2 * Copyright (c) 2004-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
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.
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.
22 * tid - tid_mux0..tid_mux3
23 * aid - tid_mux4..tid_mux7
25 #define ATH6KL_TID_MASK 0xf
26 #define ATH6KL_AID_SHIFT 4
28 static inline u8 ath6kl_get_tid(u8 tid_mux)
30 return tid_mux & ATH6KL_TID_MASK;
33 static inline u8 ath6kl_get_aid(u8 tid_mux)
35 return tid_mux >> ATH6KL_AID_SHIFT;
38 static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev,
41 struct ath6kl *ar = ath6kl_priv(dev);
42 struct ethhdr *eth_hdr;
48 eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr));
50 if (is_multicast_ether_addr(eth_hdr->h_dest))
53 for (i = 0; i < ar->node_num; i++) {
54 if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr,
57 ar->node_map[i].tx_pend++;
58 return ar->node_map[i].ep_id;
61 if ((ep_map == -1) && !ar->node_map[i].tx_pend)
66 ep_map = ar->node_num;
68 if (ar->node_num > MAX_NODE_NUM)
69 return ENDPOINT_UNUSED;
72 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN);
74 for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) {
75 if (!ar->tx_pending[i]) {
76 ar->node_map[ep_map].ep_id = i;
81 * No free endpoint is available, start redistribution on
82 * the inuse endpoints.
84 if (i == ENDPOINT_5) {
85 ar->node_map[ep_map].ep_id = ar->next_ep_id;
87 if (ar->next_ep_id > ENDPOINT_5)
88 ar->next_ep_id = ENDPOINT_2;
93 ar->node_map[ep_map].tx_pend++;
95 return ar->node_map[ep_map].ep_id;
98 static bool ath6kl_process_uapsdq(struct ath6kl_sta *conn,
99 struct ath6kl_vif *vif,
103 struct ath6kl *ar = vif->ar;
104 bool is_apsdq_empty = false;
105 struct ethhdr *datap = (struct ethhdr *) skb->data;
106 u8 up = 0, traffic_class, *ip_hdr;
108 struct ath6kl_llc_snap_hdr *llc_hdr;
110 if (conn->sta_flags & STA_PS_APSD_TRIGGER) {
112 * This tx is because of a uAPSD trigger, determine
113 * more and EOSP bit. Set EOSP if queue is empty
114 * or sufficient frames are delivered for this trigger.
116 spin_lock_bh(&conn->psq_lock);
117 if (!skb_queue_empty(&conn->apsdq))
118 *flags |= WMI_DATA_HDR_FLAGS_MORE;
119 else if (conn->sta_flags & STA_PS_APSD_EOSP)
120 *flags |= WMI_DATA_HDR_FLAGS_EOSP;
121 *flags |= WMI_DATA_HDR_FLAGS_UAPSD;
122 spin_unlock_bh(&conn->psq_lock);
124 } else if (!conn->apsd_info)
127 if (test_bit(WMM_ENABLED, &vif->flags)) {
128 ether_type = be16_to_cpu(datap->h_proto);
129 if (is_ethertype(ether_type)) {
130 /* packet is in DIX format */
131 ip_hdr = (u8 *)(datap + 1);
133 /* packet is in 802.3 format */
134 llc_hdr = (struct ath6kl_llc_snap_hdr *)
136 ether_type = be16_to_cpu(llc_hdr->eth_type);
137 ip_hdr = (u8 *)(llc_hdr + 1);
140 if (ether_type == IP_ETHERTYPE)
141 up = ath6kl_wmi_determine_user_priority(
145 traffic_class = ath6kl_wmi_get_traffic_class(up);
147 if ((conn->apsd_info & (1 << traffic_class)) == 0)
150 /* Queue the frames if the STA is sleeping */
151 spin_lock_bh(&conn->psq_lock);
152 is_apsdq_empty = skb_queue_empty(&conn->apsdq);
153 skb_queue_tail(&conn->apsdq, skb);
154 spin_unlock_bh(&conn->psq_lock);
157 * If this is the first pkt getting queued
158 * for this STA, update the PVB for this STA
160 if (is_apsdq_empty) {
161 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi,
165 *flags |= WMI_DATA_HDR_FLAGS_UAPSD;
170 static bool ath6kl_process_psq(struct ath6kl_sta *conn,
171 struct ath6kl_vif *vif,
175 bool is_psq_empty = false;
176 struct ath6kl *ar = vif->ar;
178 if (conn->sta_flags & STA_PS_POLLED) {
179 spin_lock_bh(&conn->psq_lock);
180 if (!skb_queue_empty(&conn->psq))
181 *flags |= WMI_DATA_HDR_FLAGS_MORE;
182 spin_unlock_bh(&conn->psq_lock);
186 /* Queue the frames if the STA is sleeping */
187 spin_lock_bh(&conn->psq_lock);
188 is_psq_empty = skb_queue_empty(&conn->psq);
189 skb_queue_tail(&conn->psq, skb);
190 spin_unlock_bh(&conn->psq_lock);
193 * If this is the first pkt getting queued
194 * for this STA, update the PVB for this
198 ath6kl_wmi_set_pvb_cmd(ar->wmi,
204 static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb,
207 struct ethhdr *datap = (struct ethhdr *) skb->data;
208 struct ath6kl_sta *conn = NULL;
209 bool ps_queued = false;
210 struct ath6kl *ar = vif->ar;
212 if (is_multicast_ether_addr(datap->h_dest)) {
214 bool q_mcast = false;
216 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
217 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) {
225 * If this transmit is not because of a Dtim Expiry
228 if (!test_bit(DTIM_EXPIRED, &vif->flags)) {
229 bool is_mcastq_empty = false;
231 spin_lock_bh(&ar->mcastpsq_lock);
233 skb_queue_empty(&ar->mcastpsq);
234 skb_queue_tail(&ar->mcastpsq, skb);
235 spin_unlock_bh(&ar->mcastpsq_lock);
238 * If this is the first Mcast pkt getting
239 * queued indicate to the target to set the
240 * BitmapControl LSB of the TIM IE.
