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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 | ||
176 | #ifdef AR9170_QUEUE_DEBUG | |
177 | /* | |
178 | * In case some wants works with AR9170's crazy tx_status queueing techniques. | |
179 | * He might need this rather useful probing function. | |
180 | * | |
181 | * NOTE: caller must hold the queue's spinlock! | |
182 | */ | |
183 | ||
184 | static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb) | |
185 | { | |
186 | struct ar9170_tx_control *txc = (void *) skb->data; | |
187 | struct ieee80211_hdr *hdr = (void *)txc->frame_data; | |
188 | ||
189 | printk(KERN_DEBUG "%s: => FRAME [skb:%p, queue:%d, DA:[%pM] " | |
190 | "mac_control:%04x, phy_control:%08x]\n", | |
191 | wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb), | |
192 | ieee80211_get_DA(hdr), le16_to_cpu(txc->mac_control), | |
193 | le32_to_cpu(txc->phy_control)); | |
194 | } | |
195 | ||
196 | static void ar9170_dump_station_tx_status_queue(struct ar9170 *ar, | |
197 | struct sk_buff_head *queue) | |
198 | { | |
199 | struct sk_buff *skb; | |
200 | int i = 0; | |
201 | ||
202 | printk(KERN_DEBUG "---[ cut here ]---\n"); | |
203 | printk(KERN_DEBUG "%s: %d entries in tx_status queue.\n", | |
204 | wiphy_name(ar->hw->wiphy), skb_queue_len(queue)); | |
205 | ||
206 | skb_queue_walk(queue, skb) { | |
207 | struct ar9170_tx_control *txc = (void *) skb->data; | |
208 | struct ieee80211_hdr *hdr = (void *)txc->frame_data; | |
209 | ||
210 | printk(KERN_DEBUG "index:%d => \n", i); | |
211 | ar9170_print_txheader(ar, skb); | |
212 | } | |
213 | printk(KERN_DEBUG "---[ end ]---\n"); | |
214 | } | |
215 | #endif /* AR9170_QUEUE_DEBUG */ | |
216 | ||
e9348cdd CL |
217 | void ar9170_handle_tx_status(struct ar9170 *ar, struct sk_buff *skb, |
218 | bool valid_status, u16 tx_status) | |
219 | { | |
220 | struct ieee80211_tx_info *txinfo; | |
221 | unsigned int retries = 0, queue = skb_get_queue_mapping(skb); | |
222 | unsigned long flags; | |
223 | ||
224 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
225 | ar->tx_stats[queue].len--; | |
226 | if (ieee80211_queue_stopped(ar->hw, queue)) | |
227 | ieee80211_wake_queue(ar->hw, queue); | |
228 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
229 | ||
230 | txinfo = IEEE80211_SKB_CB(skb); | |
231 | ieee80211_tx_info_clear_status(txinfo); | |
232 | ||
233 | switch (tx_status) { | |
234 | case AR9170_TX_STATUS_RETRY: | |
235 | retries = 2; | |
236 | case AR9170_TX_STATUS_COMPLETE: | |
237 | txinfo->flags |= IEEE80211_TX_STAT_ACK; | |
238 | break; | |
239 | ||
240 | case AR9170_TX_STATUS_FAILED: | |
241 | retries = ar->hw->conf.long_frame_max_tx_count; | |
242 | break; | |
243 | ||
244 | default: | |
245 | printk(KERN_ERR "%s: invalid tx_status response (%x).\n", | |
246 | wiphy_name(ar->hw->wiphy), tx_status); | |
247 | break; | |
248 | } | |
249 | ||
250 | if (valid_status) | |
251 | txinfo->status.rates[0].count = retries + 1; | |
252 | ||
253 | skb_pull(skb, sizeof(struct ar9170_tx_control)); | |
254 | ieee80211_tx_status_irqsafe(ar->hw, skb); | |
255 | } | |
e9348cdd CL |
256 | |
257 | static struct sk_buff *ar9170_find_skb_in_queue(struct ar9170 *ar, | |
258 | const u8 *mac, | |
259 | const u32 queue, | |
260 | struct sk_buff_head *q) | |
261 | { | |
262 | unsigned long flags; | |
263 | struct sk_buff *skb; | |
264 | ||
265 | spin_lock_irqsave(&q->lock, flags); | |
266 | skb_queue_walk(q, skb) { | |
267 | struct ar9170_tx_control *txc = (void *) skb->data; | |
268 | struct ieee80211_hdr *hdr = (void *) txc->frame_data; | |
269 | u32 txc_queue = (le32_to_cpu(txc->phy_control) & | |
270 | AR9170_TX_PHY_QOS_MASK) >> | |
271 | AR9170_TX_PHY_QOS_SHIFT; | |
272 | ||
273 | if ((queue != txc_queue) || | |
274 | (compare_ether_addr(ieee80211_get_DA(hdr), mac))) | |
275 | continue; | |
276 | ||
277 | __skb_unlink(skb, q); | |
278 | spin_unlock_irqrestore(&q->lock, flags); | |
279 | return skb; | |
280 | } | |
281 | spin_unlock_irqrestore(&q->lock, flags); | |
282 | return NULL; | |
283 | } | |
284 | ||
e9348cdd CL |
285 | static struct sk_buff *ar9170_find_queued_skb(struct ar9170 *ar, const u8 *mac, |
286 | const u32 queue) | |
287 | { | |
288 | struct ieee80211_sta *sta; | |
289 | struct sk_buff *skb; | |
290 | ||
291 | /* | |
292 | * Unfortunately, the firmware does not tell to which (queued) frame | |
293 | * this transmission status report belongs to. | |
294 | * | |
295 | * So we have to make risky guesses - with the scarce information | |
296 | * the firmware provided (-> destination MAC, and phy_control) - | |
297 | * and hope that we picked the right one... | |
298 | */ | |
299 | rcu_read_lock(); | |
300 | sta = ieee80211_find_sta(ar->hw, mac); | |
301 | ||
302 | if (likely(sta)) { | |
303 | struct ar9170_sta_info *sta_priv = (void *) sta->drv_priv; | |
4a48e2a4 CL |
304 | skb = skb_dequeue(&sta_priv->tx_status[queue]); |
305 | rcu_read_unlock(); | |
306 | if (likely(skb)) | |
307 | return skb; | |
308 | } else | |
309 | rcu_read_unlock(); | |
e9348cdd | 310 | |
4a48e2a4 CL |
311 | /* scan the waste queue for candidates */ |
312 | skb = ar9170_find_skb_in_queue(ar, mac, queue, | |
313 | &ar->global_tx_status_waste); | |
314 | if (!skb) { | |
315 | /* so it still _must_ be in the global list. */ | |
e9348cdd | 316 | skb = ar9170_find_skb_in_queue(ar, mac, queue, |
4a48e2a4 | 317 | &ar->global_tx_status); |
e9348cdd | 318 | } |
e9348cdd CL |
319 | |
320 | #ifdef AR9170_QUEUE_DEBUG | |
321 | if (unlikely((!skb) && net_ratelimit())) { | |
322 | printk(KERN_ERR "%s: ESS:[%pM] does not have any " | |
323 | "outstanding frames in this queue (%d).\n", | |
324 | wiphy_name(ar->hw->wiphy), mac, queue); | |
325 | } | |
326 | #endif /* AR9170_QUEUE_DEBUG */ | |
e9348cdd CL |
327 | return skb; |
328 | } | |
329 | ||
330 | /* | |
331 | * This worker tries to keep the global tx_status queue empty. | |
332 | * So we can guarantee that incoming tx_status reports for | |
333 | * unregistered stations are always synced with the actual | |
334 | * frame - which we think - belongs to. | |
335 | */ | |
336 | ||
337 | static void ar9170_tx_status_janitor(struct work_struct *work) | |
338 | { | |
339 | struct ar9170 *ar = container_of(work, struct ar9170, | |
4a48e2a4 | 340 | tx_status_janitor.work); |
e9348cdd CL |
341 | struct sk_buff *skb; |
342 | ||
4a48e2a4 CL |
343 | if (unlikely(!IS_STARTED(ar))) |
344 | return ; | |
345 | ||
e9348cdd CL |
346 | /* recycle the garbage back to mac80211... one by one. */ |
347 | while ((skb = skb_dequeue(&ar->global_tx_status_waste))) { | |
348 | #ifdef AR9170_QUEUE_DEBUG | |
349 | printk(KERN_DEBUG "%s: dispose queued frame =>\n", | |
350 | wiphy_name(ar->hw->wiphy)); | |
351 | ar9170_print_txheader(ar, skb); | |
352 | #endif /* AR9170_QUEUE_DEBUG */ | |
353 | ar9170_handle_tx_status(ar, skb, false, | |
354 | AR9170_TX_STATUS_FAILED); | |
355 | } | |
356 | ||
e9348cdd CL |
357 | while ((skb = skb_dequeue(&ar->global_tx_status))) { |
358 | #ifdef AR9170_QUEUE_DEBUG | |
359 | printk(KERN_DEBUG "%s: moving frame into waste queue =>\n", | |
360 | wiphy_name(ar->hw->wiphy)); | |
361 | ||
362 | ar9170_print_txheader(ar, skb); | |
363 | #endif /* AR9170_QUEUE_DEBUG */ | |
364 | skb_queue_tail(&ar->global_tx_status_waste, skb); | |
365 | } | |
366 | ||
367 | /* recall the janitor in 100ms - if there's garbage in the can. */ | |
368 | if (skb_queue_len(&ar->global_tx_status_waste) > 0) | |
369 | queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor, | |
370 | msecs_to_jiffies(100)); | |
371 | } | |
372 | ||
66d00813 | 373 | void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len) |
e9348cdd CL |
374 | { |
375 | struct ar9170_cmd_response *cmd = (void *) buf; | |
