_register_rates_channels() - This function registers channels and rates.
 188  * @adapter: Pointer to the adapter structure.
 189  * @band: Operating band to be set.
 190  *
 191  * Return: int - 0 on success, negative error on failure.
 192  */
 193 static int rsi_register_rates_channels(struct rsi_hw *adapter, int band)
 194 {
 195         struct ieee80211_supported_band *sbands = &adapter->sbands[band];
 196         void *channels = NULL;
 197
 198         if (band == NL80211_BAND_2GHZ) {
 199                 channels = kmemdup(rsi_2ghz_channels, sizeof(rsi_2ghz_channels),
 200                                    GFP_KERNEL);
 201                 if (!channels)
 202                         return -ENOMEM;
 203                 sbands->band = NL80211_BAND_2GHZ;
 204                 sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels);
 205                 sbands->bitrates = rsi_rates;
 206                 sbands->n_bitrates = ARRAY_SIZE(rsi_rates);
 207         } else {
 208                 channels = kmemdup(rsi_5ghz_channels, sizeof(rsi_5ghz_channels),
 209                                    GFP_KERNEL);
 210                 if (!channels)
 211                         return -ENOMEM;
 212                 sbands->band = NL80211_BAND_5GHZ;
 213                 sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels);
 214                 sbands->bitrates = &rsi_rates[4];
 215                 sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4;
 216         }
 217
 218         sbands->channels = channels;
 219
 220         memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap));
 221         sbands->ht_cap.ht_supported = true;
 222         sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 223                               IEEE80211_HT_CAP_SGI_20 |
 224                               IEEE80211_HT_CAP_SGI_40);
 225         sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K;
 226         sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
 227         sbands->ht_cap.mcs.rx_mask[0] = 0xff;
 228         sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 229         /* sbands->ht_cap.mcs.rx_highest = 0x82; */
 230         return 0;
 231 }
 232
 233 /**
 234  * rsi_mac80211_detach() - This function is used to de-initialize the
 235  *                         Mac80211 stack.
 236  * @adapter: Pointer to the adapter structure.
 237  *
 238  * Return: None.
 239  */
 240 void rsi_mac80211_detach(struct rsi_hw *adapter)
 241 {
 242         struct ieee80211_hw *hw = adapter->hw;
 243         enum nl80211_band band;
 244
 245         if (hw) {
 246                 ieee80211_stop_queues(hw);
 247                 ieee80211_unregister_hw(hw);
 248                 ieee80211_free_hw(hw);
 249                 adapter->hw = NULL;
 250         }
 251
 252         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 253                 struct ieee80211_supported_band *sband =
 254                                         &adapter->sbands[band];
 255
 256                 kfree(sband->channels);
 257         }
 258
 259 #ifdef CONFIG_RSI_DEBUGFS
 260         rsi_remove_dbgfs(adapter);
 261         kfree(adapter->dfsentry);
 262 #endif
 263 }
 264 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
 265
 266 /**
 267  * rsi_indicate_tx_status() - This function indicates the transmit status.
 268  * @adapter: Pointer to the adapter structure.
 269  * @skb: Pointer to the socket buffer structure.
 270  * @status: Status
 271  *
 272  * Return: None.
 273  */
 274 void rsi_indicate_tx_status(struct rsi_hw *adapter,
 275                             struct sk_buff *skb,
 276                             int status)
 277 {
 278         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 279         struct skb_info *tx_params;
 280
 281         if (!adapter->hw) {
 282                 rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
 283                 return;
 284         }
 285
 286         if (!status)
 287                 info->flags |= IEEE80211_TX_STAT_ACK;
 288
 289         tx_params = (struct skb_info *)info->driver_data;
 290         skb_pull(skb, tx_params->internal_hdr_size);
 291         memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
 292
 293         ieee80211_tx_status_irqsafe(adapter->hw, skb);
 294 }
 295
 296 /**
 297  * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
 298  *                     transmitted frame.SKB contains the buffer starting
 299  *                     from the IEEE 802.11 header.
 300  * @hw: Pointer to the ieee80211_hw structure.
 301  * @control: Pointer to the ieee80211_tx_control structure
 302  * @skb: Pointer to the socket buffer structure.
 303  *
 304  * Return: None
 305  */
 306 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
 307                             struct ieee80211_tx_control *control,
 308                             struct sk_buff *skb)
 309 {
 310         struct rsi_hw *adapter = hw->priv;
 311         struct rsi_common *common = adapter->priv;
 312
 313         rsi_core_xmit(common, skb);
 314 }
 315
 316 /**
 317  * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
 318  *                        the driver init is complete by then, just
 319  *                        returns success.
 320  * @hw: Pointer to the ieee80211_hw structure.
 321  *
 322  * Return: 0 as success.
 323  */
 324 static int rsi_mac80211_start(struct ieee80211_hw *hw)
 325 {
 326         struct rsi_hw *adapter = hw->priv;
 327         struct rsi_common *common = adapter->priv;
 328
 329         rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
 330         mutex_lock(&common->mutex);
 331         if (common->hibernate_resume) {
 332                 common->reinit_hw = true;
 333                 adapter->host_intf_ops->reinit_device(adapter);
 334                 wait_for_completion(&adapter->priv->wlan_init_completion);
 335         }
 336         common->iface_down = false;
 337         wiphy_rfkill_start_polling(hw->wiphy);
 338         rsi_send_rx_filter_frame(common, 0);
 339         mutex_unlock(&common->mutex);
 340
 341         return 0;
 342 }
 343
 344 /**
 345  * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
 346  * @hw: Pointer to the ieee80211_hw structure.
 347  *
 348  * Return: None.
 349  */
 350 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
 351 {
 352         struct rsi_hw *adapter = hw->priv;
 353         struct rsi_common *common = adapter->priv;
 354
 355         rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
 356         mutex_lock(&common->mutex);
 357         common->iface_down = true;
 358         wiphy_rfkill_stop_polling(hw->wiphy);
 359
 360         /* Block all rx frames */
 361         rsi_send_rx_filter_frame(common, 0xffff);
 362
 363         mutex_unlock(&common->mutex);
 364 }
 365
 366 static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
 367 {
 368         switch (vif_type) {
 369         case NL80211_IFTYPE_STATION:
 370                 return RSI_OPMODE_STA;
 371         case NL80211_IFTYPE_AP:
 372                 return RSI_OPMODE_AP;
 373         case NL80211_IFTYPE_P2P_DEVICE:
 374                 return RSI_OPMODE_P2P_CLIENT;
 375         case NL80211_IFTYPE_P2P_CLIENT:
 376                 return RSI_OPMODE_P2P_CLIENT;
 377         case NL80211_IFTYPE_P2P_GO:
 378                 return RSI_OPMODE_P2P_GO;
 379         default:
 380                 return RSI_OPMODE_UNSUPPORTED;
 381         }
 382 }
 383
 384 /**
 385  * rsi_mac80211_add_interface() - This function is called when a netdevice
 386  *                                attached to the hardware is enabled.
 387  * @hw: Pointer to the ieee80211_hw structure.
 388  * @vif: Pointer to the ieee80211_vif structure.
 389  *
 390  * Return: ret: 0 on success, negative error code on failure.