243 ath6kl_wmi_set_pvb_cmd(ar->wmi,
250 * This transmit is because of Dtim expiry.
251 * Determine if MoreData bit has to be set.
253 spin_lock_bh(&ar->mcastpsq_lock);
254 if (!skb_queue_empty(&ar->mcastpsq))
255 *flags |= WMI_DATA_HDR_FLAGS_MORE;
256 spin_unlock_bh(&ar->mcastpsq_lock);
260 conn = ath6kl_find_sta(vif, datap->h_dest);
264 /* Inform the caller that the skb is consumed */
268 if (conn->sta_flags & STA_PS_SLEEP) {
269 ps_queued = ath6kl_process_uapsdq(conn,
271 if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD))
272 ps_queued = ath6kl_process_psq(conn,
281 int ath6kl_control_tx(void *devt, struct sk_buff *skb,
282 enum htc_endpoint_id eid)
284 struct ath6kl *ar = devt;
286 struct ath6kl_cookie *cookie = NULL;
288 if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW))
291 spin_lock_bh(&ar->lock);
293 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
294 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__,
297 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) {
299 * Control endpoint is full, don't allocate resources, we
300 * are just going to drop this packet.
303 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n",
306 cookie = ath6kl_alloc_cookie(ar);
308 if (cookie == NULL) {
309 spin_unlock_bh(&ar->lock);
314 ar->tx_pending[eid]++;
316 if (eid != ar->ctrl_ep)
317 ar->total_tx_data_pend++;
319 spin_unlock_bh(&ar->lock);
323 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
324 eid, ATH6KL_CONTROL_PKT_TAG);
325 cookie->htc_pkt.skb = skb;
328 * This interface is asynchronous, if there is an error, cleanup
329 * will happen in the TX completion callback.
331 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
340 int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev)
342 struct ath6kl *ar = ath6kl_priv(dev);
343 struct ath6kl_cookie *cookie = NULL;
344 enum htc_endpoint_id eid = ENDPOINT_UNUSED;
345 struct ath6kl_vif *vif = netdev_priv(dev);
347 u16 htc_tag = ATH6KL_DATA_PKT_TAG;
348 u8 ac = 99 ; /* initialize to unmapped ac */
349 bool chk_adhoc_ps_mapping = false;
351 struct wmi_tx_meta_v2 meta_v2;
353 u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed;
357 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
358 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__,
359 skb, skb->data, skb->len);
361 /* If target is not associated */
362 if (!test_bit(CONNECTED, &vif->flags)) {
367 if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON)) {
372 if (!test_bit(WMI_READY, &ar->flag))
375 /* AP mode Power saving processing */
376 if (vif->nw_type == AP_NETWORK) {
377 if (ath6kl_powersave_ap(vif, skb, &flags))
381 if (test_bit(WMI_ENABLED, &ar->flag)) {
382 if ((dev->features & NETIF_F_IP_CSUM) &&
383 (csum == CHECKSUM_PARTIAL)) {
384 csum_start = skb->csum_start -
385 (skb_network_header(skb) - skb->head) +
386 sizeof(struct ath6kl_llc_snap_hdr);
387 csum_dest = skb->csum_offset + csum_start;
390 if (skb_headroom(skb) < dev->needed_headroom) {
391 struct sk_buff *tmp_skb = skb;
393 skb = skb_realloc_headroom(skb, dev->needed_headroom);
396 vif->net_stats.tx_dropped++;
401 if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) {
402 ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n");
406 if ((dev->features & NETIF_F_IP_CSUM) &&
407 (csum == CHECKSUM_PARTIAL)) {
408 meta_v2.csum_start = csum_start;
409 meta_v2.csum_dest = csum_dest;
411 /* instruct target to calculate checksum */
412 meta_v2.csum_flags = WMI_META_V2_FLAG_CSUM_OFFLOAD;
413 meta_ver = WMI_META_VERSION_2;
420 ret = ath6kl_wmi_data_hdr_add(ar->wmi, skb,
421 DATA_MSGTYPE, flags, 0,
423 meta, vif->fw_vif_idx);
426 ath6kl_warn("failed to add wmi data header:%d\n"
431 if ((vif->nw_type == ADHOC_NETWORK) &&
432 ar->ibss_ps_enable && test_bit(CONNECTED, &vif->flags))
433 chk_adhoc_ps_mapping = true;
435 /* get the stream mapping */
436 ret = ath6kl_wmi_implicit_create_pstream(ar->wmi,
437 vif->fw_vif_idx, skb,
438 0, test_bit(WMM_ENABLED, &vif->flags), &ac);
445 spin_lock_bh(&ar->lock);
447 if (chk_adhoc_ps_mapping)
448 eid = ath6kl_ibss_map_epid(skb, dev, &map_no);
450 eid = ar->ac2ep_map[ac];
452 if (eid == 0 || eid == ENDPOINT_UNUSED) {
453 ath6kl_err("eid %d is not mapped!\n", eid);
454 spin_unlock_bh(&ar->lock);
458 /* allocate resource for this packet */
459 cookie = ath6kl_alloc_cookie(ar);
462 spin_unlock_bh(&ar->lock);
466 /* update counts while the lock is held */
467 ar->tx_pending[eid]++;
468 ar->total_tx_data_pend++;
470 spin_unlock_bh(&ar->lock);
472 if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) &&
475 * We will touch (move the buffer data to align it. Since the
476 * skb buffer is cloned and not only the header is changed, we
477 * have to copy it to allow the changes. Since we are copying
478 * the data here, we may as well align it by reserving suitable
479 * headroom to avoid the memmove in ath6kl_htc_tx_buf_align().
481 struct sk_buff *nskb;
483 nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC);
491 cookie->map_no = map_no;
492 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
494 cookie->htc_pkt.skb = skb;
496 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ",
497 skb->data, skb->len);
500 * HTC interface is asynchronous, if this fails, cleanup will
501 * happen in the ath6kl_tx_complete callback.
