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 = IEEE80211_BAND_2GHZ, .center_freq = 2412,
  24           .hw_value = 1 }, /* Channel 1 */
  25         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2417,
  26           .hw_value = 2 }, /* Channel 2 */
  27         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2422,
  28           .hw_value = 3 }, /* Channel 3 */
  29         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2427,
  30           .hw_value = 4 }, /* Channel 4 */
  31         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2432,
  32           .hw_value = 5 }, /* Channel 5 */
  33         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2437,
  34           .hw_value = 6 }, /* Channel 6 */
  35         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2442,
  36           .hw_value = 7 }, /* Channel 7 */
  37         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2447,
  38           .hw_value = 8 }, /* Channel 8 */
  39         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2452,
  40           .hw_value = 9 }, /* Channel 9 */
  41         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2457,
  42           .hw_value = 10 }, /* Channel 10 */
  43         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2462,
  44           .hw_value = 11 }, /* Channel 11 */
  45         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2467,
  46           .hw_value = 12 }, /* Channel 12 */
  47         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2472,
  48           .hw_value = 13 }, /* Channel 13 */
  49         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2484,
  50           .hw_value = 14 }, /* Channel 14 */
  51 };
  52
  53 static const struct ieee80211_channel rsi_5ghz_channels[] = {
  54         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5180,
  55           .hw_value = 36,  }, /* Channel 36 */
  56         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5200,
  57           .hw_value = 40, }, /* Channel 40 */
  58         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5220,
  59           .hw_value = 44, }, /* Channel 44 */
  60         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5240,
  61           .hw_value = 48, }, /* Channel 48 */
  62         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5260,
  63           .hw_value = 52, }, /* Channel 52 */
  64         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5280,
  65           .hw_value = 56, }, /* Channel 56 */
  66         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5300,
  67           .hw_value = 60, }, /* Channel 60 */
  68         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5320,
  69           .hw_value = 64, }, /* Channel 64 */
  70         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5500,
  71           .hw_value = 100, }, /* Channel 100 */
  72         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5520,
  73           .hw_value = 104, }, /* Channel 104 */
  74         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5540,
  75           .hw_value = 108, }, /* Channel 108 */
  76         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5560,
  77           .hw_value = 112, }, /* Channel 112 */
  78         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5580,
  79           .hw_value = 116, }, /* Channel 116 */
  80         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5600,
  81           .hw_value = 120, }, /* Channel 120 */
  82         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5620,
  83           .hw_value = 124, }, /* Channel 124 */
  84         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5640,
  85           .hw_value = 128, }, /* Channel 128 */
  86         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5660,
  87           .hw_value = 132, }, /* Channel 132 */
  88         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5680,
  89           .hw_value = 136, }, /* Channel 136 */
  90         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5700,
  91           .hw_value = 140, }, /* Channel 140 */
  92         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5745,
  93           .hw_value = 149, }, /* Channel 149 */
  94         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5765,
  95           .hw_value = 153, }, /* Channel 153 */
  96         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5785,
  97           .hw_value = 157, }, /* Channel 157 */
  98         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5805,
  99           .hw_value = 161, }, /* Channel 161 */
 100         { .band = IEEE80211_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 == IEEE80211_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 = IEEE80211_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 = IEEE80211_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_8K;
 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
 198         if (hw) {
 199                 ieee80211_stop_queues(hw);
 200                 ieee80211_unregister_hw(hw);
 201                 ieee80211_free_hw(hw);
 202         }
 203
 204         rsi_remove_dbgfs(adapter);
 205 }
 206 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
 207
 208 /**
 209  * rsi_indicate_tx_status() - This function indicates the transmit status.
 210  * @adapter: Pointer to the adapter structure.
 211  * @skb: Pointer to the socket buffer structure.
 212  * @status: Status
 213  *
 214  * Return: None.