 391  */
 392 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
 393                                       struct ieee80211_vif *vif)
 394 {
 395         struct rsi_hw *adapter = hw->priv;
 396         struct rsi_common *common = adapter->priv;
 397         struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 398         enum opmode intf_mode;
 399         enum vap_status vap_status;
 400         int vap_idx = -1, i;
 401
 402         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
 403         mutex_lock(&common->mutex);
 404
 405         intf_mode = rsi_map_intf_mode(vif->type);
 406         if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
 407                 rsi_dbg(ERR_ZONE,
 408                         "%s: Interface type %d not supported\n", __func__,
 409                         vif->type);
 410                 mutex_unlock(&common->mutex);
 411                 return -EOPNOTSUPP;
 412         }
 413         if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
 414             (vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
 415             (vif->type == NL80211_IFTYPE_P2P_GO))
 416                 common->p2p_enabled = true;
 417
 418         /* Get free vap index */
 419         for (i = 0; i < RSI_MAX_VIFS; i++) {
 420                 if (!adapter->vifs[i] ||
 421                     !memcmp(vif->addr, adapter->vifs[i]->addr, ETH_ALEN)) {
 422                         vap_idx = i;
 423                         break;
 424                 }
 425         }
 426         if (vap_idx < 0) {
 427                 rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
 428                 mutex_unlock(&common->mutex);
 429                 return -EOPNOTSUPP;
 430         }
 431         vif_info->vap_id = vap_idx;
 432         adapter->vifs[vap_idx] = vif;
 433         adapter->sc_nvifs++;
 434         vap_status = VAP_ADD;
 435
 436         if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
 437                                      vif_info->vap_id, vap_status)) {
 438                 rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
 439                 mutex_unlock(&common->mutex);
 440                 return -EINVAL;
 441         }
 442
 443         if ((vif->type == NL80211_IFTYPE_AP) ||
 444             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 445                 rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
 446                 common->min_rate = RSI_RATE_AUTO;
 447                 for (i = 0; i < common->max_stations; i++)
 448                         common->stations[i].sta = NULL;
 449         }
 450
 451         mutex_unlock(&common->mutex);
 452
 453         return 0;
 454 }
 455
 456 /**
 457  * rsi_mac80211_remove_interface() - This function notifies driver that an
 458  *                                   interface is going down.
 459  * @hw: Pointer to the ieee80211_hw structure.
 460  * @vif: Pointer to the ieee80211_vif structure.
 461  *
 462  * Return: None.
 463  */
 464 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
 465                                           struct ieee80211_vif *vif)
 466 {
 467         struct rsi_hw *adapter = hw->priv;
 468         struct rsi_common *common = adapter->priv;
 469         enum opmode opmode;
 470         int i;
 471
 472         rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
 473
 474         mutex_lock(&common->mutex);
 475
 476         if (adapter->sc_nvifs <= 0) {
 477                 mutex_unlock(&common->mutex);
 478                 return;
 479         }
 480
 481         opmode = rsi_map_intf_mode(vif->type);
 482         if (opmode == RSI_OPMODE_UNSUPPORTED) {
 483                 rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
 484                 mutex_unlock(&common->mutex);
 485                 return;
 486         }
 487         for (i = 0; i < RSI_MAX_VIFS; i++) {
 488                 if (!adapter->vifs[i])
 489                         continue;
 490                 if (vif == adapter->vifs[i]) {
 491                         rsi_set_vap_capabilities(common, opmode, vif->addr,
 492                                                  i, VAP_DELETE);
 493                         adapter->sc_nvifs--;
 494                         adapter->vifs[i] = NULL;
 495                 }
 496         }
 497         mutex_unlock(&common->mutex);
 498 }
 499
 500 /**
 501  * rsi_channel_change() - This function is a performs the checks
 502  *                        required for changing a channel and sets
 503  *                        the channel accordingly.
 504  * @hw: Pointer to the ieee80211_hw structure.
 505  *
 506  * Return: 0 on success, negative error code on failure.
 507  */
 508 static int rsi_channel_change(struct ieee80211_hw *hw)
 509 {
 510         struct rsi_hw *adapter = hw->priv;
 511         struct rsi_common *common = adapter->priv;
 512         int status = -EOPNOTSUPP;
 513         struct ieee80211_channel *curchan = hw->conf.chandef.chan;
 514         u16 channel = curchan->hw_value;
 515         struct ieee80211_vif *vif;
 516         struct ieee80211_bss_conf *bss;
 517         bool assoc = false;
 518         int i;
 519
 520         rsi_dbg(INFO_ZONE,
 521                 "%s: Set channel: %d MHz type: %d channel_no %d\n",
 522                 __func__, curchan->center_freq,
 523                 curchan->flags, channel);
 524
 525         for (i = 0; i < RSI_MAX_VIFS; i++) {
 526                 vif = adapter->vifs[i];
 527                 if (!vif)
 528                         continue;
 529                 if (vif->type == NL80211_IFTYPE_STATION) {
 530                         bss = &vif->bss_conf;
 531                         if (bss->assoc) {
 532                                 assoc = true;
 533                                 break;
 534                         }
 535                 }
 536         }
 537         if (assoc) {
 538                 if (!common->hw_data_qs_blocked &&
 539                     (rsi_get_connected_channel(vif) != channel)) {
 540                         rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
 541                         if (!rsi_send_block_unblock_frame(common, true))
 542                                 common->hw_data_qs_blocked = true;
 543                 }
 544         }
 545
 546         status = rsi_band_check(common, curchan);
 547         if (!status)
 548                 status = rsi_set_channel(adapter->priv, curchan);
 549
 550         if (assoc) {
 551                 if (common->hw_data_qs_blocked &&
 552                     (rsi_get_connected_channel(vif) == channel)) {
 553                         rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 554                         if (!rsi_send_block_unblock_frame(common, false))
 555                                 common->hw_data_qs_blocked = false;
 556                 }
 557         }
 558
 559         return status;
 560 }
 561
 562 /**
 563  * rsi_config_power() - This function configures tx power to device
 564  * @hw: Pointer to the ieee80211_hw structure.
 565  *
 566  * Return: 0 on success, negative error code on failure.
 567  */
 568 static int rsi_config_power(struct ieee80211_hw *hw)
 569 {
 570         struct rsi_hw *adapter = hw->priv;
 571         struct rsi_common *common = adapter->priv;
 572         struct ieee80211_conf *conf = &hw->conf;
 573
 574         if (adapter->sc_nvifs <= 0) {
 575                 rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
 576                 return -EINVAL;
 577         }
 578
 579         rsi_dbg(INFO_ZONE,
 580                 "%s: Set tx power: %d dBM\n", __func__, conf->power_level);
 581
 582         if (conf->power_level == common->tx_power)
 583                 return 0;
 584
 585         common->tx_power = conf->power_level;
 586
 587         return rsi_send_radio_params_update(common);
 588 }
 589
 590 /**
 591  * rsi_mac80211_config() - This function is a handler for configuration
 592  *                         requests. The stack calls this function to
 593  *                         change hardware configuration, e.g., channel.
 594  * @hw: Pointer to the ieee80211_hw structure.
 595  * @changed: Changed flags set.
 596  *
 597  * Return: 0 on success, negative error code on failure.
