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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>4 Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>5 <http://rt2x00.serialmonkey.com>6 7 */8 9/*10 Module: rt2x00lib11 Abstract: rt2x00 generic device routines.12 */13 14#include <linux/kernel.h>15#include <linux/module.h>16#include <linux/slab.h>17#include <linux/log2.h>18#include <linux/of.h>19#include <linux/of_net.h>20 21#include "rt2x00.h"22#include "rt2x00lib.h"23 24/*25 * Utility functions.26 */27u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev,28 struct ieee80211_vif *vif)29{30 /*31 * When in STA mode, bssidx is always 0 otherwise local_address[5]32 * contains the bss number, see BSS_ID_MASK comments for details.33 */34 if (rt2x00dev->intf_sta_count)35 return 0;36 return vif->addr[5] & (rt2x00dev->ops->max_ap_intf - 1);37}38EXPORT_SYMBOL_GPL(rt2x00lib_get_bssidx);39 40/*41 * Radio control handlers.42 */43int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)44{45 int status;46 47 /*48 * Don't enable the radio twice.49 * And check if the hardware button has been disabled.50 */51 if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))52 return 0;53 54 /*55 * Initialize all data queues.56 */57 rt2x00queue_init_queues(rt2x00dev);58 59 /*60 * Enable radio.61 */62 status =63 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);64 if (status)65 return status;66 67 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON);68 69 rt2x00leds_led_radio(rt2x00dev, true);70 rt2x00led_led_activity(rt2x00dev, true);71 72 set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags);73 74 /*75 * Enable queues.76 */77 rt2x00queue_start_queues(rt2x00dev);78 rt2x00link_start_tuner(rt2x00dev);79 80 /*81 * Start watchdog monitoring.82 */83 rt2x00link_start_watchdog(rt2x00dev);84 85 return 0;86}87 88void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)89{90 if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))91 return;92 93 /*94 * Stop watchdog monitoring.95 */96 rt2x00link_stop_watchdog(rt2x00dev);97 98 /*99 * Stop all queues100 */101 rt2x00link_stop_tuner(rt2x00dev);102 rt2x00queue_stop_queues(rt2x00dev);103 rt2x00queue_flush_queues(rt2x00dev, true);104 rt2x00queue_stop_queue(rt2x00dev->bcn);105 106 /*107 * Disable radio.108 */109 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);110 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF);111 rt2x00led_led_activity(rt2x00dev, false);112 rt2x00leds_led_radio(rt2x00dev, false);113}114 115static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,116 struct ieee80211_vif *vif)117{118 struct rt2x00_dev *rt2x00dev = data;119 struct rt2x00_intf *intf = vif_to_intf(vif);120 121 /*122 * It is possible the radio was disabled while the work had been123 * scheduled. If that happens we should return here immediately,124 * note that in the spinlock protected area above the delayed_flags125 * have been cleared correctly.126 */127 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))128 return;129 130 if (test_and_clear_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags)) {131 mutex_lock(&intf->beacon_skb_mutex);132 rt2x00queue_update_beacon(rt2x00dev, vif);133 mutex_unlock(&intf->beacon_skb_mutex);134 }135}136 137static void rt2x00lib_intf_scheduled(struct work_struct *work)138{139 struct rt2x00_dev *rt2x00dev =140 container_of(work, struct rt2x00_dev, intf_work);141 142 /*143 * Iterate over each interface and perform the144 * requested configurations.145 */146 ieee80211_iterate_active_interfaces(rt2x00dev->hw,147 IEEE80211_IFACE_ITER_RESUME_ALL,148 rt2x00lib_intf_scheduled_iter,149 rt2x00dev);150}151 152static void rt2x00lib_autowakeup(struct work_struct *work)153{154 struct rt2x00_dev *rt2x00dev =155 container_of(work, struct rt2x00_dev, autowakeup_work.work);156 157 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))158 return;159 160 if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE))161 rt2x00_err(rt2x00dev, "Device failed to wakeup\n");162 clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);163}164 165/*166 * Interrupt context handlers.167 */168static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac,169 struct ieee80211_vif *vif)170{171 struct ieee80211_tx_control control = {};172 struct rt2x00_dev *rt2x00dev = data;173 struct sk_buff *skb;174 175 /*176 * Only AP mode interfaces do broad- and multicast buffering177 */178 if (vif->type != NL80211_IFTYPE_AP)179 return;180 181 /*182 * Send out buffered broad- and multicast frames183 */184 skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);185 while (skb) {186 rt2x00mac_tx(rt2x00dev->hw, &control, skb);187 skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);188 }189}190 191static void rt2x00lib_beaconupdate_iter(void *data, u8 *mac,192 struct ieee80211_vif *vif)193{194 struct rt2x00_dev *rt2x00dev = data;195 196 if (vif->type != NL80211_IFTYPE_AP &&197 vif->type != NL80211_IFTYPE_ADHOC &&198 vif->type != NL80211_IFTYPE_MESH_POINT)199 return;200 201 /*202 * Update the beacon without locking. This is safe on PCI devices203 * as they only update the beacon periodically here. This should204 * never be called for USB devices.205 */206 WARN_ON(rt2x00_is_usb(rt2x00dev));207 rt2x00queue_update_beacon(rt2x00dev, vif);208}209 210void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)211{212 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))213 return;214 215 /* send buffered bc/mc frames out for every bssid */216 ieee80211_iterate_active_interfaces_atomic(217 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL,218 rt2x00lib_bc_buffer_iter, rt2x00dev);219 /*220 * Devices with pre