1 /* 2 * mac80211 glue code for mac80211 Prism54 drivers 3 * 4 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net> 5 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de> 6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 7 * 8 * Based on: 9 * - the islsm (softmac prism54) driver, which is: 10 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al. 11 * - stlc45xx driver 12 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 */ 18 19 #include <linux/slab.h> 20 #include <linux/firmware.h> 21 #include <linux/etherdevice.h> 22 #include <linux/module.h> 23 24 #include <net/mac80211.h> 25 26 #include "p54.h" 27 #include "lmac.h" 28 29 static bool modparam_nohwcrypt; 30 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444); 31 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); 32 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>"); 33 MODULE_DESCRIPTION("Softmac Prism54 common code"); 34 MODULE_LICENSE("GPL"); 35 MODULE_ALIAS("prism54common"); 36 37 static int p54_sta_add_remove(struct ieee80211_hw *hw, 38 struct ieee80211_vif *vif, 39 struct ieee80211_sta *sta) 40 { 41 struct p54_common *priv = hw->priv; 42 43 /* 44 * Notify the firmware that we don't want or we don't 45 * need to buffer frames for this station anymore. 46 */ 47 48 p54_sta_unlock(priv, sta->addr); 49 50 return 0; 51 } 52 53 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif, 54 enum sta_notify_cmd notify_cmd, 55 struct ieee80211_sta *sta) 56 { 57 struct p54_common *priv = dev->priv; 58 59 switch (notify_cmd) { 60 case STA_NOTIFY_AWAKE: 61 /* update the firmware's filter table */ 62 p54_sta_unlock(priv, sta->addr); 63 break; 64 default: 65 break; 66 } 67 } 68 69 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta, 70 bool set) 71 { 72 struct p54_common *priv = dev->priv; 73 74 return p54_update_beacon_tim(priv, sta->aid, set); 75 } 76 77 u8 *p54_find_ie(struct sk_buff *skb, u8 ie) 78 { 79 struct ieee80211_mgmt *mgmt = (void *)skb->data; 80 u8 *pos, *end; 81 82 if (skb->len <= sizeof(mgmt)) 83 return NULL; 84 85 pos = (u8 *)mgmt->u.beacon.variable; 86 end = skb->data + skb->len; 87 while (pos < end) { 88 if (pos + 2 + pos[1] > end) 89 return NULL; 90 91 if (pos[0] == ie) 92 return pos; 93 94 pos += 2 + pos[1]; 95 } 96 return NULL; 97 } 98 99 static int p54_beacon_format_ie_tim(struct sk_buff *skb) 100 { 101 /* 102 * the good excuse for this mess is ... the firmware. 103 * The dummy TIM MUST be at the end of the beacon frame, 104 * because it'll be overwritten! 105 */ 106 u8 *tim; 107 u8 dtim_len; 108 u8 dtim_period; 109 u8 *next; 110 111 tim = p54_find_ie(skb, WLAN_EID_TIM); 112 if (!tim) 113 return 0; 114 115 dtim_len = tim[1]; 116 dtim_period = tim[3]; 117 next = tim + 2 + dtim_len; 118 119 if (dtim_len < 3) 120 return -EINVAL; 121 122 memmove(tim, next, skb_tail_pointer(skb) - next); 123 tim = skb_tail_pointer(skb) - (dtim_len + 2); 124 125 /* add the dummy at the end */ 126 tim[0] = WLAN_EID_TIM; 127 tim[1] = 3; 128 tim[2] = 0; 129 tim[3] = dtim_period; 130 tim[4] = 0; 131 132 if (dtim_len > 3) 133 skb_trim(skb, skb->len - (dtim_len - 3)); 134 135 return 0; 136 } 137 138 static int p54_beacon_update(struct p54_common *priv, 139 struct ieee80211_vif *vif) 140 { 141 struct ieee80211_tx_control control = { }; 142 struct sk_buff *beacon; 143 int ret; 144 145 beacon = ieee80211_beacon_get(priv->hw, vif); 146 if (!beacon) 147 return -ENOMEM; 148 ret = p54_beacon_format_ie_tim(beacon); 149 if (ret) 150 return ret; 151 152 /* 153 * During operation, the firmware takes care of beaconing. 