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.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 * Purpose: handle WMAC/802.3/802.11 rx & tx functions
28 * vnt_generate_tx_parameter - Generate tx dma required parameter.
29 * vnt_get_duration_le - get tx data required duration
30 * vnt_get_rtscts_duration_le- get rtx/cts required duration
31 * vnt_get_rtscts_rsvtime_le- get rts/cts reserved time
32 * vnt_get_rsvtime- get frame reserved time
33 * vnt_fill_cts_head- fulfill CTS ctl header
46 static const u16 vnt_time_stampoff[2][MAX_RATE] = {
47 {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},/* Long Preamble */
48 {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},/* Short Preamble */
51 static const u16 vnt_fb_opt0[2][5] = {
52 {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */
53 {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */
56 static const u16 vnt_fb_opt1[2][5] = {
57 {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */
58 {RATE_6M , RATE_6M, RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */
65 #define RTSDUR_BA_F0 4
66 #define RTSDUR_AA_F0 5
67 #define RTSDUR_BA_F1 6
68 #define RTSDUR_AA_F1 7
69 #define CTSDUR_BA_F0 8
70 #define CTSDUR_BA_F1 9
73 #define DATADUR_A_F0 12
74 #define DATADUR_A_F1 13
76 static struct vnt_usb_send_context
77 *vnt_get_free_context(struct vnt_private *priv)
79 struct vnt_usb_send_context *context = NULL;
82 dev_dbg(&priv->usb->dev, "%s\n", __func__);
84 for (ii = 0; ii < priv->num_tx_context; ii++) {
85 if (!priv->tx_context[ii])
88 context = priv->tx_context[ii];
89 if (context->in_use == false) {
90 context->in_use = true;
91 memset(context->data, 0,
92 MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
100 if (ii == priv->num_tx_context)
101 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
106 static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
108 return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
112 static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
113 u32 frame_length, u16 rate, int need_ack)
115 u32 data_time, ack_time;
117 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
120 if (pkt_type == PK_TYPE_11B)
121 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
122 14, (u16)priv->top_cck_basic_rate);
124 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
125 14, (u16)priv->top_ofdm_basic_rate);
128 return data_time + priv->sifs + ack_time;
133 static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
134 u32 frame_length, u16 rate, int need_ack)
136 return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
137 frame_length, rate, need_ack));
140 static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv,
141 u8 rsv_type, u8 pkt_type, u32 frame_length, u16 current_rate)
143 u32 rrv_time, rts_time, cts_time, ack_time, data_time;
145 rrv_time = rts_time = cts_time = ack_time = data_time = 0;
147 data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
148 frame_length, current_rate);
151 rts_time = vnt_get_frame_time(priv->preamble_type,
152 pkt_type, 20, priv->top_cck_basic_rate);
153 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
154 pkt_type, 14, priv->top_cck_basic_rate);
155 } else if (rsv_type == 1) {
156 rts_time = vnt_get_frame_time(priv->preamble_type,
157 pkt_type, 20, priv->top_cck_basic_rate);
158 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
159 14, priv->top_cck_basic_rate);
160 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
161 14, priv->top_ofdm_basic_rate);
162 } else if (rsv_type == 2) {
163 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
164 20, priv->top_ofdm_basic_rate);
165 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
166 pkt_type, 14, priv->top_ofdm_basic_rate);
167 } else if (rsv_type == 3) {
168 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
169 14, priv->top_cck_basic_rate);
170 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
171 14, priv->top_ofdm_basic_rate);
173 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
175 return cpu_to_le16((u16)rrv_time);
178 rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
180 return cpu_to_le16((u16)rrv_time);
183 static __le16 vnt_get_duration_le(struct vnt_private *priv,
184 u8 pkt_type, int need_ack)
189 if (pkt_type == PK_TYPE_11B)
190 ack_time = vnt_get_frame_time(priv->preamble_type,
191 pkt_type, 14, priv->top_cck_basic_rate);
193 ack_time = vnt_get_frame_time(priv->preamble_type,
194 pkt_type, 14, priv->top_ofdm_basic_rate);
196 return cpu_to_le16((u16)(priv->sifs + ack_time));
202 static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
203 u8 dur_type, u8 pkt_type, u16 rate)
205 struct vnt_private *priv = context->priv;
206 u32 cts_time = 0, dur_time = 0;
