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Linux 4.4.145
[linux/fpc-iii.git] / drivers / net / wireless / ath / ath6kl / txrx.c
blob40432fe7a5d2cc112a4ce6d68bb8fd43a115e01f
1 /*
2 * Copyright (c) 2004-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19
20 #include "core.h"
21 #include "debug.h"
22 #include "htc-ops.h"
23 #include "trace.h"
24
25 /*
26 * tid - tid_mux0..tid_mux3
27 * aid - tid_mux4..tid_mux7
28 */
29 #define ATH6KL_TID_MASK 0xf
30 #define ATH6KL_AID_SHIFT 4
31
32 static inline u8 ath6kl_get_tid(u8 tid_mux)
33 {
34 return tid_mux & ATH6KL_TID_MASK;
35 }
36
37 static inline u8 ath6kl_get_aid(u8 tid_mux)
38 {
39 return tid_mux >> ATH6KL_AID_SHIFT;
40 }
41
42 static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev,
43 u32 *map_no)
44 {
45 struct ath6kl *ar = ath6kl_priv(dev);
46 struct ethhdr *eth_hdr;
47 u32 i, ep_map = -1;
48 u8 *datap;
49
50 *map_no = 0;
51 datap = skb->data;
52 eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr));
53
54 if (is_multicast_ether_addr(eth_hdr->h_dest))
55 return ENDPOINT_2;
56
57 for (i = 0; i < ar->node_num; i++) {
58 if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr,
59 ETH_ALEN) == 0) {
60 *map_no = i + 1;
61 ar->node_map[i].tx_pend++;
62 return ar->node_map[i].ep_id;
63 }
64
65 if ((ep_map == -1) && !ar->node_map[i].tx_pend)
66 ep_map = i;
67 }
68
69 if (ep_map == -1) {
70 ep_map = ar->node_num;
71 ar->node_num++;
72 if (ar->node_num > MAX_NODE_NUM)
73 return ENDPOINT_UNUSED;
74 }
75
76 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN);
77
78 for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) {
79 if (!ar->tx_pending[i]) {
80 ar->node_map[ep_map].ep_id = i;
81 break;
82 }
83
84 /*
85 * No free endpoint is available, start redistribution on
86 * the inuse endpoints.
87 */
88 if (i == ENDPOINT_5) {
89 ar->node_map[ep_map].ep_id = ar->next_ep_id;
90 ar->next_ep_id++;
91 if (ar->next_ep_id > ENDPOINT_5)
92 ar->next_ep_id = ENDPOINT_2;
93 }
94 }
95
96 *map_no = ep_map + 1;
97 ar->node_map[ep_map].tx_pend++;
98
99 return ar->node_map[ep_map].ep_id;
100 }
101
102 static bool ath6kl_process_uapsdq(struct ath6kl_sta *conn,
103 struct ath6kl_vif *vif,
104 struct sk_buff *skb,
105 u32 *flags)
106 {
107 struct ath6kl *ar = vif->ar;
108 bool is_apsdq_empty = false;
109 struct ethhdr *datap = (struct ethhdr *) skb->data;
110 u8 up = 0, traffic_class, *ip_hdr;
111 u16 ether_type;
112 struct ath6kl_llc_snap_hdr *llc_hdr;
113
114 if (conn->sta_flags & STA_PS_APSD_TRIGGER) {
115 /*
116 * This tx is because of a uAPSD trigger, determine
117 * more and EOSP bit. Set EOSP if queue is empty
118 * or sufficient frames are delivered for this trigger.
119 */
120 spin_lock_bh(&conn->psq_lock);
121 if (!skb_queue_empty(&conn->apsdq))
122 *flags |= WMI_DATA_HDR_FLAGS_MORE;
123 else if (conn->sta_flags & STA_PS_APSD_EOSP)
124 *flags |= WMI_DATA_HDR_FLAGS_EOSP;
125 *flags |= WMI_DATA_HDR_FLAGS_UAPSD;
126 spin_unlock_bh(&conn->psq_lock);
127 return false;
128 } else if (!conn->apsd_info) {
129 return false;
130 }
131
132 if (test_bit(WMM_ENABLED, &vif->flags)) {
133 ether_type = be16_to_cpu(datap->h_proto);
134 if (is_ethertype(ether_type)) {
135 /* packet is in DIX format */
136 ip_hdr = (u8 *)(datap + 1);
137 } else {
138 /* packet is in 802.3 format */
139 llc_hdr = (struct ath6kl_llc_snap_hdr *)
140 (datap + 1);
141 ether_type = be16_to_cpu(llc_hdr->eth_type);
142 ip_hdr = (u8 *)(llc_hdr + 1);
143 }
144
145 if (ether_type == IP_ETHERTYPE)
146 up = ath6kl_wmi_determine_user_priority(
147 ip_hdr, 0);
148 }
149
150 traffic_class = ath6kl_wmi_get_traffic_class(up);
151
152 if ((conn->apsd_info & (1 << traffic_class)) == 0)
153 return false;
154
155 /* Queue the frames if the STA is sleeping */
156 spin_lock_bh(&conn->psq_lock);
157 is_apsdq_empty = skb_queue_empty(&conn->apsdq);
158 skb_queue_tail(&conn->apsdq, skb);
159 spin_unlock_bh(&conn->psq_lock);
160
161 /*
162 * If this is the first pkt getting queued
163 * for this STA, update the PVB for this STA
164 */
165 if (is_apsdq_empty) {
166 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi,
167 vif->fw_vif_idx,
168 conn->aid, 1, 0);
169 }
170 *flags |= WMI_DATA_HDR_FLAGS_UAPSD;
171
172 return true;
173 }
174
175 static bool ath6kl_process_psq(struct ath6kl_sta *conn,
176 struct ath6kl_vif *vif,
177 struct sk_buff *skb,
178 u32 *flags)
179 {
180 bool is_psq_empty = false;
181 struct ath6kl *ar = vif->ar;
182
183 if (conn->sta_flags & STA_PS_POLLED) {
184 spin_lock_bh(&conn->psq_lock);
185 if (!skb_queue_empty(&conn->psq))
186 *flags |= WMI_DATA_HDR_FLAGS_MORE;
187 spin_unlock_bh(&conn->psq_lock);
188 return false;
189 }
190
191 /* Queue the frames if the STA is sleeping */
192 spin_lock_bh(&conn->psq_lock);
193 is_psq_empty = skb_queue_empty(&conn->psq);
194 skb_queue_tail(&conn->psq, skb);
195 spin_unlock_bh(&conn->psq_lock);
196
197 /*
198 * If this is the first pkt getting queued
199 * for this STA, update the PVB for this
200 * STA.
201 */
202 if (is_psq_empty)
203 ath6kl_wmi_set_pvb_cmd(ar->wmi,
204 vif->fw_vif_idx,
205 conn->aid, 1);
206 return true;
207 }
208
209 static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb,
210 u32 *flags)
211 {
212 struct ethhdr *datap = (struct ethhdr *) skb->data;
213 struct ath6kl_sta *conn = NULL;
214 bool ps_queued = false;
215 struct ath6kl *ar = vif->ar;
216
217 if (is_multicast_ether_addr(datap->h_dest)) {
218 u8 ctr = 0;
219 bool q_mcast = false;
220
221 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
222 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) {
223 q_mcast = true;
224 break;
225 }
226 }
227
228 if (q_mcast) {
229 /*
230 * If this transmit is not because of a Dtim Expiry
231 * q it.
232 */
233 if (!test_bit(DTIM_EXPIRED, &vif->flags)) {
234 bool is_mcastq_empty = false;
235
236 spin_lock_bh(&ar->mcastpsq_lock);
237 is_mcastq_empty =
238 skb_queue_empty(&ar->mcastpsq);
239 skb_queue_tail(&ar->mcastpsq, skb);
240 spin_unlock_bh(&ar->mcastpsq_lock);
241
242 /*
243 * If this is the first Mcast pkt getting
244 * queued indicate to the target to set the
245 * BitmapControl LSB of the TIM IE.
