2 Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
3 Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
4 <http://rt2x00.serialmonkey.com>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, see <http://www.gnu.org/licenses/>.
22 Abstract: rt2x00 generic device routines.
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/log2.h>
30 #include <linux/of_net.h>
33 #include "rt2x00lib.h"
38 u32
rt2x00lib_get_bssidx(struct rt2x00_dev
*rt2x00dev
,
39 struct ieee80211_vif
*vif
)
42 * When in STA mode, bssidx is always 0 otherwise local_address[5]
43 * contains the bss number, see BSS_ID_MASK comments for details.
45 if (rt2x00dev
->intf_sta_count
)
47 return vif
->addr
[5] & (rt2x00dev
->ops
->max_ap_intf
- 1);
49 EXPORT_SYMBOL_GPL(rt2x00lib_get_bssidx
);
52 * Radio control handlers.
54 int rt2x00lib_enable_radio(struct rt2x00_dev
*rt2x00dev
)
59 * Don't enable the radio twice.
60 * And check if the hardware button has been disabled.
62 if (test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
66 * Initialize all data queues.
68 rt2x00queue_init_queues(rt2x00dev
);
74 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_ON
);
78 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_ON
);
80 rt2x00leds_led_radio(rt2x00dev
, true);
81 rt2x00led_led_activity(rt2x00dev
, true);
83 set_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
);
88 rt2x00queue_start_queues(rt2x00dev
);
89 rt2x00link_start_tuner(rt2x00dev
);
90 rt2x00link_start_agc(rt2x00dev
);
91 if (rt2x00_has_cap_vco_recalibration(rt2x00dev
))
92 rt2x00link_start_vcocal(rt2x00dev
);
95 * Start watchdog monitoring.
97 rt2x00link_start_watchdog(rt2x00dev
);
102 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
104 if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
108 * Stop watchdog monitoring.
110 rt2x00link_stop_watchdog(rt2x00dev
);
115 rt2x00link_stop_agc(rt2x00dev
);
116 if (rt2x00_has_cap_vco_recalibration(rt2x00dev
))
117 rt2x00link_stop_vcocal(rt2x00dev
);
118 rt2x00link_stop_tuner(rt2x00dev
);
119 rt2x00queue_stop_queues(rt2x00dev
);
120 rt2x00queue_flush_queues(rt2x00dev
, true);
125 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
126 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_OFF
);
127 rt2x00led_led_activity(rt2x00dev
, false);
128 rt2x00leds_led_radio(rt2x00dev
, false);
131 static void rt2x00lib_intf_scheduled_iter(void *data
, u8
*mac
,
132 struct ieee80211_vif
*vif
)
134 struct rt2x00_dev
*rt2x00dev
= data
;
135 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
138 * It is possible the radio was disabled while the work had been
139 * scheduled. If that happens we should return here immediately,
140 * note that in the spinlock protected area above the delayed_flags
141 * have been cleared correctly.
143 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
146 if (test_and_clear_bit(DELAYED_UPDATE_BEACON
, &intf
->delayed_flags
)) {
147 mutex_lock(&intf
->beacon_skb_mutex
);
148 rt2x00queue_update_beacon(rt2x00dev
, vif
);
149 mutex_unlock(&intf
->beacon_skb_mutex
);
153 static void rt2x00lib_intf_scheduled(struct work_struct
*work
)
155 struct rt2x00_dev
*rt2x00dev
=
156 container_of(work
, struct rt2x00_dev
, intf_work
);
159 * Iterate over each interface and perform the
160 * requested configurations.
162 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
163 IEEE80211_IFACE_ITER_RESUME_ALL
,
164 rt2x00lib_intf_scheduled_iter
,
168 static void rt2x00lib_autowakeup(struct work_struct
*work
)
170 struct rt2x00_dev
*rt2x00dev
=
171 container_of(work
, struct rt2x00_dev
, autowakeup_work
.work
);
173 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
176 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_AWAKE
))
177 rt2x00_err(rt2x00dev
, "Device failed to wakeup\n");
178 clear_bit(CONFIG_POWERSAVING
, &rt2x00dev
->flags
);
182 * Interrupt context handlers.
184 static void rt2x00lib_bc_buffer_iter(void *data
, u8
*mac
,
185 struct ieee80211_vif
*vif
)
187 struct ieee80211_tx_control control
= {};
188 struct rt2x00_dev
*rt2x00dev
= data
;
192 * Only AP mode interfaces do broad- and multicast buffering
194 if (vif
->type
!= NL80211_IFTYPE_AP
)
198 * Send out buffered broad- and multicast frames
200 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
202 rt2x00mac_tx(rt2x00dev
->hw
, &control
, skb
);
203 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
207 static void rt2x00lib_beaconupdate_iter(void *data
, u8
*mac
,
208 struct ieee80211_vif
*vif
)
210 struct rt2x00_dev
*rt2x00dev
= data
;
212 if (vif
->type
!= NL80211_IFTYPE_AP
&&
213 vif
->type
!= NL80211_IFTYPE_ADHOC
&&
214 vif
->type
!= NL80211_IFTYPE_MESH_POINT
&&
215 vif
->type
!= NL80211_IFTYPE_WDS
)
219 * Update the beacon without locking. This is safe on PCI devices
220 * as they only update the beacon periodically here. This should
221 * never be called for USB devices.
