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 "device.h"
40 #include "rxtx.h"
41 #include "card.h"
42 #include "mac.h"
43 #include "rf.h"
44 #include "usbpipe.h"
45
46 static const u16 vnt_time_stampoff[2][MAX_RATE] = {
47 {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},/* Long Preamble */
48 {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},/* Short Preamble */
49 };
50
51 static const u16 vnt_fb_opt0[2][5] = {
52 {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */
53 {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */
54 };
55
56 static const u16 vnt_fb_opt1[2][5] = {
57 {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */
58 {RATE_6M , RATE_6M, RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */
59 };
60
61 #define RTSDUR_BB 0
62 #define RTSDUR_BA 1
63 #define RTSDUR_AA 2
64 #define CTSDUR_BA 3
65 #define RTSDUR_BA_F0 4
66 #define RTSDUR_AA_F0 5
67 #define RTSDUR_BA_F1 6
68 #define RTSDUR_AA_F1 7
69 #define CTSDUR_BA_F0 8
70 #define CTSDUR_BA_F1 9
71 #define DATADUR_B 10
72 #define DATADUR_A 11
73 #define DATADUR_A_F0 12
74 #define DATADUR_A_F1 13
75
76 static struct vnt_usb_send_context
vnt_get_free_context(struct vnt_private * priv)77 *vnt_get_free_context(struct vnt_private *priv)
78 {
79 struct vnt_usb_send_context *context = NULL;
80 int ii;
81
82 dev_dbg(&priv->usb->dev, "%s\n", __func__);
83
84 for (ii = 0; ii < priv->num_tx_context; ii++) {
85 if (!priv->tx_context[ii])
86 return NULL;
87
88 context = priv->tx_context[ii];
89 if (context->in_use == false) {
90 context->in_use = true;
91 memset(context->data, 0,
92 MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
93
94 context->hdr = NULL;
95
96 return context;
97 }
98 }
99
100 if (ii == priv->num_tx_context)
101 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
102
103 return NULL;
104 }
105
vnt_time_stamp_off(struct vnt_private * priv,u16 rate)106 static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
107 {
108 return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
109 [rate % MAX_RATE]);
110 }
111
vnt_get_rsvtime(struct vnt_private * priv,u8 pkt_type,u32 frame_length,u16 rate,int need_ack)112 static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
113 u32 frame_length, u16 rate, int need_ack)
114 {
115 u32 data_time, ack_time;
116
117 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
118 frame_length, rate);
119
120 if (pkt_type == PK_TYPE_11B)
121 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
122 14, (u16)priv->top_cck_basic_rate);
123 else
124 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
125 14, (u16)priv->top_ofdm_basic_rate);
126
127 if (need_ack)
128 return data_time + priv->sifs + ack_time;
129
130 return data_time;
131 }
132
vnt_rxtx_rsvtime_le16(struct vnt_private * priv,u8 pkt_type,u32 frame_length,u16 rate,int need_ack)133 static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
134 u32 frame_length, u16 rate, int need_ack)
135 {
136 return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
137 frame_length, rate, need_ack));
138 }
139
vnt_get_rtscts_rsvtime_le(struct vnt_private * priv,u8 rsv_type,u8 pkt_type,u32 frame_length,u16 current_rate)140 static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv,
141 u8 rsv_type, u8 pkt_type, u32 frame_length, u16 current_rate)
142 {
143 u32 rrv_time, rts_time, cts_time, ack_time, data_time;
144
145 rrv_time = rts_time = cts_time = ack_time = data_time = 0;
146
147 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
148 frame_length, current_rate);
149
150 if (rsv_type == 0) {
151 rts_time = vnt_get_frame_time(priv->preamble_type,
152 pkt_type, 20, priv->top_cck_basic_rate);
153 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
154 pkt_type, 14, priv->top_cck_basic_rate);
155 } else if (rsv_type == 1) {
156 rts_time = vnt_get_frame_time(priv->preamble_type,
157 pkt_type, 20, priv->top_cck_basic_rate);
158 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
159 14, priv->top_cck_basic_rate);
160 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
161 14, priv->top_ofdm_basic_rate);
162 } else if (rsv_type == 2) {
163 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
164 20, priv->top_ofdm_basic_rate);
165 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
166 pkt_type, 14, priv->top_ofdm_basic_rate);
