xref: /illumos-gate/usr/src/uts/common/io/arn/arn_core.h (revision a3ccee74)
1 /*
2  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 /*
7  * Copyright (c) 2008 Atheros Communications Inc.
8  *
9  * Permission to use, copy, modify, and/or distribute this software for any
10  * purpose with or without fee is hereby granted, provided that the above
11  * copyright notice and this permission notice appear in all copies.
12  *
13  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20  */
21 
22 #ifndef _ARN_CORE_H
23 #define	_ARN_CORE_H
24 
25 #ifdef __cplusplus
26 extern "C" {
27 #endif
28 
29 #include <sys/note.h>
30 #include <sys/list.h>
31 #include <sys/net80211.h>
32 
33 #include "arn_ath9k.h"
34 #include "arn_rc.h"
35 
36 struct ath_node;
37 
38 /*
39  * Node type of wifi device
40  */
41 #ifndef DDI_NT_NET_WIFI
42 #define	DDI_NT_NET_WIFI	"ddi_network:wifi"
43 #endif
44 #define	ARN_NODENAME	"arn"
45 
46 #define	ARN_LOCK(_sc)		mutex_enter(&(_sc)->sc_genlock)
47 #define	ARN_UNLOCK(_sc)	mutex_exit(&(_sc)->sc_genlock)
48 #define	ARN_LOCK_ASSERT(_sc)	ASSERT(mutex_owned(&(_sc)->sc_genlock))
49 
50 #define	ARRAY_SIZE(x)	(sizeof (x) / sizeof (x[0]))
51 
52 #define	DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))
53 
54 #define	ARN_MIN(a, b)	((a) < (b) ? (a) : (b))
55 #define	ARN_MAX(a, b)	((a) > (b) ? (a) : (b))
56 
57 #define	abs(x)		((x) >= 0 ? (x) : -(x))
58 
59 enum ath9k_key_len {
60 	ATH9K_LEN_WEP40 = 5,
61 	ATH9K_LEN_WEP104 = 13,
62 };
63 
64 /*
65  * Sync a DMA area described by a dma_area_t
66  */
67 #define	ARN_DMA_SYNC(area, flag)    ((void) ddi_dma_sync((area).dma_hdl,    \
68 				(area).offset, (area).alength, (flag)))
69 
70 #define	list_empty(a) ((a)->list_head.list_next == &(a)->list_head)
71 #define	list_d2l(a, obj) ((list_node_t *)(((char *)obj) + (a)->list_offset))
72 #define	list_object(a, node) ((void *)(((char *)node) - (a)->list_offset))
73 #define	list_entry(ptr, type, member)	\
74 	((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
75 #define	list_is_last(node, list)	\
76 	((node)->list_next == &(list)->list_head)
77 
78 #define	list_for_each_entry_safe(object, temp, list_t)	\
79 	for (object = list_head(list_t),	\
80 	temp = list_object((list_t), ((list_d2l(list_t, object))->list_next));\
81 	((list_d2l(list_t, temp))->list_next) != &((list_t)->list_head);\
82 	object = temp,	\
83 	temp = list_object((list_t), (list_d2l(list_t, temp))->list_next))
84 
85 /*
86  *  Insert src list after dst list. reinitialize src list thereafter.
87  */
88 static __inline__ void
89 /* LINTED E_STATIC_UNUSED */
list_splice_tail_init(list_t * dst,list_t * src)90 list_splice_tail_init(list_t *dst, list_t *src)
91 {
92 	list_node_t *dstnode = &dst->list_head;
93 	list_node_t *srcnode = &src->list_head;
94 
95 	ASSERT(dst->list_size == src->list_size);
96 	ASSERT(dst->list_offset == src->list_offset);
97 
98 	if (list_empty(src))
99 		return;
100 
101 	dstnode->list_prev->list_next = srcnode->list_next;
102 	srcnode->list_next->list_prev = dstnode->list_prev;
103 	dstnode->list_prev = srcnode->list_prev;
104 	srcnode->list_prev->list_next = dstnode;
105 
106 	/* reinitialize src list */
107 	srcnode->list_next = srcnode->list_prev = srcnode;
108 }
109 
110 #define	ARN_LE_READ_16(p)						\
111 	((uint16_t)							\
112 	((((uint8_t *)(p))[0]) | (((uint8_t *)(p))[1] <<  8)))
113 
114 #define	ARN_LE_READ_32(p)						\
115 	((uint32_t)							\
116 	((((uint8_t *)(p))[0]) | (((uint8_t *)(p))[1] <<  8) |		\
117 	(((uint8_t *)(p))[2] << 16) | (((uint8_t *)(p))[3] << 24)))
118 
119 #define	swab16(value)  \
120 	((((value) & 0xff) << 8) | ((value) >> 8))
121 
122 #define	swab32(value)	\
123 	(((uint32_t)swab16((uint16_t)((value) & 0xffff)) << 16) | \
124 	(uint32_t)swab16((uint16_t)((value) >> 16)))
125 
126 #define	swab64(value)	\
127 	(((uint64_t)swab32((uint32_t)((value) & 0xffffffff)) \
128 	    << 32) | \
129 	(uint64_t)swab32((uint32_t)((value) >> 32)))
130 
131 /* Bit map related macros. */
132 #define	set_bit(i, a)		((a)[(i)/NBBY] |= (1 << ((i)%NBBY)))
133 #define	clr_bit(i, a)		((a)[(i)/NBBY] &= ~(1 << ((i)%NBBY)))
134 #define	is_set(i, a)		((a)[(i)/NBBY] & (1 << ((i)%NBBY)))
135 #define	is_clr(i, a)		(!((a)[(i)/NBBY] & (1 << ((i)%NBBY))))
136 
137 /* Macro to expand scalars to 64-bit objects */
138 
139 #define	ito64(x) (sizeof (x) == 8) ?			\
140 	(((unsigned long long int)(x)) & (0xff)) :	\
141 	(sizeof (x) == 16) ?				\
