1 /*
2 * Atheros CARL9170 driver
3 *
4 * Driver specific definitions
5 *
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, see
21 * http://www.gnu.org/licenses/.
22 *
23 * This file incorporates work covered by the following copyright and
24 * permission notice:
25 * Copyright (c) 2007-2008 Atheros Communications, Inc.
26 *
27 * Permission to use, copy, modify, and/or distribute this software for any
28 * purpose with or without fee is hereby granted, provided that the above
29 * copyright notice and this permission notice appear in all copies.
30 *
31 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
32 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
33 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
34 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
35 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
36 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
37 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
38 */
39 #ifndef __CARL9170_H
40 #define __CARL9170_H
41
42 #include <linux/kernel.h>
43 #include <linux/firmware.h>
44 #include <linux/completion.h>
45 #include <linux/spinlock.h>
46 #include <linux/hw_random.h>
47 #include <net/cfg80211.h>
48 #include <net/mac80211.h>
49 #include <linux/usb.h>
50 #ifdef CONFIG_CARL9170_LEDS
51 #include <linux/leds.h>
52 #endif /* CONFIG_CARL9170_LEDS */
53 #ifdef CONFIG_CARL9170_WPC
54 #include <linux/input.h>
55 #endif /* CONFIG_CARL9170_WPC */
56 #include "eeprom.h"
57 #include "wlan.h"
58 #include "hw.h"
59 #include "fwdesc.h"
60 #include "fwcmd.h"
61 #include "../regd.h"
62
63 #ifdef CONFIG_CARL9170_DEBUGFS
64 #include "debug.h"
65 #endif /* CONFIG_CARL9170_DEBUGFS */
66
67 #define CARL9170FW_NAME "carl9170-1.fw"
68
69 #define PAYLOAD_MAX (CARL9170_MAX_CMD_LEN / 4 - 1)
70
71 static const u8 ar9170_qmap[__AR9170_NUM_TXQ] = { 3, 2, 1, 0 };
72
73 enum carl9170_rf_init_mode {
74 CARL9170_RFI_NONE,
75 CARL9170_RFI_WARM,
76 CARL9170_RFI_COLD,
77 };
78
79 #define CARL9170_MAX_RX_BUFFER_SIZE 8192
80
81 enum carl9170_device_state {
82 CARL9170_UNKNOWN_STATE,
83 CARL9170_STOPPED,
84 CARL9170_IDLE,
85 CARL9170_STARTED,
86 };
87
88 #define CARL9170_NUM_TID 16
89 #define WME_BA_BMP_SIZE 64
90 #define CARL9170_TX_USER_RATE_TRIES 3
91
92 #define WME_AC_BE 2
93 #define WME_AC_BK 3
94 #define WME_AC_VI 1
95 #define WME_AC_VO 0
96
97 #define TID_TO_WME_AC(_tid) \
98 ((((_tid) == 0) || ((_tid) == 3)) ? WME_AC_BE : \
99 (((_tid) == 1) || ((_tid) == 2)) ? WME_AC_BK : \
100 (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI : \
101 WME_AC_VO)
102
103 #define SEQ_DIFF(_start, _seq) \
104 (((_start) - (_seq)) & 0x0fff)
105 #define SEQ_PREV(_seq) \
106 (((_seq) - 1) & 0x0fff)
107 #define SEQ_NEXT(_seq) \
108 (((_seq) + 1) & 0x0fff)
109 #define BAW_WITHIN(_start, _bawsz, _seqno) \
110 ((((_seqno) - (_start)) & 0xfff) < (_bawsz))
111
112 enum carl9170_tid_state {
113 CARL9170_TID_STATE_INVALID,
114 CARL9170_TID_STATE_KILLED,
115 CARL9170_TID_STATE_SHUTDOWN,
116 CARL9170_TID_STATE_SUSPEND,
117 CARL9170_TID_STATE_PROGRESS,
118 CARL9170_TID_STATE_IDLE,
119 CARL9170_TID_STATE_XMIT,
120 };
121
122 #define CARL9170_BAW_BITS (2 * WME_BA_BMP_SIZE)
123 #define CARL9170_BAW_SIZE (BITS_TO_LONGS(CARL9170_BAW_BITS))
124 #define CARL9170_BAW_LEN (DIV_ROUND_UP(CARL9170_BAW_BITS, BITS_PER_BYTE))
