1 /* 2 * Copyright (c) 2004-2011 Atheros Communications Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "core.h" 18 #include "debug.h" 19 20 static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev, 21 u32 *map_no) 22 { 23 struct ath6kl *ar = ath6kl_priv(dev); 24 struct ethhdr *eth_hdr; 25 u32 i, ep_map = -1; 26 u8 *datap; 27 28 *map_no = 0; 29 datap = skb->data; 30 eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr)); 31 32 if (is_multicast_ether_addr(eth_hdr->h_dest)) 33 return ENDPOINT_2; 34 35 for (i = 0; i < ar->node_num; i++) { 36 if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr, 37 ETH_ALEN) == 0) { 38 *map_no = i + 1; 39 ar->node_map[i].tx_pend++; 40 return ar->node_map[i].ep_id; 41 } 42 43 if ((ep_map == -1) && !ar->node_map[i].tx_pend) 44 ep_map = i; 45 } 46 47 if (ep_map == -1) { 48 ep_map = ar->node_num; 49 ar->node_num++; 50 if (ar->node_num > MAX_NODE_NUM) 51 return ENDPOINT_UNUSED; 52 } 53 54 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN); 55 56 for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) { 57 if (!ar->tx_pending[i]) { 58 ar->node_map[ep_map].ep_id = i; 59 break; 60 } 61 62 /* 63 * No free endpoint is available, start redistribution on 64 * the inuse endpoints. 65 */ 66 if (i == ENDPOINT_5) { 67 ar->node_map[ep_map].ep_id = ar->next_ep_id; 68 ar->next_ep_id++; 69 if (ar->next_ep_id > ENDPOINT_5) 70 ar->next_ep_id = ENDPOINT_2; 71 } 72 } 73 74 *map_no = ep_map + 1; 75 ar->node_map[ep_map].tx_pend++; 76 77 return ar->node_map[ep_map].ep_id; 78 } 79 80 static bool ath6kl_powersave_ap(struct ath6kl *ar, struct sk_buff *skb, 81 bool *more_data) 82 { 83 struct ethhdr *datap = (struct ethhdr *) skb->data; 84 struct ath6kl_sta *conn = NULL; 85 bool ps_queued = false, is_psq_empty = false; 86 87 if (is_multicast_ether_addr(datap->h_dest)) { 88 u8 ctr = 0; 89 bool q_mcast = false; 90 91 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) { 92 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) { 93 q_mcast = true; 94 break; 95 } 96 } 97 98 if (q_mcast) { 99 /* 100 * If this transmit is not because of a Dtim Expiry 101 * q it. 102 */ 103 if (!test_bit(DTIM_EXPIRED, &ar->flag)) { 104 bool is_mcastq_empty = false; 105 106 spin_lock_bh(&ar->mcastpsq_lock); 107 is_mcastq_empty = 108 skb_queue_empty(&ar->mcastpsq); 109 skb_queue_tail(&ar->mcastpsq, skb); 110 spin_unlock_bh(&ar->mcastpsq_lock); 111 112 /* 113 * If this is the first Mcast pkt getting 114 * queued indicate to the target to set the 115 * BitmapControl LSB of the TIM IE. 116 */ 117 if (is_mcastq_empty) 118 ath6kl_wmi_set_pvb_cmd(ar->wmi, 119 MCAST_AID, 1); 120 121 ps_queued = true; 122 } else { 123 /* 124 * This transmit is because of Dtim expiry. 125 * Determine if MoreData bit has to be set. 126 */ 127 spin_lock_bh(&ar->mcastpsq_lock); 128 if (!skb_queue_empty(&ar->mcastpsq)) 129 *more_data = true; 130 spin_unlock_bh(&ar->mcastpsq_lock); 131 } 132 } 133 } else { 134 conn = ath6kl_find_sta(ar, datap->h_dest); 135 if (!conn) { 136 dev_kfree_skb(skb); 137 138 /* Inform the caller that the skb is consumed */ 139 return true; 140 } 141 142 if (conn->sta_flags & STA_PS_SLEEP) { 143 if (!(conn->sta_flags & STA_PS_POLLED)) { 144 /* Queue the frames if the STA is sleeping */ 145 spin_lock_bh(&conn->psq_lock); 146 is_psq_empty = skb_queue_empty(&conn->psq); 147 skb_queue_tail(&conn->psq, skb); 148 spin_unlock_bh(&conn->psq_lock); 149 150 /* 151 * If this is the first pkt getting queued 152 * for this STA, update the PVB for this 153 * STA. 154 */ 155 if (is_psq_empty) 156 ath6kl_wmi_set_pvb_cmd(ar->wmi, 157 conn->aid, 1); 158 159 ps_queued = true; 160 } else { 161 /* 162 * This tx is because of a PsPoll. 163 * Determine if MoreData bit has to be set. 164 */ 165 spin_lock_bh(&conn->psq_lock); 166 if (!skb_queue_empty(&conn->psq)) 167 *more_data = true; 168 spin_unlock_bh(&conn->psq_lock); 169 } 170 } 171 } 172 173 return ps_queued; 174 } 175 176 /* Tx functions */ 177 178 int ath6kl_control_tx(void *devt, struct sk_buff *skb, 179 enum htc_endpoint_id eid) 180 { 181 struct ath6kl *ar = devt; 182 int status = 0; 183 struct ath6kl_cookie *cookie = NULL; 184 185 spin_lock_bh(&ar->lock); 186 187 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 188 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__, 189 skb, skb->len, eid); 190 191 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) { 192 /* 193 * Control endpoint is full, don't allocate resources, we 194 * are just going to drop this packet. 