1 /* 2 * Copyright (c) 2004-2011 Atheros Communications Inc. 3 * Copyright (c) 2011-2012 Qualcomm Atheros, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 19 20 #include "core.h" 21 #include "debug.h" 22 #include "htc-ops.h" 23 24 /* 25 * tid - tid_mux0..tid_mux3 26 * aid - tid_mux4..tid_mux7 27 */ 28 #define ATH6KL_TID_MASK 0xf 29 #define ATH6KL_AID_SHIFT 4 30 31 static inline u8 ath6kl_get_tid(u8 tid_mux) 32 { 33 return tid_mux & ATH6KL_TID_MASK; 34 } 35 36 static inline u8 ath6kl_get_aid(u8 tid_mux) 37 { 38 return tid_mux >> ATH6KL_AID_SHIFT; 39 } 40 41 static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev, 42 u32 *map_no) 43 { 44 struct ath6kl *ar = ath6kl_priv(dev); 45 struct ethhdr *eth_hdr; 46 u32 i, ep_map = -1; 47 u8 *datap; 48 49 *map_no = 0; 50 datap = skb->data; 51 eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr)); 52 53 if (is_multicast_ether_addr(eth_hdr->h_dest)) 54 return ENDPOINT_2; 55 56 for (i = 0; i < ar->node_num; i++) { 57 if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr, 58 ETH_ALEN) == 0) { 59 *map_no = i + 1; 60 ar->node_map[i].tx_pend++; 61 return ar->node_map[i].ep_id; 62 } 63 64 if ((ep_map == -1) && !ar->node_map[i].tx_pend) 65 ep_map = i; 66 } 67 68 if (ep_map == -1) { 69 ep_map = ar->node_num; 70 ar->node_num++; 71 if (ar->node_num > MAX_NODE_NUM) 72 return ENDPOINT_UNUSED; 73 } 74 75 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN); 76 77 for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) { 78 if (!ar->tx_pending[i]) { 79 ar->node_map[ep_map].ep_id = i; 80 break; 81 } 82 83 /* 84 * No free endpoint is available, start redistribution on 85 * the inuse endpoints. 86 */ 87 if (i == ENDPOINT_5) { 88 ar->node_map[ep_map].ep_id = ar->next_ep_id; 89 ar->next_ep_id++; 90 if (ar->next_ep_id > ENDPOINT_5) 91 ar->next_ep_id = ENDPOINT_2; 92 } 93 } 94 95 *map_no = ep_map + 1; 96 ar->node_map[ep_map].tx_pend++; 97 98 return ar->node_map[ep_map].ep_id; 99 } 100 101 static bool ath6kl_process_uapsdq(struct ath6kl_sta *conn, 102 struct ath6kl_vif *vif, 103 struct sk_buff *skb, 104 u32 *flags) 105 { 106 struct ath6kl *ar = vif->ar; 107 bool is_apsdq_empty = false; 108 struct ethhdr *datap = (struct ethhdr *) skb->data; 109 u8 up = 0, traffic_class, *ip_hdr; 110 u16 ether_type; 111 struct ath6kl_llc_snap_hdr *llc_hdr; 112 113 if (conn->sta_flags & STA_PS_APSD_TRIGGER) { 114 /* 115 * This tx is because of a uAPSD trigger, determine 116 * more and EOSP bit. Set EOSP if queue is empty 117 * or sufficient frames are delivered for this trigger. 118 */ 119 spin_lock_bh(&conn->psq_lock); 120 if (!skb_queue_empty(&conn->apsdq)) 121 *flags |= WMI_DATA_HDR_FLAGS_MORE; 122 else if (conn->sta_flags & STA_PS_APSD_EOSP) 123 *flags |= WMI_DATA_HDR_FLAGS_EOSP; 124 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 125 spin_unlock_bh(&conn->psq_lock); 126 return false; 127 } else if (!conn->apsd_info) 128 return false; 129 130 if (test_bit(WMM_ENABLED, &vif->flags)) { 131 ether_type = be16_to_cpu(datap->h_proto); 132 if (is_ethertype(ether_type)) { 133 /* packet is in DIX format */ 134 ip_hdr = (u8 *)(datap + 1); 135 } else { 136 /* packet is in 802.3 format */ 137 llc_hdr = (struct ath6kl_llc_snap_hdr *) 138 (datap + 1); 139 ether_type = be16_to_cpu(llc_hdr->eth_type); 140 ip_hdr = (u8 *)(llc_hdr + 1); 141 } 142 143 if (ether_type == IP_ETHERTYPE) 144 up = ath6kl_wmi_determine_user_priority( 145 ip_hdr, 0); 146 } 147 148 traffic_class = ath6kl_wmi_get_traffic_class(up); 149 150 if ((conn->apsd_info & (1 << traffic_class)) == 0) 151 return false; 152 153 /* Queue the frames if the STA is sleeping */ 154 spin_lock_bh(&conn->psq_lock); 155 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 156 skb_queue_tail(&conn->apsdq, skb); 157 spin_unlock_bh(&conn->psq_lock); 158 159 /* 160 * If this is the first pkt getting queued 161 * for this STA, update the PVB for this STA 162 */ 163 if (is_apsdq_empty) { 164 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 165 vif->fw_vif_idx, 166 conn->aid, 1, 0); 167 } 168 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 169 170 return true; 171 } 172 173 static bool ath6kl_process_psq(struct ath6kl_sta *conn, 174 struct ath6kl_vif *vif, 175 struct sk_buff *skb, 176 u32 *flags) 177 { 178 bool is_psq_empty = false; 179 struct ath6kl *ar = vif->ar; 180 181 if (conn->sta_flags & STA_PS_POLLED) { 182 spin_lock_bh(&conn->psq_lock); 183 if (!skb_queue_empty(&conn->psq)) 184 *flags |= WMI_DATA_HDR_FLAGS_MORE; 185 spin_unlock_bh(&conn->psq_lock); 186 return false; 187 } 188 189 /* Queue the frames if the STA is sleeping */ 190 spin_lock_bh(&conn->psq_lock); 191 is_psq_empty = skb_queue_empty(&conn->psq); 192 skb_queue_tail(&conn->psq, skb); 193 spin_unlock_bh(&conn->psq_lock); 194 195 /* 196 * If this is the first pkt getting queued 197 * for this STA, update the PVB for this 198 * STA. 199 */ 200 if (is_psq_empty) 201 ath6kl_wmi_set_pvb_cmd(ar->wmi, 202 vif->fw_vif_idx, 203 conn->aid, 1); 204 return true; 205 } 206 207 static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb, 208 u32 *flags) 209 { 210 struct ethhdr *datap = (struct ethhdr *) skb->data; 211 struct ath6kl_sta *conn = NULL; 212 bool ps_queued = false; 213 struct ath6kl *ar = vif->ar; 214 215 if (is_multicast_ether_addr(datap->h_dest)) { 216 u8 ctr = 0; 217 bool q_mcast = false; 218 219 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) { 220 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) { 221 q_mcast = true; 222 break; 223 } 224 } 225 226 if (q_mcast) { 227 /* 228 * If this transmit is not because of a Dtim Expiry 229 * q it. 230 */ 231 if (!test_bit(DTIM_EXPIRED, &vif->flags)) { 232 bool is_mcastq_empty = false; 233 234 spin_lock_bh(&ar->mcastpsq_lock); 235 is_mcastq_empty = 236 skb_queue_empty(&ar->mcastpsq); 237 skb_queue_tail(&ar->mcastpsq, skb); 238 spin_unlock_bh(&ar->mcastpsq_lock); 239 240 /* 241 * If this is the first Mcast pkt getting 242 * queued indicate to the target to set the 243 * BitmapControl LSB of the TIM IE. 244 */ 245 if (is_mcastq_empty) 246 ath6kl_wmi_set_pvb_cmd(ar->wmi, 247 vif->fw_vif_idx, 248 MCAST_AID, 1); 249 250 ps_queued = true; 251 } else { 252 /* 253 * This transmit is because of Dtim expiry. 