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Merge branch 'master' of git://dev.medozas.de/linux
[net-next-2.6.git] / drivers / net / wireless / p54 / txrx.c
CommitLineData
0a5fb84f
CL		 1/*
2 * Common code for mac80211 Prism54 drivers
3 *
4 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
5 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 *
8 * Based on:
9 * - the islsm (softmac prism54) driver, which is:
10 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
11 * - stlc45xx driver
12 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 */
18
19#include <linux/init.h>
20#include <linux/firmware.h>
21#include <linux/etherdevice.h>
22
23#include <net/mac80211.h>
24
25#include "p54.h"
26#include "lmac.h"
27
28#ifdef P54_MM_DEBUG
29static void p54_dump_tx_queue(struct p54_common *priv)
30{
31 unsigned long flags;
32 struct ieee80211_tx_info *info;
33 struct p54_tx_info *range;
34 struct sk_buff *skb;
35 struct p54_hdr *hdr;
36 unsigned int i = 0;
37 u32 prev_addr;
38 u32 largest_hole = 0, free;
39
40 spin_lock_irqsave(&priv->tx_queue.lock, flags);
4a89852c 41 printk(KERN_DEBUG "%s: / --- tx queue dump (%d entries) ---\n",
0a5fb84f
CL		 42 wiphy_name(priv->hw->wiphy), skb_queue_len(&priv->tx_queue));
43
44 prev_addr = priv->rx_start;
45 skb_queue_walk(&priv->tx_queue, skb) {
46 info = IEEE80211_SKB_CB(skb);
47 range = (void *) info->rate_driver_data;
48 hdr = (void *) skb->data;
49
50 free = range->start_addr - prev_addr;
51 printk(KERN_DEBUG "%s: | [%02d] => [skb:%p skb_len:0x%04x "
52 "hdr:{flags:%02x len:%04x req_id:%04x type:%02x} "
53 "mem:{start:%04x end:%04x, free:%d}]\n",
54 wiphy_name(priv->hw->wiphy), i++, skb, skb->len,
55 le16_to_cpu(hdr->flags), le16_to_cpu(hdr->len),
56 le32_to_cpu(hdr->req_id), le16_to_cpu(hdr->type),
57 range->start_addr, range->end_addr, free);
58
59 prev_addr = range->end_addr;
60 largest_hole = max(largest_hole, free);
61 }
62 free = priv->rx_end - prev_addr;
63 largest_hole = max(largest_hole, free);
64 printk(KERN_DEBUG "%s: \\ --- [free: %d], largest free block: %d ---\n",
65 wiphy_name(priv->hw->wiphy), free, largest_hole);
66 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
67}
68#endif /* P54_MM_DEBUG */
69
70/*
71 * So, the firmware is somewhat stupid and doesn't know what places in its
72 * memory incoming data should go to. By poking around in the firmware, we
73 * can find some unused memory to upload our packets to. However, data that we
74 * want the card to TX needs to stay intact until the card has told us that
75 * it is done with it. This function finds empty places we can upload to and
76 * marks allocated areas as reserved if necessary. p54_find_and_unlink_skb or
77 * p54_free_skb frees allocated areas.
78 */
79static int p54_assign_address(struct p54_common *priv, struct sk_buff *skb)
80{
81 struct sk_buff *entry, *target_skb = NULL;
82 struct ieee80211_tx_info *info;
83 struct p54_tx_info *range;
84 struct p54_hdr *data = (void *) skb->data;
85 unsigned long flags;
86 u32 last_addr = priv->rx_start;
87 u32 target_addr = priv->rx_start;
88 u16 len = priv->headroom + skb->len + priv->tailroom + 3;
89
0a5fb84f
CL		 90 info = IEEE80211_SKB_CB(skb);
91 range = (void *) info->rate_driver_data;
92 len = (range->extra_len + len) & ~0x3;
93
94 spin_lock_irqsave(&priv->tx_queue.lock, flags);
95 if (unlikely(skb_queue_len(&priv->tx_queue) == 32)) {
96 /*
97 * The tx_queue is now really full.
98 *
99 * TODO: check if the device has crashed and reset it.
