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[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 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * File: rxtx.c
20 *
21 * Purpose: handle WMAC/802.3/802.11 rx & tx functions
22 *
23 * Author: Lyndon Chen
24 *
25 * Date: May 20, 2003
26 *
27 * Functions:
28 * vnt_generate_tx_parameter - Generate tx dma required parameter.
29 * vnt_get_duration_le - get tx data required duration
30 * vnt_get_rtscts_duration_le- get rtx/cts required duration
31 * vnt_get_rtscts_rsvtime_le- get rts/cts reserved time
32 * vnt_get_rsvtime- get frame reserved time
33 * vnt_fill_cts_head- fulfill CTS ctl header
34 *
35 * Revision History:
36 *
37 */
38
39#include <linux/etherdevice.h>
40#include "device.h"
41#include "rxtx.h"
42#include "card.h"
43#include "mac.h"
44#include "rf.h"
45#include "usbpipe.h"
46
47static const u16 vnt_time_stampoff[2][MAX_RATE] = {
48 {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},/* Long Preamble */
49 {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},/* Short Preamble */
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 == false) {
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 return NULL;
105}
106
107static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
108{
109 return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
110 [rate % MAX_RATE]);
111}
112
113static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
114 u32 frame_length, u16 rate, int need_ack)
115{
116 u32 data_time, ack_time;
117
118 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
119 frame_length, rate);
120
121 if (pkt_type == PK_TYPE_11B)
122 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
123 14, (u16)priv->top_cck_basic_rate);
124 else
125 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
126 14, (u16)priv->top_ofdm_basic_rate);
127
128 if (need_ack)
129 return data_time + priv->sifs + ack_time;
130
131 return data_time;
132}
133
134static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
135 u32 frame_length, u16 rate, int need_ack)
136{
137 return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
138 frame_length, rate, need_ack));
139}
140
141static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv,
142 u8 rsv_type, u8 pkt_type, u32 frame_length, u16 current_rate)
143{
144 u32 rrv_time, rts_time, cts_time, ack_time, data_time;
145
146 rrv_time = rts_time = cts_time = ack_time = data_time = 0;
147
148 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
149 frame_length, current_rate);
150
151 if (rsv_type == 0) {
152 rts_time = vnt_get_frame_time(priv->preamble_type,
153 pkt_type, 20, priv->top_cck_basic_rate);
154 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
155 pkt_type, 14, priv->top_cck_basic_rate);
156 } else if (rsv_type == 1) {
157 rts_time = vnt_get_frame_time(priv->preamble_type,
158 pkt_type, 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 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
167 pkt_type, 14, priv->top_ofdm_basic_rate);
168 } else if (rsv_type == 3) {
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
174 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
175
176 return cpu_to_le16((u16)rrv_time);
177 }
178
179 rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
180
181 return cpu_to_le16((u16)rrv_time);
182}
183
184static __le16 vnt_get_duration_le(struct vnt_private *priv,
185 u8 pkt_type, int need_ack)
186{
187 u32 ack_time = 0;
188
189 if (need_ack) {
190 if (pkt_type == PK_TYPE_11B)
191 ack_time = vnt_get_frame_time(priv->preamble_type,
192 pkt_type, 14, priv->top_cck_basic_rate);
193 else
194 ack_time = vnt_get_frame_time(priv->preamble_type,
195 pkt_type, 14, priv->top_ofdm_basic_rate);
196
197 return cpu_to_le16((u16)(priv->sifs + ack_time));
198 }
199
200 return 0;
201}
202
203static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
204 u8 dur_type, u8 pkt_type, u16 rate)
205{
206 struct vnt_private *priv = context->priv;
207 u32 cts_time = 0, dur_time = 0;
208 u32 frame_length = context->frame_len;
209 u8 need_ack = context->need_ack;
210
211 switch (dur_type) {
212 case RTSDUR_BB:
213 case RTSDUR_BA:
214 case RTSDUR_BA_F0:
215 case RTSDUR_BA_F1:
216 cts_time = vnt_get_frame_time(priv->preamble_type,
217 pkt_type, 14, priv->top_cck_basic_rate);
218 dur_time = cts_time + 2 * priv->sifs +
219 vnt_get_rsvtime(priv, pkt_type,
220 frame_length, rate, need_ack);
221 break;
222
223 case RTSDUR_AA:
224 case RTSDUR_AA_F0:
225 case RTSDUR_AA_F1:
