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
47 static const u16 vnt_time_stampoff[2][MAX_RATE] = {
48 /* Long Preamble */
49 {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},
50
51 /* Short Preamble */
52 {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},
53 };
54
55 static const u16 vnt_fb_opt0[2][5] = {
56 {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */
57 {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */
58 };
59
60 static const u16 vnt_fb_opt1[2][5] = {
61 {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */
62 {RATE_6M, RATE_6M, RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */
63 };
64
65 #define RTSDUR_BB 0
66 #define RTSDUR_BA 1
67 #define RTSDUR_AA 2
68 #define CTSDUR_BA 3
69 #define RTSDUR_BA_F0 4
70 #define RTSDUR_AA_F0 5
71 #define RTSDUR_BA_F1 6
72 #define RTSDUR_AA_F1 7
73 #define CTSDUR_BA_F0 8
74 #define CTSDUR_BA_F1 9
75 #define DATADUR_B 10
76 #define DATADUR_A 11
77 #define DATADUR_A_F0 12
78 #define DATADUR_A_F1 13
79
80 static struct vnt_usb_send_context
vnt_get_free_context(struct vnt_private * priv)81 *vnt_get_free_context(struct vnt_private *priv)
82 {
83 struct vnt_usb_send_context *context = NULL;
84 int ii;
85
86 dev_dbg(&priv->usb->dev, "%s\n", __func__);
87
88 for (ii = 0; ii < priv->num_tx_context; ii++) {
89 if (!priv->tx_context[ii])
90 return NULL;
91
92 context = priv->tx_context[ii];
93 if (!context->in_use) {
94 context->in_use = true;
95 memset(context->data, 0,
96 MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
97
98 context->hdr = NULL;
99
100 return context;
101 }
102 }
103
104 if (ii == priv->num_tx_context) {
105 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
106
107 ieee80211_stop_queues(priv->hw);
108 }
109
110 return NULL;
111 }
112
vnt_time_stamp_off(struct vnt_private * priv,u16 rate)113 static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
114 {
115 return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
116 [rate % MAX_RATE]);
117 }
118
vnt_get_rsvtime(struct vnt_private * priv,u8 pkt_type,u32 frame_length,u16 rate,int need_ack)119 static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
120 u32 frame_length, u16 rate, int need_ack)
121 {
122 u32 data_time, ack_time;
123
124 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
125 frame_length, rate);
126
127 if (pkt_type == PK_TYPE_11B)
128 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
129 14, (u16)priv->top_cck_basic_rate);
130 else
131 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
132 14, (u16)priv->top_ofdm_basic_rate);
133
134 if (need_ack)
135 return data_time + priv->sifs + ack_time;
136
137 return data_time;
138 }
139
vnt_rxtx_rsvtime_le16(struct vnt_private * priv,u8 pkt_type,u32 frame_length,u16 rate,int need_ack)140 static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
141 u32 frame_length, u16 rate, int need_ack)
142 {
143 return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
144 frame_length, rate, need_ack));
145 }
146
vnt_get_rtscts_rsvtime_le(struct vnt_private * priv,u8 rsv_type,u8 pkt_type,u32 frame_length,u16 current_rate)147 static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv,
148 u8 rsv_type, u8 pkt_type, u32 frame_length, u16 current_rate)
149 {
150 u32 rrv_time, rts_time, cts_time, ack_time, data_time;
151
152 rrv_time = rts_time = cts_time = ack_time = data_time = 0;
153
154 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
155 frame_length, current_rate);
156
157 if (rsv_type == 0) {
158 rts_time = vnt_get_frame_time(priv->preamble_type,
159 pkt_type, 20, priv->top_cck_basic_rate);
160 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
161 pkt_type, 14, priv->top_cck_basic_rate);
162 } else if (rsv_type == 1) {
163 rts_time = vnt_get_frame_time(priv->preamble_type,
164 pkt_type, 20, priv->top_cck_basic_rate);
165 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
166 14, priv->top_cck_basic_rate);
167 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
168 14, priv->top_ofdm_basic_rate);
169 } else if (rsv_type == 2) {
170 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
171 20, priv->top_ofdm_basic_rate);
172 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
173 pkt_type, 14, priv->top_ofdm_basic_rate);
174 } else if (rsv_type == 3) {
175 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
176 14, priv->top_cck_basic_rate);