142 	(((unsigned long long int)(x)) & 0xffff) :	\
143 	((sizeof (x) == 32) ?				\
144 	(((unsigned long long int)(x)) & 0xffffffff) :	\
145 	(unsigned long long int)(x))
146 
147 /* increment with wrap-around */
148 #define	INCR(_l, _sz)	do {			\
149 		(_l)++;				\
150 		(_l) &= ((_sz) - 1);		\
151 	} while (0)
152 
153 /* decrement with wrap-around */
154 #define	DECR(_l, _sz)  do {			\
155 		(_l)--;				\
156 		(_l) &= ((_sz) - 1);		\
157 	} while (0)
158 
159 #define	A_MAX(a, b)	((a) > (b) ? (a) : (b))
160 
161 #define	TSF_TO_TU(_h, _l)	\
162 	((((uint32_t)(_h)) << 22) | (((uint32_t)(_l)) >> 10))
163 
164 #define	ARN_TXQ_SETUP(sc, i)	((sc)->sc_txqsetup & (1<<i))
165 
166 #define	IEEE80211_IS_CHAN_HTA(_c) \
167 	(IEEE80211_IS_CHAN_5GHZ(_c) && \
168 	((_c)->ich_flags & IEEE80211_CHAN_HT))
169 
170 #define	IEEE80211_IS_CHAN_HTG(_c) \
171 	(IEEE80211_IS_CHAN_2GHZ(_c) && \
172 	((_c)->ich_flags & IEEE80211_CHAN_HT))
173 
174 #define	IEEE80211_IS_DATA(_wh) \
175 	(((_wh)->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == \
176 	IEEE80211_FC0_TYPE_DATA)
177 
178 #define	IEEE80211_IS_DATA_QOS(_wh) \
179 	(((_wh)->i_fc[0] & (IEEE80211_FC0_TYPE_MASK | \
180 	IEEE80211_FC0_SUBTYPE_QOS)) == \
181 	(IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS))
182 
183 #define	IEEE80211_IS_MGMT(_wh) \
184 	(((_wh)->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == \
185 	IEEE80211_FC0_TYPE_MGT)
186 
187 #define	IEEE80211_IS_CTL(_wh) \
188 	(((_wh)->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == \
189 	IEEE80211_FC0_TYPE_CTL)
190 
191 #define	IEEE80211_IS_PSPOLL(_wh) \
192 	(((_wh)->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == \
193 	IEEE80211_FC0_SUBTYPE_PS_POLL)
194 
195 #define	IEEE80211_IS_BACK_REQ(_wh) \
196 	(((_wh)->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == \
197 	IEEE80211_FC0_SUBTYPE_BAR)
198 
199 #define	IEEE80211_HAS_MOREFRAGS(_wh) \
200 	(((_wh)->i_fc[1] & IEEE80211_FC1_MORE_FRAG) == \
201 	IEEE80211_FC1_MORE_FRAG)
202 
203 /* Debugging */
204 enum ARN_DEBUG {
205 	ARN_DBG_HW		= 0x00000001,
206 	ARN_DBG_REG_IO		= 0x00000002,
207 	ARN_DBG_QUEUE		= 0x00000004,
208 	ARN_DBG_EEPROM		= 0x00000008,
209 	ARN_DBG_XMIT		= 0x00000010,
210 	ARN_DBG_RECV		= 0x00000020,
211 	ARN_DBG_CALIBRATE	= 0x00000040,
212 	ARN_DBG_CHANNEL		= 0x00000080,
213 	ARN_DBG_INTERRUPT	= 0x00000100,
214 	ARN_DBG_REGULATORY	= 0x00000200,
215 	ARN_DBG_ANI		= 0x00000400,
216 	ARN_DBG_POWER_MGMT	= 0x00000800,
217 	ARN_DBG_KEYCACHE	= 0x00001000,
218 	ARN_DBG_BEACON		= 0x00002000,
219 	ARN_DBG_RATE		= 0x00004000,
220 	ARN_DBG_INIT		= 0x00008000,
221 	ARN_DBG_ATTACH		= 0x00010000,
222 	ARN_DBG_DEATCH		= 0x00020000,
223 	ARN_DBG_AGGR		= 0x00040000,
224 	ARN_DBG_RESET		= 0x00080000,
225 	ARN_DBG_FATAL		= 0x00100000,
226 	ARN_DBG_ANY		= 0x00200000,
227 	ARN_DBG_ALL		= 0x00FFFFFF,
228 };
229 
230 /* Debug and log functions */
231 void arn_dbg(uint32_t dbg_flags, const int8_t *fmt, ...); /* debug function */
232 void arn_log(const int8_t *fmt, ...); /* event log function */
233 void arn_problem(const int8_t *fmt, ...); /* run-time problem function */
234 
235 #ifdef DEBUG
236 #define	ARN_DDB(command)	do {				\
237 					{ command; }		\
238 					_NOTE(CONSTANTCONDITION)\
239 				} while (0)
240 #else
241 #define	ARN_DDB(command)
242 #endif /* DEBUG */
243 
244 #define	ARN_DBG(args)		ARN_DDB(arn_dbg args)
245 
246 struct ath_stats {
247 	uint32_t	ast_hardware;	/* fatal hardware error interrupts */
248 	uint32_t	ast_rxorn;	/* rx overrun interrupts */
249 	uint32_t	ast_rxeol;	/* rx eol interrupts */
250 	uint32_t	ast_txurn;	/* tx underrun interrupts */
251 	uint32_t	ast_tx_mgmt;	/* management frames transmitted */
252 	uint32_t	ast_tx_discard;	/* frames discarded prior to assoc */
253 	uint32_t	ast_tx_invalid; /* frames discarded 'cuz device gone */
254 	uint32_t	ast_tx_qstop;	/* tx queue stopped 'cuz full */
255 	uint32_t	ast_tx_nobuf;	/* tx failed 'cuz no tx buffer (data) */
256 	uint32_t	ast_tx_nobufmgt; /* tx failed 'cuz no tx buffer(mgmt) */
257 	uint32_t	ast_tx_xretries; /* tx failed 'cuz too many retries */
258 	uint32_t	ast_tx_fifoerr;	/* tx failed 'cuz FIFO underrun */
259 	uint32_t	ast_tx_filtered; /* tx failed 'cuz xmit filtered */
260 	uint32_t	ast_tx_shortretry; /* tx on-chip retries (short) */
261 	uint32_t	ast_tx_longretry; /* tx on-chip retries (long) */
262 	uint32_t	ast_tx_noack;	/* tx frames with no ack marked */
263 	uint32_t	ast_tx_rts;	/* tx frames with rts enabled */
