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ath6kl: Make net and target stats vif specific
[linux-2.6.git] / drivers / net / wireless / ath / ath6kl / txrx.c
blobcada1977f4309769ea9e413de72becda1eb21ed0
1 /*
2 * Copyright (c) 2004-2011 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include "core.h"
18 #include "debug.h"
19
20 static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev,
21 u32 *map_no)
22 {
23 struct ath6kl *ar = ath6kl_priv(dev);
24 struct ethhdr *eth_hdr;
25 u32 i, ep_map = -1;
26 u8 *datap;
27
28 *map_no = 0;
29 datap = skb->data;
30 eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr));
31
32 if (is_multicast_ether_addr(eth_hdr->h_dest))
33 return ENDPOINT_2;
34
35 for (i = 0; i < ar->node_num; i++) {
36 if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr,
37 ETH_ALEN) == 0) {
38 *map_no = i + 1;
39 ar->node_map[i].tx_pend++;
40 return ar->node_map[i].ep_id;
41 }
42
43 if ((ep_map == -1) && !ar->node_map[i].tx_pend)
44 ep_map = i;
45 }
46
47 if (ep_map == -1) {
48 ep_map = ar->node_num;
49 ar->node_num++;
50 if (ar->node_num > MAX_NODE_NUM)
51 return ENDPOINT_UNUSED;
52 }
53
54 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN);
55
56 for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) {
57 if (!ar->tx_pending[i]) {
58 ar->node_map[ep_map].ep_id = i;
59 break;
60 }
61
62 /*
63 * No free endpoint is available, start redistribution on
64 * the inuse endpoints.
65 */
66 if (i == ENDPOINT_5) {
67 ar->node_map[ep_map].ep_id = ar->next_ep_id;
68 ar->next_ep_id++;
69 if (ar->next_ep_id > ENDPOINT_5)
70 ar->next_ep_id = ENDPOINT_2;
71 }
72 }
73
74 *map_no = ep_map + 1;
75 ar->node_map[ep_map].tx_pend++;
76
77 return ar->node_map[ep_map].ep_id;
78 }
79
80 static bool ath6kl_powersave_ap(struct ath6kl *ar, struct sk_buff *skb,
81 bool *more_data)
82 {
83 struct ethhdr *datap = (struct ethhdr *) skb->data;
84 struct ath6kl_sta *conn = NULL;
85 bool ps_queued = false, is_psq_empty = false;
86 /* TODO: Findout vif */
87 struct ath6kl_vif *vif = ar->vif;
88
89 if (is_multicast_ether_addr(datap->h_dest)) {
90 u8 ctr = 0;
91 bool q_mcast = false;
92
93 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
94 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) {
95 q_mcast = true;
96 break;
97 }
98 }
99
100 if (q_mcast) {
101 /*
102 * If this transmit is not because of a Dtim Expiry
103 * q it.
104 */
105 if (!test_bit(DTIM_EXPIRED, &vif->flags)) {
106 bool is_mcastq_empty = false;
107
108 spin_lock_bh(&ar->mcastpsq_lock);
109 is_mcastq_empty =
110 skb_queue_empty(&ar->mcastpsq);
111 skb_queue_tail(&ar->mcastpsq, skb);
112 spin_unlock_bh(&ar->mcastpsq_lock);
113
114 /*
115 * If this is the first Mcast pkt getting
116 * queued indicate to the target to set the
117 * BitmapControl LSB of the TIM IE.
118 */
119 if (is_mcastq_empty)
120 ath6kl_wmi_set_pvb_cmd(ar->wmi,
121 MCAST_AID, 1);
122
123 ps_queued = true;
124 } else {
125 /*
126 * This transmit is because of Dtim expiry.
127 * Determine if MoreData bit has to be set.
128 */
129 spin_lock_bh(&ar->mcastpsq_lock);
130 if (!skb_queue_empty(&ar->mcastpsq))
131 *more_data = true;
132 spin_unlock_bh(&ar->mcastpsq_lock);
133 }
134 }
135 } else {
136 conn = ath6kl_find_sta(ar, datap->h_dest);
137 if (!conn) {
138 dev_kfree_skb(skb);
139
140 /* Inform the caller that the skb is consumed */
141 return true;
142 }
143
144 if (conn->sta_flags & STA_PS_SLEEP) {
145 if (!(conn->sta_flags & STA_PS_POLLED)) {
146 /* Queue the frames if the STA is sleeping */
147 spin_lock_bh(&conn->psq_lock);
148 is_psq_empty = skb_queue_empty(&conn->psq);
149 skb_queue_tail(&conn->psq, skb);
150 spin_unlock_bh(&conn->psq_lock);
151
152 /*
153 * If this is the first pkt getting queued
154 * for this STA, update the PVB for this
155 * STA.
156 */
157 if (is_psq_empty)
158 ath6kl_wmi_set_pvb_cmd(ar->wmi,
159 conn->aid, 1);
160
161 ps_queued = true;
162 } else {
163 /*
164 * This tx is because of a PsPoll.
165 * Determine if MoreData bit has to be set.
166 */
167 spin_lock_bh(&conn->psq_lock);
168 if (!skb_queue_empty(&conn->psq))
169 *more_data = true;
170 spin_unlock_bh(&conn->psq_lock);
171 }
172 }
173 }
174
175 return ps_queued;
176 }
177
178 /* Tx functions */
179
180 int ath6kl_control_tx(void *devt, struct sk_buff *skb,
181 enum htc_endpoint_id eid)
182 {
183 struct ath6kl *ar = devt;
184 int status = 0;
185 struct ath6kl_cookie *cookie = NULL;
186
187 spin_lock_bh(&ar->lock);
188
189 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
190 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__,
191 skb, skb->len, eid);
192
193 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) {
194 /*
195 * Control endpoint is full, don't allocate resources, we
196 * are just going to drop this packet.
