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         struct ieee80211_bss_conf *bss = &vif->bss_conf;
 241
 242         rsi_dbg(INFO_ZONE, "***** Hardware scan start *****\n");
 243         common->mac_ops_resumed = false;
 244
 245         if (common->fsm_state != FSM_MAC_INIT_DONE)
 246                 return -ENODEV;
 247
 248         if ((common->wow_flags & RSI_WOW_ENABLED) ||
 249             scan_req->n_channels == 0)
 250                 return -EINVAL;
 251
 252         /* Scan already in progress. So return */
 253         if (common->bgscan_en)
 254                 return -EBUSY;
 255
 256         /* If STA is not connected, return with special value 1, in order
 257          * to start sw_scan in mac80211
 258          */
 259         if (!bss->assoc)
 260                 return 1;
 261
 262         mutex_lock(&common->mutex);
 263         common->hwscan = scan_req;
 264         if (!rsi_send_bgscan_params(common, RSI_START_BGSCAN)) {
 265                 if (!rsi_send_bgscan_probe_req(common, vif)) {
 266                         rsi_dbg(INFO_ZONE, "Background scan started...\n");
 267                         common->bgscan_en = true;
 268                 }
 269         }
 270         mutex_unlock(&common->mutex);
 271
 272         return 0;
 273 }
 274
 275 static void rsi_mac80211_cancel_hw_scan(struct ieee80211_hw *hw,
 276                                         struct ieee80211_vif *vif)
 277 {
 278         struct rsi_hw *adapter = hw->priv;
 279         struct rsi_common *common = adapter->priv;
 280         struct cfg80211_scan_info info;
 281
 282         rsi_dbg(INFO_ZONE, "***** Hardware scan stop *****\n");
 283         mutex_lock(&common->mutex);
 284
 285         if (common->bgscan_en) {
 286                 if (!rsi_send_bgscan_params(common, RSI_STOP_BGSCAN))
 287                         common->bgscan_en = false;
 288                 info.aborted = false;
 289                 ieee80211_scan_completed(adapter->hw, &info);
 290                 rsi_dbg(INFO_ZONE, "Back ground scan cancelled\n");
 291         }
 292         common->hwscan = NULL;
 293         mutex_unlock(&common->mutex);
 294 }
 295
 296 /**
 297  * rsi_mac80211_detach() - This function is used to de-initialize the
 298  *                         Mac80211 stack.
 299  * @adapter: Pointer to the adapter structure.
 300  *
 301  * Return: None.
 302  */
 303 void rsi_mac80211_detach(struct rsi_hw *adapter)
 304 {
 305         struct ieee80211_hw *hw = adapter->hw;
 306         enum nl80211_band band;
 307
 308         if (hw) {
 309                 ieee80211_stop_queues(hw);
 310                 ieee80211_unregister_hw(hw);
 311                 ieee80211_free_hw(hw);
 312                 adapter->hw = NULL;
 313         }
 314
 315         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 316                 struct ieee80211_supported_band *sband =
 317                                         &adapter->sbands[band];
 318
 319                 kfree(sband->channels);
 320         }
 321
 322 #ifdef CONFIG_RSI_DEBUGFS
 323         rsi_remove_dbgfs(adapter);
 324         kfree(adapter->dfsentry);
 325 #endif
 326 }
 327 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
 328
 329 /**
 330  * rsi_indicate_tx_status() - This function indicates the transmit status.
 331  * @adapter: Pointer to the adapter structure.
 332  * @skb: Pointer to the socket buffer structure.
 333  * @status: Status
 334  *
 335  * Return: None.
 336  */
 337 void rsi_indicate_tx_status(struct rsi_hw *adapter,
 338                             struct sk_buff *skb,
 339                             int status)
 340 {
 341         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 342         struct skb_info *tx_params;
 343
 344         if (!adapter->hw) {
 345                 rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
 346                 return;
 347         }
 348
 349         if (!status)
 350                 info->flags |= IEEE80211_TX_STAT_ACK;
 351
 352         tx_params = (struct skb_info *)info->driver_data;
 353         skb_pull(skb, tx_params->internal_hdr_size);
 354         memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
 355
 356         ieee80211_tx_status_irqsafe(adapter->hw, skb);
 357 }
 358
 359 /**
 360  * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
 361  *                     transmitted frame.SKB contains the buffer starting
 362  *                     from the IEEE 802.11 header.
 363  * @hw: Pointer to the ieee80211_hw structure.
 364  * @control: Pointer to the ieee80211_tx_control structure
 365  * @skb: Pointer to the socket buffer structure.
 366  *
 367  * Return: None
 368  */
 369 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
 370                             struct ieee80211_tx_control *control,
 371                             struct sk_buff *skb)
 372 {
 373         struct rsi_hw *adapter = hw->priv;
 374         struct rsi_common *common = adapter->priv;
 375         struct ieee80211_hdr *wlh = (struct ieee80211_hdr *)skb->data;
 376
 377         if (ieee80211_is_auth(wlh->frame_control))
 378                 common->mac_ops_resumed = false;
 379
 380         rsi_core_xmit(common, skb);
 381 }
 382
 383 /**
 384  * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
 385  *                        the driver init is complete by then, just
 386  *                        returns success.
 387  * @hw: Pointer to the ieee80211_hw structure.
 388  *
 389  * Return: 0 as success.
 390  */
 391 static int rsi_mac80211_start(struct ieee80211_hw *hw)
 392 {
 393         struct rsi_hw *adapter = hw->priv;
 394         struct rsi_common *common = adapter->priv;
 395
 396         rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
 397         mutex_lock(&common->mutex);
 398         if (common->hibernate_resume) {
 399                 common->reinit_hw = true;
 400                 adapter->host_intf_ops->reinit_device(adapter);
 401                 wait_for_completion(&adapter->priv->wlan_init_completion);
 402         }
 403         common->iface_down = false;
 404         wiphy_rfkill_start_polling(hw->wiphy);
 405         rsi_send_rx_filter_frame(common, 0);
 406         mutex_unlock(&common->mutex);
 407
 408         return 0;
 409 }
 410
 411 /**
 412  * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
 413  * @hw: Pointer to the ieee80211_hw structure.
 414  *
 415  * Return: None.
 416  */
 417 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
 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                 common->min_rate = RSI_RATE_AUTO;
 514                 for (i = 0; i < common->max_stations; i++)
 515                         common->stations[i].sta = NULL;
 516         }
 517
 518         mutex_unlock(&common->mutex);
 519
 520         return 0;
 521 }
 522
 523 /**
 524  * rsi_mac80211_remove_interface() - This function notifies driver that an
 525  *                                   interface is going down.
 526  * @hw: Pointer to the ieee80211_hw structure.
 527  * @vif: Pointer to the ieee80211_vif structure.
 528  *
 529  * Return: None.
 530  */
 531 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
 532                                           struct ieee80211_vif *vif)
 533 {
 534         struct rsi_hw *adapter = hw->priv;
 535         struct rsi_common *common = adapter->priv;
 536         enum opmode opmode;
 537         int i;
 538
 539         rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
 540
 541         mutex_lock(&common->mutex);
 542
 543         if (adapter->sc_nvifs <= 0) {
 544                 mutex_unlock(&common->mutex);
 545                 return;
 546         }
 547
 548         opmode = rsi_map_intf_mode(vif->type);
 549         if (opmode == RSI_OPMODE_UNSUPPORTED) {
 550                 rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
 551                 mutex_unlock(&common->mutex);
 552                 return;
 553         }
 554         for (i = 0; i < RSI_MAX_VIFS; i++) {
 555                 if (!adapter->vifs[i])
 556                         continue;
 557                 if (vif == adapter->vifs[i]) {
 558                         rsi_set_vap_capabilities(common, opmode, vif->addr,
 559                                                  i, VAP_DELETE);
 560                         adapter->sc_nvifs--;
 561                         adapter->vifs[i] = NULL;
 562                 }
 563         }
 564         mutex_unlock(&common->mutex);
 565 }
 566
 567 /**
 568  * rsi_channel_change() - This function is a performs the checks
 569  *                        required for changing a channel and sets
 570  *                        the channel accordingly.
