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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[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);
c96c31e4
JP		 41 wiphy_debug(priv->hw->wiphy, "/ --- tx queue dump (%d entries) ---\n",
42 skb_queue_len(&priv->tx_queue));
0a5fb84f
CL		 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;
c96c31e4
JP		 51 wiphy_debug(priv->hw->wiphy,
52 "| [%02d] => [skb:%p skb_len:0x%04x "
53 "hdr:{flags:%02x len:%04x req_id:%04x type:%02x} "
54 "mem:{start:%04x end:%04x, free:%d}]\n",
55 i++, skb, skb->len,
56 le16_to_cpu(hdr->flags), le16_to_cpu(hdr->len),
57 le32_to_cpu(hdr->req_id), le16_to_cpu(hdr->type),
58 range->start_addr, range->end_addr, free);
0a5fb84f
CL		 59
60 prev_addr = range->end_addr;
61 largest_hole = max(largest_hole, free);
62 }
63 free = priv->rx_end - prev_addr;
64 largest_hole = max(largest_hole, free);
c96c31e4
JP		 65 wiphy_debug(priv->hw->wiphy,
66 "\\ --- [free: %d], largest free block: %d ---\n",
67 free, largest_hole);
0a5fb84f
CL		 68 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
69}
70#endif /* P54_MM_DEBUG */
71
72/*
73 * So, the firmware is somewhat stupid and doesn't know what places in its
74 * memory incoming data should go to. By poking around in the firmware, we
75 * can find some unused memory to upload our packets to. However, data that we
76 * want the card to TX needs to stay intact until the card has told us that
77 * it is done with it. This function finds empty places we can upload to and
78 * marks allocated areas as reserved if necessary. p54_find_and_unlink_skb or
79 * p54_free_skb frees allocated areas.
80 */
81static int p54_assign_address(struct p54_common *priv, struct sk_buff *skb)
82{
83 struct sk_buff *entry, *target_skb = NULL;
84 struct ieee80211_tx_info *info;
85 struct p54_tx_info *range;
86 struct p54_hdr *data = (void *) skb->data;
87 unsigned long flags;
88 u32 last_addr = priv->rx_start;
89 u32 target_addr = priv->rx_start;
90 u16 len = priv->headroom + skb->len + priv->tailroom + 3;
91
0a5fb84f
CL		 92 info = IEEE80211_SKB_CB(skb);
93 range = (void *) info->rate_driver_data;
94 len = (range->extra_len + len) & ~0x3;
95
96 spin_lock_irqsave(&priv->tx_queue.lock, flags);
97 if (unlikely(skb_queue_len(&priv->tx_queue) == 32)) {
98 /*
99 * The tx_queue is now really full.
100 *
101 * TODO: check if the device has crashed and reset it.
102 */
103 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
104 return -EBUSY;
105 }
106
107 skb_queue_walk(&priv->tx_queue, entry) {
108 u32 hole_size;
109 info = IEEE80211_SKB_CB(entry);
110 range = (void *) info->rate_driver_data;
111 hole_size = range->start_addr - last_addr;
112
0a5fb84f
CL		 113 if (!target_skb && hole_size >= len) {
114 target_skb = entry->prev;
115 hole_size -= len;
116 target_addr = last_addr;
117 break;
118 }
119 last_addr = range->end_addr;
120 }
121 if (unlikely(!target_skb)) {
122 if (priv->rx_end - last_addr >= len) {
123 target_skb = priv->tx_queue.prev;
124 if (!skb_queue_empty(&priv->tx_queue)) {
125 info = IEEE80211_SKB_CB(target_skb);
126 range = (void *)info->rate_driver_data;
127 target_addr = range->end_addr;
128 }
129 } else {
130 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
131 return -ENOSPC;
132 }
133 }
134
135 info = IEEE80211_SKB_CB(skb);
136 range = (void *) info->rate_driver_data;
137 range->start_addr = target_addr;
138 range->end_addr = target_addr + len;
46df10ae
CL		 139 data->req_id = cpu_to_le32(target_addr + priv->headroom);
140 if (IS_DATA_FRAME(skb) &&
141 unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON))
142 priv->beacon_req_id = data->req_id;
143
0a5fb84f
CL		 144 __skb_queue_after(&priv->tx_queue, target_skb, skb);
145 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
0a5fb84f
CL		 146 return 0;
147}
148
149static void p54_tx_pending(struct p54_common *priv)
150{
151 struct sk_buff *skb;
152 int ret;
153
0a5fb84f
CL		 154 skb = skb_dequeue(&priv->tx_pending);
