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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 | \ | |
149 | IEEE80211_HT_CAP_SM_PS | \ | |
150 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \ | |
151 | IEEE80211_HT_CAP_SGI_40 | \ | |
152 | IEEE80211_HT_CAP_DSSSCCK40 | \ | |
153 | IEEE80211_HT_CAP_SM_PS, \ | |
154 | .ampdu_factor = 3, /* ?? */ \ | |
155 | .ampdu_density = 7, /* ?? */ \ | |
156 | .mcs = { \ | |
157 | .rx_mask = { 0xFF, 0xFF, 0, 0, 0, 0, 0, 0, 0, 0, }, \ | |
158 | }, \ | |
159 | } | |
160 | ||
e9348cdd CL |
161 | static struct ieee80211_supported_band ar9170_band_2GHz = { |
162 | .channels = ar9170_2ghz_chantable, | |
163 | .n_channels = ARRAY_SIZE(ar9170_2ghz_chantable), | |
164 | .bitrates = ar9170_g_ratetable, | |
165 | .n_bitrates = ar9170_g_ratetable_size, | |
9e52b062 JB |
166 | .ht_cap = AR9170_HT_CAP, |
167 | }; | |
168 | ||
169 | static struct ieee80211_supported_band ar9170_band_5GHz = { | |
170 | .channels = ar9170_5ghz_chantable, | |
171 | .n_channels = ARRAY_SIZE(ar9170_5ghz_chantable), | |
172 | .bitrates = ar9170_a_ratetable, | |
173 | .n_bitrates = ar9170_a_ratetable_size, | |
174 | .ht_cap = AR9170_HT_CAP, | |
e9348cdd CL |
175 | }; |
176 | ||
177 | #ifdef AR9170_QUEUE_DEBUG | |
178 | /* | |
179 | * In case some wants works with AR9170's crazy tx_status queueing techniques. | |
180 | * He might need this rather useful probing function. | |
181 | * | |
182 | * NOTE: caller must hold the queue's spinlock! | |
183 | */ | |
184 | ||
185 | static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb) | |
186 | { | |
187 | struct ar9170_tx_control *txc = (void *) skb->data; | |
188 | struct ieee80211_hdr *hdr = (void *)txc->frame_data; | |
189 | ||
190 | printk(KERN_DEBUG "%s: => FRAME [skb:%p, queue:%d, DA:[%pM] " | |
191 | "mac_control:%04x, phy_control:%08x]\n", | |
192 | wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb), | |
193 | ieee80211_get_DA(hdr), le16_to_cpu(txc->mac_control), | |
194 | le32_to_cpu(txc->phy_control)); | |
195 | } | |
196 | ||
197 | static void ar9170_dump_station_tx_status_queue(struct ar9170 *ar, | |
198 | struct sk_buff_head *queue) | |
199 | { | |
200 | struct sk_buff *skb; | |
201 | int i = 0; | |
202 | ||
203 | printk(KERN_DEBUG "---[ cut here ]---\n"); | |
204 | printk(KERN_DEBUG "%s: %d entries in tx_status queue.\n", | |
205 | wiphy_name(ar->hw->wiphy), skb_queue_len(queue)); | |
206 | ||
207 | skb_queue_walk(queue, skb) { | |
208 | struct ar9170_tx_control *txc = (void *) skb->data; | |
209 | struct ieee80211_hdr *hdr = (void *)txc->frame_data; | |
210 | ||
211 | printk(KERN_DEBUG "index:%d => \n", i); | |
212 | ar9170_print_txheader(ar, skb); | |
213 | } | |
214 | printk(KERN_DEBUG "---[ end ]---\n"); | |
215 | } | |
216 | #endif /* AR9170_QUEUE_DEBUG */ | |
217 | ||
e9348cdd CL |
218 | void ar9170_handle_tx_status(struct ar9170 *ar, struct sk_buff *skb, |
219 | bool valid_status, u16 tx_status) | |
220 | { | |
221 | struct ieee80211_tx_info *txinfo; | |
222 | unsigned int retries = 0, queue = skb_get_queue_mapping(skb); | |
223 | unsigned long flags; | |
224 | ||
225 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
226 | ar->tx_stats[queue].len--; | |
227 | if (ieee80211_queue_stopped(ar->hw, queue)) | |
228 | ieee80211_wake_queue(ar->hw, queue); | |
229 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
230 | ||
231 | txinfo = IEEE80211_SKB_CB(skb); | |
232 | ieee80211_tx_info_clear_status(txinfo); | |
233 | ||
234 | switch (tx_status) { | |
235 | case AR9170_TX_STATUS_RETRY: | |
236 | retries = 2; | |
237 | case AR9170_TX_STATUS_COMPLETE: | |
238 | txinfo->flags |= IEEE80211_TX_STAT_ACK; | |
239 | break; | |
240 | ||
241 | case AR9170_TX_STATUS_FAILED: | |
242 | retries = ar->hw->conf.long_frame_max_tx_count; | |
243 | break; | |
244 | ||
245 | default: | |
246 | printk(KERN_ERR "%s: invalid tx_status response (%x).\n", | |
247 | wiphy_name(ar->hw->wiphy), tx_status); | |
248 | break; | |
249 | } | |
250 | ||
251 | if (valid_status) | |
252 | txinfo->status.rates[0].count = retries + 1; | |
253 | ||
254 | skb_pull(skb, sizeof(struct ar9170_tx_control)); | |
255 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
256 | } | |
e9348cdd CL |
257 | |
258 | static struct sk_buff *ar9170_find_skb_in_queue(struct ar9170 *ar, | |
259 | const u8 *mac, | |
260 | const u32 queue, | |
261 | struct sk_buff_head *q) | |
262 | { | |
263 | unsigned long flags; | |
264 | struct sk_buff *skb; | |
265 | ||
266 | spin_lock_irqsave(&q->lock, flags); | |
267 | skb_queue_walk(q, skb) { | |
268 | struct ar9170_tx_control *txc = (void *) skb->data; | |
269 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
270 | u32 txc_queue = (le32_to_cpu(txc->phy_control) & | |
271 | AR9170_TX_PHY_QOS_MASK) >> | |
272 | AR9170_TX_PHY_QOS_SHIFT; | |
273 | ||
274 | if ((queue != txc_queue) || | |
275 | (compare_ether_addr(ieee80211_get_DA(hdr), mac))) | |
276 | continue; | |
277 | ||
278 | __skb_unlink(skb, q); | |
279 | spin_unlock_irqrestore(&q->lock, flags); | |
280 | return skb; | |
281 | } | |
282 | spin_unlock_irqrestore(&q->lock, flags); | |
283 | return NULL; | |
284 | } | |
285 | ||
e9348cdd CL |
286 | static struct sk_buff *ar9170_find_queued_skb(struct ar9170 *ar, const u8 *mac, |
287 | const u32 queue) | |
288 | { | |
289 | struct ieee80211_sta *sta; | |
290 | struct sk_buff *skb; | |
291 | ||
292 | /* | |
293 | * Unfortunately, the firmware does not tell to which (queued) frame | |
294 | * this transmission status report belongs to. | |
295 | * | |
296 | * So we have to make risky guesses - with the scarce information | |
297 | * the firmware provided (-> destination MAC, and phy_control) - | |
298 | * and hope that we picked the right one... | |
299 | */ | |
300 | rcu_read_lock(); | |
301 | sta = ieee80211_find_sta(ar->hw, mac); | |
302 | ||
303 | if (likely(sta)) { | |
304 | struct ar9170_sta_info *sta_priv = (void *) sta->drv_priv; | |
4a48e2a4 CL |
305 | skb = skb_dequeue(&sta_priv->tx_status[queue]); |
306 | rcu_read_unlock(); | |
307 | if (likely(skb)) | |
308 | return skb; | |
309 | } else | |
310 | rcu_read_unlock(); | |
e9348cdd | 311 | |
4a48e2a4 CL |
312 | /* scan the waste queue for candidates */ |
313 | skb = ar9170_find_skb_in_queue(ar, mac, queue, | |
314 | &ar->global_tx_status_waste); | |
315 | if (!skb) { | |
316 | /* so it still _must_ be in the global list. */ | |
e9348cdd | 317 | skb = ar9170_find_skb_in_queue(ar, mac, queue, |
4a48e2a4 | 318 | &ar->global_tx_status); |
e9348cdd | 319 | } |
e9348cdd CL |
320 | |
321 | #ifdef AR9170_QUEUE_DEBUG | |
322 | if (unlikely((!skb) && net_ratelimit())) { | |
323 | printk(KERN_ERR "%s: ESS:[%pM] does not have any " | |
324 | "outstanding frames in this queue (%d).\n", | |
325 | wiphy_name(ar->hw->wiphy), mac, queue); | |
326 | } | |
327 | #endif /* AR9170_QUEUE_DEBUG */ | |
e9348cdd CL |
328 | return skb; |
329 | } | |
330 | ||
331 | /* | |
332 | * This worker tries to keep the global tx_status queue empty. | |
333 | * So we can guarantee that incoming tx_status reports for | |
334 | * unregistered stations are always synced with the actual | |
335 | * frame - which we think - belongs to. | |
336 | */ | |
337 | ||
338 | static void ar9170_tx_status_janitor(struct work_struct *work) | |
339 | { | |
340 | struct ar9170 *ar = container_of(work, struct ar9170, | |
4a48e2a4 | 341 | tx_status_janitor.work); |
e9348cdd CL |
342 | struct sk_buff *skb; |
343 | ||
4a48e2a4 CL |
344 | if (unlikely(!IS_STARTED(ar))) |
345 | return ; | |
346 | ||
347 | mutex_lock(&ar->mutex); | |
e9348cdd CL |
348 | /* recycle the garbage back to mac80211... one by one. */ |
349 | while ((skb = skb_dequeue(&ar->global_tx_status_waste))) { | |
350 | #ifdef AR9170_QUEUE_DEBUG | |
351 | printk(KERN_DEBUG "%s: dispose queued frame =>\n", | |
352 | wiphy_name(ar->hw->wiphy)); | |
