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 static const int subtype_txq_to_hwq[] = { 24 [WME_AC_BE] = ATH_TXQ_AC_BE, 25 [WME_AC_BK] = ATH_TXQ_AC_BK, 26 [WME_AC_VI] = ATH_TXQ_AC_VI, 27 [WME_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[WME_AC_VO]; 45 case 1: 46 return hwq_map[WME_AC_VI]; 47 case 2: 48 return hwq_map[WME_AC_BE]; 49 case 3: 50 return hwq_map[WME_AC_BK]; 51 default: 52 return hwq_map[WME_AC_BE]; 53 } 54 } 55 56 int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum, 57 struct ath9k_tx_queue_info *qinfo) 58 { 59 struct ath_hw *ah = priv->ah; 60 int error = 0; 61 struct ath9k_tx_queue_info qi; 62 63 ath9k_hw_get_txq_props(ah, qnum, &qi); 64 65 qi.tqi_aifs = qinfo->tqi_aifs; 66 qi.tqi_cwmin = qinfo->tqi_cwmin / 2; /* XXX */ 67 qi.tqi_cwmax = qinfo->tqi_cwmax; 68 qi.tqi_burstTime = qinfo->tqi_burstTime; 69 qi.tqi_readyTime = qinfo->tqi_readyTime; 70 71 if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { 72 ath_err(ath9k_hw_common(ah), 73 "Unable to update hardware queue %u!\n", qnum); 74 error = -EIO; 75 } else { 76 ath9k_hw_resettxqueue(ah, qnum); 77 } 78 79 return error; 80 } 81 82 int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct sk_buff *skb) 83 { 84 struct ieee80211_hdr *hdr; 85 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); 86 struct ieee80211_sta *sta = tx_info->control.sta; 87 struct ath9k_htc_sta *ista; 88 struct ath9k_htc_tx_ctl tx_ctl; 89 enum htc_endpoint_id epid; 90 u16 qnum; 91 __le16 fc; 92 u8 *tx_fhdr; 93 u8 sta_idx, vif_idx; 94 95 hdr = (struct ieee80211_hdr *) skb->data; 96 fc = hdr->frame_control; 97 98 if (tx_info->control.vif && 99 (struct ath9k_htc_vif *) tx_info->control.vif->drv_priv) 100 vif_idx = ((struct ath9k_htc_vif *) 101 tx_info->control.vif->drv_priv)->index; 102 else 103 vif_idx = priv->nvifs; 104 105 if (sta) { 106 ista = (struct ath9k_htc_sta *) sta->drv_priv; 107 sta_idx = ista->index; 108 } else { 109 sta_idx = 0; 110 } 111 112 memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl)); 113 114 if (ieee80211_is_data(fc)) { 115 struct tx_frame_hdr tx_hdr; 116 u32 flags = 0; 117 u8 *qc; 118 119 memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr)); 120 121 tx_hdr.node_idx = sta_idx; 122 tx_hdr.vif_idx = vif_idx; 123 124 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { 125 tx_ctl.type = ATH9K_HTC_AMPDU; 126 tx_hdr.data_type = ATH9K_HTC_AMPDU; 127 } else { 128 tx_ctl.type = ATH9K_HTC_NORMAL; 129 tx_hdr.data_type = ATH9K_HTC_NORMAL; 130 } 131 132 if (ieee80211_is_data_qos(fc)) { 133 qc = ieee80211_get_qos_ctl(hdr); 134 tx_hdr.tidno = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 135 } 136 137 /* Check for RTS protection */ 138 if (priv->hw->wiphy->rts_threshold != (u32) -1) 139 if (skb->len > priv->hw->wiphy->rts_threshold) 140 flags |= ATH9K_HTC_TX_RTSCTS; 141 142 /* CTS-to-self */ 143 if (!