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.
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 * tid - tid_mux0..tid_mux3
26 * aid - tid_mux4..tid_mux7
28 #define ATH6KL_TID_MASK 0xf
29 #define ATH6KL_AID_SHIFT 4
31 static inline u8 ath6kl_get_tid(u8 tid_mux)
33 return tid_mux & ATH6KL_TID_MASK;
36 static inline u8 ath6kl_get_aid(u8 tid_mux)
38 return tid_mux >> ATH6KL_AID_SHIFT;
41 static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev,
44 struct ath6kl *ar = ath6kl_priv(dev);
45 struct ethhdr *eth_hdr;
51 eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr));
53 if (is_multicast_ether_addr(eth_hdr->h_dest))
56 for (i = 0; i < ar->node_num; i++) {
57 if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr,
60 ar->node_map[i].tx_pend++;
61 return ar->node_map[i].ep_id;
64 if ((ep_map == -1) && !ar->node_map[i].tx_pend)
69 ep_map = ar->node_num;
71 if (ar->node_num > MAX_NODE_NUM)
72 return ENDPOINT_UNUSED;
75 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN);
77 for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) {
78 if (!ar->tx_pending[i]) {
79 ar->node_map[ep_map].ep_id = i;
84 * No free endpoint is available, start redistribution on
85 * the inuse endpoints.
87 if (i == ENDPOINT_5) {
88 ar->node_map[ep_map].ep_id = ar->next_ep_id;
90 if (ar->next_ep_id > ENDPOINT_5)
91 ar->next_ep_id = ENDPOINT_2;
96 ar->node_map[ep_map].tx_pend++;
98 return ar->node_map[ep_map].ep_id;
101 static bool ath6kl_process_uapsdq(struct ath6kl_sta *conn,
102 struct ath6kl_vif *vif,
106 struct ath6kl *ar = vif->ar;
107 bool is_apsdq_empty = false;
108 struct ethhdr *datap = (struct ethhdr *) skb->data;
109 u8 up = 0, traffic_class, *ip_hdr;
111 struct ath6kl_llc_snap_hdr *llc_hdr;
113 if (conn->sta_flags & STA_PS_APSD_TRIGGER) {
115 * This tx is because of a uAPSD trigger, determine
116 * more and EOSP bit. Set EOSP if queue is empty
117 * or sufficient frames are delivered for this trigger.
119 spin_lock_bh(&conn->psq_lock);
120 if (!skb_queue_empty(&conn->apsdq))
121 *flags |= WMI_DATA_HDR_FLAGS_MORE;
122 else if (conn->sta_flags & STA_PS_APSD_EOSP)
123 *flags |= WMI_DATA_HDR_FLAGS_EOSP;
124 *flags |= WMI_DATA_HDR_FLAGS_UAPSD;
125 spin_unlock_bh(&conn->psq_lock);
127 } else if (!conn->apsd_info)
130 if (test_bit(WMM_ENABLED, &vif->flags)) {
131 ether_type = be16_to_cpu(datap->h_proto);
132 if (is_ethertype(ether_type)) {
133 /* packet is in DIX format */
134 ip_hdr = (u8 *)(datap + 1);
136 /* packet is in 802.3 format */
137 llc_hdr = (struct ath6kl_llc_snap_hdr *)
139 ether_type = be16_to_cpu(llc_hdr->eth_type);
140 ip_hdr = (u8 *)(llc_hdr + 1);
143 if (ether_type == IP_ETHERTYPE)
144 up = ath6kl_wmi_determine_user_priority(
148 traffic_class = ath6kl_wmi_get_traffic_class(up);
150 if ((conn->apsd_info & (1 << traffic_class)) == 0)
153 /* Queue the frames if the STA is sleeping */
154 spin_lock_bh(&conn->psq_lock);
155 is_apsdq_empty = skb_queue_empty(&conn->apsdq);
156 skb_queue_tail(&conn->apsdq, skb);
157 spin_unlock_bh(&conn->psq_lock);
160 * If this is the first pkt getting queued
161 * for this STA, update the PVB for this STA
163 if (is_apsdq_empty) {
164 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi,
