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UBUNTU: Ubuntu-4.13.0-45.50
[mirror_ubuntu-artful-kernel.git] / drivers / staging / vt6656 / rxtx.c
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1/*
2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
3 * All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 *
16 * File: rxtx.c
17 *
18 * Purpose: handle WMAC/802.3/802.11 rx & tx functions
19 *
20 * Author: Lyndon Chen
21 *
22 * Date: May 20, 2003
23 *
24 * Functions:
25 * vnt_generate_tx_parameter - Generate tx dma required parameter.
26 * vnt_get_duration_le - get tx data required duration
27 * vnt_get_rtscts_duration_le- get rtx/cts required duration
28 * vnt_get_rtscts_rsvtime_le- get rts/cts reserved time
29 * vnt_get_rsvtime- get frame reserved time
30 * vnt_fill_cts_head- fulfill CTS ctl header
31 *
32 * Revision History:
33 *
34 */
35
36#include <linux/etherdevice.h>
37#include "device.h"
38#include "rxtx.h"
39#include "card.h"
40#include "mac.h"
41#include "rf.h"
42#include "usbpipe.h"
43
44static const u16 vnt_time_stampoff[2][MAX_RATE] = {
45 /* Long Preamble */
46 {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},
47
48 /* Short Preamble */
49 {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},
50};
51
52static const u16 vnt_fb_opt0[2][5] = {
53 {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */
54 {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */
55};
56
57static const u16 vnt_fb_opt1[2][5] = {
58 {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */
59 {RATE_6M, RATE_6M, RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */
60};
61
62#define RTSDUR_BB 0
63#define RTSDUR_BA 1
64#define RTSDUR_AA 2
65#define CTSDUR_BA 3
66#define RTSDUR_BA_F0 4
67#define RTSDUR_AA_F0 5
68#define RTSDUR_BA_F1 6
69#define RTSDUR_AA_F1 7
70#define CTSDUR_BA_F0 8
71#define CTSDUR_BA_F1 9
72#define DATADUR_B 10
73#define DATADUR_A 11
74#define DATADUR_A_F0 12
75#define DATADUR_A_F1 13
76
77static struct vnt_usb_send_context
78 *vnt_get_free_context(struct vnt_private *priv)
79{
80 struct vnt_usb_send_context *context = NULL;
81 int ii;
82
83 dev_dbg(&priv->usb->dev, "%s\n", __func__);
84
85 for (ii = 0; ii < priv->num_tx_context; ii++) {
86 if (!priv->tx_context[ii])
87 return NULL;
88
89 context = priv->tx_context[ii];
90 if (!context->in_use) {
91 context->in_use = true;
92 memset(context->data, 0,
93 MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
94
95 context->hdr = NULL;
96
97 return context;
98 }
99 }
100
101 if (ii == priv->num_tx_context) {
102 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
103
104 ieee80211_stop_queues(priv->hw);
105 }
106
107 return NULL;
108}
109
110static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
111{
112 return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
113 [rate % MAX_RATE]);
114}
115
116static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
117 u32 frame_length, u16 rate, int need_ack)
118{
119 u32 data_time, ack_time;
120
121 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
122 frame_length, rate);
123
124 if (pkt_type == PK_TYPE_11B)
125 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
126 14, (u16)priv->top_cck_basic_rate);
127 else
128 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
129 14, (u16)priv->top_ofdm_basic_rate);
130
131 if (need_ack)
132 return data_time + priv->sifs + ack_time;
133
134 return data_time;
135}
136
137static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
138 u32 frame_length, u16 rate, int need_ack)
139{
140 return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
141 frame_length, rate, need_ack));
142}
143
144static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv, u8 rsv_type,
145 u8 pkt_type, u32 frame_length,
146 u16 current_rate)
147{
148 u32 rrv_time, rts_time, cts_time, ack_time, data_time;
149
150 rrv_time = 0;
151 rts_time = 0;
152 cts_time = 0;
153 ack_time = 0;
154
155 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
156 frame_length, current_rate);
157
158 if (rsv_type == 0) {
159 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
160 20, priv->top_cck_basic_rate);
161 ack_time = vnt_get_frame_time(priv->preamble_type,
162 pkt_type, 14,