503 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
510 vif->net_stats.tx_dropped++;
511 vif->net_stats.tx_aborted_errors++;
516 /* indicate tx activity or inactivity on a WMI stream */
517 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active)
519 struct ath6kl *ar = devt;
520 enum htc_endpoint_id eid;
523 eid = ar->ac2ep_map[traffic_class];
525 if (!test_bit(WMI_ENABLED, &ar->flag))
528 spin_lock_bh(&ar->lock);
530 ar->ac_stream_active[traffic_class] = active;
534 * Keep track of the active stream with the highest
537 if (ar->ac_stream_pri_map[traffic_class] >
538 ar->hiac_stream_active_pri)
539 /* set the new highest active priority */
540 ar->hiac_stream_active_pri =
541 ar->ac_stream_pri_map[traffic_class];
545 * We may have to search for the next active stream
546 * that is the highest priority.
548 if (ar->hiac_stream_active_pri ==
549 ar->ac_stream_pri_map[traffic_class]) {
551 * The highest priority stream just went inactive
552 * reset and search for the "next" highest "active"
555 ar->hiac_stream_active_pri = 0;
557 for (i = 0; i < WMM_NUM_AC; i++) {
558 if (ar->ac_stream_active[i] &&
559 (ar->ac_stream_pri_map[i] >
560 ar->hiac_stream_active_pri))
562 * Set the new highest active
565 ar->hiac_stream_active_pri =
566 ar->ac_stream_pri_map[i];
571 spin_unlock_bh(&ar->lock);
574 /* notify HTC, this may cause credit distribution changes */
575 ath6kl_htc_indicate_activity_change(ar->htc_target, eid, active);
578 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target,
579 struct htc_packet *packet)
581 struct ath6kl *ar = target->dev->ar;
582 struct ath6kl_vif *vif;
583 enum htc_endpoint_id endpoint = packet->endpoint;
584 enum htc_send_full_action action = HTC_SEND_FULL_KEEP;
586 if (endpoint == ar->ctrl_ep) {
588 * Under normal WMI if this is getting full, then something
589 * is running rampant the host should not be exhausting the
590 * WMI queue with too many commands the only exception to
591 * this is during testing using endpointping.
593 set_bit(WMI_CTRL_EP_FULL, &ar->flag);
594 ath6kl_err("wmi ctrl ep is full\n");
598 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG)
602 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for
603 * the highest active stream.
605 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] <
606 ar->hiac_stream_active_pri &&
608 target->endpoint[endpoint].tx_drop_packet_threshold)
610 * Give preference to the highest priority stream by
611 * dropping the packets which overflowed.
613 action = HTC_SEND_FULL_DROP;
616 spin_lock_bh(&ar->list_lock);
617 list_for_each_entry(vif, &ar->vif_list, list) {
618 if (vif->nw_type == ADHOC_NETWORK ||
619 action != HTC_SEND_FULL_DROP) {
620 spin_unlock_bh(&ar->list_lock);
622 set_bit(NETQ_STOPPED, &vif->flags);
623 netif_stop_queue(vif->ndev);
628 spin_unlock_bh(&ar->list_lock);
633 /* TODO this needs to be looked at */
634 static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif,
635 enum htc_endpoint_id eid, u32 map_no)
637 struct ath6kl *ar = vif->ar;
640 if (vif->nw_type != ADHOC_NETWORK)
643 if (!ar->ibss_ps_enable)
646 if (eid == ar->ctrl_ep)
653 ar->node_map[map_no].tx_pend--;
655 if (ar->node_map[map_no].tx_pend)
658 if (map_no != (ar->node_num - 1))
661 for (i = ar->node_num; i > 0; i--) {
662 if (ar->node_map[i - 1].tx_pend)
665 memset(&ar->node_map[i - 1], 0,
666 sizeof(struct ath6kl_node_mapping));
671 void ath6kl_tx_complete(struct htc_target *target,
672 struct list_head *packet_queue)
674 struct ath6kl *ar = target->dev->ar;
675 struct sk_buff_head skb_queue;
676 struct htc_packet *packet;
678 struct ath6kl_cookie *ath6kl_cookie;
681 enum htc_endpoint_id eid;
682 bool wake_event = false;
683 bool flushing[ATH6KL_VIF_MAX] = {false};
685 struct ath6kl_vif *vif;
687 skb_queue_head_init(&skb_queue);
689 /* lock the driver as we update internal state */
690 spin_lock_bh(&ar->lock);
692 /* reap completed packets */
693 while (!list_empty(packet_queue)) {
695 packet = list_first_entry(packet_queue, struct htc_packet,
697 list_del(&packet->list);
699 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt;
703 status = packet->status;
704 skb = ath6kl_cookie->skb;
705 eid = packet->endpoint;
706 map_no = ath6kl_cookie->map_no;
708 if (!skb || !skb->data)
711 __skb_queue_tail(&skb_queue, skb);
713 if (!status && (packet->act_len != skb->len))
716 ar->tx_pending[eid]--;
718 if (eid != ar->ctrl_ep)
719 ar->total_tx_data_pend--;
721 if (eid == ar->ctrl_ep) {
722 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag))
723 clear_bit(WMI_CTRL_EP_FULL, &ar->flag);
725 if (ar->tx_pending[eid] == 0)
729 if (eid == ar->ctrl_ep) {
730 if_idx = wmi_cmd_hdr_get_if_idx(
731 (struct wmi_cmd_hdr *) packet->buf);
733 if_idx = wmi_data_hdr_get_if_idx(
734 (struct wmi_data_hdr *) packet->buf);
737 vif = ath6kl_get_vif_by_index(ar, if_idx);
739 ath6kl_free_cookie(ar, ath6kl_cookie);
744 if (status == -ECANCELED)
745 /* a packet was flushed */
746 flushing[if_idx] = true;
748 vif->net_stats.tx_errors++;
750 if (status != -ENOSPC && status != -ECANCELED)
751 ath6kl_warn("tx complete error: %d\n", status);
753 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
754 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
755 __func__, skb, packet->buf, packet->act_len,
758 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
759 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
760 __func__, skb, packet->buf, packet->act_len,
