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 } 131 132 if (test_bit(WMM_ENABLED, &vif->flags)) { 133 ether_type = be16_to_cpu(datap->h_proto); 134 if (is_ethertype(ether_type)) { 135 /* packet is in DIX format */ 136 ip_hdr = (u8 *)(datap + 1); 137 } else { 138 /* packet is in 802.3 format */ 139 llc_hdr = (struct ath6kl_llc_snap_hdr *) 140 (datap + 1); 141 ether_type = be16_to_cpu(llc_hdr->eth_type); 142 ip_hdr = (u8 *)(llc_hdr + 1); 143 } 144 145 if (ether_type == IP_ETHERTYPE) 146 up = ath6kl_wmi_determine_user_priority( 147 ip_hdr, 0); 148 } 149 150 traffic_class = ath6kl_wmi_get_traffic_class(up); 151 152 if ((conn->apsd_info & (1 << traffic_class)) == 0) 153 return false; 154 155 /* Queue the frames if the STA is sleeping */ 156 spin_lock_bh(&conn->psq_lock); 157 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 158 skb_queue_tail(&conn->apsdq, skb); 159 spin_unlock_bh(&conn->psq_lock); 160 161 /* 162 * If this is the first pkt getting queued 163 * for this STA, update the PVB for this STA 164 */ 165 if (is_apsdq_empty) { 166 ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi, 167 vif->fw_vif_idx, 168 conn->aid, 1, 0); 169 } 170 *flags |= WMI_DATA_HDR_FLAGS_UAPSD; 171 172 return true; 173 } 174 175 static bool ath6kl_process_psq(struct ath6kl_sta *conn, 176 struct ath6kl_vif *vif, 177 struct sk_buff *skb, 178 u32 *flags) 179 { 180 bool is_psq_empty = false; 181 struct ath6kl *ar = vif->ar; 182 183 if (conn->sta_flags & STA_PS_POLLED) { 184 spin_lock_bh(&conn->psq_lock); 185 if (!skb_queue_empty(&conn->psq)) 186 *flags |= WMI_DATA_HDR_FLAGS_MORE; 187 spin_unlock_bh(&conn->psq_lock); 188 return false; 189 } 190 191 /* Queue the frames if the STA is sleeping */ 192 spin_lock_bh(&conn->psq_lock); 193 is_psq_empty = skb_queue_empty(&conn->psq); 194 skb_queue_tail(&conn->psq, skb); 195 spin_unlock_bh(&conn->psq_lock); 196 197 /* 198 * If this is the first pkt getting queued 199 * for this STA, update the PVB for this 200 * STA. 201 */ 202 if (is_psq_empty) 203 ath6kl_wmi_set_pvb_cmd(ar->wmi, 204 vif->fw_vif_idx, 205 conn->aid, 1); 206 return true; 207 } 208 209 static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb, 210 u32 *flags) 211 { 212 struct ethhdr *datap = (struct ethhdr *) skb->data; 213 struct ath6kl_sta *conn = NULL; 214 bool ps_queued = false; 215 struct ath6kl *ar = vif->ar; 216 217 if (is_multicast_ether_addr(datap->h_dest)) { 218 u8 ctr = 0; 219 bool q_mcast = false; 220 221 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) { 222 if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) { 223 q_mcast = true; 224 break; 225 } 226 } 227 228 if (q_mcast) { 229 /* 230 * If this transmit is not because of a Dtim Expiry 231 * q it. 232 */ 233 if (!test_bit(DTIM_EXPIRED, &vif->flags)) { 234 bool is_mcastq_empty = false; 235 236 spin_lock_bh(&ar->mcastpsq_lock); 237 is_mcastq_empty = 238 skb_queue_empty(&ar->mcastpsq); 239 skb_queue_tail(&ar->mcastpsq, skb); 240 spin_unlock_bh(&ar->mcastpsq_lock); 241 242 /* 243 * If this is the first Mcast pkt getting 244 * queued indicate to the target to set the 245 * BitmapControl LSB of the TIM IE. 246 */ 247 if (is_mcastq_empty) 248 ath6kl_wmi_set_pvb_cmd(ar->wmi, 249 vif->fw_vif_idx, 250 MCAST_AID, 1); 251 252 ps_queued = true; 253 } else { 254 /* 255 * This transmit is because of Dtim expiry. 