246 */
247 if (is_mcastq_empty)
248 ath6kl_wmi_set_pvb_cmd(ar->wmi,
249 vif->fw_vif_idx,
250 MCAST_AID, 1);
251
252 ps_queued = true;
253 } else {
254 /*
255 * This transmit is because of Dtim expiry.
256 * Determine if MoreData bit has to be set.
257 */
258 spin_lock_bh(&ar->mcastpsq_lock);
259 if (!skb_queue_empty(&ar->mcastpsq))
260 *flags |= WMI_DATA_HDR_FLAGS_MORE;
261 spin_unlock_bh(&ar->mcastpsq_lock);
262 }
263 }
264 } else {
265 conn = ath6kl_find_sta(vif, datap->h_dest);
266 if (!conn) {
267 dev_kfree_skb(skb);
268
269 /* Inform the caller that the skb is consumed */
270 return true;
271 }
272
273 if (conn->sta_flags & STA_PS_SLEEP) {
274 ps_queued = ath6kl_process_uapsdq(conn,
275 vif, skb, flags);
276 if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD))
277 ps_queued = ath6kl_process_psq(conn,
278 vif, skb, flags);
279 }
280 }
281 return ps_queued;
282 }
283
284 /* Tx functions */
285
286 int ath6kl_control_tx(void *devt, struct sk_buff *skb,
287 enum htc_endpoint_id eid)
288 {
289 struct ath6kl *ar = devt;
290 int status = 0;
291 struct ath6kl_cookie *cookie = NULL;
292
293 trace_ath6kl_wmi_cmd(skb->data, skb->len);
294
295 if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW)) {
296 dev_kfree_skb(skb);
297 return -EACCES;
298 }
299
300 if (WARN_ON_ONCE(eid == ENDPOINT_UNUSED ||
301 eid >= ENDPOINT_MAX)) {
302 status = -EINVAL;
303 goto fail_ctrl_tx;
304 }
305
306 spin_lock_bh(&ar->lock);
307
308 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
309 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__,
310 skb, skb->len, eid);
311
312 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) {
313 /*
314 * Control endpoint is full, don't allocate resources, we
315 * are just going to drop this packet.
316 */
317 cookie = NULL;
318 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n",
319 skb, skb->len);
320 } else {
321 cookie = ath6kl_alloc_cookie(ar);
322 }
323
324 if (cookie == NULL) {
325 spin_unlock_bh(&ar->lock);
326 status = -ENOMEM;
327 goto fail_ctrl_tx;
328 }
329
330 ar->tx_pending[eid]++;
331
332 if (eid != ar->ctrl_ep)
333 ar->total_tx_data_pend++;
334
335 spin_unlock_bh(&ar->lock);
336
337 cookie->skb = skb;
338 cookie->map_no = 0;
339 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
340 eid, ATH6KL_CONTROL_PKT_TAG);
341 cookie->htc_pkt.skb = skb;
342
343 /*
344 * This interface is asynchronous, if there is an error, cleanup
345 * will happen in the TX completion callback.
346 */
347 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
348
349 return 0;
350
351 fail_ctrl_tx:
352 dev_kfree_skb(skb);
353 return status;
354 }
355
356 int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev)
357 {
358 struct ath6kl *ar = ath6kl_priv(dev);
359 struct ath6kl_cookie *cookie = NULL;
360 enum htc_endpoint_id eid = ENDPOINT_UNUSED;
361 struct ath6kl_vif *vif = netdev_priv(dev);
362 u32 map_no = 0;
363 u16 htc_tag = ATH6KL_DATA_PKT_TAG;
364 u8 ac = 99; /* initialize to unmapped ac */
365 bool chk_adhoc_ps_mapping = false;
366 int ret;
367 struct wmi_tx_meta_v2 meta_v2;
368 void *meta;
369 u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed;
370 u8 meta_ver = 0;
371 u32 flags = 0;
372
373 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
374 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__,
375 skb, skb->data, skb->len);
376
377 /* If target is not associated */
378 if (!test_bit(CONNECTED, &vif->flags))
379 goto fail_tx;
380
381 if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON))
382 goto fail_tx;
383
384 if (!test_bit(WMI_READY, &ar->flag))
385 goto fail_tx;
386
387 /* AP mode Power saving processing */
388 if (vif->nw_type == AP_NETWORK) {
389 if (ath6kl_powersave_ap(vif, skb, &flags))
390 return 0;
391 }
392
393 if (test_bit(WMI_ENABLED, &ar->flag)) {
394 if ((dev->features & NETIF_F_IP_CSUM) &&
395 (csum == CHECKSUM_PARTIAL)) {
396 csum_start = skb->csum_start -
397 (skb_network_header(skb) - skb->head) +
398 sizeof(struct ath6kl_llc_snap_hdr);
399 csum_dest = skb->csum_offset + csum_start;
400 }
401
402 if (skb_headroom(skb) < dev->needed_headroom) {
403 struct sk_buff *tmp_skb = skb;
404
405 skb = skb_realloc_headroom(skb, dev->needed_headroom);
406 kfree_skb(tmp_skb);
407 if (skb == NULL) {
408 vif->net_stats.tx_dropped++;
409 return 0;
410 }
411 }
412
413 if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) {
414 ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n");
415 goto fail_tx;
416 }
417
418 if ((dev->features & NETIF_F_IP_CSUM) &&
419 (csum == CHECKSUM_PARTIAL)) {
420 meta_v2.csum_start = csum_start;
421 meta_v2.csum_dest = csum_dest;
422
423 /* instruct target to calculate checksum */
424 meta_v2.csum_flags = WMI_META_V2_FLAG_CSUM_OFFLOAD;
425 meta_ver = WMI_META_VERSION_2;
426 meta = &meta_v2;
427 } else {
428 meta_ver = 0;
429 meta = NULL;
430 }
431
432 ret = ath6kl_wmi_data_hdr_add(ar->wmi, skb,
433 DATA_MSGTYPE, flags, 0,
434 meta_ver,
435 meta, vif->fw_vif_idx);
436
437 if (ret) {
438 ath6kl_warn("failed to add wmi data header:%d\n"
439 , ret);
440 goto fail_tx;
441 }
442
443 if ((vif->nw_type == ADHOC_NETWORK) &&
444 ar->ibss_ps_enable && test_bit(CONNECTED, &vif->flags))
445 chk_adhoc_ps_mapping = true;
446 else {
447 /* get the stream mapping */
448 ret = ath6kl_wmi_implicit_create_pstream(ar->wmi,
449 vif->fw_vif_idx, skb,
450 0, test_bit(WMM_ENABLED, &vif->flags), &ac);
451 if (ret)
452 goto fail_tx;
453 }
454 } else {
455 goto fail_tx;
456 }
457
458 spin_lock_bh(&ar->lock);
459
460 if (chk_adhoc_ps_mapping)
461 eid = ath6kl_ibss_map_epid(skb, dev, &map_no);
462 else
463 eid = ar->ac2ep_map[ac];
464
465 if (eid == 0 || eid == ENDPOINT_UNUSED) {
466 ath6kl_err("eid %d is not mapped!\n", eid);
467 spin_unlock_bh(&ar->lock);
468 goto fail_tx;
469 }
470
471 /* allocate resource for this packet */
472 cookie = ath6kl_alloc_cookie(ar);
473
474 if (!cookie) {
475 spin_unlock_bh(&ar->lock);
476 goto fail_tx;
477 }
478
479 /* update counts while the lock is held */
480 ar->tx_pending[eid]++;
481 ar->total_tx_data_pend++;
482
483 spin_unlock_bh(&ar->lock);
484
485 if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) &&
486 skb_cloned(skb)) {
487 /*
488 * We will touch (move the buffer data to align it. Since the
489 * skb buffer is cloned and not only the header is changed, we
490 * have to copy it to allow the changes. Since we are copying
491 * the data here, we may as well align it by reserving suitable
492 * headroom to avoid the memmove in ath6kl_htc_tx_buf_align().
