]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/staging/vt6656/rxtx.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'v4.7-rc1' into patchwork
[mirror_ubuntu-artful-kernel.git] / drivers / staging / vt6656 / rxtx.c
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
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
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
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
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
144 static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv,
145 u8 rsv_type, u8 pkt_type, u32 frame_length, u16 current_rate)
146 {
147 u32 rrv_time, rts_time, cts_time, ack_time, data_time;
148
149 rrv_time = rts_time = cts_time = ack_time = data_time = 0;
150
151 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
152 frame_length, current_rate);
153
154 if (rsv_type == 0) {
155 rts_time = vnt_get_frame_time(priv->preamble_type,
156 pkt_type, 20, priv->top_cck_basic_rate);
157 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
158 pkt_type, 14, priv->top_cck_basic_rate);
159 } else if (rsv_type == 1) {
160 rts_time = vnt_get_frame_time(priv->preamble_type,
161 pkt_type, 20, priv->top_cck_basic_rate);
162 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
163 14, priv->top_cck_basic_rate);
164 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
165 14, priv->top_ofdm_basic_rate);
166 } else if (rsv_type == 2) {
167 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
168 20, priv->top_ofdm_basic_rate);
169 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
170 pkt_type, 14, priv->top_ofdm_basic_rate);
171 } else if (rsv_type == 3) {
172 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
173 14, priv->top_cck_basic_rate);
174 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
175 14, priv->top_ofdm_basic_rate);
176
177 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
178
179 return cpu_to_le16((u16)rrv_time);
180 }
181
182 rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
183
184 return cpu_to_le16((u16)rrv_time);
185 }
186
187 static __le16 vnt_get_duration_le(struct vnt_private *priv,
188 u8 pkt_type, int need_ack)
189 {
190 u32 ack_time = 0;
191
192 if (need_ack) {
193 if (pkt_type == PK_TYPE_11B)
194 ack_time = vnt_get_frame_time(priv->preamble_type,
195 pkt_type, 14, priv->top_cck_basic_rate);
196 else
197 ack_time = vnt_get_frame_time(priv->preamble_type,
198 pkt_type, 14, priv->top_ofdm_basic_rate);
199
200 return cpu_to_le16((u16)(priv->sifs + ack_time));
201 }
202
203 return 0;
204 }
205
206 static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
207 u8 dur_type, u8 pkt_type, u16 rate)
208 {
209 struct vnt_private *priv = context->priv;
210 u32 cts_time = 0, dur_time = 0;
211 u32 frame_length = context->frame_len;
212 u8 need_ack = context->need_ack;
213
214 switch (dur_type) {
215 case RTSDUR_BB:
216 case RTSDUR_BA:
217 case RTSDUR_BA_F0:
218 case RTSDUR_BA_F1:
219 cts_time = vnt_get_frame_time(priv->preamble_type,
220 pkt_type, 14, priv->top_cck_basic_rate);
221 dur_time = cts_time + 2 * priv->sifs +
222 vnt_get_rsvtime(priv, pkt_type,
223 frame_length, rate, need_ack);
224 break;
225
226 case RTSDUR_AA:
227 case RTSDUR_AA_F0:
228 case RTSDUR_AA_F1:
229 cts_time = vnt_get_frame_time(priv->preamble_type,
230 pkt_type, 14, priv->top_ofdm_basic_rate);
231 dur_time = cts_time + 2 * priv->sifs +
232 vnt_get_rsvtime(priv, pkt_type,
233 frame_length, rate, need_ack);
234 break;
235
236 case CTSDUR_BA:
237 case CTSDUR_BA_F0:
238 case CTSDUR_BA_F1:
239 dur_time = priv->sifs + vnt_get_rsvtime(priv,
240 pkt_type, frame_length, rate, need_ack);
241 break;
242
243 default:
244 break;
245 }
246
247 return cpu_to_le16((u16)dur_time);
248 }
249
250 static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
251 struct ieee80211_hdr *hdr)
252 {
253 u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
254 u8 *hdr_pos = (u8 *)hdr;
255
256 tx_context->hdr = hdr;
257 if (!tx_context->hdr)
258 return 0;
259
260 return (u16)(hdr_pos - head);
261 }
262
263 static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
264 struct vnt_tx_datahead_g *buf)
265 {
266
267 struct vnt_private *priv = tx_context->priv;
268 struct ieee80211_hdr *hdr =
269 (struct ieee80211_hdr *)tx_context->skb->data;
