1 /* 2 * Copyright (c) 2010-2011 Atheros Communications Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "htc.h" 18 19 /******/ 20 /* TX */ 21 /******/ 22 23 static const int subtype_txq_to_hwq[] = { 24 [IEEE80211_AC_BE] = ATH_TXQ_AC_BE, 25 [IEEE80211_AC_BK] = ATH_TXQ_AC_BK, 26 [IEEE80211_AC_VI] = ATH_TXQ_AC_VI, 27 [IEEE80211_AC_VO] = ATH_TXQ_AC_VO, 28 }; 29 30 #define ATH9K_HTC_INIT_TXQ(subtype) do { \ 31 qi.tqi_subtype = subtype_txq_to_hwq[subtype]; \ 32 qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; \ 33 qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; \ 34 qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; \ 35 qi.tqi_physCompBuf = 0; \ 36 qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | \ 37 TXQ_FLAG_TXDESCINT_ENABLE; \ 38 } while (0) 39 40 int get_hw_qnum(u16 queue, int *hwq_map) 41 { 42 switch (queue) { 43 case 0: 44 return hwq_map[IEEE80211_AC_VO]; 45 case 1: 46 return hwq_map[IEEE80211_AC_VI]; 47 case 2: 48 return hwq_map[IEEE80211_AC_BE]; 49 case 3: 50 return hwq_map[IEEE80211_AC_BK]; 51 default: 52 return hwq_map[IEEE80211_AC_BE]; 53 } 54 } 55 56 void ath9k_htc_check_stop_queues(struct ath9k_htc_priv *priv) 57 { 58 spin_lock_bh(&priv->tx.tx_lock); 59 priv->tx.queued_cnt++; 60 if ((priv->tx.queued_cnt >= ATH9K_HTC_TX_THRESHOLD) && 61 !(priv->tx.flags & ATH9K_HTC_OP_TX_QUEUES_STOP)) { 62 priv->tx.flags |= ATH9K_HTC_OP_TX_QUEUES_STOP; 63 ieee80211_stop_queues(priv->hw); 64 } 65 spin_unlock_bh(&priv->tx.tx_lock); 66 } 67 68 void ath9k_htc_check_wake_queues(struct ath9k_htc_priv *priv) 69 { 70 spin_lock_bh(&priv->tx.tx_lock); 71 if ((priv->tx.queued_cnt < ATH9K_HTC_TX_THRESHOLD) && 72 (priv->tx.flags & ATH9K_HTC_OP_TX_QUEUES_STOP)) { 73 priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP; 74 ieee80211_wake_queues(priv->hw); 75 } 76 spin_unlock_bh(&priv->tx.tx_lock); 77 } 78 79 int ath9k_htc_tx_get_slot(struct ath9k_htc_priv *priv) 80 { 81 int slot; 82 83 spin_lock_bh(&priv->tx.tx_lock); 84 slot = find_first_zero_bit(priv->tx.tx_slot, MAX_TX_BUF_NUM); 85 if (slot >= MAX_TX_BUF_NUM) { 86 spin_unlock_bh(&priv->tx.tx_lock); 87 return -ENOBUFS; 88 } 89 __set_bit(slot, priv->tx.tx_slot); 90 spin_unlock_bh(&priv->tx.tx_lock); 91 92 return slot; 93 } 94 95 void ath9k_htc_tx_clear_slot(struct ath9k_htc_priv *priv, int slot) 96 { 97 spin_lock_bh(&priv->tx.tx_lock); 98 __clear_bit(slot, priv->tx.tx_slot); 99 spin_unlock_bh(&priv->tx.tx_lock); 100 } 101 102 static inline enum htc_endpoint_id get_htc_epid(struct ath9k_htc_priv *priv, 103 u16 qnum) 104 { 105 enum htc_endpoint_id epid; 106 107 switch (qnum) { 108 case 0: 109 TX_QSTAT_INC(IEEE80211_AC_VO); 110 epid = priv->data_vo_ep; 111 break; 112 case 1: 113 TX_QSTAT_INC(IEEE80211_AC_VI); 114 epid = priv->data_vi_ep; 115 break; 116 case 2: 117 TX_QSTAT_INC(IEEE80211_AC_BE); 118 epid = priv->data_be_ep; 119 break; 120 case 3: 121 default: 122 TX_QSTAT_INC(IEEE80211_AC_BK); 123 epid = priv->data_bk_ep; 124 break; 125 } 126 127 return epid; 128 } 129 130 static inline struct sk_buff_head* 131 get_htc_epid_queue(struct ath9k_htc_priv *priv, u8 epid) 132 { 133 struct ath_common *common = ath9k_hw_common(priv->ah); 134 struct sk_buff_head *epid_queue = NULL; 135 136 if (epid == priv->mgmt_ep) 137 epid_queue = &priv->tx.mgmt_ep_queue; 138 else if (epid == priv->cab_ep) 139 epid_queue = &priv->tx.cab_ep_queue; 140 else if (epid == priv->data_be_ep) 141 epid_queue = &priv->tx.data_be_queue; 142 else if (epid == priv->data_bk_ep) 143 epid_queue = &priv->tx.data_bk_queue; 144 else if (epid == priv->data_vi_ep) 145 epid_queue = &priv->tx.data_vi_queue; 146 else if (epid == priv->data_vo_ep) 147 epid_queue = &priv->tx.data_vo_queue; 148 else 149 ath_err(common, "Invalid EPID: %d\n", epid); 150 151 return epid_queue; 152 } 153 154 /* 155 * Removes the driver header and returns the TX slot number 156 */ 157 static inline int strip_drv_header(struct ath9k_htc_priv *priv, 158 struct sk_buff *skb) 159 { 160 struct ath_common *common = ath9k_hw_common(priv->ah); 161 struct ath9k_htc_tx_ctl *tx_ctl; 162 int slot; 163 164 tx_ctl = HTC_SKB_CB(skb); 165 166 if (tx_ctl->epid == priv->mgmt_ep) { 167 struct tx_mgmt_hdr *tx_mhdr = 168 (struct tx_mgmt_hdr *)skb->data; 169 slot = tx_mhdr->cookie; 170 skb_pull(skb, sizeof(struct tx_mgmt_hdr)); 171 } else if ((tx_ctl->epid == priv->data_bk_ep) || 172 (tx_ctl->epid == priv->data_be_ep) || 173 (tx_ctl->epid == priv->data_vi_ep) || 174 (tx_ctl->epid == priv->data_vo_ep) || 175 (tx_ctl->epid == priv->cab_ep)) { 176 struct tx_frame_hdr *tx_fhdr = 177 (struct tx_frame_hdr *)skb->data; 178 slot = tx_fhdr->cookie; 179 skb_pull(skb, sizeof(struct tx_frame_hdr)); 180 } else { 181 ath_err(common, "Unsupported EPID: %d\n", tx_ctl->epid); 182 slot = -EINVAL; 183 } 184 185 return slot; 186 } 187 188 int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum, 189 struct ath9k_tx_queue_info *qinfo) 190 { 191 struct ath_hw *ah = priv->ah; 192 int error = 0; 193 struct ath9k_tx_queue_info qi; 194 195 ath9k_hw_get_txq_props(ah, qnum, &qi); 196 197 qi.tqi_aifs = qinfo->tqi_aifs; 198 qi.tqi_cwmin = qinfo->tqi_cwmin / 2; /* XXX */ 199 qi.tqi_cwmax = qinfo->tqi_cwmax; 200 qi.tqi_burstTime = qinfo->tqi_burstTime; 201 qi.tqi_readyTime = qinfo->tqi_readyTime; 202 203 if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { 204 ath_err(ath9k_hw_common(ah), 205 "Unable to update hardware queue %u!\n", qnum); 206 error = -EIO; 207 } else { 208 ath9k_hw_resettxqueue(ah, qnum); 209 } 210 211 return error; 212 } 213 214 static void ath9k_htc_tx_mgmt(struct ath9k_htc_priv *priv, 215 struct ath9k_htc_vif *avp, 216 struct sk_buff *skb, 217 u8 sta_idx, u8 vif_idx, u8 slot) 218 { 219 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); 220 struct ieee80211_mgmt *mgmt; 221 struct ieee80211_hdr *hdr; 222 struct tx_mgmt_hdr mgmt_hdr; 223 struct ath9k_htc_tx_ctl *tx_ctl; 224 u8 *tx_fhdr; 225 226 tx_ctl = HTC_SKB_CB(skb); 227 hdr = (struct ieee80211_hdr *) skb->data; 228 229 memset(tx_ctl, 0, sizeof(*tx_ctl)); 230 memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr)); 231 232 /* 233 * Set the TSF adjust value for probe response 234 * frame also. 235 */ 236 if (avp && unlikely(ieee80211_is_probe_resp(hdr->frame_control))) { 237 mgmt = (struct ieee80211_mgmt *)skb->data; 238 mgmt->u.probe_resp.timestamp = avp->tsfadjust; 239 } 240 241 tx_ctl->type = ATH9K_HTC_MGMT; 242 243 mgmt_hdr.node_idx = sta_idx; 244 mgmt_hdr.vif_idx = vif_idx; 245 mgmt_hdr.tidno = 0; 246 mgmt_hdr.flags = 0; 247 mgmt_hdr.cookie = slot; 248 249 mgmt_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb); 250 if (mgmt_hdr.key_type == ATH9K_KEY_TYPE_CLEAR) 251 mgmt_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID; 252 else 253 mgmt_hdr.keyix = tx_info->control.hw_key->hw_key_idx; 254 255 tx_fhdr = skb_push(skb, sizeof(mgmt_hdr)); 256 memcpy(tx_fhdr, (u8 *) &mgmt_hdr, sizeof(mgmt_hdr)); 257 tx_ctl->epid = priv->mgmt_ep; 258 } 259 260 static void ath9k_htc_tx_data(struct ath9k_htc_priv *priv, 261 struct ieee80211_vif *vif, 262 struct sk_buff *skb, 263 u8 sta_idx, u8 vif_idx, u8 slot, 264 bool is_cab) 265 { 266 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); 267 struct ieee80211_hdr *hdr; 268 struct ath9k_htc_tx_ctl *tx_ctl; 269 struct tx_frame_hdr tx_hdr; 270 u32 flags = 0; 271 u8 *qc, *tx_fhdr; 272 u16 qnum; 273 274 tx_ctl = HTC_SKB_CB(skb); 275 hdr = (struct ieee80211_hdr *) skb->data; 276 277 memset(tx_ctl, 0, sizeof(*tx_ctl)); 278 memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr)); 279 280 tx_hdr.node_idx = sta_idx; 281 tx_hdr.vif_idx = vif_idx; 282 tx_hdr.cookie = slot; 283 284 /* 285 * This is a bit redundant but it helps to get 286 * the per-packet index quickly when draining the 287 * TX queue in the HIF layer. Otherwise we would 288 * have to parse the packet contents ... 289 */ 290 tx_ctl->sta_idx = sta_idx; 291 292 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { 293 tx_ctl->type = ATH9K_HTC_AMPDU; 294 tx_hdr.data_type = ATH9K_HTC_AMPDU; 295 } else { 296 tx_ctl->type = ATH9K_HTC_NORMAL; 297 tx_hdr.data_type = ATH9K_HTC_NORMAL; 298 } 299 300 if (ieee80211_is_data_qos(hdr->frame_control)) { 301 qc = ieee80211_get_qos_ctl(hdr); 302 tx_hdr.tidno = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 303 } 304 305 /* Check for RTS protection */ 306 if (priv->hw->wiphy->rts_threshold != (u32) -1) 307 if (skb->len > priv->hw->wiphy->rts_threshold) 308 flags |= ATH9K_HTC_TX_RTSCTS; 309 310 /* CTS-to-self */ 311 if (!