763 flushing[if_idx] = false;
764 vif->net_stats.tx_packets++;
765 vif->net_stats.tx_bytes += skb->len;
768 ath6kl_tx_clear_node_map(vif, eid, map_no);
770 ath6kl_free_cookie(ar, ath6kl_cookie);
772 if (test_bit(NETQ_STOPPED, &vif->flags))
773 clear_bit(NETQ_STOPPED, &vif->flags);
776 spin_unlock_bh(&ar->lock);
778 __skb_queue_purge(&skb_queue);
781 spin_lock_bh(&ar->list_lock);
782 list_for_each_entry(vif, &ar->vif_list, list) {
783 if (test_bit(CONNECTED, &vif->flags) &&
784 !flushing[vif->fw_vif_idx]) {
785 spin_unlock_bh(&ar->list_lock);
786 netif_wake_queue(vif->ndev);
787 spin_lock_bh(&ar->list_lock);
790 spin_unlock_bh(&ar->list_lock);
793 wake_up(&ar->event_wq);
799 spin_unlock_bh(&ar->lock);
803 void ath6kl_tx_data_cleanup(struct ath6kl *ar)
807 /* flush all the data (non-control) streams */
808 for (i = 0; i < WMM_NUM_AC; i++)
809 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i],
810 ATH6KL_DATA_PKT_TAG);
815 static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev,
823 if (!(skb->dev->flags & IFF_UP)) {
828 skb->protocol = eth_type_trans(skb, skb->dev);
833 static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num)
838 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
840 ath6kl_err("netbuf allocation failed\n");
843 skb_queue_tail(q, skb);
848 static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr)
850 struct sk_buff *skb = NULL;
852 if (skb_queue_len(&p_aggr->rx_amsdu_freeq) <
853 (AGGR_NUM_OF_FREE_NETBUFS >> 2))
854 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq,
855 AGGR_NUM_OF_FREE_NETBUFS);
857 skb = skb_dequeue(&p_aggr->rx_amsdu_freeq);
862 void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint)
864 struct ath6kl *ar = target->dev->ar;
868 struct htc_packet *packet;
869 struct list_head queue;
871 n_buf_refill = ATH6KL_MAX_RX_BUFFERS -
872 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint);
874 if (n_buf_refill <= 0)
877 INIT_LIST_HEAD(&queue);
879 ath6kl_dbg(ATH6KL_DBG_WLAN_RX,
880 "%s: providing htc with %d buffers at eid=%d\n",
881 __func__, n_buf_refill, endpoint);
883 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) {
884 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
888 packet = (struct htc_packet *) skb->head;
889 if (!IS_ALIGNED((unsigned long) skb->data, 4))
890 skb->data = PTR_ALIGN(skb->data - 4, 4);
891 set_htc_rxpkt_info(packet, skb, skb->data,
892 ATH6KL_BUFFER_SIZE, endpoint);
894 list_add_tail(&packet->list, &queue);
897 if (!list_empty(&queue))
898 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue);
901 void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count)
903 struct htc_packet *packet;
907 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE);
911 packet = (struct htc_packet *) skb->head;
912 if (!IS_ALIGNED((unsigned long) skb->data, 4))
913 skb->data = PTR_ALIGN(skb->data - 4, 4);
914 set_htc_rxpkt_info(packet, skb, skb->data,
915 ATH6KL_AMSDU_BUFFER_SIZE, 0);
918 spin_lock_bh(&ar->lock);
919 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue);
920 spin_unlock_bh(&ar->lock);
926 * Callback to allocate a receive buffer for a pending packet. We use a
927 * pre-allocated list of buffers of maximum AMSDU size (4K).
929 struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target,
930 enum htc_endpoint_id endpoint,
933 struct ath6kl *ar = target->dev->ar;
934 struct htc_packet *packet = NULL;
935 struct list_head *pkt_pos;
936 int refill_cnt = 0, depth = 0;
938 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n",
939 __func__, endpoint, len);
941 if ((len <= ATH6KL_BUFFER_SIZE) ||
942 (len > ATH6KL_AMSDU_BUFFER_SIZE))
945 spin_lock_bh(&ar->lock);
947 if (list_empty(&ar->amsdu_rx_buffer_queue)) {
948 spin_unlock_bh(&ar->lock);
949 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS;
953 packet = list_first_entry(&ar->amsdu_rx_buffer_queue,
954 struct htc_packet, list);
955 list_del(&packet->list);
956 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue)
959 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth;
960 spin_unlock_bh(&ar->lock);
962 /* set actual endpoint ID */
963 packet->endpoint = endpoint;
966 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD)
967 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt);
972 static void aggr_slice_amsdu(struct aggr_info *p_aggr,
973 struct rxtid *rxtid, struct sk_buff *skb)
975 struct sk_buff *new_skb;
977 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len;
980 mac_hdr_len = sizeof(struct ethhdr);
981 framep = skb->data + mac_hdr_len;
982 amsdu_len = skb->len - mac_hdr_len;
984 while (amsdu_len > mac_hdr_len) {
985 hdr = (struct ethhdr *) framep;
986 payload_8023_len = ntohs(hdr->h_proto);
988 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN ||
989 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) {
990 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n",
995 frame_8023_len = payload_8023_len + mac_hdr_len;
996 new_skb = aggr_get_free_skb(p_aggr);
998 ath6kl_err("no buffer available\n");
1002 memcpy(new_skb->data, framep, frame_8023_len);
1003 skb_put(new_skb, frame_8023_len);
1004 if (ath6kl_wmi_dot3_2_dix(new_skb)) {
1005 ath6kl_err("dot3_2_dix error\n");
1006 dev_kfree_skb(new_skb);
1010 skb_queue_tail(&rxtid->q, new_skb);
1012 /* Is this the last subframe within this aggregate ? */
1013 if ((amsdu_len - frame_8023_len) == 0)
1016 /* Add the length of A-MSDU subframe padding bytes -
1017 * Round to nearest word.
