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_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
 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_channel_change() - This function is a performs the checks
 345  *                        required for changing a channel and sets
 346  *                        the channel accordingly.
 347  * @hw: Pointer to the ieee80211_hw structure.
 348  *
 349  * Return: 0 on success, negative error code on failure.
 350  */
 351 static int rsi_channel_change(struct ieee80211_hw *hw)
 352 {
 353         struct rsi_hw *adapter = hw->priv;
 354         struct rsi_common *common = adapter->priv;
 355         int status = -EOPNOTSUPP;
 356         struct ieee80211_channel *curchan = hw->conf.chandef.chan;
 357         u16 channel = curchan->hw_value;
 358         struct ieee80211_bss_conf *bss = &adapter->vifs[0]->bss_conf;
 359
 360         rsi_dbg(INFO_ZONE,
 361                 "%s: Set channel: %d MHz type: %d channel_no %d\n",
 362                 __func__, curchan->center_freq,
 363                 curchan->flags, channel);
 364
 365         if (bss->assoc) {
 366                 if (!common->hw_data_qs_blocked &&
 367                     (rsi_get_connected_channel(adapter) != channel)) {
 368                         rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
 369                         if (!rsi_send_block_unblock_frame(common, true))
 370                                 common->hw_data_qs_blocked = true;
 371                 }
 372         }
 373
 374         status = rsi_band_check(common);
 375         if (!status)
 376                 status = rsi_set_channel(adapter->priv, channel);
 377
 378         if (bss->assoc) {
 379                 if (common->hw_data_qs_blocked &&
 380                     (rsi_get_connected_channel(adapter) == channel)) {
 381                         rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 382                         if (!rsi_send_block_unblock_frame(common, false))
 383                                 common->hw_data_qs_blocked = false;
 384                 }
 385         } else {
 386                 if (common->hw_data_qs_blocked) {
 387                         rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 388                         if (!rsi_send_block_unblock_frame(common, false))
 389                                 common->hw_data_qs_blocked = false;
 390                 }
 391         }
 392
 393         return status;
 394 }
 395
 396 /**
 397  * rsi_mac80211_config() - This function is a handler for configuration
 398  *                         requests. The stack calls this function to
 399  *                         change hardware configuration, e.g., channel.
 400  * @hw: Pointer to the ieee80211_hw structure.
 401  * @changed: Changed flags set.
 402  *
 403  * Return: 0 on success, negative error code on failure.
 404  */
 405 static int rsi_mac80211_config(struct ieee80211_hw *hw,
 406                                u32 changed)
 407 {
 408         struct rsi_hw *adapter = hw->priv;
 409         struct rsi_common *common = adapter->priv;
 410         int status = -EOPNOTSUPP;
 411
 412         mutex_lock(&common->mutex);
 413
 414         if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
 415                 status = rsi_channel_change(hw);
 416
 417         mutex_unlock(&common->mutex);
 418
 419         return status;
 420 }
 421
 422 /**
 423  * rsi_get_connected_channel() - This function is used to get the current
 424  *                               connected channel number.
 425  * @adapter: Pointer to the adapter structure.
 426  *
 427  * Return: Current connected AP's channel number is returned.
 428  */
 429 u16 rsi_get_connected_channel(struct rsi_hw *adapter)
 430 {
 431         struct ieee80211_vif *vif = adapter->vifs[0];
 432         if (vif) {
 433                 struct ieee80211_bss_conf *bss = &vif->bss_conf;
 434                 struct ieee80211_channel *channel = bss->chandef.chan;
 435                 return channel->hw_value;
 436         }
 437
 438         return 0;
 439 }
 440
 441 /**
 442  * rsi_mac80211_bss_info_changed() - This function is a handler for config
 443  *                                   requests related to BSS parameters that
 444  *                                   may vary during BSS's lifespan.
 445  * @hw: Pointer to the ieee80211_hw structure.
