1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> 4 <http://rt2x00.serialmonkey.com> 5 6 */ 7 8/* 9 Module: rt2x00mac 10 Abstract: rt2x00 generic mac80211 routines. 11 */ 12 13#include <linux/kernel.h> 14#include <linux/module.h> 15 16#include "rt2x00.h" 17#include "rt2x00lib.h" 18 19static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev, 20 struct data_queue *queue, 21 struct sk_buff *frag_skb) 22{ 23 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(frag_skb); 24 struct ieee80211_tx_info *rts_info; 25 struct sk_buff *skb; 26 unsigned int data_length; 27 int retval = 0; 28 29 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 30 data_length = sizeof(struct ieee80211_cts); 31 else 32 data_length = sizeof(struct ieee80211_rts); 33 34 skb = dev_alloc_skb(data_length + rt2x00dev->hw->extra_tx_headroom); 35 if (unlikely(!skb)) { 36 rt2x00_warn(rt2x00dev, "Failed to create RTS/CTS frame\n"); 37 return -ENOMEM; 38 } 39 40 skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom); 41 skb_put(skb, data_length); 42 43 /* 44 * Copy TX information over from original frame to 45 * RTS/CTS frame. Note that we set the no encryption flag 46 * since we don't want this frame to be encrypted. 47 * RTS frames should be acked, while CTS-to-self frames 48 * should not. The ready for TX flag is cleared to prevent 49 * it being automatically send when the descriptor is 50 * written to the hardware. 51 */ 52 memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb)); 53 rts_info = IEEE80211_SKB_CB(skb); 54 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS; 55 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_CTS_PROTECT; 56 57 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 58 rts_info->flags |= IEEE80211_TX_CTL_NO_ACK; 59 else 60 rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK; 61 62 /* Disable hardware encryption */ 63 rts_info->control.hw_key = NULL; 64 65 /* 66 * RTS/CTS frame should use the length of the frame plus any 67 * encryption overhead that will be added by the hardware. 68 */ 69 data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb); 70 71 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 72 ieee80211_ctstoself_get(rt2x00dev->hw, tx_info->control.vif, 73 frag_skb->data, data_length, tx_info, 74 (struct ieee80211_cts *)(skb->data)); 75 else 76 ieee80211_rts_get(rt2x00dev->hw, tx_info->control.vif, 77 frag_skb->data, data_length, tx_info, 78 (struct ieee80211_rts *)(skb->data)); 79 80 retval = rt2x00queue_write_tx_frame(queue, skb, NULL, true); 81 if (retval) { 82 dev_kfree_skb_any(skb); 83 rt2x00_warn(rt2x00dev, "Failed to send RTS/CTS frame\n"); 84 } 85 86 return retval; 87} 88 89void rt2x00mac_tx(struct ieee80211_hw *hw, 90 struct ieee80211_tx_control *control, 91 struct sk_buff *skb) 92{ 93 struct rt2x00_dev *rt2x00dev = hw->priv; 94 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); 95 enum data_queue_qid qid = skb_get_queue_mapping(skb); 96 struct data_queue *queue = NULL; 97 98 /* 99 * Mac80211 might be calling this function while we are trying 100 * to remove the device or perhaps suspending it. 101 * Note that we can only stop the TX queues inside the TX path 102 * due to possible race conditions in mac80211. 103 */ 104 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 105 goto exit_free_skb; 106 107 /* 108 * Use the ATIM queue if appropriate and present. 109 */ 110 if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 111 rt2x00_has_cap_flag(rt2x00dev, REQUIRE_ATIM_QUEUE)) 112 qid = QID_ATIM; 113 114 queue = rt2x00queue_get_tx_queue(rt2x00dev, qid); 115 if (unlikely(!queue)) { 116 rt2x00_err(rt2x00dev, 117 "Attempt to send packet over invalid queue %d\n" 118 "Please file bug report to %s\n", qid, DRV_PROJECT); 119 goto exit_free_skb; 120 } 121 122 /* 123 * If CTS/RTS is required. create and queue that frame first. 124 * Make sure we have at least enough entries available to send 125 * this CTS/RTS frame as well as the data frame. 