223 WARN_ON(rt2x00_is_usb(rt2x00dev
));
224 rt2x00queue_update_beacon(rt2x00dev
, vif
);
227 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
229 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
232 /* send buffered bc/mc frames out for every bssid */
233 ieee80211_iterate_active_interfaces_atomic(
234 rt2x00dev
->hw
, IEEE80211_IFACE_ITER_RESUME_ALL
,
235 rt2x00lib_bc_buffer_iter
, rt2x00dev
);
237 * Devices with pre tbtt interrupt don't need to update the beacon
238 * here as they will fetch the next beacon directly prior to
241 if (rt2x00_has_cap_pre_tbtt_interrupt(rt2x00dev
))
244 /* fetch next beacon */
245 ieee80211_iterate_active_interfaces_atomic(
246 rt2x00dev
->hw
, IEEE80211_IFACE_ITER_RESUME_ALL
,
247 rt2x00lib_beaconupdate_iter
, rt2x00dev
);
249 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
251 void rt2x00lib_pretbtt(struct rt2x00_dev
*rt2x00dev
)
253 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
256 /* fetch next beacon */
257 ieee80211_iterate_active_interfaces_atomic(
258 rt2x00dev
->hw
, IEEE80211_IFACE_ITER_RESUME_ALL
,
259 rt2x00lib_beaconupdate_iter
, rt2x00dev
);
261 EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt
);
263 void rt2x00lib_dmastart(struct queue_entry
*entry
)
265 set_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
266 rt2x00queue_index_inc(entry
, Q_INDEX
);
268 EXPORT_SYMBOL_GPL(rt2x00lib_dmastart
);
270 void rt2x00lib_dmadone(struct queue_entry
*entry
)
272 set_bit(ENTRY_DATA_STATUS_PENDING
, &entry
->flags
);
273 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
274 rt2x00queue_index_inc(entry
, Q_INDEX_DMA_DONE
);
276 EXPORT_SYMBOL_GPL(rt2x00lib_dmadone
);
278 static inline int rt2x00lib_txdone_bar_status(struct queue_entry
*entry
)
280 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
281 struct ieee80211_bar
*bar
= (void *) entry
->skb
->data
;
282 struct rt2x00_bar_list_entry
*bar_entry
;
285 if (likely(!ieee80211_is_back_req(bar
->frame_control
)))
289 * Unlike all other frames, the status report for BARs does
290 * not directly come from the hardware as it is incapable of
291 * matching a BA to a previously send BAR. The hardware will
292 * report all BARs as if they weren't acked at all.
294 * Instead the RX-path will scan for incoming BAs and set the
295 * block_acked flag if it sees one that was likely caused by
298 * Remove remaining BARs here and return their status for
299 * TX done processing.
303 list_for_each_entry_rcu(bar_entry
, &rt2x00dev
->bar_list
, list
) {
304 if (bar_entry
->entry
!= entry
)
307 spin_lock_bh(&rt2x00dev
->bar_list_lock
);
308 /* Return whether this BAR was blockacked or not */
309 ret
= bar_entry
->block_acked
;
310 /* Remove the BAR from our checklist */
311 list_del_rcu(&bar_entry
->list
);
312 spin_unlock_bh(&rt2x00dev
->bar_list_lock
);
313 kfree_rcu(bar_entry
, head
);
322 void rt2x00lib_txdone(struct queue_entry
*entry
,
323 struct txdone_entry_desc
*txdesc
)
325 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
326 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
327 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(entry
->skb
);
328 unsigned int header_length
, i
;
329 u8 rate_idx
, rate_flags
, retry_rates
;
330 u8 skbdesc_flags
= skbdesc
->flags
;
336 rt2x00queue_unmap_skb(entry
);
339 * Remove the extra tx headroom from the skb.
341 skb_pull(entry
->skb
, rt2x00dev
->extra_tx_headroom
);
344 * Signal that the TX descriptor is no longer in the skb.
346 skbdesc
->flags
&= ~SKBDESC_DESC_IN_SKB
;
349 * Determine the length of 802.11 header.
351 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
354 * Remove L2 padding which was added during
356 if (rt2x00_has_cap_flag(rt2x00dev
, REQUIRE_L2PAD
))
357 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
360 * If the IV/EIV data was stripped from the frame before it was
361 * passed to the hardware, we should now reinsert it again because
362 * mac80211 will expect the same data to be present it the
363 * frame as it was passed to us.
365 if (rt2x00_has_cap_hw_crypto(rt2x00dev
))
366 rt2x00crypto_tx_insert_iv(entry
->skb
, header_length
);
369 * Send frame to debugfs immediately, after this call is completed
370 * we are going to overwrite the skb->cb array.
372 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TXDONE
, entry
->skb
);
375 * Determine if the frame has been successfully transmitted and
376 * remove BARs from our check list while checking for their
380 rt2x00lib_txdone_bar_status(entry
) ||
381 test_bit(TXDONE_SUCCESS
, &txdesc
->flags
) ||
382 test_bit(TXDONE_UNKNOWN
, &txdesc
->flags
);
385 * Update TX statistics.
387 rt2x00dev
->link
.qual
.tx_success
+= success
;
388 rt2x00dev
->link
.qual
.tx_failed
+= !success
;
390 rate_idx
= skbdesc
->tx_rate_idx
;
391 rate_flags
= skbdesc
->tx_rate_flags
;
392 retry_rates
= test_bit(TXDONE_FALLBACK
, &txdesc
->flags
) ?
393 (txdesc
->retry
+ 1) : 1;
396 * Initialize TX status
398 memset(&tx_info
->status
, 0, sizeof(tx_info
->status
));
399 tx_info
->status
.ack_signal
= 0;
402 * Frame was send with retries, hardware tried
403 * different rates to send out the frame, at each
404 * retry it lowered the rate 1 step except when the
405 * lowest rate was used.