376 | ||
377 | if ((cmd->type & 0xc0) != 0xc0) { | |
378 | ar->callback_cmd(ar, len, buf); | |
379 | return; | |
380 | } | |
381 | ||
382 | /* hardware event handlers */ | |
383 | switch (cmd->type) { | |
384 | case 0xc1: { | |
385 | /* | |
386 | * TX status notification: | |
387 | * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1 | |
388 | * | |
389 | * XX always 81 | |
390 | * YY always 00 | |
391 | * M1-M6 is the MAC address | |
392 | * R1-R4 is the transmit rate | |
393 | * S1-S2 is the transmit status | |
394 | */ | |
395 | ||
396 | struct sk_buff *skb; | |
397 | u32 queue = (le32_to_cpu(cmd->tx_status.rate) & | |
398 | AR9170_TX_PHY_QOS_MASK) >> AR9170_TX_PHY_QOS_SHIFT; | |
399 | ||
400 | skb = ar9170_find_queued_skb(ar, cmd->tx_status.dst, queue); | |
401 | if (unlikely(!skb)) | |
402 | return ; | |
403 | ||
404 | ar9170_handle_tx_status(ar, skb, true, | |
405 | le16_to_cpu(cmd->tx_status.status)); | |
406 | break; | |
407 | } | |
408 | ||
409 | case 0xc0: | |
410 | /* | |
411 | * pre-TBTT event | |
412 | */ | |
413 | if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP) | |
414 | queue_work(ar->hw->workqueue, &ar->beacon_work); | |
415 | break; | |
416 | ||
417 | case 0xc2: | |
418 | /* | |
419 | * (IBSS) beacon send notification | |
420 | * bytes: 04 c2 XX YY B4 B3 B2 B1 | |
421 | * | |
422 | * XX always 80 | |
423 | * YY always 00 | |
424 | * B1-B4 "should" be the number of send out beacons. | |
425 | */ | |
426 | break; | |
427 | ||
428 | case 0xc3: | |
429 | /* End of Atim Window */ | |
430 | break; | |
431 | ||
432 | case 0xc4: | |
433 | case 0xc5: | |
434 | /* BlockACK events */ | |
435 | break; | |
436 | ||
437 | case 0xc6: | |
438 | /* Watchdog Interrupt */ | |
439 | break; | |
440 | ||
441 | case 0xc9: | |
442 | /* retransmission issue / SIFS/EIFS collision ?! */ | |
443 | break; | |
444 | ||
445 | default: | |
446 | printk(KERN_INFO "received unhandled event %x\n", cmd->type); | |
447 | print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len); | |
448 | break; | |
449 | } | |
450 | } | |
451 | ||
cca84799 | 452 | static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar) |
e9348cdd | 453 | { |
cca84799 CL |
454 | memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head)); |
455 | ar->rx_mpdu.has_plcp = false; | |
456 | } | |
e9348cdd | 457 | |
cca84799 CL |
458 | static int ar9170_nag_limiter(struct ar9170 *ar) |
459 | { | |
460 | bool print_message; | |
461 | ||
462 | /* | |
463 | * we expect all sorts of errors in promiscuous mode. | |
464 | * don't bother with it, it's OK! | |
465 | */ | |
466 | if (ar->sniffer_enabled) | |
467 | return false; | |
468 | ||
469 | /* | |
470 | * only go for frequent errors! The hardware tends to | |
471 | * do some stupid thing once in a while under load, in | |
472 | * noisy environments or just for fun! | |
473 | */ | |
474 | if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit()) | |
475 | print_message = true; | |
476 | else | |
477 | print_message = false; | |
478 | ||
479 | /* reset threshold for "once in a while" */ | |
480 | ar->bad_hw_nagger = jiffies + HZ / 4; | |
481 | return print_message; | |
482 | } | |
483 | ||
484 | static int ar9170_rx_mac_status(struct ar9170 *ar, | |
485 | struct ar9170_rx_head *head, | |
486 | struct ar9170_rx_macstatus *mac, | |
487 | struct ieee80211_rx_status *status) | |
488 | { | |
489 | u8 error, decrypt; | |
e9348cdd | 490 | |
e9348cdd | 491 | BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12); |
cca84799 | 492 | BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4); |
e9348cdd | 493 | |
cca84799 CL |
494 | error = mac->error; |
495 | if (error & AR9170_RX_ERROR_MMIC) { | |
496 | status->flag |= RX_FLAG_MMIC_ERROR; | |
497 | error &= ~AR9170_RX_ERROR_MMIC; | |
498 | } | |
e9348cdd | 499 | |
cca84799 CL |
500 | if (error & AR9170_RX_ERROR_PLCP) { |
501 | status->flag |= RX_FLAG_FAILED_PLCP_CRC; | |
502 | error &= ~AR9170_RX_ERROR_PLCP; | |
e9348cdd | 503 | |
cca84799 CL |
504 | if (!(ar->filter_state & FIF_PLCPFAIL)) |
505 | return -EINVAL; | |
506 | } | |
e9348cdd | 507 | |
cca84799 CL |
508 | if (error & AR9170_RX_ERROR_FCS) { |
509 | status->flag |= RX_FLAG_FAILED_FCS_CRC; | |
510 | error &= ~AR9170_RX_ERROR_FCS; | |
e9348cdd | 511 | |
cca84799 CL |
512 | if (!(ar->filter_state & FIF_FCSFAIL)) |
513 | return -EINVAL; | |
514 | } | |
515 | ||
516 | decrypt = ar9170_get_decrypt_type(mac); | |
517 | if (!(decrypt & AR9170_RX_ENC_SOFTWARE) && | |
518 | decrypt != AR9170_ENC_ALG_NONE) | |
519 | status->flag |= RX_FLAG_DECRYPTED; | |
e9348cdd | 520 | |
cca84799 CL |
521 | /* ignore wrong RA errors */ |
522 | error &= ~AR9170_RX_ERROR_WRONG_RA; | |
e9348cdd | 523 | |
cca84799 CL |
524 | if (error & AR9170_RX_ERROR_DECRYPT) { |
525 | error &= ~AR9170_RX_ERROR_DECRYPT; | |
526 | /* | |
527 | * Rx decryption is done in place, | |
528 | * the original data is lost anyway. | |
529 | */ | |
530 | ||
531 | return -EINVAL; | |
532 | } | |
533 | ||
534 | /* drop any other error frames */ | |
535 | if (unlikely(error)) { | |
536 | /* TODO: update netdevice's RX dropped/errors statistics */ | |
537 | ||
538 | if (ar9170_nag_limiter(ar)) | |
539 | printk(KERN_DEBUG "%s: received frame with " | |
540 | "suspicious error code (%#x).\n", | |
541 | wiphy_name(ar->hw->wiphy), error); | |
542 | ||
543 | return -EINVAL; | |
544 | } | |
545 | ||
546 | status->band = ar->channel->band; | |
547 | status->freq = ar->channel->center_freq; | |
548 | ||
549 | switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) { | |
e9348cdd | 550 | case AR9170_RX_STATUS_MODULATION_CCK: |
cca84799 CL |
551 | if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE) |
552 | status->flag |= RX_FLAG_SHORTPRE; | |
e9348cdd CL |
553 | switch (head->plcp[0]) { |
554 | case 0x0a: | |
cca84799 | 555 | status->rate_idx = 0; |
e9348cdd CL |
556 | break; |
557 | case 0x14: | |
cca84799 | 558 | status->rate_idx = 1; |
e9348cdd CL |
559 | break; |
560 | case 0x37: | |
cca84799 | 561 | status->rate_idx = 2; |
e9348cdd CL |
562 | break; |
563 | case 0x6e: | |
cca84799 | 564 | status->rate_idx = 3; |
e9348cdd CL |
565 | break; |
566 | default: | |
cca84799 | 567 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
568 | printk(KERN_ERR "%s: invalid plcp cck rate " |
569 | "(%x).\n", wiphy_name(ar->hw->wiphy), | |
570 | head->plcp[0]); | |
cca84799 | 571 | return -EINVAL; |
e9348cdd CL |
572 | } |
573 | break; | |
cca84799 | 574 | |
e9348cdd | 575 | case AR9170_RX_STATUS_MODULATION_OFDM: |
cca84799 CL |
576 | switch (head->plcp[0] & 0xf) { |
577 | case 0xb: | |
578 | status->rate_idx = 0; | |
e9348cdd | 579 | break; |
cca84799 CL |
580 | case 0xf: |
581 | status->rate_idx = 1; | |
e9348cdd | 582 | break; |
cca84799 CL |
583 | case 0xa: |
584 | status->rate_idx = 2; | |
e9348cdd | 585 | break; |
cca84799 CL |
586 | case 0xe: |
587 | status->rate_idx = 3; | |
e9348cdd CL |
588 | break; |
589 | case 0x9: | |
cca84799 | 590 | status->rate_idx = 4; |
e9348cdd | 591 | break; |
cca84799 CL |
592 | case 0xd: |
593 | status->rate_idx = 5; | |
e9348cdd CL |
594 | break; |
595 | case 0x8: | |
cca84799 | 596 | status->rate_idx = 6; |
e9348cdd | 597 | break; |
cca84799 CL |
598 | case 0xc: |
599 | status->rate_idx = 7; | |
e9348cdd CL |
600 | break; |
601 | default: | |
cca84799 | 602 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
603 | printk(KERN_ERR "%s: invalid plcp ofdm rate " |
604 | "(%x).\n", wiphy_name(ar->hw->wiphy), | |
605 | head->plcp[0]); | |
cca84799 | 606 | return -EINVAL; |
e9348cdd | 607 | } |
cca84799 CL |
608 | if (status->band == IEEE80211_BAND_2GHZ) |
609 | status->rate_idx += 4; | |
e9348cdd | 610 | break; |
cca84799 | 611 | |
e9348cdd | 612 | case AR9170_RX_STATUS_MODULATION_HT: |