 598  */
 599 static int rsi_mac80211_config(struct ieee80211_hw *hw,
 600                                u32 changed)
 601 {
 602         struct rsi_hw *adapter = hw->priv;
 603         struct rsi_common *common = adapter->priv;
 604         struct ieee80211_conf *conf = &hw->conf;
 605         int status = -EOPNOTSUPP;
 606
 607         mutex_lock(&common->mutex);
 608
 609         if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
 610                 status = rsi_channel_change(hw);
 611
 612         /* tx power */
 613         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 614                 rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
 615                 status = rsi_config_power(hw);
 616         }
 617
 618         /* Power save parameters */
 619         if (changed & IEEE80211_CONF_CHANGE_PS) {
 620                 struct ieee80211_vif *vif, *sta_vif = NULL;
 621                 unsigned long flags;
 622                 int i, set_ps = 1;
 623
 624                 for (i = 0; i < RSI_MAX_VIFS; i++) {
 625                         vif = adapter->vifs[i];
 626                         if (!vif)
 627                                 continue;
 628                         /* Don't go to power save if AP vap exists */
 629                         if ((vif->type == NL80211_IFTYPE_AP) ||
 630                             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 631                                 set_ps = 0;
 632                                 break;
 633                         }
 634                         if ((vif->type == NL80211_IFTYPE_STATION ||
 635                              vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
 636                             (!sta_vif || vif->bss_conf.assoc))
 637                                 sta_vif = vif;
 638                 }
 639                 if (set_ps && sta_vif) {
 640                         spin_lock_irqsave(&adapter->ps_lock, flags);
 641                         if (conf->flags & IEEE80211_CONF_PS)
 642                                 rsi_enable_ps(adapter, sta_vif);
 643                         else
 644                                 rsi_disable_ps(adapter, sta_vif);
 645                         spin_unlock_irqrestore(&adapter->ps_lock, flags);
 646                 }
 647         }
 648
 649         /* RTS threshold */
 650         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 651                 rsi_dbg(INFO_ZONE, "RTS threshold\n");
 652                 if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
 653                         rsi_dbg(INFO_ZONE,
 654                                 "%s: Sending vap updates....\n", __func__);
 655                         status = rsi_send_vap_dynamic_update(common);
 656                 }
 657         }
 658         mutex_unlock(&common->mutex);
 659
 660         return status;
 661 }
 662
 663 /**
 664  * rsi_get_connected_channel() - This function is used to get the current
 665  *                               connected channel number.
 666  * @adapter: Pointer to the adapter structure.
 667  *
 668  * Return: Current connected AP's channel number is returned.
 669  */
 670 u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
 671 {
 672         struct ieee80211_bss_conf *bss;
 673         struct ieee80211_channel *channel;
 674
 675         if (!vif)
 676                 return 0;
 677
 678         bss = &vif->bss_conf;
 679         channel = bss->chandef.chan;
 680
 681         if (!channel)
 682                 return 0;
 683
 684         return channel->hw_value;
 685 }
 686
 687 static void rsi_switch_channel(struct rsi_hw *adapter,
 688                                struct ieee80211_vif *vif)
 689 {
 690         struct rsi_common *common = adapter->priv;
 691         struct ieee80211_channel *channel;
 692
 693         if (common->iface_down)
 694                 return;
 695         if (!vif)
 696                 return;
 697
 698         channel = vif->bss_conf.chandef.chan;
 699
 700         if (!channel)
 701                 return;
 702
 703         rsi_band_check(common, channel);
 704         rsi_set_channel(common, channel);
 705         rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
 706 }
 707
 708 /**
 709  * rsi_mac80211_bss_info_changed() - This function is a handler for config
 710  *                                   requests related to BSS parameters that
 711  *                                   may vary during BSS's lifespan.
 712  * @hw: Pointer to the ieee80211_hw structure.
 713  * @vif: Pointer to the ieee80211_vif structure.
 714  * @bss_conf: Pointer to the ieee80211_bss_conf structure.
 715  * @changed: Changed flags set.
 716  *
 717  * Return: None.
 718  */
 719 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 720                                           struct ieee80211_vif *vif,
 721                                           struct ieee80211_bss_conf *bss_conf,
 722                                           u32 changed)
 723 {
 724         struct rsi_hw *adapter = hw->priv;
 725         struct rsi_common *common = adapter->priv;
 726         struct ieee80211_bss_conf *bss = &vif->bss_conf;
 727         struct ieee80211_conf *conf = &hw->conf;
 728         u16 rx_filter_word = 0;
 729
 730         mutex_lock(&common->mutex);
 731         if (changed & BSS_CHANGED_ASSOC) {
 732                 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
 733                         __func__, bss_conf->assoc);
 734                 if (bss_conf->assoc) {
 735                         /* Send the RX filter frame */
 736                         rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
 737                                           ALLOW_CTRL_ASSOC_PEER |
 738                                           ALLOW_MGMT_ASSOC_PEER);
 739                         rsi_send_rx_filter_frame(common, rx_filter_word);
 740                 }
 741                 rsi_inform_bss_status(common,
 742                                       RSI_OPMODE_STA,
 743                                       bss_conf->assoc,
 744                                       bss_conf->bssid,
 745                                       bss_conf->qos,
 746                                       bss_conf->aid,
 747                                       NULL, 0,
 748                                       bss_conf->assoc_capability, vif);
 749                 adapter->ps_info.dtim_interval_duration = bss->dtim_period;
 750                 adapter->ps_info.listen_interval = conf->listen_interval;
 751
 752         /* If U-APSD is updated, send ps parameters to firmware */
 753         if (bss->assoc) {
 754                 if (common->uapsd_bitmap) {
 755                         rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
 756                         rsi_conf_uapsd(adapter, vif);
 757                 }
 758         } else {
 759                 common->uapsd_bitmap = 0;
 760         }
 761         }
 762
 763         if (changed & BSS_CHANGED_CQM) {
 764                 common->cqm_info.last_cqm_event_rssi = 0;
 765                 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
 766                 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
 767                 rsi_dbg(INFO_ZONE, "RSSI throld & hysteresis are: %d %d\n",
 768                         common->cqm_info.rssi_thold,
 769                         common->cqm_info.rssi_hyst);
 770         }
 771
 772         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
 773             ((vif->type == NL80211_IFTYPE_AP) ||
 774              (vif->type == NL80211_IFTYPE_P2P_GO))) {
 775                 if (bss->enable_beacon) {
 776                         rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
 777                         common->beacon_enabled = 1;
 778                 } else {
 779                         rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
 780                         common->beacon_enabled = 0;
 781                 }
 782         }
 783
 784         mutex_unlock(&common->mutex);
 785 }
 786
 787 /**
 788  * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
 789  * @hw: Pointer to the ieee80211_hw structure.
 790  * @changed: Changed flags set.
 791  * @total_flags: Total initial flags set.
 792  * @multicast: Multicast.
 793  *
 794  * Return: None.
 795  */
 796 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
 797                                      u32 changed_flags,
 798                                      u32 *total_flags,
 799                                      u64 multicast)
 800 {
 801         /* Not doing much here as of now */
 802         *total_flags &= RSI_SUPP_FILTERS;
 803 }
 804
 805 /**
 806  * rsi_mac80211_conf_tx() - This function configures TX queue parameters
 807  *                          (EDCF (aifs, cw_min, cw_max), bursting)
 808  *                          for a hardware TX queue.
 809  * @hw: Pointer to the ieee80211_hw structure
 810  * @vif: Pointer to the ieee80211_vif structure.
 811  * @queue: Queue number.
 812  * @params: Pointer to ieee80211_tx_queue_params structure.
 813  *
 814  * Return: 0 on success, negative error code on failure.
 815  */
 816 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
 817                                 struct ieee80211_vif *vif, u16 queue,
 818                                 const struct ieee80211_tx_queue_params *params)
 819 {
 820         struct rsi_hw *adapter = hw->priv;
 821         struct rsi_common *common = adapter->priv;
 822         u8 idx = 0;
 823
 824         if (queue >= IEEE80211_NUM_ACS)
 825                 return 0;
 826
 827         rsi_dbg(INFO_ZONE,
 828                 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
 829                 __func__, queue, params->aifs,
 830                 params->cw_min, params->cw_max, params->txop);
 831
 832         mutex_lock(&common->mutex);
 833         /* Map into the way the f/w expects */
 834         switch (queue) {
 835         case IEEE80211_AC_VO:
 836                 idx = VO_Q;
 837                 break;
 838         case IEEE80211_AC_VI:
 839                 idx = VI_Q;
 840                 break;
 841         case IEEE80211_AC_BE:
 842                 idx = BE_Q;
 843                 break;
 844         case IEEE80211_AC_BK:
 845                 idx = BK_Q;
 846                 break;
 847         default:
 848                 idx = BE_Q;
 849                 break;
 850         }
 851
 852         memcpy(&common->edca_params[idx],
 853                params,
 854                sizeof(struct ieee80211_tx_queue_params));
 855
 856         if (params->uapsd)
 857                 common->uapsd_bitmap |= idx;
 858         else
 859                 common->uapsd_bitmap &= (~idx);
 860
 861         mutex_unlock(&common->mutex);
 862
 863         return 0;
 864 }
 865
 866 /**
 867  * rsi_hal_key_config() - This function loads the keys into the firmware.
