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_process_uapsdq(struct ath6kl_sta *conn, 81 struct ath6kl_vif *vif, 82 struct sk_buff *skb, 83 u32 *flags) 84 { 85 struct ath6kl *ar = vif->ar; 86 bool is_apsdq_empty = false; 87 struct ethhdr *datap = (struct ethhdr *) skb->data; 88 u8 up = 0, traffic_class, *ip_hdr; 89 u16 ether_type; 90 struct ath6kl_llc_snap_hdr *llc_hdr; 91 92 if (conn->sta_flags & STA_PS_APSD_TRIGGER) { 93 /* 94 * This tx is because of a uAPSD trigger, determine 95 * more and EOSP bit. Set EOSP if queue is empty 96 * or sufficient frames are delivered for this trigger. 97 */ 98 spin_lock_bh(&conn->psq_lock); 99 if (!skb_queue_empty(&conn->apsdq)) 100 *flags |= WMI_DATA_HDR_FLAGS_MORE; 101 else if (conn->sta_flags & STA_PS_APSD_EOSP) 102 *flags |= WMI_DATA_HDR_FLAGS_EOSP; 103 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 104 spin_unlock_bh(&conn->psq_lock); 105 return false; 106 } else if (!conn->apsd_info) 107 return false; 108 109 if (test_bit(WMM_ENABLED, &vif->flags)) { 110 ether_type = be16_to_cpu(datap->h_proto); 111 if (is_ethertype(ether_type)) { 112 /* packet is in DIX format */ 113 ip_hdr = (u8 *)(datap + 1); 114 } else { 115 /* packet is in 802.3 format */ 116 llc_hdr = (struct ath6kl_llc_snap_hdr *) 117 (datap + 1); 118 ether_type = be16_to_cpu(llc_hdr->eth_type); 119 ip_hdr = (u8 *)(llc_hdr + 1); 120 } 121 122 if (ether_type == IP_ETHERTYPE) 123 up = ath6kl_wmi_determine_user_priority( 124 ip_hdr, 0); 125 } 126 127 traffic_class = ath6kl_wmi_get_traffic_class(up); 128 129 if ((conn->apsd_info & (1 << traffic_class)) == 0) 130 return false; 131 132 /* Queue the frames if the STA is sleeping */ 133 spin_lock_bh(&conn->psq_lock); 134 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 135 skb_queue_tail(&conn->apsdq, skb); 136 spin_unlock_bh(&conn->psq_lock); 137 138 /* 139 * If this is the first pkt getting queued 140 * for this STA, update the PVB for this STA 141 */ 142 if (is_apsdq_empty) { 143 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 144 vif->fw_vif_idx, 145 conn->aid, 1, 0); 146 } 147 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 148 149 return true; 150 } 151 152 static bool ath6kl_process_psq(struct ath6kl_sta *conn, 153 struct ath6kl_vif *vif, 154 struct sk_buff *skb, 155 u32 *flags) 156 { 157 bool is_psq_empty = false; 158 struct ath6kl *ar = vif->ar; 159 160 if (conn->sta_flags & STA_PS_POLLED) { 161 spin_lock_bh(&conn->psq_lock); 162 if (!skb_queue_empty(&conn->psq)) 163 *flags |= WMI_DATA_HDR_FLAGS_MORE; 164 spin_unlock_bh(&conn->psq_lock); 165 return false; 166 } 167 168 /* Queue the frames if the STA is sleeping */ 169 spin_lock_bh(&conn->psq_lock); 170 is_psq_empty = skb_queue_empty(&conn->psq); 171 skb_queue_tail(&conn->psq, skb); 172 spin_unlock_bh(&conn->psq_lock); 173 174 /* 175 * If this is the first pkt getting queued 176 * for this STA, update the PVB for this 177 * STA. 178 */ 179 if (is_psq_empty) 180 ath6kl_wmi_set_pvb_cmd(ar->wmi, 181 vif->fw_vif_idx, 182 conn->aid, 1); 183 return true; 184 } 185 186 static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb, 187 u32 *flags) 188 { 189 struct ethhdr *datap = (struct ethhdr *) skb->data; 190 struct ath6kl_sta *conn = NULL; 191 bool ps_queued = false; 192 struct ath6kl *ar = vif->ar; 193 194 if (is_multicast_ether_addr(datap->h_dest)) { 195 u8 ctr = 0; 196 bool q_mcast = false; 197 198 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) { 199 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) { 200 q_mcast = true; 201 break; 202 } 203 } 204 205 if (q_mcast) { 206 /* 207 * If this transmit is not because of a Dtim Expiry 208 * q it. 209 */ 210 if (!test_bit(DTIM_EXPIRED, &vif->flags)) { 211 bool is_mcastq_empty = false; 212 213 spin_lock_bh(&ar->mcastpsq_lock); 214 is_mcastq_empty = 215 skb_queue_empty(&ar->mcastpsq); 216 skb_queue_tail(&ar->mcastpsq, skb); 217 spin_unlock_bh(&ar->mcastpsq_lock); 218 219 /* 220 * If this is the first Mcast pkt getting 221 * queued indicate to the target to set the 222 * BitmapControl LSB of the TIM IE. 223 */ 224 if (is_mcastq_empty) 225 ath6kl_wmi_set_pvb_cmd(ar->wmi, 226 vif->fw_vif_idx, 227 MCAST_AID, 1); 228 229 ps_queued = true; 230 } else { 231 /* 232 * This transmit is because of Dtim expiry. 233 * Determine if MoreData bit has to be set. 234 */ 235 spin_lock_bh(&ar->mcastpsq_lock); 236 if (!skb_queue_empty(&ar->mcastpsq)) 237 *flags |= WMI_DATA_HDR_FLAGS_MORE; 238 spin_unlock_bh(&ar->mcastpsq_lock); 239 } 240 } 241 } else { 242 conn = ath6kl_find_sta(vif, datap->h_dest); 243 if (!conn) { 244 dev_kfree_skb(skb); 245 246 /* Inform the caller that the skb is consumed */ 247 return true; 248 } 249 250 if (conn->sta_flags & STA_PS_SLEEP) { 251 ps_queued = ath6kl_process_uapsdq(conn, 252 vif, skb, flags); 253 if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD)) 254 ps_queued = ath6kl_process_psq(conn, 255 vif, skb, flags); 256 } 257 } 258 return ps_queued; 259 } 260 261 /* Tx functions */ 262 263 int ath6kl_control_tx(void *devt, struct sk_buff *skb, 264 enum htc_endpoint_id eid) 265 { 266 struct ath6kl *ar = devt; 267 int status = 0; 268 struct ath6kl_cookie *cookie = NULL; 269 270 spin_lock_bh(&ar->lock); 271 272 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 273 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__, 274 skb, skb->len, eid); 275 276 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) { 277 /* 278 * Control endpoint is full, don't allocate resources, we 279 * are just going to drop this packet. 