1/* 2 * Copyright (c) 2010 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#define ATH9K_HTC_INIT_TXQ(subtype) do { \ 24 qi.tqi_subtype = subtype; \ 25 qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; \ 26 qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; \ 27 qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; \ 28 qi.tqi_physCompBuf = 0; \ 29 qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | \ 30 TXQ_FLAG_TXDESCINT_ENABLE; \ 31 } while (0) 32 33int get_hw_qnum(u16 queue, int *hwq_map) 34{ 35 switch (queue) { 36 case 0: 37 return hwq_map[WME_AC_VO]; 38 case 1: 39 return hwq_map[WME_AC_VI]; 40 case 2: 41 return hwq_map[WME_AC_BE]; 42 case 3: 43 return hwq_map[WME_AC_BK]; 44 default: 45 return hwq_map[WME_AC_BE]; 46 } 47} 48 49int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum, 50 struct ath9k_tx_queue_info *qinfo) 51{ 52 struct ath_hw *ah = priv->ah; 53 int error = 0; 54 struct ath9k_tx_queue_info qi; 55 56 ath9k_hw_get_txq_props(ah, qnum, &qi); 57 58 qi.tqi_aifs = qinfo->tqi_aifs; 59 qi.tqi_cwmin = qinfo->tqi_cwmin / 2; 60 qi.tqi_cwmax = qinfo->tqi_cwmax; 61 qi.tqi_burstTime = qinfo->tqi_burstTime; 62 qi.tqi_readyTime = qinfo->tqi_readyTime; 63 64 if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { 65 ath_print(ath9k_hw_common(ah), ATH_DBG_FATAL, 66 "Unable to update hardware queue %u!\n", qnum); 67 error = -EIO; 68 } else { 69 ath9k_hw_resettxqueue(ah, qnum); 70 } 71 72 return error; 73} 74 75int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct sk_buff *skb) 76{ 77 struct ieee80211_hdr *hdr; 78 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); 79 struct ieee80211_sta *sta = tx_info->control.sta; 80 struct ath9k_htc_sta *ista; 81 struct ath9k_htc_tx_ctl tx_ctl; 82 enum htc_endpoint_id epid; 83 u16 qnum; 84 __le16 fc; 85 u8 *tx_fhdr; 86 u8 sta_idx, vif_idx; 87 88 hdr = (struct ieee80211_hdr *) skb->data; 89 fc = hdr->frame_control; 90 91 if (tx_info->control.vif && 92 (struct ath9k_htc_vif *) tx_info->control.vif->drv_priv) 93 vif_idx = ((struct ath9k_htc_vif *) 94 tx_info->control.vif->drv_priv)->index; 95 else 96 vif_idx = priv->nvifs; 97 98 if (sta) { 99 ista = (struct ath9k_htc_sta *) sta->drv_priv; 100 sta_idx = ista->index; 101 } else { 102 sta_idx = 0; 103 } 104 105 memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl)); 106 107 if (ieee80211_is_data(fc)) { 108 struct tx_frame_hdr tx_hdr; 109 u8 *qc; 110 111 memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr)); 112 113 tx_hdr.node_idx = sta_idx; 114 tx_hdr.vif_idx = vif_idx; 115 116 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { 117 tx_ctl.type = ATH9K_HTC_AMPDU; 118 tx_hdr.data_type = ATH9K_HTC_AMPDU; 119 } else { 120 tx_ctl.type = ATH9K_HTC_NORMAL; 121 tx_hdr.data_type = ATH9K_HTC_NORMAL; 122 } 123 124 if (ieee80211_is_data_qos(fc)) { 125 qc = ieee80211_get_qos_ctl(hdr); 126 tx_hdr.tidno = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 127 } 128 129 /* Check for RTS protection */ 130 if (priv->hw->wiphy->rts_threshold != (u32) -1) 131 if (skb->len > priv->hw->wiphy->rts_threshold) 132 tx_hdr.flags |= ATH9K_HTC_TX_RTSCTS; 133 134 /* CTS-to-self */ 135 if (!