155 if (unlikely(!skb))
156 return ;
157
158 ret = p54_assign_address(priv, skb);
159 if (unlikely(ret))
160 skb_queue_head(&priv->tx_pending, skb);
161 else
162 priv->tx(priv->hw, skb);
163}
164
165static void p54_wake_queues(struct p54_common *priv)
166{
167 unsigned long flags;
168 unsigned int i;
169
170 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
171 return ;
172
173 p54_tx_pending(priv);
174
175 spin_lock_irqsave(&priv->tx_stats_lock, flags);
176 for (i = 0; i < priv->hw->queues; i++) {
177 if (priv->tx_stats[i + P54_QUEUE_DATA].len <
178 priv->tx_stats[i + P54_QUEUE_DATA].limit)
179 ieee80211_wake_queue(priv->hw, i);
180 }
181 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
182}
183
184static int p54_tx_qos_accounting_alloc(struct p54_common *priv,
185 struct sk_buff *skb,
186 const u16 p54_queue)
187{
97e93fcd 188 struct p54_tx_queue_stats *queue;
0a5fb84f
CL		 189 unsigned long flags;
190
088ea189 191 if (WARN_ON(p54_queue >= P54_QUEUE_NUM))
0a5fb84f
CL		 192 return -EINVAL;
193
194 queue = &priv->tx_stats[p54_queue];
195
196 spin_lock_irqsave(&priv->tx_stats_lock, flags);
2ffa5fed 197 if (unlikely(queue->len >= queue->limit && IS_QOS_QUEUE(p54_queue))) {
0a5fb84f
CL		 198 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
199 return -ENOSPC;
200 }
201
202 queue->len++;
203 queue->count++;
204
205 if (unlikely(queue->len == queue->limit && IS_QOS_QUEUE(p54_queue))) {
206 u16 ac_queue = p54_queue - P54_QUEUE_DATA;
207 ieee80211_stop_queue(priv->hw, ac_queue);
208 }
209
210 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
211 return 0;
212}
213
214static void p54_tx_qos_accounting_free(struct p54_common *priv,
215 struct sk_buff *skb)
216{
12f49a79 217 if (IS_DATA_FRAME(skb)) {
2ffa5fed 218 unsigned long flags;
0a5fb84f 219
2ffa5fed 220 spin_lock_irqsave(&priv->tx_stats_lock, flags);
46df10ae 221 priv->tx_stats[GET_HW_QUEUE(skb)].len--;
2ffa5fed 222 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
46df10ae
CL		 223
224 if (unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON)) {
225 if (priv->beacon_req_id == GET_REQ_ID(skb)) {
226 /* this is the active beacon set anymore */
227 priv->beacon_req_id = 0;
228 }
229 complete(&priv->beacon_comp);
230 }
0a5fb84f
CL		 231 }
232 p54_wake_queues(priv);
233}
234
235void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
236{
237 struct p54_common *priv = dev->priv;
238 if (unlikely(!skb))
239 return ;
240
241 skb_unlink(skb, &priv->tx_queue);
242 p54_tx_qos_accounting_free(priv, skb);
243 dev_kfree_skb_any(skb);
244}
245EXPORT_SYMBOL_GPL(p54_free_skb);
246
247static struct sk_buff *p54_find_and_unlink_skb(struct p54_common *priv,
248 const __le32 req_id)
249{
250 struct sk_buff *entry;
251 unsigned long flags;
252
253 spin_lock_irqsave(&priv->tx_queue.lock, flags);
254 skb_queue_walk(&priv->tx_queue, entry) {
255 struct p54_hdr *hdr = (struct p54_hdr *) entry->data;
256
257 if (hdr->req_id == req_id) {
258 __skb_unlink(entry, &priv->tx_queue);
259 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
260 p54_tx_qos_accounting_free(priv, entry);
261 return entry;
262 }
263 }
264 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
265 return NULL;
266}
267
268void p54_tx(struct p54_common *priv, struct sk_buff *skb)
269{
0a5fb84f
CL		 270 skb_queue_tail(&priv->tx_pending, skb);
271 p54_tx_pending(priv);
272}
273
274static int p54_rssi_to_dbm(struct p54_common *priv, int rssi)
275{
276 int band = priv->hw->conf.channel->band;
277
278 if (priv->rxhw != 5)
279 return ((rssi * priv->rssical_db[band].mul) / 64 +
280 priv->rssical_db[band].add) / 4;
281 else
282 /*
283 * TODO: find the correct formula
284 */
285 return ((rssi * priv->rssical_db[band].mul) / 64 +
286 priv->rssical_db[band].add) / 4;
287}
288
e0f114e8
CL		 289/*
290 * Even if the firmware is capable of dealing with incoming traffic,
291 * while dozing, we have to prepared in case mac80211 uses PS-POLL
292 * to retrieve outstanding frames from our AP.
