1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright(c) 2018 - 2019 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <ilw@linux.intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 33 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH 34 * Copyright(c) 2018 - 2019 Intel Corporation 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 *****************************************************************************/ 63 #include <linux/etherdevice.h> 64 #include <linux/skbuff.h> 65 #include "iwl-trans.h" 66 #include "mvm.h" 67 #include "fw-api.h" 68 69 static void *iwl_mvm_skb_get_hdr(struct sk_buff *skb) 70 { 71 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 72 u8 *data = skb->data; 73 74 /* Alignment concerns */ 75 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he) % 4); 76 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu) % 4); 77 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig) % 4); 78 BUILD_BUG_ON(sizeof(struct ieee80211_vendor_radiotap) % 4); 79 80 if (rx_status->flag & RX_FLAG_RADIOTAP_HE) 81 data += sizeof(struct ieee80211_radiotap_he); 82 if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU) 83 data += sizeof(struct ieee80211_radiotap_he_mu); 84 if (rx_status->flag & RX_FLAG_RADIOTAP_LSIG) 85 data += sizeof(struct ieee80211_radiotap_lsig); 86 if (rx_status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { 87 struct ieee80211_vendor_radiotap *radiotap = (void *)data; 88 89 data += sizeof(*radiotap) + radiotap->len + radiotap->pad; 90 } 91 92 return data; 93 } 94 95 static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb, 96 int queue, struct ieee80211_sta *sta) 97 { 98 struct iwl_mvm_sta *mvmsta; 99 struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb); 100 struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb); 101 struct iwl_mvm_key_pn *ptk_pn; 102 int res; 103 u8 tid, keyidx; 104 u8 pn[IEEE80211_CCMP_PN_LEN]; 105 u8 *extiv; 106 107 /* do PN checking */ 108 109 /* multicast and non-data only arrives on default queue */ 110 if (!ieee80211_is_data(hdr->frame_control) || 111 is_multicast_ether_addr(hdr->addr1)) 112 return 0; 113 114 /* do not check PN for open AP */ 115 if (!(stats->flag & RX_FLAG_DECRYPTED)) 116 return 0; 117 118 /* 119 * avoid checking for default queue - we don't want to replicate 120 * all the logic that's necessary for checking the PN on fragmented 121 * frames, leave that to mac80211 122 */ 123 if (queue == 0) 124 return 0; 125 126 /* if we are here - this for sure is either CCMP or GCMP */ 127 if (IS_ERR_OR_NULL(sta)) { 128 IWL_ERR(mvm, 129 "expected hw-decrypted unicast frame for station\n"); 130 return -1; 131 } 132 133 mvmsta = iwl_mvm_sta_from_mac80211(sta); 134 135 extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 136 keyidx = extiv[3] >> 6; 137 138 ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]); 139 if (!ptk_pn) 140 return -1; 141 142 if (ieee80211_is_data_qos(hdr->frame_control)) 143 tid = ieee80211_get_tid(hdr); 144 else 145 tid = 0; 146 147 /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */ 148 if (tid >= IWL_MAX_TID_COUNT) 149 return -1; 150 151 /* load pn */ 152 pn[0] = extiv[7]; 153 pn[1] = extiv[6]; 154 pn[2] = extiv[5]; 155 pn[3] = extiv[4]; 156 pn[4] = extiv[1]; 157 pn[5] = extiv[0]; 158 159 res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN); 160 if (res < 0) 161 return -1; 162 if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN)) 163 return -1; 164 165 memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN); 166 stats->flag |= RX_FLAG_PN_VALIDATED; 167 168 return 0; 169 } 170 171 /* iwl_mvm_create_skb Adds the rxb to a new skb */ 172 static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 173 struct ieee80211_hdr *hdr, u16 len, u8 crypt_len, 174 struct iwl_rx_cmd_buffer *rxb) 175 { 176 struct iwl_rx_packet *pkt = rxb_addr(rxb); 177 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 178 unsigned int headlen, fraglen, pad_len = 0; 179 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 180 181 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 182 len -= 2; 183 pad_len = 2; 184 } 185 186 /* If frame is small enough to fit in skb->head, pull it completely. 187 * If not, only pull ieee80211_hdr (including crypto if present, and 188 * an additional 8 bytes for SNAP/ethertype, see below) so that 189 * splice() or TCP coalesce are more efficient. 190 * 191 * Since, in addition, ieee80211_data_to_8023() always pull in at 192 * least 8 bytes (possibly more for mesh) we can do the same here 193 * to save the cost of doing it later. That still doesn't pull in 194 * the actual IP header since the typical case has a SNAP header. 195 * If the latter changes (there are efforts in the standards group 196 * to do so) we should revisit this and ieee80211_data_to_8023(). 197 */ 198 headlen = (len <= skb_tailroom(skb)) ? len : 199 hdrlen + crypt_len + 8; 200 201 /* The firmware may align the packet to DWORD. 202 * The padding is inserted after the IV. 203 * After copying the header + IV skip the padding if 204 * present before copying packet data. 205 */ 206 hdrlen += crypt_len; 207 208 if (WARN_ONCE(headlen < hdrlen, 209 "invalid packet lengths (hdrlen=%d, len=%d, crypt_len=%d)\n", 210 hdrlen, len, crypt_len)) { 211 /* 212 * We warn and trace because we want to be able to see 213 * it in trace-cmd as well. 214 */ 215 IWL_DEBUG_RX(mvm, 216 "invalid packet lengths (hdrlen=%d, len=%d, crypt_len=%d)\n", 217 hdrlen, len, crypt_len); 218 return -EINVAL; 219 } 220 221 skb_put_data(skb, hdr, hdrlen); 222 skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen); 223 224 fraglen = len - headlen; 225 226 if (fraglen) { 227 int offset = (void *)hdr + headlen + pad_len - 228 rxb_addr(rxb) + rxb_offset(rxb); 229 230 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 231 fraglen, rxb->truesize); 232 } 233 234 return 0; 235 } 236 237 static void iwl_mvm_add_rtap_sniffer_config(struct iwl_mvm *mvm, 238 struct sk_buff *skb) 239 { 240 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 241 struct ieee80211_vendor_radiotap *radiotap; 242 const int size = sizeof(*radiotap) + sizeof(__le16); 243 244 if (!mvm->cur_aid) 245 return; 246 247 /* ensure alignment */ 248 BUILD_BUG_ON((size + 2) % 4); 249 250 radiotap = skb_put(skb, size + 2); 251 radiotap->align = 1; 252 /* Intel OUI */ 253 radiotap->oui[0] = 0xf6; 254 radiotap->oui[1] = 0x54; 255 radiotap->oui[2] = 0x25; 256 /* radiotap sniffer config sub-namespace */ 257 radiotap->subns = 1; 258 radiotap->present = 0x1; 259 radiotap->len = size - sizeof(*radiotap); 260 radiotap->pad = 2; 261 262 /* fill the data now */ 263 memcpy(radiotap->data, &mvm->cur_aid, sizeof(mvm->cur_aid)); 264 /* and clear the padding */ 265 memset(radiotap->data + sizeof(__le16), 0, radiotap->pad); 266 267 rx_status->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA; 268 } 269 270 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */ 271 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 272 struct napi_struct *napi, 273 struct sk_buff *skb, int queue, 274 struct ieee80211_sta *sta, 275 bool csi) 276 { 277 if (iwl_mvm_check_pn(mvm, skb, queue, sta)) 278 kfree_skb(skb); 279 else 280 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 281 } 282 283 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 284 struct ieee80211_rx_status *rx_status, 285 u32 rate_n_flags, int energy_a, 286 int energy_b) 287 { 288 int max_energy; 289 u32 rate_flags = rate_n_flags; 290 291 energy_a = energy_a ? -energy_a : S8_MIN; 292 energy_b = energy_b ? -energy_b : S8_MIN; 293 max_energy = max(energy_a, energy_b); 294 295 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n", 296 energy_a, energy_b, max_energy); 297 298 rx_status->signal = max_energy; 299 rx_status->chains = 300 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS; 301 rx_status->chain_signal[0] = energy_a; 302 rx_status->chain_signal[1] = energy_b; 303 rx_status->chain_signal[2] = S8_MIN; 304 } 305 306 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, 307 struct ieee80211_rx_status *stats, u16 phy_info, 308 struct iwl_rx_mpdu_desc *desc, 309 u32 pkt_flags, int queue, u8 *crypt_len) 310 { 311 u16 status = le16_to_cpu(desc->status); 312 313 /* 314 * Drop UNKNOWN frames in aggregation, unless in monitor mode 315 * (where we don't have the keys). 