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#include "core.h" 19#include "debug.h" 20 21/* 22 * tid - tid_mux0..tid_mux3 23 * aid - tid_mux4..tid_mux7 24 */ 25#define ATH6KL_TID_MASK 0xf 26#define ATH6KL_AID_SHIFT 4 27 28static inline u8 ath6kl_get_tid(u8 tid_mux) 29{ 30 return tid_mux & ATH6KL_TID_MASK; 31} 32 33static inline u8 ath6kl_get_aid(u8 tid_mux) 34{ 35 return tid_mux >> ATH6KL_AID_SHIFT; 36} 37 38static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev, 39 u32 *map_no) 40{ 41 struct ath6kl *ar = ath6kl_priv(dev); 42 struct ethhdr *eth_hdr; 43 u32 i, ep_map = -1; 44 u8 *datap; 45 46 *map_no = 0; 47 datap = skb->data; 48 eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr)); 49 50 if (is_multicast_ether_addr(eth_hdr->h_dest)) 51 return ENDPOINT_2; 52 53 for (i = 0; i < ar->node_num; i++) { 54 if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr, 55 ETH_ALEN) == 0) { 56 *map_no = i + 1; 57 ar->node_map[i].tx_pend++; 58 return ar->node_map[i].ep_id; 59 } 60 61 if ((ep_map == -1) && !ar->node_map[i].tx_pend) 62 ep_map = i; 63 } 64 65 if (ep_map == -1) { 66 ep_map = ar->node_num; 67 ar->node_num++; 68 if (ar->node_num > MAX_NODE_NUM) 69 return ENDPOINT_UNUSED; 70 } 71 72 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN); 73 74 for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) { 75 if (!ar->tx_pending[i]) { 76 ar->node_map[ep_map].ep_id = i; 77 break; 78 } 79 80 /* 81 * No free endpoint is available, start redistribution on 82 * the inuse endpoints. 83 */ 84 if (i == ENDPOINT_5) { 85 ar->node_map[ep_map].ep_id = ar->next_ep_id; 86 ar->next_ep_id++; 87 if (ar->next_ep_id > ENDPOINT_5) 88 ar->next_ep_id = ENDPOINT_2; 89 } 90 } 91 92 *map_no = ep_map + 1; 93 ar->node_map[ep_map].tx_pend++; 94 95 return ar->node_map[ep_map].ep_id; 96} 97 98static bool ath6kl_process_uapsdq(struct ath6kl_sta *conn, 99 struct ath6kl_vif *vif, 100 struct sk_buff *skb, 101 u32 *flags) 102{ 103 struct ath6kl *ar = vif->ar; 104 bool is_apsdq_empty = false; 105 struct ethhdr *datap = (struct ethhdr *) skb->data; 106 u8 up = 0, traffic_class, *ip_hdr; 107 u16 ether_type; 108 struct ath6kl_llc_snap_hdr *llc_hdr; 109 110 if (conn->sta_flags & STA_PS_APSD_TRIGGER) { 111 /* 112 * This tx is because of a uAPSD trigger, determine 113 * more and EOSP bit. Set EOSP if queue is empty 114 * or sufficient frames are delivered for this trigger. 115 */ 116 spin_lock_bh(&conn->psq_lock); 117 if (!skb_queue_empty(&conn->apsdq)) 118 *flags |= WMI_DATA_HDR_FLAGS_MORE; 119 else if (conn->sta_flags & STA_PS_APSD_EOSP) 120 *flags |= WMI_DATA_HDR_FLAGS_EOSP; 121 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 122 spin_unlock_bh(&conn->psq_lock); 123 return false; 124 } else if (!conn->apsd_info) 125 return false; 126 127 if (test_bit(WMM_ENABLED, &vif->flags)) { 128 ether_type = be16_to_cpu(datap->h_proto); 129 if (is_ethertype(ether_type)) { 130 /* packet is in DIX format */ 131 ip_hdr = (u8 *)(datap + 1); 132 } else { 133 /* packet is in 802.3 format */ 134 llc_hdr = (struct ath6kl_llc_snap_hdr *) 135 (datap + 1); 136 ether_type = be16_to_cpu(llc_hdr->eth_type); 137 ip_hdr = (u8 *)(llc_hdr + 1); 138 } 139 140 if (ether_type == IP_ETHERTYPE) 141 up = ath6kl_wmi_determine_user_priority( 142 ip_hdr, 0); 143 } 144 145 traffic_class = ath6kl_wmi_get_traffic_class(up); 146 147 if ((conn->apsd_info & (1 << traffic_class)) == 0) 148 return false; 149 150 /* Queue the frames if the STA is sleeping */ 151 spin_lock_bh(&conn->psq_lock); 152 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 153 skb_queue_tail(&conn->apsdq, skb); 154 spin_unlock_bh(&conn->psq_lock); 155 156 /* 157 * If this is the first pkt getting queued 158 * for this STA, update the PVB for this STA 159 */ 160 if (is_apsdq_empty) { 161 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 162 vif->fw_vif_idx, 163 conn->aid, 1, 0); 164 } 165 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 166 167 return true; 168} 169 170static bool ath6kl_process_psq(struct ath6kl_sta *conn, 171 struct ath6kl_vif *vif, 172 struct sk_buff *skb, 173 u32 *flags) 174{ 175 bool is_psq_empty = false; 176 struct ath6kl *ar = vif->ar; 177 178 if (conn->sta_flags & STA_PS_POLLED) { 179 spin_lock_bh(&conn->psq_lock); 180 if (!skb_queue_empty(&conn->psq)) 181 *flags |= WMI_DATA_HDR_FLAGS_MORE; 182 spin_unlock_bh(&conn->psq_lock); 183 return false; 184 } 185 186 /* Queue the frames if the STA is sleeping */ 187 spin_lock_bh(&conn->psq_lock); 188 is_psq_empty = skb_queue_empty(&conn->psq); 189 skb_queue_tail(&conn->psq, skb); 190 spin_unlock_bh(&conn->psq_lock); 191 192 /* 193 * If this is the first pkt getting queued 194 * for this STA, update the PVB for this 195 * STA. 196 */ 197 if (is_psq_empty) 198 ath6kl_wmi_set_pvb_cmd(ar->wmi, 199 vif->fw_vif_idx, 200 conn->aid, 1); 201 return true; 202} 203 204static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb, 205 u32 *flags) 206{ 207 struct ethhdr *datap = (struct ethhdr *) skb->data; 208 struct ath6kl_sta *conn = NULL; 209 bool ps_queued = false; 210 struct ath6kl *ar = vif->ar; 211 212 if (is_multicast_ether_addr(datap->h_dest)) { 213 u8 ctr = 0; 214 bool q_mcast = false; 215 216 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) { 217 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) { 218 q_mcast = true; 219 break; 220 } 221 } 222 223 if (q_mcast) { 224 /* 225 * If this transmit is not because of a Dtim Expiry 226 * q it. 227 */ 228 if (!test_bit(DTIM_EXPIRED, &vif->flags)) { 229 bool is_mcastq_empty = false; 230 231 spin_lock_bh(&ar->mcastpsq_lock); 232 is_mcastq_empty = 233 skb_queue_empty(&ar->mcastpsq); 234 skb_queue_tail(&ar->mcastpsq, skb); 235 spin_unlock_bh(&ar->mcastpsq_lock); 236 237 /* 238 * If this is the first Mcast pkt getting 239 * queued indicate to the target to set the 240 * BitmapControl LSB of the TIM IE. 241 */ 242 if (is_mcastq_empty) 243 ath6kl_wmi_set_pvb_cmd(ar->wmi, 244 vif->fw_vif_idx, 245 MCAST_AID, 1); 246 247 ps_queued = true; 248 } else { 249 /* 250 * This transmit is because of Dtim expiry. 