270 u32 frame_len = tx_context->frame_len;
271 u16 rate = tx_context->tx_rate;
272 u8 need_ack = tx_context->need_ack;
273
274 /* Get SignalField,ServiceField,Length */
275 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
276 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
277 PK_TYPE_11B, &buf->b);
278
279 /* Get Duration and TimeStamp */
280 if (ieee80211_is_pspoll(hdr->frame_control)) {
281 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
282
283 buf->duration_a = dur;
284 buf->duration_b = dur;
285 } else {
286 buf->duration_a = vnt_get_duration_le(priv,
287 tx_context->pkt_type, need_ack);
288 buf->duration_b = vnt_get_duration_le(priv,
289 PK_TYPE_11B, need_ack);
290 }
291
292 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
293 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
294 priv->top_cck_basic_rate);
295
296 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
297
298 return le16_to_cpu(buf->duration_a);
299 }
300
301 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
302 struct vnt_tx_datahead_g_fb *buf)
303 {
304 struct vnt_private *priv = tx_context->priv;
305 u32 frame_len = tx_context->frame_len;
306 u16 rate = tx_context->tx_rate;
307 u8 need_ack = tx_context->need_ack;
308
309 /* Get SignalField,ServiceField,Length */
310 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
311
312 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
313 PK_TYPE_11B, &buf->b);
314
315 /* Get Duration and TimeStamp */
316 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
317 need_ack);
318 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
319
320 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
321 need_ack);
322 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
323 need_ack);
324
325 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
326 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
327 priv->top_cck_basic_rate);
328
329 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
330
331 return le16_to_cpu(buf->duration_a);
332 }
333
334 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
335 struct vnt_tx_datahead_a_fb *buf)
336 {
337 struct vnt_private *priv = tx_context->priv;
338 u16 rate = tx_context->tx_rate;
339 u8 pkt_type = tx_context->pkt_type;
340 u8 need_ack = tx_context->need_ack;
341 u32 frame_len = tx_context->frame_len;
342
343 /* Get SignalField,ServiceField,Length */
344 vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
345 /* Get Duration and TimeStampOff */
346 buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
347
348 buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
349 buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
350
351 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
352
353 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
354
355 return le16_to_cpu(buf->duration);
356 }
357
358 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
359 struct vnt_tx_datahead_ab *buf)
360 {
361 struct vnt_private *priv = tx_context->priv;
362 struct ieee80211_hdr *hdr =
363 (struct ieee80211_hdr *)tx_context->skb->data;
364 u32 frame_len = tx_context->frame_len;
365 u16 rate = tx_context->tx_rate;
366 u8 need_ack = tx_context->need_ack;
367
368 /* Get SignalField,ServiceField,Length */
369 vnt_get_phy_field(priv, frame_len, rate,
370 tx_context->pkt_type, &buf->ab);
371
372 /* Get Duration and TimeStampOff */
373 if (ieee80211_is_pspoll(hdr->frame_control)) {
374 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
375
376 buf->duration = dur;
377 } else {
378 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
379 need_ack);
380 }
381
382 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
383
384 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
385
386 return le16_to_cpu(buf->duration);
387 }
388
389 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
390 struct ieee80211_rts *rts, __le16 duration)
391 {
392 struct ieee80211_hdr *hdr =
393 (struct ieee80211_hdr *)tx_context->skb->data;
394
395 rts->duration = duration;
396 rts->frame_control =
397 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
398
399 ether_addr_copy(rts->ra, hdr->addr1);
400 ether_addr_copy(rts->ta, hdr->addr2);
401
402 return 0;
403 }
404
405 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