207 u32 frame_length = context->frame_len;
208 u8 need_ack = context->need_ack;
215 cts_time = vnt_get_frame_time(priv->preamble_type,
216 pkt_type, 14, priv->top_cck_basic_rate);
217 dur_time = cts_time + 2 * priv->sifs +
218 vnt_get_rsvtime(priv, pkt_type,
219 frame_length, rate, need_ack);
225 cts_time = vnt_get_frame_time(priv->preamble_type,
226 pkt_type, 14, priv->top_ofdm_basic_rate);
227 dur_time = cts_time + 2 * priv->sifs +
228 vnt_get_rsvtime(priv, pkt_type,
229 frame_length, rate, need_ack);
235 dur_time = priv->sifs + vnt_get_rsvtime(priv,
236 pkt_type, frame_length, rate, need_ack);
243 return cpu_to_le16((u16)dur_time);
246 static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
247 struct ieee80211_hdr *hdr)
249 u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
250 u8 *hdr_pos = (u8 *)hdr;
252 tx_context->hdr = hdr;
253 if (!tx_context->hdr)
256 return (u16)(hdr_pos - head);
259 static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
260 struct vnt_tx_datahead_g *buf)
263 struct vnt_private *priv = tx_context->priv;
264 struct ieee80211_hdr *hdr =
265 (struct ieee80211_hdr *)tx_context->skb->data;
266 u32 frame_len = tx_context->frame_len;
267 u16 rate = tx_context->tx_rate;
268 u8 need_ack = tx_context->need_ack;
270 /* Get SignalField,ServiceField,Length */
271 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
272 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
273 PK_TYPE_11B, &buf->b);
275 /* Get Duration and TimeStamp */
276 if (ieee80211_is_pspoll(hdr->frame_control)) {
277 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
279 buf->duration_a = dur;
280 buf->duration_b = dur;
282 buf->duration_a = vnt_get_duration_le(priv,
283 tx_context->pkt_type, need_ack);
284 buf->duration_b = vnt_get_duration_le(priv,
285 PK_TYPE_11B, need_ack);
288 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
289 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
290 priv->top_cck_basic_rate);
292 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
294 return le16_to_cpu(buf->duration_a);
297 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
298 struct vnt_tx_datahead_g_fb *buf)
300 struct vnt_private *priv = tx_context->priv;
301 u32 frame_len = tx_context->frame_len;
302 u16 rate = tx_context->tx_rate;
303 u8 need_ack = tx_context->need_ack;
305 /* Get SignalField,ServiceField,Length */
306 vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
308 vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
309 PK_TYPE_11B, &buf->b);
311 /* Get Duration and TimeStamp */
312 buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
314 buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
316 buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
318 buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
321 buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
322 buf->time_stamp_off_b = vnt_time_stamp_off(priv,
323 priv->top_cck_basic_rate);
325 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
327 return le16_to_cpu(buf->duration_a);
330 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
331 struct vnt_tx_datahead_a_fb *buf)
333 struct vnt_private *priv = tx_context->priv;
334 u16 rate = tx_context->tx_rate;
335 u8 pkt_type = tx_context->pkt_type;
336 u8 need_ack = tx_context->need_ack;
337 u32 frame_len = tx_context->frame_len;
339 /* Get SignalField,ServiceField,Length */
340 vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
341 /* Get Duration and TimeStampOff */
342 buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
344 buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
345 buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
347 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
349 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
351 return le16_to_cpu(buf->duration);
354 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
355 struct vnt_tx_datahead_ab *buf)
357 struct vnt_private *priv = tx_context->priv;
358 struct ieee80211_hdr *hdr =
359 (struct ieee80211_hdr *)tx_context->skb->data;
360 u32 frame_len = tx_context->frame_len;
361 u16 rate = tx_context->tx_rate;
362 u8 need_ack = tx_context->need_ack;
364 /* Get SignalField,ServiceField,Length */
365 vnt_get_phy_field(priv, frame_len, rate,
366 tx_context->pkt_type, &buf->ab);
368 /* Get Duration and TimeStampOff */
369 if (ieee80211_is_pspoll(hdr->frame_control)) {
370 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
374 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
378 buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
380 tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
382 return le16_to_cpu(buf->duration);
385 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