tbtt interrupt don't need to update the beacon221 * here as they will fetch the next beacon directly prior to222 * transmission.223 */224 if (rt2x00_has_cap_pre_tbtt_interrupt(rt2x00dev))225 return;226 227 /* fetch next beacon */228 ieee80211_iterate_active_interfaces_atomic(229 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL,230 rt2x00lib_beaconupdate_iter, rt2x00dev);231}232EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);233 234void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev)235{236 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))237 return;238 239 /* fetch next beacon */240 ieee80211_iterate_active_interfaces_atomic(241 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL,242 rt2x00lib_beaconupdate_iter, rt2x00dev);243}244EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt);245 246void rt2x00lib_dmastart(struct queue_entry *entry)247{248 set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);249 rt2x00queue_index_inc(entry, Q_INDEX);250}251EXPORT_SYMBOL_GPL(rt2x00lib_dmastart);252 253void rt2x00lib_dmadone(struct queue_entry *entry)254{255 set_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags);256 clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);257 rt2x00queue_index_inc(entry, Q_INDEX_DMA_DONE);258}259EXPORT_SYMBOL_GPL(rt2x00lib_dmadone);260 261static inline int rt2x00lib_txdone_bar_status(struct queue_entry *entry)262{263 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;264 struct ieee80211_bar *bar = (void *) entry->skb->data;265 struct rt2x00_bar_list_entry *bar_entry;266 int ret;267 268 if (likely(!ieee80211_is_back_req(bar->frame_control)))269 return 0;270 271 /*272 * Unlike all other frames, the status report for BARs does273 * not directly come from the hardware as it is incapable of274 * matching a BA to a previously send BAR. The hardware will275 * report all BARs as if they weren't acked at all.276 *277 * Instead the RX-path will scan for incoming BAs and set the278 * block_acked flag if it sees one that was likely caused by279 * a BAR from us.280 *281 * Remove remaining BARs here and return their status for282 * TX done processing.283 */284 ret = 0;285 rcu_read_lock();286 list_for_each_entry_rcu(bar_entry, &rt2x00dev->bar_list, list) {287 if (bar_entry->entry != entry)288 continue;289 290 spin_lock_bh(&rt2x00dev->bar_list_lock);291 /* Return whether this BAR was blockacked or not */292 ret = bar_entry->block_acked;293 /* Remove the BAR from our checklist */294 list_del_rcu(&bar_entry->list);295 spin_unlock_bh(&rt2x00dev->bar_list_lock);296 kfree_rcu(bar_entry, head);297 298 break;299 }300 rcu_read_unlock();301 302 return ret;303}304 305static void rt2x00lib_fill_tx_status(struct rt2x00_dev *rt2x00dev,306 struct ieee80211_tx_info *tx_info,307 struct skb_frame_desc *skbdesc,308 struct txdone_entry_desc *txdesc,309 bool success)310{311 u8 rate_idx, rate_flags, retry_rates;312 int i;313 314 rate_idx = skbdesc->tx_rate_idx;315 rate_flags = skbdesc->tx_rate_flags;316 retry_rates = test_bit(TXDONE_FALLBACK, &txdesc->flags) ?317 (txdesc->retry + 1) : 1;318 319 /*320 * Initialize TX status321 */322 memset(&tx_info->status, 0, sizeof(tx_info->status));323 tx_info->status.ack_signal = 0;324 325 /*326 * Frame was send with retries, hardware tried327 * different rates to send out the frame, at each328 * retry it lowered the rate 1 step except when the329 * lowest rate was used.330 */331 for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) {332 tx_info->status.rates[i].idx = rate_idx - i;333 tx_info->status.rates[i].flags = rate_flags;334 335 if (rate_idx - i == 0) {336 /*337 * The lowest rate (index 0) was used until the338 * number of max retries was reached.339 */340 tx_info->status.rates[i].count = retry_rates - i;341 i++;342 break;343 }344 tx_info->status.rates[i].count = 1;345 }346 if (i < (IEEE80211_TX_MAX_RATES - 1))347 tx_info->status.rates[i].idx = -1; /* terminate */348 349 if (test_bit(TXDONE_NO_ACK_REQ, &txdesc->flags))350 tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;351 352 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {353 if (success)354 tx_info->flags |= IEEE80211_TX_STAT_ACK;355 else356 rt2x00dev->low_level_stats.dot11ACKFailureCount++;357 }358 359 /*360 * Every single frame has it's own tx status, hence report361 * every frame as ampdu of size 1.362 *363 * TODO: if we can find out how many frames were aggregated364 * by the hw we could provide the real ampdu_len to mac80211365 * which would allow the rc algorithm to better decide on366 * which rates are suitable.367 */368 if (test_bit(TXDONE_AMPDU, &txdesc->flags) ||369 tx_info->flags & IEEE80211_TX_CTL_AMPDU) {370 tx_info->flags |= IEEE80211_TX_STAT_AMPDU |371 IEEE80211_TX_CTL_AMPDU;372 tx_info->status.ampdu_len = 1;373 tx_info->status.ampdu_ack_len = success ? 