256 * Determine if MoreData bit has to be set. 257 */ 258 spin_lock_bh(&ar->mcastpsq_lock); 259 if (!skb_queue_empty(&ar->mcastpsq)) 260 *flags |= WMI_DATA_HDR_FLAGS_MORE; 261 spin_unlock_bh(&ar->mcastpsq_lock); 262 } 263 } 264 } else { 265 conn = ath6kl_find_sta(vif, datap->h_dest); 266 if (!conn) { 267 dev_kfree_skb(skb); 268 269 /* Inform the caller that the skb is consumed */ 270 return true; 271 } 272 273 if (conn->sta_flags & STA_PS_SLEEP) { 274 ps_queued = ath6kl_process_uapsdq(conn, 275 vif, skb, flags); 276 if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD)) 277 ps_queued = ath6kl_process_psq(conn, 278 vif, skb, flags); 279 } 280 } 281 return ps_queued; 282 } 283 284 /* Tx functions */ 285 286 int ath6kl_control_tx(void *devt, struct sk_buff *skb, 287 enum htc_endpoint_id eid) 288 { 289 struct ath6kl *ar = devt; 290 int status = 0; 291 struct ath6kl_cookie *cookie = NULL; 292 293 trace_ath6kl_wmi_cmd(skb->data, skb->len); 294 295 if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW)) { 296 dev_kfree_skb(skb); 297 return -EACCES; 298 } 299 300 if (WARN_ON_ONCE(eid == ENDPOINT_UNUSED || 301 eid >= ENDPOINT_MAX)) { 302 status = -EINVAL; 303 goto fail_ctrl_tx; 304 } 305 306 spin_lock_bh(&ar->lock); 307 308 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 309 "%s: skb=0x%p, len=0x%x eid =%d\n", __func__, 310 skb, skb->len, eid); 311 312 if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) { 313 /* 314 * Control endpoint is full, don't allocate resources, we 315 * are just going to drop this packet. 316 */ 317 cookie = NULL; 318 ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n", 319 skb, skb->len); 320 } else { 321 cookie = ath6kl_alloc_cookie(ar); 322 } 323 324 if (cookie == NULL) { 325 spin_unlock_bh(&ar->lock); 326 status = -ENOMEM; 327 goto fail_ctrl_tx; 328 } 329 330 ar->tx_pending[eid]++; 331 332 if (eid != ar->ctrl_ep) 333 ar->total_tx_data_pend++; 334 335 spin_unlock_bh(&ar->lock); 336 337 cookie->skb = skb; 338 cookie->map_no = 0; 339 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 340 eid, ATH6KL_CONTROL_PKT_TAG); 341 cookie->htc_pkt.skb = skb; 342 343 /* 344 * This interface is asynchronous, if there is an error, cleanup 345 * will happen in the TX completion callback. 346 */ 347 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 348 349 return 0; 350 351 fail_ctrl_tx: 352 dev_kfree_skb(skb); 353 return status; 354 } 355 356 netdev_tx_t ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev) 357 { 358 struct ath6kl *ar = ath6kl_priv(dev); 359 struct ath6kl_cookie *cookie = NULL; 360 enum htc_endpoint_id eid = ENDPOINT_UNUSED; 361 struct ath6kl_vif *vif = netdev_priv(dev); 362 u32 map_no = 0; 363 u16 htc_tag = ATH6KL_DATA_PKT_TAG; 364 u8 ac = 99; /* initialize to unmapped ac */ 365 bool chk_adhoc_ps_mapping = false; 366 int ret; 367 struct wmi_tx_meta_v2 meta_v2; 368 void *meta; 369 u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed; 370 u8 meta_ver = 0; 371 u32 flags = 0; 372 373 ath6kl_dbg(ATH6KL_DBG_WLAN_TX, 374 "%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__, 375 skb, skb->data, skb->len); 376 377 /* If target is not associated */ 378 if (!test_bit(CONNECTED, &vif->flags)) 379 goto fail_tx; 380 381 if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON)) 382 goto fail_tx; 383 384 if (!test_bit(WMI_READY, &ar->flag)) 385 goto fail_tx; 386 387 /* AP mode Power saving processing */ 388 if (vif->nw_type == AP_NETWORK) { 389 if (ath6kl_powersave_ap(vif, skb, &flags)) 390 return 0; 391 } 392 393 if (test_bit(WMI_ENABLED, &ar->flag)) { 394 if ((dev->features & NETIF_F_IP_CSUM) && 395 (csum == CHECKSUM_PARTIAL)) { 396 csum_start = skb->csum_start - 397 (skb_network_header(skb) - skb->head) + 398 sizeof(struct ath6kl_llc_snap_hdr); 399 csum_dest = skb->csum_offset + csum_start; 400 } 401 402 if (skb_cow_head(skb, dev->needed_headroom)) { 403 dev->stats.tx_dropped++; 404 kfree_skb(skb); 405 return 0; 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 } 452 453 spin_lock_bh(&ar->lock); 454 455 if (chk_adhoc_ps_mapping) 456 eid = ath6kl_ibss_map_epid(skb, dev, &map_no); 457 else 458 eid = ar->ac2ep_map[ac]; 459 460 if (eid == 0 || eid == ENDPOINT_UNUSED) { 461 ath6kl_err("eid %d is not mapped!