251 * Determine if MoreData bit has to be set. 252 */ 253 spin_lock_bh(&ar->mcastpsq_lock); 254 if (!skb_queue_empty(&ar->mcastpsq)) 255 *flags |= WMI_DATA_HDR_FLAGS_MORE; 256 spin_unlock_bh(&ar->mcastpsq_lock); 257 } 258 } 259 } else { 260 conn = ath6kl_find_sta(vif, datap->h_dest); 261 if (!conn) { 262 dev_kfree_skb(skb); 263 264 /* Inform the caller that the skb is consumed */ 265 return true; 266 } 267 268 if (conn->sta_flags & STA_PS_SLEEP) { 269 ps_queued = ath6kl_process_uapsdq(conn, 270 vif, skb, flags); 271 if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD)) 272 ps_queued = ath6kl_process_psq(conn, 273 vif, skb, flags); 274 } 275 } 276 return ps_queued; 277} 278 279/* Tx functions */ 280 281int ath6kl_control_tx(void *devt, struct sk_buff *skb, 282 enum htc_endpoint_id eid) 283{ 284 struct ath6kl *ar = devt; 285 int status = 0; 286 struct ath6kl_cookie *cookie = NULL; 287 288 if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW)) 289 return -EACCES; 290 291 spin_lock_bh(&ar->lock); 292 293 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 294 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__, 295 skb, skb->len, eid); 296 297 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) { 298 /* 299 * Control endpoint is full, don't allocate resources, we 300 * are just going to drop this packet. 301 */ 302 cookie = NULL; 303 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n", 304 skb, skb->len); 305 } else 306 cookie = ath6kl_alloc_cookie(ar); 307 308 if (cookie == NULL) { 309 spin_unlock_bh(&ar->lock); 310 status = -ENOMEM; 311 goto fail_ctrl_tx; 312 } 313 314 ar->tx_pending[eid]++; 315 316 if (eid != ar->ctrl_ep) 317 ar->total_tx_data_pend++; 318 319 spin_unlock_bh(&ar->lock); 320 321 cookie->skb = skb; 322 cookie->map_no = 0; 323 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 324 eid, ATH6KL_CONTROL_PKT_TAG); 325 326 /* 327 * This interface is asynchronous, if there is an error, cleanup 328 * will happen in the TX completion callback. 329 */ 330 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 331 332 return 0; 333 334fail_ctrl_tx: 335 dev_kfree_skb(skb); 336 return status; 337} 338 339int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev) 340{ 341 struct ath6kl *ar = ath6kl_priv(dev); 342 struct ath6kl_cookie *cookie = NULL; 343 enum htc_endpoint_id eid = ENDPOINT_UNUSED; 344 struct ath6kl_vif *vif = netdev_priv(dev); 345 u32 map_no = 0; 346 u16 htc_tag = ATH6KL_DATA_PKT_TAG; 347 u8 ac = 99 ; /* initialize to unmapped ac */ 348 bool chk_adhoc_ps_mapping = false; 349 int ret; 350 struct wmi_tx_meta_v2 meta_v2; 351 void *meta; 352 u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed; 353 u8 meta_ver = 0; 354 u32 flags = 0; 355 356 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 357 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__, 358 skb, skb->data, skb->len); 359 360 /* If target is not associated */ 361 if (!test_bit(CONNECTED, &vif->flags)) { 362 dev_kfree_skb(skb); 363 return 0; 364 } 365 366 if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON)) { 367 dev_kfree_skb(skb); 368 return 0; 369 } 370 371 if (!test_bit(WMI_READY, &ar->flag)) 372 goto fail_tx; 373 374 /* AP mode Power saving processing */ 375 if (vif->nw_type == AP_NETWORK) { 376 if (ath6kl_powersave_ap(vif, skb, &flags)) 377 return 0; 378 } 379 380 if (test_bit(WMI_ENABLED, &ar->flag)) { 381 if ((dev->features & NETIF_F_IP_CSUM) && 382 (csum == CHECKSUM_PARTIAL)) { 383 csum_start = skb->csum_start - 384 (skb_network_header(skb) - skb->head) + 385 sizeof(struct ath6kl_llc_snap_hdr); 386 csum_dest = skb->csum_offset + csum_start; 387 } 388 389 if (skb_headroom(skb) < dev->needed_headroom) { 390 struct sk_buff *tmp_skb = skb; 391 392 skb = skb_realloc_headroom(skb, dev->needed_headroom); 393 kfree_skb(tmp_skb); 394 if (skb == NULL) { 395 vif->net_stats.tx_dropped++; 396 return 0; 397 } 398 } 399 400 if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) { 401 ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n"); 402 goto fail_tx; 403 } 404 405 if ((dev->features & NETIF_F_IP_CSUM) && 406 (csum == CHECKSUM_PARTIAL)) { 407 meta_v2.csum_start = csum_start; 408 meta_v2.csum_dest = csum_dest; 409 410 /* instruct target to calculate checksum */ 411 meta_v2.csum_flags = WMI_META_V2_FLAG_CSUM_OFFLOAD; 412 meta_ver = WMI_META_VERSION_2; 413 meta = &meta_v2; 414 } else { 415 meta_ver = 0; 416 meta = NULL; 417 } 418 419 ret = ath6kl_wmi_data_hdr_add(ar->wmi, skb, 420 DATA_MSGTYPE, flags, 0, 421 meta_ver, 422 meta, vif->fw_vif_idx); 423 424 if (ret) { 425 ath6kl_warn("failed to add wmi data header:%d\n" 426 , ret); 427 goto fail_tx; 428 } 429 430 if ((vif->nw_type == ADHOC_NETWORK) && 431 ar->ibss_ps_enable && test_bit(CONNECTED, &vif->flags)) 432 chk_adhoc_ps_mapping = true; 433 else { 434 /* get the stream mapping */ 435 ret = ath6kl_wmi_implicit_create_pstream(ar->wmi, 436 vif->fw_vif_idx, skb, 437 0, test_bit(WMM_ENABLED, &vif->flags), &ac); 438 if (ret) 439 goto fail_tx; 440 } 441 } else 442 goto fail_tx; 443 444 spin_lock_bh(&ar->lock); 445 446 if (chk_adhoc_ps_mapping) 447 eid = ath6kl_ibss_map_epid(skb, dev, &map_no); 448 else 449 eid = ar->ac2ep_map[ac]; 450 451 if (eid == 0 || eid == ENDPOINT_UNUSED) { 452 ath6kl_err("eid %d is not mapped!\n", eid); 453 spin_unlock_bh(&ar->lock); 454 goto fail_tx; 455 } 456 457 /* allocate resource for this packet */ 458 cookie = ath6kl_alloc_cookie(ar); 459 460 if (!cookie) { 461 spin_unlock_bh(&ar->lock); 462 goto fail_tx; 463 } 464 465 /* update counts while the lock is held */ 466 ar->tx_pending[eid]++; 467 ar->total_tx_data_pend++; 468 469 spin_unlock_bh(&ar->lock); 470 471 if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) && 472 skb_cloned(skb)) { 473 /* 474 * We will touch (move the buffer data to align it. Since the 475 * skb buffer is cloned and not only the header is changed, we 476 * have to copy it to allow the changes. Since we are copying 477 * the data here, we may as well align it by reserving suitable 478 * headroom to avoid the memmove in ath6kl_htc_tx_buf_align(). 