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 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 } 174 EXPORT_SYMBOL_GPL(rt2x00mac_tx); 175 176 int 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 } 185 EXPORT_SYMBOL_GPL(rt2x00mac_start); 186 187 void 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 } 196 EXPORT_SYMBOL_GPL(rt2x00mac_stop); 197 198 int 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 } 264 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); 265 266 void 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 } 300 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); 301 302 int 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 /* Do not race with with link tuner. */ 324 mutex_lock(&rt2x00dev->conf_mutex); 325 326 /* 327 * When we've just turned on the radio, we want to reprogram 328 * everything to ensure a consistent state 329 */ 330 rt2x00lib_config(rt2x00dev, conf, changed); 331 332 /* 333 * After the radio has been enabled we need to configure 334 * the antenna to the default settings. rt2x00lib_config_antenna() 335 * should determine if any action should be taken based on 336 * checking if diversity has been enabled or no antenna changes 337 * have been made since the last configuration change. 338 */ 339 rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant); 340 341 mutex_unlock(&rt2x00dev->conf_mutex); 342 343 /* Turn RX back on */ 344 rt2x00queue_start_queue(rt2x00dev->rx); 345 346 return 0; 347 } 348 EXPORT_SYMBOL_GPL(rt2x00mac_config); 349 350 void rt2x00mac_configure_filter(struct ieee80211_hw *hw, 351 unsigned int changed_flags, 352 unsigned int *total_flags, 353 u64 multicast) 354 { 355 struct rt2x00_dev *rt2x00dev = hw->priv; 356 357 /* 358 * Mask off any flags we are going to ignore 359 * from the total_flags field. 360 */ 361 *total_flags &= 362 FIF_ALLMULTI | 363 FIF_FCSFAIL | 364 FIF_PLCPFAIL | 365 FIF_CONTROL | 366 FIF_PSPOLL | 367 FIF_OTHER_BSS; 368 369 /* 370 * Apply some rules to the filters: 371 * - Some filters imply different filters to be set. 372 * - Some things we can't filter out at all. 373 * - Multicast filter seems to kill broadcast traffic so never use it. 374 */ 375 *total_flags |= FIF_ALLMULTI; 376 377 /* 378 * If the device has a single filter for all control frames, 379 * FIF_CONTROL and FIF_PSPOLL flags imply each other. 380 * And if the device has more than one filter for control frames 381 * of different types, but has no a separate filter for PS Poll frames, 382 * FIF_CONTROL flag implies FIF_PSPOLL. 383 */ 384 if (!rt2x00_has_cap_control_filters(rt2x00dev)) { 385 if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL) 386 *total_flags |= FIF_CONTROL | FIF_PSPOLL; 387 } 388 if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) { 389 if (*total_flags & FIF_CONTROL) 390 *total_flags |= FIF_PSPOLL; 391 } 392 393 rt2x00dev->packet_filter = *total_flags; 394 395 rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags); 396 } 397 EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter); 398 399 static void rt2x00mac_set_tim_iter(void *data, u8 *mac, 400 struct ieee80211_vif *vif) 401 { 402 struct rt2x00_intf *intf = vif_to_intf(vif); 403 404 if (vif->type != NL80211_IFTYPE_AP && 405 vif->type != NL80211_IFTYPE_ADHOC && 406 vif->type != NL80211_IFTYPE_MESH_POINT && 407 vif->type != NL80211_IFTYPE_WDS) 408 return; 409 410 set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags); 411 } 412 413 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 414 bool set) 415 { 416 struct rt2x00_dev *rt2x00dev = hw->priv; 417 418 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) 419 return 0; 420 421 ieee80211_iterate_active_interfaces_atomic( 422 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 423 rt2x00mac_set_tim_iter, rt2x00dev); 424 425 /* queue work to upodate the beacon template */ 426 ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work); 427 return 0; 428 } 429 EXPORT_SYMBOL_GPL(rt2x00mac_set_tim); 430 431 #ifdef CONFIG_RT2X00_LIB_CRYPTO 432 static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len) 433 { 434 if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY) 435 memcpy(crypto->key, 436 &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY], 