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e9348cdd CL |
1 | /* |
2 | * Atheros AR9170 driver | |
3 | * | |
4 | * mac80211 interaction code | |
5 | * | |
6 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> | |
7 | * Copyright 2009, Christian Lamparter <chunkeey@web.de> | |
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 | ||
e9348cdd | 40 | #include <linux/init.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
e9348cdd CL |
42 | #include <linux/module.h> |
43 | #include <linux/etherdevice.h> | |
44 | #include <net/mac80211.h> | |
45 | #include "ar9170.h" | |
46 | #include "hw.h" | |
47 | #include "cmd.h" | |
48 | ||
49 | static int modparam_nohwcrypt; | |
50 | module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); | |
51 | MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); | |
e9348cdd | 52 | |
acbadf01 CL |
53 | static int modparam_ht; |
54 | module_param_named(ht, modparam_ht, bool, S_IRUGO); | |
55 | MODULE_PARM_DESC(ht, "enable MPDU aggregation."); | |
56 | ||
e9348cdd CL |
57 | #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \ |
58 | .bitrate = (_bitrate), \ | |
59 | .flags = (_flags), \ | |
60 | .hw_value = (_hw_rate) | (_txpidx) << 4, \ | |
61 | } | |
62 | ||
63 | static struct ieee80211_rate __ar9170_ratetable[] = { | |
64 | RATE(10, 0, 0, 0), | |
65 | RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE), | |
66 | RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE), | |
67 | RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE), | |
68 | RATE(60, 0xb, 0, 0), | |
69 | RATE(90, 0xf, 0, 0), | |
70 | RATE(120, 0xa, 0, 0), | |
71 | RATE(180, 0xe, 0, 0), | |
72 | RATE(240, 0x9, 0, 0), | |
73 | RATE(360, 0xd, 1, 0), | |
74 | RATE(480, 0x8, 2, 0), | |
75 | RATE(540, 0xc, 3, 0), | |
76 | }; | |
77 | #undef RATE | |
78 | ||
79 | #define ar9170_g_ratetable (__ar9170_ratetable + 0) | |
80 | #define ar9170_g_ratetable_size 12 | |
81 | #define ar9170_a_ratetable (__ar9170_ratetable + 4) | |
82 | #define ar9170_a_ratetable_size 8 | |
83 | ||
84 | /* | |
85 | * NB: The hw_value is used as an index into the ar9170_phy_freq_params | |
86 | * array in phy.c so that we don't have to do frequency lookups! | |
87 | */ | |
88 | #define CHAN(_freq, _idx) { \ | |
89 | .center_freq = (_freq), \ | |
90 | .hw_value = (_idx), \ | |
91 | .max_power = 18, /* XXX */ \ | |
92 | } | |
93 | ||
94 | static struct ieee80211_channel ar9170_2ghz_chantable[] = { | |
95 | CHAN(2412, 0), | |
96 | CHAN(2417, 1), | |
97 | CHAN(2422, 2), | |
98 | CHAN(2427, 3), | |
99 | CHAN(2432, 4), | |
100 | CHAN(2437, 5), | |
101 | CHAN(2442, 6), | |
102 | CHAN(2447, 7), | |
103 | CHAN(2452, 8), | |
104 | CHAN(2457, 9), | |
105 | CHAN(2462, 10), | |
106 | CHAN(2467, 11), | |
107 | CHAN(2472, 12), | |
108 | CHAN(2484, 13), | |
109 | }; | |
110 | ||
111 | static struct ieee80211_channel ar9170_5ghz_chantable[] = { | |
112 | CHAN(4920, 14), | |
113 | CHAN(4940, 15), | |
114 | CHAN(4960, 16), | |
115 | CHAN(4980, 17), | |
116 | CHAN(5040, 18), | |
117 | CHAN(5060, 19), | |
118 | CHAN(5080, 20), | |
119 | CHAN(5180, 21), | |
120 | CHAN(5200, 22), | |
121 | CHAN(5220, 23), | |
122 | CHAN(5240, 24), | |
123 | CHAN(5260, 25), | |
124 | CHAN(5280, 26), | |
125 | CHAN(5300, 27), | |
126 | CHAN(5320, 28), | |
127 | CHAN(5500, 29), | |
128 | CHAN(5520, 30), | |
129 | CHAN(5540, 31), | |
130 | CHAN(5560, 32), | |
131 | CHAN(5580, 33), | |
132 | CHAN(5600, 34), | |
133 | CHAN(5620, 35), | |
134 | CHAN(5640, 36), | |
135 | CHAN(5660, 37), | |
136 | CHAN(5680, 38), | |
137 | CHAN(5700, 39), | |
138 | CHAN(5745, 40), | |
139 | CHAN(5765, 41), | |
140 | CHAN(5785, 42), | |
141 | CHAN(5805, 43), | |
142 | CHAN(5825, 44), | |
143 | CHAN(5170, 45), | |
144 | CHAN(5190, 46), | |
145 | CHAN(5210, 47), | |
146 | CHAN(5230, 48), | |
147 | }; | |
148 | #undef CHAN | |
149 | ||
9e52b062 JB |
150 | #define AR9170_HT_CAP \ |
151 | { \ | |
152 | .ht_supported = true, \ | |
153 | .cap = IEEE80211_HT_CAP_MAX_AMSDU | \ | |
9e52b062 JB |
154 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \ |
155 | IEEE80211_HT_CAP_SGI_40 | \ | |
acbadf01 | 156 | IEEE80211_HT_CAP_GRN_FLD | \ |
9e52b062 JB |
157 | IEEE80211_HT_CAP_DSSSCCK40 | \ |
158 | IEEE80211_HT_CAP_SM_PS, \ | |
083c4687 CL |
159 | .ampdu_factor = 3, \ |
160 | .ampdu_density = 6, \ | |
9e52b062 | 161 | .mcs = { \ |
acbadf01 CL |
162 | .rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \ |
163 | .rx_highest = cpu_to_le16(300), \ | |
164 | .tx_params = IEEE80211_HT_MCS_TX_DEFINED, \ | |
9e52b062 JB |
165 | }, \ |
166 | } | |
167 | ||
e9348cdd CL |
168 | static struct ieee80211_supported_band ar9170_band_2GHz = { |
169 | .channels = ar9170_2ghz_chantable, | |
170 | .n_channels = ARRAY_SIZE(ar9170_2ghz_chantable), | |
171 | .bitrates = ar9170_g_ratetable, | |
172 | .n_bitrates = ar9170_g_ratetable_size, | |
9e52b062 JB |
173 | .ht_cap = AR9170_HT_CAP, |
174 | }; | |
175 | ||
176 | static struct ieee80211_supported_band ar9170_band_5GHz = { | |
177 | .channels = ar9170_5ghz_chantable, | |
178 | .n_channels = ARRAY_SIZE(ar9170_5ghz_chantable), | |
179 | .bitrates = ar9170_a_ratetable, | |
180 | .n_bitrates = ar9170_a_ratetable_size, | |
181 | .ht_cap = AR9170_HT_CAP, | |
e9348cdd CL |
182 | }; |
183 | ||
9b9c5aae | 184 | static void ar9170_tx(struct ar9170 *ar); |
acbadf01 | 185 | static bool ar9170_tx_ampdu(struct ar9170 *ar); |
e9348cdd | 186 | |
acbadf01 CL |
187 | static inline u16 ar9170_get_seq_h(struct ieee80211_hdr *hdr) |
188 | { | |
189 | return le16_to_cpu(hdr->seq_ctrl) >> 4; | |
190 | } | |
191 | ||
192 | static inline u16 ar9170_get_seq(struct sk_buff *skb) | |
193 | { | |
194 | struct ar9170_tx_control *txc = (void *) skb->data; | |
195 | return ar9170_get_seq_h((void *) txc->frame_data); | |
196 | } | |
197 | ||
07bc5457 CL |
198 | static inline u16 ar9170_get_tid_h(struct ieee80211_hdr *hdr) |
199 | { | |
200 | return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK; | |
201 | } | |
202 | ||
acbadf01 CL |
203 | static inline u16 ar9170_get_tid(struct sk_buff *skb) |
204 | { | |
205 | struct ar9170_tx_control *txc = (void *) skb->data; | |
07bc5457 | 206 | return ar9170_get_tid_h((struct ieee80211_hdr *) txc->frame_data); |
acbadf01 CL |
207 | } |
208 | ||
209 | #define GET_NEXT_SEQ(seq) ((seq + 1) & 0x0fff) | |
210 | #define GET_NEXT_SEQ_FROM_SKB(skb) (GET_NEXT_SEQ(ar9170_get_seq(skb))) | |
211 | ||
212 | #if (defined AR9170_QUEUE_DEBUG) || (defined AR9170_TXAGG_DEBUG) | |
e9348cdd CL |
213 | static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb) |
214 | { | |
215 | struct ar9170_tx_control *txc = (void *) skb->data; | |
9b9c5aae CL |
216 | struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); |
217 | struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data; | |
218 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
e9348cdd | 219 | |
15b098bb | 220 | printk(KERN_DEBUG "%s: => FRAME [skb:%p, q:%d, DA:[%pM] s:%d " |
9b9c5aae | 221 | "mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n", |
e9348cdd | 222 | wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb), |
15b098bb | 223 | ieee80211_get_DA(hdr), ar9170_get_seq_h(hdr), |
9b9c5aae CL |
224 | le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control), |
225 | jiffies_to_msecs(arinfo->timeout - jiffies)); | |
e9348cdd CL |
226 | } |
227 | ||
9b9c5aae CL |
228 | static void __ar9170_dump_txqueue(struct ar9170 *ar, |
229 | struct sk_buff_head *queue) | |
e9348cdd CL |
230 | { |
231 | struct sk_buff *skb; | |
232 | int i = 0; | |
233 | ||
234 | printk(KERN_DEBUG "---[ cut here ]---\n"); | |
9b9c5aae | 235 | printk(KERN_DEBUG "%s: %d entries in queue.\n", |
e9348cdd CL |
236 | wiphy_name(ar->hw->wiphy), skb_queue_len(queue)); |
237 | ||
238 | skb_queue_walk(queue, skb) { | |
9b9c5aae | 239 | printk(KERN_DEBUG "index:%d => \n", i++); |
e9348cdd CL |
240 | ar9170_print_txheader(ar, skb); |
241 | } | |
9b9c5aae CL |
242 | if (i != skb_queue_len(queue)) |
243 | printk(KERN_DEBUG "WARNING: queue frame counter " | |
244 | "mismatch %d != %d\n", skb_queue_len(queue), i); | |
e9348cdd CL |
245 | printk(KERN_DEBUG "---[ end ]---\n"); |
246 | } | |
acbadf01 | 247 | #endif /* AR9170_QUEUE_DEBUG || AR9170_TXAGG_DEBUG */ |
e9348cdd | 248 | |
acbadf01 | 249 | #ifdef AR9170_QUEUE_DEBUG |
9b9c5aae CL |
250 | static void ar9170_dump_txqueue(struct ar9170 *ar, |
251 | struct sk_buff_head *queue) | |
252 | { | |
253 | unsigned long flags; | |
254 | ||
255 | spin_lock_irqsave(&queue->lock, flags); | |
256 | __ar9170_dump_txqueue(ar, queue); | |
257 | spin_unlock_irqrestore(&queue->lock, flags); | |
258 | } | |
acbadf01 | 259 | #endif /* AR9170_QUEUE_DEBUG */ |
9b9c5aae | 260 | |
acbadf01 | 261 | #ifdef AR9170_QUEUE_STOP_DEBUG |
9b9c5aae CL |
262 | static void __ar9170_dump_txstats(struct ar9170 *ar) |
263 | { | |
264 | int i; | |
265 | ||
266 | printk(KERN_DEBUG "%s: QoS queue stats\n", | |
267 | wiphy_name(ar->hw->wiphy)); | |
268 | ||
269 | for (i = 0; i < __AR9170_NUM_TXQ; i++) | |
acbadf01 CL |
270 | printk(KERN_DEBUG "%s: queue:%d limit:%d len:%d waitack:%d " |
271 | " stopped:%d\n", wiphy_name(ar->hw->wiphy), i, | |
272 | ar->tx_stats[i].limit, ar->tx_stats[i].len, | |
273 | skb_queue_len(&ar->tx_status[i]), | |
274 | ieee80211_queue_stopped(ar->hw, i)); | |
9b9c5aae | 275 | } |
acbadf01 | 276 | #endif /* AR9170_QUEUE_STOP_DEBUG */ |
9b9c5aae | 277 | |
acbadf01 CL |
278 | #ifdef AR9170_TXAGG_DEBUG |
279 | static void ar9170_dump_tx_status_ampdu(struct ar9170 *ar) | |
e9348cdd | 280 | { |
e9348cdd CL |
281 | unsigned long flags; |
282 | ||
acbadf01 CL |
283 | spin_lock_irqsave(&ar->tx_status_ampdu.lock, flags); |
284 | printk(KERN_DEBUG "%s: A-MPDU tx_status queue => \n", | |
285 | wiphy_name(ar->hw->wiphy)); | |
286 | __ar9170_dump_txqueue(ar, &ar->tx_status_ampdu); | |
287 | spin_unlock_irqrestore(&ar->tx_status_ampdu.lock, flags); | |
9b9c5aae | 288 | } |
acbadf01 CL |
289 | |
290 | #endif /* AR9170_TXAGG_DEBUG */ | |
9b9c5aae CL |
291 | |
292 | /* caller must guarantee exclusive access for _bin_ queue. */ | |
293 | static void ar9170_recycle_expired(struct ar9170 *ar, | |
294 | struct sk_buff_head *queue, | |
295 | struct sk_buff_head *bin) | |
296 | { | |
297 | struct sk_buff *skb, *old = NULL; | |
298 | unsigned long flags; | |
299 | ||
300 | spin_lock_irqsave(&queue->lock, flags); | |
301 | while ((skb = skb_peek(queue))) { | |
302 | struct ieee80211_tx_info *txinfo; | |
303 | struct ar9170_tx_info *arinfo; | |
304 | ||
305 | txinfo = IEEE80211_SKB_CB(skb); | |
306 | arinfo = (void *) txinfo->rate_driver_data; | |
307 | ||
308 | if (time_is_before_jiffies(arinfo->timeout)) { | |
309 | #ifdef AR9170_QUEUE_DEBUG | |
310 | printk(KERN_DEBUG "%s: [%ld > %ld] frame expired => " | |
311 | "recycle \n", wiphy_name(ar->hw->wiphy), | |
312 | jiffies, arinfo->timeout); | |
313 | ar9170_print_txheader(ar, skb); | |
314 | #endif /* AR9170_QUEUE_DEBUG */ | |
315 | __skb_unlink(skb, queue); | |
316 | __skb_queue_tail(bin, skb); | |
317 | } else { | |
318 | break; | |
319 | } | |
320 | ||
321 | if (unlikely(old == skb)) { | |
322 | /* bail out - queue is shot. */ | |
323 | ||
324 | WARN_ON(1); | |
325 | break; | |
326 | } | |
327 | old = skb; | |
328 | } | |
329 | spin_unlock_irqrestore(&queue->lock, flags); | |
330 | } | |
331 | ||
332 | static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb, | |
333 | u16 tx_status) | |
334 | { | |
335 | struct ieee80211_tx_info *txinfo; | |
336 | unsigned int retries = 0; | |
e9348cdd CL |
337 | |
338 | txinfo = IEEE80211_SKB_CB(skb); | |
339 | ieee80211_tx_info_clear_status(txinfo); | |
340 | ||
341 | switch (tx_status) { | |
342 | case AR9170_TX_STATUS_RETRY: | |
343 | retries = 2; | |
344 | case AR9170_TX_STATUS_COMPLETE: | |
345 | txinfo->flags |= IEEE80211_TX_STAT_ACK; | |
346 | break; | |
347 | ||
348 | case AR9170_TX_STATUS_FAILED: | |
349 | retries = ar->hw->conf.long_frame_max_tx_count; | |
350 | break; | |
351 | ||
352 | default: | |
353 | printk(KERN_ERR "%s: invalid tx_status response (%x).\n", | |
354 | wiphy_name(ar->hw->wiphy), tx_status); | |
