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 #include "trace.h" 24 25 /* 26 * tid - tid_mux0..tid_mux3 27 * aid - tid_mux4..tid_mux7 28 */ 29 #define ATH6KL_TID_MASK 0xf 30 #define ATH6KL_AID_SHIFT 4 31 32 static inline u8 ath6kl_get_tid(u8 tid_mux) 33 { 34 return tid_mux & ATH6KL_TID_MASK; 35 } 36 37 static inline u8 ath6kl_get_aid(u8 tid_mux) 38 { 39 return tid_mux >> ATH6KL_AID_SHIFT; 40 } 41 42 static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev, 43 u32 *map_no) 44 { 45 struct ath6kl *ar = ath6kl_priv(dev); 46 struct ethhdr *eth_hdr; 47 u32 i, ep_map = -1; 48 u8 *datap; 49 50 *map_no = 0; 51 datap = skb->data; 52 eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr)); 53 54 if (is_multicast_ether_addr(eth_hdr->h_dest)) 55 return ENDPOINT_2; 56 57 for (i = 0; i < ar->node_num; i++) { 58 if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr, 59 ETH_ALEN) == 0) { 60 *map_no = i + 1; 61 ar->node_map[i].tx_pend++; 62 return ar->node_map[i].ep_id; 63 } 64 65 if ((ep_map == -1) && !ar->node_map[i].tx_pend) 66 ep_map = i; 67 } 68 69 if (ep_map == -1) { 70 ep_map = ar->node_num; 71 ar->node_num++; 72 if (ar->node_num > MAX_NODE_NUM) 73 return ENDPOINT_UNUSED; 74 } 75 76 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN); 77 78 for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) { 79 if (!ar->tx_pending[i]) { 80 ar->node_map[ep_map].ep_id = i; 81 break; 82 } 83 84 /* 85 * No free endpoint is available, start redistribution on 86 * the inuse endpoints. 87 */ 88 if (i == ENDPOINT_5) { 89 ar->node_map[ep_map].ep_id = ar->next_ep_id; 90 ar->next_ep_id++; 91 if (ar->next_ep_id > ENDPOINT_5) 92 ar->next_ep_id = ENDPOINT_2; 93 } 94 } 95 96 *map_no = ep_map + 1; 97 ar->node_map[ep_map].tx_pend++; 98 99 return ar->node_map[ep_map].ep_id; 100 } 101 102 static bool ath6kl_process_uapsdq(struct ath6kl_sta *conn, 103 struct ath6kl_vif *vif, 104 struct sk_buff *skb, 105 u32 *flags) 106 { 107 struct ath6kl *ar = vif->ar; 108 bool is_apsdq_empty = false; 109 struct ethhdr *datap = (struct ethhdr *) skb->data; 110 u8 up = 0, traffic_class, *ip_hdr; 111 u16 ether_type; 112 struct ath6kl_llc_snap_hdr *llc_hdr; 113 114 if (conn->sta_flags & STA_PS_APSD_TRIGGER) { 115 /* 116 * This tx is because of a uAPSD trigger, determine 117 * more and EOSP bit. Set EOSP if queue is empty 118 * or sufficient frames are delivered for this trigger. 119 */ 120 spin_lock_bh(&conn->psq_lock); 121 if (!skb_queue_empty(&conn->apsdq)) 122 *flags |= WMI_DATA_HDR_FLAGS_MORE; 123 else if (conn->sta_flags & STA_PS_APSD_EOSP) 124 *flags |= WMI_DATA_HDR_FLAGS_EOSP; 125 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 126 spin_unlock_bh(&conn->psq_lock); 127 return false; 128 } else if (!conn->apsd_info) 129 return false; 130 131 if (test_bit(WMM_ENABLED, &vif->flags)) { 132 ether_type = be16_to_cpu(datap->h_proto); 133 if (is_ethertype(ether_type)) { 134 /* packet is in DIX format */ 135 ip_hdr = (u8 *)(datap + 1); 136 } else { 137 /* packet is in 802.3 format */ 138 llc_hdr = (struct ath6kl_llc_snap_hdr *) 139 (datap + 1); 140 ether_type = be16_to_cpu(llc_hdr->eth_type); 141 ip_hdr = (u8 *)(llc_hdr + 1); 142 } 143 144 if (ether_type == IP_ETHERTYPE) 145 up = ath6kl_wmi_determine_user_priority( 146 ip_hdr, 0); 147 } 148 149 traffic_class = ath6kl_wmi_get_traffic_class(up); 150 151 if ((conn->apsd_info & (1 << traffic_class)) == 0) 152 return false; 153 154 /* Queue the frames if the STA is sleeping */ 155 spin_lock_bh(&conn->psq_lock); 156 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 157 skb_queue_tail(&conn->apsdq, skb); 158 spin_unlock_bh(&conn->psq_lock); 159 160 /* 161 * If this is the first pkt getting queued 162 * for this STA, update the PVB for this STA 163 */ 164 if (is_apsdq_empty) { 165 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 166 vif->fw_vif_idx, 167 conn->aid, 1, 0); 168 } 169 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 170 171 return true; 172 } 173 174 static bool ath6kl_process_psq(struct ath6kl_sta *conn, 175 struct ath6kl_vif *vif, 176 struct sk_buff *skb, 177 u32 *flags) 178 { 179 bool is_psq_empty = false; 180 struct ath6kl *ar = vif->ar; 181 182 if (conn->sta_flags & STA_PS_POLLED) { 183 spin_lock_bh(&conn->psq_lock); 184 if (!skb_queue_empty(&conn->psq)) 185 *flags |= WMI_DATA_HDR_FLAGS_MORE; 186 spin_unlock_bh(&conn->psq_lock); 187 return false; 188 } 189 190 /* Queue the frames if the STA is sleeping */ 191 spin_lock_bh(&conn->psq_lock); 192 is_psq_empty = skb_queue_empty(&conn->psq); 193 skb_queue_tail(&conn->psq, skb); 194 spin_unlock_bh(&conn->psq_lock); 195 196 /* 197 * If this is the first pkt getting queued 198 * for this STA, update the PVB for this 199 * STA. 200 */ 201 if (is_psq_empty) 202 ath6kl_wmi_set_pvb_cmd(ar->wmi, 203 vif->fw_vif_idx, 204 conn->aid, 1); 205 return true; 206 } 207 208 static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb, 209 u32 *flags) 210 { 211 struct ethhdr *datap = (struct ethhdr *) skb->data; 212 struct ath6kl_sta *conn = NULL; 213 bool ps_queued = false; 214 struct ath6kl *ar = vif->ar; 215 216 if (is_multicast_ether_addr(datap->h_dest)) { 217 u8 ctr = 0; 218 bool q_mcast = false; 219 220 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) { 221 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) { 222 q_mcast = true; 223 break; 224 } 225 } 226 227 if (q_mcast) { 228 /* 229 * If this transmit is not because of a Dtim Expiry 230 * q it. 231 */ 232 if (!test_bit(DTIM_EXPIRED, &vif->flags)) { 233 bool is_mcastq_empty = false; 234 235 spin_lock_bh(&ar->mcastpsq_lock); 236 is_mcastq_empty = 237 skb_queue_empty(&ar->mcastpsq); 238 skb_queue_tail(&ar->mcastpsq, skb); 239 spin_unlock_bh(&ar->mcastpsq_lock); 240 241 /* 242 * If this is the first Mcast pkt getting 243 * queued indicate to the target to set the 244 * BitmapControl LSB of the TIM IE. 245 */ 246 if (is_mcastq_empty) 247 ath6kl_wmi_set_pvb_cmd(ar->wmi, 248 vif->fw_vif_idx, 249 MCAST_AID, 1); 250 251 ps_queued = true; 252 } else { 253 /* 254 * This transmit is because of Dtim expiry. 