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26#include <linux/etherdevice.h>
27#include "device.h"
28#include "rxtx.h"
29#include "card.h"
30#include "mac.h"
31#include "rf.h"
32#include "usbpipe.h"
33
34static const u16 vnt_time_stampoff[2][MAX_RATE] = {
35
36 {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},
37
38
39 {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},
40};
41
42static const u16 vnt_fb_opt0[2][5] = {
43 {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M},
44 {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M},
45};
46
47static const u16 vnt_fb_opt1[2][5] = {
48 {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M},
49 {RATE_6M, RATE_6M, RATE_12M, RATE_12M, RATE_18M},
50};
51
52#define RTSDUR_BB 0
53#define RTSDUR_BA 1
54#define RTSDUR_AA 2
55#define CTSDUR_BA 3
56#define RTSDUR_BA_F0 4
57#define RTSDUR_AA_F0 5
58#define RTSDUR_BA_F1 6
59#define RTSDUR_AA_F1 7
60#define CTSDUR_BA_F0 8
61#define CTSDUR_BA_F1 9
62#define DATADUR_B 10
63#define DATADUR_A 11
64#define DATADUR_A_F0 12
65#define DATADUR_A_F1 13
66
67static struct vnt_usb_send_context
68 *vnt_get_free_context(struct vnt_private *priv)
69{
70 struct vnt_usb_send_context *context = NULL;
71 int ii;
72
73 dev_dbg(&priv->usb->dev, "%s\n", __func__);
74
75 for (ii = 0; ii < priv->num_tx_context; ii++) {
76 if (!priv->tx_context[ii])
77 return NULL;
78
79 context = priv->tx_context[ii];
80 if (!context->in_use) {
81 context->in_use = true;
82 memset(context->data, 0,
83 MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
84
85 context->hdr = NULL;
86
87 return context;
88 }
89 }
90
91 if (ii == priv->num_tx_context) {
92 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
93
94 ieee80211_stop_queues(priv->hw);
95 }
96
97 return NULL;
98}
99
100static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
101{
102 return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
103 [rate % MAX_RATE]);
104}
105
106static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
107 u32 frame_length, u16 rate, int need_ack)
108{
109 u32 data_time, ack_time;
110
111 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
112 frame_length, rate);
113
114 if (pkt_type == PK_TYPE_11B)
115 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
116 14, (u16)priv->top_cck_basic_rate);
117 else
118 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
119 14, (u16)priv->top_ofdm_basic_rate);
120
121 if (need_ack)
122 return data_time + priv->sifs + ack_time;
123
124 return data_time;
125}
126
127static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
128 u32 frame_length, u16 rate, int need_ack)
129{
130 return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
131 frame_length, rate, need_ack));
132}
133
134static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv, u8 rsv_type,
135 u8 pkt_type, u32 frame_length,
136 u16 current_rate)
137{
138 u32 rrv_time, rts_time, cts_time, ack_time, data_time;
139
140 rrv_time = 0;
141 rts_time = 0;
142 cts_time = 0;
143 ack_time = 0;
144
145 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
146 frame_length, current_rate);
147
148 if (rsv_type == 0) {
149 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
150 20, priv->top_cck_basic_rate);
151 ack_time = vnt_get_frame_time(priv->preamble_type,
152 pkt_type, 14,
153 priv->top_cck_basic_rate);
154 cts_time = ack_time;
155
156 } else if (rsv_type == 1) {
157 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
158 20, priv->top_cck_basic_rate);
159 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
160 14, priv->top_cck_basic_rate);
161 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
162 14, priv->top_ofdm_basic_rate);
163 } else if (rsv_type == 2) {
164 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
165 20, priv->top_ofdm_basic_rate);
166 ack_time = vnt_get_frame_time(priv->preamble_type,
167 pkt_type, 14,
168 priv->top_ofdm_basic_rate);
169 cts_time = ack_time;
170
171 } else if (rsv_type == 3) {
172 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
173 14, priv->top_cck_basic_rate);
174 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
175 14, priv->top_ofdm_basic_rate);
176
177 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
178
179 return cpu_to_le16((u16)rrv_time);
180 }
181
182 rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
183
184 return cpu_to_le16((u16)rrv_time);
185}
186
187static __le16 vnt_get_duration_le(struct vnt_private *priv, u8 pkt_type,
188 int need_ack)
189{
190 u32 ack_time = 0;
191
192 if (need_ack) {
