1 /* 2 * Atheros CARL9170 driver 3 * 4 * mac80211 interaction code 5 * 6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 7 * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; see the file COPYING. If not, see 21 * http://www.gnu.org/licenses/. 22 * 23 * This file incorporates work covered by the following copyright and 24 * permission notice: 25 * Copyright (c) 2007-2008 Atheros Communications, Inc. 26 * 27 * Permission to use, copy, modify, and/or distribute this software for any 28 * purpose with or without fee is hereby granted, provided that the above 29 * copyright notice and this permission notice appear in all copies. 30 * 31 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 32 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 33 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 34 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 35 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 36 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 37 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 38 */ 39 40 #include <linux/slab.h> 41 #include <linux/module.h> 42 #include <linux/etherdevice.h> 43 #include <linux/random.h> 44 #include <net/mac80211.h> 45 #include <net/cfg80211.h> 46 #include "hw.h" 47 #include "carl9170.h" 48 #include "cmd.h" 49 50 static bool modparam_nohwcrypt; 51 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); 52 MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload."); 53 54 int modparam_noht; 55 module_param_named(noht, modparam_noht, int, S_IRUGO); 56 MODULE_PARM_DESC(noht, "Disable MPDU aggregation."); 57 58 #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \ 59 .bitrate = (_bitrate), \ 60 .flags = (_flags), \ 61 .hw_value = (_hw_rate) | (_txpidx) << 4, \ 62 } 63 64 struct ieee80211_rate __carl9170_ratetable[] = { 65 RATE(10, 0, 0, 0), 66 RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE), 67 RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE), 68 RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE), 69 RATE(60, 0xb, 0, 0), 70 RATE(90, 0xf, 0, 0), 71 RATE(120, 0xa, 0, 0), 72 RATE(180, 0xe, 0, 0), 73 RATE(240, 0x9, 0, 0), 74 RATE(360, 0xd, 1, 0), 75 RATE(480, 0x8, 2, 0), 76 RATE(540, 0xc, 3, 0), 77 }; 78 #undef RATE 79 80 #define carl9170_g_ratetable (__carl9170_ratetable + 0) 81 #define carl9170_g_ratetable_size 12 82 #define carl9170_a_ratetable (__carl9170_ratetable + 4) 83 #define carl9170_a_ratetable_size 8 84 85 /* 86 * NB: The hw_value is used as an index into the carl9170_phy_freq_params 87 * array in phy.c so that we don't have to do frequency lookups! 88 */ 89 #define CHAN(_freq, _idx) { \ 90 .center_freq = (_freq), \ 91 .hw_value = (_idx), \ 92 .max_power = 18, /* XXX */ \ 93 } 94 95 static struct ieee80211_channel carl9170_2ghz_chantable[] = { 96 CHAN(2412, 0), 97 CHAN(2417, 1), 98 CHAN(2422, 2), 99 CHAN(2427, 3), 100 CHAN(2432, 4), 101 CHAN(2437, 5), 102 CHAN(2442, 6), 103 CHAN(2447, 7), 104 CHAN(2452, 8), 105 CHAN(2457, 9), 106 CHAN(2462, 10), 107 CHAN(2467, 11), 108 CHAN(2472, 12), 109 CHAN(2484, 13), 110 }; 111 112 static struct ieee80211_channel carl9170_5ghz_chantable[] = { 113 CHAN(4920, 14), 114 CHAN(4940, 15), 115 CHAN(4960, 16), 116 CHAN(4980, 17), 117 CHAN(5040, 18), 118 CHAN(5060, 19), 119 CHAN(5080, 20), 120 CHAN(5180, 21), 121 CHAN(5200, 22), 122 CHAN(5220, 23), 123 CHAN(5240, 24), 124 CHAN(5260, 25), 125 CHAN(5280, 26), 126 CHAN(5300, 27), 127 CHAN(5320, 28), 128 CHAN(5500, 29), 129 CHAN(5520, 30), 130 CHAN(5540, 31), 131 CHAN(5560, 32), 132 CHAN(5580, 33), 133 CHAN(5600, 34), 134 CHAN(5620, 35), 135 CHAN(5640, 36), 136 CHAN(5660, 37), 137 CHAN(5680, 38), 138 CHAN(5700, 39), 139 CHAN(5745, 40), 140 CHAN(5765, 41), 141 CHAN(5785, 42), 142 CHAN(5805, 43), 143 CHAN(5825, 44), 144 CHAN(5170, 45), 145 CHAN(5190, 46), 146 CHAN(5210, 47), 147 CHAN(5230, 48), 148 }; 149 #undef CHAN 150 151 #define CARL9170_HT_CAP \ 152 { \ 153 .ht_supported = true, \ 154 .cap = IEEE80211_HT_CAP_MAX_AMSDU | \ 155 IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \ 156 IEEE80211_HT_CAP_SGI_40 | \ 157 IEEE80211_HT_CAP_DSSSCCK40 | \ 158 IEEE80211_HT_CAP_SM_PS, \ 159 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K, \ 160 .ampdu_density = IEEE80211_HT_MPDU_DENSITY_8, \ 161 .mcs = { \ 162 .rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \ 163 .rx_highest = cpu_to_le16(300), \ 164 .tx_params = IEEE80211_HT_MCS_TX_DEFINED, \ 165 }, \ 166 } 167 168 static struct ieee80211_supported_band carl9170_band_2GHz = { 169 .channels = carl9170_2ghz_chantable, 170 .n_channels = ARRAY_SIZE(carl9170_2ghz_chantable), 171 .bitrates = carl9170_g_ratetable, 172 .n_bitrates = carl9170_g_ratetable_size, 173 .ht_cap = CARL9170_HT_CAP, 174 }; 175 176 static struct ieee80211_supported_band carl9170_band_5GHz = { 177 .channels = carl9170_5ghz_chantable, 178 .n_channels = ARRAY_SIZE(carl9170_5ghz_chantable), 179 .bitrates = carl9170_a_ratetable, 180 .n_bitrates = carl9170_a_ratetable_size, 181 .ht_cap = CARL9170_HT_CAP, 182 }; 183 184 static void carl9170_ampdu_gc(struct ar9170 *ar) 185 { 186 struct carl9170_sta_tid *tid_info; 187 LIST_HEAD(tid_gc); 188 189 rcu_read_lock(); 190 list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) { 191 spin_lock_bh(&ar->tx_ampdu_list_lock); 192 if (tid_info->state == CARL9170_TID_STATE_SHUTDOWN) { 193 tid_info->state = CARL9170_TID_STATE_KILLED; 194 list_del_rcu(&tid_info->list); 195 ar->tx_ampdu_list_len--; 196 list_add_tail(&tid_info->tmp_list, &tid_gc); 197 } 198 spin_unlock_bh(&ar->tx_ampdu_list_lock); 199 200 } 201 rcu_assign_pointer(ar->tx_ampdu_iter, tid_info); 202 rcu_read_unlock(); 203 204 synchronize_rcu(); 205 206 while (!list_empty(&tid_gc)) { 207 struct sk_buff *skb; 208 tid_info = list_first_entry(&tid_gc, struct carl9170_sta_tid, 209 tmp_list); 210 211 while ((skb = __skb_dequeue(&tid_info->queue))) 212 carl9170_tx_status(ar, skb, false); 213 214 list_del_init(&tid_info->tmp_list); 215 kfree(tid_info); 216 } 217 } 218 219 static void carl9170_flush(struct ar9170 *ar, bool drop_queued) 220 { 221 if (drop_queued) { 222 int i; 223 224 /* 225 * We can only drop frames which have not been uploaded 226 * to the device yet. 227 */ 228 229 for (i = 0; i < ar->hw->queues; i++) { 230 struct sk_buff *skb; 231 232 while ((skb = skb_dequeue(&ar->tx_pending[i]))) { 233 struct ieee80211_tx_info *info; 234 235 info = IEEE80211_SKB_CB(skb); 236 if (info->flags & IEEE80211_TX_CTL_AMPDU) 237 atomic_dec(&ar->tx_ampdu_upload); 238 239 carl9170_tx_status(ar, skb, false); 240 } 241 } 242 } 243 244 /* Wait for all other outstanding frames to timeout. */ 245 if (atomic_read(&ar->tx_total_queued)) 246 WARN_ON(wait_for_completion_timeout(&ar->tx_flush, HZ) == 0); 247 } 248 249 static void carl9170_flush_ba(struct ar9170 *ar) 250 { 251 struct sk_buff_head free; 252 struct carl9170_sta_tid *tid_info; 253 struct sk_buff *skb; 254 255 __skb_queue_head_init(&free); 256 257 rcu_read_lock(); 258 spin_lock_bh(&ar->tx_ampdu_list_lock); 259 