125
126 struct carl9170_sta_tid {
127 /* must be the first entry! */
128 struct list_head list;
129
130 /* temporary list for RCU unlink procedure */
131 struct list_head tmp_list;
132
133 /* lock for the following data structures */
134 spinlock_t lock;
135
136 unsigned int counter;
137 enum carl9170_tid_state state;
138 u8 tid; /* TID number ( 0 - 15 ) */
139 u16 max; /* max. AMPDU size */
140
141 u16 snx; /* awaiting _next_ frame */
142 u16 hsn; /* highest _queued_ sequence */
143 u16 bsn; /* base of the tx/agg bitmap */
144 unsigned long bitmap[CARL9170_BAW_SIZE];
145
146 /* Preaggregation reorder queue */
147 struct sk_buff_head queue;
148 };
149
150 #define CARL9170_QUEUE_TIMEOUT 256
151 #define CARL9170_BUMP_QUEUE 1000
152 #define CARL9170_TX_TIMEOUT 2500
153 #define CARL9170_JANITOR_DELAY 128
154 #define CARL9170_QUEUE_STUCK_TIMEOUT 5500
155 #define CARL9170_STAT_WORK 30000
156
157 #define CARL9170_NUM_TX_AGG_MAX 30
158
159 /*
160 * Tradeoff between stability/latency and speed.
161 *
162 * AR9170_TXQ_DEPTH is devised by dividing the amount of available
163 * tx buffers with the size of a full ethernet frame + overhead.
164 *
165 * Naturally: The higher the limit, the faster the device CAN send.
166 * However, even a slight over-commitment at the wrong time and the
167 * hardware is doomed to send all already-queued frames at suboptimal
168 * rates. This in turn leads to an enormous amount of unsuccessful
169 * retries => Latency goes up, whereas the throughput goes down. CRASH!
170 */
171 #define CARL9170_NUM_TX_LIMIT_HARD ((AR9170_TXQ_DEPTH * 3) / 2)
172 #define CARL9170_NUM_TX_LIMIT_SOFT (AR9170_TXQ_DEPTH)
173
174 struct carl9170_tx_queue_stats {
175 unsigned int count;
176 unsigned int limit;
177 unsigned int len;
178 };
179
180 struct carl9170_vif {
181 unsigned int id;
182 struct ieee80211_vif __rcu *vif;
183 };
184
185 struct carl9170_vif_info {
186 struct list_head list;
187 bool active;
188 unsigned int id;
189 struct sk_buff *beacon;
190 bool enable_beacon;
191 };
192
193 #define AR9170_NUM_RX_URBS 16
194 #define AR9170_NUM_RX_URBS_MUL 2
195 #define AR9170_NUM_TX_URBS 8
196 #define AR9170_NUM_RX_URBS_POOL (AR9170_NUM_RX_URBS_MUL * AR9170_NUM_RX_URBS)
197
198 enum carl9170_device_features {
199 CARL9170_WPS_BUTTON = BIT(0),
200 CARL9170_ONE_LED = BIT(1),
201 };
202
203 #ifdef CONFIG_CARL9170_LEDS
204 struct ar9170;
205
206 struct carl9170_led {
207 struct ar9170 *ar;
208 struct led_classdev l;
209 char name[32];
210 unsigned int toggled;
211 bool last_state;
212 bool registered;
213 };
214 #endif /* CONFIG_CARL9170_LEDS */
215
216 enum carl9170_restart_reasons {
217 CARL9170_RR_NO_REASON = 0,
218 CARL9170_RR_FATAL_FIRMWARE_ERROR,
219 CARL9170_RR_TOO_MANY_FIRMWARE_ERRORS,
220 CARL9170_RR_WATCHDOG,
221 CARL9170_RR_STUCK_TX,
222 CARL9170_RR_UNRESPONSIVE_DEVICE,
223 CARL9170_RR_COMMAND_TIMEOUT,
224 CARL9170_RR_TOO_MANY_PHY_ERRORS,
225 CARL9170_RR_LOST_RSP,
226 CARL9170_RR_INVALID_RSP,
227 CARL9170_RR_USER_REQUEST,
228
229 __CARL9170_RR_LAST,
230 };
231
232 enum carl9170_erp_modes {
233 CARL9170_ERP_INVALID,
234 CARL9170_ERP_AUTO,
235 CARL9170_ERP_MAC80211,
236 CARL9170_ERP_OFF,
237 CARL9170_ERP_CTS,
238 CARL9170_ERP_RTS,
239 __CARL9170_ERP_NUM,
240 };
241
242 struct ar9170 {