\n", eid); 462 spin_unlock_bh(&ar->lock); 463 goto fail_tx; 464 } 465 466 /* allocate resource for this packet */ 467 cookie = ath6kl_alloc_cookie(ar); 468 469 if (!cookie) { 470 spin_unlock_bh(&ar->lock); 471 goto fail_tx; 472 } 473 474 /* update counts while the lock is held */ 475 ar->tx_pending[eid]++; 476 ar->total_tx_data_pend++; 477 478 spin_unlock_bh(&ar->lock); 479 480 if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) && 481 skb_cloned(skb)) { 482 /* 483 * We will touch (move the buffer data to align it. Since the 484 * skb buffer is cloned and not only the header is changed, we 485 * have to copy it to allow the changes. Since we are copying 486 * the data here, we may as well align it by reserving suitable 487 * headroom to avoid the memmove in ath6kl_htc_tx_buf_align(). 488 */ 489 struct sk_buff *nskb; 490 491 nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC); 492 if (nskb == NULL) 493 goto fail_tx; 494 kfree_skb(skb); 495 skb = nskb; 496 } 497 498 cookie->skb = skb; 499 cookie->map_no = map_no; 500 set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len, 501 eid, htc_tag); 502 cookie->htc_pkt.skb = skb; 503 504 ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ", 505 skb->data, skb->len); 506 507 /* 508 * HTC interface is asynchronous, if this fails, cleanup will 509 * happen in the ath6kl_tx_complete callback. 510 */ 511 ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt); 512 513 return 0; 514 515 fail_tx: 516 dev_kfree_skb(skb); 517 518 dev->stats.tx_dropped++; 519 dev->stats.tx_aborted_errors++; 520 521 return 0; 522 } 523 524 /* indicate tx activity or inactivity on a WMI stream */ 525 void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active) 526 { 527 struct ath6kl *ar = devt; 528 enum htc_endpoint_id eid; 529 int i; 530 531 eid = ar->ac2ep_map[traffic_class]; 532 533 if (!test_bit(WMI_ENABLED, &ar->flag)) 534 goto notify_htc; 535 536 spin_lock_bh(&ar->lock); 537 538 ar->ac_stream_active[traffic_class] = active; 539 540 if (active) { 541 /* 542 * Keep track of the active stream with the highest 543 * priority. 544 */ 545 if (ar->ac_stream_pri_map[traffic_class] > 546 ar->hiac_stream_active_pri) 547 /* set the new highest active priority */ 548 ar->hiac_stream_active_pri = 549 ar->ac_stream_pri_map[traffic_class]; 550 551 } else { 552 /* 553 * We may have to search for the next active stream 554 * that is the highest priority. 555 */ 556 if (ar->hiac_stream_active_pri == 557 ar->ac_stream_pri_map[traffic_class]) { 558 /* 559 * The highest priority stream just went inactive 560 * reset and search for the "next" highest "active" 561 * priority stream. 562 */ 563 ar->hiac_stream_active_pri = 0; 564 565 for (i = 0; i < WMM_NUM_AC; i++) { 566 if (ar->ac_stream_active[i] && 567 (ar->ac_stream_pri_map[i] > 568 ar->hiac_stream_active_pri)) 569 /* 570 * Set the new highest active 571 * priority. 