2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
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.
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.
18 * Purpose: handle WMAC/802.3/802.11 rx & tx 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
36 #include <linux/etherdevice.h>
44 static const u16 vnt_time_stampoff[2][MAX_RATE] = {
46 {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},
49 {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},
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 */
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 */
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
74 #define DATADUR_A_F0 12
75 #define DATADUR_A_F1 13
77 static struct vnt_usb_send_context
78 *vnt_get_free_context(struct vnt_private *priv)
80 struct vnt_usb_send_context *context = NULL;
83 dev_dbg(&priv->usb->dev, "%s\n", __func__);
85 for (ii = 0; ii < priv->num_tx_context; ii++) {
86 if (!priv->tx_context[ii])
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);
101 if (ii == priv->num_tx_context) {
102 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
104 ieee80211_stop_queues(priv->hw);
110 static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
112 return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
116 static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
117 u32 frame_length, u16 rate, int need_ack)
119 u32 data_time, ack_time;
121 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
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);
128 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
129 14, (u16)priv->top_ofdm_basic_rate);
132 return data_time + priv->sifs + ack_time;
137 static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
138 u32 frame_length, u16 rate, int need_ack)
140 return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
141 frame_length, rate, need_ack));
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)
147 u32 rrv_time, rts_time, cts_time, ack_time, data_time;
149 rrv_time = rts_time = cts_time = ack_time = data_time = 0;
151 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
152 frame_length, current_rate);
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);
177 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
179 return cpu_to_le16((u16)rrv_time);
182 rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
184 return cpu_to_le16((u16)rrv_time);
187 static __le16 vnt_get_duration_le(struct vnt_private *priv,
188 u8 pkt_type, int 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);
197 ack_time = vnt_get_frame_time(priv->preamble_type,
198 pkt_type, 14, priv->top_ofdm_basic_rate);
200 return cpu_to_le16((u16)(priv->sifs + ack_time));
206 static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
207 u8 dur_type, u8 pkt_type, u16 rate)
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;
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);
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);
239 dur_time = priv->sifs + vnt_get_rsvtime(priv,
240 pkt_type, frame_length, rate, need_ack);
247 return cpu_to_le16((u16)dur_time);
250 static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
251 struct ieee80211_hdr *hdr)
253 u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
254 u8 *hdr_pos = (u8 *)hdr;
256 tx_context->hdr = hdr;
257 if (!tx_context->hdr)
260 return (u16)(hdr_pos - head);
263 static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
264 struct vnt_tx_datahead_g *buf)
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;
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);
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));
283 buf->duration_a = dur;
284 buf->duration_b = dur;
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);
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);
296 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
298 return le16_to_cpu(buf->duration_a);
301 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
302 struct vnt_tx_datahead_g_fb *buf)
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;
309 /* Get SignalField,ServiceField,Length */
310 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
312 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
313 PK_TYPE_11B, &buf->b);
315 /* Get Duration and TimeStamp */
316 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
318 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
320 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
322 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
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);
329 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
331 return le16_to_cpu(buf->duration_a);
334 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
335 struct vnt_tx_datahead_a_fb *buf)
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;
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);
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);
351 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
353 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
355 return le16_to_cpu(buf->duration);
358 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
359 struct vnt_tx_datahead_ab *buf)
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;
368 /* Get SignalField,ServiceField,Length */
369 vnt_get_phy_field(priv, frame_len, rate,
370 tx_context->pkt_type, &buf->ab);
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));
378 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
382 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
384 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
386 return le16_to_cpu(buf->duration);
389 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
390 struct ieee80211_rts *rts, __le16 duration)
392 struct ieee80211_hdr *hdr =
393 (struct ieee80211_hdr *)tx_context->skb->data;
395 rts->duration = duration;
397 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
399 ether_addr_copy(rts->ra, hdr->addr1);
400 ether_addr_copy(rts->ta, hdr->addr2);
405 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
406 struct vnt_rts_g *buf)
408 struct vnt_private *priv = tx_context->priv;
409 u16 rts_frame_len = 20;
410 u16 current_rate = tx_context->tx_rate;
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);
417 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
419 priv->top_cck_basic_rate);
420 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
421 tx_context->pkt_type,
423 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
424 tx_context->pkt_type,