264 	uint32_t	ast_tx_shortpre; /* tx frames with short preamble */
265 	uint32_t	ast_tx_altrate;	/* tx frames with alternate rate */
266 	uint32_t	ast_tx_protect;	/* tx frames with protection */
267 	int16_t		ast_tx_rssi;	/* tx rssi of last ack */
268 	int16_t		ast_tx_rssidelta; /* tx rssi delta */
269 	uint32_t	ast_rx_crcerr;	/* rx failed 'cuz of bad CRC */
270 	uint32_t	ast_rx_fifoerr;	/* rx failed 'cuz of FIFO overrun */
271 	uint32_t	ast_rx_badcrypt; /* rx failed 'cuz decryption */
272 	uint32_t	ast_rx_phyerr;	/* rx PHY error summary count */
273 	uint32_t	ast_rx_phy[32];	/* rx PHY error per-code counts */
274 	uint32_t	ast_rx_tooshort; /* rx discarded 'cuz frame too short */
275 	uint32_t	ast_per_cal;	/* periodic calibration calls */
276 	uint32_t	ast_per_calfail; /* periodic calibration failed */
277 	uint32_t	ast_per_rfgain;	/* periodic calibration rfgain reset */
278 	uint32_t	ast_rate_calls;	/* rate control checks */
279 	uint32_t	ast_rate_raise;	/* rate control raised xmit rate */
280 	uint32_t	ast_rate_drop;	/* rate control dropped xmit rate */
281 };
282 
283 struct dma_area {
284 	ddi_acc_handle_t	acc_hdl;	/* handle for memory */
285 	caddr_t			mem_va;		/* CPU VA of memory */
286 	uint32_t		nslots;		/* number of slots */
287 	uint32_t		size;		/* size per slot */
288 	size_t			alength;	/* allocated size */
289 						/* >= product of above */
290 
291 	ddi_dma_handle_t	dma_hdl;	/* DMA handle */
292 	offset_t		offset;		/* relative to handle */
293 	ddi_dma_cookie_t	cookie;		/* associated cookie */
294 	uint32_t		ncookies;	/* must be 1 */
295 	uint32_t		token;		/* arbitrary identifier */
296 };
297 typedef struct dma_area dma_area_t;
298 
299 /* Load-time Configuration */
300 
301 /*
302  * Per-instance load-time (note: NOT run-time)
303  * configurations for Atheros Device
304  */
305 struct ath_config {
306 	uint32_t ath_aggr_prot;
307 	uint16_t txpowlimit;
308 	uint16_t txpowlimit_override;
309 	uint8_t cabqReadytime; /* Cabq Readytime % */
310 	uint8_t swBeaconProcess; /* Process received beacons in SW (vs HW) */
311 };
312 
313 /* Descriptor Management */
314 
315 #define	ATH_TXBUF_RESET(_bf) do {		\
316 		(_bf)->bf_status = 0;		\
317 		(_bf)->bf_lastbf = NULL;	\
318 		(_bf)->bf_lastfrm = NULL;	\
319 		(_bf)->bf_next = NULL;		\
320 		(void) memset(&((_bf)->bf_state), 0,	\
321 		sizeof (struct ath_buf_state));	\
322 		(void) memset(&((_bf)->tx_info_priv), 0,	\
323 		sizeof (struct ath_tx_info_priv));	\
324 		_NOTE(CONSTCOND) \
325 	} while (0)
326 
327 enum buffer_type {
328 	BUF_DATA		= BIT(0),
329 	BUF_AGGR		= BIT(1),
330 	BUF_AMPDU		= BIT(2),
331 	BUF_HT			= BIT(3),
332 	BUF_RETRY		= BIT(4),
333 	BUF_XRETRY		= BIT(5),
334 	BUF_SHORT_PREAMBLE	= BIT(6),
335 	BUF_BAR			= BIT(7),
336 	BUF_PSPOLL		= BIT(8),
337 	BUF_AGGR_BURST		= BIT(9),
338 	BUF_CALC_AIRTIME	= BIT(10),
339 };
340 
341 struct ath_buf_state {
342 	int bfs_nframes;	/* # frames in aggregate */
343 	uint16_t bfs_al;	/* length of aggregate */
344 	uint16_t bfs_frmlen;	/* length of frame */
345 	int bfs_seqno;		/* sequence number */
346 	int bfs_tidno;		/* tid of this frame */
347 	int bfs_retries;	/* current retries */
348 	uint32_t bf_type;	/* BUF_* (enum buffer_type) */
349 	/* key type used to encrypt this frame */
350 	uint32_t bfs_keyix;
351 	enum ath9k_key_type bfs_keytype;
352 };
353 
354 #define	bf_nframes		bf_state.bfs_nframes
355 #define	bf_al			bf_state.bfs_al
356 #define	bf_frmlen		bf_state.bfs_frmlen
357 #define	bf_retries		bf_state.bfs_retries
358 #define	bf_seqno		bf_state.bfs_seqno
359 #define	bf_tidno		bf_state.bfs_tidno
360 #define	bf_rcs			bf_state.bfs_rcs
361 #define	bf_keyix		bf_state.bfs_keyix
362 #define	bf_keytype		bf_state.bfs_keytype
363 #define	bf_isdata(bf)		(bf->bf_state.bf_type & BUF_DATA)
364 #define	bf_isaggr(bf)		(bf->bf_state.bf_type & BUF_AGGR)
365 #define	bf_isampdu(bf)		(bf->bf_state.bf_type & BUF_AMPDU)
366 #define	bf_isht(bf)		(bf->bf_state.bf_type & BUF_HT)
367 #define	bf_isretried(bf)	(bf->bf_state.bf_type & BUF_RETRY)
368 #define	bf_isxretried(bf)	(bf->bf_state.bf_type & BUF_XRETRY)
369 #define	bf_isshpreamble(bf)	(bf->bf_state.bf_type & BUF_SHORT_PREAMBLE)
370 #define	bf_isbar(bf)		(bf->bf_state.bf_type & BUF_BAR)
371 #define	bf_ispspoll(bf)		(bf->bf_state.bf_type & BUF_PSPOLL)
372 #define	bf_isaggrburst(bf)	(bf->bf_state.bf_type & BUF_AGGR_BURST)
373 
374 /*
375  * Abstraction of a contiguous buffer to transmit/receive.