243 struct ath_common common;
244 struct ieee80211_hw *hw;
245 struct mutex mutex;
246 enum carl9170_device_state state;
247 spinlock_t state_lock;
248 enum carl9170_restart_reasons last_reason;
249 bool registered;
250
251 /* USB */
252 struct usb_device *udev;
253 struct usb_interface *intf;
254 struct usb_anchor rx_anch;
255 struct usb_anchor rx_work;
256 struct usb_anchor rx_pool;
257 struct usb_anchor tx_wait;
258 struct usb_anchor tx_anch;
259 struct usb_anchor tx_cmd;
260 struct usb_anchor tx_err;
261 struct tasklet_struct usb_tasklet;
262 atomic_t tx_cmd_urbs;
263 atomic_t tx_anch_urbs;
264 atomic_t rx_anch_urbs;
265 atomic_t rx_work_urbs;
266 atomic_t rx_pool_urbs;
267 kernel_ulong_t features;
268
269 /* firmware settings */
270 struct completion fw_load_wait;
271 struct completion fw_boot_wait;
272 struct {
273 const struct carl9170fw_desc_head *desc;
274 const struct firmware *fw;
275 unsigned int offset;
276 unsigned int address;
277 unsigned int cmd_bufs;
278 unsigned int api_version;
279 unsigned int vif_num;
280 unsigned int err_counter;
281 unsigned int bug_counter;
282 u32 beacon_addr;
283 unsigned int beacon_max_len;
284 bool rx_stream;
285 bool tx_stream;
286 bool rx_filter;
287 bool hw_counters;
288 unsigned int mem_blocks;
289 unsigned int mem_block_size;
290 unsigned int rx_size;
291 unsigned int tx_seq_table;
292 } fw;
293
294 /* interface configuration combinations */
295 struct ieee80211_iface_limit if_comb_limits[1];
296 struct ieee80211_iface_combination if_combs[1];
297
298 /* reset / stuck frames/queue detection */
299 struct work_struct restart_work;
300 struct work_struct ping_work;
301 unsigned int restart_counter;
302 unsigned long queue_stop_timeout[__AR9170_NUM_TXQ];
303 unsigned long max_queue_stop_timeout[__AR9170_NUM_TXQ];
304 bool needs_full_reset;
305 atomic_t pending_restarts;
306
307 /* interface mode settings */
308 struct list_head vif_list;
309 unsigned long vif_bitmap;
310 unsigned int vifs;
311 struct carl9170_vif vif_priv[AR9170_MAX_VIRTUAL_MAC];
312
313 /* beaconing */
314 spinlock_t beacon_lock;
315 unsigned int global_pretbtt;
316 unsigned int global_beacon_int;
317 struct carl9170_vif_info __rcu *beacon_iter;
318 unsigned int beacon_enabled;
319
320 /* cryptographic engine */
321 u64 usedkeys;
322 bool rx_software_decryption;
323 bool disable_offload;
324
325 /* filter settings */
326 u64 cur_mc_hash;
327 u32 cur_filter;
328 unsigned int filter_state;
329 unsigned int rx_filter_caps;
330 bool sniffer_enabled;
331
332 /* MAC */
333 enum carl9170_erp_modes erp_mode;
334
335 /* PHY */
336 struct ieee80211_channel *channel;
337 unsigned int num_channels;
338 int noise[4];
339 unsigned int chan_fail;
340 unsigned int total_chan_fail;
341 u8 heavy_clip;
342 u8 ht_settings;
343 struct {
344 u64 active; /* usec */
345 u64 cca; /* usec */
346 u64 tx_time; /* usec */
347 u64 rx_total;
348 u64 rx_overrun;
349 } tally;
350 struct delayed_work stat_work;
351 struct survey_info *survey;
352
353 /* power calibration data */
354 u8 power_5G_leg[4];
355 u8 power_2G_cck[4];
356 u8 power_2G_ofdm[4];
357 u8 power_5G_ht20[8];
358 u8 power_5G_ht40[8];
359 u8 power_2G_ht20[8];
360 u8 power_2G_ht40[8];
361
362 #ifdef CONFIG_CARL9170_LEDS
363 /* LED */
364 struct delayed_work led_work;