353 | ar9170_print_txheader(ar, skb); | |
354 | #endif /* AR9170_QUEUE_DEBUG */ | |
355 | ar9170_handle_tx_status(ar, skb, false, | |
356 | AR9170_TX_STATUS_FAILED); | |
357 | } | |
358 | ||
e9348cdd CL |
359 | while ((skb = skb_dequeue(&ar->global_tx_status))) { |
360 | #ifdef AR9170_QUEUE_DEBUG | |
361 | printk(KERN_DEBUG "%s: moving frame into waste queue =>\n", | |
362 | wiphy_name(ar->hw->wiphy)); | |
363 | ||
364 | ar9170_print_txheader(ar, skb); | |
365 | #endif /* AR9170_QUEUE_DEBUG */ | |
366 | skb_queue_tail(&ar->global_tx_status_waste, skb); | |
367 | } | |
368 | ||
369 | /* recall the janitor in 100ms - if there's garbage in the can. */ | |
370 | if (skb_queue_len(&ar->global_tx_status_waste) > 0) | |
371 | queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor, | |
372 | msecs_to_jiffies(100)); | |
4a48e2a4 CL |
373 | |
374 | mutex_unlock(&ar->mutex); | |
e9348cdd CL |
375 | } |
376 | ||
377 | static void ar9170_handle_command_response(struct ar9170 *ar, | |
378 | void *buf, u32 len) | |
379 | { | |
380 | struct ar9170_cmd_response *cmd = (void *) buf; | |
381 | ||
382 | if ((cmd->type & 0xc0) != 0xc0) { | |
383 | ar->callback_cmd(ar, len, buf); | |
384 | return; | |
385 | } | |
386 | ||
387 | /* hardware event handlers */ | |
388 | switch (cmd->type) { | |
389 | case 0xc1: { | |
390 | /* | |
391 | * TX status notification: | |
392 | * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1 | |
393 | * | |
394 | * XX always 81 | |
395 | * YY always 00 | |
396 | * M1-M6 is the MAC address | |
397 | * R1-R4 is the transmit rate | |
398 | * S1-S2 is the transmit status | |
399 | */ | |
400 | ||
401 | struct sk_buff *skb; | |
402 | u32 queue = (le32_to_cpu(cmd->tx_status.rate) & | |
403 | AR9170_TX_PHY_QOS_MASK) >> AR9170_TX_PHY_QOS_SHIFT; | |
404 | ||
405 | skb = ar9170_find_queued_skb(ar, cmd->tx_status.dst, queue); | |
406 | if (unlikely(!skb)) | |
407 | return ; | |
408 | ||
409 | ar9170_handle_tx_status(ar, skb, true, | |
410 | le16_to_cpu(cmd->tx_status.status)); | |
411 | break; | |
412 | } | |
413 | ||
414 | case 0xc0: | |
415 | /* | |
416 | * pre-TBTT event | |
417 | */ | |
418 | if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP) | |
419 | queue_work(ar->hw->workqueue, &ar->beacon_work); | |
420 | break; | |
421 | ||
422 | case 0xc2: | |
423 | /* | |
424 | * (IBSS) beacon send notification | |
425 | * bytes: 04 c2 XX YY B4 B3 B2 B1 | |
426 | * | |
427 | * XX always 80 | |
428 | * YY always 00 | |
429 | * B1-B4 "should" be the number of send out beacons. | |
430 | */ | |
431 | break; | |
432 | ||
433 | case 0xc3: | |
434 | /* End of Atim Window */ | |
435 | break; | |
436 | ||
437 | case 0xc4: | |
438 | case 0xc5: | |
439 | /* BlockACK events */ | |
440 | break; | |
441 | ||
442 | case 0xc6: | |
443 | /* Watchdog Interrupt */ | |
444 | break; | |
445 | ||
446 | case 0xc9: | |
447 | /* retransmission issue / SIFS/EIFS collision ?! */ | |
448 | break; | |
449 | ||
450 | default: | |
451 | printk(KERN_INFO "received unhandled event %x\n", cmd->type); | |
452 | print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len); | |
453 | break; | |
454 | } | |
455 | } | |
456 | ||
cca84799 | 457 | static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar) |
e9348cdd | 458 | { |
cca84799 CL |
459 | memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head)); |
460 | ar->rx_mpdu.has_plcp = false; | |
461 | } | |
e9348cdd | 462 | |
cca84799 CL |
463 | static int ar9170_nag_limiter(struct ar9170 *ar) |
464 | { | |
465 | bool print_message; | |
466 | ||
467 | /* | |
468 | * we expect all sorts of errors in promiscuous mode. | |
469 | * don't bother with it, it's OK! | |
470 | */ | |
471 | if (ar->sniffer_enabled) | |
472 | return false; | |
473 | ||
474 | /* | |
475 | * only go for frequent errors! The hardware tends to | |
476 | * do some stupid thing once in a while under load, in | |
477 | * noisy environments or just for fun! | |
478 | */ | |
479 | if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit()) | |
480 | print_message = true; | |
481 | else | |
482 | print_message = false; | |
483 | ||
484 | /* reset threshold for "once in a while" */ | |
485 | ar->bad_hw_nagger = jiffies + HZ / 4; | |
486 | return print_message; | |
487 | } | |
488 | ||
489 | static int ar9170_rx_mac_status(struct ar9170 *ar, | |
490 | struct ar9170_rx_head *head, | |
491 | struct ar9170_rx_macstatus *mac, | |
492 | struct ieee80211_rx_status *status) | |
493 | { | |
494 | u8 error, decrypt; | |
e9348cdd | 495 | |
e9348cdd | 496 | BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12); |
cca84799 | 497 | BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4); |
e9348cdd | 498 | |
cca84799 CL |
499 | error = mac->error; |
500 | if (error & AR9170_RX_ERROR_MMIC) { | |
501 | status->flag |= RX_FLAG_MMIC_ERROR; | |
502 | error &= ~AR9170_RX_ERROR_MMIC; | |
503 | } | |
e9348cdd | 504 | |
cca84799 CL |
505 | if (error & AR9170_RX_ERROR_PLCP) { |
506 | status->flag |= RX_FLAG_FAILED_PLCP_CRC; | |
507 | error &= ~AR9170_RX_ERROR_PLCP; | |
e9348cdd | 508 | |
cca84799 CL |
509 | if (!(ar->filter_state & FIF_PLCPFAIL)) |
510 | return -EINVAL; | |
511 | } | |
e9348cdd | 512 | |
cca84799 CL |
513 | if (error & AR9170_RX_ERROR_FCS) { |
514 | status->flag |= RX_FLAG_FAILED_FCS_CRC; | |
515 | error &= ~AR9170_RX_ERROR_FCS; | |
e9348cdd | 516 | |
cca84799 CL |
517 | if (!(ar->filter_state & FIF_FCSFAIL)) |
518 | return -EINVAL; | |
519 | } | |
520 | ||
521 | decrypt = ar9170_get_decrypt_type(mac); | |
522 | if (!(decrypt & AR9170_RX_ENC_SOFTWARE) && | |
523 | decrypt != AR9170_ENC_ALG_NONE) | |
524 | status->flag |= RX_FLAG_DECRYPTED; | |
e9348cdd | 525 | |
cca84799 CL |
526 | /* ignore wrong RA errors */ |
527 | error &= ~AR9170_RX_ERROR_WRONG_RA; | |
e9348cdd | 528 | |
cca84799 CL |
529 | if (error & AR9170_RX_ERROR_DECRYPT) { |
530 | error &= ~AR9170_RX_ERROR_DECRYPT; | |
531 | /* | |
532 | * Rx decryption is done in place, | |
533 | * the original data is lost anyway. | |
534 | */ | |
535 | ||
536 | return -EINVAL; | |
537 | } | |
538 | ||
539 | /* drop any other error frames */ | |
540 | if (unlikely(error)) { | |
541 | /* TODO: update netdevice's RX dropped/errors statistics */ | |
542 | ||
543 | if (ar9170_nag_limiter(ar)) | |
544 | printk(KERN_DEBUG "%s: received frame with " | |
545 | "suspicious error code (%#x).\n", | |
546 | wiphy_name(ar->hw->wiphy), error); | |
547 | ||
548 | return -EINVAL; | |
549 | } | |
550 | ||
551 | status->band = ar->channel->band; | |
552 | status->freq = ar->channel->center_freq; | |
553 | ||
554 | switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) { | |
e9348cdd | 555 | case AR9170_RX_STATUS_MODULATION_CCK: |
cca84799 CL |
556 | if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE) |
557 | status->flag |= RX_FLAG_SHORTPRE; | |
e9348cdd CL |
558 | switch (head->plcp[0]) { |
559 | case 0x0a: | |
cca84799 | 560 | status->rate_idx = 0; |
e9348cdd CL |
561 | break; |
562 | case 0x14: | |
cca84799 | 563 | status->rate_idx = 1; |
e9348cdd CL |
564 | break; |
565 | case 0x37: | |
cca84799 | 566 | status->rate_idx = 2; |
e9348cdd CL |
567 | break; |
568 | case 0x6e: | |
cca84799 | 569 | status->rate_idx = 3; |
e9348cdd CL |
570 | break; |
571 | default: | |
cca84799 | 572 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
573 | printk(KERN_ERR "%s: invalid plcp cck rate " |
574 | "(%x).\n", wiphy_name(ar->hw->wiphy), | |
575 | head->plcp[0]); | |
cca84799 | 576 | return -EINVAL; |
e9348cdd CL |
577 | } |
578 | break; | |
cca84799 | 579 | |
e9348cdd | 580 | case AR9170_RX_STATUS_MODULATION_OFDM: |
cca84799 CL |
581 | switch (head->plcp[0] & 0xf) { |
582 | case 0xb: | |
583 | status->rate_idx = 0; | |
e9348cdd | 584 | break; |
cca84799 CL |
585 | case 0xf: |
586 | status->rate_idx = 1; | |
e9348cdd | 587 | break; |
cca84799 CL |
588 | case 0xa: |