437 sizeof(crypto->key)); 438 439 if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY) 440 memcpy(crypto->tx_mic, 441 &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 442 sizeof(crypto->tx_mic)); 443 444 if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY) 445 memcpy(crypto->rx_mic, 446 &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 447 sizeof(crypto->rx_mic)); 448 } 449 450 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 451 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 452 struct ieee80211_key_conf *key) 453 { 454 struct rt2x00_dev *rt2x00dev = hw->priv; 455 int (*set_key) (struct rt2x00_dev *rt2x00dev, 456 struct rt2x00lib_crypto *crypto, 457 struct ieee80211_key_conf *key); 458 struct rt2x00lib_crypto crypto; 459 static const u8 bcast_addr[ETH_ALEN] = 460 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; 461 struct rt2x00_sta *sta_priv = NULL; 462 463 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 464 return 0; 465 466 if (!rt2x00_has_cap_hw_crypto(rt2x00dev)) 467 return -EOPNOTSUPP; 468 469 /* 470 * To support IBSS RSN, don't program group keys in IBSS, the 471 * hardware will then not attempt to decrypt the frames. 472 */ 473 if (vif->type == NL80211_IFTYPE_ADHOC && 474 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) 475 return -EOPNOTSUPP; 476 477 if (key->keylen > 32) 478 return -ENOSPC; 479 480 memset(&crypto, 0, sizeof(crypto)); 481 482 crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif); 483 crypto.cipher = rt2x00crypto_key_to_cipher(key); 484 if (crypto.cipher == CIPHER_NONE) 485 return -EOPNOTSUPP; 486 if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev)) 487 return -EOPNOTSUPP; 488 489 crypto.cmd = cmd; 490 491 if (sta) { 492 crypto.address = sta->addr; 493 sta_priv = sta_to_rt2x00_sta(sta); 494 crypto.wcid = sta_priv->wcid; 495 } else 496 crypto.address = bcast_addr; 497 498 if (crypto.cipher == CIPHER_TKIP) 499 memcpy_tkip(&crypto, &key->key[0], key->keylen); 500 else 501 memcpy(crypto.key, &key->key[0], key->keylen); 502 /* 503 * Each BSS has a maximum of 4 shared keys. 504 * Shared key index values: 505 * 0) BSS0 key0 506 * 1) BSS0 key1 507 * ... 508 * 4) BSS1 key0 509 * ... 510 * 8) BSS2 key0 511 * ... 512 * Both pairwise as shared key indeces are determined by 513 * driver. This is required because the hardware requires 514 * keys to be assigned in correct order (When key 1 is 515 * provided but key 0 is not, then the key is not found 516 * by the hardware during RX). 517 */ 518 if (cmd == SET_KEY) 519 key->hw_key_idx = 0; 520 521 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) 522 set_key = rt2x00dev->ops->lib->config_pairwise_key; 523 else 524 set_key = rt2x00dev->ops->lib->config_shared_key; 525 526 if (!set_key) 527 return -EOPNOTSUPP; 528 529 return set_key(rt2x00dev, &crypto, key); 530 } 531 EXPORT_SYMBOL_GPL(rt2x00mac_set_key); 532 #endif /* CONFIG_RT2X00_LIB_CRYPTO */ 533 534 int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 535 struct ieee80211_sta *sta) 536 { 537 struct rt2x00_dev *rt2x00dev = hw->priv; 538 539 return rt2x00dev->ops->lib->sta_add(rt2x00dev, vif, sta); 540 } 541 EXPORT_SYMBOL_GPL(rt2x00mac_sta_add); 542 543 int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 544 struct ieee80211_sta *sta) 545 { 546 struct rt2x00_dev *rt2x00dev = hw->priv; 547 548 return rt2x00dev->ops->lib->sta_remove(rt2x00dev, sta); 549 } 550 EXPORT_SYMBOL_GPL(rt2x00mac_sta_remove); 551 552 void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw, 553 struct ieee80211_vif *vif, 554 const u8 *mac_addr) 555 { 556 struct rt2x00_dev *rt2x00dev = hw->priv; 557 set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); 558 rt2x00link_stop_tuner(rt2x00dev); 559 } 560 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start); 561 562 void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw, 563 struct ieee80211_vif *vif) 564 { 565 struct rt2x00_dev *rt2x00dev = hw->priv; 566 clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); 567 rt2x00link_start_tuner(rt2x00dev); 568 } 569 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete); 570 571 int rt2x00mac_get_stats(struct ieee80211_hw *hw, 572 struct ieee80211_low_level_stats *stats) 573 { 574 struct rt2x00_dev *rt2x00dev = hw->priv; 575 576 /* 577 * The dot11ACKFailureCount, dot11RTSFailureCount and 578 * dot11RTSSuccessCount are updated in interrupt time. 579 * dot11FCSErrorCount is updated in the link tuner. 