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