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  * @suspend: true if the this was called from suspend flow.
 414  *
 415  * Return: None.
 416  */
 417 static void rsi_mac80211_stop(struct ieee80211_hw *hw, bool suspend)
 418 {
 419         struct rsi_hw *adapter = hw->priv;
 420         struct rsi_common *common = adapter->priv;
 421
 422         rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
 423         mutex_lock(&common->mutex);
 424         common->iface_down = true;
 425         wiphy_rfkill_stop_polling(hw->wiphy);
 426
 427         /* Block all rx frames */
 428         rsi_send_rx_filter_frame(common, 0xffff);
 429
 430         mutex_unlock(&common->mutex);
 431 }
 432
 433 static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
 434 {
 435         switch (vif_type) {
 436         case NL80211_IFTYPE_STATION:
 437                 return RSI_OPMODE_STA;
 438         case NL80211_IFTYPE_AP:
 439                 return RSI_OPMODE_AP;
 440         case NL80211_IFTYPE_P2P_DEVICE:
 441                 return RSI_OPMODE_P2P_CLIENT;
 442         case NL80211_IFTYPE_P2P_CLIENT:
 443                 return RSI_OPMODE_P2P_CLIENT;
 444         case NL80211_IFTYPE_P2P_GO:
 445                 return RSI_OPMODE_P2P_GO;
 446         default:
 447                 return RSI_OPMODE_UNSUPPORTED;
 448         }
 449 }
 450
 451 /**
 452  * rsi_mac80211_add_interface() - This function is called when a netdevice
 453  *                                attached to the hardware is enabled.
 454  * @hw: Pointer to the ieee80211_hw structure.
 455  * @vif: Pointer to the ieee80211_vif structure.
 456  *
 457  * Return: ret: 0 on success, negative error code on failure.
 458  */
 459 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
 460                                       struct ieee80211_vif *vif)
 461 {
 462         struct rsi_hw *adapter = hw->priv;
 463         struct rsi_common *common = adapter->priv;
 464         struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 465         enum opmode intf_mode;
 466         enum vap_status vap_status;
 467         int vap_idx = -1, i;
 468
 469         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
 470         mutex_lock(&common->mutex);
 471
 472         intf_mode = rsi_map_intf_mode(vif->type);
 473         if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
 474                 rsi_dbg(ERR_ZONE,
 475                         "%s: Interface type %d not supported\n", __func__,
 476                         vif->type);
 477                 mutex_unlock(&common->mutex);
 478                 return -EOPNOTSUPP;
 479         }
 480         if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
 481             (vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
 482             (vif->type == NL80211_IFTYPE_P2P_GO))
 483                 common->p2p_enabled = true;
 484
 485         /* Get free vap index */
 486         for (i = 0; i < RSI_MAX_VIFS; i++) {
 487                 if (!adapter->vifs[i] ||
 488                     !memcmp(vif->addr, adapter->vifs[i]->addr, ETH_ALEN)) {
 489                         vap_idx = i;
 490                         break;
 491                 }
 492         }
 493         if (vap_idx < 0) {
 494                 rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
 495                 mutex_unlock(&common->mutex);
 496                 return -EOPNOTSUPP;
 497         }
 498         vif_info->vap_id = vap_idx;
 499         adapter->vifs[vap_idx] = vif;
 500         adapter->sc_nvifs++;
 501         vap_status = VAP_ADD;
 502
 503         if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
 504                                      vif_info->vap_id, vap_status)) {
 505                 rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
 506                 mutex_unlock(&common->mutex);
 507                 return -EINVAL;
 508         }
 509
 510         if ((vif->type == NL80211_IFTYPE_AP) ||
 511             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 512                 rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
 513                 for (i = 0; i < common->max_stations; i++)
 514                         common->stations[i].sta = NULL;
 515         }
 516
 517         mutex_unlock(&common->mutex);
 518
 519         return 0;
 520 }
 521
 522 /**
 523  * rsi_mac80211_remove_interface() - This function notifies driver that an
 524  *                                   interface is going down.
 525  * @hw: Pointer to the ieee80211_hw structure.
 526  * @vif: Pointer to the ieee80211_vif structure.
 527  *
 528  * Return: None.
 529  */
 530 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
 531                                           struct ieee80211_vif *vif)
 532 {
 533         struct rsi_hw *adapter = hw->priv;
 534         struct rsi_common *common = adapter->priv;
 535         enum opmode opmode;
 536         int i;
 537
 538         rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
 539
 540         mutex_lock(&common->mutex);
 541
 542         if (adapter->sc_nvifs <= 0) {
 543                 mutex_unlock(&common->mutex);
 544                 return;
 545         }
 546
 547         opmode = rsi_map_intf_mode(vif->type);
 548         if (opmode == RSI_OPMODE_UNSUPPORTED) {
 549                 rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
 550                 mutex_unlock(&common->mutex);
 551                 return;
 552         }
 553         for (i = 0; i < RSI_MAX_VIFS; i++) {
 554                 if (!adapter->vifs[i])
 555                         continue;
 556                 if (vif == adapter->vifs[i]) {
 557                         rsi_set_vap_capabilities(common, opmode, vif->addr,
 558                                                  i, VAP_DELETE);
 559                         adapter->sc_nvifs--;
 560                         adapter->vifs[i] = NULL;
 561                 }
 562         }
 563         mutex_unlock(&common->mutex);
 564 }
 565
 566 /**
 567  * rsi_channel_change() - This function is a performs the checks
 568  *                        required for changing a channel and sets
 569  *                        the channel accordingly.
 570  * @hw: Pointer to the ieee80211_hw structure.
 571  *
 572  * Return: 0 on success, negative error code on failure.
 573  */
 574 static int rsi_channel_change(struct ieee80211_hw *hw)
 575 {
 576         struct rsi_hw *adapter = hw->priv;
 577         struct rsi_common *common = adapter->priv;
 578         int status = -EOPNOTSUPP;
 579         struct ieee80211_channel *curchan = hw->conf.chandef.chan;
 580         u16 channel = curchan->hw_value;
 581         struct ieee80211_vif *vif;
 582         bool assoc = false;
 583         int i;
 584
 585         rsi_dbg(INFO_ZONE,
 586                 "%s: Set channel: %d MHz type: %d channel_no %d\n",
 587                 __func__, curchan->center_freq,
 588                 curchan->flags, channel);
 589
 590         for (i = 0; i < RSI_MAX_VIFS; i++) {
 591                 vif = adapter->vifs[i];
 592                 if (!vif)
 593                         continue;
 594                 if (vif->type == NL80211_IFTYPE_STATION) {
 595                         if (vif->cfg.assoc) {
 596                                 assoc = true;
 597                                 break;
 598                         }
 599                 }
 600         }
 601         if (assoc) {
 602                 if (!common->hw_data_qs_blocked &&
 603                     (rsi_get_connected_channel(vif) != channel)) {
 604                         rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
 605                         if (!rsi_send_block_unblock_frame(common, true))
 606                                 common->hw_data_qs_blocked = true;
 607                 }
 608         }
 609
 610         status = rsi_band_check(common, curchan);
 611         if (!status)
 612                 status = rsi_set_channel(adapter->priv, curchan);
 613
 614         if (assoc) {
 615                 if (common->hw_data_qs_blocked &&
 616                     (rsi_get_connected_channel(vif) == channel)) {
 617                         rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 618                         if (!rsi_send_block_unblock_frame(common, false))
 619                                 common->hw_data_qs_blocked = false;
 620                 }
 621         }
 622
 623         return status;
 624 }
 625
 626 /**
 627  * rsi_config_power() - This function configures tx power to device
 628  * @hw: Pointer to the ieee80211_hw structure.