580 */ 581 memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats)); 582 583 return 0; 584 } 585 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); 586 587 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, 588 struct ieee80211_vif *vif, 589 struct ieee80211_bss_conf *bss_conf, 590 u32 changes) 591 { 592 struct rt2x00_dev *rt2x00dev = hw->priv; 593 struct rt2x00_intf *intf = vif_to_intf(vif); 594 595 /* 596 * mac80211 might be calling this function while we are trying 597 * to remove the device or perhaps suspending it. 598 */ 599 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 600 return; 601 602 /* 603 * Update the BSSID. 604 */ 605 if (changes & BSS_CHANGED_BSSID) 606 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL, 607 bss_conf->bssid); 608 609 /* 610 * Start/stop beaconing. 611 */ 612 if (changes & BSS_CHANGED_BEACON_ENABLED) { 613 mutex_lock(&intf->beacon_skb_mutex); 614 if (!bss_conf->enable_beacon && intf->enable_beacon) { 615 rt2x00dev->intf_beaconing--; 616 intf->enable_beacon = false; 617 618 if (rt2x00dev->intf_beaconing == 0) { 619 /* 620 * Last beaconing interface disabled 621 * -> stop beacon queue. 622 */ 623 rt2x00queue_stop_queue(rt2x00dev->bcn); 624 } 625 /* 626 * Clear beacon in the H/W for this vif. This is needed 627 * to disable beaconing on this particular interface 628 * and keep it running on other interfaces. 629 */ 630 rt2x00queue_clear_beacon(rt2x00dev, vif); 631 } else if (bss_conf->enable_beacon && !intf->enable_beacon) { 632 rt2x00dev->intf_beaconing++; 633 intf->enable_beacon = true; 634 /* 635 * Upload beacon to the H/W. This is only required on 636 * USB devices. PCI devices fetch beacons periodically. 637 */ 638 if (rt2x00_is_usb(rt2x00dev)) 639 rt2x00queue_update_beacon(rt2x00dev, vif); 640 641 if (rt2x00dev->intf_beaconing == 1) { 642 /* 643 * First beaconing interface enabled 644 * -> start beacon queue. 645 */ 646 rt2x00queue_start_queue(rt2x00dev->bcn); 647 } 648 } 649 mutex_unlock(&intf->beacon_skb_mutex); 650 } 651 652 /* 653 * When the association status has changed we must reset the link 654 * tuner counter. This is because some drivers determine if they 655 * should perform link tuning based on the number of seconds 656 * while associated or not associated. 657 */ 658 if (changes & BSS_CHANGED_ASSOC) { 659 rt2x00dev->link.count = 0; 660 661 if (bss_conf->assoc) 662 rt2x00dev->intf_associated++; 663 else 664 rt2x00dev->intf_associated--; 665 666 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); 667 668 clear_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); 669 } 670 671 /* 672 * Check for access point which do not support 802.11e . We have to 673 * generate data frames sequence number in S/W for such AP, because 674 * of H/W bug. 675 */ 676 if (changes & BSS_CHANGED_QOS && !bss_conf->qos) 677 set_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); 678 679 /* 680 * When the erp information has changed, we should perform 681 * additional configuration steps. For all other changes we are done. 682 */ 683 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | 684 BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | 685 BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) 686 rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes); 687 } 688 EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); 689 690 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, 691 struct ieee80211_vif *vif, u16 queue_idx, 692 const struct ieee80211_tx_queue_params *params) 693 { 694 struct rt2x00_dev *rt2x00dev = hw->priv; 695 struct data_queue *queue; 696 697 queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx); 698 if (unlikely(!queue)) 699 return -EINVAL; 700 701 /* 702 * The passed variables are stored as real value ((2^n)-1). 703 * Ralink registers require to know the bit number 'n'. 