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 30 static 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 } 99 100 void 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 /* 147 * Recheck for full queue under lock to avoid race 148 * conditions with rt2x00lib_txdone(). 149 */ 150 spin_lock(&queue->tx_lock); 151 if (rt2x00queue_threshold(queue)) 152 rt2x00queue_pause_queue(queue); 153 spin_unlock(&queue->tx_lock); 154 155 goto exit_free_skb; 156 } 157 158 if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb)) 159 goto exit_free_skb; 160 } 161 162 if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false))) 163 goto exit_free_skb; 164 165 return; 166 167 exit_free_skb: 168 ieee80211_free_txskb(hw, skb); 169 } 170 EXPORT_SYMBOL_GPL(rt2x00mac_tx); 171 172 int rt2x00mac_start(struct ieee80211_hw *hw) 173 { 174 struct rt2x00_dev *rt2x00dev = hw->priv; 175 176 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 177 return 0; 178 179 return rt2x00lib_start(rt2x00dev); 180 } 181 EXPORT_SYMBOL_GPL(rt2x00mac_start); 182 183 void rt2x00mac_stop(struct ieee80211_hw *hw) 184 { 185 struct rt2x00_dev *rt2x00dev = hw->priv; 186 187 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 188 return; 189 190 rt2x00lib_stop(rt2x00dev); 191 } 192 EXPORT_SYMBOL_GPL(rt2x00mac_stop); 193 194 int rt2x00mac_add_interface(struct ieee80211_hw *hw, 195 struct ieee80211_vif *vif) 196 { 197 struct rt2x00_dev *rt2x00dev = hw->priv; 198 struct rt2x00_intf *intf = vif_to_intf(vif); 199 struct data_queue *queue = rt2x00dev->bcn; 200 struct queue_entry *entry = NULL; 201 unsigned int i; 202 203 /* 204 * Don't allow interfaces to be added 205 * the device has disappeared. 206 */ 207 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || 208 !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) 209 return -ENODEV; 210 211 /* 212 * Loop through all beacon queues to find a free 213 * entry. Since there are as much beacon entries 214 * as the maximum interfaces, this search shouldn't 215 * fail. 216 */ 217 for (i = 0; i < queue->limit; i++) { 218 entry = &queue->entries[i]; 219 if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags)) 220 break; 221 } 222 223 if (unlikely(i == queue->limit)) 224 return -ENOBUFS; 225 226 /* 227 * We are now absolutely sure the interface can be created, 228 * increase interface count and start initialization. 229 */ 230 231 if (vif->type == NL80211_IFTYPE_AP) 232 rt2x00dev->intf_ap_count++; 233 else 234 rt2x00dev->intf_sta_count++; 235 236 mutex_init(&intf->beacon_skb_mutex); 237 intf->beacon = entry; 238 239 /* 240 * The MAC address must be configured after the device 241 * has been initialized. Otherwise the device can reset 242 * the MAC registers. 243 * The BSSID address must only be configured in AP mode, 244 * however we should not send an empty BSSID address for 245 * STA interfaces at this time, since this can cause 246 * invalid behavior in the device. 247 */ 248 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, 249 vif->addr, NULL); 250 251 /* 252 * Some filters depend on the current working mode. We can force 253 * an update during the next configure_filter() run by mac80211 by 254 * resetting the current packet_filter state. 255 */ 256 rt2x00dev->packet_filter = 0; 257 258 return 0; 259 } 260 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); 261 262 void rt2x00mac_remove_interface(struct ieee80211_hw *hw, 263 struct ieee80211_vif *vif) 264 { 265 struct rt2x00_dev *rt2x00dev = hw->priv; 266 struct rt2x00_intf *intf = vif_to_intf(vif); 267 268 /* 269 * Don't allow interfaces to be remove while 270 * either the device has disappeared or when 271 * no interface is present. 272 */ 273 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || 274 (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) || 275 (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count)) 276 return; 277 278 if (vif->type == NL80211_IFTYPE_AP) 279 rt2x00dev->intf_ap_count--; 280 else 281 rt2x00dev->intf_sta_count--; 282 283 /* 284 * Release beacon entry so it is available for 285 * new interfaces again. 286 */ 287 clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags); 288 289 /* 290 * Make sure the bssid and mac address registers 291 * are cleared to prevent false ACKing of frames. 