 446  * @vif: Pointer to the ieee80211_vif structure.
 447  * @bss_conf: Pointer to the ieee80211_bss_conf structure.
 448  * @changed: Changed flags set.
 449  *
 450  * Return: None.
 451  */
 452 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 453                                           struct ieee80211_vif *vif,
 454                                           struct ieee80211_bss_conf *bss_conf,
 455                                           u32 changed)
 456 {
 457         struct rsi_hw *adapter = hw->priv;
 458         struct rsi_common *common = adapter->priv;
 459
 460         mutex_lock(&common->mutex);
 461         if (changed & BSS_CHANGED_ASSOC) {
 462                 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
 463                         __func__, bss_conf->assoc);
 464                 rsi_inform_bss_status(common,
 465                                       bss_conf->assoc,
 466                                       bss_conf->bssid,
 467                                       bss_conf->qos,
 468                                       bss_conf->aid);
 469         }
 470
 471         if (changed & BSS_CHANGED_CQM) {
 472                 common->cqm_info.last_cqm_event_rssi = 0;
 473                 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
 474                 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
 475                 rsi_dbg(INFO_ZONE, "RSSI throld & hysteresis are: %d %d\n",
 476                         common->cqm_info.rssi_thold,
 477                         common->cqm_info.rssi_hyst);
 478         }
 479         mutex_unlock(&common->mutex);
 480 }
 481
 482 /**
 483  * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
 484  * @hw: Pointer to the ieee80211_hw structure.
 485  * @changed: Changed flags set.
 486  * @total_flags: Total initial flags set.
 487  * @multicast: Multicast.
 488  *
 489  * Return: None.
 490  */
 491 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
 492                                      u32 changed_flags,
 493                                      u32 *total_flags,
 494                                      u64 multicast)
 495 {
 496         /* Not doing much here as of now */
 497         *total_flags &= RSI_SUPP_FILTERS;
 498 }
 499
 500 /**
 501  * rsi_mac80211_conf_tx() - This function configures TX queue parameters
 502  *                          (EDCF (aifs, cw_min, cw_max), bursting)
 503  *                          for a hardware TX queue.
 504  * @hw: Pointer to the ieee80211_hw structure
 505  * @vif: Pointer to the ieee80211_vif structure.
 506  * @queue: Queue number.
 507  * @params: Pointer to ieee80211_tx_queue_params structure.
 508  *
 509  * Return: 0 on success, negative error code on failure.
 510  */
 511 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
 512                                 struct ieee80211_vif *vif, u16 queue,
 513                                 const struct ieee80211_tx_queue_params *params)
 514 {
 515         struct rsi_hw *adapter = hw->priv;
 516         struct rsi_common *common = adapter->priv;
 517         u8 idx = 0;
 518
 519         if (queue >= IEEE80211_NUM_ACS)
 520                 return 0;
 521
 522         rsi_dbg(INFO_ZONE,
 523                 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
 524                 __func__, queue, params->aifs,
 525                 params->cw_min, params->cw_max, params->txop);
 526
 527         mutex_lock(&common->mutex);
 528         /* Map into the way the f/w expects */
 529         switch (queue) {
 530         case IEEE80211_AC_VO:
 531                 idx = VO_Q;
 532                 break;
 533         case IEEE80211_AC_VI:
 534                 idx = VI_Q;
 535                 break;
 536         case IEEE80211_AC_BE:
 537                 idx = BE_Q;
 538                 break;
 539         case IEEE80211_AC_BK:
 540                 idx = BK_Q;
 541                 break;
 542         default:
 543                 idx = BE_Q;
 544                 break;
 545         }
 546
 547         memcpy(&common->edca_params[idx],
 548                params,
 549                sizeof(struct ieee80211_tx_queue_params));
 550         mutex_unlock(&common->mutex);
 551
 552         return 0;
 553 }
 554
 555 /**
 556  * rsi_hal_key_config() - This function loads the keys into the firmware.
