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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 CL |
51 | |
52 | #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \ | |
53 | .bitrate = (_bitrate), \ | |
54 | .flags = (_flags), \ | |
55 | .hw_value = (_hw_rate) | (_txpidx) << 4, \ | |
56 | } | |
57 | ||
58 | static struct ieee80211_rate __ar9170_ratetable[] = { | |
59 | RATE(10, 0, 0, 0), | |
60 | RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE), | |
61 | RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE), | |
62 | RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE), | |
63 | RATE(60, 0xb, 0, 0), | |
64 | RATE(90, 0xf, 0, 0), | |
65 | RATE(120, 0xa, 0, 0), | |
66 | RATE(180, 0xe, 0, 0), | |
67 | RATE(240, 0x9, 0, 0), | |
68 | RATE(360, 0xd, 1, 0), | |
69 | RATE(480, 0x8, 2, 0), | |
70 | RATE(540, 0xc, 3, 0), | |
71 | }; | |
72 | #undef RATE | |
73 | ||
74 | #define ar9170_g_ratetable (__ar9170_ratetable + 0) | |
75 | #define ar9170_g_ratetable_size 12 | |
76 | #define ar9170_a_ratetable (__ar9170_ratetable + 4) | |
77 | #define ar9170_a_ratetable_size 8 | |
78 | ||
79 | /* | |
80 | * NB: The hw_value is used as an index into the ar9170_phy_freq_params | |
81 | * array in phy.c so that we don't have to do frequency lookups! | |
82 | */ | |
83 | #define CHAN(_freq, _idx) { \ | |
84 | .center_freq = (_freq), \ | |
85 | .hw_value = (_idx), \ | |
86 | .max_power = 18, /* XXX */ \ | |
87 | } | |
88 | ||
89 | static struct ieee80211_channel ar9170_2ghz_chantable[] = { | |
90 | CHAN(2412, 0), | |
91 | CHAN(2417, 1), | |
92 | CHAN(2422, 2), | |
93 | CHAN(2427, 3), | |
94 | CHAN(2432, 4), | |
95 | CHAN(2437, 5), | |
96 | CHAN(2442, 6), | |
97 | CHAN(2447, 7), | |
98 | CHAN(2452, 8), | |
99 | CHAN(2457, 9), | |
100 | CHAN(2462, 10), | |
101 | CHAN(2467, 11), | |
102 | CHAN(2472, 12), | |
103 | CHAN(2484, 13), | |
104 | }; | |
105 | ||
106 | static struct ieee80211_channel ar9170_5ghz_chantable[] = { | |
107 | CHAN(4920, 14), | |
108 | CHAN(4940, 15), | |
109 | CHAN(4960, 16), | |
110 | CHAN(4980, 17), | |
111 | CHAN(5040, 18), | |
112 | CHAN(5060, 19), | |
113 | CHAN(5080, 20), | |
114 | CHAN(5180, 21), | |
115 | CHAN(5200, 22), | |
116 | CHAN(5220, 23), | |
117 | CHAN(5240, 24), | |
118 | CHAN(5260, 25), | |
119 | CHAN(5280, 26), | |
120 | CHAN(5300, 27), | |
121 | CHAN(5320, 28), | |
122 | CHAN(5500, 29), | |
123 | CHAN(5520, 30), | |
124 | CHAN(5540, 31), | |
125 | CHAN(5560, 32), | |
126 | CHAN(5580, 33), | |
127 | CHAN(5600, 34), | |
128 | CHAN(5620, 35), | |
129 | CHAN(5640, 36), | |
130 | CHAN(5660, 37), | |
131 | CHAN(5680, 38), | |
132 | CHAN(5700, 39), | |
133 | CHAN(5745, 40), | |
134 | CHAN(5765, 41), | |
135 | CHAN(5785, 42), | |
136 | CHAN(5805, 43), | |
137 | CHAN(5825, 44), | |
138 | CHAN(5170, 45), | |
139 | CHAN(5190, 46), | |
140 | CHAN(5210, 47), | |
141 | CHAN(5230, 48), | |
142 | }; | |
143 | #undef CHAN | |
144 | ||
9e52b062 JB |
145 | #define AR9170_HT_CAP \ |
146 | { \ | |
147 | .ht_supported = true, \ | |
148 | .cap = IEEE80211_HT_CAP_MAX_AMSDU | \ | |
9e52b062 JB |
149 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \ |
150 | IEEE80211_HT_CAP_SGI_40 | \ | |
151 | IEEE80211_HT_CAP_DSSSCCK40 | \ | |
152 | IEEE80211_HT_CAP_SM_PS, \ | |
083c4687 CL |
153 | .ampdu_factor = 3, \ |
154 | .ampdu_density = 6, \ | |
9e52b062 JB |
155 | .mcs = { \ |
156 | .rx_mask = { 0xFF, 0xFF, 0, 0, 0, 0, 0, 0, 0, 0, }, \ | |
157 | }, \ | |
158 | } | |
159 | ||
e9348cdd CL |
160 | static struct ieee80211_supported_band ar9170_band_2GHz = { |
161 | .channels = ar9170_2ghz_chantable, | |
162 | .n_channels = ARRAY_SIZE(ar9170_2ghz_chantable), | |
163 | .bitrates = ar9170_g_ratetable, | |
164 | .n_bitrates = ar9170_g_ratetable_size, | |
9e52b062 JB |
165 | .ht_cap = AR9170_HT_CAP, |
166 | }; | |
167 | ||
168 | static struct ieee80211_supported_band ar9170_band_5GHz = { | |
169 | .channels = ar9170_5ghz_chantable, | |
170 | .n_channels = ARRAY_SIZE(ar9170_5ghz_chantable), | |
171 | .bitrates = ar9170_a_ratetable, | |
172 | .n_bitrates = ar9170_a_ratetable_size, | |
173 | .ht_cap = AR9170_HT_CAP, | |
e9348cdd CL |
174 | }; |
175 | ||
9b9c5aae | 176 | static void ar9170_tx(struct ar9170 *ar); |
e9348cdd | 177 | |
9b9c5aae | 178 | #ifdef AR9170_QUEUE_DEBUG |
e9348cdd CL |
179 | static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb) |
180 | { | |
181 | struct ar9170_tx_control *txc = (void *) skb->data; | |
9b9c5aae CL |
182 | struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); |
183 | struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data; | |
184 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
e9348cdd | 185 | |
9b9c5aae CL |
186 | printk(KERN_DEBUG "%s: => FRAME [skb:%p, q:%d, DA:[%pM] flags:%x " |
187 | "mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n", | |
e9348cdd | 188 | wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb), |
9b9c5aae CL |
189 | ieee80211_get_DA(hdr), arinfo->flags, |
190 | le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control), | |
191 | jiffies_to_msecs(arinfo->timeout - jiffies)); | |
e9348cdd CL |
192 | } |
193 | ||
9b9c5aae CL |
194 | static void __ar9170_dump_txqueue(struct ar9170 *ar, |
195 | struct sk_buff_head *queue) | |
e9348cdd CL |
196 | { |
197 | struct sk_buff *skb; | |
198 | int i = 0; | |
199 | ||
200 | printk(KERN_DEBUG "---[ cut here ]---\n"); | |
9b9c5aae | 201 | printk(KERN_DEBUG "%s: %d entries in queue.\n", |
e9348cdd CL |
202 | wiphy_name(ar->hw->wiphy), skb_queue_len(queue)); |
203 | ||
204 | skb_queue_walk(queue, skb) { | |
9b9c5aae | 205 | printk(KERN_DEBUG "index:%d => \n", i++); |
e9348cdd CL |
206 | ar9170_print_txheader(ar, skb); |
207 | } | |
9b9c5aae CL |
208 | if (i != skb_queue_len(queue)) |
209 | printk(KERN_DEBUG "WARNING: queue frame counter " | |
210 | "mismatch %d != %d\n", skb_queue_len(queue), i); | |
e9348cdd CL |
211 | printk(KERN_DEBUG "---[ end ]---\n"); |
212 | } | |
e9348cdd | 213 | |
9b9c5aae CL |
214 | static void ar9170_dump_txqueue(struct ar9170 *ar, |
215 | struct sk_buff_head *queue) | |
216 | { | |
217 | unsigned long flags; | |
218 | ||
219 | spin_lock_irqsave(&queue->lock, flags); | |
220 | __ar9170_dump_txqueue(ar, queue); | |
221 | spin_unlock_irqrestore(&queue->lock, flags); | |
222 | } | |
223 | ||
224 | static void __ar9170_dump_txstats(struct ar9170 *ar) | |
225 | { | |
226 | int i; | |
227 | ||
228 | printk(KERN_DEBUG "%s: QoS queue stats\n", | |
229 | wiphy_name(ar->hw->wiphy)); | |
230 | ||
231 | for (i = 0; i < __AR9170_NUM_TXQ; i++) | |
232 | printk(KERN_DEBUG "%s: queue:%d limit:%d len:%d waitack:%d\n", | |
233 | wiphy_name(ar->hw->wiphy), i, ar->tx_stats[i].limit, | |
234 | ar->tx_stats[i].len, skb_queue_len(&ar->tx_status[i])); | |
235 | } | |
236 | ||
237 | static void ar9170_dump_txstats(struct ar9170 *ar) | |
e9348cdd | 238 | { |
e9348cdd CL |
239 | unsigned long flags; |
240 | ||
241 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
9b9c5aae | 242 | __ar9170_dump_txstats(ar); |
e9348cdd | 243 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); |
9b9c5aae CL |
244 | } |
245 | #endif /* AR9170_QUEUE_DEBUG */ | |
246 | ||
247 | /* caller must guarantee exclusive access for _bin_ queue. */ | |
248 | static void ar9170_recycle_expired(struct ar9170 *ar, | |
249 | struct sk_buff_head *queue, | |
250 | struct sk_buff_head *bin) | |
251 | { | |
252 | struct sk_buff *skb, *old = NULL; | |
253 | unsigned long flags; | |
254 | ||
255 | spin_lock_irqsave(&queue->lock, flags); | |
256 | while ((skb = skb_peek(queue))) { | |
257 | struct ieee80211_tx_info *txinfo; | |
258 | struct ar9170_tx_info *arinfo; | |
259 | ||
260 | txinfo = IEEE80211_SKB_CB(skb); | |
261 | arinfo = (void *) txinfo->rate_driver_data; | |
262 | ||
263 | if (time_is_before_jiffies(arinfo->timeout)) { | |
264 | #ifdef AR9170_QUEUE_DEBUG | |
265 | printk(KERN_DEBUG "%s: [%ld > %ld] frame expired => " | |
266 | "recycle \n", wiphy_name(ar->hw->wiphy), | |
267 | jiffies, arinfo->timeout); | |
268 | ar9170_print_txheader(ar, skb); | |
269 | #endif /* AR9170_QUEUE_DEBUG */ | |
270 | __skb_unlink(skb, queue); | |
271 | __skb_queue_tail(bin, skb); | |
272 | } else { | |
273 | break; | |
274 | } | |
275 | ||
276 | if (unlikely(old == skb)) { | |
277 | /* bail out - queue is shot. */ | |
278 | ||
279 | WARN_ON(1); | |
280 | break; | |
281 | } | |
282 | old = skb; | |
283 | } | |
284 | spin_unlock_irqrestore(&queue->lock, flags); | |
285 | } | |
286 | ||
287 | static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb, | |
288 | u16 tx_status) | |
289 | { | |
290 | struct ieee80211_tx_info *txinfo; | |
291 | unsigned int retries = 0; | |
e9348cdd CL |
292 | |
293 | txinfo = IEEE80211_SKB_CB(skb); | |
294 | ieee80211_tx_info_clear_status(txinfo); | |
295 | ||
296 | switch (tx_status) { | |
297 | case AR9170_TX_STATUS_RETRY: | |
298 | retries = 2; | |
299 | case AR9170_TX_STATUS_COMPLETE: | |
300 | txinfo->flags |= IEEE80211_TX_STAT_ACK; | |
301 | break; | |
302 | ||
303 | case AR9170_TX_STATUS_FAILED: | |
304 | retries = ar->hw->conf.long_frame_max_tx_count; | |
305 | break; | |
306 | ||
307 | default: | |
308 | printk(KERN_ERR "%s: invalid tx_status response (%x).\n", | |
309 | wiphy_name(ar->hw->wiphy), tx_status); | |
310 | break; | |
311 | } | |
312 | ||
9b9c5aae | 313 | txinfo->status.rates[0].count = retries + 1; |
e9348cdd CL |
