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 static int rsi_mac80211_hw_scan_start(struct ieee80211_hw *hw,
 234                                       struct ieee80211_vif *vif,
 235                                       struct ieee80211_scan_request *hw_req)
 236 {
 237         struct cfg80211_scan_request *scan_req = &hw_req->req;
 238         struct rsi_hw *adapter = hw->priv;
 239         struct rsi_common *common = adapter->priv;
 240
 241         rsi_dbg(INFO_ZONE, "***** Hardware scan start *****\n");
 242         common->mac_ops_resumed = false;
 243
 244         if (common->fsm_state != FSM_MAC_INIT_DONE)
 245                 return -ENODEV;
 246
 247         if ((common->wow_flags & RSI_WOW_ENABLED) ||
 248             scan_req->n_channels == 0)
 249                 return -EINVAL;
 250
 251         /* Scan already in progress. So return */
 252         if (common->bgscan_en)
 253                 return -EBUSY;
 254
 255         /* If STA is not connected, return with special value 1, in order
 256          * to start sw_scan in mac80211
 257          */
 258         if (!vif->cfg.assoc)
 259                 return 1;
 260
 261         mutex_lock(&common->mutex);
 262         common->hwscan = scan_req;
 263         if (!rsi_send_bgscan_params(common, RSI_START_BGSCAN)) {
 264                 if (!rsi_send_bgscan_probe_req(common, vif)) {
 265                         rsi_dbg(INFO_ZONE, "Background scan started...\n");
 266                         common->bgscan_en = true;
 267                 }
 268         }
 269         mutex_unlock(&common->mutex);
 270
 271         return 0;
 272 }
 273
 274 static void rsi_mac80211_cancel_hw_scan(struct ieee80211_hw *hw,
 275                                         struct ieee80211_vif *vif)
 276 {
 277         struct rsi_hw *adapter = hw->priv;
 278         struct rsi_common *common = adapter->priv;
 279         struct cfg80211_scan_info info;
 280
 281         rsi_dbg(INFO_ZONE, "***** Hardware scan stop *****\n");
 282         mutex_lock(&common->mutex);
 283
 284         if (common->bgscan_en) {
 285                 if (!rsi_send_bgscan_params(common, RSI_STOP_BGSCAN))
 286                         common->bgscan_en = false;
 287                 info.aborted = false;
 288                 ieee80211_scan_completed(adapter->hw, &info);
 289                 rsi_dbg(INFO_ZONE, "Back ground scan cancelled\n");
 290         }
 291         common->hwscan = NULL;
 292         mutex_unlock(&common->mutex);
 293 }
 294
 295 /**
 296  * rsi_mac80211_detach() - This function is used to de-initialize the
 297  *                         Mac80211 stack.
 298  * @adapter: Pointer to the adapter structure.
 299  *
 300  * Return: None.
 301  */
 302 void rsi_mac80211_detach(struct rsi_hw *adapter)
 303 {
 304         struct ieee80211_hw *hw = adapter->hw;
 305         enum nl80211_band band;
 306
 307         if (hw) {
 308                 ieee80211_stop_queues(hw);
 309                 ieee80211_unregister_hw(hw);
 310                 ieee80211_free_hw(hw);
 311                 adapter->hw = NULL;
 312         }
 313
 314         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 315                 struct ieee80211_supported_band *sband =
 316                                         &adapter->sbands[band];
 317
 318                 kfree(sband->channels);
 319         }
 320
 321 #ifdef CONFIG_RSI_DEBUGFS
 322         rsi_remove_dbgfs(adapter);
 323         kfree(adapter->dfsentry);
 324 #endif
 325 }
 326 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
 327
 328 /**
 329  * rsi_indicate_tx_status() - This function indicates the transmit status.
 330  * @adapter: Pointer to the adapter structure.
 331  * @skb: Pointer to the socket buffer structure.
 332  * @status: Status
 333  *
 334  * Return: None.
 335  */
 336 void rsi_indicate_tx_status(struct rsi_hw *adapter,
 337                             struct sk_buff *skb,
 338                             int status)
 339 {
 340         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 341         struct skb_info *tx_params;
 342
 343         if (!adapter->hw) {
 344                 rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
 345                 return;
 346         }
 347
 348         if (!status)
 349                 info->flags |= IEEE80211_TX_STAT_ACK;
 350
 351         tx_params = (struct skb_info *)info->driver_data;
 352         skb_pull(skb, tx_params->internal_hdr_size);
 353         memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
 354
 355         ieee80211_tx_status_irqsafe(adapter->hw, skb);
 356 }
 357
 358 /**
 359  * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
 360  *                     transmitted frame.SKB contains the buffer starting
 361  *                     from the IEEE 802.11 header.
 362  * @hw: Pointer to the ieee80211_hw structure.
 363  * @control: Pointer to the ieee80211_tx_control structure
 364  * @skb: Pointer to the socket buffer structure.
 365  *
 366  * Return: None
 367  */
 368 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
 369                             struct ieee80211_tx_control *control,
 370                             struct sk_buff *skb)
 371 {
 372         struct rsi_hw *adapter = hw->priv;
 373         struct rsi_common *common = adapter->priv;
 374         struct ieee80211_hdr *wlh = (struct ieee80211_hdr *)skb->data;
 375
 376         if (ieee80211_is_auth(wlh->frame_control))
 377                 common->mac_ops_resumed = false;
 378
 379         rsi_core_xmit(common, skb);
 380 }
 381
 382 /**
 383  * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
 384  *                        the driver init is complete by then, just
 385  *                        returns success.
 386  * @hw: Pointer to the ieee80211_hw structure.
 387  *
 388  * Return: 0 as success.
 389  */
 390 static int rsi_mac80211_start(struct ieee80211_hw *hw)
 391 {
 392         struct rsi_hw *adapter = hw->priv;
 393         struct rsi_common *common = adapter->priv;
 394
 395         rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
 396         mutex_lock(&common->mutex);
 397         if (common->hibernate_resume) {
 398                 common->reinit_hw = true;
 399                 adapter->host_intf_ops->reinit_device(adapter);
 400                 wait_for_completion(&adapter->priv->wlan_init_completion);
 401         }
 402         common->iface_down = false;
 403         wiphy_rfkill_start_polling(hw->wiphy);
 404         rsi_send_rx_filter_frame(common, 0);
 405         mutex_unlock(&common->mutex);
 406
 407         return 0;
 408 }
 409
 410 /**
 411  * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
 412  * @hw: Pointer to the ieee80211_hw structure.
 413  *
 414  * Return: None.
 415  */
 416 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
 417 {
 418         struct rsi_hw *adapter = hw->priv;
 419         struct rsi_common *common = adapter->priv;
 420
 421         rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
 422         mutex_lock(&common->mutex);
 423         common->iface_down = true;
 424         wiphy_rfkill_stop_polling(hw->wiphy);
 425
 426         /* Block all rx frames */
 427         rsi_send_rx_filter_frame(common, 0xffff);
 428
 429         mutex_unlock(&common->mutex);
 430 }
 431
 432 static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
 433 {
 434         switch (vif_type) {
 435         case NL80211_IFTYPE_STATION:
 436                 return RSI_OPMODE_STA;
 437         case NL80211_IFTYPE_AP:
 438                 return RSI_OPMODE_AP;
 439         case NL80211_IFTYPE_P2P_DEVICE:
 440                 return RSI_OPMODE_P2P_CLIENT;
 441         case NL80211_IFTYPE_P2P_CLIENT:
 442                 return RSI_OPMODE_P2P_CLIENT;
 443         case NL80211_IFTYPE_P2P_GO:
 444                 return RSI_OPMODE_P2P_GO;
 445         default:
 446                 return RSI_OPMODE_UNSUPPORTED;
 447         }
 448 }
 449
 450 /**
 451  * rsi_mac80211_add_interface() - This function is called when a netdevice
 452  *                                attached to the hardware is enabled.
 453  * @hw: Pointer to the ieee80211_hw structure.
 454  * @vif: Pointer to the ieee80211_vif structure.
 455  *
 456  * Return: ret: 0 on success, negative error code on failure.