163 priv->top_cck_basic_rate);
164 cts_time = ack_time;
165
166 } else if (rsv_type == 1) {
167 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
168 20, priv->top_cck_basic_rate);
169 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
170 14, priv->top_cck_basic_rate);
171 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
172 14, priv->top_ofdm_basic_rate);
173 } else if (rsv_type == 2) {
174 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
175 20, priv->top_ofdm_basic_rate);
176 ack_time = vnt_get_frame_time(priv->preamble_type,
177 pkt_type, 14,
178 priv->top_ofdm_basic_rate);
179 cts_time = ack_time;
180
181 } else if (rsv_type == 3) {
182 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
183 14, priv->top_cck_basic_rate);
184 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
185 14, priv->top_ofdm_basic_rate);
186
187 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
188
189 return cpu_to_le16((u16)rrv_time);
190 }
191
192 rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
193
194 return cpu_to_le16((u16)rrv_time);
195}
196
197static __le16 vnt_get_duration_le(struct vnt_private *priv, u8 pkt_type,
198 int need_ack)
199{
200 u32 ack_time = 0;
201
202 if (need_ack) {
203 if (pkt_type == PK_TYPE_11B)
204 ack_time = vnt_get_frame_time(priv->preamble_type,
205 pkt_type, 14,
206 priv->top_cck_basic_rate);
207 else
208 ack_time = vnt_get_frame_time(priv->preamble_type,
209 pkt_type, 14,
210 priv->top_ofdm_basic_rate);
211
212 return cpu_to_le16((u16)(priv->sifs + ack_time));
213 }
214
215 return 0;
216}
217
218static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
219 u8 dur_type, u8 pkt_type, u16 rate)
220{
221 struct vnt_private *priv = context->priv;
222 u32 cts_time = 0, dur_time = 0;
223 u32 frame_length = context->frame_len;
224 u8 need_ack = context->need_ack;
225
226 switch (dur_type) {
227 case RTSDUR_BB:
228 case RTSDUR_BA:
229 case RTSDUR_BA_F0:
230 case RTSDUR_BA_F1:
231 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
232 14, priv->top_cck_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 RTSDUR_AA:
239 case RTSDUR_AA_F0:
240 case RTSDUR_AA_F1:
241 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
242 14, priv->top_ofdm_basic_rate);
243 dur_time = cts_time + 2 * priv->sifs +
244 vnt_get_rsvtime(priv, pkt_type,
245 frame_length, rate, need_ack);
246 break;
247
248 case CTSDUR_BA:
249 case CTSDUR_BA_F0:
250 case CTSDUR_BA_F1:
251 dur_time = priv->sifs + vnt_get_rsvtime(priv,
252 pkt_type, frame_length, rate, need_ack);
253 break;
254
255 default:
256 break;
257 }
258
259 return cpu_to_le16((u16)dur_time);
260}
261
262static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
263 struct ieee80211_hdr *hdr)
264{
265 u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
266 u8 *hdr_pos = (u8 *)hdr;
267
268 tx_context->hdr = hdr;
269 if (!tx_context->hdr)
270 return 0;
271
272 return (u16)(hdr_pos - head);
273}
274
275static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
276 struct vnt_tx_datahead_g *buf)
277{
278 struct vnt_private *priv = tx_context->priv;
279 struct ieee80211_hdr *hdr =
280 (struct ieee80211_hdr *)tx_context->skb->data;
281 u32 frame_len = tx_context->frame_len;
282 u16 rate = tx_context->tx_rate;
283 u8 need_ack = tx_context->need_ack;
284
285 /* Get SignalField,ServiceField,Length */
286 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
287 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
288 PK_TYPE_11B, &buf->b);
289
290 /* Get Duration and TimeStamp */
291 if (ieee80211_is_pspoll(hdr->frame_control)) {
292 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
293
294 buf->duration_a = dur;
295 buf->duration_b = dur;
296 } else {
297 buf->duration_a = vnt_get_duration_le(priv,
298 tx_context->pkt_type, need_ack);
299 buf->duration_b = vnt_get_duration_le(priv,
300 PK_TYPE_11B, need_ack);
301 }
302
303 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
304 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
305 priv->top_cck_basic_rate);
306
307 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
308
309 return le16_to_cpu(buf->duration_a);
310}
311
312static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