314 | skb_pull(skb, sizeof(struct ar9170_tx_control)); |
315 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
316 | } | |
e9348cdd | 317 | |
9b9c5aae | 318 | void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb) |
e9348cdd | 319 | { |
9b9c5aae CL |
320 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
321 | struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data; | |
322 | unsigned int queue = skb_get_queue_mapping(skb); | |
e9348cdd | 323 | unsigned long flags; |
e9348cdd | 324 | |
9b9c5aae CL |
325 | spin_lock_irqsave(&ar->tx_stats_lock, flags); |
326 | ar->tx_stats[queue].len--; | |
e9348cdd | 327 | |
9b9c5aae CL |
328 | if (skb_queue_empty(&ar->tx_pending[queue])) { |
329 | #ifdef AR9170_QUEUE_STOP_DEBUG | |
330 | printk(KERN_DEBUG "%s: wake queue %d\n", | |
331 | wiphy_name(ar->hw->wiphy), queue); | |
332 | __ar9170_dump_txstats(ar); | |
333 | #endif /* AR9170_QUEUE_STOP_DEBUG */ | |
334 | ieee80211_wake_queue(ar->hw, queue); | |
335 | } | |
336 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
e9348cdd | 337 | |
9b9c5aae CL |
338 | if (arinfo->flags & AR9170_TX_FLAG_BLOCK_ACK) { |
339 | dev_kfree_skb_any(skb); | |
340 | } else if (arinfo->flags & AR9170_TX_FLAG_WAIT_FOR_ACK) { | |
341 | arinfo->timeout = jiffies + | |
342 | msecs_to_jiffies(AR9170_TX_TIMEOUT); | |
343 | ||
344 | skb_queue_tail(&ar->tx_status[queue], skb); | |
345 | } else if (arinfo->flags & AR9170_TX_FLAG_NO_ACK) { | |
346 | ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED); | |
347 | } else { | |
348 | #ifdef AR9170_QUEUE_DEBUG | |
349 | printk(KERN_DEBUG "%s: unsupported frame flags!\n", | |
350 | wiphy_name(ar->hw->wiphy)); | |
351 | ar9170_print_txheader(ar, skb); | |
352 | #endif /* AR9170_QUEUE_DEBUG */ | |
353 | dev_kfree_skb_any(skb); | |
354 | } | |
355 | ||
356 | if (!ar->tx_stats[queue].len && | |
357 | !skb_queue_empty(&ar->tx_pending[queue])) { | |
358 | ar9170_tx(ar); | |
e9348cdd | 359 | } |
e9348cdd CL |
360 | } |
361 | ||
9b9c5aae CL |
362 | static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar, |
363 | const u8 *mac, | |
364 | struct sk_buff_head *queue, | |
365 | const u32 rate) | |
e9348cdd | 366 | { |
9b9c5aae | 367 | unsigned long flags; |
e9348cdd CL |
368 | struct sk_buff *skb; |
369 | ||
370 | /* | |
371 | * Unfortunately, the firmware does not tell to which (queued) frame | |
372 | * this transmission status report belongs to. | |
373 | * | |
374 | * So we have to make risky guesses - with the scarce information | |
375 | * the firmware provided (-> destination MAC, and phy_control) - | |
376 | * and hope that we picked the right one... | |
377 | */ | |
e9348cdd | 378 | |
9b9c5aae CL |
379 | spin_lock_irqsave(&queue->lock, flags); |
380 | skb_queue_walk(queue, skb) { | |
381 | struct ar9170_tx_control *txc = (void *) skb->data; | |
382 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
383 | u32 r; | |
384 | ||
385 | if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) { | |
e9348cdd | 386 | #ifdef AR9170_QUEUE_DEBUG |
9b9c5aae CL |
387 | printk(KERN_DEBUG "%s: skip frame => DA %pM != %pM\n", |
388 | wiphy_name(ar->hw->wiphy), mac, | |
389 | ieee80211_get_DA(hdr)); | |
390 | ar9170_print_txheader(ar, skb); | |
391 | #endif /* AR9170_QUEUE_DEBUG */ | |
392 | continue; | |
393 | } | |
394 | ||
395 | r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >> | |
396 | AR9170_TX_PHY_MCS_SHIFT; | |
397 | ||
398 | if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) { | |
399 | #ifdef AR9170_QUEUE_DEBUG | |
400 | printk(KERN_DEBUG "%s: skip frame => rate %d != %d\n", | |
401 | wiphy_name(ar->hw->wiphy), rate, r); | |
402 | ar9170_print_txheader(ar, skb); | |
403 | #endif /* AR9170_QUEUE_DEBUG */ | |
404 | continue; | |
405 | } | |
406 | ||
407 | __skb_unlink(skb, queue); | |
408 | spin_unlock_irqrestore(&queue->lock, flags); | |
409 | return skb; | |
e9348cdd | 410 | } |
9b9c5aae CL |
411 | |
412 | #ifdef AR9170_QUEUE_DEBUG | |
413 | printk(KERN_ERR "%s: ESS:[%pM] does not have any " | |
414 | "outstanding frames in queue.\n", | |
415 | wiphy_name(ar->hw->wiphy), mac); | |
416 | __ar9170_dump_txqueue(ar, queue); | |
e9348cdd | 417 | #endif /* AR9170_QUEUE_DEBUG */ |
9b9c5aae CL |
418 | spin_unlock_irqrestore(&queue->lock, flags); |
419 | ||
420 | return NULL; | |
e9348cdd CL |
421 | } |
422 | ||
423 | /* | |
9b9c5aae CL |
424 | * This worker tries to keeps an maintain tx_status queues. |
425 | * So we can guarantee that incoming tx_status reports are | |
426 | * actually for a pending frame. | |
e9348cdd CL |
427 | */ |
428 | ||
9b9c5aae | 429 | static void ar9170_tx_janitor(struct work_struct *work) |
e9348cdd CL |
430 | { |
431 | struct ar9170 *ar = container_of(work, struct ar9170, | |
9b9c5aae CL |
432 | tx_janitor.work); |
433 | struct sk_buff_head waste; | |
434 | unsigned int i; | |
435 | bool resched = false; | |
e9348cdd | 436 | |
4a48e2a4 CL |
437 | if (unlikely(!IS_STARTED(ar))) |
438 | return ; | |
439 | ||
9b9c5aae CL |
440 | skb_queue_head_init(&waste); |
441 | ||
442 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { | |
e9348cdd | 443 | #ifdef AR9170_QUEUE_DEBUG |
9b9c5aae CL |
444 | printk(KERN_DEBUG "%s: garbage collector scans queue:%d\n", |
445 | wiphy_name(ar->hw->wiphy), i); | |
446 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); | |
447 | ar9170_dump_txqueue(ar, &ar->tx_status[i]); | |
e9348cdd | 448 | #endif /* AR9170_QUEUE_DEBUG */ |
e9348cdd | 449 | |
9b9c5aae CL |
450 | ar9170_recycle_expired(ar, &ar->tx_status[i], &waste); |
451 | ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste); | |
452 | skb_queue_purge(&waste); | |
e9348cdd | 453 | |
9b9c5aae CL |
454 | if (!skb_queue_empty(&ar->tx_status[i]) || |
455 | !skb_queue_empty(&ar->tx_pending[i])) | |
456 | resched = true; | |
e9348cdd CL |
457 | } |
458 | ||
9b9c5aae CL |
459 | if (resched) |
460 | queue_delayed_work(ar->hw->workqueue, | |
461 | &ar->tx_janitor, | |
462 | msecs_to_jiffies(AR9170_JANITOR_DELAY)); | |
e9348cdd CL |
463 | } |
464 | ||
66d00813 | 465 | void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len) |
e9348cdd CL |
466 | { |
467 | struct ar9170_cmd_response *cmd = (void *) buf; | |
468 | ||
469 | if ((cmd->type & 0xc0) != 0xc0) { | |
470 | ar->callback_cmd(ar, len, buf); | |
471 | return; | |
472 | } | |
473 | ||
474 | /* hardware event handlers */ | |
475 | switch (cmd->type) { | |
476 | case 0xc1: { | |
477 | /* | |
478 | * TX status notification: | |
479 | * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1 | |
480 | * | |
481 | * XX always 81 | |
482 | * YY always 00 | |
483 | * M1-M6 is the MAC address | |
484 | * R1-R4 is the transmit rate | |
485 | * S1-S2 is the transmit status | |
486 | */ | |
487 | ||
488 | struct sk_buff *skb; | |
9b9c5aae CL |
489 | u32 phy = le32_to_cpu(cmd->tx_status.rate); |
490 | u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >> | |
491 | AR9170_TX_PHY_QOS_SHIFT; | |
492 | #ifdef AR9170_QUEUE_DEBUG | |
493 | printk(KERN_DEBUG "%s: recv tx_status for %pM, p:%08x, q:%d\n", | |
494 | wiphy_name(ar->hw->wiphy), cmd->tx_status.dst, phy, q); | |
495 | #endif /* AR9170_QUEUE_DEBUG */ | |
e9348cdd | 496 | |
9b9c5aae CL |
497 | skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst, |
498 | &ar->tx_status[q], | |
499 | AR9170_TX_INVALID_RATE); | |
e9348cdd CL |
500 | if (unlikely(!skb)) |
501 | return ; | |
502 | ||
9b9c5aae | 503 | ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status)); |
e9348cdd CL |
504 | break; |
505 | } | |
506 | ||
507 | case 0xc0: | |
508 | /* | |
509 | * pre-TBTT event | |
510 | */ | |
511 | if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP) | |
512 | queue_work(ar->hw->workqueue, &ar->beacon_work); | |
513 | break; | |
514 | ||
515 | case 0xc2: | |
516 | /* | |
517 | * (IBSS) beacon send notification | |
518 | * bytes: 04 c2 XX YY B4 B3 B2 B1 | |
519 | * | |
520 | * XX always 80 | |
521 | * YY always 00 | |
522 | * B1-B4 "should" be the number of send out beacons. | |
523 | */ | |
524 | break; | |
525 | ||
526 | case 0xc3: | |
527 | /* End of Atim Window */ | |
528 | break; | |
529 | ||
530 | case 0xc4: | |
531 | case 0xc5: | |
532 | /* BlockACK events */ | |
533 | break; | |
534 | ||
535 | case 0xc6: | |
536 | /* Watchdog Interrupt */ | |
537 | break; | |
538 | ||
539 | case 0xc9: | |
540 | /* retransmission issue / SIFS/EIFS collision ?! */ | |
541 | break; | |
542 | ||
2543a0c4 JB |
543 | /* firmware debug */ |
544 | case 0xca: | |
545 | printk(KERN_DEBUG "ar9170 FW: %.*s\n", len - 4, (char *)buf + 4); | |
546 | break; | |
547 | case 0xcb: | |
548 | len -= 4; | |
549 | ||
550 | switch (len) { | |
551 | case 1: | |
552 | printk(KERN_DEBUG "ar9170 FW: u8: %#.2x\n", | |
553 | *((char *)buf + 4)); | |
554 | break; | |
555 | case 2: | |
556 | printk(KERN_DEBUG "ar9170 FW: u8: %#.4x\n", | |
557 | le16_to_cpup((__le16 *)((char *)buf + 4))); | |
558 | break; | |
559 | case 4: | |
560 | printk(KERN_DEBUG "ar9170 FW: u8: %#.8x\n", | |
561 | le32_to_cpup((__le32 *)((char *)buf + 4))); | |
562 | break; | |
563 | case 8: | |
564 | printk(KERN_DEBUG "ar9170 FW: u8: %#.16lx\n", | |
565 | (unsigned long)le64_to_cpup( | |
566 | (__le64 *)((char *)buf + 4))); | |
567 | break; | |
568 | } | |
569 | break; | |
570 | case 0xcc: | |
571 | print_hex_dump_bytes("ar9170 FW:", DUMP_PREFIX_NONE, | |
572 | (char *)buf + 4, len - 4); | |