177 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
178 14, priv->top_ofdm_basic_rate);
179
180 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
181
182 return cpu_to_le16((u16)rrv_time);
183 }
184
185 rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
186
187 return cpu_to_le16((u16)rrv_time);
188 }
189
vnt_get_duration_le(struct vnt_private * priv,u8 pkt_type,int need_ack)190 static __le16 vnt_get_duration_le(struct vnt_private *priv,
191 u8 pkt_type, int need_ack)
192 {
193 u32 ack_time = 0;
194
195 if (need_ack) {
196 if (pkt_type == PK_TYPE_11B)
197 ack_time = vnt_get_frame_time(priv->preamble_type,
198 pkt_type, 14, priv->top_cck_basic_rate);
199 else
200 ack_time = vnt_get_frame_time(priv->preamble_type,
201 pkt_type, 14, priv->top_ofdm_basic_rate);
202
203 return cpu_to_le16((u16)(priv->sifs + ack_time));
204 }
205
206 return 0;
207 }
208
vnt_get_rtscts_duration_le(struct vnt_usb_send_context * context,u8 dur_type,u8 pkt_type,u16 rate)209 static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
210 u8 dur_type, u8 pkt_type, u16 rate)
211 {
212 struct vnt_private *priv = context->priv;
213 u32 cts_time = 0, dur_time = 0;
214 u32 frame_length = context->frame_len;
215 u8 need_ack = context->need_ack;
216
217 switch (dur_type) {
218 case RTSDUR_BB:
219 case RTSDUR_BA:
220 case RTSDUR_BA_F0:
221 case RTSDUR_BA_F1:
222 cts_time = vnt_get_frame_time(priv->preamble_type,
223 pkt_type, 14, priv->top_cck_basic_rate);
224 dur_time = cts_time + 2 * priv->sifs +
225 vnt_get_rsvtime(priv, pkt_type,
226 frame_length, rate, need_ack);
227 break;
228
229 case RTSDUR_AA:
230 case RTSDUR_AA_F0:
231 case RTSDUR_AA_F1:
232 cts_time = vnt_get_frame_time(priv->preamble_type,
233 pkt_type, 14, priv->top_ofdm_basic_rate);
234 dur_time = cts_time + 2 * priv->sifs +
235 vnt_get_rsvtime(priv, pkt_type,
236 frame_length, rate, need_ack);
237 break;
238
239 case CTSDUR_BA:
240 case CTSDUR_BA_F0:
241 case CTSDUR_BA_F1:
242 dur_time = priv->sifs + vnt_get_rsvtime(priv,
243 pkt_type, frame_length, rate, need_ack);
244 break;
245
246 default:
247 break;
248 }
249
250 return cpu_to_le16((u16)dur_time);
251 }
252
vnt_mac_hdr_pos(struct vnt_usb_send_context * tx_context,struct ieee80211_hdr * hdr)253 static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
254 struct ieee80211_hdr *hdr)
255 {
256 u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
257 u8 *hdr_pos = (u8 *)hdr;
258
259 tx_context->hdr = hdr;
260 if (!tx_context->hdr)
261 return 0;
262
263 return (u16)(hdr_pos - head);
264 }
265
vnt_rxtx_datahead_g(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_g * buf)266 static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
267 struct vnt_tx_datahead_g *buf)
268 {
269
270 struct vnt_private *priv = tx_context->priv;
271 struct ieee80211_hdr *hdr =
272 (struct ieee80211_hdr *)tx_context->skb->data;
273 u32 frame_len = tx_context->frame_len;
274 u16 rate = tx_context->tx_rate;
275 u8 need_ack = tx_context->need_ack;
276
277 /* Get SignalField,ServiceField,Length */
278 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
279 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
280 PK_TYPE_11B, &buf->b);
281
282 /* Get Duration and TimeStamp */
283 if (ieee80211_is_pspoll(hdr->frame_control)) {
284 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
285
286 buf->duration_a = dur;
287 buf->duration_b = dur;
288 } else {
289 buf->duration_a = vnt_get_duration_le(priv,
290 tx_context->pkt_type, need_ack);
291 buf->duration_b = vnt_get_duration_le(priv,
292 PK_TYPE_11B, need_ack);
293 }
294
295 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
296 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
297 priv->top_cck_basic_rate);
298
299 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
300
301 return le16_to_cpu(buf->duration_a);
302 }
303
vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_g_fb * buf)304 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
305 struct vnt_tx_datahead_g_fb *buf)
306 {
307 struct vnt_private *priv = tx_context->priv;
308 u32 frame_len = tx_context->frame_len;
309 u16 rate = tx_context->tx_rate;
310 u8 need_ack = tx_context->need_ack;
311
312 /* Get SignalField,ServiceField,Length */
313 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
314
315 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
