Loading...
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 <net/cfg80211.h>
47#include <net/mac80211.h>
48#include <linux/usb.h>
49#ifdef CONFIG_CARL9170_LEDS
50#include <linux/leds.h>
51#endif /* CONFIG_CARL9170_LEDS */
52#ifdef CONFIG_CARL9170_WPC
53#include <linux/input.h>
54#endif /* CONFIG_CARL9170_WPC */
55#include "eeprom.h"
56#include "wlan.h"
57#include "hw.h"
58#include "fwdesc.h"
59#include "fwcmd.h"
60#include "../regd.h"
61
62#ifdef CONFIG_CARL9170_DEBUGFS
63#include "debug.h"
64#endif /* CONFIG_CARL9170_DEBUGFS */
65
66#define CARL9170FW_NAME "carl9170-1.fw"
67
68#define PAYLOAD_MAX (CARL9170_MAX_CMD_LEN / 4 - 1)
69
70static const u8 ar9170_qmap[__AR9170_NUM_TXQ] = { 3, 2, 1, 0 };
71
72enum carl9170_rf_init_mode {
73 CARL9170_RFI_NONE,
74 CARL9170_RFI_WARM,
75 CARL9170_RFI_COLD,
76};
77
78#define CARL9170_MAX_RX_BUFFER_SIZE 8192
79
80enum carl9170_device_state {
81 CARL9170_UNKNOWN_STATE,
82 CARL9170_STOPPED,
83 CARL9170_IDLE,
84 CARL9170_STARTED,
85};
86
87#define CARL9170_NUM_TID 16
88#define WME_BA_BMP_SIZE 64
89#define CARL9170_TX_USER_RATE_TRIES 3
90
91#define WME_AC_BE 2
92#define WME_AC_BK 3
93#define WME_AC_VI 1
94#define WME_AC_VO 0
95
96#define TID_TO_WME_AC(_tid) \
97 ((((_tid) == 0) || ((_tid) == 3)) ? WME_AC_BE : \
98 (((_tid) == 1) || ((_tid) == 2)) ? WME_AC_BK : \
99 (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI : \
100 WME_AC_VO)
101
102#define SEQ_DIFF(_start, _seq) \
103 (((_start) - (_seq)) & 0x0fff)
104#define SEQ_PREV(_seq) \
105 (((_seq) - 1) & 0x0fff)
106#define SEQ_NEXT(_seq) \
107 (((_seq) + 1) & 0x0fff)
108#define BAW_WITHIN(_start, _bawsz, _seqno) \
109 ((((_seqno) - (_start)) & 0xfff) < (_bawsz))
110
111enum carl9170_tid_state {
112 CARL9170_TID_STATE_INVALID,
113 CARL9170_TID_STATE_KILLED,
114 CARL9170_TID_STATE_SHUTDOWN,
115 CARL9170_TID_STATE_SUSPEND,
116 CARL9170_TID_STATE_PROGRESS,
117 CARL9170_TID_STATE_IDLE,
118 CARL9170_TID_STATE_XMIT,
119};
120
121#define CARL9170_BAW_BITS (2 * WME_BA_BMP_SIZE)
122#define CARL9170_BAW_SIZE (BITS_TO_LONGS(CARL9170_BAW_BITS))
123#define CARL9170_BAW_LEN (DIV_ROUND_UP(CARL9170_BAW_BITS, BITS_PER_BYTE))
124
125struct carl9170_sta_tid {
126 /* must be the first entry! */
127 struct list_head list;
128
129 /* temporary list for RCU unlink procedure */
130 struct list_head tmp_list;
131
132 /* lock for the following data structures */
133 spinlock_t lock;
134
135 unsigned int counter;
136 enum carl9170_tid_state state;
137 u8 tid; /* TID number ( 0 - 15 ) */
138 u16 max; /* max. AMPDU size */
139
140 u16 snx; /* awaiting _next_ frame */
141 u16 hsn; /* highest _queued_ sequence */
142 u16 bsn; /* base of the tx/agg bitmap */
143 unsigned long bitmap[CARL9170_BAW_SIZE];
144
145 /* Preaggregation reorder queue */
146 struct sk_buff_head queue;
147};
148
149#define CARL9170_QUEUE_TIMEOUT 256
150#define CARL9170_BUMP_QUEUE 1000
151#define CARL9170_TX_TIMEOUT 2500
152#define CARL9170_JANITOR_DELAY 128
153#define CARL9170_QUEUE_STUCK_TIMEOUT 5500
154
155#define CARL9170_NUM_TX_AGG_MAX 30
156
157/*
158 * Tradeoff between stability/latency and speed.
