1 /*- 2 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 3 * Copyright (c) 2004-2005 Atheros Communications, Inc. 4 * Copyright (c) 2006 Devicescape Software, Inc. 5 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com> 6 * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu> 7 * Copyright (c) 2010 Bruno Randolf <br1@einfach.org> 8 * 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 19 * redistribution must be conditioned upon including a substantially 20 * similar Disclaimer requirement for further binary redistribution. 21 * 3. Neither the names of the above-listed copyright holders nor the names 22 * of any contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * Alternatively, this software may be distributed under the terms of the 26 * GNU General Public License ("GPL") version 2 as published by the Free 27 * Software Foundation. 28 * 29 * NO WARRANTY 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 32 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 33 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 34 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 35 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 38 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 40 * THE POSSIBILITY OF SUCH DAMAGES. 41 * 42 */ 43 44 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 45 46 #include <net/mac80211.h> 47 #include <asm/unaligned.h> 48 49 #include "ath5k.h" 50 #include "base.h" 51 #include "reg.h" 52 53 /********************\ 54 * Mac80211 functions * 55 \********************/ 56 57 static void 58 ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb) 59 { 60 struct ath5k_hw *ah = hw->priv; 61 u16 qnum = skb_get_queue_mapping(skb); 62 63 if (WARN_ON(qnum >= ah->ah_capabilities.cap_queues.q_tx_num)) { 64 dev_kfree_skb_any(skb); 65 return; 66 } 67 68 ath5k_tx_queue(hw, skb, &ah->txqs[qnum]); 69 } 70 71 72 static int 73 ath5k_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 74 { 75 struct ath5k_hw *ah = hw->priv; 76 int ret; 77 struct ath5k_vif *avf = (void *)vif->drv_priv; 78 79 mutex_lock(&ah->lock); 80 81 if ((vif->type == NL80211_IFTYPE_AP || 82 vif->type == NL80211_IFTYPE_ADHOC) 83 && (ah->num_ap_vifs + ah->num_adhoc_vifs) >= ATH_BCBUF) { 84 ret = -ELNRNG; 85 goto end; 86 } 87 88 /* Don't allow other interfaces if one ad-hoc is configured. 89 * TODO: Fix the problems with ad-hoc and multiple other interfaces. 90 * We would need to operate the HW in ad-hoc mode to allow TSF updates 91 * for the IBSS, but this breaks with additional AP or STA interfaces 92 * at the moment. */ 93 if (ah->num_adhoc_vifs || 94 (ah->nvifs && vif->type == NL80211_IFTYPE_ADHOC)) { 95 ATH5K_ERR(ah, "Only one single ad-hoc interface is allowed.\n"); 96 ret = -ELNRNG; 97 goto end; 98 } 99 100 switch (vif->type) { 101 case NL80211_IFTYPE_AP: 102 case NL80211_IFTYPE_STATION: 103 case NL80211_IFTYPE_ADHOC: 104 case NL80211_IFTYPE_MESH_POINT: 105 avf->opmode = vif->type; 106 break; 107 default: 108 ret = -EOPNOTSUPP; 109 goto end; 110 } 111 112 ah->nvifs++; 113 ATH5K_DBG(ah, ATH5K_DEBUG_MODE, "add interface mode %d\n", avf->opmode); 114 115 /* Assign the vap/adhoc to a beacon xmit slot. */ 116 if ((avf->opmode == NL80211_IFTYPE_AP) || 117 (avf->opmode == NL80211_IFTYPE_ADHOC) || 118 (avf->opmode == NL80211_IFTYPE_MESH_POINT)) { 119 int slot; 120 121 WARN_ON(list_empty(&ah->bcbuf)); 