479 */ 480 struct sk_buff *nskb; 481 482 nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC); 483 if (nskb == NULL) 484 goto fail_tx; 485 kfree_skb(skb); 486 skb = nskb; 487 } 488 489 cookie->skb = skb; 490 cookie->map_no = map_no; 491 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 492 eid, htc_tag); 493 494 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ", 495 skb->data, skb->len); 496 497 /* 498 * HTC interface is asynchronous, if this fails, cleanup will 499 * happen in the ath6kl_tx_complete callback. 500 */ 501 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 502 503 return 0; 504 505fail_tx: 506 dev_kfree_skb(skb); 507 508 vif->net_stats.tx_dropped++; 509 vif->net_stats.tx_aborted_errors++; 510 511 return 0; 512} 513 514/* indicate tx activity or inactivity on a WMI stream */ 515void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active) 516{ 517 struct ath6kl *ar = devt; 518 enum htc_endpoint_id eid; 519 int i; 520 521 eid = ar->ac2ep_map[traffic_class]; 522 523 if (!test_bit(WMI_ENABLED, &ar->flag)) 524 goto notify_htc; 525 526 spin_lock_bh(&ar->lock); 527 528 ar->ac_stream_active[traffic_class] = active; 529 530 if (active) { 531 /* 532 * Keep track of the active stream with the highest 533 * priority. 534 */ 535 if (ar->ac_stream_pri_map[traffic_class] > 536 ar->hiac_stream_active_pri) 537 /* set the new highest active priority */ 538 ar->hiac_stream_active_pri = 539 ar->ac_stream_pri_map[traffic_class]; 540 541 } else { 542 /* 543 * We may have to search for the next active stream 544 * that is the highest priority. 545 */ 546 if (ar->hiac_stream_active_pri == 547 ar->ac_stream_pri_map[traffic_class]) { 548 /* 549 * The highest priority stream just went inactive 550 * reset and search for the "next" highest "active" 551 * priority stream. 552 */ 553 ar->hiac_stream_active_pri = 0; 554 555 for (i = 0; i < WMM_NUM_AC; i++) { 556 if (ar->ac_stream_active[i] && 557 (ar->ac_stream_pri_map[i] > 558 ar->hiac_stream_active_pri)) 559 /* 560 * Set the new highest active 561 * priority. 562 */ 563 ar->hiac_stream_active_pri = 564 ar->ac_stream_pri_map[i]; 565 } 566 } 567 } 568 569 spin_unlock_bh(&ar->lock); 570 571notify_htc: 572 /* notify HTC, this may cause credit distribution changes */ 573 ath6kl_htc_indicate_activity_change(ar->htc_target, eid, active); 574} 575 576enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target, 577 struct htc_packet *packet) 578{ 579 struct ath6kl *ar = target->dev->ar; 580 struct ath6kl_vif *vif; 581 enum htc_endpoint_id endpoint = packet->endpoint; 582 enum htc_send_full_action action = HTC_SEND_FULL_KEEP; 583 584 if (endpoint == ar->ctrl_ep) { 585 /* 586 * Under normal WMI if this is getting full, then something 587 * is running rampant the host should not be exhausting the 588 * WMI queue with too many commands the only exception to 589 * this is during testing using endpointping. 590 */ 591 set_bit(WMI_CTRL_EP_FULL, &ar->flag); 592 ath6kl_err("wmi ctrl ep is full\n"); 593 return action; 594 } 595 596 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG) 597 return action; 598 599 /* 600 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for 601 * the highest active stream. 602 */ 603 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] < 604 ar->hiac_stream_active_pri && 605 ar->cookie_count <= 606 target->endpoint[endpoint].tx_drop_packet_threshold) 607 /* 608 * Give preference to the highest priority stream by 609 * dropping the packets which overflowed. 610 */ 611 action = HTC_SEND_FULL_DROP; 612 613 /* FIXME: Locking */ 614 spin_lock_bh(&ar->list_lock); 615 list_for_each_entry(vif, &ar->vif_list, list) { 616 if (vif->nw_type == ADHOC_NETWORK || 617 action != HTC_SEND_FULL_DROP) { 618 spin_unlock_bh(&ar->list_lock); 619 620 set_bit(NETQ_STOPPED, &vif->flags); 621 netif_stop_queue(vif->ndev); 622 623 return action; 624 } 625 } 626 spin_unlock_bh(&ar->list_lock); 627 628 return action; 629} 630 631/* TODO this needs to be looked at */ 632static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif, 633 enum htc_endpoint_id eid, u32 map_no) 634{ 635 struct ath6kl *ar = vif->ar; 636 u32 i; 637 638 if (vif->nw_type != ADHOC_NETWORK) 639 return; 640 641 if (!ar->ibss_ps_enable) 642 return; 643 644 if (eid == ar->ctrl_ep) 645 return; 646 647 if (map_no == 0) 648 return; 649 650 map_no--; 651 ar->node_map[map_no].tx_pend--; 652 653 if (ar->node_map[map_no].tx_pend) 654 return; 655 656 if (map_no != (ar->node_num - 1)) 657 return; 658 659 for (i = ar->node_num; i > 0; i--) { 660 if (ar->node_map[i - 1].tx_pend) 661 break; 662 663 memset(&ar->node_map[i - 1], 0, 664 sizeof(struct ath6kl_node_mapping)); 665 ar->node_num--; 666 } 667} 668 669void ath6kl_tx_complete(void *context, struct list_head *packet_queue) 670{ 671 struct ath6kl *ar = context; 672 struct sk_buff_head skb_queue; 673 struct htc_packet *packet; 674 struct sk_buff *skb; 675 struct ath6kl_cookie *ath6kl_cookie; 676 u32 map_no = 0; 677 int status; 678 enum htc_endpoint_id eid; 679 bool wake_event = false; 680 bool flushing[ATH6KL_VIF_MAX] = {false}; 681 u8 if_idx; 682 struct ath6kl_vif *vif; 683 684 skb_queue_head_init(&skb_queue); 685 686 /* lock the driver as we update internal state */ 687 spin_lock_bh(&ar->lock); 688 689 /* reap completed packets */ 690 while (!list_empty(packet_queue)) { 691 692 packet = list_first_entry(packet_queue, struct htc_packet, 693 list); 694 list_del(&packet->list); 695 696 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt; 697 if (!ath6kl_cookie) 698 goto fatal; 699 700 status = packet->status; 701 skb = ath6kl_cookie->skb; 702 eid = packet->endpoint; 703 map_no = ath6kl_cookie->map_no; 704 705 if (!skb || !skb->data) 706 goto fatal; 707 708 __skb_queue_tail(&skb_queue, skb); 709 710 if (!status && (packet->act_len != skb->len)) 711 goto fatal; 712 713 ar->tx_pending[eid]--; 714 715 if (eid != ar->ctrl_ep) 716 ar->total_tx_data_pend--; 717 718 if (eid == ar->ctrl_ep) { 719 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag)) 720 clear_bit(WMI_CTRL_EP_FULL, &ar->flag); 721 722 if (ar->tx_pending[eid] == 0) 723 wake_event = true; 724 } 725 726 if (eid == ar->ctrl_ep) { 727 if_idx = wmi_cmd_hdr_get_if_idx( 728 (struct wmi_cmd_hdr *) packet->buf); 729 } else { 730 if_idx = wmi_data_hdr_get_if_idx( 731 (struct wmi_data_hdr *) packet->buf); 732 } 733 734 vif = ath6kl_get_vif_by_index(ar, if_idx); 735 if (!vif) { 736 ath6kl_free_cookie(ar, ath6kl_cookie); 737 continue; 738 } 739 740 if (status) { 741 if (status == -ECANCELED) 742 /* a packet was flushed */ 743 flushing[if_idx] = true; 744 745 vif->net_stats.tx_errors++; 746 747 if (status != -ENOSPC && status != -ECANCELED) 748 ath6kl_warn("tx complete error: %d\n", status); 749 750 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 751 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 752 __func__, skb, packet->buf, packet->act_len, 753 eid, "error!"); 754 } else { 755 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 756 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 757 __func__, skb, packet->buf, packet->act_len, 758 eid, "OK"); 759 760 flushing[if_idx] = false; 761 vif->net_stats.tx_packets++; 762 vif->net_stats.tx_bytes += skb->len; 763 } 764 765 ath6kl_tx_clear_node_map(vif, eid, map_no); 766 767 ath6kl_free_cookie(ar, ath6kl_cookie); 768 769 if (test_bit(NETQ_STOPPED, &vif->flags)) 770 clear_bit(NETQ_STOPPED, &vif->flags); 771 } 772 773 spin_unlock_bh(&ar->lock); 774 775 __skb_queue_purge(&skb_queue); 776 777 /* FIXME: Locking */ 778 spin_lock_bh(&ar->list_lock); 779 list_for_each_entry(vif, &ar->vif_list, list) { 780 if (test_bit(CONNECTED, &vif->flags) && 781 !flushing[vif->fw_vif_idx]) { 782 spin_unlock_bh(&ar->list_lock); 783 netif_wake_queue(vif->ndev); 784 spin_lock_bh(&ar->list_lock); 785 } 786 } 787 spin_unlock_bh(&ar->list_lock); 788 789 if (wake_event) 790 wake_up(&ar->event_wq); 791 792 return; 793 794fatal: 795 WARN_ON(1); 796 spin_unlock_bh(&ar->lock); 797 return; 798} 799 800void ath6kl_tx_data_cleanup(struct ath6kl *ar) 801{ 802 int i; 803 804 /* flush all the data (non-control) streams */ 805 for (i = 0; i < WMM_NUM_AC; i++) 806 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i], 807 ATH6KL_DATA_PKT_TAG); 808} 809 810/* Rx functions */ 811 812static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev, 813 struct sk_buff *skb) 814{ 815 if (!skb) 816 return; 817 818 skb->dev = dev; 819 820 if (!(skb->dev->flags & IFF_UP)) { 821 dev_kfree_skb(skb); 822 return; 823 } 824 825 skb->protocol = eth_type_trans(skb, skb->dev); 826 827 netif_rx_ni(skb); 828} 829 830static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num) 831{ 832 struct sk_buff *skb; 833 834 while (num) { 835 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 836 if (!skb) { 837 ath6kl_err("netbuf allocation failed\n"); 838 return; 839 } 840 skb_queue_tail(q, skb); 841 num--; 842 } 843} 844 845static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr) 846{ 847 struct sk_buff *skb = NULL; 848 849 if (skb_queue_len(&p_aggr->rx_amsdu_freeq) < 850 (AGGR_NUM_OF_FREE_NETBUFS >> 2)) 851 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, 852 AGGR_NUM_OF_FREE_NETBUFS); 853 854 skb = skb_dequeue(&p_aggr->rx_amsdu_freeq); 855 856 return skb; 857} 858 859void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint) 860{ 861 struct ath6kl *ar = target->dev->ar; 862 struct sk_buff *skb; 863 int rx_buf; 864 int n_buf_refill; 865 struct htc_packet *packet; 866 struct list_head queue; 867 868 n_buf_refill = ATH6KL_MAX_RX_BUFFERS - 869 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint); 870 871 if (n_buf_refill <= 0) 872 return; 873 874 INIT_LIST_HEAD(&queue); 875 876 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 877 "%s: providing htc with %d buffers at eid=%d\n", 878 __func__, n_buf_refill, endpoint); 879 880 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) { 881 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 882 if (!skb) 883 break; 884 885 packet = (struct htc_packet *) skb->head; 886 if (!IS_ALIGNED((unsigned long) skb->data, 4)) 887 skb->data = PTR_ALIGN(skb->data - 4, 4); 888 set_htc_rxpkt_info(packet, skb, skb->data, 889 ATH6KL_BUFFER_SIZE, endpoint); 890 list_add_tail(&packet->list, &queue); 891 } 892 893 if (!list_empty(&queue)) 894 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue); 895} 896 897void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count) 898{ 899 struct htc_packet *packet; 900 struct sk_buff *skb; 901 902 while (count) { 903 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE); 904 if (!skb) 905 return; 906 907 packet = (struct htc_packet *) skb->head; 908 if (!IS_ALIGNED((unsigned long) skb->data, 4)) 909 skb->data = PTR_ALIGN(skb->data - 4, 4); 910 set_htc_rxpkt_info(packet, skb, skb->data, 911 ATH6KL_AMSDU_BUFFER_SIZE, 0); 912 spin_lock_bh(&ar->lock); 913 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue); 914 spin_unlock_bh(&ar->lock); 915 count--; 916 } 917} 918 919/* 920 * Callback to allocate a receive buffer for a pending packet. We use a 921 * pre-allocated list of buffers of maximum AMSDU size (4K). 922 */ 923struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target, 924 enum htc_endpoint_id endpoint, 925 int len) 926{ 927 struct ath6kl *ar = target->dev->ar; 928 struct htc_packet *packet = NULL; 929 struct list_head *pkt_pos; 930 int refill_cnt = 0, depth = 0; 931 932 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n", 933 __func__, endpoint, len); 934 935 if ((len <= ATH6KL_BUFFER_SIZE) || 936 (len > ATH6KL_AMSDU_BUFFER_SIZE)) 937 return NULL; 938 939 spin_lock_bh(&ar->lock); 940 941 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 942 spin_unlock_bh(&ar->lock); 943 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS; 944 goto refill_buf; 945 } 946 947 packet = list_first_entry(&ar->amsdu_rx_buffer_queue, 948 struct htc_packet, list); 949 list_del(&packet->list); 950 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue) 951 depth++; 952 953 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth; 954 spin_unlock_bh(&ar->lock); 955 956 /* set actual endpoint ID */ 957 packet->endpoint = endpoint; 958 959refill_buf: 960 