 571  * @hw: Pointer to the ieee80211_hw structure.
 572  *
 573  * Return: 0 on success, negative error code on failure.
 574  */
 575 static int rsi_channel_change(struct ieee80211_hw *hw)
 576 {
 577         struct rsi_hw *adapter = hw->priv;
 578         struct rsi_common *common = adapter->priv;
 579         int status = -EOPNOTSUPP;
 580         struct ieee80211_channel *curchan = hw->conf.chandef.chan;
 581         u16 channel = curchan->hw_value;
 582         struct ieee80211_vif *vif;
 583         struct ieee80211_bss_conf *bss;
 584         bool assoc = false;
 585         int i;
 586
 587         rsi_dbg(INFO_ZONE,
 588                 "%s: Set channel: %d MHz type: %d channel_no %d\n",
 589                 __func__, curchan->center_freq,
 590                 curchan->flags, channel);
 591
 592         for (i = 0; i < RSI_MAX_VIFS; i++) {
 593                 vif = adapter->vifs[i];
 594                 if (!vif)
 595                         continue;
 596                 if (vif->type == NL80211_IFTYPE_STATION) {
 597                         bss = &vif->bss_conf;
 598                         if (bss->assoc) {
 599                                 assoc = true;
 600                                 break;
 601                         }
 602                 }
 603         }
 604         if (assoc) {
 605                 if (!common->hw_data_qs_blocked &&
 606                     (rsi_get_connected_channel(vif) != channel)) {
 607                         rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
 608                         if (!rsi_send_block_unblock_frame(common, true))
 609                                 common->hw_data_qs_blocked = true;
 610                 }
 611         }
 612
 613         status = rsi_band_check(common, curchan);
 614         if (!status)
 615                 status = rsi_set_channel(adapter->priv, curchan);
 616
 617         if (assoc) {
 618                 if (common->hw_data_qs_blocked &&
 619                     (rsi_get_connected_channel(vif) == channel)) {
 620                         rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 621                         if (!rsi_send_block_unblock_frame(common, false))
 622                                 common->hw_data_qs_blocked = false;
 623                 }
 624         }
 625
 626         return status;
 627 }
 628
 629 /**
 630  * rsi_config_power() - This function configures tx power to device
 631  * @hw: Pointer to the ieee80211_hw structure.
 632  *
 633  * Return: 0 on success, negative error code on failure.
 634  */
 635 static int rsi_config_power(struct ieee80211_hw *hw)
 636 {
 637         struct rsi_hw *adapter = hw->priv;
 638         struct rsi_common *common = adapter->priv;
 639         struct ieee80211_conf *conf = &hw->conf;
 640
 641         if (adapter->sc_nvifs <= 0) {
 642                 rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
 643                 return -EINVAL;
 644         }
 645
 646         rsi_dbg(INFO_ZONE,
 647                 "%s: Set tx power: %d dBM\n", __func__, conf->power_level);
 648
 649         if (conf->power_level == common->tx_power)
 650                 return 0;
 651
 652         common->tx_power = conf->power_level;
 653
 654         return rsi_send_radio_params_update(common);
 655 }
 656
 657 /**
 658  * rsi_mac80211_config() - This function is a handler for configuration
 659  *                         requests. The stack calls this function to
 660  *                         change hardware configuration, e.g., channel.
 661  * @hw: Pointer to the ieee80211_hw structure.
 662  * @changed: Changed flags set.
 663  *
 664  * Return: 0 on success, negative error code on failure.
 665  */
 666 static int rsi_mac80211_config(struct ieee80211_hw *hw,
 667                                u32 changed)
 668 {
 669         struct rsi_hw *adapter = hw->priv;
 670         struct rsi_common *common = adapter->priv;
 671         struct ieee80211_conf *conf = &hw->conf;
 672         int status = -EOPNOTSUPP;
 673
 674         mutex_lock(&common->mutex);
 675
 676         if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
 677                 status = rsi_channel_change(hw);
 678
 679         /* tx power */
 680         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 681                 rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
 682                 status = rsi_config_power(hw);
 683         }
 684
 685         /* Power save parameters */
 686         if ((changed & IEEE80211_CONF_CHANGE_PS) &&
 687             !common->mac_ops_resumed) {
 688                 struct ieee80211_vif *vif, *sta_vif = NULL;
 689                 unsigned long flags;
 690                 int i, set_ps = 1;
 691
 692                 for (i = 0; i < RSI_MAX_VIFS; i++) {
 693                         vif = adapter->vifs[i];
 694                         if (!vif)
 695                                 continue;
 696                         /* Don't go to power save if AP vap exists */
 697                         if ((vif->type == NL80211_IFTYPE_AP) ||
 698                             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 699                                 set_ps = 0;
 700                                 break;
 701                         }
 702                         if ((vif->type == NL80211_IFTYPE_STATION ||
 703                              vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
 704                             (!sta_vif || vif->bss_conf.assoc))
 705                                 sta_vif = vif;
 706                 }
 707                 if (set_ps && sta_vif) {
 708                         spin_lock_irqsave(&adapter->ps_lock, flags);
 709                         if (conf->flags & IEEE80211_CONF_PS)
 710                                 rsi_enable_ps(adapter, sta_vif);
 711                         else
 712                                 rsi_disable_ps(adapter, sta_vif);
 713                         spin_unlock_irqrestore(&adapter->ps_lock, flags);
 714                 }
 715         }
 716
 717         /* RTS threshold */
 718         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 719                 rsi_dbg(INFO_ZONE, "RTS threshold\n");
 720                 if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
 721                         rsi_dbg(INFO_ZONE,
 722                                 "%s: Sending vap updates....\n", __func__);
 723                         status = rsi_send_vap_dynamic_update(common);
 724                 }
 725         }
 726         mutex_unlock(&common->mutex);
 727
 728         return status;
 729 }
 730
 731 /**
 732  * rsi_get_connected_channel() - This function is used to get the current
 733  *                               connected channel number.
 734  * @vif: Pointer to the ieee80211_vif structure.
 735  *
 736  * Return: Current connected AP's channel number is returned.
 737  */
 738 u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
 739 {
 740         struct ieee80211_bss_conf *bss;
 741         struct ieee80211_channel *channel;
 742
 743         if (!vif)
 744                 return 0;
 745
 746         bss = &vif->bss_conf;
 747         channel = bss->chandef.chan;
 748
 749         if (!channel)
 750                 return 0;
 751
 752         return channel->hw_value;
 753 }
 754
 755 static void rsi_switch_channel(struct rsi_hw *adapter,
 756                                struct ieee80211_vif *vif)
 757 {
 758         struct rsi_common *common = adapter->priv;
 759         struct ieee80211_channel *channel;
 760
 761         if (common->iface_down)
 762                 return;
 763         if (!vif)
 764                 return;
 765
 766         channel = vif->bss_conf.chandef.chan;
 767
 768         if (!channel)
 769                 return;
 770
 771         rsi_band_check(common, channel);
 772         rsi_set_channel(common, channel);
 773         rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
 774 }
 775
 776 /**
 777  * rsi_mac80211_bss_info_changed() - This function is a handler for config
 778  *                                   requests related to BSS parameters that
 779  *                                   may vary during BSS's lifespan.
