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
44 static 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
52 static 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
57 static 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
77 static struct vnt_usb_send_context
vnt_get_free_context(struct vnt_private * priv)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
vnt_time_stamp_off(struct vnt_private * priv,u16 rate)110 static __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
vnt_get_rsvtime(struct vnt_private * priv,u8 pkt_type,u32 frame_length,u16 rate,int need_ack)116 static 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
vnt_rxtx_rsvtime_le16(struct vnt_private * priv,u8 pkt_type,u32 frame_length,u16 rate,int need_ack)137 static __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
vnt_get_rtscts_rsvtime_le(struct vnt_private * priv,u8 rsv_type,u8 pkt_type,u32 frame_length,u16 current_rate)144 static __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
vnt_get_duration_le(struct vnt_private * priv,u8 pkt_type,int need_ack)197 static __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
vnt_get_rtscts_duration_le(struct vnt_usb_send_context * context,u8 dur_type,u8 pkt_type,u16 rate)218 static __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
vnt_mac_hdr_pos(struct vnt_usb_send_context * tx_context,struct ieee80211_hdr * hdr)262 static 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
vnt_rxtx_datahead_g(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_g * buf)275 static 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_nullfunc(hdr->frame_control)) {
292 buf->duration_a = hdr->duration_id;
293 buf->duration_b = hdr->duration_id;
294 } else {
295 buf->duration_a = vnt_get_duration_le(priv,
296 tx_context->pkt_type, need_ack);
297 buf->duration_b = vnt_get_duration_le(priv,
298 PK_TYPE_11B, need_ack);
299 }
300
301 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
302 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
303 priv->top_cck_basic_rate);
304
305 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
306
307 return le16_to_cpu(buf->duration_a);
308 }
309
vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_g_fb * buf)310 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
311 struct vnt_tx_datahead_g_fb *buf)
312 {
313 struct vnt_private *priv = tx_context->priv;
314 u32 frame_len = tx_context->frame_len;
315 u16 rate = tx_context->tx_rate;
316 u8 need_ack = tx_context->need_ack;
317
318 /* Get SignalField,ServiceField,Length */
319 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
320
321 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
322 PK_TYPE_11B, &buf->b);
323
324 /* Get Duration and TimeStamp */
325 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
326 need_ack);
327 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
328
329 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
330 need_ack);
331 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
332 need_ack);
333
334 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
335 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
336 priv->top_cck_basic_rate);
337
338 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
339
340 return le16_to_cpu(buf->duration_a);
341 }
342
vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_a_fb * buf)343 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
344 struct vnt_tx_datahead_a_fb *buf)
345 {
346 struct vnt_private *priv = tx_context->priv;
347 u16 rate = tx_context->tx_rate;
348 u8 pkt_type = tx_context->pkt_type;
349 u8 need_ack = tx_context->need_ack;
350 u32 frame_len = tx_context->frame_len;
351
352 /* Get SignalField,ServiceField,Length */
353 vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
354 /* Get Duration and TimeStampOff */
355 buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
356
357 buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
358 buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
359
360 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
361
362 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
363
364 return le16_to_cpu(buf->duration);
365 }
366
vnt_rxtx_datahead_ab(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_ab * buf)367 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
368 struct vnt_tx_datahead_ab *buf)
369 {
370 struct vnt_private *priv = tx_context->priv;
371 struct ieee80211_hdr *hdr =
372 (struct ieee80211_hdr *)tx_context->skb->data;
373 u32 frame_len = tx_context->frame_len;
374 u16 rate = tx_context->tx_rate;
375 u8 need_ack = tx_context->need_ack;
376
377 /* Get SignalField,ServiceField,Length */
378 vnt_get_phy_field(priv, frame_len, rate,
379 tx_context->pkt_type, &buf->ab);
380
381 /* Get Duration and TimeStampOff */
382 if (ieee80211_is_nullfunc(hdr->frame_control)) {
383 buf->duration = hdr->duration_id;
384 } else {
385 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
386 need_ack);
387 }
388
389 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
390
391 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
392
393 return le16_to_cpu(buf->duration);
394 }
395