316 PK_TYPE_11B, &buf->b);
317
318 /* Get Duration and TimeStamp */
319 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
320 need_ack);
321 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
322
323 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
324 need_ack);
325 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
326 need_ack);
327
328 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
329 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
330 priv->top_cck_basic_rate);
331
332 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
333
334 return le16_to_cpu(buf->duration_a);
335 }
336
vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_a_fb * buf)337 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
338 struct vnt_tx_datahead_a_fb *buf)
339 {
340 struct vnt_private *priv = tx_context->priv;
341 u16 rate = tx_context->tx_rate;
342 u8 pkt_type = tx_context->pkt_type;
343 u8 need_ack = tx_context->need_ack;
344 u32 frame_len = tx_context->frame_len;
345
346 /* Get SignalField,ServiceField,Length */
347 vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
348 /* Get Duration and TimeStampOff */
349 buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
350
351 buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
352 buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
353
354 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
355
356 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
357
358 return le16_to_cpu(buf->duration);
359 }
360
vnt_rxtx_datahead_ab(struct vnt_usb_send_context * tx_context,struct vnt_tx_datahead_ab * buf)361 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
362 struct vnt_tx_datahead_ab *buf)
363 {
364 struct vnt_private *priv = tx_context->priv;
365 struct ieee80211_hdr *hdr =
366 (struct ieee80211_hdr *)tx_context->skb->data;
367 u32 frame_len = tx_context->frame_len;
368 u16 rate = tx_context->tx_rate;
369 u8 need_ack = tx_context->need_ack;
370
371 /* Get SignalField,ServiceField,Length */
372 vnt_get_phy_field(priv, frame_len, rate,
373 tx_context->pkt_type, &buf->ab);
374
375 /* Get Duration and TimeStampOff */
376 if (ieee80211_is_pspoll(hdr->frame_control)) {
377 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
378
379 buf->duration = dur;
380 } else {
381 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
382 need_ack);
383 }
384
385 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
386
387 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
388
389 return le16_to_cpu(buf->duration);
390 }
391
vnt_fill_ieee80211_rts(struct vnt_usb_send_context * tx_context,struct ieee80211_rts * rts,__le16 duration)392 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
393 struct ieee80211_rts *rts, __le16 duration)
394 {
395 struct ieee80211_hdr *hdr =
396 (struct ieee80211_hdr *)tx_context->skb->data;
397
398 rts->duration = duration;
399 rts->frame_control =
400 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
401
402 ether_addr_copy(rts->ra, hdr->addr1);
403 ether_addr_copy(rts->ta, hdr->addr2);
404
405 return 0;
406 }
407
vnt_rxtx_rts_g_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_g * buf)408 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
409 struct vnt_rts_g *buf)
410 {
411 struct vnt_private *priv = tx_context->priv;
412 u16 rts_frame_len = 20;
413 u16 current_rate = tx_context->tx_rate;
414
415 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
416 PK_TYPE_11B, &buf->b);
417 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
418 tx_context->pkt_type, &buf->a);
419
420 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
421 PK_TYPE_11B,
422 priv->top_cck_basic_rate);
423 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
424 tx_context->pkt_type,
425 current_rate);
426 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
427 tx_context->pkt_type,
428 current_rate);
429
430 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
431
432 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
433 }
434
vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_g_fb * buf)435 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
436 struct vnt_rts_g_fb *buf)
437 {
438 struct vnt_private *priv = tx_context->priv;
439 u16 current_rate = tx_context->tx_rate;
440 u16 rts_frame_len = 20;
441
442 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
443 PK_TYPE_11B, &buf->b);
