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 dev_kfree_skb_any(beacon); 148 return ret; 149 } 150 151 /* 152 * During operation, the firmware takes care of beaconing. 153 * The driver only needs to upload a new beacon template, once 154 * the template was changed by the stack or userspace. 155 * 156 * LMAC API 3.2.2 also specifies that the driver does not need 157 * to cancel the old beacon template by hand, instead the firmware 158 * will release the previous one through the feedback mechanism. 159 */ 160 p54_tx_80211(priv->hw, &control, beacon); 161 priv->tsf_high32 = 0; 162 priv->tsf_low32 = 0; 163 164 return 0; 165 } 166 167 static int p54_start(struct ieee80211_hw *dev) 168 { 169 struct p54_common *priv = dev->priv; 170 int err; 171 172 mutex_lock(&priv->conf_mutex); 173 err = priv->open(dev); 174 if (err) 175 goto out; 176 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47); 177 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94); 178 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0); 179 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0); 180 err = p54_set_edcf(priv); 181 if (err) 182 goto out; 183 184 eth_broadcast_addr(priv->bssid); 185 priv->mode = NL80211_IFTYPE_MONITOR; 186 err = p54_setup_mac(priv); 187 if (err) { 188 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 189 goto out; 190 } 191 192 ieee80211_queue_delayed_work(dev, &priv->work, 0); 193 194 priv->softled_state = 0; 195 err = p54_set_leds(priv); 196 197 out: 198 mutex_unlock(&priv->conf_mutex); 199 return err; 200 } 201 202 static void p54_stop(struct ieee80211_hw *dev, bool suspend) 203 { 204 struct p54_common *priv = dev->priv; 205 int i; 206 207 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 208 priv->softled_state = 0; 209 cancel_delayed_work_sync(&priv->work); 210 mutex_lock(&priv->conf_mutex); 211 p54_set_leds(priv); 212 priv->stop(dev); 213 skb_queue_purge(&priv->tx_pending); 214 skb_queue_purge(&priv->tx_queue); 215 for (i = 0; i < P54_QUEUE_NUM; i++) { 216 priv->tx_stats[i].count = 0; 217 priv->tx_stats[i].len = 0; 218 } 219 220 priv->beacon_req_id = cpu_to_le32(0); 221 priv->tsf_high32 = priv->tsf_low32 = 0; 222 mutex_unlock(&priv->conf_mutex); 223 } 224 225 static int p54_add_interface(struct ieee80211_hw *dev, 226 struct ieee80211_vif *vif) 227 { 228 struct p54_common *priv = dev->priv; 229 int err; 230 231 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER; 232 233 mutex_lock(&priv->conf_mutex); 234 if (priv->mode != NL80211_IFTYPE_MONITOR) { 235 mutex_unlock(&priv->conf_mutex); 236 return -EOPNOTSUPP; 237 } 238 239 priv->vif = vif; 240 241 switch (vif->type) { 242 case NL80211_IFTYPE_STATION: 243 case NL80211_IFTYPE_ADHOC: 244 case NL80211_IFTYPE_AP: 245 case NL80211_IFTYPE_MESH_POINT: 246 priv->mode = vif->type; 247 break; 248 default: 249 mutex_unlock(&priv->conf_mutex); 250 return -EOPNOTSUPP; 251 } 252 253 memcpy(priv->mac_addr, vif->addr, ETH_ALEN); 254 err = p54_setup_mac(priv); 255 mutex_unlock(&priv->conf_mutex); 256 return err; 257 } 258 259 static void p54_remove_interface(struct ieee80211_hw *dev, 260 struct ieee80211_vif *vif) 261 { 262 struct p54_common *priv = dev->priv; 263 264 mutex_lock(&priv->conf_mutex); 265 priv->vif = NULL; 266 267 /* 268 * LMAC API 3.2.2 states that any active beacon template must be 269 * canceled by the driver before attempting a mode transition. 