 629  *
 630  * Return: 0 on success, negative error code on failure.
 631  */
 632 static int rsi_config_power(struct ieee80211_hw *hw)
 633 {
 634         struct rsi_hw *adapter = hw->priv;
 635         struct rsi_common *common = adapter->priv;
 636         struct ieee80211_conf *conf = &hw->conf;
 637
 638         if (adapter->sc_nvifs <= 0) {
 639                 rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
 640                 return -EINVAL;
 641         }
 642
 643         rsi_dbg(INFO_ZONE,
 644                 "%s: Set tx power: %d dBM\n", __func__, conf->power_level);
 645
 646         if (conf->power_level == common->tx_power)
 647                 return 0;
 648
 649         common->tx_power = conf->power_level;
 650
 651         return rsi_send_radio_params_update(common);
 652 }
 653
 654 /**
 655  * rsi_mac80211_config() - This function is a handler for configuration
 656  *                         requests. The stack calls this function to
 657  *                         change hardware configuration, e.g., channel.
 658  * @hw: Pointer to the ieee80211_hw structure.
 659  * @changed: Changed flags set.
 660  *
 661  * Return: 0 on success, negative error code on failure.
 662  */
 663 static int rsi_mac80211_config(struct ieee80211_hw *hw,
 664                                u32 changed)
 665 {
 666         struct rsi_hw *adapter = hw->priv;
 667         struct rsi_common *common = adapter->priv;
 668         struct ieee80211_conf *conf = &hw->conf;
 669         int status = -EOPNOTSUPP;
 670
 671         mutex_lock(&common->mutex);
 672
 673         if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
 674                 status = rsi_channel_change(hw);
 675
 676         /* tx power */
 677         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 678                 rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
 679                 status = rsi_config_power(hw);
 680         }
 681
 682         /* Power save parameters */
 683         if ((changed & IEEE80211_CONF_CHANGE_PS) &&
 684             !common->mac_ops_resumed) {
 685                 struct ieee80211_vif *vif, *sta_vif = NULL;
 686                 unsigned long flags;
 687                 int i, set_ps = 1;
 688
 689                 for (i = 0; i < RSI_MAX_VIFS; i++) {
 690                         vif = adapter->vifs[i];
 691                         if (!vif)
 692                                 continue;
 693                         /* Don't go to power save if AP vap exists */
 694                         if ((vif->type == NL80211_IFTYPE_AP) ||
 695                             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 696                                 set_ps = 0;
 697                                 break;
 698                         }
 699                         if ((vif->type == NL80211_IFTYPE_STATION ||
 700                              vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
 701                             (!sta_vif || vif->cfg.assoc))
 702                                 sta_vif = vif;
 703                 }
 704                 if (set_ps && sta_vif) {
 705                         spin_lock_irqsave(&adapter->ps_lock, flags);
 706                         if (conf->flags & IEEE80211_CONF_PS)
 707                                 rsi_enable_ps(adapter, sta_vif);
 708                         else
 709                                 rsi_disable_ps(adapter, sta_vif);
 710                         spin_unlock_irqrestore(&adapter->ps_lock, flags);
 711                 }
 712         }
 713
 714         /* RTS threshold */
 715         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 716                 rsi_dbg(INFO_ZONE, "RTS threshold\n");
 717                 if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
 718                         rsi_dbg(INFO_ZONE,
 719                                 "%s: Sending vap updates....\n", __func__);
 720                         status = rsi_send_vap_dynamic_update(common);
 721                 }
 722         }
 723         mutex_unlock(&common->mutex);
 724
 725         return status;
 726 }
 727
 728 /**
 729  * rsi_get_connected_channel() - This function is used to get the current
 730  *                               connected channel number.
 731  * @vif: Pointer to the ieee80211_vif structure.
 732  *
 733  * Return: Current connected AP's channel number is returned.
 734  */
 735 u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
 736 {
 737         struct ieee80211_bss_conf *bss;
 738         struct ieee80211_channel *channel;
 739
 740         if (!vif)
 741                 return 0;
 742
 743         bss = &vif->bss_conf;
 744         channel = bss->chanreq.oper.chan;
 745
 746         if (!channel)
 747                 return 0;
 748
 749         return channel->hw_value;
 750 }
 751
 752 static void rsi_switch_channel(struct rsi_hw *adapter,
 753                                struct ieee80211_vif *vif)
 754 {
 755         struct rsi_common *common = adapter->priv;
 756         struct ieee80211_channel *channel;
 757
 758         if (common->iface_down)
 759                 return;
 760         if (!vif)
 761                 return;
 762
 763         channel = vif->bss_conf.chanreq.oper.chan;
 764
 765         if (!channel)
 766                 return;
 767
 768         rsi_band_check(common, channel);
 769         rsi_set_channel(common, channel);
 770         rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
 771 }
 772
 773 /**
 774  * rsi_mac80211_bss_info_changed() - This function is a handler for config
 775  *                                   requests related to BSS parameters that
 776  *                                   may vary during BSS's lifespan.
 777  * @hw: Pointer to the ieee80211_hw structure.
 778  * @vif: Pointer to the ieee80211_vif structure.
 779  * @bss_conf: Pointer to the ieee80211_bss_conf structure.
 780  * @changed: Changed flags set.
 781  *
 782  * Return: None.