(flags & ATH9K_HTC_TX_RTSCTS) && 312 (vif && vif->bss_conf.use_cts_prot)) 313 flags |= ATH9K_HTC_TX_CTSONLY; 314 315 tx_hdr.flags = cpu_to_be32(flags); 316 tx_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb); 317 if (tx_hdr.key_type == ATH9K_KEY_TYPE_CLEAR) 318 tx_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID; 319 else 320 tx_hdr.keyix = tx_info->control.hw_key->hw_key_idx; 321 322 tx_fhdr = skb_push(skb, sizeof(tx_hdr)); 323 memcpy(tx_fhdr, (u8 *) &tx_hdr, sizeof(tx_hdr)); 324 325 if (is_cab) { 326 CAB_STAT_INC; 327 tx_ctl->epid = priv->cab_ep; 328 return; 329 } 330 331 qnum = skb_get_queue_mapping(skb); 332 tx_ctl->epid = get_htc_epid(priv, qnum); 333 } 334 335 int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, 336 struct ieee80211_sta *sta, 337 struct sk_buff *skb, 338 u8 slot, bool is_cab) 339 { 340 struct ieee80211_hdr *hdr; 341 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); 342 struct ieee80211_vif *vif = tx_info->control.vif; 343 struct ath9k_htc_sta *ista; 344 struct ath9k_htc_vif *avp = NULL; 345 u8 sta_idx, vif_idx; 346 347 hdr = (struct ieee80211_hdr *) skb->data; 348 349 /* 350 * Find out on which interface this packet has to be 351 * sent out. 352 */ 353 if (vif) { 354 avp = (struct ath9k_htc_vif *) vif->drv_priv; 355 vif_idx = avp->index; 356 } else { 357 if (!priv->ah->is_monitoring) { 358 ath_dbg(ath9k_hw_common(priv->ah), XMIT, 359 "VIF is null, but no monitor interface !\n"); 360 return -EINVAL; 361 } 362 363 vif_idx = priv->mon_vif_idx; 364 } 365 366 /* 367 * Find out which station this packet is destined for. 368 */ 369 if (sta) { 370 ista = (struct ath9k_htc_sta *) sta->drv_priv; 371 sta_idx = ista->index; 372 } else { 373 sta_idx = priv->vif_sta_pos[vif_idx]; 374 } 375 376 if (ieee80211_is_data(hdr->frame_control)) 377 ath9k_htc_tx_data(priv, vif, skb, 378 sta_idx, vif_idx, slot, is_cab); 379 else 380 ath9k_htc_tx_mgmt(priv, avp, skb, 381 sta_idx, vif_idx, slot); 382 383 384 return htc_send(priv->htc, skb); 385 } 386 387 static inline bool __ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv, 388 struct ath9k_htc_sta *ista, u8 tid) 389 { 390 bool ret = false; 391 392 spin_lock_bh(&priv->tx.tx_lock); 393 if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP)) 394 ret = true; 395 spin_unlock_bh(&priv->tx.tx_lock); 396 397 return ret; 398 } 399 400 static void ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv, 401 struct ieee80211_vif *vif, 402 struct sk_buff *skb) 403 { 404 struct ieee80211_sta *sta; 405 struct ieee80211_hdr *hdr; 406 __le16 fc; 407 408 hdr = (struct ieee80211_hdr *) skb->data; 409 fc = hdr->frame_control; 410 411 rcu_read_lock(); 412 413 sta = ieee80211_find_sta(vif, hdr->addr1); 414 if (!sta) { 415 rcu_read_unlock(); 416 return; 417 } 418 419 if (sta && conf_is_ht(&priv->hw->conf) && 420 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) { 421 if (ieee80211_is_data_qos(fc)) { 422 u8 *qc, tid; 423 struct ath9k_htc_sta *ista; 424 425 qc = ieee80211_get_qos_ctl(hdr); 426 tid = qc[0] & 0xf; 427 ista = (struct ath9k_htc_sta *)sta->drv_priv; 428 if (__ath9k_htc_check_tx_aggr(priv, ista, tid)) { 429 ieee80211_start_tx_ba_session(sta, tid, 0); 430 spin_lock_bh(&priv->tx.tx_lock); 431 ista->tid_state[tid] = AGGR_PROGRESS; 432 spin_unlock_bh(&priv->tx.tx_lock); 433 } 434 } 435 } 436 437 rcu_read_unlock(); 438 } 439 440 static void ath9k_htc_tx_process(struct ath9k_htc_priv *priv, 441 struct sk_buff *skb, 442 struct __wmi_event_txstatus *txs) 443 { 444 struct ieee80211_vif *vif; 445 struct ath9k_htc_tx_ctl *tx_ctl; 446 struct ieee80211_tx_info *tx_info; 447 struct ieee80211_tx_rate *rate; 448 struct ieee80211_conf *cur_conf = &priv->hw->conf; 449 bool txok; 450 int slot; 451 int hdrlen, padsize; 452 453 slot = strip_drv_header(priv, skb); 454 if (slot < 0) { 455 dev_kfree_skb_any(skb); 456 return; 457 } 458 459 tx_ctl = HTC_SKB_CB(skb); 460 txok = tx_ctl->txok; 461 tx_info = IEEE80211_SKB_CB(skb); 462 vif = tx_info->control.vif; 463 rate = &tx_info->status.rates[0]; 464 465 memset(&tx_info->status, 0, sizeof(tx_info->status)); 466 467 /* 468 * URB submission failed for this frame, it never reached 469 * the target. 