 780  * @hw: Pointer to the ieee80211_hw structure.
 781  * @vif: Pointer to the ieee80211_vif structure.
 782  * @bss_conf: Pointer to the ieee80211_bss_conf structure.
 783  * @changed: Changed flags set.
 784  *
 785  * Return: None.
 786  */
 787 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 788                                           struct ieee80211_vif *vif,
 789                                           struct ieee80211_bss_conf *bss_conf,
 790                                           u32 changed)
 791 {
 792         struct rsi_hw *adapter = hw->priv;
 793         struct rsi_common *common = adapter->priv;
 794         struct ieee80211_bss_conf *bss = &vif->bss_conf;
 795         struct ieee80211_conf *conf = &hw->conf;
 796         u16 rx_filter_word = 0;
 797
 798         mutex_lock(&common->mutex);
 799         if (changed & BSS_CHANGED_ASSOC) {
 800                 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
 801                         __func__, bss_conf->assoc);
 802                 if (bss_conf->assoc) {
 803                         /* Send the RX filter frame */
 804                         rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
 805                                           ALLOW_CTRL_ASSOC_PEER |
 806                                           ALLOW_MGMT_ASSOC_PEER);
 807                         rsi_send_rx_filter_frame(common, rx_filter_word);
 808                 }
 809                 rsi_inform_bss_status(common,
 810                                       RSI_OPMODE_STA,
 811                                       bss_conf->assoc,
 812                                       bss_conf->bssid,
 813                                       bss_conf->qos,
 814                                       bss_conf->aid,
 815                                       NULL, 0,
 816                                       bss_conf->assoc_capability, vif);
 817                 adapter->ps_info.dtim_interval_duration = bss->dtim_period;
 818                 adapter->ps_info.listen_interval = conf->listen_interval;
 819
 820                 /* If U-APSD is updated, send ps parameters to firmware */
 821                 if (bss->assoc) {
 822                         if (common->uapsd_bitmap) {
 823                                 rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
 824                                 rsi_conf_uapsd(adapter, vif);
 825                         }
 826                 } else {
 827                         common->uapsd_bitmap = 0;
 828                 }
 829         }
 830
 831         if (changed & BSS_CHANGED_CQM) {
 832                 common->cqm_info.last_cqm_event_rssi = 0;
 833                 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
 834                 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
 835                 rsi_dbg(INFO_ZONE, "RSSI threshold & hysteresis are: %d %d\n",
 836                         common->cqm_info.rssi_thold,
 837                         common->cqm_info.rssi_hyst);
 838         }
 839
 840         if (changed & BSS_CHANGED_BEACON_INT) {
 841                 rsi_dbg(INFO_ZONE, "%s: Changed Beacon interval: %d\n",
 842                         __func__, bss_conf->beacon_int);
 843                 if (common->beacon_interval != bss->beacon_int) {
 844                         common->beacon_interval = bss->beacon_int;
 845                         if (vif->type == NL80211_IFTYPE_AP) {
 846                                 struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 847
 848                                 rsi_set_vap_capabilities(common, RSI_OPMODE_AP,
 849                                                          vif->addr, vif_info->vap_id,
 850                                                          VAP_UPDATE);
 851                         }
 852                 }
 853                 adapter->ps_info.listen_interval =
 854                         bss->beacon_int * adapter->ps_info.num_bcns_per_lis_int;
 855         }
 856
 857         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
 858             ((vif->type == NL80211_IFTYPE_AP) ||
 859              (vif->type == NL80211_IFTYPE_P2P_GO))) {
 860                 if (bss->enable_beacon) {
 861                         rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
 862                         common->beacon_enabled = 1;
 863                 } else {
 864                         rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
 865                         common->beacon_enabled = 0;
 866                 }
 867         }
 868
 869         mutex_unlock(&common->mutex);
 870 }
 871
 872 /**
 873  * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
 874  * @hw: Pointer to the ieee80211_hw structure.
 875  * @changed_flags: Changed flags set.
 876  * @total_flags: Total initial flags set.
 877  * @multicast: Multicast.
 878  *
 879  * Return: None.
 880  */
 881 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
 882                                      u32 changed_flags,
 883                                      u32 *total_flags,
 884                                      u64 multicast)
 885 {
 886         /* Not doing much here as of now */
 887         *total_flags &= RSI_SUPP_FILTERS;
 888 }
 889
 890 /**
 891  * rsi_mac80211_conf_tx() - This function configures TX queue parameters
 892  *                          (EDCF (aifs, cw_min, cw_max), bursting)
 893  *                          for a hardware TX queue.
 894  * @hw: Pointer to the ieee80211_hw structure
 895  * @vif: Pointer to the ieee80211_vif structure.
 896  * @queue: Queue number.
 897  * @params: Pointer to ieee80211_tx_queue_params structure.
 898  *
 899  * Return: 0 on success, negative error code on failure.
 900  */
 901 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
 902                                 struct ieee80211_vif *vif, u16 queue,
 903                                 const struct ieee80211_tx_queue_params *params)
 904 {
 905         struct rsi_hw *adapter = hw->priv;
 906         struct rsi_common *common = adapter->priv;
 907         u8 idx = 0;
 908
 909         if (queue >= IEEE80211_NUM_ACS)
 910                 return 0;
 911
 912         rsi_dbg(INFO_ZONE,
 913                 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
 914                 __func__, queue, params->aifs,
 915                 params->cw_min, params->cw_max, params->txop);
 916
 917         mutex_lock(&common->mutex);
 918         /* Map into the way the f/w expects */
 919         switch (queue) {
 920         case IEEE80211_AC_VO:
 921                 idx = VO_Q;
 922                 break;
 923         case IEEE80211_AC_VI:
 924                 idx = VI_Q;
 925                 break;
 926         case IEEE80211_AC_BE:
 927                 idx = BE_Q;
 928                 break;
 929         case IEEE80211_AC_BK:
 930                 idx = BK_Q;
 931                 break;
 932         default:
 933                 idx = BE_Q;
 934                 break;
 935         }
 936
 937         memcpy(&common->edca_params[idx],
 938                params,
 939                sizeof(struct ieee80211_tx_queue_params));
 940
 941         if (params->uapsd)
 942                 common->uapsd_bitmap |= idx;
 943         else
 944                 common->uapsd_bitmap &= (~idx);
 945
 946         mutex_unlock(&common->mutex);
 947
 948         return 0;
 949 }
 950
 951 /**
 952  * rsi_hal_key_config() - This function loads the keys into the firmware.
 953  * @hw: Pointer to the ieee80211_hw structure.
 954  * @vif: Pointer to the ieee80211_vif structure.
 955  * @key: Pointer to the ieee80211_key_conf structure.
 956  * @sta: Pointer to the ieee80211_sta structure.
 957  *
 958  * Return: status: 0 on success, negative error codes on failure.
