2 * Copyright (c) 2008-2009 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #include <linux/etherdevice.h>
21 #include <linux/device.h>
22 #include <net/mac80211.h>
23 #include <linux/leds.h>
24 #include <linux/rfkill.h>
32 /* Macro to expand scalars to 64-bit objects */
34 #define ito64(x) (sizeof(x) == 8) ? \
35 (((unsigned long long int)(x)) & (0xff)) : \
37 (((unsigned long long int)(x)) & 0xffff) : \
38 ((sizeof(x) == 32) ? \
39 (((unsigned long long int)(x)) & 0xffffffff) : \
40 (unsigned long long int)(x))
42 /* increment with wrap-around */
43 #define INCR(_l, _sz) do { \
45 (_l) &= ((_sz) - 1); \
48 /* decrement with wrap-around */
49 #define DECR(_l, _sz) do { \
51 (_l) &= ((_sz) - 1); \
54 #define A_MAX(a, b) ((a) > (b) ? (a) : (b))
56 #define ASSERT(exp) do { \
57 if (unlikely(!(exp))) { \
62 #define TSF_TO_TU(_h,_l) \
63 ((((u32)(_h)) << 22) | (((u32)(_l)) >> 10))
65 #define ATH_TXQ_SETUP(sc, i) ((sc)->tx.txqsetup & (1<<i))
67 static const u8 ath_bcast_mac[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
76 /*************************/
77 /* Descriptor Management */
78 /*************************/
80 #define ATH_TXBUF_RESET(_bf) do { \
81 (_bf)->bf_status = 0; \
82 (_bf)->bf_lastbf = NULL; \
83 (_bf)->bf_next = NULL; \
84 memset(&((_bf)->bf_state), 0, \
85 sizeof(struct ath_buf_state)); \
89 * enum buffer_type - Buffer type flags
91 * @BUF_HT: Send this buffer using HT capabilities
92 * @BUF_AMPDU: This buffer is an ampdu, as part of an aggregate (during TX)
93 * @BUF_AGGR: Indicates whether the buffer can be aggregated
94 * (used in aggregation scheduling)
95 * @BUF_RETRY: Indicates whether the buffer is retried
96 * @BUF_XRETRY: To denote excessive retries of the buffer
106 struct ath_buf_state {
115 enum ath9k_key_type bfs_keytype;
118 #define bf_nframes bf_state.bfs_nframes
119 #define bf_al bf_state.bfs_al
120 #define bf_frmlen bf_state.bfs_frmlen
121 #define bf_retries bf_state.bfs_retries
122 #define bf_seqno bf_state.bfs_seqno
123 #define bf_tidno bf_state.bfs_tidno
124 #define bf_keyix bf_state.bfs_keyix
125 #define bf_keytype bf_state.bfs_keytype
126 #define bf_isht(bf) (bf->bf_state.bf_type & BUF_HT)
127 #define bf_isampdu(bf) (bf->bf_state.bf_type & BUF_AMPDU)
128 #define bf_isaggr(bf) (bf->bf_state.bf_type & BUF_AGGR)
129 #define bf_isretried(bf) (bf->bf_state.bf_type & BUF_RETRY)
130 #define bf_isxretried(bf) (bf->bf_state.bf_type & BUF_XRETRY)
133 struct list_head list;
134 struct ath_buf *bf_lastbf; /* last buf of this unit (a frame or
136 struct ath_buf *bf_next; /* next subframe in the aggregate */
137 void *bf_mpdu; /* enclosing frame structure */
138 struct ath_desc *bf_desc; /* virtual addr of desc */
139 dma_addr_t bf_daddr; /* physical addr of desc */
140 dma_addr_t bf_buf_addr; /* physical addr of data buffer */
143 struct ath_buf_state bf_state;
144 dma_addr_t bf_dmacontext;
147 #define ATH_RXBUF_RESET(_bf) ((_bf)->bf_status = 0)
148 #define ATH_BUFSTATUS_STALE 0x00000002
152 struct ath_desc *dd_desc;
153 dma_addr_t dd_desc_paddr;
155 struct ath_buf *dd_bufptr;
156 dma_addr_t dd_dmacontext;
159 int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