444 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
445 tx_context->pkt_type, &buf->a);
446
447 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
448 PK_TYPE_11B,
449 priv->top_cck_basic_rate);
450 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
451 tx_context->pkt_type,
452 current_rate);
453 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
454 tx_context->pkt_type,
455 current_rate);
456
457 buf->rts_duration_ba_f0 =
458 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
459 tx_context->pkt_type,
460 priv->tx_rate_fb0);
461 buf->rts_duration_aa_f0 =
462 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
463 tx_context->pkt_type,
464 priv->tx_rate_fb0);
465 buf->rts_duration_ba_f1 =
466 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
467 tx_context->pkt_type,
468 priv->tx_rate_fb1);
469 buf->rts_duration_aa_f1 =
470 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
471 tx_context->pkt_type,
472 priv->tx_rate_fb1);
473
474 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
475
476 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
477 }
478
vnt_rxtx_rts_ab_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_ab * buf)479 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
480 struct vnt_rts_ab *buf)
481 {
482 struct vnt_private *priv = tx_context->priv;
483 u16 current_rate = tx_context->tx_rate;
484 u16 rts_frame_len = 20;
485
486 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
487 tx_context->pkt_type, &buf->ab);
488
489 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
490 tx_context->pkt_type,
491 current_rate);
492
493 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
494
495 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
496 }
497
vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context * tx_context,struct vnt_rts_a_fb * buf)498 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
499 struct vnt_rts_a_fb *buf)
500 {
501 struct vnt_private *priv = tx_context->priv;
502 u16 current_rate = tx_context->tx_rate;
503 u16 rts_frame_len = 20;
504
505 vnt_get_phy_field(priv, rts_frame_len,
506 priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a);
507
508 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
509 tx_context->pkt_type,
510 current_rate);
511
512 buf->rts_duration_f0 =
513 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
514 tx_context->pkt_type,
515 priv->tx_rate_fb0);
516
517 buf->rts_duration_f1 =
518 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
519 tx_context->pkt_type,
520 priv->tx_rate_fb1);
521
522 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
523
524 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
525 }
526
vnt_fill_cts_fb_head(struct vnt_usb_send_context * tx_context,union vnt_tx_data_head * head)527 static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
528 union vnt_tx_data_head *head)
529 {
530 struct vnt_private *priv = tx_context->priv;
531 struct vnt_cts_fb *buf = &head->cts_g_fb;
532 u32 cts_frame_len = 14;
533 u16 current_rate = tx_context->tx_rate;
534
535 /* Get SignalField,ServiceField,Length */
536 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
537 PK_TYPE_11B, &buf->b);
538
539 buf->duration_ba =
540 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
541 tx_context->pkt_type,
542 current_rate);
543 /* Get CTSDuration_ba_f0 */
544 buf->cts_duration_ba_f0 =
545 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
546 tx_context->pkt_type,
547 priv->tx_rate_fb0);
548 /* Get CTSDuration_ba_f1 */
549 buf->cts_duration_ba_f1 =
550 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
551 tx_context->pkt_type,
552 priv->tx_rate_fb1);
553 /* Get CTS Frame body */
554 buf->data.duration = buf->duration_ba;
555 buf->data.frame_control =
556 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
557
558 ether_addr_copy(buf->data.ra, priv->current_net_addr);
559
560 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
561 }
562
vnt_fill_cts_head(struct vnt_usb_send_context * tx_context,union vnt_tx_data_head * head)563 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
564 union vnt_tx_data_head *head)
565 {
566 struct vnt_private *priv = tx_context->priv;
567 struct vnt_cts *buf = &head->cts_g;
568 u32 cts_frame_len = 14;
569 u16 current_rate = tx_context->tx_rate;
570
571 /* Get SignalField,ServiceField,Length */