 959  */
 960 static int rsi_hal_key_config(struct ieee80211_hw *hw,
 961                               struct ieee80211_vif *vif,
 962                               struct ieee80211_key_conf *key,
 963                               struct ieee80211_sta *sta)
 964 {
 965         struct rsi_hw *adapter = hw->priv;
 966         struct rsi_sta *rsta = NULL;
 967         int status;
 968         u8 key_type;
 969         s16 sta_id = 0;
 970
 971         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 972                 key_type = RSI_PAIRWISE_KEY;
 973         else
 974                 key_type = RSI_GROUP_KEY;
 975
 976         rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
 977                 __func__, key->cipher, key_type, key->keylen);
 978
 979         if ((vif->type == NL80211_IFTYPE_AP) ||
 980             (vif->type == NL80211_IFTYPE_P2P_GO)) {
 981                 if (sta) {
 982                         rsta = rsi_find_sta(adapter->priv, sta->addr);
 983                         if (rsta)
 984                                 sta_id = rsta->sta_id;
 985                 }
 986                 adapter->priv->key = key;
 987         } else {
 988                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
 989                     (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 990                         status = rsi_hal_load_key(adapter->priv,
 991                                                   key->key,
 992                                                   key->keylen,
 993                                                   RSI_PAIRWISE_KEY,
 994                                                   key->keyidx,
 995                                                   key->cipher,
 996                                                   sta_id,
 997                                                   vif);
 998                         if (status)
 999                                 return status;
1000                 }
1001         }
1002
1003         status = rsi_hal_load_key(adapter->priv,
1004                                   key->key,
1005                                   key->keylen,
1006                                   key_type,
1007                                   key->keyidx,
1008                                   key->cipher,
1009                                   sta_id,
1010                                   vif);
1011         if (status)
1012                 return status;
1013
1014         if (vif->type == NL80211_IFTYPE_STATION &&
1015             (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
1016              key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
1017                 if (!rsi_send_block_unblock_frame(adapter->priv, false))
1018                         adapter->priv->hw_data_qs_blocked = false;
1019         }
1020
1021         return 0;
1022 }
1023
1024 /**
1025  * rsi_mac80211_set_key() - This function sets type of key to be loaded.
1026  * @hw: Pointer to the ieee80211_hw structure.
1027  * @cmd: enum set_key_cmd.
1028  * @vif: Pointer to the ieee80211_vif structure.
1029  * @sta: Pointer to the ieee80211_sta structure.
1030  * @key: Pointer to the ieee80211_key_conf structure.
1031  *
1032  * Return: status: 0 on success, negative error code on failure.
1033  */
1034 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
1035                                 enum set_key_cmd cmd,
1036                                 struct ieee80211_vif *vif,
1037                                 struct ieee80211_sta *sta,
1038                                 struct ieee80211_key_conf *key)
1039 {
1040         struct rsi_hw *adapter = hw->priv;
1041         struct rsi_common *common = adapter->priv;
1042         struct security_info *secinfo = &common->secinfo;
1043         int status;
1044
1045         mutex_lock(&common->mutex);
1046         switch (cmd) {
1047         case SET_KEY:
1048                 status = rsi_hal_key_config(hw, vif, key, sta);
1049                 if (status) {
1050                         mutex_unlock(&common->mutex);
1051                         return status;
1052                 }
1053
1054                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
1055                         secinfo->ptk_cipher = key->cipher;
1056                 else
1057                         secinfo->gtk_cipher = key->cipher;
1058
1059                 key->hw_key_idx = key->keyidx;
1060                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1061
1062                 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
1063                 break;
1064
1065         case DISABLE_KEY:
1066                 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
1067                 memset(key, 0, sizeof(struct ieee80211_key_conf));
1068                 status = rsi_hal_key_config(hw, vif, key, sta);
1069                 break;
1070
1071         default:
1072                 status = -EOPNOTSUPP;
1073                 break;
1074         }
1075
1076         mutex_unlock(&common->mutex);
1077         return status;
1078 }
1079
1080 /**
1081  * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
1082  *                               the corresponding mlme_action flag and
1083  *                               informs the f/w regarding this.
1084  * @hw: Pointer to the ieee80211_hw structure.
1085  * @vif: Pointer to the ieee80211_vif structure.
1086  * @params: Pointer to A-MPDU action parameters
1087  *
1088  * Return: status: 0 on success, negative error code on failure.
1089  */
1090 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1091                                      struct ieee80211_vif *vif,
1092                                      struct ieee80211_ampdu_params *params)
1093 {
1094         int status = -EOPNOTSUPP;
1095         struct rsi_hw *adapter = hw->priv;
1096         struct rsi_common *common = adapter->priv;
1097         struct rsi_sta *rsta = NULL;
1098         u16 seq_no = 0, seq_start = 0;
1099         u8 ii = 0;
1100         struct ieee80211_sta *sta = params->sta;
1101         u8 sta_id = 0;
1102         enum ieee80211_ampdu_mlme_action action = params->action;
1103         u16 tid = params->tid;
1104         u16 *ssn = &params->ssn;
1105         u8 buf_size = params->buf_size;
1106
1107         for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1108                 if (vif == adapter->vifs[ii])
1109                         break;
1110         }
1111
1112         mutex_lock(&common->mutex);
1113
1114         if (ssn != NULL)
1115                 seq_no = *ssn;
1116
1117         if ((vif->type == NL80211_IFTYPE_AP) ||
1118             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1119                 rsta = rsi_find_sta(common, sta->addr);
1120                 if (!rsta) {
1121                         rsi_dbg(ERR_ZONE, "No station mapped\n");
1122                         status = 0;
1123                         goto unlock;
1124                 }
1125                 sta_id = rsta->sta_id;
1126         }
1127
1128         rsi_dbg(INFO_ZONE,
1129                 "%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1130                 __func__, tid, seq_no, buf_size, sta_id);
1131
1132         switch (action) {
1133         case IEEE80211_AMPDU_RX_START:
1134                 status = rsi_send_aggregation_params_frame(common,
1135                                                            tid,
1136                                                            seq_no,
1137                                                            buf_size,
1138                                                            STA_RX_ADDBA_DONE,
1139                                                            sta_id);
1140                 break;
1141
1142         case IEEE80211_AMPDU_RX_STOP:
1143                 status = rsi_send_aggregation_params_frame(common,
1144                                                            tid,
1145                                                            0,
1146                                                            buf_size,
1147                                                            STA_RX_DELBA,
1148                                                            sta_id);
1149                 break;
1150
1151         case IEEE80211_AMPDU_TX_START:
1152                 if ((vif->type == NL80211_IFTYPE_STATION) ||
1153                     (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1154                         common->vif_info[ii].seq_start = seq_no;
1155                 else if ((vif->type == NL80211_IFTYPE_AP) ||
1156                          (vif->type == NL80211_IFTYPE_P2P_GO))
1157                         rsta->seq_start[tid] = seq_no;
1158                 status = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1159                 break;
1160
1161         case IEEE80211_AMPDU_TX_STOP_CONT:
1162         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1163         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1164                 status = rsi_send_aggregation_params_frame(common,
1165                                                            tid,
1166                                                            seq_no,
1167                                                            buf_size,
1168                                                            STA_TX_DELBA,
1169                                                            sta_id);
1170                 if (!status)
1171                         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1172                 break;
1173
1174         case IEEE80211_AMPDU_TX_OPERATIONAL:
1175                 if ((vif->type == NL80211_IFTYPE_STATION) ||
1176                     (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1177                         seq_start = common->vif_info[ii].seq_start;
1178                 else if ((vif->type == NL80211_IFTYPE_AP) ||
1179                          (vif->type == NL80211_IFTYPE_P2P_GO))
1180                         seq_start = rsta->seq_start[tid];
1181                 status = rsi_send_aggregation_params_frame(common,
1182                                                            tid,
1183                                                            seq_start,
1184                                                            buf_size,
1185                                                            STA_TX_ADDBA_DONE,
1186                                                            sta_id);
1187                 break;
1188
1189         default:
1190                 rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1191                 break;
1192         }
1193
1194 unlock:
1195         mutex_unlock(&common->mutex);
1196         return status;
1197 }
1198
1199 /**
1200  * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1201  * @hw: Pointer to the ieee80211_hw structure.
1202  * @value: Rts threshold value.
1203  *
1204  * Return: 0 on success.