573 | break; | |
574 | ||
e9348cdd CL |
575 | default: |
576 | printk(KERN_INFO "received unhandled event %x\n", cmd->type); | |
577 | print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len); | |
578 | break; | |
579 | } | |
580 | } | |
581 | ||
cca84799 | 582 | static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar) |
e9348cdd | 583 | { |
cca84799 CL |
584 | memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head)); |
585 | ar->rx_mpdu.has_plcp = false; | |
586 | } | |
e9348cdd | 587 | |
9b9c5aae | 588 | int ar9170_nag_limiter(struct ar9170 *ar) |
cca84799 CL |
589 | { |
590 | bool print_message; | |
591 | ||
592 | /* | |
593 | * we expect all sorts of errors in promiscuous mode. | |
594 | * don't bother with it, it's OK! | |
595 | */ | |
596 | if (ar->sniffer_enabled) | |
597 | return false; | |
598 | ||
599 | /* | |
600 | * only go for frequent errors! The hardware tends to | |
601 | * do some stupid thing once in a while under load, in | |
602 | * noisy environments or just for fun! | |
603 | */ | |
604 | if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit()) | |
605 | print_message = true; | |
606 | else | |
607 | print_message = false; | |
608 | ||
609 | /* reset threshold for "once in a while" */ | |
610 | ar->bad_hw_nagger = jiffies + HZ / 4; | |
611 | return print_message; | |
612 | } | |
613 | ||
614 | static int ar9170_rx_mac_status(struct ar9170 *ar, | |
615 | struct ar9170_rx_head *head, | |
616 | struct ar9170_rx_macstatus *mac, | |
617 | struct ieee80211_rx_status *status) | |
618 | { | |
619 | u8 error, decrypt; | |
e9348cdd | 620 | |
e9348cdd | 621 | BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12); |
cca84799 | 622 | BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4); |
e9348cdd | 623 | |
cca84799 CL |
624 | error = mac->error; |
625 | if (error & AR9170_RX_ERROR_MMIC) { | |
626 | status->flag |= RX_FLAG_MMIC_ERROR; | |
627 | error &= ~AR9170_RX_ERROR_MMIC; | |
628 | } | |
e9348cdd | 629 | |
cca84799 CL |
630 | if (error & AR9170_RX_ERROR_PLCP) { |
631 | status->flag |= RX_FLAG_FAILED_PLCP_CRC; | |
632 | error &= ~AR9170_RX_ERROR_PLCP; | |
e9348cdd | 633 | |
cca84799 CL |
634 | if (!(ar->filter_state & FIF_PLCPFAIL)) |
635 | return -EINVAL; | |
636 | } | |
e9348cdd | 637 | |
cca84799 CL |
638 | if (error & AR9170_RX_ERROR_FCS) { |
639 | status->flag |= RX_FLAG_FAILED_FCS_CRC; | |
640 | error &= ~AR9170_RX_ERROR_FCS; | |
e9348cdd | 641 | |
cca84799 CL |
642 | if (!(ar->filter_state & FIF_FCSFAIL)) |
643 | return -EINVAL; | |
644 | } | |
645 | ||
646 | decrypt = ar9170_get_decrypt_type(mac); | |
647 | if (!(decrypt & AR9170_RX_ENC_SOFTWARE) && | |
648 | decrypt != AR9170_ENC_ALG_NONE) | |
649 | status->flag |= RX_FLAG_DECRYPTED; | |
e9348cdd | 650 | |
cca84799 CL |
651 | /* ignore wrong RA errors */ |
652 | error &= ~AR9170_RX_ERROR_WRONG_RA; | |
e9348cdd | 653 | |
cca84799 CL |
654 | if (error & AR9170_RX_ERROR_DECRYPT) { |
655 | error &= ~AR9170_RX_ERROR_DECRYPT; | |
656 | /* | |
657 | * Rx decryption is done in place, | |
658 | * the original data is lost anyway. | |
659 | */ | |
660 | ||
661 | return -EINVAL; | |
662 | } | |
663 | ||
664 | /* drop any other error frames */ | |
665 | if (unlikely(error)) { | |
666 | /* TODO: update netdevice's RX dropped/errors statistics */ | |
667 | ||
668 | if (ar9170_nag_limiter(ar)) | |
669 | printk(KERN_DEBUG "%s: received frame with " | |
670 | "suspicious error code (%#x).\n", | |
671 | wiphy_name(ar->hw->wiphy), error); | |
672 | ||
673 | return -EINVAL; | |
674 | } | |
675 | ||
676 | status->band = ar->channel->band; | |
677 | status->freq = ar->channel->center_freq; | |
678 | ||
679 | switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) { | |
e9348cdd | 680 | case AR9170_RX_STATUS_MODULATION_CCK: |
cca84799 CL |
681 | if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE) |
682 | status->flag |= RX_FLAG_SHORTPRE; | |
e9348cdd CL |
683 | switch (head->plcp[0]) { |
684 | case 0x0a: | |
cca84799 | 685 | status->rate_idx = 0; |
e9348cdd CL |
686 | break; |
687 | case 0x14: | |
cca84799 | 688 | status->rate_idx = 1; |
e9348cdd CL |
689 | break; |
690 | case 0x37: | |
cca84799 | 691 | status->rate_idx = 2; |
e9348cdd CL |
692 | break; |
693 | case 0x6e: | |
cca84799 | 694 | status->rate_idx = 3; |
e9348cdd CL |
695 | break; |
696 | default: | |
cca84799 | 697 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
698 | printk(KERN_ERR "%s: invalid plcp cck rate " |
699 | "(%x).\n", wiphy_name(ar->hw->wiphy), | |
700 | head->plcp[0]); | |
cca84799 | 701 | return -EINVAL; |
e9348cdd CL |
702 | } |
703 | break; | |
cca84799 | 704 | |
e9348cdd | 705 | case AR9170_RX_STATUS_MODULATION_OFDM: |
cca84799 CL |
706 | switch (head->plcp[0] & 0xf) { |
707 | case 0xb: | |
708 | status->rate_idx = 0; | |
e9348cdd | 709 | break; |
cca84799 CL |
710 | case 0xf: |
711 | status->rate_idx = 1; | |
e9348cdd | 712 | break; |
cca84799 CL |
713 | case 0xa: |
714 | status->rate_idx = 2; | |
e9348cdd | 715 | break; |
cca84799 CL |
716 | case 0xe: |
717 | status->rate_idx = 3; | |
e9348cdd CL |
718 | break; |
719 | case 0x9: | |
cca84799 | 720 | status->rate_idx = 4; |
e9348cdd | 721 | break; |
cca84799 CL |
722 | case 0xd: |
723 | status->rate_idx = 5; | |
e9348cdd CL |
724 | break; |
725 | case 0x8: | |
cca84799 | 726 | status->rate_idx = 6; |
e9348cdd | 727 | break; |
cca84799 CL |
728 | case 0xc: |
729 | status->rate_idx = 7; | |
e9348cdd CL |
730 | break; |
731 | default: | |
cca84799 | 732 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
733 | printk(KERN_ERR "%s: invalid plcp ofdm rate " |
734 | "(%x).\n", wiphy_name(ar->hw->wiphy), | |
735 | head->plcp[0]); | |
cca84799 | 736 | return -EINVAL; |
e9348cdd | 737 | } |
cca84799 CL |
738 | if (status->band == IEEE80211_BAND_2GHZ) |
739 | status->rate_idx += 4; | |
e9348cdd | 740 | break; |
cca84799 | 741 | |
e9348cdd | 742 | case AR9170_RX_STATUS_MODULATION_HT: |
cca84799 CL |
743 | if (head->plcp[3] & 0x80) |
744 | status->flag |= RX_FLAG_40MHZ; | |
745 | if (head->plcp[6] & 0x80) | |
746 | status->flag |= RX_FLAG_SHORT_GI; | |
747 | ||
748 | status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f); | |
749 | status->flag |= RX_FLAG_HT; | |
750 | break; | |
751 | ||
e9348cdd CL |
752 | case AR9170_RX_STATUS_MODULATION_DUPOFDM: |
753 | /* XXX */ | |
cca84799 | 754 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
755 | printk(KERN_ERR "%s: invalid modulation\n", |
756 | wiphy_name(ar->hw->wiphy)); | |
cca84799 | 757 | return -EINVAL; |
e9348cdd CL |
758 | } |
759 | ||
cca84799 CL |
760 | return 0; |
761 | } | |
e9348cdd | 762 | |
cca84799 CL |
763 | static void ar9170_rx_phy_status(struct ar9170 *ar, |
764 | struct ar9170_rx_phystatus *phy, | |
765 | struct ieee80211_rx_status *status) | |
766 | { | |
767 | int i; | |
e9348cdd | 768 | |
cca84799 CL |
769 | BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20); |
770 | ||
771 | for (i = 0; i < 3; i++) | |
772 | if (phy->rssi[i] != 0x80) | |
773 | status->antenna |= BIT(i); | |
774 | ||
775 | /* post-process RSSI */ | |
776 | for (i = 0; i < 7; i++) | |
777 | if (phy->rssi[i] & 0x80) | |
778 | phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f; | |
779 | ||
780 | /* TODO: we could do something with phy_errors */ | |
781 | status->signal = ar->noise[0] + phy->rssi_combined; | |
782 | status->noise = ar->noise[0]; | |
783 | } | |
784 | ||
785 | static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len) | |
786 | { | |
787 | struct sk_buff *skb; | |
788 | int reserved = 0; | |
789 | struct ieee80211_hdr *hdr = (void *) buf; | |
790 | ||
791 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
792 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
793 | reserved += NET_IP_ALIGN; | |
794 | ||
795 | if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) | |
796 | reserved += NET_IP_ALIGN; | |
e9348cdd CL |
797 | } |
798 | ||
cca84799 CL |
799 | if (ieee80211_has_a4(hdr->frame_control)) |
800 | reserved += NET_IP_ALIGN; | |
801 | ||
802 | reserved = 32 + (reserved & NET_IP_ALIGN); | |
803 | ||
804 | skb = dev_alloc_skb(len + reserved); | |
805 | if (likely(skb)) { | |
806 | skb_reserve(skb, reserved); | |
807 | memcpy(skb_put(skb, len), buf, len); | |
e9348cdd CL |
808 | } |
809 | ||
cca84799 CL |
810 | return skb; |
811 | } | |
e9348cdd | 812 | |
cca84799 CL |
813 | /* |
814 | * If the frame alignment is right (or the kernel has | |
815 | * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there | |
816 | * is only a single MPDU in the USB frame, then we could | |
817 | * submit to mac80211 the SKB directly. However, since | |
818 | * there may be multiple packets in one SKB in stream | |
819 | * mode, and we need to observe the proper ordering, | |
820 | * this is non-trivial. | |
821 | */ | |
e9348cdd | 822 | |
cca84799 CL |
823 | static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) |
824 | { | |
825 | struct ar9170_rx_head *head; | |
826 | struct ar9170_rx_macstatus *mac; | |
827 | struct ar9170_rx_phystatus *phy = NULL; | |
828 | struct ieee80211_rx_status status; | |
829 | struct sk_buff *skb; | |
830 | int mpdu_len; | |
831 | ||
832 | if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac)))) | |
833 | return ; | |
834 | ||
835 | /* Received MPDU */ | |
836 | mpdu_len = len - sizeof(*mac); | |
837 | ||
838 | mac = (void *)(buf + mpdu_len); | |