470 */ 471 if (!txok || !vif || !txs) 472 goto send_mac80211; 473 474 if (txs->ts_flags & ATH9K_HTC_TXSTAT_ACK) { 475 tx_info->flags |= IEEE80211_TX_STAT_ACK; 476 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) 477 tx_info->flags |= IEEE80211_TX_STAT_AMPDU; 478 } 479 480 if (txs->ts_flags & ATH9K_HTC_TXSTAT_FILT) 481 tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 482 483 if (txs->ts_flags & ATH9K_HTC_TXSTAT_RTC_CTS) 484 rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS; 485 486 rate->count = 1; 487 rate->idx = MS(txs->ts_rate, ATH9K_HTC_TXSTAT_RATE); 488 489 if (txs->ts_flags & ATH9K_HTC_TXSTAT_MCS) { 490 rate->flags |= IEEE80211_TX_RC_MCS; 491 492 if (txs->ts_flags & ATH9K_HTC_TXSTAT_CW40) 493 rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 494 if (txs->ts_flags & ATH9K_HTC_TXSTAT_SGI) 495 rate->flags |= IEEE80211_TX_RC_SHORT_GI; 496 } else { 497 if (cur_conf->chandef.chan->band == NL80211_BAND_5GHZ) 498 rate->idx += 4; /* No CCK rates */ 499 } 500 501 ath9k_htc_check_tx_aggr(priv, vif, skb); 502 503 send_mac80211: 504 spin_lock_bh(&priv->tx.tx_lock); 505 if (WARN_ON(--priv->tx.queued_cnt < 0)) 506 priv->tx.queued_cnt = 0; 507 spin_unlock_bh(&priv->tx.tx_lock); 508 509 ath9k_htc_tx_clear_slot(priv, slot); 510 511 /* Remove padding before handing frame back to mac80211 */ 512 hdrlen = ieee80211_get_hdrlen_from_skb(skb); 513 514 padsize = hdrlen & 3; 515 if (padsize && skb->len > hdrlen + padsize) { 516 memmove(skb->data + padsize, skb->data, hdrlen); 517 skb_pull(skb, padsize); 518 } 519 520 /* Send status to mac80211 */ 521 ieee80211_tx_status(priv->hw, skb); 522 } 523 524 static inline void ath9k_htc_tx_drainq(struct ath9k_htc_priv *priv, 525 struct sk_buff_head *queue) 526 { 527 struct sk_buff *skb; 528 529 while ((skb = skb_dequeue(queue)) != NULL) { 530 ath9k_htc_tx_process(priv, skb, NULL); 531 } 532 } 533 534 void ath9k_htc_tx_drain(struct ath9k_htc_priv *priv) 535 { 536 struct ath9k_htc_tx_event *event, *tmp; 537 538 spin_lock_bh(&priv->tx.tx_lock); 539 priv->tx.flags |= ATH9K_HTC_OP_TX_DRAIN; 540 spin_unlock_bh(&priv->tx.tx_lock); 541 542 /* 543 * Ensure that all pending TX frames are flushed, 544 * and that the TX completion/failed tasklets is killed. 545 */ 546 htc_stop(priv->htc); 547 tasklet_kill(&priv->wmi->wmi_event_tasklet); 548 tasklet_kill(&priv->tx_failed_tasklet); 549 550 ath9k_htc_tx_drainq(priv, &priv->tx.mgmt_ep_queue); 551 ath9k_htc_tx_drainq(priv, &priv->tx.cab_ep_queue); 552 ath9k_htc_tx_drainq(priv, &priv->tx.data_be_queue); 553 ath9k_htc_tx_drainq(priv, &priv->tx.data_bk_queue); 554 ath9k_htc_tx_drainq(priv, &priv->tx.data_vi_queue); 555 ath9k_htc_tx_drainq(priv, &priv->tx.data_vo_queue); 556 ath9k_htc_tx_drainq(priv, &priv->tx.tx_failed); 557 558 /* 559 * The TX cleanup timer has already been killed. 560 */ 561 spin_lock_bh(&priv->wmi->event_lock); 562 list_for_each_entry_safe(event, tmp, &priv->wmi->pending_tx_events, list) { 563 list_del(&event->list); 564 kfree(event); 565 } 566 spin_unlock_bh(&priv->wmi->event_lock); 567 568 spin_lock_bh(&priv->tx.tx_lock); 569 priv->tx.flags &= ~ATH9K_HTC_OP_TX_DRAIN; 570 spin_unlock_bh(&priv->tx.tx_lock); 571 } 572 573 void ath9k_tx_failed_tasklet(unsigned long data) 574 { 575 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data; 576 577 spin_lock_bh(&priv->tx.tx_lock); 578 if (priv->tx.flags & ATH9K_HTC_OP_TX_DRAIN) { 579 spin_unlock_bh(&priv->tx.tx_lock); 580 return; 581 } 582 spin_unlock_bh(&priv->tx.tx_lock); 583 584 ath9k_htc_tx_drainq(priv, &priv->tx.tx_failed); 585 } 586 587 static inline bool check_cookie(struct ath9k_htc_priv *priv, 588 struct sk_buff *skb, 589 u8 cookie, u8 epid) 590 { 591 u8 fcookie = 0; 592 593 if (epid == priv->mgmt_ep) { 594 struct tx_mgmt_hdr *hdr; 595 hdr = (struct tx_mgmt_hdr *) skb->data; 596 fcookie = hdr->cookie; 597 } else if ((epid == priv->data_bk_ep) || 598 (epid == priv->data_be_ep) || 599 (epid == priv->data_vi_ep) || 600 (epid == priv->data_vo_ep) || 601 (epid == priv->cab_ep)) { 602 struct tx_frame_hdr *hdr; 603 hdr = (struct tx_frame_hdr *) skb->data; 604 fcookie = hdr->cookie; 605 } 606 607 if (fcookie == cookie) 608 return true; 609 610 return false; 611 } 612 613 static struct sk_buff* ath9k_htc_tx_get_packet(struct ath9k_htc_priv *priv, 614 struct __wmi_event_txstatus *txs) 615 { 616 struct ath_common *common = ath9k_hw_common(priv->ah); 617 struct sk_buff_head *epid_queue; 618 struct sk_buff *skb, *tmp; 619 unsigned long flags; 620 u8 epid = MS(txs->ts_rate, ATH9K_HTC_TXSTAT_EPID); 621 622 epid_queue = get_htc_epid_queue(priv, epid); 623 if (!epid_queue) 624 return NULL; 625 626 spin_lock_irqsave(&epid_queue->lock, flags); 627 skb_queue_walk_safe(epid_queue, skb, tmp) { 628 if (check_cookie(priv, skb, txs->cookie, epid)) { 629 __skb_unlink(skb, epid_queue); 630 spin_unlock_irqrestore(&epid_queue->lock, flags); 631 return skb; 632 } 633 } 634 spin_unlock_irqrestore(&epid_queue->lock, flags); 635 636 ath_dbg(common, XMIT, "No matching packet for cookie: %d, epid: %d\n", 637 txs->cookie, epid); 638 639 return NULL; 640 } 641 642 void ath9k_htc_txstatus(struct ath9k_htc_priv *priv, void *wmi_event) 643 { 644 struct wmi_event_txstatus *txs = (struct wmi_event_txstatus *)wmi_event; 645 struct __wmi_event_txstatus *__txs; 646 struct sk_buff *skb; 647 struct ath9k_htc_tx_event *tx_pend; 648 int i; 649 650 for (i = 0; i < txs->cnt; i++) { 651 WARN_ON(txs->cnt > HTC_MAX_TX_STATUS); 652 653 __txs = &txs->txstatus[i]; 654 655 skb = ath9k_htc_tx_get_packet(priv, __txs); 656 if (!skb) { 657 /* 658 * Store this event, so that the TX cleanup 659 * routine can check later for the needed packet. 660 */ 661 tx_pend = kzalloc(sizeof(struct ath9k_htc_tx_event), 662 GFP_ATOMIC); 663 if (!tx_pend) 664 continue; 665 666 memcpy(&tx_pend->txs, __txs, 667 sizeof(struct __wmi_event_txstatus)); 668 669 spin_lock(&priv->wmi->event_lock); 670 list_add_tail(&tx_pend->list, 671 &priv->wmi->pending_tx_events); 672 spin_unlock(&priv->wmi->event_lock); 673 674 continue; 675 } 676 677 ath9k_htc_tx_process(priv, skb, __txs); 678 } 679 680 /* Wake TX queues if needed */ 681 ath9k_htc_check_wake_queues(priv); 682 } 683 684 void ath9k_htc_txep(void *drv_priv, struct sk_buff *skb, 685 enum htc_endpoint_id ep_id, bool txok) 686 { 687 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) drv_priv; 688 struct ath9k_htc_tx_ctl *tx_ctl; 689 struct sk_buff_head *epid_queue; 690 691 tx_ctl = HTC_SKB_CB(skb); 692 tx_ctl->txok = txok; 693 tx_ctl->timestamp = jiffies; 694 695 if (!txok) { 696 skb_queue_tail(&priv->tx.tx_failed, skb); 697 tasklet_schedule(&priv->tx_failed_tasklet); 698 return; 699 } 700 701 epid_queue = get_htc_epid_queue(priv, ep_id); 702 if (!epid_queue) { 703 dev_kfree_skb_any(skb); 704 return; 705 } 706 707 skb_queue_tail(epid_queue, skb); 708 } 709 710 static inline bool check_packet(struct ath9k_htc_priv *priv, struct sk_buff *skb) 711 { 712 struct ath_common *common = ath9k_hw_common(priv->ah); 713 struct ath9k_htc_tx_ctl *tx_ctl; 714 715 tx_ctl = HTC_SKB_CB(skb); 716 717 if (time_after(jiffies, 718 tx_ctl->timestamp + 719 msecs_to_jiffies(ATH9K_HTC_TX_TIMEOUT_INTERVAL))) { 720 ath_dbg(common, XMIT, "Dropping a packet due to TX timeout\n"); 721 return true; 722 } 723 724 return false; 725 } 726 727 static void ath9k_htc_tx_cleanup_queue(struct ath9k_htc_priv *priv, 728 struct sk_buff_head *epid_queue) 729 { 730 bool process = false; 731 unsigned long flags; 732 struct sk_buff *skb, *tmp; 733 struct sk_buff_head queue; 734 735 skb_queue_head_init(&queue); 736 737 spin_lock_irqsave(&epid_queue->lock, flags); 738 skb_queue_walk_safe(epid_queue, skb, tmp) { 739 if (check_packet(priv, skb)) { 740 __skb_unlink(skb, epid_queue); 741 __skb_queue_tail(&queue, skb); 742 process = true; 743 } 744 } 745 spin_unlock_irqrestore(&epid_queue->lock, flags); 746 747 if (process) { 748 skb_queue_walk_safe(&queue, skb, tmp) { 