154 * The driver only needs to upload a new beacon template, once 155 * the template was changed by the stack or userspace. 156 * 157 * LMAC API 3.2.2 also specifies that the driver does not need 158 * to cancel the old beacon template by hand, instead the firmware 159 * will release the previous one through the feedback mechanism. 160 */ 161 p54_tx_80211(priv->hw, &control, beacon); 162 priv->tsf_high32 = 0; 163 priv->tsf_low32 = 0; 164 165 return 0; 166 } 167 168 static int p54_start(struct ieee80211_hw *dev) 169 { 170 struct p54_common *priv = dev->priv; 171 int err; 172 173 mutex_lock(&priv->conf_mutex); 174 err = priv->open(dev); 175 if (err) 176 goto out; 177 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47); 178 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94); 179 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0); 180 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0); 181 err = p54_set_edcf(priv); 182 if (err) 183 goto out; 184 185 eth_broadcast_addr(priv->bssid); 186 priv->mode = NL80211_IFTYPE_MONITOR; 187 err = p54_setup_mac(priv); 188 if (err) { 189 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 190 goto out; 191 } 192 193 ieee80211_queue_delayed_work(dev, &priv->work, 0); 194 195 priv->softled_state = 0; 196 err = p54_set_leds(priv); 197 198 out: 199 mutex_unlock(&priv->conf_mutex); 200 return err; 201 } 202 203 static void p54_stop(struct ieee80211_hw *dev) 204 { 205 struct p54_common *priv = dev->priv; 206 int i; 207 208 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 209 priv->softled_state = 0; 210 cancel_delayed_work_sync(&priv->work); 211 mutex_lock(&priv->conf_mutex); 212 p54_set_leds(priv); 213 priv->stop(dev); 214 skb_queue_purge(&priv->tx_pending); 215 skb_queue_purge(&priv->tx_queue); 216 for (i = 0; i < P54_QUEUE_NUM; i++) { 217 priv->tx_stats[i].count = 0; 218 priv->tx_stats[i].len = 0; 219 } 220 221 priv->beacon_req_id = cpu_to_le32(0); 222 priv->tsf_high32 = priv->tsf_low32 = 0; 223 mutex_unlock(&priv->conf_mutex); 224 } 225 226 static int p54_add_interface(struct ieee80211_hw *dev, 227 struct ieee80211_vif *vif) 228 { 229 struct p54_common *priv = dev->priv; 230 int err; 231 232 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER; 233 234 mutex_lock(&priv->conf_mutex); 235 if (priv->mode != NL80211_IFTYPE_MONITOR) { 236 mutex_unlock(&priv->conf_mutex); 237 return -EOPNOTSUPP; 238 } 239 240 priv->vif = vif; 241 242 switch (vif->type) { 243 case NL80211_IFTYPE_STATION: 244 case NL80211_IFTYPE_ADHOC: 245 case NL80211_IFTYPE_AP: 246 case NL80211_IFTYPE_MESH_POINT: 247 priv->mode = vif->type; 248 break; 249 default: 250 mutex_unlock(&priv->conf_mutex); 251 return -EOPNOTSUPP; 252 } 253 254 memcpy(priv->mac_addr, vif->addr, ETH_ALEN); 255 err = p54_setup_mac(priv); 256 mutex_unlock(&priv->conf_mutex); 257 return err; 258 } 259 260 static void p54_remove_interface(struct ieee80211_hw *dev, 261 struct ieee80211_vif *vif) 262 { 263 struct p54_common *priv = dev->priv; 264 265 mutex_lock(&priv->conf_mutex); 266 priv->vif = NULL; 267 268 /* 269 * LMAC API 3.2.2 states that any active beacon template must be 270 * canceled by the driver before attempting a mode transition. 