2 * Copyright (c) 2008 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/version.h>
21 #include <linux/autoconf.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/spinlock.h>
25 #include <linux/errno.h>
26 #include <linux/skbuff.h>
27 #include <linux/netdevice.h>
28 #include <linux/etherdevice.h>
30 #include <linux/tcp.h>
32 #include <linux/delay.h>
33 #include <linux/wait.h>
34 #include <linux/pci.h>
35 #include <linux/interrupt.h>
36 #include <linux/sched.h>
37 #include <linux/list.h>
38 #include <asm/byteorder.h>
39 #include <linux/scatterlist.h>
41 #include <net/mac80211.h>
42 #include <linux/leds.h>
53 /* Macro to expand scalars to 64-bit objects */
55 #define ito64(x) (sizeof(x) == 8) ? \
56 (((unsigned long long int)(x)) & (0xff)) : \
58 (((unsigned long long int)(x)) & 0xffff) : \
59 ((sizeof(x) == 32) ? \
60 (((unsigned long long int)(x)) & 0xffffffff) : \
61 (unsigned long long int)(x))
63 /* increment with wrap-around */
64 #define INCR(_l, _sz) do { \
66 (_l) &= ((_sz) - 1); \
69 /* decrement with wrap-around */
70 #define DECR(_l, _sz) do { \
72 (_l) &= ((_sz) - 1); \
75 #define A_MAX(a, b) ((a) > (b) ? (a) : (b))
77 #define ASSERT(exp) do { \
78 if (unlikely(!(exp))) { \
83 #define TSF_TO_TU(_h,_l) \
84 ((((u32)(_h)) << 22) | (((u32)(_l)) >> 10))
87 #define memzero(_buf, _len) memset(_buf, 0, _len)
89 #define ATH9K_BH_STATUS_INTACT 0
90 #define ATH9K_BH_STATUS_CHANGE 1
92 #define ATH_TXQ_SETUP(sc, i) ((sc)->sc_txqsetup & (1<<i))
94 static inline unsigned long get_timestamp(void)
96 return ((jiffies / HZ) * 1000) + (jiffies % HZ) * (1000 / HZ);
99 static const u8 ath_bcast_mac[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
106 ATH_DBG_RESET = 0x00000001,
107 ATH_DBG_PHY_IO = 0x00000002,
108 ATH_DBG_REG_IO = 0x00000004,
109 ATH_DBG_QUEUE = 0x00000008,
110 ATH_DBG_EEPROM = 0x00000010,
111 ATH_DBG_NF_CAL = 0x00000020,
112 ATH_DBG_CALIBRATE = 0x00000040,
113 ATH_DBG_CHANNEL = 0x00000080,
114 ATH_DBG_INTERRUPT = 0x00000100,
115 ATH_DBG_REGULATORY = 0x00000200,
116 ATH_DBG_ANI = 0x00000400,
117 ATH_DBG_POWER_MGMT = 0x00000800,
118 ATH_DBG_XMIT = 0x00001000,
119 ATH_DBG_BEACON = 0x00002000,
120 ATH_DBG_RATE = 0x00004000,
121 ATH_DBG_CONFIG = 0x00008000,
122 ATH_DBG_KEYCACHE = 0x00010000,
123 ATH_DBG_AGGR = 0x00020000,
124 ATH_DBG_FATAL = 0x00040000,
125 ATH_DBG_ANY = 0xffffffff
128 #define DBG_DEFAULT (ATH_DBG_FATAL)
130 #define DPRINTF(sc, _m, _fmt, ...) do { \
131 if (sc->sc_debug & (_m)) \
132 printk(_fmt , ##__VA_ARGS__); \
135 /***************************/
136 /* Load-time Configuration */
137 /***************************/
139 /* Per-instance load-time (note: NOT run-time) configurations
140 * for Atheros Device */
144 u16 txpowlimit_override;
145 u8 cabqReadytime; /* Cabq Readytime % */
146 u8 swBeaconProcess; /* Process received beacons in SW (vs HW) */
149 /***********************/
150 /* Chainmask Selection */
151 /***********************/
153 #define ATH_CHAINMASK_SEL_TIMEOUT 6000
154 /* Default - Number of last RSSI values that is used for
155 * chainmask selection */
156 #define ATH_CHAINMASK_SEL_RSSI_CNT 10
157 /* Means use 3x3 chainmask instead of configured chainmask */
158 #define ATH_CHAINMASK_SEL_3X3 7
159 /* Default - Rssi threshold below which we have to switch to 3x3 */
160 #define ATH_CHAINMASK_SEL_UP_RSSI_THRES 20