255 * Determine if MoreData bit has to be set. 256 */ 257 spin_lock_bh(&ar->mcastpsq_lock); 258 if (!skb_queue_empty(&ar->mcastpsq)) 259 *flags |= WMI_DATA_HDR_FLAGS_MORE; 260 spin_unlock_bh(&ar->mcastpsq_lock); 261 } 262 } 263 } else { 264 conn = ath6kl_find_sta(vif, datap->h_dest); 265 if (!conn) { 266 dev_kfree_skb(skb); 267 268 /* Inform the caller that the skb is consumed */ 269 return true; 270 } 271 272 if (conn->sta_flags & STA_PS_SLEEP) { 273 ps_queued = ath6kl_process_uapsdq(conn, 274 vif, skb, flags); 275 if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD)) 276 ps_queued = ath6kl_process_psq(conn, 277 vif, skb, flags); 278 } 279 } 280 return ps_queued; 281 } 282 283 /* Tx functions */ 284 285 int ath6kl_control_tx(void *devt, struct sk_buff *skb, 286 enum htc_endpoint_id eid) 287 { 288 struct ath6kl *ar = devt; 289 int status = 0; 290 struct ath6kl_cookie *cookie = NULL; 291 292 trace_ath6kl_wmi_cmd(skb->data, skb->len); 293 294 if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW)) { 295 dev_kfree_skb(skb); 296 return -EACCES; 297 } 298 299 if (WARN_ON_ONCE(eid == ENDPOINT_UNUSED || 300 eid >= ENDPOINT_MAX)) { 301 status = -EINVAL; 302 goto fail_ctrl_tx; 303 } 304 305 spin_lock_bh(&ar->lock); 306 307 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 308 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__, 309 skb, skb->len, eid); 310 311 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) { 312 /* 313 * Control endpoint is full, don't allocate resources, we 314 * are just going to drop this packet. 315 */ 316 cookie = NULL; 317 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n", 318 skb, skb->len); 319 } else 320 cookie = ath6kl_alloc_cookie(ar); 321 322 if (cookie == NULL) { 323 spin_unlock_bh(&ar->lock); 324 status = -ENOMEM; 325 goto fail_ctrl_tx; 326 } 327 328 ar->tx_pending[eid]++; 329 330 if (eid != ar->ctrl_ep) 331 ar->total_tx_data_pend++; 332 333 spin_unlock_bh(&ar->lock); 334 335 cookie->skb = skb; 336 cookie->map_no = 0; 337 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 338 eid, ATH6KL_CONTROL_PKT_TAG); 339 cookie->htc_pkt.skb = skb; 340 341 /* 342 * This interface is asynchronous, if there is an error, cleanup 343 * will happen in the TX completion callback. 344 */ 345 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 346 347 return 0; 348 349 fail_ctrl_tx: 350 dev_kfree_skb(skb); 351 return status; 352 } 353 354 int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev) 355 { 356 struct ath6kl *ar = ath6kl_priv(dev); 357 struct ath6kl_cookie *cookie = NULL; 358 enum htc_endpoint_id eid = ENDPOINT_UNUSED; 359 struct ath6kl_vif *vif = netdev_priv(dev); 360 u32 map_no = 0; 361 u16 htc_tag = ATH6KL_DATA_PKT_TAG; 362 u8 ac = 99 ; /* initialize to unmapped ac */ 363 bool chk_adhoc_ps_mapping = false; 364 int ret; 365 struct wmi_tx_meta_v2 meta_v2; 366 void *meta; 367 u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed; 368 u8 meta_ver = 0; 369 u32 flags = 0; 370 371 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 372 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__, 373 skb, skb->data, skb->len); 374 375 /* If target is not associated */ 376 if (!test_bit(CONNECTED, &vif->flags)) 377 goto fail_tx; 378 379 if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON)) 380 goto fail_tx; 381 382 if (!test_bit(WMI_READY, &ar->flag)) 383 goto fail_tx; 384 385 /* AP mode Power saving processing */ 386 if (vif->nw_type == AP_NETWORK) { 387 if (ath6kl_powersave_ap(vif, skb, &flags)) 388 return 0; 389 } 390 391 if (test_bit(WMI_ENABLED, &ar->flag)) { 392 if ((dev->features & NETIF_F_IP_CSUM) && 393 (csum == CHECKSUM_PARTIAL)) { 394 csum_start = skb->csum_start - 395 (skb_network_header(skb) - skb->head) + 396 sizeof(struct ath6kl_llc_snap_hdr); 397 csum_dest = skb->csum_offset + csum_start; 398 } 399 400 if (skb_headroom(skb) < dev->needed_headroom) { 401 struct sk_buff *tmp_skb = skb; 402 403 skb = skb_realloc_headroom(skb, dev->needed_headroom); 404 kfree_skb(tmp_skb); 405 if (skb == NULL) { 406 vif->net_stats.tx_dropped++; 407 return 0; 408 } 409 } 410 411 if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) { 412 ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n"); 413 goto fail_tx; 414 } 415 416 if ((dev->features & NETIF_F_IP_CSUM) && 417 (csum == CHECKSUM_PARTIAL)) { 418 meta_v2.csum_start = csum_start; 419 meta_v2.csum_dest = csum_dest; 420 421 /* instruct target to calculate checksum */ 422 meta_v2.csum_flags = WMI_META_V2_FLAG_CSUM_OFFLOAD; 423 meta_ver = WMI_META_VERSION_2; 424 meta = &meta_v2; 425 } else { 426 meta_ver = 0; 427 meta = NULL; 428 } 429 430 ret = ath6kl_wmi_data_hdr_add(ar->wmi, skb, 431 DATA_MSGTYPE, flags, 0, 432 meta_ver, 433 meta, vif->fw_vif_idx); 434 435 if (ret) { 436 ath6kl_warn("failed to add wmi data header:%d\n" 437 , ret); 438 goto fail_tx; 439 } 440 441 if ((vif->nw_type == ADHOC_NETWORK) && 442 ar->ibss_ps_enable && test_bit(CONNECTED, &vif->flags)) 443 chk_adhoc_ps_mapping = true; 444 else { 445 /* get the stream mapping */ 446 ret = ath6kl_wmi_implicit_create_pstream(ar->wmi, 447 vif->fw_vif_idx, skb, 448 0, test_bit(WMM_ENABLED, &vif->flags), &ac); 449 if (ret) 450 goto fail_tx; 451 } 452 } else 453 goto fail_tx; 454 455 spin_lock_bh(&ar->lock); 456 457 if (chk_adhoc_ps_mapping) 458 eid = ath6kl_ibss_map_epid(skb, dev, &map_no); 459 else 460 eid = ar->ac2ep_map[ac]; 461 462 if (eid == 0 || eid == ENDPOINT_UNUSED) { 463 ath6kl_err("eid %d is not mapped!\n", eid); 464 spin_unlock_bh(&ar->lock); 465 goto fail_tx; 466 } 467 468 /* allocate resource for this packet */ 469 cookie = ath6kl_alloc_cookie(ar); 470 471 if (!cookie) { 472 spin_unlock_bh(&ar->lock); 473 goto fail_tx; 474 } 475 476 /* update counts while the lock is held */ 477 ar->tx_pending[eid]++; 478 ar->total_tx_data_pend++; 479 480 spin_unlock_bh(&ar->lock); 481 482 if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) && 483 skb_cloned(skb)) { 484 /* 485 * We will touch (move the buffer data to align it. Since the 486 * skb buffer is cloned and not only the header is changed, we 487 * have to copy it to allow the changes. Since we are copying 488 * the data here, we may as well align it by reserving suitable 489 * headroom to avoid the memmove in ath6kl_htc_tx_buf_align(). 