1205  */
1206 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1207                                           u32 value)
1208 {
1209         struct rsi_hw *adapter = hw->priv;
1210         struct rsi_common *common = adapter->priv;
1211
1212         mutex_lock(&common->mutex);
1213         common->rts_threshold = value;
1214         mutex_unlock(&common->mutex);
1215
1216         return 0;
1217 }
1218
1219 /**
1220  * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1221  * @hw: Pointer to the ieee80211_hw structure
1222  * @vif: Pointer to the ieee80211_vif structure.
1223  * @mask: Pointer to the cfg80211_bitrate_mask structure.
1224  *
1225  * Return: 0 on success.
1226  */
1227 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1228                                       struct ieee80211_vif *vif,
1229                                       const struct cfg80211_bitrate_mask *mask)
1230 {
1231         struct rsi_hw *adapter = hw->priv;
1232         struct rsi_common *common = adapter->priv;
1233         enum nl80211_band band = hw->conf.chandef.chan->band;
1234
1235         mutex_lock(&common->mutex);
1236         common->fixedrate_mask[band] = 0;
1237
1238         if (mask->control[band].legacy == 0xfff) {
1239                 common->fixedrate_mask[band] =
1240                         (mask->control[band].ht_mcs[0] << 12);
1241         } else {
1242                 common->fixedrate_mask[band] =
1243                         mask->control[band].legacy;
1244         }
1245         mutex_unlock(&common->mutex);
1246
1247         return 0;
1248 }
1249
1250 /**
1251  * rsi_perform_cqm() - This function performs cqm.
1252  * @common: Pointer to the driver private structure.
1253  * @bssid: pointer to the bssid.
1254  * @rssi: RSSI value.
1255  * @vif: Pointer to the ieee80211_vif structure.
1256  */
1257 static void rsi_perform_cqm(struct rsi_common *common,
1258                             u8 *bssid,
1259                             s8 rssi,
1260                             struct ieee80211_vif *vif)
1261 {
1262         s8 last_event = common->cqm_info.last_cqm_event_rssi;
1263         int thold = common->cqm_info.rssi_thold;
1264         u32 hyst = common->cqm_info.rssi_hyst;
1265         enum nl80211_cqm_rssi_threshold_event event;
1266
1267         if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1268                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1269         else if (rssi > thold &&
1270                  (last_event == 0 || rssi > (last_event + hyst)))
1271                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1272         else
1273                 return;
1274
1275         common->cqm_info.last_cqm_event_rssi = rssi;
1276         rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1277         ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1278
1279         return;
1280 }
1281
1282 /**
1283  * rsi_fill_rx_status() - This function fills rx status in
1284  *                        ieee80211_rx_status structure.
1285  * @hw: Pointer to the ieee80211_hw structure.
1286  * @skb: Pointer to the socket buffer structure.
1287  * @common: Pointer to the driver private structure.
1288  * @rxs: Pointer to the ieee80211_rx_status structure.
1289  *
1290  * Return: None.
1291  */
1292 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1293                                struct sk_buff *skb,
1294                                struct rsi_common *common,
1295                                struct ieee80211_rx_status *rxs)
1296 {
1297         struct rsi_hw *adapter = common->priv;
1298         struct ieee80211_vif *vif;
1299         struct ieee80211_bss_conf *bss = NULL;
1300         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1301         struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1302         struct ieee80211_hdr *hdr;
1303         char rssi = rx_params->rssi;
1304         u8 hdrlen = 0;
1305         u8 channel = rx_params->channel;
1306         s32 freq;
1307         int i;
1308
1309         hdr = ((struct ieee80211_hdr *)(skb->data));
1310         hdrlen = ieee80211_hdrlen(hdr->frame_control);
1311
1312         memset(info, 0, sizeof(struct ieee80211_tx_info));
1313
1314         rxs->signal = -(rssi);
1315
1316         rxs->band = common->band;
1317
1318         freq = ieee80211_channel_to_frequency(channel, rxs->band);
1319
1320         if (freq)
1321                 rxs->freq = freq;
1322
1323         if (ieee80211_has_protected(hdr->frame_control)) {
1324                 if (rsi_is_cipher_wep(common)) {
1325                         memmove(skb->data + 4, skb->data, hdrlen);
1326                         skb_pull(skb, 4);
1327                 } else {
1328                         memmove(skb->data + 8, skb->data, hdrlen);
1329                         skb_pull(skb, 8);
1330                         rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1331                 }
1332                 rxs->flag |= RX_FLAG_DECRYPTED;
1333                 rxs->flag |= RX_FLAG_IV_STRIPPED;
1334         }
1335
1336         for (i = 0; i < RSI_MAX_VIFS; i++) {
1337                 vif = adapter->vifs[i];
1338                 if (!vif)
1339                         continue;
1340                 if (vif->type == NL80211_IFTYPE_STATION) {
1341                         bss = &vif->bss_conf;
1342                         break;
1343                 }
1344         }
1345         if (!bss)
1346                 return;
1347         /* CQM only for connected AP beacons, the RSSI is a weighted avg */
1348         if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1349                 if (ieee80211_is_beacon(hdr->frame_control))
1350                         rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1351         }
1352
1353         return;
1354 }
1355
1356 /**
1357  * rsi_indicate_pkt_to_os() - This function sends received packet to mac80211.
1358  * @common: Pointer to the driver private structure.
1359  * @skb: Pointer to the socket buffer structure.
1360  *
1361  * Return: None.
1362  */
1363 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1364                             struct sk_buff *skb)
1365 {
1366         struct rsi_hw *adapter = common->priv;
1367         struct ieee80211_hw *hw = adapter->hw;
1368         struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1369
1370         if ((common->iface_down) || (!adapter->sc_nvifs)) {
1371                 dev_kfree_skb(skb);
1372                 return;
1373         }
1374
1375         /* filling in the ieee80211_rx_status flags */
1376         rsi_fill_rx_status(hw, skb, common, rx_status);
1377
1378         ieee80211_rx_irqsafe(hw, skb);
1379 }
1380
1381 static void rsi_set_min_rate(struct ieee80211_hw *hw,
1382                              struct ieee80211_sta *sta,
1383                              struct rsi_common *common)
1384 {
1385         u8 band = hw->conf.chandef.chan->band;
1386         u8 ii;
1387         u32 rate_bitmap;
1388         bool matched = false;
1389
1390         common->bitrate_mask[band] = sta->supp_rates[band];
1391
1392         rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
1393
1394         if (rate_bitmap & 0xfff) {
1395                 /* Find out the min rate */
1396                 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
1397                         if (rate_bitmap & BIT(ii)) {
1398                                 common->min_rate = rsi_rates[ii].hw_value;
1399                                 matched = true;
1400                                 break;
1401                         }
1402                 }
1403         }
1404
1405         common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
1406
1407         if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
1408                 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
1409                         if ((rate_bitmap >> 12) & BIT(ii)) {
1410                                 common->min_rate = rsi_mcsrates[ii];
1411                                 matched = true;
1412                                 break;
1413                         }
1414                 }
1415         }
1416
1417         if (!matched)
1418                 common->min_rate = 0xffff;
1419 }
1420
1421 /**
1422  * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1423  *                          connected.
1424  * @hw: pointer to the ieee80211_hw structure.
1425  * @vif: Pointer to the ieee80211_vif structure.
1426  * @sta: Pointer to the ieee80211_sta structure.
1427  *
1428  * Return: 0 on success, negative error codes on failure.