254 * Determine if MoreData bit has to be set. 255 */ 256 spin_lock_bh(&ar->mcastpsq_lock); 257 if (!skb_queue_empty(&ar->mcastpsq)) 258 *flags |= WMI_DATA_HDR_FLAGS_MORE; 259 spin_unlock_bh(&ar->mcastpsq_lock); 260 } 261 } 262 } else { 263 conn = ath6kl_find_sta(vif, datap->h_dest); 264 if (!conn) { 265 dev_kfree_skb(skb); 266 267 /* Inform the caller that the skb is consumed */ 268 return true; 269 } 270 271 if (conn->sta_flags & STA_PS_SLEEP) { 272 ps_queued = ath6kl_process_uapsdq(conn, 273 vif, skb, flags); 274 if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD)) 275 ps_queued = ath6kl_process_psq(conn, 276 vif, skb, flags); 277 } 278 } 279 return ps_queued; 280 } 281 282 /* Tx functions */ 283 284 int ath6kl_control_tx(void *devt, struct sk_buff *skb, 285 enum htc_endpoint_id eid) 286 { 287 struct ath6kl *ar = devt; 288 int status = 0; 289 struct ath6kl_cookie *cookie = NULL; 290 291 if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW)) 292 return -EACCES; 293 294 spin_lock_bh(&ar->lock); 295 296 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 297 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__, 298 skb, skb->len, eid); 299 300 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) { 301 /* 302 * Control endpoint is full, don't allocate resources, we 303 * are just going to drop this packet. 304 */ 305 cookie = NULL; 306 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n", 307 skb, skb->len); 308 } else 309 cookie = ath6kl_alloc_cookie(ar); 310 311 if (cookie == NULL) { 312 spin_unlock_bh(&ar->lock); 313 status = -ENOMEM; 314 goto fail_ctrl_tx; 315 } 316 317 ar->tx_pending[eid]++; 318 319 if (eid != ar->ctrl_ep) 320 ar->total_tx_data_pend++; 321 322 spin_unlock_bh(&ar->lock); 323 324 cookie->skb = skb; 325 cookie->map_no = 0; 326 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 327 eid, ATH6KL_CONTROL_PKT_TAG); 328 cookie->htc_pkt.skb = skb; 329 330 /* 331 * This interface is asynchronous, if there is an error, cleanup 332 * will happen in the TX completion callback. 333 */ 334 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 335 336 return 0; 337 338 fail_ctrl_tx: 339 dev_kfree_skb(skb); 340 return status; 341 } 342 343 int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev) 344 { 345 struct ath6kl *ar = ath6kl_priv(dev); 346 struct ath6kl_cookie *cookie = NULL; 347 enum htc_endpoint_id eid = ENDPOINT_UNUSED; 348 struct ath6kl_vif *vif = netdev_priv(dev); 349 u32 map_no = 0; 350 u16 htc_tag = ATH6KL_DATA_PKT_TAG; 351 u8 ac = 99 ; /* initialize to unmapped ac */ 352 bool chk_adhoc_ps_mapping = false; 353 int ret; 354 struct wmi_tx_meta_v2 meta_v2; 355 void *meta; 356 u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed; 357 u8 meta_ver = 0; 358 u32 flags = 0; 359 360 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 361 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__, 362 skb, skb->data, skb->len); 363 364 /* If target is not associated */ 365 if (!test_bit(CONNECTED, &vif->flags)) 366 goto fail_tx; 367 368 if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON)) 369 goto fail_tx; 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 cookie->htc_pkt.skb = skb; 494 495 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ", 496 skb->data, skb->len); 497 498 /* 499 * HTC interface is asynchronous, if this fails, cleanup will 500 * happen in the ath6kl_tx_complete callback. 501 */ 502 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 503 504 return 0; 505 506 fail_tx: 507 dev_kfree_skb(skb); 508 509 vif->net_stats.tx_dropped++; 510 vif->net_stats.tx_aborted_errors++; 511 512 return 0; 513 } 514 515 /* indicate tx activity or inactivity on a WMI stream */ 516 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active) 517 { 518 struct ath6kl *ar = devt; 519 enum htc_endpoint_id eid; 520 int i; 521 522 eid = ar->ac2ep_map[traffic_class]; 523 524 if (!test_bit(WMI_ENABLED, &ar->flag)) 525 goto notify_htc; 526 527 spin_lock_bh(&ar->lock); 528 529 ar->ac_stream_active[traffic_class] = active; 530 531 if (active) { 532 /* 533 * Keep track of the active stream with the highest 534 * priority. 535 */ 536 if (ar->ac_stream_pri_map[traffic_class] > 537 ar->hiac_stream_active_pri) 538 /* set the new highest active priority */ 539 ar->hiac_stream_active_pri = 540 ar->ac_stream_pri_map[traffic_class]; 541 542 } else { 543 /* 544 * We may have to search for the next active stream 545 * that is the highest priority. 546 */ 547 if (ar->hiac_stream_active_pri == 548 ar->ac_stream_pri_map[traffic_class]) { 549 /* 550 * The highest priority stream just went inactive 551 * reset and search for the "next" highest "active" 552 * priority stream. 553 */ 554 ar->hiac_stream_active_pri = 0; 555 556 for (i = 0; i < WMM_NUM_AC; i++) { 557 if (ar->ac_stream_active[i] && 558 (ar->ac_stream_pri_map[i] > 559 ar->hiac_stream_active_pri)) 560 /* 561 * Set the new highest active 562 * priority. 