159 *
160 * AR9170_TXQ_DEPTH is devised by dividing the amount of available
161 * tx buffers with the size of a full ethernet frame + overhead.
162 *
163 * Naturally: The higher the limit, the faster the device CAN send.
164 * However, even a slight over-commitment at the wrong time and the
165 * hardware is doomed to send all already-queued frames at suboptimal
166 * rates. This in turn leads to an enormous amount of unsuccessful
167 * retries => Latency goes up, whereas the throughput goes down. CRASH!
168 */
169#define CARL9170_NUM_TX_LIMIT_HARD ((AR9170_TXQ_DEPTH * 3) / 2)
170#define CARL9170_NUM_TX_LIMIT_SOFT (AR9170_TXQ_DEPTH)
171
172struct carl9170_tx_queue_stats {
173 unsigned int count;
174 unsigned int limit;
175 unsigned int len;
176};
177
178struct carl9170_vif {
179 unsigned int id;
180 struct ieee80211_vif __rcu *vif;
181};
182
183struct carl9170_vif_info {
184 struct list_head list;
185 bool active;
186 unsigned int id;
187 struct sk_buff *beacon;
188 bool enable_beacon;
189};
190
191#define AR9170_NUM_RX_URBS 16
192#define AR9170_NUM_RX_URBS_MUL 2
193#define AR9170_NUM_TX_URBS 8
194#define AR9170_NUM_RX_URBS_POOL (AR9170_NUM_RX_URBS_MUL * AR9170_NUM_RX_URBS)
195
196enum carl9170_device_features {
197 CARL9170_WPS_BUTTON = BIT(0),
198 CARL9170_ONE_LED = BIT(1),
199};
200
201#ifdef CONFIG_CARL9170_LEDS
202struct ar9170;
203
204struct carl9170_led {
205 struct ar9170 *ar;
206 struct led_classdev l;
207 char name[32];
208 unsigned int toggled;
209 bool last_state;
210 bool registered;
211};
212#endif /* CONFIG_CARL9170_LEDS */
213
214enum carl9170_restart_reasons {
215 CARL9170_RR_NO_REASON = 0,
216 CARL9170_RR_FATAL_FIRMWARE_ERROR,
217 CARL9170_RR_TOO_MANY_FIRMWARE_ERRORS,
218 CARL9170_RR_WATCHDOG,
219 CARL9170_RR_STUCK_TX,
220 CARL9170_RR_UNRESPONSIVE_DEVICE,
221 CARL9170_RR_COMMAND_TIMEOUT,
222 CARL9170_RR_TOO_MANY_PHY_ERRORS,
223 CARL9170_RR_LOST_RSP,
224 CARL9170_RR_INVALID_RSP,
225 CARL9170_RR_USER_REQUEST,
226
227 __CARL9170_RR_LAST,
228};
229
230enum carl9170_erp_modes {
231 CARL9170_ERP_INVALID,
232 CARL9170_ERP_AUTO,
233 CARL9170_ERP_MAC80211,
234 CARL9170_ERP_OFF,
235 CARL9170_ERP_CTS,
236 CARL9170_ERP_RTS,
237 __CARL9170_ERP_NUM,
238};
239
240struct ar9170 {
241 struct ath_common common;
242 struct ieee80211_hw *hw;
243 struct mutex mutex;
244 enum carl9170_device_state state;
245 spinlock_t state_lock;
246 enum carl9170_restart_reasons last_reason;
247 bool registered;
248
249 /* USB */
250 struct usb_device *udev;
251 struct usb_interface *intf;
252 struct usb_anchor rx_anch;
253 struct usb_anchor rx_work;
254 struct usb_anchor rx_pool;
255 struct usb_anchor tx_wait;
256 struct usb_anchor tx_anch;
257 struct usb_anchor tx_cmd;
258 struct usb_anchor tx_err;
259 struct tasklet_struct usb_tasklet;
260 atomic_t tx_cmd_urbs;
261 atomic_t tx_anch_urbs;
262 atomic_t rx_anch_urbs;
263 atomic_t rx_work_urbs;
264 atomic_t rx_pool_urbs;
265 kernel_ulong_t features;
266
267 /* firmware settings */
268 struct completion fw_load_wait;
269 struct completion fw_boot_wait;
270 struct {
271 const struct carl9170fw_desc_head *desc;
272 const struct firmware *fw;
273 unsigned int offset;
274 unsigned int address;
275 unsigned int cmd_bufs;
276 unsigned int api_version;
277 unsigned int vif_num;