(flags & ATH9K_HTC_TX_RTSCTS) && 144 (priv->op_flags & OP_PROTECT_ENABLE)) 145 flags |= ATH9K_HTC_TX_CTSONLY; 146 147 tx_hdr.flags = cpu_to_be32(flags); 148 tx_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb); 149 if (tx_hdr.key_type == ATH9K_KEY_TYPE_CLEAR) 150 tx_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID; 151 else 152 tx_hdr.keyix = tx_info->control.hw_key->hw_key_idx; 153 154 tx_fhdr = skb_push(skb, sizeof(tx_hdr)); 155 memcpy(tx_fhdr, (u8 *) &tx_hdr, sizeof(tx_hdr)); 156 157 qnum = skb_get_queue_mapping(skb); 158 159 switch (qnum) { 160 case 0: 161 TX_QSTAT_INC(WME_AC_VO); 162 epid = priv->data_vo_ep; 163 break; 164 case 1: 165 TX_QSTAT_INC(WME_AC_VI); 166 epid = priv->data_vi_ep; 167 break; 168 case 2: 169 TX_QSTAT_INC(WME_AC_BE); 170 epid = priv->data_be_ep; 171 break; 172 case 3: 173 default: 174 TX_QSTAT_INC(WME_AC_BK); 175 epid = priv->data_bk_ep; 176 break; 177 } 178 } else { 179 struct tx_mgmt_hdr mgmt_hdr; 180 181 memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr)); 182 183 tx_ctl.type = ATH9K_HTC_NORMAL; 184 185 mgmt_hdr.node_idx = sta_idx; 186 mgmt_hdr.vif_idx = vif_idx; 187 mgmt_hdr.tidno = 0; 188 mgmt_hdr.flags = 0; 189 190 mgmt_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb); 191 if (mgmt_hdr.key_type == ATH9K_KEY_TYPE_CLEAR) 192 mgmt_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID; 193 else 194 mgmt_hdr.keyix = tx_info->control.hw_key->hw_key_idx; 195 196 tx_fhdr = skb_push(skb, sizeof(mgmt_hdr)); 197 memcpy(tx_fhdr, (u8 *) &mgmt_hdr, sizeof(mgmt_hdr)); 198 epid = priv->mgmt_ep; 199 } 200 201 return htc_send(priv->htc, skb, epid, &tx_ctl); 202 } 203 204 static bool ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv, 205 struct ath9k_htc_sta *ista, u8 tid) 206 { 207 bool ret = false; 208 209 spin_lock_bh(&priv->tx_lock); 210 if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP)) 211 ret = true; 212 spin_unlock_bh(&priv->tx_lock); 213 214 return ret; 215 } 216 217 void ath9k_tx_tasklet(unsigned long data) 218 { 219 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data; 220 struct ieee80211_sta *sta; 221 struct ieee80211_hdr *hdr; 222 struct ieee80211_tx_info *tx_info; 223 struct sk_buff *skb = NULL; 224 __le16 fc; 225 226 while ((skb = skb_dequeue(&priv->tx_queue)) != NULL) { 227 228 hdr = (struct ieee80211_hdr *) skb->data; 229 fc = hdr->frame_control; 230 tx_info = IEEE80211_SKB_CB(skb); 231 232 memset(&tx_info->status, 0, sizeof(tx_info->status)); 233 234 rcu_read_lock(); 235 236 sta = ieee80211_find_sta(priv->vif, hdr->addr1); 237 if (!sta) { 238 rcu_read_unlock(); 239 ieee80211_tx_status(priv->hw, skb); 240 continue; 241 } 242 243 /* Check if we need to start aggregation */ 244 245 if (sta && conf_is_ht(&priv->hw->conf) && 246 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) { 247 if (ieee80211_is_data_qos(fc)) { 248 u8 *qc, tid; 249 struct ath9k_htc_sta *ista; 250 251 qc = ieee80211_get_qos_ctl(hdr); 252 tid = qc[0] & 0xf; 253 ista = (struct ath9k_htc_sta *)sta->drv_priv; 254 255 if (ath9k_htc_check_tx_aggr(priv, ista, tid)) { 256 ieee80211_start_tx_ba_session(sta, tid, 0); 257 spin_lock_bh(&priv->tx_lock); 258 ista->tid_state[tid] = AGGR_PROGRESS; 259 spin_unlock_bh(&priv->tx_lock); 260 } 261 } 262 } 263 264 rcu_read_unlock(); 265 266 /* Send status to mac80211 */ 267 ieee80211_tx_status(priv->hw, skb); 268 } 269 270 /* Wake TX queues if needed */ 271 spin_lock_bh(&priv->tx_lock); 272 if (priv->tx_queues_stop) { 273 priv->tx_queues_stop = false; 274 spin_unlock_bh(&priv->tx_lock); 