197 */
198 cookie = NULL;
199 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n",
200 skb, skb->len);
201 } else
202 cookie = ath6kl_alloc_cookie(ar);
203
204 if (cookie == NULL) {
205 spin_unlock_bh(&ar->lock);
206 status = -ENOMEM;
207 goto fail_ctrl_tx;
208 }
209
210 ar->tx_pending[eid]++;
211
212 if (eid != ar->ctrl_ep)
213 ar->total_tx_data_pend++;
214
215 spin_unlock_bh(&ar->lock);
216
217 cookie->skb = skb;
218 cookie->map_no = 0;
219 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
220 eid, ATH6KL_CONTROL_PKT_TAG);
221
222 /*
223 * This interface is asynchronous, if there is an error, cleanup
224 * will happen in the TX completion callback.
225 */
226 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
227
228 return 0;
229
230 fail_ctrl_tx:
231 dev_kfree_skb(skb);
232 return status;
233 }
234
235 int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev)
236 {
237 struct ath6kl *ar = ath6kl_priv(dev);
238 struct ath6kl_cookie *cookie = NULL;
239 enum htc_endpoint_id eid = ENDPOINT_UNUSED;
240 struct ath6kl_vif *vif = netdev_priv(dev);
241 u32 map_no = 0;
242 u16 htc_tag = ATH6KL_DATA_PKT_TAG;
243 u8 ac = 99 ; /* initialize to unmapped ac */
244 bool chk_adhoc_ps_mapping = false, more_data = false;
245 int ret;
246
247 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
248 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__,
249 skb, skb->data, skb->len);
250
251 /* If target is not associated */
252 if (!test_bit(CONNECTED, &vif->flags)) {
253 dev_kfree_skb(skb);
254 return 0;
255 }
256
257 if (!test_bit(WMI_READY, &ar->flag))
258 goto fail_tx;
259
260 /* AP mode Power saving processing */
261 if (vif->nw_type == AP_NETWORK) {
262 if (ath6kl_powersave_ap(ar, skb, &more_data))
263 return 0;
264 }
265
266 if (test_bit(WMI_ENABLED, &ar->flag)) {
267 if (skb_headroom(skb) < dev->needed_headroom) {
268 WARN_ON(1);
269 goto fail_tx;
270 }
271
272 if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) {
273 ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n");
274 goto fail_tx;
275 }
276
277 if (ath6kl_wmi_data_hdr_add(ar->wmi, skb, DATA_MSGTYPE,
278 more_data, 0, 0, NULL)) {
279 ath6kl_err("wmi_data_hdr_add failed\n");
280 goto fail_tx;
281 }
282
283 if ((vif->nw_type == ADHOC_NETWORK) &&
284 ar->ibss_ps_enable && test_bit(CONNECTED, &vif->flags))
285 chk_adhoc_ps_mapping = true;
286 else {
287 /* get the stream mapping */
288 ret = ath6kl_wmi_implicit_create_pstream(ar->wmi, skb,
289 0, test_bit(WMM_ENABLED, &vif->flags), &ac);
290 if (ret)
291 goto fail_tx;
292 }
293 } else
294 goto fail_tx;
295
296 spin_lock_bh(&ar->lock);
297
298 if (chk_adhoc_ps_mapping)
299 eid = ath6kl_ibss_map_epid(skb, dev, &map_no);
300 else
301 eid = ar->ac2ep_map[ac];
302
303 if (eid == 0 || eid == ENDPOINT_UNUSED) {
304 ath6kl_err("eid %d is not mapped!\n", eid);
305 spin_unlock_bh(&ar->lock);
306 goto fail_tx;
307 }
308
309 /* allocate resource for this packet */
310 cookie = ath6kl_alloc_cookie(ar);
311
312 if (!cookie) {
313 spin_unlock_bh(&ar->lock);
314 goto fail_tx;
315 }
316
317 /* update counts while the lock is held */
318 ar->tx_pending[eid]++;
319 ar->total_tx_data_pend++;
320
321 spin_unlock_bh(&ar->lock);
322
323 if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) &&
324 skb_cloned(skb)) {
325 /*
326 * We will touch (move the buffer data to align it. Since the
327 * skb buffer is cloned and not only the header is changed, we
328 * have to copy it to allow the changes. Since we are copying
329 * the data here, we may as well align it by reserving suitable
330 * headroom to avoid the memmove in ath6kl_htc_tx_buf_align().
331 */
332 struct sk_buff *nskb;
333
334 nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC);
335 if (nskb == NULL)
336 goto fail_tx;
337 kfree_skb(skb);
338 skb = nskb;
339 }
340
341 cookie->skb = skb;
342 cookie->map_no = map_no;
343 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
344 eid, htc_tag);
345
346 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ",
347 skb->data, skb->len);
348
349 /*
350 * HTC interface is asynchronous, if this fails, cleanup will
351 * happen in the ath6kl_tx_complete callback.
352 */
353 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
354
355 return 0;
356
357 fail_tx:
358 dev_kfree_skb(skb);
359
360 vif->net_stats.tx_dropped++;
361 vif->net_stats.tx_aborted_errors++;
362
363 return 0;
364 }
365
366 /* indicate tx activity or inactivity on a WMI stream */
367 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active)
368 {
369 struct ath6kl *ar = devt;
370 enum htc_endpoint_id eid;
371 int i;
372
373 eid = ar->ac2ep_map[traffic_class];
374
375 if (!test_bit(WMI_ENABLED, &ar->flag))
376 goto notify_htc;
377
378 spin_lock_bh(&ar->lock);
379
380 ar->ac_stream_active[traffic_class] = active;
381
382 if (active) {
383 /*
384 * Keep track of the active stream with the highest
385 * priority.
386 */
387 if (ar->ac_stream_pri_map[traffic_class] >
388 ar->hiac_stream_active_pri)
389 /* set the new highest active priority */
390 ar->hiac_stream_active_pri =
391 ar->ac_stream_pri_map[traffic_class];
392
393 } else {
394 /*
395 * We may have to search for the next active stream
396 * that is the highest priority.
397 */
398 if (ar->hiac_stream_active_pri ==
399 ar->ac_stream_pri_map[traffic_class]) {
400 /*
401 * The highest priority stream just went inactive
402 * reset and search for the "next" highest "active"
403 * priority stream.