278 unsigned int err_counter;
279 unsigned int bug_counter;
280 u32 beacon_addr;
281 unsigned int beacon_max_len;
282 bool rx_stream;
283 bool tx_stream;
284 bool rx_filter;
285 unsigned int mem_blocks;
286 unsigned int mem_block_size;
287 unsigned int rx_size;
288 unsigned int tx_seq_table;
289 } fw;
290
291 /* interface configuration combinations */
292 struct ieee80211_iface_limit if_comb_limits[1];
293 struct ieee80211_iface_combination if_combs[1];
294
295 /* reset / stuck frames/queue detection */
296 struct work_struct restart_work;
297 struct work_struct ping_work;
298 unsigned int restart_counter;
299 unsigned long queue_stop_timeout[__AR9170_NUM_TXQ];
300 unsigned long max_queue_stop_timeout[__AR9170_NUM_TXQ];
301 bool needs_full_reset;
302 atomic_t pending_restarts;
303
304 /* interface mode settings */
305 struct list_head vif_list;
306 unsigned long vif_bitmap;
307 unsigned int vifs;
308 struct carl9170_vif vif_priv[AR9170_MAX_VIRTUAL_MAC];
309
310 /* beaconing */
311 spinlock_t beacon_lock;
312 unsigned int global_pretbtt;
313 unsigned int global_beacon_int;
314 struct carl9170_vif_info __rcu *beacon_iter;
315 unsigned int beacon_enabled;
316
317 /* cryptographic engine */
318 u64 usedkeys;
319 bool rx_software_decryption;
320 bool disable_offload;
321
322 /* filter settings */
323 u64 cur_mc_hash;
324 u32 cur_filter;
325 unsigned int filter_state;
326 unsigned int rx_filter_caps;
327 bool sniffer_enabled;
328
329 /* MAC */
330 enum carl9170_erp_modes erp_mode;
331
332 /* PHY */
333 struct ieee80211_channel *channel;
334 int noise[4];
335 unsigned int chan_fail;
336 unsigned int total_chan_fail;
337 u8 heavy_clip;
338 u8 ht_settings;
339
340 /* power calibration data */
341 u8 power_5G_leg[4];
342 u8 power_2G_cck[4];
343 u8 power_2G_ofdm[4];
344 u8 power_5G_ht20[8];
345 u8 power_5G_ht40[8];
346 u8 power_2G_ht20[8];
347 u8 power_2G_ht40[8];
348
349#ifdef CONFIG_CARL9170_LEDS
350 /* LED */
351 struct delayed_work led_work;
352 struct carl9170_led leds[AR9170_NUM_LEDS];
353#endif /* CONFIG_CARL9170_LEDS */
354
355 /* qos queue settings */
356 spinlock_t tx_stats_lock;
357 struct carl9170_tx_queue_stats tx_stats[__AR9170_NUM_TXQ];
358 struct ieee80211_tx_queue_params edcf[5];
359 struct completion tx_flush;
360
361 /* CMD */
362 int cmd_seq;
363 int readlen;
364 u8 *readbuf;
365 spinlock_t cmd_lock;
366 struct completion cmd_wait;
367 union {
368 __le32 cmd_buf[PAYLOAD_MAX + 1];
369 struct carl9170_cmd cmd;
370 struct carl9170_rsp rsp;
371 };
372
373 /* statistics */
374 unsigned int tx_dropped;
375 unsigned int tx_ack_failures;
376 unsigned int tx_fcs_errors;
377 unsigned int rx_dropped;
378
379 /* EEPROM */
380 struct ar9170_eeprom eeprom;
381
382 /* tx queuing */
383 struct sk_buff_head tx_pending[__AR9170_NUM_TXQ];
384 struct sk_buff_head tx_status[__AR9170_NUM_TXQ];
385 struct delayed_work tx_janitor;
386 unsigned long tx_janitor_last_run;
387 bool tx_schedule;
388
389 /* tx ampdu */
390 struct work_struct ampdu_work;
391 spinlock_t tx_ampdu_list_lock;
392 struct carl9170_sta_tid __rcu *tx_ampdu_iter;
393 struct list_head tx_ampdu_list;
394 atomic_t tx_ampdu_upload;
395 atomic_t tx_ampdu_scheduler;
396 atomic_t tx_total_pending;
397 atomic_t tx_total_queued;
398 unsigned int tx_ampdu_list_len;