563 */ 564 ar->hiac_stream_active_pri = 565 ar->ac_stream_pri_map[i]; 566 } 567 } 568 } 569 570 spin_unlock_bh(&ar->lock); 571 572 notify_htc: 573 /* notify HTC, this may cause credit distribution changes */ 574 ath6kl_htc_activity_changed(ar->htc_target, eid, active); 575 } 576 577 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target, 578 struct htc_packet *packet) 579 { 580 struct ath6kl *ar = target->dev->ar; 581 struct ath6kl_vif *vif; 582 enum htc_endpoint_id endpoint = packet->endpoint; 583 enum htc_send_full_action action = HTC_SEND_FULL_KEEP; 584 585 if (endpoint == ar->ctrl_ep) { 586 /* 587 * Under normal WMI if this is getting full, then something 588 * is running rampant the host should not be exhausting the 589 * WMI queue with too many commands the only exception to 590 * this is during testing using endpointping. 591 */ 592 set_bit(WMI_CTRL_EP_FULL, &ar->flag); 593 ath6kl_err("wmi ctrl ep is full\n"); 594 return action; 595 } 596 597 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG) 598 return action; 599 600 /* 601 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for 602 * the highest active stream. 603 */ 604 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] < 605 ar->hiac_stream_active_pri && 606 ar->cookie_count <= 607 target->endpoint[endpoint].tx_drop_packet_threshold) 608 /* 609 * Give preference to the highest priority stream by 610 * dropping the packets which overflowed. 611 */ 612 action = HTC_SEND_FULL_DROP; 613 614 /* FIXME: Locking */ 615 spin_lock_bh(&ar->list_lock); 616 list_for_each_entry(vif, &ar->vif_list, list) { 617 if (vif->nw_type == ADHOC_NETWORK || 618 action != HTC_SEND_FULL_DROP) { 619 spin_unlock_bh(&ar->list_lock); 620 621 set_bit(NETQ_STOPPED, &vif->flags); 622 netif_stop_queue(vif->ndev); 623 624 return action; 625 } 626 } 627 spin_unlock_bh(&ar->list_lock); 628 629 return action; 630 } 631 632 /* TODO this needs to be looked at */ 633 static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif, 634 enum htc_endpoint_id eid, u32 map_no) 635 { 636 struct ath6kl *ar = vif->ar; 637 u32 i; 638 639 if (vif->nw_type != ADHOC_NETWORK) 640 return; 641 642 if (!ar->ibss_ps_enable) 643 return; 644 645 if (eid == ar->ctrl_ep) 646 return; 647 648 if (map_no == 0) 649 return; 650 651 map_no--; 652 ar->node_map[map_no].tx_pend--; 653 654 if (ar->node_map[map_no].tx_pend) 655 return; 656 657 if (map_no != (ar->node_num - 1)) 658 return; 659 660 for (i = ar->node_num; i > 0; i--) { 661 if (ar->node_map[i - 1].tx_pend) 662 break; 663 664 memset(&ar->node_map[i - 1], 0, 665 sizeof(struct ath6kl_node_mapping)); 666 ar->node_num--; 667 } 668 } 669 670 void ath6kl_tx_complete(struct htc_target *target, 671 struct list_head *packet_queue) 672 { 673 struct ath6kl *ar = target->dev->ar; 674 struct sk_buff_head skb_queue; 675 struct htc_packet *packet; 676 struct sk_buff *skb; 677 struct ath6kl_cookie *ath6kl_cookie; 678 u32 map_no = 0; 679 int status; 680 enum htc_endpoint_id eid; 681 bool wake_event = false; 682 bool flushing[ATH6KL_VIF_MAX] = {false}; 683 u8 if_idx; 684 struct ath6kl_vif *vif; 685 686 skb_queue_head_init(&skb_queue); 687 688 /* lock the driver as we update internal state */ 689 spin_lock_bh(&ar->lock); 690 691 /* reap completed packets */ 692 while (!list_empty(packet_queue)) { 693 694 packet = list_first_entry(packet_queue, struct htc_packet, 695 list); 696 list_del(&packet->list); 697 698 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt; 699 if (!ath6kl_cookie) 700 goto fatal; 701 702 status = packet->status; 703 skb = ath6kl_cookie->skb; 704 eid = packet->endpoint; 705 map_no = ath6kl_cookie->map_no; 706 707 if (!skb || !skb->data) 708 goto fatal; 709 710 __skb_queue_tail(&skb_queue, skb); 711 712 if (!status && (packet->act_len != skb->len)) 713 goto fatal; 714 715 ar->tx_pending[eid]--; 716 717 if (eid != ar->ctrl_ep) 718 ar->total_tx_data_pend--; 719 720 if (eid == ar->ctrl_ep) { 721 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag)) 722 clear_bit(WMI_CTRL_EP_FULL, &ar->flag); 723 724 if (ar->tx_pending[eid] == 0) 725 wake_event = true; 726 } 727 728 if (eid == ar->ctrl_ep) { 729 if_idx = wmi_cmd_hdr_get_if_idx( 730 (struct wmi_cmd_hdr *) packet->buf); 731 } else { 732 if_idx = wmi_data_hdr_get_if_idx( 733 (struct wmi_data_hdr *) packet->buf); 734 } 735 736 vif = ath6kl_get_vif_by_index(ar, if_idx); 737 if (!vif) { 738 ath6kl_free_cookie(ar, ath6kl_cookie); 739 continue; 740 } 741 742 if (status) { 743 if (status == -ECANCELED) 744 /* a packet was flushed */ 745 flushing[if_idx] = true; 746 747 vif->net_stats.tx_errors++; 748 749 if (status != -ENOSPC && status != -ECANCELED) 750 ath6kl_warn("tx complete error: %d\n", status); 751 752 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 753 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 754 __func__, skb, packet->buf, packet->act_len, 755 eid, "error!"); 756 } else { 757 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 758 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 759 __func__, skb, packet->buf, packet->act_len, 760 eid, "OK"); 761 762 flushing[if_idx] = false; 763 vif->net_stats.tx_packets++; 764 vif->net_stats.tx_bytes += skb->len; 765 } 766 767 ath6kl_tx_clear_node_map(vif, eid, map_no); 768 769 ath6kl_free_cookie(ar, ath6kl_cookie); 770 771 if (test_bit(NETQ_STOPPED, &vif->flags)) 772 clear_bit(NETQ_STOPPED, &vif->flags); 773 } 774 775 spin_unlock_bh(&ar->lock); 776 777 __skb_queue_purge(&skb_queue); 778 779 /* FIXME: Locking */ 780 spin_lock_bh(&ar->list_lock); 781 list_for_each_entry(vif, &ar->vif_list, list) { 782 if (test_bit(CONNECTED, &vif->flags) && 783 !flushing[vif->fw_vif_idx]) { 784 spin_unlock_bh(&ar->list_lock); 785 netif_wake_queue(vif->ndev); 786 spin_lock_bh(&ar->list_lock); 787 } 788 } 789 spin_unlock_bh(&ar->list_lock); 790 791 if (wake_event) 792 wake_up(&ar->event_wq); 793 794 return; 795 796 fatal: 797 WARN_ON(1); 798 spin_unlock_bh(&ar->lock); 799 return; 800 } 801 802 void ath6kl_tx_data_cleanup(struct ath6kl *ar) 803 { 804 int i; 805 806 /* flush all the data (non-control) streams */ 807 for (i = 0; i < WMM_NUM_AC; i++) 808 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i], 809 ATH6KL_DATA_PKT_TAG); 810 } 811 812 /* Rx functions */ 813 814 static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev, 815 struct sk_buff *skb) 816 { 817 if (!skb) 818 return; 819 820 skb->dev = dev; 821 822 if (!