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_common.h"
  21 #include "rsi_ps.h"
  22
  23 static const struct ieee80211_channel rsi_2ghz_channels[] = {
  24         { .band = NL80211_BAND_2GHZ, .center_freq = 2412,
  25           .hw_value = 1 }, /* Channel 1 */
  26         { .band = NL80211_BAND_2GHZ, .center_freq = 2417,
  27           .hw_value = 2 }, /* Channel 2 */
  28         { .band = NL80211_BAND_2GHZ, .center_freq = 2422,
  29           .hw_value = 3 }, /* Channel 3 */
  30         { .band = NL80211_BAND_2GHZ, .center_freq = 2427,
  31           .hw_value = 4 }, /* Channel 4 */
  32         { .band = NL80211_BAND_2GHZ, .center_freq = 2432,
  33           .hw_value = 5 }, /* Channel 5 */
  34         { .band = NL80211_BAND_2GHZ, .center_freq = 2437,
  35           .hw_value = 6 }, /* Channel 6 */
  36         { .band = NL80211_BAND_2GHZ, .center_freq = 2442,
  37           .hw_value = 7 }, /* Channel 7 */
  38         { .band = NL80211_BAND_2GHZ, .center_freq = 2447,
  39           .hw_value = 8 }, /* Channel 8 */
  40         { .band = NL80211_BAND_2GHZ, .center_freq = 2452,
  41           .hw_value = 9 }, /* Channel 9 */
  42         { .band = NL80211_BAND_2GHZ, .center_freq = 2457,
  43           .hw_value = 10 }, /* Channel 10 */
  44         { .band = NL80211_BAND_2GHZ, .center_freq = 2462,
  45           .hw_value = 11 }, /* Channel 11 */
  46         { .band = NL80211_BAND_2GHZ, .center_freq = 2467,
  47           .hw_value = 12 }, /* Channel 12 */
  48         { .band = NL80211_BAND_2GHZ, .center_freq = 2472,
  49           .hw_value = 13 }, /* Channel 13 */
  50         { .band = NL80211_BAND_2GHZ, .center_freq = 2484,
  51           .hw_value = 14 }, /* Channel 14 */
  52 };
  53
  54 static const struct ieee80211_channel rsi_5ghz_channels[] = {
  55         { .band = NL80211_BAND_5GHZ, .center_freq = 5180,
  56           .hw_value = 36,  }, /* Channel 36 */
  57         { .band = NL80211_BAND_5GHZ, .center_freq = 5200,
  58           .hw_value = 40, }, /* Channel 40 */
  59         { .band = NL80211_BAND_5GHZ, .center_freq = 5220,
  60           .hw_value = 44, }, /* Channel 44 */
  61         { .band = NL80211_BAND_5GHZ, .center_freq = 5240,
  62           .hw_value = 48, }, /* Channel 48 */
  63         { .band = NL80211_BAND_5GHZ, .center_freq = 5260,
  64           .hw_value = 52, }, /* Channel 52 */
  65         { .band = NL80211_BAND_5GHZ, .center_freq = 5280,
  66           .hw_value = 56, }, /* Channel 56 */
  67         { .band = NL80211_BAND_5GHZ, .center_freq = 5300,
  68           .hw_value = 60, }, /* Channel 60 */
  69         { .band = NL80211_BAND_5GHZ, .center_freq = 5320,
  70           .hw_value = 64, }, /* Channel 64 */
  71         { .band = NL80211_BAND_5GHZ, .center_freq = 5500,
  72           .hw_value = 100, }, /* Channel 100 */
  73         { .band = NL80211_BAND_5GHZ, .center_freq = 5520,
  74           .hw_value = 104, }, /* Channel 104 */
  75         { .band = NL80211_BAND_5GHZ, .center_freq = 5540,
  76           .hw_value = 108, }, /* Channel 108 */
  77         { .band = NL80211_BAND_5GHZ, .center_freq = 5560,
  78           .hw_value = 112, }, /* Channel 112 */
  79         { .band = NL80211_BAND_5GHZ, .center_freq = 5580,
  80           .hw_value = 116, }, /* Channel 116 */
  81         { .band = NL80211_BAND_5GHZ, .center_freq = 5600,
  82           .hw_value = 120, }, /* Channel 120 */
  83         { .band = NL80211_BAND_5GHZ, .center_freq = 5620,
  84           .hw_value = 124, }, /* Channel 124 */
  85         { .band = NL80211_BAND_5GHZ, .center_freq = 5640,
  86           .hw_value = 128, }, /* Channel 128 */
  87         { .band = NL80211_BAND_5GHZ, .center_freq = 5660,
  88           .hw_value = 132, }, /* Channel 132 */
  89         { .band = NL80211_BAND_5GHZ, .center_freq = 5680,
  90           .hw_value = 136, }, /* Channel 136 */
  91         { .band = NL80211_BAND_5GHZ, .center_freq = 5700,
  92           .hw_value = 140, }, /* Channel 140 */
  93         { .band = NL80211_BAND_5GHZ, .center_freq = 5745,
  94           .hw_value = 149, }, /* Channel 149 */
  95         { .band = NL80211_BAND_5GHZ, .center_freq = 5765,
  96           .hw_value = 153, }, /* Channel 153 */
  97         { .band = NL80211_BAND_5GHZ, .center_freq = 5785,
  98           .hw_value = 157, }, /* Channel 157 */
  99         { .band = NL80211_BAND_5GHZ, .center_freq = 5805,
 100           .hw_value = 161, }, /* Channel 161 */
 101         { .band = NL80211_BAND_5GHZ, .center_freq = 5825,
 102           .hw_value = 165, }, /* Channel 165 */
 103 };
 104
 105 struct ieee80211_rate rsi_rates[12] = {
 106         { .bitrate = STD_RATE_01  * 5, .hw_value = RSI_RATE_1 },
 107         { .bitrate = STD_RATE_02  * 5, .hw_value = RSI_RATE_2 },
 108         { .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 },
 109         { .bitrate = STD_RATE_11  * 5, .hw_value = RSI_RATE_11 },
 110         { .bitrate = STD_RATE_06  * 5, .hw_value = RSI_RATE_6 },
 111         { .bitrate = STD_RATE_09  * 5, .hw_value = RSI_RATE_9 },
 112         { .bitrate = STD_RATE_12  * 5, .hw_value = RSI_RATE_12 },
 113         { .bitrate = STD_RATE_18  * 5, .hw_value = RSI_RATE_18 },
 114         { .bitrate = STD_RATE_24  * 5, .hw_value = RSI_RATE_24 },
 115         { .bitrate = STD_RATE_36  * 5, .hw_value = RSI_RATE_36 },
 116         { .bitrate = STD_RATE_48  * 5, .hw_value = RSI_RATE_48 },
 117         { .bitrate = STD_RATE_54  * 5, .hw_value = RSI_RATE_54 },
 118 };
 119
 120 const u16 rsi_mcsrates[8] = {
 121         RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3,
 122         RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7
 123 };
 124
 125 static const u32 rsi_max_ap_stas[16] = {
 126         32,     /* 1 - Wi-Fi alone */
 127         0,      /* 2 */
 128         0,      /* 3 */
 129         0,      /* 4 - BT EDR alone */
 130         4,      /* 5 - STA + BT EDR */
 131         32,     /* 6 - AP + BT EDR */
 132         0,      /* 7 */
 133         0,      /* 8 - BT LE alone */
 134         4,      /* 9 - STA + BE LE */
 135         0,      /* 10 */
 136         0,      /* 11 */
 137         0,      /* 12 */
 138         1,      /* 13 - STA + BT Dual */
 139         4,      /* 14 - AP + BT Dual */
 140 };
 141
 142 /**
 143  * rsi_is_cipher_wep() -  This function determines if the cipher is WEP or not.