 457  */
 458 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
 459                                       struct ieee80211_vif *vif)
 460 {
 461         struct rsi_hw *adapter = hw->priv;
 462         struct rsi_common *common = adapter->priv;
 463         struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 464         enum opmode intf_mode;
 465         enum vap_status vap_status;
 466         int vap_idx = -1, i;
 467
 468         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
 469         mutex_lock(&common->mutex);
 470
 471         intf_mode = rsi_map_intf_mode(vif->type);
 472         if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
 473                 rsi_dbg(ERR_ZONE,
 474                         "%s: Interface type %d not supported\n", __func__,
 475                         vif->type);
 476                 mutex_unlock(&common->mutex);
 477                 return -EOPNOTSUPP;
 478         }
 479         if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
 480             (vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
 481             (vif->type == NL80211_IFTYPE_P2P_GO))
 482                 common->p2p_enabled = true;
 483
 484         /* Get free vap index */
 485         for (i = 0; i < RSI_MAX_VIFS; i++) {
 486                 if (!adapter->vifs[i] ||
 487                     !memcmp(vif->addr, adapter->vifs[i]->addr, ETH_ALEN)) {
 488                         vap_idx = i;
 489                         break;
 490                 }
 491         }
 492         if (vap_idx < 0) {
 493                 rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
 494                 mutex_unlock(&common->mutex);
 495                 return -EOPNOTSUPP;
 496         }
 497         vif_info->vap_id = vap_idx;
 498         adapter->vifs[vap_idx] = vif;
 499         adapter->sc_nvifs++;
 500         vap_status = VAP_ADD;
 501
 502         if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
 503                                      vif_info->vap_id, vap_status)) {
 504                 rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
 505                 mutex_unlock(&common->mutex);
 506                 return -EINVAL;
 507         }
 508
 509         if ((vif->type == NL80211_IFTYPE_AP) ||
 510             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 511                 rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
 512                 for (i = 0; i < common->max_stations; i++)
 513                         common->stations[i].sta = NULL;
 514         }
 515
 516         mutex_unlock(&common->mutex);
 517
 518         return 0;
 519 }
 520
 521 /**
 522  * rsi_mac80211_remove_interface() - This function notifies driver that an
 523  *                                   interface is going down.
 524  * @hw: Pointer to the ieee80211_hw structure.
 525  * @vif: Pointer to the ieee80211_vif structure.
 526  *
 527  * Return: None.
 528  */
 529 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
 530                                           struct ieee80211_vif *vif)
 531 {
 532         struct rsi_hw *adapter = hw->priv;
 533         struct rsi_common *common = adapter->priv;
 534         enum opmode opmode;
 535         int i;
 536
 537         rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
 538
 539         mutex_lock(&common->mutex);
 540
 541         if (adapter->sc_nvifs <= 0) {
 542                 mutex_unlock(&common->mutex);
 543                 return;
 544         }
 545
 546         opmode = rsi_map_intf_mode(vif->type);
 547         if (opmode == RSI_OPMODE_UNSUPPORTED) {
 548                 rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
 549                 mutex_unlock(&common->mutex);
 550                 return;
 551         }
 552         for (i = 0; i < RSI_MAX_VIFS; i++) {
 553                 if (!adapter->vifs[i])
 554                         continue;
 555                 if (vif == adapter->vifs[i]) {
 556                         rsi_set_vap_capabilities(common, opmode, vif->addr,
 557                                                  i, VAP_DELETE);
 558                         adapter->sc_nvifs--;
 559                         adapter->vifs[i] = NULL;
 560                 }
 561         }
 562         mutex_unlock(&common->mutex);
 563 }
 564
 565 /**
 566  * rsi_channel_change() - This function is a performs the checks
 567  *                        required for changing a channel and sets
 568  *                        the channel accordingly.
 569  * @hw: Pointer to the ieee80211_hw structure.
 570  *
 571  * Return: 0 on success, negative error code on failure.
 572  */
 573 static int rsi_channel_change(struct ieee80211_hw *hw)
 574 {
 575         struct rsi_hw *adapter = hw->priv;
 576         struct rsi_common *common = adapter->priv;
 577         int status = -EOPNOTSUPP;
 578         struct ieee80211_channel *curchan = hw->conf.chandef.chan;
 579         u16 channel = curchan->hw_value;
 580         struct ieee80211_vif *vif;
 581         bool assoc = false;
 582         int i;
 583
 584         rsi_dbg(INFO_ZONE,
 585                 "%s: Set channel: %d MHz type: %d channel_no %d\n",
 586                 __func__, curchan->center_freq,
 587                 curchan->flags, channel);
 588
 589         for (i = 0; i < RSI_MAX_VIFS; i++) {
 590                 vif = adapter->vifs[i];
 591                 if (!vif)
 592                         continue;
 593                 if (vif->type == NL80211_IFTYPE_STATION) {
 594                         if (vif->cfg.assoc) {
 595                                 assoc = true;
 596                                 break;
 597                         }
 598                 }
 599         }
 600         if (assoc) {
 601                 if (!common->hw_data_qs_blocked &&
 602                     (rsi_get_connected_channel(vif) != channel)) {
 603                         rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
 604                         if (!rsi_send_block_unblock_frame(common, true))
 605                                 common->hw_data_qs_blocked = true;
 606                 }
 607         }
 608
 609         status = rsi_band_check(common, curchan);
 610         if (!status)
 611                 status = rsi_set_channel(adapter->priv, curchan);
 612
 613         if (assoc) {
 614                 if (common->hw_data_qs_blocked &&
 615                     (rsi_get_connected_channel(vif) == channel)) {
 616                         rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 617                         if (!rsi_send_block_unblock_frame(common, false))
 618                                 common->hw_data_qs_blocked = false;
 619                 }
 620         }
 621
 622         return status;
 623 }
 624
 625 /**
 626  * rsi_config_power() - This function configures tx power to device
 627  * @hw: Pointer to the ieee80211_hw structure.
 628  *
 629  * Return: 0 on success, negative error code on failure.
 630  */
 631 static int rsi_config_power(struct ieee80211_hw *hw)
 632 {
 633         struct rsi_hw *adapter = hw->priv;
 634         struct rsi_common *common = adapter->priv;
 635         struct ieee80211_conf *conf = &hw->conf;
 636
 637         if (adapter->sc_nvifs <= 0) {
 638                 rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
 639                 return -EINVAL;
 640         }
 641
 642         rsi_dbg(INFO_ZONE,
 643                 "%s: Set tx power: %d dBM\n", __func__, conf->power_level);
 644
 645         if (conf->power_level == common->tx_power)
 646                 return 0;
 647
 648         common->tx_power = conf->power_level;
 649
 650         return rsi_send_radio_params_update(common);
 651 }
 652
 653 /**
 654  * rsi_mac80211_config() - This function is a handler for configuration
 655  *                         requests. The stack calls this function to
 656  *                         change hardware configuration, e.g., channel.
 657  * @hw: Pointer to the ieee80211_hw structure.
 658  * @changed: Changed flags set.
 659  *
 660  * Return: 0 on success, negative error code on failure.