126 * Note that when the driver has set the set_rts_threshold() 127 * callback function it doesn't need software generation of 128 * either RTS or CTS-to-self frame and handles everything 129 * inside the hardware. 130 */ 131 if (!rt2x00dev->ops->hw->set_rts_threshold && 132 (tx_info->control.rates[0].flags & (IEEE80211_TX_RC_USE_RTS_CTS | 133 IEEE80211_TX_RC_USE_CTS_PROTECT))) { 134 if (rt2x00queue_available(queue) <= 1) { 135 /* 136 * Recheck for full queue under lock to avoid race 137 * conditions with rt2x00lib_txdone(). 138 */ 139 spin_lock(&queue->tx_lock); 140 if (rt2x00queue_threshold(queue)) 141 rt2x00queue_pause_queue(queue); 142 spin_unlock(&queue->tx_lock); 143 144 goto exit_free_skb; 145 } 146 147 if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb)) 148 goto exit_free_skb; 149 } 150 151 if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false))) 152 goto exit_free_skb; 153 154 return; 155 156 exit_free_skb: 157 ieee80211_free_txskb(hw, skb); 158} 159EXPORT_SYMBOL_GPL(rt2x00mac_tx); 160 161int rt2x00mac_start(struct ieee80211_hw *hw) 162{ 163 struct rt2x00_dev *rt2x00dev = hw->priv; 164 165 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 166 return 0; 167 168 if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) { 169 /* 170 * This is special case for ieee80211_restart_hw(), otherwise 171 * mac80211 never call start() two times in row without stop(); 172 */ 173 set_bit(DEVICE_STATE_RESET, &rt2x00dev->flags); 174 rt2x00dev->ops->lib->pre_reset_hw(rt2x00dev); 175 rt2x00lib_stop(rt2x00dev); 176 } 177 return rt2x00lib_start(rt2x00dev); 178} 179EXPORT_SYMBOL_GPL(rt2x00mac_start); 180 181void rt2x00mac_stop(struct ieee80211_hw *hw) 182{ 183 struct rt2x00_dev *rt2x00dev = hw->priv; 184 185 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 186 return; 187 188 rt2x00lib_stop(rt2x00dev); 189} 190EXPORT_SYMBOL_GPL(rt2x00mac_stop); 191 192void 193rt2x00mac_reconfig_complete(struct ieee80211_hw *hw, 194 enum ieee80211_reconfig_type reconfig_type) 195{ 196 struct rt2x00_dev *rt2x00dev = hw->priv; 197 198 if (reconfig_type == IEEE80211_RECONFIG_TYPE_RESTART) 199 clear_bit(DEVICE_STATE_RESET, &rt2x00dev->flags); 200} 201EXPORT_SYMBOL_GPL(rt2x00mac_reconfig_complete); 202 203int rt2x00mac_add_interface(struct ieee80211_hw *hw, 204 struct ieee80211_vif *vif) 205{ 206 struct rt2x00_dev *rt2x00dev = hw->priv; 207 struct rt2x00_intf *intf = vif_to_intf(vif); 208 struct data_queue *queue = rt2x00dev->bcn; 209 struct queue_entry *entry = NULL; 210 unsigned int i; 211 212 /* 213 * Don't allow interfaces to be added 214 * the device has disappeared. 215 */ 216 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || 217 !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) 218 return -ENODEV; 219 220 /* 221 * Loop through all beacon queues to find a free 222 * entry. Since there are as much beacon entries 223 * as the maximum interfaces, this search shouldn't 224 * fail. 225 */ 226 for (i = 0; i < queue->limit; i++) { 227 entry = &queue->entries[i]; 228 if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags)) 229 break; 230 } 231 232 if (unlikely(i == queue->limit)) 233 return -ENOBUFS; 234 235 /* 236 * We are now absolutely sure the interface can be created, 237 * increase interface count and start initialization. 238 */ 239 240 if (vif->type == NL80211_IFTYPE_AP) 241 rt2x00dev->intf_ap_count++; 242 else 243 rt2x00dev->intf_sta_count++; 244 245 mutex_init(&intf->beacon_skb_mutex); 246 intf->beacon = entry; 247 248 /* 249 * The MAC address must be configured after the device 250 * has been initialized. Otherwise the device can reset 251 * the MAC registers. 252 * The BSSID address must only be configured in AP mode, 253 * however we should not send an empty BSSID address for 254 * STA interfaces at this time, since this can cause 255 * invalid behavior in the device. 256 */ 257 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, 258 vif->addr, NULL); 259 260 /* 261 * Some filters depend on the current working mode. We can force 262 * an update during the next configure_filter() run by mac80211 by 263 * resetting the current packet_filter state. 