167 } else if (rsv_type == 3) {
168 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
169 14, priv->top_cck_basic_rate);
170 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
171 14, priv->top_ofdm_basic_rate);
172
173 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
174
175 return cpu_to_le16((u16)rrv_time);
176 }
177
178 rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
179
180 return cpu_to_le16((u16)rrv_time);
181 }
182
vnt_get_duration_le(struct vnt_private * priv,u8 pkt_type,int need_ack)183 static __le16 vnt_get_duration_le(struct vnt_private *priv,
184 u8 pkt_type, int need_ack)
185 {
186 u32 ack_time = 0;
187
188 if (need_ack) {
189 if (pkt_type == PK_TYPE_11B)
190 ack_time = vnt_get_frame_time(priv->preamble_type,
191 pkt_type, 14, priv->top_cck_basic_rate);
192 else
193 ack_time = vnt_get_frame_time(priv->preamble_type,
194 pkt_type, 14, priv->top_ofdm_basic_rate);
195
196 return cpu_to_le16((u16)(priv->sifs + ack_time));
197 }
198
199 return 0;
200 }
201
vnt_get_rtscts_duration_le(struct vnt_usb_send_context * context,u8 dur_type,u8 pkt_type,u16 rate)202 static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
203 u8 dur_type, u8 pkt_type, u16 rate)
204 {
205 struct vnt_private *priv = context->priv;
206 u32 cts_time = 0, dur_time = 0;
207 u32 frame_length = context->frame_len;
208 u8 need_ack = context->need_ack;
209
210 switch (dur_type) {
211 case RTSDUR_BB:
212 case RTSDUR_BA:
213 case RTSDUR_BA_F0:
214 case RTSDUR_BA_F1:
215 cts_time = vnt_get_frame_time(priv->preamble_type,
216 pkt_type, 14, priv->top_cck_basic_rate);
217 dur_time = cts_time + 2 * priv->sifs +
218 vnt_get_rsvtime(priv, pkt_type,
219 frame_length, rate, need_ack);
220 break;
221
222 case RTSDUR_AA:
223 case RTSDUR_AA_F0:
224 case RTSDUR_AA_F1:
225 cts_time = vnt_get_frame_time(priv->preamble_type,
226 pkt_type, 14, priv->top_ofdm_basic_rate);
227 dur_time = cts_time + 2 * priv->sifs +
228 vnt_get_rsvtime(priv, pkt_type,
229 frame_length, rate, need_ack);
230 break;
231
232 case CTSDUR_BA:
233 case CTSDUR_BA_F0:
234 case CTSDUR_BA_F1:
235 dur_time = priv->sifs + vnt_get_rsvtime(priv,
236 pkt_type, frame_length, rate, need_ack);
237 break;
238
239 default:
240 break;
241 }
242
243 return cpu_to_le16((u16)dur_time);
244 }
245
vnt_mac_hdr_pos(struct vnt_usb_send_context * tx_context,struct ieee80211_hdr * hdr)246 static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
247 struct ieee80211_hdr *hdr)
248 {
249 u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
250 u8 *hdr_pos = (u8 *)hdr;
251
252 tx_context->hdr = hdr;
253 if (!tx_context->hdr)
254 return 0;
255
256 return (u16)(hdr_pos - head);
257 }
258
vnt_rxtx_datahead_g(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_g * buf)259 static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
260 struct vnt_tx_datahead_g *buf)
261 {
262
263 struct vnt_private *priv = tx_context->priv;
264 struct ieee80211_hdr *hdr =
265 (struct ieee80211_hdr *)tx_context->skb->data;
266 u32 frame_len = tx_context->frame_len;
267 u16 rate = tx_context->tx_rate;
268 u8 need_ack = tx_context->need_ack;
269
270 /* Get SignalField,ServiceField,Length */
271 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
272 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
273 PK_TYPE_11B, &buf->b);
274
275 /* Get Duration and TimeStamp */
276 if (ieee80211_is_pspoll(hdr->frame_control)) {
277 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
278
279 buf->duration_a = dur;
280 buf->duration_b = dur;
281 } else {
282 buf->duration_a = vnt_get_duration_le(priv,
283 tx_context->pkt_type, need_ack);
284 buf->duration_b = vnt_get_duration_le(priv,
285 PK_TYPE_11B, need_ack);
286 }
287
288 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
289 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
290 priv->top_cck_basic_rate);
291
292 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
293
294 return le16_to_cpu(buf->duration_a);
295 }
296
vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_g_fb * buf)297 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
298 struct vnt_tx_datahead_g_fb *buf)
299 {
300 struct vnt_private *priv = tx_context->priv;
301 u32 frame_len = tx_context->frame_len;
302 u16 rate = tx_context->tx_rate;
303 u8 need_ack = tx_context->need_ack;
304
305 /* Get SignalField,ServiceField,Length */