275 ath_dbg(ath9k_hw_common(priv->ah), ATH_DBG_XMIT, 276 "Waking up TX queues\n"); 277 ieee80211_wake_queues(priv->hw); 278 return; 279 } 280 spin_unlock_bh(&priv->tx_lock); 281 } 282 283 void ath9k_htc_txep(void *drv_priv, struct sk_buff *skb, 284 enum htc_endpoint_id ep_id, bool txok) 285 { 286 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) drv_priv; 287 struct ath_common *common = ath9k_hw_common(priv->ah); 288 struct ieee80211_tx_info *tx_info; 289 290 if (!skb) 291 return; 292 293 if (ep_id == priv->mgmt_ep) { 294 skb_pull(skb, sizeof(struct tx_mgmt_hdr)); 295 } else if ((ep_id == priv->data_bk_ep) || 296 (ep_id == priv->data_be_ep) || 297 (ep_id == priv->data_vi_ep) || 298 (ep_id == priv->data_vo_ep)) { 299 skb_pull(skb, sizeof(struct tx_frame_hdr)); 300 } else { 301 ath_err(common, "Unsupported TX EPID: %d\n", ep_id); 302 dev_kfree_skb_any(skb); 303 return; 304 } 305 306 tx_info = IEEE80211_SKB_CB(skb); 307 308 if (txok) 309 tx_info->flags |= IEEE80211_TX_STAT_ACK; 310 311 skb_queue_tail(&priv->tx_queue, skb); 312 tasklet_schedule(&priv->tx_tasklet); 313 } 314 315 int ath9k_tx_init(struct ath9k_htc_priv *priv) 316 { 317 skb_queue_head_init(&priv->tx_queue); 318 return 0; 319 } 320 321 void ath9k_tx_cleanup(struct ath9k_htc_priv *priv) 322 { 323 324 } 325 326 bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype) 327 { 328 struct ath_hw *ah = priv->ah; 329 struct ath_common *common = ath9k_hw_common(ah); 330 struct ath9k_tx_queue_info qi; 331 int qnum; 332 333 memset(&qi, 0, sizeof(qi)); 334 ATH9K_HTC_INIT_TXQ(subtype); 335 336 qnum = ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_DATA, &qi); 337 if (qnum == -1) 338 return false; 339 340 if (qnum >= ARRAY_SIZE(priv->hwq_map)) { 341 ath_err(common, "qnum %u out of range, max %zu!\n", 342 qnum, ARRAY_SIZE(priv->hwq_map)); 343 ath9k_hw_releasetxqueue(ah, qnum); 344 return false; 345 } 346 347 priv->hwq_map[subtype] = qnum; 348 return true; 349 } 350 351 int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv) 352 { 353 struct ath9k_tx_queue_info qi; 354 355 memset(&qi, 0, sizeof(qi)); 356 ATH9K_HTC_INIT_TXQ(0); 357 358 return ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_CAB, &qi); 359 } 360 361 /******/ 362 /* RX */ 363 /******/ 364 365 /* 366 * Calculate the RX filter to be set in the HW. 367 */ 368 u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv) 369 { 370 #define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR) 371 372 struct ath_hw *ah = priv->ah; 373 u32 rfilt; 374 375 rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE) 376 | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST 377 | ATH9K_RX_FILTER_MCAST; 378 379 if (priv->rxfilter & FIF_PROBE_REQ) 380 rfilt |= ATH9K_RX_FILTER_PROBEREQ; 381 382 /* 383 * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station 384 * mode interface or when in monitor mode. AP mode does not need this 385 * since it receives all in-BSS frames anyway. 386 */ 387 if (((ah->opmode != NL80211_IFTYPE_AP) && 388 (priv->rxfilter & FIF_PROMISC_IN_BSS)) || 389 (ah->opmode == NL80211_IFTYPE_MONITOR)) 390 rfilt |= ATH9K_RX_FILTER_PROM; 391 392 if (priv->rxfilter & FIF_CONTROL) 393 rfilt |= ATH9K_RX_FILTER_CONTROL; 394 395 if ((ah->opmode == NL80211_IFTYPE_STATION) && 396 !