(tx_hdr.flags & ATH9K_HTC_TX_RTSCTS) && 136 (priv->op_flags & OP_PROTECT_ENABLE)) 137 tx_hdr.flags |= ATH9K_HTC_TX_CTSONLY; 138 139 tx_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb); 140 if (tx_hdr.key_type == ATH9K_KEY_TYPE_CLEAR) 141 tx_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID; 142 else 143 tx_hdr.keyix = tx_info->control.hw_key->hw_key_idx; 144 145 tx_fhdr = skb_push(skb, sizeof(tx_hdr)); 146 memcpy(tx_fhdr, (u8 *) &tx_hdr, sizeof(tx_hdr)); 147 148 qnum = skb_get_queue_mapping(skb); 149 150 switch (qnum) { 151 case 0: 152 TX_QSTAT_INC(WME_AC_VO); 153 epid = priv->data_vo_ep; 154 break; 155 case 1: 156 TX_QSTAT_INC(WME_AC_VI); 157 epid = priv->data_vi_ep; 158 break; 159 case 2: 160 TX_QSTAT_INC(WME_AC_BE); 161 epid = priv->data_be_ep; 162 break; 163 case 3: 164 default: 165 TX_QSTAT_INC(WME_AC_BK); 166 epid = priv->data_bk_ep; 167 break; 168 } 169 } else { 170 struct tx_mgmt_hdr mgmt_hdr; 171 172 memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr)); 173 174 tx_ctl.type = ATH9K_HTC_NORMAL; 175 176 mgmt_hdr.node_idx = sta_idx; 177 mgmt_hdr.vif_idx = vif_idx; 178 mgmt_hdr.tidno = 0; 179 mgmt_hdr.flags = 0; 180 181 mgmt_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb); 182 if (mgmt_hdr.key_type == ATH9K_KEY_TYPE_CLEAR) 183 mgmt_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID; 184 else 185 mgmt_hdr.keyix = tx_info->control.hw_key->hw_key_idx; 186 187 tx_fhdr = skb_push(skb, sizeof(mgmt_hdr)); 188 memcpy(tx_fhdr, (u8 *) &mgmt_hdr, sizeof(mgmt_hdr)); 189 epid = priv->mgmt_ep; 190 } 191 192 return htc_send(priv->htc, skb, epid, &tx_ctl); 193} 194 195static bool ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv, 196 struct ath9k_htc_sta *ista, u8 tid) 197{ 198 bool ret = false; 199 200 spin_lock_bh(&priv->tx_lock); 201 if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP)) 202 ret = true; 203 spin_unlock_bh(&priv->tx_lock); 204 205 return ret; 206} 207 208void ath9k_tx_tasklet(unsigned long data) 209{ 210 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data; 211 struct ieee80211_sta *sta; 212 struct ieee80211_hdr *hdr; 213 struct ieee80211_tx_info *tx_info; 214 struct sk_buff *skb = NULL; 215 __le16 fc; 216 217 while ((skb = skb_dequeue(&priv->tx_queue)) != NULL) { 218 219 hdr = (struct ieee80211_hdr *) skb->data; 220 fc = hdr->frame_control; 221 tx_info = IEEE80211_SKB_CB(skb); 222 223 memset(&tx_info->status, 0, sizeof(tx_info->status)); 224 225 rcu_read_lock(); 226 227 sta = ieee80211_find_sta(priv->vif, hdr->addr1); 228 if (!sta) { 229 rcu_read_unlock(); 230 ieee80211_tx_status(priv->hw, skb); 231 continue; 232 } 233 234 /* Check if we need to start aggregation */ 235 236 if (sta && conf_is_ht(&priv->hw->conf) && 237 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) { 238 if (ieee80211_is_data_qos(fc)) { 239 u8 *qc, tid; 240 struct ath9k_htc_sta *ista; 241 242 qc = ieee80211_get_qos_ctl(hdr); 243 tid = qc[0] & 0xf; 244 ista = (struct ath9k_htc_sta *)sta->drv_priv; 245 246 if (ath9k_htc_check_tx_aggr(priv, ista, tid)) { 247 ieee80211_start_tx_ba_session(sta, tid); 248 spin_lock_bh(&priv->tx_lock); 249 ista->tid_state[tid] = AGGR_PROGRESS; 250 spin_unlock_bh(&priv->tx_lock); 251 } 252 } 253 } 254 255 rcu_read_unlock(); 256 257 /* Send status to mac80211 */ 258 ieee80211_tx_status(priv->hw, skb); 259 } 260 261 /* Wake TX queues