1429  */
1430 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1431                                 struct ieee80211_vif *vif,
1432                                 struct ieee80211_sta *sta)
1433 {
1434         struct rsi_hw *adapter = hw->priv;
1435         struct rsi_common *common = adapter->priv;
1436         bool sta_exist = false;
1437         struct rsi_sta *rsta;
1438         int status = 0;
1439
1440         rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1441
1442         mutex_lock(&common->mutex);
1443
1444         if ((vif->type == NL80211_IFTYPE_AP) ||
1445             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1446                 u8 cnt;
1447                 int sta_idx = -1;
1448                 int free_index = -1;
1449
1450                 /* Check if max stations reached */
1451                 if (common->num_stations >= common->max_stations) {
1452                         rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1453                         status = -EOPNOTSUPP;
1454                         goto unlock;
1455                 }
1456                 for (cnt = 0; cnt < common->max_stations; cnt++) {
1457                         rsta = &common->stations[cnt];
1458
1459                         if (!rsta->sta) {
1460                                 if (free_index < 0)
1461                                         free_index = cnt;
1462                                 continue;
1463                         }
1464                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1465                                 rsi_dbg(INFO_ZONE, "Station exists\n");
1466                                 sta_idx = cnt;
1467                                 sta_exist = true;
1468                                 break;
1469                         }
1470                 }
1471                 if (!sta_exist) {
1472                         if (free_index >= 0)
1473                                 sta_idx = free_index;
1474                 }
1475                 if (sta_idx < 0) {
1476                         rsi_dbg(ERR_ZONE,
1477                                 "%s: Some problem reaching here...\n",
1478                                 __func__);
1479                         status = -EINVAL;
1480                         goto unlock;
1481                 }
1482                 rsta = &common->stations[sta_idx];
1483                 rsta->sta = sta;
1484                 rsta->sta_id = sta_idx;
1485                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1486                         rsta->start_tx_aggr[cnt] = false;
1487                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1488                         rsta->seq_start[cnt] = 0;
1489                 if (!sta_exist) {
1490                         rsi_dbg(INFO_ZONE, "New Station\n");
1491
1492                         /* Send peer notify to device */
1493                         rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1494                         rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1495                                               sta->addr, sta->wme, sta->aid,
1496                                               sta, sta_idx, 0, vif);
1497
1498                         if (common->key) {
1499                                 struct ieee80211_key_conf *key = common->key;
1500
1501                                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1502                                     (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1503                                         rsi_hal_load_key(adapter->priv,
1504                                                          key->key,
1505                                                          key->keylen,
1506                                                          RSI_PAIRWISE_KEY,
1507                                                          key->keyidx,
1508                                                          key->cipher,
1509                                                          sta_idx,
1510                                                          vif);
1511                         }
1512
1513                         common->num_stations++;
1514                 }
1515         }
1516
1517         if ((vif->type == NL80211_IFTYPE_STATION) ||
1518             (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1519                 rsi_set_min_rate(hw, sta, common);
1520                 if (sta->ht_cap.ht_supported) {
1521                         common->vif_info[0].is_ht = true;
1522                         common->bitrate_mask[NL80211_BAND_2GHZ] =
1523                                         sta->supp_rates[NL80211_BAND_2GHZ];
1524                         if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1525                             (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1526                                 common->vif_info[0].sgi = true;
1527                         ieee80211_start_tx_ba_session(sta, 0, 0);
1528                 }
1529         }
1530
1531 unlock:
1532         mutex_unlock(&common->mutex);
1533
1534         return status;
1535 }
1536
1537 /**
1538  * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1539  *                             getting disconnected.
1540  * @hw: Pointer to the ieee80211_hw structure.
1541  * @vif: Pointer to the ieee80211_vif structure.
1542  * @sta: Pointer to the ieee80211_sta structure.
1543  *
1544  * Return: 0 on success, negative error codes on failure.
1545  */
1546 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1547                                    struct ieee80211_vif *vif,
1548                                    struct ieee80211_sta *sta)
1549 {
1550         struct rsi_hw *adapter = hw->priv;
1551         struct rsi_common *common = adapter->priv;
1552         struct ieee80211_bss_conf *bss = &vif->bss_conf;
1553         struct rsi_sta *rsta;
1554
1555         rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1556
1557         mutex_lock(&common->mutex);
1558
1559         if ((vif->type == NL80211_IFTYPE_AP) ||
1560             (vif->type == NL80211_IFTYPE_P2P_GO)) {
1561                 u8 sta_idx, cnt;
1562
1563                 /* Send peer notify to device */
1564                 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1565                 for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1566                         rsta = &common->stations[sta_idx];
1567
1568                         if (!rsta->sta)
1569                                 continue;
1570                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1571                                 rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1572                                                       sta->addr, sta->wme,
1573                                                       sta->aid, sta, sta_idx,
1574                                                       0, vif);
1575                                 rsta->sta = NULL;
1576                                 rsta->sta_id = -1;
1577                                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1578                                         rsta->start_tx_aggr[cnt] = false;
1579                                 if (common->num_stations > 0)
1580                                         common->num_stations--;
1581                                 break;
1582                         }
1583                 }
1584                 if (sta_idx >= common->max_stations)
1585                         rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1586         }
1587
1588         if ((vif->type == NL80211_IFTYPE_STATION) ||
1589             (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1590                 /* Resetting all the fields to default values */
1591                 memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1592                 bss->qos = sta->wme;
1593                 common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1594                 common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1595                 common->min_rate = 0xffff;
1596                 common->vif_info[0].is_ht = false;
1597                 common->vif_info[0].sgi = false;
1598                 common->vif_info[0].seq_start = 0;
1599                 common->secinfo.ptk_cipher = 0;
1600                 common->secinfo.gtk_cipher = 0;
1601                 if (!common->iface_down)
1602                         rsi_send_rx_filter_frame(common, 0);
1603         }
1604         mutex_unlock(&common->mutex);
1605
1606         return 0;
1607 }
1608
1609 /**
1610  * rsi_mac80211_set_antenna() - This function is used to configure
1611  *                              tx and rx antennas.
1612  * @hw: Pointer to the ieee80211_hw structure.
1613  * @tx_ant: Bitmap for tx antenna
1614  * @rx_ant: Bitmap for rx antenna
1615  *
1616  * Return: 0 on success, Negative error code on failure.
1617  */
1618 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1619                                     u32 tx_ant, u32 rx_ant)
1620 {
1621         struct rsi_hw *adapter = hw->priv;
1622         struct rsi_common *common = adapter->priv;
1623         u8 antenna = 0;
1624
1625         if (tx_ant > 1 || rx_ant > 1) {
1626                 rsi_dbg(ERR_ZONE,
1627                         "Invalid antenna selection (tx: %d, rx:%d)\n",
1628                         tx_ant, rx_ant);
1629                 rsi_dbg(ERR_ZONE,
1630                         "Use 0 for int_ant, 1 for ext_ant\n");
1631                 return -EINVAL;
1632         }
1633
1634         rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1635                         __func__, tx_ant, rx_ant);
1636
1637         mutex_lock(&common->mutex);
1638
1639         antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1640         if (common->ant_in_use != antenna)
1641                 if (rsi_set_antenna(common, antenna))
1642                         goto fail_set_antenna;
1643
1644         rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1645                 tx_ant ? "UFL" : "INT");
1646
1647         common->ant_in_use = antenna;
1648
1649         mutex_unlock(&common->mutex);
1650
1651         return 0;
1652
1653 fail_set_antenna:
1654         rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1655         mutex_unlock(&common->mutex);
1656         return -EINVAL;
1657 }
1658
1659 /**
1660  * rsi_mac80211_get_antenna() - This function is used to configure
1661  *                              tx and rx antennas.
1662  *
1663  * @hw: Pointer to the ieee80211_hw structure.
1664  * @tx_ant: Bitmap for tx antenna
1665  * @rx_ant: Bitmap for rx antenna
1666  *
1667  * Return: 0 on success, negative error codes on failure.