 144  * @common: Pointer to the driver private structure.
 145  *
 146  * Return: If cipher type is WEP, a value of 1 is returned, else 0.
 147  */
 148
 149 bool rsi_is_cipher_wep(struct rsi_common *common)
 150 {
 151         if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) ||
 152              (common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) &&
 153             (!common->secinfo.ptk_cipher))
 154                 return true;
 155         else
 156                 return false;
 157 }
 158
 159 /**
 160  * rsi_register_rates_channels() - This function registers channels and rates.
 161  * @adapter: Pointer to the adapter structure.
 162  * @band: Operating band to be set.
 163  *
 164  * Return: None.
 165  */
 166 static void rsi_register_rates_channels(struct rsi_hw *adapter, int band)
 167 {
 168         struct ieee80211_supported_band *sbands = &adapter->sbands[band];
 169         void *channels = NULL;
 170
 171         if (band == NL80211_BAND_2GHZ) {
 172                 channels = kmalloc(sizeof(rsi_2ghz_channels), GFP_KERNEL);
 173                 memcpy(channels,
 174                        rsi_2ghz_channels,
 175                        sizeof(rsi_2ghz_channels));
 176                 sbands->band = NL80211_BAND_2GHZ;
 177                 sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels);
 178                 sbands->bitrates = rsi_rates;
 179                 sbands->n_bitrates = ARRAY_SIZE(rsi_rates);
 180         } else {
 181                 channels = kmalloc(sizeof(rsi_5ghz_channels), GFP_KERNEL);
 182                 memcpy(channels,
 183                        rsi_5ghz_channels,
 184                        sizeof(rsi_5ghz_channels));
 185                 sbands->band = NL80211_BAND_5GHZ;
 186                 sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels);
 187                 sbands->bitrates = &rsi_rates[4];
 188                 sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4;
 189         }
 190
 191         sbands->channels = channels;
 192
 193         memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap));
 194         sbands->ht_cap.ht_supported = true;
 195         sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 196                               IEEE80211_HT_CAP_SGI_20 |
 197                               IEEE80211_HT_CAP_SGI_40);
 198         sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K;
 199         sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
 200         sbands->ht_cap.mcs.rx_mask[0] = 0xff;
 201         sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 202         /* sbands->ht_cap.mcs.rx_highest = 0x82; */
 203 }
 204
 205 /**
 206  * rsi_mac80211_detach() - This function is used to de-initialize the
 207  *                         Mac80211 stack.
 208  * @adapter: Pointer to the adapter structure.
 209  *
 210  * Return: None.
 211  */
 212 void rsi_mac80211_detach(struct rsi_hw *adapter)
 213 {
 214         struct ieee80211_hw *hw = adapter->hw;
 215         enum nl80211_band band;
 216
 217         if (hw) {
 218                 ieee80211_stop_queues(hw);
 219                 ieee80211_unregister_hw(hw);
 220                 ieee80211_free_hw(hw);
 221                 adapter->hw = NULL;
 222         }
 223
 224         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 225                 struct ieee80211_supported_band *sband =
 226                                         &adapter->sbands[band];
 227
 228                 kfree(sband->channels);
 229         }
 230
 231 #ifdef CONFIG_RSI_DEBUGFS
 232         rsi_remove_dbgfs(adapter);
 233         kfree(adapter->dfsentry);
 234 #endif
 235 }
 236 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
 237
 238 /**
 239  * rsi_indicate_tx_status() - This function indicates the transmit status.
 240  * @adapter: Pointer to the adapter structure.
 241  * @skb: Pointer to the socket buffer structure.
 242  * @status: Status
 243  *
 244  * Return: None.
 245  */
 246 void rsi_indicate_tx_status(struct rsi_hw *adapter,
 247                             struct sk_buff *skb,
 248                             int status)
 249 {
 250         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 251         struct skb_info *tx_params;
 252
 253         if (!adapter->hw) {
 254                 rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
 255                 return;
 256         }
 257
 258         if (!status)
 259                 info->flags |= IEEE80211_TX_STAT_ACK;
 260
 261         tx_params = (struct skb_info *)info->driver_data;
 262         skb_pull(skb, tx_params->internal_hdr_size);
 263         memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
 264
 265         ieee80211_tx_status_irqsafe(adapter->hw, skb);
 266 }
 267
 268 /**
 269  * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
 270  *                     transmitted frame.SKB contains the buffer starting
 271  *                     from the IEEE 802.11 header.
 272  * @hw: Pointer to the ieee80211_hw structure.
 273  * @control: Pointer to the ieee80211_tx_control structure
 274  * @skb: Pointer to the socket buffer structure.
 275  *
 276  * Return: None
 277  */
 278 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
 279                             struct ieee80211_tx_control *control,
 280                             struct sk_buff *skb)
 281 {
 282         struct rsi_hw *adapter = hw->priv;
 283         struct rsi_common *common = adapter->priv;
 284
 285         rsi_core_xmit(common, skb);
 286 }
 287
 288 /**
 289  * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
 290  *                        the driver init is complete by then, just
 291  *                        returns success.
 292  * @hw: Pointer to the ieee80211_hw structure.
 293  *
 294  * Return: 0 as success.
 295  */
 296 static int rsi_mac80211_start(struct ieee80211_hw *hw)
 297 {
 298         struct rsi_hw *adapter = hw->priv;
 299         struct rsi_common *common = adapter->priv;
 300
 301         rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
 302         mutex_lock(&common->mutex);
 303         common->iface_down = false;
 304         wiphy_rfkill_start_polling(hw->wiphy);
 305         rsi_send_rx_filter_frame(common, 0);
 306         mutex_unlock(&common->mutex);
 307
 308         return 0;
 309 }
 310
 311 /**
 312  * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
 313  * @hw: Pointer to the ieee80211_hw structure.
 314  *
 315  * Return: None.
 316  */
 317 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
 318 {
 319         struct rsi_hw *adapter = hw->priv;
 320         struct rsi_common *common = adapter->priv;
 321
 322         rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
 323         mutex_lock(&common->mutex);
 324         common->iface_down = true;
 325         wiphy_rfkill_stop_polling(hw->wiphy);
 326
 327         /* Block all rx frames */
 328         rsi_send_rx_filter_frame(common, 0xffff);
 329
 330         mutex_unlock(&common->mutex);
 331 }
 332
 333 /**
 334  * rsi_mac80211_add_interface() - This function is called when a netdevice
 335  *                                attached to the hardware is enabled.
 336  * @hw: Pointer to the ieee80211_hw structure.
 337  * @vif: Pointer to the ieee80211_vif structure.
 338  *
 339  * Return: ret: 0 on success, negative error code on failure.