404 */
405 ar->hiac_stream_active_pri = 0;
406
407 for (i = 0; i < WMM_NUM_AC; i++) {
408 if (ar->ac_stream_active[i] &&
409 (ar->ac_stream_pri_map[i] >
410 ar->hiac_stream_active_pri))
411 /*
412 * Set the new highest active
413 * priority.
414 */
415 ar->hiac_stream_active_pri =
416 ar->ac_stream_pri_map[i];
417 }
418 }
419 }
420
421 spin_unlock_bh(&ar->lock);
422
423 notify_htc:
424 /* notify HTC, this may cause credit distribution changes */
425 ath6kl_htc_indicate_activity_change(ar->htc_target, eid, active);
426 }
427
428 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target,
429 struct htc_packet *packet)
430 {
431 struct ath6kl *ar = target->dev->ar;
432 /* TODO: Findout vif properly */
433 struct ath6kl_vif *vif = ar->vif;
434 enum htc_endpoint_id endpoint = packet->endpoint;
435
436 if (endpoint == ar->ctrl_ep) {
437 /*
438 * Under normal WMI if this is getting full, then something
439 * is running rampant the host should not be exhausting the
440 * WMI queue with too many commands the only exception to
441 * this is during testing using endpointping.
442 */
443 spin_lock_bh(&ar->lock);
444 set_bit(WMI_CTRL_EP_FULL, &ar->flag);
445 spin_unlock_bh(&ar->lock);
446 ath6kl_err("wmi ctrl ep is full\n");
447 return HTC_SEND_FULL_KEEP;
448 }
449
450 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG)
451 return HTC_SEND_FULL_KEEP;
452
453 if (vif->nw_type == ADHOC_NETWORK)
454 /*
455 * In adhoc mode, we cannot differentiate traffic
456 * priorities so there is no need to continue, however we
457 * should stop the network.
458 */
459 goto stop_net_queues;
460
461 /*
462 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for
463 * the highest active stream.
464 */
465 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] <
466 ar->hiac_stream_active_pri &&
467 ar->cookie_count <= MAX_HI_COOKIE_NUM)
468 /*
469 * Give preference to the highest priority stream by
470 * dropping the packets which overflowed.
471 */
472 return HTC_SEND_FULL_DROP;
473
474 stop_net_queues:
475 spin_lock_bh(&ar->lock);
476 set_bit(NETQ_STOPPED, &vif->flags);
477 spin_unlock_bh(&ar->lock);
478 netif_stop_queue(ar->net_dev);
479
480 return HTC_SEND_FULL_KEEP;
481 }
482
483 /* TODO this needs to be looked at */
484 static void ath6kl_tx_clear_node_map(struct ath6kl *ar,
485 enum htc_endpoint_id eid, u32 map_no)
486 {
487 /* TODO: Findout vif */
488 struct ath6kl_vif *vif = ar->vif;
489 u32 i;
490
491 if (vif->nw_type != ADHOC_NETWORK)
492 return;
493
494 if (!ar->ibss_ps_enable)
495 return;
496
497 if (eid == ar->ctrl_ep)
498 return;
499
500 if (map_no == 0)
501 return;
502
503 map_no--;
504 ar->node_map[map_no].tx_pend--;
505
506 if (ar->node_map[map_no].tx_pend)
507 return;
508
509 if (map_no != (ar->node_num - 1))
510 return;
511
512 for (i = ar->node_num; i > 0; i--) {
513 if (ar->node_map[i - 1].tx_pend)
514 break;
515
516 memset(&ar->node_map[i - 1], 0,
517 sizeof(struct ath6kl_node_mapping));
518 ar->node_num--;
519 }
520 }
521
522 void ath6kl_tx_complete(void *context, struct list_head *packet_queue)
523 {
524 struct ath6kl *ar = context;
525 struct sk_buff_head skb_queue;
526 struct htc_packet *packet;
527 struct sk_buff *skb;
528 struct ath6kl_cookie *ath6kl_cookie;
529 u32 map_no = 0;
530 int status;
531 enum htc_endpoint_id eid;
532 bool wake_event = false;
533 bool flushing = false;
534 /* TODO: Findout vif */
535 struct ath6kl_vif *vif = ar->vif;
536
537 skb_queue_head_init(&skb_queue);
538
539 /* lock the driver as we update internal state */
540 spin_lock_bh(&ar->lock);
541
542 /* reap completed packets */
543 while (!list_empty(packet_queue)) {
544
545 packet = list_first_entry(packet_queue, struct htc_packet,
546 list);
547 list_del(&packet->list);
548
549 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt;
550 if (!ath6kl_cookie)
551 goto fatal;
552
553 status = packet->status;
554 skb = ath6kl_cookie->skb;
555 eid = packet->endpoint;
556 map_no = ath6kl_cookie->map_no;
557
558 if (!skb || !skb->data)
559 goto fatal;
560
561 packet->buf = skb->data;
562
563 __skb_queue_tail(&skb_queue, skb);
564
565 if (!status && (packet->act_len != skb->len))
566 goto fatal;
567
568 ar->tx_pending[eid]--;
569
570 if (eid != ar->ctrl_ep)
571 ar->total_tx_data_pend--;
572
573 if (eid == ar->ctrl_ep) {
574 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag))
575 clear_bit(WMI_CTRL_EP_FULL, &ar->flag);
576
577 if (ar->tx_pending[eid] == 0)
578 wake_event = true;
579 }
580
581 if (status) {
582 if (status == -ECANCELED)
583 /* a packet was flushed */
584 flushing = true;
585
586 vif->net_stats.tx_errors++;
587
588 if (status != -ENOSPC)
589 ath6kl_err("tx error, status: 0x%x\n", status);
590 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
591 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
592 __func__, skb, packet->buf, packet->act_len,
593 eid, "error!");
594 } else {
595 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
596 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
597 __func__, skb, packet->buf, packet->act_len,
598 eid, "OK");
599
600 flushing = false;
601 vif->net_stats.tx_packets++;
602 vif->net_stats.tx_bytes += skb->len;
603 }
604
605 ath6kl_tx_clear_node_map(ar, eid, map_no);
606
607 ath6kl_free_cookie(ar, ath6kl_cookie);
608
609 if (test_bit(NETQ_STOPPED, &vif->flags))
610 clear_bit(NETQ_STOPPED, &vif->flags);
611 }
612
613 spin_unlock_bh(&ar->lock);
614
615 __skb_queue_purge(&skb_queue);
616
617 if (test_bit(CONNECTED, &vif->flags)) {
618 if (!flushing)
619 netif_wake_queue(ar->net_dev);
620 }
621
622 if (wake_event)
623 wake_up(&ar->event_wq);
624
625 return;
626
627 fatal:
628 WARN_ON(1);
629 spin_unlock_bh(&ar->lock);
630 return;