399 int current_density;
400 int current_factor;
401 bool tx_ampdu_schedule;
402
403 /* internal memory management */
404 spinlock_t mem_lock;
405 unsigned long *mem_bitmap;
406 atomic_t mem_free_blocks;
407 atomic_t mem_allocs;
408
409 /* rxstream mpdu merge */
410 struct ar9170_rx_head rx_plcp;
411 bool rx_has_plcp;
412 struct sk_buff *rx_failover;
413 int rx_failover_missing;
414
415#ifdef CONFIG_CARL9170_WPC
416 struct {
417 bool pbc_state;
418 struct input_dev *pbc;
419 char name[32];
420 char phys[32];
421 } wps;
422#endif /* CONFIG_CARL9170_WPC */
423
424#ifdef CONFIG_CARL9170_DEBUGFS
425 struct carl9170_debug debug;
426 struct dentry *debug_dir;
427#endif /* CONFIG_CARL9170_DEBUGFS */
428
429 /* PSM */
430 struct work_struct ps_work;
431 struct {
432 unsigned int dtim_counter;
433 unsigned long last_beacon;
434 unsigned long last_action;
435 unsigned long last_slept;
436 unsigned int sleep_ms;
437 unsigned int off_override;
438 bool state;
439 } ps;
440};
441
442enum carl9170_ps_off_override_reasons {
443 PS_OFF_VIF = BIT(0),
444 PS_OFF_BCN = BIT(1),
445};
446
447struct carl9170_ba_stats {
448 u8 ampdu_len;
449 u8 ampdu_ack_len;
450 bool clear;
451 bool req;
452};
453
454struct carl9170_sta_info {
455 bool ht_sta;
456 bool sleeping;
457 atomic_t pending_frames;
458 unsigned int ampdu_max_len;
459 struct carl9170_sta_tid __rcu *agg[CARL9170_NUM_TID];
460 struct carl9170_ba_stats stats[CARL9170_NUM_TID];
461};
462
463struct carl9170_tx_info {
464 unsigned long timeout;
465 struct ar9170 *ar;
466 struct kref ref;
467};
468
469#define CHK_DEV_STATE(a, s) (((struct ar9170 *)a)->state >= (s))
470#define IS_INITIALIZED(a) (CHK_DEV_STATE(a, CARL9170_STOPPED))
471#define IS_ACCEPTING_CMD(a) (CHK_DEV_STATE(a, CARL9170_IDLE))
472#define IS_STARTED(a) (CHK_DEV_STATE(a, CARL9170_STARTED))
473
474static inline void __carl9170_set_state(struct ar9170 *ar,
475 enum carl9170_device_state newstate)
476{
477 ar->state = newstate;
478}
479
480static inline void carl9170_set_state(struct ar9170 *ar,
481 enum carl9170_device_state newstate)
482{
483 unsigned long flags;
484
485 spin_lock_irqsave(&ar->state_lock, flags);
486 __carl9170_set_state(ar, newstate);
487 spin_unlock_irqrestore(&ar->state_lock, flags);
488}
489
490static inline void carl9170_set_state_when(struct ar9170 *ar,
491 enum carl9170_device_state min, enum carl9170_device_state newstate)
492{
493 unsigned long flags;
494
495 spin_lock_irqsave(&ar->state_lock, flags);
496 if (CHK_DEV_STATE(ar, min))
497 __carl9170_set_state(ar, newstate);
498 spin_unlock_irqrestore(&ar->state_lock, flags);
499}
500
501/* exported interface */
502void *carl9170_alloc(size_t priv_size);
503int carl9170_register(struct ar9170 *ar);
504void carl9170_unregister(struct ar9170 *ar);
505void carl9170_free(struct ar9170 *ar);
506void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r);
507void carl9170_ps_check(struct ar9170 *ar);
508
509/* USB back-end */
510int carl9170_usb_open(struct ar9170 *ar);
511void carl9170_usb_stop(struct ar9170 *ar);
512void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb);
513void carl9170_usb_handle_tx_err(struct ar9170 *ar);
514int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids,
515 u32 plen, void *payload, u32 rlen, void *resp);