 868  * @hw: Pointer to the ieee80211_hw structure.
 869  * @vif: Pointer to the ieee80211_vif structure.
 870  * @key: Pointer to the ieee80211_key_conf structure.
 871  *
 872  * Return: status: 0 on success, negative error codes on failure.
 873  */
 874 static int rsi_hal_key_config(struct ieee80211_hw *hw,
 875                               struct ieee80211_vif *vif,
 876                               struct ieee80211_key_conf *key,
 877                               struct ieee80211_sta *sta)
 878 {
 879         struct rsi_hw *adapter = hw->priv;
 880         struct rsi_sta *rsta = NULL;
 881         int status;
 882         u8 key_type;
 883         s16 sta_id = 0;
 884
 885         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 886                 key_type = RSI_PAIRWISE_KEY;
 887         else
 888                 key_type = RSI_GROUP_KEY;
 889
 890         rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
 891                 __func__, key->cipher, key_type, key->keylen);
 892
 893         if ((vif->type == NL80211_IFTYPE_AP) ||
 894             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 895                 if (sta) {
 896                         rsta = rsi_find_sta(adapter->priv, sta->addr);
 897                         if (rsta)
 898                                 sta_id = rsta->sta_id;
 899                 }
 900                 adapter->priv->key = key;
 901         } else {
 902                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
 903                     (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 904                         status = rsi_hal_load_key(adapter->priv,
 905                                                   key->key,
 906                                                   key->keylen,
 907                                                   RSI_PAIRWISE_KEY,
 908                                                   key->keyidx,
 909                                                   key->cipher,
 910                                                   sta_id,
 911                                                   vif);
 912                         if (status)
 913                                 return status;
 914                 }
 915         }
 916
 917         status = rsi_hal_load_key(adapter->priv,
 918                                   key->key,
 919                                   key->keylen,
 920                                   key_type,
 921                                   key->keyidx,
 922                                   key->cipher,
 923                                   sta_id,
 924                                   vif);
 925         if (status)
 926                 return status;
 927
 928         if (vif->type == NL80211_IFTYPE_STATION && key->key &&
 929             (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
 930              key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 931                 if (!rsi_send_block_unblock_frame(adapter->priv, false))
 932                         adapter->priv->hw_data_qs_blocked = false;
 933         }
 934
 935         return 0;
 936 }
 937
 938 /**
 939  * rsi_mac80211_set_key() - This function sets type of key to be loaded.
 940  * @hw: Pointer to the ieee80211_hw structure.
 941  * @cmd: enum set_key_cmd.
 942  * @vif: Pointer to the ieee80211_vif structure.
 943  * @sta: Pointer to the ieee80211_sta structure.
 944  * @key: Pointer to the ieee80211_key_conf structure.
 945  *
 946  * Return: status: 0 on success, negative error code on failure.
 947  */
 948 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
 949                                 enum set_key_cmd cmd,
 950                                 struct ieee80211_vif *vif,
 951                                 struct ieee80211_sta *sta,
 952                                 struct ieee80211_key_conf *key)
 953 {
 954         struct rsi_hw *adapter = hw->priv;
 955         struct rsi_common *common = adapter->priv;
 956         struct security_info *secinfo = &common->secinfo;
 957         int status;
 958
 959         mutex_lock(&common->mutex);
 960         switch (cmd) {
 961         case SET_KEY:
 962                 status = rsi_hal_key_config(hw, vif, key, sta);
 963                 if (status) {
 964                         mutex_unlock(&common->mutex);
 965                         return status;
 966                 }
 967
 968                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 969                         secinfo->ptk_cipher = key->cipher;
 970                 else
 971                         secinfo->gtk_cipher = key->cipher;
 972
 973                 key->hw_key_idx = key->keyidx;
 974                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 975
 976                 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
 977                 break;
 978
 979         case DISABLE_KEY:
 980                 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
 981                 memset(key, 0, sizeof(struct ieee80211_key_conf));
 982                 status = rsi_hal_key_config(hw, vif, key, sta);
 983                 break;
 984
 985         default:
 986                 status = -EOPNOTSUPP;
 987                 break;
 988         }
 989
 990         mutex_unlock(&common->mutex);
 991         return status;
 992 }
 993
 994 /**
 995  * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
 996  *                               the corresponding mlme_action flag and
 997  *                               informs the f/w regarding this.
 998  * @hw: Pointer to the ieee80211_hw structure.
 999  * @vif: Pointer to the ieee80211_vif structure.
1000  * @params: Pointer to A-MPDU action parameters
1001  *
1002  * Return: status: 0 on success, negative error code on failure.
1003  */
1004 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1005                                      struct ieee80211_vif *vif,
1006                                      struct ieee80211_ampdu_params *params)
1007 {
1008         int status = -EOPNOTSUPP;
1009         struct rsi_hw *adapter = hw->priv;
1010         struct rsi_common *common = adapter->priv;
1011         struct rsi_sta *rsta = NULL;
1012         u16 seq_no = 0, seq_start = 0;
1013         u8 ii = 0;
1014         struct ieee80211_sta *sta = params->sta;
1015         u8 sta_id = 0;
1016         enum ieee80211_ampdu_mlme_action action = params->action;
1017         u16 tid = params->tid;
1018         u16 *ssn = &params->ssn;
1019         u8 buf_size = params->buf_size;
1020
1021         for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1022                 if (vif == adapter->vifs[ii])
1023                         break;
1024         }
1025
1026         mutex_lock(&common->mutex);
1027
1028         if (ssn != NULL)
1029                 seq_no = *ssn;
1030
1031         if ((vif->type == NL80211_IFTYPE_AP) ||
1032             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1033                 rsta = rsi_find_sta(common, sta->addr);
1034                 if (!rsta) {
1035                         rsi_dbg(ERR_ZONE, "No station mapped\n");
1036                         status = 0;
1037                         goto unlock;
1038                 }
1039                 sta_id = rsta->sta_id;
1040         }
1041
1042         rsi_dbg(INFO_ZONE,
1043                 "%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1044                 __func__, tid, seq_no, buf_size, sta_id);
1045
1046         switch (action) {
1047         case IEEE80211_AMPDU_RX_START:
1048                 status = rsi_send_aggregation_params_frame(common,
1049                                                            tid,
1050                                                            seq_no,
1051                                                            buf_size,
1052                                                            STA_RX_ADDBA_DONE,
1053                                                            sta_id);
1054                 break;
1055
1056         case IEEE80211_AMPDU_RX_STOP:
1057                 status = rsi_send_aggregation_params_frame(common,
1058                                                            tid,
1059                                                            0,
1060                                                            buf_size,
1061                                                            STA_RX_DELBA,
1062                                                            sta_id);
1063                 break;
1064
1065         case IEEE80211_AMPDU_TX_START:
1066                 if ((vif->type == NL80211_IFTYPE_STATION) ||
1067                     (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1068                         common->vif_info[ii].seq_start = seq_no;
1069                 else if ((vif->type == NL80211_IFTYPE_AP) ||
1070                          (vif->type == NL80211_IFTYPE_P2P_GO))
1071                         rsta->seq_start[tid] = seq_no;
1072                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1073                 status = 0;
1074                 break;
1075
1076         case IEEE80211_AMPDU_TX_STOP_CONT:
1077         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1078         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1079                 status = rsi_send_aggregation_params_frame(common,
1080                                                            tid,
1081                                                            seq_no,
1082                                                            buf_size,
1083                                                            STA_TX_DELBA,
1084                                                            sta_id);
1085                 if (!status)
1086                         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1087                 break;
1088
1089         case IEEE80211_AMPDU_TX_OPERATIONAL:
1090                 if ((vif->type == NL80211_IFTYPE_STATION) ||
1091                     (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1092                         seq_start = common->vif_info[ii].seq_start;
1093                 else if ((vif->type == NL80211_IFTYPE_AP) ||
1094                          (vif->type == NL80211_IFTYPE_P2P_GO))
1095                         seq_start = rsta->seq_start[tid];
1096                 status = rsi_send_aggregation_params_frame(common,
1097                                                            tid,
1098                                                            seq_start,
1099                                                            buf_size,
1100                                                            STA_TX_ADDBA_DONE,
1101                                                            sta_id);
1102                 break;
1103
1104         default:
1105                 rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1106                 break;
1107         }
1108
1109 unlock:
1110         mutex_unlock(&common->mutex);
1111         return status;
1112 }
1113
1114 /**
1115  * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1116  * @hw: Pointer to the ieee80211_hw structure.