313 struct vnt_tx_datahead_g_fb *buf)
314{
315 struct vnt_private *priv = tx_context->priv;
316 u32 frame_len = tx_context->frame_len;
317 u16 rate = tx_context->tx_rate;
318 u8 need_ack = tx_context->need_ack;
319
320 /* Get SignalField,ServiceField,Length */
321 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
322
323 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
324 PK_TYPE_11B, &buf->b);
325
326 /* Get Duration and TimeStamp */
327 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
328 need_ack);
329 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
330
331 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
332 need_ack);
333 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
334 need_ack);
335
336 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
337 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
338 priv->top_cck_basic_rate);
339
340 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
341
342 return le16_to_cpu(buf->duration_a);
343}
344
345static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
346 struct vnt_tx_datahead_a_fb *buf)
347{
348 struct vnt_private *priv = tx_context->priv;
349 u16 rate = tx_context->tx_rate;
350 u8 pkt_type = tx_context->pkt_type;
351 u8 need_ack = tx_context->need_ack;
352 u32 frame_len = tx_context->frame_len;
353
354 /* Get SignalField,ServiceField,Length */
355 vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
356 /* Get Duration and TimeStampOff */
357 buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
358
359 buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
360 buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
361
362 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
363
364 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
365
366 return le16_to_cpu(buf->duration);
367}
368
369static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
370 struct vnt_tx_datahead_ab *buf)
371{
372 struct vnt_private *priv = tx_context->priv;
373 struct ieee80211_hdr *hdr =
374 (struct ieee80211_hdr *)tx_context->skb->data;
375 u32 frame_len = tx_context->frame_len;
376 u16 rate = tx_context->tx_rate;
377 u8 need_ack = tx_context->need_ack;
378
379 /* Get SignalField,ServiceField,Length */
380 vnt_get_phy_field(priv, frame_len, rate,
381 tx_context->pkt_type, &buf->ab);
382
383 /* Get Duration and TimeStampOff */
384 if (ieee80211_is_pspoll(hdr->frame_control)) {
385 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
386
387 buf->duration = dur;
388 } else {
389 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
390 need_ack);
391 }
392
393 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
394
395 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
396
397 return le16_to_cpu(buf->duration);
398}
399
400static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
401 struct ieee80211_rts *rts, __le16 duration)
402{
403 struct ieee80211_hdr *hdr =
404 (struct ieee80211_hdr *)tx_context->skb->data;
405
406 rts->duration = duration;
407 rts->frame_control =
408 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
409
410 ether_addr_copy(rts->ra, hdr->addr1);
411 ether_addr_copy(rts->ta, hdr->addr2);
412
413 return 0;
414}
415
416static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
417 struct vnt_rts_g *buf)
418{
419 struct vnt_private *priv = tx_context->priv;
420 u16 rts_frame_len = 20;
421 u16 current_rate = tx_context->tx_rate;
422
423 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
424 PK_TYPE_11B, &buf->b);
425 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
426 tx_context->pkt_type, &buf->a);
427
428 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
429 PK_TYPE_11B,
430 priv->top_cck_basic_rate);
431 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
432 tx_context->pkt_type,
433 current_rate);
434 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
435 tx_context->pkt_type,
436 current_rate);
437
438 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
439
440 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
441}
442
443static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
444 struct vnt_rts_g_fb *buf)
445{
446 struct vnt_private *priv = tx_context->priv;