1019 frame_8023_len = ALIGN(frame_8023_len, 4);
1021 framep += frame_8023_len;
1022 amsdu_len -= frame_8023_len;
1028 static void aggr_deque_frms(struct aggr_info_conn *agg_conn, u8 tid,
1029 u16 seq_no, u8 order)
1031 struct sk_buff *skb;
1032 struct rxtid *rxtid;
1033 struct skb_hold_q *node;
1034 u16 idx, idx_end, seq_end;
1035 struct rxtid_stats *stats;
1037 rxtid = &agg_conn->rx_tid[tid];
1038 stats = &agg_conn->stat[tid];
1040 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
1043 * idx_end is typically the last possible frame in the window,
1044 * but changes to 'the' seq_no, when BAR comes. If seq_no
1045 * is non-zero, we will go up to that and stop.
1046 * Note: last seq no in current window will occupy the same
1047 * index position as index that is just previous to start.
1048 * An imp point : if win_sz is 7, for seq_no space of 4095,
1049 * then, there would be holes when sequence wrap around occurs.
1050 * Target should judiciously choose the win_sz, based on
1051 * this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz
1052 * 2, 4, 8, 16 win_sz works fine).
1053 * We must deque from "idx" to "idx_end", including both.
1055 seq_end = seq_no ? seq_no : rxtid->seq_next;
1056 idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz);
1058 spin_lock_bh(&rxtid->lock);
1061 node = &rxtid->hold_q[idx];
1062 if ((order == 1) && (!node->skb))
1067 aggr_slice_amsdu(agg_conn->aggr_info, rxtid,
1070 skb_queue_tail(&rxtid->q, node->skb);
1075 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next);
1076 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
1077 } while (idx != idx_end);
1079 spin_unlock_bh(&rxtid->lock);
1081 stats->num_delivered += skb_queue_len(&rxtid->q);
1083 while ((skb = skb_dequeue(&rxtid->q)))
1084 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, skb);
1087 static bool aggr_process_recv_frm(struct aggr_info_conn *agg_conn, u8 tid,
1089 bool is_amsdu, struct sk_buff *frame)
1091 struct rxtid *rxtid;
1092 struct rxtid_stats *stats;
1093 struct sk_buff *skb;
1094 struct skb_hold_q *node;
1095 u16 idx, st, cur, end;
1096 bool is_queued = false;
1099 rxtid = &agg_conn->rx_tid[tid];
1100 stats = &agg_conn->stat[tid];
1102 stats->num_into_aggr++;
1106 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, frame);
1109 while ((skb = skb_dequeue(&rxtid->q)))
1110 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev,
1116 /* Check the incoming sequence no, if it's in the window */
1117 st = rxtid->seq_next;
1119 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO;
1121 if (((st < end) && (cur < st || cur > end)) ||
1122 ((st > end) && (cur > end) && (cur < st))) {
1123 extended_end = (end + rxtid->hold_q_sz - 1) &
1126 if (((end < extended_end) &&
1127 (cur < end || cur > extended_end)) ||
1128 ((end > extended_end) && (cur > extended_end) &&
1130 aggr_deque_frms(agg_conn, tid, 0, 0);
1131 if (cur >= rxtid->hold_q_sz - 1)
1132 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1);
1134 rxtid->seq_next = ATH6KL_MAX_SEQ_NO -
1135 (rxtid->hold_q_sz - 2 - cur);
1138 * Dequeue only those frames that are outside the
1139 * new shifted window.
1141 if (cur >= rxtid->hold_q_sz - 1)
1142 st = cur - (rxtid->hold_q_sz - 1);
1144 st = ATH6KL_MAX_SEQ_NO -
1145 (rxtid->hold_q_sz - 2 - cur);
1147 aggr_deque_frms(agg_conn, tid, st, 0);
1153 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz);
1155 node = &rxtid->hold_q[idx];
1157 spin_lock_bh(&rxtid->lock);
1160 * Is the cur frame duplicate or something beyond our window(hold_q
1161 * -> which is 2x, already)?
1163 * 1. Duplicate is easy - drop incoming frame.
1164 * 2. Not falling in current sliding window.
1165 * 2a. is the frame_seq_no preceding current tid_seq_no?
1166 * -> drop the frame. perhaps sender did not get our ACK.
1167 * this is taken care of above.
1168 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ);
1169 * -> Taken care of it above, by moving window forward.
1171 dev_kfree_skb(node->skb);
1176 node->is_amsdu = is_amsdu;
1177 node->seq_no = seq_no;
1184 spin_unlock_bh(&rxtid->lock);
1186 aggr_deque_frms(agg_conn, tid, 0, 1);
1188 if (agg_conn->timer_scheduled)
1189 rxtid->progress = true;
1191 for (idx = 0 ; idx < rxtid->hold_q_sz; idx++) {
1192 if (rxtid->hold_q[idx].skb) {
1194 * There is a frame in the queue and no
1195 * timer so start a timer to ensure that
1196 * the frame doesn't remain stuck
1199 agg_conn->timer_scheduled = true;
1200 mod_timer(&agg_conn->timer,
1202 HZ * (AGGR_RX_TIMEOUT) / 1000));
1203 rxtid->progress = false;
1204 rxtid->timer_mon = true;
1212 static void ath6kl_uapsd_trigger_frame_rx(struct ath6kl_vif *vif,
1213 struct ath6kl_sta *conn)
1215 struct ath6kl *ar = vif->ar;
1216 bool is_apsdq_empty, is_apsdq_empty_at_start;
1217 u32 num_frames_to_deliver, flags;
1218 struct sk_buff *skb = NULL;
1221 * If the APSD q for this STA is not empty, dequeue and
1222 * send a pkt from the head of the q. Also update the
1223 * More data bit in the WMI_DATA_HDR if there are
1224 * more pkts for this STA in the APSD q.
1225 * If there are no more pkts for this STA,
1226 * update the APSD bitmap for this STA.
