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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 CL |
40 | #include <linux/init.h> |
41 | #include <linux/module.h> | |
42 | #include <linux/etherdevice.h> | |
43 | #include <net/mac80211.h> | |
44 | #include "ar9170.h" | |
45 | #include "hw.h" | |
46 | #include "cmd.h" | |
47 | ||
48 | static int modparam_nohwcrypt; | |
49 | module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); | |
50 | MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); | |
e9348cdd | 51 | |
acbadf01 CL |
52 | static int modparam_ht; |
53 | module_param_named(ht, modparam_ht, bool, S_IRUGO); | |
54 | MODULE_PARM_DESC(ht, "enable MPDU aggregation."); | |
55 | ||
e9348cdd CL |
56 | #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \ |
57 | .bitrate = (_bitrate), \ | |
58 | .flags = (_flags), \ | |
59 | .hw_value = (_hw_rate) | (_txpidx) << 4, \ | |
60 | } | |
61 | ||
62 | static struct ieee80211_rate __ar9170_ratetable[] = { | |
63 | RATE(10, 0, 0, 0), | |
64 | RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE), | |
65 | RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE), | |
66 | RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE), | |
67 | RATE(60, 0xb, 0, 0), | |
68 | RATE(90, 0xf, 0, 0), | |
69 | RATE(120, 0xa, 0, 0), | |
70 | RATE(180, 0xe, 0, 0), | |
71 | RATE(240, 0x9, 0, 0), | |
72 | RATE(360, 0xd, 1, 0), | |
73 | RATE(480, 0x8, 2, 0), | |
74 | RATE(540, 0xc, 3, 0), | |
75 | }; | |
76 | #undef RATE | |
77 | ||
78 | #define ar9170_g_ratetable (__ar9170_ratetable + 0) | |
79 | #define ar9170_g_ratetable_size 12 | |
80 | #define ar9170_a_ratetable (__ar9170_ratetable + 4) | |
81 | #define ar9170_a_ratetable_size 8 | |
82 | ||
83 | /* | |
84 | * NB: The hw_value is used as an index into the ar9170_phy_freq_params | |
85 | * array in phy.c so that we don't have to do frequency lookups! | |
86 | */ | |
87 | #define CHAN(_freq, _idx) { \ | |
88 | .center_freq = (_freq), \ | |
89 | .hw_value = (_idx), \ | |
90 | .max_power = 18, /* XXX */ \ | |
91 | } | |
92 | ||
93 | static struct ieee80211_channel ar9170_2ghz_chantable[] = { | |
94 | CHAN(2412, 0), | |
95 | CHAN(2417, 1), | |
96 | CHAN(2422, 2), | |
97 | CHAN(2427, 3), | |
98 | CHAN(2432, 4), | |
99 | CHAN(2437, 5), | |
100 | CHAN(2442, 6), | |
101 | CHAN(2447, 7), | |
102 | CHAN(2452, 8), | |
103 | CHAN(2457, 9), | |
104 | CHAN(2462, 10), | |
105 | CHAN(2467, 11), | |
106 | CHAN(2472, 12), | |
107 | CHAN(2484, 13), | |
108 | }; | |
109 | ||
110 | static struct ieee80211_channel ar9170_5ghz_chantable[] = { | |
111 | CHAN(4920, 14), | |
112 | CHAN(4940, 15), | |
113 | CHAN(4960, 16), | |
114 | CHAN(4980, 17), | |
115 | CHAN(5040, 18), | |
116 | CHAN(5060, 19), | |
117 | CHAN(5080, 20), | |
118 | CHAN(5180, 21), | |
119 | CHAN(5200, 22), | |
120 | CHAN(5220, 23), | |
121 | CHAN(5240, 24), | |
122 | CHAN(5260, 25), | |
123 | CHAN(5280, 26), | |
124 | CHAN(5300, 27), | |
125 | CHAN(5320, 28), | |
126 | CHAN(5500, 29), | |
127 | CHAN(5520, 30), | |
128 | CHAN(5540, 31), | |
129 | CHAN(5560, 32), | |
130 | CHAN(5580, 33), | |
131 | CHAN(5600, 34), | |
132 | CHAN(5620, 35), | |
133 | CHAN(5640, 36), | |
134 | CHAN(5660, 37), | |
135 | CHAN(5680, 38), | |
136 | CHAN(5700, 39), | |
137 | CHAN(5745, 40), | |
138 | CHAN(5765, 41), | |
139 | CHAN(5785, 42), | |
140 | CHAN(5805, 43), | |
141 | CHAN(5825, 44), | |
142 | CHAN(5170, 45), | |
143 | CHAN(5190, 46), | |
144 | CHAN(5210, 47), | |
145 | CHAN(5230, 48), | |
146 | }; | |
147 | #undef CHAN | |
148 | ||
9e52b062 JB |
149 | #define AR9170_HT_CAP \ |
150 | { \ | |
151 | .ht_supported = true, \ | |
152 | .cap = IEEE80211_HT_CAP_MAX_AMSDU | \ | |
9e52b062 JB |
153 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \ |
154 | IEEE80211_HT_CAP_SGI_40 | \ | |
acbadf01 | 155 | IEEE80211_HT_CAP_GRN_FLD | \ |
9e52b062 JB |
156 | IEEE80211_HT_CAP_DSSSCCK40 | \ |
157 | IEEE80211_HT_CAP_SM_PS, \ | |
083c4687 CL |
158 | .ampdu_factor = 3, \ |
159 | .ampdu_density = 6, \ | |
9e52b062 | 160 | .mcs = { \ |
acbadf01 CL |
161 | .rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \ |
162 | .rx_highest = cpu_to_le16(300), \ | |
163 | .tx_params = IEEE80211_HT_MCS_TX_DEFINED, \ | |
9e52b062 JB |
164 | }, \ |
165 | } | |
166 | ||
e9348cdd CL |
167 | static struct ieee80211_supported_band ar9170_band_2GHz = { |
168 | .channels = ar9170_2ghz_chantable, | |
169 | .n_channels = ARRAY_SIZE(ar9170_2ghz_chantable), | |
170 | .bitrates = ar9170_g_ratetable, | |
171 | .n_bitrates = ar9170_g_ratetable_size, | |
9e52b062 JB |
172 | .ht_cap = AR9170_HT_CAP, |
173 | }; | |
174 | ||
175 | static struct ieee80211_supported_band ar9170_band_5GHz = { | |
176 | .channels = ar9170_5ghz_chantable, | |
177 | .n_channels = ARRAY_SIZE(ar9170_5ghz_chantable), | |
178 | .bitrates = ar9170_a_ratetable, | |
179 | .n_bitrates = ar9170_a_ratetable_size, | |
180 | .ht_cap = AR9170_HT_CAP, | |
e9348cdd CL |
181 | }; |
182 | ||
9b9c5aae | 183 | static void ar9170_tx(struct ar9170 *ar); |
acbadf01 | 184 | static bool ar9170_tx_ampdu(struct ar9170 *ar); |
e9348cdd | 185 | |
acbadf01 CL |
186 | static inline u16 ar9170_get_seq_h(struct ieee80211_hdr *hdr) |
187 | { | |
188 | return le16_to_cpu(hdr->seq_ctrl) >> 4; | |
189 | } | |
190 | ||
191 | static inline u16 ar9170_get_seq(struct sk_buff *skb) | |
192 | { | |
193 | struct ar9170_tx_control *txc = (void *) skb->data; | |
194 | return ar9170_get_seq_h((void *) txc->frame_data); | |
195 | } | |
196 | ||
197 | static inline u16 ar9170_get_tid(struct sk_buff *skb) | |
198 | { | |
199 | struct ar9170_tx_control *txc = (void *) skb->data; | |
200 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
201 | ||
202 | return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK; | |
203 | } | |
204 | ||
205 | #define GET_NEXT_SEQ(seq) ((seq + 1) & 0x0fff) | |
206 | #define GET_NEXT_SEQ_FROM_SKB(skb) (GET_NEXT_SEQ(ar9170_get_seq(skb))) | |
207 | ||
208 | #if (defined AR9170_QUEUE_DEBUG) || (defined AR9170_TXAGG_DEBUG) | |
e9348cdd CL |
209 | static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb) |
210 | { | |
211 | struct ar9170_tx_control *txc = (void *) skb->data; | |
9b9c5aae CL |
212 | struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); |
213 | struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data; | |
214 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
e9348cdd | 215 | |
acbadf01 | 216 | printk(KERN_DEBUG "%s: => FRAME [skb:%p, q:%d, DA:[%pM] flags:%x s:%d " |
9b9c5aae | 217 | "mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n", |
e9348cdd | 218 | wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb), |
acbadf01 | 219 | ieee80211_get_DA(hdr), arinfo->flags, ar9170_get_seq_h(hdr), |
9b9c5aae CL |
220 | le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control), |
221 | jiffies_to_msecs(arinfo->timeout - jiffies)); | |
e9348cdd CL |
222 | } |
223 | ||
9b9c5aae CL |
224 | static void __ar9170_dump_txqueue(struct ar9170 *ar, |
225 | struct sk_buff_head *queue) | |
e9348cdd CL |
226 | { |
227 | struct sk_buff *skb; | |
228 | int i = 0; | |
229 | ||
230 | printk(KERN_DEBUG "---[ cut here ]---\n"); | |
9b9c5aae | 231 | printk(KERN_DEBUG "%s: %d entries in queue.\n", |
e9348cdd CL |
232 | wiphy_name(ar->hw->wiphy), skb_queue_len(queue)); |
233 | ||
234 | skb_queue_walk(queue, skb) { | |
9b9c5aae | 235 | printk(KERN_DEBUG "index:%d => \n", i++); |
e9348cdd CL |
236 | ar9170_print_txheader(ar, skb); |
237 | } | |
9b9c5aae CL |
238 | if (i != skb_queue_len(queue)) |
239 | printk(KERN_DEBUG "WARNING: queue frame counter " | |
240 | "mismatch %d != %d\n", skb_queue_len(queue), i); | |
e9348cdd CL |
241 | printk(KERN_DEBUG "---[ end ]---\n"); |
242 | } | |
acbadf01 | 243 | #endif /* AR9170_QUEUE_DEBUG || AR9170_TXAGG_DEBUG */ |
e9348cdd | 244 | |
acbadf01 | 245 | #ifdef AR9170_QUEUE_DEBUG |
9b9c5aae CL |
246 | static void ar9170_dump_txqueue(struct ar9170 *ar, |
247 | struct sk_buff_head *queue) | |
248 | { | |
249 | unsigned long flags; | |
250 | ||
251 | spin_lock_irqsave(&queue->lock, flags); | |
252 | __ar9170_dump_txqueue(ar, queue); | |
253 | spin_unlock_irqrestore(&queue->lock, flags); | |
254 | } | |
acbadf01 | 255 | #endif /* AR9170_QUEUE_DEBUG */ |
9b9c5aae | 256 | |
acbadf01 | 257 | #ifdef AR9170_QUEUE_STOP_DEBUG |
9b9c5aae CL |
258 | static void __ar9170_dump_txstats(struct ar9170 *ar) |
259 | { | |
260 | int i; | |
261 | ||
262 | printk(KERN_DEBUG "%s: QoS queue stats\n", | |
263 | wiphy_name(ar->hw->wiphy)); | |
264 | ||
265 | for (i = 0; i < __AR9170_NUM_TXQ; i++) | |
acbadf01 CL |
266 | printk(KERN_DEBUG "%s: queue:%d limit:%d len:%d waitack:%d " |
267 | " stopped:%d\n", wiphy_name(ar->hw->wiphy), i, | |
268 | ar->tx_stats[i].limit, ar->tx_stats[i].len, | |
269 | skb_queue_len(&ar->tx_status[i]), | |
270 | ieee80211_queue_stopped(ar->hw, i)); | |
9b9c5aae | 271 | } |
acbadf01 | 272 | #endif /* AR9170_QUEUE_STOP_DEBUG */ |
9b9c5aae | 273 | |
acbadf01 CL |
274 | #ifdef AR9170_TXAGG_DEBUG |
275 | static void ar9170_dump_tx_status_ampdu(struct ar9170 *ar) | |
e9348cdd | 276 | { |
e9348cdd CL |
277 | unsigned long flags; |
278 | ||
acbadf01 CL |
279 | spin_lock_irqsave(&ar->tx_status_ampdu.lock, flags); |
280 | printk(KERN_DEBUG "%s: A-MPDU tx_status queue => \n", | |
281 | wiphy_name(ar->hw->wiphy)); | |
282 | __ar9170_dump_txqueue(ar, &ar->tx_status_ampdu); | |
283 | spin_unlock_irqrestore(&ar->tx_status_ampdu.lock, flags); | |
9b9c5aae | 284 | } |
acbadf01 CL |
285 | |
286 | #endif /* AR9170_TXAGG_DEBUG */ | |
9b9c5aae CL |
287 | |
288 | /* caller must guarantee exclusive access for _bin_ queue. */ | |
289 | static void ar9170_recycle_expired(struct ar9170 *ar, | |
290 | struct sk_buff_head *queue, | |
291 | struct sk_buff_head *bin) | |
292 | { | |
293 | struct sk_buff *skb, *old = NULL; | |
294 | unsigned long flags; | |
295 | ||
296 | spin_lock_irqsave(&queue->lock, flags); | |
297 | while ((skb = skb_peek(queue))) { | |
298 | struct ieee80211_tx_info *txinfo; | |
299 | struct ar9170_tx_info *arinfo; | |
300 | ||
301 | txinfo = IEEE80211_SKB_CB(skb); | |
302 | arinfo = (void *) txinfo->rate_driver_data; | |
303 | ||
304 | if (time_is_before_jiffies(arinfo->timeout)) { | |
305 | #ifdef AR9170_QUEUE_DEBUG | |
306 | printk(KERN_DEBUG "%s: [%ld > %ld] frame expired => " | |
307 | "recycle \n", wiphy_name(ar->hw->wiphy), | |
308 | jiffies, arinfo->timeout); | |
309 | ar9170_print_txheader(ar, skb); | |
310 | #endif /* AR9170_QUEUE_DEBUG */ | |
311 | __skb_unlink(skb, queue); | |
312 | __skb_queue_tail(bin, skb); | |
313 | } else { | |
314 | break; | |
315 | } | |
316 | ||
317 | if (unlikely(old == skb)) { | |
318 | /* bail out - queue is shot. */ | |
319 | ||
320 | WARN_ON(1); | |
321 | break; | |
322 | } | |
323 | old = skb; | |
324 | } | |
325 | spin_unlock_irqrestore(&queue->lock, flags); | |
326 | } | |
327 | ||
328 | static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb, | |
329 | u16 tx_status) | |
330 | { | |
331 | struct ieee80211_tx_info *txinfo; | |
332 | unsigned int retries = 0; | |
e9348cdd CL |
333 | |
334 | txinfo = IEEE80211_SKB_CB(skb); | |
335 | ieee80211_tx_info_clear_status(txinfo); | |
336 | ||
337 | switch (tx_status) { | |
338 | case AR9170_TX_STATUS_RETRY: | |
339 | retries = 2; | |
340 | case AR9170_TX_STATUS_COMPLETE: | |
341 | txinfo->flags |= IEEE80211_TX_STAT_ACK; | |
342 | break; | |
343 | ||
344 | case AR9170_TX_STATUS_FAILED: | |
345 | retries = ar->hw->conf.long_frame_max_tx_count; | |
346 | break; | |
347 | ||
348 | default: | |
349 | printk(KERN_ERR "%s: invalid tx_status response (%x).\n", | |
350 | wiphy_name(ar->hw->wiphy), tx_status); | |
351 | break; | |
352 | } | |
353 | ||
9b9c5aae | 354 | txinfo->status.rates[0].count = retries + 1; |
e9348cdd CL |
355 | skb_pull(skb, sizeof(struct ar9170_tx_control)); |
356 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
357 | } | |
e9348cdd | 358 | |
acbadf01 CL |
359 | static void ar9170_tx_fake_ampdu_status(struct ar9170 *ar) |