264 */ 265 rt2x00dev->packet_filter = 0; 266 267 return 0; 268} 269EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); 270 271void rt2x00mac_remove_interface(struct ieee80211_hw *hw, 272 struct ieee80211_vif *vif) 273{ 274 struct rt2x00_dev *rt2x00dev = hw->priv; 275 struct rt2x00_intf *intf = vif_to_intf(vif); 276 277 /* 278 * Don't allow interfaces to be remove while 279 * either the device has disappeared or when 280 * no interface is present. 281 */ 282 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || 283 (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) || 284 (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count)) 285 return; 286 287 if (vif->type == NL80211_IFTYPE_AP) 288 rt2x00dev->intf_ap_count--; 289 else 290 rt2x00dev->intf_sta_count--; 291 292 /* 293 * Release beacon entry so it is available for 294 * new interfaces again. 295 */ 296 clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags); 297 298 /* 299 * Make sure the bssid and mac address registers 300 * are cleared to prevent false ACKing of frames. 301 */ 302 rt2x00lib_config_intf(rt2x00dev, intf, 303 NL80211_IFTYPE_UNSPECIFIED, NULL, NULL); 304} 305EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); 306 307int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed) 308{ 309 struct rt2x00_dev *rt2x00dev = hw->priv; 310 struct ieee80211_conf *conf = &hw->conf; 311 312 /* 313 * mac80211 might be calling this function while we are trying 314 * to remove the device or perhaps suspending it. 315 */ 316 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 317 return 0; 318 319 /* 320 * Some configuration parameters (e.g. channel and antenna values) can 321 * only be set when the radio is enabled, but do require the RX to 322 * be off. During this period we should keep link tuning enabled, 323 * if for any reason the link tuner must be reset, this will be 324 * handled by rt2x00lib_config(). 325 */ 326 rt2x00queue_stop_queue(rt2x00dev->rx); 327 328 /* Do not race with link tuner. */ 329 mutex_lock(&rt2x00dev->conf_mutex); 330 331 /* 332 * When we've just turned on the radio, we want to reprogram 333 * everything to ensure a consistent state 334 */ 335 rt2x00lib_config(rt2x00dev, conf, changed); 336 337 /* 338 * After the radio has been enabled we need to configure 339 * the antenna to the default settings. rt2x00lib_config_antenna() 340 * should determine if any action should be taken based on 341 * checking if diversity has been enabled or no antenna changes 342 * have been made since the last configuration change. 343 */ 344 rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant); 345 346 mutex_unlock(&rt2x00dev->conf_mutex); 347 348 /* Turn RX back on */ 349 rt2x00queue_start_queue(rt2x00dev->rx); 350 351 return 0; 352} 353EXPORT_SYMBOL_GPL(rt2x00mac_config); 354 355void rt2x00mac_configure_filter(struct ieee80211_hw *hw, 356 unsigned int changed_flags, 357 unsigned int *total_flags, 358 u64 multicast) 359{ 360 struct rt2x00_dev *rt2x00dev = hw->priv; 361 362 /* 363 * Mask off any flags we are going to ignore 364 * from the total_flags field. 365 */ 366 *total_flags &= 367 FIF_ALLMULTI | 368 FIF_FCSFAIL | 369 FIF_PLCPFAIL | 370 FIF_CONTROL | 371 FIF_PSPOLL | 372 FIF_OTHER_BSS; 373 374 /* 375 * Apply some rules to the filters: 376 * - Some filters imply different filters to be set. 377 * - Some things we can't filter out at all. 378 * - Multicast filter seems to kill broadcast traffic so never use it. 379 */ 380 *total_flags |= FIF_ALLMULTI; 381 382 /* 383 * If the device has a single filter for all control frames, 384 * FIF_CONTROL and FIF_PSPOLL flags imply each other. 385 * And if the device has more than one filter for control frames 386 * of different types, but has no a separate filter for PS Poll frames, 387 * FIF_CONTROL flag implies FIF_PSPOLL. 