355 | break; | |
356 | } | |
357 | ||
9b9c5aae | 358 | txinfo->status.rates[0].count = retries + 1; |
e9348cdd CL |
359 | skb_pull(skb, sizeof(struct ar9170_tx_control)); |
360 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
361 | } | |
e9348cdd | 362 | |
acbadf01 CL |
363 | static void ar9170_tx_fake_ampdu_status(struct ar9170 *ar) |
364 | { | |
365 | struct sk_buff_head success; | |
366 | struct sk_buff *skb; | |
367 | unsigned int i; | |
368 | unsigned long queue_bitmap = 0; | |
369 | ||
370 | skb_queue_head_init(&success); | |
371 | ||
372 | while (skb_queue_len(&ar->tx_status_ampdu) > AR9170_NUM_TX_STATUS) | |
373 | __skb_queue_tail(&success, skb_dequeue(&ar->tx_status_ampdu)); | |
374 | ||
375 | ar9170_recycle_expired(ar, &ar->tx_status_ampdu, &success); | |
376 | ||
377 | #ifdef AR9170_TXAGG_DEBUG | |
378 | printk(KERN_DEBUG "%s: collected %d A-MPDU frames.\n", | |
379 | wiphy_name(ar->hw->wiphy), skb_queue_len(&success)); | |
380 | __ar9170_dump_txqueue(ar, &success); | |
381 | #endif /* AR9170_TXAGG_DEBUG */ | |
382 | ||
383 | while ((skb = __skb_dequeue(&success))) { | |
384 | struct ieee80211_tx_info *txinfo; | |
385 | ||
386 | queue_bitmap |= BIT(skb_get_queue_mapping(skb)); | |
387 | ||
388 | txinfo = IEEE80211_SKB_CB(skb); | |
389 | ieee80211_tx_info_clear_status(txinfo); | |
390 | ||
391 | txinfo->flags |= IEEE80211_TX_STAT_ACK; | |
392 | txinfo->status.rates[0].count = 1; | |
393 | ||
394 | skb_pull(skb, sizeof(struct ar9170_tx_control)); | |
395 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
396 | } | |
397 | ||
984b3f57 | 398 | for_each_set_bit(i, &queue_bitmap, BITS_PER_BYTE) { |
acbadf01 CL |
399 | #ifdef AR9170_QUEUE_STOP_DEBUG |
400 | printk(KERN_DEBUG "%s: wake queue %d\n", | |
401 | wiphy_name(ar->hw->wiphy), i); | |
402 | __ar9170_dump_txstats(ar); | |
403 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
404 | ieee80211_wake_queue(ar->hw, i); | |
405 | } | |
406 | ||
407 | if (queue_bitmap) | |
408 | ar9170_tx(ar); | |
409 | } | |
410 | ||
411 | static void ar9170_tx_ampdu_callback(struct ar9170 *ar, struct sk_buff *skb) | |
412 | { | |
413 | struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); | |
414 | struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data; | |
415 | ||
416 | arinfo->timeout = jiffies + | |
417 | msecs_to_jiffies(AR9170_BA_TIMEOUT); | |
418 | ||
419 | skb_queue_tail(&ar->tx_status_ampdu, skb); | |
420 | ar9170_tx_fake_ampdu_status(ar); | |
acbadf01 | 421 | |
02bdf5b4 CL |
422 | if (atomic_dec_and_test(&ar->tx_ampdu_pending) && |
423 | !list_empty(&ar->tx_ampdu_list)) | |
acbadf01 CL |
424 | ar9170_tx_ampdu(ar); |
425 | } | |
426 | ||
9b9c5aae | 427 | void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb) |
e9348cdd | 428 | { |
9b9c5aae CL |
429 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
430 | struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data; | |
431 | unsigned int queue = skb_get_queue_mapping(skb); | |
e9348cdd | 432 | unsigned long flags; |
e9348cdd | 433 | |
9b9c5aae CL |
434 | spin_lock_irqsave(&ar->tx_stats_lock, flags); |
435 | ar->tx_stats[queue].len--; | |
e9348cdd | 436 | |
53a76b58 | 437 | if (ar->tx_stats[queue].len < AR9170_NUM_TX_LIMIT_SOFT) { |
9b9c5aae CL |
438 | #ifdef AR9170_QUEUE_STOP_DEBUG |
439 | printk(KERN_DEBUG "%s: wake queue %d\n", | |
440 | wiphy_name(ar->hw->wiphy), queue); | |
441 | __ar9170_dump_txstats(ar); | |
442 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
443 | ieee80211_wake_queue(ar->hw, queue); | |
444 | } | |
445 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
e9348cdd | 446 | |
15b098bb | 447 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) { |
9b9c5aae CL |
448 | ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED); |
449 | } else { | |
15b098bb CL |
450 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { |
451 | ar9170_tx_ampdu_callback(ar, skb); | |
452 | } else { | |
453 | arinfo->timeout = jiffies + | |
454 | msecs_to_jiffies(AR9170_TX_TIMEOUT); | |
455 | ||
456 | skb_queue_tail(&ar->tx_status[queue], skb); | |
457 | } | |
9b9c5aae CL |
458 | } |
459 | ||
460 | if (!ar->tx_stats[queue].len && | |
461 | !skb_queue_empty(&ar->tx_pending[queue])) { | |
462 | ar9170_tx(ar); | |
e9348cdd | 463 | } |
e9348cdd CL |
464 | } |
465 | ||
9b9c5aae CL |
466 | static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar, |
467 | const u8 *mac, | |
468 | struct sk_buff_head *queue, | |
469 | const u32 rate) | |
e9348cdd | 470 | { |
9b9c5aae | 471 | unsigned long flags; |
e9348cdd CL |
472 | struct sk_buff *skb; |
473 | ||
474 | /* | |
475 | * Unfortunately, the firmware does not tell to which (queued) frame | |
476 | * this transmission status report belongs to. | |
477 | * | |
478 | * So we have to make risky guesses - with the scarce information | |
479 | * the firmware provided (-> destination MAC, and phy_control) - | |
480 | * and hope that we picked the right one... | |
481 | */ | |
e9348cdd | 482 | |
9b9c5aae CL |
483 | spin_lock_irqsave(&queue->lock, flags); |
484 | skb_queue_walk(queue, skb) { | |
485 | struct ar9170_tx_control *txc = (void *) skb->data; | |
486 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
487 | u32 r; | |
488 | ||
489 | if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) { | |
e9348cdd | 490 | #ifdef AR9170_QUEUE_DEBUG |
9b9c5aae CL |
491 | printk(KERN_DEBUG "%s: skip frame => DA %pM != %pM\n", |
492 | wiphy_name(ar->hw->wiphy), mac, | |
493 | ieee80211_get_DA(hdr)); | |
494 | ar9170_print_txheader(ar, skb); | |
495 | #endif /* AR9170_QUEUE_DEBUG */ | |
496 | continue; | |
497 | } | |
498 | ||
499 | r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >> | |
500 | AR9170_TX_PHY_MCS_SHIFT; | |
501 | ||
502 | if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) { | |
503 | #ifdef AR9170_QUEUE_DEBUG | |
504 | printk(KERN_DEBUG "%s: skip frame => rate %d != %d\n", | |
505 | wiphy_name(ar->hw->wiphy), rate, r); | |
506 | ar9170_print_txheader(ar, skb); | |
507 | #endif /* AR9170_QUEUE_DEBUG */ | |
508 | continue; | |
509 | } | |
510 | ||
511 | __skb_unlink(skb, queue); | |
512 | spin_unlock_irqrestore(&queue->lock, flags); | |
513 | return skb; | |
e9348cdd | 514 | } |
9b9c5aae CL |
515 | |
516 | #ifdef AR9170_QUEUE_DEBUG | |
517 | printk(KERN_ERR "%s: ESS:[%pM] does not have any " | |
518 | "outstanding frames in queue.\n", | |
519 | wiphy_name(ar->hw->wiphy), mac); | |
520 | __ar9170_dump_txqueue(ar, queue); | |
e9348cdd | 521 | #endif /* AR9170_QUEUE_DEBUG */ |
9b9c5aae CL |
522 | spin_unlock_irqrestore(&queue->lock, flags); |
523 | ||
524 | return NULL; | |
e9348cdd CL |
525 | } |
526 | ||
acbadf01 CL |
527 | static void ar9170_handle_block_ack(struct ar9170 *ar, u16 count, u16 r) |
528 | { | |
529 | struct sk_buff *skb; | |
530 | struct ieee80211_tx_info *txinfo; | |
531 | ||
532 | while (count) { | |
533 | skb = ar9170_get_queued_skb(ar, NULL, &ar->tx_status_ampdu, r); | |
534 | if (!skb) | |
535 | break; | |
536 | ||
537 | txinfo = IEEE80211_SKB_CB(skb); | |
538 | ieee80211_tx_info_clear_status(txinfo); | |
539 | ||
540 | /* FIXME: maybe more ? */ | |
541 | txinfo->status.rates[0].count = 1; | |
542 | ||
543 | skb_pull(skb, sizeof(struct ar9170_tx_control)); | |
544 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
545 | count--; | |
546 | } | |
547 | ||
548 | #ifdef AR9170_TXAGG_DEBUG | |
549 | if (count) { | |
550 | printk(KERN_DEBUG "%s: got %d more failed mpdus, but no more " | |
551 | "suitable frames left in tx_status queue.\n", | |
552 | wiphy_name(ar->hw->wiphy), count); | |
553 | ||
554 | ar9170_dump_tx_status_ampdu(ar); | |
555 | } | |
556 | #endif /* AR9170_TXAGG_DEBUG */ | |
557 | } | |
558 | ||
e9348cdd | 559 | /* |
9b9c5aae CL |
560 | * This worker tries to keeps an maintain tx_status queues. |
561 | * So we can guarantee that incoming tx_status reports are | |
562 | * actually for a pending frame. | |
e9348cdd CL |
563 | */ |
564 | ||
9b9c5aae | 565 | static void ar9170_tx_janitor(struct work_struct *work) |
e9348cdd CL |
566 | { |
567 | struct ar9170 *ar = container_of(work, struct ar9170, | |
9b9c5aae CL |
568 | tx_janitor.work); |
569 | struct sk_buff_head waste; | |
570 | unsigned int i; | |
571 | bool resched = false; | |
e9348cdd | 572 | |
4a48e2a4 CL |
573 | if (unlikely(!IS_STARTED(ar))) |
574 | return ; | |
575 | ||
9b9c5aae CL |
576 | skb_queue_head_init(&waste); |
577 | ||
578 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { | |
e9348cdd | 579 | #ifdef AR9170_QUEUE_DEBUG |
9b9c5aae CL |
580 | printk(KERN_DEBUG "%s: garbage collector scans queue:%d\n", |
581 | wiphy_name(ar->hw->wiphy), i); | |
582 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); | |
583 | ar9170_dump_txqueue(ar, &ar->tx_status[i]); | |
e9348cdd | 584 | #endif /* AR9170_QUEUE_DEBUG */ |
e9348cdd | 585 | |
9b9c5aae CL |
586 | ar9170_recycle_expired(ar, &ar->tx_status[i], &waste); |
587 | ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste); | |
588 | skb_queue_purge(&waste); | |
e9348cdd | 589 | |
9b9c5aae CL |
590 | if (!skb_queue_empty(&ar->tx_status[i]) || |
591 | !skb_queue_empty(&ar->tx_pending[i])) | |
592 | resched = true; | |
e9348cdd CL |
593 | } |
594 | ||
acbadf01 CL |
595 | ar9170_tx_fake_ampdu_status(ar); |
596 | ||
42935eca LR |
597 | if (!resched) |
598 | return; | |
599 | ||
600 | ieee80211_queue_delayed_work(ar->hw, | |
601 | &ar->tx_janitor, | |
602 | msecs_to_jiffies(AR9170_JANITOR_DELAY)); | |
e9348cdd CL |
603 | } |
604 | ||
66d00813 | 605 | void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len) |
e9348cdd CL |
606 | { |
607 | struct ar9170_cmd_response *cmd = (void *) buf; | |
608 | ||
609 | if ((cmd->type & 0xc0) != 0xc0) { | |
610 | ar->callback_cmd(ar, len, buf); | |
611 | return; | |
612 | } | |
613 | ||
614 | /* hardware event handlers */ | |
615 | switch (cmd->type) { | |
616 | case 0xc1: { | |
617 | /* | |
618 | * TX status notification: | |
619 | * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1 | |
620 | * | |
621 | * XX always 81 | |
622 | * YY always 00 | |
623 | * M1-M6 is the MAC address | |
624 | * R1-R4 is the transmit rate | |
625 | * S1-S2 is the transmit status | |
626 | */ | |
627 | ||
628 | struct sk_buff *skb; | |
9b9c5aae CL |
629 | u32 phy = le32_to_cpu(cmd->tx_status.rate); |
630 | u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >> | |
631 | AR9170_TX_PHY_QOS_SHIFT; | |
632 | #ifdef AR9170_QUEUE_DEBUG | |
633 | printk(KERN_DEBUG "%s: recv tx_status for %pM, p:%08x, q:%d\n", | |
634 | wiphy_name(ar->hw->wiphy), cmd->tx_status.dst, phy, q); | |
635 | #endif /* AR9170_QUEUE_DEBUG */ | |
e9348cdd | 636 | |
9b9c5aae CL |
637 | skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst, |
638 | &ar->tx_status[q], | |
639 | AR9170_TX_INVALID_RATE); | |
e9348cdd CL |
640 | if (unlikely(!skb)) |
641 | return ; | |
642 | ||
9b9c5aae | 643 | ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status)); |
e9348cdd CL |
644 | break; |
645 | } | |
646 | ||
647 | case 0xc0: | |
648 | /* | |
649 | * pre-TBTT event | |
650 | */ | |
651 | if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP) | |
42935eca | 652 | ieee80211_queue_work(ar->hw, &ar->beacon_work); |
e9348cdd CL |
653 | break; |
654 | ||
655 | case 0xc2: | |
656 | /* | |
657 | * (IBSS) beacon send notification | |
658 | * bytes: 04 c2 XX YY B4 B3 B2 B1 | |
659 | * | |
660 | * XX always 80 | |
661 | * YY always 00 | |
662 | * B1-B4 "should" be the number of send out beacons. | |
663 | */ | |
664 | break; | |
665 | ||
666 | case 0xc3: | |
667 | /* End of Atim Window */ | |
668 | break; | |
669 | ||
670 | case 0xc4: | |
acbadf01 CL |
671 | /* BlockACK bitmap */ |
672 | break; | |
673 | ||
e9348cdd CL |
674 | case 0xc5: |
675 | /* BlockACK events */ | |
acbadf01 CL |
676 | ar9170_handle_block_ack(ar, |
677 | le16_to_cpu(cmd->ba_fail_cnt.failed), | |
678 | le16_to_cpu(cmd->ba_fail_cnt.rate)); | |
679 | ar9170_tx_fake_ampdu_status(ar); | |
e9348cdd CL |
680 | break; |
681 | ||
682 | case 0xc6: | |
683 | /* Watchdog Interrupt */ | |
684 | break; | |
685 | ||