427 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
429 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
432 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
433 struct vnt_rts_g_fb *buf)
435 struct vnt_private *priv = tx_context->priv;
436 u16 current_rate = tx_context->tx_rate;
437 u16 rts_frame_len = 20;
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);
444 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
446 priv->top_cck_basic_rate);
447 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
448 tx_context->pkt_type,
450 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
451 tx_context->pkt_type,
454 buf->rts_duration_ba_f0 =
455 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
456 tx_context->pkt_type,
458 buf->rts_duration_aa_f0 =
459 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
460 tx_context->pkt_type,
462 buf->rts_duration_ba_f1 =
463 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
464 tx_context->pkt_type,
466 buf->rts_duration_aa_f1 =
467 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
468 tx_context->pkt_type,
471 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
473 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
476 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
477 struct vnt_rts_ab *buf)
479 struct vnt_private *priv = tx_context->priv;
480 u16 current_rate = tx_context->tx_rate;
481 u16 rts_frame_len = 20;
483 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
484 tx_context->pkt_type, &buf->ab);
486 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
487 tx_context->pkt_type,
490 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
492 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
495 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
496 struct vnt_rts_a_fb *buf)
498 struct vnt_private *priv = tx_context->priv;
499 u16 current_rate = tx_context->tx_rate;
500 u16 rts_frame_len = 20;
502 vnt_get_phy_field(priv, rts_frame_len,
503 priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a);
505 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
506 tx_context->pkt_type,
509 buf->rts_duration_f0 =
510 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
511 tx_context->pkt_type,
514 buf->rts_duration_f1 =
515 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
516 tx_context->pkt_type,
519 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
521 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
524 static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
525 union vnt_tx_data_head *head)
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;
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);
537 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
538 tx_context->pkt_type,
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,
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,
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);
555 ether_addr_copy(buf->data.ra, priv->current_net_addr);
557 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
560 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
561 union vnt_tx_data_head *head)
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;
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 */
573 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
574 tx_context->pkt_type,
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);
581 ether_addr_copy(buf->data.ra, priv->current_net_addr);
583 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
586 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
587 union vnt_tx_head *tx_head, bool need_mic)
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;
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);
603 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
604 frame_len, current_rate,
606 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
607 priv->top_cck_basic_rate, need_ack);
610 head = &tx_head->tx_rts.tx.mic.head;
612 if (tx_context->fb_option)
613 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
615 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
618 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
619 union vnt_tx_head *tx_head, bool need_mic)
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;
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);
633 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
634 tx_context->pkt_type, frame_len, current_rate);
637 head = &tx_head->tx_cts.tx.mic.head;
640 if (tx_context->fb_option)
641 return vnt_fill_cts_fb_head(tx_context, head);
643 return vnt_fill_cts_head(tx_context, head);
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)
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;
656 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
657 frame_len, current_rate, need_ack);
660 head = &tx_head->tx_ab.tx.mic.head;
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);
670 if (tx_context->fb_option &&
671 tx_context->pkt_type == PK_TYPE_11A)
672 return vnt_rxtx_rts_a_fb_head(tx_context,
675 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
678 if (tx_context->pkt_type == PK_TYPE_11A)
679 return vnt_rxtx_datahead_a_fb(tx_context,
680 &head->data_head_a_fb);
682 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
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,
691 if (tx_context->pkt_type == PK_TYPE_11GB ||
692 tx_context->pkt_type == PK_TYPE_11GA) {
695 *mic_hdr = &tx_buffer->
696 tx_head.tx_rts.tx.mic.hdr;
698 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
703 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
705 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
709 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
711 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
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)
718 struct ieee80211_hdr *hdr = tx_context->hdr;
720 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
722 /* strip header and icv len from payload */
723 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
724 payload_len -= tx_key->icv_len;
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);
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);
739 case WLAN_CIPHER_SUITE_TKIP:
740 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
743 case WLAN_CIPHER_SUITE_CCMP:
749 mic_hdr->payload_len = cpu_to_be16(payload_len);
750 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
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;
760 if (ieee80211_has_a4(hdr->frame_control))
761 mic_hdr->hlen = cpu_to_be16(28);
763 mic_hdr->hlen = cpu_to_be16(22);
