1/* 2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> 3 <http://rt2x00.serialmonkey.com> 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, see <http://www.gnu.org/licenses/>. 17 */ 18 19/* 20 Module: rt2x00mac 21 Abstract: rt2x00 generic mac80211 routines. 22 */ 23 24#include <linux/kernel.h> 25#include <linux/module.h> 26 27#include "rt2x00.h" 28#include "rt2x00lib.h" 29 30static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev, 31 struct data_queue *queue, 32 struct sk_buff *frag_skb) 33{ 34 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(frag_skb); 35 struct ieee80211_tx_info *rts_info; 36 struct sk_buff *skb; 37 unsigned int data_length; 38 int retval = 0; 39 40 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 41 data_length = sizeof(struct ieee80211_cts); 42 else 43 data_length = sizeof(struct ieee80211_rts); 44 45 skb = dev_alloc_skb(data_length + rt2x00dev->hw->extra_tx_headroom); 46 if (unlikely(!skb)) { 47 rt2x00_warn(rt2x00dev, "Failed to create RTS/CTS frame\n"); 48 return -ENOMEM; 49 } 50 51 skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom); 52 skb_put(skb, data_length); 53 54 /* 55 * Copy TX information over from original frame to 56 * RTS/CTS frame. Note that we set the no encryption flag 57 * since we don't want this frame to be encrypted. 58 * RTS frames should be acked, while CTS-to-self frames 59 * should not. The ready for TX flag is cleared to prevent 60 * it being automatically send when the descriptor is 61 * written to the hardware. 62 */ 63 memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb)); 64 rts_info = IEEE80211_SKB_CB(skb); 65 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS; 66 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_CTS_PROTECT; 67 68 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 69 rts_info->flags |= IEEE80211_TX_CTL_NO_ACK; 70 else 71 rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK; 72 73 /* Disable hardware encryption */ 74 rts_info->control.hw_key = NULL; 75 76 /* 77 * RTS/CTS frame should use the length of the frame plus any 78 * encryption overhead that will be added by the hardware. 79 */ 80 data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb); 81 82 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 83 ieee80211_ctstoself_get(rt2x00dev->hw, tx_info->control.vif, 84 frag_skb->data, data_length, tx_info, 85 (struct ieee80211_cts *)(skb->data)); 86 else 87 ieee80211_rts_get(rt2x00dev->hw, tx_info->control.vif, 88 frag_skb->data, data_length, tx_info, 89 (struct ieee80211_rts *)(skb->data)); 90 91 retval = rt2x00queue_write_tx_frame(queue, skb, NULL, true); 92 if (retval) { 93 dev_kfree_skb_any(skb); 94 rt2x00_warn(rt2x00dev, "Failed to send RTS/CTS frame\n"); 95 } 96 97 return retval; 98} 99 100void rt2x00mac_tx(struct ieee80211_hw *hw, 101 struct ieee80211_tx_control *control, 102 struct sk_buff *skb) 103{ 104 struct rt2x00_dev *rt2x00dev = hw->priv; 105 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); 106 enum data_queue_qid qid = skb_get_queue_mapping(skb); 107 struct data_queue *queue = NULL; 108 109 /* 110 * Mac80211 might be calling this function while we are trying 111 * to remove the device or perhaps suspending it. 112 * Note that we can only stop the TX queues inside the TX path 113 * due to possible race conditions in mac80211. 114 */ 115 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 116 goto exit_free_skb; 117 118 /* 119 * Use the ATIM queue if appropriate and present. 120 */ 121 if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 122 rt2x00_has_cap_flag(rt2x00dev, REQUIRE_ATIM_QUEUE)) 123 qid = QID_ATIM; 124 125 queue = rt2x00queue_get_tx_queue(rt2x00dev, qid); 126 if (unlikely(!queue)) { 127 rt2x00_err(rt2x00dev, 128 "Attempt to send packet over invalid queue %d\n" 129 "Please file bug report to %s\n", qid, DRV_PROJECT); 130 goto exit_free_skb; 131 } 132 133 /* 134 * If CTS/RTS is required. create and queue that frame first. 