306 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
307
308 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
309 PK_TYPE_11B, &buf->b);
310
311 /* Get Duration and TimeStamp */
312 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
313 need_ack);
314 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
315
316 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
317 need_ack);
318 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
319 need_ack);
320
321 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
322 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
323 priv->top_cck_basic_rate);
324
325 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
326
327 return le16_to_cpu(buf->duration_a);
328 }
329
vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_a_fb * buf)330 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
331 struct vnt_tx_datahead_a_fb *buf)
332 {
333 struct vnt_private *priv = tx_context->priv;
334 u16 rate = tx_context->tx_rate;
335 u8 pkt_type = tx_context->pkt_type;
336 u8 need_ack = tx_context->need_ack;
337 u32 frame_len = tx_context->frame_len;
338
339 /* Get SignalField,ServiceField,Length */
340 vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
341 /* Get Duration and TimeStampOff */
342 buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
343
344 buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
345 buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
346
347 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
348
349 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
350
351 return le16_to_cpu(buf->duration);
352 }
353
vnt_rxtx_datahead_ab(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_ab * buf)354 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
355 struct vnt_tx_datahead_ab *buf)
356 {
357 struct vnt_private *priv = tx_context->priv;
358 struct ieee80211_hdr *hdr =
359 (struct ieee80211_hdr *)tx_context->skb->data;
360 u32 frame_len = tx_context->frame_len;
361 u16 rate = tx_context->tx_rate;
362 u8 need_ack = tx_context->need_ack;
363
364 /* Get SignalField,ServiceField,Length */
365 vnt_get_phy_field(priv, frame_len, rate,
366 tx_context->pkt_type, &buf->ab);
367
368 /* Get Duration and TimeStampOff */
369 if (ieee80211_is_pspoll(hdr->frame_control)) {
370 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
371
372 buf->duration = dur;
373 } else {
374 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
375 need_ack);
376 }
377
378 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
379
380 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
381
382 return le16_to_cpu(buf->duration);
383 }
384
vnt_fill_ieee80211_rts(struct vnt_usb_send_context * tx_context,struct ieee80211_rts * rts,__le16 duration)385 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
386 struct ieee80211_rts *rts, __le16 duration)
387 {
388 struct ieee80211_hdr *hdr =
389 (struct ieee80211_hdr *)tx_context->skb->data;
390
391 rts->duration = duration;
392 rts->frame_control =
393 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
394
395 memcpy(rts->ra, hdr->addr1, ETH_ALEN);
396 memcpy(rts->ta, hdr->addr2, ETH_ALEN);
397
398 return 0;
399 }
400
vnt_rxtx_rts_g_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_g * buf)401 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
402 struct vnt_rts_g *buf)
403 {
404 struct vnt_private *priv = tx_context->priv;
405 u16 rts_frame_len = 20;
406 u16 current_rate = tx_context->tx_rate;
407
408 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
409 PK_TYPE_11B, &buf->b);
410 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
411 tx_context->pkt_type, &buf->a);
412
413 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
414 PK_TYPE_11B,
415 priv->top_cck_basic_rate);
416 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
417 tx_context->pkt_type,
418 current_rate);
419 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
420 tx_context->pkt_type,
421 current_rate);
422
423 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
424
425 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
426 }
427
vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_g_fb * buf)428 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
429 struct vnt_rts_g_fb *buf)
430 {
431 struct vnt_private *priv = tx_context->priv;