493 */
494 struct sk_buff *nskb;
495
496 nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC);
497 if (nskb == NULL)
498 goto fail_tx;
499 kfree_skb(skb);
500 skb = nskb;
501 }
502
503 cookie->skb = skb;
504 cookie->map_no = map_no;
505 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
506 eid, htc_tag);
507 cookie->htc_pkt.skb = skb;
508
509 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ",
510 skb->data, skb->len);
511
512 /*
513 * HTC interface is asynchronous, if this fails, cleanup will
514 * happen in the ath6kl_tx_complete callback.
515 */
516 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
517
518 return 0;
519
520 fail_tx:
521 dev_kfree_skb(skb);
522
523 vif->net_stats.tx_dropped++;
524 vif->net_stats.tx_aborted_errors++;
525
526 return 0;
527 }
528
529 /* indicate tx activity or inactivity on a WMI stream */
530 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active)
531 {
532 struct ath6kl *ar = devt;
533 enum htc_endpoint_id eid;
534 int i;
535
536 eid = ar->ac2ep_map[traffic_class];
537
538 if (!test_bit(WMI_ENABLED, &ar->flag))
539 goto notify_htc;
540
541 spin_lock_bh(&ar->lock);
542
543 ar->ac_stream_active[traffic_class] = active;
544
545 if (active) {
546 /*
547 * Keep track of the active stream with the highest
548 * priority.
549 */
550 if (ar->ac_stream_pri_map[traffic_class] >
551 ar->hiac_stream_active_pri)
552 /* set the new highest active priority */
553 ar->hiac_stream_active_pri =
554 ar->ac_stream_pri_map[traffic_class];
555
556 } else {
557 /*
558 * We may have to search for the next active stream
559 * that is the highest priority.
560 */
561 if (ar->hiac_stream_active_pri ==
562 ar->ac_stream_pri_map[traffic_class]) {
563 /*
564 * The highest priority stream just went inactive
565 * reset and search for the "next" highest "active"
566 * priority stream.
567 */
568 ar->hiac_stream_active_pri = 0;
569
570 for (i = 0; i < WMM_NUM_AC; i++) {
571 if (ar->ac_stream_active[i] &&
572 (ar->ac_stream_pri_map[i] >
573 ar->hiac_stream_active_pri))
574 /*
575 * Set the new highest active
576 * priority.
577 */
578 ar->hiac_stream_active_pri =
579 ar->ac_stream_pri_map[i];
580 }
581 }
582 }
583
584 spin_unlock_bh(&ar->lock);
585
586 notify_htc:
587 /* notify HTC, this may cause credit distribution changes */
588 ath6kl_htc_activity_changed(ar->htc_target, eid, active);
589 }
590
591 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target,
592 struct htc_packet *packet)
593 {
594 struct ath6kl *ar = target->dev->ar;
595 struct ath6kl_vif *vif;
596 enum htc_endpoint_id endpoint = packet->endpoint;
597 enum htc_send_full_action action = HTC_SEND_FULL_KEEP;
598
599 if (endpoint == ar->ctrl_ep) {
600 /*
601 * Under normal WMI if this is getting full, then something
602 * is running rampant the host should not be exhausting the
603 * WMI queue with too many commands the only exception to
604 * this is during testing using endpointping.
605 */
606 set_bit(WMI_CTRL_EP_FULL, &ar->flag);
607 ath6kl_err("wmi ctrl ep is full\n");
608 ath6kl_recovery_err_notify(ar, ATH6KL_FW_EP_FULL);
609 return action;
610 }
611
612 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG)
613 return action;
614
615 /*
616 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for
617 * the highest active stream.
618 */
619 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] <
620 ar->hiac_stream_active_pri &&
621 ar->cookie_count <=
622 target->endpoint[endpoint].tx_drop_packet_threshold)
623 /*
624 * Give preference to the highest priority stream by
625 * dropping the packets which overflowed.
626 */
627 action = HTC_SEND_FULL_DROP;
628
629 /* FIXME: Locking */
630 spin_lock_bh(&ar->list_lock);
631 list_for_each_entry(vif, &ar->vif_list, list) {
632 if (vif->nw_type == ADHOC_NETWORK ||
633 action != HTC_SEND_FULL_DROP) {
634 spin_unlock_bh(&ar->list_lock);
635
636 set_bit(NETQ_STOPPED, &vif->flags);
637 netif_stop_queue(vif->ndev);
638
639 return action;
640 }
641 }
642 spin_unlock_bh(&ar->list_lock);
643
644 return action;
645 }
646
647 /* TODO this needs to be looked at */
648 static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif,
649 enum htc_endpoint_id eid, u32 map_no)
650 {
651 struct ath6kl *ar = vif->ar;
652 u32 i;
653
654 if (vif->nw_type != ADHOC_NETWORK)
655 return;
656
657 if (!ar->ibss_ps_enable)
658 return;
659
660 if (eid == ar->ctrl_ep)
661 return;
662
663 if (map_no == 0)
664 return;
665
666 map_no--;
667 ar->node_map[map_no].tx_pend--;
668
669 if (ar->node_map[map_no].tx_pend)
670 return;
671
672 if (map_no != (ar->node_num - 1))
673 return;
674
675 for (i = ar->node_num; i > 0; i--) {
676 if (ar->node_map[i - 1].tx_pend)
677 break;
678
679 memset(&ar->node_map[i - 1], 0,
680 sizeof(struct ath6kl_node_mapping));
681 ar->node_num--;
682 }
683 }
684
685 void ath6kl_tx_complete(struct htc_target *target,
686 struct list_head *packet_queue)
687 {
688 struct ath6kl *ar = target->dev->ar;
689 struct sk_buff_head skb_queue;
690 struct htc_packet *packet;
691 struct sk_buff *skb;
692 struct ath6kl_cookie *ath6kl_cookie;
693 u32 map_no = 0;
694 int status;
695 enum htc_endpoint_id eid;
696 bool wake_event = false;
697 bool flushing[ATH6KL_VIF_MAX] = {false};
698 u8 if_idx;
699 struct ath6kl_vif *vif;
700
701 skb_queue_head_init(&skb_queue);
702
703 /* lock the driver as we update internal state */
704 spin_lock_bh(&ar->lock);
705
706 /* reap completed packets */
707 while (!list_empty(packet_queue)) {
708 packet = list_first_entry(packet_queue, struct htc_packet,
709 list);
710 list_del(&packet->list);
711
712 if (WARN_ON_ONCE(packet->endpoint == ENDPOINT_UNUSED ||
713 packet->endpoint >= ENDPOINT_MAX))
714 continue;
715
716 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt;
717 if (WARN_ON_ONCE(!ath6kl_cookie))
718 continue;
719
720 status = packet->status;
721 skb = ath6kl_cookie->skb;
722 eid = packet->endpoint;
723 map_no = ath6kl_cookie->map_no;
724
725 if (WARN_ON_ONCE(!skb || !skb->data)) {
726 dev_kfree_skb(skb);
727 ath6kl_free_cookie(ar, ath6kl_cookie);
728 continue;
729 }
730
731 __skb_queue_tail(&skb_queue, skb);
732
733 if (WARN_ON_ONCE(!status && (packet->act_len != skb->len))) {
734 ath6kl_free_cookie(ar, ath6kl_cookie);
735 continue;
736 }
737
738 ar->tx_pending[eid]--;
739
740 if (eid != ar->ctrl_ep)
741 ar->total_tx_data_pend--;
742
743 if (eid == ar->ctrl_ep) {
744 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag))
745 clear_bit(WMI_CTRL_EP_FULL, &ar->flag);
746
747 if (ar->tx_pending[eid] == 0)
748 wake_event = true;
749 }
750
751 if (eid == ar->ctrl_ep) {
752 if_idx = wmi_cmd_hdr_get_if_idx(
753 (struct wmi_cmd_hdr *) packet->buf);
754 } else {
755 if_idx = wmi_data_hdr_get_if_idx(
756 (struct wmi_data_hdr *) packet->buf);
757 }
758
759 vif = ath6kl_get_vif_by_index(ar, if_idx);
760 if (!vif) {
761 ath6kl_free_cookie(ar, ath6kl_cookie);
762 continue;
763 }
764
765 if (status) {
766 if (status == -ECANCELED)
767 /* a packet was flushed */
768 flushing[if_idx] = true;
769
770 vif->net_stats.tx_errors++;
771
772 if (status != -ENOSPC && status != -ECANCELED)
773 ath6kl_warn("tx complete error: %d\n", status);
774