(skb->dev->flags & IFF_UP)) { 823 dev_kfree_skb(skb); 824 return; 825 } 826 827 skb->protocol = eth_type_trans(skb, skb->dev); 828 829 netif_rx_ni(skb); 830 } 831 832 static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num) 833 { 834 struct sk_buff *skb; 835 836 while (num) { 837 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 838 if (!skb) { 839 ath6kl_err("netbuf allocation failed\n"); 840 return; 841 } 842 skb_queue_tail(q, skb); 843 num--; 844 } 845 } 846 847 static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr) 848 { 849 struct sk_buff *skb = NULL; 850 851 if (skb_queue_len(&p_aggr->rx_amsdu_freeq) < 852 (AGGR_NUM_OF_FREE_NETBUFS >> 2)) 853 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, 854 AGGR_NUM_OF_FREE_NETBUFS); 855 856 skb = skb_dequeue(&p_aggr->rx_amsdu_freeq); 857 858 return skb; 859 } 860 861 void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint) 862 { 863 struct ath6kl *ar = target->dev->ar; 864 struct sk_buff *skb; 865 int rx_buf; 866 int n_buf_refill; 867 struct htc_packet *packet; 868 struct list_head queue; 869 870 n_buf_refill = ATH6KL_MAX_RX_BUFFERS - 871 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint); 872 873 if (n_buf_refill <= 0) 874 return; 875 876 INIT_LIST_HEAD(&queue); 877 878 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 879 "%s: providing htc with %d buffers at eid=%d\n", 880 __func__, n_buf_refill, endpoint); 881 882 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) { 883 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 884 if (!skb) 885 break; 886 887 packet = (struct htc_packet *) skb->head; 888 if (!IS_ALIGNED((unsigned long) skb->data, 4)) 889 skb->data = PTR_ALIGN(skb->data - 4, 4); 890 set_htc_rxpkt_info(packet, skb, skb->data, 891 ATH6KL_BUFFER_SIZE, endpoint); 892 packet->skb = skb; 893 list_add_tail(&packet->list, &queue); 894 } 895 896 if (!list_empty(&queue)) 897 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue); 898 } 899 900 void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count) 901 { 902 struct htc_packet *packet; 903 struct sk_buff *skb; 904 905 while (count) { 906 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE); 907 if (!skb) 908 return; 909 910 packet = (struct htc_packet *) skb->head; 911 if (!IS_ALIGNED((unsigned long) skb->data, 4)) 912 skb->data = PTR_ALIGN(skb->data - 4, 4); 913 set_htc_rxpkt_info(packet, skb, skb->data, 914 ATH6KL_AMSDU_BUFFER_SIZE, 0); 915 packet->skb = skb; 916 917 spin_lock_bh(&ar->lock); 918 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue); 919 spin_unlock_bh(&ar->lock); 920 count--; 921 } 922 } 923 924 /* 925 * Callback to allocate a receive buffer for a pending packet. We use a 926 * pre-allocated list of buffers of maximum AMSDU size (4K). 927 */ 928 struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target, 929 enum htc_endpoint_id endpoint, 930 int len) 931 { 932 struct ath6kl *ar = target->dev->ar; 933 struct htc_packet *packet = NULL; 934 struct list_head *pkt_pos; 935 int refill_cnt = 0, depth = 0; 936 937 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n", 938 __func__, endpoint, len); 939 940 if ((len <= ATH6KL_BUFFER_SIZE) || 941 (len > ATH6KL_AMSDU_BUFFER_SIZE)) 942 return NULL; 943 944 spin_lock_bh(&ar->lock); 945 946 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 947 spin_unlock_bh(&ar->lock); 948 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS; 949 goto refill_buf; 950 } 951 952 packet = list_first_entry(&ar->amsdu_rx_buffer_queue, 953 struct htc_packet, list); 954 list_del(&packet->list); 955 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue) 956 depth++; 957 958 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth; 959 spin_unlock_bh(&ar->lock); 960 961 /* set actual endpoint ID */ 962 packet->endpoint = endpoint; 963 964 refill_buf: 965 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD) 966 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt); 967 968 return packet; 969 } 970 971 static void aggr_slice_amsdu(struct aggr_info *p_aggr, 972 struct rxtid *rxtid, struct sk_buff *skb) 973 { 974 struct sk_buff *new_skb; 975 struct ethhdr *hdr; 976 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len; 977 u8 *framep; 978 979 mac_hdr_len = sizeof(struct ethhdr); 980 framep = skb->data + mac_hdr_len; 981 amsdu_len = skb->len - mac_hdr_len; 982 983 while (amsdu_len > mac_hdr_len) { 984 hdr = (struct ethhdr *) framep; 985 payload_8023_len = ntohs(hdr->h_proto); 986 987 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN || 988 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) { 989 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n", 990 payload_8023_len); 991 break; 992 } 993 994 frame_8023_len = payload_8023_len + mac_hdr_len; 995 new_skb = aggr_get_free_skb(p_aggr); 996 if (!new_skb) { 997 ath6kl_err("no buffer available\n"); 998 break; 999 } 1000 1001 memcpy(new_skb->data, framep, frame_8023_len); 1002 skb_put(new_skb, frame_8023_len); 1003 if (ath6kl_wmi_dot3_2_dix(new_skb)) { 1004 ath6kl_err("dot3_2_dix error\n"); 1005 dev_kfree_skb(new_skb); 1006 break; 1007 } 1008 1009 skb_queue_tail(&rxtid->q, new_skb); 1010 1011 /* Is this the last subframe within this aggregate ? */ 1012 if ((amsdu_len - frame_8023_len) == 0) 1013 break; 1014 1015 /* Add the length of A-MSDU subframe padding bytes - 1016 * Round to nearest word. 1017 */ 1018 frame_8023_len = ALIGN(frame_8023_len, 4); 1019 1020 framep += frame_8023_len; 1021 amsdu_len -= frame_8023_len; 1022 } 1023 1024 dev_kfree_skb(skb); 1025 } 1026 1027 static void aggr_deque_frms(struct aggr_info_conn *agg_conn, u8 tid, 1028 u16 seq_no, u8 order) 1029 { 1030 struct sk_buff *skb; 1031 struct rxtid *rxtid; 1032 struct skb_hold_q *node; 1033 u16 idx, idx_end, seq_end; 1034 struct rxtid_stats *stats; 1035 1036 rxtid = &agg_conn->rx_tid[tid]; 1037 stats = &agg_conn->stat[tid]; 1038 1039 spin_lock_bh(&rxtid->lock); 1040 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1041 1042 /* 1043 * idx_end is typically the last possible frame in the window, 1044 * but changes to 'the' seq_no, when BAR comes. If seq_no 1045 * is non-zero, we will go up to that and stop. 1046 * Note: last seq no in current window will occupy the same 1047 * index position as index that is just previous to start. 