386 struct ieee80211_rts *rts, __le16 duration)
388 struct ieee80211_hdr *hdr =
389 (struct ieee80211_hdr *)tx_context->skb->data;
391 rts->duration = duration;
393 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
395 memcpy(rts->ra, hdr->addr1, ETH_ALEN);
396 memcpy(rts->ta, hdr->addr2, ETH_ALEN);
401 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
402 struct vnt_rts_g *buf)
404 struct vnt_private *priv = tx_context->priv;
405 u16 rts_frame_len = 20;
406 u16 current_rate = tx_context->tx_rate;
408 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
409 PK_TYPE_11B, &buf->b);
410 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
411 tx_context->pkt_type, &buf->a);
413 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
415 priv->top_cck_basic_rate);
416 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
417 tx_context->pkt_type,
419 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
420 tx_context->pkt_type,
423 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
425 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
428 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
429 struct vnt_rts_g_fb *buf)
431 struct vnt_private *priv = tx_context->priv;
432 u16 current_rate = tx_context->tx_rate;
433 u16 rts_frame_len = 20;
435 vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
436 PK_TYPE_11B, &buf->b);
437 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
438 tx_context->pkt_type, &buf->a);
440 buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
442 priv->top_cck_basic_rate);
443 buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
444 tx_context->pkt_type,
446 buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
447 tx_context->pkt_type,
450 buf->rts_duration_ba_f0 =
451 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
452 tx_context->pkt_type,
454 buf->rts_duration_aa_f0 =
455 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
456 tx_context->pkt_type,
458 buf->rts_duration_ba_f1 =
459 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
460 tx_context->pkt_type,
462 buf->rts_duration_aa_f1 =
463 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
464 tx_context->pkt_type,
467 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
469 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
472 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
473 struct vnt_rts_ab *buf)
475 struct vnt_private *priv = tx_context->priv;
476 u16 current_rate = tx_context->tx_rate;
477 u16 rts_frame_len = 20;
479 vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
480 tx_context->pkt_type, &buf->ab);
482 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
483 tx_context->pkt_type,
486 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
488 return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
491 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
492 struct vnt_rts_a_fb *buf)
494 struct vnt_private *priv = tx_context->priv;
495 u16 current_rate = tx_context->tx_rate;
496 u16 rts_frame_len = 20;
498 vnt_get_phy_field(priv, rts_frame_len,
499 priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a);
501 buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
502 tx_context->pkt_type,
505 buf->rts_duration_f0 =
506 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
507 tx_context->pkt_type,
510 buf->rts_duration_f1 =
511 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
512 tx_context->pkt_type,
515 vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
517 return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
520 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
521 union vnt_tx_data_head *head)
523 struct vnt_private *priv = tx_context->priv;
524 u32 cts_frame_len = 14;
525 u16 current_rate = tx_context->tx_rate;
530 if (tx_context->fb_option) {
532 struct vnt_cts_fb *buf = &head->cts_g_fb;
533 /* Get SignalField,ServiceField,Length */
534 vnt_get_phy_field(priv, cts_frame_len,
535 priv->top_cck_basic_rate, PK_TYPE_11B, &buf->b);
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 memcpy(buf->data.ra, priv->current_net_addr, ETH_ALEN);
557 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
559 struct vnt_cts *buf = &head->cts_g;
560 /* Get SignalField,ServiceField,Length */
561 vnt_get_phy_field(priv, cts_frame_len,
562 priv->top_cck_basic_rate, PK_TYPE_11B, &buf->b);
563 /* Get CTSDuration_ba */
565 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
566 tx_context->pkt_type,
568 /*Get CTS Frame body*/
569 buf->data.duration = buf->duration_ba;
570 buf->data.frame_control =
571 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
573 memcpy(buf->data.ra, priv->current_net_addr, ETH_ALEN);
575 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