if needed */ 262 spin_lock_bh(&priv->tx_lock); 263 if (priv->tx_queues_stop) { 264 priv->tx_queues_stop = false; 265 spin_unlock_bh(&priv->tx_lock); 266 ath_print(ath9k_hw_common(priv->ah), ATH_DBG_XMIT, 267 "Waking up TX queues\n"); 268 ieee80211_wake_queues(priv->hw); 269 return; 270 } 271 spin_unlock_bh(&priv->tx_lock); 272} 273 274void ath9k_htc_txep(void *drv_priv, struct sk_buff *skb, 275 enum htc_endpoint_id ep_id, bool txok) 276{ 277 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) drv_priv; 278 struct ath_common *common = ath9k_hw_common(priv->ah); 279 struct ieee80211_tx_info *tx_info; 280 281 if (!skb) 282 return; 283 284 if (ep_id == priv->mgmt_ep) { 285 skb_pull(skb, sizeof(struct tx_mgmt_hdr)); 286 } else if ((ep_id == priv->data_bk_ep) || 287 (ep_id == priv->data_be_ep) || 288 (ep_id == priv->data_vi_ep) || 289 (ep_id == priv->data_vo_ep)) { 290 skb_pull(skb, sizeof(struct tx_frame_hdr)); 291 } else { 292 ath_print(common, ATH_DBG_FATAL, 293 "Unsupported TX EPID: %d\n", ep_id); 294 dev_kfree_skb_any(skb); 295 return; 296 } 297 298 tx_info = IEEE80211_SKB_CB(skb); 299 300 if (txok) 301 tx_info->flags |= IEEE80211_TX_STAT_ACK; 302 303 skb_queue_tail(&priv->tx_queue, skb); 304 tasklet_schedule(&priv->tx_tasklet); 305} 306 307int ath9k_tx_init(struct ath9k_htc_priv *priv) 308{ 309 skb_queue_head_init(&priv->tx_queue); 310 return 0; 311} 312 313void ath9k_tx_cleanup(struct ath9k_htc_priv *priv) 314{ 315 316} 317 318bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype) 319{ 320 struct ath_hw *ah = priv->ah; 321 struct ath_common *common = ath9k_hw_common(ah); 322 struct ath9k_tx_queue_info qi; 323 int qnum; 324 325 memset(&qi, 0, sizeof(qi)); 326 ATH9K_HTC_INIT_TXQ(subtype); 327 328 qnum = ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_DATA, &qi); 329 if (qnum == -1) 330 return false; 331 332 if (qnum >= ARRAY_SIZE(priv->hwq_map)) { 333 ath_print(common, ATH_DBG_FATAL, 334 "qnum %u out of range, max %u!\n", 335 qnum, (unsigned int)ARRAY_SIZE(priv->hwq_map)); 336 ath9k_hw_releasetxqueue(ah, qnum); 337 return false; 338 } 339 340 priv->hwq_map[subtype] = qnum; 341 return true; 342} 343 344int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv) 345{ 346 struct ath9k_tx_queue_info qi; 347 348 memset(&qi, 0, sizeof(qi)); 349 ATH9K_HTC_INIT_TXQ(0); 350 351 return ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_CAB, &qi); 352} 353 354/******/ 355/* RX */ 356/******/ 357 358/* 359 * Calculate the RX filter to be set in the HW. 360 */ 361u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv) 362{ 363#define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR) 364 365 struct ath_hw *ah = priv->ah; 366 u32 rfilt; 367 368 rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE) 369 | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST 370 | ATH9K_RX_FILTER_MCAST; 371 372 /* If not a STA, enable processing of Probe Requests */ 373 if (ah->opmode != NL80211_IFTYPE_STATION) 374 rfilt |= ATH9K_RX_FILTER_PROBEREQ; 375 376 /* 377 * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station 378 * mode interface or when in monitor mode. AP mode does not need this 379 * since it receives all in-BSS frames anyway. 