226 cts_time = vnt_get_frame_time(priv->preamble_type,
227 pkt_type, 14, priv->top_ofdm_basic_rate);
228 dur_time = cts_time + 2 * priv->sifs +
229 vnt_get_rsvtime(priv, pkt_type,
230 frame_length, rate, need_ack);
231 break;
232
233 case CTSDUR_BA:
234 case CTSDUR_BA_F0:
235 case CTSDUR_BA_F1:
236 dur_time = priv->sifs + vnt_get_rsvtime(priv,
237 pkt_type, frame_length, rate, need_ack);
238 break;
239
240 default:
241 break;
242 }
243
244 return cpu_to_le16((u16)dur_time);
245}
246
247static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
248 struct ieee80211_hdr *hdr)
249{
250 u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
251 u8 *hdr_pos = (u8 *)hdr;
252
253 tx_context->hdr = hdr;
254 if (!tx_context->hdr)
255 return 0;
256
257 return (u16)(hdr_pos - head);
258}
259
260static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
261 struct vnt_tx_datahead_g *buf)
262{
263
264 struct vnt_private *priv = tx_context->priv;
265 struct ieee80211_hdr *hdr =
266 (struct ieee80211_hdr *)tx_context->skb->data;
267 u32 frame_len = tx_context->frame_len;
268 u16 rate = tx_context->tx_rate;
269 u8 need_ack = tx_context->need_ack;
270
271 /* Get SignalField,ServiceField,Length */
272 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
273 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
274 PK_TYPE_11B, &buf->b);
275
276 /* Get Duration and TimeStamp */
277 if (ieee80211_is_pspoll(hdr->frame_control)) {
278 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
279
280 buf->duration_a = dur;
281 buf->duration_b = dur;
282 } else {
283 buf->duration_a = vnt_get_duration_le(priv,
284 tx_context->pkt_type, need_ack);
285 buf->duration_b = vnt_get_duration_le(priv,
286 PK_TYPE_11B, need_ack);
287 }
288
289 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
290 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
291 priv->top_cck_basic_rate);
292
293 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
294
295 return le16_to_cpu(buf->duration_a);
296}
297
298static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
299 struct vnt_tx_datahead_g_fb *buf)
300{
301 struct vnt_private *priv = tx_context->priv;
302 u32 frame_len = tx_context->frame_len;
303 u16 rate = tx_context->tx_rate;
304 u8 need_ack = tx_context->need_ack;
305
306 /* Get SignalField,ServiceField,Length */
307 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
308
309 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
310 PK_TYPE_11B, &buf->b);
311
312 /* Get Duration and TimeStamp */
313 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
314 need_ack);
315 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
316
317 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
318 need_ack);
319 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
320 need_ack);
321
322 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
323 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
324 priv->top_cck_basic_rate);
325
326 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
327
328 return le16_to_cpu(buf->duration_a);
329}
330
331static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
332 struct vnt_tx_datahead_a_fb *buf)
333{
334 struct vnt_private *priv = tx_context->priv;
335 u16 rate = tx_context->tx_rate;
336 u8 pkt_type = tx_context->pkt_type;
337 u8 need_ack = tx_context->need_ack;
338 u32 frame_len = tx_context->frame_len;
339
340 /* Get SignalField,ServiceField,Length */
341 vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
342 /* Get Duration and TimeStampOff */
343 buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
344
345 buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
346 buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
347
348 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
349
350 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
351
352 return le16_to_cpu(buf->duration);
353}
354
355static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
356 struct vnt_tx_datahead_ab *buf)
357{
358 struct vnt_private *priv = tx_context->priv;
359 struct ieee80211_hdr *hdr =
360 (struct ieee80211_hdr *)tx_context->skb->data;
361 u32 frame_len = tx_context->frame_len;
362 u16 rate = tx_context->tx_rate;
363 u8 need_ack = tx_context->need_ack;
364
365 /* Get SignalField,ServiceField,Length */
366 vnt_get_phy_field(priv, frame_len, rate,
367 tx_context->pkt_type, &buf->ab);
368
369 /* Get Duration and TimeStampOff */
370 if (ieee80211_is_pspoll(hdr->frame_control)) {
371 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
372
373 buf->duration = dur;