161 /* Default - Rssi threshold above which we have to switch to
162 * user configured values */
163 #define ATH_CHAINMASK_SEL_DOWN_RSSI_THRES 35
164 /* Struct to store the chainmask select related info */
165 struct ath_chainmask_sel {
166 struct timer_list timer;
167 int cur_tx_mask; /* user configured or 3x3 */
168 int cur_rx_mask; /* user configured or 3x3 */
170 u8 switch_allowed:1, /* timer will set this */
174 int ath_chainmask_sel_logic(struct ath_softc *sc, struct ath_node *an);
175 void ath_update_chainmask(struct ath_softc *sc, int is_ht);
177 /*************************/
178 /* Descriptor Management */
179 /*************************/
181 #define ATH_TXBUF_RESET(_bf) do { \
182 (_bf)->bf_status = 0; \
183 (_bf)->bf_lastbf = NULL; \
184 (_bf)->bf_lastfrm = NULL; \
185 (_bf)->bf_next = NULL; \
186 memzero(&((_bf)->bf_state), \
187 sizeof(struct ath_buf_state)); \
197 BUF_SHORT_PREAMBLE = BIT(6),
200 BUF_AGGR_BURST = BIT(9),
201 BUF_CALC_AIRTIME = BIT(10),
204 struct ath_buf_state {
205 int bfs_nframes; /* # frames in aggregate */
206 u16 bfs_al; /* length of aggregate */
207 u16 bfs_frmlen; /* length of frame */
208 int bfs_seqno; /* sequence number */
209 int bfs_tidno; /* tid of this frame */
210 int bfs_retries; /* current retries */
211 struct ath_rc_series bfs_rcs[4]; /* rate series */
212 u32 bf_type; /* BUF_* (enum buffer_type) */
213 /* key type use to encrypt this frame */
214 enum ath9k_key_type bfs_keytype;
217 #define bf_nframes bf_state.bfs_nframes
218 #define bf_al bf_state.bfs_al
219 #define bf_frmlen bf_state.bfs_frmlen
220 #define bf_retries bf_state.bfs_retries
221 #define bf_seqno bf_state.bfs_seqno
222 #define bf_tidno bf_state.bfs_tidno
223 #define bf_rcs bf_state.bfs_rcs
224 #define bf_keytype bf_state.bfs_keytype
225 #define bf_isdata(bf) (bf->bf_state.bf_type & BUF_DATA)
226 #define bf_isaggr(bf) (bf->bf_state.bf_type & BUF_AGGR)
227 #define bf_isampdu(bf) (bf->bf_state.bf_type & BUF_AMPDU)
228 #define bf_isht(bf) (bf->bf_state.bf_type & BUF_HT)
229 #define bf_isretried(bf) (bf->bf_state.bf_type & BUF_RETRY)
230 #define bf_isxretried(bf) (bf->bf_state.bf_type & BUF_XRETRY)
231 #define bf_isshpreamble(bf) (bf->bf_state.bf_type & BUF_SHORT_PREAMBLE)
232 #define bf_isbar(bf) (bf->bf_state.bf_type & BUF_BAR)
233 #define bf_ispspoll(bf) (bf->bf_state.bf_type & BUF_PSPOLL)
234 #define bf_isaggrburst(bf) (bf->bf_state.bf_type & BUF_AGGR_BURST)
237 * Abstraction of a contiguous buffer to transmit/receive. There is only
238 * a single hw descriptor encapsulated here.
241 struct list_head list;
242 struct list_head *last;
243 struct ath_buf *bf_lastbf; /* last buf of this unit (a frame or
245 struct ath_buf *bf_lastfrm; /* last buf of this frame */
246 struct ath_buf *bf_next; /* next subframe in the aggregate */
247 struct ath_buf *bf_rifslast; /* last buf for RIFS burst */
248 void *bf_mpdu; /* enclosing frame structure */
249 void *bf_node; /* pointer to the node */
250 struct ath_desc *bf_desc; /* virtual addr of desc */
251 dma_addr_t bf_daddr; /* physical addr of desc */
252 dma_addr_t bf_buf_addr; /* physical addr of data buffer */
254 u16 bf_flags; /* tx descriptor flags */
255 struct ath_buf_state bf_state; /* buffer state */
256 dma_addr_t bf_dmacontext;
260 * reset the rx buffer.
261 * any new fields added to the athbuf and require
262 * reset need to be added to this macro.