100 */
101 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
102 return -EBUSY;
103 }
104
105 skb_queue_walk(&priv->tx_queue, entry) {
106 u32 hole_size;
107 info = IEEE80211_SKB_CB(entry);
108 range = (void *) info->rate_driver_data;
109 hole_size = range->start_addr - last_addr;
110
0a5fb84f
CL		 111 if (!target_skb && hole_size >= len) {
112 target_skb = entry->prev;
113 hole_size -= len;
114 target_addr = last_addr;
115 break;
116 }
117 last_addr = range->end_addr;
118 }
119 if (unlikely(!target_skb)) {
120 if (priv->rx_end - last_addr >= len) {
121 target_skb = priv->tx_queue.prev;
122 if (!skb_queue_empty(&priv->tx_queue)) {
123 info = IEEE80211_SKB_CB(target_skb);
124 range = (void *)info->rate_driver_data;
125 target_addr = range->end_addr;
126 }
127 } else {
128 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
129 return -ENOSPC;
130 }
131 }
132
133 info = IEEE80211_SKB_CB(skb);
134 range = (void *) info->rate_driver_data;
135 range->start_addr = target_addr;
136 range->end_addr = target_addr + len;
46df10ae
CL		 137 data->req_id = cpu_to_le32(target_addr + priv->headroom);
138 if (IS_DATA_FRAME(skb) &&
139 unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON))
140 priv->beacon_req_id = data->req_id;
141
0a5fb84f
CL		 142 __skb_queue_after(&priv->tx_queue, target_skb, skb);
143 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
0a5fb84f
CL		 144 return 0;
145}
146
147static void p54_tx_pending(struct p54_common *priv)
148{
149 struct sk_buff *skb;
150 int ret;
151
0a5fb84f
CL		 152 skb = skb_dequeue(&priv->tx_pending);
153 if (unlikely(!skb))
154 return ;
155
156 ret = p54_assign_address(priv, skb);
157 if (unlikely(ret))
158 skb_queue_head(&priv->tx_pending, skb);
159 else
160 priv->tx(priv->hw, skb);
161}
162
163static void p54_wake_queues(struct p54_common *priv)
164{
165 unsigned long flags;
166 unsigned int i;
167
168 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
169 return ;
170
171 p54_tx_pending(priv);
172
173 spin_lock_irqsave(&priv->tx_stats_lock, flags);
174 for (i = 0; i < priv->hw->queues; i++) {
175 if (priv->tx_stats[i + P54_QUEUE_DATA].len <
176 priv->tx_stats[i + P54_QUEUE_DATA].limit)
177 ieee80211_wake_queue(priv->hw, i);
178 }
179 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
180}
181
182static int p54_tx_qos_accounting_alloc(struct p54_common *priv,
183 struct sk_buff *skb,
184 const u16 p54_queue)
185{
97e93fcd 186 struct p54_tx_queue_stats *queue;
0a5fb84f
CL		 187 unsigned long flags;
188
088ea189 189 if (WARN_ON(p54_queue >= P54_QUEUE_NUM))
0a5fb84f
CL		 190 return -EINVAL;
191
192 queue = &priv->tx_stats[p54_queue];
193
194 spin_lock_irqsave(&priv->tx_stats_lock, flags);
2ffa5fed 195 if (unlikely(queue->len >= queue->limit && IS_QOS_QUEUE(p54_queue))) {
0a5fb84f
CL		 196 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
197 return -ENOSPC;
198 }
199
200 queue->len++;
201 queue->count++;
202
203 if (unlikely(queue->len == queue->limit && IS_QOS_QUEUE(p54_queue))) {
204 u16 ac_queue = p54_queue - P54_QUEUE_DATA;
205 ieee80211_stop_queue(priv->hw, ac_queue);
206 }
207
208 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
209 return 0;
210}
211
212static void p54_tx_qos_accounting_free(struct p54_common *priv,
213 struct sk_buff *skb)
214{
12f49a79 215 if (IS_DATA_FRAME(skb)) {
2ffa5fed 216 unsigned long flags;
0a5fb84f 217
2ffa5fed 218 spin_lock_irqsave(&priv->tx_stats_lock, flags);
46df10ae 219 priv->tx_stats[GET_HW_QUEUE(skb)].len--;