135 * Make sure we have at least enough entries available to send 136 * this CTS/RTS frame as well as the data frame. 137 * Note that when the driver has set the set_rts_threshold() 138 * callback function it doesn't need software generation of 139 * either RTS or CTS-to-self frame and handles everything 140 * inside the hardware. 141 */ 142 if (!rt2x00dev->ops->hw->set_rts_threshold && 143 (tx_info->control.rates[0].flags & (IEEE80211_TX_RC_USE_RTS_CTS | 144 IEEE80211_TX_RC_USE_CTS_PROTECT))) { 145 if (rt2x00queue_available(queue) <= 1) 146 goto exit_fail; 147 148 if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb)) 149 goto exit_fail; 150 } 151 152 if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false))) 153 goto exit_fail; 154 155 /* 156 * Pausing queue has to be serialized with rt2x00lib_txdone(). Note 157 * we should not use spin_lock_bh variant as bottom halve was already 158 * disabled before ieee80211_xmit() call. 159 */ 160 spin_lock(&queue->tx_lock); 161 if (rt2x00queue_threshold(queue)) 162 rt2x00queue_pause_queue(queue); 163 spin_unlock(&queue->tx_lock); 164 165 return; 166 167 exit_fail: 168 spin_lock(&queue->tx_lock); 169 rt2x00queue_pause_queue(queue); 170 spin_unlock(&queue->tx_lock); 171 exit_free_skb: 172 ieee80211_free_txskb(hw, skb); 173} 174EXPORT_SYMBOL_GPL(rt2x00mac_tx); 175 176int rt2x00mac_start(struct ieee80211_hw *hw) 177{ 178 struct rt2x00_dev *rt2x00dev = hw->priv; 179 180 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 181 return 0; 182 183 return rt2x00lib_start(rt2x00dev); 184} 185EXPORT_SYMBOL_GPL(rt2x00mac_start); 186 187void rt2x00mac_stop(struct ieee80211_hw *hw) 188{ 189 struct rt2x00_dev *rt2x00dev = hw->priv; 190 191 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 192 return; 193 194 rt2x00lib_stop(rt2x00dev); 195} 196EXPORT_SYMBOL_GPL(rt2x00mac_stop); 197 198int rt2x00mac_add_interface(struct ieee80211_hw *hw, 199 struct ieee80211_vif *vif) 200{ 201 struct rt2x00_dev *rt2x00dev = hw->priv; 202 struct rt2x00_intf *intf = vif_to_intf(vif); 203 struct data_queue *queue = rt2x00dev->bcn; 204 struct queue_entry *entry = NULL; 205 unsigned int i; 206 207 /* 208 * Don't allow interfaces to be added 209 * the device has disappeared. 210 */ 211 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || 212 !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) 213 return -ENODEV; 214 215 /* 216 * Loop through all beacon queues to find a free 217 * entry. Since there are as much beacon entries 218 * as the maximum interfaces, this search shouldn't 219 * fail. 220 */ 221 for (i = 0; i < queue->limit; i++) { 222 entry = &queue->entries[i]; 223 if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags)) 224 break; 225 } 226 227 if (unlikely(i == queue->limit)) 228 return -ENOBUFS; 229 230 /* 231 * We are now absolutely sure the interface can be created, 232 * increase interface count and start initialization. 233 */ 234 235 if (vif->type == NL80211_IFTYPE_AP) 236 rt2x00dev->intf_ap_count++; 237 else 238 rt2x00dev->intf_sta_count++; 239 240 mutex_init(&intf->beacon_skb_mutex); 241 intf->beacon = entry; 242 243 /* 244 * The MAC address must be configured after the device 245 * has been initialized. Otherwise the device can reset 246 * the MAC registers. 247 * The BSSID address must only be configured in AP mode, 248 * however we should not send an empty BSSID address for 249 * STA interfaces at this time, since this can cause 250 * invalid behavior in the device. 