407 for (i
= 0; i
< retry_rates
&& i
< IEEE80211_TX_MAX_RATES
; i
++) {
408 tx_info
->status
.rates
[i
].idx
= rate_idx
- i
;
409 tx_info
->status
.rates
[i
].flags
= rate_flags
;
411 if (rate_idx
- i
== 0) {
413 * The lowest rate (index 0) was used until the
414 * number of max retries was reached.
416 tx_info
->status
.rates
[i
].count
= retry_rates
- i
;
420 tx_info
->status
.rates
[i
].count
= 1;
422 if (i
< (IEEE80211_TX_MAX_RATES
- 1))
423 tx_info
->status
.rates
[i
].idx
= -1; /* terminate */
425 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
427 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
429 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
433 * Every single frame has it's own tx status, hence report
434 * every frame as ampdu of size 1.
436 * TODO: if we can find out how many frames were aggregated
437 * by the hw we could provide the real ampdu_len to mac80211
438 * which would allow the rc algorithm to better decide on
439 * which rates are suitable.
441 if (test_bit(TXDONE_AMPDU
, &txdesc
->flags
) ||
442 tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) {
443 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
444 tx_info
->status
.ampdu_len
= 1;
445 tx_info
->status
.ampdu_ack_len
= success
? 1 : 0;
448 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
451 if (rate_flags
& IEEE80211_TX_RC_USE_RTS_CTS
) {
453 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
455 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
459 * Only send the status report to mac80211 when it's a frame
460 * that originated in mac80211. If this was a extra frame coming
461 * through a mac80211 library call (RTS/CTS) then we should not
462 * send the status report back.
464 if (!(skbdesc_flags
& SKBDESC_NOT_MAC80211
)) {
465 if (rt2x00_has_cap_flag(rt2x00dev
, REQUIRE_TASKLET_CONTEXT
))
466 ieee80211_tx_status(rt2x00dev
->hw
, entry
->skb
);
468 ieee80211_tx_status_ni(rt2x00dev
->hw
, entry
->skb
);
470 dev_kfree_skb_any(entry
->skb
);
473 * Make this entry available for reuse.
478 rt2x00dev
->ops
->lib
->clear_entry(entry
);
480 rt2x00queue_index_inc(entry
, Q_INDEX_DONE
);
483 * If the data queue was below the threshold before the txdone
484 * handler we must make sure the packet queue in the mac80211 stack
485 * is reenabled when the txdone handler has finished. This has to be
486 * serialized with rt2x00mac_tx(), otherwise we can wake up queue
487 * before it was stopped.
489 spin_lock_bh(&entry
->queue
->tx_lock
);
490 if (!rt2x00queue_threshold(entry
->queue
))
491 rt2x00queue_unpause_queue(entry
->queue
);
492 spin_unlock_bh(&entry
->queue
->tx_lock
);
494 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
496 void rt2x00lib_txdone_noinfo(struct queue_entry
*entry
, u32 status
)
498 struct txdone_entry_desc txdesc
;
501 __set_bit(status
, &txdesc
.flags
);
504 rt2x00lib_txdone(entry
, &txdesc
);
506 EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo
);
508 static u8
*rt2x00lib_find_ie(u8
*data
, unsigned int len
, u8 ie
)
510 struct ieee80211_mgmt
*mgmt
= (void *)data
;
513 pos
= (u8
*)mgmt
->u
.beacon
.variable
;
516 if (pos
+ 2 + pos
[1] > end
)
528 static void rt2x00lib_sleep(struct work_struct
*work
)
530 struct rt2x00_dev
*rt2x00dev
=
531 container_of(work
, struct rt2x00_dev
, sleep_work
);
533 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
537 * Check again is powersaving is enabled, to prevent races from delayed
540 if (!test_bit(CONFIG_POWERSAVING
, &rt2x00dev
->flags
))
541 rt2x00lib_config(rt2x00dev
, &rt2x00dev
->hw
->conf
,
542 IEEE80211_CONF_CHANGE_PS
);
545 static void rt2x00lib_rxdone_check_ba(struct rt2x00_dev
*rt2x00dev
,
547 struct rxdone_entry_desc
*rxdesc
)
549 struct rt2x00_bar_list_entry
*entry
;
550 struct ieee80211_bar
*ba
= (void *)skb
->data
;
552 if (likely(!ieee80211_is_back(ba
->frame_control
)))
555 if (rxdesc
->size
< sizeof(*ba
) + FCS_LEN
)
559 list_for_each_entry_rcu(entry
, &rt2x00dev
->bar_list
, list
) {
561 if (ba
->start_seq_num
!= entry
->start_seq_num
)
564 #define TID_CHECK(a, b) ( \
565 ((a) & cpu_to_le16(IEEE80211_BAR_CTRL_TID_INFO_MASK)) == \
566 ((b) & cpu_to_le16(IEEE80211_BAR_CTRL_TID_INFO_MASK))) \
568 if (!TID_CHECK(ba->control, entry->control))
573 if (!ether_addr_equal_64bits(ba
->ra
, entry
->ta
))
576 if (!ether_addr_equal_64bits(ba
->ta
, entry
->ra
))
579 /* Mark BAR since we received the according BA */
580 spin_lock_bh(&rt2x00dev
->bar_list_lock
);
581 entry