2ffa5fed 220 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
46df10ae
CL		 221
222 if (unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON)) {
223 if (priv->beacon_req_id == GET_REQ_ID(skb)) {
224 /* this is the active beacon set anymore */
225 priv->beacon_req_id = 0;
226 }
227 complete(&priv->beacon_comp);
228 }
0a5fb84f
CL		 229 }
230 p54_wake_queues(priv);
231}
232
233void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
234{
235 struct p54_common *priv = dev->priv;
236 if (unlikely(!skb))
237 return ;
238
239 skb_unlink(skb, &priv->tx_queue);
240 p54_tx_qos_accounting_free(priv, skb);
241 dev_kfree_skb_any(skb);
242}
243EXPORT_SYMBOL_GPL(p54_free_skb);
244
245static struct sk_buff *p54_find_and_unlink_skb(struct p54_common *priv,
246 const __le32 req_id)
247{
248 struct sk_buff *entry;
249 unsigned long flags;
250
251 spin_lock_irqsave(&priv->tx_queue.lock, flags);
252 skb_queue_walk(&priv->tx_queue, entry) {
253 struct p54_hdr *hdr = (struct p54_hdr *) entry->data;
254
255 if (hdr->req_id == req_id) {
256 __skb_unlink(entry, &priv->tx_queue);
257 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
258 p54_tx_qos_accounting_free(priv, entry);
259 return entry;
260 }
261 }
262 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
263 return NULL;
264}
265
266void p54_tx(struct p54_common *priv, struct sk_buff *skb)
267{
0a5fb84f
CL		 268 skb_queue_tail(&priv->tx_pending, skb);
269 p54_tx_pending(priv);
270}
271
272static int p54_rssi_to_dbm(struct p54_common *priv, int rssi)
273{
274 int band = priv->hw->conf.channel->band;
275
276 if (priv->rxhw != 5)
277 return ((rssi * priv->rssical_db[band].mul) / 64 +
278 priv->rssical_db[band].add) / 4;
279 else
280 /*
281 * TODO: find the correct formula
282 */
283 return ((rssi * priv->rssical_db[band].mul) / 64 +
284 priv->rssical_db[band].add) / 4;
285}
286
e0f114e8
CL		 287/*
288 * Even if the firmware is capable of dealing with incoming traffic,
289 * while dozing, we have to prepared in case mac80211 uses PS-POLL
290 * to retrieve outstanding frames from our AP.
291 * (see comment in net/mac80211/mlme.c @ line 1993)
292 */
293static void p54_pspoll_workaround(struct p54_common *priv, struct sk_buff *skb)
294{
295 struct ieee80211_hdr *hdr = (void *) skb->data;
296 struct ieee80211_tim_ie *tim_ie;
297 u8 *tim;
298 u8 tim_len;
299 bool new_psm;
300
301 /* only beacons have a TIM IE */
302 if (!ieee80211_is_beacon(hdr->frame_control))
303 return;
304
305 if (!priv->aid)
306 return;
307
308 /* only consider beacons from the associated BSSID */
309 if (compare_ether_addr(hdr->addr3, priv->bssid))
310 return;
311
312 tim = p54_find_ie(skb, WLAN_EID_TIM);
313 if (!tim)
314 return;
315
316 tim_len = tim[1];
317 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
318
319 new_psm = ieee80211_check_tim(tim_ie, tim_len, priv->aid);
320 if (new_psm != priv->powersave_override) {
321 priv->powersave_override = new_psm;
322 p54_set_ps(priv);
323 }
324}
325
0a5fb84f
CL		 326static int p54_rx_data(struct p54_common *priv, struct sk_buff *skb)
327{
328 struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
329 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
330 u16 freq = le16_to_cpu(hdr->freq);
331 size_t header_len = sizeof(*hdr);
332 u32 tsf32;
333 u8 rate = hdr->rate & 0xf;
334
335 /*
336 * If the device is in a unspecified state we have to
337 * ignore all data frames. Else we could end up with a
338 * nasty crash.