 783  */
 784 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 785                                           struct ieee80211_vif *vif,
 786                                           struct ieee80211_bss_conf *bss_conf,
 787                                           u64 changed)
 788 {
 789         struct rsi_hw *adapter = hw->priv;
 790         struct rsi_common *common = adapter->priv;
 791         struct ieee80211_bss_conf *bss = &vif->bss_conf;
 792         struct ieee80211_conf *conf = &hw->conf;
 793         u16 rx_filter_word = 0;
 794
 795         mutex_lock(&common->mutex);
 796         if (changed & BSS_CHANGED_ASSOC) {
 797                 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
 798                         __func__, vif->cfg.assoc);
 799                 if (vif->cfg.assoc) {
 800                         /* Send the RX filter frame */
 801                         rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
 802                                           ALLOW_CTRL_ASSOC_PEER |
 803                                           ALLOW_MGMT_ASSOC_PEER);
 804                         rsi_send_rx_filter_frame(common, rx_filter_word);
 805                 }
 806                 rsi_inform_bss_status(common,
 807                                       RSI_OPMODE_STA,
 808                                       vif->cfg.assoc,
 809                                       bss_conf->bssid,
 810                                       bss_conf->qos,
 811                                       vif->cfg.aid,
 812                                       NULL, 0,
 813                                       bss_conf->assoc_capability, vif);
 814                 adapter->ps_info.dtim_interval_duration = bss->dtim_period;
 815                 adapter->ps_info.listen_interval = conf->listen_interval;
 816
 817                 /* If U-APSD is updated, send ps parameters to firmware */
 818                 if (vif->cfg.assoc) {
 819                         if (common->uapsd_bitmap) {
 820                                 rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
 821                                 rsi_conf_uapsd(adapter, vif);
 822                         }
 823                 } else {
 824                         common->uapsd_bitmap = 0;
 825                 }
 826         }
 827
 828         if (changed & BSS_CHANGED_CQM) {
 829                 common->cqm_info.last_cqm_event_rssi = 0;
 830                 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
 831                 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
 832                 rsi_dbg(INFO_ZONE, "RSSI threshold & hysteresis are: %d %d\n",
 833                         common->cqm_info.rssi_thold,
 834                         common->cqm_info.rssi_hyst);
 835         }
 836
 837         if (changed & BSS_CHANGED_BEACON_INT) {
 838                 rsi_dbg(INFO_ZONE, "%s: Changed Beacon interval: %d\n",
 839                         __func__, bss_conf->beacon_int);
 840                 if (common->beacon_interval != bss->beacon_int) {
 841                         common->beacon_interval = bss->beacon_int;
 842                         if (vif->type == NL80211_IFTYPE_AP) {
 843                                 struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 844
 845                                 rsi_set_vap_capabilities(common, RSI_OPMODE_AP,
 846                                                          vif->addr, vif_info->vap_id,
 847                                                          VAP_UPDATE);
 848                         }
 849                 }
 850                 adapter->ps_info.listen_interval =
 851                         bss->beacon_int * adapter->ps_info.num_bcns_per_lis_int;
 852         }
 853
 854         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
 855             ((vif->type == NL80211_IFTYPE_AP) ||
 856              (vif->type == NL80211_IFTYPE_P2P_GO))) {
 857                 if (bss->enable_beacon) {
 858                         rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
 859                         common->beacon_enabled = 1;
 860                 } else {
 861                         rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
 862                         common->beacon_enabled = 0;
 863                 }
 864         }
 865
 866         mutex_unlock(&common->mutex);
 867 }
 868
 869 /**
 870  * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
 871  * @hw: Pointer to the ieee80211_hw structure.
 872  * @changed_flags: Changed flags set.
 873  * @total_flags: Total initial flags set.
 874  * @multicast: Multicast.
 875  *
 876  * Return: None.
 877  */
 878 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
 879                                      u32 changed_flags,
 880                                      u32 *total_flags,
 881                                      u64 multicast)
 882 {
 883         /* Not doing much here as of now */
 884         *total_flags &= RSI_SUPP_FILTERS;
 885 }
 886
 887 /**
 888  * rsi_mac80211_conf_tx() - This function configures TX queue parameters
 889  *                          (EDCF (aifs, cw_min, cw_max), bursting)
 890  *                          for a hardware TX queue.
 891  * @hw: Pointer to the ieee80211_hw structure
 892  * @vif: Pointer to the ieee80211_vif structure.
 893  * @link_id: the link ID if MLO is used, otherwise 0
 894  * @queue: Queue number.
 895  * @params: Pointer to ieee80211_tx_queue_params structure.
 896  *
 897  * Return: 0 on success, negative error code on failure.
 898  */
 899 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
 900                                 struct ieee80211_vif *vif,
 901                                 unsigned int link_id, u16 queue,
 902                                 const struct ieee80211_tx_queue_params *params)
 903 {
 904         struct rsi_hw *adapter = hw->priv;
 905         struct rsi_common *common = adapter->priv;
 906         u8 idx = 0;
 907
 908         if (queue >= IEEE80211_NUM_ACS)
 909                 return 0;
 910
 911         rsi_dbg(INFO_ZONE,
 912                 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
 913                 __func__, queue, params->aifs,
 914                 params->cw_min, params->cw_max, params->txop);
 915
 916         mutex_lock(&common->mutex);
 917         /* Map into the way the f/w expects */
 918         switch (queue) {
 919         case IEEE80211_AC_VO:
 920                 idx = VO_Q;
 921                 break;
 922         case IEEE80211_AC_VI:
 923                 idx = VI_Q;
 924                 break;
 925         case IEEE80211_AC_BE:
 926                 idx = BE_Q;
 927                 break;
 928         case IEEE80211_AC_BK:
 929                 idx = BK_Q;
 930                 break;
 931         default:
 932                 idx = BE_Q;
 933                 break;
 934         }
 935
 936         memcpy(&common->edca_params[idx],
 937                params,
 938                sizeof(struct ieee80211_tx_queue_params));
 939
 940         if (params->uapsd)
 941                 common->uapsd_bitmap |= idx;
 942         else
 943                 common->uapsd_bitmap &= (~idx);
 944
 945         mutex_unlock(&common->mutex);
 946
 947         return 0;
 948 }
 949
 950 /**
 951  * rsi_hal_key_config() - This function loads the keys into the firmware.
 952  * @hw: Pointer to the ieee80211_hw structure.
 953  * @vif: Pointer to the ieee80211_vif structure.
 954  * @key: Pointer to the ieee80211_key_conf structure.
 955  * @sta: Pointer to the ieee80211_sta structure.
 956  *
 957  * Return: status: 0 on success, negative error codes on failure.
 958  */
 959 static int rsi_hal_key_config(struct ieee80211_hw *hw,
 960                               struct ieee80211_vif *vif,
 961                               struct ieee80211_key_conf *key,
 962                               struct ieee80211_sta *sta)
 963 {
 964         struct rsi_hw *adapter = hw->priv;
 965         struct rsi_sta *rsta = NULL;
 966         int status;
 967         u8 key_type;
 968         s16 sta_id = 0;
 969
 970         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 971                 key_type = RSI_PAIRWISE_KEY;
 972         else
 973                 key_type = RSI_GROUP_KEY;
 974
 975         rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
 976                 __func__, key->cipher, key_type, key->keylen);
 977
 978         if ((vif->type == NL80211_IFTYPE_AP) ||
 979             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 980                 if (sta) {
 981                         rsta = rsi_find_sta(adapter->priv, sta->addr);
 982                         if (rsta)
 983                                 sta_id = rsta->sta_id;
 984                 }
 985                 adapter->priv->key = key;
 986         } else {
 987                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
 988                     (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 989                         status = rsi_hal_load_key(adapter->priv,
 990                                                   key->key,
 991                                                   key->keylen,
 992                                                   RSI_PAIRWISE_KEY,
 993                                                   key->keyidx,
 994                                                   key->cipher,
 995                                                   sta_id,
 996                                                   vif);
 997                         if (status)
 998                                 return status;
 999                 }
1000         }
1001
1002         status = rsi_hal_load_key(adapter->priv,
1003                                   key->key,
1004                                   key->keylen,
1005                                   key_type,
1006                                   key->keyidx,
1007                                   key->cipher,
1008                                   sta_id,
1009                                   vif);
1010         if (status)
1011                 return status;
1012
1013         if (vif->type == NL80211_IFTYPE_STATION &&
1014             (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
1015              key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
1016                 if (!rsi_send_block_unblock_frame(adapter->priv, false))
1017                         adapter->priv->hw_data_qs_blocked = false;
1018         }
1019
1020         return 0;
1021 }
1022
1023 /**
1024  * rsi_mac80211_set_key() - This function sets type of key to be loaded.
1025  * @hw: Pointer to the ieee80211_hw structure.
1026  * @cmd: enum set_key_cmd.
1027  * @vif: Pointer to the ieee80211_vif structure.
1028  * @sta: Pointer to the ieee80211_sta structure.
1029  * @key: Pointer to the ieee80211_key_conf structure.