 340  */
 341 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
 342                                       struct ieee80211_vif *vif)
 343 {
 344         struct rsi_hw *adapter = hw->priv;
 345         struct rsi_common *common = adapter->priv;
 346         enum opmode intf_mode;
 347         int ret = -EOPNOTSUPP;
 348
 349         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
 350         mutex_lock(&common->mutex);
 351
 352         if (adapter->sc_nvifs > 1) {
 353                 mutex_unlock(&common->mutex);
 354                 return -EOPNOTSUPP;
 355         }
 356
 357         switch (vif->type) {
 358         case NL80211_IFTYPE_STATION:
 359                 rsi_dbg(INFO_ZONE, "Station Mode");
 360                 intf_mode = STA_OPMODE;
 361                 break;
 362         case NL80211_IFTYPE_AP:
 363                 rsi_dbg(INFO_ZONE, "AP Mode");
 364                 intf_mode = AP_OPMODE;
 365                 break;
 366         default:
 367                 rsi_dbg(ERR_ZONE,
 368                         "%s: Interface type %d not supported\n", __func__,
 369                         vif->type);
 370                 goto out;
 371         }
 372
 373         adapter->vifs[adapter->sc_nvifs++] = vif;
 374         ret = rsi_set_vap_capabilities(common, intf_mode, common->mac_addr,
 375                                        0, VAP_ADD);
 376         if (ret) {
 377                 rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
 378                 goto out;
 379         }
 380
 381         if (vif->type == NL80211_IFTYPE_AP) {
 382                 int i;
 383
 384                 rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
 385                 common->min_rate = RSI_RATE_AUTO;
 386                 for (i = 0; i < common->max_stations; i++)
 387                         common->stations[i].sta = NULL;
 388         }
 389
 390 out:
 391         mutex_unlock(&common->mutex);
 392
 393         return ret;
 394 }
 395
 396 /**
 397  * rsi_mac80211_remove_interface() - This function notifies driver that an
 398  *                                   interface is going down.
 399  * @hw: Pointer to the ieee80211_hw structure.
 400  * @vif: Pointer to the ieee80211_vif structure.
 401  *
 402  * Return: None.
 403  */
 404 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
 405                                           struct ieee80211_vif *vif)
 406 {
 407         struct rsi_hw *adapter = hw->priv;
 408         struct rsi_common *common = adapter->priv;
 409         enum opmode opmode;
 410
 411         rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
 412
 413         mutex_lock(&common->mutex);
 414
 415         if (adapter->sc_nvifs <= 0) {
 416                 mutex_unlock(&common->mutex);
 417                 return;
 418         }
 419
 420         switch (vif->type) {
 421         case NL80211_IFTYPE_STATION:
 422                 opmode = STA_OPMODE;
 423                 break;
 424         case NL80211_IFTYPE_AP:
 425                 opmode = AP_OPMODE;
 426                 break;
 427         default:
 428                 mutex_unlock(&common->mutex);
 429                 return;
 430         }
 431         rsi_set_vap_capabilities(common, opmode, vif->addr,
 432                                  0, VAP_DELETE);
 433         adapter->sc_nvifs--;
 434
 435         if (!memcmp(adapter->vifs[0], vif, sizeof(struct ieee80211_vif)))
 436                 adapter->vifs[0] = NULL;
 437         mutex_unlock(&common->mutex);
 438 }
 439
 440 /**
 441  * rsi_channel_change() - This function is a performs the checks
 442  *                        required for changing a channel and sets
 443  *                        the channel accordingly.
 444  * @hw: Pointer to the ieee80211_hw structure.
 445  *
 446  * Return: 0 on success, negative error code on failure.
 447  */
 448 static int rsi_channel_change(struct ieee80211_hw *hw)
 449 {
 450         struct rsi_hw *adapter = hw->priv;
 451         struct rsi_common *common = adapter->priv;
 452         int status = -EOPNOTSUPP;
 453         struct ieee80211_channel *curchan = hw->conf.chandef.chan;
 454         u16 channel = curchan->hw_value;
 455         struct ieee80211_bss_conf *bss = &adapter->vifs[0]->bss_conf;
 456
 457         rsi_dbg(INFO_ZONE,
 458                 "%s: Set channel: %d MHz type: %d channel_no %d\n",
 459                 __func__, curchan->center_freq,
 460                 curchan->flags, channel);
 461
 462         if (bss->assoc) {
 463                 if (!common->hw_data_qs_blocked &&
 464                     (rsi_get_connected_channel(adapter) != channel)) {
 465                         rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
 466                         if (!rsi_send_block_unblock_frame(common, true))
 467                                 common->hw_data_qs_blocked = true;
 468                 }
 469         }
 470
 471         status = rsi_band_check(common);
 472         if (!status)
 473                 status = rsi_set_channel(adapter->priv, curchan);
 474
 475         if (bss->assoc) {
 476                 if (common->hw_data_qs_blocked &&
 477                     (rsi_get_connected_channel(adapter) == channel)) {
 478                         rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 479                         if (!rsi_send_block_unblock_frame(common, false))
 480                                 common->hw_data_qs_blocked = false;
 481                 }
 482         } else {
 483                 if (common->hw_data_qs_blocked) {
 484                         rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 485                         if (!rsi_send_block_unblock_frame(common, false))
 486                                 common->hw_data_qs_blocked = false;
 487                 }
 488         }
 489
 490         return status;
 491 }
 492
 493 /**
 494  * rsi_config_power() - This function configures tx power to device
 495  * @hw: Pointer to the ieee80211_hw structure.
 496  *
 497  * Return: 0 on success, negative error code on failure.
 498  */
 499 static int rsi_config_power(struct ieee80211_hw *hw)
 500 {
 501         struct rsi_hw *adapter = hw->priv;
 502         struct rsi_common *common = adapter->priv;
 503         struct ieee80211_conf *conf = &hw->conf;
 504
 505         if (adapter->sc_nvifs <= 0) {
 506                 rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
 507                 return -EINVAL;
 508         }
 509
 510         rsi_dbg(INFO_ZONE,
 511                 "%s: Set tx power: %d dBM\n", __func__, conf->power_level);
 512
 513         if (conf->power_level == common->tx_power)
 514                 return 0;
 515
 516         common->tx_power = conf->power_level;
 517
 518         return rsi_send_radio_params_update(common);
 519 }
 520
 521 /**
 522  * rsi_mac80211_config() - This function is a handler for configuration
 523  *                         requests. The stack calls this function to
 524  *                         change hardware configuration, e.g., channel.
 525  * @hw: Pointer to the ieee80211_hw structure.
 526  * @changed: Changed flags set.
 527  *
 528  * Return: 0 on success, negative error code on failure.