160 struct list_head *head, const char *name,
161 int nbuf, int ndesc);
162 void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *dd,
163 struct list_head *head);
169 #define ATH_MAX_ANTENNA 3
170 #define ATH_RXBUF 512
171 #define WME_NUM_TID 16
172 #define ATH_TXBUF 512
173 #define ATH_TXMAXTRY 13
174 #define ATH_11N_TXMAXTRY 10
175 #define ATH_MGT_TXMAXTRY 4
176 #define WME_BA_BMP_SIZE 64
177 #define WME_MAX_BA WME_BA_BMP_SIZE
178 #define ATH_TID_MAX_BUFS (2 * WME_MAX_BA)
180 #define TID_TO_WME_AC(_tid) \
181 ((((_tid) == 0) || ((_tid) == 3)) ? WME_AC_BE : \
182 (((_tid) == 1) || ((_tid) == 2)) ? WME_AC_BK : \
183 (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI : \
192 #define ADDBA_EXCHANGE_ATTEMPTS 10
193 #define ATH_AGGR_DELIM_SZ 4
194 #define ATH_AGGR_MINPLEN 256 /* in bytes, minimum packet length */
195 /* number of delimiters for encryption padding */
196 #define ATH_AGGR_ENCRYPTDELIM 10
197 /* minimum h/w qdepth to be sustained to maximize aggregation */
198 #define ATH_AGGR_MIN_QDEPTH 2
199 #define ATH_AMPDU_SUBFRAME_DEFAULT 32
200 #define ATH_AMPDU_LIMIT_MAX (64 * 1024 - 1)
201 #define ATH_AMPDU_LIMIT_DEFAULT ATH_AMPDU_LIMIT_MAX
203 #define IEEE80211_SEQ_SEQ_SHIFT 4
204 #define IEEE80211_SEQ_MAX 4096
205 #define IEEE80211_MIN_AMPDU_BUF 0x8
206 #define IEEE80211_HTCAP_MAXRXAMPDU_FACTOR 13
207 #define IEEE80211_WEP_IVLEN 3
208 #define IEEE80211_WEP_KIDLEN 1
209 #define IEEE80211_WEP_CRCLEN 4
210 #define IEEE80211_MAX_MPDU_LEN (3840 + FCS_LEN + \
211 (IEEE80211_WEP_IVLEN + \
212 IEEE80211_WEP_KIDLEN + \
213 IEEE80211_WEP_CRCLEN))
215 /* return whether a bit at index _n in bitmap _bm is set
216 * _sz is the size of the bitmap */
217 #define ATH_BA_ISSET(_bm, _n) (((_n) < (WME_BA_BMP_SIZE)) && \
218 ((_bm)[(_n) >> 5] & (1 << ((_n) & 31))))
220 /* return block-ack bitmap index given sequence and starting sequence */
221 #define ATH_BA_INDEX(_st, _seq) (((_seq) - (_st)) & (IEEE80211_SEQ_MAX - 1))
223 /* returns delimiter padding required given the packet length */
224 #define ATH_AGGR_GET_NDELIM(_len) \
225 (((((_len) + ATH_AGGR_DELIM_SZ) < ATH_AGGR_MINPLEN) ? \
226 (ATH_AGGR_MINPLEN - (_len) - ATH_AGGR_DELIM_SZ) : 0) >> 2)
228 #define BAW_WITHIN(_start, _bawsz, _seqno) \
229 ((((_seqno) - (_start)) & 4095) < (_bawsz))
231 #define ATH_DS_BA_SEQ(_ds) ((_ds)->ds_us.tx.ts_seqnum)
232 #define ATH_DS_BA_BITMAP(_ds) (&(_ds)->ds_us.tx.ba_low)
233 #define ATH_DS_TX_BA(_ds) ((_ds)->ds_us.tx.ts_flags & ATH9K_TX_BA)
234 #define ATH_AN_2_TID(_an, _tidno) (&(_an)->tid[(_tidno)])
236 enum ATH_AGGR_STATUS {
245 struct list_head axq_q;
251 struct ath_buf *axq_linkbuf;
253 /* first desc of the last descriptor that contains CTS */
254 struct ath_desc *axq_lastdsWithCTS;
256 /* final desc of the gating desc that determines whether
257 lastdsWithCTS has been DMA'ed or not */
258 struct ath_desc *axq_gatingds;
260 struct list_head axq_acq;
263 #define AGGR_CLEANUP BIT(1)
264 #define AGGR_ADDBA_COMPLETE BIT(2)
265 #define AGGR_ADDBA_PROGRESS BIT(3)
268 struct list_head list;
269 struct list_head buf_q;
271 struct ath_atx_ac *ac;
272 struct ath_buf *tx_buf[ATH_TID_MAX_BUFS];