374 } else {
375 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
376 need_ack);
377 }
378
379 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
380
381 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
382
383 return le16_to_cpu(buf->duration);
384}
385
386static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
387 struct ieee80211_rts *rts, __le16 duration)
388{
389 struct ieee80211_hdr *hdr =
390 (struct ieee80211_hdr *)tx_context->skb->data;
391
392 rts->duration = duration;
393 rts->frame_control =
394 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
395
396 ether_addr_copy(rts->ra, hdr->addr1);
397 ether_addr_copy(rts->ta, hdr->addr2);
398
399 return 0;
400}
401
402static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
403 struct vnt_rts_g *buf)
404{
405 struct vnt_private *priv = tx_context->priv;
406 u16 rts_frame_len = 20;
407 u16 current_rate = tx_context->tx_rate;
408
409 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
410 PK_TYPE_11B, &buf->b);
411 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
412 tx_context->pkt_type, &buf->a);
413
414 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
415 PK_TYPE_11B,
416 priv->top_cck_basic_rate);
417 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
418 tx_context->pkt_type,
419 current_rate);
420 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
421 tx_context->pkt_type,
422 current_rate);
423
424 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
425
426 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
427}
428
429static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
430 struct vnt_rts_g_fb *buf)
431{
432 struct vnt_private *priv = tx_context->priv;
433 u16 current_rate = tx_context->tx_rate;
434 u16 rts_frame_len = 20;
435
436 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
437 PK_TYPE_11B, &buf->b);
438 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
439 tx_context->pkt_type, &buf->a);
440
441 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
442 PK_TYPE_11B,
443 priv->top_cck_basic_rate);
444 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
445 tx_context->pkt_type,
446 current_rate);
447 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
448 tx_context->pkt_type,
449 current_rate);
450
451 buf->rts_duration_ba_f0 =
452 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
453 tx_context->pkt_type,
454 priv->tx_rate_fb0);
455 buf->rts_duration_aa_f0 =
456 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
457 tx_context->pkt_type,
458 priv->tx_rate_fb0);
459 buf->rts_duration_ba_f1 =
460 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
461 tx_context->pkt_type,
462 priv->tx_rate_fb1);
463 buf->rts_duration_aa_f1 =
464 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
465 tx_context->pkt_type,
466 priv->tx_rate_fb1);
467
468 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
469
470 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
471}
472
473static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
474 struct vnt_rts_ab *buf)
475{
476 struct vnt_private *priv = tx_context->priv;
477 u16 current_rate = tx_context->tx_rate;
478 u16 rts_frame_len = 20;
479
480 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
481 tx_context->pkt_type, &buf->ab);
482
483 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
484 tx_context->pkt_type,
485 current_rate);
486
487 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
488
489 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
490}
491
492static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
493 struct vnt_rts_a_fb *buf)
494{
495 struct vnt_private *priv = tx_context->priv;
496 u16 current_rate = tx_context->tx_rate;
497 u16 rts_frame_len = 20;
498
499 vnt_get_phy_field(priv, rts_frame_len,
500 priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a);
501
502 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
503 tx_context->pkt_type,
504 current_rate);
505
506 buf->rts_duration_f0 =
507 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
508 tx_context->pkt_type,
509 priv->tx_rate_fb0);
510
511 buf->rts_duration_f1 =
512 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
513 tx_context->pkt_type,
514 priv->tx_rate_fb1);
515
516 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
517
518 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
519}
520
521static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
522 union vnt_tx_data_head *head)
523{
524 struct vnt_private *priv = tx_context->priv;