 529  */
 530 static int rsi_mac80211_config(struct ieee80211_hw *hw,
 531                                u32 changed)
 532 {
 533         struct rsi_hw *adapter = hw->priv;
 534         struct rsi_common *common = adapter->priv;
 535         struct ieee80211_vif *vif = adapter->vifs[0];
 536         struct ieee80211_conf *conf = &hw->conf;
 537         int status = -EOPNOTSUPP;
 538
 539         mutex_lock(&common->mutex);
 540
 541         if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
 542                 status = rsi_channel_change(hw);
 543
 544         /* tx power */
 545         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 546                 rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
 547                 status = rsi_config_power(hw);
 548         }
 549
 550         /* Power save parameters */
 551         if ((changed & IEEE80211_CONF_CHANGE_PS) &&
 552             (vif->type == NL80211_IFTYPE_STATION)) {
 553                 unsigned long flags;
 554
 555                 spin_lock_irqsave(&adapter->ps_lock, flags);
 556                 if (conf->flags & IEEE80211_CONF_PS)
 557                         rsi_enable_ps(adapter);
 558                 else
 559                         rsi_disable_ps(adapter);
 560                 spin_unlock_irqrestore(&adapter->ps_lock, flags);
 561         }
 562
 563         /* RTS threshold */
 564         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 565                 rsi_dbg(INFO_ZONE, "RTS threshold\n");
 566                 if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
 567                         rsi_dbg(INFO_ZONE,
 568                                 "%s: Sending vap updates....\n", __func__);
 569                         status = rsi_send_vap_dynamic_update(common);
 570                 }
 571         }
 572         mutex_unlock(&common->mutex);
 573
 574         return status;
 575 }
 576
 577 /**
 578  * rsi_get_connected_channel() - This function is used to get the current
 579  *                               connected channel number.
 580  * @adapter: Pointer to the adapter structure.
 581  *
 582  * Return: Current connected AP's channel number is returned.
 583  */
 584 u16 rsi_get_connected_channel(struct rsi_hw *adapter)
 585 {
 586         struct ieee80211_vif *vif = adapter->vifs[0];
 587         if (vif) {
 588                 struct ieee80211_bss_conf *bss = &vif->bss_conf;
 589                 struct ieee80211_channel *channel = bss->chandef.chan;
 590                 return channel->hw_value;
 591         }
 592
 593         return 0;
 594 }
 595
 596 /**
 597  * rsi_mac80211_bss_info_changed() - This function is a handler for config
 598  *                                   requests related to BSS parameters that
 599  *                                   may vary during BSS's lifespan.
 600  * @hw: Pointer to the ieee80211_hw structure.
 601  * @vif: Pointer to the ieee80211_vif structure.
 602  * @bss_conf: Pointer to the ieee80211_bss_conf structure.
 603  * @changed: Changed flags set.
 604  *
 605  * Return: None.
 606  */
 607 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 608                                           struct ieee80211_vif *vif,
 609                                           struct ieee80211_bss_conf *bss_conf,
 610                                           u32 changed)
 611 {
 612         struct rsi_hw *adapter = hw->priv;
 613         struct rsi_common *common = adapter->priv;
 614         struct ieee80211_bss_conf *bss = &vif->bss_conf;
 615         struct ieee80211_conf *conf = &hw->conf;
 616         u16 rx_filter_word = 0;
 617
 618         mutex_lock(&common->mutex);
 619         if (changed & BSS_CHANGED_ASSOC) {
 620                 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
 621                         __func__, bss_conf->assoc);
 622                 if (bss_conf->assoc) {
 623                         /* Send the RX filter frame */
 624                         rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
 625                                           ALLOW_CTRL_ASSOC_PEER |
 626                                           ALLOW_MGMT_ASSOC_PEER);
 627                         rsi_send_rx_filter_frame(common, rx_filter_word);
 628                 }
 629                 rsi_inform_bss_status(common,
 630                                       STA_OPMODE,
 631                                       bss_conf->assoc,
 632                                       bss_conf->bssid,
 633                                       bss_conf->qos,
 634                                       bss_conf->aid,
 635                                       NULL, 0);
 636                 adapter->ps_info.dtim_interval_duration = bss->dtim_period;
 637                 adapter->ps_info.listen_interval = conf->listen_interval;
 638
 639         /* If U-APSD is updated, send ps parameters to firmware */
 640         if (bss->assoc) {
 641                 if (common->uapsd_bitmap) {
 642                         rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
 643                         rsi_conf_uapsd(adapter);
 644                 }
 645         } else {
 646                 common->uapsd_bitmap = 0;
 647         }
 648         }
 649
 650         if (changed & BSS_CHANGED_CQM) {
 651                 common->cqm_info.last_cqm_event_rssi = 0;
 652                 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
 653                 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
 654                 rsi_dbg(INFO_ZONE, "RSSI throld & hysteresis are: %d %d\n",
 655                         common->cqm_info.rssi_thold,
 656                         common->cqm_info.rssi_hyst);
 657         }
 658
 659         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
 660             (vif->type == NL80211_IFTYPE_AP)) {
 661                 if (bss->enable_beacon) {
 662                         rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
 663                         common->beacon_enabled = 1;
 664                 } else {
 665                         rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
 666                         common->beacon_enabled = 0;
 667                 }
 668         }
 669
 670         mutex_unlock(&common->mutex);
 671 }
 672
 673 /**
 674  * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
 675  * @hw: Pointer to the ieee80211_hw structure.
 676  * @changed: Changed flags set.
 677  * @total_flags: Total initial flags set.
 678  * @multicast: Multicast.
 679  *
 680  * Return: None.
 681  */
 682 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
 683                                      u32 changed_flags,
 684                                      u32 *total_flags,
 685                                      u64 multicast)
 686 {
 687         /* Not doing much here as of now */
 688         *total_flags &= RSI_SUPP_FILTERS;
 689 }
 690
 691 /**
 692  * rsi_mac80211_conf_tx() - This function configures TX queue parameters
 693  *                          (EDCF (aifs, cw_min, cw_max), bursting)
 694  *                          for a hardware TX queue.
 695  * @hw: Pointer to the ieee80211_hw structure
 696  * @vif: Pointer to the ieee80211_vif structure.
 697  * @queue: Queue number.
 698  * @params: Pointer to ieee80211_tx_queue_params structure.
 699  *
 700  * Return: 0 on success, negative error code on failure.
 701  */
 702 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
 703                                 struct ieee80211_vif *vif, u16 queue,
 704                                 const struct ieee80211_tx_queue_params *params)
 705 {
 706         struct rsi_hw *adapter = hw->priv;
 707         struct rsi_common *common = adapter->priv;
 708         u8 idx = 0;
 709
 710         if (queue >= IEEE80211_NUM_ACS)
 711                 return 0;
 712
 713         rsi_dbg(INFO_ZONE,
 714                 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
 715                 __func__, queue, params->aifs,
 716                 params->cw_min, params->cw_max, params->txop);
 717
 718         mutex_lock(&common->mutex);
 719         /* Map into the way the f/w expects */
 720         switch (queue) {
 721         case IEEE80211_AC_VO:
 722                 idx = VO_Q;
 723                 break;
 724         case IEEE80211_AC_VI:
 725                 idx = VI_Q;
 726                 break;
 727         case IEEE80211_AC_BE:
 728                 idx = BE_Q;
 729                 break;
 730         case IEEE80211_AC_BK:
 731                 idx = BK_Q;
 732                 break;
 733         default:
 734                 idx = BE_Q;
 735                 break;
 736         }
 737
 738         memcpy(&common->edca_params[idx],
 739                params,
 740                sizeof(struct ieee80211_tx_queue_params));
 741
 742         if (params->uapsd)
 743                 common->uapsd_bitmap |= idx;
 744         else
 745                 common->uapsd_bitmap &= (~idx);
 746
 747         mutex_unlock(&common->mutex);
 748
 749         return 0;
 750 }
 751
 752 /**
 753  * rsi_hal_key_config() - This function loads the keys into the firmware.
 754  * @hw: Pointer to the ieee80211_hw structure.
 755  * @vif: Pointer to the ieee80211_vif structure.
 756  * @key: Pointer to the ieee80211_key_conf structure.