277 int baw_head; /* first un-acked tx buffer */
278 int baw_tail; /* next unused tx buffer slot */
282 int addba_exchangeattempts;
288 struct list_head list;
289 struct list_head tid_q;
292 struct ath_tx_control {
295 enum ath9k_internal_frame_type frame_type;
298 #define ATH_TX_ERROR 0x01
299 #define ATH_TX_XRETRY 0x02
300 #define ATH_TX_BAR 0x04
302 /* All RSSI values are noise floor adjusted */
305 int rssictl[ATH_MAX_ANTENNA];
306 int rssiextn[ATH_MAX_ANTENNA];
311 u32 airtime; /* time on air per final tx rate */
314 struct aggr_rifs_param {
315 int param_max_frames;
319 struct ath_rc_series *param_rcs;
323 struct ath_softc *an_sc;
324 struct ath_atx_tid tid[WME_NUM_TID];
325 struct ath_atx_ac ac[WME_NUM_AC];
333 int hwq_map[ATH9K_WME_AC_VO+1];
334 spinlock_t txbuflock;
335 struct list_head txbuf;
336 struct ath_txq txq[ATH9K_NUM_TX_QUEUES];
337 struct ath_descdma txdma;
345 unsigned int rxfilter;
346 spinlock_t rxflushlock;
347 spinlock_t rxbuflock;
348 struct list_head rxbuf;
349 struct ath_descdma rxdma;
352 int ath_startrecv(struct ath_softc *sc);
353 bool ath_stoprecv(struct ath_softc *sc);
354 void ath_flushrecv(struct ath_softc *sc);
355 u32 ath_calcrxfilter(struct ath_softc *sc);
356 int ath_rx_init(struct ath_softc *sc, int nbufs);
357 void ath_rx_cleanup(struct ath_softc *sc);
358 int ath_rx_tasklet(struct ath_softc *sc, int flush);
359 struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype);
360 void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq);
361 int ath_tx_setup(struct ath_softc *sc, int haltype);
362 void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx);
363 void ath_draintxq(struct ath_softc *sc,
364 struct ath_txq *txq, bool retry_tx);
365 void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an);
366 void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an);
367 void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq);
368 int ath_tx_init(struct ath_softc *sc, int nbufs);
369 int ath_tx_cleanup(struct ath_softc *sc);
370 struct ath_txq *ath_test_get_txq(struct ath_softc *sc, struct sk_buff *skb);
371 int ath_txq_update(struct ath_softc *sc, int qnum,
372 struct ath9k_tx_queue_info *q);
373 int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
374 struct ath_tx_control *txctl);
375 void ath_tx_tasklet(struct ath_softc *sc);
376 void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb);
377 bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno);
378 int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
380 int ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid);
381 void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid);
389 __le64 tsf_adjust; /* TSF adjustment for staggered beacons */
390 enum nl80211_iftype av_opmode;
391 struct ath_buf *av_bcbuf;
392 struct ath_tx_control av_btxctl;
393 u8 bssid[ETH_ALEN]; /* current BSSID from config_interface */
396 /*******************/
397 /* Beacon Handling */
398 /*******************/
401 * Regardless of the number of beacons we stagger, (i.e. regardless of the
402 * number of BSSIDs) if a given beacon does not go out even after waiting this
403 * number of beacon intervals, the game's up.