631 }
632
633 void ath6kl_tx_data_cleanup(struct ath6kl *ar)
634 {
635 int i;
636
637 /* flush all the data (non-control) streams */
638 for (i = 0; i < WMM_NUM_AC; i++)
639 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i],
640 ATH6KL_DATA_PKT_TAG);
641 }
642
643 /* Rx functions */
644
645 static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev,
646 struct sk_buff *skb)
647 {
648 if (!skb)
649 return;
650
651 skb->dev = dev;
652
653 if (!(skb->dev->flags & IFF_UP)) {
654 dev_kfree_skb(skb);
655 return;
656 }
657
658 skb->protocol = eth_type_trans(skb, skb->dev);
659
660 netif_rx_ni(skb);
661 }
662
663 static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num)
664 {
665 struct sk_buff *skb;
666
667 while (num) {
668 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
669 if (!skb) {
670 ath6kl_err("netbuf allocation failed\n");
671 return;
672 }
673 skb_queue_tail(q, skb);
674 num--;
675 }
676 }
677
678 static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr)
679 {
680 struct sk_buff *skb = NULL;
681
682 if (skb_queue_len(&p_aggr->free_q) < (AGGR_NUM_OF_FREE_NETBUFS >> 2))
683 ath6kl_alloc_netbufs(&p_aggr->free_q, AGGR_NUM_OF_FREE_NETBUFS);
684
685 skb = skb_dequeue(&p_aggr->free_q);
686
687 return skb;
688 }
689
690 void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint)
691 {
692 struct ath6kl *ar = target->dev->ar;
693 struct sk_buff *skb;
694 int rx_buf;
695 int n_buf_refill;
696 struct htc_packet *packet;
697 struct list_head queue;
698
699 n_buf_refill = ATH6KL_MAX_RX_BUFFERS -
700 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint);
701
702 if (n_buf_refill <= 0)
703 return;
704
705 INIT_LIST_HEAD(&queue);
706
707 ath6kl_dbg(ATH6KL_DBG_WLAN_RX,
708 "%s: providing htc with %d buffers at eid=%d\n",
709 __func__, n_buf_refill, endpoint);
710
711 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) {
712 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
713 if (!skb)
714 break;
715
716 packet = (struct htc_packet *) skb->head;
717 if (!IS_ALIGNED((unsigned long) skb->data, 4))
718 skb->data = PTR_ALIGN(skb->data - 4, 4);
719 set_htc_rxpkt_info(packet, skb, skb->data,
720 ATH6KL_BUFFER_SIZE, endpoint);
721 list_add_tail(&packet->list, &queue);
722 }
723
724 if (!list_empty(&queue))
725 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue);
726 }
727
728 void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count)
729 {
730 struct htc_packet *packet;
731 struct sk_buff *skb;
732
733 while (count) {
734 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE);
735 if (!skb)
736 return;
737
738 packet = (struct htc_packet *) skb->head;
739 if (!IS_ALIGNED((unsigned long) skb->data, 4))
740 skb->data = PTR_ALIGN(skb->data - 4, 4);
741 set_htc_rxpkt_info(packet, skb, skb->data,
742 ATH6KL_AMSDU_BUFFER_SIZE, 0);
743 spin_lock_bh(&ar->lock);
744 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue);
745 spin_unlock_bh(&ar->lock);
746 count--;
747 }
748 }
749
750 /*
751 * Callback to allocate a receive buffer for a pending packet. We use a
752 * pre-allocated list of buffers of maximum AMSDU size (4K).
753 */
754 struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target,
755 enum htc_endpoint_id endpoint,
756 int len)
757 {
758 struct ath6kl *ar = target->dev->ar;
759 struct htc_packet *packet = NULL;
760 struct list_head *pkt_pos;
761 int refill_cnt = 0, depth = 0;
762
763 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n",
764 __func__, endpoint, len);
765
766 if ((len <= ATH6KL_BUFFER_SIZE) ||
767 (len > ATH6KL_AMSDU_BUFFER_SIZE))
768 return NULL;
769
770 spin_lock_bh(&ar->lock);
771
772 if (list_empty(&ar->amsdu_rx_buffer_queue)) {
773 spin_unlock_bh(&ar->lock);
774 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS;
775 goto refill_buf;
776 }
777
778 packet = list_first_entry(&ar->amsdu_rx_buffer_queue,
779 struct htc_packet, list);
780 list_del(&packet->list);
781 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue)
782 depth++;
783
784 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth;
785 spin_unlock_bh(&ar->lock);
786
787 /* set actual endpoint ID */
788 packet->endpoint = endpoint;
789
790 refill_buf:
791 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD)
792 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt);
793
794 return packet;
795 }
796
797 static void aggr_slice_amsdu(struct aggr_info *p_aggr,
798 struct rxtid *rxtid, struct sk_buff *skb)
799 {
800 struct sk_buff *new_skb;
801 struct ethhdr *hdr;
802 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len;
803 u8 *framep;
804
805 mac_hdr_len = sizeof(struct ethhdr);
806 framep = skb->data + mac_hdr_len;
807 amsdu_len = skb->len - mac_hdr_len;
808
809 while (amsdu_len > mac_hdr_len) {
810 hdr = (struct ethhdr *) framep;
811 payload_8023_len = ntohs(hdr->h_proto);
812
813 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN ||
814 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) {
815 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n",
816 payload_8023_len);
817 break;
818 }
819
820 frame_8023_len = payload_8023_len + mac_hdr_len;
821 new_skb = aggr_get_free_skb(p_aggr);
822 if (!new_skb) {
823 ath6kl_err("no buffer available\n");
824 break;
825 }
826
827 memcpy(new_skb->data, framep, frame_8023_len);
828 skb_put(new_skb, frame_8023_len);
829 if (ath6kl_wmi_dot3_2_dix(new_skb)) {
830 ath6kl_err("dot3_2_dix error\n");
831 dev_kfree_skb(new_skb);
832 break;
833 }
834
835 skb_queue_tail(&rxtid->q, new_skb);
836
837 /* Is this the last subframe within this aggregate ? */
838 if ((amsdu_len - frame_8023_len) == 0)
839 break;
840
841 /* Add the length of A-MSDU subframe padding bytes -
842 * Round to nearest word.