490 */ 491 struct sk_buff *nskb; 492 493 nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC); 494 if (nskb == NULL) 495 goto fail_tx; 496 kfree_skb(skb); 497 skb = nskb; 498 } 499 500 cookie->skb = skb; 501 cookie->map_no = map_no; 502 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 503 eid, htc_tag); 504 cookie->htc_pkt.skb = skb; 505 506 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ", 507 skb->data, skb->len); 508 509 /* 510 * HTC interface is asynchronous, if this fails, cleanup will 511 * happen in the ath6kl_tx_complete callback. 512 */ 513 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 514 515 return 0; 516 517 fail_tx: 518 dev_kfree_skb(skb); 519 520 vif->net_stats.tx_dropped++; 521 vif->net_stats.tx_aborted_errors++; 522 523 return 0; 524 } 525 526 /* indicate tx activity or inactivity on a WMI stream */ 527 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active) 528 { 529 struct ath6kl *ar = devt; 530 enum htc_endpoint_id eid; 531 int i; 532 533 eid = ar->ac2ep_map[traffic_class]; 534 535 if (!test_bit(WMI_ENABLED, &ar->flag)) 536 goto notify_htc; 537 538 spin_lock_bh(&ar->lock); 539 540 ar->ac_stream_active[traffic_class] = active; 541 542 if (active) { 543 /* 544 * Keep track of the active stream with the highest 545 * priority. 546 */ 547 if (ar->ac_stream_pri_map[traffic_class] > 548 ar->hiac_stream_active_pri) 549 /* set the new highest active priority */ 550 ar->hiac_stream_active_pri = 551 ar->ac_stream_pri_map[traffic_class]; 552 553 } else { 554 /* 555 * We may have to search for the next active stream 556 * that is the highest priority. 557 */ 558 if (ar->hiac_stream_active_pri == 559 ar->ac_stream_pri_map[traffic_class]) { 560 /* 561 * The highest priority stream just went inactive 562 * reset and search for the "next" highest "active" 563 * priority stream. 564 */ 565 ar->hiac_stream_active_pri = 0; 566 567 for (i = 0; i < WMM_NUM_AC; i++) { 568 if (ar->ac_stream_active[i] && 569 (ar->ac_stream_pri_map[i] > 570 ar->hiac_stream_active_pri)) 571 /* 572 * Set the new highest active 573 * priority. 574 */ 575 ar->hiac_stream_active_pri = 576 ar->ac_stream_pri_map[i]; 577 } 578 } 579 } 580 581 spin_unlock_bh(&ar->lock); 582 583 notify_htc: 584 /* notify HTC, this may cause credit distribution changes */ 585 ath6kl_htc_activity_changed(ar->htc_target, eid, active); 586 } 587 588 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target, 589 struct htc_packet *packet) 590 { 591 struct ath6kl *ar = target->dev->ar; 592 struct ath6kl_vif *vif; 593 enum htc_endpoint_id endpoint = packet->endpoint; 594 enum htc_send_full_action action = HTC_SEND_FULL_KEEP; 595 596 if (endpoint == ar->ctrl_ep) { 597 /* 598 * Under normal WMI if this is getting full, then something 599 * is running rampant the host should not be exhausting the 600 * WMI queue with too many commands the only exception to 601 * this is during testing using endpointping. 602 */ 603 set_bit(WMI_CTRL_EP_FULL, &ar->flag); 604 ath6kl_err("wmi ctrl ep is full\n"); 605 ath6kl_recovery_err_notify(ar, ATH6KL_FW_EP_FULL); 606 return action; 607 } 608 609 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG) 610 return action; 611 612 /* 613 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for 614 * the highest active stream. 615 */ 616 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] < 617 ar->hiac_stream_active_pri && 618 ar->cookie_count <= 619 target->endpoint[endpoint].tx_drop_packet_threshold) 620 /* 621 * Give preference to the highest priority stream by 622 * dropping the packets which overflowed. 623 */ 624 action = HTC_SEND_FULL_DROP; 625 626 /* FIXME: Locking */ 627 spin_lock_bh(&ar->list_lock); 628 list_for_each_entry(vif, &ar->vif_list, list) { 629 if (vif->nw_type == ADHOC_NETWORK || 630 action != HTC_SEND_FULL_DROP) { 631 spin_unlock_bh(&ar->list_lock); 632 633 set_bit(NETQ_STOPPED, &vif->flags); 634 netif_stop_queue(vif->ndev); 635 636 return action; 637 } 638 } 639 spin_unlock_bh(&ar->list_lock); 640 641 return action; 642 } 643 644 /* TODO this needs to be looked at */ 645 static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif, 646 enum htc_endpoint_id eid, u32 map_no) 647 { 648 struct ath6kl *ar = vif->ar; 649 u32 i; 650 651 if (vif->nw_type != ADHOC_NETWORK) 652 return; 653 654 if (!ar->ibss_ps_enable) 655 return; 656 657 if (eid == ar->ctrl_ep) 658 return; 659 660 if (map_no == 0) 661 return; 662 663 map_no--; 664 ar->node_map[map_no].tx_pend--; 665 666 if (ar->node_map[map_no].tx_pend) 667 return; 668 669 if (map_no != (ar->node_num - 1)) 670 return; 671 672 for (i = ar->node_num; i > 0; i--) { 673 if (ar->node_map[i - 1].tx_pend) 674 break; 675 676 memset(&ar->node_map[i - 1], 0, 677 sizeof(struct ath6kl_node_mapping)); 678 ar->node_num--; 679 } 680 } 681 682 void ath6kl_tx_complete(struct htc_target *target, 683 struct list_head *packet_queue) 684 { 685 struct ath6kl *ar = target->dev->ar; 686 struct sk_buff_head skb_queue; 687 struct htc_packet *packet; 688 struct sk_buff *skb; 689 struct ath6kl_cookie *ath6kl_cookie; 690 u32 map_no = 0; 691 int status; 692 enum htc_endpoint_id eid; 693 bool wake_event = false; 694 bool flushing[ATH6KL_VIF_MAX] = {false}; 695 u8 if_idx; 696 struct ath6kl_vif *vif; 697 698 skb_queue_head_init(&skb_queue); 699 700 /* lock the driver as we update internal state */ 701 spin_lock_bh(&ar->lock); 702 703 /* reap completed packets */ 704 while (!list_empty(packet_queue)) { 705 706 packet = list_first_entry(packet_queue, struct htc_packet, 707 list); 708 list_del(&packet->list); 709 710 if (WARN_ON_ONCE(packet->endpoint == ENDPOINT_UNUSED || 711 packet->endpoint >= ENDPOINT_MAX)) 712 continue; 713 714 ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt; 715 if (WARN_ON_ONCE(!ath6kl_cookie)) 716 continue; 717 718 status = packet->status; 719 skb = ath6kl_cookie->skb; 720 eid = packet->endpoint; 721 map_no = ath6kl_cookie->map_no; 722 723 if (WARN_ON_ONCE(!skb || !skb->data)) { 724 dev_kfree_skb(skb); 725 ath6kl_free_cookie(ar, ath6kl_cookie); 726 continue; 727 } 728 729 __skb_queue_tail(&skb_queue, skb); 730 731 if (WARN_ON_ONCE(!status && (packet->act_len != skb->len))) { 732 ath6kl_free_cookie(ar, ath6kl_cookie); 733 continue; 734 } 735 736 ar->tx_pending[eid]--; 737 738 if (eid != ar->ctrl_ep) 739 ar->total_tx_data_pend--; 740 741 if (eid == ar->ctrl_ep) { 742 