list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) { 260 if (tid_info->state > CARL9170_TID_STATE_SUSPEND) { 261 tid_info->state = CARL9170_TID_STATE_SUSPEND; 262 263 spin_lock(&tid_info->lock); 264 while ((skb = __skb_dequeue(&tid_info->queue))) 265 __skb_queue_tail(&free, skb); 266 spin_unlock(&tid_info->lock); 267 } 268 } 269 spin_unlock_bh(&ar->tx_ampdu_list_lock); 270 rcu_read_unlock(); 271 272 while ((skb = __skb_dequeue(&free))) 273 carl9170_tx_status(ar, skb, false); 274 } 275 276 static void carl9170_zap_queues(struct ar9170 *ar) 277 { 278 struct carl9170_vif_info *cvif; 279 unsigned int i; 280 281 carl9170_ampdu_gc(ar); 282 283 carl9170_flush_ba(ar); 284 carl9170_flush(ar, true); 285 286 for (i = 0; i < ar->hw->queues; i++) { 287 spin_lock_bh(&ar->tx_status[i].lock); 288 while (!skb_queue_empty(&ar->tx_status[i])) { 289 struct sk_buff *skb; 290 291 skb = skb_peek(&ar->tx_status[i]); 292 carl9170_tx_get_skb(skb); 293 spin_unlock_bh(&ar->tx_status[i].lock); 294 carl9170_tx_drop(ar, skb); 295 spin_lock_bh(&ar->tx_status[i].lock); 296 carl9170_tx_put_skb(skb); 297 } 298 spin_unlock_bh(&ar->tx_status[i].lock); 299 } 300 301 BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_SOFT < 1); 302 BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD < CARL9170_NUM_TX_LIMIT_SOFT); 303 BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD >= CARL9170_BAW_BITS); 304 305 /* reinitialize queues statistics */ 306 memset(&ar->tx_stats, 0, sizeof(ar->tx_stats)); 307 for (i = 0; i < ar->hw->queues; i++) 308 ar->tx_stats[i].limit = CARL9170_NUM_TX_LIMIT_HARD; 309 310 for (i = 0; i < DIV_ROUND_UP(ar->fw.mem_blocks, BITS_PER_LONG); i++) 311 ar->mem_bitmap[i] = 0; 312 313 rcu_read_lock(); 314 list_for_each_entry_rcu(cvif, &ar->vif_list, list) { 315 spin_lock_bh(&ar->beacon_lock); 316 dev_kfree_skb_any(cvif->beacon); 317 cvif->beacon = NULL; 318 spin_unlock_bh(&ar->beacon_lock); 319 } 320 rcu_read_unlock(); 321 322 atomic_set(&ar->tx_ampdu_upload, 0); 323 atomic_set(&ar->tx_ampdu_scheduler, 0); 324 atomic_set(&ar->tx_total_pending, 0); 325 atomic_set(&ar->tx_total_queued, 0); 326 atomic_set(&ar->mem_free_blocks, ar->fw.mem_blocks); 327 } 328 329 #define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \ 330 do { \ 331 queue.aifs = ai_fs; \ 332 queue.cw_min = cwmin; \ 333 queue.cw_max = cwmax; \ 334 queue.txop = _txop; \ 335 } while (0) 336 337 static int carl9170_op_start(struct ieee80211_hw *hw) 338 { 339 struct ar9170 *ar = hw->priv; 340 int err, i; 341 342 mutex_lock(&ar->mutex); 343 344 carl9170_zap_queues(ar); 345 346 /* reset QoS defaults */ 347 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VO], 2, 3, 7, 47); 348 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VI], 2, 7, 15, 94); 349 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BE], 3, 15, 1023, 0); 350 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BK], 7, 15, 1023, 0); 351 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_SPECIAL], 2, 3, 7, 0); 352 353 ar->current_factor = ar->current_density = -1; 354 /* "The first key is unique." */ 355 ar->usedkeys = 1; 356 ar->filter_state = 0; 357 ar->ps.last_action = jiffies; 358 ar->ps.last_slept = jiffies; 359 ar->erp_mode = CARL9170_ERP_AUTO; 360 361 /* Set "disable hw crypto offload" whenever the module parameter 362 * nohwcrypt is true or if the firmware does not support it. 363 */ 364 ar->disable_offload = modparam_nohwcrypt | 365 ar->fw.disable_offload_fw; 366 ar->rx_software_decryption = ar->disable_offload; 367 368 for (i = 0; i < ar->hw->queues; i++) { 369 ar->queue_stop_timeout[i] = jiffies; 370 ar->max_queue_stop_timeout[i] = 0; 371 } 372 373 atomic_set(&ar->mem_allocs, 0); 374 375 err = carl9170_usb_open(ar); 376 if (err) 377 goto out; 378 379 err = carl9170_init_mac(ar); 380 if (err) 381 goto out; 382 383 err = carl9170_set_qos(ar); 384 if (err) 385 goto out; 386 387 if (ar->fw.rx_filter) { 388 err = carl9170_rx_filter(ar, CARL9170_RX_FILTER_OTHER_RA | 389 CARL9170_RX_FILTER_CTL_OTHER | CARL9170_RX_FILTER_BAD); 390 if (err) 391 goto out; 392 } 393 394 err = carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 395 AR9170_DMA_TRIGGER_RXQ); 396 if (err) 397 goto out; 398 399 /* Clear key-cache */ 400 for (i = 0; i < AR9170_CAM_MAX_USER + 4; i++) { 401 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE, 402 0, NULL, 0); 403 if (err) 404 goto out; 405 406 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE, 407 1, NULL, 0); 408 if (err) 409 goto out; 410 411 if (i < AR9170_CAM_MAX_USER) { 412 err = carl9170_disable_key(ar, i); 413 if (err) 414 goto out; 415 } 416 } 417 418 carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED); 419 420 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, 421 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); 422 423 ieee80211_wake_queues(ar->hw); 424 err = 0; 425 426 out: 427 mutex_unlock(&ar->mutex); 428 return err; 429 } 430 431 static void carl9170_cancel_worker(struct ar9170 *ar) 432 { 433 cancel_delayed_work_sync(&ar->stat_work); 434 cancel_delayed_work_sync(&ar->tx_janitor); 435 #ifdef CONFIG_CARL9170_LEDS 436 cancel_delayed_work_sync(&ar->led_work); 437 #endif /* CONFIG_CARL9170_LEDS */ 438 cancel_work_sync(&ar->ps_work); 439 cancel_work_sync(&ar->ping_work); 440 cancel_work_sync(&ar->ampdu_work); 441 } 442 443 static void carl9170_op_stop(struct ieee80211_hw *hw) 444 { 445 struct ar9170 *ar = hw->priv; 446 447 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE); 448 449 ieee80211_stop_queues(ar->hw); 450 451 mutex_lock(&ar->mutex); 452 if (IS_ACCEPTING_CMD(ar)) { 453 RCU_INIT_POINTER(ar->beacon_iter, NULL); 454 455 carl9170_led_set_state(ar, 0); 456 457 /* stop DMA */ 458 carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0); 459 carl9170_usb_stop(ar); 460 } 461 462 carl9170_zap_queues(ar); 463 mutex_unlock(&ar->mutex); 464 465 carl9170_cancel_worker(ar); 466 } 467 468 static void carl9170_restart_work(struct work_struct *work) 469 { 470 struct ar9170 *ar = container_of(work, struct ar9170, 471 restart_work); 472 int err = -EIO; 473 474 ar->usedkeys = 0; 475 ar->filter_state = 0; 476 carl9170_cancel_worker(ar); 477 478 mutex_lock(&ar->mutex); 479 if (!ar->force_usb_reset) { 480 err = carl9170_usb_restart(ar); 481 if (net_ratelimit()) { 482 if (err) 483 dev_err(&ar->udev->dev, "Failed to restart device (%d).\n", err); 484 else 485 dev_info(&ar->udev->dev, "device restarted successfully.\n"); 486 } 487 } 488 carl9170_zap_queues(ar); 489 mutex_unlock(&ar->mutex); 490 491 if (!err && !ar->force_usb_reset) { 492 ar->restart_counter++; 493 atomic_set(&ar->pending_restarts, 0); 494 495 ieee80211_restart_hw(ar->hw); 496 } else { 497 /* 498 * The reset was unsuccessful and the device seems to 499 * be dead. But there's still one option: a low-level 500 * usb subsystem reset... 501 */ 502 503 carl9170_usb_reset(ar); 504 } 505 } 506 507 void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r) 508 { 509 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE); 510 511 /* 512 * Sometimes, an error can trigger several different reset events. 