280 */ 281 cookie = NULL; 282 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n", 283 skb, skb->len); 284 } else 285 cookie = ath6kl_alloc_cookie(ar); 286 287 if (cookie == NULL) { 288 spin_unlock_bh(&ar->lock); 289 status = -ENOMEM; 290 goto fail_ctrl_tx; 291 } 292 293 ar->tx_pending[eid]++; 294 295 if (eid != ar->ctrl_ep) 296 ar->total_tx_data_pend++; 297 298 spin_unlock_bh(&ar->lock); 299 300 cookie->skb = skb; 301 cookie->map_no = 0; 302 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 303 eid, ATH6KL_CONTROL_PKT_TAG); 304 305 /* 306 * This interface is asynchronous, if there is an error, cleanup 307 * will happen in the TX completion callback. 308 */ 309 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 310 311 return 0; 312 313 fail_ctrl_tx: 314 dev_kfree_skb(skb); 315 return status; 316 } 317 318 int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev) 319 { 320 struct ath6kl *ar = ath6kl_priv(dev); 321 struct ath6kl_cookie *cookie = NULL; 322 enum htc_endpoint_id eid = ENDPOINT_UNUSED; 323 struct ath6kl_vif *vif = netdev_priv(dev); 324 u32 map_no = 0; 325 u16 htc_tag = ATH6KL_DATA_PKT_TAG; 326 u8 ac = 99 ; /* initialize to unmapped ac */ 327 bool chk_adhoc_ps_mapping = false; 328 int ret; 329 struct wmi_tx_meta_v2 meta_v2; 330 void *meta; 331 u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed; 332 u8 meta_ver = 0; 333 u32 flags = 0; 334 335 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 336 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__, 337 skb, skb->data, skb->len); 338 339 /* If target is not associated */ 340 if (!test_bit(CONNECTED, &vif->flags)) { 341 dev_kfree_skb(skb); 342 return 0; 343 } 344 345 if (!test_bit(WMI_READY, &ar->flag)) 346 goto fail_tx; 347 348 /* AP mode Power saving processing */ 349 if (vif->nw_type == AP_NETWORK) { 350 if (ath6kl_powersave_ap(vif, skb, &flags)) 351 return 0; 352 } 353 354 if (test_bit(WMI_ENABLED, &ar->flag)) { 355 if ((dev->features & NETIF_F_IP_CSUM) && 356 (csum == CHECKSUM_PARTIAL)) { 357 csum_start = skb->csum_start - 358 (skb_network_header(skb) - skb->head) + 359 sizeof(struct ath6kl_llc_snap_hdr); 360 csum_dest = skb->csum_offset + csum_start; 361 } 362 363 if (skb_headroom(skb) < dev->needed_headroom) { 364 struct sk_buff *tmp_skb = skb; 365 366 skb = skb_realloc_headroom(skb, dev->needed_headroom); 367 kfree_skb(tmp_skb); 368 if (skb == NULL) { 369 vif->net_stats.tx_dropped++; 370 return 0; 371 } 372 } 373 374 if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) { 375 ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n"); 376 goto fail_tx; 377 } 378 379 if ((dev->features & NETIF_F_IP_CSUM) && 380 (csum == CHECKSUM_PARTIAL)) { 381 meta_v2.csum_start = csum_start; 382 meta_v2.csum_dest = csum_dest; 383 384 /* instruct target to calculate checksum */ 385 meta_v2.csum_flags = WMI_META_V2_FLAG_CSUM_OFFLOAD; 386 meta_ver = WMI_META_VERSION_2; 387 meta = &meta_v2; 388 } else { 389 meta_ver = 0; 390 meta = NULL; 391 } 392 393 ret = ath6kl_wmi_data_hdr_add(ar->wmi, skb, 394 DATA_MSGTYPE, flags, 0, 395 meta_ver, 396 meta, vif->fw_vif_idx); 397 398 if (ret) { 399 ath6kl_warn("failed to add wmi data header:%d\n" 400 , ret); 401 goto fail_tx; 402 } 403 404 if ((vif->nw_type == ADHOC_NETWORK) && 405 ar->ibss_ps_enable && test_bit(CONNECTED, &vif->flags)) 406 chk_adhoc_ps_mapping = true; 407 else { 408 /* get the stream mapping */ 409 ret = ath6kl_wmi_implicit_create_pstream(ar->wmi, 410 vif->fw_vif_idx, skb, 411 0, test_bit(WMM_ENABLED, &vif->flags), &ac); 412 if (ret) 413 goto fail_tx; 414 } 415 } else 416 goto fail_tx; 417 418 spin_lock_bh(&ar->lock); 419 420 if (chk_adhoc_ps_mapping) 421 eid = ath6kl_ibss_map_epid(skb, dev, &map_no); 422 else 423 eid = ar->ac2ep_map[ac]; 424 425 if (eid == 0 || eid == ENDPOINT_UNUSED) { 426 ath6kl_err("eid %d is not mapped!\n", eid); 427 spin_unlock_bh(&ar->lock); 428 goto fail_tx; 429 } 430 431 /* allocate resource for this packet */ 432 cookie = ath6kl_alloc_cookie(ar); 433 434 if (!cookie) { 435 spin_unlock_bh(&ar->lock); 436 goto fail_tx; 437 } 438 439 /* update counts while the lock is held */ 440 ar->tx_pending[eid]++; 441 ar->total_tx_data_pend++; 442 443 spin_unlock_bh(&ar->lock); 444 445 if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) && 446 skb_cloned(skb)) { 447 /* 448 * We will touch (move the buffer data to align it. Since the 449 * skb buffer is cloned and not only the header is changed, we 450 * have to copy it to allow the changes. Since we are copying 451 * the data here, we may as well align it by reserving suitable 452 * headroom to avoid the memmove in ath6kl_htc_tx_buf_align(). 453 */ 454 struct sk_buff *nskb; 455 456 nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC); 457 if (nskb == NULL) 458 goto fail_tx; 459 kfree_skb(skb); 460 skb = nskb; 461 } 462 463 cookie->skb = skb; 464 cookie->map_no = map_no; 465 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 466 eid, htc_tag); 467 468 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ", 469 skb->data, skb->len); 470 471 /* 472 * HTC interface is asynchronous, if this fails, cleanup will 473 * happen in the ath6kl_tx_complete callback. 474 */ 475 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 476 477 return 0; 478 479 fail_tx: 480 dev_kfree_skb(skb); 481 482 vif->net_stats.tx_dropped++; 483 vif->net_stats.tx_aborted_errors++; 484 485 return 0; 486 } 487 488 /* indicate tx activity or inactivity on a WMI stream */ 489 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active) 490 { 491 struct ath6kl *ar = devt; 492 enum htc_endpoint_id eid; 493 int i; 494 495 eid = ar->ac2ep_map[traffic_class]; 496 497 if (!test_bit(WMI_ENABLED, &ar->flag)) 498 goto notify_htc; 499 500 spin_lock_bh(&ar->lock); 501 502 ar->ac_stream_active[traffic_class] = active; 503 504 if (active) { 505 /* 506 * Keep track of the active stream with the highest 507 * priority. 