1 : 0;374 }375 376 if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {377 if (success)378 rt2x00dev->low_level_stats.dot11RTSSuccessCount++;379 else380 rt2x00dev->low_level_stats.dot11RTSFailureCount++;381 }382}383 384static void rt2x00lib_clear_entry(struct rt2x00_dev *rt2x00dev,385 struct queue_entry *entry)386{387 /*388 * Make this entry available for reuse.389 */390 entry->skb = NULL;391 entry->flags = 0;392 393 rt2x00dev->ops->lib->clear_entry(entry);394 395 rt2x00queue_index_inc(entry, Q_INDEX_DONE);396 397 /*398 * If the data queue was below the threshold before the txdone399 * handler we must make sure the packet queue in the mac80211 stack400 * is reenabled when the txdone handler has finished. This has to be401 * serialized with rt2x00mac_tx(), otherwise we can wake up queue402 * before it was stopped.403 */404 spin_lock_bh(&entry->queue->tx_lock);405 if (!rt2x00queue_threshold(entry->queue))406 rt2x00queue_unpause_queue(entry->queue);407 spin_unlock_bh(&entry->queue->tx_lock);408}409 410void rt2x00lib_txdone_nomatch(struct queue_entry *entry,411 struct txdone_entry_desc *txdesc)412{413 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;414 struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);415 struct ieee80211_tx_info txinfo = {};416 bool success;417 418 /*419 * Unmap the skb.420 */421 rt2x00queue_unmap_skb(entry);422 423 /*424 * Signal that the TX descriptor is no longer in the skb.425 */426 skbdesc->flags &= ~SKBDESC_DESC_IN_SKB;427 428 /*429 * Send frame to debugfs immediately, after this call is completed430 * we are going to overwrite the skb->cb array.431 */432 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry);433 434 /*435 * Determine if the frame has been successfully transmitted and436 * remove BARs from our check list while checking for their437 * TX status.438 */439 success =440 rt2x00lib_txdone_bar_status(entry) ||441 test_bit(TXDONE_SUCCESS, &txdesc->flags);442 443 if (!test_bit(TXDONE_UNKNOWN, &txdesc->flags)) {444 /*445 * Update TX statistics.446 */447 rt2x00dev->link.qual.tx_success += success;448 rt2x00dev->link.qual.tx_failed += !success;449 450 rt2x00lib_fill_tx_status(rt2x00dev, &txinfo, skbdesc, txdesc,451 success);452 ieee80211_tx_status_noskb(rt2x00dev->hw, skbdesc->sta, &txinfo);453 }454 455 dev_kfree_skb_any(entry->skb);456 rt2x00lib_clear_entry(rt2x00dev, entry);457}458EXPORT_SYMBOL_GPL(rt2x00lib_txdone_nomatch);459 460void rt2x00lib_txdone(struct queue_entry *entry,461 struct txdone_entry_desc *txdesc)462{463 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;464 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);465 struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);466 u8 skbdesc_flags = skbdesc->flags;467 unsigned int header_length;468 bool success;469 470 /*471 * Unmap the skb.472 */473 rt2x00queue_unmap_skb(entry);474 475 /*476 * Remove the extra tx headroom from the skb.477 */478 skb_pull(entry->skb, rt2x00dev->extra_tx_headroom);479 480 /*481 * Signal that the TX descriptor is no longer in the skb.482 */483 skbdesc->flags &= ~SKBDESC_DESC_IN_SKB;484 485 /*486 * Determine the length of 802.11 header.487 */488 header_length = ieee80211_get_hdrlen_from_skb(entry->skb);489 490 /*491 * Remove L2 padding which was added during492 */493 if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_L2PAD))494 rt2x00queue_remove_l2pad(entry->skb, header_length);495 496 /*497 * If the IV/EIV data was stripped from the frame before it was498 * passed to the hardware, we should now reinsert it again because499 * mac80211 will expect the same data to be present it the500 * frame as it was passed to us.501 */502 if (rt2x00_has_cap_hw_crypto(rt2x00dev))503 rt2x00crypto_tx_insert_iv(entry->skb, header_length);504 505 /*506 * Send frame to debugfs immediately, after this call is completed507 * we are going to overwrite the skb->cb array.508 */509 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry);510 511 /*512 * Determine if the frame has been successfully transmitted and513 * remove BARs from our check list while checking for their514 * TX status.515 */516 success =517 rt2x00lib_txdone_bar_status(entry) ||518 test_bit(TXDONE_SUCCESS, &txdesc->flags) ||519 test_bit(TXDONE_UNKNOWN, &txdesc->flags);520 521 /*522 * Update TX statistics.523 */524 rt2x00dev->link.qual.tx_success += success;525 rt2x00dev->link.qual.tx_failed += !success;526 527 rt2x00lib_fill_tx_status(rt2x00dev, tx_info, skbdesc, txdesc, success);528 529 /*530 * Only send the status report to mac80211 when it's a frame531 * that originated in mac80211. If this was a extra frame coming532 * through a mac80211 library call (RTS/CTS) then we should not533 * send the status report back.534 */535 if (!(skbdesc_flags & SKBDESC_NOT_MAC80211)) {536 if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_TASKLET_CONTEXT))537 ieee80211_tx_status_skb(rt2x00dev->hw, entry->skb);538 else539 ieee80211_tx_status_ni(rt2x00dev->hw, entry->skb);540 } else {541 dev_kfree_skb_any(entry->skb);542 }543 544 rt2x00lib_clear_entry(rt2x00dev, entry);545}546EXPORT_SYMBOL_GPL(rt2x00lib_txdone);547 548void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status)549{550 struct txdone_entry_desc txdesc;551 552 txdesc.flags = 0;553 __set_bit(status, &txdesc.flags);554 txdesc.retry = 0;555 556 rt2x00lib_txdone(entry, &txdesc);557}558EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo);559 560static u8 *rt2x00lib_find_ie(u8 *data, unsigned int len, u8 ie)561{562 struct ieee80211_mgmt *mgmt = (void *)data;563 u8 *pos, *end;564 565 pos = (u8 *)mgmt->u.beacon.variable;566 end = data + len;567 while (pos < end) {568 if (pos + 2 + pos[1] > end)569 return NULL;570 571 if (pos[0] == ie)572 return pos;573 574 pos += 2 + pos[1];575 }576 577 return NULL;578}579 580static void rt2x00lib_sleep(struct work_struct *work)581{582 struct rt2x00_dev *rt2x00dev =583 container_of(work, struct rt2x00_dev, sleep_work);584 585 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))586 return;587 588 /*589 * Check again is powersaving is enabled, to prevent races from delayed590 * work execution.591 */592 if (!test_bit(CONFIG_POWERSAVING, &rt2x00dev->flags))593 rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf,594 IEEE80211_CONF_CHANGE_PS);595}596 597static void rt2x00lib_rxdone_check_ba(struct rt2x00_dev *rt2x00dev,598 struct sk_buff *skb,599 struct rxdone_entry_desc *rxdesc)600{601 struct rt2x00_bar_list_entry *entry;602 struct ieee80211_bar *ba = (void *)skb->data;603 