251 */ 252 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, 253 vif->addr, NULL); 254 255 /* 256 * Some filters depend on the current working mode. We can force 257 * an update during the next configure_filter() run by mac80211 by 258 * resetting the current packet_filter state. 259 */ 260 rt2x00dev->packet_filter = 0; 261 262 return 0; 263} 264EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); 265 266void rt2x00mac_remove_interface(struct ieee80211_hw *hw, 267 struct ieee80211_vif *vif) 268{ 269 struct rt2x00_dev *rt2x00dev = hw->priv; 270 struct rt2x00_intf *intf = vif_to_intf(vif); 271 272 /* 273 * Don't allow interfaces to be remove while 274 * either the device has disappeared or when 275 * no interface is present. 276 */ 277 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || 278 (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) || 279 (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count)) 280 return; 281 282 if (vif->type == NL80211_IFTYPE_AP) 283 rt2x00dev->intf_ap_count--; 284 else 285 rt2x00dev->intf_sta_count--; 286 287 /* 288 * Release beacon entry so it is available for 289 * new interfaces again. 290 */ 291 clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags); 292 293 /* 294 * Make sure the bssid and mac address registers 295 * are cleared to prevent false ACKing of frames. 296 */ 297 rt2x00lib_config_intf(rt2x00dev, intf, 298 NL80211_IFTYPE_UNSPECIFIED, NULL, NULL); 299} 300EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); 301 302int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed) 303{ 304 struct rt2x00_dev *rt2x00dev = hw->priv; 305 struct ieee80211_conf *conf = &hw->conf; 306 307 /* 308 * mac80211 might be calling this function while we are trying 309 * to remove the device or perhaps suspending it. 310 */ 311 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 312 return 0; 313 314 /* 315 * Some configuration parameters (e.g. channel and antenna values) can 316 * only be set when the radio is enabled, but do require the RX to 317 * be off. During this period we should keep link tuning enabled, 318 * if for any reason the link tuner must be reset, this will be 319 * handled by rt2x00lib_config(). 320 */ 321 rt2x00queue_stop_queue(rt2x00dev->rx); 322 323 /* 324 * When we've just turned on the radio, we want to reprogram 325 * everything to ensure a consistent state 326 */ 327 rt2x00lib_config(rt2x00dev, conf, changed); 328 329 /* 330 * After the radio has been enabled we need to configure 331 * the antenna to the default settings. rt2x00lib_config_antenna() 332 * should determine if any action should be taken based on 333 * checking if diversity has been enabled or no antenna changes 334 * have been made since the last configuration change. 335 */ 336 rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant); 337 338 /* Turn RX back on */ 339 rt2x00queue_start_queue(rt2x00dev->rx); 340 341 return 0; 342} 343EXPORT_SYMBOL_GPL(rt2x00mac_config); 344 345void rt2x00mac_configure_filter(struct ieee80211_hw *hw, 346 unsigned int changed_flags, 347 unsigned int *total_flags, 348 u64 multicast) 349{ 350 struct rt2x00_dev *rt2x00dev = hw->priv; 351 352 /* 353 * Mask off any flags we are going to ignore 354 * from the total_flags field. 355 */ 356 *total_flags &= 357 FIF_ALLMULTI | 358 FIF_FCSFAIL | 359 FIF_PLCPFAIL | 360 FIF_CONTROL | 361 FIF_PSPOLL | 362 FIF_OTHER_BSS | 363 FIF_PROMISC_IN_BSS; 364 365 /* 366 * Apply some rules to the filters: 367 * - Some filters imply different filters to be set. 368 * - Some things we can't filter out at all. 369 * - Multicast filter seems to kill broadcast traffic so never use it. 370 */ 371 *total_flags |= FIF_ALLMULTI; 372 if (*total_flags & FIF_OTHER_BSS || 373 *total_flags & FIF_PROMISC_IN_BSS) 374 *total_flags |= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS; 375 376 /* 377 * If the device has a single filter for all control frames, 378 * FIF_CONTROL and FIF_PSPOLL flags imply each other. 