513 * By ignoring these *surplus* reset events, the device won't be 514 * killed again, right after it has recovered. 515 */ 516 if (atomic_inc_return(&ar->pending_restarts) > 1) { 517 dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r); 518 return; 519 } 520 521 ieee80211_stop_queues(ar->hw); 522 523 dev_err(&ar->udev->dev, "restart device (%d)\n", r); 524 525 if (!WARN_ON(r == CARL9170_RR_NO_REASON) || 526 !WARN_ON(r >= __CARL9170_RR_LAST)) 527 ar->last_reason = r; 528 529 if (!ar->registered) 530 return; 531 532 if (!IS_ACCEPTING_CMD(ar) || ar->needs_full_reset) 533 ar->force_usb_reset = true; 534 535 ieee80211_queue_work(ar->hw, &ar->restart_work); 536 537 /* 538 * At this point, the device instance might have vanished/disabled. 539 * So, don't put any code which access the ar9170 struct 540 * without proper protection. 541 */ 542 } 543 544 static void carl9170_ping_work(struct work_struct *work) 545 { 546 struct ar9170 *ar = container_of(work, struct ar9170, ping_work); 547 int err; 548 549 if (!IS_STARTED(ar)) 550 return; 551 552 mutex_lock(&ar->mutex); 553 err = carl9170_echo_test(ar, 0xdeadbeef); 554 if (err) 555 carl9170_restart(ar, CARL9170_RR_UNRESPONSIVE_DEVICE); 556 mutex_unlock(&ar->mutex); 557 } 558 559 static int carl9170_init_interface(struct ar9170 *ar, 560 struct ieee80211_vif *vif) 561 { 562 struct ath_common *common = &ar->common; 563 int err; 564 565 if (!vif) { 566 WARN_ON_ONCE(IS_STARTED(ar)); 567 return 0; 568 } 569 570 memcpy(common->macaddr, vif->addr, ETH_ALEN); 571 572 /* We have to fall back to software crypto, whenever 573 * the user choose to participates in an IBSS. HW 574 * offload for IBSS RSN is not supported by this driver. 575 * 576 * NOTE: If the previous main interface has already 577 * disabled hw crypto offload, we have to keep this 578 * previous disable_offload setting as it was. 579 * Altough ideally, we should notify mac80211 and tell 580 * it to forget about any HW crypto offload for now. 581 */ 582 ar->disable_offload |= ((vif->type != NL80211_IFTYPE_STATION) && 583 (vif->type != NL80211_IFTYPE_AP)); 584 585 /* While the driver supports HW offload in a single 586 * P2P client configuration, it doesn't support HW 587 * offload in the favourit, concurrent P2P GO+CLIENT 588 * configuration. Hence, HW offload will always be 589 * disabled for P2P. 590 */ 591 ar->disable_offload |= vif->p2p; 592 593 ar->rx_software_decryption = ar->disable_offload; 594 595 err = carl9170_set_operating_mode(ar); 596 return err; 597 } 598 599 static int carl9170_op_add_interface(struct ieee80211_hw *hw, 600 struct ieee80211_vif *vif) 601 { 602 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv; 603 struct ieee80211_vif *main_vif, *old_main = NULL; 604 struct ar9170 *ar = hw->priv; 605 int vif_id = -1, err = 0; 606 607 mutex_lock(&ar->mutex); 608 rcu_read_lock(); 609 if (vif_priv->active) { 610 /* 611 * Skip the interface structure initialization, 612 * if the vif survived the _restart call. 613 */ 614 vif_id = vif_priv->id; 615 vif_priv->enable_beacon = false; 616 617 spin_lock_bh(&ar->beacon_lock); 618 dev_kfree_skb_any(vif_priv->beacon); 619 vif_priv->beacon = NULL; 620 spin_unlock_bh(&ar->beacon_lock); 621 622 goto init; 623 } 624 625 /* Because the AR9170 HW's MAC doesn't provide full support for 626 * multiple, independent interfaces [of different operation modes]. 627 * We have to select ONE main interface [main mode of HW], but we 628 * can have multiple slaves [AKA: entry in the ACK-table]. 629 * 630 * The first (from HEAD/TOP) interface in the ar->vif_list is 631 * always the main intf. All following intfs in this list 632 * are considered to be slave intfs. 633 */ 634 main_vif = carl9170_get_main_vif(ar); 635 636 if (main_vif) { 637 switch (main_vif->type) { 638 case NL80211_IFTYPE_STATION: 639 if (vif->type == NL80211_IFTYPE_STATION) 640 break; 641 642 /* P2P GO [master] use-case 643 * Because the P2P GO station is selected dynamically 644 * by all participating peers of a WIFI Direct network, 645 * the driver has be able to change the main interface 646 * operating mode on the fly. 647 */ 648 if (main_vif->p2p && vif->p2p && 649 vif->type == NL80211_IFTYPE_AP) { 650 old_main = main_vif; 651 break; 652 } 653 654 err = -EBUSY; 655 rcu_read_unlock(); 656 657 goto unlock; 658 659 case NL80211_IFTYPE_MESH_POINT: 660 case NL80211_IFTYPE_AP: 661 if ((vif->type == NL80211_IFTYPE_STATION) || 662 (vif->type == NL80211_IFTYPE_WDS) || 663 (vif->type == NL80211_IFTYPE_AP) || 664 (vif->type == NL80211_IFTYPE_MESH_POINT)) 665 break; 666 667 err = -EBUSY; 668 rcu_read_unlock(); 669 goto unlock; 670 671 default: 672 rcu_read_unlock(); 673 goto unlock; 674 } 675 } 676 677 vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0); 678 679 if (vif_id < 0) { 680 rcu_read_unlock(); 681 682 err = -ENOSPC; 683 goto unlock; 684 } 685 686 BUG_ON(ar->vif_priv[vif_id].id != vif_id); 687 688 vif_priv->active = true; 689 vif_priv->id = vif_id; 690 vif_priv->enable_beacon = false; 691 ar->vifs++; 692 if (old_main) { 693 /* We end up in here, if the main interface is being replaced. 694 * Put the new main interface at the HEAD of the list and the 695 * previous inteface will automatically become second in line. 696 */ 697 list_add_rcu(&vif_priv->list, &ar->vif_list); 698 } else { 699 /* Add new inteface. If the list is empty, it will become the 700 * main inteface, otherwise it will be slave. 701 */ 702 list_add_tail_rcu(&vif_priv->list, &ar->vif_list); 703 } 704 rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif); 705 706 init: 707 main_vif = carl9170_get_main_vif(ar); 708 709 if (main_vif == vif) { 710 rcu_assign_pointer(ar->beacon_iter, vif_priv); 711 rcu_read_unlock(); 712 713 if (old_main) { 714 struct carl9170_vif_info *old_main_priv = 715 (void *) old_main->drv_priv; 716 /* downgrade old main intf to slave intf. 717 * NOTE: We are no longer under rcu_read_lock. 718 * But we are still holding ar->mutex, so the 719 * vif data [id, addr] is safe. 720 */ 721 err = carl9170_mod_virtual_mac(ar, old_main_priv->id, 722 old_main->addr); 723 if (err) 724 goto unlock; 725 } 726 727 err = carl9170_init_interface(ar, vif); 728 if (err) 729 goto unlock; 730 } else { 731 rcu_read_unlock(); 732 err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr); 733 734 if (err) 735 goto unlock; 736 } 737 738 if (ar->fw.tx_seq_table) { 739 err = carl9170_write_reg(ar, ar->fw.tx_seq_table + vif_id * 4, 740 0); 741 if (err) 742 goto unlock; 743 } 744 745 unlock: 746 if (err && (vif_id >= 0)) { 747 vif_priv->active = false; 748 bitmap_release_region(&ar->vif_bitmap, vif_id, 0); 749 ar->vifs--; 750 RCU_INIT_POINTER(ar->vif_priv[vif_id].vif, NULL); 751 list_del_rcu(&vif_priv->list); 752 mutex_unlock(&ar->mutex); 753 synchronize_rcu(); 754 } else { 755 if (ar->vifs > 1) 756 ar->ps.off_override |= PS_OFF_VIF; 757 758 mutex_unlock(&ar->mutex); 759 } 760 761 return err; 762 } 763 764 static void