195 */ 196 cookie = NULL; 197 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n", 198 skb, skb->len); 199 } else 200 cookie = ath6kl_alloc_cookie(ar); 201 202 if (cookie == NULL) { 203 spin_unlock_bh(&ar->lock); 204 status = -ENOMEM; 205 goto fail_ctrl_tx; 206 } 207 208 ar->tx_pending[eid]++; 209 210 if (eid != ar->ctrl_ep) 211 ar->total_tx_data_pend++; 212 213 spin_unlock_bh(&ar->lock); 214 215 cookie->skb = skb; 216 cookie->map_no = 0; 217 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 218 eid, ATH6KL_CONTROL_PKT_TAG); 219 220 /* 221 * This interface is asynchronous, if there is an error, cleanup 222 * will happen in the TX completion callback. 223 */ 224 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 225 226 return 0; 227 228 fail_ctrl_tx: 229 dev_kfree_skb(skb); 230 return status; 231 } 232 233 int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev) 234 { 235 struct ath6kl *ar = ath6kl_priv(dev); 236 struct ath6kl_cookie *cookie = NULL; 237 enum htc_endpoint_id eid = ENDPOINT_UNUSED; 238 u32 map_no = 0; 239 u16 htc_tag = ATH6KL_DATA_PKT_TAG; 240 u8 ac = 99 ; /* initialize to unmapped ac */ 241 bool chk_adhoc_ps_mapping = false, more_data = false; 242 struct wmi_tx_meta_v2 meta_v2; 243 int ret; 244 245 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 246 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__, 247 skb, skb->data, skb->len); 248 249 /* If target is not associated */ 250 if (!test_bit(CONNECTED, &ar->flag)) { 251 dev_kfree_skb(skb); 252 return 0; 253 } 254 255 if (!test_bit(WMI_READY, &ar->flag)) 256 goto fail_tx; 257 258 /* AP mode Power saving processing */ 259 if (ar->nw_type == AP_NETWORK) { 260 if (ath6kl_powersave_ap(ar, skb, &more_data)) 261 return 0; 262 } 263 264 if (test_bit(WMI_ENABLED, &ar->flag)) { 265 memset(&meta_v2, 0, sizeof(meta_v2)); 266 267 if (skb_headroom(skb) < dev->needed_headroom) { 268 WARN_ON(1); 269 goto fail_tx; 270 } 271 272 if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) { 273 ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n"); 274 goto fail_tx; 275 } 276 277 if (ath6kl_wmi_data_hdr_add(ar->wmi, skb, DATA_MSGTYPE, 278 more_data, 0, 0, NULL)) { 279 ath6kl_err("wmi_data_hdr_add failed\n"); 280 goto fail_tx; 281 } 282 283 if ((ar->nw_type == ADHOC_NETWORK) && 284 ar->ibss_ps_enable && test_bit(CONNECTED, &ar->flag)) 285 chk_adhoc_ps_mapping = true; 286 else { 287 /* get the stream mapping */ 288 ret = ath6kl_wmi_implicit_create_pstream(ar->wmi, skb, 289 0, test_bit(WMM_ENABLED, &ar->flag), &ac); 290 if (ret) 291 goto fail_tx; 292 } 293 } else 294 goto fail_tx; 295 296 spin_lock_bh(&ar->lock); 297 298 if (chk_adhoc_ps_mapping) 299 eid = ath6kl_ibss_map_epid(skb, dev, &map_no); 300 else 301 eid = ar->ac2ep_map[ac]; 302 303 if (eid == 0 || eid == ENDPOINT_UNUSED) { 304 ath6kl_err("eid %d is not mapped!\n", eid); 305 spin_unlock_bh(&ar->lock); 306 goto fail_tx; 307 } 308 309 /* allocate resource for this packet */ 310 cookie = ath6kl_alloc_cookie(ar); 311 312 if (!cookie) { 313 spin_unlock_bh(&ar->lock); 314 goto fail_tx; 315 } 316 317 /* update counts while the lock is held */ 318 ar->tx_pending[eid]++; 319 ar->total_tx_data_pend++; 320 321 spin_unlock_bh(&ar->lock); 322 323 cookie->skb = skb; 324 cookie->map_no = map_no; 325 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 326 eid, htc_tag); 327 328 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, skb->data, skb->len); 329 330 /* 331 * HTC interface is asynchronous, if this fails, cleanup will 332 * happen in the ath6kl_tx_complete callback. 333 */ 334 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 335 336 return 0; 337 338 fail_tx: 339 dev_kfree_skb(skb); 340 341 ar->net_stats.tx_dropped++; 342 ar->net_stats.tx_aborted_errors++; 343 344 return 0; 345 } 346 347 /* indicate tx activity or inactivity on a WMI stream */ 348 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active) 349 { 350 struct ath6kl *ar = devt; 351 enum htc_endpoint_id eid; 352 int i; 353 354 eid = ar->ac2ep_map[traffic_class]; 355 356 if (!test_bit(WMI_ENABLED, &ar->flag)) 357 goto notify_htc; 358 359 spin_lock_bh(&ar->lock); 360 361 ar->ac_stream_active[traffic_class] = active; 362 363 if (active) { 364 /* 365 * Keep track of the active stream with the highest 366 * priority. 367 */ 368 if (ar->ac_stream_pri_map[traffic_class] > 369 ar->hiac_stream_active_pri) 370 /* set the new highest active priority */ 371 ar->hiac_stream_active_pri = 372 ar->ac_stream_pri_map[traffic_class]; 373 374 } else { 375 /* 376 * We may have to search for the next active stream 377 * that is the highest priority. 378 */ 379 if (ar->hiac_stream_active_pri == 380 ar->ac_stream_pri_map[traffic_class]) { 381 /* 382 * The highest priority stream just went inactive 383 * reset and search for the "next" highest "active" 384 * priority stream. 