 215  */
 216 void rsi_indicate_tx_status(struct rsi_hw *adapter,
 217                             struct sk_buff *skb,
 218                             int status)
 219 {
 220         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 221
 222         memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
 223
 224         if (!status)
 225                 info->flags |= IEEE80211_TX_STAT_ACK;
 226
 227         ieee80211_tx_status_irqsafe(adapter->hw, skb);
 228 }
 229
 230 /**
 231  * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
 232  *                     transmitted frame.SKB contains the buffer starting
 233  *                     from the IEEE 802.11 header.
 234  * @hw: Pointer to the ieee80211_hw structure.
 235  * @control: Pointer to the ieee80211_tx_control structure
 236  * @skb: Pointer to the socket buffer structure.
 237  *
 238  * Return: None
 239  */
 240 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
 241                             struct ieee80211_tx_control *control,
 242                             struct sk_buff *skb)
 243 {
 244         struct rsi_hw *adapter = hw->priv;
 245         struct rsi_common *common = adapter->priv;
 246
 247         rsi_core_xmit(common, skb);
 248 }
 249
 250 /**
 251  * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
 252  *                        the driver init is complete by then, just
 253  *                        returns success.
 254  * @hw: Pointer to the ieee80211_hw structure.
 255  *
 256  * Return: 0 as success.
 257  */
 258 static int rsi_mac80211_start(struct ieee80211_hw *hw)
 259 {
 260         struct rsi_hw *adapter = hw->priv;
 261         struct rsi_common *common = adapter->priv;
 262
 263         mutex_lock(&common->mutex);
 264         common->iface_down = false;
 265         mutex_unlock(&common->mutex);
 266
 267         return 0;
 268 }
 269
 270 /**
 271  * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
 272  * @hw: Pointer to the ieee80211_hw structure.
 273  *
 274  * Return: None.
 275  */
 276 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
 277 {
 278         struct rsi_hw *adapter = hw->priv;
 279         struct rsi_common *common = adapter->priv;
 280
 281         mutex_lock(&common->mutex);
 282         common->iface_down = true;
 283         mutex_unlock(&common->mutex);
 284 }
 285
 286 /**
 287  * rsi_mac80211_add_interface() - This function is called when a netdevice
 288  *                                attached to the hardware is enabled.
 289  * @hw: Pointer to the ieee80211_hw structure.
 290  * @vif: Pointer to the ieee80211_vif structure.
 291  *
 292  * Return: ret: 0 on success, negative error code on failure.
 293  */
 294 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
 295                                       struct ieee80211_vif *vif)
 296 {
 297         struct rsi_hw *adapter = hw->priv;
 298         struct rsi_common *common = adapter->priv;
 299         int ret = -EOPNOTSUPP;
 300
 301         mutex_lock(&common->mutex);
 302         switch (vif->type) {
 303         case NL80211_IFTYPE_STATION:
 304                 if (!adapter->sc_nvifs) {
 305                         ++adapter->sc_nvifs;
 306                         adapter->vifs[0] = vif;
 307                         ret = rsi_set_vap_capabilities(common, STA_OPMODE);
 308                 }
 309                 break;
 310         default:
 311                 rsi_dbg(ERR_ZONE,
 312                         "%s: Interface type %d not supported\n", __func__,
 313                         vif->type);
 314         }
 315         mutex_unlock(&common->mutex);
 316
 317         return ret;
 318 }
 319
 320 /**
 321  * rsi_mac80211_remove_interface() - This function notifies driver that an
 322  *                                   interface is going down.
 323  * @hw: Pointer to the ieee80211_hw structure.
 324  * @vif: Pointer to the ieee80211_vif structure.
 325  *
 326  * Return: None.
 327  */
 328 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
 329                                           struct ieee80211_vif *vif)
 330 {
 331         struct rsi_hw *adapter = hw->priv;
 332         struct rsi_common *common = adapter->priv;
 333
 334         mutex_lock(&common->mutex);
 335         if (vif->type == NL80211_IFTYPE_STATION)
 336                 adapter->sc_nvifs--;
 337
 338         if (!memcmp(adapter->vifs[0], vif, sizeof(struct ieee80211_vif)))
 339                 adapter->vifs[0] = NULL;
 340         mutex_unlock(&common->mutex);
 341 }
 342
 343 /**
 344  * rsi_mac80211_config() - This function is a handler for configuration
 345  *                         requests. The stack calls this function to
 346  *                         change hardware configuration, e.g., channel.
