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