263 * currently bf_status is the only one requires that
266 #define ATH_RXBUF_RESET(_bf) ((_bf)->bf_status = 0)
268 /* hw processing complete, desc processed by hal */
269 #define ATH_BUFSTATUS_DONE 0x00000001
270 /* hw processing complete, desc hold for hw */
271 #define ATH_BUFSTATUS_STALE 0x00000002
272 /* Rx-only: OS is done with this packet and it's ok to queued it to hw */
273 #define ATH_BUFSTATUS_FREE 0x00000004
275 /* DMA state for tx/rx descriptors */
279 struct ath_desc *dd_desc; /* descriptors */
280 dma_addr_t dd_desc_paddr; /* physical addr of dd_desc */
281 u32 dd_desc_len; /* size of dd_desc */
282 struct ath_buf *dd_bufptr; /* associated buffers */
283 dma_addr_t dd_dmacontext;
286 /* Abstraction of a received RX MPDU/MMPDU, or a RX fragment */
288 struct ath_rx_context {
289 struct ath_buf *ctx_rxbuf; /* associated ath_buf for rx */
291 #define ATH_RX_CONTEXT(skb) ((struct ath_rx_context *)skb->cb)
293 int ath_descdma_setup(struct ath_softc *sc,
294 struct ath_descdma *dd,
295 struct list_head *head,
299 int ath_desc_alloc(struct ath_softc *sc);
300 void ath_desc_free(struct ath_softc *sc);
301 void ath_descdma_cleanup(struct ath_softc *sc,
302 struct ath_descdma *dd,
303 struct list_head *head);
309 #define ATH_MAX_ANTENNA 3
310 #define ATH_RXBUF 512
311 #define ATH_RX_TIMEOUT 40 /* 40 milliseconds */
312 #define WME_NUM_TID 16
313 #define IEEE80211_BAR_CTL_TID_M 0xF000 /* tid mask */
314 #define IEEE80211_BAR_CTL_TID_S 2 /* tid shift */
317 ATH_RX_NON_CONSUMED = 0,
321 /* per frame rx status block */
322 struct ath_recv_status {
323 u64 tsf; /* mac tsf */
324 int8_t rssi; /* RSSI (noise floor ajusted) */
325 int8_t rssictl[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */
326 int8_t rssiextn[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */
327 int8_t abs_rssi; /* absolute RSSI */
328 u8 rateieee; /* data rate received (IEEE rate code) */
329 u8 ratecode; /* phy rate code */
330 int rateKbps; /* data rate received (Kbps) */
331 int antenna; /* rx antenna */
332 int flags; /* status of associated skb */
333 #define ATH_RX_FCS_ERROR 0x01
334 #define ATH_RX_MIC_ERROR 0x02
335 #define ATH_RX_DECRYPT_ERROR 0x04
336 #define ATH_RX_RSSI_VALID 0x08
337 /* if any of ctl,extn chainrssis are valid */
338 #define ATH_RX_CHAIN_RSSI_VALID 0x10
339 /* if extn chain rssis are valid */
340 #define ATH_RX_RSSI_EXTN_VALID 0x20
341 /* set if 40Mhz, clear if 20Mhz */
342 #define ATH_RX_40MHZ 0x40
343 /* set if short GI, clear if full GI */
344 #define ATH_RX_SHORT_GI 0x80
348 struct sk_buff *rx_wbuf;
349 unsigned long rx_time; /* system time when received */
350 struct ath_recv_status rx_status; /* cached rx status */
353 /* Per-TID aggregate receiver state for a node */
356 struct ath_rxbuf *rxbuf; /* re-ordering buffer */
357 struct timer_list timer;
359 int baw_head; /* seq_next at head */
360 int baw_tail; /* tail of block-ack window */
361 int seq_reset; /* need to reset start sequence */
362 int addba_exchangecomplete;
363 u16 seq_next; /* next expected sequence */
364 u16 baw_size; /* block-ack window size */
367 /* Per-node receiver aggregate state */
369 struct ath_arx_tid tid[WME_NUM_TID];
372 int ath_startrecv(struct ath_softc *sc);
373 bool ath_stoprecv(struct ath_softc *sc);
374 void ath_flushrecv(struct ath_softc *sc);
375 u32 ath_calcrxfilter(struct ath_softc *sc);
376 void ath_rx_node_init(struct ath_softc *sc, struct ath_node *an);
377 void ath_rx_node_free(struct ath_softc *sc, struct ath_node *an);
378 void ath_rx_node_cleanup(struct ath_softc *sc, struct ath_node *an);
379 void ath_handle_rx_intr(struct ath_softc *sc);
380 int ath_rx_init(struct ath_softc *sc, int nbufs);
381 void ath_rx_cleanup(struct ath_softc *sc);
382 int ath_rx_tasklet(struct ath_softc *sc, int flush);
383 int ath_rx_input(struct ath_softc *sc,
384 struct ath_node *node,
387 struct ath_recv_status *rx_status,
388 enum ATH_RX_TYPE *status);
389 int _ath_rx_indicate(struct ath_softc *sc,
391 struct ath_recv_status *status,
393 int ath_rx_subframe(struct ath_node *an, struct sk_buff *skb,
394 struct ath_recv_status *status);