516int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd,
517 const bool free_buf);
518int carl9170_usb_restart(struct ar9170 *ar);
519void carl9170_usb_reset(struct ar9170 *ar);
520
521/* MAC */
522int carl9170_init_mac(struct ar9170 *ar);
523int carl9170_set_qos(struct ar9170 *ar);
524int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hast);
525int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id,
526 const u8 *mac);
527int carl9170_set_operating_mode(struct ar9170 *ar);
528int carl9170_set_beacon_timers(struct ar9170 *ar);
529int carl9170_set_dyn_sifs_ack(struct ar9170 *ar);
530int carl9170_set_rts_cts_rate(struct ar9170 *ar);
531int carl9170_set_ampdu_settings(struct ar9170 *ar);
532int carl9170_set_slot_time(struct ar9170 *ar);
533int carl9170_set_mac_rates(struct ar9170 *ar);
534int carl9170_set_hwretry_limit(struct ar9170 *ar, const u32 max_retry);
535int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac,
536 const u8 ktype, const u8 keyidx, const u8 *keydata, const int keylen);
537int carl9170_disable_key(struct ar9170 *ar, const u8 id);
538
539/* RX */
540void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len);
541void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len);
542
543/* TX */
544void carl9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
545void carl9170_tx_janitor(struct work_struct *work);
546void carl9170_tx_process_status(struct ar9170 *ar,
547 const struct carl9170_rsp *cmd);
548void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
549 const bool success);
550void carl9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb);
551void carl9170_tx_drop(struct ar9170 *ar, struct sk_buff *skb);
552void carl9170_tx_scheduler(struct ar9170 *ar);
553void carl9170_tx_get_skb(struct sk_buff *skb);
554int carl9170_tx_put_skb(struct sk_buff *skb);
555int carl9170_update_beacon(struct ar9170 *ar, const bool submit);
556
557/* LEDs */
558#ifdef CONFIG_CARL9170_LEDS
559int carl9170_led_register(struct ar9170 *ar);
560void carl9170_led_unregister(struct ar9170 *ar);
561#endif /* CONFIG_CARL9170_LEDS */
562int carl9170_led_init(struct ar9170 *ar);
563int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state);
564
565/* PHY / RF */
566int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
567 enum nl80211_channel_type bw, enum carl9170_rf_init_mode rfi);
568int carl9170_get_noisefloor(struct ar9170 *ar);
569
570/* FW */
571int carl9170_parse_firmware(struct ar9170 *ar);
572int carl9170_fw_fix_eeprom(struct ar9170 *ar);
573
574extern struct ieee80211_rate __carl9170_ratetable[];
575extern int modparam_noht;
576
577static inline struct ar9170 *carl9170_get_priv(struct carl9170_vif *carl_vif)
578{
579 return container_of(carl_vif, struct ar9170,
580 vif_priv[carl_vif->id]);
581}
582
583static inline struct ieee80211_hdr *carl9170_get_hdr(struct sk_buff *skb)
584{
585 return (void *)((struct _carl9170_tx_superframe *)
586 skb->data)->frame_data;
587}
588
589static inline u16 get_seq_h(struct ieee80211_hdr *hdr)
590{
591 return le16_to_cpu(hdr->seq_ctrl) >> 4;
592}
593
594static inline u16 carl9170_get_seq(struct sk_buff *skb)
595{
596 return get_seq_h(carl9170_get_hdr(skb));
597}
598
599static inline u16 get_tid_h(struct ieee80211_hdr *hdr)
600{
601 return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK;