686 | case 0xc9: | |
687 | /* retransmission issue / SIFS/EIFS collision ?! */ | |
688 | break; | |
689 | ||
2543a0c4 JB |
690 | /* firmware debug */ |
691 | case 0xca: | |
692 | printk(KERN_DEBUG "ar9170 FW: %.*s\n", len - 4, (char *)buf + 4); | |
693 | break; | |
694 | case 0xcb: | |
695 | len -= 4; | |
696 | ||
697 | switch (len) { | |
698 | case 1: | |
699 | printk(KERN_DEBUG "ar9170 FW: u8: %#.2x\n", | |
700 | *((char *)buf + 4)); | |
701 | break; | |
702 | case 2: | |
703 | printk(KERN_DEBUG "ar9170 FW: u8: %#.4x\n", | |
704 | le16_to_cpup((__le16 *)((char *)buf + 4))); | |
705 | break; | |
706 | case 4: | |
707 | printk(KERN_DEBUG "ar9170 FW: u8: %#.8x\n", | |
708 | le32_to_cpup((__le32 *)((char *)buf + 4))); | |
709 | break; | |
710 | case 8: | |
711 | printk(KERN_DEBUG "ar9170 FW: u8: %#.16lx\n", | |
712 | (unsigned long)le64_to_cpup( | |
713 | (__le64 *)((char *)buf + 4))); | |
714 | break; | |
715 | } | |
716 | break; | |
717 | case 0xcc: | |
718 | print_hex_dump_bytes("ar9170 FW:", DUMP_PREFIX_NONE, | |
719 | (char *)buf + 4, len - 4); | |
720 | break; | |
721 | ||
e9348cdd CL |
722 | default: |
723 | printk(KERN_INFO "received unhandled event %x\n", cmd->type); | |
724 | print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len); | |
725 | break; | |
726 | } | |
727 | } | |
728 | ||
cca84799 | 729 | static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar) |
e9348cdd | 730 | { |
cca84799 CL |
731 | memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head)); |
732 | ar->rx_mpdu.has_plcp = false; | |
733 | } | |
e9348cdd | 734 | |
9b9c5aae | 735 | int ar9170_nag_limiter(struct ar9170 *ar) |
cca84799 CL |
736 | { |
737 | bool print_message; | |
738 | ||
739 | /* | |
740 | * we expect all sorts of errors in promiscuous mode. | |
741 | * don't bother with it, it's OK! | |
742 | */ | |
743 | if (ar->sniffer_enabled) | |
744 | return false; | |
745 | ||
746 | /* | |
747 | * only go for frequent errors! The hardware tends to | |
748 | * do some stupid thing once in a while under load, in | |
749 | * noisy environments or just for fun! | |
750 | */ | |
751 | if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit()) | |
752 | print_message = true; | |
753 | else | |
754 | print_message = false; | |
755 | ||
756 | /* reset threshold for "once in a while" */ | |
757 | ar->bad_hw_nagger = jiffies + HZ / 4; | |
758 | return print_message; | |
759 | } | |
760 | ||
761 | static int ar9170_rx_mac_status(struct ar9170 *ar, | |
762 | struct ar9170_rx_head *head, | |
763 | struct ar9170_rx_macstatus *mac, | |
764 | struct ieee80211_rx_status *status) | |
765 | { | |
766 | u8 error, decrypt; | |
e9348cdd | 767 | |
e9348cdd | 768 | BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12); |
cca84799 | 769 | BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4); |
e9348cdd | 770 | |
cca84799 CL |
771 | error = mac->error; |
772 | if (error & AR9170_RX_ERROR_MMIC) { | |
773 | status->flag |= RX_FLAG_MMIC_ERROR; | |
774 | error &= ~AR9170_RX_ERROR_MMIC; | |
775 | } | |
e9348cdd | 776 | |
cca84799 CL |
777 | if (error & AR9170_RX_ERROR_PLCP) { |
778 | status->flag |= RX_FLAG_FAILED_PLCP_CRC; | |
779 | error &= ~AR9170_RX_ERROR_PLCP; | |
e9348cdd | 780 | |
cca84799 CL |
781 | if (!(ar->filter_state & FIF_PLCPFAIL)) |
782 | return -EINVAL; | |
783 | } | |
e9348cdd | 784 | |
cca84799 CL |
785 | if (error & AR9170_RX_ERROR_FCS) { |
786 | status->flag |= RX_FLAG_FAILED_FCS_CRC; | |
787 | error &= ~AR9170_RX_ERROR_FCS; | |
e9348cdd | 788 | |
cca84799 CL |
789 | if (!(ar->filter_state & FIF_FCSFAIL)) |
790 | return -EINVAL; | |
791 | } | |
792 | ||
793 | decrypt = ar9170_get_decrypt_type(mac); | |
794 | if (!(decrypt & AR9170_RX_ENC_SOFTWARE) && | |
795 | decrypt != AR9170_ENC_ALG_NONE) | |
796 | status->flag |= RX_FLAG_DECRYPTED; | |
e9348cdd | 797 | |
cca84799 CL |
798 | /* ignore wrong RA errors */ |
799 | error &= ~AR9170_RX_ERROR_WRONG_RA; | |
e9348cdd | 800 | |
cca84799 CL |
801 | if (error & AR9170_RX_ERROR_DECRYPT) { |
802 | error &= ~AR9170_RX_ERROR_DECRYPT; | |
803 | /* | |
804 | * Rx decryption is done in place, | |
805 | * the original data is lost anyway. | |
806 | */ | |
807 | ||
808 | return -EINVAL; | |
809 | } | |
810 | ||
811 | /* drop any other error frames */ | |
812 | if (unlikely(error)) { | |
813 | /* TODO: update netdevice's RX dropped/errors statistics */ | |
814 | ||
815 | if (ar9170_nag_limiter(ar)) | |
816 | printk(KERN_DEBUG "%s: received frame with " | |
817 | "suspicious error code (%#x).\n", | |
818 | wiphy_name(ar->hw->wiphy), error); | |
819 | ||
820 | return -EINVAL; | |
821 | } | |
822 | ||
823 | status->band = ar->channel->band; | |
824 | status->freq = ar->channel->center_freq; | |
825 | ||
826 | switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) { | |
e9348cdd | 827 | case AR9170_RX_STATUS_MODULATION_CCK: |
cca84799 CL |
828 | if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE) |
829 | status->flag |= RX_FLAG_SHORTPRE; | |
e9348cdd CL |
830 | switch (head->plcp[0]) { |
831 | case 0x0a: | |
cca84799 | 832 | status->rate_idx = 0; |
e9348cdd CL |
833 | break; |
834 | case 0x14: | |
cca84799 | 835 | status->rate_idx = 1; |
e9348cdd CL |
836 | break; |
837 | case 0x37: | |
cca84799 | 838 | status->rate_idx = 2; |
e9348cdd CL |
839 | break; |
840 | case 0x6e: | |
cca84799 | 841 | status->rate_idx = 3; |
e9348cdd CL |
842 | break; |
843 | default: | |
cca84799 | 844 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
845 | printk(KERN_ERR "%s: invalid plcp cck rate " |
846 | "(%x).\n", wiphy_name(ar->hw->wiphy), | |
847 | head->plcp[0]); | |
cca84799 | 848 | return -EINVAL; |
e9348cdd CL |
849 | } |
850 | break; | |
cca84799 | 851 | |
7d57b73a | 852 | case AR9170_RX_STATUS_MODULATION_DUPOFDM: |
e9348cdd | 853 | case AR9170_RX_STATUS_MODULATION_OFDM: |
cca84799 CL |
854 | switch (head->plcp[0] & 0xf) { |
855 | case 0xb: | |
856 | status->rate_idx = 0; | |
e9348cdd | 857 | break; |
cca84799 CL |
858 | case 0xf: |
859 | status->rate_idx = 1; | |
e9348cdd | 860 | break; |
cca84799 CL |
861 | case 0xa: |
862 | status->rate_idx = 2; | |
e9348cdd | 863 | break; |
cca84799 CL |
864 | case 0xe: |
865 | status->rate_idx = 3; | |
e9348cdd CL |
866 | break; |
867 | case 0x9: | |
cca84799 | 868 | status->rate_idx = 4; |
e9348cdd | 869 | break; |
cca84799 CL |
870 | case 0xd: |
871 | status->rate_idx = 5; | |
e9348cdd CL |
872 | break; |
873 | case 0x8: | |
cca84799 | 874 | status->rate_idx = 6; |
e9348cdd | 875 | break; |
cca84799 CL |
876 | case 0xc: |
877 | status->rate_idx = 7; | |
e9348cdd CL |
878 | break; |
879 | default: | |
cca84799 | 880 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
881 | printk(KERN_ERR "%s: invalid plcp ofdm rate " |
882 | "(%x).\n", wiphy_name(ar->hw->wiphy), | |
883 | head->plcp[0]); | |
cca84799 | 884 | return -EINVAL; |
e9348cdd | 885 | } |
cca84799 CL |
886 | if (status->band == IEEE80211_BAND_2GHZ) |
887 | status->rate_idx += 4; | |
e9348cdd | 888 | break; |
cca84799 | 889 | |
e9348cdd | 890 | case AR9170_RX_STATUS_MODULATION_HT: |
cca84799 CL |
891 | if (head->plcp[3] & 0x80) |
892 | status->flag |= RX_FLAG_40MHZ; | |
893 | if (head->plcp[6] & 0x80) | |
894 | status->flag |= RX_FLAG_SHORT_GI; | |
895 | ||
896 | status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f); | |
897 | status->flag |= RX_FLAG_HT; | |
898 | break; | |
899 | ||
7d57b73a | 900 | default: |
cca84799 | 901 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
902 | printk(KERN_ERR "%s: invalid modulation\n", |
903 | wiphy_name(ar->hw->wiphy)); | |
cca84799 | 904 | return -EINVAL; |
e9348cdd CL |
905 | } |
906 | ||
cca84799 CL |
907 | return 0; |
908 | } | |
e9348cdd | 909 | |
cca84799 CL |
910 | static void ar9170_rx_phy_status(struct ar9170 *ar, |
911 | struct ar9170_rx_phystatus *phy, | |
912 | struct ieee80211_rx_status *status) | |
913 | { | |
914 | int i; | |
e9348cdd | 915 | |
cca84799 CL |
916 | BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20); |
917 | ||
918 | for (i = 0; i < 3; i++) | |
919 | if (phy->rssi[i] != 0x80) | |
920 | status->antenna |= BIT(i); | |
921 | ||
922 | /* post-process RSSI */ | |
923 | for (i = 0; i < 7; i++) | |
924 | if (phy->rssi[i] & 0x80) | |
925 | phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f; | |
926 | ||
927 | /* TODO: we could do something with phy_errors */ | |
928 | status->signal = ar->noise[0] + phy->rssi_combined; | |
929 | status->noise = ar->noise[0]; | |
930 | } | |
931 | ||
932 | static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len) | |
933 | { | |
934 | struct sk_buff *skb; | |
935 | int reserved = 0; | |
936 | struct ieee80211_hdr *hdr = (void *) buf; | |
937 | ||
938 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
939 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
940 | reserved += NET_IP_ALIGN; | |
941 | ||
942 | if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) | |
943 | reserved += NET_IP_ALIGN; | |
e9348cdd CL |
944 | } |
945 | ||
cca84799 CL |
946 | if (ieee80211_has_a4(hdr->frame_control)) |
947 | reserved += NET_IP_ALIGN; | |
948 | ||
949 | reserved = 32 + (reserved & NET_IP_ALIGN); | |
950 | ||
951 | skb = dev_alloc_skb(len + reserved); | |
952 | if (likely(skb)) { | |
953 | skb_reserve(skb, reserved); | |
954 | memcpy(skb_put(skb, len), buf, len); | |
e9348cdd CL |
955 | } |
956 | ||
cca84799 CL |
957 | return skb; |
958 | } | |
e9348cdd | 959 | |
cca84799 CL |
960 | /* |
961 | * If the frame alignment is right (or the kernel has | |
962 | * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there | |
963 | * is only a single MPDU in the USB frame, then we could | |
964 | * submit to mac80211 the SKB directly. However, since | |
965 | * there may be multiple packets in one SKB in stream | |
966 | * mode, and we need to observe the proper ordering, | |
967 | * this is non-trivial. | |
968 | */ | |
e9348cdd | 969 | |
cca84799 CL |
970 | static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) |
971 | { | |
972 | struct ar9170_rx_head *head; | |
973 | struct ar9170_rx_macstatus *mac; | |
974 | struct ar9170_rx_phystatus *phy = NULL; | |
975 | struct ieee80211_rx_status status; | |
976 | struct sk_buff *skb; | |
977 | int mpdu_len; | |
978 | ||
979 | if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac)))) | |
980 | return ; | |
981 | ||
982 | /* Received MPDU */ | |
983 | mpdu_len = len - sizeof(*mac); | |
984 | ||
985 | mac = (void *)(buf + mpdu_len); | |
986 | if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) { | |
987 | /* this frame is too damaged and can't be used - drop it */ | |
e9348cdd | 988 | |
e9348cdd CL |
989 | return ; |
990 | } | |
991 | ||
cca84799 CL |
992 | switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) { |
993 | case AR9170_RX_STATUS_MPDU_FIRST: | |
994 | /* first mpdu packet has the plcp header */ | |
995 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) { | |
996 | head = (void *) buf; | |
997 | memcpy(&ar->rx_mpdu.plcp, (void *) buf, | |
998 | sizeof(struct ar9170_rx_head)); | |
999 | ||
1000 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
1001 | buf += sizeof(struct ar9170_rx_head); | |
1002 | ar->rx_mpdu.has_plcp = true; | |
1003 | } else { | |
1004 | if (ar9170_nag_limiter(ar)) | |
1005 | printk(KERN_ERR "%s: plcp info is clipped.\n", | |
1006 | wiphy_name(ar->hw->wiphy)); | |
1007 | return ; | |
1008 | } | |
1009 | break; | |
1010 | ||
1011 | case AR9170_RX_STATUS_MPDU_LAST: | |
1012 | /* last mpdu has a extra tail with phy status information */ | |
1013 | ||
1014 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) { | |
1015 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
1016 | phy = (void *)(buf + mpdu_len); | |
1017 | } else { | |
1018 | if (ar9170_nag_limiter(ar)) | |
1019 | printk(KERN_ERR "%s: frame tail is clipped.\n", | |
1020 | wiphy_name(ar->hw->wiphy)); | |
1021 | return ; | |
1022 | } | |
1023 | ||
1024 | case AR9170_RX_STATUS_MPDU_MIDDLE: | |
1025 | /* middle mpdus are just data */ | |
1026 | if (unlikely(!ar->rx_mpdu.has_plcp)) { | |