604 if (likely(!ieee80211_is_back(ba->frame_control)))605 return;606 607 if (rxdesc->size < sizeof(*ba) + FCS_LEN)608 return;609 610 rcu_read_lock();611 list_for_each_entry_rcu(entry, &rt2x00dev->bar_list, list) {612 613 if (ba->start_seq_num != entry->start_seq_num)614 continue;615 616#define TID_CHECK(a, b) ( \617 ((a) & cpu_to_le16(IEEE80211_BAR_CTRL_TID_INFO_MASK)) == \618 ((b) & cpu_to_le16(IEEE80211_BAR_CTRL_TID_INFO_MASK))) \619 620 if (!TID_CHECK(ba->control, entry->control))621 continue;622 623#undef TID_CHECK624 625 if (!ether_addr_equal_64bits(ba->ra, entry->ta))626 continue;627 628 if (!ether_addr_equal_64bits(ba->ta, entry->ra))629 continue;630 631 /* Mark BAR since we received the according BA */632 spin_lock_bh(&rt2x00dev->bar_list_lock);633 entry->block_acked = 1;634 spin_unlock_bh(&rt2x00dev->bar_list_lock);635 break;636 }637 rcu_read_unlock();638 639}640 641static void rt2x00lib_rxdone_check_ps(struct rt2x00_dev *rt2x00dev,642 struct sk_buff *skb,643 struct rxdone_entry_desc *rxdesc)644{645 struct ieee80211_hdr *hdr = (void *) skb->data;646 struct ieee80211_tim_ie *tim_ie;647 u8 *tim;648 u8 tim_len;649 bool cam;650 651 /* If this is not a beacon, or if mac80211 has no powersaving652 * configured, or if the device is already in powersaving mode653 * we can exit now. */654 if (likely(!ieee80211_is_beacon(hdr->frame_control) ||655 !(rt2x00dev->hw->conf.flags & IEEE80211_CONF_PS)))656 return;657 658 /* min. beacon length + FCS_LEN */659 if (skb->len <= 40 + FCS_LEN)660 return;661 662 /* and only beacons from the associated BSSID, please */663 if (!(rxdesc->dev_flags & RXDONE_MY_BSS) ||664 !rt2x00dev->aid)665 return;666 667 rt2x00dev->last_beacon = jiffies;668 669 tim = rt2x00lib_find_ie(skb->data, skb->len - FCS_LEN, WLAN_EID_TIM);670 if (!tim)671 return;672 673 if (tim[1] < sizeof(*tim_ie))674 return;675 676 tim_len = tim[1];677 tim_ie = (struct ieee80211_tim_ie *) &tim[2];678 679 /* Check whenever the PHY can be turned off again. */680 681 /* 1. What about buffered unicast traffic for our AID? */682 cam = ieee80211_check_tim(tim_ie, tim_len, rt2x00dev->aid);683 684 /* 2. Maybe the AP wants to send multicast/broadcast data? */685 cam |= (tim_ie->bitmap_ctrl & 0x01);686 687 if (!cam && !test_bit(CONFIG_POWERSAVING, &rt2x00dev->flags))688 queue_work(rt2x00dev->workqueue, &rt2x00dev->sleep_work);689}690 691static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev,692 struct rxdone_entry_desc *rxdesc)693{694 struct ieee80211_supported_band *sband;695 const struct rt2x00_rate *rate;696 unsigned int i;697 int signal = rxdesc->signal;698 int type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK);699 700 switch (rxdesc->rate_mode) {701 case RATE_MODE_CCK:702 case RATE_MODE_OFDM:703 /*704 * For non-HT rates the MCS value needs to contain the705 * actually used rate modulation (CCK or OFDM).706 */707 if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS)708 signal = RATE_MCS(rxdesc->rate_mode, signal);709 710 sband = &rt2x00dev->bands[rt2x00dev->curr_band];711 for (i = 0; i < sband->n_bitrates; i++) {712 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);713 if (((type == RXDONE_SIGNAL_PLCP) &&714 (rate->plcp == signal)) ||715 ((type == RXDONE_SIGNAL_BITRATE) &&716 (rate->bitrate == signal)) ||717 ((type == RXDONE_SIGNAL_MCS) &&718 (rate->mcs == signal))) {719 return i;720 }721 }722 break;723 case RATE_MODE_HT_MIX:724 case RATE_MODE_HT_GREENFIELD:725 if (signal >= 0 && signal <= 76)726 return signal;727 break;728 default:729 break;730 }731 732 rt2x00_warn(rt2x00dev, "Frame received with unrecognized signal, mode=0x%.4x, signal=0x%.4x, type=%d\n",733 rxdesc->rate_mode, signal, type);734 return 0;735}736 737void rt2x00lib_rxdone(struct queue_entry *entry, gfp_t gfp)738{739 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;740 struct rxdone_entry_desc rxdesc;741 struct sk_buff *skb;742 struct ieee80211_rx_status *rx_status;743 unsigned int header_length;744 int rate_idx;745 746 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||747 !test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))748 goto submit_entry;749 750 if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))751 goto submit_entry;752 753 /*754 * Allocate a new sk_buffer. If no new buffer available, drop the755 * received frame and reuse the existing buffer.756 */757 skb = rt2x00queue_alloc_rxskb(entry, gfp);758 if (!skb)759 goto submit_entry;760 761 /*762 * Unmap the skb.763 */764 rt2x00queue_unmap_skb(entry);765 766 /*767 * Extract the RXD details.768 */769 memset(&rxdesc, 0, sizeof(rxdesc));770 rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);771 772 /*773 * Check for valid size in case we get corrupted descriptor from774 * hardware.775 */776 if (unlikely(rxdesc.size == 0 ||777 rxdesc.size > entry->queue->data_size)) {778 rt2x00_err(rt2x00dev, "Wrong frame size %d max %d\n",779 rxdesc.size, entry->queue->data_size);780 dev_kfree_skb(entry->skb);781 goto renew_skb;782 }783 784 /*785 * The data behind the ieee80211 header must be786 * aligned on a 4 byte boundary.787 */788 header_length = ieee80211_get_hdrlen_from_skb(entry->skb);789 790 /*791 * Hardware might have stripped the IV/EIV/ICV data,792 * in that case it is possible that the data was793 * provided separately (through hardware descriptor)794 * in which case we should reinsert the data into the frame.795 */796 if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) &&797 (rxdesc.flags & RX_FLAG_IV_STRIPPED))798 rt2x00crypto_rx_insert_iv(entry->skb, header_length,799 &rxdesc);800 else if (header_length &&801 (rxdesc.size > header_length) &&802 (rxdesc.dev_flags & RXDONE_L2PAD))803 