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag)) 743 clear_bit(WMI_CTRL_EP_FULL, &ar->flag); 744 745 if (ar->tx_pending[eid] == 0) 746 wake_event = true; 747 } 748 749 if (eid == ar->ctrl_ep) { 750 if_idx = wmi_cmd_hdr_get_if_idx( 751 (struct wmi_cmd_hdr *) packet->buf); 752 } else { 753 if_idx = wmi_data_hdr_get_if_idx( 754 (struct wmi_data_hdr *) packet->buf); 755 } 756 757 vif = ath6kl_get_vif_by_index(ar, if_idx); 758 if (!vif) { 759 ath6kl_free_cookie(ar, ath6kl_cookie); 760 continue; 761 } 762 763 if (status) { 764 if (status == -ECANCELED) 765 /* a packet was flushed */ 766 flushing[if_idx] = true; 767 768 vif->net_stats.tx_errors++; 769 770 if (status != -ENOSPC && status != -ECANCELED) 771 ath6kl_warn("tx complete error: %d\n", status); 772 773 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 774 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 775 __func__, skb, packet->buf, packet->act_len, 776 eid, "error!"); 777 } else { 778 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 779 "%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n", 780 __func__, skb, packet->buf, packet->act_len, 781 eid, "OK"); 782 783 flushing[if_idx] = false; 784 vif->net_stats.tx_packets++; 785 vif->net_stats.tx_bytes += skb->len; 786 } 787 788 ath6kl_tx_clear_node_map(vif, eid, map_no); 789 790 ath6kl_free_cookie(ar, ath6kl_cookie); 791 792 if (test_bit(NETQ_STOPPED, &vif->flags)) 793 clear_bit(NETQ_STOPPED, &vif->flags); 794 } 795 796 spin_unlock_bh(&ar->lock); 797 798 __skb_queue_purge(&skb_queue); 799 800 /* FIXME: Locking */ 801 spin_lock_bh(&ar->list_lock); 802 list_for_each_entry(vif, &ar->vif_list, list) { 803 if (test_bit(CONNECTED, &vif->flags) && 804 !flushing[vif->fw_vif_idx]) { 805 spin_unlock_bh(&ar->list_lock); 806 netif_wake_queue(vif->ndev); 807 spin_lock_bh(&ar->list_lock); 808 } 809 } 810 spin_unlock_bh(&ar->list_lock); 811 812 if (wake_event) 813 wake_up(&ar->event_wq); 814 815 return; 816 } 817 818 void ath6kl_tx_data_cleanup(struct ath6kl *ar) 819 { 820 int i; 821 822 /* flush all the data (non-control) streams */ 823 for (i = 0; i < WMM_NUM_AC; i++) 824 ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i], 825 ATH6KL_DATA_PKT_TAG); 826 } 827 828 /* Rx functions */ 829 830 static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev, 831 struct sk_buff *skb) 832 { 833 if (!skb) 834 return; 835 836 skb->dev = dev; 837 838 if (!(skb->dev->flags & IFF_UP)) { 839 dev_kfree_skb(skb); 840 return; 841 } 842 843 skb->protocol = eth_type_trans(skb, skb->dev); 844 845 netif_rx_ni(skb); 846 } 847 848 static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num) 849 { 850 struct sk_buff *skb; 851 852 while (num) { 853 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 854 if (!skb) { 855 ath6kl_err("netbuf allocation failed\n"); 856 return; 857 } 858 skb_queue_tail(q, skb); 859 num--; 860 } 861 } 862 863 static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr) 864 { 865 struct sk_buff *skb = NULL; 866 867 if (skb_queue_len(&p_aggr->rx_amsdu_freeq) < 868 (AGGR_NUM_OF_FREE_NETBUFS >> 2)) 869 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, 870 AGGR_NUM_OF_FREE_NETBUFS); 871 872 skb = skb_dequeue(&p_aggr->rx_amsdu_freeq); 873 874 return skb; 875 } 876 877 void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint) 878 { 879 struct ath6kl *ar = target->dev->ar; 880 struct sk_buff *skb; 881 int rx_buf; 882 int n_buf_refill; 883 struct htc_packet *packet; 884 struct list_head queue; 885 886 n_buf_refill = ATH6KL_MAX_RX_BUFFERS - 887 ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint); 888 889 if (n_buf_refill <= 0) 890 return; 891 892 INIT_LIST_HEAD(&queue); 893 894 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 895 "%s: providing htc with %d buffers at eid=%d\n", 896 __func__, n_buf_refill, endpoint); 897 898 for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) { 899 skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE); 900 if (!skb) 901 break; 902 903 packet = (struct htc_packet *) skb->head; 904 if (!IS_ALIGNED((unsigned long) skb->data, 4)) { 905 size_t len = skb_headlen(skb); 906 skb->data = PTR_ALIGN(skb->data - 4, 4); 907 skb_set_tail_pointer(skb, len); 908 } 909 set_htc_rxpkt_info(packet, skb, skb->data, 910 ATH6KL_BUFFER_SIZE, endpoint); 911 packet->skb = skb; 912 list_add_tail(&packet->list, &queue); 913 } 914 915 if (!list_empty(&queue)) 916 ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue); 917 } 918 919 void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count) 920 { 921 struct htc_packet *packet; 922 struct sk_buff *skb; 923 924 while (count) { 925 skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE); 926 if (!skb) 927 return; 928 929 packet = (struct htc_packet *) skb->head; 930 if (!IS_ALIGNED((unsigned long) skb->data, 4)) { 931 size_t len = skb_headlen(skb); 932 skb->data = PTR_ALIGN(skb->data - 4, 4); 933 skb_set_tail_pointer(skb, len); 934 } 935 set_htc_rxpkt_info(packet, skb, skb->data, 936 ATH6KL_AMSDU_BUFFER_SIZE, 0); 937 packet->skb = skb; 938 939 spin_lock_bh(&ar->lock); 940 list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue); 941 spin_unlock_bh(&ar->lock); 942 count--; 943 } 944 } 945 946 /* 947 * Callback to allocate a receive buffer for a pending packet. We use a 948 * pre-allocated list of buffers of maximum AMSDU size (4K). 