1117  * @value: Rts threshold value.
1118  *
1119  * Return: 0 on success.
1120  */
1121 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1122                                           u32 value)
1123 {
1124         struct rsi_hw *adapter = hw->priv;
1125         struct rsi_common *common = adapter->priv;
1126
1127         mutex_lock(&common->mutex);
1128         common->rts_threshold = value;
1129         mutex_unlock(&common->mutex);
1130
1131         return 0;
1132 }
1133
1134 /**
1135  * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1136  * @hw: Pointer to the ieee80211_hw structure
1137  * @vif: Pointer to the ieee80211_vif structure.
1138  * @mask: Pointer to the cfg80211_bitrate_mask structure.
1139  *
1140  * Return: 0 on success.
1141  */
1142 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1143                                       struct ieee80211_vif *vif,
1144                                       const struct cfg80211_bitrate_mask *mask)
1145 {
1146         struct rsi_hw *adapter = hw->priv;
1147         struct rsi_common *common = adapter->priv;
1148         enum nl80211_band band = hw->conf.chandef.chan->band;
1149
1150         mutex_lock(&common->mutex);
1151         common->fixedrate_mask[band] = 0;
1152
1153         if (mask->control[band].legacy == 0xfff) {
1154                 common->fixedrate_mask[band] =
1155                         (mask->control[band].ht_mcs[0] << 12);
1156         } else {
1157                 common->fixedrate_mask[band] =
1158                         mask->control[band].legacy;
1159         }
1160         mutex_unlock(&common->mutex);
1161
1162         return 0;
1163 }
1164
1165 /**
1166  * rsi_perform_cqm() - This function performs cqm.
1167  * @common: Pointer to the driver private structure.
1168  * @bssid: pointer to the bssid.
1169  * @rssi: RSSI value.
1170  */
1171 static void rsi_perform_cqm(struct rsi_common *common,
1172                             u8 *bssid,
1173                             s8 rssi,
1174                             struct ieee80211_vif *vif)
1175 {
1176         s8 last_event = common->cqm_info.last_cqm_event_rssi;
1177         int thold = common->cqm_info.rssi_thold;
1178         u32 hyst = common->cqm_info.rssi_hyst;
1179         enum nl80211_cqm_rssi_threshold_event event;
1180
1181         if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1182                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1183         else if (rssi > thold &&
1184                  (last_event == 0 || rssi > (last_event + hyst)))
1185                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1186         else
1187                 return;
1188
1189         common->cqm_info.last_cqm_event_rssi = rssi;
1190         rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1191         ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1192
1193         return;
1194 }
1195
1196 /**
1197  * rsi_fill_rx_status() - This function fills rx status in
1198  *                        ieee80211_rx_status structure.
1199  * @hw: Pointer to the ieee80211_hw structure.
1200  * @skb: Pointer to the socket buffer structure.
1201  * @common: Pointer to the driver private structure.
1202  * @rxs: Pointer to the ieee80211_rx_status structure.
1203  *
1204  * Return: None.
1205  */
1206 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1207                                struct sk_buff *skb,
1208                                struct rsi_common *common,
1209                                struct ieee80211_rx_status *rxs)
1210 {
1211         struct rsi_hw *adapter = common->priv;
1212         struct ieee80211_vif *vif;
1213         struct ieee80211_bss_conf *bss = NULL;
1214         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1215         struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1216         struct ieee80211_hdr *hdr;
1217         char rssi = rx_params->rssi;
1218         u8 hdrlen = 0;
1219         u8 channel = rx_params->channel;
1220         s32 freq;
1221         int i;
1222
1223         hdr = ((struct ieee80211_hdr *)(skb->data));
1224         hdrlen = ieee80211_hdrlen(hdr->frame_control);
1225
1226         memset(info, 0, sizeof(struct ieee80211_tx_info));
1227
1228         rxs->signal = -(rssi);
1229
1230         rxs->band = common->band;
1231
1232         freq = ieee80211_channel_to_frequency(channel, rxs->band);
1233
1234         if (freq)
1235                 rxs->freq = freq;
1236
1237         if (ieee80211_has_protected(hdr->frame_control)) {
1238                 if (rsi_is_cipher_wep(common)) {
1239                         memmove(skb->data + 4, skb->data, hdrlen);
1240                         skb_pull(skb, 4);
1241                 } else {
1242                         memmove(skb->data + 8, skb->data, hdrlen);
1243                         skb_pull(skb, 8);
1244                         rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1245                 }
1246                 rxs->flag |= RX_FLAG_DECRYPTED;
1247                 rxs->flag |= RX_FLAG_IV_STRIPPED;
1248         }
1249
1250         for (i = 0; i < RSI_MAX_VIFS; i++) {
1251                 vif = adapter->vifs[i];
1252                 if (!vif)
1253                         continue;
1254                 if (vif->type == NL80211_IFTYPE_STATION) {
1255                         bss = &vif->bss_conf;
1256                         break;
1257                 }
1258         }
1259         if (!bss)
1260                 return;
1261         /* CQM only for connected AP beacons, the RSSI is a weighted avg */
1262         if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1263                 if (ieee80211_is_beacon(hdr->frame_control))
1264                         rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1265         }
1266
1267         return;
1268 }
1269
1270 /**
1271  * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
1272  * @common: Pointer to the driver private structure.
1273  * @skb: Pointer to the socket buffer structure.
1274  *
1275  * Return: None.
1276  */
1277 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1278                             struct sk_buff *skb)
1279 {
1280         struct rsi_hw *adapter = common->priv;
1281         struct ieee80211_hw *hw = adapter->hw;
1282         struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1283
1284         if ((common->iface_down) || (!adapter->sc_nvifs)) {
1285                 dev_kfree_skb(skb);
1286                 return;
1287         }
1288
1289         /* filling in the ieee80211_rx_status flags */
1290         rsi_fill_rx_status(hw, skb, common, rx_status);
1291
1292         ieee80211_rx_irqsafe(hw, skb);
1293 }
1294
1295 static void rsi_set_min_rate(struct ieee80211_hw *hw,
1296                              struct ieee80211_sta *sta,
1297                              struct rsi_common *common)
1298 {
1299         u8 band = hw->conf.chandef.chan->band;
1300         u8 ii;
1301         u32 rate_bitmap;
1302         bool matched = false;
1303
1304         common->bitrate_mask[band] = sta->supp_rates[band];
1305
1306         rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
1307
1308         if (rate_bitmap & 0xfff) {
1309                 /* Find out the min rate */
1310                 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
1311                         if (rate_bitmap & BIT(ii)) {
1312                                 common->min_rate = rsi_rates[ii].hw_value;
1313                                 matched = true;
1314                                 break;
1315                         }
1316                 }
1317         }
1318
1319         common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
1320
1321         if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
1322                 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
1323                         if ((rate_bitmap >> 12) & BIT(ii)) {
1324                                 common->min_rate = rsi_mcsrates[ii];
1325                                 matched = true;
1326                                 break;
1327                         }
1328                 }
1329         }
1330
1331         if (!matched)
1332                 common->min_rate = 0xffff;
1333 }
1334
1335 /**
1336  * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1337  *                          connected.