270 */ 271 if (le32_to_cpu(priv->beacon_req_id) != 0) { 272 p54_tx_cancel(priv, priv->beacon_req_id); 273 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ); 274 } 275 priv->mode = NL80211_IFTYPE_MONITOR; 276 eth_zero_addr(priv->mac_addr); 277 eth_zero_addr(priv->bssid); 278 p54_setup_mac(priv); 279 mutex_unlock(&priv->conf_mutex); 280 } 281 282 static int p54_wait_for_stats(struct ieee80211_hw *dev) 283 { 284 struct p54_common *priv = dev->priv; 285 int ret; 286 287 priv->update_stats = true; 288 ret = p54_fetch_statistics(priv); 289 if (ret) 290 return ret; 291 292 ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ); 293 if (ret == 0) 294 return -ETIMEDOUT; 295 296 return 0; 297 } 298 299 static void p54_reset_stats(struct p54_common *priv) 300 { 301 struct ieee80211_channel *chan = priv->curchan; 302 303 if (chan) { 304 struct survey_info *info = &priv->survey[chan->hw_value]; 305 306 /* only reset channel statistics, don't touch .filled, etc. */ 307 info->time = 0; 308 info->time_busy = 0; 309 info->time_tx = 0; 310 } 311 312 priv->update_stats = true; 313 priv->survey_raw.active = 0; 314 priv->survey_raw.cca = 0; 315 priv->survey_raw.tx = 0; 316 } 317 318 static int p54_config(struct ieee80211_hw *dev, int radio_idx, u32 changed) 319 { 320 int ret = 0; 321 struct p54_common *priv = dev->priv; 322 struct ieee80211_conf *conf = &dev->conf; 323 324 mutex_lock(&priv->conf_mutex); 325 if (changed & IEEE80211_CONF_CHANGE_POWER) 326 priv->output_power = conf->power_level << 2; 327 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { 328 struct ieee80211_channel *oldchan; 329 WARN_ON(p54_wait_for_stats(dev)); 330 oldchan = priv->curchan; 331 priv->curchan = NULL; 332 ret = p54_scan(priv, P54_SCAN_EXIT, 0); 333 if (ret) { 334 priv->curchan = oldchan; 335 goto out; 336 } 337 /* 338 * TODO: Use the LM_SCAN_TRAP to determine the current 339 * operating channel. 340 */ 341 priv->curchan = priv->hw->conf.chandef.chan; 342 p54_reset_stats(priv); 343 WARN_ON(p54_fetch_statistics(priv)); 344 } 345 if (changed & IEEE80211_CONF_CHANGE_PS) { 346 WARN_ON(p54_wait_for_stats(dev)); 347 ret = p54_set_ps(priv); 348 if (ret) 349 goto out; 350 WARN_ON(p54_wait_for_stats(dev)); 351 } 352 if (changed & IEEE80211_CONF_CHANGE_IDLE) { 353 WARN_ON(p54_wait_for_stats(dev)); 354 ret = p54_setup_mac(priv); 355 if (ret) 356 goto out; 357 WARN_ON(p54_wait_for_stats(dev)); 358 } 359 360 out: 361 mutex_unlock(&priv->conf_mutex); 362 return ret; 363 } 364 365 static u64 p54_prepare_multicast(struct ieee80211_hw *dev, 366 struct netdev_hw_addr_list *mc_list) 367 { 368 struct p54_common *priv = dev->priv; 369 struct netdev_hw_addr *ha; 370 int i; 371 372 BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) != 373 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list)); 374 /* 375 * The first entry is reserved for the global broadcast MAC. 376 * Otherwise the firmware will drop it and ARP will no longer work. 377 */ 378 i = 1; 379 priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i; 380 netdev_hw_addr_list_for_each(ha, mc_list) { 381 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN); 382 i++; 383 if (i >= ARRAY_SIZE(priv->mc_maclist)) 384 break; 385 } 386 387 return 1; /* update */ 388 } 389 390 static void p54_configure_filter(struct ieee80211_hw *dev, 391 unsigned int changed_flags, 