839 | if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) { | |
840 | /* this frame is too damaged and can't be used - drop it */ | |
e9348cdd | 841 | |
e9348cdd CL |
842 | return ; |
843 | } | |
844 | ||
cca84799 CL |
845 | switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) { |
846 | case AR9170_RX_STATUS_MPDU_FIRST: | |
847 | /* first mpdu packet has the plcp header */ | |
848 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) { | |
849 | head = (void *) buf; | |
850 | memcpy(&ar->rx_mpdu.plcp, (void *) buf, | |
851 | sizeof(struct ar9170_rx_head)); | |
852 | ||
853 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
854 | buf += sizeof(struct ar9170_rx_head); | |
855 | ar->rx_mpdu.has_plcp = true; | |
856 | } else { | |
857 | if (ar9170_nag_limiter(ar)) | |
858 | printk(KERN_ERR "%s: plcp info is clipped.\n", | |
859 | wiphy_name(ar->hw->wiphy)); | |
860 | return ; | |
861 | } | |
862 | break; | |
863 | ||
864 | case AR9170_RX_STATUS_MPDU_LAST: | |
865 | /* last mpdu has a extra tail with phy status information */ | |
866 | ||
867 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) { | |
868 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
869 | phy = (void *)(buf + mpdu_len); | |
870 | } else { | |
871 | if (ar9170_nag_limiter(ar)) | |
872 | printk(KERN_ERR "%s: frame tail is clipped.\n", | |
873 | wiphy_name(ar->hw->wiphy)); | |
874 | return ; | |
875 | } | |
876 | ||
877 | case AR9170_RX_STATUS_MPDU_MIDDLE: | |
878 | /* middle mpdus are just data */ | |
879 | if (unlikely(!ar->rx_mpdu.has_plcp)) { | |
880 | if (!ar9170_nag_limiter(ar)) | |
881 | return ; | |
882 | ||
883 | printk(KERN_ERR "%s: rx stream did not start " | |
884 | "with a first_mpdu frame tag.\n", | |
885 | wiphy_name(ar->hw->wiphy)); | |
886 | ||
887 | return ; | |
888 | } | |
889 | ||
890 | head = &ar->rx_mpdu.plcp; | |
891 | break; | |
892 | ||
893 | case AR9170_RX_STATUS_MPDU_SINGLE: | |
894 | /* single mpdu - has plcp (head) and phy status (tail) */ | |
895 | head = (void *) buf; | |
896 | ||
897 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
898 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
899 | ||
900 | buf += sizeof(struct ar9170_rx_head); | |
901 | phy = (void *)(buf + mpdu_len); | |
902 | break; | |
903 | ||
904 | default: | |
905 | BUG_ON(1); | |
906 | break; | |
e9348cdd CL |
907 | } |
908 | ||
cca84799 CL |
909 | if (unlikely(mpdu_len < FCS_LEN)) |
910 | return ; | |
e9348cdd | 911 | |
cca84799 CL |
912 | memset(&status, 0, sizeof(status)); |
913 | if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status))) | |
914 | return ; | |
e9348cdd | 915 | |
cca84799 CL |
916 | if (phy) |
917 | ar9170_rx_phy_status(ar, phy, &status); | |
e9348cdd | 918 | |
cca84799 | 919 | skb = ar9170_rx_copy_data(buf, mpdu_len); |
f1d58c25 JB |
920 | if (likely(skb)) { |
921 | memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); | |
922 | ieee80211_rx_irqsafe(ar->hw, skb); | |
923 | } | |
e9348cdd CL |
924 | } |
925 | ||
e9348cdd CL |
926 | void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb) |
927 | { | |
cca84799 | 928 | unsigned int i, tlen, resplen, wlen = 0, clen = 0; |
e9348cdd CL |
929 | u8 *tbuf, *respbuf; |
930 | ||
931 | tbuf = skb->data; | |
932 | tlen = skb->len; | |
933 | ||
934 | while (tlen >= 4) { | |
cca84799 CL |
935 | clen = tbuf[1] << 8 | tbuf[0]; |
936 | wlen = ALIGN(clen, 4); | |
e9348cdd | 937 | |
cca84799 | 938 | /* check if this is stream has a valid tag.*/ |
e9348cdd | 939 | if (tbuf[2] != 0 || tbuf[3] != 0x4e) { |
cca84799 CL |
940 | /* |
941 | * TODO: handle the highly unlikely event that the | |
942 | * corrupted stream has the TAG at the right position. | |
943 | */ | |
944 | ||
945 | /* check if the frame can be repaired. */ | |
946 | if (!ar->rx_failover_missing) { | |
947 | /* this is no "short read". */ | |
948 | if (ar9170_nag_limiter(ar)) { | |
949 | printk(KERN_ERR "%s: missing tag!\n", | |
950 | wiphy_name(ar->hw->wiphy)); | |
951 | goto err_telluser; | |
952 | } else | |
953 | goto err_silent; | |
954 | } | |
955 | ||
956 | if (ar->rx_failover_missing > tlen) { | |
957 | if (ar9170_nag_limiter(ar)) { | |
958 | printk(KERN_ERR "%s: possible multi " | |
959 | "stream corruption!\n", | |
960 | wiphy_name(ar->hw->wiphy)); | |
961 | goto err_telluser; | |
962 | } else | |
963 | goto err_silent; | |
964 | } | |
965 | ||
966 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
967 | ar->rx_failover_missing -= tlen; | |
968 | ||
969 | if (ar->rx_failover_missing <= 0) { | |
970 | /* | |
971 | * nested ar9170_rx call! | |
972 | * termination is guranteed, even when the | |
973 | * combined frame also have a element with | |
974 | * a bad tag. | |
975 | */ | |
976 | ||
977 | ar->rx_failover_missing = 0; | |
978 | ar9170_rx(ar, ar->rx_failover); | |
979 | ||
980 | skb_reset_tail_pointer(ar->rx_failover); | |
981 | skb_trim(ar->rx_failover, 0); | |
982 | } | |
983 | ||
e9348cdd CL |
984 | return ; |
985 | } | |
cca84799 CL |
986 | |
987 | /* check if stream is clipped */ | |
e9348cdd | 988 | if (wlen > tlen - 4) { |
cca84799 CL |
989 | if (ar->rx_failover_missing) { |
990 | /* TODO: handle double stream corruption. */ | |
991 | if (ar9170_nag_limiter(ar)) { | |
992 | printk(KERN_ERR "%s: double rx stream " | |
993 | "corruption!\n", | |
994 | wiphy_name(ar->hw->wiphy)); | |
995 | goto err_telluser; | |
996 | } else | |
997 | goto err_silent; | |
998 | } | |
999 | ||
1000 | /* | |
1001 | * save incomplete data set. | |
1002 | * the firmware will resend the missing bits when | |
1003 | * the rx - descriptor comes round again. | |
1004 | */ | |
1005 | ||
1006 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
1007 | ar->rx_failover_missing = clen - tlen; | |
e9348cdd CL |
1008 | return ; |
1009 | } | |
1010 | resplen = clen; | |
1011 | respbuf = tbuf + 4; | |
1012 | tbuf += wlen + 4; | |
1013 | tlen -= wlen + 4; | |
1014 | ||
1015 | i = 0; | |
1016 | ||
1017 | /* weird thing, but this is the same in the original driver */ | |
1018 | while (resplen > 2 && i < 12 && | |
1019 | respbuf[0] == 0xff && respbuf[1] == 0xff) { | |
1020 | i += 2; | |
1021 | resplen -= 2; | |
1022 | respbuf += 2; | |
1023 | } | |
1024 | ||
1025 | if (resplen < 4) | |
1026 | continue; | |
1027 | ||
1028 | /* found the 6 * 0xffff marker? */ | |
1029 | if (i == 12) | |
1030 | ar9170_handle_command_response(ar, respbuf, resplen); | |
1031 | else | |
cca84799 | 1032 | ar9170_handle_mpdu(ar, respbuf, clen); |
e9348cdd CL |
1033 | } |
1034 | ||
cca84799 CL |
1035 | if (tlen) { |
1036 | if (net_ratelimit()) | |
1037 | printk(KERN_ERR "%s: %d bytes of unprocessed " | |
1038 | "data left in rx stream!\n", | |
1039 | wiphy_name(ar->hw->wiphy), tlen); | |
1040 | ||
1041 | goto err_telluser; | |
1042 | } | |
1043 | ||
1044 | return ; | |
1045 | ||
1046 | err_telluser: | |
1047 | printk(KERN_ERR "%s: damaged RX stream data [want:%d, " | |
1048 | "data:%d, rx:%d, pending:%d ]\n", | |
1049 | wiphy_name(ar->hw->wiphy), clen, wlen, tlen, | |
1050 | ar->rx_failover_missing); | |
1051 | ||
1052 | if (ar->rx_failover_missing) | |
1053 | print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET, | |
1054 | ar->rx_failover->data, | |
1055 | ar->rx_failover->len); | |
1056 | ||
1057 | print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET, | |
1058 | skb->data, skb->len); | |
1059 | ||
1060 | printk(KERN_ERR "%s: please check your hardware and cables, if " | |
1061 | "you see this message frequently.\n", | |
1062 | wiphy_name(ar->hw->wiphy)); | |
1063 | ||
1064 | err_silent: | |
1065 | if (ar->rx_failover_missing) { | |
1066 | skb_reset_tail_pointer(ar->rx_failover); | |
1067 | skb_trim(ar->rx_failover, 0); | |
1068 | ar->rx_failover_missing = 0; | |
1069 | } | |
e9348cdd | 1070 | } |
e9348cdd CL |
1071 | |
1072 | #define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \ | |
1073 | do { \ | |
1074 | queue.aifs = ai_fs; \ | |
1075 | queue.cw_min = cwmin; \ | |
1076 | queue.cw_max = cwmax; \ | |
1077 | queue.txop = _txop; \ | |
1078 | } while (0) | |
1079 | ||
1080 | static int ar9170_op_start(struct ieee80211_hw *hw) | |
1081 | { | |
1082 | struct ar9170 *ar = hw->priv; | |
1083 | int err, i; | |
1084 | ||
1085 | mutex_lock(&ar->mutex); | |
1086 | ||
864cc02e CL |
1087 | ar->filter_changed = 0; |
1088 | ||
e9348cdd CL |
1089 | /* reinitialize queues statistics */ |
1090 | memset(&ar->tx_stats, 0, sizeof(ar->tx_stats)); | |
9b9c5aae CL |
1091 | for (i = 0; i < __AR9170_NUM_TXQ; i++) |
1092 | ar->tx_stats[i].limit = AR9170_TXQ_DEPTH; | |
e9348cdd CL |
1093 | |
1094 | /* reset QoS defaults */ | |
1095 | AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/ | |
1096 | AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */ | |
1097 | AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */ | |
1098 | AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */ | |
1099 | AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */ | |
1100 | ||
cca84799 CL |
1101 | ar->bad_hw_nagger = jiffies; |
1102 | ||
e9348cdd CL |
1103 | err = ar->open(ar); |
1104 | if (err) | |
1105 | goto out; | |
1106 | ||
1107 | err = ar9170_init_mac(ar); | |
1108 | if (err) | |
1109 | goto out; | |
1110 | ||
1111 | err = ar9170_set_qos(ar); | |
1112 | if (err) | |
1113 | goto out; | |
1114 | ||
1115 | err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ); | |
1116 | if (err) | |