432 u16 current_rate = tx_context->tx_rate;
433 u16 rts_frame_len = 20;
434
435 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
436 PK_TYPE_11B, &buf->b);
437 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
438 tx_context->pkt_type, &buf->a);
439
440 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
441 PK_TYPE_11B,
442 priv->top_cck_basic_rate);
443 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
444 tx_context->pkt_type,
445 current_rate);
446 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
447 tx_context->pkt_type,
448 current_rate);
449
450 buf->rts_duration_ba_f0 =
451 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
452 tx_context->pkt_type,
453 priv->tx_rate_fb0);
454 buf->rts_duration_aa_f0 =
455 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
456 tx_context->pkt_type,
457 priv->tx_rate_fb0);
458 buf->rts_duration_ba_f1 =
459 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
460 tx_context->pkt_type,
461 priv->tx_rate_fb1);
462 buf->rts_duration_aa_f1 =
463 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
464 tx_context->pkt_type,
465 priv->tx_rate_fb1);
466
467 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
468
469 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
470 }
471
vnt_rxtx_rts_ab_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_ab * buf)472 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
473 struct vnt_rts_ab *buf)
474 {
475 struct vnt_private *priv = tx_context->priv;
476 u16 current_rate = tx_context->tx_rate;
477 u16 rts_frame_len = 20;
478
479 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
480 tx_context->pkt_type, &buf->ab);
481
482 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
483 tx_context->pkt_type,
484 current_rate);
485
486 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
487
488 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
489 }
490
vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_a_fb * buf)491 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
492 struct vnt_rts_a_fb *buf)
493 {
494 struct vnt_private *priv = tx_context->priv;
495 u16 current_rate = tx_context->tx_rate;
496 u16 rts_frame_len = 20;
497
498 vnt_get_phy_field(priv, rts_frame_len,
499 priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a);
500
501 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
502 tx_context->pkt_type,
503 current_rate);
504
505 buf->rts_duration_f0 =
506 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
507 tx_context->pkt_type,
508 priv->tx_rate_fb0);
509
510 buf->rts_duration_f1 =
511 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
512 tx_context->pkt_type,
513 priv->tx_rate_fb1);
514
515 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
516
517 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
518 }
519
vnt_fill_cts_head(struct vnt_usb_send_context * tx_context,union vnt_tx_data_head * head)520 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
521 union vnt_tx_data_head *head)
522 {
523 struct vnt_private *priv = tx_context->priv;
524 u32 cts_frame_len = 14;
525 u16 current_rate = tx_context->tx_rate;
526
527 if (!head)
528 return 0;
529
530 if (tx_context->fb_option) {
531 /* Auto Fall back */
532 struct vnt_cts_fb *buf = &head->cts_g_fb;
533 /* Get SignalField,ServiceField,Length */
534 vnt_get_phy_field(priv, cts_frame_len,
535 priv->top_cck_basic_rate, PK_TYPE_11B, &buf->b);
536 buf->duration_ba =
537 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
538 tx_context->pkt_type,
539 current_rate);
540 /* Get CTSDuration_ba_f0 */
541 buf->cts_duration_ba_f0 =
542 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
543 tx_context->pkt_type,
544 priv->tx_rate_fb0);
545 /* Get CTSDuration_ba_f1 */
546 buf->cts_duration_ba_f1 =
547 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
548 tx_context->pkt_type,
549 priv->tx_rate_fb1);
550 /* Get CTS Frame body */
551 buf->data.duration = buf->duration_ba;
552 buf->data.frame_control =
553 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
554
555 memcpy(buf->data.ra, priv->current_net_addr, ETH_ALEN);
556
557 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
558 } else {
559 struct vnt_cts *buf = &head->cts_g;
560 /* Get SignalField,ServiceField,Length */
561 vnt_get_phy_field(priv, cts_frame_len,