392 unsigned int *total_flags, 393 u64 multicast) 394 { 395 struct p54_common *priv = dev->priv; 396 397 *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS; 398 399 priv->filter_flags = *total_flags; 400 401 if (changed_flags & FIF_OTHER_BSS) 402 p54_setup_mac(priv); 403 404 if (changed_flags & FIF_ALLMULTI || multicast) 405 p54_set_groupfilter(priv); 406 } 407 408 static int p54_conf_tx(struct ieee80211_hw *dev, 409 struct ieee80211_vif *vif, 410 unsigned int link_id, 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 P54_SET_QUEUE(priv->qos_params[queue], params->aifs, 418 params->cw_min, params->cw_max, params->txop); 419 ret = p54_set_edcf(priv); 420 mutex_unlock(&priv->conf_mutex); 421 return ret; 422 } 423 424 static void p54_work(struct work_struct *work) 425 { 426 struct p54_common *priv = container_of(work, struct p54_common, 427 work.work); 428 429 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) 430 return ; 431 432 /* 433 * TODO: walk through tx_queue and do the following tasks 434 * 1. initiate bursts. 435 * 2. cancel stuck frames / reset the device if necessary. 436 */ 437 438 mutex_lock(&priv->conf_mutex); 439 WARN_ON_ONCE(p54_fetch_statistics(priv)); 440 mutex_unlock(&priv->conf_mutex); 441 } 442 443 static int p54_get_stats(struct ieee80211_hw *dev, 444 struct ieee80211_low_level_stats *stats) 445 { 446 struct p54_common *priv = dev->priv; 447 448 memcpy(stats, &priv->stats, sizeof(*stats)); 449 return 0; 450 } 451 452 static void p54_bss_info_changed(struct ieee80211_hw *dev, 453 struct ieee80211_vif *vif, 454 struct ieee80211_bss_conf *info, 455 u64 changed) 456 { 457 struct p54_common *priv = dev->priv; 458 459 mutex_lock(&priv->conf_mutex); 460 if (changed & BSS_CHANGED_BSSID) { 461 memcpy(priv->bssid, info->bssid, ETH_ALEN); 462 p54_setup_mac(priv); 463 } 464 465 if (changed & BSS_CHANGED_BEACON) { 466 p54_scan(priv, P54_SCAN_EXIT, 0); 467 p54_setup_mac(priv); 468 p54_beacon_update(priv, vif); 469 p54_set_edcf(priv); 470 } 471 472 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) { 473 priv->use_short_slot = info->use_short_slot; 474 p54_set_edcf(priv); 475 } 476 if (changed & BSS_CHANGED_BASIC_RATES) { 477 if (dev->conf.chandef.chan->band == NL80211_BAND_5GHZ) 478 priv->basic_rate_mask = (info->basic_rates << 4); 479 else 480 priv->basic_rate_mask = info->basic_rates; 481 p54_setup_mac(priv); 482 if (priv->fw_var >= 0x500) 483 p54_scan(priv, P54_SCAN_EXIT, 0); 484 } 485 if (changed & BSS_CHANGED_ASSOC) { 486 if (vif->cfg.assoc) { 487 priv->aid = vif->cfg.aid; 488 priv->wakeup_timer = info->beacon_int * 489 info->dtim_period * 5; 490 p54_setup_mac(priv); 491 } else { 492 priv->wakeup_timer = 500; 493 priv->aid = 0; 494 } 495 } 496 497 mutex_unlock(&priv->conf_mutex); 498 } 499 500 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd, 501 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 502 struct ieee80211_key_conf *key) 503 { 504 struct p54_common *priv = dev->priv; 505 int slot, ret = 0; 506 u8 algo = 0; 507 u8 *addr = NULL; 508 509 if (modparam_nohwcrypt) 510 return -EOPNOTSUPP; 511 512 if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) { 513 /* 514 * Unfortunately most/all firmwares are trying to decrypt 515 * incoming management frames if a suitable key can be found. 