168 *flags |= WMI_DATA_HDR_FLAGS_UAPSD;
173 static bool ath6kl_process_psq(struct ath6kl_sta *conn,
174 struct ath6kl_vif *vif,
178 bool is_psq_empty = false;
179 struct ath6kl *ar = vif->ar;
181 if (conn->sta_flags & STA_PS_POLLED) {
182 spin_lock_bh(&conn->psq_lock);
183 if (!skb_queue_empty(&conn->psq))
184 *flags |= WMI_DATA_HDR_FLAGS_MORE;
185 spin_unlock_bh(&conn->psq_lock);
189 /* Queue the frames if the STA is sleeping */
190 spin_lock_bh(&conn->psq_lock);
191 is_psq_empty = skb_queue_empty(&conn->psq);
192 skb_queue_tail(&conn->psq, skb);
193 spin_unlock_bh(&conn->psq_lock);
196 * If this is the first pkt getting queued
197 * for this STA, update the PVB for this
201 ath6kl_wmi_set_pvb_cmd(ar->wmi,
207 static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb,
210 struct ethhdr *datap = (struct ethhdr *) skb->data;
211 struct ath6kl_sta *conn = NULL;
212 bool ps_queued = false;
213 struct ath6kl *ar = vif->ar;
215 if (is_multicast_ether_addr(datap->h_dest)) {
217 bool q_mcast = false;
219 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
220 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) {
228 * If this transmit is not because of a Dtim Expiry
231 if (!test_bit(DTIM_EXPIRED, &vif->flags)) {
232 bool is_mcastq_empty = false;
234 spin_lock_bh(&ar->mcastpsq_lock);
236 skb_queue_empty(&ar->mcastpsq);
237 skb_queue_tail(&ar->mcastpsq, skb);
238 spin_unlock_bh(&ar->mcastpsq_lock);
241 * If this is the first Mcast pkt getting
242 * queued indicate to the target to set the
243 * BitmapControl LSB of the TIM IE.
246 ath6kl_wmi_set_pvb_cmd(ar->wmi,
253 * This transmit is because of Dtim expiry.
254 * Determine if MoreData bit has to be set.
256 spin_lock_bh(&ar->mcastpsq_lock);
257 if (!skb_queue_empty(&ar->mcastpsq))
258 *flags |= WMI_DATA_HDR_FLAGS_MORE;
259 spin_unlock_bh(&ar->mcastpsq_lock);
263 conn = ath6kl_find_sta(vif, datap->h_dest);
267 /* Inform the caller that the skb is consumed */
271 if (conn->sta_flags & STA_PS_SLEEP) {
272 ps_queued = ath6kl_process_uapsdq(conn,
274 if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD))
275 ps_queued = ath6kl_process_psq(conn,
284 int ath6kl_control_tx(void *devt, struct sk_buff *skb,
285 enum htc_endpoint_id eid)
287 struct ath6kl *ar = devt;
289 struct ath6kl_cookie *cookie = NULL;
291 if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW))
294 spin_lock_bh(&ar->lock);
296 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
297 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__,
300 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) {
302 * Control endpoint is full, don't allocate resources, we
303 * are just going to drop this packet.
306 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n",
309 cookie = ath6kl_alloc_cookie(ar);
311 if (cookie == NULL) {
312 spin_unlock_bh(&ar->lock);
317 ar->tx_pending[eid]++;
319 if (eid != ar->ctrl_ep)
320 ar->total_tx_data_pend++;
322 spin_unlock_bh(&ar->lock);
326 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
327 eid, ATH6KL_CONTROL_PKT_TAG);
328 cookie->htc_pkt.skb = skb;
331 * This interface is asynchronous, if there is an error, cleanup
332 * will happen in the TX completion callback.