365 struct carl9170_led leds[AR9170_NUM_LEDS];
366 #endif /* CONFIG_CARL9170_LEDS */
367
368 /* qos queue settings */
369 spinlock_t tx_stats_lock;
370 struct carl9170_tx_queue_stats tx_stats[__AR9170_NUM_TXQ];
371 struct ieee80211_tx_queue_params edcf[5];
372 struct completion tx_flush;
373
374 /* CMD */
375 int cmd_seq;
376 int readlen;
377 u8 *readbuf;
378 spinlock_t cmd_lock;
379 struct completion cmd_wait;
380 union {
381 __le32 cmd_buf[PAYLOAD_MAX + 1];
382 struct carl9170_cmd cmd;
383 struct carl9170_rsp rsp;
384 };
385
386 /* statistics */
387 unsigned int tx_dropped;
388 unsigned int tx_ack_failures;
389 unsigned int tx_fcs_errors;
390 unsigned int rx_dropped;
391
392 /* EEPROM */
393 struct ar9170_eeprom eeprom;
394
395 /* tx queuing */
396 struct sk_buff_head tx_pending[__AR9170_NUM_TXQ];
397 struct sk_buff_head tx_status[__AR9170_NUM_TXQ];
398 struct delayed_work tx_janitor;
399 unsigned long tx_janitor_last_run;
400 bool tx_schedule;
401
402 /* tx ampdu */
403 struct work_struct ampdu_work;
404 spinlock_t tx_ampdu_list_lock;
405 struct carl9170_sta_tid __rcu *tx_ampdu_iter;
406 struct list_head tx_ampdu_list;
407 atomic_t tx_ampdu_upload;
408 atomic_t tx_ampdu_scheduler;
409 atomic_t tx_total_pending;
410 atomic_t tx_total_queued;
411 unsigned int tx_ampdu_list_len;
412 int current_density;
413 int current_factor;
414 bool tx_ampdu_schedule;
415
416 /* internal memory management */
417 spinlock_t mem_lock;
418 unsigned long *mem_bitmap;
419 atomic_t mem_free_blocks;
420 atomic_t mem_allocs;
421
422 /* rxstream mpdu merge */
423 struct ar9170_rx_head rx_plcp;
424 bool rx_has_plcp;
425 struct sk_buff *rx_failover;
426 int rx_failover_missing;
427
428 #ifdef CONFIG_CARL9170_WPC
429 struct {
430 bool pbc_state;
431 struct input_dev *pbc;
432 char name[32];
433 char phys[32];
434 } wps;
435 #endif /* CONFIG_CARL9170_WPC */
436
437 #ifdef CONFIG_CARL9170_DEBUGFS
438 struct carl9170_debug debug;
439 struct dentry *debug_dir;
440 #endif /* CONFIG_CARL9170_DEBUGFS */
441
442 /* PSM */
443 struct work_struct ps_work;
444 struct {
445 unsigned int dtim_counter;
446 unsigned long last_beacon;
447 unsigned long last_action;
448 unsigned long last_slept;
449 unsigned int sleep_ms;
450 unsigned int off_override;
451 bool state;
452 } ps;
453
454 #ifdef CONFIG_CARL9170_HWRNG
455 # define CARL9170_HWRNG_CACHE_SIZE CARL9170_MAX_CMD_PAYLOAD_LEN
456 struct {
457 struct hwrng rng;
458 bool initialized;
459 char name[30 + 1];
460 u16 cache[CARL9170_HWRNG_CACHE_SIZE / sizeof(u16)];
461 unsigned int cache_idx;
462 } rng;
463 #endif /* CONFIG_CARL9170_HWRNG */
464 };
465
466 enum carl9170_ps_off_override_reasons {
467 PS_OFF_VIF = BIT(0),
468 PS_OFF_BCN = BIT(1),
469 };
470
471 struct carl9170_ba_stats {
472 u8 ampdu_len;
473 u8 ampdu_ack_len;
474 bool clear;
475 bool req;
476 };
477
478 struct carl9170_sta_info {
479 bool ht_sta;
480 bool sleeping;
481 atomic_t pending_frames;
482 unsigned int ampdu_max_len;
483 struct carl9170_sta_tid __rcu *agg[CARL9170_NUM_TID];
484 struct carl9170_ba_stats stats[CARL9170_NUM_TID];
485 };
486
487 struct carl9170_tx_info {
488 unsigned long timeout;
489 struct ar9170 *ar;
490 struct kref ref;
491 };
492
493 #define CHK_DEV_STATE(a, s) (((struct ar9170 *)a)->state >= (s))
494 #define IS_INITIALIZED(a) (CHK_DEV_STATE(a, CARL9170_STOPPED))