292 */ 293 rt2x00lib_config_intf(rt2x00dev, intf, 294 NL80211_IFTYPE_UNSPECIFIED, NULL, NULL); 295 } 296 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); 297 298 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed) 299 { 300 struct rt2x00_dev *rt2x00dev = hw->priv; 301 struct ieee80211_conf *conf = &hw->conf; 302 303 /* 304 * mac80211 might be calling this function while we are trying 305 * to remove the device or perhaps suspending it. 306 */ 307 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 308 return 0; 309 310 /* 311 * Some configuration parameters (e.g. channel and antenna values) can 312 * only be set when the radio is enabled, but do require the RX to 313 * be off. During this period we should keep link tuning enabled, 314 * if for any reason the link tuner must be reset, this will be 315 * handled by rt2x00lib_config(). 316 */ 317 rt2x00queue_stop_queue(rt2x00dev->rx); 318 319 /* Do not race with with link tuner. */ 320 mutex_lock(&rt2x00dev->conf_mutex); 321 322 /* 323 * When we've just turned on the radio, we want to reprogram 324 * everything to ensure a consistent state 325 */ 326 rt2x00lib_config(rt2x00dev, conf, changed); 327 328 /* 329 * After the radio has been enabled we need to configure 330 * the antenna to the default settings. rt2x00lib_config_antenna() 331 * should determine if any action should be taken based on 332 * checking if diversity has been enabled or no antenna changes 333 * have been made since the last configuration change. 334 */ 335 rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant); 336 337 mutex_unlock(&rt2x00dev->conf_mutex); 338 339 /* Turn RX back on */ 340 rt2x00queue_start_queue(rt2x00dev->rx); 341 342 return 0; 343 } 344 EXPORT_SYMBOL_GPL(rt2x00mac_config); 345 346 void rt2x00mac_configure_filter(struct ieee80211_hw *hw, 347 unsigned int changed_flags, 348 unsigned int *total_flags, 349 u64 multicast) 350 { 351 struct rt2x00_dev *rt2x00dev = hw->priv; 352 353 /* 354 * Mask off any flags we are going to ignore 355 * from the total_flags field. 356 */ 357 *total_flags &= 358 FIF_ALLMULTI | 359 FIF_FCSFAIL | 360 FIF_PLCPFAIL | 361 FIF_CONTROL | 362 FIF_PSPOLL | 363 FIF_OTHER_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; 372 373 /* 374 * If the device has a single filter for all control frames, 375 * FIF_CONTROL and FIF_PSPOLL flags imply each other. 376 * And if the device has more than one filter for control frames 377 * of different types, but has no a separate filter for PS Poll frames, 378 * FIF_CONTROL flag implies FIF_PSPOLL. 379 */ 380 if (!rt2x00_has_cap_control_filters(rt2x00dev)) { 381 if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL) 382 *total_flags |= FIF_CONTROL | FIF_PSPOLL; 383 } 384 if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) { 385 if (*total_flags & FIF_CONTROL) 386 *total_flags |= FIF_PSPOLL; 387 } 388 389 rt2x00dev->packet_filter = *total_flags; 390 391 rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags); 392 } 393 EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter); 394 395 static void rt2x00mac_set_tim_iter(void *data, u8 *mac, 396 struct ieee80211_vif *vif) 397 { 398 struct rt2x00_intf *intf = vif_to_intf(vif); 399 400 if (vif->type != NL80211_IFTYPE_AP && 401 vif->type != NL80211_IFTYPE_ADHOC && 402 vif->type != NL80211_IFTYPE_MESH_POINT && 403 vif->type != NL80211_IFTYPE_WDS) 404 return; 405 406 set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags); 407 } 408 409 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 410 bool set) 411 { 412 struct rt2x00_dev *rt2x00dev = hw->priv; 413 414 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) 415 return 0; 416 417 ieee80211_iterate_active_interfaces_atomic( 418 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 419 rt2x00mac_set_tim_iter, rt2x00dev); 420 421 /* queue work to upodate the beacon template */ 422 ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work); 423 return 0; 424 } 425 EXPORT_SYMBOL_GPL(rt2x00mac_set_tim); 426 427 #ifdef CONFIG_RT2X00_LIB_CRYPTO 428 static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len) 429 { 430 if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY) 431 memcpy(crypto->key, 