drivers/net/wireless/ath/ath6kl/txrx.c

   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 }