1 /* 2 * Copyright (c) 2004-2011 Atheros Communications Inc. 3 * Copyright (c) 2011-2012 Qualcomm Atheros, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 19 20 #include "core.h" 21 #include "debug.h" 22 #include "htc-ops.h" 23 24 /* 25 * tid - tid_mux0..tid_mux3 26 * aid - tid_mux4..tid_mux7 27 */ 28 #define ATH6KL_TID_MASK 0xf 29 #define ATH6KL_AID_SHIFT 4 30 31 static inline u8 ath6kl_get_tid(u8 tid_mux) 32 { 33 return tid_mux & ATH6KL_TID_MASK; 34 } 35 36 static inline u8 ath6kl_get_aid(u8 tid_mux) 37 { 38 return tid_mux >> ATH6KL_AID_SHIFT; 39 } 40 41 static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev, 42 u32 *map_no) 43 { 44 struct ath6kl *ar = ath6kl_priv(dev); 45 struct ethhdr *eth_hdr; 46 u32 i, ep_map = -1; 47 u8 *datap; 48 49 *map_no = 0; 50 datap = skb->data; 51 eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr)); 52 53 if (is_multicast_ether_addr(eth_hdr->h_dest)) 54 return ENDPOINT_2; 55 56 for (i = 0; i < ar->node_num; i++) { 57 if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr, 58 ETH_ALEN) == 0) { 59 *map_no = i + 1; 60 ar->node_map[i].tx_pend++; 61 return ar->node_map[i].ep_id; 62 } 63 64 if ((ep_map == -1) && !ar->node_map[i].tx_pend) 65 ep_map = i; 66 } 67 68 if (ep_map == -1) { 69 ep_map = ar->node_num; 70 ar->node_num++; 71 if (ar->node_num > MAX_NODE_NUM) 72 return ENDPOINT_UNUSED; 73 } 74 75 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN); 76 77 for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) { 78 if (!ar->tx_pending[i]) { 79 ar->node_map[ep_map].ep_id = i; 80 break; 81 } 82 83 /* 84 * No free endpoint is available, start redistribution on 85 * the inuse endpoints. 86 */ 87 if (i == ENDPOINT_5) { 88 ar->node_map[ep_map].ep_id = ar->next_ep_id; 89 ar->next_ep_id++; 90 if (ar->next_ep_id > ENDPOINT_5) 91 ar->next_ep_id = ENDPOINT_2; 92 } 93 } 94 95 *map_no = ep_map + 1; 96 ar->node_map[ep_map].tx_pend++; 97 98 return ar->node_map[ep_map].ep_id; 99 } 100 101 static bool ath6kl_process_uapsdq(struct ath6kl_sta *conn, 102 struct ath6kl_vif *vif, 103 struct sk_buff *skb, 104 u32 *flags) 105 { 106 struct ath6kl *ar = vif->ar; 107 bool is_apsdq_empty = false; 108 struct ethhdr *datap = (struct ethhdr *) skb->data; 109 u8 up = 0, traffic_class, *ip_hdr; 110 u16 ether_type; 111 struct ath6kl_llc_snap_hdr *llc_hdr; 112 113 if (conn->sta_flags & STA_PS_APSD_TRIGGER) { 114 /* 115 * This tx is because of a uAPSD trigger, determine 116 * more and EOSP bit. Set EOSP if queue is empty 117 * or sufficient frames are delivered for this trigger. 118 */ 119 spin_lock_bh(&conn->psq_lock); 120 if (!skb_queue_empty(&conn->apsdq)) 121 *flags |= WMI_DATA_HDR_FLAGS_MORE; 122 else if (conn->sta_flags & STA_PS_APSD_EOSP) 123 *flags |= WMI_DATA_HDR_FLAGS_EOSP; 124 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 125 spin_unlock_bh(&conn->psq_lock); 126 return false; 127 } else if (!conn->apsd_info) 128 return false; 129 130 if (test_bit(WMM_ENABLED, &vif->flags)) { 131 ether_type = be16_to_cpu(datap->h_proto); 132 if (is_ethertype(ether_type)) { 133 /* packet is in DIX format */ 134 ip_hdr = (u8 *)(datap + 1); 135 } else { 136 /* packet is in 802.3 format */ 137 llc_hdr = (struct ath6kl_llc_snap_hdr *) 138 (datap + 1); 139 ether_type = be16_to_cpu(llc_hdr->eth_type); 140 ip_hdr = (u8 *)(llc_hdr + 1); 141 } 142 143 if (ether_type == IP_ETHERTYPE) 144 up = ath6kl_wmi_determine_user_priority( 145 ip_hdr, 0); 146 } 147 148 traffic_class = ath6kl_wmi_get_traffic_class(up); 149 150 if ((conn->apsd_info & (1 << traffic_class)) == 0) 151 return false; 152 153 /* Queue the frames if the STA is sleeping */ 154 spin_lock_bh(&conn->psq_lock); 155 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 156 skb_queue_tail(&conn->apsdq, skb); 157 spin_unlock_bh(&conn->psq_lock); 158 159 /* 160 * If this is the first pkt getting queued 161 * for this STA, update the PVB for this STA 162 */ 163 if (is_apsdq_empty) { 164 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 165 vif->fw_vif_idx, 166 conn->aid, 1, 0); 167 } 168 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 169 170 return true; 171 } 172 173 static bool ath6kl_process_psq(struct ath6kl_sta *conn, 174 struct ath6kl_vif *vif, 175 struct sk_buff *skb, 176 u32 *flags) 177 { 178 bool is_psq_empty = false; 179 struct ath6kl *ar = vif->ar; 180 181 if (conn->sta_flags & STA_PS_POLLED) { 182 spin_lock_bh(&conn->psq_lock); 183 if (!skb_queue_empty(&conn->psq)) 184 *flags |= WMI_DATA_HDR_FLAGS_MORE; 185 spin_unlock_bh(&conn->psq_lock); 186 return false; 187 } 188 189 /* Queue the frames if the STA is sleeping */ 190 spin_lock_bh(&conn->psq_lock); 191 is_psq_empty = skb_queue_empty(&conn->psq); 192 skb_queue_tail(&conn->psq, skb); 193 spin_unlock_bh(&conn->psq_lock); 194 195 /* 196 * If this is the first pkt getting queued 197 * for this STA, update the PVB for this 198 * STA. 199 */ 200 if (is_psq_empty) 201 ath6kl_wmi_set_pvb_cmd(ar->wmi, 202 vif->fw_vif_idx, 203 conn->aid, 1); 204 return true; 205 } 206 207 static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb, 208 u32 *flags) 209 { 210 struct ethhdr *datap = (struct ethhdr *) skb->data; 211 struct ath6kl_sta *conn = NULL; 212 bool ps_queued = false; 213 struct ath6kl *ar = vif->ar; 214 215 if (is_multicast_ether_addr(datap->h_dest)) { 216 u8 ctr = 0; 217 bool q_mcast = false; 218 219 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) { 220 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) { 221 q_mcast = true; 222 break; 223 } 224 } 225 226 if (q_mcast) { 227 /* 228 * If this transmit is not because of a Dtim Expiry 229 * q it. 230 */ 231 if (!test_bit(DTIM_EXPIRED, &vif->flags)) { 232 bool is_mcastq_empty = false; 233 234 spin_lock_bh(&ar->mcastpsq_lock); 235 is_mcastq_empty = 236 skb_queue_empty(&ar->mcastpsq); 237 skb_queue_tail(&ar->mcastpsq, skb); 238 spin_unlock_bh(&ar->mcastpsq_lock); 239 240 /* 241 * If this is the first Mcast pkt getting 242 * queued indicate to the target to set the 243 * BitmapControl LSB of the TIM IE. 244 */ 245 if (is_mcastq_empty) 246 ath6kl_wmi_set_pvb_cmd(ar->wmi, 247 vif->fw_vif_idx, 248 MCAST_AID, 1); 249 250 ps_queued = true; 251 } else { 252 /* 253 * This transmit is because of Dtim expiry. 