400 #define ATH_TXBUF 512
401 /* max number of transmit attempts (tries) */
402 #define ATH_TXMAXTRY 13
403 /* max number of 11n transmit attempts (tries) */
404 #define ATH_11N_TXMAXTRY 10
405 /* max number of tries for management and control frames */
406 #define ATH_MGT_TXMAXTRY 4
407 #define WME_BA_BMP_SIZE 64
408 #define WME_MAX_BA WME_BA_BMP_SIZE
409 #define ATH_TID_MAX_BUFS (2 * WME_MAX_BA)
410 #define TID_TO_WME_AC(_tid) \
411 ((((_tid) == 0) || ((_tid) == 3)) ? WME_AC_BE : \
412 (((_tid) == 1) || ((_tid) == 2)) ? WME_AC_BK : \
413 (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI : \
417 /* Wireless Multimedia Extension Defines */
418 #define WME_AC_BE 0 /* best effort */
419 #define WME_AC_BK 1 /* background */
420 #define WME_AC_VI 2 /* video */
421 #define WME_AC_VO 3 /* voice */
426 ATH_SM_PWRSAV_STATIC,
427 ATH_SM_PWRSAV_DYNAMIC,
431 * Data transmit queue state. One of these exists for each
432 * hardware transmit queue. Packets sent to us from above
433 * are assigned to queues based on their priority. Not all
434 * devices support a complete set of hardware transmit queues.
435 * For those devices the array sc_ac2q will map multiple
436 * priorities to fewer hardware queues (typically all to one
440 u32 axq_qnum; /* hardware q number */
441 u32 *axq_link; /* link ptr in last TX desc */
442 struct list_head axq_q; /* transmit queue */
444 unsigned long axq_lockflags; /* intr state when must cli */
445 u32 axq_depth; /* queue depth */
446 u8 axq_aggr_depth; /* aggregates queued */
447 u32 axq_totalqueued; /* total ever queued */
449 /* count to determine if descriptor should generate int on this txq. */
452 bool stopped; /* Is mac80211 queue stopped ? */
453 struct ath_buf *axq_linkbuf; /* virtual addr of last buffer*/
455 /* first desc of the last descriptor that contains CTS */
456 struct ath_desc *axq_lastdsWithCTS;
458 /* final desc of the gating desc that determines whether
459 lastdsWithCTS has been DMA'ed or not */
460 struct ath_desc *axq_gatingds;
462 struct list_head axq_acq;
465 /* per TID aggregate tx state for a destination */
467 struct list_head list; /* round-robin tid entry */
468 struct list_head buf_q; /* pending buffers */
470 struct ath_atx_ac *ac;
471 struct ath_buf *tx_buf[ATH_TID_MAX_BUFS]; /* active tx frames */
476 int baw_head; /* first un-acked tx buffer */
477 int baw_tail; /* next unused tx buffer slot */
480 int cleanup_inprogress;
481 u32 addba_exchangecomplete:1;
482 int32_t addba_exchangeinprogress;
483 int addba_exchangeattempts;
486 /* per access-category aggregate tx state for a destination */
488 int sched; /* dest-ac is scheduled */
489 int qnum; /* H/W queue number associated
491 struct list_head list; /* round-robin txq entry */
492 struct list_head tid_q; /* queue of TIDs with buffers */
495 /* per dest tx state */
497 struct ath_atx_tid tid[WME_NUM_TID];
498 struct ath_atx_ac ac[WME_NUM_AC];
501 /* per-frame tx control block */
502 struct ath_tx_control {
509 enum ath9k_pkt_type atype;
510 enum ath9k_key_type keytype;
519 struct ath_softc *dev;
520 dma_addr_t dmacontext;
523 /* per frame tx status block */
524 struct ath_xmit_status {
525 int retries; /* number of retries to successufully
526 transmit this frame */
527 int flags; /* status of transmit */
528 #define ATH_TX_ERROR 0x01
529 #define ATH_TX_XRETRY 0x02
530 #define ATH_TX_BAR 0x04
534 int rssi; /* RSSI (noise floor ajusted) */
535 int rssictl[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */
536 int rssiextn[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */
537 int rateieee; /* data rate xmitted (IEEE rate code) */
538 int rateKbps; /* data rate xmitted (Kbps) */
539 int ratecode; /* phy rate code */
540 int flags; /* validity flags */
541 /* if any of ctl,extn chain rssis are valid */
542 #define ATH_TX_CHAIN_RSSI_VALID 0x01
543 /* if extn chain rssis are valid */
544 #define ATH_TX_RSSI_EXTN_VALID 0x02
545 u32 airtime; /* time on air per final tx rate */
548 struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype);
549 void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq);