carl9170_op_remove_interface(struct ieee80211_hw *hw, 765 struct ieee80211_vif *vif) 766 { 767 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv; 768 struct ieee80211_vif *main_vif; 769 struct ar9170 *ar = hw->priv; 770 unsigned int id; 771 772 mutex_lock(&ar->mutex); 773 774 if (WARN_ON_ONCE(!vif_priv->active)) 775 goto unlock; 776 777 ar->vifs--; 778 779 rcu_read_lock(); 780 main_vif = carl9170_get_main_vif(ar); 781 782 id = vif_priv->id; 783 784 vif_priv->active = false; 785 WARN_ON(vif_priv->enable_beacon); 786 vif_priv->enable_beacon = false; 787 list_del_rcu(&vif_priv->list); 788 RCU_INIT_POINTER(ar->vif_priv[id].vif, NULL); 789 790 if (vif == main_vif) { 791 rcu_read_unlock(); 792 793 if (ar->vifs) { 794 WARN_ON(carl9170_init_interface(ar, 795 carl9170_get_main_vif(ar))); 796 } else { 797 carl9170_set_operating_mode(ar); 798 } 799 } else { 800 rcu_read_unlock(); 801 802 WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL)); 803 } 804 805 carl9170_update_beacon(ar, false); 806 carl9170_flush_cab(ar, id); 807 808 spin_lock_bh(&ar->beacon_lock); 809 dev_kfree_skb_any(vif_priv->beacon); 810 vif_priv->beacon = NULL; 811 spin_unlock_bh(&ar->beacon_lock); 812 813 bitmap_release_region(&ar->vif_bitmap, id, 0); 814 815 carl9170_set_beacon_timers(ar); 816 817 if (ar->vifs == 1) 818 ar->ps.off_override &= ~PS_OFF_VIF; 819 820 unlock: 821 mutex_unlock(&ar->mutex); 822 823 synchronize_rcu(); 824 } 825 826 void carl9170_ps_check(struct ar9170 *ar) 827 { 828 ieee80211_queue_work(ar->hw, &ar->ps_work); 829 } 830 831 /* caller must hold ar->mutex */ 832 static int carl9170_ps_update(struct ar9170 *ar) 833 { 834 bool ps = false; 835 int err = 0; 836 837 if (!ar->ps.off_override) 838 ps = (ar->hw->conf.flags & IEEE80211_CONF_PS); 839 840 if (ps != ar->ps.state) { 841 err = carl9170_powersave(ar, ps); 842 if (err) 843 return err; 844 845 if (ar->ps.state && !ps) { 846 ar->ps.sleep_ms = jiffies_to_msecs(jiffies - 847 ar->ps.last_action); 848 } 849 850 if (ps) 851 ar->ps.last_slept = jiffies; 852 853 ar->ps.last_action = jiffies; 854 ar->ps.state = ps; 855 } 856 857 return 0; 858 } 859 860 static void carl9170_ps_work(struct work_struct *work) 861 { 862 struct ar9170 *ar = container_of(work, struct ar9170, 863 ps_work); 864 mutex_lock(&ar->mutex); 865 if (IS_STARTED(ar)) 866 WARN_ON_ONCE(carl9170_ps_update(ar) != 0); 867 mutex_unlock(&ar->mutex); 868 } 869 870 static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise) 871 { 872 int err; 873 874 if (noise) { 875 err = carl9170_get_noisefloor(ar); 876 if (err) 877 return err; 878 } 879 880 if (ar->fw.hw_counters) { 881 err = carl9170_collect_tally(ar); 882 if (err) 883 return err; 884 } 885 886 if (flush) 887 memset(&ar->tally, 0, sizeof(ar->tally)); 888 889 return 0; 890 } 891 892 static void carl9170_stat_work(struct work_struct *work) 893 { 894 struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work); 895 int err; 896 897 mutex_lock(&ar->mutex); 898 err = carl9170_update_survey(ar, false, true); 899 mutex_unlock(&ar->mutex); 900 901 if (err) 902 return; 903 904 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, 905 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); 906 } 907 908 static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed) 909 { 910 struct ar9170 *ar = hw->priv; 911 int err = 0; 912 913 mutex_lock(&ar->mutex); 914 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) { 915 /* TODO */ 916 err = 0; 917 } 918 919 if (changed & IEEE80211_CONF_CHANGE_PS) { 920 err = carl9170_ps_update(ar); 921 if (err) 922 goto out; 923 } 924 925 if (changed & IEEE80211_CONF_CHANGE_SMPS) { 926 /* TODO */ 927 err = 0; 928 } 929 930 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { 931 enum nl80211_channel_type channel_type = 932 cfg80211_get_chandef_type(&hw->conf.chandef); 933 934 /* adjust slot time for 5 GHz */ 935 err = carl9170_set_slot_time(ar); 936 if (err) 937 goto out; 938 939 err = carl9170_update_survey(ar, true, false); 940 if (err) 941 goto out; 942 943 err = carl9170_set_channel(ar, hw->conf.chandef.chan, 944 channel_type); 945 if (err) 946 goto out; 947 948 err = carl9170_update_survey(ar, false, true); 949 if (err) 950 goto out; 951 952 err = carl9170_set_dyn_sifs_ack(ar); 953 if (err) 954 goto out; 955 956 err = carl9170_set_rts_cts_rate(ar); 957 if (err) 958 goto out; 959 } 960 961 if (changed & IEEE80211_CONF_CHANGE_POWER) { 962 err = carl9170_set_mac_tpc(ar, ar->hw->conf.chandef.chan); 963 if (err) 964 goto out; 965 } 966 967 out: 968 mutex_unlock(&ar->mutex); 969 return err; 970 } 971 972 static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw, 973 struct netdev_hw_addr_list *mc_list) 974 { 975 struct netdev_hw_addr *ha; 976 u64 mchash; 977 978 /* always get broadcast frames */ 979 mchash = 1ULL << (0xff >> 2); 980 981 netdev_hw_addr_list_for_each(ha, mc_list) 982 mchash |= 1ULL << (ha->addr[5] >> 2); 983 984 return mchash; 985 } 986 987 static void carl9170_op_configure_filter(struct ieee80211_hw *hw, 988 unsigned int changed_flags, 989 unsigned int *new_flags, 990 u64 multicast) 991 { 992 struct ar9170 *ar = hw->priv; 993 994 /* mask supported flags */ 995 *new_flags &= FIF_ALLMULTI | ar->rx_filter_caps; 996 997 if (!IS_ACCEPTING_CMD(ar)) 998 return; 999 1000 mutex_lock(&ar->mutex); 1001 1002 ar->filter_state = *new_flags; 1003 /* 1004 * We can support more by setting the sniffer bit and 1005 * then checking the error flags, later. 1006 */ 1007 1008 if (*new_flags & FIF_ALLMULTI) 1009 multicast = ~0ULL; 1010 1011 if (multicast != ar->cur_mc_hash) 1012 WARN_ON(carl9170_update_multicast(ar, multicast)); 1013 1014 if (changed_flags & FIF_OTHER_BSS) { 1015 ar->sniffer_enabled = !!(*new_flags & FIF_OTHER_BSS); 1016 1017 WARN_ON(carl9170_set_operating_mode(ar)); 1018 } 1019 1020 if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) { 1021 u32 rx_filter = 0; 1022 1023 if (!ar->fw.ba_filter) 1024 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER; 1025 1026 if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))) 1027 rx_filter |= CARL9170_RX_FILTER_BAD; 1028 1029 if (!(*new_flags & FIF_CONTROL)) 1030 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER; 1031 1032 if (!(*new_flags & FIF_PSPOLL)) 1033 rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL; 1034 1035 if (!