379 * And if the device has more than one filter for control frames 380 * of different types, but has no a separate filter for PS Poll frames, 381 * FIF_CONTROL flag implies FIF_PSPOLL. 382 */ 383 if (!rt2x00_has_cap_control_filters(rt2x00dev)) { 384 if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL) 385 *total_flags |= FIF_CONTROL | FIF_PSPOLL; 386 } 387 if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) { 388 if (*total_flags & FIF_CONTROL) 389 *total_flags |= FIF_PSPOLL; 390 } 391 392 /* 393 * Check if there is any work left for us. 394 */ 395 if (rt2x00dev->packet_filter == *total_flags) 396 return; 397 rt2x00dev->packet_filter = *total_flags; 398 399 rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags); 400} 401EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter); 402 403static void rt2x00mac_set_tim_iter(void *data, u8 *mac, 404 struct ieee80211_vif *vif) 405{ 406 struct rt2x00_intf *intf = vif_to_intf(vif); 407 408 if (vif->type != NL80211_IFTYPE_AP && 409 vif->type != NL80211_IFTYPE_ADHOC && 410 vif->type != NL80211_IFTYPE_MESH_POINT && 411 vif->type != NL80211_IFTYPE_WDS) 412 return; 413 414 set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags); 415} 416 417int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 418 bool set) 419{ 420 struct rt2x00_dev *rt2x00dev = hw->priv; 421 422 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) 423 return 0; 424 425 ieee80211_iterate_active_interfaces_atomic( 426 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 427 rt2x00mac_set_tim_iter, rt2x00dev); 428 429 /* queue work to upodate the beacon template */ 430 ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work); 431 return 0; 432} 433EXPORT_SYMBOL_GPL(rt2x00mac_set_tim); 434 435#ifdef CONFIG_RT2X00_LIB_CRYPTO 436static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len) 437{ 438 if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY) 439 memcpy(crypto->key, 440 &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY], 441 sizeof(crypto->key)); 442 443 if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY) 444 memcpy(crypto->tx_mic, 445 &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 446 sizeof(crypto->tx_mic)); 447 448 if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY) 449 memcpy(crypto->rx_mic, 450 &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 451 sizeof(crypto->rx_mic)); 452} 453 454int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 455 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 456 struct ieee80211_key_conf *key) 457{ 458 struct rt2x00_dev *rt2x00dev = hw->priv; 459 int (*set_key) (struct rt2x00_dev *rt2x00dev, 460 struct rt2x00lib_crypto *crypto, 461 struct ieee80211_key_conf *key); 462 struct rt2x00lib_crypto crypto; 463 static const u8 bcast_addr[ETH_ALEN] = 464 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; 465 struct rt2x00_sta *sta_priv = NULL; 466 467 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 468 return 0; 469 470 if (!rt2x00_has_cap_hw_crypto(rt2x00dev)) 471 return -EOPNOTSUPP; 472 473 /* 474 * To support IBSS RSN, don't program group keys in IBSS, the 475 * hardware will then not attempt to decrypt the frames. 476 */ 477 if (vif->type == NL80211_IFTYPE_ADHOC && 478 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) 479 return -EOPNOTSUPP; 480 481 if (key->keylen > 32) 482 return -ENOSPC; 483 484 memset(&crypto, 0, sizeof(crypto)); 485 486 crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif); 487 crypto.cipher = rt2x00crypto_key_to_cipher(key); 488 if (crypto.cipher == CIPHER_NONE) 489 return -EOPNOTSUPP; 490 if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev)) 491 return -EOPNOTSUPP; 492 493 crypto.cmd = cmd; 494 495 if (sta) { 496 crypto.address = sta->addr; 497 sta_priv = sta_to_rt2x00_sta(sta); 498 crypto.wcid = sta_priv->wcid; 499 } else 500 crypto.address = bcast_addr; 501 502 if (crypto.cipher == CIPHER_TKIP) 503 memcpy_tkip(&crypto, &key->key[0], key->keylen); 504 else 505 memcpy(crypto.key, &key->key[0], key->keylen); 506 /* 507 * Each BSS has a maximum of 4 shared keys. 508 * Shared key index values: 509 * 0) BSS0 key0 510 * 1) BSS0 key1 511 * ... 