562 priv->top_cck_basic_rate, PK_TYPE_11B, &buf->b);
563 /* Get CTSDuration_ba */
564 buf->duration_ba =
565 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
566 tx_context->pkt_type,
567 current_rate);
568 /*Get CTS Frame body*/
569 buf->data.duration = buf->duration_ba;
570 buf->data.frame_control =
571 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
572
573 memcpy(buf->data.ra, priv->current_net_addr, ETH_ALEN);
574
575 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
576 }
577
578 return 0;
579 }
580
vnt_rxtx_rts(struct vnt_usb_send_context * tx_context,union vnt_tx_head * tx_head,bool need_mic)581 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
582 union vnt_tx_head *tx_head, bool need_mic)
583 {
584 struct vnt_private *priv = tx_context->priv;
585 struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
586 union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
587 u32 frame_len = tx_context->frame_len;
588 u16 current_rate = tx_context->tx_rate;
589 u8 need_ack = tx_context->need_ack;
590
591 buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
592 tx_context->pkt_type, frame_len, current_rate);
593 buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
594 tx_context->pkt_type, frame_len, current_rate);
595 buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
596 tx_context->pkt_type, frame_len, current_rate);
597
598 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
599 frame_len, current_rate,
600 need_ack);
601 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
602 priv->top_cck_basic_rate, need_ack);
603
604 if (need_mic)
605 head = &tx_head->tx_rts.tx.mic.head;
606
607 if (tx_context->fb_option)
608 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
609
610 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
611 }
612
vnt_rxtx_cts(struct vnt_usb_send_context * tx_context,union vnt_tx_head * tx_head,bool need_mic)613 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
614 union vnt_tx_head *tx_head, bool need_mic)
615 {
616 struct vnt_private *priv = tx_context->priv;
617 struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
618 union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
619 u32 frame_len = tx_context->frame_len;
620 u16 current_rate = tx_context->tx_rate;
621 u8 need_ack = tx_context->need_ack;
622
623 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
624 frame_len, current_rate, need_ack);
625 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
626 frame_len, priv->top_cck_basic_rate, need_ack);
627
628 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
629 tx_context->pkt_type, frame_len, current_rate);
630
631 if (need_mic)
632 head = &tx_head->tx_cts.tx.mic.head;
633
634 /* Fill CTS */
635 return vnt_fill_cts_head(tx_context, head);
636 }
637
vnt_rxtx_ab(struct vnt_usb_send_context * tx_context,union vnt_tx_head * tx_head,bool need_rts,bool need_mic)638 static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
639 union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
640 {
641 struct vnt_private *priv = tx_context->priv;
642 struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
643 union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
644 u32 frame_len = tx_context->frame_len;
645 u16 current_rate = tx_context->tx_rate;
646 u8 need_ack = tx_context->need_ack;
647
648 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
649 frame_len, current_rate, need_ack);
650
651 if (need_mic)
652 head = &tx_head->tx_ab.tx.mic.head;
653
654 if (need_rts) {
655 if (tx_context->pkt_type == PK_TYPE_11B)
656 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
657 tx_context->pkt_type, frame_len, current_rate);
658 else /* PK_TYPE_11A */
659 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
660 tx_context->pkt_type, frame_len, current_rate);
661
662 if (tx_context->fb_option &&
663 tx_context->pkt_type == PK_TYPE_11A)
664 return vnt_rxtx_rts_a_fb_head(tx_context,
665 &head->rts_a_fb);
666
667 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
668 }
669
670 if (tx_context->pkt_type == PK_TYPE_11A)
671 return vnt_rxtx_datahead_a_fb(tx_context,
672 &head->data_head_a_fb);
673
674 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
675 }
676
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)677 static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