316 * We limit this to aggregation because in TKIP this is a valid 317 * scenario, since we may not have the (correct) TTAK (phase 1 318 * key) in the firmware. 319 */ 320 if (phy_info & IWL_RX_MPDU_PHY_AMPDU && 321 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 322 IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on) 323 return -1; 324 325 if (!ieee80211_has_protected(hdr->frame_control) || 326 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 327 IWL_RX_MPDU_STATUS_SEC_NONE) 328 return 0; 329 330 /* TODO: handle packets encrypted with unknown alg */ 331 332 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { 333 case IWL_RX_MPDU_STATUS_SEC_CCM: 334 case IWL_RX_MPDU_STATUS_SEC_GCM: 335 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); 336 /* alg is CCM: check MIC only */ 337 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 338 return -1; 339 340 stats->flag |= RX_FLAG_DECRYPTED; 341 if (pkt_flags & FH_RSCSR_RADA_EN) 342 stats->flag |= RX_FLAG_MIC_STRIPPED; 343 *crypt_len = IEEE80211_CCMP_HDR_LEN; 344 return 0; 345 case IWL_RX_MPDU_STATUS_SEC_TKIP: 346 /* Don't drop the frame and decrypt it in SW */ 347 if (!fw_has_api(&mvm->fw->ucode_capa, 348 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 349 !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) 350 return 0; 351 352 if (mvm->trans->cfg->gen2 && 353 !(status & RX_MPDU_RES_STATUS_MIC_OK)) 354 stats->flag |= RX_FLAG_MMIC_ERROR; 355 356 *crypt_len = IEEE80211_TKIP_IV_LEN; 357 /* fall through */ 358 case IWL_RX_MPDU_STATUS_SEC_WEP: 359 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) 360 return -1; 361 362 stats->flag |= RX_FLAG_DECRYPTED; 363 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == 364 IWL_RX_MPDU_STATUS_SEC_WEP) 365 *crypt_len = IEEE80211_WEP_IV_LEN; 366 367 if (pkt_flags & FH_RSCSR_RADA_EN) { 368 stats->flag |= RX_FLAG_ICV_STRIPPED; 369 if (mvm->trans->cfg->gen2) 370 stats->flag |= RX_FLAG_MMIC_STRIPPED; 371 } 372 373 return 0; 374 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: 375 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 376 return -1; 377 stats->flag |= RX_FLAG_DECRYPTED; 378 return 0; 379 default: 380 /* Expected in monitor (not having the keys) */ 381 if (!mvm->monitor_on) 382 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); 383 } 384 385 return 0; 386 } 387 388 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 389 struct sk_buff *skb, 390 struct iwl_rx_mpdu_desc *desc) 391 { 392 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 393 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 394 u16 flags = le16_to_cpu(desc->l3l4_flags); 395 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >> 396 IWL_RX_L3_PROTO_POS); 397 398 if (mvmvif->features & NETIF_F_RXCSUM && 399 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK && 400 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK || 401 l3_prot == IWL_RX_L3_TYPE_IPV6 || 402 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG)) 403 skb->ip_summed = CHECKSUM_UNNECESSARY; 404 } 405 406 /* 407 * returns true if a packet is a duplicate and should be dropped. 408 * Updates AMSDU PN tracking info 409 */ 410 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue, 411 struct ieee80211_rx_status *rx_status, 412 struct ieee80211_hdr *hdr, 413 struct iwl_rx_mpdu_desc *desc) 414 { 415 struct iwl_mvm_sta *mvm_sta; 416 struct iwl_mvm_rxq_dup_data *dup_data; 417 u8 tid, sub_frame_idx; 418 419 if (WARN_ON(IS_ERR_OR_NULL(sta))) 420 return false; 421 422 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 423 dup_data = &mvm_sta->dup_data[queue]; 424 425 /* 426 * Drop duplicate 802.11 retransmissions 427 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") 428 */ 429 if (ieee80211_is_ctl(hdr->frame_control) || 430 ieee80211_is_qos_nullfunc(hdr->frame_control) || 431 is_multicast_ether_addr(hdr->addr1)) { 432 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 433 return false; 434 } 435 436 if (ieee80211_is_data_qos(hdr->frame_control)) 437 /* frame has qos control */ 438 tid = ieee80211_get_tid(hdr); 439 else 440 tid = IWL_MAX_TID_COUNT; 441 442 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ 443 sub_frame_idx = desc->amsdu_info & 444 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 445 446 if (unlikely(ieee80211_has_retry(hdr->frame_control) && 447 dup_data->last_seq[tid] == hdr->seq_ctrl && 448 dup_data->last_sub_frame[tid] >= sub_frame_idx)) 449 return true; 450 451 /* Allow same PN as the first subframe for following sub frames */ 452 if (dup_data->last_seq[tid] == hdr->seq_ctrl && 453 sub_frame_idx > dup_data->last_sub_frame[tid] && 454 desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) 455 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN; 456 457 dup_data->last_seq[tid] = hdr->seq_ctrl; 458 dup_data->last_sub_frame[tid] = sub_frame_idx; 459 460 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 461 462 return false; 463 } 464 465 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask, 466 const u8 *data, u32 count) 467 { 468 struct iwl_rxq_sync_cmd *cmd; 469 u32 data_size = sizeof(*cmd) + count; 470 int ret; 471 472 /* should be DWORD aligned */ 473 if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE)) 474 return -EINVAL; 475 476 cmd = kzalloc(data_size, GFP_KERNEL); 477 if (!cmd) 478 return -ENOMEM; 479 480 cmd->rxq_mask = cpu_to_le32(rxq_mask); 481 cmd->count = cpu_to_le32(count); 482 cmd->flags = 0; 483 memcpy(cmd->payload, data, count); 484 485 ret = iwl_mvm_send_cmd_pdu(mvm, 486 WIDE_ID(DATA_PATH_GROUP, 487 TRIGGER_RX_QUEUES_NOTIF_CMD), 488 0, data_size, cmd); 489 490 kfree(cmd); 491 return ret; 492 } 493 494 /* 495 * Returns true if sn2 - buffer_size < sn1 < sn2. 496 * To be used only in order to compare reorder buffer head with NSSN. 497 * We fully trust NSSN unless it is behind us due to reorder timeout. 498 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN. 499 */ 500 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size) 501 { 502 return ieee80211_sn_less(sn1, sn2) && 503 !ieee80211_sn_less(sn1, sn2 - buffer_size); 504 } 505 506 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10) 507 508 static void iwl_mvm_release_frames(struct iwl_mvm *mvm, 509 struct ieee80211_sta *sta, 510 struct napi_struct *napi, 511 struct iwl_mvm_baid_data *baid_data, 512 struct iwl_mvm_reorder_buffer *reorder_buf, 513 u16 nssn) 514 { 515 struct iwl_mvm_reorder_buf_entry *entries = 516 &baid_data->entries[reorder_buf->queue * 517 baid_data->entries_per_queue]; 518 u16 ssn = reorder_buf->head_sn; 519 520 lockdep_assert_held(&reorder_buf->lock); 521 522 /* ignore nssn smaller than head sn - this can happen due to timeout */ 523 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size)) 524 goto set_timer; 525 526 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) { 527 int index = ssn % reorder_buf->buf_size; 528 struct sk_buff_head *skb_list = &entries[index].e.frames; 529 struct sk_buff *skb; 530 531 ssn = ieee80211_sn_inc(ssn); 532 533 /* 534 * Empty the list. Will have more than one frame for A-MSDU. 535 * Empty list is valid as well since nssn indicates frames were 536 * received. 