516 * However, in doing so the data in these frames gets 517 * corrupted. So, we can't have firmware supported crypto 518 * offload in this case. 519 */ 520 return -EOPNOTSUPP; 521 } 522 523 mutex_lock(&priv->conf_mutex); 524 if (cmd == SET_KEY) { 525 switch (key->cipher) { 526 case WLAN_CIPHER_SUITE_TKIP: 527 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL | 528 BR_DESC_PRIV_CAP_TKIP))) { 529 ret = -EOPNOTSUPP; 530 goto out_unlock; 531 } 532 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 533 algo = P54_CRYPTO_TKIPMICHAEL; 534 break; 535 case WLAN_CIPHER_SUITE_WEP40: 536 case WLAN_CIPHER_SUITE_WEP104: 537 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) { 538 ret = -EOPNOTSUPP; 539 goto out_unlock; 540 } 541 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 542 algo = P54_CRYPTO_WEP; 543 break; 544 case WLAN_CIPHER_SUITE_CCMP: 545 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) { 546 ret = -EOPNOTSUPP; 547 goto out_unlock; 548 } 549 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 550 algo = P54_CRYPTO_AESCCMP; 551 break; 552 default: 553 ret = -EOPNOTSUPP; 554 goto out_unlock; 555 } 556 slot = bitmap_find_free_region(priv->used_rxkeys, 557 priv->rx_keycache_size, 0); 558 559 if (slot < 0) { 560 /* 561 * The device supports the chosen algorithm, but the 562 * firmware does not provide enough key slots to store 563 * all of them. 564 * But encryption offload for outgoing frames is always 565 * possible, so we just pretend that the upload was 566 * successful and do the decryption in software. 567 */ 568 569 /* mark the key as invalid. */ 570 key->hw_key_idx = 0xff; 571 goto out_unlock; 572 } 573 574 key->flags |= IEEE80211_KEY_FLAG_RESERVE_TAILROOM; 575 } else { 576 slot = key->hw_key_idx; 577 578 if (slot == 0xff) { 579 /* This key was not uploaded into the rx key cache. */ 580 581 goto out_unlock; 582 } 583 584 bitmap_release_region(priv->used_rxkeys, slot, 0); 585 algo = 0; 586 } 587 588 if (sta) 589 addr = sta->addr; 590 591 ret = p54_upload_key(priv, algo, slot, key->keyidx, 592 key->keylen, addr, key->key); 593 if (ret) { 594 bitmap_release_region(priv->used_rxkeys, slot, 0); 595 ret = -EOPNOTSUPP; 596 goto out_unlock; 597 } 598 599 key->hw_key_idx = slot; 600 601 out_unlock: 602 mutex_unlock(&priv->conf_mutex); 603 return ret; 604 } 605 606 static int p54_get_survey(struct ieee80211_hw *dev, int idx, 607 struct survey_info *survey) 608 { 609 struct p54_common *priv = dev->priv; 610 struct ieee80211_channel *chan; 611 int err, tries; 612 bool in_use = false; 613 614 if (idx >= priv->chan_num) 615 return -ENOENT; 616 617 #define MAX_TRIES 1 618 for (tries = 0; tries < MAX_TRIES; tries++) { 619 chan = priv->curchan; 620 if (chan && chan->hw_value == idx) { 621 mutex_lock(&priv->conf_mutex); 622 err = p54_wait_for_stats(dev); 623 mutex_unlock(&priv->conf_mutex); 624 if (err) 625 return err; 626 627 in_use = true; 628 } 629 630 memcpy(survey, &priv->survey[idx], sizeof(*survey)); 631 632 if (in_use) { 633 /* test if the reported statistics are valid. */ 634 if (survey->time != 0) { 635 survey->filled |= SURVEY_INFO_IN_USE; 636 } else { 637 /* 638 * hw/fw has not accumulated enough sample sets. 639 * Wait for 100ms, this ought to be enough to 640 * get at least one non-null set of channel 641 * usage statistics. 