949 */ 950 struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target, 951 enum htc_endpoint_id endpoint, 952 int len) 953 { 954 struct ath6kl *ar = target->dev->ar; 955 struct htc_packet *packet = NULL; 956 struct list_head *pkt_pos; 957 int refill_cnt = 0, depth = 0; 958 959 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n", 960 __func__, endpoint, len); 961 962 if ((len <= ATH6KL_BUFFER_SIZE) || 963 (len > ATH6KL_AMSDU_BUFFER_SIZE)) 964 return NULL; 965 966 spin_lock_bh(&ar->lock); 967 968 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 969 spin_unlock_bh(&ar->lock); 970 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS; 971 goto refill_buf; 972 } 973 974 packet = list_first_entry(&ar->amsdu_rx_buffer_queue, 975 struct htc_packet, list); 976 list_del(&packet->list); 977 list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue) 978 depth++; 979 980 refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth; 981 spin_unlock_bh(&ar->lock); 982 983 /* set actual endpoint ID */ 984 packet->endpoint = endpoint; 985 986 refill_buf: 987 if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD) 988 ath6kl_refill_amsdu_rxbufs(ar, refill_cnt); 989 990 return packet; 991 } 992 993 static void aggr_slice_amsdu(struct aggr_info *p_aggr, 994 struct rxtid *rxtid, struct sk_buff *skb) 995 { 996 struct sk_buff *new_skb; 997 struct ethhdr *hdr; 998 u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len; 999 u8 *framep; 1000 1001 mac_hdr_len = sizeof(struct ethhdr); 1002 framep = skb->data + mac_hdr_len; 1003 amsdu_len = skb->len - mac_hdr_len; 1004 1005 while (amsdu_len > mac_hdr_len) { 1006 hdr = (struct ethhdr *) framep; 1007 payload_8023_len = ntohs(hdr->h_proto); 1008 1009 if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN || 1010 payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) { 1011 ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n", 1012 payload_8023_len); 1013 break; 1014 } 1015 1016 frame_8023_len = payload_8023_len + mac_hdr_len; 1017 new_skb = aggr_get_free_skb(p_aggr); 1018 if (!new_skb) { 1019 ath6kl_err("no buffer available\n"); 1020 break; 1021 } 1022 1023 memcpy(new_skb->data, framep, frame_8023_len); 1024 skb_put(new_skb, frame_8023_len); 1025 if (ath6kl_wmi_dot3_2_dix(new_skb)) { 1026 ath6kl_err("dot3_2_dix error\n"); 1027 dev_kfree_skb(new_skb); 1028 break; 1029 } 1030 1031 skb_queue_tail(&rxtid->q, new_skb); 1032 1033 /* Is this the last subframe within this aggregate ? */ 1034 if ((amsdu_len - frame_8023_len) == 0) 1035 break; 1036 1037 /* Add the length of A-MSDU subframe padding bytes - 1038 * Round to nearest word. 1039 */ 1040 frame_8023_len = ALIGN(frame_8023_len, 4); 1041 1042 framep += frame_8023_len; 1043 amsdu_len -= frame_8023_len; 1044 } 1045 1046 dev_kfree_skb(skb); 1047 } 1048 1049 static void aggr_deque_frms(struct aggr_info_conn *agg_conn, u8 tid, 1050 u16 seq_no, u8 order) 1051 { 1052 struct sk_buff *skb; 1053 struct rxtid *rxtid; 1054 struct skb_hold_q *node; 1055 u16 idx, idx_end, seq_end; 1056 struct rxtid_stats *stats; 1057 1058 rxtid = &agg_conn->rx_tid[tid]; 1059 stats = &agg_conn->stat[tid]; 1060 1061 spin_lock_bh(&rxtid->lock); 1062 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1063 1064 /* 1065 * idx_end is typically the last possible frame in the window, 1066 * but changes to 'the' seq_no, when BAR comes. If seq_no 1067 * is non-zero, we will go up to that and stop. 1068 * Note: last seq no in current window will occupy the same 1069 * index position as index that is just previous to start. 1070 * An imp point : if win_sz is 7, for seq_no space of 4095, 1071 * then, there would be holes when sequence wrap around occurs. 1072 * Target should judiciously choose the win_sz, based on 1073 * this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz 1074 * 2, 4, 8, 16 win_sz works fine). 1075 * We must deque from "idx" to "idx_end", including both. 1076 */ 1077 seq_end = seq_no ? seq_no : rxtid->seq_next; 1078 idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz); 1079 1080 do { 1081 node = &rxtid->hold_q[idx]; 1082 if ((order == 1) && (!node->skb)) 1083 break; 1084 1085 if (node->skb) { 1086 if (node->is_amsdu) 1087 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, 1088 node->skb); 1089 else 1090 skb_queue_tail(&rxtid->q, node->skb); 1091 node->skb = NULL; 1092 } else 1093 stats->num_hole++; 1094 1095 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next); 1096 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1097 } while (idx != idx_end); 1098 1099 spin_unlock_bh(&rxtid->lock); 1100 1101 stats->num_delivered += skb_queue_len(&rxtid->q); 1102 1103 while ((skb = skb_dequeue(&rxtid->q))) 1104 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, skb); 1105 } 1106 1107 static bool aggr_process_recv_frm(struct aggr_info_conn *agg_conn, u8 tid, 1108 u16 seq_no, 1109 bool is_amsdu, struct sk_buff *frame) 1110 { 1111 struct rxtid *rxtid; 1112 struct rxtid_stats *stats; 1113 struct sk_buff *skb; 1114 struct skb_hold_q *node; 1115 u16 idx, st, cur, end; 1116 bool is_queued = false; 1117 u16 extended_end; 1118 1119 rxtid = &agg_conn->rx_tid[tid]; 1120 stats = &agg_conn->stat[tid]; 1121 1122 stats->num_into_aggr++; 1123 1124 if (!rxtid->aggr) { 1125 if (is_amsdu) { 1126 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, frame); 1127 is_queued = true; 1128 stats->num_amsdu++; 1129 while ((skb = skb_dequeue(&rxtid->q))) 1130 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, 1131 skb); 1132 } 1133 return is_queued; 1134 } 1135 1136 /* Check the incoming sequence no, if it's in the window */ 1137 st = rxtid->seq_next; 1138 cur = seq_no; 1139 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO; 1140 1141 if (((st < end) && (cur < st || cur > end)) || 1142 ((st > end) && (cur > end) && (cur < st))) { 1143 extended_end = (end + rxtid->hold_q_sz - 1) & 1144 ATH6KL_MAX_SEQ_NO; 1145 1146 if (((end < extended_end) && 1147 (cur < end || cur > extended_end)) || 1148 ((end > extended_end) && (cur > extended_end) && 1149 (cur < end))) { 1150 aggr_deque_frms(agg_conn, tid, 0, 0); 1151 spin_lock_bh(&rxtid->lock); 1152 if (cur >= rxtid->hold_q_sz - 1) 1153 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1); 1154 else 1155 rxtid->seq_next = ATH6KL_MAX_SEQ_NO - 1156 (rxtid->hold_q_sz - 2 - cur); 1157 spin_unlock_bh(&rxtid->lock); 1158 } else { 1159 /* 1160 * Dequeue only those frames that are outside the 1161 * new shifted window. 1162 */ 1163 if (cur >= rxtid->hold_q_sz - 1) 1164 st = cur - (rxtid->hold_q_sz - 1); 1165 else 1166 st = ATH6KL_MAX_SEQ_NO - 1167 (rxtid->hold_q_sz - 2 - cur); 1168 1169 aggr_deque_frms(agg_conn, tid, st, 0); 1170 } 1171 1172 stats->num_oow++; 1173 } 1174 1175 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz); 1176 1177 node = &rxtid->hold_q[idx]; 1178 1179 spin_lock_bh(&rxtid->lock); 1180 1181 /* 1182 * Is the cur frame duplicate or something beyond our window(hold_q 1183 * -> which is 2x, already)? 1184 * 1185 * 1. Duplicate is easy - drop incoming frame. 1186 * 2. Not falling in current sliding window. 