 661  */
 662 static int rsi_mac80211_config(struct ieee80211_hw *hw,
 663                                u32 changed)
 664 {
 665         struct rsi_hw *adapter = hw->priv;
 666         struct rsi_common *common = adapter->priv;
 667         struct ieee80211_conf *conf = &hw->conf;
 668         int status = -EOPNOTSUPP;
 669
 670         mutex_lock(&common->mutex);
 671
 672         if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
 673                 status = rsi_channel_change(hw);
 674
 675         /* tx power */
 676         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 677                 rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
 678                 status = rsi_config_power(hw);
 679         }
 680
 681         /* Power save parameters */
 682         if ((changed & IEEE80211_CONF_CHANGE_PS) &&
 683             !common->mac_ops_resumed) {
 684                 struct ieee80211_vif *vif, *sta_vif = NULL;
 685                 unsigned long flags;
 686                 int i, set_ps = 1;
 687
 688                 for (i = 0; i < RSI_MAX_VIFS; i++) {
 689                         vif = adapter->vifs[i];
 690                         if (!vif)
 691                                 continue;
 692                         /* Don't go to power save if AP vap exists */
 693                         if ((vif->type == NL80211_IFTYPE_AP) ||
 694                             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 695                                 set_ps = 0;
 696                                 break;
 697                         }
 698                         if ((vif->type == NL80211_IFTYPE_STATION ||
 699                              vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
 700                             (!sta_vif || vif->cfg.assoc))
 701                                 sta_vif = vif;
 702                 }
 703                 if (set_ps && sta_vif) {
 704                         spin_lock_irqsave(&adapter->ps_lock, flags);
 705                         if (conf->flags & IEEE80211_CONF_PS)
 706                                 rsi_enable_ps(adapter, sta_vif);
 707                         else
 708                                 rsi_disable_ps(adapter, sta_vif);
 709                         spin_unlock_irqrestore(&adapter->ps_lock, flags);
 710                 }
 711         }
 712
 713         /* RTS threshold */
 714         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 715                 rsi_dbg(INFO_ZONE, "RTS threshold\n");
 716                 if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
 717                         rsi_dbg(INFO_ZONE,
 718                                 "%s: Sending vap updates....\n", __func__);
 719                         status = rsi_send_vap_dynamic_update(common);
 720                 }
 721         }
 722         mutex_unlock(&common->mutex);
 723
 724         return status;
 725 }
 726
 727 /**
 728  * rsi_get_connected_channel() - This function is used to get the current
 729  *                               connected channel number.
 730  * @vif: Pointer to the ieee80211_vif structure.
 731  *
 732  * Return: Current connected AP's channel number is returned.
 733  */
 734 u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
 735 {
 736         struct ieee80211_bss_conf *bss;
 737         struct ieee80211_channel *channel;
 738
 739         if (!vif)
 740                 return 0;
 741
 742         bss = &vif->bss_conf;
 743         channel = bss->chandef.chan;
 744
 745         if (!channel)
 746                 return 0;
 747
 748         return channel->hw_value;
 749 }
 750
 751 static void rsi_switch_channel(struct rsi_hw *adapter,
 752                                struct ieee80211_vif *vif)
 753 {
 754         struct rsi_common *common = adapter->priv;
 755         struct ieee80211_channel *channel;
 756
 757         if (common->iface_down)
 758                 return;
 759         if (!vif)
 760                 return;
 761
 762         channel = vif->bss_conf.chandef.chan;
 763
 764         if (!channel)
 765                 return;
 766
 767         rsi_band_check(common, channel);
 768         rsi_set_channel(common, channel);
 769         rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
 770 }
 771
 772 /**
 773  * rsi_mac80211_bss_info_changed() - This function is a handler for config
 774  *                                   requests related to BSS parameters that
 775  *                                   may vary during BSS's lifespan.
 776  * @hw: Pointer to the ieee80211_hw structure.
 777  * @vif: Pointer to the ieee80211_vif structure.
 778  * @bss_conf: Pointer to the ieee80211_bss_conf structure.
 779  * @changed: Changed flags set.
 780  *
 781  * Return: None.
 782  */
 783 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 784                                           struct ieee80211_vif *vif,
 785                                           struct ieee80211_bss_conf *bss_conf,
 786                                           u64 changed)
 787 {
 788         struct rsi_hw *adapter = hw->priv;
 789         struct rsi_common *common = adapter->priv;
 790         struct ieee80211_bss_conf *bss = &vif->bss_conf;
 791         struct ieee80211_conf *conf = &hw->conf;
 792         u16 rx_filter_word = 0;
 793
 794         mutex_lock(&common->mutex);
 795         if (changed & BSS_CHANGED_ASSOC) {
 796                 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
 797                         __func__, vif->cfg.assoc);
 798                 if (vif->cfg.assoc) {
 799                         /* Send the RX filter frame */
 800                         rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
 801                                           ALLOW_CTRL_ASSOC_PEER |
 802                                           ALLOW_MGMT_ASSOC_PEER);
 803                         rsi_send_rx_filter_frame(common, rx_filter_word);
 804                 }
 805                 rsi_inform_bss_status(common,
 806                                       RSI_OPMODE_STA,
 807                                       vif->cfg.assoc,
 808                                       bss_conf->bssid,
 809                                       bss_conf->qos,
 810                                       vif->cfg.aid,
 811                                       NULL, 0,
 812                                       bss_conf->assoc_capability, vif);
 813                 adapter->ps_info.dtim_interval_duration = bss->dtim_period;
 814                 adapter->ps_info.listen_interval = conf->listen_interval;
 815
 816                 /* If U-APSD is updated, send ps parameters to firmware */
 817                 if (vif->cfg.assoc) {
 818                         if (common->uapsd_bitmap) {
 819                                 rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
 820                                 rsi_conf_uapsd(adapter, vif);
 821                         }
 822                 } else {
 823                         common->uapsd_bitmap = 0;
 824                 }
 825         }
 826
 827         if (changed & BSS_CHANGED_CQM) {
 828                 common->cqm_info.last_cqm_event_rssi = 0;
 829                 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
 830                 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
 831                 rsi_dbg(INFO_ZONE, "RSSI threshold & hysteresis are: %d %d\n",
 832                         common->cqm_info.rssi_thold,
 833                         common->cqm_info.rssi_hyst);
 834         }
 835
 836         if (changed & BSS_CHANGED_BEACON_INT) {
 837                 rsi_dbg(INFO_ZONE, "%s: Changed Beacon interval: %d\n",
 838                         __func__, bss_conf->beacon_int);
 839                 if (common->beacon_interval != bss->beacon_int) {
 840                         common->beacon_interval = bss->beacon_int;
 841                         if (vif->type == NL80211_IFTYPE_AP) {
 842                                 struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 843
 844                                 rsi_set_vap_capabilities(common, RSI_OPMODE_AP,
 845                                                          vif->addr, vif_info->vap_id,
 846                                                          VAP_UPDATE);
 847                         }
 848                 }
 849                 adapter->ps_info.listen_interval =
 850                         bss->beacon_int * adapter->ps_info.num_bcns_per_lis_int;
 851         }
 852
 853         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
 854             ((vif->type == NL80211_IFTYPE_AP) ||
 855              (vif->type == NL80211_IFTYPE_P2P_GO))) {
 856                 if (bss->enable_beacon) {
 857                         rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
 858                         common->beacon_enabled = 1;
 859                 } else {
 860                         rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
 861                         common->beacon_enabled = 0;
 862                 }
 863         }
 864
 865         mutex_unlock(&common->mutex);
 866 }
 867
 868 /**
 869  * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
 870  * @hw: Pointer to the ieee80211_hw structure.
 871  * @changed_flags: Changed flags set.
 872  * @total_flags: Total initial flags set.
 873  * @multicast: Multicast.
 874  *
 875  * Return: None.
 876  */
 877 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
 878                                      u32 changed_flags,
 879                                      u32 *total_flags,
 880                                      u64 multicast)
 881 {
 882         /* Not doing much here as of now */
 883         *total_flags &= RSI_SUPP_FILTERS;
 884 }
 885
 886 /**
 887  * rsi_mac80211_conf_tx() - This function configures TX queue parameters
 888  *                          (EDCF (aifs, cw_min, cw_max), bursting)
 889  *                          for a hardware TX queue.
 890  * @hw: Pointer to the ieee80211_hw structure
 891  * @vif: Pointer to the ieee80211_vif structure.
 892  * @link_id: the link ID if MLO is used, otherwise 0
 893  * @queue: Queue number.
 894  * @params: Pointer to ieee80211_tx_queue_params structure.
 895  *
 896  * Return: 0 on success, negative error code on failure.