334 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
343 int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev)
345 struct ath6kl *ar = ath6kl_priv(dev);
346 struct ath6kl_cookie *cookie = NULL;
347 enum htc_endpoint_id eid = ENDPOINT_UNUSED;
348 struct ath6kl_vif *vif = netdev_priv(dev);
350 u16 htc_tag = ATH6KL_DATA_PKT_TAG;
351 u8 ac = 99 ; /* initialize to unmapped ac */
352 bool chk_adhoc_ps_mapping = false;
354 struct wmi_tx_meta_v2 meta_v2;
356 u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed;
360 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
361 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__,
362 skb, skb->data, skb->len);
364 /* If target is not associated */
365 if (!test_bit(CONNECTED, &vif->flags))
368 if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON))
371 if (!test_bit(WMI_READY, &ar->flag))
374 /* AP mode Power saving processing */
375 if (vif->nw_type == AP_NETWORK) {
376 if (ath6kl_powersave_ap(vif, skb, &flags))
380 if (test_bit(WMI_ENABLED, &ar->flag)) {
381 if ((dev->features & NETIF_F_IP_CSUM) &&
382 (csum == CHECKSUM_PARTIAL)) {
383 csum_start = skb->csum_start -
384 (skb_network_header(skb) - skb->head) +
385 sizeof(struct ath6kl_llc_snap_hdr);
386 csum_dest = skb->csum_offset + csum_start;
389 if (skb_headroom(skb) < dev->needed_headroom) {
390 struct sk_buff *tmp_skb = skb;
392 skb = skb_realloc_headroom(skb, dev->needed_headroom);
395 vif->net_stats.tx_dropped++;
400 if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) {
401 ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n");
405 if ((dev->features & NETIF_F_IP_CSUM) &&
406 (csum == CHECKSUM_PARTIAL)) {
407 meta_v2.csum_start = csum_start;
408 meta_v2.csum_dest = csum_dest;
410 /* instruct target to calculate checksum */
411 meta_v2.csum_flags = WMI_META_V2_FLAG_CSUM_OFFLOAD;
412 meta_ver = WMI_META_VERSION_2;
419 ret = ath6kl_wmi_data_hdr_add(ar->wmi, skb,
420 DATA_MSGTYPE, flags, 0,
422 meta, vif->fw_vif_idx);
425 ath6kl_warn("failed to add wmi data header:%d\n"
430 if ((vif->nw_type == ADHOC_NETWORK) &&
431 ar->ibss_ps_enable && test_bit(CONNECTED, &vif->flags))
432 chk_adhoc_ps_mapping = true;
434 /* get the stream mapping */
435 ret = ath6kl_wmi_implicit_create_pstream(ar->wmi,
436 vif->fw_vif_idx, skb,
437 0, test_bit(WMM_ENABLED, &vif->flags), &ac);
444 spin_lock_bh(&ar->lock);
446 if (chk_adhoc_ps_mapping)
447 eid = ath6kl_ibss_map_epid(skb, dev, &map_no);
449 eid = ar->ac2ep_map[ac];
451 if (eid == 0 || eid == ENDPOINT_UNUSED) {
452 ath6kl_err("eid %d is not mapped!\n", eid);
453 spin_unlock_bh(&ar->lock);
457 /* allocate resource for this packet */
458 cookie = ath6kl_alloc_cookie(ar);
461 spin_unlock_bh(&ar->lock);
465 /* update counts while the lock is held */
466 ar->tx_pending[eid]++;
467 ar->total_tx_data_pend++;
469 spin_unlock_bh(&ar->lock);
471 if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) &&
474 * We will touch (move the buffer data to align it. Since the
475 * skb buffer is cloned and not only the header is changed, we
476 * have to copy it to allow the changes. Since we are copying
477 * the data here, we may as well align it by reserving suitable
478 * headroom to avoid the memmove in ath6kl_htc_tx_buf_align().
480 struct sk_buff *nskb;
482 nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC);
490 cookie->map_no = map_no;
491 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
493 cookie->htc_pkt.skb = skb;
495 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ",
496 skb->data, skb->len);
499 * HTC interface is asynchronous, if this fails, cleanup will
500 * happen in the ath6kl_tx_complete callback.