 757  *
 758  * Return: status: 0 on success, negative error codes on failure.
 759  */
 760 static int rsi_hal_key_config(struct ieee80211_hw *hw,
 761                               struct ieee80211_vif *vif,
 762                               struct ieee80211_key_conf *key,
 763                               struct ieee80211_sta *sta)
 764 {
 765         struct rsi_hw *adapter = hw->priv;
 766         struct rsi_sta *rsta = NULL;
 767         int status;
 768         u8 key_type;
 769         s16 sta_id = 0;
 770
 771         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 772                 key_type = RSI_PAIRWISE_KEY;
 773         else
 774                 key_type = RSI_GROUP_KEY;
 775
 776         rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
 777                 __func__, key->cipher, key_type, key->keylen);
 778
 779         if (vif->type == NL80211_IFTYPE_AP) {
 780                 if (sta) {
 781                         rsta = rsi_find_sta(adapter->priv, sta->addr);
 782                         if (rsta)
 783                                 sta_id = rsta->sta_id;
 784                 }
 785                 adapter->priv->key = key;
 786         } else {
 787                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
 788                     (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 789                         status = rsi_hal_load_key(adapter->priv,
 790                                                   key->key,
 791                                                   key->keylen,
 792                                                   RSI_PAIRWISE_KEY,
 793                                                   key->keyidx,
 794                                                   key->cipher,
 795                                                   sta_id);
 796                         if (status)
 797                                 return status;
 798                 }
 799         }
 800
 801         return rsi_hal_load_key(adapter->priv,
 802                                 key->key,
 803                                 key->keylen,
 804                                 key_type,
 805                                 key->keyidx,
 806                                 key->cipher,
 807                                 sta_id);
 808 }
 809
 810 /**
 811  * rsi_mac80211_set_key() - This function sets type of key to be loaded.
 812  * @hw: Pointer to the ieee80211_hw structure.
 813  * @cmd: enum set_key_cmd.
 814  * @vif: Pointer to the ieee80211_vif structure.
 815  * @sta: Pointer to the ieee80211_sta structure.
 816  * @key: Pointer to the ieee80211_key_conf structure.
 817  *
 818  * Return: status: 0 on success, negative error code on failure.
 819  */
 820 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
 821                                 enum set_key_cmd cmd,
 822                                 struct ieee80211_vif *vif,
 823                                 struct ieee80211_sta *sta,
 824                                 struct ieee80211_key_conf *key)
 825 {
 826         struct rsi_hw *adapter = hw->priv;
 827         struct rsi_common *common = adapter->priv;
 828         struct security_info *secinfo = &common->secinfo;
 829         int status;
 830
 831         mutex_lock(&common->mutex);
 832         switch (cmd) {
 833         case SET_KEY:
 834                 secinfo->security_enable = true;
 835                 status = rsi_hal_key_config(hw, vif, key, sta);
 836                 if (status) {
 837                         mutex_unlock(&common->mutex);
 838                         return status;
 839                 }
 840
 841                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 842                         secinfo->ptk_cipher = key->cipher;
 843                 else
 844                         secinfo->gtk_cipher = key->cipher;
 845
 846                 key->hw_key_idx = key->keyidx;
 847                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 848
 849                 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
 850                 break;
 851
 852         case DISABLE_KEY:
 853                 if (vif->type == NL80211_IFTYPE_STATION)
 854                         secinfo->security_enable = false;
 855                 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
 856                 memset(key, 0, sizeof(struct ieee80211_key_conf));
 857                 status = rsi_hal_key_config(hw, vif, key, sta);
 858                 break;
 859
 860         default:
 861                 status = -EOPNOTSUPP;
 862                 break;
 863         }
 864
 865         mutex_unlock(&common->mutex);
 866         return status;
 867 }
 868
 869 /**
 870  * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
 871  *                               the corresponding mlme_action flag and
 872  *                               informs the f/w regarding this.
 873  * @hw: Pointer to the ieee80211_hw structure.
 874  * @vif: Pointer to the ieee80211_vif structure.
 875  * @params: Pointer to A-MPDU action parameters
 876  *
 877  * Return: status: 0 on success, negative error code on failure.
 878  */
 879 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
 880                                      struct ieee80211_vif *vif,
 881                                      struct ieee80211_ampdu_params *params)
 882 {
 883         int status = -EOPNOTSUPP;
 884         struct rsi_hw *adapter = hw->priv;
 885         struct rsi_common *common = adapter->priv;
 886         struct rsi_sta *rsta = NULL;
 887         u16 seq_no = 0, seq_start = 0;
 888         u8 ii = 0;
 889         struct ieee80211_sta *sta = params->sta;
 890         u8 sta_id = 0;
 891         enum ieee80211_ampdu_mlme_action action = params->action;
 892         u16 tid = params->tid;
 893         u16 *ssn = &params->ssn;
 894         u8 buf_size = params->buf_size;
 895
 896         for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
 897                 if (vif == adapter->vifs[ii])
 898                         break;
 899         }
 900
 901         mutex_lock(&common->mutex);
 902
 903         if (ssn != NULL)
 904                 seq_no = *ssn;
 905
 906         if (vif->type == NL80211_IFTYPE_AP) {
 907                 rsta = rsi_find_sta(common, sta->addr);
 908                 if (!rsta) {
 909                         rsi_dbg(ERR_ZONE, "No station mapped\n");
 910                         status = 0;
 911                         goto unlock;
 912                 }
 913                 sta_id = rsta->sta_id;
 914         }
 915
 916         rsi_dbg(INFO_ZONE,
 917                 "%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
 918                 __func__, tid, seq_no, buf_size, sta_id);
 919
 920         switch (action) {
 921         case IEEE80211_AMPDU_RX_START:
 922                 status = rsi_send_aggregation_params_frame(common,
 923                                                            tid,
 924                                                            seq_no,
 925                                                            buf_size,
 926                                                            STA_RX_ADDBA_DONE,
 927                                                            sta_id);
 928                 break;
 929
 930         case IEEE80211_AMPDU_RX_STOP:
 931                 status = rsi_send_aggregation_params_frame(common,
 932                                                            tid,
 933                                                            0,
 934                                                            buf_size,
 935                                                            STA_RX_DELBA,
 936                                                            sta_id);
 937                 break;
 938
 939         case IEEE80211_AMPDU_TX_START:
 940                 if (vif->type == NL80211_IFTYPE_STATION)
 941                         common->vif_info[ii].seq_start = seq_no;
 942                 else if (vif->type == NL80211_IFTYPE_AP)
 943                         rsta->seq_start[tid] = seq_no;
 944                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 945                 status = 0;
 946                 break;
 947
 948         case IEEE80211_AMPDU_TX_STOP_CONT:
 949         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 950         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 951                 status = rsi_send_aggregation_params_frame(common,
 952                                                            tid,
 953                                                            seq_no,
 954                                                            buf_size,
 955                                                            STA_TX_DELBA,
 956                                                            sta_id);
 957                 if (!status)
 958                         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 959                 break;
 960
 961         case IEEE80211_AMPDU_TX_OPERATIONAL:
 962                 if (vif->type == NL80211_IFTYPE_STATION)
 963                         seq_start = common->vif_info[ii].seq_start;
 964                 else if (vif->type == NL80211_IFTYPE_AP)
 965                         seq_start = rsta->seq_start[tid];
 966                 status = rsi_send_aggregation_params_frame(common,
 967                                                            tid,
 968                                                            seq_start,
 969                                                            buf_size,
 970                                                            STA_TX_ADDBA_DONE,
 971                                                            sta_id);
 972                 break;
 973
 974         default:
 975                 rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
 976                 break;
 977         }
 978
 979 unlock:
 980         mutex_unlock(&common->mutex);
 981         return status;
 982 }
 983
 984 /**
 985  * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
 986  * @hw: Pointer to the ieee80211_hw structure.