193 if (pkt_type == PK_TYPE_11B)
194 ack_time = vnt_get_frame_time(priv->preamble_type,
195 pkt_type, 14,
196 priv->top_cck_basic_rate);
197 else
198 ack_time = vnt_get_frame_time(priv->preamble_type,
199 pkt_type, 14,
200 priv->top_ofdm_basic_rate);
201
202 return cpu_to_le16((u16)(priv->sifs + ack_time));
203 }
204
205 return 0;
206}
207
208static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
209 u8 dur_type, u8 pkt_type, u16 rate)
210{
211 struct vnt_private *priv = context->priv;
212 u32 cts_time = 0, dur_time = 0;
213 u32 frame_length = context->frame_len;
214 u8 need_ack = context->need_ack;
215
216 switch (dur_type) {
217 case RTSDUR_BB:
218 case RTSDUR_BA:
219 case RTSDUR_BA_F0:
220 case RTSDUR_BA_F1:
221 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
222 14, priv->top_cck_basic_rate);
223 dur_time = cts_time + 2 * priv->sifs +
224 vnt_get_rsvtime(priv, pkt_type,
225 frame_length, rate, need_ack);
226 break;
227
228 case RTSDUR_AA:
229 case RTSDUR_AA_F0:
230 case RTSDUR_AA_F1:
231 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
232 14, priv->top_ofdm_basic_rate);
233 dur_time = cts_time + 2 * priv->sifs +
234 vnt_get_rsvtime(priv, pkt_type,
235 frame_length, rate, need_ack);
236 break;
237
238 case CTSDUR_BA:
239 case CTSDUR_BA_F0:
240 case CTSDUR_BA_F1:
241 dur_time = priv->sifs + vnt_get_rsvtime(priv,
242 pkt_type, frame_length, rate, need_ack);
243 break;
244
245 default:
246 break;
247 }
248
249 return cpu_to_le16((u16)dur_time);
250}
251
252static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
253 struct ieee80211_hdr *hdr)
254{
255 u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
256 u8 *hdr_pos = (u8 *)hdr;
257
258 tx_context->hdr = hdr;
259 if (!tx_context->hdr)
260 return 0;
261
262 return (u16)(hdr_pos - head);
263}
264
265static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
266 struct vnt_tx_datahead_g *buf)
267{
268 struct vnt_private *priv = tx_context->priv;
269 struct ieee80211_hdr *hdr =
270 (struct ieee80211_hdr *)tx_context->skb->data;
271 u32 frame_len = tx_context->frame_len;
272 u16 rate = tx_context->tx_rate;
273 u8 need_ack = tx_context->need_ack;
274
275
276 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
277 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
278 PK_TYPE_11B, &buf->b);
279
280
281 if (ieee80211_is_pspoll(hdr->frame_control)) {
282 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
283
284 buf->duration_a = dur;
285 buf->duration_b = dur;
286 } else {
287 buf->duration_a = vnt_get_duration_le(priv,
288 tx_context->pkt_type, need_ack);
289 buf->duration_b = vnt_get_duration_le(priv,
290 PK_TYPE_11B, need_ack);
291 }
292
293 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
294 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
295 priv->top_cck_basic_rate);
296
297 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
298
299 return le16_to_cpu(buf->duration_a);
300}
301
302static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
303 struct vnt_tx_datahead_g_fb *buf)
304{
305 struct vnt_private *priv = tx_context->priv;
306 u32 frame_len = tx_context->frame_len;
307 u16 rate = tx_context->tx_rate;
308 u8 need_ack = tx_context->need_ack;
309
310
311 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
312
313 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
314 PK_TYPE_11B, &buf->b);
315
316
317 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
318 need_ack);
319 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
320
321 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
322 need_ack);
323 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
324 need_ack);
325
326 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
327 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
328 priv->top_cck_basic_rate);
329
330 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
331
332 return le16_to_cpu(buf->duration_a);
333}
334
335static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
336 struct vnt_tx_datahead_a_fb *buf)
337{
338 struct vnt_private *priv = tx_context->priv;
339 u16 rate = tx_context->tx_rate;
340 u8 pkt_type = tx_context->pkt_type;
341 u8 need_ack = tx_context->need_ack;
342 u32 frame_len = tx_context->frame_len;
343
344
345 vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
346
347 buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
348
349 buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
350 buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
351
352 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
