linux/drivers/net/wireless/rsi/rsi_91x_mac80211.c
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   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
  22static 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
  53static 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
 104struct 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
 119const 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
 131bool 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 */
 148static 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 */
 194void 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}
 206EXPORT_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 */
 216void 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 */
 240static 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 */
 258static 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 */
 276static 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 */
 294static 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 */
 328static 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 */
 351static 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 */
 405static 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 */
 429u16 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 */
 452static 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 */
 491static 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 */
 511static 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 */
 563static 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 */
 608static 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 * @params: Pointer to A-MPDU action parameters
 663 *
 664 * Return: status: 0 on success, negative error code on failure.
 665 */
 666static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
 667                                     struct ieee80211_vif *vif,
 668                                     struct ieee80211_ampdu_params *params)
 669{
 670        int status = -EOPNOTSUPP;
 671        struct rsi_hw *adapter = hw->priv;
 672        struct rsi_common *common = adapter->priv;
 673        u16 seq_no = 0;
 674        u8 ii = 0;
 675        struct ieee80211_sta *sta = params->sta;
 676        enum ieee80211_ampdu_mlme_action action = params->action;
 677        u16 tid = params->tid;
 678        u16 *ssn = &params->ssn;
 679        u8 buf_size = params->buf_size;
 680
 681        for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
 682                if (vif == adapter->vifs[ii])
 683                        break;
 684        }
 685
 686        mutex_lock(&common->mutex);
 687        rsi_dbg(INFO_ZONE, "%s: AMPDU action %d called\n", __func__, action);
 688        if (ssn != NULL)
 689                seq_no = *ssn;
 690
 691        switch (action) {
 692        case IEEE80211_AMPDU_RX_START:
 693                status = rsi_send_aggregation_params_frame(common,
 694                                                           tid,
 695                                                           seq_no,
 696                                                           buf_size,
 697                                                           STA_RX_ADDBA_DONE);
 698                break;
 699
 700        case IEEE80211_AMPDU_RX_STOP:
 701                status = rsi_send_aggregation_params_frame(common,
 702                                                           tid,
 703                                                           0,
 704                                                           buf_size,
 705                                                           STA_RX_DELBA);
 706                break;
 707
 708        case IEEE80211_AMPDU_TX_START:
 709                common->vif_info[ii].seq_start = seq_no;
 710                ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 711                status = 0;
 712                break;
 713
 714        case IEEE80211_AMPDU_TX_STOP_CONT:
 715        case IEEE80211_AMPDU_TX_STOP_FLUSH:
 716        case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 717                status = rsi_send_aggregation_params_frame(common,
 718                                                           tid,
 719                                                           seq_no,
 720                                                           buf_size,
 721                                                           STA_TX_DELBA);
 722                if (!status)
 723                        ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 724                break;
 725
 726        case IEEE80211_AMPDU_TX_OPERATIONAL:
 727                status = rsi_send_aggregation_params_frame(common,
 728                                                           tid,
 729                                                           common->vif_info[ii]
 730                                                                .seq_start,
 731                                                           buf_size,
 732                                                           STA_TX_ADDBA_DONE);
 733                break;
 734
 735        default:
 736                rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
 737                break;
 738        }
 739
 740        mutex_unlock(&common->mutex);
 741        return status;
 742}
 743
 744/**
 745 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
 746 * @hw: Pointer to the ieee80211_hw structure.
 747 * @value: Rts threshold value.
 748 *
 749 * Return: 0 on success.
 750 */
 751static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
 752                                          u32 value)
 753{
 754        struct rsi_hw *adapter = hw->priv;
 755        struct rsi_common *common = adapter->priv;
 756
 757        mutex_lock(&common->mutex);
 758        common->rts_threshold = value;
 759        mutex_unlock(&common->mutex);
 760
 761        return 0;
 762}
 763
 764/**
 765 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
 766 * @hw: Pointer to the ieee80211_hw structure
 767 * @vif: Pointer to the ieee80211_vif structure.