1027 | if (!ar9170_nag_limiter(ar)) | |
1028 | return ; | |
1029 | ||
1030 | printk(KERN_ERR "%s: rx stream did not start " | |
1031 | "with a first_mpdu frame tag.\n", | |
1032 | wiphy_name(ar->hw->wiphy)); | |
1033 | ||
1034 | return ; | |
1035 | } | |
1036 | ||
1037 | head = &ar->rx_mpdu.plcp; | |
1038 | break; | |
1039 | ||
1040 | case AR9170_RX_STATUS_MPDU_SINGLE: | |
1041 | /* single mpdu - has plcp (head) and phy status (tail) */ | |
1042 | head = (void *) buf; | |
1043 | ||
1044 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
1045 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
1046 | ||
1047 | buf += sizeof(struct ar9170_rx_head); | |
1048 | phy = (void *)(buf + mpdu_len); | |
1049 | break; | |
1050 | ||
1051 | default: | |
1052 | BUG_ON(1); | |
1053 | break; | |
e9348cdd CL |
1054 | } |
1055 | ||
cca84799 CL |
1056 | if (unlikely(mpdu_len < FCS_LEN)) |
1057 | return ; | |
e9348cdd | 1058 | |
cca84799 CL |
1059 | memset(&status, 0, sizeof(status)); |
1060 | if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status))) | |
1061 | return ; | |
e9348cdd | 1062 | |
cca84799 CL |
1063 | if (phy) |
1064 | ar9170_rx_phy_status(ar, phy, &status); | |
e9348cdd | 1065 | |
cca84799 | 1066 | skb = ar9170_rx_copy_data(buf, mpdu_len); |
f1d58c25 JB |
1067 | if (likely(skb)) { |
1068 | memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); | |
1069 | ieee80211_rx_irqsafe(ar->hw, skb); | |
1070 | } | |
e9348cdd CL |
1071 | } |
1072 | ||
e9348cdd CL |
1073 | void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb) |
1074 | { | |
cca84799 | 1075 | unsigned int i, tlen, resplen, wlen = 0, clen = 0; |
e9348cdd CL |
1076 | u8 *tbuf, *respbuf; |
1077 | ||
1078 | tbuf = skb->data; | |
1079 | tlen = skb->len; | |
1080 | ||
1081 | while (tlen >= 4) { | |
cca84799 CL |
1082 | clen = tbuf[1] << 8 | tbuf[0]; |
1083 | wlen = ALIGN(clen, 4); | |
e9348cdd | 1084 | |
cca84799 | 1085 | /* check if this is stream has a valid tag.*/ |
e9348cdd | 1086 | if (tbuf[2] != 0 || tbuf[3] != 0x4e) { |
cca84799 CL |
1087 | /* |
1088 | * TODO: handle the highly unlikely event that the | |
1089 | * corrupted stream has the TAG at the right position. | |
1090 | */ | |
1091 | ||
1092 | /* check if the frame can be repaired. */ | |
1093 | if (!ar->rx_failover_missing) { | |
1094 | /* this is no "short read". */ | |
1095 | if (ar9170_nag_limiter(ar)) { | |
1096 | printk(KERN_ERR "%s: missing tag!\n", | |
1097 | wiphy_name(ar->hw->wiphy)); | |
1098 | goto err_telluser; | |
1099 | } else | |
1100 | goto err_silent; | |
1101 | } | |
1102 | ||
1103 | if (ar->rx_failover_missing > tlen) { | |
1104 | if (ar9170_nag_limiter(ar)) { | |
1105 | printk(KERN_ERR "%s: possible multi " | |
1106 | "stream corruption!\n", | |
1107 | wiphy_name(ar->hw->wiphy)); | |
1108 | goto err_telluser; | |
1109 | } else | |
1110 | goto err_silent; | |
1111 | } | |
1112 | ||
1113 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
1114 | ar->rx_failover_missing -= tlen; | |
1115 | ||
1116 | if (ar->rx_failover_missing <= 0) { | |
1117 | /* | |
1118 | * nested ar9170_rx call! | |
1119 | * termination is guranteed, even when the | |
1120 | * combined frame also have a element with | |
1121 | * a bad tag. | |
1122 | */ | |
1123 | ||
1124 | ar->rx_failover_missing = 0; | |
1125 | ar9170_rx(ar, ar->rx_failover); | |
1126 | ||
1127 | skb_reset_tail_pointer(ar->rx_failover); | |
1128 | skb_trim(ar->rx_failover, 0); | |
1129 | } | |
1130 | ||
e9348cdd CL |
1131 | return ; |
1132 | } | |
cca84799 CL |
1133 | |
1134 | /* check if stream is clipped */ | |
e9348cdd | 1135 | if (wlen > tlen - 4) { |
cca84799 CL |
1136 | if (ar->rx_failover_missing) { |
1137 | /* TODO: handle double stream corruption. */ | |
1138 | if (ar9170_nag_limiter(ar)) { | |
1139 | printk(KERN_ERR "%s: double rx stream " | |
1140 | "corruption!\n", | |
1141 | wiphy_name(ar->hw->wiphy)); | |
1142 | goto err_telluser; | |
1143 | } else | |
1144 | goto err_silent; | |
1145 | } | |
1146 | ||
1147 | /* | |
1148 | * save incomplete data set. | |
1149 | * the firmware will resend the missing bits when | |
1150 | * the rx - descriptor comes round again. | |
1151 | */ | |
1152 | ||
1153 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
1154 | ar->rx_failover_missing = clen - tlen; | |
e9348cdd CL |
1155 | return ; |
1156 | } | |
1157 | resplen = clen; | |
1158 | respbuf = tbuf + 4; | |
1159 | tbuf += wlen + 4; | |
1160 | tlen -= wlen + 4; | |
1161 | ||
1162 | i = 0; | |
1163 | ||
1164 | /* weird thing, but this is the same in the original driver */ | |
1165 | while (resplen > 2 && i < 12 && | |
1166 | respbuf[0] == 0xff && respbuf[1] == 0xff) { | |
1167 | i += 2; | |
1168 | resplen -= 2; | |
1169 | respbuf += 2; | |
1170 | } | |
1171 | ||
1172 | if (resplen < 4) | |
1173 | continue; | |
1174 | ||
1175 | /* found the 6 * 0xffff marker? */ | |
1176 | if (i == 12) | |
1177 | ar9170_handle_command_response(ar, respbuf, resplen); | |
1178 | else | |
cca84799 | 1179 | ar9170_handle_mpdu(ar, respbuf, clen); |
e9348cdd CL |
1180 | } |
1181 | ||
cca84799 CL |
1182 | if (tlen) { |
1183 | if (net_ratelimit()) | |
1184 | printk(KERN_ERR "%s: %d bytes of unprocessed " | |
1185 | "data left in rx stream!\n", | |
1186 | wiphy_name(ar->hw->wiphy), tlen); | |
1187 | ||
1188 | goto err_telluser; | |
1189 | } | |
1190 | ||
1191 | return ; | |
1192 | ||
1193 | err_telluser: | |
1194 | printk(KERN_ERR "%s: damaged RX stream data [want:%d, " | |
1195 | "data:%d, rx:%d, pending:%d ]\n", | |
1196 | wiphy_name(ar->hw->wiphy), clen, wlen, tlen, | |
1197 | ar->rx_failover_missing); | |
1198 | ||
1199 | if (ar->rx_failover_missing) | |
1200 | print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET, | |
1201 | ar->rx_failover->data, | |
1202 | ar->rx_failover->len); | |
1203 | ||
1204 | print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET, | |
1205 | skb->data, skb->len); | |
1206 | ||
1207 | printk(KERN_ERR "%s: please check your hardware and cables, if " | |
1208 | "you see this message frequently.\n", | |
1209 | wiphy_name(ar->hw->wiphy)); | |
1210 | ||
1211 | err_silent: | |
1212 | if (ar->rx_failover_missing) { | |
1213 | skb_reset_tail_pointer(ar->rx_failover); | |
1214 | skb_trim(ar->rx_failover, 0); | |
1215 | ar->rx_failover_missing = 0; | |
1216 | } | |
e9348cdd | 1217 | } |
e9348cdd CL |
1218 | |
1219 | #define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \ | |
1220 | do { \ | |
1221 | queue.aifs = ai_fs; \ | |
1222 | queue.cw_min = cwmin; \ | |
1223 | queue.cw_max = cwmax; \ | |
1224 | queue.txop = _txop; \ | |
1225 | } while (0) | |
1226 | ||
1227 | static int ar9170_op_start(struct ieee80211_hw *hw) | |
1228 | { | |
1229 | struct ar9170 *ar = hw->priv; | |
1230 | int err, i; | |
1231 | ||
1232 | mutex_lock(&ar->mutex); | |
1233 | ||
1234 | /* reinitialize queues statistics */ | |
1235 | memset(&ar->tx_stats, 0, sizeof(ar->tx_stats)); | |
9b9c5aae CL |
1236 | for (i = 0; i < __AR9170_NUM_TXQ; i++) |
1237 | ar->tx_stats[i].limit = AR9170_TXQ_DEPTH; | |
e9348cdd CL |
1238 | |
1239 | /* reset QoS defaults */ | |
1240 | AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/ | |
1241 | AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */ | |
1242 | AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */ | |
1243 | AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */ | |
1244 | AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */ | |
1245 | ||
acbadf01 CL |
1246 | /* set sane AMPDU defaults */ |
1247 | ar->global_ampdu_density = 6; | |
1248 | ar->global_ampdu_factor = 3; | |
1249 | ||
02bdf5b4 | 1250 | atomic_set(&ar->tx_ampdu_pending, 0); |
cca84799 CL |
1251 | ar->bad_hw_nagger = jiffies; |
1252 | ||
e9348cdd CL |
1253 | err = ar->open(ar); |
1254 | if (err) | |
1255 | goto out; | |
1256 | ||
1257 | err = ar9170_init_mac(ar); | |
1258 | if (err) | |
1259 | goto out; | |
1260 | ||
1261 | err = ar9170_set_qos(ar); | |
1262 | if (err) | |
1263 | goto out; | |
1264 | ||
1265 | err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ); | |
1266 | if (err) | |
1267 | goto out; | |
1268 | ||
1269 | err = ar9170_init_rf(ar); | |
1270 | if (err) | |
1271 | goto out; | |
1272 | ||
1273 | /* start DMA */ | |
1274 | err = ar9170_write_reg(ar, 0x1c3d30, 0x100); | |
1275 | if (err) | |
1276 | goto out; | |
1277 | ||
1278 | ar->state = AR9170_STARTED; | |
1279 | ||
1280 | out: | |
1281 | mutex_unlock(&ar->mutex); | |
1282 | return err; | |
1283 | } | |
1284 | ||
1285 | static void ar9170_op_stop(struct ieee80211_hw *hw) | |
1286 | { | |
1287 | struct ar9170 *ar = hw->priv; | |
9b9c5aae | 1288 | unsigned int i; |
e9348cdd CL |
1289 | |
1290 | if (IS_STARTED(ar)) | |
1291 | ar->state = AR9170_IDLE; | |
1292 | ||
9b9c5aae | 1293 | cancel_delayed_work_sync(&ar->tx_janitor); |
ff8365ca | 1294 | #ifdef CONFIG_AR9170_LEDS |
acbadf01 | 1295 | cancel_delayed_work_sync(&ar->led_work); |
ff8365ca | 1296 | #endif |
e9348cdd | 1297 | cancel_work_sync(&ar->beacon_work); |
e351cfbf | 1298 | |
b55d6bcf | 1299 | mutex_lock(&ar->mutex); |
e9348cdd CL |
1300 | |
1301 | if (IS_ACCEPTING_CMD(ar)) { | |
1302 | ar9170_set_leds_state(ar, 0); | |
1303 | ||
1304 | /* stop DMA */ | |
1305 | ar9170_write_reg(ar, 0x1c3d30, 0); | |
1306 | ar->stop(ar); | |
1307 | } | |
1308 | ||
9b9c5aae CL |
1309 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { |
1310 | skb_queue_purge(&ar->tx_pending[i]); | |
1311 | skb_queue_purge(&ar->tx_status[i]); | |
1312 | } | |
acbadf01 CL |
1313 | skb_queue_purge(&ar->tx_status_ampdu); |
1314 | ||
e9348cdd CL |
1315 | mutex_unlock(&ar->mutex); |
1316 | } | |
1317 | ||
acbadf01 CL |
1318 | static void ar9170_tx_indicate_immba(struct ar9170 *ar, struct sk_buff *skb) |
1319 | { | |
1320 | struct ar9170_tx_control *txc = (void *) skb->data; | |
1321 | ||
1322 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_IMM_AMPDU); | |
1323 | } | |
1324 | ||
1325 | static void ar9170_tx_copy_phy(struct ar9170 *ar, struct sk_buff *dst, | |
1326 | struct sk_buff *src) | |
1327 | { | |
1328 | struct ar9170_tx_control *dst_txc, *src_txc; | |
1329 | struct ieee80211_tx_info *dst_info, *src_info; | |
1330 | struct ar9170_tx_info *dst_arinfo, *src_arinfo; | |
1331 | ||
1332 | src_txc = (void *) src->data; | |
1333 | src_info = IEEE80211_SKB_CB(src); | |
1334 | src_arinfo = (void *) src_info->rate_driver_data; | |
1335 | ||
1336 | dst_txc = (void *) dst->data; | |
1337 | dst_info = IEEE80211_SKB_CB(dst); | |
1338 | dst_arinfo = (void *) dst_info->rate_driver_data; | |
1339 | ||
1340 | dst_txc->phy_control = src_txc->phy_control; | |
1341 | ||
1342 | /* same MCS for the whole aggregate */ | |
1343 | memcpy(dst_info->driver_rates, src_info->driver_rates, | |
1344 | sizeof(dst_info->driver_rates)); | |
1345 | } | |
1346 | ||
9b9c5aae | 1347 | static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb) |
e9348cdd | 1348 | { |
e9348cdd CL |
1349 | struct ieee80211_hdr *hdr; |
1350 | struct ar9170_tx_control *txc; | |
1351 | struct ieee80211_tx_info *info; | |
e9348cdd | 1352 | struct ieee80211_tx_rate *txrate; |
9b9c5aae | 1353 | struct ar9170_tx_info *arinfo; |
e9348cdd | 1354 | unsigned int queue = skb_get_queue_mapping(skb); |
e9348cdd CL |
1355 | u16 keytype = 0; |
1356 | u16 len, icv = 0; | |
e9348cdd | 1357 | |
9b9c5aae | 1358 | BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data)); |
e9348cdd CL |
1359 | |
1360 | hdr = (void *)skb->data; | |
1361 | info = IEEE80211_SKB_CB(skb); | |
1362 | len = skb->len; | |
1363 | ||
e9348cdd CL |
1364 | txc = (void *)skb_push(skb, sizeof(*txc)); |
1365 | ||
e9348cdd CL |
1366 | if (info->control.hw_key) { |
1367 | icv = info->control.hw_key->icv_len; | |
1368 | ||
1369 | switch (info->control.hw_key->alg) { | |
1370 | case ALG_WEP: | |
1371 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1372 | break; | |
1373 | case ALG_TKIP: | |
1374 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1375 | break; | |
1376 | case ALG_CCMP: | |
1377 | keytype = AR9170_TX_MAC_ENCR_AES; | |
1378 | break; | |
1379 | default: | |
1380 | WARN_ON(1); | |
9b9c5aae | 1381 | goto err_out; |