1338  * @hw: pointer to the ieee80211_hw structure.
1339  * @vif: Pointer to the ieee80211_vif structure.
1340  * @sta: Pointer to the ieee80211_sta structure.
1341  *
1342  * Return: 0 on success, negative error codes on failure.
1343  */
1344 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1345                                 struct ieee80211_vif *vif,
1346                                 struct ieee80211_sta *sta)
1347 {
1348         struct rsi_hw *adapter = hw->priv;
1349         struct rsi_common *common = adapter->priv;
1350         bool sta_exist = false;
1351         struct rsi_sta *rsta;
1352         int status = 0;
1353
1354         rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1355
1356         mutex_lock(&common->mutex);
1357
1358         if ((vif->type == NL80211_IFTYPE_AP) ||
1359             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1360                 u8 cnt;
1361                 int sta_idx = -1;
1362                 int free_index = -1;
1363
1364                 /* Check if max stations reached */
1365                 if (common->num_stations >= common->max_stations) {
1366                         rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1367                         status = -EOPNOTSUPP;
1368                         goto unlock;
1369                 }
1370                 for (cnt = 0; cnt < common->max_stations; cnt++) {
1371                         rsta = &common->stations[cnt];
1372
1373                         if (!rsta->sta) {
1374                                 if (free_index < 0)
1375                                         free_index = cnt;
1376                                 continue;
1377                         }
1378                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1379                                 rsi_dbg(INFO_ZONE, "Station exists\n");
1380                                 sta_idx = cnt;
1381                                 sta_exist = true;
1382                                 break;
1383                         }
1384                 }
1385                 if (!sta_exist) {
1386                         if (free_index >= 0)
1387                                 sta_idx = free_index;
1388                 }
1389                 if (sta_idx < 0) {
1390                         rsi_dbg(ERR_ZONE,
1391                                 "%s: Some problem reaching here...\n",
1392                                 __func__);
1393                         status = -EINVAL;
1394                         goto unlock;
1395                 }
1396                 rsta = &common->stations[sta_idx];
1397                 rsta->sta = sta;
1398                 rsta->sta_id = sta_idx;
1399                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1400                         rsta->start_tx_aggr[cnt] = false;
1401                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1402                         rsta->seq_start[cnt] = 0;
1403                 if (!sta_exist) {
1404                         rsi_dbg(INFO_ZONE, "New Station\n");
1405
1406                         /* Send peer notify to device */
1407                         rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1408                         rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1409                                               sta->addr, sta->wme, sta->aid,
1410                                               sta, sta_idx, 0, vif);
1411
1412                         if (common->key) {
1413                                 struct ieee80211_key_conf *key = common->key;
1414
1415                                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1416                                     (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1417                                         rsi_hal_load_key(adapter->priv,
1418                                                          key->key,
1419                                                          key->keylen,
1420                                                          RSI_PAIRWISE_KEY,
1421                                                          key->keyidx,
1422                                                          key->cipher,
1423                                                          sta_idx,
1424                                                          vif);
1425                         }
1426
1427                         common->num_stations++;
1428                 }
1429         }
1430
1431         if ((vif->type == NL80211_IFTYPE_STATION) ||
1432             (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1433                 rsi_set_min_rate(hw, sta, common);
1434                 if (sta->ht_cap.ht_supported) {
1435                         common->vif_info[0].is_ht = true;
1436                         common->bitrate_mask[NL80211_BAND_2GHZ] =
1437                                         sta->supp_rates[NL80211_BAND_2GHZ];
1438                         if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1439                             (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1440                                 common->vif_info[0].sgi = true;
1441                         ieee80211_start_tx_ba_session(sta, 0, 0);
1442                 }
1443         }
1444
1445 unlock:
1446         mutex_unlock(&common->mutex);
1447
1448         return status;
1449 }
1450
1451 /**
1452  * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1453  *                             getting disconnected.
1454  * @hw: Pointer to the ieee80211_hw structure.
1455  * @vif: Pointer to the ieee80211_vif structure.
1456  * @sta: Pointer to the ieee80211_sta structure.
1457  *
1458  * Return: 0 on success, negative error codes on failure.
1459  */
1460 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1461                                    struct ieee80211_vif *vif,
1462                                    struct ieee80211_sta *sta)
1463 {
1464         struct rsi_hw *adapter = hw->priv;
1465         struct rsi_common *common = adapter->priv;
1466         struct ieee80211_bss_conf *bss = &vif->bss_conf;
1467         struct rsi_sta *rsta;
1468
1469         rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1470
1471         mutex_lock(&common->mutex);
1472
1473         if ((vif->type == NL80211_IFTYPE_AP) ||
1474             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1475                 u8 sta_idx, cnt;
1476
1477                 /* Send peer notify to device */
1478                 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1479                 for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1480                         rsta = &common->stations[sta_idx];
1481
1482                         if (!rsta->sta)
1483                                 continue;
1484                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1485                                 rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1486                                                       sta->addr, sta->wme,
1487                                                       sta->aid, sta, sta_idx,
1488                                                       0, vif);
1489                                 rsta->sta = NULL;
1490                                 rsta->sta_id = -1;
1491                                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1492                                         rsta->start_tx_aggr[cnt] = false;
1493                                 if (common->num_stations > 0)
1494                                         common->num_stations--;
1495                                 break;
1496                         }
1497                 }
1498                 if (sta_idx >= common->max_stations)
1499                         rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1500         }
1501
1502         if ((vif->type == NL80211_IFTYPE_STATION) ||
1503             (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1504                 /* Resetting all the fields to default values */
1505                 memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1506                 bss->qos = sta->wme;
1507                 common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1508                 common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1509                 common->min_rate = 0xffff;
1510                 common->vif_info[0].is_ht = false;
1511                 common->vif_info[0].sgi = false;
1512                 common->vif_info[0].seq_start = 0;
1513                 common->secinfo.ptk_cipher = 0;
1514                 common->secinfo.gtk_cipher = 0;
1515                 if (!common->iface_down)
1516                         rsi_send_rx_filter_frame(common, 0);
1517         }
1518         mutex_unlock(&common->mutex);
1519
1520         return 0;
1521 }
1522
1523 /**
1524  * rsi_mac80211_set_antenna() - This function is used to configure
1525  *                              tx and rx antennas.
1526  * @hw: Pointer to the ieee80211_hw structure.
1527  * @tx_ant: Bitmap for tx antenna
1528  * @rx_ant: Bitmap for rx antenna
1529  *
1530  * Return: 0 on success, Negative error code on failure.
1531  */
1532 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1533                                     u32 tx_ant, u32 rx_ant)
1534 {
1535         struct rsi_hw *adapter = hw->priv;
1536         struct rsi_common *common = adapter->priv;
1537         u8 antenna = 0;
1538
1539         if (tx_ant > 1 || rx_ant > 1) {
1540                 rsi_dbg(ERR_ZONE,
1541                         "Invalid antenna selection (tx: %d, rx:%d)\n",
1542                         tx_ant, rx_ant);
1543                 rsi_dbg(ERR_ZONE,
1544                         "Use 0 for int_ant, 1 for ext_ant\n");
1545                 return -EINVAL;
1546         }
1547
1548         rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1549                         __func__, tx_ant, rx_ant);
1550
1551         mutex_lock(&common->mutex);
1552
1553         antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1554         if (common->ant_in_use != antenna)
1555                 if (rsi_set_antenna(common, antenna))
1556                         goto fail_set_antenna;
1557
1558         rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1559                 tx_ant ? "UFL" : "INT");
1560
1561         common->ant_in_use = antenna;
1562
1563         mutex_unlock(&common->mutex);
1564
1565         return 0;
1566
1567 fail_set_antenna:
1568         rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1569         mutex_unlock(&common->mutex);
1570         return -EINVAL;
1571 }
1572
1573 /**
1574  * rsi_mac80211_get_antenna() - This function is used to configure
1575  *                              tx and rx antennas.