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD) 961 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt); 962 963 return packet; 964} 965 966static void aggr_slice_amsdu(struct aggr_info *p_aggr, 967 struct rxtid *rxtid, struct sk_buff *skb) 968{ 969 struct sk_buff *new_skb; 970 struct ethhdr *hdr; 971 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len; 972 u8 *framep; 973 974 mac_hdr_len = sizeof(struct ethhdr); 975 framep = skb->data + mac_hdr_len; 976 amsdu_len = skb->len - mac_hdr_len; 977 978 while (amsdu_len > mac_hdr_len) { 979 hdr = (struct ethhdr *) framep; 980 payload_8023_len = ntohs(hdr->h_proto); 981 982 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN || 983 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) { 984 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n", 985 payload_8023_len); 986 break; 987 } 988 989 frame_8023_len = payload_8023_len + mac_hdr_len; 990 new_skb = aggr_get_free_skb(p_aggr); 991 if (!new_skb) { 992 ath6kl_err("no buffer available\n"); 993 break; 994 } 995 996 memcpy(new_skb->data, framep, frame_8023_len); 997 skb_put(new_skb, frame_8023_len); 998 if (ath6kl_wmi_dot3_2_dix(new_skb)) { 999 ath6kl_err("dot3_2_dix error\n"); 1000 dev_kfree_skb(new_skb); 1001 break; 1002 } 1003 1004 skb_queue_tail(&rxtid->q, new_skb); 1005 1006 /* Is this the last subframe within this aggregate ? */ 1007 if ((amsdu_len - frame_8023_len) == 0) 1008 break; 1009 1010 /* Add the length of A-MSDU subframe padding bytes - 1011 * Round to nearest word. 1012 */ 1013 frame_8023_len = ALIGN(frame_8023_len, 4); 1014 1015 framep += frame_8023_len; 1016 amsdu_len -= frame_8023_len; 1017 } 1018 1019 dev_kfree_skb(skb); 1020} 1021 1022static void aggr_deque_frms(struct aggr_info_conn *agg_conn, u8 tid, 1023 u16 seq_no, u8 order) 1024{ 1025 struct sk_buff *skb; 1026 struct rxtid *rxtid; 1027 struct skb_hold_q *node; 1028 u16 idx, idx_end, seq_end; 1029 struct rxtid_stats *stats; 1030 1031 rxtid = &agg_conn->rx_tid[tid]; 1032 stats = &agg_conn->stat[tid]; 1033 1034 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1035 1036 /* 1037 * idx_end is typically the last possible frame in the window, 1038 * but changes to 'the' seq_no, when BAR comes. If seq_no 1039 * is non-zero, we will go up to that and stop. 1040 * Note: last seq no in current window will occupy the same 1041 * index position as index that is just previous to start. 1042 * An imp point : if win_sz is 7, for seq_no space of 4095, 1043 * then, there would be holes when sequence wrap around occurs. 1044 * Target should judiciously choose the win_sz, based on 1045 * this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz 1046 * 2, 4, 8, 16 win_sz works fine). 1047 * We must deque from "idx" to "idx_end", including both. 1048 */ 1049 seq_end = seq_no ? seq_no : rxtid->seq_next; 1050 idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz); 1051 1052 spin_lock_bh(&rxtid->lock); 1053 1054 do { 1055 node = &rxtid->hold_q[idx]; 1056 if ((order == 1) && (!node->skb)) 1057 break; 1058 1059 if (node->skb) { 1060 if (node->is_amsdu) 1061 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, 1062 node->skb); 1063 else 1064 skb_queue_tail(&rxtid->q, node->skb); 1065 node->skb = NULL; 1066 } else 1067 stats->num_hole++; 1068 1069 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next); 1070 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1071 } while (idx != idx_end); 1072 1073 spin_unlock_bh(&rxtid->lock); 1074 1075 stats->num_delivered += skb_queue_len(&rxtid->q); 1076 1077 while ((skb = skb_dequeue(&rxtid->q))) 1078 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, skb); 1079} 1080 1081static bool aggr_process_recv_frm(struct aggr_info_conn *agg_conn, u8 tid, 1082 u16 seq_no, 1083 bool is_amsdu, struct sk_buff *frame) 1084{ 1085 struct rxtid *rxtid; 1086 struct rxtid_stats *stats; 1087 struct sk_buff *skb; 1088 struct skb_hold_q *node; 1089 u16 idx, st, cur, end; 1090 bool is_queued = false; 1091 u16 extended_end; 1092 1093 rxtid = &agg_conn->rx_tid[tid]; 1094 stats = &agg_conn->stat[tid]; 1095 1096 stats->num_into_aggr++; 1097 1098 if (!rxtid->aggr) { 1099 if (is_amsdu) { 1100 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, frame); 1101 is_queued = true; 1102 stats->num_amsdu++; 1103 while ((skb = skb_dequeue(&rxtid->q))) 1104 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, 1105 skb); 1106 } 1107 return is_queued; 1108 } 1109 1110 /* Check the incoming sequence no, if it's in the window */ 1111 st = rxtid->seq_next; 1112 cur = seq_no; 1113 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO; 1114 1115 if (((st < end) && (cur < st || cur > end)) || 1116 ((st > end) && (cur > end) && (cur < st))) { 1117 extended_end = (end + rxtid->hold_q_sz - 1) & 1118 ATH6KL_MAX_SEQ_NO; 1119 1120 if (((end < extended_end) && 1121 (cur < end || cur > extended_end)) || 1122 ((end > extended_end) && (cur > extended_end) && 1123 (cur < end))) { 1124 aggr_deque_frms(agg_conn, tid, 0, 0); 1125 if (cur >= rxtid->hold_q_sz - 1) 1126 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1); 1127 else 1128 rxtid->seq_next = ATH6KL_MAX_SEQ_NO - 1129 (rxtid->hold_q_sz - 2 - cur); 1130 } else { 1131 /* 1132 * Dequeue only those frames that are outside the 1133 * new shifted window. 1134 */ 1135 if (cur >= rxtid->hold_q_sz - 1) 1136 st = cur - (rxtid->hold_q_sz - 1); 1137 else 1138 st = ATH6KL_MAX_SEQ_NO - 1139 (rxtid->hold_q_sz - 2 - cur); 1140 1141 aggr_deque_frms(agg_conn, tid, st, 0); 1142 } 1143 1144 stats->num_oow++; 1145 } 1146 1147 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz); 1148 1149 node = &rxtid->hold_q[idx]; 1150 1151 spin_lock_bh(&rxtid->lock); 1152 1153 /* 1154 * Is the cur frame duplicate or something beyond our window(hold_q 1155 * -> which is 2x, already)? 1156 * 1157 * 1. Duplicate is easy - drop incoming frame. 1158 * 2. Not falling in current sliding window. 1159 * 2a. is the frame_seq_no preceding current tid_seq_no? 1160 * -> drop the frame. perhaps sender did not get our ACK. 1161 * this is taken care of above. 