376  * There is only a single hw descriptor encapsulated here.
377  */
378 struct ath_buf {
379 	/* last buf of this unit (a frame or an aggregate) */
380 	struct ath_buf *bf_lastbf;
381 	struct ath_buf *bf_lastfrm;	/* last buf of this frame */
382 	struct ath_buf *bf_next;	/* next subframe in the aggregate */
383 	mblk_t *bf_m;
384 	struct ath_desc	*bf_desc;	/* virtual addr of desc */
385 	uint32_t bf_daddr;		/* physical addr of desc */
386 	dma_area_t bf_dma;		/* dma area for buf */
387 	struct ieee80211_node *bf_in;	/* pointer to the node */
388 	uint32_t bf_status;
389 	uint16_t bf_flags;		/* tx descriptor flags */
390 	struct ath_buf_state bf_state;	/* buffer state */
391 
392 	/* Temp workground for rc */
393 	struct ath9k_tx_rate rates[4];
394 	struct ath_tx_info_priv tx_info_priv;
395 
396 	/* we're in list of sc->sc_txbuf_list or sc->sc_rxbuf_list */
397 	list_node_t bf_node;
398 };
399 
400 /*
401  * reset the rx buffer.
402  * any new fields added to the athbuf and require
403  * reset need to be added to this macro.
404  * currently bf_status is the only one requires that
405  * requires reset.
406  */
407 #define	ATH_RXBUF_RESET(_bf)	((_bf)->bf_status = 0)
408 
409 /* hw processing complete, desc processed by hal */
410 #define	ATH_BUFSTATUS_DONE	0x00000001
411 /* hw processing complete, desc hold for hw */
412 #define	ATH_BUFSTATUS_STALE	0x00000002
413 /* Rx-only: OS is done with this packet and it's ok to queued it to hw */
414 #define	ATH_BUFSTATUS_FREE	0x00000004
415 
416 /* RX / TX */
417 
418 #define	ATH_MAX_ANTENNA	3
419 #define	ATH_RXBUF	512
420 #define	WME_NUM_TID	16
421 
422 void arn_rx_buf_link(struct arn_softc *sc, struct ath_buf *bf);
423 int arn_startrecv(struct arn_softc *sc);
424 boolean_t arn_stoprecv(struct arn_softc *sc);
425 void arn_flushrecv(struct arn_softc *sc);
426 uint32_t arn_calcrxfilter(struct arn_softc *sc);
427 int arn_rx_init(struct arn_softc *sc, int nbufs);
428 void arn_rx_cleanup(struct arn_softc *sc);
429 uint_t arn_softint_handler(caddr_t data);
430 void arn_setdefantenna(struct arn_softc *sc, uint32_t antenna);
431 
432 #define	ATH_TXBUF	512
433 /* max number of transmit attempts (tries) */
434 #define	ATH_TXMAXTRY	13
435 /* max number of 11n transmit attempts (tries) */
436 #define	ATH_11N_TXMAXTRY	10
437 /* max number of tries for management and control frames */
438 #define	ATH_MGT_TXMAXTRY	4
439 #define	WME_BA_BMP_SIZE		64
440 #define	WME_MAX_BA		WME_BA_BMP_SIZE
441 #define	ATH_TID_MAX_BUFS	(2 * WME_MAX_BA)
442 
443 /* Wireless Multimedia Extension Defines */
444 #define	WME_AC_BE	0 /* best effort */
445 #define	WME_AC_BK	1 /* background */
446 #define	WME_AC_VI	2 /* video */
447 #define	WME_AC_VO	3 /* voice */
448 #define	WME_NUM_AC	4
449 
450 /*
451  * Data transmit queue state.  One of these exists for each
452  * hardware transmit queue.  Packets sent to us from above
453  * are assigned to queues based on their priority.  Not all
454  * devices support a complete set of hardware transmit queues.
455  * For those devices the array sc_ac2q will map multiple
456  * priorities to fewer hardware queues (typically all to one
457  * hardware queue).
458  */
459 
460 struct ath_txq {
461 	uint32_t	axq_qnum; /* hardware q number */
462 	uint32_t	*axq_link; /* link ptr in last TX desc */
463 	list_t		axq_list; /* transmit queue */
464 	kmutex_t	axq_lock; /* lock on q and link */
465 	unsigned long	axq_lockflags; /* intr state when must cli */
466 	uint32_t		axq_depth; /* queue depth (stat only) */
467 	uint8_t 	axq_aggr_depth; /* aggregates queued */
468 	uint32_t 	axq_totalqueued; /* total ever queued */
469 	boolean_t	stopped;
470 	struct ath_buf	*axq_linkbuf; /* virtual addr of last buffer */
471 	/* first desc of the last descriptor that contains CTS */
472 	struct ath_desc *axq_lastdsWithCTS;
473 
474 	/*
475 	 * final desc of the gating desc that determines whether
476 	 * lastdsWithCTS has been DMA'ed or not
477 	 */
478 	struct ath_desc *axq_gatingds;
479 
480 	list_t axq_acq;
481 
482 	uint32_t	axq_intrcnt; /* interrupt count */
483 };
484 
485 
486 #define	AGGR_CLEANUP		BIT(1)
487 #define	AGGR_ADDBA_COMPLETE	BIT(2)
488 #define	AGGR_ADDBA_PROGRESS	BIT(3)
489 
490 /* per TID aggregate tx state for a destination */
491 struct ath_atx_tid {
492 	list_node_t list;
493 	list_t buf_q;
494 	struct ath_node *an;
495 	struct ath_atx_ac *ac;
496 	struct ath_buf *tx_buf[ATH_TID_MAX_BUFS]; /* active tx frames */
497 	uint16_t seq_start;