1187 * 2a. is the frame_seq_no preceding current tid_seq_no? 1188 * -> drop the frame. perhaps sender did not get our ACK. 1189 * this is taken care of above. 1190 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ); 1191 * -> Taken care of it above, by moving window forward. 1192 */ 1193 dev_kfree_skb(node->skb); 1194 stats->num_dups++; 1195 1196 node->skb = frame; 1197 is_queued = true; 1198 node->is_amsdu = is_amsdu; 1199 node->seq_no = seq_no; 1200 1201 if (node->is_amsdu) 1202 stats->num_amsdu++; 1203 else 1204 stats->num_mpdu++; 1205 1206 spin_unlock_bh(&rxtid->lock); 1207 1208 aggr_deque_frms(agg_conn, tid, 0, 1); 1209 1210 if (agg_conn->timer_scheduled) 1211 return is_queued; 1212 1213 spin_lock_bh(&rxtid->lock); 1214 for (idx = 0 ; idx < rxtid->hold_q_sz; idx++) { 1215 if (rxtid->hold_q[idx].skb) { 1216 /* 1217 * There is a frame in the queue and no 1218 * timer so start a timer to ensure that 1219 * the frame doesn't remain stuck 1220 * forever. 1221 */ 1222 agg_conn->timer_scheduled = true; 1223 mod_timer(&agg_conn->timer, 1224 (jiffies + (HZ * AGGR_RX_TIMEOUT) / 1000)); 1225 rxtid->timer_mon = true; 1226 break; 1227 } 1228 } 1229 spin_unlock_bh(&rxtid->lock); 1230 1231 return is_queued; 1232 } 1233 1234 static void ath6kl_uapsd_trigger_frame_rx(struct ath6kl_vif *vif, 1235 struct ath6kl_sta *conn) 1236 { 1237 struct ath6kl *ar = vif->ar; 1238 bool is_apsdq_empty, is_apsdq_empty_at_start; 1239 u32 num_frames_to_deliver, flags; 1240 struct sk_buff *skb = NULL; 1241 1242 /* 1243 * If the APSD q for this STA is not empty, dequeue and 1244 * send a pkt from the head of the q. Also update the 1245 * More data bit in the WMI_DATA_HDR if there are 1246 * more pkts for this STA in the APSD q. 1247 * If there are no more pkts for this STA, 1248 * update the APSD bitmap for this STA. 1249 */ 1250 1251 num_frames_to_deliver = (conn->apsd_info >> ATH6KL_APSD_NUM_OF_AC) & 1252 ATH6KL_APSD_FRAME_MASK; 1253 /* 1254 * Number of frames to send in a service period is 1255 * indicated by the station 1256 * in the QOS_INFO of the association request 1257 * If it is zero, send all frames 1258 */ 1259 if (!num_frames_to_deliver) 1260 num_frames_to_deliver = ATH6KL_APSD_ALL_FRAME; 1261 1262 spin_lock_bh(&conn->psq_lock); 1263 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1264 spin_unlock_bh(&conn->psq_lock); 1265 is_apsdq_empty_at_start = is_apsdq_empty; 1266 1267 while ((!is_apsdq_empty) && (num_frames_to_deliver)) { 1268 1269 spin_lock_bh(&conn->psq_lock); 1270 skb = skb_dequeue(&conn->apsdq); 1271 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1272 spin_unlock_bh(&conn->psq_lock); 1273 1274 /* 1275 * Set the STA flag to Trigger delivery, 1276 * so that the frame will go out 1277 */ 1278 conn->sta_flags |= STA_PS_APSD_TRIGGER; 1279 num_frames_to_deliver--; 1280 1281 /* Last frame in the service period, set EOSP or queue empty */ 1282 if ((is_apsdq_empty) || (!num_frames_to_deliver)) 1283 conn->sta_flags |= STA_PS_APSD_EOSP; 1284 1285 ath6kl_data_tx(skb, vif->ndev); 1286 conn->sta_flags &= ~(STA_PS_APSD_TRIGGER); 1287 conn->sta_flags &= ~(STA_PS_APSD_EOSP); 1288 } 1289 1290 if (is_apsdq_empty) { 1291 if (is_apsdq_empty_at_start) 1292 flags = WMI_AP_APSD_NO_DELIVERY_FRAMES; 1293 else 1294 flags = 0; 1295 1296 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 1297 vif->fw_vif_idx, 1298 conn->aid, 0, flags); 1299 } 1300 1301 return; 1302 } 1303 1304 void ath6kl_rx(struct htc_target *target, struct htc_packet *packet) 1305 { 1306 struct ath6kl *ar = target->dev->ar; 1307 struct sk_buff *skb = packet->pkt_cntxt; 1308 struct wmi_rx_meta_v2 *meta; 1309 struct wmi_data_hdr *dhdr; 1310 int min_hdr_len; 1311 u8 meta_type, dot11_hdr = 0; 1312 u8 pad_before_data_start; 1313 int status = packet->status; 1314 enum htc_endpoint_id ept = packet->endpoint; 1315 bool is_amsdu, prev_ps, ps_state = false; 1316 bool trig_state = false; 1317 struct ath6kl_sta *conn = NULL; 1318 struct sk_buff *skb1 = NULL; 1319 struct ethhdr *datap = NULL; 1320 struct ath6kl_vif *vif; 1321 struct aggr_info_conn *aggr_conn; 1322 u16 seq_no, offset; 1323 u8 tid, if_idx; 1324 1325 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, 1326 "%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d", 1327 __func__, ar, ept, skb, packet->buf, 1328 packet->act_len, status); 1329 1330 if (status || !(skb->data + HTC_HDR_LENGTH)) { 1331 dev_kfree_skb(skb); 1332 return; 1333 } 1334 1335 skb_put(skb, packet->act_len + HTC_HDR_LENGTH); 1336 skb_pull(skb, HTC_HDR_LENGTH); 1337 1338 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "rx ", 1339 skb->data, skb->len); 1340 1341 if (ept == ar->ctrl_ep) { 1342 if (test_bit(WMI_ENABLED, &ar->flag)) { 1343 ath6kl_check_wow_status(ar); 1344 ath6kl_wmi_control_rx(ar->wmi, skb); 1345 return; 1346 } 1347 if_idx = 1348 wmi_cmd_hdr_get_if_idx((struct wmi_cmd_hdr *) skb->data); 1349 } else { 1350 if_idx = 1351 wmi_data_hdr_get_if_idx((struct wmi_data_hdr *) skb->data); 1352 } 1353 1354 vif = ath6kl_get_vif_by_index(ar, if_idx); 1355 if (!vif) { 1356 dev_kfree_skb(skb); 1357 return; 1358 } 1359 1360 /* 1361 * Take lock to protect buffer counts and adaptive power throughput 1362 * state. 1363 */ 1364 spin_lock_bh(&vif->if_lock); 1365 1366 vif->net_stats.rx_packets++; 1367 vif->net_stats.rx_bytes += packet->act_len; 1368 1369 spin_unlock_bh(&vif->if_lock); 1370 1371 skb->dev = vif->ndev; 1372 1373 if (!test_bit(WMI_ENABLED, &ar->flag)) { 1374 if (EPPING_ALIGNMENT_PAD > 0) 1375 skb_pull(skb, EPPING_ALIGNMENT_PAD); 1376 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1377 return; 1378 } 1379 1380 ath6kl_check_wow_status(ar); 1381 1382 min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) + 1383 sizeof(struct ath6kl_llc_snap_hdr); 1384 1385 dhdr = (struct wmi_data_hdr *) skb->data; 1386 1387 /* 1388 * In the case of AP mode we may receive NULL data frames 1389 * that do not have LLC hdr. They are 16 bytes in size. 1390 * Allow these frames in the AP mode. 1391 */ 1392 if (vif->nw_type != AP_NETWORK && 1393 ((packet->act_len < min_hdr_len) || 1394 (packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) { 1395 ath6kl_info("frame len is too short or too long\n"); 1396 vif->net_stats.rx_errors++; 1397 vif->net_stats.rx_length_errors++; 1398 dev_kfree_skb(skb); 1399 return; 1400 } 1401 1402 /* Get the Power save state of the STA */ 1403 if (vif->nw_type == AP_NETWORK) { 1404 meta_type = wmi_data_hdr_get_meta(dhdr); 1405 1406 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) & 1407 WMI_DATA_HDR_PS_MASK); 1408 1409 offset = sizeof(struct wmi_data_hdr); 1410 trig_state = !!