537 */ 538 while ((skb = __skb_dequeue(skb_list))) { 539 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, 540 reorder_buf->queue, 541 sta, false); 542 reorder_buf->num_stored--; 543 } 544 } 545 reorder_buf->head_sn = nssn; 546 547 set_timer: 548 if (reorder_buf->num_stored && !reorder_buf->removed) { 549 u16 index = reorder_buf->head_sn % reorder_buf->buf_size; 550 551 while (skb_queue_empty(&entries[index].e.frames)) 552 index = (index + 1) % reorder_buf->buf_size; 553 /* modify timer to match next frame's expiration time */ 554 mod_timer(&reorder_buf->reorder_timer, 555 entries[index].e.reorder_time + 1 + 556 RX_REORDER_BUF_TIMEOUT_MQ); 557 } else { 558 del_timer(&reorder_buf->reorder_timer); 559 } 560 } 561 562 void iwl_mvm_reorder_timer_expired(struct timer_list *t) 563 { 564 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer); 565 struct iwl_mvm_baid_data *baid_data = 566 iwl_mvm_baid_data_from_reorder_buf(buf); 567 struct iwl_mvm_reorder_buf_entry *entries = 568 &baid_data->entries[buf->queue * baid_data->entries_per_queue]; 569 int i; 570 u16 sn = 0, index = 0; 571 bool expired = false; 572 bool cont = false; 573 574 spin_lock(&buf->lock); 575 576 if (!buf->num_stored || buf->removed) { 577 spin_unlock(&buf->lock); 578 return; 579 } 580 581 for (i = 0; i < buf->buf_size ; i++) { 582 index = (buf->head_sn + i) % buf->buf_size; 583 584 if (skb_queue_empty(&entries[index].e.frames)) { 585 /* 586 * If there is a hole and the next frame didn't expire 587 * we want to break and not advance SN 588 */ 589 cont = false; 590 continue; 591 } 592 if (!cont && 593 !time_after(jiffies, entries[index].e.reorder_time + 594 RX_REORDER_BUF_TIMEOUT_MQ)) 595 break; 596 597 expired = true; 598 /* continue until next hole after this expired frames */ 599 cont = true; 600 sn = ieee80211_sn_add(buf->head_sn, i + 1); 601 } 602 603 if (expired) { 604 struct ieee80211_sta *sta; 605 struct iwl_mvm_sta *mvmsta; 606 u8 sta_id = baid_data->sta_id; 607 608 rcu_read_lock(); 609 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]); 610 mvmsta = iwl_mvm_sta_from_mac80211(sta); 611 612 /* SN is set to the last expired frame + 1 */ 613 IWL_DEBUG_HT(buf->mvm, 614 "Releasing expired frames for sta %u, sn %d\n", 615 sta_id, sn); 616 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif, 617 sta, baid_data->tid); 618 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn); 619 rcu_read_unlock(); 620 } else { 621 /* 622 * If no frame expired and there are stored frames, index is now 623 * pointing to the first unexpired frame - modify timer 624 * accordingly to this frame. 625 */ 626 mod_timer(&buf->reorder_timer, 627 entries[index].e.reorder_time + 628 1 + RX_REORDER_BUF_TIMEOUT_MQ); 629 } 630 spin_unlock(&buf->lock); 631 } 632 633 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue, 634 struct iwl_mvm_delba_data *data) 635 { 636 struct iwl_mvm_baid_data *ba_data; 637 struct ieee80211_sta *sta; 638 struct iwl_mvm_reorder_buffer *reorder_buf; 639 u8 baid = data->baid; 640 641 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid)) 642 return; 643 644 rcu_read_lock(); 645 646 ba_data = rcu_dereference(mvm->baid_map[baid]); 647 if (WARN_ON_ONCE(!ba_data)) 648 goto out; 649 650 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 651 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 652 goto out; 653 654 reorder_buf = &ba_data->reorder_buf[queue]; 655 656 /* release all frames that are in the reorder buffer to the stack */ 657 spin_lock_bh(&reorder_buf->lock); 658 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf, 659 ieee80211_sn_add(reorder_buf->head_sn, 660 reorder_buf->buf_size)); 661 spin_unlock_bh(&reorder_buf->lock); 662 del_timer_sync(&reorder_buf->reorder_timer); 663 664 out: 665 rcu_read_unlock(); 666 } 667 668 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 669 int queue) 670 { 671 struct iwl_rx_packet *pkt = rxb_addr(rxb); 672 struct iwl_rxq_sync_notification *notif; 673 struct iwl_mvm_internal_rxq_notif *internal_notif; 674 675 notif = (void *)pkt->data; 676 internal_notif = (void *)notif->payload; 677 678 if (internal_notif->sync && 679 mvm->queue_sync_cookie != internal_notif->cookie) { 680 WARN_ONCE(1, "Received expired RX queue sync message\n"); 681 return; 682 } 683 684 switch (internal_notif->type) { 685 case IWL_MVM_RXQ_EMPTY: 686 break; 687 case IWL_MVM_RXQ_NOTIF_DEL_BA: 688 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data); 689 break; 690 default: 691 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type); 692 } 693 694 if (internal_notif->sync && 695 !atomic_dec_return(&mvm->queue_sync_counter)) 696 wake_up(&mvm->rx_sync_waitq); 697 } 698 699 /* 700 * Returns true if the MPDU was buffered\dropped, false if it should be passed 701 * to upper layer. 702 */ 703 static bool iwl_mvm_reorder(struct iwl_mvm *mvm, 704 struct napi_struct *napi, 705 int queue, 706 struct ieee80211_sta *sta, 707 struct sk_buff *skb, 708 struct iwl_rx_mpdu_desc *desc) 709 { 710 struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb); 711 struct iwl_mvm_sta *mvm_sta; 712 struct iwl_mvm_baid_data *baid_data; 713 struct iwl_mvm_reorder_buffer *buffer; 714 struct sk_buff *tail; 715 u32 reorder = le32_to_cpu(desc->reorder_data); 716 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU; 717 bool last_subframe = 718 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME; 719 u8 tid = ieee80211_get_tid(hdr); 720 u8 sub_frame_idx = desc->amsdu_info & 721 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 722 struct iwl_mvm_reorder_buf_entry *entries; 723 int index; 724 u16 nssn, sn; 725 u8 baid; 726 727 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >> 728 IWL_RX_MPDU_REORDER_BAID_SHIFT; 729 730 /* 731 * This also covers the case of receiving a Block Ack Request 732 * outside a BA session; we'll pass it to mac80211 and that 733 * then sends a delBA action frame. 734 * This also covers pure monitor mode, in which case we won't 735 * have any BA sessions. 736 */ 737 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID) 738 return false; 739 740 /* no sta yet */ 741 if (WARN_ONCE(IS_ERR_OR_NULL(sta), 742 "Got valid BAID without a valid station assigned\n")) 743 return false; 744 745 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 746 747 /* not a data packet or a bar */ 748 if (!ieee80211_is_back_req(hdr->frame_control) && 749 (!ieee80211_is_data_qos(hdr->frame_control) || 750 is_multicast_ether_addr(hdr->addr1))) 751 return false; 752 753 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 754 return false; 755 756 baid_data = rcu_dereference(mvm->baid_map[baid]); 757 if (!baid_data) { 758 IWL_DEBUG_RX(mvm, 759 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 760 baid, reorder); 761 return false; 762 } 763 764 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id, 765 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n", 766 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id, 767 tid)) 768 return false; 769 770 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; 771 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >> 772 IWL_RX_MPDU_REORDER_SN_SHIFT; 773 774 buffer = &baid_data->reorder_buf[queue]; 775 entries = &baid_data->entries[queue * baid_data->entries_per_queue]; 776 777 spin_lock_bh(&buffer->lock); 778 779 if (!buffer->valid) { 780 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) { 781 spin_unlock_bh(&buffer->lock); 782 return false; 783 } 784 buffer->valid = true; 785 } 786 787 if (ieee80211_is_back_req(hdr->frame_control)) { 788 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 789 goto drop; 790 } 791 792 /* 793 * If there was a significant jump in the nssn - adjust. 