1576  *
1577  * @hw: Pointer to the ieee80211_hw structure.
1578  * @tx_ant: Bitmap for tx antenna
1579  * @rx_ant: Bitmap for rx antenna
1580  *
1581  * Return: 0 on success, negative error codes on failure.
1582  */
1583 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1584                                     u32 *tx_ant, u32 *rx_ant)
1585 {
1586         struct rsi_hw *adapter = hw->priv;
1587         struct rsi_common *common = adapter->priv;
1588
1589         mutex_lock(&common->mutex);
1590
1591         *tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1592         *rx_ant = 0;
1593
1594         mutex_unlock(&common->mutex);
1595
1596         return 0;
1597 }
1598
1599 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1600 {
1601         switch (region_code) {
1602         case NL80211_DFS_FCC:
1603                 return RSI_REGION_FCC;
1604         case NL80211_DFS_ETSI:
1605                 return RSI_REGION_ETSI;
1606         case NL80211_DFS_JP:
1607                 return RSI_REGION_TELEC;
1608         case NL80211_DFS_UNSET:
1609                 return RSI_REGION_WORLD;
1610         }
1611         return RSI_REGION_WORLD;
1612 }
1613
1614 static void rsi_reg_notify(struct wiphy *wiphy,
1615                            struct regulatory_request *request)
1616 {
1617         struct ieee80211_supported_band *sband;
1618         struct ieee80211_channel *ch;
1619         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1620         struct rsi_hw * adapter = hw->priv;
1621         struct rsi_common *common = adapter->priv;
1622         int i;
1623
1624         mutex_lock(&common->mutex);
1625
1626         rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1627                 request->alpha2, request->dfs_region);
1628
1629         if (common->num_supp_bands > 1) {
1630                 sband = wiphy->bands[NL80211_BAND_5GHZ];
1631
1632                 for (i = 0; i < sband->n_channels; i++) {
1633                         ch = &sband->channels[i];
1634                         if (ch->flags & IEEE80211_CHAN_DISABLED)
1635                                 continue;
1636
1637                         if (ch->flags & IEEE80211_CHAN_RADAR)
1638                                 ch->flags |= IEEE80211_CHAN_NO_IR;
1639                 }
1640         }
1641         adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1642         rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1643
1644         adapter->country[0] = request->alpha2[0];
1645         adapter->country[1] = request->alpha2[1];
1646
1647         mutex_unlock(&common->mutex);
1648 }
1649
1650 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1651 {
1652         struct rsi_hw *adapter = hw->priv;
1653         struct rsi_common *common = adapter->priv;
1654
1655         mutex_lock(&common->mutex);
1656         if (common->fsm_state != FSM_MAC_INIT_DONE)
1657                 wiphy_rfkill_set_hw_state(hw->wiphy, true);
1658         else
1659                 wiphy_rfkill_set_hw_state(hw->wiphy, false);
1660         mutex_unlock(&common->mutex);
1661 }
1662
1663 static void rsi_resume_conn_channel(struct rsi_common *common)
1664 {
1665         struct rsi_hw *adapter = common->priv;
1666         struct ieee80211_vif *vif;
1667         int cnt;
1668
1669         for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1670                 vif = adapter->vifs[cnt];
1671                 if (!vif)
1672                         continue;
1673
1674                 if ((vif->type == NL80211_IFTYPE_AP) ||
1675                     (vif->type == NL80211_IFTYPE_P2P_GO)) {
1676                         rsi_switch_channel(adapter, vif);
1677                         break;
1678                 }
1679                 if (((vif->type == NL80211_IFTYPE_STATION) ||
1680                      (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1681                     vif->bss_conf.assoc) {
1682                         rsi_switch_channel(adapter, vif);
1683                         break;
1684                 }
1685         }
1686 }
1687
1688 void rsi_roc_timeout(struct timer_list *t)
1689 {
1690         struct rsi_common *common = from_timer(common, t, roc_timer);
1691
1692         rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1693
1694         mutex_lock(&common->mutex);
1695         ieee80211_remain_on_channel_expired(common->priv->hw);
1696
1697         if (timer_pending(&common->roc_timer))
1698                 del_timer(&common->roc_timer);
1699
1700         rsi_resume_conn_channel(common);
1701         mutex_unlock(&common->mutex);
1702 }
1703
1704 static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1705                             struct ieee80211_channel *chan, int duration,
1706                             enum ieee80211_roc_type type)
1707 {
1708         struct rsi_hw *adapter = (struct rsi_hw *)hw->priv;
1709         struct rsi_common *common = (struct rsi_common *)adapter->priv;
1710         int status = 0;
1711
1712         rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1713
1714         mutex_lock(&common->mutex);
1715         rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1716                 __func__, chan->hw_value, duration);
1717
1718         if (timer_pending(&common->roc_timer)) {
1719                 rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1720                 del_timer(&common->roc_timer);
1721         }
1722         common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1723         add_timer(&common->roc_timer);
1724
1725         /* Configure band */
1726         if (rsi_band_check(common, chan)) {
1727                 rsi_dbg(ERR_ZONE, "Failed to set band\n");
1728                 status = -EINVAL;
1729                 goto out;
1730         }
1731
1732         /* Configure channel */
1733         if (rsi_set_channel(common, chan)) {
1734                 rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1735                 status = -EINVAL;
1736                 goto out;
1737         }
1738
1739         common->roc_vif = vif;
1740         ieee80211_ready_on_channel(hw);
1741         rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1742                 __func__, chan->hw_value);
1743
1744 out:
1745         mutex_unlock(&common->mutex);
1746
1747         return status;
1748 }
1749
1750 static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw)
1751 {
1752         struct rsi_hw *adapter = hw->priv;
1753         struct rsi_common *common = adapter->priv;
1754
1755         rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1756
1757         mutex_lock(&common->mutex);
1758         if (!timer_pending(&common->roc_timer)) {
1759                 mutex_unlock(&common->mutex);
1760                 return 0;
1761         }
1762
1763         del_timer(&common->roc_timer);
1764
1765         rsi_resume_conn_channel(common);
1766         mutex_unlock(&common->mutex);
1767
1768         return 0;
1769 }
1770
1771 #ifdef CONFIG_PM
1772 static const struct wiphy_wowlan_support rsi_wowlan_support = {
1773         .flags = WIPHY_WOWLAN_ANY |
1774                  WIPHY_WOWLAN_MAGIC_PKT |
1775                  WIPHY_WOWLAN_DISCONNECT |
1776                  WIPHY_WOWLAN_GTK_REKEY_FAILURE  |
1777                  WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1778                  WIPHY_WOWLAN_EAP_IDENTITY_REQ   |
1779                  WIPHY_WOWLAN_4WAY_HANDSHAKE,
1780 };
1781
1782 static u16 rsi_wow_map_triggers(struct rsi_common *common,
1783                                 struct cfg80211_wowlan *wowlan)
1784 {
1785         u16 wow_triggers = 0;
1786
1787         rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1788
1789         if (wowlan->any)
1790                 wow_triggers |= RSI_WOW_ANY;
1791         if (wowlan->magic_pkt)
1792                 wow_triggers |= RSI_WOW_MAGIC_PKT;
1793         if (wowlan->disconnect)
1794                 wow_triggers |= RSI_WOW_DISCONNECT;
1795         if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1796             wowlan->four_way_handshake)
1797                 wow_triggers |= RSI_WOW_GTK_REKEY;
1798
1799         return wow_triggers;
1800 }
1801
1802 int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1803 {
1804         struct rsi_common *common = adapter->priv;
1805         u16 triggers = 0;
1806         u16 rx_filter_word = 0;
1807         struct ieee80211_bss_conf *bss = NULL;
1808
1809         rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1810
1811         if (!adapter->vifs[0])
1812                 return -EINVAL;
1813
1814         bss = &adapter->vifs[0]->bss_conf;
1815
1816         if (WARN_ON(!wowlan)) {