271 */ 272 if (le32_to_cpu(priv->beacon_req_id) != 0) { 273 p54_tx_cancel(priv, priv->beacon_req_id); 274 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ); 275 } 276 priv->mode = NL80211_IFTYPE_MONITOR; 277 eth_zero_addr(priv->mac_addr); 278 eth_zero_addr(priv->bssid); 279 p54_setup_mac(priv); 280 mutex_unlock(&priv->conf_mutex); 281 } 282 283 static int p54_wait_for_stats(struct ieee80211_hw *dev) 284 { 285 struct p54_common *priv = dev->priv; 286 int ret; 287 288 priv->update_stats = true; 289 ret = p54_fetch_statistics(priv); 290 if (ret) 291 return ret; 292 293 ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ); 294 if (ret == 0) 295 return -ETIMEDOUT; 296 297 return 0; 298 } 299 300 static void p54_reset_stats(struct p54_common *priv) 301 { 302 struct ieee80211_channel *chan = priv->curchan; 303 304 if (chan) { 305 struct survey_info *info = &priv->survey[chan->hw_value]; 306 307 /* only reset channel statistics, don't touch .filled, etc. */ 308 info->time = 0; 309 info->time_busy = 0; 310 info->time_tx = 0; 311 } 312 313 priv->update_stats = true; 314 priv->survey_raw.active = 0; 315 priv->survey_raw.cca = 0; 316 priv->survey_raw.tx = 0; 317 } 318 319 static int p54_config(struct ieee80211_hw *dev, u32 changed) 320 { 321 int ret = 0; 322 struct p54_common *priv = dev->priv; 323 struct ieee80211_conf *conf = &dev->conf; 324 325 mutex_lock(&priv->conf_mutex); 326 if (changed & IEEE80211_CONF_CHANGE_POWER) 327 priv->output_power = conf->power_level << 2; 328 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { 329 struct ieee80211_channel *oldchan; 330 WARN_ON(p54_wait_for_stats(dev)); 331 oldchan = priv->curchan; 332 priv->curchan = NULL; 333 ret = p54_scan(priv, P54_SCAN_EXIT, 0); 334 if (ret) { 335 priv->curchan = oldchan; 336 goto out; 337 } 338 /* 339 * TODO: Use the LM_SCAN_TRAP to determine the current 340 * operating channel. 341 */ 342 priv->curchan = priv->hw->conf.chandef.chan; 343 p54_reset_stats(priv); 344 WARN_ON(p54_fetch_statistics(priv)); 345 } 346 if (changed & IEEE80211_CONF_CHANGE_PS) { 347 WARN_ON(p54_wait_for_stats(dev)); 348 ret = p54_set_ps(priv); 349 if (ret) 350 goto out; 351 WARN_ON(p54_wait_for_stats(dev)); 352 } 353 if (changed & IEEE80211_CONF_CHANGE_IDLE) { 354 WARN_ON(p54_wait_for_stats(dev)); 355 ret = p54_setup_mac(priv); 356 if (ret) 357 goto out; 358 WARN_ON(p54_wait_for_stats(dev)); 359 } 360 361 out: 362 mutex_unlock(&priv->conf_mutex); 363 return ret; 364 } 365 366 static u64 p54_prepare_multicast(struct ieee80211_hw *dev, 367 struct netdev_hw_addr_list *mc_list) 368 { 369 struct p54_common *priv = dev->priv; 370 struct netdev_hw_addr *ha; 371 int i; 372 373 BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) != 374 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list)); 375 /* 376 * The first entry is reserved for the global broadcast MAC. 377 * Otherwise the firmware will drop it and ARP will no longer work. 378 */ 379 i = 1; 380 priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i; 381 netdev_hw_addr_list_for_each(ha, mc_list) { 382 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN); 383 i++; 384 if (i >= ARRAY_SIZE(priv->mc_maclist)) 385 break; 386 } 387 388 return 1; /* update */ 389 } 390 391 static void p54_configure_filter(struct