1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * mac80211 glue code for mac80211 Prism54 drivers 4 * 5 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net> 6 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de> 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 8 * 9 * Based on: 10 * - the islsm (softmac prism54) driver, which is: 11 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al. 12 * - stlc45xx driver 13 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). 14 */ 15 16 #include <linux/slab.h> 17 #include <linux/firmware.h> 18 #include <linux/etherdevice.h> 19 #include <linux/module.h> 20 21 #include <net/mac80211.h> 22 23 #include "p54.h" 24 #include "lmac.h" 25 26 static bool modparam_nohwcrypt; 27 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444); 28 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); 29 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>"); 30 MODULE_DESCRIPTION("Softmac Prism54 common code"); 31 MODULE_LICENSE("GPL"); 32 MODULE_ALIAS("prism54common"); 33 34 static int p54_sta_add_remove(struct ieee80211_hw *hw, 35 struct ieee80211_vif *vif, 36 struct ieee80211_sta *sta) 37 { 38 struct p54_common *priv = hw->priv; 39 40 /* 41 * Notify the firmware that we don't want or we don't 42 * need to buffer frames for this station anymore. 43 */ 44 45 p54_sta_unlock(priv, sta->addr); 46 47 return 0; 48 } 49 50 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif, 51 enum sta_notify_cmd notify_cmd, 52 struct ieee80211_sta *sta) 53 { 54 struct p54_common *priv = dev->priv; 55 56 switch (notify_cmd) { 57 case STA_NOTIFY_AWAKE: 58 /* update the firmware's filter table */ 59 p54_sta_unlock(priv, sta->addr); 60 break; 61 default: 62 break; 63 } 64 } 65 66 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta, 67 bool set) 68 { 69 struct p54_common *priv = dev->priv; 70 71 return p54_update_beacon_tim(priv, sta->aid, set); 72 } 73 74 u8 *p54_find_ie(struct sk_buff *skb, u8 ie) 75 { 76 struct ieee80211_mgmt *mgmt = (void *)skb->data; 77 u8 *pos, *end; 78 79 if (skb->len <= sizeof(mgmt)) 80 return NULL; 81 82 pos = (u8 *)mgmt->u.beacon.variable; 83 end = skb->data + skb->len; 84 while (pos < end) { 85 if (pos + 2 + pos[1] > end) 86 return NULL; 87 88 if (pos[0] == ie) 89 return pos; 90 91 pos += 2 + pos[1]; 92 } 93 return NULL; 94 } 95 96 static int p54_beacon_format_ie_tim(struct sk_buff *skb) 97 { 98 /* 99 * the good excuse for this mess is ... the firmware. 100 * The dummy TIM MUST be at the end of the beacon frame, 101 * because it'll be overwritten! 102 */ 103 u8 *tim; 104 u8 dtim_len; 105 u8 dtim_period; 106 u8 *next; 107 108 tim = p54_find_ie(skb, WLAN_EID_TIM); 109 if (!tim) 110 return 0; 111 112 dtim_len = tim[1]; 113 dtim_period = tim[3]; 114 next = tim + 2 + dtim_len; 115 116 if (dtim_len < 3) 117 return -EINVAL; 118 119 memmove(tim, next, skb_tail_pointer(skb) - next); 120 tim = skb_tail_pointer(skb) - (dtim_len + 2); 121 122 /* add the dummy at the end */ 123 tim[0] = WLAN_EID_TIM; 124 tim[1] = 3; 125 tim[2] = 0; 126 tim[3] = dtim_period; 127 tim[4] = 0; 128 129 if (dtim_len > 3) 130 skb_trim(skb, skb->len - (dtim_len - 3)); 131 132 return 0; 133 } 134 135 static int p54_beacon_update(struct p54_common *priv, 136 struct ieee80211_vif *vif) 137 { 138 struct ieee80211_tx_control control = { }; 139 struct sk_buff *beacon; 140 int ret; 141 142 beacon = ieee80211_beacon_get(priv->hw, vif, 0); 143 if (!beacon) 144 return -ENOMEM; 145 ret = p54_beacon_format_ie_tim(beacon); 146 if (ret) 147 return ret; 148 149 /* 150 * During operation, the firmware takes care of beaconing. 151 * The driver only needs to upload a new beacon template, once 152 * the template was changed by the stack or userspace. 