432 &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY], 433 sizeof(crypto->key)); 434 435 if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY) 436 memcpy(crypto->tx_mic, 437 &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 438 sizeof(crypto->tx_mic)); 439 440 if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY) 441 memcpy(crypto->rx_mic, 442 &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 443 sizeof(crypto->rx_mic)); 444 } 445 446 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 447 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 448 struct ieee80211_key_conf *key) 449 { 450 struct rt2x00_dev *rt2x00dev = hw->priv; 451 int (*set_key) (struct rt2x00_dev *rt2x00dev, 452 struct rt2x00lib_crypto *crypto, 453 struct ieee80211_key_conf *key); 454 struct rt2x00lib_crypto crypto; 455 static const u8 bcast_addr[ETH_ALEN] = 456 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; 457 struct rt2x00_sta *sta_priv = NULL; 458 459 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 460 return 0; 461 462 if (!rt2x00_has_cap_hw_crypto(rt2x00dev)) 463 return -EOPNOTSUPP; 464 465 /* 466 * To support IBSS RSN, don't program group keys in IBSS, the 467 * hardware will then not attempt to decrypt the frames. 468 */ 469 if (vif->type == NL80211_IFTYPE_ADHOC && 470 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) 471 return -EOPNOTSUPP; 472 473 if (key->keylen > 32) 474 return -ENOSPC; 475 476 memset(&crypto, 0, sizeof(crypto)); 477 478 crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif); 479 crypto.cipher = rt2x00crypto_key_to_cipher(key); 480 if (crypto.cipher == CIPHER_NONE) 481 return -EOPNOTSUPP; 482 if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev)) 483 return -EOPNOTSUPP; 484 485 crypto.cmd = cmd; 486 487 if (sta) { 488 crypto.address = sta->addr; 489 sta_priv = sta_to_rt2x00_sta(sta); 490 crypto.wcid = sta_priv->wcid; 491 } else 492 crypto.address = bcast_addr; 493 494 if (crypto.cipher == CIPHER_TKIP) 495 memcpy_tkip(&crypto, &key->key[0], key->keylen); 496 else 497 memcpy(crypto.key, &key->key[0], key->keylen); 498 /* 499 * Each BSS has a maximum of 4 shared keys. 500 * Shared key index values: 501 * 0) BSS0 key0 502 * 1) BSS0 key1 503 * ... 504 * 4) BSS1 key0 505 * ... 506 * 8) BSS2 key0 507 * ... 508 * Both pairwise as shared key indeces are determined by 509 * driver. This is required because the hardware requires 510 * keys to be assigned in correct order (When key 1 is 511 * provided but key 0 is not, then the key is not found 512 * by the hardware during RX). 513 */ 514 if (cmd == SET_KEY) 515 key->hw_key_idx = 0; 516 517 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) 518 set_key = rt2x00dev->ops->lib->config_pairwise_key; 519 else 520 set_key = rt2x00dev->ops->lib->config_shared_key; 521 522 if (!set_key) 523 return -EOPNOTSUPP; 524 525 return set_key(rt2x00dev, &crypto, key); 526 } 527 EXPORT_SYMBOL_GPL(rt2x00mac_set_key); 528 #endif /* CONFIG_RT2X00_LIB_CRYPTO */ 529 530 int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 531 struct ieee80211_sta *sta) 532 { 533 struct rt2x00_dev *rt2x00dev = hw->priv; 534 535 return rt2x00dev->ops->lib->sta_add(rt2x00dev, vif, sta); 536 } 537 EXPORT_SYMBOL_GPL(rt2x00mac_sta_add); 538 539 int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 540 struct ieee80211_sta *sta) 541 { 542 struct rt2x00_dev *rt2x00dev = hw->priv; 543 544 return rt2x00dev->ops->lib->sta_remove(rt2x00dev, sta); 545 } 546 EXPORT_SYMBOL_GPL(rt2x00mac_sta_remove); 547 548 void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw, 549 struct ieee80211_vif *vif, 550 const u8 *mac_addr) 551 { 552 struct rt2x00_dev *rt2x00dev = hw->priv; 553 set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); 554 rt2x00link_stop_tuner(rt2x00dev); 555 } 556 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start); 557 558 void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw, 559 struct ieee80211_vif *vif) 560 { 561 struct rt2x00_dev *rt2x00dev = hw->priv; 562 clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); 563 rt2x00link_start_tuner(rt2x00dev); 564 } 565 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete); 566 567 int rt2x00mac_get_stats(struct ieee80211_hw *hw, 568 struct ieee80211_low_level_stats *stats) 569 { 570 struct rt2x00_dev *rt2x00dev = hw->priv; 571 572 /* 573 * The dot11ACKFailureCount, dot11RTSFailureCount and 574 * dot11RTSSuccessCount are updated in interrupt time. 575 * dot11FCSErrorCount is updated in the link tuner. 