254 * Determine if MoreData bit has to be set. 255 */ 256 spin_lock_bh(&ar->mcastpsq_lock); 257 if (!skb_queue_empty(&ar->mcastpsq)) 258 *flags |= WMI_DATA_HDR_FLAGS_MORE; 259 spin_unlock_bh(&ar->mcastpsq_lock); 260 } 261 } 262 } else { 263 conn = ath6kl_find_sta(vif, datap->h_dest); 264 if (!conn) { 265 dev_kfree_skb(skb); 266 267 /* Inform the caller that the skb is consumed */ 268 return true; 269 } 270 271 if (conn->sta_flags & STA_PS_SLEEP) { 272 ps_queued = ath6kl_process_uapsdq(conn, 273 vif, skb, flags); 274 if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD)) 275 ps_queued = ath6kl_process_psq(conn, 276 vif, skb, flags); 277 } 278 } 279 return ps_queued; 280 } 281 282 /* Tx functions */ 283 284 int ath6kl_control_tx(void *devt, struct sk_buff *skb, 285 enum htc_endpoint_id eid) 286 { 287 struct ath6kl *ar = devt; 288 int status = 0; 289 struct ath6kl_cookie *cookie = NULL; 290 291 if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW)) { 292 dev_kfree_skb(skb); 293 return -EACCES; 294 } 295 296 if (WARN_ON_ONCE(eid == ENDPOINT_UNUSED || 297 eid >= ENDPOINT_MAX)) { 298 status = -EINVAL; 299 goto fail_ctrl_tx; 300 } 301 302 spin_lock_bh(&ar->lock); 303 304 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 305 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__, 306 skb, skb->len, eid); 307 308 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) { 309 /* 310 * Control endpoint is full, don't allocate resources, we 311 * are just going to drop this packet. 312 */ 313 cookie = NULL; 314 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n", 315 skb, skb->len); 316 } else 317 cookie = ath6kl_alloc_cookie(ar); 318 319 if (cookie == NULL) { 320 spin_unlock_bh(&ar->lock); 321 status = -ENOMEM; 322 goto fail_ctrl_tx; 323 } 324 325 ar->tx_pending[eid]++; 326 327 if (eid != ar->ctrl_ep) 328 ar->total_tx_data_pend++; 329 330 spin_unlock_bh(&ar->lock); 331 332 cookie->skb = skb; 333 cookie->map_no = 0; 334 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 335 eid, ATH6KL_CONTROL_PKT_TAG); 336 cookie->htc_pkt.skb = skb; 337 338 /* 339 * This interface is asynchronous, if there is an error, cleanup 340 * will happen in the TX completion callback. 341 */ 342 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 343 344 return 0; 345 346 fail_ctrl_tx: 347 dev_kfree_skb(skb); 348 return status; 349 } 350 351 int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev) 352 { 353 struct ath6kl *ar = ath6kl_priv(dev); 354 struct ath6kl_cookie *cookie = NULL; 355 enum htc_endpoint_id eid = ENDPOINT_UNUSED; 356 struct ath6kl_vif *vif = netdev_priv(dev); 357 u32 map_no = 0; 358 u16 htc_tag = ATH6KL_DATA_PKT_TAG; 359 u8 ac = 99 ; /* initialize to unmapped ac */ 360 bool chk_adhoc_ps_mapping = false; 361 int ret; 362 struct wmi_tx_meta_v2 meta_v2; 363 void *meta; 364 u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed; 365 u8 meta_ver = 0; 366 u32 flags = 0; 367 368 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 369 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__, 370 skb, skb->data, skb->len); 371 372 /* If target is not associated */ 373 if (!test_bit(CONNECTED, &vif->flags)) 374 goto fail_tx; 375 376 if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON)) 377 goto fail_tx; 378 379 if (!test_bit(WMI_READY, &ar->flag)) 380 goto fail_tx; 381 382 /* AP mode Power saving processing */ 383 if (vif->nw_type == AP_NETWORK) { 384 if (ath6kl_powersave_ap(vif, skb, &flags)) 385 return 0; 386 } 387 388 if (test_bit(WMI_ENABLED, &ar->flag)) { 389 if ((dev->features & NETIF_F_IP_CSUM) && 390 (csum == CHECKSUM_PARTIAL)) { 391 csum_start = skb->csum_start - 392 (skb_network_header(skb) - skb->head) + 393 sizeof(struct ath6kl_llc_snap_hdr); 394 csum_dest = skb->csum_offset + csum_start; 395 } 396 397 if (skb_headroom(skb) < dev->needed_headroom) { 398 struct sk_buff *tmp_skb = skb; 399 400 skb = skb_realloc_headroom(skb, dev->needed_headroom); 401 kfree_skb(tmp_skb); 402 if (skb == NULL) { 403 vif->net_stats.tx_dropped++; 404 return 0; 405 } 406 } 407 408 if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) { 409 ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n"); 410 goto fail_tx; 411 } 412 413 if ((dev->features & NETIF_F_IP_CSUM) && 414 (csum == CHECKSUM_PARTIAL)) { 415 meta_v2.csum_start = csum_start; 416 meta_v2.csum_dest = csum_dest; 417 418 /* instruct target to calculate checksum */ 419 meta_v2.csum_flags = WMI_META_V2_FLAG_CSUM_OFFLOAD; 420 meta_ver = WMI_META_VERSION_2; 421 meta = &meta_v2; 422 } else { 423 meta_ver = 0; 424 meta = NULL; 425 } 426 427 ret = ath6kl_wmi_data_hdr_add(ar->wmi, skb, 428 DATA_MSGTYPE, flags, 0, 429 meta_ver, 430 meta, vif->fw_vif_idx); 431 432 if (ret) { 433 ath6kl_warn("failed to add wmi data header:%d\n" 434 , ret); 435 goto fail_tx; 436 } 437 438 if ((vif->nw_type == ADHOC_NETWORK) && 439 ar->ibss_ps_enable && test_bit(CONNECTED, &vif->flags)) 440 chk_adhoc_ps_mapping = true; 441 else { 442 /* get the stream mapping */ 443 ret = ath6kl_wmi_implicit_create_pstream(ar->wmi, 444 vif->fw_vif_idx, skb, 445 0, test_bit(WMM_ENABLED, &vif->flags), &ac); 446 if (ret) 447 goto fail_tx; 448 } 449 } else 450 goto fail_tx; 451 452 spin_lock_bh(&ar->lock); 453 454 if (chk_adhoc_ps_mapping) 455 eid = ath6kl_ibss_map_epid(skb, dev, &map_no); 456 else 457 eid = ar->ac2ep_map[ac]; 458 459 if (eid == 0 || eid == ENDPOINT_UNUSED) { 460 ath6kl_err("eid %d is not mapped!\n", eid); 461 spin_unlock_bh(&ar->lock); 462 goto fail_tx; 463 } 464 465 /* allocate resource for this packet */ 466 cookie = ath6kl_alloc_cookie(ar); 467 468 if (!cookie) { 469 spin_unlock_bh(&ar->lock); 470 goto fail_tx; 471 } 472 473 /* update counts while the lock is held */ 474 ar->tx_pending[eid]++; 475 ar->total_tx_data_pend++; 476 477 spin_unlock_bh(&ar->lock); 478 479 if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) && 480 skb_cloned(skb)) { 481 /* 482 * We will touch (move the buffer data to align it. Since the 483 * skb buffer is cloned and not only the header is changed, we 484 * have to copy it to allow the changes. Since we are copying 485 * the data here, we may as well align it by reserving suitable 486 * headroom to avoid the memmove in ath6kl_htc_tx_buf_align(). 