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 19 static 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 89 void 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 } 159 EXPORT_SYMBOL_GPL(rt2x00mac_tx); 160 161 int 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 } 179 EXPORT_SYMBOL_GPL(rt2x00mac_start); 180 181 void 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 } 190 EXPORT_SYMBOL_GPL(rt2x00mac_stop); 191 192 void 193 rt2x00mac_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 } 201 EXPORT_SYMBOL_GPL(rt2x00mac_reconfig_complete); 202 203 int 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 } 269 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); 270 271 void 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 } 305 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); 306 307 int 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 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 } 353 EXPORT_SYMBOL_GPL(rt2x00mac_config); 354 355 void 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 } 402 EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter); 403 404 static 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 vif->type != NL80211_IFTYPE_WDS) 413 return; 414 415 set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags); 416 } 417 418 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 419 bool set) 420 { 421 struct rt2x00_dev *rt2x00dev = hw->priv; 422 423 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) 424 return 0; 425 426 ieee80211_iterate_active_interfaces_atomic( 427 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 428 rt2x00mac_set_tim_iter, rt2x00dev); 429 430 /* queue work to upodate the beacon template */ 431 ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work); 432 return 0; 433 } 434 EXPORT_SYMBOL_GPL(rt2x00mac_set_tim); 435 436 #ifdef CONFIG_RT2X00_LIB_CRYPTO 437 static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len) 438 { 439 if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY) 440 memcpy(crypto->key, 441 &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY], 442 sizeof(crypto->key)); 443 444 if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY) 445 memcpy(crypto->tx_mic, 446 &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 447 sizeof(crypto->tx_mic)); 448 449 if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY) 450 memcpy(crypto->rx_mic, 451 &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 452 sizeof(crypto->rx_mic)); 453 } 454 455 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 456 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 457 struct ieee80211_key_conf *key) 458 { 459 struct rt2x00_dev *rt2x00dev = hw->priv; 460 int (*set_key) (struct rt2x00_dev *rt2x00dev, 461 struct rt2x00lib_crypto *crypto, 462 struct ieee80211_key_conf *key); 463 struct rt2x00lib_crypto crypto; 464 static const u8 bcast_addr[ETH_ALEN] = 465 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; 466 struct rt2x00_sta *sta_priv = NULL; 467 468 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 469 return 0; 470 471 if (!rt2x00_has_cap_hw_crypto(rt2x00dev)) 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 } 536 EXPORT_SYMBOL_GPL(rt2x00mac_set_key); 537 #endif /* CONFIG_RT2X00_LIB_CRYPTO */ 538 539 void 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 } 547 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start); 548 549 void 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 } 556 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete); 557 558 int 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 } 572 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); 573 574 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, 575 struct ieee80211_vif *vif, 576 struct ieee80211_bss_conf *bss_conf, 577 u32 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 if (!bss_conf->enable_beacon && intf->enable_beacon) { 602 rt2x00dev->intf_beaconing--; 603 intf->enable_beacon = false; 604 605 if (rt2x00dev->intf_beaconing == 0) { 606 /* 607 * Last beaconing interface disabled 608 * -> stop beacon queue. 609 */ 610 rt2x00queue_stop_queue(rt2x00dev->bcn); 611 } 612 /* 613 * Clear beacon in the H/W for this vif. This is needed 614 * to disable beaconing on this particular interface 615 * and keep it running on other interfaces. 616 */ 617 rt2x00queue_clear_beacon(rt2x00dev, vif); 618 } else if (bss_conf->enable_beacon && !intf->enable_beacon) { 619 rt2x00dev->intf_beaconing++; 620 intf->enable_beacon = true; 621 /* 622 * Upload beacon to the H/W. This is only required on 623 * USB devices. PCI devices fetch beacons periodically. 624 */ 625 if (rt2x00_is_usb(rt2x00dev)) 626 rt2x00queue_update_beacon(rt2x00dev, vif); 627 628 if (rt2x00dev->intf_beaconing == 1) { 629 /* 630 * First beaconing interface enabled 631 * -> start beacon queue. 632 */ 633 rt2x00queue_start_queue(rt2x00dev->bcn); 634 } 635 } 636 mutex_unlock(&intf->beacon_skb_mutex); 637 } 638 639 /* 640 * When the association status has changed we must reset the link 641 * tuner counter. This is because some drivers determine if they 642 * should perform link tuning based on the number of seconds 643 * while associated or not associated. 