572 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
573 PK_TYPE_11B, &buf->b);
574 /* Get CTSDuration_ba */
575 buf->duration_ba =
576 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
577 tx_context->pkt_type,
578 current_rate);
579 /*Get CTS Frame body*/
580 buf->data.duration = buf->duration_ba;
581 buf->data.frame_control =
582 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
583
584 ether_addr_copy(buf->data.ra, priv->current_net_addr);
585
586 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
587 }
588
vnt_rxtx_rts(struct vnt_usb_send_context * tx_context,union vnt_tx_head * tx_head,bool need_mic)589 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
590 union vnt_tx_head *tx_head, bool need_mic)
591 {
592 struct vnt_private *priv = tx_context->priv;
593 struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
594 union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
595 u32 frame_len = tx_context->frame_len;
596 u16 current_rate = tx_context->tx_rate;
597 u8 need_ack = tx_context->need_ack;
598
599 buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
600 tx_context->pkt_type, frame_len, current_rate);
601 buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
602 tx_context->pkt_type, frame_len, current_rate);
603 buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
604 tx_context->pkt_type, frame_len, current_rate);
605
606 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
607 frame_len, current_rate,
608 need_ack);
609 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
610 priv->top_cck_basic_rate, need_ack);
611
612 if (need_mic)
613 head = &tx_head->tx_rts.tx.mic.head;
614
615 if (tx_context->fb_option)
616 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
617
618 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
619 }
620
vnt_rxtx_cts(struct vnt_usb_send_context * tx_context,union vnt_tx_head * tx_head,bool need_mic)621 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
622 union vnt_tx_head *tx_head, bool need_mic)
623 {
624 struct vnt_private *priv = tx_context->priv;
625 struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
626 union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
627 u32 frame_len = tx_context->frame_len;
628 u16 current_rate = tx_context->tx_rate;
629 u8 need_ack = tx_context->need_ack;
630
631 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
632 frame_len, current_rate, need_ack);
633 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
634 frame_len, priv->top_cck_basic_rate, need_ack);
635
636 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
637 tx_context->pkt_type, frame_len, current_rate);
638
639 if (need_mic)
640 head = &tx_head->tx_cts.tx.mic.head;
641
642 /* Fill CTS */
643 if (tx_context->fb_option)
644 return vnt_fill_cts_fb_head(tx_context, head);
645
646 return vnt_fill_cts_head(tx_context, head);
647 }
648
vnt_rxtx_ab(struct vnt_usb_send_context * tx_context,union vnt_tx_head * tx_head,bool need_rts,bool need_mic)649 static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
650 union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
651 {
652 struct vnt_private *priv = tx_context->priv;
653 struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
654 union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
655 u32 frame_len = tx_context->frame_len;
656 u16 current_rate = tx_context->tx_rate;
657 u8 need_ack = tx_context->need_ack;
658
659 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
660 frame_len, current_rate, need_ack);
661
662 if (need_mic)
663 head = &tx_head->tx_ab.tx.mic.head;
664
665 if (need_rts) {
666 if (tx_context->pkt_type == PK_TYPE_11B)
667 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
668 tx_context->pkt_type, frame_len, current_rate);
669 else /* PK_TYPE_11A */
670 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
671 tx_context->pkt_type, frame_len, current_rate);
672
673 if (tx_context->fb_option &&
674 tx_context->pkt_type == PK_TYPE_11A)
675 return vnt_rxtx_rts_a_fb_head(tx_context,
676 &head->rts_a_fb);
677
678 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
679 }
680
681 if (tx_context->pkt_type == PK_TYPE_11A)
682 return vnt_rxtx_datahead_a_fb(tx_context,
683 &head->data_head_a_fb);
684
685 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
686 }
687