487 */ 488 struct sk_buff *nskb; 489 490 nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC); 491 if (nskb == NULL) 492 goto fail_tx; 493 kfree_skb(skb); 494 skb = nskb; 495 } 496 497 cookie->skb = skb; 498 cookie->map_no = map_no; 499 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 500 eid, htc_tag); 501 cookie->htc_pkt.skb = skb; 502 503 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ", 504 skb->data, skb->len); 505 506 /* 507 * HTC interface is asynchronous, if this fails, cleanup will 508 * happen in the ath6kl_tx_complete callback. 509 */ 510 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 511 512 return 0; 513 514 fail_tx: 515 dev_kfree_skb(skb); 516 517 vif->net_stats.tx_dropped++; 518 vif->net_stats.tx_aborted_errors++; 519 520 return 0; 521 } 522 523 /* indicate tx activity or inactivity on a WMI stream */ 524 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active) 525 { 526 struct ath6kl *ar = devt; 527 enum htc_endpoint_id eid; 528 int i; 529 530 eid = ar->ac2ep_map[traffic_class]; 531 532 if (!test_bit(WMI_ENABLED, &ar->flag)) 533 goto notify_htc; 534 535 spin_lock_bh(&ar->lock); 536 537 ar->ac_stream_active[traffic_class] = active; 538 539 if (active) { 540 /* 541 * Keep track of the active stream with the highest 542 * priority. 543 */ 544 if (ar->ac_stream_pri_map[traffic_class] > 545 ar->hiac_stream_active_pri) 546 /* set the new highest active priority */ 547 ar->hiac_stream_active_pri = 548 ar->ac_stream_pri_map[traffic_class]; 549 550 } else { 551 /* 552 * We may have to search for the next active stream 553 * that is the highest priority. 554 */ 555 if (ar->hiac_stream_active_pri == 556 ar->ac_stream_pri_map[traffic_class]) { 557 /* 558 * The highest priority stream just went inactive 559 * reset and search for the "next" highest "active" 560 * priority stream. 561 */ 562 ar->hiac_stream_active_pri = 0; 563 564 for (i = 0; i < WMM_NUM_AC; i++) { 565 if (ar->ac_stream_active[i] && 566 (ar->ac_stream_pri_map[i] > 567 ar->hiac_stream_active_pri)) 568 /* 569 * Set the new highest active 570 * priority. 571 */ 572 ar->hiac_stream_active_pri = 573 ar->ac_stream_pri_map[i]; 574 } 575 } 576 } 577 578 spin_unlock_bh(&ar->lock); 579 580 notify_htc: 581 /* notify HTC, this may cause credit distribution changes */ 582 ath6kl_htc_activity_changed(ar->htc_target, eid, active); 583 } 584 585 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target, 586 struct htc_packet *packet) 587 { 588 struct ath6kl *ar = target->dev->ar; 589 struct ath6kl_vif *vif; 590 enum htc_endpoint_id endpoint = packet->endpoint; 591 enum htc_send_full_action action = HTC_SEND_FULL_KEEP; 592 593 if (endpoint == ar->ctrl_ep) { 594 /* 595 * Under normal WMI if this is getting full, then something 596 * is running rampant the host should not be exhausting the 597 * WMI queue with too many commands the only exception to 598 * this is during testing using endpointping. 599 */ 600 set_bit(WMI_CTRL_EP_FULL, &ar->flag); 601 ath6kl_err("wmi ctrl ep is full\n"); 602 ath6kl_recovery_err_notify(ar, ATH6KL_FW_EP_FULL); 603 return action; 604 } 605 606 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG) 607 return action; 608 609 /* 610 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for 611 * the highest active stream. 612 */ 613 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] < 614 ar->hiac_stream_active_pri && 615 ar->cookie_count <= 616 target->endpoint[endpoint].tx_drop_packet_threshold) 617 /* 618 * Give preference to the highest priority stream by 619 * dropping the packets which overflowed. 620 */ 621 action = HTC_SEND_FULL_DROP; 622 623 /* FIXME: Locking */ 624 spin_lock_bh(&ar->list_lock); 625 list_for_each_entry(vif, &ar->vif_list, list) { 626 if (vif->nw_type == ADHOC_NETWORK || 627 action != HTC_SEND_FULL_DROP) { 628 spin_unlock_bh(&ar->list_lock); 629 630 set_bit(NETQ_STOPPED, &vif->flags); 631 netif_stop_queue(vif->ndev); 632 633 return action; 634 } 635 } 636 spin_unlock_bh(&ar->list_lock); 637 638 return action; 639 } 640 641 /* TODO this needs to be looked at */ 642 static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif, 643 enum htc_endpoint_id eid, u32 map_no) 644 { 645 struct ath6kl *ar = vif->ar; 646 u32 i; 647 648 if (vif->nw_type != ADHOC_NETWORK) 649 return; 650 651 if (!ar->ibss_ps_enable) 652 return; 653 654 if (eid == ar->ctrl_ep) 655 return; 656 657 if (map_no == 0) 658 return; 659 660 map_no--; 661 ar->node_map[map_no].tx_pend--; 662 663 if (ar->node_map[map_no].tx_pend) 664 return; 665 666 if (map_no != (ar->node_num - 1)) 667 return; 668 669 for (i = ar->node_num; i > 0; i--) { 670 if (ar->node_map[i - 1].tx_pend) 671 break; 672 673 memset(&ar->node_map[i - 1], 0, 674 sizeof(struct ath6kl_node_mapping)); 675 ar->node_num--; 676 } 677 } 678 679 void ath6kl_tx_complete(struct htc_target *target, 680 struct list_head *packet_queue) 681 { 682 struct ath6kl *ar = target->dev->ar; 683 struct sk_buff_head skb_queue; 684 struct htc_packet *packet; 685 struct sk_buff *skb; 686 struct ath6kl_cookie *ath6kl_cookie; 687 u32 map_no = 0; 688 int status; 689 enum htc_endpoint_id eid; 690 bool wake_event = false; 691 bool flushing[ATH6KL_VIF_MAX] = {false}; 692 u8 if_idx; 693 struct ath6kl_vif *vif; 694 695 skb_queue_head_init(&skb_queue); 696 697 /* lock the driver as we update internal state */ 698 spin_lock_bh(&ar->lock); 699 700 /* reap completed packets */ 701 while (!list_empty(packet_queue)) { 702 703 packet = list_first_entry(packet_queue, struct htc_packet, 704 list); 705 list_del(&packet->list); 706 707 if (WARN_ON_ONCE(packet->endpoint == ENDPOINT_UNUSED || 708 packet->endpoint >= ENDPOINT_MAX)) 709 continue; 710 711 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt; 712 if (WARN_ON_ONCE(!ath6kl_cookie)) 713 continue; 714 715 status = packet->status; 716 skb = ath6kl_cookie->skb; 717 eid = packet->endpoint; 718 map_no = ath6kl_cookie->map_no; 719 720 if (WARN_ON_ONCE(!skb || !skb->data)) { 721 dev_kfree_skb(skb); 722 ath6kl_free_cookie(ar, ath6kl_cookie); 723 continue; 724 } 725 726 __skb_queue_tail(&skb_queue, skb); 727 728 if (WARN_ON_ONCE(!status && (packet->act_len != skb->len))) { 729 ath6kl_free_cookie(ar, ath6kl_cookie); 730 continue; 731 } 732 733 ar->tx_pending[eid]--; 734 735 if (eid != ar->ctrl_ep) 736 