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