(*new_flags & FIF_OTHER_BSS)) { 1036 rx_filter |= CARL9170_RX_FILTER_OTHER_RA; 1037 rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL; 1038 } 1039 1040 WARN_ON(carl9170_rx_filter(ar, rx_filter)); 1041 } 1042 1043 mutex_unlock(&ar->mutex); 1044 } 1045 1046 1047 static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw, 1048 struct ieee80211_vif *vif, 1049 struct ieee80211_bss_conf *bss_conf, 1050 u32 changed) 1051 { 1052 struct ar9170 *ar = hw->priv; 1053 struct ath_common *common = &ar->common; 1054 int err = 0; 1055 struct carl9170_vif_info *vif_priv; 1056 struct ieee80211_vif *main_vif; 1057 1058 mutex_lock(&ar->mutex); 1059 vif_priv = (void *) vif->drv_priv; 1060 main_vif = carl9170_get_main_vif(ar); 1061 if (WARN_ON(!main_vif)) 1062 goto out; 1063 1064 if (changed & BSS_CHANGED_BEACON_ENABLED) { 1065 struct carl9170_vif_info *iter; 1066 int i = 0; 1067 1068 vif_priv->enable_beacon = bss_conf->enable_beacon; 1069 rcu_read_lock(); 1070 list_for_each_entry_rcu(iter, &ar->vif_list, list) { 1071 if (iter->active && iter->enable_beacon) 1072 i++; 1073 1074 } 1075 rcu_read_unlock(); 1076 1077 ar->beacon_enabled = i; 1078 } 1079 1080 if (changed & BSS_CHANGED_BEACON) { 1081 err = carl9170_update_beacon(ar, false); 1082 if (err) 1083 goto out; 1084 } 1085 1086 if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON | 1087 BSS_CHANGED_BEACON_INT)) { 1088 1089 if (main_vif != vif) { 1090 bss_conf->beacon_int = main_vif->bss_conf.beacon_int; 1091 bss_conf->dtim_period = main_vif->bss_conf.dtim_period; 1092 } 1093 1094 /* 1095 * Therefore a hard limit for the broadcast traffic should 1096 * prevent false alarms. 1097 */ 1098 if (vif->type != NL80211_IFTYPE_STATION && 1099 (bss_conf->beacon_int * bss_conf->dtim_period >= 1100 (CARL9170_QUEUE_STUCK_TIMEOUT / 2))) { 1101 err = -EINVAL; 1102 goto out; 1103 } 1104 1105 err = carl9170_set_beacon_timers(ar); 1106 if (err) 1107 goto out; 1108 } 1109 1110 if (changed & BSS_CHANGED_HT) { 1111 /* TODO */ 1112 err = 0; 1113 if (err) 1114 goto out; 1115 } 1116 1117 if (main_vif != vif) 1118 goto out; 1119 1120 /* 1121 * The following settings can only be changed by the 1122 * master interface. 1123 */ 1124 1125 if (changed & BSS_CHANGED_BSSID) { 1126 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); 1127 err = carl9170_set_operating_mode(ar); 1128 if (err) 1129 goto out; 1130 } 1131 1132 if (changed & BSS_CHANGED_ASSOC) { 1133 ar->common.curaid = bss_conf->aid; 1134 err = carl9170_set_beacon_timers(ar); 1135 if (err) 1136 goto out; 1137 } 1138 1139 if (changed & BSS_CHANGED_ERP_SLOT) { 1140 err = carl9170_set_slot_time(ar); 1141 if (err) 1142 goto out; 1143 } 1144 1145 if (changed & BSS_CHANGED_BASIC_RATES) { 1146 err = carl9170_set_mac_rates(ar); 1147 if (err) 1148 goto out; 1149 } 1150 1151 out: 1152 WARN_ON_ONCE(err && IS_STARTED(ar)); 1153 mutex_unlock(&ar->mutex); 1154 } 1155 1156 static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw, 1157 struct ieee80211_vif *vif) 1158 { 1159 struct ar9170 *ar = hw->priv; 1160 struct carl9170_tsf_rsp tsf; 1161 int err; 1162 1163 mutex_lock(&ar->mutex); 1164 err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF, 1165 0, NULL, sizeof(tsf), &tsf); 1166 mutex_unlock(&ar->mutex); 1167 if (WARN_ON(err)) 1168 return 0; 1169 1170 return le64_to_cpu(tsf.tsf_64); 1171 } 1172 1173 static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1174 struct ieee80211_vif *vif, 1175 struct ieee80211_sta *sta, 1176 struct ieee80211_key_conf *key) 1177 { 1178 struct ar9170 *ar = hw->priv; 1179 int err = 0, i; 1180 u8 ktype; 1181 1182 if (ar->disable_offload || !vif) 1183 return -EOPNOTSUPP; 1184 1185 /* Fall back to software encryption whenever the driver is connected 1186 * to more than one network. 1187 * 1188 * This is very unfortunate, because some machines cannot handle 1189 * the high througput speed in 802.11n networks. 1190 */ 1191 1192 if (!is_main_vif(ar, vif)) { 1193 mutex_lock(&ar->mutex); 1194 goto err_softw; 1195 } 1196 1197 /* 1198 * While the hardware supports *catch-all* key, for offloading 1199 * group-key en-/de-cryption. The way of how the hardware 1200 * decides which keyId maps to which key, remains a mystery... 1201 */ 1202 if ((vif->type != NL80211_IFTYPE_STATION && 1203 vif->type != NL80211_IFTYPE_ADHOC) && 1204 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) 1205 return -EOPNOTSUPP; 1206 1207 switch (key->cipher) { 1208 case WLAN_CIPHER_SUITE_WEP40: 1209 ktype = AR9170_ENC_ALG_WEP64; 1210 break; 1211 case WLAN_CIPHER_SUITE_WEP104: 1212 ktype = AR9170_ENC_ALG_WEP128; 1213 break; 1214 case WLAN_CIPHER_SUITE_TKIP: 1215 ktype = AR9170_ENC_ALG_TKIP; 1216 break; 1217 case WLAN_CIPHER_SUITE_CCMP: 1218 ktype = AR9170_ENC_ALG_AESCCMP; 1219 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX; 1220 break; 1221 default: 1222 return -EOPNOTSUPP; 1223 } 1224 1225 mutex_lock(&ar->mutex); 1226 if (cmd == SET_KEY) { 1227 if (!IS_STARTED(ar)) { 1228 err = -EOPNOTSUPP; 1229 goto out; 1230 } 1231 1232 if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 1233 sta = NULL; 1234 1235 i = 64 + key->keyidx; 1236 } else { 1237 for (i = 0; i < 64; i++) 1238 if (!(ar->usedkeys & BIT(i))) 1239 break; 1240 if (i == 64) 1241 goto err_softw; 1242 } 1243 1244 key->hw_key_idx = i; 1245 1246 err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL, 1247 ktype, 0, key->key, 1248 min_t(u8, 16, key->keylen)); 1249 if (err) 1250 goto out; 1251 1252 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { 1253 err = carl9170_upload_key(ar, i, sta ? sta->addr : 1254 NULL, ktype, 1, 1255 key->key + 16, 16); 1256 if (err) 1257 goto out; 1258 1259 /* 1260 * hardware is not capable generating MMIC 1261 * of fragmented frames! 1262 */ 1263 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 1264 } 1265 1266 if (i < 64) 1267 ar->usedkeys |= BIT(i); 1268 1269 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 1270 } else { 1271 if (!IS_STARTED(ar)) { 1272 /* The device is gone... together with the key ;-) */ 1273 err = 0; 1274 goto out; 1275 } 1276 1277 if (key->hw_key_idx < 64) { 1278 ar->usedkeys &= ~BIT(key->hw_key_idx); 1279 } else { 1280 err = carl9170_upload_key(ar, key->hw_key_idx, NULL, 1281 AR9170_ENC_ALG_NONE, 0, 1282 NULL, 0); 1283 if (err) 1284 goto out; 1285 1286 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { 1287 err = carl9170_upload_key(ar, key->hw_key_idx, 1288 NULL, 1289 AR9170_ENC_ALG_NONE, 1290 1, NULL, 0); 1291 if (err) 1292 goto out; 1293 } 1294 1295 } 1296 1297 err = carl9170_disable_key(ar, key->hw_key_idx); 1298 if (err) 1299 goto out; 1300 } 1301 1302 out: 1303 mutex_unlock(&ar->mutex); 1304 return err; 1305 1306 err_softw: 1307 if (!ar->rx_software_decryption) { 1308 ar->rx_software_decryption = true; 1309 carl9170_set_operating_mode(ar); 1310 } 1311 mutex_unlock(&ar->mutex); 1312 return -ENOSPC; 1313 } 1314 1315 static int carl9170_op_sta_add(struct ieee80211_hw *hw, 1316 struct ieee80211_vif *vif, 1317 struct ieee80211_sta *sta) 1318 { 1319 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; 1320 unsigned int i; 1321 1322 atomic_set(&sta_info->pending_frames, 0); 1323 1324 if (sta->ht_cap.ht_supported) { 1325 if (sta->ht_cap.ampdu_density > 6) { 1326 /* 1327 * HW does support 16us AMPDU density. 1328 * No HT-Xmit for station. 