ar->total_tx_data_pend--; 737 738 if (eid == ar->ctrl_ep) { 739 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag)) 740 clear_bit(WMI_CTRL_EP_FULL, &ar->flag); 741 742 if (ar->tx_pending[eid] == 0) 743 wake_event = true; 744 } 745 746 if (eid == ar->ctrl_ep) { 747 if_idx = wmi_cmd_hdr_get_if_idx( 748 (struct wmi_cmd_hdr *) packet->buf); 749 } else { 750 if_idx = wmi_data_hdr_get_if_idx( 751 (struct wmi_data_hdr *) packet->buf); 752 } 753 754 vif = ath6kl_get_vif_by_index(ar, if_idx); 755 if (!vif) { 756 ath6kl_free_cookie(ar, ath6kl_cookie); 757 continue; 758 } 759 760 if (status) { 761 if (status == -ECANCELED) 762 /* a packet was flushed */ 763 flushing[if_idx] = true; 764 765 vif->net_stats.tx_errors++; 766 767 if (status != -ENOSPC && status != -ECANCELED) 768 ath6kl_warn("tx complete error: %d\n", status); 769 770 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 771 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 772 __func__, skb, packet->buf, packet->act_len, 773 eid, "error!"); 774 } else { 775 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 776 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 777 __func__, skb, packet->buf, packet->act_len, 778 eid, "OK"); 779 780 flushing[if_idx] = false; 781 vif->net_stats.tx_packets++; 782 vif->net_stats.tx_bytes += skb->len; 783 } 784 785 ath6kl_tx_clear_node_map(vif, eid, map_no); 786 787 ath6kl_free_cookie(ar, ath6kl_cookie); 788 789 if (test_bit(NETQ_STOPPED, &vif->flags)) 790 clear_bit(NETQ_STOPPED, &vif->flags); 791 } 792 793 spin_unlock_bh(&ar->lock); 794 795 __skb_queue_purge(&skb_queue); 796 797 /* FIXME: Locking */ 798 spin_lock_bh(&ar->list_lock); 799 list_for_each_entry(vif, &ar->vif_list, list) { 800 if (test_bit(CONNECTED, &vif->flags) && 801 !flushing[vif->fw_vif_idx]) { 802 spin_unlock_bh(&ar->list_lock); 803 netif_wake_queue(vif->ndev); 804 spin_lock_bh(&ar->list_lock); 805 } 806 } 807 spin_unlock_bh(&ar->list_lock); 808 809 if (wake_event) 810 wake_up(&ar->event_wq); 811 812 return; 813 } 814 815 void ath6kl_tx_data_cleanup(struct ath6kl *ar) 816 { 817 int i; 818 819 /* flush all the data (non-control) streams */ 820 for (i = 0; i < WMM_NUM_AC; i++) 821 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i], 822 ATH6KL_DATA_PKT_TAG); 823 } 824 825 /* Rx functions */ 826 827 static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev, 828 struct sk_buff *skb) 829 { 830 if (!skb) 831 return; 832 833 skb->dev = dev; 834 835 if (!(skb->dev->flags & IFF_UP)) { 836 dev_kfree_skb(skb); 837 return; 838 } 839 840 skb->protocol = eth_type_trans(skb, skb->dev); 841 842 netif_rx_ni(skb); 843 } 844 845 static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num) 846 { 847 struct sk_buff *skb; 848 849 while (num) { 850 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 851 if (!skb) { 852 ath6kl_err("netbuf allocation failed\n"); 853 return; 854 } 855 skb_queue_tail(q, skb); 856 num--; 857 } 858 } 859 860 static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr) 861 { 862 struct sk_buff *skb = NULL; 863 864 if (skb_queue_len(&p_aggr->rx_amsdu_freeq) < 865 (AGGR_NUM_OF_FREE_NETBUFS >> 2)) 866 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, 867 AGGR_NUM_OF_FREE_NETBUFS); 868 869 skb = skb_dequeue(&p_aggr->rx_amsdu_freeq); 870 871 return skb; 872 } 873 874 void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint) 875 { 876 struct ath6kl *ar = target->dev->ar; 877 struct sk_buff *skb; 878 int rx_buf; 879 int n_buf_refill; 880 struct htc_packet *packet; 881 struct list_head queue; 882 883 n_buf_refill = ATH6KL_MAX_RX_BUFFERS - 884 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint); 885 886 if (n_buf_refill <= 0) 887 return; 888 889 INIT_LIST_HEAD(&queue); 890 891 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 892 "%s: providing htc with %d buffers at eid=%d\n", 893 __func__, n_buf_refill, endpoint); 894 895 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) { 896 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 897 if (!skb) 898 break; 899 900 packet = (struct htc_packet *) skb->head; 901 if (!IS_ALIGNED((unsigned long) skb->data, 4)) { 902 size_t len = skb_headlen(skb); 903 skb->data = PTR_ALIGN(skb->data - 4, 4); 904 skb_set_tail_pointer(skb, len); 905 } 906 set_htc_rxpkt_info(packet, skb, skb->data, 907 ATH6KL_BUFFER_SIZE, endpoint); 908 packet->skb = skb; 909 list_add_tail(&packet->list, &queue); 910 } 911 912 if (!list_empty(&queue)) 913 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue); 914 } 915 916 void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count) 917 { 918 struct htc_packet *packet; 919 struct sk_buff *skb; 920 921 while (count) { 922 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE); 923 if (!skb) 924 return; 925 926 packet = (struct htc_packet *) skb->head; 927 if (!IS_ALIGNED((unsigned long) skb->data, 4)) { 928 size_t len = skb_headlen(skb); 929 skb->data = PTR_ALIGN(skb->data - 4, 4); 930 skb_set_tail_pointer(skb, len); 931 } 932 set_htc_rxpkt_info(packet, skb, skb->data, 933 ATH6KL_AMSDU_BUFFER_SIZE, 0); 934 packet->skb = skb; 935 936 spin_lock_bh(&ar->lock); 937 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue); 938 spin_unlock_bh(&ar->lock); 939 count--; 940 } 941 } 942 943 /* 944 * Callback to allocate a receive buffer for a pending packet. We use a 945 * pre-allocated list of buffers of maximum AMSDU size (4K). 