385 */ 386 ar->hiac_stream_active_pri = 0; 387 388 for (i = 0; i < WMM_NUM_AC; i++) { 389 if (ar->ac_stream_active[i] && 390 (ar->ac_stream_pri_map[i] > 391 ar->hiac_stream_active_pri)) 392 /* 393 * Set the new highest active 394 * priority. 395 */ 396 ar->hiac_stream_active_pri = 397 ar->ac_stream_pri_map[i]; 398 } 399 } 400 } 401 402 spin_unlock_bh(&ar->lock); 403 404 notify_htc: 405 /* notify HTC, this may cause credit distribution changes */ 406 ath6kl_htc_indicate_activity_change(ar->htc_target, eid, active); 407 } 408 409 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target, 410 struct htc_packet *packet) 411 { 412 struct ath6kl *ar = target->dev->ar; 413 enum htc_endpoint_id endpoint = packet->endpoint; 414 415 if (endpoint == ar->ctrl_ep) { 416 /* 417 * Under normal WMI if this is getting full, then something 418 * is running rampant the host should not be exhausting the 419 * WMI queue with too many commands the only exception to 420 * this is during testing using endpointping. 421 */ 422 spin_lock_bh(&ar->lock); 423 set_bit(WMI_CTRL_EP_FULL, &ar->flag); 424 spin_unlock_bh(&ar->lock); 425 ath6kl_err("wmi ctrl ep is full\n"); 426 return HTC_SEND_FULL_KEEP; 427 } 428 429 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG) 430 return HTC_SEND_FULL_KEEP; 431 432 if (ar->nw_type == ADHOC_NETWORK) 433 /* 434 * In adhoc mode, we cannot differentiate traffic 435 * priorities so there is no need to continue, however we 436 * should stop the network. 437 */ 438 goto stop_net_queues; 439 440 /* 441 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for 442 * the highest active stream. 443 */ 444 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] < 445 ar->hiac_stream_active_pri && 446 ar->cookie_count <= MAX_HI_COOKIE_NUM) 447 /* 448 * Give preference to the highest priority stream by 449 * dropping the packets which overflowed. 450 */ 451 return HTC_SEND_FULL_DROP; 452 453 stop_net_queues: 454 spin_lock_bh(&ar->lock); 455 set_bit(NETQ_STOPPED, &ar->flag); 456 spin_unlock_bh(&ar->lock); 457 netif_stop_queue(ar->net_dev); 458 459 return HTC_SEND_FULL_KEEP; 460 } 461 462 /* TODO this needs to be looked at */ 463 static void ath6kl_tx_clear_node_map(struct ath6kl *ar, 464 enum htc_endpoint_id eid, u32 map_no) 465 { 466 u32 i; 467 468 if (ar->nw_type != ADHOC_NETWORK) 469 return; 470 471 if (!ar->ibss_ps_enable) 472 return; 473 474 if (eid == ar->ctrl_ep) 475 return; 476 477 if (map_no == 0) 478 return; 479 480 map_no--; 481 ar->node_map[map_no].tx_pend--; 482 483 if (ar->node_map[map_no].tx_pend) 484 return; 485 486 if (map_no != (ar->node_num - 1)) 487 return; 488 489 for (i = ar->node_num; i > 0; i--) { 490 if (ar->node_map[i - 1].tx_pend) 491 break; 492 493 memset(&ar->node_map[i - 1], 0, 494 sizeof(struct ath6kl_node_mapping)); 495 ar->node_num--; 496 } 497 } 498 499 void ath6kl_tx_complete(void *context, struct list_head *packet_queue) 500 { 501 struct ath6kl *ar = context; 502 struct sk_buff_head skb_queue; 503 struct htc_packet *packet; 504 struct sk_buff *skb; 505 struct ath6kl_cookie *ath6kl_cookie; 506 u32 map_no = 0; 507 int status; 508 enum htc_endpoint_id eid; 509 bool wake_event = false; 510 bool flushing = false; 511 512 skb_queue_head_init(&skb_queue); 513 514 /* lock the driver as we update internal state */ 515 spin_lock_bh(&ar->lock); 516 517 /* reap completed packets */ 518 while (!list_empty(packet_queue)) { 519 520 packet = list_first_entry(packet_queue, struct htc_packet, 521 list); 522 list_del(&packet->list); 523 524 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt; 525 if (!ath6kl_cookie) 526 goto fatal; 527 528 status = packet->status; 529 skb = ath6kl_cookie->skb; 530 eid = packet->endpoint; 531 map_no = ath6kl_cookie->map_no; 532 533 if (!skb || !skb->data) 534 goto fatal; 535 536 packet->buf = skb->data; 537 538 __skb_queue_tail(&skb_queue, skb); 539 540 if (!status && (packet->act_len != skb->len)) 541 goto fatal; 542 543 ar->tx_pending[eid]--; 544 545 if (eid != ar->ctrl_ep) 546 ar->total_tx_data_pend--; 547 548 if (eid == ar->ctrl_ep) { 549 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag)) 550 clear_bit(WMI_CTRL_EP_FULL, &ar->flag); 551 552 if (ar->tx_pending[eid] == 0) 553 wake_event = true; 554 } 555 556 if (status) { 557 if (status == -ECANCELED) 558 /* a packet was flushed */ 559 flushing = true; 560 561 ar->net_stats.tx_errors++; 562 563 if (status != -ENOSPC) 564 ath6kl_err("tx error, status: 0x%x\n", status); 565 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 566 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 567 __func__, skb, packet->buf, packet->act_len, 568 eid, "error!"); 569 } else { 570 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 571 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 