->block_acked
= 1;
582 spin_unlock_bh(&rt2x00dev
->bar_list_lock
);
589 static void rt2x00lib_rxdone_check_ps(struct rt2x00_dev
*rt2x00dev
,
591 struct rxdone_entry_desc
*rxdesc
)
593 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
594 struct ieee80211_tim_ie
*tim_ie
;
599 /* If this is not a beacon, or if mac80211 has no powersaving
600 * configured, or if the device is already in powersaving mode
601 * we can exit now. */
602 if (likely(!ieee80211_is_beacon(hdr
->frame_control
) ||
603 !(rt2x00dev
->hw
->conf
.flags
& IEEE80211_CONF_PS
)))
606 /* min. beacon length + FCS_LEN */
607 if (skb
->len
<= 40 + FCS_LEN
)
610 /* and only beacons from the associated BSSID, please */
611 if (!(rxdesc
->dev_flags
& RXDONE_MY_BSS
) ||
615 rt2x00dev
->last_beacon
= jiffies
;
617 tim
= rt2x00lib_find_ie(skb
->data
, skb
->len
- FCS_LEN
, WLAN_EID_TIM
);
621 if (tim
[1] < sizeof(*tim_ie
))
625 tim_ie
= (struct ieee80211_tim_ie
*) &tim
[2];
627 /* Check whenever the PHY can be turned off again. */
629 /* 1. What about buffered unicast traffic for our AID? */
630 cam
= ieee80211_check_tim(tim_ie
, tim_len
, rt2x00dev
->aid
);
632 /* 2. Maybe the AP wants to send multicast/broadcast data? */
633 cam
|= (tim_ie
->bitmap_ctrl
& 0x01);
635 if (!cam
&& !test_bit(CONFIG_POWERSAVING
, &rt2x00dev
->flags
))
636 queue_work(rt2x00dev
->workqueue
, &rt2x00dev
->sleep_work
);
639 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev
*rt2x00dev
,
640 struct rxdone_entry_desc
*rxdesc
)
642 struct ieee80211_supported_band
*sband
;
643 const struct rt2x00_rate
*rate
;
645 int signal
= rxdesc
->signal
;
646 int type
= (rxdesc
->dev_flags
& RXDONE_SIGNAL_MASK
);
648 switch (rxdesc
->rate_mode
) {
652 * For non-HT rates the MCS value needs to contain the
653 * actually used rate modulation (CCK or OFDM).
655 if (rxdesc
->dev_flags
& RXDONE_SIGNAL_MCS
)
656 signal
= RATE_MCS(rxdesc
->rate_mode
, signal
);
658 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
659 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
660 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
661 if (((type
== RXDONE_SIGNAL_PLCP
) &&
662 (rate
->plcp
== signal
)) ||
663 ((type
== RXDONE_SIGNAL_BITRATE
) &&
664 (rate
->bitrate
== signal
)) ||
665 ((type
== RXDONE_SIGNAL_MCS
) &&
666 (rate
->mcs
== signal
))) {
671 case RATE_MODE_HT_MIX
:
672 case RATE_MODE_HT_GREENFIELD
:
673 if (signal
>= 0 && signal
<= 76)
680 rt2x00_warn(rt2x00dev
, "Frame received with unrecognized signal, mode=0x%.4x, signal=0x%.4x, type=%d\n",
681 rxdesc
->rate_mode
, signal
, type
);
685 void rt2x00lib_rxdone(struct queue_entry
*entry
, gfp_t gfp
)
687 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
688 struct rxdone_entry_desc rxdesc
;
690 struct ieee80211_rx_status
*rx_status
;
691 unsigned int header_length
;
694 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
) ||
695 !test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
698 if (test_bit(ENTRY_DATA_IO_FAILED
, &entry
->flags
))
702 * Allocate a new sk_buffer. If no new buffer available, drop the
703 * received frame and reuse the existing buffer.
705 skb
= rt2x00queue_alloc_rxskb(entry
, gfp
);
712 rt2x00queue_unmap_skb(entry
);
715 * Extract the RXD details.
717 memset(&rxdesc
, 0, sizeof(rxdesc
));
718 rt2x00dev
->ops
->lib
->fill_rxdone(entry
, &rxdesc
);
721 * Check for valid size in case we get corrupted descriptor from
724 if (unlikely(rxdesc
.size
== 0 ||
725 rxdesc
.size
> entry
->queue
->data_size
)) {
726 rt2x00_err(rt2x00dev
, "Wrong frame size %d max %d\n",
727 rxdesc
.size
, entry
->queue
->data_size
);
728 dev_kfree_skb(entry
->skb
);
733 * The data behind the ieee80211 header must be
734 * aligned on a 4 byte boundary.
736 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
739 * Hardware might have stripped the IV/EIV/ICV data,
740 * in that case it is possible that the data was
741 * provided separately (through hardware descriptor)
742 * in which case we should reinsert the data into the frame.
744 if ((rxdesc
.dev_flags
& RXDONE_CRYPTO_IV
) &&
745 (rxdesc
.flags
& RX_FLAG_IV_STRIPPED
))
746 rt2x00crypto_rx_insert_iv(entry
->skb
, header_length
,
748 else if (header_length
&&
749 (rxdesc
.size
> header_length
) &&
750 (rxdesc
.dev_flags
& RXDONE_L2PAD
))
751 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
753 /* Trim buffer to correct size */
754 skb_trim(entry
->skb
, rxdesc
.size
);
757 * Translate the signal to the correct bitrate index.