388 */ 389 if (!rt2x00_has_cap_control_filters(rt2x00dev)) { 390 if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL) 391 *total_flags |= FIF_CONTROL | FIF_PSPOLL; 392 } 393 if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) { 394 if (*total_flags & FIF_CONTROL) 395 *total_flags |= FIF_PSPOLL; 396 } 397 398 rt2x00dev->packet_filter = *total_flags; 399 400 rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags); 401} 402EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter); 403 404static void rt2x00mac_set_tim_iter(void *data, u8 *mac, 405 struct ieee80211_vif *vif) 406{ 407 struct rt2x00_intf *intf = vif_to_intf(vif); 408 409 if (vif->type != NL80211_IFTYPE_AP && 410 vif->type != NL80211_IFTYPE_ADHOC && 411 vif->type != NL80211_IFTYPE_MESH_POINT) 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 /* The hardware can't do MFP */ 471 if (!rt2x00_has_cap_hw_crypto(rt2x00dev) || (sta && sta->mfp)) 472 return -EOPNOTSUPP; 473 474 /* 475 * To support IBSS RSN, don't program group keys in IBSS, the 476 * hardware will then not attempt to decrypt the frames. 477 */ 478 if (vif->type == NL80211_IFTYPE_ADHOC && 479 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) 480 return -EOPNOTSUPP; 481 482 if (key->keylen > 32) 483 return -ENOSPC; 484 485 memset(&crypto, 0, sizeof(crypto)); 486 487 crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif); 488 crypto.cipher = rt2x00crypto_key_to_cipher(key); 489 if (crypto.cipher == CIPHER_NONE) 490 return -EOPNOTSUPP; 491 if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev)) 492 return -EOPNOTSUPP; 493 494 crypto.cmd = cmd; 495 496 if (sta) { 497 crypto.address = sta->addr; 498 sta_priv = sta_to_rt2x00_sta(sta); 499 crypto.wcid = sta_priv->wcid; 500 } else 501 crypto.address = bcast_addr; 502 503 if (crypto.cipher == CIPHER_TKIP) 504 memcpy_tkip(&crypto, &key->key[0], key->keylen); 505 else 506 memcpy(crypto.key, &key->key[0], key->keylen); 507 /* 508 * Each BSS has a maximum of 4 shared keys. 509 * Shared key index values: 510 * 0) BSS0 key0 511 * 1) BSS0 key1 512 * ... 513 * 4) BSS1 key0 514 * ... 515 * 8) BSS2 key0 516 * ... 517 * Both pairwise as shared key indeces are determined by 518 * driver. This is required because the hardware requires 519 * keys to be assigned in correct order (When key 1 is 520 * provided but key 0 is not, then the key is not found 521 * by the hardware during RX). 522 */ 523 if (cmd == SET_KEY) 524 key->hw_key_idx = 0; 525 526 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) 527 set_key = rt2x00dev->ops->lib->config_pairwise_key; 528 else 529 set_key = rt2x00dev->ops->lib->config_shared_key; 530 531 if (!set_key) 532 return -EOPNOTSUPP; 533 534 return set_key(rt2x00dev, &crypto, key); 535} 536EXPORT_SYMBOL_GPL(rt2x00mac_set_key); 537#endif /* CONFIG_RT2X00_LIB_CRYPTO */ 538 539void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw, 540 struct ieee80211_vif *vif, 541 const u8 *mac_addr) 542{ 543 struct rt2x00_dev *rt2x00dev = hw->priv; 544 set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); 545 rt2x00link_stop_tuner(rt2x00dev); 546} 547EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start); 548 549void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw, 550 struct ieee80211_vif *vif) 551{ 552 struct rt2x00_dev *rt2x00dev = hw->priv; 553 clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); 554 rt2x00link_start_tuner(rt2x00dev); 555} 556EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete); 557 558int rt2x00mac_get_stats(struct ieee80211_hw *hw, 559 struct ieee80211_low_level_stats *stats) 560{ 561 struct rt2x00_dev *rt2x00dev = hw->priv; 562 563 /* 564 * The dot11ACKFailureCount, dot11RTSFailureCount and 565 * dot11RTSSuccessCount are updated in interrupt time. 566 * dot11FCSErrorCount is updated in the link tuner. 