1117 | goto out; | |
1118 | ||
1119 | err = ar9170_init_rf(ar); | |
1120 | if (err) | |
1121 | goto out; | |
1122 | ||
1123 | /* start DMA */ | |
1124 | err = ar9170_write_reg(ar, 0x1c3d30, 0x100); | |
1125 | if (err) | |
1126 | goto out; | |
1127 | ||
1128 | ar->state = AR9170_STARTED; | |
1129 | ||
1130 | out: | |
1131 | mutex_unlock(&ar->mutex); | |
1132 | return err; | |
1133 | } | |
1134 | ||
1135 | static void ar9170_op_stop(struct ieee80211_hw *hw) | |
1136 | { | |
1137 | struct ar9170 *ar = hw->priv; | |
9b9c5aae | 1138 | unsigned int i; |
e9348cdd CL |
1139 | |
1140 | if (IS_STARTED(ar)) | |
1141 | ar->state = AR9170_IDLE; | |
1142 | ||
32c1628f | 1143 | flush_workqueue(ar->hw->workqueue); |
e9348cdd | 1144 | |
9b9c5aae | 1145 | cancel_delayed_work_sync(&ar->tx_janitor); |
e9348cdd CL |
1146 | cancel_work_sync(&ar->filter_config_work); |
1147 | cancel_work_sync(&ar->beacon_work); | |
b55d6bcf | 1148 | mutex_lock(&ar->mutex); |
e9348cdd CL |
1149 | |
1150 | if (IS_ACCEPTING_CMD(ar)) { | |
1151 | ar9170_set_leds_state(ar, 0); | |
1152 | ||
1153 | /* stop DMA */ | |
1154 | ar9170_write_reg(ar, 0x1c3d30, 0); | |
1155 | ar->stop(ar); | |
1156 | } | |
1157 | ||
9b9c5aae CL |
1158 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { |
1159 | skb_queue_purge(&ar->tx_pending[i]); | |
1160 | skb_queue_purge(&ar->tx_status[i]); | |
1161 | } | |
e9348cdd CL |
1162 | mutex_unlock(&ar->mutex); |
1163 | } | |
1164 | ||
9b9c5aae | 1165 | static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb) |
e9348cdd | 1166 | { |
e9348cdd CL |
1167 | struct ieee80211_hdr *hdr; |
1168 | struct ar9170_tx_control *txc; | |
1169 | struct ieee80211_tx_info *info; | |
e9348cdd | 1170 | struct ieee80211_tx_rate *txrate; |
9b9c5aae | 1171 | struct ar9170_tx_info *arinfo; |
e9348cdd | 1172 | unsigned int queue = skb_get_queue_mapping(skb); |
e9348cdd CL |
1173 | u16 keytype = 0; |
1174 | u16 len, icv = 0; | |
e9348cdd | 1175 | |
9b9c5aae | 1176 | BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data)); |
e9348cdd CL |
1177 | |
1178 | hdr = (void *)skb->data; | |
1179 | info = IEEE80211_SKB_CB(skb); | |
1180 | len = skb->len; | |
1181 | ||
e9348cdd CL |
1182 | txc = (void *)skb_push(skb, sizeof(*txc)); |
1183 | ||
e9348cdd CL |
1184 | if (info->control.hw_key) { |
1185 | icv = info->control.hw_key->icv_len; | |
1186 | ||
1187 | switch (info->control.hw_key->alg) { | |
1188 | case ALG_WEP: | |
1189 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1190 | break; | |
1191 | case ALG_TKIP: | |
1192 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1193 | break; | |
1194 | case ALG_CCMP: | |
1195 | keytype = AR9170_TX_MAC_ENCR_AES; | |
1196 | break; | |
1197 | default: | |
1198 | WARN_ON(1); | |
9b9c5aae | 1199 | goto err_out; |
e9348cdd CL |
1200 | } |
1201 | } | |
1202 | ||
1203 | /* Length */ | |
1204 | txc->length = cpu_to_le16(len + icv + 4); | |
1205 | ||
1206 | txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION | | |
1207 | AR9170_TX_MAC_BACKOFF); | |
1208 | txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] << | |
1209 | AR9170_TX_MAC_QOS_SHIFT); | |
1210 | txc->mac_control |= cpu_to_le16(keytype); | |
1211 | txc->phy_control = cpu_to_le32(0); | |
1212 | ||
1213 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1214 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK); | |
1215 | ||
e9348cdd | 1216 | txrate = &info->control.rates[0]; |
e9348cdd CL |
1217 | if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
1218 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS); | |
1219 | else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS) | |
1220 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS); | |
1221 | ||
9b9c5aae CL |
1222 | arinfo = (void *)info->rate_driver_data; |
1223 | arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT); | |
1224 | ||
1225 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && | |
1226 | (is_valid_ether_addr(ieee80211_get_DA(hdr)))) { | |
1227 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { | |
1228 | if (unlikely(!info->control.sta)) | |
1229 | goto err_out; | |
1230 | ||
1231 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR); | |
1232 | arinfo->flags = AR9170_TX_FLAG_BLOCK_ACK; | |
1233 | goto out; | |
1234 | } | |
1235 | ||
1236 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE); | |
1237 | /* | |
1238 | * WARNING: | |
1239 | * Putting the QoS queue bits into an unexplored territory is | |
1240 | * certainly not elegant. | |
1241 | * | |
1242 | * In my defense: This idea provides a reasonable way to | |
1243 | * smuggle valuable information to the tx_status callback. | |
1244 | * Also, the idea behind this bit-abuse came straight from | |
1245 | * the original driver code. | |
1246 | */ | |
1247 | ||
1248 | txc->phy_control |= | |
1249 | cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT); | |
1250 | arinfo->flags = AR9170_TX_FLAG_WAIT_FOR_ACK; | |
1251 | } else { | |
1252 | arinfo->flags = AR9170_TX_FLAG_NO_ACK; | |
1253 | } | |
1254 | ||
1255 | out: | |
1256 | return 0; | |
1257 | ||
1258 | err_out: | |
1259 | skb_pull(skb, sizeof(*txc)); | |
1260 | return -EINVAL; | |
1261 | } | |
1262 | ||
1263 | static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb) | |
1264 | { | |
1265 | struct ar9170_tx_control *txc; | |
1266 | struct ieee80211_tx_info *info; | |
1267 | struct ieee80211_rate *rate = NULL; | |
1268 | struct ieee80211_tx_rate *txrate; | |
1269 | u32 power, chains; | |
1270 | ||
1271 | txc = (void *) skb->data; | |
1272 | info = IEEE80211_SKB_CB(skb); | |
1273 | txrate = &info->control.rates[0]; | |
1274 | ||
e9348cdd CL |
1275 | if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD) |
1276 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD); | |
1277 | ||
1278 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) | |
1279 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE); | |
1280 | ||
1281 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
1282 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ); | |
1283 | /* this works because 40 MHz is 2 and dup is 3 */ | |
1284 | if (txrate->flags & IEEE80211_TX_RC_DUP_DATA) | |
1285 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP); | |
1286 | ||
1287 | if (txrate->flags & IEEE80211_TX_RC_SHORT_GI) | |
1288 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI); | |
1289 | ||
1290 | if (txrate->flags & IEEE80211_TX_RC_MCS) { | |
1291 | u32 r = txrate->idx; | |
1292 | u8 *txpower; | |
1293 | ||
9b9c5aae CL |
1294 | /* heavy clip control */ |
1295 | txc->phy_control |= cpu_to_le32((r & 0x7) << 7); | |
1296 | ||
e9348cdd | 1297 | r <<= AR9170_TX_PHY_MCS_SHIFT; |
9b9c5aae CL |
1298 | BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK); |
1299 | ||
e9348cdd CL |
1300 | txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK); |
1301 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT); | |
1302 | ||
1303 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) { | |
1304 | if (info->band == IEEE80211_BAND_5GHZ) | |
1305 | txpower = ar->power_5G_ht40; | |
1306 | else | |
1307 | txpower = ar->power_2G_ht40; | |
1308 | } else { | |
1309 | if (info->band == IEEE80211_BAND_5GHZ) | |
1310 | txpower = ar->power_5G_ht20; | |
1311 | else | |
1312 | txpower = ar->power_2G_ht20; | |
1313 | } | |
1314 | ||
1315 | power = txpower[(txrate->idx) & 7]; | |
1316 | } else { | |
1317 | u8 *txpower; | |
1318 | u32 mod; | |
1319 | u32 phyrate; | |
1320 | u8 idx = txrate->idx; | |
1321 | ||
1322 | if (info->band != IEEE80211_BAND_2GHZ) { | |
1323 | idx += 4; | |
1324 | txpower = ar->power_5G_leg; | |
1325 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1326 | } else { | |
1327 | if (idx < 4) { | |
1328 | txpower = ar->power_2G_cck; | |
1329 | mod = AR9170_TX_PHY_MOD_CCK; | |
1330 | } else { | |
1331 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1332 | txpower = ar->power_2G_ofdm; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | rate = &__ar9170_ratetable[idx]; | |
1337 | ||
1338 | phyrate = rate->hw_value & 0xF; | |
1339 | power = txpower[(rate->hw_value & 0x30) >> 4]; | |
1340 | phyrate <<= AR9170_TX_PHY_MCS_SHIFT; | |
1341 | ||
1342 | txc->phy_control |= cpu_to_le32(mod); | |
1343 | txc->phy_control |= cpu_to_le32(phyrate); | |
1344 | } | |
1345 | ||
1346 | power <<= AR9170_TX_PHY_TX_PWR_SHIFT; | |
1347 | power &= AR9170_TX_PHY_TX_PWR_MASK; | |
1348 | txc->phy_control |= cpu_to_le32(power); | |
1349 | ||
1350 | /* set TX chains */ | |
1351 | if (ar->eeprom.tx_mask == 1) { | |
1352 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1353 | } else { | |
1354 | chains = AR9170_TX_PHY_TXCHAIN_2; | |
1355 | ||
1356 | /* >= 36M legacy OFDM - use only one chain */ | |
1357 | if (rate && rate->bitrate >= 360) | |
1358 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1359 | } | |
1360 | txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT); | |
9b9c5aae | 1361 | } |
e9348cdd | 1362 | |
9b9c5aae CL |
1363 | static void ar9170_tx(struct ar9170 *ar) |
1364 | { | |
1365 | struct sk_buff *skb; | |
1366 | unsigned long flags; | |
1367 | struct ieee80211_tx_info *info; | |
1368 | struct ar9170_tx_info *arinfo; | |
1369 | unsigned int i, frames, frames_failed, remaining_space; | |
1370 | int err; | |
1371 | bool schedule_garbagecollector = false; | |
e9348cdd | 1372 | |