759 rate_idx
= rt2x00lib_rxdone_read_signal(rt2x00dev
, &rxdesc
);
760 if (rxdesc
.rate_mode
== RATE_MODE_HT_MIX
||
761 rxdesc
.rate_mode
== RATE_MODE_HT_GREENFIELD
)
762 rxdesc
.flags
|= RX_FLAG_HT
;
765 * Check if this is a beacon, and more frames have been
766 * buffered while we were in powersaving mode.
768 rt2x00lib_rxdone_check_ps(rt2x00dev
, entry
->skb
, &rxdesc
);
771 * Check for incoming BlockAcks to match to the BlockAckReqs
774 rt2x00lib_rxdone_check_ba(rt2x00dev
, entry
->skb
, &rxdesc
);
777 * Update extra components
779 rt2x00link_update_stats(rt2x00dev
, entry
->skb
, &rxdesc
);
780 rt2x00debug_update_crypto(rt2x00dev
, &rxdesc
);
781 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_RXDONE
, entry
->skb
);
784 * Initialize RX status information, and send frame
787 rx_status
= IEEE80211_SKB_RXCB(entry
->skb
);
789 /* Ensure that all fields of rx_status are initialized
790 * properly. The skb->cb array was used for driver
791 * specific informations, so rx_status might contain
794 memset(rx_status
, 0, sizeof(*rx_status
));
796 rx_status
->mactime
= rxdesc
.timestamp
;
797 rx_status
->band
= rt2x00dev
->curr_band
;
798 rx_status
->freq
= rt2x00dev
->curr_freq
;
799 rx_status
->rate_idx
= rate_idx
;
800 rx_status
->signal
= rxdesc
.rssi
;
801 rx_status
->flag
= rxdesc
.flags
;
802 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
804 ieee80211_rx_ni(rt2x00dev
->hw
, entry
->skb
);
808 * Replace the skb with the freshly allocated one.
814 rt2x00queue_index_inc(entry
, Q_INDEX_DONE
);
815 if (test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
) &&
816 test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
817 rt2x00dev
->ops
->lib
->clear_entry(entry
);
819 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
822 * Driver initialization handlers.
824 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
826 .flags
= DEV_RATE_CCK
,
830 .mcs
= RATE_MCS(RATE_MODE_CCK
, 0),
833 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
837 .mcs
= RATE_MCS(RATE_MODE_CCK
, 1),
840 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
844 .mcs
= RATE_MCS(RATE_MODE_CCK
, 2),
847 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
851 .mcs
= RATE_MCS(RATE_MODE_CCK
, 3),
854 .flags
= DEV_RATE_OFDM
,
858 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 0),
861 .flags
= DEV_RATE_OFDM
,
865 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 1),
868 .flags
= DEV_RATE_OFDM
,
872 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 2),
875 .flags
= DEV_RATE_OFDM
,
879 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 3),
882 .flags
= DEV_RATE_OFDM
,
886 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 4),
889 .flags
= DEV_RATE_OFDM
,
893 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 5),
896 .flags
= DEV_RATE_OFDM
,
900 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 6),
903 .flags
= DEV_RATE_OFDM
,
907 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 7),
911 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
912 const int channel
, const int tx_power
,
915 /* XXX: this assumption about the band is wrong for 802.11j */
916 entry
->band
= channel
<= 14 ? NL80211_BAND_2GHZ
: NL80211_BAND_5GHZ
;
917 entry
->center_freq
= ieee80211_channel_to_frequency(channel
,
919 entry
->hw_value
= value
;
920 entry
->max_power
= tx_power
;
921 entry
->max_antenna_gain
= 0xff;
924 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
925 const u16 index
, const struct rt2x00_rate
*rate
)
928 entry
->bitrate
= rate
->bitrate
;
929 entry
->hw_value
= index
;
930 entry
->hw_value_short
= index
;
932 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
)
933 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
936 void rt2x00lib_set_mac_address(struct rt2x00_dev
*rt2x00dev
, u8
*eeprom_mac_addr
)
938 const char *mac_addr
;
940 mac_addr
= of_get_mac_address(rt2x00dev
->dev
->of_node
);
942 ether_addr_copy(eeprom_mac_addr
, mac_addr
);
944 if (!is_valid_ether_addr(eeprom_mac_addr
)) {
945 eth_random_addr(eeprom_mac_addr
);
946 rt2x00_eeprom_dbg(rt2x00dev
, "MAC: %pM\n", eeprom_mac_addr
);
949 EXPORT_SYMBOL_GPL(rt2x00lib_set_mac_address
);
951 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
952 struct hw_mode_spec
*spec
)
954 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
955 struct ieee80211_channel
*channels
;
956 struct ieee80211_rate
*rates
;
957 unsigned int num_rates
;
961 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
963 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
966 channels
= kcalloc(spec
->num_channels
, sizeof(*channels
), GFP_KERNEL
);
970 rates
= kcalloc(num_rates
, sizeof(*rates
), GFP_KERNEL
);
972 goto exit_free_channels
;
975 * Initialize Rate list.
977 for (i
= 0; i
< num_rates
; i
++)
978 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
981 * Initialize Channel list.