 347  * @hw: Pointer to the ieee80211_hw structure.
 348  * @changed: Changed flags set.
 349  *
 350  * Return: 0 on success, negative error code on failure.
 351  */
 352 static int rsi_mac80211_config(struct ieee80211_hw *hw,
 353                                u32 changed)
 354 {
 355         struct rsi_hw *adapter = hw->priv;
 356         struct rsi_common *common = adapter->priv;
 357         int status = -EOPNOTSUPP;
 358
 359         mutex_lock(&common->mutex);
 360         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 361                 struct ieee80211_channel *curchan = hw->conf.chandef.chan;
 362                 u16 channel = curchan->hw_value;
 363
 364                 rsi_dbg(INFO_ZONE,
 365                         "%s: Set channel: %d MHz type: %d channel_no %d\n",
 366                         __func__, curchan->center_freq,
 367                         curchan->flags, channel);
 368                 common->band = curchan->band;
 369                 status = rsi_set_channel(adapter->priv, channel);
 370         }
 371         mutex_unlock(&common->mutex);
 372
 373         return status;
 374 }
 375
 376 /**
 377  * rsi_get_connected_channel() - This function is used to get the current
 378  *                               connected channel number.
 379  * @adapter: Pointer to the adapter structure.
 380  *
 381  * Return: Current connected AP's channel number is returned.
 382  */
 383 u16 rsi_get_connected_channel(struct rsi_hw *adapter)
 384 {
 385         struct ieee80211_vif *vif = adapter->vifs[0];
 386         if (vif) {
 387                 struct ieee80211_bss_conf *bss = &vif->bss_conf;
 388                 struct ieee80211_channel *channel = bss->chandef.chan;
 389                 return channel->hw_value;
 390         }
 391
 392         return 0;
 393 }
 394
 395 /**
 396  * rsi_mac80211_bss_info_changed() - This function is a handler for config
 397  *                                   requests related to BSS parameters that
 398  *                                   may vary during BSS's lifespan.
 399  * @hw: Pointer to the ieee80211_hw structure.
 400  * @vif: Pointer to the ieee80211_vif structure.
 401  * @bss_conf: Pointer to the ieee80211_bss_conf structure.
 402  * @changed: Changed flags set.
 403  *
 404  * Return: None.
 405  */
 406 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 407                                           struct ieee80211_vif *vif,
 408                                           struct ieee80211_bss_conf *bss_conf,
 409                                           u32 changed)
 410 {
 411         struct rsi_hw *adapter = hw->priv;
 412         struct rsi_common *common = adapter->priv;
 413
 414         mutex_lock(&common->mutex);
 415         if (changed & BSS_CHANGED_ASSOC) {
 416                 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
 417                         __func__, bss_conf->assoc);
 418                 rsi_inform_bss_status(common,
 419                                       bss_conf->assoc,
 420                                       bss_conf->bssid,
 421                                       bss_conf->qos,
 422                                       bss_conf->aid);
 423         }
 424         mutex_unlock(&common->mutex);
 425 }
 426
 427 /**
 428  * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
 429  * @hw: Pointer to the ieee80211_hw structure.
 430  * @changed: Changed flags set.
 431  * @total_flags: Total initial flags set.
 432  * @multicast: Multicast.
 433  *
 434  * Return: None.
 435  */
 436 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
 437                                      u32 changed_flags,
 438                                      u32 *total_flags,
 439                                      u64 multicast)
 440 {
 441         /* Not doing much here as of now */
 442         *total_flags &= RSI_SUPP_FILTERS;
 443 }
 444
 445 /**
 446  * rsi_mac80211_conf_tx() - This function configures TX queue parameters
 447  *                          (EDCF (aifs, cw_min, cw_max), bursting)
 448  *                          for a hardware TX queue.