1229 num_frames_to_deliver = (conn->apsd_info >> ATH6KL_APSD_NUM_OF_AC) &
1230 ATH6KL_APSD_FRAME_MASK;
1232 * Number of frames to send in a service period is
1233 * indicated by the station
1234 * in the QOS_INFO of the association request
1235 * If it is zero, send all frames
1237 if (!num_frames_to_deliver)
1238 num_frames_to_deliver = ATH6KL_APSD_ALL_FRAME;
1240 spin_lock_bh(&conn->psq_lock);
1241 is_apsdq_empty = skb_queue_empty(&conn->apsdq);
1242 spin_unlock_bh(&conn->psq_lock);
1243 is_apsdq_empty_at_start = is_apsdq_empty;
1245 while ((!is_apsdq_empty) && (num_frames_to_deliver)) {
1247 spin_lock_bh(&conn->psq_lock);
1248 skb = skb_dequeue(&conn->apsdq);
1249 is_apsdq_empty = skb_queue_empty(&conn->apsdq);
1250 spin_unlock_bh(&conn->psq_lock);
1253 * Set the STA flag to Trigger delivery,
1254 * so that the frame will go out
1256 conn->sta_flags |= STA_PS_APSD_TRIGGER;
1257 num_frames_to_deliver--;
1259 /* Last frame in the service period, set EOSP or queue empty */
1260 if ((is_apsdq_empty) || (!num_frames_to_deliver))
1261 conn->sta_flags |= STA_PS_APSD_EOSP;
1263 ath6kl_data_tx(skb, vif->ndev);
1264 conn->sta_flags &= ~(STA_PS_APSD_TRIGGER);
1265 conn->sta_flags &= ~(STA_PS_APSD_EOSP);
1268 if (is_apsdq_empty) {
1269 if (is_apsdq_empty_at_start)
1270 flags = WMI_AP_APSD_NO_DELIVERY_FRAMES;
1274 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi,
1276 conn->aid, 0, flags);
1282 void ath6kl_rx(struct htc_target *target, struct htc_packet *packet)
1284 struct ath6kl *ar = target->dev->ar;
1285 struct sk_buff *skb = packet->pkt_cntxt;
1286 struct wmi_rx_meta_v2 *meta;
1287 struct wmi_data_hdr *dhdr;
1289 u8 meta_type, dot11_hdr = 0;
1290 u8 pad_before_data_start;
1291 int status = packet->status;
1292 enum htc_endpoint_id ept = packet->endpoint;
1293 bool is_amsdu, prev_ps, ps_state = false;
1294 bool trig_state = false;
1295 struct ath6kl_sta *conn = NULL;
1296 struct sk_buff *skb1 = NULL;
1297 struct ethhdr *datap = NULL;
1298 struct ath6kl_vif *vif;
1299 struct aggr_info_conn *aggr_conn;
1303 ath6kl_dbg(ATH6KL_DBG_WLAN_RX,
1304 "%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d",
1305 __func__, ar, ept, skb, packet->buf,
1306 packet->act_len, status);
1308 if (status || !(skb->data + HTC_HDR_LENGTH)) {
1313 skb_put(skb, packet->act_len + HTC_HDR_LENGTH);
1314 skb_pull(skb, HTC_HDR_LENGTH);
1316 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "rx ",
1317 skb->data, skb->len);
1319 if (ept == ar->ctrl_ep) {
1320 if (test_bit(WMI_ENABLED, &ar->flag)) {
1321 ath6kl_check_wow_status(ar);
1322 ath6kl_wmi_control_rx(ar->wmi, skb);
1326 wmi_cmd_hdr_get_if_idx((struct wmi_cmd_hdr *) skb->data);
1329 wmi_data_hdr_get_if_idx((struct wmi_data_hdr *) skb->data);
1332 vif = ath6kl_get_vif_by_index(ar, if_idx);
1339 * Take lock to protect buffer counts and adaptive power throughput
1342 spin_lock_bh(&vif->if_lock);
1344 vif->net_stats.rx_packets++;
1345 vif->net_stats.rx_bytes += packet->act_len;
1347 spin_unlock_bh(&vif->if_lock);
1349 skb->dev = vif->ndev;
1351 if (!test_bit(WMI_ENABLED, &ar->flag)) {
1352 if (EPPING_ALIGNMENT_PAD > 0)
1353 skb_pull(skb, EPPING_ALIGNMENT_PAD);
1354 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb);
1358 ath6kl_check_wow_status(ar);
1360 min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) +
1361 sizeof(struct ath6kl_llc_snap_hdr);
1363 dhdr = (struct wmi_data_hdr *) skb->data;
1366 * In the case of AP mode we may receive NULL data frames
1367 * that do not have LLC hdr. They are 16 bytes in size.
1368 * Allow these frames in the AP mode.
1370 if (vif->nw_type != AP_NETWORK &&
1371 ((packet->act_len < min_hdr_len) ||
1372 (packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) {
1373 ath6kl_info("frame len is too short or too long\n");
1374 vif->net_stats.rx_errors++;
1375 vif->net_stats.rx_length_errors++;
1380 /* Get the Power save state of the STA */
1381 if (vif->nw_type == AP_NETWORK) {
1382 meta_type = wmi_data_hdr_get_meta(dhdr);
1384 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) &
1385 WMI_DATA_HDR_PS_MASK);
1387 offset = sizeof(struct wmi_data_hdr);
1388 trig_state = !!(le16_to_cpu(dhdr->info3) & WMI_DATA_HDR_TRIG);
1390 switch (meta_type) {
1393 case WMI_META_VERSION_1:
1394 offset += sizeof(struct wmi_rx_meta_v1);
1396 case WMI_META_VERSION_2:
1397 offset += sizeof(struct wmi_rx_meta_v2);
1403 datap = (struct ethhdr *) (skb->data + offset);
1404 conn = ath6kl_find_sta(vif, datap->h_source);
1412 * If there is a change in PS state of the STA,
1413 * take appropriate steps:
1415 * 1. If Sleep-->Awake, flush the psq for the STA
1416 * Clear the PVB for the STA.