9b9c5aae | 1373 | BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data)); |
e9348cdd | 1374 | |
9b9c5aae CL |
1375 | if (unlikely(!IS_STARTED(ar))) |
1376 | return ; | |
1377 | ||
1378 | remaining_space = AR9170_TX_MAX_PENDING; | |
1379 | ||
1380 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { | |
1381 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1382 | if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) { | |
1383 | #ifdef AR9170_QUEUE_DEBUG | |
1384 | printk(KERN_DEBUG "%s: queue %d full\n", | |
1385 | wiphy_name(ar->hw->wiphy), i); | |
1386 | ||
1387 | __ar9170_dump_txstats(ar); | |
1388 | printk(KERN_DEBUG "stuck frames: ===> \n"); | |
1389 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); | |
1390 | ar9170_dump_txqueue(ar, &ar->tx_status[i]); | |
1391 | #endif /* AR9170_QUEUE_DEBUG */ | |
1392 | ieee80211_stop_queue(ar->hw, i); | |
1393 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1394 | continue; | |
1395 | } | |
e9348cdd | 1396 | |
9b9c5aae CL |
1397 | frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len, |
1398 | skb_queue_len(&ar->tx_pending[i])); | |
1399 | ||
1400 | if (remaining_space < frames) { | |
1401 | #ifdef AR9170_QUEUE_DEBUG | |
1402 | printk(KERN_DEBUG "%s: tx quota reached queue:%d, " | |
1403 | "remaining slots:%d, needed:%d\n", | |
1404 | wiphy_name(ar->hw->wiphy), i, remaining_space, | |
1405 | frames); | |
1406 | ||
1407 | ar9170_dump_txstats(ar); | |
1408 | #endif /* AR9170_QUEUE_DEBUG */ | |
1409 | frames = remaining_space; | |
1410 | } | |
1411 | ||
1412 | ar->tx_stats[i].len += frames; | |
1413 | ar->tx_stats[i].count += frames; | |
1414 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1415 | ||
1416 | if (!frames) | |
1417 | continue; | |
1418 | ||
1419 | frames_failed = 0; | |
1420 | while (frames) { | |
1421 | skb = skb_dequeue(&ar->tx_pending[i]); | |
1422 | if (unlikely(!skb)) { | |
1423 | frames_failed += frames; | |
1424 | frames = 0; | |
1425 | break; | |
1426 | } | |
1427 | ||
1428 | info = IEEE80211_SKB_CB(skb); | |
1429 | arinfo = (void *) info->rate_driver_data; | |
1430 | ||
1431 | /* TODO: cancel stuck frames */ | |
1432 | arinfo->timeout = jiffies + | |
1433 | msecs_to_jiffies(AR9170_TX_TIMEOUT); | |
1434 | ||
1435 | #ifdef AR9170_QUEUE_DEBUG | |
1436 | printk(KERN_DEBUG "%s: send frame q:%d =>\n", | |
1437 | wiphy_name(ar->hw->wiphy), i); | |
1438 | ar9170_print_txheader(ar, skb); | |
1439 | #endif /* AR9170_QUEUE_DEBUG */ | |
1440 | ||
1441 | err = ar->tx(ar, skb); | |
1442 | if (unlikely(err)) { | |
1443 | frames_failed++; | |
1444 | dev_kfree_skb_any(skb); | |
1445 | } else { | |
1446 | remaining_space--; | |
1447 | schedule_garbagecollector = true; | |
1448 | } | |
1449 | ||
1450 | frames--; | |
1451 | } | |
1452 | ||
1453 | #ifdef AR9170_QUEUE_DEBUG | |
1454 | printk(KERN_DEBUG "%s: ar9170_tx report for queue %d\n", | |
1455 | wiphy_name(ar->hw->wiphy), i); | |
1456 | ||
1457 | printk(KERN_DEBUG "%s: unprocessed pending frames left:\n", | |
1458 | wiphy_name(ar->hw->wiphy)); | |
1459 | ar9170_dump_txqueue(ar, &ar->tx_pending[i]); | |
1460 | #endif /* AR9170_QUEUE_DEBUG */ | |
1461 | ||
1462 | if (unlikely(frames_failed)) { | |
1463 | #ifdef AR9170_QUEUE_DEBUG | |
1464 | printk(KERN_DEBUG "%s: frames failed =>\n", | |
1465 | wiphy_name(ar->hw->wiphy), frames_failed); | |
1466 | #endif /* AR9170_QUEUE_DEBUG */ | |
1467 | ||
1468 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1469 | ar->tx_stats[i].len -= frames_failed; | |
1470 | ar->tx_stats[i].count -= frames_failed; | |
1471 | ieee80211_wake_queue(ar->hw, i); | |
1472 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
e9348cdd CL |
1473 | } |
1474 | } | |
1475 | ||
9b9c5aae CL |
1476 | if (schedule_garbagecollector) |
1477 | queue_delayed_work(ar->hw->workqueue, | |
1478 | &ar->tx_janitor, | |
1479 | msecs_to_jiffies(AR9170_JANITOR_DELAY)); | |
1480 | } | |
1481 | ||
1482 | int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) | |
1483 | { | |
1484 | struct ar9170 *ar = hw->priv; | |
1485 | struct ieee80211_tx_info *info; | |
1486 | ||
1487 | if (unlikely(!IS_STARTED(ar))) | |
1488 | goto err_free; | |
1489 | ||
1490 | if (unlikely(ar9170_tx_prepare(ar, skb))) | |
1491 | goto err_free; | |
1492 | ||
1493 | info = IEEE80211_SKB_CB(skb); | |
1494 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { | |
1495 | /* drop frame, we do not allow TX A-MPDU aggregation yet. */ | |
1496 | goto err_free; | |
1497 | } else { | |
1498 | unsigned int queue = skb_get_queue_mapping(skb); | |
1499 | ||
1500 | ar9170_tx_prepare_phy(ar, skb); | |
1501 | skb_queue_tail(&ar->tx_pending[queue], skb); | |
e9348cdd CL |
1502 | } |
1503 | ||
9b9c5aae | 1504 | ar9170_tx(ar); |
e9348cdd CL |
1505 | return NETDEV_TX_OK; |
1506 | ||
e9348cdd | 1507 | err_free: |
9b9c5aae | 1508 | dev_kfree_skb_any(skb); |
e9348cdd CL |
1509 | return NETDEV_TX_OK; |
1510 | } | |
1511 | ||
1512 | static int ar9170_op_add_interface(struct ieee80211_hw *hw, | |
1513 | struct ieee80211_if_init_conf *conf) | |
1514 | { | |
1515 | struct ar9170 *ar = hw->priv; | |
1516 | int err = 0; | |
1517 | ||
1518 | mutex_lock(&ar->mutex); | |
1519 | ||
1520 | if (ar->vif) { | |
1521 | err = -EBUSY; | |
1522 | goto unlock; | |
1523 | } | |
1524 | ||
1525 | ar->vif = conf->vif; | |
1526 | memcpy(ar->mac_addr, conf->mac_addr, ETH_ALEN); | |
1527 | ||
1528 | if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) { | |
1529 | ar->rx_software_decryption = true; | |
1530 | ar->disable_offload = true; | |
1531 | } | |
1532 | ||
1533 | ar->cur_filter = 0; | |
1534 | ar->want_filter = AR9170_MAC_REG_FTF_DEFAULTS; | |
1535 | err = ar9170_update_frame_filter(ar); | |
1536 | if (err) | |
1537 | goto unlock; | |
1538 | ||
1539 | err = ar9170_set_operating_mode(ar); | |
1540 | ||
1541 | unlock: | |
1542 | mutex_unlock(&ar->mutex); | |
1543 | return err; | |
1544 | } | |
1545 | ||
1546 | static void ar9170_op_remove_interface(struct ieee80211_hw *hw, | |
1547 | struct ieee80211_if_init_conf *conf) | |
1548 | { | |
1549 | struct ar9170 *ar = hw->priv; | |
1550 | ||
1551 | mutex_lock(&ar->mutex); | |
1552 | ar->vif = NULL; | |
1553 | ar->want_filter = 0; | |
1554 | ar9170_update_frame_filter(ar); | |
1555 | ar9170_set_beacon_timers(ar); | |
1556 | dev_kfree_skb(ar->beacon); | |
1557 | ar->beacon = NULL; | |
1558 | ar->sniffer_enabled = false; | |
1559 | ar->rx_software_decryption = false; | |
1560 | ar9170_set_operating_mode(ar); | |
1561 | mutex_unlock(&ar->mutex); | |
1562 | } | |
1563 | ||
1564 | static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed) | |
1565 | { | |
1566 | struct ar9170 *ar = hw->priv; | |
1567 | int err = 0; | |
1568 | ||
1569 | mutex_lock(&ar->mutex); | |
1570 | ||
e9348cdd CL |
1571 | if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) { |
1572 | /* TODO */ | |
1573 | err = 0; | |
1574 | } | |
1575 | ||
1576 | if (changed & IEEE80211_CONF_CHANGE_PS) { | |
1577 | /* TODO */ | |
1578 | err = 0; | |
1579 | } | |
1580 | ||
1581 | if (changed & IEEE80211_CONF_CHANGE_POWER) { | |
1582 | /* TODO */ | |
1583 | err = 0; | |
1584 | } | |
1585 | ||
1586 | if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) { | |
1587 | /* | |
1588 | * is it long_frame_max_tx_count or short_frame_max_tx_count? | |
1589 | */ | |
1590 | ||
1591 | err = ar9170_set_hwretry_limit(ar, | |
1592 | ar->hw->conf.long_frame_max_tx_count); | |
1593 | if (err) | |
1594 | goto out; | |
1595 | } | |
1596 | ||
57c4d7b4 | 1597 | if (changed & BSS_CHANGED_BEACON_INT) { |
e9348cdd CL |
1598 | err = ar9170_set_beacon_timers(ar); |
1599 | if (err) | |
1600 | goto out; | |
1601 | } | |
1602 | ||
1603 | if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { | |
29ceff5d CL |
1604 | |
1605 | /* adjust slot time for 5 GHz */ | |
1606 | err = ar9170_set_slot_time(ar); | |
1607 | if (err) | |
1608 | goto out; | |
1609 | ||
1610 | err = ar9170_set_dyn_sifs_ack(ar); | |
1611 | if (err) | |
1612 | goto out; | |
1613 | ||
e9348cdd | 1614 | err = ar9170_set_channel(ar, hw->conf.channel, |
9e52b062 JB |
1615 | AR9170_RFI_NONE, |
1616 | nl80211_to_ar9170(hw->conf.channel_type)); | |
e9348cdd CL |
1617 | if (err) |
1618 | goto out; | |
e9348cdd CL |
1619 | } |
1620 | ||
1621 | out: | |
1622 | mutex_unlock(&ar->mutex); | |
1623 | return err; | |
1624 | } | |
1625 | ||
e9348cdd CL |
1626 | static void ar9170_set_filters(struct work_struct *work) |
1627 | { | |
1628 | struct ar9170 *ar = container_of(work, struct ar9170, | |
1629 | filter_config_work); | |
1630 | int err; | |
1631 | ||
e9348cdd | 1632 | if (unlikely(!IS_STARTED(ar))) |
32c1628f | 1633 | return ; |
e9348cdd | 1634 | |
32c1628f | 1635 | mutex_lock(&ar->mutex); |
864cc02e CL |
1636 | if (test_and_clear_bit(AR9170_FILTER_CHANGED_MODE, |
1637 | &ar->filter_changed)) { | |
e9348cdd CL |
1638 | err = ar9170_set_operating_mode(ar); |
1639 | if (err) | |
1640 | goto unlock; | |
1641 | } | |
1642 | ||
864cc02e CL |
1643 | if (test_and_clear_bit(AR9170_FILTER_CHANGED_MULTICAST, |
1644 | &ar->filter_changed)) { | |
e9348cdd CL |
1645 | err = ar9170_update_multicast(ar); |
1646 | if (err) | |
1647 | goto unlock; | |
1648 | } | |
1649 | ||
864cc02e CL |
1650 | if (test_and_clear_bit(AR9170_FILTER_CHANGED_FRAMEFILTER, |
1651 | &ar->filter_changed)) { | |
e9348cdd | 1652 | err = ar9170_update_frame_filter(ar); |
864cc02e CL |
1653 | if (err) |
1654 | goto unlock; | |