(priv->rxfilter & FIF_BCN_PRBRESP_PROMISC)) 397 rfilt |= ATH9K_RX_FILTER_MYBEACON; 398 else 399 rfilt |= ATH9K_RX_FILTER_BEACON; 400 401 if (conf_is_ht(&priv->hw->conf)) 402 rfilt |= ATH9K_RX_FILTER_COMP_BAR; 403 404 return rfilt; 405 406 #undef RX_FILTER_PRESERVE 407 } 408 409 /* 410 * Recv initialization for opmode change. 411 */ 412 static void ath9k_htc_opmode_init(struct ath9k_htc_priv *priv) 413 { 414 struct ath_hw *ah = priv->ah; 415 struct ath_common *common = ath9k_hw_common(ah); 416 417 u32 rfilt, mfilt[2]; 418 419 /* configure rx filter */ 420 rfilt = ath9k_htc_calcrxfilter(priv); 421 ath9k_hw_setrxfilter(ah, rfilt); 422 423 /* configure bssid mask */ 424 ath_hw_setbssidmask(common); 425 426 /* configure operational mode */ 427 ath9k_hw_setopmode(ah); 428 429 /* calculate and install multicast filter */ 430 mfilt[0] = mfilt[1] = ~0; 431 ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]); 432 } 433 434 void ath9k_host_rx_init(struct ath9k_htc_priv *priv) 435 { 436 ath9k_hw_rxena(priv->ah); 437 ath9k_htc_opmode_init(priv); 438 ath9k_hw_startpcureceive(priv->ah, (priv->op_flags & OP_SCANNING)); 439 priv->rx.last_rssi = ATH_RSSI_DUMMY_MARKER; 440 } 441 442 static void ath9k_process_rate(struct ieee80211_hw *hw, 443 struct ieee80211_rx_status *rxs, 444 u8 rx_rate, u8 rs_flags) 445 { 446 struct ieee80211_supported_band *sband; 447 enum ieee80211_band band; 448 unsigned int i = 0; 449 450 if (rx_rate & 0x80) { 451 /* HT rate */ 452 rxs->flag |= RX_FLAG_HT; 453 if (rs_flags & ATH9K_RX_2040) 454 rxs->flag |= RX_FLAG_40MHZ; 455 if (rs_flags & ATH9K_RX_GI) 456 rxs->flag |= RX_FLAG_SHORT_GI; 457 rxs->rate_idx = rx_rate & 0x7f; 458 return; 459 } 460 461 band = hw->conf.channel->band; 462 sband = hw->wiphy->bands[band]; 463 464 for (i = 0; i < sband->n_bitrates; i++) { 465 if (sband->bitrates[i].hw_value == rx_rate) { 466 rxs->rate_idx = i; 467 return; 468 } 469 if (sband->bitrates[i].hw_value_short == rx_rate) { 470 rxs->rate_idx = i; 471 rxs->flag |= RX_FLAG_SHORTPRE; 472 return; 473 } 474 } 475 476 } 477 478 static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv, 479 struct ath9k_htc_rxbuf *rxbuf, 480 struct ieee80211_rx_status *rx_status) 481 482 { 483 struct ieee80211_hdr *hdr; 484 struct ieee80211_hw *hw = priv->hw; 485 struct sk_buff *skb = rxbuf->skb; 486 struct ath_common *common = ath9k_hw_common(priv->ah); 487 struct ath_htc_rx_status *rxstatus; 488 int hdrlen, padpos, padsize; 489 int last_rssi = ATH_RSSI_DUMMY_MARKER; 490 __le16 fc; 491 492 if (skb->len <= HTC_RX_FRAME_HEADER_SIZE) { 493 ath_err(common, "Corrupted RX frame, dropping\n"); 494 goto rx_next; 495 } 496 497 rxstatus = (struct ath_htc_rx_status *)skb->data; 498 499 if (be16_to_cpu(rxstatus->rs_datalen) - 500 (skb->len - HTC_RX_FRAME_HEADER_SIZE) != 0) { 501 ath_err(common, 502 "Corrupted RX data len, dropping (dlen: %d, skblen: %d)\n", 503 rxstatus->rs_datalen, skb->len); 504 goto rx_next; 505 } 506 507 /* Get the RX status information */ 508 memcpy(&rxbuf->rxstatus, rxstatus, HTC_RX_FRAME_HEADER_SIZE); 509 skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE); 510 511 