644 */ 645 if (changes & BSS_CHANGED_ASSOC) { 646 rt2x00dev->link.count = 0; 647 648 if (bss_conf->assoc) 649 rt2x00dev->intf_associated++; 650 else 651 rt2x00dev->intf_associated--; 652 653 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); 654 } 655 656 /* 657 * When the erp information has changed, we should perform 658 * additional configuration steps. For all other changes we are done. 659 */ 660 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | 661 BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | 662 BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) 663 rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes); 664 } 665 EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); 666 667 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, 668 struct ieee80211_vif *vif, u16 queue_idx, 669 const struct ieee80211_tx_queue_params *params) 670 { 671 struct rt2x00_dev *rt2x00dev = hw->priv; 672 struct data_queue *queue; 673 674 queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx); 675 if (unlikely(!queue)) 676 return -EINVAL; 677 678 /* 679 * The passed variables are stored as real value ((2^n)-1). 680 * Ralink registers require to know the bit number 'n'. 681 */ 682 if (params->cw_min > 0) 683 queue->cw_min = fls(params->cw_min); 684 else 685 queue->cw_min = 5; /* cw_min: 2^5 = 32. */ 686 687 if (params->cw_max > 0) 688 queue->cw_max = fls(params->cw_max); 689 else 690 queue->cw_max = 10; /* cw_min: 2^10 = 1024. */ 691 692 queue->aifs = params->aifs; 693 queue->txop = params->txop; 694 695 rt2x00_dbg(rt2x00dev, 696 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n", 697 queue_idx, queue->cw_min, queue->cw_max, queue->aifs, 698 queue->txop); 699 700 return 0; 701 } 702 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); 703 704 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw) 705 { 706 struct rt2x00_dev *rt2x00dev = hw->priv; 707 bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev); 708 709 wiphy_rfkill_set_hw_state(hw->wiphy, !active); 710 } 711 EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll); 712 713 void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 714 u32 queues, bool drop) 715 { 716 struct rt2x00_dev *rt2x00dev = hw->priv; 717 struct data_queue *queue; 718 719 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 720 return; 721 722 set_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags); 723 724 tx_queue_for_each(rt2x00dev, queue) 725 rt2x00queue_flush_queue(queue, drop); 726 727 clear_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags); 728 } 729 EXPORT_SYMBOL_GPL(rt2x00mac_flush); 730 731 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) 732 { 733 struct rt2x00_dev *rt2x00dev = hw->priv; 734 struct link_ant *ant = &rt2x00dev->link.ant; 735 struct antenna_setup *def = &rt2x00dev->default_ant; 736 struct antenna_setup setup; 737 738 // The antenna value is not supposed to be 0, 739 // or exceed the maximum number of antenna's. 740 if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3)) 741 return -EINVAL; 742 743 // When the client tried to configure the antenna to or from 744 // diversity mode, we must reset the default antenna as well 745 // as that controls the diversity switch. 746 if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3) 747 ant->flags &= ~ANTENNA_TX_DIVERSITY; 748 if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3) 749 ant->flags &= ~ANTENNA_RX_DIVERSITY; 750 751 // If diversity is being enabled, check if we need hardware 752 // or software diversity. In the latter case, reset the value, 753 // and make sure we update the antenna flags to have the 754 // link tuner pick up the diversity tuning. 755 if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) { 756 tx_ant = ANTENNA_SW_DIVERSITY; 757 ant->flags |= ANTENNA_TX_DIVERSITY; 758 } 759 760 if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) { 761 rx_ant = ANTENNA_SW_DIVERSITY; 762 ant->flags |= ANTENNA_RX_DIVERSITY; 763 } 764 765 setup.tx = tx_ant; 766 setup.rx = rx_ant; 767 setup.rx_chain_num = 0; 768 setup.tx_chain_num = 0; 769 770 rt2x00lib_config_antenna(rt2x00dev, setup); 771 772 return 0; 773 } 774 EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna); 775 776 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) 777 { 778 struct rt2x00_dev *rt2x00dev = hw->priv; 779 struct link_ant *ant = &rt2x00dev->link.ant; 780 struct antenna_setup *active = &rt2x00dev->link.ant.active; 781 782 // When software diversity is active, we must report this to the 783 // client and not the current active antenna state. 784 if (ant->flags & ANTENNA_TX_DIVERSITY) 785 *tx_ant = ANTENNA_HW_DIVERSITY; 786 else 787 *tx_ant = active->tx; 788 789 if (ant->flags & ANTENNA_RX_DIVERSITY) 790 *rx_ant = ANTENNA_HW_DIVERSITY; 791 else 792 *rx_ant = active->rx; 793 794 return 0; 795 } 796 EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna); 797 798 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, 799 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) 800 { 801 struct rt2x00_dev *rt2x00dev = hw->priv; 802 struct data_queue *queue; 803 804 tx_queue_for_each(rt2x00dev, queue) { 805 *tx += queue->length; 806 *tx_max += queue->limit; 807 } 808 809 *rx = rt2x00dev->rx->length; 810 *rx_max = rt2x00dev->rx->limit; 811 } 812 EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam); 813 814 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw) 815 { 816 struct rt2x00_dev *rt2x00dev = hw->priv; 817 struct data_queue *queue; 818 819 tx_queue_for_each(rt2x00dev, queue) { 820 if (!rt2x00queue_empty(queue)) 821 return true; 822 } 823 824 return false; 825 } 826 EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending); 827