 768 * @mask: Pointer to the cfg80211_bitrate_mask structure.
 769 *
 770 * Return: 0 on success.
 771 */
 772static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
 773                                      struct ieee80211_vif *vif,
 774                                      const struct cfg80211_bitrate_mask *mask)
 775{
 776        struct rsi_hw *adapter = hw->priv;
 777        struct rsi_common *common = adapter->priv;
 778        enum nl80211_band band = hw->conf.chandef.chan->band;
 779
 780        mutex_lock(&common->mutex);
 781        common->fixedrate_mask[band] = 0;
 782
 783        if (mask->control[band].legacy == 0xfff) {
 784                common->fixedrate_mask[band] =
 785                        (mask->control[band].ht_mcs[0] << 12);
 786        } else {
 787                common->fixedrate_mask[band] =
 788                        mask->control[band].legacy;
 789        }
 790        mutex_unlock(&common->mutex);
 791
 792        return 0;
 793}
 794
 795/**
 796 * rsi_perform_cqm() - This function performs cqm.
 797 * @common: Pointer to the driver private structure.
 798 * @bssid: pointer to the bssid.
 799 * @rssi: RSSI value.
 800 */
 801static void rsi_perform_cqm(struct rsi_common *common,
 802                            u8 *bssid,
 803                            s8 rssi)
 804{
 805        struct rsi_hw *adapter = common->priv;
 806        s8 last_event = common->cqm_info.last_cqm_event_rssi;
 807        int thold = common->cqm_info.rssi_thold;
 808        u32 hyst = common->cqm_info.rssi_hyst;
 809        enum nl80211_cqm_rssi_threshold_event event;
 810
 811        if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
 812                event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
 813        else if (rssi > thold &&
 814                 (last_event == 0 || rssi > (last_event + hyst)))
 815                event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
 816        else
 817                return;
 818
 819        common->cqm_info.last_cqm_event_rssi = rssi;
 820        rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
 821        ieee80211_cqm_rssi_notify(adapter->vifs[0], event, GFP_KERNEL);
 822
 823        return;
 824}
 825
 826/**
 827 * rsi_fill_rx_status() - This function fills rx status in
 828 *                        ieee80211_rx_status structure.
 829 * @hw: Pointer to the ieee80211_hw structure.
 830 * @skb: Pointer to the socket buffer structure.
 831 * @common: Pointer to the driver private structure.
 832 * @rxs: Pointer to the ieee80211_rx_status structure.
 833 *
 834 * Return: None.
 835 */
 836static void rsi_fill_rx_status(struct ieee80211_hw *hw,
 837                               struct sk_buff *skb,
 838                               struct rsi_common *common,
 839                               struct ieee80211_rx_status *rxs)
 840{
 841        struct ieee80211_bss_conf *bss = &common->priv->vifs[0]->bss_conf;
 842        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 843        struct skb_info *rx_params = (struct skb_info *)info->driver_data;
 844        struct ieee80211_hdr *hdr;
 845        char rssi = rx_params->rssi;
 846        u8 hdrlen = 0;
 847        u8 channel = rx_params->channel;
 848        s32 freq;
 849
 850        hdr = ((struct ieee80211_hdr *)(skb->data));
 851        hdrlen = ieee80211_hdrlen(hdr->frame_control);
 852
 853        memset(info, 0, sizeof(struct ieee80211_tx_info));
 854
 855        rxs->signal = -(rssi);
 856
 857        rxs->band = common->band;
 858
 859        freq = ieee80211_channel_to_frequency(channel, rxs->band);
 860
 861        if (freq)
 862                rxs->freq = freq;
 863
 864        if (ieee80211_has_protected(hdr->frame_control)) {
 865                if (rsi_is_cipher_wep(common)) {
 866                        memmove(skb->data + 4, skb->data, hdrlen);
 867                        skb_pull(skb, 4);
 868                } else {
 869                        memmove(skb->data + 8, skb->data, hdrlen);
 870                        skb_pull(skb, 8);
 871                        rxs->flag |= RX_FLAG_MMIC_STRIPPED;
 872                }
 873                rxs->flag |= RX_FLAG_DECRYPTED;
 874                rxs->flag |= RX_FLAG_IV_STRIPPED;
 875        }
 876
 877        /* CQM only for connected AP beacons, the RSSI is a weighted avg */
 878        if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
 879                if (ieee80211_is_beacon(hdr->frame_control))
 880                        rsi_perform_cqm(common, hdr->addr2, rxs->signal);
 881        }
 882
 883        return;
 884}
 885
 886/**
 887 * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
 888 * @common: Pointer to the driver private structure.