 449  * @hw: Pointer to the ieee80211_hw structure
 450  * @vif: Pointer to the ieee80211_vif structure.
 451  * @queue: Queue number.
 452  * @params: Pointer to ieee80211_tx_queue_params structure.
 453  *
 454  * Return: 0 on success, negative error code on failure.
 455  */
 456 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
 457                                 struct ieee80211_vif *vif, u16 queue,
 458                                 const struct ieee80211_tx_queue_params *params)
 459 {
 460         struct rsi_hw *adapter = hw->priv;
 461         struct rsi_common *common = adapter->priv;
 462         u8 idx = 0;
 463
 464         if (queue >= IEEE80211_NUM_ACS)
 465                 return 0;
 466
 467         rsi_dbg(INFO_ZONE,
 468                 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
 469                 __func__, queue, params->aifs,
 470                 params->cw_min, params->cw_max, params->txop);
 471
 472         mutex_lock(&common->mutex);
 473         /* Map into the way the f/w expects */
 474         switch (queue) {
 475         case IEEE80211_AC_VO:
 476                 idx = VO_Q;
 477                 break;
 478         case IEEE80211_AC_VI:
 479                 idx = VI_Q;
 480                 break;
 481         case IEEE80211_AC_BE:
 482                 idx = BE_Q;
 483                 break;
 484         case IEEE80211_AC_BK:
 485                 idx = BK_Q;
 486                 break;
 487         default:
 488                 idx = BE_Q;
 489                 break;
 490         }
 491
 492         memcpy(&common->edca_params[idx],
 493                params,
 494                sizeof(struct ieee80211_tx_queue_params));
 495         mutex_unlock(&common->mutex);
 496
 497         return 0;
 498 }
 499
 500 /**
 501  * rsi_hal_key_config() - This function loads the keys into the firmware.
 502  * @hw: Pointer to the ieee80211_hw structure.
 503  * @vif: Pointer to the ieee80211_vif structure.
 504  * @key: Pointer to the ieee80211_key_conf structure.
 505  *
 506  * Return: status: 0 on success, -1 on failure.
 507  */
 508 static int rsi_hal_key_config(struct ieee80211_hw *hw,
 509                               struct ieee80211_vif *vif,
 510                               struct ieee80211_key_conf *key)
 511 {
 512         struct rsi_hw *adapter = hw->priv;
 513         int status;
 514         u8 key_type;
 515
 516         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 517                 key_type = RSI_PAIRWISE_KEY;
 518         else
 519                 key_type = RSI_GROUP_KEY;
 520
 521         rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
 522                 __func__, key->cipher, key_type, key->keylen);
 523
 524         if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
 525             (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 526                 status = rsi_hal_load_key(adapter->priv,
 527                                           key->key,
 528                                           key->keylen,
 529                                           RSI_PAIRWISE_KEY,
 530                                           key->keyidx,
 531                                           key->cipher);
 532                 if (status)
 533                         return status;
 534         }
 535         return rsi_hal_load_key(adapter->priv,
 536                                 key->key,
 537                                 key->keylen,
 538                                 key_type,
 539                                 key->keyidx,
 540                                 key->cipher);
 541 }
 542
 543 /**
 544  * rsi_mac80211_set_key() - This function sets type of key to be loaded.
 545  * @hw: Pointer to the ieee80211_hw structure.
 546  * @cmd: enum set_key_cmd.
 547  * @vif: Pointer to the ieee80211_vif structure.
 548  * @sta: Pointer to the ieee80211_sta structure.
 549  * @key: Pointer to the ieee80211_key_conf structure.
 550  *
 551  * Return: status: 0 on success, negative error code on failure.