1162 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ); 1163 * -> Taken care of it above, by moving window forward. 1164 */ 1165 dev_kfree_skb(node->skb); 1166 stats->num_dups++; 1167 1168 node->skb = frame; 1169 is_queued = true; 1170 node->is_amsdu = is_amsdu; 1171 node->seq_no = seq_no; 1172 1173 if (node->is_amsdu) 1174 stats->num_amsdu++; 1175 else 1176 stats->num_mpdu++; 1177 1178 spin_unlock_bh(&rxtid->lock); 1179 1180 aggr_deque_frms(agg_conn, tid, 0, 1); 1181 1182 if (agg_conn->timer_scheduled) 1183 rxtid->progress = true; 1184 else 1185 for (idx = 0 ; idx < rxtid->hold_q_sz; idx++) { 1186 if (rxtid->hold_q[idx].skb) { 1187 /* 1188 * There is a frame in the queue and no 1189 * timer so start a timer to ensure that 1190 * the frame doesn't remain stuck 1191 * forever. 1192 */ 1193 agg_conn->timer_scheduled = true; 1194 mod_timer(&agg_conn->timer, 1195 (jiffies + 1196 HZ * (AGGR_RX_TIMEOUT) / 1000)); 1197 rxtid->progress = false; 1198 rxtid->timer_mon = true; 1199 break; 1200 } 1201 } 1202 1203 return is_queued; 1204} 1205 1206static void ath6kl_uapsd_trigger_frame_rx(struct ath6kl_vif *vif, 1207 struct ath6kl_sta *conn) 1208{ 1209 struct ath6kl *ar = vif->ar; 1210 bool is_apsdq_empty, is_apsdq_empty_at_start; 1211 u32 num_frames_to_deliver, flags; 1212 struct sk_buff *skb = NULL; 1213 1214 /* 1215 * If the APSD q for this STA is not empty, dequeue and 1216 * send a pkt from the head of the q. Also update the 1217 * More data bit in the WMI_DATA_HDR if there are 1218 * more pkts for this STA in the APSD q. 1219 * If there are no more pkts for this STA, 1220 * update the APSD bitmap for this STA. 1221 */ 1222 1223 num_frames_to_deliver = (conn->apsd_info >> ATH6KL_APSD_NUM_OF_AC) & 1224 ATH6KL_APSD_FRAME_MASK; 1225 /* 1226 * Number of frames to send in a service period is 1227 * indicated by the station 1228 * in the QOS_INFO of the association request 1229 * If it is zero, send all frames 1230 */ 1231 if (!num_frames_to_deliver) 1232 num_frames_to_deliver = ATH6KL_APSD_ALL_FRAME; 1233 1234 spin_lock_bh(&conn->psq_lock); 1235 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1236 spin_unlock_bh(&conn->psq_lock); 1237 is_apsdq_empty_at_start = is_apsdq_empty; 1238 1239 while ((!is_apsdq_empty) && (num_frames_to_deliver)) { 1240 1241 spin_lock_bh(&conn->psq_lock); 1242 skb = skb_dequeue(&conn->apsdq); 1243 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1244 spin_unlock_bh(&conn->psq_lock); 1245 1246 /* 1247 * Set the STA flag to Trigger delivery, 1248 * so that the frame will go out 1249 */ 1250 conn->sta_flags |= STA_PS_APSD_TRIGGER; 1251 num_frames_to_deliver--; 1252 1253 /* Last frame in the service period, set EOSP or queue empty */ 1254 if ((is_apsdq_empty) || (!num_frames_to_deliver)) 1255 conn->sta_flags |= STA_PS_APSD_EOSP; 1256 1257 ath6kl_data_tx(skb, vif->ndev); 1258 conn->sta_flags &= ~(STA_PS_APSD_TRIGGER); 1259 conn->sta_flags &= ~(STA_PS_APSD_EOSP); 1260 } 1261 1262 if (is_apsdq_empty) { 1263 if (is_apsdq_empty_at_start) 1264 flags = WMI_AP_APSD_NO_DELIVERY_FRAMES; 1265 else 1266 flags = 0; 1267 1268 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 1269 vif->fw_vif_idx, 1270 conn->aid, 0, flags); 1271 } 1272 1273 return; 1274} 1275 1276void ath6kl_rx(struct htc_target *target, struct htc_packet *packet) 1277{ 1278 struct ath6kl *ar = target->dev->ar; 1279 struct sk_buff *skb = packet->pkt_cntxt; 1280 struct wmi_rx_meta_v2 *meta; 1281 struct wmi_data_hdr *dhdr; 1282 int min_hdr_len; 1283 u8 meta_type, dot11_hdr = 0; 1284 int status = packet->status; 1285 enum htc_endpoint_id ept = packet->endpoint; 1286 bool is_amsdu, prev_ps, ps_state = false; 1287 bool trig_state = false; 1288 struct ath6kl_sta *conn = NULL; 1289 struct sk_buff *skb1 = NULL; 1290 struct ethhdr *datap = NULL; 1291 struct ath6kl_vif *vif; 1292 struct aggr_info_conn *aggr_conn; 1293 u16 seq_no, offset; 1294 u8 tid, if_idx; 1295 1296 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 1297 "%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d", 1298 __func__, ar, ept, skb, packet->buf, 1299 packet->act_len, status); 1300 1301 if (status || !(skb->data + HTC_HDR_LENGTH)) { 1302 dev_kfree_skb(skb); 1303 return; 1304 } 1305 1306 skb_put(skb, packet->act_len + HTC_HDR_LENGTH); 1307 skb_pull(skb, HTC_HDR_LENGTH); 1308 1309 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "rx ", 1310 skb->data, skb->len); 1311 1312 if (ept == ar->ctrl_ep) { 1313 if (test_bit(WMI_ENABLED, &ar->flag)) { 1314 ath6kl_check_wow_status(ar); 1315 ath6kl_wmi_control_rx(ar->wmi, skb); 1316 return; 1317 } 1318 if_idx = 1319 wmi_cmd_hdr_get_if_idx((struct wmi_cmd_hdr *) skb->data); 1320 } else { 1321 if_idx = 1322 wmi_data_hdr_get_if_idx((struct wmi_data_hdr *) skb->data); 1323 } 1324 1325 vif = ath6kl_get_vif_by_index(ar, if_idx); 1326 if (!vif) { 1327 dev_kfree_skb(skb); 1328 return; 1329 } 1330 1331 /* 1332 * Take lock to protect buffer counts and adaptive power throughput 1333 * state. 1334 */ 1335 spin_lock_bh(&vif->if_lock); 1336 1337 vif->net_stats.rx_packets++; 1338 vif->net_stats.rx_bytes += packet->act_len; 1339 1340 spin_unlock_bh(&vif->if_lock); 1341 1342 skb->dev = vif->ndev; 1343 1344 if (!test_bit(WMI_ENABLED, &ar->flag)) { 1345 if (EPPING_ALIGNMENT_PAD > 0) 1346 skb_pull(skb, EPPING_ALIGNMENT_PAD); 1347 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1348 return; 1349 } 1350 1351 ath6kl_check_wow_status(ar); 1352 1353 min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) + 1354 sizeof(struct ath6kl_llc_snap_hdr); 1355 1356 dhdr = (struct wmi_data_hdr *) skb->data; 1357 1358 /* 1359 * In the case of AP mode we may receive NULL data frames 1360 * that do not have LLC hdr. They are 16 bytes in size. 1361 * Allow these frames in the AP mode. 1362 */ 1363 if (vif->nw_type != AP_NETWORK && 1364 ((packet->act_len < min_hdr_len) || 1365 (packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) { 1366 ath6kl_info("frame len is too short or too long\n"); 1367 vif->net_stats.rx_errors++; 1368 vif->net_stats.rx_length_errors++; 1369 dev_kfree_skb(skb); 1370 return; 1371 } 1372 1373 /* Get the Power save state of the STA */ 1374 if (vif->nw_type == AP_NETWORK) { 1375 meta_type = wmi_data_hdr_get_meta(dhdr); 1376 1377 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) & 1378 WMI_DATA_HDR_PS_MASK); 1379 1380 offset = sizeof(struct wmi_data_hdr); 1381 trig_state = !!