293 * (see comment in net/mac80211/mlme.c @ line 1993)
294 */
295static void p54_pspoll_workaround(struct p54_common *priv, struct sk_buff *skb)
296{
297 struct ieee80211_hdr *hdr = (void *) skb->data;
298 struct ieee80211_tim_ie *tim_ie;
299 u8 *tim;
300 u8 tim_len;
301 bool new_psm;
302
303 /* only beacons have a TIM IE */
304 if (!ieee80211_is_beacon(hdr->frame_control))
305 return;
306
307 if (!priv->aid)
308 return;
309
310 /* only consider beacons from the associated BSSID */
311 if (compare_ether_addr(hdr->addr3, priv->bssid))
312 return;
313
314 tim = p54_find_ie(skb, WLAN_EID_TIM);
315 if (!tim)
316 return;
317
318 tim_len = tim[1];
319 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
320
321 new_psm = ieee80211_check_tim(tim_ie, tim_len, priv->aid);
322 if (new_psm != priv->powersave_override) {
323 priv->powersave_override = new_psm;
324 p54_set_ps(priv);
325 }
326}
327
0a5fb84f
CL		 328static int p54_rx_data(struct p54_common *priv, struct sk_buff *skb)
329{
330 struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
331 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
332 u16 freq = le16_to_cpu(hdr->freq);
333 size_t header_len = sizeof(*hdr);
334 u32 tsf32;
335 u8 rate = hdr->rate & 0xf;
336
337 /*
338 * If the device is in a unspecified state we have to
339 * ignore all data frames. Else we could end up with a
340 * nasty crash.
341 */
342 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
343 return 0;
344
345 if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD)))
346 return 0;
347
348 if (hdr->decrypt_status == P54_DECRYPT_OK)
349 rx_status->flag |= RX_FLAG_DECRYPTED;
350 if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) ||
351 (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP))
352 rx_status->flag |= RX_FLAG_MMIC_ERROR;
353
354 rx_status->signal = p54_rssi_to_dbm(priv, hdr->rssi);
0a5fb84f
CL		 355 if (hdr->rate & 0x10)
356 rx_status->flag |= RX_FLAG_SHORTPRE;
357 if (priv->hw->conf.channel->band == IEEE80211_BAND_5GHZ)
358 rx_status->rate_idx = (rate < 4) ? 0 : rate - 4;
359 else
360 rx_status->rate_idx = rate;
361
362 rx_status->freq = freq;
363 rx_status->band = priv->hw->conf.channel->band;
364 rx_status->antenna = hdr->antenna;
365
366 tsf32 = le32_to_cpu(hdr->tsf32);
367 if (tsf32 < priv->tsf_low32)
368 priv->tsf_high32++;
369 rx_status->mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
370 priv->tsf_low32 = tsf32;
371
372 rx_status->flag |= RX_FLAG_TSFT;
373
374 if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
375 header_len += hdr->align[0];
376
377 skb_pull(skb, header_len);
378 skb_trim(skb, le16_to_cpu(hdr->len));
e0f114e8
CL		 379 if (unlikely(priv->hw->conf.flags & IEEE80211_CONF_PS))
380 p54_pspoll_workaround(priv, skb);
381
0a5fb84f
CL		 382 ieee80211_rx_irqsafe(priv->hw, skb);
383
42935eca 384 ieee80211_queue_delayed_work(priv->hw, &priv->work,
0a5fb84f
CL		 385 msecs_to_jiffies(P54_STATISTICS_UPDATE));
386
387 return -1;
388}
389
390static void p54_rx_frame_sent(struct p54_common *priv, struct sk_buff *skb)
391{
392 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
393 struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
394 struct ieee80211_tx_info *info;
395 struct p54_hdr *entry_hdr;
396 struct p54_tx_data *entry_data;
397 struct sk_buff *entry;
398 unsigned int pad = 0, frame_len;
399 int count, idx;
400
401 entry = p54_find_and_unlink_skb(priv, hdr->req_id);
402 if (unlikely(!entry))
403 return ;
404
405 frame_len = entry->len;
406 info = IEEE80211_SKB_CB(entry);