508 */ 509 if (ar->ac_stream_pri_map[traffic_class] > 510 ar->hiac_stream_active_pri) 511 /* set the new highest active priority */ 512 ar->hiac_stream_active_pri = 513 ar->ac_stream_pri_map[traffic_class]; 514 515 } else { 516 /* 517 * We may have to search for the next active stream 518 * that is the highest priority. 519 */ 520 if (ar->hiac_stream_active_pri == 521 ar->ac_stream_pri_map[traffic_class]) { 522 /* 523 * The highest priority stream just went inactive 524 * reset and search for the "next" highest "active" 525 * priority stream. 526 */ 527 ar->hiac_stream_active_pri = 0; 528 529 for (i = 0; i < WMM_NUM_AC; i++) { 530 if (ar->ac_stream_active[i] && 531 (ar->ac_stream_pri_map[i] > 532 ar->hiac_stream_active_pri)) 533 /* 534 * Set the new highest active 535 * priority. 536 */ 537 ar->hiac_stream_active_pri = 538 ar->ac_stream_pri_map[i]; 539 } 540 } 541 } 542 543 spin_unlock_bh(&ar->lock); 544 545 notify_htc: 546 /* notify HTC, this may cause credit distribution changes */ 547 ath6kl_htc_indicate_activity_change(ar->htc_target, eid, active); 548 } 549 550 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target, 551 struct htc_packet *packet) 552 { 553 struct ath6kl *ar = target->dev->ar; 554 struct ath6kl_vif *vif; 555 enum htc_endpoint_id endpoint = packet->endpoint; 556 enum htc_send_full_action action = HTC_SEND_FULL_KEEP; 557 558 if (endpoint == ar->ctrl_ep) { 559 /* 560 * Under normal WMI if this is getting full, then something 561 * is running rampant the host should not be exhausting the 562 * WMI queue with too many commands the only exception to 563 * this is during testing using endpointping. 564 */ 565 set_bit(WMI_CTRL_EP_FULL, &ar->flag); 566 ath6kl_err("wmi ctrl ep is full\n"); 567 return action; 568 } 569 570 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG) 571 return action; 572 573 /* 574 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for 575 * the highest active stream. 576 */ 577 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] < 578 ar->hiac_stream_active_pri && 579 ar->cookie_count <= MAX_HI_COOKIE_NUM) 580 /* 581 * Give preference to the highest priority stream by 582 * dropping the packets which overflowed. 583 */ 584 action = HTC_SEND_FULL_DROP; 585 586 /* FIXME: Locking */ 587 spin_lock_bh(&ar->list_lock); 588 list_for_each_entry(vif, &ar->vif_list, list) { 589 if (vif->nw_type == ADHOC_NETWORK || 590 action != HTC_SEND_FULL_DROP) { 591 spin_unlock_bh(&ar->list_lock); 592 593 set_bit(NETQ_STOPPED, &vif->flags); 594 netif_stop_queue(vif->ndev); 595 596 return action; 597 } 598 } 599 spin_unlock_bh(&ar->list_lock); 600 601 return action; 602 } 603 604 /* TODO this needs to be looked at */ 605 static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif, 606 enum htc_endpoint_id eid, u32 map_no) 607 { 608 struct ath6kl *ar = vif->ar; 609 u32 i; 610 611 if (vif->nw_type != ADHOC_NETWORK) 612 return; 613 614 if (!ar->ibss_ps_enable) 615 return; 616 617 if (eid == ar->ctrl_ep) 618 return; 619 620 if (map_no == 0) 621 return; 622 623 map_no--; 624 ar->node_map[map_no].tx_pend--; 625 626 if (ar->node_map[map_no].tx_pend) 627 return; 628 629 if (map_no != (ar->node_num - 1)) 630 return; 631 632 for (i = ar->node_num; i > 0; i--) { 633 if (ar->node_map[i - 1].tx_pend) 634 break; 635 636 memset(&ar->node_map[i - 1], 0, 637 sizeof(struct ath6kl_node_mapping)); 638 ar->node_num--; 639 } 640 } 641 642 void ath6kl_tx_complete(void *context, struct list_head *packet_queue) 643 { 644 struct ath6kl *ar = context; 645 struct sk_buff_head skb_queue; 646 struct htc_packet *packet; 647 struct sk_buff *skb; 648 struct ath6kl_cookie *ath6kl_cookie; 649 u32 map_no = 0; 650 int status; 651 enum htc_endpoint_id eid; 652 bool wake_event = false; 653 bool flushing[ATH6KL_VIF_MAX] = {false}; 654 u8 if_idx; 655 struct ath6kl_vif *vif; 656 657 skb_queue_head_init(&skb_queue); 658 659 /* lock the driver as we update internal state */ 660 spin_lock_bh(&ar->lock); 661 662 /* reap completed packets */ 663 while (!list_empty(packet_queue)) { 664 665 packet = list_first_entry(packet_queue, struct htc_packet, 666 list); 667 list_del(&packet->list); 668 669 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt; 670 if (!ath6kl_cookie) 671 goto fatal; 672 673 status = packet->status; 674 skb = ath6kl_cookie->skb; 675 eid = packet->endpoint; 676 map_no = ath6kl_cookie->map_no; 677 678 if (!skb || !skb->data) 679 goto fatal; 680 681 __skb_queue_tail(&skb_queue, skb); 682 683 if (!status && (packet->act_len != skb->len)) 684 goto fatal; 685 686 ar->tx_pending[eid]--; 687 688 if (eid != ar->ctrl_ep) 689 ar->total_tx_data_pend--; 690 691 if (eid == ar->ctrl_ep) { 692 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag)) 693 clear_bit(WMI_CTRL_EP_FULL, &ar->flag); 694 695 if (ar->tx_pending[eid] == 0) 696 wake_event = true; 697 } 698 699 if (eid == ar->ctrl_ep) { 700 if_idx = wmi_cmd_hdr_get_if_idx( 701 (struct wmi_cmd_hdr *) packet->buf); 702 } else { 703 if_idx = wmi_data_hdr_get_if_idx( 704 (struct wmi_data_hdr *) packet->buf); 705 } 706 707 vif = ath6kl_get_vif_by_index(ar, if_idx); 708 if (!vif) { 709 ath6kl_free_cookie(ar, ath6kl_cookie); 710 continue; 711 } 712 713 if (status) { 714 if (status == -ECANCELED) 715 /* a packet was flushed */ 716 flushing[if_idx] = true; 717 718 