567 */ 568 memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats)); 569 570 return 0; 571} 572EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); 573 574void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, 575 struct ieee80211_vif *vif, 576 struct ieee80211_bss_conf *bss_conf, 577 u64 changes) 578{ 579 struct rt2x00_dev *rt2x00dev = hw->priv; 580 struct rt2x00_intf *intf = vif_to_intf(vif); 581 582 /* 583 * mac80211 might be calling this function while we are trying 584 * to remove the device or perhaps suspending it. 585 */ 586 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 587 return; 588 589 /* 590 * Update the BSSID. 591 */ 592 if (changes & BSS_CHANGED_BSSID) 593 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL, 594 bss_conf->bssid); 595 596 /* 597 * Start/stop beaconing. 598 */ 599 if (changes & BSS_CHANGED_BEACON_ENABLED) { 600 mutex_lock(&intf->beacon_skb_mutex); 601 602 /* 603 * Clear the 'enable_beacon' flag and clear beacon because 604 * the beacon queue has been stopped after hardware reset. 605 */ 606 if (test_bit(DEVICE_STATE_RESET, &rt2x00dev->flags) && 607 intf->enable_beacon) { 608 intf->enable_beacon = false; 609 rt2x00queue_clear_beacon(rt2x00dev, vif); 610 } 611 612 if (!bss_conf->enable_beacon && intf->enable_beacon) { 613 rt2x00dev->intf_beaconing--; 614 intf->enable_beacon = false; 615 616 if (rt2x00dev->intf_beaconing == 0) { 617 /* 618 * Last beaconing interface disabled 619 * -> stop beacon queue. 620 */ 621 rt2x00queue_stop_queue(rt2x00dev->bcn); 622 } 623 /* 624 * Clear beacon in the H/W for this vif. This is needed 625 * to disable beaconing on this particular interface 626 * and keep it running on other interfaces. 627 */ 628 rt2x00queue_clear_beacon(rt2x00dev, vif); 629 } else if (bss_conf->enable_beacon && !intf->enable_beacon) { 630 rt2x00dev->intf_beaconing++; 631 intf->enable_beacon = true; 632 /* 633 * Upload beacon to the H/W. This is only required on 634 * USB devices. PCI devices fetch beacons periodically. 635 */ 636 if (rt2x00_is_usb(rt2x00dev)) 637 rt2x00queue_update_beacon(rt2x00dev, vif); 638 639 if (rt2x00dev->intf_beaconing == 1) { 640 /* 641 * First beaconing interface enabled 642 * -> start beacon queue. 643 */ 644 rt2x00queue_start_queue(rt2x00dev->bcn); 645 } 646 } 647 mutex_unlock(&intf->beacon_skb_mutex); 648 } 649 650 /* 651 * When the association status has changed we must reset the link 652 * tuner counter. This is because some drivers determine if they 653 * should perform link tuning based on the number of seconds 654 * while associated or not associated. 655 */ 656 if (changes & BSS_CHANGED_ASSOC) { 657 rt2x00dev->link.count = 0; 658 659 if (vif->cfg.assoc) 660 rt2x00dev->intf_associated++; 661 else 662 rt2x00dev->intf_associated--; 663 664 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); 665 } 666 667 /* 668 * When the erp information has changed, we should perform 669 * additional configuration steps. For all other changes we are done. 670 */ 671 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | 672 BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | 673 BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) 674 rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes); 675} 676EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); 677 678int rt2x00mac_conf_tx(struct ieee80211_hw *hw, 679 struct ieee80211_vif *vif, 680 unsigned int link_id, u16 queue_idx, 681 const struct ieee80211_tx_queue_params *params) 682{ 683 struct rt2x00_dev *rt2x00dev = hw->priv; 684 struct data_queue *queue; 685 686 queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx); 687 if (unlikely(!queue)) 688 return -EINVAL; 689 690 /* 691 * The passed variables are stored as real value ((2^n)-1). 692 * Ralink registers require to know the bit number 'n'. 