1329 */ 1330 1331 return 0; 1332 } 1333 1334 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) 1335 RCU_INIT_POINTER(sta_info->agg[i], NULL); 1336 1337 sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor); 1338 sta_info->ht_sta = true; 1339 } 1340 1341 return 0; 1342 } 1343 1344 static int carl9170_op_sta_remove(struct ieee80211_hw *hw, 1345 struct ieee80211_vif *vif, 1346 struct ieee80211_sta *sta) 1347 { 1348 struct ar9170 *ar = hw->priv; 1349 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; 1350 unsigned int i; 1351 bool cleanup = false; 1352 1353 if (sta->ht_cap.ht_supported) { 1354 1355 sta_info->ht_sta = false; 1356 1357 rcu_read_lock(); 1358 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) { 1359 struct carl9170_sta_tid *tid_info; 1360 1361 tid_info = rcu_dereference(sta_info->agg[i]); 1362 RCU_INIT_POINTER(sta_info->agg[i], NULL); 1363 1364 if (!tid_info) 1365 continue; 1366 1367 spin_lock_bh(&ar->tx_ampdu_list_lock); 1368 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN) 1369 tid_info->state = CARL9170_TID_STATE_SHUTDOWN; 1370 spin_unlock_bh(&ar->tx_ampdu_list_lock); 1371 cleanup = true; 1372 } 1373 rcu_read_unlock(); 1374 1375 if (cleanup) 1376 carl9170_ampdu_gc(ar); 1377 } 1378 1379 return 0; 1380 } 1381 1382 static int carl9170_op_conf_tx(struct ieee80211_hw *hw, 1383 struct ieee80211_vif *vif, u16 queue, 1384 const struct ieee80211_tx_queue_params *param) 1385 { 1386 struct ar9170 *ar = hw->priv; 1387 int ret; 1388 1389 mutex_lock(&ar->mutex); 1390 if (queue < ar->hw->queues) { 1391 memcpy(&ar->edcf[ar9170_qmap[queue]], param, sizeof(*param)); 1392 ret = carl9170_set_qos(ar); 1393 } else { 1394 ret = -EINVAL; 1395 } 1396 1397 mutex_unlock(&ar->mutex); 1398 return ret; 1399 } 1400 1401 static void carl9170_ampdu_work(struct work_struct *work) 1402 { 1403 struct ar9170 *ar = container_of(work, struct ar9170, 1404 ampdu_work); 1405 1406 if (!IS_STARTED(ar)) 1407 return; 1408 1409 mutex_lock(&ar->mutex); 1410 carl9170_ampdu_gc(ar); 1411 mutex_unlock(&ar->mutex); 1412 } 1413 1414 static int carl9170_op_ampdu_action(struct ieee80211_hw *hw, 1415 struct ieee80211_vif *vif, 1416 enum ieee80211_ampdu_mlme_action action, 1417 struct ieee80211_sta *sta, 1418 u16 tid, u16 *ssn, u8 buf_size, bool amsdu) 1419 { 1420 struct ar9170 *ar = hw->priv; 1421 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; 1422 struct carl9170_sta_tid *tid_info; 1423 1424 if (modparam_noht) 1425 return -EOPNOTSUPP; 1426 1427 switch (action) { 1428 case IEEE80211_AMPDU_TX_START: 1429 if (!sta_info->ht_sta) 1430 return -EOPNOTSUPP; 1431 1432 tid_info = kzalloc(sizeof(struct carl9170_sta_tid), 1433 GFP_ATOMIC); 1434 if (!tid_info) 1435 return -ENOMEM; 1436 1437 tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn); 1438 tid_info->state = CARL9170_TID_STATE_PROGRESS; 1439 tid_info->tid = tid; 1440 tid_info->max = sta_info->ampdu_max_len; 1441 tid_info->sta = sta; 1442 tid_info->vif = vif; 1443 1444 INIT_LIST_HEAD(&tid_info->list); 1445 INIT_LIST_HEAD(&tid_info->tmp_list); 1446 skb_queue_head_init(&tid_info->queue); 1447 spin_lock_init(&tid_info->lock); 1448 1449 spin_lock_bh(&ar->tx_ampdu_list_lock); 1450 ar->tx_ampdu_list_len++; 1451 list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list); 1452 rcu_assign_pointer(sta_info->agg[tid], tid_info); 1453 spin_unlock_bh(&ar->tx_ampdu_list_lock); 1454 1455 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1456 break; 1457 1458 case IEEE80211_AMPDU_TX_STOP_CONT: 1459 case IEEE80211_AMPDU_TX_STOP_FLUSH: 1460 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 1461 rcu_read_lock(); 1462 tid_info = rcu_dereference(sta_info->agg[tid]); 1463 if (tid_info) { 1464 spin_lock_bh(&ar->tx_ampdu_list_lock); 1465 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN) 1466 tid_info->state = CARL9170_TID_STATE_SHUTDOWN; 1467 spin_unlock_bh(&ar->tx_ampdu_list_lock); 1468 } 1469 1470 RCU_INIT_POINTER(sta_info->agg[tid], NULL); 1471 rcu_read_unlock(); 1472 1473 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1474 ieee80211_queue_work(ar->hw, &ar->ampdu_work); 1475 break; 1476 1477 case IEEE80211_AMPDU_TX_OPERATIONAL: 1478 rcu_read_lock(); 1479 tid_info = rcu_dereference(sta_info->agg[tid]); 1480 1481 sta_info->stats[tid].clear = true; 1482 sta_info->stats[tid].req = false; 1483 1484 if (tid_info) { 1485 bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE); 1486 tid_info->state = CARL9170_TID_STATE_IDLE; 1487 } 1488 rcu_read_unlock(); 1489 1490 if (WARN_ON_ONCE(!tid_info)) 1491 return -EFAULT; 1492 1493 break; 1494 1495 case IEEE80211_AMPDU_RX_START: 1496 case IEEE80211_AMPDU_RX_STOP: 1497 /* Handled by hardware */ 1498 break; 1499 1500 default: 1501 return -EOPNOTSUPP; 1502 } 1503 1504 return 0; 1505 } 1506 1507 #ifdef CONFIG_CARL9170_WPC 1508 static int carl9170_register_wps_button(struct ar9170 *ar) 1509 { 1510 struct input_dev *input; 1511 int err; 1512 1513 if (!(ar->features & CARL9170_WPS_BUTTON)) 1514 return 0; 1515 1516 input = input_allocate_device(); 1517 if (!input) 1518 return -ENOMEM; 1519 1520 snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button", 1521 wiphy_name(ar->hw->wiphy)); 1522 1523 snprintf(ar->wps.phys, sizeof(ar->wps.phys), 1524 "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy)); 1525 1526 input->name = ar->wps.name; 1527 input->phys = ar->wps.phys; 1528 input->id.bustype = BUS_USB; 1529 input->dev.parent = &ar->hw->wiphy->dev; 1530 1531 input_set_capability(input, EV_KEY, KEY_WPS_BUTTON); 1532 1533 err = input_register_device(input); 1534 if (err) { 1535 input_free_device(input); 1536 return err; 1537 } 1538 1539 ar->wps.pbc = input; 1540 return 0; 1541 } 1542 #endif /* CONFIG_CARL9170_WPC */ 1543 1544 #ifdef CONFIG_CARL9170_HWRNG 1545 static int carl9170_rng_get(struct ar9170 *ar) 1546 { 1547 1548 #define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32)) 1549 #define RB (CARL9170_MAX_CMD_PAYLOAD_LEN) 1550 1551 static const __le32 rng_load[RW] = { 1552 [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)}; 1553 1554 u32 buf[RW]; 1555 1556 unsigned int i, off = 0, transfer, count; 1557 int err; 1558 1559 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN); 1560 1561 if (!IS_ACCEPTING_CMD(ar) || !ar->rng.initialized) 1562 return -EAGAIN; 1563 1564 count = ARRAY_SIZE(ar->rng.cache); 1565 while (count) { 1566 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, 1567 RB, (u8 *) rng_load, 1568 RB, (u8 *) buf); 1569 if (err) 1570 return err; 1571 1572 transfer = min_t(unsigned int, count, RW); 1573 for (i = 0; i < transfer; i++) 1574 ar->rng.cache[off + i] = buf[i]; 1575 1576 off += transfer; 1577 count -= transfer; 1578 } 1579 1580 ar->rng.cache_idx = 0; 1581 1582 #undef RW 1583 #undef RB 1584 return 0; 1585 } 1586 1587 static int carl9170_rng_read(struct hwrng *rng, u32 *data) 1588 { 1589 struct ar9170 *ar = (struct ar9170 *)rng->priv; 1590 int ret = -EIO; 1591 1592 mutex_lock(&ar->mutex); 1593 if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) { 1594 ret = carl9170_rng_get(ar); 1595 if (ret) { 1596 mutex_unlock(&ar->mutex); 1597 return ret; 1598 } 1599 } 1600 1601 *data = ar->rng.cache[ar->rng.cache_idx++]; 1602 mutex_unlock(&ar->mutex); 1603 1604 return sizeof(u16); 1605 } 1606 1607 static void carl9170_unregister_hwrng(struct ar9170 *ar) 1608 { 1609 if (ar->rng.initialized) { 1610 hwrng_unregister(&ar->rng.rng); 1611 ar->rng.initialized = false; 1612 } 1613 } 1614 1615 static int carl9170_register_hwrng(struct ar9170 *ar) 1616 { 1617 int err; 1618 1619 snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name), 1620 "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy)); 1621 ar->rng.rng.name = ar->rng.name; 1622 ar->rng.rng.data_read = carl9170_rng_read; 1623 ar->rng.rng.priv = (unsigned long)ar; 1624 1625 if (WARN_ON(ar->rng.initialized)) 1626 return -EALREADY; 1627 1628 err = hwrng_register(&ar->rng.rng); 1629 if (err) { 1630 dev_err(&ar->udev->dev, "Failed to register the random " 1631 "number generator (%d)\n", err); 1632 return err; 1633 } 1634 1635 ar->rng.initialized = true; 1636 1637 err = carl9170_rng_get(ar); 1638 if (err) { 1639 carl9170_unregister_hwrng(ar); 1640 return err; 1641 } 1642 1643 return 0; 1644 } 1645 #endif /* CONFIG_CARL9170_HWRNG */ 1646 1647 static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx, 1648 struct survey_info *survey) 1649 { 1650 struct ar9170 *ar = hw->priv; 1651 struct ieee80211_channel *chan; 1652 struct ieee80211_supported_band *band; 1653 int err, b, i; 1654 1655 chan = ar->channel; 1656 if (!chan) 1657 return -ENODEV; 1658 1659 if (idx == chan->hw_value) { 1660 mutex_lock(&ar->mutex); 1661 err = carl9170_update_survey(ar, false, true); 1662 mutex_unlock(&ar->mutex); 1663 if (err) 1664 return err; 1665 } 1666 1667 for (b = 0; b < IEEE80211_NUM_BANDS; b++) { 1668 band = ar->hw->wiphy->bands[b]; 1669 1670 if (!band) 1671 continue; 1672 1673 for (i = 0; i < band->n_channels; i++) { 1674 if (band->channels[i].hw_value == idx) { 1675 chan = &band->channels[i]; 1676 goto found; 1677 } 1678 } 1679 } 1680 return -ENOENT; 1681 1682 found: 1683 memcpy(survey, &ar->survey[idx], sizeof(*survey)); 1684 1685 survey->channel = chan; 1686 survey->filled = SURVEY_INFO_NOISE_DBM; 1687 1688 if (ar->channel == chan) 1689 survey->filled |= SURVEY_INFO_IN_USE; 1690 1691 if (ar->fw.hw_counters) { 1692 survey->filled |= SURVEY_INFO_TIME | 1693 SURVEY_INFO_TIME_BUSY | 1694 SURVEY_INFO_TIME_TX; 1695 } 1696 1697 return 0; 1698 } 1699 1700 static void carl9170_op_flush(struct ieee80211_hw *hw, 1701 struct ieee80211_vif *vif, 1702 u32 queues, bool drop) 1703 { 1704 struct ar9170 *ar = hw->priv; 1705 unsigned int vid; 1706 1707 mutex_lock(&ar->mutex); 1708 for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num) 1709 carl9170_flush_cab(ar, vid); 1710 1711 carl9170_flush(ar, drop); 1712 mutex_unlock(&ar->mutex); 1713 } 1714 1715 static int carl9170_op_get_stats(struct ieee80211_hw *hw, 1716 struct ieee80211_low_level_stats *stats) 1717 { 1718 struct ar9170 *ar = hw->priv; 1719 1720 memset(stats, 0, sizeof(*stats)); 1721 stats->dot11ACKFailureCount = ar->tx_ack_failures; 1722 stats->dot11FCSErrorCount = ar->tx_fcs_errors; 1723 return 0; 1724 } 1725 1726 static void carl9170_op_sta_notify(struct ieee80211_hw *hw, 1727 struct ieee80211_vif *vif, 1728 enum sta_notify_cmd cmd, 1729 struct ieee80211_sta *sta) 1730 { 1731 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; 1732 1733 switch (cmd) { 1734 case STA_NOTIFY_SLEEP: 1735 sta_info->sleeping = true; 1736 if (atomic_read(&sta_info->pending_frames)) 1737 ieee80211_sta_block_awake(hw, sta, true); 1738 break; 1739 1740 case STA_NOTIFY_AWAKE: 1741 sta_info->sleeping = false; 1742 break; 1743 } 1744 } 1745 1746 static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw) 1747 { 1748 struct ar9170 *ar = hw->priv; 1749 1750 return !!atomic_read(&ar->tx_total_queued); 1751 } 1752 1753 static const struct ieee80211_ops carl9170_ops = { 1754 .start = carl9170_op_start, 1755 .stop = carl9170_op_stop, 1756 .tx = carl9170_op_tx, 1757 .flush = carl9170_op_flush, 1758 .add_interface = carl9170_op_add_interface, 1759 .remove_interface = carl9170_op_remove_interface, 1760 .config = carl9170_op_config, 1761 .prepare_multicast = carl9170_op_prepare_multicast, 1762 .configure_filter = carl9170_op_configure_filter, 1763 .conf_tx = carl9170_op_conf_tx, 1764 .bss_info_changed = carl9170_op_bss_info_changed, 1765 .get_tsf = carl9170_op_get_tsf, 1766 .set_key = carl9170_op_set_key, 1767 .sta_add = carl9170_op_sta_add, 1768 .sta_remove = carl9170_op_sta_remove, 1769 .sta_notify = carl9170_op_sta_notify, 1770 .get_survey = carl9170_op_get_survey, 1771 .get_stats = carl9170_op_get_stats, 1772 .ampdu_action = carl9170_op_ampdu_action, 1773 .tx_frames_pending = carl9170_tx_frames_pending, 1774 }; 1775 1776 void *carl9170_alloc(size_t priv_size) 1777 { 1778 struct ieee80211_hw *hw; 1779 struct ar9170 *ar; 1780 struct sk_buff *skb; 1781 int i; 1782 1783 /* 1784 * this buffer is used for rx stream reconstruction. 1785 * Under heavy load this device (or the transport layer?) 1786 * tends to split the streams into separate rx descriptors. 1787 */ 1788 1789 skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL); 1790 if (!skb) 1791 goto err_nomem; 1792 1793 hw = ieee80211_alloc_hw(priv_size, &carl9170_ops); 1794 if (!hw) 1795 goto err_nomem; 1796 1797 ar = hw->priv; 1798 ar->hw = hw; 1799 ar->rx_failover = skb; 1800 1801 memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head)); 1802 ar->rx_has_plcp = false; 1803 1804 /* 1805 * Here's a hidden pitfall! 1806 * 1807 * All 4 AC queues work perfectly well under _legacy_ operation. 1808 * However as soon as aggregation is enabled, the traffic flow 1809 * gets very bumpy. Therefore we have to _switch_ to a 1810 * software AC with a single HW queue. 1811 */ 1812 hw->queues = __AR9170_NUM_TXQ; 1813 1814 mutex_init(&ar->mutex); 1815 spin_lock_init(&ar->beacon_lock); 1816 spin_lock_init(&ar->cmd_lock); 1817 spin_lock_init(&ar->tx_stats_lock); 1818 spin_lock_init(&ar->tx_ampdu_list_lock); 1819 spin_lock_init(&ar->mem_lock); 1820 spin_lock_init(&ar->state_lock); 1821 atomic_set(&ar->pending_restarts, 0); 1822 ar->vifs = 0; 1823 for (i = 0; i < ar->hw->queues; i++) { 1824 skb_queue_head_init(&ar->tx_status[i]); 1825 skb_queue_head_init(&ar->tx_pending[i]); 1826 1827 INIT_LIST_HEAD(&ar->bar_list[i]); 1828 spin_lock_init(&ar->bar_list_lock[i]); 1829 } 1830 INIT_WORK(&ar->ps_work, carl9170_ps_work); 1831 INIT_WORK(&ar->ping_work, carl9170_ping_work); 1832 INIT_WORK(&ar->restart_work, carl9170_restart_work); 1833 INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work); 1834 INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work); 1835 INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor); 1836 INIT_LIST_HEAD(&ar->tx_ampdu_list); 1837 rcu_assign_pointer(ar->tx_ampdu_iter, 1838 (struct carl9170_sta_tid *) &ar->tx_ampdu_list); 1839 1840 bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num); 1841 INIT_LIST_HEAD(&ar->vif_list); 1842 init_completion(&ar->tx_flush); 1843 1844 /* firmware decides which modes we support */ 1845 hw->wiphy->interface_modes = 0; 1846 1847 ieee80211_hw_set(hw, RX_INCLUDES_FCS); 1848 ieee80211_hw_set(hw, MFP_CAPABLE); 1849 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 1850 ieee80211_hw_set(hw, SUPPORTS_PS); 1851 ieee80211_hw_set(hw, PS_NULLFUNC_STACK); 1852 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 1853 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE); 1854 ieee80211_hw_set(hw, SIGNAL_DBM); 1855 ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES); 1856 1857 if (!modparam_noht) { 1858 /* 1859 * see the comment above, why we allow the user 1860 * to disable HT by a module parameter. 