 552  */
 553 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
 554                                 enum set_key_cmd cmd,
 555                                 struct ieee80211_vif *vif,
 556                                 struct ieee80211_sta *sta,
 557                                 struct ieee80211_key_conf *key)
 558 {
 559         struct rsi_hw *adapter = hw->priv;
 560         struct rsi_common *common = adapter->priv;
 561         struct security_info *secinfo = &common->secinfo;
 562         int status;
 563
 564         mutex_lock(&common->mutex);
 565         switch (cmd) {
 566         case SET_KEY:
 567                 secinfo->security_enable = true;
 568                 status = rsi_hal_key_config(hw, vif, key);
 569                 if (status) {
 570                         mutex_unlock(&common->mutex);
 571                         return status;
 572                 }
 573
 574                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 575                         secinfo->ptk_cipher = key->cipher;
 576                 else
 577                         secinfo->gtk_cipher = key->cipher;
 578
 579                 key->hw_key_idx = key->keyidx;
 580                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 581
 582                 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
 583                 break;
 584
 585         case DISABLE_KEY:
 586                 secinfo->security_enable = false;
 587                 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
 588                 memset(key, 0, sizeof(struct ieee80211_key_conf));
 589                 status = rsi_hal_key_config(hw, vif, key);
 590                 break;
 591
 592         default:
 593                 status = -EOPNOTSUPP;
 594                 break;
 595         }
 596
 597         mutex_unlock(&common->mutex);
 598         return status;
 599 }
 600
 601 /**
 602  * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
 603  *                               the corresponding mlme_action flag and
 604  *                               informs the f/w regarding this.
 605  * @hw: Pointer to the ieee80211_hw structure.
 606  * @vif: Pointer to the ieee80211_vif structure.
 607  * @action: ieee80211_ampdu_mlme_action enum.
 608  * @sta: Pointer to the ieee80211_sta structure.
 609  * @tid: Traffic identifier.
 610  * @ssn: Pointer to ssn value.
 611  * @buf_size: Buffer size (for kernel version > 2.6.38).
 612  *
 613  * Return: status: 0 on success, negative error code on failure.
 614  */
 615 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
 616                                      struct ieee80211_vif *vif,
 617                                      enum ieee80211_ampdu_mlme_action action,
 618                                      struct ieee80211_sta *sta,
 619                                      unsigned short tid,
 620                                      unsigned short *ssn,
 621                                      unsigned char buf_size)
 622 {
 623         int status = -EOPNOTSUPP;
 624         struct rsi_hw *adapter = hw->priv;
 625         struct rsi_common *common = adapter->priv;
 626         u16 seq_no = 0;
 627         u8 ii = 0;
 628
 629         for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
 630                 if (vif == adapter->vifs[ii])
 631                         break;
 632         }
 633
 634         mutex_lock(&common->mutex);
 635         rsi_dbg(INFO_ZONE, "%s: AMPDU action %d called\n", __func__, action);
 636         if (ssn != NULL)
 637                 seq_no = *ssn;
 638
 639         switch (action) {
 640         case IEEE80211_AMPDU_RX_START:
 641                 status = rsi_send_aggregation_params_frame(common,
 642                                                            tid,
 643                                                            seq_no,
 644                                                            buf_size,
 645                                                            STA_RX_ADDBA_DONE);
 646                 break;
 647
 648         case IEEE80211_AMPDU_RX_STOP:
 649                 status = rsi_send_aggregation_params_frame(common,
 650                                                            tid,
 651                                                            0,
 652                                                            buf_size,
 653                                                            STA_RX_DELBA);
 654                 break;
 655
 656         case IEEE80211_AMPDU_TX_START:
 657                 common->vif_info[ii].seq_start = seq_no;
 658                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 659                 status = 0;
 660                 break;
 661
 662         case IEEE80211_AMPDU_TX_STOP_CONT:
 663         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 664         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 665                 status = rsi_send_aggregation_params_frame(common,
 666                                                            tid,
 667                                                            seq_no,
 668                                                            buf_size,
 669                                                            STA_TX_DELBA);
 670                 if (!status)
 671                         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 672                 break;
 673
 674         case IEEE80211_AMPDU_TX_OPERATIONAL:
 675                 status = rsi_send_aggregation_params_frame(common,
 676                                                            tid,
 677                                                            common->vif_info[ii]
 678                                                                 .seq_start,
 679                                                            buf_size,
 680                                                            STA_TX_ADDBA_DONE);
 681                 break;
 682
 683         default:
 684                 rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
 685                 break;
 686         }
 687
 688         mutex_unlock(&common->mutex);
 689         return status;
 690 }
 691
 692 /**
 693  * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
 694  * @hw: Pointer to the ieee80211_hw structure.