e9348cdd CL |
1382 | } |
1383 | } | |
1384 | ||
1385 | /* Length */ | |
1386 | txc->length = cpu_to_le16(len + icv + 4); | |
1387 | ||
1388 | txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION | | |
1389 | AR9170_TX_MAC_BACKOFF); | |
1390 | txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] << | |
1391 | AR9170_TX_MAC_QOS_SHIFT); | |
1392 | txc->mac_control |= cpu_to_le16(keytype); | |
1393 | txc->phy_control = cpu_to_le32(0); | |
1394 | ||
1395 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1396 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK); | |
1397 | ||
e9348cdd | 1398 | txrate = &info->control.rates[0]; |
e9348cdd CL |
1399 | if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
1400 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS); | |
1401 | else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS) | |
1402 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS); | |
1403 | ||
9b9c5aae CL |
1404 | arinfo = (void *)info->rate_driver_data; |
1405 | arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT); | |
1406 | ||
1407 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && | |
1408 | (is_valid_ether_addr(ieee80211_get_DA(hdr)))) { | |
9b9c5aae CL |
1409 | /* |
1410 | * WARNING: | |
1411 | * Putting the QoS queue bits into an unexplored territory is | |
1412 | * certainly not elegant. | |
1413 | * | |
1414 | * In my defense: This idea provides a reasonable way to | |
1415 | * smuggle valuable information to the tx_status callback. | |
1416 | * Also, the idea behind this bit-abuse came straight from | |
1417 | * the original driver code. | |
1418 | */ | |
1419 | ||
1420 | txc->phy_control |= | |
1421 | cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT); | |
15b098bb CL |
1422 | |
1423 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { | |
1424 | if (unlikely(!info->control.sta)) | |
1425 | goto err_out; | |
1426 | ||
1427 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR); | |
1428 | } else { | |
1429 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE); | |
1430 | } | |
9b9c5aae CL |
1431 | } |
1432 | ||
9b9c5aae CL |
1433 | return 0; |
1434 | ||
1435 | err_out: | |
1436 | skb_pull(skb, sizeof(*txc)); | |
1437 | return -EINVAL; | |
1438 | } | |
1439 | ||
1440 | static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb) | |
1441 | { | |
1442 | struct ar9170_tx_control *txc; | |
1443 | struct ieee80211_tx_info *info; | |
1444 | struct ieee80211_rate *rate = NULL; | |
1445 | struct ieee80211_tx_rate *txrate; | |
1446 | u32 power, chains; | |
1447 | ||
1448 | txc = (void *) skb->data; | |
1449 | info = IEEE80211_SKB_CB(skb); | |
1450 | txrate = &info->control.rates[0]; | |
1451 | ||
e9348cdd CL |
1452 | if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD) |
1453 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD); | |
1454 | ||
1455 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) | |
1456 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE); | |
1457 | ||
1458 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
1459 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ); | |
1460 | /* this works because 40 MHz is 2 and dup is 3 */ | |
1461 | if (txrate->flags & IEEE80211_TX_RC_DUP_DATA) | |
1462 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP); | |
1463 | ||
1464 | if (txrate->flags & IEEE80211_TX_RC_SHORT_GI) | |
1465 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI); | |
1466 | ||
1467 | if (txrate->flags & IEEE80211_TX_RC_MCS) { | |
1468 | u32 r = txrate->idx; | |
1469 | u8 *txpower; | |
1470 | ||
9b9c5aae CL |
1471 | /* heavy clip control */ |
1472 | txc->phy_control |= cpu_to_le32((r & 0x7) << 7); | |
1473 | ||
e9348cdd | 1474 | r <<= AR9170_TX_PHY_MCS_SHIFT; |
9b9c5aae CL |
1475 | BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK); |
1476 | ||
e9348cdd CL |
1477 | txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK); |
1478 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT); | |
1479 | ||
1480 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) { | |
1481 | if (info->band == IEEE80211_BAND_5GHZ) | |
1482 | txpower = ar->power_5G_ht40; | |
1483 | else | |
1484 | txpower = ar->power_2G_ht40; | |
1485 | } else { | |
1486 | if (info->band == IEEE80211_BAND_5GHZ) | |
1487 | txpower = ar->power_5G_ht20; | |
1488 | else | |
1489 | txpower = ar->power_2G_ht20; | |
1490 | } | |
1491 | ||
1492 | power = txpower[(txrate->idx) & 7]; | |
1493 | } else { | |
1494 | u8 *txpower; | |
1495 | u32 mod; | |
1496 | u32 phyrate; | |
1497 | u8 idx = txrate->idx; | |
1498 | ||
1499 | if (info->band != IEEE80211_BAND_2GHZ) { | |
1500 | idx += 4; | |
1501 | txpower = ar->power_5G_leg; | |
1502 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1503 | } else { | |
1504 | if (idx < 4) { | |
1505 | txpower = ar->power_2G_cck; | |
1506 | mod = AR9170_TX_PHY_MOD_CCK; | |
1507 | } else { | |
1508 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1509 | txpower = ar->power_2G_ofdm; | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | rate = &__ar9170_ratetable[idx]; | |
1514 | ||
1515 | phyrate = rate->hw_value & 0xF; | |
1516 | power = txpower[(rate->hw_value & 0x30) >> 4]; | |
1517 | phyrate <<= AR9170_TX_PHY_MCS_SHIFT; | |
1518 | ||
1519 | txc->phy_control |= cpu_to_le32(mod); | |
1520 | txc->phy_control |= cpu_to_le32(phyrate); | |
1521 | } | |
1522 | ||
1523 | power <<= AR9170_TX_PHY_TX_PWR_SHIFT; | |
1524 | power &= AR9170_TX_PHY_TX_PWR_MASK; | |
1525 | txc->phy_control |= cpu_to_le32(power); | |
1526 | ||
1527 | /* set TX chains */ | |
1528 | if (ar->eeprom.tx_mask == 1) { | |
1529 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1530 | } else { | |
1531 | chains = AR9170_TX_PHY_TXCHAIN_2; | |
1532 | ||
1533 | /* >= 36M legacy OFDM - use only one chain */ | |
1534 | if (rate && rate->bitrate >= 360) | |
1535 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1536 | } | |
1537 | txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT); | |
9b9c5aae | 1538 | } |
e9348cdd | 1539 | |
acbadf01 CL |
1540 | static bool ar9170_tx_ampdu(struct ar9170 *ar) |
1541 | { | |
1542 | struct sk_buff_head agg; | |
1543 | struct ar9170_sta_tid *tid_info = NULL, *tmp; | |
1544 | struct sk_buff *skb, *first = NULL; | |
1545 | unsigned long flags, f2; | |
1546 | unsigned int i = 0; | |
1547 | u16 seq, queue, tmpssn; | |
1548 | bool run = false; | |
1549 | ||
1550 | skb_queue_head_init(&agg); | |
1551 | ||
1552 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
1553 | if (list_empty(&ar->tx_ampdu_list)) { | |
1554 | #ifdef AR9170_TXAGG_DEBUG | |
1555 | printk(KERN_DEBUG "%s: aggregation list is empty.\n", | |
1556 | wiphy_name(ar->hw->wiphy)); | |
1557 | #endif /* AR9170_TXAGG_DEBUG */ | |
1558 | goto out_unlock; | |
1559 | } | |
1560 | ||
1561 | list_for_each_entry_safe(tid_info, tmp, &ar->tx_ampdu_list, list) { | |
1562 | if (tid_info->state != AR9170_TID_STATE_COMPLETE) { | |
1563 | #ifdef AR9170_TXAGG_DEBUG | |
1564 | printk(KERN_DEBUG "%s: dangling aggregation entry!\n", | |
1565 | wiphy_name(ar->hw->wiphy)); | |
1566 | #endif /* AR9170_TXAGG_DEBUG */ | |
1567 | continue; | |
1568 | } | |
1569 | ||
1570 | if (++i > 64) { | |
1571 | #ifdef AR9170_TXAGG_DEBUG | |
1572 | printk(KERN_DEBUG "%s: enough frames aggregated.\n", | |
1573 | wiphy_name(ar->hw->wiphy)); | |
1574 | #endif /* AR9170_TXAGG_DEBUG */ | |
1575 | break; | |
1576 | } | |
1577 | ||
1578 | queue = TID_TO_WME_AC(tid_info->tid); | |
1579 | ||
1580 | if (skb_queue_len(&ar->tx_pending[queue]) >= | |
1581 | AR9170_NUM_TX_AGG_MAX) { | |
1582 | #ifdef AR9170_TXAGG_DEBUG | |
1583 | printk(KERN_DEBUG "%s: queue %d full.\n", | |
1584 | wiphy_name(ar->hw->wiphy), queue); | |
1585 | #endif /* AR9170_TXAGG_DEBUG */ | |
1586 | continue; | |
1587 | } | |
1588 | ||
1589 | list_del_init(&tid_info->list); | |
1590 | ||
1591 | spin_lock_irqsave(&tid_info->queue.lock, f2); | |
1592 | tmpssn = seq = tid_info->ssn; | |
1593 | first = skb_peek(&tid_info->queue); | |
1594 | ||
1595 | if (likely(first)) | |
1596 | tmpssn = ar9170_get_seq(first); | |
1597 | ||
1598 | if (unlikely(tmpssn != seq)) { | |
1599 | #ifdef AR9170_TXAGG_DEBUG | |
1600 | printk(KERN_DEBUG "%s: ssn mismatch [%d != %d]\n.", | |
1601 | wiphy_name(ar->hw->wiphy), seq, tmpssn); | |
1602 | #endif /* AR9170_TXAGG_DEBUG */ | |
1603 | tid_info->ssn = tmpssn; | |
1604 | } | |
1605 | ||
1606 | #ifdef AR9170_TXAGG_DEBUG | |
1607 | printk(KERN_DEBUG "%s: generate A-MPDU for tid:%d ssn:%d with " | |
1608 | "%d queued frames.\n", wiphy_name(ar->hw->wiphy), | |
1609 | tid_info->tid, tid_info->ssn, | |
1610 | skb_queue_len(&tid_info->queue)); | |
1611 | __ar9170_dump_txqueue(ar, &tid_info->queue); | |
1612 | #endif /* AR9170_TXAGG_DEBUG */ | |
1613 | ||
1614 | while ((skb = skb_peek(&tid_info->queue))) { | |
1615 | if (unlikely(ar9170_get_seq(skb) != seq)) | |
1616 | break; | |
1617 | ||
1618 | __skb_unlink(skb, &tid_info->queue); | |
1619 | tid_info->ssn = seq = GET_NEXT_SEQ(seq); | |
1620 | ||
1621 | if (unlikely(skb_get_queue_mapping(skb) != queue)) { | |
1622 | #ifdef AR9170_TXAGG_DEBUG | |
1623 | printk(KERN_DEBUG "%s: tid:%d(q:%d) queue:%d " | |
1624 | "!match.\n", wiphy_name(ar->hw->wiphy), | |
1625 | tid_info->tid, | |
1626 | TID_TO_WME_AC(tid_info->tid), | |
1627 | skb_get_queue_mapping(skb)); | |
1628 | #endif /* AR9170_TXAGG_DEBUG */ | |
1629 | dev_kfree_skb_any(skb); | |
1630 | continue; | |
1631 | } | |
1632 | ||
1633 | if (unlikely(first == skb)) { | |
1634 | ar9170_tx_prepare_phy(ar, skb); | |
1635 | __skb_queue_tail(&agg, skb); | |
1636 | first = skb; | |
1637 | } else { | |
1638 | ar9170_tx_copy_phy(ar, skb, first); | |
1639 | __skb_queue_tail(&agg, skb); | |
1640 | } | |
1641 | ||
1642 | if (unlikely(skb_queue_len(&agg) == | |
1643 | AR9170_NUM_TX_AGG_MAX)) | |
1644 | break; | |
1645 | } | |
1646 | ||
1647 | if (skb_queue_empty(&tid_info->queue)) | |
1648 | tid_info->active = false; | |
1649 | else | |
1650 | list_add_tail(&tid_info->list, | |
1651 | &ar->tx_ampdu_list); | |
1652 | ||
1653 | spin_unlock_irqrestore(&tid_info->queue.lock, f2); | |
1654 | ||
1655 | if (unlikely(skb_queue_empty(&agg))) { | |
1656 | #ifdef AR9170_TXAGG_DEBUG | |
1657 | printk(KERN_DEBUG "%s: queued empty list!\n", | |
1658 | wiphy_name(ar->hw->wiphy)); | |
1659 | #endif /* AR9170_TXAGG_DEBUG */ | |
1660 | continue; | |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | * tell the FW/HW that this is the last frame, | |
1665 | * that way it will wait for the immediate block ack. | |
1666 | */ | |
07bc5457 | 1667 | ar9170_tx_indicate_immba(ar, skb_peek_tail(&agg)); |
acbadf01 CL |
1668 | |
1669 | #ifdef AR9170_TXAGG_DEBUG | |
1670 | printk(KERN_DEBUG "%s: generated A-MPDU looks like this:\n", | |
1671 | wiphy_name(ar->hw->wiphy)); | |
1672 | __ar9170_dump_txqueue(ar, &agg); | |
1673 | #endif /* AR9170_TXAGG_DEBUG */ | |
1674 | ||
1675 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
1676 | ||
1677 | spin_lock_irqsave(&ar->tx_pending[queue].lock, flags); | |
1678 | skb_queue_splice_tail_init(&agg, &ar->tx_pending[queue]); | |
1679 | spin_unlock_irqrestore(&ar->tx_pending[queue].lock, flags); | |
1680 | run = true; | |
1681 | ||
1682 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
1683 | } | |
1684 | ||
1685 | out_unlock: | |
1686 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
1687 | __skb_queue_purge(&agg); | |
1688 | ||
1689 | return run; | |
1690 | } | |
1691 | ||
9b9c5aae CL |
1692 | static void ar9170_tx(struct ar9170 *ar) |
1693 | { | |
1694 | struct sk_buff *skb; | |
1695 | unsigned long flags; | |
1696 | struct ieee80211_tx_info *info; | |
1697 | struct ar9170_tx_info *arinfo; | |
1698 | unsigned int i, frames, frames_failed, remaining_space; | |
1699 | int err; | |
1700 | bool schedule_garbagecollector = false; | |
e9348cdd | 1701 | |
9b9c5aae | 1702 | BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data)); |
e9348cdd | 1703 | |
9b9c5aae CL |
1704 | if (unlikely(!IS_STARTED(ar))) |
1705 | return ; | |
1706 | ||
1707 | remaining_space = AR9170_TX_MAX_PENDING; | |
1708 | ||