498 	uint16_t seq_next;
499 	uint16_t baw_size;
500 	int tidno;
501 	int baw_head; /* first un-acked tx buffer */
502 	int baw_tail; /* next unused tx buffer slot */
503 	int sched;
504 	int paused;
505 	uint8_t state;
506 	int addba_exchangeattempts;
507 };
508 
509 /* per access-category aggregate tx state for a destination */
510 struct ath_atx_ac {
511 	int sched; /* dest-ac is scheduled */
512 	int qnum; /* H/W queue number associated with this AC */
513 	list_node_t		list;
514 	list_t		tid_q;
515 };
516 
517 /* per dest tx state */
518 struct ath_atx {
519 	struct ath_atx_tid tid[WME_NUM_TID];
520 	struct ath_atx_ac ac[WME_NUM_AC];
521 };
522 
523 /* per-frame tx control block */
524 struct ath_tx_control {
525 	struct ath_txq *txq;
526 	int if_id;
527 };
528 
529 /* per frame tx status block */
530 struct ath_xmit_status {
531 	/* number of retries to successufully transmit this frame */
532 	int retries;
533 	int flags; /* status of transmit */
534 #define	ATH_TX_ERROR	0x01
535 #define	ATH_TX_XRETRY	0x02
536 #define	ATH_TX_BAR	0x04
537 };
538 
539 struct ath_tx_stat {
540 	int rssi; /* RSSI (noise floor ajusted) */
541 	int rssictl[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */
542 	int rssiextn[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */
543 	int rateieee; /* data rate xmitted (IEEE rate code) */
544 	int rateKbps; /* data rate xmitted (Kbps) */
545 	int ratecode; /* phy rate code */
546 	int flags; /* validity flags */
547 /* if any of ctl,extn chain rssis are valid */
548 #define	ATH_TX_CHAIN_RSSI_VALID	0x01
549 /* if extn chain rssis are valid */
550 #define	ATH_TX_RSSI_EXTN_VALID	0x02
551 	uint32_t airtime; /* time on air per final tx rate */
552 };
553 
554 void arn_tx_node_init(struct arn_softc *sc, struct ath_node *an);
555 void arn_tx_node_cleanup(struct arn_softc *sc, struct ieee80211_node *in);
556 struct ath_txq *arn_txq_setup(struct arn_softc *sc, int qtype, int subtype);
557 void arn_tx_cleanupq(struct arn_softc *sc, struct ath_txq *txq);
558 int arn_tx_setup(struct arn_softc *sc, int haltype);
559 void arn_draintxq(struct arn_softc *sc, boolean_t retry_tx);
560 void arn_tx_draintxq(struct arn_softc *sc, struct ath_txq *txq);
561 void arn_txq_schedule(struct arn_softc *sc, struct ath_txq *txq);
562 int arn_tx(ieee80211com_t *ic, mblk_t *mp, uint8_t type);
563 int arn_txq_update(struct arn_softc *sc, int qnum,
564     struct ath9k_tx_queue_info *qinfo);
565 void arn_tx_int_proc(void *arg);
566 
567 /* Node / Aggregation */
568 
569 #define	ADDBA_EXCHANGE_ATTEMPTS	10
570 #define	ATH_AGGR_DELIM_SZ	4 /* delimiter size   */
571 #define	ATH_AGGR_MINPLEN	256 /* in bytes, minimum packet length */
572 /* number of delimiters for encryption padding */
573 #define	ATH_AGGR_ENCRYPTDELIM	10
574 /* minimum h/w qdepth to be sustained to maximize aggregation */
575 #define	ATH_AGGR_MIN_QDEPTH			2
576 #define	ATH_AMPDU_SUBFRAME_DEFAULT		32
577 #define	IEEE80211_SEQ_SEQ_SHIFT			4
578 #define	IEEE80211_SEQ_MAX			4096
579 #define	IEEE80211_MIN_AMPDU_BUF			0x8
580 #define	IEEE80211_HTCAP_MAXRXAMPDU_FACTOR	13
581 
582 /*
583  * return whether a bit at index _n in bitmap _bm is set
584  * _sz is the size of the bitmap
585  */
586 #define	ATH_BA_ISSET(_bm, _n)	(((_n) < (WME_BA_BMP_SIZE)) &&	\
587 	((_bm)[(_n) >> 5] & (1 << ((_n) & 31))))
588 
589 /* return block-ack bitmap index given sequence and starting sequence */
590 #define	ATH_BA_INDEX(_st, _seq)	(((_seq) - (_st)) & (IEEE80211_SEQ_MAX - 1))
591 
592 /* returns delimiter padding required given the packet length */
593 #define	ATH_AGGR_GET_NDELIM(_len)	\
594 	(((((_len) + ATH_AGGR_DELIM_SZ) < ATH_AGGR_MINPLEN) ?	\
595 	(ATH_AGGR_MINPLEN - (_len) - ATH_AGGR_DELIM_SZ) : 0) >> 2)
596 
597 #define	BAW_WITHIN(_start, _bawsz, _seqno)	\
598 	((((_seqno) - (_start)) & 4095) < (_bawsz))
599 
600 #define	ATH_DS_BA_SEQ(_ds)		((_ds)->ds_us.tx.ts_seqnum)
601 #define	ATH_DS_BA_BITMAP(_ds)		(&(_ds)->ds_us.tx.ba_low)
602 #define	ATH_DS_TX_BA(_ds)		((_ds)->ds_us.tx.ts_flags & ATH9K_TX_BA)
603 #define	ATH_AN_2_TID(_an, _tidno)	(&(_an)->tid[(_tidno)])
604 
605 #define	ATH_TX_ERROR	0x01
606 #define	ATH_TX_XRETRY	0x02
607 #define	ATH_TX_BAR	0x04
608 
609 enum ATH_AGGR_STATUS {
610 	ATH_AGGR_DONE,
611 	ATH_AGGR_BAW_CLOSED,
612 	ATH_AGGR_LIMITED,
613 };
614 
615 struct aggr_rifs_param {
616 	int param_max_frames;
617 	int param_max_len;
618 	int param_rl;
619 	int param_al;
620 	struct ath_rc_series *param_rcs;