vif->net_stats.tx_errors++; 719 720 if (status != -ENOSPC && status != -ECANCELED) 721 ath6kl_warn("tx complete error: %d\n", status); 722 723 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 724 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 725 __func__, skb, packet->buf, packet->act_len, 726 eid, "error!"); 727 } else { 728 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 729 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 730 __func__, skb, packet->buf, packet->act_len, 731 eid, "OK"); 732 733 flushing[if_idx] = false; 734 vif->net_stats.tx_packets++; 735 vif->net_stats.tx_bytes += skb->len; 736 } 737 738 ath6kl_tx_clear_node_map(vif, eid, map_no); 739 740 ath6kl_free_cookie(ar, ath6kl_cookie); 741 742 if (test_bit(NETQ_STOPPED, &vif->flags)) 743 clear_bit(NETQ_STOPPED, &vif->flags); 744 } 745 746 spin_unlock_bh(&ar->lock); 747 748 __skb_queue_purge(&skb_queue); 749 750 /* FIXME: Locking */ 751 spin_lock_bh(&ar->list_lock); 752 list_for_each_entry(vif, &ar->vif_list, list) { 753 if (test_bit(CONNECTED, &vif->flags) && 754 !flushing[vif->fw_vif_idx]) { 755 spin_unlock_bh(&ar->list_lock); 756 netif_wake_queue(vif->ndev); 757 spin_lock_bh(&ar->list_lock); 758 } 759 } 760 spin_unlock_bh(&ar->list_lock); 761 762 if (wake_event) 763 wake_up(&ar->event_wq); 764 765 return; 766 767 fatal: 768 WARN_ON(1); 769 spin_unlock_bh(&ar->lock); 770 return; 771 } 772 773 void ath6kl_tx_data_cleanup(struct ath6kl *ar) 774 { 775 int i; 776 777 /* flush all the data (non-control) streams */ 778 for (i = 0; i < WMM_NUM_AC; i++) 779 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i], 780 ATH6KL_DATA_PKT_TAG); 781 } 782 783 /* Rx functions */ 784 785 static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev, 786 struct sk_buff *skb) 787 { 788 if (!skb) 789 return; 790 791 skb->dev = dev; 792 793 if (!(skb->dev->flags & IFF_UP)) { 794 dev_kfree_skb(skb); 795 return; 796 } 797 798 skb->protocol = eth_type_trans(skb, skb->dev); 799 800 netif_rx_ni(skb); 801 } 802 803 static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num) 804 { 805 struct sk_buff *skb; 806 807 while (num) { 808 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 809 if (!skb) { 810 ath6kl_err("netbuf allocation failed\n"); 811 return; 812 } 813 skb_queue_tail(q, skb); 814 num--; 815 } 816 } 817 818 static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr) 819 { 820 struct sk_buff *skb = NULL; 821 822 if (skb_queue_len(&p_aggr->free_q) < (AGGR_NUM_OF_FREE_NETBUFS >> 2)) 823 ath6kl_alloc_netbufs(&p_aggr->free_q, AGGR_NUM_OF_FREE_NETBUFS); 824 825 skb = skb_dequeue(&p_aggr->free_q); 826 827 return skb; 828 } 829 830 void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint) 831 { 832 struct ath6kl *ar = target->dev->ar; 833 struct sk_buff *skb; 834 int rx_buf; 835 int n_buf_refill; 836 struct htc_packet *packet; 837 struct list_head queue; 838 839 n_buf_refill = ATH6KL_MAX_RX_BUFFERS - 840 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint); 841 842 if (n_buf_refill <= 0) 843 return; 844 845 INIT_LIST_HEAD(&queue); 846 847 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 848 "%s: providing htc with %d buffers at eid=%d\n", 849 __func__, n_buf_refill, endpoint); 850 851 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) { 852 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 853 if (!skb) 854 break; 855 856 packet = (struct htc_packet *) skb->head; 857 if (!IS_ALIGNED((unsigned long) skb->data, 4)) 858 skb->data = PTR_ALIGN(skb->data - 4, 4); 859 set_htc_rxpkt_info(packet, skb, skb->data, 860 ATH6KL_BUFFER_SIZE, endpoint); 861 list_add_tail(&packet->list, &queue); 862 } 863 864 if (!list_empty(&queue)) 865 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue); 866 } 867 868 void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count) 869 { 870 struct htc_packet *packet; 871 struct sk_buff *skb; 872 873 while (count) { 874 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE); 875 if (!skb) 876 return; 877 878 packet = (struct htc_packet *) skb->head; 879 if (!IS_ALIGNED((unsigned long) skb->data, 4)) 880 skb->data = PTR_ALIGN(skb->data - 4, 4); 881 set_htc_rxpkt_info(packet, skb, skb->data, 882 ATH6KL_AMSDU_BUFFER_SIZE, 0); 883 spin_lock_bh(&ar->lock); 884 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue); 885 spin_unlock_bh(&ar->lock); 886 count--; 887 } 888 } 889 890 /* 891 * Callback to allocate a receive buffer for a pending packet. We use a 892 * pre-allocated list of buffers of maximum AMSDU size (4K). 893 */ 894 struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target, 895 enum htc_endpoint_id endpoint, 896 int len) 897 { 898 struct ath6kl *ar = target->dev->ar; 899 struct htc_packet *packet = NULL; 900 struct list_head *pkt_pos; 901 int refill_cnt = 0, depth = 0; 902 903 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n", 904 __func__, endpoint, len); 905 906 if ((len <= ATH6KL_BUFFER_SIZE) || 907 (len > ATH6KL_AMSDU_BUFFER_SIZE)) 908 return NULL; 909 910 spin_lock_bh(&ar->lock); 911 912 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 913 spin_unlock_bh(&ar->lock); 914 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS; 915 goto refill_buf; 916 } 917 918 packet = list_first_entry(&ar->amsdu_rx_buffer_queue, 919 struct htc_packet, list); 920 list_del(&packet->list); 921 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue) 922 depth++; 923 924 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth; 925 spin_unlock_bh(&ar->lock); 926 927 /* set actual endpoint ID */ 928 packet->endpoint = endpoint; 929 930 refill_buf: 