550 int ath_tx_setup(struct ath_softc *sc, int haltype);
551 void ath_draintxq(struct ath_softc *sc, bool retry_tx);
552 void ath_tx_draintxq(struct ath_softc *sc,
553 struct ath_txq *txq, bool retry_tx);
554 void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an);
555 void ath_tx_node_cleanup(struct ath_softc *sc,
556 struct ath_node *an, bool bh_flag);
557 void ath_tx_node_free(struct ath_softc *sc, struct ath_node *an);
558 void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq);
559 int ath_tx_init(struct ath_softc *sc, int nbufs);
560 int ath_tx_cleanup(struct ath_softc *sc);
561 int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype);
562 int ath_txq_update(struct ath_softc *sc, int qnum,
563 struct ath9k_tx_queue_info *q);
564 int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb);
565 void ath_tx_tasklet(struct ath_softc *sc);
566 u32 ath_txq_depth(struct ath_softc *sc, int qnum);
567 u32 ath_txq_aggr_depth(struct ath_softc *sc, int qnum);
568 void ath_notify_txq_status(struct ath_softc *sc, u16 queue_depth);
569 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
570 struct ath_xmit_status *tx_status, struct ath_node *an);
571 void ath_tx_cabq(struct ath_softc *sc, struct sk_buff *skb);
573 /**********************/
574 /* Node / Aggregation */
575 /**********************/
577 /* indicates the node is clened up */
578 #define ATH_NODE_CLEAN 0x1
579 /* indicates the node is 80211 power save */
580 #define ATH_NODE_PWRSAVE 0x2
582 #define ADDBA_EXCHANGE_ATTEMPTS 10
583 #define ATH_AGGR_DELIM_SZ 4 /* delimiter size */
584 #define ATH_AGGR_MINPLEN 256 /* in bytes, minimum packet length */
585 /* number of delimiters for encryption padding */
586 #define ATH_AGGR_ENCRYPTDELIM 10
587 /* minimum h/w qdepth to be sustained to maximize aggregation */
588 #define ATH_AGGR_MIN_QDEPTH 2
589 #define ATH_AMPDU_SUBFRAME_DEFAULT 32
590 #define IEEE80211_SEQ_SEQ_SHIFT 4
591 #define IEEE80211_SEQ_MAX 4096
592 #define IEEE80211_MIN_AMPDU_BUF 0x8
594 /* return whether a bit at index _n in bitmap _bm is set
595 * _sz is the size of the bitmap */
596 #define ATH_BA_ISSET(_bm, _n) (((_n) < (WME_BA_BMP_SIZE)) && \
597 ((_bm)[(_n) >> 5] & (1 << ((_n) & 31))))
599 /* return block-ack bitmap index given sequence and starting sequence */
600 #define ATH_BA_INDEX(_st, _seq) (((_seq) - (_st)) & (IEEE80211_SEQ_MAX - 1))
602 /* returns delimiter padding required given the packet length */
603 #define ATH_AGGR_GET_NDELIM(_len) \
604 (((((_len) + ATH_AGGR_DELIM_SZ) < ATH_AGGR_MINPLEN) ? \
605 (ATH_AGGR_MINPLEN - (_len) - ATH_AGGR_DELIM_SZ) : 0) >> 2)
607 #define BAW_WITHIN(_start, _bawsz, _seqno) \
608 ((((_seqno) - (_start)) & 4095) < (_bawsz))
610 #define ATH_DS_BA_SEQ(_ds) ((_ds)->ds_us.tx.ts_seqnum)
611 #define ATH_DS_BA_BITMAP(_ds) (&(_ds)->ds_us.tx.ba_low)
612 #define ATH_DS_TX_BA(_ds) ((_ds)->ds_us.tx.ts_flags & ATH9K_TX_BA)
613 #define ATH_AN_2_TID(_an, _tidno) (&(_an)->an_aggr.tx.tid[(_tidno)])
615 enum ATH_AGGR_STATUS {
623 enum ATH_AGGR_CHECK {
626 AGGR_CLEANUP_PROGRESS,
627 AGGR_EXCHANGE_PROGRESS,
631 struct aggr_rifs_param {
632 int param_max_frames;
636 struct ath_rc_series *param_rcs;
639 /* Per-node aggregation state */
640 struct ath_node_aggr {
641 struct ath_atx tx; /* node transmit state */
642 struct ath_arx rx; /* node receive state */
645 /* driver-specific node state */
647 struct list_head list;
648 struct ath_softc *an_sc;
650 struct ath_chainmask_sel an_chainmask_sel;
651 struct ath_node_aggr an_aggr;
652 u8 an_smmode; /* SM Power save mode */
654 u8 an_addr[ETH_ALEN];
657 void ath_tx_resume_tid(struct ath_softc *sc,
658 struct ath_atx_tid *tid);
659 enum ATH_AGGR_CHECK ath_tx_aggr_check(struct ath_softc *sc,
660 struct ath_node *an, u8 tidno);
661 void ath_tx_aggr_teardown(struct ath_softc *sc,
662 struct ath_node *an, u8 tidno);
663 void ath_rx_aggr_teardown(struct ath_softc *sc,
664 struct ath_node *an, u8 tidno);
665 int ath_rx_aggr_start(struct ath_softc *sc,
669 int ath_rx_aggr_stop(struct ath_softc *sc,
672 int ath_tx_aggr_start(struct ath_softc *sc,
676 int ath_tx_aggr_stop(struct ath_softc *sc,