cca84799 CL |
613 | if (head->plcp[3] & 0x80) |
614 | status->flag |= RX_FLAG_40MHZ; | |
615 | if (head->plcp[6] & 0x80) | |
616 | status->flag |= RX_FLAG_SHORT_GI; | |
617 | ||
618 | status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f); | |
619 | status->flag |= RX_FLAG_HT; | |
620 | break; | |
621 | ||
e9348cdd CL |
622 | case AR9170_RX_STATUS_MODULATION_DUPOFDM: |
623 | /* XXX */ | |
cca84799 | 624 | if (ar9170_nag_limiter(ar)) |
e9348cdd CL |
625 | printk(KERN_ERR "%s: invalid modulation\n", |
626 | wiphy_name(ar->hw->wiphy)); | |
cca84799 | 627 | return -EINVAL; |
e9348cdd CL |
628 | } |
629 | ||
cca84799 CL |
630 | return 0; |
631 | } | |
e9348cdd | 632 | |
cca84799 CL |
633 | static void ar9170_rx_phy_status(struct ar9170 *ar, |
634 | struct ar9170_rx_phystatus *phy, | |
635 | struct ieee80211_rx_status *status) | |
636 | { | |
637 | int i; | |
e9348cdd | 638 | |
cca84799 CL |
639 | BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20); |
640 | ||
641 | for (i = 0; i < 3; i++) | |
642 | if (phy->rssi[i] != 0x80) | |
643 | status->antenna |= BIT(i); | |
644 | ||
645 | /* post-process RSSI */ | |
646 | for (i = 0; i < 7; i++) | |
647 | if (phy->rssi[i] & 0x80) | |
648 | phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f; | |
649 | ||
650 | /* TODO: we could do something with phy_errors */ | |
651 | status->signal = ar->noise[0] + phy->rssi_combined; | |
652 | status->noise = ar->noise[0]; | |
653 | } | |
654 | ||
655 | static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len) | |
656 | { | |
657 | struct sk_buff *skb; | |
658 | int reserved = 0; | |
659 | struct ieee80211_hdr *hdr = (void *) buf; | |
660 | ||
661 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
662 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
663 | reserved += NET_IP_ALIGN; | |
664 | ||
665 | if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) | |
666 | reserved += NET_IP_ALIGN; | |
e9348cdd CL |
667 | } |
668 | ||
cca84799 CL |
669 | if (ieee80211_has_a4(hdr->frame_control)) |
670 | reserved += NET_IP_ALIGN; | |
671 | ||
672 | reserved = 32 + (reserved & NET_IP_ALIGN); | |
673 | ||
674 | skb = dev_alloc_skb(len + reserved); | |
675 | if (likely(skb)) { | |
676 | skb_reserve(skb, reserved); | |
677 | memcpy(skb_put(skb, len), buf, len); | |
e9348cdd CL |
678 | } |
679 | ||
cca84799 CL |
680 | return skb; |
681 | } | |
e9348cdd | 682 | |
cca84799 CL |
683 | /* |
684 | * If the frame alignment is right (or the kernel has | |
685 | * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there | |
686 | * is only a single MPDU in the USB frame, then we could | |
687 | * submit to mac80211 the SKB directly. However, since | |
688 | * there may be multiple packets in one SKB in stream | |
689 | * mode, and we need to observe the proper ordering, | |
690 | * this is non-trivial. | |
691 | */ | |
e9348cdd | 692 | |
cca84799 CL |
693 | static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) |
694 | { | |
695 | struct ar9170_rx_head *head; | |
696 | struct ar9170_rx_macstatus *mac; | |
697 | struct ar9170_rx_phystatus *phy = NULL; | |
698 | struct ieee80211_rx_status status; | |
699 | struct sk_buff *skb; | |
700 | int mpdu_len; | |
701 | ||
702 | if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac)))) | |
703 | return ; | |
704 | ||
705 | /* Received MPDU */ | |
706 | mpdu_len = len - sizeof(*mac); | |
707 | ||
708 | mac = (void *)(buf + mpdu_len); | |
709 | if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) { | |
710 | /* this frame is too damaged and can't be used - drop it */ | |
e9348cdd | 711 | |
e9348cdd CL |
712 | return ; |
713 | } | |
714 | ||
cca84799 CL |
715 | switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) { |
716 | case AR9170_RX_STATUS_MPDU_FIRST: | |
717 | /* first mpdu packet has the plcp header */ | |
718 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) { | |
719 | head = (void *) buf; | |
720 | memcpy(&ar->rx_mpdu.plcp, (void *) buf, | |
721 | sizeof(struct ar9170_rx_head)); | |
722 | ||
723 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
724 | buf += sizeof(struct ar9170_rx_head); | |
725 | ar->rx_mpdu.has_plcp = true; | |
726 | } else { | |
727 | if (ar9170_nag_limiter(ar)) | |
728 | printk(KERN_ERR "%s: plcp info is clipped.\n", | |
729 | wiphy_name(ar->hw->wiphy)); | |
730 | return ; | |
731 | } | |
732 | break; | |
733 | ||
734 | case AR9170_RX_STATUS_MPDU_LAST: | |
735 | /* last mpdu has a extra tail with phy status information */ | |
736 | ||
737 | if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) { | |
738 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
739 | phy = (void *)(buf + mpdu_len); | |
740 | } else { | |
741 | if (ar9170_nag_limiter(ar)) | |
742 | printk(KERN_ERR "%s: frame tail is clipped.\n", | |
743 | wiphy_name(ar->hw->wiphy)); | |
744 | return ; | |
745 | } | |
746 | ||
747 | case AR9170_RX_STATUS_MPDU_MIDDLE: | |
748 | /* middle mpdus are just data */ | |
749 | if (unlikely(!ar->rx_mpdu.has_plcp)) { | |
750 | if (!ar9170_nag_limiter(ar)) | |
751 | return ; | |
752 | ||
753 | printk(KERN_ERR "%s: rx stream did not start " | |
754 | "with a first_mpdu frame tag.\n", | |
755 | wiphy_name(ar->hw->wiphy)); | |
756 | ||
757 | return ; | |
758 | } | |
759 | ||
760 | head = &ar->rx_mpdu.plcp; | |
761 | break; | |
762 | ||
763 | case AR9170_RX_STATUS_MPDU_SINGLE: | |
764 | /* single mpdu - has plcp (head) and phy status (tail) */ | |
765 | head = (void *) buf; | |
766 | ||
767 | mpdu_len -= sizeof(struct ar9170_rx_head); | |
768 | mpdu_len -= sizeof(struct ar9170_rx_phystatus); | |
769 | ||
770 | buf += sizeof(struct ar9170_rx_head); | |
771 | phy = (void *)(buf + mpdu_len); | |
772 | break; | |
773 | ||
774 | default: | |
775 | BUG_ON(1); | |
776 | break; | |
e9348cdd CL |
777 | } |
778 | ||
cca84799 CL |
779 | if (unlikely(mpdu_len < FCS_LEN)) |
780 | return ; | |
e9348cdd | 781 | |
cca84799 CL |
782 | memset(&status, 0, sizeof(status)); |
783 | if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status))) | |
784 | return ; | |
e9348cdd | 785 | |
cca84799 CL |
786 | if (phy) |
787 | ar9170_rx_phy_status(ar, phy, &status); | |
e9348cdd | 788 | |
cca84799 CL |
789 | skb = ar9170_rx_copy_data(buf, mpdu_len); |
790 | if (likely(skb)) | |
791 | ieee80211_rx_irqsafe(ar->hw, skb, &status); | |
e9348cdd CL |
792 | } |
793 | ||
e9348cdd CL |
794 | void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb) |
795 | { | |
cca84799 | 796 | unsigned int i, tlen, resplen, wlen = 0, clen = 0; |
e9348cdd CL |
797 | u8 *tbuf, *respbuf; |
798 | ||
799 | tbuf = skb->data; | |
800 | tlen = skb->len; | |
801 | ||
802 | while (tlen >= 4) { | |
cca84799 CL |
803 | clen = tbuf[1] << 8 | tbuf[0]; |
804 | wlen = ALIGN(clen, 4); | |
e9348cdd | 805 | |
cca84799 | 806 | /* check if this is stream has a valid tag.*/ |
e9348cdd | 807 | if (tbuf[2] != 0 || tbuf[3] != 0x4e) { |
cca84799 CL |
808 | /* |
809 | * TODO: handle the highly unlikely event that the | |
810 | * corrupted stream has the TAG at the right position. | |
811 | */ | |
812 | ||
813 | /* check if the frame can be repaired. */ | |
814 | if (!ar->rx_failover_missing) { | |
815 | /* this is no "short read". */ | |
816 | if (ar9170_nag_limiter(ar)) { | |
817 | printk(KERN_ERR "%s: missing tag!\n", | |
818 | wiphy_name(ar->hw->wiphy)); | |
819 | goto err_telluser; | |
820 | } else | |
821 | goto err_silent; | |
822 | } | |
823 | ||
824 | if (ar->rx_failover_missing > tlen) { | |
825 | if (ar9170_nag_limiter(ar)) { | |
826 | printk(KERN_ERR "%s: possible multi " | |
827 | "stream corruption!\n", | |
828 | wiphy_name(ar->hw->wiphy)); | |
829 | goto err_telluser; | |
830 | } else | |
831 | goto err_silent; | |
832 | } | |