153 * 154 * LMAC API 3.2.2 also specifies that the driver does not need 155 * to cancel the old beacon template by hand, instead the firmware 156 * will release the previous one through the feedback mechanism. 157 */ 158 p54_tx_80211(priv->hw, &control, beacon); 159 priv->tsf_high32 = 0; 160 priv->tsf_low32 = 0; 161 162 return 0; 163 } 164 165 static int p54_start(struct ieee80211_hw *dev) 166 { 167 struct p54_common *priv = dev->priv; 168 int err; 169 170 mutex_lock(&priv->conf_mutex); 171 err = priv->open(dev); 172 if (err) 173 goto out; 174 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47); 175 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94); 176 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0); 177 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0); 178 err = p54_set_edcf(priv); 179 if (err) 180 goto out; 181 182 eth_broadcast_addr(priv->bssid); 183 priv->mode = NL80211_IFTYPE_MONITOR; 184 err = p54_setup_mac(priv); 185 if (err) { 186 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 187 goto out; 188 } 189 190 ieee80211_queue_delayed_work(dev, &priv->work, 0); 191 192 priv->softled_state = 0; 193 err = p54_set_leds(priv); 194 195 out: 196 mutex_unlock(&priv->conf_mutex); 197 return err; 198 } 199 200 static void p54_stop(struct ieee80211_hw *dev, bool suspend) 201 { 202 struct p54_common *priv = dev->priv; 203 int i; 204 205 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 206 priv->softled_state = 0; 207 cancel_delayed_work_sync(&priv->work); 208 mutex_lock(&priv->conf_mutex); 209 p54_set_leds(priv); 210 priv->stop(dev); 211 skb_queue_purge(&priv->tx_pending); 212 skb_queue_purge(&priv->tx_queue); 213 for (i = 0; i < P54_QUEUE_NUM; i++) { 214 priv->tx_stats[i].count = 0; 215 priv->tx_stats[i].len = 0; 216 } 217 218 priv->beacon_req_id = cpu_to_le32(0); 219 priv->tsf_high32 = priv->tsf_low32 = 0; 220 mutex_unlock(&priv->conf_mutex); 221 } 222 223 static int p54_add_interface(struct ieee80211_hw *dev, 224 struct ieee80211_vif *vif) 225 { 226 struct p54_common *priv = dev->priv; 227 int err; 228 229 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER; 230 231 mutex_lock(&priv->conf_mutex); 232 if (priv->mode != NL80211_IFTYPE_MONITOR) { 233 mutex_unlock(&priv->conf_mutex); 234 return -EOPNOTSUPP; 235 } 236 237 priv->vif = vif; 238 239 switch (vif->type) { 240 case NL80211_IFTYPE_STATION: 241 case NL80211_IFTYPE_ADHOC: 242 case NL80211_IFTYPE_AP: 243 case NL80211_IFTYPE_MESH_POINT: 244 priv->mode = vif->type; 245 break; 246 default: 247 mutex_unlock(&priv->conf_mutex); 248 return -EOPNOTSUPP; 249 } 250 251 memcpy(priv->mac_addr, vif->addr, ETH_ALEN); 252 err = p54_setup_mac(priv); 253 mutex_unlock(&priv->conf_mutex); 254 return err; 255 } 256 257 static void p54_remove_interface(struct ieee80211_hw *dev, 258 struct ieee80211_vif *vif) 259 { 260 struct p54_common *priv = dev->priv; 261 262 mutex_lock(&priv->conf_mutex); 263 priv->vif = NULL; 264 265 /* 266 * LMAC API 3.2.2 states that any active beacon template must be 267 * canceled by the driver before attempting a mode transition. 268 */ 269 if (le32_to_cpu(priv->beacon_req_id) != 0) { 270 p54_tx_cancel(priv, priv->beacon_req_id); 271 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ); 272 } 273 priv->mode = NL80211_IFTYPE_MONITOR; 274 eth_zero_addr(priv->mac_addr); 275 eth_zero_addr(priv->bssid); 276 p54_setup_mac(priv); 277 mutex_unlock(&priv->conf_mutex); 278 } 279 280 static int p54_wait_for_stats(struct ieee80211_hw *dev) 281 { 282 struct p54_common *priv = dev->priv; 283 int ret; 284 285 priv->update_stats = true; 286 ret = p54_fetch_statistics(priv); 287 if (ret) 288 return ret; 289 290 ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ); 291 if (ret == 0) 292 return -ETIMEDOUT; 293 294 return 0; 295 } 296 297 static void p54_reset_stats(struct p54_common *priv) 298 { 299 struct ieee80211_channel *chan = priv->curchan; 300 301 if (chan) { 302 struct