525 struct vnt_cts_fb *buf = &head->cts_g_fb;
526 u32 cts_frame_len = 14;
527 u16 current_rate = tx_context->tx_rate;
528
529 /* Get SignalField,ServiceField,Length */
530 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
531 PK_TYPE_11B, &buf->b);
532
533 buf->duration_ba =
534 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
535 tx_context->pkt_type,
536 current_rate);
537 /* Get CTSDuration_ba_f0 */
538 buf->cts_duration_ba_f0 =
539 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
540 tx_context->pkt_type,
541 priv->tx_rate_fb0);
542 /* Get CTSDuration_ba_f1 */
543 buf->cts_duration_ba_f1 =
544 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
545 tx_context->pkt_type,
546 priv->tx_rate_fb1);
547 /* Get CTS Frame body */
548 buf->data.duration = buf->duration_ba;
549 buf->data.frame_control =
550 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
551
552 ether_addr_copy(buf->data.ra, priv->current_net_addr);
553
554 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
555}
556
557static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
558 union vnt_tx_data_head *head)
559{
560 struct vnt_private *priv = tx_context->priv;
561 struct vnt_cts *buf = &head->cts_g;
562 u32 cts_frame_len = 14;
563 u16 current_rate = tx_context->tx_rate;
564
565 /* Get SignalField,ServiceField,Length */
566 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
567 PK_TYPE_11B, &buf->b);
568 /* Get CTSDuration_ba */
569 buf->duration_ba =
570 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
571 tx_context->pkt_type,
572 current_rate);
573 /*Get CTS Frame body*/
574 buf->data.duration = buf->duration_ba;
575 buf->data.frame_control =
576 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
577
578 ether_addr_copy(buf->data.ra, priv->current_net_addr);
579
580 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
581}
582
583static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
584 union vnt_tx_head *tx_head, bool need_mic)
585{
586 struct vnt_private *priv = tx_context->priv;
587 struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
588 union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
589 u32 frame_len = tx_context->frame_len;
590 u16 current_rate = tx_context->tx_rate;
591 u8 need_ack = tx_context->need_ack;
592
593 buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
594 tx_context->pkt_type, frame_len, current_rate);
595 buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
596 tx_context->pkt_type, frame_len, current_rate);
597 buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
598 tx_context->pkt_type, frame_len, current_rate);
599
600 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
601 frame_len, current_rate,
602 need_ack);
603 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
604 priv->top_cck_basic_rate, need_ack);
605
606 if (need_mic)
607 head = &tx_head->tx_rts.tx.mic.head;
608
609 if (tx_context->fb_option)
610 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
611
612 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
613}
614
615static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
616 union vnt_tx_head *tx_head, bool need_mic)
617{
618 struct vnt_private *priv = tx_context->priv;
619 struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
620 union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
621 u32 frame_len = tx_context->frame_len;
622 u16 current_rate = tx_context->tx_rate;
623 u8 need_ack = tx_context->need_ack;
624
625 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
626 frame_len, current_rate, need_ack);
627 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
628 frame_len, priv->top_cck_basic_rate, need_ack);
629
630 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
631 tx_context->pkt_type, frame_len, current_rate);
632
633 if (need_mic)
634 head = &tx_head->tx_cts.tx.mic.head;
635
636 /* Fill CTS */
637 if (tx_context->fb_option)
638 return vnt_fill_cts_fb_head(tx_context, head);
639
640 return vnt_fill_cts_head(tx_context, head);
641}
642
643static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
644 union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
645{
646 struct vnt_private *priv = tx_context->priv;
647 struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
648 union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
649 u32 frame_len = tx_context->frame_len;
650 u16 current_rate = tx_context->tx_rate;
651 u8 need_ack = tx_context->need_ack;
652
653 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