122 avf->bbuf = list_first_entry(&ah->bcbuf, struct ath5k_buf, 123 list); 124 list_del(&avf->bbuf->list); 125 126 avf->bslot = 0; 127 for (slot = 0; slot < ATH_BCBUF; slot++) { 128 if (!ah->bslot[slot]) { 129 avf->bslot = slot; 130 break; 131 } 132 } 133 BUG_ON(ah->bslot[avf->bslot] != NULL); 134 ah->bslot[avf->bslot] = vif; 135 if (avf->opmode == NL80211_IFTYPE_AP) 136 ah->num_ap_vifs++; 137 else if (avf->opmode == NL80211_IFTYPE_ADHOC) 138 ah->num_adhoc_vifs++; 139 else if (avf->opmode == NL80211_IFTYPE_MESH_POINT) 140 ah->num_mesh_vifs++; 141 } 142 143 /* Any MAC address is fine, all others are included through the 144 * filter. 145 */ 146 ath5k_hw_set_lladdr(ah, vif->addr); 147 148 ath5k_update_bssid_mask_and_opmode(ah, vif); 149 ret = 0; 150 end: 151 mutex_unlock(&ah->lock); 152 return ret; 153 } 154 155 156 static void 157 ath5k_remove_interface(struct ieee80211_hw *hw, 158 struct ieee80211_vif *vif) 159 { 160 struct ath5k_hw *ah = hw->priv; 161 struct ath5k_vif *avf = (void *)vif->drv_priv; 162 unsigned int i; 163 164 mutex_lock(&ah->lock); 165 ah->nvifs--; 166 167 if (avf->bbuf) { 168 ath5k_txbuf_free_skb(ah, avf->bbuf); 169 list_add_tail(&avf->bbuf->list, &ah->bcbuf); 170 for (i = 0; i < ATH_BCBUF; i++) { 171 if (ah->bslot[i] == vif) { 172 ah->bslot[i] = NULL; 173 break; 174 } 175 } 176 avf->bbuf = NULL; 177 } 178 if (avf->opmode == NL80211_IFTYPE_AP) 179 ah->num_ap_vifs--; 180 else if (avf->opmode == NL80211_IFTYPE_ADHOC) 181 ah->num_adhoc_vifs--; 182 else if (avf->opmode == NL80211_IFTYPE_MESH_POINT) 183 ah->num_mesh_vifs--; 184 185 ath5k_update_bssid_mask_and_opmode(ah, NULL); 186 mutex_unlock(&ah->lock); 187 } 188 189 190 /* 191 * TODO: Phy disable/diversity etc 192 */ 193 static int 194 ath5k_config(struct ieee80211_hw *hw, u32 changed) 195 { 196 struct ath5k_hw *ah = hw->priv; 197 struct ieee80211_conf *conf = &hw->conf; 198 int ret = 0; 199 int i; 200 201 mutex_lock(&ah->lock); 202 203 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { 204 ret = ath5k_chan_set(ah, conf->channel); 205 if (ret < 0) 206 goto unlock; 207 } 208 209 if ((changed & IEEE80211_CONF_CHANGE_POWER) && 210 (ah->power_level != conf->power_level)) { 211 ah->power_level = conf->power_level; 212 213 /* Half dB steps */ 214 ath5k_hw_set_txpower_limit(ah, (conf->power_level * 2)); 215 } 216 217 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) { 218 ah->ah_retry_long = conf->long_frame_max_tx_count; 219 ah->ah_retry_short = conf->short_frame_max_tx_count; 220 221 for (i = 0; i < ah->ah_capabilities.cap_queues.q_tx_num; i++) 222 ath5k_hw_set_tx_retry_limits(ah, i); 223 } 224 225 /* TODO: 226 * 1) Move this on config_interface and handle each case 227 * separately eg. when we have only one STA vif, use 228 * AR5K_ANTMODE_SINGLE_AP 229 * 230 * 2) Allow the user to change antenna mode eg. when only 231 * one antenna is present 232 * 233 * 3) Allow the user to set default/tx antenna when possible 234 * 235 * 4) Default mode should handle 90% of the cases, together 236 * with fixed a/b and single AP modes we should be able to 237 * handle 99%. Sectored modes are extreme cases and i still 238 * haven't found a usage for them. If we decide to support them, 239 * then we must allow the user to set how many tx antennas we 240 * have available 241 */ 242 ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode); 243 244 