572 __func__, skb, packet->buf, packet->act_len, 573 eid, "OK"); 574 575 flushing = false; 576 ar->net_stats.tx_packets++; 577 ar->net_stats.tx_bytes += skb->len; 578 } 579 580 ath6kl_tx_clear_node_map(ar, eid, map_no); 581 582 ath6kl_free_cookie(ar, ath6kl_cookie); 583 584 if (test_bit(NETQ_STOPPED, &ar->flag)) 585 clear_bit(NETQ_STOPPED, &ar->flag); 586 } 587 588 spin_unlock_bh(&ar->lock); 589 590 __skb_queue_purge(&skb_queue); 591 592 if (test_bit(CONNECTED, &ar->flag)) { 593 if (!flushing) 594 netif_wake_queue(ar->net_dev); 595 } 596 597 if (wake_event) 598 wake_up(&ar->event_wq); 599 600 return; 601 602 fatal: 603 WARN_ON(1); 604 spin_unlock_bh(&ar->lock); 605 return; 606 } 607 608 void ath6kl_tx_data_cleanup(struct ath6kl *ar) 609 { 610 int i; 611 612 /* flush all the data (non-control) streams */ 613 for (i = 0; i < WMM_NUM_AC; i++) 614 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i], 615 ATH6KL_DATA_PKT_TAG); 616 } 617 618 /* Rx functions */ 619 620 static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev, 621 struct sk_buff *skb) 622 { 623 if (!skb) 624 return; 625 626 skb->dev = dev; 627 628 if (!(skb->dev->flags & IFF_UP)) { 629 dev_kfree_skb(skb); 630 return; 631 } 632 633 skb->protocol = eth_type_trans(skb, skb->dev); 634 635 netif_rx_ni(skb); 636 } 637 638 static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num) 639 { 640 struct sk_buff *skb; 641 642 while (num) { 643 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 644 if (!skb) { 645 ath6kl_err("netbuf allocation failed\n"); 646 return; 647 } 648 skb_queue_tail(q, skb); 649 num--; 650 } 651 } 652 653 static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr) 654 { 655 struct sk_buff *skb = NULL; 656 657 if (skb_queue_len(&p_aggr->free_q) < (AGGR_NUM_OF_FREE_NETBUFS >> 2)) 658 ath6kl_alloc_netbufs(&p_aggr->free_q, AGGR_NUM_OF_FREE_NETBUFS); 659 660 skb = skb_dequeue(&p_aggr->free_q); 661 662 return skb; 663 } 664 665 void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint) 666 { 667 struct ath6kl *ar = target->dev->ar; 668 struct sk_buff *skb; 669 int rx_buf; 670 int n_buf_refill; 671 struct htc_packet *packet; 672 struct list_head queue; 673 674 n_buf_refill = ATH6KL_MAX_RX_BUFFERS - 675 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint); 676 677 if (n_buf_refill <= 0) 678 return; 679 680 INIT_LIST_HEAD(&queue); 681 682 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 683 "%s: providing htc with %d buffers at eid=%d\n", 684 __func__, n_buf_refill, endpoint); 685 686 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) { 687 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 688 if (!skb) 689 break; 690 691 packet = (struct htc_packet *) skb->head; 692 set_htc_rxpkt_info(packet, skb, skb->data, 693 ATH6KL_BUFFER_SIZE, endpoint); 694 list_add_tail(&packet->list, &queue); 695 } 696 697 if (!list_empty(&queue)) 698 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue); 699 } 700 701 void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count) 702 { 703 struct htc_packet *packet; 704 struct sk_buff *skb; 705 706 while (count) { 707 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE); 708 if (!skb) 709 return; 710 711 packet = (struct htc_packet *) skb->head; 712 set_htc_rxpkt_info(packet, skb, skb->data, 713 ATH6KL_AMSDU_BUFFER_SIZE, 0); 714 spin_lock_bh(&ar->lock); 715 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue); 716 spin_unlock_bh(&ar->lock); 717 count--; 718 } 719 } 720 721 /* 722 * Callback to allocate a receive buffer for a pending packet. We use a 723 * pre-allocated list of buffers of maximum AMSDU size (4K). 724 */ 725 struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target, 726 enum htc_endpoint_id endpoint, 727 int len) 728 { 729 struct ath6kl *ar = target->dev->ar; 730 struct htc_packet *packet = NULL; 731 struct list_head *pkt_pos; 732 int refill_cnt = 0, depth = 0; 733 734 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n", 735 __func__, endpoint, len); 736 737 if ((len <= ATH6KL_BUFFER_SIZE) || 738 (len > ATH6KL_AMSDU_BUFFER_SIZE)) 739 return NULL; 740 741 spin_lock_bh(&ar->lock); 742 743 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 744 spin_unlock_bh(&ar->lock); 745 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS; 746 goto refill_buf; 747 } 748 749 packet = list_first_entry(&ar->amsdu_rx_buffer_queue, 750 struct htc_packet, list); 751 list_del(&packet->list); 752 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue) 753 depth++; 754 755 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth; 756 spin_unlock_bh(&ar->lock); 757 758 /* set actual endpoint ID */ 759 packet->endpoint = endpoint; 760 761 refill_buf: 