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)688 static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
689 struct vnt_tx_buffer *tx_buffer,
690 struct vnt_mic_hdr **mic_hdr, u32 need_mic,
691 bool need_rts)
692 {
693
694 if (tx_context->pkt_type == PK_TYPE_11GB ||
695 tx_context->pkt_type == PK_TYPE_11GA) {
696 if (need_rts) {
697 if (need_mic)
698 *mic_hdr = &tx_buffer->
699 tx_head.tx_rts.tx.mic.hdr;
700
701 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
702 need_mic);
703 }
704
705 if (need_mic)
706 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
707
708 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
709 }
710
711 if (need_mic)
712 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
713
714 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
715 }
716
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)717 static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
718 u8 *key_buffer, struct ieee80211_key_conf *tx_key, struct sk_buff *skb,
719 u16 payload_len, struct vnt_mic_hdr *mic_hdr)
720 {
721 struct ieee80211_hdr *hdr = tx_context->hdr;
722 struct ieee80211_key_seq seq;
723 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
724
725 /* strip header and icv len from payload */
726 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
727 payload_len -= tx_key->icv_len;
728
729 switch (tx_key->cipher) {
730 case WLAN_CIPHER_SUITE_WEP40:
731 case WLAN_CIPHER_SUITE_WEP104:
732 memcpy(key_buffer, iv, 3);
733 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
734
735 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
736 memcpy(key_buffer + 8, iv, 3);
737 memcpy(key_buffer + 11,
738 tx_key->key, WLAN_KEY_LEN_WEP40);
739 }
740
741 break;
742 case WLAN_CIPHER_SUITE_TKIP:
743 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
744
745 break;
746 case WLAN_CIPHER_SUITE_CCMP:
747
748 if (!mic_hdr)
749 return;
750
751 mic_hdr->id = 0x59;
752 mic_hdr->payload_len = cpu_to_be16(payload_len);
753 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
754
755 ieee80211_get_key_tx_seq(tx_key, &seq);
756
757 memcpy(mic_hdr->ccmp_pn, seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
758
759 if (ieee80211_has_a4(hdr->frame_control))
760 mic_hdr->hlen = cpu_to_be16(28);
761 else
762 mic_hdr->hlen = cpu_to_be16(22);
763
764 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
765 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
766 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
767
768 mic_hdr->frame_control = cpu_to_le16(
769 le16_to_cpu(hdr->frame_control) & 0xc78f);
770 mic_hdr->seq_ctrl = cpu_to_le16(
771 le16_to_cpu(hdr->seq_ctrl) & 0xf);
772
773 if (ieee80211_has_a4(hdr->frame_control))
774 ether_addr_copy(mic_hdr->addr4, hdr->addr4);
775
776
777 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
778
779 break;
780 default:
781 break;
782 }
783
784 }
785
vnt_tx_packet(struct vnt_private * priv,struct sk_buff * skb)786 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
787 {
788 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
789 struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
790 struct ieee80211_rate *rate;
791 struct ieee80211_key_conf *tx_key;
792 struct ieee80211_hdr *hdr;
793 struct vnt_mic_hdr *mic_hdr = NULL;
794 struct vnt_tx_buffer *tx_buffer;
795 struct vnt_tx_fifo_head *tx_buffer_head;
796 struct vnt_usb_send_context *tx_context;
797 unsigned long flags;
798 u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
799 u8 pkt_type, fb_option = AUTO_FB_NONE;
800 bool need_rts = false, is_pspoll = false;
801 bool need_mic = false;
802
803 hdr = (struct ieee80211_hdr *)(skb->data);
804
805 rate = ieee80211_get_tx_rate(priv->hw, info);
806
807 current_rate = rate->hw_value;
808 if (priv->current_rate != current_rate &&
809 !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
810 priv->current_rate = current_rate;
811 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
812 }
813
814 if (current_rate > RATE_11M) {
815 if (info->band == IEEE80211_BAND_5GHZ) {
816 pkt_type = PK_TYPE_11A;
817 } else {
818 if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
819 pkt_type = PK_TYPE_11GB;
820 else
821 pkt_type = PK_TYPE_11GA;
822 }
823 } else {
824 pkt_type = PK_TYPE_11B;
825 }
826
827 spin_lock_irqsave(&priv->lock, flags);
828
829 tx_context = vnt_get_free_context(priv);
830 if (!tx_context) {
831 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