406 struct vnt_rts_g *buf)
407 {
408 struct vnt_private *priv = tx_context->priv;
409 u16 rts_frame_len = 20;
410 u16 current_rate = tx_context->tx_rate;
411
412 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
413 PK_TYPE_11B, &buf->b);
414 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
415 tx_context->pkt_type, &buf->a);
416
417 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
418 PK_TYPE_11B,
419 priv->top_cck_basic_rate);
420 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
421 tx_context->pkt_type,
422 current_rate);
423 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
424 tx_context->pkt_type,
425 current_rate);
426
427 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
428
429 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
430 }
431
432 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
433 struct vnt_rts_g_fb *buf)
434 {
435 struct vnt_private *priv = tx_context->priv;
436 u16 current_rate = tx_context->tx_rate;
437 u16 rts_frame_len = 20;
438
439 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
440 PK_TYPE_11B, &buf->b);
441 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
442 tx_context->pkt_type, &buf->a);
443
444 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
445 PK_TYPE_11B,
446 priv->top_cck_basic_rate);
447 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
448 tx_context->pkt_type,
449 current_rate);
450 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
451 tx_context->pkt_type,
452 current_rate);
453
454 buf->rts_duration_ba_f0 =
455 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
456 tx_context->pkt_type,
457 priv->tx_rate_fb0);
458 buf->rts_duration_aa_f0 =
459 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
460 tx_context->pkt_type,
461 priv->tx_rate_fb0);
462 buf->rts_duration_ba_f1 =
463 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
464 tx_context->pkt_type,
465 priv->tx_rate_fb1);
466 buf->rts_duration_aa_f1 =
467 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
468 tx_context->pkt_type,
469 priv->tx_rate_fb1);
470
471 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
472
473 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
474 }
475
476 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
477 struct vnt_rts_ab *buf)
478 {
479 struct vnt_private *priv = tx_context->priv;
480 u16 current_rate = tx_context->tx_rate;
481 u16 rts_frame_len = 20;
482
483 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
484 tx_context->pkt_type, &buf->ab);
485
486 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
487 tx_context->pkt_type,
488 current_rate);
489
490 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
491
492 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
493 }
494
495 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
496 struct vnt_rts_a_fb *buf)
497 {
498 struct vnt_private *priv = tx_context->priv;
499 u16 current_rate = tx_context->tx_rate;
500 u16 rts_frame_len = 20;
501
502 vnt_get_phy_field(priv, rts_frame_len,
503 priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a);
504
505 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
506 tx_context->pkt_type,
507 current_rate);
508
509 buf->rts_duration_f0 =
510 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
511 tx_context->pkt_type,
512 priv->tx_rate_fb0);
513
514 buf->rts_duration_f1 =
515 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
516 tx_context->pkt_type,
517 priv->tx_rate_fb1);
518
519 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
520
521 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
522 }
523
524 static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
525 union vnt_tx_data_head *head)
526 {
527 struct vnt_private *priv = tx_context->priv;
528 struct vnt_cts_fb *buf = &head->cts_g_fb;
529 u32 cts_frame_len = 14;
530 u16 current_rate = tx_context->tx_rate;
531
532 /* Get SignalField,ServiceField,Length */
533 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
534 PK_TYPE_11B, &buf->b);
535
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 ether_addr_copy(buf->data.ra, priv->current_net_addr);
556
557 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
558 }
559
560 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