1030  *
1031  * Return: status: 0 on success, negative error code on failure.
1032  */
1033 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
1034                                 enum set_key_cmd cmd,
1035                                 struct ieee80211_vif *vif,
1036                                 struct ieee80211_sta *sta,
1037                                 struct ieee80211_key_conf *key)
1038 {
1039         struct rsi_hw *adapter = hw->priv;
1040         struct rsi_common *common = adapter->priv;
1041         struct security_info *secinfo = &common->secinfo;
1042         int status;
1043
1044         mutex_lock(&common->mutex);
1045         switch (cmd) {
1046         case SET_KEY:
1047                 status = rsi_hal_key_config(hw, vif, key, sta);
1048                 if (status) {
1049                         mutex_unlock(&common->mutex);
1050                         return status;
1051                 }
1052
1053                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
1054                         secinfo->ptk_cipher = key->cipher;
1055                 else
1056                         secinfo->gtk_cipher = key->cipher;
1057
1058                 key->hw_key_idx = key->keyidx;
1059                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1060
1061                 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
1062                 break;
1063
1064         case DISABLE_KEY:
1065                 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
1066                 memset(key, 0, sizeof(struct ieee80211_key_conf));
1067                 status = rsi_hal_key_config(hw, vif, key, sta);
1068                 break;
1069
1070         default:
1071                 status = -EOPNOTSUPP;
1072                 break;
1073         }
1074
1075         mutex_unlock(&common->mutex);
1076         return status;
1077 }
1078
1079 /**
1080  * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
1081  *                               the corresponding mlme_action flag and
1082  *                               informs the f/w regarding this.
1083  * @hw: Pointer to the ieee80211_hw structure.
1084  * @vif: Pointer to the ieee80211_vif structure.
1085  * @params: Pointer to A-MPDU action parameters
1086  *
1087  * Return: status: 0 on success, negative error code on failure.
1088  */
1089 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1090                                      struct ieee80211_vif *vif,
1091                                      struct ieee80211_ampdu_params *params)
1092 {
1093         int status = -EOPNOTSUPP;
1094         struct rsi_hw *adapter = hw->priv;
1095         struct rsi_common *common = adapter->priv;
1096         struct rsi_sta *rsta = NULL;
1097         u16 seq_no = 0, seq_start = 0;
1098         u8 ii = 0;
1099         struct ieee80211_sta *sta = params->sta;
1100         u8 sta_id = 0;
1101         enum ieee80211_ampdu_mlme_action action = params->action;
1102         u16 tid = params->tid;
1103         u16 *ssn = &params->ssn;
1104         u8 buf_size = params->buf_size;
1105
1106         for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1107                 if (vif == adapter->vifs[ii])
1108                         break;
1109         }
1110
1111         if (ii >= RSI_MAX_VIFS)
1112                 return status;
1113
1114         mutex_lock(&common->mutex);
1115
1116         if (ssn != NULL)
1117                 seq_no = *ssn;
1118
1119         if ((vif->type == NL80211_IFTYPE_AP) ||
1120             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1121                 rsta = rsi_find_sta(common, sta->addr);
1122                 if (!rsta) {
1123                         rsi_dbg(ERR_ZONE, "No station mapped\n");
1124                         status = 0;
1125                         goto unlock;
1126                 }
1127                 sta_id = rsta->sta_id;
1128         }
1129
1130         rsi_dbg(INFO_ZONE,
1131                 "%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1132                 __func__, tid, seq_no, buf_size, sta_id);
1133
1134         switch (action) {
1135         case IEEE80211_AMPDU_RX_START:
1136                 status = rsi_send_aggregation_params_frame(common,
1137                                                            tid,
1138                                                            seq_no,
1139                                                            buf_size,
1140                                                            STA_RX_ADDBA_DONE,
1141                                                            sta_id);
1142                 break;
1143
1144         case IEEE80211_AMPDU_RX_STOP:
1145                 status = rsi_send_aggregation_params_frame(common,
1146                                                            tid,
1147                                                            0,
1148                                                            buf_size,
1149                                                            STA_RX_DELBA,
1150                                                            sta_id);
1151                 break;
1152
1153         case IEEE80211_AMPDU_TX_START:
1154                 if ((vif->type == NL80211_IFTYPE_STATION) ||
1155                     (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1156                         common->vif_info[ii].seq_start = seq_no;
1157                 else if ((vif->type == NL80211_IFTYPE_AP) ||
1158                          (vif->type == NL80211_IFTYPE_P2P_GO))
1159                         rsta->seq_start[tid] = seq_no;
1160                 status = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1161                 break;
1162
1163         case IEEE80211_AMPDU_TX_STOP_CONT:
1164         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1165         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1166                 status = rsi_send_aggregation_params_frame(common,
1167                                                            tid,
1168                                                            seq_no,
1169                                                            buf_size,
1170                                                            STA_TX_DELBA,
1171                                                            sta_id);
1172                 if (!status)
1173                         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1174                 break;
1175
1176         case IEEE80211_AMPDU_TX_OPERATIONAL:
1177                 if ((vif->type == NL80211_IFTYPE_STATION) ||
1178                     (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1179                         seq_start = common->vif_info[ii].seq_start;
1180                 else if ((vif->type == NL80211_IFTYPE_AP) ||
1181                          (vif->type == NL80211_IFTYPE_P2P_GO))
1182                         seq_start = rsta->seq_start[tid];
1183                 status = rsi_send_aggregation_params_frame(common,
1184                                                            tid,
1185                                                            seq_start,
1186                                                            buf_size,
1187                                                            STA_TX_ADDBA_DONE,
1188                                                            sta_id);
1189                 break;
1190
1191         default:
1192                 rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1193                 break;
1194         }
1195
1196 unlock:
1197         mutex_unlock(&common->mutex);
1198         return status;
1199 }
1200
1201 /**
1202  * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1203  * @hw: Pointer to the ieee80211_hw structure.
1204  * @value: Rts threshold value.
1205  *
1206  * Return: 0 on success.
1207  */
1208 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1209                                           u32 value)
1210 {
1211         struct rsi_hw *adapter = hw->priv;
1212         struct rsi_common *common = adapter->priv;
1213
1214         mutex_lock(&common->mutex);
1215         common->rts_threshold = value;
1216         mutex_unlock(&common->mutex);
1217
1218         return 0;
1219 }
1220
1221 /**
1222  * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1223  * @hw: Pointer to the ieee80211_hw structure
1224  * @vif: Pointer to the ieee80211_vif structure.
1225  * @mask: Pointer to the cfg80211_bitrate_mask structure.
1226  *
1227  * Return: 0 on success.