832 spin_unlock_irqrestore(&priv->lock, flags);
833 return -ENOMEM;
834 }
835
836 tx_context->skb = skb;
837 tx_context->pkt_type = pkt_type;
838 tx_context->need_ack = false;
839 tx_context->frame_len = skb->len + 4;
840 tx_context->tx_rate = current_rate;
841
842 spin_unlock_irqrestore(&priv->lock, flags);
843
844 tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
845 tx_buffer_head = &tx_buffer->fifo_head;
846 tx_body_size = skb->len;
847
848 /*Set fifo controls */
849 if (pkt_type == PK_TYPE_11A)
850 tx_buffer_head->fifo_ctl = 0;
851 else if (pkt_type == PK_TYPE_11B)
852 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
853 else if (pkt_type == PK_TYPE_11GB)
854 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
855 else if (pkt_type == PK_TYPE_11GA)
856 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
857
858 if (!ieee80211_is_data(hdr->frame_control)) {
859 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
860 FIFOCTL_ISDMA0);
861 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
862
863 tx_buffer_head->time_stamp =
864 cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
865 } else {
866 tx_buffer_head->time_stamp =
867 cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
868 }
869
870 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
871 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
872 tx_context->need_ack = true;
873 }
874
875 if (ieee80211_has_retry(hdr->frame_control))
876 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
877
878 if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
879 priv->preamble_type = PREAMBLE_SHORT;
880 else
881 priv->preamble_type = PREAMBLE_LONG;
882
883 if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
884 need_rts = true;
885 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
886 }
887
888 if (ieee80211_has_a4(hdr->frame_control))
889 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
890
891 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
892 is_pspoll = true;
893
894 tx_buffer_head->frag_ctl =
895 cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
896
897 if (info->control.hw_key) {
898 tx_key = info->control.hw_key;
899 switch (info->control.hw_key->cipher) {
900 case WLAN_CIPHER_SUITE_WEP40:
901 case WLAN_CIPHER_SUITE_WEP104:
902 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
903 break;
904 case WLAN_CIPHER_SUITE_TKIP:
905 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
906 break;
907 case WLAN_CIPHER_SUITE_CCMP:
908 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
909 need_mic = true;
910 default:
911 break;
912 }
913 tx_context->frame_len += tx_key->icv_len;
914 }
915
916 tx_buffer_head->current_rate = cpu_to_le16(current_rate);
917
918 /* legacy rates TODO use ieee80211_tx_rate */
919 if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
920 if (priv->auto_fb_ctrl == AUTO_FB_0) {
921 tx_buffer_head->fifo_ctl |=
922 cpu_to_le16(FIFOCTL_AUTO_FB_0);
923
924 priv->tx_rate_fb0 =
925 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
926 priv->tx_rate_fb1 =
927 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
928
929 fb_option = AUTO_FB_0;
930 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
931 tx_buffer_head->fifo_ctl |=
932 cpu_to_le16(FIFOCTL_AUTO_FB_1);
933
934 priv->tx_rate_fb0 =
935 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
936 priv->tx_rate_fb1 =
937 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
938
939 fb_option = AUTO_FB_1;
940 }
941 }
942
943 tx_context->fb_option = fb_option;
944
945 duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
946 need_mic, need_rts);
947
948 tx_header_size = tx_context->tx_hdr_size;
949 if (!tx_header_size) {
950 tx_context->in_use = false;
951 return -ENOMEM;
952 }
953
954 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
955
956 tx_bytes = tx_header_size + tx_body_size;
957
958 memcpy(tx_context->hdr, skb->data, tx_body_size);
959
960 hdr->duration_id = cpu_to_le16(duration_id);
961
962 if (info->control.hw_key) {
963 tx_key = info->control.hw_key;
964 if (tx_key->keylen > 0)
965 vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
966 tx_key, skb, tx_body_size, mic_hdr);
967 }
968
969 priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
970 IEEE80211_SCTL_SEQ) >> 4;
971
972 tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
