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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / staging / vt6656 / rxtx.c
blob29caba728906b9077b04dd5afb347d36d5e8686f
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
4 * All rights reserved.
5 *
6 * File: rxtx.c
7 *
8 * Purpose: handle WMAC/802.3/802.11 rx & tx functions
9 *
10 * Author: Lyndon Chen
11 *
12 * Date: May 20, 2003
13 *
14 * Functions:
15 * vnt_generate_tx_parameter - Generate tx dma required parameter.
16 * vnt_get_duration_le - get tx data required duration
17 * vnt_get_rtscts_duration_le- get rtx/cts required duration
18 * vnt_get_rtscts_rsvtime_le- get rts/cts reserved time
19 * vnt_get_rsvtime- get frame reserved time
20 * vnt_fill_cts_head- fulfill CTS ctl header
21 *
22 * Revision History:
23 *
24 */
25
26 #include <linux/etherdevice.h>
27 #include "device.h"
28 #include "rxtx.h"
29 #include "card.h"
30 #include "mac.h"
31 #include "rf.h"
32 #include "usbpipe.h"
33
34 static const u16 vnt_time_stampoff[2][MAX_RATE] = {
35 /* Long Preamble */
36 {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},
37
38 /* Short Preamble */
39 {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},
40 };
41
42 static const u16 vnt_fb_opt0[2][5] = {
43 {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */
44 {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */
45 };
46
47 static const u16 vnt_fb_opt1[2][5] = {
48 {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */
49 {RATE_6M, RATE_6M, RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */
50 };
51
52 #define RTSDUR_BB 0
53 #define RTSDUR_BA 1
54 #define RTSDUR_AA 2
55 #define CTSDUR_BA 3
56 #define RTSDUR_BA_F0 4
57 #define RTSDUR_AA_F0 5
58 #define RTSDUR_BA_F1 6
59 #define RTSDUR_AA_F1 7
60 #define CTSDUR_BA_F0 8
61 #define CTSDUR_BA_F1 9
62 #define DATADUR_B 10
63 #define DATADUR_A 11
64 #define DATADUR_A_F0 12
65 #define DATADUR_A_F1 13
66
67 static struct vnt_usb_send_context
68 *vnt_get_free_context(struct vnt_private *priv)
69 {
70 struct vnt_usb_send_context *context = NULL;
71 int ii;
72
73 dev_dbg(&priv->usb->dev, "%s\n", __func__);
74
75 for (ii = 0; ii < priv->num_tx_context; ii++) {
76 if (!priv->tx_context[ii])
77 return NULL;
78
79 context = priv->tx_context[ii];
80 if (!context->in_use) {
81 context->in_use = true;
82 memset(context->data, 0,
83 MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
84
85 context->hdr = NULL;
86
87 return context;
88 }
89 }
90
91 if (ii == priv->num_tx_context) {
92 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
93
94 ieee80211_stop_queues(priv->hw);
95 }
96
97 return NULL;
98 }
99
100 static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
101 {
102 return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
103 [rate % MAX_RATE]);
104 }
105
106 static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
107 u32 frame_length, u16 rate, int need_ack)
108 {
109 u32 data_time, ack_time;
110
111 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
112 frame_length, rate);
113
114 if (pkt_type == PK_TYPE_11B)
115 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, 14,
116 (u16)priv->top_cck_basic_rate);
117 else
118 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, 14,
119 (u16)priv->top_ofdm_basic_rate);
120
121 if (need_ack)
122 return data_time + priv->sifs + ack_time;
123
124 return data_time;
125 }
126
127 static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
128 u32 frame_length, u16 rate, int need_ack)
129 {
130 return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
131 frame_length, rate, need_ack));
132 }
133
134 static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv, u8 rsv_type,
135 u8 pkt_type, u32 frame_length,
136 u16 current_rate)
137 {
138 u32 rrv_time, rts_time, cts_time, ack_time, data_time;
139
140 rrv_time = 0;
141 rts_time = 0;
142 cts_time = 0;
143 ack_time = 0;
144
145 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
146 frame_length, current_rate);
147
148 if (rsv_type == 0) {
149 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
150 20, priv->top_cck_basic_rate);
151 ack_time = vnt_get_frame_time(priv->preamble_type,
152 pkt_type, 14,
153 priv->top_cck_basic_rate);
154 cts_time = ack_time;
155
156 } else if (rsv_type == 1) {
157 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
158 20, priv->top_cck_basic_rate);
159 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