749 __skb_unlink(skb, &queue); 750 ath9k_htc_tx_process(priv, skb, NULL); 751 } 752 } 753 } 754 755 void ath9k_htc_tx_cleanup_timer(unsigned long data) 756 { 757 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) data; 758 struct ath_common *common = ath9k_hw_common(priv->ah); 759 struct ath9k_htc_tx_event *event, *tmp; 760 struct sk_buff *skb; 761 762 spin_lock(&priv->wmi->event_lock); 763 list_for_each_entry_safe(event, tmp, &priv->wmi->pending_tx_events, list) { 764 765 skb = ath9k_htc_tx_get_packet(priv, &event->txs); 766 if (skb) { 767 ath_dbg(common, XMIT, 768 "Found packet for cookie: %d, epid: %d\n", 769 event->txs.cookie, 770 MS(event->txs.ts_rate, ATH9K_HTC_TXSTAT_EPID)); 771 772 ath9k_htc_tx_process(priv, skb, &event->txs); 773 list_del(&event->list); 774 kfree(event); 775 continue; 776 } 777 778 if (++event->count >= ATH9K_HTC_TX_TIMEOUT_COUNT) { 779 list_del(&event->list); 780 kfree(event); 781 } 782 } 783 spin_unlock(&priv->wmi->event_lock); 784 785 /* 786 * Check if status-pending packets have to be cleaned up. 787 */ 788 ath9k_htc_tx_cleanup_queue(priv, &priv->tx.mgmt_ep_queue); 789 ath9k_htc_tx_cleanup_queue(priv, &priv->tx.cab_ep_queue); 790 ath9k_htc_tx_cleanup_queue(priv, &priv->tx.data_be_queue); 791 ath9k_htc_tx_cleanup_queue(priv, &priv->tx.data_bk_queue); 792 ath9k_htc_tx_cleanup_queue(priv, &priv->tx.data_vi_queue); 793 ath9k_htc_tx_cleanup_queue(priv, &priv->tx.data_vo_queue); 794 795 /* Wake TX queues if needed */ 796 ath9k_htc_check_wake_queues(priv); 797 798 mod_timer(&priv->tx.cleanup_timer, 799 jiffies + msecs_to_jiffies(ATH9K_HTC_TX_CLEANUP_INTERVAL)); 800 } 801 802 int ath9k_tx_init(struct ath9k_htc_priv *priv) 803 { 804 skb_queue_head_init(&priv->tx.mgmt_ep_queue); 805 skb_queue_head_init(&priv->tx.cab_ep_queue); 806 skb_queue_head_init(&priv->tx.data_be_queue); 807 skb_queue_head_init(&priv->tx.data_bk_queue); 808 skb_queue_head_init(&priv->tx.data_vi_queue); 809 skb_queue_head_init(&priv->tx.data_vo_queue); 810 skb_queue_head_init(&priv->tx.tx_failed); 811 return 0; 812 } 813 814 void ath9k_tx_cleanup(struct ath9k_htc_priv *priv) 815 { 816 817 } 818 819 bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype) 820 { 821 struct ath_hw *ah = priv->ah; 822 struct ath_common *common = ath9k_hw_common(ah); 823 struct ath9k_tx_queue_info qi; 824 int qnum; 825 826 memset(&qi, 0, sizeof(qi)); 827 ATH9K_HTC_INIT_TXQ(subtype); 828 829 qnum = ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_DATA, &qi); 830 if (qnum == -1) 831 return false; 832 833 if (qnum >= ARRAY_SIZE(priv->hwq_map)) { 834 ath_err(common, "qnum %u out of range, max %zu!\n", 835 qnum, ARRAY_SIZE(priv->hwq_map)); 836 ath9k_hw_releasetxqueue(ah, qnum); 837 return false; 838 } 839 840 priv->hwq_map[subtype] = qnum; 841 return true; 842 } 843 844 int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv) 845 { 846 struct ath9k_tx_queue_info qi; 847 848 memset(&qi, 0, sizeof(qi)); 849 ATH9K_HTC_INIT_TXQ(0); 850 851 return ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_CAB, &qi); 852 } 853 854 /******/ 855 /* RX */ 856 /******/ 857 858 /* 859 * Calculate the RX filter to be set in the HW. 860 */ 861 u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv) 862 { 863 #define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR) 864 865 struct ath_hw *ah = priv->ah; 866 u32 rfilt; 867 868 rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE) 869 | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST 870 | ATH9K_RX_FILTER_MCAST; 871 872 if (priv->rxfilter & FIF_PROBE_REQ) 873 rfilt |= ATH9K_RX_FILTER_PROBEREQ; 874 875 if (ah->is_monitoring) 876 rfilt |= ATH9K_RX_FILTER_PROM; 877 878 if (priv->rxfilter & FIF_CONTROL) 879 rfilt |= ATH9K_RX_FILTER_CONTROL; 880 881 if ((ah->opmode == NL80211_IFTYPE_STATION) && 882 (priv->nvifs <= 1) && 883 !(priv->rxfilter & FIF_BCN_PRBRESP_PROMISC)) 884 rfilt |= ATH9K_RX_FILTER_MYBEACON; 885 else 886 rfilt |= ATH9K_RX_FILTER_BEACON; 887 888 if (conf_is_ht(&priv->hw->conf)) { 889 rfilt |= ATH9K_RX_FILTER_COMP_BAR; 890 rfilt |= ATH9K_RX_FILTER_UNCOMP_BA_BAR; 891 } 892 893 if (priv->rxfilter & FIF_PSPOLL) 894 rfilt |= ATH9K_RX_FILTER_PSPOLL; 895 896 if (priv->nvifs > 1 || priv->rxfilter & FIF_OTHER_BSS) 897 rfilt |= ATH9K_RX_FILTER_MCAST_BCAST_ALL; 898 899 return rfilt; 900 901 #undef RX_FILTER_PRESERVE 902 } 903 904 /* 905 * Recv initialization for opmode change. 