ieee80211_hw *dev, 392 unsigned int changed_flags, 393 unsigned int *total_flags, 394 u64 multicast) 395 { 396 struct p54_common *priv = dev->priv; 397 398 *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS; 399 400 priv->filter_flags = *total_flags; 401 402 if (changed_flags & FIF_OTHER_BSS) 403 p54_setup_mac(priv); 404 405 if (changed_flags & FIF_ALLMULTI || multicast) 406 p54_set_groupfilter(priv); 407 } 408 409 static int p54_conf_tx(struct ieee80211_hw *dev, 410 struct ieee80211_vif *vif, u16 queue, 411 const struct ieee80211_tx_queue_params *params) 412 { 413 struct p54_common *priv = dev->priv; 414 int ret; 415 416 mutex_lock(&priv->conf_mutex); 417 if (queue < dev->queues) { 418 P54_SET_QUEUE(priv->qos_params[queue], params->aifs, 419 params->cw_min, params->cw_max, params->txop); 420 ret = p54_set_edcf(priv); 421 } else 422 ret = -EINVAL; 423 mutex_unlock(&priv->conf_mutex); 424 return ret; 425 } 426 427 static void p54_work(struct work_struct *work) 428 { 429 struct p54_common *priv = container_of(work, struct p54_common, 430 work.work); 431 432 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) 433 return ; 434 435 /* 436 * TODO: walk through tx_queue and do the following tasks 437 * 1. initiate bursts. 438 * 2. cancel stuck frames / reset the device if necessary. 439 */ 440 441 mutex_lock(&priv->conf_mutex); 442 WARN_ON_ONCE(p54_fetch_statistics(priv)); 443 mutex_unlock(&priv->conf_mutex); 444 } 445 446 static int p54_get_stats(struct ieee80211_hw *dev, 447 struct ieee80211_low_level_stats *stats) 448 { 449 struct p54_common *priv = dev->priv; 450 451 memcpy(stats, &priv->stats, sizeof(*stats)); 452 return 0; 453 } 454 455 static void p54_bss_info_changed(struct ieee80211_hw *dev, 456 struct ieee80211_vif *vif, 457 struct ieee80211_bss_conf *info, 458 u32 changed) 459 { 460 struct p54_common *priv = dev->priv; 461 462 mutex_lock(&priv->conf_mutex); 463 if (changed & BSS_CHANGED_BSSID) { 464 memcpy(priv->bssid, info->bssid, ETH_ALEN); 465 p54_setup_mac(priv); 466 } 467 468 if (changed & BSS_CHANGED_BEACON) { 469 p54_scan(priv, P54_SCAN_EXIT, 0); 470 p54_setup_mac(priv); 471 p54_beacon_update(priv, vif); 472 p54_set_edcf(priv); 473 } 474 475 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) { 476 priv->use_short_slot = info->use_short_slot; 477 p54_set_edcf(priv); 478 } 479 if (changed & BSS_CHANGED_BASIC_RATES) { 480 if (dev->conf.chandef.chan->band == NL80211_BAND_5GHZ) 481 priv->basic_rate_mask = (info->basic_rates << 4); 482 else 483 priv->basic_rate_mask = info->basic_rates; 484 p54_setup_mac(priv); 485 if (priv->fw_var >= 0x500) 486 p54_scan(priv, P54_SCAN_EXIT, 0); 487 } 488 if (changed & BSS_CHANGED_ASSOC) { 489 if (info->assoc) { 490 priv->aid = info->aid; 491 priv->wakeup_timer = info->beacon_int * 492 info->dtim_period * 5; 493 p54_setup_mac(priv); 494 } else { 495 priv->wakeup_timer = 500; 496 priv->aid = 0; 497 } 498 } 499 500 mutex_unlock(&priv->conf_mutex); 501 } 502 503 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd, 504 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 505 struct ieee80211_key_conf *key) 506 { 507 struct p54_common *priv = dev->priv; 508 int slot, ret = 0; 509 u8 algo = 0; 510 u8 *addr = NULL; 511 512 if (modparam_nohwcrypt) 513 return -EOPNOTSUPP; 514 515 if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) { 516 /* 517 * Unfortunately most/all firmwares are trying to decrypt 518 * incoming management frames if a suitable key can be found. 