1861 */ 1862 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 1863 } 1864 1865 hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe); 1866 hw->sta_data_size = sizeof(struct carl9170_sta_info); 1867 hw->vif_data_size = sizeof(struct carl9170_vif_info); 1868 1869 hw->max_rates = CARL9170_TX_MAX_RATES; 1870 hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES; 1871 1872 for (i = 0; i < ARRAY_SIZE(ar->noise); i++) 1873 ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ 1874 1875 return ar; 1876 1877 err_nomem: 1878 kfree_skb(skb); 1879 return ERR_PTR(-ENOMEM); 1880 } 1881 1882 static int carl9170_read_eeprom(struct ar9170 *ar) 1883 { 1884 #define RW 8 /* number of words to read at once */ 1885 #define RB (sizeof(u32) * RW) 1886 u8 *eeprom = (void *)&ar->eeprom; 1887 __le32 offsets[RW]; 1888 int i, j, err; 1889 1890 BUILD_BUG_ON(sizeof(ar->eeprom) & 3); 1891 1892 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4); 1893 #ifndef __CHECKER__ 1894 /* don't want to handle trailing remains */ 1895 BUILD_BUG_ON(sizeof(ar->eeprom) % RB); 1896 #endif 1897 1898 for (i = 0; i < sizeof(ar->eeprom) / RB; i++) { 1899 for (j = 0; j < RW; j++) 1900 offsets[j] = cpu_to_le32(AR9170_EEPROM_START + 1901 RB * i + 4 * j); 1902 1903 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, 1904 RB, (u8 *) &offsets, 1905 RB, eeprom + RB * i); 1906 if (err) 1907 return err; 1908 } 1909 1910 #undef RW 1911 #undef RB 1912 return 0; 1913 } 1914 1915 static int carl9170_parse_eeprom(struct ar9170 *ar) 1916 { 1917 struct ath_regulatory *regulatory = &ar->common.regulatory; 1918 unsigned int rx_streams, tx_streams, tx_params = 0; 1919 int bands = 0; 1920 int chans = 0; 1921 1922 if (ar->eeprom.length == cpu_to_le16(0xffff)) 1923 return -ENODATA; 1924 1925 rx_streams = hweight8(ar->eeprom.rx_mask); 1926 tx_streams = hweight8(ar->eeprom.tx_mask); 1927 1928 if (rx_streams != tx_streams) { 1929 tx_params = IEEE80211_HT_MCS_TX_RX_DIFF; 1930 1931 WARN_ON(!(tx_streams >= 1 && tx_streams <= 1932 IEEE80211_HT_MCS_TX_MAX_STREAMS)); 1933 1934 tx_params = (tx_streams - 1) << 1935 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; 1936 1937 carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params; 1938 carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params; 1939 } 1940 1941 if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { 1942 ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = 1943 &carl9170_band_2GHz; 1944 chans += carl9170_band_2GHz.n_channels; 1945 bands++; 1946 } 1947 if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { 1948 ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = 1949 &carl9170_band_5GHz; 1950 chans += carl9170_band_5GHz.n_channels; 1951 bands++; 1952 } 1953 1954 if (!bands) 1955 return -EINVAL; 1956 1957 ar->survey = kzalloc(sizeof(struct survey_info) * chans, GFP_KERNEL); 1958 if (!ar->survey) 1959 return -ENOMEM; 1960 ar->num_channels = chans; 1961 1962 regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); 1963 1964 /* second part of wiphy init */ 1965 SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address); 1966 1967 return 0; 1968 } 1969 1970 static void carl9170_reg_notifier(struct wiphy *wiphy, 1971 struct regulatory_request *request) 1972 { 1973 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); 1974 struct ar9170 *ar = hw->priv; 1975 1976 ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory); 1977 } 1978 1979 int carl9170_register(struct ar9170 *ar) 1980 { 1981 struct ath_regulatory *regulatory = &ar->common.regulatory; 1982 int err = 0, i; 1983 1984 if (WARN_ON(ar->mem_bitmap)) 1985 return -EINVAL; 1986 1987 ar->mem_bitmap = kzalloc(roundup(ar->fw.mem_blocks, BITS_PER_LONG) * 1988 sizeof(unsigned long), GFP_KERNEL); 1989 1990 if (!ar->mem_bitmap) 1991 return -ENOMEM; 1992 1993 /* try to read EEPROM, init MAC addr */ 1994 err = carl9170_read_eeprom(ar); 1995 if (err) 1996 return err; 1997 1998 err = carl9170_parse_eeprom(ar); 1999 if (err) 2000 return err; 2001 2002 err = ath_regd_init(regulatory, ar->hw->wiphy, 2003 carl9170_reg_notifier); 2004 if (err) 2005 return err; 2006 2007 if (modparam_noht) { 2008 carl9170_band_2GHz.ht_cap.ht_supported = false; 2009 carl9170_band_5GHz.ht_cap.ht_supported = false; 2010 } 2011 2012 for (i = 0; i < ar->fw.vif_num; i++) { 2013 ar->vif_priv[i].id = i; 2014 ar->vif_priv[i].vif = NULL; 2015 } 2016 2017 err = ieee80211_register_hw(ar->hw); 2018 if (err) 2019 return err; 2020 2021 /* mac80211 interface is now registered */ 2022 ar->registered = true; 2023 2024 if (!ath_is_world_regd(regulatory)) 2025 regulatory_hint(ar->hw->wiphy, regulatory->alpha2); 2026 2027 #ifdef CONFIG_CARL9170_DEBUGFS 2028 carl9170_debugfs_register(ar); 2029 #endif /* CONFIG_CARL9170_DEBUGFS */ 2030 2031 err = carl9170_led_init(ar); 2032 if (err) 2033 goto err_unreg; 2034 2035 #ifdef CONFIG_CARL9170_LEDS 2036 err = carl9170_led_register(ar); 2037 if (err) 2038 goto err_unreg; 2039 #endif /* CONFIG_CARL9170_LEDS */ 2040 2041 #ifdef CONFIG_CARL9170_WPC 2042 err = carl9170_register_wps_button(ar); 2043 if (err) 2044 goto err_unreg; 2045 #endif /* CONFIG_CARL9170_WPC */ 2046 2047 #ifdef CONFIG_CARL9170_HWRNG 2048 err = carl9170_register_hwrng(ar); 2049 if (err) 2050 goto err_unreg; 2051 #endif /* CONFIG_CARL9170_HWRNG */ 2052 2053 dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n", 2054 wiphy_name(ar->hw->wiphy)); 2055 2056 return 0; 2057 2058 err_unreg: 2059 carl9170_unregister(ar); 2060 return err; 2061 } 2062 2063 void carl9170_unregister(struct ar9170 *ar) 2064 { 2065 if (!ar->registered) 2066 return; 2067 2068 ar->registered = false; 2069 2070 #ifdef CONFIG_CARL9170_LEDS 2071 carl9170_led_unregister(ar); 2072 #endif /* CONFIG_CARL9170_LEDS */ 2073 2074 #ifdef CONFIG_CARL9170_DEBUGFS 2075 carl9170_debugfs_unregister(ar); 2076 #endif /* CONFIG_CARL9170_DEBUGFS */ 2077 2078 #ifdef CONFIG_CARL9170_WPC 2079 if (ar->wps.pbc) { 2080 input_unregister_device(ar->wps.pbc); 2081 ar->wps.pbc = NULL; 2082 } 2083 #endif /* CONFIG_CARL9170_WPC */ 2084 2085 #ifdef CONFIG_CARL9170_HWRNG 2086 carl9170_unregister_hwrng(ar); 2087 #endif /* CONFIG_CARL9170_HWRNG */ 2088 2089 carl9170_cancel_worker(ar); 2090 cancel_work_sync(&ar->restart_work); 2091 2092 ieee80211_unregister_hw(ar->hw); 2093 } 2094 2095 void carl9170_free(struct ar9170 *ar) 2096 { 2097 WARN_ON(ar->registered); 2098 WARN_ON(IS_INITIALIZED(ar)); 2099 2100 kfree_skb(ar->rx_failover); 2101 ar->rx_failover = NULL; 2102 2103 kfree(ar->mem_bitmap); 2104 ar->mem_bitmap = NULL; 2105 2106 kfree(ar->survey); 2107 ar->survey = NULL; 2108 2109 mutex_destroy(&ar->mutex); 2110 2111 ieee80211_free_hw(ar->hw); 2112 } 2113