693 */ 694 if (params->cw_min > 0) 695 queue->cw_min = fls(params->cw_min); 696 else 697 queue->cw_min = 5; /* cw_min: 2^5 = 32. */ 698 699 if (params->cw_max > 0) 700 queue->cw_max = fls(params->cw_max); 701 else 702 queue->cw_max = 10; /* cw_min: 2^10 = 1024. */ 703 704 queue->aifs = params->aifs; 705 queue->txop = params->txop; 706 707 rt2x00_dbg(rt2x00dev, 708 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n", 709 queue_idx, queue->cw_min, queue->cw_max, queue->aifs, 710 queue->txop); 711 712 return 0; 713} 714EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); 715 716void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw) 717{ 718 struct rt2x00_dev *rt2x00dev = hw->priv; 719 bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev); 720 721 wiphy_rfkill_set_hw_state(hw->wiphy, !active); 722} 723EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll); 724 725void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 726 u32 queues, bool drop) 727{ 728 struct rt2x00_dev *rt2x00dev = hw->priv; 729 struct data_queue *queue; 730 731 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 732 return; 733 734 set_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags); 735 736 tx_queue_for_each(rt2x00dev, queue) 737 rt2x00queue_flush_queue(queue, drop); 738 739 clear_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags); 740} 741EXPORT_SYMBOL_GPL(rt2x00mac_flush); 742 743int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) 744{ 745 struct rt2x00_dev *rt2x00dev = hw->priv; 746 struct link_ant *ant = &rt2x00dev->link.ant; 747 struct antenna_setup *def = &rt2x00dev->default_ant; 748 struct antenna_setup setup; 749 750 // The antenna value is not supposed to be 0, 751 // or exceed the maximum number of antenna's. 752 if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3)) 753 return -EINVAL; 754 755 // When the client tried to configure the antenna to or from 756 // diversity mode, we must reset the default antenna as well 757 // as that controls the diversity switch. 758 if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3) 759 ant->flags &= ~ANTENNA_TX_DIVERSITY; 760 if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3) 761 ant->flags &= ~ANTENNA_RX_DIVERSITY; 762 763 // If diversity is being enabled, check if we need hardware 764 // or software diversity. In the latter case, reset the value, 765 // and make sure we update the antenna flags to have the 766 // link tuner pick up the diversity tuning. 767 if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) { 768 tx_ant = ANTENNA_SW_DIVERSITY; 769 ant->flags |= ANTENNA_TX_DIVERSITY; 770 } 771 772 if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) { 773 rx_ant = ANTENNA_SW_DIVERSITY; 774 ant->flags |= ANTENNA_RX_DIVERSITY; 775 } 776 777 setup.tx = tx_ant; 778 setup.rx = rx_ant; 779 setup.rx_chain_num = 0; 780 setup.tx_chain_num = 0; 781 782 rt2x00lib_config_antenna(rt2x00dev, setup); 783 784 return 0; 785} 786EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna); 787 788int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) 789{ 790 struct rt2x00_dev *rt2x00dev = hw->priv; 791 struct link_ant *ant = &rt2x00dev->link.ant; 792 struct antenna_setup *active = &rt2x00dev->link.ant.active; 793 794 // When software diversity is active, we must report this to the 795 // client and not the current active antenna state. 796 if (ant->flags & ANTENNA_TX_DIVERSITY) 797 *tx_ant = ANTENNA_HW_DIVERSITY; 798 else 799 *tx_ant = active->tx; 800 801 if (ant->flags & ANTENNA_RX_DIVERSITY) 802 *rx_ant = ANTENNA_HW_DIVERSITY; 803 else 804 *rx_ant = active->rx; 805 806 return 0; 807} 808EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna); 809 810void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, 811 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) 812{ 813 struct rt2x00_dev *rt2x00dev = hw->priv; 814 struct data_queue *queue; 815 816 tx_queue_for_each(rt2x00dev, queue) { 817 *tx += queue->length; 818 *tx_max += queue->limit; 819 } 820 821 *rx = rt2x00dev->rx->length; 822 *rx_max = rt2x00dev->rx->limit; 823} 824EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam); 825 826bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw) 827{ 828 struct rt2x00_dev *rt2x00dev = hw->priv; 829 struct data_queue *queue; 830 831 tx_queue_for_each(rt2x00dev, queue) { 832 if (!rt2x00queue_empty(queue)) 833 return true; 834 } 835 836 return false; 837} 838EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending); 839