502 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
509 vif->net_stats.tx_dropped++;
510 vif->net_stats.tx_aborted_errors++;
515 /* indicate tx activity or inactivity on a WMI stream */
516 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active)
518 struct ath6kl *ar = devt;
519 enum htc_endpoint_id eid;
522 eid = ar->ac2ep_map[traffic_class];
524 if (!test_bit(WMI_ENABLED, &ar->flag))
527 spin_lock_bh(&ar->lock);
529 ar->ac_stream_active[traffic_class] = active;
533 * Keep track of the active stream with the highest
536 if (ar->ac_stream_pri_map[traffic_class] >
537 ar->hiac_stream_active_pri)
538 /* set the new highest active priority */
539 ar->hiac_stream_active_pri =
540 ar->ac_stream_pri_map[traffic_class];
544 * We may have to search for the next active stream
545 * that is the highest priority.
547 if (ar->hiac_stream_active_pri ==
548 ar->ac_stream_pri_map[traffic_class]) {
550 * The highest priority stream just went inactive
551 * reset and search for the "next" highest "active"
554 ar->hiac_stream_active_pri = 0;
556 for (i = 0; i < WMM_NUM_AC; i++) {
557 if (ar->ac_stream_active[i] &&
558 (ar->ac_stream_pri_map[i] >
559 ar->hiac_stream_active_pri))
561 * Set the new highest active
564 ar->hiac_stream_active_pri =
565 ar->ac_stream_pri_map[i];
570 spin_unlock_bh(&ar->lock);
573 /* notify HTC, this may cause credit distribution changes */
574 ath6kl_htc_activity_changed(ar->htc_target, eid, active);
577 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target,
578 struct htc_packet *packet)
580 struct ath6kl *ar = target->dev->ar;
581 struct ath6kl_vif *vif;
582 enum htc_endpoint_id endpoint = packet->endpoint;
583 enum htc_send_full_action action = HTC_SEND_FULL_KEEP;
585 if (endpoint == ar->ctrl_ep) {
587 * Under normal WMI if this is getting full, then something
588 * is running rampant the host should not be exhausting the
589 * WMI queue with too many commands the only exception to
590 * this is during testing using endpointping.
592 set_bit(WMI_CTRL_EP_FULL, &ar->flag);
593 ath6kl_err("wmi ctrl ep is full\n");
597 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG)
601 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for
602 * the highest active stream.
604 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] <
605 ar->hiac_stream_active_pri &&
607 target->endpoint[endpoint].tx_drop_packet_threshold)
609 * Give preference to the highest priority stream by
610 * dropping the packets which overflowed.
612 action = HTC_SEND_FULL_DROP;
615 spin_lock_bh(&ar->list_lock);
616 list_for_each_entry(vif, &ar->vif_list, list) {
617 if (vif->nw_type == ADHOC_NETWORK ||
618 action != HTC_SEND_FULL_DROP) {
619 spin_unlock_bh(&ar->list_lock);
621 set_bit(NETQ_STOPPED, &vif->flags);
622 netif_stop_queue(vif->ndev);
627 spin_unlock_bh(&ar->list_lock);
632 /* TODO this needs to be looked at */
633 static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif,
634 enum htc_endpoint_id eid, u32 map_no)
636 struct ath6kl *ar = vif->ar;
639 if (vif->nw_type != ADHOC_NETWORK)
642 if (!ar->ibss_ps_enable)
645 if (eid == ar->ctrl_ep)
652 ar->node_map[map_no].tx_pend--;
654 if (ar->node_map[map_no].tx_pend)
657 if (map_no != (ar->node_num - 1))
660 for (i = ar->node_num; i > 0; i--) {
661 if (ar->node_map[i - 1].tx_pend)
664 memset(&ar->node_map[i - 1], 0,
665 sizeof(struct ath6kl_node_mapping));
670 void ath6kl_tx_complete(struct htc_target *target,
671 struct list_head *packet_queue)
673 struct ath6kl *ar = target->dev->ar;
674 struct sk_buff_head skb_queue;
675 struct htc_packet *packet;
677 struct ath6kl_cookie *ath6kl_cookie;