794 * If the SN is smaller than the NSSN it might need to first go into 795 * the reorder buffer, in which case we just release up to it and the 796 * rest of the function will take care of storing it and releasing up to 797 * the nssn 798 */ 799 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size, 800 buffer->buf_size) || 801 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) { 802 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn; 803 804 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, 805 min_sn); 806 } 807 808 /* drop any oudated packets */ 809 if (ieee80211_sn_less(sn, buffer->head_sn)) 810 goto drop; 811 812 /* release immediately if allowed by nssn and no stored frames */ 813 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) { 814 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn, 815 buffer->buf_size) && 816 (!amsdu || last_subframe)) 817 buffer->head_sn = nssn; 818 /* No need to update AMSDU last SN - we are moving the head */ 819 spin_unlock_bh(&buffer->lock); 820 return false; 821 } 822 823 /* 824 * release immediately if there are no stored frames, and the sn is 825 * equal to the head. 826 * This can happen due to reorder timer, where NSSN is behind head_sn. 827 * When we released everything, and we got the next frame in the 828 * sequence, according to the NSSN we can't release immediately, 829 * while technically there is no hole and we can move forward. 830 */ 831 if (!buffer->num_stored && sn == buffer->head_sn) { 832 if (!amsdu || last_subframe) 833 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn); 834 /* No need to update AMSDU last SN - we are moving the head */ 835 spin_unlock_bh(&buffer->lock); 836 return false; 837 } 838 839 index = sn % buffer->buf_size; 840 841 /* 842 * Check if we already stored this frame 843 * As AMSDU is either received or not as whole, logic is simple: 844 * If we have frames in that position in the buffer and the last frame 845 * originated from AMSDU had a different SN then it is a retransmission. 846 * If it is the same SN then if the subframe index is incrementing it 847 * is the same AMSDU - otherwise it is a retransmission. 848 */ 849 tail = skb_peek_tail(&entries[index].e.frames); 850 if (tail && !amsdu) 851 goto drop; 852 else if (tail && (sn != buffer->last_amsdu || 853 buffer->last_sub_index >= sub_frame_idx)) 854 goto drop; 855 856 /* put in reorder buffer */ 857 __skb_queue_tail(&entries[index].e.frames, skb); 858 buffer->num_stored++; 859 entries[index].e.reorder_time = jiffies; 860 861 if (amsdu) { 862 buffer->last_amsdu = sn; 863 buffer->last_sub_index = sub_frame_idx; 864 } 865 866 /* 867 * We cannot trust NSSN for AMSDU sub-frames that are not the last. 868 * The reason is that NSSN advances on the first sub-frame, and may 869 * cause the reorder buffer to advance before all the sub-frames arrive. 870 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with 871 * SN 1. NSSN for first sub frame will be 3 with the result of driver 872 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is 873 * already ahead and it will be dropped. 874 * If the last sub-frame is not on this queue - we will get frame 875 * release notification with up to date NSSN. 876 */ 877 if (!amsdu || last_subframe) 878 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 879 880 spin_unlock_bh(&buffer->lock); 881 return true; 882 883 drop: 884 kfree_skb(skb); 885 spin_unlock_bh(&buffer->lock); 886 return true; 887 } 888 889 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, 890 u32 reorder_data, u8 baid) 891 { 892 unsigned long now = jiffies; 893 unsigned long timeout; 894 struct iwl_mvm_baid_data *data; 895 896 rcu_read_lock(); 897 898 data = rcu_dereference(mvm->baid_map[baid]); 899 if (!data) { 900 IWL_DEBUG_RX(mvm, 901 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 902 baid, reorder_data); 903 goto out; 904 } 905 906 if (!data->timeout) 907 goto out; 908 909 timeout = data->timeout; 910 /* 911 * Do not update last rx all the time to avoid cache bouncing 912 * between the rx queues. 913 * Update it every timeout. Worst case is the session will 914 * expire after ~ 2 * timeout, which doesn't matter that much. 915 */ 916 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now)) 917 /* Update is atomic */ 918 data->last_rx = now; 919 920 out: 921 rcu_read_unlock(); 922 } 923 924 static void iwl_mvm_flip_address(u8 *addr) 925 { 926 int i; 927 u8 mac_addr[ETH_ALEN]; 928 929 for (i = 0; i < ETH_ALEN; i++) 930 mac_addr[i] = addr[ETH_ALEN - i - 1]; 931 ether_addr_copy(addr, mac_addr); 932 } 933 934 struct iwl_mvm_rx_phy_data { 935 enum iwl_rx_phy_info_type info_type; 936 __le32 d0, d1, d2, d3; 937 __le16 d4; 938 }; 939 940 static void iwl_mvm_decode_he_mu_ext(struct iwl_mvm *mvm, 941 struct iwl_mvm_rx_phy_data *phy_data, 942 u32 rate_n_flags, 943 struct ieee80211_radiotap_he_mu *he_mu) 944 { 945 u32 phy_data2 = le32_to_cpu(phy_data->d2); 946 u32 phy_data3 = le32_to_cpu(phy_data->d3); 947 u16 phy_data4 = le16_to_cpu(phy_data->d4); 948 949 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CRC_OK, phy_data4)) { 950 he_mu->flags1 |= 951 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_RU_KNOWN | 952 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU_KNOWN); 953 954 he_mu->flags1 |= 955 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CTR_RU, 956 phy_data4), 957 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU); 958 959 he_mu->ru_ch1[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU0, 960 phy_data2); 961 he_mu->ru_ch1[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU1, 962 phy_data3); 963 he_mu->ru_ch1[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU2, 964 phy_data2); 965 he_mu->ru_ch1[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU3, 966 phy_data3); 967 } 968 969 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CRC_OK, phy_data4) && 970 (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) != RATE_MCS_CHAN_WIDTH_20) { 971 he_mu->flags1 |= 972 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_RU_KNOWN | 973 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_CTR_26T_RU_KNOWN); 974 975 he_mu->flags2 |= 976 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CTR_RU, 977 phy_data4), 978 IEEE80211_RADIOTAP_HE_MU_FLAGS2_CH2_CTR_26T_RU); 979 980 he_mu->ru_ch2[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU0, 981 phy_data2); 982 he_mu->ru_ch2[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU1, 983 phy_data3); 984 he_mu->ru_ch2[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU2, 985 phy_data2); 986 he_mu->ru_ch2[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU3, 987 phy_data3); 988 } 989 } 990 991 static void 992 iwl_mvm_decode_he_phy_ru_alloc(struct iwl_mvm_rx_phy_data *phy_data, 993 u32 rate_n_flags, 994 struct ieee80211_radiotap_he *he, 995 struct ieee80211_radiotap_he_mu *he_mu, 996 struct ieee80211_rx_status *rx_status) 997 { 998 /* 999 * Unfortunately, we have to leave the mac80211 data 1000 * incorrect for the case that we receive an HE-MU 1001 * transmission and *don't* have the HE phy data (due 1002 * to the bits being used for TSF). This shouldn't 1003 * happen though as management frames where we need 1004 * the TSF/timers are not be transmitted in HE-MU. 1005 */ 1006 u8 ru = le32_get_bits(phy_data->d1, IWL_RX_PHY_DATA1_HE_RU_ALLOC_MASK); 1007 u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; 1008 u8 offs = 0; 1009 1010 rx_status->bw = RATE_INFO_BW_HE_RU; 1011 1012 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1013 1014 switch (ru) { 1015 case 0 ... 36: 1016 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26; 1017 offs = ru; 1018 break; 1019 case 37 ... 52: 1020 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52; 1021 offs = ru - 37; 1022 break; 1023 case 53 ... 60: 1024 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1025 offs = ru - 53; 1026 break; 1027 case 61 ... 64: 1028 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242; 1029 offs = ru - 61; 1030 break; 1031 case 65 ... 