447 u16 current_rate = tx_context->tx_rate;
448 u16 rts_frame_len = 20;
449
450 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
451 PK_TYPE_11B, &buf->b);
452 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
453 tx_context->pkt_type, &buf->a);
454
455 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
456 PK_TYPE_11B,
457 priv->top_cck_basic_rate);
458 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
459 tx_context->pkt_type,
460 current_rate);
461 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
462 tx_context->pkt_type,
463 current_rate);
464
465 buf->rts_duration_ba_f0 =
466 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
467 tx_context->pkt_type,
468 priv->tx_rate_fb0);
469 buf->rts_duration_aa_f0 =
470 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
471 tx_context->pkt_type,
472 priv->tx_rate_fb0);
473 buf->rts_duration_ba_f1 =
474 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
475 tx_context->pkt_type,
476 priv->tx_rate_fb1);
477 buf->rts_duration_aa_f1 =
478 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
479 tx_context->pkt_type,
480 priv->tx_rate_fb1);
481
482 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
483
484 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
485}
486
487static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
488 struct vnt_rts_ab *buf)
489{
490 struct vnt_private *priv = tx_context->priv;
491 u16 current_rate = tx_context->tx_rate;
492 u16 rts_frame_len = 20;
493
494 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
495 tx_context->pkt_type, &buf->ab);
496
497 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
498 tx_context->pkt_type,
499 current_rate);
500
501 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
502
503 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
504}
505
506static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
507 struct vnt_rts_a_fb *buf)
508{
509 struct vnt_private *priv = tx_context->priv;
510 u16 current_rate = tx_context->tx_rate;
511 u16 rts_frame_len = 20;
512
513 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
514 tx_context->pkt_type, &buf->a);
515
516 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
517 tx_context->pkt_type,
518 current_rate);
519
520 buf->rts_duration_f0 =
521 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
522 tx_context->pkt_type,
523 priv->tx_rate_fb0);
524
525 buf->rts_duration_f1 =
526 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
527 tx_context->pkt_type,
528 priv->tx_rate_fb1);
529
530 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
531
532 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
533}
534
535static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
536 union vnt_tx_data_head *head)
537{
538 struct vnt_private *priv = tx_context->priv;
539 struct vnt_cts_fb *buf = &head->cts_g_fb;
540 u32 cts_frame_len = 14;
541 u16 current_rate = tx_context->tx_rate;
542
543 /* Get SignalField,ServiceField,Length */
544 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
545 PK_TYPE_11B, &buf->b);
546
547 buf->duration_ba =
548 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
549 tx_context->pkt_type,
550 current_rate);
551 /* Get CTSDuration_ba_f0 */
552 buf->cts_duration_ba_f0 =
553 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
554 tx_context->pkt_type,
555 priv->tx_rate_fb0);
556 /* Get CTSDuration_ba_f1 */
557 buf->cts_duration_ba_f1 =
558 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
559 tx_context->pkt_type,
560 priv->tx_rate_fb1);
561 /* Get CTS Frame body */
562 buf->data.duration = buf->duration_ba;
563 buf->data.frame_control =
564 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
565
566 ether_addr_copy(buf->data.ra, priv->current_net_addr);
567
568 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
569}
570
571static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
572 union vnt_tx_data_head *head)
573{
574 struct vnt_private *priv = tx_context->priv;
575 struct vnt_cts *buf = &head->cts_g;
576 u32 cts_frame_len = 14;
577 u16 current_rate = tx_context->tx_rate;
578
579 /* Get SignalField,ServiceField,Length */
580 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