unlock: 245 mutex_unlock(&ah->lock); 246 return ret; 247 } 248 249 250 static void 251 ath5k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 252 struct ieee80211_bss_conf *bss_conf, u32 changes) 253 { 254 struct ath5k_vif *avf = (void *)vif->drv_priv; 255 struct ath5k_hw *ah = hw->priv; 256 struct ath_common *common = ath5k_hw_common(ah); 257 258 mutex_lock(&ah->lock); 259 260 if (changes & BSS_CHANGED_BSSID) { 261 /* Cache for later use during resets */ 262 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); 263 common->curaid = 0; 264 ath5k_hw_set_bssid(ah); 265 mmiowb(); 266 } 267 268 if (changes & BSS_CHANGED_BEACON_INT) 269 ah->bintval = bss_conf->beacon_int; 270 271 if (changes & BSS_CHANGED_ERP_SLOT) { 272 int slot_time; 273 274 ah->ah_short_slot = bss_conf->use_short_slot; 275 slot_time = ath5k_hw_get_default_slottime(ah) + 276 3 * ah->ah_coverage_class; 277 ath5k_hw_set_ifs_intervals(ah, slot_time); 278 } 279 280 if (changes & BSS_CHANGED_ASSOC) { 281 avf->assoc = bss_conf->assoc; 282 if (bss_conf->assoc) 283 ah->assoc = bss_conf->assoc; 284 else 285 ah->assoc = ath5k_any_vif_assoc(ah); 286 287 if (ah->opmode == NL80211_IFTYPE_STATION) 288 ath5k_set_beacon_filter(hw, ah->assoc); 289 ath5k_hw_set_ledstate(ah, ah->assoc ? 290 AR5K_LED_ASSOC : AR5K_LED_INIT); 291 if (bss_conf->assoc) { 292 ATH5K_DBG(ah, ATH5K_DEBUG_ANY, 293 "Bss Info ASSOC %d, bssid: %pM\n", 294 bss_conf->aid, common->curbssid); 295 common->curaid = bss_conf->aid; 296 ath5k_hw_set_bssid(ah); 297 /* Once ANI is available you would start it here */ 298 } 299 } 300 301 if (changes & BSS_CHANGED_BEACON) { 302 spin_lock_bh(&ah->block); 303 ath5k_beacon_update(hw, vif); 304 spin_unlock_bh(&ah->block); 305 } 306 307 if (changes & BSS_CHANGED_BEACON_ENABLED) 308 ah->enable_beacon = bss_conf->enable_beacon; 309 310 if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED | 311 BSS_CHANGED_BEACON_INT)) 312 ath5k_beacon_config(ah); 313 314 mutex_unlock(&ah->lock); 315 } 316 317 318 static u64 319 ath5k_prepare_multicast(struct ieee80211_hw *hw, 320 struct netdev_hw_addr_list *mc_list) 321 { 322 u32 mfilt[2], val; 323 u8 pos; 324 struct netdev_hw_addr *ha; 325 326 mfilt[0] = 0; 327 mfilt[1] = 1; 328 329 netdev_hw_addr_list_for_each(ha, mc_list) { 330 /* calculate XOR of eight 6-bit values */ 331 val = get_unaligned_le32(ha->addr + 0); 332 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 333 val = get_unaligned_le32(ha->addr + 3); 334 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 335 pos &= 0x3f; 336 mfilt[pos / 32] |= (1 << (pos % 32)); 337 /* XXX: we might be able to just do this instead, 338 * but not sure, needs testing, if we do use this we'd 339 * need to inform below not to reset the mcast */ 340 /* ath5k_hw_set_mcast_filterindex(ah, 341 * ha->addr[5]); */ 342 } 343 344 return ((u64)(mfilt[1]) << 32) | mfilt[0]; 345 } 346 347 348 /* 349 * o always accept unicast, broadcast, and multicast traffic 350 * o multicast traffic for all BSSIDs will be enabled if mac80211 351 * says it should be 352 * o maintain current state of phy ofdm or phy cck error reception. 353 * If the hardware detects any of these type of errors then 354 * ath5k_hw_get_rx_filter() will pass to us the respective 355 * hardware filters to be able to receive these type of frames. 