602}
603
604static inline u16 carl9170_get_tid(struct sk_buff *skb)
605{
606 return get_tid_h(carl9170_get_hdr(skb));
607}
608
609static inline struct ieee80211_vif *
610carl9170_get_vif(struct carl9170_vif_info *priv)
611{
612 return container_of((void *)priv, struct ieee80211_vif, drv_priv);
613}
614
615/* Protected by ar->mutex or RCU */
616static inline struct ieee80211_vif *carl9170_get_main_vif(struct ar9170 *ar)
617{
618 struct carl9170_vif_info *cvif;
619
620 list_for_each_entry_rcu(cvif, &ar->vif_list, list) {
621 if (cvif->active)
622 return carl9170_get_vif(cvif);
623 }
624
625 return NULL;
626}
627
628static inline bool is_main_vif(struct ar9170 *ar, struct ieee80211_vif *vif)
629{
630 bool ret;
631
632 rcu_read_lock();
633 ret = (carl9170_get_main_vif(ar) == vif);
634 rcu_read_unlock();
635 return ret;
636}
637
638#endif /* __CARL9170_H */
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
71static const u8 ar9170_qmap[__AR9170_NUM_TXQ] = { 3, 2, 1, 0 };
72
73enum 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
81enum 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
112enum 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
126struct 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
174struct carl9170_tx_queue_stats {
175 unsigned int count;
176 unsigned int limit;
177 unsigned int len;
178};
179
180struct carl9170_vif {
181 unsigned int id;
182 struct ieee80211_vif __rcu *vif;
183};
184
185struct 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
198enum carl9170_device_features {
199 CARL9170_WPS_BUTTON = BIT(0),
200 CARL9170_ONE_LED = BIT(1),
201};
202
203#ifdef CONFIG_CARL9170_LEDS
204struct ar9170;
205
206struct 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
216enum 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
232enum 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
242struct 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
466enum carl9170_ps_off_override_reasons {
467 PS_OFF_VIF = BIT(0),
468 PS_OFF_BCN = BIT(1),
469};
470
471struct carl9170_ba_stats {
472 u8 ampdu_len;
473 u8 ampdu_ack_len;
474 bool clear;
475 bool req;
476};
477
478struct 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
487struct 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
498static inline void __carl9170_set_state(struct ar9170 *ar,
499 enum carl9170_device_state newstate)
500{
501 ar->state = newstate;
502}
503
504static 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
514static 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 */
526void *carl9170_alloc(size_t priv_size);
527int carl9170_register(struct ar9170 *ar);
528void carl9170_unregister(struct ar9170 *ar);
529void carl9170_free(struct ar9170 *ar);
530void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r);
531void carl9170_ps_check(struct ar9170 *ar);
532
533/* USB back-end */
534int carl9170_usb_open(struct ar9170 *ar);
535void carl9170_usb_stop(struct ar9170 *ar);
536void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb);
537void carl9170_usb_handle_tx_err(struct ar9170 *ar);
538int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids,
539 u32 plen, void *payload, u32 rlen, void *resp);
540int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd,