931 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD) 932 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt); 933 934 return packet; 935 } 936 937 static void aggr_slice_amsdu(struct aggr_info *p_aggr, 938 struct rxtid *rxtid, struct sk_buff *skb) 939 { 940 struct sk_buff *new_skb; 941 struct ethhdr *hdr; 942 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len; 943 u8 *framep; 944 945 mac_hdr_len = sizeof(struct ethhdr); 946 framep = skb->data + mac_hdr_len; 947 amsdu_len = skb->len - mac_hdr_len; 948 949 while (amsdu_len > mac_hdr_len) { 950 hdr = (struct ethhdr *) framep; 951 payload_8023_len = ntohs(hdr->h_proto); 952 953 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN || 954 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) { 955 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n", 956 payload_8023_len); 957 break; 958 } 959 960 frame_8023_len = payload_8023_len + mac_hdr_len; 961 new_skb = aggr_get_free_skb(p_aggr); 962 if (!new_skb) { 963 ath6kl_err("no buffer available\n"); 964 break; 965 } 966 967 memcpy(new_skb->data, framep, frame_8023_len); 968 skb_put(new_skb, frame_8023_len); 969 if (ath6kl_wmi_dot3_2_dix(new_skb)) { 970 ath6kl_err("dot3_2_dix error\n"); 971 dev_kfree_skb(new_skb); 972 break; 973 } 974 975 skb_queue_tail(&rxtid->q, new_skb); 976 977 /* Is this the last subframe within this aggregate ? */ 978 if ((amsdu_len - frame_8023_len) == 0) 979 break; 980 981 /* Add the length of A-MSDU subframe padding bytes - 982 * Round to nearest word. 983 */ 984 frame_8023_len = ALIGN(frame_8023_len, 4); 985 986 framep += frame_8023_len; 987 amsdu_len -= frame_8023_len; 988 } 989 990 dev_kfree_skb(skb); 991 } 992 993 static void aggr_deque_frms(struct aggr_info *p_aggr, u8 tid, 994 u16 seq_no, u8 order) 995 { 996 struct sk_buff *skb; 997 struct rxtid *rxtid; 998 struct skb_hold_q *node; 999 u16 idx, idx_end, seq_end; 1000 struct rxtid_stats *stats; 1001 1002 if (!p_aggr) 1003 return; 1004 1005 rxtid = &p_aggr->rx_tid[tid]; 1006 stats = &p_aggr->stat[tid]; 1007 1008 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1009 1010 /* 1011 * idx_end is typically the last possible frame in the window, 1012 * but changes to 'the' seq_no, when BAR comes. If seq_no 1013 * is non-zero, we will go up to that and stop. 1014 * Note: last seq no in current window will occupy the same 1015 * index position as index that is just previous to start. 1016 * An imp point : if win_sz is 7, for seq_no space of 4095, 1017 * then, there would be holes when sequence wrap around occurs. 1018 * Target should judiciously choose the win_sz, based on 1019 * this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz 1020 * 2, 4, 8, 16 win_sz works fine). 1021 * We must deque from "idx" to "idx_end", including both. 1022 */ 1023 seq_end = seq_no ? seq_no : rxtid->seq_next; 1024 idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz); 1025 1026 spin_lock_bh(&rxtid->lock); 1027 1028 do { 1029 node = &rxtid->hold_q[idx]; 1030 if ((order == 1) && (!node->skb)) 1031 break; 1032 1033 if (node->skb) { 1034 if (node->is_amsdu) 1035 aggr_slice_amsdu(p_aggr, rxtid, node->skb); 1036 else 1037 skb_queue_tail(&rxtid->q, node->skb); 1038 node->skb = NULL; 1039 } else 1040 stats->num_hole++; 1041 1042 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next); 1043 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1044 } while (idx != idx_end); 1045 1046 spin_unlock_bh(&rxtid->lock); 1047 1048 stats->num_delivered += skb_queue_len(&rxtid->q); 1049 1050 while ((skb = skb_dequeue(&rxtid->q))) 1051 ath6kl_deliver_frames_to_nw_stack(p_aggr->dev, skb); 1052 } 1053 1054 static bool aggr_process_recv_frm(struct aggr_info *agg_info, u8 tid, 1055 u16 seq_no, 1056 bool is_amsdu, struct sk_buff *frame) 1057 { 1058 struct rxtid *rxtid; 1059 struct rxtid_stats *stats; 1060 struct sk_buff *skb; 1061 struct skb_hold_q *node; 1062 u16 idx, st, cur, end; 1063 bool is_queued = false; 1064 u16 extended_end; 1065 1066 rxtid = &agg_info->rx_tid[tid]; 1067 stats = &agg_info->stat[tid]; 1068 1069 stats->num_into_aggr++; 1070 1071 if (!rxtid->aggr) { 1072 if (is_amsdu) { 1073 aggr_slice_amsdu(agg_info, rxtid, frame); 1074 is_queued = true; 1075 stats->num_amsdu++; 1076 while ((skb = skb_dequeue(&rxtid->q))) 1077 ath6kl_deliver_frames_to_nw_stack(agg_info->dev, 1078 skb); 1079 } 1080 return is_queued; 1081 } 1082 1083 /* Check the incoming sequence no, if it's in the window */ 1084 st = rxtid->seq_next; 1085 cur = seq_no; 1086 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO; 1087 1088 if (((st < end) && (cur < st || cur > end)) || 1089 ((st > end) && (cur > end) && (cur < st))) { 1090 extended_end = (end + rxtid->hold_q_sz - 1) & 1091 ATH6KL_MAX_SEQ_NO; 1092 1093 if (((end < extended_end) && 1094 (cur < end || cur > extended_end)) || 1095 ((end > extended_end) && (cur > extended_end) && 1096 (cur < end))) { 1097 aggr_deque_frms(agg_info, tid, 0, 0); 1098 if (cur >= rxtid->hold_q_sz - 1) 1099 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1); 1100 else 1101 rxtid->seq_next = ATH6KL_MAX_SEQ_NO - 1102 (rxtid->hold_q_sz - 2 - cur); 1103 } else { 1104 /* 1105 * Dequeue only those frames that are outside the 1106 * new shifted window. 1107 */ 1108 if (cur >= rxtid->hold_q_sz - 1) 1109 st = cur - (rxtid->hold_q_sz - 1); 1110 else 1111 st = ATH6KL_MAX_SEQ_NO - 1112 (rxtid->hold_q_sz - 2 - cur); 1113 1114 aggr_deque_frms(agg_info, tid, st, 0); 1115 } 1116 1117 stats->num_oow++; 1118 } 1119 1120 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz); 1121 1122 node = &rxtid->hold_q[idx]; 1123 1124 spin_lock_bh(&rxtid->lock); 1125 1126 /* 1127 * Is the cur frame duplicate or something beyond our window(hold_q 1128 * -> which is 2x, already)? 