vnt_fill_ieee80211_rts(struct vnt_usb_send_context * tx_context,struct ieee80211_rts * rts,__le16 duration)396 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
397 struct ieee80211_rts *rts, __le16 duration)
398 {
399 struct ieee80211_hdr *hdr =
400 (struct ieee80211_hdr *)tx_context->skb->data;
401
402 rts->duration = duration;
403 rts->frame_control =
404 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
405
406 ether_addr_copy(rts->ra, hdr->addr1);
407 ether_addr_copy(rts->ta, hdr->addr2);
408
409 return 0;
410 }
411
vnt_rxtx_rts_g_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_g * buf)412 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
413 struct vnt_rts_g *buf)
414 {
415 struct vnt_private *priv = tx_context->priv;
416 u16 rts_frame_len = 20;
417 u16 current_rate = tx_context->tx_rate;
418
419 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
420 PK_TYPE_11B, &buf->b);
421 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
422 tx_context->pkt_type, &buf->a);
423
424 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
425 PK_TYPE_11B,
426 priv->top_cck_basic_rate);
427 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
428 tx_context->pkt_type,
429 current_rate);
430 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
431 tx_context->pkt_type,
432 current_rate);
433
434 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
435
436 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
437 }
438
vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_g_fb * buf)439 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
440 struct vnt_rts_g_fb *buf)
441 {
442 struct vnt_private *priv = tx_context->priv;
443 u16 current_rate = tx_context->tx_rate;
444 u16 rts_frame_len = 20;
445
446 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
447 PK_TYPE_11B, &buf->b);
448 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
449 tx_context->pkt_type, &buf->a);
450
451 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
452 PK_TYPE_11B,
453 priv->top_cck_basic_rate);
454 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
455 tx_context->pkt_type,
456 current_rate);
457 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
458 tx_context->pkt_type,
459 current_rate);
460
461 buf->rts_duration_ba_f0 =
462 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
463 tx_context->pkt_type,
464 priv->tx_rate_fb0);
465 buf->rts_duration_aa_f0 =
466 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
467 tx_context->pkt_type,
468 priv->tx_rate_fb0);
469 buf->rts_duration_ba_f1 =
470 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
471 tx_context->pkt_type,
472 priv->tx_rate_fb1);
473 buf->rts_duration_aa_f1 =
474 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
475 tx_context->pkt_type,
476 priv->tx_rate_fb1);
477
478 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
479
480 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
481 }
482
vnt_rxtx_rts_ab_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_ab * buf)483 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
484 struct vnt_rts_ab *buf)
485 {
486 struct vnt_private *priv = tx_context->priv;
487 u16 current_rate = tx_context->tx_rate;
488 u16 rts_frame_len = 20;
489
490 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
491 tx_context->pkt_type, &buf->ab);
492
493 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
494 tx_context->pkt_type,
495 current_rate);
496
497 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
498
499 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
500 }
501
vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_a_fb * buf)502 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
503 struct vnt_rts_a_fb *buf)
504 {
505 struct vnt_private *priv = tx_context->priv;
506 u16 current_rate = tx_context->tx_rate;
507 u16 rts_frame_len = 20;
508
509 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
510 tx_context->pkt_type, &buf->a);
511
512 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
513 tx_context->pkt_type,
514 current_rate);
515
516 buf->rts_duration_f0 =
517 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
518 tx_context->pkt_type,
519 priv->tx_rate_fb0);
520
521 buf->rts_duration_f1 =
522 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
523 tx_context->pkt_type,
524 priv->tx_rate_fb1);
525
526 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
527
528 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
529 }
530
vnt_fill_cts_fb_head(struct vnt_usb_send_context * tx_context,union vnt_tx_data_head * head)531 static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
532 union vnt_tx_data_head *head)
533 {
534 struct vnt_private *priv = tx_context->priv;
535 struct vnt_cts_fb *buf = &head->cts_g_fb;
536 u32 cts_frame_len = 14;
537 u16 current_rate = tx_context->tx_rate;
538
539 /* Get SignalField,ServiceField,Length */
540 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
541 PK_TYPE_11B, &buf->b);
542
543 buf->duration_ba =
544 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
545 tx_context->pkt_type,
546 current_rate);
547 /* Get CTSDuration_ba_f0 */
548 buf->cts_duration_ba_f0 =
549 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