1048 * An imp point : if win_sz is 7, for seq_no space of 4095, 1049 * then, there would be holes when sequence wrap around occurs. 1050 * Target should judiciously choose the win_sz, based on 1051 * this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz 1052 * 2, 4, 8, 16 win_sz works fine). 1053 * We must deque from "idx" to "idx_end", including both. 1054 */ 1055 seq_end = seq_no ? seq_no : rxtid->seq_next; 1056 idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz); 1057 1058 do { 1059 node = &rxtid->hold_q[idx]; 1060 if ((order == 1) && (!node->skb)) 1061 break; 1062 1063 if (node->skb) { 1064 if (node->is_amsdu) 1065 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, 1066 node->skb); 1067 else 1068 skb_queue_tail(&rxtid->q, node->skb); 1069 node->skb = NULL; 1070 } else 1071 stats->num_hole++; 1072 1073 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next); 1074 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1075 } while (idx != idx_end); 1076 1077 spin_unlock_bh(&rxtid->lock); 1078 1079 stats->num_delivered += skb_queue_len(&rxtid->q); 1080 1081 while ((skb = skb_dequeue(&rxtid->q))) 1082 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, skb); 1083 } 1084 1085 static bool aggr_process_recv_frm(struct aggr_info_conn *agg_conn, u8 tid, 1086 u16 seq_no, 1087 bool is_amsdu, struct sk_buff *frame) 1088 { 1089 struct rxtid *rxtid; 1090 struct rxtid_stats *stats; 1091 struct sk_buff *skb; 1092 struct skb_hold_q *node; 1093 u16 idx, st, cur, end; 1094 bool is_queued = false; 1095 u16 extended_end; 1096 1097 rxtid = &agg_conn->rx_tid[tid]; 1098 stats = &agg_conn->stat[tid]; 1099 1100 stats->num_into_aggr++; 1101 1102 if (!rxtid->aggr) { 1103 if (is_amsdu) { 1104 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, frame); 1105 is_queued = true; 1106 stats->num_amsdu++; 1107 while ((skb = skb_dequeue(&rxtid->q))) 1108 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, 1109 skb); 1110 } 1111 return is_queued; 1112 } 1113 1114 /* Check the incoming sequence no, if it's in the window */ 1115 st = rxtid->seq_next; 1116 cur = seq_no; 1117 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO; 1118 1119 if (((st < end) && (cur < st || cur > end)) || 1120 ((st > end) && (cur > end) && (cur < st))) { 1121 extended_end = (end + rxtid->hold_q_sz - 1) & 1122 ATH6KL_MAX_SEQ_NO; 1123 1124 if (((end < extended_end) && 1125 (cur < end || cur > extended_end)) || 1126 ((end > extended_end) && (cur > extended_end) && 1127 (cur < end))) { 1128 aggr_deque_frms(agg_conn, tid, 0, 0); 1129 spin_lock_bh(&rxtid->lock); 1130 if (cur >= rxtid->hold_q_sz - 1) 1131 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1); 1132 else 1133 rxtid->seq_next = ATH6KL_MAX_SEQ_NO - 1134 (rxtid->hold_q_sz - 2 - cur); 1135 spin_unlock_bh(&rxtid->lock); 1136 } else { 1137 /* 1138 * Dequeue only those frames that are outside the 1139 * new shifted window. 1140 */ 1141 if (cur >= rxtid->hold_q_sz - 1) 1142 st = cur - (rxtid->hold_q_sz - 1); 1143 else 1144 st = ATH6KL_MAX_SEQ_NO - 1145 (rxtid->hold_q_sz - 2 - cur); 1146 1147 aggr_deque_frms(agg_conn, tid, st, 0); 1148 } 1149 1150 stats->num_oow++; 1151 } 1152 1153 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz); 1154 1155 node = &rxtid->hold_q[idx]; 1156 1157 spin_lock_bh(&rxtid->lock); 1158 1159 /* 1160 * Is the cur frame duplicate or something beyond our window(hold_q 1161 * -> which is 2x, already)? 1162 * 1163 * 1. Duplicate is easy - drop incoming frame. 1164 * 2. Not falling in current sliding window. 1165 * 2a. is the frame_seq_no preceding current tid_seq_no? 1166 * -> drop the frame. perhaps sender did not get our ACK. 1167 * this is taken care of above. 1168 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ); 1169 * -> Taken care of it above, by moving window forward. 1170 */ 1171 dev_kfree_skb(node->skb); 1172 stats->num_dups++; 1173 1174 node->skb = frame; 1175 is_queued = true; 1176 node->is_amsdu = is_amsdu; 1177 node->seq_no = seq_no; 1178 1179 if (node->is_amsdu) 1180 stats->num_amsdu++; 1181 else 1182 stats->num_mpdu++; 1183 1184 spin_unlock_bh(&rxtid->lock); 1185 1186 aggr_deque_frms(agg_conn, tid, 0, 1); 1187 1188 if (agg_conn->timer_scheduled) 1189 return is_queued; 1190 1191 spin_lock_bh(&rxtid->lock); 1192 for (idx = 0 ; idx < rxtid->hold_q_sz; idx++) { 1193 if (rxtid->hold_q[idx].skb) { 1194 /* 1195 * There is a frame in the queue and no 1196 * timer so start a timer to ensure that 1197 * the frame doesn't remain stuck 1198 * forever. 