983 for (i
= 0; i
< spec
->num_channels
; i
++) {
984 rt2x00lib_channel(&channels
[i
],
985 spec
->channels
[i
].channel
,
986 spec
->channels_info
[i
].max_power
, i
);
990 * Intitialize 802.11b, 802.11g
994 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
995 rt2x00dev
->bands
[NL80211_BAND_2GHZ
].n_channels
= 14;
996 rt2x00dev
->bands
[NL80211_BAND_2GHZ
].n_bitrates
= num_rates
;
997 rt2x00dev
->bands
[NL80211_BAND_2GHZ
].channels
= channels
;
998 rt2x00dev
->bands
[NL80211_BAND_2GHZ
].bitrates
= rates
;
999 hw
->wiphy
->bands
[NL80211_BAND_2GHZ
] =
1000 &rt2x00dev
->bands
[NL80211_BAND_2GHZ
];
1001 memcpy(&rt2x00dev
->bands
[NL80211_BAND_2GHZ
].ht_cap
,
1002 &spec
->ht
, sizeof(spec
->ht
));
1006 * Intitialize 802.11a
1008 * Channels: OFDM, UNII, HiperLAN2.
1010 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
1011 rt2x00dev
->bands
[NL80211_BAND_5GHZ
].n_channels
=
1012 spec
->num_channels
- 14;
1013 rt2x00dev
->bands
[NL80211_BAND_5GHZ
].n_bitrates
=
1015 rt2x00dev
->bands
[NL80211_BAND_5GHZ
].channels
= &channels
[14];
1016 rt2x00dev
->bands
[NL80211_BAND_5GHZ
].bitrates
= &rates
[4];
1017 hw
->wiphy
->bands
[NL80211_BAND_5GHZ
] =
1018 &rt2x00dev
->bands
[NL80211_BAND_5GHZ
];
1019 memcpy(&rt2x00dev
->bands
[NL80211_BAND_5GHZ
].ht_cap
,
1020 &spec
->ht
, sizeof(spec
->ht
));
1027 rt2x00_err(rt2x00dev
, "Allocation ieee80211 modes failed\n");
1031 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
1033 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
1034 ieee80211_unregister_hw(rt2x00dev
->hw
);
1036 if (likely(rt2x00dev
->hw
->wiphy
->bands
[NL80211_BAND_2GHZ
])) {
1037 kfree(rt2x00dev
->hw
->wiphy
->bands
[NL80211_BAND_2GHZ
]->channels
);
1038 kfree(rt2x00dev
->hw
->wiphy
->bands
[NL80211_BAND_2GHZ
]->bitrates
);
1039 rt2x00dev
->hw
->wiphy
->bands
[NL80211_BAND_2GHZ
] = NULL
;
1040 rt2x00dev
->hw
->wiphy
->bands
[NL80211_BAND_5GHZ
] = NULL
;
1043 kfree(rt2x00dev
->spec
.channels_info
);
1046 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
1048 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
1051 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
1055 * Initialize HW modes.
1057 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
1062 * Initialize HW fields.
1064 rt2x00dev
->hw
->queues
= rt2x00dev
->ops
->tx_queues
;
1067 * Initialize extra TX headroom required.
1069 rt2x00dev
->hw
->extra_tx_headroom
=
1070 max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM
,
1071 rt2x00dev
->extra_tx_headroom
);
1074 * Take TX headroom required for alignment into account.
1076 if (rt2x00_has_cap_flag(rt2x00dev
, REQUIRE_L2PAD
))
1077 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_L2PAD_SIZE
;
1078 else if (rt2x00_has_cap_flag(rt2x00dev
, REQUIRE_DMA
))
1079 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_ALIGN_SIZE
;
1082 * Tell mac80211 about the size of our private STA structure.
1084 rt2x00dev
->hw
->sta_data_size
= sizeof(struct rt2x00_sta
);
1087 * Allocate tx status FIFO for driver use.
1089 if (rt2x00_has_cap_flag(rt2x00dev
, REQUIRE_TXSTATUS_FIFO
)) {
1091 * Allocate the txstatus fifo. In the worst case the tx
1092 * status fifo has to hold the tx status of all entries
1093 * in all tx queues. Hence, calculate the kfifo size as
1094 * tx_queues * entry_num and round up to the nearest
1098 roundup_pow_of_two(rt2x00dev
->ops
->tx_queues
*
1099 rt2x00dev
->tx
->limit
*
1102 status
= kfifo_alloc(&rt2x00dev
->txstatus_fifo
, kfifo_size
,
1109 * Initialize tasklets if used by the driver. Tasklets are
1110 * disabled until the interrupts are turned on. The driver
1111 * has to handle that.
1113 #define RT2X00_TASKLET_INIT(taskletname) \
1114 if (rt2x00dev->ops->lib->taskletname) { \
1115 tasklet_init(&rt2x00dev->taskletname, \
1116 rt2x00dev->ops->lib->taskletname, \
1117 (unsigned long)rt2x00dev); \
1120 RT2X00_TASKLET_INIT(txstatus_tasklet
);
1121 RT2X00_TASKLET_INIT(pretbtt_tasklet
);
1122 RT2X00_TASKLET_INIT(tbtt_tasklet
);
1123 RT2X00_TASKLET_INIT(rxdone_tasklet
);
1124 RT2X00_TASKLET_INIT(autowake_tasklet
);
1126 #undef RT2X00_TASKLET_INIT
1131 status
= ieee80211_register_hw(rt2x00dev
->hw
);
1135 set_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
);
1141 * Initialization/uninitialization handlers.
1143 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
1145 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
1149 * Stop rfkill polling.
1151 if (rt2x00_has_cap_flag(rt2x00dev
, REQUIRE_DELAYED_RFKILL
))
1152 rt2x00rfkill_unregister(rt2x00dev
);
1155 * Allow the HW to uninitialize.
1157 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
1160 * Free allocated queue entries.