679 void ath_newassoc(struct ath_softc *sc,
680 struct ath_node *node, int isnew, int isuapsd);
681 struct ath_node *ath_node_attach(struct ath_softc *sc,
682 u8 addr[ETH_ALEN], int if_id);
683 void ath_node_detach(struct ath_softc *sc, struct ath_node *an, bool bh_flag);
684 struct ath_node *ath_node_get(struct ath_softc *sc, u8 addr[ETH_ALEN]);
685 void ath_node_put(struct ath_softc *sc, struct ath_node *an, bool bh_flag);
686 struct ath_node *ath_node_find(struct ath_softc *sc, u8 *addr);
688 /*******************/
689 /* Beacon Handling */
690 /*******************/
693 * Regardless of the number of beacons we stagger, (i.e. regardless of the
694 * number of BSSIDs) if a given beacon does not go out even after waiting this
695 * number of beacon intervals, the game's up.
697 #define BSTUCK_THRESH (9 * ATH_BCBUF)
698 #define ATH_BCBUF 4 /* number of beacon buffers */
699 #define ATH_DEFAULT_BINTVAL 100 /* default beacon interval in TU */
700 #define ATH_DEFAULT_BMISS_LIMIT 10
701 #define IEEE80211_MS_TO_TU(x) (((x) * 1000) / 1024)
703 /* beacon configuration */
704 struct ath_beacon_config {
714 } u; /* last received beacon/probe response timestamp of this BSS. */
717 void ath9k_beacon_tasklet(unsigned long data);
718 void ath_beacon_config(struct ath_softc *sc, int if_id);
719 int ath_beaconq_setup(struct ath_hal *ah);
720 int ath_beacon_alloc(struct ath_softc *sc, int if_id);
721 void ath_bstuck_process(struct ath_softc *sc);
722 void ath_beacon_return(struct ath_softc *sc, struct ath_vap *avp);
723 void ath_beacon_sync(struct ath_softc *sc, int if_id);
724 void ath_get_beaconconfig(struct ath_softc *sc,
726 struct ath_beacon_config *conf);
732 * Define the scheme that we select MAC address for multiple
733 * BSS on the same radio. The very first VAP will just use the MAC
734 * address from the EEPROM. For the next 3 VAPs, we set the
735 * U/L bit (bit 1) in MAC address, and use the next two bits as the
739 #define ATH_SET_VAP_BSSID_MASK(bssid_mask) \
740 ((bssid_mask)[0] &= ~(((ATH_BCBUF-1)<<2)|0x02))
742 /* VAP configuration (from protocol layer) */
743 struct ath_vap_config {
744 u32 av_fixed_rateset;
745 u32 av_fixed_retryset;
748 /* driver-specific vap state */
750 struct ieee80211_vif *av_if_data;
751 enum ath9k_opmode av_opmode; /* VAP operational mode */
752 struct ath_buf *av_bcbuf; /* beacon buffer */
753 struct ath_tx_control av_btxctl; /* txctl information for beacon */
754 int av_bslot; /* beacon slot index */
755 struct ath_vap_config av_config;/* vap configuration parameters*/
756 struct ath_rate_node *rc_node;
759 int ath_vap_attach(struct ath_softc *sc,
761 struct ieee80211_vif *if_data,
762 enum ath9k_opmode opmode);
763 int ath_vap_detach(struct ath_softc *sc, int if_id);
764 int ath_vap_config(struct ath_softc *sc,
765 int if_id, struct ath_vap_config *if_config);
767 /*********************/
768 /* Antenna diversity */
769 /*********************/
771 #define ATH_ANT_DIV_MAX_CFG 2
772 #define ATH_ANT_DIV_MIN_IDLE_US 1000000 /* us */
773 #define ATH_ANT_DIV_MIN_SCAN_US 50000 /* us */
775 enum ATH_ANT_DIV_STATE{
777 ATH_ANT_DIV_SCAN, /* evaluating antenna */
781 struct ath_softc *antdiv_sc;
783 enum ATH_ANT_DIV_STATE antdiv_state;
784 u8 antdiv_num_antcfg;
787 int32_t antdivf_rssitrig;
788 int32_t antdiv_lastbrssi[ATH_ANT_DIV_MAX_CFG];
789 u64 antdiv_lastbtsf[ATH_ANT_DIV_MAX_CFG];
790 u64 antdiv_laststatetsf;
791 u8 antdiv_bssid[ETH_ALEN];
794 void ath_slow_ant_div_init(struct ath_antdiv *antdiv,
795 struct ath_softc *sc, int32_t rssitrig);
796 void ath_slow_ant_div_start(struct ath_antdiv *antdiv,
799 void ath_slow_ant_div_stop(struct ath_antdiv *antdiv);
800 void ath_slow_ant_div(struct ath_antdiv *antdiv,
801 struct ieee80211_hdr *wh,
802 struct ath_rx_status *rx_stats);
803 void ath_setdefantenna(void *sc, u32 antenna);
805 /********************/
807 /********************/
809 #define ATH_LED_PIN 1
819 struct ath_softc *sc;
820 struct led_classdev led_cdev;
821 enum ath_led_type led_type;
826 /********************/
827 /* Main driver core */
828 /********************/
831 * Default cache line size, in bytes.