360 | { | |
361 | struct sk_buff_head success; | |
362 | struct sk_buff *skb; | |
363 | unsigned int i; | |
364 | unsigned long queue_bitmap = 0; | |
365 | ||
366 | skb_queue_head_init(&success); | |
367 | ||
368 | while (skb_queue_len(&ar->tx_status_ampdu) > AR9170_NUM_TX_STATUS) | |
369 | __skb_queue_tail(&success, skb_dequeue(&ar->tx_status_ampdu)); | |
370 | ||
371 | ar9170_recycle_expired(ar, &ar->tx_status_ampdu, &success); | |
372 | ||
373 | #ifdef AR9170_TXAGG_DEBUG | |
374 | printk(KERN_DEBUG "%s: collected %d A-MPDU frames.\n", | |
375 | wiphy_name(ar->hw->wiphy), skb_queue_len(&success)); | |
376 | __ar9170_dump_txqueue(ar, &success); | |
377 | #endif /* AR9170_TXAGG_DEBUG */ | |
378 | ||
379 | while ((skb = __skb_dequeue(&success))) { | |
380 | struct ieee80211_tx_info *txinfo; | |
381 | ||
382 | queue_bitmap |= BIT(skb_get_queue_mapping(skb)); | |
383 | ||
384 | txinfo = IEEE80211_SKB_CB(skb); | |
385 | ieee80211_tx_info_clear_status(txinfo); | |
386 | ||
387 | txinfo->flags |= IEEE80211_TX_STAT_ACK; | |
388 | txinfo->status.rates[0].count = 1; | |
389 | ||
390 | skb_pull(skb, sizeof(struct ar9170_tx_control)); | |
391 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
392 | } | |
393 | ||
394 | for_each_bit(i, &queue_bitmap, BITS_PER_BYTE) { | |
395 | #ifdef AR9170_QUEUE_STOP_DEBUG | |
396 | printk(KERN_DEBUG "%s: wake queue %d\n", | |
397 | wiphy_name(ar->hw->wiphy), i); | |
398 | __ar9170_dump_txstats(ar); | |
399 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
400 | ieee80211_wake_queue(ar->hw, i); | |
401 | } | |
402 | ||
403 | if (queue_bitmap) | |
404 | ar9170_tx(ar); | |
405 | } | |
406 | ||
407 | static void ar9170_tx_ampdu_callback(struct ar9170 *ar, struct sk_buff *skb) | |
408 | { | |
409 | struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); | |
410 | struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data; | |
411 | ||
412 | arinfo->timeout = jiffies + | |
413 | msecs_to_jiffies(AR9170_BA_TIMEOUT); | |
414 | ||
415 | skb_queue_tail(&ar->tx_status_ampdu, skb); | |
416 | ar9170_tx_fake_ampdu_status(ar); | |
417 | ar->tx_ampdu_pending--; | |
418 | ||
419 | if (!list_empty(&ar->tx_ampdu_list) && !ar->tx_ampdu_pending) | |
420 | ar9170_tx_ampdu(ar); | |
421 | } | |
422 | ||
9b9c5aae | 423 | void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb) |
e9348cdd | 424 | { |
9b9c5aae CL |
425 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
426 | struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data; | |
427 | unsigned int queue = skb_get_queue_mapping(skb); | |
e9348cdd | 428 | unsigned long flags; |
e9348cdd | 429 | |
9b9c5aae CL |
430 | spin_lock_irqsave(&ar->tx_stats_lock, flags); |
431 | ar->tx_stats[queue].len--; | |
e9348cdd | 432 | |
9b9c5aae CL |
433 | if (skb_queue_empty(&ar->tx_pending[queue])) { |
434 | #ifdef AR9170_QUEUE_STOP_DEBUG | |
435 | printk(KERN_DEBUG "%s: wake queue %d\n", | |
436 | wiphy_name(ar->hw->wiphy), queue); | |
437 | __ar9170_dump_txstats(ar); | |
438 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
439 | ieee80211_wake_queue(ar->hw, queue); | |
440 | } | |
441 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
e9348cdd | 442 | |
9b9c5aae | 443 | if (arinfo->flags & AR9170_TX_FLAG_BLOCK_ACK) { |
acbadf01 | 444 | ar9170_tx_ampdu_callback(ar, skb); |
9b9c5aae CL |
445 | } else if (arinfo->flags & AR9170_TX_FLAG_WAIT_FOR_ACK) { |
446 | arinfo->timeout = jiffies + | |
447 | msecs_to_jiffies(AR9170_TX_TIMEOUT); | |
448 | ||
449 | skb_queue_tail(&ar->tx_status[queue], skb); | |
450 | } else if (arinfo->flags & AR9170_TX_FLAG_NO_ACK) { | |
451 | ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED); | |
452 | } else { | |
453 | #ifdef AR9170_QUEUE_DEBUG | |
454 | printk(KERN_DEBUG "%s: unsupported frame flags!\n", | |
455 | wiphy_name(ar->hw->wiphy)); | |
456 | ar9170_print_txheader(ar, skb); | |
457 | #endif /* AR9170_QUEUE_DEBUG */ | |
458 | dev_kfree_skb_any(skb); | |
459 | } | |
460 | ||
461 | if (!ar->tx_stats[queue].len && | |
462 | !skb_queue_empty(&ar->tx_pending[queue])) { | |
463 | ar9170_tx(ar); | |
e9348cdd | 464 | } |
e9348cdd CL |
465 | } |
466 | ||
9b9c5aae CL |
467 | static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar, |
468 | const u8 *mac, | |
469 | struct sk_buff_head *queue, | |
470 | const u32 rate) | |
e9348cdd | 471 | { |
9b9c5aae | 472 | unsigned long flags; |
e9348cdd CL |
473 | struct sk_buff *skb; |
474 | ||
475 | /* | |
476 | * Unfortunately, the firmware does not tell to which (queued) frame | |
477 | * this transmission status report belongs to. | |
478 | * | |
479 | * So we have to make risky guesses - with the scarce information | |
480 | * the firmware provided (-> destination MAC, and phy_control) - | |
481 | * and hope that we picked the right one... | |
482 | */ | |
e9348cdd | 483 | |
9b9c5aae CL |
484 | spin_lock_irqsave(&queue->lock, flags); |
485 | skb_queue_walk(queue, skb) { | |
486 | struct ar9170_tx_control *txc = (void *) skb->data; | |
487 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
488 | u32 r; | |
489 | ||
490 | if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) { | |
e9348cdd | 491 | #ifdef AR9170_QUEUE_DEBUG |
9b9c5aae CL |
492 | printk(KERN_DEBUG "%s: skip frame => DA %pM != %pM\n", |
493 | wiphy_name(ar->hw->wiphy), mac, | |
494 | ieee80211_get_DA(hdr)); | |
495 | ar9170_print_txheader(ar, skb); | |
496 | #endif /* AR9170_QUEUE_DEBUG */ | |
497 | continue; | |
498 | } | |
499 | ||
500 | r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >> | |
501 | AR9170_TX_PHY_MCS_SHIFT; | |
502 | ||
503 | if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) { | |
504 | #ifdef AR9170_QUEUE_DEBUG | |
505 | printk(KERN_DEBUG "%s: skip frame => rate %d != %d\n", | |
506 | wiphy_name(ar->hw->wiphy), rate, r); | |
507 | ar9170_print_txheader(ar, skb); | |
508 | #endif /* AR9170_QUEUE_DEBUG */ | |
509 | continue; | |
510 | } | |
511 | ||
512 | __skb_unlink(skb, queue); | |
513 | spin_unlock_irqrestore(&queue->lock, flags); | |
514 | return skb; | |
e9348cdd | 515 | } |
9b9c5aae CL |
516 | |
517 | #ifdef AR9170_QUEUE_DEBUG | |
518 | printk(KERN_ERR "%s: ESS:[%pM] does not have any " | |
519 | "outstanding frames in queue.\n", | |
520 | wiphy_name(ar->hw->wiphy), mac); | |
521 | __ar9170_dump_txqueue(ar, queue); | |
e9348cdd | 522 | #endif /* AR9170_QUEUE_DEBUG */ |
9b9c5aae CL |
523 | spin_unlock_irqrestore(&queue->lock, flags); |
524 | ||
525 | return NULL; | |
e9348cdd CL |
526 | } |
527 | ||
acbadf01 CL |
528 | static void ar9170_handle_block_ack(struct ar9170 *ar, u16 count, u16 r) |
529 | { | |
530 | struct sk_buff *skb; | |
531 | struct ieee80211_tx_info *txinfo; | |
532 | ||
533 | while (count) { | |
534 | skb = ar9170_get_queued_skb(ar, NULL, &ar->tx_status_ampdu, r); | |
535 | if (!skb) | |
536 | break; | |
537 | ||
538 | txinfo = IEEE80211_SKB_CB(skb); | |
539 | ieee80211_tx_info_clear_status(txinfo); | |
540 | ||
541 | /* FIXME: maybe more ? */ | |
542 | txinfo->status.rates[0].count = 1; | |
543 | ||
544 | skb_pull(skb, sizeof(struct ar9170_tx_control)); | |
545 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
546 | count--; | |
547 | } | |
548 | ||
549 | #ifdef AR9170_TXAGG_DEBUG | |
550 | if (count) { | |
551 | printk(KERN_DEBUG "%s: got %d more failed mpdus, but no more " | |
552 | "suitable frames left in tx_status queue.\n", | |
553 | wiphy_name(ar->hw->wiphy), count); | |
554 | ||
555 | ar9170_dump_tx_status_ampdu(ar); | |
556 | } | |
557 | #endif /* AR9170_TXAGG_DEBUG */ | |
558 | } | |
559 | ||
e9348cdd | 560 | /* |
9b9c5aae CL |
561 | * This worker tries to keeps an maintain tx_status queues. |
562 | * So we can guarantee that incoming tx_status reports are | |
563 | * actually for a pending frame. | |
e9348cdd CL |
564 | */ |
565 | ||
9b9c5aae | 566 | static void ar9170_tx_janitor(struct work_struct *work) |
e9348cdd CL |
567 | { |
568 | struct ar9170 *ar = container_of(work, struct ar9170, | |
9b9c5aae CL |
569 | tx_janitor.work); |
570 | struct sk_buff_head waste; | |
571 | unsigned int i; | |
572 | bool resched = false; | |
e9348cdd | 573 | |
4a48e2a4 CL |
574 | if (unlikely(!IS_STARTED(ar))) |
575 | return ; | |
576 | ||
9b9c5aae CL |
577 | skb_queue_head_init(&waste); |
578 | ||
579 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { | |
e9348cdd | 580 | #ifdef AR9170_QUEUE_DEBUG |
9b9c5aae CL |
581 | printk(KERN_DEBUG "%s: garbage collector scans queue:%d\n", |
582 | wiphy_name(ar->hw->wiphy), i); | |
583 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); | |
584 | ar9170_dump_txqueue(ar, &ar->tx_status[i]); | |
e9348cdd | 585 | #endif /* AR9170_QUEUE_DEBUG */ |
e9348cdd | 586 | |
9b9c5aae CL |
587 | ar9170_recycle_expired(ar, &ar->tx_status[i], &waste); |
588 | ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste); | |
589 | skb_queue_purge(&waste); | |
e9348cdd | 590 | |
9b9c5aae CL |
591 | if (!skb_queue_empty(&ar->tx_status[i]) || |
592 | !skb_queue_empty(&ar->tx_pending[i])) | |
593 | resched = true; | |
e9348cdd CL |
594 | } |
595 | ||
acbadf01 CL |
596 | ar9170_tx_fake_ampdu_status(ar); |
597 | ||
42935eca LR |
598 | if (!resched) |
599 | return; | |
600 | ||
601 | ieee80211_queue_delayed_work(ar->hw, | |
602 | &ar->tx_janitor, | |
603 | msecs_to_jiffies(AR9170_JANITOR_DELAY)); | |
e9348cdd CL |
604 | } |
605 | ||
66d00813 | 606 | void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len) |
e9348cdd CL |
607 | { |
608 | struct ar9170_cmd_response *cmd = (void *) buf; | |
609 | ||
610 | if ((cmd->type & 0xc0) != 0xc0) { | |
611 | ar->callback_cmd(ar, len, buf); | |
612 | return; | |
613 | } | |
614 | ||
615 | /* hardware event handlers */ | |
616 | switch (cmd->type) { | |
617 | case 0xc1: { | |
618 | /* | |
619 | * TX status notification: | |
620 | * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1 | |
621 | * | |
622 | * XX always 81 | |
623 | * YY always 00 | |
624 | * M1-M6 is the MAC address | |
625 | * R1-R4 is the transmit rate | |
626 | * S1-S2 is the transmit status | |
627 | */ | |
628 | ||
629 | struct sk_buff *skb; | |
9b9c5aae CL |
630 | u32 phy = le32_to_cpu(cmd->tx_status.rate); |
631 | u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >> | |
632 | AR9170_TX_PHY_QOS_SHIFT; | |
633 | #ifdef AR9170_QUEUE_DEBUG | |
634 | printk(KERN_DEBUG "%s: recv tx_status for %pM, p:%08x, q:%d\n", | |
635 | wiphy_name(ar->hw->wiphy), cmd->tx_status.dst, phy, q); | |
636 | #endif /* AR9170_QUEUE_DEBUG */ | |
e9348cdd | 637 | |
9b9c5aae CL |
638 | skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst, |
639 | &ar->tx_status[q], | |
640 | AR9170_TX_INVALID_RATE); | |
e9348cdd CL |
641 | if (unlikely(!skb)) |
642 | return ; | |
643 | ||
9b9c5aae | 644 | ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status)); |
e9348cdd CL |
645 | break; |
646 | } | |
647 | ||
648 | case 0xc0: | |
649 | /* | |
650 | * pre-TBTT event | |
651 | */ | |
652 | if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP) | |
42935eca | 653 | ieee80211_queue_work(ar->hw, &ar->beacon_work); |
e9348cdd CL |
654 | break; |
655 | ||
656 | case 0xc2: | |
657 | /* | |
658 | * (IBSS) beacon send notification | |
659 | * bytes: 04 c2 XX YY B4 B3 B2 B1 | |
660 | * | |
661 | * XX always 80 | |
662 | * YY always 00 | |
663 | * B1-B4 "should" be the number of send out beacons. | |
664 | */ | |
665 | break; | |
666 | ||
667 | case 0xc3: | |
668 | /* End of Atim Window */ | |
669 | break; | |
670 | ||
671 | case 0xc4: | |
acbadf01 CL |
672 | /* BlockACK bitmap */ |
673 | break; | |
674 | ||
e9348cdd CL |
675 | case 0xc5: |
676 | /* BlockACK events */ | |
acbadf01 CL |
677 | ar9170_handle_block_ack(ar, |
678 | le16_to_cpu(cmd->ba_fail_cnt.failed), | |
679 | le16_to_cpu(cmd->ba_fail_cnt.rate)); | |
680 | ar9170_tx_fake_ampdu_status(ar); | |
e9348cdd CL |
681 | break; |
682 | ||
683 | case 0xc6: | |
684 | /* Watchdog Interrupt */ | |
685 | break; | |
686 | ||
687 | case 0xc9: | |