407 entry_hdr = (struct p54_hdr *) entry->data;
408 entry_data = (struct p54_tx_data *) entry_hdr->data;
409 priv->stats.dot11ACKFailureCount += payload->tries - 1;
410
411 /*
412 * Frames in P54_QUEUE_FWSCAN and P54_QUEUE_BEACON are
413 * generated by the driver. Therefore tx_status is bogus
414 * and we don't want to confuse the mac80211 stack.
415 */
416 if (unlikely(entry_data->hw_queue < P54_QUEUE_FWSCAN)) {
0a5fb84f
CL		 417 dev_kfree_skb_any(entry);
418 return ;
419 }
420
421 /*
422 * Clear manually, ieee80211_tx_info_clear_status would
423 * clear the counts too and we need them.
424 */
425 memset(&info->status.ampdu_ack_len, 0,
426 sizeof(struct ieee80211_tx_info) -
427 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
428 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
429 status.ampdu_ack_len) != 23);
430
431 if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
432 pad = entry_data->align[0];
433
434 /* walk through the rates array and adjust the counts */
435 count = payload->tries;
436 for (idx = 0; idx < 4; idx++) {
437 if (count >= info->status.rates[idx].count) {
438 count -= info->status.rates[idx].count;
439 } else if (count > 0) {
440 info->status.rates[idx].count = count;
441 count = 0;
442 } else {
443 info->status.rates[idx].idx = -1;
444 info->status.rates[idx].count = 0;
445 }
446 }
447
448 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
f880c205 449 !(payload->status & P54_TX_FAILED))
0a5fb84f
CL		 450 info->flags |= IEEE80211_TX_STAT_ACK;
451 if (payload->status & P54_TX_PSM_CANCELLED)
452 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
453 info->status.ack_signal = p54_rssi_to_dbm(priv,
454 (int)payload->ack_rssi);
455
456 /* Undo all changes to the frame. */
457 switch (entry_data->key_type) {
458 case P54_CRYPTO_TKIPMICHAEL: {
459 u8 *iv = (u8 *)(entry_data->align + pad +
460 entry_data->crypt_offset);
461
462 /* Restore the original TKIP IV. */
463 iv[2] = iv[0];
464 iv[0] = iv[1];
465 iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */
466
467 frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */
468 break;
469 }
470 case P54_CRYPTO_AESCCMP:
471 frame_len -= 8; /* remove CCMP_MIC */
472 break;
473 case P54_CRYPTO_WEP:
474 frame_len -= 4; /* remove WEP_ICV */
475 break;
476 }
477
478 skb_trim(entry, frame_len);
479 skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
480 ieee80211_tx_status_irqsafe(priv->hw, entry);
481}
482
483static void p54_rx_eeprom_readback(struct p54_common *priv,
484 struct sk_buff *skb)
485{
486 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
487 struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
488 struct sk_buff *tmp;
489
490 if (!priv->eeprom)
491 return ;
492
493 if (priv->fw_var >= 0x509) {
494 memcpy(priv->eeprom, eeprom->v2.data,
495 le16_to_cpu(eeprom->v2.len));
496 } else {
497 memcpy(priv->eeprom, eeprom->v1.data,
498 le16_to_cpu(eeprom->v1.len));
499 }
500
501 priv->eeprom = NULL;
502 tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
0a5fb84f
CL		 503 dev_kfree_skb_any(tmp);
504 complete(&priv->eeprom_comp);
505}
506
507static void p54_rx_stats(struct p54_common *priv, struct sk_buff *skb)
508{
509 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
510 struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
511 struct sk_buff *tmp;
512 u32 tsf32;
513
514 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
515 return ;
516
517 tsf32 = le32_to_cpu(stats->tsf32);
518 if (tsf32 < priv->tsf_low32)
519 priv->tsf_high32++;
520 priv->tsf_low32 = tsf32;
521