160 14, priv->top_cck_basic_rate);
161 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
162 14, priv->top_ofdm_basic_rate);
163 } else if (rsv_type == 2) {
164 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
165 20, priv->top_ofdm_basic_rate);
166 ack_time = vnt_get_frame_time(priv->preamble_type,
167 pkt_type, 14,
168 priv->top_ofdm_basic_rate);
169 cts_time = ack_time;
170
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, u8 pkt_type,
188 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,
196 priv->top_cck_basic_rate);
197 else
198 ack_time = vnt_get_frame_time(priv->preamble_type,
199 pkt_type, 14,
200 priv->top_ofdm_basic_rate);
201
202 return cpu_to_le16((u16)(priv->sifs + ack_time));
203 }
204
205 return 0;
206 }
207
208 static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
209 u8 dur_type, u8 pkt_type, u16 rate)
210 {
211 struct vnt_private *priv = context->priv;
212 u32 cts_time = 0, dur_time = 0;
213 u32 frame_length = context->frame_len;
214 u8 need_ack = context->need_ack;
215
216 switch (dur_type) {
217 case RTSDUR_BB:
218 case RTSDUR_BA:
219 case RTSDUR_BA_F0:
220 case RTSDUR_BA_F1:
221 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
222 14, priv->top_cck_basic_rate);
223 dur_time = cts_time + 2 * priv->sifs +
224 vnt_get_rsvtime(priv, pkt_type,
225 frame_length, rate, need_ack);
226 break;
227
228 case RTSDUR_AA:
229 case RTSDUR_AA_F0:
230 case RTSDUR_AA_F1:
231 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
232 14, priv->top_ofdm_basic_rate);
233 dur_time = cts_time + 2 * priv->sifs +
234 vnt_get_rsvtime(priv, pkt_type,
235 frame_length, rate, need_ack);
236 break;
237
238 case CTSDUR_BA:
239 case CTSDUR_BA_F0:
240 case CTSDUR_BA_F1:
241 dur_time = priv->sifs + vnt_get_rsvtime(priv,
242 pkt_type, frame_length, rate, need_ack);
243 break;
244
245 default:
246 break;
247 }
248
249 return cpu_to_le16((u16)dur_time);
250 }
251
252 static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
253 struct ieee80211_hdr *hdr)
254 {
255 u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
256 u8 *hdr_pos = (u8 *)hdr;
257
258 tx_context->hdr = hdr;
259 if (!tx_context->hdr)
260 return 0;
261
262 return (u16)(hdr_pos - head);
263 }
264
265 static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
266 struct vnt_tx_datahead_g *buf)
267 {
268 struct vnt_private *priv = tx_context->priv;
269 struct ieee80211_hdr *hdr =
270 (struct ieee80211_hdr *)tx_context->skb->data;
271 u32 frame_len = tx_context->frame_len;
272 u16 rate = tx_context->tx_rate;
273 u8 need_ack = tx_context->need_ack;
274
275 /* Get SignalField,ServiceField,Length */
276 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
277 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
278 PK_TYPE_11B, &buf->b);
279
280 /* Get Duration and TimeStamp */
281 if (ieee80211_is_nullfunc(hdr->frame_control)) {
282 buf->duration_a = hdr->duration_id;
283 buf->duration_b = hdr->duration_id;
284 } else {
285 buf->duration_a = vnt_get_duration_le(priv,
286 tx_context->pkt_type, need_ack);
287 buf->duration_b = vnt_get_duration_le(priv,
288 PK_TYPE_11B, need_ack);
289 }
290
291 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
292 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
293 priv->top_cck_basic_rate);
294
295 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
296
297 return le16_to_cpu(buf->duration_a);
298 }
299
300 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
301 struct vnt_tx_datahead_g_fb *buf)
302 {
303 struct vnt_private *priv = tx_context->priv;
304 u32 frame_len = tx_context->frame_len;
305 u16 rate = tx_context->tx_rate;
306 u8 need_ack = tx_context->need_ack;
307
308 /* Get SignalField,ServiceField,Length */
309 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
310
311 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
312 PK_TYPE_11B, &buf->b);
313
314 /* Get Duration and TimeStamp */
315 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
316 need_ack);
317 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
318
319 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
320 need_ack);
321 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
322 need_ack);
323
324 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
325 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
326 priv->top_cck_basic_rate);
327
328 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
329