589 | status->rate_idx = 2; | |
e9348cdd | 590 | break; |
cca84799 CL |
591 | case 0xe: |
592 | status->rate_idx = 3; | |
e9348cdd CL |
593 | break; |
594 | case 0x9: | |
cca84799 | 595 | status->rate_idx = 4; |
e9348cdd | 596 | break; |
cca84799 CL |
597 | case 0xd: |
598 | status->rate_idx = 5; | |
e9348cdd CL |
599 | break; |
600 | case 0x8: | |
cca84799 | 601 | status->rate_idx = 6; |
e9348cdd | 602 | break; |
cca84799 CL |
603 | case 0xc: |
604 | status->rate_idx = 7; | |
e9348cdd CL |
605 | break; |
606 | default: | |
cca84799 | 607 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
608 | printk(KERN_ERR "%s: invalid plcp ofdm rate " |
609 | "(%x).\n", wiphy_name(ar->hw->wiphy), | |
610 | head->plcp[0]); | |
cca84799 | 611 | return -EINVAL; |
e9348cdd | 612 | } |
cca84799 CL |
613 | if (status->band == IEEE80211_BAND_2GHZ) |
614 | status->rate_idx += 4; | |
e9348cdd | 615 | break; |
cca84799 | 616 | |
e9348cdd | 617 | case AR9170_RX_STATUS_MODULATION_HT: |
cca84799 CL |
618 | if (head->plcp[3] & 0x80) |
619 | status->flag |= RX_FLAG_40MHZ; | |
620 | if (head->plcp[6] & 0x80) | |
621 | status->flag |= RX_FLAG_SHORT_GI; | |
622 | ||
623 | status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f); | |
624 | status->flag |= RX_FLAG_HT; | |
625 | break; | |
626 | ||
e9348cdd CL |
627 | case AR9170_RX_STATUS_MODULATION_DUPOFDM: |
628 | /* XXX */ | |
cca84799 | 629 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
630 | printk(KERN_ERR "%s: invalid modulation\n", |
631 | wiphy_name(ar->hw->wiphy)); | |
cca84799 | 632 | return -EINVAL; |
e9348cdd CL |
633 | } |
634 | ||
cca84799 CL |
635 | return 0; |
636 | } | |
e9348cdd | 637 | |
cca84799 CL |
638 | static void ar9170_rx_phy_status(struct ar9170 *ar, |
639 | struct ar9170_rx_phystatus *phy, | |
640 | struct ieee80211_rx_status *status) | |
641 | { | |
642 | int i; | |
e9348cdd | 643 | |
cca84799 CL |
644 | BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20); |
645 | ||
646 | for (i = 0; i < 3; i++) | |
647 | if (phy->rssi[i] != 0x80) | |
648 | status->antenna |= BIT(i); | |
649 | ||
650 | /* post-process RSSI */ | |
651 | for (i = 0; i < 7; i++) | |
652 | if (phy->rssi[i] & 0x80) | |
653 | phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f; | |
654 | ||
655 | /* TODO: we could do something with phy_errors */ | |
656 | status->signal = ar->noise[0] + phy->rssi_combined; | |
657 | status->noise = ar->noise[0]; | |
658 | } | |
659 | ||
660 | static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len) | |
661 | { | |
662 | struct sk_buff *skb; | |
663 | int reserved = 0; | |
664 | struct ieee80211_hdr *hdr = (void *) buf; | |
665 | ||
666 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
667 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
668 | reserved += NET_IP_ALIGN; | |
669 | ||
670 | if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) | |
671 | reserved += NET_IP_ALIGN; | |
e9348cdd CL |
672 | } |
673 | ||
cca84799 CL |
674 | if (ieee80211_has_a4(hdr->frame_control)) |
675 | reserved += NET_IP_ALIGN; | |
676 | ||
677 | reserved = 32 + (reserved & NET_IP_ALIGN); | |
678 | ||
679 | skb = dev_alloc_skb(len + reserved); | |
680 | if (likely(skb)) { | |
681 | skb_reserve(skb, reserved); | |
682 | memcpy(skb_put(skb, len), buf, len); | |
e9348cdd CL |
683 | } |
684 | ||
cca84799 CL |
685 | return skb; |
686 | } | |
e9348cdd | 687 | |
cca84799 CL |
688 | /* |
689 | * If the frame alignment is right (or the kernel has | |
690 | * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there | |
691 | * is only a single MPDU in the USB frame, then we could | |
692 | * submit to mac80211 the SKB directly. However, since | |
693 | * there may be multiple packets in one SKB in stream | |
694 | * mode, and we need to observe the proper ordering, | |
695 | * this is non-trivial. | |
696 | */ | |
e9348cdd | 697 | |
cca84799 CL |
698 | static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) |
699 | { | |
700 | struct ar9170_rx_head *head; | |
701 | struct ar9170_rx_macstatus *mac; | |
702 | struct ar9170_rx_phystatus *phy = NULL; | |
703 | struct ieee80211_rx_status status; | |
704 | struct sk_buff *skb; | |
705 | int mpdu_len; | |
706 | ||
707 | if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac)))) | |
708 | return ; | |
709 | ||
710 | /* Received MPDU */ | |
711 | mpdu_len = len - sizeof(*mac); | |
712 | ||
713 | mac = (void *)(buf + mpdu_len); | |
714 | if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) { | |
715 | /* this frame is too damaged and can't be used - drop it */ | |
e9348cdd | 716 | |
e9348cdd CL |
717 | return ; |
718 | } | |
719 | ||
cca84799 CL |
720 | switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) { |
721 | case AR9170_RX_STATUS_MPDU_FIRST: | |
722 | /* first mpdu packet has the plcp header */ | |
723 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) { | |
724 | head = (void *) buf; | |
725 | memcpy(&ar->rx_mpdu.plcp, (void *) buf, | |
726 | sizeof(struct ar9170_rx_head)); | |
727 | ||
728 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
729 | buf += sizeof(struct ar9170_rx_head); | |
730 | ar->rx_mpdu.has_plcp = true; | |
731 | } else { | |
732 | if (ar9170_nag_limiter(ar)) | |
733 | printk(KERN_ERR "%s: plcp info is clipped.\n", | |
734 | wiphy_name(ar->hw->wiphy)); | |
735 | return ; | |
736 | } | |
737 | break; | |
738 | ||
739 | case AR9170_RX_STATUS_MPDU_LAST: | |
740 | /* last mpdu has a extra tail with phy status information */ | |
741 | ||
742 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) { | |
743 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
744 | phy = (void *)(buf + mpdu_len); | |
745 | } else { | |
746 | if (ar9170_nag_limiter(ar)) | |
747 | printk(KERN_ERR "%s: frame tail is clipped.\n", | |
748 | wiphy_name(ar->hw->wiphy)); | |
749 | return ; | |
750 | } | |
751 | ||
752 | case AR9170_RX_STATUS_MPDU_MIDDLE: | |
753 | /* middle mpdus are just data */ | |
754 | if (unlikely(!ar->rx_mpdu.has_plcp)) { | |
755 | if (!ar9170_nag_limiter(ar)) | |
756 | return ; | |
757 | ||
758 | printk(KERN_ERR "%s: rx stream did not start " | |
759 | "with a first_mpdu frame tag.\n", | |
760 | wiphy_name(ar->hw->wiphy)); | |
761 | ||
762 | return ; | |
763 | } | |
764 | ||
765 | head = &ar->rx_mpdu.plcp; | |
766 | break; | |
767 | ||
768 | case AR9170_RX_STATUS_MPDU_SINGLE: | |
769 | /* single mpdu - has plcp (head) and phy status (tail) */ | |
770 | head = (void *) buf; | |
771 | ||
772 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
773 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
774 | ||
775 | buf += sizeof(struct ar9170_rx_head); | |
776 | phy = (void *)(buf + mpdu_len); | |
777 | break; | |
778 | ||
779 | default: | |
780 | BUG_ON(1); | |
781 | break; | |
e9348cdd CL |
782 | } |
783 | ||
cca84799 CL |
784 | if (unlikely(mpdu_len < FCS_LEN)) |
785 | return ; | |
e9348cdd | 786 | |
cca84799 CL |
787 | memset(&status, 0, sizeof(status)); |
788 | if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status))) | |
789 | return ; | |
e9348cdd | 790 | |
cca84799 CL |
791 | if (phy) |
792 | ar9170_rx_phy_status(ar, phy, &status); | |
e9348cdd | 793 | |
cca84799 CL |
794 | skb = ar9170_rx_copy_data(buf, mpdu_len); |
795 | if (likely(skb)) | |
796 | ieee80211_rx_irqsafe(ar->hw, skb, &status); | |
e9348cdd CL |
797 | } |
798 | ||
e9348cdd CL |
799 | void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb) |
800 | { | |
cca84799 | 801 | unsigned int i, tlen, resplen, wlen = 0, clen = 0; |
e9348cdd CL |
802 | u8 *tbuf, *respbuf; |
803 | ||
804 | tbuf = skb->data; | |
805 | tlen = skb->len; | |
806 | ||
807 | while (tlen >= 4) { | |
cca84799 CL |
808 | clen = tbuf[1] << 8 | tbuf[0]; |
809 | wlen = ALIGN(clen, 4); | |
e9348cdd | 810 | |
cca84799 | 811 | /* check if this is stream has a valid tag.*/ |
e9348cdd | 812 | if (tbuf[2] != 0 || tbuf[3] != 0x4e) { |