356 * o probe request frames are accepted only when operating in 357 * hostap, adhoc, or monitor modes 358 * o enable promiscuous mode according to the interface state 359 * o accept beacons: 360 * - when operating in adhoc mode so the 802.11 layer creates 361 * node table entries for peers, 362 * - when operating in station mode for collecting rssi data when 363 * the station is otherwise quiet, or 364 * - when scanning 365 */ 366 static void 367 ath5k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, 368 unsigned int *new_flags, u64 multicast) 369 { 370 #define SUPPORTED_FIF_FLAGS \ 371 (FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | \ 372 FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \ 373 FIF_BCN_PRBRESP_PROMISC) 374 375 struct ath5k_hw *ah = hw->priv; 376 u32 mfilt[2], rfilt; 377 struct ath5k_vif_iter_data iter_data; /* to count STA interfaces */ 378 379 mutex_lock(&ah->lock); 380 381 mfilt[0] = multicast; 382 mfilt[1] = multicast >> 32; 383 384 /* Only deal with supported flags */ 385 changed_flags &= SUPPORTED_FIF_FLAGS; 386 *new_flags &= SUPPORTED_FIF_FLAGS; 387 388 /* If HW detects any phy or radar errors, leave those filters on. 389 * Also, always enable Unicast, Broadcasts and Multicast 390 * XXX: move unicast, bssid broadcasts and multicast to mac80211 */ 391 rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) | 392 (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST | 393 AR5K_RX_FILTER_MCAST); 394 395 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) { 396 if (*new_flags & FIF_PROMISC_IN_BSS) 397 __set_bit(ATH_STAT_PROMISC, ah->status); 398 else 399 __clear_bit(ATH_STAT_PROMISC, ah->status); 400 } 401 402 if (test_bit(ATH_STAT_PROMISC, ah->status)) 403 rfilt |= AR5K_RX_FILTER_PROM; 404 405 /* Note, AR5K_RX_FILTER_MCAST is already enabled */ 406 if (*new_flags & FIF_ALLMULTI) { 407 mfilt[0] = ~0; 408 mfilt[1] = ~0; 409 } 410 411 /* This is the best we can do */ 412 if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)) 413 rfilt |= AR5K_RX_FILTER_PHYERR; 414 415 /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons 416 * and probes for any BSSID */ 417 if ((*new_flags & FIF_BCN_PRBRESP_PROMISC) || (ah->nvifs > 1)) 418 rfilt |= AR5K_RX_FILTER_BEACON; 419 420 /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not 421 * set we should only pass on control frames for this 422 * station. This needs testing. I believe right now this 423 * enables *all* control frames, which is OK.. but 424 * but we should see if we can improve on granularity */ 425 if (*new_flags & FIF_CONTROL) 426 rfilt |= AR5K_RX_FILTER_CONTROL; 427 428 /* Additional settings per mode -- this is per ath5k */ 429 430 /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */ 431 432 switch (ah->opmode) { 433 case NL80211_IFTYPE_MESH_POINT: 434 rfilt |= AR5K_RX_FILTER_CONTROL | 435 AR5K_RX_FILTER_BEACON | 436 AR5K_RX_FILTER_PROBEREQ | 437 AR5K_RX_FILTER_PROM; 438 break; 439 case NL80211_IFTYPE_AP: 440 case NL80211_IFTYPE_ADHOC: 441 rfilt |= AR5K_RX_FILTER_PROBEREQ | 442 AR5K_RX_FILTER_BEACON; 443 break; 444 case NL80211_IFTYPE_STATION: 445 if (ah->assoc) 446 rfilt |= AR5K_RX_FILTER_BEACON; 447 default: 448 break; 449 } 450 451 iter_data.hw_macaddr = NULL; 452 iter_data.n_stas = 0; 453 iter_data.need_set_hw_addr = false; 454 ieee80211_iterate_active_interfaces_atomic(ah->hw, ath5k_vif_iter, 455 &iter_data); 456 457 /* Set up RX Filter */ 458 if (iter_data.n_stas > 1) { 459 /* If you have multiple STA interfaces connected to 460 * different APs, ARPs are not received (most of the time?) 461 * Enabling PROMISC appears to fix that problem. 