330 return le16_to_cpu(buf->duration_a);
331 }
332
333 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
334 struct vnt_tx_datahead_a_fb *buf)
335 {
336 struct vnt_private *priv = tx_context->priv;
337 u16 rate = tx_context->tx_rate;
338 u8 pkt_type = tx_context->pkt_type;
339 u8 need_ack = tx_context->need_ack;
340 u32 frame_len = tx_context->frame_len;
341
342 /* Get SignalField,ServiceField,Length */
343 vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
344 /* Get Duration and TimeStampOff */
345 buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
346
347 buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
348 buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
349
350 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
351
352 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
353
354 return le16_to_cpu(buf->duration);
355 }
356
357 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
358 struct vnt_tx_datahead_ab *buf)
359 {
360 struct vnt_private *priv = tx_context->priv;
361 struct ieee80211_hdr *hdr =
362 (struct ieee80211_hdr *)tx_context->skb->data;
363 u32 frame_len = tx_context->frame_len;
364 u16 rate = tx_context->tx_rate;
365 u8 need_ack = tx_context->need_ack;
366
367 /* Get SignalField,ServiceField,Length */
368 vnt_get_phy_field(priv, frame_len, rate,
369 tx_context->pkt_type, &buf->ab);
370
371 /* Get Duration and TimeStampOff */
372 if (ieee80211_is_nullfunc(hdr->frame_control)) {
373 buf->duration = hdr->duration_id;
374 } else {
375 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
376 need_ack);
377 }
378
379 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
380
381 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
382
383 return le16_to_cpu(buf->duration);
384 }
385
386 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
387 struct ieee80211_rts *rts, __le16 duration)
388 {
389 struct ieee80211_hdr *hdr =
390 (struct ieee80211_hdr *)tx_context->skb->data;
391
392 rts->duration = duration;
393 rts->frame_control =
394 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
395
396 ether_addr_copy(rts->ra, hdr->addr1);
397 ether_addr_copy(rts->ta, hdr->addr2);
398
399 return 0;
400 }
401
402 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
403 struct vnt_rts_g *buf)
404 {
405 struct vnt_private *priv = tx_context->priv;
406 u16 rts_frame_len = 20;
407 u16 current_rate = tx_context->tx_rate;
408
409 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
410 PK_TYPE_11B, &buf->b);
411 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
412 tx_context->pkt_type, &buf->a);
413
414 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
415 PK_TYPE_11B,
416 priv->top_cck_basic_rate);
417 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
418 tx_context->pkt_type,
419 current_rate);
420 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
421 tx_context->pkt_type,
422 current_rate);
423
424 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
425
426 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
427 }
428
429 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
430 struct vnt_rts_g_fb *buf)
431 {
432 struct vnt_private *priv = tx_context->priv;
433 u16 current_rate = tx_context->tx_rate;
434 u16 rts_frame_len = 20;
435
436 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
437 PK_TYPE_11B, &buf->b);
438 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
439 tx_context->pkt_type, &buf->a);
440
441 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
442 PK_TYPE_11B,
443 priv->top_cck_basic_rate);
444 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
445 tx_context->pkt_type,
446 current_rate);
447 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
448 tx_context->pkt_type,
449 current_rate);
450
451 buf->rts_duration_ba_f0 =
452 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
453 tx_context->pkt_type,
454 priv->tx_rate_fb0);
455 buf->rts_duration_aa_f0 =
456 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
457 tx_context->pkt_type,
458 priv->tx_rate_fb0);
459 buf->rts_duration_ba_f1 =
460 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
461 tx_context->pkt_type,
462 priv->tx_rate_fb1);
463 buf->rts_duration_aa_f1 =
464 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
465 tx_context->pkt_type,
466 priv->tx_rate_fb1);
467
468 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
469
470 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