 889 * @skb: Pointer to the socket buffer structure.
 890 *
 891 * Return: None.
 892 */
 893void rsi_indicate_pkt_to_os(struct rsi_common *common,
 894                            struct sk_buff *skb)
 895{
 896        struct rsi_hw *adapter = common->priv;
 897        struct ieee80211_hw *hw = adapter->hw;
 898        struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
 899
 900        if ((common->iface_down) || (!adapter->sc_nvifs)) {
 901                dev_kfree_skb(skb);
 902                return;
 903        }
 904
 905        /* filling in the ieee80211_rx_status flags */
 906        rsi_fill_rx_status(hw, skb, common, rx_status);
 907
 908        ieee80211_rx_irqsafe(hw, skb);
 909}
 910
 911static void rsi_set_min_rate(struct ieee80211_hw *hw,
 912                             struct ieee80211_sta *sta,
 913                             struct rsi_common *common)
 914{
 915        u8 band = hw->conf.chandef.chan->band;
 916        u8 ii;
 917        u32 rate_bitmap;
 918        bool matched = false;
 919
 920        common->bitrate_mask[band] = sta->supp_rates[band];
 921
 922        rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
 923
 924        if (rate_bitmap & 0xfff) {
 925                /* Find out the min rate */
 926                for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
 927                        if (rate_bitmap & BIT(ii)) {
 928                                common->min_rate = rsi_rates[ii].hw_value;
 929                                matched = true;
 930                                break;
 931                        }
 932                }
 933        }
 934
 935        common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
 936
 937        if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
 938                for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
 939                        if ((rate_bitmap >> 12) & BIT(ii)) {
 940                                common->min_rate = rsi_mcsrates[ii];
 941                                matched = true;
 942                                break;
 943                        }
 944                }
 945        }
 946
 947        if (!matched)
 948                common->min_rate = 0xffff;
 949}
 950
 951/**
 952 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
 953 *                          connected.
 954 * @hw: pointer to the ieee80211_hw structure.
 955 * @vif: Pointer to the ieee80211_vif structure.
 956 * @sta: Pointer to the ieee80211_sta structure.
 957 *
 958 * Return: 0 on success, -1 on failure.
 959 */
 960static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
 961                                struct ieee80211_vif *vif,
 962                                struct ieee80211_sta *sta)
 963{
 964        struct rsi_hw *adapter = hw->priv;
 965        struct rsi_common *common = adapter->priv;
 966
 967        mutex_lock(&common->mutex);
 968
 969        rsi_set_min_rate(hw, sta, common);
 970
 971        if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
 972            (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)) {
 973                common->vif_info[0].sgi = true;
 974        }
 975
 976        if (sta->ht_cap.ht_supported)
 977                ieee80211_start_tx_ba_session(sta, 0, 0);
 978
 979        mutex_unlock(&common->mutex);
 980
 981        return 0;
 982}
 983
 984/**
 985 * rsi_mac80211_sta_remove() - This function notifies driver about a peer
 986 *                             getting disconnected.
 987 * @hw: Pointer to the ieee80211_hw structure.
 988 * @vif: Pointer to the ieee80211_vif structure.