 557  * @hw: Pointer to the ieee80211_hw structure.
 558  * @vif: Pointer to the ieee80211_vif structure.
 559  * @key: Pointer to the ieee80211_key_conf structure.
 560  *
 561  * Return: status: 0 on success, -1 on failure.
 562  */
 563 static int rsi_hal_key_config(struct ieee80211_hw *hw,
 564                               struct ieee80211_vif *vif,
 565                               struct ieee80211_key_conf *key)
 566 {
 567         struct rsi_hw *adapter = hw->priv;
 568         int status;
 569         u8 key_type;
 570
 571         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 572                 key_type = RSI_PAIRWISE_KEY;
 573         else
 574                 key_type = RSI_GROUP_KEY;
 575
 576         rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
 577                 __func__, key->cipher, key_type, key->keylen);
 578
 579         if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
 580             (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 581                 status = rsi_hal_load_key(adapter->priv,
 582                                           key->key,
 583                                           key->keylen,
 584                                           RSI_PAIRWISE_KEY,
 585                                           key->keyidx,
 586                                           key->cipher);
 587                 if (status)
 588                         return status;
 589         }
 590         return rsi_hal_load_key(adapter->priv,
 591                                 key->key,
 592                                 key->keylen,
 593                                 key_type,
 594                                 key->keyidx,
 595                                 key->cipher);
 596 }
 597
 598 /**
 599  * rsi_mac80211_set_key() - This function sets type of key to be loaded.
 600  * @hw: Pointer to the ieee80211_hw structure.
 601  * @cmd: enum set_key_cmd.
 602  * @vif: Pointer to the ieee80211_vif structure.
 603  * @sta: Pointer to the ieee80211_sta structure.
 604  * @key: Pointer to the ieee80211_key_conf structure.
 605  *
 606  * Return: status: 0 on success, negative error code on failure.
 607  */
 608 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
 609                                 enum set_key_cmd cmd,
 610                                 struct ieee80211_vif *vif,
 611                                 struct ieee80211_sta *sta,
 612                                 struct ieee80211_key_conf *key)
 613 {
 614         struct rsi_hw *adapter = hw->priv;
 615         struct rsi_common *common = adapter->priv;
 616         struct security_info *secinfo = &common->secinfo;
 617         int status;
 618
 619         mutex_lock(&common->mutex);
 620         switch (cmd) {
 621         case SET_KEY:
 622                 secinfo->security_enable = true;
 623                 status = rsi_hal_key_config(hw, vif, key);
 624                 if (status) {
 625                         mutex_unlock(&common->mutex);
 626                         return status;
 627                 }
 628
 629                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 630                         secinfo->ptk_cipher = key->cipher;
 631                 else
 632                         secinfo->gtk_cipher = key->cipher;
 633
 634                 key->hw_key_idx = key->keyidx;
 635                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 636
 637                 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
 638                 break;
 639
 640         case DISABLE_KEY:
 641                 secinfo->security_enable = false;
 642                 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
 643                 memset(key, 0, sizeof(struct ieee80211_key_conf));
 644                 status = rsi_hal_key_config(hw, vif, key);
 645                 break;
 646
 647         default:
 648                 status = -EOPNOTSUPP;
 649                 break;
 650         }
 651
 652         mutex_unlock(&common->mutex);
 653         return status;
 654 }
 655
 656 /**
 657  * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
 658  *                               the corresponding mlme_action flag and
 659  *                               informs the f/w regarding this.
 660  * @hw: Pointer to the ieee80211_hw structure.
 661  * @vif: Pointer to the ieee80211_vif structure.
 662  * @action: ieee80211_ampdu_mlme_action enum.
 663  * @sta: Pointer to the ieee80211_sta structure.
 664  * @tid: Traffic identifier.
 665  * @ssn: Pointer to ssn value.