66: 1032 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484; 1033 offs = ru - 65; 1034 break; 1035 case 67: 1036 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996; 1037 break; 1038 case 68: 1039 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996; 1040 break; 1041 } 1042 he->data2 |= le16_encode_bits(offs, 1043 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET); 1044 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN | 1045 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET_KNOWN); 1046 if (phy_data->d1 & cpu_to_le32(IWL_RX_PHY_DATA1_HE_RU_ALLOC_SEC80)) 1047 he->data2 |= 1048 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC); 1049 1050 #define CHECK_BW(bw) \ 1051 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_ ## bw ## MHZ != \ 1052 RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS); \ 1053 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_ ## bw ## MHZ != \ 1054 RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS) 1055 CHECK_BW(20); 1056 CHECK_BW(40); 1057 CHECK_BW(80); 1058 CHECK_BW(160); 1059 1060 if (he_mu) 1061 he_mu->flags2 |= 1062 le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK, 1063 rate_n_flags), 1064 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW); 1065 else if (he_type == RATE_MCS_HE_TYPE_TRIG) 1066 he->data6 |= 1067 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_KNOWN) | 1068 le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK, 1069 rate_n_flags), 1070 IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW); 1071 } 1072 1073 static void iwl_mvm_decode_he_phy_data(struct iwl_mvm *mvm, 1074 struct iwl_mvm_rx_phy_data *phy_data, 1075 struct ieee80211_radiotap_he *he, 1076 struct ieee80211_radiotap_he_mu *he_mu, 1077 struct ieee80211_rx_status *rx_status, 1078 u32 rate_n_flags, int queue) 1079 { 1080 switch (phy_data->info_type) { 1081 case IWL_RX_PHY_INFO_TYPE_NONE: 1082 case IWL_RX_PHY_INFO_TYPE_CCK: 1083 case IWL_RX_PHY_INFO_TYPE_OFDM_LGCY: 1084 case IWL_RX_PHY_INFO_TYPE_HT: 1085 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1086 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1087 return; 1088 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1089 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN | 1090 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE2_KNOWN | 1091 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE3_KNOWN | 1092 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE4_KNOWN); 1093 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1094 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE1), 1095 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE1); 1096 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1097 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE2), 1098 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE2); 1099 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1100 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE3), 1101 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE3); 1102 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1103 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE4), 1104 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE4); 1105 /* fall through */ 1106 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1107 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1108 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1109 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1110 /* HE common */ 1111 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_LDPC_XSYMSEG_KNOWN | 1112 IEEE80211_RADIOTAP_HE_DATA1_DOPPLER_KNOWN | 1113 IEEE80211_RADIOTAP_HE_DATA1_BSS_COLOR_KNOWN); 1114 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRE_FEC_PAD_KNOWN | 1115 IEEE80211_RADIOTAP_HE_DATA2_PE_DISAMBIG_KNOWN | 1116 IEEE80211_RADIOTAP_HE_DATA2_TXOP_KNOWN | 1117 IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN); 1118 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1119 IWL_RX_PHY_DATA0_HE_BSS_COLOR_MASK), 1120 IEEE80211_RADIOTAP_HE_DATA3_BSS_COLOR); 1121 if (phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB && 1122 phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB_EXT) { 1123 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN); 1124 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1125 IWL_RX_PHY_DATA0_HE_UPLINK), 1126 IEEE80211_RADIOTAP_HE_DATA3_UL_DL); 1127 } 1128 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1129 IWL_RX_PHY_DATA0_HE_LDPC_EXT_SYM), 1130 IEEE80211_RADIOTAP_HE_DATA3_LDPC_XSYMSEG); 1131 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1132 IWL_RX_PHY_DATA0_HE_PRE_FEC_PAD_MASK), 1133 IEEE80211_RADIOTAP_HE_DATA5_PRE_FEC_PAD); 1134 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1135 IWL_RX_PHY_DATA0_HE_PE_DISAMBIG), 1136 IEEE80211_RADIOTAP_HE_DATA5_PE_DISAMBIG); 1137 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d1, 1138 IWL_RX_PHY_DATA1_HE_LTF_NUM_MASK), 1139 IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS); 1140 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1141 IWL_RX_PHY_DATA0_HE_TXOP_DUR_MASK), 1142 IEEE80211_RADIOTAP_HE_DATA6_TXOP); 1143 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1144 IWL_RX_PHY_DATA0_HE_DOPPLER), 1145 IEEE80211_RADIOTAP_HE_DATA6_DOPPLER); 1146 break; 1147 } 1148 1149 switch (phy_data->info_type) { 1150 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1151 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1152 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1153 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN); 1154 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1155 IWL_RX_PHY_DATA0_HE_SPATIAL_REUSE_MASK), 1156 IEEE80211_RADIOTAP_HE_DATA4_SU_MU_SPTL_REUSE); 1157 break; 1158 default: 1159 /* nothing here */ 1160 break; 1161 } 1162 1163 switch (phy_data->info_type) { 1164 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1165 he_mu->flags1 |= 1166 le16_encode_bits(le16_get_bits(phy_data->d4, 1167 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_DCM), 1168 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM); 1169 he_mu->flags1 |= 1170 le16_encode_bits(le16_get_bits(phy_data->d4, 1171 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_MCS_MASK), 1172 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS); 1173 he_mu->flags2 |= 1174 le16_encode_bits(le16_get_bits(phy_data->d4, 1175 IWL_RX_PHY_DATA4_HE_MU_EXT_PREAMBLE_PUNC_TYPE_MASK), 1176 IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW); 1177 iwl_mvm_decode_he_mu_ext(mvm, phy_data, rate_n_flags, he_mu); 1178 /* fall through */ 1179 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1180 he_mu->flags2 |= 1181 le16_encode_bits(le32_get_bits(phy_data->d1, 1182 IWL_RX_PHY_DATA1_HE_MU_SIBG_SYM_OR_USER_NUM_MASK), 1183 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS); 1184 he_mu->flags2 |= 1185 le16_encode_bits(le32_get_bits(phy_data->d1, 1186 IWL_RX_PHY_DATA1_HE_MU_SIGB_COMPRESSION), 1187 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP); 1188 /* fall through */ 1189 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1190 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1191 iwl_mvm_decode_he_phy_ru_alloc(phy_data, rate_n_flags, 1192 he, he_mu, rx_status); 1193 break; 1194 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1195 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BEAM_CHANGE_KNOWN); 1196 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1197 IWL_RX_PHY_DATA0_HE_BEAM_CHNG), 1198 IEEE80211_RADIOTAP_HE_DATA3_BEAM_CHANGE); 1199 break; 1200 default: 1201 /* nothing */ 1202 break; 1203 } 1204 } 1205 1206 static void iwl_mvm_rx_he(struct iwl_mvm *mvm, struct sk_buff *skb, 1207 struct iwl_mvm_rx_phy_data *phy_data, 1208 u32 rate_n_flags, u16 phy_info, int queue) 1209 { 1210 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1211 struct ieee80211_radiotap_he *he = NULL; 1212 struct ieee80211_radiotap_he_mu *he_mu = NULL; 1213 u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; 1214 u8 stbc, ltf; 1215 static const struct ieee80211_radiotap_he known = { 1216 .