1162 rt2x00queue_uninitialize(rt2x00dev
);
1165 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
1169 if (test_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
1173 * Allocate all queue entries.
1175 status
= rt2x00queue_initialize(rt2x00dev
);
1180 * Initialize the device.
1182 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
1184 rt2x00queue_uninitialize(rt2x00dev
);
1188 set_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
);
1191 * Start rfkill polling.
1193 if (rt2x00_has_cap_flag(rt2x00dev
, REQUIRE_DELAYED_RFKILL
))
1194 rt2x00rfkill_register(rt2x00dev
);
1199 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
1203 if (test_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
1207 * If this is the first interface which is added,
1208 * we should load the firmware now.
1210 retval
= rt2x00lib_load_firmware(rt2x00dev
);
1215 * Initialize the device.
1217 retval
= rt2x00lib_initialize(rt2x00dev
);
1221 rt2x00dev
->intf_ap_count
= 0;
1222 rt2x00dev
->intf_sta_count
= 0;
1223 rt2x00dev
->intf_associated
= 0;
1225 /* Enable the radio */
1226 retval
= rt2x00lib_enable_radio(rt2x00dev
);
1230 set_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
);
1235 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
1237 if (!test_and_clear_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
1241 * Perhaps we can add something smarter here,
1242 * but for now just disabling the radio should do.
1244 rt2x00lib_disable_radio(rt2x00dev
);
1246 rt2x00dev
->intf_ap_count
= 0;
1247 rt2x00dev
->intf_sta_count
= 0;
1248 rt2x00dev
->intf_associated
= 0;
1251 static inline void rt2x00lib_set_if_combinations(struct rt2x00_dev
*rt2x00dev
)
1253 struct ieee80211_iface_limit
*if_limit
;
1254 struct ieee80211_iface_combination
*if_combination
;
1256 if (rt2x00dev
->ops
->max_ap_intf
< 2)
1260 * Build up AP interface limits structure.
1262 if_limit
= &rt2x00dev
->if_limits_ap
;
1263 if_limit
->max
= rt2x00dev
->ops
->max_ap_intf
;
1264 if_limit
->types
= BIT(NL80211_IFTYPE_AP
);
1265 #ifdef CONFIG_MAC80211_MESH
1266 if_limit
->types
|= BIT(NL80211_IFTYPE_MESH_POINT
);
1270 * Build up AP interface combinations structure.
1272 if_combination
= &rt2x00dev
->if_combinations
[IF_COMB_AP
];
1273 if_combination
->limits
= if_limit
;
1274 if_combination
->n_limits
= 1;
1275 if_combination
->max_interfaces
= if_limit
->max
;
1276 if_combination
->num_different_channels
= 1;
1279 * Finally, specify the possible combinations to mac80211.
1281 rt2x00dev
->hw
->wiphy
->iface_combinations
= rt2x00dev
->if_combinations
;
1282 rt2x00dev
->hw
->wiphy
->n_iface_combinations
= 1;
1285 static unsigned int rt2x00dev_extra_tx_headroom(struct rt2x00_dev
*rt2x00dev
)
1287 if (WARN_ON(!rt2x00dev
->tx
))
1290 if (rt2x00_is_usb(rt2x00dev
))
1291 return rt2x00dev
->tx
[0].winfo_size
+ rt2x00dev
->tx
[0].desc_size
;
1293 return rt2x00dev
->tx
[0].winfo_size
;
1297 * driver allocation handlers.
1299 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
1301 int retval
= -ENOMEM
;
1304 * Set possible interface combinations.
1306 rt2x00lib_set_if_combinations(rt2x00dev
);
1309 * Allocate the driver data memory, if necessary.
1311 if (rt2x00dev
->ops
->drv_data_size
> 0) {
1312 rt2x00dev
->drv_data
= kzalloc(rt2x00dev
->ops
->drv_data_size
,
1314 if (!rt2x00dev
->drv_data
) {
1320 spin_lock_init(&rt2x00dev
->irqmask_lock
);
1321 mutex_init(&rt2x00dev
->csr_mutex
);
1322 INIT_LIST_HEAD(&rt2x00dev
->bar_list
);
1323 spin_lock_init(&rt2x00dev
->bar_list_lock
);
1325 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1328 * Make room for rt2x00_intf inside the per-interface
1329 * structure ieee80211_vif.
1331 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
1334 * rt2x00 devices can only use the last n bits of the MAC address
1335 * for virtual interfaces.
1337 rt2x00dev
->hw
->wiphy
->addr_mask
[ETH_ALEN
- 1] =
1338 (rt2x00dev
->ops
->max_ap_intf
- 1);
1343 rt2x00dev
->workqueue
=
1344 alloc_ordered_workqueue("%s", 0, wiphy_name(rt2x00dev
->hw
->wiphy
));
1345 if (!rt2x00dev
->workqueue
) {
1350 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
1351 INIT_DELAYED_WORK(&rt2x00dev
->autowakeup_work
, rt2x00lib_autowakeup
);
1352 INIT_WORK(&rt2x00dev
->sleep_work
, rt2x00lib_sleep
);
1355 * Let the driver probe the device to detect the capabilities.
1357 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
1359 rt2x00_err(rt2x00dev
, "Failed to allocate device\n");
1364 * Allocate queue array.