cca84799 CL |
813 | /* |
814 | * TODO: handle the highly unlikely event that the | |
815 | * corrupted stream has the TAG at the right position. | |
816 | */ | |
817 | ||
818 | /* check if the frame can be repaired. */ | |
819 | if (!ar->rx_failover_missing) { | |
820 | /* this is no "short read". */ | |
821 | if (ar9170_nag_limiter(ar)) { | |
822 | printk(KERN_ERR "%s: missing tag!\n", | |
823 | wiphy_name(ar->hw->wiphy)); | |
824 | goto err_telluser; | |
825 | } else | |
826 | goto err_silent; | |
827 | } | |
828 | ||
829 | if (ar->rx_failover_missing > tlen) { | |
830 | if (ar9170_nag_limiter(ar)) { | |
831 | printk(KERN_ERR "%s: possible multi " | |
832 | "stream corruption!\n", | |
833 | wiphy_name(ar->hw->wiphy)); | |
834 | goto err_telluser; | |
835 | } else | |
836 | goto err_silent; | |
837 | } | |
838 | ||
839 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
840 | ar->rx_failover_missing -= tlen; | |
841 | ||
842 | if (ar->rx_failover_missing <= 0) { | |
843 | /* | |
844 | * nested ar9170_rx call! | |
845 | * termination is guranteed, even when the | |
846 | * combined frame also have a element with | |
847 | * a bad tag. | |
848 | */ | |
849 | ||
850 | ar->rx_failover_missing = 0; | |
851 | ar9170_rx(ar, ar->rx_failover); | |
852 | ||
853 | skb_reset_tail_pointer(ar->rx_failover); | |
854 | skb_trim(ar->rx_failover, 0); | |
855 | } | |
856 | ||
e9348cdd CL |
857 | return ; |
858 | } | |
cca84799 CL |
859 | |
860 | /* check if stream is clipped */ | |
e9348cdd | 861 | if (wlen > tlen - 4) { |
cca84799 CL |
862 | if (ar->rx_failover_missing) { |
863 | /* TODO: handle double stream corruption. */ | |
864 | if (ar9170_nag_limiter(ar)) { | |
865 | printk(KERN_ERR "%s: double rx stream " | |
866 | "corruption!\n", | |
867 | wiphy_name(ar->hw->wiphy)); | |
868 | goto err_telluser; | |
869 | } else | |
870 | goto err_silent; | |
871 | } | |
872 | ||
873 | /* | |
874 | * save incomplete data set. | |
875 | * the firmware will resend the missing bits when | |
876 | * the rx - descriptor comes round again. | |
877 | */ | |
878 | ||
879 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
880 | ar->rx_failover_missing = clen - tlen; | |
e9348cdd CL |
881 | return ; |
882 | } | |
883 | resplen = clen; | |
884 | respbuf = tbuf + 4; | |
885 | tbuf += wlen + 4; | |
886 | tlen -= wlen + 4; | |
887 | ||
888 | i = 0; | |
889 | ||
890 | /* weird thing, but this is the same in the original driver */ | |
891 | while (resplen > 2 && i < 12 && | |
892 | respbuf[0] == 0xff && respbuf[1] == 0xff) { | |
893 | i += 2; | |
894 | resplen -= 2; | |
895 | respbuf += 2; | |
896 | } | |
897 | ||
898 | if (resplen < 4) | |
899 | continue; | |
900 | ||
901 | /* found the 6 * 0xffff marker? */ | |
902 | if (i == 12) | |
903 | ar9170_handle_command_response(ar, respbuf, resplen); | |
904 | else | |
cca84799 | 905 | ar9170_handle_mpdu(ar, respbuf, clen); |
e9348cdd CL |
906 | } |
907 | ||
cca84799 CL |
908 | if (tlen) { |
909 | if (net_ratelimit()) | |
910 | printk(KERN_ERR "%s: %d bytes of unprocessed " | |
911 | "data left in rx stream!\n", | |
912 | wiphy_name(ar->hw->wiphy), tlen); | |
913 | ||
914 | goto err_telluser; | |
915 | } | |
916 | ||
917 | return ; | |
918 | ||
919 | err_telluser: | |
920 | printk(KERN_ERR "%s: damaged RX stream data [want:%d, " | |
921 | "data:%d, rx:%d, pending:%d ]\n", | |
922 | wiphy_name(ar->hw->wiphy), clen, wlen, tlen, | |
923 | ar->rx_failover_missing); | |
924 | ||
925 | if (ar->rx_failover_missing) | |
926 | print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET, | |
927 | ar->rx_failover->data, | |
928 | ar->rx_failover->len); | |
929 | ||
930 | print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET, | |
931 | skb->data, skb->len); | |
932 | ||
933 | printk(KERN_ERR "%s: please check your hardware and cables, if " | |
934 | "you see this message frequently.\n", | |
935 | wiphy_name(ar->hw->wiphy)); | |
936 | ||
937 | err_silent: | |
938 | if (ar->rx_failover_missing) { | |
939 | skb_reset_tail_pointer(ar->rx_failover); | |
940 | skb_trim(ar->rx_failover, 0); | |
941 | ar->rx_failover_missing = 0; | |
942 | } | |
e9348cdd | 943 | } |
e9348cdd CL |
944 | |
945 | #define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \ | |
946 | do { \ | |
947 | queue.aifs = ai_fs; \ | |
948 | queue.cw_min = cwmin; \ | |
949 | queue.cw_max = cwmax; \ | |
950 | queue.txop = _txop; \ | |
951 | } while (0) | |
952 | ||
953 | static int ar9170_op_start(struct ieee80211_hw *hw) | |
954 | { | |
955 | struct ar9170 *ar = hw->priv; | |
956 | int err, i; | |
957 | ||
958 | mutex_lock(&ar->mutex); | |
959 | ||
960 | /* reinitialize queues statistics */ | |
961 | memset(&ar->tx_stats, 0, sizeof(ar->tx_stats)); | |
962 | for (i = 0; i < ARRAY_SIZE(ar->tx_stats); i++) | |
963 | ar->tx_stats[i].limit = 8; | |
964 | ||
965 | /* reset QoS defaults */ | |
966 | AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/ | |
967 | AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */ | |
968 | AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */ | |
969 | AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */ | |
970 | AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */ | |
971 | ||
cca84799 CL |
972 | ar->bad_hw_nagger = jiffies; |
973 | ||
e9348cdd CL |
974 | err = ar->open(ar); |
975 | if (err) | |
976 | goto out; | |
977 | ||
978 | err = ar9170_init_mac(ar); | |
979 | if (err) | |
980 | goto out; | |
981 | ||
982 | err = ar9170_set_qos(ar); | |
983 | if (err) | |
984 | goto out; | |
985 | ||
986 | err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ); | |
987 | if (err) | |
988 | goto out; | |
989 | ||
990 | err = ar9170_init_rf(ar); | |
991 | if (err) | |
992 | goto out; | |
993 | ||
994 | /* start DMA */ | |
995 | err = ar9170_write_reg(ar, 0x1c3d30, 0x100); | |
996 | if (err) | |
997 | goto out; | |
998 | ||
999 | ar->state = AR9170_STARTED; | |
1000 | ||
1001 | out: | |
1002 | mutex_unlock(&ar->mutex); | |
1003 | return err; | |
1004 | } | |
1005 | ||
1006 | static void ar9170_op_stop(struct ieee80211_hw *hw) | |
1007 | { | |
1008 | struct ar9170 *ar = hw->priv; | |
1009 | ||
1010 | if (IS_STARTED(ar)) | |
1011 | ar->state = AR9170_IDLE; | |
1012 | ||
32c1628f | 1013 | flush_workqueue(ar->hw->workqueue); |
e9348cdd | 1014 | |
32c1628f | 1015 | mutex_lock(&ar->mutex); |
e9348cdd CL |
1016 | cancel_delayed_work_sync(&ar->tx_status_janitor); |
1017 | cancel_work_sync(&ar->filter_config_work); | |
1018 | cancel_work_sync(&ar->beacon_work); | |
1019 | skb_queue_purge(&ar->global_tx_status_waste); | |
1020 | skb_queue_purge(&ar->global_tx_status); | |
1021 | ||
1022 | if (IS_ACCEPTING_CMD(ar)) { | |
1023 | ar9170_set_leds_state(ar, 0); | |
1024 | ||
1025 | /* stop DMA */ | |
1026 | ar9170_write_reg(ar, 0x1c3d30, 0); | |
1027 | ar->stop(ar); | |
1028 | } | |
1029 | ||
1030 | mutex_unlock(&ar->mutex); | |
1031 | } | |
1032 | ||
1033 | int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) | |
1034 | { | |
1035 | struct ar9170 *ar = hw->priv; | |
1036 | struct ieee80211_hdr *hdr; | |
1037 | struct ar9170_tx_control *txc; | |
1038 | struct ieee80211_tx_info *info; | |
1039 | struct ieee80211_rate *rate = NULL; | |
1040 | struct ieee80211_tx_rate *txrate; | |
1041 | unsigned int queue = skb_get_queue_mapping(skb); | |
1042 | unsigned long flags = 0; | |
1043 | struct ar9170_sta_info *sta_info = NULL; | |
1044 | u32 power, chains; | |
1045 | u16 keytype = 0; | |
1046 | u16 len, icv = 0; | |
1047 | int err; | |
1048 | bool tx_status; | |
1049 | ||
1050 | if (unlikely(!IS_STARTED(ar))) | |
1051 | goto err_free; | |
1052 | ||
1053 | hdr = (void *)skb->data; | |
1054 | info = IEEE80211_SKB_CB(skb); | |
1055 | len = skb->len; | |
1056 | ||
1057 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1058 | if (ar->tx_stats[queue].limit < ar->tx_stats[queue].len) { | |