1228  */
1229 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1230                                       struct ieee80211_vif *vif,
1231                                       const struct cfg80211_bitrate_mask *mask)
1232 {
1233         const unsigned int mcs_offset = ARRAY_SIZE(rsi_rates);
1234         struct rsi_hw *adapter = hw->priv;
1235         struct rsi_common *common = adapter->priv;
1236         int i;
1237
1238         mutex_lock(&common->mutex);
1239
1240         for (i = 0; i < ARRAY_SIZE(common->rate_config); i++) {
1241                 struct rsi_rate_config *cfg = &common->rate_config[i];
1242                 u32 bm;
1243
1244                 bm = mask->control[i].legacy | (mask->control[i].ht_mcs[0] << mcs_offset);
1245                 if (hweight32(bm) == 1) { /* single rate */
1246                         int rate_index = ffs(bm) - 1;
1247
1248                         if (rate_index < mcs_offset)
1249                                 cfg->fixed_hw_rate = rsi_rates[rate_index].hw_value;
1250                         else
1251                                 cfg->fixed_hw_rate = rsi_mcsrates[rate_index - mcs_offset];
1252                         cfg->fixed_enabled = true;
1253                 } else {
1254                         cfg->configured_mask = bm;
1255                         cfg->fixed_enabled = false;
1256                 }
1257         }
1258
1259         mutex_unlock(&common->mutex);
1260
1261         return 0;
1262 }
1263
1264 /**
1265  * rsi_perform_cqm() - This function performs cqm.
1266  * @common: Pointer to the driver private structure.
1267  * @bssid: pointer to the bssid.
1268  * @rssi: RSSI value.
1269  * @vif: Pointer to the ieee80211_vif structure.
1270  */
1271 static void rsi_perform_cqm(struct rsi_common *common,
1272                             u8 *bssid,
1273                             s8 rssi,
1274                             struct ieee80211_vif *vif)
1275 {
1276         s8 last_event = common->cqm_info.last_cqm_event_rssi;
1277         int thold = common->cqm_info.rssi_thold;
1278         u32 hyst = common->cqm_info.rssi_hyst;
1279         enum nl80211_cqm_rssi_threshold_event event;
1280
1281         if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1282                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1283         else if (rssi > thold &&
1284                  (last_event == 0 || rssi > (last_event + hyst)))
1285                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1286         else
1287                 return;
1288
1289         common->cqm_info.last_cqm_event_rssi = rssi;
1290         rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1291         ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1292
1293         return;
1294 }
1295
1296 /**
1297  * rsi_fill_rx_status() - This function fills rx status in
1298  *                        ieee80211_rx_status structure.
1299  * @hw: Pointer to the ieee80211_hw structure.
1300  * @skb: Pointer to the socket buffer structure.
1301  * @common: Pointer to the driver private structure.
1302  * @rxs: Pointer to the ieee80211_rx_status structure.
1303  *
1304  * Return: None.
1305  */
1306 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1307                                struct sk_buff *skb,
1308                                struct rsi_common *common,
1309                                struct ieee80211_rx_status *rxs)
1310 {
1311         struct rsi_hw *adapter = common->priv;
1312         struct ieee80211_vif *vif;
1313         struct ieee80211_bss_conf *bss = NULL;
1314         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1315         struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1316         struct ieee80211_hdr *hdr;
1317         char rssi = rx_params->rssi;
1318         u8 hdrlen = 0;
1319         u8 channel = rx_params->channel;
1320         s32 freq;
1321         int i;
1322
1323         hdr = ((struct ieee80211_hdr *)(skb->data));
1324         hdrlen = ieee80211_hdrlen(hdr->frame_control);
1325
1326         memset(info, 0, sizeof(struct ieee80211_tx_info));
1327
1328         rxs->signal = -(rssi);
1329
1330         rxs->band = common->band;
1331
1332         freq = ieee80211_channel_to_frequency(channel, rxs->band);
1333
1334         if (freq)
1335                 rxs->freq = freq;
1336
1337         if (ieee80211_has_protected(hdr->frame_control)) {
1338                 if (rsi_is_cipher_wep(common)) {
1339                         memmove(skb->data + 4, skb->data, hdrlen);
1340                         skb_pull(skb, 4);
1341                 } else {
1342                         memmove(skb->data + 8, skb->data, hdrlen);
1343                         skb_pull(skb, 8);
1344                         rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1345                 }
1346                 rxs->flag |= RX_FLAG_DECRYPTED;
1347                 rxs->flag |= RX_FLAG_IV_STRIPPED;
1348         }
1349
1350         for (i = 0; i < RSI_MAX_VIFS; i++) {
1351                 vif = adapter->vifs[i];
1352                 if (!vif)
1353                         continue;
1354                 if (vif->type == NL80211_IFTYPE_STATION) {
1355                         bss = &vif->bss_conf;
1356                         break;
1357                 }
1358         }
1359         if (!bss)
1360                 return;
1361         /* CQM only for connected AP beacons, the RSSI is a weighted avg */
1362         if (vif->cfg.assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1363                 if (ieee80211_is_beacon(hdr->frame_control))
1364                         rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1365         }
1366
1367         return;
1368 }
1369
1370 /**
1371  * rsi_indicate_pkt_to_os() - This function sends received packet to mac80211.
1372  * @common: Pointer to the driver private structure.
1373  * @skb: Pointer to the socket buffer structure.
1374  *
1375  * Return: None.
1376  */
1377 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1378                             struct sk_buff *skb)
1379 {
1380         struct rsi_hw *adapter = common->priv;
1381         struct ieee80211_hw *hw = adapter->hw;
1382         struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1383
1384         if ((common->iface_down) || (!adapter->sc_nvifs)) {
1385                 dev_kfree_skb(skb);
1386                 return;
1387         }
1388
1389         /* filling in the ieee80211_rx_status flags */
1390         rsi_fill_rx_status(hw, skb, common, rx_status);
1391
1392         ieee80211_rx_irqsafe(hw, skb);
1393 }
1394
1395 /**
1396  * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1397  *                          connected.
1398  * @hw: pointer to the ieee80211_hw structure.
1399  * @vif: Pointer to the ieee80211_vif structure.
1400  * @sta: Pointer to the ieee80211_sta structure.
1401  *
1402  * Return: 0 on success, negative error codes on failure.