519 * However, in doing so the data in these frames gets 520 * corrupted. So, we can't have firmware supported crypto 521 * offload in this case. 522 */ 523 return -EOPNOTSUPP; 524 } 525 526 mutex_lock(&priv->conf_mutex); 527 if (cmd == SET_KEY) { 528 switch (key->cipher) { 529 case WLAN_CIPHER_SUITE_TKIP: 530 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL | 531 BR_DESC_PRIV_CAP_TKIP))) { 532 ret = -EOPNOTSUPP; 533 goto out_unlock; 534 } 535 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 536 algo = P54_CRYPTO_TKIPMICHAEL; 537 break; 538 case WLAN_CIPHER_SUITE_WEP40: 539 case WLAN_CIPHER_SUITE_WEP104: 540 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) { 541 ret = -EOPNOTSUPP; 542 goto out_unlock; 543 } 544 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 545 algo = P54_CRYPTO_WEP; 546 break; 547 case WLAN_CIPHER_SUITE_CCMP: 548 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) { 549 ret = -EOPNOTSUPP; 550 goto out_unlock; 551 } 552 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 553 algo = P54_CRYPTO_AESCCMP; 554 break; 555 default: 556 ret = -EOPNOTSUPP; 557 goto out_unlock; 558 } 559 slot = bitmap_find_free_region(priv->used_rxkeys, 560 priv->rx_keycache_size, 0); 561 562 if (slot < 0) { 563 /* 564 * The device supports the chosen algorithm, but the 565 * firmware does not provide enough key slots to store 566 * all of them. 567 * But encryption offload for outgoing frames is always 568 * possible, so we just pretend that the upload was 569 * successful and do the decryption in software. 570 */ 571 572 /* mark the key as invalid. */ 573 key->hw_key_idx = 0xff; 574 goto out_unlock; 575 } 576 577 key->flags |= IEEE80211_KEY_FLAG_RESERVE_TAILROOM; 578 } else { 579 slot = key->hw_key_idx; 580 581 if (slot == 0xff) { 582 /* This key was not uploaded into the rx key cache. */ 583 584 goto out_unlock; 585 } 586 587 bitmap_release_region(priv->used_rxkeys, slot, 0); 588 algo = 0; 589 } 590 591 if (sta) 592 addr = sta->addr; 593 594 ret = p54_upload_key(priv, algo, slot, key->keyidx, 595 key->keylen, addr, key->key); 596 if (ret) { 597 bitmap_release_region(priv->used_rxkeys, slot, 0); 598 ret = -EOPNOTSUPP; 599 goto out_unlock; 600 } 601 602 key->hw_key_idx = slot; 603 604 out_unlock: 605 mutex_unlock(&priv->conf_mutex); 606 return ret; 607 } 608 609 static int p54_get_survey(struct ieee80211_hw *dev, int idx, 610 struct survey_info *survey) 611 { 612 struct p54_common *priv = dev->priv; 613 struct ieee80211_channel *chan; 614 int err, tries; 615 bool in_use = false; 616 617 if (idx >= priv->chan_num) 618 return -ENOENT; 619 620 #define MAX_TRIES 1 621 for (tries = 0; tries < MAX_TRIES; tries++) { 622 chan = priv->curchan; 623 if (chan && chan->hw_value == idx) { 624 mutex_lock(&priv->conf_mutex); 625 err = p54_wait_for_stats(dev); 626 mutex_unlock(&priv->conf_mutex); 627 if (err) 628 return err; 629 630 in_use = true; 631 } 632 633 memcpy(survey, &priv->survey[idx], sizeof(*survey)); 634 635 if (in_use) { 636 /* test if the reported statistics are valid. */ 637 if (survey->time != 0) { 638 survey->filled |= SURVEY_INFO_IN_USE; 639 } else { 640 /* 641 * hw/fw has not accumulated enough sample sets. 642 * Wait for 100ms, this ought to be enough to 643 * to get at least one non-null set of channel 644 * usage statistics. 