680 enum htc_endpoint_id eid;
681 bool wake_event = false;
682 bool flushing[ATH6KL_VIF_MAX] = {false};
684 struct ath6kl_vif *vif;
686 skb_queue_head_init(&skb_queue);
688 /* lock the driver as we update internal state */
689 spin_lock_bh(&ar->lock);
691 /* reap completed packets */
692 while (!list_empty(packet_queue)) {
694 packet = list_first_entry(packet_queue, struct htc_packet,
696 list_del(&packet->list);
698 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt;
702 status = packet->status;
703 skb = ath6kl_cookie->skb;
704 eid = packet->endpoint;
705 map_no = ath6kl_cookie->map_no;
707 if (!skb || !skb->data)
710 __skb_queue_tail(&skb_queue, skb);
712 if (!status && (packet->act_len != skb->len))
715 ar->tx_pending[eid]--;
717 if (eid != ar->ctrl_ep)
718 ar->total_tx_data_pend--;
720 if (eid == ar->ctrl_ep) {
721 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag))
722 clear_bit(WMI_CTRL_EP_FULL, &ar->flag);
724 if (ar->tx_pending[eid] == 0)
728 if (eid == ar->ctrl_ep) {
729 if_idx = wmi_cmd_hdr_get_if_idx(
730 (struct wmi_cmd_hdr *) packet->buf);
732 if_idx = wmi_data_hdr_get_if_idx(
733 (struct wmi_data_hdr *) packet->buf);
736 vif = ath6kl_get_vif_by_index(ar, if_idx);
738 ath6kl_free_cookie(ar, ath6kl_cookie);
743 if (status == -ECANCELED)
744 /* a packet was flushed */
745 flushing[if_idx] = true;
747 vif->net_stats.tx_errors++;
749 if (status != -ENOSPC && status != -ECANCELED)
750 ath6kl_warn("tx complete error: %d\n", status);
752 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
753 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
754 __func__, skb, packet->buf, packet->act_len,
757 ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
758 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
759 __func__, skb, packet->buf, packet->act_len,
762 flushing[if_idx] = false;
763 vif->net_stats.tx_packets++;
764 vif->net_stats.tx_bytes += skb->len;
767 ath6kl_tx_clear_node_map(vif, eid, map_no);
769 ath6kl_free_cookie(ar, ath6kl_cookie);
771 if (test_bit(NETQ_STOPPED, &vif->flags))
772 clear_bit(NETQ_STOPPED, &vif->flags);
775 spin_unlock_bh(&ar->lock);
777 __skb_queue_purge(&skb_queue);
780 spin_lock_bh(&ar->list_lock);
781 list_for_each_entry(vif, &ar->vif_list, list) {
782 if (test_bit(CONNECTED, &vif->flags) &&
783 !flushing[vif->fw_vif_idx]) {
784 spin_unlock_bh(&ar->list_lock);
785 netif_wake_queue(vif->ndev);
786 spin_lock_bh(&ar->list_lock);
789 spin_unlock_bh(&ar->list_lock);
792 wake_up(&ar->event_wq);
798 spin_unlock_bh(&ar->lock);
802 void ath6kl_tx_data_cleanup(struct ath6kl *ar)
806 /* flush all the data (non-control) streams */
807 for (i = 0; i < WMM_NUM_AC; i++)
808 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i],
809 ATH6KL_DATA_PKT_TAG);
814 static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev,
822 if (!(skb->dev->flags & IFF_UP)) {
827 skb->protocol = eth_type_trans(skb, skb->dev);
832 static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num)
837 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
839 ath6kl_err("netbuf allocation failed\n");
842 skb_queue_tail(q, skb);
847 static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr)
849 struct sk_buff *skb = NULL;
851 if (skb_queue_len(&p_aggr->rx_amsdu_freeq) <
852 (AGGR_NUM_OF_FREE_NETBUFS >> 2))
853 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq,
854 AGGR_NUM_OF_FREE_NETBUFS);
856 skb = skb_dequeue(&p_aggr->rx_amsdu_freeq);
861 void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint)
863 struct ath6kl *ar = target->dev->ar;
867 struct htc_packet *packet;
868 struct list_head queue;
870 n_buf_refill = ATH6KL_MAX_RX_BUFFERS -