495 #define IS_ACCEPTING_CMD(a) (CHK_DEV_STATE(a, CARL9170_IDLE))
496 #define IS_STARTED(a) (CHK_DEV_STATE(a, CARL9170_STARTED))
497
__carl9170_set_state(struct ar9170 * ar,enum carl9170_device_state newstate)498 static inline void __carl9170_set_state(struct ar9170 *ar,
499 enum carl9170_device_state newstate)
500 {
501 ar->state = newstate;
502 }
503
carl9170_set_state(struct ar9170 * ar,enum carl9170_device_state newstate)504 static inline void carl9170_set_state(struct ar9170 *ar,
505 enum carl9170_device_state newstate)
506 {
507 unsigned long flags;
508
509 spin_lock_irqsave(&ar->state_lock, flags);
510 __carl9170_set_state(ar, newstate);
511 spin_unlock_irqrestore(&ar->state_lock, flags);
512 }
513
carl9170_set_state_when(struct ar9170 * ar,enum carl9170_device_state min,enum carl9170_device_state newstate)514 static inline void carl9170_set_state_when(struct ar9170 *ar,
515 enum carl9170_device_state min, enum carl9170_device_state newstate)
516 {
517 unsigned long flags;
518
519 spin_lock_irqsave(&ar->state_lock, flags);
520 if (CHK_DEV_STATE(ar, min))
521 __carl9170_set_state(ar, newstate);
522 spin_unlock_irqrestore(&ar->state_lock, flags);
523 }
524
525 /* exported interface */
526 void *carl9170_alloc(size_t priv_size);
527 int carl9170_register(struct ar9170 *ar);
528 void carl9170_unregister(struct ar9170 *ar);
529 void carl9170_free(struct ar9170 *ar);
530 void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r);
531 void carl9170_ps_check(struct ar9170 *ar);
532
533 /* USB back-end */
534 int carl9170_usb_open(struct ar9170 *ar);
535 void carl9170_usb_stop(struct ar9170 *ar);
536 void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb);
537 void carl9170_usb_handle_tx_err(struct ar9170 *ar);
538 int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids,
539 u32 plen, void *payload, u32 rlen, void *resp);
540 int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd,
541 const bool free_buf);
542 int carl9170_usb_restart(struct ar9170 *ar);
543 void carl9170_usb_reset(struct ar9170 *ar);
544
545 /* MAC */
546 int carl9170_init_mac(struct ar9170 *ar);
547 int carl9170_set_qos(struct ar9170 *ar);
548 int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hast);
549 int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id,
550 const u8 *mac);
551 int carl9170_set_operating_mode(struct ar9170 *ar);
552 int carl9170_set_beacon_timers(struct ar9170 *ar);
553 int carl9170_set_dyn_sifs_ack(struct ar9170 *ar);
554 int carl9170_set_rts_cts_rate(struct ar9170 *ar);
555 int carl9170_set_ampdu_settings(struct ar9170 *ar);
556 int carl9170_set_slot_time(struct ar9170 *ar);
557 int carl9170_set_mac_rates(struct ar9170 *ar);
558 int carl9170_set_hwretry_limit(struct ar9170 *ar, const u32 max_retry);
559 int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac,
560 const u8 ktype, const u8 keyidx, const u8 *keydata, const int keylen);
561 int carl9170_disable_key(struct ar9170 *ar, const u8 id);
562 int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel);
563
564 /* RX */
565 void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len);
566 void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len);
567
568 /* TX */
569 void carl9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