353
354 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
355
356 return le16_to_cpu(buf->duration);
357}
358
359static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
360 struct vnt_tx_datahead_ab *buf)
361{
362 struct vnt_private *priv = tx_context->priv;
363 struct ieee80211_hdr *hdr =
364 (struct ieee80211_hdr *)tx_context->skb->data;
365 u32 frame_len = tx_context->frame_len;
366 u16 rate = tx_context->tx_rate;
367 u8 need_ack = tx_context->need_ack;
368
369
370 vnt_get_phy_field(priv, frame_len, rate,
371 tx_context->pkt_type, &buf->ab);
372
373
374 if (ieee80211_is_pspoll(hdr->frame_control)) {
375 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
376
377 buf->duration = dur;
378 } else {
379 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
380 need_ack);
381 }
382
383 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
384
385 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
386
387 return le16_to_cpu(buf->duration);
388}
389
390static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
391 struct ieee80211_rts *rts, __le16 duration)
392{
393 struct ieee80211_hdr *hdr =
394 (struct ieee80211_hdr *)tx_context->skb->data;
395
396 rts->duration = duration;
397 rts->frame_control =
398 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
399
400 ether_addr_copy(rts->ra, hdr->addr1);
401 ether_addr_copy(rts->ta, hdr->addr2);
402
403 return 0;
404}
405
406static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
407 struct vnt_rts_g *buf)
408{
409 struct vnt_private *priv = tx_context->priv;
410 u16 rts_frame_len = 20;
411 u16 current_rate = tx_context->tx_rate;
412
413 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
414 PK_TYPE_11B, &buf->b);
415 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
416 tx_context->pkt_type, &buf->a);
417
418 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
419 PK_TYPE_11B,
420 priv->top_cck_basic_rate);
421 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
422 tx_context->pkt_type,
423 current_rate);
424 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
425 tx_context->pkt_type,
426 current_rate);
427
428 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
429
430 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
431}
432
433static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
434 struct vnt_rts_g_fb *buf)
435{
436 struct vnt_private *priv = tx_context->priv;
437 u16 current_rate = tx_context->tx_rate;
438 u16 rts_frame_len = 20;
439
440 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
441 PK_TYPE_11B, &buf->b);
442 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
443 tx_context->pkt_type, &buf->a);
444
445 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
446 PK_TYPE_11B,
447 priv->top_cck_basic_rate);
448 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
449 tx_context->pkt_type,
450 current_rate);
451 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
452 tx_context->pkt_type,
453 current_rate);
454
455 buf->rts_duration_ba_f0 =
456 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
457 tx_context->pkt_type,
458 priv->tx_rate_fb0);
459 buf->rts_duration_aa_f0 =
460 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
461 tx_context->pkt_type,
462 priv->tx_rate_fb0);
463 buf->rts_duration_ba_f1 =
464 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
465 tx_context->pkt_type,
466 priv->tx_rate_fb1);
467 buf->rts_duration_aa_f1 =
468 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
469 tx_context->pkt_type,
470 priv->tx_rate_fb1);
471
472 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
473
474 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
475}
476
477static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
478 struct vnt_rts_ab *buf)
479{
480 struct vnt_private *priv = tx_context->priv;
481 u16 current_rate = tx_context->tx_rate;
482 u16 rts_frame_len = 20;
483
484 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
485 tx_context->pkt_type, &buf->ab);
486
487 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
488 tx_context->pkt_type,
489 current_rate);
490
491 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
492
493 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
494}
495
496static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
497 struct vnt_rts_a_fb *buf)
498{
499 struct vnt_private *priv = tx_context->priv;
500 u16 current_rate = tx_context->tx_rate;
501 u16 rts_frame_len = 20;
502
503 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