471 }
472
473 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
474 struct vnt_rts_ab *buf)
475 {
476 struct vnt_private *priv = tx_context->priv;
477 u16 current_rate = tx_context->tx_rate;
478 u16 rts_frame_len = 20;
479
480 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
481 tx_context->pkt_type, &buf->ab);
482
483 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
484 tx_context->pkt_type,
485 current_rate);
486
487 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
488
489 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
490 }
491
492 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
493 struct vnt_rts_a_fb *buf)
494 {
495 struct vnt_private *priv = tx_context->priv;
496 u16 current_rate = tx_context->tx_rate;
497 u16 rts_frame_len = 20;
498
499 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
500 tx_context->pkt_type, &buf->a);
501
502 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
503 tx_context->pkt_type,
504 current_rate);
505
506 buf->rts_duration_f0 =
507 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
508 tx_context->pkt_type,
509 priv->tx_rate_fb0);
510
511 buf->rts_duration_f1 =
512 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
513 tx_context->pkt_type,
514 priv->tx_rate_fb1);
515
516 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
517
518 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
519 }
520
521 static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
522 union vnt_tx_data_head *head)
523 {
524 struct vnt_private *priv = tx_context->priv;
525 struct vnt_cts_fb *buf = &head->cts_g_fb;
526 u32 cts_frame_len = 14;
527 u16 current_rate = tx_context->tx_rate;
528
529 /* Get SignalField,ServiceField,Length */
530 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
531 PK_TYPE_11B, &buf->b);
532
533 buf->duration_ba =
534 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
535 tx_context->pkt_type,
536 current_rate);
537 /* Get CTSDuration_ba_f0 */
538 buf->cts_duration_ba_f0 =
539 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
540 tx_context->pkt_type,
541 priv->tx_rate_fb0);
542 /* Get CTSDuration_ba_f1 */
543 buf->cts_duration_ba_f1 =
544 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
545 tx_context->pkt_type,
546 priv->tx_rate_fb1);
547 /* Get CTS Frame body */
548 buf->data.duration = buf->duration_ba;
549 buf->data.frame_control =
550 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
551
552 ether_addr_copy(buf->data.ra, priv->current_net_addr);
553
554 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
555 }
556
557 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
558 union vnt_tx_data_head *head)
559 {
560 struct vnt_private *priv = tx_context->priv;
561 struct vnt_cts *buf = &head->cts_g;
562 u32 cts_frame_len = 14;
563 u16 current_rate = tx_context->tx_rate;
564
565 /* Get SignalField,ServiceField,Length */
566 vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
567 PK_TYPE_11B, &buf->b);
568 /* Get CTSDuration_ba */
569 buf->duration_ba =
570 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
571 tx_context->pkt_type,
572 current_rate);
573 /*Get CTS Frame body*/
574 buf->data.duration = buf->duration_ba;
575 buf->data.frame_control =
576 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
577
578 ether_addr_copy(buf->data.ra, priv->current_net_addr);
579
580 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
581 }
582
583 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
584 union vnt_tx_head *tx_head, bool need_mic)
585 {
586 struct vnt_private *priv = tx_context->priv;
587 struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
588 union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
589 u32 frame_len = tx_context->frame_len;
590 u16 current_rate = tx_context->tx_rate;
591 u8 need_ack = tx_context->need_ack;
592
593 buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
594 tx_context->pkt_type, frame_len, current_rate);
595 buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
596 tx_context->pkt_type, frame_len, current_rate);
597 buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
598 tx_context->pkt_type, frame_len, current_rate);
599
600 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
601 frame_len, current_rate,
602 need_ack);
603 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
604 priv->top_cck_basic_rate, need_ack);
605