1366 retval
= rt2x00queue_allocate(rt2x00dev
);
1370 /* Cache TX headroom value */
1371 rt2x00dev
->extra_tx_headroom
= rt2x00dev_extra_tx_headroom(rt2x00dev
);
1374 * Determine which operating modes are supported, all modes
1375 * which require beaconing, depend on the availability of
1378 rt2x00dev
->hw
->wiphy
->interface_modes
= BIT(NL80211_IFTYPE_STATION
);
1379 if (rt2x00dev
->bcn
->limit
> 0)
1380 rt2x00dev
->hw
->wiphy
->interface_modes
|=
1381 BIT(NL80211_IFTYPE_ADHOC
) |
1382 #ifdef CONFIG_MAC80211_MESH
1383 BIT(NL80211_IFTYPE_MESH_POINT
) |
1385 #ifdef CONFIG_WIRELESS_WDS
1386 BIT(NL80211_IFTYPE_WDS
) |
1388 BIT(NL80211_IFTYPE_AP
);
1390 rt2x00dev
->hw
->wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
1393 * Initialize ieee80211 structure.
1395 retval
= rt2x00lib_probe_hw(rt2x00dev
);
1397 rt2x00_err(rt2x00dev
, "Failed to initialize hw\n");
1402 * Register extra components.
1404 rt2x00link_register(rt2x00dev
);
1405 rt2x00leds_register(rt2x00dev
);
1406 rt2x00debug_register(rt2x00dev
);
1409 * Start rfkill polling.
1411 if (!rt2x00_has_cap_flag(rt2x00dev
, REQUIRE_DELAYED_RFKILL
))
1412 rt2x00rfkill_register(rt2x00dev
);
1417 rt2x00lib_remove_dev(rt2x00dev
);
1421 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
1423 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
1425 clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1428 * Stop rfkill polling.
1430 if (!rt2x00_has_cap_flag(rt2x00dev
, REQUIRE_DELAYED_RFKILL
))
1431 rt2x00rfkill_unregister(rt2x00dev
);
1436 rt2x00lib_disable_radio(rt2x00dev
);
1441 cancel_work_sync(&rt2x00dev
->intf_work
);
1442 cancel_delayed_work_sync(&rt2x00dev
->autowakeup_work
);
1443 cancel_work_sync(&rt2x00dev
->sleep_work
);
1444 #if IS_ENABLED(CONFIG_RT2X00_LIB_USB)
1445 if (rt2x00_is_usb(rt2x00dev
)) {
1446 usb_kill_anchored_urbs(rt2x00dev
->anchor
);
1447 hrtimer_cancel(&rt2x00dev
->txstatus_timer
);
1448 cancel_work_sync(&rt2x00dev
->rxdone_work
);
1449 cancel_work_sync(&rt2x00dev
->txdone_work
);
1452 if (rt2x00dev
->workqueue
)
1453 destroy_workqueue(rt2x00dev
->workqueue
);
1456 * Free the tx status fifo.
1458 kfifo_free(&rt2x00dev
->txstatus_fifo
);
1461 * Kill the tx status tasklet.
1463 tasklet_kill(&rt2x00dev
->txstatus_tasklet
);
1464 tasklet_kill(&rt2x00dev
->pretbtt_tasklet
);
1465 tasklet_kill(&rt2x00dev
->tbtt_tasklet
);
1466 tasklet_kill(&rt2x00dev
->rxdone_tasklet
);
1467 tasklet_kill(&rt2x00dev
->autowake_tasklet
);
1470 * Uninitialize device.
1472 rt2x00lib_uninitialize(rt2x00dev
);
1475 * Free extra components
1477 rt2x00debug_deregister(rt2x00dev
);
1478 rt2x00leds_unregister(rt2x00dev
);
1481 * Free ieee80211_hw memory.
1483 rt2x00lib_remove_hw(rt2x00dev
);
1486 * Free firmware image.
1488 rt2x00lib_free_firmware(rt2x00dev
);
1491 * Free queue structures.
1493 rt2x00queue_free(rt2x00dev
);
1496 * Free the driver data.
1498 kfree(rt2x00dev
->drv_data
);
1500 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
1503 * Device state handlers
1506 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
1508 rt2x00_dbg(rt2x00dev
, "Going to sleep\n");
1511 * Prevent mac80211 from accessing driver while suspended.
1513 if (!test_and_clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
1517 * Cleanup as much as possible.
1519 rt2x00lib_uninitialize(rt2x00dev
);
1522 * Suspend/disable extra components.
1524 rt2x00leds_suspend(rt2x00dev
);
1525 rt2x00debug_deregister(rt2x00dev
);
1528 * Set device mode to sleep for power management,
1529 * on some hardware this call seems to consistently fail.
1530 * From the specifications it is hard to tell why it fails,
1531 * and if this is a "bad thing".
1532 * Overall it is safe to just ignore the failure and
1533 * continue suspending. The only downside is that the
1534 * device will not be in optimal power save mode, but with
1535 * the radio and the other components already disabled the
1536 * device is as good as disabled.
1538 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
))
1539 rt2x00_warn(rt2x00dev
, "Device failed to enter sleep state, continue suspending\n");
1543 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1545 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1547 rt2x00_dbg(rt2x00dev
, "Waking up\n");
1550 * Restore/enable extra components.
1552 rt2x00debug_register(rt2x00dev
);
1553 rt2x00leds_resume(rt2x00dev
);
1556 * We are ready again to receive requests from mac80211.
1558 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1562 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1563 #endif /* CONFIG_PM */
1566 * rt2x00lib module information.
1568 MODULE_AUTHOR(DRV_PROJECT
);
1569 MODULE_VERSION(DRV_VERSION
);
1570 MODULE_DESCRIPTION("rt2x00 library");
1571 MODULE_LICENSE("GPL");