1417 * 2. If Awake-->Sleep, Starting queueing frames
1420 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP);
1423 conn->sta_flags |= STA_PS_SLEEP;
1425 conn->sta_flags &= ~STA_PS_SLEEP;
1427 /* Accept trigger only when the station is in sleep */
1428 if ((conn->sta_flags & STA_PS_SLEEP) && trig_state)
1429 ath6kl_uapsd_trigger_frame_rx(vif, conn);
1431 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) {
1432 if (!(conn->sta_flags & STA_PS_SLEEP)) {
1433 struct sk_buff *skbuff = NULL;
1434 bool is_apsdq_empty;
1435 struct ath6kl_mgmt_buff *mgmt;
1438 spin_lock_bh(&conn->psq_lock);
1439 while (conn->mgmt_psq_len > 0) {
1440 mgmt = list_first_entry(
1442 struct ath6kl_mgmt_buff,
1444 list_del(&mgmt->list);
1445 conn->mgmt_psq_len--;
1446 spin_unlock_bh(&conn->psq_lock);
1447 idx = vif->fw_vif_idx;
1449 ath6kl_wmi_send_mgmt_cmd(ar->wmi,
1459 spin_lock_bh(&conn->psq_lock);
1461 conn->mgmt_psq_len = 0;
1462 while ((skbuff = skb_dequeue(&conn->psq))) {
1463 spin_unlock_bh(&conn->psq_lock);
1464 ath6kl_data_tx(skbuff, vif->ndev);
1465 spin_lock_bh(&conn->psq_lock);
1468 is_apsdq_empty = skb_queue_empty(&conn->apsdq);
1469 while ((skbuff = skb_dequeue(&conn->apsdq))) {
1470 spin_unlock_bh(&conn->psq_lock);
1471 ath6kl_data_tx(skbuff, vif->ndev);
1472 spin_lock_bh(&conn->psq_lock);
1474 spin_unlock_bh(&conn->psq_lock);
1476 if (!is_apsdq_empty)
1477 ath6kl_wmi_set_apsd_bfrd_traf(
1482 /* Clear the PVB for this STA */
1483 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1488 /* drop NULL data frames here */
1489 if ((packet->act_len < min_hdr_len) ||
1491 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) {
1497 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false;
1498 tid = wmi_data_hdr_get_up(dhdr);
1499 seq_no = wmi_data_hdr_get_seqno(dhdr);
1500 meta_type = wmi_data_hdr_get_meta(dhdr);
1501 dot11_hdr = wmi_data_hdr_get_dot11(dhdr);
1502 pad_before_data_start =
1503 (le16_to_cpu(dhdr->info3) >> WMI_DATA_HDR_PAD_BEFORE_DATA_SHIFT)
1504 & WMI_DATA_HDR_PAD_BEFORE_DATA_MASK;
1506 skb_pull(skb, sizeof(struct wmi_data_hdr));
1508 switch (meta_type) {
1509 case WMI_META_VERSION_1:
1510 skb_pull(skb, sizeof(struct wmi_rx_meta_v1));
1512 case WMI_META_VERSION_2:
1513 meta = (struct wmi_rx_meta_v2 *) skb->data;
1514 if (meta->csum_flags & 0x1) {
1515 skb->ip_summed = CHECKSUM_COMPLETE;
1516 skb->csum = (__force __wsum) meta->csum;
1518 skb_pull(skb, sizeof(struct wmi_rx_meta_v2));
1524 skb_pull(skb, pad_before_data_start);
1527 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb);
1529 status = ath6kl_wmi_dot3_2_dix(skb);
1533 * Drop frames that could not be processed (lack of
1540 if (!(vif->ndev->flags & IFF_UP)) {
1545 if (vif->nw_type == AP_NETWORK) {
1546 datap = (struct ethhdr *) skb->data;
1547 if (is_multicast_ether_addr(datap->h_dest))
1549 * Bcast/Mcast frames should be sent to the
1550 * OS stack as well as on the air.
1552 skb1 = skb_copy(skb, GFP_ATOMIC);
1555 * Search for a connected STA with dstMac
1556 * as the Mac address. If found send the
1557 * frame to it on the air else send the
1558 * frame up the stack.
1560 conn = ath6kl_find_sta(vif, datap->h_dest);
1562 if (conn && ar->intra_bss) {
1565 } else if (conn && !ar->intra_bss) {
1571 ath6kl_data_tx(skb1, vif->ndev);
1574 /* nothing to deliver up the stack */
1579 datap = (struct ethhdr *) skb->data;
1581 if (is_unicast_ether_addr(datap->h_dest)) {
1582 if (vif->nw_type == AP_NETWORK) {
1583 conn = ath6kl_find_sta(vif, datap->h_source);
1586 aggr_conn = conn->aggr_conn;
1588 aggr_conn = vif->aggr_cntxt->aggr_conn;
1590 if (aggr_process_recv_frm(aggr_conn, tid, seq_no,
1592 /* aggregation code will handle the skb */
1597 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb);
1600 static void aggr_timeout(unsigned long arg)
1603 struct aggr_info_conn *aggr_conn = (struct aggr_info_conn *) arg;
1604 struct rxtid *rxtid;
1605 struct rxtid_stats *stats;
1607 for (i = 0; i < NUM_OF_TIDS; i++) {
1608 rxtid = &aggr_conn->rx_tid[i];
1609 stats = &aggr_conn->stat[i];
1611 if (!rxtid->aggr || !rxtid->timer_mon || rxtid->progress)
1614 stats->num_timeouts++;
1615 ath6kl_dbg(ATH6KL_DBG_AGGR,
1616 "aggr timeout (st %d end %d)\n",
1618 ((rxtid->seq_next + rxtid->hold_q_sz-1) &
1619 ATH6KL_MAX_SEQ_NO));
1620 aggr_deque_frms(aggr_conn, i, 0, 0);
1623 aggr_conn->timer_scheduled = false;
1625 for (i = 0; i < NUM_OF_TIDS; i++) {
1626 rxtid = &aggr_conn->rx_tid[i];
1628 if (rxtid->aggr && rxtid->hold_q) {
1629 for (j = 0; j < rxtid->hold_q_sz; j++) {
1630 if (rxtid->hold_q[j].skb) {
1631 aggr_conn->timer_scheduled = true;