550 tx_context->pkt_type,
551 priv->tx_rate_fb0);
552 /* Get CTSDuration_ba_f1 */
553 buf->cts_duration_ba_f1 =
554 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
555 tx_context->pkt_type,
556 priv->tx_rate_fb1);
557 /* Get CTS Frame body */
558 buf->data.duration = buf->duration_ba;
559 buf->data.frame_control =
560 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
561
562 ether_addr_copy(buf->data.ra, priv->current_net_addr);
563
564 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
565 }
566
vnt_fill_cts_head(struct vnt_usb_send_context * tx_context,union vnt_tx_data_head * head)567 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
568 union vnt_tx_data_head *head)
569 {
570 struct vnt_private *priv = tx_context->priv;
571 struct vnt_cts *buf = &head->cts_g;
572 u32 cts_frame_len = 14;
573 u16 current_rate = tx_context->tx_rate;
574
575 /* Get SignalField,ServiceField,Length */
576 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
577 PK_TYPE_11B, &buf->b);
578 /* Get CTSDuration_ba */
579 buf->duration_ba =
580 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
581 tx_context->pkt_type,
582 current_rate);
583 /*Get CTS Frame body*/
584 buf->data.duration = buf->duration_ba;
585 buf->data.frame_control =
586 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
587
588 ether_addr_copy(buf->data.ra, priv->current_net_addr);
589
590 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
591 }
592
vnt_rxtx_rts(struct vnt_usb_send_context * tx_context,union vnt_tx_head * tx_head,bool need_mic)593 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
594 union vnt_tx_head *tx_head, bool need_mic)
595 {
596 struct vnt_private *priv = tx_context->priv;
597 struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
598 union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
599 u32 frame_len = tx_context->frame_len;
600 u16 current_rate = tx_context->tx_rate;
601 u8 need_ack = tx_context->need_ack;
602
603 buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
604 tx_context->pkt_type, frame_len, current_rate);
605 buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
606 tx_context->pkt_type, frame_len, current_rate);
607 buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
608 tx_context->pkt_type, frame_len, current_rate);
609
610 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
611 frame_len, current_rate,
612 need_ack);
613 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
614 priv->top_cck_basic_rate, need_ack);
615
616 if (need_mic)
617 head = &tx_head->tx_rts.tx.mic.head;
618
619 if (tx_context->fb_option)
620 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
621
622 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
623 }
624
vnt_rxtx_cts(struct vnt_usb_send_context * tx_context,union vnt_tx_head * tx_head,bool need_mic)625 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
626 union vnt_tx_head *tx_head, bool need_mic)
627 {
628 struct vnt_private *priv = tx_context->priv;
629 struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
630 union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
631 u32 frame_len = tx_context->frame_len;
632 u16 current_rate = tx_context->tx_rate;
633 u8 need_ack = tx_context->need_ack;
634
635 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
636 frame_len, current_rate, need_ack);
637 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
638 frame_len, priv->top_cck_basic_rate, need_ack);
639
640 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
641 tx_context->pkt_type, frame_len, current_rate);
642
643 if (need_mic)
644 head = &tx_head->tx_cts.tx.mic.head;
645
646 /* Fill CTS */
647 if (tx_context->fb_option)
648 return vnt_fill_cts_fb_head(tx_context, head);
649
650 return vnt_fill_cts_head(tx_context, head);
651 }
652
vnt_rxtx_ab(struct vnt_usb_send_context * tx_context,union vnt_tx_head * tx_head,bool need_rts,bool need_mic)653 static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
654 union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
655 {
656 struct vnt_private *priv = tx_context->priv;
657 struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
658 union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
659 u32 frame_len = tx_context->frame_len;
660 u16 current_rate = tx_context->tx_rate;
661 u8 need_ack = tx_context->need_ack;
662
663 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
664 frame_len, current_rate, need_ack);
665
666 if (need_mic)
667 head = &tx_head->tx_ab.tx.mic.head;
668
669 if (need_rts) {
670 if (tx_context->pkt_type == PK_TYPE_11B)
671 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
672 tx_context->pkt_type, frame_len, current_rate);
673 else /* PK_TYPE_11A */
674 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
675 tx_context->pkt_type, frame_len, current_rate);
676
677 if (tx_context->fb_option &&
678 tx_context->pkt_type == PK_TYPE_11A)
679 return vnt_rxtx_rts_a_fb_head(tx_context,
680 &head->rts_a_fb);
681
682 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
683 }
684
685 if (tx_context->pkt_type == PK_TYPE_11A)
686 return vnt_rxtx_datahead_a_fb(tx_context,
687 &head->data_head_a_fb);