832 * Used when PCI device not fully initialized by bootrom/BIOS
834 #define DEFAULT_CACHELINE 32
835 #define ATH_DEFAULT_NOISE_FLOOR -95
836 #define ATH_REGCLASSIDS_MAX 10
837 #define ATH_CABQ_READY_TIME 80 /* % of beacon interval */
838 #define ATH_MAX_SW_RETRIES 10
839 #define ATH_CHAN_MAX 255
840 #define IEEE80211_WEP_NKID 4 /* number of key ids */
841 #define IEEE80211_RATE_VAL 0x7f
843 * The key cache is used for h/w cipher state and also for
844 * tracking station state such as the current tx antenna.
845 * We also setup a mapping table between key cache slot indices
846 * and station state to short-circuit node lookups on rx.
847 * Different parts have different size key caches. We handle
848 * up to ATH_KEYMAX entries (could dynamically allocate state).
850 #define ATH_KEYMAX 128 /* max key cache size we handle */
852 #define ATH_IF_ID_ANY 0xff
853 #define ATH_TXPOWER_MAX 100 /* .5 dBm units */
855 #define RSSI_LPF_THRESHOLD -20
856 #define ATH_RSSI_EP_MULTIPLIER (1<<7) /* pow2 to optimize out * and / */
857 #define ATH_RATE_DUMMY_MARKER 0
858 #define ATH_RSSI_LPF_LEN 10
859 #define ATH_RSSI_DUMMY_MARKER 0x127
861 #define ATH_EP_MUL(x, mul) ((x) * (mul))
862 #define ATH_EP_RND(x, mul) \
863 ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
864 #define ATH_RSSI_OUT(x) \
865 (((x) != ATH_RSSI_DUMMY_MARKER) ? \
866 (ATH_EP_RND((x), ATH_RSSI_EP_MULTIPLIER)) : ATH_RSSI_DUMMY_MARKER)
867 #define ATH_RSSI_IN(x) \
868 (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
869 #define ATH_LPF_RSSI(x, y, len) \
870 ((x != ATH_RSSI_DUMMY_MARKER) ? \
871 (((x) * ((len) - 1) + (y)) / (len)) : (y))
872 #define ATH_RSSI_LPF(x, y) do { \
873 if ((y) >= RSSI_LPF_THRESHOLD) \
874 x = ATH_LPF_RSSI((x), \
875 ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN); \
892 enum ath9k_ht_macmode tx_chan_width;
898 #define SC_OP_INVALID BIT(0)
899 #define SC_OP_BEACONS BIT(1)
900 #define SC_OP_RXAGGR BIT(2)
901 #define SC_OP_TXAGGR BIT(3)
902 #define SC_OP_CHAINMASK_UPDATE BIT(4)
903 #define SC_OP_FULL_RESET BIT(5)
904 #define SC_OP_NO_RESET BIT(6)
905 #define SC_OP_PREAMBLE_SHORT BIT(7)
906 #define SC_OP_PROTECT_ENABLE BIT(8)
907 #define SC_OP_RXFLUSH BIT(9)
908 #define SC_OP_LED_ASSOCIATED BIT(10)
911 struct ieee80211_hw *hw;
912 struct pci_dev *pdev;
913 struct tasklet_struct intr_tq;
914 struct tasklet_struct bcon_tasklet;
915 struct ath_config sc_config;
916 struct ath_hal *sc_ah;
917 struct ath_rate_softc *sc_rc;
920 u8 sc_curbssid[ETH_ALEN];
921 u8 sc_myaddr[ETH_ALEN];
922 u8 sc_bssidmask[ETH_ALEN];
926 u32 sc_flags; /* SC_OP_* */
927 unsigned int rx_filter;
931 int sc_slotupdate; /* slot to next advance fsm */
933 int sc_bslot[ATH_BCBUF];
936 enum ath9k_int sc_imask;
937 enum wireless_mode sc_curmode; /* current phy mode */
938 enum PROT_MODE sc_protmode;
940 u8 sc_nbcnvaps; /* # of vaps sending beacons */
941 u16 sc_nvaps; /* # of active virtual ap's */
942 struct ath_vap *sc_vaps[ATH_BCBUF];
945 u8 sc_defant; /* current default antenna */
946 u8 sc_rxotherant; /* rx's on non-default antenna */