871 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint);
873 if (n_buf_refill <= 0)
876 INIT_LIST_HEAD(&queue);
878 ath6kl_dbg(ATH6KL_DBG_WLAN_RX,
879 "%s: providing htc with %d buffers at eid=%d\n",
880 __func__, n_buf_refill, endpoint);
882 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) {
883 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
887 packet = (struct htc_packet *) skb->head;
888 if (!IS_ALIGNED((unsigned long) skb->data, 4))
889 skb->data = PTR_ALIGN(skb->data - 4, 4);
890 set_htc_rxpkt_info(packet, skb, skb->data,
891 ATH6KL_BUFFER_SIZE, endpoint);
893 list_add_tail(&packet->list, &queue);
896 if (!list_empty(&queue))
897 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue);
900 void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count)
902 struct htc_packet *packet;
906 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE);
910 packet = (struct htc_packet *) skb->head;
911 if (!IS_ALIGNED((unsigned long) skb->data, 4))
912 skb->data = PTR_ALIGN(skb->data - 4, 4);
913 set_htc_rxpkt_info(packet, skb, skb->data,
914 ATH6KL_AMSDU_BUFFER_SIZE, 0);
917 spin_lock_bh(&ar->lock);
918 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue);
919 spin_unlock_bh(&ar->lock);
925 * Callback to allocate a receive buffer for a pending packet. We use a
926 * pre-allocated list of buffers of maximum AMSDU size (4K).
928 struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target,
929 enum htc_endpoint_id endpoint,
932 struct ath6kl *ar = target->dev->ar;
933 struct htc_packet *packet = NULL;
934 struct list_head *pkt_pos;
935 int refill_cnt = 0, depth = 0;
937 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n",
938 __func__, endpoint, len);
940 if ((len <= ATH6KL_BUFFER_SIZE) ||
941 (len > ATH6KL_AMSDU_BUFFER_SIZE))
944 spin_lock_bh(&ar->lock);
946 if (list_empty(&ar->amsdu_rx_buffer_queue)) {
947 spin_unlock_bh(&ar->lock);
948 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS;
952 packet = list_first_entry(&ar->amsdu_rx_buffer_queue,
953 struct htc_packet, list);
954 list_del(&packet->list);
955 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue)
958 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth;
959 spin_unlock_bh(&ar->lock);
961 /* set actual endpoint ID */
962 packet->endpoint = endpoint;
965 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD)
966 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt);
971 static void aggr_slice_amsdu(struct aggr_info *p_aggr,
972 struct rxtid *rxtid, struct sk_buff *skb)
974 struct sk_buff *new_skb;
976 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len;
979 mac_hdr_len = sizeof(struct ethhdr);
980 framep = skb->data + mac_hdr_len;
981 amsdu_len = skb->len - mac_hdr_len;
983 while (amsdu_len > mac_hdr_len) {
984 hdr = (struct ethhdr *) framep;
985 payload_8023_len = ntohs(hdr->h_proto);
987 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN ||
988 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) {
989 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n",
994 frame_8023_len = payload_8023_len + mac_hdr_len;
995 new_skb = aggr_get_free_skb(p_aggr);
997 ath6kl_err("no buffer available\n");
1001 memcpy(new_skb->data, framep, frame_8023_len);
1002 skb_put(new_skb, frame_8023_len);
1003 if (ath6kl_wmi_dot3_2_dix(new_skb)) {
1004 ath6kl_err("dot3_2_dix error\n");
1005 dev_kfree_skb(new_skb);
1009 skb_queue_tail(&rxtid->q, new_skb);
1011 /* Is this the last subframe within this aggregate ? */
1012 if ((amsdu_len - frame_8023_len) == 0)
1015 /* Add the length of A-MSDU subframe padding bytes -
1016 * Round to nearest word.