1059 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1060 | return NETDEV_TX_OK; | |
1061 | } | |
1062 | ||
1063 | ar->tx_stats[queue].len++; | |
1064 | ar->tx_stats[queue].count++; | |
1065 | if (ar->tx_stats[queue].limit == ar->tx_stats[queue].len) | |
1066 | ieee80211_stop_queue(hw, queue); | |
1067 | ||
1068 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1069 | ||
1070 | txc = (void *)skb_push(skb, sizeof(*txc)); | |
1071 | ||
1072 | tx_status = (((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) != 0) || | |
1073 | ((info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) != 0)); | |
1074 | ||
1075 | if (info->control.hw_key) { | |
1076 | icv = info->control.hw_key->icv_len; | |
1077 | ||
1078 | switch (info->control.hw_key->alg) { | |
1079 | case ALG_WEP: | |
1080 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1081 | break; | |
1082 | case ALG_TKIP: | |
1083 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1084 | break; | |
1085 | case ALG_CCMP: | |
1086 | keytype = AR9170_TX_MAC_ENCR_AES; | |
1087 | break; | |
1088 | default: | |
1089 | WARN_ON(1); | |
1090 | goto err_dequeue; | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | /* Length */ | |
1095 | txc->length = cpu_to_le16(len + icv + 4); | |
1096 | ||
1097 | txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION | | |
1098 | AR9170_TX_MAC_BACKOFF); | |
1099 | txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] << | |
1100 | AR9170_TX_MAC_QOS_SHIFT); | |
1101 | txc->mac_control |= cpu_to_le16(keytype); | |
1102 | txc->phy_control = cpu_to_le32(0); | |
1103 | ||
1104 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1105 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK); | |
1106 | ||
1107 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
1108 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR); | |
1109 | ||
1110 | txrate = &info->control.rates[0]; | |
1111 | ||
1112 | if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) | |
1113 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS); | |
1114 | else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS) | |
1115 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS); | |
1116 | ||
1117 | if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD) | |
1118 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD); | |
1119 | ||
1120 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) | |
1121 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE); | |
1122 | ||
1123 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
1124 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ); | |
1125 | /* this works because 40 MHz is 2 and dup is 3 */ | |
1126 | if (txrate->flags & IEEE80211_TX_RC_DUP_DATA) | |
1127 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP); | |
1128 | ||
1129 | if (txrate->flags & IEEE80211_TX_RC_SHORT_GI) | |
1130 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI); | |
1131 | ||
1132 | if (txrate->flags & IEEE80211_TX_RC_MCS) { | |
1133 | u32 r = txrate->idx; | |
1134 | u8 *txpower; | |
1135 | ||
1136 | r <<= AR9170_TX_PHY_MCS_SHIFT; | |
1137 | if (WARN_ON(r & ~AR9170_TX_PHY_MCS_MASK)) | |
1138 | goto err_dequeue; | |
1139 | txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK); | |
1140 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT); | |
1141 | ||
1142 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) { | |
1143 | if (info->band == IEEE80211_BAND_5GHZ) | |
1144 | txpower = ar->power_5G_ht40; | |
1145 | else | |
1146 | txpower = ar->power_2G_ht40; | |
1147 | } else { | |
1148 | if (info->band == IEEE80211_BAND_5GHZ) | |
1149 | txpower = ar->power_5G_ht20; | |
1150 | else | |
1151 | txpower = ar->power_2G_ht20; | |
1152 | } | |
1153 | ||
1154 | power = txpower[(txrate->idx) & 7]; | |
1155 | } else { | |
1156 | u8 *txpower; | |
1157 | u32 mod; | |
1158 | u32 phyrate; | |
1159 | u8 idx = txrate->idx; | |
1160 | ||
1161 | if (info->band != IEEE80211_BAND_2GHZ) { | |
1162 | idx += 4; | |
1163 | txpower = ar->power_5G_leg; | |
1164 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1165 | } else { | |
1166 | if (idx < 4) { | |
1167 | txpower = ar->power_2G_cck; | |
1168 | mod = AR9170_TX_PHY_MOD_CCK; | |
1169 | } else { | |
1170 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1171 | txpower = ar->power_2G_ofdm; | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | rate = &__ar9170_ratetable[idx]; | |
1176 | ||
1177 | phyrate = rate->hw_value & 0xF; | |
1178 | power = txpower[(rate->hw_value & 0x30) >> 4]; | |
1179 | phyrate <<= AR9170_TX_PHY_MCS_SHIFT; | |
1180 | ||
1181 | txc->phy_control |= cpu_to_le32(mod); | |
1182 | txc->phy_control |= cpu_to_le32(phyrate); | |
1183 | } | |
1184 | ||
1185 | power <<= AR9170_TX_PHY_TX_PWR_SHIFT; | |
1186 | power &= AR9170_TX_PHY_TX_PWR_MASK; | |
1187 | txc->phy_control |= cpu_to_le32(power); | |
1188 | ||
1189 | /* set TX chains */ | |
1190 | if (ar->eeprom.tx_mask == 1) { | |
1191 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1192 | } else { | |
1193 | chains = AR9170_TX_PHY_TXCHAIN_2; | |
1194 | ||
1195 | /* >= 36M legacy OFDM - use only one chain */ | |
1196 | if (rate && rate->bitrate >= 360) | |
1197 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1198 | } | |
1199 | txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT); | |
1200 | ||
1201 | if (tx_status) { | |
1202 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE); | |
1203 | /* | |
1204 | * WARNING: | |
1205 | * Putting the QoS queue bits into an unexplored territory is | |
1206 | * certainly not elegant. | |
1207 | * | |
1208 | * In my defense: This idea provides a reasonable way to | |
1209 | * smuggle valuable information to the tx_status callback. | |
1210 | * Also, the idea behind this bit-abuse came straight from | |
1211 | * the original driver code. | |
1212 | */ | |
1213 | ||
1214 | txc->phy_control |= | |
1215 | cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT); | |
1216 | ||
1217 | if (info->control.sta) { | |
1218 | sta_info = (void *) info->control.sta->drv_priv; | |
4a48e2a4 | 1219 | skb_queue_tail(&sta_info->tx_status[queue], skb); |
e9348cdd CL |
1220 | } else { |
1221 | skb_queue_tail(&ar->global_tx_status, skb); | |
1222 | ||
1223 | queue_delayed_work(ar->hw->workqueue, | |
1224 | &ar->tx_status_janitor, | |
1225 | msecs_to_jiffies(100)); | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | err = ar->tx(ar, skb, tx_status, 0); | |
1230 | if (unlikely(tx_status && err)) { | |
1231 | if (info->control.sta) | |
4a48e2a4 | 1232 | skb_unlink(skb, &sta_info->tx_status[queue]); |
e9348cdd CL |
1233 | else |
1234 | skb_unlink(skb, &ar->global_tx_status); | |
1235 | } | |
1236 | ||
1237 | return NETDEV_TX_OK; | |
1238 | ||
1239 | err_dequeue: | |
1240 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1241 | ar->tx_stats[queue].len--; | |
1242 | ar->tx_stats[queue].count--; | |
1243 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1244 | ||
1245 | err_free: | |
1246 | dev_kfree_skb(skb); | |
1247 | return NETDEV_TX_OK; | |
1248 | } | |
1249 | ||
1250 | static int ar9170_op_add_interface(struct ieee80211_hw *hw, | |
1251 | struct ieee80211_if_init_conf *conf) | |
1252 | { | |
1253 | struct ar9170 *ar = hw->priv; | |
1254 | int err = 0; | |
1255 | ||
1256 | mutex_lock(&ar->mutex); | |
1257 | ||
1258 | if (ar->vif) { | |
1259 | err = -EBUSY; | |
1260 | goto unlock; | |
1261 | } | |
1262 | ||
1263 | ar->vif = conf->vif; | |
1264 | memcpy(ar->mac_addr, conf->mac_addr, ETH_ALEN); | |
1265 | ||
1266 | if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) { | |
1267 | ar->rx_software_decryption = true; | |
1268 | ar->disable_offload = true; | |
1269 | } | |
1270 | ||
1271 | ar->cur_filter = 0; | |
1272 | ar->want_filter = AR9170_MAC_REG_FTF_DEFAULTS; | |
1273 | err = ar9170_update_frame_filter(ar); | |
1274 | if (err) | |
1275 | goto unlock; | |