572 */ 573 ar->hiac_stream_active_pri = 574 ar->ac_stream_pri_map[i]; 575 } 576 } 577 } 578 579 spin_unlock_bh(&ar->lock); 580 581 notify_htc: 582 /* notify HTC, this may cause credit distribution changes */ 583 ath6kl_htc_activity_changed(ar->htc_target, eid, active); 584 } 585 586 enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target, 587 struct htc_packet *packet) 588 { 589 struct ath6kl *ar = target->dev->ar; 590 struct ath6kl_vif *vif; 591 enum htc_endpoint_id endpoint = packet->endpoint; 592 enum htc_send_full_action action = HTC_SEND_FULL_KEEP; 593 594 if (endpoint == ar->ctrl_ep) { 595 /* 596 * Under normal WMI if this is getting full, then something 597 * is running rampant the host should not be exhausting the 598 * WMI queue with too many commands the only exception to 599 * this is during testing using endpointping. 600 */ 601 set_bit(WMI_CTRL_EP_FULL, &ar->flag); 602 ath6kl_err("wmi ctrl ep is full\n"); 603 ath6kl_recovery_err_notify(ar, ATH6KL_FW_EP_FULL); 604 return action; 605 } 606 607 if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG) 608 return action; 609 610 /* 611 * The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for 612 * the highest active stream. 613 */ 614 if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] < 615 ar->hiac_stream_active_pri && 616 ar->cookie_count <= 617 target->endpoint[endpoint].tx_drop_packet_threshold) 618 /* 619 * Give preference to the highest priority stream by 620 * dropping the packets which overflowed. 621 */ 622 action = HTC_SEND_FULL_DROP; 623 624 /* FIXME: Locking */ 625 spin_lock_bh(&ar->list_lock); 626 list_for_each_entry(vif, &ar->vif_list, list) { 627 if (vif->nw_type == ADHOC_NETWORK || 628 action != HTC_SEND_FULL_DROP) { 629 spin_unlock_bh(&ar->list_lock); 630 631 set_bit(NETQ_STOPPED, &vif->flags); 632 netif_stop_queue(vif->ndev); 633 634 return action; 635 } 636 } 637 spin_unlock_bh(&ar->list_lock); 638 639 return action; 640 } 641 642 /* TODO this needs to be looked at */ 643 static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif, 644 enum htc_endpoint_id eid, u32 map_no) 645 { 646 struct ath6kl *ar = vif->ar; 647 u32 i; 648 649 if (vif->nw_type != ADHOC_NETWORK) 650 return; 651 652 if (!ar->ibss_ps_enable) 653 return; 654 655 if (eid == ar->ctrl_ep) 656 return; 657 658 if (map_no == 0) 659 return; 660 661 map_no--; 662 ar->node_map[map_no].tx_pend--; 663 664 if (ar->node_map[map_no].tx_pend) 665 return; 666 667 if (map_no != (ar->node_num - 1)) 668 return; 669 670 for (i = ar->node_num; i > 0; i--) { 671 if (ar->node_map[i - 1].tx_pend) 672 break; 673 674 memset(&ar->node_map[i - 1], 0, 675 sizeof(struct ath6kl_node_mapping)); 676 ar->node_num--; 677 } 678 } 679 680 void ath6kl_tx_complete(struct htc_target *target, 681 struct list_head *packet_queue) 682 { 683 struct ath6kl *ar = target->dev->ar; 684 struct sk_buff_head skb_queue; 685 struct htc_packet *packet; 686 struct sk_buff *skb; 687 struct ath6kl_cookie *ath6kl_cookie; 688 u32 map_no = 0; 689 int status; 690 enum htc_endpoint_id eid; 691 bool wake_event = false; 692 bool flushing[ATH6KL_VIF_MAX] = {false}; 693 u8 if_idx; 694 struct ath6kl_vif *vif; 695 696 skb_queue_head_init(&skb_queue); 697 698 /* lock the driver as we update internal state */ 699 spin_lock_bh(&ar->lock); 700 701 /* reap completed packets */ 702 while (!list_empty(packet_queue)) { 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->ndev->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->ndev->stats.tx_packets++; 782 vif->ndev->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(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 = be16_to_cpu(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 