512 * 4) BSS1 key0 513 * ... 514 * 8) BSS2 key0 515 * ... 516 * Both pairwise as shared key indeces are determined by 517 * driver. This is required because the hardware requires 518 * keys to be assigned in correct order (When key 1 is 519 * provided but key 0 is not, then the key is not found 520 * by the hardware during RX). 521 */ 522 if (cmd == SET_KEY) 523 key->hw_key_idx = 0; 524 525 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) 526 set_key = rt2x00dev->ops->lib->config_pairwise_key; 527 else 528 set_key = rt2x00dev->ops->lib->config_shared_key; 529 530 if (!set_key) 531 return -EOPNOTSUPP; 532 533 return set_key(rt2x00dev, &crypto, key); 534} 535EXPORT_SYMBOL_GPL(rt2x00mac_set_key); 536#endif /* CONFIG_RT2X00_LIB_CRYPTO */ 537 538int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 539 struct ieee80211_sta *sta) 540{ 541 struct rt2x00_dev *rt2x00dev = hw->priv; 542 struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta); 543 544 /* 545 * If there's no space left in the device table store 546 * -1 as wcid but tell mac80211 everything went ok. 547 */ 548 if (rt2x00dev->ops->lib->sta_add(rt2x00dev, vif, sta)) 549 sta_priv->wcid = -1; 550 551 return 0; 552} 553EXPORT_SYMBOL_GPL(rt2x00mac_sta_add); 554 555int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 556 struct ieee80211_sta *sta) 557{ 558 struct rt2x00_dev *rt2x00dev = hw->priv; 559 struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta); 560 561 /* 562 * If we never sent the STA to the device no need to clean it up. 563 */ 564 if (sta_priv->wcid < 0) 565 return 0; 566 567 return rt2x00dev->ops->lib->sta_remove(rt2x00dev, sta_priv->wcid); 568} 569EXPORT_SYMBOL_GPL(rt2x00mac_sta_remove); 570 571void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw, 572 struct ieee80211_vif *vif, 573 const u8 *mac_addr) 574{ 575 struct rt2x00_dev *rt2x00dev = hw->priv; 576 set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); 577 rt2x00link_stop_tuner(rt2x00dev); 578} 579EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start); 580 581void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw, 582 struct ieee80211_vif *vif) 583{ 584 struct rt2x00_dev *rt2x00dev = hw->priv; 585 clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); 586 rt2x00link_start_tuner(rt2x00dev); 587} 588EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete); 589 590int rt2x00mac_get_stats(struct ieee80211_hw *hw, 591 struct ieee80211_low_level_stats *stats) 592{ 593 struct rt2x00_dev *rt2x00dev = hw->priv; 594 595 /* 596 * The dot11ACKFailureCount, dot11RTSFailureCount and 597 * dot11RTSSuccessCount are updated in interrupt time. 598 * dot11FCSErrorCount is updated in the link tuner. 599 */ 600 memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats)); 601 602 return 0; 603} 604EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); 605 606void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, 607 struct ieee80211_vif *vif, 608 struct ieee80211_bss_conf *bss_conf, 609 u32 changes) 610{ 611 struct rt2x00_dev *rt2x00dev = hw->priv; 612 struct rt2x00_intf *intf = vif_to_intf(vif); 613 614 /* 615 * mac80211 might be calling this function while we are trying 616 * to remove the device or perhaps suspending it. 617 */ 618 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 619 return; 620 621 /* 622 * Update the BSSID. 