678 struct vnt_tx_buffer *tx_buffer,
679 struct vnt_mic_hdr **mic_hdr, u32 need_mic,
680 bool need_rts)
681 {
682
683 if (tx_context->pkt_type == PK_TYPE_11GB ||
684 tx_context->pkt_type == PK_TYPE_11GA) {
685 if (need_rts) {
686 if (need_mic)
687 *mic_hdr = &tx_buffer->
688 tx_head.tx_rts.tx.mic.hdr;
689
690 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
691 need_mic);
692 }
693
694 if (need_mic)
695 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
696
697 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
698 }
699
700 if (need_mic)
701 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
702
703 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
704 }
705
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)706 static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
707 u8 *key_buffer, struct ieee80211_key_conf *tx_key, struct sk_buff *skb,
708 u16 payload_len, struct vnt_mic_hdr *mic_hdr)
709 {
710 struct ieee80211_hdr *hdr = tx_context->hdr;
711 struct ieee80211_key_seq seq;
712 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
713
714 /* strip header and icv len from payload */
715 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
716 payload_len -= tx_key->icv_len;
717
718 switch (tx_key->cipher) {
719 case WLAN_CIPHER_SUITE_WEP40:
720 case WLAN_CIPHER_SUITE_WEP104:
721 memcpy(key_buffer, iv, 3);
722 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
723
724 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
725 memcpy(key_buffer + 8, iv, 3);
726 memcpy(key_buffer + 11,
727 tx_key->key, WLAN_KEY_LEN_WEP40);
728 }
729
730 break;
731 case WLAN_CIPHER_SUITE_TKIP:
732 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
733
734 break;
735 case WLAN_CIPHER_SUITE_CCMP:
736
737 if (!mic_hdr)
738 return;
739
740 mic_hdr->id = 0x59;
741 mic_hdr->payload_len = cpu_to_be16(payload_len);
742 memcpy(mic_hdr->mic_addr2, hdr->addr2, ETH_ALEN);
743
744 ieee80211_get_key_tx_seq(tx_key, &seq);
745
746 memcpy(mic_hdr->ccmp_pn, seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
747
748 if (ieee80211_has_a4(hdr->frame_control))
749 mic_hdr->hlen = cpu_to_be16(28);
750 else
751 mic_hdr->hlen = cpu_to_be16(22);
752
753 memcpy(mic_hdr->addr1, hdr->addr1, ETH_ALEN);
754 memcpy(mic_hdr->addr2, hdr->addr2, ETH_ALEN);
755 memcpy(mic_hdr->addr3, hdr->addr3, ETH_ALEN);
756
757 mic_hdr->frame_control = cpu_to_le16(
758 le16_to_cpu(hdr->frame_control) & 0xc78f);
759 mic_hdr->seq_ctrl = cpu_to_le16(
760 le16_to_cpu(hdr->seq_ctrl) & 0xf);
761
762 if (ieee80211_has_a4(hdr->frame_control))
763 memcpy(mic_hdr->addr4, hdr->addr4, ETH_ALEN);
764
765
766 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
767
768 break;
769 default:
770 break;
771 }
772
773 }
774
vnt_tx_packet(struct vnt_private * priv,struct sk_buff * skb)775 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
776 {
777 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
778 struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
779 struct ieee80211_rate *rate;
780 struct ieee80211_key_conf *tx_key;
781 struct ieee80211_hdr *hdr;
782 struct vnt_mic_hdr *mic_hdr = NULL;
783 struct vnt_tx_buffer *tx_buffer;
784 struct vnt_tx_fifo_head *tx_buffer_head;
785 struct vnt_usb_send_context *tx_context;
786 unsigned long flags;
787 u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
788 u8 pkt_type, fb_option = AUTO_FB_NONE;
789 bool need_rts = false, is_pspoll = false;
790 bool need_mic = false;
791
792 hdr = (struct ieee80211_hdr *)(skb->data);
793
794 rate = ieee80211_get_tx_rate(priv->hw, info);
795
796 current_rate = rate->hw_value;
797 if (priv->current_rate != current_rate &&
798 !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
799 priv->current_rate = current_rate;
800 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
801 }
802
803 if (current_rate > RATE_11M) {
804 if (info->band == IEEE80211_BAND_5GHZ) {
805 pkt_type = PK_TYPE_11A;
806 } else {
807 if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
808 pkt_type = PK_TYPE_11GB;
809 else
810 pkt_type = PK_TYPE_11GA;
811 }
812 } else {
813 pkt_type = PK_TYPE_11B;
814 }
815
816 spin_lock_irqsave(&priv->lock, flags);
817
818 tx_context = vnt_get_free_context(priv);
819 if (!tx_context) {
820 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
821 spin_unlock_irqrestore(&priv->lock, flags);