(le16_to_cpu(dhdr->info3) & WMI_DATA_HDR_TRIG); 1382 1383 switch (meta_type) { 1384 case 0: 1385 break; 1386 case WMI_META_VERSION_1: 1387 offset += sizeof(struct wmi_rx_meta_v1); 1388 break; 1389 case WMI_META_VERSION_2: 1390 offset += sizeof(struct wmi_rx_meta_v2); 1391 break; 1392 default: 1393 break; 1394 } 1395 1396 datap = (struct ethhdr *) (skb->data + offset); 1397 conn = ath6kl_find_sta(vif, datap->h_source); 1398 1399 if (!conn) { 1400 dev_kfree_skb(skb); 1401 return; 1402 } 1403 1404 /* 1405 * If there is a change in PS state of the STA, 1406 * take appropriate steps: 1407 * 1408 * 1. If Sleep-->Awake, flush the psq for the STA 1409 * Clear the PVB for the STA. 1410 * 2. If Awake-->Sleep, Starting queueing frames 1411 * the STA. 1412 */ 1413 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP); 1414 1415 if (ps_state) 1416 conn->sta_flags |= STA_PS_SLEEP; 1417 else 1418 conn->sta_flags &= ~STA_PS_SLEEP; 1419 1420 /* Accept trigger only when the station is in sleep */ 1421 if ((conn->sta_flags & STA_PS_SLEEP) && trig_state) 1422 ath6kl_uapsd_trigger_frame_rx(vif, conn); 1423 1424 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) { 1425 if (!(conn->sta_flags & STA_PS_SLEEP)) { 1426 struct sk_buff *skbuff = NULL; 1427 bool is_apsdq_empty; 1428 struct ath6kl_mgmt_buff *mgmt; 1429 u8 idx; 1430 1431 spin_lock_bh(&conn->psq_lock); 1432 while (conn->mgmt_psq_len > 0) { 1433 mgmt = list_first_entry( 1434 &conn->mgmt_psq, 1435 struct ath6kl_mgmt_buff, 1436 list); 1437 list_del(&mgmt->list); 1438 conn->mgmt_psq_len--; 1439 spin_unlock_bh(&conn->psq_lock); 1440 idx = vif->fw_vif_idx; 1441 1442 ath6kl_wmi_send_mgmt_cmd(ar->wmi, 1443 idx, 1444 mgmt->id, 1445 mgmt->freq, 1446 mgmt->wait, 1447 mgmt->buf, 1448 mgmt->len, 1449 mgmt->no_cck); 1450 1451 kfree(mgmt); 1452 spin_lock_bh(&conn->psq_lock); 1453 } 1454 conn->mgmt_psq_len = 0; 1455 while ((skbuff = skb_dequeue(&conn->psq))) { 1456 spin_unlock_bh(&conn->psq_lock); 1457 ath6kl_data_tx(skbuff, vif->ndev); 1458 spin_lock_bh(&conn->psq_lock); 1459 } 1460 1461 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1462 while ((skbuff = skb_dequeue(&conn->apsdq))) { 1463 spin_unlock_bh(&conn->psq_lock); 1464 ath6kl_data_tx(skbuff, vif->ndev); 1465 spin_lock_bh(&conn->psq_lock); 1466 } 1467 spin_unlock_bh(&conn->psq_lock); 1468 1469 if (!is_apsdq_empty) 1470 ath6kl_wmi_set_apsd_bfrd_traf( 1471 ar->wmi, 1472 vif->fw_vif_idx, 1473 conn->aid, 0, 0); 1474 1475 /* Clear the PVB for this STA */ 1476 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, 1477 conn->aid, 0); 1478 } 1479 } 1480 1481 /* drop NULL data frames here */ 1482 if ((packet->act_len < min_hdr_len) || 1483 (packet->act_len > 1484 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) { 1485 dev_kfree_skb(skb); 1486 return; 1487 } 1488 } 1489 1490 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false; 1491 tid = wmi_data_hdr_get_up(dhdr); 1492 seq_no = wmi_data_hdr_get_seqno(dhdr); 1493 meta_type = wmi_data_hdr_get_meta(dhdr); 1494 dot11_hdr = wmi_data_hdr_get_dot11(dhdr); 1495 skb_pull(skb, sizeof(struct wmi_data_hdr)); 1496 1497 switch (meta_type) { 1498 case WMI_META_VERSION_1: 1499 skb_pull(skb, sizeof(struct wmi_rx_meta_v1)); 1500 break; 1501 case WMI_META_VERSION_2: 1502 meta = (struct wmi_rx_meta_v2 *) skb->data; 1503 if (meta->csum_flags & 0x1) { 1504 skb->ip_summed = CHECKSUM_COMPLETE; 1505 skb->csum = (__force __wsum) meta->csum; 1506 } 1507 skb_pull(skb, sizeof(struct wmi_rx_meta_v2)); 1508 break; 1509 default: 1510 break; 1511 } 1512 1513 if (dot11_hdr) 1514 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb); 1515 else if (!is_amsdu) 1516 status = ath6kl_wmi_dot3_2_dix(skb); 1517 1518 if (status) { 1519 /* 1520 * Drop frames that could not be processed (lack of 1521 * memory, etc.) 1522 */ 1523 dev_kfree_skb(skb); 1524 return; 1525 } 1526 1527 if (!(vif->ndev->flags & IFF_UP)) { 1528 dev_kfree_skb(skb); 1529 return; 1530 } 1531 1532 if (vif->nw_type == AP_NETWORK) { 1533 datap = (struct ethhdr *) skb->data; 1534 if (is_multicast_ether_addr(datap->h_dest)) 1535 /* 1536 * Bcast/Mcast frames should be sent to the 1537 * OS stack as well as on the air. 1538 */ 1539 skb1 = skb_copy(skb, GFP_ATOMIC); 1540 else { 1541 /* 1542 * Search for a connected STA with dstMac 1543 * as the Mac address. If found send the 1544 * frame to it on the air else send the 1545 * frame up the stack. 1546 */ 1547 conn = ath6kl_find_sta(vif, datap->h_dest); 1548 1549 if (conn && ar->intra_bss) { 1550 skb1 = skb; 1551 skb = NULL; 1552 } else if (conn && !ar->intra_bss) { 1553 dev_kfree_skb(skb); 1554 skb = NULL; 1555 } 1556 } 1557 if (skb1) 1558 ath6kl_data_tx(skb1, vif->ndev); 1559 1560 if (skb == NULL) { 1561 /* nothing to deliver up the stack */ 1562 return; 1563 } 1564 } 1565 1566 datap = (struct ethhdr *) skb->data; 1567 1568 if (is_unicast_ether_addr(datap->h_dest)) { 1569 if (vif->nw_type == AP_NETWORK) { 1570 conn = ath6kl_find_sta(vif, datap->h_source); 1571 if (!conn) 1572 return; 1573 aggr_conn = conn->aggr_conn; 1574 } else 1575 aggr_conn = vif->aggr_cntxt->aggr_conn; 1576 1577 if (aggr_process_recv_frm(aggr_conn, tid, seq_no, 1578 is_amsdu, skb)) { 1579 /* aggregation code will handle the skb */ 1580 return; 1581 } 1582 } 1583 1584 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1585} 1586 1587static void aggr_timeout(unsigned long arg) 1588{ 1589 u8 i, j; 1590 struct aggr_info_conn *aggr_conn = (struct aggr_info_conn *) arg; 1591 struct rxtid *rxtid; 1592 struct rxtid_stats *stats; 1593 1594 for (i = 0; i < NUM_OF_TIDS; i++) { 1595 rxtid = &aggr_conn->rx_tid[i]; 1596 stats = &aggr_conn->stat[i]; 1597 1598 if (!rxtid->aggr || !rxtid->timer_mon || rxtid->progress) 1599 continue; 1600 1601 stats->num_timeouts++; 1602 ath6kl_dbg(ATH6KL_DBG_AGGR, 1603 "aggr timeout (st %d end %d)\n", 1604 rxtid->seq_next, 1605 ((rxtid->seq_next + rxtid->hold_q_sz-1) & 1606 ATH6KL_MAX_SEQ_NO)); 1607 aggr_deque_frms(aggr_conn, i, 0, 0); 1608 } 1609 1610 aggr_conn->timer_scheduled = false; 1611 1612 for (i = 0; i < NUM_OF_TIDS; i++) { 1613 rxtid = &aggr_conn->rx_tid[i]; 1614 1615 if (rxtid->aggr && rxtid->hold_q) { 1616 for (j = 0; j < rxtid->hold_q_sz; j++) { 1617 if (rxtid->hold_q[j].skb) { 1618 aggr_conn->timer_scheduled = true; 1619 rxtid->timer_mon = true; 1620 rxtid->progress = false; 1621 break; 1622 } 1623 } 1624 1625 if (j >= rxtid->hold_q_sz) 1626 rxtid->timer_mon = false; 1627 } 1628 } 1629 1630 if (aggr_conn->timer_scheduled) 1631 mod_timer(&aggr_conn->timer, 1632 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT)); 1633} 1634 1635static void aggr_delete_tid_state(struct aggr_info_conn *aggr_conn, u8 tid) 1636{ 1637 struct rxtid *rxtid; 1638 struct rxtid_stats *stats; 1639 1640 if (!aggr_conn || tid >= NUM_OF_TIDS) 1641 return; 1642 1643 rxtid = &aggr_conn->rx_tid[tid]; 1644 stats = &aggr_conn->stat[tid]; 1645 1646 if (rxtid->aggr) 1647 aggr_deque_frms(aggr_conn, tid, 0, 0); 1648 1649 rxtid->aggr = false; 1650 rxtid->progress = false; 1651 rxtid->timer_mon = false; 1652 rxtid->win_sz = 0; 1653 rxtid->seq_next = 0; 1654 rxtid->hold_q_sz = 0; 1655 1656 kfree(rxtid->hold_q); 1657 rxtid->hold_q = NULL; 1658 1659 memset(stats, 0, sizeof(struct rxtid_stats)); 1660} 1661 1662void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid_mux, u16 seq_no, 1663 u8 win_sz) 1664{ 1665 struct ath6kl_sta *sta; 1666 struct aggr_info_conn *aggr_conn = NULL; 1667 struct rxtid *rxtid; 1668 struct rxtid_stats *stats; 1669 u16 hold_q_size; 1670 u8 tid, aid; 1671 1672 if (vif->nw_type == AP_NETWORK) { 1673 aid = ath6kl_get_aid(tid_mux); 1674 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1675 if (sta) 1676 aggr_conn = sta->aggr_conn; 1677 } else 1678 aggr_conn = vif->aggr_cntxt->aggr_conn; 1679 1680 if (!aggr_conn) 1681 return; 1682 1683 tid = ath6kl_get_tid(tid_mux); 1684 if (tid >= NUM_OF_TIDS) 1685 return; 1686 1687 rxtid = &aggr_conn->rx_tid[tid]; 1688 stats = &aggr_conn->stat[tid]; 1689 1690 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX) 1691 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n", 1692 __func__, win_sz, tid); 1693 1694 if (rxtid->aggr) 1695 aggr_delete_tid_state(aggr_conn, tid); 1696 1697 rxtid->seq_next = seq_no; 1698 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q); 1699 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL); 1700 if (!rxtid->hold_q) 1701 return; 1702 1703 rxtid->win_sz = win_sz; 1704 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz); 1705 if (!skb_queue_empty(&rxtid->q)) 1706 return; 1707 1708 rxtid->aggr = true; 1709} 1710 1711void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info, 1712 struct aggr_info_conn *aggr_conn) 1713{ 1714 struct rxtid *rxtid; 1715 u8 i; 1716 1717 aggr_conn->aggr_sz = AGGR_SZ_DEFAULT; 1718 aggr_conn->dev = vif->ndev; 1719 init_timer(&aggr_conn->timer); 1720 aggr_conn->timer.function = aggr_timeout; 1721 aggr_conn->timer.data = (unsigned long) aggr_conn; 1722 aggr_conn->aggr_info = aggr_info; 1723 1724 aggr_conn->timer_scheduled = false; 1725 1726 for (i = 0; i < NUM_OF_TIDS; i++) { 1727 rxtid = &aggr_conn->rx_tid[i]; 1728 rxtid->aggr = false; 1729 rxtid->progress = false; 1730 rxtid->timer_mon = false; 1731 skb_queue_head_init(&rxtid->q); 1732 spin_lock_init(&rxtid->lock); 1733 } 1734 1735} 1736 1737struct aggr_info *aggr_init(struct ath6kl_vif *vif) 1738{ 1739 struct aggr_info *p_aggr = NULL; 1740 1741 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL); 1742 if (!p_aggr) { 1743 ath6kl_err("failed to alloc memory for aggr_node\n"); 1744 return NULL; 1745 } 1746 1747 p_aggr->aggr_conn = kzalloc(sizeof(struct aggr_info_conn), GFP_KERNEL); 1748 if (!p_aggr->aggr_conn) { 1749 ath6kl_err("failed to alloc memory for connection specific aggr info\n"); 1750 kfree(p_aggr); 1751 return NULL; 1752 } 1753 1754 aggr_conn_init(vif, p_aggr, p_aggr->aggr_conn); 1755 1756 skb_queue_head_init(&p_aggr->rx_amsdu_freeq); 1757 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, AGGR_NUM_OF_FREE_NETBUFS); 1758 1759 return p_aggr; 1760} 1761 1762void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid_mux) 1763{ 1764 struct ath6kl_sta *sta; 1765 struct rxtid *rxtid; 1766 struct aggr_info_conn *aggr_conn = NULL; 1767 u8 tid, aid; 1768 1769 if (vif->nw_type == AP_NETWORK) { 1770 aid = ath6kl_get_aid(tid_mux); 1771 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1772 if (sta) 1773 aggr_conn = sta->aggr_conn; 1774 } else 1775 aggr_conn = vif->aggr_cntxt->aggr_conn; 1776 1777 if (!aggr_conn) 1778 return; 1779 1780 tid = ath6kl_get_tid(tid_mux); 1781 if (tid >= NUM_OF_TIDS) 1782 return; 1783 1784 rxtid = &aggr_conn->rx_tid[tid]; 1785 1786 if (rxtid->aggr) 1787 aggr_delete_tid_state(aggr_conn, tid); 1788} 1789 1790void aggr_reset_state(struct aggr_info_conn *aggr_conn) 1791{ 1792 u8 tid; 1793 1794 if (!aggr_conn) 1795 return; 1796 1797 if (aggr_conn->timer_scheduled) { 1798 del_timer(&aggr_conn->timer); 1799 aggr_conn->timer_scheduled = false; 1800 } 1801 1802 for (tid = 0; tid < NUM_OF_TIDS; tid++) 1803 aggr_delete_tid_state(aggr_conn, tid); 1804} 1805 1806/* clean up our amsdu buffer list */ 1807void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar) 1808{ 1809 struct htc_packet *packet, *tmp_pkt; 1810 1811 spin_lock_bh(&ar->lock); 1812 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 1813 spin_unlock_bh(&ar->lock); 1814 return; 1815 } 1816 1817 list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue, 1818 list) { 1819 list_del(&packet->list); 1820 spin_unlock_bh(&ar->lock); 1821 dev_kfree_skb(packet->pkt_cntxt); 1822 spin_lock_bh(&ar->lock); 1823 } 1824 1825 spin_unlock_bh(&ar->lock); 1826} 1827 1828void aggr_module_destroy(struct aggr_info *aggr_info) 1829{ 1830 if (!aggr_info) 1831 return; 1832 1833 aggr_reset_state(aggr_info->aggr_conn); 1834 skb_queue_purge(&aggr_info->rx_amsdu_freeq); 1835 kfree(aggr_info->aggr_conn); 1836 kfree(aggr_info); 1837} 1838