762 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD) 763 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt); 764 765 return packet; 766 } 767 768 static void aggr_slice_amsdu(struct aggr_info *p_aggr, 769 struct rxtid *rxtid, struct sk_buff *skb) 770 { 771 struct sk_buff *new_skb; 772 struct ethhdr *hdr; 773 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len; 774 u8 *framep; 775 776 mac_hdr_len = sizeof(struct ethhdr); 777 framep = skb->data + mac_hdr_len; 778 amsdu_len = skb->len - mac_hdr_len; 779 780 while (amsdu_len > mac_hdr_len) { 781 hdr = (struct ethhdr *) framep; 782 payload_8023_len = ntohs(hdr->h_proto); 783 784 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN || 785 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) { 786 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n", 787 payload_8023_len); 788 break; 789 } 790 791 frame_8023_len = payload_8023_len + mac_hdr_len; 792 new_skb = aggr_get_free_skb(p_aggr); 793 if (!new_skb) { 794 ath6kl_err("no buffer available\n"); 795 break; 796 } 797 798 memcpy(new_skb->data, framep, frame_8023_len); 799 skb_put(new_skb, frame_8023_len); 800 if (ath6kl_wmi_dot3_2_dix(new_skb)) { 801 ath6kl_err("dot3_2_dix error\n"); 802 dev_kfree_skb(new_skb); 803 break; 804 } 805 806 skb_queue_tail(&rxtid->q, new_skb); 807 808 /* Is this the last subframe within this aggregate ? */ 809 if ((amsdu_len - frame_8023_len) == 0) 810 break; 811 812 /* Add the length of A-MSDU subframe padding bytes - 813 * Round to nearest word. 814 */ 815 frame_8023_len = ALIGN(frame_8023_len, 4); 816 817 framep += frame_8023_len; 818 amsdu_len -= frame_8023_len; 819 } 820 821 dev_kfree_skb(skb); 822 } 823 824 static void aggr_deque_frms(struct aggr_info *p_aggr, u8 tid, 825 u16 seq_no, u8 order) 826 { 827 struct sk_buff *skb; 828 struct rxtid *rxtid; 829 struct skb_hold_q *node; 830 u16 idx, idx_end, seq_end; 831 struct rxtid_stats *stats; 832 833 if (!p_aggr) 834 return; 835 836 rxtid = &p_aggr->rx_tid[tid]; 837 stats = &p_aggr->stat[tid]; 838 839 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 840 841 /* 842 * idx_end is typically the last possible frame in the window, 843 * but changes to 'the' seq_no, when BAR comes. If seq_no 844 * is non-zero, we will go up to that and stop. 845 * Note: last seq no in current window will occupy the same 846 * index position as index that is just previous to start. 847 * An imp point : if win_sz is 7, for seq_no space of 4095, 848 * then, there would be holes when sequence wrap around occurs. 849 * Target should judiciously choose the win_sz, based on 850 * this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz 851 * 2, 4, 8, 16 win_sz works fine). 852 * We must deque from "idx" to "idx_end", including both. 853 */ 854 seq_end = seq_no ? seq_no : rxtid->seq_next; 855 idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz); 856 857 spin_lock_bh(&rxtid->lock); 858 859 do { 860 node = &rxtid->hold_q[idx]; 861 if ((order == 1) && (!node->skb)) 862 break; 863 864 if (node->skb) { 865 if (node->is_amsdu) 866 aggr_slice_amsdu(p_aggr, rxtid, node->skb); 867 else 868 skb_queue_tail(&rxtid->q, node->skb); 869 node->skb = NULL; 870 } else 871 stats->num_hole++; 872 873 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next); 874 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 875 } while (idx != idx_end); 876 877 spin_unlock_bh(&rxtid->lock); 878 879 stats->num_delivered += skb_queue_len(&rxtid->q); 880 881 while ((skb = skb_dequeue(&rxtid->q))) 882 ath6kl_deliver_frames_to_nw_stack(p_aggr->dev, skb); 883 } 884 885 static bool aggr_process_recv_frm(struct aggr_info *agg_info, u8 tid, 886 u16 seq_no, 887 bool is_amsdu, struct sk_buff *frame) 888 { 889 struct rxtid *rxtid; 890 struct rxtid_stats *stats; 891 struct sk_buff *skb; 892 struct skb_hold_q *node; 893 u16 idx, st, cur, end; 894 bool is_queued = false; 895 u16 extended_end; 896 897 rxtid = &agg_info->rx_tid[tid]; 898 stats = &agg_info->stat[tid]; 899 900 stats->num_into_aggr++; 901 902 if (!rxtid->aggr) { 903 if (is_amsdu) { 904 aggr_slice_amsdu(agg_info, rxtid, frame); 905 is_queued = true; 906 stats->num_amsdu++; 907 while ((skb = skb_dequeue(&rxtid->q))) 908 ath6kl_deliver_frames_to_nw_stack(agg_info->dev, 909 skb); 910 } 911 return is_queued; 912 } 913 914 /* Check the incoming sequence no, if it's in the window */ 915 st = rxtid->seq_next; 916 cur = seq_no; 917 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO; 918 919 if (((st < end) && (cur < st || cur > end)) || 920 ((st > end) && (cur > end) && (cur < st))) { 921 extended_end = (end + rxtid->hold_q_sz - 1) & 922 ATH6KL_MAX_SEQ_NO; 923 924 if (((end < extended_end) && 925 (cur < end || cur > extended_end)) || 926 ((end > extended_end) && (cur > extended_end) && 927 (cur < end))) { 928 aggr_deque_frms(agg_info, tid, 0, 0); 929 if (cur >= rxtid->hold_q_sz - 1) 930 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1); 931 else 932 rxtid->seq_next = ATH6KL_MAX_SEQ_NO - 933 (rxtid->hold_q_sz - 2 - cur); 934 } else { 935 /* 936 * Dequeue only those frames that are outside the 937 * new shifted window. 