688 | /* retransmission issue / SIFS/EIFS collision ?! */ | |
689 | break; | |
690 | ||
2543a0c4 JB |
691 | /* firmware debug */ |
692 | case 0xca: | |
693 | printk(KERN_DEBUG "ar9170 FW: %.*s\n", len - 4, (char *)buf + 4); | |
694 | break; | |
695 | case 0xcb: | |
696 | len -= 4; | |
697 | ||
698 | switch (len) { | |
699 | case 1: | |
700 | printk(KERN_DEBUG "ar9170 FW: u8: %#.2x\n", | |
701 | *((char *)buf + 4)); | |
702 | break; | |
703 | case 2: | |
704 | printk(KERN_DEBUG "ar9170 FW: u8: %#.4x\n", | |
705 | le16_to_cpup((__le16 *)((char *)buf + 4))); | |
706 | break; | |
707 | case 4: | |
708 | printk(KERN_DEBUG "ar9170 FW: u8: %#.8x\n", | |
709 | le32_to_cpup((__le32 *)((char *)buf + 4))); | |
710 | break; | |
711 | case 8: | |
712 | printk(KERN_DEBUG "ar9170 FW: u8: %#.16lx\n", | |
713 | (unsigned long)le64_to_cpup( | |
714 | (__le64 *)((char *)buf + 4))); | |
715 | break; | |
716 | } | |
717 | break; | |
718 | case 0xcc: | |
719 | print_hex_dump_bytes("ar9170 FW:", DUMP_PREFIX_NONE, | |
720 | (char *)buf + 4, len - 4); | |
721 | break; | |
722 | ||
e9348cdd CL |
723 | default: |
724 | printk(KERN_INFO "received unhandled event %x\n", cmd->type); | |
725 | print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len); | |
726 | break; | |
727 | } | |
728 | } | |
729 | ||
cca84799 | 730 | static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar) |
e9348cdd | 731 | { |
cca84799 CL |
732 | memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head)); |
733 | ar->rx_mpdu.has_plcp = false; | |
734 | } | |
e9348cdd | 735 | |
9b9c5aae | 736 | int ar9170_nag_limiter(struct ar9170 *ar) |
cca84799 CL |
737 | { |
738 | bool print_message; | |
739 | ||
740 | /* | |
741 | * we expect all sorts of errors in promiscuous mode. | |
742 | * don't bother with it, it's OK! | |
743 | */ | |
744 | if (ar->sniffer_enabled) | |
745 | return false; | |
746 | ||
747 | /* | |
748 | * only go for frequent errors! The hardware tends to | |
749 | * do some stupid thing once in a while under load, in | |
750 | * noisy environments or just for fun! | |
751 | */ | |
752 | if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit()) | |
753 | print_message = true; | |
754 | else | |
755 | print_message = false; | |
756 | ||
757 | /* reset threshold for "once in a while" */ | |
758 | ar->bad_hw_nagger = jiffies + HZ / 4; | |
759 | return print_message; | |
760 | } | |
761 | ||
762 | static int ar9170_rx_mac_status(struct ar9170 *ar, | |
763 | struct ar9170_rx_head *head, | |
764 | struct ar9170_rx_macstatus *mac, | |
765 | struct ieee80211_rx_status *status) | |
766 | { | |
767 | u8 error, decrypt; | |
e9348cdd | 768 | |
e9348cdd | 769 | BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12); |
cca84799 | 770 | BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4); |
e9348cdd | 771 | |
cca84799 CL |
772 | error = mac->error; |
773 | if (error & AR9170_RX_ERROR_MMIC) { | |
774 | status->flag |= RX_FLAG_MMIC_ERROR; | |
775 | error &= ~AR9170_RX_ERROR_MMIC; | |
776 | } | |
e9348cdd | 777 | |
cca84799 CL |
778 | if (error & AR9170_RX_ERROR_PLCP) { |
779 | status->flag |= RX_FLAG_FAILED_PLCP_CRC; | |
780 | error &= ~AR9170_RX_ERROR_PLCP; | |
e9348cdd | 781 | |
cca84799 CL |
782 | if (!(ar->filter_state & FIF_PLCPFAIL)) |
783 | return -EINVAL; | |
784 | } | |
e9348cdd | 785 | |
cca84799 CL |
786 | if (error & AR9170_RX_ERROR_FCS) { |
787 | status->flag |= RX_FLAG_FAILED_FCS_CRC; | |
788 | error &= ~AR9170_RX_ERROR_FCS; | |
e9348cdd | 789 | |
cca84799 CL |
790 | if (!(ar->filter_state & FIF_FCSFAIL)) |
791 | return -EINVAL; | |
792 | } | |
793 | ||
794 | decrypt = ar9170_get_decrypt_type(mac); | |
795 | if (!(decrypt & AR9170_RX_ENC_SOFTWARE) && | |
796 | decrypt != AR9170_ENC_ALG_NONE) | |
797 | status->flag |= RX_FLAG_DECRYPTED; | |
e9348cdd | 798 | |
cca84799 CL |
799 | /* ignore wrong RA errors */ |
800 | error &= ~AR9170_RX_ERROR_WRONG_RA; | |
e9348cdd | 801 | |
cca84799 CL |
802 | if (error & AR9170_RX_ERROR_DECRYPT) { |
803 | error &= ~AR9170_RX_ERROR_DECRYPT; | |
804 | /* | |
805 | * Rx decryption is done in place, | |
806 | * the original data is lost anyway. | |
807 | */ | |
808 | ||
809 | return -EINVAL; | |
810 | } | |
811 | ||
812 | /* drop any other error frames */ | |
813 | if (unlikely(error)) { | |
814 | /* TODO: update netdevice's RX dropped/errors statistics */ | |
815 | ||
816 | if (ar9170_nag_limiter(ar)) | |
817 | printk(KERN_DEBUG "%s: received frame with " | |
818 | "suspicious error code (%#x).\n", | |
819 | wiphy_name(ar->hw->wiphy), error); | |
820 | ||
821 | return -EINVAL; | |
822 | } | |
823 | ||
824 | status->band = ar->channel->band; | |
825 | status->freq = ar->channel->center_freq; | |
826 | ||
827 | switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) { | |
e9348cdd | 828 | case AR9170_RX_STATUS_MODULATION_CCK: |
cca84799 CL |
829 | if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE) |
830 | status->flag |= RX_FLAG_SHORTPRE; | |
e9348cdd CL |
831 | switch (head->plcp[0]) { |
832 | case 0x0a: | |
cca84799 | 833 | status->rate_idx = 0; |
e9348cdd CL |
834 | break; |
835 | case 0x14: | |
cca84799 | 836 | status->rate_idx = 1; |
e9348cdd CL |
837 | break; |
838 | case 0x37: | |
cca84799 | 839 | status->rate_idx = 2; |
e9348cdd CL |
840 | break; |
841 | case 0x6e: | |
cca84799 | 842 | status->rate_idx = 3; |
e9348cdd CL |
843 | break; |
844 | default: | |
cca84799 | 845 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
846 | printk(KERN_ERR "%s: invalid plcp cck rate " |
847 | "(%x).\n", wiphy_name(ar->hw->wiphy), | |
848 | head->plcp[0]); | |
cca84799 | 849 | return -EINVAL; |
e9348cdd CL |
850 | } |
851 | break; | |
cca84799 | 852 | |
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 | ||
e9348cdd CL |
900 | case AR9170_RX_STATUS_MODULATION_DUPOFDM: |
901 | /* XXX */ | |
cca84799 | 902 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
903 | printk(KERN_ERR "%s: invalid modulation\n", |
904 | wiphy_name(ar->hw->wiphy)); | |
cca84799 | 905 | return -EINVAL; |
e9348cdd CL |
906 | } |
907 | ||
cca84799 CL |
908 | return 0; |
909 | } | |
e9348cdd | 910 | |
cca84799 CL |
911 | static void ar9170_rx_phy_status(struct ar9170 *ar, |
912 | struct ar9170_rx_phystatus *phy, | |
913 | struct ieee80211_rx_status *status) | |
914 | { | |
915 | int i; | |
e9348cdd | 916 | |
cca84799 CL |
917 | BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20); |
918 | ||
919 | for (i = 0; i < 3; i++) | |
920 | if (phy->rssi[i] != 0x80) | |
921 | status->antenna |= BIT(i); | |
922 | ||
923 | /* post-process RSSI */ | |
924 | for (i = 0; i < 7; i++) | |
925 | if (phy->rssi[i] & 0x80) | |
926 | phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f; | |
927 | ||
928 | /* TODO: we could do something with phy_errors */ | |
929 | status->signal = ar->noise[0] + phy->rssi_combined; | |
930 | status->noise = ar->noise[0]; | |
931 | } | |
932 | ||
933 | static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len) | |
934 | { | |
935 | struct sk_buff *skb; | |
936 | int reserved = 0; | |
937 | struct ieee80211_hdr *hdr = (void *) buf; | |
938 | ||
939 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
940 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
941 | reserved += NET_IP_ALIGN; | |
942 | ||
943 | if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) | |
944 | reserved += NET_IP_ALIGN; | |
e9348cdd CL |
945 | } |
946 | ||
cca84799 CL |
947 | if (ieee80211_has_a4(hdr->frame_control)) |
948 | reserved += NET_IP_ALIGN; | |
949 | ||
950 | reserved = 32 + (reserved & NET_IP_ALIGN); | |
951 | ||
952 | skb = dev_alloc_skb(len + reserved); | |
953 | if (likely(skb)) { | |
954 | skb_reserve(skb, reserved); | |
955 | memcpy(skb_put(skb, len), buf, len); | |
e9348cdd CL |
956 | } |
957 | ||
cca84799 CL |
958 | return skb; |
959 | } | |
e9348cdd | 960 | |
cca84799 CL |
961 | /* |
962 | * If the frame alignment is right (or the kernel has | |
963 | * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there | |
964 | * is only a single MPDU in the USB frame, then we could | |
965 | * submit to mac80211 the SKB directly. However, since | |
966 | * there may be multiple packets in one SKB in stream | |
967 | * mode, and we need to observe the proper ordering, | |
968 | * this is non-trivial. | |
969 | */ | |
e9348cdd | 970 | |
cca84799 CL |
971 | static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) |
972 | { | |
973 | struct ar9170_rx_head *head; | |
974 | struct ar9170_rx_macstatus *mac; | |
975 | struct ar9170_rx_phystatus *phy = NULL; | |
976 | struct ieee80211_rx_status status; | |
977 | struct sk_buff *skb; | |
978 | int mpdu_len; | |
979 | ||
980 | if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac)))) | |
981 | return ; | |
982 | ||
983 | /* Received MPDU */ | |
984 | mpdu_len = len - sizeof(*mac); | |
985 | ||
986 | mac = (void *)(buf + mpdu_len); | |
987 | if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) { | |
988 | /* this frame is too damaged and can't be used - drop it */ | |
e9348cdd | 989 | |
e9348cdd CL |
990 | return ; |
991 | } | |
992 | ||
cca84799 CL |
993 | switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) { |
994 | case AR9170_RX_STATUS_MPDU_FIRST: | |
995 | /* first mpdu packet has the plcp header */ | |
996 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) { | |
997 | head = (void *) buf; | |
998 | memcpy(&ar->rx_mpdu.plcp, (void *) buf, | |
999 | sizeof(struct ar9170_rx_head)); | |
1000 | ||
1001 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
1002 | buf += sizeof(struct ar9170_rx_head); | |
1003 | ar->rx_mpdu.has_plcp = true; | |
1004 | } else { | |
1005 | if (ar9170_nag_limiter(ar)) | |
1006 | printk(KERN_ERR "%s: plcp info is clipped.\n", | |
1007 | wiphy_name(ar->hw->wiphy)); | |
1008 | return ; | |
1009 | } | |
1010 | break; | |
1011 | ||
1012 | case AR9170_RX_STATUS_MPDU_LAST: | |
1013 | /* last mpdu has a extra tail with phy status information */ | |
1014 | ||
1015 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) { | |
1016 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
1017 | phy = (void *)(buf + mpdu_len); | |
1018 | } else { | |
1019 | if (ar9170_nag_limiter(ar)) | |
1020 | printk(KERN_ERR "%s: frame tail is clipped.\n", | |
1021 | wiphy_name(ar->hw->wiphy)); | |
1022 | return ; | |
1023 | } | |
1024 | ||
1025 | case AR9170_RX_STATUS_MPDU_MIDDLE: | |
1026 | /* middle mpdus are just data */ | |
1027 | if (unlikely(!ar->rx_mpdu.has_plcp)) { | |
1028 | if (!ar9170_nag_limiter(ar)) | |
1029 | return ; | |
1030 | ||
1031 | printk(KERN_ERR "%s: rx stream did not start " | |
1032 | "with a first_mpdu frame tag.\n", | |
1033 | wiphy_name(ar->hw->wiphy)); | |
1034 | ||
1035 | return ; | |
1036 | } | |
1037 | ||
1038 | head = &ar->rx_mpdu.plcp; | |
1039 | break; | |
1040 | ||
1041 | case AR9170_RX_STATUS_MPDU_SINGLE: | |
1042 | /* single mpdu - has plcp (head) and phy status (tail) */ | |
1043 | head = (void *) buf; | |
1044 | ||
1045 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
1046 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
1047 | ||
1048 | buf += sizeof(struct ar9170_rx_head); | |
1049 | phy = (void *)(buf + mpdu_len); | |
1050 | break; | |
1051 | ||
1052 | default: | |
1053 | BUG_ON(1); | |
1054 | break; | |
e9348cdd CL |
1055 | } |
1056 | ||
cca84799 CL |
1057 | if (unlikely(mpdu_len < FCS_LEN)) |
1058 | return ; | |
e9348cdd | 1059 | |
cca84799 CL |
1060 | memset(&status, 0, sizeof(status)); |
1061 | if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status))) | |
1062 | return ; | |
e9348cdd | 1063 | |
cca84799 CL |
1064 | if (phy) |
1065 | ar9170_rx_phy_status(ar, phy, &status); | |
e9348cdd | 1066 | |
cca84799 | 1067 | skb = ar9170_rx_copy_data(buf, mpdu_len); |
f1d58c25 JB |
1068 | if (likely(skb)) { |
1069 | memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); | |
1070 | ieee80211_rx_irqsafe(ar->hw, skb); | |
1071 | } | |
e9348cdd CL |
1072 | } |
1073 | ||
e9348cdd CL |