 897  */
 898 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
 899                                 struct ieee80211_vif *vif,
 900                                 unsigned int link_id, u16 queue,
 901                                 const struct ieee80211_tx_queue_params *params)
 902 {
 903         struct rsi_hw *adapter = hw->priv;
 904         struct rsi_common *common = adapter->priv;
 905         u8 idx = 0;
 906
 907         if (queue >= IEEE80211_NUM_ACS)
 908                 return 0;
 909
 910         rsi_dbg(INFO_ZONE,
 911                 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
 912                 __func__, queue, params->aifs,
 913                 params->cw_min, params->cw_max, params->txop);
 914
 915         mutex_lock(&common->mutex);
 916         /* Map into the way the f/w expects */
 917         switch (queue) {
 918         case IEEE80211_AC_VO:
 919                 idx = VO_Q;
 920                 break;
 921         case IEEE80211_AC_VI:
 922                 idx = VI_Q;
 923                 break;
 924         case IEEE80211_AC_BE:
 925                 idx = BE_Q;
 926                 break;
 927         case IEEE80211_AC_BK:
 928                 idx = BK_Q;
 929                 break;
 930         default:
 931                 idx = BE_Q;
 932                 break;
 933         }
 934
 935         memcpy(&common->edca_params[idx],
 936                params,
 937                sizeof(struct ieee80211_tx_queue_params));
 938
 939         if (params->uapsd)
 940                 common->uapsd_bitmap |= idx;
 941         else
 942                 common->uapsd_bitmap &= (~idx);
 943
 944         mutex_unlock(&common->mutex);
 945
 946         return 0;
 947 }
 948
 949 /**
 950  * rsi_hal_key_config() - This function loads the keys into the firmware.
 951  * @hw: Pointer to the ieee80211_hw structure.
 952  * @vif: Pointer to the ieee80211_vif structure.
 953  * @key: Pointer to the ieee80211_key_conf structure.
 954  * @sta: Pointer to the ieee80211_sta structure.
 955  *
 956  * Return: status: 0 on success, negative error codes on failure.
 957  */
 958 static int rsi_hal_key_config(struct ieee80211_hw *hw,
 959                               struct ieee80211_vif *vif,
 960                               struct ieee80211_key_conf *key,
 961                               struct ieee80211_sta *sta)
 962 {
 963         struct rsi_hw *adapter = hw->priv;
 964         struct rsi_sta *rsta = NULL;
 965         int status;
 966         u8 key_type;
 967         s16 sta_id = 0;
 968
 969         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 970                 key_type = RSI_PAIRWISE_KEY;
 971         else
 972                 key_type = RSI_GROUP_KEY;
 973
 974         rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
 975                 __func__, key->cipher, key_type, key->keylen);
 976
 977         if ((vif->type == NL80211_IFTYPE_AP) ||
 978             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 979                 if (sta) {
 980                         rsta = rsi_find_sta(adapter->priv, sta->addr);
 981                         if (rsta)
 982                                 sta_id = rsta->sta_id;
 983                 }
 984                 adapter->priv->key = key;
 985         } else {
 986                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
 987                     (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 988                         status = rsi_hal_load_key(adapter->priv,
 989                                                   key->key,
 990                                                   key->keylen,
 991                                                   RSI_PAIRWISE_KEY,
 992                                                   key->keyidx,
 993                                                   key->cipher,
 994                                                   sta_id,
 995                                                   vif);
 996                         if (status)
 997                                 return status;
 998                 }
 999         }
1000
1001         status = rsi_hal_load_key(adapter->priv,
1002                                   key->key,
1003                                   key->keylen,
1004                                   key_type,
1005                                   key->keyidx,
1006                                   key->cipher,
1007                                   sta_id,
1008                                   vif);
1009         if (status)
1010                 return status;
1011
1012         if (vif->type == NL80211_IFTYPE_STATION &&
1013             (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
1014              key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
1015                 if (!rsi_send_block_unblock_frame(adapter->priv, false))
1016                         adapter->priv->hw_data_qs_blocked = false;
1017         }
1018
1019         return 0;
1020 }
1021
1022 /**
1023  * rsi_mac80211_set_key() - This function sets type of key to be loaded.
1024  * @hw: Pointer to the ieee80211_hw structure.
1025  * @cmd: enum set_key_cmd.
1026  * @vif: Pointer to the ieee80211_vif structure.
1027  * @sta: Pointer to the ieee80211_sta structure.
1028  * @key: Pointer to the ieee80211_key_conf structure.
1029  *
1030  * Return: status: 0 on success, negative error code on failure.
1031  */
1032 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
1033                                 enum set_key_cmd cmd,
1034                                 struct ieee80211_vif *vif,
1035                                 struct ieee80211_sta *sta,
1036                                 struct ieee80211_key_conf *key)
1037 {
1038         struct rsi_hw *adapter = hw->priv;
1039         struct rsi_common *common = adapter->priv;
1040         struct security_info *secinfo = &common->secinfo;
1041         int status;
1042
1043         mutex_lock(&common->mutex);
1044         switch (cmd) {
1045         case SET_KEY:
1046                 status = rsi_hal_key_config(hw, vif, key, sta);
1047                 if (status) {
1048                         mutex_unlock(&common->mutex);
1049                         return status;
1050                 }
1051
1052                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
1053                         secinfo->ptk_cipher = key->cipher;
1054                 else
1055                         secinfo->gtk_cipher = key->cipher;
1056
1057                 key->hw_key_idx = key->keyidx;
1058                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1059
1060                 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
1061                 break;
1062
1063         case DISABLE_KEY:
1064                 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
1065                 memset(key, 0, sizeof(struct ieee80211_key_conf));
1066                 status = rsi_hal_key_config(hw, vif, key, sta);
1067                 break;
1068
1069         default:
1070                 status = -EOPNOTSUPP;
1071                 break;
1072         }
1073
1074         mutex_unlock(&common->mutex);
1075         return status;
1076 }
1077
1078 /**
1079  * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
1080  *                               the corresponding mlme_action flag and
1081  *                               informs the f/w regarding this.
1082  * @hw: Pointer to the ieee80211_hw structure.
1083  * @vif: Pointer to the ieee80211_vif structure.
1084  * @params: Pointer to A-MPDU action parameters
1085  *
1086  * Return: status: 0 on success, negative error code on failure.
1087  */
1088 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1089                                      struct ieee80211_vif *vif,
1090                                      struct ieee80211_ampdu_params *params)
1091 {
1092         int status = -EOPNOTSUPP;
1093         struct rsi_hw *adapter = hw->priv;
1094         struct rsi_common *common = adapter->priv;
1095         struct rsi_sta *rsta = NULL;
1096         u16 seq_no = 0, seq_start = 0;
1097         u8 ii = 0;
1098         struct ieee80211_sta *sta = params->sta;
1099         u8 sta_id = 0;
1100         enum ieee80211_ampdu_mlme_action action = params->action;
1101         u16 tid = params->tid;
1102         u16 *ssn = &params->ssn;
1103         u8 buf_size = params->buf_size;
1104
1105         for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1106                 if (vif == adapter->vifs[ii])
1107                         break;
1108         }
1109
1110         if (ii >= RSI_MAX_VIFS)
1111                 return status;
1112
1113         mutex_lock(&common->mutex);
1114
1115         if (ssn != NULL)
1116                 seq_no = *ssn;
1117
1118         if ((vif->type == NL80211_IFTYPE_AP) ||
1119             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1120                 rsta = rsi_find_sta(common, sta->addr);
1121                 if (!rsta) {
1122                         rsi_dbg(ERR_ZONE, "No station mapped\n");
1123                         status = 0;
1124                         goto unlock;
1125                 }
1126                 sta_id = rsta->sta_id;
1127         }
1128
1129         rsi_dbg(INFO_ZONE,
1130                 "%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1131                 __func__, tid, seq_no, buf_size, sta_id);
1132
1133         switch (action) {
1134         case IEEE80211_AMPDU_RX_START:
1135                 status = rsi_send_aggregation_params_frame(common,
1136                                                            tid,
1137                                                            seq_no,
1138                                                            buf_size,
1139                                                            STA_RX_ADDBA_DONE,
1140                                                            sta_id);
1141                 break;
1142
1143         case IEEE80211_AMPDU_RX_STOP:
1144                 status = rsi_send_aggregation_params_frame(common,
1145                                                            tid,
1146                                                            0,
1147                                                            buf_size,
1148                                                            STA_RX_DELBA,
1149                                                            sta_id);
1150                 break;
1151
1152         case IEEE80211_AMPDU_TX_START:
1153                 if ((vif->type == NL80211_IFTYPE_STATION) ||
1154                     (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1155                         common->vif_info[ii].seq_start = seq_no;
1156                 else if ((vif->type == NL80211_IFTYPE_AP) ||
1157                          (vif->type == NL80211_IFTYPE_P2P_GO))
1158                         rsta->seq_start[tid] = seq_no;
1159                 status = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1160                 break;
1161
1162         case IEEE80211_AMPDU_TX_STOP_CONT:
1163         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1164         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1165                 status = rsi_send_aggregation_params_frame(common,
1166                                                            tid,
1167                                                            seq_no,
1168                                                            buf_size,
1169                                                            STA_TX_DELBA,
1170                                                            sta_id);
1171                 if (!status)
1172                         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1173                 break;
1174
1175         case IEEE80211_AMPDU_TX_OPERATIONAL:
1176                 if ((vif->type == NL80211_IFTYPE_STATION) ||
1177                     (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1178                         seq_start = common->vif_info[ii].seq_start;
1179                 else if ((vif->type == NL80211_IFTYPE_AP) ||
1180                          (vif->type == NL80211_IFTYPE_P2P_GO))
1181                         seq_start = rsta->seq_start[tid];
1182                 status = rsi_send_aggregation_params_frame(common,
1183                                                            tid,
1184                                                            seq_start,
1185                                                            buf_size,
1186                                                            STA_TX_ADDBA_DONE,
1187                                                            sta_id);
1188                 break;
1189
1190         default:
1191                 rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1192                 break;
1193         }
1194
1195 unlock:
1196         mutex_unlock(&common->mutex);
1197         return status;
1198 }
1199
1200 /**
1201  * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1202  * @hw: Pointer to the ieee80211_hw structure.