688
689 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
690 }
691
vnt_generate_tx_parameter(struct vnt_usb_send_context * tx_context,struct vnt_tx_buffer * tx_buffer,struct vnt_mic_hdr ** mic_hdr,u32 need_mic,bool need_rts)692 static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
693 struct vnt_tx_buffer *tx_buffer,
694 struct vnt_mic_hdr **mic_hdr, u32 need_mic,
695 bool need_rts)
696 {
697 if (tx_context->pkt_type == PK_TYPE_11GB ||
698 tx_context->pkt_type == PK_TYPE_11GA) {
699 if (need_rts) {
700 if (need_mic)
701 *mic_hdr =
702 &tx_buffer->tx_head.tx_rts.tx.mic.hdr;
703
704 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
705 need_mic);
706 }
707
708 if (need_mic)
709 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
710
711 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
712 }
713
714 if (need_mic)
715 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
716
717 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
718 }
719
vnt_fill_txkey(struct vnt_usb_send_context * tx_context,u8 * key_buffer,struct ieee80211_key_conf * tx_key,struct sk_buff * skb,u16 payload_len,struct vnt_mic_hdr * mic_hdr)720 static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
721 u8 *key_buffer, struct ieee80211_key_conf *tx_key,
722 struct sk_buff *skb, u16 payload_len,
723 struct vnt_mic_hdr *mic_hdr)
724 {
725 struct ieee80211_hdr *hdr = tx_context->hdr;
726 u64 pn64;
727 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
728
729 /* strip header and icv len from payload */
730 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
731 payload_len -= tx_key->icv_len;
732
733 switch (tx_key->cipher) {
734 case WLAN_CIPHER_SUITE_WEP40:
735 case WLAN_CIPHER_SUITE_WEP104:
736 memcpy(key_buffer, iv, 3);
737 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
738
739 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
740 memcpy(key_buffer + 8, iv, 3);
741 memcpy(key_buffer + 11,
742 tx_key->key, WLAN_KEY_LEN_WEP40);
743 }
744
745 break;
746 case WLAN_CIPHER_SUITE_TKIP:
747 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
748
749 break;
750 case WLAN_CIPHER_SUITE_CCMP:
751
752 if (!mic_hdr)
753 return;
754
755 mic_hdr->id = 0x59;
756 mic_hdr->payload_len = cpu_to_be16(payload_len);
757 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
758
759 pn64 = atomic64_read(&tx_key->tx_pn);
760 mic_hdr->ccmp_pn[5] = pn64;
761 mic_hdr->ccmp_pn[4] = pn64 >> 8;
762 mic_hdr->ccmp_pn[3] = pn64 >> 16;
763 mic_hdr->ccmp_pn[2] = pn64 >> 24;
764 mic_hdr->ccmp_pn[1] = pn64 >> 32;
765 mic_hdr->ccmp_pn[0] = pn64 >> 40;
766
767 if (ieee80211_has_a4(hdr->frame_control))
768 mic_hdr->hlen = cpu_to_be16(28);
769 else
770 mic_hdr->hlen = cpu_to_be16(22);
771
772 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
773 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
774 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
775
776 mic_hdr->frame_control = cpu_to_le16(
777 le16_to_cpu(hdr->frame_control) & 0xc78f);
778 mic_hdr->seq_ctrl = cpu_to_le16(
779 le16_to_cpu(hdr->seq_ctrl) & 0xf);
780
781 if (ieee80211_has_a4(hdr->frame_control))
782 ether_addr_copy(mic_hdr->addr4, hdr->addr4);
783
784 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
785
786 break;
787 default:
788 break;
789 }
790 }
791
vnt_tx_packet(struct vnt_private * priv,struct sk_buff * skb)792 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
793 {
794 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
795 struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
796 struct ieee80211_rate *rate;
797 struct ieee80211_key_conf *tx_key;
798 struct ieee80211_hdr *hdr;
799 struct vnt_mic_hdr *mic_hdr = NULL;
800 struct vnt_tx_buffer *tx_buffer;
801 struct vnt_tx_fifo_head *tx_buffer_head;
802 struct vnt_usb_send_context *tx_context;
803 unsigned long flags;
804 u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
805 u8 pkt_type, fb_option = AUTO_FB_NONE;
806 bool need_rts = false, is_pspoll = false;
807 bool need_mic = false;
808
809 hdr = (struct ieee80211_hdr *)(skb->data);
810
811 rate = ieee80211_get_tx_rate(priv->hw, info);
812
813 current_rate = rate->hw_value;
814 if (priv->current_rate != current_rate &&
815 !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
816 priv->current_rate = current_rate;
817 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
818 }
819
820 if (current_rate > RATE_11M) {
821 if (info->band == NL80211_BAND_5GHZ) {
822 pkt_type = PK_TYPE_11A;
823 } else {
824 if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
825 if (priv->basic_rates & VNT_B_RATES)
826 pkt_type = PK_TYPE_11GB;
827 else
828 pkt_type = PK_TYPE_11GA;
829 } else {
830 pkt_type = PK_TYPE_11A;
831 }
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
vnt_beacon_xmit(struct vnt_private * priv,struct sk_buff * skb)1003 static 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
vnt_beacon_make(struct vnt_private * priv,struct ieee80211_vif * vif)1095 int 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
vnt_beacon_enable(struct vnt_private * priv,struct ieee80211_vif * vif,struct ieee80211_bss_conf * conf)1111 int 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 }
1128