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);
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);
774 if (ieee80211_has_a4(hdr->frame_control))
775 ether_addr_copy(mic_hdr->addr4, hdr->addr4);
778 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
787 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
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;
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;
804 hdr = (struct ieee80211_hdr *)(skb->data);
806 rate = ieee80211_get_tx_rate(priv->hw, info);
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);
815 if (current_rate > RATE_11M) {
816 if (info->band == IEEE80211_BAND_5GHZ) {
817 pkt_type = PK_TYPE_11A;
819 if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
820 pkt_type = PK_TYPE_11GB;
822 pkt_type = PK_TYPE_11GA;
825 pkt_type = PK_TYPE_11B;
828 spin_lock_irqsave(&priv->lock, flags);
830 tx_context = vnt_get_free_context(priv);
832 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
833 spin_unlock_irqrestore(&priv->lock, flags);
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;
843 spin_unlock_irqrestore(&priv->lock, flags);
845 tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
846 tx_buffer_head = &tx_buffer->fifo_head;
847 tx_body_size = skb->len;
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);
859 if (!ieee80211_is_data(hdr->frame_control)) {
860 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
862 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
864 tx_buffer_head->time_stamp =
865 cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
867 tx_buffer_head->time_stamp =
868 cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
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;
876 if (ieee80211_has_retry(hdr->frame_control))
877 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
879 if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
880 priv->preamble_type = PREAMBLE_SHORT;
882 priv->preamble_type = PREAMBLE_LONG;
884 if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
886 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
889 if (ieee80211_has_a4(hdr->frame_control))
890 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
892 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
895 tx_buffer_head->frag_ctl =
896 cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
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);
905 case WLAN_CIPHER_SUITE_TKIP:
906 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
908 case WLAN_CIPHER_SUITE_CCMP:
909 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
914 tx_context->frame_len += tx_key->icv_len;
917 tx_buffer_head->current_rate = cpu_to_le16(current_rate);
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);
926 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
928 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
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);
936 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
938 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
940 fb_option = AUTO_FB_1;
944 tx_context->fb_option = fb_option;
946 duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
949 tx_header_size = tx_context->tx_hdr_size;
950 if (!tx_header_size) {
951 tx_context->in_use = false;
955 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
957 tx_bytes = tx_header_size + tx_body_size;
959 memcpy(tx_context->hdr, skb->data, tx_body_size);
961 hdr->duration_id = cpu_to_le16(duration_id);
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);
970 priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
971 IEEE80211_SCTL_SEQ) >> 4;
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;
979 tx_context->type = CONTEXT_DATA_PACKET;
980 tx_context->buf_len = tx_bytes;
982 spin_lock_irqsave(&priv->lock, flags);
984 if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
985 spin_unlock_irqrestore(&priv->lock, flags);
989 spin_unlock_irqrestore(&priv->lock, flags);
994 static int vnt_beacon_xmit(struct vnt_private *priv,
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;
1006 spin_lock_irqsave(&priv->lock, flags);
1008 context = vnt_get_free_context(priv);
1010 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
1011 spin_unlock_irqrestore(&priv->lock, flags);
1017 spin_unlock_irqrestore(&priv->lock, flags);
1019 beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1020 short_head = &beacon_buffer->short_head;
1022 if (priv->bb_type == BB_TYPE_11A) {
1023 current_rate = RATE_6M;
1025 /* Get SignalField,ServiceField,Length */
1026 vnt_get_phy_field(priv, frame_size, current_rate,
1027 PK_TYPE_11A, &short_head->ab);
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);
1035 current_rate = RATE_1M;
1036 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1038 /* Get SignalField,ServiceField,Length */
1039 vnt_get_phy_field(priv, frame_size, current_rate,
1040 PK_TYPE_11B, &short_head->ab);
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);
1049 /* Generate Beacon Header */
1050 mgmt_hdr = &beacon_buffer->mgmt_hdr;
1051 memcpy(mgmt_hdr, skb->data, skb->len);
1053 /* time stamp always 0 */
1054 mgmt_hdr->u.beacon.timestamp = 0;
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;
1060 hdr->duration_id = 0;
1061 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1064 priv->seq_counter++;
1065 if (priv->seq_counter > 0x0fff)
1066 priv->seq_counter = 0;
1068 count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1070 beacon_buffer->tx_byte_count = cpu_to_le16(count);
1071 beacon_buffer->pkt_no = context->pkt_no;
1072 beacon_buffer->type = 0x01;
1074 context->type = CONTEXT_BEACON_PACKET;
1075 context->buf_len = count + 4; /* USB header */
1077 spin_lock_irqsave(&priv->lock, flags);
1079 if (vnt_tx_context(priv, context) != STATUS_PENDING)
1080 ieee80211_free_txskb(priv->hw, context->skb);
1082 spin_unlock_irqrestore(&priv->lock, flags);
1087 int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1089 struct sk_buff *beacon;
1091 beacon = ieee80211_beacon_get(priv->hw, vif);
1095 if (vnt_beacon_xmit(priv, beacon)) {
1096 ieee80211_free_txskb(priv->hw, beacon);
1103 int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1104 struct ieee80211_bss_conf *conf)
1106 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1108 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1110 vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1112 vnt_clear_current_tsf(priv);
1114 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1116 vnt_reset_next_tbtt(priv, conf->beacon_int);
1118 return vnt_beacon_make(priv, vif);