405 #define BSTUCK_THRESH (9 * ATH_BCBUF)
407 #define ATH_DEFAULT_BINTVAL 100 /* TU */
408 #define ATH_DEFAULT_BMISS_LIMIT 10
409 #define IEEE80211_MS_TO_TU(x) (((x) * 1000) / 1024)
411 struct ath_beacon_config {
421 OK, /* no change needed */
422 UPDATE, /* update pending */
423 COMMIT /* beacon sent, commit change */
424 } updateslot; /* slot time update fsm */
430 struct ieee80211_vif *bslot[ATH_BCBUF];
431 struct ath_wiphy *bslot_aphy[ATH_BCBUF];
434 struct ath9k_tx_queue_info beacon_qi;
435 struct ath_descdma bdma;
436 struct ath_txq *cabq;
437 struct list_head bbuf;
440 void ath_beacon_tasklet(unsigned long data);
441 void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif);
442 int ath_beaconq_setup(struct ath_hw *ah);
443 int ath_beacon_alloc(struct ath_wiphy *aphy, struct ieee80211_vif *vif);
444 void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp);
450 #define ATH_STA_SHORT_CALINTERVAL 1000 /* 1 second */
451 #define ATH_AP_SHORT_CALINTERVAL 100 /* 100 ms */
452 #define ATH_ANI_POLLINTERVAL 100 /* 100 ms */
453 #define ATH_LONG_CALINTERVAL 30000 /* 30 seconds */
454 #define ATH_RESTART_CALINTERVAL 1200000 /* 20 minutes */
459 unsigned int longcal_timer;
460 unsigned int shortcal_timer;
461 unsigned int resetcal_timer;
462 unsigned int checkani_timer;
463 struct timer_list timer;
466 /********************/
468 /********************/
470 #define ATH_LED_PIN 1
471 #define ATH_LED_ON_DURATION_IDLE 350 /* in msecs */
472 #define ATH_LED_OFF_DURATION_IDLE 250 /* in msecs */
482 struct ath_softc *sc;
483 struct led_classdev led_cdev;
484 enum ath_led_type led_type;
490 #define ATH_RFKILL_POLL_INTERVAL 2000 /* msecs */
493 struct rfkill *rfkill;
494 struct delayed_work rfkill_poll;
495 char rfkill_name[32];
498 /********************/
499 /* Main driver core */
500 /********************/
503 * Default cache line size, in bytes.
504 * Used when PCI device not fully initialized by bootrom/BIOS
506 #define DEFAULT_CACHELINE 32
507 #define ATH_DEFAULT_NOISE_FLOOR -95
508 #define ATH_REGCLASSIDS_MAX 10
509 #define ATH_CABQ_READY_TIME 80 /* % of beacon interval */
510 #define ATH_MAX_SW_RETRIES 10
511 #define ATH_CHAN_MAX 255
512 #define IEEE80211_WEP_NKID 4 /* number of key ids */
515 * The key cache is used for h/w cipher state and also for
516 * tracking station state such as the current tx antenna.
517 * We also setup a mapping table between key cache slot indices
518 * and station state to short-circuit node lookups on rx.
519 * Different parts have different size key caches. We handle
520 * up to ATH_KEYMAX entries (could dynamically allocate state).