 666  * @buf_size: Buffer size (for kernel version > 2.6.38).
 667  * @amsdu: is AMSDU in AMPDU allowed
 668  *
 669  * Return: status: 0 on success, negative error code on failure.
 670  */
 671 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
 672                                      struct ieee80211_vif *vif,
 673                                      enum ieee80211_ampdu_mlme_action action,
 674                                      struct ieee80211_sta *sta,
 675                                      unsigned short tid,
 676                                      unsigned short *ssn,
 677                                      unsigned char buf_size,
 678                                      bool amsdu)
 679 {
 680         int status = -EOPNOTSUPP;
 681         struct rsi_hw *adapter = hw->priv;
 682         struct rsi_common *common = adapter->priv;
 683         u16 seq_no = 0;
 684         u8 ii = 0;
 685
 686         for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
 687                 if (vif == adapter->vifs[ii])
 688                         break;
 689         }
 690
 691         mutex_lock(&common->mutex);
 692         rsi_dbg(INFO_ZONE, "%s: AMPDU action %d called\n", __func__, action);
 693         if (ssn != NULL)
 694                 seq_no = *ssn;
 695
 696         switch (action) {
 697         case IEEE80211_AMPDU_RX_START:
 698                 status = rsi_send_aggregation_params_frame(common,
 699                                                            tid,
 700                                                            seq_no,
 701                                                            buf_size,
 702                                                            STA_RX_ADDBA_DONE);
 703                 break;
 704
 705         case IEEE80211_AMPDU_RX_STOP:
 706                 status = rsi_send_aggregation_params_frame(common,
 707                                                            tid,
 708                                                            0,
 709                                                            buf_size,
 710                                                            STA_RX_DELBA);
 711                 break;
 712
 713         case IEEE80211_AMPDU_TX_START:
 714                 common->vif_info[ii].seq_start = seq_no;
 715                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 716                 status = 0;
 717                 break;
 718
 719         case IEEE80211_AMPDU_TX_STOP_CONT:
 720         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 721         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 722                 status = rsi_send_aggregation_params_frame(common,
 723                                                            tid,
 724                                                            seq_no,
 725                                                            buf_size,
 726                                                            STA_TX_DELBA);
 727                 if (!status)
 728                         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 729                 break;
 730
 731         case IEEE80211_AMPDU_TX_OPERATIONAL:
 732                 status = rsi_send_aggregation_params_frame(common,
 733                                                            tid,
 734                                                            common->vif_info[ii]
 735                                                                 .seq_start,
 736                                                            buf_size,
 737                                                            STA_TX_ADDBA_DONE);
 738                 break;
 739
 740         default:
 741                 rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
 742                 break;
 743         }
 744
 745         mutex_unlock(&common->mutex);
 746         return status;
 747 }
 748
 749 /**
 750  * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
 751  * @hw: Pointer to the ieee80211_hw structure.
 752  * @value: Rts threshold value.
 753  *
 754  * Return: 0 on success.
 755  */
 756 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
 757                                           u32 value)
 758 {
 759         struct rsi_hw *adapter = hw->priv;
 760         struct rsi_common *common = adapter->priv;
 761
 762         mutex_lock(&common->mutex);
 763         common->rts_threshold = value;
 764         mutex_unlock(&common->mutex);
 765
 766         return 0;
 767 }
 768
 769 /**
 770  * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
 771  * @hw: Pointer to the ieee80211_hw structure
 772  * @vif: Pointer to the ieee80211_vif structure.
 773  * @mask: Pointer to the cfg80211_bitrate_mask structure.
 774  *
 775  * Return: 0 on success.