833 | ||
834 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
835 | ar->rx_failover_missing -= tlen; | |
836 | ||
837 | if (ar->rx_failover_missing <= 0) { | |
838 | /* | |
839 | * nested ar9170_rx call! | |
840 | * termination is guranteed, even when the | |
841 | * combined frame also have a element with | |
842 | * a bad tag. | |
843 | */ | |
844 | ||
845 | ar->rx_failover_missing = 0; | |
846 | ar9170_rx(ar, ar->rx_failover); | |
847 | ||
848 | skb_reset_tail_pointer(ar->rx_failover); | |
849 | skb_trim(ar->rx_failover, 0); | |
850 | } | |
851 | ||
e9348cdd CL |
852 | return ; |
853 | } | |
cca84799 CL |
854 | |
855 | /* check if stream is clipped */ | |
e9348cdd | 856 | if (wlen > tlen - 4) { |
cca84799 CL |
857 | if (ar->rx_failover_missing) { |
858 | /* TODO: handle double stream corruption. */ | |
859 | if (ar9170_nag_limiter(ar)) { | |
860 | printk(KERN_ERR "%s: double rx stream " | |
861 | "corruption!\n", | |
862 | wiphy_name(ar->hw->wiphy)); | |
863 | goto err_telluser; | |
864 | } else | |
865 | goto err_silent; | |
866 | } | |
867 | ||
868 | /* | |
869 | * save incomplete data set. | |
870 | * the firmware will resend the missing bits when | |
871 | * the rx - descriptor comes round again. | |
872 | */ | |
873 | ||
874 | memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen); | |
875 | ar->rx_failover_missing = clen - tlen; | |
e9348cdd CL |
876 | return ; |
877 | } | |
878 | resplen = clen; | |
879 | respbuf = tbuf + 4; | |
880 | tbuf += wlen + 4; | |
881 | tlen -= wlen + 4; | |
882 | ||
883 | i = 0; | |
884 | ||
885 | /* weird thing, but this is the same in the original driver */ | |
886 | while (resplen > 2 && i < 12 && | |
887 | respbuf[0] == 0xff && respbuf[1] == 0xff) { | |
888 | i += 2; | |
889 | resplen -= 2; | |
890 | respbuf += 2; | |
891 | } | |
892 | ||
893 | if (resplen < 4) | |
894 | continue; | |
895 | ||
896 | /* found the 6 * 0xffff marker? */ | |
897 | if (i == 12) | |
898 | ar9170_handle_command_response(ar, respbuf, resplen); | |
899 | else | |
cca84799 | 900 | ar9170_handle_mpdu(ar, respbuf, clen); |
e9348cdd CL |
901 | } |
902 | ||
cca84799 CL |
903 | if (tlen) { |
904 | if (net_ratelimit()) | |
905 | printk(KERN_ERR "%s: %d bytes of unprocessed " | |
906 | "data left in rx stream!\n", | |
907 | wiphy_name(ar->hw->wiphy), tlen); | |
908 | ||
909 | goto err_telluser; | |
910 | } | |
911 | ||
912 | return ; | |
913 | ||
914 | err_telluser: | |
915 | printk(KERN_ERR "%s: damaged RX stream data [want:%d, " | |
916 | "data:%d, rx:%d, pending:%d ]\n", | |
917 | wiphy_name(ar->hw->wiphy), clen, wlen, tlen, | |
918 | ar->rx_failover_missing); | |
919 | ||
920 | if (ar->rx_failover_missing) | |
921 | print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET, | |
922 | ar->rx_failover->data, | |
923 | ar->rx_failover->len); | |
924 | ||
925 | print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET, | |
926 | skb->data, skb->len); | |
927 | ||
928 | printk(KERN_ERR "%s: please check your hardware and cables, if " | |
929 | "you see this message frequently.\n", | |
930 | wiphy_name(ar->hw->wiphy)); | |
931 | ||
932 | err_silent: | |
933 | if (ar->rx_failover_missing) { | |
934 | skb_reset_tail_pointer(ar->rx_failover); | |
935 | skb_trim(ar->rx_failover, 0); | |
936 | ar->rx_failover_missing = 0; | |
937 | } | |
e9348cdd | 938 | } |
e9348cdd CL |
939 | |
940 | #define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \ | |
941 | do { \ | |
942 | queue.aifs = ai_fs; \ | |
943 | queue.cw_min = cwmin; \ | |
944 | queue.cw_max = cwmax; \ | |
945 | queue.txop = _txop; \ | |
946 | } while (0) | |
947 | ||
948 | static int ar9170_op_start(struct ieee80211_hw *hw) | |
949 | { | |
950 | struct ar9170 *ar = hw->priv; | |
951 | int err, i; | |
952 | ||
953 | mutex_lock(&ar->mutex); | |
954 | ||
864cc02e CL |
955 | ar->filter_changed = 0; |
956 | ||
e9348cdd CL |
957 | /* reinitialize queues statistics */ |
958 | memset(&ar->tx_stats, 0, sizeof(ar->tx_stats)); | |
959 | for (i = 0; i < ARRAY_SIZE(ar->tx_stats); i++) | |
960 | ar->tx_stats[i].limit = 8; | |
961 | ||
962 | /* reset QoS defaults */ | |
963 | AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/ | |
964 | AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */ | |
965 | AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */ | |
966 | AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */ | |
967 | AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */ | |
968 | ||
cca84799 CL |
969 | ar->bad_hw_nagger = jiffies; |
970 | ||
e9348cdd CL |
971 | err = ar->open(ar); |
972 | if (err) | |
973 | goto out; | |
974 | ||
975 | err = ar9170_init_mac(ar); | |
976 | if (err) | |
977 | goto out; | |
978 | ||
979 | err = ar9170_set_qos(ar); | |
980 | if (err) | |
981 | goto out; | |
982 | ||
983 | err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ); | |
984 | if (err) | |
985 | goto out; | |
986 | ||
987 | err = ar9170_init_rf(ar); | |
988 | if (err) | |
989 | goto out; | |
990 | ||
991 | /* start DMA */ | |
992 | err = ar9170_write_reg(ar, 0x1c3d30, 0x100); | |
993 | if (err) | |
994 | goto out; | |
995 | ||
996 | ar->state = AR9170_STARTED; | |
997 | ||
998 | out: | |
999 | mutex_unlock(&ar->mutex); | |
1000 | return err; | |
1001 | } | |
1002 | ||
1003 | static void ar9170_op_stop(struct ieee80211_hw *hw) | |
1004 | { | |
1005 | struct ar9170 *ar = hw->priv; | |
1006 | ||
1007 | if (IS_STARTED(ar)) | |
1008 | ar->state = AR9170_IDLE; | |
1009 | ||
32c1628f | 1010 | flush_workqueue(ar->hw->workqueue); |
e9348cdd CL |
1011 | |
1012 | cancel_delayed_work_sync(&ar->tx_status_janitor); | |
1013 | cancel_work_sync(&ar->filter_config_work); | |
1014 | cancel_work_sync(&ar->beacon_work); | |
b55d6bcf | 1015 | mutex_lock(&ar->mutex); |
e9348cdd CL |
1016 | skb_queue_purge(&ar->global_tx_status_waste); |
1017 | skb_queue_purge(&ar->global_tx_status); | |
1018 | ||
1019 | if (IS_ACCEPTING_CMD(ar)) { | |
1020 | ar9170_set_leds_state(ar, 0); | |
1021 | ||
1022 | /* stop DMA */ | |
1023 | ar9170_write_reg(ar, 0x1c3d30, 0); | |
1024 | ar->stop(ar); | |
1025 | } | |
1026 | ||
1027 | mutex_unlock(&ar->mutex); | |
1028 | } | |
1029 | ||
1030 | int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) | |
1031 | { | |
1032 | struct ar9170 *ar = hw->priv; | |
1033 | struct ieee80211_hdr *hdr; | |
1034 | struct ar9170_tx_control *txc; | |
1035 | struct ieee80211_tx_info *info; | |
1036 | struct ieee80211_rate *rate = NULL; | |
1037 | struct ieee80211_tx_rate *txrate; | |
1038 | unsigned int queue = skb_get_queue_mapping(skb); | |
1039 | unsigned long flags = 0; | |
1040 | struct ar9170_sta_info *sta_info = NULL; | |
1041 | u32 power, chains; | |
1042 | u16 keytype = 0; | |
1043 | u16 len, icv = 0; | |
1044 | int err; | |
1045 | bool tx_status; | |
1046 | ||
1047 | if (unlikely(!IS_STARTED(ar))) | |
1048 | goto err_free; | |
1049 | ||
1050 | hdr = (void *)skb->data; | |
1051 | info = IEEE80211_SKB_CB(skb); | |
1052 | len = skb->len; | |
1053 | ||
1054 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1055 | if (ar->tx_stats[queue].limit < ar->tx_stats[queue].len) { | |
1056 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1057 | return NETDEV_TX_OK; | |
1058 | } | |
1059 | ||
1060 | ar->tx_stats[queue].len++; | |
1061 | ar->tx_stats[queue].count++; | |
1062 | if (ar->tx_stats[queue].limit == ar->tx_stats[queue].len) | |
1063 | ieee80211_stop_queue(hw, queue); | |
1064 | ||
1065 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1066 | ||
1067 | txc = (void *)skb_push(skb, sizeof(*txc)); | |
1068 | ||
1069 | tx_status = (((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) != 0) || | |
1070 | ((info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) != 0)); | |
1071 | ||