1203  * @value: Rts threshold value.
1204  *
1205  * Return: 0 on success.
1206  */
1207 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1208                                           u32 value)
1209 {
1210         struct rsi_hw *adapter = hw->priv;
1211         struct rsi_common *common = adapter->priv;
1212
1213         mutex_lock(&common->mutex);
1214         common->rts_threshold = value;
1215         mutex_unlock(&common->mutex);
1216
1217         return 0;
1218 }
1219
1220 /**
1221  * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1222  * @hw: Pointer to the ieee80211_hw structure
1223  * @vif: Pointer to the ieee80211_vif structure.
1224  * @mask: Pointer to the cfg80211_bitrate_mask structure.
1225  *
1226  * Return: 0 on success.
1227  */
1228 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1229                                       struct ieee80211_vif *vif,
1230                                       const struct cfg80211_bitrate_mask *mask)
1231 {
1232         const unsigned int mcs_offset = ARRAY_SIZE(rsi_rates);
1233         struct rsi_hw *adapter = hw->priv;
1234         struct rsi_common *common = adapter->priv;
1235         int i;
1236
1237         mutex_lock(&common->mutex);
1238
1239         for (i = 0; i < ARRAY_SIZE(common->rate_config); i++) {
1240                 struct rsi_rate_config *cfg = &common->rate_config[i];
1241                 u32 bm;
1242
1243                 bm = mask->control[i].legacy | (mask->control[i].ht_mcs[0] << mcs_offset);
1244                 if (hweight32(bm) == 1) { /* single rate */
1245                         int rate_index = ffs(bm) - 1;
1246
1247                         if (rate_index < mcs_offset)
1248                                 cfg->fixed_hw_rate = rsi_rates[rate_index].hw_value;
1249                         else
1250                                 cfg->fixed_hw_rate = rsi_mcsrates[rate_index - mcs_offset];
1251                         cfg->fixed_enabled = true;
1252                 } else {
1253                         cfg->configured_mask = bm;
1254                         cfg->fixed_enabled = false;
1255                 }
1256         }
1257
1258         mutex_unlock(&common->mutex);
1259
1260         return 0;
1261 }
1262
1263 /**
1264  * rsi_perform_cqm() - This function performs cqm.
1265  * @common: Pointer to the driver private structure.
1266  * @bssid: pointer to the bssid.
1267  * @rssi: RSSI value.
1268  * @vif: Pointer to the ieee80211_vif structure.
1269  */
1270 static void rsi_perform_cqm(struct rsi_common *common,
1271                             u8 *bssid,
1272                             s8 rssi,
1273                             struct ieee80211_vif *vif)
1274 {
1275         s8 last_event = common->cqm_info.last_cqm_event_rssi;
1276         int thold = common->cqm_info.rssi_thold;
1277         u32 hyst = common->cqm_info.rssi_hyst;
1278         enum nl80211_cqm_rssi_threshold_event event;
1279
1280         if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1281                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1282         else if (rssi > thold &&
1283                  (last_event == 0 || rssi > (last_event + hyst)))
1284                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1285         else
1286                 return;
1287
1288         common->cqm_info.last_cqm_event_rssi = rssi;
1289         rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1290         ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1291
1292         return;
1293 }
1294
1295 /**
1296  * rsi_fill_rx_status() - This function fills rx status in
1297  *                        ieee80211_rx_status structure.
1298  * @hw: Pointer to the ieee80211_hw structure.
1299  * @skb: Pointer to the socket buffer structure.
1300  * @common: Pointer to the driver private structure.
1301  * @rxs: Pointer to the ieee80211_rx_status structure.
1302  *
1303  * Return: None.
1304  */
1305 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1306                                struct sk_buff *skb,
1307                                struct rsi_common *common,
1308                                struct ieee80211_rx_status *rxs)
1309 {
1310         struct rsi_hw *adapter = common->priv;
1311         struct ieee80211_vif *vif;
1312         struct ieee80211_bss_conf *bss = NULL;
1313         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1314         struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1315         struct ieee80211_hdr *hdr;
1316         char rssi = rx_params->rssi;
1317         u8 hdrlen = 0;
1318         u8 channel = rx_params->channel;
1319         s32 freq;
1320         int i;
1321
1322         hdr = ((struct ieee80211_hdr *)(skb->data));
1323         hdrlen = ieee80211_hdrlen(hdr->frame_control);
1324
1325         memset(info, 0, sizeof(struct ieee80211_tx_info));
1326
1327         rxs->signal = -(rssi);
1328
1329         rxs->band = common->band;
1330
1331         freq = ieee80211_channel_to_frequency(channel, rxs->band);
1332
1333         if (freq)
1334                 rxs->freq = freq;
1335
1336         if (ieee80211_has_protected(hdr->frame_control)) {
1337                 if (rsi_is_cipher_wep(common)) {
1338                         memmove(skb->data + 4, skb->data, hdrlen);
1339                         skb_pull(skb, 4);
1340                 } else {
1341                         memmove(skb->data + 8, skb->data, hdrlen);
1342                         skb_pull(skb, 8);
1343                         rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1344                 }
1345                 rxs->flag |= RX_FLAG_DECRYPTED;
1346                 rxs->flag |= RX_FLAG_IV_STRIPPED;
1347         }
1348
1349         for (i = 0; i < RSI_MAX_VIFS; i++) {
1350                 vif = adapter->vifs[i];
1351                 if (!vif)
1352                         continue;
1353                 if (vif->type == NL80211_IFTYPE_STATION) {
1354                         bss = &vif->bss_conf;
1355                         break;
1356                 }
1357         }
1358         if (!bss)
1359                 return;
1360         /* CQM only for connected AP beacons, the RSSI is a weighted avg */
1361         if (vif->cfg.assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1362                 if (ieee80211_is_beacon(hdr->frame_control))
1363                         rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1364         }
1365
1366         return;
1367 }
1368
1369 /**
1370  * rsi_indicate_pkt_to_os() - This function sends received packet to mac80211.
1371  * @common: Pointer to the driver private structure.
1372  * @skb: Pointer to the socket buffer structure.
1373  *
1374  * Return: None.