 776  */
 777 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
 778                                       struct ieee80211_vif *vif,
 779                                       const struct cfg80211_bitrate_mask *mask)
 780 {
 781         struct rsi_hw *adapter = hw->priv;
 782         struct rsi_common *common = adapter->priv;
 783         enum ieee80211_band band = hw->conf.chandef.chan->band;
 784
 785         mutex_lock(&common->mutex);
 786         common->fixedrate_mask[band] = 0;
 787
 788         if (mask->control[band].legacy == 0xfff) {
 789                 common->fixedrate_mask[band] =
 790                         (mask->control[band].ht_mcs[0] << 12);
 791         } else {
 792                 common->fixedrate_mask[band] =
 793                         mask->control[band].legacy;
 794         }
 795         mutex_unlock(&common->mutex);
 796
 797         return 0;
 798 }
 799
 800 /**
 801  * rsi_perform_cqm() - This function performs cqm.
 802  * @common: Pointer to the driver private structure.
 803  * @bssid: pointer to the bssid.
 804  * @rssi: RSSI value.
 805  */
 806 static void rsi_perform_cqm(struct rsi_common *common,
 807                             u8 *bssid,
 808                             s8 rssi)
 809 {
 810         struct rsi_hw *adapter = common->priv;
 811         s8 last_event = common->cqm_info.last_cqm_event_rssi;
 812         int thold = common->cqm_info.rssi_thold;
 813         u32 hyst = common->cqm_info.rssi_hyst;
 814         enum nl80211_cqm_rssi_threshold_event event;
 815
 816         if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
 817                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
 818         else if (rssi > thold &&
 819                  (last_event == 0 || rssi > (last_event + hyst)))
 820                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
 821         else
 822                 return;
 823
 824         common->cqm_info.last_cqm_event_rssi = rssi;
 825         rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
 826         ieee80211_cqm_rssi_notify(adapter->vifs[0], event, GFP_KERNEL);
 827
 828         return;
 829 }
 830
 831 /**
 832  * rsi_fill_rx_status() - This function fills rx status in
 833  *                        ieee80211_rx_status structure.
 834  * @hw: Pointer to the ieee80211_hw structure.
 835  * @skb: Pointer to the socket buffer structure.
 836  * @common: Pointer to the driver private structure.
 837  * @rxs: Pointer to the ieee80211_rx_status structure.
 838  *
 839  * Return: None.
 840  */
 841 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
 842                                struct sk_buff *skb,
 843                                struct rsi_common *common,
 844                                struct ieee80211_rx_status *rxs)
 845 {
 846         struct ieee80211_bss_conf *bss = &common->priv->vifs[0]->bss_conf;
 847         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 848         struct skb_info *rx_params = (struct skb_info *)info->driver_data;
 849         struct ieee80211_hdr *hdr;
 850         char rssi = rx_params->rssi;
 851         u8 hdrlen = 0;
 852         u8 channel = rx_params->channel;
 853         s32 freq;
 854
 855         hdr = ((struct ieee80211_hdr *)(skb->data));
 856         hdrlen = ieee80211_hdrlen(hdr->frame_control);
 857
 858         memset(info, 0, sizeof(struct ieee80211_tx_info));
 859
 860         rxs->signal = -(rssi);
 861
 862         rxs->band = common->band;
 863
 864         freq = ieee80211_channel_to_frequency(channel, rxs->band);
 865
 866         if (freq)
 867                 rxs->freq = freq;
 868
 869         if (ieee80211_has_protected(hdr->frame_control)) {
 870                 if (rsi_is_cipher_wep(common)) {
 871                         memmove(skb->data + 4, skb->data, hdrlen);
 872                         skb_pull(skb, 4);
 873                 } else {
 874                         memmove(skb->data + 8, skb->data, hdrlen);
 875                         skb_pull(skb, 8);
 876                         rxs->flag |= RX_FLAG_MMIC_STRIPPED;
 877                 }
 878                 rxs->flag |= RX_FLAG_DECRYPTED;
 879                 rxs->flag |= RX_FLAG_IV_STRIPPED;
 880         }
 881
 882         /* CQM only for connected AP beacons, the RSSI is a weighted avg */
 883         if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
 884                 if (ieee80211_is_beacon(hdr->frame_control))
 885                         rsi_perform_cqm(common, hdr->addr2, rxs->signal);
 886         }
 887
 888         return;
 889 }
 890
 891 /**
 892  * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
 893  * @common: Pointer to the driver private structure.