 695  * @value: Rts threshold value.
 696  *
 697  * Return: 0 on success.
 698  */
 699 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
 700                                           u32 value)
 701 {
 702         struct rsi_hw *adapter = hw->priv;
 703         struct rsi_common *common = adapter->priv;
 704
 705         mutex_lock(&common->mutex);
 706         common->rts_threshold = value;
 707         mutex_unlock(&common->mutex);
 708
 709         return 0;
 710 }
 711
 712 /**
 713  * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
 714  * @hw: Pointer to the ieee80211_hw structure
 715  * @vif: Pointer to the ieee80211_vif structure.
 716  * @mask: Pointer to the cfg80211_bitrate_mask structure.
 717  *
 718  * Return: 0 on success.
 719  */
 720 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
 721                                       struct ieee80211_vif *vif,
 722                                       const struct cfg80211_bitrate_mask *mask)
 723 {
 724         struct rsi_hw *adapter = hw->priv;
 725         struct rsi_common *common = adapter->priv;
 726
 727         mutex_lock(&common->mutex);
 728
 729         common->fixedrate_mask[IEEE80211_BAND_2GHZ] = 0;
 730
 731         if (mask->control[IEEE80211_BAND_2GHZ].legacy == 0xfff) {
 732                 common->fixedrate_mask[IEEE80211_BAND_2GHZ] =
 733                         (mask->control[IEEE80211_BAND_2GHZ].ht_mcs[0] << 12);
 734         } else {
 735                 common->fixedrate_mask[IEEE80211_BAND_2GHZ] =
 736                         mask->control[IEEE80211_BAND_2GHZ].legacy;
 737         }
 738         mutex_unlock(&common->mutex);
 739
 740         return 0;
 741 }
 742
 743 /**
 744  * rsi_fill_rx_status() - This function fills rx status in
 745  *                        ieee80211_rx_status structure.
 746  * @hw: Pointer to the ieee80211_hw structure.
 747  * @skb: Pointer to the socket buffer structure.
 748  * @common: Pointer to the driver private structure.
 749  * @rxs: Pointer to the ieee80211_rx_status structure.
 750  *
 751  * Return: None.
 752  */
 753 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
 754                                struct sk_buff *skb,
 755                                struct rsi_common *common,
 756                                struct ieee80211_rx_status *rxs)
 757 {
 758         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 759         struct skb_info *rx_params = (struct skb_info *)info->driver_data;
 760         struct ieee80211_hdr *hdr;
 761         char rssi = rx_params->rssi;
 762         u8 hdrlen = 0;
 763         u8 channel = rx_params->channel;
 764         s32 freq;
 765
 766         hdr = ((struct ieee80211_hdr *)(skb->data));
 767         hdrlen = ieee80211_hdrlen(hdr->frame_control);
 768
 769         memset(info, 0, sizeof(struct ieee80211_tx_info));
 770
 771         rxs->signal = -(rssi);
 772
 773         if (channel <= 14)
 774                 rxs->band = IEEE80211_BAND_2GHZ;
 775         else
 776                 rxs->band = IEEE80211_BAND_5GHZ;
 777
 778         freq = ieee80211_channel_to_frequency(channel, rxs->band);
 779
 780         if (freq)
 781                 rxs->freq = freq;
 782
 783         if (ieee80211_has_protected(hdr->frame_control)) {
 784                 if (rsi_is_cipher_wep(common)) {
 785                         memmove(skb->data + 4, skb->data, hdrlen);
 786                         skb_pull(skb, 4);
 787                 } else {
 788                         memmove(skb->data + 8, skb->data, hdrlen);
 789                         skb_pull(skb, 8);
 790                         rxs->flag |= RX_FLAG_MMIC_STRIPPED;
 791                 }
 792                 rxs->flag |= RX_FLAG_DECRYPTED;
 793                 rxs->flag |= RX_FLAG_IV_STRIPPED;
 794         }
 795 }
 796
 797 /**
 798  * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
 799  * @common: Pointer to the driver private structure.