1199 */ 1200 agg_conn->timer_scheduled = true; 1201 mod_timer(&agg_conn->timer, 1202 (jiffies + (HZ * AGGR_RX_TIMEOUT) / 1000)); 1203 rxtid->timer_mon = true; 1204 break; 1205 } 1206 } 1207 spin_unlock_bh(&rxtid->lock); 1208 1209 return is_queued; 1210 } 1211 1212 static void ath6kl_uapsd_trigger_frame_rx(struct ath6kl_vif *vif, 1213 struct ath6kl_sta *conn) 1214 { 1215 struct ath6kl *ar = vif->ar; 1216 bool is_apsdq_empty, is_apsdq_empty_at_start; 1217 u32 num_frames_to_deliver, flags; 1218 struct sk_buff *skb = NULL; 1219 1220 /* 1221 * If the APSD q for this STA is not empty, dequeue and 1222 * send a pkt from the head of the q. Also update the 1223 * More data bit in the WMI_DATA_HDR if there are 1224 * more pkts for this STA in the APSD q. 1225 * If there are no more pkts for this STA, 1226 * update the APSD bitmap for this STA. 1227 */ 1228 1229 num_frames_to_deliver = (conn->apsd_info >> ATH6KL_APSD_NUM_OF_AC) & 1230 ATH6KL_APSD_FRAME_MASK; 1231 /* 1232 * Number of frames to send in a service period is 1233 * indicated by the station 1234 * in the QOS_INFO of the association request 1235 * If it is zero, send all frames 1236 */ 1237 if (!num_frames_to_deliver) 1238 num_frames_to_deliver = ATH6KL_APSD_ALL_FRAME; 1239 1240 spin_lock_bh(&conn->psq_lock); 1241 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1242 spin_unlock_bh(&conn->psq_lock); 1243 is_apsdq_empty_at_start = is_apsdq_empty; 1244 1245 while ((!is_apsdq_empty) && (num_frames_to_deliver)) { 1246 1247 spin_lock_bh(&conn->psq_lock); 1248 skb = skb_dequeue(&conn->apsdq); 1249 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1250 spin_unlock_bh(&conn->psq_lock); 1251 1252 /* 1253 * Set the STA flag to Trigger delivery, 1254 * so that the frame will go out 1255 */ 1256 conn->sta_flags |= STA_PS_APSD_TRIGGER; 1257 num_frames_to_deliver--; 1258 1259 /* Last frame in the service period, set EOSP or queue empty */ 1260 if ((is_apsdq_empty) || (!num_frames_to_deliver)) 1261 conn->sta_flags |= STA_PS_APSD_EOSP; 1262 1263 ath6kl_data_tx(skb, vif->ndev); 1264 conn->sta_flags &= ~(STA_PS_APSD_TRIGGER); 1265 conn->sta_flags &= ~(STA_PS_APSD_EOSP); 1266 } 1267 1268 if (is_apsdq_empty) { 1269 if (is_apsdq_empty_at_start) 1270 flags = WMI_AP_APSD_NO_DELIVERY_FRAMES; 1271 else 1272 flags = 0; 1273 1274 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 1275 vif->fw_vif_idx, 1276 conn->aid, 0, flags); 1277 } 1278 1279 return; 1280 } 1281 1282 void ath6kl_rx(struct htc_target *target, struct htc_packet *packet) 1283 { 1284 struct ath6kl *ar = target->dev->ar; 1285 struct sk_buff *skb = packet->pkt_cntxt; 1286 struct wmi_rx_meta_v2 *meta; 1287 struct wmi_data_hdr *dhdr; 1288 int min_hdr_len; 1289 u8 meta_type, dot11_hdr = 0; 1290 u8 pad_before_data_start; 1291 int status = packet->status; 1292 enum htc_endpoint_id ept = packet->endpoint; 1293 bool is_amsdu, prev_ps, ps_state = false; 1294 bool trig_state = false; 1295 struct ath6kl_sta *conn = NULL; 1296 struct sk_buff *skb1 = NULL; 1297 struct ethhdr *datap = NULL; 1298 struct ath6kl_vif *vif; 1299 struct aggr_info_conn *aggr_conn; 1300 u16 seq_no, offset; 1301 u8 tid, if_idx; 1302 1303 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 1304 "%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d", 1305 __func__, ar, ept, skb, packet->buf, 1306 packet->act_len, status); 1307 1308 if (status || !(skb->data + HTC_HDR_LENGTH)) { 1309 dev_kfree_skb(skb); 1310 return; 1311 } 1312 1313 skb_put(skb, packet->act_len + HTC_HDR_LENGTH); 1314 skb_pull(skb, HTC_HDR_LENGTH); 1315 1316 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "rx ", 1317 skb->data, skb->len); 1318 1319 if (ept == ar->ctrl_ep) { 1320 if (test_bit(WMI_ENABLED, &ar->flag)) { 1321 ath6kl_check_wow_status(ar); 1322 ath6kl_wmi_control_rx(ar->wmi, skb); 1323 return; 1324 } 1325 if_idx = 1326 wmi_cmd_hdr_get_if_idx((struct wmi_cmd_hdr *) skb->data); 1327 } else { 1328 if_idx = 1329 wmi_data_hdr_get_if_idx((struct wmi_data_hdr *) skb->data); 1330 } 1331 1332 vif = ath6kl_get_vif_by_index(ar, if_idx); 1333 if (!vif) { 1334 dev_kfree_skb(skb); 1335 return; 1336 } 1337 1338 /* 1339 * Take lock to protect buffer counts and adaptive power throughput 1340 * state. 1341 */ 1342 spin_lock_bh(&vif->if_lock); 1343 1344 vif->net_stats.rx_packets++; 1345 vif->net_stats.rx_bytes += packet->act_len; 1346 1347 spin_unlock_bh(&vif->if_lock); 1348 1349 skb->dev = vif->ndev; 1350 1351 if (!test_bit(WMI_ENABLED, &ar->flag)) { 1352 if (EPPING_ALIGNMENT_PAD > 0) 1353 skb_pull(skb, EPPING_ALIGNMENT_PAD); 1354 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1355 return; 1356 } 1357 1358 ath6kl_check_wow_status(ar); 1359 1360 min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) + 1361 sizeof(struct ath6kl_llc_snap_hdr); 1362 1363 dhdr = (struct wmi_data_hdr *) skb->data; 1364 1365 /* 1366 * In the case of AP mode we may receive NULL data frames 1367 * that do not have LLC hdr. They are 16 bytes in size. 1368 * Allow these frames in the AP mode. 1369 */ 1370 if (vif->nw_type != AP_NETWORK && 1371 ((packet->act_len < min_hdr_len) || 1372 (packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) { 1373 ath6kl_info("frame len is too short or too long\n"); 1374 vif->net_stats.rx_errors++; 1375 vif->net_stats.rx_length_errors++; 1376 dev_kfree_skb(skb); 1377 return; 1378 } 1379 1380 /* Get the Power save state of the STA */ 1381 if (vif->nw_type == AP_NETWORK) { 1382 meta_type = wmi_data_hdr_get_meta(dhdr); 1383 1384 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) & 1385 WMI_DATA_HDR_PS_MASK); 1386 1387 offset = sizeof(struct wmi_data_hdr); 1388 trig_state = !!(le16_to_cpu(dhdr->info3) & WMI_DATA_HDR_TRIG); 1389 1390 switch (meta_type) { 1391 case 0: 1392 break; 1393 case WMI_META_VERSION_1: 1394 offset += sizeof(struct wmi_rx_meta_v1); 1395 break; 1396 case WMI_META_VERSION_2: 1397 offset += sizeof(struct wmi_rx_meta_v2); 1398 break; 1399 default: 1400 break; 1401 } 1402 1403 datap = (struct ethhdr *) (skb->data + offset); 1404 conn = ath6kl_find_sta(vif, datap->h_source); 1405 1406 if (!conn) { 1407 dev_kfree_skb(skb); 1408 return; 1409 } 1410 1411 /* 1412 * If there is a change in PS state of the STA, 1413 * take appropriate steps: 1414 * 1415 * 1. If Sleep-->Awake, flush the psq for the STA 1416 * Clear the PVB for the STA. 1417 * 2. If Awake-->Sleep, Starting queueing frames 1418 * the STA. 1419 */ 1420 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP); 1421 1422 if (ps_state) 1423 conn->sta_flags |= STA_PS_SLEEP; 1424 else 1425 conn->sta_flags &= ~STA_PS_SLEEP; 1426 1427 /* Accept trigger only when the station is in sleep */ 1428 if ((conn->sta_flags & STA_PS_SLEEP) && trig_state) 1429 ath6kl_uapsd_trigger_frame_rx(vif, conn); 1430 1431 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) { 1432 if (!