 894  * @skb: Pointer to the socket buffer structure.
 895  *
 896  * Return: None.
 897  */
 898 void rsi_indicate_pkt_to_os(struct rsi_common *common,
 899                             struct sk_buff *skb)
 900 {
 901         struct rsi_hw *adapter = common->priv;
 902         struct ieee80211_hw *hw = adapter->hw;
 903         struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
 904
 905         if ((common->iface_down) || (!adapter->sc_nvifs)) {
 906                 dev_kfree_skb(skb);
 907                 return;
 908         }
 909
 910         /* filling in the ieee80211_rx_status flags */
 911         rsi_fill_rx_status(hw, skb, common, rx_status);
 912
 913         ieee80211_rx_irqsafe(hw, skb);
 914 }
 915
 916 static void rsi_set_min_rate(struct ieee80211_hw *hw,
 917                              struct ieee80211_sta *sta,
 918                              struct rsi_common *common)
 919 {
 920         u8 band = hw->conf.chandef.chan->band;
 921         u8 ii;
 922         u32 rate_bitmap;
 923         bool matched = false;
 924
 925         common->bitrate_mask[band] = sta->supp_rates[band];
 926
 927         rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
 928
 929         if (rate_bitmap & 0xfff) {
 930                 /* Find out the min rate */
 931                 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
 932                         if (rate_bitmap & BIT(ii)) {
 933                                 common->min_rate = rsi_rates[ii].hw_value;
 934                                 matched = true;
 935                                 break;
 936                         }
 937                 }
 938         }
 939
 940         common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
 941
 942         if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
 943                 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
 944                         if ((rate_bitmap >> 12) & BIT(ii)) {
 945                                 common->min_rate = rsi_mcsrates[ii];
 946                                 matched = true;
 947                                 break;
 948                         }
 949                 }
 950         }
 951
 952         if (!matched)
 953                 common->min_rate = 0xffff;
 954 }
 955
 956 /**
 957  * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
 958  *                          connected.
 959  * @hw: pointer to the ieee80211_hw structure.
 960  * @vif: Pointer to the ieee80211_vif structure.
 961  * @sta: Pointer to the ieee80211_sta structure.
 962  *
 963  * Return: 0 on success, -1 on failure.
 964  */
 965 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
 966                                 struct ieee80211_vif *vif,
 967                                 struct ieee80211_sta *sta)
 968 {
 969         struct rsi_hw *adapter = hw->priv;
 970         struct rsi_common *common = adapter->priv;
 971
 972         mutex_lock(&common->mutex);
 973
 974         rsi_set_min_rate(hw, sta, common);
 975
 976         if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
 977             (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)) {
 978                 common->vif_info[0].sgi = true;
 979         }
 980
 981         if (sta->ht_cap.ht_supported)
 982                 ieee80211_start_tx_ba_session(sta, 0, 0);
 983
 984         mutex_unlock(&common->mutex);
 985
 986         return 0;
 987 }
 988
 989 /**
 990  * rsi_mac80211_sta_remove() - This function notifies driver about a peer
 991  *                             getting disconnected.
 992  * @hw: Pointer to the ieee80211_hw structure.
 993  * @vif: Pointer to the ieee80211_vif structure.
 994  * @sta: Pointer to the ieee80211_sta structure.
 995  *
 996  * Return: 0 on success, -1 on failure.