581 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
582 union vnt_tx_head *tx_head, bool need_mic)
584 struct vnt_private *priv = tx_context->priv;
585 struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
586 union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
587 u32 frame_len = tx_context->frame_len;
588 u16 current_rate = tx_context->tx_rate;
589 u8 need_ack = tx_context->need_ack;
591 buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
592 tx_context->pkt_type, frame_len, current_rate);
593 buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
594 tx_context->pkt_type, frame_len, current_rate);
595 buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
596 tx_context->pkt_type, frame_len, current_rate);
598 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
599 frame_len, current_rate,
601 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
602 priv->top_cck_basic_rate, need_ack);
605 head = &tx_head->tx_rts.tx.mic.head;
607 if (tx_context->fb_option)
608 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
610 return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
613 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
614 union vnt_tx_head *tx_head, bool need_mic)
616 struct vnt_private *priv = tx_context->priv;
617 struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
618 union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
619 u32 frame_len = tx_context->frame_len;
620 u16 current_rate = tx_context->tx_rate;
621 u8 need_ack = tx_context->need_ack;
623 buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
624 frame_len, current_rate, need_ack);
625 buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
626 frame_len, priv->top_cck_basic_rate, need_ack);
628 buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
629 tx_context->pkt_type, frame_len, current_rate);
632 head = &tx_head->tx_cts.tx.mic.head;
635 return vnt_fill_cts_head(tx_context, head);
638 static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
639 union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
641 struct vnt_private *priv = tx_context->priv;
642 struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
643 union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
644 u32 frame_len = tx_context->frame_len;
645 u16 current_rate = tx_context->tx_rate;
646 u8 need_ack = tx_context->need_ack;
648 buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
649 frame_len, current_rate, need_ack);
652 head = &tx_head->tx_ab.tx.mic.head;
655 if (tx_context->pkt_type == PK_TYPE_11B)
656 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
657 tx_context->pkt_type, frame_len, current_rate);
658 else /* PK_TYPE_11A */
659 buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
660 tx_context->pkt_type, frame_len, current_rate);
662 if (tx_context->fb_option &&
663 tx_context->pkt_type == PK_TYPE_11A)
664 return vnt_rxtx_rts_a_fb_head(tx_context,
667 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
670 if (tx_context->pkt_type == PK_TYPE_11A)
671 return vnt_rxtx_datahead_a_fb(tx_context,
672 &head->data_head_a_fb);
674 return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
677 static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
678 struct vnt_tx_buffer *tx_buffer,
679 struct vnt_mic_hdr **mic_hdr, u32 need_mic,
683 if (tx_context->pkt_type == PK_TYPE_11GB ||
684 tx_context->pkt_type == PK_TYPE_11GA) {
687 *mic_hdr = &tx_buffer->
688 tx_head.tx_rts.tx.mic.hdr;
690 return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
695 *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
697 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
701 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
703 return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
706 static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
707 u8 *key_buffer, struct ieee80211_key_conf *tx_key, struct sk_buff *skb,
708 u16 payload_len, struct vnt_mic_hdr *mic_hdr)
710 struct ieee80211_hdr *hdr = tx_context->hdr;
711 struct ieee80211_key_seq seq;
712 u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
714 /* strip header and icv len from payload */
715 payload_len -= ieee80211_get_hdrlen_from_skb(skb);
716 payload_len -= tx_key->icv_len;
718 switch (tx_key->cipher) {
719 case WLAN_CIPHER_SUITE_WEP40:
720 case WLAN_CIPHER_SUITE_WEP104:
721 memcpy(key_buffer, iv, 3);
722 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
724 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
725 memcpy(key_buffer + 8, iv, 3);
726 memcpy(key_buffer + 11,
727 tx_key->key, WLAN_KEY_LEN_WEP40);
731 case WLAN_CIPHER_SUITE_TKIP:
732 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
735 case WLAN_CIPHER_SUITE_CCMP:
741 mic_hdr->payload_len = cpu_to_be16(payload_len);
742 memcpy(mic_hdr->mic_addr2, hdr->addr2, ETH_ALEN);
744 ieee80211_get_key_tx_seq(tx_key, &seq);
746 memcpy(mic_hdr->ccmp_pn, seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
748 if (ieee80211_has_a4(hdr->frame_control))
749 mic_hdr->hlen = cpu_to_be16(28);
751 mic_hdr->hlen = cpu_to_be16(22);
753 memcpy(mic_hdr->addr1, hdr->addr1, ETH_ALEN);
754 memcpy(mic_hdr->addr2, hdr->addr2, ETH_ALEN);
755 memcpy(mic_hdr->addr3, hdr->addr3, ETH_ALEN);
757 mic_hdr->frame_control = cpu_to_le16(
758 le16_to_cpu(hdr->frame_control) & 0xc78f);
759 mic_hdr->seq_ctrl = cpu_to_le16(
760 le16_to_cpu(hdr->seq_ctrl) & 0xf);
762 if (ieee80211_has_a4(hdr->frame_control))
763 memcpy(mic_hdr->addr4, hdr->addr4, ETH_ALEN);
766 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
775 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
777 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
778 struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
779 struct ieee80211_rate *rate;
780 struct ieee80211_key_conf *tx_key;
781 struct ieee80211_hdr *hdr;
782 struct vnt_mic_hdr *mic_hdr = NULL;
783 struct vnt_tx_buffer *tx_buffer;
784 struct vnt_tx_fifo_head *tx_buffer_head;
785 struct vnt_usb_send_context *tx_context;
787 u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
788 u8 pkt_type, fb_option = AUTO_FB_NONE;
789 bool need_rts = false, is_pspoll = false;
790 bool need_mic = false;
792 hdr = (struct ieee80211_hdr *)(skb->data);
794 rate = ieee80211_get_tx_rate(priv->hw, info);
796 current_rate = rate->hw_value;
797 if (priv->current_rate != current_rate &&
798 !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
799 priv->current_rate = current_rate;
800 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
803 if (current_rate > RATE_11M)
804 pkt_type = priv->packet_type;
806 pkt_type = PK_TYPE_11B;
808 spin_lock_irqsave(&priv->lock, flags);
810 tx_context = vnt_get_free_context(priv);
812 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
813 spin_unlock_irqrestore(&priv->lock, flags);
817 tx_context->skb = skb;
818 tx_context->pkt_type = pkt_type;
819 tx_context->need_ack = false;
820 tx_context->frame_len = skb->len + 4;
821 tx_context->tx_rate = current_rate;
823 spin_unlock_irqrestore(&priv->lock, flags);
825 tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
826 tx_buffer_head = &tx_buffer->fifo_head;
827 tx_body_size = skb->len;
829 /*Set fifo controls */
830 if (pkt_type == PK_TYPE_11A)
831 tx_buffer_head->fifo_ctl = 0;
832 else if (pkt_type == PK_TYPE_11B)
833 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
834 else if (pkt_type == PK_TYPE_11GB)
835 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
836 else if (pkt_type == PK_TYPE_11GA)
837 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
839 if (!ieee80211_is_data(hdr->frame_control)) {
840 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
842 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
844 tx_buffer_head->time_stamp =
845 cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
847 tx_buffer_head->time_stamp =
848 cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
851 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
852 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
853 tx_context->need_ack = true;
856 if (ieee80211_has_retry(hdr->frame_control))
857 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
859 if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
860 priv->preamble_type = PREAMBLE_SHORT;
862 priv->preamble_type = PREAMBLE_LONG;
864 if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
866 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
869 if (ieee80211_has_a4(hdr->frame_control))
870 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
872 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
875 tx_buffer_head->frag_ctl =
876 cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
878 if (info->control.hw_key) {
879 tx_key = info->control.hw_key;
880 switch (info->control.hw_key->cipher) {
881 case WLAN_CIPHER_SUITE_WEP40:
882 case WLAN_CIPHER_SUITE_WEP104:
883 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
885 case WLAN_CIPHER_SUITE_TKIP:
886 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
888 case WLAN_CIPHER_SUITE_CCMP:
889 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
894 tx_context->frame_len += tx_key->icv_len;
897 tx_buffer_head->current_rate = cpu_to_le16(current_rate);
899 /* legacy rates TODO use ieee80211_tx_rate */
900 if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
901 if (priv->auto_fb_ctrl == AUTO_FB_0) {
902 tx_buffer_head->fifo_ctl |=
903 cpu_to_le16(FIFOCTL_AUTO_FB_0);