1093 rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next); 1094 idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz); 1095 } while (idx != idx_end); 1096 1097 spin_unlock_bh(&rxtid->lock); 1098 1099 stats->num_delivered += skb_queue_len(&rxtid->q); 1100 1101 while ((skb = skb_dequeue(&rxtid->q))) 1102 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, skb); 1103 } 1104 1105 static bool aggr_process_recv_frm(struct aggr_info_conn *agg_conn, u8 tid, 1106 u16 seq_no, 1107 bool is_amsdu, struct sk_buff *frame) 1108 { 1109 struct rxtid *rxtid; 1110 struct rxtid_stats *stats; 1111 struct sk_buff *skb; 1112 struct skb_hold_q *node; 1113 u16 idx, st, cur, end; 1114 bool is_queued = false; 1115 u16 extended_end; 1116 1117 rxtid = &agg_conn->rx_tid[tid]; 1118 stats = &agg_conn->stat[tid]; 1119 1120 stats->num_into_aggr++; 1121 1122 if (!rxtid->aggr) { 1123 if (is_amsdu) { 1124 aggr_slice_amsdu(agg_conn->aggr_info, rxtid, frame); 1125 is_queued = true; 1126 stats->num_amsdu++; 1127 while ((skb = skb_dequeue(&rxtid->q))) 1128 ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, 1129 skb); 1130 } 1131 return is_queued; 1132 } 1133 1134 /* Check the incoming sequence no, if it's in the window */ 1135 st = rxtid->seq_next; 1136 cur = seq_no; 1137 end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO; 1138 1139 if (((st < end) && (cur < st || cur > end)) || 1140 ((st > end) && (cur > end) && (cur < st))) { 1141 extended_end = (end + rxtid->hold_q_sz - 1) & 1142 ATH6KL_MAX_SEQ_NO; 1143 1144 if (((end < extended_end) && 1145 (cur < end || cur > extended_end)) || 1146 ((end > extended_end) && (cur > extended_end) && 1147 (cur < end))) { 1148 aggr_deque_frms(agg_conn, tid, 0, 0); 1149 spin_lock_bh(&rxtid->lock); 1150 if (cur >= rxtid->hold_q_sz - 1) 1151 rxtid->seq_next = cur - (rxtid->hold_q_sz - 1); 1152 else 1153 rxtid->seq_next = ATH6KL_MAX_SEQ_NO - 1154 (rxtid->hold_q_sz - 2 - cur); 1155 spin_unlock_bh(&rxtid->lock); 1156 } else { 1157 /* 1158 * Dequeue only those frames that are outside the 1159 * new shifted window. 1160 */ 1161 if (cur >= rxtid->hold_q_sz - 1) 1162 st = cur - (rxtid->hold_q_sz - 1); 1163 else 1164 st = ATH6KL_MAX_SEQ_NO - 1165 (rxtid->hold_q_sz - 2 - cur); 1166 1167 aggr_deque_frms(agg_conn, tid, st, 0); 1168 } 1169 1170 stats->num_oow++; 1171 } 1172 1173 idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz); 1174 1175 node = &rxtid->hold_q[idx]; 1176 1177 spin_lock_bh(&rxtid->lock); 1178 1179 /* 1180 * Is the cur frame duplicate or something beyond our window(hold_q 1181 * -> which is 2x, already)? 1182 * 1183 * 1. Duplicate is easy - drop incoming frame. 1184 * 2. Not falling in current sliding window. 1185 * 2a. is the frame_seq_no preceding current tid_seq_no? 1186 * -> drop the frame. perhaps sender did not get our ACK. 1187 * this is taken care of above. 1188 * 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ); 1189 * -> Taken care of it above, by moving window forward. 1190 */ 1191 dev_kfree_skb(node->skb); 1192 stats->num_dups++; 1193 1194 node->skb = frame; 1195 is_queued = true; 1196 node->is_amsdu = is_amsdu; 1197 node->seq_no = seq_no; 1198 1199 if (node->is_amsdu) 1200 stats->num_amsdu++; 1201 else 1202 stats->num_mpdu++; 1203 1204 spin_unlock_bh(&rxtid->lock); 1205 1206 aggr_deque_frms(agg_conn, tid, 0, 1); 1207 1208 if (agg_conn->timer_scheduled) 1209 return is_queued; 1210 1211 spin_lock_bh(&rxtid->lock); 1212 for (idx = 0; idx < rxtid->hold_q_sz; idx++) { 1213 if (rxtid->hold_q[idx].skb) { 1214 /* 1215 * There is a frame in the queue and no 1216 * timer so start a timer to ensure that 1217 * the frame doesn't remain stuck 1218 * forever. 