1668  */
1669 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1670                                     u32 *tx_ant, u32 *rx_ant)
1671 {
1672         struct rsi_hw *adapter = hw->priv;
1673         struct rsi_common *common = adapter->priv;
1674
1675         mutex_lock(&common->mutex);
1676
1677         *tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1678         *rx_ant = 0;
1679
1680         mutex_unlock(&common->mutex);
1681
1682         return 0;
1683 }
1684
1685 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1686 {
1687         switch (region_code) {
1688         case NL80211_DFS_FCC:
1689                 return RSI_REGION_FCC;
1690         case NL80211_DFS_ETSI:
1691                 return RSI_REGION_ETSI;
1692         case NL80211_DFS_JP:
1693                 return RSI_REGION_TELEC;
1694         case NL80211_DFS_UNSET:
1695                 return RSI_REGION_WORLD;
1696         }
1697         return RSI_REGION_WORLD;
1698 }
1699
1700 static void rsi_reg_notify(struct wiphy *wiphy,
1701                            struct regulatory_request *request)
1702 {
1703         struct ieee80211_supported_band *sband;
1704         struct ieee80211_channel *ch;
1705         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1706         struct rsi_hw * adapter = hw->priv;
1707         struct rsi_common *common = adapter->priv;
1708         int i;
1709
1710         mutex_lock(&common->mutex);
1711
1712         rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1713                 request->alpha2, request->dfs_region);
1714
1715         if (common->num_supp_bands > 1) {
1716                 sband = wiphy->bands[NL80211_BAND_5GHZ];
1717
1718                 for (i = 0; i < sband->n_channels; i++) {
1719                         ch = &sband->channels[i];
1720                         if (ch->flags & IEEE80211_CHAN_DISABLED)
1721                                 continue;
1722
1723                         if (ch->flags & IEEE80211_CHAN_RADAR)
1724                                 ch->flags |= IEEE80211_CHAN_NO_IR;
1725                 }
1726         }
1727         adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1728         rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1729
1730         adapter->country[0] = request->alpha2[0];
1731         adapter->country[1] = request->alpha2[1];
1732
1733         mutex_unlock(&common->mutex);
1734 }
1735
1736 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1737 {
1738         struct rsi_hw *adapter = hw->priv;
1739         struct rsi_common *common = adapter->priv;
1740
1741         mutex_lock(&common->mutex);
1742         if (common->fsm_state != FSM_MAC_INIT_DONE)
1743                 wiphy_rfkill_set_hw_state(hw->wiphy, true);
1744         else
1745                 wiphy_rfkill_set_hw_state(hw->wiphy, false);
1746         mutex_unlock(&common->mutex);
1747 }
1748
1749 static void rsi_resume_conn_channel(struct rsi_common *common)
1750 {
1751         struct rsi_hw *adapter = common->priv;
1752         struct ieee80211_vif *vif;
1753         int cnt;
1754
1755         for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1756                 vif = adapter->vifs[cnt];
1757                 if (!vif)
1758                         continue;
1759
1760                 if ((vif->type == NL80211_IFTYPE_AP) ||
1761                     (vif->type == NL80211_IFTYPE_P2P_GO)) {
1762                         rsi_switch_channel(adapter, vif);
1763                         break;
1764                 }
1765                 if (((vif->type == NL80211_IFTYPE_STATION) ||
1766                      (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1767                     vif->bss_conf.assoc) {
1768                         rsi_switch_channel(adapter, vif);
1769                         break;
1770                 }
1771         }
1772 }
1773
1774 void rsi_roc_timeout(struct timer_list *t)
1775 {
1776         struct rsi_common *common = from_timer(common, t, roc_timer);
1777
1778         rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1779
1780         mutex_lock(&common->mutex);
1781         ieee80211_remain_on_channel_expired(common->priv->hw);
1782
1783         if (timer_pending(&common->roc_timer))
1784                 del_timer(&common->roc_timer);
1785
1786         rsi_resume_conn_channel(common);
1787         mutex_unlock(&common->mutex);
1788 }
1789
1790 static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1791                             struct ieee80211_channel *chan, int duration,
1792                             enum ieee80211_roc_type type)
1793 {
1794         struct rsi_hw *adapter = (struct rsi_hw *)hw->priv;
1795         struct rsi_common *common = (struct rsi_common *)adapter->priv;
1796         int status = 0;
1797
1798         rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1799
1800         mutex_lock(&common->mutex);
1801         rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1802                 __func__, chan->hw_value, duration);
1803
1804         if (timer_pending(&common->roc_timer)) {
1805                 rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1806                 del_timer(&common->roc_timer);
1807         }
1808         common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1809         add_timer(&common->roc_timer);
1810
1811         /* Configure band */
1812         if (rsi_band_check(common, chan)) {
1813                 rsi_dbg(ERR_ZONE, "Failed to set band\n");
1814                 status = -EINVAL;
1815                 goto out;
1816         }
1817
1818         /* Configure channel */
1819         if (rsi_set_channel(common, chan)) {
1820                 rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1821                 status = -EINVAL;
1822                 goto out;
1823         }
1824
1825         common->roc_vif = vif;
1826         ieee80211_ready_on_channel(hw);
1827         rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1828                 __func__, chan->hw_value);
1829
1830 out:
1831         mutex_unlock(&common->mutex);
1832
1833         return status;
1834 }
1835
1836 static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw,
1837                                    struct ieee80211_vif *vif)
1838 {
1839         struct rsi_hw *adapter = hw->priv;
1840         struct rsi_common *common = adapter->priv;
1841
1842         rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1843
1844         mutex_lock(&common->mutex);
1845         if (!timer_pending(&common->roc_timer)) {
1846                 mutex_unlock(&common->mutex);
1847                 return 0;
1848         }
1849
1850         del_timer(&common->roc_timer);
1851
1852         rsi_resume_conn_channel(common);
1853         mutex_unlock(&common->mutex);
1854
1855         return 0;
1856 }
1857
1858 #ifdef CONFIG_PM
1859 static const struct wiphy_wowlan_support rsi_wowlan_support = {
1860         .flags = WIPHY_WOWLAN_ANY |
1861                  WIPHY_WOWLAN_MAGIC_PKT |
1862                  WIPHY_WOWLAN_DISCONNECT |
1863                  WIPHY_WOWLAN_GTK_REKEY_FAILURE  |
1864                  WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1865                  WIPHY_WOWLAN_EAP_IDENTITY_REQ   |
1866                  WIPHY_WOWLAN_4WAY_HANDSHAKE,
1867 };
1868
1869 static u16 rsi_wow_map_triggers(struct rsi_common *common,
1870                                 struct cfg80211_wowlan *wowlan)
1871 {
1872         u16 wow_triggers = 0;
1873
1874         rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1875
1876         if (wowlan->any)
1877                 wow_triggers |= RSI_WOW_ANY;
1878         if (wowlan->magic_pkt)
1879                 wow_triggers |= RSI_WOW_MAGIC_PKT;
1880         if (wowlan->disconnect)
1881                 wow_triggers |= RSI_WOW_DISCONNECT;
1882         if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1883             wowlan->four_way_handshake)
1884                 wow_triggers |= RSI_WOW_GTK_REKEY;
1885
1886         return wow_triggers;
1887 }
1888
1889 int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1890 {
1891         struct rsi_common *common = adapter->priv;
1892         u16 triggers = 0;
1893         u16 rx_filter_word = 0;
1894         struct ieee80211_bss_conf *bss = NULL;
1895
1896         rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1897
1898         if (!adapter->vifs[0])
1899                 return -EINVAL;
1900
1901         bss = &adapter->vifs[0]->bss_conf;
1902
1903         if (WARN_ON(!wowlan)) {
1904                 rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1905                 return -EINVAL;
1906         }
1907
1908         common->wow_flags |= RSI_WOW_ENABLED;
1909         triggers = rsi_wow_map_triggers(common, wowlan);
1910         if (!triggers) {
1911                 rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1912                 return -EINVAL;
1913         }
1914         if (!bss->assoc) {
1915                 rsi_dbg(ERR_ZONE,
1916                         "Cannot configure WoWLAN (Station not connected)\n");
1917                 common->wow_flags |= RSI_WOW_NO_CONNECTION;
1918                 return 0;
1919         }
1920         rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1921
1922         if (common->coex_mode > 1)
1923                 rsi_disable_ps(adapter, adapter->vifs[0]);
1924
1925         rsi_send_wowlan_request(common, triggers, 1);
1926
1927         /**
1928          * Increase the beacon_miss threshold & keep-alive timers in
1929          * vap_update frame
1930          */
1931         rsi_send_vap_dynamic_update(common);
1932
1933         rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1934         rsi_send_rx_filter_frame(common, rx_filter_word);
1935
1936         return 0;
1937 }
1938 EXPORT_SYMBOL(rsi_config_wowlan);
1939
1940 static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1941                                 struct cfg80211_wowlan *wowlan)
1942 {
1943         struct rsi_hw *adapter = hw->priv;
1944         struct rsi_common *common = adapter->priv;
1945
1946         rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1947         mutex_lock(&common->mutex);
1948         if (rsi_config_wowlan(adapter, wowlan)) {
1949                 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1950                 mutex_unlock(&common->mutex);
1951                 return 1;
1952         }
1953         mutex_unlock(&common->mutex);
1954
1955         return 0;
1956 }
1957
1958 static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1959 {
1960         u16 rx_filter_word = 0;
1961         struct rsi_hw *adapter = hw->priv;
1962         struct rsi_common *common = adapter->priv;
1963
1964         common->wow_flags = 0;
1965
1966         rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1967
1968         if (common->hibernate_resume) {
1969                 common->mac_ops_resumed = true;
1970                 /* Device need a complete restart of all MAC operations.