522 #define ATH_KEYMAX 128 /* max key cache size we handle */
524 #define ATH_TXPOWER_MAX 100 /* .5 dBm units */
525 #define ATH_RSSI_DUMMY_MARKER 0x127
526 #define ATH_RATE_DUMMY_MARKER 0
528 #define SC_OP_INVALID BIT(0)
529 #define SC_OP_BEACONS BIT(1)
530 #define SC_OP_RXAGGR BIT(2)
531 #define SC_OP_TXAGGR BIT(3)
532 #define SC_OP_CHAINMASK_UPDATE BIT(4)
533 #define SC_OP_FULL_RESET BIT(5)
534 #define SC_OP_PREAMBLE_SHORT BIT(6)
535 #define SC_OP_PROTECT_ENABLE BIT(7)
536 #define SC_OP_RXFLUSH BIT(8)
537 #define SC_OP_LED_ASSOCIATED BIT(9)
538 #define SC_OP_RFKILL_REGISTERED BIT(10)
539 #define SC_OP_RFKILL_SW_BLOCKED BIT(11)
540 #define SC_OP_RFKILL_HW_BLOCKED BIT(12)
541 #define SC_OP_WAIT_FOR_BEACON BIT(13)
542 #define SC_OP_LED_ON BIT(14)
543 #define SC_OP_SCANNING BIT(15)
544 #define SC_OP_TSF_RESET BIT(16)
547 void (*read_cachesize)(struct ath_softc *sc, int *csz);
548 void (*cleanup)(struct ath_softc *sc);
549 bool (*eeprom_read)(struct ath_hw *ah, u32 off, u16 *data);
555 struct ieee80211_hw *hw;
558 spinlock_t wiphy_lock; /* spinlock to protect ath_wiphy data */
559 struct ath_wiphy *pri_wiphy;
560 struct ath_wiphy **sec_wiphy; /* secondary wiphys (virtual radios); may
561 * have NULL entries */
562 int num_sec_wiphy; /* number of sec_wiphy pointers in the array */
565 struct ath_wiphy *next_wiphy;
566 struct work_struct chan_work;
567 int wiphy_select_failures;
568 unsigned long wiphy_select_first_fail;
569 struct delayed_work wiphy_work;
570 unsigned long wiphy_scheduler_int;
571 int wiphy_scheduler_index;
573 struct tasklet_struct intr_tq;
574 struct tasklet_struct bcon_tasklet;
575 struct ath_hw *sc_ah;
578 spinlock_t sc_resetlock;
579 spinlock_t sc_serial_rw;
582 u8 curbssid[ETH_ALEN];
583 u8 bssidmask[ETH_ALEN];
585 u32 sc_flags; /* SC_OP_* */
594 DECLARE_BITMAP(keymap, ATH_KEYMAX);
596 atomic_t ps_usecount;
597 enum ath9k_int imask;
598 enum ath9k_ht_extprotspacing ht_extprotspacing;
599 enum ath9k_ht_macmode tx_chan_width;
601 struct ath_config config;
604 struct ath_beacon beacon;
605 struct ieee80211_rate rates[IEEE80211_NUM_BANDS][ATH_RATE_MAX];
606 struct ath_rate_table *hw_rate_table[ATH9K_MODE_MAX];
607 struct ath_rate_table *cur_rate_table;
608 struct ieee80211_supported_band sbands[IEEE80211_NUM_BANDS];
610 struct ath_led radio_led;
611 struct ath_led assoc_led;
612 struct ath_led tx_led;
613 struct ath_led rx_led;
614 struct delayed_work ath_led_blink_work;
616 int led_off_duration;
620 struct ath_rfkill rf_kill;
622 struct ath9k_node_stats nodestats;
623 #ifdef CONFIG_ATH9K_DEBUG
624 struct ath9k_debug debug;
626 struct ath_bus_ops *bus_ops;
630 struct ath_softc *sc; /* shared for all virtual wiphys */
631 struct ieee80211_hw *hw;
632 enum ath_wiphy_state {
643 int ath_reset(struct ath_softc *sc, bool retry_tx);
644 int ath_get_hal_qnum(u16 queue, struct ath_softc *sc);
645 int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc);
646 int ath_cabq_update(struct ath_softc *);
648 static inline void ath_read_cachesize(struct ath_softc *sc, int *csz)
650 sc->bus_ops->read_cachesize(sc, csz);
653 static inline void ath_bus_cleanup(struct ath_softc *sc)
655 sc->bus_ops->cleanup(sc);
658 extern struct ieee80211_ops ath9k_ops;
660 irqreturn_t ath_isr(int irq, void *dev);
661 void ath_cleanup(struct ath_softc *sc);