522 priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
523 priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
524 priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
525
526 priv->noise = p54_rssi_to_dbm(priv, le32_to_cpu(stats->noise));
527
528 tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
0a5fb84f
CL		 529 dev_kfree_skb_any(tmp);
530}
531
532static void p54_rx_trap(struct p54_common *priv, struct sk_buff *skb)
533{
534 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
535 struct p54_trap *trap = (struct p54_trap *) hdr->data;
536 u16 event = le16_to_cpu(trap->event);
537 u16 freq = le16_to_cpu(trap->frequency);
538
539 switch (event) {
540 case P54_TRAP_BEACON_TX:
541 break;
542 case P54_TRAP_RADAR:
5db55844 543 wiphy_info(priv->hw->wiphy, "radar (freq:%d MHz)\n", freq);
0a5fb84f
CL		 544 break;
545 case P54_TRAP_NO_BEACON:
546 if (priv->vif)
547 ieee80211_beacon_loss(priv->vif);
548 break;
549 case P54_TRAP_SCAN:
550 break;
551 case P54_TRAP_TBTT:
552 break;
553 case P54_TRAP_TIMER:
554 break;
6208f8b2
CL		 555 case P54_TRAP_FAA_RADIO_OFF:
556 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
557 break;
558 case P54_TRAP_FAA_RADIO_ON:
559 wiphy_rfkill_set_hw_state(priv->hw->wiphy, false);
560 break;
0a5fb84f 561 default:
c96c31e4
JP		 562 wiphy_info(priv->hw->wiphy, "received event:%x freq:%d\n",
563 event, freq);
0a5fb84f
CL		 564 break;
565 }
566}
567
568static int p54_rx_control(struct p54_common *priv, struct sk_buff *skb)
569{
570 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
571
572 switch (le16_to_cpu(hdr->type)) {
573 case P54_CONTROL_TYPE_TXDONE:
574 p54_rx_frame_sent(priv, skb);
575 break;
576 case P54_CONTROL_TYPE_TRAP:
577 p54_rx_trap(priv, skb);
578 break;
579 case P54_CONTROL_TYPE_BBP:
580 break;
581 case P54_CONTROL_TYPE_STAT_READBACK:
582 p54_rx_stats(priv, skb);
583 break;
584 case P54_CONTROL_TYPE_EEPROM_READBACK:
585 p54_rx_eeprom_readback(priv, skb);
586 break;
587 default:
c96c31e4
JP		 588 wiphy_debug(priv->hw->wiphy,
589 "not handling 0x%02x type control frame\n",
590 le16_to_cpu(hdr->type));
0a5fb84f
CL		 591 break;
592 }
593 return 0;
594}
595
596/* returns zero if skb can be reused */
597int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
598{
599 struct p54_common *priv = dev->priv;
600 u16 type = le16_to_cpu(*((__le16 *)skb->data));
601
602 if (type & P54_HDR_FLAG_CONTROL)
603 return p54_rx_control(priv, skb);
604 else
605 return p54_rx_data(priv, skb);
606}
607EXPORT_SYMBOL_GPL(p54_rx);
608
609static void p54_tx_80211_header(struct p54_common *priv, struct sk_buff *skb,
610 struct ieee80211_tx_info *info, u8 *queue,
611 u32 *extra_len, u16 *flags, u16 *aid,
612 bool *burst_possible)
613{
614 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
615
616 if (ieee80211_is_data_qos(hdr->frame_control))
617 *burst_possible = true;
618 else
619 *burst_possible = false;
620
621 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
622 *flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
623
3fa52056 624 if (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)
0a5fb84f
CL		 625 *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
626
90d6f928
CL		 627 if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
628 *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
629
0a5fb84f
CL		 630 *queue = skb_get_queue_mapping(skb) + P54_QUEUE_DATA;
631
632 switch (priv->mode) {
633 case NL80211_IFTYPE_MONITOR:
634 /*
635 * We have to set P54_HDR_FLAG_DATA_OUT_PROMISC for
636 * every frame in promiscuous/monitor mode.