581 PK_TYPE_11B, &buf->b);
582 /* Get CTSDuration_ba */
583 buf->duration_ba =
584 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
585 tx_context->pkt_type,
586 current_rate);
587 /*Get CTS Frame body*/
588 buf->data.duration = buf->duration_ba;
589 buf->data.frame_control =
590 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
591
592 ether_addr_copy(buf->data.ra, priv->current_net_addr);
593
594 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
595}
596
597static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
598 union vnt_tx_head *tx_head, bool need_mic)
599{
600 struct vnt_private *priv = tx_context->priv;
601 struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
602 union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
603 u32 frame_len = tx_context->frame_len;
604 u16 current_rate = tx_context->tx_rate;
605 u8 need_ack = tx_context->need_ack;
606
607 buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
608 tx_context->pkt_type, frame_len, current_rate);
609 buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
610 tx_context->pkt_type, frame_len, current_rate);
611 buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
612 tx_context->pkt_type, frame_len, current_rate);
613
614 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
615 frame_len, current_rate,
616 need_ack);
617 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
618 priv->top_cck_basic_rate, need_ack);
619
620 if (need_mic)
621 head = &tx_head->tx_rts.tx.mic.head;
622
623 if (tx_context->fb_option)
624 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
625
626 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
627}
628
629static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
630 union vnt_tx_head *tx_head, bool need_mic)
631{
632 struct vnt_private *priv = tx_context->priv;
633 struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
634 union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
635 u32 frame_len = tx_context->frame_len;
636 u16 current_rate = tx_context->tx_rate;
637 u8 need_ack = tx_context->need_ack;
638
639 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
640 frame_len, current_rate, need_ack);
641 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
642 frame_len, priv->top_cck_basic_rate, need_ack);
643
644 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
645 tx_context->pkt_type, frame_len, current_rate);
646
647 if (need_mic)
648 head = &tx_head->tx_cts.tx.mic.head;
649
650 /* Fill CTS */
651 if (tx_context->fb_option)
652 return vnt_fill_cts_fb_head(tx_context, head);
653
654 return vnt_fill_cts_head(tx_context, head);
655}
656
657static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
658 union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
659{
660 struct vnt_private *priv = tx_context->priv;
661 struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
662 union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
663 u32 frame_len = tx_context->frame_len;
664 u16 current_rate = tx_context->tx_rate;
665 u8 need_ack = tx_context->need_ack;
666
667 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
668 frame_len, current_rate, need_ack);
669
670 if (need_mic)
671 head = &tx_head->tx_ab.tx.mic.head;
672
673 if (need_rts) {
674 if (tx_context->pkt_type == PK_TYPE_11B)
675 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
676 tx_context->pkt_type, frame_len, current_rate);
677 else /* PK_TYPE_11A */
678 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
679 tx_context->pkt_type, frame_len, current_rate);
680
681 if (tx_context->fb_option &&
682 tx_context->pkt_type == PK_TYPE_11A)
683 return vnt_rxtx_rts_a_fb_head(tx_context,
684 &head->rts_a_fb);
685
686 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
687 }
688
689 if (tx_context->pkt_type == PK_TYPE_11A)
690 return vnt_rxtx_datahead_a_fb(tx_context,
691 &head->data_head_a_fb);
692
693 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
694}
695
696static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
697 struct vnt_tx_buffer *tx_buffer,
698 struct vnt_mic_hdr **mic_hdr, u32 need_mic,
699 bool need_rts)
700{
701 if (tx_context->pkt_type == PK_TYPE_11GB ||
702 tx_context->pkt_type == PK_TYPE_11GA) {