621 };
622 
623 /* RSSI correction */
624 void ath9k_init_nfcal_hist_buffer(struct ath_hal *ah);
625 
626 #define	AR_PHY_CCA_MAX_AR5416_GOOD_VALUE	-85
627 #define	AR_PHY_CCA_MAX_AR9280_GOOD_VALUE	-112
628 #define	AR_PHY_CCA_MAX_AR9285_GOOD_VALUE	-118
629 
630 #define	ATH_RSSI_LPF_LEN		10
631 #define	RSSI_LPF_THRESHOLD		-20
632 #define	ATH9K_RSSI_BAD			-128
633 #define	ATH_RSSI_EP_MULTIPLIER		(1<<7)
634 #define	ATH_EP_MUL(x, mul)		((x) * (mul))
635 #define	ATH_RSSI_IN(x)		(ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
636 #define	ATH_LPF_RSSI(x, y, len)	\
637 	((x != ATH_RSSI_DUMMY_MARKER) ? \
638 	(((x) * ((len) - 1) + (y)) / (len)) : (y))
639 #define	ATH_RSSI_LPF(x, y)	do { \
640     if ((y) >= RSSI_LPF_THRESHOLD)   \
641 	x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN);  \
642 } while (0)
643 #define	ATH_EP_RND(x, mul)	\
644 	((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
645 
646 /* driver-specific node state */
647 struct ath_node {
648 	struct ieee80211_node an_node;	/* base class */
649 	uint32_t	an_tx_times;	/* rate ctl times on one rate */
650 	uint32_t	an_tx_ok;	/* tx ok pkt */
651 	uint32_t	an_tx_err;	/* tx !ok pkt */
652 	uint32_t	an_tx_retr;	/* tx retry count */
653 	int32_t		an_tx_upper;	/* tx upper rate req cnt */
654 	uint32_t	an_tx_antenna;	/* antenna for last good frame */
655 	uint8_t		an_tx_rix0;	/* series 0 rate index */
656 	uint8_t		an_tx_try0;	/* series 0 try count */
657 	uint8_t		an_tx_mgtrate;	/* h/w rate for management/ctl frames */
658 	uint8_t		an_tx_mgtratesp; /* short preamble h/w rate for " " */
659 	uint8_t		an_tx_rate0;	/* series 0 h/w rate */
660 	uint8_t		an_tx_rate1;	/* series 1 h/w rate */
661 	uint8_t		an_tx_rate2;	/* series 2 h/w rate */
662 	uint8_t		an_tx_rate3;	/* series 3 h/w rate */
663 	uint8_t		an_tx_rate0sp;	/* series 0 short preamble h/w rate */
664 	uint8_t		an_tx_rate1sp;	/* series 1 short preamble h/w rate */
665 	uint8_t		an_tx_rate2sp;	/* series 2 short preamble h/w rate */
666 	uint8_t		an_tx_rate3sp;	/* series 3 short preamble h/w rate */
667 	struct ath_rate_priv rate_priv;
668 	struct ath_atx_tid tid[WME_NUM_TID];
669 	struct ath_atx_ac ac[WME_NUM_AC];
670 	uint16_t maxampdu;
671 	uint8_t mpdudensity;
672 	int	last_rssi;
673 };
674 #define	ATH_NODE(_n)	((struct ath_node *)(_n))
675 
676 /*
677  * Define the scheme that we select MAC address for multiple
678  * BSS on the same radio. The very first VAP will just use the MAC
679  * address from the EEPROM. For the next 3 VAPs, we set the
680  * U/L bit (bit 1) in MAC address, and use the next two bits as the
681  * index of the VAP.
682  */
683 
684 #define	ATH_SET_VAP_BSSID_MASK(bssid_mask) \
685 	((bssid_mask)[0] &= ~(((ATH_BCBUF-1)<<2)|0x02))
686 
687 
688 /* driver-specific vap state */
689 struct ath_vap {
690 	int av_bslot; /* beacon slot index */
691 	enum ath9k_opmode av_opmode; /* VAP operational mode */
692 	struct ath_buf *av_bcbuf; /* beacon buffer */
693 	struct ath_tx_control av_btxctl; /* txctl information for beacon */
694 };
695 
696 /* Beacon Handling */
697 
698 /*
699  * Regardless of the number of beacons we stagger, (i.e. regardless of the
700  * number of BSSIDs) if a given beacon does not go out even after waiting this
701  * number of beacon intervals, the game's up.
702  */
703 #define	BSTUCK_THRESH		(9 * ATH_BCBUF)
704 #define	ATH_BCBUF		4 /* number of beacon buffers */
705 #define	ATH_DEFAULT_BINTVAL	100 /* default beacon interval in TU */
706 #define	ATH_DEFAULT_BMISS_LIMIT	10
707 #define	IEEE80211_MS_TO_TU(x)	(((x) * 1000) / 1024)
708 
709 /* beacon configuration */
710 struct ath_beacon_config {
711 	uint16_t beacon_interval;
712 	uint16_t listen_interval;
713 	uint16_t dtim_period;
714 	uint16_t bmiss_timeout;
715 	uint8_t dtim_count;
716 	uint8_t tim_offset;
717 	union {
718 		uint64_t last_tsf;
719 		uint8_t last_tstamp[8];
720 	} u; /* last received beacon/probe response timestamp of this BSS. */
721 };
722 
723 uint32_t arn_beaconq_setup(struct ath_hal *ah);
724 int arn_beacon_alloc(struct arn_softc *sc, struct ieee80211_node *in);
725 void arn_beacon_config(struct arn_softc *sc);
726 void arn_beacon_return(struct arn_softc *sc);
727 void arn_beacon_sync(struct arn_softc *sc);
728 void arn_bmiss_proc(void *arg);
729 
730 void arn_recv_mgmt(struct ieee80211com *ic, mblk_t *mp,
731 	struct ieee80211_node *in, int subtype, int rssi, uint32_t rstamp);
732 
733 /* ANI */
734 
735 /*
736  * ANI values for STA only.