623 */ 624 if (changes & BSS_CHANGED_BSSID) 625 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL, 626 bss_conf->bssid); 627 628 /* 629 * Start/stop beaconing. 630 */ 631 if (changes & BSS_CHANGED_BEACON_ENABLED) { 632 mutex_lock(&intf->beacon_skb_mutex); 633 if (!bss_conf->enable_beacon && intf->enable_beacon) { 634 rt2x00dev->intf_beaconing--; 635 intf->enable_beacon = false; 636 637 if (rt2x00dev->intf_beaconing == 0) { 638 /* 639 * Last beaconing interface disabled 640 * -> stop beacon queue. 641 */ 642 rt2x00queue_stop_queue(rt2x00dev->bcn); 643 } 644 /* 645 * Clear beacon in the H/W for this vif. This is needed 646 * to disable beaconing on this particular interface 647 * and keep it running on other interfaces. 648 */ 649 rt2x00queue_clear_beacon(rt2x00dev, vif); 650 } else if (bss_conf->enable_beacon && !intf->enable_beacon) { 651 rt2x00dev->intf_beaconing++; 652 intf->enable_beacon = true; 653 /* 654 * Upload beacon to the H/W. This is only required on 655 * USB devices. PCI devices fetch beacons periodically. 656 */ 657 if (rt2x00_is_usb(rt2x00dev)) 658 rt2x00queue_update_beacon(rt2x00dev, vif); 659 660 if (rt2x00dev->intf_beaconing == 1) { 661 /* 662 * First beaconing interface enabled 663 * -> start beacon queue. 664 */ 665 rt2x00queue_start_queue(rt2x00dev->bcn); 666 } 667 } 668 mutex_unlock(&intf->beacon_skb_mutex); 669 } 670 671 /* 672 * When the association status has changed we must reset the link 673 * tuner counter. This is because some drivers determine if they 674 * should perform link tuning based on the number of seconds 675 * while associated or not associated. 676 */ 677 if (changes & BSS_CHANGED_ASSOC) { 678 rt2x00dev->link.count = 0; 679 680 if (bss_conf->assoc) 681 rt2x00dev->intf_associated++; 682 else 683 rt2x00dev->intf_associated--; 684 685 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); 686 687 clear_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); 688 } 689 690 /* 691 * Check for access point which do not support 802.11e . We have to 692 * generate data frames sequence number in S/W for such AP, because 693 * of H/W bug. 694 */ 695 if (changes & BSS_CHANGED_QOS && !bss_conf->qos) 696 set_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); 697 698 /* 699 * When the erp information has changed, we should perform 700 * additional configuration steps. For all other changes we are done. 701 */ 702 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | 703 BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | 704 BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) 705 rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes); 706} 707EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); 708 709int rt2x00mac_conf_tx(struct ieee80211_hw *hw, 710 struct ieee80211_vif *vif, u16 queue_idx, 711 const struct ieee80211_tx_queue_params *params) 712{ 713 struct rt2x00_dev *rt2x00dev = hw->priv; 714 struct data_queue *queue; 715 716 queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx); 717 if (unlikely(!queue)) 718 return -EINVAL; 719 720 /* 721 * The passed variables are stored as real value ((2^n)-1). 722 * Ralink registers require to know the bit number 'n'. 