637 * see STSW45x0C LMAC API - page 12.
638 */
639 *aid = 0;
640 *flags |= P54_HDR_FLAG_DATA_OUT_PROMISC;
641 break;
642 case NL80211_IFTYPE_STATION:
643 *aid = 1;
644 break;
645 case NL80211_IFTYPE_AP:
646 case NL80211_IFTYPE_ADHOC:
647 case NL80211_IFTYPE_MESH_POINT:
648 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
649 *aid = 0;
650 *queue = P54_QUEUE_CAB;
651 return;
652 }
653
654 if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
655 if (ieee80211_is_probe_resp(hdr->frame_control)) {
656 *aid = 0;
657 *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
658 P54_HDR_FLAG_DATA_OUT_NOCANCEL;
659 return;
660 } else if (ieee80211_is_beacon(hdr->frame_control)) {
661 *aid = 0;
662
663 if (info->flags & IEEE80211_TX_CTL_INJECTED) {
664 /*
665 * Injecting beacons on top of a AP is
666 * not a good idea... nevertheless,
667 * it should be doable.
668 */
669
670 return;
671 }
672
673 *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
674 *queue = P54_QUEUE_BEACON;
675 *extra_len = IEEE80211_MAX_TIM_LEN;
676 return;
677 }
678 }
679
680 if (info->control.sta)
681 *aid = info->control.sta->aid;
682 break;
683 }
684}
685
686static u8 p54_convert_algo(enum ieee80211_key_alg alg)
687{
688 switch (alg) {
689 case ALG_WEP:
690 return P54_CRYPTO_WEP;
691 case ALG_TKIP:
692 return P54_CRYPTO_TKIPMICHAEL;
693 case ALG_CCMP:
694 return P54_CRYPTO_AESCCMP;
695 default:
696 return 0;
697 }
698}
699
700int p54_tx_80211(struct ieee80211_hw *dev, struct sk_buff *skb)
701{
702 struct p54_common *priv = dev->priv;
703 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
704 struct p54_tx_info *p54info;
705 struct p54_hdr *hdr;
706 struct p54_tx_data *txhdr;
707 unsigned int padding, len, extra_len;
708 int i, j, ridx;
709 u16 hdr_flags = 0, aid = 0;
710 u8 rate, queue = 0, crypt_offset = 0;
711 u8 cts_rate = 0x20;
712 u8 rc_flags;
713 u8 calculated_tries[4];
714 u8 nrates = 0, nremaining = 8;
715 bool burst_allowed = false;
716
717 p54_tx_80211_header(priv, skb, info, &queue, &extra_len,
718 &hdr_flags, &aid, &burst_allowed);
719
720 if (p54_tx_qos_accounting_alloc(priv, skb, queue)) {
721 if (!IS_QOS_QUEUE(queue)) {
722 dev_kfree_skb_any(skb);
723 return NETDEV_TX_OK;
724 } else {
725 return NETDEV_TX_BUSY;
726 }
727 }
728
729 padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
730 len = skb->len;
731
732 if (info->control.hw_key) {
733 crypt_offset = ieee80211_get_hdrlen_from_skb(skb);
734 if (info->control.hw_key->alg == ALG_TKIP) {
735 u8 *iv = (u8 *)(skb->data + crypt_offset);
736 /*
737 * The firmware excepts that the IV has to have
738 * this special format
739 */
740 iv[1] = iv[0];
741 iv[0] = iv[2];
742 iv[2] = 0;
743 }
744 }
745
746 txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
747 hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
748
749 if (padding)
750 hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
751 hdr->type = cpu_to_le16(aid);
752 hdr->rts_tries = info->control.rates[0].count;
753
754 /*
755 * we register the rates in perfect order, and
756 * RTS/CTS won't happen on 5 GHz
757 */
758 cts_rate = info->control.rts_cts_rate_idx;
759
760 memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
761
762 /* see how many rates got used */
763 for (i = 0; i < dev->max_rates; i++) {
764 if (info->control.rates[i].idx < 0)
765 break;
766 nrates++;
767 }
768
769 /* limit tries to 8/nrates per rate */
770 for (i = 0; i < nrates; i++) {
771 /*
772 * The magic expression here is equivalent to 8/nrates for
773 * all values that matter, but avoids division and jumps.