1129 * 1130 * 1. Duplicate is easy - drop incoming frame. 1131 * 2. Not falling in current sliding window. 1132 * 2a. is the frame_seq_no preceding current tid_seq_no? 1133 * -> drop the frame. perhaps sender did not get our ACK. 1134 * this is taken care of above. 1135 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ); 1136 * -> Taken care of it above, by moving window forward. 1137 */ 1138 dev_kfree_skb(node->skb); 1139 stats->num_dups++; 1140 1141 node->skb = frame; 1142 is_queued = true; 1143 node->is_amsdu = is_amsdu; 1144 node->seq_no = seq_no; 1145 1146 if (node->is_amsdu) 1147 stats->num_amsdu++; 1148 else 1149 stats->num_mpdu++; 1150 1151 spin_unlock_bh(&rxtid->lock); 1152 1153 aggr_deque_frms(agg_info, tid, 0, 1); 1154 1155 if (agg_info->timer_scheduled) 1156 rxtid->progress = true; 1157 else 1158 for (idx = 0 ; idx < rxtid->hold_q_sz; idx++) { 1159 if (rxtid->hold_q[idx].skb) { 1160 /* 1161 * There is a frame in the queue and no 1162 * timer so start a timer to ensure that 1163 * the frame doesn't remain stuck 1164 * forever. 1165 */ 1166 agg_info->timer_scheduled = true; 1167 mod_timer(&agg_info->timer, 1168 (jiffies + 1169 HZ * (AGGR_RX_TIMEOUT) / 1000)); 1170 rxtid->progress = false; 1171 rxtid->timer_mon = true; 1172 break; 1173 } 1174 } 1175 1176 return is_queued; 1177 } 1178 1179 static void ath6kl_uapsd_trigger_frame_rx(struct ath6kl_vif *vif, 1180 struct ath6kl_sta *conn) 1181 { 1182 struct ath6kl *ar = vif->ar; 1183 bool is_apsdq_empty, is_apsdq_empty_at_start; 1184 u32 num_frames_to_deliver, flags; 1185 struct sk_buff *skb = NULL; 1186 1187 /* 1188 * If the APSD q for this STA is not empty, dequeue and 1189 * send a pkt from the head of the q. Also update the 1190 * More data bit in the WMI_DATA_HDR if there are 1191 * more pkts for this STA in the APSD q. 1192 * If there are no more pkts for this STA, 1193 * update the APSD bitmap for this STA. 1194 */ 1195 1196 num_frames_to_deliver = (conn->apsd_info >> ATH6KL_APSD_NUM_OF_AC) & 1197 ATH6KL_APSD_FRAME_MASK; 1198 /* 1199 * Number of frames to send in a service period is 1200 * indicated by the station 1201 * in the QOS_INFO of the association request 1202 * If it is zero, send all frames 1203 */ 1204 if (!num_frames_to_deliver) 1205 num_frames_to_deliver = ATH6KL_APSD_ALL_FRAME; 1206 1207 spin_lock_bh(&conn->psq_lock); 1208 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1209 spin_unlock_bh(&conn->psq_lock); 1210 is_apsdq_empty_at_start = is_apsdq_empty; 1211 1212 while ((!is_apsdq_empty) && (num_frames_to_deliver)) { 1213 1214 spin_lock_bh(&conn->psq_lock); 1215 skb = skb_dequeue(&conn->apsdq); 1216 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1217 spin_unlock_bh(&conn->psq_lock); 1218 1219 /* 1220 * Set the STA flag to Trigger delivery, 1221 * so that the frame will go out 1222 */ 1223 conn->sta_flags |= STA_PS_APSD_TRIGGER; 1224 num_frames_to_deliver--; 1225 1226 /* Last frame in the service period, set EOSP or queue empty */ 1227 if ((is_apsdq_empty) || (!num_frames_to_deliver)) 1228 conn->sta_flags |= STA_PS_APSD_EOSP; 1229 1230 ath6kl_data_tx(skb, vif->ndev); 1231 conn->sta_flags &= ~(STA_PS_APSD_TRIGGER); 1232 conn->sta_flags &= ~(STA_PS_APSD_EOSP); 1233 } 1234 1235 if (is_apsdq_empty) { 1236 if (is_apsdq_empty_at_start) 1237 flags = WMI_AP_APSD_NO_DELIVERY_FRAMES; 1238 else 1239 flags = 0; 1240 1241 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 1242 vif->fw_vif_idx, 1243 conn->aid, 0, flags); 1244 } 1245 1246 return; 1247 } 1248 1249 void ath6kl_rx(struct htc_target *target, struct htc_packet *packet) 1250 { 1251 struct ath6kl *ar = target->dev->ar; 1252 struct sk_buff *skb = packet->pkt_cntxt; 1253 struct wmi_rx_meta_v2 *meta; 1254 struct wmi_data_hdr *dhdr; 1255 int min_hdr_len; 1256 u8 meta_type, dot11_hdr = 0; 1257 int status = packet->status; 1258 enum htc_endpoint_id ept = packet->endpoint; 1259 bool is_amsdu, prev_ps, ps_state = false; 1260 bool trig_state = false; 1261 struct ath6kl_sta *conn = NULL; 1262 struct sk_buff *skb1 = NULL; 1263 struct ethhdr *datap = NULL; 1264 struct ath6kl_vif *vif; 1265 u16 seq_no, offset; 1266 u8 tid, if_idx; 1267 1268 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 1269 "%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d", 1270 __func__, ar, ept, skb, packet->buf, 1271 packet->act_len, status); 1272 1273 if (status || !(skb->data + HTC_HDR_LENGTH)) { 1274 dev_kfree_skb(skb); 1275 return; 1276 } 1277 1278 skb_put(skb, packet->act_len + HTC_HDR_LENGTH); 1279 skb_pull(skb, HTC_HDR_LENGTH); 1280 1281 if (ept == ar->ctrl_ep) { 1282 if_idx = 1283 wmi_cmd_hdr_get_if_idx((struct wmi_cmd_hdr *) skb->data); 1284 } else { 1285 if_idx = 1286 wmi_data_hdr_get_if_idx((struct wmi_data_hdr *) skb->data); 1287 } 1288 1289 vif = ath6kl_get_vif_by_index(ar, if_idx); 1290 if (!vif) { 1291 dev_kfree_skb(skb); 1292 return; 1293 } 1294 1295 /* 1296 * Take lock to protect buffer counts and adaptive power throughput 1297 * state. 