1072 | if (info->control.hw_key) { | |
1073 | icv = info->control.hw_key->icv_len; | |
1074 | ||
1075 | switch (info->control.hw_key->alg) { | |
1076 | case ALG_WEP: | |
1077 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1078 | break; | |
1079 | case ALG_TKIP: | |
1080 | keytype = AR9170_TX_MAC_ENCR_RC4; | |
1081 | break; | |
1082 | case ALG_CCMP: | |
1083 | keytype = AR9170_TX_MAC_ENCR_AES; | |
1084 | break; | |
1085 | default: | |
1086 | WARN_ON(1); | |
1087 | goto err_dequeue; | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | /* Length */ | |
1092 | txc->length = cpu_to_le16(len + icv + 4); | |
1093 | ||
1094 | txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION | | |
1095 | AR9170_TX_MAC_BACKOFF); | |
1096 | txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] << | |
1097 | AR9170_TX_MAC_QOS_SHIFT); | |
1098 | txc->mac_control |= cpu_to_le16(keytype); | |
1099 | txc->phy_control = cpu_to_le32(0); | |
1100 | ||
1101 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1102 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK); | |
1103 | ||
1104 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
1105 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR); | |
1106 | ||
1107 | txrate = &info->control.rates[0]; | |
1108 | ||
1109 | if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) | |
1110 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS); | |
1111 | else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS) | |
1112 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS); | |
1113 | ||
1114 | if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD) | |
1115 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD); | |
1116 | ||
1117 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) | |
1118 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE); | |
1119 | ||
1120 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
1121 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ); | |
1122 | /* this works because 40 MHz is 2 and dup is 3 */ | |
1123 | if (txrate->flags & IEEE80211_TX_RC_DUP_DATA) | |
1124 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP); | |
1125 | ||
1126 | if (txrate->flags & IEEE80211_TX_RC_SHORT_GI) | |
1127 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI); | |
1128 | ||
1129 | if (txrate->flags & IEEE80211_TX_RC_MCS) { | |
1130 | u32 r = txrate->idx; | |
1131 | u8 *txpower; | |
1132 | ||
1133 | r <<= AR9170_TX_PHY_MCS_SHIFT; | |
1134 | if (WARN_ON(r & ~AR9170_TX_PHY_MCS_MASK)) | |
1135 | goto err_dequeue; | |
1136 | txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK); | |
1137 | txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT); | |
1138 | ||
1139 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) { | |
1140 | if (info->band == IEEE80211_BAND_5GHZ) | |
1141 | txpower = ar->power_5G_ht40; | |
1142 | else | |
1143 | txpower = ar->power_2G_ht40; | |
1144 | } else { | |
1145 | if (info->band == IEEE80211_BAND_5GHZ) | |
1146 | txpower = ar->power_5G_ht20; | |
1147 | else | |
1148 | txpower = ar->power_2G_ht20; | |
1149 | } | |
1150 | ||
1151 | power = txpower[(txrate->idx) & 7]; | |
1152 | } else { | |
1153 | u8 *txpower; | |
1154 | u32 mod; | |
1155 | u32 phyrate; | |
1156 | u8 idx = txrate->idx; | |
1157 | ||
1158 | if (info->band != IEEE80211_BAND_2GHZ) { | |
1159 | idx += 4; | |
1160 | txpower = ar->power_5G_leg; | |
1161 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1162 | } else { | |
1163 | if (idx < 4) { | |
1164 | txpower = ar->power_2G_cck; | |
1165 | mod = AR9170_TX_PHY_MOD_CCK; | |
1166 | } else { | |
1167 | mod = AR9170_TX_PHY_MOD_OFDM; | |
1168 | txpower = ar->power_2G_ofdm; | |
1169 | } | |
1170 | } | |
1171 | ||
1172 | rate = &__ar9170_ratetable[idx]; | |
1173 | ||
1174 | phyrate = rate->hw_value & 0xF; | |
1175 | power = txpower[(rate->hw_value & 0x30) >> 4]; | |
1176 | phyrate <<= AR9170_TX_PHY_MCS_SHIFT; | |
1177 | ||
1178 | txc->phy_control |= cpu_to_le32(mod); | |
1179 | txc->phy_control |= cpu_to_le32(phyrate); | |
1180 | } | |
1181 | ||
1182 | power <<= AR9170_TX_PHY_TX_PWR_SHIFT; | |
1183 | power &= AR9170_TX_PHY_TX_PWR_MASK; | |
1184 | txc->phy_control |= cpu_to_le32(power); | |
1185 | ||
1186 | /* set TX chains */ | |
1187 | if (ar->eeprom.tx_mask == 1) { | |
1188 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1189 | } else { | |
1190 | chains = AR9170_TX_PHY_TXCHAIN_2; | |
1191 | ||
1192 | /* >= 36M legacy OFDM - use only one chain */ | |
1193 | if (rate && rate->bitrate >= 360) | |
1194 | chains = AR9170_TX_PHY_TXCHAIN_1; | |
1195 | } | |
1196 | txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT); | |
1197 | ||
1198 | if (tx_status) { | |
1199 | txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE); | |
1200 | /* | |
1201 | * WARNING: | |
1202 | * Putting the QoS queue bits into an unexplored territory is | |
1203 | * certainly not elegant. | |
1204 | * | |
1205 | * In my defense: This idea provides a reasonable way to | |
1206 | * smuggle valuable information to the tx_status callback. | |
1207 | * Also, the idea behind this bit-abuse came straight from | |
1208 | * the original driver code. | |
1209 | */ | |
1210 | ||
1211 | txc->phy_control |= | |
1212 | cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT); | |
1213 | ||
1214 | if (info->control.sta) { | |
1215 | sta_info = (void *) info->control.sta->drv_priv; | |
4a48e2a4 | 1216 | skb_queue_tail(&sta_info->tx_status[queue], skb); |
e9348cdd CL |
1217 | } else { |
1218 | skb_queue_tail(&ar->global_tx_status, skb); | |
1219 | ||
1220 | queue_delayed_work(ar->hw->workqueue, | |
1221 | &ar->tx_status_janitor, | |
1222 | msecs_to_jiffies(100)); | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | err = ar->tx(ar, skb, tx_status, 0); | |
1227 | if (unlikely(tx_status && err)) { | |
1228 | if (info->control.sta) | |
4a48e2a4 | 1229 | skb_unlink(skb, &sta_info->tx_status[queue]); |
e9348cdd CL |
1230 | else |
1231 | skb_unlink(skb, &ar->global_tx_status); | |
1232 | } | |
1233 | ||
1234 | return NETDEV_TX_OK; | |
1235 | ||
1236 | err_dequeue: | |
1237 | spin_lock_irqsave(&ar->tx_stats_lock, flags); | |
1238 | ar->tx_stats[queue].len--; | |
1239 | ar->tx_stats[queue].count--; | |
1240 | spin_unlock_irqrestore(&ar->tx_stats_lock, flags); | |
1241 | ||
1242 | err_free: | |
1243 | dev_kfree_skb(skb); | |
1244 | return NETDEV_TX_OK; | |
1245 | } | |
1246 | ||
1247 | static int ar9170_op_add_interface(struct ieee80211_hw *hw, | |
1248 | struct ieee80211_if_init_conf *conf) | |
1249 | { | |
1250 | struct ar9170 *ar = hw->priv; | |
1251 | int err = 0; | |
1252 | ||
1253 | mutex_lock(&ar->mutex); | |
1254 | ||
1255 | if (ar->vif) { | |
1256 | err = -EBUSY; | |
1257 | goto unlock; | |
1258 | } | |
1259 | ||
1260 | ar->vif = conf->vif; | |
1261 | memcpy(ar->mac_addr, conf->mac_addr, ETH_ALEN); | |
1262 | ||
1263 | if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) { | |
1264 | ar->rx_software_decryption = true; | |
1265 | ar->disable_offload = true; | |
1266 | } | |
1267 | ||
1268 | ar->cur_filter = 0; | |
1269 | ar->want_filter = AR9170_MAC_REG_FTF_DEFAULTS; | |
1270 | err = ar9170_update_frame_filter(ar); | |
1271 | if (err) | |
1272 | goto unlock; | |
1273 | ||
1274 | err = ar9170_set_operating_mode(ar); | |
1275 | ||
1276 | unlock: | |
1277 | mutex_unlock(&ar->mutex); | |
1278 | return err; | |
1279 | } | |
1280 | ||
1281 | static void ar9170_op_remove_interface(struct ieee80211_hw *hw, | |
1282 | struct ieee80211_if_init_conf *conf) | |
1283 | { | |
1284 | struct ar9170 *ar = hw->priv; | |
1285 | ||
1286 | mutex_lock(&ar->mutex); | |
1287 | ar->vif = NULL; | |
1288 | ar->want_filter = 0; | |
1289 | ar9170_update_frame_filter(ar); | |
1290 | ar9170_set_beacon_timers(ar); | |