570 void carl9170_tx_janitor(struct work_struct *work);
571 void carl9170_tx_process_status(struct ar9170 *ar,
572 const struct carl9170_rsp *cmd);
573 void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
574 const bool success);
575 void carl9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb);
576 void carl9170_tx_drop(struct ar9170 *ar, struct sk_buff *skb);
577 void carl9170_tx_scheduler(struct ar9170 *ar);
578 void carl9170_tx_get_skb(struct sk_buff *skb);
579 int carl9170_tx_put_skb(struct sk_buff *skb);
580 int carl9170_update_beacon(struct ar9170 *ar, const bool submit);
581
582 /* LEDs */
583 #ifdef CONFIG_CARL9170_LEDS
584 int carl9170_led_register(struct ar9170 *ar);
585 void carl9170_led_unregister(struct ar9170 *ar);
586 #endif /* CONFIG_CARL9170_LEDS */
587 int carl9170_led_init(struct ar9170 *ar);
588 int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state);
589
590 /* PHY / RF */
591 int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
592 enum nl80211_channel_type bw, enum carl9170_rf_init_mode rfi);
593 int carl9170_get_noisefloor(struct ar9170 *ar);
594
595 /* FW */
596 int carl9170_parse_firmware(struct ar9170 *ar);
597
598 extern struct ieee80211_rate __carl9170_ratetable[];
599 extern int modparam_noht;
600
carl9170_get_priv(struct carl9170_vif * carl_vif)601 static inline struct ar9170 *carl9170_get_priv(struct carl9170_vif *carl_vif)
602 {
603 return container_of(carl_vif, struct ar9170,
604 vif_priv[carl_vif->id]);
605 }
606
carl9170_get_hdr(struct sk_buff * skb)607 static inline struct ieee80211_hdr *carl9170_get_hdr(struct sk_buff *skb)
608 {
609 return (void *)((struct _carl9170_tx_superframe *)
610 skb->data)->frame_data;
611 }
612
get_seq_h(struct ieee80211_hdr * hdr)613 static inline u16 get_seq_h(struct ieee80211_hdr *hdr)
614 {
615 return le16_to_cpu(hdr->seq_ctrl) >> 4;
616 }
617
carl9170_get_seq(struct sk_buff * skb)618 static inline u16 carl9170_get_seq(struct sk_buff *skb)
619 {
620 return get_seq_h(carl9170_get_hdr(skb));
621 }
622
get_tid_h(struct ieee80211_hdr * hdr)623 static inline u16 get_tid_h(struct ieee80211_hdr *hdr)
624 {
625 return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK;
626 }
627
carl9170_get_tid(struct sk_buff * skb)628 static inline u16 carl9170_get_tid(struct sk_buff *skb)
629 {
630 return get_tid_h(carl9170_get_hdr(skb));
631 }
632
633 static inline struct ieee80211_vif *
carl9170_get_vif(struct carl9170_vif_info * priv)634 carl9170_get_vif(struct carl9170_vif_info *priv)
635 {
636 return container_of((void *)priv, struct ieee80211_vif, drv_priv);
637 }
638
639 /* Protected by ar->mutex or RCU */
carl9170_get_main_vif(struct ar9170 * ar)640 static inline struct ieee80211_vif *carl9170_get_main_vif(struct ar9170 *ar)
641 {
642 struct carl9170_vif_info *cvif;
643
644 list_for_each_entry_rcu(cvif, &ar->vif_list, list) {
645 if (cvif->active)
646 return carl9170_get_vif(cvif);
647 }
648
649 return NULL;
650 }
651
is_main_vif(struct ar9170 * ar,struct ieee80211_vif * vif)652 static inline bool is_main_vif(struct ar9170 *ar, struct ieee80211_vif *vif)
653 {
654 bool ret;
655
656 rcu_read_lock();
657 ret = (carl9170_get_main_vif(ar) == vif);
658 rcu_read_unlock();
659 return ret;
660 }
661
662 #endif /* __CARL9170_H */
663