1074 | void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb) |
1075 | { | |
cca84799 | 1076 | unsigned int i, tlen, resplen, wlen = 0, clen = 0; |
e9348cdd CL |
1077 | u8 *tbuf, *respbuf; |
1078 | ||
1079 | tbuf = skb->data; | |
1080 | tlen = skb->len; | |
1081 | ||
1082 | while (tlen >= 4) { | |
cca84799 CL |
1083 | clen = tbuf[1] << 8 | tbuf[0]; |
1084 | wlen = ALIGN(clen, 4); | |
e9348cdd | 1085 | |
cca84799 | 1086 | /* check if this is stream has a valid tag.*/ |
e9348cdd | 1087 | if (tbuf[2] != 0 || tbuf[3] != 0x4e) { |
cca84799 CL |
1088 | /* |
1089 | * TODO: handle the highly unlikely event that the | |
1090 | * corrupted stream has the TAG at the right position. | |
1091 | */ | |
1092 | ||
1093 | /* check if the frame can be repaired. */ | |
1094 | if (!ar->rx_failover_missing) { | |
1095 | /* this is no "short read". */ | |
1096 | if (ar9170_nag_limiter(ar)) { | |
1097 | printk(KERN_ERR "%s: missing tag!\n", | |
1098 | wiphy_name(ar->hw->wiphy)); | |
1099 | goto err_telluser; | |
1100 | } else | |
1101 | goto err_silent; | |
1102 | } | |
1103 | ||
1104 | if (ar->rx_failover_missing > tlen) { | |
1105 | if (ar9170_nag_limiter(ar)) { | |
1106 | printk(KERN_ERR "%s: possible multi " | |
1107 | "stream corruption!\n", | |
1108 | wiphy_name(ar->hw->wiphy)); | |
1109 | goto err_telluser; | |
1110 | } else | |
1111 | goto err_silent; | |
1112 | } | |
1113 | ||
1114 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
1115 | ar->rx_failover_missing -= tlen; | |
1116 | ||
1117 | if (ar->rx_failover_missing <= 0) { | |
1118 | /* | |
1119 | * nested ar9170_rx call! | |
1120 | * termination is guranteed, even when the | |
1121 | * combined frame also have a element with | |
1122 | * a bad tag. | |
1123 | */ | |
1124 | ||
1125 | ar->rx_failover_missing = 0; | |
1126 | ar9170_rx(ar, ar->rx_failover); | |
1127 | ||
1128 | skb_reset_tail_pointer(ar->rx_failover); | |
1129 | skb_trim(ar->rx_failover, 0); | |
1130 | } | |
1131 | ||
e9348cdd CL |
1132 | return ; |
1133 | } | |
cca84799 CL |
1134 | |
1135 | /* check if stream is clipped */ | |
e9348cdd | 1136 | if (wlen > tlen - 4) { |
cca84799 CL |
1137 | if (ar->rx_failover_missing) { |
1138 | /* TODO: handle double stream corruption. */ | |
1139 | if (ar9170_nag_limiter(ar)) { | |
1140 | printk(KERN_ERR "%s: double rx stream " | |
1141 | "corruption!\n", | |
1142 | wiphy_name(ar->hw->wiphy)); | |
1143 | goto err_telluser; | |
1144 | } else | |
1145 | goto err_silent; | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * save incomplete data set. | |
1150 | * the firmware will resend the missing bits when | |
1151 | * the rx - descriptor comes round again. | |
1152 | */ | |
1153 | ||
1154 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
1155 | ar->rx_failover_missing = clen - tlen; | |
e9348cdd CL |
1156 | return ; |
1157 | } | |
1158 | resplen = clen; | |
1159 | respbuf = tbuf + 4; | |
1160 | tbuf += wlen + 4; | |
1161 | tlen -= wlen + 4; | |
1162 | ||
1163 | i = 0; | |
1164 | ||
1165 | /* weird thing, but this is the same in the original driver */ | |
1166 | while (resplen > 2 && i < 12 && | |
1167 | respbuf[0] == 0xff && respbuf[1] == 0xff) { | |
1168 | i += 2; | |
1169 | resplen -= 2; | |
1170 | respbuf += 2; | |
1171 | } | |
1172 | ||
1173 | if (resplen < 4) | |
1174 | continue; | |
1175 | ||
1176 | /* found the 6 * 0xffff marker? */ | |
1177 | if (i == 12) | |
1178 | ar9170_handle_command_response(ar, respbuf, resplen); | |
1179 | else | |
cca84799 | 1180 | ar9170_handle_mpdu(ar, respbuf, clen); |
e9348cdd CL |
1181 | } |
1182 | ||
cca84799 CL |
1183 | if (tlen) { |
1184 | if (net_ratelimit()) | |
1185 | printk(KERN_ERR "%s: %d bytes of unprocessed " | |
1186 | "data left in rx stream!\n", | |
1187 | wiphy_name(ar->hw->wiphy), tlen); | |
1188 | ||
1189 | goto err_telluser; | |
1190 | } | |
1191 | ||
1192 | return ; | |
1193 | ||
1194 | err_telluser: | |
1195 | printk(KERN_ERR "%s: damaged RX stream data [want:%d, " | |
1196 | "data:%d, rx:%d, pending:%d ]\n", | |
1197 | wiphy_name(ar->hw->wiphy), clen, wlen, tlen, | |
1198 | ar->rx_failover_missing); | |
1199 | ||
1200 | if (ar->rx_failover_missing) | |
1201 | print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET, | |
1202 | ar->rx_failover->data, | |
1203 | ar->rx_failover->len); | |
1204 | ||
1205 | print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET, | |
1206 | skb->data, skb->len); | |
1207 | ||
1208 | printk(KERN_ERR "%s: please check your hardware and cables, if " | |
1209 | "you see this message frequently.\n", | |
1210 | wiphy_name(ar->hw->wiphy)); | |
1211 | ||
1212 | err_silent: | |
1213 | if (ar->rx_failover_missing) { | |
1214 | skb_reset_tail_pointer(ar->rx_failover); | |
1215 | skb_trim(ar->rx_failover, 0); | |
1216 | ar->rx_failover_missing = 0; | |
1217 | } | |
e9348cdd | 1218 | } |
e9348cdd CL |
1219 | |
1220 | #define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \ | |
1221 | do { \ | |
1222 | queue.aifs = ai_fs; \ | |
1223 | queue.cw_min = cwmin; \ | |
1224 | queue.cw_max = cwmax; \ | |
1225 | queue.txop = _txop; \ | |
1226 | } while (0) | |
1227 | ||
1228 | static int ar9170_op_start(struct ieee80211_hw *hw) | |
1229 | { | |
1230 | struct ar9170 *ar = hw->priv; | |
1231 | int err, i; | |
1232 | ||
1233 | mutex_lock(&ar->mutex); | |
1234 | ||
864cc02e CL |
1235 | ar->filter_changed = 0; |
1236 | ||
e9348cdd CL |
1237 | /* reinitialize queues statistics */ |
1238 | memset(&ar->tx_stats, 0, sizeof(ar->tx_stats)); | |
9b9c5aae CL |
1239 | for (i = 0; i < __AR9170_NUM_TXQ; i++) |
1240 | ar->tx_stats[i].limit = AR9170_TXQ_DEPTH; | |
e9348cdd CL |
1241 | |
1242 | /* reset QoS defaults */ | |
1243 | AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/ | |
1244 | AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */ | |
1245 | AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */ | |
1246 | AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */ | |
1247 | AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */ | |
1248 | ||
acbadf01 CL |
1249 | /* set sane AMPDU defaults */ |
1250 | ar->global_ampdu_density = 6; | |
1251 | ar->global_ampdu_factor = 3; | |
1252 | ||
cca84799 CL |
1253 | ar->bad_hw_nagger = jiffies; |
1254 | ||
e9348cdd CL |
1255 | err = ar->open(ar); |
1256 | if (err) | |
1257 | goto out; | |
1258 | ||
1259 | err = ar9170_init_mac(ar); | |
1260 | if (err) | |
1261 | goto out; | |
1262 | ||
1263 | err = ar9170_set_qos(ar); | |
1264 | if (err) | |
1265 | goto out; | |
1266 | ||
1267 | err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ); | |
1268 | if (err) | |
1269 | goto out; | |
1270 | ||
1271 | err = ar9170_init_rf(ar); | |
1272 | if (err) | |
1273 | goto out; | |
1274 | ||
1275 | /* start DMA */ | |
1276 | err = ar9170_write_reg(ar, 0x1c3d30, 0x100); | |
1277 | if (err) | |
1278 | goto out; | |
1279 | ||
1280 | ar->state = AR9170_STARTED; | |
1281 | ||
1282 | out: | |
1283 | mutex_unlock(&ar->mutex); | |
1284 | return err; | |
1285 | } | |
1286 | ||
1287 | static void ar9170_op_stop(struct ieee80211_hw *hw) | |
1288 | { | |
1289 | struct ar9170 *ar = hw->priv; | |
9b9c5aae | 1290 | unsigned int i; |
e9348cdd CL |
1291 | |
1292 | if (IS_STARTED(ar)) | |
1293 | ar->state = AR9170_IDLE; | |
1294 | ||
9b9c5aae | 1295 | cancel_delayed_work_sync(&ar->tx_janitor); |
ff8365ca | 1296 | #ifdef CONFIG_AR9170_LEDS |
acbadf01 | 1297 | cancel_delayed_work_sync(&ar->led_work); |
ff8365ca | 1298 | #endif |
e9348cdd CL |
1299 | cancel_work_sync(&ar->filter_config_work); |
1300 | cancel_work_sync(&ar->beacon_work); | |
e351cfbf | 1301 | |
b55d6bcf | 1302 | mutex_lock(&ar->mutex); |
e9348cdd CL |
1303 | |
1304 | if (IS_ACCEPTING_CMD(ar)) { | |
1305 | ar9170_set_leds_state(ar, 0); | |
1306 | ||
1307 | /* stop DMA */ | |
1308 | ar9170_write_reg(ar, 0x1c3d30, 0); | |
1309 | ar->stop(ar); | |
1310 | } | |
1311 | ||
9b9c5aae CL |
1312 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { |
1313 | skb_queue_purge(&ar->tx_pending[i]); | |
1314 | skb_queue_purge(&ar->tx_status[i]); | |
1315 | } | |
acbadf01 CL |
1316 | skb_queue_purge(&ar->tx_status_ampdu); |
1317 | ||
e9348cdd CL |
1318 | mutex_unlock(&ar->mutex); |
1319 | } | |
1320 | ||
acbadf01 CL |
1321 | static void ar9170_tx_indicate_immba(struct ar9170 *ar, struct sk_buff *skb) |
1322 | { | |
1323 | struct ar9170_tx_control *txc = (void *) skb->data; | |
1324 | ||
1325 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_IMM_AMPDU); | |
1326 | } | |
1327 | ||
1328 | static void ar9170_tx_copy_phy(struct ar9170 *ar, struct sk_buff *dst, | |
1329 | struct sk_buff *src) | |
1330 | { | |
1331 | struct ar9170_tx_control *dst_txc, *src_txc; | |
1332 | struct ieee80211_tx_info *dst_info, *src_info; | |
1333 | struct ar9170_tx_info *dst_arinfo, *src_arinfo; | |
1334 | ||
1335 | src_txc = (void *) src->data; | |
1336 | src_info = IEEE80211_SKB_CB(src); | |
1337 | src_arinfo = (void *) src_info->rate_driver_data; | |
1338 | ||
1339 | dst_txc = (void *) dst->data; | |
1340 | dst_info = IEEE80211_SKB_CB(dst); | |
1341 | dst_arinfo = (void *) dst_info->rate_driver_data; | |
1342 | ||
1343 | dst_txc->phy_control = src_txc->phy_control; | |
1344 | ||
1345 | /* same MCS for the whole aggregate */ | |
1346 | memcpy(dst_info->driver_rates, src_info->driver_rates, | |
1347 | sizeof(dst_info->driver_rates)); | |
1348 | } | |
1349 | ||
9b9c5aae | 1350 | static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb) |
e9348cdd | 1351 | { |
e9348cdd CL |
1352 | struct ieee80211_hdr *hdr; |
1353 | struct ar9170_tx_control *txc; | |
1354 | struct ieee80211_tx_info *info; | |
e9348cdd | 1355 | struct ieee80211_tx_rate *txrate; |
9b9c5aae | 1356 | struct ar9170_tx_info *arinfo; |
e9348cdd | 1357 | unsigned int queue = skb_get_queue_mapping(skb); |
e9348cdd CL |
1358 | u16 keytype = 0; |
1359 | u16 len, icv = 0; | |
e9348cdd | 1360 | |
9b9c5aae | 1361 | BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data)); |
e9348cdd CL |
1362 | |
1363 | hdr = (void *)skb->data; | |
1364 | info = IEEE80211_SKB_CB(skb); | |
1365 | len = skb->len; | |
1366 | ||
e9348cdd CL |
1367 | txc = (void *)skb_push(skb, sizeof(*txc)); |
1368 | ||
e9348cdd CL |
1369 | if (info->control.hw_key) { |
1370 | icv = info->control.hw_key->icv_len; | |
1371 | ||
1372 | switch (info->control.hw_key->alg) { | |
1373 | case ALG_WEP: | |
1374 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1375 | break; | |
1376 | case ALG_TKIP: | |
1377 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1378 | break; | |
1379 | case ALG_CCMP: | |
1380 | keytype = AR9170_TX_MAC_ENCR_AES; | |
1381 | break; | |
1382 | default: | |
1383 | WARN_ON(1); | |
9b9c5aae | 1384 | goto err_out; |
e9348cdd CL |
1385 | } |
1386 | } | |
1387 | ||
1388 | /* Length */ | |
1389 | txc->length = cpu_to_le16(len + icv + 4); | |
1390 | ||
1391 | txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION | | |
1392 | AR9170_TX_MAC_BACKOFF); | |
1393 | txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] << | |
1394 | AR9170_TX_MAC_QOS_SHIFT); | |
1395 | txc->mac_control |= cpu_to_le16(keytype); | |
1396 | txc->phy_control = cpu_to_le32(0); | |
1397 | ||
1398 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1399 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK); | |
1400 | ||
e9348cdd | 1401 | txrate = &info->control.rates[0]; |
e9348cdd CL |
1402 | if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
1403 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS); | |
1404 | else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS) | |
1405 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS); | |
1406 | ||
9b9c5aae CL |
1407 | arinfo = (void *)info->rate_driver_data; |
1408 | arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT); | |
1409 | ||
1410 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && | |
1411 | (is_valid_ether_addr(ieee80211_get_DA(hdr)))) { | |
1412 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { | |
1413 | if (unlikely(!info->control.sta)) | |