 989 * @sta: Pointer to the ieee80211_sta structure.
 990 *
 991 * Return: 0 on success, -1 on failure.
 992 */
 993static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
 994                                   struct ieee80211_vif *vif,
 995                                   struct ieee80211_sta *sta)
 996{
 997        struct rsi_hw *adapter = hw->priv;
 998        struct rsi_common *common = adapter->priv;
 999
1000        mutex_lock(&common->mutex);
1001        /* Resetting all the fields to default values */
1002        common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1003        common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1004        common->min_rate = 0xffff;
1005        common->vif_info[0].is_ht = false;
1006        common->vif_info[0].sgi = false;
1007        common->vif_info[0].seq_start = 0;
1008        common->secinfo.ptk_cipher = 0;
1009        common->secinfo.gtk_cipher = 0;
1010        mutex_unlock(&common->mutex);
1011
1012        return 0;
1013}
1014
1015static struct ieee80211_ops mac80211_ops = {
1016        .tx = rsi_mac80211_tx,
1017        .start = rsi_mac80211_start,
1018        .stop = rsi_mac80211_stop,
1019        .add_interface = rsi_mac80211_add_interface,
1020        .remove_interface = rsi_mac80211_remove_interface,
1021        .config = rsi_mac80211_config,
1022        .bss_info_changed = rsi_mac80211_bss_info_changed,
1023        .conf_tx = rsi_mac80211_conf_tx,
1024        .configure_filter = rsi_mac80211_conf_filter,
1025        .set_key = rsi_mac80211_set_key,
1026        .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1027        .set_bitrate_mask = rsi_mac80211_set_rate_mask,
1028        .ampdu_action = rsi_mac80211_ampdu_action,
1029        .sta_add = rsi_mac80211_sta_add,
1030        .sta_remove = rsi_mac80211_sta_remove,
1031};
1032
1033/**
1034 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1035 * @common: Pointer to the driver private structure.
1036 *
1037 * Return: 0 on success, -1 on failure.
1038 */
1039int rsi_mac80211_attach(struct rsi_common *common)
1040{
1041        int status = 0;
1042        struct ieee80211_hw *hw = NULL;
1043        struct wiphy *wiphy = NULL;
1044        struct rsi_hw *adapter = common->priv;
1045        u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
1046
1047        rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
1048
1049        hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
1050        if (!hw) {
1051                rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
1052                return -ENOMEM;
1053        }
1054
1055        wiphy = hw->wiphy;
1056
1057        SET_IEEE80211_DEV(hw, adapter->device);
1058
1059        hw->priv = adapter;
1060        adapter->hw = hw;
1061
1062        ieee80211_hw_set(hw, SIGNAL_DBM);
1063        ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1064        ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1065
1066        hw->queues = MAX_HW_QUEUES;
1067        hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
1068
1069        hw->max_rates = 1;
1070        hw->max_rate_tries = MAX_RETRIES;
1071
1072        hw->max_tx_aggregation_subframes = 6;
1073        rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
1074        rsi_register_rates_channels(adapter, NL80211_BAND_5GHZ);
1075        hw->rate_control_algorithm = "AARF";
1076
1077        SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
1078        ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
1079
1080        wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1081        wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1082        wiphy->retry_short = RETRY_SHORT;
1083        wiphy->retry_long  = RETRY_LONG;
1084        wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1085        wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1086        wiphy->flags = 0;
1087
1088        wiphy->available_antennas_rx = 1;
1089        wiphy->available_antennas_tx = 1;
1090        wiphy->bands[NL80211_BAND_2GHZ] =
1091                &adapter->sbands[NL80211_BAND_2GHZ];
1092        wiphy->bands[NL80211_BAND_5GHZ] =
1093                &adapter->sbands[NL80211_BAND_5GHZ];
1094
1095        status = ieee80211_register_hw(hw);
1096        if (status)
1097                return status;
1098
1099        return rsi_init_dbgfs(adapter);
1100}
1101