561 union vnt_tx_data_head *head)
562 {
563 struct vnt_private *priv = tx_context->priv;
564 struct vnt_cts *buf = &head->cts_g;
565 u32 cts_frame_len = 14;
566 u16 current_rate = tx_context->tx_rate;
567
568 /* Get SignalField,ServiceField,Length */
569 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
570 PK_TYPE_11B, &buf->b);
571 /* Get CTSDuration_ba */
572 buf->duration_ba =
573 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
574 tx_context->pkt_type,
575 current_rate);
576 /*Get CTS Frame body*/
577 buf->data.duration = buf->duration_ba;
578 buf->data.frame_control =
579 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
580
581 ether_addr_copy(buf->data.ra, priv->current_net_addr);
582
583 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
584 }
585
586 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
587 union vnt_tx_head *tx_head, bool need_mic)
588 {
589 struct vnt_private *priv = tx_context->priv;
590 struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
591 union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
592 u32 frame_len = tx_context->frame_len;
593 u16 current_rate = tx_context->tx_rate;
594 u8 need_ack = tx_context->need_ack;
595
596 buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
597 tx_context->pkt_type, frame_len, current_rate);
598 buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
599 tx_context->pkt_type, frame_len, current_rate);
600 buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
601 tx_context->pkt_type, frame_len, current_rate);
602
603 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
604 frame_len, current_rate,
605 need_ack);
606 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
607 priv->top_cck_basic_rate, need_ack);
608
609 if (need_mic)
610 head = &tx_head->tx_rts.tx.mic.head;
611
612 if (tx_context->fb_option)
613 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
614
615 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
616 }
617
618 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
619 union vnt_tx_head *tx_head, bool need_mic)
620 {
621 struct vnt_private *priv = tx_context->priv;
622 struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
623 union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
624 u32 frame_len = tx_context->frame_len;
625 u16 current_rate = tx_context->tx_rate;
626 u8 need_ack = tx_context->need_ack;
627
628 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
629 frame_len, current_rate, need_ack);
630 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
631 frame_len, priv->top_cck_basic_rate, need_ack);
632
633 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
634 tx_context->pkt_type, frame_len, current_rate);
635
636 if (need_mic)
637 head = &tx_head->tx_cts.tx.mic.head;
638
639 /* Fill CTS */
640 if (tx_context->fb_option)
641 return vnt_fill_cts_fb_head(tx_context, head);
642
643 return vnt_fill_cts_head(tx_context, head);
644 }
645
646 static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
647 union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
648 {
649 struct vnt_private *priv = tx_context->priv;
650 struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
651 union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
652 u32 frame_len = tx_context->frame_len;
653 u16 current_rate = tx_context->tx_rate;
654 u8 need_ack = tx_context->need_ack;
655
656 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
657 frame_len, current_rate, need_ack);
658
659 if (need_mic)
660 head = &tx_head->tx_ab.tx.mic.head;
661
662 if (need_rts) {
663 if (tx_context->pkt_type == PK_TYPE_11B)
664 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
665 tx_context->pkt_type, frame_len, current_rate);
666 else /* PK_TYPE_11A */
667 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
668 tx_context->pkt_type, frame_len, current_rate);
669
670 if (tx_context->fb_option &&
671 tx_context->pkt_type == PK_TYPE_11A)
672 return vnt_rxtx_rts_a_fb_head(tx_context,
673 &head->rts_a_fb);
674
675 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
676 }
677
678 if (tx_context->pkt_type == PK_TYPE_11A)
679 return vnt_rxtx_datahead_a_fb(tx_context,
680 &head->data_head_a_fb);
681
682 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
683 }
684