rt2x00queue_remove_l2pad(entry->skb, header_length);804 805 /* Trim buffer to correct size */806 skb_trim(entry->skb, rxdesc.size);807 808 /*809 * Translate the signal to the correct bitrate index.810 */811 rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc);812 if (rxdesc.rate_mode == RATE_MODE_HT_MIX ||813 rxdesc.rate_mode == RATE_MODE_HT_GREENFIELD)814 rxdesc.encoding = RX_ENC_HT;815 816 /*817 * Check if this is a beacon, and more frames have been818 * buffered while we were in powersaving mode.819 */820 rt2x00lib_rxdone_check_ps(rt2x00dev, entry->skb, &rxdesc);821 822 /*823 * Check for incoming BlockAcks to match to the BlockAckReqs824 * we've send out.825 */826 rt2x00lib_rxdone_check_ba(rt2x00dev, entry->skb, &rxdesc);827 828 /*829 * Update extra components830 */831 rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);832 rt2x00debug_update_crypto(rt2x00dev, &rxdesc);833 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry);834 835 /*836 * Initialize RX status information, and send frame837 * to mac80211.838 */839 rx_status = IEEE80211_SKB_RXCB(entry->skb);840 841 /* Ensure that all fields of rx_status are initialized842 * properly. The skb->cb array was used for driver843 * specific informations, so rx_status might contain844 * garbage.845 */846 memset(rx_status, 0, sizeof(*rx_status));847 848 rx_status->mactime = rxdesc.timestamp;849 rx_status->band = rt2x00dev->curr_band;850 rx_status->freq = rt2x00dev->curr_freq;851 rx_status->rate_idx = rate_idx;852 rx_status->signal = rxdesc.rssi;853 rx_status->flag = rxdesc.flags;854 rx_status->enc_flags = rxdesc.enc_flags;855 rx_status->encoding = rxdesc.encoding;856 rx_status->bw = rxdesc.bw;857 rx_status->antenna = rt2x00dev->link.ant.active.rx;858 859 ieee80211_rx_ni(rt2x00dev->hw, entry->skb);860 861renew_skb:862 /*863 * Replace the skb with the freshly allocated one.864 */865 entry->skb = skb;866 867submit_entry:868 entry->flags = 0;869 rt2x00queue_index_inc(entry, Q_INDEX_DONE);870 if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&871 test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))872 rt2x00dev->ops->lib->clear_entry(entry);873}874EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);875 876/*877 * Driver initialization handlers.878 */879const struct rt2x00_rate rt2x00_supported_rates[12] = {880 {881 .flags = DEV_RATE_CCK,882 .bitrate = 10,883 .ratemask = BIT(0),884 .plcp = 0x00,885 .mcs = RATE_MCS(RATE_MODE_CCK, 0),886 },887 {888 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,889 .bitrate = 20,890 .ratemask = BIT(1),891 .plcp = 0x01,892 .mcs = RATE_MCS(RATE_MODE_CCK, 1),893 },894 {895 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,896 .bitrate = 55,897 .ratemask = BIT(2),898 .plcp = 0x02,899 .mcs = RATE_MCS(RATE_MODE_CCK, 2),900 },901 {902 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,903 .bitrate = 110,904 .ratemask = BIT(3),905 .plcp = 0x03,906 .mcs = RATE_MCS(RATE_MODE_CCK, 3),907 },908 {909 .flags = DEV_RATE_OFDM,910 .bitrate = 60,911 .ratemask = BIT(4),912 .plcp = 0x0b,913 .mcs = RATE_MCS(RATE_MODE_OFDM, 0),914 },915 {916 .flags = DEV_RATE_OFDM,917 .bitrate = 90,918 .ratemask = BIT(5),919 .plcp = 0x0f,920 .mcs = RATE_MCS(RATE_MODE_OFDM, 1),921 },922 {923 .flags = DEV_RATE_OFDM,924 .bitrate = 120,925 .ratemask = BIT(6),926 .plcp = 0x0a,927 .mcs = RATE_MCS(RATE_MODE_OFDM, 2),928 },929 {930 .flags = DEV_RATE_OFDM,931 .bitrate = 180,932 .ratemask = BIT(7),933 .plcp = 0x0e,934 .mcs = RATE_MCS(RATE_MODE_OFDM, 3),935 },936 {937 .flags = DEV_RATE_OFDM,938 .bitrate = 240,939 .ratemask = BIT(8),940 .plcp = 0x09,941 .mcs = RATE_MCS(RATE_MODE_OFDM, 4),942 },943 {944 .flags = DEV_RATE_OFDM,945 .bitrate = 360,946 .ratemask = BIT(9),947 .plcp = 0x0d,948 .mcs = RATE_MCS(RATE_MODE_OFDM, 5),949 },950 {951 .flags = DEV_RATE_OFDM,952 .bitrate = 480,953 .ratemask = BIT(10),954 .plcp = 0x08,955 .mcs = RATE_MCS(RATE_MODE_OFDM, 6),956 },957 {958 .flags = DEV_RATE_OFDM,959 .bitrate = 540,960 .ratemask = BIT(11),961 .plcp = 0x0c,962 .mcs = RATE_MCS(RATE_MODE_OFDM, 7),963 },964};965 966static void rt2x00lib_channel(struct ieee80211_channel *entry,967 const int channel, const int tx_power,968 const int value)969{970 /* XXX: this assumption about the band is wrong for 802.11j */971 entry->band = channel <= 14 ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;972 entry->center_freq = ieee80211_channel_to_frequency(channel,973 entry->band);974 entry->hw_value = value;975 entry->max_power = tx_power;976 entry->max_antenna_gain = 0xff;977}978 979static void rt2x00lib_rate(struct ieee80211_rate *entry,980 const u16 index, const struct rt2x00_rate *rate)981{982 entry->flags = 0;983 entry->bitrate = rate->bitrate;984 entry->hw_value = index;985 entry->hw_value_short = index;986 987 if (rate->flags & DEV_RATE_SHORT_PREAMBLE)988 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;989}990 991void rt2x00lib_set_mac_address(struct rt2x00_dev *rt2x00dev, u8 *eeprom_mac_addr)992{993 of_get_mac_address(rt2x00dev->dev->of_node, eeprom_mac_addr);994 995 if (!is_valid_ether_addr(eeprom_mac_addr)) {996 eth_random_addr(eeprom_mac_addr);997 rt2x00_eeprom_dbg(rt2x00dev, "MAC: %pM\n", eeprom_mac_addr);998 }999}1000EXPORT_SYMBOL_GPL(rt2x00lib_set_mac_address);1001 1002static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,1003 struct hw_mode_spec *spec)1004{1005 struct ieee80211_hw *hw = rt2x00dev->hw;1006 struct ieee80211_channel *channels;1007 struct ieee80211_rate *rates;1008 unsigned int num_rates;1009 unsigned int i;1010 1011 num_rates = 0;1012 if (spec->supported_rates & SUPPORT_RATE_CCK)1013 num_rates += 4;1014 if (spec->supported_rates & SUPPORT_RATE_OFDM)1015 num_rates += 8;1016 1017 channels = kcalloc(spec->num_channels, sizeof(*channels), GFP_KERNEL);1018 if (!channels)1019 return -ENOMEM;1020 1021 rates = kcalloc(num_rates, sizeof(*rates), GFP_KERNEL);1022 if (!rates)1023 goto exit_free_channels;1024 1025 /*1026 * Initialize Rate list.1027 */1028 for (i = 0; i < num_rates; i++)1029 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));1030 1031 /*1032 * Initialize Channel list.1033 */1034 for (i = 0; i < spec->num_channels; i++) {1035 rt2x00lib_channel(&channels[i],1036 spec->channels[i].channel,1037 spec->channels_info[i].max_power, i);1038 }1039 1040 /*1041 * Intitialize 802.11b, 802.11g1042 * Rates: CCK, OFDM.1043 * Channels: 2.4 GHz1044 */1045 if (spec->supported_bands & SUPPORT_BAND_2GHZ) {1046 rt2x00dev->bands[NL80211_BAND_2GHZ].n_channels = 14;1047 rt2x00dev->bands[NL80211_BAND_2GHZ].n_bitrates = num_rates;1048 rt2x00dev->bands[NL80211_BAND_2GHZ].channels = channels;1049 rt2x00dev->bands[NL80211_BAND_2GHZ].bitrates = rates;1050 hw->wiphy->bands[NL80211_BAND_2GHZ] =1051 &rt2x00dev->bands[NL80211_BAND_2GHZ];1052 memcpy(&rt2x00dev->bands[NL80211_BAND_2GHZ].ht_cap,1053 &spec->ht, sizeof(spec->ht));1054 }1055 1056 /*1057 * Intitialize 802.11a1058 * Rates: OFDM.1059 * Channels: OFDM, UNII, HiperLAN2.1060 */1061 if (spec->supported_bands & SUPPORT_BAND_5GHZ) {1062 rt2x00dev->bands[NL80211_BAND_5GHZ].n_channels =1063 spec->num_channels - 14;1064 rt2x00dev->bands[NL80211_BAND_5GHZ].n_bitrates =1065 num_rates - 4;1066 rt2x00dev->bands[NL80211_BAND_5GHZ].channels = &channels[14];1067 rt2x00dev->bands[NL80211_BAND_5GHZ].bitrates = &rates[4];1068 hw->wiphy->bands[NL80211_BAND_5GHZ] =1069 &rt2x00dev->bands[NL80211_BAND_5GHZ];1070 memcpy(&rt2x00dev->bands[NL80211_BAND_5GHZ].ht_cap,1071 &spec->ht, sizeof(spec->ht));1072 }1073 1074 return 0;1075 1076 exit_free_channels:1077 kfree(channels);1078 rt2x00_err(rt2x00dev, "Allocation ieee80211 modes failed\n");1079 return -ENOMEM;1080}1081 1082static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)1083{1084 if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))1085 ieee80211_unregister_hw(rt2x00dev->hw);1086 1087 if (likely(rt2x00dev->hw->wiphy->bands[NL80211_BAND_2GHZ])) {1088 kfree(rt2x00dev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels);1089 kfree(rt2x00dev->hw->wiphy->bands[NL80211_BAND_2GHZ]->bitrates);1090 rt2x00dev->hw->wiphy->bands[NL80211_BAND_2GHZ] = NULL;1091 rt2x00dev->hw->wiphy->bands[NL80211_BAND_5GHZ] = NULL;1092 }1093 1094 kfree(rt2x00dev->spec.channels_info);1095 kfree(rt2x00dev->chan_survey);1096}1097 1098static const struct ieee80211_tpt_blink rt2x00_tpt_blink[] = {1099 { .throughput = 0 * 1024, .blink_time = 334 },1100 { .throughput = 1 * 1024, .blink_time = 260 },1101 { .throughput = 2 * 1024, .blink_time = 220 },1102 { .throughput = 5 * 1024, .blink_time = 190 },1103 { .throughput = 10 * 1024, .blink_time = 170 },1104 { .throughput = 25 * 1024, .blink_time = 150 },1105 { .throughput = 54 * 1024, .blink_time = 130 },1106 { .throughput = 120 * 1024, .blink_time = 110 },1107 { .throughput = 265 * 1024, .blink_time = 80 },1108 { .throughput = 586 * 1024, .blink_time = 50 },1109};1110 1111static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)1112{1113 struct hw_mode_spec *spec = &rt2x00dev->spec;1114 int status;1115 1116 if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))1117 return 0;1118 1119 /*1120 * Initialize HW modes.1121 */1122 status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);1123 if (status)1124 return status;1125 1126 /*1127 * Initialize HW fields.1128 */1129 rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;1130 1131 /*1132 * Initialize extra TX headroom required.1133 */1134 rt2x00dev->hw->extra_tx_headroom =1135 max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM,1136 rt2x00dev->extra_tx_headroom);1137 1138 /*1139 * Take TX headroom required for alignment into account.1140 */1141 if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_L2PAD))1142 rt2x00dev->hw->extra_tx_headroom += RT2X00_L2PAD_SIZE;1143 else if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_DMA))1144 rt2x00dev->hw->extra_tx_headroom += RT2X00_ALIGN_SIZE;1145 1146 /*1147 * Tell mac80211 about the size of our private STA structure.1148 */1149 rt2x00dev->hw->sta_data_size = sizeof(struct rt2x00_sta);1150 1151 /*1152 * Allocate tx status FIFO for driver use.1153 */1154 if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_TXSTATUS_FIFO)) {1155 /*1156 * Allocate the txstatus fifo. In the worst case the tx1157 * status fifo has to hold the tx status of all entries1158 * in all tx queues. Hence, calculate the kfifo size as1159 * tx_queues * entry_num and round up to the nearest1160 * power of 2.1161 */1162 int kfifo_size =1163 roundup_pow_of_two(rt2x00dev->ops->tx_queues *1164 rt2x00dev->tx->limit *1165 sizeof(u32));1166 1167 status = kfifo_alloc(&rt2x00dev->txstatus_fifo, kfifo_size,1168 GFP_KERNEL);1169 if (status)1170 return status;1171 }1172 1173 /*1174 * Initialize tasklets if used by the driver. Tasklets are1175 * disabled until the interrupts are turned on. The driver1176 * has to handle that.1177 */1178#define RT2X00_TASKLET_INIT(taskletname) \1179 if (rt2x00dev->ops->lib->taskletname) { \1180 tasklet_setup(&rt2x00dev->taskletname, \1181 rt2x00dev->ops->lib->taskletname); \1182 }1183 1184 RT2X00_TASKLET_INIT(txstatus_tasklet);1185 RT2X00_TASKLET_INIT(pretbtt_tasklet);1186 RT2X00_TASKLET_INIT(tbtt_tasklet);1187 RT2X00_TASKLET_INIT(rxdone_tasklet);1188 RT2X00_TASKLET_INIT(autowake_tasklet);1189 1190#undef RT2X00_TASKLET_INIT1191 1192 ieee80211_create_tpt_led_trigger(rt2x00dev->hw,1193 