775 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
776 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
777 __func__, skb, packet->buf, packet->act_len,
778 eid, "error!");
779 } else {
780 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
781 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
782 __func__, skb, packet->buf, packet->act_len,
783 eid, "OK");
784
785 flushing[if_idx] = false;
786 vif->net_stats.tx_packets++;
787 vif->net_stats.tx_bytes += skb->len;
788 }
789
790 ath6kl_tx_clear_node_map(vif, eid, map_no);
791
792 ath6kl_free_cookie(ar, ath6kl_cookie);
793
794 if (test_bit(NETQ_STOPPED, &vif->flags))
795 clear_bit(NETQ_STOPPED, &vif->flags);
796 }
797
798 spin_unlock_bh(&ar->lock);
799
800 __skb_queue_purge(&skb_queue);
801
802 /* FIXME: Locking */
803 spin_lock_bh(&ar->list_lock);
804 list_for_each_entry(vif, &ar->vif_list, list) {
805 if (test_bit(CONNECTED, &vif->flags) &&
806 !flushing[vif->fw_vif_idx]) {
807 spin_unlock_bh(&ar->list_lock);
808 netif_wake_queue(vif->ndev);
809 spin_lock_bh(&ar->list_lock);
810 }
811 }
812 spin_unlock_bh(&ar->list_lock);
813
814 if (wake_event)
815 wake_up(&ar->event_wq);
816
817 return;
818 }
819
820 void ath6kl_tx_data_cleanup(struct ath6kl *ar)
821 {
822 int i;
823
824 /* flush all the data (non-control) streams */
825 for (i = 0; i < WMM_NUM_AC; i++)
826 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i],
827 ATH6KL_DATA_PKT_TAG);
828 }
829
830 /* Rx functions */
831
832 static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev,
833 struct sk_buff *skb)
834 {
835 if (!skb)
836 return;
837
838 skb->dev = dev;
839
840 if (!(skb->dev->flags & IFF_UP)) {
841 dev_kfree_skb(skb);
842 return;
843 }
844
845 skb->protocol = eth_type_trans(skb, skb->dev);
846
847 netif_rx_ni(skb);
848 }
849
850 static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num)
851 {
852 struct sk_buff *skb;
853
854 while (num) {
855 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
856 if (!skb) {
857 ath6kl_err("netbuf allocation failed\n");
858 return;
859 }
860 skb_queue_tail(q, skb);
861 num--;
862 }
863 }
864
865 static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr)
866 {
867 struct sk_buff *skb = NULL;
868
869 if (skb_queue_len(&p_aggr->rx_amsdu_freeq) <
870 (AGGR_NUM_OF_FREE_NETBUFS >> 2))
871 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq,
872 AGGR_NUM_OF_FREE_NETBUFS);
873
874 skb = skb_dequeue(&p_aggr->rx_amsdu_freeq);
875
876 return skb;
877 }
878
879 void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint)
880 {
881 struct ath6kl *ar = target->dev->ar;
882 struct sk_buff *skb;
883 int rx_buf;
884 int n_buf_refill;
885 struct htc_packet *packet;
886 struct list_head queue;
887
888 n_buf_refill = ATH6KL_MAX_RX_BUFFERS -
889 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint);
890
891 if (n_buf_refill <= 0)
892 return;
893
894 INIT_LIST_HEAD(&queue);
895
896 ath6kl_dbg(ATH6KL_DBG_WLAN_RX,
897 "%s: providing htc with %d buffers at eid=%d\n",
898 __func__, n_buf_refill, endpoint);
899
900 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) {
901 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
902 if (!skb)
903 break;
904
905 packet = (struct htc_packet *) skb->head;
906 if (!IS_ALIGNED((unsigned long) skb->data, 4)) {
907 size_t len = skb_headlen(skb);
908 skb->data = PTR_ALIGN(skb->data - 4, 4);
909 skb_set_tail_pointer(skb, len);
910 }
911 set_htc_rxpkt_info(packet, skb, skb->data,
912 ATH6KL_BUFFER_SIZE, endpoint);
913 packet->skb = skb;
914 list_add_tail(&packet->list, &queue);
915 }
916
917 if (!list_empty(&queue))
918 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue);
919 }
920
921 void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count)
922 {
923 struct htc_packet *packet;
924 struct sk_buff *skb;
925
926 while (count) {
927 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE);
928 if (!skb)
929 return;
930
931 packet = (struct htc_packet *) skb->head;
932 if (!IS_ALIGNED((unsigned long) skb->data, 4)) {
933 size_t len = skb_headlen(skb);
934 skb->data = PTR_ALIGN(skb->data - 4, 4);
935 skb_set_tail_pointer(skb, len);
936 }
937 set_htc_rxpkt_info(packet, skb, skb->data,
938 ATH6KL_AMSDU_BUFFER_SIZE, 0);
939 packet->skb = skb;
940
941 spin_lock_bh(&ar->lock);
942 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue);
943 spin_unlock_bh(&ar->lock);
944 count--;
945 }
946 }
947
948 /*
949 * Callback to allocate a receive buffer for a pending packet. We use a
950 * pre-allocated list of buffers of maximum AMSDU size (4K).
951 */
952 struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target,
953 enum htc_endpoint_id endpoint,
954 int len)
955 {
956 struct ath6kl *ar = target->dev->ar;
957 struct htc_packet *packet = NULL;
958 struct list_head *pkt_pos;
959 int refill_cnt = 0, depth = 0;
960
961 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n",
962 __func__, endpoint, len);
963
964 if ((len <= ATH6KL_BUFFER_SIZE) ||
965 (len > ATH6KL_AMSDU_BUFFER_SIZE))
966 return NULL;
967
968 spin_lock_bh(&ar->lock);
969
970 if (list_empty(&ar->amsdu_rx_buffer_queue)) {
971 spin_unlock_bh(&ar->lock);
972 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS;
973 goto refill_buf;
974 }
975
976 packet = list_first_entry(&ar->amsdu_rx_buffer_queue,
977 struct htc_packet, list);
978 list_del(&packet->list);
979 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue)
980 depth++;
981
982 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth;
983 spin_unlock_bh(&ar->lock);
984
985 /* set actual endpoint ID */
986 packet->endpoint = endpoint;
987
988 refill_buf:
989 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD)
990 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt);
991
992 return packet;
993 }
994
995 static void aggr_slice_amsdu(struct aggr_info *p_aggr,
996 struct rxtid *rxtid, struct sk_buff *skb)
997 {
998 struct sk_buff *new_skb;
999 struct ethhdr *hdr;
1000 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len;
1001 u8 *framep;
1002
1003 mac_hdr_len = sizeof(struct ethhdr);
1004 framep = skb->data + mac_hdr_len;
1005 amsdu_len = skb->len - mac_hdr_len;
1006
1007 while (amsdu_len > mac_hdr_len) {
1008 hdr = (struct ethhdr *) framep;
1009 payload_8023_len = ntohs(hdr->h_proto);
1010
1011 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN ||
1012 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) {
1013 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n",
1014 payload_8023_len);
1015 break;
1016 }
1017
1018 frame_8023_len = payload_8023_len + mac_hdr_len;
1019 new_skb = aggr_get_free_skb(p_aggr);
1020 if (!new_skb) {
1021 ath6kl_err("no buffer available\n");
1022 break;
1023 }
1024
1025 memcpy(new_skb->data, framep, frame_8023_len);
1026 skb_put(new_skb, frame_8023_len);
1027 if (ath6kl_wmi_dot3_2_dix(new_skb)) {
1028 ath6kl_err("dot3_2_dix error\n");
1029 dev_kfree_skb(new_skb);
1030 break;
1031 }
1032
1033 skb_queue_tail(&rxtid->q, new_skb);
1034
1035 /* Is this the last subframe within this aggregate ? */
1036 if ((amsdu_len - frame_8023_len) == 0)
1037 break;
1038
1039 /* Add the length of A-MSDU subframe padding bytes -
1040 * Round to nearest word.