946 */ 947 struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target, 948 enum htc_endpoint_id endpoint, 949 int len) 950 { 951 struct ath6kl *ar = target->dev->ar; 952 struct htc_packet *packet = NULL; 953 struct list_head *pkt_pos; 954 int refill_cnt = 0, depth = 0; 955 956 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n", 957 __func__, endpoint, len); 958 959 if ((len <= ATH6KL_BUFFER_SIZE) || 960 (len > ATH6KL_AMSDU_BUFFER_SIZE)) 961 return NULL; 962 963 spin_lock_bh(&ar->lock); 964 965 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 966 spin_unlock_bh(&ar->lock); 967 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS; 968 goto refill_buf; 969 } 970 971 packet = list_first_entry(&ar->amsdu_rx_buffer_queue, 972 struct htc_packet, list); 973 list_del(&packet->list); 974 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue) 975 depth++; 976 977 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth; 978 spin_unlock_bh(&ar->lock); 979 980 /* set actual endpoint ID */ 981 packet->endpoint = endpoint; 982 983 refill_buf: 984 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD) 985 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt); 986 987 return packet; 988 } 989 990 static void aggr_slice_amsdu(struct aggr_info *p_aggr, 991 struct rxtid *rxtid, struct sk_buff *skb) 992 { 993 struct sk_buff *new_skb; 994 struct ethhdr *hdr; 995 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len; 996 u8 *framep; 997 998 mac_hdr_len = sizeof(struct ethhdr); 999 framep = skb->data + mac_hdr_len; 1000 amsdu_len = skb->len - mac_hdr_len; 1001 1002 while (amsdu_len > mac_hdr_len) { 1003 hdr = (struct ethhdr *) framep; 1004 payload_8023_len = ntohs(hdr->h_proto); 1005 1006 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN || 1007 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) { 1008 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n", 1009 payload_8023_len); 1010 break; 1011 } 1012 1013 frame_8023_len = payload_8023_len + mac_hdr_len; 1014 new_skb = aggr_get_free_skb(p_aggr); 1015 if (!new_skb) { 1016 ath6kl_err("no buffer available\n"); 1017 break; 1018 } 1019 1020 memcpy(new_skb->data, framep, frame_8023_len); 1021 skb_put(new_skb, frame_8023_len); 1022 if (ath6kl_wmi_dot3_2_dix(new_skb)) { 1023 ath6kl_err("dot3_2_dix error\n"); 1024 dev_kfree_skb(new_skb); 1025 break; 1026 } 1027 1028 skb_queue_tail(&rxtid->q, new_skb); 1029 1030 /* Is this the last subframe within this aggregate ? */ 1031 if ((amsdu_len - frame_8023_len) == 0) 1032 break; 1033 1034 /* Add the length of A-MSDU subframe padding bytes - 1035 * Round to nearest word. 1036 */ 1037 frame_8023_len = ALIGN(frame_8023_len, 4); 1038 1039 framep += frame_8023_len; 1040 amsdu_len -= frame_8023_len; 1041 } 1042 1043 dev_kfree_skb(skb); 1044 } 1045 1046 static void aggr_deque_frms(struct aggr_info_conn *agg_conn, u8 tid, 1047 u16 seq_no, u8 order) 1048 { 1049 struct sk_buff *skb; 1050 struct rxtid *rxtid; 1051 struct skb_hold_q *node; 1052 u16 idx, idx_end, seq_end; 1053 struct rxtid_stats *stats; 1054 1055 rxtid = &agg_conn->rx_tid[tid]; 1056 stats = &agg_conn->stat[tid]; 1057 1058 spin_lock_bh(&rxtid->lock); 1059 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1060 1061 /* 1062 * idx_end is typically the last possible frame in the window, 1063 * but changes to 'the' seq_no, when BAR comes. If seq_no 1064 * is non-zero, we will go up to that and stop. 1065 * Note: last seq no in current window will occupy the same 1066 * index position as index that is just previous to start. 1067 * An imp point : if win_sz is 7, for seq_no space of 4095, 1068 * then, there would be holes when sequence wrap around occurs. 1069 * Target should judiciously choose the win_sz, based on 1070 * this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz 1071 * 2, 4, 8, 16 win_sz works fine). 1072 * We must deque from "idx" to "idx_end", including both. 1073 */ 1074 seq_end = seq_no ? seq_no : rxtid->seq_next; 1075 idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz); 1076 1077 do { 1078 node = &rxtid->hold_q[idx]; 1079 if ((order == 1) && (!node->skb)) 1080 break; 1081 1082 if (node->skb) { 1083 if (node->is_amsdu) 1084 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, 1085 node->skb); 1086 else 1087 skb_queue_tail(&rxtid->q, node->skb); 1088 node->skb = NULL; 1089 } else 1090 stats->num_hole++; 1091 1092 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next); 1093 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1094 } while (idx != idx_end); 1095 1096 spin_unlock_bh(&rxtid->lock); 1097 1098 stats->num_delivered += skb_queue_len(&rxtid->q); 1099 1100 while ((skb = skb_dequeue(&rxtid->q))) 1101 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, skb); 1102 } 1103 1104 static bool aggr_process_recv_frm(struct aggr_info_conn *agg_conn, u8 tid, 1105 u16 seq_no, 1106 bool is_amsdu, struct sk_buff *frame) 1107 { 1108 struct rxtid *rxtid; 1109 struct rxtid_stats *stats; 1110 struct sk_buff *skb; 1111 struct skb_hold_q *node; 1112 u16 idx, st, cur, end; 1113 bool is_queued = false; 1114 u16 extended_end; 1115 1116 rxtid = &agg_conn->rx_tid[tid]; 1117 stats = &agg_conn->stat[tid]; 1118 1119 stats->num_into_aggr++; 1120 1121 if (!rxtid->aggr) { 1122 if (is_amsdu) { 1123 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, frame); 1124 is_queued = true; 1125 stats->num_amsdu++; 1126 while ((skb = skb_dequeue(&rxtid->q))) 1127 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, 1128 skb); 1129 } 1130 return is_queued; 1131 } 1132 1133 /* Check the incoming sequence no, if it's in the window */ 1134 st = rxtid->seq_next; 1135 cur = seq_no; 1136 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO; 1137 1138 if (((st < end) && (cur < st || cur > end)) || 1139 ((st > end) && (cur > end) && (cur < st))) { 1140 extended_end = (end + rxtid->hold_q_sz - 1) & 1141 ATH6KL_MAX_SEQ_NO; 1142 1143 if (((end < extended_end) && 1144 (cur < end || cur > extended_end)) || 1145 ((end > extended_end) && (cur > extended_end) && 1146 (cur < end))) { 1147 aggr_deque_frms(agg_conn, tid, 0, 0); 1148 spin_lock_bh(&rxtid->lock); 1149 if (cur >= rxtid->hold_q_sz - 1) 1150 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1); 1151 else 1152 rxtid->seq_next = ATH6KL_MAX_SEQ_NO - 1153 (rxtid->hold_q_sz - 2 - cur); 1154 spin_unlock_bh(&rxtid->lock); 1155 } else { 1156 /* 1157 * Dequeue only those frames that are outside the 1158 * new shifted window. 1159 */ 1160 if (cur >= rxtid->hold_q_sz - 1) 1161 st = cur - (rxtid->hold_q_sz - 1); 1162 else 1163 st = ATH6KL_MAX_SEQ_NO - 1164 (rxtid->hold_q_sz - 2 - cur); 1165 1166 aggr_deque_frms(agg_conn, tid, st, 0); 1167 } 1168 1169 stats->num_oow++; 1170 } 1171 1172 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz); 1173 1174 node = &rxtid->hold_q[idx]; 1175 1176 spin_lock_bh(&rxtid->lock); 1177 1178 /* 1179 * Is the cur frame duplicate or something beyond our window(hold_q 1180 * -> which is 2x, already)? 1181 * 1182 * 1. Duplicate is easy - drop incoming frame. 1183 * 2. Not falling in current sliding window. 