1632 rxtid->timer_mon = true;
1633 rxtid->progress = false;
1638 if (j >= rxtid->hold_q_sz)
1639 rxtid->timer_mon = false;
1643 if (aggr_conn->timer_scheduled)
1644 mod_timer(&aggr_conn->timer,
1645 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT));
1648 static void aggr_delete_tid_state(struct aggr_info_conn *aggr_conn, u8 tid)
1650 struct rxtid *rxtid;
1651 struct rxtid_stats *stats;
1653 if (!aggr_conn || tid >= NUM_OF_TIDS)
1656 rxtid = &aggr_conn->rx_tid[tid];
1657 stats = &aggr_conn->stat[tid];
1660 aggr_deque_frms(aggr_conn, tid, 0, 0);
1662 rxtid->aggr = false;
1663 rxtid->progress = false;
1664 rxtid->timer_mon = false;
1666 rxtid->seq_next = 0;
1667 rxtid->hold_q_sz = 0;
1669 kfree(rxtid->hold_q);
1670 rxtid->hold_q = NULL;
1672 memset(stats, 0, sizeof(struct rxtid_stats));
1675 void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid_mux, u16 seq_no,
1678 struct ath6kl_sta *sta;
1679 struct aggr_info_conn *aggr_conn = NULL;
1680 struct rxtid *rxtid;
1681 struct rxtid_stats *stats;
1685 if (vif->nw_type == AP_NETWORK) {
1686 aid = ath6kl_get_aid(tid_mux);
1687 sta = ath6kl_find_sta_by_aid(vif->ar, aid);
1689 aggr_conn = sta->aggr_conn;
1691 aggr_conn = vif->aggr_cntxt->aggr_conn;
1696 tid = ath6kl_get_tid(tid_mux);
1697 if (tid >= NUM_OF_TIDS)
1700 rxtid = &aggr_conn->rx_tid[tid];
1701 stats = &aggr_conn->stat[tid];
1703 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX)
1704 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n",
1705 __func__, win_sz, tid);
1708 aggr_delete_tid_state(aggr_conn, tid);
1710 rxtid->seq_next = seq_no;
1711 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q);
1712 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL);
1716 rxtid->win_sz = win_sz;
1717 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz);
1718 if (!skb_queue_empty(&rxtid->q))
1724 void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info,
1725 struct aggr_info_conn *aggr_conn)
1727 struct rxtid *rxtid;
1730 aggr_conn->aggr_sz = AGGR_SZ_DEFAULT;
1731 aggr_conn->dev = vif->ndev;
1732 init_timer(&aggr_conn->timer);
1733 aggr_conn->timer.function = aggr_timeout;
1734 aggr_conn->timer.data = (unsigned long) aggr_conn;
1735 aggr_conn->aggr_info = aggr_info;
1737 aggr_conn->timer_scheduled = false;
1739 for (i = 0; i < NUM_OF_TIDS; i++) {
1740 rxtid = &aggr_conn->rx_tid[i];
1741 rxtid->aggr = false;
1742 rxtid->progress = false;
1743 rxtid->timer_mon = false;
1744 skb_queue_head_init(&rxtid->q);
1745 spin_lock_init(&rxtid->lock);
1750 struct aggr_info *aggr_init(struct ath6kl_vif *vif)
1752 struct aggr_info *p_aggr = NULL;
1754 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL);
1756 ath6kl_err("failed to alloc memory for aggr_node\n");
1760 p_aggr->aggr_conn = kzalloc(sizeof(struct aggr_info_conn), GFP_KERNEL);
1761 if (!p_aggr->aggr_conn) {
1762 ath6kl_err("failed to alloc memory for connection specific aggr info\n");
1767 aggr_conn_init(vif, p_aggr, p_aggr->aggr_conn);
1769 skb_queue_head_init(&p_aggr->rx_amsdu_freeq);
1770 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, AGGR_NUM_OF_FREE_NETBUFS);
1775 void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid_mux)
1777 struct ath6kl_sta *sta;
1778 struct rxtid *rxtid;
1779 struct aggr_info_conn *aggr_conn = NULL;
1782 if (vif->nw_type == AP_NETWORK) {
1783 aid = ath6kl_get_aid(tid_mux);
1784 sta = ath6kl_find_sta_by_aid(vif->ar, aid);
1786 aggr_conn = sta->aggr_conn;
1788 aggr_conn = vif->aggr_cntxt->aggr_conn;
1793 tid = ath6kl_get_tid(tid_mux);
1794 if (tid >= NUM_OF_TIDS)
1797 rxtid = &aggr_conn->rx_tid[tid];
1800 aggr_delete_tid_state(aggr_conn, tid);
1803 void aggr_reset_state(struct aggr_info_conn *aggr_conn)
1810 if (aggr_conn->timer_scheduled) {
1811 del_timer(&aggr_conn->timer);
1812 aggr_conn->timer_scheduled = false;
1815 for (tid = 0; tid < NUM_OF_TIDS; tid++)
1816 aggr_delete_tid_state(aggr_conn, tid);
1819 /* clean up our amsdu buffer list */
1820 void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar)
1822 struct htc_packet *packet, *tmp_pkt;
1824 spin_lock_bh(&ar->lock);
1825 if (list_empty(&ar->amsdu_rx_buffer_queue)) {
1826 spin_unlock_bh(&ar->lock);
1830 list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue,
1832 list_del(&packet->list);
1833 spin_unlock_bh(&ar->lock);
1834 dev_kfree_skb(packet->pkt_cntxt);
1835 spin_lock_bh(&ar->lock);
1838 spin_unlock_bh(&ar->lock);
1841 void aggr_module_destroy(struct aggr_info *aggr_info)
1846 aggr_reset_state(aggr_info->aggr_conn);
1847 skb_queue_purge(&aggr_info->rx_amsdu_freeq);
1848 kfree(aggr_info->aggr_conn);