(conn->sta_flags & STA_PS_SLEEP)) { 1433 struct sk_buff *skbuff = NULL; 1434 bool is_apsdq_empty; 1435 struct ath6kl_mgmt_buff *mgmt; 1436 u8 idx; 1437 1438 spin_lock_bh(&conn->psq_lock); 1439 while (conn->mgmt_psq_len > 0) { 1440 mgmt = list_first_entry( 1441 &conn->mgmt_psq, 1442 struct ath6kl_mgmt_buff, 1443 list); 1444 list_del(&mgmt->list); 1445 conn->mgmt_psq_len--; 1446 spin_unlock_bh(&conn->psq_lock); 1447 idx = vif->fw_vif_idx; 1448 1449 ath6kl_wmi_send_mgmt_cmd(ar->wmi, 1450 idx, 1451 mgmt->id, 1452 mgmt->freq, 1453 mgmt->wait, 1454 mgmt->buf, 1455 mgmt->len, 1456 mgmt->no_cck); 1457 1458 kfree(mgmt); 1459 spin_lock_bh(&conn->psq_lock); 1460 } 1461 conn->mgmt_psq_len = 0; 1462 while ((skbuff = skb_dequeue(&conn->psq))) { 1463 spin_unlock_bh(&conn->psq_lock); 1464 ath6kl_data_tx(skbuff, vif->ndev); 1465 spin_lock_bh(&conn->psq_lock); 1466 } 1467 1468 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1469 while ((skbuff = skb_dequeue(&conn->apsdq))) { 1470 spin_unlock_bh(&conn->psq_lock); 1471 ath6kl_data_tx(skbuff, vif->ndev); 1472 spin_lock_bh(&conn->psq_lock); 1473 } 1474 spin_unlock_bh(&conn->psq_lock); 1475 1476 if (!is_apsdq_empty) 1477 ath6kl_wmi_set_apsd_bfrd_traf( 1478 ar->wmi, 1479 vif->fw_vif_idx, 1480 conn->aid, 0, 0); 1481 1482 /* Clear the PVB for this STA */ 1483 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, 1484 conn->aid, 0); 1485 } 1486 } 1487 1488 /* drop NULL data frames here */ 1489 if ((packet->act_len < min_hdr_len) || 1490 (packet->act_len > 1491 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) { 1492 dev_kfree_skb(skb); 1493 return; 1494 } 1495 } 1496 1497 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false; 1498 tid = wmi_data_hdr_get_up(dhdr); 1499 seq_no = wmi_data_hdr_get_seqno(dhdr); 1500 meta_type = wmi_data_hdr_get_meta(dhdr); 1501 dot11_hdr = wmi_data_hdr_get_dot11(dhdr); 1502 pad_before_data_start = 1503 (le16_to_cpu(dhdr->info3) >> WMI_DATA_HDR_PAD_BEFORE_DATA_SHIFT) 1504 & WMI_DATA_HDR_PAD_BEFORE_DATA_MASK; 1505 1506 skb_pull(skb, sizeof(struct wmi_data_hdr)); 1507 1508 switch (meta_type) { 1509 case WMI_META_VERSION_1: 1510 skb_pull(skb, sizeof(struct wmi_rx_meta_v1)); 1511 break; 1512 case WMI_META_VERSION_2: 1513 meta = (struct wmi_rx_meta_v2 *) skb->data; 1514 if (meta->csum_flags & 0x1) { 1515 skb->ip_summed = CHECKSUM_COMPLETE; 1516 skb->csum = (__force __wsum) meta->csum; 1517 } 1518 skb_pull(skb, sizeof(struct wmi_rx_meta_v2)); 1519 break; 1520 default: 1521 break; 1522 } 1523 1524 skb_pull(skb, pad_before_data_start); 1525 1526 if (dot11_hdr) 1527 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb); 1528 else if (!is_amsdu) 1529 status = ath6kl_wmi_dot3_2_dix(skb); 1530 1531 if (status) { 1532 /* 1533 * Drop frames that could not be processed (lack of 1534 * memory, etc.) 1535 */ 1536 dev_kfree_skb(skb); 1537 return; 1538 } 1539 1540 if (!(vif->ndev->flags & IFF_UP)) { 1541 dev_kfree_skb(skb); 1542 return; 1543 } 1544 1545 if (vif->nw_type == AP_NETWORK) { 1546 datap = (struct ethhdr *) skb->data; 1547 if (is_multicast_ether_addr(datap->h_dest)) 1548 /* 1549 * Bcast/Mcast frames should be sent to the 1550 * OS stack as well as on the air. 1551 */ 1552 skb1 = skb_copy(skb, GFP_ATOMIC); 1553 else { 1554 /* 1555 * Search for a connected STA with dstMac 1556 * as the Mac address. If found send the 1557 * frame to it on the air else send the 1558 * frame up the stack. 1559 */ 1560 conn = ath6kl_find_sta(vif, datap->h_dest); 1561 1562 if (conn && ar->intra_bss) { 1563 skb1 = skb; 1564 skb = NULL; 1565 } else if (conn && !ar->intra_bss) { 1566 dev_kfree_skb(skb); 1567 skb = NULL; 1568 } 1569 } 1570 if (skb1) 1571 ath6kl_data_tx(skb1, vif->ndev); 1572 1573 if (skb == NULL) { 1574 /* nothing to deliver up the stack */ 1575 return; 1576 } 1577 } 1578 1579 datap = (struct ethhdr *) skb->data; 1580 1581 if (is_unicast_ether_addr(datap->h_dest)) { 1582 if (vif->nw_type == AP_NETWORK) { 1583 conn = ath6kl_find_sta(vif, datap->h_source); 1584 if (!conn) 1585 return; 1586 aggr_conn = conn->aggr_conn; 1587 } else 1588 aggr_conn = vif->aggr_cntxt->aggr_conn; 1589 1590 if (aggr_process_recv_frm(aggr_conn, tid, seq_no, 1591 is_amsdu, skb)) { 1592 /* aggregation code will handle the skb */ 1593 return; 1594 } 1595 } else if (!is_broadcast_ether_addr(datap->h_dest)) 1596 vif->net_stats.multicast++; 1597 1598 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1599 } 1600 1601 static void aggr_timeout(unsigned long arg) 1602 { 1603 u8 i, j; 1604 struct aggr_info_conn *aggr_conn = (struct aggr_info_conn *) arg; 1605 struct rxtid *rxtid; 1606 struct rxtid_stats *stats; 1607 1608 for (i = 0; i < NUM_OF_TIDS; i++) { 1609 rxtid = &aggr_conn->rx_tid[i]; 1610 stats = &aggr_conn->stat[i]; 1611 1612 if (!rxtid->aggr || !rxtid->timer_mon) 1613 continue; 1614 1615 stats->num_timeouts++; 1616 ath6kl_dbg(ATH6KL_DBG_AGGR, 1617 "aggr timeout (st %d end %d)\n", 1618 rxtid->seq_next, 1619 ((rxtid->seq_next + rxtid->hold_q_sz-1) & 1620 ATH6KL_MAX_SEQ_NO)); 1621 aggr_deque_frms(aggr_conn, i, 0, 0); 1622 } 1623 1624 aggr_conn->timer_scheduled = false; 1625 1626 for (i = 0; i < NUM_OF_TIDS; i++) { 1627 rxtid = &aggr_conn->rx_tid[i]; 1628 1629 if (rxtid->aggr && rxtid->hold_q) { 