662 int ath_attach(u16 devid, struct ath_softc *sc);
663 void ath_detach(struct ath_softc *sc);
664 const char *ath_mac_bb_name(u32 mac_bb_version);
665 const char *ath_rf_name(u16 rf_version);
666 void ath_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw);
667 void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
668 struct ath9k_channel *ichan);
669 void ath_update_chainmask(struct ath_softc *sc, int is_ht);
670 int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
671 struct ath9k_channel *hchan);
672 void ath_radio_enable(struct ath_softc *sc);
673 void ath_radio_disable(struct ath_softc *sc);
676 int ath_pci_init(void);
677 void ath_pci_exit(void);
679 static inline int ath_pci_init(void) { return 0; };
680 static inline void ath_pci_exit(void) {};
683 #ifdef CONFIG_ATHEROS_AR71XX
684 int ath_ahb_init(void);
685 void ath_ahb_exit(void);
687 static inline int ath_ahb_init(void) { return 0; };
688 static inline void ath_ahb_exit(void) {};
691 static inline void ath9k_ps_wakeup(struct ath_softc *sc)
693 if (atomic_inc_return(&sc->ps_usecount) == 1)
694 if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE) {
695 sc->sc_ah->restore_mode = sc->sc_ah->power_mode;
696 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
700 static inline void ath9k_ps_restore(struct ath_softc *sc)
702 if (atomic_dec_and_test(&sc->ps_usecount))
703 if ((sc->hw->conf.flags & IEEE80211_CONF_PS) &&
704 !(sc->sc_flags & SC_OP_WAIT_FOR_BEACON))
705 ath9k_hw_setpower(sc->sc_ah,
706 sc->sc_ah->restore_mode);
710 void ath9k_set_bssid_mask(struct ieee80211_hw *hw);
711 int ath9k_wiphy_add(struct ath_softc *sc);
712 int ath9k_wiphy_del(struct ath_wiphy *aphy);
713 void ath9k_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb);
714 int ath9k_wiphy_pause(struct ath_wiphy *aphy);
715 int ath9k_wiphy_unpause(struct ath_wiphy *aphy);
716 int ath9k_wiphy_select(struct ath_wiphy *aphy);
717 void ath9k_wiphy_set_scheduler(struct ath_softc *sc, unsigned int msec_int);
718 void ath9k_wiphy_chan_work(struct work_struct *work);
719 bool ath9k_wiphy_started(struct ath_softc *sc);
720 void ath9k_wiphy_pause_all_forced(struct ath_softc *sc,
721 struct ath_wiphy *selected);
722 bool ath9k_wiphy_scanning(struct ath_softc *sc);
723 void ath9k_wiphy_work(struct work_struct *work);
726 * Read and write, they both share the same lock. We do this to serialize
727 * reads and writes on Atheros 802.11n PCI devices only. This is required
728 * as the FIFO on these devices can only accept sanely 2 requests. After
729 * that the device goes bananas. Serializing the reads/writes prevents this
733 static inline void ath9k_iowrite32(struct ath_hw *ah, u32 reg_offset, u32 val)
735 if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
737 spin_lock_irqsave(&ah->ah_sc->sc_serial_rw, flags);
738 iowrite32(val, ah->ah_sc->mem + reg_offset);
739 spin_unlock_irqrestore(&ah->ah_sc->sc_serial_rw, flags);
741 iowrite32(val, ah->ah_sc->mem + reg_offset);
744 static inline unsigned int ath9k_ioread32(struct ath_hw *ah, u32 reg_offset)
747 if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
749 spin_lock_irqsave(&ah->ah_sc->sc_serial_rw, flags);
750 val = ioread32(ah->ah_sc->mem + reg_offset);
751 spin_unlock_irqrestore(&ah->ah_sc->sc_serial_rw, flags);
753 val = ioread32(ah->ah_sc->mem + reg_offset);