504 tx_context->pkt_type, &buf->a);
505
506 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
507 tx_context->pkt_type,
508 current_rate);
509
510 buf->rts_duration_f0 =
511 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
512 tx_context->pkt_type,
513 priv->tx_rate_fb0);
514
515 buf->rts_duration_f1 =
516 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
517 tx_context->pkt_type,
518 priv->tx_rate_fb1);
519
520 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
521
522 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
523}
524
525static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
526 union vnt_tx_data_head *head)
527{
528 struct vnt_private *priv = tx_context->priv;
529 struct vnt_cts_fb *buf = &head->cts_g_fb;
530 u32 cts_frame_len = 14;
531 u16 current_rate = tx_context->tx_rate;
532
533
534 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
535 PK_TYPE_11B, &buf->b);
536
537 buf->duration_ba =
538 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
539 tx_context->pkt_type,
540 current_rate);
541
542 buf->cts_duration_ba_f0 =
543 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
544 tx_context->pkt_type,
545 priv->tx_rate_fb0);
546
547 buf->cts_duration_ba_f1 =
548 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
549 tx_context->pkt_type,
550 priv->tx_rate_fb1);
551
552 buf->data.duration = buf->duration_ba;
553 buf->data.frame_control =
554 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
555
556 ether_addr_copy(buf->data.ra, priv->current_net_addr);
557
558 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
559}
560
561static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
562 union vnt_tx_data_head *head)
563{
564 struct vnt_private *priv = tx_context->priv;
565 struct vnt_cts *buf = &head->cts_g;
566 u32 cts_frame_len = 14;
567 u16 current_rate = tx_context->tx_rate;
568
569
570 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
571 PK_TYPE_11B, &buf->b);
572
573 buf->duration_ba =
574 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
575 tx_context->pkt_type,
576 current_rate);
577
578 buf->data.duration = buf->duration_ba;
579 buf->data.frame_control =
580 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
581
582 ether_addr_copy(buf->data.ra, priv->current_net_addr);
583
584 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
585}
586
587static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
588 union vnt_tx_head *tx_head, bool need_mic)
589{
590 struct vnt_private *priv = tx_context->priv;
591 struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
592 union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
593 u32 frame_len = tx_context->frame_len;
594 u16 current_rate = tx_context->tx_rate;
595 u8 need_ack = tx_context->need_ack;
596
597 buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
598 tx_context->pkt_type, frame_len, current_rate);
599 buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
600 tx_context->pkt_type, frame_len, current_rate);
601 buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
602 tx_context->pkt_type, frame_len, current_rate);
603
604 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
605 frame_len, current_rate,
606 need_ack);
607 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
608 priv->top_cck_basic_rate, need_ack);
609
610 if (need_mic)
611 head = &tx_head->tx_rts.tx.mic.head;
612
613 if (tx_context->fb_option)
614 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
615
616 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
617}
618
619static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
620 union vnt_tx_head *tx_head, bool need_mic)
621{
622 struct vnt_private *priv = tx_context->priv;
623 struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
624 union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
625 u32 frame_len = tx_context->frame_len;
626 u16 current_rate = tx_context->tx_rate;
627 u8 need_ack = tx_context->need_ack;
628
629 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
630 frame_len, current_rate, need_ack);
631 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
632 frame_len, priv->top_cck_basic_rate, need_ack);
633
634 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
635 tx_context->pkt_type, frame_len, current_rate);
636
637 if (need_mic)
638 head = &tx_head->tx_cts.tx.mic.head;
639
640
641 if (tx_context->fb_option)
642 return vnt_fill_cts_fb_head(tx_context, head);
643
644 return vnt_fill_cts_head(tx_context, head);
645}
646
647static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