685 static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
686 struct vnt_tx_buffer *tx_buffer,
687 struct vnt_mic_hdr **mic_hdr, u32 need_mic,
688 bool need_rts)
689 {
690
691 if (tx_context->pkt_type == PK_TYPE_11GB ||
692 tx_context->pkt_type == PK_TYPE_11GA) {
693 if (need_rts) {
694 if (need_mic)
695 *mic_hdr = &tx_buffer->
696 tx_head.tx_rts.tx.mic.hdr;
697
698 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
699 need_mic);
700 }
701
702 if (need_mic)
703 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
704
705 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
706 }
707
708 if (need_mic)
709 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
710
711 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
712 }
713
714 static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
715 u8 *key_buffer, struct ieee80211_key_conf *tx_key, struct sk_buff *skb,
716 u16 payload_len, struct vnt_mic_hdr *mic_hdr)
717 {
718 struct ieee80211_hdr *hdr = tx_context->hdr;
719 u64 pn64;
720 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
721
722 /* strip header and icv len from payload */
723 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
724 payload_len -= tx_key->icv_len;
725
726 switch (tx_key->cipher) {
727 case WLAN_CIPHER_SUITE_WEP40:
728 case WLAN_CIPHER_SUITE_WEP104:
729 memcpy(key_buffer, iv, 3);
730 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
731
732 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
733 memcpy(key_buffer + 8, iv, 3);
734 memcpy(key_buffer + 11,
735 tx_key->key, WLAN_KEY_LEN_WEP40);
736 }
737
738 break;
739 case WLAN_CIPHER_SUITE_TKIP:
740 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
741
742 break;
743 case WLAN_CIPHER_SUITE_CCMP:
744
745 if (!mic_hdr)
746 return;
747
748 mic_hdr->id = 0x59;
749 mic_hdr->payload_len = cpu_to_be16(payload_len);
750 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
751
752 pn64 = atomic64_read(&tx_key->tx_pn);
753 mic_hdr->ccmp_pn[5] = pn64;
754 mic_hdr->ccmp_pn[4] = pn64 >> 8;
755 mic_hdr->ccmp_pn[3] = pn64 >> 16;
756 mic_hdr->ccmp_pn[2] = pn64 >> 24;
757 mic_hdr->ccmp_pn[1] = pn64 >> 32;
758 mic_hdr->ccmp_pn[0] = pn64 >> 40;
759
760 if (ieee80211_has_a4(hdr->frame_control))
761 mic_hdr->hlen = cpu_to_be16(28);
762 else
763 mic_hdr->hlen = cpu_to_be16(22);
764
765 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
766 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
767 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
768
769 mic_hdr->frame_control = cpu_to_le16(
770 le16_to_cpu(hdr->frame_control) & 0xc78f);
771 mic_hdr->seq_ctrl = cpu_to_le16(
772 le16_to_cpu(hdr->seq_ctrl) & 0xf);
773
774 if (ieee80211_has_a4(hdr->frame_control))
775 ether_addr_copy(mic_hdr->addr4, hdr->addr4);
776
777
778 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
779
780 break;
781 default:
782 break;
783 }
784
785 }
786
787 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
788 {
789 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
790 struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
791 struct ieee80211_rate *rate;
792 struct ieee80211_key_conf *tx_key;
793 struct ieee80211_hdr *hdr;
794 struct vnt_mic_hdr *mic_hdr = NULL;
795 struct vnt_tx_buffer *tx_buffer;
796 struct vnt_tx_fifo_head *tx_buffer_head;
797 struct vnt_usb_send_context *tx_context;
798 unsigned long flags;
799 u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
800 u8 pkt_type, fb_option = AUTO_FB_NONE;
801 bool need_rts = false, is_pspoll = false;
802 bool need_mic = false;
803
804 hdr = (struct ieee80211_hdr *)(skb->data);
805
806 rate = ieee80211_get_tx_rate(priv->hw, info);
807
808 current_rate = rate->hw_value;
809 if (priv->current_rate != current_rate &&
810 !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
811 priv->current_rate = current_rate;
812 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
813 }
814
815 if (current_rate > RATE_11M) {
816 if (info->band == NL80211_BAND_5GHZ) {
817 pkt_type = PK_TYPE_11A;
818 } else {
819 if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
820 pkt_type = PK_TYPE_11GB;
821 else
822 pkt_type = PK_TYPE_11GA;
823 }
824 } else {
825 pkt_type = PK_TYPE_11B;
826 }
827
828 spin_lock_irqsave(&priv->lock, flags);
829
830 tx_context = vnt_get_free_context(priv);