906 */ 907 static void ath9k_htc_opmode_init(struct ath9k_htc_priv *priv) 908 { 909 struct ath_hw *ah = priv->ah; 910 u32 rfilt, mfilt[2]; 911 912 /* configure rx filter */ 913 rfilt = ath9k_htc_calcrxfilter(priv); 914 ath9k_hw_setrxfilter(ah, rfilt); 915 916 /* calculate and install multicast filter */ 917 mfilt[0] = mfilt[1] = ~0; 918 ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]); 919 } 920 921 void ath9k_host_rx_init(struct ath9k_htc_priv *priv) 922 { 923 struct ath_common *common = ath9k_hw_common(priv->ah); 924 ath9k_hw_rxena(priv->ah); 925 ath9k_htc_opmode_init(priv); 926 ath9k_hw_startpcureceive(priv->ah, test_bit(ATH_OP_SCANNING, &common->op_flags)); 927 } 928 929 static inline void convert_htc_flag(struct ath_rx_status *rx_stats, 930 struct ath_htc_rx_status *rxstatus) 931 { 932 rx_stats->enc_flags = 0; 933 rx_stats->bw = RATE_INFO_BW_20; 934 if (rxstatus->rs_flags & ATH9K_RX_2040) 935 rx_stats->bw = RATE_INFO_BW_40; 936 if (rxstatus->rs_flags & ATH9K_RX_GI) 937 rx_stats->enc_flags |= RX_ENC_FLAG_SHORT_GI; 938 } 939 940 static void rx_status_htc_to_ath(struct ath_rx_status *rx_stats, 941 struct ath_htc_rx_status *rxstatus) 942 { 943 rx_stats->rs_datalen = be16_to_cpu(rxstatus->rs_datalen); 944 rx_stats->rs_status = rxstatus->rs_status; 945 rx_stats->rs_phyerr = rxstatus->rs_phyerr; 946 rx_stats->rs_rssi = rxstatus->rs_rssi; 947 rx_stats->rs_keyix = rxstatus->rs_keyix; 948 rx_stats->rs_rate = rxstatus->rs_rate; 949 rx_stats->rs_antenna = rxstatus->rs_antenna; 950 rx_stats->rs_more = rxstatus->rs_more; 951 952 memcpy(rx_stats->rs_rssi_ctl, rxstatus->rs_rssi_ctl, 953 sizeof(rx_stats->rs_rssi_ctl)); 954 memcpy(rx_stats->rs_rssi_ext, rxstatus->rs_rssi_ext, 955 sizeof(rx_stats->rs_rssi_ext)); 956 957 rx_stats->rs_isaggr = rxstatus->rs_isaggr; 958 rx_stats->rs_moreaggr = rxstatus->rs_moreaggr; 959 rx_stats->rs_num_delims = rxstatus->rs_num_delims; 960 convert_htc_flag(rx_stats, rxstatus); 961 } 962 963 static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv, 964 struct ath9k_htc_rxbuf *rxbuf, 965 struct ieee80211_rx_status *rx_status) 966 967 { 968 struct ieee80211_hdr *hdr; 969 struct ieee80211_hw *hw = priv->hw; 970 struct sk_buff *skb = rxbuf->skb; 971 struct ath_common *common = ath9k_hw_common(priv->ah); 972 struct ath_hw *ah = common->ah; 973 struct ath_htc_rx_status *rxstatus; 974 struct ath_rx_status rx_stats; 975 bool decrypt_error = false; 976 977 if (skb->len < HTC_RX_FRAME_HEADER_SIZE) { 978 ath_err(common, "Corrupted RX frame, dropping (len: %d)\n", 979 skb->len); 980 goto rx_next; 981 } 982 983 rxstatus = (struct ath_htc_rx_status *)skb->data; 984 985 if (be16_to_cpu(rxstatus->rs_datalen) - 986 (skb->len - HTC_RX_FRAME_HEADER_SIZE) != 0) { 987 ath_err(common, 988 "Corrupted RX data len, dropping (dlen: %d, skblen: %d)\n", 989 rxstatus->rs_datalen, skb->len); 990 goto rx_next; 991 } 992 993 /* Get the RX status information */ 994 995 memset(rx_status, 0, sizeof(struct ieee80211_rx_status)); 996 997 /* Copy everything from ath_htc_rx_status (HTC_RX_FRAME_HEADER). 998 * After this, we can drop this part of skb. */ 999 rx_status_htc_to_ath(&rx_stats, rxstatus); 1000 ath9k_htc_err_stat_rx(priv, &rx_stats); 1001 rx_status->mactime = be64_to_cpu(rxstatus->rs_tstamp); 1002 skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE); 1003 1004 /* 1005 * everything but the rate is checked here, the rate check is done 1006 * separately to avoid doing two lookups for a rate for each frame. 1007 */ 1008 hdr = (struct ieee80211_hdr *)skb->data; 1009 1010 /* 1011 * Process PHY errors and return so that the packet 1012 * can be dropped. 