642 */ 643 msleep(100); 644 continue; 645 } 646 } 647 return 0; 648 } 649 return -ETIMEDOUT; 650 #undef MAX_TRIES 651 } 652 653 static unsigned int p54_flush_count(struct p54_common *priv) 654 { 655 unsigned int total = 0, i; 656 657 BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats)); 658 659 /* 660 * Because the firmware has the sole control over any frames 661 * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they 662 * don't really count as pending or active. 663 */ 664 for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++) 665 total += priv->tx_stats[i].len; 666 return total; 667 } 668 669 static void p54_flush(struct ieee80211_hw *dev, struct ieee80211_vif *vif, 670 u32 queues, bool drop) 671 { 672 struct p54_common *priv = dev->priv; 673 unsigned int total, i; 674 675 /* 676 * Currently, it wouldn't really matter if we wait for one second 677 * or 15 minutes. But once someone gets around and completes the 678 * TODOs [ancel stuck frames / reset device] in p54_work, it will 679 * suddenly make sense to wait that long. 680 */ 681 i = P54_STATISTICS_UPDATE * 2 / 20; 682 683 /* 684 * In this case no locking is required because as we speak the 685 * queues have already been stopped and no new frames can sneak 686 * up from behind. 687 */ 688 while ((total = p54_flush_count(priv)) && i--) { 689 /* waste time */ 690 msleep(20); 691 } 692 693 WARN(total, "tx flush timeout, unresponsive firmware"); 694 } 695 696 static void p54_set_coverage_class(struct ieee80211_hw *dev, 697 int radio_idx, 698 s16 coverage_class) 699 { 700 struct p54_common *priv = dev->priv; 701 702 mutex_lock(&priv->conf_mutex); 703 /* support all coverage class values as in 802.11-2007 Table 7-27 */ 704 priv->coverage_class = clamp_t(u8, coverage_class, 0, 31); 705 p54_set_edcf(priv); 706 mutex_unlock(&priv->conf_mutex); 707 } 708 709 static const struct ieee80211_ops p54_ops = { 710 .add_chanctx = ieee80211_emulate_add_chanctx, 711 .remove_chanctx = ieee80211_emulate_remove_chanctx, 712 .change_chanctx = ieee80211_emulate_change_chanctx, 713 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx, 714 .tx = p54_tx_80211, 715 .wake_tx_queue = ieee80211_handle_wake_tx_queue, 716 .start = p54_start, 717 .stop = p54_stop, 718 .add_interface = p54_add_interface, 719 .remove_interface = p54_remove_interface, 720 .set_tim = p54_set_tim, 721 .sta_notify = p54_sta_notify, 722 .sta_add = p54_sta_add_remove, 723 .sta_remove = p54_sta_add_remove, 724 .set_key = p54_set_key, 725 .config = p54_config, 726 .flush = p54_flush, 727 .bss_info_changed = p54_bss_info_changed, 728 .prepare_multicast = p54_prepare_multicast, 729 .configure_filter = p54_configure_filter, 730 .conf_tx = p54_conf_tx, 731 .get_stats = p54_get_stats, 732 .get_survey = p54_get_survey, 733 .set_coverage_class = p54_set_coverage_class, 734 }; 735 736 struct ieee80211_hw *p54_init_common(size_t priv_data_len) 737 { 738 struct ieee80211_hw *dev; 739 struct p54_common *priv; 740 741 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops); 742 if (!dev) 743 return NULL; 744 745 priv = dev->priv; 746 priv->hw = dev; 747 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 748 priv->basic_rate_mask = 0x15f; 749 spin_lock_init(&priv->tx_stats_lock); 750 skb_queue_head_init(&priv->tx_queue); 751 skb_queue_head_init(&priv->tx_pending); 752 ieee80211_hw_set(dev, REPORTS_TX_ACK_STATUS); 753 ieee80211_hw_set(dev, MFP_CAPABLE); 754 ieee80211_hw_set(dev, PS_NULLFUNC_STACK); 755 