survey_info *info = &priv->survey[chan->hw_value]; 303 304 /* only reset channel statistics, don't touch .filled, etc. */ 305 info->time = 0; 306 info->time_busy = 0; 307 info->time_tx = 0; 308 } 309 310 priv->update_stats = true; 311 priv->survey_raw.active = 0; 312 priv->survey_raw.cca = 0; 313 priv->survey_raw.tx = 0; 314 } 315 316 static int p54_config(struct ieee80211_hw *dev, u32 changed) 317 { 318 int ret = 0; 319 struct p54_common *priv = dev->priv; 320 struct ieee80211_conf *conf = &dev->conf; 321 322 mutex_lock(&priv->conf_mutex); 323 if (changed & IEEE80211_CONF_CHANGE_POWER) 324 priv->output_power = conf->power_level << 2; 325 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { 326 struct ieee80211_channel *oldchan; 327 WARN_ON(p54_wait_for_stats(dev)); 328 oldchan = priv->curchan; 329 priv->curchan = NULL; 330 ret = p54_scan(priv, P54_SCAN_EXIT, 0); 331 if (ret) { 332 priv->curchan = oldchan; 333 goto out; 334 } 335 /* 336 * TODO: Use the LM_SCAN_TRAP to determine the current 337 * operating channel. 338 */ 339 priv->curchan = priv->hw->conf.chandef.chan; 340 p54_reset_stats(priv); 341 WARN_ON(p54_fetch_statistics(priv)); 342 } 343 if (changed & IEEE80211_CONF_CHANGE_PS) { 344 WARN_ON(p54_wait_for_stats(dev)); 345 ret = p54_set_ps(priv); 346 if (ret) 347 goto out; 348 WARN_ON(p54_wait_for_stats(dev)); 349 } 350 if (changed & IEEE80211_CONF_CHANGE_IDLE) { 351 WARN_ON(p54_wait_for_stats(dev)); 352 ret = p54_setup_mac(priv); 353 if (ret) 354 goto out; 355 WARN_ON(p54_wait_for_stats(dev)); 356 } 357 358 out: 359 mutex_unlock(&priv->conf_mutex); 360 return ret; 361 } 362 363 static u64 p54_prepare_multicast(struct ieee80211_hw *dev, 364 struct netdev_hw_addr_list *mc_list) 365 { 366 struct p54_common *priv = dev->priv; 367 struct netdev_hw_addr *ha; 368 int i; 369 370 BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) != 371 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list)); 372 /* 373 * The first entry is reserved for the global broadcast MAC. 374 * Otherwise the firmware will drop it and ARP will no longer work. 375 */ 376 i = 1; 377 priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i; 378 netdev_hw_addr_list_for_each(ha, mc_list) { 379 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN); 380 i++; 381 if (i >= ARRAY_SIZE(priv->mc_maclist)) 382 break; 383 } 384 385 return 1; /* update */ 386 } 387 388 static void p54_configure_filter(struct ieee80211_hw *dev, 389 unsigned int changed_flags, 390 unsigned int *total_flags, 391 u64 multicast) 392 { 393 struct p54_common *priv = dev->priv; 394 395 *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS; 396 397 priv->filter_flags = *total_flags; 398 399 if (changed_flags & FIF_OTHER_BSS) 400 p54_setup_mac(priv); 401 402 if (changed_flags & FIF_ALLMULTI || multicast) 403 p54_set_groupfilter(priv); 404 } 405 406 static int p54_conf_tx(struct ieee80211_hw *dev, 407 struct ieee80211_vif *vif, 408 unsigned int link_id, u16 queue, 409 const struct ieee80211_tx_queue_params *params) 410 { 411 struct p54_common *priv = dev->priv; 412 int ret; 413 414 mutex_lock(&priv->conf_mutex); 415 P54_SET_QUEUE(priv->qos_params[queue], params->aifs, 416 params->cw_min, params->cw_max, params->txop); 417 ret = p54_set_edcf(priv); 418 mutex_unlock(&priv->conf_mutex); 419 return ret; 420 } 421 422 static void p54_work(struct work_struct *work) 423 { 424 struct p54_common *priv = container_of(work, struct p54_common, 425 work.work); 426 427 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) 428 return ; 429 430 /* 431 * TODO: walk through tx_queue and do the following tasks 432 * 1. initiate bursts. 433 * 2. cancel stuck frames / reset the device if necessary. 