948 struct ath9k_node_stats sc_halstats; /* station-mode rssi stats */
949 struct list_head node_list;
950 struct ath_ht_info sc_ht_info;
951 enum ath9k_ht_extprotspacing sc_ht_extprotspacing;
953 #ifdef CONFIG_SLOW_ANT_DIV
954 struct ath_antdiv sc_antdiv;
957 OK, /* no change needed */
958 UPDATE, /* update pending */
959 COMMIT /* beacon sent, commit change */
960 } sc_updateslot; /* slot time update fsm */
963 u32 sc_keymax; /* size of key cache */
964 DECLARE_BITMAP(sc_keymap, ATH_KEYMAX); /* key use bit map */
965 u8 sc_splitmic; /* split TKIP MIC keys */
969 struct list_head sc_rxbuf;
970 struct ath_descdma sc_rxdma;
971 int sc_rxbufsize; /* rx size based on mtu */
972 u32 *sc_rxlink; /* link ptr in last RX desc */
975 struct list_head sc_txbuf;
976 struct ath_txq sc_txq[ATH9K_NUM_TX_QUEUES];
977 struct ath_descdma sc_txdma;
979 u32 sc_txintrperiod; /* tx interrupt batching */
980 int sc_haltype2q[ATH9K_WME_AC_VO+1]; /* HAL WME AC -> h/w qnum */
981 u16 seq_no; /* TX sequence number */
984 struct ath9k_tx_queue_info sc_beacon_qi;
985 struct ath_descdma sc_bdma;
986 struct ath_txq *sc_cabq;
987 struct list_head sc_bbuf;
990 u32 ast_be_xmit; /* beacons transmitted */
993 struct ieee80211_rate rates[IEEE80211_NUM_BANDS][ATH_RATE_MAX];
994 const struct ath9k_rate_table *sc_currates;
995 u8 sc_rixmap[256]; /* IEEE to h/w rate table ix */
996 u8 sc_protrix; /* protection rate index */
998 u32 rateKbps; /* transfer rate in kbs */
999 u8 ieeerate; /* IEEE rate */
1000 } sc_hwmap[256]; /* h/w rate ix mappings */
1003 struct ieee80211_channel channels[IEEE80211_NUM_BANDS][ATH_CHAN_MAX];
1004 struct ieee80211_supported_band sbands[IEEE80211_NUM_BANDS];
1007 spinlock_t sc_rxflushlock;
1008 spinlock_t sc_rxbuflock;
1009 spinlock_t sc_txbuflock;
1010 spinlock_t sc_resetlock;
1011 spinlock_t node_lock;
1014 struct ath_led radio_led;
1015 struct ath_led assoc_led;
1016 struct ath_led tx_led;
1017 struct ath_led rx_led;
1020 int ath_init(u16 devid, struct ath_softc *sc);
1021 void ath_deinit(struct ath_softc *sc);
1022 int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan);
1023 int ath_suspend(struct ath_softc *sc);
1024 irqreturn_t ath_isr(int irq, void *dev);
1025 int ath_reset(struct ath_softc *sc, bool retry_tx);
1026 int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan);
1028 /*********************/
1029 /* Utility Functions */
1030 /*********************/
1032 void ath_key_reset(struct ath_softc *sc, u16 keyix, int freeslot);
1033 int ath_keyset(struct ath_softc *sc,
1035 struct ath9k_keyval *hk,
1036 const u8 mac[ETH_ALEN]);
1037 int ath_get_hal_qnum(u16 queue, struct ath_softc *sc);
1038 int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc);
1039 void ath_setslottime(struct ath_softc *sc);
1040 void ath_update_txpow(struct ath_softc *sc);
1041 int ath_cabq_update(struct ath_softc *);
1042 void ath_get_currentCountry(struct ath_softc *sc,
1043 struct ath9k_country_entry *ctry);
1044 u64 ath_extend_tsf(struct ath_softc *sc, u32 rstamp);