 800  * @skb: Pointer to the socket buffer structure.
 801  *
 802  * Return: None.
 803  */
 804 void rsi_indicate_pkt_to_os(struct rsi_common *common,
 805                             struct sk_buff *skb)
 806 {
 807         struct rsi_hw *adapter = common->priv;
 808         struct ieee80211_hw *hw = adapter->hw;
 809         struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
 810
 811         if ((common->iface_down) || (!adapter->sc_nvifs)) {
 812                 dev_kfree_skb(skb);
 813                 return;
 814         }
 815
 816         /* filling in the ieee80211_rx_status flags */
 817         rsi_fill_rx_status(hw, skb, common, rx_status);
 818
 819         ieee80211_rx_irqsafe(hw, skb);
 820 }
 821
 822 static void rsi_set_min_rate(struct ieee80211_hw *hw,
 823                              struct ieee80211_sta *sta,
 824                              struct rsi_common *common)
 825 {
 826         u8 band = hw->conf.chandef.chan->band;
 827         u8 ii;
 828         u32 rate_bitmap;
 829         bool matched = false;
 830
 831         common->bitrate_mask[band] = sta->supp_rates[band];
 832
 833         rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
 834
 835         if (rate_bitmap & 0xfff) {
 836                 /* Find out the min rate */
 837                 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
 838                         if (rate_bitmap & BIT(ii)) {
 839                                 common->min_rate = rsi_rates[ii].hw_value;
 840                                 matched = true;
 841                                 break;
 842                         }
 843                 }
 844         }
 845
 846         common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
 847
 848         if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
 849                 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
 850                         if ((rate_bitmap >> 12) & BIT(ii)) {
 851                                 common->min_rate = rsi_mcsrates[ii];
 852                                 matched = true;
 853                                 break;
 854                         }
 855                 }
 856         }
 857
 858         if (!matched)
 859                 common->min_rate = 0xffff;
 860 }
 861
 862 /**
 863  * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
 864  *                          connected.
 865  * @hw: pointer to the ieee80211_hw structure.
 866  * @vif: Pointer to the ieee80211_vif structure.
 867  * @sta: Pointer to the ieee80211_sta structure.
 868  *
 869  * Return: 0 on success, -1 on failure.
 870  */
 871 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
 872                                 struct ieee80211_vif *vif,
 873                                 struct ieee80211_sta *sta)
 874 {
 875         struct rsi_hw *adapter = hw->priv;
 876         struct rsi_common *common = adapter->priv;
 877
 878         mutex_lock(&common->mutex);
 879
 880         rsi_set_min_rate(hw, sta, common);
 881
 882         if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
 883             (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)) {
 884                 common->vif_info[0].sgi = true;
 885         }
 886
 887         if (sta->ht_cap.ht_supported)
 888                 ieee80211_start_tx_ba_session(sta, 0, 0);
 889
 890         mutex_unlock(&common->mutex);
 891
 892         return 0;
 893 }
 894
 895 /**
 896  * rsi_mac80211_sta_remove() - This function notifies driver about a peer
 897  *                             getting disconnected.
 898  * @hw: Pointer to the ieee80211_hw structure.
 899  * @vif: Pointer to the ieee80211_vif structure.
 900  * @sta: Pointer to the ieee80211_sta structure.
 901  *
 902  * Return: 0 on success, -1 on failure.