380 */ 381 if (((ah->opmode != NL80211_IFTYPE_AP) && 382 (priv->rxfilter & FIF_PROMISC_IN_BSS)) || 383 (ah->opmode == NL80211_IFTYPE_MONITOR)) 384 rfilt |= ATH9K_RX_FILTER_PROM; 385 386 if (priv->rxfilter & FIF_CONTROL) 387 rfilt |= ATH9K_RX_FILTER_CONTROL; 388 389 if ((ah->opmode == NL80211_IFTYPE_STATION) && 390 !(priv->rxfilter & FIF_BCN_PRBRESP_PROMISC)) 391 rfilt |= ATH9K_RX_FILTER_MYBEACON; 392 else 393 rfilt |= ATH9K_RX_FILTER_BEACON; 394 395 if (conf_is_ht(&priv->hw->conf)) 396 rfilt |= ATH9K_RX_FILTER_COMP_BAR; 397 398 return rfilt; 399 400#undef RX_FILTER_PRESERVE 401} 402 403/* 404 * Recv initialization for opmode change. 405 */ 406static void ath9k_htc_opmode_init(struct ath9k_htc_priv *priv) 407{ 408 struct ath_hw *ah = priv->ah; 409 struct ath_common *common = ath9k_hw_common(ah); 410 411 u32 rfilt, mfilt[2]; 412 413 /* configure rx filter */ 414 rfilt = ath9k_htc_calcrxfilter(priv); 415 ath9k_hw_setrxfilter(ah, rfilt); 416 417 /* configure bssid mask */ 418 if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) 419 ath_hw_setbssidmask(common); 420 421 /* configure operational mode */ 422 ath9k_hw_setopmode(ah); 423 424 /* calculate and install multicast filter */ 425 mfilt[0] = mfilt[1] = ~0; 426 ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]); 427} 428 429void ath9k_host_rx_init(struct ath9k_htc_priv *priv) 430{ 431 ath9k_hw_rxena(priv->ah); 432 ath9k_htc_opmode_init(priv); 433 ath9k_hw_startpcureceive(priv->ah, (priv->op_flags & OP_SCANNING)); 434 priv->rx.last_rssi = ATH_RSSI_DUMMY_MARKER; 435} 436 437static void ath9k_process_rate(struct ieee80211_hw *hw, 438 struct ieee80211_rx_status *rxs, 439 u8 rx_rate, u8 rs_flags) 440{ 441 struct ieee80211_supported_band *sband; 442 enum ieee80211_band band; 443 unsigned int i = 0; 444 445 if (rx_rate & 0x80) { 446 /* HT rate */ 447 rxs->flag |= RX_FLAG_HT; 448 if (rs_flags & ATH9K_RX_2040) 449 rxs->flag |= RX_FLAG_40MHZ; 450 if (rs_flags & ATH9K_RX_GI) 451 rxs->flag |= RX_FLAG_SHORT_GI; 452 rxs->rate_idx = rx_rate & 0x7f; 453 return; 454 } 455 456 band = hw->conf.channel->band; 457 sband = hw->wiphy->bands[band]; 458 459 for (i = 0; i < sband->n_bitrates; i++) { 460 if (sband->bitrates[i].hw_value == rx_rate) { 461 rxs->rate_idx = i; 462 return; 463 } 464 if (sband->bitrates[i].hw_value_short == rx_rate) { 465 rxs->rate_idx = i; 466 rxs->flag |= RX_FLAG_SHORTPRE; 467 return; 468 } 469 } 470 471} 472 473static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv, 474 struct ath9k_htc_rxbuf *rxbuf, 475 struct ieee80211_rx_status *rx_status) 476 477{ 478 struct ieee80211_hdr *hdr; 479 struct ieee80211_hw *hw = priv->hw; 480 struct sk_buff *skb = rxbuf->skb; 481 struct ath_common *common = ath9k_hw_common(priv->ah); 482 struct ath_htc_rx_status *rxstatus; 483 int hdrlen, padpos, padsize; 484 int last_rssi = ATH_RSSI_DUMMY_MARKER; 485 __le16 fc; 486 487 if (skb->len <= HTC_RX_FRAME_HEADER_SIZE) { 488 ath_print(common, ATH_DBG_FATAL, 489 "Corrupted RX frame, dropping\n"); 490 goto rx_next; 491 } 492 493 rxstatus = (struct ath_htc_rx_status *)skb->data; 494 495 if (be16_to_cpu(rxstatus->rs_datalen) - 496 (skb->len - HTC_RX_FRAME_HEADER_SIZE) != 0) { 497 ath_print(common, ATH_DBG_FATAL, 498 "Corrupted RX data len, dropping " 499 "(dlen: %d, skblen: %d)\n", 500 rxstatus->rs_datalen, skb->len); 