648 union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
649{
650 struct vnt_private *priv = tx_context->priv;
651 struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
652 union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
653 u32 frame_len = tx_context->frame_len;
654 u16 current_rate = tx_context->tx_rate;
655 u8 need_ack = tx_context->need_ack;
656
657 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
658 frame_len, current_rate, need_ack);
659
660 if (need_mic)
661 head = &tx_head->tx_ab.tx.mic.head;
662
663 if (need_rts) {
664 if (tx_context->pkt_type == PK_TYPE_11B)
665 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
666 tx_context->pkt_type, frame_len, current_rate);
667 else
668 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
669 tx_context->pkt_type, frame_len, current_rate);
670
671 if (tx_context->fb_option &&
672 tx_context->pkt_type == PK_TYPE_11A)
673 return vnt_rxtx_rts_a_fb_head(tx_context,
674 &head->rts_a_fb);
675
676 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
677 }
678
679 if (tx_context->pkt_type == PK_TYPE_11A)
680 return vnt_rxtx_datahead_a_fb(tx_context,
681 &head->data_head_a_fb);
682
683 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
684}
685
686static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
687 struct vnt_tx_buffer *tx_buffer,
688 struct vnt_mic_hdr **mic_hdr, u32 need_mic,
689 bool need_rts)
690{
691 if (tx_context->pkt_type == PK_TYPE_11GB ||
692 tx_context->pkt_type == PK_TYPE_11GA) {
693 if (need_rts) {
694 if (need_mic)
695 *mic_hdr =
696 &tx_buffer->tx_head.tx_rts.tx.mic.hdr;
697
698 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
699 need_mic);
700 }
701
702 if (need_mic)
703 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
704
705 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
706 }
707
708 if (need_mic)
709 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
710
711 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
712}
713
714static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
715 u8 *key_buffer, struct ieee80211_key_conf *tx_key,
716 struct sk_buff *skb, u16 payload_len,
717 struct vnt_mic_hdr *mic_hdr)
718{
719 struct ieee80211_hdr *hdr = tx_context->hdr;
720 u64 pn64;
721 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
722
723
724 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
725 payload_len -= tx_key->icv_len;
726
727 switch (tx_key->cipher) {
728 case WLAN_CIPHER_SUITE_WEP40:
729 case WLAN_CIPHER_SUITE_WEP104:
730 memcpy(key_buffer, iv, 3);
731 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
732
733 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
734 memcpy(key_buffer + 8, iv, 3);
735 memcpy(key_buffer + 11,
736 tx_key->key, WLAN_KEY_LEN_WEP40);
737 }
738
739 break;
740 case WLAN_CIPHER_SUITE_TKIP:
741 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
742
743 break;
744 case WLAN_CIPHER_SUITE_CCMP:
745
746 if (!mic_hdr)
747 return;
748
749 mic_hdr->id = 0x59;
750 mic_hdr->payload_len = cpu_to_be16(payload_len);
751 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
752
753 pn64 = atomic64_read(&tx_key->tx_pn);
754 mic_hdr->ccmp_pn[5] = pn64;
755 mic_hdr->ccmp_pn[4] = pn64 >> 8;
756 mic_hdr->ccmp_pn[3] = pn64 >> 16;
757 mic_hdr->ccmp_pn[2] = pn64 >> 24;
758 mic_hdr->ccmp_pn[1] = pn64 >> 32;
759 mic_hdr->ccmp_pn[0] = pn64 >> 40;
760
761 if (ieee80211_has_a4(hdr->frame_control))
762 mic_hdr->hlen = cpu_to_be16(28);
763 else
764 mic_hdr->hlen = cpu_to_be16(22);
765
766 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
767 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
768 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
769
770 mic_hdr->frame_control = cpu_to_le16(
771 le16_to_cpu(hdr->frame_control) & 0xc78f);
772 mic_hdr->seq_ctrl = cpu_to_le16(
773 le16_to_cpu(hdr->seq_ctrl) & 0xf);
774
775 if (ieee80211_has_a4(hdr->frame_control))
776 ether_addr_copy(mic_hdr->addr4, hdr->addr4);
777
778 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
779
780 break;
781 default:
782 break;
783 }
784}
785
786int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
787{
788 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
789 struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
790 struct ieee80211_rate *rate;
791 struct ieee80211_key_conf *tx_key;
792 struct ieee80211_hdr *hdr;
793 struct vnt_mic_hdr *mic_hdr = NULL;
794 struct vnt_tx_buffer *tx_buffer;
795 struct vnt_tx_fifo_head *tx_buffer_head;
796 struct vnt_usb_send_context *tx_context;