703 if (need_rts) {
704 if (need_mic)
705 *mic_hdr =
706 &tx_buffer->tx_head.tx_rts.tx.mic.hdr;
707
708 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
709 need_mic);
710 }
711
712 if (need_mic)
713 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
714
715 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
716 }
717
718 if (need_mic)
719 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
720
721 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
722}
723
724static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
725 u8 *key_buffer, struct ieee80211_key_conf *tx_key,
726 struct sk_buff *skb, u16 payload_len,
727 struct vnt_mic_hdr *mic_hdr)
728{
729 struct ieee80211_hdr *hdr = tx_context->hdr;
730 u64 pn64;
731 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
732
733 /* strip header and icv len from payload */
734 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
735 payload_len -= tx_key->icv_len;
736
737 switch (tx_key->cipher) {
738 case WLAN_CIPHER_SUITE_WEP40:
739 case WLAN_CIPHER_SUITE_WEP104:
740 memcpy(key_buffer, iv, 3);
741 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
742
743 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
744 memcpy(key_buffer + 8, iv, 3);
745 memcpy(key_buffer + 11,
746 tx_key->key, WLAN_KEY_LEN_WEP40);
747 }
748
749 break;
750 case WLAN_CIPHER_SUITE_TKIP:
751 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
752
753 break;
754 case WLAN_CIPHER_SUITE_CCMP:
755
756 if (!mic_hdr)
757 return;
758
759 mic_hdr->id = 0x59;
760 mic_hdr->payload_len = cpu_to_be16(payload_len);
761 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
762
763 pn64 = atomic64_read(&tx_key->tx_pn);
764 mic_hdr->ccmp_pn[5] = pn64;
765 mic_hdr->ccmp_pn[4] = pn64 >> 8;
766 mic_hdr->ccmp_pn[3] = pn64 >> 16;
767 mic_hdr->ccmp_pn[2] = pn64 >> 24;
768 mic_hdr->ccmp_pn[1] = pn64 >> 32;
769 mic_hdr->ccmp_pn[0] = pn64 >> 40;
770
771 if (ieee80211_has_a4(hdr->frame_control))
772 mic_hdr->hlen = cpu_to_be16(28);
773 else
774 mic_hdr->hlen = cpu_to_be16(22);
775
776 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
777 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
778 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
779
780 mic_hdr->frame_control = cpu_to_le16(
781 le16_to_cpu(hdr->frame_control) & 0xc78f);
782 mic_hdr->seq_ctrl = cpu_to_le16(
783 le16_to_cpu(hdr->seq_ctrl) & 0xf);
784
785 if (ieee80211_has_a4(hdr->frame_control))
786 ether_addr_copy(mic_hdr->addr4, hdr->addr4);
787
788 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
789
790 break;
791 default:
792 break;
793 }
794}
795
796int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
797{
798 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
799 struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
800 struct ieee80211_rate *rate;
801 struct ieee80211_key_conf *tx_key;
802 struct ieee80211_hdr *hdr;
803 struct vnt_mic_hdr *mic_hdr = NULL;
804 struct vnt_tx_buffer *tx_buffer;
805 struct vnt_tx_fifo_head *tx_buffer_head;
806 struct vnt_usb_send_context *tx_context;
807 unsigned long flags;
808 u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
809 u8 pkt_type, fb_option = AUTO_FB_NONE;
810 bool need_rts = false, is_pspoll = false;
811 bool need_mic = false;
812
813 hdr = (struct ieee80211_hdr *)(skb->data);
814
815 rate = ieee80211_get_tx_rate(priv->hw, info);
816
817 current_rate = rate->hw_value;
818 if (priv->current_rate != current_rate &&
819 !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
820 priv->current_rate = current_rate;
821 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
822 }
823
824 if (current_rate > RATE_11M) {
825 if (info->band == NL80211_BAND_5GHZ) {
826 pkt_type = PK_TYPE_11A;
827 } else {
828 if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
829 pkt_type = PK_TYPE_11GB;
830 else
831 pkt_type = PK_TYPE_11GA;
832 }
833 } else {
834 pkt_type = PK_TYPE_11B;
835 }
836
837 spin_lock_irqsave(&priv->lock, flags);
838
839 tx_context = vnt_get_free_context(priv);
840 if (!tx_context) {
841 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
842 spin_unlock_irqrestore(&priv->lock, flags);
843 return -ENOMEM;
844 }
845
846 tx_context->skb = skb;