1971                  * returning 1 will serve this purpose.
1972                  */
1973                 return 1;
1974         }
1975
1976         mutex_lock(&common->mutex);
1977         rsi_send_wowlan_request(common, 0, 0);
1978
1979         rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1980                           ALLOW_MGMT_ASSOC_PEER);
1981         rsi_send_rx_filter_frame(common, rx_filter_word);
1982         mutex_unlock(&common->mutex);
1983
1984         return 0;
1985 }
1986
1987 #endif
1988
1989 static const struct ieee80211_ops mac80211_ops = {
1990         .tx = rsi_mac80211_tx,
1991         .start = rsi_mac80211_start,
1992         .stop = rsi_mac80211_stop,
1993         .add_interface = rsi_mac80211_add_interface,
1994         .remove_interface = rsi_mac80211_remove_interface,
1995         .config = rsi_mac80211_config,
1996         .bss_info_changed = rsi_mac80211_bss_info_changed,
1997         .conf_tx = rsi_mac80211_conf_tx,
1998         .configure_filter = rsi_mac80211_conf_filter,
1999         .set_key = rsi_mac80211_set_key,
2000         .set_rts_threshold = rsi_mac80211_set_rts_threshold,
2001         .set_bitrate_mask = rsi_mac80211_set_rate_mask,
2002         .ampdu_action = rsi_mac80211_ampdu_action,
2003         .sta_add = rsi_mac80211_sta_add,
2004         .sta_remove = rsi_mac80211_sta_remove,
2005         .set_antenna = rsi_mac80211_set_antenna,
2006         .get_antenna = rsi_mac80211_get_antenna,
2007         .rfkill_poll = rsi_mac80211_rfkill_poll,
2008         .remain_on_channel = rsi_mac80211_roc,
2009         .cancel_remain_on_channel = rsi_mac80211_cancel_roc,
2010 #ifdef CONFIG_PM
2011         .suspend = rsi_mac80211_suspend,
2012         .resume  = rsi_mac80211_resume,
2013 #endif
2014         .hw_scan = rsi_mac80211_hw_scan_start,
2015         .cancel_hw_scan = rsi_mac80211_cancel_hw_scan,
2016 };
2017
2018 /**
2019  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
2020  * @common: Pointer to the driver private structure.
2021  *
2022  * Return: 0 on success, negative error codes on failure.
2023  */
2024 int rsi_mac80211_attach(struct rsi_common *common)
2025 {
2026         int status = 0;
2027         struct ieee80211_hw *hw = NULL;
2028         struct wiphy *wiphy = NULL;
2029         struct rsi_hw *adapter = common->priv;
2030         u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
2031
2032         rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
2033
2034         hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
2035         if (!hw) {
2036                 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
2037                 return -ENOMEM;
2038         }
2039
2040         wiphy = hw->wiphy;
2041
2042         SET_IEEE80211_DEV(hw, adapter->device);
2043
2044         hw->priv = adapter;
2045         adapter->hw = hw;
2046
2047         ieee80211_hw_set(hw, SIGNAL_DBM);
2048         ieee80211_hw_set(hw, HAS_RATE_CONTROL);
2049         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2050         ieee80211_hw_set(hw, SUPPORTS_PS);
2051         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
2052
2053         hw->queues = MAX_HW_QUEUES;
2054         hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
2055
2056         hw->max_rates = 1;
2057         hw->max_rate_tries = MAX_RETRIES;
2058         hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
2059         hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
2060
2061         hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
2062         hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
2063         hw->rate_control_algorithm = "AARF";
2064
2065         SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
2066         ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
2067
2068         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2069                                  BIT(NL80211_IFTYPE_AP) |
2070                                  BIT(NL80211_IFTYPE_P2P_DEVICE) |
2071                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
2072                                  BIT(NL80211_IFTYPE_P2P_GO);
2073
2074         wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
2075         wiphy->retry_short = RETRY_SHORT;
2076         wiphy->retry_long  = RETRY_LONG;
2077         wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
2078         wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
2079         wiphy->flags = 0;
2080
2081         wiphy->available_antennas_rx = 1;
2082         wiphy->available_antennas_tx = 1;
2083
2084         status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
2085         if (status)
2086                 return status;
2087         wiphy->bands[NL80211_BAND_2GHZ] =
2088                 &adapter->sbands[NL80211_BAND_2GHZ];
2089         if (common->num_supp_bands > 1) {
2090                 status = rsi_register_rates_channels(adapter,
2091                                                      NL80211_BAND_5GHZ);
2092                 if (status)
2093                         return status;
2094                 wiphy->bands[NL80211_BAND_5GHZ] =
2095                         &adapter->sbands[NL80211_BAND_5GHZ];
2096         }
2097
2098         /* AP Parameters */
2099         wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2100         common->max_stations = wiphy->max_ap_assoc_sta;
2101         rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2102         hw->sta_data_size = sizeof(struct rsi_sta);
2103
2104         wiphy->max_scan_ssids = RSI_MAX_SCAN_SSIDS;
2105         wiphy->max_scan_ie_len = RSI_MAX_SCAN_IE_LEN;
2106         wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2107         wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2108         wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2109         wiphy->reg_notifier = rsi_reg_notify;
2110
2111 #ifdef CONFIG_PM
2112         wiphy->wowlan = &rsi_wowlan_support;
2113 #endif
2114
2115         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2116
2117         /* Wi-Fi direct parameters */
2118         wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2119         wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2120         wiphy->max_remain_on_channel_duration = 10000;
2121         hw->max_listen_interval = 10;
2122         wiphy->iface_combinations = rsi_iface_combinations;
2123         wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2124
2125         if (common->coex_mode > 1)
2126                 wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2127
2128         status = ieee80211_register_hw(hw);
2129         if (status)
2130                 return status;
2131
2132         return rsi_init_dbgfs(adapter);
2133 }