339 */
340 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
341 return 0;
342
343 if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD)))
344 return 0;
345
346 if (hdr->decrypt_status == P54_DECRYPT_OK)
347 rx_status->flag |= RX_FLAG_DECRYPTED;
348 if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) ||
349 (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP))
350 rx_status->flag |= RX_FLAG_MMIC_ERROR;
351
352 rx_status->signal = p54_rssi_to_dbm(priv, hdr->rssi);
0a5fb84f
CL		 353 if (hdr->rate & 0x10)
354 rx_status->flag |= RX_FLAG_SHORTPRE;
355 if (priv->hw->conf.channel->band == IEEE80211_BAND_5GHZ)
356 rx_status->rate_idx = (rate < 4) ? 0 : rate - 4;
357 else
358 rx_status->rate_idx = rate;
359
360 rx_status->freq = freq;
361 rx_status->band = priv->hw->conf.channel->band;
362 rx_status->antenna = hdr->antenna;
363
364 tsf32 = le32_to_cpu(hdr->tsf32);
365 if (tsf32 < priv->tsf_low32)
366 priv->tsf_high32++;
367 rx_status->mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
368 priv->tsf_low32 = tsf32;
369
370 rx_status->flag |= RX_FLAG_TSFT;
371
372 if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
373 header_len += hdr->align[0];
374
375 skb_pull(skb, header_len);
376 skb_trim(skb, le16_to_cpu(hdr->len));
e0f114e8
CL		 377 if (unlikely(priv->hw->conf.flags & IEEE80211_CONF_PS))
378 p54_pspoll_workaround(priv, skb);
379
0a5fb84f
CL		 380 ieee80211_rx_irqsafe(priv->hw, skb);
381
42935eca 382 ieee80211_queue_delayed_work(priv->hw, &priv->work,
0a5fb84f
CL		 383 msecs_to_jiffies(P54_STATISTICS_UPDATE));
384
385 return -1;
386}
387
388static void p54_rx_frame_sent(struct p54_common *priv, struct sk_buff *skb)
389{
390 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
391 struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
392 struct ieee80211_tx_info *info;
393 struct p54_hdr *entry_hdr;
394 struct p54_tx_data *entry_data;
395 struct sk_buff *entry;
396 unsigned int pad = 0, frame_len;
397 int count, idx;
398
399 entry = p54_find_and_unlink_skb(priv, hdr->req_id);
400 if (unlikely(!entry))
401 return ;
402
403 frame_len = entry->len;
404 info = IEEE80211_SKB_CB(entry);
405 entry_hdr = (struct p54_hdr *) entry->data;
406 entry_data = (struct p54_tx_data *) entry_hdr->data;
407 priv->stats.dot11ACKFailureCount += payload->tries - 1;
408
409 /*
410 * Frames in P54_QUEUE_FWSCAN and P54_QUEUE_BEACON are
411 * generated by the driver. Therefore tx_status is bogus
412 * and we don't want to confuse the mac80211 stack.
413 */
414 if (unlikely(entry_data->hw_queue < P54_QUEUE_FWSCAN)) {
0a5fb84f
CL		 415 dev_kfree_skb_any(entry);
416 return ;
417 }
418
419 /*
420 * Clear manually, ieee80211_tx_info_clear_status would
421 * clear the counts too and we need them.
422 */
423 memset(&info->status.ampdu_ack_len, 0,
424 sizeof(struct ieee80211_tx_info) -
425 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
426 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
427 status.ampdu_ack_len) != 23);
428
429 if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
430 pad = entry_data->align[0];
431
432 /* walk through the rates array and adjust the counts */
433 count = payload->tries;
434 for (idx = 0; idx < 4; idx++) {
435 if (count >= info->status.rates[idx].count) {
436 count -= info->status.rates[idx].count;
437 } else if (count > 0) {
438 info->status.rates[idx].count = count;
439 count = 0;
440 } else {
441 info->status.rates[idx].idx = -1;
442 info->status.rates[idx].count = 0;
443 }
444 }
445
446 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
447 (!payload->status))
448 info->flags |= IEEE80211_TX_STAT_ACK;
449 if (payload->status & P54_TX_PSM_CANCELLED)
450 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
451 info->status.ack_signal = p54_rssi_to_dbm(priv,
452 (int)payload->ack_rssi);
453
454 /* Undo all changes to the frame. */
455 switch (entry_data->key_type) {
456 case P54_CRYPTO_TKIPMICHAEL: {
457 u8 *iv = (u8 *)(entry_data->align + pad +
458 entry_data->crypt_offset);
459
460 /* Restore the original TKIP IV. */
461 iv[2] = iv[0];
462 iv[0] = iv[1];
463 iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */
464
465 frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */
466 break;
467 }
468 case P54_CRYPTO_AESCCMP:
469 frame_len -= 8; /* remove CCMP_MIC */
470 break;
471 case P54_CRYPTO_WEP:
472 frame_len -= 4; /* remove WEP_ICV */
473 break;
474 }
475
476 skb_trim(entry, frame_len);
477 skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
478 ieee80211_tx_status_irqsafe(priv->hw, entry);
479}
480
481static void p54_rx_eeprom_readback(struct p54_common *priv,
482 struct sk_buff *skb)
483{