1298 */ 1299 spin_lock_bh(&vif->if_lock); 1300 1301 vif->net_stats.rx_packets++; 1302 vif->net_stats.rx_bytes += packet->act_len; 1303 1304 spin_unlock_bh(&vif->if_lock); 1305 1306 1307 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "rx ", 1308 skb->data, skb->len); 1309 1310 skb->dev = vif->ndev; 1311 1312 if (!test_bit(WMI_ENABLED, &ar->flag)) { 1313 if (EPPING_ALIGNMENT_PAD > 0) 1314 skb_pull(skb, EPPING_ALIGNMENT_PAD); 1315 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1316 return; 1317 } 1318 1319 ath6kl_check_wow_status(ar); 1320 1321 if (ept == ar->ctrl_ep) { 1322 ath6kl_wmi_control_rx(ar->wmi, skb); 1323 return; 1324 } 1325 1326 min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) + 1327 sizeof(struct ath6kl_llc_snap_hdr); 1328 1329 dhdr = (struct wmi_data_hdr *) skb->data; 1330 1331 /* 1332 * In the case of AP mode we may receive NULL data frames 1333 * that do not have LLC hdr. They are 16 bytes in size. 1334 * Allow these frames in the AP mode. 1335 */ 1336 if (vif->nw_type != AP_NETWORK && 1337 ((packet->act_len < min_hdr_len) || 1338 (packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) { 1339 ath6kl_info("frame len is too short or too long\n"); 1340 vif->net_stats.rx_errors++; 1341 vif->net_stats.rx_length_errors++; 1342 dev_kfree_skb(skb); 1343 return; 1344 } 1345 1346 /* Get the Power save state of the STA */ 1347 if (vif->nw_type == AP_NETWORK) { 1348 meta_type = wmi_data_hdr_get_meta(dhdr); 1349 1350 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) & 1351 WMI_DATA_HDR_PS_MASK); 1352 1353 offset = sizeof(struct wmi_data_hdr); 1354 trig_state = !!(le16_to_cpu(dhdr->info3) & WMI_DATA_HDR_TRIG); 1355 1356 switch (meta_type) { 1357 case 0: 1358 break; 1359 case WMI_META_VERSION_1: 1360 offset += sizeof(struct wmi_rx_meta_v1); 1361 break; 1362 case WMI_META_VERSION_2: 1363 offset += sizeof(struct wmi_rx_meta_v2); 1364 break; 1365 default: 1366 break; 1367 } 1368 1369 datap = (struct ethhdr *) (skb->data + offset); 1370 conn = ath6kl_find_sta(vif, datap->h_source); 1371 1372 if (!conn) { 1373 dev_kfree_skb(skb); 1374 return; 1375 } 1376 1377 /* 1378 * If there is a change in PS state of the STA, 1379 * take appropriate steps: 1380 * 1381 * 1. If Sleep-->Awake, flush the psq for the STA 1382 * Clear the PVB for the STA. 1383 * 2. If Awake-->Sleep, Starting queueing frames 1384 * the STA. 1385 */ 1386 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP); 1387 1388 if (ps_state) 1389 conn->sta_flags |= STA_PS_SLEEP; 1390 else 1391 conn->sta_flags &= ~STA_PS_SLEEP; 1392 1393 /* Accept trigger only when the station is in sleep */ 1394 if ((conn->sta_flags & STA_PS_SLEEP) && trig_state) 1395 ath6kl_uapsd_trigger_frame_rx(vif, conn); 1396 1397 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) { 1398 if (!(conn->sta_flags & STA_PS_SLEEP)) { 1399 struct sk_buff *skbuff = NULL; 1400 bool is_apsdq_empty; 1401 1402 spin_lock_bh(&conn->psq_lock); 1403 while ((skbuff = skb_dequeue(&conn->psq))) { 1404 spin_unlock_bh(&conn->psq_lock); 1405 ath6kl_data_tx(skbuff, vif->ndev); 1406 spin_lock_bh(&conn->psq_lock); 1407 } 1408 1409 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1410 while ((skbuff = skb_dequeue(&conn->apsdq))) { 1411 spin_unlock_bh(&conn->psq_lock); 1412 ath6kl_data_tx(skbuff, vif->ndev); 1413 spin_lock_bh(&conn->psq_lock); 1414 } 1415 spin_unlock_bh(&conn->psq_lock); 1416 1417 if (!is_apsdq_empty) 1418 ath6kl_wmi_set_apsd_bfrd_traf( 1419 ar->wmi, 1420 vif->fw_vif_idx, 1421 conn->aid, 0, 0); 1422 1423 /* Clear the PVB for this STA */ 1424 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, 1425 conn->aid, 0); 1426 } 1427 } 1428 1429 /* drop NULL data frames here */ 1430 if ((packet->act_len < min_hdr_len) || 1431 (packet->act_len > 1432 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) { 1433 dev_kfree_skb(skb); 1434 return; 1435 } 1436 } 1437 1438 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false; 1439 tid = wmi_data_hdr_get_up(dhdr); 1440 seq_no = wmi_data_hdr_get_seqno(dhdr); 1441 meta_type = wmi_data_hdr_get_meta(dhdr); 1442 dot11_hdr = wmi_data_hdr_get_dot11(dhdr); 1443 skb_pull(skb, sizeof(struct wmi_data_hdr)); 1444 1445 switch (meta_type) { 1446 case WMI_META_VERSION_1: 1447 skb_pull(skb, sizeof(struct wmi_rx_meta_v1)); 1448 break; 1449 case WMI_META_VERSION_2: 1450 meta = (struct wmi_rx_meta_v2 *) skb->data; 1451 if (meta->csum_flags & 0x1) { 1452 skb->ip_summed = CHECKSUM_COMPLETE; 1453 skb->csum = (__force __wsum) meta->csum; 1454 } 1455 skb_pull(skb, sizeof(struct wmi_rx_meta_v2)); 1456 break; 1457 default: 1458 break; 1459 } 1460 1461 if (dot11_hdr) 1462 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb); 1463 else if (!is_amsdu) 1464 status = ath6kl_wmi_dot3_2_dix(skb); 1465 1466 if (status) { 1467 /* 1468 * Drop frames that could not be processed (lack of 1469 * memory, etc.) 1470 */ 1471 dev_kfree_skb(skb); 1472 return; 1473 } 1474 1475 if (!(vif->ndev->flags & IFF_UP)) { 1476 dev_kfree_skb(skb); 1477 return; 1478 } 1479 1480 if (vif->nw_type == AP_NETWORK) { 1481 datap = (struct ethhdr *) skb->data; 1482 if (is_multicast_ether_addr(datap->h_dest)) 1483 /* 1484 * Bcast/Mcast frames should be sent to the 1485 * OS stack as well as on the air. 1486 */ 1487 skb1 = skb_copy(skb, GFP_ATOMIC); 1488 else { 1489 /* 1490 * Search for a connected STA with dstMac 1491 * as the Mac address. If found send the 1492 * frame to it on the air else send the 1493 * frame up the stack. 