1375  */
1376 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1377                             struct sk_buff *skb)
1378 {
1379         struct rsi_hw *adapter = common->priv;
1380         struct ieee80211_hw *hw = adapter->hw;
1381         struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1382
1383         if ((common->iface_down) || (!adapter->sc_nvifs)) {
1384                 dev_kfree_skb(skb);
1385                 return;
1386         }
1387
1388         /* filling in the ieee80211_rx_status flags */
1389         rsi_fill_rx_status(hw, skb, common, rx_status);
1390
1391         ieee80211_rx_irqsafe(hw, skb);
1392 }
1393
1394 /**
1395  * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1396  *                          connected.
1397  * @hw: pointer to the ieee80211_hw structure.
1398  * @vif: Pointer to the ieee80211_vif structure.
1399  * @sta: Pointer to the ieee80211_sta structure.
1400  *
1401  * Return: 0 on success, negative error codes on failure.
1402  */
1403 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1404                                 struct ieee80211_vif *vif,
1405                                 struct ieee80211_sta *sta)
1406 {
1407         struct rsi_hw *adapter = hw->priv;
1408         struct rsi_common *common = adapter->priv;
1409         bool sta_exist = false;
1410         struct rsi_sta *rsta;
1411         int status = 0;
1412
1413         rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1414
1415         mutex_lock(&common->mutex);
1416
1417         if ((vif->type == NL80211_IFTYPE_AP) ||
1418             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1419                 u8 cnt;
1420                 int sta_idx = -1;
1421                 int free_index = -1;
1422
1423                 /* Check if max stations reached */
1424                 if (common->num_stations >= common->max_stations) {
1425                         rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1426                         status = -EOPNOTSUPP;
1427                         goto unlock;
1428                 }
1429                 for (cnt = 0; cnt < common->max_stations; cnt++) {
1430                         rsta = &common->stations[cnt];
1431
1432                         if (!rsta->sta) {
1433                                 if (free_index < 0)
1434                                         free_index = cnt;
1435                                 continue;
1436                         }
1437                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1438                                 rsi_dbg(INFO_ZONE, "Station exists\n");
1439                                 sta_idx = cnt;
1440                                 sta_exist = true;
1441                                 break;
1442                         }
1443                 }
1444                 if (!sta_exist) {
1445                         if (free_index >= 0)
1446                                 sta_idx = free_index;
1447                 }
1448                 if (sta_idx < 0) {
1449                         rsi_dbg(ERR_ZONE,
1450                                 "%s: Some problem reaching here...\n",
1451                                 __func__);
1452                         status = -EINVAL;
1453                         goto unlock;
1454                 }
1455                 rsta = &common->stations[sta_idx];
1456                 rsta->sta = sta;
1457                 rsta->sta_id = sta_idx;
1458                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1459                         rsta->start_tx_aggr[cnt] = false;
1460                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1461                         rsta->seq_start[cnt] = 0;
1462                 if (!sta_exist) {
1463                         rsi_dbg(INFO_ZONE, "New Station\n");
1464
1465                         /* Send peer notify to device */
1466                         rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1467                         rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1468                                               sta->addr, sta->wme, sta->aid,
1469                                               sta, sta_idx, 0, vif);
1470
1471                         if (common->key) {
1472                                 struct ieee80211_key_conf *key = common->key;
1473
1474                                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1475                                     (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1476                                         rsi_hal_load_key(adapter->priv,
1477                                                          key->key,
1478                                                          key->keylen,
1479                                                          RSI_PAIRWISE_KEY,
1480                                                          key->keyidx,
1481                                                          key->cipher,
1482                                                          sta_idx,
1483                                                          vif);
1484                         }
1485
1486                         common->num_stations++;
1487                 }
1488         }
1489
1490         if ((vif->type == NL80211_IFTYPE_STATION) ||
1491             (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1492                 common->bitrate_mask[common->band] = sta->deflink.supp_rates[common->band];
1493                 common->vif_info[0].is_ht = sta->deflink.ht_cap.ht_supported;
1494                 if (sta->deflink.ht_cap.ht_supported) {
1495                         common->bitrate_mask[NL80211_BAND_2GHZ] =
1496                                         sta->deflink.supp_rates[NL80211_BAND_2GHZ];
1497                         if ((sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1498                             (sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1499                                 common->vif_info[0].sgi = true;
1500                         ieee80211_start_tx_ba_session(sta, 0, 0);
1501                 }
1502         }
1503
1504 unlock:
1505         mutex_unlock(&common->mutex);
1506
1507         return status;
1508 }
1509
1510 /**
1511  * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1512  *                             getting disconnected.
1513  * @hw: Pointer to the ieee80211_hw structure.
1514  * @vif: Pointer to the ieee80211_vif structure.
1515  * @sta: Pointer to the ieee80211_sta structure.
1516  *
1517  * Return: 0 on success, negative error codes on failure.
1518  */
1519 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1520                                    struct ieee80211_vif *vif,
1521                                    struct ieee80211_sta *sta)
1522 {
1523         struct rsi_hw *adapter = hw->priv;
1524         struct rsi_common *common = adapter->priv;
1525         struct ieee80211_bss_conf *bss = &vif->bss_conf;
1526         struct rsi_sta *rsta;
1527
1528         rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1529
1530         mutex_lock(&common->mutex);
1531
1532         if ((vif->type == NL80211_IFTYPE_AP) ||
1533             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1534                 u8 sta_idx, cnt;
1535
1536                 /* Send peer notify to device */
1537                 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1538                 for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1539                         rsta = &common->stations[sta_idx];
1540
1541                         if (!rsta->sta)
1542                                 continue;
1543                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1544                                 rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1545                                                       sta->addr, sta->wme,
1546                                                       sta->aid, sta, sta_idx,
1547                                                       0, vif);
1548                                 rsta->sta = NULL;
1549                                 rsta->sta_id = -1;
1550                                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1551                                         rsta->start_tx_aggr[cnt] = false;
1552                                 if (common->num_stations > 0)
1553                                         common->num_stations--;
1554                                 break;
1555                         }
1556                 }
1557                 if (sta_idx >= common->max_stations)
1558                         rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1559         }
1560
1561         if ((vif->type == NL80211_IFTYPE_STATION) ||
1562             (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1563                 /* Resetting all the fields to default values */
1564                 memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1565                 bss->qos = sta->wme;
1566                 common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1567                 common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1568                 common->vif_info[0].is_ht = false;
1569                 common->vif_info[0].sgi = false;
1570                 common->vif_info[0].seq_start = 0;
1571                 common->secinfo.ptk_cipher = 0;
1572                 common->secinfo.gtk_cipher = 0;
1573                 if (!common->iface_down)
1574                         rsi_send_rx_filter_frame(common, 0);
1575         }
1576         mutex_unlock(&common->mutex);
1577
1578         return 0;
1579 }
1580
1581 /**
1582  * rsi_mac80211_set_antenna() - This function is used to configure
1583  *                              tx and rx antennas.
1584  * @hw: Pointer to the ieee80211_hw structure.
1585  * @tx_ant: Bitmap for tx antenna
1586  * @rx_ant: Bitmap for rx antenna
1587  *
1588  * Return: 0 on success, Negative error code on failure.
1589  */
1590 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1591                                     u32 tx_ant, u32 rx_ant)
1592 {
1593         struct rsi_hw *adapter = hw->priv;
1594         struct rsi_common *common = adapter->priv;
1595         u8 antenna = 0;
1596
1597         if (tx_ant > 1 || rx_ant > 1) {
1598                 rsi_dbg(ERR_ZONE,
1599                         "Invalid antenna selection (tx: %d, rx:%d)\n",
1600                         tx_ant, rx_ant);
1601                 rsi_dbg(ERR_ZONE,
1602                         "Use 0 for int_ant, 1 for ext_ant\n");
1603                 return -EINVAL;
1604         }
1605
1606         rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1607                         __func__, tx_ant, rx_ant);
1608
1609         mutex_lock(&common->mutex);
1610
1611         antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1612         if (common->ant_in_use != antenna)
1613                 if (rsi_set_antenna(common, antenna))
1614                         goto fail_set_antenna;
1615
1616         rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1617                 tx_ant ? "UFL" : "INT");
1618
1619         common->ant_in_use = antenna;
1620
1621         mutex_unlock(&common->mutex);
1622
1623         return 0;
1624
1625 fail_set_antenna:
1626         rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1627         mutex_unlock(&common->mutex);
1628         return -EINVAL;
1629 }
1630
1631 /**
1632  * rsi_mac80211_get_antenna() - This function is used to configure
1633  *                              tx and rx antennas.