704 */ 705 if (params->cw_min > 0) 706 queue->cw_min = fls(params->cw_min); 707 else 708 queue->cw_min = 5; /* cw_min: 2^5 = 32. */ 709 710 if (params->cw_max > 0) 711 queue->cw_max = fls(params->cw_max); 712 else 713 queue->cw_max = 10; /* cw_min: 2^10 = 1024. */ 714 715 queue->aifs = params->aifs; 716 queue->txop = params->txop; 717 718 rt2x00_dbg(rt2x00dev, 719 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n", 720 queue_idx, queue->cw_min, queue->cw_max, queue->aifs, 721 queue->txop); 722 723 return 0; 724 } 725 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); 726 727 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw) 728 { 729 struct rt2x00_dev *rt2x00dev = hw->priv; 730 bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev); 731 732 wiphy_rfkill_set_hw_state(hw->wiphy, !active); 733 } 734 EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll); 735 736 void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 737 u32 queues, bool drop) 738 { 739 struct rt2x00_dev *rt2x00dev = hw->priv; 740 struct data_queue *queue; 741 742 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) 743 return; 744 745 tx_queue_for_each(rt2x00dev, queue) 746 if (!rt2x00queue_empty(queue)) 747 rt2x00queue_flush_queue(queue, drop); 748 } 749 EXPORT_SYMBOL_GPL(rt2x00mac_flush); 750 751 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) 752 { 753 struct rt2x00_dev *rt2x00dev = hw->priv; 754 struct link_ant *ant = &rt2x00dev->link.ant; 755 struct antenna_setup *def = &rt2x00dev->default_ant; 756 struct antenna_setup setup; 757 758 // The antenna value is not supposed to be 0, 759 // or exceed the maximum number of antenna's. 760 if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3)) 761 return -EINVAL; 762 763 // When the client tried to configure the antenna to or from 764 // diversity mode, we must reset the default antenna as well 765 // as that controls the diversity switch. 766 if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3) 767 ant->flags &= ~ANTENNA_TX_DIVERSITY; 768 if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3) 769 ant->flags &= ~ANTENNA_RX_DIVERSITY; 770 771 // If diversity is being enabled, check if we need hardware 772 // or software diversity. In the latter case, reset the value, 773 // and make sure we update the antenna flags to have the 774 // link tuner pick up the diversity tuning. 775 if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) { 776 tx_ant = ANTENNA_SW_DIVERSITY; 777 ant->flags |= ANTENNA_TX_DIVERSITY; 778 } 779 780 if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) { 781 rx_ant = ANTENNA_SW_DIVERSITY; 782 ant->flags |= ANTENNA_RX_DIVERSITY; 783 } 784 785 setup.tx = tx_ant; 786 setup.rx = rx_ant; 787 setup.rx_chain_num = 0; 788 setup.tx_chain_num = 0; 789 790 rt2x00lib_config_antenna(rt2x00dev, setup); 791 792 return 0; 793 } 794 EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna); 795 796 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) 797 { 798 struct rt2x00_dev *rt2x00dev = hw->priv; 799 struct link_ant *ant = &rt2x00dev->link.ant; 800 struct antenna_setup *active = &rt2x00dev->link.ant.active; 801 802 // When software diversity is active, we must report this to the 803 // client and not the current active antenna state. 804 if (ant->flags & ANTENNA_TX_DIVERSITY) 805 *tx_ant = ANTENNA_HW_DIVERSITY; 806 else 807 *tx_ant = active->tx; 808 809 if (ant->flags & ANTENNA_RX_DIVERSITY) 810 *rx_ant = ANTENNA_HW_DIVERSITY; 811 else 812 *rx_ant = active->rx; 813 814 return 0; 815 } 816 EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna); 817 818 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, 819 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) 820 { 821 struct rt2x00_dev *rt2x00dev = hw->priv; 822 struct data_queue *queue; 823 824 tx_queue_for_each(rt2x00dev, queue) { 825 *tx += queue->length; 826 *tx_max += queue->limit; 827 } 828 829 *rx = rt2x00dev->rx->length; 830 *rx_max = rt2x00dev->rx->limit; 831 } 832 EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam); 833 834 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw) 835 { 836 struct rt2x00_dev *rt2x00dev = hw->priv; 837 struct data_queue *queue; 838 839 tx_queue_for_each(rt2x00dev, queue) { 840 if (!rt2x00queue_empty(queue)) 841 return true; 842 } 843 844 return false; 845 } 846 EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending); 847