1184 * 2a. is the frame_seq_no preceding current tid_seq_no? 1185 * -> drop the frame. perhaps sender did not get our ACK. 1186 * this is taken care of above. 1187 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ); 1188 * -> Taken care of it above, by moving window forward. 1189 */ 1190 dev_kfree_skb(node->skb); 1191 stats->num_dups++; 1192 1193 node->skb = frame; 1194 is_queued = true; 1195 node->is_amsdu = is_amsdu; 1196 node->seq_no = seq_no; 1197 1198 if (node->is_amsdu) 1199 stats->num_amsdu++; 1200 else 1201 stats->num_mpdu++; 1202 1203 spin_unlock_bh(&rxtid->lock); 1204 1205 aggr_deque_frms(agg_conn, tid, 0, 1); 1206 1207 if (agg_conn->timer_scheduled) 1208 return is_queued; 1209 1210 spin_lock_bh(&rxtid->lock); 1211 for (idx = 0 ; idx < rxtid->hold_q_sz; idx++) { 1212 if (rxtid->hold_q[idx].skb) { 1213 /* 1214 * There is a frame in the queue and no 1215 * timer so start a timer to ensure that 1216 * the frame doesn't remain stuck 1217 * forever. 1218 */ 1219 agg_conn->timer_scheduled = true; 1220 mod_timer(&agg_conn->timer, 1221 (jiffies + (HZ * AGGR_RX_TIMEOUT) / 1000)); 1222 rxtid->timer_mon = true; 1223 break; 1224 } 1225 } 1226 spin_unlock_bh(&rxtid->lock); 1227 1228 return is_queued; 1229 } 1230 1231 static void ath6kl_uapsd_trigger_frame_rx(struct ath6kl_vif *vif, 1232 struct ath6kl_sta *conn) 1233 { 1234 struct ath6kl *ar = vif->ar; 1235 bool is_apsdq_empty, is_apsdq_empty_at_start; 1236 u32 num_frames_to_deliver, flags; 1237 struct sk_buff *skb = NULL; 1238 1239 /* 1240 * If the APSD q for this STA is not empty, dequeue and 1241 * send a pkt from the head of the q. Also update the 1242 * More data bit in the WMI_DATA_HDR if there are 1243 * more pkts for this STA in the APSD q. 1244 * If there are no more pkts for this STA, 1245 * update the APSD bitmap for this STA. 1246 */ 1247 1248 num_frames_to_deliver = (conn->apsd_info >> ATH6KL_APSD_NUM_OF_AC) & 1249 ATH6KL_APSD_FRAME_MASK; 1250 /* 1251 * Number of frames to send in a service period is 1252 * indicated by the station 1253 * in the QOS_INFO of the association request 1254 * If it is zero, send all frames 1255 */ 1256 if (!num_frames_to_deliver) 1257 num_frames_to_deliver = ATH6KL_APSD_ALL_FRAME; 1258 1259 spin_lock_bh(&conn->psq_lock); 1260 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1261 spin_unlock_bh(&conn->psq_lock); 1262 is_apsdq_empty_at_start = is_apsdq_empty; 1263 1264 while ((!is_apsdq_empty) && (num_frames_to_deliver)) { 1265 1266 spin_lock_bh(&conn->psq_lock); 1267 skb = skb_dequeue(&conn->apsdq); 1268 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1269 spin_unlock_bh(&conn->psq_lock); 1270 1271 /* 1272 * Set the STA flag to Trigger delivery, 1273 * so that the frame will go out 1274 */ 1275 conn->sta_flags |= STA_PS_APSD_TRIGGER; 1276 num_frames_to_deliver--; 1277 1278 /* Last frame in the service period, set EOSP or queue empty */ 1279 if ((is_apsdq_empty) || (!num_frames_to_deliver)) 1280 conn->sta_flags |= STA_PS_APSD_EOSP; 1281 1282 ath6kl_data_tx(skb, vif->ndev); 1283 conn->sta_flags &= ~(STA_PS_APSD_TRIGGER); 1284 conn->sta_flags &= ~(STA_PS_APSD_EOSP); 1285 } 1286 1287 if (is_apsdq_empty) { 1288 if (is_apsdq_empty_at_start) 1289 flags = WMI_AP_APSD_NO_DELIVERY_FRAMES; 1290 else 1291 flags = 0; 1292 1293 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 1294 vif->fw_vif_idx, 1295 conn->aid, 0, flags); 1296 } 1297 1298 return; 1299 } 1300 1301 void ath6kl_rx(struct htc_target *target, struct htc_packet *packet) 1302 { 1303 struct ath6kl *ar = target->dev->ar; 1304 struct sk_buff *skb = packet->pkt_cntxt; 1305 struct wmi_rx_meta_v2 *meta; 1306 struct wmi_data_hdr *dhdr; 1307 int min_hdr_len; 1308 u8 meta_type, dot11_hdr = 0; 1309 u8 pad_before_data_start; 1310 int status = packet->status; 1311 enum htc_endpoint_id ept = packet->endpoint; 1312 bool is_amsdu, prev_ps, ps_state = false; 1313 bool trig_state = false; 1314 struct ath6kl_sta *conn = NULL; 1315 struct sk_buff *skb1 = NULL; 1316 struct ethhdr *datap = NULL; 1317 struct ath6kl_vif *vif; 1318 struct aggr_info_conn *aggr_conn; 1319 u16 seq_no, offset; 1320 u8 tid, if_idx; 1321 1322 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 1323 "%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d", 1324 __func__, ar, ept, skb, packet->buf, 1325 packet->act_len, status); 1326 1327 if (status || !(skb->data + HTC_HDR_LENGTH)) { 1328 dev_kfree_skb(skb); 1329 return; 1330 } 1331 1332 skb_put(skb, packet->act_len + HTC_HDR_LENGTH); 1333 skb_pull(skb, HTC_HDR_LENGTH); 1334 1335 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "rx ", 1336 skb->data, skb->len); 1337 1338 if (ept == ar->ctrl_ep) { 1339 if (test_bit(WMI_ENABLED, &ar->flag)) { 1340 ath6kl_check_wow_status(ar); 1341 ath6kl_wmi_control_rx(ar->wmi, skb); 1342 return; 1343 } 1344 if_idx = 1345 wmi_cmd_hdr_get_if_idx((struct wmi_cmd_hdr *) skb->data); 1346 } else { 1347 if_idx = 1348 wmi_data_hdr_get_if_idx((struct wmi_data_hdr *) skb->data); 1349 } 1350 1351 vif = ath6kl_get_vif_by_index(ar, if_idx); 1352 if (!vif) { 1353 dev_kfree_skb(skb); 1354 return; 1355 } 1356 1357 /* 1358 * Take lock to protect buffer counts and adaptive power throughput 1359 * state. 1360 */ 1361 spin_lock_bh(&vif->if_lock); 1362 1363 vif->net_stats.rx_packets++; 1364 vif->net_stats.rx_bytes += packet->act_len; 1365 1366 spin_unlock_bh(&vif->if_lock); 1367 1368 skb->dev = vif->ndev; 1369 1370 if (!test_bit(WMI_ENABLED, &ar->flag)) { 1371 if (EPPING_ALIGNMENT_PAD > 0) 1372 skb_pull(skb, EPPING_ALIGNMENT_PAD); 1373 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1374 return; 1375 } 1376 1377 ath6kl_check_wow_status(ar); 1378 1379 min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) + 1380 sizeof(struct ath6kl_llc_snap_hdr); 1381 1382 dhdr = (struct wmi_data_hdr *) skb->data; 1383 1384 /* 1385 * In the case of AP mode we may receive NULL data frames 1386 * that do not have LLC hdr. They are 16 bytes in size. 1387 * Allow these frames in the AP mode. 1388 */ 1389 if (vif->nw_type != AP_NETWORK && 1390 ((packet->act_len < min_hdr_len) || 1391 (packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) { 1392 ath6kl_info("frame len is too short or too long\n"); 1393 vif->net_stats.rx_errors++; 1394 vif->net_stats.rx_length_errors++; 1395 dev_kfree_skb(skb); 1396 return; 1397 } 1398 1399 /* Get the Power save state of the STA */ 1400 if (vif->nw_type == AP_NETWORK) { 1401 meta_type = wmi_data_hdr_get_meta(dhdr); 1402 1403 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) & 1404 WMI_DATA_HDR_PS_MASK); 1405 1406 offset = sizeof(struct wmi_data_hdr); 1407 trig_state = !!