1018 frame_8023_len = ALIGN(frame_8023_len, 4);
1020 framep += frame_8023_len;
1021 amsdu_len -= frame_8023_len;
1027 static void aggr_deque_frms(struct aggr_info_conn *agg_conn, u8 tid,
1028 u16 seq_no, u8 order)
1030 struct sk_buff *skb;
1031 struct rxtid *rxtid;
1032 struct skb_hold_q *node;
1033 u16 idx, idx_end, seq_end;
1034 struct rxtid_stats *stats;
1036 rxtid = &agg_conn->rx_tid[tid];
1037 stats = &agg_conn->stat[tid];
1039 spin_lock_bh(&rxtid->lock);
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);
1059 node = &rxtid->hold_q[idx];
1060 if ((order == 1) && (!node->skb))
1065 aggr_slice_amsdu(agg_conn->aggr_info, rxtid,
1068 skb_queue_tail(&rxtid->q, node->skb);
1073 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next);
1074 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
1075 } while (idx != idx_end);
1077 spin_unlock_bh(&rxtid->lock);
1079 stats->num_delivered += skb_queue_len(&rxtid->q);
1081 while ((skb = skb_dequeue(&rxtid->q)))
1082 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, skb);
1085 static bool aggr_process_recv_frm(struct aggr_info_conn *agg_conn, u8 tid,
1087 bool is_amsdu, struct sk_buff *frame)
1089 struct rxtid *rxtid;
1090 struct rxtid_stats *stats;
1091 struct sk_buff *skb;
1092 struct skb_hold_q *node;
1093 u16 idx, st, cur, end;
1094 bool is_queued = false;
1097 rxtid = &agg_conn->rx_tid[tid];
1098 stats = &agg_conn->stat[tid];
1100 stats->num_into_aggr++;
1104 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, frame);
1107 while ((skb = skb_dequeue(&rxtid->q)))
1108 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev,
1114 /* Check the incoming sequence no, if it's in the window */
1115 st = rxtid->seq_next;
1117 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO;
1119 if (((st < end) && (cur < st || cur > end)) ||
1120 ((st > end) && (cur > end) && (cur < st))) {
1121 extended_end = (end + rxtid->hold_q_sz - 1) &
1124 if (((end < extended_end) &&
1125 (cur < end || cur > extended_end)) ||
1126 ((end > extended_end) && (cur > extended_end) &&
1128 aggr_deque_frms(agg_conn, tid, 0, 0);
1129 spin_lock_bh(&rxtid->lock);
1130 if (cur >= rxtid->hold_q_sz - 1)
1131 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1);
1133 rxtid->seq_next = ATH6KL_MAX_SEQ_NO -
1134 (rxtid->hold_q_sz - 2 - cur);
1135 spin_unlock_bh(&rxtid->lock);
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)
1191 spin_lock_bh(&rxtid->lock);
1192 for (idx = 0 ; idx < rxtid->hold_q_sz; idx++) {
1193 if (rxtid->hold_q[idx].skb) {
1195 * There is a frame in the queue and no
1196 * timer so start a timer to ensure that
1197 * the frame doesn't remain stuck
1200 agg_conn->timer_scheduled = true;
1201 mod_timer(&agg_conn->timer,
1202 (jiffies + (HZ * AGGR_RX_TIMEOUT) / 1000));
1203 rxtid->timer_mon = true;
1207 spin_unlock_bh(&rxtid->lock);
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 */
1595 } else if (!is_broadcast_ether_addr(datap->h_dest))
1596 vif->net_stats.multicast++;
1598 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb);
1601 static void aggr_timeout(unsigned long arg)
1604 struct aggr_info_conn *aggr_conn = (struct aggr_info_conn *) arg;