1414 | goto err_out; | |
1415 | ||
1416 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR); | |
1417 | arinfo->flags = AR9170_TX_FLAG_BLOCK_ACK; | |
acbadf01 | 1418 | |
9b9c5aae CL |
1419 | goto out; |
1420 | } | |
1421 | ||
1422 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE); | |
1423 | /* | |
1424 | * WARNING: | |
1425 | * Putting the QoS queue bits into an unexplored territory is | |
1426 | * certainly not elegant. | |
1427 | * | |
1428 | * In my defense: This idea provides a reasonable way to | |
1429 | * smuggle valuable information to the tx_status callback. | |
1430 | * Also, the idea behind this bit-abuse came straight from | |
1431 | * the original driver code. | |
1432 | */ | |
1433 | ||
1434 | txc->phy_control |= | |
1435 | cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT); | |
1436 | arinfo->flags = AR9170_TX_FLAG_WAIT_FOR_ACK; | |
1437 | } else { | |
1438 | arinfo->flags = AR9170_TX_FLAG_NO_ACK; | |
1439 | } | |
1440 | ||
1441 | out: | |
1442 | return 0; | |
1443 | ||
1444 | err_out: | |
1445 | skb_pull(skb, sizeof(*txc)); | |
1446 | return -EINVAL; | |
1447 | } | |
1448 | ||
1449 | static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb) | |
1450 | { | |
1451 | struct ar9170_tx_control *txc; | |
1452 | struct ieee80211_tx_info *info; | |
1453 | struct ieee80211_rate *rate = NULL; | |
1454 | struct ieee80211_tx_rate *txrate; | |
1455 | u32 power, chains; | |
1456 | ||
1457 | txc = (void *) skb->data; | |
1458 | info = IEEE80211_SKB_CB(skb); | |
1459 | txrate = &info->control.rates[0]; | |
1460 | ||
e9348cdd CL |
1461 | if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD) |
1462 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD); | |
1463 | ||
1464 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) | |
1465 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE); | |
1466 | ||
1467 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
1468 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ); | |
1469 | /* this works because 40 MHz is 2 and dup is 3 */ | |
1470 | if (txrate->flags & IEEE80211_TX_RC_DUP_DATA) | |
1471 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP); | |
1472 | ||
1473 | if (txrate->flags & IEEE80211_TX_RC_SHORT_GI) | |
1474 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI); | |
1475 | ||
1476 | if (txrate->flags & IEEE80211_TX_RC_MCS) { | |
1477 | u32 r = txrate->idx; | |
1478 | u8 *txpower; | |
1479 | ||
9b9c5aae CL |
1480 | /* heavy clip control */ |
1481 | txc->phy_control |= cpu_to_le32((r & 0x7) << 7); | |
1482 | ||
e9348cdd | 1483 | r <<= AR9170_TX_PHY_MCS_SHIFT; |
9b9c5aae CL |
1484 | BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK); |
1485 | ||
e9348cdd CL |
1486 | txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK); |
1487 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT); | |
1488 | ||
1489 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) { | |
1490 | if (info->band == IEEE80211_BAND_5GHZ) | |
1491 | txpower = ar->power_5G_ht40; | |
1492 | else | |
1493 | txpower = ar->power_2G_ht40; | |
1494 | } else { | |
1495 | if (info->band == IEEE80211_BAND_5GHZ) | |
1496 | txpower = ar->power_5G_ht20; | |
1497 | else | |
1498 | txpower = ar->power_2G_ht20; | |
1499 | } | |
1500 | ||
1501 | power = txpower[(txrate->idx) & 7]; | |
1502 | } else { | |
1503 | u8 *txpower; | |
1504 | u32 mod; | |
1505 | u32 phyrate; | |
1506 | u8 idx = txrate->idx; | |
1507 | ||
1508 | if (info->band != IEEE80211_BAND_2GHZ) { | |
1509 | idx += 4; | |
1510 | txpower = ar->power_5G_leg; | |
1511 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1512 | } else { | |
1513 | if (idx < 4) { | |
1514 | txpower = ar->power_2G_cck; | |
1515 | mod = AR9170_TX_PHY_MOD_CCK; | |
1516 | } else { | |
1517 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1518 | txpower = ar->power_2G_ofdm; | |
1519 | } | |
1520 | } | |
1521 | ||
1522 | rate = &__ar9170_ratetable[idx]; | |
1523 | ||
1524 | phyrate = rate->hw_value & 0xF; | |
1525 | power = txpower[(rate->hw_value & 0x30) >> 4]; | |
1526 | phyrate <<= AR9170_TX_PHY_MCS_SHIFT; | |
1527 | ||
1528 | txc->phy_control |= cpu_to_le32(mod); | |
1529 | txc->phy_control |= cpu_to_le32(phyrate); | |
1530 | } | |
1531 | ||
1532 | power <<= AR9170_TX_PHY_TX_PWR_SHIFT; | |
1533 | power &= AR9170_TX_PHY_TX_PWR_MASK; | |
1534 | txc->phy_control |= cpu_to_le32(power); | |
1535 | ||
1536 | /* set TX chains */ | |
1537 | if (ar->eeprom.tx_mask == 1) { | |
1538 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1539 | } else { | |
1540 | chains = AR9170_TX_PHY_TXCHAIN_2; | |
1541 | ||
1542 | /* >= 36M legacy OFDM - use only one chain */ | |
1543 | if (rate && rate->bitrate >= 360) | |
1544 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1545 | } | |
1546 | txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT); | |
9b9c5aae | 1547 | } |
e9348cdd | 1548 | |
acbadf01 CL |
1549 | static bool ar9170_tx_ampdu(struct ar9170 *ar) |
1550 | { | |
1551 | struct sk_buff_head agg; | |
1552 | struct ar9170_sta_tid *tid_info = NULL, *tmp; | |
1553 | struct sk_buff *skb, *first = NULL; | |
1554 | unsigned long flags, f2; | |
1555 | unsigned int i = 0; | |
1556 | u16 seq, queue, tmpssn; | |
1557 | bool run = false; | |
1558 | ||
1559 | skb_queue_head_init(&agg); | |
1560 | ||
1561 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
1562 | if (list_empty(&ar->tx_ampdu_list)) { | |
1563 | #ifdef AR9170_TXAGG_DEBUG | |
1564 | printk(KERN_DEBUG "%s: aggregation list is empty.\n", | |
1565 | wiphy_name(ar->hw->wiphy)); | |
1566 | #endif /* AR9170_TXAGG_DEBUG */ | |
1567 | goto out_unlock; | |
1568 | } | |
1569 | ||
1570 | list_for_each_entry_safe(tid_info, tmp, &ar->tx_ampdu_list, list) { | |
1571 | if (tid_info->state != AR9170_TID_STATE_COMPLETE) { | |
1572 | #ifdef AR9170_TXAGG_DEBUG | |
1573 | printk(KERN_DEBUG "%s: dangling aggregation entry!\n", | |
1574 | wiphy_name(ar->hw->wiphy)); | |
1575 | #endif /* AR9170_TXAGG_DEBUG */ | |
1576 | continue; | |
1577 | } | |
1578 | ||
1579 | if (++i > 64) { | |
1580 | #ifdef AR9170_TXAGG_DEBUG | |
1581 | printk(KERN_DEBUG "%s: enough frames aggregated.\n", | |
1582 | wiphy_name(ar->hw->wiphy)); | |
1583 | #endif /* AR9170_TXAGG_DEBUG */ | |
1584 | break; | |
1585 | } | |
1586 | ||
1587 | queue = TID_TO_WME_AC(tid_info->tid); | |
1588 | ||
1589 | if (skb_queue_len(&ar->tx_pending[queue]) >= | |
1590 | AR9170_NUM_TX_AGG_MAX) { | |
1591 | #ifdef AR9170_TXAGG_DEBUG | |
1592 | printk(KERN_DEBUG "%s: queue %d full.\n", | |
1593 | wiphy_name(ar->hw->wiphy), queue); | |
1594 | #endif /* AR9170_TXAGG_DEBUG */ | |
1595 | continue; | |
1596 | } | |
1597 | ||
1598 | list_del_init(&tid_info->list); | |
1599 | ||
1600 | spin_lock_irqsave(&tid_info->queue.lock, f2); | |
1601 | tmpssn = seq = tid_info->ssn; | |
1602 | first = skb_peek(&tid_info->queue); | |
1603 | ||
1604 | if (likely(first)) | |
1605 | tmpssn = ar9170_get_seq(first); | |
1606 | ||
1607 | if (unlikely(tmpssn != seq)) { | |
1608 | #ifdef AR9170_TXAGG_DEBUG | |
1609 | printk(KERN_DEBUG "%s: ssn mismatch [%d != %d]\n.", | |
1610 | wiphy_name(ar->hw->wiphy), seq, tmpssn); | |
1611 | #endif /* AR9170_TXAGG_DEBUG */ | |
1612 | tid_info->ssn = tmpssn; | |
1613 | } | |
1614 | ||
1615 | #ifdef AR9170_TXAGG_DEBUG | |
1616 | printk(KERN_DEBUG "%s: generate A-MPDU for tid:%d ssn:%d with " | |
1617 | "%d queued frames.\n", wiphy_name(ar->hw->wiphy), | |
1618 | tid_info->tid, tid_info->ssn, | |
1619 | skb_queue_len(&tid_info->queue)); | |
1620 | __ar9170_dump_txqueue(ar, &tid_info->queue); | |
1621 | #endif /* AR9170_TXAGG_DEBUG */ | |
1622 | ||
1623 | while ((skb = skb_peek(&tid_info->queue))) { | |
1624 | if (unlikely(ar9170_get_seq(skb) != seq)) | |
1625 | break; | |
1626 | ||
1627 | __skb_unlink(skb, &tid_info->queue); | |
1628 | tid_info->ssn = seq = GET_NEXT_SEQ(seq); | |
1629 | ||
1630 | if (unlikely(skb_get_queue_mapping(skb) != queue)) { | |
1631 | #ifdef AR9170_TXAGG_DEBUG | |
1632 | printk(KERN_DEBUG "%s: tid:%d(q:%d) queue:%d " | |
1633 | "!match.\n", wiphy_name(ar->hw->wiphy), | |
1634 | tid_info->tid, | |
1635 | TID_TO_WME_AC(tid_info->tid), | |
1636 | skb_get_queue_mapping(skb)); | |
1637 | #endif /* AR9170_TXAGG_DEBUG */ | |
1638 | dev_kfree_skb_any(skb); | |
1639 | continue; | |
1640 | } | |
1641 | ||
1642 | if (unlikely(first == skb)) { | |
1643 | ar9170_tx_prepare_phy(ar, skb); | |
1644 | __skb_queue_tail(&agg, skb); | |
1645 | first = skb; | |
1646 | } else { | |
1647 | ar9170_tx_copy_phy(ar, skb, first); | |
1648 | __skb_queue_tail(&agg, skb); | |
1649 | } | |
1650 | ||
1651 | if (unlikely(skb_queue_len(&agg) == | |
1652 | AR9170_NUM_TX_AGG_MAX)) | |
1653 | break; | |
1654 | } | |
1655 | ||
1656 | if (skb_queue_empty(&tid_info->queue)) | |
1657 | tid_info->active = false; | |
1658 | else | |
1659 | list_add_tail(&tid_info->list, | |
1660 | &ar->tx_ampdu_list); | |
1661 | ||
1662 | spin_unlock_irqrestore(&tid_info->queue.lock, f2); | |
1663 | ||
1664 | if (unlikely(skb_queue_empty(&agg))) { | |
1665 | #ifdef AR9170_TXAGG_DEBUG | |
1666 | printk(KERN_DEBUG "%s: queued empty list!\n", | |
1667 | wiphy_name(ar->hw->wiphy)); | |
1668 | #endif /* AR9170_TXAGG_DEBUG */ | |
1669 | continue; | |
1670 | } | |
1671 | ||
1672 | /* | |
1673 | * tell the FW/HW that this is the last frame, | |
1674 | * that way it will wait for the immediate block ack. | |
1675 | */ | |
1676 | if (likely(skb_peek_tail(&agg))) | |
1677 | ar9170_tx_indicate_immba(ar, skb_peek_tail(&agg)); | |
1678 | ||
1679 | #ifdef AR9170_TXAGG_DEBUG | |
1680 | printk(KERN_DEBUG "%s: generated A-MPDU looks like this:\n", | |
1681 | wiphy_name(ar->hw->wiphy)); | |
1682 | __ar9170_dump_txqueue(ar, &agg); | |
1683 | #endif /* AR9170_TXAGG_DEBUG */ | |
1684 | ||
1685 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
1686 | ||
1687 | spin_lock_irqsave(&ar->tx_pending[queue].lock, flags); | |
1688 | skb_queue_splice_tail_init(&agg, &ar->tx_pending[queue]); | |
1689 | spin_unlock_irqrestore(&ar->tx_pending[queue].lock, flags); | |
1690 | run = true; | |
1691 | ||
1692 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
1693 | } | |
1694 | ||
1695 | out_unlock: | |
1696 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
1697 | __skb_queue_purge(&agg); | |
1698 | ||
1699 | return run; | |
1700 | } | |
1701 | ||
9b9c5aae CL |
1702 | static void ar9170_tx(struct ar9170 *ar) |
1703 | { | |
1704 | struct sk_buff *skb; | |
1705 | unsigned long flags; | |
1706 | struct ieee80211_tx_info *info; | |
1707 | struct ar9170_tx_info *arinfo; | |
1708 | unsigned int i, frames, frames_failed, remaining_space; | |
1709 | int err; | |
1710 | bool schedule_garbagecollector = false; | |
e9348cdd | 1711 | |
9b9c5aae | 1712 | BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data)); |
e9348cdd | 1713 | |
9b9c5aae CL |
1714 | if (unlikely(!IS_STARTED(ar))) |
1715 | return ; | |
1716 | ||
1717 | remaining_space = AR9170_TX_MAX_PENDING; | |
1718 | ||
1719 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { | |
1720 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1721 | if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) { | |
1722 | #ifdef AR9170_QUEUE_DEBUG | |
1723 | printk(KERN_DEBUG "%s: queue %d full\n", | |
1724 | wiphy_name(ar->hw->wiphy), i); | |
1725 | ||
acbadf01 CL |
1726 | printk(KERN_DEBUG "%s: stuck frames: ===> \n", |
1727 | wiphy_name(ar->hw->wiphy)); | |
9b9c5aae CL |
1728 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); |
1729 | ar9170_dump_txqueue(ar, &ar->tx_status[i]); | |
1730 | #endif /* AR9170_QUEUE_DEBUG */ | |
acbadf01 CL |
1731 | |
1732 | #ifdef AR9170_QUEUE_STOP_DEBUG | |
1733 | printk(KERN_DEBUG "%s: stop queue %d\n", | |
1734 | wiphy_name(ar->hw->wiphy), i); | |
1735 | __ar9170_dump_txstats(ar); | |
1736 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
9b9c5aae CL |
1737 | ieee80211_stop_queue(ar->hw, i); |
1738 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1739 | continue; | |
1740 | } | |
e9348cdd | 1741 | |