 997  */
 998 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
 999                                    struct ieee80211_vif *vif,
1000                                    struct ieee80211_sta *sta)
1001 {
1002         struct rsi_hw *adapter = hw->priv;
1003         struct rsi_common *common = adapter->priv;
1004
1005         mutex_lock(&common->mutex);
1006         /* Resetting all the fields to default values */
1007         common->bitrate_mask[IEEE80211_BAND_2GHZ] = 0;
1008         common->bitrate_mask[IEEE80211_BAND_5GHZ] = 0;
1009         common->min_rate = 0xffff;
1010         common->vif_info[0].is_ht = false;
1011         common->vif_info[0].sgi = false;
1012         common->vif_info[0].seq_start = 0;
1013         common->secinfo.ptk_cipher = 0;
1014         common->secinfo.gtk_cipher = 0;
1015         mutex_unlock(&common->mutex);
1016
1017         return 0;
1018 }
1019
1020 static struct ieee80211_ops mac80211_ops = {
1021         .tx = rsi_mac80211_tx,
1022         .start = rsi_mac80211_start,
1023         .stop = rsi_mac80211_stop,
1024         .add_interface = rsi_mac80211_add_interface,
1025         .remove_interface = rsi_mac80211_remove_interface,
1026         .config = rsi_mac80211_config,
1027         .bss_info_changed = rsi_mac80211_bss_info_changed,
1028         .conf_tx = rsi_mac80211_conf_tx,
1029         .configure_filter = rsi_mac80211_conf_filter,
1030         .set_key = rsi_mac80211_set_key,
1031         .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1032         .set_bitrate_mask = rsi_mac80211_set_rate_mask,
1033         .ampdu_action = rsi_mac80211_ampdu_action,
1034         .sta_add = rsi_mac80211_sta_add,
1035         .sta_remove = rsi_mac80211_sta_remove,
1036 };
1037
1038 /**
1039  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1040  * @common: Pointer to the driver private structure.
1041  *
1042  * Return: 0 on success, -1 on failure.
1043  */
1044 int rsi_mac80211_attach(struct rsi_common *common)
1045 {
1046         int status = 0;
1047         struct ieee80211_hw *hw = NULL;
1048         struct wiphy *wiphy = NULL;
1049         struct rsi_hw *adapter = common->priv;
1050         u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
1051
1052         rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
1053
1054         hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
1055         if (!hw) {
1056                 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
1057                 return -ENOMEM;
1058         }
1059
1060         wiphy = hw->wiphy;
1061
1062         SET_IEEE80211_DEV(hw, adapter->device);
1063
1064         hw->priv = adapter;
1065         adapter->hw = hw;
1066
1067         ieee80211_hw_set(hw, SIGNAL_DBM);
1068         ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1069         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1070
1071         hw->queues = MAX_HW_QUEUES;
1072         hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
1073
1074         hw->max_rates = 1;
1075         hw->max_rate_tries = MAX_RETRIES;
1076
1077         hw->max_tx_aggregation_subframes = 6;
1078         rsi_register_rates_channels(adapter, IEEE80211_BAND_2GHZ);
1079         rsi_register_rates_channels(adapter, IEEE80211_BAND_5GHZ);
1080         hw->rate_control_algorithm = "AARF";
1081
1082         SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
1083         ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
1084
1085         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1086         wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1087         wiphy->retry_short = RETRY_SHORT;
1088         wiphy->retry_long  = RETRY_LONG;
1089         wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1090         wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1091         wiphy->flags = 0;
1092
1093         wiphy->available_antennas_rx = 1;
1094         wiphy->available_antennas_tx = 1;
1095         wiphy->bands[IEEE80211_BAND_2GHZ] =
1096                 &adapter->sbands[IEEE80211_BAND_2GHZ];
1097         wiphy->bands[IEEE80211_BAND_5GHZ] =
1098                 &adapter->sbands[IEEE80211_BAND_5GHZ];
1099
1100         status = ieee80211_register_hw(hw);
1101         if (status)
1102                 return status;
1103
1104         return rsi_init_dbgfs(adapter);
1105 }