hdr = (struct ieee80211_hdr *)skb->data; 512 fc = hdr->frame_control; 513 hdrlen = ieee80211_get_hdrlen_from_skb(skb); 514 515 padpos = ath9k_cmn_padpos(fc); 516 517 padsize = padpos & 3; 518 if (padsize && skb->len >= padpos+padsize+FCS_LEN) { 519 memmove(skb->data + padsize, skb->data, padpos); 520 skb_pull(skb, padsize); 521 } 522 523 memset(rx_status, 0, sizeof(struct ieee80211_rx_status)); 524 525 if (rxbuf->rxstatus.rs_status != 0) { 526 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_CRC) 527 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 528 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_PHY) 529 goto rx_next; 530 531 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT) { 532 /* FIXME */ 533 } else if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_MIC) { 534 if (ieee80211_is_ctl(fc)) 535 /* 536 * Sometimes, we get invalid 537 * MIC failures on valid control frames. 538 * Remove these mic errors. 539 */ 540 rxbuf->rxstatus.rs_status &= ~ATH9K_RXERR_MIC; 541 else 542 rx_status->flag |= RX_FLAG_MMIC_ERROR; 543 } 544 545 /* 546 * Reject error frames with the exception of 547 * decryption and MIC failures. For monitor mode, 548 * we also ignore the CRC error. 549 */ 550 if (priv->ah->opmode == NL80211_IFTYPE_MONITOR) { 551 if (rxbuf->rxstatus.rs_status & 552 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC | 553 ATH9K_RXERR_CRC)) 554 goto rx_next; 555 } else { 556 if (rxbuf->rxstatus.rs_status & 557 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) { 558 goto rx_next; 559 } 560 } 561 } 562 563 if (!(rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT)) { 564 u8 keyix; 565 keyix = rxbuf->rxstatus.rs_keyix; 566 if (keyix != ATH9K_RXKEYIX_INVALID) { 567 rx_status->flag |= RX_FLAG_DECRYPTED; 568 } else if (ieee80211_has_protected(fc) && 569 skb->len >= hdrlen + 4) { 570 keyix = skb->data[hdrlen + 3] >> 6; 571 if (test_bit(keyix, common->keymap)) 572 rx_status->flag |= RX_FLAG_DECRYPTED; 573 } 574 } 575 576 ath9k_process_rate(hw, rx_status, rxbuf->rxstatus.rs_rate, 577 rxbuf->rxstatus.rs_flags); 578 579 if (priv->op_flags & OP_ASSOCIATED) { 580 if (rxbuf->rxstatus.rs_rssi != ATH9K_RSSI_BAD && 581 !rxbuf->rxstatus.rs_moreaggr) 582 ATH_RSSI_LPF(priv->rx.last_rssi, 583 rxbuf->rxstatus.rs_rssi); 584 585 last_rssi = priv->rx.last_rssi; 586 587 if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER)) 588 rxbuf->rxstatus.rs_rssi = ATH_EP_RND(last_rssi, 589 ATH_RSSI_EP_MULTIPLIER); 590 591 if (rxbuf->rxstatus.rs_rssi < 0) 592 rxbuf->rxstatus.rs_rssi = 0; 593 594 if (ieee80211_is_beacon(fc)) 595 priv->ah->stats.avgbrssi = rxbuf->rxstatus.rs_rssi; 596 } 597 598 rx_status->mactime = be64_to_cpu(rxbuf->rxstatus.rs_tstamp); 599 rx_status->band = hw->conf.channel->band; 600 rx_status->freq = hw->conf.channel->center_freq; 601 rx_status->signal = rxbuf->rxstatus.rs_rssi + ATH_DEFAULT_NOISE_FLOOR; 602 rx_status->antenna = rxbuf->rxstatus.rs_antenna; 603 rx_status->flag |= RX_FLAG_TSFT; 604 605 return true; 606 607 rx_next: 608 return false; 609 } 610 611 /* 612 * FIXME: Handle FLUSH later on. 613 */ 614 void ath9k_rx_tasklet(unsigned long data) 615 { 616 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data; 