 987  * @value: Rts threshold value.
 988  *
 989  * Return: 0 on success.
 990  */
 991 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
 992                                           u32 value)
 993 {
 994         struct rsi_hw *adapter = hw->priv;
 995         struct rsi_common *common = adapter->priv;
 996
 997         mutex_lock(&common->mutex);
 998         common->rts_threshold = value;
 999         mutex_unlock(&common->mutex);
1000
1001         return 0;
1002 }
1003
1004 /**
1005  * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1006  * @hw: Pointer to the ieee80211_hw structure
1007  * @vif: Pointer to the ieee80211_vif structure.
1008  * @mask: Pointer to the cfg80211_bitrate_mask structure.
1009  *
1010  * Return: 0 on success.
1011  */
1012 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1013                                       struct ieee80211_vif *vif,
1014                                       const struct cfg80211_bitrate_mask *mask)
1015 {
1016         struct rsi_hw *adapter = hw->priv;
1017         struct rsi_common *common = adapter->priv;
1018         enum nl80211_band band = hw->conf.chandef.chan->band;
1019
1020         mutex_lock(&common->mutex);
1021         common->fixedrate_mask[band] = 0;
1022
1023         if (mask->control[band].legacy == 0xfff) {
1024                 common->fixedrate_mask[band] =
1025                         (mask->control[band].ht_mcs[0] << 12);
1026         } else {
1027                 common->fixedrate_mask[band] =
1028                         mask->control[band].legacy;
1029         }
1030         mutex_unlock(&common->mutex);
1031
1032         return 0;
1033 }
1034
1035 /**
1036  * rsi_perform_cqm() - This function performs cqm.
1037  * @common: Pointer to the driver private structure.
1038  * @bssid: pointer to the bssid.
1039  * @rssi: RSSI value.
1040  */
1041 static void rsi_perform_cqm(struct rsi_common *common,
1042                             u8 *bssid,
1043                             s8 rssi)
1044 {
1045         struct rsi_hw *adapter = common->priv;
1046         s8 last_event = common->cqm_info.last_cqm_event_rssi;
1047         int thold = common->cqm_info.rssi_thold;
1048         u32 hyst = common->cqm_info.rssi_hyst;
1049         enum nl80211_cqm_rssi_threshold_event event;
1050
1051         if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1052                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1053         else if (rssi > thold &&
1054                  (last_event == 0 || rssi > (last_event + hyst)))
1055                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1056         else
1057                 return;
1058
1059         common->cqm_info.last_cqm_event_rssi = rssi;
1060         rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1061         ieee80211_cqm_rssi_notify(adapter->vifs[0], event, rssi, GFP_KERNEL);
1062
1063         return;
1064 }
1065
1066 /**
1067  * rsi_fill_rx_status() - This function fills rx status in
1068  *                        ieee80211_rx_status structure.
1069  * @hw: Pointer to the ieee80211_hw structure.
1070  * @skb: Pointer to the socket buffer structure.
1071  * @common: Pointer to the driver private structure.
1072  * @rxs: Pointer to the ieee80211_rx_status structure.
1073  *
1074  * Return: None.
1075  */
1076 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1077                                struct sk_buff *skb,
1078                                struct rsi_common *common,
1079                                struct ieee80211_rx_status *rxs)
1080 {
1081         struct ieee80211_bss_conf *bss = &common->priv->vifs[0]->bss_conf;
1082         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1083         struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1084         struct ieee80211_hdr *hdr;
1085         char rssi = rx_params->rssi;
1086         u8 hdrlen = 0;
1087         u8 channel = rx_params->channel;
1088         s32 freq;
1089
1090         hdr = ((struct ieee80211_hdr *)(skb->data));
1091         hdrlen = ieee80211_hdrlen(hdr->frame_control);
1092
1093         memset(info, 0, sizeof(struct ieee80211_tx_info));
1094
1095         rxs->signal = -(rssi);
1096
1097         rxs->band = common->band;
1098
1099         freq = ieee80211_channel_to_frequency(channel, rxs->band);
1100
1101         if (freq)
1102                 rxs->freq = freq;
1103
1104         if (ieee80211_has_protected(hdr->frame_control)) {
1105                 if (rsi_is_cipher_wep(common)) {
1106                         memmove(skb->data + 4, skb->data, hdrlen);
1107                         skb_pull(skb, 4);
1108                 } else {
1109                         memmove(skb->data + 8, skb->data, hdrlen);
1110                         skb_pull(skb, 8);
1111                         rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1112                 }
1113                 rxs->flag |= RX_FLAG_DECRYPTED;
1114                 rxs->flag |= RX_FLAG_IV_STRIPPED;
1115         }
1116
1117         /* CQM only for connected AP beacons, the RSSI is a weighted avg */
1118         if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1119                 if (ieee80211_is_beacon(hdr->frame_control))
1120                         rsi_perform_cqm(common, hdr->addr2, rxs->signal);
1121         }
1122
1123         return;
1124 }
1125
1126 /**
1127  * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
1128  * @common: Pointer to the driver private structure.
1129  * @skb: Pointer to the socket buffer structure.
1130  *
1131  * Return: None.
1132  */
1133 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1134                             struct sk_buff *skb)
1135 {
1136         struct rsi_hw *adapter = common->priv;
1137         struct ieee80211_hw *hw = adapter->hw;
1138         struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1139
1140         if ((common->iface_down) || (!adapter->sc_nvifs)) {
1141                 dev_kfree_skb(skb);
1142                 return;
1143         }
1144
1145         /* filling in the ieee80211_rx_status flags */
1146         rsi_fill_rx_status(hw, skb, common, rx_status);
1147
1148         ieee80211_rx_irqsafe(hw, skb);
1149 }
1150
1151 static void rsi_set_min_rate(struct ieee80211_hw *hw,
1152                              struct ieee80211_sta *sta,
1153                              struct rsi_common *common)
1154 {
1155         u8 band = hw->conf.chandef.chan->band;
1156         u8 ii;
1157         u32 rate_bitmap;
1158         bool matched = false;
1159
1160         common->bitrate_mask[band] = sta->supp_rates[band];
1161
1162         rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
1163
1164         if (rate_bitmap & 0xfff) {
1165                 /* Find out the min rate */
1166                 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
1167                         if (rate_bitmap & BIT(ii)) {
1168                                 common->min_rate = rsi_rates[ii].hw_value;
1169                                 matched = true;
1170                                 break;
1171                         }
1172                 }
1173         }
1174
1175         common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
1176
1177         if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
1178                 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
1179                         if ((rate_bitmap >> 12) & BIT(ii)) {
1180                                 common->min_rate = rsi_mcsrates[ii];
1181                                 matched = true;
1182                                 break;
1183                         }
1184                 }
1185         }
1186
1187         if (!matched)
1188                 common->min_rate = 0xffff;
1189 }
1190
1191 /**
1192  * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1193  *                          connected.