1013 */ 1014 if (rx_stats.rs_status & ATH9K_RXERR_PHY) { 1015 /* TODO: Not using DFS processing now. */ 1016 if (ath_cmn_process_fft(&priv->spec_priv, hdr, 1017 &rx_stats, rx_status->mactime)) { 1018 /* TODO: Code to collect spectral scan statistics */ 1019 } 1020 goto rx_next; 1021 } 1022 1023 if (!ath9k_cmn_rx_accept(common, hdr, rx_status, &rx_stats, 1024 &decrypt_error, priv->rxfilter)) 1025 goto rx_next; 1026 1027 ath9k_cmn_rx_skb_postprocess(common, skb, &rx_stats, 1028 rx_status, decrypt_error); 1029 1030 if (ath9k_cmn_process_rate(common, hw, &rx_stats, rx_status)) 1031 goto rx_next; 1032 1033 rx_stats.is_mybeacon = ath_is_mybeacon(common, hdr); 1034 ath9k_cmn_process_rssi(common, hw, &rx_stats, rx_status); 1035 1036 rx_status->band = ah->curchan->chan->band; 1037 rx_status->freq = ah->curchan->chan->center_freq; 1038 rx_status->antenna = rx_stats.rs_antenna; 1039 rx_status->flag |= RX_FLAG_MACTIME_END; 1040 1041 return true; 1042 rx_next: 1043 return false; 1044 } 1045 1046 /* 1047 * FIXME: Handle FLUSH later on. 1048 */ 1049 void ath9k_rx_tasklet(unsigned long data) 1050 { 1051 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data; 1052 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL; 1053 struct ieee80211_rx_status rx_status; 1054 struct sk_buff *skb; 1055 unsigned long flags; 1056 struct ieee80211_hdr *hdr; 1057 1058 do { 1059 spin_lock_irqsave(&priv->rx.rxbuflock, flags); 1060 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) { 1061 if (tmp_buf->in_process) { 1062 rxbuf = tmp_buf; 1063 break; 1064 } 1065 } 1066 1067 if (rxbuf == NULL) { 1068 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags); 1069 break; 1070 } 1071 1072 if (!rxbuf->skb) 1073 goto requeue; 1074 1075 if (!ath9k_rx_prepare(priv, rxbuf, &rx_status)) { 1076 dev_kfree_skb_any(rxbuf->skb); 1077 goto requeue; 1078 } 1079 1080 memcpy(IEEE80211_SKB_RXCB(rxbuf->skb), &rx_status, 1081 sizeof(struct ieee80211_rx_status)); 1082 skb = rxbuf->skb; 1083 hdr = (struct ieee80211_hdr *) skb->data; 1084 1085 if (ieee80211_is_beacon(hdr->frame_control) && priv->ps_enabled) 1086 ieee80211_queue_work(priv->hw, &priv->ps_work); 1087 1088 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags); 1089 1090 ieee80211_rx(priv->hw, skb); 1091 1092 spin_lock_irqsave(&priv->rx.rxbuflock, flags); 1093 requeue: 1094 rxbuf->in_process = false; 1095 rxbuf->skb = NULL; 1096 list_move_tail(&rxbuf->list, &priv->rx.rxbuf); 1097 rxbuf = NULL; 1098 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags); 1099 } while (1); 1100 1101 } 1102 1103 void ath9k_htc_rxep(void *drv_priv, struct sk_buff *skb, 1104 enum htc_endpoint_id ep_id) 1105 { 1106 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)drv_priv; 1107 struct ath_hw *ah = priv->ah; 1108 struct ath_common *common = ath9k_hw_common(ah); 1109 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL; 1110 1111 spin_lock(&priv->rx.rxbuflock); 1112 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) { 1113 if (!tmp_buf->in_process) { 1114 rxbuf = tmp_buf; 1115 break; 1116 } 1117 } 1118 spin_unlock(&priv->rx.rxbuflock); 1119 1120 if (rxbuf == NULL) { 1121 ath_dbg(common, ANY, "No free RX buffer\n"); 1122 goto err; 1123 } 1124 1125 spin_lock(&priv->rx.rxbuflock); 1126 rxbuf->skb = skb; 1127 rxbuf->in_process = true; 1128 spin_unlock(&priv->rx.rxbuflock); 1129 1130 tasklet_schedule(&priv->rx_tasklet); 1131 return; 1132 err: 1133 dev_kfree_skb_any(skb); 1134 } 1135 1136 /* FIXME: Locking for cleanup/init */ 1137 1138 void ath9k_rx_cleanup(struct ath9k_htc_priv *priv) 1139 { 1140 struct ath9k_htc_rxbuf *rxbuf, *tbuf; 1141 1142 list_for_each_entry_safe(rxbuf, tbuf, &priv->rx.rxbuf, list) { 1143 list_del(&rxbuf->list); 1144 if (rxbuf->skb) 1145 dev_kfree_skb_any(rxbuf->skb); 1146 kfree(rxbuf); 1147 } 1148 } 1149 1150 int ath9k_rx_init(struct ath9k_htc_priv *priv) 1151 { 1152 int i = 0; 1153 1154 INIT_LIST_HEAD(&priv->rx.rxbuf); 1155 spin_lock_init(&priv->rx.rxbuflock); 1156 1157 for (i = 0; i < ATH9K_HTC_RXBUF; i++) { 1158 struct ath9k_htc_rxbuf *rxbuf = 1159 kzalloc(sizeof(struct ath9k_htc_rxbuf), GFP_KERNEL); 1160 if (rxbuf == NULL) 1161 goto err; 1162 1163 list_add_tail(&rxbuf->list, &priv->rx.rxbuf); 1164 } 1165 1166 return 0; 1167 1168 err: 1169 ath9k_rx_cleanup(priv); 1170 return -ENOMEM; 1171 } 1172