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 = 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 53static 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 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 == 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 */ 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 * @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 * 668 * Return: status: 0 on success, negative error code on failure. 669 */ 670static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw, 671 struct ieee80211_vif *vif, 672 enum ieee80211_ampdu_mlme_action action, 673 struct ieee80211_sta *sta, 674 unsigned short tid, 675 unsigned short *ssn, 676 unsigned char buf_size) 677{ 678 int status = -EOPNOTSUPP; 679 struct rsi_hw *adapter = hw->priv; 680 struct rsi_common *common = adapter->priv; 681 u16 seq_no = 0; 682 u8 ii = 0; 683 684 for (ii = 0; ii < RSI_MAX_VIFS; ii++) { 685 if (vif == adapter->vifs[ii]) 686 break; 687 } 688 689 mutex_lock(&common->mutex); 690 rsi_dbg(INFO_ZONE, "%s: AMPDU action %d called\n", __func__, action); 691 if (ssn != NULL) 692 seq_no = *ssn; 693 694 switch (action) { 695 case IEEE80211_AMPDU_RX_START: 696 status = rsi_send_aggregation_params_frame(common, 697 tid, 698 seq_no, 699 buf_size, 700 STA_RX_ADDBA_DONE); 701 break; 702 703 case IEEE80211_AMPDU_RX_STOP: 704 status = rsi_send_aggregation_params_frame(common, 705 tid, 706 0, 707 buf_size, 708 STA_RX_DELBA); 709 break; 710 711 case IEEE80211_AMPDU_TX_START: 712 common->vif_info[ii].seq_start = seq_no; 713 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 714 status = 0; 715 break; 716 717 case IEEE80211_AMPDU_TX_STOP_CONT: 718 case IEEE80211_AMPDU_TX_STOP_FLUSH: 719 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 720 status = rsi_send_aggregation_params_frame(common, 721 tid, 722 seq_no, 723 buf_size, 724 STA_TX_DELBA); 725 if (!status) 726 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 727 break; 728 729 case IEEE80211_AMPDU_TX_OPERATIONAL: 730 status = rsi_send_aggregation_params_frame(common, 731 tid, 732 common->vif_info[ii] 733 .seq_start, 734 buf_size, 735 STA_TX_ADDBA_DONE); 736 break; 737 738 default: 739 rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__); 740 break; 741 } 742 743 mutex_unlock(&common->mutex); 744 return status; 745} 746 747/** 748 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value. 749 * @hw: Pointer to the ieee80211_hw structure. 750 * @value: Rts threshold value. 751 * 752 * Return: 0 on success. 753 */ 754static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw, 755 u32 value) 756{ 757 struct rsi_hw *adapter = hw->priv; 758 struct rsi_common *common = adapter->priv; 759 760 mutex_lock(&common->mutex); 761 common->rts_threshold = value; 762 mutex_unlock(&common->mutex); 763 764 return 0; 765} 766 767/** 768 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used. 769 * @hw: Pointer to the ieee80211_hw structure 770 * @vif: Pointer to the ieee80211_vif structure. 771 * @mask: Pointer to the cfg80211_bitrate_mask structure. 772 * 773 * Return: 0 on success. 774 */ 775static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw, 776 struct ieee80211_vif *vif, 777 const struct cfg80211_bitrate_mask *mask) 778{ 779 struct rsi_hw *adapter = hw->priv; 780 struct rsi_common *common = adapter->priv; 781 enum ieee80211_band band = hw->conf.chandef.chan->band; 782 783 mutex_lock(&common->mutex); 784 common->fixedrate_mask[band] = 0; 785 786 if (mask->control[band].legacy == 0xfff) { 787 common->fixedrate_mask[band] = 788 (mask->control[band].ht_mcs[0] << 12); 789 } else { 790 common->fixedrate_mask[band] = 791 mask->control[band].legacy; 792 } 793 mutex_unlock(&common->mutex); 794 795 return 0; 796} 797 798/** 799 * rsi_perform_cqm() - This function performs cqm. 800 * @common: Pointer to the driver private structure. 801 * @bssid: pointer to the bssid. 802 * @rssi: RSSI value. 