906 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
908 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
910 fb_option = AUTO_FB_0;
911 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
912 tx_buffer_head->fifo_ctl |=
913 cpu_to_le16(FIFOCTL_AUTO_FB_1);
916 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
918 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
920 fb_option = AUTO_FB_1;
924 tx_context->fb_option = fb_option;
926 duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
929 tx_header_size = tx_context->tx_hdr_size;
930 if (!tx_header_size) {
931 tx_context->in_use = false;
935 tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
937 tx_bytes = tx_header_size + tx_body_size;
939 memcpy(tx_context->hdr, skb->data, tx_body_size);
941 hdr->duration_id = cpu_to_le16(duration_id);
943 if (info->control.hw_key) {
944 tx_key = info->control.hw_key;
945 if (tx_key->keylen > 0)
946 vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
947 tx_key, skb, tx_body_size, mic_hdr);
950 priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
951 IEEE80211_SCTL_SEQ) >> 4;
953 tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
954 tx_buffer->pkt_no = tx_context->pkt_no;
955 tx_buffer->type = 0x00;
959 tx_context->type = CONTEXT_DATA_PACKET;
960 tx_context->buf_len = tx_bytes;
962 spin_lock_irqsave(&priv->lock, flags);
964 if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
965 spin_unlock_irqrestore(&priv->lock, flags);
969 spin_unlock_irqrestore(&priv->lock, flags);
974 static int vnt_beacon_xmit(struct vnt_private *priv,
977 struct vnt_beacon_buffer *beacon_buffer;
978 struct vnt_tx_short_buf_head *short_head;
979 struct ieee80211_tx_info *info;
980 struct vnt_usb_send_context *context;
981 struct ieee80211_mgmt *mgmt_hdr;
983 u32 frame_size = skb->len + 4;
984 u16 current_rate, count;
986 spin_lock_irqsave(&priv->lock, flags);
988 context = vnt_get_free_context(priv);
990 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
991 spin_unlock_irqrestore(&priv->lock, flags);
997 spin_unlock_irqrestore(&priv->lock, flags);
999 beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1000 short_head = &beacon_buffer->short_head;
1002 if (priv->bb_type == BB_TYPE_11A) {
1003 current_rate = RATE_6M;
1005 /* Get SignalField,ServiceField,Length */
1006 vnt_get_phy_field(priv, frame_size, current_rate,
1007 PK_TYPE_11A, &short_head->ab);
1009 /* Get Duration and TimeStampOff */
1010 short_head->duration = vnt_get_duration_le(priv,
1011 PK_TYPE_11A, false);
1012 short_head->time_stamp_off =
1013 vnt_time_stamp_off(priv, current_rate);
1015 current_rate = RATE_1M;
1016 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1018 /* Get SignalField,ServiceField,Length */
1019 vnt_get_phy_field(priv, frame_size, current_rate,
1020 PK_TYPE_11B, &short_head->ab);
1022 /* Get Duration and TimeStampOff */
1023 short_head->duration = vnt_get_duration_le(priv,
1024 PK_TYPE_11B, false);
1025 short_head->time_stamp_off =
1026 vnt_time_stamp_off(priv, current_rate);
1029 /* Generate Beacon Header */
1030 mgmt_hdr = &beacon_buffer->mgmt_hdr;
1031 memcpy(mgmt_hdr, skb->data, skb->len);
1033 /* time stamp always 0 */
1034 mgmt_hdr->u.beacon.timestamp = 0;
1036 info = IEEE80211_SKB_CB(skb);
1037 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1038 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1040 hdr->duration_id = 0;
1041 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1044 priv->seq_counter++;
1045 if (priv->seq_counter > 0x0fff)
1046 priv->seq_counter = 0;
1048 count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1050 beacon_buffer->tx_byte_count = cpu_to_le16(count);
1051 beacon_buffer->pkt_no = context->pkt_no;
1052 beacon_buffer->type = 0x01;
1054 context->type = CONTEXT_BEACON_PACKET;
1055 context->buf_len = count + 4; /* USB header */
1057 spin_lock_irqsave(&priv->lock, flags);
1059 if (vnt_tx_context(priv, context) != STATUS_PENDING)
1060 ieee80211_free_txskb(priv->hw, context->skb);
1062 spin_unlock_irqrestore(&priv->lock, flags);
1067 int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1069 struct sk_buff *beacon;
1071 beacon = ieee80211_beacon_get(priv->hw, vif);
1075 if (vnt_beacon_xmit(priv, beacon)) {
1076 ieee80211_free_txskb(priv->hw, beacon);
1083 int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1084 struct ieee80211_bss_conf *conf)
1086 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1088 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1090 vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1092 vnt_clear_current_tsf(priv);
1094 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1096 vnt_reset_next_tbtt(priv, conf->beacon_int);
1098 return vnt_beacon_make(priv, vif);