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 1217 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 1218 IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN | 1219 IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN), 1220 .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN | 1221 IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN), 1222 }; 1223 static const struct ieee80211_radiotap_he_mu mu_known = { 1224 .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN | 1225 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN | 1226 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN | 1227 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN), 1228 .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN | 1229 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN), 1230 }; 1231 1232 he = skb_put_data(skb, &known, sizeof(known)); 1233 rx_status->flag |= RX_FLAG_RADIOTAP_HE; 1234 1235 if (phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU || 1236 phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU_EXT) { 1237 he_mu = skb_put_data(skb, &mu_known, sizeof(mu_known)); 1238 rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU; 1239 } 1240 1241 /* report the AMPDU-EOF bit on single frames */ 1242 if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1243 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1244 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1245 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1246 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1247 } 1248 1249 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1250 iwl_mvm_decode_he_phy_data(mvm, phy_data, he, he_mu, rx_status, 1251 rate_n_flags, queue); 1252 1253 /* update aggregation data for monitor sake on default queue */ 1254 if (!queue && (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) && 1255 (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1256 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1257 1258 /* toggle is switched whenever new aggregation starts */ 1259 if (toggle_bit != mvm->ampdu_toggle) { 1260 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1261 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1262 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1263 } 1264 } 1265 1266 if (he_type == RATE_MCS_HE_TYPE_EXT_SU && 1267 rate_n_flags & RATE_MCS_HE_106T_MSK) { 1268 rx_status->bw = RATE_INFO_BW_HE_RU; 1269 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1270 } 1271 1272 /* actually data is filled in mac80211 */ 1273 if (he_type == RATE_MCS_HE_TYPE_SU || 1274 he_type == RATE_MCS_HE_TYPE_EXT_SU) 1275 he->data1 |= 1276 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1277 1278 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> RATE_MCS_STBC_POS; 1279 rx_status->nss = 1280 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1281 RATE_VHT_MCS_NSS_POS) + 1; 1282 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1283 rx_status->encoding = RX_ENC_HE; 1284 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1285 if (rate_n_flags & RATE_MCS_BF_MSK) 1286 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1287 1288 rx_status->he_dcm = 1289 !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK); 1290 1291 #define CHECK_TYPE(F) \ 1292 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F != \ 1293 (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS)) 1294 1295 CHECK_TYPE(SU); 1296 CHECK_TYPE(EXT_SU); 1297 CHECK_TYPE(MU); 1298 CHECK_TYPE(TRIG); 1299 1300 he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS); 1301 1302 if (rate_n_flags & RATE_MCS_BF_MSK) 1303 he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF); 1304 1305 switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >> 1306 RATE_MCS_HE_GI_LTF_POS) { 1307 case 0: 1308 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1309 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1310 else 1311 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1312 if (he_type == RATE_MCS_HE_TYPE_MU) 1313 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1314 else 1315 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_1X; 1316 break; 1317 case 1: 1318 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1319 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1320 else 1321 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1322 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1323 break; 1324 case 2: 1325 if (he_type == RATE_MCS_HE_TYPE_TRIG) { 1326 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1327 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1328 } else { 1329 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1330 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1331 } 1332 break; 1333 case 3: 1334 if ((he_type == RATE_MCS_HE_TYPE_SU || 1335 he_type == RATE_MCS_HE_TYPE_EXT_SU) && 1336 rate_n_flags & RATE_MCS_SGI_MSK) 1337 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1338 else 1339 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1340 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1341 break; 1342 } 1343 1344 he->data5 |= le16_encode_bits(ltf, 1345 IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE); 1346 } 1347 1348 static void iwl_mvm_decode_lsig(struct sk_buff *skb, 1349 struct iwl_mvm_rx_phy_data *phy_data) 1350 { 1351 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1352 struct ieee80211_radiotap_lsig *lsig; 1353 1354 switch (phy_data->info_type) { 1355 case IWL_RX_PHY_INFO_TYPE_HT: 1356 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1357 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1358 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1359 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1360 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1361 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1362 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1363 lsig = skb_put(skb, sizeof(*lsig)); 1364 lsig->data1 = cpu_to_le16(IEEE80211_RADIOTAP_LSIG_DATA1_LENGTH_KNOWN); 1365 lsig->data2 = le16_encode_bits(le32_get_bits(phy_data->d1, 1366 IWL_RX_PHY_DATA1_LSIG_LEN_MASK), 1367 IEEE80211_RADIOTAP_LSIG_DATA2_LENGTH); 1368 rx_status->flag |= RX_FLAG_RADIOTAP_LSIG; 1369 break; 1370 default: 1371 break; 1372 } 1373 } 1374 1375 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 1376 struct iwl_rx_cmd_buffer *rxb, int queue) 1377 { 1378 struct ieee80211_rx_status *rx_status; 1379 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1380 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 1381 struct ieee80211_hdr *hdr; 1382 u32 len = le16_to_cpu(desc->mpdu_len); 1383 u32 rate_n_flags, gp2_on_air_rise; 1384 u16 phy_info = le16_to_cpu(desc->phy_info); 1385 struct ieee80211_sta *sta = NULL; 1386 struct sk_buff *skb; 1387 u8 crypt_len = 0, channel, energy_a, energy_b; 1388 size_t desc_size; 1389 struct iwl_mvm_rx_phy_data phy_data = { 1390 .d4 = desc->phy_data4, 1391 .info_type = IWL_RX_PHY_INFO_TYPE_NONE, 1392 }; 1393 bool csi = false; 1394 1395 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 1396 return; 1397 1398 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) { 1399 rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags); 1400 channel = desc->v3.channel; 1401 gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise); 1402 energy_a = desc->v3.energy_a; 1403 energy_b = desc->v3.energy_b; 1404 desc_size = sizeof(*desc); 1405 1406 phy_data.d0 = desc->v3.phy_data0; 1407 phy_data.d1 = desc->v3.phy_data1; 1408 phy_data.d2 = desc->v3.phy_data2; 1409 phy_data.d3 = desc->v3.phy_data3; 1410 } else { 1411 rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags); 1412 channel = desc->v1.channel; 1413 gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise); 1414 energy_a = desc->v1.energy_a; 1415 energy_b = desc->v1.energy_b; 1416 desc_size = IWL_RX_DESC_SIZE_V1; 1417 1418 phy_data.d0 = desc->v1.phy_data0; 1419 phy_data.d1 = desc->v1.phy_data1; 1420 phy_data.d2 = desc->v1.phy_data2; 1421 phy_data.d3 = desc->v1.phy_data3; 1422 } 1423 1424 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1425 phy_data.info_type = 1426 le32_get_bits(phy_data.d1, 1427 IWL_RX_PHY_DATA1_INFO_TYPE_MASK); 1428 1429 hdr = (void *)(pkt->data + desc_size); 1430 /* Dont use dev_alloc_skb(), we'll have enough headroom once 1431 * ieee80211_hdr pulled. 