843 */
844 frame_8023_len = ALIGN(frame_8023_len, 4);
845
846 framep += frame_8023_len;
847 amsdu_len -= frame_8023_len;
848 }
849
850 dev_kfree_skb(skb);
851 }
852
853 static void aggr_deque_frms(struct aggr_info *p_aggr, u8 tid,
854 u16 seq_no, u8 order)
855 {
856 struct sk_buff *skb;
857 struct rxtid *rxtid;
858 struct skb_hold_q *node;
859 u16 idx, idx_end, seq_end;
860 struct rxtid_stats *stats;
861
862 if (!p_aggr)
863 return;
864
865 rxtid = &p_aggr->rx_tid[tid];
866 stats = &p_aggr->stat[tid];
867
868 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
869
870 /*
871 * idx_end is typically the last possible frame in the window,
872 * but changes to 'the' seq_no, when BAR comes. If seq_no
873 * is non-zero, we will go up to that and stop.
874 * Note: last seq no in current window will occupy the same
875 * index position as index that is just previous to start.
876 * An imp point : if win_sz is 7, for seq_no space of 4095,
877 * then, there would be holes when sequence wrap around occurs.
878 * Target should judiciously choose the win_sz, based on
879 * this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz
880 * 2, 4, 8, 16 win_sz works fine).
881 * We must deque from "idx" to "idx_end", including both.
882 */
883 seq_end = seq_no ? seq_no : rxtid->seq_next;
884 idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz);
885
886 spin_lock_bh(&rxtid->lock);
887
888 do {
889 node = &rxtid->hold_q[idx];
890 if ((order == 1) && (!node->skb))
891 break;
892
893 if (node->skb) {
894 if (node->is_amsdu)
895 aggr_slice_amsdu(p_aggr, rxtid, node->skb);
896 else
897 skb_queue_tail(&rxtid->q, node->skb);
898 node->skb = NULL;
899 } else
900 stats->num_hole++;
901
902 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next);
903 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
904 } while (idx != idx_end);
905
906 spin_unlock_bh(&rxtid->lock);
907
908 stats->num_delivered += skb_queue_len(&rxtid->q);
909
910 while ((skb = skb_dequeue(&rxtid->q)))
911 ath6kl_deliver_frames_to_nw_stack(p_aggr->dev, skb);
912 }
913
914 static bool aggr_process_recv_frm(struct aggr_info *agg_info, u8 tid,
915 u16 seq_no,
916 bool is_amsdu, struct sk_buff *frame)
917 {
918 struct rxtid *rxtid;
919 struct rxtid_stats *stats;
920 struct sk_buff *skb;
921 struct skb_hold_q *node;
922 u16 idx, st, cur, end;
923 bool is_queued = false;
924 u16 extended_end;
925
926 rxtid = &agg_info->rx_tid[tid];
927 stats = &agg_info->stat[tid];
928
929 stats->num_into_aggr++;
930
931 if (!rxtid->aggr) {
932 if (is_amsdu) {
933 aggr_slice_amsdu(agg_info, rxtid, frame);
934 is_queued = true;
935 stats->num_amsdu++;
936 while ((skb = skb_dequeue(&rxtid->q)))
937 ath6kl_deliver_frames_to_nw_stack(agg_info->dev,
938 skb);
939 }
940 return is_queued;
941 }
942
943 /* Check the incoming sequence no, if it's in the window */
944 st = rxtid->seq_next;
945 cur = seq_no;
946 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO;
947
948 if (((st < end) && (cur < st || cur > end)) ||
949 ((st > end) && (cur > end) && (cur < st))) {
950 extended_end = (end + rxtid->hold_q_sz - 1) &
951 ATH6KL_MAX_SEQ_NO;
952
953 if (((end < extended_end) &&
954 (cur < end || cur > extended_end)) ||
955 ((end > extended_end) && (cur > extended_end) &&
956 (cur < end))) {
957 aggr_deque_frms(agg_info, tid, 0, 0);
958 if (cur >= rxtid->hold_q_sz - 1)
959 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1);
960 else
961 rxtid->seq_next = ATH6KL_MAX_SEQ_NO -
962 (rxtid->hold_q_sz - 2 - cur);
963 } else {
964 /*
965 * Dequeue only those frames that are outside the
966 * new shifted window.
967 */
968 if (cur >= rxtid->hold_q_sz - 1)
969 st = cur - (rxtid->hold_q_sz - 1);
970 else
971 st = ATH6KL_MAX_SEQ_NO -
972 (rxtid->hold_q_sz - 2 - cur);
973
974 aggr_deque_frms(agg_info, tid, st, 0);
975 }
976
977 stats->num_oow++;
978 }
979
980 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz);
981
982 node = &rxtid->hold_q[idx];
983
984 spin_lock_bh(&rxtid->lock);
985
986 /*
987 * Is the cur frame duplicate or something beyond our window(hold_q
988 * -> which is 2x, already)?
989 *
990 * 1. Duplicate is easy - drop incoming frame.
991 * 2. Not falling in current sliding window.