1494 */ 1495 conn = ath6kl_find_sta(vif, datap->h_dest); 1496 1497 if (conn && ar->intra_bss) { 1498 skb1 = skb; 1499 skb = NULL; 1500 } else if (conn && !ar->intra_bss) { 1501 dev_kfree_skb(skb); 1502 skb = NULL; 1503 } 1504 } 1505 if (skb1) 1506 ath6kl_data_tx(skb1, vif->ndev); 1507 1508 if (skb == NULL) { 1509 /* nothing to deliver up the stack */ 1510 return; 1511 } 1512 } 1513 1514 datap = (struct ethhdr *) skb->data; 1515 1516 if (is_unicast_ether_addr(datap->h_dest) && 1517 aggr_process_recv_frm(vif->aggr_cntxt, tid, seq_no, 1518 is_amsdu, skb)) 1519 /* aggregation code will handle the skb */ 1520 return; 1521 1522 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1523 } 1524 1525 static void aggr_timeout(unsigned long arg) 1526 { 1527 u8 i, j; 1528 struct aggr_info *p_aggr = (struct aggr_info *) arg; 1529 struct rxtid *rxtid; 1530 struct rxtid_stats *stats; 1531 1532 for (i = 0; i < NUM_OF_TIDS; i++) { 1533 rxtid = &p_aggr->rx_tid[i]; 1534 stats = &p_aggr->stat[i]; 1535 1536 if (!rxtid->aggr || !rxtid->timer_mon || rxtid->progress) 1537 continue; 1538 1539 stats->num_timeouts++; 1540 ath6kl_dbg(ATH6KL_DBG_AGGR, 1541 "aggr timeout (st %d end %d)\n", 1542 rxtid->seq_next, 1543 ((rxtid->seq_next + rxtid->hold_q_sz-1) & 1544 ATH6KL_MAX_SEQ_NO)); 1545 aggr_deque_frms(p_aggr, i, 0, 0); 1546 } 1547 1548 p_aggr->timer_scheduled = false; 1549 1550 for (i = 0; i < NUM_OF_TIDS; i++) { 1551 rxtid = &p_aggr->rx_tid[i]; 1552 1553 if (rxtid->aggr && rxtid->hold_q) { 1554 for (j = 0; j < rxtid->hold_q_sz; j++) { 1555 if (rxtid->hold_q[j].skb) { 1556 p_aggr->timer_scheduled = true; 1557 rxtid->timer_mon = true; 1558 rxtid->progress = false; 1559 break; 1560 } 1561 } 1562 1563 if (j >= rxtid->hold_q_sz) 1564 rxtid->timer_mon = false; 1565 } 1566 } 1567 1568 if (p_aggr->timer_scheduled) 1569 mod_timer(&p_aggr->timer, 1570 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT)); 1571 } 1572 1573 static void aggr_delete_tid_state(struct aggr_info *p_aggr, u8 tid) 1574 { 1575 struct rxtid *rxtid; 1576 struct rxtid_stats *stats; 1577 1578 if (!p_aggr || tid >= NUM_OF_TIDS) 1579 return; 1580 1581 rxtid = &p_aggr->rx_tid[tid]; 1582 stats = &p_aggr->stat[tid]; 1583 1584 if (rxtid->aggr) 1585 aggr_deque_frms(p_aggr, tid, 0, 0); 1586 1587 rxtid->aggr = false; 1588 rxtid->progress = false; 1589 rxtid->timer_mon = false; 1590 rxtid->win_sz = 0; 1591 rxtid->seq_next = 0; 1592 rxtid->hold_q_sz = 0; 1593 1594 kfree(rxtid->hold_q); 1595 rxtid->hold_q = NULL; 1596 1597 memset(stats, 0, sizeof(struct rxtid_stats)); 1598 } 1599 1600 void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid, u16 seq_no, 1601 u8 win_sz) 1602 { 1603 struct aggr_info *p_aggr = vif->aggr_cntxt; 1604 struct rxtid *rxtid; 1605 struct rxtid_stats *stats; 1606 u16 hold_q_size; 1607 1608 if (!p_aggr) 1609 return; 1610 1611 rxtid = &p_aggr->rx_tid[tid]; 1612 stats = &p_aggr->stat[tid]; 1613 1614 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX) 1615 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n", 1616 __func__, win_sz, tid); 1617 1618 if (rxtid->aggr) 1619 aggr_delete_tid_state(p_aggr, tid); 1620 1621 rxtid->seq_next = seq_no; 1622 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q); 1623 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL); 1624 if (!rxtid->hold_q) 1625 return; 1626 1627 rxtid->win_sz = win_sz; 1628 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz); 1629 if (!skb_queue_empty(&rxtid->q)) 1630 return; 1631 1632 rxtid->aggr = true; 1633 } 1634 1635 struct aggr_info *aggr_init(struct net_device *dev) 1636 { 1637 struct aggr_info *p_aggr = NULL; 1638 struct rxtid *rxtid; 1639 u8 i; 1640 1641 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL); 1642 if (!p_aggr) { 1643 ath6kl_err("failed to alloc memory for aggr_node\n"); 1644 return NULL; 1645 } 1646 1647 p_aggr->aggr_sz = AGGR_SZ_DEFAULT; 1648 p_aggr->dev = dev; 1649 init_timer(&p_aggr->timer); 1650 p_aggr->timer.function = aggr_timeout; 1651 p_aggr->timer.data = (unsigned long) p_aggr; 1652 1653 p_aggr->timer_scheduled = false; 1654 skb_queue_head_init(&p_aggr->free_q); 1655 1656 ath6kl_alloc_netbufs(&p_aggr->free_q, AGGR_NUM_OF_FREE_NETBUFS); 1657 1658 for (i = 0; i < NUM_OF_TIDS; i++) { 1659 rxtid = &p_aggr->rx_tid[i]; 1660 rxtid->aggr = false; 1661 rxtid->progress = false; 1662 rxtid->timer_mon = false; 1663 skb_queue_head_init(&rxtid->q); 1664 spin_lock_init(&rxtid->lock); 1665 } 1666 1667 return p_aggr; 1668 } 1669 1670 void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid) 1671 { 1672 struct aggr_info *p_aggr = vif->aggr_cntxt; 1673 struct rxtid *rxtid; 1674 1675 if (!p_aggr) 1676 return; 1677 1678 rxtid = &p_aggr->rx_tid[tid]; 1679 1680 if (rxtid->aggr) 1681 aggr_delete_tid_state(p_aggr, tid); 1682 } 1683 1684 void aggr_reset_state(struct aggr_info *aggr_info) 1685 { 1686 u8 tid; 1687 1688 for (tid = 0; tid < NUM_OF_TIDS; tid++) 1689 aggr_delete_tid_state(aggr_info, tid); 1690 } 1691 1692 /* clean up our amsdu buffer list */ 1693 void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar) 1694 { 1695 struct htc_packet *packet, *tmp_pkt; 1696 1697 spin_lock_bh(&ar->lock); 1698 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 1699 spin_unlock_bh(&ar->lock); 1700 return; 1701 } 1702 1703 list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue, 1704 list) { 1705 list_del(&packet->list); 1706 spin_unlock_bh(&ar->lock); 1707 dev_kfree_skb(packet->pkt_cntxt); 1708 spin_lock_bh(&ar->lock); 1709 } 1710 1711 spin_unlock_bh(&ar->lock); 1712 } 1713 1714 void aggr_module_destroy(struct aggr_info *aggr_info) 1715 { 1716 struct rxtid *rxtid; 1717 u8 i, k; 1718 1719 if (!aggr_info) 1720 return; 1721 1722 if (aggr_info->timer_scheduled) { 1723 del_timer(&aggr_info->timer); 1724 aggr_info->timer_scheduled = false; 1725 } 1726 1727 for (i = 0; i < NUM_OF_TIDS; i++) { 1728 rxtid = &aggr_info->rx_tid[i]; 1729 if (rxtid->hold_q) { 1730 for (k = 0; k < rxtid->hold_q_sz; k++) 1731 dev_kfree_skb(rxtid->hold_q[k].skb); 1732 kfree(rxtid->hold_q); 1733 } 1734 1735 skb_queue_purge(&rxtid->q); 1736 } 1737 1738 skb_queue_purge(&aggr_info->free_q); 1739 kfree(aggr_info); 1740 } 1741