(le16_to_cpu(dhdr->info3) & WMI_DATA_HDR_TRIG); 1411 1412 switch (meta_type) { 1413 case 0: 1414 break; 1415 case WMI_META_VERSION_1: 1416 offset += sizeof(struct wmi_rx_meta_v1); 1417 break; 1418 case WMI_META_VERSION_2: 1419 offset += sizeof(struct wmi_rx_meta_v2); 1420 break; 1421 default: 1422 break; 1423 } 1424 1425 datap = (struct ethhdr *) (skb->data + offset); 1426 conn = ath6kl_find_sta(vif, datap->h_source); 1427 1428 if (!conn) { 1429 dev_kfree_skb(skb); 1430 return; 1431 } 1432 1433 /* 1434 * If there is a change in PS state of the STA, 1435 * take appropriate steps: 1436 * 1437 * 1. If Sleep-->Awake, flush the psq for the STA 1438 * Clear the PVB for the STA. 1439 * 2. If Awake-->Sleep, Starting queueing frames 1440 * the STA. 1441 */ 1442 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP); 1443 1444 if (ps_state) 1445 conn->sta_flags |= STA_PS_SLEEP; 1446 else 1447 conn->sta_flags &= ~STA_PS_SLEEP; 1448 1449 /* Accept trigger only when the station is in sleep */ 1450 if ((conn->sta_flags & STA_PS_SLEEP) && trig_state) 1451 ath6kl_uapsd_trigger_frame_rx(vif, conn); 1452 1453 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) { 1454 if (!(conn->sta_flags & STA_PS_SLEEP)) { 1455 struct sk_buff *skbuff = NULL; 1456 bool is_apsdq_empty; 1457 struct ath6kl_mgmt_buff *mgmt; 1458 u8 idx; 1459 1460 spin_lock_bh(&conn->psq_lock); 1461 while (conn->mgmt_psq_len > 0) { 1462 mgmt = list_first_entry( 1463 &conn->mgmt_psq, 1464 struct ath6kl_mgmt_buff, 1465 list); 1466 list_del(&mgmt->list); 1467 conn->mgmt_psq_len--; 1468 spin_unlock_bh(&conn->psq_lock); 1469 idx = vif->fw_vif_idx; 1470 1471 ath6kl_wmi_send_mgmt_cmd(ar->wmi, 1472 idx, 1473 mgmt->id, 1474 mgmt->freq, 1475 mgmt->wait, 1476 mgmt->buf, 1477 mgmt->len, 1478 mgmt->no_cck); 1479 1480 kfree(mgmt); 1481 spin_lock_bh(&conn->psq_lock); 1482 } 1483 conn->mgmt_psq_len = 0; 1484 while ((skbuff = skb_dequeue(&conn->psq))) { 1485 spin_unlock_bh(&conn->psq_lock); 1486 ath6kl_data_tx(skbuff, vif->ndev); 1487 spin_lock_bh(&conn->psq_lock); 1488 } 1489 1490 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1491 while ((skbuff = skb_dequeue(&conn->apsdq))) { 1492 spin_unlock_bh(&conn->psq_lock); 1493 ath6kl_data_tx(skbuff, vif->ndev); 1494 spin_lock_bh(&conn->psq_lock); 1495 } 1496 spin_unlock_bh(&conn->psq_lock); 1497 1498 if (!is_apsdq_empty) 1499 ath6kl_wmi_set_apsd_bfrd_traf( 1500 ar->wmi, 1501 vif->fw_vif_idx, 1502 conn->aid, 0, 0); 1503 1504 /* Clear the PVB for this STA */ 1505 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, 1506 conn->aid, 0); 1507 } 1508 } 1509 1510 /* drop NULL data frames here */ 1511 if ((packet->act_len < min_hdr_len) || 1512 (packet->act_len > 1513 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) { 1514 dev_kfree_skb(skb); 1515 return; 1516 } 1517 } 1518 1519 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false; 1520 tid = wmi_data_hdr_get_up(dhdr); 1521 seq_no = wmi_data_hdr_get_seqno(dhdr); 1522 meta_type = wmi_data_hdr_get_meta(dhdr); 1523 dot11_hdr = wmi_data_hdr_get_dot11(dhdr); 1524 pad_before_data_start = 1525 (le16_to_cpu(dhdr->info3) >> WMI_DATA_HDR_PAD_BEFORE_DATA_SHIFT) 1526 & WMI_DATA_HDR_PAD_BEFORE_DATA_MASK; 1527 1528 skb_pull(skb, sizeof(struct wmi_data_hdr)); 1529 1530 switch (meta_type) { 1531 case WMI_META_VERSION_1: 1532 skb_pull(skb, sizeof(struct wmi_rx_meta_v1)); 1533 break; 1534 case WMI_META_VERSION_2: 1535 meta = (struct wmi_rx_meta_v2 *) skb->data; 1536 if (meta->csum_flags & 0x1) { 1537 skb->ip_summed = CHECKSUM_COMPLETE; 1538 skb->csum = (__force __wsum) meta->csum; 1539 } 1540 skb_pull(skb, sizeof(struct wmi_rx_meta_v2)); 1541 break; 1542 default: 1543 break; 1544 } 1545 1546 skb_pull(skb, pad_before_data_start); 1547 1548 if (dot11_hdr) 1549 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb); 1550 else if (!is_amsdu) 1551 status = ath6kl_wmi_dot3_2_dix(skb); 1552 1553 if (status) { 1554 /* 1555 * Drop frames that could not be processed (lack of 1556 * memory, etc.) 1557 */ 1558 dev_kfree_skb(skb); 1559 return; 1560 } 1561 1562 if (!(vif->ndev->flags & IFF_UP)) { 1563 dev_kfree_skb(skb); 1564 return; 1565 } 1566 1567 if (vif->nw_type == AP_NETWORK) { 1568 datap = (struct ethhdr *) skb->data; 1569 if (is_multicast_ether_addr(datap->h_dest)) 1570 /* 1571 * Bcast/Mcast frames should be sent to the 1572 * OS stack as well as on the air. 1573 */ 1574 skb1 = skb_copy(skb, GFP_ATOMIC); 1575 else { 1576 /* 1577 * Search for a connected STA with dstMac 1578 * as the Mac address. If found send the 1579 * frame to it on the air else send the 1580 * frame up the stack. 1581 */ 1582 conn = ath6kl_find_sta(vif, datap->h_dest); 1583 1584 if (conn && ar->intra_bss) { 1585 skb1 = skb; 1586 skb = NULL; 1587 } else if (conn && !ar->intra_bss) { 1588 dev_kfree_skb(skb); 1589 skb = NULL; 1590 } 1591 } 1592 if (skb1) 1593 ath6kl_data_tx(skb1, vif->ndev); 1594 1595 if (skb == NULL) { 1596 /* nothing to deliver up the stack */ 1597 return; 1598 } 1599 } 1600 1601 datap = (struct ethhdr *) skb->data; 1602 1603 if (is_unicast_ether_addr(datap->h_dest)) { 1604 if (vif->nw_type == AP_NETWORK) { 1605 conn = ath6kl_find_sta(vif, datap->h_source); 1606 if (!conn) 1607 return; 1608 aggr_conn = conn->aggr_conn; 1609 } else 1610 aggr_conn = vif->aggr_cntxt->aggr_conn; 1611 1612 if (aggr_process_recv_frm(aggr_conn, tid, seq_no, 1613 is_amsdu, skb)) { 1614 /* aggregation code will handle the skb */ 1615 return; 1616 } 1617 } else if (!is_broadcast_ether_addr(datap->h_dest)) 1618 vif->net_stats.multicast++; 1619 1620 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1621 } 1622 1623 static void aggr_timeout(unsigned long arg) 1624 { 1625 u8 i, j; 1626 struct aggr_info_conn *aggr_conn = (struct aggr_info_conn *) arg; 1627 struct rxtid *rxtid; 1628 struct rxtid_stats *stats; 1629 1630 for (i = 0; i < NUM_OF_TIDS; i++) { 1631 rxtid = &aggr_conn->rx_tid[i]; 1632 stats = &aggr_conn->stat[i]; 1633 1634 