1709 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { | |
1710 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
53a76b58 CL |
1711 | frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len, |
1712 | skb_queue_len(&ar->tx_pending[i])); | |
1713 | ||
1714 | if (remaining_space < frames) { | |
1715 | #ifdef AR9170_QUEUE_DEBUG | |
1716 | printk(KERN_DEBUG "%s: tx quota reached queue:%d, " | |
1717 | "remaining slots:%d, needed:%d\n", | |
1718 | wiphy_name(ar->hw->wiphy), i, remaining_space, | |
1719 | frames); | |
1720 | #endif /* AR9170_QUEUE_DEBUG */ | |
1721 | frames = remaining_space; | |
1722 | } | |
1723 | ||
1724 | ar->tx_stats[i].len += frames; | |
1725 | ar->tx_stats[i].count += frames; | |
9b9c5aae CL |
1726 | if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) { |
1727 | #ifdef AR9170_QUEUE_DEBUG | |
1728 | printk(KERN_DEBUG "%s: queue %d full\n", | |
1729 | wiphy_name(ar->hw->wiphy), i); | |
1730 | ||
acbadf01 CL |
1731 | printk(KERN_DEBUG "%s: stuck frames: ===> \n", |
1732 | wiphy_name(ar->hw->wiphy)); | |
9b9c5aae CL |
1733 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); |
1734 | ar9170_dump_txqueue(ar, &ar->tx_status[i]); | |
1735 | #endif /* AR9170_QUEUE_DEBUG */ | |
acbadf01 CL |
1736 | |
1737 | #ifdef AR9170_QUEUE_STOP_DEBUG | |
1738 | printk(KERN_DEBUG "%s: stop queue %d\n", | |
1739 | wiphy_name(ar->hw->wiphy), i); | |
1740 | __ar9170_dump_txstats(ar); | |
1741 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
9b9c5aae | 1742 | ieee80211_stop_queue(ar->hw, i); |
9b9c5aae | 1743 | } |
e9348cdd | 1744 | |
9b9c5aae CL |
1745 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); |
1746 | ||
1747 | if (!frames) | |
1748 | continue; | |
1749 | ||
1750 | frames_failed = 0; | |
1751 | while (frames) { | |
1752 | skb = skb_dequeue(&ar->tx_pending[i]); | |
1753 | if (unlikely(!skb)) { | |
1754 | frames_failed += frames; | |
1755 | frames = 0; | |
1756 | break; | |
1757 | } | |
1758 | ||
1759 | info = IEEE80211_SKB_CB(skb); | |
1760 | arinfo = (void *) info->rate_driver_data; | |
1761 | ||
1762 | /* TODO: cancel stuck frames */ | |
1763 | arinfo->timeout = jiffies + | |
1764 | msecs_to_jiffies(AR9170_TX_TIMEOUT); | |
1765 | ||
15b098bb | 1766 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
02bdf5b4 | 1767 | atomic_inc(&ar->tx_ampdu_pending); |
acbadf01 | 1768 | |
9b9c5aae CL |
1769 | #ifdef AR9170_QUEUE_DEBUG |
1770 | printk(KERN_DEBUG "%s: send frame q:%d =>\n", | |
1771 | wiphy_name(ar->hw->wiphy), i); | |
1772 | ar9170_print_txheader(ar, skb); | |
1773 | #endif /* AR9170_QUEUE_DEBUG */ | |
1774 | ||
1775 | err = ar->tx(ar, skb); | |
1776 | if (unlikely(err)) { | |
15b098bb | 1777 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
02bdf5b4 | 1778 | atomic_dec(&ar->tx_ampdu_pending); |
acbadf01 | 1779 | |
9b9c5aae CL |
1780 | frames_failed++; |
1781 | dev_kfree_skb_any(skb); | |
1782 | } else { | |
1783 | remaining_space--; | |
1784 | schedule_garbagecollector = true; | |
1785 | } | |
1786 | ||
1787 | frames--; | |
1788 | } | |
1789 | ||
1790 | #ifdef AR9170_QUEUE_DEBUG | |
1791 | printk(KERN_DEBUG "%s: ar9170_tx report for queue %d\n", | |
1792 | wiphy_name(ar->hw->wiphy), i); | |
1793 | ||
1794 | printk(KERN_DEBUG "%s: unprocessed pending frames left:\n", | |
1795 | wiphy_name(ar->hw->wiphy)); | |
1796 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); | |
1797 | #endif /* AR9170_QUEUE_DEBUG */ | |
1798 | ||
1799 | if (unlikely(frames_failed)) { | |
1800 | #ifdef AR9170_QUEUE_DEBUG | |
acbadf01 | 1801 | printk(KERN_DEBUG "%s: frames failed %d =>\n", |
9b9c5aae CL |
1802 | wiphy_name(ar->hw->wiphy), frames_failed); |
1803 | #endif /* AR9170_QUEUE_DEBUG */ | |
1804 | ||
1805 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1806 | ar->tx_stats[i].len -= frames_failed; | |
1807 | ar->tx_stats[i].count -= frames_failed; | |
acbadf01 CL |
1808 | #ifdef AR9170_QUEUE_STOP_DEBUG |
1809 | printk(KERN_DEBUG "%s: wake queue %d\n", | |
1810 | wiphy_name(ar->hw->wiphy), i); | |
1811 | __ar9170_dump_txstats(ar); | |
1812 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
9b9c5aae CL |
1813 | ieee80211_wake_queue(ar->hw, i); |
1814 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
e9348cdd CL |
1815 | } |
1816 | } | |
1817 | ||
42935eca LR |
1818 | if (!schedule_garbagecollector) |
1819 | return; | |
1820 | ||
1821 | ieee80211_queue_delayed_work(ar->hw, | |
1822 | &ar->tx_janitor, | |
1823 | msecs_to_jiffies(AR9170_JANITOR_DELAY)); | |
9b9c5aae CL |
1824 | } |
1825 | ||
acbadf01 CL |
1826 | static bool ar9170_tx_ampdu_queue(struct ar9170 *ar, struct sk_buff *skb) |
1827 | { | |
1828 | struct ieee80211_tx_info *txinfo; | |
1829 | struct ar9170_sta_info *sta_info; | |
1830 | struct ar9170_sta_tid *agg; | |
1831 | struct sk_buff *iter; | |
1832 | unsigned long flags, f2; | |
1833 | unsigned int max; | |
1834 | u16 tid, seq, qseq; | |
1835 | bool run = false, queue = false; | |
1836 | ||
1837 | tid = ar9170_get_tid(skb); | |
1838 | seq = ar9170_get_seq(skb); | |
1839 | txinfo = IEEE80211_SKB_CB(skb); | |
1840 | sta_info = (void *) txinfo->control.sta->drv_priv; | |
1841 | agg = &sta_info->agg[tid]; | |
1842 | max = sta_info->ampdu_max_len; | |
1843 | ||
1844 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
1845 | ||
1846 | if (unlikely(agg->state != AR9170_TID_STATE_COMPLETE)) { | |
1847 | #ifdef AR9170_TXAGG_DEBUG | |
1848 | printk(KERN_DEBUG "%s: BlockACK session not fully initialized " | |
1849 | "for ESS:%pM tid:%d state:%d.\n", | |
1850 | wiphy_name(ar->hw->wiphy), agg->addr, agg->tid, | |
1851 | agg->state); | |
1852 | #endif /* AR9170_TXAGG_DEBUG */ | |
1853 | goto err_unlock; | |
1854 | } | |
1855 | ||
1856 | if (!agg->active) { | |
1857 | agg->active = true; | |
1858 | agg->ssn = seq; | |
1859 | queue = true; | |
1860 | } | |
1861 | ||
1862 | /* check if seq is within the BA window */ | |
1863 | if (unlikely(!BAW_WITHIN(agg->ssn, max, seq))) { | |
1864 | #ifdef AR9170_TXAGG_DEBUG | |
1865 | printk(KERN_DEBUG "%s: frame with tid:%d seq:%d does not " | |
1866 | "fit into BA window (%d - %d)\n", | |
1867 | wiphy_name(ar->hw->wiphy), tid, seq, agg->ssn, | |
1868 | (agg->ssn + max) & 0xfff); | |
1869 | #endif /* AR9170_TXAGG_DEBUG */ | |
1870 | goto err_unlock; | |
1871 | } | |
1872 | ||
1873 | spin_lock_irqsave(&agg->queue.lock, f2); | |
1874 | ||
1875 | skb_queue_reverse_walk(&agg->queue, iter) { | |
1876 | qseq = ar9170_get_seq(iter); | |
1877 | ||
1878 | if (GET_NEXT_SEQ(qseq) == seq) { | |
1879 | __skb_queue_after(&agg->queue, iter, skb); | |
1880 | goto queued; | |
1881 | } | |
1882 | } | |
1883 | ||
1884 | __skb_queue_head(&agg->queue, skb); | |
1885 | ||
1886 | queued: | |
1887 | spin_unlock_irqrestore(&agg->queue.lock, f2); | |
1888 | ||
1889 | #ifdef AR9170_TXAGG_DEBUG | |
1890 | printk(KERN_DEBUG "%s: new aggregate %p queued.\n", | |
1891 | wiphy_name(ar->hw->wiphy), skb); | |
1892 | __ar9170_dump_txqueue(ar, &agg->queue); | |
1893 | #endif /* AR9170_TXAGG_DEBUG */ | |
1894 | ||
1895 | if (skb_queue_len(&agg->queue) >= AR9170_NUM_TX_AGG_MAX) | |
1896 | run = true; | |
1897 | ||
1898 | if (queue) | |
1899 | list_add_tail(&agg->list, &ar->tx_ampdu_list); | |
1900 | ||
1901 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
1902 | return run; | |
1903 | ||
1904 | err_unlock: | |
1905 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
1906 | dev_kfree_skb_irq(skb); | |
1907 | return false; | |
1908 | } | |
1909 | ||
9b9c5aae CL |
1910 | int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) |
1911 | { | |
1912 | struct ar9170 *ar = hw->priv; | |
1913 | struct ieee80211_tx_info *info; | |
1914 | ||
1915 | if (unlikely(!IS_STARTED(ar))) | |
1916 | goto err_free; | |
1917 | ||
1918 | if (unlikely(ar9170_tx_prepare(ar, skb))) | |
1919 | goto err_free; | |
1920 | ||
1921 | info = IEEE80211_SKB_CB(skb); | |
1922 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { | |
acbadf01 CL |
1923 | bool run = ar9170_tx_ampdu_queue(ar, skb); |
1924 | ||
02bdf5b4 | 1925 | if (run || !atomic_read(&ar->tx_ampdu_pending)) |
acbadf01 | 1926 | ar9170_tx_ampdu(ar); |
9b9c5aae CL |
1927 | } else { |
1928 | unsigned int queue = skb_get_queue_mapping(skb); | |
1929 | ||
1930 | ar9170_tx_prepare_phy(ar, skb); | |
1931 | skb_queue_tail(&ar->tx_pending[queue], skb); | |
e9348cdd CL |
1932 | } |
1933 | ||
9b9c5aae | 1934 | ar9170_tx(ar); |
e9348cdd CL |
1935 | return NETDEV_TX_OK; |
1936 | ||
e9348cdd | 1937 | err_free: |
9b9c5aae | 1938 | dev_kfree_skb_any(skb); |
e9348cdd CL |
1939 | return NETDEV_TX_OK; |
1940 | } | |
1941 | ||
1942 | static int ar9170_op_add_interface(struct ieee80211_hw *hw, | |
1ed32e4f | 1943 | struct ieee80211_vif *vif) |
e9348cdd CL |
1944 | { |
1945 | struct ar9170 *ar = hw->priv; | |
8c727e70 | 1946 | struct ath_common *common = &ar->common; |
e9348cdd CL |
1947 | int err = 0; |
1948 | ||
1949 | mutex_lock(&ar->mutex); | |
1950 | ||
1951 | if (ar->vif) { | |
1952 | err = -EBUSY; | |
1953 | goto unlock; | |
1954 | } | |
1955 | ||
1ed32e4f JB |
1956 | ar->vif = vif; |
1957 | memcpy(common->macaddr, vif->addr, ETH_ALEN); | |
e9348cdd CL |
1958 | |
1959 | if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) { | |
1960 | ar->rx_software_decryption = true; | |
1961 | ar->disable_offload = true; | |
1962 | } | |
1963 | ||
1964 | ar->cur_filter = 0; | |
eeef4185 | 1965 | err = ar9170_update_frame_filter(ar, AR9170_MAC_REG_FTF_DEFAULTS); |
e9348cdd CL |
1966 | if (err) |
1967 | goto unlock; | |
1968 | ||
1969 | err = ar9170_set_operating_mode(ar); | |
1970 | ||
1971 | unlock: | |
1972 | mutex_unlock(&ar->mutex); | |
1973 | return err; | |
1974 | } | |
1975 | ||
1976 | static void ar9170_op_remove_interface(struct ieee80211_hw *hw, | |
1ed32e4f | 1977 | struct ieee80211_vif *vif) |
e9348cdd CL |
1978 | { |
1979 | struct ar9170 *ar = hw->priv; | |
1980 | ||
1981 | mutex_lock(&ar->mutex); | |
1982 | ar->vif = NULL; | |
eeef4185 | 1983 | ar9170_update_frame_filter(ar, 0); |
e9348cdd CL |
1984 | ar9170_set_beacon_timers(ar); |
1985 | dev_kfree_skb(ar->beacon); | |
1986 | ar->beacon = NULL; | |
1987 | ar->sniffer_enabled = false; | |
1988 | ar->rx_software_decryption = false; | |
1989 | ar9170_set_operating_mode(ar); | |
1990 | mutex_unlock(&ar->mutex); | |
1991 | } | |
1992 | ||
1993 | static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed) | |
1994 | { | |
1995 | struct ar9170 *ar = hw->priv; | |
1996 | int err = 0; | |
1997 | ||
1998 | mutex_lock(&ar->mutex); | |
1999 | ||
e9348cdd CL |
2000 | if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) { |
2001 | /* TODO */ | |
2002 | err = 0; | |
2003 | } | |
2004 | ||
2005 | if (changed & IEEE80211_CONF_CHANGE_PS) { | |
2006 | /* TODO */ | |
2007 | err = 0; | |
2008 | } | |
2009 | ||
2010 | if (changed & IEEE80211_CONF_CHANGE_POWER) { | |
2011 | /* TODO */ | |
2012 | err = 0; | |
2013 | } | |
2014 | ||
2015 | if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) { | |
2016 | /* | |
2017 | * is it long_frame_max_tx_count or short_frame_max_tx_count? | |
2018 | */ | |
2019 | ||
2020 | err = ar9170_set_hwretry_limit(ar, | |
2021 | ar->hw->conf.long_frame_max_tx_count); | |
2022 | if (err) | |
2023 | goto out; | |
2024 | } | |
2025 | ||
e9348cdd | 2026 | if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { |
29ceff5d CL |
2027 | |
2028 | /* adjust slot time for 5 GHz */ | |
2029 | err = ar9170_set_slot_time(ar); | |
2030 | if (err) | |
2031 | goto out; | |
2032 | ||
2033 | err = ar9170_set_dyn_sifs_ack(ar); | |
2034 | if (err) | |
2035 | goto out; | |
2036 | ||
e9348cdd | 2037 | err = ar9170_set_channel(ar, hw->conf.channel, |
9e52b062 JB |
2038 | AR9170_RFI_NONE, |
2039 | nl80211_to_ar9170(hw->conf.channel_type)); | |
e9348cdd CL |
2040 | if (err) |
2041 | goto out; | |
e9348cdd CL |
2042 | } |
2043 | ||
2044 | out: | |
2045 | mutex_unlock(&ar->mutex); | |
2046 | return err; | |
2047 | } | |
2048 | ||
3ac64bee JB |
2049 | static u64 ar9170_op_prepare_multicast(struct ieee80211_hw *hw, int mc_count, |
2050 | struct dev_addr_list *mclist) | |
2051 | { | |
2052 | u64 mchash; | |