484 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
485 struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
486 struct sk_buff *tmp;
487
488 if (!priv->eeprom)
489 return ;
490
491 if (priv->fw_var >= 0x509) {
492 memcpy(priv->eeprom, eeprom->v2.data,
493 le16_to_cpu(eeprom->v2.len));
494 } else {
495 memcpy(priv->eeprom, eeprom->v1.data,
496 le16_to_cpu(eeprom->v1.len));
497 }
498
499 priv->eeprom = NULL;
500 tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
0a5fb84f
CL		 501 dev_kfree_skb_any(tmp);
502 complete(&priv->eeprom_comp);
503}
504
505static void p54_rx_stats(struct p54_common *priv, struct sk_buff *skb)
506{
507 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
508 struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
509 struct sk_buff *tmp;
510 u32 tsf32;
511
512 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
513 return ;
514
515 tsf32 = le32_to_cpu(stats->tsf32);
516 if (tsf32 < priv->tsf_low32)
517 priv->tsf_high32++;
518 priv->tsf_low32 = tsf32;
519
520 priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
521 priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
522 priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
523
524 priv->noise = p54_rssi_to_dbm(priv, le32_to_cpu(stats->noise));
525
526 tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
0a5fb84f
CL		 527 dev_kfree_skb_any(tmp);
528}
529
530static void p54_rx_trap(struct p54_common *priv, struct sk_buff *skb)
531{
532 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
533 struct p54_trap *trap = (struct p54_trap *) hdr->data;
534 u16 event = le16_to_cpu(trap->event);
535 u16 freq = le16_to_cpu(trap->frequency);
536
537 switch (event) {
538 case P54_TRAP_BEACON_TX:
539 break;
540 case P54_TRAP_RADAR:
541 printk(KERN_INFO "%s: radar (freq:%d MHz)\n",
542 wiphy_name(priv->hw->wiphy), freq);
543 break;
544 case P54_TRAP_NO_BEACON:
545 if (priv->vif)
546 ieee80211_beacon_loss(priv->vif);
547 break;
548 case P54_TRAP_SCAN:
549 break;
550 case P54_TRAP_TBTT:
551 break;
552 case P54_TRAP_TIMER:
553 break;
6208f8b2
CL		 554 case P54_TRAP_FAA_RADIO_OFF:
555 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
556 break;
557 case P54_TRAP_FAA_RADIO_ON:
558 wiphy_rfkill_set_hw_state(priv->hw->wiphy, false);
559 break;
0a5fb84f
CL		 560 default:
561 printk(KERN_INFO "%s: received event:%x freq:%d\n",
562 wiphy_name(priv->hw->wiphy), event, freq);
563 break;
564 }
565}
566
567static int p54_rx_control(struct p54_common *priv, struct sk_buff *skb)
568{
569 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
570
571 switch (le16_to_cpu(hdr->type)) {
572 case P54_CONTROL_TYPE_TXDONE:
573 p54_rx_frame_sent(priv, skb);
574 break;
575 case P54_CONTROL_TYPE_TRAP:
576 p54_rx_trap(priv, skb);
577 break;
578 case P54_CONTROL_TYPE_BBP:
579 break;
580 case P54_CONTROL_TYPE_STAT_READBACK:
581 p54_rx_stats(priv, skb);
582 break;
583 case P54_CONTROL_TYPE_EEPROM_READBACK:
584 p54_rx_eeprom_readback(priv, skb);
585 break;
586 default:
587 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
588 wiphy_name(priv->hw->wiphy), le16_to_cpu(hdr->type));
589 break;
590 }
591 return 0;
592}
593
594/* returns zero if skb can be reused */
595int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
596{
597 struct p54_common *priv = dev->priv;
598 u16 type = le16_to_cpu(*((__le16 *)skb->data));
599
600 if (type & P54_HDR_FLAG_CONTROL)
601 return p54_rx_control(priv, skb);
602 else
603 return p54_rx_data(priv, skb);
604}
605EXPORT_SYMBOL_GPL(p54_rx);
606
607static void p54_tx_80211_header(struct p54_common *priv, struct sk_buff *skb,
608 struct ieee80211_tx_info *info, u8 *queue,
609 u32 *extra_len, u16 *flags, u16 *aid,
610 bool *burst_possible)
611{
612 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
613
614 if (ieee80211_is_data_qos(hdr->frame_control))
615 *burst_possible = true;
616 else
617 *burst_possible = false;
618
619 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
620 *flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
621
3fa52056 622 if (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)
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CL		 623 *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
624
90d6f928
CL		 625 if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
626 *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
627
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CL		 628 *queue = skb_get_queue_mapping(skb) + P54_QUEUE_DATA;
629
630 switch (priv->mode) {
631 case NL80211_IFTYPE_MONITOR:
632 /*
633 * We have to set P54_HDR_FLAG_DATA_OUT_PROMISC for
634 * every frame in promiscuous/monitor mode.