822 return -ENOMEM;
823 }
824
825 tx_context->skb = skb;
826 tx_context->pkt_type = pkt_type;
827 tx_context->need_ack = false;
828 tx_context->frame_len = skb->len + 4;
829 tx_context->tx_rate = current_rate;
830
831 spin_unlock_irqrestore(&priv->lock, flags);
832
833 tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
834 tx_buffer_head = &tx_buffer->fifo_head;
835 tx_body_size = skb->len;
836
837 /*Set fifo controls */
838 if (pkt_type == PK_TYPE_11A)
839 tx_buffer_head->fifo_ctl = 0;
840 else if (pkt_type == PK_TYPE_11B)
841 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
842 else if (pkt_type == PK_TYPE_11GB)
843 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
844 else if (pkt_type == PK_TYPE_11GA)
845 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
846
847 if (!ieee80211_is_data(hdr->frame_control)) {
848 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
849 FIFOCTL_ISDMA0);
850 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
851
852 tx_buffer_head->time_stamp =
853 cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
854 } else {
855 tx_buffer_head->time_stamp =
856 cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
857 }
858
859 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
860 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
861 tx_context->need_ack = true;
862 }
863
864 if (ieee80211_has_retry(hdr->frame_control))
865 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
866
867 if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
868 priv->preamble_type = PREAMBLE_SHORT;
869 else
870 priv->preamble_type = PREAMBLE_LONG;
871
872 if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
873 need_rts = true;
874 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
875 }
876
877 if (ieee80211_has_a4(hdr->frame_control))
878 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
879
880 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
881 is_pspoll = true;
882
883 tx_buffer_head->frag_ctl =
884 cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
885
886 if (info->control.hw_key) {
887 tx_key = info->control.hw_key;
888 switch (info->control.hw_key->cipher) {
889 case WLAN_CIPHER_SUITE_WEP40:
890 case WLAN_CIPHER_SUITE_WEP104:
891 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
892 break;
893 case WLAN_CIPHER_SUITE_TKIP:
894 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
895 break;
896 case WLAN_CIPHER_SUITE_CCMP:
897 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
898 need_mic = true;
899 default:
900 break;
901 }
902 tx_context->frame_len += tx_key->icv_len;
903 }
904
905 tx_buffer_head->current_rate = cpu_to_le16(current_rate);
906
907 /* legacy rates TODO use ieee80211_tx_rate */
908 if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
909 if (priv->auto_fb_ctrl == AUTO_FB_0) {
910 tx_buffer_head->fifo_ctl |=
911 cpu_to_le16(FIFOCTL_AUTO_FB_0);
912
913 priv->tx_rate_fb0 =
914 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
915 priv->tx_rate_fb1 =
916 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
917
918 fb_option = AUTO_FB_0;
919 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
920 tx_buffer_head->fifo_ctl |=
921 cpu_to_le16(FIFOCTL_AUTO_FB_1);
922
923 priv->tx_rate_fb0 =
924 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
925 priv->tx_rate_fb1 =
926 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
927
928 fb_option = AUTO_FB_1;
929 }
930 }
931
932 tx_context->fb_option = fb_option;
933
934 duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
935 need_mic, need_rts);
936
937 tx_header_size = tx_context->tx_hdr_size;
938 if (!tx_header_size) {
939 tx_context->in_use = false;
940 return -ENOMEM;
941 }
942
943 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
944
945 tx_bytes = tx_header_size + tx_body_size;
946
947 memcpy(tx_context->hdr, skb->data, tx_body_size);
948
949 hdr->duration_id = cpu_to_le16(duration_id);
950
951 if (info->control.hw_key) {
952 tx_key = info->control.hw_key;
953 if (tx_key->keylen > 0)
954 vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
955 tx_key, skb, tx_body_size, mic_hdr);
956 }
957
958 priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
959 IEEE80211_SCTL_SEQ) >> 4;
960
961 tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
962 tx_buffer->pkt_no = tx_context->pkt_no;