9b9c5aae CL |
1742 | frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len, |
1743 | skb_queue_len(&ar->tx_pending[i])); | |
1744 | ||
1745 | if (remaining_space < frames) { | |
1746 | #ifdef AR9170_QUEUE_DEBUG | |
1747 | printk(KERN_DEBUG "%s: tx quota reached queue:%d, " | |
1748 | "remaining slots:%d, needed:%d\n", | |
1749 | wiphy_name(ar->hw->wiphy), i, remaining_space, | |
1750 | frames); | |
9b9c5aae CL |
1751 | #endif /* AR9170_QUEUE_DEBUG */ |
1752 | frames = remaining_space; | |
1753 | } | |
1754 | ||
1755 | ar->tx_stats[i].len += frames; | |
1756 | ar->tx_stats[i].count += frames; | |
1757 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1758 | ||
1759 | if (!frames) | |
1760 | continue; | |
1761 | ||
1762 | frames_failed = 0; | |
1763 | while (frames) { | |
1764 | skb = skb_dequeue(&ar->tx_pending[i]); | |
1765 | if (unlikely(!skb)) { | |
1766 | frames_failed += frames; | |
1767 | frames = 0; | |
1768 | break; | |
1769 | } | |
1770 | ||
1771 | info = IEEE80211_SKB_CB(skb); | |
1772 | arinfo = (void *) info->rate_driver_data; | |
1773 | ||
1774 | /* TODO: cancel stuck frames */ | |
1775 | arinfo->timeout = jiffies + | |
1776 | msecs_to_jiffies(AR9170_TX_TIMEOUT); | |
1777 | ||
acbadf01 CL |
1778 | if (arinfo->flags == AR9170_TX_FLAG_BLOCK_ACK) |
1779 | ar->tx_ampdu_pending++; | |
1780 | ||
9b9c5aae CL |
1781 | #ifdef AR9170_QUEUE_DEBUG |
1782 | printk(KERN_DEBUG "%s: send frame q:%d =>\n", | |
1783 | wiphy_name(ar->hw->wiphy), i); | |
1784 | ar9170_print_txheader(ar, skb); | |
1785 | #endif /* AR9170_QUEUE_DEBUG */ | |
1786 | ||
1787 | err = ar->tx(ar, skb); | |
1788 | if (unlikely(err)) { | |
acbadf01 CL |
1789 | if (arinfo->flags == AR9170_TX_FLAG_BLOCK_ACK) |
1790 | ar->tx_ampdu_pending--; | |
1791 | ||
9b9c5aae CL |
1792 | frames_failed++; |
1793 | dev_kfree_skb_any(skb); | |
1794 | } else { | |
1795 | remaining_space--; | |
1796 | schedule_garbagecollector = true; | |
1797 | } | |
1798 | ||
1799 | frames--; | |
1800 | } | |
1801 | ||
1802 | #ifdef AR9170_QUEUE_DEBUG | |
1803 | printk(KERN_DEBUG "%s: ar9170_tx report for queue %d\n", | |
1804 | wiphy_name(ar->hw->wiphy), i); | |
1805 | ||
1806 | printk(KERN_DEBUG "%s: unprocessed pending frames left:\n", | |
1807 | wiphy_name(ar->hw->wiphy)); | |
1808 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); | |
1809 | #endif /* AR9170_QUEUE_DEBUG */ | |
1810 | ||
1811 | if (unlikely(frames_failed)) { | |
1812 | #ifdef AR9170_QUEUE_DEBUG | |
acbadf01 | 1813 | printk(KERN_DEBUG "%s: frames failed %d =>\n", |
9b9c5aae CL |
1814 | wiphy_name(ar->hw->wiphy), frames_failed); |
1815 | #endif /* AR9170_QUEUE_DEBUG */ | |
1816 | ||
1817 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1818 | ar->tx_stats[i].len -= frames_failed; | |
1819 | ar->tx_stats[i].count -= frames_failed; | |
acbadf01 CL |
1820 | #ifdef AR9170_QUEUE_STOP_DEBUG |
1821 | printk(KERN_DEBUG "%s: wake queue %d\n", | |
1822 | wiphy_name(ar->hw->wiphy), i); | |
1823 | __ar9170_dump_txstats(ar); | |
1824 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
9b9c5aae CL |
1825 | ieee80211_wake_queue(ar->hw, i); |
1826 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
e9348cdd CL |
1827 | } |
1828 | } | |
1829 | ||
42935eca LR |
1830 | if (!schedule_garbagecollector) |
1831 | return; | |
1832 | ||
1833 | ieee80211_queue_delayed_work(ar->hw, | |
1834 | &ar->tx_janitor, | |
1835 | msecs_to_jiffies(AR9170_JANITOR_DELAY)); | |
9b9c5aae CL |
1836 | } |
1837 | ||
acbadf01 CL |
1838 | static bool ar9170_tx_ampdu_queue(struct ar9170 *ar, struct sk_buff *skb) |
1839 | { | |
1840 | struct ieee80211_tx_info *txinfo; | |
1841 | struct ar9170_sta_info *sta_info; | |
1842 | struct ar9170_sta_tid *agg; | |
1843 | struct sk_buff *iter; | |
1844 | unsigned long flags, f2; | |
1845 | unsigned int max; | |
1846 | u16 tid, seq, qseq; | |
1847 | bool run = false, queue = false; | |
1848 | ||
1849 | tid = ar9170_get_tid(skb); | |
1850 | seq = ar9170_get_seq(skb); | |
1851 | txinfo = IEEE80211_SKB_CB(skb); | |
1852 | sta_info = (void *) txinfo->control.sta->drv_priv; | |
1853 | agg = &sta_info->agg[tid]; | |
1854 | max = sta_info->ampdu_max_len; | |
1855 | ||
1856 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
1857 | ||
1858 | if (unlikely(agg->state != AR9170_TID_STATE_COMPLETE)) { | |
1859 | #ifdef AR9170_TXAGG_DEBUG | |
1860 | printk(KERN_DEBUG "%s: BlockACK session not fully initialized " | |
1861 | "for ESS:%pM tid:%d state:%d.\n", | |
1862 | wiphy_name(ar->hw->wiphy), agg->addr, agg->tid, | |
1863 | agg->state); | |
1864 | #endif /* AR9170_TXAGG_DEBUG */ | |
1865 | goto err_unlock; | |
1866 | } | |
1867 | ||
1868 | if (!agg->active) { | |
1869 | agg->active = true; | |
1870 | agg->ssn = seq; | |
1871 | queue = true; | |
1872 | } | |
1873 | ||
1874 | /* check if seq is within the BA window */ | |
1875 | if (unlikely(!BAW_WITHIN(agg->ssn, max, seq))) { | |
1876 | #ifdef AR9170_TXAGG_DEBUG | |
1877 | printk(KERN_DEBUG "%s: frame with tid:%d seq:%d does not " | |
1878 | "fit into BA window (%d - %d)\n", | |
1879 | wiphy_name(ar->hw->wiphy), tid, seq, agg->ssn, | |
1880 | (agg->ssn + max) & 0xfff); | |
1881 | #endif /* AR9170_TXAGG_DEBUG */ | |
1882 | goto err_unlock; | |
1883 | } | |
1884 | ||
1885 | spin_lock_irqsave(&agg->queue.lock, f2); | |
1886 | ||
1887 | skb_queue_reverse_walk(&agg->queue, iter) { | |
1888 | qseq = ar9170_get_seq(iter); | |
1889 | ||
1890 | if (GET_NEXT_SEQ(qseq) == seq) { | |
1891 | __skb_queue_after(&agg->queue, iter, skb); | |
1892 | goto queued; | |
1893 | } | |
1894 | } | |
1895 | ||
1896 | __skb_queue_head(&agg->queue, skb); | |
1897 | ||
1898 | queued: | |
1899 | spin_unlock_irqrestore(&agg->queue.lock, f2); | |
1900 | ||
1901 | #ifdef AR9170_TXAGG_DEBUG | |
1902 | printk(KERN_DEBUG "%s: new aggregate %p queued.\n", | |
1903 | wiphy_name(ar->hw->wiphy), skb); | |
1904 | __ar9170_dump_txqueue(ar, &agg->queue); | |
1905 | #endif /* AR9170_TXAGG_DEBUG */ | |
1906 | ||
1907 | if (skb_queue_len(&agg->queue) >= AR9170_NUM_TX_AGG_MAX) | |
1908 | run = true; | |
1909 | ||
1910 | if (queue) | |
1911 | list_add_tail(&agg->list, &ar->tx_ampdu_list); | |
1912 | ||
1913 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
1914 | return run; | |
1915 | ||
1916 | err_unlock: | |
1917 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
1918 | dev_kfree_skb_irq(skb); | |
1919 | return false; | |
1920 | } | |
1921 | ||
9b9c5aae CL |
1922 | int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) |
1923 | { | |
1924 | struct ar9170 *ar = hw->priv; | |
1925 | struct ieee80211_tx_info *info; | |
1926 | ||
1927 | if (unlikely(!IS_STARTED(ar))) | |
1928 | goto err_free; | |
1929 | ||
1930 | if (unlikely(ar9170_tx_prepare(ar, skb))) | |
1931 | goto err_free; | |
1932 | ||
1933 | info = IEEE80211_SKB_CB(skb); | |
1934 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { | |
acbadf01 CL |
1935 | bool run = ar9170_tx_ampdu_queue(ar, skb); |
1936 | ||
1937 | if (run || !ar->tx_ampdu_pending) | |
1938 | ar9170_tx_ampdu(ar); | |
9b9c5aae CL |
1939 | } else { |
1940 | unsigned int queue = skb_get_queue_mapping(skb); | |
1941 | ||
1942 | ar9170_tx_prepare_phy(ar, skb); | |
1943 | skb_queue_tail(&ar->tx_pending[queue], skb); | |
e9348cdd CL |
1944 | } |
1945 | ||
9b9c5aae | 1946 | ar9170_tx(ar); |
e9348cdd CL |
1947 | return NETDEV_TX_OK; |
1948 | ||
e9348cdd | 1949 | err_free: |
9b9c5aae | 1950 | dev_kfree_skb_any(skb); |
e9348cdd CL |
1951 | return NETDEV_TX_OK; |
1952 | } | |
1953 | ||
1954 | static int ar9170_op_add_interface(struct ieee80211_hw *hw, | |
1955 | struct ieee80211_if_init_conf *conf) | |
1956 | { | |
1957 | struct ar9170 *ar = hw->priv; | |
1958 | int err = 0; | |
1959 | ||
1960 | mutex_lock(&ar->mutex); | |
1961 | ||
1962 | if (ar->vif) { | |
1963 | err = -EBUSY; | |
1964 | goto unlock; | |
1965 | } | |
1966 | ||
1967 | ar->vif = conf->vif; | |
1968 | memcpy(ar->mac_addr, conf->mac_addr, ETH_ALEN); | |
1969 | ||
1970 | if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) { | |
1971 | ar->rx_software_decryption = true; | |
1972 | ar->disable_offload = true; | |
1973 | } | |
1974 | ||
1975 | ar->cur_filter = 0; | |
1976 | ar->want_filter = AR9170_MAC_REG_FTF_DEFAULTS; | |
1977 | err = ar9170_update_frame_filter(ar); | |
1978 | if (err) | |
1979 | goto unlock; | |
1980 | ||
1981 | err = ar9170_set_operating_mode(ar); | |
1982 | ||
1983 | unlock: | |
1984 | mutex_unlock(&ar->mutex); | |
1985 | return err; | |
1986 | } | |
1987 | ||
1988 | static void ar9170_op_remove_interface(struct ieee80211_hw *hw, | |
1989 | struct ieee80211_if_init_conf *conf) | |
1990 | { | |
1991 | struct ar9170 *ar = hw->priv; | |
1992 | ||
1993 | mutex_lock(&ar->mutex); | |
1994 | ar->vif = NULL; | |
1995 | ar->want_filter = 0; | |
1996 | ar9170_update_frame_filter(ar); | |
1997 | ar9170_set_beacon_timers(ar); | |
1998 | dev_kfree_skb(ar->beacon); | |
1999 | ar->beacon = NULL; | |
2000 | ar->sniffer_enabled = false; | |
2001 | ar->rx_software_decryption = false; | |
2002 | ar9170_set_operating_mode(ar); | |
2003 | mutex_unlock(&ar->mutex); | |
2004 | } | |
2005 | ||
2006 | static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed) | |
2007 | { | |
2008 | struct ar9170 *ar = hw->priv; | |
2009 | int err = 0; | |
2010 | ||
2011 | mutex_lock(&ar->mutex); | |
2012 | ||
e9348cdd CL |
2013 | if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) { |
2014 | /* TODO */ | |
2015 | err = 0; | |
2016 | } | |
2017 | ||
2018 | if (changed & IEEE80211_CONF_CHANGE_PS) { | |
2019 | /* TODO */ | |
2020 | err = 0; | |
2021 | } | |
2022 | ||
2023 | if (changed & IEEE80211_CONF_CHANGE_POWER) { | |
2024 | /* TODO */ | |
2025 | err = 0; | |
2026 | } | |
2027 | ||
2028 | if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) { | |
2029 | /* | |
2030 | * is it long_frame_max_tx_count or short_frame_max_tx_count? | |
2031 | */ | |
2032 | ||
2033 | err = ar9170_set_hwretry_limit(ar, | |
2034 | ar->hw->conf.long_frame_max_tx_count); | |
2035 | if (err) | |
2036 | goto out; | |
2037 | } | |
2038 | ||
57c4d7b4 | 2039 | if (changed & BSS_CHANGED_BEACON_INT) { |
e9348cdd CL |
2040 | err = ar9170_set_beacon_timers(ar); |
2041 | if (err) | |
2042 | goto out; | |
2043 | } | |
2044 | ||
2045 | if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { | |
29ceff5d CL |
2046 | |
2047 | /* adjust slot time for 5 GHz */ | |
2048 | err = ar9170_set_slot_time(ar); | |
2049 | if (err) | |
2050 | goto out; | |
2051 | ||
2052 | err = ar9170_set_dyn_sifs_ack(ar); | |
2053 | if (err) | |
2054 | goto out; | |
2055 | ||
e9348cdd | 2056 | err = ar9170_set_channel(ar, hw->conf.channel, |
9e52b062 JB |
2057 | AR9170_RFI_NONE, |
2058 | nl80211_to_ar9170(hw->conf.channel_type)); | |
e9348cdd CL |
2059 | if (err) |
2060 | goto out; | |
e9348cdd CL |
2061 | } |
2062 | ||
2063 | out: | |
2064 | mutex_unlock(&ar->mutex); | |
2065 | return err; | |
2066 | } | |
2067 | ||
e9348cdd CL |
2068 | static void ar9170_set_filters(struct work_struct *work) |
2069 | { | |
2070 | struct ar9170 *ar = container_of(work, struct ar9170, | |
2071 | filter_config_work); | |
2072 | int err; | |
2073 | ||
e9348cdd | 2074 | if (unlikely(!IS_STARTED(ar))) |
32c1628f | 2075 | return ; |
e9348cdd | 2076 | |
32c1628f | 2077 | mutex_lock(&ar->mutex); |
864cc02e CL |
2078 | if (test_and_clear_bit(AR9170_FILTER_CHANGED_MODE, |
2079 | &ar->filter_changed)) { | |
e9348cdd CL |
2080 | err = ar9170_set_operating_mode(ar); |
2081 | if (err) | |
2082 | goto unlock; | |
2083 | } | |
2084 | ||
864cc02e CL |
2085 | if (test_and_clear_bit(AR9170_FILTER_CHANGED_MULTICAST, |
2086 | &ar->filter_changed)) { | |
e9348cdd CL |
2087 | err = ar9170_update_multicast(ar); |
2088 | if (err) | |
2089 | goto unlock; | |
2090 | } | |
2091 | ||
864cc02e CL |
2092 | if (test_and_clear_bit(AR9170_FILTER_CHANGED_FRAMEFILTER, |
2093 | &ar->filter_changed)) { | |
e9348cdd | 2094 | err = ar9170_update_frame_filter(ar); |
864cc02e CL |
2095 | if (err) |
2096 | goto unlock; | |