1655 | } | |
e9348cdd CL |
1656 | |
1657 | unlock: | |
1658 | mutex_unlock(&ar->mutex); | |
1659 | } | |
1660 | ||
1661 | static void ar9170_op_configure_filter(struct ieee80211_hw *hw, | |
1662 | unsigned int changed_flags, | |
1663 | unsigned int *new_flags, | |
1664 | int mc_count, struct dev_mc_list *mclist) | |
1665 | { | |
1666 | struct ar9170 *ar = hw->priv; | |
1667 | ||
1668 | /* mask supported flags */ | |
1669 | *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC | | |
cca84799 CL |
1670 | FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL; |
1671 | ar->filter_state = *new_flags; | |
e9348cdd CL |
1672 | /* |
1673 | * We can support more by setting the sniffer bit and | |
1674 | * then checking the error flags, later. | |
1675 | */ | |
1676 | ||
1677 | if (changed_flags & FIF_ALLMULTI) { | |
1678 | if (*new_flags & FIF_ALLMULTI) { | |
1679 | ar->want_mc_hash = ~0ULL; | |
1680 | } else { | |
1681 | u64 mchash; | |
1682 | int i; | |
1683 | ||
1684 | /* always get broadcast frames */ | |
864cc02e | 1685 | mchash = 1ULL << (0xff >> 2); |
e9348cdd CL |
1686 | |
1687 | for (i = 0; i < mc_count; i++) { | |
1688 | if (WARN_ON(!mclist)) | |
1689 | break; | |
1690 | mchash |= 1ULL << (mclist->dmi_addr[5] >> 2); | |
1691 | mclist = mclist->next; | |
1692 | } | |
1693 | ar->want_mc_hash = mchash; | |
1694 | } | |
864cc02e | 1695 | set_bit(AR9170_FILTER_CHANGED_MULTICAST, &ar->filter_changed); |
e9348cdd CL |
1696 | } |
1697 | ||
1698 | if (changed_flags & FIF_CONTROL) { | |
1699 | u32 filter = AR9170_MAC_REG_FTF_PSPOLL | | |
1700 | AR9170_MAC_REG_FTF_RTS | | |
1701 | AR9170_MAC_REG_FTF_CTS | | |
1702 | AR9170_MAC_REG_FTF_ACK | | |
1703 | AR9170_MAC_REG_FTF_CFE | | |
1704 | AR9170_MAC_REG_FTF_CFE_ACK; | |
1705 | ||
1706 | if (*new_flags & FIF_CONTROL) | |
1707 | ar->want_filter = ar->cur_filter | filter; | |
1708 | else | |
1709 | ar->want_filter = ar->cur_filter & ~filter; | |
1710 | ||
864cc02e CL |
1711 | set_bit(AR9170_FILTER_CHANGED_FRAMEFILTER, |
1712 | &ar->filter_changed); | |
e9348cdd CL |
1713 | } |
1714 | ||
1715 | if (changed_flags & FIF_PROMISC_IN_BSS) { | |
1716 | ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0; | |
864cc02e CL |
1717 | set_bit(AR9170_FILTER_CHANGED_MODE, |
1718 | &ar->filter_changed); | |
e9348cdd CL |
1719 | } |
1720 | ||
1721 | if (likely(IS_STARTED(ar))) | |
1722 | queue_work(ar->hw->workqueue, &ar->filter_config_work); | |
1723 | } | |
1724 | ||
1725 | static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw, | |
1726 | struct ieee80211_vif *vif, | |
1727 | struct ieee80211_bss_conf *bss_conf, | |
1728 | u32 changed) | |
1729 | { | |
1730 | struct ar9170 *ar = hw->priv; | |
1731 | int err = 0; | |
1732 | ||
1733 | mutex_lock(&ar->mutex); | |
1734 | ||
2d0ddec5 JB |
1735 | if (changed & BSS_CHANGED_BSSID) { |
1736 | memcpy(ar->bssid, bss_conf->bssid, ETH_ALEN); | |
1737 | err = ar9170_set_operating_mode(ar); | |
29ceff5d CL |
1738 | if (err) |
1739 | goto out; | |
2d0ddec5 JB |
1740 | } |
1741 | ||
1742 | if (changed & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED)) { | |
1743 | err = ar9170_update_beacon(ar); | |
29ceff5d CL |
1744 | if (err) |
1745 | goto out; | |
2d0ddec5 | 1746 | |
29ceff5d CL |
1747 | err = ar9170_set_beacon_timers(ar); |
1748 | if (err) | |
1749 | goto out; | |
1750 | } | |
e9348cdd CL |
1751 | |
1752 | if (changed & BSS_CHANGED_ASSOC) { | |
e9348cdd CL |
1753 | #ifndef CONFIG_AR9170_LEDS |
1754 | /* enable assoc LED. */ | |
1755 | err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0); | |
1756 | #endif /* CONFIG_AR9170_LEDS */ | |
1757 | } | |
1758 | ||
29ceff5d | 1759 | if (changed & BSS_CHANGED_BEACON_INT) { |
57c4d7b4 | 1760 | err = ar9170_set_beacon_timers(ar); |
29ceff5d CL |
1761 | if (err) |
1762 | goto out; | |
1763 | } | |
57c4d7b4 | 1764 | |
e9348cdd CL |
1765 | if (changed & BSS_CHANGED_HT) { |
1766 | /* TODO */ | |
1767 | err = 0; | |
1768 | } | |
1769 | ||
1770 | if (changed & BSS_CHANGED_ERP_SLOT) { | |
29ceff5d CL |
1771 | err = ar9170_set_slot_time(ar); |
1772 | if (err) | |
1773 | goto out; | |
e9348cdd CL |
1774 | } |
1775 | ||
1776 | if (changed & BSS_CHANGED_BASIC_RATES) { | |
29ceff5d CL |
1777 | err = ar9170_set_basic_rates(ar); |
1778 | if (err) | |
1779 | goto out; | |
e9348cdd CL |
1780 | } |
1781 | ||
29ceff5d | 1782 | out: |
e9348cdd CL |
1783 | mutex_unlock(&ar->mutex); |
1784 | } | |
1785 | ||
1786 | static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw) | |
1787 | { | |
1788 | struct ar9170 *ar = hw->priv; | |
1789 | int err; | |
1790 | u32 tsf_low; | |
1791 | u32 tsf_high; | |
1792 | u64 tsf; | |
1793 | ||
1794 | mutex_lock(&ar->mutex); | |
1795 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_L, &tsf_low); | |
1796 | if (!err) | |
1797 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_H, &tsf_high); | |
1798 | mutex_unlock(&ar->mutex); | |
1799 | ||
1800 | if (WARN_ON(err)) | |
1801 | return 0; | |
1802 | ||
1803 | tsf = tsf_high; | |
1804 | tsf = (tsf << 32) | tsf_low; | |
1805 | return tsf; | |
1806 | } | |
1807 | ||
1808 | static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, | |
1809 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, | |
1810 | struct ieee80211_key_conf *key) | |
1811 | { | |
1812 | struct ar9170 *ar = hw->priv; | |
1813 | int err = 0, i; | |
1814 | u8 ktype; | |
1815 | ||
1816 | if ((!ar->vif) || (ar->disable_offload)) | |
1817 | return -EOPNOTSUPP; | |
1818 | ||
1819 | switch (key->alg) { | |
1820 | case ALG_WEP: | |
e31a16d6 | 1821 | if (key->keylen == WLAN_KEY_LEN_WEP40) |
e9348cdd CL |
1822 | ktype = AR9170_ENC_ALG_WEP64; |
1823 | else | |
1824 | ktype = AR9170_ENC_ALG_WEP128; | |
1825 | break; | |
1826 | case ALG_TKIP: | |
1827 | ktype = AR9170_ENC_ALG_TKIP; | |
1828 | break; | |
1829 | case ALG_CCMP: | |
1830 | ktype = AR9170_ENC_ALG_AESCCMP; | |
1831 | break; | |
1832 | default: | |
1833 | return -EOPNOTSUPP; | |
1834 | } | |
1835 | ||
1836 | mutex_lock(&ar->mutex); | |
1837 | if (cmd == SET_KEY) { | |
1838 | if (unlikely(!IS_STARTED(ar))) { | |
1839 | err = -EOPNOTSUPP; | |
1840 | goto out; | |
1841 | } | |
1842 | ||
1843 | /* group keys need all-zeroes address */ | |
1844 | if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1845 | sta = NULL; | |
1846 | ||
1847 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) { | |
1848 | for (i = 0; i < 64; i++) | |
1849 | if (!(ar->usedkeys & BIT(i))) | |
1850 | break; | |
1851 | if (i == 64) { | |
1852 | ar->rx_software_decryption = true; | |
1853 | ar9170_set_operating_mode(ar); | |
1854 | err = -ENOSPC; | |
1855 | goto out; | |
1856 | } | |
1857 | } else { | |
1858 | i = 64 + key->keyidx; | |
1859 | } | |
1860 | ||
1861 | key->hw_key_idx = i; | |
1862 | ||
1863 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0, | |
1864 | key->key, min_t(u8, 16, key->keylen)); | |
1865 | if (err) | |
1866 | goto out; | |
1867 | ||
1868 | if (key->alg == ALG_TKIP) { | |
1869 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, | |
1870 | ktype, 1, key->key + 16, 16); | |
1871 | if (err) | |
1872 | goto out; | |
1873 | ||
1874 | /* | |
1875 | * hardware is not capable generating the MMIC | |
1876 | * for fragmented frames! | |
1877 | */ | |
1878 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
1879 | } | |
1880 | ||
1881 | if (i < 64) | |
1882 | ar->usedkeys |= BIT(i); | |
1883 | ||
1884 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
1885 | } else { | |
1886 | if (unlikely(!IS_STARTED(ar))) { | |
1887 | /* The device is gone... together with the key ;-) */ | |
1888 | err = 0; | |
1889 | goto out; | |
1890 | } | |
1891 | ||
1892 | err = ar9170_disable_key(ar, key->hw_key_idx); | |
1893 | if (err) | |
1894 | goto out; | |
1895 | ||
1896 | if (key->hw_key_idx < 64) { | |
1897 | ar->usedkeys &= ~BIT(key->hw_key_idx); | |
1898 | } else { | |
1899 | err = ar9170_upload_key(ar, key->hw_key_idx, NULL, | |
1900 | AR9170_ENC_ALG_NONE, 0, | |
1901 | NULL, 0); | |
1902 | if (err) | |
1903 | goto out; | |
1904 | ||
1905 | if (key->alg == ALG_TKIP) { | |
1906 | err = ar9170_upload_key(ar, key->hw_key_idx, | |
1907 | NULL, | |
1908 | AR9170_ENC_ALG_NONE, 1, | |
1909 | NULL, 0); | |
1910 | if (err) | |
1911 | goto out; | |
1912 | } | |
1913 | ||
1914 | } | |
1915 | } | |
1916 | ||
1917 | ar9170_regwrite_begin(ar); | |
1918 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys); | |
1919 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32); | |
1920 | ar9170_regwrite_finish(); | |
1921 | err = ar9170_regwrite_result(); | |
1922 | ||
1923 | out: | |
1924 | mutex_unlock(&ar->mutex); | |
1925 | ||
1926 | return err; | |
1927 | } | |
1928 | ||
1929 | static void ar9170_sta_notify(struct ieee80211_hw *hw, | |
1930 | struct ieee80211_vif *vif, | |
1931 | enum sta_notify_cmd cmd, | |
1932 | struct ieee80211_sta *sta) | |
1933 | { | |
e9348cdd CL |
1934 | } |
1935 | ||
1936 | static int ar9170_get_stats(struct ieee80211_hw *hw, | |
1937 | struct ieee80211_low_level_stats *stats) | |
1938 | { | |
1939 | struct ar9170 *ar = hw->priv; | |
1940 | u32 val; | |
1941 | int err; | |
1942 | ||
1943 | mutex_lock(&ar->mutex); | |
1944 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val); | |
1945 | ar->stats.dot11ACKFailureCount += val; | |
1946 | ||
1947 | memcpy(stats, &ar->stats, sizeof(*stats)); | |
1948 | mutex_unlock(&ar->mutex); | |
1949 | ||