1041 */
1042 frame_8023_len = ALIGN(frame_8023_len, 4);
1043
1044 framep += frame_8023_len;
1045 amsdu_len -= frame_8023_len;
1046 }
1047
1048 dev_kfree_skb(skb);
1049 }
1050
1051 static void aggr_deque_frms(struct aggr_info_conn *agg_conn, u8 tid,
1052 u16 seq_no, u8 order)
1053 {
1054 struct sk_buff *skb;
1055 struct rxtid *rxtid;
1056 struct skb_hold_q *node;
1057 u16 idx, idx_end, seq_end;
1058 struct rxtid_stats *stats;
1059
1060 rxtid = &agg_conn->rx_tid[tid];
1061 stats = &agg_conn->stat[tid];
1062
1063 spin_lock_bh(&rxtid->lock);
1064 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
1065
1066 /*
1067 * idx_end is typically the last possible frame in the window,
1068 * but changes to 'the' seq_no, when BAR comes. If seq_no
1069 * is non-zero, we will go up to that and stop.
1070 * Note: last seq no in current window will occupy the same
1071 * index position as index that is just previous to start.
1072 * An imp point : if win_sz is 7, for seq_no space of 4095,
1073 * then, there would be holes when sequence wrap around occurs.
1074 * Target should judiciously choose the win_sz, based on
1075 * this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz
1076 * 2, 4, 8, 16 win_sz works fine).
1077 * We must deque from "idx" to "idx_end", including both.
1078 */
1079 seq_end = seq_no ? seq_no : rxtid->seq_next;
1080 idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz);
1081
1082 do {
1083 node = &rxtid->hold_q[idx];
1084 if ((order == 1) && (!node->skb))
1085 break;
1086
1087 if (node->skb) {
1088 if (node->is_amsdu)
1089 aggr_slice_amsdu(agg_conn->aggr_info, rxtid,
1090 node->skb);
1091 else
1092 skb_queue_tail(&rxtid->q, node->skb);
1093 node->skb = NULL;
1094 } else {
1095 stats->num_hole++;
1096 }
1097
1098 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next);
1099 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
1100 } while (idx != idx_end);
1101
1102 spin_unlock_bh(&rxtid->lock);
1103
1104 stats->num_delivered += skb_queue_len(&rxtid->q);
1105
1106 while ((skb = skb_dequeue(&rxtid->q)))
1107 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, skb);
1108 }
1109
1110 static bool aggr_process_recv_frm(struct aggr_info_conn *agg_conn, u8 tid,
1111 u16 seq_no,
1112 bool is_amsdu, struct sk_buff *frame)
1113 {
1114 struct rxtid *rxtid;
1115 struct rxtid_stats *stats;
1116 struct sk_buff *skb;
1117 struct skb_hold_q *node;
1118 u16 idx, st, cur, end;
1119 bool is_queued = false;
1120 u16 extended_end;
1121
1122 rxtid = &agg_conn->rx_tid[tid];
1123 stats = &agg_conn->stat[tid];
1124
1125 stats->num_into_aggr++;
1126
1127 if (!rxtid->aggr) {
1128 if (is_amsdu) {
1129 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, frame);
1130 is_queued = true;
1131 stats->num_amsdu++;
1132 while ((skb = skb_dequeue(&rxtid->q)))
1133 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev,
1134 skb);
1135 }
1136 return is_queued;
1137 }
1138
1139 /* Check the incoming sequence no, if it's in the window */
1140 st = rxtid->seq_next;
1141 cur = seq_no;
1142 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO;
1143
1144 if (((st < end) && (cur < st || cur > end)) ||
1145 ((st > end) && (cur > end) && (cur < st))) {
1146 extended_end = (end + rxtid->hold_q_sz - 1) &
1147 ATH6KL_MAX_SEQ_NO;
1148
1149 if (((end < extended_end) &&
1150 (cur < end || cur > extended_end)) ||
1151 ((end > extended_end) && (cur > extended_end) &&
1152 (cur < end))) {
1153 aggr_deque_frms(agg_conn, tid, 0, 0);
1154 spin_lock_bh(&rxtid->lock);
1155 if (cur >= rxtid->hold_q_sz - 1)
1156 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1);
1157 else
1158 rxtid->seq_next = ATH6KL_MAX_SEQ_NO -
1159 (rxtid->hold_q_sz - 2 - cur);
1160 spin_unlock_bh(&rxtid->lock);
1161 } else {
1162 /*
1163 * Dequeue only those frames that are outside the
1164 * new shifted window.
1165 */
1166 if (cur >= rxtid->hold_q_sz - 1)
1167 st = cur - (rxtid->hold_q_sz - 1);
1168 else
1169 st = ATH6KL_MAX_SEQ_NO -
1170 (rxtid->hold_q_sz - 2 - cur);
1171
1172 aggr_deque_frms(agg_conn, tid, st, 0);
1173 }
1174
1175 stats->num_oow++;
1176 }
1177
1178 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz);
1179
1180 node = &rxtid->hold_q[idx];
1181
1182 spin_lock_bh(&rxtid->lock);
1183
1184 /*
1185 * Is the cur frame duplicate or something beyond our window(hold_q
1186 * -> which is 2x, already)?
1187 *
1188 * 1. Duplicate is easy - drop incoming frame.
1189 * 2. Not falling in current sliding window.
1190 * 2a. is the frame_seq_no preceding current tid_seq_no?
1191 * -> drop the frame. perhaps sender did not get our ACK.
1192 * this is taken care of above.
1193 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ);
1194 * -> Taken care of it above, by moving window forward.
1195 */
1196 dev_kfree_skb(node->skb);
1197 stats->num_dups++;
1198
1199 node->skb = frame;
1200 is_queued = true;
1201 node->is_amsdu = is_amsdu;
1202 node->seq_no = seq_no;
1203
1204 if (node->is_amsdu)
1205 stats->num_amsdu++;
1206 else
1207 stats->num_mpdu++;
1208
1209 spin_unlock_bh(&rxtid->lock);
1210
1211 aggr_deque_frms(agg_conn, tid, 0, 1);
1212
1213 if (agg_conn->timer_scheduled)
1214 return is_queued;
1215
1216 spin_lock_bh(&rxtid->lock);
1217 for (idx = 0; idx < rxtid->hold_q_sz; idx++) {
1218 if (rxtid->hold_q[idx].skb) {
1219 /*
1220 * There is a frame in the queue and no
1221 * timer so start a timer to ensure that
1222 * the frame doesn't remain stuck
1223 * forever.