1403  */
1404 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1405                                 struct ieee80211_vif *vif,
1406                                 struct ieee80211_sta *sta)
1407 {
1408         struct rsi_hw *adapter = hw->priv;
1409         struct rsi_common *common = adapter->priv;
1410         bool sta_exist = false;
1411         struct rsi_sta *rsta;
1412         int status = 0;
1413
1414         rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1415
1416         mutex_lock(&common->mutex);
1417
1418         if ((vif->type == NL80211_IFTYPE_AP) ||
1419             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1420                 u8 cnt;
1421                 int sta_idx = -1;
1422                 int free_index = -1;
1423
1424                 /* Check if max stations reached */
1425                 if (common->num_stations >= common->max_stations) {
1426                         rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1427                         status = -EOPNOTSUPP;
1428                         goto unlock;
1429                 }
1430                 for (cnt = 0; cnt < common->max_stations; cnt++) {
1431                         rsta = &common->stations[cnt];
1432
1433                         if (!rsta->sta) {
1434                                 if (free_index < 0)
1435                                         free_index = cnt;
1436                                 continue;
1437                         }
1438                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1439                                 rsi_dbg(INFO_ZONE, "Station exists\n");
1440                                 sta_idx = cnt;
1441                                 sta_exist = true;
1442                                 break;
1443                         }
1444                 }
1445                 if (!sta_exist) {
1446                         if (free_index >= 0)
1447                                 sta_idx = free_index;
1448                 }
1449                 if (sta_idx < 0) {
1450                         rsi_dbg(ERR_ZONE,
1451                                 "%s: Some problem reaching here...\n",
1452                                 __func__);
1453                         status = -EINVAL;
1454                         goto unlock;
1455                 }
1456                 rsta = &common->stations[sta_idx];
1457                 rsta->sta = sta;
1458                 rsta->sta_id = sta_idx;
1459                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1460                         rsta->start_tx_aggr[cnt] = false;
1461                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1462                         rsta->seq_start[cnt] = 0;
1463                 if (!sta_exist) {
1464                         rsi_dbg(INFO_ZONE, "New Station\n");
1465
1466                         /* Send peer notify to device */
1467                         rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1468                         rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1469                                               sta->addr, sta->wme, sta->aid,
1470                                               sta, sta_idx, 0, vif);
1471
1472                         if (common->key) {
1473                                 struct ieee80211_key_conf *key = common->key;
1474
1475                                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1476                                     (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1477                                         rsi_hal_load_key(adapter->priv,
1478                                                          key->key,
1479                                                          key->keylen,
1480                                                          RSI_PAIRWISE_KEY,
1481                                                          key->keyidx,
1482                                                          key->cipher,
1483                                                          sta_idx,
1484                                                          vif);
1485                         }
1486
1487                         common->num_stations++;
1488                 }
1489         }
1490
1491         if ((vif->type == NL80211_IFTYPE_STATION) ||
1492             (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1493                 common->bitrate_mask[common->band] = sta->deflink.supp_rates[common->band];
1494                 common->vif_info[0].is_ht = sta->deflink.ht_cap.ht_supported;
1495                 if (sta->deflink.ht_cap.ht_supported) {
1496                         common->bitrate_mask[NL80211_BAND_2GHZ] =
1497                                         sta->deflink.supp_rates[NL80211_BAND_2GHZ];
1498                         if ((sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1499                             (sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1500                                 common->vif_info[0].sgi = true;
1501                         ieee80211_start_tx_ba_session(sta, 0, 0);
1502                 }
1503         }
1504
1505 unlock:
1506         mutex_unlock(&common->mutex);
1507
1508         return status;
1509 }
1510
1511 /**
1512  * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1513  *                             getting disconnected.
1514  * @hw: Pointer to the ieee80211_hw structure.
1515  * @vif: Pointer to the ieee80211_vif structure.
1516  * @sta: Pointer to the ieee80211_sta structure.
1517  *
1518  * Return: 0 on success, negative error codes on failure.
1519  */
1520 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1521                                    struct ieee80211_vif *vif,
1522                                    struct ieee80211_sta *sta)
1523 {
1524         struct rsi_hw *adapter = hw->priv;
1525         struct rsi_common *common = adapter->priv;
1526         struct ieee80211_bss_conf *bss = &vif->bss_conf;
1527         struct rsi_sta *rsta;
1528
1529         rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1530
1531         mutex_lock(&common->mutex);
1532
1533         if ((vif->type == NL80211_IFTYPE_AP) ||
1534             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1535                 u8 sta_idx, cnt;
1536
1537                 /* Send peer notify to device */
1538                 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1539                 for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1540                         rsta = &common->stations[sta_idx];
1541
1542                         if (!rsta->sta)
1543                                 continue;
1544                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1545                                 rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1546                                                       sta->addr, sta->wme,
1547                                                       sta->aid, sta, sta_idx,
1548                                                       0, vif);
1549                                 rsta->sta = NULL;
1550                                 rsta->sta_id = -1;
1551                                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1552                                         rsta->start_tx_aggr[cnt] = false;
1553                                 if (common->num_stations > 0)
1554                                         common->num_stations--;
1555                                 break;
1556                         }
1557                 }
1558                 if (sta_idx >= common->max_stations)
1559                         rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1560         }
1561
1562         if ((vif->type == NL80211_IFTYPE_STATION) ||
1563             (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1564                 /* Resetting all the fields to default values */
1565                 memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1566                 bss->qos = sta->wme;
1567                 common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1568                 common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1569                 common->vif_info[0].is_ht = false;
1570                 common->vif_info[0].sgi = false;
1571                 common->vif_info[0].seq_start = 0;
1572                 common->secinfo.ptk_cipher = 0;
1573                 common->secinfo.gtk_cipher = 0;
1574                 if (!common->iface_down)
1575                         rsi_send_rx_filter_frame(common, 0);
1576         }
1577         mutex_unlock(&common->mutex);
1578
1579         return 0;
1580 }
1581
1582 /**
1583  * rsi_mac80211_set_antenna() - This function is used to configure
1584  *                              tx and rx antennas.
1585  * @hw: Pointer to the ieee80211_hw structure.
1586  * @tx_ant: Bitmap for tx antenna
1587  * @rx_ant: Bitmap for rx antenna
1588  *
1589  * Return: 0 on success, Negative error code on failure.
1590  */
1591 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1592                                     u32 tx_ant, u32 rx_ant)
1593 {
1594         struct rsi_hw *adapter = hw->priv;
1595         struct rsi_common *common = adapter->priv;
1596         u8 antenna = 0;
1597
1598         if (tx_ant > 1 || rx_ant > 1) {
1599                 rsi_dbg(ERR_ZONE,
1600                         "Invalid antenna selection (tx: %d, rx:%d)\n",
1601                         tx_ant, rx_ant);
1602                 rsi_dbg(ERR_ZONE,
1603                         "Use 0 for int_ant, 1 for ext_ant\n");
1604                 return -EINVAL;
1605         }
1606
1607         rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1608                         __func__, tx_ant, rx_ant);
1609
1610         mutex_lock(&common->mutex);
1611
1612         antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1613         if (common->ant_in_use != antenna)
1614                 if (rsi_set_antenna(common, antenna))
1615                         goto fail_set_antenna;
1616
1617         rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1618                 tx_ant ? "UFL" : "INT");
1619
1620         common->ant_in_use = antenna;
1621
1622         mutex_unlock(&common->mutex);
1623
1624         return 0;
1625
1626 fail_set_antenna:
1627         rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1628         mutex_unlock(&common->mutex);
1629         return -EINVAL;
1630 }
1631
1632 /**
1633  * rsi_mac80211_get_antenna() - This function is used to configure
1634  *                              tx and rx antennas.
1635  *
1636  * @hw: Pointer to the ieee80211_hw structure.
1637  * @tx_ant: Bitmap for tx antenna
1638  * @rx_ant: Bitmap for rx antenna
1639  *
1640  * Return: 0 on success, negative error codes on failure.