1219 */ 1220 agg_conn->timer_scheduled = true; 1221 mod_timer(&agg_conn->timer, 1222 (jiffies + (HZ * AGGR_RX_TIMEOUT) / 1000)); 1223 rxtid->timer_mon = true; 1224 break; 1225 } 1226 } 1227 spin_unlock_bh(&rxtid->lock); 1228 1229 return is_queued; 1230 } 1231 1232 static void ath6kl_uapsd_trigger_frame_rx(struct ath6kl_vif *vif, 1233 struct ath6kl_sta *conn) 1234 { 1235 struct ath6kl *ar = vif->ar; 1236 bool is_apsdq_empty, is_apsdq_empty_at_start; 1237 u32 num_frames_to_deliver, flags; 1238 struct sk_buff *skb = NULL; 1239 1240 /* 1241 * If the APSD q for this STA is not empty, dequeue and 1242 * send a pkt from the head of the q. Also update the 1243 * More data bit in the WMI_DATA_HDR if there are 1244 * more pkts for this STA in the APSD q. 1245 * If there are no more pkts for this STA, 1246 * update the APSD bitmap for this STA. 1247 */ 1248 1249 num_frames_to_deliver = (conn->apsd_info >> ATH6KL_APSD_NUM_OF_AC) & 1250 ATH6KL_APSD_FRAME_MASK; 1251 /* 1252 * Number of frames to send in a service period is 1253 * indicated by the station 1254 * in the QOS_INFO of the association request 1255 * If it is zero, send all frames 1256 */ 1257 if (!num_frames_to_deliver) 1258 num_frames_to_deliver = ATH6KL_APSD_ALL_FRAME; 1259 1260 spin_lock_bh(&conn->psq_lock); 1261 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1262 spin_unlock_bh(&conn->psq_lock); 1263 is_apsdq_empty_at_start = is_apsdq_empty; 1264 1265 while ((!is_apsdq_empty) && (num_frames_to_deliver)) { 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 || packet->act_len < 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->ndev->stats.rx_packets++; 1364 vif->ndev->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->ndev->stats.rx_errors++; 1394 vif->ndev->stats.rx_length_errors++; 1395 dev_kfree_skb(skb); 1396 return; 1397 } 1398 1399 pad_before_data_start = 1400 (le16_to_cpu(dhdr->info3) >> WMI_DATA_HDR_PAD_BEFORE_DATA_SHIFT) 1401 & WMI_DATA_HDR_PAD_BEFORE_DATA_MASK; 1402 1403 /* Get the Power save state of the STA */ 1404 if (vif->nw_type == AP_NETWORK) { 1405 meta_type = wmi_data_hdr_get_meta(dhdr); 1406 1407 ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) & 1408 WMI_DATA_HDR_PS_MASK); 1409 1410 offset = sizeof(struct wmi_data_hdr) + pad_before_data_start; 1411 trig_state = !!(le16_to_cpu(dhdr->info3) & WMI_DATA_HDR_TRIG); 1412 1413 switch (meta_type) { 1414 case 0: 1415 break; 1416 case WMI_META_VERSION_1: 1417 offset += sizeof(struct wmi_rx_meta_v1); 1418 break; 1419 case WMI_META_VERSION_2: 1420 offset += sizeof(struct wmi_rx_meta_v2); 1421 break; 1422 default: 1423 break; 1424 } 1425 1426 datap = (struct ethhdr *) (skb->data + offset); 1427 conn = ath6kl_find_sta(vif, datap->h_source); 1428 1429 if (!conn) { 1430 dev_kfree_skb(skb); 1431 return; 1432 } 1433 1434 /* 1435 * If there is a change in PS state of the STA, 1436 * take appropriate steps: 1437 * 1438 * 1. If Sleep-->Awake, flush the psq for the STA 1439 * Clear the PVB for the STA. 1440 * 2. If Awake-->Sleep, Starting queueing frames 1441 * the STA. 1442 */ 1443 prev_ps = !!(conn->sta_flags & STA_PS_SLEEP); 1444 1445 if (ps_state) 1446 conn->sta_flags |= STA_PS_SLEEP; 1447 else 1448 conn->sta_flags &= ~STA_PS_SLEEP; 1449 1450 /* Accept trigger only when the station is in sleep */ 1451 if ((conn->sta_flags & STA_PS_SLEEP) && trig_state) 1452 ath6kl_uapsd_trigger_frame_rx(vif, conn); 1453 1454 if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) { 1455 if (!