847 tx_context->pkt_type = pkt_type;
848 tx_context->need_ack = false;
849 tx_context->frame_len = skb->len + 4;
850 tx_context->tx_rate = current_rate;
851
852 spin_unlock_irqrestore(&priv->lock, flags);
853
854 tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
855 tx_buffer_head = &tx_buffer->fifo_head;
856 tx_body_size = skb->len;
857
858 /*Set fifo controls */
859 if (pkt_type == PK_TYPE_11A)
860 tx_buffer_head->fifo_ctl = 0;
861 else if (pkt_type == PK_TYPE_11B)
862 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
863 else if (pkt_type == PK_TYPE_11GB)
864 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
865 else if (pkt_type == PK_TYPE_11GA)
866 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
867
868 if (!ieee80211_is_data(hdr->frame_control)) {
869 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
870 FIFOCTL_ISDMA0);
871 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
872
873 tx_buffer_head->time_stamp =
874 cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
875 } else {
876 tx_buffer_head->time_stamp =
877 cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
878 }
879
880 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
881 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
882 tx_context->need_ack = true;
883 }
884
885 if (ieee80211_has_retry(hdr->frame_control))
886 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
887
888 if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
889 priv->preamble_type = PREAMBLE_SHORT;
890 else
891 priv->preamble_type = PREAMBLE_LONG;
892
893 if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
894 need_rts = true;
895 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
896 }
897
898 if (ieee80211_has_a4(hdr->frame_control))
899 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
900
901 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
902 is_pspoll = true;
903
904 tx_buffer_head->frag_ctl =
905 cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
906
907 if (info->control.hw_key) {
908 tx_key = info->control.hw_key;
909 switch (info->control.hw_key->cipher) {
910 case WLAN_CIPHER_SUITE_WEP40:
911 case WLAN_CIPHER_SUITE_WEP104:
912 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
913 break;
914 case WLAN_CIPHER_SUITE_TKIP:
915 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
916 break;
917 case WLAN_CIPHER_SUITE_CCMP:
918 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
919 need_mic = true;
920 default:
921 break;
922 }
923 tx_context->frame_len += tx_key->icv_len;
924 }
925
926 tx_buffer_head->current_rate = cpu_to_le16(current_rate);
927
928 /* legacy rates TODO use ieee80211_tx_rate */
929 if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
930 if (priv->auto_fb_ctrl == AUTO_FB_0) {
931 tx_buffer_head->fifo_ctl |=
932 cpu_to_le16(FIFOCTL_AUTO_FB_0);
933
934 priv->tx_rate_fb0 =
935 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
936 priv->tx_rate_fb1 =
937 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
938
939 fb_option = AUTO_FB_0;
940 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
941 tx_buffer_head->fifo_ctl |=
942 cpu_to_le16(FIFOCTL_AUTO_FB_1);
943
944 priv->tx_rate_fb0 =
945 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
946 priv->tx_rate_fb1 =
947 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
948
949 fb_option = AUTO_FB_1;
950 }
951 }
952
953 tx_context->fb_option = fb_option;
954
955 duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
956 need_mic, need_rts);
957
958 tx_header_size = tx_context->tx_hdr_size;
959 if (!tx_header_size) {
960 tx_context->in_use = false;
961 return -ENOMEM;
962 }
963
964 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
965
966 tx_bytes = tx_header_size + tx_body_size;
967
968 memcpy(tx_context->hdr, skb->data, tx_body_size);
969
970 hdr->duration_id = cpu_to_le16(duration_id);
971
972 if (info->control.hw_key) {
973 tx_key = info->control.hw_key;
974 if (tx_key->keylen > 0)
975 vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
976 tx_key, skb, tx_body_size, mic_hdr);
977 }
978
979 priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
980 IEEE80211_SCTL_SEQ) >> 4;
981