992 * 2a. is the frame_seq_no preceding current tid_seq_no?
993 * -> drop the frame. perhaps sender did not get our ACK.
994 * this is taken care of above.
995 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ);
996 * -> Taken care of it above, by moving window forward.
997 */
998 dev_kfree_skb(node->skb);
999 stats->num_dups++;
1000
1001 node->skb = frame;
1002 is_queued = true;
1003 node->is_amsdu = is_amsdu;
1004 node->seq_no = seq_no;
1005
1006 if (node->is_amsdu)
1007 stats->num_amsdu++;
1008 else
1009 stats->num_mpdu++;
1010
1011 spin_unlock_bh(&rxtid->lock);
1012
1013 aggr_deque_frms(agg_info, tid, 0, 1);
1014
1015 if (agg_info->timer_scheduled)
1016 rxtid->progress = true;
1017 else
1018 for (idx = 0 ; idx < rxtid->hold_q_sz; idx++) {
1019 if (rxtid->hold_q[idx].skb) {
1020 /*
1021 * There is a frame in the queue and no
1022 * timer so start a timer to ensure that
1023 * the frame doesn't remain stuck
1024 * forever.
1025 */
1026 agg_info->timer_scheduled = true;
1027 mod_timer(&agg_info->timer,
1028 (jiffies +
1029 HZ * (AGGR_RX_TIMEOUT) / 1000));
1030 rxtid->progress = false;
1031 rxtid->timer_mon = true;
1032 break;
1033 }
1034 }
1035
1036 return is_queued;
1037 }
1038
1039 void ath6kl_rx(struct htc_target *target, struct htc_packet *packet)
1040 {
1041 struct ath6kl *ar = target->dev->ar;
1042 struct sk_buff *skb = packet->pkt_cntxt;
1043 struct wmi_rx_meta_v2 *meta;
1044 struct wmi_data_hdr *dhdr;
1045 int min_hdr_len;
1046 u8 meta_type, dot11_hdr = 0;
1047 int status = packet->status;
1048 enum htc_endpoint_id ept = packet->endpoint;
1049 bool is_amsdu, prev_ps, ps_state = false;
1050 struct ath6kl_sta *conn = NULL;
1051 struct sk_buff *skb1 = NULL;
1052 struct ethhdr *datap = NULL;
1053 /* TODO: Findout vif */
1054 struct ath6kl_vif *vif = ar->vif;
1055 u16 seq_no, offset;
1056 u8 tid;
1057
1058 ath6kl_dbg(ATH6KL_DBG_WLAN_RX,
1059 "%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d",
1060 __func__, ar, ept, skb, packet->buf,
1061 packet->act_len, status);
1062
1063 if (status || !(skb->data + HTC_HDR_LENGTH)) {
1064 vif->net_stats.rx_errors++;
1065 dev_kfree_skb(skb);
1066 return;
1067 }
1068
1069 /*
1070 * Take lock to protect buffer counts and adaptive power throughput
1071 * state.
1072 */
1073 spin_lock_bh(&ar->lock);
1074
1075 vif->net_stats.rx_packets++;
1076 vif->net_stats.rx_bytes += packet->act_len;
1077
1078 spin_unlock_bh(&ar->lock);
1079
1080 skb_put(skb, packet->act_len + HTC_HDR_LENGTH);
1081 skb_pull(skb, HTC_HDR_LENGTH);
1082
1083 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "rx ",
1084 skb->data, skb->len);
1085
1086 skb->dev = ar->net_dev;
1087
1088 if (!test_bit(WMI_ENABLED, &ar->flag)) {
1089 if (EPPING_ALIGNMENT_PAD > 0)
1090 skb_pull(skb, EPPING_ALIGNMENT_PAD);
1091 ath6kl_deliver_frames_to_nw_stack(ar->net_dev, skb);
1092 return;
1093 }
1094
1095 if (ept == ar->ctrl_ep) {
1096 ath6kl_wmi_control_rx(ar->wmi, skb);
1097 return;
1098 }
1099
1100 min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) +
1101 sizeof(struct ath6kl_llc_snap_hdr);
1102
1103 dhdr = (struct wmi_data_hdr *) skb->data;
1104
1105 /*
1106 * In the case of AP mode we may receive NULL data frames
1107 * that do not have LLC hdr. They are 16 bytes in size.
1108 * Allow these frames in the AP mode.
1109 */
1110 if (vif->nw_type != AP_NETWORK &&
1111 ((packet->act_len < min_hdr_len) ||
1112 (packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) {
1113 ath6kl_info("frame len is too short or too long\n");
1114 vif->net_stats.rx_errors++;
1115 vif->net_stats.rx_length_errors++;
1116 dev_kfree_skb(skb);
1117 return;
1118 }
1119
1120 /* Get the Power save state of the STA */
1121 if (vif->nw_type == AP_NETWORK) {
1122 meta_type = wmi_data_hdr_get_meta(dhdr);
1123
1124 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) &
1125 WMI_DATA_HDR_PS_MASK);
1126
1127 offset = sizeof(struct wmi_data_hdr);
1128
1129 switch (meta_type) {
1130 case 0:
1131 break;
1132 case WMI_META_VERSION_1:
1133 offset += sizeof(struct wmi_rx_meta_v1);
1134 break;
1135 case WMI_META_VERSION_2:
1136 offset += sizeof(struct wmi_rx_meta_v2);
1137 break;
1138 default:
1139 break;
1140 }
1141
1142 datap = (struct ethhdr *) (skb->data + offset);
1143 conn = ath6kl_find_sta(ar, datap->h_source);
1144
1145 if (!conn) {
1146 dev_kfree_skb(skb);
1147 return;
1148 }
1149
1150 /*
1151 * If there is a change in PS state of the STA,
1152 * take appropriate steps:
1153 *
1154 * 1. If Sleep-->Awake, flush the psq for the STA
1155 * Clear the PVB for the STA.
1156 * 2. If Awake-->Sleep, Starting queueing frames
1157 * the STA.