1194  * @hw: pointer to the ieee80211_hw structure.
1195  * @vif: Pointer to the ieee80211_vif structure.
1196  * @sta: Pointer to the ieee80211_sta structure.
1197  *
1198  * Return: 0 on success, negative error codes on failure.
1199  */
1200 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1201                                 struct ieee80211_vif *vif,
1202                                 struct ieee80211_sta *sta)
1203 {
1204         struct rsi_hw *adapter = hw->priv;
1205         struct rsi_common *common = adapter->priv;
1206         bool sta_exist = false;
1207         struct rsi_sta *rsta;
1208         int status = 0;
1209
1210         rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1211
1212         mutex_lock(&common->mutex);
1213
1214         if (vif->type == NL80211_IFTYPE_AP) {
1215                 u8 cnt;
1216                 int sta_idx = -1;
1217                 int free_index = -1;
1218
1219                 /* Check if max stations reached */
1220                 if (common->num_stations >= common->max_stations) {
1221                         rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1222                         status = -EOPNOTSUPP;
1223                         goto unlock;
1224                 }
1225                 for (cnt = 0; cnt < common->max_stations; cnt++) {
1226                         rsta = &common->stations[cnt];
1227
1228                         if (!rsta->sta) {
1229                                 if (free_index < 0)
1230                                         free_index = cnt;
1231                                 continue;
1232                         }
1233                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1234                                 rsi_dbg(INFO_ZONE, "Station exists\n");
1235                                 sta_idx = cnt;
1236                                 sta_exist = true;
1237                                 break;
1238                         }
1239                 }
1240                 if (!sta_exist) {
1241                         if (free_index >= 0)
1242                                 sta_idx = free_index;
1243                 }
1244                 if (sta_idx < 0) {
1245                         rsi_dbg(ERR_ZONE,
1246                                 "%s: Some problem reaching here...\n",
1247                                 __func__);
1248                         status = -EINVAL;
1249                         goto unlock;
1250                 }
1251                 rsta = &common->stations[sta_idx];
1252                 rsta->sta = sta;
1253                 rsta->sta_id = sta_idx;
1254                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1255                         rsta->start_tx_aggr[cnt] = false;
1256                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1257                         rsta->seq_start[cnt] = 0;
1258                 if (!sta_exist) {
1259                         rsi_dbg(INFO_ZONE, "New Station\n");
1260
1261                         /* Send peer notify to device */
1262                         rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1263                         rsi_inform_bss_status(common, AP_OPMODE, 1, sta->addr,
1264                                               sta->wme, sta->aid, sta, sta_idx);
1265
1266                         if (common->key) {
1267                                 struct ieee80211_key_conf *key = common->key;
1268
1269                                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1270                                     (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1271                                         rsi_hal_load_key(adapter->priv,
1272                                                          key->key,
1273                                                          key->keylen,
1274                                                          RSI_PAIRWISE_KEY,
1275                                                          key->keyidx,
1276                                                          key->cipher,
1277                                                          sta_idx);
1278                         }
1279
1280                         common->num_stations++;
1281                 }
1282         }
1283
1284         if (vif->type == NL80211_IFTYPE_STATION) {
1285                 rsi_set_min_rate(hw, sta, common);
1286                 if (sta->ht_cap.ht_supported) {
1287                         common->vif_info[0].is_ht = true;
1288                         common->bitrate_mask[NL80211_BAND_2GHZ] =
1289                                         sta->supp_rates[NL80211_BAND_2GHZ];
1290                         if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1291                             (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1292                                 common->vif_info[0].sgi = true;
1293                         ieee80211_start_tx_ba_session(sta, 0, 0);
1294                 }
1295         }
1296
1297 unlock:
1298         mutex_unlock(&common->mutex);
1299
1300         return status;
1301 }
1302
1303 /**
1304  * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1305  *                             getting disconnected.
1306  * @hw: Pointer to the ieee80211_hw structure.
1307  * @vif: Pointer to the ieee80211_vif structure.
1308  * @sta: Pointer to the ieee80211_sta structure.
1309  *
1310  * Return: 0 on success, negative error codes on failure.
1311  */
1312 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1313                                    struct ieee80211_vif *vif,
1314                                    struct ieee80211_sta *sta)
1315 {
1316         struct rsi_hw *adapter = hw->priv;
1317         struct rsi_common *common = adapter->priv;
1318         struct ieee80211_bss_conf *bss = &vif->bss_conf;
1319         struct rsi_sta *rsta;
1320
1321         rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1322
1323         mutex_lock(&common->mutex);
1324
1325         if (vif->type == NL80211_IFTYPE_AP) {
1326                 u8 sta_idx, cnt;
1327
1328                 /* Send peer notify to device */
1329                 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1330                 for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1331                         rsta = &common->stations[sta_idx];
1332
1333                         if (!rsta->sta)
1334                                 continue;
1335                         if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1336                                 rsi_inform_bss_status(common, AP_OPMODE, 0,
1337                                                       sta->addr, sta->wme,
1338                                                       sta->aid, sta, sta_idx);
1339                                 rsta->sta = NULL;
1340                                 rsta->sta_id = -1;
1341                                 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1342                                         rsta->start_tx_aggr[cnt] = false;
1343                                 if (common->num_stations > 0)
1344                                         common->num_stations--;
1345                                 break;
1346                         }
1347                 }
1348                 if (sta_idx >= common->max_stations)
1349                         rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1350         }
1351
1352         if (vif->type == NL80211_IFTYPE_STATION) {
1353                 /* Resetting all the fields to default values */
1354                 memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1355                 bss->qos = sta->wme;
1356                 common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1357                 common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1358                 common->min_rate = 0xffff;
1359                 common->vif_info[0].is_ht = false;
1360                 common->vif_info[0].sgi = false;
1361                 common->vif_info[0].seq_start = 0;
1362                 common->secinfo.ptk_cipher = 0;
1363                 common->secinfo.gtk_cipher = 0;
1364                 if (!common->iface_down)
1365                         rsi_send_rx_filter_frame(common, 0);
1366         }
1367         mutex_unlock(&common->mutex);
1368
1369         return 0;
1370 }
1371
1372 /**
1373  * rsi_mac80211_set_antenna() - This function is used to configure
1374  *                              tx and rx antennas.
1375  * @hw: Pointer to the ieee80211_hw structure.
1376  * @tx_ant: Bitmap for tx antenna
1377  * @rx_ant: Bitmap for rx antenna
1378  *
1379  * Return: 0 on success, Negative error code on failure.
1380  */
1381 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1382                                     u32 tx_ant, u32 rx_ant)
1383 {
1384         struct rsi_hw *adapter = hw->priv;
1385         struct rsi_common *common = adapter->priv;
1386         u8 antenna = 0;
1387
1388         if (tx_ant > 1 || rx_ant > 1) {
1389                 rsi_dbg(ERR_ZONE,
1390                         "Invalid antenna selection (tx: %d, rx:%d)\n",
1391                         tx_ant, rx_ant);
1392                 rsi_dbg(ERR_ZONE,
1393                         "Use 0 for int_ant, 1 for ext_ant\n");
1394                 return -EINVAL;
1395         }
1396
1397         rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1398                         __func__, tx_ant, rx_ant);
1399
1400         mutex_lock(&common->mutex);
1401
1402         antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1403         if (common->ant_in_use != antenna)
1404                 if (rsi_set_antenna(common, antenna))
1405                         goto fail_set_antenna;
1406
1407         rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1408                 tx_ant ? "UFL" : "INT");
1409
1410         common->ant_in_use = antenna;
1411
1412         mutex_unlock(&common->mutex);
1413
1414         return 0;
1415
1416 fail_set_antenna:
1417         rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1418         mutex_unlock(&common->mutex);
1419         return -EINVAL;
1420 }
1421
1422 /**
1423  * rsi_mac80211_get_antenna() - This function is used to configure
1424  *                              tx and rx antennas.