2097 | } | |
e9348cdd CL |
2098 | |
2099 | unlock: | |
2100 | mutex_unlock(&ar->mutex); | |
2101 | } | |
2102 | ||
3ac64bee JB |
2103 | static u64 ar9170_op_prepare_multicast(struct ieee80211_hw *hw, int mc_count, |
2104 | struct dev_addr_list *mclist) | |
2105 | { | |
2106 | u64 mchash; | |
2107 | int i; | |
2108 | ||
2109 | /* always get broadcast frames */ | |
2110 | mchash = 1ULL << (0xff >> 2); | |
2111 | ||
2112 | for (i = 0; i < mc_count; i++) { | |
2113 | if (WARN_ON(!mclist)) | |
2114 | break; | |
2115 | mchash |= 1ULL << (mclist->dmi_addr[5] >> 2); | |
2116 | mclist = mclist->next; | |
2117 | } | |
2118 | ||
2119 | return mchash; | |
2120 | } | |
2121 | ||
e9348cdd CL |
2122 | static void ar9170_op_configure_filter(struct ieee80211_hw *hw, |
2123 | unsigned int changed_flags, | |
2124 | unsigned int *new_flags, | |
3ac64bee | 2125 | u64 multicast) |
e9348cdd CL |
2126 | { |
2127 | struct ar9170 *ar = hw->priv; | |
2128 | ||
2129 | /* mask supported flags */ | |
2130 | *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC | | |
cca84799 CL |
2131 | FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL; |
2132 | ar->filter_state = *new_flags; | |
e9348cdd CL |
2133 | /* |
2134 | * We can support more by setting the sniffer bit and | |
2135 | * then checking the error flags, later. | |
2136 | */ | |
2137 | ||
3ac64bee JB |
2138 | if (changed_flags & FIF_ALLMULTI && *new_flags & FIF_ALLMULTI) |
2139 | multicast = ~0ULL; | |
e9348cdd | 2140 | |
3ac64bee JB |
2141 | if (multicast != ar->want_mc_hash) { |
2142 | ar->want_mc_hash = multicast; | |
864cc02e | 2143 | set_bit(AR9170_FILTER_CHANGED_MULTICAST, &ar->filter_changed); |
e9348cdd CL |
2144 | } |
2145 | ||
2146 | if (changed_flags & FIF_CONTROL) { | |
2147 | u32 filter = AR9170_MAC_REG_FTF_PSPOLL | | |
2148 | AR9170_MAC_REG_FTF_RTS | | |
2149 | AR9170_MAC_REG_FTF_CTS | | |
2150 | AR9170_MAC_REG_FTF_ACK | | |
2151 | AR9170_MAC_REG_FTF_CFE | | |
2152 | AR9170_MAC_REG_FTF_CFE_ACK; | |
2153 | ||
2154 | if (*new_flags & FIF_CONTROL) | |
2155 | ar->want_filter = ar->cur_filter | filter; | |
2156 | else | |
2157 | ar->want_filter = ar->cur_filter & ~filter; | |
2158 | ||
864cc02e CL |
2159 | set_bit(AR9170_FILTER_CHANGED_FRAMEFILTER, |
2160 | &ar->filter_changed); | |
e9348cdd CL |
2161 | } |
2162 | ||
2163 | if (changed_flags & FIF_PROMISC_IN_BSS) { | |
2164 | ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0; | |
864cc02e CL |
2165 | set_bit(AR9170_FILTER_CHANGED_MODE, |
2166 | &ar->filter_changed); | |
e9348cdd CL |
2167 | } |
2168 | ||
2169 | if (likely(IS_STARTED(ar))) | |
42935eca | 2170 | ieee80211_queue_work(ar->hw, &ar->filter_config_work); |
e9348cdd CL |
2171 | } |
2172 | ||
2173 | static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw, | |
2174 | struct ieee80211_vif *vif, | |
2175 | struct ieee80211_bss_conf *bss_conf, | |
2176 | u32 changed) | |
2177 | { | |
2178 | struct ar9170 *ar = hw->priv; | |
2179 | int err = 0; | |
2180 | ||
2181 | mutex_lock(&ar->mutex); | |
2182 | ||
2d0ddec5 JB |
2183 | if (changed & BSS_CHANGED_BSSID) { |
2184 | memcpy(ar->bssid, bss_conf->bssid, ETH_ALEN); | |
2185 | err = ar9170_set_operating_mode(ar); | |
29ceff5d CL |
2186 | if (err) |
2187 | goto out; | |
2d0ddec5 JB |
2188 | } |
2189 | ||
2190 | if (changed & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED)) { | |
2191 | err = ar9170_update_beacon(ar); | |
29ceff5d CL |
2192 | if (err) |
2193 | goto out; | |
2d0ddec5 | 2194 | |
29ceff5d CL |
2195 | err = ar9170_set_beacon_timers(ar); |
2196 | if (err) | |
2197 | goto out; | |
2198 | } | |
e9348cdd CL |
2199 | |
2200 | if (changed & BSS_CHANGED_ASSOC) { | |
e9348cdd CL |
2201 | #ifndef CONFIG_AR9170_LEDS |
2202 | /* enable assoc LED. */ | |
2203 | err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0); | |
2204 | #endif /* CONFIG_AR9170_LEDS */ | |
2205 | } | |
2206 | ||
29ceff5d | 2207 | if (changed & BSS_CHANGED_BEACON_INT) { |
57c4d7b4 | 2208 | err = ar9170_set_beacon_timers(ar); |
29ceff5d CL |
2209 | if (err) |
2210 | goto out; | |
2211 | } | |
57c4d7b4 | 2212 | |
e9348cdd CL |
2213 | if (changed & BSS_CHANGED_HT) { |
2214 | /* TODO */ | |
2215 | err = 0; | |
2216 | } | |
2217 | ||
2218 | if (changed & BSS_CHANGED_ERP_SLOT) { | |
29ceff5d CL |
2219 | err = ar9170_set_slot_time(ar); |
2220 | if (err) | |
2221 | goto out; | |
e9348cdd CL |
2222 | } |
2223 | ||
2224 | if (changed & BSS_CHANGED_BASIC_RATES) { | |
29ceff5d CL |
2225 | err = ar9170_set_basic_rates(ar); |
2226 | if (err) | |
2227 | goto out; | |
e9348cdd CL |
2228 | } |
2229 | ||
29ceff5d | 2230 | out: |
e9348cdd CL |
2231 | mutex_unlock(&ar->mutex); |
2232 | } | |
2233 | ||
2234 | static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw) | |
2235 | { | |
2236 | struct ar9170 *ar = hw->priv; | |
2237 | int err; | |
2238 | u32 tsf_low; | |
2239 | u32 tsf_high; | |
2240 | u64 tsf; | |
2241 | ||
2242 | mutex_lock(&ar->mutex); | |
2243 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_L, &tsf_low); | |
2244 | if (!err) | |
2245 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_H, &tsf_high); | |
2246 | mutex_unlock(&ar->mutex); | |
2247 | ||
2248 | if (WARN_ON(err)) | |
2249 | return 0; | |
2250 | ||
2251 | tsf = tsf_high; | |
2252 | tsf = (tsf << 32) | tsf_low; | |
2253 | return tsf; | |
2254 | } | |
2255 | ||
2256 | static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, | |
2257 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, | |
2258 | struct ieee80211_key_conf *key) | |
2259 | { | |
2260 | struct ar9170 *ar = hw->priv; | |
2261 | int err = 0, i; | |
2262 | u8 ktype; | |
2263 | ||
2264 | if ((!ar->vif) || (ar->disable_offload)) | |
2265 | return -EOPNOTSUPP; | |
2266 | ||
2267 | switch (key->alg) { | |
2268 | case ALG_WEP: | |
e31a16d6 | 2269 | if (key->keylen == WLAN_KEY_LEN_WEP40) |
e9348cdd CL |
2270 | ktype = AR9170_ENC_ALG_WEP64; |
2271 | else | |
2272 | ktype = AR9170_ENC_ALG_WEP128; | |
2273 | break; | |
2274 | case ALG_TKIP: | |
2275 | ktype = AR9170_ENC_ALG_TKIP; | |
2276 | break; | |
2277 | case ALG_CCMP: | |
2278 | ktype = AR9170_ENC_ALG_AESCCMP; | |
2279 | break; | |
2280 | default: | |
2281 | return -EOPNOTSUPP; | |
2282 | } | |
2283 | ||
2284 | mutex_lock(&ar->mutex); | |
2285 | if (cmd == SET_KEY) { | |
2286 | if (unlikely(!IS_STARTED(ar))) { | |
2287 | err = -EOPNOTSUPP; | |
2288 | goto out; | |
2289 | } | |
2290 | ||
2291 | /* group keys need all-zeroes address */ | |
2292 | if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
2293 | sta = NULL; | |
2294 | ||
2295 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) { | |
2296 | for (i = 0; i < 64; i++) | |
2297 | if (!(ar->usedkeys & BIT(i))) | |
2298 | break; | |
2299 | if (i == 64) { | |
2300 | ar->rx_software_decryption = true; | |
2301 | ar9170_set_operating_mode(ar); | |
2302 | err = -ENOSPC; | |
2303 | goto out; | |
2304 | } | |
2305 | } else { | |
2306 | i = 64 + key->keyidx; | |
2307 | } | |
2308 | ||
2309 | key->hw_key_idx = i; | |
2310 | ||
2311 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0, | |
2312 | key->key, min_t(u8, 16, key->keylen)); | |
2313 | if (err) | |
2314 | goto out; | |
2315 | ||
2316 | if (key->alg == ALG_TKIP) { | |
2317 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, | |
2318 | ktype, 1, key->key + 16, 16); | |
2319 | if (err) | |
2320 | goto out; | |
2321 | ||
2322 | /* | |
2323 | * hardware is not capable generating the MMIC | |
2324 | * for fragmented frames! | |
2325 | */ | |
2326 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
2327 | } | |
2328 | ||
2329 | if (i < 64) | |
2330 | ar->usedkeys |= BIT(i); | |
2331 | ||
2332 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
2333 | } else { | |
2334 | if (unlikely(!IS_STARTED(ar))) { | |
2335 | /* The device is gone... together with the key ;-) */ | |
2336 | err = 0; | |
2337 | goto out; | |
2338 | } | |
2339 | ||
2340 | err = ar9170_disable_key(ar, key->hw_key_idx); | |
2341 | if (err) | |
2342 | goto out; | |
2343 | ||
2344 | if (key->hw_key_idx < 64) { | |
2345 | ar->usedkeys &= ~BIT(key->hw_key_idx); | |
2346 | } else { | |
2347 | err = ar9170_upload_key(ar, key->hw_key_idx, NULL, | |
2348 | AR9170_ENC_ALG_NONE, 0, | |
2349 | NULL, 0); | |
2350 | if (err) | |
2351 | goto out; | |
2352 | ||
2353 | if (key->alg == ALG_TKIP) { | |
2354 | err = ar9170_upload_key(ar, key->hw_key_idx, | |
2355 | NULL, | |
2356 | AR9170_ENC_ALG_NONE, 1, | |
2357 | NULL, 0); | |
2358 | if (err) | |
2359 | goto out; | |
2360 | } | |
2361 | ||
2362 | } | |
2363 | } | |
2364 | ||
2365 | ar9170_regwrite_begin(ar); | |
2366 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys); | |
2367 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32); | |
2368 | ar9170_regwrite_finish(); | |
2369 | err = ar9170_regwrite_result(); | |
2370 | ||
2371 | out: | |
2372 | mutex_unlock(&ar->mutex); | |
2373 | ||
2374 | return err; | |
2375 | } | |
2376 | ||
2377 | static void ar9170_sta_notify(struct ieee80211_hw *hw, | |
2378 | struct ieee80211_vif *vif, | |
2379 | enum sta_notify_cmd cmd, | |
2380 | struct ieee80211_sta *sta) | |
2381 | { | |
acbadf01 CL |
2382 | struct ar9170 *ar = hw->priv; |
2383 | struct ar9170_sta_info *sta_info = (void *) sta->drv_priv; | |
2384 | unsigned int i; | |
2385 | ||
2386 | switch (cmd) { | |
2387 | case STA_NOTIFY_ADD: | |
2388 | memset(sta_info, 0, sizeof(*sta_info)); | |
2389 | ||
2390 | if (!sta->ht_cap.ht_supported) | |
2391 | break; | |
2392 | ||
2393 | if (sta->ht_cap.ampdu_density > ar->global_ampdu_density) | |
2394 | ar->global_ampdu_density = sta->ht_cap.ampdu_density; | |
2395 | ||
2396 | if (sta->ht_cap.ampdu_factor < ar->global_ampdu_factor) | |
2397 | ar->global_ampdu_factor = sta->ht_cap.ampdu_factor; | |
2398 | ||
2399 | for (i = 0; i < AR9170_NUM_TID; i++) { | |
2400 | sta_info->agg[i].state = AR9170_TID_STATE_SHUTDOWN; | |
2401 | sta_info->agg[i].active = false; | |
2402 | sta_info->agg[i].ssn = 0; | |
2403 | sta_info->agg[i].retry = 0; | |
2404 | sta_info->agg[i].tid = i; | |
2405 | INIT_LIST_HEAD(&sta_info->agg[i].list); | |
2406 | skb_queue_head_init(&sta_info->agg[i].queue); | |
2407 | } | |
2408 | ||
2409 | sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor); | |
2410 | break; | |
2411 | ||
2412 | case STA_NOTIFY_REMOVE: | |
2413 | if (!sta->ht_cap.ht_supported) | |
2414 | break; | |
2415 | ||
2416 | for (i = 0; i < AR9170_NUM_TID; i++) { | |
2417 | sta_info->agg[i].state = AR9170_TID_STATE_INVALID; | |
2418 | skb_queue_purge(&sta_info->agg[i].queue); | |
2419 | } | |
2420 | ||
2421 | break; | |
2422 | ||
2423 | default: | |
2424 | break; | |
2425 | } | |
2426 | ||
2427 | if (IS_STARTED(ar) && ar->filter_changed) | |
42935eca | 2428 | ieee80211_queue_work(ar->hw, &ar->filter_config_work); |
e9348cdd CL |
2429 | } |
2430 | ||
2431 | static int ar9170_get_stats(struct ieee80211_hw *hw, | |
2432 | struct ieee80211_low_level_stats *stats) | |
2433 | { | |
2434 | struct ar9170 *ar = hw->priv; | |
2435 | u32 val; | |
2436 | int err; | |
2437 | ||
2438 | mutex_lock(&ar->mutex); | |
2439 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val); | |
2440 | ar->stats.dot11ACKFailureCount += val; | |
2441 | ||
2442 | memcpy(stats, &ar->stats, sizeof(*stats)); | |
2443 | mutex_unlock(&ar->mutex); | |
2444 | ||
2445 | return 0; | |
2446 | } | |
2447 | ||
2448 | static int ar9170_get_tx_stats(struct ieee80211_hw *hw, | |
2449 | struct ieee80211_tx_queue_stats *tx_stats) | |
2450 | { | |
2451 | struct ar9170 *ar = hw->priv; | |
2452 | ||
2453 | spin_lock_bh(&ar->tx_stats_lock); | |
2454 | memcpy(tx_stats, ar->tx_stats, sizeof(tx_stats[0]) * hw->queues); | |
2455 | spin_unlock_bh(&ar->tx_stats_lock); | |
2456 | ||
2457 | return 0; | |
2458 | } | |
2459 | ||
2460 | static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue, | |
2461 | const struct ieee80211_tx_queue_params *param) | |
2462 | { | |
2463 | struct ar9170 *ar = hw->priv; | |
2464 | int ret; | |
2465 | ||
2466 | mutex_lock(&ar->mutex); | |