541 const bool free_buf);
542int carl9170_usb_restart(struct ar9170 *ar);
543void carl9170_usb_reset(struct ar9170 *ar);
544
545/* MAC */
546int carl9170_init_mac(struct ar9170 *ar);
547int carl9170_set_qos(struct ar9170 *ar);
548int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hast);
549int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id,
550 const u8 *mac);
551int carl9170_set_operating_mode(struct ar9170 *ar);
552int carl9170_set_beacon_timers(struct ar9170 *ar);
553int carl9170_set_dyn_sifs_ack(struct ar9170 *ar);
554int carl9170_set_rts_cts_rate(struct ar9170 *ar);
555int carl9170_set_ampdu_settings(struct ar9170 *ar);
556int carl9170_set_slot_time(struct ar9170 *ar);
557int carl9170_set_mac_rates(struct ar9170 *ar);
558int carl9170_set_hwretry_limit(struct ar9170 *ar, const u32 max_retry);
559int 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);
561int carl9170_disable_key(struct ar9170 *ar, const u8 id);
562int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel);
563
564/* RX */
565void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len);
566void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len);
567
568/* TX */
569void carl9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
570void carl9170_tx_janitor(struct work_struct *work);
571void carl9170_tx_process_status(struct ar9170 *ar,
572 const struct carl9170_rsp *cmd);
573void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
574 const bool success);
575void carl9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb);
576void carl9170_tx_drop(struct ar9170 *ar, struct sk_buff *skb);
577void carl9170_tx_scheduler(struct ar9170 *ar);
578void carl9170_tx_get_skb(struct sk_buff *skb);
579int carl9170_tx_put_skb(struct sk_buff *skb);
580int carl9170_update_beacon(struct ar9170 *ar, const bool submit);
581
582/* LEDs */
583#ifdef CONFIG_CARL9170_LEDS
584int carl9170_led_register(struct ar9170 *ar);
585void carl9170_led_unregister(struct ar9170 *ar);
586#endif /* CONFIG_CARL9170_LEDS */
587int carl9170_led_init(struct ar9170 *ar);
588int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state);
589
590/* PHY / RF */
591int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
592 enum nl80211_channel_type bw, enum carl9170_rf_init_mode rfi);
593int carl9170_get_noisefloor(struct ar9170 *ar);
594
595/* FW */
596int carl9170_parse_firmware(struct ar9170 *ar);
597
598extern struct ieee80211_rate __carl9170_ratetable[];
599extern int modparam_noht;
600
601static 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
607static 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
613static inline u16 get_seq_h(struct ieee80211_hdr *hdr)
614{
615 return le16_to_cpu(hdr->seq_ctrl) >> 4;
616}
617
618static inline u16 carl9170_get_seq(struct sk_buff *skb)
619{
620 return get_seq_h(carl9170_get_hdr(skb));
621}
622
623static 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
628static inline u16 carl9170_get_tid(struct sk_buff *skb)
629{
630 return get_tid_h(carl9170_get_hdr(skb));
631}
632
633static inline struct ieee80211_vif *
634carl9170_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 */
640static 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
652static 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 */