973 tx_buffer->pkt_no = tx_context->pkt_no;
974 tx_buffer->type = 0x00;
975
976 tx_bytes += 4;
977
978 tx_context->type = CONTEXT_DATA_PACKET;
979 tx_context->buf_len = tx_bytes;
980
981 spin_lock_irqsave(&priv->lock, flags);
982
983 if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
984 spin_unlock_irqrestore(&priv->lock, flags);
985 return -EIO;
986 }
987
988 spin_unlock_irqrestore(&priv->lock, flags);
989
990 return 0;
991 }
992
vnt_beacon_xmit(struct vnt_private * priv,struct sk_buff * skb)993 static int vnt_beacon_xmit(struct vnt_private *priv,
994 struct sk_buff *skb)
995 {
996 struct vnt_beacon_buffer *beacon_buffer;
997 struct vnt_tx_short_buf_head *short_head;
998 struct ieee80211_tx_info *info;
999 struct vnt_usb_send_context *context;
1000 struct ieee80211_mgmt *mgmt_hdr;
1001 unsigned long flags;
1002 u32 frame_size = skb->len + 4;
1003 u16 current_rate, count;
1004
1005 spin_lock_irqsave(&priv->lock, flags);
1006
1007 context = vnt_get_free_context(priv);
1008 if (!context) {
1009 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
1010 spin_unlock_irqrestore(&priv->lock, flags);
1011 return -ENOMEM;
1012 }
1013
1014 context->skb = skb;
1015
1016 spin_unlock_irqrestore(&priv->lock, flags);
1017
1018 beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1019 short_head = &beacon_buffer->short_head;
1020
1021 if (priv->bb_type == BB_TYPE_11A) {
1022 current_rate = RATE_6M;
1023
1024 /* Get SignalField,ServiceField,Length */
1025 vnt_get_phy_field(priv, frame_size, current_rate,
1026 PK_TYPE_11A, &short_head->ab);
1027
1028 /* Get Duration and TimeStampOff */
1029 short_head->duration = vnt_get_duration_le(priv,
1030 PK_TYPE_11A, false);
1031 short_head->time_stamp_off =
1032 vnt_time_stamp_off(priv, current_rate);
1033 } else {
1034 current_rate = RATE_1M;
1035 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1036
1037 /* Get SignalField,ServiceField,Length */
1038 vnt_get_phy_field(priv, frame_size, current_rate,
1039 PK_TYPE_11B, &short_head->ab);
1040
1041 /* Get Duration and TimeStampOff */
1042 short_head->duration = vnt_get_duration_le(priv,
1043 PK_TYPE_11B, false);
1044 short_head->time_stamp_off =
1045 vnt_time_stamp_off(priv, current_rate);
1046 }
1047
1048 /* Generate Beacon Header */
1049 mgmt_hdr = &beacon_buffer->mgmt_hdr;
1050 memcpy(mgmt_hdr, skb->data, skb->len);
1051
1052 /* time stamp always 0 */
1053 mgmt_hdr->u.beacon.timestamp = 0;
1054
1055 info = IEEE80211_SKB_CB(skb);
1056 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1057 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1058
1059 hdr->duration_id = 0;
1060 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1061 }
1062
1063 priv->seq_counter++;
1064 if (priv->seq_counter > 0x0fff)
1065 priv->seq_counter = 0;
1066
1067 count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1068
1069 beacon_buffer->tx_byte_count = cpu_to_le16(count);
1070 beacon_buffer->pkt_no = context->pkt_no;
1071 beacon_buffer->type = 0x01;
1072
1073 context->type = CONTEXT_BEACON_PACKET;
1074 context->buf_len = count + 4; /* USB header */
1075
1076 spin_lock_irqsave(&priv->lock, flags);
1077
1078 if (vnt_tx_context(priv, context) != STATUS_PENDING)
1079 ieee80211_free_txskb(priv->hw, context->skb);
1080
1081 spin_unlock_irqrestore(&priv->lock, flags);
1082
1083 return 0;
1084 }
1085
vnt_beacon_make(struct vnt_private * priv,struct ieee80211_vif * vif)1086 int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1087 {
1088 struct sk_buff *beacon;
1089
1090 beacon = ieee80211_beacon_get(priv->hw, vif);
1091 if (!beacon)
1092 return -ENOMEM;
1093
1094 if (vnt_beacon_xmit(priv, beacon)) {
1095 ieee80211_free_txskb(priv->hw, beacon);
1096 return -ENODEV;
1097 }
1098
1099 return 0;
1100 }
1101
vnt_beacon_enable(struct vnt_private * priv,struct ieee80211_vif * vif,struct ieee80211_bss_conf * conf)1102 int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1103 struct ieee80211_bss_conf *conf)
1104 {
1105 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1106
1107 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1108
1109 vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1110
1111 vnt_clear_current_tsf(priv);
1112
1113 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1114
1115 vnt_reset_next_tbtt(priv, conf->beacon_int);
1116
1117 return vnt_beacon_make(priv, vif);
1118 }
1119