1432 */ 1433 skb = alloc_skb(128, GFP_ATOMIC); 1434 if (!skb) { 1435 IWL_ERR(mvm, "alloc_skb failed\n"); 1436 return; 1437 } 1438 1439 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 1440 /* 1441 * If the device inserted padding it means that (it thought) 1442 * the 802.11 header wasn't a multiple of 4 bytes long. In 1443 * this case, reserve two bytes at the start of the SKB to 1444 * align the payload properly in case we end up copying it. 1445 */ 1446 skb_reserve(skb, 2); 1447 } 1448 1449 rx_status = IEEE80211_SKB_RXCB(skb); 1450 1451 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 1452 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1453 case RATE_MCS_CHAN_WIDTH_20: 1454 break; 1455 case RATE_MCS_CHAN_WIDTH_40: 1456 rx_status->bw = RATE_INFO_BW_40; 1457 break; 1458 case RATE_MCS_CHAN_WIDTH_80: 1459 rx_status->bw = RATE_INFO_BW_80; 1460 break; 1461 case RATE_MCS_CHAN_WIDTH_160: 1462 rx_status->bw = RATE_INFO_BW_160; 1463 break; 1464 } 1465 1466 if (rate_n_flags & RATE_MCS_HE_MSK) 1467 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 1468 phy_info, queue); 1469 1470 iwl_mvm_decode_lsig(skb, &phy_data); 1471 1472 rx_status = IEEE80211_SKB_RXCB(skb); 1473 1474 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, phy_info, desc, 1475 le32_to_cpu(pkt->len_n_flags), queue, 1476 &crypt_len)) { 1477 kfree_skb(skb); 1478 return; 1479 } 1480 1481 /* 1482 * Keep packets with CRC errors (and with overrun) for monitor mode 1483 * (otherwise the firmware discards them) but mark them as bad. 1484 */ 1485 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) || 1486 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { 1487 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", 1488 le16_to_cpu(desc->status)); 1489 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 1490 } 1491 /* set the preamble flag if appropriate */ 1492 if (rate_n_flags & RATE_MCS_CCK_MSK && 1493 phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE) 1494 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 1495 1496 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) { 1497 u64 tsf_on_air_rise; 1498 1499 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) 1500 tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise); 1501 else 1502 tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise); 1503 1504 rx_status->mactime = tsf_on_air_rise; 1505 /* TSF as indicated by the firmware is at INA time */ 1506 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 1507 } 1508 1509 rx_status->device_timestamp = gp2_on_air_rise; 1510 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 1511 NL80211_BAND_2GHZ; 1512 rx_status->freq = ieee80211_channel_to_frequency(channel, 1513 rx_status->band); 1514 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 1515 energy_b); 1516 1517 /* update aggregation data for monitor sake on default queue */ 1518 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1519 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1520 1521 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1522 /* 1523 * Toggle is switched whenever new aggregation starts. Make 1524 * sure ampdu_reference is never 0 so we can later use it to 1525 * see if the frame was really part of an A-MPDU or not. 1526 */ 1527 if (toggle_bit != mvm->ampdu_toggle) { 1528 mvm->ampdu_ref++; 1529 if (mvm->ampdu_ref == 0) 1530 mvm->ampdu_ref++; 1531 mvm->ampdu_toggle = toggle_bit; 1532 } 1533 rx_status->ampdu_reference = mvm->ampdu_ref; 1534 } 1535 1536 if (unlikely(mvm->monitor_on)) 1537 iwl_mvm_add_rtap_sniffer_config(mvm, skb); 1538 1539 rcu_read_lock(); 1540 1541 if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) { 1542 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK; 1543 1544 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 1545 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 1546 if (IS_ERR(sta)) 1547 sta = NULL; 1548 } 1549 } else if (!is_multicast_ether_addr(hdr->addr2)) { 1550 /* 1551 * This is fine since we prevent two stations with the same 1552 * address from being added. 1553 */ 1554 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 1555 } 1556 1557 if (sta) { 1558 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1559 struct ieee80211_vif *tx_blocked_vif = 1560 rcu_dereference(mvm->csa_tx_blocked_vif); 1561 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) & 1562 IWL_RX_MPDU_REORDER_BAID_MASK) >> 1563 IWL_RX_MPDU_REORDER_BAID_SHIFT); 1564 struct iwl_fw_dbg_trigger_tlv *trig; 1565 struct ieee80211_vif *vif = mvmsta->vif; 1566 1567 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 1568 !is_multicast_ether_addr(hdr->addr1) && 1569 ieee80211_is_data(hdr->frame_control) && 1570 time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1571 schedule_delayed_work(&mvm->tcm.work, 0); 1572 1573 /* 1574 * We have tx blocked stations (with CS bit). If we heard 1575 * frames from a blocked station on a new channel we can 1576 * TX to it again. 1577 */ 1578 if (unlikely(tx_blocked_vif) && tx_blocked_vif == vif) { 1579 struct iwl_mvm_vif *mvmvif = 1580 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1581 1582 if (mvmvif->csa_target_freq == rx_status->freq) 1583 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 1584 false); 1585 } 1586 1587 rs_update_last_rssi(mvm, mvmsta, rx_status); 1588 1589 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 1590 ieee80211_vif_to_wdev(vif), 1591 FW_DBG_TRIGGER_RSSI); 1592 1593 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 1594 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 1595 s32 rssi; 1596 1597 rssi_trig = (void *)trig->data; 1598 rssi = le32_to_cpu(rssi_trig->rssi); 1599 1600 if (rx_status->signal < rssi) 1601 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1602 NULL); 1603 } 1604 1605 if (ieee80211_is_data(hdr->frame_control)) 1606 iwl_mvm_rx_csum(sta, skb, desc); 1607 1608 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) { 1609 kfree_skb(skb); 1610 goto out; 1611 } 1612 1613 /* 1614 * Our hardware de-aggregates AMSDUs but copies the mac header 1615 * as it to the de-aggregated MPDUs. We need to turn off the 1616 * AMSDU bit in the QoS control ourselves. 1617 * In addition, HW reverses addr3 and addr4 - reverse it back. 1618 */ 1619 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && 1620 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { 1621 u8 *qc = ieee80211_get_qos_ctl(hdr); 1622 1623 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1624 1625 if (mvm->trans->cfg->device_family == 1626 IWL_DEVICE_FAMILY_9000) { 1627 iwl_mvm_flip_address(hdr->addr3); 1628 1629 if (ieee80211_has_a4(hdr->frame_control)) 1630 iwl_mvm_flip_address(hdr->addr4); 1631 } 1632 } 1633 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) { 1634 u32 reorder_data = le32_to_cpu(desc->reorder_data); 1635 1636 iwl_mvm_agg_rx_received(mvm, reorder_data, baid); 1637 } 1638 } 1639 1640 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 1641 rate_n_flags & RATE_MCS_SGI_MSK) 1642 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1643 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1644 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 1645 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1646 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 1647 if (rate_n_flags & RATE_MCS_HT_MSK) { 1648 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1649 RATE_MCS_STBC_POS; 1650 rx_status->encoding = RX_ENC_HT; 1651 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1652 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1653 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1654 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1655 RATE_MCS_STBC_POS; 1656 rx_status->nss = 1657 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1658 RATE_VHT_MCS_NSS_POS) + 1; 1659 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1660 rx_status->encoding = RX_ENC_VHT; 1661 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1662 if (rate_n_flags & RATE_MCS_BF_MSK) 1663 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1664 } else if (!