1158 */
1159 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP);
1160
1161 if (ps_state)
1162 conn->sta_flags |= STA_PS_SLEEP;
1163 else
1164 conn->sta_flags &= ~STA_PS_SLEEP;
1165
1166 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) {
1167 if (!(conn->sta_flags & STA_PS_SLEEP)) {
1168 struct sk_buff *skbuff = NULL;
1169
1170 spin_lock_bh(&conn->psq_lock);
1171 while ((skbuff = skb_dequeue(&conn->psq))
1172 != NULL) {
1173 spin_unlock_bh(&conn->psq_lock);
1174 ath6kl_data_tx(skbuff, ar->net_dev);
1175 spin_lock_bh(&conn->psq_lock);
1176 }
1177 spin_unlock_bh(&conn->psq_lock);
1178 /* Clear the PVB for this STA */
1179 ath6kl_wmi_set_pvb_cmd(ar->wmi, conn->aid, 0);
1180 }
1181 }
1182
1183 /* drop NULL data frames here */
1184 if ((packet->act_len < min_hdr_len) ||
1185 (packet->act_len >
1186 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) {
1187 dev_kfree_skb(skb);
1188 return;
1189 }
1190 }
1191
1192 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false;
1193 tid = wmi_data_hdr_get_up(dhdr);
1194 seq_no = wmi_data_hdr_get_seqno(dhdr);
1195 meta_type = wmi_data_hdr_get_meta(dhdr);
1196 dot11_hdr = wmi_data_hdr_get_dot11(dhdr);
1197 skb_pull(skb, sizeof(struct wmi_data_hdr));
1198
1199 switch (meta_type) {
1200 case WMI_META_VERSION_1:
1201 skb_pull(skb, sizeof(struct wmi_rx_meta_v1));
1202 break;
1203 case WMI_META_VERSION_2:
1204 meta = (struct wmi_rx_meta_v2 *) skb->data;
1205 if (meta->csum_flags & 0x1) {
1206 skb->ip_summed = CHECKSUM_COMPLETE;
1207 skb->csum = (__force __wsum) meta->csum;
1208 }
1209 skb_pull(skb, sizeof(struct wmi_rx_meta_v2));
1210 break;
1211 default:
1212 break;
1213 }
1214
1215 if (dot11_hdr)
1216 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb);
1217 else if (!is_amsdu)
1218 status = ath6kl_wmi_dot3_2_dix(skb);
1219
1220 if (status) {
1221 /*
1222 * Drop frames that could not be processed (lack of
1223 * memory, etc.)
1224 */
1225 dev_kfree_skb(skb);
1226 return;
1227 }
1228
1229 if (!(ar->net_dev->flags & IFF_UP)) {
1230 dev_kfree_skb(skb);
1231 return;
1232 }
1233
1234 if (vif->nw_type == AP_NETWORK) {
1235 datap = (struct ethhdr *) skb->data;
1236 if (is_multicast_ether_addr(datap->h_dest))
1237 /*
1238 * Bcast/Mcast frames should be sent to the
1239 * OS stack as well as on the air.
1240 */
1241 skb1 = skb_copy(skb, GFP_ATOMIC);
1242 else {
1243 /*
1244 * Search for a connected STA with dstMac
1245 * as the Mac address. If found send the
1246 * frame to it on the air else send the
1247 * frame up the stack.
1248 */
1249 conn = ath6kl_find_sta(ar, datap->h_dest);
1250
1251 if (conn && ar->intra_bss) {
1252 skb1 = skb;
1253 skb = NULL;
1254 } else if (conn && !ar->intra_bss) {
1255 dev_kfree_skb(skb);
1256 skb = NULL;
1257 }
1258 }
1259 if (skb1)
1260 ath6kl_data_tx(skb1, ar->net_dev);
1261
1262 if (skb == NULL) {
1263 /* nothing to deliver up the stack */
1264 return;
1265 }
1266 }
1267
1268 datap = (struct ethhdr *) skb->data;
1269
1270 if (is_unicast_ether_addr(datap->h_dest) &&
1271 aggr_process_recv_frm(vif->aggr_cntxt, tid, seq_no,
1272 is_amsdu, skb))
1273 /* aggregation code will handle the skb */
1274 return;
1275
1276 ath6kl_deliver_frames_to_nw_stack(ar->net_dev, skb);
1277 }
1278
1279 static void aggr_timeout(unsigned long arg)
1280 {
1281 u8 i, j;
1282 struct aggr_info *p_aggr = (struct aggr_info *) arg;
1283 struct rxtid *rxtid;
1284 struct rxtid_stats *stats;
1285
1286 for (i = 0; i < NUM_OF_TIDS; i++) {
1287 rxtid = &p_aggr->rx_tid[i];
1288 stats = &p_aggr->stat[i];
1289
1290 if (!rxtid->aggr || !rxtid->timer_mon || rxtid->progress)
1291 continue;
1292
1293 stats->num_timeouts++;
1294 ath6kl_dbg(ATH6KL_DBG_AGGR,
1295 "aggr timeout (st %d end %d)\n",
1296 rxtid->seq_next,
1297 ((rxtid->seq_next + rxtid->hold_q_sz-1) &
1298 ATH6KL_MAX_SEQ_NO));
1299 aggr_deque_frms(p_aggr, i, 0, 0);
1300 }
1301
1302 p_aggr->timer_scheduled = false;
1303
1304 for (i = 0; i < NUM_OF_TIDS; i++) {
1305 rxtid = &p_aggr->rx_tid[i];
1306
1307 if (rxtid->aggr && rxtid->hold_q) {
1308 for (j = 0; j < rxtid->hold_q_sz; j++) {
1309 if (rxtid->hold_q[j].skb) {
1310 p_aggr->timer_scheduled = true;
1311 rxtid->timer_mon = true;
1312 rxtid->progress = false;
1313 break;
1314 }
1315 }
1316
1317 if (j >= rxtid->hold_q_sz)
1318 rxtid->timer_mon = false;
1319 }
1320 }
1321
1322 if (p_aggr->timer_scheduled)
1323 mod_timer(&p_aggr->timer,
1324 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT));