1291 | dev_kfree_skb(ar->beacon); | |
1292 | ar->beacon = NULL; | |
1293 | ar->sniffer_enabled = false; | |
1294 | ar->rx_software_decryption = false; | |
1295 | ar9170_set_operating_mode(ar); | |
1296 | mutex_unlock(&ar->mutex); | |
1297 | } | |
1298 | ||
1299 | static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed) | |
1300 | { | |
1301 | struct ar9170 *ar = hw->priv; | |
1302 | int err = 0; | |
1303 | ||
1304 | mutex_lock(&ar->mutex); | |
1305 | ||
e9348cdd CL |
1306 | if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) { |
1307 | /* TODO */ | |
1308 | err = 0; | |
1309 | } | |
1310 | ||
1311 | if (changed & IEEE80211_CONF_CHANGE_PS) { | |
1312 | /* TODO */ | |
1313 | err = 0; | |
1314 | } | |
1315 | ||
1316 | if (changed & IEEE80211_CONF_CHANGE_POWER) { | |
1317 | /* TODO */ | |
1318 | err = 0; | |
1319 | } | |
1320 | ||
1321 | if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) { | |
1322 | /* | |
1323 | * is it long_frame_max_tx_count or short_frame_max_tx_count? | |
1324 | */ | |
1325 | ||
1326 | err = ar9170_set_hwretry_limit(ar, | |
1327 | ar->hw->conf.long_frame_max_tx_count); | |
1328 | if (err) | |
1329 | goto out; | |
1330 | } | |
1331 | ||
57c4d7b4 | 1332 | if (changed & BSS_CHANGED_BEACON_INT) { |
e9348cdd CL |
1333 | err = ar9170_set_beacon_timers(ar); |
1334 | if (err) | |
1335 | goto out; | |
1336 | } | |
1337 | ||
1338 | if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { | |
29ceff5d CL |
1339 | |
1340 | /* adjust slot time for 5 GHz */ | |
1341 | err = ar9170_set_slot_time(ar); | |
1342 | if (err) | |
1343 | goto out; | |
1344 | ||
1345 | err = ar9170_set_dyn_sifs_ack(ar); | |
1346 | if (err) | |
1347 | goto out; | |
1348 | ||
e9348cdd | 1349 | err = ar9170_set_channel(ar, hw->conf.channel, |
9e52b062 JB |
1350 | AR9170_RFI_NONE, |
1351 | nl80211_to_ar9170(hw->conf.channel_type)); | |
e9348cdd CL |
1352 | if (err) |
1353 | goto out; | |
e9348cdd CL |
1354 | } |
1355 | ||
1356 | out: | |
1357 | mutex_unlock(&ar->mutex); | |
1358 | return err; | |
1359 | } | |
1360 | ||
e9348cdd CL |
1361 | static void ar9170_set_filters(struct work_struct *work) |
1362 | { | |
1363 | struct ar9170 *ar = container_of(work, struct ar9170, | |
1364 | filter_config_work); | |
1365 | int err; | |
1366 | ||
e9348cdd | 1367 | if (unlikely(!IS_STARTED(ar))) |
32c1628f | 1368 | return ; |
e9348cdd | 1369 | |
32c1628f | 1370 | mutex_lock(&ar->mutex); |
864cc02e CL |
1371 | if (test_and_clear_bit(AR9170_FILTER_CHANGED_MODE, |
1372 | &ar->filter_changed)) { | |
e9348cdd CL |
1373 | err = ar9170_set_operating_mode(ar); |
1374 | if (err) | |
1375 | goto unlock; | |
1376 | } | |
1377 | ||
864cc02e CL |
1378 | if (test_and_clear_bit(AR9170_FILTER_CHANGED_MULTICAST, |
1379 | &ar->filter_changed)) { | |
e9348cdd CL |
1380 | err = ar9170_update_multicast(ar); |
1381 | if (err) | |
1382 | goto unlock; | |
1383 | } | |
1384 | ||
864cc02e CL |
1385 | if (test_and_clear_bit(AR9170_FILTER_CHANGED_FRAMEFILTER, |
1386 | &ar->filter_changed)) { | |
e9348cdd | 1387 | err = ar9170_update_frame_filter(ar); |
864cc02e CL |
1388 | if (err) |
1389 | goto unlock; | |
1390 | } | |
e9348cdd CL |
1391 | |
1392 | unlock: | |
1393 | mutex_unlock(&ar->mutex); | |
1394 | } | |
1395 | ||
1396 | static void ar9170_op_configure_filter(struct ieee80211_hw *hw, | |
1397 | unsigned int changed_flags, | |
1398 | unsigned int *new_flags, | |
1399 | int mc_count, struct dev_mc_list *mclist) | |
1400 | { | |
1401 | struct ar9170 *ar = hw->priv; | |
1402 | ||
1403 | /* mask supported flags */ | |
1404 | *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC | | |
cca84799 CL |
1405 | FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL; |
1406 | ar->filter_state = *new_flags; | |
e9348cdd CL |
1407 | /* |
1408 | * We can support more by setting the sniffer bit and | |
1409 | * then checking the error flags, later. | |
1410 | */ | |
1411 | ||
1412 | if (changed_flags & FIF_ALLMULTI) { | |
1413 | if (*new_flags & FIF_ALLMULTI) { | |
1414 | ar->want_mc_hash = ~0ULL; | |
1415 | } else { | |
1416 | u64 mchash; | |
1417 | int i; | |
1418 | ||
1419 | /* always get broadcast frames */ | |
864cc02e | 1420 | mchash = 1ULL << (0xff >> 2); |
e9348cdd CL |
1421 | |
1422 | for (i = 0; i < mc_count; i++) { | |
1423 | if (WARN_ON(!mclist)) | |
1424 | break; | |
1425 | mchash |= 1ULL << (mclist->dmi_addr[5] >> 2); | |
1426 | mclist = mclist->next; | |
1427 | } | |
1428 | ar->want_mc_hash = mchash; | |
1429 | } | |
864cc02e | 1430 | set_bit(AR9170_FILTER_CHANGED_MULTICAST, &ar->filter_changed); |
e9348cdd CL |
1431 | } |
1432 | ||
1433 | if (changed_flags & FIF_CONTROL) { | |
1434 | u32 filter = AR9170_MAC_REG_FTF_PSPOLL | | |
1435 | AR9170_MAC_REG_FTF_RTS | | |
1436 | AR9170_MAC_REG_FTF_CTS | | |
1437 | AR9170_MAC_REG_FTF_ACK | | |
1438 | AR9170_MAC_REG_FTF_CFE | | |
1439 | AR9170_MAC_REG_FTF_CFE_ACK; | |
1440 | ||
1441 | if (*new_flags & FIF_CONTROL) | |
1442 | ar->want_filter = ar->cur_filter | filter; | |
1443 | else | |
1444 | ar->want_filter = ar->cur_filter & ~filter; | |
1445 | ||
864cc02e CL |
1446 | set_bit(AR9170_FILTER_CHANGED_FRAMEFILTER, |
1447 | &ar->filter_changed); | |
e9348cdd CL |
1448 | } |
1449 | ||
1450 | if (changed_flags & FIF_PROMISC_IN_BSS) { | |
1451 | ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0; | |
864cc02e CL |
1452 | set_bit(AR9170_FILTER_CHANGED_MODE, |
1453 | &ar->filter_changed); | |
e9348cdd CL |
1454 | } |
1455 | ||
1456 | if (likely(IS_STARTED(ar))) | |
1457 | queue_work(ar->hw->workqueue, &ar->filter_config_work); | |
1458 | } | |
1459 | ||
1460 | static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw, | |
1461 | struct ieee80211_vif *vif, | |
1462 | struct ieee80211_bss_conf *bss_conf, | |
1463 | u32 changed) | |
1464 | { | |
1465 | struct ar9170 *ar = hw->priv; | |
1466 | int err = 0; | |
1467 | ||
1468 | mutex_lock(&ar->mutex); | |
1469 | ||
2d0ddec5 JB |
1470 | if (changed & BSS_CHANGED_BSSID) { |
1471 | memcpy(ar->bssid, bss_conf->bssid, ETH_ALEN); | |
1472 | err = ar9170_set_operating_mode(ar); | |
29ceff5d CL |
1473 | if (err) |
1474 | goto out; | |
2d0ddec5 JB |
1475 | } |
1476 | ||
1477 | if (changed & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED)) { | |
1478 | err = ar9170_update_beacon(ar); | |
29ceff5d CL |
1479 | if (err) |
1480 | goto out; | |
2d0ddec5 | 1481 | |
29ceff5d CL |
1482 | err = ar9170_set_beacon_timers(ar); |
1483 | if (err) | |
1484 | goto out; | |
1485 | } | |
e9348cdd CL |
1486 | |
1487 | if (changed & BSS_CHANGED_ASSOC) { | |
e9348cdd CL |
1488 | #ifndef CONFIG_AR9170_LEDS |
1489 | /* enable assoc LED. */ | |
1490 | err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0); | |
1491 | #endif /* CONFIG_AR9170_LEDS */ | |
1492 | } | |
1493 | ||
29ceff5d | 1494 | if (changed & BSS_CHANGED_BEACON_INT) { |
57c4d7b4 | 1495 | err = ar9170_set_beacon_timers(ar); |
29ceff5d CL |
1496 | if (err) |
1497 | goto out; | |
1498 | } | |
57c4d7b4 | 1499 | |
e9348cdd CL |
1500 | if (changed & BSS_CHANGED_HT) { |
1501 | /* TODO */ | |
1502 | err = 0; | |
1503 | } | |
1504 | ||
1505 | if (changed & BSS_CHANGED_ERP_SLOT) { | |
29ceff5d CL |
1506 | err = ar9170_set_slot_time(ar); |
1507 | if (err) | |
1508 | goto out; | |
e9348cdd CL |
1509 | } |
1510 | ||
1511 | if (changed & BSS_CHANGED_BASIC_RATES) { | |
29ceff5d CL |
1512 | err = ar9170_set_basic_rates(ar); |
1513 | if (err) | |
1514 | goto out; | |
e9348cdd CL |
1515 | } |
1516 | ||
29ceff5d | 1517 | out: |
e9348cdd CL |
1518 | mutex_unlock(&ar->mutex); |
1519 | } | |
1520 | ||
1521 | static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw) | |
1522 | { | |
1523 | struct ar9170 *ar = hw->priv; | |
1524 | int err; | |
1525 | u32 tsf_low; | |