654 frame_len, current_rate, need_ack);
655
656 if (need_mic)
657 head = &tx_head->tx_ab.tx.mic.head;
658
659 if (need_rts) {
660 if (tx_context->pkt_type == PK_TYPE_11B)
661 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
662 tx_context->pkt_type, frame_len, current_rate);
663 else /* PK_TYPE_11A */
664 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
665 tx_context->pkt_type, frame_len, current_rate);
666
667 if (tx_context->fb_option &&
668 tx_context->pkt_type == PK_TYPE_11A)
669 return vnt_rxtx_rts_a_fb_head(tx_context,
670 &head->rts_a_fb);
671
672 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
673 }
674
675 if (tx_context->pkt_type == PK_TYPE_11A)
676 return vnt_rxtx_datahead_a_fb(tx_context,
677 &head->data_head_a_fb);
678
679 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
680}
681
682static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
683 struct vnt_tx_buffer *tx_buffer,
684 struct vnt_mic_hdr **mic_hdr, u32 need_mic,
685 bool need_rts)
686{
687
688 if (tx_context->pkt_type == PK_TYPE_11GB ||
689 tx_context->pkt_type == PK_TYPE_11GA) {
690 if (need_rts) {
691 if (need_mic)
692 *mic_hdr = &tx_buffer->
693 tx_head.tx_rts.tx.mic.hdr;
694
695 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
696 need_mic);
697 }
698
699 if (need_mic)
700 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
701
702 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
703 }
704
705 if (need_mic)
706 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
707
708 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
709}
710
711static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
712 u8 *key_buffer, struct ieee80211_key_conf *tx_key, struct sk_buff *skb,
713 u16 payload_len, struct vnt_mic_hdr *mic_hdr)
714{
715 struct ieee80211_hdr *hdr = tx_context->hdr;
716 struct ieee80211_key_seq seq;
717 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
718
719 /* strip header and icv len from payload */
720 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
721 payload_len -= tx_key->icv_len;
722
723 switch (tx_key->cipher) {
724 case WLAN_CIPHER_SUITE_WEP40:
725 case WLAN_CIPHER_SUITE_WEP104:
726 memcpy(key_buffer, iv, 3);
727 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
728
729 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
730 memcpy(key_buffer + 8, iv, 3);
731 memcpy(key_buffer + 11,
732 tx_key->key, WLAN_KEY_LEN_WEP40);
733 }
734
735 break;
736 case WLAN_CIPHER_SUITE_TKIP:
737 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
738
739 break;
740 case WLAN_CIPHER_SUITE_CCMP:
741
742 if (!mic_hdr)
743 return;
744
745 mic_hdr->id = 0x59;
746 mic_hdr->payload_len = cpu_to_be16(payload_len);
747 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
748
749 ieee80211_get_key_tx_seq(tx_key, &seq);
750
751 memcpy(mic_hdr->ccmp_pn, seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
752
753 if (ieee80211_has_a4(hdr->frame_control))
754 mic_hdr->hlen = cpu_to_be16(28);
755 else
756 mic_hdr->hlen = cpu_to_be16(22);
757
758 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
759 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
760 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
761
762 mic_hdr->frame_control = cpu_to_le16(
763 le16_to_cpu(hdr->frame_control) & 0xc78f);
764 mic_hdr->seq_ctrl = cpu_to_le16(
765 le16_to_cpu(hdr->seq_ctrl) & 0xf);
766
767 if (ieee80211_has_a4(hdr->frame_control))
768 ether_addr_copy(mic_hdr->addr4, hdr->addr4);
769
770
771 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
772
773 break;
774 default:
775 break;
776 }
777
778}
779
780int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
781{
782 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
783 struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
784 struct ieee80211_rate *rate;
785 struct ieee80211_key_conf *tx_key;
786 struct ieee80211_hdr *hdr;
787 struct vnt_mic_hdr *mic_hdr = NULL;
788 struct vnt_tx_buffer *tx_buffer;
789 struct vnt_tx_fifo_head *tx_buffer_head;
790 struct vnt_usb_send_context *tx_context;
791 unsigned long flags;
792 u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
793 u8 pkt_type, fb_option = AUTO_FB_NONE;
794 bool need_rts = false, is_pspoll = false;
795 bool need_mic = false;
796
797 hdr = (struct ieee80211_hdr *)(skb->data);
798
799 rate = ieee80211_get_tx_rate(priv->hw, info);
800
801 current_rate = rate->hw_value;
802 if (priv->current_rate != current_rate &&
803 !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
804 priv->current_rate = current_rate;