1224 */
1225 agg_conn->timer_scheduled = true;
1226 mod_timer(&agg_conn->timer,
1227 (jiffies + (HZ * AGGR_RX_TIMEOUT) / 1000));
1228 rxtid->timer_mon = true;
1229 break;
1230 }
1231 }
1232 spin_unlock_bh(&rxtid->lock);
1233
1234 return is_queued;
1235 }
1236
1237 static void ath6kl_uapsd_trigger_frame_rx(struct ath6kl_vif *vif,
1238 struct ath6kl_sta *conn)
1239 {
1240 struct ath6kl *ar = vif->ar;
1241 bool is_apsdq_empty, is_apsdq_empty_at_start;
1242 u32 num_frames_to_deliver, flags;
1243 struct sk_buff *skb = NULL;
1244
1245 /*
1246 * If the APSD q for this STA is not empty, dequeue and
1247 * send a pkt from the head of the q. Also update the
1248 * More data bit in the WMI_DATA_HDR if there are
1249 * more pkts for this STA in the APSD q.
1250 * If there are no more pkts for this STA,
1251 * update the APSD bitmap for this STA.
1252 */
1253
1254 num_frames_to_deliver = (conn->apsd_info >> ATH6KL_APSD_NUM_OF_AC) &
1255 ATH6KL_APSD_FRAME_MASK;
1256 /*
1257 * Number of frames to send in a service period is
1258 * indicated by the station
1259 * in the QOS_INFO of the association request
1260 * If it is zero, send all frames
1261 */
1262 if (!num_frames_to_deliver)
1263 num_frames_to_deliver = ATH6KL_APSD_ALL_FRAME;
1264
1265 spin_lock_bh(&conn->psq_lock);
1266 is_apsdq_empty = skb_queue_empty(&conn->apsdq);
1267 spin_unlock_bh(&conn->psq_lock);
1268 is_apsdq_empty_at_start = is_apsdq_empty;
1269
1270 while ((!is_apsdq_empty) && (num_frames_to_deliver)) {
1271 spin_lock_bh(&conn->psq_lock);
1272 skb = skb_dequeue(&conn->apsdq);
1273 is_apsdq_empty = skb_queue_empty(&conn->apsdq);
1274 spin_unlock_bh(&conn->psq_lock);
1275
1276 /*
1277 * Set the STA flag to Trigger delivery,
1278 * so that the frame will go out
1279 */
1280 conn->sta_flags |= STA_PS_APSD_TRIGGER;
1281 num_frames_to_deliver--;
1282
1283 /* Last frame in the service period, set EOSP or queue empty */
1284 if ((is_apsdq_empty) || (!num_frames_to_deliver))
1285 conn->sta_flags |= STA_PS_APSD_EOSP;
1286
1287 ath6kl_data_tx(skb, vif->ndev);
1288 conn->sta_flags &= ~(STA_PS_APSD_TRIGGER);
1289 conn->sta_flags &= ~(STA_PS_APSD_EOSP);
1290 }
1291
1292 if (is_apsdq_empty) {
1293 if (is_apsdq_empty_at_start)
1294 flags = WMI_AP_APSD_NO_DELIVERY_FRAMES;
1295 else
1296 flags = 0;
1297
1298 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi,
1299 vif->fw_vif_idx,
1300 conn->aid, 0, flags);
1301 }
1302
1303 return;
1304 }
1305
1306 void ath6kl_rx(struct htc_target *target, struct htc_packet *packet)
1307 {
1308 struct ath6kl *ar = target->dev->ar;
1309 struct sk_buff *skb = packet->pkt_cntxt;
1310 struct wmi_rx_meta_v2 *meta;
1311 struct wmi_data_hdr *dhdr;
1312 int min_hdr_len;
1313 u8 meta_type, dot11_hdr = 0;
1314 u8 pad_before_data_start;
1315 int status = packet->status;
1316 enum htc_endpoint_id ept = packet->endpoint;
1317 bool is_amsdu, prev_ps, ps_state = false;
1318 bool trig_state = false;
1319 struct ath6kl_sta *conn = NULL;
1320 struct sk_buff *skb1 = NULL;
1321 struct ethhdr *datap = NULL;
1322 struct ath6kl_vif *vif;
1323 struct aggr_info_conn *aggr_conn;
1324 u16 seq_no, offset;
1325 u8 tid, if_idx;
1326
1327 ath6kl_dbg(ATH6KL_DBG_WLAN_RX,
1328 "%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d",
1329 __func__, ar, ept, skb, packet->buf,
1330 packet->act_len, status);
1331
1332 if (status || packet->act_len < HTC_HDR_LENGTH) {
1333 dev_kfree_skb(skb);
1334 return;
1335 }
1336
1337 skb_put(skb, packet->act_len + HTC_HDR_LENGTH);
1338 skb_pull(skb, HTC_HDR_LENGTH);
1339
1340 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "rx ",
1341 skb->data, skb->len);
1342
1343 if (ept == ar->ctrl_ep) {
1344 if (test_bit(WMI_ENABLED, &ar->flag)) {
1345 ath6kl_check_wow_status(ar);
1346 ath6kl_wmi_control_rx(ar->wmi, skb);
1347 return;
1348 }
1349 if_idx =
1350 wmi_cmd_hdr_get_if_idx((struct wmi_cmd_hdr *) skb->data);
1351 } else {
1352 if_idx =
1353 wmi_data_hdr_get_if_idx((struct wmi_data_hdr *) skb->data);
1354 }
1355
1356 vif = ath6kl_get_vif_by_index(ar, if_idx);
1357 if (!vif) {
1358 dev_kfree_skb(skb);
1359 return;
1360 }
1361
1362 /*
1363 * Take lock to protect buffer counts and adaptive power throughput
1364 * state.
1365 */
1366 spin_lock_bh(&vif->if_lock);
1367
1368 vif->net_stats.rx_packets++;
1369 vif->net_stats.rx_bytes += packet->act_len;
1370
1371 spin_unlock_bh(&vif->if_lock);
1372
1373 skb->dev = vif->ndev;
1374
1375 if (!test_bit(WMI_ENABLED, &ar->flag)) {
1376 if (EPPING_ALIGNMENT_PAD > 0)
1377 skb_pull(skb, EPPING_ALIGNMENT_PAD);
1378 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb);
1379 return;
1380 }
1381
1382 ath6kl_check_wow_status(ar);
1383
1384 min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) +
1385 sizeof(struct ath6kl_llc_snap_hdr);
1386
1387 dhdr = (struct wmi_data_hdr *) skb->data;
1388
1389 /*
1390 * In the case of AP mode we may receive NULL data frames
1391 * that do not have LLC hdr. They are 16 bytes in size.
1392 * Allow these frames in the AP mode.
1393 */
1394 if (vif->nw_type != AP_NETWORK &&
1395 ((packet->act_len < min_hdr_len) ||
1396 (packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) {
1397 ath6kl_info("frame len is too short or too long\n");
1398 vif->net_stats.rx_errors++;
1399 vif->net_stats.rx_length_errors++;
1400 dev_kfree_skb(skb);
1401 return;
1402 }
1403
1404 /* Get the Power save state of the STA */
1405 if (vif->nw_type == AP_NETWORK) {
1406 meta_type = wmi_data_hdr_get_meta(dhdr);
1407
1408 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) &
1409 WMI_DATA_HDR_PS_MASK);
1410
1411 offset = sizeof(struct wmi_data_hdr);
1412 trig_state = !!(le16_to_cpu(dhdr->info3) & WMI_DATA_HDR_TRIG);
1413
1414 switch (meta_type) {
1415 case 0:
1416 break;
1417 case WMI_META_VERSION_1:
1418 offset += sizeof(struct wmi_rx_meta_v1);
1419 break;
1420 case WMI_META_VERSION_2:
1421 offset += sizeof(struct wmi_rx_meta_v2);
1422 break;
1423 default:
1424 break;
1425 }
1426
1427 datap = (struct ethhdr *) (skb->data + offset);
1428 conn = ath6kl_find_sta(vif, datap->h_source);
1429
1430 if (!conn) {
1431 dev_kfree_skb(skb);
1432 return;
1433 }
1434
1435 /*
1436 * If there is a change in PS state of the STA,
1437 * take appropriate steps:
1438 *
1439 * 1. If Sleep-->Awake, flush the psq for the STA
1440 * Clear the PVB for the STA.