1425  *
1426  * @hw: Pointer to the ieee80211_hw structure.
1427  * @tx_ant: Bitmap for tx antenna
1428  * @rx_ant: Bitmap for rx antenna
1429  *
1430  * Return: 0 on success, negative error codes on failure.
1431  */
1432 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1433                                     u32 *tx_ant, u32 *rx_ant)
1434 {
1435         struct rsi_hw *adapter = hw->priv;
1436         struct rsi_common *common = adapter->priv;
1437
1438         mutex_lock(&common->mutex);
1439
1440         *tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1441         *rx_ant = 0;
1442
1443         mutex_unlock(&common->mutex);
1444
1445         return 0;
1446 }
1447
1448 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1449 {
1450         switch (region_code) {
1451         case NL80211_DFS_FCC:
1452                 return RSI_REGION_FCC;
1453         case NL80211_DFS_ETSI:
1454                 return RSI_REGION_ETSI;
1455         case NL80211_DFS_JP:
1456                 return RSI_REGION_TELEC;
1457         case NL80211_DFS_UNSET:
1458                 return RSI_REGION_WORLD;
1459         }
1460         return RSI_REGION_WORLD;
1461 }
1462
1463 static void rsi_reg_notify(struct wiphy *wiphy,
1464                            struct regulatory_request *request)
1465 {
1466         struct ieee80211_supported_band *sband;
1467         struct ieee80211_channel *ch;
1468         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1469         struct rsi_hw * adapter = hw->priv;
1470         struct rsi_common *common = adapter->priv;
1471         int i;
1472
1473         mutex_lock(&common->mutex);
1474
1475         rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1476                 request->alpha2, request->dfs_region);
1477
1478         if (common->num_supp_bands > 1) {
1479                 sband = wiphy->bands[NL80211_BAND_5GHZ];
1480
1481                 for (i = 0; i < sband->n_channels; i++) {
1482                         ch = &sband->channels[i];
1483                         if (ch->flags & IEEE80211_CHAN_DISABLED)
1484                                 continue;
1485
1486                         if (ch->flags & IEEE80211_CHAN_RADAR)
1487                                 ch->flags |= IEEE80211_CHAN_NO_IR;
1488                 }
1489         }
1490         adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1491         rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1492
1493         adapter->country[0] = request->alpha2[0];
1494         adapter->country[1] = request->alpha2[1];
1495
1496         mutex_unlock(&common->mutex);
1497 }
1498
1499 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1500 {
1501         struct rsi_hw *adapter = hw->priv;
1502         struct rsi_common *common = adapter->priv;
1503
1504         mutex_lock(&common->mutex);
1505         if (common->fsm_state != FSM_MAC_INIT_DONE)
1506                 wiphy_rfkill_set_hw_state(hw->wiphy, true);
1507         else
1508                 wiphy_rfkill_set_hw_state(hw->wiphy, false);
1509         mutex_unlock(&common->mutex);
1510 }
1511
1512 static const struct ieee80211_ops mac80211_ops = {
1513         .tx = rsi_mac80211_tx,
1514         .start = rsi_mac80211_start,
1515         .stop = rsi_mac80211_stop,
1516         .add_interface = rsi_mac80211_add_interface,
1517         .remove_interface = rsi_mac80211_remove_interface,
1518         .config = rsi_mac80211_config,
1519         .bss_info_changed = rsi_mac80211_bss_info_changed,
1520         .conf_tx = rsi_mac80211_conf_tx,
1521         .configure_filter = rsi_mac80211_conf_filter,
1522         .set_key = rsi_mac80211_set_key,
1523         .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1524         .set_bitrate_mask = rsi_mac80211_set_rate_mask,
1525         .ampdu_action = rsi_mac80211_ampdu_action,
1526         .sta_add = rsi_mac80211_sta_add,
1527         .sta_remove = rsi_mac80211_sta_remove,
1528         .set_antenna = rsi_mac80211_set_antenna,
1529         .get_antenna = rsi_mac80211_get_antenna,
1530         .rfkill_poll = rsi_mac80211_rfkill_poll,
1531 };
1532
1533 /**
1534  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1535  * @common: Pointer to the driver private structure.
1536  *
1537  * Return: 0 on success, negative error codes on failure.
1538  */
1539 int rsi_mac80211_attach(struct rsi_common *common)
1540 {
1541         int status = 0;
1542         struct ieee80211_hw *hw = NULL;
1543         struct wiphy *wiphy = NULL;
1544         struct rsi_hw *adapter = common->priv;
1545         u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
1546
1547         rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
1548
1549         hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
1550         if (!hw) {
1551                 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
1552                 return -ENOMEM;
1553         }
1554
1555         wiphy = hw->wiphy;
1556
1557         SET_IEEE80211_DEV(hw, adapter->device);
1558
1559         hw->priv = adapter;
1560         adapter->hw = hw;
1561
1562         ieee80211_hw_set(hw, SIGNAL_DBM);
1563         ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1564         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1565         ieee80211_hw_set(hw, SUPPORTS_PS);
1566         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
1567
1568         hw->queues = MAX_HW_QUEUES;
1569         hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
1570
1571         hw->max_rates = 1;
1572         hw->max_rate_tries = MAX_RETRIES;
1573         hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
1574         hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
1575
1576         hw->max_tx_aggregation_subframes = 6;
1577         rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
1578         rsi_register_rates_channels(adapter, NL80211_BAND_5GHZ);
1579         hw->rate_control_algorithm = "AARF";
1580
1581         SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
1582         ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
1583
1584         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1585                                  BIT(NL80211_IFTYPE_AP);
1586         wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1587         wiphy->retry_short = RETRY_SHORT;
1588         wiphy->retry_long  = RETRY_LONG;
1589         wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1590         wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1591         wiphy->flags = 0;
1592
1593         wiphy->available_antennas_rx = 1;
1594         wiphy->available_antennas_tx = 1;
1595         wiphy->bands[NL80211_BAND_2GHZ] =
1596                 &adapter->sbands[NL80211_BAND_2GHZ];
1597         wiphy->bands[NL80211_BAND_5GHZ] =
1598                 &adapter->sbands[NL80211_BAND_5GHZ];
1599
1600         /* AP Parameters */
1601         wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
1602         common->max_stations = wiphy->max_ap_assoc_sta;
1603         rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
1604         hw->sta_data_size = sizeof(struct rsi_sta);
1605         wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
1606         wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
1607         wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
1608         wiphy->reg_notifier = rsi_reg_notify;
1609
1610         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1611
1612         status = ieee80211_register_hw(hw);
1613         if (status)
1614                 return status;
1615
1616         return rsi_init_dbgfs(adapter);
1617 }