774 * Note that nrates can only take the values 1 through 4.
775 */
776 calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
777 info->control.rates[i].count);
778 nremaining -= calculated_tries[i];
779 }
780
781 /* if there are tries left, distribute from back to front */
782 for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
783 int tmp = info->control.rates[i].count - calculated_tries[i];
784
785 if (tmp <= 0)
786 continue;
787 /* RC requested more tries at this rate */
788
789 tmp = min_t(int, tmp, nremaining);
790 calculated_tries[i] += tmp;
791 nremaining -= tmp;
792 }
793
794 ridx = 0;
795 for (i = 0; i < nrates && ridx < 8; i++) {
796 /* we register the rates in perfect order */
797 rate = info->control.rates[i].idx;
798 if (info->band == IEEE80211_BAND_5GHZ)
799 rate += 4;
800
801 /* store the count we actually calculated for TX status */
802 info->control.rates[i].count = calculated_tries[i];
803
804 rc_flags = info->control.rates[i].flags;
805 if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
806 rate |= 0x10;
807 cts_rate |= 0x10;
808 }
809 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
810 burst_allowed = false;
811 rate |= 0x40;
812 } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
813 rate |= 0x20;
814 burst_allowed = false;
815 }
816 for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
817 txhdr->rateset[ridx] = rate;
818 ridx++;
819 }
820 }
821
822 if (burst_allowed)
823 hdr_flags |= P54_HDR_FLAG_DATA_OUT_BURST;
824
825 /* TODO: enable bursting */
826 hdr->flags = cpu_to_le16(hdr_flags);
827 hdr->tries = ridx;
828 txhdr->rts_rate_idx = 0;
829 if (info->control.hw_key) {
830 txhdr->key_type = p54_convert_algo(info->control.hw_key->alg);
831 txhdr->key_len = min((u8)16, info->control.hw_key->keylen);
832 memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len);
833 if (info->control.hw_key->alg == ALG_TKIP) {
834 /* reserve space for the MIC key */
835 len += 8;
836 memcpy(skb_put(skb, 8), &(info->control.hw_key->key
837 [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8);
838 }
839 /* reserve some space for ICV */
840 len += info->control.hw_key->icv_len;
841 memset(skb_put(skb, info->control.hw_key->icv_len), 0,
842 info->control.hw_key->icv_len);
843 } else {
844 txhdr->key_type = 0;
845 txhdr->key_len = 0;
846 }
847 txhdr->crypt_offset = crypt_offset;
848 txhdr->hw_queue = queue;
849 txhdr->backlog = priv->tx_stats[queue].len - 1;
850 memset(txhdr->durations, 0, sizeof(txhdr->durations));
851 txhdr->tx_antenna = ((info->antenna_sel_tx == 0) ?
852 2 : info->antenna_sel_tx - 1) & priv->tx_diversity_mask;
853 if (priv->rxhw == 5) {
854 txhdr->longbow.cts_rate = cts_rate;
855 txhdr->longbow.output_power = cpu_to_le16(priv->output_power);
856 } else {
857 txhdr->normal.output_power = priv->output_power;
858 txhdr->normal.cts_rate = cts_rate;
859 }
860 if (padding)
861 txhdr->align[0] = padding;
862
863 hdr->len = cpu_to_le16(len);
864 /* modifies skb->cb and with it info, so must be last! */
865 p54info = (void *) info->rate_driver_data;
866 p54info->extra_len = extra_len;
867
868 p54_tx(priv, skb);
869 return NETDEV_TX_OK;
870}
Clone of davem's net-next-2.6 tree