635 * see STSW45x0C LMAC API - page 12.
636 */
637 *aid = 0;
638 *flags |= P54_HDR_FLAG_DATA_OUT_PROMISC;
639 break;
640 case NL80211_IFTYPE_STATION:
641 *aid = 1;
642 break;
643 case NL80211_IFTYPE_AP:
644 case NL80211_IFTYPE_ADHOC:
645 case NL80211_IFTYPE_MESH_POINT:
646 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
647 *aid = 0;
648 *queue = P54_QUEUE_CAB;
649 return;
650 }
651
652 if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
653 if (ieee80211_is_probe_resp(hdr->frame_control)) {
654 *aid = 0;
655 *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
656 P54_HDR_FLAG_DATA_OUT_NOCANCEL;
657 return;
658 } else if (ieee80211_is_beacon(hdr->frame_control)) {
659 *aid = 0;
660
661 if (info->flags & IEEE80211_TX_CTL_INJECTED) {
662 /*
663 * Injecting beacons on top of a AP is
664 * not a good idea... nevertheless,
665 * it should be doable.
666 */
667
668 return;
669 }
670
671 *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
672 *queue = P54_QUEUE_BEACON;
673 *extra_len = IEEE80211_MAX_TIM_LEN;
674 return;
675 }
676 }
677
678 if (info->control.sta)
679 *aid = info->control.sta->aid;
680 break;
681 }
682}
683
684static u8 p54_convert_algo(enum ieee80211_key_alg alg)
685{
686 switch (alg) {
687 case ALG_WEP:
688 return P54_CRYPTO_WEP;
689 case ALG_TKIP:
690 return P54_CRYPTO_TKIPMICHAEL;
691 case ALG_CCMP:
692 return P54_CRYPTO_AESCCMP;
693 default:
694 return 0;
695 }
696}
697
698int p54_tx_80211(struct ieee80211_hw *dev, struct sk_buff *skb)
699{
700 struct p54_common *priv = dev->priv;
701 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
702 struct p54_tx_info *p54info;
703 struct p54_hdr *hdr;
704 struct p54_tx_data *txhdr;
705 unsigned int padding, len, extra_len;
706 int i, j, ridx;
707 u16 hdr_flags = 0, aid = 0;
708 u8 rate, queue = 0, crypt_offset = 0;
709 u8 cts_rate = 0x20;
710 u8 rc_flags;
711 u8 calculated_tries[4];
712 u8 nrates = 0, nremaining = 8;
713 bool burst_allowed = false;
714
715 p54_tx_80211_header(priv, skb, info, &queue, &extra_len,
716 &hdr_flags, &aid, &burst_allowed);
717
718 if (p54_tx_qos_accounting_alloc(priv, skb, queue)) {
719 if (!IS_QOS_QUEUE(queue)) {
720 dev_kfree_skb_any(skb);
721 return NETDEV_TX_OK;
722 } else {
723 return NETDEV_TX_BUSY;
724 }
725 }
726
727 padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
728 len = skb->len;
729
730 if (info->control.hw_key) {
731 crypt_offset = ieee80211_get_hdrlen_from_skb(skb);
732 if (info->control.hw_key->alg == ALG_TKIP) {
733 u8 *iv = (u8 *)(skb->data + crypt_offset);
734 /*
735 * The firmware excepts that the IV has to have
736 * this special format
737 */
738 iv[1] = iv[0];
739 iv[0] = iv[2];
740 iv[2] = 0;
741 }
742 }
743
744 txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
745 hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
746
747 if (padding)
748 hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
749 hdr->type = cpu_to_le16(aid);
750 hdr->rts_tries = info->control.rates[0].count;
751
752 /*
753 * we register the rates in perfect order, and
754 * RTS/CTS won't happen on 5 GHz
755 */
756 cts_rate = info->control.rts_cts_rate_idx;
757
758 memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
759
760 /* see how many rates got used */
761 for (i = 0; i < dev->max_rates; i++) {
762 if (info->control.rates[i].idx < 0)
763 break;
764 nrates++;
765 }
766
767 /* limit tries to 8/nrates per rate */
768 for (i = 0; i < nrates; i++) {
769 /*
770 * The magic expression here is equivalent to 8/nrates for
771 * all values that matter, but avoids division and jumps.