645 */ 646 msleep(100); 647 continue; 648 } 649 } 650 return 0; 651 } 652 return -ETIMEDOUT; 653 #undef MAX_TRIES 654 } 655 656 static unsigned int p54_flush_count(struct p54_common *priv) 657 { 658 unsigned int total = 0, i; 659 660 BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats)); 661 662 /* 663 * Because the firmware has the sole control over any frames 664 * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they 665 * don't really count as pending or active. 666 */ 667 for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++) 668 total += priv->tx_stats[i].len; 669 return total; 670 } 671 672 static void p54_flush(struct ieee80211_hw *dev, struct ieee80211_vif *vif, 673 u32 queues, bool drop) 674 { 675 struct p54_common *priv = dev->priv; 676 unsigned int total, i; 677 678 /* 679 * Currently, it wouldn't really matter if we wait for one second 680 * or 15 minutes. But once someone gets around and completes the 681 * TODOs [ancel stuck frames / reset device] in p54_work, it will 682 * suddenly make sense to wait that long. 683 */ 684 i = P54_STATISTICS_UPDATE * 2 / 20; 685 686 /* 687 * In this case no locking is required because as we speak the 688 * queues have already been stopped and no new frames can sneak 689 * up from behind. 690 */ 691 while ((total = p54_flush_count(priv) && i--)) { 692 /* waste time */ 693 msleep(20); 694 } 695 696 WARN(total, "tx flush timeout, unresponsive firmware"); 697 } 698 699 static void p54_set_coverage_class(struct ieee80211_hw *dev, 700 s16 coverage_class) 701 { 702 struct p54_common *priv = dev->priv; 703 704 mutex_lock(&priv->conf_mutex); 705 /* support all coverage class values as in 802.11-2007 Table 7-27 */ 706 priv->coverage_class = clamp_t(u8, coverage_class, 0, 31); 707 p54_set_edcf(priv); 708 mutex_unlock(&priv->conf_mutex); 709 } 710 711 static const struct ieee80211_ops p54_ops = { 712 .tx = p54_tx_80211, 713 .start = p54_start, 714 .stop = p54_stop, 715 .add_interface = p54_add_interface, 716 .remove_interface = p54_remove_interface, 717 .set_tim = p54_set_tim, 718 .sta_notify = p54_sta_notify, 719 .sta_add = p54_sta_add_remove, 720 .sta_remove = p54_sta_add_remove, 721 .set_key = p54_set_key, 722 .config = p54_config, 723 .flush = p54_flush, 724 .bss_info_changed = p54_bss_info_changed, 725 .prepare_multicast = p54_prepare_multicast, 726 .configure_filter = p54_configure_filter, 727 .conf_tx = p54_conf_tx, 728 .get_stats = p54_get_stats, 729 .get_survey = p54_get_survey, 730 .set_coverage_class = p54_set_coverage_class, 731 }; 732 733 struct ieee80211_hw *p54_init_common(size_t priv_data_len) 734 { 735 struct ieee80211_hw *dev; 736 struct p54_common *priv; 737 738 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops); 739 if (!dev) 740 return NULL; 741 742 priv = dev->priv; 743 priv->hw = dev; 744 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 745 priv->basic_rate_mask = 0x15f; 746 spin_lock_init(&priv->tx_stats_lock); 747 skb_queue_head_init(&priv->tx_queue); 748 skb_queue_head_init(&priv->tx_pending); 749 ieee80211_hw_set(dev, REPORTS_TX_ACK_STATUS); 750 ieee80211_hw_set(dev, MFP_CAPABLE); 751 ieee80211_hw_set(dev, PS_NULLFUNC_STACK); 752 ieee80211_hw_set(dev, SUPPORTS_PS); 