606 if (need_mic)
607 head = &tx_head->tx_rts.tx.mic.head;
608
609 if (tx_context->fb_option)
610 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
611
612 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
613 }
614
615 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
616 union vnt_tx_head *tx_head, bool need_mic)
617 {
618 struct vnt_private *priv = tx_context->priv;
619 struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
620 union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
621 u32 frame_len = tx_context->frame_len;
622 u16 current_rate = tx_context->tx_rate;
623 u8 need_ack = tx_context->need_ack;
624
625 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
626 frame_len, current_rate, need_ack);
627 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
628 frame_len, priv->top_cck_basic_rate, need_ack);
629
630 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
631 tx_context->pkt_type, frame_len, current_rate);
632
633 if (need_mic)
634 head = &tx_head->tx_cts.tx.mic.head;
635
636 /* Fill CTS */
637 if (tx_context->fb_option)
638 return vnt_fill_cts_fb_head(tx_context, head);
639
640 return vnt_fill_cts_head(tx_context, head);
641 }
642
643 static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
644 union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
645 {
646 struct vnt_private *priv = tx_context->priv;
647 struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
648 union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
649 u32 frame_len = tx_context->frame_len;
650 u16 current_rate = tx_context->tx_rate;
651 u8 need_ack = tx_context->need_ack;
652
653 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
654 frame_len, current_rate, need_ack);
655
656 if (need_mic)
657 head = &tx_head->tx_ab.tx.mic.head;
658
659 if (need_rts) {
660 if (tx_context->pkt_type == PK_TYPE_11B)
661 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
662 tx_context->pkt_type, frame_len, current_rate);
663 else /* PK_TYPE_11A */
664 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
665 tx_context->pkt_type, frame_len, current_rate);
666
667 if (tx_context->fb_option &&
668 tx_context->pkt_type == PK_TYPE_11A)
669 return vnt_rxtx_rts_a_fb_head(tx_context,
670 &head->rts_a_fb);
671
672 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
673 }
674
675 if (tx_context->pkt_type == PK_TYPE_11A)
676 return vnt_rxtx_datahead_a_fb(tx_context,
677 &head->data_head_a_fb);
678
679 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
680 }
681
682 static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
683 struct vnt_tx_buffer *tx_buffer,
684 struct vnt_mic_hdr **mic_hdr, u32 need_mic,
685 bool need_rts)
686 {
687 if (tx_context->pkt_type == PK_TYPE_11GB ||
688 tx_context->pkt_type == PK_TYPE_11GA) {
689 if (need_rts) {
690 if (need_mic)
691 *mic_hdr =
692 &tx_buffer->tx_head.tx_rts.tx.mic.hdr;
693
694 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
695 need_mic);
696 }
697
698 if (need_mic)
699 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
700
701 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
702 }
703
704 if (need_mic)
705 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
706
707 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
708 }
709
710 static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
711 u8 *key_buffer, struct ieee80211_key_conf *tx_key,
712 struct sk_buff *skb, u16 payload_len,
713 struct vnt_mic_hdr *mic_hdr)
714 {
715 struct ieee80211_hdr *hdr = tx_context->hdr;
716 u64 pn64;
717 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
718
719 /* strip header and icv len from payload */
720 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
721 payload_len -= tx_key->icv_len;
722
723 switch (tx_key->cipher) {
724 case WLAN_CIPHER_SUITE_WEP40:
725 case WLAN_CIPHER_SUITE_WEP104:
726 memcpy(key_buffer, iv, 3);
727 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
728
729 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
730 memcpy(key_buffer + 8, iv, 3);
731 memcpy(key_buffer + 11,
732 tx_key->key, WLAN_KEY_LEN_WEP40);
733 }
734
735 break;
736 case WLAN_CIPHER_SUITE_TKIP:
737 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
738
739 break;
740 case WLAN_CIPHER_SUITE_CCMP:
741
742 if (!mic_hdr)
743 return;
744
745 mic_hdr->id = 0x59;
746 mic_hdr->payload_len = cpu_to_be16(payload_len);
747 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