938 */ 939 if (cur >= rxtid->hold_q_sz - 1) 940 st = cur - (rxtid->hold_q_sz - 1); 941 else 942 st = ATH6KL_MAX_SEQ_NO - 943 (rxtid->hold_q_sz - 2 - cur); 944 945 aggr_deque_frms(agg_info, tid, st, 0); 946 } 947 948 stats->num_oow++; 949 } 950 951 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz); 952 953 node = &rxtid->hold_q[idx]; 954 955 spin_lock_bh(&rxtid->lock); 956 957 /* 958 * Is the cur frame duplicate or something beyond our window(hold_q 959 * -> which is 2x, already)? 960 * 961 * 1. Duplicate is easy - drop incoming frame. 962 * 2. Not falling in current sliding window. 963 * 2a. is the frame_seq_no preceding current tid_seq_no? 964 * -> drop the frame. perhaps sender did not get our ACK. 965 * this is taken care of above. 966 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ); 967 * -> Taken care of it above, by moving window forward. 968 */ 969 dev_kfree_skb(node->skb); 970 stats->num_dups++; 971 972 node->skb = frame; 973 is_queued = true; 974 node->is_amsdu = is_amsdu; 975 node->seq_no = seq_no; 976 977 if (node->is_amsdu) 978 stats->num_amsdu++; 979 else 980 stats->num_mpdu++; 981 982 spin_unlock_bh(&rxtid->lock); 983 984 aggr_deque_frms(agg_info, tid, 0, 1); 985 986 if (agg_info->timer_scheduled) 987 rxtid->progress = true; 988 else 989 for (idx = 0 ; idx < rxtid->hold_q_sz; idx++) { 990 if (rxtid->hold_q[idx].skb) { 991 /* 992 * There is a frame in the queue and no 993 * timer so start a timer to ensure that 994 * the frame doesn't remain stuck 995 * forever. 996 */ 997 agg_info->timer_scheduled = true; 998 mod_timer(&agg_info->timer, 999 (jiffies + 1000 HZ * (AGGR_RX_TIMEOUT) / 1000)); 1001 rxtid->progress = false; 1002 rxtid->timer_mon = true; 1003 break; 1004 } 1005 } 1006 1007 return is_queued; 1008 } 1009 1010 void ath6kl_rx(struct htc_target *target, struct htc_packet *packet) 1011 { 1012 struct ath6kl *ar = target->dev->ar; 1013 struct sk_buff *skb = packet->pkt_cntxt; 1014 struct wmi_rx_meta_v2 *meta; 1015 struct wmi_data_hdr *dhdr; 1016 int min_hdr_len; 1017 u8 meta_type, dot11_hdr = 0; 1018 int status = packet->status; 1019 enum htc_endpoint_id ept = packet->endpoint; 1020 bool is_amsdu, prev_ps, ps_state = false; 1021 struct ath6kl_sta *conn = NULL; 1022 struct sk_buff *skb1 = NULL; 1023 struct ethhdr *datap = NULL; 1024 u16 seq_no, offset; 1025 u8 tid; 1026 1027 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 1028 "%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d", 1029 __func__, ar, ept, skb, packet->buf, 1030 packet->act_len, status); 1031 1032 if (status || !(skb->data + HTC_HDR_LENGTH)) { 1033 ar->net_stats.rx_errors++; 1034 dev_kfree_skb(skb); 1035 return; 1036 } 1037 1038 /* 1039 * Take lock to protect buffer counts and adaptive power throughput 1040 * state. 1041 */ 1042 spin_lock_bh(&ar->lock); 1043 1044 ar->net_stats.rx_packets++; 1045 ar->net_stats.rx_bytes += packet->act_len; 1046 1047 spin_unlock_bh(&ar->lock); 1048 1049 skb_put(skb, packet->act_len + HTC_HDR_LENGTH); 1050 skb_pull(skb, HTC_HDR_LENGTH); 1051 1052 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, skb->data, skb->len); 1053 1054 skb->dev = ar->net_dev; 1055 1056 if (!test_bit(WMI_ENABLED, &ar->flag)) { 1057 if (EPPING_ALIGNMENT_PAD > 0) 1058 skb_pull(skb, EPPING_ALIGNMENT_PAD); 1059 ath6kl_deliver_frames_to_nw_stack(ar->net_dev, skb); 1060 return; 1061 } 1062 1063 if (ept == ar->ctrl_ep) { 1064 ath6kl_wmi_control_rx(ar->wmi, skb); 1065 return; 1066 } 1067 1068 min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) + 1069 sizeof(struct ath6kl_llc_snap_hdr); 1070 1071 dhdr = (struct wmi_data_hdr *) skb->data; 1072 1073 /* 1074 * In the case of AP mode we may receive NULL data frames 1075 * that do not have LLC hdr. They are 16 bytes in size. 1076 * Allow these frames in the AP mode. 1077 */ 1078 if (ar->nw_type != AP_NETWORK && 1079 ((packet->act_len < min_hdr_len) || 1080 (packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) { 1081 ath6kl_info("frame len is too short or too long\n"); 1082 ar->net_stats.rx_errors++; 1083 ar->net_stats.rx_length_errors++; 1084 dev_kfree_skb(skb); 1085 return; 1086 } 1087 1088 /* Get the Power save state of the STA */ 1089 if (ar->nw_type == AP_NETWORK) { 1090 meta_type = wmi_data_hdr_get_meta(dhdr); 1091 1092 