434 */ 435 436 mutex_lock(&priv->conf_mutex); 437 WARN_ON_ONCE(p54_fetch_statistics(priv)); 438 mutex_unlock(&priv->conf_mutex); 439 } 440 441 static int p54_get_stats(struct ieee80211_hw *dev, 442 struct ieee80211_low_level_stats *stats) 443 { 444 struct p54_common *priv = dev->priv; 445 446 memcpy(stats, &priv->stats, sizeof(*stats)); 447 return 0; 448 } 449 450 static void p54_bss_info_changed(struct ieee80211_hw *dev, 451 struct ieee80211_vif *vif, 452 struct ieee80211_bss_conf *info, 453 u64 changed) 454 { 455 struct p54_common *priv = dev->priv; 456 457 mutex_lock(&priv->conf_mutex); 458 if (changed & BSS_CHANGED_BSSID) { 459 memcpy(priv->bssid, info->bssid, ETH_ALEN); 460 p54_setup_mac(priv); 461 } 462 463 if (changed & BSS_CHANGED_BEACON) { 464 p54_scan(priv, P54_SCAN_EXIT, 0); 465 p54_setup_mac(priv); 466 p54_beacon_update(priv, vif); 467 p54_set_edcf(priv); 468 } 469 470 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) { 471 priv->use_short_slot = info->use_short_slot; 472 p54_set_edcf(priv); 473 } 474 if (changed & BSS_CHANGED_BASIC_RATES) { 475 if (dev->conf.chandef.chan->band == NL80211_BAND_5GHZ) 476 priv->basic_rate_mask = (info->basic_rates << 4); 477 else 478 priv->basic_rate_mask = info->basic_rates; 479 p54_setup_mac(priv); 480 if (priv->fw_var >= 0x500) 481 p54_scan(priv, P54_SCAN_EXIT, 0); 482 } 483 if (changed & BSS_CHANGED_ASSOC) { 484 if (vif->cfg.assoc) { 485 priv->aid = vif->cfg.aid; 486 priv->wakeup_timer = info->beacon_int * 487 info->dtim_period * 5; 488 p54_setup_mac(priv); 489 } else { 490 priv->wakeup_timer = 500; 491 priv->aid = 0; 492 } 493 } 494 495 mutex_unlock(&priv->conf_mutex); 496 } 497 498 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd, 499 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 500 struct ieee80211_key_conf *key) 501 { 502 struct p54_common *priv = dev->priv; 503 int slot, ret = 0; 504 u8 algo = 0; 505 u8 *addr = NULL; 506 507 if (modparam_nohwcrypt) 508 return -EOPNOTSUPP; 509 510 if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) { 511 /* 512 * Unfortunately most/all firmwares are trying to decrypt 513 * incoming management frames if a suitable key can be found. 514 * However, in doing so the data in these frames gets 515 * corrupted. So, we can't have firmware supported crypto 516 * offload in this case. 517 */ 518 return -EOPNOTSUPP; 519 } 520 521 mutex_lock(&priv->conf_mutex); 522 if (cmd == SET_KEY) { 523 switch (key->cipher) { 524 case WLAN_CIPHER_SUITE_TKIP: 525 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL | 526 BR_DESC_PRIV_CAP_TKIP))) { 527 ret = -EOPNOTSUPP; 528 goto out_unlock; 529 } 530 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 531 algo = P54_CRYPTO_TKIPMICHAEL; 532 break; 533 case WLAN_CIPHER_SUITE_WEP40: 534 case WLAN_CIPHER_SUITE_WEP104: 535 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) { 536 ret = -EOPNOTSUPP; 537 goto out_unlock; 538 } 539 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 540 algo = P54_CRYPTO_WEP; 541 break; 542 case WLAN_CIPHER_SUITE_CCMP: 543 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) { 544 ret = -EOPNOTSUPP; 545 goto out_unlock; 546 } 547 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 548 algo = P54_CRYPTO_AESCCMP; 549 break; 550 default: 551 ret = -EOPNOTSUPP; 552 goto out_unlock; 553 } 554 slot = bitmap_find_free_region(priv->used_rxkeys, 555 priv->rx_keycache_size, 0); 556 557 if (slot < 0) { 558 /* 559 * The device supports the chosen algorithm, but the 560 * firmware does not provide enough key slots to store 561 * all of them. 562 * But encryption offload for outgoing frames is always 563 * possible, so we just pretend that the upload was 564 * successful and do the decryption in software. 