748
749 pn64 = atomic64_read(&tx_key->tx_pn);
750 mic_hdr->ccmp_pn[5] = pn64;
751 mic_hdr->ccmp_pn[4] = pn64 >> 8;
752 mic_hdr->ccmp_pn[3] = pn64 >> 16;
753 mic_hdr->ccmp_pn[2] = pn64 >> 24;
754 mic_hdr->ccmp_pn[1] = pn64 >> 32;
755 mic_hdr->ccmp_pn[0] = pn64 >> 40;
756
757 if (ieee80211_has_a4(hdr->frame_control))
758 mic_hdr->hlen = cpu_to_be16(28);
759 else
760 mic_hdr->hlen = cpu_to_be16(22);
761
762 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
763 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
764 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
765
766 mic_hdr->frame_control = cpu_to_le16(
767 le16_to_cpu(hdr->frame_control) & 0xc78f);
768 mic_hdr->seq_ctrl = cpu_to_le16(
769 le16_to_cpu(hdr->seq_ctrl) & 0xf);
770
771 if (ieee80211_has_a4(hdr->frame_control))
772 ether_addr_copy(mic_hdr->addr4, hdr->addr4);
773
774 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
775
776 break;
777 default:
778 break;
779 }
780 }
781
782 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
783 {
784 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
785 struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
786 struct ieee80211_rate *rate;
787 struct ieee80211_key_conf *tx_key;
788 struct ieee80211_hdr *hdr;
789 struct vnt_mic_hdr *mic_hdr = NULL;
790 struct vnt_tx_buffer *tx_buffer;
791 struct vnt_tx_fifo_head *tx_buffer_head;
792 struct vnt_usb_send_context *tx_context;
793 unsigned long flags;
794 u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
795 u8 pkt_type, fb_option = AUTO_FB_NONE;
796 bool need_rts = false;
797 bool need_mic = false;
798
799 hdr = (struct ieee80211_hdr *)(skb->data);
800
801 rate = ieee80211_get_tx_rate(priv->hw, info);
802
803 current_rate = rate->hw_value;
804 if (priv->current_rate != current_rate &&
805 !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
806 priv->current_rate = current_rate;
807 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
808 }
809
810 if (current_rate > RATE_11M) {
811 if (info->band == NL80211_BAND_5GHZ) {
812 pkt_type = PK_TYPE_11A;
813 } else {
814 if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
815 if (priv->basic_rates & VNT_B_RATES)
816 pkt_type = PK_TYPE_11GB;
817 else
818 pkt_type = PK_TYPE_11GA;
819 } else {
820 pkt_type = PK_TYPE_11A;
821 }
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 tx_buffer_head->frag_ctl =
892 cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
893
894 if (info->control.hw_key) {
895 tx_key = info->control.hw_key;
896 switch (info->control.hw_key->cipher) {
897 case WLAN_CIPHER_SUITE_WEP40:
898 case WLAN_CIPHER_SUITE_WEP104:
899 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
900 break;
901 case WLAN_CIPHER_SUITE_TKIP:
902 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
903 break;
904 case WLAN_CIPHER_SUITE_CCMP:
905 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
906 need_mic = true;
907 default:
908 break;
909 }
910 tx_context->frame_len += tx_key->icv_len;
911 }
912
913 tx_buffer_head->current_rate = cpu_to_le16(current_rate);
914
915 /* legacy rates TODO use ieee80211_tx_rate */
916 if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
917 if (priv->auto_fb_ctrl == AUTO_FB_0) {
918 tx_buffer_head->fifo_ctl |=
919 cpu_to_le16(FIFOCTL_AUTO_FB_0);
920
921 priv->tx_rate_fb0 =
922 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
923 priv->tx_rate_fb1 =
924 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
925
926 fb_option = AUTO_FB_0;
927 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
928 tx_buffer_head->fifo_ctl |=
929 cpu_to_le16(FIFOCTL_AUTO_FB_1);
930
931 priv->tx_rate_fb0 =
932 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
933 priv->tx_rate_fb1 =
934 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
935
936 fb_option = AUTO_FB_1;
937 }
938 }
939
940 tx_context->fb_option = fb_option;
941
942 duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
943 need_mic, need_rts);
944
945 tx_header_size = tx_context->tx_hdr_size;
946 if (!tx_header_size) {
947 tx_context->in_use = false;
948 return -ENOMEM;
949 }
950
951 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
952
953 tx_bytes = tx_header_size + tx_body_size;
954
955 memcpy(tx_context->hdr, skb->data, tx_body_size);
956
957 hdr->duration_id = cpu_to_le16(duration_id);
958
959 if (info->control.hw_key) {
960 tx_key = info->control.hw_key;
961 if (tx_key->keylen > 0)