963 tx_buffer->type = 0x00;
964
965 tx_bytes += 4;
966
967 tx_context->type = CONTEXT_DATA_PACKET;
968 tx_context->buf_len = tx_bytes;
969
970 spin_lock_irqsave(&priv->lock, flags);
971
972 if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
973 spin_unlock_irqrestore(&priv->lock, flags);
974 return -EIO;
975 }
976
977 spin_unlock_irqrestore(&priv->lock, flags);
978
979 return 0;
980 }
981
vnt_beacon_xmit(struct vnt_private * priv,struct sk_buff * skb)982 static int vnt_beacon_xmit(struct vnt_private *priv,
983 struct sk_buff *skb)
984 {
985 struct vnt_beacon_buffer *beacon_buffer;
986 struct vnt_tx_short_buf_head *short_head;
987 struct ieee80211_tx_info *info;
988 struct vnt_usb_send_context *context;
989 struct ieee80211_mgmt *mgmt_hdr;
990 unsigned long flags;
991 u32 frame_size = skb->len + 4;
992 u16 current_rate, count;
993
994 spin_lock_irqsave(&priv->lock, flags);
995
996 context = vnt_get_free_context(priv);
997 if (!context) {
998 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
999 spin_unlock_irqrestore(&priv->lock, flags);
1000 return -ENOMEM;
1001 }
1002
1003 context->skb = skb;
1004
1005 spin_unlock_irqrestore(&priv->lock, flags);
1006
1007 beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1008 short_head = &beacon_buffer->short_head;
1009
1010 if (priv->bb_type == BB_TYPE_11A) {
1011 current_rate = RATE_6M;
1012
1013 /* Get SignalField,ServiceField,Length */
1014 vnt_get_phy_field(priv, frame_size, current_rate,
1015 PK_TYPE_11A, &short_head->ab);
1016
1017 /* Get Duration and TimeStampOff */
1018 short_head->duration = vnt_get_duration_le(priv,
1019 PK_TYPE_11A, false);
1020 short_head->time_stamp_off =
1021 vnt_time_stamp_off(priv, current_rate);
1022 } else {
1023 current_rate = RATE_1M;
1024 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1025
1026 /* Get SignalField,ServiceField,Length */
1027 vnt_get_phy_field(priv, frame_size, current_rate,
1028 PK_TYPE_11B, &short_head->ab);
1029
1030 /* Get Duration and TimeStampOff */
1031 short_head->duration = vnt_get_duration_le(priv,
1032 PK_TYPE_11B, false);
1033 short_head->time_stamp_off =
1034 vnt_time_stamp_off(priv, current_rate);
1035 }
1036
1037 /* Generate Beacon Header */
1038 mgmt_hdr = &beacon_buffer->mgmt_hdr;
1039 memcpy(mgmt_hdr, skb->data, skb->len);
1040
1041 /* time stamp always 0 */
1042 mgmt_hdr->u.beacon.timestamp = 0;
1043
1044 info = IEEE80211_SKB_CB(skb);
1045 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1046 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1047
1048 hdr->duration_id = 0;
1049 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1050 }
1051
1052 priv->seq_counter++;
1053 if (priv->seq_counter > 0x0fff)
1054 priv->seq_counter = 0;
1055
1056 count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1057
1058 beacon_buffer->tx_byte_count = cpu_to_le16(count);
1059 beacon_buffer->pkt_no = context->pkt_no;
1060 beacon_buffer->type = 0x01;
1061
1062 context->type = CONTEXT_BEACON_PACKET;
1063 context->buf_len = count + 4; /* USB header */
1064
1065 spin_lock_irqsave(&priv->lock, flags);
1066
1067 if (vnt_tx_context(priv, context) != STATUS_PENDING)
1068 ieee80211_free_txskb(priv->hw, context->skb);
1069
1070 spin_unlock_irqrestore(&priv->lock, flags);
1071
1072 return 0;
1073 }
1074
vnt_beacon_make(struct vnt_private * priv,struct ieee80211_vif * vif)1075 int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1076 {
1077 struct sk_buff *beacon;
1078
1079 beacon = ieee80211_beacon_get(priv->hw, vif);
1080 if (!beacon)
1081 return -ENOMEM;
1082
1083 if (vnt_beacon_xmit(priv, beacon)) {
1084 ieee80211_free_txskb(priv->hw, beacon);
1085 return -ENODEV;
1086 }
1087
1088 return 0;
1089 }
1090
vnt_beacon_enable(struct vnt_private * priv,struct ieee80211_vif * vif,struct ieee80211_bss_conf * conf)1091 int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1092 struct ieee80211_bss_conf *conf)
1093 {
1094 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1095
1096 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1097
1098 vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1099
1100 vnt_clear_current_tsf(priv);
1101
1102 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1103
1104 vnt_reset_next_tbtt(priv, conf->beacon_int);
1105
1106 return vnt_beacon_make(priv, vif);
1107 }
1108