1276 | ||
1277 | err = ar9170_set_operating_mode(ar); | |
1278 | ||
1279 | unlock: | |
1280 | mutex_unlock(&ar->mutex); | |
1281 | return err; | |
1282 | } | |
1283 | ||
1284 | static void ar9170_op_remove_interface(struct ieee80211_hw *hw, | |
1285 | struct ieee80211_if_init_conf *conf) | |
1286 | { | |
1287 | struct ar9170 *ar = hw->priv; | |
1288 | ||
1289 | mutex_lock(&ar->mutex); | |
1290 | ar->vif = NULL; | |
1291 | ar->want_filter = 0; | |
1292 | ar9170_update_frame_filter(ar); | |
1293 | ar9170_set_beacon_timers(ar); | |
1294 | dev_kfree_skb(ar->beacon); | |
1295 | ar->beacon = NULL; | |
1296 | ar->sniffer_enabled = false; | |
1297 | ar->rx_software_decryption = false; | |
1298 | ar9170_set_operating_mode(ar); | |
1299 | mutex_unlock(&ar->mutex); | |
1300 | } | |
1301 | ||
1302 | static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed) | |
1303 | { | |
1304 | struct ar9170 *ar = hw->priv; | |
1305 | int err = 0; | |
1306 | ||
1307 | mutex_lock(&ar->mutex); | |
1308 | ||
1309 | if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) { | |
1310 | /* TODO */ | |
1311 | err = 0; | |
1312 | } | |
1313 | ||
1314 | if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) { | |
1315 | /* TODO */ | |
1316 | err = 0; | |
1317 | } | |
1318 | ||
1319 | if (changed & IEEE80211_CONF_CHANGE_PS) { | |
1320 | /* TODO */ | |
1321 | err = 0; | |
1322 | } | |
1323 | ||
1324 | if (changed & IEEE80211_CONF_CHANGE_POWER) { | |
1325 | /* TODO */ | |
1326 | err = 0; | |
1327 | } | |
1328 | ||
1329 | if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) { | |
1330 | /* | |
1331 | * is it long_frame_max_tx_count or short_frame_max_tx_count? | |
1332 | */ | |
1333 | ||
1334 | err = ar9170_set_hwretry_limit(ar, | |
1335 | ar->hw->conf.long_frame_max_tx_count); | |
1336 | if (err) | |
1337 | goto out; | |
1338 | } | |
1339 | ||
57c4d7b4 | 1340 | if (changed & BSS_CHANGED_BEACON_INT) { |
e9348cdd CL |
1341 | err = ar9170_set_beacon_timers(ar); |
1342 | if (err) | |
1343 | goto out; | |
1344 | } | |
1345 | ||
1346 | if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { | |
1347 | err = ar9170_set_channel(ar, hw->conf.channel, | |
9e52b062 JB |
1348 | AR9170_RFI_NONE, |
1349 | nl80211_to_ar9170(hw->conf.channel_type)); | |
e9348cdd CL |
1350 | if (err) |
1351 | goto out; | |
1352 | /* adjust slot time for 5 GHz */ | |
1353 | if (hw->conf.channel->band == IEEE80211_BAND_5GHZ) | |
1354 | err = ar9170_write_reg(ar, AR9170_MAC_REG_SLOT_TIME, | |
1355 | 9 << 10); | |
1356 | } | |
1357 | ||
1358 | out: | |
1359 | mutex_unlock(&ar->mutex); | |
1360 | return err; | |
1361 | } | |
1362 | ||
e9348cdd CL |
1363 | static void ar9170_set_filters(struct work_struct *work) |
1364 | { | |
1365 | struct ar9170 *ar = container_of(work, struct ar9170, | |
1366 | filter_config_work); | |
1367 | int err; | |
1368 | ||
e9348cdd | 1369 | if (unlikely(!IS_STARTED(ar))) |
32c1628f | 1370 | return ; |
e9348cdd | 1371 | |
32c1628f | 1372 | mutex_lock(&ar->mutex); |
e9348cdd CL |
1373 | if (ar->filter_changed & AR9170_FILTER_CHANGED_PROMISC) { |
1374 | err = ar9170_set_operating_mode(ar); | |
1375 | if (err) | |
1376 | goto unlock; | |
1377 | } | |
1378 | ||
1379 | if (ar->filter_changed & AR9170_FILTER_CHANGED_MULTICAST) { | |
1380 | err = ar9170_update_multicast(ar); | |
1381 | if (err) | |
1382 | goto unlock; | |
1383 | } | |
1384 | ||
1385 | if (ar->filter_changed & AR9170_FILTER_CHANGED_FRAMEFILTER) | |
1386 | err = ar9170_update_frame_filter(ar); | |
1387 | ||
1388 | unlock: | |
1389 | mutex_unlock(&ar->mutex); | |
1390 | } | |
1391 | ||
1392 | static void ar9170_op_configure_filter(struct ieee80211_hw *hw, | |
1393 | unsigned int changed_flags, | |
1394 | unsigned int *new_flags, | |
1395 | int mc_count, struct dev_mc_list *mclist) | |
1396 | { | |
1397 | struct ar9170 *ar = hw->priv; | |
1398 | ||
1399 | /* mask supported flags */ | |
1400 | *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC | | |
cca84799 CL |
1401 | FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL; |
1402 | ar->filter_state = *new_flags; | |
e9348cdd CL |
1403 | /* |
1404 | * We can support more by setting the sniffer bit and | |
1405 | * then checking the error flags, later. | |
1406 | */ | |
1407 | ||
1408 | if (changed_flags & FIF_ALLMULTI) { | |
1409 | if (*new_flags & FIF_ALLMULTI) { | |
1410 | ar->want_mc_hash = ~0ULL; | |
1411 | } else { | |
1412 | u64 mchash; | |
1413 | int i; | |
1414 | ||
1415 | /* always get broadcast frames */ | |
1416 | mchash = 1ULL << (0xff>>2); | |
1417 | ||
1418 | for (i = 0; i < mc_count; i++) { | |
1419 | if (WARN_ON(!mclist)) | |
1420 | break; | |
1421 | mchash |= 1ULL << (mclist->dmi_addr[5] >> 2); | |
1422 | mclist = mclist->next; | |
1423 | } | |
1424 | ar->want_mc_hash = mchash; | |
1425 | } | |
1426 | ar->filter_changed |= AR9170_FILTER_CHANGED_MULTICAST; | |
1427 | } | |
1428 | ||
1429 | if (changed_flags & FIF_CONTROL) { | |
1430 | u32 filter = AR9170_MAC_REG_FTF_PSPOLL | | |
1431 | AR9170_MAC_REG_FTF_RTS | | |
1432 | AR9170_MAC_REG_FTF_CTS | | |
1433 | AR9170_MAC_REG_FTF_ACK | | |
1434 | AR9170_MAC_REG_FTF_CFE | | |
1435 | AR9170_MAC_REG_FTF_CFE_ACK; | |
1436 | ||
1437 | if (*new_flags & FIF_CONTROL) | |
1438 | ar->want_filter = ar->cur_filter | filter; | |
1439 | else | |
1440 | ar->want_filter = ar->cur_filter & ~filter; | |
1441 | ||
1442 | ar->filter_changed |= AR9170_FILTER_CHANGED_FRAMEFILTER; | |
1443 | } | |
1444 | ||
1445 | if (changed_flags & FIF_PROMISC_IN_BSS) { | |
1446 | ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0; | |
1447 | ar->filter_changed |= AR9170_FILTER_CHANGED_PROMISC; | |
1448 | } | |
1449 | ||
1450 | if (likely(IS_STARTED(ar))) | |
1451 | queue_work(ar->hw->workqueue, &ar->filter_config_work); | |
1452 | } | |
1453 | ||
1454 | static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw, | |
1455 | struct ieee80211_vif *vif, | |
1456 | struct ieee80211_bss_conf *bss_conf, | |
1457 | u32 changed) | |
1458 | { | |
1459 | struct ar9170 *ar = hw->priv; | |
1460 | int err = 0; | |
1461 | ||
1462 | mutex_lock(&ar->mutex); | |
1463 | ||
2d0ddec5 JB |
1464 | if (changed & BSS_CHANGED_BSSID) { |
1465 | memcpy(ar->bssid, bss_conf->bssid, ETH_ALEN); | |
1466 | err = ar9170_set_operating_mode(ar); | |
1467 | } | |
1468 | ||
1469 | if (changed & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED)) { | |
1470 | err = ar9170_update_beacon(ar); | |
1471 | if (!err) | |
1472 | ar9170_set_beacon_timers(ar); | |
1473 | } | |
1474 | ||
e9348cdd CL |
1475 | ar9170_regwrite_begin(ar); |
1476 | ||
1477 | if (changed & BSS_CHANGED_ASSOC) { | |
1478 | ar->state = bss_conf->assoc ? AR9170_ASSOCIATED : ar->state; | |
1479 | ||
1480 | #ifndef CONFIG_AR9170_LEDS | |
1481 | /* enable assoc LED. */ | |
1482 | err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0); | |
1483 | #endif /* CONFIG_AR9170_LEDS */ | |
1484 | } | |
1485 | ||
57c4d7b4 JB |
1486 | if (changed & BSS_CHANGED_BEACON_INT) |
1487 | err = ar9170_set_beacon_timers(ar); | |
1488 | ||
e9348cdd CL |
1489 | if (changed & BSS_CHANGED_HT) { |
1490 | /* TODO */ | |
1491 | err = 0; | |
1492 | } | |
1493 | ||
1494 | if (changed & BSS_CHANGED_ERP_SLOT) { | |
1495 | u32 slottime = 20; | |
1496 | ||
1497 | if (bss_conf->use_short_slot) | |
1498 | slottime = 9; | |
1499 | ||
1500 | ar9170_regwrite(AR9170_MAC_REG_SLOT_TIME, slottime << 10); | |
1501 | } | |
1502 | ||
1503 | if (changed & BSS_CHANGED_BASIC_RATES) { | |
1504 | u32 cck, ofdm; | |
1505 | ||
1506 | if (hw->conf.channel->band == IEEE80211_BAND_5GHZ) { | |
1507 | ofdm = bss_conf->basic_rates; | |
1508 | cck = 0; | |
1509 | } else { | |
1510 | /* four cck rates */ | |
1511 | cck = bss_conf->basic_rates & 0xf; | |
1512 | ofdm = bss_conf->basic_rates >> 4; | |
1513 | } | |
1514 | ar9170_regwrite(AR9170_MAC_REG_BASIC_RATE, | |
1515 | ofdm << 8 | cck); | |
1516 | } | |
1517 | ||