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) & 1093 WMI_DATA_HDR_PS_MASK); 1094 1095 offset = sizeof(struct wmi_data_hdr); 1096 1097 switch (meta_type) { 1098 case 0: 1099 break; 1100 case WMI_META_VERSION_1: 1101 offset += sizeof(struct wmi_rx_meta_v1); 1102 break; 1103 case WMI_META_VERSION_2: 1104 offset += sizeof(struct wmi_rx_meta_v2); 1105 break; 1106 default: 1107 break; 1108 } 1109 1110 datap = (struct ethhdr *) (skb->data + offset); 1111 conn = ath6kl_find_sta(ar, datap->h_source); 1112 1113 if (!conn) { 1114 dev_kfree_skb(skb); 1115 return; 1116 } 1117 1118 /* 1119 * If there is a change in PS state of the STA, 1120 * take appropriate steps: 1121 * 1122 * 1. If Sleep-->Awake, flush the psq for the STA 1123 * Clear the PVB for the STA. 1124 * 2. If Awake-->Sleep, Starting queueing frames 1125 * the STA. 1126 */ 1127 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP); 1128 1129 if (ps_state) 1130 conn->sta_flags |= STA_PS_SLEEP; 1131 else 1132 conn->sta_flags &= ~STA_PS_SLEEP; 1133 1134 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) { 1135 if (!(conn->sta_flags & STA_PS_SLEEP)) { 1136 struct sk_buff *skbuff = NULL; 1137 1138 spin_lock_bh(&conn->psq_lock); 1139 while ((skbuff = skb_dequeue(&conn->psq)) 1140 != NULL) { 1141 spin_unlock_bh(&conn->psq_lock); 1142 ath6kl_data_tx(skbuff, ar->net_dev); 1143 spin_lock_bh(&conn->psq_lock); 1144 } 1145 spin_unlock_bh(&conn->psq_lock); 1146 /* Clear the PVB for this STA */ 1147 ath6kl_wmi_set_pvb_cmd(ar->wmi, conn->aid, 0); 1148 } 1149 } 1150 1151 /* drop NULL data frames here */ 1152 if ((packet->act_len < min_hdr_len) || 1153 (packet->act_len > 1154 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) { 1155 dev_kfree_skb(skb); 1156 return; 1157 } 1158 } 1159 1160 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false; 1161 tid = wmi_data_hdr_get_up(dhdr); 1162 seq_no = wmi_data_hdr_get_seqno(dhdr); 1163 meta_type = wmi_data_hdr_get_meta(dhdr); 1164 dot11_hdr = wmi_data_hdr_get_dot11(dhdr); 1165 skb_pull(skb, sizeof(struct wmi_data_hdr)); 1166 1167 switch (meta_type) { 1168 case WMI_META_VERSION_1: 1169 skb_pull(skb, sizeof(struct wmi_rx_meta_v1)); 1170 break; 1171 case WMI_META_VERSION_2: 1172 meta = (struct wmi_rx_meta_v2 *) skb->data; 1173 if (meta->csum_flags & 0x1) { 1174 skb->ip_summed = CHECKSUM_COMPLETE; 1175 skb->csum = (__force __wsum) meta->csum; 1176 } 1177 skb_pull(skb, sizeof(struct wmi_rx_meta_v2)); 1178 break; 1179 default: 1180 break; 1181 } 1182 1183 if (dot11_hdr) 1184 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb); 1185 else if (!is_amsdu) 1186 status = ath6kl_wmi_dot3_2_dix(skb); 1187 1188 if (status) { 1189 /* 1190 * Drop frames that could not be processed (lack of 1191 * memory, etc.) 1192 */ 1193 dev_kfree_skb(skb); 1194 return; 1195 } 1196 1197 if (!(ar->net_dev->flags & IFF_UP)) { 1198 dev_kfree_skb(skb); 1199 return; 1200 } 1201 1202 if (ar->nw_type == AP_NETWORK) { 1203 datap = (struct ethhdr *) skb->data; 1204 if (is_multicast_ether_addr(datap->h_dest)) 1205 /* 1206 * Bcast/Mcast frames should be sent to the 1207 * OS stack as well as on the air. 1208 */ 1209 skb1 = skb_copy(skb, GFP_ATOMIC); 1210 else { 1211 /* 1212 * Search for a connected STA with dstMac 1213 * as the Mac address. If found send the 1214 * frame to it on the air else send the 1215 * frame up the stack. 1216 */ 1217 struct ath6kl_sta *conn = NULL; 1218 conn = ath6kl_find_sta(ar, datap->h_dest); 1219 1220 if (conn && ar->intra_bss) { 1221 skb1 = skb; 1222 skb = NULL; 1223 } else if (conn && !ar->intra_bss) { 1224 dev_kfree_skb(skb); 1225 skb = NULL; 1226 } 1227 } 1228 if (skb1) 1229 ath6kl_data_tx(skb1, ar->net_dev); 1230 } 1231 1232 if (!aggr_process_recv_frm(ar->aggr_cntxt, tid, seq_no, 1233 is_amsdu, skb)) 1234 ath6kl_deliver_frames_to_nw_stack(ar->net_dev, skb); 1235 } 1236 1237 static void aggr_timeout(unsigned long arg) 1238 { 1239 u8 i, j; 1240 struct aggr_info *p_aggr = (struct aggr_info *) arg; 1241 struct rxtid *rxtid; 1242 struct rxtid_stats *stats; 1243 1244 for (i = 0; i < NUM_OF_TIDS; i++) { 1245 rxtid = &p_aggr->rx_tid[i]; 1246 stats = &p_aggr->stat[i]; 1247 1248 if (!rxtid->aggr || !rxtid->timer_mon || rxtid->progress) 1249 continue; 1250 1251 /* 1252 * FIXME: these timeouts happen quite fruently, something 1253 * line once within 60 seconds. Investigate why. 1254 */ 1255 stats->num_timeouts++; 1256 ath6kl_dbg(ATH6KL_DBG_AGGR, 1257 "aggr timeout (st %d end %d)\n", 1258 rxtid->seq_next, 1259 ((rxtid->seq_next + rxtid->hold_q_sz-1) & 1260 ATH6KL_MAX_SEQ_NO)); 1261 aggr_deque_frms(p_aggr, i, 0, 0); 1262 } 1263 1264 p_aggr->timer_scheduled = false; 1265 1266 for (i = 0; i < NUM_OF_TIDS; i++) { 1267 rxtid = &p_aggr->rx_tid[i]; 1268 1269 if (rxtid->aggr && rxtid->hold_q) { 1270 for (j = 0; j < rxtid->hold_q_sz; j++) { 1271 if (rxtid->hold_q[j].skb) { 1272 p_aggr->timer_scheduled = true; 1273 rxtid->timer_mon = true; 1274 rxtid->progress = false; 1275 break; 1276 } 1277 } 1278 1279 if (j >= rxtid->hold_q_sz) 1280 rxtid->timer_mon = false; 1281 } 1282 } 1283 1284 if (p_aggr->timer_scheduled) 1285 mod_timer(&p_aggr->timer, 1286 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT)); 1287 } 1288 1289 static void aggr_delete_tid_state(struct aggr_info *p_aggr, u8 tid) 1290 { 1291 struct rxtid *rxtid; 1292 struct rxtid_stats *stats; 1293 1294 if (!p_aggr || tid >= NUM_OF_TIDS) 1295 return; 1296 1297 rxtid = &p_aggr->rx_tid[tid]; 1298 stats = &p_aggr->stat[tid]; 1299 1300 if (rxtid->aggr) 1301 aggr_deque_frms(p_aggr, tid, 0, 0); 1302 1303 rxtid->aggr = false; 1304 rxtid->progress = false; 1305 rxtid->timer_mon = false; 1306 rxtid->win_sz = 0; 1307 rxtid->seq_next = 0; 1308 rxtid->hold_q_sz = 0; 1309 1310 kfree(rxtid->hold_q); 1311 rxtid->hold_q = NULL; 1312 1313 memset(stats, 0, sizeof(struct rxtid_stats)); 1314 } 1315 1316 void aggr_recv_addba_req_evt(struct ath6kl *ar, u8 tid, u16 seq_no, u8 win_sz) 1317 { 1318 struct aggr_info *p_aggr = ar->aggr_cntxt; 1319 struct rxtid *rxtid; 1320 struct rxtid_stats *stats; 1321 u16 hold_q_size; 1322 1323 if (!p_aggr) 1324 return; 1325 1326 rxtid = &p_aggr->rx_tid[tid]; 1327 stats = &p_aggr->stat[tid]; 1328 1329 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX) 1330 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n", 1331 __func__, win_sz, tid); 1332 1333 if (rxtid->aggr) 1334 aggr_delete_tid_state(p_aggr, tid); 1335 1336 rxtid->seq_next = seq_no; 1337 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q); 1338 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL); 1339 if (!rxtid->hold_q) 1340 return; 1341 1342 rxtid->win_sz = win_sz; 1343 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz); 1344 if (!skb_queue_empty(&rxtid->q)) 1345 return; 1346 1347 rxtid->aggr = true; 1348 } 1349 1350 struct aggr_info *aggr_init(struct net_device *dev) 1351 { 1352 struct aggr_info *p_aggr = NULL; 1353 struct rxtid *rxtid; 1354 u8 i; 1355 1356 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL); 1357 if (!p_aggr) { 1358 ath6kl_err("failed to alloc memory for aggr_node\n"); 1359 return NULL; 1360 } 1361 1362 p_aggr->aggr_sz = AGGR_SZ_DEFAULT; 1363 p_aggr->dev = dev; 1364 init_timer(&p_aggr->timer); 1365 p_aggr->timer.function = aggr_timeout; 1366 p_aggr->timer.data = (unsigned long) p_aggr; 1367 1368 p_aggr->timer_scheduled = false; 1369 skb_queue_head_init(&p_aggr->free_q); 1370 1371 ath6kl_alloc_netbufs(&p_aggr->free_q, AGGR_NUM_OF_FREE_NETBUFS); 1372 1373 for (i = 0; i < NUM_OF_TIDS; i++) { 1374 rxtid = &p_aggr->rx_tid[i]; 1375 rxtid->aggr = false; 1376 rxtid->progress = false; 1377 rxtid->timer_mon = false; 1378 skb_queue_head_init(&rxtid->q); 1379 spin_lock_init(&rxtid->lock); 1380 } 1381 1382 return p_aggr; 1383 } 1384 1385 void aggr_recv_delba_req_evt(struct ath6kl *ar, u8 tid) 1386 { 1387 struct aggr_info *p_aggr = ar->aggr_cntxt; 1388 struct rxtid *rxtid; 1389 1390 if (!p_aggr) 1391 return; 1392 1393 rxtid = &p_aggr->rx_tid[tid]; 1394 1395 if (rxtid->aggr) 1396 aggr_delete_tid_state(p_aggr, tid); 1397 } 1398 1399 void aggr_reset_state(struct aggr_info *aggr_info) 1400 { 1401 u8 tid; 1402 1403 for (tid = 0; tid < NUM_OF_TIDS; tid++) 1404 aggr_delete_tid_state(aggr_info, tid); 1405 } 1406 1407 /* clean up our amsdu buffer list */ 1408 void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar) 1409 { 1410 struct htc_packet *packet, *tmp_pkt; 1411 1412 spin_lock_bh(&ar->lock); 1413 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 1414 spin_unlock_bh(&ar->lock); 1415 return; 1416 } 1417 1418 list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue, 1419 list) { 1420 list_del(&packet->list); 1421 spin_unlock_bh(&ar->lock); 1422 dev_kfree_skb(packet->pkt_cntxt); 1423 spin_lock_bh(&ar->lock); 1424 } 1425 1426 spin_unlock_bh(&ar->lock); 1427 } 1428 1429 void aggr_module_destroy(struct aggr_info *aggr_info) 1430 { 1431 struct rxtid *rxtid; 1432 u8 i, k; 1433 1434 if (!aggr_info) 1435 return; 1436 1437 if (aggr_info->timer_scheduled) { 1438 del_timer(&aggr_info->timer); 1439 aggr_info->timer_scheduled = false; 1440 } 1441 1442 for (i = 0; i < NUM_OF_TIDS; i++) { 1443 rxtid = &aggr_info->rx_tid[i]; 1444 if (rxtid->hold_q) { 1445 for (k = 0; k < rxtid->hold_q_sz; k++) 1446 dev_kfree_skb(rxtid->hold_q[k].skb); 1447 kfree(rxtid->hold_q); 1448 } 1449 1450 skb_queue_purge(&rxtid->q); 1451 } 1452 1453 skb_queue_purge(&aggr_info->free_q); 1454 kfree(aggr_info); 1455 } 1456