803 */ 804static void rsi_perform_cqm(struct rsi_common *common, 805 u8 *bssid, 806 s8 rssi) 807{ 808 struct rsi_hw *adapter = common->priv; 809 s8 last_event = common->cqm_info.last_cqm_event_rssi; 810 int thold = common->cqm_info.rssi_thold; 811 u32 hyst = common->cqm_info.rssi_hyst; 812 enum nl80211_cqm_rssi_threshold_event event; 813 814 if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst))) 815 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW; 816 else if (rssi > thold && 817 (last_event == 0 || rssi > (last_event + hyst))) 818 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH; 819 else 820 return; 821 822 common->cqm_info.last_cqm_event_rssi = rssi; 823 rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event); 824 ieee80211_cqm_rssi_notify(adapter->vifs[0], event, GFP_KERNEL); 825 826 return; 827} 828 829/** 830 * rsi_fill_rx_status() - This function fills rx status in 831 * ieee80211_rx_status structure. 832 * @hw: Pointer to the ieee80211_hw structure. 833 * @skb: Pointer to the socket buffer structure. 834 * @common: Pointer to the driver private structure. 835 * @rxs: Pointer to the ieee80211_rx_status structure. 836 * 837 * Return: None. 838 */ 839static void rsi_fill_rx_status(struct ieee80211_hw *hw, 840 struct sk_buff *skb, 841 struct rsi_common *common, 842 struct ieee80211_rx_status *rxs) 843{ 844 struct ieee80211_bss_conf *bss = &common->priv->vifs[0]->bss_conf; 845 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 846 struct skb_info *rx_params = (struct skb_info *)info->driver_data; 847 struct ieee80211_hdr *hdr; 848 char rssi = rx_params->rssi; 849 u8 hdrlen = 0; 850 u8 channel = rx_params->channel; 851 s32 freq; 852 853 hdr = ((struct ieee80211_hdr *)(skb->data)); 854 hdrlen = ieee80211_hdrlen(hdr->frame_control); 855 856 memset(info, 0, sizeof(struct ieee80211_tx_info)); 857 858 rxs->signal = -(rssi); 859 860 rxs->band = common->band; 861 862 freq = ieee80211_channel_to_frequency(channel, rxs->band); 863 864 if (freq) 865 rxs->freq = freq; 866 867 if (ieee80211_has_protected(hdr->frame_control)) { 868 if (rsi_is_cipher_wep(common)) { 869 memmove(skb->data + 4, skb->data, hdrlen); 870 skb_pull(skb, 4); 871 } else { 872 memmove(skb->data + 8, skb->data, hdrlen); 873 skb_pull(skb, 8); 874 rxs->flag |= RX_FLAG_MMIC_STRIPPED; 875 } 876 rxs->flag |= RX_FLAG_DECRYPTED; 877 rxs->flag |= RX_FLAG_IV_STRIPPED; 878 } 879 880 /* CQM only for connected AP beacons, the RSSI is a weighted avg */ 881 if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) { 882 if (ieee80211_is_beacon(hdr->frame_control)) 883 rsi_perform_cqm(common, hdr->addr2, rxs->signal); 884 } 885 886 return; 887} 888 889/** 890 * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211. 891 * @common: Pointer to the driver private structure. 892 * @skb: Pointer to the socket buffer structure. 893 * 894 * Return: None. 895 */ 896void rsi_indicate_pkt_to_os(struct rsi_common *common, 897 struct sk_buff *skb) 898{ 899 struct rsi_hw *adapter = common->priv; 900 struct ieee80211_hw *hw = adapter->hw; 901 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 902 903 if ((common->iface_down) || (!adapter->sc_nvifs)) { 904 dev_kfree_skb(skb); 905 return; 906 } 907 908 /* filling in the ieee80211_rx_status flags */ 909 rsi_fill_rx_status(hw, skb, common, rx_status); 910 911 ieee80211_rx_irqsafe(hw, skb); 912} 913 914static void rsi_set_min_rate(struct ieee80211_hw *hw, 915 struct ieee80211_sta *sta, 916 struct rsi_common *common) 917{ 918 u8 band = hw->conf.chandef.chan->band; 919 u8 ii; 920 u32 rate_bitmap; 921 bool matched = false; 922 923 common->bitrate_mask[band] = sta->supp_rates[band]; 924 925 rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]); 926 927 if (rate_bitmap & 0xfff) { 928 /* Find out the min rate */ 929 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) { 930 if (rate_bitmap & BIT(ii)) { 931 common->min_rate = rsi_rates[ii].hw_value; 932 matched = true; 933 break; 934 } 935 } 936 } 937 938 common->vif_info[0].is_ht = sta->ht_cap.ht_supported; 939 940 if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) { 941 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) { 942 if ((rate_bitmap >> 12) & BIT(ii)) { 943 common->min_rate = rsi_mcsrates[ii]; 944 matched = true; 945 break; 946 } 947 } 948 } 949 950 if (!matched) 951 common->min_rate = 0xffff; 952} 953 954/** 955 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting 956 * connected. 957 * @hw: pointer to the ieee80211_hw structure. 958 * @vif: Pointer to the ieee80211_vif structure. 959 * @sta: Pointer to the ieee80211_sta structure. 960 * 961 * Return: 0 on success, -1 on failure. 