617 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL; 618 struct ieee80211_rx_status rx_status; 619 struct sk_buff *skb; 620 unsigned long flags; 621 struct ieee80211_hdr *hdr; 622 623 do { 624 spin_lock_irqsave(&priv->rx.rxbuflock, flags); 625 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) { 626 if (tmp_buf->in_process) { 627 rxbuf = tmp_buf; 628 break; 629 } 630 } 631 632 if (rxbuf == NULL) { 633 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags); 634 break; 635 } 636 637 if (!rxbuf->skb) 638 goto requeue; 639 640 if (!ath9k_rx_prepare(priv, rxbuf, &rx_status)) { 641 dev_kfree_skb_any(rxbuf->skb); 642 goto requeue; 643 } 644 645 memcpy(IEEE80211_SKB_RXCB(rxbuf->skb), &rx_status, 646 sizeof(struct ieee80211_rx_status)); 647 skb = rxbuf->skb; 648 hdr = (struct ieee80211_hdr *) skb->data; 649 650 if (ieee80211_is_beacon(hdr->frame_control) && priv->ps_enabled) 651 ieee80211_queue_work(priv->hw, &priv->ps_work); 652 653 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags); 654 655 ieee80211_rx(priv->hw, skb); 656 657 spin_lock_irqsave(&priv->rx.rxbuflock, flags); 658 requeue: 659 rxbuf->in_process = false; 660 rxbuf->skb = NULL; 661 list_move_tail(&rxbuf->list, &priv->rx.rxbuf); 662 rxbuf = NULL; 663 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags); 664 } while (1); 665 666 } 667 668 void ath9k_htc_rxep(void *drv_priv, struct sk_buff *skb, 669 enum htc_endpoint_id ep_id) 670 { 671 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)drv_priv; 672 struct ath_hw *ah = priv->ah; 673 struct ath_common *common = ath9k_hw_common(ah); 674 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL; 675 676 spin_lock(&priv->rx.rxbuflock); 677 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) { 678 if (!tmp_buf->in_process) { 679 rxbuf = tmp_buf; 680 break; 681 } 682 } 683 spin_unlock(&priv->rx.rxbuflock); 684 685 if (rxbuf == NULL) { 686 ath_dbg(common, ATH_DBG_ANY, 687 "No free RX buffer\n"); 688 goto err; 689 } 690 691 spin_lock(&priv->rx.rxbuflock); 692 rxbuf->skb = skb; 693 rxbuf->in_process = true; 694 spin_unlock(&priv->rx.rxbuflock); 695 696 tasklet_schedule(&priv->rx_tasklet); 697 return; 698 err: 699 dev_kfree_skb_any(skb); 700 } 701 702 /* FIXME: Locking for cleanup/init */ 703 704 void ath9k_rx_cleanup(struct ath9k_htc_priv *priv) 705 { 706 struct ath9k_htc_rxbuf *rxbuf, *tbuf; 707 708 list_for_each_entry_safe(rxbuf, tbuf, &priv->rx.rxbuf, list) { 709 list_del(&rxbuf->list); 710 if (rxbuf->skb) 711 dev_kfree_skb_any(rxbuf->skb); 712 kfree(rxbuf); 713 } 714 } 715 716 int ath9k_rx_init(struct ath9k_htc_priv *priv) 717 { 718 struct ath_hw *ah = priv->ah; 719 struct ath_common *common = ath9k_hw_common(ah); 720 struct ath9k_htc_rxbuf *rxbuf; 721 int i = 0; 722 723 INIT_LIST_HEAD(&priv->rx.rxbuf); 724 spin_lock_init(&priv->rx.rxbuflock); 725 726 for (i = 0; i < ATH9K_HTC_RXBUF; i++) { 727 rxbuf = kzalloc(sizeof(struct ath9k_htc_rxbuf), GFP_KERNEL); 728 if (rxbuf == NULL) { 729 ath_err(common, "Unable to allocate RX buffers\n"); 730 goto err; 731 } 732 list_add_tail(&rxbuf->list, &priv->rx.rxbuf); 733 } 734 735 return 0; 736 737 err: 738 ath9k_rx_cleanup(priv); 739 return -ENOMEM; 740 } 741