1641  */
1642 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1643                                     u32 *tx_ant, u32 *rx_ant)
1644 {
1645         struct rsi_hw *adapter = hw->priv;
1646         struct rsi_common *common = adapter->priv;
1647
1648         mutex_lock(&common->mutex);
1649
1650         *tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1651         *rx_ant = 0;
1652
1653         mutex_unlock(&common->mutex);
1654
1655         return 0;
1656 }
1657
1658 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1659 {
1660         switch (region_code) {
1661         case NL80211_DFS_FCC:
1662                 return RSI_REGION_FCC;
1663         case NL80211_DFS_ETSI:
1664                 return RSI_REGION_ETSI;
1665         case NL80211_DFS_JP:
1666                 return RSI_REGION_TELEC;
1667         case NL80211_DFS_UNSET:
1668                 return RSI_REGION_WORLD;
1669         }
1670         return RSI_REGION_WORLD;
1671 }
1672
1673 static void rsi_reg_notify(struct wiphy *wiphy,
1674                            struct regulatory_request *request)
1675 {
1676         struct ieee80211_supported_band *sband;
1677         struct ieee80211_channel *ch;
1678         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1679         struct rsi_hw * adapter = hw->priv;
1680         struct rsi_common *common = adapter->priv;
1681         int i;
1682
1683         mutex_lock(&common->mutex);
1684
1685         rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1686                 request->alpha2, request->dfs_region);
1687
1688         if (common->num_supp_bands > 1) {
1689                 sband = wiphy->bands[NL80211_BAND_5GHZ];
1690
1691                 for (i = 0; i < sband->n_channels; i++) {
1692                         ch = &sband->channels[i];
1693                         if (ch->flags & IEEE80211_CHAN_DISABLED)
1694                                 continue;
1695
1696                         if (ch->flags & IEEE80211_CHAN_RADAR)
1697                                 ch->flags |= IEEE80211_CHAN_NO_IR;
1698                 }
1699         }
1700         adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1701         rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1702
1703         adapter->country[0] = request->alpha2[0];
1704         adapter->country[1] = request->alpha2[1];
1705
1706         mutex_unlock(&common->mutex);
1707 }
1708
1709 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1710 {
1711         struct rsi_hw *adapter = hw->priv;
1712         struct rsi_common *common = adapter->priv;
1713
1714         mutex_lock(&common->mutex);
1715         if (common->fsm_state != FSM_MAC_INIT_DONE)
1716                 wiphy_rfkill_set_hw_state(hw->wiphy, true);
1717         else
1718                 wiphy_rfkill_set_hw_state(hw->wiphy, false);
1719         mutex_unlock(&common->mutex);
1720 }
1721
1722 static void rsi_resume_conn_channel(struct rsi_common *common)
1723 {
1724         struct rsi_hw *adapter = common->priv;
1725         struct ieee80211_vif *vif;
1726         int cnt;
1727
1728         for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1729                 vif = adapter->vifs[cnt];
1730                 if (!vif)
1731                         continue;
1732
1733                 if ((vif->type == NL80211_IFTYPE_AP) ||
1734                     (vif->type == NL80211_IFTYPE_P2P_GO)) {
1735                         rsi_switch_channel(adapter, vif);
1736                         break;
1737                 }
1738                 if (((vif->type == NL80211_IFTYPE_STATION) ||
1739                      (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1740                     vif->cfg.assoc) {
1741                         rsi_switch_channel(adapter, vif);
1742                         break;
1743                 }
1744         }
1745 }
1746
1747 void rsi_roc_timeout(struct timer_list *t)
1748 {
1749         struct rsi_common *common = from_timer(common, t, roc_timer);
1750
1751         rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1752
1753         mutex_lock(&common->mutex);
1754         ieee80211_remain_on_channel_expired(common->priv->hw);
1755
1756         if (timer_pending(&common->roc_timer))
1757                 del_timer(&common->roc_timer);
1758
1759         rsi_resume_conn_channel(common);
1760         mutex_unlock(&common->mutex);
1761 }
1762
1763 static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1764                             struct ieee80211_channel *chan, int duration,
1765                             enum ieee80211_roc_type type)
1766 {
1767         struct rsi_hw *adapter = hw->priv;
1768         struct rsi_common *common = adapter->priv;
1769         int status = 0;
1770
1771         rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1772
1773         mutex_lock(&common->mutex);
1774         rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1775                 __func__, chan->hw_value, duration);
1776
1777         if (timer_pending(&common->roc_timer)) {
1778                 rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1779                 del_timer(&common->roc_timer);
1780         }
1781         common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1782         add_timer(&common->roc_timer);
1783
1784         /* Configure band */
1785         if (rsi_band_check(common, chan)) {
1786                 rsi_dbg(ERR_ZONE, "Failed to set band\n");
1787                 status = -EINVAL;
1788                 goto out;
1789         }
1790
1791         /* Configure channel */
1792         if (rsi_set_channel(common, chan)) {
1793                 rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1794                 status = -EINVAL;
1795                 goto out;
1796         }
1797
1798         common->roc_vif = vif;
1799         ieee80211_ready_on_channel(hw);
1800         rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1801                 __func__, chan->hw_value);
1802
1803 out:
1804         mutex_unlock(&common->mutex);
1805
1806         return status;
1807 }
1808
1809 static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw,
1810                                    struct ieee80211_vif *vif)
1811 {
1812         struct rsi_hw *adapter = hw->priv;
1813         struct rsi_common *common = adapter->priv;
1814
1815         rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1816
1817         mutex_lock(&common->mutex);
1818         if (!timer_pending(&common->roc_timer)) {
1819                 mutex_unlock(&common->mutex);
1820                 return 0;
1821         }
1822
1823         del_timer(&common->roc_timer);
1824
1825         rsi_resume_conn_channel(common);
1826         mutex_unlock(&common->mutex);
1827
1828         return 0;
1829 }
1830
1831 #ifdef CONFIG_PM
1832 static const struct wiphy_wowlan_support rsi_wowlan_support = {
1833         .flags = WIPHY_WOWLAN_ANY |
1834                  WIPHY_WOWLAN_MAGIC_PKT |
1835                  WIPHY_WOWLAN_DISCONNECT |
1836                  WIPHY_WOWLAN_GTK_REKEY_FAILURE  |
1837                  WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1838                  WIPHY_WOWLAN_EAP_IDENTITY_REQ   |
1839                  WIPHY_WOWLAN_4WAY_HANDSHAKE,
1840 };
1841
1842 static u16 rsi_wow_map_triggers(struct rsi_common *common,
1843                                 struct cfg80211_wowlan *wowlan)
1844 {
1845         u16 wow_triggers = 0;
1846
1847         rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1848
1849         if (wowlan->any)
1850                 wow_triggers |= RSI_WOW_ANY;
1851         if (wowlan->magic_pkt)
1852                 wow_triggers |= RSI_WOW_MAGIC_PKT;
1853         if (wowlan->disconnect)
1854                 wow_triggers |= RSI_WOW_DISCONNECT;
1855         if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1856             wowlan->four_way_handshake)
1857                 wow_triggers |= RSI_WOW_GTK_REKEY;
1858
1859         return wow_triggers;
1860 }
1861
1862 int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1863 {
1864         struct rsi_common *common = adapter->priv;
1865         struct ieee80211_vif *vif = adapter->vifs[0];
1866         u16 triggers = 0;
1867         u16 rx_filter_word = 0;
1868
1869         rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1870
1871         if (!vif)
1872                 return -EINVAL;
1873
1874         if (WARN_ON(!wowlan)) {
1875                 rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1876                 return -EINVAL;
1877         }
1878
1879         common->wow_flags |= RSI_WOW_ENABLED;
1880         triggers = rsi_wow_map_triggers(common, wowlan);
1881         if (!triggers) {
1882                 rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1883                 return -EINVAL;
1884         }
1885         if (!vif->cfg.assoc) {
1886                 rsi_dbg(ERR_ZONE,
1887                         "Cannot configure WoWLAN (Station not connected)\n");
1888                 common->wow_flags |= RSI_WOW_NO_CONNECTION;
1889                 return 0;
1890         }
1891         rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1892
1893         if (common->coex_mode > 1)
1894                 rsi_disable_ps(adapter, adapter->vifs[0]);
1895
1896         rsi_send_wowlan_request(common, triggers, 1);
1897
1898         /**
1899          * Increase the beacon_miss threshold & keep-alive timers in
1900          * vap_update frame
1901          */
1902         rsi_send_vap_dynamic_update(common);
1903
1904         rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1905         rsi_send_rx_filter_frame(common, rx_filter_word);
1906
1907         return 0;
1908 }
1909 EXPORT_SYMBOL(rsi_config_wowlan);
1910
1911 static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1912                                 struct cfg80211_wowlan *wowlan)
1913 {
1914         struct rsi_hw *adapter = hw->priv;
1915         struct rsi_common *common = adapter->priv;
1916
1917         rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1918         mutex_lock(&common->mutex);
1919         if (rsi_config_wowlan(adapter, wowlan)) {
1920                 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1921                 mutex_unlock(&common->mutex);
1922                 return 1;
1923         }
1924         mutex_unlock(&common->mutex);
1925
1926         return 0;
1927 }
1928
1929 static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1930 {
1931         u16 rx_filter_word = 0;
1932         struct rsi_hw *adapter = hw->priv;
1933         struct rsi_common *common = adapter->priv;
1934
1935         common->wow_flags = 0;
1936
1937         rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1938
1939         if (common->hibernate_resume) {
1940                 common->mac_ops_resumed = true;
1941                 /* Device need a complete restart of all MAC operations.