1441 * 2. If Awake-->Sleep, Starting queueing frames
1442 * the STA.
1443 */
1444 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP);
1445
1446 if (ps_state)
1447 conn->sta_flags |= STA_PS_SLEEP;
1448 else
1449 conn->sta_flags &= ~STA_PS_SLEEP;
1450
1451 /* Accept trigger only when the station is in sleep */
1452 if ((conn->sta_flags & STA_PS_SLEEP) && trig_state)
1453 ath6kl_uapsd_trigger_frame_rx(vif, conn);
1454
1455 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) {
1456 if (!(conn->sta_flags & STA_PS_SLEEP)) {
1457 struct sk_buff *skbuff = NULL;
1458 bool is_apsdq_empty;
1459 struct ath6kl_mgmt_buff *mgmt;
1460 u8 idx;
1461
1462 spin_lock_bh(&conn->psq_lock);
1463 while (conn->mgmt_psq_len > 0) {
1464 mgmt = list_first_entry(
1465 &conn->mgmt_psq,
1466 struct ath6kl_mgmt_buff,
1467 list);
1468 list_del(&mgmt->list);
1469 conn->mgmt_psq_len--;
1470 spin_unlock_bh(&conn->psq_lock);
1471 idx = vif->fw_vif_idx;
1472
1473 ath6kl_wmi_send_mgmt_cmd(ar->wmi,
1474 idx,
1475 mgmt->id,
1476 mgmt->freq,
1477 mgmt->wait,
1478 mgmt->buf,
1479 mgmt->len,
1480 mgmt->no_cck);
1481
1482 kfree(mgmt);
1483 spin_lock_bh(&conn->psq_lock);
1484 }
1485 conn->mgmt_psq_len = 0;
1486 while ((skbuff = skb_dequeue(&conn->psq))) {
1487 spin_unlock_bh(&conn->psq_lock);
1488 ath6kl_data_tx(skbuff, vif->ndev);
1489 spin_lock_bh(&conn->psq_lock);
1490 }
1491
1492 is_apsdq_empty = skb_queue_empty(&conn->apsdq);
1493 while ((skbuff = skb_dequeue(&conn->apsdq))) {
1494 spin_unlock_bh(&conn->psq_lock);
1495 ath6kl_data_tx(skbuff, vif->ndev);
1496 spin_lock_bh(&conn->psq_lock);
1497 }
1498 spin_unlock_bh(&conn->psq_lock);
1499
1500 if (!is_apsdq_empty)
1501 ath6kl_wmi_set_apsd_bfrd_traf(
1502 ar->wmi,
1503 vif->fw_vif_idx,
1504 conn->aid, 0, 0);
1505
1506 /* Clear the PVB for this STA */
1507 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1508 conn->aid, 0);
1509 }
1510 }
1511
1512 /* drop NULL data frames here */
1513 if ((packet->act_len < min_hdr_len) ||
1514 (packet->act_len >
1515 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) {
1516 dev_kfree_skb(skb);
1517 return;
1518 }
1519 }
1520
1521 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false;
1522 tid = wmi_data_hdr_get_up(dhdr);
1523 seq_no = wmi_data_hdr_get_seqno(dhdr);
1524 meta_type = wmi_data_hdr_get_meta(dhdr);
1525 dot11_hdr = wmi_data_hdr_get_dot11(dhdr);
1526 pad_before_data_start =
1527 (le16_to_cpu(dhdr->info3) >> WMI_DATA_HDR_PAD_BEFORE_DATA_SHIFT)
1528 & WMI_DATA_HDR_PAD_BEFORE_DATA_MASK;
1529
1530 skb_pull(skb, sizeof(struct wmi_data_hdr));
1531
1532 switch (meta_type) {
1533 case WMI_META_VERSION_1:
1534 skb_pull(skb, sizeof(struct wmi_rx_meta_v1));
1535 break;
1536 case WMI_META_VERSION_2:
1537 meta = (struct wmi_rx_meta_v2 *) skb->data;
1538 if (meta->csum_flags & 0x1) {
1539 skb->ip_summed = CHECKSUM_COMPLETE;
1540 skb->csum = (__force __wsum) meta->csum;
1541 }
1542 skb_pull(skb, sizeof(struct wmi_rx_meta_v2));
1543 break;
1544 default:
1545 break;
1546 }
1547
1548 skb_pull(skb, pad_before_data_start);
1549
1550 if (dot11_hdr)
1551 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb);
1552 else if (!is_amsdu)
1553 status = ath6kl_wmi_dot3_2_dix(skb);
1554
1555 if (status) {
1556 /*
1557 * Drop frames that could not be processed (lack of
1558 * memory, etc.)
1559 */
1560 dev_kfree_skb(skb);
1561 return;
1562 }
1563
1564 if (!(vif->ndev->flags & IFF_UP)) {
1565 dev_kfree_skb(skb);
1566 return;
1567 }
1568
1569 if (vif->nw_type == AP_NETWORK) {
1570 datap = (struct ethhdr *) skb->data;
1571 if (is_multicast_ether_addr(datap->h_dest))
1572 /*
1573 * Bcast/Mcast frames should be sent to the
1574 * OS stack as well as on the air.
1575 */
1576 skb1 = skb_copy(skb, GFP_ATOMIC);
1577 else {
1578 /*
1579 * Search for a connected STA with dstMac
1580 * as the Mac address. If found send the
1581 * frame to it on the air else send the
1582 * frame up the stack.
1583 */
1584 conn = ath6kl_find_sta(vif, datap->h_dest);
1585
1586 if (conn && ar->intra_bss) {
1587 skb1 = skb;
1588 skb = NULL;
1589 } else if (conn && !ar->intra_bss) {
1590 dev_kfree_skb(skb);
1591 skb = NULL;
1592 }
1593 }
1594 if (skb1)
1595 ath6kl_data_tx(skb1, vif->ndev);
1596
1597 if (skb == NULL) {
1598 /* nothing to deliver up the stack */
1599 return;
1600 }
1601 }
1602
1603 datap = (struct ethhdr *) skb->data;
1604
1605 if (is_unicast_ether_addr(datap->h_dest)) {
1606 if (vif->nw_type == AP_NETWORK) {
1607 conn = ath6kl_find_sta(vif, datap->h_source);
1608 if (!conn)
1609 return;
1610 aggr_conn = conn->aggr_conn;
1611 } else {
1612 aggr_conn = vif->aggr_cntxt->aggr_conn;
1613 }
1614
1615 if (aggr_process_recv_frm(aggr_conn, tid, seq_no,
1616 is_amsdu, skb)) {
1617 /* aggregation code will handle the skb */
1618 return;
1619 }
1620 } else if (!is_broadcast_ether_addr(datap->h_dest)) {
1621 vif->net_stats.multicast++;
1622 }
1623
1624 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb);
1625 }
1626
1627 static void aggr_timeout(unsigned long arg)
1628 {
1629 u8 i, j;
1630 struct aggr_info_conn *aggr_conn = (struct aggr_info_conn *) arg;
1631 struct rxtid *rxtid;
1632 struct rxtid_stats *stats;
1633
1634 for (i = 0; i < NUM_OF_TIDS; i++) {
1635 rxtid = &aggr_conn->rx_tid[i];
1636 stats = &aggr_conn->stat[i];
1637
1638 if (!rxtid->aggr || !rxtid->timer_mon)
1639 continue;
1640
1641 stats->num_timeouts++;
1642 ath6kl_dbg(ATH6KL_DBG_AGGR,
1643 "aggr timeout (st %d end %d)\n",
1644 rxtid->seq_next,
1645 ((rxtid->seq_next + rxtid->hold_q_sz-1) &
1646 ATH6KL_MAX_SEQ_NO));
1647 aggr_deque_frms(aggr_conn, i, 0, 0);
1648 }
1649
1650 aggr_conn->timer_scheduled = false;
1651
1652 for (i = 0; i < NUM_OF_TIDS; i++) {
1653 rxtid = &aggr_conn->rx_tid[i];
1654
1655 if (rxtid->aggr && rxtid->hold_q) {
1656 spin_lock_bh(&rxtid->lock);