IEEE80211_TPT_LEDTRIG_FL_RADIO,1194 rt2x00_tpt_blink,1195 ARRAY_SIZE(rt2x00_tpt_blink));1196 1197 /*1198 * Register HW.1199 */1200 status = ieee80211_register_hw(rt2x00dev->hw);1201 if (status)1202 return status;1203 1204 set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags);1205 1206 return 0;1207}1208 1209/*1210 * Initialization/uninitialization handlers.1211 */1212static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)1213{1214 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))1215 return;1216 1217 /*1218 * Stop rfkill polling.1219 */1220 if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_DELAYED_RFKILL))1221 rt2x00rfkill_unregister(rt2x00dev);1222 1223 /*1224 * Allow the HW to uninitialize.1225 */1226 rt2x00dev->ops->lib->uninitialize(rt2x00dev);1227 1228 /*1229 * Free allocated queue entries.1230 */1231 rt2x00queue_uninitialize(rt2x00dev);1232}1233 1234static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)1235{1236 int status;1237 1238 if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))1239 return 0;1240 1241 /*1242 * Allocate all queue entries.1243 */1244 status = rt2x00queue_initialize(rt2x00dev);1245 if (status)1246 return status;1247 1248 /*1249 * Initialize the device.1250 */1251 status = rt2x00dev->ops->lib->initialize(rt2x00dev);1252 if (status) {1253 rt2x00queue_uninitialize(rt2x00dev);1254 return status;1255 }1256 1257 set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);1258 1259 /*1260 * Start rfkill polling.1261 */1262 if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_DELAYED_RFKILL))1263 rt2x00rfkill_register(rt2x00dev);1264 1265 return 0;1266}1267 1268int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)1269{1270 int retval = 0;1271 1272 /*1273 * If this is the first interface which is added,1274 * we should load the firmware now.1275 */1276 retval = rt2x00lib_load_firmware(rt2x00dev);1277 if (retval)1278 goto out;1279 1280 /*1281 * Initialize the device.1282 */1283 retval = rt2x00lib_initialize(rt2x00dev);1284 if (retval)1285 goto out;1286 1287 rt2x00dev->intf_ap_count = 0;1288 rt2x00dev->intf_sta_count = 0;1289 rt2x00dev->intf_associated = 0;1290 rt2x00dev->intf_beaconing = 0;1291 1292 /* Enable the radio */1293 retval = rt2x00lib_enable_radio(rt2x00dev);1294 if (retval)1295 goto out;1296 1297 set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags);1298 1299out:1300 return retval;1301}1302 1303void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)1304{1305 if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))1306 return;1307 1308 /*1309 * Perhaps we can add something smarter here,1310 * but for now just disabling the radio should do.1311 */1312 rt2x00lib_disable_radio(rt2x00dev);1313 1314 rt2x00dev->intf_ap_count = 0;1315 rt2x00dev->intf_sta_count = 0;1316 rt2x00dev->intf_associated = 0;1317 rt2x00dev->intf_beaconing = 0;1318}1319 1320static inline void rt2x00lib_set_if_combinations(struct rt2x00_dev *rt2x00dev)1321{1322 struct ieee80211_iface_limit *if_limit;1323 struct ieee80211_iface_combination *if_combination;1324 1325 if (rt2x00dev->ops->max_ap_intf < 2)1326 return;1327 1328 /*1329 * Build up AP interface limits structure.1330 */1331 if_limit = &rt2x00dev->if_limits_ap;1332 if_limit->max = rt2x00dev->ops->max_ap_intf;1333 if_limit->types = BIT(NL80211_IFTYPE_AP);1334#ifdef CONFIG_MAC80211_MESH1335 if_limit->types |= BIT(NL80211_IFTYPE_MESH_POINT);1336#endif1337 1338 /*1339 * Build up AP interface combinations structure.1340 */1341 if_combination = &rt2x00dev->if_combinations[IF_COMB_AP];1342 if_combination->limits = if_limit;1343 if_combination->n_limits = 1;1344 if_combination->max_interfaces = if_limit->max;1345 if_combination->num_different_channels = 1;1346 1347 /*1348 * Finally, specify the possible combinations to mac80211.1349 */1350 rt2x00dev->hw->wiphy->iface_combinations = rt2x00dev->if_combinations;1351 rt2x00dev->hw->wiphy->n_iface_combinations = 1;1352}1353 1354static unsigned int rt2x00dev_extra_tx_headroom(struct rt2x00_dev *rt2x00dev)1355{1356 if (WARN_ON(!rt2x00dev->tx))1357 return 0;1358 1359 if (rt2x00_is_usb(rt2x00dev))1360 return rt2x00dev->tx[0].winfo_size + rt2x00dev->tx[0].desc_size;1361 1362 return rt2x00dev->tx[0].winfo_size;1363}1364 1365/*1366 * driver allocation handlers.1367 */1368int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)1369{1370 int retval = -ENOMEM;1371 1372 /*1373 * Set possible interface combinations.1374 */1375 rt2x00lib_set_if_combinations(rt2x00dev);1376 1377 /*1378 * Allocate the driver data memory, if necessary.1379 */1380 if (rt2x00dev->ops->drv_data_size > 0) {1381 rt2x00dev->drv_data = kzalloc(rt2x00dev->ops->drv_data_size,1382 GFP_KERNEL);1383 if (!rt2x00dev->drv_data) {1384 retval = -ENOMEM;1385 goto exit;1386 }1387 }1388 1389 spin_lock_init(&rt2x00dev->irqmask_lock);1390 mutex_init(&rt2x00dev->csr_mutex);1391 mutex_init(&rt2x00dev->conf_mutex);1392 INIT_LIST_HEAD(&rt2x00dev->bar_list);1393 spin_lock_init(&rt2x00dev->bar_list_lock);1394 hrtimer_init(&rt2x00dev->txstatus_timer, CLOCK_MONOTONIC,1395 HRTIMER_MODE_REL);1396 1397 set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);1398 1399 /*1400 * Make room for rt2x00_intf inside the per-interface1401 * structure ieee80211_vif.1402 */1403 rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);1404 1405 /*1406 * rt2x00 devices can only use the last n bits of the MAC address1407 * for virtual interfaces.1408 */1409 rt2x00dev->hw->wiphy->addr_mask[ETH_ALEN - 1] =1410 (rt2x00dev->ops->max_ap_intf - 1);1411 1412 /*1413 * Initialize work.1414 */1415 rt2x00dev->workqueue =1416 alloc_ordered_workqueue("%s", 0, wiphy_name(rt2x00dev->hw->wiphy));1417 