(conn->sta_flags & STA_PS_SLEEP)) { 1456 struct sk_buff *skbuff = NULL; 1457 bool is_apsdq_empty; 1458 struct ath6kl_mgmt_buff *mgmt; 1459 u8 idx; 1460 1461 spin_lock_bh(&conn->psq_lock); 1462 while (conn->mgmt_psq_len > 0) { 1463 mgmt = list_first_entry( 1464 &conn->mgmt_psq, 1465 struct ath6kl_mgmt_buff, 1466 list); 1467 list_del(&mgmt->list); 1468 conn->mgmt_psq_len--; 1469 spin_unlock_bh(&conn->psq_lock); 1470 idx = vif->fw_vif_idx; 1471 1472 ath6kl_wmi_send_mgmt_cmd(ar->wmi, 1473 idx, 1474 mgmt->id, 1475 mgmt->freq, 1476 mgmt->wait, 1477 mgmt->buf, 1478 mgmt->len, 1479 mgmt->no_cck); 1480 1481 kfree(mgmt); 1482 spin_lock_bh(&conn->psq_lock); 1483 } 1484 conn->mgmt_psq_len = 0; 1485 while ((skbuff = skb_dequeue(&conn->psq))) { 1486 spin_unlock_bh(&conn->psq_lock); 1487 ath6kl_data_tx(skbuff, vif->ndev); 1488 spin_lock_bh(&conn->psq_lock); 1489 } 1490 1491 is_apsdq_empty = skb_queue_empty(&conn->apsdq); 1492 while ((skbuff = skb_dequeue(&conn->apsdq))) { 1493 spin_unlock_bh(&conn->psq_lock); 1494 ath6kl_data_tx(skbuff, vif->ndev); 1495 spin_lock_bh(&conn->psq_lock); 1496 } 1497 spin_unlock_bh(&conn->psq_lock); 1498 1499 if (!is_apsdq_empty) 1500 ath6kl_wmi_set_apsd_bfrd_traf( 1501 ar->wmi, 1502 vif->fw_vif_idx, 1503 conn->aid, 0, 0); 1504 1505 /* Clear the PVB for this STA */ 1506 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, 1507 conn->aid, 0); 1508 } 1509 } 1510 1511 /* drop NULL data frames here */ 1512 if ((packet->act_len < min_hdr_len) || 1513 (packet->act_len > 1514 WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) { 1515 dev_kfree_skb(skb); 1516 return; 1517 } 1518 } 1519 1520 is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false; 1521 tid = wmi_data_hdr_get_up(dhdr); 1522 seq_no = wmi_data_hdr_get_seqno(dhdr); 1523 meta_type = wmi_data_hdr_get_meta(dhdr); 1524 dot11_hdr = wmi_data_hdr_get_dot11(dhdr); 1525 1526 skb_pull(skb, sizeof(struct wmi_data_hdr)); 1527 1528 switch (meta_type) { 1529 case WMI_META_VERSION_1: 1530 skb_pull(skb, sizeof(struct wmi_rx_meta_v1)); 1531 break; 1532 case WMI_META_VERSION_2: 1533 meta = (struct wmi_rx_meta_v2 *) skb->data; 1534 if (meta->csum_flags & 0x1) { 1535 skb->ip_summed = CHECKSUM_COMPLETE; 1536 skb->csum = (__force __wsum) meta->csum; 1537 } 1538 skb_pull(skb, sizeof(struct wmi_rx_meta_v2)); 1539 break; 1540 default: 1541 break; 1542 } 1543 1544 skb_pull(skb, pad_before_data_start); 1545 1546 if (dot11_hdr) 1547 status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb); 1548 else if (!is_amsdu) 1549 status = ath6kl_wmi_dot3_2_dix(skb); 1550 1551 if (status) { 1552 /* 1553 * Drop frames that could not be processed (lack of 1554 * memory, etc.) 1555 */ 1556 dev_kfree_skb(skb); 1557 return; 1558 } 1559 1560 if (!(vif->ndev->flags & IFF_UP)) { 1561 dev_kfree_skb(skb); 1562 return; 1563 } 1564 1565 if (vif->nw_type == AP_NETWORK) { 1566 datap = (struct ethhdr *) skb->data; 1567 if (is_multicast_ether_addr(datap->h_dest)) 1568 /* 1569 * Bcast/Mcast frames should be sent to the 1570 * OS stack as well as on the air. 1571 */ 1572 skb1 = skb_copy(skb, GFP_ATOMIC); 1573 else { 1574 /* 1575 * Search for a connected STA with dstMac 1576 * as the Mac address. If found send the 1577 * frame to it on the air else send the 1578 * frame up the stack. 