1634  *
1635  * @hw: Pointer to the ieee80211_hw structure.
1636  * @tx_ant: Bitmap for tx antenna
1637  * @rx_ant: Bitmap for rx antenna
1638  *
1639  * Return: 0 on success, negative error codes on failure.
1640  */
1641 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1642                                     u32 *tx_ant, u32 *rx_ant)
1643 {
1644         struct rsi_hw *adapter = hw->priv;
1645         struct rsi_common *common = adapter->priv;
1646
1647         mutex_lock(&common->mutex);
1648
1649         *tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1650         *rx_ant = 0;
1651
1652         mutex_unlock(&common->mutex);
1653
1654         return 0;
1655 }
1656
1657 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1658 {
1659         switch (region_code) {
1660         case NL80211_DFS_FCC:
1661                 return RSI_REGION_FCC;
1662         case NL80211_DFS_ETSI:
1663                 return RSI_REGION_ETSI;
1664         case NL80211_DFS_JP:
1665                 return RSI_REGION_TELEC;
1666         case NL80211_DFS_UNSET:
1667                 return RSI_REGION_WORLD;
1668         }
1669         return RSI_REGION_WORLD;
1670 }
1671
1672 static void rsi_reg_notify(struct wiphy *wiphy,
1673                            struct regulatory_request *request)
1674 {
1675         struct ieee80211_supported_band *sband;
1676         struct ieee80211_channel *ch;
1677         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1678         struct rsi_hw * adapter = hw->priv;
1679         struct rsi_common *common = adapter->priv;
1680         int i;
1681
1682         mutex_lock(&common->mutex);
1683
1684         rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1685                 request->alpha2, request->dfs_region);
1686
1687         if (common->num_supp_bands > 1) {
1688                 sband = wiphy->bands[NL80211_BAND_5GHZ];
1689
1690                 for (i = 0; i < sband->n_channels; i++) {
1691                         ch = &sband->channels[i];
1692                         if (ch->flags & IEEE80211_CHAN_DISABLED)
1693                                 continue;
1694
1695                         if (ch->flags & IEEE80211_CHAN_RADAR)
1696                                 ch->flags |= IEEE80211_CHAN_NO_IR;
1697                 }
1698         }
1699         adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1700         rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1701
1702         adapter->country[0] = request->alpha2[0];
1703         adapter->country[1] = request->alpha2[1];
1704
1705         mutex_unlock(&common->mutex);
1706 }
1707
1708 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1709 {
1710         struct rsi_hw *adapter = hw->priv;
1711         struct rsi_common *common = adapter->priv;
1712
1713         mutex_lock(&common->mutex);
1714         if (common->fsm_state != FSM_MAC_INIT_DONE)
1715                 wiphy_rfkill_set_hw_state(hw->wiphy, true);
1716         else
1717                 wiphy_rfkill_set_hw_state(hw->wiphy, false);
1718         mutex_unlock(&common->mutex);
1719 }
1720
1721 static void rsi_resume_conn_channel(struct rsi_common *common)
1722 {
1723         struct rsi_hw *adapter = common->priv;
1724         struct ieee80211_vif *vif;
1725         int cnt;
1726
1727         for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1728                 vif = adapter->vifs[cnt];
1729                 if (!vif)
1730                         continue;
1731
1732                 if ((vif->type == NL80211_IFTYPE_AP) ||
1733                     (vif->type == NL80211_IFTYPE_P2P_GO)) {
1734                         rsi_switch_channel(adapter, vif);
1735                         break;
1736                 }
1737                 if (((vif->type == NL80211_IFTYPE_STATION) ||
1738                      (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1739                     vif->cfg.assoc) {
1740                         rsi_switch_channel(adapter, vif);
1741                         break;
1742                 }
1743         }
1744 }
1745
1746 void rsi_roc_timeout(struct timer_list *t)
1747 {
1748         struct rsi_common *common = from_timer(common, t, roc_timer);
1749
1750         rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1751
1752         mutex_lock(&common->mutex);
1753         ieee80211_remain_on_channel_expired(common->priv->hw);
1754
1755         if (timer_pending(&common->roc_timer))
1756                 del_timer(&common->roc_timer);
1757
1758         rsi_resume_conn_channel(common);
1759         mutex_unlock(&common->mutex);
1760 }
1761
1762 static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1763                             struct ieee80211_channel *chan, int duration,
1764                             enum ieee80211_roc_type type)
1765 {
1766         struct rsi_hw *adapter = hw->priv;
1767         struct rsi_common *common = adapter->priv;
1768         int status = 0;
1769
1770         rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1771
1772         mutex_lock(&common->mutex);
1773         rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1774                 __func__, chan->hw_value, duration);
1775
1776         if (timer_pending(&common->roc_timer)) {
1777                 rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1778                 del_timer(&common->roc_timer);
1779         }
1780         common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1781         add_timer(&common->roc_timer);
1782
1783         /* Configure band */
1784         if (rsi_band_check(common, chan)) {
1785                 rsi_dbg(ERR_ZONE, "Failed to set band\n");
1786                 status = -EINVAL;
1787                 goto out;
1788         }
1789
1790         /* Configure channel */
1791         if (rsi_set_channel(common, chan)) {
1792                 rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1793                 status = -EINVAL;
1794                 goto out;
1795         }
1796
1797         common->roc_vif = vif;
1798         ieee80211_ready_on_channel(hw);
1799         rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1800                 __func__, chan->hw_value);
1801
1802 out:
1803         mutex_unlock(&common->mutex);
1804
1805         return status;
1806 }
1807
1808 static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw,
1809                                    struct ieee80211_vif *vif)
1810 {
1811         struct rsi_hw *adapter = hw->priv;
1812         struct rsi_common *common = adapter->priv;
1813
1814         rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1815
1816         mutex_lock(&common->mutex);
1817         if (!timer_pending(&common->roc_timer)) {
1818                 mutex_unlock(&common->mutex);
1819                 return 0;
1820         }
1821
1822         del_timer(&common->roc_timer);
1823
1824         rsi_resume_conn_channel(common);
1825         mutex_unlock(&common->mutex);
1826
1827         return 0;
1828 }
1829
1830 #ifdef CONFIG_PM
1831 static const struct wiphy_wowlan_support rsi_wowlan_support = {
1832         .flags = WIPHY_WOWLAN_ANY |
1833                  WIPHY_WOWLAN_MAGIC_PKT |
1834                  WIPHY_WOWLAN_DISCONNECT |
1835                  WIPHY_WOWLAN_GTK_REKEY_FAILURE  |
1836                  WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1837                  WIPHY_WOWLAN_EAP_IDENTITY_REQ   |
1838                  WIPHY_WOWLAN_4WAY_HANDSHAKE,
1839 };
1840
1841 static u16 rsi_wow_map_triggers(struct rsi_common *common,
1842                                 struct cfg80211_wowlan *wowlan)
1843 {
1844         u16 wow_triggers = 0;
1845
1846         rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1847
1848         if (wowlan->any)
1849                 wow_triggers |= RSI_WOW_ANY;
1850         if (wowlan->magic_pkt)
1851                 wow_triggers |= RSI_WOW_MAGIC_PKT;
1852         if (wowlan->disconnect)
1853                 wow_triggers |= RSI_WOW_DISCONNECT;
1854         if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1855             wowlan->four_way_handshake)
1856                 wow_triggers |= RSI_WOW_GTK_REKEY;
1857
1858         return wow_triggers;
1859 }
1860
1861 int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1862 {
1863         struct rsi_common *common = adapter->priv;
1864         struct ieee80211_vif *vif = adapter->vifs[0];
1865         u16 triggers = 0;
1866         u16 rx_filter_word = 0;
1867
1868         rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1869
1870         if (!vif)
1871                 return -EINVAL;
1872
1873         if (WARN_ON(!wowlan)) {
1874                 rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1875                 return -EINVAL;
1876         }
1877
1878         common->wow_flags |= RSI_WOW_ENABLED;
1879         triggers = rsi_wow_map_triggers(common, wowlan);
1880         if (!triggers) {
1881                 rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1882                 return -EINVAL;
1883         }
1884         if (!vif->cfg.assoc) {
1885                 rsi_dbg(ERR_ZONE,
1886                         "Cannot configure WoWLAN (Station not connected)\n");
1887                 common->wow_flags |= RSI_WOW_NO_CONNECTION;
1888                 return 0;
1889         }
1890         rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1891
1892         if (common->coex_mode > 1)
1893                 rsi_disable_ps(adapter, adapter->vifs[0]);
1894
1895         rsi_send_wowlan_request(common, triggers, 1);
1896
1897         /**
1898          * Increase the beacon_miss threshold & keep-alive timers in
1899          * vap_update frame
1900          */
1901         rsi_send_vap_dynamic_update(common);
1902
1903         rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1904         rsi_send_rx_filter_frame(common, rx_filter_word);
1905
1906         return 0;
1907 }
1908 EXPORT_SYMBOL(rsi_config_wowlan);
1909
1910 static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1911                                 struct cfg80211_wowlan *wowlan)
1912 {
1913         struct rsi_hw *adapter = hw->priv;
1914         struct rsi_common *common = adapter->priv;
1915
1916         rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1917         mutex_lock(&common->mutex);
1918         if (rsi_config_wowlan(adapter, wowlan)) {
1919                 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1920                 mutex_unlock(&common->mutex);
1921                 return 1;
1922         }
1923         mutex_unlock(&common->mutex);
1924
1925         return 0;
1926 }
1927
1928 static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1929 {
1930         u16 rx_filter_word = 0;
1931         struct rsi_hw *adapter = hw->priv;
1932         struct rsi_common *common = adapter->priv;
1933
1934         common->wow_flags = 0;
1935
1936         rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1937
1938         if (common->hibernate_resume) {
1939                 common->mac_ops_resumed = true;
1940                 /* Device need a complete restart of all MAC operations.