1518 | ar9170_regwrite_finish(); | |
1519 | err = ar9170_regwrite_result(); | |
1520 | mutex_unlock(&ar->mutex); | |
1521 | } | |
1522 | ||
1523 | static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw) | |
1524 | { | |
1525 | struct ar9170 *ar = hw->priv; | |
1526 | int err; | |
1527 | u32 tsf_low; | |
1528 | u32 tsf_high; | |
1529 | u64 tsf; | |
1530 | ||
1531 | mutex_lock(&ar->mutex); | |
1532 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_L, &tsf_low); | |
1533 | if (!err) | |
1534 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_H, &tsf_high); | |
1535 | mutex_unlock(&ar->mutex); | |
1536 | ||
1537 | if (WARN_ON(err)) | |
1538 | return 0; | |
1539 | ||
1540 | tsf = tsf_high; | |
1541 | tsf = (tsf << 32) | tsf_low; | |
1542 | return tsf; | |
1543 | } | |
1544 | ||
1545 | static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, | |
1546 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, | |
1547 | struct ieee80211_key_conf *key) | |
1548 | { | |
1549 | struct ar9170 *ar = hw->priv; | |
1550 | int err = 0, i; | |
1551 | u8 ktype; | |
1552 | ||
1553 | if ((!ar->vif) || (ar->disable_offload)) | |
1554 | return -EOPNOTSUPP; | |
1555 | ||
1556 | switch (key->alg) { | |
1557 | case ALG_WEP: | |
1558 | if (key->keylen == LEN_WEP40) | |
1559 | ktype = AR9170_ENC_ALG_WEP64; | |
1560 | else | |
1561 | ktype = AR9170_ENC_ALG_WEP128; | |
1562 | break; | |
1563 | case ALG_TKIP: | |
1564 | ktype = AR9170_ENC_ALG_TKIP; | |
1565 | break; | |
1566 | case ALG_CCMP: | |
1567 | ktype = AR9170_ENC_ALG_AESCCMP; | |
1568 | break; | |
1569 | default: | |
1570 | return -EOPNOTSUPP; | |
1571 | } | |
1572 | ||
1573 | mutex_lock(&ar->mutex); | |
1574 | if (cmd == SET_KEY) { | |
1575 | if (unlikely(!IS_STARTED(ar))) { | |
1576 | err = -EOPNOTSUPP; | |
1577 | goto out; | |
1578 | } | |
1579 | ||
1580 | /* group keys need all-zeroes address */ | |
1581 | if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1582 | sta = NULL; | |
1583 | ||
1584 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) { | |
1585 | for (i = 0; i < 64; i++) | |
1586 | if (!(ar->usedkeys & BIT(i))) | |
1587 | break; | |
1588 | if (i == 64) { | |
1589 | ar->rx_software_decryption = true; | |
1590 | ar9170_set_operating_mode(ar); | |
1591 | err = -ENOSPC; | |
1592 | goto out; | |
1593 | } | |
1594 | } else { | |
1595 | i = 64 + key->keyidx; | |
1596 | } | |
1597 | ||
1598 | key->hw_key_idx = i; | |
1599 | ||
1600 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0, | |
1601 | key->key, min_t(u8, 16, key->keylen)); | |
1602 | if (err) | |
1603 | goto out; | |
1604 | ||
1605 | if (key->alg == ALG_TKIP) { | |
1606 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, | |
1607 | ktype, 1, key->key + 16, 16); | |
1608 | if (err) | |
1609 | goto out; | |
1610 | ||
1611 | /* | |
1612 | * hardware is not capable generating the MMIC | |
1613 | * for fragmented frames! | |
1614 | */ | |
1615 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
1616 | } | |
1617 | ||
1618 | if (i < 64) | |
1619 | ar->usedkeys |= BIT(i); | |
1620 | ||
1621 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
1622 | } else { | |
1623 | if (unlikely(!IS_STARTED(ar))) { | |
1624 | /* The device is gone... together with the key ;-) */ | |
1625 | err = 0; | |
1626 | goto out; | |
1627 | } | |
1628 | ||
1629 | err = ar9170_disable_key(ar, key->hw_key_idx); | |
1630 | if (err) | |
1631 | goto out; | |
1632 | ||
1633 | if (key->hw_key_idx < 64) { | |
1634 | ar->usedkeys &= ~BIT(key->hw_key_idx); | |
1635 | } else { | |
1636 | err = ar9170_upload_key(ar, key->hw_key_idx, NULL, | |
1637 | AR9170_ENC_ALG_NONE, 0, | |
1638 | NULL, 0); | |
1639 | if (err) | |
1640 | goto out; | |
1641 | ||
1642 | if (key->alg == ALG_TKIP) { | |
1643 | err = ar9170_upload_key(ar, key->hw_key_idx, | |
1644 | NULL, | |
1645 | AR9170_ENC_ALG_NONE, 1, | |
1646 | NULL, 0); | |
1647 | if (err) | |
1648 | goto out; | |
1649 | } | |
1650 | ||
1651 | } | |
1652 | } | |
1653 | ||
1654 | ar9170_regwrite_begin(ar); | |
1655 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys); | |
1656 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32); | |
1657 | ar9170_regwrite_finish(); | |
1658 | err = ar9170_regwrite_result(); | |
1659 | ||
1660 | out: | |
1661 | mutex_unlock(&ar->mutex); | |
1662 | ||
1663 | return err; | |
1664 | } | |
1665 | ||
1666 | static void ar9170_sta_notify(struct ieee80211_hw *hw, | |
1667 | struct ieee80211_vif *vif, | |
1668 | enum sta_notify_cmd cmd, | |
1669 | struct ieee80211_sta *sta) | |
1670 | { | |
1671 | struct ar9170 *ar = hw->priv; | |
1672 | struct ar9170_sta_info *info = (void *) sta->drv_priv; | |
1673 | struct sk_buff *skb; | |
4a48e2a4 | 1674 | unsigned int i; |
e9348cdd CL |
1675 | |
1676 | switch (cmd) { | |
1677 | case STA_NOTIFY_ADD: | |
4a48e2a4 CL |
1678 | for (i = 0; i < ar->hw->queues; i++) |
1679 | skb_queue_head_init(&info->tx_status[i]); | |
e9348cdd CL |
1680 | break; |
1681 | ||
1682 | case STA_NOTIFY_REMOVE: | |
1683 | ||
1684 | /* | |
1685 | * transfer all outstanding frames that need a tx_status | |
4a48e2a4 | 1686 | * reports to the global tx_status queue |
e9348cdd CL |
1687 | */ |
1688 | ||
4a48e2a4 CL |
1689 | for (i = 0; i < ar->hw->queues; i++) { |
1690 | while ((skb = skb_dequeue(&info->tx_status[i]))) { | |
e9348cdd | 1691 | #ifdef AR9170_QUEUE_DEBUG |
4a48e2a4 CL |
1692 | printk(KERN_DEBUG "%s: queueing frame in " |
1693 | "global tx_status queue =>\n", | |
1694 | wiphy_name(ar->hw->wiphy)); | |
e9348cdd | 1695 | |
4a48e2a4 | 1696 | ar9170_print_txheader(ar, skb); |
e9348cdd | 1697 | #endif /* AR9170_QUEUE_DEBUG */ |
4a48e2a4 CL |
1698 | skb_queue_tail(&ar->global_tx_status, skb); |
1699 | } | |
e9348cdd | 1700 | } |
4a48e2a4 CL |
1701 | queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor, |
1702 | msecs_to_jiffies(100)); | |
e9348cdd CL |
1703 | break; |
1704 | ||
1705 | default: | |
1706 | break; | |
1707 | } | |
1708 | } | |
1709 | ||
1710 | static int ar9170_get_stats(struct ieee80211_hw *hw, | |
1711 | struct ieee80211_low_level_stats *stats) | |
1712 | { | |
1713 | struct ar9170 *ar = hw->priv; | |
1714 | u32 val; | |
1715 | int err; | |
1716 | ||
1717 | mutex_lock(&ar->mutex); | |
1718 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val); | |
1719 | ar->stats.dot11ACKFailureCount += val; | |
1720 | ||
1721 | memcpy(stats, &ar->stats, sizeof(*stats)); | |
1722 | mutex_unlock(&ar->mutex); | |
1723 | ||
1724 | return 0; | |
1725 | } | |
1726 | ||
1727 | static int ar9170_get_tx_stats(struct ieee80211_hw *hw, | |
1728 | struct ieee80211_tx_queue_stats *tx_stats) | |
1729 | { | |
1730 | struct ar9170 *ar = hw->priv; | |
1731 | ||
1732 | spin_lock_bh(&ar->tx_stats_lock); | |
1733 | memcpy(tx_stats, ar->tx_stats, sizeof(tx_stats[0]) * hw->queues); | |
1734 | spin_unlock_bh(&ar->tx_stats_lock); | |
1735 | ||
1736 | return 0; | |
1737 | } | |
1738 | ||
1739 | static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue, | |
1740 | const struct ieee80211_tx_queue_params *param) | |
1741 | { | |
1742 | struct ar9170 *ar = hw->priv; | |
1743 | int ret; | |
1744 | ||
1745 | mutex_lock(&ar->mutex); | |
4a48e2a4 | 1746 | if ((param) && !(queue > ar->hw->queues)) { |
e9348cdd CL |
1747 | memcpy(&ar->edcf[ar9170_qos_hwmap[queue]], |
1748 | param, sizeof(*param)); | |
1749 | ||
1750 | ret = ar9170_set_qos(ar); | |
1751 | } else | |
1752 | ret = -EINVAL; | |
1753 | ||
1754 | mutex_unlock(&ar->mutex); | |
1755 | return ret; | |
1756 | } | |
1757 | ||
9e52b062 JB |
1758 | static int ar9170_ampdu_action(struct ieee80211_hw *hw, |
1759 | enum ieee80211_ampdu_mlme_action action, | |
1760 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) | |
1761 | { | |
1762 | switch (action) { | |
1763 | case IEEE80211_AMPDU_RX_START: | |
1764 | case IEEE80211_AMPDU_RX_STOP: | |
1765 | /* | |
1766 | * Something goes wrong -- RX locks up | |