737  * FIXME: Add appropriate values for AP later
738  */
739 
740 #define	ATH_ANI_POLLINTERVAL	100	/* 100 milliseconds between ANI poll */
741 #define	ATH_SHORT_CALINTERVAL	1000	/* 1 second between calibrations */
742 #define	ATH_LONG_CALINTERVAL	30000	/* 30 seconds between calibrations */
743 #define	ATH_RESTART_CALINTERVAL	1200000	/* 20 minutes between calibrations */
744 
745 struct ath_ani {
746 	boolean_t sc_caldone;
747 	int16_t sc_noise_floor;
748 	unsigned int sc_longcal_timer;
749 	unsigned int sc_shortcal_timer;
750 	unsigned int sc_resetcal_timer;
751 	unsigned int sc_checkani_timer;
752 };
753 
754 /* LED Control */
755 #define	ATH_LED_PIN	1
756 
757 enum ath_led_type {
758 	ATH_LED_RADIO,
759 	ATH_LED_ASSOC,
760 	ATH_LED_TX,
761 	ATH_LED_RX
762 };
763 
764 struct ath_led {
765 	struct arn_softc *sc;
766 	enum ath_led_type led_type;
767 	char name[32];
768 	boolean_t registered;
769 };
770 
771 /* Rfkill */
772 #define	ATH_RFKILL_POLL_INTERVAL	2000 /* msecs */
773 
774 /* Main driver core */
775 /*
776  * Default cache line size, in bytes.
777  * Used when PCI device not fully initialized by bootrom/BIOS
778  */
779 #define	DEFAULT_CACHELINE	32
780 #define	ATH_DEFAULT_NOISE_FLOOR	-95
781 #define	ATH_REGCLASSIDS_MAX	10
782 #define	ATH_CABQ_READY_TIME	80 /* % of beacon interval */
783 #define	ATH_MAX_SW_RETRIES	10
784 #define	ATH_CHAN_MAX		255
785 #define	IEEE80211_WEP_NKID	4 /* number of key ids */
786 #define	IEEE80211_RATE_VAL	0x7f
787 /*
788  * The key cache is used for h/w cipher state and also for
789  * tracking station state such as the current tx antenna.
790  * We also setup a mapping table between key cache slot indices
791  * and station state to short-circuit node lookups on rx.
792  * Different parts have different size key caches.  We handle
793  * up to ATH_KEYMAX entries (could dynamically allocate state).
794  */
795 #define	ATH_KEYMAX		128 /* max key cache size we handle */
796 
797 #define	ATH_IF_ID_ANY		0xff
798 #define	ATH_TXPOWER_MAX		100 /* .5 dBm units */
799 #define	ATH_RSSI_DUMMY_MARKER	0x127
800 #define	ATH_RATE_DUMMY_MARKER	0
801 
802 enum PROT_MODE {
803 	PROT_M_NONE = 0,
804 	PROT_M_RTSCTS,
805 	PROT_M_CTSONLY
806 };
807 
808 #define	SC_OP_INVALID		BIT(0)
809 #define	SC_OP_BEACONS		BIT(1)
810 #define	SC_OP_RXAGGR		BIT(2)
811 #define	SC_OP_TXAGGR		BIT(3)
812 #define	SC_OP_CHAINMASK_UPDATE	BIT(4)
813 #define	SC_OP_FULL_RESET	BIT(5)
814 #define	SC_OP_NO_RESET		BIT(6)
815 #define	SC_OP_PREAMBLE_SHORT	BIT(7)
816 #define	SC_OP_PROTECT_ENABLE	BIT(8)
817 #define	SC_OP_RXFLUSH		BIT(9)
818 #define	SC_OP_LED_ASSOCIATED	BIT(10)
819 #define	SC_OP_RFKILL_REGISTERED	BIT(11)
820 #define	SC_OP_RFKILL_SW_BLOCKED	BIT(12)
821 #define	SC_OP_RFKILL_HW_BLOCKED	BIT(13)
822 
823 /* HT  */
824 typedef	struct ht_conf {
825 	boolean_t		ht_supported;
826 	uint16_t		cap;
827 	uint8_t			ampdu_factor;
828 	uint8_t			ampdu_density;
829 	uint8_t			rx_mcs_mask[10];
830 } arn_ht_conf;
831 
832 uint8_t parse_mpdudensity(uint8_t mpdudensity);
833 
834 void arn_ampdu_recv_action(struct ieee80211_node *in,
835     const uint8_t *frm, const uint8_t *efrm);
836 int arn_ampdu_send_action(struct ieee80211_node *in,
837     int category, int action, uint16_t args[4]);
838 void arn_dump_line(unsigned char *p, uint32_t len, boolean_t isaddress,
839     uint32_t group);
840 void arn_dump_pkg(unsigned char *p, uint32_t len, boolean_t isaddress,
841     uint32_t group);
842 
843 struct arn_softc {
844 	ieee80211com_t sc_isc;	/* IEEE 802.11 common */
845 	dev_info_t *sc_dev;    /* back pointer to dev_info_t */
846 	ddi_taskq_t *sc_tq;    /* private task queue */
847 	struct ath_hal *sc_ah;
848 	struct ath_config sc_config;
849 	caddr_t mem;
850 
851 	uint8_t sc_isrunning; /* device is operational */
852 	uint8_t sc_mrretry;   /* multi-rate retry support */
853 	uint8_t sc_have11g;   /* have 11g support */
854 	uint8_t sc_bsync;	/* beacon sync */
855 
856 	ddi_acc_handle_t	sc_cfg_handle;    /* DDI I/O handle */
857 	ddi_acc_handle_t	sc_io_handle;	   /* DDI I/O handle */
858 	ddi_acc_handle_t	sc_EEPROM_handle; /* DDI I/O handle */
859 	ddi_iblock_cookie_t	sc_iblock;
860 	ddi_softintr_t		sc_softint_id;
861 
862 	/* 802.11n/HT capabilities */
863 	arn_ht_conf		sc_ht_conf;
864 	void			(*sc_recv_action)(ieee80211_node_t *,
865 				    const uint8_t *, const uint8_t *);
866 	int			(*sc_send_action)(ieee80211_node_t *,
867 				    int, int, uint16_t[4]);
868 
869 	/* TX/RX descriptors */
870 	struct ath_desc *sc_desc;
871 	/* descriptor structure */
872 	dma_area_t sc_desc_dma;
873 	/* pointer to the first "struct ath_buf" */
874 	struct ath_buf *sc_vbufptr;