2053 | int i; | |
2054 | ||
2055 | /* always get broadcast frames */ | |
2056 | mchash = 1ULL << (0xff >> 2); | |
2057 | ||
2058 | for (i = 0; i < mc_count; i++) { | |
2059 | if (WARN_ON(!mclist)) | |
2060 | break; | |
2061 | mchash |= 1ULL << (mclist->dmi_addr[5] >> 2); | |
2062 | mclist = mclist->next; | |
2063 | } | |
2064 | ||
2065 | return mchash; | |
2066 | } | |
2067 | ||
e9348cdd CL |
2068 | static void ar9170_op_configure_filter(struct ieee80211_hw *hw, |
2069 | unsigned int changed_flags, | |
2070 | unsigned int *new_flags, | |
3ac64bee | 2071 | u64 multicast) |
e9348cdd CL |
2072 | { |
2073 | struct ar9170 *ar = hw->priv; | |
2074 | ||
eeef4185 CL |
2075 | if (unlikely(!IS_ACCEPTING_CMD(ar))) |
2076 | return ; | |
2077 | ||
2078 | mutex_lock(&ar->mutex); | |
2079 | ||
e9348cdd CL |
2080 | /* mask supported flags */ |
2081 | *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC | | |
cca84799 CL |
2082 | FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL; |
2083 | ar->filter_state = *new_flags; | |
e9348cdd CL |
2084 | /* |
2085 | * We can support more by setting the sniffer bit and | |
2086 | * then checking the error flags, later. | |
2087 | */ | |
2088 | ||
3ac64bee | 2089 | if (changed_flags & FIF_ALLMULTI && *new_flags & FIF_ALLMULTI) |
eeef4185 | 2090 | multicast = ~0ULL; |
e9348cdd | 2091 | |
eeef4185 CL |
2092 | if (multicast != ar->cur_mc_hash) |
2093 | ar9170_update_multicast(ar, multicast); | |
e9348cdd CL |
2094 | |
2095 | if (changed_flags & FIF_CONTROL) { | |
2096 | u32 filter = AR9170_MAC_REG_FTF_PSPOLL | | |
2097 | AR9170_MAC_REG_FTF_RTS | | |
2098 | AR9170_MAC_REG_FTF_CTS | | |
2099 | AR9170_MAC_REG_FTF_ACK | | |
2100 | AR9170_MAC_REG_FTF_CFE | | |
2101 | AR9170_MAC_REG_FTF_CFE_ACK; | |
2102 | ||
2103 | if (*new_flags & FIF_CONTROL) | |
eeef4185 | 2104 | filter |= ar->cur_filter; |
e9348cdd | 2105 | else |
eeef4185 | 2106 | filter &= (~ar->cur_filter); |
e9348cdd | 2107 | |
eeef4185 | 2108 | ar9170_update_frame_filter(ar, filter); |
e9348cdd CL |
2109 | } |
2110 | ||
2111 | if (changed_flags & FIF_PROMISC_IN_BSS) { | |
2112 | ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0; | |
eeef4185 | 2113 | ar9170_set_operating_mode(ar); |
e9348cdd CL |
2114 | } |
2115 | ||
eeef4185 | 2116 | mutex_unlock(&ar->mutex); |
e9348cdd CL |
2117 | } |
2118 | ||
eeef4185 | 2119 | |
e9348cdd CL |
2120 | static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw, |
2121 | struct ieee80211_vif *vif, | |
2122 | struct ieee80211_bss_conf *bss_conf, | |
2123 | u32 changed) | |
2124 | { | |
2125 | struct ar9170 *ar = hw->priv; | |
8c727e70 | 2126 | struct ath_common *common = &ar->common; |
e9348cdd CL |
2127 | int err = 0; |
2128 | ||
2129 | mutex_lock(&ar->mutex); | |
2130 | ||
2d0ddec5 | 2131 | if (changed & BSS_CHANGED_BSSID) { |
8c727e70 | 2132 | memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); |
2d0ddec5 | 2133 | err = ar9170_set_operating_mode(ar); |
29ceff5d CL |
2134 | if (err) |
2135 | goto out; | |
2d0ddec5 JB |
2136 | } |
2137 | ||
ea39d1a4 JA |
2138 | if (changed & BSS_CHANGED_BEACON_ENABLED) |
2139 | ar->enable_beacon = bss_conf->enable_beacon; | |
2140 | ||
2141 | if (changed & BSS_CHANGED_BEACON) { | |
2d0ddec5 | 2142 | err = ar9170_update_beacon(ar); |
29ceff5d CL |
2143 | if (err) |
2144 | goto out; | |
ea39d1a4 | 2145 | } |
2d0ddec5 | 2146 | |
ea39d1a4 JA |
2147 | if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON | |
2148 | BSS_CHANGED_BEACON_INT)) { | |
29ceff5d CL |
2149 | err = ar9170_set_beacon_timers(ar); |
2150 | if (err) | |
2151 | goto out; | |
2152 | } | |
e9348cdd CL |
2153 | |
2154 | if (changed & BSS_CHANGED_ASSOC) { | |
e9348cdd CL |
2155 | #ifndef CONFIG_AR9170_LEDS |
2156 | /* enable assoc LED. */ | |
2157 | err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0); | |
2158 | #endif /* CONFIG_AR9170_LEDS */ | |
2159 | } | |
2160 | ||
2161 | if (changed & BSS_CHANGED_HT) { | |
2162 | /* TODO */ | |
2163 | err = 0; | |
2164 | } | |
2165 | ||
2166 | if (changed & BSS_CHANGED_ERP_SLOT) { | |
29ceff5d CL |
2167 | err = ar9170_set_slot_time(ar); |
2168 | if (err) | |
2169 | goto out; | |
e9348cdd CL |
2170 | } |
2171 | ||
2172 | if (changed & BSS_CHANGED_BASIC_RATES) { | |
29ceff5d CL |
2173 | err = ar9170_set_basic_rates(ar); |
2174 | if (err) | |
2175 | goto out; | |
e9348cdd CL |
2176 | } |
2177 | ||
29ceff5d | 2178 | out: |
e9348cdd CL |
2179 | mutex_unlock(&ar->mutex); |
2180 | } | |
2181 | ||
2182 | static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw) | |
2183 | { | |
2184 | struct ar9170 *ar = hw->priv; | |
2185 | int err; | |
e9348cdd | 2186 | u64 tsf; |
181af387 JA |
2187 | #define NR 3 |
2188 | static const u32 addr[NR] = { AR9170_MAC_REG_TSF_H, | |
2189 | AR9170_MAC_REG_TSF_L, | |
2190 | AR9170_MAC_REG_TSF_H }; | |
2191 | u32 val[NR]; | |
2192 | int loops = 0; | |
e9348cdd CL |
2193 | |
2194 | mutex_lock(&ar->mutex); | |
181af387 JA |
2195 | |
2196 | while (loops++ < 10) { | |
2197 | err = ar9170_read_mreg(ar, NR, addr, val); | |
2198 | if (err || val[0] == val[2]) | |
2199 | break; | |
2200 | } | |
2201 | ||
e9348cdd CL |
2202 | mutex_unlock(&ar->mutex); |
2203 | ||
2204 | if (WARN_ON(err)) | |
2205 | return 0; | |
181af387 JA |
2206 | tsf = val[0]; |
2207 | tsf = (tsf << 32) | val[1]; | |
e9348cdd | 2208 | return tsf; |
181af387 | 2209 | #undef NR |
e9348cdd CL |
2210 | } |
2211 | ||
2212 | static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, | |
2213 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, | |
2214 | struct ieee80211_key_conf *key) | |
2215 | { | |
2216 | struct ar9170 *ar = hw->priv; | |
2217 | int err = 0, i; | |
2218 | u8 ktype; | |
2219 | ||
2220 | if ((!ar->vif) || (ar->disable_offload)) | |
2221 | return -EOPNOTSUPP; | |
2222 | ||
2223 | switch (key->alg) { | |
2224 | case ALG_WEP: | |
e31a16d6 | 2225 | if (key->keylen == WLAN_KEY_LEN_WEP40) |
e9348cdd CL |
2226 | ktype = AR9170_ENC_ALG_WEP64; |
2227 | else | |
2228 | ktype = AR9170_ENC_ALG_WEP128; | |
2229 | break; | |
2230 | case ALG_TKIP: | |
2231 | ktype = AR9170_ENC_ALG_TKIP; | |
2232 | break; | |
2233 | case ALG_CCMP: | |
2234 | ktype = AR9170_ENC_ALG_AESCCMP; | |
2235 | break; | |
2236 | default: | |
2237 | return -EOPNOTSUPP; | |
2238 | } | |
2239 | ||
2240 | mutex_lock(&ar->mutex); | |
2241 | if (cmd == SET_KEY) { | |
2242 | if (unlikely(!IS_STARTED(ar))) { | |
2243 | err = -EOPNOTSUPP; | |
2244 | goto out; | |
2245 | } | |
2246 | ||
2247 | /* group keys need all-zeroes address */ | |
2248 | if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
2249 | sta = NULL; | |
2250 | ||
2251 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) { | |
2252 | for (i = 0; i < 64; i++) | |
2253 | if (!(ar->usedkeys & BIT(i))) | |
2254 | break; | |
2255 | if (i == 64) { | |
2256 | ar->rx_software_decryption = true; | |
2257 | ar9170_set_operating_mode(ar); | |
2258 | err = -ENOSPC; | |
2259 | goto out; | |
2260 | } | |
2261 | } else { | |
2262 | i = 64 + key->keyidx; | |
2263 | } | |
2264 | ||
2265 | key->hw_key_idx = i; | |
2266 | ||
2267 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0, | |
2268 | key->key, min_t(u8, 16, key->keylen)); | |
2269 | if (err) | |
2270 | goto out; | |
2271 | ||
2272 | if (key->alg == ALG_TKIP) { | |
2273 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, | |
2274 | ktype, 1, key->key + 16, 16); | |
2275 | if (err) | |
2276 | goto out; | |
2277 | ||
2278 | /* | |
2279 | * hardware is not capable generating the MMIC | |
2280 | * for fragmented frames! | |
2281 | */ | |
2282 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
2283 | } | |
2284 | ||
2285 | if (i < 64) | |
2286 | ar->usedkeys |= BIT(i); | |
2287 | ||
2288 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
2289 | } else { | |
2290 | if (unlikely(!IS_STARTED(ar))) { | |
2291 | /* The device is gone... together with the key ;-) */ | |
2292 | err = 0; | |
2293 | goto out; | |
2294 | } | |
2295 | ||
2296 | err = ar9170_disable_key(ar, key->hw_key_idx); | |
2297 | if (err) | |
2298 | goto out; | |
2299 | ||
2300 | if (key->hw_key_idx < 64) { | |
2301 | ar->usedkeys &= ~BIT(key->hw_key_idx); | |
2302 | } else { | |
2303 | err = ar9170_upload_key(ar, key->hw_key_idx, NULL, | |
2304 | AR9170_ENC_ALG_NONE, 0, | |
2305 | NULL, 0); | |
2306 | if (err) | |
2307 | goto out; | |
2308 | ||
2309 | if (key->alg == ALG_TKIP) { | |
2310 | err = ar9170_upload_key(ar, key->hw_key_idx, | |
2311 | NULL, | |
2312 | AR9170_ENC_ALG_NONE, 1, | |
2313 | NULL, 0); | |
2314 | if (err) | |
2315 | goto out; | |
2316 | } | |
2317 | ||
2318 | } | |
2319 | } | |
2320 | ||
2321 | ar9170_regwrite_begin(ar); | |
2322 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys); | |
2323 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32); | |
2324 | ar9170_regwrite_finish(); | |
2325 | err = ar9170_regwrite_result(); | |
2326 | ||
2327 | out: | |
2328 | mutex_unlock(&ar->mutex); | |
2329 | ||
2330 | return err; | |
2331 | } | |
2332 | ||
3e60f860 JB |
2333 | static int ar9170_sta_add(struct ieee80211_hw *hw, |
2334 | struct ieee80211_vif *vif, | |
2335 | struct ieee80211_sta *sta) | |
e9348cdd | 2336 | { |
acbadf01 CL |
2337 | struct ar9170 *ar = hw->priv; |
2338 | struct ar9170_sta_info *sta_info = (void *) sta->drv_priv; | |
2339 | unsigned int i; | |
2340 | ||
3e60f860 | 2341 | memset(sta_info, 0, sizeof(*sta_info)); |
acbadf01 | 2342 | |
3e60f860 JB |
2343 | if (!sta->ht_cap.ht_supported) |
2344 | return 0; | |
acbadf01 | 2345 | |
3e60f860 JB |
2346 | if (sta->ht_cap.ampdu_density > ar->global_ampdu_density) |
2347 | ar->global_ampdu_density = sta->ht_cap.ampdu_density; | |
acbadf01 | 2348 | |
3e60f860 JB |
2349 | if (sta->ht_cap.ampdu_factor < ar->global_ampdu_factor) |
2350 | ar->global_ampdu_factor = sta->ht_cap.ampdu_factor; | |
acbadf01 | 2351 | |
3e60f860 JB |
2352 | for (i = 0; i < AR9170_NUM_TID; i++) { |
2353 | sta_info->agg[i].state = AR9170_TID_STATE_SHUTDOWN; | |
2354 | sta_info->agg[i].active = false; | |
2355 | sta_info->agg[i].ssn = 0; | |
2356 | sta_info->agg[i].tid = i; | |
2357 | INIT_LIST_HEAD(&sta_info->agg[i].list); | |
2358 | skb_queue_head_init(&sta_info->agg[i].queue); | |
2359 | } | |
acbadf01 | 2360 | |
3e60f860 | 2361 | sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor); |
acbadf01 | 2362 | |
3e60f860 JB |
2363 | return 0; |
2364 | } | |
acbadf01 | 2365 | |
3e60f860 JB |
2366 | static int ar9170_sta_remove(struct ieee80211_hw *hw, |
2367 | struct ieee80211_vif *vif, | |
2368 | struct ieee80211_sta *sta) | |
2369 | { | |
2370 | struct ar9170_sta_info *sta_info = (void *) sta->drv_priv; | |
2371 | unsigned int i; | |
acbadf01 | 2372 | |
3e60f860 JB |
2373 | if (!sta->ht_cap.ht_supported) |
2374 | return 0; | |
acbadf01 | 2375 | |
3e60f860 JB |
2376 | for (i = 0; i < AR9170_NUM_TID; i++) { |
2377 | sta_info->agg[i].state = AR9170_TID_STATE_INVALID; | |
2378 | skb_queue_purge(&sta_info->agg[i].queue); | |
acbadf01 | 2379 | } |
3e60f860 JB |
2380 | |
2381 | return 0; | |
e9348cdd CL |
2382 | } |
2383 | ||
2384 | static int ar9170_get_stats(struct ieee80211_hw *hw, | |
2385 | struct ieee80211_low_level_stats *stats) | |
2386 | { | |
2387 | struct ar9170 *ar = hw->priv; | |
2388 | u32 val; | |
2389 | int err; | |
2390 | ||
2391 | mutex_lock(&ar->mutex); | |
2392 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val); | |
2393 | ar->stats.dot11ACKFailureCount += val; | |
2394 | ||
2395 | memcpy(stats, &ar->stats, sizeof(*stats)); | |
2396 | mutex_unlock(&ar->mutex); | |
2397 | ||
2398 | return 0; | |
2399 | } | |
2400 | ||
e9348cdd CL |
2401 | static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue, |
2402 | const struct ieee80211_tx_queue_params *param) | |
2403 | { | |
2404 | struct ar9170 *ar = hw->priv; | |
2405 | int ret; | |
2406 | ||
2407 | mutex_lock(&ar->mutex); | |
e9d126cd | 2408 | if (queue < __AR9170_NUM_TXQ) { |
e9348cdd CL |
2409 | memcpy(&ar->edcf[ar9170_qos_hwmap[queue]], |
2410 | param, sizeof(*param)); | |
2411 | ||
2412 | ret = ar9170_set_qos(ar); | |
e9d126cd | 2413 | } else { |
e9348cdd | 2414 | ret = -EINVAL; |