805 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
806 }
807
808 if (current_rate > RATE_11M) {
809 if (info->band == IEEE80211_BAND_5GHZ) {
810 pkt_type = PK_TYPE_11A;
811 } else {
812 if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
813 pkt_type = PK_TYPE_11GB;
814 else
815 pkt_type = PK_TYPE_11GA;
816 }
817 } else {
818 pkt_type = PK_TYPE_11B;
819 }
820
821 spin_lock_irqsave(&priv->lock, flags);
822
823 tx_context = vnt_get_free_context(priv);
824 if (!tx_context) {
825 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
826 spin_unlock_irqrestore(&priv->lock, flags);
827 return -ENOMEM;
828 }
829
830 tx_context->skb = skb;
831 tx_context->pkt_type = pkt_type;
832 tx_context->need_ack = false;
833 tx_context->frame_len = skb->len + 4;
834 tx_context->tx_rate = current_rate;
835
836 spin_unlock_irqrestore(&priv->lock, flags);
837
838 tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
839 tx_buffer_head = &tx_buffer->fifo_head;
840 tx_body_size = skb->len;
841
842 /*Set fifo controls */
843 if (pkt_type == PK_TYPE_11A)
844 tx_buffer_head->fifo_ctl = 0;
845 else if (pkt_type == PK_TYPE_11B)
846 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
847 else if (pkt_type == PK_TYPE_11GB)
848 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
849 else if (pkt_type == PK_TYPE_11GA)
850 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
851
852 if (!ieee80211_is_data(hdr->frame_control)) {
853 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
854 FIFOCTL_ISDMA0);
855 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
856
857 tx_buffer_head->time_stamp =
858 cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
859 } else {
860 tx_buffer_head->time_stamp =
861 cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
862 }
863
864 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
865 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
866 tx_context->need_ack = true;
867 }
868
869 if (ieee80211_has_retry(hdr->frame_control))
870 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
871
872 if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
873 priv->preamble_type = PREAMBLE_SHORT;
874 else
875 priv->preamble_type = PREAMBLE_LONG;
876
877 if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
878 need_rts = true;
879 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
880 }
881
882 if (ieee80211_has_a4(hdr->frame_control))
883 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
884
885 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
886 is_pspoll = true;
887
888 tx_buffer_head->frag_ctl =
889 cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
890
891 if (info->control.hw_key) {
892 tx_key = info->control.hw_key;
893 switch (info->control.hw_key->cipher) {
894 case WLAN_CIPHER_SUITE_WEP40:
895 case WLAN_CIPHER_SUITE_WEP104:
896 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
897 break;
898 case WLAN_CIPHER_SUITE_TKIP:
899 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
900 break;
901 case WLAN_CIPHER_SUITE_CCMP:
902 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
903 need_mic = true;
904 default:
905 break;
906 }
907 tx_context->frame_len += tx_key->icv_len;
908 }
909
910 tx_buffer_head->current_rate = cpu_to_le16(current_rate);
911
912 /* legacy rates TODO use ieee80211_tx_rate */
913 if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
914 if (priv->auto_fb_ctrl == AUTO_FB_0) {
915 tx_buffer_head->fifo_ctl |=
916 cpu_to_le16(FIFOCTL_AUTO_FB_0);
917
918 priv->tx_rate_fb0 =
919 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
920 priv->tx_rate_fb1 =
921 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
922
923 fb_option = AUTO_FB_0;
924 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
925 tx_buffer_head->fifo_ctl |=
926 cpu_to_le16(FIFOCTL_AUTO_FB_1);
927
928 priv->tx_rate_fb0 =
929 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
930 priv->tx_rate_fb1 =
931 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
932
933 fb_option = AUTO_FB_1;
934 }
935 }
936
937 tx_context->fb_option = fb_option;
938
939 duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
940 need_mic, need_rts);
941
942 tx_header_size = tx_context->tx_hdr_size;
943 if (!tx_header_size) {
944 tx_context->in_use = false;
945 return -ENOMEM;
946 }
947
948 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
949
950 tx_bytes = tx_header_size + tx_body_size;
951
952 memcpy(tx_context->hdr, skb->data, tx_body_size);
953
954 hdr->duration_id = cpu_to_le16(duration_id);