1526 | u32 tsf_high; | |
1527 | u64 tsf; | |
1528 | ||
1529 | mutex_lock(&ar->mutex); | |
1530 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_L, &tsf_low); | |
1531 | if (!err) | |
1532 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_H, &tsf_high); | |
1533 | mutex_unlock(&ar->mutex); | |
1534 | ||
1535 | if (WARN_ON(err)) | |
1536 | return 0; | |
1537 | ||
1538 | tsf = tsf_high; | |
1539 | tsf = (tsf << 32) | tsf_low; | |
1540 | return tsf; | |
1541 | } | |
1542 | ||
1543 | static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, | |
1544 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, | |
1545 | struct ieee80211_key_conf *key) | |
1546 | { | |
1547 | struct ar9170 *ar = hw->priv; | |
1548 | int err = 0, i; | |
1549 | u8 ktype; | |
1550 | ||
1551 | if ((!ar->vif) || (ar->disable_offload)) | |
1552 | return -EOPNOTSUPP; | |
1553 | ||
1554 | switch (key->alg) { | |
1555 | case ALG_WEP: | |
e31a16d6 | 1556 | if (key->keylen == WLAN_KEY_LEN_WEP40) |
e9348cdd CL |
1557 | ktype = AR9170_ENC_ALG_WEP64; |
1558 | else | |
1559 | ktype = AR9170_ENC_ALG_WEP128; | |
1560 | break; | |
1561 | case ALG_TKIP: | |
1562 | ktype = AR9170_ENC_ALG_TKIP; | |
1563 | break; | |
1564 | case ALG_CCMP: | |
1565 | ktype = AR9170_ENC_ALG_AESCCMP; | |
1566 | break; | |
1567 | default: | |
1568 | return -EOPNOTSUPP; | |
1569 | } | |
1570 | ||
1571 | mutex_lock(&ar->mutex); | |
1572 | if (cmd == SET_KEY) { | |
1573 | if (unlikely(!IS_STARTED(ar))) { | |
1574 | err = -EOPNOTSUPP; | |
1575 | goto out; | |
1576 | } | |
1577 | ||
1578 | /* group keys need all-zeroes address */ | |
1579 | if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1580 | sta = NULL; | |
1581 | ||
1582 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) { | |
1583 | for (i = 0; i < 64; i++) | |
1584 | if (!(ar->usedkeys & BIT(i))) | |
1585 | break; | |
1586 | if (i == 64) { | |
1587 | ar->rx_software_decryption = true; | |
1588 | ar9170_set_operating_mode(ar); | |
1589 | err = -ENOSPC; | |
1590 | goto out; | |
1591 | } | |
1592 | } else { | |
1593 | i = 64 + key->keyidx; | |
1594 | } | |
1595 | ||
1596 | key->hw_key_idx = i; | |
1597 | ||
1598 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0, | |
1599 | key->key, min_t(u8, 16, key->keylen)); | |
1600 | if (err) | |
1601 | goto out; | |
1602 | ||
1603 | if (key->alg == ALG_TKIP) { | |
1604 | err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, | |
1605 | ktype, 1, key->key + 16, 16); | |
1606 | if (err) | |
1607 | goto out; | |
1608 | ||
1609 | /* | |
1610 | * hardware is not capable generating the MMIC | |
1611 | * for fragmented frames! | |
1612 | */ | |
1613 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
1614 | } | |
1615 | ||
1616 | if (i < 64) | |
1617 | ar->usedkeys |= BIT(i); | |
1618 | ||
1619 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
1620 | } else { | |
1621 | if (unlikely(!IS_STARTED(ar))) { | |
1622 | /* The device is gone... together with the key ;-) */ | |
1623 | err = 0; | |
1624 | goto out; | |
1625 | } | |
1626 | ||
1627 | err = ar9170_disable_key(ar, key->hw_key_idx); | |
1628 | if (err) | |
1629 | goto out; | |
1630 | ||
1631 | if (key->hw_key_idx < 64) { | |
1632 | ar->usedkeys &= ~BIT(key->hw_key_idx); | |
1633 | } else { | |
1634 | err = ar9170_upload_key(ar, key->hw_key_idx, NULL, | |
1635 | AR9170_ENC_ALG_NONE, 0, | |
1636 | NULL, 0); | |
1637 | if (err) | |
1638 | goto out; | |
1639 | ||
1640 | if (key->alg == ALG_TKIP) { | |
1641 | err = ar9170_upload_key(ar, key->hw_key_idx, | |
1642 | NULL, | |
1643 | AR9170_ENC_ALG_NONE, 1, | |
1644 | NULL, 0); | |
1645 | if (err) | |
1646 | goto out; | |
1647 | } | |
1648 | ||
1649 | } | |
1650 | } | |
1651 | ||
1652 | ar9170_regwrite_begin(ar); | |
1653 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys); | |
1654 | ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32); | |
1655 | ar9170_regwrite_finish(); | |
1656 | err = ar9170_regwrite_result(); | |
1657 | ||
1658 | out: | |
1659 | mutex_unlock(&ar->mutex); | |
1660 | ||
1661 | return err; | |
1662 | } | |
1663 | ||
1664 | static void ar9170_sta_notify(struct ieee80211_hw *hw, | |
1665 | struct ieee80211_vif *vif, | |
1666 | enum sta_notify_cmd cmd, | |
1667 | struct ieee80211_sta *sta) | |
1668 | { | |
1669 | struct ar9170 *ar = hw->priv; | |
1670 | struct ar9170_sta_info *info = (void *) sta->drv_priv; | |
1671 | struct sk_buff *skb; | |
4a48e2a4 | 1672 | unsigned int i; |
e9348cdd CL |
1673 | |
1674 | switch (cmd) { | |
1675 | case STA_NOTIFY_ADD: | |
4a48e2a4 CL |
1676 | for (i = 0; i < ar->hw->queues; i++) |
1677 | skb_queue_head_init(&info->tx_status[i]); | |
e9348cdd CL |
1678 | break; |
1679 | ||
1680 | case STA_NOTIFY_REMOVE: | |
1681 | ||
1682 | /* | |
1683 | * transfer all outstanding frames that need a tx_status | |
4a48e2a4 | 1684 | * reports to the global tx_status queue |
e9348cdd CL |
1685 | */ |
1686 | ||
4a48e2a4 CL |
1687 | for (i = 0; i < ar->hw->queues; i++) { |
1688 | while ((skb = skb_dequeue(&info->tx_status[i]))) { | |
e9348cdd | 1689 | #ifdef AR9170_QUEUE_DEBUG |
4a48e2a4 CL |
1690 | printk(KERN_DEBUG "%s: queueing frame in " |
1691 | "global tx_status queue =>\n", | |
1692 | wiphy_name(ar->hw->wiphy)); | |
e9348cdd | 1693 | |
4a48e2a4 | 1694 | ar9170_print_txheader(ar, skb); |
e9348cdd | 1695 | #endif /* AR9170_QUEUE_DEBUG */ |
4a48e2a4 CL |
1696 | skb_queue_tail(&ar->global_tx_status, skb); |
1697 | } | |
e9348cdd | 1698 | } |
4a48e2a4 CL |
1699 | queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor, |
1700 | msecs_to_jiffies(100)); | |
e9348cdd CL |
1701 | break; |
1702 | ||
1703 | default: | |
1704 | break; | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | static int ar9170_get_stats(struct ieee80211_hw *hw, | |
1709 | struct ieee80211_low_level_stats *stats) | |
1710 | { | |
1711 | struct ar9170 *ar = hw->priv; | |
1712 | u32 val; | |
1713 | int err; | |
1714 | ||
1715 | mutex_lock(&ar->mutex); | |
1716 | err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val); | |
1717 | ar->stats.dot11ACKFailureCount += val; | |
1718 | ||
1719 | memcpy(stats, &ar->stats, sizeof(*stats)); | |
1720 | mutex_unlock(&ar->mutex); | |
1721 | ||
1722 | return 0; | |
1723 | } | |
1724 | ||
1725 | static int ar9170_get_tx_stats(struct ieee80211_hw *hw, | |
1726 | struct ieee80211_tx_queue_stats *tx_stats) | |
1727 | { | |
1728 | struct ar9170 *ar = hw->priv; | |
1729 | ||
1730 | spin_lock_bh(&ar->tx_stats_lock); | |
1731 | memcpy(tx_stats, ar->tx_stats, sizeof(tx_stats[0]) * hw->queues); | |
1732 | spin_unlock_bh(&ar->tx_stats_lock); | |
1733 | ||
1734 | return 0; | |
1735 | } | |
1736 | ||
1737 | static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue, | |
1738 | const struct ieee80211_tx_queue_params *param) | |
1739 | { | |
1740 | struct ar9170 *ar = hw->priv; | |
1741 | int ret; | |
1742 | ||
1743 | mutex_lock(&ar->mutex); | |
4a48e2a4 | 1744 | if ((param) && !(queue > ar->hw->queues)) { |
e9348cdd CL |
1745 | memcpy(&ar->edcf[ar9170_qos_hwmap[queue]], |
1746 | param, sizeof(*param)); | |
1747 | ||
1748 | ret = ar9170_set_qos(ar); | |
1749 | } else | |
1750 | ret = -EINVAL; | |
1751 | ||
1752 | mutex_unlock(&ar->mutex); | |
1753 | return ret; | |
1754 | } | |
1755 | ||
9e52b062 JB |
1756 | static int ar9170_ampdu_action(struct ieee80211_hw *hw, |
1757 | enum ieee80211_ampdu_mlme_action action, | |
1758 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) | |
1759 | { | |
1760 | switch (action) { | |
1761 | case IEEE80211_AMPDU_RX_START: | |
1762 | case IEEE80211_AMPDU_RX_STOP: | |
1763 | /* | |
1764 | * Something goes wrong -- RX locks up | |
1765 | * after a while of receiving aggregated | |
1766 | * frames -- not enabling for now. | |
1767 | */ | |
