1 /** 2 * Copyright (c) 2014 Redpine Signals Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/etherdevice.h> 18 #include "rsi_debugfs.h" 19 #include "rsi_mgmt.h" 20 #include "rsi_common.h" 21 22 static const struct ieee80211_channel rsi_2ghz_channels[] = { 23 { .band = NL80211_BAND_2GHZ, .center_freq = 2412, 24 .hw_value = 1 }, /* Channel 1 */ 25 { .band = NL80211_BAND_2GHZ, .center_freq = 2417, 26 .hw_value = 2 }, /* Channel 2 */ 27 { .band = NL80211_BAND_2GHZ, .center_freq = 2422, 28 .hw_value = 3 }, /* Channel 3 */ 29 { .band = NL80211_BAND_2GHZ, .center_freq = 2427, 30 .hw_value = 4 }, /* Channel 4 */ 31 { .band = NL80211_BAND_2GHZ, .center_freq = 2432, 32 .hw_value = 5 }, /* Channel 5 */ 33 { .band = NL80211_BAND_2GHZ, .center_freq = 2437, 34 .hw_value = 6 }, /* Channel 6 */ 35 { .band = NL80211_BAND_2GHZ, .center_freq = 2442, 36 .hw_value = 7 }, /* Channel 7 */ 37 { .band = NL80211_BAND_2GHZ, .center_freq = 2447, 38 .hw_value = 8 }, /* Channel 8 */ 39 { .band = NL80211_BAND_2GHZ, .center_freq = 2452, 40 .hw_value = 9 }, /* Channel 9 */ 41 { .band = NL80211_BAND_2GHZ, .center_freq = 2457, 42 .hw_value = 10 }, /* Channel 10 */ 43 { .band = NL80211_BAND_2GHZ, .center_freq = 2462, 44 .hw_value = 11 }, /* Channel 11 */ 45 { .band = NL80211_BAND_2GHZ, .center_freq = 2467, 46 .hw_value = 12 }, /* Channel 12 */ 47 { .band = NL80211_BAND_2GHZ, .center_freq = 2472, 48 .hw_value = 13 }, /* Channel 13 */ 49 { .band = NL80211_BAND_2GHZ, .center_freq = 2484, 50 .hw_value = 14 }, /* Channel 14 */ 51 }; 52 53 static const struct ieee80211_channel rsi_5ghz_channels[] = { 54 { .band = NL80211_BAND_5GHZ, .center_freq = 5180, 55 .hw_value = 36, }, /* Channel 36 */ 56 { .band = NL80211_BAND_5GHZ, .center_freq = 5200, 57 .hw_value = 40, }, /* Channel 40 */ 58 { .band = NL80211_BAND_5GHZ, .center_freq = 5220, 59 .hw_value = 44, }, /* Channel 44 */ 60 { .band = NL80211_BAND_5GHZ, .center_freq = 5240, 61 .hw_value = 48, }, /* Channel 48 */ 62 { .band = NL80211_BAND_5GHZ, .center_freq = 5260, 63 .hw_value = 52, }, /* Channel 52 */ 64 { .band = NL80211_BAND_5GHZ, .center_freq = 5280, 65 .hw_value = 56, }, /* Channel 56 */ 66 { .band = NL80211_BAND_5GHZ, .center_freq = 5300, 67 .hw_value = 60, }, /* Channel 60 */ 68 { .band = NL80211_BAND_5GHZ, .center_freq = 5320, 69 .hw_value = 64, }, /* Channel 64 */ 70 { .band = NL80211_BAND_5GHZ, .center_freq = 5500, 71 .hw_value = 100, }, /* Channel 100 */ 72 { .band = NL80211_BAND_5GHZ, .center_freq = 5520, 73 .hw_value = 104, }, /* Channel 104 */ 74 { .band = NL80211_BAND_5GHZ, .center_freq = 5540, 75 .hw_value = 108, }, /* Channel 108 */ 76 { .band = NL80211_BAND_5GHZ, .center_freq = 5560, 77 .hw_value = 112, }, /* Channel 112 */ 78 { .band = NL80211_BAND_5GHZ, .center_freq = 5580, 79 .hw_value = 116, }, /* Channel 116 */ 80 { .band = NL80211_BAND_5GHZ, .center_freq = 5600, 81 .hw_value = 120, }, /* Channel 120 */ 82 { .band = NL80211_BAND_5GHZ, .center_freq = 5620, 83 .hw_value = 124, }, /* Channel 124 */ 84 { .band = NL80211_BAND_5GHZ, .center_freq = 5640, 85 .hw_value = 128, }, /* Channel 128 */ 86 { .band = NL80211_BAND_5GHZ, .center_freq = 5660, 87 .hw_value = 132, }, /* Channel 132 */ 88 { .band = NL80211_BAND_5GHZ, .center_freq = 5680, 89 .hw_value = 136, }, /* Channel 136 */ 90 { .band = NL80211_BAND_5GHZ, .center_freq = 5700, 91 .hw_value = 140, }, /* Channel 140 */ 92 { .band = NL80211_BAND_5GHZ, .center_freq = 5745, 93 .hw_value = 149, }, /* Channel 149 */ 94 { .band = NL80211_BAND_5GHZ, .center_freq = 5765, 95 .hw_value = 153, }, /* Channel 153 */ 96 { .band = NL80211_BAND_5GHZ, .center_freq = 5785, 97 .hw_value = 157, }, /* Channel 157 */ 98 { .band = NL80211_BAND_5GHZ, .center_freq = 5805, 99 .hw_value = 161, }, /* Channel 161 */ 100 { .band = NL80211_BAND_5GHZ, .center_freq = 5825, 101 .hw_value = 165, }, /* Channel 165 */ 102 }; 103 104 struct ieee80211_rate rsi_rates[12] = { 105 { .bitrate = STD_RATE_01 * 5, .hw_value = RSI_RATE_1 }, 106 { .bitrate = STD_RATE_02 * 5, .hw_value = RSI_RATE_2 }, 107 { .