462 */ 463 rfilt |= AR5K_RX_FILTER_PROM; 464 } 465 466 /* Set filters */ 467 ath5k_hw_set_rx_filter(ah, rfilt); 468 469 /* Set multicast bits */ 470 ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]); 471 /* Set the cached hw filter flags, this will later actually 472 * be set in HW */ 473 ah->filter_flags = rfilt; 474 475 mutex_unlock(&ah->lock); 476 } 477 478 479 static int 480 ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 481 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 482 struct ieee80211_key_conf *key) 483 { 484 struct ath5k_hw *ah = hw->priv; 485 struct ath_common *common = ath5k_hw_common(ah); 486 int ret = 0; 487 488 if (ath5k_modparam_nohwcrypt) 489 return -EOPNOTSUPP; 490 491 if (vif->type == NL80211_IFTYPE_ADHOC && 492 (key->cipher == WLAN_CIPHER_SUITE_TKIP || 493 key->cipher == WLAN_CIPHER_SUITE_CCMP) && 494 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 495 /* don't program group keys when using IBSS_RSN */ 496 return -EOPNOTSUPP; 497 } 498 499 switch (key->cipher) { 500 case WLAN_CIPHER_SUITE_WEP40: 501 case WLAN_CIPHER_SUITE_WEP104: 502 case WLAN_CIPHER_SUITE_TKIP: 503 break; 504 case WLAN_CIPHER_SUITE_CCMP: 505 if (common->crypt_caps & ATH_CRYPT_CAP_CIPHER_AESCCM) 506 break; 507 return -EOPNOTSUPP; 508 default: 509 WARN_ON(1); 510 return -EINVAL; 511 } 512 513 mutex_lock(&ah->lock); 514 515 switch (cmd) { 516 case SET_KEY: 517 ret = ath_key_config(common, vif, sta, key); 518 if (ret >= 0) { 519 key->hw_key_idx = ret; 520 /* push IV and Michael MIC generation to stack */ 521 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 522 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) 523 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 524 if (key->cipher == WLAN_CIPHER_SUITE_CCMP) 525 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT; 526 ret = 0; 527 } 528 break; 529 case DISABLE_KEY: 530 ath_key_delete(common, key); 531 break; 532 default: 533 ret = -EINVAL; 534 } 535 536 mmiowb(); 537 mutex_unlock(&ah->lock); 538 return ret; 539 } 540 541 542 static void 543 ath5k_sw_scan_start(struct ieee80211_hw *hw) 544 { 545 struct ath5k_hw *ah = hw->priv; 546 if (!ah->assoc) 547 ath5k_hw_set_ledstate(ah, AR5K_LED_SCAN); 548 } 549 550 551 static void 552 ath5k_sw_scan_complete(struct ieee80211_hw *hw) 553 { 554 struct ath5k_hw *ah = hw->priv; 555 ath5k_hw_set_ledstate(ah, ah->assoc ? 556 AR5K_LED_ASSOC : AR5K_LED_INIT); 557 } 558 559 560 static int 561 ath5k_get_stats(struct ieee80211_hw *hw, 562 struct ieee80211_low_level_stats *stats) 563 { 564 struct ath5k_hw *ah = hw->priv; 565 566 /* Force update */ 567 ath5k_hw_update_mib_counters(ah); 568 569 stats->dot11ACKFailureCount = ah->stats.ack_fail; 570 stats->dot11RTSFailureCount = ah->stats.rts_fail; 571 stats->dot11RTSSuccessCount = ah->stats.rts_ok; 572 stats->dot11FCSErrorCount = ah->stats.fcs_error; 573 574 return 0; 575 } 576 577 578 static int 579 ath5k_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue, 580 const struct ieee80211_tx_queue_params *params) 581 { 582 struct ath5k_hw *ah = hw->priv; 583 struct ath5k_txq_info qi; 584 int ret = 0; 585 586 if (queue >= ah->ah_capabilities.cap_queues.q_tx_num) 587 return 