982 tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
983 tx_buffer->pkt_no = tx_context->pkt_no;
984 tx_buffer->type = 0x00;
985
986 tx_bytes += 4;
987
988 tx_context->type = CONTEXT_DATA_PACKET;
989 tx_context->buf_len = tx_bytes;
990
991 spin_lock_irqsave(&priv->lock, flags);
992
993 if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
994 spin_unlock_irqrestore(&priv->lock, flags);
995 return -EIO;
996 }
997
998 spin_unlock_irqrestore(&priv->lock, flags);
999
1000 return 0;
1001}
1002
1003static int vnt_beacon_xmit(struct vnt_private *priv, struct sk_buff *skb)
1004{
1005 struct vnt_beacon_buffer *beacon_buffer;
1006 struct vnt_tx_short_buf_head *short_head;
1007 struct ieee80211_tx_info *info;
1008 struct vnt_usb_send_context *context;
1009 struct ieee80211_mgmt *mgmt_hdr;
1010 unsigned long flags;
1011 u32 frame_size = skb->len + 4;
1012 u16 current_rate, count;
1013
1014 spin_lock_irqsave(&priv->lock, flags);
1015
1016 context = vnt_get_free_context(priv);
1017 if (!context) {
1018 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
1019 spin_unlock_irqrestore(&priv->lock, flags);
1020 return -ENOMEM;
1021 }
1022
1023 context->skb = skb;
1024
1025 spin_unlock_irqrestore(&priv->lock, flags);
1026
1027 beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1028 short_head = &beacon_buffer->short_head;
1029
1030 if (priv->bb_type == BB_TYPE_11A) {
1031 current_rate = RATE_6M;
1032
1033 /* Get SignalField,ServiceField,Length */
1034 vnt_get_phy_field(priv, frame_size, current_rate,
1035 PK_TYPE_11A, &short_head->ab);
1036
1037 /* Get Duration and TimeStampOff */
1038 short_head->duration = vnt_get_duration_le(priv,
1039 PK_TYPE_11A, false);
1040 short_head->time_stamp_off =
1041 vnt_time_stamp_off(priv, current_rate);
1042 } else {
1043 current_rate = RATE_1M;
1044 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1045
1046 /* Get SignalField,ServiceField,Length */
1047 vnt_get_phy_field(priv, frame_size, current_rate,
1048 PK_TYPE_11B, &short_head->ab);
1049
1050 /* Get Duration and TimeStampOff */
1051 short_head->duration = vnt_get_duration_le(priv,
1052 PK_TYPE_11B, false);
1053 short_head->time_stamp_off =
1054 vnt_time_stamp_off(priv, current_rate);
1055 }
1056
1057 /* Generate Beacon Header */
1058 mgmt_hdr = &beacon_buffer->mgmt_hdr;
1059 memcpy(mgmt_hdr, skb->data, skb->len);
1060
1061 /* time stamp always 0 */
1062 mgmt_hdr->u.beacon.timestamp = 0;
1063
1064 info = IEEE80211_SKB_CB(skb);
1065 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1066 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1067
1068 hdr->duration_id = 0;
1069 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1070 }
1071
1072 priv->seq_counter++;
1073 if (priv->seq_counter > 0x0fff)
1074 priv->seq_counter = 0;
1075
1076 count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1077
1078 beacon_buffer->tx_byte_count = cpu_to_le16(count);
1079 beacon_buffer->pkt_no = context->pkt_no;
1080 beacon_buffer->type = 0x01;
1081
1082 context->type = CONTEXT_BEACON_PACKET;
1083 context->buf_len = count + 4; /* USB header */
1084
1085 spin_lock_irqsave(&priv->lock, flags);
1086
1087 if (vnt_tx_context(priv, context) != STATUS_PENDING)
1088 ieee80211_free_txskb(priv->hw, context->skb);
1089
1090 spin_unlock_irqrestore(&priv->lock, flags);
1091
1092 return 0;
1093}
1094
1095int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1096{
1097 struct sk_buff *beacon;
1098
1099 beacon = ieee80211_beacon_get(priv->hw, vif);
1100 if (!beacon)
1101 return -ENOMEM;
1102
1103 if (vnt_beacon_xmit(priv, beacon)) {
1104 ieee80211_free_txskb(priv->hw, beacon);
1105 return -ENODEV;
1106 }
1107
1108 return 0;
1109}
1110
1111int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1112 struct ieee80211_bss_conf *conf)
1113{
1114 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1115
1116 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1117
1118 vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1119
1120 vnt_clear_current_tsf(priv);
1121
1122 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1123
1124 vnt_reset_next_tbtt(priv, conf->beacon_int);
1125
1126 return vnt_beacon_make(priv, vif);
1127}
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