1325 }
1326
1327 static void aggr_delete_tid_state(struct aggr_info *p_aggr, u8 tid)
1328 {
1329 struct rxtid *rxtid;
1330 struct rxtid_stats *stats;
1331
1332 if (!p_aggr || tid >= NUM_OF_TIDS)
1333 return;
1334
1335 rxtid = &p_aggr->rx_tid[tid];
1336 stats = &p_aggr->stat[tid];
1337
1338 if (rxtid->aggr)
1339 aggr_deque_frms(p_aggr, tid, 0, 0);
1340
1341 rxtid->aggr = false;
1342 rxtid->progress = false;
1343 rxtid->timer_mon = false;
1344 rxtid->win_sz = 0;
1345 rxtid->seq_next = 0;
1346 rxtid->hold_q_sz = 0;
1347
1348 kfree(rxtid->hold_q);
1349 rxtid->hold_q = NULL;
1350
1351 memset(stats, 0, sizeof(struct rxtid_stats));
1352 }
1353
1354 void aggr_recv_addba_req_evt(struct ath6kl *ar, u8 tid, u16 seq_no, u8 win_sz)
1355 {
1356 /* TODO: Findout vif */
1357 struct ath6kl_vif *vif = ar->vif;
1358 struct aggr_info *p_aggr = vif->aggr_cntxt;
1359 struct rxtid *rxtid;
1360 struct rxtid_stats *stats;
1361 u16 hold_q_size;
1362
1363 if (!p_aggr)
1364 return;
1365
1366 rxtid = &p_aggr->rx_tid[tid];
1367 stats = &p_aggr->stat[tid];
1368
1369 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX)
1370 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n",
1371 __func__, win_sz, tid);
1372
1373 if (rxtid->aggr)
1374 aggr_delete_tid_state(p_aggr, tid);
1375
1376 rxtid->seq_next = seq_no;
1377 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q);
1378 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL);
1379 if (!rxtid->hold_q)
1380 return;
1381
1382 rxtid->win_sz = win_sz;
1383 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz);
1384 if (!skb_queue_empty(&rxtid->q))
1385 return;
1386
1387 rxtid->aggr = true;
1388 }
1389
1390 struct aggr_info *aggr_init(struct net_device *dev)
1391 {
1392 struct aggr_info *p_aggr = NULL;
1393 struct rxtid *rxtid;
1394 u8 i;
1395
1396 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL);
1397 if (!p_aggr) {
1398 ath6kl_err("failed to alloc memory for aggr_node\n");
1399 return NULL;
1400 }
1401
1402 p_aggr->aggr_sz = AGGR_SZ_DEFAULT;
1403 p_aggr->dev = dev;
1404 init_timer(&p_aggr->timer);
1405 p_aggr->timer.function = aggr_timeout;
1406 p_aggr->timer.data = (unsigned long) p_aggr;
1407
1408 p_aggr->timer_scheduled = false;
1409 skb_queue_head_init(&p_aggr->free_q);
1410
1411 ath6kl_alloc_netbufs(&p_aggr->free_q, AGGR_NUM_OF_FREE_NETBUFS);
1412
1413 for (i = 0; i < NUM_OF_TIDS; i++) {
1414 rxtid = &p_aggr->rx_tid[i];
1415 rxtid->aggr = false;
1416 rxtid->progress = false;
1417 rxtid->timer_mon = false;
1418 skb_queue_head_init(&rxtid->q);
1419 spin_lock_init(&rxtid->lock);
1420 }
1421
1422 return p_aggr;
1423 }
1424
1425 void aggr_recv_delba_req_evt(struct ath6kl *ar, u8 tid)
1426 {
1427 /* TODO: Findout vif */
1428 struct ath6kl_vif *vif = ar->vif;
1429 struct aggr_info *p_aggr = vif->aggr_cntxt;
1430 struct rxtid *rxtid;
1431
1432 if (!p_aggr)
1433 return;
1434
1435 rxtid = &p_aggr->rx_tid[tid];
1436
1437 if (rxtid->aggr)
1438 aggr_delete_tid_state(p_aggr, tid);
1439 }
1440
1441 void aggr_reset_state(struct aggr_info *aggr_info)
1442 {
1443 u8 tid;
1444
1445 for (tid = 0; tid < NUM_OF_TIDS; tid++)
1446 aggr_delete_tid_state(aggr_info, tid);
1447 }
1448
1449 /* clean up our amsdu buffer list */
1450 void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar)
1451 {
1452 struct htc_packet *packet, *tmp_pkt;
1453
1454 spin_lock_bh(&ar->lock);
1455 if (list_empty(&ar->amsdu_rx_buffer_queue)) {
1456 spin_unlock_bh(&ar->lock);
1457 return;
1458 }
1459
1460 list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue,
1461 list) {
1462 list_del(&packet->list);
1463 spin_unlock_bh(&ar->lock);
1464 dev_kfree_skb(packet->pkt_cntxt);
1465 spin_lock_bh(&ar->lock);
1466 }
1467
1468 spin_unlock_bh(&ar->lock);
1469 }
1470
1471 void aggr_module_destroy(struct aggr_info *aggr_info)
1472 {
1473 struct rxtid *rxtid;
1474 u8 i, k;
1475
1476 if (!aggr_info)
1477 return;
1478
1479 if (aggr_info->timer_scheduled) {
1480 del_timer(&aggr_info->timer);
1481 aggr_info->timer_scheduled = false;
1482 }
1483
1484 for (i = 0; i < NUM_OF_TIDS; i++) {
1485 rxtid = &aggr_info->rx_tid[i];
1486 if (rxtid->hold_q) {
1487 for (k = 0; k < rxtid->hold_q_sz; k++)
1488 dev_kfree_skb(rxtid->hold_q[k].skb);
1489 kfree(rxtid->hold_q);
1490 }
1491
1492 skb_queue_purge(&rxtid->q);
1493 }
1494
1495 skb_queue_purge(&aggr_info->free_q);
1496 kfree(aggr_info);
1497 }
Linus' kernel tree