 903  */
 904 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
 905                                    struct ieee80211_vif *vif,
 906                                    struct ieee80211_sta *sta)
 907 {
 908         struct rsi_hw *adapter = hw->priv;
 909         struct rsi_common *common = adapter->priv;
 910
 911         mutex_lock(&common->mutex);
 912         /* Resetting all the fields to default values */
 913         common->bitrate_mask[IEEE80211_BAND_2GHZ] = 0;
 914         common->bitrate_mask[IEEE80211_BAND_5GHZ] = 0;
 915         common->min_rate = 0xffff;
 916         common->vif_info[0].is_ht = false;
 917         common->vif_info[0].sgi = false;
 918         common->vif_info[0].seq_start = 0;
 919         common->secinfo.ptk_cipher = 0;
 920         common->secinfo.gtk_cipher = 0;
 921         mutex_unlock(&common->mutex);
 922
 923         return 0;
 924 }
 925
 926 static struct ieee80211_ops mac80211_ops = {
 927         .tx = rsi_mac80211_tx,
 928         .start = rsi_mac80211_start,
 929         .stop = rsi_mac80211_stop,
 930         .add_interface = rsi_mac80211_add_interface,
 931         .remove_interface = rsi_mac80211_remove_interface,
 932         .config = rsi_mac80211_config,
 933         .bss_info_changed = rsi_mac80211_bss_info_changed,
 934         .conf_tx = rsi_mac80211_conf_tx,
 935         .configure_filter = rsi_mac80211_conf_filter,
 936         .set_key = rsi_mac80211_set_key,
 937         .set_rts_threshold = rsi_mac80211_set_rts_threshold,
 938         .set_bitrate_mask = rsi_mac80211_set_rate_mask,
 939         .ampdu_action = rsi_mac80211_ampdu_action,
 940         .sta_add = rsi_mac80211_sta_add,
 941         .sta_remove = rsi_mac80211_sta_remove,
 942 };
 943
 944 /**
 945  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
 946  * @common: Pointer to the driver private structure.
 947  *
 948  * Return: 0 on success, -1 on failure.
 949  */
 950 int rsi_mac80211_attach(struct rsi_common *common)
 951 {
 952         int status = 0;
 953         struct ieee80211_hw *hw = NULL;
 954         struct wiphy *wiphy = NULL;
 955         struct rsi_hw *adapter = common->priv;
 956         u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
 957
 958         rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
 959
 960         hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
 961         if (!hw) {
 962                 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
 963                 return -ENOMEM;
 964         }
 965
 966         wiphy = hw->wiphy;
 967
 968         SET_IEEE80211_DEV(hw, adapter->device);
 969
 970         hw->priv = adapter;
 971         adapter->hw = hw;
 972
 973         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 974                     IEEE80211_HW_HAS_RATE_CONTROL |
 975                     IEEE80211_HW_AMPDU_AGGREGATION |
 976                     0;
 977
 978         hw->queues = MAX_HW_QUEUES;
 979         hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
 980
 981         hw->max_rates = 1;
 982         hw->max_rate_tries = MAX_RETRIES;
 983
 984         hw->max_tx_aggregation_subframes = 6;
 985         rsi_register_rates_channels(adapter, IEEE80211_BAND_2GHZ);
 986         hw->rate_control_algorithm = "AARF";
 987
 988         SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
 989         ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
 990
 991         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
 992         wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 993         wiphy->retry_short = RETRY_SHORT;
 994         wiphy->retry_long  = RETRY_LONG;
 995         wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
 996         wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 997         wiphy->flags = 0;
 998
 999         wiphy->available_antennas_rx = 1;
1000         wiphy->available_antennas_tx = 1;
1001         wiphy->bands[IEEE80211_BAND_2GHZ] =
1002                 &adapter->sbands[IEEE80211_BAND_2GHZ];
1003
1004         status = ieee80211_register_hw(hw);
1005         if (status)
1006                 return status;
1007
1008         return rsi_init_dbgfs(adapter);
1009 }