875 	/* length of all allocated "struct ath_buf" */
876 	uint32_t sc_vbuflen;
877 	/* size of one DMA TX/RX buffer based on 802.11 MTU */
878 	uint32_t tx_dmabuf_size;
879 	uint32_t rx_dmabuf_size;
880 
881 	uint8_t sc_curbssid[6];
882 	uint8_t sc_myaddr[6];
883 	uint8_t sc_bssidmask[6];
884 
885 	int sc_debug;
886 	uint32_t sc_intrstatus;
887 	uint32_t sc_flags; /* SC_OP_* */
888 	unsigned int rx_filter;
889 	uint16_t sc_curtxpow;
890 	uint16_t sc_curaid;
891 	uint16_t sc_cachelsz;
892 	int sc_slotupdate; /* slot to next advance fsm */
893 	int sc_slottime;
894 	int sc_bslot[ATH_BCBUF];
895 	uint8_t sc_tx_chainmask;
896 	uint8_t sc_rx_chainmask;
897 	enum ath9k_int sc_imask;
898 	enum PROT_MODE sc_protmode;
899 
900 	uint8_t sc_nbcnvaps; /* # of vaps sending beacons */
901 	uint16_t sc_nvaps; /* # of active virtual ap's */
902 
903 	uint8_t sc_mcastantenna;
904 	uint8_t sc_defant; /* current default antenna */
905 	uint8_t sc_rxotherant; /* rx's on non-default antenna */
906 
907 	struct ath9k_node_stats sc_halstats; /* station-mode rssi stats */
908 	enum ath9k_ht_extprotspacing sc_ht_extprotspacing;
909 	enum ath9k_ht_macmode tx_chan_width;
910 
911 	enum {
912 		OK, /* no change needed */
913 		UPDATE, /* update pending */
914 		COMMIT /* beacon sent, commit change */
915 	} sc_updateslot; /* slot time update fsm */
916 
917 	/* Crypto */
918 	uint32_t	sc_keymax; /* size of key cache */
919 	uint8_t		sc_keymap[16]; /* bit map of key cache use */
920 	uint8_t		sc_splitmic; /* split TKIP MIC keys */
921 
922 	/* RX */
923 	list_t		sc_rxbuf_list;
924 	int		sc_rxbufsize; /* rx size based on mtu */
925 	uint32_t 	*sc_rxlink; /* link ptr in last RX desc */
926 	uint32_t	sc_rx_pend;
927 	uint64_t	sc_lastrx; /* tsf at last rx'd frame */
928 
929 	/* TX */
930 	list_t sc_txbuf_list;
931 	struct ath_txq 	sc_txq[ATH9K_NUM_TX_QUEUES];
932 	uint32_t sc_txqsetup;
933 	int sc_haltype2q[ATH9K_WME_AC_VO+1]; /* HAL WME AC -> h/w qnum */
934 	uint16_t seq_no; /* TX sequence number */
935 
936 	/* Beacon */
937 	struct ath9k_tx_queue_info sc_beacon_qi;
938 	struct ath_txq *sc_cabq;
939 	list_t sc_bcbuf_list;	/* beacon buffer */
940 	uint32_t sc_beaconq;
941 	uint32_t sc_bmisscount;
942 	uint32_t ast_be_xmit;	/* beacons transmitted */
943 	uint64_t bc_tstamp;
944 	struct ieee80211_beacon_offsets asc_boff; /* dynamic update state */
945 
946 	/* Rate */
947 	struct ath_rate_table *hw_rate_table[ATH9K_MODE_MAX];
948 	struct ath_rate_table *sc_currates; /* current rate table */
949 	uint8_t	asc_rixmap[256]; /* IEEE to h/w rate table ix */
950 	uint8_t sc_protrix;		/* protection rate index */
951 
952 	/* mode */
953 	enum wireless_mode	sc_curmode; /* current phy mode */
954 
955 	/* Channel, Band */
956 	struct ath9k_channel sc_curchan;
957 
958 	/* Locks */
959 	kmutex_t	sc_genlock;
960 	kmutex_t	sc_serial_rw;
961 	kmutex_t	sc_rxbuflock;	/* recv lock  */
962 	kmutex_t	sc_txbuflock;	/* txbuf lock */
963 	kmutex_t	sc_rxflushlock;
964 	kmutex_t	sc_resetlock;
965 	kmutex_t	sc_bcbuflock;	/* beacon buffer lock */
966 	kmutex_t	sc_resched_lock;
967 	boolean_t	sc_resched_needed;
968 
969 	/* LEDs */
970 	struct ath_led 	radio_led;
971 	struct ath_led 	assoc_led;
972 	struct ath_led 	tx_led;
973 	struct ath_led 	rx_led;
974 
975 	uint8_t		sc_mcast_refs[64]; /* refer count */
976 	uint32_t	sc_mcast_hash[2]; /* multicast hash table */
977 
978 	/* Rfkill */
979 
980 	/* ANI */
981 	struct ath_ani sc_ani;
982 
983 	/* interface statistics */
984 	struct ath_stats sc_stats;
985 
986 	boolean_t sc_promisc; /* Promiscuous mode enabled */
987 
988 	timeout_id_t sc_scan_timer;
989 	timeout_id_t sc_cal_timer;
990 
991 	int (*sc_newstate)(ieee80211com_t *, enum ieee80211_state, int);
992 	void (*sc_recv_mgmt)(ieee80211com_t *, mblk_t *, ieee80211_node_t *,
993 	    int, int, uint32_t);
994 };
995 
996 int arn_reset(ieee80211com_t *ic);
997 
998 int arn_get_hal_qnum(uint16_t queue, struct arn_softc *sc);
999 
1000 int ath_cabq_update(struct arn_softc *);
1001 
1002 void arn_update_chainmask(struct arn_softc *sc);
1003 
1004 /*
1005  * Read and write, they both share the same lock. We do this to serialize
1006  * reads and writes on Atheros 802.11n PCI devices only. This is required
1007  * as the FIFO on these devices can only accept sanely 2 requests. After
1008  * that the device goes bananas. Serializing the reads/writes prevents this
1009  * from happening.
1010  */
1011 void
1012 arn_iowrite32(struct ath_hal *ah, uint32_t reg_offset, uint32_t val);
1013 unsigned int
1014 arn_ioread32(struct ath_hal *ah, uint32_t reg_offset);
1015 
1016 #ifdef __cplusplus
1017 }
1018 #endif
1019 
1020 #endif /* _ARN_CORE_H */
1021