955
956 if (info->control.hw_key) {
957 tx_key = info->control.hw_key;
958 if (tx_key->keylen > 0)
959 vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
960 tx_key, skb, tx_body_size, mic_hdr);
961 }
962
963 priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
964 IEEE80211_SCTL_SEQ) >> 4;
965
966 tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
967 tx_buffer->pkt_no = tx_context->pkt_no;
968 tx_buffer->type = 0x00;
969
970 tx_bytes += 4;
971
972 tx_context->type = CONTEXT_DATA_PACKET;
973 tx_context->buf_len = tx_bytes;
974
975 spin_lock_irqsave(&priv->lock, flags);
976
977 if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
978 spin_unlock_irqrestore(&priv->lock, flags);
979 return -EIO;
980 }
981
982 spin_unlock_irqrestore(&priv->lock, flags);
983
984 return 0;
985}
986
987static int vnt_beacon_xmit(struct vnt_private *priv,
988 struct sk_buff *skb)
989{
990 struct vnt_beacon_buffer *beacon_buffer;
991 struct vnt_tx_short_buf_head *short_head;
992 struct ieee80211_tx_info *info;
993 struct vnt_usb_send_context *context;
994 struct ieee80211_mgmt *mgmt_hdr;
995 unsigned long flags;
996 u32 frame_size = skb->len + 4;
997 u16 current_rate, count;
998
999 spin_lock_irqsave(&priv->lock, flags);
1000
1001 context = vnt_get_free_context(priv);
1002 if (!context) {
1003 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
1004 spin_unlock_irqrestore(&priv->lock, flags);
1005 return -ENOMEM;
1006 }
1007
1008 context->skb = skb;
1009
1010 spin_unlock_irqrestore(&priv->lock, flags);
1011
1012 beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1013 short_head = &beacon_buffer->short_head;
1014
1015 if (priv->bb_type == BB_TYPE_11A) {
1016 current_rate = RATE_6M;
1017
1018 /* Get SignalField,ServiceField,Length */
1019 vnt_get_phy_field(priv, frame_size, current_rate,
1020 PK_TYPE_11A, &short_head->ab);
1021
1022 /* Get Duration and TimeStampOff */
1023 short_head->duration = vnt_get_duration_le(priv,
1024 PK_TYPE_11A, false);
1025 short_head->time_stamp_off =
1026 vnt_time_stamp_off(priv, current_rate);
1027 } else {
1028 current_rate = RATE_1M;
1029 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1030
1031 /* Get SignalField,ServiceField,Length */
1032 vnt_get_phy_field(priv, frame_size, current_rate,
1033 PK_TYPE_11B, &short_head->ab);
1034
1035 /* Get Duration and TimeStampOff */
1036 short_head->duration = vnt_get_duration_le(priv,
1037 PK_TYPE_11B, false);
1038 short_head->time_stamp_off =
1039 vnt_time_stamp_off(priv, current_rate);
1040 }
1041
1042 /* Generate Beacon Header */
1043 mgmt_hdr = &beacon_buffer->mgmt_hdr;
1044 memcpy(mgmt_hdr, skb->data, skb->len);
1045
1046 /* time stamp always 0 */
1047 mgmt_hdr->u.beacon.timestamp = 0;
1048
1049 info = IEEE80211_SKB_CB(skb);
1050 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1051 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1052
1053 hdr->duration_id = 0;
1054 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1055 }
1056
1057 priv->seq_counter++;
1058 if (priv->seq_counter > 0x0fff)
1059 priv->seq_counter = 0;
1060
1061 count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1062
1063 beacon_buffer->tx_byte_count = cpu_to_le16(count);
1064 beacon_buffer->pkt_no = context->pkt_no;
1065 beacon_buffer->type = 0x01;
1066
1067 context->type = CONTEXT_BEACON_PACKET;
1068 context->buf_len = count + 4; /* USB header */
1069
1070 spin_lock_irqsave(&priv->lock, flags);
1071
1072 if (vnt_tx_context(priv, context) != STATUS_PENDING)
1073 ieee80211_free_txskb(priv->hw, context->skb);
1074
1075 spin_unlock_irqrestore(&priv->lock, flags);
1076
1077 return 0;
1078}
1079
1080int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1081{
1082 struct sk_buff *beacon;
1083
1084 beacon = ieee80211_beacon_get(priv->hw, vif);
1085 if (!beacon)
1086 return -ENOMEM;
1087
1088 if (vnt_beacon_xmit(priv, beacon)) {
1089 ieee80211_free_txskb(priv->hw, beacon);
1090 return -ENODEV;
1091 }
1092
1093 return 0;
1094}
1095
1096int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1097 struct ieee80211_bss_conf *conf)
1098{
1099 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1100
1101 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1102
1103 vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1104
1105 vnt_clear_current_tsf(priv);
1106
1107 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1108
1109 vnt_reset_next_tbtt(priv, conf->beacon_int);
1110
1111 return vnt_beacon_make(priv, vif);
1112}
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