1942                  * returning 1 will serve this purpose.
1943                  */
1944                 return 1;
1945         }
1946
1947         mutex_lock(&common->mutex);
1948         rsi_send_wowlan_request(common, 0, 0);
1949
1950         rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1951                           ALLOW_MGMT_ASSOC_PEER);
1952         rsi_send_rx_filter_frame(common, rx_filter_word);
1953         mutex_unlock(&common->mutex);
1954
1955         return 0;
1956 }
1957
1958 #endif
1959
1960 static const struct ieee80211_ops mac80211_ops = {
1961         .add_chanctx = ieee80211_emulate_add_chanctx,
1962         .remove_chanctx = ieee80211_emulate_remove_chanctx,
1963         .change_chanctx = ieee80211_emulate_change_chanctx,
1964         .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
1965         .tx = rsi_mac80211_tx,
1966         .wake_tx_queue = ieee80211_handle_wake_tx_queue,
1967         .start = rsi_mac80211_start,
1968         .stop = rsi_mac80211_stop,
1969         .add_interface = rsi_mac80211_add_interface,
1970         .remove_interface = rsi_mac80211_remove_interface,
1971         .config = rsi_mac80211_config,
1972         .bss_info_changed = rsi_mac80211_bss_info_changed,
1973         .conf_tx = rsi_mac80211_conf_tx,
1974         .configure_filter = rsi_mac80211_conf_filter,
1975         .set_key = rsi_mac80211_set_key,
1976         .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1977         .set_bitrate_mask = rsi_mac80211_set_rate_mask,
1978         .ampdu_action = rsi_mac80211_ampdu_action,
1979         .sta_add = rsi_mac80211_sta_add,
1980         .sta_remove = rsi_mac80211_sta_remove,
1981         .set_antenna = rsi_mac80211_set_antenna,
1982         .get_antenna = rsi_mac80211_get_antenna,
1983         .rfkill_poll = rsi_mac80211_rfkill_poll,
1984         .remain_on_channel = rsi_mac80211_roc,
1985         .cancel_remain_on_channel = rsi_mac80211_cancel_roc,
1986 #ifdef CONFIG_PM
1987         .suspend = rsi_mac80211_suspend,
1988         .resume  = rsi_mac80211_resume,
1989 #endif
1990         .hw_scan = rsi_mac80211_hw_scan_start,
1991         .cancel_hw_scan = rsi_mac80211_cancel_hw_scan,
1992 };
1993
1994 /**
1995  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1996  * @common: Pointer to the driver private structure.
1997  *
1998  * Return: 0 on success, negative error codes on failure.
1999  */
2000 int rsi_mac80211_attach(struct rsi_common *common)
2001 {
2002         int status = 0;
2003         struct ieee80211_hw *hw = NULL;
2004         struct wiphy *wiphy = NULL;
2005         struct rsi_hw *adapter = common->priv;
2006         u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
2007
2008         rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
2009
2010         hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
2011         if (!hw) {
2012                 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
2013                 return -ENOMEM;
2014         }
2015
2016         wiphy = hw->wiphy;
2017
2018         SET_IEEE80211_DEV(hw, adapter->device);
2019
2020         hw->priv = adapter;
2021         adapter->hw = hw;
2022
2023         ieee80211_hw_set(hw, SIGNAL_DBM);
2024         ieee80211_hw_set(hw, HAS_RATE_CONTROL);
2025         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2026         ieee80211_hw_set(hw, SUPPORTS_PS);
2027         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
2028
2029         hw->queues = MAX_HW_QUEUES;
2030         hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
2031
2032         hw->max_rates = 1;
2033         hw->max_rate_tries = MAX_RETRIES;
2034         hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
2035         hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
2036
2037         hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
2038         hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
2039         hw->rate_control_algorithm = "AARF";
2040
2041         SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
2042         ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
2043
2044         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2045                                  BIT(NL80211_IFTYPE_AP) |
2046                                  BIT(NL80211_IFTYPE_P2P_DEVICE) |
2047                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
2048                                  BIT(NL80211_IFTYPE_P2P_GO);
2049
2050         wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
2051         wiphy->retry_short = RETRY_SHORT;
2052         wiphy->retry_long  = RETRY_LONG;
2053         wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
2054         wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
2055         wiphy->flags = 0;
2056
2057         wiphy->available_antennas_rx = 1;
2058         wiphy->available_antennas_tx = 1;
2059
2060         status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
2061         if (status)
2062                 return status;
2063         wiphy->bands[NL80211_BAND_2GHZ] =
2064                 &adapter->sbands[NL80211_BAND_2GHZ];
2065         if (common->num_supp_bands > 1) {
2066                 status = rsi_register_rates_channels(adapter,
2067                                                      NL80211_BAND_5GHZ);
2068                 if (status)
2069                         return status;
2070                 wiphy->bands[NL80211_BAND_5GHZ] =
2071                         &adapter->sbands[NL80211_BAND_5GHZ];
2072         }
2073
2074         /* AP Parameters */
2075         wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2076         common->max_stations = wiphy->max_ap_assoc_sta;
2077         rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2078         hw->sta_data_size = sizeof(struct rsi_sta);
2079
2080         wiphy->max_scan_ssids = RSI_MAX_SCAN_SSIDS;
2081         wiphy->max_scan_ie_len = RSI_MAX_SCAN_IE_LEN;
2082         wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2083         wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2084         wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2085         wiphy->reg_notifier = rsi_reg_notify;
2086
2087 #ifdef CONFIG_PM
2088         wiphy->wowlan = &rsi_wowlan_support;
2089 #endif
2090
2091         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2092
2093         /* Wi-Fi direct parameters */
2094         wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2095         wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2096         wiphy->max_remain_on_channel_duration = 10000;
2097         hw->max_listen_interval = 10;
2098         wiphy->iface_combinations = rsi_iface_combinations;
2099         wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2100
2101         if (common->coex_mode > 1)
2102                 wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2103
2104         status = ieee80211_register_hw(hw);
2105         if (status)
2106                 return status;
2107
2108         return rsi_init_dbgfs(adapter);
2109 }