1817                 rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1818                 return -EINVAL;
1819         }
1820
1821         common->wow_flags |= RSI_WOW_ENABLED;
1822         triggers = rsi_wow_map_triggers(common, wowlan);
1823         if (!triggers) {
1824                 rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1825                 return -EINVAL;
1826         }
1827         if (!bss->assoc) {
1828                 rsi_dbg(ERR_ZONE,
1829                         "Cannot configure WoWLAN (Station not connected)\n");
1830                 common->wow_flags |= RSI_WOW_NO_CONNECTION;
1831                 return 0;
1832         }
1833         rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1834         rsi_send_wowlan_request(common, triggers, 1);
1835
1836         /**
1837          * Increase the beacon_miss threshold & keep-alive timers in
1838          * vap_update frame
1839          */
1840         rsi_send_vap_dynamic_update(common);
1841
1842         rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1843         rsi_send_rx_filter_frame(common, rx_filter_word);
1844
1845         return 0;
1846 }
1847 EXPORT_SYMBOL(rsi_config_wowlan);
1848
1849 static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1850                                 struct cfg80211_wowlan *wowlan)
1851 {
1852         struct rsi_hw *adapter = hw->priv;
1853         struct rsi_common *common = adapter->priv;
1854
1855         rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1856         mutex_lock(&common->mutex);
1857         if (rsi_config_wowlan(adapter, wowlan)) {
1858                 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1859                 mutex_unlock(&common->mutex);
1860                 return 1;
1861         }
1862         mutex_unlock(&common->mutex);
1863
1864         return 0;
1865 }
1866
1867 static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1868 {
1869         u16 rx_filter_word = 0;
1870         struct rsi_hw *adapter = hw->priv;
1871         struct rsi_common *common = adapter->priv;
1872
1873         common->wow_flags = 0;
1874
1875         rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1876
1877         if (common->hibernate_resume)
1878                 return 0;
1879
1880         mutex_lock(&common->mutex);
1881         rsi_send_wowlan_request(common, 0, 0);
1882
1883         rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1884                           ALLOW_MGMT_ASSOC_PEER);
1885         rsi_send_rx_filter_frame(common, rx_filter_word);
1886         mutex_unlock(&common->mutex);
1887
1888         return 0;
1889 }
1890
1891 #endif
1892
1893 static const struct ieee80211_ops mac80211_ops = {
1894         .tx = rsi_mac80211_tx,
1895         .start = rsi_mac80211_start,
1896         .stop = rsi_mac80211_stop,
1897         .add_interface = rsi_mac80211_add_interface,
1898         .remove_interface = rsi_mac80211_remove_interface,
1899         .config = rsi_mac80211_config,
1900         .bss_info_changed = rsi_mac80211_bss_info_changed,
1901         .conf_tx = rsi_mac80211_conf_tx,
1902         .configure_filter = rsi_mac80211_conf_filter,
1903         .set_key = rsi_mac80211_set_key,
1904         .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1905         .set_bitrate_mask = rsi_mac80211_set_rate_mask,
1906         .ampdu_action = rsi_mac80211_ampdu_action,
1907         .sta_add = rsi_mac80211_sta_add,
1908         .sta_remove = rsi_mac80211_sta_remove,
1909         .set_antenna = rsi_mac80211_set_antenna,
1910         .get_antenna = rsi_mac80211_get_antenna,
1911         .rfkill_poll = rsi_mac80211_rfkill_poll,
1912         .remain_on_channel = rsi_mac80211_roc,
1913         .cancel_remain_on_channel = rsi_mac80211_cancel_roc,
1914 #ifdef CONFIG_PM
1915         .suspend = rsi_mac80211_suspend,
1916         .resume  = rsi_mac80211_resume,
1917 #endif
1918 };
1919
1920 /**
1921  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1922  * @common: Pointer to the driver private structure.
1923  *
1924  * Return: 0 on success, negative error codes on failure.
1925  */
1926 int rsi_mac80211_attach(struct rsi_common *common)
1927 {
1928         int status = 0;
1929         struct ieee80211_hw *hw = NULL;
1930         struct wiphy *wiphy = NULL;
1931         struct rsi_hw *adapter = common->priv;
1932         u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
1933
1934         rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
1935
1936         hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
1937         if (!hw) {
1938                 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
1939                 return -ENOMEM;
1940         }
1941
1942         wiphy = hw->wiphy;
1943
1944         SET_IEEE80211_DEV(hw, adapter->device);
1945
1946         hw->priv = adapter;
1947         adapter->hw = hw;
1948
1949         ieee80211_hw_set(hw, SIGNAL_DBM);
1950         ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1951         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1952         ieee80211_hw_set(hw, SUPPORTS_PS);
1953         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
1954
1955         hw->queues = MAX_HW_QUEUES;
1956         hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
1957
1958         hw->max_rates = 1;
1959         hw->max_rate_tries = MAX_RETRIES;
1960         hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
1961         hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
1962
1963         hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
1964         hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
1965         hw->rate_control_algorithm = "AARF";
1966
1967         SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
1968         ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
1969
1970         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1971                                  BIT(NL80211_IFTYPE_AP) |
1972                                  BIT(NL80211_IFTYPE_P2P_DEVICE) |
1973                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
1974                                  BIT(NL80211_IFTYPE_P2P_GO);
1975
1976         wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1977         wiphy->retry_short = RETRY_SHORT;
1978         wiphy->retry_long  = RETRY_LONG;
1979         wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1980         wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1981         wiphy->flags = 0;
1982
1983         wiphy->available_antennas_rx = 1;
1984         wiphy->available_antennas_tx = 1;
1985
1986         status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
1987         if (status)
1988                 return status;
1989         wiphy->bands[NL80211_BAND_2GHZ] =
1990                 &adapter->sbands[NL80211_BAND_2GHZ];
1991         if (common->num_supp_bands > 1) {
1992                 status = rsi_register_rates_channels(adapter,
1993                                                      NL80211_BAND_5GHZ);
1994                 if (status)
1995                         return status;
1996                 wiphy->bands[NL80211_BAND_5GHZ] =
1997                         &adapter->sbands[NL80211_BAND_5GHZ];
1998         }
1999
2000         /* AP Parameters */
2001         wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2002         common->max_stations = wiphy->max_ap_assoc_sta;
2003         rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2004         hw->sta_data_size = sizeof(struct rsi_sta);
2005         wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2006         wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2007         wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2008         wiphy->reg_notifier = rsi_reg_notify;
2009
2010 #ifdef CONFIG_PM
2011         wiphy->wowlan = &rsi_wowlan_support;
2012 #endif
2013
2014         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2015
2016         /* Wi-Fi direct parameters */
2017         wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2018         wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2019         wiphy->max_remain_on_channel_duration = 10000;
2020         hw->max_listen_interval = 10;
2021         wiphy->iface_combinations = rsi_iface_combinations;
2022         wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2023
2024         if (common->coex_mode > 1)
2025                 wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2026
2027         status = ieee80211_register_hw(hw);
2028         if (status)
2029                 return status;
2030
2031         return rsi_init_dbgfs(adapter);
2032 }