501 goto rx_next; 502 } 503 504 /* Get the RX status information */ 505 memcpy(&rxbuf->rxstatus, rxstatus, HTC_RX_FRAME_HEADER_SIZE); 506 skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE); 507 508 hdr = (struct ieee80211_hdr *)skb->data; 509 fc = hdr->frame_control; 510 hdrlen = ieee80211_get_hdrlen_from_skb(skb); 511 512 padpos = ath9k_cmn_padpos(fc); 513 514 padsize = padpos & 3; 515 if (padsize && skb->len >= padpos+padsize+FCS_LEN) { 516 memmove(skb->data + padsize, skb->data, padpos); 517 skb_pull(skb, padsize); 518 } 519 520 memset(rx_status, 0, sizeof(struct ieee80211_rx_status)); 521 522 if (rxbuf->rxstatus.rs_status != 0) { 523 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_CRC) 524 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 525 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_PHY) 526 goto rx_next; 527 528 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT) { 529 } else if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_MIC) { 530 if (ieee80211_is_ctl(fc)) 531 /* 532 * Sometimes, we get invalid 533 * MIC failures on valid control frames. 534 * Remove these mic errors. 535 */ 536 rxbuf->rxstatus.rs_status &= ~ATH9K_RXERR_MIC; 537 else 538 rx_status->flag |= RX_FLAG_MMIC_ERROR; 539 } 540 541 /* 542 * Reject error frames with the exception of 543 * decryption and MIC failures. For monitor mode, 544 * we also ignore the CRC error. 545 */ 546 if (priv->ah->opmode == NL80211_IFTYPE_MONITOR) { 547 if (rxbuf->rxstatus.rs_status & 548 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC | 549 ATH9K_RXERR_CRC)) 550 goto rx_next; 551 } else { 552 if (rxbuf->rxstatus.rs_status & 553 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) { 554 goto rx_next; 555 } 556 } 557 } 558 559 if (!(rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT)) { 560 u8 keyix; 561 keyix = rxbuf->rxstatus.rs_keyix; 562 if (keyix != ATH9K_RXKEYIX_INVALID) { 563 rx_status->flag |= RX_FLAG_DECRYPTED; 564 } else if (ieee80211_has_protected(fc) && 565 skb->len >= hdrlen + 4) { 566 keyix = skb->data[hdrlen + 3] >> 6; 567 if (test_bit(keyix, common->keymap)) 568 rx_status->flag |= RX_FLAG_DECRYPTED; 569 } 570 } 571 572 ath9k_process_rate(hw, rx_status, rxbuf->rxstatus.rs_rate, 573 rxbuf->rxstatus.rs_flags); 574 575 if (priv->op_flags & OP_ASSOCIATED) { 576 if (rxbuf->rxstatus.rs_rssi != ATH9K_RSSI_BAD && 577 !rxbuf->rxstatus.rs_moreaggr) 578 ATH_RSSI_LPF(priv->rx.last_rssi, 579 rxbuf->rxstatus.rs_rssi); 580 581 last_rssi = priv->rx.last_rssi; 582 583 if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER)) 584 rxbuf->rxstatus.rs_rssi = ATH_EP_RND(last_rssi, 585 ATH_RSSI_EP_MULTIPLIER); 586 587 if (rxbuf->rxstatus.rs_rssi < 0) 588 rxbuf->rxstatus.rs_rssi = 0; 589 590 if (ieee80211_is_beacon(fc)) 591 priv->ah->stats.avgbrssi = rxbuf->rxstatus.rs_rssi; 592 } 593 594 rx_status->mactime = be64_to_cpu(rxbuf->rxstatus.rs_tstamp); 595 rx_status->band = hw->conf.channel->band; 596 rx_status->freq = hw->conf.channel->center_freq; 597 rx_status->signal = rxbuf->rxstatus.rs_rssi + ATH_DEFAULT_NOISE_FLOOR; 598 rx_status->antenna = rxbuf->rxstatus.rs_antenna; 599 rx_status->flag |= RX_FLAG_TSFT; 600 601 return true; 602 603rx_next: 604 return false; 605} 606 607void