ieee80211_hw_set(dev, SUPPORTS_PS); 756 ieee80211_hw_set(dev, RX_INCLUDES_FCS); 757 ieee80211_hw_set(dev, SIGNAL_DBM); 758 759 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | 760 BIT(NL80211_IFTYPE_ADHOC) | 761 BIT(NL80211_IFTYPE_AP) | 762 BIT(NL80211_IFTYPE_MESH_POINT); 763 764 priv->beacon_req_id = cpu_to_le32(0); 765 priv->tx_stats[P54_QUEUE_BEACON].limit = 1; 766 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1; 767 priv->tx_stats[P54_QUEUE_MGMT].limit = 3; 768 priv->tx_stats[P54_QUEUE_CAB].limit = 3; 769 priv->tx_stats[P54_QUEUE_DATA].limit = 5; 770 dev->queues = 1; 771 priv->noise = -94; 772 /* 773 * We support at most 8 tries no matter which rate they're at, 774 * we cannot support max_rates * max_rate_tries as we set it 775 * here, but setting it correctly to 4/2 or so would limit us 776 * artificially if the RC algorithm wants just two rates, so 777 * let's say 4/7, we'll redistribute it at TX time, see the 778 * comments there. 779 */ 780 dev->max_rates = 4; 781 dev->max_rate_tries = 7; 782 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 + 783 sizeof(struct p54_tx_data); 784 785 /* 786 * For now, disable PS by default because it affects 787 * link stability significantly. 788 */ 789 dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 790 791 mutex_init(&priv->conf_mutex); 792 mutex_init(&priv->eeprom_mutex); 793 init_completion(&priv->stat_comp); 794 init_completion(&priv->eeprom_comp); 795 init_completion(&priv->beacon_comp); 796 INIT_DELAYED_WORK(&priv->work, p54_work); 797 798 eth_broadcast_addr(priv->mc_maclist[0]); 799 priv->curchan = NULL; 800 p54_reset_stats(priv); 801 return dev; 802 } 803 EXPORT_SYMBOL_GPL(p54_init_common); 804 805 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev) 806 { 807 struct p54_common __maybe_unused *priv = dev->priv; 808 int err; 809 810 err = ieee80211_register_hw(dev); 811 if (err) { 812 dev_err(pdev, "Cannot register device (%d).\n", err); 813 return err; 814 } 815 priv->registered = true; 816 817 #ifdef CONFIG_P54_LEDS 818 err = p54_init_leds(priv); 819 if (err) { 820 p54_unregister_common(dev); 821 return err; 822 } 823 #endif /* CONFIG_P54_LEDS */ 824 825 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy)); 826 return 0; 827 } 828 EXPORT_SYMBOL_GPL(p54_register_common); 829 830 void p54_free_common(struct ieee80211_hw *dev) 831 { 832 struct p54_common *priv = dev->priv; 833 unsigned int i; 834 835 for (i = 0; i < NUM_NL80211_BANDS; i++) 836 kfree(priv->band_table[i]); 837 838 kfree(priv->iq_autocal); 839 kfree(priv->output_limit); 840 kfree(priv->curve_data); 841 kfree(priv->rssi_db); 842 bitmap_free(priv->used_rxkeys); 843 kfree(priv->survey); 844 priv->iq_autocal = NULL; 845 priv->output_limit = NULL; 846 priv->curve_data = NULL; 847 priv->rssi_db = NULL; 848 priv->used_rxkeys = NULL; 849 priv->survey = NULL; 850 ieee80211_free_hw(dev); 851 } 852 EXPORT_SYMBOL_GPL(p54_free_common); 853 854 void p54_unregister_common(struct ieee80211_hw *dev) 855 { 856 struct p54_common *priv = dev->priv; 857 858 if (priv->registered) { 859 priv->registered = false; 860 #ifdef CONFIG_P54_LEDS 861 p54_unregister_leds(priv); 862 #endif /* CONFIG_P54_LEDS */ 863 ieee80211_unregister_hw(dev); 864 } 865 866 mutex_destroy(&priv->conf_mutex); 867 mutex_destroy(&priv->eeprom_mutex); 868 } 869 EXPORT_SYMBOL_GPL(p54_unregister_common); 870