831 if (!tx_context) {
832 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
833 spin_unlock_irqrestore(&priv->lock, flags);
834 return -ENOMEM;
835 }
836
837 tx_context->skb = skb;
838 tx_context->pkt_type = pkt_type;
839 tx_context->need_ack = false;
840 tx_context->frame_len = skb->len + 4;
841 tx_context->tx_rate = current_rate;
842
843 spin_unlock_irqrestore(&priv->lock, flags);
844
845 tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
846 tx_buffer_head = &tx_buffer->fifo_head;
847 tx_body_size = skb->len;
848
849 /*Set fifo controls */
850 if (pkt_type == PK_TYPE_11A)
851 tx_buffer_head->fifo_ctl = 0;
852 else if (pkt_type == PK_TYPE_11B)
853 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
854 else if (pkt_type == PK_TYPE_11GB)
855 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
856 else if (pkt_type == PK_TYPE_11GA)
857 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
858
859 if (!ieee80211_is_data(hdr->frame_control)) {
860 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
861 FIFOCTL_ISDMA0);
862 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
863
864 tx_buffer_head->time_stamp =
865 cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
866 } else {
867 tx_buffer_head->time_stamp =
868 cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
869 }
870
871 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
872 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
873 tx_context->need_ack = true;
874 }
875
876 if (ieee80211_has_retry(hdr->frame_control))
877 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
878
879 if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
880 priv->preamble_type = PREAMBLE_SHORT;
881 else
882 priv->preamble_type = PREAMBLE_LONG;
883
884 if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
885 need_rts = true;
886 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
887 }
888
889 if (ieee80211_has_a4(hdr->frame_control))
890 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
891
892 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
893 is_pspoll = true;
894
895 tx_buffer_head->frag_ctl =
896 cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
897
898 if (info->control.hw_key) {
899 tx_key = info->control.hw_key;
900 switch (info->control.hw_key->cipher) {
901 case WLAN_CIPHER_SUITE_WEP40:
902 case WLAN_CIPHER_SUITE_WEP104:
903 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
904 break;
905 case WLAN_CIPHER_SUITE_TKIP:
906 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
907 break;
908 case WLAN_CIPHER_SUITE_CCMP:
909 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
910 need_mic = true;
911 default:
912 break;
913 }
914 tx_context->frame_len += tx_key->icv_len;
915 }
916
917 tx_buffer_head->current_rate = cpu_to_le16(current_rate);
918
919 /* legacy rates TODO use ieee80211_tx_rate */
920 if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
921 if (priv->auto_fb_ctrl == AUTO_FB_0) {
922 tx_buffer_head->fifo_ctl |=
923 cpu_to_le16(FIFOCTL_AUTO_FB_0);
924
925 priv->tx_rate_fb0 =
926 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
927 priv->tx_rate_fb1 =
928 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
929
930 fb_option = AUTO_FB_0;
931 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
932 tx_buffer_head->fifo_ctl |=
933 cpu_to_le16(FIFOCTL_AUTO_FB_1);
934
935 priv->tx_rate_fb0 =
936 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
937 priv->tx_rate_fb1 =
938 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
939
940 fb_option = AUTO_FB_1;
941 }
942 }
943
944 tx_context->fb_option = fb_option;
945
946 duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
947 need_mic, need_rts);
948
949 tx_header_size = tx_context->tx_hdr_size;
950 if (!tx_header_size) {
951 tx_context->in_use = false;
952 return -ENOMEM;
953 }
954
955 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
956
957 tx_bytes = tx_header_size + tx_body_size;
958
959 memcpy(tx_context->hdr, skb->data, tx_body_size);
960
961 hdr->duration_id = cpu_to_le16(duration_id);
962
963 if (info->control.hw_key) {
964 tx_key = info->control.hw_key;
965 if (tx_key->keylen > 0)
966 vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
967 tx_key, skb, tx_body_size, mic_hdr);
968 }
969