1579 */ 1580 conn = ath6kl_find_sta(vif, datap->h_dest); 1581 1582 if (conn && ar->intra_bss) { 1583 skb1 = skb; 1584 skb = NULL; 1585 } else if (conn && !ar->intra_bss) { 1586 dev_kfree_skb(skb); 1587 skb = NULL; 1588 } 1589 } 1590 if (skb1) 1591 ath6kl_data_tx(skb1, vif->ndev); 1592 1593 if (skb == NULL) { 1594 /* nothing to deliver up the stack */ 1595 return; 1596 } 1597 } 1598 1599 datap = (struct ethhdr *) skb->data; 1600 1601 if (is_unicast_ether_addr(datap->h_dest)) { 1602 if (vif->nw_type == AP_NETWORK) { 1603 conn = ath6kl_find_sta(vif, datap->h_source); 1604 if (!conn) 1605 return; 1606 aggr_conn = conn->aggr_conn; 1607 } else { 1608 aggr_conn = vif->aggr_cntxt->aggr_conn; 1609 } 1610 1611 if (aggr_process_recv_frm(aggr_conn, tid, seq_no, 1612 is_amsdu, skb)) { 1613 /* aggregation code will handle the skb */ 1614 return; 1615 } 1616 } else if (!is_broadcast_ether_addr(datap->h_dest)) { 1617 vif->ndev->stats.multicast++; 1618 } 1619 1620 ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb); 1621 } 1622 1623 static void aggr_timeout(struct timer_list *t) 1624 { 1625 u8 i, j; 1626 struct aggr_info_conn *aggr_conn = from_timer(aggr_conn, t, timer); 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 u16 hold_q_size; 1705 u8 tid, aid; 1706 1707 if (vif->nw_type == AP_NETWORK) { 1708 aid = ath6kl_get_aid(tid_mux); 1709 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1710 if (sta) 1711 aggr_conn = sta->aggr_conn; 1712 } else { 1713 aggr_conn = vif->aggr_cntxt->aggr_conn; 1714 } 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 1725 if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX) 1726 ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n", 1727 __func__, win_sz, tid); 1728 1729 if (rxtid->aggr) 1730 aggr_delete_tid_state(aggr_conn, tid); 1731 1732 rxtid->seq_next = seq_no; 1733 hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q); 1734 rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL); 1735 if (!rxtid->hold_q) 1736 return; 1737 1738 rxtid->win_sz = win_sz; 1739 rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz); 1740 if (!skb_queue_empty(&rxtid->q)) 1741 return; 1742 1743 rxtid->aggr = true; 1744 } 1745 1746 void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info, 1747 struct aggr_info_conn *aggr_conn) 1748 { 1749 struct rxtid *rxtid; 1750 u8 i; 1751 1752 aggr_conn->aggr_sz = AGGR_SZ_DEFAULT; 1753 aggr_conn->dev = vif->ndev; 1754 timer_setup(&aggr_conn->timer, aggr_timeout, 0); 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 struct aggr_info *aggr_init(struct ath6kl_vif *vif) 1769 { 1770 struct aggr_info *p_aggr = NULL; 1771 1772 p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL); 1773 if (!p_aggr) { 1774 ath6kl_err("failed to alloc memory for aggr_node\n"); 1775 return NULL; 1776 } 1777 1778 p_aggr->aggr_conn = kzalloc(sizeof(struct aggr_info_conn), GFP_KERNEL); 1779 if (!p_aggr->aggr_conn) { 1780 ath6kl_err("failed to alloc memory for connection specific aggr info\n"); 1781 kfree(p_aggr); 1782 return NULL; 1783 } 1784 1785 aggr_conn_init(vif, p_aggr, p_aggr->aggr_conn); 1786 1787 skb_queue_head_init(&p_aggr->rx_amsdu_freeq); 1788 ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, AGGR_NUM_OF_FREE_NETBUFS); 1789 1790 return p_aggr; 1791 } 1792 1793 void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid_mux) 1794 { 1795 struct ath6kl_sta *sta; 1796 struct rxtid *rxtid; 1797 struct aggr_info_conn *aggr_conn = NULL; 1798 u8 tid, aid; 1799 1800 if (vif->nw_type == AP_NETWORK) { 1801 aid = ath6kl_get_aid(tid_mux); 1802 sta = ath6kl_find_sta_by_aid(vif->ar, aid); 1803 if (sta) 1804 aggr_conn = sta->aggr_conn; 1805 } else { 1806 aggr_conn = vif->aggr_cntxt->aggr_conn; 1807 } 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