(le16_to_cpu(dhdr->info3) & WMI_DATA_HDR_TRIG); 1408 1409 switch (meta_type) { 1410 case 0: 1411 break; 1412 case WMI_META_VERSION_1: 1413 offset += sizeof(struct wmi_rx_meta_v1); 1414 break; 1415 case WMI_META_VERSION_2: 1416 offset += sizeof(struct wmi_rx_meta_v2); 1417 break; 1418 default: 1419 break; 1420 } 1421 1422 datap = (struct ethhdr *) (skb->data + offset); 1423 conn = ath6kl_find_sta(vif, datap->h_source); 1424 1425 if (!conn) { 1426 dev_kfree_skb(skb); 1427 return; 1428 } 1429 1430 /* 1431 * If there is a change in PS state of the STA, 1432 * take appropriate steps: 1433 * 1434 * 1. If Sleep-->Awake, flush the psq for the STA 1435 * Clear the PVB for the STA. 1436 * 2. If Awake-->Sleep, Starting queueing frames 1437 * the STA. 1438 */ 1439 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP); 1440 1441 if (ps_state) 1442 conn->sta_flags |= STA_PS_SLEEP; 1443 else 1444 conn->sta_flags &= ~STA_PS_SLEEP; 1445 1446 /* Accept trigger only when the station is in sleep */ 1447 if ((conn->sta_flags & STA_PS_SLEEP) && trig_state) 1448 ath6kl_uapsd_trigger_frame_rx(vif, conn); 1449 1450 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) { 1451 if (!(conn->sta_flags & STA_PS_SLEEP)) { 1452 struct sk_buff *skbuff = NULL; 1453 bool is_apsdq_empty; 1454 struct ath6kl_mgmt_buff *mgmt; 1455 u8 idx; 1456 1457 spin_lock_bh(&conn->psq_lock); 1458 while (conn->mgmt_psq_len > 0) { 1459 mgmt = list_first_entry( 1460 &conn->mgmt_psq, 1461 struct ath6kl_mgmt_buff, 1462 list); 1463 list_del(&mgmt->list); 1464 conn->mgmt_psq_len--; 1465 spin_unlock_bh(&conn->psq_lock); 1466 idx = vif->fw_vif_idx; 1467 1468 ath6kl_wmi_send_mgmt_cmd(ar->wmi, 1469 idx, 1470 mgmt->id, 1471 mgmt->freq, 1472 mgmt->wait, 1473 mgmt->buf, 1474 mgmt->len, 1475 mgmt->no_cck); 1476 1477 kfree(mgmt); 1478 spin_lock_bh(&conn->psq_lock); 1479 } 1480 conn->mgmt_psq_len = 0; 1481 while ((skbuff = skb_dequeue(&conn->psq))) { 1482 spin_unlock_bh(&conn->psq_lock); 1483 ath6kl_data_tx(skbuff, vif->ndev); 1484 spin_lock_bh(&conn->psq_lock); 1485 } 1486 1487 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1488 while ((skbuff = skb_dequeue(&conn->apsdq))) { 1489 spin_unlock_bh(&conn->psq_lock); 1490 ath6kl_data_tx(skbuff, vif->ndev); 1491 spin_lock_bh(&conn->psq_lock); 1492 } 1493 spin_unlock_bh(&conn->psq_lock); 1494 1495 if (!is_apsdq_empty) 1496 ath6kl_wmi_set_apsd_bfrd_traf( 1497 ar->wmi, 1498 vif->fw_vif_idx, 1499 conn->aid, 0, 0); 1500 1501 /* Clear the PVB for this STA */ 1502 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, 1503 conn->aid, 0); 1504 } 1505 } 1506 1507 /* drop NULL data frames here */ 1508 if ((packet->act_len < min_hdr_len) || 1509 (packet->act_len > 1510 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) { 1511 dev_kfree_skb(skb); 1512 return; 1513 } 1514 } 1515 1516 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false; 1517 tid = wmi_data_hdr_get_up(dhdr); 1518 seq_no = wmi_data_hdr_get_seqno(dhdr); 1519 meta_type = wmi_data_hdr_get_meta(dhdr); 1520 dot11_hdr = wmi_data_hdr_get_dot11(dhdr); 1521 pad_before_data_start = 1522 (le16_to_cpu(dhdr->info3) >> WMI_DATA_HDR_PAD_BEFORE_DATA_SHIFT) 1523 & WMI_DATA_HDR_PAD_BEFORE_DATA_MASK; 1524 1525 skb_pull(skb, sizeof(struct wmi_data_hdr)); 1526 1527 switch (meta_type) { 1528 case WMI_META_VERSION_1: 1529 skb_pull(skb, sizeof(struct wmi_rx_meta_v1)); 1530 break; 1531 case WMI_META_VERSION_2: 1532 meta = (struct wmi_rx_meta_v2 *) skb->data; 1533 if (meta->csum_flags & 0x1) { 1534 skb->ip_summed = CHECKSUM_COMPLETE; 1535 skb->csum = (__force __wsum) meta->csum; 1536 } 1537 skb_pull(skb, sizeof(struct wmi_rx_meta_v2)); 1538 break; 1539 default: 1540 break; 1541 } 1542 1543 skb_pull(skb, pad_before_data_start); 1544 1545 if (dot11_hdr) 1546 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb); 1547 else if (!is_amsdu) 1548 status = ath6kl_wmi_dot3_2_dix(skb); 1549 1550 if (status) { 1551 /* 1552 * Drop frames that could not be processed (lack of 1553 * memory, etc.) 1554 */ 1555 dev_kfree_skb(skb); 1556 return; 1557 } 1558 1559 if (!(vif->ndev->flags & IFF_UP)) { 1560 dev_kfree_skb(skb); 1561 return; 1562 } 1563 1564 if (vif->nw_type == AP_NETWORK) { 1565 datap = (struct ethhdr *) skb->data; 1566 if (is_multicast_ether_addr(datap->h_dest)) 1567 /* 1568 * Bcast/Mcast frames should be sent to the 1569 * OS stack as well as on the air. 1570 */ 1571 skb1 = skb_copy(skb, GFP_ATOMIC); 1572 else { 1573 /* 1574 * Search for a connected STA with dstMac 1575 * as the Mac address. If found send the 1576 * frame to it on the air else send the 1577 * frame up the stack. 1578 */ 1579 conn = ath6kl_find_sta(vif, datap->h_dest); 1580 1581 if (conn && ar->intra_bss) { 1582 skb1 = skb; 1583 skb = NULL; 1584 } else if (conn && !ar->intra_bss) { 1585 dev_kfree_skb(skb); 1586 skb = NULL; 1587 } 1588 } 1589 if (skb1) 1590 ath6kl_data_tx(skb1, vif->ndev); 1591 1592 if (skb == NULL) { 1593 /* nothing to deliver up the stack */ 1594 return; 1595 } 1596 } 1597 1598 datap = (struct ethhdr *) skb->data; 1599 1600 if (is_unicast_ether_addr(datap->h_dest)) { 1601 if (vif->nw_type == AP_NETWORK) { 1602 conn = ath6kl_find_sta(vif, datap->h_source); 1603 if (!conn) 1604 return; 1605 aggr_conn = conn->aggr_conn; 1606 } else 1607 aggr_conn = vif->aggr_cntxt->aggr_conn; 1608 1609 if (aggr_process_recv_frm(aggr_conn, tid, seq_no, 1610 is_amsdu, skb)) { 1611 /* aggregation code will handle the skb */ 1612 return; 1613 } 1614 } else if (!is_broadcast_ether_addr(datap->h_dest)) 1615 vif->net_stats.multicast++; 1616 1617 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1618 } 1619 1620 static void aggr_timeout(unsigned long arg) 1621 { 1622 u8 i, j; 1623 struct aggr_info_conn *aggr_conn = (struct aggr_info_conn *) arg; 1624 struct rxtid *rxtid; 1625 struct rxtid_stats *stats; 1626 1627 for (i = 0; i < NUM_OF_TIDS; i++) { 1628 rxtid = &aggr_conn->rx_tid[i]; 1629 stats = &aggr_conn->stat[i]; 1630 