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | static int ar9170_get_tx_stats(struct ieee80211_hw *hw, | |
1954 | struct ieee80211_tx_queue_stats *tx_stats) | |
1955 | { | |
1956 | struct ar9170 *ar = hw->priv; | |
1957 | ||
1958 | spin_lock_bh(&ar->tx_stats_lock); | |
1959 | memcpy(tx_stats, ar->tx_stats, sizeof(tx_stats[0]) * hw->queues); | |
1960 | spin_unlock_bh(&ar->tx_stats_lock); | |
1961 | ||
1962 | return 0; | |
1963 | } | |
1964 | ||
1965 | static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue, | |
1966 | const struct ieee80211_tx_queue_params *param) | |
1967 | { | |
1968 | struct ar9170 *ar = hw->priv; | |
1969 | int ret; | |
1970 | ||
1971 | mutex_lock(&ar->mutex); | |
9b9c5aae | 1972 | if ((param) && !(queue > __AR9170_NUM_TXQ)) { |
e9348cdd CL |
1973 | memcpy(&ar->edcf[ar9170_qos_hwmap[queue]], |
1974 | param, sizeof(*param)); | |
1975 | ||
1976 | ret = ar9170_set_qos(ar); | |
1977 | } else | |
1978 | ret = -EINVAL; | |
1979 | ||
1980 | mutex_unlock(&ar->mutex); | |
1981 | return ret; | |
1982 | } | |
1983 | ||
9e52b062 JB |
1984 | static int ar9170_ampdu_action(struct ieee80211_hw *hw, |
1985 | enum ieee80211_ampdu_mlme_action action, | |
1986 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) | |
1987 | { | |
1988 | switch (action) { | |
1989 | case IEEE80211_AMPDU_RX_START: | |
1990 | case IEEE80211_AMPDU_RX_STOP: | |
1991 | /* | |
1992 | * Something goes wrong -- RX locks up | |
1993 | * after a while of receiving aggregated | |
1994 | * frames -- not enabling for now. | |
1995 | */ | |
1996 | return -EOPNOTSUPP; | |
1997 | default: | |
1998 | return -EOPNOTSUPP; | |
1999 | } | |
2000 | } | |
2001 | ||
e9348cdd CL |
2002 | static const struct ieee80211_ops ar9170_ops = { |
2003 | .start = ar9170_op_start, | |
2004 | .stop = ar9170_op_stop, | |
2005 | .tx = ar9170_op_tx, | |
2006 | .add_interface = ar9170_op_add_interface, | |
2007 | .remove_interface = ar9170_op_remove_interface, | |
2008 | .config = ar9170_op_config, | |
e9348cdd CL |
2009 | .configure_filter = ar9170_op_configure_filter, |
2010 | .conf_tx = ar9170_conf_tx, | |
2011 | .bss_info_changed = ar9170_op_bss_info_changed, | |
2012 | .get_tsf = ar9170_op_get_tsf, | |
2013 | .set_key = ar9170_set_key, | |
2014 | .sta_notify = ar9170_sta_notify, | |
2015 | .get_stats = ar9170_get_stats, | |
2016 | .get_tx_stats = ar9170_get_tx_stats, | |
9e52b062 | 2017 | .ampdu_action = ar9170_ampdu_action, |
e9348cdd CL |
2018 | }; |
2019 | ||
2020 | void *ar9170_alloc(size_t priv_size) | |
2021 | { | |
2022 | struct ieee80211_hw *hw; | |
2023 | struct ar9170 *ar; | |
cca84799 | 2024 | struct sk_buff *skb; |
e9348cdd CL |
2025 | int i; |
2026 | ||
cca84799 CL |
2027 | /* |
2028 | * this buffer is used for rx stream reconstruction. | |
2029 | * Under heavy load this device (or the transport layer?) | |
2030 | * tends to split the streams into seperate rx descriptors. | |
2031 | */ | |
2032 | ||
2033 | skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL); | |
2034 | if (!skb) | |
2035 | goto err_nomem; | |
2036 | ||
e9348cdd CL |
2037 | hw = ieee80211_alloc_hw(priv_size, &ar9170_ops); |
2038 | if (!hw) | |
cca84799 | 2039 | goto err_nomem; |
e9348cdd CL |
2040 | |
2041 | ar = hw->priv; | |
2042 | ar->hw = hw; | |
cca84799 | 2043 | ar->rx_failover = skb; |
e9348cdd CL |
2044 | |
2045 | mutex_init(&ar->mutex); | |
2046 | spin_lock_init(&ar->cmdlock); | |
2047 | spin_lock_init(&ar->tx_stats_lock); | |
9b9c5aae CL |
2048 | for (i = 0; i < __AR9170_NUM_TXQ; i++) { |
2049 | skb_queue_head_init(&ar->tx_status[i]); | |
2050 | skb_queue_head_init(&ar->tx_pending[i]); | |
2051 | } | |
cca84799 | 2052 | ar9170_rx_reset_rx_mpdu(ar); |
e9348cdd CL |
2053 | INIT_WORK(&ar->filter_config_work, ar9170_set_filters); |
2054 | INIT_WORK(&ar->beacon_work, ar9170_new_beacon); | |
9b9c5aae | 2055 | INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor); |
e9348cdd CL |
2056 | |
2057 | /* all hw supports 2.4 GHz, so set channel to 1 by default */ | |
2058 | ar->channel = &ar9170_2ghz_chantable[0]; | |
2059 | ||
2060 | /* first part of wiphy init */ | |
2061 | ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | | |
2062 | BIT(NL80211_IFTYPE_WDS) | | |
2063 | BIT(NL80211_IFTYPE_ADHOC); | |
2064 | ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS | | |
2065 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | | |
2066 | IEEE80211_HW_SIGNAL_DBM | | |
2067 | IEEE80211_HW_NOISE_DBM; | |
2068 | ||
4a48e2a4 | 2069 | ar->hw->queues = __AR9170_NUM_TXQ; |
e9348cdd CL |
2070 | ar->hw->extra_tx_headroom = 8; |
2071 | ar->hw->sta_data_size = sizeof(struct ar9170_sta_info); | |
2072 | ||
2073 | ar->hw->max_rates = 1; | |
2074 | ar->hw->max_rate_tries = 3; | |
2075 | ||
2076 | for (i = 0; i < ARRAY_SIZE(ar->noise); i++) | |
2077 | ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ | |
2078 | ||
2079 | return ar; | |
cca84799 CL |
2080 | |
2081 | err_nomem: | |
2082 | kfree_skb(skb); | |
2083 | return ERR_PTR(-ENOMEM); | |
e9348cdd | 2084 | } |
e9348cdd CL |
2085 | |
2086 | static int ar9170_read_eeprom(struct ar9170 *ar) | |
2087 | { | |
2088 | #define RW 8 /* number of words to read at once */ | |
2089 | #define RB (sizeof(u32) * RW) | |
2090 | DECLARE_MAC_BUF(mbuf); | |
2091 | u8 *eeprom = (void *)&ar->eeprom; | |
2092 | u8 *addr = ar->eeprom.mac_address; | |
2093 | __le32 offsets[RW]; | |
2094 | int i, j, err, bands = 0; | |
2095 | ||
2096 | BUILD_BUG_ON(sizeof(ar->eeprom) & 3); | |
2097 | ||
2098 | BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4); | |
2099 | #ifndef __CHECKER__ | |
2100 | /* don't want to handle trailing remains */ | |
2101 | BUILD_BUG_ON(sizeof(ar->eeprom) % RB); | |
2102 | #endif | |
2103 | ||
2104 | for (i = 0; i < sizeof(ar->eeprom)/RB; i++) { | |
2105 | for (j = 0; j < RW; j++) | |
2106 | offsets[j] = cpu_to_le32(AR9170_EEPROM_START + | |
2107 | RB * i + 4 * j); | |
2108 | ||
2109 | err = ar->exec_cmd(ar, AR9170_CMD_RREG, | |
2110 | RB, (u8 *) &offsets, | |
2111 | RB, eeprom + RB * i); | |
2112 | if (err) | |
2113 | return err; | |
2114 | } | |
2115 | ||
2116 | #undef RW | |
2117 | #undef RB | |
2118 | ||
2119 | if (ar->eeprom.length == cpu_to_le16(0xFFFF)) | |
2120 | return -ENODATA; | |
2121 | ||
2122 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { | |
2123 | ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz; | |
2124 | bands++; | |
2125 | } | |
2126 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { | |
2127 | ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz; | |
2128 | bands++; | |
2129 | } | |
2130 | /* | |
2131 | * I measured this, a bandswitch takes roughly | |
2132 | * 135 ms and a frequency switch about 80. | |
2133 | * | |
2134 | * FIXME: measure these values again once EEPROM settings | |
2135 | * are used, that will influence them! | |
2136 | */ | |
2137 | if (bands == 2) | |
2138 | ar->hw->channel_change_time = 135 * 1000; | |
2139 | else | |
2140 | ar->hw->channel_change_time = 80 * 1000; | |
2141 | ||
1878f77e CL |
2142 | ar->regulatory.current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); |
2143 | ar->regulatory.current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]); | |
2144 | ||
e9348cdd CL |
2145 | /* second part of wiphy init */ |
2146 | SET_IEEE80211_PERM_ADDR(ar->hw, addr); | |
2147 | ||
2148 | return bands ? 0 : -EINVAL; | |
2149 | } | |
2150 | ||
1878f77e CL |
2151 | static int ar9170_reg_notifier(struct wiphy *wiphy, |
2152 | struct regulatory_request *request) | |
2153 | { | |
2154 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); | |
2155 | struct ar9170 *ar = hw->priv; | |
2156 | ||
2157 | return ath_reg_notifier_apply(wiphy, request, &ar->regulatory); | |
2158 | } | |
2159 | ||
e9348cdd CL |
2160 | int ar9170_register(struct ar9170 *ar, struct device *pdev) |
2161 | { | |
2162 | int err; | |
2163 | ||
2164 | /* try to read EEPROM, init MAC addr */ | |
2165 | err = ar9170_read_eeprom(ar); | |
2166 | if (err) | |
2167 | goto err_out; | |
2168 | ||
1878f77e CL |
2169 | err = ath_regd_init(&ar->regulatory, ar->hw->wiphy, |
2170 | ar9170_reg_notifier); | |
85efc86e LR |
2171 | if (err) |
2172 | goto err_out; | |
1878f77e | 2173 | |
e9348cdd CL |
2174 | err = ieee80211_register_hw(ar->hw); |
2175 | if (err) | |
2176 | goto err_out; | |
2177 | ||
1878f77e CL |
2178 | if (!ath_is_world_regd(&ar->regulatory)) |
2179 | regulatory_hint(ar->hw->wiphy, ar->regulatory.alpha2); | |
2180 | ||
e9348cdd CL |
2181 | err = ar9170_init_leds(ar); |
2182 | if (err) | |
2183 | goto err_unreg; | |
2184 | ||
2185 | #ifdef CONFIG_AR9170_LEDS | |
2186 | err = ar9170_register_leds(ar); | |
2187 | if (err) | |
2188 | goto err_unreg; | |
2189 | #endif /* CONFIG_AR9170_LEDS */ | |
2190 | ||
2191 | dev_info(pdev, "Atheros AR9170 is registered as '%s'\n", | |
2192 | wiphy_name(ar->hw->wiphy)); | |
2193 | ||
2194 | return err; | |
2195 | ||
2196 | err_unreg: | |
2197 | ieee80211_unregister_hw(ar->hw); | |
2198 | ||
2199 | err_out: | |
2200 | return err; | |
2201 | } | |
e9348cdd CL |
2202 | |
2203 | void ar9170_unregister(struct ar9170 *ar) | |
2204 | { | |
2205 | #ifdef CONFIG_AR9170_LEDS | |
2206 | ar9170_unregister_leds(ar); | |
2207 | #endif /* CONFIG_AR9170_LEDS */ | |
2208 | ||
cca84799 | 2209 | kfree_skb(ar->rx_failover); |
e9348cdd CL |
2210 | ieee80211_unregister_hw(ar->hw); |
2211 | mutex_destroy(&ar->mutex); | |
2212 | } |