797 unsigned long flags;
798 u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
799 u8 pkt_type, fb_option = AUTO_FB_NONE;
800 bool need_rts = false;
801 bool need_mic = false;
802
803 hdr = (struct ieee80211_hdr *)(skb->data);
804
805 rate = ieee80211_get_tx_rate(priv->hw, info);
806
807 current_rate = rate->hw_value;
808 if (priv->current_rate != current_rate &&
809 !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
810 priv->current_rate = current_rate;
811 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
812 }
813
814 if (current_rate > RATE_11M) {
815 if (info->band == NL80211_BAND_5GHZ) {
816 pkt_type = PK_TYPE_11A;
817 } else {
818 if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
819 pkt_type = PK_TYPE_11GB;
820 else
821 pkt_type = PK_TYPE_11GA;
822 }
823 } else {
824 pkt_type = PK_TYPE_11B;
825 }
826
827 spin_lock_irqsave(&priv->lock, flags);
828
829 tx_context = vnt_get_free_context(priv);
830 if (!tx_context) {
831 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
832 spin_unlock_irqrestore(&priv->lock, flags);
833 return -ENOMEM;
834 }
835
836 tx_context->skb = skb;
837 tx_context->pkt_type = pkt_type;
838 tx_context->need_ack = false;
839 tx_context->frame_len = skb->len + 4;
840 tx_context->tx_rate = current_rate;
841
842 spin_unlock_irqrestore(&priv->lock, flags);
843
844 tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
845 tx_buffer_head = &tx_buffer->fifo_head;
846 tx_body_size = skb->len;
847
848
849 if (pkt_type == PK_TYPE_11A)
850 tx_buffer_head->fifo_ctl = 0;
851 else if (pkt_type == PK_TYPE_11B)
852 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
853 else if (pkt_type == PK_TYPE_11GB)
854 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
855 else if (pkt_type == PK_TYPE_11GA)
856 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
857
858 if (!ieee80211_is_data(hdr->frame_control)) {
859 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
860 FIFOCTL_ISDMA0);
861 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
862
863 tx_buffer_head->time_stamp =
864 cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
865 } else {
866 tx_buffer_head->time_stamp =
867 cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
868 }
869
870 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
871 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
872 tx_context->need_ack = true;
873 }
874
875 if (ieee80211_has_retry(hdr->frame_control))
876 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
877
878 if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
879 priv->preamble_type = PREAMBLE_SHORT;
880 else
881 priv->preamble_type = PREAMBLE_LONG;
882
883 if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
884 need_rts = true;
885 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
886 }
887
888 if (ieee80211_has_a4(hdr->frame_control))
889 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
890
891 tx_buffer_head->frag_ctl =
892 cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
893
894 if (info->control.hw_key) {
895 tx_key = info->control.hw_key;
896 switch (info->control.hw_key->cipher) {
897 case WLAN_CIPHER_SUITE_WEP40:
898 case WLAN_CIPHER_SUITE_WEP104:
899 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
900 break;
901 case WLAN_CIPHER_SUITE_TKIP:
902 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
903 break;
904 case WLAN_CIPHER_SUITE_CCMP:
905 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
906 need_mic = true;
907 default:
908 break;
909 }
910 tx_context->frame_len += tx_key->icv_len;
911 }
912
913 tx_buffer_head->current_rate = cpu_to_le16(current_rate);
914
915
916 if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
917 if (priv->auto_fb_ctrl == AUTO_FB_0) {
918 tx_buffer_head->fifo_ctl |=
919 cpu_to_le16(FIFOCTL_AUTO_FB_0);
920
921 priv->tx_rate_fb0 =
922 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
923 priv->tx_rate_fb1 =
924 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
925
926 fb_option = AUTO_FB_0;
927 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
928 tx_buffer_head->fifo_ctl |=
929 cpu_to_le16(FIFOCTL_AUTO_FB_1);
930
931 priv->tx_rate_fb0 =
932 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
933 priv->tx_rate_fb1 =
934 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
935
936 fb_option = AUTO_FB_1;
937 }
938 }
939
940 tx_context->fb_option = fb_option;
941
942 duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
943 need_mic, need_rts);
944
945 tx_header_size = tx_context->tx_hdr_size;