1657 for (j = 0; j < rxtid->hold_q_sz; j++) {
1658 if (rxtid->hold_q[j].skb) {
1659 aggr_conn->timer_scheduled = true;
1660 rxtid->timer_mon = true;
1661 break;
1662 }
1663 }
1664 spin_unlock_bh(&rxtid->lock);
1665
1666 if (j >= rxtid->hold_q_sz)
1667 rxtid->timer_mon = false;
1668 }
1669 }
1670
1671 if (aggr_conn->timer_scheduled)
1672 mod_timer(&aggr_conn->timer,
1673 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT));
1674 }
1675
1676 static void aggr_delete_tid_state(struct aggr_info_conn *aggr_conn, u8 tid)
1677 {
1678 struct rxtid *rxtid;
1679 struct rxtid_stats *stats;
1680
1681 if (!aggr_conn || tid >= NUM_OF_TIDS)
1682 return;
1683
1684 rxtid = &aggr_conn->rx_tid[tid];
1685 stats = &aggr_conn->stat[tid];
1686
1687 if (rxtid->aggr)
1688 aggr_deque_frms(aggr_conn, tid, 0, 0);
1689
1690 rxtid->aggr = false;
1691 rxtid->timer_mon = false;
1692 rxtid->win_sz = 0;
1693 rxtid->seq_next = 0;
1694 rxtid->hold_q_sz = 0;
1695
1696 kfree(rxtid->hold_q);
1697 rxtid->hold_q = NULL;
1698
1699 memset(stats, 0, sizeof(struct rxtid_stats));
1700 }
1701
1702 void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid_mux, u16 seq_no,
1703 u8 win_sz)
1704 {
1705 struct ath6kl_sta *sta;
1706 struct aggr_info_conn *aggr_conn = NULL;
1707 struct rxtid *rxtid;
1708 struct rxtid_stats *stats;
1709 u16 hold_q_size;
1710 u8 tid, aid;
1711
1712 if (vif->nw_type == AP_NETWORK) {
1713 aid = ath6kl_get_aid(tid_mux);
1714 sta = ath6kl_find_sta_by_aid(vif->ar, aid);
1715 if (sta)
1716 aggr_conn = sta->aggr_conn;
1717 } else {
1718 aggr_conn = vif->aggr_cntxt->aggr_conn;
1719 }
1720
1721 if (!aggr_conn)
1722 return;
1723
1724 tid = ath6kl_get_tid(tid_mux);
1725 if (tid >= NUM_OF_TIDS)
1726 return;
1727
1728 rxtid = &aggr_conn->rx_tid[tid];
1729 stats = &aggr_conn->stat[tid];
1730
1731 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX)
1732 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n",
1733 __func__, win_sz, tid);
1734
1735 if (rxtid->aggr)
1736 aggr_delete_tid_state(aggr_conn, tid);
1737
1738 rxtid->seq_next = seq_no;
1739 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q);
1740 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL);
1741 if (!rxtid->hold_q)
1742 return;
1743
1744 rxtid->win_sz = win_sz;
1745 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz);
1746 if (!skb_queue_empty(&rxtid->q))
1747 return;
1748
1749 rxtid->aggr = true;
1750 }
1751
1752 void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info,
1753 struct aggr_info_conn *aggr_conn)
1754 {
1755 struct rxtid *rxtid;
1756 u8 i;
1757
1758 aggr_conn->aggr_sz = AGGR_SZ_DEFAULT;
1759 aggr_conn->dev = vif->ndev;
1760 init_timer(&aggr_conn->timer);
1761 aggr_conn->timer.function = aggr_timeout;
1762 aggr_conn->timer.data = (unsigned long) aggr_conn;
1763 aggr_conn->aggr_info = aggr_info;
1764
1765 aggr_conn->timer_scheduled = false;
1766
1767 for (i = 0; i < NUM_OF_TIDS; i++) {
1768 rxtid = &aggr_conn->rx_tid[i];
1769 rxtid->aggr = false;
1770 rxtid->timer_mon = false;
1771 skb_queue_head_init(&rxtid->q);
1772 spin_lock_init(&rxtid->lock);
1773 }
1774 }
1775
1776 struct aggr_info *aggr_init(struct ath6kl_vif *vif)
1777 {
1778 struct aggr_info *p_aggr = NULL;
1779
1780 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL);
1781 if (!p_aggr) {
1782 ath6kl_err("failed to alloc memory for aggr_node\n");
1783 return NULL;
1784 }
1785
1786 p_aggr->aggr_conn = kzalloc(sizeof(struct aggr_info_conn), GFP_KERNEL);
1787 if (!p_aggr->aggr_conn) {
1788 ath6kl_err("failed to alloc memory for connection specific aggr info\n");
1789 kfree(p_aggr);
1790 return NULL;
1791 }
1792
1793 aggr_conn_init(vif, p_aggr, p_aggr->aggr_conn);
1794
1795 skb_queue_head_init(&p_aggr->rx_amsdu_freeq);
1796 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, AGGR_NUM_OF_FREE_NETBUFS);
1797
1798 return p_aggr;
1799 }
1800
1801 void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid_mux)
1802 {
1803 struct ath6kl_sta *sta;
1804 struct rxtid *rxtid;
1805 struct aggr_info_conn *aggr_conn = NULL;
1806 u8 tid, aid;
1807
1808 if (vif->nw_type == AP_NETWORK) {
1809 aid = ath6kl_get_aid(tid_mux);
1810 sta = ath6kl_find_sta_by_aid(vif->ar, aid);
1811 if (sta)
1812 aggr_conn = sta->aggr_conn;
1813 } else {
1814 aggr_conn = vif->aggr_cntxt->aggr_conn;
1815 }
1816
1817 if (!aggr_conn)
1818 return;
1819
1820 tid = ath6kl_get_tid(tid_mux);
1821 if (tid >= NUM_OF_TIDS)
1822 return;
1823
1824 rxtid = &aggr_conn->rx_tid[tid];
1825
1826 if (rxtid->aggr)
1827 aggr_delete_tid_state(aggr_conn, tid);
1828 }
1829
1830 void aggr_reset_state(struct aggr_info_conn *aggr_conn)
1831 {
1832 u8 tid;
1833
1834 if (!aggr_conn)
1835 return;
1836
1837 if (aggr_conn->timer_scheduled) {
1838 del_timer(&aggr_conn->timer);
1839 aggr_conn->timer_scheduled = false;
1840 }
1841
1842 for (tid = 0; tid < NUM_OF_TIDS; tid++)
1843 aggr_delete_tid_state(aggr_conn, tid);
1844 }
1845
1846 /* clean up our amsdu buffer list */
1847 void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar)
1848 {
1849 struct htc_packet *packet, *tmp_pkt;
1850
1851 spin_lock_bh(&ar->lock);
1852 if (list_empty(&ar->amsdu_rx_buffer_queue)) {
1853 spin_unlock_bh(&ar->lock);
1854 return;
1855 }
1856
1857 list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue,
1858 list) {
1859 list_del(&packet->list);
1860 spin_unlock_bh(&ar->lock);
1861 dev_kfree_skb(packet->pkt_cntxt);
1862 spin_lock_bh(&ar->lock);
1863 }
1864
1865 spin_unlock_bh(&ar->lock);
1866 }
1867
1868 void aggr_module_destroy(struct aggr_info *aggr_info)
1869 {
1870 if (!aggr_info)
1871 return;
1872
1873 aggr_reset_state(aggr_info->aggr_conn);
1874 skb_queue_purge(&aggr_info->rx_amsdu_freeq);
1875 kfree(aggr_info->aggr_conn);
1876 kfree(aggr_info);
1877 }
Linux with added FPC-III support