if (!rt2x00dev->workqueue) {1418 retval = -ENOMEM;1419 goto exit;1420 }1421 1422 INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);1423 INIT_DELAYED_WORK(&rt2x00dev->autowakeup_work, rt2x00lib_autowakeup);1424 INIT_WORK(&rt2x00dev->sleep_work, rt2x00lib_sleep);1425 1426 /*1427 * Let the driver probe the device to detect the capabilities.1428 */1429 retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);1430 if (retval) {1431 rt2x00_err(rt2x00dev, "Failed to allocate device\n");1432 goto exit;1433 }1434 1435 /*1436 * Allocate queue array.1437 */1438 retval = rt2x00queue_allocate(rt2x00dev);1439 if (retval)1440 goto exit;1441 1442 /* Cache TX headroom value */1443 rt2x00dev->extra_tx_headroom = rt2x00dev_extra_tx_headroom(rt2x00dev);1444 1445 /*1446 * Determine which operating modes are supported, all modes1447 * which require beaconing, depend on the availability of1448 * beacon entries.1449 */1450 rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);1451 if (rt2x00dev->bcn->limit > 0)1452 rt2x00dev->hw->wiphy->interface_modes |=1453 BIT(NL80211_IFTYPE_ADHOC) |1454#ifdef CONFIG_MAC80211_MESH1455 BIT(NL80211_IFTYPE_MESH_POINT) |1456#endif1457 BIT(NL80211_IFTYPE_AP);1458 1459 rt2x00dev->hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;1460 1461 wiphy_ext_feature_set(rt2x00dev->hw->wiphy,1462 NL80211_EXT_FEATURE_CQM_RSSI_LIST);1463 1464 /*1465 * Initialize ieee80211 structure.1466 */1467 retval = rt2x00lib_probe_hw(rt2x00dev);1468 if (retval) {1469 rt2x00_err(rt2x00dev, "Failed to initialize hw\n");1470 goto exit;1471 }1472 1473 /*1474 * Register extra components.1475 */1476 rt2x00link_register(rt2x00dev);1477 rt2x00leds_register(rt2x00dev);1478 rt2x00debug_register(rt2x00dev);1479 1480 /*1481 * Start rfkill polling.1482 */1483 if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_DELAYED_RFKILL))1484 rt2x00rfkill_register(rt2x00dev);1485 1486 return 0;1487 1488exit:1489 rt2x00lib_remove_dev(rt2x00dev);1490 1491 return retval;1492}1493EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);1494 1495void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)1496{1497 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);1498 1499 /*1500 * Stop rfkill polling.1501 */1502 if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_DELAYED_RFKILL))1503 rt2x00rfkill_unregister(rt2x00dev);1504 1505 /*1506 * Disable radio.1507 */1508 rt2x00lib_disable_radio(rt2x00dev);1509 1510 /*1511 * Stop all work.1512 */1513 cancel_work_sync(&rt2x00dev->intf_work);1514 cancel_delayed_work_sync(&rt2x00dev->autowakeup_work);1515 cancel_work_sync(&rt2x00dev->sleep_work);1516 1517 hrtimer_cancel(&rt2x00dev->txstatus_timer);1518 1519 /*1520 * Kill the tx status tasklet.1521 */1522 tasklet_kill(&rt2x00dev->txstatus_tasklet);1523 tasklet_kill(&rt2x00dev->pretbtt_tasklet);1524 tasklet_kill(&rt2x00dev->tbtt_tasklet);1525 tasklet_kill(&rt2x00dev->rxdone_tasklet);1526 tasklet_kill(&rt2x00dev->autowake_tasklet);1527 1528 /*1529 * Uninitialize device.1530 */1531 rt2x00lib_uninitialize(rt2x00dev);1532 1533 if (rt2x00dev->workqueue)1534 destroy_workqueue(rt2x00dev->workqueue);1535 1536 /*1537 * Free the tx status fifo.1538 */1539 kfifo_free(&rt2x00dev->txstatus_fifo);1540 1541 /*1542 * Free extra components1543 */1544 rt2x00debug_deregister(rt2x00dev);1545 rt2x00leds_unregister(rt2x00dev);1546 1547 /*1548 * Free ieee80211_hw memory.1549 */1550 rt2x00lib_remove_hw(rt2x00dev);1551 1552 /*1553 * Free firmware image.1554 */1555 rt2x00lib_free_firmware(rt2x00dev);1556 1557 /*1558 * Free queue structures.1559 */1560 rt2x00queue_free(rt2x00dev);1561 1562 /*1563 * Free the driver data.1564 */1565 kfree(rt2x00dev->drv_data);1566}1567EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);1568 1569/*1570 * Device state handlers1571 */1572int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev)1573{1574 rt2x00_dbg(rt2x00dev, "Going to sleep\n");1575 1576 /*1577 * Prevent mac80211 from accessing driver while suspended.1578 */1579 if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))1580 return 0;1581 1582 /*1583 * Cleanup as much as possible.1584 */1585 rt2x00lib_uninitialize(rt2x00dev);1586 1587 /*1588 * Suspend/disable extra components.1589 */1590 rt2x00leds_suspend(rt2x00dev);1591 rt2x00debug_deregister(rt2x00dev);1592 1593 /*1594 * Set device mode to sleep for power management,1595 * on some hardware this call seems to consistently fail.1596 * From the specifications it is hard to tell why it fails,1597 * and if this is a "bad thing".1598 * Overall it is safe to just ignore the failure and1599 * continue suspending. The only downside is that the1600 * device will not be in optimal power save mode, but with1601 * the radio and the other components already disabled the1602 * device is as good as disabled.1603 */1604 if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP))1605 rt2x00_warn(rt2x00dev, "Device failed to enter sleep state, continue suspending\n");1606 1607 return 0;1608}1609EXPORT_SYMBOL_GPL(rt2x00lib_suspend);1610 1611int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)1612{1613 rt2x00_dbg(rt2x00dev, "Waking up\n");1614 1615 /*1616 * Restore/enable extra components.1617 */1618 rt2x00debug_register(rt2x00dev);1619 rt2x00leds_resume(rt2x00dev);1620 1621 /*1622 * We are ready again to receive requests from mac80211.1623 */1624 set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);1625 1626 return 0;1627}1628EXPORT_SYMBOL_GPL(rt2x00lib_resume);1629 1630/*1631 * rt2x00lib module information.1632 */1633MODULE_AUTHOR(DRV_PROJECT);1634MODULE_VERSION(DRV_VERSION);1635MODULE_DESCRIPTION("rt2x00 library");1636MODULE_LICENSE("GPL");1637