ath9k_rx_tasklet(unsigned long data) 608{ 609 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data; 610 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL; 611 struct ieee80211_rx_status rx_status; 612 struct sk_buff *skb; 613 unsigned long flags; 614 struct ieee80211_hdr *hdr; 615 616 do { 617 spin_lock_irqsave(&priv->rx.rxbuflock, flags); 618 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) { 619 if (tmp_buf->in_process) { 620 rxbuf = tmp_buf; 621 break; 622 } 623 } 624 625 if (rxbuf == NULL) { 626 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags); 627 break; 628 } 629 630 if (!rxbuf->skb) 631 goto requeue; 632 633 if (!ath9k_rx_prepare(priv, rxbuf, &rx_status)) { 634 dev_kfree_skb_any(rxbuf->skb); 635 goto requeue; 636 } 637 638 memcpy(IEEE80211_SKB_RXCB(rxbuf->skb), &rx_status, 639 sizeof(struct ieee80211_rx_status)); 640 skb = rxbuf->skb; 641 hdr = (struct ieee80211_hdr *) skb->data; 642 643 if (ieee80211_is_beacon(hdr->frame_control) && priv->ps_enabled) 644 ieee80211_queue_work(priv->hw, &priv->ps_work); 645 646 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags); 647 648 ieee80211_rx(priv->hw, skb); 649 650 spin_lock_irqsave(&priv->rx.rxbuflock, flags); 651requeue: 652 rxbuf->in_process = false; 653 rxbuf->skb = NULL; 654 list_move_tail(&rxbuf->list, &priv->rx.rxbuf); 655 rxbuf = NULL; 656 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags); 657 } while (1); 658 659} 660 661void ath9k_htc_rxep(void *drv_priv, struct sk_buff *skb, 662 enum htc_endpoint_id ep_id) 663{ 664 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)drv_priv; 665 struct ath_hw *ah = priv->ah; 666 struct ath_common *common = ath9k_hw_common(ah); 667 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL; 668 669 spin_lock(&priv->rx.rxbuflock); 670 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) { 671 if (!tmp_buf->in_process) { 672 rxbuf = tmp_buf; 673 break; 674 } 675 } 676 spin_unlock(&priv->rx.rxbuflock); 677 678 if (rxbuf == NULL) { 679 ath_print(common, ATH_DBG_ANY, 680 "No free RX buffer\n"); 681 goto err; 682 } 683 684 spin_lock(&priv->rx.rxbuflock); 685 rxbuf->skb = skb; 686 rxbuf->in_process = true; 687 spin_unlock(&priv->rx.rxbuflock); 688 689 tasklet_schedule(&priv->rx_tasklet); 690 return; 691err: 692 dev_kfree_skb_any(skb); 693} 694 695 696void ath9k_rx_cleanup(struct ath9k_htc_priv *priv) 697{ 698 struct ath9k_htc_rxbuf *rxbuf, *tbuf; 699 700 list_for_each_entry_safe(rxbuf, tbuf, &priv->rx.rxbuf, list) { 701 list_del(&rxbuf->list); 702 if (rxbuf->skb) 703 dev_kfree_skb_any(rxbuf->skb); 704 kfree(rxbuf); 705 } 706} 707 708int ath9k_rx_init(struct ath9k_htc_priv *priv) 709{ 710 struct ath_hw *ah = priv->ah; 711 struct ath_common *common = ath9k_hw_common(ah); 712 struct ath9k_htc_rxbuf *rxbuf; 713 int i = 0; 714 715 INIT_LIST_HEAD(&priv->rx.rxbuf); 716 spin_lock_init(&priv->rx.rxbuflock); 717 718 for (i = 0; i < ATH9K_HTC_RXBUF; i++) { 719 rxbuf = kzalloc(sizeof(struct ath9k_htc_rxbuf), GFP_KERNEL); 720 if (rxbuf == NULL) { 721 ath_print(common, ATH_DBG_FATAL, 722 "Unable to allocate RX buffers\n"); 723 goto err; 724 } 725 list_add_tail(&rxbuf->list, &priv->rx.rxbuf); 726 } 727 728 return 0; 729 730err: 731 ath9k_rx_cleanup(priv); 732 return -ENOMEM; 733} 734