576 */ 577 memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats)); 578 579 return 0; 580 } 581 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); 582 583 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, 584 struct ieee80211_vif *vif, 585 struct ieee80211_bss_conf *bss_conf, 586 u32 changes) 587 { 588 struct rt2x00_dev *rt2x00dev = hw->priv; 589 struct rt2x00_intf *intf = vif_to_intf(vif); 590 591 /* 592 * mac80211 might be calling this function while we are trying 593 * to remove the device or perhaps suspending it. 594 */ 595 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 596 return; 597 598 /* 599 * Update the BSSID. 600 */ 601 if (changes & BSS_CHANGED_BSSID) 602 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL, 603 bss_conf->bssid); 604 605 /* 606 * Start/stop beaconing. 607 */ 608 if (changes & BSS_CHANGED_BEACON_ENABLED) { 609 mutex_lock(&intf->beacon_skb_mutex); 610 if (!bss_conf->enable_beacon && intf->enable_beacon) { 611 rt2x00dev->intf_beaconing--; 612 intf->enable_beacon = false; 613 614 if (rt2x00dev->intf_beaconing == 0) { 615 /* 616 * Last beaconing interface disabled 617 * -> stop beacon queue. 618 */ 619 rt2x00queue_stop_queue(rt2x00dev->bcn); 620 } 621 /* 622 * Clear beacon in the H/W for this vif. This is needed 623 * to disable beaconing on this particular interface 624 * and keep it running on other interfaces. 625 */ 626 rt2x00queue_clear_beacon(rt2x00dev, vif); 627 } else if (bss_conf->enable_beacon && !intf->enable_beacon) { 628 rt2x00dev->intf_beaconing++; 629 intf->enable_beacon = true; 630 /* 631 * Upload beacon to the H/W. This is only required on 632 * USB devices. PCI devices fetch beacons periodically. 633 */ 634 if (rt2x00_is_usb(rt2x00dev)) 635 rt2x00queue_update_beacon(rt2x00dev, vif); 636 637 if (rt2x00dev->intf_beaconing == 1) { 638 /* 639 * First beaconing interface enabled 640 * -> start beacon queue. 641 */ 642 rt2x00queue_start_queue(rt2x00dev->bcn); 643 } 644 } 645 mutex_unlock(&intf->beacon_skb_mutex); 646 } 647 648 /* 649 * When the association status has changed we must reset the link 650 * tuner counter. This is because some drivers determine if they 651 * should perform link tuning based on the number of seconds 652 * while associated or not associated. 653 */ 654 if (changes & BSS_CHANGED_ASSOC) { 655 rt2x00dev->link.count = 0; 656 657 if (bss_conf->assoc) 658 rt2x00dev->intf_associated++; 659 else 660 rt2x00dev->intf_associated--; 661 662 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); 663 664 clear_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); 665 } 666 667 /* 668 * Check for access point which do not support 802.11e . We have to 669 * generate data frames sequence number in S/W for such AP, because 670 * of H/W bug. 671 */ 672 if (changes & BSS_CHANGED_QOS && !bss_conf->qos) 673 set_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); 674 675 /* 676 * When the erp information has changed, we should perform 677 * additional configuration steps. For all other changes we are done. 678 */ 679 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | 680 BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | 681 BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) 682 rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes); 683 } 684 EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); 685 686 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, 687 struct ieee80211_vif *vif, u16 queue_idx, 688 const struct ieee80211_tx_queue_params *params) 689 { 690 struct rt2x00_dev *rt2x00dev = hw->priv; 691 struct data_queue *queue; 692 693 queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx); 694 if (unlikely(!queue)) 695 return -EINVAL; 696 697 /* 698 * The passed variables are stored as real value ((2^n)-1). 699 * Ralink registers require to know the bit number 'n'. 