1768 | return -EOPNOTSUPP; | |
1769 | default: | |
1770 | return -EOPNOTSUPP; | |
1771 | } | |
1772 | } | |
1773 | ||
e9348cdd CL |
1774 | static const struct ieee80211_ops ar9170_ops = { |
1775 | .start = ar9170_op_start, | |
1776 | .stop = ar9170_op_stop, | |
1777 | .tx = ar9170_op_tx, | |
1778 | .add_interface = ar9170_op_add_interface, | |
1779 | .remove_interface = ar9170_op_remove_interface, | |
1780 | .config = ar9170_op_config, | |
e9348cdd CL |
1781 | .configure_filter = ar9170_op_configure_filter, |
1782 | .conf_tx = ar9170_conf_tx, | |
1783 | .bss_info_changed = ar9170_op_bss_info_changed, | |
1784 | .get_tsf = ar9170_op_get_tsf, | |
1785 | .set_key = ar9170_set_key, | |
1786 | .sta_notify = ar9170_sta_notify, | |
1787 | .get_stats = ar9170_get_stats, | |
1788 | .get_tx_stats = ar9170_get_tx_stats, | |
9e52b062 | 1789 | .ampdu_action = ar9170_ampdu_action, |
e9348cdd CL |
1790 | }; |
1791 | ||
1792 | void *ar9170_alloc(size_t priv_size) | |
1793 | { | |
1794 | struct ieee80211_hw *hw; | |
1795 | struct ar9170 *ar; | |
cca84799 | 1796 | struct sk_buff *skb; |
e9348cdd CL |
1797 | int i; |
1798 | ||
cca84799 CL |
1799 | /* |
1800 | * this buffer is used for rx stream reconstruction. | |
1801 | * Under heavy load this device (or the transport layer?) | |
1802 | * tends to split the streams into seperate rx descriptors. | |
1803 | */ | |
1804 | ||
1805 | skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL); | |
1806 | if (!skb) | |
1807 | goto err_nomem; | |
1808 | ||
e9348cdd CL |
1809 | hw = ieee80211_alloc_hw(priv_size, &ar9170_ops); |
1810 | if (!hw) | |
cca84799 | 1811 | goto err_nomem; |
e9348cdd CL |
1812 | |
1813 | ar = hw->priv; | |
1814 | ar->hw = hw; | |
cca84799 | 1815 | ar->rx_failover = skb; |
e9348cdd CL |
1816 | |
1817 | mutex_init(&ar->mutex); | |
1818 | spin_lock_init(&ar->cmdlock); | |
1819 | spin_lock_init(&ar->tx_stats_lock); | |
1820 | skb_queue_head_init(&ar->global_tx_status); | |
1821 | skb_queue_head_init(&ar->global_tx_status_waste); | |
cca84799 | 1822 | ar9170_rx_reset_rx_mpdu(ar); |
e9348cdd CL |
1823 | INIT_WORK(&ar->filter_config_work, ar9170_set_filters); |
1824 | INIT_WORK(&ar->beacon_work, ar9170_new_beacon); | |
1825 | INIT_DELAYED_WORK(&ar->tx_status_janitor, ar9170_tx_status_janitor); | |
1826 | ||
1827 | /* all hw supports 2.4 GHz, so set channel to 1 by default */ | |
1828 | ar->channel = &ar9170_2ghz_chantable[0]; | |
1829 | ||
1830 | /* first part of wiphy init */ | |
1831 | ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | | |
1832 | BIT(NL80211_IFTYPE_WDS) | | |
1833 | BIT(NL80211_IFTYPE_ADHOC); | |
1834 | ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS | | |
1835 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | | |
1836 | IEEE80211_HW_SIGNAL_DBM | | |
1837 | IEEE80211_HW_NOISE_DBM; | |
1838 | ||
4a48e2a4 | 1839 | ar->hw->queues = __AR9170_NUM_TXQ; |
e9348cdd CL |
1840 | ar->hw->extra_tx_headroom = 8; |
1841 | ar->hw->sta_data_size = sizeof(struct ar9170_sta_info); | |
1842 | ||
1843 | ar->hw->max_rates = 1; | |
1844 | ar->hw->max_rate_tries = 3; | |
1845 | ||
1846 | for (i = 0; i < ARRAY_SIZE(ar->noise); i++) | |
1847 | ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ | |
1848 | ||
1849 | return ar; | |
cca84799 CL |
1850 | |
1851 | err_nomem: | |
1852 | kfree_skb(skb); | |
1853 | return ERR_PTR(-ENOMEM); | |
e9348cdd | 1854 | } |
e9348cdd CL |
1855 | |
1856 | static int ar9170_read_eeprom(struct ar9170 *ar) | |
1857 | { | |
1858 | #define RW 8 /* number of words to read at once */ | |
1859 | #define RB (sizeof(u32) * RW) | |
1860 | DECLARE_MAC_BUF(mbuf); | |
1861 | u8 *eeprom = (void *)&ar->eeprom; | |
1862 | u8 *addr = ar->eeprom.mac_address; | |
1863 | __le32 offsets[RW]; | |
1864 | int i, j, err, bands = 0; | |
1865 | ||
1866 | BUILD_BUG_ON(sizeof(ar->eeprom) & 3); | |
1867 | ||
1868 | BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4); | |
1869 | #ifndef __CHECKER__ | |
1870 | /* don't want to handle trailing remains */ | |
1871 | BUILD_BUG_ON(sizeof(ar->eeprom) % RB); | |
1872 | #endif | |
1873 | ||
1874 | for (i = 0; i < sizeof(ar->eeprom)/RB; i++) { | |
1875 | for (j = 0; j < RW; j++) | |
1876 | offsets[j] = cpu_to_le32(AR9170_EEPROM_START + | |
1877 | RB * i + 4 * j); | |
1878 | ||
1879 | err = ar->exec_cmd(ar, AR9170_CMD_RREG, | |
1880 | RB, (u8 *) &offsets, | |
1881 | RB, eeprom + RB * i); | |
1882 | if (err) | |
1883 | return err; | |
1884 | } | |
1885 | ||
1886 | #undef RW | |
1887 | #undef RB | |
1888 | ||
1889 | if (ar->eeprom.length == cpu_to_le16(0xFFFF)) | |
1890 | return -ENODATA; | |
1891 | ||
1892 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { | |
1893 | ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz; | |
1894 | bands++; | |
1895 | } | |
1896 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { | |
1897 | ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz; | |
1898 | bands++; | |
1899 | } | |
1900 | /* | |
1901 | * I measured this, a bandswitch takes roughly | |
1902 | * 135 ms and a frequency switch about 80. | |
1903 | * | |
1904 | * FIXME: measure these values again once EEPROM settings | |
1905 | * are used, that will influence them! | |
1906 | */ | |
1907 | if (bands == 2) | |
1908 | ar->hw->channel_change_time = 135 * 1000; | |
1909 | else | |
1910 | ar->hw->channel_change_time = 80 * 1000; | |
1911 | ||
1878f77e CL |
1912 | ar->regulatory.current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); |
1913 | ar->regulatory.current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]); | |
1914 | ||
e9348cdd CL |
1915 | /* second part of wiphy init */ |
1916 | SET_IEEE80211_PERM_ADDR(ar->hw, addr); | |
1917 | ||
1918 | return bands ? 0 : -EINVAL; | |
1919 | } | |
1920 | ||
1878f77e CL |
1921 | static int ar9170_reg_notifier(struct wiphy *wiphy, |
1922 | struct regulatory_request *request) | |
1923 | { | |
1924 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); | |
1925 | struct ar9170 *ar = hw->priv; | |
1926 | ||
1927 | return ath_reg_notifier_apply(wiphy, request, &ar->regulatory); | |
1928 | } | |
1929 | ||
e9348cdd CL |
1930 | int ar9170_register(struct ar9170 *ar, struct device *pdev) |
1931 | { | |
1932 | int err; | |
1933 | ||
1934 | /* try to read EEPROM, init MAC addr */ | |
1935 | err = ar9170_read_eeprom(ar); | |
1936 | if (err) | |
1937 | goto err_out; | |
1938 | ||
1878f77e CL |
1939 | err = ath_regd_init(&ar->regulatory, ar->hw->wiphy, |
1940 | ar9170_reg_notifier); | |
85efc86e LR |
1941 | if (err) |
1942 | goto err_out; | |
1878f77e | 1943 | |
e9348cdd CL |
1944 | err = ieee80211_register_hw(ar->hw); |
1945 | if (err) | |
1946 | goto err_out; | |
1947 | ||
1878f77e CL |
1948 | if (!ath_is_world_regd(&ar->regulatory)) |
1949 | regulatory_hint(ar->hw->wiphy, ar->regulatory.alpha2); | |
1950 | ||
e9348cdd CL |
1951 | err = ar9170_init_leds(ar); |
1952 | if (err) | |
1953 | goto err_unreg; | |
1954 | ||
1955 | #ifdef CONFIG_AR9170_LEDS | |
1956 | err = ar9170_register_leds(ar); | |
1957 | if (err) | |
1958 | goto err_unreg; | |
1959 | #endif /* CONFIG_AR9170_LEDS */ | |
1960 | ||
1961 | dev_info(pdev, "Atheros AR9170 is registered as '%s'\n", | |
1962 | wiphy_name(ar->hw->wiphy)); | |
1963 | ||
1964 | return err; | |
1965 | ||
1966 | err_unreg: | |
1967 | ieee80211_unregister_hw(ar->hw); | |
1968 | ||
1969 | err_out: | |
1970 | return err; | |
1971 | } | |
e9348cdd CL |
1972 | |
1973 | void ar9170_unregister(struct ar9170 *ar) | |
1974 | { | |
1975 | #ifdef CONFIG_AR9170_LEDS | |
1976 | ar9170_unregister_leds(ar); | |
1977 | #endif /* CONFIG_AR9170_LEDS */ | |
1978 | ||
cca84799 | 1979 | kfree_skb(ar->rx_failover); |
e9348cdd CL |
1980 | ieee80211_unregister_hw(ar->hw); |
1981 | mutex_destroy(&ar->mutex); | |
1982 | } |