970 priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
971 IEEE80211_SCTL_SEQ) >> 4;
972
973 tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
974 tx_buffer->pkt_no = tx_context->pkt_no;
975 tx_buffer->type = 0x00;
976
977 tx_bytes += 4;
978
979 tx_context->type = CONTEXT_DATA_PACKET;
980 tx_context->buf_len = tx_bytes;
981
982 spin_lock_irqsave(&priv->lock, flags);
983
984 if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
985 spin_unlock_irqrestore(&priv->lock, flags);
986 return -EIO;
987 }
988
989 spin_unlock_irqrestore(&priv->lock, flags);
990
991 return 0;
992 }
993
994 static int vnt_beacon_xmit(struct vnt_private *priv,
995 struct sk_buff *skb)
996 {
997 struct vnt_beacon_buffer *beacon_buffer;
998 struct vnt_tx_short_buf_head *short_head;
999 struct ieee80211_tx_info *info;
1000 struct vnt_usb_send_context *context;
1001 struct ieee80211_mgmt *mgmt_hdr;
1002 unsigned long flags;
1003 u32 frame_size = skb->len + 4;
1004 u16 current_rate, count;
1005
1006 spin_lock_irqsave(&priv->lock, flags);
1007
1008 context = vnt_get_free_context(priv);
1009 if (!context) {
1010 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
1011 spin_unlock_irqrestore(&priv->lock, flags);
1012 return -ENOMEM;
1013 }
1014
1015 context->skb = skb;
1016
1017 spin_unlock_irqrestore(&priv->lock, flags);
1018
1019 beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1020 short_head = &beacon_buffer->short_head;
1021
1022 if (priv->bb_type == BB_TYPE_11A) {
1023 current_rate = RATE_6M;
1024
1025 /* Get SignalField,ServiceField,Length */
1026 vnt_get_phy_field(priv, frame_size, current_rate,
1027 PK_TYPE_11A, &short_head->ab);
1028
1029 /* Get Duration and TimeStampOff */
1030 short_head->duration = vnt_get_duration_le(priv,
1031 PK_TYPE_11A, false);
1032 short_head->time_stamp_off =
1033 vnt_time_stamp_off(priv, current_rate);
1034 } else {
1035 current_rate = RATE_1M;
1036 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1037
1038 /* Get SignalField,ServiceField,Length */
1039 vnt_get_phy_field(priv, frame_size, current_rate,
1040 PK_TYPE_11B, &short_head->ab);
1041
1042 /* Get Duration and TimeStampOff */
1043 short_head->duration = vnt_get_duration_le(priv,
1044 PK_TYPE_11B, false);
1045 short_head->time_stamp_off =
1046 vnt_time_stamp_off(priv, current_rate);
1047 }
1048
1049 /* Generate Beacon Header */
1050 mgmt_hdr = &beacon_buffer->mgmt_hdr;
1051 memcpy(mgmt_hdr, skb->data, skb->len);
1052
1053 /* time stamp always 0 */
1054 mgmt_hdr->u.beacon.timestamp = 0;
1055
1056 info = IEEE80211_SKB_CB(skb);
1057 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1058 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1059
1060 hdr->duration_id = 0;
1061 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1062 }
1063
1064 priv->seq_counter++;
1065 if (priv->seq_counter > 0x0fff)
1066 priv->seq_counter = 0;
1067
1068 count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1069
1070 beacon_buffer->tx_byte_count = cpu_to_le16(count);
1071 beacon_buffer->pkt_no = context->pkt_no;
1072 beacon_buffer->type = 0x01;
1073
1074 context->type = CONTEXT_BEACON_PACKET;
1075 context->buf_len = count + 4; /* USB header */
1076
1077 spin_lock_irqsave(&priv->lock, flags);
1078
1079 if (vnt_tx_context(priv, context) != STATUS_PENDING)
1080 ieee80211_free_txskb(priv->hw, context->skb);
1081
1082 spin_unlock_irqrestore(&priv->lock, flags);
1083
1084 return 0;
1085 }
1086
1087 int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1088 {
1089 struct sk_buff *beacon;
1090
1091 beacon = ieee80211_beacon_get(priv->hw, vif);
1092 if (!beacon)
1093 return -ENOMEM;
1094
1095 if (vnt_beacon_xmit(priv, beacon)) {
1096 ieee80211_free_txskb(priv->hw, beacon);
1097 return -ENODEV;
1098 }
1099
1100 return 0;
1101 }
1102
1103 int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1104 struct ieee80211_bss_conf *conf)
1105 {
1106 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1107
1108 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1109
1110 vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1111
1112 vnt_clear_current_tsf(priv);
1113
1114 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1115
1116 vnt_reset_next_tbtt(priv, conf->beacon_int);
1117
1118 return vnt_beacon_make(priv, vif);
1119 }
Ubuntu Artful kernel mirror