753 ieee80211_hw_set(dev, RX_INCLUDES_FCS); 754 ieee80211_hw_set(dev, SIGNAL_DBM); 755 756 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | 757 BIT(NL80211_IFTYPE_ADHOC) | 758 BIT(NL80211_IFTYPE_AP) | 759 BIT(NL80211_IFTYPE_MESH_POINT); 760 761 priv->beacon_req_id = cpu_to_le32(0); 762 priv->tx_stats[P54_QUEUE_BEACON].limit = 1; 763 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1; 764 priv->tx_stats[P54_QUEUE_MGMT].limit = 3; 765 priv->tx_stats[P54_QUEUE_CAB].limit = 3; 766 priv->tx_stats[P54_QUEUE_DATA].limit = 5; 767 dev->queues = 1; 768 priv->noise = -94; 769 /* 770 * We support at most 8 tries no matter which rate they're at, 771 * we cannot support max_rates * max_rate_tries as we set it 772 * here, but setting it correctly to 4/2 or so would limit us 773 * artificially if the RC algorithm wants just two rates, so 774 * let's say 4/7, we'll redistribute it at TX time, see the 775 * comments there. 776 */ 777 dev->max_rates = 4; 778 dev->max_rate_tries = 7; 779 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 + 780 sizeof(struct p54_tx_data); 781 782 /* 783 * For now, disable PS by default because it affects 784 * link stability significantly. 785 */ 786 dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 787 788 mutex_init(&priv->conf_mutex); 789 mutex_init(&priv->eeprom_mutex); 790 init_completion(&priv->stat_comp); 791 init_completion(&priv->eeprom_comp); 792 init_completion(&priv->beacon_comp); 793 INIT_DELAYED_WORK(&priv->work, p54_work); 794 795 eth_broadcast_addr(priv->mc_maclist[0]); 796 priv->curchan = NULL; 797 p54_reset_stats(priv); 798 return dev; 799 } 800 EXPORT_SYMBOL_GPL(p54_init_common); 801 802 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev) 803 { 804 struct p54_common __maybe_unused *priv = dev->priv; 805 int err; 806 807 err = ieee80211_register_hw(dev); 808 if (err) { 809 dev_err(pdev, "Cannot register device (%d).\n", err); 810 return err; 811 } 812 priv->registered = true; 813 814 #ifdef CONFIG_P54_LEDS 815 err = p54_init_leds(priv); 816 if (err) { 817 p54_unregister_common(dev); 818 return err; 819 } 820 #endif /* CONFIG_P54_LEDS */ 821 822 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy)); 823 return 0; 824 } 825 EXPORT_SYMBOL_GPL(p54_register_common); 826 827 void p54_free_common(struct ieee80211_hw *dev) 828 { 829 struct p54_common *priv = dev->priv; 830 unsigned int i; 831 832 for (i = 0; i < NUM_NL80211_BANDS; i++) 833 kfree(priv->band_table[i]); 834 835 kfree(priv->iq_autocal); 836 kfree(priv->output_limit); 837 kfree(priv->curve_data); 838 kfree(priv->rssi_db); 839 kfree(priv->used_rxkeys); 840 kfree(priv->survey); 841 priv->iq_autocal = NULL; 842 priv->output_limit = NULL; 843 priv->curve_data = NULL; 844 priv->rssi_db = NULL; 845 priv->used_rxkeys = NULL; 846 priv->survey = NULL; 847 ieee80211_free_hw(dev); 848 } 849 EXPORT_SYMBOL_GPL(p54_free_common); 850 851 void p54_unregister_common(struct ieee80211_hw *dev) 852 { 853 struct p54_common *priv = dev->priv; 854 855 if (priv->registered) { 856 priv->registered = false; 857 #ifdef CONFIG_P54_LEDS 858 p54_unregister_leds(priv); 859 #endif /* CONFIG_P54_LEDS */ 860 ieee80211_unregister_hw(dev); 861 } 862 863 mutex_destroy(&priv->conf_mutex); 864 mutex_destroy(&priv->eeprom_mutex); 865 } 866 EXPORT_SYMBOL_GPL(p54_unregister_common); 867