1605 struct rxtid *rxtid;
1606 struct rxtid_stats *stats;
1608 for (i = 0; i < NUM_OF_TIDS; i++) {
1609 rxtid = &aggr_conn->rx_tid[i];
1610 stats = &aggr_conn->stat[i];
1612 if (!rxtid->aggr || !rxtid->timer_mon)
1615 stats->num_timeouts++;
1616 ath6kl_dbg(ATH6KL_DBG_AGGR,
1617 "aggr timeout (st %d end %d)\n",
1619 ((rxtid->seq_next + rxtid->hold_q_sz-1) &
1620 ATH6KL_MAX_SEQ_NO));
1621 aggr_deque_frms(aggr_conn, i, 0, 0);
1624 aggr_conn->timer_scheduled = false;
1626 for (i = 0; i < NUM_OF_TIDS; i++) {
1627 rxtid = &aggr_conn->rx_tid[i];
1629 if (rxtid->aggr && rxtid->hold_q) {
1630 spin_lock_bh(&rxtid->lock);
1631 for (j = 0; j < rxtid->hold_q_sz; j++) {
1632 if (rxtid->hold_q[j].skb) {
1633 aggr_conn->timer_scheduled = true;
1634 rxtid->timer_mon = true;
1638 spin_unlock_bh(&rxtid->lock);
1640 if (j >= rxtid->hold_q_sz)
1641 rxtid->timer_mon = false;
1645 if (aggr_conn->timer_scheduled)
1646 mod_timer(&aggr_conn->timer,
1647 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT));
1650 static void aggr_delete_tid_state(struct aggr_info_conn *aggr_conn, u8 tid)
1652 struct rxtid *rxtid;
1653 struct rxtid_stats *stats;
1655 if (!aggr_conn || tid >= NUM_OF_TIDS)
1658 rxtid = &aggr_conn->rx_tid[tid];
1659 stats = &aggr_conn->stat[tid];
1662 aggr_deque_frms(aggr_conn, tid, 0, 0);
1664 rxtid->aggr = false;
1665 rxtid->timer_mon = false;
1667 rxtid->seq_next = 0;
1668 rxtid->hold_q_sz = 0;
1670 kfree(rxtid->hold_q);
1671 rxtid->hold_q = NULL;
1673 memset(stats, 0, sizeof(struct rxtid_stats));
1676 void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid_mux, u16 seq_no,
1679 struct ath6kl_sta *sta;
1680 struct aggr_info_conn *aggr_conn = NULL;
1681 struct rxtid *rxtid;
1682 struct rxtid_stats *stats;
1686 if (vif->nw_type == AP_NETWORK) {
1687 aid = ath6kl_get_aid(tid_mux);
1688 sta = ath6kl_find_sta_by_aid(vif->ar, aid);
1690 aggr_conn = sta->aggr_conn;
1692 aggr_conn = vif->aggr_cntxt->aggr_conn;
1697 tid = ath6kl_get_tid(tid_mux);
1698 if (tid >= NUM_OF_TIDS)
1701 rxtid = &aggr_conn->rx_tid[tid];
1702 stats = &aggr_conn->stat[tid];
1704 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX)
1705 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n",
1706 __func__, win_sz, tid);
1709 aggr_delete_tid_state(aggr_conn, tid);
1711 rxtid->seq_next = seq_no;
1712 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q);
1713 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL);
1717 rxtid->win_sz = win_sz;
1718 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz);
1719 if (!skb_queue_empty(&rxtid->q))
1725 void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info,
1726 struct aggr_info_conn *aggr_conn)
1728 struct rxtid *rxtid;
1731 aggr_conn->aggr_sz = AGGR_SZ_DEFAULT;
1732 aggr_conn->dev = vif->ndev;
1733 init_timer(&aggr_conn->timer);
1734 aggr_conn->timer.function = aggr_timeout;
1735 aggr_conn->timer.data = (unsigned long) aggr_conn;
1736 aggr_conn->aggr_info = aggr_info;
1738 aggr_conn->timer_scheduled = false;
1740 for (i = 0; i < NUM_OF_TIDS; i++) {
1741 rxtid = &aggr_conn->rx_tid[i];
1742 rxtid->aggr = 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);