1941                  * returning 1 will serve this purpose.
1942                  */
1943                 return 1;
1944         }
1945
1946         mutex_lock(&common->mutex);
1947         rsi_send_wowlan_request(common, 0, 0);
1948
1949         rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1950                           ALLOW_MGMT_ASSOC_PEER);
1951         rsi_send_rx_filter_frame(common, rx_filter_word);
1952         mutex_unlock(&common->mutex);
1953
1954         return 0;
1955 }
1956
1957 #endif
1958
1959 static const struct ieee80211_ops mac80211_ops = {
1960         .tx = rsi_mac80211_tx,
1961         .wake_tx_queue = ieee80211_handle_wake_tx_queue,
1962         .start = rsi_mac80211_start,
1963         .stop = rsi_mac80211_stop,
1964         .add_interface = rsi_mac80211_add_interface,
1965         .remove_interface = rsi_mac80211_remove_interface,
1966         .config = rsi_mac80211_config,
1967         .bss_info_changed = rsi_mac80211_bss_info_changed,
1968         .conf_tx = rsi_mac80211_conf_tx,
1969         .configure_filter = rsi_mac80211_conf_filter,
1970         .set_key = rsi_mac80211_set_key,
1971         .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1972         .set_bitrate_mask = rsi_mac80211_set_rate_mask,
1973         .ampdu_action = rsi_mac80211_ampdu_action,
1974         .sta_add = rsi_mac80211_sta_add,
1975         .sta_remove = rsi_mac80211_sta_remove,
1976         .set_antenna = rsi_mac80211_set_antenna,
1977         .get_antenna = rsi_mac80211_get_antenna,
1978         .rfkill_poll = rsi_mac80211_rfkill_poll,
1979         .remain_on_channel = rsi_mac80211_roc,
1980         .cancel_remain_on_channel = rsi_mac80211_cancel_roc,
1981 #ifdef CONFIG_PM
1982         .suspend = rsi_mac80211_suspend,
1983         .resume  = rsi_mac80211_resume,
1984 #endif
1985         .hw_scan = rsi_mac80211_hw_scan_start,
1986         .cancel_hw_scan = rsi_mac80211_cancel_hw_scan,
1987 };
1988
1989 /**
1990  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1991  * @common: Pointer to the driver private structure.
1992  *
1993  * Return: 0 on success, negative error codes on failure.
1994  */
1995 int rsi_mac80211_attach(struct rsi_common *common)
1996 {
1997         int status = 0;
1998         struct ieee80211_hw *hw = NULL;
1999         struct wiphy *wiphy = NULL;
2000         struct rsi_hw *adapter = common->priv;
2001         u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
2002
2003         rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
2004
2005         hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
2006         if (!hw) {
2007                 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
2008                 return -ENOMEM;
2009         }
2010
2011         wiphy = hw->wiphy;
2012
2013         SET_IEEE80211_DEV(hw, adapter->device);
2014
2015         hw->priv = adapter;
2016         adapter->hw = hw;
2017
2018         ieee80211_hw_set(hw, SIGNAL_DBM);
2019         ieee80211_hw_set(hw, HAS_RATE_CONTROL);
2020         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2021         ieee80211_hw_set(hw, SUPPORTS_PS);
2022         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
2023
2024         hw->queues = MAX_HW_QUEUES;
2025         hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
2026
2027         hw->max_rates = 1;
2028         hw->max_rate_tries = MAX_RETRIES;
2029         hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
2030         hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
2031
2032         hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
2033         hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
2034         hw->rate_control_algorithm = "AARF";
2035
2036         SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
2037         ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
2038
2039         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2040                                  BIT(NL80211_IFTYPE_AP) |
2041                                  BIT(NL80211_IFTYPE_P2P_DEVICE) |
2042                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
2043                                  BIT(NL80211_IFTYPE_P2P_GO);
2044
2045         wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
2046         wiphy->retry_short = RETRY_SHORT;
2047         wiphy->retry_long  = RETRY_LONG;
2048         wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
2049         wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
2050         wiphy->flags = 0;
2051
2052         wiphy->available_antennas_rx = 1;
2053         wiphy->available_antennas_tx = 1;
2054
2055         status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
2056         if (status)
2057                 return status;
2058         wiphy->bands[NL80211_BAND_2GHZ] =
2059                 &adapter->sbands[NL80211_BAND_2GHZ];
2060         if (common->num_supp_bands > 1) {
2061                 status = rsi_register_rates_channels(adapter,
2062                                                      NL80211_BAND_5GHZ);
2063                 if (status)
2064                         return status;
2065                 wiphy->bands[NL80211_BAND_5GHZ] =
2066                         &adapter->sbands[NL80211_BAND_5GHZ];
2067         }
2068
2069         /* AP Parameters */
2070         wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2071         common->max_stations = wiphy->max_ap_assoc_sta;
2072         rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2073         hw->sta_data_size = sizeof(struct rsi_sta);
2074
2075         wiphy->max_scan_ssids = RSI_MAX_SCAN_SSIDS;
2076         wiphy->max_scan_ie_len = RSI_MAX_SCAN_IE_LEN;
2077         wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2078         wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2079         wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2080         wiphy->reg_notifier = rsi_reg_notify;
2081
2082 #ifdef CONFIG_PM
2083         wiphy->wowlan = &rsi_wowlan_support;
2084 #endif
2085
2086         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2087
2088         /* Wi-Fi direct parameters */
2089         wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2090         wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2091         wiphy->max_remain_on_channel_duration = 10000;
2092         hw->max_listen_interval = 10;
2093         wiphy->iface_combinations = rsi_iface_combinations;
2094         wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2095
2096         if (common->coex_mode > 1)
2097                 wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2098
2099         status = ieee80211_register_hw(hw);
2100         if (status)
2101                 return status;
2102
2103         return rsi_init_dbgfs(adapter);
2104 }