1767 | * after a while of receiving aggregated | |
1768 | * frames -- not enabling for now. | |
1769 | */ | |
1770 | return -EOPNOTSUPP; | |
1771 | default: | |
1772 | return -EOPNOTSUPP; | |
1773 | } | |
1774 | } | |
1775 | ||
e9348cdd CL |
1776 | static const struct ieee80211_ops ar9170_ops = { |
1777 | .start = ar9170_op_start, | |
1778 | .stop = ar9170_op_stop, | |
1779 | .tx = ar9170_op_tx, | |
1780 | .add_interface = ar9170_op_add_interface, | |
1781 | .remove_interface = ar9170_op_remove_interface, | |
1782 | .config = ar9170_op_config, | |
e9348cdd CL |
1783 | .configure_filter = ar9170_op_configure_filter, |
1784 | .conf_tx = ar9170_conf_tx, | |
1785 | .bss_info_changed = ar9170_op_bss_info_changed, | |
1786 | .get_tsf = ar9170_op_get_tsf, | |
1787 | .set_key = ar9170_set_key, | |
1788 | .sta_notify = ar9170_sta_notify, | |
1789 | .get_stats = ar9170_get_stats, | |
1790 | .get_tx_stats = ar9170_get_tx_stats, | |
9e52b062 | 1791 | .ampdu_action = ar9170_ampdu_action, |
e9348cdd CL |
1792 | }; |
1793 | ||
1794 | void *ar9170_alloc(size_t priv_size) | |
1795 | { | |
1796 | struct ieee80211_hw *hw; | |
1797 | struct ar9170 *ar; | |
cca84799 | 1798 | struct sk_buff *skb; |
e9348cdd CL |
1799 | int i; |
1800 | ||
cca84799 CL |
1801 | /* |
1802 | * this buffer is used for rx stream reconstruction. | |
1803 | * Under heavy load this device (or the transport layer?) | |
1804 | * tends to split the streams into seperate rx descriptors. | |
1805 | */ | |
1806 | ||
1807 | skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL); | |
1808 | if (!skb) | |
1809 | goto err_nomem; | |
1810 | ||
e9348cdd CL |
1811 | hw = ieee80211_alloc_hw(priv_size, &ar9170_ops); |
1812 | if (!hw) | |
cca84799 | 1813 | goto err_nomem; |
e9348cdd CL |
1814 | |
1815 | ar = hw->priv; | |
1816 | ar->hw = hw; | |
cca84799 | 1817 | ar->rx_failover = skb; |
e9348cdd CL |
1818 | |
1819 | mutex_init(&ar->mutex); | |
1820 | spin_lock_init(&ar->cmdlock); | |
1821 | spin_lock_init(&ar->tx_stats_lock); | |
1822 | skb_queue_head_init(&ar->global_tx_status); | |
1823 | skb_queue_head_init(&ar->global_tx_status_waste); | |
cca84799 | 1824 | ar9170_rx_reset_rx_mpdu(ar); |
e9348cdd CL |
1825 | INIT_WORK(&ar->filter_config_work, ar9170_set_filters); |
1826 | INIT_WORK(&ar->beacon_work, ar9170_new_beacon); | |
1827 | INIT_DELAYED_WORK(&ar->tx_status_janitor, ar9170_tx_status_janitor); | |
1828 | ||
1829 | /* all hw supports 2.4 GHz, so set channel to 1 by default */ | |
1830 | ar->channel = &ar9170_2ghz_chantable[0]; | |
1831 | ||
1832 | /* first part of wiphy init */ | |
1833 | ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | | |
1834 | BIT(NL80211_IFTYPE_WDS) | | |
1835 | BIT(NL80211_IFTYPE_ADHOC); | |
1836 | ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS | | |
1837 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | | |
1838 | IEEE80211_HW_SIGNAL_DBM | | |
1839 | IEEE80211_HW_NOISE_DBM; | |
1840 | ||
4a48e2a4 | 1841 | ar->hw->queues = __AR9170_NUM_TXQ; |
e9348cdd CL |
1842 | ar->hw->extra_tx_headroom = 8; |
1843 | ar->hw->sta_data_size = sizeof(struct ar9170_sta_info); | |
1844 | ||
1845 | ar->hw->max_rates = 1; | |
1846 | ar->hw->max_rate_tries = 3; | |
1847 | ||
1848 | for (i = 0; i < ARRAY_SIZE(ar->noise); i++) | |
1849 | ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ | |
1850 | ||
1851 | return ar; | |
cca84799 CL |
1852 | |
1853 | err_nomem: | |
1854 | kfree_skb(skb); | |
1855 | return ERR_PTR(-ENOMEM); | |
e9348cdd | 1856 | } |
e9348cdd CL |
1857 | |
1858 | static int ar9170_read_eeprom(struct ar9170 *ar) | |
1859 | { | |
1860 | #define RW 8 /* number of words to read at once */ | |
1861 | #define RB (sizeof(u32) * RW) | |
1862 | DECLARE_MAC_BUF(mbuf); | |
1863 | u8 *eeprom = (void *)&ar->eeprom; | |
1864 | u8 *addr = ar->eeprom.mac_address; | |
1865 | __le32 offsets[RW]; | |
1866 | int i, j, err, bands = 0; | |
1867 | ||
1868 | BUILD_BUG_ON(sizeof(ar->eeprom) & 3); | |
1869 | ||
1870 | BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4); | |
1871 | #ifndef __CHECKER__ | |
1872 | /* don't want to handle trailing remains */ | |
1873 | BUILD_BUG_ON(sizeof(ar->eeprom) % RB); | |
1874 | #endif | |
1875 | ||
1876 | for (i = 0; i < sizeof(ar->eeprom)/RB; i++) { | |
1877 | for (j = 0; j < RW; j++) | |
1878 | offsets[j] = cpu_to_le32(AR9170_EEPROM_START + | |
1879 | RB * i + 4 * j); | |
1880 | ||
1881 | err = ar->exec_cmd(ar, AR9170_CMD_RREG, | |
1882 | RB, (u8 *) &offsets, | |
1883 | RB, eeprom + RB * i); | |
1884 | if (err) | |
1885 | return err; | |
1886 | } | |
1887 | ||
1888 | #undef RW | |
1889 | #undef RB | |
1890 | ||
1891 | if (ar->eeprom.length == cpu_to_le16(0xFFFF)) | |
1892 | return -ENODATA; | |
1893 | ||
1894 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { | |
1895 | ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz; | |
1896 | bands++; | |
1897 | } | |
1898 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { | |
1899 | ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz; | |
1900 | bands++; | |
1901 | } | |
1902 | /* | |
1903 | * I measured this, a bandswitch takes roughly | |
1904 | * 135 ms and a frequency switch about 80. | |
1905 | * | |
1906 | * FIXME: measure these values again once EEPROM settings | |
1907 | * are used, that will influence them! | |
1908 | */ | |
1909 | if (bands == 2) | |
1910 | ar->hw->channel_change_time = 135 * 1000; | |
1911 | else | |
1912 | ar->hw->channel_change_time = 80 * 1000; | |
1913 | ||
1878f77e CL |
1914 | ar->regulatory.current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); |
1915 | ar->regulatory.current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]); | |
1916 | ||
e9348cdd CL |
1917 | /* second part of wiphy init */ |
1918 | SET_IEEE80211_PERM_ADDR(ar->hw, addr); | |
1919 | ||
1920 | return bands ? 0 : -EINVAL; | |
1921 | } | |
1922 | ||
1878f77e CL |
1923 | static int ar9170_reg_notifier(struct wiphy *wiphy, |
1924 | struct regulatory_request *request) | |
1925 | { | |
1926 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); | |
1927 | struct ar9170 *ar = hw->priv; | |
1928 | ||
1929 | return ath_reg_notifier_apply(wiphy, request, &ar->regulatory); | |
1930 | } | |
1931 | ||
e9348cdd CL |
1932 | int ar9170_register(struct ar9170 *ar, struct device *pdev) |
1933 | { | |
1934 | int err; | |
1935 | ||
1936 | /* try to read EEPROM, init MAC addr */ | |
1937 | err = ar9170_read_eeprom(ar); | |
1938 | if (err) | |
1939 | goto err_out; | |
1940 | ||
1878f77e CL |
1941 | err = ath_regd_init(&ar->regulatory, ar->hw->wiphy, |
1942 | ar9170_reg_notifier); | |
85efc86e LR |
1943 | if (err) |
1944 | goto err_out; | |
1878f77e | 1945 | |
e9348cdd CL |
1946 | err = ieee80211_register_hw(ar->hw); |
1947 | if (err) | |
1948 | goto err_out; | |
1949 | ||
1878f77e CL |
1950 | if (!ath_is_world_regd(&ar->regulatory)) |
1951 | regulatory_hint(ar->hw->wiphy, ar->regulatory.alpha2); | |
1952 | ||
e9348cdd CL |
1953 | err = ar9170_init_leds(ar); |
1954 | if (err) | |
1955 | goto err_unreg; | |
1956 | ||
1957 | #ifdef CONFIG_AR9170_LEDS | |
1958 | err = ar9170_register_leds(ar); | |
1959 | if (err) | |
1960 | goto err_unreg; | |
1961 | #endif /* CONFIG_AR9170_LEDS */ | |
1962 | ||
1963 | dev_info(pdev, "Atheros AR9170 is registered as '%s'\n", | |
1964 | wiphy_name(ar->hw->wiphy)); | |
1965 | ||
1966 | return err; | |
1967 | ||
1968 | err_unreg: | |
1969 | ieee80211_unregister_hw(ar->hw); | |
1970 | ||
1971 | err_out: | |
1972 | return err; | |
1973 | } | |
e9348cdd CL |
1974 | |
1975 | void ar9170_unregister(struct ar9170 *ar) | |
1976 | { | |
1977 | #ifdef CONFIG_AR9170_LEDS | |
1978 | ar9170_unregister_leds(ar); | |
1979 | #endif /* CONFIG_AR9170_LEDS */ | |
1980 | ||
cca84799 | 1981 | kfree_skb(ar->rx_failover); |
e9348cdd CL |
1982 | ieee80211_unregister_hw(ar->hw); |
1983 | mutex_destroy(&ar->mutex); | |
1984 | } |