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 }, 108 { .bitrate = STD_RATE_11 * 5, .hw_value = RSI_RATE_11 }, 109 { .bitrate = STD_RATE_06 * 5, .hw_value = RSI_RATE_6 }, 110 { .bitrate = STD_RATE_09 * 5, .hw_value = RSI_RATE_9 }, 111 { .bitrate = STD_RATE_12 * 5, .hw_value = RSI_RATE_12 }, 112 { .bitrate = STD_RATE_18 * 5, .hw_value = RSI_RATE_18 }, 113 { .bitrate = STD_RATE_24 * 5, .hw_value = RSI_RATE_24 }, 114 { .bitrate = STD_RATE_36 * 5, .hw_value = RSI_RATE_36 }, 115 { .bitrate = STD_RATE_48 * 5, .hw_value = RSI_RATE_48 }, 116 { .bitrate = STD_RATE_54 * 5, .hw_value = RSI_RATE_54 }, 117 }; 118 119 const u16 rsi_mcsrates[8] = { 120 RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3, 121 RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7 122 }; 123 124 /** 125 * rsi_is_cipher_wep() - This function determines if the cipher is WEP or not. 126 * @common: Pointer to the driver private structure. 127 * 128 * Return: If cipher type is WEP, a value of 1 is returned, else 0. 129 */ 130 131 bool rsi_is_cipher_wep(struct rsi_common *common) 132 { 133 if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) || 134 (common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) && 135 (!common->secinfo.ptk_cipher)) 136 return true; 137 else 138 return false; 139 } 140 141 /** 142 * rsi_register_rates_channels() - This function registers channels and rates. 143 * @adapter: Pointer to the adapter structure. 144 * @band: Operating band to be set. 145 * 146 * Return: None. 147 */ 148 static void rsi_register_rates_channels(struct rsi_hw *adapter, int band) 149 { 150 struct ieee80211_supported_band *sbands = &adapter->sbands[band]; 151 void *channels = NULL; 152 153 if (band == NL80211_BAND_2GHZ) { 154 channels = kmalloc(sizeof(rsi_2ghz_channels), GFP_KERNEL); 155 memcpy(channels, 156 rsi_2ghz_channels, 157 sizeof(rsi_2ghz_channels)); 158 sbands->band = NL80211_BAND_2GHZ; 159 sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels); 160 sbands->bitrates = rsi_rates; 161 sbands->n_bitrates = ARRAY_SIZE(rsi_rates); 162 } else { 163 channels = kmalloc(sizeof(rsi_5ghz_channels), GFP_KERNEL); 164 memcpy(channels, 165 rsi_5ghz_channels, 166 sizeof(rsi_5ghz_channels)); 167 sbands->band = NL80211_BAND_5GHZ; 168 sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels); 169 sbands->bitrates = &rsi_rates[4]; 170 sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4; 171 } 172 173 sbands->channels = channels; 174 175 memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap)); 176 sbands->ht_cap.ht_supported = true; 177 sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 178 IEEE80211_HT_CAP_SGI_20 | 179 IEEE80211_HT_CAP_SGI_40); 180 sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K; 181 sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE; 182 sbands->ht_cap.mcs.rx_mask[0] = 0xff; 183 sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; 184 /* sbands->ht_cap.mcs.rx_highest = 0x82; */ 185 } 186 187 /** 188 * rsi_mac80211_detach() - This function is used to de-initialize the 189 * Mac80211 stack. 190 * @adapter: Pointer to the adapter structure. 191 * 192 * Return: None. 193 */ 194 void rsi_mac80211_detach(struct rsi_hw *adapter) 195 { 196 struct ieee80211_hw *hw = adapter->hw; 197 198 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 * @params: Pointer to A-MPDU action parameters 663 * 664 * Return: status: 0 on success, negative error code on failure. 665 */ 666 static 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 = ¶ms->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 */ 751 static 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 */ 772 static 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 */ 801 static 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 */ 836 static 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 */ 893 void 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 } 910 911 static 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 */ 960 static 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 */ 993 static 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 1015 static 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 */ 1039 int 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