565 */ 566 567 /* mark the key as invalid. */ 568 key->hw_key_idx = 0xff; 569 goto out_unlock; 570 } 571 572 key->flags |= IEEE80211_KEY_FLAG_RESERVE_TAILROOM; 573 } else { 574 slot = key->hw_key_idx; 575 576 if (slot == 0xff) { 577 /* This key was not uploaded into the rx key cache. */ 578 579 goto out_unlock; 580 } 581 582 bitmap_release_region(priv->used_rxkeys, slot, 0); 583 algo = 0; 584 } 585 586 if (sta) 587 addr = sta->addr; 588 589 ret = p54_upload_key(priv, algo, slot, key->keyidx, 590 key->keylen, addr, key->key); 591 if (ret) { 592 bitmap_release_region(priv->used_rxkeys, slot, 0); 593 ret = -EOPNOTSUPP; 594 goto out_unlock; 595 } 596 597 key->hw_key_idx = slot; 598 599 out_unlock: 600 mutex_unlock(&priv->conf_mutex); 601 return ret; 602 } 603 604 static int p54_get_survey(struct ieee80211_hw *dev, int idx, 605 struct survey_info *survey) 606 { 607 struct p54_common *priv = dev->priv; 608 struct ieee80211_channel *chan; 609 int err, tries; 610 bool in_use = false; 611 612 if (idx >= priv->chan_num) 613 return -ENOENT; 614 615 #define MAX_TRIES 1 616 for (tries = 0; tries < MAX_TRIES; tries++) { 617 chan = priv->curchan; 618 if (chan && chan->hw_value == idx) { 619 mutex_lock(&priv->conf_mutex); 620 err = p54_wait_for_stats(dev); 621 mutex_unlock(&priv->conf_mutex); 622 if (err) 623 return err; 624 625 in_use = true; 626 } 627 628 memcpy(survey, &priv->survey[idx], sizeof(*survey)); 629 630 if (in_use) { 631 /* test if the reported statistics are valid. */ 632 if (survey->time != 0) { 633 survey->filled |= SURVEY_INFO_IN_USE; 634 } else { 635 /* 636 * hw/fw has not accumulated enough sample sets. 637 * Wait for 100ms, this ought to be enough to 638 * get at least one non-null set of channel 639 * usage statistics. 640 */ 641 msleep(100); 642 continue; 643 } 644 } 645 return 0; 646 } 647 return -ETIMEDOUT; 648 #undef MAX_TRIES 649 } 650 651 static unsigned int p54_flush_count(struct p54_common *priv) 652 { 653 unsigned int total = 0, i; 654 655 BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats)); 656 657 /* 658 * Because the firmware has the sole control over any frames 659 * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they 660 * don't really count as pending or active. 661 */ 662 for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++) 663 total += priv->tx_stats[i].len; 664 return total; 665 } 666 667 static void p54_flush(struct ieee80211_hw *dev, struct ieee80211_vif *vif, 668 u32 queues, bool drop) 669 { 670 struct p54_common *priv = dev->priv; 671 unsigned int total, i; 672 673 /* 674 * Currently, it wouldn't really matter if we wait for one second 675 * or 15 minutes. But once someone gets around and completes the 676 * TODOs [ancel stuck frames / reset device] in p54_work, it will 677 * suddenly make sense to wait that long. 678 */ 679 i = P54_STATISTICS_UPDATE * 2 / 20; 680 681 /* 682 * In this case no locking is required because as we speak the 683 * queues have already been stopped and no new frames can sneak 684 * up from behind. 685 */ 686 while ((total = p54_flush_count(priv)) && i--) { 687 /* waste time */ 688 msleep(20); 689 } 690 691 WARN(total, "tx flush timeout, unresponsive firmware"); 692 } 693 694 static void p54_set_coverage_class(struct ieee80211_hw *dev, 695 s16 coverage_class) 696 { 697 struct p54_common *priv = dev->priv; 698 699 mutex_lock(&priv->conf_mutex); 700 /* support all coverage class values as in 802.11-2007 Table 7-27 */ 701 priv->coverage_class = clamp_t(u8, coverage_class, 0, 31); 702 p54_set_edcf(priv); 703 mutex_unlock(&priv->conf_mutex); 704 } 705 706 static const struct ieee80211_ops p54_ops = { 707 .add_chanctx = ieee80211_emulate_add_chanctx, 708 .remove_chanctx = ieee80211_emulate_remove_chanctx, 709 .change_chanctx = ieee80211_emulate_change_chanctx, 710 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx, 711 .tx = p54_tx_80211, 712 .wake_tx_queue = ieee80211_handle_wake_tx_queue, 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 bitmap_free(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