962 vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
963 tx_key, skb, tx_body_size, mic_hdr);
964 }
965
966 priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
967 IEEE80211_SCTL_SEQ) >> 4;
968
969 tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
970 tx_buffer->pkt_no = tx_context->pkt_no;
971 tx_buffer->type = 0x00;
972
973 tx_bytes += 4;
974
975 tx_context->type = CONTEXT_DATA_PACKET;
976 tx_context->buf_len = tx_bytes;
977
978 spin_lock_irqsave(&priv->lock, flags);
979
980 if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
981 spin_unlock_irqrestore(&priv->lock, flags);
982 return -EIO;
983 }
984
985 spin_unlock_irqrestore(&priv->lock, flags);
986
987 return 0;
988 }
989
990 static int vnt_beacon_xmit(struct vnt_private *priv, struct sk_buff *skb)
991 {
992 struct vnt_beacon_buffer *beacon_buffer;
993 struct vnt_tx_short_buf_head *short_head;
994 struct ieee80211_tx_info *info;
995 struct vnt_usb_send_context *context;
996 struct ieee80211_mgmt *mgmt_hdr;
997 unsigned long flags;
998 u32 frame_size = skb->len + 4;
999 u16 current_rate, count;
1000
1001 spin_lock_irqsave(&priv->lock, flags);
1002
1003 context = vnt_get_free_context(priv);
1004 if (!context) {
1005 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
1006 spin_unlock_irqrestore(&priv->lock, flags);
1007 return -ENOMEM;
1008 }
1009
1010 context->skb = skb;
1011
1012 spin_unlock_irqrestore(&priv->lock, flags);
1013
1014 beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1015 short_head = &beacon_buffer->short_head;
1016
1017 if (priv->bb_type == BB_TYPE_11A) {
1018 current_rate = RATE_6M;
1019
1020 /* Get SignalField,ServiceField,Length */
1021 vnt_get_phy_field(priv, frame_size, current_rate,
1022 PK_TYPE_11A, &short_head->ab);
1023
1024 /* Get Duration and TimeStampOff */
1025 short_head->duration = vnt_get_duration_le(priv,
1026 PK_TYPE_11A, false);
1027 short_head->time_stamp_off =
1028 vnt_time_stamp_off(priv, current_rate);
1029 } else {
1030 current_rate = RATE_1M;
1031 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1032
1033 /* Get SignalField,ServiceField,Length */
1034 vnt_get_phy_field(priv, frame_size, current_rate,
1035 PK_TYPE_11B, &short_head->ab);
1036
1037 /* Get Duration and TimeStampOff */
1038 short_head->duration = vnt_get_duration_le(priv,
1039 PK_TYPE_11B, false);
1040 short_head->time_stamp_off =
1041 vnt_time_stamp_off(priv, current_rate);
1042 }
1043
1044 /* Generate Beacon Header */
1045 mgmt_hdr = &beacon_buffer->mgmt_hdr;
1046 memcpy(mgmt_hdr, skb->data, skb->len);
1047
1048 /* time stamp always 0 */
1049 mgmt_hdr->u.beacon.timestamp = 0;
1050
1051 info = IEEE80211_SKB_CB(skb);
1052 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1053 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1054
1055 hdr->duration_id = 0;
1056 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1057 }
1058
1059 priv->seq_counter++;
1060 if (priv->seq_counter > 0x0fff)
1061 priv->seq_counter = 0;
1062
1063 count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1064
1065 beacon_buffer->tx_byte_count = cpu_to_le16(count);
1066 beacon_buffer->pkt_no = context->pkt_no;
1067 beacon_buffer->type = 0x01;
1068
1069 context->type = CONTEXT_BEACON_PACKET;
1070 context->buf_len = count + 4; /* USB header */
1071
1072 spin_lock_irqsave(&priv->lock, flags);
1073
1074 if (vnt_tx_context(priv, context) != STATUS_PENDING)
1075 ieee80211_free_txskb(priv->hw, context->skb);
1076
1077 spin_unlock_irqrestore(&priv->lock, flags);
1078
1079 return 0;
1080 }
1081
1082 int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1083 {
1084 struct sk_buff *beacon;
1085
1086 beacon = ieee80211_beacon_get(priv->hw, vif);
1087 if (!beacon)
1088 return -ENOMEM;
1089
1090 if (vnt_beacon_xmit(priv, beacon)) {
1091 ieee80211_free_txskb(priv->hw, beacon);
1092 return -ENODEV;
1093 }
1094
1095 return 0;
1096 }
1097
1098 int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1099 struct ieee80211_bss_conf *conf)
1100 {
1101 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1102
1103 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1104
1105 vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1106
1107 vnt_clear_current_tsf(priv);
1108
1109 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1110
1111 vnt_reset_next_tbtt(priv, conf->beacon_int);
1112
1113 return vnt_beacon_make(priv, vif);
1114 }
Linux with added FPC-III support