723 */ 724 if (params->cw_min > 0) 725 queue->cw_min = fls(params->cw_min); 726 else 727 queue->cw_min = 5; /* cw_min: 2^5 = 32. */ 728 729 if (params->cw_max > 0) 730 queue->cw_max = fls(params->cw_max); 731 else 732 queue->cw_max = 10; /* cw_min: 2^10 = 1024. */ 733 734 queue->aifs = params->aifs; 735 queue->txop = params->txop; 736 737 rt2x00_dbg(rt2x00dev, 738 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n", 739 queue_idx, queue->cw_min, queue->cw_max, queue->aifs, 740 queue->txop); 741 742 return 0; 743} 744EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); 745 746void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw) 747{ 748 struct rt2x00_dev *rt2x00dev = hw->priv; 749 bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev); 750 751 wiphy_rfkill_set_hw_state(hw->wiphy, !active); 752} 753EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll); 754 755void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 756 u32 queues, bool drop) 757{ 758 struct rt2x00_dev *rt2x00dev = hw->priv; 759 struct data_queue *queue; 760 761 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 762 return; 763 764 tx_queue_for_each(rt2x00dev, queue) 765 rt2x00queue_flush_queue(queue, drop); 766} 767EXPORT_SYMBOL_GPL(rt2x00mac_flush); 768 769int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) 770{ 771 struct rt2x00_dev *rt2x00dev = hw->priv; 772 struct link_ant *ant = &rt2x00dev->link.ant; 773 struct antenna_setup *def = &rt2x00dev->default_ant; 774 struct antenna_setup setup; 775 776 // The antenna value is not supposed to be 0, 777 // or exceed the maximum number of antenna's. 778 if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3)) 779 return -EINVAL; 780 781 // When the client tried to configure the antenna to or from 782 // diversity mode, we must reset the default antenna as well 783 // as that controls the diversity switch. 784 if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3) 785 ant->flags &= ~ANTENNA_TX_DIVERSITY; 786 if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3) 787 ant->flags &= ~ANTENNA_RX_DIVERSITY; 788 789 // If diversity is being enabled, check if we need hardware 790 // or software diversity. In the latter case, reset the value, 791 // and make sure we update the antenna flags to have the 792 // link tuner pick up the diversity tuning. 793 if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) { 794 tx_ant = ANTENNA_SW_DIVERSITY; 795 ant->flags |= ANTENNA_TX_DIVERSITY; 796 } 797 798 if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) { 799 rx_ant = ANTENNA_SW_DIVERSITY; 800 ant->flags |= ANTENNA_RX_DIVERSITY; 801 } 802 803 setup.tx = tx_ant; 804 setup.rx = rx_ant; 805 setup.rx_chain_num = 0; 806 setup.tx_chain_num = 0; 807 808 rt2x00lib_config_antenna(rt2x00dev, setup); 809 810 return 0; 811} 812EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna); 813 814int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) 815{ 816 struct rt2x00_dev *rt2x00dev = hw->priv; 817 struct link_ant *ant = &rt2x00dev->link.ant; 818 struct antenna_setup *active = &rt2x00dev->link.ant.active; 819 820 // When software diversity is active, we must report this to the 821 // client and not the current active antenna state. 822 if (ant->flags & ANTENNA_TX_DIVERSITY) 823 *tx_ant = ANTENNA_HW_DIVERSITY; 824 else 825 *tx_ant = active->tx; 826 827 if (ant->flags & ANTENNA_RX_DIVERSITY) 828 *rx_ant = ANTENNA_HW_DIVERSITY; 829 else 830 *rx_ant = active->rx; 831 832 return 0; 833} 834EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna); 835 836void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, 837 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) 838{ 839 struct rt2x00_dev *rt2x00dev = hw->priv; 840 struct data_queue *queue; 841 842 tx_queue_for_each(rt2x00dev, queue) { 843 *tx += queue->length; 844 *tx_max += queue->limit; 845 } 846 847 *rx = rt2x00dev->rx->length; 848 *rx_max = rt2x00dev->rx->limit; 849} 850EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam); 851 852bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw) 853{ 854 struct rt2x00_dev *rt2x00dev = hw->priv; 855 struct data_queue *queue; 856 857 tx_queue_for_each(rt2x00dev, queue) { 858 if (!rt2x00queue_empty(queue)) 859 return true; 860 } 861 862 return false; 863} 864EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending); 865