772 * Note that nrates can only take the values 1 through 4.
773 */
774 calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
775 info->control.rates[i].count);
776 nremaining -= calculated_tries[i];
777 }
778
779 /* if there are tries left, distribute from back to front */
780 for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
781 int tmp = info->control.rates[i].count - calculated_tries[i];
782
783 if (tmp <= 0)
784 continue;
785 /* RC requested more tries at this rate */
786
787 tmp = min_t(int, tmp, nremaining);
788 calculated_tries[i] += tmp;
789 nremaining -= tmp;
790 }
791
792 ridx = 0;
793 for (i = 0; i < nrates && ridx < 8; i++) {
794 /* we register the rates in perfect order */
795 rate = info->control.rates[i].idx;
796 if (info->band == IEEE80211_BAND_5GHZ)
797 rate += 4;
798
799 /* store the count we actually calculated for TX status */
800 info->control.rates[i].count = calculated_tries[i];
801
802 rc_flags = info->control.rates[i].flags;
803 if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
804 rate |= 0x10;
805 cts_rate |= 0x10;
806 }
807 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
808 burst_allowed = false;
809 rate |= 0x40;
810 } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
811 rate |= 0x20;
812 burst_allowed = false;
813 }
814 for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
815 txhdr->rateset[ridx] = rate;
816 ridx++;
817 }
818 }
819
820 if (burst_allowed)
821 hdr_flags |= P54_HDR_FLAG_DATA_OUT_BURST;
822
823 /* TODO: enable bursting */
824 hdr->flags = cpu_to_le16(hdr_flags);
825 hdr->tries = ridx;
826 txhdr->rts_rate_idx = 0;
827 if (info->control.hw_key) {
828 txhdr->key_type = p54_convert_algo(info->control.hw_key->alg);
829 txhdr->key_len = min((u8)16, info->control.hw_key->keylen);
830 memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len);
831 if (info->control.hw_key->alg == ALG_TKIP) {
832 /* reserve space for the MIC key */
833 len += 8;
834 memcpy(skb_put(skb, 8), &(info->control.hw_key->key
835 [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8);
836 }
837 /* reserve some space for ICV */
838 len += info->control.hw_key->icv_len;
839 memset(skb_put(skb, info->control.hw_key->icv_len), 0,
840 info->control.hw_key->icv_len);
841 } else {
842 txhdr->key_type = 0;
843 txhdr->key_len = 0;
844 }
845 txhdr->crypt_offset = crypt_offset;
846 txhdr->hw_queue = queue;
847 txhdr->backlog = priv->tx_stats[queue].len - 1;
848 memset(txhdr->durations, 0, sizeof(txhdr->durations));
849 txhdr->tx_antenna = ((info->antenna_sel_tx == 0) ?
850 2 : info->antenna_sel_tx - 1) & priv->tx_diversity_mask;
851 if (priv->rxhw == 5) {
852 txhdr->longbow.cts_rate = cts_rate;
853 txhdr->longbow.output_power = cpu_to_le16(priv->output_power);
854 } else {
855 txhdr->normal.output_power = priv->output_power;
856 txhdr->normal.cts_rate = cts_rate;
857 }
858 if (padding)
859 txhdr->align[0] = padding;
860
861 hdr->len = cpu_to_le16(len);
862 /* modifies skb->cb and with it info, so must be last! */
863 p54info = (void *) info->rate_driver_data;
864 p54info->extra_len = extra_len;
865
866 p54_tx(priv, skb);
867 return NETDEV_TX_OK;
868}
Clone of davem's net-next-2.6 tree