0; 588 589 mutex_lock(&ah->lock); 590 591 ath5k_hw_get_tx_queueprops(ah, queue, &qi); 592 593 qi.tqi_aifs = params->aifs; 594 qi.tqi_cw_min = params->cw_min; 595 qi.tqi_cw_max = params->cw_max; 596 qi.tqi_burst_time = params->txop * 32; 597 598 ATH5K_DBG(ah, ATH5K_DEBUG_ANY, 599 "Configure tx [queue %d], " 600 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n", 601 queue, params->aifs, params->cw_min, 602 params->cw_max, params->txop); 603 604 if (ath5k_hw_set_tx_queueprops(ah, queue, &qi)) { 605 ATH5K_ERR(ah, 606 "Unable to update hardware queue %u!\n", queue); 607 ret = -EIO; 608 } else 609 ath5k_hw_reset_tx_queue(ah, queue); 610 611 mutex_unlock(&ah->lock); 612 613 return ret; 614 } 615 616 617 static u64 618 ath5k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 619 { 620 struct ath5k_hw *ah = hw->priv; 621 622 return ath5k_hw_get_tsf64(ah); 623 } 624 625 626 static void 627 ath5k_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u64 tsf) 628 { 629 struct ath5k_hw *ah = hw->priv; 630 631 ath5k_hw_set_tsf64(ah, tsf); 632 } 633 634 635 static void 636 ath5k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 637 { 638 struct ath5k_hw *ah = hw->priv; 639 640 /* 641 * in IBSS mode we need to update the beacon timers too. 642 * this will also reset the TSF if we call it with 0 643 */ 644 if (ah->opmode == NL80211_IFTYPE_ADHOC) 645 ath5k_beacon_update_timers(ah, 0); 646 else 647 ath5k_hw_reset_tsf(ah); 648 } 649 650 651 static int 652 ath5k_get_survey(struct ieee80211_hw *hw, int idx, struct survey_info *survey) 653 { 654 struct ath5k_hw *ah = hw->priv; 655 struct ieee80211_conf *conf = &hw->conf; 656 struct ath_common *common = ath5k_hw_common(ah); 657 struct ath_cycle_counters *cc = &common->cc_survey; 658 unsigned int div = common->clockrate * 1000; 659 660 if (idx != 0) 661 return -ENOENT; 662 663 spin_lock_bh(&common->cc_lock); 664 ath_hw_cycle_counters_update(common); 665 if (cc->cycles > 0) { 666 ah->survey.channel_time += cc->cycles / div; 667 ah->survey.channel_time_busy += cc->rx_busy / div; 668 ah->survey.channel_time_rx += cc->rx_frame / div; 669 ah->survey.channel_time_tx += cc->tx_frame / div; 670 } 671 memset(cc, 0, sizeof(*cc)); 672 spin_unlock_bh(&common->cc_lock); 673 674 memcpy(survey, &ah->survey, sizeof(*survey)); 675 676 survey->channel = conf->channel; 677 survey->noise = ah->ah_noise_floor; 678 survey->filled = SURVEY_INFO_NOISE_DBM | 679 SURVEY_INFO_CHANNEL_TIME | 680 SURVEY_INFO_CHANNEL_TIME_BUSY | 681 SURVEY_INFO_CHANNEL_TIME_RX | 682 SURVEY_INFO_CHANNEL_TIME_TX; 683 684 return 0; 685 } 686 687 688 /** 689 * ath5k_set_coverage_class - Set IEEE 802.11 coverage class 690 * 691 * @hw: struct ieee80211_hw pointer 692 * @coverage_class: IEEE 802.11 coverage class number 693 * 694 * Mac80211 callback. Sets slot time, ACK timeout and CTS timeout for given 695 * coverage class. The values are persistent, they are restored after device 696 * reset. 