(rate_n_flags & RATE_MCS_HE_MSK)) { 1665 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1666 rx_status->band); 1667 1668 if (WARN(rate < 0 || rate > 0xFF, 1669 "Invalid rate flags 0x%x, band %d,\n", 1670 rate_n_flags, rx_status->band)) { 1671 kfree_skb(skb); 1672 goto out; 1673 } 1674 rx_status->rate_idx = rate; 1675 } 1676 1677 /* management stuff on default queue */ 1678 if (!queue) { 1679 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 1680 ieee80211_is_probe_resp(hdr->frame_control)) && 1681 mvm->sched_scan_pass_all == 1682 SCHED_SCAN_PASS_ALL_ENABLED)) 1683 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 1684 1685 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 1686 ieee80211_is_probe_resp(hdr->frame_control))) 1687 rx_status->boottime_ns = ktime_get_boot_ns(); 1688 } 1689 1690 if (iwl_mvm_create_skb(mvm, skb, hdr, len, crypt_len, rxb)) { 1691 kfree_skb(skb); 1692 goto out; 1693 } 1694 1695 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc)) 1696 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, 1697 sta, csi); 1698 out: 1699 rcu_read_unlock(); 1700 } 1701 1702 void iwl_mvm_rx_monitor_no_data(struct iwl_mvm *mvm, struct napi_struct *napi, 1703 struct iwl_rx_cmd_buffer *rxb, int queue) 1704 { 1705 struct ieee80211_rx_status *rx_status; 1706 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1707 struct iwl_rx_no_data *desc = (void *)pkt->data; 1708 u32 rate_n_flags = le32_to_cpu(desc->rate); 1709 u32 gp2_on_air_rise = le32_to_cpu(desc->on_air_rise_time); 1710 u32 rssi = le32_to_cpu(desc->rssi); 1711 u32 info_type = le32_to_cpu(desc->info) & RX_NO_DATA_INFO_TYPE_MSK; 1712 u16 phy_info = IWL_RX_MPDU_PHY_TSF_OVERLOAD; 1713 struct ieee80211_sta *sta = NULL; 1714 struct sk_buff *skb; 1715 u8 channel, energy_a, energy_b; 1716 struct iwl_mvm_rx_phy_data phy_data = { 1717 .d0 = desc->phy_info[0], 1718 .info_type = IWL_RX_PHY_INFO_TYPE_NONE, 1719 }; 1720 1721 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 1722 return; 1723 1724 energy_a = (rssi & RX_NO_DATA_CHAIN_A_MSK) >> RX_NO_DATA_CHAIN_A_POS; 1725 energy_b = (rssi & RX_NO_DATA_CHAIN_B_MSK) >> RX_NO_DATA_CHAIN_B_POS; 1726 channel = (rssi & RX_NO_DATA_CHANNEL_MSK) >> RX_NO_DATA_CHANNEL_POS; 1727 1728 phy_data.info_type = 1729 le32_get_bits(desc->phy_info[1], 1730 IWL_RX_PHY_DATA1_INFO_TYPE_MASK); 1731 1732 /* Dont use dev_alloc_skb(), we'll have enough headroom once 1733 * ieee80211_hdr pulled. 1734 */ 1735 skb = alloc_skb(128, GFP_ATOMIC); 1736 if (!skb) { 1737 IWL_ERR(mvm, "alloc_skb failed\n"); 1738 return; 1739 } 1740 1741 rx_status = IEEE80211_SKB_RXCB(skb); 1742 1743 /* 0-length PSDU */ 1744 rx_status->flag |= RX_FLAG_NO_PSDU; 1745 1746 switch (info_type) { 1747 case RX_NO_DATA_INFO_TYPE_NDP: 1748 rx_status->zero_length_psdu_type = 1749 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING; 1750 break; 1751 case RX_NO_DATA_INFO_TYPE_MU_UNMATCHED: 1752 case RX_NO_DATA_INFO_TYPE_HE_TB_UNMATCHED: 1753 rx_status->zero_length_psdu_type = 1754 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_NOT_CAPTURED; 1755 break; 1756 default: 1757 rx_status->zero_length_psdu_type = 1758 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_VENDOR; 1759 break; 1760 } 1761 1762 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 1763 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1764 case RATE_MCS_CHAN_WIDTH_20: 1765 break; 1766 case RATE_MCS_CHAN_WIDTH_40: 1767 rx_status->bw = RATE_INFO_BW_40; 1768 break; 1769 case RATE_MCS_CHAN_WIDTH_80: 1770 rx_status->bw = RATE_INFO_BW_80; 1771 break; 1772 case RATE_MCS_CHAN_WIDTH_160: 1773 rx_status->bw = RATE_INFO_BW_160; 1774 break; 1775 } 1776 1777 if (rate_n_flags & RATE_MCS_HE_MSK) 1778 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 1779 phy_info, queue); 1780 1781 iwl_mvm_decode_lsig(skb, &phy_data); 1782 1783 rx_status->device_timestamp = gp2_on_air_rise; 1784 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 1785 NL80211_BAND_2GHZ; 1786 rx_status->freq = ieee80211_channel_to_frequency(channel, 1787 rx_status->band); 1788 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 1789 energy_b); 1790 1791 rcu_read_lock(); 1792 1793 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 1794 rate_n_flags & RATE_MCS_SGI_MSK) 1795 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1796 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1797 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 1798 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1799 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 1800 if (rate_n_flags & RATE_MCS_HT_MSK) { 1801 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1802 RATE_MCS_STBC_POS; 1803 rx_status->encoding = RX_ENC_HT; 1804 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1805 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1806 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1807 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1808 RATE_MCS_STBC_POS; 1809 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1810 rx_status->encoding = RX_ENC_VHT; 1811 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1812 if (rate_n_flags & RATE_MCS_BF_MSK) 1813 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1814 /* 1815 * take the nss from the rx_vec since the rate_n_flags has 1816 * only 2 bits for the nss which gives a max of 4 ss but 1817 * there may be up to 8 spatial streams 1818 */ 1819 rx_status->nss = 1820 le32_get_bits(desc->rx_vec[0], 1821 RX_NO_DATA_RX_VEC0_VHT_NSTS_MSK) + 1; 1822 } else if (rate_n_flags & RATE_MCS_HE_MSK) { 1823 rx_status->nss = 1824 le32_get_bits(desc->rx_vec[0], 1825 RX_NO_DATA_RX_VEC0_HE_NSTS_MSK) + 1; 1826 } else { 1827 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1828 rx_status->band); 1829 1830 if (WARN(rate < 0 || rate > 0xFF, 1831 "Invalid rate flags 0x%x, band %d,\n", 1832 rate_n_flags, rx_status->band)) { 1833 kfree_skb(skb); 1834 goto out; 1835 } 1836 rx_status->rate_idx = rate; 1837 } 1838 1839 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 1840 out: 1841 rcu_read_unlock(); 1842 } 1843 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 1844 struct iwl_rx_cmd_buffer *rxb, int queue) 1845 { 1846 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1847 struct iwl_frame_release *release = (void *)pkt->data; 1848 struct ieee80211_sta *sta; 1849 struct iwl_mvm_reorder_buffer *reorder_buf; 1850 struct iwl_mvm_baid_data *ba_data; 1851 1852 int baid = release->baid; 1853 1854 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n", 1855 release->baid, le16_to_cpu(release->nssn)); 1856 1857 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 1858 return; 1859 1860 rcu_read_lock(); 1861 1862 ba_data = rcu_dereference(mvm->baid_map[baid]); 1863 if (WARN_ON_ONCE(!ba_data)) 1864 goto out; 1865 1866 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 1867 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1868 goto out; 1869 1870 reorder_buf = &ba_data->reorder_buf[queue]; 1871 1872 spin_lock_bh(&reorder_buf->lock); 1873 iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf, 1874 le16_to_cpu(release->nssn)); 1875 spin_unlock_bh(&reorder_buf->lock); 1876 1877 out: 1878 rcu_read_unlock(); 1879 } 1880