1631 if (!rxtid->aggr || !rxtid->timer_mon) 1632 continue; 1633 1634 stats->num_timeouts++; 1635 ath6kl_dbg(ATH6KL_DBG_AGGR, 1636 "aggr timeout (st %d end %d)\n", 1637 rxtid->seq_next, 1638 ((rxtid->seq_next + rxtid->hold_q_sz-1) & 1639 ATH6KL_MAX_SEQ_NO)); 1640 aggr_deque_frms(aggr_conn, i, 0, 0); 1641 } 1642 1643 aggr_conn->timer_scheduled = false; 1644 1645 for (i = 0; i < NUM_OF_TIDS; i++) { 1646 rxtid = &aggr_conn->rx_tid[i]; 1647 1648 if (rxtid->aggr && rxtid->hold_q) { 1649 spin_lock_bh(&rxtid->lock); 1650 for (j = 0; j < rxtid->hold_q_sz; j++) { 1651 if (rxtid->hold_q[j].skb) { 1652 aggr_conn->timer_scheduled = true; 1653 rxtid->timer_mon = true; 1654 break; 1655 } 1656 } 1657 spin_unlock_bh(&rxtid->lock); 1658 1659 if (j >= rxtid->hold_q_sz) 1660 rxtid->timer_mon = false; 1661 } 1662 } 1663 1664 if (aggr_conn->timer_scheduled) 1665 mod_timer(&aggr_conn->timer, 1666 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT)); 1667 } 1668 1669 static void aggr_delete_tid_state(struct aggr_info_conn *aggr_conn, u8 tid) 1670 { 1671 struct rxtid *rxtid; 1672 struct rxtid_stats *stats; 1673 1674 if (!aggr_conn || tid >= NUM_OF_TIDS) 1675 return; 1676 1677 rxtid = &aggr_conn->rx_tid[tid]; 1678 stats = &aggr_conn->stat[tid]; 1679 1680 if (rxtid->aggr) 1681 aggr_deque_frms(aggr_conn, tid, 0, 0); 1682 1683 rxtid->aggr = false; 1684 rxtid->timer_mon = false; 1685 rxtid->win_sz = 0; 1686 rxtid->seq_next = 0; 1687 rxtid->hold_q_sz = 0; 1688 1689 kfree(rxtid->hold_q); 1690 rxtid->hold_q = NULL; 1691 1692 memset(stats, 0, sizeof(struct rxtid_stats)); 1693 } 1694 1695 void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid_mux, u16 seq_no, 1696 u8 win_sz) 1697 { 1698 struct ath6kl_sta *sta; 1699 struct aggr_info_conn *aggr_conn = NULL; 1700 struct rxtid *rxtid; 1701 struct rxtid_stats *stats; 1702 u16 hold_q_size; 1703 u8 tid, aid; 1704 1705 if (vif->nw_type == AP_NETWORK) { 1706 aid = ath6kl_get_aid(tid_mux); 1707 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1708 if (sta) 1709 aggr_conn = sta->aggr_conn; 1710 } else 1711 aggr_conn = vif->aggr_cntxt->aggr_conn; 1712 1713 if (!aggr_conn) 1714 return; 1715 1716 tid = ath6kl_get_tid(tid_mux); 1717 if (tid >= NUM_OF_TIDS) 1718 return; 1719 1720 rxtid = &aggr_conn->rx_tid[tid]; 1721 stats = &aggr_conn->stat[tid]; 1722 1723 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX) 1724 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n", 1725 __func__, win_sz, tid); 1726 1727 if (rxtid->aggr) 1728 aggr_delete_tid_state(aggr_conn, tid); 1729 1730 rxtid->seq_next = seq_no; 1731 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q); 1732 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL); 1733 if (!rxtid->hold_q) 1734 return; 1735 1736 rxtid->win_sz = win_sz; 1737 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz); 1738 if (!skb_queue_empty(&rxtid->q)) 1739 return; 1740 1741 rxtid->aggr = true; 1742 } 1743 1744 void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info, 1745 struct aggr_info_conn *aggr_conn) 1746 { 1747 struct rxtid *rxtid; 1748 u8 i; 1749 1750 aggr_conn->aggr_sz = AGGR_SZ_DEFAULT; 1751 aggr_conn->dev = vif->ndev; 1752 init_timer(&aggr_conn->timer); 1753 aggr_conn->timer.function = aggr_timeout; 1754 aggr_conn->timer.data = (unsigned long) aggr_conn; 1755 aggr_conn->aggr_info = aggr_info; 1756 1757 aggr_conn->timer_scheduled = false; 1758 1759 for (i = 0; i < NUM_OF_TIDS; i++) { 1760 rxtid = &aggr_conn->rx_tid[i]; 1761 rxtid->aggr = false; 1762 rxtid->timer_mon = false; 1763 skb_queue_head_init(&rxtid->q); 1764 spin_lock_init(&rxtid->lock); 1765 } 1766 1767 } 1768 1769 struct aggr_info *aggr_init(struct ath6kl_vif *vif) 1770 { 1771 struct aggr_info *p_aggr = NULL; 1772 1773 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL); 1774 if (!p_aggr) { 1775 ath6kl_err("failed to alloc memory for aggr_node\n"); 1776 return NULL; 1777 } 1778 1779 p_aggr->aggr_conn = kzalloc(sizeof(struct aggr_info_conn), GFP_KERNEL); 1780 if (!p_aggr->aggr_conn) { 1781 ath6kl_err("failed to alloc memory for connection specific aggr info\n"); 1782 kfree(p_aggr); 1783 return NULL; 1784 } 1785 1786 aggr_conn_init(vif, p_aggr, p_aggr->aggr_conn); 1787 1788 skb_queue_head_init(&p_aggr->rx_amsdu_freeq); 1789 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, AGGR_NUM_OF_FREE_NETBUFS); 1790 1791 return p_aggr; 1792 } 1793 1794 void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid_mux) 1795 { 1796 struct ath6kl_sta *sta; 1797 struct rxtid *rxtid; 1798 struct aggr_info_conn *aggr_conn = NULL; 1799 u8 tid, aid; 1800 1801 if (vif->nw_type == AP_NETWORK) { 1802 aid = ath6kl_get_aid(tid_mux); 1803 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1804 if (sta) 1805 aggr_conn = sta->aggr_conn; 1806 } else 1807 aggr_conn = vif->aggr_cntxt->aggr_conn; 1808 1809 if (!aggr_conn) 1810 return; 1811 1812 tid = ath6kl_get_tid(tid_mux); 1813 if (tid >= NUM_OF_TIDS) 1814 return; 1815 1816 rxtid = &aggr_conn->rx_tid[tid]; 1817 1818 if (rxtid->aggr) 1819 aggr_delete_tid_state(aggr_conn, tid); 1820 } 1821 1822 void aggr_reset_state(struct aggr_info_conn *aggr_conn) 1823 { 1824 u8 tid; 1825 1826 if (!aggr_conn) 1827 return; 1828 1829 if (aggr_conn->timer_scheduled) { 1830 del_timer(&aggr_conn->timer); 1831 aggr_conn->timer_scheduled = false; 1832 } 1833 1834 for (tid = 0; tid < NUM_OF_TIDS; tid++) 1835 aggr_delete_tid_state(aggr_conn, tid); 1836 } 1837 1838 /* clean up our amsdu buffer list */ 1839 void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar) 1840 { 1841 struct htc_packet *packet, *tmp_pkt; 1842 1843 spin_lock_bh(&ar->lock); 1844 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 1845 spin_unlock_bh(&ar->lock); 1846 return; 1847 } 1848 1849 list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue, 1850 list) { 1851 list_del(&packet->list); 1852 spin_unlock_bh(&ar->lock); 1853 dev_kfree_skb(packet->pkt_cntxt); 1854 spin_lock_bh(&ar->lock); 1855 } 1856 1857 spin_unlock_bh(&ar->lock); 1858 } 1859 1860 void aggr_module_destroy(struct aggr_info *aggr_info) 1861 { 1862 if (!aggr_info) 1863 return; 1864 1865 aggr_reset_state(aggr_info->aggr_conn); 1866 skb_queue_purge(&aggr_info->rx_amsdu_freeq); 1867 kfree(aggr_info->aggr_conn); 1868 kfree(aggr_info); 1869 } 1870