e9d126cd | 2415 | } |
e9348cdd CL |
2416 | |
2417 | mutex_unlock(&ar->mutex); | |
2418 | return ret; | |
2419 | } | |
2420 | ||
9e52b062 | 2421 | static int ar9170_ampdu_action(struct ieee80211_hw *hw, |
c951ad35 | 2422 | struct ieee80211_vif *vif, |
9e52b062 JB |
2423 | enum ieee80211_ampdu_mlme_action action, |
2424 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) | |
2425 | { | |
acbadf01 CL |
2426 | struct ar9170 *ar = hw->priv; |
2427 | struct ar9170_sta_info *sta_info = (void *) sta->drv_priv; | |
2428 | struct ar9170_sta_tid *tid_info = &sta_info->agg[tid]; | |
2429 | unsigned long flags; | |
2430 | ||
2431 | if (!modparam_ht) | |
2432 | return -EOPNOTSUPP; | |
2433 | ||
9e52b062 | 2434 | switch (action) { |
acbadf01 CL |
2435 | case IEEE80211_AMPDU_TX_START: |
2436 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
2437 | if (tid_info->state != AR9170_TID_STATE_SHUTDOWN || | |
2438 | !list_empty(&tid_info->list)) { | |
2439 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
2440 | #ifdef AR9170_TXAGG_DEBUG | |
2441 | printk(KERN_INFO "%s: A-MPDU [ESS:[%pM] tid:[%d]] " | |
2442 | "is in a very bad state!\n", | |
2443 | wiphy_name(hw->wiphy), sta->addr, tid); | |
2444 | #endif /* AR9170_TXAGG_DEBUG */ | |
2445 | return -EBUSY; | |
2446 | } | |
2447 | ||
2448 | *ssn = tid_info->ssn; | |
2449 | tid_info->state = AR9170_TID_STATE_PROGRESS; | |
2450 | tid_info->active = false; | |
2451 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
c951ad35 | 2452 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
acbadf01 CL |
2453 | break; |
2454 | ||
2455 | case IEEE80211_AMPDU_TX_STOP: | |
2456 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
2457 | tid_info->state = AR9170_TID_STATE_SHUTDOWN; | |
2458 | list_del_init(&tid_info->list); | |
2459 | tid_info->active = false; | |
2460 | skb_queue_purge(&tid_info->queue); | |
2461 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
c951ad35 | 2462 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
acbadf01 CL |
2463 | break; |
2464 | ||
2465 | case IEEE80211_AMPDU_TX_OPERATIONAL: | |
2466 | #ifdef AR9170_TXAGG_DEBUG | |
2467 | printk(KERN_INFO "%s: A-MPDU for %pM [tid:%d] Operational.\n", | |
2468 | wiphy_name(hw->wiphy), sta->addr, tid); | |
2469 | #endif /* AR9170_TXAGG_DEBUG */ | |
2470 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
2471 | sta_info->agg[tid].state = AR9170_TID_STATE_COMPLETE; | |
2472 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
2473 | break; | |
2474 | ||
9e52b062 JB |
2475 | case IEEE80211_AMPDU_RX_START: |
2476 | case IEEE80211_AMPDU_RX_STOP: | |
acbadf01 CL |
2477 | /* Handled by firmware */ |
2478 | break; | |
2479 | ||
9e52b062 JB |
2480 | default: |
2481 | return -EOPNOTSUPP; | |
2482 | } | |
acbadf01 CL |
2483 | |
2484 | return 0; | |
9e52b062 JB |
2485 | } |
2486 | ||
e9348cdd CL |
2487 | static const struct ieee80211_ops ar9170_ops = { |
2488 | .start = ar9170_op_start, | |
2489 | .stop = ar9170_op_stop, | |
2490 | .tx = ar9170_op_tx, | |
2491 | .add_interface = ar9170_op_add_interface, | |
2492 | .remove_interface = ar9170_op_remove_interface, | |
2493 | .config = ar9170_op_config, | |
3ac64bee | 2494 | .prepare_multicast = ar9170_op_prepare_multicast, |
e9348cdd CL |
2495 | .configure_filter = ar9170_op_configure_filter, |
2496 | .conf_tx = ar9170_conf_tx, | |
2497 | .bss_info_changed = ar9170_op_bss_info_changed, | |
2498 | .get_tsf = ar9170_op_get_tsf, | |
2499 | .set_key = ar9170_set_key, | |
3e60f860 JB |
2500 | .sta_add = ar9170_sta_add, |
2501 | .sta_remove = ar9170_sta_remove, | |
e9348cdd | 2502 | .get_stats = ar9170_get_stats, |
9e52b062 | 2503 | .ampdu_action = ar9170_ampdu_action, |
e9348cdd CL |
2504 | }; |
2505 | ||
2506 | void *ar9170_alloc(size_t priv_size) | |
2507 | { | |
2508 | struct ieee80211_hw *hw; | |
2509 | struct ar9170 *ar; | |
cca84799 | 2510 | struct sk_buff *skb; |
e9348cdd CL |
2511 | int i; |
2512 | ||
cca84799 CL |
2513 | /* |
2514 | * this buffer is used for rx stream reconstruction. | |
2515 | * Under heavy load this device (or the transport layer?) | |
3ad2f3fb | 2516 | * tends to split the streams into separate rx descriptors. |
cca84799 CL |
2517 | */ |
2518 | ||
2519 | skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL); | |
2520 | if (!skb) | |
2521 | goto err_nomem; | |
2522 | ||
e9348cdd CL |
2523 | hw = ieee80211_alloc_hw(priv_size, &ar9170_ops); |
2524 | if (!hw) | |
cca84799 | 2525 | goto err_nomem; |
e9348cdd CL |
2526 | |
2527 | ar = hw->priv; | |
2528 | ar->hw = hw; | |
cca84799 | 2529 | ar->rx_failover = skb; |
e9348cdd CL |
2530 | |
2531 | mutex_init(&ar->mutex); | |
2532 | spin_lock_init(&ar->cmdlock); | |
2533 | spin_lock_init(&ar->tx_stats_lock); | |
acbadf01 CL |
2534 | spin_lock_init(&ar->tx_ampdu_list_lock); |
2535 | skb_queue_head_init(&ar->tx_status_ampdu); | |
9b9c5aae CL |
2536 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { |
2537 | skb_queue_head_init(&ar->tx_status[i]); | |
2538 | skb_queue_head_init(&ar->tx_pending[i]); | |
2539 | } | |
cca84799 | 2540 | ar9170_rx_reset_rx_mpdu(ar); |
e9348cdd | 2541 | INIT_WORK(&ar->beacon_work, ar9170_new_beacon); |
9b9c5aae | 2542 | INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor); |
acbadf01 | 2543 | INIT_LIST_HEAD(&ar->tx_ampdu_list); |
e9348cdd CL |
2544 | |
2545 | /* all hw supports 2.4 GHz, so set channel to 1 by default */ | |
2546 | ar->channel = &ar9170_2ghz_chantable[0]; | |
2547 | ||
2548 | /* first part of wiphy init */ | |
2549 | ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | | |
2550 | BIT(NL80211_IFTYPE_WDS) | | |
2551 | BIT(NL80211_IFTYPE_ADHOC); | |
2552 | ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS | | |
2553 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | | |
2554 | IEEE80211_HW_SIGNAL_DBM | | |
2555 | IEEE80211_HW_NOISE_DBM; | |
2556 | ||
acbadf01 CL |
2557 | if (modparam_ht) { |
2558 | ar->hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION; | |
2559 | } else { | |
2560 | ar9170_band_2GHz.ht_cap.ht_supported = false; | |
2561 | ar9170_band_5GHz.ht_cap.ht_supported = false; | |
2562 | } | |
2563 | ||
4a48e2a4 | 2564 | ar->hw->queues = __AR9170_NUM_TXQ; |
e9348cdd CL |
2565 | ar->hw->extra_tx_headroom = 8; |
2566 | ar->hw->sta_data_size = sizeof(struct ar9170_sta_info); | |
2567 | ||
2568 | ar->hw->max_rates = 1; | |
2569 | ar->hw->max_rate_tries = 3; | |
2570 | ||
2571 | for (i = 0; i < ARRAY_SIZE(ar->noise); i++) | |
2572 | ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ | |
2573 | ||
2574 | return ar; | |
cca84799 CL |
2575 | |
2576 | err_nomem: | |
2577 | kfree_skb(skb); | |
2578 | return ERR_PTR(-ENOMEM); | |
e9348cdd | 2579 | } |
e9348cdd CL |
2580 | |
2581 | static int ar9170_read_eeprom(struct ar9170 *ar) | |
2582 | { | |
2583 | #define RW 8 /* number of words to read at once */ | |
2584 | #define RB (sizeof(u32) * RW) | |
608b88cb | 2585 | struct ath_regulatory *regulatory = &ar->common.regulatory; |
e9348cdd CL |
2586 | u8 *eeprom = (void *)&ar->eeprom; |
2587 | u8 *addr = ar->eeprom.mac_address; | |
2588 | __le32 offsets[RW]; | |
acbadf01 | 2589 | unsigned int rx_streams, tx_streams, tx_params = 0; |
e9348cdd CL |
2590 | int i, j, err, bands = 0; |
2591 | ||
2592 | BUILD_BUG_ON(sizeof(ar->eeprom) & 3); | |
2593 | ||
2594 | BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4); | |
2595 | #ifndef __CHECKER__ | |
2596 | /* don't want to handle trailing remains */ | |
2597 | BUILD_BUG_ON(sizeof(ar->eeprom) % RB); | |
2598 | #endif | |
2599 | ||
2600 | for (i = 0; i < sizeof(ar->eeprom)/RB; i++) { | |
2601 | for (j = 0; j < RW; j++) | |
2602 | offsets[j] = cpu_to_le32(AR9170_EEPROM_START + | |
2603 | RB * i + 4 * j); | |
2604 | ||
2605 | err = ar->exec_cmd(ar, AR9170_CMD_RREG, | |
2606 | RB, (u8 *) &offsets, | |
2607 | RB, eeprom + RB * i); | |
2608 | if (err) | |
2609 | return err; | |
2610 | } | |
2611 | ||
2612 | #undef RW | |
2613 | #undef RB | |
2614 | ||
2615 | if (ar->eeprom.length == cpu_to_le16(0xFFFF)) | |
2616 | return -ENODATA; | |
2617 | ||
2618 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { | |
2619 | ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz; | |
2620 | bands++; | |
2621 | } | |
2622 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { | |
2623 | ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz; | |
2624 | bands++; | |
2625 | } | |
acbadf01 CL |
2626 | |
2627 | rx_streams = hweight8(ar->eeprom.rx_mask); | |
2628 | tx_streams = hweight8(ar->eeprom.tx_mask); | |
2629 | ||
2630 | if (rx_streams != tx_streams) | |
2631 | tx_params = IEEE80211_HT_MCS_TX_RX_DIFF; | |
2632 | ||
2633 | if (tx_streams >= 1 && tx_streams <= IEEE80211_HT_MCS_TX_MAX_STREAMS) | |
2634 | tx_params = (tx_streams - 1) << | |
2635 | IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; | |
2636 | ||
2637 | ar9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params; | |
2638 | ar9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params; | |
2639 | ||
e9348cdd CL |
2640 | /* |
2641 | * I measured this, a bandswitch takes roughly | |
2642 | * 135 ms and a frequency switch about 80. | |
2643 | * | |
2644 | * FIXME: measure these values again once EEPROM settings | |
2645 | * are used, that will influence them! | |
2646 | */ | |
2647 | if (bands == 2) | |
2648 | ar->hw->channel_change_time = 135 * 1000; | |
2649 | else | |
2650 | ar->hw->channel_change_time = 80 * 1000; | |
2651 | ||
608b88cb LR |
2652 | regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); |
2653 | regulatory->current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]); | |
1878f77e | 2654 | |
e9348cdd CL |
2655 | /* second part of wiphy init */ |
2656 | SET_IEEE80211_PERM_ADDR(ar->hw, addr); | |
2657 | ||
2658 | return bands ? 0 : -EINVAL; | |
2659 | } | |
2660 | ||
1878f77e CL |
2661 | static int ar9170_reg_notifier(struct wiphy *wiphy, |
2662 | struct regulatory_request *request) | |
2663 | { | |
2664 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); | |
2665 | struct ar9170 *ar = hw->priv; | |
2666 | ||
608b88cb | 2667 | return ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory); |
1878f77e CL |
2668 | } |
2669 | ||
e9348cdd CL |
2670 | int ar9170_register(struct ar9170 *ar, struct device *pdev) |
2671 | { | |
608b88cb | 2672 | struct ath_regulatory *regulatory = &ar->common.regulatory; |
e9348cdd CL |
2673 | int err; |
2674 | ||
2675 | /* try to read EEPROM, init MAC addr */ | |
2676 | err = ar9170_read_eeprom(ar); | |
2677 | if (err) | |
2678 | goto err_out; | |
2679 | ||
608b88cb | 2680 | err = ath_regd_init(regulatory, ar->hw->wiphy, |
1878f77e | 2681 | ar9170_reg_notifier); |
85efc86e LR |
2682 | if (err) |
2683 | goto err_out; | |
1878f77e | 2684 | |
e9348cdd CL |
2685 | err = ieee80211_register_hw(ar->hw); |
2686 | if (err) | |
2687 | goto err_out; | |
2688 | ||
608b88cb LR |
2689 | if (!ath_is_world_regd(regulatory)) |
2690 | regulatory_hint(ar->hw->wiphy, regulatory->alpha2); | |
1878f77e | 2691 | |
e9348cdd CL |
2692 | err = ar9170_init_leds(ar); |
2693 | if (err) | |
2694 | goto err_unreg; | |
2695 | ||
2696 | #ifdef CONFIG_AR9170_LEDS | |
2697 | err = ar9170_register_leds(ar); | |
2698 | if (err) | |
2699 | goto err_unreg; | |
2700 | #endif /* CONFIG_AR9170_LEDS */ | |
2701 | ||
2702 | dev_info(pdev, "Atheros AR9170 is registered as '%s'\n", | |
2703 | wiphy_name(ar->hw->wiphy)); | |
2704 | ||
53576517 JB |
2705 | ar->registered = true; |
2706 | return 0; | |
e9348cdd CL |
2707 | |
2708 | err_unreg: | |
2709 | ieee80211_unregister_hw(ar->hw); | |
2710 | ||
2711 | err_out: | |
2712 | return err; | |
2713 | } | |
e9348cdd CL |
2714 | |
2715 | void ar9170_unregister(struct ar9170 *ar) | |
2716 | { | |
53576517 | 2717 | if (ar->registered) { |
e9348cdd | 2718 | #ifdef CONFIG_AR9170_LEDS |
53576517 | 2719 | ar9170_unregister_leds(ar); |
e9348cdd CL |
2720 | #endif /* CONFIG_AR9170_LEDS */ |
2721 | ||
2722 | ieee80211_unregister_hw(ar->hw); | |
53576517 JB |
2723 | } |
2724 | ||
2725 | kfree_skb(ar->rx_failover); | |
e9348cdd CL |
2726 | mutex_destroy(&ar->mutex); |
2727 | } |