962 */ 963static int rsi_mac80211_sta_add(struct ieee80211_hw *hw, 964 struct ieee80211_vif *vif, 965 struct ieee80211_sta *sta) 966{ 967 struct rsi_hw *adapter = hw->priv; 968 struct rsi_common *common = adapter->priv; 969 970 mutex_lock(&common->mutex); 971 972 rsi_set_min_rate(hw, sta, common); 973 974 if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) || 975 (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)) { 976 common->vif_info[0].sgi = true; 977 } 978 979 if (sta->ht_cap.ht_supported) 980 ieee80211_start_tx_ba_session(sta, 0, 0); 981 982 mutex_unlock(&common->mutex); 983 984 return 0; 985} 986 987/** 988 * rsi_mac80211_sta_remove() - This function notifies driver about a peer 989 * getting disconnected. 990 * @hw: Pointer to the ieee80211_hw structure. 991 * @vif: Pointer to the ieee80211_vif structure. 992 * @sta: Pointer to the ieee80211_sta structure. 993 * 994 * Return: 0 on success, -1 on failure. 995 */ 996static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw, 997 struct ieee80211_vif *vif, 998 struct ieee80211_sta *sta) 999{ 1000 struct rsi_hw *adapter = hw->priv; 1001 struct rsi_common *common = adapter->priv; 1002 1003 mutex_lock(&common->mutex); 1004 /* Resetting all the fields to default values */ 1005 common->bitrate_mask[IEEE80211_BAND_2GHZ] = 0; 1006 common->bitrate_mask[IEEE80211_BAND_5GHZ] = 0; 1007 common->min_rate = 0xffff; 1008 common->vif_info[0].is_ht = false; 1009 common->vif_info[0].sgi = false; 1010 common->vif_info[0].seq_start = 0; 1011 common->secinfo.ptk_cipher = 0; 1012 common->secinfo.gtk_cipher = 0; 1013 mutex_unlock(&common->mutex); 1014 1015 return 0; 1016} 1017 1018static struct ieee80211_ops mac80211_ops = { 1019 .tx = rsi_mac80211_tx, 1020 .start = rsi_mac80211_start, 1021 .stop = rsi_mac80211_stop, 1022 .add_interface = rsi_mac80211_add_interface, 1023 .remove_interface = rsi_mac80211_remove_interface, 1024 .config = rsi_mac80211_config, 1025 .bss_info_changed = rsi_mac80211_bss_info_changed, 1026 .conf_tx = rsi_mac80211_conf_tx, 1027 .configure_filter = rsi_mac80211_conf_filter, 1028 .set_key = rsi_mac80211_set_key, 1029 .set_rts_threshold = rsi_mac80211_set_rts_threshold, 1030 .set_bitrate_mask = rsi_mac80211_set_rate_mask, 1031 .ampdu_action = rsi_mac80211_ampdu_action, 1032 .sta_add = rsi_mac80211_sta_add, 1033 .sta_remove = rsi_mac80211_sta_remove, 1034}; 1035 1036/** 1037 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack. 1038 * @common: Pointer to the driver private structure. 1039 * 1040 * Return: 0 on success, -1 on failure. 1041 */ 1042int rsi_mac80211_attach(struct rsi_common *common) 1043{ 1044 int status = 0; 1045 struct ieee80211_hw *hw = NULL; 1046 struct wiphy *wiphy = NULL; 1047 struct rsi_hw *adapter = common->priv; 1048 u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3}; 1049 1050 rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__); 1051 1052 hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops); 1053 if (!hw) { 1054 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__); 1055 return -ENOMEM; 1056 } 1057 1058 wiphy = hw->wiphy; 1059 1060 SET_IEEE80211_DEV(hw, adapter->device); 1061 1062 hw->priv = adapter; 1063 adapter->hw = hw; 1064 1065 hw->flags = IEEE80211_HW_SIGNAL_DBM | 1066 IEEE80211_HW_HAS_RATE_CONTROL | 1067 IEEE80211_HW_AMPDU_AGGREGATION | 1068 0; 1069 1070 hw->queues = MAX_HW_QUEUES; 1071 hw->extra_tx_headroom = RSI_NEEDED_HEADROOM; 1072 1073 hw->max_rates = 1; 1074 hw->max_rate_tries = MAX_RETRIES; 1075 1076 hw->max_tx_aggregation_subframes = 6; 1077 rsi_register_rates_channels(adapter, IEEE80211_BAND_2GHZ); 1078 rsi_register_rates_channels(adapter, IEEE80211_BAND_5GHZ); 1079 hw->rate_control_algorithm = "AARF"; 1080 1081 SET_IEEE80211_PERM_ADDR(hw, common->mac_addr); 1082 ether_addr_copy(hw->wiphy->addr_mask, addr_mask); 1083 1084 wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION); 1085 wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1086 wiphy->retry_short = RETRY_SHORT; 1087 wiphy->retry_long = RETRY_LONG; 1088 wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD; 1089 wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; 1090 wiphy->flags = 0; 1091 1092 wiphy->available_antennas_rx = 1; 1093 wiphy->available_antennas_tx = 1; 1094 wiphy->bands[IEEE80211_BAND_2GHZ] = 1095 &adapter->sbands[IEEE80211_BAND_2GHZ]; 1096 wiphy->bands[IEEE80211_BAND_5GHZ] = 1097 &adapter->sbands[IEEE80211_BAND_5GHZ]; 1098 1099 status = ieee80211_register_hw(hw); 1100 if (status) 1101 return status; 1102 1103 return rsi_init_dbgfs(adapter); 1104} 1105