if (!rxtid->aggr || !rxtid->timer_mon) 1635 continue; 1636 1637 stats->num_timeouts++; 1638 ath6kl_dbg(ATH6KL_DBG_AGGR, 1639 "aggr timeout (st %d end %d)\n", 1640 rxtid->seq_next, 1641 ((rxtid->seq_next + rxtid->hold_q_sz-1) & 1642 ATH6KL_MAX_SEQ_NO)); 1643 aggr_deque_frms(aggr_conn, i, 0, 0); 1644 } 1645 1646 aggr_conn->timer_scheduled = false; 1647 1648 for (i = 0; i < NUM_OF_TIDS; i++) { 1649 rxtid = &aggr_conn->rx_tid[i]; 1650 1651 if (rxtid->aggr && rxtid->hold_q) { 1652 spin_lock_bh(&rxtid->lock); 1653 for (j = 0; j < rxtid->hold_q_sz; j++) { 1654 if (rxtid->hold_q[j].skb) { 1655 aggr_conn->timer_scheduled = true; 1656 rxtid->timer_mon = true; 1657 break; 1658 } 1659 } 1660 spin_unlock_bh(&rxtid->lock); 1661 1662 if (j >= rxtid->hold_q_sz) 1663 rxtid->timer_mon = false; 1664 } 1665 } 1666 1667 if (aggr_conn->timer_scheduled) 1668 mod_timer(&aggr_conn->timer, 1669 jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT)); 1670 } 1671 1672 static void aggr_delete_tid_state(struct aggr_info_conn *aggr_conn, u8 tid) 1673 { 1674 struct rxtid *rxtid; 1675 struct rxtid_stats *stats; 1676 1677 if (!aggr_conn || tid >= NUM_OF_TIDS) 1678 return; 1679 1680 rxtid = &aggr_conn->rx_tid[tid]; 1681 stats = &aggr_conn->stat[tid]; 1682 1683 if (rxtid->aggr) 1684 aggr_deque_frms(aggr_conn, tid, 0, 0); 1685 1686 rxtid->aggr = false; 1687 rxtid->timer_mon = false; 1688 rxtid->win_sz = 0; 1689 rxtid->seq_next = 0; 1690 rxtid->hold_q_sz = 0; 1691 1692 kfree(rxtid->hold_q); 1693 rxtid->hold_q = NULL; 1694 1695 memset(stats, 0, sizeof(struct rxtid_stats)); 1696 } 1697 1698 void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid_mux, u16 seq_no, 1699 u8 win_sz) 1700 { 1701 struct ath6kl_sta *sta; 1702 struct aggr_info_conn *aggr_conn = NULL; 1703 struct rxtid *rxtid; 1704 struct rxtid_stats *stats; 1705 u16 hold_q_size; 1706 u8 tid, aid; 1707 1708 if (vif->nw_type == AP_NETWORK) { 1709 aid = ath6kl_get_aid(tid_mux); 1710 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1711 if (sta) 1712 aggr_conn = sta->aggr_conn; 1713 } else 1714 aggr_conn = vif->aggr_cntxt->aggr_conn; 1715 1716 if (!aggr_conn) 1717 return; 1718 1719 tid = ath6kl_get_tid(tid_mux); 1720 if (tid >= NUM_OF_TIDS) 1721 return; 1722 1723 rxtid = &aggr_conn->rx_tid[tid]; 1724 stats = &aggr_conn->stat[tid]; 1725 1726 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX) 1727 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n", 1728 __func__, win_sz, tid); 1729 1730 if (rxtid->aggr) 1731 aggr_delete_tid_state(aggr_conn, tid); 1732 1733 rxtid->seq_next = seq_no; 1734 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q); 1735 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL); 1736 if (!rxtid->hold_q) 1737 return; 1738 1739 rxtid->win_sz = win_sz; 1740 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz); 1741 if (!skb_queue_empty(&rxtid->q)) 1742 return; 1743 1744 rxtid->aggr = true; 1745 } 1746 1747 void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info, 1748 struct aggr_info_conn *aggr_conn) 1749 { 1750 struct rxtid *rxtid; 1751 u8 i; 1752 1753 aggr_conn->aggr_sz = AGGR_SZ_DEFAULT; 1754 aggr_conn->dev = vif->ndev; 1755 init_timer(&aggr_conn->timer); 1756 aggr_conn->timer.function = aggr_timeout; 1757 aggr_conn->timer.data = (unsigned long) aggr_conn; 1758 aggr_conn->aggr_info = aggr_info; 1759 1760 aggr_conn->timer_scheduled = false; 1761 1762 for (i = 0; i < NUM_OF_TIDS; i++) { 1763 rxtid = &aggr_conn->rx_tid[i]; 1764 rxtid->aggr = false; 1765 rxtid->timer_mon = false; 1766 skb_queue_head_init(&rxtid->q); 1767 spin_lock_init(&rxtid->lock); 1768 } 1769 1770 } 1771 1772 struct aggr_info *aggr_init(struct ath6kl_vif *vif) 1773 { 1774 struct aggr_info *p_aggr = NULL; 1775 1776 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL); 1777 if (!p_aggr) { 1778 ath6kl_err("failed to alloc memory for aggr_node\n"); 1779 return NULL; 1780 } 1781 1782 p_aggr->aggr_conn = kzalloc(sizeof(struct aggr_info_conn), GFP_KERNEL); 1783 if (!p_aggr->aggr_conn) { 1784 ath6kl_err("failed to alloc memory for connection specific aggr info\n"); 1785 kfree(p_aggr); 1786 return NULL; 1787 } 1788 1789 aggr_conn_init(vif, p_aggr, p_aggr->aggr_conn); 1790 1791 skb_queue_head_init(&p_aggr->rx_amsdu_freeq); 1792 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, AGGR_NUM_OF_FREE_NETBUFS); 1793 1794 return p_aggr; 1795 } 1796 1797 void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid_mux) 1798 { 1799 struct ath6kl_sta *sta; 1800 struct rxtid *rxtid; 1801 struct aggr_info_conn *aggr_conn = NULL; 1802 u8 tid, aid; 1803 1804 if (vif->nw_type == AP_NETWORK) { 1805 aid = ath6kl_get_aid(tid_mux); 1806 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1807 if (sta) 1808 aggr_conn = sta->aggr_conn; 1809 } else 1810 aggr_conn = vif->aggr_cntxt->aggr_conn; 1811 1812 if (!aggr_conn) 1813 return; 1814 1815 tid = ath6kl_get_tid(tid_mux); 1816 if (tid >= NUM_OF_TIDS) 1817 return; 1818 1819 rxtid = &aggr_conn->rx_tid[tid]; 1820 1821 if (rxtid->aggr) 1822 aggr_delete_tid_state(aggr_conn, tid); 1823 } 1824 1825 void aggr_reset_state(struct aggr_info_conn *aggr_conn) 1826 { 1827 u8 tid; 1828 1829 if (!aggr_conn) 1830 return; 1831 1832 if (aggr_conn->timer_scheduled) { 1833 del_timer(&aggr_conn->timer); 1834 aggr_conn->timer_scheduled = false; 1835 } 1836 1837 for (tid = 0; tid < NUM_OF_TIDS; tid++) 1838 aggr_delete_tid_state(aggr_conn, tid); 1839 } 1840 1841 /* clean up our amsdu buffer list */ 1842 void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar) 1843 { 1844 struct htc_packet *packet, *tmp_pkt; 1845 1846 spin_lock_bh(&ar->lock); 1847 if (list_empty(&ar->amsdu_rx_buffer_queue)) { 1848 spin_unlock_bh(&ar->lock); 1849 return; 1850 } 1851 1852 list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue, 1853 list) { 1854 list_del(&packet->list); 1855 spin_unlock_bh(&ar->lock); 1856 dev_kfree_skb(packet->pkt_cntxt); 1857 spin_lock_bh(&ar->lock); 1858 } 1859 1860 spin_unlock_bh(&ar->lock); 1861 } 1862 1863 void aggr_module_destroy(struct aggr_info *aggr_info) 1864 { 1865 if (!aggr_info) 1866 return; 1867 1868 aggr_reset_state(aggr_info->aggr_conn); 1869 skb_queue_purge(&aggr_info->rx_amsdu_freeq); 1870 kfree(aggr_info->aggr_conn); 1871 kfree(aggr_info); 1872 } 1873