e9d126cd | 2467 | if (queue < __AR9170_NUM_TXQ) { |
e9348cdd CL |
2468 | memcpy(&ar->edcf[ar9170_qos_hwmap[queue]], |
2469 | param, sizeof(*param)); | |
2470 | ||
2471 | ret = ar9170_set_qos(ar); | |
e9d126cd | 2472 | } else { |
e9348cdd | 2473 | ret = -EINVAL; |
e9d126cd | 2474 | } |
e9348cdd CL |
2475 | |
2476 | mutex_unlock(&ar->mutex); | |
2477 | return ret; | |
2478 | } | |
2479 | ||
9e52b062 JB |
2480 | static int ar9170_ampdu_action(struct ieee80211_hw *hw, |
2481 | enum ieee80211_ampdu_mlme_action action, | |
2482 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) | |
2483 | { | |
acbadf01 CL |
2484 | struct ar9170 *ar = hw->priv; |
2485 | struct ar9170_sta_info *sta_info = (void *) sta->drv_priv; | |
2486 | struct ar9170_sta_tid *tid_info = &sta_info->agg[tid]; | |
2487 | unsigned long flags; | |
2488 | ||
2489 | if (!modparam_ht) | |
2490 | return -EOPNOTSUPP; | |
2491 | ||
9e52b062 | 2492 | switch (action) { |
acbadf01 CL |
2493 | case IEEE80211_AMPDU_TX_START: |
2494 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
2495 | if (tid_info->state != AR9170_TID_STATE_SHUTDOWN || | |
2496 | !list_empty(&tid_info->list)) { | |
2497 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
2498 | #ifdef AR9170_TXAGG_DEBUG | |
2499 | printk(KERN_INFO "%s: A-MPDU [ESS:[%pM] tid:[%d]] " | |
2500 | "is in a very bad state!\n", | |
2501 | wiphy_name(hw->wiphy), sta->addr, tid); | |
2502 | #endif /* AR9170_TXAGG_DEBUG */ | |
2503 | return -EBUSY; | |
2504 | } | |
2505 | ||
2506 | *ssn = tid_info->ssn; | |
2507 | tid_info->state = AR9170_TID_STATE_PROGRESS; | |
2508 | tid_info->active = false; | |
2509 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
2510 | ieee80211_start_tx_ba_cb_irqsafe(hw, sta->addr, tid); | |
2511 | break; | |
2512 | ||
2513 | case IEEE80211_AMPDU_TX_STOP: | |
2514 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
2515 | tid_info->state = AR9170_TID_STATE_SHUTDOWN; | |
2516 | list_del_init(&tid_info->list); | |
2517 | tid_info->active = false; | |
2518 | skb_queue_purge(&tid_info->queue); | |
2519 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
2520 | ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid); | |
2521 | break; | |
2522 | ||
2523 | case IEEE80211_AMPDU_TX_OPERATIONAL: | |
2524 | #ifdef AR9170_TXAGG_DEBUG | |
2525 | printk(KERN_INFO "%s: A-MPDU for %pM [tid:%d] Operational.\n", | |
2526 | wiphy_name(hw->wiphy), sta->addr, tid); | |
2527 | #endif /* AR9170_TXAGG_DEBUG */ | |
2528 | spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags); | |
2529 | sta_info->agg[tid].state = AR9170_TID_STATE_COMPLETE; | |
2530 | spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags); | |
2531 | break; | |
2532 | ||
9e52b062 JB |
2533 | case IEEE80211_AMPDU_RX_START: |
2534 | case IEEE80211_AMPDU_RX_STOP: | |
acbadf01 CL |
2535 | /* Handled by firmware */ |
2536 | break; | |
2537 | ||
9e52b062 JB |
2538 | default: |
2539 | return -EOPNOTSUPP; | |
2540 | } | |
acbadf01 CL |
2541 | |
2542 | return 0; | |
9e52b062 JB |
2543 | } |
2544 | ||
e9348cdd CL |
2545 | static const struct ieee80211_ops ar9170_ops = { |
2546 | .start = ar9170_op_start, | |
2547 | .stop = ar9170_op_stop, | |
2548 | .tx = ar9170_op_tx, | |
2549 | .add_interface = ar9170_op_add_interface, | |
2550 | .remove_interface = ar9170_op_remove_interface, | |
2551 | .config = ar9170_op_config, | |
3ac64bee | 2552 | .prepare_multicast = ar9170_op_prepare_multicast, |
e9348cdd CL |
2553 | .configure_filter = ar9170_op_configure_filter, |
2554 | .conf_tx = ar9170_conf_tx, | |
2555 | .bss_info_changed = ar9170_op_bss_info_changed, | |
2556 | .get_tsf = ar9170_op_get_tsf, | |
2557 | .set_key = ar9170_set_key, | |
2558 | .sta_notify = ar9170_sta_notify, | |
2559 | .get_stats = ar9170_get_stats, | |
2560 | .get_tx_stats = ar9170_get_tx_stats, | |
9e52b062 | 2561 | .ampdu_action = ar9170_ampdu_action, |
e9348cdd CL |
2562 | }; |
2563 | ||
2564 | void *ar9170_alloc(size_t priv_size) | |
2565 | { | |
2566 | struct ieee80211_hw *hw; | |
2567 | struct ar9170 *ar; | |
cca84799 | 2568 | struct sk_buff *skb; |
e9348cdd CL |
2569 | int i; |
2570 | ||
cca84799 CL |
2571 | /* |
2572 | * this buffer is used for rx stream reconstruction. | |
2573 | * Under heavy load this device (or the transport layer?) | |
2574 | * tends to split the streams into seperate rx descriptors. | |
2575 | */ | |
2576 | ||
2577 | skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL); | |
2578 | if (!skb) | |
2579 | goto err_nomem; | |
2580 | ||
e9348cdd CL |
2581 | hw = ieee80211_alloc_hw(priv_size, &ar9170_ops); |
2582 | if (!hw) | |
cca84799 | 2583 | goto err_nomem; |
e9348cdd CL |
2584 | |
2585 | ar = hw->priv; | |
2586 | ar->hw = hw; | |
cca84799 | 2587 | ar->rx_failover = skb; |
e9348cdd CL |
2588 | |
2589 | mutex_init(&ar->mutex); | |
2590 | spin_lock_init(&ar->cmdlock); | |
2591 | spin_lock_init(&ar->tx_stats_lock); | |
acbadf01 CL |
2592 | spin_lock_init(&ar->tx_ampdu_list_lock); |
2593 | skb_queue_head_init(&ar->tx_status_ampdu); | |
9b9c5aae CL |
2594 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { |
2595 | skb_queue_head_init(&ar->tx_status[i]); | |
2596 | skb_queue_head_init(&ar->tx_pending[i]); | |
2597 | } | |
cca84799 | 2598 | ar9170_rx_reset_rx_mpdu(ar); |
e9348cdd CL |
2599 | INIT_WORK(&ar->filter_config_work, ar9170_set_filters); |
2600 | INIT_WORK(&ar->beacon_work, ar9170_new_beacon); | |
9b9c5aae | 2601 | INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor); |
acbadf01 | 2602 | INIT_LIST_HEAD(&ar->tx_ampdu_list); |
e9348cdd CL |
2603 | |
2604 | /* all hw supports 2.4 GHz, so set channel to 1 by default */ | |
2605 | ar->channel = &ar9170_2ghz_chantable[0]; | |
2606 | ||
2607 | /* first part of wiphy init */ | |
2608 | ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | | |
2609 | BIT(NL80211_IFTYPE_WDS) | | |
2610 | BIT(NL80211_IFTYPE_ADHOC); | |
2611 | ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS | | |
2612 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | | |
2613 | IEEE80211_HW_SIGNAL_DBM | | |
2614 | IEEE80211_HW_NOISE_DBM; | |
2615 | ||
acbadf01 CL |
2616 | if (modparam_ht) { |
2617 | ar->hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION; | |
2618 | } else { | |
2619 | ar9170_band_2GHz.ht_cap.ht_supported = false; | |
2620 | ar9170_band_5GHz.ht_cap.ht_supported = false; | |
2621 | } | |
2622 | ||
4a48e2a4 | 2623 | ar->hw->queues = __AR9170_NUM_TXQ; |
e9348cdd CL |
2624 | ar->hw->extra_tx_headroom = 8; |
2625 | ar->hw->sta_data_size = sizeof(struct ar9170_sta_info); | |
2626 | ||
2627 | ar->hw->max_rates = 1; | |
2628 | ar->hw->max_rate_tries = 3; | |
2629 | ||
2630 | for (i = 0; i < ARRAY_SIZE(ar->noise); i++) | |
2631 | ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ | |
2632 | ||
2633 | return ar; | |
cca84799 CL |
2634 | |
2635 | err_nomem: | |
2636 | kfree_skb(skb); | |
2637 | return ERR_PTR(-ENOMEM); | |
e9348cdd | 2638 | } |
e9348cdd CL |
2639 | |
2640 | static int ar9170_read_eeprom(struct ar9170 *ar) | |
2641 | { | |
2642 | #define RW 8 /* number of words to read at once */ | |
2643 | #define RB (sizeof(u32) * RW) | |
e9348cdd CL |
2644 | u8 *eeprom = (void *)&ar->eeprom; |
2645 | u8 *addr = ar->eeprom.mac_address; | |
2646 | __le32 offsets[RW]; | |
acbadf01 | 2647 | unsigned int rx_streams, tx_streams, tx_params = 0; |
e9348cdd CL |
2648 | int i, j, err, bands = 0; |
2649 | ||
2650 | BUILD_BUG_ON(sizeof(ar->eeprom) & 3); | |
2651 | ||
2652 | BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4); | |
2653 | #ifndef __CHECKER__ | |
2654 | /* don't want to handle trailing remains */ | |
2655 | BUILD_BUG_ON(sizeof(ar->eeprom) % RB); | |
2656 | #endif | |
2657 | ||
2658 | for (i = 0; i < sizeof(ar->eeprom)/RB; i++) { | |
2659 | for (j = 0; j < RW; j++) | |
2660 | offsets[j] = cpu_to_le32(AR9170_EEPROM_START + | |
2661 | RB * i + 4 * j); | |
2662 | ||
2663 | err = ar->exec_cmd(ar, AR9170_CMD_RREG, | |
2664 | RB, (u8 *) &offsets, | |
2665 | RB, eeprom + RB * i); | |
2666 | if (err) | |
2667 | return err; | |
2668 | } | |
2669 | ||
2670 | #undef RW | |
2671 | #undef RB | |
2672 | ||
2673 | if (ar->eeprom.length == cpu_to_le16(0xFFFF)) | |
2674 | return -ENODATA; | |
2675 | ||
2676 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { | |
2677 | ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz; | |
2678 | bands++; | |
2679 | } | |
2680 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { | |
2681 | ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz; | |
2682 | bands++; | |
2683 | } | |
acbadf01 CL |
2684 | |
2685 | rx_streams = hweight8(ar->eeprom.rx_mask); | |
2686 | tx_streams = hweight8(ar->eeprom.tx_mask); | |
2687 | ||
2688 | if (rx_streams != tx_streams) | |
2689 | tx_params = IEEE80211_HT_MCS_TX_RX_DIFF; | |
2690 | ||
2691 | if (tx_streams >= 1 && tx_streams <= IEEE80211_HT_MCS_TX_MAX_STREAMS) | |
2692 | tx_params = (tx_streams - 1) << | |
2693 | IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; | |
2694 | ||
2695 | ar9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params; | |
2696 | ar9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params; | |
2697 | ||
e9348cdd CL |
2698 | /* |
2699 | * I measured this, a bandswitch takes roughly | |
2700 | * 135 ms and a frequency switch about 80. | |
2701 | * | |
2702 | * FIXME: measure these values again once EEPROM settings | |
2703 | * are used, that will influence them! | |
2704 | */ | |
2705 | if (bands == 2) | |
2706 | ar->hw->channel_change_time = 135 * 1000; | |
2707 | else | |
2708 | ar->hw->channel_change_time = 80 * 1000; | |
2709 | ||
1878f77e CL |
2710 | ar->regulatory.current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); |
2711 | ar->regulatory.current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]); | |
2712 | ||
e9348cdd CL |
2713 | /* second part of wiphy init */ |
2714 | SET_IEEE80211_PERM_ADDR(ar->hw, addr); | |
2715 | ||
2716 | return bands ? 0 : -EINVAL; | |
2717 | } | |
2718 | ||
1878f77e CL |
2719 | static int ar9170_reg_notifier(struct wiphy *wiphy, |
2720 | struct regulatory_request *request) | |
2721 | { | |
2722 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); | |
2723 | struct ar9170 *ar = hw->priv; | |
2724 | ||
2725 | return ath_reg_notifier_apply(wiphy, request, &ar->regulatory); | |
2726 | } | |
2727 | ||
e9348cdd CL |
2728 | int ar9170_register(struct ar9170 *ar, struct device *pdev) |
2729 | { | |
2730 | int err; | |
2731 | ||
2732 | /* try to read EEPROM, init MAC addr */ | |
2733 | err = ar9170_read_eeprom(ar); | |
2734 | if (err) | |
2735 | goto err_out; | |
2736 | ||
1878f77e CL |
2737 | err = ath_regd_init(&ar->regulatory, ar->hw->wiphy, |
2738 | ar9170_reg_notifier); | |
85efc86e LR |
2739 | if (err) |
2740 | goto err_out; | |
1878f77e | 2741 | |
e9348cdd CL |
2742 | err = ieee80211_register_hw(ar->hw); |
2743 | if (err) | |
2744 | goto err_out; | |
2745 | ||
1878f77e CL |
2746 | if (!ath_is_world_regd(&ar->regulatory)) |
2747 | regulatory_hint(ar->hw->wiphy, ar->regulatory.alpha2); | |
2748 | ||
e9348cdd CL |
2749 | err = ar9170_init_leds(ar); |
2750 | if (err) | |
2751 | goto err_unreg; | |
2752 | ||
2753 | #ifdef CONFIG_AR9170_LEDS | |
2754 | err = ar9170_register_leds(ar); | |
2755 | if (err) | |
2756 | goto err_unreg; | |
2757 | #endif /* CONFIG_AR9170_LEDS */ | |
2758 | ||
2759 | dev_info(pdev, "Atheros AR9170 is registered as '%s'\n", | |
2760 | wiphy_name(ar->hw->wiphy)); | |
2761 | ||
2762 | return err; | |
2763 | ||
2764 | err_unreg: | |
2765 | ieee80211_unregister_hw(ar->hw); | |
2766 | ||
2767 | err_out: | |
2768 | return err; | |
2769 | } | |
e9348cdd CL |
2770 | |
2771 | void ar9170_unregister(struct ar9170 *ar) | |
2772 | { | |
2773 | #ifdef CONFIG_AR9170_LEDS | |
2774 | ar9170_unregister_leds(ar); | |
2775 | #endif /* CONFIG_AR9170_LEDS */ | |
2776 | ||
cca84799 | 2777 | kfree_skb(ar->rx_failover); |
e9348cdd CL |
2778 | ieee80211_unregister_hw(ar->hw); |
2779 | mutex_destroy(&ar->mutex); | |
2780 | } |