700 */ 701 if (params->cw_min > 0) 702 queue->cw_min = fls(params->cw_min); 703 else 704 queue->cw_min = 5; /* cw_min: 2^5 = 32. */ 705 706 if (params->cw_max > 0) 707 queue->cw_max = fls(params->cw_max); 708 else 709 queue->cw_max = 10; /* cw_min: 2^10 = 1024. */ 710 711 queue->aifs = params->aifs; 712 queue->txop = params->txop; 713 714 rt2x00_dbg(rt2x00dev, 715 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n", 716 queue_idx, queue->cw_min, queue->cw_max, queue->aifs, 717 queue->txop); 718 719 return 0; 720 } 721 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); 722 723 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw) 724 { 725 struct rt2x00_dev *rt2x00dev = hw->priv; 726 bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev); 727 728 wiphy_rfkill_set_hw_state(hw->wiphy, !active); 729 } 730 EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll); 731 732 void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 733 u32 queues, bool drop) 734 { 735 struct rt2x00_dev *rt2x00dev = hw->priv; 736 struct data_queue *queue; 737 738 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 739 return; 740 741 tx_queue_for_each(rt2x00dev, queue) 742 rt2x00queue_flush_queue(queue, drop); 743 } 744 EXPORT_SYMBOL_GPL(rt2x00mac_flush); 745 746 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) 747 { 748 struct rt2x00_dev *rt2x00dev = hw->priv; 749 struct link_ant *ant = &rt2x00dev->link.ant; 750 struct antenna_setup *def = &rt2x00dev->default_ant; 751 struct antenna_setup setup; 752 753 // The antenna value is not supposed to be 0, 754 // or exceed the maximum number of antenna's. 755 if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3)) 756 return -EINVAL; 757 758 // When the client tried to configure the antenna to or from 759 // diversity mode, we must reset the default antenna as well 760 // as that controls the diversity switch. 761 if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3) 762 ant->flags &= ~ANTENNA_TX_DIVERSITY; 763 if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3) 764 ant->flags &= ~ANTENNA_RX_DIVERSITY; 765 766 // If diversity is being enabled, check if we need hardware 767 // or software diversity. In the latter case, reset the value, 768 // and make sure we update the antenna flags to have the 769 // link tuner pick up the diversity tuning. 770 if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) { 771 tx_ant = ANTENNA_SW_DIVERSITY; 772 ant->flags |= ANTENNA_TX_DIVERSITY; 773 } 774 775 if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) { 776 rx_ant = ANTENNA_SW_DIVERSITY; 777 ant->flags |= ANTENNA_RX_DIVERSITY; 778 } 779 780 setup.tx = tx_ant; 781 setup.rx = rx_ant; 782 setup.rx_chain_num = 0; 783 setup.tx_chain_num = 0; 784 785 rt2x00lib_config_antenna(rt2x00dev, setup); 786 787 return 0; 788 } 789 EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna); 790 791 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) 792 { 793 struct rt2x00_dev *rt2x00dev = hw->priv; 794 struct link_ant *ant = &rt2x00dev->link.ant; 795 struct antenna_setup *active = &rt2x00dev->link.ant.active; 796 797 // When software diversity is active, we must report this to the 798 // client and not the current active antenna state. 799 if (ant->flags & ANTENNA_TX_DIVERSITY) 800 *tx_ant = ANTENNA_HW_DIVERSITY; 801 else 802 *tx_ant = active->tx; 803 804 if (ant->flags & ANTENNA_RX_DIVERSITY) 805 *rx_ant = ANTENNA_HW_DIVERSITY; 806 else 807 *rx_ant = active->rx; 808 809 return 0; 810 } 811 EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna); 812 813 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, 814 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) 815 { 816 struct rt2x00_dev *rt2x00dev = hw->priv; 817 struct data_queue *queue; 818 819 tx_queue_for_each(rt2x00dev, queue) { 820 *tx += queue->length; 821 *tx_max += queue->limit; 822 } 823 824 *rx = rt2x00dev->rx->length; 825 *rx_max = rt2x00dev->rx->limit; 826 } 827 EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam); 828 829 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw) 830 { 831 struct rt2x00_dev *rt2x00dev = hw->priv; 832 struct data_queue *queue; 833 834 tx_queue_for_each(rt2x00dev, queue) { 835 if (!rt2x00queue_empty(queue)) 836 return true; 837 } 838 839 return false; 840 } 841 EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending); 842