1630 spin_lock_bh(&rxtid->lock); 1631 for (j = 0; j < rxtid->hold_q_sz; j++) { 1632 if (rxtid->hold_q[j].skb) { 1633 aggr_conn->timer_scheduled = true; 1634 rxtid->timer_mon = true; 1635 break; 1636 } 1637 } 1638 spin_unlock_bh(&rxtid->lock); 1639 1640 if (j >= rxtid->hold_q_sz) 1641 rxtid->timer_mon = false; 1642 } 1643 } 1644 1645 if (aggr_conn->timer_scheduled) 1646 mod_timer(&aggr_conn->timer, 1647 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT)); 1648 } 1649 1650 static void aggr_delete_tid_state(struct aggr_info_conn *aggr_conn, u8 tid) 1651 { 1652 struct rxtid *rxtid; 1653 struct rxtid_stats *stats; 1654 1655 if (!aggr_conn || tid >= NUM_OF_TIDS) 1656 return; 1657 1658 rxtid = &aggr_conn->rx_tid[tid]; 1659 stats = &aggr_conn->stat[tid]; 1660 1661 if (rxtid->aggr) 1662 aggr_deque_frms(aggr_conn, tid, 0, 0); 1663 1664 rxtid->aggr = false; 1665 rxtid->timer_mon = false; 1666 rxtid->win_sz = 0; 1667 rxtid->seq_next = 0; 1668 rxtid->hold_q_sz = 0; 1669 1670 kfree(rxtid->hold_q); 1671 rxtid->hold_q = NULL; 1672 1673 memset(stats, 0, sizeof(struct rxtid_stats)); 1674 } 1675 1676 void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid_mux, u16 seq_no, 1677 u8 win_sz) 1678 { 1679 struct ath6kl_sta *sta; 1680 struct aggr_info_conn *aggr_conn = NULL; 1681 struct rxtid *rxtid; 1682 struct rxtid_stats *stats; 1683 u16 hold_q_size; 1684 u8 tid, aid; 1685 1686 if (vif->nw_type == AP_NETWORK) { 1687 aid = ath6kl_get_aid(tid_mux); 1688 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1689 if (sta) 1690 aggr_conn = sta->aggr_conn; 1691 } else 1692 aggr_conn = vif->aggr_cntxt->aggr_conn; 1693 1694 if (!aggr_conn) 1695 return; 1696 1697 tid = ath6kl_get_tid(tid_mux); 1698 if (tid >= NUM_OF_TIDS) 1699 return; 1700 1701 rxtid = &aggr_conn->rx_tid[tid]; 1702 stats = &aggr_conn->stat[tid]; 1703 1704 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX) 1705 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n", 1706 __func__, win_sz, tid); 1707 1708 if (rxtid->aggr) 1709 aggr_delete_tid_state(aggr_conn, tid); 1710 1711 rxtid->seq_next = seq_no; 1712 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q); 1713 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL); 1714 if (!rxtid->hold_q) 1715 return; 1716 1717 rxtid->win_sz = win_sz; 1718 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz); 1719 if (!skb_queue_empty(&rxtid->q)) 1720 return; 1721 1722 rxtid->aggr = true; 1723 } 1724 1725 void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info, 1726 struct aggr_info_conn *aggr_conn) 1727 { 1728 struct rxtid *rxtid; 1729 u8 i; 1730 1731 aggr_conn->aggr_sz = AGGR_SZ_DEFAULT; 1732 aggr_conn->dev = vif->ndev; 1733 init_timer(&aggr_conn->timer); 1734 aggr_conn->timer.function = aggr_timeout; 1735 aggr_conn->timer.data = (unsigned long) aggr_conn; 1736 aggr_conn->aggr_info = aggr_info; 1737 1738 aggr_conn->timer_scheduled = false; 1739 1740 for (i = 0; i < NUM_OF_TIDS; i++) { 1741 rxtid = &aggr_conn->rx_tid[i]; 1742 rxtid->aggr = false; 1743 rxtid->timer_mon = false; 1744 skb_queue_head_init(&rxtid->q); 1745 spin_lock_init(&rxtid->lock); 1746 } 1747 1748 } 1749 1750 struct aggr_info *aggr_init(struct ath6kl_vif *vif) 1751 { 1752 struct aggr_info *p_aggr = NULL; 1753 1754 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL); 1755 if (!p_aggr) { 1756 ath6kl_err("failed to alloc memory for aggr_node\n"); 1757 return NULL; 1758 } 1759 1760 p_aggr->aggr_conn = kzalloc(sizeof(struct aggr_info_conn), GFP_KERNEL); 1761 if (!p_aggr->aggr_conn) { 1762 ath6kl_err("failed to alloc memory for connection specific aggr info\n"); 1763 kfree(p_aggr); 1764 return NULL; 1765 } 1766 1767 aggr_conn_init(vif, p_aggr, p_aggr->aggr_conn); 1768 1769 skb_queue_head_init(&p_aggr->rx_amsdu_freeq); 1770 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, AGGR_NUM_OF_FREE_NETBUFS); 1771 1772 return p_aggr; 1773 } 1774 1775 void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid_mux) 1776 { 1777 struct ath6kl_sta *sta; 1778 struct rxtid *rxtid; 1779 struct aggr_info_conn *aggr_conn = NULL; 1780 u8 tid, aid; 1781 1782 if (vif->nw_type == AP_NETWORK) { 1783 aid = ath6kl_get_aid(tid_mux); 1784 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1785 if (sta) 1786 aggr_conn = sta->aggr_conn; 1787 } else 1788 aggr_conn = vif->aggr_cntxt->aggr_conn; 1789 1790 if (!aggr_conn) 1791 return; 1792 1793 tid = ath6kl_get_tid(tid_mux); 1794 if (tid >= NUM_OF_TIDS) 1795 return; 1796 1797 rxtid = &aggr_conn->rx_tid[tid]; 1798 1799 if (rxtid->aggr) 1800 aggr_delete_tid_state(aggr_conn, tid); 1801 } 1802 1803 void aggr_reset_state(struct aggr_info_conn *aggr_conn) 1804 { 1805 u8 tid; 1806 1807 if (!aggr_conn) 1808 return; 1809 1810 if (aggr_conn->timer_scheduled) { 1811 del_timer(&aggr_conn->timer); 1812 aggr_conn->timer_scheduled = false; 1813 } 1814 1815 for (tid = 0; tid < NUM_OF_TIDS; tid++) 1816 aggr_delete_tid_state(aggr_conn, tid); 1817 } 1818 1819 /* clean up our amsdu buffer list */ 1820 void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar) 1821 { 1822 struct htc_packet *packet, *tmp_pkt; 1823 1824 spin_lock_bh(&ar->lock); 1825 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 1826 spin_unlock_bh(&ar->lock); 1827 return; 1828 } 1829 1830 list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue, 1831 list) { 1832 list_del(&packet->list); 1833 spin_unlock_bh(&ar->lock); 1834 dev_kfree_skb(packet->pkt_cntxt); 1835 spin_lock_bh(&ar->lock); 1836 } 1837 1838 spin_unlock_bh(&ar->lock); 1839 } 1840 1841 void aggr_module_destroy(struct aggr_info *aggr_info) 1842 { 1843 if (!aggr_info) 1844 return; 1845 1846 aggr_reset_state(aggr_info->aggr_conn); 1847 skb_queue_purge(&aggr_info->rx_amsdu_freeq); 1848 kfree(aggr_info->aggr_conn); 1849 kfree(aggr_info); 1850 } 1851