697 */ 698 static void 699 ath5k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class) 700 { 701 struct ath5k_hw *ah = hw->priv; 702 703 mutex_lock(&ah->lock); 704 ath5k_hw_set_coverage_class(ah, coverage_class); 705 mutex_unlock(&ah->lock); 706 } 707 708 709 static int 710 ath5k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) 711 { 712 struct ath5k_hw *ah = hw->priv; 713 714 if (tx_ant == 1 && rx_ant == 1) 715 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_A); 716 else if (tx_ant == 2 && rx_ant == 2) 717 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_B); 718 else if ((tx_ant & 3) == 3 && (rx_ant & 3) == 3) 719 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_DEFAULT); 720 else 721 return -EINVAL; 722 return 0; 723 } 724 725 726 static int 727 ath5k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) 728 { 729 struct ath5k_hw *ah = hw->priv; 730 731 switch (ah->ah_ant_mode) { 732 case AR5K_ANTMODE_FIXED_A: 733 *tx_ant = 1; *rx_ant = 1; break; 734 case AR5K_ANTMODE_FIXED_B: 735 *tx_ant = 2; *rx_ant = 2; break; 736 case AR5K_ANTMODE_DEFAULT: 737 *tx_ant = 3; *rx_ant = 3; break; 738 } 739 return 0; 740 } 741 742 743 static void ath5k_get_ringparam(struct ieee80211_hw *hw, 744 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) 745 { 746 struct ath5k_hw *ah = hw->priv; 747 748 *tx = ah->txqs[AR5K_TX_QUEUE_ID_DATA_MIN].txq_max; 749 750 *tx_max = ATH5K_TXQ_LEN_MAX; 751 *rx = *rx_max = ATH_RXBUF; 752 } 753 754 755 static int ath5k_set_ringparam(struct ieee80211_hw *hw, u32 tx, u32 rx) 756 { 757 struct ath5k_hw *ah = hw->priv; 758 u16 qnum; 759 760 /* only support setting tx ring size for now */ 761 if (rx != ATH_RXBUF) 762 return -EINVAL; 763 764 /* restrict tx ring size min/max */ 765 if (!tx || tx > ATH5K_TXQ_LEN_MAX) 766 return -EINVAL; 767 768 for (qnum = 0; qnum < ARRAY_SIZE(ah->txqs); qnum++) { 769 if (!ah->txqs[qnum].setup) 770 continue; 771 if (ah->txqs[qnum].qnum < AR5K_TX_QUEUE_ID_DATA_MIN || 772 ah->txqs[qnum].qnum > AR5K_TX_QUEUE_ID_DATA_MAX) 773 continue; 774 775 ah->txqs[qnum].txq_max = tx; 776 if (ah->txqs[qnum].txq_len >= ah->txqs[qnum].txq_max) 777 ieee80211_stop_queue(hw, ah->txqs[qnum].qnum); 778 } 779 780 return 0; 781 } 782 783 784 const struct ieee80211_ops ath5k_hw_ops = { 785 .tx = ath5k_tx, 786 .start = ath5k_start, 787 .stop = ath5k_stop, 788 .add_interface = ath5k_add_interface, 789 /* .change_interface = not implemented */ 790 .remove_interface = ath5k_remove_interface, 791 .config = ath5k_config, 792 .bss_info_changed = ath5k_bss_info_changed, 793 .prepare_multicast = ath5k_prepare_multicast, 794 .configure_filter = ath5k_configure_filter, 795 /* .set_tim = not implemented */ 796 .set_key = ath5k_set_key, 797 /* .update_tkip_key = not implemented */ 798 /* .hw_scan = not implemented */ 799 .sw_scan_start = ath5k_sw_scan_start, 800 .sw_scan_complete = ath5k_sw_scan_complete, 801 .get_stats = ath5k_get_stats, 802 /* .get_tkip_seq = not implemented */ 803 /* .set_frag_threshold = not implemented */ 804 /* .set_rts_threshold = not implemented */ 805 /* .sta_add = not implemented */ 806 /* .sta_remove = not implemented */ 807 /* .sta_notify = not implemented */ 808 .conf_tx = ath5k_conf_tx, 809 .get_tsf = ath5k_get_tsf, 810 .set_tsf = ath5k_set_tsf, 811 .reset_tsf = ath5k_reset_tsf, 812 /* .tx_last_beacon = not implemented */ 813 /* .ampdu_action = not needed */ 814 .get_survey = ath5k_get_survey, 815 .set_coverage_class = ath5k_set_coverage_class, 816 /* .rfkill_poll = not implemented */ 817 /* .flush = not implemented */ 818 /* .channel_switch = not implemented */ 819 /* .napi_poll = not implemented */ 820 .set_antenna = ath5k_set_antenna, 821 .get_antenna = ath5k_get_antenna, 822 .set_ringparam = ath5k_set_ringparam, 823 .get_ringparam = ath5k_get_ringparam, 824 }; 825