946 if (!tx_header_size) {
947 tx_context->in_use = false;
948 return -ENOMEM;
949 }
950
951 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
952
953 tx_bytes = tx_header_size + tx_body_size;
954
955 memcpy(tx_context->hdr, skb->data, tx_body_size);
956
957 hdr->duration_id = cpu_to_le16(duration_id);
958
959 if (info->control.hw_key) {
960 tx_key = info->control.hw_key;
961 if (tx_key->keylen > 0)
962 vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
963 tx_key, skb, tx_body_size, mic_hdr);
964 }
965
966 priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
967 IEEE80211_SCTL_SEQ) >> 4;
968
969 tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
970 tx_buffer->pkt_no = tx_context->pkt_no;
971 tx_buffer->type = 0x00;
972
973 tx_bytes += 4;
974
975 tx_context->type = CONTEXT_DATA_PACKET;
976 tx_context->buf_len = tx_bytes;
977
978 spin_lock_irqsave(&priv->lock, flags);
979
980 if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
981 spin_unlock_irqrestore(&priv->lock, flags);
982 return -EIO;
983 }
984
985 spin_unlock_irqrestore(&priv->lock, flags);
986
987 return 0;
988}
989
990static int vnt_beacon_xmit(struct vnt_private *priv, struct sk_buff *skb)
991{
992 struct vnt_beacon_buffer *beacon_buffer;
993 struct vnt_tx_short_buf_head *short_head;
994 struct ieee80211_tx_info *info;
995 struct vnt_usb_send_context *context;
996 struct ieee80211_mgmt *mgmt_hdr;
997 unsigned long flags;
998 u32 frame_size = skb->len + 4;
999 u16 current_rate, count;
1000
1001 spin_lock_irqsave(&priv->lock, flags);
1002
1003 context = vnt_get_free_context(priv);
1004 if (!context) {
1005 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
1006 spin_unlock_irqrestore(&priv->lock, flags);
1007 return -ENOMEM;
1008 }
1009
1010 context->skb = skb;
1011
1012 spin_unlock_irqrestore(&priv->lock, flags);
1013
1014 beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1015 short_head = &beacon_buffer->short_head;
1016
1017 if (priv->bb_type == BB_TYPE_11A) {
1018 current_rate = RATE_6M;
1019
1020
1021 vnt_get_phy_field(priv, frame_size, current_rate,
1022 PK_TYPE_11A, &short_head->ab);
1023
1024
1025 short_head->duration = vnt_get_duration_le(priv,
1026 PK_TYPE_11A, false);
1027 short_head->time_stamp_off =
1028 vnt_time_stamp_off(priv, current_rate);
1029 } else {
1030 current_rate = RATE_1M;
1031 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1032
1033
1034 vnt_get_phy_field(priv, frame_size, current_rate,
1035 PK_TYPE_11B, &short_head->ab);
1036
1037
1038 short_head->duration = vnt_get_duration_le(priv,
1039 PK_TYPE_11B, false);
1040 short_head->time_stamp_off =
1041 vnt_time_stamp_off(priv, current_rate);
1042 }
1043
1044
1045 mgmt_hdr = &beacon_buffer->mgmt_hdr;
1046 memcpy(mgmt_hdr, skb->data, skb->len);
1047
1048
1049 mgmt_hdr->u.beacon.timestamp = 0;
1050
1051 info = IEEE80211_SKB_CB(skb);
1052 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1053 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1054
1055 hdr->duration_id = 0;
1056 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1057 }
1058
1059 priv->seq_counter++;
1060 if (priv->seq_counter > 0x0fff)
1061 priv->seq_counter = 0;
1062
1063 count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1064
1065 beacon_buffer->tx_byte_count = cpu_to_le16(count);
1066 beacon_buffer->pkt_no = context->pkt_no;
1067 beacon_buffer->type = 0x01;
1068
1069 context->type = CONTEXT_BEACON_PACKET;
1070 context->buf_len = count + 4;
1071
1072 spin_lock_irqsave(&priv->lock, flags);
1073
1074 if (vnt_tx_context(priv, context) != STATUS_PENDING)
1075 ieee80211_free_txskb(priv->hw, context->skb);
1076
1077 spin_unlock_irqrestore(&priv->lock, flags);
1078
1079 return 0;
1080}
1081
1082int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1083{
1084 struct sk_buff *beacon;
1085
1086 beacon = ieee80211_beacon_get(priv->hw, vif);
1087 if (!beacon)
1088 return -ENOMEM;
1089
1090 if (vnt_beacon_xmit(priv, beacon)) {
1091 ieee80211_free_txskb(priv->hw, beacon);
1092 return -ENODEV;
1093 }
1094
1095 return 0;
1096}
1097
1098int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1099 struct ieee80211_bss_conf *conf)
1100{
1101 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1102
1103 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1104
1105 vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1106
1107 vnt_clear_current_tsf(priv);
1108
1109 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1110
1111 vnt_reset_next_tbtt(priv, conf->beacon_int);
1112
1113 return vnt_beacon_make(priv, vif);
1114}
1115
